xref: /linux/drivers/scsi/lpfc/lpfc_els.c (revision 88e45067a30918ebb4942120892963e2311330af)
1 /*******************************************************************
2  * This file is part of the Emulex Linux Device Driver for         *
3  * Fibre Channel Host Bus Adapters.                                *
4  * Copyright (C) 2017-2024 Broadcom. All Rights Reserved. The term *
5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
7  * EMULEX and SLI are trademarks of Emulex.                        *
8  * www.broadcom.com                                                *
9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
10  *                                                                 *
11  * This program is free software; you can redistribute it and/or   *
12  * modify it under the terms of version 2 of the GNU General       *
13  * Public License as published by the Free Software Foundation.    *
14  * This program is distributed in the hope that it will be useful. *
15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
20  * more details, a copy of which can be found in the file COPYING  *
21  * included with this package.                                     *
22  *******************************************************************/
23 /* See Fibre Channel protocol T11 FC-LS for details */
24 #include <linux/blkdev.h>
25 #include <linux/pci.h>
26 #include <linux/slab.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 
30 #include <scsi/scsi.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_host.h>
33 #include <scsi/scsi_transport_fc.h>
34 #include <uapi/scsi/fc/fc_fs.h>
35 #include <uapi/scsi/fc/fc_els.h>
36 
37 #include "lpfc_hw4.h"
38 #include "lpfc_hw.h"
39 #include "lpfc_sli.h"
40 #include "lpfc_sli4.h"
41 #include "lpfc_nl.h"
42 #include "lpfc_disc.h"
43 #include "lpfc_scsi.h"
44 #include "lpfc.h"
45 #include "lpfc_logmsg.h"
46 #include "lpfc_crtn.h"
47 #include "lpfc_vport.h"
48 #include "lpfc_debugfs.h"
49 
50 static int lpfc_els_retry(struct lpfc_hba *, struct lpfc_iocbq *,
51 			  struct lpfc_iocbq *);
52 static void lpfc_cmpl_fabric_iocb(struct lpfc_hba *, struct lpfc_iocbq *,
53 			struct lpfc_iocbq *);
54 static void lpfc_fabric_abort_vport(struct lpfc_vport *vport);
55 static int lpfc_issue_els_fdisc(struct lpfc_vport *vport,
56 				struct lpfc_nodelist *ndlp, uint8_t retry);
57 static int lpfc_issue_fabric_iocb(struct lpfc_hba *phba,
58 				  struct lpfc_iocbq *iocb);
59 static void lpfc_cmpl_els_edc(struct lpfc_hba *phba,
60 			      struct lpfc_iocbq *cmdiocb,
61 			      struct lpfc_iocbq *rspiocb);
62 static void lpfc_cmpl_els_uvem(struct lpfc_hba *, struct lpfc_iocbq *,
63 			       struct lpfc_iocbq *);
64 
65 static int lpfc_max_els_tries = 3;
66 
67 static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport);
68 static void lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max);
69 static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid);
70 
71 /**
72  * lpfc_els_chk_latt - Check host link attention event for a vport
73  * @vport: pointer to a host virtual N_Port data structure.
74  *
75  * This routine checks whether there is an outstanding host link
76  * attention event during the discovery process with the @vport. It is done
77  * by reading the HBA's Host Attention (HA) register. If there is any host
78  * link attention events during this @vport's discovery process, the @vport
79  * shall be marked as FC_ABORT_DISCOVERY, a host link attention clear shall
80  * be issued if the link state is not already in host link cleared state,
81  * and a return code shall indicate whether the host link attention event
82  * had happened.
83  *
84  * Note that, if either the host link is in state LPFC_LINK_DOWN or @vport
85  * state in LPFC_VPORT_READY, the request for checking host link attention
86  * event will be ignored and a return code shall indicate no host link
87  * attention event had happened.
88  *
89  * Return codes
90  *   0 - no host link attention event happened
91  *   1 - host link attention event happened
92  **/
93 int
lpfc_els_chk_latt(struct lpfc_vport * vport)94 lpfc_els_chk_latt(struct lpfc_vport *vport)
95 {
96 	struct lpfc_hba  *phba = vport->phba;
97 	uint32_t ha_copy;
98 
99 	if (vport->port_state >= LPFC_VPORT_READY ||
100 	    phba->link_state == LPFC_LINK_DOWN ||
101 	    phba->sli_rev > LPFC_SLI_REV3)
102 		return 0;
103 
104 	/* Read the HBA Host Attention Register */
105 	if (lpfc_readl(phba->HAregaddr, &ha_copy))
106 		return 1;
107 
108 	if (!(ha_copy & HA_LATT))
109 		return 0;
110 
111 	/* Pending Link Event during Discovery */
112 	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
113 			 "0237 Pending Link Event during "
114 			 "Discovery: State x%x\n",
115 			 phba->pport->port_state);
116 
117 	/* CLEAR_LA should re-enable link attention events and
118 	 * we should then immediately take a LATT event. The
119 	 * LATT processing should call lpfc_linkdown() which
120 	 * will cleanup any left over in-progress discovery
121 	 * events.
122 	 */
123 	set_bit(FC_ABORT_DISCOVERY, &vport->fc_flag);
124 
125 	if (phba->link_state != LPFC_CLEAR_LA)
126 		lpfc_issue_clear_la(phba, vport);
127 
128 	return 1;
129 }
130 
lpfc_is_els_acc_rsp(struct lpfc_dmabuf * buf)131 static bool lpfc_is_els_acc_rsp(struct lpfc_dmabuf *buf)
132 {
133 	struct fc_els_ls_acc *rsp = buf->virt;
134 
135 	if (rsp && rsp->la_cmd == ELS_LS_ACC)
136 		return true;
137 	return false;
138 }
139 
140 /**
141  * lpfc_prep_els_iocb - Allocate and prepare a lpfc iocb data structure
142  * @vport: pointer to a host virtual N_Port data structure.
143  * @expect_rsp: flag indicating whether response is expected.
144  * @cmd_size: size of the ELS command.
145  * @retry: number of retries to the command when it fails.
146  * @ndlp: pointer to a node-list data structure.
147  * @did: destination identifier.
148  * @elscmd: the ELS command code.
149  *
150  * This routine is used for allocating a lpfc-IOCB data structure from
151  * the driver lpfc-IOCB free-list and prepare the IOCB with the parameters
152  * passed into the routine for discovery state machine to issue an Extended
153  * Link Service (ELS) commands. It is a generic lpfc-IOCB allocation
154  * and preparation routine that is used by all the discovery state machine
155  * routines and the ELS command-specific fields will be later set up by
156  * the individual discovery machine routines after calling this routine
157  * allocating and preparing a generic IOCB data structure. It fills in the
158  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
159  * payload and response payload (if expected). The reference count on the
160  * ndlp is incremented by 1 and the reference to the ndlp is put into
161  * ndlp of the IOCB data structure for this IOCB to hold the ndlp
162  * reference for the command's callback function to access later.
163  *
164  * Return code
165  *   Pointer to the newly allocated/prepared els iocb data structure
166  *   NULL - when els iocb data structure allocation/preparation failed
167  **/
168 struct lpfc_iocbq *
lpfc_prep_els_iocb(struct lpfc_vport * vport,u8 expect_rsp,u16 cmd_size,u8 retry,struct lpfc_nodelist * ndlp,u32 did,u32 elscmd)169 lpfc_prep_els_iocb(struct lpfc_vport *vport, u8 expect_rsp,
170 		   u16 cmd_size, u8 retry,
171 		   struct lpfc_nodelist *ndlp, u32 did,
172 		   u32 elscmd)
173 {
174 	struct lpfc_hba  *phba = vport->phba;
175 	struct lpfc_iocbq *elsiocb;
176 	struct lpfc_dmabuf *pcmd, *prsp, *pbuflist, *bmp;
177 	struct ulp_bde64_le *bpl;
178 	u32 timeout = 0;
179 
180 	if (!lpfc_is_link_up(phba))
181 		return NULL;
182 
183 	/* Allocate buffer for  command iocb */
184 	elsiocb = lpfc_sli_get_iocbq(phba);
185 	if (!elsiocb)
186 		return NULL;
187 
188 	/*
189 	 * If this command is for fabric controller and HBA running
190 	 * in FIP mode send FLOGI, FDISC and LOGO as FIP frames.
191 	 */
192 	if (did == Fabric_DID &&
193 	    test_bit(HBA_FIP_SUPPORT, &phba->hba_flag) &&
194 	    (elscmd == ELS_CMD_FLOGI ||
195 	     elscmd == ELS_CMD_FDISC ||
196 	     elscmd == ELS_CMD_LOGO))
197 		switch (elscmd) {
198 		case ELS_CMD_FLOGI:
199 			elsiocb->cmd_flag |=
200 				((LPFC_ELS_ID_FLOGI << LPFC_FIP_ELS_ID_SHIFT)
201 				 & LPFC_FIP_ELS_ID_MASK);
202 			break;
203 		case ELS_CMD_FDISC:
204 			elsiocb->cmd_flag |=
205 				((LPFC_ELS_ID_FDISC << LPFC_FIP_ELS_ID_SHIFT)
206 				 & LPFC_FIP_ELS_ID_MASK);
207 			break;
208 		case ELS_CMD_LOGO:
209 			elsiocb->cmd_flag |=
210 				((LPFC_ELS_ID_LOGO << LPFC_FIP_ELS_ID_SHIFT)
211 				 & LPFC_FIP_ELS_ID_MASK);
212 			break;
213 		}
214 	else
215 		elsiocb->cmd_flag &= ~LPFC_FIP_ELS_ID_MASK;
216 
217 	/* fill in BDEs for command */
218 	/* Allocate buffer for command payload */
219 	pcmd = kmalloc(sizeof(*pcmd), GFP_KERNEL);
220 	if (pcmd)
221 		pcmd->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &pcmd->phys);
222 	if (!pcmd || !pcmd->virt)
223 		goto els_iocb_free_pcmb_exit;
224 
225 	INIT_LIST_HEAD(&pcmd->list);
226 
227 	/* Allocate buffer for response payload */
228 	if (expect_rsp) {
229 		prsp = kmalloc(sizeof(*prsp), GFP_KERNEL);
230 		if (prsp)
231 			prsp->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
232 						     &prsp->phys);
233 		if (!prsp || !prsp->virt)
234 			goto els_iocb_free_prsp_exit;
235 		INIT_LIST_HEAD(&prsp->list);
236 	} else {
237 		prsp = NULL;
238 	}
239 
240 	/* Allocate buffer for Buffer ptr list */
241 	pbuflist = kmalloc(sizeof(*pbuflist), GFP_KERNEL);
242 	if (pbuflist)
243 		pbuflist->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
244 						 &pbuflist->phys);
245 	if (!pbuflist || !pbuflist->virt)
246 		goto els_iocb_free_pbuf_exit;
247 
248 	INIT_LIST_HEAD(&pbuflist->list);
249 
250 	if (expect_rsp) {
251 		switch (elscmd) {
252 		case ELS_CMD_FLOGI:
253 			timeout = FF_DEF_RATOV * 2;
254 			break;
255 		case ELS_CMD_LOGO:
256 			timeout = phba->fc_ratov;
257 			break;
258 		default:
259 			timeout = phba->fc_ratov * 2;
260 		}
261 
262 		/* Fill SGE for the num bde count */
263 		elsiocb->num_bdes = 2;
264 	}
265 
266 	if (phba->sli_rev == LPFC_SLI_REV4)
267 		bmp = pcmd;
268 	else
269 		bmp = pbuflist;
270 
271 	lpfc_sli_prep_els_req_rsp(phba, elsiocb, vport, bmp, cmd_size, did,
272 				  elscmd, timeout, expect_rsp);
273 
274 	bpl = (struct ulp_bde64_le *)pbuflist->virt;
275 	bpl->addr_low = cpu_to_le32(putPaddrLow(pcmd->phys));
276 	bpl->addr_high = cpu_to_le32(putPaddrHigh(pcmd->phys));
277 	bpl->type_size = cpu_to_le32(cmd_size);
278 	bpl->type_size |= cpu_to_le32(ULP_BDE64_TYPE_BDE_64);
279 
280 	if (expect_rsp) {
281 		bpl++;
282 		bpl->addr_low = cpu_to_le32(putPaddrLow(prsp->phys));
283 		bpl->addr_high = cpu_to_le32(putPaddrHigh(prsp->phys));
284 		bpl->type_size = cpu_to_le32(FCELSSIZE);
285 		bpl->type_size |= cpu_to_le32(ULP_BDE64_TYPE_BDE_64);
286 	}
287 
288 	elsiocb->cmd_dmabuf = pcmd;
289 	elsiocb->bpl_dmabuf = pbuflist;
290 	elsiocb->retry = retry;
291 	elsiocb->vport = vport;
292 	elsiocb->drvrTimeout = (phba->fc_ratov << 1) + LPFC_DRVR_TIMEOUT;
293 
294 	if (prsp)
295 		list_add(&prsp->list, &pcmd->list);
296 	if (expect_rsp) {
297 		/* Xmit ELS command <elsCmd> to remote NPORT <did> */
298 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
299 				 "0116 Xmit ELS command x%x to remote "
300 				 "NPORT x%x I/O tag: x%x, port state:x%x "
301 				 "rpi x%x fc_flag:x%lx\n",
302 				 elscmd, did, elsiocb->iotag,
303 				 vport->port_state, ndlp->nlp_rpi,
304 				 vport->fc_flag);
305 	} else {
306 		/* Xmit ELS response <elsCmd> to remote NPORT <did> */
307 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
308 				 "0117 Xmit ELS response x%x to remote "
309 				 "NPORT x%x I/O tag: x%x, size: x%x "
310 				 "port_state x%x  rpi x%x fc_flag x%lx\n",
311 				 elscmd, ndlp->nlp_DID, elsiocb->iotag,
312 				 cmd_size, vport->port_state,
313 				 ndlp->nlp_rpi, vport->fc_flag);
314 	}
315 
316 	return elsiocb;
317 
318 els_iocb_free_pbuf_exit:
319 	if (expect_rsp)
320 		lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
321 	kfree(pbuflist);
322 
323 els_iocb_free_prsp_exit:
324 	lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
325 	kfree(prsp);
326 
327 els_iocb_free_pcmb_exit:
328 	kfree(pcmd);
329 	lpfc_sli_release_iocbq(phba, elsiocb);
330 	return NULL;
331 }
332 
333 /**
334  * lpfc_issue_fabric_reglogin - Issue fabric registration login for a vport
335  * @vport: pointer to a host virtual N_Port data structure.
336  *
337  * This routine issues a fabric registration login for a @vport. An
338  * active ndlp node with Fabric_DID must already exist for this @vport.
339  * The routine invokes two mailbox commands to carry out fabric registration
340  * login through the HBA firmware: the first mailbox command requests the
341  * HBA to perform link configuration for the @vport; and the second mailbox
342  * command requests the HBA to perform the actual fabric registration login
343  * with the @vport.
344  *
345  * Return code
346  *   0 - successfully issued fabric registration login for @vport
347  *   -ENXIO -- failed to issue fabric registration login for @vport
348  **/
349 int
lpfc_issue_fabric_reglogin(struct lpfc_vport * vport)350 lpfc_issue_fabric_reglogin(struct lpfc_vport *vport)
351 {
352 	struct lpfc_hba  *phba = vport->phba;
353 	LPFC_MBOXQ_t *mbox;
354 	struct lpfc_nodelist *ndlp;
355 	struct serv_parm *sp;
356 	int rc;
357 	int err = 0;
358 
359 	sp = &phba->fc_fabparam;
360 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
361 	if (!ndlp) {
362 		err = 1;
363 		goto fail;
364 	}
365 
366 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
367 	if (!mbox) {
368 		err = 2;
369 		goto fail;
370 	}
371 
372 	vport->port_state = LPFC_FABRIC_CFG_LINK;
373 	lpfc_config_link(phba, mbox);
374 	mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
375 	mbox->vport = vport;
376 
377 	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
378 	if (rc == MBX_NOT_FINISHED) {
379 		err = 3;
380 		goto fail_free_mbox;
381 	}
382 
383 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
384 	if (!mbox) {
385 		err = 4;
386 		goto fail;
387 	}
388 	rc = lpfc_reg_rpi(phba, vport->vpi, Fabric_DID, (uint8_t *)sp, mbox,
389 			  ndlp->nlp_rpi);
390 	if (rc) {
391 		err = 5;
392 		goto fail_free_mbox;
393 	}
394 
395 	mbox->mbox_cmpl = lpfc_mbx_cmpl_fabric_reg_login;
396 	mbox->vport = vport;
397 	/* increment the reference count on ndlp to hold reference
398 	 * for the callback routine.
399 	 */
400 	mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
401 	if (!mbox->ctx_ndlp) {
402 		err = 6;
403 		goto fail_free_mbox;
404 	}
405 
406 	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
407 	if (rc == MBX_NOT_FINISHED) {
408 		err = 7;
409 		goto fail_issue_reg_login;
410 	}
411 
412 	return 0;
413 
414 fail_issue_reg_login:
415 	/* decrement the reference count on ndlp just incremented
416 	 * for the failed mbox command.
417 	 */
418 	lpfc_nlp_put(ndlp);
419 fail_free_mbox:
420 	lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
421 fail:
422 	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
423 	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
424 			 "0249 Cannot issue Register Fabric login: Err %d\n",
425 			 err);
426 	return -ENXIO;
427 }
428 
429 /**
430  * lpfc_issue_reg_vfi - Register VFI for this vport's fabric login
431  * @vport: pointer to a host virtual N_Port data structure.
432  *
433  * This routine issues a REG_VFI mailbox for the vfi, vpi, fcfi triplet for
434  * the @vport. This mailbox command is necessary for SLI4 port only.
435  *
436  * Return code
437  *   0 - successfully issued REG_VFI for @vport
438  *   A failure code otherwise.
439  **/
440 int
lpfc_issue_reg_vfi(struct lpfc_vport * vport)441 lpfc_issue_reg_vfi(struct lpfc_vport *vport)
442 {
443 	struct lpfc_hba  *phba = vport->phba;
444 	LPFC_MBOXQ_t *mboxq = NULL;
445 	struct lpfc_nodelist *ndlp;
446 	struct lpfc_dmabuf *dmabuf = NULL;
447 	int rc = 0;
448 
449 	/* move forward in case of SLI4 FC port loopback test and pt2pt mode */
450 	if ((phba->sli_rev == LPFC_SLI_REV4) &&
451 	    !(phba->link_flag & LS_LOOPBACK_MODE) &&
452 	    !test_bit(FC_PT2PT, &vport->fc_flag)) {
453 		ndlp = lpfc_findnode_did(vport, Fabric_DID);
454 		if (!ndlp) {
455 			rc = -ENODEV;
456 			goto fail;
457 		}
458 	}
459 
460 	mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
461 	if (!mboxq) {
462 		rc = -ENOMEM;
463 		goto fail;
464 	}
465 
466 	/* Supply CSP's only if we are fabric connect or pt-to-pt connect */
467 	if (test_bit(FC_FABRIC, &vport->fc_flag) ||
468 	    test_bit(FC_PT2PT, &vport->fc_flag)) {
469 		rc = lpfc_mbox_rsrc_prep(phba, mboxq);
470 		if (rc) {
471 			rc = -ENOMEM;
472 			goto fail_mbox;
473 		}
474 		dmabuf = mboxq->ctx_buf;
475 		memcpy(dmabuf->virt, &phba->fc_fabparam,
476 		       sizeof(struct serv_parm));
477 	}
478 
479 	vport->port_state = LPFC_FABRIC_CFG_LINK;
480 	if (dmabuf) {
481 		lpfc_reg_vfi(mboxq, vport, dmabuf->phys);
482 		/* lpfc_reg_vfi memsets the mailbox.  Restore the ctx_buf. */
483 		mboxq->ctx_buf = dmabuf;
484 	} else {
485 		lpfc_reg_vfi(mboxq, vport, 0);
486 	}
487 
488 	mboxq->mbox_cmpl = lpfc_mbx_cmpl_reg_vfi;
489 	mboxq->vport = vport;
490 	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
491 	if (rc == MBX_NOT_FINISHED) {
492 		rc = -ENXIO;
493 		goto fail_mbox;
494 	}
495 	return 0;
496 
497 fail_mbox:
498 	lpfc_mbox_rsrc_cleanup(phba, mboxq, MBOX_THD_UNLOCKED);
499 fail:
500 	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
501 	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
502 			 "0289 Issue Register VFI failed: Err %d\n", rc);
503 	return rc;
504 }
505 
506 /**
507  * lpfc_issue_unreg_vfi - Unregister VFI for this vport's fabric login
508  * @vport: pointer to a host virtual N_Port data structure.
509  *
510  * This routine issues a UNREG_VFI mailbox with the vfi, vpi, fcfi triplet for
511  * the @vport. This mailbox command is necessary for SLI4 port only.
512  *
513  * Return code
514  *   0 - successfully issued REG_VFI for @vport
515  *   A failure code otherwise.
516  **/
517 int
lpfc_issue_unreg_vfi(struct lpfc_vport * vport)518 lpfc_issue_unreg_vfi(struct lpfc_vport *vport)
519 {
520 	struct lpfc_hba *phba = vport->phba;
521 	LPFC_MBOXQ_t *mboxq;
522 	int rc;
523 
524 	mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
525 	if (!mboxq) {
526 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
527 				"2556 UNREG_VFI mbox allocation failed"
528 				"HBA state x%x\n", phba->pport->port_state);
529 		return -ENOMEM;
530 	}
531 
532 	lpfc_unreg_vfi(mboxq, vport);
533 	mboxq->vport = vport;
534 	mboxq->mbox_cmpl = lpfc_unregister_vfi_cmpl;
535 
536 	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
537 	if (rc == MBX_NOT_FINISHED) {
538 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
539 				"2557 UNREG_VFI issue mbox failed rc x%x "
540 				"HBA state x%x\n",
541 				rc, phba->pport->port_state);
542 		mempool_free(mboxq, phba->mbox_mem_pool);
543 		return -EIO;
544 	}
545 
546 	clear_bit(FC_VFI_REGISTERED, &vport->fc_flag);
547 	return 0;
548 }
549 
550 /**
551  * lpfc_check_clean_addr_bit - Check whether assigned FCID is clean.
552  * @vport: pointer to a host virtual N_Port data structure.
553  * @sp: pointer to service parameter data structure.
554  *
555  * This routine is called from FLOGI/FDISC completion handler functions.
556  * lpfc_check_clean_addr_bit return 1 when FCID/Fabric portname/ Fabric
557  * node nodename is changed in the completion service parameter else return
558  * 0. This function also set flag in the vport data structure to delay
559  * NP_Port discovery after the FLOGI/FDISC completion if Clean address bit
560  * in FLOGI/FDISC response is cleared and FCID/Fabric portname/ Fabric
561  * node nodename is changed in the completion service parameter.
562  *
563  * Return code
564  *   0 - FCID and Fabric Nodename and Fabric portname is not changed.
565  *   1 - FCID or Fabric Nodename or Fabric portname is changed.
566  *
567  **/
568 static uint8_t
lpfc_check_clean_addr_bit(struct lpfc_vport * vport,struct serv_parm * sp)569 lpfc_check_clean_addr_bit(struct lpfc_vport *vport,
570 		struct serv_parm *sp)
571 {
572 	struct lpfc_hba *phba = vport->phba;
573 	uint8_t fabric_param_changed = 0;
574 
575 	if ((vport->fc_prevDID != vport->fc_myDID) ||
576 		memcmp(&vport->fabric_portname, &sp->portName,
577 			sizeof(struct lpfc_name)) ||
578 		memcmp(&vport->fabric_nodename, &sp->nodeName,
579 			sizeof(struct lpfc_name)) ||
580 		(vport->vport_flag & FAWWPN_PARAM_CHG)) {
581 		fabric_param_changed = 1;
582 		vport->vport_flag &= ~FAWWPN_PARAM_CHG;
583 	}
584 	/*
585 	 * Word 1 Bit 31 in common service parameter is overloaded.
586 	 * Word 1 Bit 31 in FLOGI request is multiple NPort request
587 	 * Word 1 Bit 31 in FLOGI response is clean address bit
588 	 *
589 	 * If fabric parameter is changed and clean address bit is
590 	 * cleared delay nport discovery if
591 	 * - vport->fc_prevDID != 0 (not initial discovery) OR
592 	 * - lpfc_delay_discovery module parameter is set.
593 	 */
594 	if (fabric_param_changed && !sp->cmn.clean_address_bit &&
595 	    (vport->fc_prevDID || phba->cfg_delay_discovery))
596 		set_bit(FC_DISC_DELAYED, &vport->fc_flag);
597 
598 	return fabric_param_changed;
599 }
600 
601 
602 /**
603  * lpfc_cmpl_els_flogi_fabric - Completion function for flogi to a fabric port
604  * @vport: pointer to a host virtual N_Port data structure.
605  * @ndlp: pointer to a node-list data structure.
606  * @sp: pointer to service parameter data structure.
607  * @ulp_word4: command response value
608  *
609  * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
610  * function to handle the completion of a Fabric Login (FLOGI) into a fabric
611  * port in a fabric topology. It properly sets up the parameters to the @ndlp
612  * from the IOCB response. It also check the newly assigned N_Port ID to the
613  * @vport against the previously assigned N_Port ID. If it is different from
614  * the previously assigned Destination ID (DID), the lpfc_unreg_rpi() routine
615  * is invoked on all the remaining nodes with the @vport to unregister the
616  * Remote Port Indicators (RPIs). Finally, the lpfc_issue_fabric_reglogin()
617  * is invoked to register login to the fabric.
618  *
619  * Return code
620  *   0 - Success (currently, always return 0)
621  **/
622 static int
lpfc_cmpl_els_flogi_fabric(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,struct serv_parm * sp,uint32_t ulp_word4)623 lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
624 			   struct serv_parm *sp, uint32_t ulp_word4)
625 {
626 	struct lpfc_hba  *phba = vport->phba;
627 	struct lpfc_nodelist *np;
628 	struct lpfc_nodelist *next_np;
629 	uint8_t fabric_param_changed;
630 
631 	set_bit(FC_FABRIC, &vport->fc_flag);
632 
633 	phba->fc_edtov = be32_to_cpu(sp->cmn.e_d_tov);
634 	if (sp->cmn.edtovResolution)	/* E_D_TOV ticks are in nanoseconds */
635 		phba->fc_edtov = (phba->fc_edtov + 999999) / 1000000;
636 
637 	phba->fc_edtovResol = sp->cmn.edtovResolution;
638 	phba->fc_ratov = (be32_to_cpu(sp->cmn.w2.r_a_tov) + 999) / 1000;
639 
640 	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP)
641 		set_bit(FC_PUBLIC_LOOP, &vport->fc_flag);
642 
643 	vport->fc_myDID = ulp_word4 & Mask_DID;
644 	memcpy(&ndlp->nlp_portname, &sp->portName, sizeof(struct lpfc_name));
645 	memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof(struct lpfc_name));
646 	ndlp->nlp_class_sup = 0;
647 	if (sp->cls1.classValid)
648 		ndlp->nlp_class_sup |= FC_COS_CLASS1;
649 	if (sp->cls2.classValid)
650 		ndlp->nlp_class_sup |= FC_COS_CLASS2;
651 	if (sp->cls3.classValid)
652 		ndlp->nlp_class_sup |= FC_COS_CLASS3;
653 	if (sp->cls4.classValid)
654 		ndlp->nlp_class_sup |= FC_COS_CLASS4;
655 	ndlp->nlp_maxframe = ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
656 				sp->cmn.bbRcvSizeLsb;
657 
658 	fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
659 	if (fabric_param_changed) {
660 		/* Reset FDMI attribute masks based on config parameter */
661 		if (phba->cfg_enable_SmartSAN ||
662 		    (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
663 			/* Setup appropriate attribute masks */
664 			vport->fdmi_hba_mask = LPFC_FDMI2_HBA_ATTR;
665 			if (phba->cfg_enable_SmartSAN)
666 				vport->fdmi_port_mask = LPFC_FDMI2_SMART_ATTR;
667 			else
668 				vport->fdmi_port_mask = LPFC_FDMI2_PORT_ATTR;
669 		} else {
670 			vport->fdmi_hba_mask = 0;
671 			vport->fdmi_port_mask = 0;
672 		}
673 
674 	}
675 	memcpy(&vport->fabric_portname, &sp->portName,
676 			sizeof(struct lpfc_name));
677 	memcpy(&vport->fabric_nodename, &sp->nodeName,
678 			sizeof(struct lpfc_name));
679 	memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
680 
681 	if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
682 		if (sp->cmn.response_multiple_NPort) {
683 			lpfc_printf_vlog(vport, KERN_WARNING,
684 					 LOG_ELS | LOG_VPORT,
685 					 "1816 FLOGI NPIV supported, "
686 					 "response data 0x%x\n",
687 					 sp->cmn.response_multiple_NPort);
688 			spin_lock_irq(&phba->hbalock);
689 			phba->link_flag |= LS_NPIV_FAB_SUPPORTED;
690 			spin_unlock_irq(&phba->hbalock);
691 		} else {
692 			/* Because we asked f/w for NPIV it still expects us
693 			to call reg_vnpid at least for the physical host */
694 			lpfc_printf_vlog(vport, KERN_WARNING,
695 					 LOG_ELS | LOG_VPORT,
696 					 "1817 Fabric does not support NPIV "
697 					 "- configuring single port mode.\n");
698 			spin_lock_irq(&phba->hbalock);
699 			phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
700 			spin_unlock_irq(&phba->hbalock);
701 		}
702 	}
703 
704 	/*
705 	 * For FC we need to do some special processing because of the SLI
706 	 * Port's default settings of the Common Service Parameters.
707 	 */
708 	if ((phba->sli_rev == LPFC_SLI_REV4) &&
709 	    (phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_FC)) {
710 		/* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
711 		if (fabric_param_changed)
712 			lpfc_unregister_fcf_prep(phba);
713 
714 		/* This should just update the VFI CSPs*/
715 		if (test_bit(FC_VFI_REGISTERED, &vport->fc_flag))
716 			lpfc_issue_reg_vfi(vport);
717 	}
718 
719 	if (fabric_param_changed &&
720 		!test_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag)) {
721 
722 		/* If our NportID changed, we need to ensure all
723 		 * remaining NPORTs get unreg_login'ed.
724 		 */
725 		list_for_each_entry_safe(np, next_np,
726 					&vport->fc_nodes, nlp_listp) {
727 			if ((np->nlp_state != NLP_STE_NPR_NODE) ||
728 			    !test_bit(NLP_NPR_ADISC, &np->nlp_flag))
729 				continue;
730 			clear_bit(NLP_NPR_ADISC, &np->nlp_flag);
731 			lpfc_unreg_rpi(vport, np);
732 		}
733 		lpfc_cleanup_pending_mbox(vport);
734 
735 		if (phba->sli_rev == LPFC_SLI_REV4) {
736 			lpfc_sli4_unreg_all_rpis(vport);
737 			lpfc_mbx_unreg_vpi(vport);
738 			set_bit(FC_VPORT_NEEDS_INIT_VPI, &vport->fc_flag);
739 		}
740 
741 		/*
742 		 * For SLI3 and SLI4, the VPI needs to be reregistered in
743 		 * response to this fabric parameter change event.
744 		 */
745 		set_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag);
746 	} else if ((phba->sli_rev == LPFC_SLI_REV4) &&
747 		   !test_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag)) {
748 			/*
749 			 * Driver needs to re-reg VPI in order for f/w
750 			 * to update the MAC address.
751 			 */
752 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
753 			lpfc_register_new_vport(phba, vport, ndlp);
754 			return 0;
755 	}
756 
757 	if (phba->sli_rev < LPFC_SLI_REV4) {
758 		lpfc_nlp_set_state(vport, ndlp, NLP_STE_REG_LOGIN_ISSUE);
759 		if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED &&
760 		    test_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag))
761 			lpfc_register_new_vport(phba, vport, ndlp);
762 		else
763 			lpfc_issue_fabric_reglogin(vport);
764 	} else {
765 		ndlp->nlp_type |= NLP_FABRIC;
766 		lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
767 		if ((!test_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag)) &&
768 		    (vport->vpi_state & LPFC_VPI_REGISTERED)) {
769 			lpfc_start_fdiscs(phba);
770 			lpfc_do_scr_ns_plogi(phba, vport);
771 		} else if (test_bit(FC_VFI_REGISTERED, &vport->fc_flag))
772 			lpfc_issue_init_vpi(vport);
773 		else {
774 			lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
775 					"3135 Need register VFI: (x%x/%x)\n",
776 					vport->fc_prevDID, vport->fc_myDID);
777 			lpfc_issue_reg_vfi(vport);
778 		}
779 	}
780 	return 0;
781 }
782 
783 /**
784  * lpfc_cmpl_els_flogi_nport - Completion function for flogi to an N_Port
785  * @vport: pointer to a host virtual N_Port data structure.
786  * @ndlp: pointer to a node-list data structure.
787  * @sp: pointer to service parameter data structure.
788  *
789  * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
790  * function to handle the completion of a Fabric Login (FLOGI) into an N_Port
791  * in a point-to-point topology. First, the @vport's N_Port Name is compared
792  * with the received N_Port Name: if the @vport's N_Port Name is greater than
793  * the received N_Port Name lexicographically, this node shall assign local
794  * N_Port ID (PT2PT_LocalID: 1) and remote N_Port ID (PT2PT_RemoteID: 2) and
795  * will send out Port Login (PLOGI) with the N_Port IDs assigned. Otherwise,
796  * this node shall just wait for the remote node to issue PLOGI and assign
797  * N_Port IDs.
798  *
799  * Return code
800  *   0 - Success
801  *   -ENXIO - Fail
802  **/
803 static int
lpfc_cmpl_els_flogi_nport(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,struct serv_parm * sp)804 lpfc_cmpl_els_flogi_nport(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
805 			  struct serv_parm *sp)
806 {
807 	struct lpfc_hba  *phba = vport->phba;
808 	LPFC_MBOXQ_t *mbox;
809 	int rc;
810 
811 	clear_bit(FC_FABRIC, &vport->fc_flag);
812 	clear_bit(FC_PUBLIC_LOOP, &vport->fc_flag);
813 	set_bit(FC_PT2PT, &vport->fc_flag);
814 
815 	/* If we are pt2pt with another NPort, force NPIV off! */
816 	phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
817 
818 	/* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
819 	if ((phba->sli_rev == LPFC_SLI_REV4) && phba->fc_topology_changed) {
820 		lpfc_unregister_fcf_prep(phba);
821 		clear_bit(FC_VFI_REGISTERED, &vport->fc_flag);
822 		phba->fc_topology_changed = 0;
823 	}
824 
825 	rc = memcmp(&vport->fc_portname, &sp->portName,
826 		    sizeof(vport->fc_portname));
827 
828 	if (rc >= 0) {
829 		/* This side will initiate the PLOGI */
830 		set_bit(FC_PT2PT_PLOGI, &vport->fc_flag);
831 
832 		/*
833 		 * N_Port ID cannot be 0, set our Id to LocalID
834 		 * the other side will be RemoteID.
835 		 */
836 
837 		/* not equal */
838 		if (rc)
839 			vport->fc_myDID = PT2PT_LocalID;
840 
841 		/* If not registered with a transport, decrement ndlp reference
842 		 * count indicating that ndlp can be safely released when other
843 		 * references are removed.
844 		 */
845 		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)))
846 			lpfc_nlp_put(ndlp);
847 
848 		ndlp = lpfc_findnode_did(vport, PT2PT_RemoteID);
849 		if (!ndlp) {
850 			/*
851 			 * Cannot find existing Fabric ndlp, so allocate a
852 			 * new one
853 			 */
854 			ndlp = lpfc_nlp_init(vport, PT2PT_RemoteID);
855 			if (!ndlp)
856 				goto fail;
857 		}
858 
859 		memcpy(&ndlp->nlp_portname, &sp->portName,
860 		       sizeof(struct lpfc_name));
861 		memcpy(&ndlp->nlp_nodename, &sp->nodeName,
862 		       sizeof(struct lpfc_name));
863 		/* Set state will put ndlp onto node list if not already done */
864 		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
865 		set_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
866 
867 		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
868 		if (!mbox)
869 			goto fail;
870 
871 		lpfc_config_link(phba, mbox);
872 
873 		mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
874 		mbox->vport = vport;
875 		rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
876 		if (rc == MBX_NOT_FINISHED) {
877 			mempool_free(mbox, phba->mbox_mem_pool);
878 			goto fail;
879 		}
880 	} else {
881 		/* This side will wait for the PLOGI. If not registered with
882 		 * a transport, decrement node reference count indicating that
883 		 * ndlp can be released when other references are removed.
884 		 */
885 		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)))
886 			lpfc_nlp_put(ndlp);
887 
888 		/* Start discovery - this should just do CLEAR_LA */
889 		lpfc_disc_start(vport);
890 	}
891 
892 	return 0;
893 fail:
894 	return -ENXIO;
895 }
896 
897 /**
898  * lpfc_cmpl_els_flogi - Completion callback function for flogi
899  * @phba: pointer to lpfc hba data structure.
900  * @cmdiocb: pointer to lpfc command iocb data structure.
901  * @rspiocb: pointer to lpfc response iocb data structure.
902  *
903  * This routine is the top-level completion callback function for issuing
904  * a Fabric Login (FLOGI) command. If the response IOCB reported error,
905  * the lpfc_els_retry() routine shall be invoked to retry the FLOGI. If
906  * retry has been made (either immediately or delayed with lpfc_els_retry()
907  * returning 1), the command IOCB will be released and function returned.
908  * If the retry attempt has been given up (possibly reach the maximum
909  * number of retries), one additional decrement of ndlp reference shall be
910  * invoked before going out after releasing the command IOCB. This will
911  * actually release the remote node (Note, lpfc_els_free_iocb() will also
912  * invoke one decrement of ndlp reference count). If no error reported in
913  * the IOCB status, the command Port ID field is used to determine whether
914  * this is a point-to-point topology or a fabric topology: if the Port ID
915  * field is assigned, it is a fabric topology; otherwise, it is a
916  * point-to-point topology. The routine lpfc_cmpl_els_flogi_fabric() or
917  * lpfc_cmpl_els_flogi_nport() shall be invoked accordingly to handle the
918  * specific topology completion conditions.
919  **/
920 static void
lpfc_cmpl_els_flogi(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)921 lpfc_cmpl_els_flogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
922 		    struct lpfc_iocbq *rspiocb)
923 {
924 	struct lpfc_vport *vport = cmdiocb->vport;
925 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
926 	IOCB_t *irsp;
927 	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf, *prsp;
928 	struct serv_parm *sp;
929 	uint16_t fcf_index;
930 	int rc;
931 	u32 ulp_status, ulp_word4, tmo;
932 	bool flogi_in_retry = false;
933 
934 	/* Check to see if link went down during discovery */
935 	if (lpfc_els_chk_latt(vport)) {
936 		/* One additional decrement on node reference count to
937 		 * trigger the release of the node
938 		 */
939 		if (!(ndlp->fc4_xpt_flags & SCSI_XPT_REGD))
940 			lpfc_nlp_put(ndlp);
941 		goto out;
942 	}
943 
944 	ulp_status = get_job_ulpstatus(phba, rspiocb);
945 	ulp_word4 = get_job_word4(phba, rspiocb);
946 
947 	if (phba->sli_rev == LPFC_SLI_REV4) {
948 		tmo = get_wqe_tmo(cmdiocb);
949 	} else {
950 		irsp = &rspiocb->iocb;
951 		tmo = irsp->ulpTimeout;
952 	}
953 
954 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
955 		"FLOGI cmpl:      status:x%x/x%x state:x%x",
956 		ulp_status, ulp_word4,
957 		vport->port_state);
958 
959 	if (ulp_status) {
960 		/*
961 		 * In case of FIP mode, perform roundrobin FCF failover
962 		 * due to new FCF discovery
963 		 */
964 		if (test_bit(HBA_FIP_SUPPORT, &phba->hba_flag) &&
965 		    (phba->fcf.fcf_flag & FCF_DISCOVERY)) {
966 			if (phba->link_state < LPFC_LINK_UP)
967 				goto stop_rr_fcf_flogi;
968 			if ((phba->fcoe_cvl_eventtag_attn ==
969 			     phba->fcoe_cvl_eventtag) &&
970 			    (ulp_status == IOSTAT_LOCAL_REJECT) &&
971 			    ((ulp_word4 & IOERR_PARAM_MASK) ==
972 			    IOERR_SLI_ABORTED))
973 				goto stop_rr_fcf_flogi;
974 			else
975 				phba->fcoe_cvl_eventtag_attn =
976 					phba->fcoe_cvl_eventtag;
977 			lpfc_printf_log(phba, KERN_WARNING, LOG_FIP | LOG_ELS,
978 					"2611 FLOGI FCF (x%x), "
979 					"status:x%x/x%x, tmo:x%x, perform "
980 					"roundrobin FCF failover\n",
981 					phba->fcf.current_rec.fcf_indx,
982 					ulp_status, ulp_word4, tmo);
983 			lpfc_sli4_set_fcf_flogi_fail(phba,
984 					phba->fcf.current_rec.fcf_indx);
985 			fcf_index = lpfc_sli4_fcf_rr_next_index_get(phba);
986 			rc = lpfc_sli4_fcf_rr_next_proc(vport, fcf_index);
987 			if (rc)
988 				goto out;
989 		}
990 
991 stop_rr_fcf_flogi:
992 		/* FLOGI failure */
993 		if (!(ulp_status == IOSTAT_LOCAL_REJECT &&
994 		      ((ulp_word4 & IOERR_PARAM_MASK) ==
995 					IOERR_LOOP_OPEN_FAILURE)))
996 			lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
997 				      "2858 FLOGI Status:x%x/x%x TMO"
998 				      ":x%x Data x%lx x%x\n",
999 				      ulp_status, ulp_word4, tmo,
1000 				      phba->hba_flag, phba->fcf.fcf_flag);
1001 
1002 		/* Check for retry */
1003 		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
1004 			/* Address a timing race with dev_loss.  If dev_loss
1005 			 * is active on this FPort node, put the initial ref
1006 			 * count back to stop premature node release actions.
1007 			 */
1008 			lpfc_check_nlp_post_devloss(vport, ndlp);
1009 			flogi_in_retry = true;
1010 			goto out;
1011 		}
1012 
1013 		/* The FLOGI will not be retried.  If the FPort node is not
1014 		 * registered with the SCSI transport, remove the initial
1015 		 * reference to trigger node release.
1016 		 */
1017 		if (!test_bit(NLP_IN_DEV_LOSS, &ndlp->nlp_flag) &&
1018 		    !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD))
1019 			lpfc_nlp_put(ndlp);
1020 
1021 		lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
1022 				 "0150 FLOGI Status:x%x/x%x "
1023 				 "xri x%x TMO:x%x refcnt %d\n",
1024 				 ulp_status, ulp_word4, cmdiocb->sli4_xritag,
1025 				 tmo, kref_read(&ndlp->kref));
1026 
1027 		/* If this is not a loop open failure, bail out */
1028 		if (!(ulp_status == IOSTAT_LOCAL_REJECT &&
1029 		      ((ulp_word4 & IOERR_PARAM_MASK) ==
1030 					IOERR_LOOP_OPEN_FAILURE))) {
1031 			/* Warn FLOGI status */
1032 			lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
1033 				      "0100 FLOGI Status:x%x/x%x "
1034 				      "TMO:x%x\n",
1035 				      ulp_status, ulp_word4, tmo);
1036 			goto flogifail;
1037 		}
1038 
1039 		/* FLOGI failed, so there is no fabric */
1040 		clear_bit(FC_FABRIC, &vport->fc_flag);
1041 		clear_bit(FC_PUBLIC_LOOP, &vport->fc_flag);
1042 		clear_bit(FC_PT2PT_NO_NVME, &vport->fc_flag);
1043 
1044 		/* If private loop, then allow max outstanding els to be
1045 		 * LPFC_MAX_DISC_THREADS (32). Scanning in the case of no
1046 		 * alpa map would take too long otherwise.
1047 		 */
1048 		if (phba->alpa_map[0] == 0)
1049 			vport->cfg_discovery_threads = LPFC_MAX_DISC_THREADS;
1050 		if ((phba->sli_rev == LPFC_SLI_REV4) &&
1051 		    (!test_bit(FC_VFI_REGISTERED, &vport->fc_flag) ||
1052 		     (vport->fc_prevDID != vport->fc_myDID) ||
1053 			phba->fc_topology_changed)) {
1054 			if (test_bit(FC_VFI_REGISTERED, &vport->fc_flag)) {
1055 				if (phba->fc_topology_changed) {
1056 					lpfc_unregister_fcf_prep(phba);
1057 					clear_bit(FC_VFI_REGISTERED,
1058 						  &vport->fc_flag);
1059 					phba->fc_topology_changed = 0;
1060 				} else {
1061 					lpfc_sli4_unreg_all_rpis(vport);
1062 				}
1063 			}
1064 
1065 			/* Do not register VFI if the driver aborted FLOGI */
1066 			if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
1067 				lpfc_issue_reg_vfi(vport);
1068 
1069 			goto out;
1070 		}
1071 		goto flogifail;
1072 	}
1073 	clear_bit(FC_VPORT_CVL_RCVD, &vport->fc_flag);
1074 	clear_bit(FC_VPORT_LOGO_RCVD, &vport->fc_flag);
1075 
1076 	/*
1077 	 * The FLOGI succeeded.  Sync the data for the CPU before
1078 	 * accessing it.
1079 	 */
1080 	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
1081 	if (!prsp)
1082 		goto out;
1083 	if (!lpfc_is_els_acc_rsp(prsp))
1084 		goto out;
1085 	sp = prsp->virt + sizeof(uint32_t);
1086 
1087 	/* FLOGI completes successfully */
1088 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1089 			 "0101 FLOGI completes successfully, I/O tag:x%x "
1090 			 "xri x%x Data: x%x x%x x%x x%x x%x x%lx x%x %d\n",
1091 			 cmdiocb->iotag, cmdiocb->sli4_xritag,
1092 			 ulp_word4, sp->cmn.e_d_tov,
1093 			 sp->cmn.w2.r_a_tov, sp->cmn.edtovResolution,
1094 			 vport->port_state, vport->fc_flag,
1095 			 sp->cmn.priority_tagging, kref_read(&ndlp->kref));
1096 
1097 	/* reinitialize the VMID datastructure before returning */
1098 	if (lpfc_is_vmid_enabled(phba)) {
1099 		lpfc_reinit_vmid(vport);
1100 		vport->vmid_flag = 0;
1101 	}
1102 	if (sp->cmn.priority_tagging)
1103 		vport->phba->pport->vmid_flag |= (LPFC_VMID_ISSUE_QFPA |
1104 						  LPFC_VMID_TYPE_PRIO);
1105 
1106 	/*
1107 	 * Address a timing race with dev_loss.  If dev_loss is active on
1108 	 * this FPort node, put the initial ref count back to stop premature
1109 	 * node release actions.
1110 	 */
1111 	lpfc_check_nlp_post_devloss(vport, ndlp);
1112 	if (vport->port_state == LPFC_FLOGI) {
1113 		/*
1114 		 * If Common Service Parameters indicate Nport
1115 		 * we are point to point, if Fport we are Fabric.
1116 		 */
1117 		if (sp->cmn.fPort)
1118 			rc = lpfc_cmpl_els_flogi_fabric(vport, ndlp, sp,
1119 							ulp_word4);
1120 		else if (!test_bit(HBA_FCOE_MODE, &phba->hba_flag))
1121 			rc = lpfc_cmpl_els_flogi_nport(vport, ndlp, sp);
1122 		else {
1123 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1124 				"2831 FLOGI response with cleared Fabric "
1125 				"bit fcf_index 0x%x "
1126 				"Switch Name %02x%02x%02x%02x%02x%02x%02x%02x "
1127 				"Fabric Name "
1128 				"%02x%02x%02x%02x%02x%02x%02x%02x\n",
1129 				phba->fcf.current_rec.fcf_indx,
1130 				phba->fcf.current_rec.switch_name[0],
1131 				phba->fcf.current_rec.switch_name[1],
1132 				phba->fcf.current_rec.switch_name[2],
1133 				phba->fcf.current_rec.switch_name[3],
1134 				phba->fcf.current_rec.switch_name[4],
1135 				phba->fcf.current_rec.switch_name[5],
1136 				phba->fcf.current_rec.switch_name[6],
1137 				phba->fcf.current_rec.switch_name[7],
1138 				phba->fcf.current_rec.fabric_name[0],
1139 				phba->fcf.current_rec.fabric_name[1],
1140 				phba->fcf.current_rec.fabric_name[2],
1141 				phba->fcf.current_rec.fabric_name[3],
1142 				phba->fcf.current_rec.fabric_name[4],
1143 				phba->fcf.current_rec.fabric_name[5],
1144 				phba->fcf.current_rec.fabric_name[6],
1145 				phba->fcf.current_rec.fabric_name[7]);
1146 
1147 			lpfc_nlp_put(ndlp);
1148 			spin_lock_irq(&phba->hbalock);
1149 			phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1150 			spin_unlock_irq(&phba->hbalock);
1151 			clear_bit(FCF_RR_INPROG, &phba->hba_flag);
1152 			clear_bit(HBA_DEVLOSS_TMO, &phba->hba_flag);
1153 			phba->fcf.fcf_redisc_attempted = 0; /* reset */
1154 			goto out;
1155 		}
1156 		if (!rc) {
1157 			/* Mark the FCF discovery process done */
1158 			if (test_bit(HBA_FIP_SUPPORT, &phba->hba_flag))
1159 				lpfc_printf_vlog(vport, KERN_INFO, LOG_FIP |
1160 						LOG_ELS,
1161 						"2769 FLOGI to FCF (x%x) "
1162 						"completed successfully\n",
1163 						phba->fcf.current_rec.fcf_indx);
1164 			spin_lock_irq(&phba->hbalock);
1165 			phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1166 			spin_unlock_irq(&phba->hbalock);
1167 			clear_bit(FCF_RR_INPROG, &phba->hba_flag);
1168 			clear_bit(HBA_DEVLOSS_TMO, &phba->hba_flag);
1169 			phba->fcf.fcf_redisc_attempted = 0; /* reset */
1170 			goto out;
1171 		}
1172 	} else if (vport->port_state > LPFC_FLOGI &&
1173 		   test_bit(FC_PT2PT, &vport->fc_flag)) {
1174 		/*
1175 		 * In a p2p topology, it is possible that discovery has
1176 		 * already progressed, and this completion can be ignored.
1177 		 * Recheck the indicated topology.
1178 		 */
1179 		if (!sp->cmn.fPort)
1180 			goto out;
1181 	}
1182 
1183 flogifail:
1184 	spin_lock_irq(&phba->hbalock);
1185 	phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1186 	spin_unlock_irq(&phba->hbalock);
1187 
1188 	if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
1189 		/* FLOGI failed, so just use loop map to make discovery list */
1190 		lpfc_disc_list_loopmap(vport);
1191 
1192 		/* Start discovery */
1193 		lpfc_disc_start(vport);
1194 	} else if (((ulp_status != IOSTAT_LOCAL_REJECT) ||
1195 			(((ulp_word4 & IOERR_PARAM_MASK) !=
1196 			 IOERR_SLI_ABORTED) &&
1197 			((ulp_word4 & IOERR_PARAM_MASK) !=
1198 			 IOERR_SLI_DOWN))) &&
1199 			(phba->link_state != LPFC_CLEAR_LA)) {
1200 		/* If FLOGI failed enable link interrupt. */
1201 		lpfc_issue_clear_la(phba, vport);
1202 	}
1203 out:
1204 	if (!flogi_in_retry)
1205 		clear_bit(HBA_FLOGI_OUTSTANDING, &phba->hba_flag);
1206 
1207 	lpfc_els_free_iocb(phba, cmdiocb);
1208 	lpfc_nlp_put(ndlp);
1209 }
1210 
1211 /**
1212  * lpfc_cmpl_els_link_down - Completion callback function for ELS command
1213  *                           aborted during a link down
1214  * @phba: pointer to lpfc hba data structure.
1215  * @cmdiocb: pointer to lpfc command iocb data structure.
1216  * @rspiocb: pointer to lpfc response iocb data structure.
1217  *
1218  */
1219 static void
lpfc_cmpl_els_link_down(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)1220 lpfc_cmpl_els_link_down(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1221 			struct lpfc_iocbq *rspiocb)
1222 {
1223 	uint32_t *pcmd;
1224 	uint32_t cmd;
1225 	u32 ulp_status, ulp_word4;
1226 
1227 	pcmd = (uint32_t *)cmdiocb->cmd_dmabuf->virt;
1228 	cmd = *pcmd;
1229 
1230 	ulp_status = get_job_ulpstatus(phba, rspiocb);
1231 	ulp_word4 = get_job_word4(phba, rspiocb);
1232 
1233 	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
1234 			"6445 ELS completes after LINK_DOWN: "
1235 			" Status %x/%x cmd x%x flg x%x iotag x%x\n",
1236 			ulp_status, ulp_word4, cmd,
1237 			cmdiocb->cmd_flag, cmdiocb->iotag);
1238 
1239 	if (cmdiocb->cmd_flag & LPFC_IO_FABRIC) {
1240 		cmdiocb->cmd_flag &= ~LPFC_IO_FABRIC;
1241 		atomic_dec(&phba->fabric_iocb_count);
1242 	}
1243 	lpfc_els_free_iocb(phba, cmdiocb);
1244 }
1245 
1246 /**
1247  * lpfc_issue_els_flogi - Issue an flogi iocb command for a vport
1248  * @vport: pointer to a host virtual N_Port data structure.
1249  * @ndlp: pointer to a node-list data structure.
1250  * @retry: number of retries to the command IOCB.
1251  *
1252  * This routine issues a Fabric Login (FLOGI) Request ELS command
1253  * for a @vport. The initiator service parameters are put into the payload
1254  * of the FLOGI Request IOCB and the top-level callback function pointer
1255  * to lpfc_cmpl_els_flogi() routine is put to the IOCB completion callback
1256  * function field. The lpfc_issue_fabric_iocb routine is invoked to send
1257  * out FLOGI ELS command with one outstanding fabric IOCB at a time.
1258  *
1259  * Note that the ndlp reference count will be incremented by 1 for holding the
1260  * ndlp and the reference to ndlp will be stored into the ndlp field of
1261  * the IOCB for the completion callback function to the FLOGI ELS command.
1262  *
1263  * Return code
1264  *   0 - successfully issued flogi iocb for @vport
1265  *   1 - failed to issue flogi iocb for @vport
1266  **/
1267 static int
lpfc_issue_els_flogi(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,uint8_t retry)1268 lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1269 		     uint8_t retry)
1270 {
1271 	struct lpfc_hba  *phba = vport->phba;
1272 	struct serv_parm *sp;
1273 	union lpfc_wqe128 *wqe = NULL;
1274 	IOCB_t *icmd = NULL;
1275 	struct lpfc_iocbq *elsiocb;
1276 	struct lpfc_iocbq defer_flogi_acc;
1277 	u8 *pcmd, ct;
1278 	uint16_t cmdsize;
1279 	uint32_t tmo, did;
1280 	int rc;
1281 
1282 	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
1283 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
1284 				     ndlp->nlp_DID, ELS_CMD_FLOGI);
1285 
1286 	if (!elsiocb)
1287 		return 1;
1288 
1289 	wqe = &elsiocb->wqe;
1290 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
1291 	icmd = &elsiocb->iocb;
1292 
1293 	/* For FLOGI request, remainder of payload is service parameters */
1294 	*((uint32_t *) (pcmd)) = ELS_CMD_FLOGI;
1295 	pcmd += sizeof(uint32_t);
1296 	memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
1297 	sp = (struct serv_parm *) pcmd;
1298 
1299 	/* Setup CSPs accordingly for Fabric */
1300 	sp->cmn.e_d_tov = 0;
1301 	sp->cmn.w2.r_a_tov = 0;
1302 	sp->cmn.virtual_fabric_support = 0;
1303 	sp->cls1.classValid = 0;
1304 	if (sp->cmn.fcphLow < FC_PH3)
1305 		sp->cmn.fcphLow = FC_PH3;
1306 	if (sp->cmn.fcphHigh < FC_PH3)
1307 		sp->cmn.fcphHigh = FC_PH3;
1308 
1309 	/* Determine if switch supports priority tagging */
1310 	if (phba->cfg_vmid_priority_tagging) {
1311 		sp->cmn.priority_tagging = 1;
1312 		/* lpfc_vmid_host_uuid is combination of wwpn and wwnn */
1313 		if (!memchr_inv(vport->lpfc_vmid_host_uuid, 0,
1314 				sizeof(vport->lpfc_vmid_host_uuid))) {
1315 			memcpy(vport->lpfc_vmid_host_uuid, phba->wwpn,
1316 			       sizeof(phba->wwpn));
1317 			memcpy(&vport->lpfc_vmid_host_uuid[8], phba->wwnn,
1318 			       sizeof(phba->wwnn));
1319 		}
1320 	}
1321 
1322 	if  (phba->sli_rev == LPFC_SLI_REV4) {
1323 		if (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) ==
1324 		    LPFC_SLI_INTF_IF_TYPE_0) {
1325 			/* FLOGI needs to be 3 for WQE FCFI */
1326 			ct = SLI4_CT_FCFI;
1327 			bf_set(wqe_ct, &wqe->els_req.wqe_com, ct);
1328 
1329 			/* Set the fcfi to the fcfi we registered with */
1330 			bf_set(wqe_ctxt_tag, &wqe->els_req.wqe_com,
1331 			       phba->fcf.fcfi);
1332 		}
1333 
1334 		/* Can't do SLI4 class2 without support sequence coalescing */
1335 		sp->cls2.classValid = 0;
1336 		sp->cls2.seqDelivery = 0;
1337 	} else {
1338 		/* Historical, setting sequential-delivery bit for SLI3 */
1339 		sp->cls2.seqDelivery = (sp->cls2.classValid) ? 1 : 0;
1340 		sp->cls3.seqDelivery = (sp->cls3.classValid) ? 1 : 0;
1341 		if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
1342 			sp->cmn.request_multiple_Nport = 1;
1343 			/* For FLOGI, Let FLOGI rsp set the NPortID for VPI 0 */
1344 			icmd->ulpCt_h = 1;
1345 			icmd->ulpCt_l = 0;
1346 		} else {
1347 			sp->cmn.request_multiple_Nport = 0;
1348 		}
1349 
1350 		if (phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
1351 			icmd->un.elsreq64.myID = 0;
1352 			icmd->un.elsreq64.fl = 1;
1353 		}
1354 	}
1355 
1356 	tmo = phba->fc_ratov;
1357 	phba->fc_ratov = LPFC_DISC_FLOGI_TMO;
1358 	lpfc_set_disctmo(vport);
1359 	phba->fc_ratov = tmo;
1360 
1361 	phba->fc_stat.elsXmitFLOGI++;
1362 	elsiocb->cmd_cmpl = lpfc_cmpl_els_flogi;
1363 
1364 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1365 		"Issue FLOGI:     opt:x%x",
1366 		phba->sli3_options, 0, 0);
1367 
1368 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
1369 	if (!elsiocb->ndlp) {
1370 		lpfc_els_free_iocb(phba, elsiocb);
1371 		return 1;
1372 	}
1373 
1374 	/* Avoid race with FLOGI completion and hba_flags. */
1375 	set_bit(HBA_FLOGI_ISSUED, &phba->hba_flag);
1376 	set_bit(HBA_FLOGI_OUTSTANDING, &phba->hba_flag);
1377 
1378 	rc = lpfc_issue_fabric_iocb(phba, elsiocb);
1379 	if (rc == IOCB_ERROR) {
1380 		clear_bit(HBA_FLOGI_ISSUED, &phba->hba_flag);
1381 		clear_bit(HBA_FLOGI_OUTSTANDING, &phba->hba_flag);
1382 		lpfc_els_free_iocb(phba, elsiocb);
1383 		lpfc_nlp_put(ndlp);
1384 		return 1;
1385 	}
1386 
1387 	/* Clear external loopback plug detected flag */
1388 	phba->link_flag &= ~LS_EXTERNAL_LOOPBACK;
1389 
1390 	/* Check for a deferred FLOGI ACC condition */
1391 	if (phba->defer_flogi_acc.flag) {
1392 		/* lookup ndlp for received FLOGI */
1393 		ndlp = lpfc_findnode_did(vport, 0);
1394 		if (!ndlp)
1395 			return 0;
1396 
1397 		did = vport->fc_myDID;
1398 		vport->fc_myDID = Fabric_DID;
1399 
1400 		memset(&defer_flogi_acc, 0, sizeof(struct lpfc_iocbq));
1401 
1402 		if (phba->sli_rev == LPFC_SLI_REV4) {
1403 			bf_set(wqe_ctxt_tag,
1404 			       &defer_flogi_acc.wqe.xmit_els_rsp.wqe_com,
1405 			       phba->defer_flogi_acc.rx_id);
1406 			bf_set(wqe_rcvoxid,
1407 			       &defer_flogi_acc.wqe.xmit_els_rsp.wqe_com,
1408 			       phba->defer_flogi_acc.ox_id);
1409 		} else {
1410 			icmd = &defer_flogi_acc.iocb;
1411 			icmd->ulpContext = phba->defer_flogi_acc.rx_id;
1412 			icmd->unsli3.rcvsli3.ox_id =
1413 				phba->defer_flogi_acc.ox_id;
1414 		}
1415 
1416 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1417 				 "3354 Xmit deferred FLOGI ACC: rx_id: x%x,"
1418 				 " ox_id: x%x, hba_flag x%lx\n",
1419 				 phba->defer_flogi_acc.rx_id,
1420 				 phba->defer_flogi_acc.ox_id, phba->hba_flag);
1421 
1422 		/* Send deferred FLOGI ACC */
1423 		lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, &defer_flogi_acc,
1424 				 ndlp, NULL);
1425 
1426 		phba->defer_flogi_acc.flag = false;
1427 
1428 		/* Decrement the held ndlp that was incremented when the
1429 		 * deferred flogi acc flag was set.
1430 		 */
1431 		if (phba->defer_flogi_acc.ndlp) {
1432 			lpfc_nlp_put(phba->defer_flogi_acc.ndlp);
1433 			phba->defer_flogi_acc.ndlp = NULL;
1434 		}
1435 
1436 		vport->fc_myDID = did;
1437 	}
1438 
1439 	return 0;
1440 }
1441 
1442 /**
1443  * lpfc_els_abort_flogi - Abort all outstanding flogi iocbs
1444  * @phba: pointer to lpfc hba data structure.
1445  *
1446  * This routine aborts all the outstanding Fabric Login (FLOGI) IOCBs
1447  * with a @phba. This routine walks all the outstanding IOCBs on the txcmplq
1448  * list and issues an abort IOCB commond on each outstanding IOCB that
1449  * contains a active Fabric_DID ndlp. Note that this function is to issue
1450  * the abort IOCB command on all the outstanding IOCBs, thus when this
1451  * function returns, it does not guarantee all the IOCBs are actually aborted.
1452  *
1453  * Return code
1454  *   0 - Successfully issued abort iocb on all outstanding flogis (Always 0)
1455  **/
1456 int
lpfc_els_abort_flogi(struct lpfc_hba * phba)1457 lpfc_els_abort_flogi(struct lpfc_hba *phba)
1458 {
1459 	struct lpfc_sli_ring *pring;
1460 	struct lpfc_iocbq *iocb, *next_iocb;
1461 	struct lpfc_nodelist *ndlp;
1462 	u32 ulp_command;
1463 
1464 	/* Abort outstanding I/O on NPort <nlp_DID> */
1465 	lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
1466 			"0201 Abort outstanding I/O on NPort x%x\n",
1467 			Fabric_DID);
1468 
1469 	pring = lpfc_phba_elsring(phba);
1470 	if (unlikely(!pring))
1471 		return -EIO;
1472 
1473 	/*
1474 	 * Check the txcmplq for an iocb that matches the nport the driver is
1475 	 * searching for.
1476 	 */
1477 	spin_lock_irq(&phba->hbalock);
1478 	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
1479 		ulp_command = get_job_cmnd(phba, iocb);
1480 		if (ulp_command == CMD_ELS_REQUEST64_CR) {
1481 			ndlp = iocb->ndlp;
1482 			if (ndlp && ndlp->nlp_DID == Fabric_DID) {
1483 				if (test_bit(FC_PT2PT, &phba->pport->fc_flag) &&
1484 				    !test_bit(FC_PT2PT_PLOGI,
1485 					      &phba->pport->fc_flag))
1486 					iocb->fabric_cmd_cmpl =
1487 						lpfc_ignore_els_cmpl;
1488 				lpfc_sli_issue_abort_iotag(phba, pring, iocb,
1489 							   NULL);
1490 			}
1491 		}
1492 	}
1493 	/* Make sure HBA is alive */
1494 	lpfc_issue_hb_tmo(phba);
1495 
1496 	spin_unlock_irq(&phba->hbalock);
1497 
1498 	return 0;
1499 }
1500 
1501 /**
1502  * lpfc_initial_flogi - Issue an initial fabric login for a vport
1503  * @vport: pointer to a host virtual N_Port data structure.
1504  *
1505  * This routine issues an initial Fabric Login (FLOGI) for the @vport
1506  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1507  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1508  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1509  * it will just be enabled and made active. The lpfc_issue_els_flogi() routine
1510  * is then invoked with the @vport and the ndlp to perform the FLOGI for the
1511  * @vport.
1512  *
1513  * Return code
1514  *   0 - failed to issue initial flogi for @vport
1515  *   1 - successfully issued initial flogi for @vport
1516  **/
1517 int
lpfc_initial_flogi(struct lpfc_vport * vport)1518 lpfc_initial_flogi(struct lpfc_vport *vport)
1519 {
1520 	struct lpfc_nodelist *ndlp;
1521 
1522 	vport->port_state = LPFC_FLOGI;
1523 	lpfc_set_disctmo(vport);
1524 
1525 	/* First look for the Fabric ndlp */
1526 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
1527 	if (!ndlp) {
1528 		/* Cannot find existing Fabric ndlp, so allocate a new one */
1529 		ndlp = lpfc_nlp_init(vport, Fabric_DID);
1530 		if (!ndlp)
1531 			return 0;
1532 		/* Set the node type */
1533 		ndlp->nlp_type |= NLP_FABRIC;
1534 
1535 		/* Put ndlp onto node list */
1536 		lpfc_enqueue_node(vport, ndlp);
1537 	}
1538 
1539 	/* Reset the Fabric flag, topology change may have happened */
1540 	clear_bit(FC_FABRIC, &vport->fc_flag);
1541 	if (lpfc_issue_els_flogi(vport, ndlp, 0)) {
1542 		/* A node reference should be retained while registered with a
1543 		 * transport or dev-loss-evt work is pending.
1544 		 * Otherwise, decrement node reference to trigger release.
1545 		 */
1546 		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
1547 		    !test_bit(NLP_IN_DEV_LOSS, &ndlp->nlp_flag))
1548 			lpfc_nlp_put(ndlp);
1549 		return 0;
1550 	}
1551 	return 1;
1552 }
1553 
1554 /**
1555  * lpfc_initial_fdisc - Issue an initial fabric discovery for a vport
1556  * @vport: pointer to a host virtual N_Port data structure.
1557  *
1558  * This routine issues an initial Fabric Discover (FDISC) for the @vport
1559  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1560  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1561  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1562  * it will just be enabled and made active. The lpfc_issue_els_fdisc() routine
1563  * is then invoked with the @vport and the ndlp to perform the FDISC for the
1564  * @vport.
1565  *
1566  * Return code
1567  *   0 - failed to issue initial fdisc for @vport
1568  *   1 - successfully issued initial fdisc for @vport
1569  **/
1570 int
lpfc_initial_fdisc(struct lpfc_vport * vport)1571 lpfc_initial_fdisc(struct lpfc_vport *vport)
1572 {
1573 	struct lpfc_nodelist *ndlp;
1574 
1575 	/* First look for the Fabric ndlp */
1576 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
1577 	if (!ndlp) {
1578 		/* Cannot find existing Fabric ndlp, so allocate a new one */
1579 		ndlp = lpfc_nlp_init(vport, Fabric_DID);
1580 		if (!ndlp)
1581 			return 0;
1582 
1583 		/* NPIV is only supported in Fabrics. */
1584 		ndlp->nlp_type |= NLP_FABRIC;
1585 
1586 		/* Put ndlp onto node list */
1587 		lpfc_enqueue_node(vport, ndlp);
1588 	}
1589 
1590 	if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
1591 		/* A node reference should be retained while registered with a
1592 		 * transport or dev-loss-evt work is pending.
1593 		 * Otherwise, decrement node reference to trigger release.
1594 		 */
1595 		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
1596 		    !test_bit(NLP_IN_DEV_LOSS, &ndlp->nlp_flag))
1597 			lpfc_nlp_put(ndlp);
1598 		return 0;
1599 	}
1600 	return 1;
1601 }
1602 
1603 /**
1604  * lpfc_more_plogi - Check and issue remaining plogis for a vport
1605  * @vport: pointer to a host virtual N_Port data structure.
1606  *
1607  * This routine checks whether there are more remaining Port Logins
1608  * (PLOGI) to be issued for the @vport. If so, it will invoke the routine
1609  * lpfc_els_disc_plogi() to go through the Node Port Recovery (NPR) nodes
1610  * to issue ELS PLOGIs up to the configured discover threads with the
1611  * @vport (@vport->cfg_discovery_threads). The function also decrement
1612  * the @vport's num_disc_node by 1 if it is not already 0.
1613  **/
1614 void
lpfc_more_plogi(struct lpfc_vport * vport)1615 lpfc_more_plogi(struct lpfc_vport *vport)
1616 {
1617 	if (vport->num_disc_nodes)
1618 		vport->num_disc_nodes--;
1619 
1620 	/* Continue discovery with <num_disc_nodes> PLOGIs to go */
1621 	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1622 			 "0232 Continue discovery with %d PLOGIs to go "
1623 			 "Data: x%x x%lx x%x\n",
1624 			 vport->num_disc_nodes,
1625 			 atomic_read(&vport->fc_plogi_cnt),
1626 			 vport->fc_flag, vport->port_state);
1627 	/* Check to see if there are more PLOGIs to be sent */
1628 	if (test_bit(FC_NLP_MORE, &vport->fc_flag))
1629 		/* go thru NPR nodes and issue any remaining ELS PLOGIs */
1630 		lpfc_els_disc_plogi(vport);
1631 
1632 	return;
1633 }
1634 
1635 /**
1636  * lpfc_plogi_confirm_nport - Confirm plogi wwpn matches stored ndlp
1637  * @phba: pointer to lpfc hba data structure.
1638  * @prsp: pointer to response IOCB payload.
1639  * @ndlp: pointer to a node-list data structure.
1640  *
1641  * This routine checks and indicates whether the WWPN of an N_Port, retrieved
1642  * from a PLOGI, matches the WWPN that is stored in the @ndlp for that N_POrt.
1643  * The following cases are considered N_Port confirmed:
1644  * 1) The N_Port is a Fabric ndlp; 2) The @ndlp is on vport list and matches
1645  * the WWPN of the N_Port logged into; 3) The @ndlp is not on vport list but
1646  * it does not have WWPN assigned either. If the WWPN is confirmed, the
1647  * pointer to the @ndlp will be returned. If the WWPN is not confirmed:
1648  * 1) if there is a node on vport list other than the @ndlp with the same
1649  * WWPN of the N_Port PLOGI logged into, the lpfc_unreg_rpi() will be invoked
1650  * on that node to release the RPI associated with the node; 2) if there is
1651  * no node found on vport list with the same WWPN of the N_Port PLOGI logged
1652  * into, a new node shall be allocated (or activated). In either case, the
1653  * parameters of the @ndlp shall be copied to the new_ndlp, the @ndlp shall
1654  * be released and the new_ndlp shall be put on to the vport node list and
1655  * its pointer returned as the confirmed node.
1656  *
1657  * Note that before the @ndlp got "released", the keepDID from not-matching
1658  * or inactive "new_ndlp" on the vport node list is assigned to the nlp_DID
1659  * of the @ndlp. This is because the release of @ndlp is actually to put it
1660  * into an inactive state on the vport node list and the vport node list
1661  * management algorithm does not allow two node with a same DID.
1662  *
1663  * Return code
1664  *   pointer to the PLOGI N_Port @ndlp
1665  **/
1666 static struct lpfc_nodelist *
lpfc_plogi_confirm_nport(struct lpfc_hba * phba,uint32_t * prsp,struct lpfc_nodelist * ndlp)1667 lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
1668 			 struct lpfc_nodelist *ndlp)
1669 {
1670 	struct lpfc_vport *vport = ndlp->vport;
1671 	struct lpfc_nodelist *new_ndlp;
1672 	struct serv_parm *sp;
1673 	uint8_t  name[sizeof(struct lpfc_name)];
1674 	uint32_t keepDID = 0;
1675 	int rc;
1676 	unsigned long keep_nlp_flag = 0, keep_new_nlp_flag = 0;
1677 	uint16_t keep_nlp_state;
1678 	u32 keep_nlp_fc4_type = 0;
1679 	struct lpfc_nvme_rport *keep_nrport = NULL;
1680 	unsigned long *active_rrqs_xri_bitmap = NULL;
1681 
1682 	sp = (struct serv_parm *) ((uint8_t *) prsp + sizeof(uint32_t));
1683 	memset(name, 0, sizeof(struct lpfc_name));
1684 
1685 	/* Now we find out if the NPort we are logging into, matches the WWPN
1686 	 * we have for that ndlp. If not, we have some work to do.
1687 	 */
1688 	new_ndlp = lpfc_findnode_wwpn(vport, &sp->portName);
1689 
1690 	/* return immediately if the WWPN matches ndlp */
1691 	if (new_ndlp == ndlp)
1692 		return ndlp;
1693 
1694 	if (phba->sli_rev == LPFC_SLI_REV4) {
1695 		active_rrqs_xri_bitmap = mempool_alloc(phba->active_rrq_pool,
1696 						       GFP_KERNEL);
1697 		if (active_rrqs_xri_bitmap)
1698 			memset(active_rrqs_xri_bitmap, 0,
1699 			       phba->cfg_rrq_xri_bitmap_sz);
1700 	}
1701 
1702 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1703 			 "3178 PLOGI confirm: ndlp x%x x%lx x%x: "
1704 			 "new_ndlp x%x x%lx x%x\n",
1705 			 ndlp->nlp_DID, ndlp->nlp_flag,  ndlp->nlp_fc4_type,
1706 			 (new_ndlp ? new_ndlp->nlp_DID : 0),
1707 			 (new_ndlp ? new_ndlp->nlp_flag : 0),
1708 			 (new_ndlp ? new_ndlp->nlp_fc4_type : 0));
1709 
1710 	if (!new_ndlp) {
1711 		rc = memcmp(&ndlp->nlp_portname, name,
1712 			    sizeof(struct lpfc_name));
1713 		if (!rc) {
1714 			if (active_rrqs_xri_bitmap)
1715 				mempool_free(active_rrqs_xri_bitmap,
1716 					     phba->active_rrq_pool);
1717 			return ndlp;
1718 		}
1719 		new_ndlp = lpfc_nlp_init(vport, ndlp->nlp_DID);
1720 		if (!new_ndlp) {
1721 			if (active_rrqs_xri_bitmap)
1722 				mempool_free(active_rrqs_xri_bitmap,
1723 					     phba->active_rrq_pool);
1724 			return ndlp;
1725 		}
1726 	} else {
1727 		if (phba->sli_rev == LPFC_SLI_REV4 &&
1728 		    active_rrqs_xri_bitmap)
1729 			memcpy(active_rrqs_xri_bitmap,
1730 			       new_ndlp->active_rrqs_xri_bitmap,
1731 			       phba->cfg_rrq_xri_bitmap_sz);
1732 
1733 		/*
1734 		 * Unregister from backend if not done yet. Could have been
1735 		 * skipped due to ADISC
1736 		 */
1737 		lpfc_nlp_unreg_node(vport, new_ndlp);
1738 	}
1739 
1740 	keepDID = new_ndlp->nlp_DID;
1741 
1742 	/* At this point in this routine, we know new_ndlp will be
1743 	 * returned. however, any previous GID_FTs that were done
1744 	 * would have updated nlp_fc4_type in ndlp, so we must ensure
1745 	 * new_ndlp has the right value.
1746 	 */
1747 	if (test_bit(FC_FABRIC, &vport->fc_flag)) {
1748 		keep_nlp_fc4_type = new_ndlp->nlp_fc4_type;
1749 		new_ndlp->nlp_fc4_type = ndlp->nlp_fc4_type;
1750 	}
1751 
1752 	lpfc_unreg_rpi(vport, new_ndlp);
1753 	new_ndlp->nlp_DID = ndlp->nlp_DID;
1754 	new_ndlp->nlp_prev_state = ndlp->nlp_prev_state;
1755 	if (phba->sli_rev == LPFC_SLI_REV4)
1756 		memcpy(new_ndlp->active_rrqs_xri_bitmap,
1757 		       ndlp->active_rrqs_xri_bitmap,
1758 		       phba->cfg_rrq_xri_bitmap_sz);
1759 
1760 	/* Lock both ndlps */
1761 	spin_lock_irq(&ndlp->lock);
1762 	spin_lock_irq(&new_ndlp->lock);
1763 	keep_new_nlp_flag = new_ndlp->nlp_flag;
1764 	keep_nlp_flag = ndlp->nlp_flag;
1765 	new_ndlp->nlp_flag = ndlp->nlp_flag;
1766 
1767 	/* if new_ndlp had NLP_UNREG_INP set, keep it */
1768 	if (test_bit(NLP_UNREG_INP, &keep_new_nlp_flag))
1769 		set_bit(NLP_UNREG_INP, &new_ndlp->nlp_flag);
1770 	else
1771 		clear_bit(NLP_UNREG_INP, &new_ndlp->nlp_flag);
1772 
1773 	/* if new_ndlp had NLP_RPI_REGISTERED set, keep it */
1774 	if (test_bit(NLP_RPI_REGISTERED, &keep_new_nlp_flag))
1775 		set_bit(NLP_RPI_REGISTERED, &new_ndlp->nlp_flag);
1776 	else
1777 		clear_bit(NLP_RPI_REGISTERED, &new_ndlp->nlp_flag);
1778 
1779 	/*
1780 	 * Retain the DROPPED flag. This will take care of the init
1781 	 * refcount when affecting the state change
1782 	 */
1783 	if (test_bit(NLP_DROPPED, &keep_new_nlp_flag))
1784 		set_bit(NLP_DROPPED, &new_ndlp->nlp_flag);
1785 	else
1786 		clear_bit(NLP_DROPPED, &new_ndlp->nlp_flag);
1787 
1788 	ndlp->nlp_flag = keep_new_nlp_flag;
1789 
1790 	/* if ndlp had NLP_UNREG_INP set, keep it */
1791 	if (test_bit(NLP_UNREG_INP, &keep_nlp_flag))
1792 		set_bit(NLP_UNREG_INP, &ndlp->nlp_flag);
1793 	else
1794 		clear_bit(NLP_UNREG_INP, &ndlp->nlp_flag);
1795 
1796 	/* if ndlp had NLP_RPI_REGISTERED set, keep it */
1797 	if (test_bit(NLP_RPI_REGISTERED, &keep_nlp_flag))
1798 		set_bit(NLP_RPI_REGISTERED, &ndlp->nlp_flag);
1799 	else
1800 		clear_bit(NLP_RPI_REGISTERED, &ndlp->nlp_flag);
1801 
1802 	/*
1803 	 * Retain the DROPPED flag. This will take care of the init
1804 	 * refcount when affecting the state change
1805 	 */
1806 	if (test_bit(NLP_DROPPED, &keep_nlp_flag))
1807 		set_bit(NLP_DROPPED, &ndlp->nlp_flag);
1808 	else
1809 		clear_bit(NLP_DROPPED, &ndlp->nlp_flag);
1810 
1811 	spin_unlock_irq(&new_ndlp->lock);
1812 	spin_unlock_irq(&ndlp->lock);
1813 
1814 	/* Set nlp_states accordingly */
1815 	keep_nlp_state = new_ndlp->nlp_state;
1816 	lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
1817 
1818 	/* interchange the nvme remoteport structs */
1819 	keep_nrport = new_ndlp->nrport;
1820 	new_ndlp->nrport = ndlp->nrport;
1821 
1822 	/* Move this back to NPR state */
1823 	if (memcmp(&ndlp->nlp_portname, name, sizeof(struct lpfc_name)) == 0) {
1824 		/* The ndlp doesn't have a portname yet, but does have an
1825 		 * NPort ID.  The new_ndlp portname matches the Rport's
1826 		 * portname.  Reinstantiate the new_ndlp and reset the ndlp.
1827 		 */
1828 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1829 			 "3179 PLOGI confirm NEW: %x %x\n",
1830 			 new_ndlp->nlp_DID, keepDID);
1831 
1832 		/* Two ndlps cannot have the same did on the nodelist.
1833 		 * The KeepDID and keep_nlp_fc4_type need to be swapped
1834 		 * because ndlp is inflight with no WWPN.
1835 		 */
1836 		ndlp->nlp_DID = keepDID;
1837 		ndlp->nlp_fc4_type = keep_nlp_fc4_type;
1838 		lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1839 		if (phba->sli_rev == LPFC_SLI_REV4 &&
1840 		    active_rrqs_xri_bitmap)
1841 			memcpy(ndlp->active_rrqs_xri_bitmap,
1842 			       active_rrqs_xri_bitmap,
1843 			       phba->cfg_rrq_xri_bitmap_sz);
1844 
1845 	} else {
1846 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1847 			 "3180 PLOGI confirm SWAP: %x %x\n",
1848 			 new_ndlp->nlp_DID, keepDID);
1849 
1850 		lpfc_unreg_rpi(vport, ndlp);
1851 
1852 		/* The ndlp and new_ndlp both have WWPNs but are swapping
1853 		 * NPort Ids and attributes.
1854 		 */
1855 		ndlp->nlp_DID = keepDID;
1856 		ndlp->nlp_fc4_type = keep_nlp_fc4_type;
1857 
1858 		if (phba->sli_rev == LPFC_SLI_REV4 &&
1859 		    active_rrqs_xri_bitmap)
1860 			memcpy(ndlp->active_rrqs_xri_bitmap,
1861 			       active_rrqs_xri_bitmap,
1862 			       phba->cfg_rrq_xri_bitmap_sz);
1863 
1864 		/* Since we are switching over to the new_ndlp,
1865 		 * reset the old ndlp state
1866 		 */
1867 		if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
1868 		    (ndlp->nlp_state == NLP_STE_MAPPED_NODE))
1869 			keep_nlp_state = NLP_STE_NPR_NODE;
1870 		lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1871 		ndlp->nrport = keep_nrport;
1872 	}
1873 
1874 	/*
1875 	 * If ndlp is not associated with any rport we can drop it here else
1876 	 * let dev_loss_tmo_callbk trigger DEVICE_RM event
1877 	 */
1878 	if (!ndlp->rport && (ndlp->nlp_state == NLP_STE_NPR_NODE))
1879 		lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
1880 
1881 	if (phba->sli_rev == LPFC_SLI_REV4 &&
1882 	    active_rrqs_xri_bitmap)
1883 		mempool_free(active_rrqs_xri_bitmap,
1884 			     phba->active_rrq_pool);
1885 
1886 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1887 			 "3173 PLOGI confirm exit: new_ndlp x%x x%lx x%x\n",
1888 			 new_ndlp->nlp_DID, new_ndlp->nlp_flag,
1889 			 new_ndlp->nlp_fc4_type);
1890 
1891 	return new_ndlp;
1892 }
1893 
1894 /**
1895  * lpfc_end_rscn - Check and handle more rscn for a vport
1896  * @vport: pointer to a host virtual N_Port data structure.
1897  *
1898  * This routine checks whether more Registration State Change
1899  * Notifications (RSCNs) came in while the discovery state machine was in
1900  * the FC_RSCN_MODE. If so, the lpfc_els_handle_rscn() routine will be
1901  * invoked to handle the additional RSCNs for the @vport. Otherwise, the
1902  * FC_RSCN_MODE bit will be cleared with the @vport to mark as the end of
1903  * handling the RSCNs.
1904  **/
1905 void
lpfc_end_rscn(struct lpfc_vport * vport)1906 lpfc_end_rscn(struct lpfc_vport *vport)
1907 {
1908 
1909 	if (test_bit(FC_RSCN_MODE, &vport->fc_flag)) {
1910 		/*
1911 		 * Check to see if more RSCNs came in while we were
1912 		 * processing this one.
1913 		 */
1914 		if (vport->fc_rscn_id_cnt ||
1915 		    test_bit(FC_RSCN_DISCOVERY, &vport->fc_flag))
1916 			lpfc_els_handle_rscn(vport);
1917 		else
1918 			clear_bit(FC_RSCN_MODE, &vport->fc_flag);
1919 	}
1920 }
1921 
1922 /**
1923  * lpfc_cmpl_els_rrq - Completion handled for els RRQs.
1924  * @phba: pointer to lpfc hba data structure.
1925  * @cmdiocb: pointer to lpfc command iocb data structure.
1926  * @rspiocb: pointer to lpfc response iocb data structure.
1927  *
1928  * This routine will call the clear rrq function to free the rrq and
1929  * clear the xri's bit in the ndlp's xri_bitmap. If the ndlp does not
1930  * exist then the clear_rrq is still called because the rrq needs to
1931  * be freed.
1932  **/
1933 
1934 static void
lpfc_cmpl_els_rrq(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)1935 lpfc_cmpl_els_rrq(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1936 		  struct lpfc_iocbq *rspiocb)
1937 {
1938 	struct lpfc_vport *vport = cmdiocb->vport;
1939 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
1940 	struct lpfc_node_rrq *rrq;
1941 	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
1942 	u32 ulp_word4 = get_job_word4(phba, rspiocb);
1943 
1944 	/* we pass cmdiocb to state machine which needs rspiocb as well */
1945 	rrq = cmdiocb->context_un.rrq;
1946 	cmdiocb->rsp_iocb = rspiocb;
1947 
1948 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1949 		"RRQ cmpl:      status:x%x/x%x did:x%x",
1950 		ulp_status, ulp_word4,
1951 		get_job_els_rsp64_did(phba, cmdiocb));
1952 
1953 
1954 	/* rrq completes to NPort <nlp_DID> */
1955 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1956 			 "2880 RRQ completes to DID x%x "
1957 			 "Data: x%x x%x x%x x%x x%x\n",
1958 			 ndlp->nlp_DID, ulp_status, ulp_word4,
1959 			 get_wqe_tmo(cmdiocb), rrq->xritag, rrq->rxid);
1960 
1961 	if (ulp_status) {
1962 		/* Check for retry */
1963 		/* Warn RRQ status Don't print the vport to vport rjts */
1964 		if (ulp_status != IOSTAT_LS_RJT ||
1965 		    (((ulp_word4) >> 16 != LSRJT_INVALID_CMD) &&
1966 		     ((ulp_word4) >> 16 != LSRJT_UNABLE_TPC)) ||
1967 		    (phba)->pport->cfg_log_verbose & LOG_ELS)
1968 			lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
1969 				      "2881 RRQ DID:%06X Status:"
1970 				      "x%x/x%x\n",
1971 				      ndlp->nlp_DID, ulp_status,
1972 				      ulp_word4);
1973 	}
1974 
1975 	lpfc_clr_rrq_active(phba, rrq->xritag, rrq);
1976 	lpfc_els_free_iocb(phba, cmdiocb);
1977 	lpfc_nlp_put(ndlp);
1978 	return;
1979 }
1980 /**
1981  * lpfc_cmpl_els_plogi - Completion callback function for plogi
1982  * @phba: pointer to lpfc hba data structure.
1983  * @cmdiocb: pointer to lpfc command iocb data structure.
1984  * @rspiocb: pointer to lpfc response iocb data structure.
1985  *
1986  * This routine is the completion callback function for issuing the Port
1987  * Login (PLOGI) command. For PLOGI completion, there must be an active
1988  * ndlp on the vport node list that matches the remote node ID from the
1989  * PLOGI response IOCB. If such ndlp does not exist, the PLOGI is simply
1990  * ignored and command IOCB released. The PLOGI response IOCB status is
1991  * checked for error conditions. If there is error status reported, PLOGI
1992  * retry shall be attempted by invoking the lpfc_els_retry() routine.
1993  * Otherwise, the lpfc_plogi_confirm_nport() routine shall be invoked on
1994  * the ndlp and the NLP_EVT_CMPL_PLOGI state to the Discover State Machine
1995  * (DSM) is set for this PLOGI completion. Finally, it checks whether
1996  * there are additional N_Port nodes with the vport that need to perform
1997  * PLOGI. If so, the lpfc_more_plogi() routine is invoked to issue addition
1998  * PLOGIs.
1999  **/
2000 static void
lpfc_cmpl_els_plogi(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)2001 lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2002 		    struct lpfc_iocbq *rspiocb)
2003 {
2004 	struct lpfc_vport *vport = cmdiocb->vport;
2005 	IOCB_t *irsp;
2006 	struct lpfc_nodelist *ndlp, *free_ndlp;
2007 	struct lpfc_dmabuf *prsp;
2008 	bool disc;
2009 	struct serv_parm *sp = NULL;
2010 	u32 ulp_status, ulp_word4, did, iotag;
2011 	bool release_node = false;
2012 
2013 	/* we pass cmdiocb to state machine which needs rspiocb as well */
2014 	cmdiocb->rsp_iocb = rspiocb;
2015 
2016 	ulp_status = get_job_ulpstatus(phba, rspiocb);
2017 	ulp_word4 = get_job_word4(phba, rspiocb);
2018 	did = get_job_els_rsp64_did(phba, cmdiocb);
2019 
2020 	if (phba->sli_rev == LPFC_SLI_REV4) {
2021 		iotag = get_wqe_reqtag(cmdiocb);
2022 	} else {
2023 		irsp = &rspiocb->iocb;
2024 		iotag = irsp->ulpIoTag;
2025 	}
2026 
2027 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2028 		"PLOGI cmpl:      status:x%x/x%x did:x%x",
2029 		ulp_status, ulp_word4, did);
2030 
2031 	ndlp = lpfc_findnode_did(vport, did);
2032 	if (!ndlp) {
2033 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2034 				 "0136 PLOGI completes to NPort x%x "
2035 				 "with no ndlp. Data: x%x x%x x%x\n",
2036 				 did, ulp_status, ulp_word4, iotag);
2037 		goto out_freeiocb;
2038 	}
2039 
2040 	/* Since ndlp can be freed in the disc state machine, note if this node
2041 	 * is being used during discovery.
2042 	 */
2043 	disc = test_and_clear_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2044 
2045 	/* PLOGI completes to NPort <nlp_DID> */
2046 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2047 			 "0102 PLOGI completes to NPort x%06x "
2048 			 "IoTag x%x Data: x%x x%x x%x x%x x%x\n",
2049 			 ndlp->nlp_DID, iotag,
2050 			 ndlp->nlp_fc4_type,
2051 			 ulp_status, ulp_word4,
2052 			 disc, vport->num_disc_nodes);
2053 
2054 	/* Check to see if link went down during discovery */
2055 	if (lpfc_els_chk_latt(vport)) {
2056 		set_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2057 		goto out;
2058 	}
2059 
2060 	if (ulp_status) {
2061 		/* Check for retry */
2062 		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2063 			/* ELS command is being retried */
2064 			if (disc)
2065 				set_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2066 			goto out;
2067 		}
2068 		/* Warn PLOGI status Don't print the vport to vport rjts */
2069 		if (ulp_status != IOSTAT_LS_RJT ||
2070 		    (((ulp_word4) >> 16 != LSRJT_INVALID_CMD) &&
2071 		     ((ulp_word4) >> 16 != LSRJT_UNABLE_TPC)) ||
2072 		    (phba)->pport->cfg_log_verbose & LOG_ELS)
2073 			lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
2074 				      "2753 PLOGI DID:%06X "
2075 				      "Status:x%x/x%x\n",
2076 				      ndlp->nlp_DID, ulp_status,
2077 				      ulp_word4);
2078 
2079 		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2080 		if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
2081 			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2082 						NLP_EVT_CMPL_PLOGI);
2083 
2084 		/* If a PLOGI collision occurred, the node needs to continue
2085 		 * with the reglogin process.
2086 		 */
2087 		spin_lock_irq(&ndlp->lock);
2088 		if ((test_bit(NLP_ACC_REGLOGIN, &ndlp->nlp_flag) ||
2089 		     test_bit(NLP_RCV_PLOGI, &ndlp->nlp_flag)) &&
2090 		    ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE) {
2091 			spin_unlock_irq(&ndlp->lock);
2092 			goto out;
2093 		}
2094 
2095 		/* No PLOGI collision and the node is not registered with the
2096 		 * scsi or nvme transport. It is no longer an active node. Just
2097 		 * start the device remove process.
2098 		 */
2099 		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2100 			clear_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2101 			if (!test_bit(NLP_IN_DEV_LOSS, &ndlp->nlp_flag))
2102 				release_node = true;
2103 		}
2104 		spin_unlock_irq(&ndlp->lock);
2105 
2106 		if (release_node)
2107 			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2108 						NLP_EVT_DEVICE_RM);
2109 	} else {
2110 		/* Good status, call state machine */
2111 		prsp = list_get_first(&cmdiocb->cmd_dmabuf->list,
2112 				      struct lpfc_dmabuf, list);
2113 		if (!prsp)
2114 			goto out;
2115 		if (!lpfc_is_els_acc_rsp(prsp))
2116 			goto out;
2117 		ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
2118 
2119 		sp = (struct serv_parm *)((u8 *)prsp->virt +
2120 					  sizeof(u32));
2121 
2122 		ndlp->vmid_support = 0;
2123 		if ((phba->cfg_vmid_app_header && sp->cmn.app_hdr_support) ||
2124 		    (phba->cfg_vmid_priority_tagging &&
2125 		     sp->cmn.priority_tagging)) {
2126 			lpfc_printf_log(phba, KERN_DEBUG, LOG_ELS,
2127 					"4018 app_hdr_support %d tagging %d DID x%x\n",
2128 					sp->cmn.app_hdr_support,
2129 					sp->cmn.priority_tagging,
2130 					ndlp->nlp_DID);
2131 			/* if the dest port supports VMID, mark it in ndlp */
2132 			ndlp->vmid_support = 1;
2133 		}
2134 
2135 		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2136 					NLP_EVT_CMPL_PLOGI);
2137 	}
2138 
2139 	if (disc && vport->num_disc_nodes) {
2140 		/* Check to see if there are more PLOGIs to be sent */
2141 		lpfc_more_plogi(vport);
2142 
2143 		if (vport->num_disc_nodes == 0) {
2144 			clear_bit(FC_NDISC_ACTIVE, &vport->fc_flag);
2145 
2146 			lpfc_can_disctmo(vport);
2147 			lpfc_end_rscn(vport);
2148 		}
2149 	}
2150 
2151 out:
2152 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
2153 			      "PLOGI Cmpl PUT:     did:x%x refcnt %d",
2154 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2155 
2156 out_freeiocb:
2157 	/* Release the reference on the original I/O request. */
2158 	free_ndlp = cmdiocb->ndlp;
2159 
2160 	lpfc_els_free_iocb(phba, cmdiocb);
2161 	lpfc_nlp_put(free_ndlp);
2162 	return;
2163 }
2164 
2165 /**
2166  * lpfc_issue_els_plogi - Issue an plogi iocb command for a vport
2167  * @vport: pointer to a host virtual N_Port data structure.
2168  * @did: destination port identifier.
2169  * @retry: number of retries to the command IOCB.
2170  *
2171  * This routine issues a Port Login (PLOGI) command to a remote N_Port
2172  * (with the @did) for a @vport. Before issuing a PLOGI to a remote N_Port,
2173  * the ndlp with the remote N_Port DID must exist on the @vport's ndlp list.
2174  * This routine constructs the proper fields of the PLOGI IOCB and invokes
2175  * the lpfc_sli_issue_iocb() routine to send out PLOGI ELS command.
2176  *
2177  * Note that the ndlp reference count will be incremented by 1 for holding
2178  * the ndlp and the reference to ndlp will be stored into the ndlp field
2179  * of the IOCB for the completion callback function to the PLOGI ELS command.
2180  *
2181  * Return code
2182  *   0 - Successfully issued a plogi for @vport
2183  *   1 - failed to issue a plogi for @vport
2184  **/
2185 int
lpfc_issue_els_plogi(struct lpfc_vport * vport,uint32_t did,uint8_t retry)2186 lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
2187 {
2188 	struct lpfc_hba  *phba = vport->phba;
2189 	struct serv_parm *sp;
2190 	struct lpfc_nodelist *ndlp;
2191 	struct lpfc_iocbq *elsiocb;
2192 	uint8_t *pcmd;
2193 	uint16_t cmdsize;
2194 	int ret;
2195 
2196 	ndlp = lpfc_findnode_did(vport, did);
2197 	if (!ndlp)
2198 		return 1;
2199 
2200 	/* Defer the processing of the issue PLOGI until after the
2201 	 * outstanding UNREG_RPI mbox command completes, unless we
2202 	 * are going offline. This logic does not apply for Fabric DIDs
2203 	 */
2204 	if ((test_bit(NLP_IGNR_REG_CMPL, &ndlp->nlp_flag) ||
2205 	     test_bit(NLP_UNREG_INP, &ndlp->nlp_flag)) &&
2206 	    ((ndlp->nlp_DID & Fabric_DID_MASK) != Fabric_DID_MASK) &&
2207 	    !test_bit(FC_OFFLINE_MODE, &vport->fc_flag)) {
2208 		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2209 				 "4110 Issue PLOGI x%x deferred "
2210 				 "on NPort x%x rpi x%x flg x%lx Data:"
2211 				 " x%px\n",
2212 				 ndlp->nlp_defer_did, ndlp->nlp_DID,
2213 				 ndlp->nlp_rpi, ndlp->nlp_flag, ndlp);
2214 
2215 		/* We can only defer 1st PLOGI */
2216 		if (ndlp->nlp_defer_did == NLP_EVT_NOTHING_PENDING)
2217 			ndlp->nlp_defer_did = did;
2218 		return 0;
2219 	}
2220 
2221 	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
2222 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
2223 				     ELS_CMD_PLOGI);
2224 	if (!elsiocb)
2225 		return 1;
2226 
2227 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
2228 
2229 	/* For PLOGI request, remainder of payload is service parameters */
2230 	*((uint32_t *) (pcmd)) = ELS_CMD_PLOGI;
2231 	pcmd += sizeof(uint32_t);
2232 	memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
2233 	sp = (struct serv_parm *) pcmd;
2234 
2235 	/*
2236 	 * If we are a N-port connected to a Fabric, fix-up paramm's so logins
2237 	 * to device on remote loops work.
2238 	 */
2239 	if (test_bit(FC_FABRIC, &vport->fc_flag) &&
2240 	    !test_bit(FC_PUBLIC_LOOP, &vport->fc_flag))
2241 		sp->cmn.altBbCredit = 1;
2242 
2243 	if (sp->cmn.fcphLow < FC_PH_4_3)
2244 		sp->cmn.fcphLow = FC_PH_4_3;
2245 
2246 	if (sp->cmn.fcphHigh < FC_PH3)
2247 		sp->cmn.fcphHigh = FC_PH3;
2248 
2249 	sp->cmn.valid_vendor_ver_level = 0;
2250 	memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
2251 	sp->cmn.bbRcvSizeMsb &= 0xF;
2252 
2253 	/* Check if the destination port supports VMID */
2254 	ndlp->vmid_support = 0;
2255 	if (vport->vmid_priority_tagging)
2256 		sp->cmn.priority_tagging = 1;
2257 	else if (phba->cfg_vmid_app_header &&
2258 		 bf_get(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags))
2259 		sp->cmn.app_hdr_support = 1;
2260 
2261 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2262 		"Issue PLOGI:     did:x%x",
2263 		did, 0, 0);
2264 
2265 	/* If our firmware supports this feature, convey that
2266 	 * information to the target using the vendor specific field.
2267 	 */
2268 	if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
2269 		sp->cmn.valid_vendor_ver_level = 1;
2270 		sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
2271 		sp->un.vv.flags = cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
2272 	}
2273 
2274 	phba->fc_stat.elsXmitPLOGI++;
2275 	elsiocb->cmd_cmpl = lpfc_cmpl_els_plogi;
2276 
2277 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2278 			      "Issue PLOGI:     did:x%x refcnt %d",
2279 			      did, kref_read(&ndlp->kref), 0);
2280 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
2281 	if (!elsiocb->ndlp) {
2282 		lpfc_els_free_iocb(phba, elsiocb);
2283 		return 1;
2284 	}
2285 
2286 	ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2287 	if (ret) {
2288 		lpfc_els_free_iocb(phba, elsiocb);
2289 		lpfc_nlp_put(ndlp);
2290 		return 1;
2291 	}
2292 
2293 	return 0;
2294 }
2295 
2296 /**
2297  * lpfc_cmpl_els_prli - Completion callback function for prli
2298  * @phba: pointer to lpfc hba data structure.
2299  * @cmdiocb: pointer to lpfc command iocb data structure.
2300  * @rspiocb: pointer to lpfc response iocb data structure.
2301  *
2302  * This routine is the completion callback function for a Process Login
2303  * (PRLI) ELS command. The PRLI response IOCB status is checked for error
2304  * status. If there is error status reported, PRLI retry shall be attempted
2305  * by invoking the lpfc_els_retry() routine. Otherwise, the state
2306  * NLP_EVT_CMPL_PRLI is sent to the Discover State Machine (DSM) for this
2307  * ndlp to mark the PRLI completion.
2308  **/
2309 static void
lpfc_cmpl_els_prli(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)2310 lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2311 		   struct lpfc_iocbq *rspiocb)
2312 {
2313 	struct lpfc_vport *vport = cmdiocb->vport;
2314 	struct lpfc_nodelist *ndlp;
2315 	char *mode;
2316 	u32 ulp_status;
2317 	u32 ulp_word4;
2318 	bool release_node = false;
2319 
2320 	/* we pass cmdiocb to state machine which needs rspiocb as well */
2321 	cmdiocb->rsp_iocb = rspiocb;
2322 
2323 	ndlp = cmdiocb->ndlp;
2324 
2325 	ulp_status = get_job_ulpstatus(phba, rspiocb);
2326 	ulp_word4 = get_job_word4(phba, rspiocb);
2327 
2328 	clear_bit(NLP_PRLI_SND, &ndlp->nlp_flag);
2329 
2330 	/* Driver supports multiple FC4 types.  Counters matter. */
2331 	spin_lock_irq(&ndlp->lock);
2332 	vport->fc_prli_sent--;
2333 	ndlp->fc4_prli_sent--;
2334 	spin_unlock_irq(&ndlp->lock);
2335 
2336 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2337 		"PRLI cmpl:       status:x%x/x%x did:x%x",
2338 		ulp_status, ulp_word4,
2339 		ndlp->nlp_DID);
2340 
2341 	/* PRLI completes to NPort <nlp_DID> */
2342 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2343 			 "0103 PRLI completes to NPort x%06x "
2344 			 "Data: x%x x%x x%x x%x x%x\n",
2345 			 ndlp->nlp_DID, ulp_status, ulp_word4,
2346 			 vport->num_disc_nodes, ndlp->fc4_prli_sent,
2347 			 ndlp->fc4_xpt_flags);
2348 
2349 	/* Check to see if link went down during discovery */
2350 	if (lpfc_els_chk_latt(vport))
2351 		goto out;
2352 
2353 	if (ulp_status) {
2354 		/* Check for retry */
2355 		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2356 			/* ELS command is being retried */
2357 			goto out;
2358 		}
2359 
2360 		/* If we don't send GFT_ID to Fabric, a PRLI error
2361 		 * could be expected.
2362 		 */
2363 		if (test_bit(FC_FABRIC, &vport->fc_flag) ||
2364 		    vport->cfg_enable_fc4_type != LPFC_ENABLE_BOTH)
2365 			mode = KERN_WARNING;
2366 		else
2367 			mode = KERN_INFO;
2368 
2369 		/* Warn PRLI status */
2370 		lpfc_printf_vlog(vport, mode, LOG_ELS,
2371 				 "2754 PRLI DID:%06X Status:x%x/x%x, "
2372 				 "data: x%x x%x x%lx\n",
2373 				 ndlp->nlp_DID, ulp_status,
2374 				 ulp_word4, ndlp->nlp_state,
2375 				 ndlp->fc4_prli_sent, ndlp->nlp_flag);
2376 
2377 		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2378 		if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
2379 			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2380 						NLP_EVT_CMPL_PRLI);
2381 
2382 		/* The following condition catches an inflight transition
2383 		 * mismatch typically caused by an RSCN. Skip any
2384 		 * processing to allow recovery.
2385 		 */
2386 		if ((ndlp->nlp_state >= NLP_STE_PLOGI_ISSUE &&
2387 		     ndlp->nlp_state <= NLP_STE_REG_LOGIN_ISSUE) ||
2388 		    (ndlp->nlp_state == NLP_STE_NPR_NODE &&
2389 		     test_bit(NLP_DELAY_TMO, &ndlp->nlp_flag))) {
2390 			lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
2391 					 "2784 PRLI cmpl: Allow Node recovery "
2392 					 "DID x%06x nstate x%x nflag x%lx\n",
2393 					 ndlp->nlp_DID, ndlp->nlp_state,
2394 					 ndlp->nlp_flag);
2395 			goto out;
2396 		}
2397 
2398 		/*
2399 		 * For P2P topology, retain the node so that PLOGI can be
2400 		 * attempted on it again.
2401 		 */
2402 		if (test_bit(FC_PT2PT, &vport->fc_flag))
2403 			goto out;
2404 
2405 		/* As long as this node is not registered with the SCSI
2406 		 * or NVMe transport and no other PRLIs are outstanding,
2407 		 * it is no longer an active node.  Otherwise devloss
2408 		 * handles the final cleanup.
2409 		 */
2410 		spin_lock_irq(&ndlp->lock);
2411 		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
2412 		    !ndlp->fc4_prli_sent) {
2413 			clear_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2414 			if (!test_bit(NLP_IN_DEV_LOSS, &ndlp->nlp_flag))
2415 				release_node = true;
2416 		}
2417 		spin_unlock_irq(&ndlp->lock);
2418 
2419 		if (release_node)
2420 			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2421 						NLP_EVT_DEVICE_RM);
2422 	} else {
2423 		/* Good status, call state machine.  However, if another
2424 		 * PRLI is outstanding, don't call the state machine
2425 		 * because final disposition to Mapped or Unmapped is
2426 		 * completed there.
2427 		 */
2428 		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2429 					NLP_EVT_CMPL_PRLI);
2430 	}
2431 
2432 out:
2433 	lpfc_els_free_iocb(phba, cmdiocb);
2434 	lpfc_nlp_put(ndlp);
2435 	return;
2436 }
2437 
2438 /**
2439  * lpfc_issue_els_prli - Issue a prli iocb command for a vport
2440  * @vport: pointer to a host virtual N_Port data structure.
2441  * @ndlp: pointer to a node-list data structure.
2442  * @retry: number of retries to the command IOCB.
2443  *
2444  * This routine issues a Process Login (PRLI) ELS command for the
2445  * @vport. The PRLI service parameters are set up in the payload of the
2446  * PRLI Request command and the pointer to lpfc_cmpl_els_prli() routine
2447  * is put to the IOCB completion callback func field before invoking the
2448  * routine lpfc_sli_issue_iocb() to send out PRLI command.
2449  *
2450  * Note that the ndlp reference count will be incremented by 1 for holding the
2451  * ndlp and the reference to ndlp will be stored into the ndlp field of
2452  * the IOCB for the completion callback function to the PRLI ELS command.
2453  *
2454  * Return code
2455  *   0 - successfully issued prli iocb command for @vport
2456  *   1 - failed to issue prli iocb command for @vport
2457  **/
2458 int
lpfc_issue_els_prli(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,uint8_t retry)2459 lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2460 		    uint8_t retry)
2461 {
2462 	int rc = 0;
2463 	struct lpfc_hba *phba = vport->phba;
2464 	PRLI *npr;
2465 	struct lpfc_nvme_prli *npr_nvme;
2466 	struct lpfc_iocbq *elsiocb;
2467 	uint8_t *pcmd;
2468 	uint16_t cmdsize;
2469 	u32 local_nlp_type, elscmd;
2470 
2471 	/*
2472 	 * If we are in RSCN mode, the FC4 types supported from a
2473 	 * previous GFT_ID command may not be accurate. So, if we
2474 	 * are a NVME Initiator, always look for the possibility of
2475 	 * the remote NPort beng a NVME Target.
2476 	 */
2477 	if (phba->sli_rev == LPFC_SLI_REV4 &&
2478 	    test_bit(FC_RSCN_MODE, &vport->fc_flag) &&
2479 	    vport->nvmei_support)
2480 		ndlp->nlp_fc4_type |= NLP_FC4_NVME;
2481 	local_nlp_type = ndlp->nlp_fc4_type;
2482 
2483 	/* This routine will issue 1 or 2 PRLIs, so zero all the ndlp
2484 	 * fields here before any of them can complete.
2485 	 */
2486 	ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
2487 	ndlp->nlp_type &= ~(NLP_NVME_TARGET | NLP_NVME_INITIATOR);
2488 	ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
2489 	clear_bit(NLP_FIRSTBURST, &ndlp->nlp_flag);
2490 	clear_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2491 	ndlp->nvme_fb_size = 0;
2492 
2493  send_next_prli:
2494 	if (local_nlp_type & NLP_FC4_FCP) {
2495 		/* Payload is 4 + 16 = 20 x14 bytes. */
2496 		cmdsize = (sizeof(uint32_t) + sizeof(PRLI));
2497 		elscmd = ELS_CMD_PRLI;
2498 	} else if (local_nlp_type & NLP_FC4_NVME) {
2499 		/* Payload is 4 + 20 = 24 x18 bytes. */
2500 		cmdsize = (sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli));
2501 		elscmd = ELS_CMD_NVMEPRLI;
2502 	} else {
2503 		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2504 				 "3083 Unknown FC_TYPE x%x ndlp x%06x\n",
2505 				 ndlp->nlp_fc4_type, ndlp->nlp_DID);
2506 		return 1;
2507 	}
2508 
2509 	/* SLI3 ports don't support NVME.  If this rport is a strict NVME
2510 	 * FC4 type, implicitly LOGO.
2511 	 */
2512 	if (phba->sli_rev == LPFC_SLI_REV3 &&
2513 	    ndlp->nlp_fc4_type == NLP_FC4_NVME) {
2514 		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2515 				 "3088 Rport fc4 type 0x%x not supported by SLI3 adapter\n",
2516 				 ndlp->nlp_type);
2517 		lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
2518 		return 1;
2519 	}
2520 
2521 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2522 				     ndlp->nlp_DID, elscmd);
2523 	if (!elsiocb)
2524 		return 1;
2525 
2526 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
2527 
2528 	/* For PRLI request, remainder of payload is service parameters */
2529 	memset(pcmd, 0, cmdsize);
2530 
2531 	if (local_nlp_type & NLP_FC4_FCP) {
2532 		/* Remainder of payload is FCP PRLI parameter page.
2533 		 * Note: this data structure is defined as
2534 		 * BE/LE in the structure definition so no
2535 		 * byte swap call is made.
2536 		 */
2537 		*((uint32_t *)(pcmd)) = ELS_CMD_PRLI;
2538 		pcmd += sizeof(uint32_t);
2539 		npr = (PRLI *)pcmd;
2540 
2541 		/*
2542 		 * If our firmware version is 3.20 or later,
2543 		 * set the following bits for FC-TAPE support.
2544 		 */
2545 		if (phba->vpd.rev.feaLevelHigh >= 0x02) {
2546 			npr->ConfmComplAllowed = 1;
2547 			npr->Retry = 1;
2548 			npr->TaskRetryIdReq = 1;
2549 		}
2550 		npr->estabImagePair = 1;
2551 		npr->readXferRdyDis = 1;
2552 		if (vport->cfg_first_burst_size)
2553 			npr->writeXferRdyDis = 1;
2554 
2555 		/* For FCP support */
2556 		npr->prliType = PRLI_FCP_TYPE;
2557 		npr->initiatorFunc = 1;
2558 		elsiocb->cmd_flag |= LPFC_PRLI_FCP_REQ;
2559 
2560 		/* Remove FCP type - processed. */
2561 		local_nlp_type &= ~NLP_FC4_FCP;
2562 	} else if (local_nlp_type & NLP_FC4_NVME) {
2563 		/* Remainder of payload is NVME PRLI parameter page.
2564 		 * This data structure is the newer definition that
2565 		 * uses bf macros so a byte swap is required.
2566 		 */
2567 		*((uint32_t *)(pcmd)) = ELS_CMD_NVMEPRLI;
2568 		pcmd += sizeof(uint32_t);
2569 		npr_nvme = (struct lpfc_nvme_prli *)pcmd;
2570 		bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
2571 		bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
2572 		if (phba->nsler) {
2573 			bf_set(prli_nsler, npr_nvme, 1);
2574 			bf_set(prli_conf, npr_nvme, 1);
2575 		}
2576 
2577 		/* Only initiators request first burst. */
2578 		if ((phba->cfg_nvme_enable_fb) &&
2579 		    !phba->nvmet_support)
2580 			bf_set(prli_fba, npr_nvme, 1);
2581 
2582 		if (phba->nvmet_support) {
2583 			bf_set(prli_tgt, npr_nvme, 1);
2584 			bf_set(prli_disc, npr_nvme, 1);
2585 		} else {
2586 			bf_set(prli_init, npr_nvme, 1);
2587 			bf_set(prli_conf, npr_nvme, 1);
2588 		}
2589 
2590 		npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
2591 		npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
2592 		elsiocb->cmd_flag |= LPFC_PRLI_NVME_REQ;
2593 
2594 		/* Remove NVME type - processed. */
2595 		local_nlp_type &= ~NLP_FC4_NVME;
2596 	}
2597 
2598 	phba->fc_stat.elsXmitPRLI++;
2599 	elsiocb->cmd_cmpl = lpfc_cmpl_els_prli;
2600 
2601 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2602 			      "Issue PRLI:  did:x%x refcnt %d",
2603 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2604 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
2605 	if (!elsiocb->ndlp) {
2606 		lpfc_els_free_iocb(phba, elsiocb);
2607 		return 1;
2608 	}
2609 
2610 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2611 	if (rc == IOCB_ERROR) {
2612 		lpfc_els_free_iocb(phba, elsiocb);
2613 		lpfc_nlp_put(ndlp);
2614 		return 1;
2615 	}
2616 
2617 	/* The vport counters are used for lpfc_scan_finished, but
2618 	 * the ndlp is used to track outstanding PRLIs for different
2619 	 * FC4 types.
2620 	 */
2621 	set_bit(NLP_PRLI_SND, &ndlp->nlp_flag);
2622 	spin_lock_irq(&ndlp->lock);
2623 	vport->fc_prli_sent++;
2624 	ndlp->fc4_prli_sent++;
2625 	spin_unlock_irq(&ndlp->lock);
2626 
2627 	/* The driver supports 2 FC4 types.  Make sure
2628 	 * a PRLI is issued for all types before exiting.
2629 	 */
2630 	if (phba->sli_rev == LPFC_SLI_REV4 &&
2631 	    local_nlp_type & (NLP_FC4_FCP | NLP_FC4_NVME))
2632 		goto send_next_prli;
2633 	else
2634 		return 0;
2635 }
2636 
2637 /**
2638  * lpfc_rscn_disc - Perform rscn discovery for a vport
2639  * @vport: pointer to a host virtual N_Port data structure.
2640  *
2641  * This routine performs Registration State Change Notification (RSCN)
2642  * discovery for a @vport. If the @vport's node port recovery count is not
2643  * zero, it will invoke the lpfc_els_disc_plogi() to perform PLOGI for all
2644  * the nodes that need recovery. If none of the PLOGI were needed through
2645  * the lpfc_els_disc_plogi() routine, the lpfc_end_rscn() routine shall be
2646  * invoked to check and handle possible more RSCN came in during the period
2647  * of processing the current ones.
2648  **/
2649 static void
lpfc_rscn_disc(struct lpfc_vport * vport)2650 lpfc_rscn_disc(struct lpfc_vport *vport)
2651 {
2652 	lpfc_can_disctmo(vport);
2653 
2654 	/* RSCN discovery */
2655 	/* go thru NPR nodes and issue ELS PLOGIs */
2656 	if (atomic_read(&vport->fc_npr_cnt))
2657 		if (lpfc_els_disc_plogi(vport))
2658 			return;
2659 
2660 	lpfc_end_rscn(vport);
2661 }
2662 
2663 /**
2664  * lpfc_adisc_done - Complete the adisc phase of discovery
2665  * @vport: pointer to lpfc_vport hba data structure that finished all ADISCs.
2666  *
2667  * This function is called when the final ADISC is completed during discovery.
2668  * This function handles clearing link attention or issuing reg_vpi depending
2669  * on whether npiv is enabled. This function also kicks off the PLOGI phase of
2670  * discovery.
2671  * This function is called with no locks held.
2672  **/
2673 static void
lpfc_adisc_done(struct lpfc_vport * vport)2674 lpfc_adisc_done(struct lpfc_vport *vport)
2675 {
2676 	struct lpfc_hba   *phba = vport->phba;
2677 
2678 	/*
2679 	 * For NPIV, cmpl_reg_vpi will set port_state to READY,
2680 	 * and continue discovery.
2681 	 */
2682 	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2683 	    !test_bit(FC_RSCN_MODE, &vport->fc_flag) &&
2684 	    (phba->sli_rev < LPFC_SLI_REV4)) {
2685 
2686 		/*
2687 		 * If link is down, clear_la and reg_vpi will be done after
2688 		 * flogi following a link up event
2689 		 */
2690 		if (!lpfc_is_link_up(phba))
2691 			return;
2692 
2693 		/* The ADISCs are complete.  Doesn't matter if they
2694 		 * succeeded or failed because the ADISC completion
2695 		 * routine guarantees to call the state machine and
2696 		 * the RPI is either unregistered (failed ADISC response)
2697 		 * or the RPI is still valid and the node is marked
2698 		 * mapped for a target.  The exchanges should be in the
2699 		 * correct state. This code is specific to SLI3.
2700 		 */
2701 		lpfc_issue_clear_la(phba, vport);
2702 		lpfc_issue_reg_vpi(phba, vport);
2703 		return;
2704 	}
2705 	/*
2706 	* For SLI2, we need to set port_state to READY
2707 	* and continue discovery.
2708 	*/
2709 	if (vport->port_state < LPFC_VPORT_READY) {
2710 		/* If we get here, there is nothing to ADISC */
2711 		lpfc_issue_clear_la(phba, vport);
2712 		if (!test_bit(FC_ABORT_DISCOVERY, &vport->fc_flag)) {
2713 			vport->num_disc_nodes = 0;
2714 			/* go thru NPR list, issue ELS PLOGIs */
2715 			if (atomic_read(&vport->fc_npr_cnt))
2716 				lpfc_els_disc_plogi(vport);
2717 			if (!vport->num_disc_nodes) {
2718 				clear_bit(FC_NDISC_ACTIVE, &vport->fc_flag);
2719 				lpfc_can_disctmo(vport);
2720 				lpfc_end_rscn(vport);
2721 			}
2722 		}
2723 		vport->port_state = LPFC_VPORT_READY;
2724 	} else
2725 		lpfc_rscn_disc(vport);
2726 }
2727 
2728 /**
2729  * lpfc_more_adisc - Issue more adisc as needed
2730  * @vport: pointer to a host virtual N_Port data structure.
2731  *
2732  * This routine determines whether there are more ndlps on a @vport
2733  * node list need to have Address Discover (ADISC) issued. If so, it will
2734  * invoke the lpfc_els_disc_adisc() routine to issue ADISC on the @vport's
2735  * remaining nodes which need to have ADISC sent.
2736  **/
2737 void
lpfc_more_adisc(struct lpfc_vport * vport)2738 lpfc_more_adisc(struct lpfc_vport *vport)
2739 {
2740 	if (vport->num_disc_nodes)
2741 		vport->num_disc_nodes--;
2742 	/* Continue discovery with <num_disc_nodes> ADISCs to go */
2743 	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2744 			 "0210 Continue discovery with %d ADISCs to go "
2745 			 "Data: x%x x%lx x%x\n",
2746 			 vport->num_disc_nodes,
2747 			 atomic_read(&vport->fc_adisc_cnt),
2748 			 vport->fc_flag, vport->port_state);
2749 	/* Check to see if there are more ADISCs to be sent */
2750 	if (test_bit(FC_NLP_MORE, &vport->fc_flag)) {
2751 		lpfc_set_disctmo(vport);
2752 		/* go thru NPR nodes and issue any remaining ELS ADISCs */
2753 		lpfc_els_disc_adisc(vport);
2754 	}
2755 	if (!vport->num_disc_nodes)
2756 		lpfc_adisc_done(vport);
2757 	return;
2758 }
2759 
2760 /**
2761  * lpfc_cmpl_els_adisc - Completion callback function for adisc
2762  * @phba: pointer to lpfc hba data structure.
2763  * @cmdiocb: pointer to lpfc command iocb data structure.
2764  * @rspiocb: pointer to lpfc response iocb data structure.
2765  *
2766  * This routine is the completion function for issuing the Address Discover
2767  * (ADISC) command. It first checks to see whether link went down during
2768  * the discovery process. If so, the node will be marked as node port
2769  * recovery for issuing discover IOCB by the link attention handler and
2770  * exit. Otherwise, the response status is checked. If error was reported
2771  * in the response status, the ADISC command shall be retried by invoking
2772  * the lpfc_els_retry() routine. Otherwise, if no error was reported in
2773  * the response status, the state machine is invoked to set transition
2774  * with respect to NLP_EVT_CMPL_ADISC event.
2775  **/
2776 static void
lpfc_cmpl_els_adisc(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)2777 lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2778 		    struct lpfc_iocbq *rspiocb)
2779 {
2780 	struct lpfc_vport *vport = cmdiocb->vport;
2781 	IOCB_t *irsp;
2782 	struct lpfc_nodelist *ndlp;
2783 	bool  disc;
2784 	u32 ulp_status, ulp_word4, tmo, iotag;
2785 	bool release_node = false;
2786 
2787 	/* we pass cmdiocb to state machine which needs rspiocb as well */
2788 	cmdiocb->rsp_iocb = rspiocb;
2789 
2790 	ndlp = cmdiocb->ndlp;
2791 
2792 	ulp_status = get_job_ulpstatus(phba, rspiocb);
2793 	ulp_word4 = get_job_word4(phba, rspiocb);
2794 
2795 	if (phba->sli_rev == LPFC_SLI_REV4) {
2796 		tmo = get_wqe_tmo(cmdiocb);
2797 		iotag = get_wqe_reqtag(cmdiocb);
2798 	} else {
2799 		irsp = &rspiocb->iocb;
2800 		tmo = irsp->ulpTimeout;
2801 		iotag = irsp->ulpIoTag;
2802 	}
2803 
2804 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2805 		"ADISC cmpl:      status:x%x/x%x did:x%x",
2806 		ulp_status, ulp_word4,
2807 		ndlp->nlp_DID);
2808 
2809 	/* Since ndlp can be freed in the disc state machine, note if this node
2810 	 * is being used during discovery.
2811 	 */
2812 	disc = test_and_clear_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2813 	clear_bit(NLP_ADISC_SND, &ndlp->nlp_flag);
2814 	/* ADISC completes to NPort <nlp_DID> */
2815 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2816 			 "0104 ADISC completes to NPort x%x "
2817 			 "IoTag x%x Data: x%x x%x x%x x%x x%x\n",
2818 			 ndlp->nlp_DID, iotag,
2819 			 ulp_status, ulp_word4,
2820 			 tmo, disc, vport->num_disc_nodes);
2821 
2822 	/* Check to see if link went down during discovery */
2823 	if (lpfc_els_chk_latt(vport)) {
2824 		set_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2825 		goto out;
2826 	}
2827 
2828 	if (ulp_status) {
2829 		/* Check for retry */
2830 		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2831 			/* ELS command is being retried */
2832 			if (disc) {
2833 				set_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2834 				lpfc_set_disctmo(vport);
2835 			}
2836 			goto out;
2837 		}
2838 		/* Warn ADISC status */
2839 		lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
2840 			      "2755 ADISC DID:%06X Status:x%x/x%x\n",
2841 			      ndlp->nlp_DID, ulp_status,
2842 			      ulp_word4);
2843 		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2844 					NLP_EVT_CMPL_ADISC);
2845 
2846 		/* As long as this node is not registered with the SCSI or NVMe
2847 		 * transport, it is no longer an active node. Otherwise
2848 		 * devloss handles the final cleanup.
2849 		 */
2850 		spin_lock_irq(&ndlp->lock);
2851 		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2852 			clear_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
2853 			if (!test_bit(NLP_IN_DEV_LOSS, &ndlp->nlp_flag))
2854 				release_node = true;
2855 		}
2856 		spin_unlock_irq(&ndlp->lock);
2857 
2858 		if (release_node)
2859 			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2860 						NLP_EVT_DEVICE_RM);
2861 	} else
2862 		/* Good status, call state machine */
2863 		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2864 					NLP_EVT_CMPL_ADISC);
2865 
2866 	/* Check to see if there are more ADISCs to be sent */
2867 	if (disc && vport->num_disc_nodes)
2868 		lpfc_more_adisc(vport);
2869 out:
2870 	lpfc_els_free_iocb(phba, cmdiocb);
2871 	lpfc_nlp_put(ndlp);
2872 	return;
2873 }
2874 
2875 /**
2876  * lpfc_issue_els_adisc - Issue an address discover iocb to an node on a vport
2877  * @vport: pointer to a virtual N_Port data structure.
2878  * @ndlp: pointer to a node-list data structure.
2879  * @retry: number of retries to the command IOCB.
2880  *
2881  * This routine issues an Address Discover (ADISC) for an @ndlp on a
2882  * @vport. It prepares the payload of the ADISC ELS command, updates the
2883  * and states of the ndlp, and invokes the lpfc_sli_issue_iocb() routine
2884  * to issue the ADISC ELS command.
2885  *
2886  * Note that the ndlp reference count will be incremented by 1 for holding the
2887  * ndlp and the reference to ndlp will be stored into the ndlp field of
2888  * the IOCB for the completion callback function to the ADISC ELS command.
2889  *
2890  * Return code
2891  *   0 - successfully issued adisc
2892  *   1 - failed to issue adisc
2893  **/
2894 int
lpfc_issue_els_adisc(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,uint8_t retry)2895 lpfc_issue_els_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2896 		     uint8_t retry)
2897 {
2898 	int rc = 0;
2899 	struct lpfc_hba  *phba = vport->phba;
2900 	ADISC *ap;
2901 	struct lpfc_iocbq *elsiocb;
2902 	uint8_t *pcmd;
2903 	uint16_t cmdsize;
2904 
2905 	cmdsize = (sizeof(uint32_t) + sizeof(ADISC));
2906 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2907 				     ndlp->nlp_DID, ELS_CMD_ADISC);
2908 	if (!elsiocb)
2909 		return 1;
2910 
2911 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
2912 
2913 	/* For ADISC request, remainder of payload is service parameters */
2914 	*((uint32_t *) (pcmd)) = ELS_CMD_ADISC;
2915 	pcmd += sizeof(uint32_t);
2916 
2917 	/* Fill in ADISC payload */
2918 	ap = (ADISC *) pcmd;
2919 	ap->hardAL_PA = phba->fc_pref_ALPA;
2920 	memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
2921 	memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
2922 	ap->DID = be32_to_cpu(vport->fc_myDID);
2923 
2924 	phba->fc_stat.elsXmitADISC++;
2925 	elsiocb->cmd_cmpl = lpfc_cmpl_els_adisc;
2926 	set_bit(NLP_ADISC_SND, &ndlp->nlp_flag);
2927 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
2928 	if (!elsiocb->ndlp) {
2929 		lpfc_els_free_iocb(phba, elsiocb);
2930 		goto err;
2931 	}
2932 
2933 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2934 			      "Issue ADISC:   did:x%x refcnt %d",
2935 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2936 
2937 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2938 	if (rc == IOCB_ERROR) {
2939 		lpfc_els_free_iocb(phba, elsiocb);
2940 		lpfc_nlp_put(ndlp);
2941 		goto err;
2942 	}
2943 
2944 	return 0;
2945 
2946 err:
2947 	clear_bit(NLP_ADISC_SND, &ndlp->nlp_flag);
2948 	return 1;
2949 }
2950 
2951 /**
2952  * lpfc_cmpl_els_logo - Completion callback function for logo
2953  * @phba: pointer to lpfc hba data structure.
2954  * @cmdiocb: pointer to lpfc command iocb data structure.
2955  * @rspiocb: pointer to lpfc response iocb data structure.
2956  *
2957  * This routine is the completion function for issuing the ELS Logout (LOGO)
2958  * command. If no error status was reported from the LOGO response, the
2959  * state machine of the associated ndlp shall be invoked for transition with
2960  * respect to NLP_EVT_CMPL_LOGO event.
2961  **/
2962 static void
lpfc_cmpl_els_logo(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)2963 lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2964 		   struct lpfc_iocbq *rspiocb)
2965 {
2966 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
2967 	struct lpfc_vport *vport = ndlp->vport;
2968 	IOCB_t *irsp;
2969 	uint32_t skip_recovery = 0;
2970 	int wake_up_waiter = 0;
2971 	u32 ulp_status;
2972 	u32 ulp_word4;
2973 	u32 tmo, iotag;
2974 
2975 	/* we pass cmdiocb to state machine which needs rspiocb as well */
2976 	cmdiocb->rsp_iocb = rspiocb;
2977 
2978 	ulp_status = get_job_ulpstatus(phba, rspiocb);
2979 	ulp_word4 = get_job_word4(phba, rspiocb);
2980 
2981 	if (phba->sli_rev == LPFC_SLI_REV4) {
2982 		tmo = get_wqe_tmo(cmdiocb);
2983 		iotag = get_wqe_reqtag(cmdiocb);
2984 	} else {
2985 		irsp = &rspiocb->iocb;
2986 		tmo = irsp->ulpTimeout;
2987 		iotag = irsp->ulpIoTag;
2988 	}
2989 
2990 	clear_bit(NLP_LOGO_SND, &ndlp->nlp_flag);
2991 	if (test_and_clear_bit(NLP_WAIT_FOR_LOGO, &ndlp->save_flags))
2992 		wake_up_waiter = 1;
2993 
2994 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2995 		"LOGO cmpl:       status:x%x/x%x did:x%x",
2996 		ulp_status, ulp_word4,
2997 		ndlp->nlp_DID);
2998 
2999 	/* LOGO completes to NPort <nlp_DID> */
3000 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3001 			 "0105 LOGO completes to NPort x%x "
3002 			 "IoTag x%x refcnt %d nflags x%lx xflags x%x "
3003 			 "Data: x%x x%x x%x x%x\n",
3004 			 ndlp->nlp_DID, iotag,
3005 			 kref_read(&ndlp->kref), ndlp->nlp_flag,
3006 			 ndlp->fc4_xpt_flags, ulp_status, ulp_word4,
3007 			 tmo, vport->num_disc_nodes);
3008 
3009 	if (lpfc_els_chk_latt(vport)) {
3010 		skip_recovery = 1;
3011 		goto out;
3012 	}
3013 
3014 	/* The LOGO will not be retried on failure.  A LOGO was
3015 	 * issued to the remote rport and a ACC or RJT or no Answer are
3016 	 * all acceptable.  Note the failure and move forward with
3017 	 * discovery.  The PLOGI will retry.
3018 	 */
3019 	if (ulp_status) {
3020 		/* Warn LOGO status */
3021 		lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
3022 			      "2756 LOGO, No Retry DID:%06X "
3023 			      "Status:x%x/x%x\n",
3024 			      ndlp->nlp_DID, ulp_status,
3025 			      ulp_word4);
3026 
3027 		if (lpfc_error_lost_link(vport, ulp_status, ulp_word4))
3028 			skip_recovery = 1;
3029 	}
3030 
3031 	/* Call state machine. This will unregister the rpi if needed. */
3032 	lpfc_disc_state_machine(vport, ndlp, cmdiocb, NLP_EVT_CMPL_LOGO);
3033 
3034 out:
3035 	/* At this point, the LOGO processing is complete. NOTE: For a
3036 	 * pt2pt topology, we are assuming the NPortID will only change
3037 	 * on link up processing. For a LOGO / PLOGI initiated by the
3038 	 * Initiator, we are assuming the NPortID is not going to change.
3039 	 */
3040 
3041 	if (wake_up_waiter && ndlp->logo_waitq)
3042 		wake_up(ndlp->logo_waitq);
3043 	/*
3044 	 * If the node is a target, the handling attempts to recover the port.
3045 	 * For any other port type, the rpi is unregistered as an implicit
3046 	 * LOGO.
3047 	 */
3048 	if (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_NVME_TARGET) &&
3049 	    skip_recovery == 0) {
3050 		lpfc_cancel_retry_delay_tmo(vport, ndlp);
3051 		set_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
3052 
3053 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3054 				 "3187 LOGO completes to NPort x%x: Start "
3055 				 "Recovery Data: x%x x%x x%x x%x\n",
3056 				 ndlp->nlp_DID, ulp_status,
3057 				 ulp_word4, tmo,
3058 				 vport->num_disc_nodes);
3059 
3060 		lpfc_els_free_iocb(phba, cmdiocb);
3061 		lpfc_nlp_put(ndlp);
3062 
3063 		lpfc_disc_start(vport);
3064 		return;
3065 	}
3066 
3067 	/* Cleanup path for failed REG_RPI handling. If REG_RPI fails, the
3068 	 * driver sends a LOGO to the rport to cleanup.  For fabric and
3069 	 * initiator ports cleanup the node as long as it the node is not
3070 	 * register with the transport.
3071 	 */
3072 	if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
3073 		clear_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
3074 		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
3075 					NLP_EVT_DEVICE_RM);
3076 	}
3077 
3078 	/* Driver is done with the I/O. */
3079 	lpfc_els_free_iocb(phba, cmdiocb);
3080 	lpfc_nlp_put(ndlp);
3081 }
3082 
3083 /**
3084  * lpfc_issue_els_logo - Issue a logo to an node on a vport
3085  * @vport: pointer to a virtual N_Port data structure.
3086  * @ndlp: pointer to a node-list data structure.
3087  * @retry: number of retries to the command IOCB.
3088  *
3089  * This routine constructs and issues an ELS Logout (LOGO) iocb command
3090  * to a remote node, referred by an @ndlp on a @vport. It constructs the
3091  * payload of the IOCB, properly sets up the @ndlp state, and invokes the
3092  * lpfc_sli_issue_iocb() routine to send out the LOGO ELS command.
3093  *
3094  * Note that the ndlp reference count will be incremented by 1 for holding the
3095  * ndlp and the reference to ndlp will be stored into the ndlp field of
3096  * the IOCB for the completion callback function to the LOGO ELS command.
3097  *
3098  * Callers of this routine are expected to unregister the RPI first
3099  *
3100  * Return code
3101  *   0 - successfully issued logo
3102  *   1 - failed to issue logo
3103  **/
3104 int
lpfc_issue_els_logo(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,uint8_t retry)3105 lpfc_issue_els_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
3106 		    uint8_t retry)
3107 {
3108 	struct lpfc_hba  *phba = vport->phba;
3109 	struct lpfc_iocbq *elsiocb;
3110 	uint8_t *pcmd;
3111 	uint16_t cmdsize;
3112 	int rc;
3113 
3114 	if (test_bit(NLP_LOGO_SND, &ndlp->nlp_flag))
3115 		return 0;
3116 
3117 	cmdsize = (2 * sizeof(uint32_t)) + sizeof(struct lpfc_name);
3118 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3119 				     ndlp->nlp_DID, ELS_CMD_LOGO);
3120 	if (!elsiocb)
3121 		return 1;
3122 
3123 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
3124 	*((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
3125 	pcmd += sizeof(uint32_t);
3126 
3127 	/* Fill in LOGO payload */
3128 	*((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
3129 	pcmd += sizeof(uint32_t);
3130 	memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
3131 
3132 	phba->fc_stat.elsXmitLOGO++;
3133 	elsiocb->cmd_cmpl = lpfc_cmpl_els_logo;
3134 	set_bit(NLP_LOGO_SND, &ndlp->nlp_flag);
3135 	clear_bit(NLP_ISSUE_LOGO, &ndlp->nlp_flag);
3136 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
3137 	if (!elsiocb->ndlp) {
3138 		lpfc_els_free_iocb(phba, elsiocb);
3139 		goto err;
3140 	}
3141 
3142 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3143 			      "Issue LOGO:      did:x%x refcnt %d",
3144 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3145 
3146 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3147 	if (rc == IOCB_ERROR) {
3148 		lpfc_els_free_iocb(phba, elsiocb);
3149 		lpfc_nlp_put(ndlp);
3150 		goto err;
3151 	}
3152 
3153 	spin_lock_irq(&ndlp->lock);
3154 	ndlp->nlp_prev_state = ndlp->nlp_state;
3155 	spin_unlock_irq(&ndlp->lock);
3156 	lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
3157 	return 0;
3158 
3159 err:
3160 	clear_bit(NLP_LOGO_SND, &ndlp->nlp_flag);
3161 	return 1;
3162 }
3163 
3164 /**
3165  * lpfc_cmpl_els_cmd - Completion callback function for generic els command
3166  * @phba: pointer to lpfc hba data structure.
3167  * @cmdiocb: pointer to lpfc command iocb data structure.
3168  * @rspiocb: pointer to lpfc response iocb data structure.
3169  *
3170  * This routine is a generic completion callback function for ELS commands.
3171  * Specifically, it is the callback function which does not need to perform
3172  * any command specific operations. It is currently used by the ELS command
3173  * issuing routines for RSCN, lpfc_issue_els_rscn, and the ELS Fibre Channel
3174  * Address Resolution Protocol Response (FARPR) routine, lpfc_issue_els_farpr().
3175  * Other than certain debug loggings, this callback function simply invokes the
3176  * lpfc_els_chk_latt() routine to check whether link went down during the
3177  * discovery process.
3178  **/
3179 static void
lpfc_cmpl_els_cmd(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)3180 lpfc_cmpl_els_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3181 		  struct lpfc_iocbq *rspiocb)
3182 {
3183 	struct lpfc_vport *vport = cmdiocb->vport;
3184 	struct lpfc_nodelist *free_ndlp;
3185 	IOCB_t *irsp;
3186 	u32 ulp_status, ulp_word4, tmo, did, iotag;
3187 
3188 	ulp_status = get_job_ulpstatus(phba, rspiocb);
3189 	ulp_word4 = get_job_word4(phba, rspiocb);
3190 	did = get_job_els_rsp64_did(phba, cmdiocb);
3191 
3192 	if (phba->sli_rev == LPFC_SLI_REV4) {
3193 		tmo = get_wqe_tmo(cmdiocb);
3194 		iotag = get_wqe_reqtag(cmdiocb);
3195 	} else {
3196 		irsp = &rspiocb->iocb;
3197 		tmo = irsp->ulpTimeout;
3198 		iotag = irsp->ulpIoTag;
3199 	}
3200 
3201 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3202 			      "ELS cmd cmpl:    status:x%x/x%x did:x%x",
3203 			      ulp_status, ulp_word4, did);
3204 
3205 	/* ELS cmd tag <ulpIoTag> completes */
3206 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3207 			 "0106 ELS cmd tag x%x completes Data: x%x x%x x%x\n",
3208 			 iotag, ulp_status, ulp_word4, tmo);
3209 
3210 	/* Check to see if link went down during discovery */
3211 	lpfc_els_chk_latt(vport);
3212 
3213 	free_ndlp = cmdiocb->ndlp;
3214 
3215 	lpfc_els_free_iocb(phba, cmdiocb);
3216 	lpfc_nlp_put(free_ndlp);
3217 }
3218 
3219 /**
3220  * lpfc_reg_fab_ctrl_node - RPI register the fabric controller node.
3221  * @vport: pointer to lpfc_vport data structure.
3222  * @fc_ndlp: pointer to the fabric controller (0xfffffd) node.
3223  *
3224  * This routine registers the rpi assigned to the fabric controller
3225  * NPort_ID (0xfffffd) with the port and moves the node to UNMAPPED
3226  * state triggering a registration with the SCSI transport.
3227  *
3228  * This routine is single out because the fabric controller node
3229  * does not receive a PLOGI.  This routine is consumed by the
3230  * SCR and RDF ELS commands.  Callers are expected to qualify
3231  * with SLI4 first.
3232  **/
3233 static int
lpfc_reg_fab_ctrl_node(struct lpfc_vport * vport,struct lpfc_nodelist * fc_ndlp)3234 lpfc_reg_fab_ctrl_node(struct lpfc_vport *vport, struct lpfc_nodelist *fc_ndlp)
3235 {
3236 	int rc;
3237 	struct lpfc_hba *phba = vport->phba;
3238 	struct lpfc_nodelist *ns_ndlp;
3239 	LPFC_MBOXQ_t *mbox;
3240 
3241 	if (test_bit(NLP_RPI_REGISTERED, &fc_ndlp->nlp_flag))
3242 		return 0;
3243 
3244 	ns_ndlp = lpfc_findnode_did(vport, NameServer_DID);
3245 	if (!ns_ndlp)
3246 		return -ENODEV;
3247 
3248 	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
3249 			 "0935 %s: Reg FC RPI x%x on FC DID x%x NSSte: x%x\n",
3250 			 __func__, fc_ndlp->nlp_rpi, fc_ndlp->nlp_DID,
3251 			 ns_ndlp->nlp_state);
3252 	if (ns_ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
3253 		return -ENODEV;
3254 
3255 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
3256 	if (!mbox) {
3257 		lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3258 				 "0936 %s: no memory for reg_login "
3259 				 "Data: x%x x%x x%lx x%x\n", __func__,
3260 				 fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3261 				 fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3262 		return -ENOMEM;
3263 	}
3264 	rc = lpfc_reg_rpi(phba, vport->vpi, fc_ndlp->nlp_DID,
3265 			  (u8 *)&vport->fc_sparam, mbox, fc_ndlp->nlp_rpi);
3266 	if (rc) {
3267 		rc = -EACCES;
3268 		goto out;
3269 	}
3270 
3271 	set_bit(NLP_REG_LOGIN_SEND, &fc_ndlp->nlp_flag);
3272 	mbox->mbox_cmpl = lpfc_mbx_cmpl_fc_reg_login;
3273 	mbox->ctx_ndlp = lpfc_nlp_get(fc_ndlp);
3274 	if (!mbox->ctx_ndlp) {
3275 		rc = -ENOMEM;
3276 		goto out;
3277 	}
3278 
3279 	mbox->vport = vport;
3280 	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
3281 	if (rc == MBX_NOT_FINISHED) {
3282 		rc = -ENODEV;
3283 		lpfc_nlp_put(fc_ndlp);
3284 		goto out;
3285 	}
3286 	/* Success path. Exit. */
3287 	lpfc_nlp_set_state(vport, fc_ndlp,
3288 			   NLP_STE_REG_LOGIN_ISSUE);
3289 	return 0;
3290 
3291  out:
3292 	lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
3293 	lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3294 			 "0938 %s: failed to format reg_login "
3295 			 "Data: x%x x%x x%lx x%x\n", __func__,
3296 			 fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3297 			 fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3298 	return rc;
3299 }
3300 
3301 /**
3302  * lpfc_cmpl_els_disc_cmd - Completion callback function for Discovery ELS cmd
3303  * @phba: pointer to lpfc hba data structure.
3304  * @cmdiocb: pointer to lpfc command iocb data structure.
3305  * @rspiocb: pointer to lpfc response iocb data structure.
3306  *
3307  * This routine is a generic completion callback function for Discovery ELS cmd.
3308  * Currently used by the ELS command issuing routines for the ELS State Change
3309  * Request (SCR), lpfc_issue_els_scr() and the ELS RDF, lpfc_issue_els_rdf().
3310  * These commands will be retried once only for ELS timeout errors.
3311  **/
3312 static void
lpfc_cmpl_els_disc_cmd(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)3313 lpfc_cmpl_els_disc_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3314 		       struct lpfc_iocbq *rspiocb)
3315 {
3316 	struct lpfc_vport *vport = cmdiocb->vport;
3317 	IOCB_t *irsp;
3318 	struct lpfc_els_rdf_rsp *prdf;
3319 	struct lpfc_dmabuf *pcmd, *prsp;
3320 	u32 *pdata;
3321 	u32 cmd;
3322 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
3323 	u32 ulp_status, ulp_word4, tmo, did, iotag;
3324 
3325 	ulp_status = get_job_ulpstatus(phba, rspiocb);
3326 	ulp_word4 = get_job_word4(phba, rspiocb);
3327 	did = get_job_els_rsp64_did(phba, cmdiocb);
3328 
3329 	if (phba->sli_rev == LPFC_SLI_REV4) {
3330 		tmo = get_wqe_tmo(cmdiocb);
3331 		iotag = get_wqe_reqtag(cmdiocb);
3332 	} else {
3333 		irsp = &rspiocb->iocb;
3334 		tmo = irsp->ulpTimeout;
3335 		iotag = irsp->ulpIoTag;
3336 	}
3337 
3338 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3339 		"ELS cmd cmpl:    status:x%x/x%x did:x%x",
3340 		ulp_status, ulp_word4, did);
3341 
3342 	/* ELS cmd tag <ulpIoTag> completes */
3343 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3344 			 "0217 ELS cmd tag x%x completes Data: x%x x%x x%x x%x\n",
3345 			 iotag, ulp_status, ulp_word4, tmo, cmdiocb->retry);
3346 
3347 	pcmd = cmdiocb->cmd_dmabuf;
3348 	if (!pcmd)
3349 		goto out;
3350 
3351 	pdata = (u32 *)pcmd->virt;
3352 	if (!pdata)
3353 		goto out;
3354 	cmd = *pdata;
3355 
3356 	/* Only 1 retry for ELS Timeout only */
3357 	if (ulp_status == IOSTAT_LOCAL_REJECT &&
3358 	    ((ulp_word4 & IOERR_PARAM_MASK) ==
3359 	    IOERR_SEQUENCE_TIMEOUT)) {
3360 		cmdiocb->retry++;
3361 		if (cmdiocb->retry <= 1) {
3362 			switch (cmd) {
3363 			case ELS_CMD_SCR:
3364 				lpfc_issue_els_scr(vport, cmdiocb->retry);
3365 				break;
3366 			case ELS_CMD_EDC:
3367 				lpfc_issue_els_edc(vport, cmdiocb->retry);
3368 				break;
3369 			case ELS_CMD_RDF:
3370 				lpfc_issue_els_rdf(vport, cmdiocb->retry);
3371 				break;
3372 			}
3373 			goto out;
3374 		}
3375 		phba->fc_stat.elsRetryExceeded++;
3376 	}
3377 	if (cmd == ELS_CMD_EDC) {
3378 		/* must be called before checking uplStatus and returning */
3379 		lpfc_cmpl_els_edc(phba, cmdiocb, rspiocb);
3380 		return;
3381 	}
3382 	if (ulp_status) {
3383 		/* ELS discovery cmd completes with error */
3384 		lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
3385 				 "4203 ELS cmd x%x error: x%x x%X\n", cmd,
3386 				 ulp_status, ulp_word4);
3387 		goto out;
3388 	}
3389 
3390 	/* The RDF response doesn't have any impact on the running driver
3391 	 * but the notification descriptors are dumped here for support.
3392 	 */
3393 	if (cmd == ELS_CMD_RDF) {
3394 		int i;
3395 
3396 		prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
3397 		if (!prsp)
3398 			goto out;
3399 
3400 		prdf = (struct lpfc_els_rdf_rsp *)prsp->virt;
3401 		if (!prdf)
3402 			goto out;
3403 		if (!lpfc_is_els_acc_rsp(prsp))
3404 			goto out;
3405 
3406 		for (i = 0; i < ELS_RDF_REG_TAG_CNT &&
3407 			    i < be32_to_cpu(prdf->reg_d1.reg_desc.count); i++)
3408 			lpfc_printf_vlog(vport, KERN_INFO,
3409 					 LOG_ELS | LOG_CGN_MGMT,
3410 					 "4677 Fabric RDF Notification Grant "
3411 					 "Data: 0x%08x Reg: %x %x\n",
3412 					 be32_to_cpu(
3413 						 prdf->reg_d1.desc_tags[i]),
3414 					 phba->cgn_reg_signal,
3415 					 phba->cgn_reg_fpin);
3416 	}
3417 
3418 out:
3419 	/* Check to see if link went down during discovery */
3420 	lpfc_els_chk_latt(vport);
3421 	lpfc_els_free_iocb(phba, cmdiocb);
3422 	lpfc_nlp_put(ndlp);
3423 	return;
3424 }
3425 
3426 /**
3427  * lpfc_issue_els_scr - Issue a scr to an node on a vport
3428  * @vport: pointer to a host virtual N_Port data structure.
3429  * @retry: retry counter for the command IOCB.
3430  *
3431  * This routine issues a State Change Request (SCR) to a fabric node
3432  * on a @vport. The remote node is Fabric Controller (0xfffffd). It
3433  * first search the @vport node list to find the matching ndlp. If no such
3434  * ndlp is found, a new ndlp shall be created for this (SCR) purpose. An
3435  * IOCB is allocated, payload prepared, and the lpfc_sli_issue_iocb()
3436  * routine is invoked to send the SCR IOCB.
3437  *
3438  * Note that the ndlp reference count will be incremented by 1 for holding the
3439  * ndlp and the reference to ndlp will be stored into the ndlp field of
3440  * the IOCB for the completion callback function to the SCR ELS command.
3441  *
3442  * Return code
3443  *   0 - Successfully issued scr command
3444  *   1 - Failed to issue scr command
3445  **/
3446 int
lpfc_issue_els_scr(struct lpfc_vport * vport,uint8_t retry)3447 lpfc_issue_els_scr(struct lpfc_vport *vport, uint8_t retry)
3448 {
3449 	int rc = 0;
3450 	struct lpfc_hba  *phba = vport->phba;
3451 	struct lpfc_iocbq *elsiocb;
3452 	uint8_t *pcmd;
3453 	uint16_t cmdsize;
3454 	struct lpfc_nodelist *ndlp;
3455 
3456 	cmdsize = (sizeof(uint32_t) + sizeof(SCR));
3457 
3458 	ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3459 	if (!ndlp) {
3460 		ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3461 		if (!ndlp)
3462 			return 1;
3463 		lpfc_enqueue_node(vport, ndlp);
3464 	}
3465 
3466 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3467 				     ndlp->nlp_DID, ELS_CMD_SCR);
3468 	if (!elsiocb)
3469 		return 1;
3470 
3471 	if (phba->sli_rev == LPFC_SLI_REV4) {
3472 		rc = lpfc_reg_fab_ctrl_node(vport, ndlp);
3473 		if (rc) {
3474 			lpfc_els_free_iocb(phba, elsiocb);
3475 			lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3476 					 "0937 %s: Failed to reg fc node, rc %d\n",
3477 					 __func__, rc);
3478 			return 1;
3479 		}
3480 	}
3481 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
3482 
3483 	*((uint32_t *) (pcmd)) = ELS_CMD_SCR;
3484 	pcmd += sizeof(uint32_t);
3485 
3486 	/* For SCR, remainder of payload is SCR parameter page */
3487 	memset(pcmd, 0, sizeof(SCR));
3488 	((SCR *) pcmd)->Function = SCR_FUNC_FULL;
3489 
3490 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3491 		"Issue SCR:       did:x%x",
3492 		ndlp->nlp_DID, 0, 0);
3493 
3494 	phba->fc_stat.elsXmitSCR++;
3495 	elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
3496 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
3497 	if (!elsiocb->ndlp) {
3498 		lpfc_els_free_iocb(phba, elsiocb);
3499 		return 1;
3500 	}
3501 
3502 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3503 			      "Issue SCR:     did:x%x refcnt %d",
3504 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3505 
3506 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3507 	if (rc == IOCB_ERROR) {
3508 		lpfc_els_free_iocb(phba, elsiocb);
3509 		lpfc_nlp_put(ndlp);
3510 		return 1;
3511 	}
3512 
3513 	return 0;
3514 }
3515 
3516 /**
3517  * lpfc_issue_els_rscn - Issue an RSCN to the Fabric Controller (Fabric)
3518  *   or the other nport (pt2pt).
3519  * @vport: pointer to a host virtual N_Port data structure.
3520  * @retry: number of retries to the command IOCB.
3521  *
3522  * This routine issues a RSCN to the Fabric Controller (DID 0xFFFFFD)
3523  *  when connected to a fabric, or to the remote port when connected
3524  *  in point-to-point mode. When sent to the Fabric Controller, it will
3525  *  replay the RSCN to registered recipients.
3526  *
3527  * Note that the ndlp reference count will be incremented by 1 for holding the
3528  * ndlp and the reference to ndlp will be stored into the ndlp field of
3529  * the IOCB for the completion callback function to the RSCN ELS command.
3530  *
3531  * Return code
3532  *   0 - Successfully issued RSCN command
3533  *   1 - Failed to issue RSCN command
3534  **/
3535 int
lpfc_issue_els_rscn(struct lpfc_vport * vport,uint8_t retry)3536 lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry)
3537 {
3538 	int rc = 0;
3539 	struct lpfc_hba *phba = vport->phba;
3540 	struct lpfc_iocbq *elsiocb;
3541 	struct lpfc_nodelist *ndlp;
3542 	struct {
3543 		struct fc_els_rscn rscn;
3544 		struct fc_els_rscn_page portid;
3545 	} *event;
3546 	uint32_t nportid;
3547 	uint16_t cmdsize = sizeof(*event);
3548 
3549 	/* Not supported for private loop */
3550 	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP &&
3551 	    !test_bit(FC_PUBLIC_LOOP, &vport->fc_flag))
3552 		return 1;
3553 
3554 	if (test_bit(FC_PT2PT, &vport->fc_flag)) {
3555 		/* find any mapped nport - that would be the other nport */
3556 		ndlp = lpfc_findnode_mapped(vport);
3557 		if (!ndlp)
3558 			return 1;
3559 	} else {
3560 		nportid = FC_FID_FCTRL;
3561 		/* find the fabric controller node */
3562 		ndlp = lpfc_findnode_did(vport, nportid);
3563 		if (!ndlp) {
3564 			/* if one didn't exist, make one */
3565 			ndlp = lpfc_nlp_init(vport, nportid);
3566 			if (!ndlp)
3567 				return 1;
3568 			lpfc_enqueue_node(vport, ndlp);
3569 		}
3570 	}
3571 
3572 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3573 				     ndlp->nlp_DID, ELS_CMD_RSCN_XMT);
3574 
3575 	if (!elsiocb)
3576 		return 1;
3577 
3578 	event = elsiocb->cmd_dmabuf->virt;
3579 
3580 	event->rscn.rscn_cmd = ELS_RSCN;
3581 	event->rscn.rscn_page_len = sizeof(struct fc_els_rscn_page);
3582 	event->rscn.rscn_plen = cpu_to_be16(cmdsize);
3583 
3584 	nportid = vport->fc_myDID;
3585 	/* appears that page flags must be 0 for fabric to broadcast RSCN */
3586 	event->portid.rscn_page_flags = 0;
3587 	event->portid.rscn_fid[0] = (nportid & 0x00FF0000) >> 16;
3588 	event->portid.rscn_fid[1] = (nportid & 0x0000FF00) >> 8;
3589 	event->portid.rscn_fid[2] = nportid & 0x000000FF;
3590 
3591 	phba->fc_stat.elsXmitRSCN++;
3592 	elsiocb->cmd_cmpl = lpfc_cmpl_els_cmd;
3593 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
3594 	if (!elsiocb->ndlp) {
3595 		lpfc_els_free_iocb(phba, elsiocb);
3596 		return 1;
3597 	}
3598 
3599 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3600 			      "Issue RSCN:       did:x%x",
3601 			      ndlp->nlp_DID, 0, 0);
3602 
3603 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3604 	if (rc == IOCB_ERROR) {
3605 		lpfc_els_free_iocb(phba, elsiocb);
3606 		lpfc_nlp_put(ndlp);
3607 		return 1;
3608 	}
3609 
3610 	return 0;
3611 }
3612 
3613 /**
3614  * lpfc_issue_els_farpr - Issue a farp to an node on a vport
3615  * @vport: pointer to a host virtual N_Port data structure.
3616  * @nportid: N_Port identifier to the remote node.
3617  * @retry: number of retries to the command IOCB.
3618  *
3619  * This routine issues a Fibre Channel Address Resolution Response
3620  * (FARPR) to a node on a vport. The remote node N_Port identifier (@nportid)
3621  * is passed into the function. It first search the @vport node list to find
3622  * the matching ndlp. If no such ndlp is found, a new ndlp shall be created
3623  * for this (FARPR) purpose. An IOCB is allocated, payload prepared, and the
3624  * lpfc_sli_issue_iocb() routine is invoked to send the FARPR ELS command.
3625  *
3626  * Note that the ndlp reference count will be incremented by 1 for holding the
3627  * ndlp and the reference to ndlp will be stored into the ndlp field of
3628  * the IOCB for the completion callback function to the FARPR ELS command.
3629  *
3630  * Return code
3631  *   0 - Successfully issued farpr command
3632  *   1 - Failed to issue farpr command
3633  **/
3634 static int
lpfc_issue_els_farpr(struct lpfc_vport * vport,uint32_t nportid,uint8_t retry)3635 lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
3636 {
3637 	int rc = 0;
3638 	struct lpfc_hba  *phba = vport->phba;
3639 	struct lpfc_iocbq *elsiocb;
3640 	FARP *fp;
3641 	uint8_t *pcmd;
3642 	uint32_t *lp;
3643 	uint16_t cmdsize;
3644 	struct lpfc_nodelist *ondlp;
3645 	struct lpfc_nodelist *ndlp;
3646 
3647 	cmdsize = (sizeof(uint32_t) + sizeof(FARP));
3648 
3649 	ndlp = lpfc_findnode_did(vport, nportid);
3650 	if (!ndlp) {
3651 		ndlp = lpfc_nlp_init(vport, nportid);
3652 		if (!ndlp)
3653 			return 1;
3654 		lpfc_enqueue_node(vport, ndlp);
3655 	}
3656 
3657 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3658 				     ndlp->nlp_DID, ELS_CMD_FARPR);
3659 	if (!elsiocb)
3660 		return 1;
3661 
3662 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
3663 
3664 	*((uint32_t *) (pcmd)) = ELS_CMD_FARPR;
3665 	pcmd += sizeof(uint32_t);
3666 
3667 	/* Fill in FARPR payload */
3668 	fp = (FARP *) (pcmd);
3669 	memset(fp, 0, sizeof(FARP));
3670 	lp = (uint32_t *) pcmd;
3671 	*lp++ = be32_to_cpu(nportid);
3672 	*lp++ = be32_to_cpu(vport->fc_myDID);
3673 	fp->Rflags = 0;
3674 	fp->Mflags = (FARP_MATCH_PORT | FARP_MATCH_NODE);
3675 
3676 	memcpy(&fp->RportName, &vport->fc_portname, sizeof(struct lpfc_name));
3677 	memcpy(&fp->RnodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
3678 	ondlp = lpfc_findnode_did(vport, nportid);
3679 	if (ondlp) {
3680 		memcpy(&fp->OportName, &ondlp->nlp_portname,
3681 		       sizeof(struct lpfc_name));
3682 		memcpy(&fp->OnodeName, &ondlp->nlp_nodename,
3683 		       sizeof(struct lpfc_name));
3684 	}
3685 
3686 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3687 		"Issue FARPR:     did:x%x",
3688 		ndlp->nlp_DID, 0, 0);
3689 
3690 	phba->fc_stat.elsXmitFARPR++;
3691 	elsiocb->cmd_cmpl = lpfc_cmpl_els_cmd;
3692 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
3693 	if (!elsiocb->ndlp) {
3694 		lpfc_els_free_iocb(phba, elsiocb);
3695 		return 1;
3696 	}
3697 
3698 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3699 	if (rc == IOCB_ERROR) {
3700 		/* The additional lpfc_nlp_put will cause the following
3701 		 * lpfc_els_free_iocb routine to trigger the release of
3702 		 * the node.
3703 		 */
3704 		lpfc_els_free_iocb(phba, elsiocb);
3705 		lpfc_nlp_put(ndlp);
3706 		return 1;
3707 	}
3708 	/* This will cause the callback-function lpfc_cmpl_els_cmd to
3709 	 * trigger the release of the node.
3710 	 */
3711 	/* Don't release reference count as RDF is likely outstanding */
3712 	return 0;
3713 }
3714 
3715 /**
3716  * lpfc_issue_els_rdf - Register for diagnostic functions from the fabric.
3717  * @vport: pointer to a host virtual N_Port data structure.
3718  * @retry: retry counter for the command IOCB.
3719  *
3720  * This routine issues an ELS RDF to the Fabric Controller to register
3721  * for diagnostic functions.
3722  *
3723  * Note that the ndlp reference count will be incremented by 1 for holding the
3724  * ndlp and the reference to ndlp will be stored into the ndlp field of
3725  * the IOCB for the completion callback function to the RDF ELS command.
3726  *
3727  * Return code
3728  *   0 - Successfully issued rdf command
3729  *   1 - Failed to issue rdf command
3730  **/
3731 int
lpfc_issue_els_rdf(struct lpfc_vport * vport,uint8_t retry)3732 lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry)
3733 {
3734 	struct lpfc_hba *phba = vport->phba;
3735 	struct lpfc_iocbq *elsiocb;
3736 	struct lpfc_els_rdf_req *prdf;
3737 	struct lpfc_nodelist *ndlp;
3738 	uint16_t cmdsize;
3739 	int rc;
3740 
3741 	cmdsize = sizeof(*prdf);
3742 
3743 	ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3744 	if (!ndlp) {
3745 		ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3746 		if (!ndlp)
3747 			return -ENODEV;
3748 		lpfc_enqueue_node(vport, ndlp);
3749 	}
3750 
3751 	/* RDF ELS is not required on an NPIV VN_Port. */
3752 	if (vport->port_type == LPFC_NPIV_PORT)
3753 		return -EACCES;
3754 
3755 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3756 				     ndlp->nlp_DID, ELS_CMD_RDF);
3757 	if (!elsiocb)
3758 		return -ENOMEM;
3759 
3760 	/* Configure the payload for the supported FPIN events. */
3761 	prdf = (struct lpfc_els_rdf_req *)elsiocb->cmd_dmabuf->virt;
3762 	memset(prdf, 0, cmdsize);
3763 	prdf->rdf.fpin_cmd = ELS_RDF;
3764 	prdf->rdf.desc_len = cpu_to_be32(sizeof(struct lpfc_els_rdf_req) -
3765 					 sizeof(struct fc_els_rdf));
3766 	prdf->reg_d1.reg_desc.desc_tag = cpu_to_be32(ELS_DTAG_FPIN_REGISTER);
3767 	prdf->reg_d1.reg_desc.desc_len = cpu_to_be32(
3768 				FC_TLV_DESC_LENGTH_FROM_SZ(prdf->reg_d1));
3769 	prdf->reg_d1.reg_desc.count = cpu_to_be32(ELS_RDF_REG_TAG_CNT);
3770 	prdf->reg_d1.desc_tags[0] = cpu_to_be32(ELS_DTAG_LNK_INTEGRITY);
3771 	prdf->reg_d1.desc_tags[1] = cpu_to_be32(ELS_DTAG_DELIVERY);
3772 	prdf->reg_d1.desc_tags[2] = cpu_to_be32(ELS_DTAG_PEER_CONGEST);
3773 	prdf->reg_d1.desc_tags[3] = cpu_to_be32(ELS_DTAG_CONGESTION);
3774 
3775 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3776 			 "6444 Xmit RDF to remote NPORT x%x Reg: %x %x\n",
3777 			 ndlp->nlp_DID, phba->cgn_reg_signal,
3778 			 phba->cgn_reg_fpin);
3779 
3780 	phba->cgn_fpin_frequency = LPFC_FPIN_INIT_FREQ;
3781 	elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
3782 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
3783 	if (!elsiocb->ndlp) {
3784 		lpfc_els_free_iocb(phba, elsiocb);
3785 		return -EIO;
3786 	}
3787 
3788 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3789 			      "Issue RDF:     did:x%x refcnt %d",
3790 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3791 
3792 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3793 	if (rc == IOCB_ERROR) {
3794 		lpfc_els_free_iocb(phba, elsiocb);
3795 		lpfc_nlp_put(ndlp);
3796 		return -EIO;
3797 	}
3798 	return 0;
3799 }
3800 
3801  /**
3802   * lpfc_els_rcv_rdf - Receive RDF ELS request from the fabric.
3803   * @vport: pointer to a host virtual N_Port data structure.
3804   * @cmdiocb: pointer to lpfc command iocb data structure.
3805   * @ndlp: pointer to a node-list data structure.
3806   *
3807   * A received RDF implies a possible change to fabric supported diagnostic
3808   * functions.  This routine sends LS_ACC and then has the Nx_Port issue a new
3809   * RDF request to reregister for supported diagnostic functions.
3810   *
3811   * Return code
3812   *   0 - Success
3813   *   -EIO - Failed to process received RDF
3814   **/
3815 static int
lpfc_els_rcv_rdf(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)3816 lpfc_els_rcv_rdf(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
3817 		 struct lpfc_nodelist *ndlp)
3818 {
3819 	/* Send LS_ACC */
3820 	if (lpfc_els_rsp_acc(vport, ELS_CMD_RDF, cmdiocb, ndlp, NULL)) {
3821 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3822 				 "1623 Failed to RDF_ACC from x%x for x%x\n",
3823 				 ndlp->nlp_DID, vport->fc_myDID);
3824 		return -EIO;
3825 	}
3826 
3827 	/* Issue new RDF for reregistering */
3828 	if (lpfc_issue_els_rdf(vport, 0)) {
3829 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3830 				 "2623 Failed to re register RDF for x%x\n",
3831 				 vport->fc_myDID);
3832 		return -EIO;
3833 	}
3834 
3835 	return 0;
3836 }
3837 
3838 /**
3839  * lpfc_least_capable_settings - helper function for EDC rsp processing
3840  * @phba: pointer to lpfc hba data structure.
3841  * @pcgd: pointer to congestion detection descriptor in EDC rsp.
3842  *
3843  * This helper routine determines the least capable setting for
3844  * congestion signals, signal freq, including scale, from the
3845  * congestion detection descriptor in the EDC rsp.  The routine
3846  * sets @phba values in preparation for a set_featues mailbox.
3847  **/
3848 static void
lpfc_least_capable_settings(struct lpfc_hba * phba,struct fc_diag_cg_sig_desc * pcgd)3849 lpfc_least_capable_settings(struct lpfc_hba *phba,
3850 			    struct fc_diag_cg_sig_desc *pcgd)
3851 {
3852 	u32 rsp_sig_cap = 0, drv_sig_cap = 0;
3853 	u32 rsp_sig_freq_cyc = 0, rsp_sig_freq_scale = 0;
3854 
3855 	/* Get rsp signal and frequency capabilities.  */
3856 	rsp_sig_cap = be32_to_cpu(pcgd->xmt_signal_capability);
3857 	rsp_sig_freq_cyc = be16_to_cpu(pcgd->xmt_signal_frequency.count);
3858 	rsp_sig_freq_scale = be16_to_cpu(pcgd->xmt_signal_frequency.units);
3859 
3860 	/* If the Fport does not support signals. Set FPIN only */
3861 	if (rsp_sig_cap == EDC_CG_SIG_NOTSUPPORTED)
3862 		goto out_no_support;
3863 
3864 	/* Apply the xmt scale to the xmt cycle to get the correct frequency.
3865 	 * Adapter default is 100 millisSeconds.  Convert all xmt cycle values
3866 	 * to milliSeconds.
3867 	 */
3868 	switch (rsp_sig_freq_scale) {
3869 	case EDC_CG_SIGFREQ_SEC:
3870 		rsp_sig_freq_cyc *= MSEC_PER_SEC;
3871 		break;
3872 	case EDC_CG_SIGFREQ_MSEC:
3873 		rsp_sig_freq_cyc = 1;
3874 		break;
3875 	default:
3876 		goto out_no_support;
3877 	}
3878 
3879 	/* Convenient shorthand. */
3880 	drv_sig_cap = phba->cgn_reg_signal;
3881 
3882 	/* Choose the least capable frequency. */
3883 	if (rsp_sig_freq_cyc > phba->cgn_sig_freq)
3884 		phba->cgn_sig_freq = rsp_sig_freq_cyc;
3885 
3886 	/* Should be some common signals support. Settle on least capable
3887 	 * signal and adjust FPIN values. Initialize defaults to ease the
3888 	 * decision.
3889 	 */
3890 	phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
3891 	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3892 	if (rsp_sig_cap == EDC_CG_SIG_WARN_ONLY &&
3893 	    (drv_sig_cap == EDC_CG_SIG_WARN_ONLY ||
3894 	     drv_sig_cap == EDC_CG_SIG_WARN_ALARM)) {
3895 		phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3896 		phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3897 	}
3898 	if (rsp_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3899 		if (drv_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3900 			phba->cgn_reg_signal = EDC_CG_SIG_WARN_ALARM;
3901 			phba->cgn_reg_fpin = LPFC_CGN_FPIN_NONE;
3902 		}
3903 		if (drv_sig_cap == EDC_CG_SIG_WARN_ONLY) {
3904 			phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3905 			phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3906 		}
3907 	}
3908 
3909 	/* We are NOT recording signal frequency in congestion info buffer */
3910 	return;
3911 
3912 out_no_support:
3913 	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3914 	phba->cgn_sig_freq = 0;
3915 	phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
3916 }
3917 
3918 DECLARE_ENUM2STR_LOOKUP(lpfc_get_tlv_dtag_nm, fc_ls_tlv_dtag,
3919 			FC_LS_TLV_DTAG_INIT);
3920 
3921 /**
3922  * lpfc_cmpl_els_edc - Completion callback function for EDC
3923  * @phba: pointer to lpfc hba data structure.
3924  * @cmdiocb: pointer to lpfc command iocb data structure.
3925  * @rspiocb: pointer to lpfc response iocb data structure.
3926  *
3927  * This routine is the completion callback function for issuing the Exchange
3928  * Diagnostic Capabilities (EDC) command. The driver issues an EDC to
3929  * notify the FPort of its Congestion and Link Fault capabilities.  This
3930  * routine parses the FPort's response and decides on the least common
3931  * values applicable to both FPort and NPort for Warnings and Alarms that
3932  * are communicated via hardware signals.
3933  **/
3934 static void
lpfc_cmpl_els_edc(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)3935 lpfc_cmpl_els_edc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3936 		  struct lpfc_iocbq *rspiocb)
3937 {
3938 	IOCB_t *irsp_iocb;
3939 	struct fc_els_edc_resp *edc_rsp;
3940 	struct fc_tlv_desc *tlv;
3941 	struct fc_diag_cg_sig_desc *pcgd;
3942 	struct fc_diag_lnkflt_desc *plnkflt;
3943 	struct lpfc_dmabuf *pcmd, *prsp;
3944 	const char *dtag_nm;
3945 	u32 *pdata, dtag;
3946 	int desc_cnt = 0, bytes_remain;
3947 	bool rcv_cap_desc = false;
3948 	struct lpfc_nodelist *ndlp;
3949 	u32 ulp_status, ulp_word4, tmo, did, iotag;
3950 
3951 	ndlp = cmdiocb->ndlp;
3952 
3953 	ulp_status = get_job_ulpstatus(phba, rspiocb);
3954 	ulp_word4 = get_job_word4(phba, rspiocb);
3955 	did = get_job_els_rsp64_did(phba, rspiocb);
3956 
3957 	if (phba->sli_rev == LPFC_SLI_REV4) {
3958 		tmo = get_wqe_tmo(rspiocb);
3959 		iotag = get_wqe_reqtag(rspiocb);
3960 	} else {
3961 		irsp_iocb = &rspiocb->iocb;
3962 		tmo = irsp_iocb->ulpTimeout;
3963 		iotag = irsp_iocb->ulpIoTag;
3964 	}
3965 
3966 	lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
3967 			      "EDC cmpl:    status:x%x/x%x did:x%x",
3968 			      ulp_status, ulp_word4, did);
3969 
3970 	/* ELS cmd tag <ulpIoTag> completes */
3971 	lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3972 			"4201 EDC cmd tag x%x completes Data: x%x x%x x%x\n",
3973 			iotag, ulp_status, ulp_word4, tmo);
3974 
3975 	pcmd = cmdiocb->cmd_dmabuf;
3976 	if (!pcmd)
3977 		goto out;
3978 
3979 	pdata = (u32 *)pcmd->virt;
3980 	if (!pdata)
3981 		goto out;
3982 
3983 	/* Need to clear signal values, send features MB and RDF with FPIN. */
3984 	if (ulp_status)
3985 		goto out;
3986 
3987 	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
3988 	if (!prsp)
3989 		goto out;
3990 
3991 	edc_rsp = prsp->virt;
3992 	if (!edc_rsp)
3993 		goto out;
3994 
3995 	/* ELS cmd tag <ulpIoTag> completes */
3996 	lpfc_printf_log(phba, KERN_INFO,
3997 			LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
3998 			"4676 Fabric EDC Rsp: "
3999 			"0x%02x, 0x%08x\n",
4000 			edc_rsp->acc_hdr.la_cmd,
4001 			be32_to_cpu(edc_rsp->desc_list_len));
4002 
4003 	if (!lpfc_is_els_acc_rsp(prsp))
4004 		goto out;
4005 
4006 	/*
4007 	 * Payload length in bytes is the response descriptor list
4008 	 * length minus the 12 bytes of Link Service Request
4009 	 * Information descriptor in the reply.
4010 	 */
4011 	bytes_remain = be32_to_cpu(edc_rsp->desc_list_len) -
4012 				   sizeof(struct fc_els_lsri_desc);
4013 	if (bytes_remain <= 0)
4014 		goto out;
4015 
4016 	tlv = edc_rsp->desc;
4017 
4018 	/*
4019 	 * cycle through EDC diagnostic descriptors to find the
4020 	 * congestion signaling capability descriptor
4021 	 */
4022 	while (bytes_remain) {
4023 		if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
4024 			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
4025 					"6461 Truncated TLV hdr on "
4026 					"Diagnostic descriptor[%d]\n",
4027 					desc_cnt);
4028 			goto out;
4029 		}
4030 
4031 		dtag = be32_to_cpu(tlv->desc_tag);
4032 		switch (dtag) {
4033 		case ELS_DTAG_LNK_FAULT_CAP:
4034 			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
4035 			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
4036 					sizeof(struct fc_diag_lnkflt_desc)) {
4037 				lpfc_printf_log(phba, KERN_WARNING,
4038 					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
4039 					"6462 Truncated Link Fault Diagnostic "
4040 					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
4041 					desc_cnt, bytes_remain,
4042 					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
4043 					sizeof(struct fc_diag_lnkflt_desc));
4044 				goto out;
4045 			}
4046 			plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
4047 			lpfc_printf_log(phba, KERN_INFO,
4048 				LOG_ELS | LOG_LDS_EVENT,
4049 				"4617 Link Fault Desc Data: 0x%08x 0x%08x "
4050 				"0x%08x 0x%08x 0x%08x\n",
4051 				be32_to_cpu(plnkflt->desc_tag),
4052 				be32_to_cpu(plnkflt->desc_len),
4053 				be32_to_cpu(
4054 					plnkflt->degrade_activate_threshold),
4055 				be32_to_cpu(
4056 					plnkflt->degrade_deactivate_threshold),
4057 				be32_to_cpu(plnkflt->fec_degrade_interval));
4058 			break;
4059 		case ELS_DTAG_CG_SIGNAL_CAP:
4060 			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
4061 			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
4062 					sizeof(struct fc_diag_cg_sig_desc)) {
4063 				lpfc_printf_log(
4064 					phba, KERN_WARNING, LOG_CGN_MGMT,
4065 					"6463 Truncated Cgn Signal Diagnostic "
4066 					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
4067 					desc_cnt, bytes_remain,
4068 					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
4069 					sizeof(struct fc_diag_cg_sig_desc));
4070 				goto out;
4071 			}
4072 
4073 			pcgd = (struct fc_diag_cg_sig_desc *)tlv;
4074 			lpfc_printf_log(
4075 				phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
4076 				"4616 CGN Desc Data: 0x%08x 0x%08x "
4077 				"0x%08x 0x%04x 0x%04x 0x%08x 0x%04x 0x%04x\n",
4078 				be32_to_cpu(pcgd->desc_tag),
4079 				be32_to_cpu(pcgd->desc_len),
4080 				be32_to_cpu(pcgd->xmt_signal_capability),
4081 				be16_to_cpu(pcgd->xmt_signal_frequency.count),
4082 				be16_to_cpu(pcgd->xmt_signal_frequency.units),
4083 				be32_to_cpu(pcgd->rcv_signal_capability),
4084 				be16_to_cpu(pcgd->rcv_signal_frequency.count),
4085 				be16_to_cpu(pcgd->rcv_signal_frequency.units));
4086 
4087 			/* Compare driver and Fport capabilities and choose
4088 			 * least common.
4089 			 */
4090 			lpfc_least_capable_settings(phba, pcgd);
4091 			rcv_cap_desc = true;
4092 			break;
4093 		default:
4094 			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
4095 			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
4096 					"4919 unknown Diagnostic "
4097 					"Descriptor[%d]: tag x%x (%s)\n",
4098 					desc_cnt, dtag, dtag_nm);
4099 		}
4100 
4101 		bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
4102 		tlv = fc_tlv_next_desc(tlv);
4103 		desc_cnt++;
4104 	}
4105 
4106 out:
4107 	if (!rcv_cap_desc) {
4108 		phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
4109 		phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4110 		phba->cgn_sig_freq = 0;
4111 		lpfc_printf_log(phba, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
4112 				"4202 EDC rsp error - sending RDF "
4113 				"for FPIN only.\n");
4114 	}
4115 
4116 	lpfc_config_cgn_signal(phba);
4117 
4118 	/* Check to see if link went down during discovery */
4119 	lpfc_els_chk_latt(phba->pport);
4120 	lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
4121 			      "EDC Cmpl:     did:x%x refcnt %d",
4122 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4123 	lpfc_els_free_iocb(phba, cmdiocb);
4124 	lpfc_nlp_put(ndlp);
4125 }
4126 
4127 static void
lpfc_format_edc_lft_desc(struct lpfc_hba * phba,struct fc_tlv_desc * tlv)4128 lpfc_format_edc_lft_desc(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
4129 {
4130 	struct fc_diag_lnkflt_desc *lft = (struct fc_diag_lnkflt_desc *)tlv;
4131 
4132 	lft->desc_tag = cpu_to_be32(ELS_DTAG_LNK_FAULT_CAP);
4133 	lft->desc_len = cpu_to_be32(
4134 		FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_lnkflt_desc));
4135 
4136 	lft->degrade_activate_threshold =
4137 		cpu_to_be32(phba->degrade_activate_threshold);
4138 	lft->degrade_deactivate_threshold =
4139 		cpu_to_be32(phba->degrade_deactivate_threshold);
4140 	lft->fec_degrade_interval = cpu_to_be32(phba->fec_degrade_interval);
4141 }
4142 
4143 static void
lpfc_format_edc_cgn_desc(struct lpfc_hba * phba,struct fc_tlv_desc * tlv)4144 lpfc_format_edc_cgn_desc(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
4145 {
4146 	struct fc_diag_cg_sig_desc *cgd = (struct fc_diag_cg_sig_desc *)tlv;
4147 
4148 	/* We are assuming cgd was zero'ed before calling this routine */
4149 
4150 	/* Configure the congestion detection capability */
4151 	cgd->desc_tag = cpu_to_be32(ELS_DTAG_CG_SIGNAL_CAP);
4152 
4153 	/* Descriptor len doesn't include the tag or len fields. */
4154 	cgd->desc_len = cpu_to_be32(
4155 		FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_cg_sig_desc));
4156 
4157 	/* xmt_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4158 	 * xmt_signal_frequency.count already set to 0.
4159 	 * xmt_signal_frequency.units already set to 0.
4160 	 */
4161 
4162 	if (phba->cmf_active_mode == LPFC_CFG_OFF) {
4163 		/* rcv_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4164 		 * rcv_signal_frequency.count already set to 0.
4165 		 * rcv_signal_frequency.units already set to 0.
4166 		 */
4167 		phba->cgn_sig_freq = 0;
4168 		return;
4169 	}
4170 	switch (phba->cgn_reg_signal) {
4171 	case EDC_CG_SIG_WARN_ONLY:
4172 		cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ONLY);
4173 		break;
4174 	case EDC_CG_SIG_WARN_ALARM:
4175 		cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ALARM);
4176 		break;
4177 	default:
4178 		/* rcv_signal_capability left 0 thus no support */
4179 		break;
4180 	}
4181 
4182 	/* We start negotiation with lpfc_fabric_cgn_frequency, after
4183 	 * the completion we settle on the higher frequency.
4184 	 */
4185 	cgd->rcv_signal_frequency.count =
4186 		cpu_to_be16(lpfc_fabric_cgn_frequency);
4187 	cgd->rcv_signal_frequency.units =
4188 		cpu_to_be16(EDC_CG_SIGFREQ_MSEC);
4189 }
4190 
4191 static bool
lpfc_link_is_lds_capable(struct lpfc_hba * phba)4192 lpfc_link_is_lds_capable(struct lpfc_hba *phba)
4193 {
4194 	if (!(phba->lmt & LMT_64Gb))
4195 		return false;
4196 	if (phba->sli_rev != LPFC_SLI_REV4)
4197 		return false;
4198 
4199 	if (phba->sli4_hba.conf_trunk) {
4200 		if (phba->trunk_link.phy_lnk_speed == LPFC_USER_LINK_SPEED_64G)
4201 			return true;
4202 	} else if (phba->fc_linkspeed == LPFC_LINK_SPEED_64GHZ) {
4203 		return true;
4204 	}
4205 	return false;
4206 }
4207 
4208  /**
4209   * lpfc_issue_els_edc - Exchange Diagnostic Capabilities with the fabric.
4210   * @vport: pointer to a host virtual N_Port data structure.
4211   * @retry: retry counter for the command iocb.
4212   *
4213   * This routine issues an ELS EDC to the F-Port Controller to communicate
4214   * this N_Port's support of hardware signals in its Congestion
4215   * Capabilities Descriptor.
4216   *
4217   * Note: This routine does not check if one or more signals are
4218   * set in the cgn_reg_signal parameter.  The caller makes the
4219   * decision to enforce cgn_reg_signal as nonzero or zero depending
4220   * on the conditions.  During Fabric requests, the driver
4221   * requires cgn_reg_signals to be nonzero.  But a dynamic request
4222   * to set the congestion mode to OFF from Monitor or Manage
4223   * would correctly issue an EDC with no signals enabled to
4224   * turn off switch functionality and then update the FW.
4225   *
4226   * Return code
4227   *   0 - Successfully issued edc command
4228   *   1 - Failed to issue edc command
4229   **/
4230 int
lpfc_issue_els_edc(struct lpfc_vport * vport,uint8_t retry)4231 lpfc_issue_els_edc(struct lpfc_vport *vport, uint8_t retry)
4232 {
4233 	struct lpfc_hba  *phba = vport->phba;
4234 	struct lpfc_iocbq *elsiocb;
4235 	struct fc_els_edc *edc_req;
4236 	struct fc_tlv_desc *tlv;
4237 	u16 cmdsize;
4238 	struct lpfc_nodelist *ndlp;
4239 	u8 *pcmd = NULL;
4240 	u32 cgn_desc_size, lft_desc_size;
4241 	int rc;
4242 
4243 	if (vport->port_type == LPFC_NPIV_PORT)
4244 		return -EACCES;
4245 
4246 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
4247 	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
4248 		return -ENODEV;
4249 
4250 	cgn_desc_size = (phba->cgn_init_reg_signal) ?
4251 				sizeof(struct fc_diag_cg_sig_desc) : 0;
4252 	lft_desc_size = (lpfc_link_is_lds_capable(phba)) ?
4253 				sizeof(struct fc_diag_lnkflt_desc) : 0;
4254 	cmdsize = cgn_desc_size + lft_desc_size;
4255 
4256 	/* Skip EDC if no applicable descriptors */
4257 	if (!cmdsize)
4258 		goto try_rdf;
4259 
4260 	cmdsize += sizeof(struct fc_els_edc);
4261 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
4262 				     ndlp->nlp_DID, ELS_CMD_EDC);
4263 	if (!elsiocb)
4264 		goto try_rdf;
4265 
4266 	/* Configure the payload for the supported Diagnostics capabilities. */
4267 	pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
4268 	memset(pcmd, 0, cmdsize);
4269 	edc_req = (struct fc_els_edc *)pcmd;
4270 	edc_req->desc_len = cpu_to_be32(cgn_desc_size + lft_desc_size);
4271 	edc_req->edc_cmd = ELS_EDC;
4272 	tlv = edc_req->desc;
4273 
4274 	if (cgn_desc_size) {
4275 		lpfc_format_edc_cgn_desc(phba, tlv);
4276 		phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
4277 		tlv = fc_tlv_next_desc(tlv);
4278 	}
4279 
4280 	if (lft_desc_size)
4281 		lpfc_format_edc_lft_desc(phba, tlv);
4282 
4283 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
4284 			 "4623 Xmit EDC to remote "
4285 			 "NPORT x%x reg_sig x%x reg_fpin:x%x\n",
4286 			 ndlp->nlp_DID, phba->cgn_reg_signal,
4287 			 phba->cgn_reg_fpin);
4288 
4289 	elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
4290 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
4291 	if (!elsiocb->ndlp) {
4292 		lpfc_els_free_iocb(phba, elsiocb);
4293 		return -EIO;
4294 	}
4295 
4296 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4297 			      "Issue EDC:     did:x%x refcnt %d",
4298 			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4299 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
4300 	if (rc == IOCB_ERROR) {
4301 		/* The additional lpfc_nlp_put will cause the following
4302 		 * lpfc_els_free_iocb routine to trigger the rlease of
4303 		 * the node.
4304 		 */
4305 		lpfc_els_free_iocb(phba, elsiocb);
4306 		lpfc_nlp_put(ndlp);
4307 		goto try_rdf;
4308 	}
4309 	return 0;
4310 try_rdf:
4311 	phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
4312 	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4313 	rc = lpfc_issue_els_rdf(vport, 0);
4314 	return rc;
4315 }
4316 
4317 /**
4318  * lpfc_cancel_retry_delay_tmo - Cancel the timer with delayed iocb-cmd retry
4319  * @vport: pointer to a host virtual N_Port data structure.
4320  * @nlp: pointer to a node-list data structure.
4321  *
4322  * This routine cancels the timer with a delayed IOCB-command retry for
4323  * a @vport's @ndlp. It stops the timer for the delayed function retrial and
4324  * removes the ELS retry event if it presents. In addition, if the
4325  * NLP_NPR_2B_DISC bit is set in the @nlp's nlp_flag bitmap, ADISC IOCB
4326  * commands are sent for the @vport's nodes that require issuing discovery
4327  * ADISC.
4328  **/
4329 void
lpfc_cancel_retry_delay_tmo(struct lpfc_vport * vport,struct lpfc_nodelist * nlp)4330 lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
4331 {
4332 	struct lpfc_work_evt *evtp;
4333 
4334 	if (!test_and_clear_bit(NLP_DELAY_TMO, &nlp->nlp_flag))
4335 		return;
4336 	del_timer_sync(&nlp->nlp_delayfunc);
4337 	nlp->nlp_last_elscmd = 0;
4338 	if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
4339 		list_del_init(&nlp->els_retry_evt.evt_listp);
4340 		/* Decrement nlp reference count held for the delayed retry */
4341 		evtp = &nlp->els_retry_evt;
4342 		lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
4343 	}
4344 	if (test_and_clear_bit(NLP_NPR_2B_DISC, &nlp->nlp_flag)) {
4345 		if (vport->num_disc_nodes) {
4346 			if (vport->port_state < LPFC_VPORT_READY) {
4347 				/* Check if there are more ADISCs to be sent */
4348 				lpfc_more_adisc(vport);
4349 			} else {
4350 				/* Check if there are more PLOGIs to be sent */
4351 				lpfc_more_plogi(vport);
4352 				if (vport->num_disc_nodes == 0) {
4353 					clear_bit(FC_NDISC_ACTIVE,
4354 						  &vport->fc_flag);
4355 					lpfc_can_disctmo(vport);
4356 					lpfc_end_rscn(vport);
4357 				}
4358 			}
4359 		}
4360 	}
4361 	return;
4362 }
4363 
4364 /**
4365  * lpfc_els_retry_delay - Timer function with a ndlp delayed function timer
4366  * @t: pointer to the timer function associated data (ndlp).
4367  *
4368  * This routine is invoked by the ndlp delayed-function timer to check
4369  * whether there is any pending ELS retry event(s) with the node. If not, it
4370  * simply returns. Otherwise, if there is at least one ELS delayed event, it
4371  * adds the delayed events to the HBA work list and invokes the
4372  * lpfc_worker_wake_up() routine to wake up worker thread to process the
4373  * event. Note that lpfc_nlp_get() is called before posting the event to
4374  * the work list to hold reference count of ndlp so that it guarantees the
4375  * reference to ndlp will still be available when the worker thread gets
4376  * to the event associated with the ndlp.
4377  **/
4378 void
lpfc_els_retry_delay(struct timer_list * t)4379 lpfc_els_retry_delay(struct timer_list *t)
4380 {
4381 	struct lpfc_nodelist *ndlp = from_timer(ndlp, t, nlp_delayfunc);
4382 	struct lpfc_vport *vport = ndlp->vport;
4383 	struct lpfc_hba   *phba = vport->phba;
4384 	unsigned long flags;
4385 	struct lpfc_work_evt  *evtp = &ndlp->els_retry_evt;
4386 
4387 	/* Hold a node reference for outstanding queued work */
4388 	if (!lpfc_nlp_get(ndlp))
4389 		return;
4390 
4391 	spin_lock_irqsave(&phba->hbalock, flags);
4392 	if (!list_empty(&evtp->evt_listp)) {
4393 		spin_unlock_irqrestore(&phba->hbalock, flags);
4394 		lpfc_nlp_put(ndlp);
4395 		return;
4396 	}
4397 
4398 	evtp->evt_arg1 = ndlp;
4399 	evtp->evt = LPFC_EVT_ELS_RETRY;
4400 	list_add_tail(&evtp->evt_listp, &phba->work_list);
4401 	spin_unlock_irqrestore(&phba->hbalock, flags);
4402 
4403 	lpfc_worker_wake_up(phba);
4404 }
4405 
4406 /**
4407  * lpfc_els_retry_delay_handler - Work thread handler for ndlp delayed function
4408  * @ndlp: pointer to a node-list data structure.
4409  *
4410  * This routine is the worker-thread handler for processing the @ndlp delayed
4411  * event(s), posted by the lpfc_els_retry_delay() routine. It simply retrieves
4412  * the last ELS command from the associated ndlp and invokes the proper ELS
4413  * function according to the delayed ELS command to retry the command.
4414  **/
4415 void
lpfc_els_retry_delay_handler(struct lpfc_nodelist * ndlp)4416 lpfc_els_retry_delay_handler(struct lpfc_nodelist *ndlp)
4417 {
4418 	struct lpfc_vport *vport = ndlp->vport;
4419 	uint32_t cmd, retry;
4420 
4421 	spin_lock_irq(&ndlp->lock);
4422 	cmd = ndlp->nlp_last_elscmd;
4423 	ndlp->nlp_last_elscmd = 0;
4424 	spin_unlock_irq(&ndlp->lock);
4425 
4426 	if (!test_and_clear_bit(NLP_DELAY_TMO, &ndlp->nlp_flag))
4427 		return;
4428 
4429 	/*
4430 	 * If a discovery event readded nlp_delayfunc after timer
4431 	 * firing and before processing the timer, cancel the
4432 	 * nlp_delayfunc.
4433 	 */
4434 	del_timer_sync(&ndlp->nlp_delayfunc);
4435 	retry = ndlp->nlp_retry;
4436 	ndlp->nlp_retry = 0;
4437 
4438 	switch (cmd) {
4439 	case ELS_CMD_FLOGI:
4440 		lpfc_issue_els_flogi(vport, ndlp, retry);
4441 		break;
4442 	case ELS_CMD_PLOGI:
4443 		if (!lpfc_issue_els_plogi(vport, ndlp->nlp_DID, retry)) {
4444 			ndlp->nlp_prev_state = ndlp->nlp_state;
4445 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
4446 		}
4447 		break;
4448 	case ELS_CMD_ADISC:
4449 		if (!lpfc_issue_els_adisc(vport, ndlp, retry)) {
4450 			ndlp->nlp_prev_state = ndlp->nlp_state;
4451 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
4452 		}
4453 		break;
4454 	case ELS_CMD_PRLI:
4455 	case ELS_CMD_NVMEPRLI:
4456 		if (!lpfc_issue_els_prli(vport, ndlp, retry)) {
4457 			ndlp->nlp_prev_state = ndlp->nlp_state;
4458 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
4459 		}
4460 		break;
4461 	case ELS_CMD_LOGO:
4462 		if (!lpfc_issue_els_logo(vport, ndlp, retry)) {
4463 			ndlp->nlp_prev_state = ndlp->nlp_state;
4464 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
4465 		}
4466 		break;
4467 	case ELS_CMD_FDISC:
4468 		if (!test_bit(FC_VPORT_NEEDS_INIT_VPI, &vport->fc_flag))
4469 			lpfc_issue_els_fdisc(vport, ndlp, retry);
4470 		break;
4471 	}
4472 	return;
4473 }
4474 
4475 /**
4476  * lpfc_link_reset - Issue link reset
4477  * @vport: pointer to a virtual N_Port data structure.
4478  *
4479  * This routine performs link reset by sending INIT_LINK mailbox command.
4480  * For SLI-3 adapter, link attention interrupt is enabled before issuing
4481  * INIT_LINK mailbox command.
4482  *
4483  * Return code
4484  *   0 - Link reset initiated successfully
4485  *   1 - Failed to initiate link reset
4486  **/
4487 int
lpfc_link_reset(struct lpfc_vport * vport)4488 lpfc_link_reset(struct lpfc_vport *vport)
4489 {
4490 	struct lpfc_hba *phba = vport->phba;
4491 	LPFC_MBOXQ_t *mbox;
4492 	uint32_t control;
4493 	int rc;
4494 
4495 	lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
4496 			 "2851 Attempt link reset\n");
4497 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
4498 	if (!mbox) {
4499 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4500 				"2852 Failed to allocate mbox memory");
4501 		return 1;
4502 	}
4503 
4504 	/* Enable Link attention interrupts */
4505 	if (phba->sli_rev <= LPFC_SLI_REV3) {
4506 		spin_lock_irq(&phba->hbalock);
4507 		phba->sli.sli_flag |= LPFC_PROCESS_LA;
4508 		control = readl(phba->HCregaddr);
4509 		control |= HC_LAINT_ENA;
4510 		writel(control, phba->HCregaddr);
4511 		readl(phba->HCregaddr); /* flush */
4512 		spin_unlock_irq(&phba->hbalock);
4513 	}
4514 
4515 	lpfc_init_link(phba, mbox, phba->cfg_topology,
4516 		       phba->cfg_link_speed);
4517 	mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
4518 	mbox->vport = vport;
4519 	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
4520 	if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
4521 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4522 				"2853 Failed to issue INIT_LINK "
4523 				"mbox command, rc:x%x\n", rc);
4524 		mempool_free(mbox, phba->mbox_mem_pool);
4525 		return 1;
4526 	}
4527 
4528 	return 0;
4529 }
4530 
4531 /**
4532  * lpfc_els_retry - Make retry decision on an els command iocb
4533  * @phba: pointer to lpfc hba data structure.
4534  * @cmdiocb: pointer to lpfc command iocb data structure.
4535  * @rspiocb: pointer to lpfc response iocb data structure.
4536  *
4537  * This routine makes a retry decision on an ELS command IOCB, which has
4538  * failed. The following ELS IOCBs use this function for retrying the command
4539  * when previously issued command responsed with error status: FLOGI, PLOGI,
4540  * PRLI, ADISC and FDISC. Based on the ELS command type and the
4541  * returned error status, it makes the decision whether a retry shall be
4542  * issued for the command, and whether a retry shall be made immediately or
4543  * delayed. In the former case, the corresponding ELS command issuing-function
4544  * is called to retry the command. In the later case, the ELS command shall
4545  * be posted to the ndlp delayed event and delayed function timer set to the
4546  * ndlp for the delayed command issusing.
4547  *
4548  * Return code
4549  *   0 - No retry of els command is made
4550  *   1 - Immediate or delayed retry of els command is made
4551  **/
4552 static int
lpfc_els_retry(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)4553 lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
4554 	       struct lpfc_iocbq *rspiocb)
4555 {
4556 	struct lpfc_vport *vport = cmdiocb->vport;
4557 	union lpfc_wqe128 *irsp = &rspiocb->wqe;
4558 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
4559 	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf;
4560 	uint32_t *elscmd;
4561 	struct ls_rjt stat;
4562 	int retry = 0, maxretry = lpfc_max_els_tries, delay = 0;
4563 	int logerr = 0;
4564 	uint32_t cmd = 0;
4565 	uint32_t did;
4566 	int link_reset = 0, rc;
4567 	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
4568 	u32 ulp_word4 = get_job_word4(phba, rspiocb);
4569 	u8 rsn_code_exp = 0;
4570 
4571 
4572 	/* Note: cmd_dmabuf may be 0 for internal driver abort
4573 	 * of delays ELS command.
4574 	 */
4575 
4576 	if (pcmd && pcmd->virt) {
4577 		elscmd = (uint32_t *) (pcmd->virt);
4578 		cmd = *elscmd++;
4579 	}
4580 
4581 	if (ndlp)
4582 		did = ndlp->nlp_DID;
4583 	else {
4584 		/* We should only hit this case for retrying PLOGI */
4585 		did = get_job_els_rsp64_did(phba, rspiocb);
4586 		ndlp = lpfc_findnode_did(vport, did);
4587 		if (!ndlp && (cmd != ELS_CMD_PLOGI))
4588 			return 0;
4589 	}
4590 
4591 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4592 		"Retry ELS:       wd7:x%x wd4:x%x did:x%x",
4593 		*(((uint32_t *)irsp) + 7), ulp_word4, did);
4594 
4595 	switch (ulp_status) {
4596 	case IOSTAT_FCP_RSP_ERROR:
4597 		break;
4598 	case IOSTAT_REMOTE_STOP:
4599 		if (phba->sli_rev == LPFC_SLI_REV4) {
4600 			/* This IO was aborted by the target, we don't
4601 			 * know the rxid and because we did not send the
4602 			 * ABTS we cannot generate and RRQ.
4603 			 */
4604 			lpfc_set_rrq_active(phba, ndlp,
4605 					 cmdiocb->sli4_lxritag, 0, 0);
4606 		}
4607 		break;
4608 	case IOSTAT_LOCAL_REJECT:
4609 		switch ((ulp_word4 & IOERR_PARAM_MASK)) {
4610 		case IOERR_LOOP_OPEN_FAILURE:
4611 			if (cmd == ELS_CMD_PLOGI && cmdiocb->retry == 0)
4612 				delay = 1000;
4613 			retry = 1;
4614 			break;
4615 
4616 		case IOERR_ILLEGAL_COMMAND:
4617 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4618 					 "0124 Retry illegal cmd x%x "
4619 					 "retry:x%x delay:x%x\n",
4620 					 cmd, cmdiocb->retry, delay);
4621 			retry = 1;
4622 			/* All command's retry policy */
4623 			maxretry = 8;
4624 			if (cmdiocb->retry > 2)
4625 				delay = 1000;
4626 			break;
4627 
4628 		case IOERR_NO_RESOURCES:
4629 			logerr = 1; /* HBA out of resources */
4630 			retry = 1;
4631 			if (cmdiocb->retry > 100)
4632 				delay = 100;
4633 			maxretry = 250;
4634 			break;
4635 
4636 		case IOERR_ILLEGAL_FRAME:
4637 			delay = 100;
4638 			retry = 1;
4639 			break;
4640 
4641 		case IOERR_INVALID_RPI:
4642 			if (cmd == ELS_CMD_PLOGI &&
4643 			    did == NameServer_DID) {
4644 				/* Continue forever if plogi to */
4645 				/* the nameserver fails */
4646 				maxretry = 0;
4647 				delay = 100;
4648 			} else if (cmd == ELS_CMD_PRLI &&
4649 				   ndlp->nlp_state != NLP_STE_PRLI_ISSUE) {
4650 				/* State-command disagreement.  The PRLI was
4651 				 * failed with an invalid rpi meaning there
4652 				 * some unexpected state change.  Don't retry.
4653 				 */
4654 				maxretry = 0;
4655 				retry = 0;
4656 				break;
4657 			}
4658 			retry = 1;
4659 			break;
4660 
4661 		case IOERR_SEQUENCE_TIMEOUT:
4662 			if (cmd == ELS_CMD_PLOGI &&
4663 			    did == NameServer_DID &&
4664 			    (cmdiocb->retry + 1) == maxretry) {
4665 				/* Reset the Link */
4666 				link_reset = 1;
4667 				break;
4668 			}
4669 			retry = 1;
4670 			delay = 100;
4671 			break;
4672 		case IOERR_SLI_ABORTED:
4673 			/* Retry ELS PLOGI command?
4674 			 * Possibly the rport just wasn't ready.
4675 			 */
4676 			if (cmd == ELS_CMD_PLOGI) {
4677 				/* No retry if state change */
4678 				if (ndlp &&
4679 				    ndlp->nlp_state != NLP_STE_PLOGI_ISSUE)
4680 					goto out_retry;
4681 				retry = 1;
4682 				maxretry = 2;
4683 			}
4684 			break;
4685 		}
4686 		break;
4687 
4688 	case IOSTAT_NPORT_RJT:
4689 	case IOSTAT_FABRIC_RJT:
4690 		if (ulp_word4 & RJT_UNAVAIL_TEMP) {
4691 			retry = 1;
4692 			break;
4693 		}
4694 		break;
4695 
4696 	case IOSTAT_NPORT_BSY:
4697 	case IOSTAT_FABRIC_BSY:
4698 		logerr = 1; /* Fabric / Remote NPort out of resources */
4699 		retry = 1;
4700 		break;
4701 
4702 	case IOSTAT_LS_RJT:
4703 		stat.un.ls_rjt_error_be = cpu_to_be32(ulp_word4);
4704 		/* Added for Vendor specifc support
4705 		 * Just keep retrying for these Rsn / Exp codes
4706 		 */
4707 		if (test_bit(FC_PT2PT, &vport->fc_flag) &&
4708 		    cmd == ELS_CMD_NVMEPRLI) {
4709 			switch (stat.un.b.lsRjtRsnCode) {
4710 			case LSRJT_UNABLE_TPC:
4711 			case LSRJT_INVALID_CMD:
4712 			case LSRJT_LOGICAL_ERR:
4713 			case LSRJT_CMD_UNSUPPORTED:
4714 				lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
4715 						 "0168 NVME PRLI LS_RJT "
4716 						 "reason %x port doesn't "
4717 						 "support NVME, disabling NVME\n",
4718 						 stat.un.b.lsRjtRsnCode);
4719 				retry = 0;
4720 				set_bit(FC_PT2PT_NO_NVME, &vport->fc_flag);
4721 				goto out_retry;
4722 			}
4723 		}
4724 		switch (stat.un.b.lsRjtRsnCode) {
4725 		case LSRJT_UNABLE_TPC:
4726 			/* Special case for PRLI LS_RJTs. Recall that lpfc
4727 			 * uses a single routine to issue both PRLI FC4 types.
4728 			 * If the PRLI is rejected because that FC4 type
4729 			 * isn't really supported, don't retry and cause
4730 			 * multiple transport registrations.  Otherwise, parse
4731 			 * the reason code/reason code explanation and take the
4732 			 * appropriate action.
4733 			 */
4734 			lpfc_printf_vlog(vport, KERN_INFO,
4735 					 LOG_DISCOVERY | LOG_ELS | LOG_NODE,
4736 					 "0153 ELS cmd x%x LS_RJT by x%x. "
4737 					 "RsnCode x%x RsnCodeExp x%x\n",
4738 					 cmd, did, stat.un.b.lsRjtRsnCode,
4739 					 stat.un.b.lsRjtRsnCodeExp);
4740 
4741 			switch (stat.un.b.lsRjtRsnCodeExp) {
4742 			case LSEXP_CANT_GIVE_DATA:
4743 			case LSEXP_CMD_IN_PROGRESS:
4744 				if (cmd == ELS_CMD_PLOGI) {
4745 					delay = 1000;
4746 					maxretry = 48;
4747 				}
4748 				retry = 1;
4749 				break;
4750 			case LSEXP_REQ_UNSUPPORTED:
4751 			case LSEXP_NO_RSRC_ASSIGN:
4752 				/* These explanation codes get no retry. */
4753 				if (cmd == ELS_CMD_PRLI ||
4754 				    cmd == ELS_CMD_NVMEPRLI)
4755 					break;
4756 				fallthrough;
4757 			default:
4758 				/* Limit the delay and retry action to a limited
4759 				 * cmd set.  There are other ELS commands where
4760 				 * a retry is not expected.
4761 				 */
4762 				if (cmd == ELS_CMD_PLOGI ||
4763 				    cmd == ELS_CMD_PRLI ||
4764 				    cmd == ELS_CMD_NVMEPRLI) {
4765 					delay = 1000;
4766 					maxretry = lpfc_max_els_tries + 1;
4767 					retry = 1;
4768 				}
4769 				break;
4770 			}
4771 
4772 			if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4773 			  (cmd == ELS_CMD_FDISC) &&
4774 			  (stat.un.b.lsRjtRsnCodeExp == LSEXP_OUT_OF_RESOURCE)){
4775 				lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
4776 					      "0125 FDISC (x%x). "
4777 					      "Fabric out of resources\n",
4778 					      stat.un.lsRjtError);
4779 				lpfc_vport_set_state(vport,
4780 						     FC_VPORT_NO_FABRIC_RSCS);
4781 			}
4782 			break;
4783 
4784 		case LSRJT_LOGICAL_BSY:
4785 			rsn_code_exp = stat.un.b.lsRjtRsnCodeExp;
4786 			if ((cmd == ELS_CMD_PLOGI) ||
4787 			    (cmd == ELS_CMD_PRLI) ||
4788 			    (cmd == ELS_CMD_NVMEPRLI)) {
4789 				delay = 1000;
4790 				maxretry = 48;
4791 
4792 				/* An authentication LS_RJT reason code
4793 				 * explanation means some error in the
4794 				 * security settings end-to-end.  Reduce
4795 				 * the retry count to allow lpfc to clear
4796 				 * RSCN mode and not race with dev_loss.
4797 				 */
4798 				if (cmd == ELS_CMD_PLOGI &&
4799 				    rsn_code_exp == LSEXP_AUTH_REQ)
4800 					maxretry = 8;
4801 			} else if (cmd == ELS_CMD_FDISC) {
4802 				/* FDISC retry policy */
4803 				maxretry = 48;
4804 				if (cmdiocb->retry >= 32)
4805 					delay = 1000;
4806 			}
4807 			retry = 1;
4808 			break;
4809 
4810 		case LSRJT_LOGICAL_ERR:
4811 			/* There are some cases where switches return this
4812 			 * error when they are not ready and should be returning
4813 			 * Logical Busy. We should delay every time.
4814 			 */
4815 			if (cmd == ELS_CMD_FDISC &&
4816 			    stat.un.b.lsRjtRsnCodeExp == LSEXP_PORT_LOGIN_REQ) {
4817 				maxretry = 3;
4818 				delay = 1000;
4819 				retry = 1;
4820 			} else if (cmd == ELS_CMD_FLOGI &&
4821 				   stat.un.b.lsRjtRsnCodeExp ==
4822 						LSEXP_NOTHING_MORE) {
4823 				vport->fc_sparam.cmn.bbRcvSizeMsb &= 0xf;
4824 				retry = 1;
4825 				lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
4826 					      "0820 FLOGI (x%x). "
4827 					      "BBCredit Not Supported\n",
4828 					      stat.un.lsRjtError);
4829 			} else if (cmd == ELS_CMD_PLOGI) {
4830 				rsn_code_exp = stat.un.b.lsRjtRsnCodeExp;
4831 
4832 				/* An authentication LS_RJT reason code
4833 				 * explanation means some error in the
4834 				 * security settings end-to-end.  Reduce
4835 				 * the retry count to allow lpfc to clear
4836 				 * RSCN mode and not race with dev_loss.
4837 				 */
4838 				if (rsn_code_exp == LSEXP_AUTH_REQ) {
4839 					delay = 1000;
4840 					retry = 1;
4841 					maxretry = 8;
4842 				}
4843 			}
4844 			break;
4845 
4846 		case LSRJT_PROTOCOL_ERR:
4847 			if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4848 			  (cmd == ELS_CMD_FDISC) &&
4849 			  ((stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_PNAME) ||
4850 			  (stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_NPORT_ID))
4851 			  ) {
4852 				lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
4853 					      "0122 FDISC (x%x). "
4854 					      "Fabric Detected Bad WWN\n",
4855 					      stat.un.lsRjtError);
4856 				lpfc_vport_set_state(vport,
4857 						     FC_VPORT_FABRIC_REJ_WWN);
4858 			}
4859 			break;
4860 		case LSRJT_VENDOR_UNIQUE:
4861 			if ((stat.un.b.vendorUnique == 0x45) &&
4862 			    (cmd == ELS_CMD_FLOGI)) {
4863 				goto out_retry;
4864 			}
4865 			break;
4866 		case LSRJT_CMD_UNSUPPORTED:
4867 			/* lpfc nvmet returns this type of LS_RJT when it
4868 			 * receives an FCP PRLI because lpfc nvmet only
4869 			 * support NVME.  ELS request is terminated for FCP4
4870 			 * on this rport.
4871 			 */
4872 			if (stat.un.b.lsRjtRsnCodeExp ==
4873 			    LSEXP_REQ_UNSUPPORTED) {
4874 				if (cmd == ELS_CMD_PRLI)
4875 					goto out_retry;
4876 			}
4877 			break;
4878 		}
4879 		break;
4880 
4881 	case IOSTAT_INTERMED_RSP:
4882 	case IOSTAT_BA_RJT:
4883 		break;
4884 
4885 	default:
4886 		break;
4887 	}
4888 
4889 	if (link_reset) {
4890 		rc = lpfc_link_reset(vport);
4891 		if (rc) {
4892 			/* Do not give up. Retry PLOGI one more time and attempt
4893 			 * link reset if PLOGI fails again.
4894 			 */
4895 			retry = 1;
4896 			delay = 100;
4897 			goto out_retry;
4898 		}
4899 		return 1;
4900 	}
4901 
4902 	if (did == FDMI_DID)
4903 		retry = 1;
4904 
4905 	if ((cmd == ELS_CMD_FLOGI) &&
4906 	    (phba->fc_topology != LPFC_TOPOLOGY_LOOP) &&
4907 	    !lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
4908 		/* FLOGI retry policy */
4909 		retry = 1;
4910 		/* retry FLOGI forever */
4911 		if (phba->link_flag != LS_LOOPBACK_MODE)
4912 			maxretry = 0;
4913 		else
4914 			maxretry = 2;
4915 
4916 		if (cmdiocb->retry >= 100)
4917 			delay = 5000;
4918 		else if (cmdiocb->retry >= 32)
4919 			delay = 1000;
4920 	} else if ((cmd == ELS_CMD_FDISC) &&
4921 	    !lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
4922 		/* retry FDISCs every second up to devloss */
4923 		retry = 1;
4924 		maxretry = vport->cfg_devloss_tmo;
4925 		delay = 1000;
4926 	}
4927 
4928 	cmdiocb->retry++;
4929 	if (maxretry && (cmdiocb->retry >= maxretry)) {
4930 		phba->fc_stat.elsRetryExceeded++;
4931 		retry = 0;
4932 	}
4933 
4934 	if (test_bit(FC_UNLOADING, &vport->load_flag))
4935 		retry = 0;
4936 
4937 out_retry:
4938 	if (retry) {
4939 		if ((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_FDISC)) {
4940 			/* Stop retrying PLOGI and FDISC if in FCF discovery */
4941 			if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
4942 				lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4943 						 "2849 Stop retry ELS command "
4944 						 "x%x to remote NPORT x%x, "
4945 						 "Data: x%x x%x\n", cmd, did,
4946 						 cmdiocb->retry, delay);
4947 				return 0;
4948 			}
4949 		}
4950 
4951 		/* Retry ELS command <elsCmd> to remote NPORT <did> */
4952 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4953 				 "0107 Retry ELS command x%x to remote "
4954 				 "NPORT x%x Data: x%x x%x\n",
4955 				 cmd, did, cmdiocb->retry, delay);
4956 
4957 		if (((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_ADISC)) &&
4958 			((ulp_status != IOSTAT_LOCAL_REJECT) ||
4959 			((ulp_word4 & IOERR_PARAM_MASK) !=
4960 			IOERR_NO_RESOURCES))) {
4961 			/* Don't reset timer for no resources */
4962 
4963 			/* If discovery / RSCN timer is running, reset it */
4964 			if (timer_pending(&vport->fc_disctmo) ||
4965 			    test_bit(FC_RSCN_MODE, &vport->fc_flag))
4966 				lpfc_set_disctmo(vport);
4967 		}
4968 
4969 		phba->fc_stat.elsXmitRetry++;
4970 		if (ndlp && delay) {
4971 			phba->fc_stat.elsDelayRetry++;
4972 			ndlp->nlp_retry = cmdiocb->retry;
4973 
4974 			/* delay is specified in milliseconds */
4975 			mod_timer(&ndlp->nlp_delayfunc,
4976 				jiffies + msecs_to_jiffies(delay));
4977 			set_bit(NLP_DELAY_TMO, &ndlp->nlp_flag);
4978 
4979 			ndlp->nlp_prev_state = ndlp->nlp_state;
4980 			if ((cmd == ELS_CMD_PRLI) ||
4981 			    (cmd == ELS_CMD_NVMEPRLI))
4982 				lpfc_nlp_set_state(vport, ndlp,
4983 					NLP_STE_PRLI_ISSUE);
4984 			else if (cmd != ELS_CMD_ADISC)
4985 				lpfc_nlp_set_state(vport, ndlp,
4986 					NLP_STE_NPR_NODE);
4987 			ndlp->nlp_last_elscmd = cmd;
4988 
4989 			return 1;
4990 		}
4991 		switch (cmd) {
4992 		case ELS_CMD_FLOGI:
4993 			lpfc_issue_els_flogi(vport, ndlp, cmdiocb->retry);
4994 			return 1;
4995 		case ELS_CMD_FDISC:
4996 			lpfc_issue_els_fdisc(vport, ndlp, cmdiocb->retry);
4997 			return 1;
4998 		case ELS_CMD_PLOGI:
4999 			if (ndlp) {
5000 				ndlp->nlp_prev_state = ndlp->nlp_state;
5001 				lpfc_nlp_set_state(vport, ndlp,
5002 						   NLP_STE_PLOGI_ISSUE);
5003 			}
5004 			lpfc_issue_els_plogi(vport, did, cmdiocb->retry);
5005 			return 1;
5006 		case ELS_CMD_ADISC:
5007 			ndlp->nlp_prev_state = ndlp->nlp_state;
5008 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
5009 			lpfc_issue_els_adisc(vport, ndlp, cmdiocb->retry);
5010 			return 1;
5011 		case ELS_CMD_PRLI:
5012 		case ELS_CMD_NVMEPRLI:
5013 			ndlp->nlp_prev_state = ndlp->nlp_state;
5014 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
5015 			lpfc_issue_els_prli(vport, ndlp, cmdiocb->retry);
5016 			return 1;
5017 		case ELS_CMD_LOGO:
5018 			ndlp->nlp_prev_state = ndlp->nlp_state;
5019 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
5020 			lpfc_issue_els_logo(vport, ndlp, cmdiocb->retry);
5021 			return 1;
5022 		}
5023 	}
5024 	/* No retry ELS command <elsCmd> to remote NPORT <did> */
5025 	if (logerr) {
5026 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5027 			 "0137 No retry ELS command x%x to remote "
5028 			 "NPORT x%x: Out of Resources: Error:x%x/%x "
5029 			 "IoTag x%x\n",
5030 			 cmd, did, ulp_status, ulp_word4,
5031 			 cmdiocb->iotag);
5032 	}
5033 	else {
5034 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5035 				 "0108 No retry ELS command x%x to remote "
5036 				 "NPORT x%x Retried:%d Error:x%x/%x "
5037 				 "IoTag x%x nflags x%lx\n",
5038 				 cmd, did, cmdiocb->retry, ulp_status,
5039 				 ulp_word4, cmdiocb->iotag,
5040 				 (ndlp ? ndlp->nlp_flag : 0));
5041 	}
5042 	return 0;
5043 }
5044 
5045 /**
5046  * lpfc_els_free_data - Free lpfc dma buffer and data structure with an iocb
5047  * @phba: pointer to lpfc hba data structure.
5048  * @buf_ptr1: pointer to the lpfc DMA buffer data structure.
5049  *
5050  * This routine releases the lpfc DMA (Direct Memory Access) buffer(s)
5051  * associated with a command IOCB back to the lpfc DMA buffer pool. It first
5052  * checks to see whether there is a lpfc DMA buffer associated with the
5053  * response of the command IOCB. If so, it will be released before releasing
5054  * the lpfc DMA buffer associated with the IOCB itself.
5055  *
5056  * Return code
5057  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
5058  **/
5059 static int
lpfc_els_free_data(struct lpfc_hba * phba,struct lpfc_dmabuf * buf_ptr1)5060 lpfc_els_free_data(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr1)
5061 {
5062 	struct lpfc_dmabuf *buf_ptr;
5063 
5064 	/* Free the response before processing the command. */
5065 	if (!list_empty(&buf_ptr1->list)) {
5066 		list_remove_head(&buf_ptr1->list, buf_ptr,
5067 				 struct lpfc_dmabuf,
5068 				 list);
5069 		lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
5070 		kfree(buf_ptr);
5071 	}
5072 	lpfc_mbuf_free(phba, buf_ptr1->virt, buf_ptr1->phys);
5073 	kfree(buf_ptr1);
5074 	return 0;
5075 }
5076 
5077 /**
5078  * lpfc_els_free_bpl - Free lpfc dma buffer and data structure with bpl
5079  * @phba: pointer to lpfc hba data structure.
5080  * @buf_ptr: pointer to the lpfc dma buffer data structure.
5081  *
5082  * This routine releases the lpfc Direct Memory Access (DMA) buffer
5083  * associated with a Buffer Pointer List (BPL) back to the lpfc DMA buffer
5084  * pool.
5085  *
5086  * Return code
5087  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
5088  **/
5089 static int
lpfc_els_free_bpl(struct lpfc_hba * phba,struct lpfc_dmabuf * buf_ptr)5090 lpfc_els_free_bpl(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr)
5091 {
5092 	lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
5093 	kfree(buf_ptr);
5094 	return 0;
5095 }
5096 
5097 /**
5098  * lpfc_els_free_iocb - Free a command iocb and its associated resources
5099  * @phba: pointer to lpfc hba data structure.
5100  * @elsiocb: pointer to lpfc els command iocb data structure.
5101  *
5102  * This routine frees a command IOCB and its associated resources. The
5103  * command IOCB data structure contains the reference to various associated
5104  * resources, these fields must be set to NULL if the associated reference
5105  * not present:
5106  *   cmd_dmabuf - reference to cmd.
5107  *   cmd_dmabuf->next - reference to rsp
5108  *   rsp_dmabuf - unused
5109  *   bpl_dmabuf - reference to bpl
5110  *
5111  * It first properly decrements the reference count held on ndlp for the
5112  * IOCB completion callback function. If LPFC_DELAY_MEM_FREE flag is not
5113  * set, it invokes the lpfc_els_free_data() routine to release the Direct
5114  * Memory Access (DMA) buffers associated with the IOCB. Otherwise, it
5115  * adds the DMA buffer the @phba data structure for the delayed release.
5116  * If reference to the Buffer Pointer List (BPL) is present, the
5117  * lpfc_els_free_bpl() routine is invoked to release the DMA memory
5118  * associated with BPL. Finally, the lpfc_sli_release_iocbq() routine is
5119  * invoked to release the IOCB data structure back to @phba IOCBQ list.
5120  *
5121  * Return code
5122  *   0 - Success (currently, always return 0)
5123  **/
5124 int
lpfc_els_free_iocb(struct lpfc_hba * phba,struct lpfc_iocbq * elsiocb)5125 lpfc_els_free_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *elsiocb)
5126 {
5127 	struct lpfc_dmabuf *buf_ptr, *buf_ptr1;
5128 
5129 	/* The I/O iocb is complete.  Clear the node and first dmbuf */
5130 	elsiocb->ndlp = NULL;
5131 
5132 	/* cmd_dmabuf = cmd,  cmd_dmabuf->next = rsp, bpl_dmabuf = bpl */
5133 	if (elsiocb->cmd_dmabuf) {
5134 		if (elsiocb->cmd_flag & LPFC_DELAY_MEM_FREE) {
5135 			/* Firmware could still be in progress of DMAing
5136 			 * payload, so don't free data buffer till after
5137 			 * a hbeat.
5138 			 */
5139 			elsiocb->cmd_flag &= ~LPFC_DELAY_MEM_FREE;
5140 			buf_ptr = elsiocb->cmd_dmabuf;
5141 			elsiocb->cmd_dmabuf = NULL;
5142 			if (buf_ptr) {
5143 				buf_ptr1 = NULL;
5144 				spin_lock_irq(&phba->hbalock);
5145 				if (!list_empty(&buf_ptr->list)) {
5146 					list_remove_head(&buf_ptr->list,
5147 						buf_ptr1, struct lpfc_dmabuf,
5148 						list);
5149 					INIT_LIST_HEAD(&buf_ptr1->list);
5150 					list_add_tail(&buf_ptr1->list,
5151 						&phba->elsbuf);
5152 					phba->elsbuf_cnt++;
5153 				}
5154 				INIT_LIST_HEAD(&buf_ptr->list);
5155 				list_add_tail(&buf_ptr->list, &phba->elsbuf);
5156 				phba->elsbuf_cnt++;
5157 				spin_unlock_irq(&phba->hbalock);
5158 			}
5159 		} else {
5160 			buf_ptr1 = elsiocb->cmd_dmabuf;
5161 			lpfc_els_free_data(phba, buf_ptr1);
5162 			elsiocb->cmd_dmabuf = NULL;
5163 		}
5164 	}
5165 
5166 	if (elsiocb->bpl_dmabuf) {
5167 		buf_ptr = elsiocb->bpl_dmabuf;
5168 		lpfc_els_free_bpl(phba, buf_ptr);
5169 		elsiocb->bpl_dmabuf = NULL;
5170 	}
5171 	lpfc_sli_release_iocbq(phba, elsiocb);
5172 	return 0;
5173 }
5174 
5175 /**
5176  * lpfc_cmpl_els_logo_acc - Completion callback function to logo acc response
5177  * @phba: pointer to lpfc hba data structure.
5178  * @cmdiocb: pointer to lpfc command iocb data structure.
5179  * @rspiocb: pointer to lpfc response iocb data structure.
5180  *
5181  * This routine is the completion callback function to the Logout (LOGO)
5182  * Accept (ACC) Response ELS command. This routine is invoked to indicate
5183  * the completion of the LOGO process. If the node has transitioned to NPR,
5184  * this routine unregisters the RPI if it is still registered. The
5185  * lpfc_els_free_iocb() is invoked to release the IOCB data structure.
5186  **/
5187 static void
lpfc_cmpl_els_logo_acc(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)5188 lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5189 		       struct lpfc_iocbq *rspiocb)
5190 {
5191 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
5192 	struct lpfc_vport *vport = cmdiocb->vport;
5193 	u32 ulp_status, ulp_word4;
5194 
5195 	ulp_status = get_job_ulpstatus(phba, rspiocb);
5196 	ulp_word4 = get_job_word4(phba, rspiocb);
5197 
5198 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5199 		"ACC LOGO cmpl:   status:x%x/x%x did:x%x",
5200 		ulp_status, ulp_word4, ndlp->nlp_DID);
5201 	/* ACC to LOGO completes to NPort <nlp_DID> */
5202 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5203 			 "0109 ACC to LOGO completes to NPort x%x refcnt %d "
5204 			 "last els x%x Data: x%lx x%x x%x\n",
5205 			 ndlp->nlp_DID, kref_read(&ndlp->kref),
5206 			 ndlp->nlp_last_elscmd, ndlp->nlp_flag, ndlp->nlp_state,
5207 			 ndlp->nlp_rpi);
5208 
5209 	/* This clause allows the LOGO ACC to complete and free resources
5210 	 * for the Fabric Domain Controller.  It does deliberately skip
5211 	 * the unreg_rpi and release rpi because some fabrics send RDP
5212 	 * requests after logging out from the initiator.
5213 	 */
5214 	if (ndlp->nlp_type & NLP_FABRIC &&
5215 	    ((ndlp->nlp_DID & WELL_KNOWN_DID_MASK) != WELL_KNOWN_DID_MASK))
5216 		goto out;
5217 
5218 	if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
5219 		if (test_bit(NLP_RPI_REGISTERED, &ndlp->nlp_flag))
5220 			lpfc_unreg_rpi(vport, ndlp);
5221 
5222 		/* If came from PRLO, then PRLO_ACC is done.
5223 		 * Start rediscovery now.
5224 		 */
5225 		if (ndlp->nlp_last_elscmd == ELS_CMD_PRLO) {
5226 			set_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag);
5227 			ndlp->nlp_prev_state = ndlp->nlp_state;
5228 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
5229 			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
5230 		}
5231 	}
5232 
5233  out:
5234 	/*
5235 	 * The driver received a LOGO from the rport and has ACK'd it.
5236 	 * At this point, the driver is done so release the IOCB
5237 	 */
5238 	lpfc_els_free_iocb(phba, cmdiocb);
5239 	lpfc_nlp_put(ndlp);
5240 }
5241 
5242 /**
5243  * lpfc_mbx_cmpl_dflt_rpi - Completion callbk func for unreg dflt rpi mbox cmd
5244  * @phba: pointer to lpfc hba data structure.
5245  * @pmb: pointer to the driver internal queue element for mailbox command.
5246  *
5247  * This routine is the completion callback function for unregister default
5248  * RPI (Remote Port Index) mailbox command to the @phba. It simply releases
5249  * the associated lpfc Direct Memory Access (DMA) buffer back to the pool and
5250  * decrements the ndlp reference count held for this completion callback
5251  * function. After that, it invokes the lpfc_drop_node to check
5252  * whether it is appropriate to release the node.
5253  **/
5254 void
lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba * phba,LPFC_MBOXQ_t * pmb)5255 lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
5256 {
5257 	struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
5258 	u32 mbx_flag = pmb->mbox_flag;
5259 	u32 mbx_cmd = pmb->u.mb.mbxCommand;
5260 
5261 	if (ndlp) {
5262 		lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
5263 				 "0006 rpi x%x DID:%x flg:%lx %d x%px "
5264 				 "mbx_cmd x%x mbx_flag x%x x%px\n",
5265 				 ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
5266 				 kref_read(&ndlp->kref), ndlp, mbx_cmd,
5267 				 mbx_flag, pmb);
5268 
5269 		/* This ends the default/temporary RPI cleanup logic for this
5270 		 * ndlp and the node and rpi needs to be released. Free the rpi
5271 		 * first on an UNREG_LOGIN and then release the final
5272 		 * references.
5273 		 */
5274 		clear_bit(NLP_REG_LOGIN_SEND, &ndlp->nlp_flag);
5275 		if (mbx_cmd == MBX_UNREG_LOGIN)
5276 			clear_bit(NLP_UNREG_INP, &ndlp->nlp_flag);
5277 		lpfc_nlp_put(ndlp);
5278 		lpfc_drop_node(ndlp->vport, ndlp);
5279 	}
5280 
5281 	lpfc_mbox_rsrc_cleanup(phba, pmb, MBOX_THD_UNLOCKED);
5282 }
5283 
5284 /**
5285  * lpfc_cmpl_els_rsp - Completion callback function for els response iocb cmd
5286  * @phba: pointer to lpfc hba data structure.
5287  * @cmdiocb: pointer to lpfc command iocb data structure.
5288  * @rspiocb: pointer to lpfc response iocb data structure.
5289  *
5290  * This routine is the completion callback function for ELS Response IOCB
5291  * command. In normal case, this callback function just properly sets the
5292  * nlp_flag bitmap in the ndlp data structure, if the mbox command reference
5293  * field in the command IOCB is not NULL, the referred mailbox command will
5294  * be send out, and then invokes the lpfc_els_free_iocb() routine to release
5295  * the IOCB.
5296  **/
5297 static void
lpfc_cmpl_els_rsp(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)5298 lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5299 		  struct lpfc_iocbq *rspiocb)
5300 {
5301 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
5302 	struct lpfc_vport *vport = ndlp ? ndlp->vport : NULL;
5303 	struct Scsi_Host  *shost = vport ? lpfc_shost_from_vport(vport) : NULL;
5304 	IOCB_t  *irsp;
5305 	LPFC_MBOXQ_t *mbox = NULL;
5306 	u32 ulp_status, ulp_word4, tmo, did, iotag;
5307 
5308 	if (!vport) {
5309 		lpfc_printf_log(phba, KERN_WARNING, LOG_ELS,
5310 				"3177 null vport in ELS rsp\n");
5311 		goto out;
5312 	}
5313 	if (cmdiocb->context_un.mbox)
5314 		mbox = cmdiocb->context_un.mbox;
5315 
5316 	ulp_status = get_job_ulpstatus(phba, rspiocb);
5317 	ulp_word4 = get_job_word4(phba, rspiocb);
5318 	did = get_job_els_rsp64_did(phba, cmdiocb);
5319 
5320 	if (phba->sli_rev == LPFC_SLI_REV4) {
5321 		tmo = get_wqe_tmo(cmdiocb);
5322 		iotag = get_wqe_reqtag(cmdiocb);
5323 	} else {
5324 		irsp = &rspiocb->iocb;
5325 		tmo = irsp->ulpTimeout;
5326 		iotag = irsp->ulpIoTag;
5327 	}
5328 
5329 	/* Check to see if link went down during discovery */
5330 	if (!ndlp || lpfc_els_chk_latt(vport)) {
5331 		if (mbox)
5332 			lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
5333 		goto out;
5334 	}
5335 
5336 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5337 		"ELS rsp cmpl:    status:x%x/x%x did:x%x",
5338 		ulp_status, ulp_word4, did);
5339 	/* ELS response tag <ulpIoTag> completes */
5340 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5341 			 "0110 ELS response tag x%x completes "
5342 			 "Data: x%x x%x x%x x%x x%lx x%x x%x x%x %p %p\n",
5343 			 iotag, ulp_status, ulp_word4, tmo,
5344 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5345 			 ndlp->nlp_rpi, kref_read(&ndlp->kref), mbox, ndlp);
5346 	if (mbox) {
5347 		if (ulp_status == 0 &&
5348 		    test_bit(NLP_ACC_REGLOGIN, &ndlp->nlp_flag)) {
5349 			if (!lpfc_unreg_rpi(vport, ndlp) &&
5350 			    !test_bit(FC_PT2PT, &vport->fc_flag)) {
5351 				if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
5352 				    ndlp->nlp_state ==
5353 				     NLP_STE_REG_LOGIN_ISSUE) {
5354 					lpfc_printf_vlog(vport, KERN_INFO,
5355 							 LOG_DISCOVERY,
5356 							 "0314 PLOGI recov "
5357 							 "DID x%x "
5358 							 "Data: x%x x%x x%lx\n",
5359 							 ndlp->nlp_DID,
5360 							 ndlp->nlp_state,
5361 							 ndlp->nlp_rpi,
5362 							 ndlp->nlp_flag);
5363 					goto out_free_mbox;
5364 				}
5365 			}
5366 
5367 			/* Increment reference count to ndlp to hold the
5368 			 * reference to ndlp for the callback function.
5369 			 */
5370 			mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
5371 			if (!mbox->ctx_ndlp)
5372 				goto out_free_mbox;
5373 
5374 			mbox->vport = vport;
5375 			if (test_bit(NLP_RM_DFLT_RPI, &ndlp->nlp_flag)) {
5376 				mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
5377 				mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
5378 			} else {
5379 				mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
5380 				ndlp->nlp_prev_state = ndlp->nlp_state;
5381 				lpfc_nlp_set_state(vport, ndlp,
5382 					   NLP_STE_REG_LOGIN_ISSUE);
5383 			}
5384 
5385 			set_bit(NLP_REG_LOGIN_SEND, &ndlp->nlp_flag);
5386 			if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
5387 			    != MBX_NOT_FINISHED)
5388 				goto out;
5389 
5390 			/* Decrement the ndlp reference count we
5391 			 * set for this failed mailbox command.
5392 			 */
5393 			lpfc_nlp_put(ndlp);
5394 			clear_bit(NLP_REG_LOGIN_SEND, &ndlp->nlp_flag);
5395 
5396 			/* ELS rsp: Cannot issue reg_login for <NPortid> */
5397 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5398 				"0138 ELS rsp: Cannot issue reg_login for x%x "
5399 				"Data: x%lx x%x x%x\n",
5400 				ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5401 				ndlp->nlp_rpi);
5402 		}
5403 out_free_mbox:
5404 		lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
5405 	}
5406 out:
5407 	if (ndlp && shost) {
5408 		if (mbox)
5409 			clear_bit(NLP_ACC_REGLOGIN, &ndlp->nlp_flag);
5410 		clear_bit(NLP_RM_DFLT_RPI, &ndlp->nlp_flag);
5411 	}
5412 
5413 	/* An SLI4 NPIV instance wants to drop the node at this point under
5414 	 * these conditions because it doesn't need the login.
5415 	 */
5416 	if (phba->sli_rev == LPFC_SLI_REV4 &&
5417 	    vport && vport->port_type == LPFC_NPIV_PORT &&
5418 	    !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
5419 		if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE &&
5420 		    ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE &&
5421 		    ndlp->nlp_state != NLP_STE_PRLI_ISSUE) {
5422 			/* Drop ndlp if there is no planned or outstanding
5423 			 * issued PRLI.
5424 			 *
5425 			 * In cases when the ndlp is acting as both an initiator
5426 			 * and target function, let our issued PRLI determine
5427 			 * the final ndlp kref drop.
5428 			 */
5429 			lpfc_drop_node(vport, ndlp);
5430 		}
5431 	}
5432 
5433 	/* Release the originating I/O reference. */
5434 	lpfc_els_free_iocb(phba, cmdiocb);
5435 	lpfc_nlp_put(ndlp);
5436 	return;
5437 }
5438 
5439 /**
5440  * lpfc_els_rsp_acc - Prepare and issue an acc response iocb command
5441  * @vport: pointer to a host virtual N_Port data structure.
5442  * @flag: the els command code to be accepted.
5443  * @oldiocb: pointer to the original lpfc command iocb data structure.
5444  * @ndlp: pointer to a node-list data structure.
5445  * @mbox: pointer to the driver internal queue element for mailbox command.
5446  *
5447  * This routine prepares and issues an Accept (ACC) response IOCB
5448  * command. It uses the @flag to properly set up the IOCB field for the
5449  * specific ACC response command to be issued and invokes the
5450  * lpfc_sli_issue_iocb() routine to send out ACC response IOCB. If a
5451  * @mbox pointer is passed in, it will be put into the context_un.mbox
5452  * field of the IOCB for the completion callback function to issue the
5453  * mailbox command to the HBA later when callback is invoked.
5454  *
5455  * Note that the ndlp reference count will be incremented by 1 for holding the
5456  * ndlp and the reference to ndlp will be stored into the ndlp field of
5457  * the IOCB for the completion callback function to the corresponding
5458  * response ELS IOCB command.
5459  *
5460  * Return code
5461  *   0 - Successfully issued acc response
5462  *   1 - Failed to issue acc response
5463  **/
5464 int
lpfc_els_rsp_acc(struct lpfc_vport * vport,uint32_t flag,struct lpfc_iocbq * oldiocb,struct lpfc_nodelist * ndlp,LPFC_MBOXQ_t * mbox)5465 lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
5466 		 struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5467 		 LPFC_MBOXQ_t *mbox)
5468 {
5469 	struct lpfc_hba  *phba = vport->phba;
5470 	IOCB_t *icmd;
5471 	IOCB_t *oldcmd;
5472 	union lpfc_wqe128 *wqe;
5473 	union lpfc_wqe128 *oldwqe = &oldiocb->wqe;
5474 	struct lpfc_iocbq *elsiocb;
5475 	uint8_t *pcmd;
5476 	struct serv_parm *sp;
5477 	uint16_t cmdsize;
5478 	int rc;
5479 	ELS_PKT *els_pkt_ptr;
5480 	struct fc_els_rdf_resp *rdf_resp;
5481 
5482 	switch (flag) {
5483 	case ELS_CMD_ACC:
5484 		cmdsize = sizeof(uint32_t);
5485 		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5486 					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5487 		if (!elsiocb) {
5488 			clear_bit(NLP_LOGO_ACC, &ndlp->nlp_flag);
5489 			return 1;
5490 		}
5491 
5492 		if (phba->sli_rev == LPFC_SLI_REV4) {
5493 			wqe = &elsiocb->wqe;
5494 			/* XRI / rx_id */
5495 			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5496 			       bf_get(wqe_ctxt_tag,
5497 				      &oldwqe->xmit_els_rsp.wqe_com));
5498 
5499 			/* oxid */
5500 			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5501 			       bf_get(wqe_rcvoxid,
5502 				      &oldwqe->xmit_els_rsp.wqe_com));
5503 		} else {
5504 			icmd = &elsiocb->iocb;
5505 			oldcmd = &oldiocb->iocb;
5506 			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5507 			icmd->unsli3.rcvsli3.ox_id =
5508 				oldcmd->unsli3.rcvsli3.ox_id;
5509 		}
5510 
5511 		pcmd = elsiocb->cmd_dmabuf->virt;
5512 		*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5513 		pcmd += sizeof(uint32_t);
5514 
5515 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5516 			"Issue ACC:       did:x%x flg:x%lx",
5517 			ndlp->nlp_DID, ndlp->nlp_flag, 0);
5518 		break;
5519 	case ELS_CMD_FLOGI:
5520 	case ELS_CMD_PLOGI:
5521 		cmdsize = (sizeof(struct serv_parm) + sizeof(uint32_t));
5522 		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5523 					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5524 		if (!elsiocb)
5525 			return 1;
5526 
5527 		if (phba->sli_rev == LPFC_SLI_REV4) {
5528 			wqe = &elsiocb->wqe;
5529 			/* XRI / rx_id */
5530 			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5531 			       bf_get(wqe_ctxt_tag,
5532 				      &oldwqe->xmit_els_rsp.wqe_com));
5533 
5534 			/* oxid */
5535 			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5536 			       bf_get(wqe_rcvoxid,
5537 				      &oldwqe->xmit_els_rsp.wqe_com));
5538 		} else {
5539 			icmd = &elsiocb->iocb;
5540 			oldcmd = &oldiocb->iocb;
5541 			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5542 			icmd->unsli3.rcvsli3.ox_id =
5543 				oldcmd->unsli3.rcvsli3.ox_id;
5544 		}
5545 
5546 		pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
5547 
5548 		if (mbox)
5549 			elsiocb->context_un.mbox = mbox;
5550 
5551 		*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5552 		pcmd += sizeof(uint32_t);
5553 		sp = (struct serv_parm *)pcmd;
5554 
5555 		if (flag == ELS_CMD_FLOGI) {
5556 			/* Copy the received service parameters back */
5557 			memcpy(sp, &phba->fc_fabparam,
5558 			       sizeof(struct serv_parm));
5559 
5560 			/* Clear the F_Port bit */
5561 			sp->cmn.fPort = 0;
5562 
5563 			/* Mark all class service parameters as invalid */
5564 			sp->cls1.classValid = 0;
5565 			sp->cls2.classValid = 0;
5566 			sp->cls3.classValid = 0;
5567 			sp->cls4.classValid = 0;
5568 
5569 			/* Copy our worldwide names */
5570 			memcpy(&sp->portName, &vport->fc_sparam.portName,
5571 			       sizeof(struct lpfc_name));
5572 			memcpy(&sp->nodeName, &vport->fc_sparam.nodeName,
5573 			       sizeof(struct lpfc_name));
5574 		} else {
5575 			memcpy(pcmd, &vport->fc_sparam,
5576 			       sizeof(struct serv_parm));
5577 
5578 			sp->cmn.valid_vendor_ver_level = 0;
5579 			memset(sp->un.vendorVersion, 0,
5580 			       sizeof(sp->un.vendorVersion));
5581 			sp->cmn.bbRcvSizeMsb &= 0xF;
5582 
5583 			/* If our firmware supports this feature, convey that
5584 			 * info to the target using the vendor specific field.
5585 			 */
5586 			if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
5587 				sp->cmn.valid_vendor_ver_level = 1;
5588 				sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
5589 				sp->un.vv.flags =
5590 					cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
5591 			}
5592 		}
5593 
5594 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5595 			"Issue ACC FLOGI/PLOGI: did:x%x flg:x%lx",
5596 			ndlp->nlp_DID, ndlp->nlp_flag, 0);
5597 		break;
5598 	case ELS_CMD_PRLO:
5599 		cmdsize = sizeof(uint32_t) + sizeof(PRLO);
5600 		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5601 					     ndlp, ndlp->nlp_DID, ELS_CMD_PRLO);
5602 		if (!elsiocb)
5603 			return 1;
5604 
5605 		if (phba->sli_rev == LPFC_SLI_REV4) {
5606 			wqe = &elsiocb->wqe;
5607 			/* XRI / rx_id */
5608 			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5609 			       bf_get(wqe_ctxt_tag,
5610 				      &oldwqe->xmit_els_rsp.wqe_com));
5611 
5612 			/* oxid */
5613 			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5614 			       bf_get(wqe_rcvoxid,
5615 				      &oldwqe->xmit_els_rsp.wqe_com));
5616 		} else {
5617 			icmd = &elsiocb->iocb;
5618 			oldcmd = &oldiocb->iocb;
5619 			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5620 			icmd->unsli3.rcvsli3.ox_id =
5621 				oldcmd->unsli3.rcvsli3.ox_id;
5622 		}
5623 
5624 		pcmd = (u8 *) elsiocb->cmd_dmabuf->virt;
5625 
5626 		memcpy(pcmd, oldiocb->cmd_dmabuf->virt,
5627 		       sizeof(uint32_t) + sizeof(PRLO));
5628 		*((uint32_t *) (pcmd)) = ELS_CMD_PRLO_ACC;
5629 		els_pkt_ptr = (ELS_PKT *) pcmd;
5630 		els_pkt_ptr->un.prlo.acceptRspCode = PRLO_REQ_EXECUTED;
5631 
5632 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5633 			"Issue ACC PRLO:  did:x%x flg:x%lx",
5634 			ndlp->nlp_DID, ndlp->nlp_flag, 0);
5635 		break;
5636 	case ELS_CMD_RDF:
5637 		cmdsize = sizeof(*rdf_resp);
5638 		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5639 					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5640 		if (!elsiocb)
5641 			return 1;
5642 
5643 		if (phba->sli_rev == LPFC_SLI_REV4) {
5644 			wqe = &elsiocb->wqe;
5645 			/* XRI / rx_id */
5646 			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5647 			       bf_get(wqe_ctxt_tag,
5648 				      &oldwqe->xmit_els_rsp.wqe_com));
5649 
5650 			/* oxid */
5651 			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5652 			       bf_get(wqe_rcvoxid,
5653 				      &oldwqe->xmit_els_rsp.wqe_com));
5654 		} else {
5655 			icmd = &elsiocb->iocb;
5656 			oldcmd = &oldiocb->iocb;
5657 			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5658 			icmd->unsli3.rcvsli3.ox_id =
5659 				oldcmd->unsli3.rcvsli3.ox_id;
5660 		}
5661 
5662 		pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
5663 		rdf_resp = (struct fc_els_rdf_resp *)pcmd;
5664 		memset(rdf_resp, 0, sizeof(*rdf_resp));
5665 		rdf_resp->acc_hdr.la_cmd = ELS_LS_ACC;
5666 
5667 		/* FC-LS-5 specifies desc_list_len shall be set to 12 */
5668 		rdf_resp->desc_list_len = cpu_to_be32(12);
5669 
5670 		/* FC-LS-5 specifies LS REQ Information descriptor */
5671 		rdf_resp->lsri.desc_tag = cpu_to_be32(1);
5672 		rdf_resp->lsri.desc_len = cpu_to_be32(sizeof(u32));
5673 		rdf_resp->lsri.rqst_w0.cmd = ELS_RDF;
5674 		break;
5675 	default:
5676 		return 1;
5677 	}
5678 	if (test_bit(NLP_LOGO_ACC, &ndlp->nlp_flag)) {
5679 		if (!test_bit(NLP_RPI_REGISTERED, &ndlp->nlp_flag) &&
5680 		    !test_bit(NLP_REG_LOGIN_SEND, &ndlp->nlp_flag))
5681 			clear_bit(NLP_LOGO_ACC, &ndlp->nlp_flag);
5682 		elsiocb->cmd_cmpl = lpfc_cmpl_els_logo_acc;
5683 	} else {
5684 		elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5685 	}
5686 
5687 	phba->fc_stat.elsXmitACC++;
5688 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
5689 	if (!elsiocb->ndlp) {
5690 		lpfc_els_free_iocb(phba, elsiocb);
5691 		return 1;
5692 	}
5693 
5694 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5695 	if (rc == IOCB_ERROR) {
5696 		lpfc_els_free_iocb(phba, elsiocb);
5697 		lpfc_nlp_put(ndlp);
5698 		return 1;
5699 	}
5700 
5701 	/* Xmit ELS ACC response tag <ulpIoTag> */
5702 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5703 			 "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
5704 			 "XRI: x%x, DID: x%x, nlp_flag: x%lx nlp_state: x%x "
5705 			 "RPI: x%x, fc_flag x%lx refcnt %d\n",
5706 			 rc, elsiocb->iotag, elsiocb->sli4_xritag,
5707 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5708 			 ndlp->nlp_rpi, vport->fc_flag, kref_read(&ndlp->kref));
5709 	return 0;
5710 }
5711 
5712 /**
5713  * lpfc_els_rsp_reject - Prepare and issue a rjt response iocb command
5714  * @vport: pointer to a virtual N_Port data structure.
5715  * @rejectError: reject response to issue
5716  * @oldiocb: pointer to the original lpfc command iocb data structure.
5717  * @ndlp: pointer to a node-list data structure.
5718  * @mbox: pointer to the driver internal queue element for mailbox command.
5719  *
5720  * This routine prepares and issue an Reject (RJT) response IOCB
5721  * command. If a @mbox pointer is passed in, it will be put into the
5722  * context_un.mbox field of the IOCB for the completion callback function
5723  * to issue to the HBA later.
5724  *
5725  * Note that the ndlp reference count will be incremented by 1 for holding the
5726  * ndlp and the reference to ndlp will be stored into the ndlp field of
5727  * the IOCB for the completion callback function to the reject response
5728  * ELS IOCB command.
5729  *
5730  * Return code
5731  *   0 - Successfully issued reject response
5732  *   1 - Failed to issue reject response
5733  **/
5734 int
lpfc_els_rsp_reject(struct lpfc_vport * vport,uint32_t rejectError,struct lpfc_iocbq * oldiocb,struct lpfc_nodelist * ndlp,LPFC_MBOXQ_t * mbox)5735 lpfc_els_rsp_reject(struct lpfc_vport *vport, uint32_t rejectError,
5736 		    struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5737 		    LPFC_MBOXQ_t *mbox)
5738 {
5739 	int rc;
5740 	struct lpfc_hba  *phba = vport->phba;
5741 	IOCB_t *icmd;
5742 	IOCB_t *oldcmd;
5743 	union lpfc_wqe128 *wqe;
5744 	struct lpfc_iocbq *elsiocb;
5745 	uint8_t *pcmd;
5746 	uint16_t cmdsize;
5747 
5748 	cmdsize = 2 * sizeof(uint32_t);
5749 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5750 				     ndlp->nlp_DID, ELS_CMD_LS_RJT);
5751 	if (!elsiocb)
5752 		return 1;
5753 
5754 	if (phba->sli_rev == LPFC_SLI_REV4) {
5755 		wqe = &elsiocb->wqe;
5756 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
5757 		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
5758 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5759 		       get_job_rcvoxid(phba, oldiocb));
5760 	} else {
5761 		icmd = &elsiocb->iocb;
5762 		oldcmd = &oldiocb->iocb;
5763 		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5764 		icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5765 	}
5766 
5767 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
5768 
5769 	*((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
5770 	pcmd += sizeof(uint32_t);
5771 	*((uint32_t *) (pcmd)) = rejectError;
5772 
5773 	if (mbox)
5774 		elsiocb->context_un.mbox = mbox;
5775 
5776 	/* Xmit ELS RJT <err> response tag <ulpIoTag> */
5777 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5778 			 "0129 Xmit ELS RJT x%x response tag x%x "
5779 			 "xri x%x, did x%x, nlp_flag x%lx, nlp_state x%x, "
5780 			 "rpi x%x\n",
5781 			 rejectError, elsiocb->iotag,
5782 			 get_job_ulpcontext(phba, elsiocb), ndlp->nlp_DID,
5783 			 ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
5784 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5785 		"Issue LS_RJT:    did:x%x flg:x%lx err:x%x",
5786 		ndlp->nlp_DID, ndlp->nlp_flag, rejectError);
5787 
5788 	phba->fc_stat.elsXmitLSRJT++;
5789 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5790 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
5791 	if (!elsiocb->ndlp) {
5792 		lpfc_els_free_iocb(phba, elsiocb);
5793 		return 1;
5794 	}
5795 
5796 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5797 	if (rc == IOCB_ERROR) {
5798 		lpfc_els_free_iocb(phba, elsiocb);
5799 		lpfc_nlp_put(ndlp);
5800 		return 1;
5801 	}
5802 
5803 	return 0;
5804 }
5805 
5806  /**
5807   * lpfc_issue_els_edc_rsp - Exchange Diagnostic Capabilities with the fabric.
5808   * @vport: pointer to a host virtual N_Port data structure.
5809   * @cmdiocb: pointer to the original lpfc command iocb data structure.
5810   * @ndlp: NPort to where rsp is directed
5811   *
5812   * This routine issues an EDC ACC RSP to the F-Port Controller to communicate
5813   * this N_Port's support of hardware signals in its Congestion
5814   * Capabilities Descriptor.
5815   *
5816   * Return code
5817   *   0 - Successfully issued edc rsp command
5818   *   1 - Failed to issue edc rsp command
5819   **/
5820 static int
lpfc_issue_els_edc_rsp(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)5821 lpfc_issue_els_edc_rsp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
5822 		       struct lpfc_nodelist *ndlp)
5823 {
5824 	struct lpfc_hba  *phba = vport->phba;
5825 	struct fc_els_edc_resp *edc_rsp;
5826 	struct fc_tlv_desc *tlv;
5827 	struct lpfc_iocbq *elsiocb;
5828 	IOCB_t *icmd, *cmd;
5829 	union lpfc_wqe128 *wqe;
5830 	u32 cgn_desc_size, lft_desc_size;
5831 	u16 cmdsize;
5832 	uint8_t *pcmd;
5833 	int rc;
5834 
5835 	cmdsize = sizeof(struct fc_els_edc_resp);
5836 	cgn_desc_size = sizeof(struct fc_diag_cg_sig_desc);
5837 	lft_desc_size = (lpfc_link_is_lds_capable(phba)) ?
5838 				sizeof(struct fc_diag_lnkflt_desc) : 0;
5839 	cmdsize += cgn_desc_size + lft_desc_size;
5840 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, cmdiocb->retry,
5841 				     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5842 	if (!elsiocb)
5843 		return 1;
5844 
5845 	if (phba->sli_rev == LPFC_SLI_REV4) {
5846 		wqe = &elsiocb->wqe;
5847 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
5848 		       get_job_ulpcontext(phba, cmdiocb)); /* Xri / rx_id */
5849 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5850 		       get_job_rcvoxid(phba, cmdiocb));
5851 	} else {
5852 		icmd = &elsiocb->iocb;
5853 		cmd = &cmdiocb->iocb;
5854 		icmd->ulpContext = cmd->ulpContext; /* Xri / rx_id */
5855 		icmd->unsli3.rcvsli3.ox_id = cmd->unsli3.rcvsli3.ox_id;
5856 	}
5857 
5858 	pcmd = elsiocb->cmd_dmabuf->virt;
5859 	memset(pcmd, 0, cmdsize);
5860 
5861 	edc_rsp = (struct fc_els_edc_resp *)pcmd;
5862 	edc_rsp->acc_hdr.la_cmd = ELS_LS_ACC;
5863 	edc_rsp->desc_list_len = cpu_to_be32(sizeof(struct fc_els_lsri_desc) +
5864 						cgn_desc_size + lft_desc_size);
5865 	edc_rsp->lsri.desc_tag = cpu_to_be32(ELS_DTAG_LS_REQ_INFO);
5866 	edc_rsp->lsri.desc_len = cpu_to_be32(
5867 		FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_els_lsri_desc));
5868 	edc_rsp->lsri.rqst_w0.cmd = ELS_EDC;
5869 	tlv = edc_rsp->desc;
5870 	lpfc_format_edc_cgn_desc(phba, tlv);
5871 	tlv = fc_tlv_next_desc(tlv);
5872 	if (lft_desc_size)
5873 		lpfc_format_edc_lft_desc(phba, tlv);
5874 
5875 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5876 			      "Issue EDC ACC:      did:x%x flg:x%lx refcnt %d",
5877 			      ndlp->nlp_DID, ndlp->nlp_flag,
5878 			      kref_read(&ndlp->kref));
5879 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5880 
5881 	phba->fc_stat.elsXmitACC++;
5882 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
5883 	if (!elsiocb->ndlp) {
5884 		lpfc_els_free_iocb(phba, elsiocb);
5885 		return 1;
5886 	}
5887 
5888 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5889 	if (rc == IOCB_ERROR) {
5890 		lpfc_els_free_iocb(phba, elsiocb);
5891 		lpfc_nlp_put(ndlp);
5892 		return 1;
5893 	}
5894 
5895 	/* Xmit ELS ACC response tag <ulpIoTag> */
5896 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5897 			 "0152 Xmit EDC ACC response Status: x%x, IoTag: x%x, "
5898 			 "XRI: x%x, DID: x%x, nlp_flag: x%lx nlp_state: x%x "
5899 			 "RPI: x%x, fc_flag x%lx\n",
5900 			 rc, elsiocb->iotag, elsiocb->sli4_xritag,
5901 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5902 			 ndlp->nlp_rpi, vport->fc_flag);
5903 
5904 	return 0;
5905 }
5906 
5907 /**
5908  * lpfc_els_rsp_adisc_acc - Prepare and issue acc response to adisc iocb cmd
5909  * @vport: pointer to a virtual N_Port data structure.
5910  * @oldiocb: pointer to the original lpfc command iocb data structure.
5911  * @ndlp: pointer to a node-list data structure.
5912  *
5913  * This routine prepares and issues an Accept (ACC) response to Address
5914  * Discover (ADISC) ELS command. It simply prepares the payload of the IOCB
5915  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
5916  *
5917  * Note that the ndlp reference count will be incremented by 1 for holding the
5918  * ndlp and the reference to ndlp will be stored into the ndlp field of
5919  * the IOCB for the completion callback function to the ADISC Accept response
5920  * ELS IOCB command.
5921  *
5922  * Return code
5923  *   0 - Successfully issued acc adisc response
5924  *   1 - Failed to issue adisc acc response
5925  **/
5926 int
lpfc_els_rsp_adisc_acc(struct lpfc_vport * vport,struct lpfc_iocbq * oldiocb,struct lpfc_nodelist * ndlp)5927 lpfc_els_rsp_adisc_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
5928 		       struct lpfc_nodelist *ndlp)
5929 {
5930 	struct lpfc_hba  *phba = vport->phba;
5931 	ADISC *ap;
5932 	IOCB_t *icmd, *oldcmd;
5933 	union lpfc_wqe128 *wqe;
5934 	struct lpfc_iocbq *elsiocb;
5935 	uint8_t *pcmd;
5936 	uint16_t cmdsize;
5937 	int rc;
5938 	u32 ulp_context;
5939 
5940 	cmdsize = sizeof(uint32_t) + sizeof(ADISC);
5941 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5942 				     ndlp->nlp_DID, ELS_CMD_ACC);
5943 	if (!elsiocb)
5944 		return 1;
5945 
5946 	if (phba->sli_rev == LPFC_SLI_REV4) {
5947 		wqe = &elsiocb->wqe;
5948 		/* XRI / rx_id */
5949 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
5950 		       get_job_ulpcontext(phba, oldiocb));
5951 		ulp_context = get_job_ulpcontext(phba, elsiocb);
5952 		/* oxid */
5953 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5954 		       get_job_rcvoxid(phba, oldiocb));
5955 	} else {
5956 		icmd = &elsiocb->iocb;
5957 		oldcmd = &oldiocb->iocb;
5958 		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5959 		ulp_context = elsiocb->iocb.ulpContext;
5960 		icmd->unsli3.rcvsli3.ox_id =
5961 			oldcmd->unsli3.rcvsli3.ox_id;
5962 	}
5963 
5964 	/* Xmit ADISC ACC response tag <ulpIoTag> */
5965 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5966 			 "0130 Xmit ADISC ACC response iotag x%x xri: "
5967 			 "x%x, did x%x, nlp_flag x%lx, nlp_state x%x rpi x%x\n",
5968 			 elsiocb->iotag, ulp_context,
5969 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5970 			 ndlp->nlp_rpi);
5971 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
5972 
5973 	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5974 	pcmd += sizeof(uint32_t);
5975 
5976 	ap = (ADISC *) (pcmd);
5977 	ap->hardAL_PA = phba->fc_pref_ALPA;
5978 	memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
5979 	memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
5980 	ap->DID = be32_to_cpu(vport->fc_myDID);
5981 
5982 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5983 		      "Issue ACC ADISC: did:x%x flg:x%lx refcnt %d",
5984 		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
5985 
5986 	phba->fc_stat.elsXmitACC++;
5987 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5988 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
5989 	if (!elsiocb->ndlp) {
5990 		lpfc_els_free_iocb(phba, elsiocb);
5991 		return 1;
5992 	}
5993 
5994 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5995 	if (rc == IOCB_ERROR) {
5996 		lpfc_els_free_iocb(phba, elsiocb);
5997 		lpfc_nlp_put(ndlp);
5998 		return 1;
5999 	}
6000 
6001 	return 0;
6002 }
6003 
6004 /**
6005  * lpfc_els_rsp_prli_acc - Prepare and issue acc response to prli iocb cmd
6006  * @vport: pointer to a virtual N_Port data structure.
6007  * @oldiocb: pointer to the original lpfc command iocb data structure.
6008  * @ndlp: pointer to a node-list data structure.
6009  *
6010  * This routine prepares and issues an Accept (ACC) response to Process
6011  * Login (PRLI) ELS command. It simply prepares the payload of the IOCB
6012  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
6013  *
6014  * Note that the ndlp reference count will be incremented by 1 for holding the
6015  * ndlp and the reference to ndlp will be stored into the ndlp field of
6016  * the IOCB for the completion callback function to the PRLI Accept response
6017  * ELS IOCB command.
6018  *
6019  * Return code
6020  *   0 - Successfully issued acc prli response
6021  *   1 - Failed to issue acc prli response
6022  **/
6023 int
lpfc_els_rsp_prli_acc(struct lpfc_vport * vport,struct lpfc_iocbq * oldiocb,struct lpfc_nodelist * ndlp)6024 lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
6025 		      struct lpfc_nodelist *ndlp)
6026 {
6027 	struct lpfc_hba  *phba = vport->phba;
6028 	PRLI *npr;
6029 	struct lpfc_nvme_prli *npr_nvme;
6030 	lpfc_vpd_t *vpd;
6031 	IOCB_t *icmd;
6032 	IOCB_t *oldcmd;
6033 	union lpfc_wqe128 *wqe;
6034 	struct lpfc_iocbq *elsiocb;
6035 	uint8_t *pcmd;
6036 	uint16_t cmdsize;
6037 	uint32_t prli_fc4_req, *req_payload;
6038 	struct lpfc_dmabuf *req_buf;
6039 	int rc;
6040 	u32 elsrspcmd, ulp_context;
6041 
6042 	/* Need the incoming PRLI payload to determine if the ACC is for an
6043 	 * FC4 or NVME PRLI type.  The PRLI type is at word 1.
6044 	 */
6045 	req_buf = oldiocb->cmd_dmabuf;
6046 	req_payload = (((uint32_t *)req_buf->virt) + 1);
6047 
6048 	/* PRLI type payload is at byte 3 for FCP or NVME. */
6049 	prli_fc4_req = be32_to_cpu(*req_payload);
6050 	prli_fc4_req = (prli_fc4_req >> 24) & 0xff;
6051 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6052 			 "6127 PRLI_ACC:  Req Type x%x, Word1 x%08x\n",
6053 			 prli_fc4_req, *((uint32_t *)req_payload));
6054 
6055 	if (prli_fc4_req == PRLI_FCP_TYPE) {
6056 		cmdsize = sizeof(uint32_t) + sizeof(PRLI);
6057 		elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK));
6058 	} else if (prli_fc4_req == PRLI_NVME_TYPE) {
6059 		cmdsize = sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli);
6060 		elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_NVMEPRLI & ~ELS_RSP_MASK));
6061 	} else {
6062 		return 1;
6063 	}
6064 
6065 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6066 				     ndlp->nlp_DID, elsrspcmd);
6067 	if (!elsiocb)
6068 		return 1;
6069 
6070 	if (phba->sli_rev == LPFC_SLI_REV4) {
6071 		wqe = &elsiocb->wqe;
6072 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6073 		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6074 		ulp_context = get_job_ulpcontext(phba, elsiocb);
6075 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6076 		       get_job_rcvoxid(phba, oldiocb));
6077 	} else {
6078 		icmd = &elsiocb->iocb;
6079 		oldcmd = &oldiocb->iocb;
6080 		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6081 		ulp_context = elsiocb->iocb.ulpContext;
6082 		icmd->unsli3.rcvsli3.ox_id =
6083 			oldcmd->unsli3.rcvsli3.ox_id;
6084 	}
6085 
6086 	/* Xmit PRLI ACC response tag <ulpIoTag> */
6087 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6088 			 "0131 Xmit PRLI ACC response tag x%x xri x%x, "
6089 			 "did x%x, nlp_flag x%lx, nlp_state x%x, rpi x%x\n",
6090 			 elsiocb->iotag, ulp_context,
6091 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
6092 			 ndlp->nlp_rpi);
6093 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6094 	memset(pcmd, 0, cmdsize);
6095 
6096 	*((uint32_t *)(pcmd)) = elsrspcmd;
6097 	pcmd += sizeof(uint32_t);
6098 
6099 	/* For PRLI, remainder of payload is PRLI parameter page */
6100 	vpd = &phba->vpd;
6101 
6102 	if (prli_fc4_req == PRLI_FCP_TYPE) {
6103 		/*
6104 		 * If the remote port is a target and our firmware version
6105 		 * is 3.20 or later, set the following bits for FC-TAPE
6106 		 * support.
6107 		 */
6108 		npr = (PRLI *) pcmd;
6109 		if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
6110 		    (vpd->rev.feaLevelHigh >= 0x02)) {
6111 			npr->ConfmComplAllowed = 1;
6112 			npr->Retry = 1;
6113 			npr->TaskRetryIdReq = 1;
6114 		}
6115 		npr->acceptRspCode = PRLI_REQ_EXECUTED;
6116 
6117 		/* Set image pair for complementary pairs only. */
6118 		if (ndlp->nlp_type & NLP_FCP_TARGET)
6119 			npr->estabImagePair = 1;
6120 		else
6121 			npr->estabImagePair = 0;
6122 		npr->readXferRdyDis = 1;
6123 		npr->ConfmComplAllowed = 1;
6124 		npr->prliType = PRLI_FCP_TYPE;
6125 		npr->initiatorFunc = 1;
6126 
6127 		/* Xmit PRLI ACC response tag <ulpIoTag> */
6128 		lpfc_printf_vlog(vport, KERN_INFO,
6129 				 LOG_ELS | LOG_NODE | LOG_DISCOVERY,
6130 				 "6014 FCP issue PRLI ACC imgpair %d "
6131 				 "retry %d task %d\n",
6132 				 npr->estabImagePair,
6133 				 npr->Retry, npr->TaskRetryIdReq);
6134 
6135 	} else if (prli_fc4_req == PRLI_NVME_TYPE) {
6136 		/* Respond with an NVME PRLI Type */
6137 		npr_nvme = (struct lpfc_nvme_prli *) pcmd;
6138 		bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
6139 		bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
6140 		bf_set(prli_acc_rsp_code, npr_nvme, PRLI_REQ_EXECUTED);
6141 		if (phba->nvmet_support) {
6142 			bf_set(prli_tgt, npr_nvme, 1);
6143 			bf_set(prli_disc, npr_nvme, 1);
6144 			if (phba->cfg_nvme_enable_fb) {
6145 				bf_set(prli_fba, npr_nvme, 1);
6146 
6147 				/* TBD.  Target mode needs to post buffers
6148 				 * that support the configured first burst
6149 				 * byte size.
6150 				 */
6151 				bf_set(prli_fb_sz, npr_nvme,
6152 				       phba->cfg_nvmet_fb_size);
6153 			}
6154 		} else {
6155 			bf_set(prli_init, npr_nvme, 1);
6156 		}
6157 
6158 		lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
6159 				 "6015 NVME issue PRLI ACC word1 x%08x "
6160 				 "word4 x%08x word5 x%08x flag x%lx, "
6161 				 "fcp_info x%x nlp_type x%x\n",
6162 				 npr_nvme->word1, npr_nvme->word4,
6163 				 npr_nvme->word5, ndlp->nlp_flag,
6164 				 ndlp->nlp_fcp_info, ndlp->nlp_type);
6165 		npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
6166 		npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
6167 		npr_nvme->word5 = cpu_to_be32(npr_nvme->word5);
6168 	} else
6169 		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6170 				 "6128 Unknown FC_TYPE x%x x%x ndlp x%06x\n",
6171 				 prli_fc4_req, ndlp->nlp_fc4_type,
6172 				 ndlp->nlp_DID);
6173 
6174 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6175 		      "Issue ACC PRLI:  did:x%x flg:x%lx",
6176 		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6177 
6178 	phba->fc_stat.elsXmitACC++;
6179 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6180 	elsiocb->ndlp =  lpfc_nlp_get(ndlp);
6181 	if (!elsiocb->ndlp) {
6182 		lpfc_els_free_iocb(phba, elsiocb);
6183 		return 1;
6184 	}
6185 
6186 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6187 	if (rc == IOCB_ERROR) {
6188 		lpfc_els_free_iocb(phba, elsiocb);
6189 		lpfc_nlp_put(ndlp);
6190 		return 1;
6191 	}
6192 
6193 	return 0;
6194 }
6195 
6196 /**
6197  * lpfc_els_rsp_rnid_acc - Issue rnid acc response iocb command
6198  * @vport: pointer to a virtual N_Port data structure.
6199  * @format: rnid command format.
6200  * @oldiocb: pointer to the original lpfc command iocb data structure.
6201  * @ndlp: pointer to a node-list data structure.
6202  *
6203  * This routine issues a Request Node Identification Data (RNID) Accept
6204  * (ACC) response. It constructs the RNID ACC response command according to
6205  * the proper @format and then calls the lpfc_sli_issue_iocb() routine to
6206  * issue the response.
6207  *
6208  * Note that the ndlp reference count will be incremented by 1 for holding the
6209  * ndlp and the reference to ndlp will be stored into the ndlp field of
6210  * the IOCB for the completion callback function.
6211  *
6212  * Return code
6213  *   0 - Successfully issued acc rnid response
6214  *   1 - Failed to issue acc rnid response
6215  **/
6216 static int
lpfc_els_rsp_rnid_acc(struct lpfc_vport * vport,uint8_t format,struct lpfc_iocbq * oldiocb,struct lpfc_nodelist * ndlp)6217 lpfc_els_rsp_rnid_acc(struct lpfc_vport *vport, uint8_t format,
6218 		      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6219 {
6220 	struct lpfc_hba  *phba = vport->phba;
6221 	RNID *rn;
6222 	IOCB_t *icmd, *oldcmd;
6223 	union lpfc_wqe128 *wqe;
6224 	struct lpfc_iocbq *elsiocb;
6225 	uint8_t *pcmd;
6226 	uint16_t cmdsize;
6227 	int rc;
6228 	u32 ulp_context;
6229 
6230 	cmdsize = sizeof(uint32_t) + sizeof(uint32_t)
6231 					+ (2 * sizeof(struct lpfc_name));
6232 	if (format)
6233 		cmdsize += sizeof(RNID_TOP_DISC);
6234 
6235 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6236 				     ndlp->nlp_DID, ELS_CMD_ACC);
6237 	if (!elsiocb)
6238 		return 1;
6239 
6240 	if (phba->sli_rev == LPFC_SLI_REV4) {
6241 		wqe = &elsiocb->wqe;
6242 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6243 		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6244 		ulp_context = get_job_ulpcontext(phba, elsiocb);
6245 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6246 		       get_job_rcvoxid(phba, oldiocb));
6247 	} else {
6248 		icmd = &elsiocb->iocb;
6249 		oldcmd = &oldiocb->iocb;
6250 		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6251 		ulp_context = elsiocb->iocb.ulpContext;
6252 		icmd->unsli3.rcvsli3.ox_id =
6253 			oldcmd->unsli3.rcvsli3.ox_id;
6254 	}
6255 
6256 	/* Xmit RNID ACC response tag <ulpIoTag> */
6257 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6258 			 "0132 Xmit RNID ACC response tag x%x xri x%x\n",
6259 			 elsiocb->iotag, ulp_context);
6260 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6261 	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6262 	pcmd += sizeof(uint32_t);
6263 
6264 	memset(pcmd, 0, sizeof(RNID));
6265 	rn = (RNID *) (pcmd);
6266 	rn->Format = format;
6267 	rn->CommonLen = (2 * sizeof(struct lpfc_name));
6268 	memcpy(&rn->portName, &vport->fc_portname, sizeof(struct lpfc_name));
6269 	memcpy(&rn->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
6270 	switch (format) {
6271 	case 0:
6272 		rn->SpecificLen = 0;
6273 		break;
6274 	case RNID_TOPOLOGY_DISC:
6275 		rn->SpecificLen = sizeof(RNID_TOP_DISC);
6276 		memcpy(&rn->un.topologyDisc.portName,
6277 		       &vport->fc_portname, sizeof(struct lpfc_name));
6278 		rn->un.topologyDisc.unitType = RNID_HBA;
6279 		rn->un.topologyDisc.physPort = 0;
6280 		rn->un.topologyDisc.attachedNodes = 0;
6281 		break;
6282 	default:
6283 		rn->CommonLen = 0;
6284 		rn->SpecificLen = 0;
6285 		break;
6286 	}
6287 
6288 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6289 		      "Issue ACC RNID:  did:x%x flg:x%lx refcnt %d",
6290 		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6291 
6292 	phba->fc_stat.elsXmitACC++;
6293 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6294 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
6295 	if (!elsiocb->ndlp) {
6296 		lpfc_els_free_iocb(phba, elsiocb);
6297 		return 1;
6298 	}
6299 
6300 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6301 	if (rc == IOCB_ERROR) {
6302 		lpfc_els_free_iocb(phba, elsiocb);
6303 		lpfc_nlp_put(ndlp);
6304 		return 1;
6305 	}
6306 
6307 	return 0;
6308 }
6309 
6310 /**
6311  * lpfc_els_clear_rrq - Clear the rq that this rrq describes.
6312  * @vport: pointer to a virtual N_Port data structure.
6313  * @iocb: pointer to the lpfc command iocb data structure.
6314  * @ndlp: pointer to a node-list data structure.
6315  *
6316  * Return
6317  **/
6318 static void
lpfc_els_clear_rrq(struct lpfc_vport * vport,struct lpfc_iocbq * iocb,struct lpfc_nodelist * ndlp)6319 lpfc_els_clear_rrq(struct lpfc_vport *vport,
6320 		   struct lpfc_iocbq *iocb, struct lpfc_nodelist *ndlp)
6321 {
6322 	struct lpfc_hba  *phba = vport->phba;
6323 	uint8_t *pcmd;
6324 	struct RRQ *rrq;
6325 	uint16_t rxid;
6326 	uint16_t xri;
6327 	struct lpfc_node_rrq *prrq;
6328 
6329 
6330 	pcmd = (uint8_t *)iocb->cmd_dmabuf->virt;
6331 	pcmd += sizeof(uint32_t);
6332 	rrq = (struct RRQ *)pcmd;
6333 	rrq->rrq_exchg = be32_to_cpu(rrq->rrq_exchg);
6334 	rxid = bf_get(rrq_rxid, rrq);
6335 
6336 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6337 			"2883 Clear RRQ for SID:x%x OXID:x%x RXID:x%x"
6338 			" x%x x%x\n",
6339 			be32_to_cpu(bf_get(rrq_did, rrq)),
6340 			bf_get(rrq_oxid, rrq),
6341 			rxid,
6342 			get_wqe_reqtag(iocb),
6343 			get_job_ulpcontext(phba, iocb));
6344 
6345 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6346 		"Clear RRQ:  did:x%x flg:x%lx exchg:x%.08x",
6347 		ndlp->nlp_DID, ndlp->nlp_flag, rrq->rrq_exchg);
6348 	if (vport->fc_myDID == be32_to_cpu(bf_get(rrq_did, rrq)))
6349 		xri = bf_get(rrq_oxid, rrq);
6350 	else
6351 		xri = rxid;
6352 	prrq = lpfc_get_active_rrq(vport, xri, ndlp->nlp_DID);
6353 	if (prrq)
6354 		lpfc_clr_rrq_active(phba, xri, prrq);
6355 	return;
6356 }
6357 
6358 /**
6359  * lpfc_els_rsp_echo_acc - Issue echo acc response
6360  * @vport: pointer to a virtual N_Port data structure.
6361  * @data: pointer to echo data to return in the accept.
6362  * @oldiocb: pointer to the original lpfc command iocb data structure.
6363  * @ndlp: pointer to a node-list data structure.
6364  *
6365  * Return code
6366  *   0 - Successfully issued acc echo response
6367  *   1 - Failed to issue acc echo response
6368  **/
6369 static int
lpfc_els_rsp_echo_acc(struct lpfc_vport * vport,uint8_t * data,struct lpfc_iocbq * oldiocb,struct lpfc_nodelist * ndlp)6370 lpfc_els_rsp_echo_acc(struct lpfc_vport *vport, uint8_t *data,
6371 		      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6372 {
6373 	struct lpfc_hba  *phba = vport->phba;
6374 	IOCB_t *icmd, *oldcmd;
6375 	union lpfc_wqe128 *wqe;
6376 	struct lpfc_iocbq *elsiocb;
6377 	uint8_t *pcmd;
6378 	uint16_t cmdsize;
6379 	int rc;
6380 	u32 ulp_context;
6381 
6382 	if (phba->sli_rev == LPFC_SLI_REV4)
6383 		cmdsize = oldiocb->wcqe_cmpl.total_data_placed;
6384 	else
6385 		cmdsize = oldiocb->iocb.unsli3.rcvsli3.acc_len;
6386 
6387 	/* The accumulated length can exceed the BPL_SIZE.  For
6388 	 * now, use this as the limit
6389 	 */
6390 	if (cmdsize > LPFC_BPL_SIZE)
6391 		cmdsize = LPFC_BPL_SIZE;
6392 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6393 				     ndlp->nlp_DID, ELS_CMD_ACC);
6394 	if (!elsiocb)
6395 		return 1;
6396 
6397 	if (phba->sli_rev == LPFC_SLI_REV4) {
6398 		wqe = &elsiocb->wqe;
6399 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6400 		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6401 		ulp_context = get_job_ulpcontext(phba, elsiocb);
6402 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6403 		       get_job_rcvoxid(phba, oldiocb));
6404 	} else {
6405 		icmd = &elsiocb->iocb;
6406 		oldcmd = &oldiocb->iocb;
6407 		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6408 		ulp_context = elsiocb->iocb.ulpContext;
6409 		icmd->unsli3.rcvsli3.ox_id =
6410 			oldcmd->unsli3.rcvsli3.ox_id;
6411 	}
6412 
6413 	/* Xmit ECHO ACC response tag <ulpIoTag> */
6414 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6415 			 "2876 Xmit ECHO ACC response tag x%x xri x%x\n",
6416 			 elsiocb->iotag, ulp_context);
6417 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6418 	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6419 	pcmd += sizeof(uint32_t);
6420 	memcpy(pcmd, data, cmdsize - sizeof(uint32_t));
6421 
6422 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6423 		      "Issue ACC ECHO:  did:x%x flg:x%lx refcnt %d",
6424 		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6425 
6426 	phba->fc_stat.elsXmitACC++;
6427 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6428 	elsiocb->ndlp =  lpfc_nlp_get(ndlp);
6429 	if (!elsiocb->ndlp) {
6430 		lpfc_els_free_iocb(phba, elsiocb);
6431 		return 1;
6432 	}
6433 
6434 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6435 	if (rc == IOCB_ERROR) {
6436 		lpfc_els_free_iocb(phba, elsiocb);
6437 		lpfc_nlp_put(ndlp);
6438 		return 1;
6439 	}
6440 
6441 	return 0;
6442 }
6443 
6444 /**
6445  * lpfc_els_disc_adisc - Issue remaining adisc iocbs to npr nodes of a vport
6446  * @vport: pointer to a host virtual N_Port data structure.
6447  *
6448  * This routine issues Address Discover (ADISC) ELS commands to those
6449  * N_Ports which are in node port recovery state and ADISC has not been issued
6450  * for the @vport. Each time an ELS ADISC IOCB is issued by invoking the
6451  * lpfc_issue_els_adisc() routine, the per @vport number of discover count
6452  * (num_disc_nodes) shall be incremented. If the num_disc_nodes reaches a
6453  * pre-configured threshold (cfg_discovery_threads), the @vport fc_flag will
6454  * be marked with FC_NLP_MORE bit and the process of issuing remaining ADISC
6455  * IOCBs quit for later pick up. On the other hand, after walking through
6456  * all the ndlps with the @vport and there is none ADISC IOCB issued, the
6457  * @vport fc_flag shall be cleared with FC_NLP_MORE bit indicating there is
6458  * no more ADISC need to be sent.
6459  *
6460  * Return code
6461  *    The number of N_Ports with adisc issued.
6462  **/
6463 int
lpfc_els_disc_adisc(struct lpfc_vport * vport)6464 lpfc_els_disc_adisc(struct lpfc_vport *vport)
6465 {
6466 	struct lpfc_nodelist *ndlp, *next_ndlp;
6467 	int sentadisc = 0;
6468 
6469 	/* go thru NPR nodes and issue any remaining ELS ADISCs */
6470 	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6471 
6472 		if (ndlp->nlp_state != NLP_STE_NPR_NODE ||
6473 		    !test_bit(NLP_NPR_ADISC, &ndlp->nlp_flag))
6474 			continue;
6475 
6476 		clear_bit(NLP_NPR_ADISC, &ndlp->nlp_flag);
6477 
6478 		if (!test_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag)) {
6479 			/* This node was marked for ADISC but was not picked
6480 			 * for discovery. This is possible if the node was
6481 			 * missing in gidft response.
6482 			 *
6483 			 * At time of marking node for ADISC, we skipped unreg
6484 			 * from backend
6485 			 */
6486 			lpfc_nlp_unreg_node(vport, ndlp);
6487 			lpfc_unreg_rpi(vport, ndlp);
6488 			continue;
6489 		}
6490 
6491 		ndlp->nlp_prev_state = ndlp->nlp_state;
6492 		lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
6493 		lpfc_issue_els_adisc(vport, ndlp, 0);
6494 		sentadisc++;
6495 		vport->num_disc_nodes++;
6496 		if (vport->num_disc_nodes >=
6497 				vport->cfg_discovery_threads) {
6498 			set_bit(FC_NLP_MORE, &vport->fc_flag);
6499 			break;
6500 		}
6501 
6502 	}
6503 	if (sentadisc == 0)
6504 		clear_bit(FC_NLP_MORE, &vport->fc_flag);
6505 	return sentadisc;
6506 }
6507 
6508 /**
6509  * lpfc_els_disc_plogi - Issue plogi for all npr nodes of a vport before adisc
6510  * @vport: pointer to a host virtual N_Port data structure.
6511  *
6512  * This routine issues Port Login (PLOGI) ELS commands to all the N_Ports
6513  * which are in node port recovery state, with a @vport. Each time an ELS
6514  * ADISC PLOGI IOCB is issued by invoking the lpfc_issue_els_plogi() routine,
6515  * the per @vport number of discover count (num_disc_nodes) shall be
6516  * incremented. If the num_disc_nodes reaches a pre-configured threshold
6517  * (cfg_discovery_threads), the @vport fc_flag will be marked with FC_NLP_MORE
6518  * bit set and quit the process of issuing remaining ADISC PLOGIN IOCBs for
6519  * later pick up. On the other hand, after walking through all the ndlps with
6520  * the @vport and there is none ADISC PLOGI IOCB issued, the @vport fc_flag
6521  * shall be cleared with the FC_NLP_MORE bit indicating there is no more ADISC
6522  * PLOGI need to be sent.
6523  *
6524  * Return code
6525  *   The number of N_Ports with plogi issued.
6526  **/
6527 int
lpfc_els_disc_plogi(struct lpfc_vport * vport)6528 lpfc_els_disc_plogi(struct lpfc_vport *vport)
6529 {
6530 	struct lpfc_nodelist *ndlp, *next_ndlp;
6531 	int sentplogi = 0;
6532 
6533 	/* go thru NPR nodes and issue any remaining ELS PLOGIs */
6534 	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6535 		if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
6536 		    test_bit(NLP_NPR_2B_DISC, &ndlp->nlp_flag) &&
6537 		    !test_bit(NLP_DELAY_TMO, &ndlp->nlp_flag) &&
6538 		    !test_bit(NLP_NPR_ADISC, &ndlp->nlp_flag)) {
6539 			ndlp->nlp_prev_state = ndlp->nlp_state;
6540 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
6541 			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
6542 			sentplogi++;
6543 			vport->num_disc_nodes++;
6544 			if (vport->num_disc_nodes >=
6545 					vport->cfg_discovery_threads) {
6546 				set_bit(FC_NLP_MORE, &vport->fc_flag);
6547 				break;
6548 			}
6549 		}
6550 	}
6551 
6552 	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6553 			 "6452 Discover PLOGI %d flag x%lx\n",
6554 			 sentplogi, vport->fc_flag);
6555 
6556 	if (sentplogi)
6557 		lpfc_set_disctmo(vport);
6558 	else
6559 		clear_bit(FC_NLP_MORE, &vport->fc_flag);
6560 	return sentplogi;
6561 }
6562 
6563 static uint32_t
lpfc_rdp_res_link_service(struct fc_rdp_link_service_desc * desc,uint32_t word0)6564 lpfc_rdp_res_link_service(struct fc_rdp_link_service_desc *desc,
6565 		uint32_t word0)
6566 {
6567 
6568 	desc->tag = cpu_to_be32(RDP_LINK_SERVICE_DESC_TAG);
6569 	desc->payload.els_req = word0;
6570 	desc->length = cpu_to_be32(sizeof(desc->payload));
6571 
6572 	return sizeof(struct fc_rdp_link_service_desc);
6573 }
6574 
6575 static uint32_t
lpfc_rdp_res_sfp_desc(struct fc_rdp_sfp_desc * desc,uint8_t * page_a0,uint8_t * page_a2)6576 lpfc_rdp_res_sfp_desc(struct fc_rdp_sfp_desc *desc,
6577 		uint8_t *page_a0, uint8_t *page_a2)
6578 {
6579 	uint16_t wavelength;
6580 	uint16_t temperature;
6581 	uint16_t rx_power;
6582 	uint16_t tx_bias;
6583 	uint16_t tx_power;
6584 	uint16_t vcc;
6585 	uint16_t flag = 0;
6586 	struct sff_trasnceiver_codes_byte4 *trasn_code_byte4;
6587 	struct sff_trasnceiver_codes_byte5 *trasn_code_byte5;
6588 
6589 	desc->tag = cpu_to_be32(RDP_SFP_DESC_TAG);
6590 
6591 	trasn_code_byte4 = (struct sff_trasnceiver_codes_byte4 *)
6592 			&page_a0[SSF_TRANSCEIVER_CODE_B4];
6593 	trasn_code_byte5 = (struct sff_trasnceiver_codes_byte5 *)
6594 			&page_a0[SSF_TRANSCEIVER_CODE_B5];
6595 
6596 	if ((trasn_code_byte4->fc_sw_laser) ||
6597 	    (trasn_code_byte5->fc_sw_laser_sl) ||
6598 	    (trasn_code_byte5->fc_sw_laser_sn)) {  /* check if its short WL */
6599 		flag |= (SFP_FLAG_PT_SWLASER << SFP_FLAG_PT_SHIFT);
6600 	} else if (trasn_code_byte4->fc_lw_laser) {
6601 		wavelength = (page_a0[SSF_WAVELENGTH_B1] << 8) |
6602 			page_a0[SSF_WAVELENGTH_B0];
6603 		if (wavelength == SFP_WAVELENGTH_LC1310)
6604 			flag |= SFP_FLAG_PT_LWLASER_LC1310 << SFP_FLAG_PT_SHIFT;
6605 		if (wavelength == SFP_WAVELENGTH_LL1550)
6606 			flag |= SFP_FLAG_PT_LWLASER_LL1550 << SFP_FLAG_PT_SHIFT;
6607 	}
6608 	/* check if its SFP+ */
6609 	flag |= ((page_a0[SSF_IDENTIFIER] == SFF_PG0_IDENT_SFP) ?
6610 			SFP_FLAG_CT_SFP_PLUS : SFP_FLAG_CT_UNKNOWN)
6611 					<< SFP_FLAG_CT_SHIFT;
6612 
6613 	/* check if its OPTICAL */
6614 	flag |= ((page_a0[SSF_CONNECTOR] == SFF_PG0_CONNECTOR_LC) ?
6615 			SFP_FLAG_IS_OPTICAL_PORT : 0)
6616 					<< SFP_FLAG_IS_OPTICAL_SHIFT;
6617 
6618 	temperature = (page_a2[SFF_TEMPERATURE_B1] << 8 |
6619 		page_a2[SFF_TEMPERATURE_B0]);
6620 	vcc = (page_a2[SFF_VCC_B1] << 8 |
6621 		page_a2[SFF_VCC_B0]);
6622 	tx_power = (page_a2[SFF_TXPOWER_B1] << 8 |
6623 		page_a2[SFF_TXPOWER_B0]);
6624 	tx_bias = (page_a2[SFF_TX_BIAS_CURRENT_B1] << 8 |
6625 		page_a2[SFF_TX_BIAS_CURRENT_B0]);
6626 	rx_power = (page_a2[SFF_RXPOWER_B1] << 8 |
6627 		page_a2[SFF_RXPOWER_B0]);
6628 	desc->sfp_info.temperature = cpu_to_be16(temperature);
6629 	desc->sfp_info.rx_power = cpu_to_be16(rx_power);
6630 	desc->sfp_info.tx_bias = cpu_to_be16(tx_bias);
6631 	desc->sfp_info.tx_power = cpu_to_be16(tx_power);
6632 	desc->sfp_info.vcc = cpu_to_be16(vcc);
6633 
6634 	desc->sfp_info.flags = cpu_to_be16(flag);
6635 	desc->length = cpu_to_be32(sizeof(desc->sfp_info));
6636 
6637 	return sizeof(struct fc_rdp_sfp_desc);
6638 }
6639 
6640 static uint32_t
lpfc_rdp_res_link_error(struct fc_rdp_link_error_status_desc * desc,READ_LNK_VAR * stat)6641 lpfc_rdp_res_link_error(struct fc_rdp_link_error_status_desc *desc,
6642 		READ_LNK_VAR *stat)
6643 {
6644 	uint32_t type;
6645 
6646 	desc->tag = cpu_to_be32(RDP_LINK_ERROR_STATUS_DESC_TAG);
6647 
6648 	type = VN_PT_PHY_PF_PORT << VN_PT_PHY_SHIFT;
6649 
6650 	desc->info.port_type = cpu_to_be32(type);
6651 
6652 	desc->info.link_status.link_failure_cnt =
6653 		cpu_to_be32(stat->linkFailureCnt);
6654 	desc->info.link_status.loss_of_synch_cnt =
6655 		cpu_to_be32(stat->lossSyncCnt);
6656 	desc->info.link_status.loss_of_signal_cnt =
6657 		cpu_to_be32(stat->lossSignalCnt);
6658 	desc->info.link_status.primitive_seq_proto_err =
6659 		cpu_to_be32(stat->primSeqErrCnt);
6660 	desc->info.link_status.invalid_trans_word =
6661 		cpu_to_be32(stat->invalidXmitWord);
6662 	desc->info.link_status.invalid_crc_cnt = cpu_to_be32(stat->crcCnt);
6663 
6664 	desc->length = cpu_to_be32(sizeof(desc->info));
6665 
6666 	return sizeof(struct fc_rdp_link_error_status_desc);
6667 }
6668 
6669 static uint32_t
lpfc_rdp_res_bbc_desc(struct fc_rdp_bbc_desc * desc,READ_LNK_VAR * stat,struct lpfc_vport * vport)6670 lpfc_rdp_res_bbc_desc(struct fc_rdp_bbc_desc *desc, READ_LNK_VAR *stat,
6671 		      struct lpfc_vport *vport)
6672 {
6673 	uint32_t bbCredit;
6674 
6675 	desc->tag = cpu_to_be32(RDP_BBC_DESC_TAG);
6676 
6677 	bbCredit = vport->fc_sparam.cmn.bbCreditLsb |
6678 			(vport->fc_sparam.cmn.bbCreditMsb << 8);
6679 	desc->bbc_info.port_bbc = cpu_to_be32(bbCredit);
6680 	if (vport->phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
6681 		bbCredit = vport->phba->fc_fabparam.cmn.bbCreditLsb |
6682 			(vport->phba->fc_fabparam.cmn.bbCreditMsb << 8);
6683 		desc->bbc_info.attached_port_bbc = cpu_to_be32(bbCredit);
6684 	} else {
6685 		desc->bbc_info.attached_port_bbc = 0;
6686 	}
6687 
6688 	desc->bbc_info.rtt = 0;
6689 	desc->length = cpu_to_be32(sizeof(desc->bbc_info));
6690 
6691 	return sizeof(struct fc_rdp_bbc_desc);
6692 }
6693 
6694 static uint32_t
lpfc_rdp_res_oed_temp_desc(struct lpfc_hba * phba,struct fc_rdp_oed_sfp_desc * desc,uint8_t * page_a2)6695 lpfc_rdp_res_oed_temp_desc(struct lpfc_hba *phba,
6696 			   struct fc_rdp_oed_sfp_desc *desc, uint8_t *page_a2)
6697 {
6698 	uint32_t flags = 0;
6699 
6700 	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6701 
6702 	desc->oed_info.hi_alarm = page_a2[SSF_TEMP_HIGH_ALARM];
6703 	desc->oed_info.lo_alarm = page_a2[SSF_TEMP_LOW_ALARM];
6704 	desc->oed_info.hi_warning = page_a2[SSF_TEMP_HIGH_WARNING];
6705 	desc->oed_info.lo_warning = page_a2[SSF_TEMP_LOW_WARNING];
6706 
6707 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6708 		flags |= RDP_OET_HIGH_ALARM;
6709 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6710 		flags |= RDP_OET_LOW_ALARM;
6711 	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6712 		flags |= RDP_OET_HIGH_WARNING;
6713 	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6714 		flags |= RDP_OET_LOW_WARNING;
6715 
6716 	flags |= ((0xf & RDP_OED_TEMPERATURE) << RDP_OED_TYPE_SHIFT);
6717 	desc->oed_info.function_flags = cpu_to_be32(flags);
6718 	desc->length = cpu_to_be32(sizeof(desc->oed_info));
6719 	return sizeof(struct fc_rdp_oed_sfp_desc);
6720 }
6721 
6722 static uint32_t
lpfc_rdp_res_oed_voltage_desc(struct lpfc_hba * phba,struct fc_rdp_oed_sfp_desc * desc,uint8_t * page_a2)6723 lpfc_rdp_res_oed_voltage_desc(struct lpfc_hba *phba,
6724 			      struct fc_rdp_oed_sfp_desc *desc,
6725 			      uint8_t *page_a2)
6726 {
6727 	uint32_t flags = 0;
6728 
6729 	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6730 
6731 	desc->oed_info.hi_alarm = page_a2[SSF_VOLTAGE_HIGH_ALARM];
6732 	desc->oed_info.lo_alarm = page_a2[SSF_VOLTAGE_LOW_ALARM];
6733 	desc->oed_info.hi_warning = page_a2[SSF_VOLTAGE_HIGH_WARNING];
6734 	desc->oed_info.lo_warning = page_a2[SSF_VOLTAGE_LOW_WARNING];
6735 
6736 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6737 		flags |= RDP_OET_HIGH_ALARM;
6738 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6739 		flags |= RDP_OET_LOW_ALARM;
6740 	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6741 		flags |= RDP_OET_HIGH_WARNING;
6742 	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6743 		flags |= RDP_OET_LOW_WARNING;
6744 
6745 	flags |= ((0xf & RDP_OED_VOLTAGE) << RDP_OED_TYPE_SHIFT);
6746 	desc->oed_info.function_flags = cpu_to_be32(flags);
6747 	desc->length = cpu_to_be32(sizeof(desc->oed_info));
6748 	return sizeof(struct fc_rdp_oed_sfp_desc);
6749 }
6750 
6751 static uint32_t
lpfc_rdp_res_oed_txbias_desc(struct lpfc_hba * phba,struct fc_rdp_oed_sfp_desc * desc,uint8_t * page_a2)6752 lpfc_rdp_res_oed_txbias_desc(struct lpfc_hba *phba,
6753 			     struct fc_rdp_oed_sfp_desc *desc,
6754 			     uint8_t *page_a2)
6755 {
6756 	uint32_t flags = 0;
6757 
6758 	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6759 
6760 	desc->oed_info.hi_alarm = page_a2[SSF_BIAS_HIGH_ALARM];
6761 	desc->oed_info.lo_alarm = page_a2[SSF_BIAS_LOW_ALARM];
6762 	desc->oed_info.hi_warning = page_a2[SSF_BIAS_HIGH_WARNING];
6763 	desc->oed_info.lo_warning = page_a2[SSF_BIAS_LOW_WARNING];
6764 
6765 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6766 		flags |= RDP_OET_HIGH_ALARM;
6767 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXBIAS)
6768 		flags |= RDP_OET_LOW_ALARM;
6769 	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6770 		flags |= RDP_OET_HIGH_WARNING;
6771 	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXBIAS)
6772 		flags |= RDP_OET_LOW_WARNING;
6773 
6774 	flags |= ((0xf & RDP_OED_TXBIAS) << RDP_OED_TYPE_SHIFT);
6775 	desc->oed_info.function_flags = cpu_to_be32(flags);
6776 	desc->length = cpu_to_be32(sizeof(desc->oed_info));
6777 	return sizeof(struct fc_rdp_oed_sfp_desc);
6778 }
6779 
6780 static uint32_t
lpfc_rdp_res_oed_txpower_desc(struct lpfc_hba * phba,struct fc_rdp_oed_sfp_desc * desc,uint8_t * page_a2)6781 lpfc_rdp_res_oed_txpower_desc(struct lpfc_hba *phba,
6782 			      struct fc_rdp_oed_sfp_desc *desc,
6783 			      uint8_t *page_a2)
6784 {
6785 	uint32_t flags = 0;
6786 
6787 	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6788 
6789 	desc->oed_info.hi_alarm = page_a2[SSF_TXPOWER_HIGH_ALARM];
6790 	desc->oed_info.lo_alarm = page_a2[SSF_TXPOWER_LOW_ALARM];
6791 	desc->oed_info.hi_warning = page_a2[SSF_TXPOWER_HIGH_WARNING];
6792 	desc->oed_info.lo_warning = page_a2[SSF_TXPOWER_LOW_WARNING];
6793 
6794 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6795 		flags |= RDP_OET_HIGH_ALARM;
6796 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXPOWER)
6797 		flags |= RDP_OET_LOW_ALARM;
6798 	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6799 		flags |= RDP_OET_HIGH_WARNING;
6800 	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXPOWER)
6801 		flags |= RDP_OET_LOW_WARNING;
6802 
6803 	flags |= ((0xf & RDP_OED_TXPOWER) << RDP_OED_TYPE_SHIFT);
6804 	desc->oed_info.function_flags = cpu_to_be32(flags);
6805 	desc->length = cpu_to_be32(sizeof(desc->oed_info));
6806 	return sizeof(struct fc_rdp_oed_sfp_desc);
6807 }
6808 
6809 
6810 static uint32_t
lpfc_rdp_res_oed_rxpower_desc(struct lpfc_hba * phba,struct fc_rdp_oed_sfp_desc * desc,uint8_t * page_a2)6811 lpfc_rdp_res_oed_rxpower_desc(struct lpfc_hba *phba,
6812 			      struct fc_rdp_oed_sfp_desc *desc,
6813 			      uint8_t *page_a2)
6814 {
6815 	uint32_t flags = 0;
6816 
6817 	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6818 
6819 	desc->oed_info.hi_alarm = page_a2[SSF_RXPOWER_HIGH_ALARM];
6820 	desc->oed_info.lo_alarm = page_a2[SSF_RXPOWER_LOW_ALARM];
6821 	desc->oed_info.hi_warning = page_a2[SSF_RXPOWER_HIGH_WARNING];
6822 	desc->oed_info.lo_warning = page_a2[SSF_RXPOWER_LOW_WARNING];
6823 
6824 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6825 		flags |= RDP_OET_HIGH_ALARM;
6826 	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_RXPOWER)
6827 		flags |= RDP_OET_LOW_ALARM;
6828 	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6829 		flags |= RDP_OET_HIGH_WARNING;
6830 	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_RXPOWER)
6831 		flags |= RDP_OET_LOW_WARNING;
6832 
6833 	flags |= ((0xf & RDP_OED_RXPOWER) << RDP_OED_TYPE_SHIFT);
6834 	desc->oed_info.function_flags = cpu_to_be32(flags);
6835 	desc->length = cpu_to_be32(sizeof(desc->oed_info));
6836 	return sizeof(struct fc_rdp_oed_sfp_desc);
6837 }
6838 
6839 static uint32_t
lpfc_rdp_res_opd_desc(struct fc_rdp_opd_sfp_desc * desc,uint8_t * page_a0,struct lpfc_vport * vport)6840 lpfc_rdp_res_opd_desc(struct fc_rdp_opd_sfp_desc *desc,
6841 		      uint8_t *page_a0, struct lpfc_vport *vport)
6842 {
6843 	desc->tag = cpu_to_be32(RDP_OPD_DESC_TAG);
6844 	memcpy(desc->opd_info.vendor_name, &page_a0[SSF_VENDOR_NAME], 16);
6845 	memcpy(desc->opd_info.model_number, &page_a0[SSF_VENDOR_PN], 16);
6846 	memcpy(desc->opd_info.serial_number, &page_a0[SSF_VENDOR_SN], 16);
6847 	memcpy(desc->opd_info.revision, &page_a0[SSF_VENDOR_REV], 4);
6848 	memcpy(desc->opd_info.date, &page_a0[SSF_DATE_CODE], 8);
6849 	desc->length = cpu_to_be32(sizeof(desc->opd_info));
6850 	return sizeof(struct fc_rdp_opd_sfp_desc);
6851 }
6852 
6853 static uint32_t
lpfc_rdp_res_fec_desc(struct fc_fec_rdp_desc * desc,READ_LNK_VAR * stat)6854 lpfc_rdp_res_fec_desc(struct fc_fec_rdp_desc *desc, READ_LNK_VAR *stat)
6855 {
6856 	if (bf_get(lpfc_read_link_stat_gec2, stat) == 0)
6857 		return 0;
6858 	desc->tag = cpu_to_be32(RDP_FEC_DESC_TAG);
6859 
6860 	desc->info.CorrectedBlocks =
6861 		cpu_to_be32(stat->fecCorrBlkCount);
6862 	desc->info.UncorrectableBlocks =
6863 		cpu_to_be32(stat->fecUncorrBlkCount);
6864 
6865 	desc->length = cpu_to_be32(sizeof(desc->info));
6866 
6867 	return sizeof(struct fc_fec_rdp_desc);
6868 }
6869 
6870 static uint32_t
lpfc_rdp_res_speed(struct fc_rdp_port_speed_desc * desc,struct lpfc_hba * phba)6871 lpfc_rdp_res_speed(struct fc_rdp_port_speed_desc *desc, struct lpfc_hba *phba)
6872 {
6873 	uint16_t rdp_cap = 0;
6874 	uint16_t rdp_speed;
6875 
6876 	desc->tag = cpu_to_be32(RDP_PORT_SPEED_DESC_TAG);
6877 
6878 	switch (phba->fc_linkspeed) {
6879 	case LPFC_LINK_SPEED_1GHZ:
6880 		rdp_speed = RDP_PS_1GB;
6881 		break;
6882 	case LPFC_LINK_SPEED_2GHZ:
6883 		rdp_speed = RDP_PS_2GB;
6884 		break;
6885 	case LPFC_LINK_SPEED_4GHZ:
6886 		rdp_speed = RDP_PS_4GB;
6887 		break;
6888 	case LPFC_LINK_SPEED_8GHZ:
6889 		rdp_speed = RDP_PS_8GB;
6890 		break;
6891 	case LPFC_LINK_SPEED_10GHZ:
6892 		rdp_speed = RDP_PS_10GB;
6893 		break;
6894 	case LPFC_LINK_SPEED_16GHZ:
6895 		rdp_speed = RDP_PS_16GB;
6896 		break;
6897 	case LPFC_LINK_SPEED_32GHZ:
6898 		rdp_speed = RDP_PS_32GB;
6899 		break;
6900 	case LPFC_LINK_SPEED_64GHZ:
6901 		rdp_speed = RDP_PS_64GB;
6902 		break;
6903 	case LPFC_LINK_SPEED_128GHZ:
6904 		rdp_speed = RDP_PS_128GB;
6905 		break;
6906 	case LPFC_LINK_SPEED_256GHZ:
6907 		rdp_speed = RDP_PS_256GB;
6908 		break;
6909 	default:
6910 		rdp_speed = RDP_PS_UNKNOWN;
6911 		break;
6912 	}
6913 
6914 	desc->info.port_speed.speed = cpu_to_be16(rdp_speed);
6915 
6916 	if (phba->lmt & LMT_256Gb)
6917 		rdp_cap |= RDP_PS_256GB;
6918 	if (phba->lmt & LMT_128Gb)
6919 		rdp_cap |= RDP_PS_128GB;
6920 	if (phba->lmt & LMT_64Gb)
6921 		rdp_cap |= RDP_PS_64GB;
6922 	if (phba->lmt & LMT_32Gb)
6923 		rdp_cap |= RDP_PS_32GB;
6924 	if (phba->lmt & LMT_16Gb)
6925 		rdp_cap |= RDP_PS_16GB;
6926 	if (phba->lmt & LMT_10Gb)
6927 		rdp_cap |= RDP_PS_10GB;
6928 	if (phba->lmt & LMT_8Gb)
6929 		rdp_cap |= RDP_PS_8GB;
6930 	if (phba->lmt & LMT_4Gb)
6931 		rdp_cap |= RDP_PS_4GB;
6932 	if (phba->lmt & LMT_2Gb)
6933 		rdp_cap |= RDP_PS_2GB;
6934 	if (phba->lmt & LMT_1Gb)
6935 		rdp_cap |= RDP_PS_1GB;
6936 
6937 	if (rdp_cap == 0)
6938 		rdp_cap = RDP_CAP_UNKNOWN;
6939 	if (phba->cfg_link_speed != LPFC_USER_LINK_SPEED_AUTO)
6940 		rdp_cap |= RDP_CAP_USER_CONFIGURED;
6941 
6942 	desc->info.port_speed.capabilities = cpu_to_be16(rdp_cap);
6943 	desc->length = cpu_to_be32(sizeof(desc->info));
6944 	return sizeof(struct fc_rdp_port_speed_desc);
6945 }
6946 
6947 static uint32_t
lpfc_rdp_res_diag_port_names(struct fc_rdp_port_name_desc * desc,struct lpfc_vport * vport)6948 lpfc_rdp_res_diag_port_names(struct fc_rdp_port_name_desc *desc,
6949 		struct lpfc_vport *vport)
6950 {
6951 
6952 	desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
6953 
6954 	memcpy(desc->port_names.wwnn, &vport->fc_nodename,
6955 			sizeof(desc->port_names.wwnn));
6956 
6957 	memcpy(desc->port_names.wwpn, &vport->fc_portname,
6958 			sizeof(desc->port_names.wwpn));
6959 
6960 	desc->length = cpu_to_be32(sizeof(desc->port_names));
6961 	return sizeof(struct fc_rdp_port_name_desc);
6962 }
6963 
6964 static uint32_t
lpfc_rdp_res_attach_port_names(struct fc_rdp_port_name_desc * desc,struct lpfc_vport * vport,struct lpfc_nodelist * ndlp)6965 lpfc_rdp_res_attach_port_names(struct fc_rdp_port_name_desc *desc,
6966 		struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
6967 {
6968 
6969 	desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
6970 	if (test_bit(FC_FABRIC, &vport->fc_flag)) {
6971 		memcpy(desc->port_names.wwnn, &vport->fabric_nodename,
6972 		       sizeof(desc->port_names.wwnn));
6973 
6974 		memcpy(desc->port_names.wwpn, &vport->fabric_portname,
6975 		       sizeof(desc->port_names.wwpn));
6976 	} else {  /* Point to Point */
6977 		memcpy(desc->port_names.wwnn, &ndlp->nlp_nodename,
6978 		       sizeof(desc->port_names.wwnn));
6979 
6980 		memcpy(desc->port_names.wwpn, &ndlp->nlp_portname,
6981 		       sizeof(desc->port_names.wwpn));
6982 	}
6983 
6984 	desc->length = cpu_to_be32(sizeof(desc->port_names));
6985 	return sizeof(struct fc_rdp_port_name_desc);
6986 }
6987 
6988 static void
lpfc_els_rdp_cmpl(struct lpfc_hba * phba,struct lpfc_rdp_context * rdp_context,int status)6989 lpfc_els_rdp_cmpl(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context,
6990 		int status)
6991 {
6992 	struct lpfc_nodelist *ndlp = rdp_context->ndlp;
6993 	struct lpfc_vport *vport = ndlp->vport;
6994 	struct lpfc_iocbq *elsiocb;
6995 	struct ulp_bde64 *bpl;
6996 	IOCB_t *icmd;
6997 	union lpfc_wqe128 *wqe;
6998 	uint8_t *pcmd;
6999 	struct ls_rjt *stat;
7000 	struct fc_rdp_res_frame *rdp_res;
7001 	uint32_t cmdsize, len;
7002 	uint16_t *flag_ptr;
7003 	int rc;
7004 	u32 ulp_context;
7005 
7006 	if (status != SUCCESS)
7007 		goto error;
7008 
7009 	/* This will change once we know the true size of the RDP payload */
7010 	cmdsize = sizeof(struct fc_rdp_res_frame);
7011 
7012 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize,
7013 				lpfc_max_els_tries, rdp_context->ndlp,
7014 				rdp_context->ndlp->nlp_DID, ELS_CMD_ACC);
7015 	if (!elsiocb)
7016 		goto free_rdp_context;
7017 
7018 	ulp_context = get_job_ulpcontext(phba, elsiocb);
7019 	if (phba->sli_rev == LPFC_SLI_REV4) {
7020 		wqe = &elsiocb->wqe;
7021 		/* ox-id of the frame */
7022 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7023 		       rdp_context->ox_id);
7024 		bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
7025 		       rdp_context->rx_id);
7026 	} else {
7027 		icmd = &elsiocb->iocb;
7028 		icmd->ulpContext = rdp_context->rx_id;
7029 		icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
7030 	}
7031 
7032 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7033 			"2171 Xmit RDP response tag x%x xri x%x, "
7034 			"did x%x, nlp_flag x%lx, nlp_state x%x, rpi x%x",
7035 			elsiocb->iotag, ulp_context,
7036 			ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
7037 			ndlp->nlp_rpi);
7038 	rdp_res = (struct fc_rdp_res_frame *)elsiocb->cmd_dmabuf->virt;
7039 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7040 	memset(pcmd, 0, sizeof(struct fc_rdp_res_frame));
7041 	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
7042 
7043 	/* Update Alarm and Warning */
7044 	flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_ALARM_FLAGS);
7045 	phba->sfp_alarm |= *flag_ptr;
7046 	flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_WARNING_FLAGS);
7047 	phba->sfp_warning |= *flag_ptr;
7048 
7049 	/* For RDP payload */
7050 	len = 8;
7051 	len += lpfc_rdp_res_link_service((struct fc_rdp_link_service_desc *)
7052 					 (len + pcmd), ELS_CMD_RDP);
7053 
7054 	len += lpfc_rdp_res_sfp_desc((struct fc_rdp_sfp_desc *)(len + pcmd),
7055 			rdp_context->page_a0, rdp_context->page_a2);
7056 	len += lpfc_rdp_res_speed((struct fc_rdp_port_speed_desc *)(len + pcmd),
7057 				  phba);
7058 	len += lpfc_rdp_res_link_error((struct fc_rdp_link_error_status_desc *)
7059 				       (len + pcmd), &rdp_context->link_stat);
7060 	len += lpfc_rdp_res_diag_port_names((struct fc_rdp_port_name_desc *)
7061 					     (len + pcmd), vport);
7062 	len += lpfc_rdp_res_attach_port_names((struct fc_rdp_port_name_desc *)
7063 					(len + pcmd), vport, ndlp);
7064 	len += lpfc_rdp_res_fec_desc((struct fc_fec_rdp_desc *)(len + pcmd),
7065 			&rdp_context->link_stat);
7066 	len += lpfc_rdp_res_bbc_desc((struct fc_rdp_bbc_desc *)(len + pcmd),
7067 				     &rdp_context->link_stat, vport);
7068 	len += lpfc_rdp_res_oed_temp_desc(phba,
7069 				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7070 				rdp_context->page_a2);
7071 	len += lpfc_rdp_res_oed_voltage_desc(phba,
7072 				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7073 				rdp_context->page_a2);
7074 	len += lpfc_rdp_res_oed_txbias_desc(phba,
7075 				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7076 				rdp_context->page_a2);
7077 	len += lpfc_rdp_res_oed_txpower_desc(phba,
7078 				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7079 				rdp_context->page_a2);
7080 	len += lpfc_rdp_res_oed_rxpower_desc(phba,
7081 				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7082 				rdp_context->page_a2);
7083 	len += lpfc_rdp_res_opd_desc((struct fc_rdp_opd_sfp_desc *)(len + pcmd),
7084 				     rdp_context->page_a0, vport);
7085 
7086 	rdp_res->length = cpu_to_be32(len - 8);
7087 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7088 
7089 	/* Now that we know the true size of the payload, update the BPL */
7090 	bpl = (struct ulp_bde64 *)elsiocb->bpl_dmabuf->virt;
7091 	bpl->tus.f.bdeSize = len;
7092 	bpl->tus.f.bdeFlags = 0;
7093 	bpl->tus.w = le32_to_cpu(bpl->tus.w);
7094 
7095 	phba->fc_stat.elsXmitACC++;
7096 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
7097 	if (!elsiocb->ndlp) {
7098 		lpfc_els_free_iocb(phba, elsiocb);
7099 		goto free_rdp_context;
7100 	}
7101 
7102 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7103 	if (rc == IOCB_ERROR) {
7104 		lpfc_els_free_iocb(phba, elsiocb);
7105 		lpfc_nlp_put(ndlp);
7106 	}
7107 
7108 	goto free_rdp_context;
7109 
7110 error:
7111 	cmdsize = 2 * sizeof(uint32_t);
7112 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, lpfc_max_els_tries,
7113 			ndlp, ndlp->nlp_DID, ELS_CMD_LS_RJT);
7114 	if (!elsiocb)
7115 		goto free_rdp_context;
7116 
7117 	if (phba->sli_rev == LPFC_SLI_REV4) {
7118 		wqe = &elsiocb->wqe;
7119 		/* ox-id of the frame */
7120 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7121 		       rdp_context->ox_id);
7122 		bf_set(wqe_ctxt_tag,
7123 		       &wqe->xmit_els_rsp.wqe_com,
7124 		       rdp_context->rx_id);
7125 	} else {
7126 		icmd = &elsiocb->iocb;
7127 		icmd->ulpContext = rdp_context->rx_id;
7128 		icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
7129 	}
7130 
7131 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7132 
7133 	*((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
7134 	stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7135 	stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7136 
7137 	phba->fc_stat.elsXmitLSRJT++;
7138 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7139 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
7140 	if (!elsiocb->ndlp) {
7141 		lpfc_els_free_iocb(phba, elsiocb);
7142 		goto free_rdp_context;
7143 	}
7144 
7145 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7146 	if (rc == IOCB_ERROR) {
7147 		lpfc_els_free_iocb(phba, elsiocb);
7148 		lpfc_nlp_put(ndlp);
7149 	}
7150 
7151 free_rdp_context:
7152 	/* This reference put is for the original unsolicited RDP. If the
7153 	 * prep failed, there is no reference to remove.
7154 	 */
7155 	lpfc_nlp_put(ndlp);
7156 	kfree(rdp_context);
7157 }
7158 
7159 static int
lpfc_get_rdp_info(struct lpfc_hba * phba,struct lpfc_rdp_context * rdp_context)7160 lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context)
7161 {
7162 	LPFC_MBOXQ_t *mbox = NULL;
7163 	int rc;
7164 
7165 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7166 	if (!mbox) {
7167 		lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
7168 				"7105 failed to allocate mailbox memory");
7169 		return 1;
7170 	}
7171 
7172 	if (lpfc_sli4_dump_page_a0(phba, mbox))
7173 		goto rdp_fail;
7174 	mbox->vport = rdp_context->ndlp->vport;
7175 	mbox->mbox_cmpl = lpfc_mbx_cmpl_rdp_page_a0;
7176 	mbox->ctx_u.rdp = rdp_context;
7177 	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7178 	if (rc == MBX_NOT_FINISHED) {
7179 		lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
7180 		return 1;
7181 	}
7182 
7183 	return 0;
7184 
7185 rdp_fail:
7186 	mempool_free(mbox, phba->mbox_mem_pool);
7187 	return 1;
7188 }
7189 
lpfc_get_sfp_info_wait(struct lpfc_hba * phba,struct lpfc_rdp_context * rdp_context)7190 int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
7191 			   struct lpfc_rdp_context *rdp_context)
7192 {
7193 	LPFC_MBOXQ_t *mbox = NULL;
7194 	int rc;
7195 	struct lpfc_dmabuf *mp;
7196 	struct lpfc_dmabuf *mpsave;
7197 	void *virt;
7198 	MAILBOX_t *mb;
7199 
7200 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7201 	if (!mbox) {
7202 		lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
7203 				"7205 failed to allocate mailbox memory");
7204 		return 1;
7205 	}
7206 
7207 	if (lpfc_sli4_dump_page_a0(phba, mbox))
7208 		goto sfp_fail;
7209 	mp = mbox->ctx_buf;
7210 	mpsave = mp;
7211 	virt = mp->virt;
7212 	if (phba->sli_rev < LPFC_SLI_REV4) {
7213 		mb = &mbox->u.mb;
7214 		mb->un.varDmp.cv = 1;
7215 		mb->un.varDmp.co = 1;
7216 		mb->un.varWords[2] = 0;
7217 		mb->un.varWords[3] = DMP_SFF_PAGE_A0_SIZE / 4;
7218 		mb->un.varWords[4] = 0;
7219 		mb->un.varWords[5] = 0;
7220 		mb->un.varWords[6] = 0;
7221 		mb->un.varWords[7] = 0;
7222 		mb->un.varWords[8] = 0;
7223 		mb->un.varWords[9] = 0;
7224 		mb->un.varWords[10] = 0;
7225 		mbox->in_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
7226 		mbox->out_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
7227 		mbox->mbox_offset_word = 5;
7228 		mbox->ext_buf = virt;
7229 	} else {
7230 		bf_set(lpfc_mbx_memory_dump_type3_length,
7231 		       &mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A0_SIZE);
7232 		mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
7233 		mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
7234 	}
7235 	mbox->vport = phba->pport;
7236 	rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_SLI4_CONFIG_TMO);
7237 	if (rc == MBX_NOT_FINISHED) {
7238 		rc = 1;
7239 		goto error;
7240 	}
7241 	if (rc == MBX_TIMEOUT)
7242 		goto error;
7243 	if (phba->sli_rev == LPFC_SLI_REV4)
7244 		mp = mbox->ctx_buf;
7245 	else
7246 		mp = mpsave;
7247 
7248 	if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
7249 		rc = 1;
7250 		goto error;
7251 	}
7252 
7253 	lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a0,
7254 			     DMP_SFF_PAGE_A0_SIZE);
7255 
7256 	memset(mbox, 0, sizeof(*mbox));
7257 	memset(mp->virt, 0, DMP_SFF_PAGE_A2_SIZE);
7258 	INIT_LIST_HEAD(&mp->list);
7259 
7260 	/* save address for completion */
7261 	mbox->ctx_buf = mp;
7262 	mbox->vport = phba->pport;
7263 
7264 	bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_DUMP_MEMORY);
7265 	bf_set(lpfc_mbx_memory_dump_type3_type,
7266 	       &mbox->u.mqe.un.mem_dump_type3, DMP_LMSD);
7267 	bf_set(lpfc_mbx_memory_dump_type3_link,
7268 	       &mbox->u.mqe.un.mem_dump_type3, phba->sli4_hba.physical_port);
7269 	bf_set(lpfc_mbx_memory_dump_type3_page_no,
7270 	       &mbox->u.mqe.un.mem_dump_type3, DMP_PAGE_A2);
7271 	if (phba->sli_rev < LPFC_SLI_REV4) {
7272 		mb = &mbox->u.mb;
7273 		mb->un.varDmp.cv = 1;
7274 		mb->un.varDmp.co = 1;
7275 		mb->un.varWords[2] = 0;
7276 		mb->un.varWords[3] = DMP_SFF_PAGE_A2_SIZE / 4;
7277 		mb->un.varWords[4] = 0;
7278 		mb->un.varWords[5] = 0;
7279 		mb->un.varWords[6] = 0;
7280 		mb->un.varWords[7] = 0;
7281 		mb->un.varWords[8] = 0;
7282 		mb->un.varWords[9] = 0;
7283 		mb->un.varWords[10] = 0;
7284 		mbox->in_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
7285 		mbox->out_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
7286 		mbox->mbox_offset_word = 5;
7287 		mbox->ext_buf = virt;
7288 	} else {
7289 		bf_set(lpfc_mbx_memory_dump_type3_length,
7290 		       &mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A2_SIZE);
7291 		mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
7292 		mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
7293 	}
7294 
7295 	rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_SLI4_CONFIG_TMO);
7296 
7297 	if (rc == MBX_TIMEOUT)
7298 		goto error;
7299 	if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
7300 		rc = 1;
7301 		goto error;
7302 	}
7303 	rc = 0;
7304 
7305 	lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a2,
7306 			     DMP_SFF_PAGE_A2_SIZE);
7307 
7308 error:
7309 	if (mbox->mbox_flag & LPFC_MBX_WAKE) {
7310 		mbox->ctx_buf = mpsave;
7311 		lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
7312 	}
7313 
7314 	return rc;
7315 
7316 sfp_fail:
7317 	mempool_free(mbox, phba->mbox_mem_pool);
7318 	return 1;
7319 }
7320 
7321 /*
7322  * lpfc_els_rcv_rdp - Process an unsolicited RDP ELS.
7323  * @vport: pointer to a host virtual N_Port data structure.
7324  * @cmdiocb: pointer to lpfc command iocb data structure.
7325  * @ndlp: pointer to a node-list data structure.
7326  *
7327  * This routine processes an unsolicited RDP(Read Diagnostic Parameters)
7328  * IOCB. First, the payload of the unsolicited RDP is checked.
7329  * Then it will (1) send MBX_DUMP_MEMORY, Embedded DMP_LMSD sub command TYPE-3
7330  * for Page A0, (2) send MBX_DUMP_MEMORY, DMP_LMSD for Page A2,
7331  * (3) send MBX_READ_LNK_STAT to get link stat, (4) Call lpfc_els_rdp_cmpl
7332  * gather all data and send RDP response.
7333  *
7334  * Return code
7335  *   0 - Sent the acc response
7336  *   1 - Sent the reject response.
7337  */
7338 static int
lpfc_els_rcv_rdp(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)7339 lpfc_els_rcv_rdp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7340 		struct lpfc_nodelist *ndlp)
7341 {
7342 	struct lpfc_hba *phba = vport->phba;
7343 	struct lpfc_dmabuf *pcmd;
7344 	uint8_t rjt_err, rjt_expl = LSEXP_NOTHING_MORE;
7345 	struct fc_rdp_req_frame *rdp_req;
7346 	struct lpfc_rdp_context *rdp_context;
7347 	union lpfc_wqe128 *cmd = NULL;
7348 	struct ls_rjt stat;
7349 
7350 	if (phba->sli_rev < LPFC_SLI_REV4 ||
7351 	    bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7352 						LPFC_SLI_INTF_IF_TYPE_2) {
7353 		rjt_err = LSRJT_UNABLE_TPC;
7354 		rjt_expl = LSEXP_REQ_UNSUPPORTED;
7355 		goto error;
7356 	}
7357 
7358 	if (phba->sli_rev < LPFC_SLI_REV4 ||
7359 	    test_bit(HBA_FCOE_MODE, &phba->hba_flag)) {
7360 		rjt_err = LSRJT_UNABLE_TPC;
7361 		rjt_expl = LSEXP_REQ_UNSUPPORTED;
7362 		goto error;
7363 	}
7364 
7365 	pcmd = cmdiocb->cmd_dmabuf;
7366 	rdp_req = (struct fc_rdp_req_frame *) pcmd->virt;
7367 
7368 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7369 			 "2422 ELS RDP Request "
7370 			 "dec len %d tag x%x port_id %d len %d\n",
7371 			 be32_to_cpu(rdp_req->rdp_des_length),
7372 			 be32_to_cpu(rdp_req->nport_id_desc.tag),
7373 			 be32_to_cpu(rdp_req->nport_id_desc.nport_id),
7374 			 be32_to_cpu(rdp_req->nport_id_desc.length));
7375 
7376 	if (sizeof(struct fc_rdp_nport_desc) !=
7377 			be32_to_cpu(rdp_req->rdp_des_length))
7378 		goto rjt_logerr;
7379 	if (RDP_N_PORT_DESC_TAG != be32_to_cpu(rdp_req->nport_id_desc.tag))
7380 		goto rjt_logerr;
7381 	if (RDP_NPORT_ID_SIZE !=
7382 			be32_to_cpu(rdp_req->nport_id_desc.length))
7383 		goto rjt_logerr;
7384 	rdp_context = kzalloc(sizeof(struct lpfc_rdp_context), GFP_KERNEL);
7385 	if (!rdp_context) {
7386 		rjt_err = LSRJT_UNABLE_TPC;
7387 		goto error;
7388 	}
7389 
7390 	cmd = &cmdiocb->wqe;
7391 	rdp_context->ndlp = lpfc_nlp_get(ndlp);
7392 	if (!rdp_context->ndlp) {
7393 		kfree(rdp_context);
7394 		rjt_err = LSRJT_UNABLE_TPC;
7395 		goto error;
7396 	}
7397 	rdp_context->ox_id = bf_get(wqe_rcvoxid,
7398 				    &cmd->xmit_els_rsp.wqe_com);
7399 	rdp_context->rx_id = bf_get(wqe_ctxt_tag,
7400 				    &cmd->xmit_els_rsp.wqe_com);
7401 	rdp_context->cmpl = lpfc_els_rdp_cmpl;
7402 	if (lpfc_get_rdp_info(phba, rdp_context)) {
7403 		lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_ELS,
7404 				 "2423 Unable to send mailbox");
7405 		kfree(rdp_context);
7406 		rjt_err = LSRJT_UNABLE_TPC;
7407 		lpfc_nlp_put(ndlp);
7408 		goto error;
7409 	}
7410 
7411 	return 0;
7412 
7413 rjt_logerr:
7414 	rjt_err = LSRJT_LOGICAL_ERR;
7415 
7416 error:
7417 	memset(&stat, 0, sizeof(stat));
7418 	stat.un.b.lsRjtRsnCode = rjt_err;
7419 	stat.un.b.lsRjtRsnCodeExp = rjt_expl;
7420 	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7421 	return 1;
7422 }
7423 
7424 
7425 static void
lpfc_els_lcb_rsp(struct lpfc_hba * phba,LPFC_MBOXQ_t * pmb)7426 lpfc_els_lcb_rsp(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
7427 {
7428 	MAILBOX_t *mb;
7429 	IOCB_t *icmd;
7430 	union lpfc_wqe128 *wqe;
7431 	uint8_t *pcmd;
7432 	struct lpfc_iocbq *elsiocb;
7433 	struct lpfc_nodelist *ndlp;
7434 	struct ls_rjt *stat;
7435 	union lpfc_sli4_cfg_shdr *shdr;
7436 	struct lpfc_lcb_context *lcb_context;
7437 	struct fc_lcb_res_frame *lcb_res;
7438 	uint32_t cmdsize, shdr_status, shdr_add_status;
7439 	int rc;
7440 
7441 	mb = &pmb->u.mb;
7442 	lcb_context = pmb->ctx_u.lcb;
7443 	ndlp = lcb_context->ndlp;
7444 	memset(&pmb->ctx_u, 0, sizeof(pmb->ctx_u));
7445 	pmb->ctx_buf = NULL;
7446 
7447 	shdr = (union lpfc_sli4_cfg_shdr *)
7448 			&pmb->u.mqe.un.beacon_config.header.cfg_shdr;
7449 	shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
7450 	shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
7451 
7452 	lpfc_printf_log(phba, KERN_INFO, LOG_MBOX,
7453 				"0194 SET_BEACON_CONFIG mailbox "
7454 				"completed with status x%x add_status x%x,"
7455 				" mbx status x%x\n",
7456 				shdr_status, shdr_add_status, mb->mbxStatus);
7457 
7458 	if ((mb->mbxStatus != MBX_SUCCESS) || shdr_status ||
7459 	    (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE) ||
7460 	    (shdr_add_status == ADD_STATUS_INVALID_REQUEST)) {
7461 		mempool_free(pmb, phba->mbox_mem_pool);
7462 		goto error;
7463 	}
7464 
7465 	mempool_free(pmb, phba->mbox_mem_pool);
7466 	cmdsize = sizeof(struct fc_lcb_res_frame);
7467 	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7468 			lpfc_max_els_tries, ndlp,
7469 			ndlp->nlp_DID, ELS_CMD_ACC);
7470 
7471 	/* Decrement the ndlp reference count from previous mbox command */
7472 	lpfc_nlp_put(ndlp);
7473 
7474 	if (!elsiocb)
7475 		goto free_lcb_context;
7476 
7477 	lcb_res = (struct fc_lcb_res_frame *)elsiocb->cmd_dmabuf->virt;
7478 
7479 	memset(lcb_res, 0, sizeof(struct fc_lcb_res_frame));
7480 
7481 	if (phba->sli_rev == LPFC_SLI_REV4) {
7482 		wqe = &elsiocb->wqe;
7483 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
7484 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7485 		       lcb_context->ox_id);
7486 	} else {
7487 		icmd = &elsiocb->iocb;
7488 		icmd->ulpContext = lcb_context->rx_id;
7489 		icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7490 	}
7491 
7492 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7493 	*((uint32_t *)(pcmd)) = ELS_CMD_ACC;
7494 	lcb_res->lcb_sub_command = lcb_context->sub_command;
7495 	lcb_res->lcb_type = lcb_context->type;
7496 	lcb_res->capability = lcb_context->capability;
7497 	lcb_res->lcb_frequency = lcb_context->frequency;
7498 	lcb_res->lcb_duration = lcb_context->duration;
7499 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7500 	phba->fc_stat.elsXmitACC++;
7501 
7502 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
7503 	if (!elsiocb->ndlp) {
7504 		lpfc_els_free_iocb(phba, elsiocb);
7505 		goto out;
7506 	}
7507 
7508 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7509 	if (rc == IOCB_ERROR) {
7510 		lpfc_els_free_iocb(phba, elsiocb);
7511 		lpfc_nlp_put(ndlp);
7512 	}
7513  out:
7514 	kfree(lcb_context);
7515 	return;
7516 
7517 error:
7518 	cmdsize = sizeof(struct fc_lcb_res_frame);
7519 	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7520 				     lpfc_max_els_tries, ndlp,
7521 				     ndlp->nlp_DID, ELS_CMD_LS_RJT);
7522 	lpfc_nlp_put(ndlp);
7523 	if (!elsiocb)
7524 		goto free_lcb_context;
7525 
7526 	if (phba->sli_rev == LPFC_SLI_REV4) {
7527 		wqe = &elsiocb->wqe;
7528 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
7529 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7530 		       lcb_context->ox_id);
7531 	} else {
7532 		icmd = &elsiocb->iocb;
7533 		icmd->ulpContext = lcb_context->rx_id;
7534 		icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7535 	}
7536 
7537 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7538 
7539 	*((uint32_t *)(pcmd)) = ELS_CMD_LS_RJT;
7540 	stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7541 	stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7542 
7543 	if (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE)
7544 		stat->un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
7545 
7546 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7547 	phba->fc_stat.elsXmitLSRJT++;
7548 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
7549 	if (!elsiocb->ndlp) {
7550 		lpfc_els_free_iocb(phba, elsiocb);
7551 		goto free_lcb_context;
7552 	}
7553 
7554 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7555 	if (rc == IOCB_ERROR) {
7556 		lpfc_els_free_iocb(phba, elsiocb);
7557 		lpfc_nlp_put(ndlp);
7558 	}
7559 free_lcb_context:
7560 	kfree(lcb_context);
7561 }
7562 
7563 static int
lpfc_sli4_set_beacon(struct lpfc_vport * vport,struct lpfc_lcb_context * lcb_context,uint32_t beacon_state)7564 lpfc_sli4_set_beacon(struct lpfc_vport *vport,
7565 		     struct lpfc_lcb_context *lcb_context,
7566 		     uint32_t beacon_state)
7567 {
7568 	struct lpfc_hba *phba = vport->phba;
7569 	union lpfc_sli4_cfg_shdr *cfg_shdr;
7570 	LPFC_MBOXQ_t *mbox = NULL;
7571 	uint32_t len;
7572 	int rc;
7573 
7574 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7575 	if (!mbox)
7576 		return 1;
7577 
7578 	cfg_shdr = &mbox->u.mqe.un.sli4_config.header.cfg_shdr;
7579 	len = sizeof(struct lpfc_mbx_set_beacon_config) -
7580 		sizeof(struct lpfc_sli4_cfg_mhdr);
7581 	lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
7582 			 LPFC_MBOX_OPCODE_SET_BEACON_CONFIG, len,
7583 			 LPFC_SLI4_MBX_EMBED);
7584 	mbox->ctx_u.lcb = lcb_context;
7585 	mbox->vport = phba->pport;
7586 	mbox->mbox_cmpl = lpfc_els_lcb_rsp;
7587 	bf_set(lpfc_mbx_set_beacon_port_num, &mbox->u.mqe.un.beacon_config,
7588 	       phba->sli4_hba.physical_port);
7589 	bf_set(lpfc_mbx_set_beacon_state, &mbox->u.mqe.un.beacon_config,
7590 	       beacon_state);
7591 	mbox->u.mqe.un.beacon_config.word5 = 0;		/* Reserved */
7592 
7593 	/*
7594 	 *	Check bv1s bit before issuing the mailbox
7595 	 *	if bv1s == 1, LCB V1 supported
7596 	 *	else, LCB V0 supported
7597 	 */
7598 
7599 	if (phba->sli4_hba.pc_sli4_params.bv1s) {
7600 		/* COMMON_SET_BEACON_CONFIG_V1 */
7601 		cfg_shdr->request.word9 = BEACON_VERSION_V1;
7602 		lcb_context->capability |= LCB_CAPABILITY_DURATION;
7603 		bf_set(lpfc_mbx_set_beacon_port_type,
7604 		       &mbox->u.mqe.un.beacon_config, 0);
7605 		bf_set(lpfc_mbx_set_beacon_duration_v1,
7606 		       &mbox->u.mqe.un.beacon_config,
7607 		       be16_to_cpu(lcb_context->duration));
7608 	} else {
7609 		/* COMMON_SET_BEACON_CONFIG_V0 */
7610 		if (be16_to_cpu(lcb_context->duration) != 0) {
7611 			mempool_free(mbox, phba->mbox_mem_pool);
7612 			return 1;
7613 		}
7614 		cfg_shdr->request.word9 = BEACON_VERSION_V0;
7615 		lcb_context->capability &=  ~(LCB_CAPABILITY_DURATION);
7616 		bf_set(lpfc_mbx_set_beacon_state,
7617 		       &mbox->u.mqe.un.beacon_config, beacon_state);
7618 		bf_set(lpfc_mbx_set_beacon_port_type,
7619 		       &mbox->u.mqe.un.beacon_config, 1);
7620 		bf_set(lpfc_mbx_set_beacon_duration,
7621 		       &mbox->u.mqe.un.beacon_config,
7622 		       be16_to_cpu(lcb_context->duration));
7623 	}
7624 
7625 	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7626 	if (rc == MBX_NOT_FINISHED) {
7627 		mempool_free(mbox, phba->mbox_mem_pool);
7628 		return 1;
7629 	}
7630 
7631 	return 0;
7632 }
7633 
7634 
7635 /**
7636  * lpfc_els_rcv_lcb - Process an unsolicited LCB
7637  * @vport: pointer to a host virtual N_Port data structure.
7638  * @cmdiocb: pointer to lpfc command iocb data structure.
7639  * @ndlp: pointer to a node-list data structure.
7640  *
7641  * This routine processes an unsolicited LCB(LINK CABLE BEACON) IOCB.
7642  * First, the payload of the unsolicited LCB is checked.
7643  * Then based on Subcommand beacon will either turn on or off.
7644  *
7645  * Return code
7646  * 0 - Sent the acc response
7647  * 1 - Sent the reject response.
7648  **/
7649 static int
lpfc_els_rcv_lcb(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)7650 lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7651 		 struct lpfc_nodelist *ndlp)
7652 {
7653 	struct lpfc_hba *phba = vport->phba;
7654 	struct lpfc_dmabuf *pcmd;
7655 	uint8_t *lp;
7656 	struct fc_lcb_request_frame *beacon;
7657 	struct lpfc_lcb_context *lcb_context;
7658 	u8 state, rjt_err = 0;
7659 	struct ls_rjt stat;
7660 
7661 	pcmd = cmdiocb->cmd_dmabuf;
7662 	lp = (uint8_t *)pcmd->virt;
7663 	beacon = (struct fc_lcb_request_frame *)pcmd->virt;
7664 
7665 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7666 			"0192 ELS LCB Data x%x x%x x%x x%x sub x%x "
7667 			"type x%x frequency %x duration x%x\n",
7668 			lp[0], lp[1], lp[2],
7669 			beacon->lcb_command,
7670 			beacon->lcb_sub_command,
7671 			beacon->lcb_type,
7672 			beacon->lcb_frequency,
7673 			be16_to_cpu(beacon->lcb_duration));
7674 
7675 	if (beacon->lcb_sub_command != LPFC_LCB_ON &&
7676 	    beacon->lcb_sub_command != LPFC_LCB_OFF) {
7677 		rjt_err = LSRJT_CMD_UNSUPPORTED;
7678 		goto rjt;
7679 	}
7680 
7681 	if (phba->sli_rev < LPFC_SLI_REV4  ||
7682 	    test_bit(HBA_FCOE_MODE, &phba->hba_flag) ||
7683 	    (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7684 	    LPFC_SLI_INTF_IF_TYPE_2)) {
7685 		rjt_err = LSRJT_CMD_UNSUPPORTED;
7686 		goto rjt;
7687 	}
7688 
7689 	lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
7690 	if (!lcb_context) {
7691 		rjt_err = LSRJT_UNABLE_TPC;
7692 		goto rjt;
7693 	}
7694 
7695 	state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
7696 	lcb_context->sub_command = beacon->lcb_sub_command;
7697 	lcb_context->capability	= 0;
7698 	lcb_context->type = beacon->lcb_type;
7699 	lcb_context->frequency = beacon->lcb_frequency;
7700 	lcb_context->duration = beacon->lcb_duration;
7701 	lcb_context->ox_id = get_job_rcvoxid(phba, cmdiocb);
7702 	lcb_context->rx_id = get_job_ulpcontext(phba, cmdiocb);
7703 	lcb_context->ndlp = lpfc_nlp_get(ndlp);
7704 	if (!lcb_context->ndlp) {
7705 		rjt_err = LSRJT_UNABLE_TPC;
7706 		goto rjt_free;
7707 	}
7708 
7709 	if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
7710 		lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
7711 				 "0193 failed to send mail box");
7712 		lpfc_nlp_put(ndlp);
7713 		rjt_err = LSRJT_UNABLE_TPC;
7714 		goto rjt_free;
7715 	}
7716 	return 0;
7717 
7718 rjt_free:
7719 	kfree(lcb_context);
7720 rjt:
7721 	memset(&stat, 0, sizeof(stat));
7722 	stat.un.b.lsRjtRsnCode = rjt_err;
7723 	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7724 	return 1;
7725 }
7726 
7727 
7728 /**
7729  * lpfc_els_flush_rscn - Clean up any rscn activities with a vport
7730  * @vport: pointer to a host virtual N_Port data structure.
7731  *
7732  * This routine cleans up any Registration State Change Notification
7733  * (RSCN) activity with a @vport. Note that the fc_rscn_flush flag of the
7734  * @vport together with the host_lock is used to prevent multiple thread
7735  * trying to access the RSCN array on a same @vport at the same time.
7736  **/
7737 void
lpfc_els_flush_rscn(struct lpfc_vport * vport)7738 lpfc_els_flush_rscn(struct lpfc_vport *vport)
7739 {
7740 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7741 	struct lpfc_hba  *phba = vport->phba;
7742 	int i;
7743 
7744 	spin_lock_irq(shost->host_lock);
7745 	if (vport->fc_rscn_flush) {
7746 		/* Another thread is walking fc_rscn_id_list on this vport */
7747 		spin_unlock_irq(shost->host_lock);
7748 		return;
7749 	}
7750 	/* Indicate we are walking lpfc_els_flush_rscn on this vport */
7751 	vport->fc_rscn_flush = 1;
7752 	spin_unlock_irq(shost->host_lock);
7753 
7754 	for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7755 		lpfc_in_buf_free(phba, vport->fc_rscn_id_list[i]);
7756 		vport->fc_rscn_id_list[i] = NULL;
7757 	}
7758 	clear_bit(FC_RSCN_MODE, &vport->fc_flag);
7759 	clear_bit(FC_RSCN_DISCOVERY, &vport->fc_flag);
7760 	spin_lock_irq(shost->host_lock);
7761 	vport->fc_rscn_id_cnt = 0;
7762 	spin_unlock_irq(shost->host_lock);
7763 	lpfc_can_disctmo(vport);
7764 	/* Indicate we are done walking this fc_rscn_id_list */
7765 	vport->fc_rscn_flush = 0;
7766 }
7767 
7768 /**
7769  * lpfc_rscn_payload_check - Check whether there is a pending rscn to a did
7770  * @vport: pointer to a host virtual N_Port data structure.
7771  * @did: remote destination port identifier.
7772  *
7773  * This routine checks whether there is any pending Registration State
7774  * Configuration Notification (RSCN) to a @did on @vport.
7775  *
7776  * Return code
7777  *   None zero - The @did matched with a pending rscn
7778  *   0 - not able to match @did with a pending rscn
7779  **/
7780 int
lpfc_rscn_payload_check(struct lpfc_vport * vport,uint32_t did)7781 lpfc_rscn_payload_check(struct lpfc_vport *vport, uint32_t did)
7782 {
7783 	D_ID ns_did;
7784 	D_ID rscn_did;
7785 	uint32_t *lp;
7786 	uint32_t payload_len, i;
7787 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7788 
7789 	ns_did.un.word = did;
7790 
7791 	/* Never match fabric nodes for RSCNs */
7792 	if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
7793 		return 0;
7794 
7795 	/* If we are doing a FULL RSCN rediscovery, match everything */
7796 	if (test_bit(FC_RSCN_DISCOVERY, &vport->fc_flag))
7797 		return did;
7798 
7799 	spin_lock_irq(shost->host_lock);
7800 	if (vport->fc_rscn_flush) {
7801 		/* Another thread is walking fc_rscn_id_list on this vport */
7802 		spin_unlock_irq(shost->host_lock);
7803 		return 0;
7804 	}
7805 	/* Indicate we are walking fc_rscn_id_list on this vport */
7806 	vport->fc_rscn_flush = 1;
7807 	spin_unlock_irq(shost->host_lock);
7808 	for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7809 		lp = vport->fc_rscn_id_list[i]->virt;
7810 		payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7811 		payload_len -= sizeof(uint32_t);	/* take off word 0 */
7812 		while (payload_len) {
7813 			rscn_did.un.word = be32_to_cpu(*lp++);
7814 			payload_len -= sizeof(uint32_t);
7815 			switch (rscn_did.un.b.resv & RSCN_ADDRESS_FORMAT_MASK) {
7816 			case RSCN_ADDRESS_FORMAT_PORT:
7817 				if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7818 				    && (ns_did.un.b.area == rscn_did.un.b.area)
7819 				    && (ns_did.un.b.id == rscn_did.un.b.id))
7820 					goto return_did_out;
7821 				break;
7822 			case RSCN_ADDRESS_FORMAT_AREA:
7823 				if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7824 				    && (ns_did.un.b.area == rscn_did.un.b.area))
7825 					goto return_did_out;
7826 				break;
7827 			case RSCN_ADDRESS_FORMAT_DOMAIN:
7828 				if (ns_did.un.b.domain == rscn_did.un.b.domain)
7829 					goto return_did_out;
7830 				break;
7831 			case RSCN_ADDRESS_FORMAT_FABRIC:
7832 				goto return_did_out;
7833 			}
7834 		}
7835 	}
7836 	/* Indicate we are done with walking fc_rscn_id_list on this vport */
7837 	vport->fc_rscn_flush = 0;
7838 	return 0;
7839 return_did_out:
7840 	/* Indicate we are done with walking fc_rscn_id_list on this vport */
7841 	vport->fc_rscn_flush = 0;
7842 	return did;
7843 }
7844 
7845 /**
7846  * lpfc_rscn_recovery_check - Send recovery event to vport nodes matching rscn
7847  * @vport: pointer to a host virtual N_Port data structure.
7848  *
7849  * This routine sends recovery (NLP_EVT_DEVICE_RECOVERY) event to the
7850  * state machine for a @vport's nodes that are with pending RSCN (Registration
7851  * State Change Notification).
7852  *
7853  * Return code
7854  *   0 - Successful (currently alway return 0)
7855  **/
7856 static int
lpfc_rscn_recovery_check(struct lpfc_vport * vport)7857 lpfc_rscn_recovery_check(struct lpfc_vport *vport)
7858 {
7859 	struct lpfc_nodelist *ndlp = NULL, *n;
7860 
7861 	/* Move all affected nodes by pending RSCNs to NPR state. */
7862 	list_for_each_entry_safe(ndlp, n, &vport->fc_nodes, nlp_listp) {
7863 		if ((ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
7864 		    !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
7865 			continue;
7866 
7867 		/* NVME Target mode does not do RSCN Recovery. */
7868 		if (vport->phba->nvmet_support)
7869 			continue;
7870 
7871 		/* If we are in the process of doing discovery on this
7872 		 * NPort, let it continue on its own.
7873 		 */
7874 		switch (ndlp->nlp_state) {
7875 		case  NLP_STE_PLOGI_ISSUE:
7876 		case  NLP_STE_ADISC_ISSUE:
7877 		case  NLP_STE_REG_LOGIN_ISSUE:
7878 		case  NLP_STE_PRLI_ISSUE:
7879 		case  NLP_STE_LOGO_ISSUE:
7880 			continue;
7881 		}
7882 
7883 		lpfc_disc_state_machine(vport, ndlp, NULL,
7884 					NLP_EVT_DEVICE_RECOVERY);
7885 		lpfc_cancel_retry_delay_tmo(vport, ndlp);
7886 	}
7887 	return 0;
7888 }
7889 
7890 /**
7891  * lpfc_send_rscn_event - Send an RSCN event to management application
7892  * @vport: pointer to a host virtual N_Port data structure.
7893  * @cmdiocb: pointer to lpfc command iocb data structure.
7894  *
7895  * lpfc_send_rscn_event sends an RSCN netlink event to management
7896  * applications.
7897  */
7898 static void
lpfc_send_rscn_event(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb)7899 lpfc_send_rscn_event(struct lpfc_vport *vport,
7900 		struct lpfc_iocbq *cmdiocb)
7901 {
7902 	struct lpfc_dmabuf *pcmd;
7903 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7904 	uint32_t *payload_ptr;
7905 	uint32_t payload_len;
7906 	struct lpfc_rscn_event_header *rscn_event_data;
7907 
7908 	pcmd = cmdiocb->cmd_dmabuf;
7909 	payload_ptr = (uint32_t *) pcmd->virt;
7910 	payload_len = be32_to_cpu(*payload_ptr & ~ELS_CMD_MASK);
7911 
7912 	rscn_event_data = kmalloc(sizeof(struct lpfc_rscn_event_header) +
7913 		payload_len, GFP_KERNEL);
7914 	if (!rscn_event_data) {
7915 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
7916 			"0147 Failed to allocate memory for RSCN event\n");
7917 		return;
7918 	}
7919 	rscn_event_data->event_type = FC_REG_RSCN_EVENT;
7920 	rscn_event_data->payload_length = payload_len;
7921 	memcpy(rscn_event_data->rscn_payload, payload_ptr,
7922 		payload_len);
7923 
7924 	fc_host_post_vendor_event(shost,
7925 		fc_get_event_number(),
7926 		sizeof(struct lpfc_rscn_event_header) + payload_len,
7927 		(char *)rscn_event_data,
7928 		LPFC_NL_VENDOR_ID);
7929 
7930 	kfree(rscn_event_data);
7931 }
7932 
7933 /**
7934  * lpfc_els_rcv_rscn - Process an unsolicited rscn iocb
7935  * @vport: pointer to a host virtual N_Port data structure.
7936  * @cmdiocb: pointer to lpfc command iocb data structure.
7937  * @ndlp: pointer to a node-list data structure.
7938  *
7939  * This routine processes an unsolicited RSCN (Registration State Change
7940  * Notification) IOCB. First, the payload of the unsolicited RSCN is walked
7941  * to invoke fc_host_post_event() routine to the FC transport layer. If the
7942  * discover state machine is about to begin discovery, it just accepts the
7943  * RSCN and the discovery process will satisfy the RSCN. If this RSCN only
7944  * contains N_Port IDs for other vports on this HBA, it just accepts the
7945  * RSCN and ignore processing it. If the state machine is in the recovery
7946  * state, the fc_rscn_id_list of this @vport is walked and the
7947  * lpfc_rscn_recovery_check() routine is invoked to send recovery event for
7948  * all nodes that match RSCN payload. Otherwise, the lpfc_els_handle_rscn()
7949  * routine is invoked to handle the RSCN event.
7950  *
7951  * Return code
7952  *   0 - Just sent the acc response
7953  *   1 - Sent the acc response and waited for name server completion
7954  **/
7955 static int
lpfc_els_rcv_rscn(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)7956 lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7957 		  struct lpfc_nodelist *ndlp)
7958 {
7959 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7960 	struct lpfc_hba  *phba = vport->phba;
7961 	struct lpfc_dmabuf *pcmd;
7962 	uint32_t *lp, *datap;
7963 	uint32_t payload_len, length, nportid, *cmd;
7964 	int rscn_cnt;
7965 	int rscn_id = 0, hba_id = 0;
7966 	int i, tmo;
7967 
7968 	pcmd = cmdiocb->cmd_dmabuf;
7969 	lp = (uint32_t *) pcmd->virt;
7970 
7971 	payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7972 	payload_len -= sizeof(uint32_t);	/* take off word 0 */
7973 	/* RSCN received */
7974 	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7975 			 "0214 RSCN received Data: x%lx x%x x%x x%x\n",
7976 			 vport->fc_flag, payload_len, *lp,
7977 			 vport->fc_rscn_id_cnt);
7978 
7979 	/* Send an RSCN event to the management application */
7980 	lpfc_send_rscn_event(vport, cmdiocb);
7981 
7982 	for (i = 0; i < payload_len/sizeof(uint32_t); i++)
7983 		fc_host_post_event(shost, fc_get_event_number(),
7984 			FCH_EVT_RSCN, lp[i]);
7985 
7986 	/* Check if RSCN is coming from a direct-connected remote NPort */
7987 	if (test_bit(FC_PT2PT, &vport->fc_flag)) {
7988 		/* If so, just ACC it, no other action needed for now */
7989 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7990 				 "2024 pt2pt RSCN %08x Data: x%lx x%x\n",
7991 				 *lp, vport->fc_flag, payload_len);
7992 		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7993 
7994 		/* Check to see if we need to NVME rescan this target
7995 		 * remoteport.
7996 		 */
7997 		if (ndlp->nlp_fc4_type & NLP_FC4_NVME &&
7998 		    ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_DISCOVERY))
7999 			lpfc_nvme_rescan_port(vport, ndlp);
8000 		return 0;
8001 	}
8002 
8003 	/* If we are about to begin discovery, just ACC the RSCN.
8004 	 * Discovery processing will satisfy it.
8005 	 */
8006 	if (vport->port_state <= LPFC_NS_QRY) {
8007 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8008 			"RCV RSCN ignore: did:x%x/ste:x%x flg:x%lx",
8009 			ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8010 
8011 		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8012 		return 0;
8013 	}
8014 
8015 	/* If this RSCN just contains NPortIDs for other vports on this HBA,
8016 	 * just ACC and ignore it.
8017 	 */
8018 	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
8019 		!(vport->cfg_peer_port_login)) {
8020 		i = payload_len;
8021 		datap = lp;
8022 		while (i > 0) {
8023 			nportid = *datap++;
8024 			nportid = ((be32_to_cpu(nportid)) & Mask_DID);
8025 			i -= sizeof(uint32_t);
8026 			rscn_id++;
8027 			if (lpfc_find_vport_by_did(phba, nportid))
8028 				hba_id++;
8029 		}
8030 		if (rscn_id == hba_id) {
8031 			/* ALL NPortIDs in RSCN are on HBA */
8032 			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8033 					 "0219 Ignore RSCN "
8034 					 "Data: x%lx x%x x%x x%x\n",
8035 					 vport->fc_flag, payload_len,
8036 					 *lp, vport->fc_rscn_id_cnt);
8037 			lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8038 				"RCV RSCN vport:  did:x%x/ste:x%x flg:x%lx",
8039 				ndlp->nlp_DID, vport->port_state,
8040 				ndlp->nlp_flag);
8041 
8042 			lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb,
8043 				ndlp, NULL);
8044 			/* Restart disctmo if its already running */
8045 			if (test_bit(FC_DISC_TMO, &vport->fc_flag)) {
8046 				tmo = ((phba->fc_ratov * 3) + 3);
8047 				mod_timer(&vport->fc_disctmo,
8048 					  jiffies +
8049 					  msecs_to_jiffies(1000 * tmo));
8050 			}
8051 			return 0;
8052 		}
8053 	}
8054 
8055 	spin_lock_irq(shost->host_lock);
8056 	if (vport->fc_rscn_flush) {
8057 		/* Another thread is walking fc_rscn_id_list on this vport */
8058 		spin_unlock_irq(shost->host_lock);
8059 		set_bit(FC_RSCN_DISCOVERY, &vport->fc_flag);
8060 		/* Send back ACC */
8061 		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8062 		return 0;
8063 	}
8064 	/* Indicate we are walking fc_rscn_id_list on this vport */
8065 	vport->fc_rscn_flush = 1;
8066 	spin_unlock_irq(shost->host_lock);
8067 	/* Get the array count after successfully have the token */
8068 	rscn_cnt = vport->fc_rscn_id_cnt;
8069 	/* If we are already processing an RSCN, save the received
8070 	 * RSCN payload buffer, cmdiocb->cmd_dmabuf to process later.
8071 	 */
8072 	if (test_bit(FC_RSCN_MODE, &vport->fc_flag) ||
8073 	    test_bit(FC_NDISC_ACTIVE, &vport->fc_flag)) {
8074 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8075 			"RCV RSCN defer:  did:x%x/ste:x%x flg:x%lx",
8076 			ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8077 
8078 		set_bit(FC_RSCN_DEFERRED, &vport->fc_flag);
8079 
8080 		/* Restart disctmo if its already running */
8081 		if (test_bit(FC_DISC_TMO, &vport->fc_flag)) {
8082 			tmo = ((phba->fc_ratov * 3) + 3);
8083 			mod_timer(&vport->fc_disctmo,
8084 				  jiffies + msecs_to_jiffies(1000 * tmo));
8085 		}
8086 		if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
8087 		    !test_bit(FC_RSCN_DISCOVERY, &vport->fc_flag)) {
8088 			set_bit(FC_RSCN_MODE, &vport->fc_flag);
8089 			if (rscn_cnt) {
8090 				cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
8091 				length = be32_to_cpu(*cmd & ~ELS_CMD_MASK);
8092 			}
8093 			if ((rscn_cnt) &&
8094 			    (payload_len + length <= LPFC_BPL_SIZE)) {
8095 				*cmd &= ELS_CMD_MASK;
8096 				*cmd |= cpu_to_be32(payload_len + length);
8097 				memcpy(((uint8_t *)cmd) + length, lp,
8098 				       payload_len);
8099 			} else {
8100 				vport->fc_rscn_id_list[rscn_cnt] = pcmd;
8101 				vport->fc_rscn_id_cnt++;
8102 				/* If we zero, cmdiocb->cmd_dmabuf, the calling
8103 				 * routine will not try to free it.
8104 				 */
8105 				cmdiocb->cmd_dmabuf = NULL;
8106 			}
8107 			/* Deferred RSCN */
8108 			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8109 					 "0235 Deferred RSCN "
8110 					 "Data: x%x x%lx x%x\n",
8111 					 vport->fc_rscn_id_cnt, vport->fc_flag,
8112 					 vport->port_state);
8113 		} else {
8114 			set_bit(FC_RSCN_DISCOVERY, &vport->fc_flag);
8115 			/* ReDiscovery RSCN */
8116 			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8117 					 "0234 ReDiscovery RSCN "
8118 					 "Data: x%x x%lx x%x\n",
8119 					 vport->fc_rscn_id_cnt, vport->fc_flag,
8120 					 vport->port_state);
8121 		}
8122 		/* Indicate we are done walking fc_rscn_id_list on this vport */
8123 		vport->fc_rscn_flush = 0;
8124 		/* Send back ACC */
8125 		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8126 		/* send RECOVERY event for ALL nodes that match RSCN payload */
8127 		lpfc_rscn_recovery_check(vport);
8128 		return 0;
8129 	}
8130 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8131 		"RCV RSCN:        did:x%x/ste:x%x flg:x%lx",
8132 		ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8133 
8134 	set_bit(FC_RSCN_MODE, &vport->fc_flag);
8135 	vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
8136 	/* Indicate we are done walking fc_rscn_id_list on this vport */
8137 	vport->fc_rscn_flush = 0;
8138 	/*
8139 	 * If we zero, cmdiocb->cmd_dmabuf, the calling routine will
8140 	 * not try to free it.
8141 	 */
8142 	cmdiocb->cmd_dmabuf = NULL;
8143 	lpfc_set_disctmo(vport);
8144 	/* Send back ACC */
8145 	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8146 	/* send RECOVERY event for ALL nodes that match RSCN payload */
8147 	lpfc_rscn_recovery_check(vport);
8148 	return lpfc_els_handle_rscn(vport);
8149 }
8150 
8151 /**
8152  * lpfc_els_handle_rscn - Handle rscn for a vport
8153  * @vport: pointer to a host virtual N_Port data structure.
8154  *
8155  * This routine handles the Registration State Configuration Notification
8156  * (RSCN) for a @vport. If login to NameServer does not exist, a new ndlp shall
8157  * be created and a Port Login (PLOGI) to the NameServer is issued. Otherwise,
8158  * if the ndlp to NameServer exists, a Common Transport (CT) command to the
8159  * NameServer shall be issued. If CT command to the NameServer fails to be
8160  * issued, the lpfc_els_flush_rscn() routine shall be invoked to clean up any
8161  * RSCN activities with the @vport.
8162  *
8163  * Return code
8164  *   0 - Cleaned up rscn on the @vport
8165  *   1 - Wait for plogi to name server before proceed
8166  **/
8167 int
lpfc_els_handle_rscn(struct lpfc_vport * vport)8168 lpfc_els_handle_rscn(struct lpfc_vport *vport)
8169 {
8170 	struct lpfc_nodelist *ndlp;
8171 	struct lpfc_hba  *phba = vport->phba;
8172 
8173 	/* Ignore RSCN if the port is being torn down. */
8174 	if (test_bit(FC_UNLOADING, &vport->load_flag)) {
8175 		lpfc_els_flush_rscn(vport);
8176 		return 0;
8177 	}
8178 
8179 	/* Start timer for RSCN processing */
8180 	lpfc_set_disctmo(vport);
8181 
8182 	/* RSCN processed */
8183 	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8184 			 "0215 RSCN processed Data: x%lx x%x x%x x%x x%x x%x\n",
8185 			 vport->fc_flag, 0, vport->fc_rscn_id_cnt,
8186 			 vport->port_state, vport->num_disc_nodes,
8187 			 vport->gidft_inp);
8188 
8189 	/* To process RSCN, first compare RSCN data with NameServer */
8190 	vport->fc_ns_retry = 0;
8191 	vport->num_disc_nodes = 0;
8192 
8193 	ndlp = lpfc_findnode_did(vport, NameServer_DID);
8194 	if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
8195 		/* Good ndlp, issue CT Request to NameServer.  Need to
8196 		 * know how many gidfts were issued.  If none, then just
8197 		 * flush the RSCN.  Otherwise, the outstanding requests
8198 		 * need to complete.
8199 		 */
8200 		if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_FT) {
8201 			if (lpfc_issue_gidft(vport) > 0)
8202 				return 1;
8203 		} else if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_PT) {
8204 			if (lpfc_issue_gidpt(vport) > 0)
8205 				return 1;
8206 		} else {
8207 			return 1;
8208 		}
8209 	} else {
8210 		/* Nameserver login in question.  Revalidate. */
8211 		if (ndlp) {
8212 			ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
8213 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
8214 		} else {
8215 			ndlp = lpfc_nlp_init(vport, NameServer_DID);
8216 			if (!ndlp) {
8217 				lpfc_els_flush_rscn(vport);
8218 				return 0;
8219 			}
8220 			ndlp->nlp_prev_state = ndlp->nlp_state;
8221 			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
8222 		}
8223 		ndlp->nlp_type |= NLP_FABRIC;
8224 		lpfc_issue_els_plogi(vport, NameServer_DID, 0);
8225 		/* Wait for NameServer login cmpl before we can
8226 		 * continue
8227 		 */
8228 		return 1;
8229 	}
8230 
8231 	lpfc_els_flush_rscn(vport);
8232 	return 0;
8233 }
8234 
8235 /**
8236  * lpfc_els_rcv_flogi - Process an unsolicited flogi iocb
8237  * @vport: pointer to a host virtual N_Port data structure.
8238  * @cmdiocb: pointer to lpfc command iocb data structure.
8239  * @ndlp: pointer to a node-list data structure.
8240  *
8241  * This routine processes Fabric Login (FLOGI) IOCB received as an ELS
8242  * unsolicited event. An unsolicited FLOGI can be received in a point-to-
8243  * point topology. As an unsolicited FLOGI should not be received in a loop
8244  * mode, any unsolicited FLOGI received in loop mode shall be ignored. The
8245  * lpfc_check_sparm() routine is invoked to check the parameters in the
8246  * unsolicited FLOGI. If parameters validation failed, the routine
8247  * lpfc_els_rsp_reject() shall be called with reject reason code set to
8248  * LSEXP_SPARM_OPTIONS to reject the FLOGI. Otherwise, the Port WWN in the
8249  * FLOGI shall be compared with the Port WWN of the @vport to determine who
8250  * will initiate PLOGI. The higher lexicographical value party shall has
8251  * higher priority (as the winning port) and will initiate PLOGI and
8252  * communicate Port_IDs (Addresses) for both nodes in PLOGI. The result
8253  * of this will be marked in the @vport fc_flag field with FC_PT2PT_PLOGI
8254  * and then the lpfc_els_rsp_acc() routine is invoked to accept the FLOGI.
8255  *
8256  * Return code
8257  *   0 - Successfully processed the unsolicited flogi
8258  *   1 - Failed to process the unsolicited flogi
8259  **/
8260 static int
lpfc_els_rcv_flogi(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)8261 lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8262 		   struct lpfc_nodelist *ndlp)
8263 {
8264 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
8265 	struct lpfc_hba  *phba = vport->phba;
8266 	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf;
8267 	uint32_t *lp = (uint32_t *) pcmd->virt;
8268 	union lpfc_wqe128 *wqe = &cmdiocb->wqe;
8269 	struct serv_parm *sp;
8270 	LPFC_MBOXQ_t *mbox;
8271 	uint32_t cmd, did;
8272 	int rc;
8273 	unsigned long fc_flag = 0;
8274 	uint32_t port_state = 0;
8275 
8276 	/* Clear external loopback plug detected flag */
8277 	phba->link_flag &= ~LS_EXTERNAL_LOOPBACK;
8278 
8279 	cmd = *lp++;
8280 	sp = (struct serv_parm *) lp;
8281 
8282 	/* FLOGI received */
8283 
8284 	lpfc_set_disctmo(vport);
8285 
8286 	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
8287 		/* We should never receive a FLOGI in loop mode, ignore it */
8288 		did =  bf_get(wqe_els_did, &wqe->xmit_els_rsp.wqe_dest);
8289 
8290 		/* An FLOGI ELS command <elsCmd> was received from DID <did> in
8291 		   Loop Mode */
8292 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
8293 				 "0113 An FLOGI ELS command x%x was "
8294 				 "received from DID x%x in Loop Mode\n",
8295 				 cmd, did);
8296 		return 1;
8297 	}
8298 
8299 	(void) lpfc_check_sparm(vport, ndlp, sp, CLASS3, 1);
8300 
8301 	/*
8302 	 * If our portname is greater than the remote portname,
8303 	 * then we initiate Nport login.
8304 	 */
8305 
8306 	rc = memcmp(&vport->fc_portname, &sp->portName,
8307 		    sizeof(struct lpfc_name));
8308 
8309 	if (!rc) {
8310 		if (phba->sli_rev < LPFC_SLI_REV4) {
8311 			mbox = mempool_alloc(phba->mbox_mem_pool,
8312 					     GFP_KERNEL);
8313 			if (!mbox)
8314 				return 1;
8315 			lpfc_linkdown(phba);
8316 			lpfc_init_link(phba, mbox,
8317 				       phba->cfg_topology,
8318 				       phba->cfg_link_speed);
8319 			mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
8320 			mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
8321 			mbox->vport = vport;
8322 			rc = lpfc_sli_issue_mbox(phba, mbox,
8323 						 MBX_NOWAIT);
8324 			lpfc_set_loopback_flag(phba);
8325 			if (rc == MBX_NOT_FINISHED)
8326 				mempool_free(mbox, phba->mbox_mem_pool);
8327 			return 1;
8328 		}
8329 
8330 		/* External loopback plug insertion detected */
8331 		phba->link_flag |= LS_EXTERNAL_LOOPBACK;
8332 
8333 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_LIBDFC,
8334 				 "1119 External Loopback plug detected\n");
8335 
8336 		/* abort the flogi coming back to ourselves
8337 		 * due to external loopback on the port.
8338 		 */
8339 		lpfc_els_abort_flogi(phba);
8340 		return 0;
8341 
8342 	} else if (rc > 0) {	/* greater than */
8343 		set_bit(FC_PT2PT_PLOGI, &vport->fc_flag);
8344 
8345 		/* If we have the high WWPN we can assign our own
8346 		 * myDID; otherwise, we have to WAIT for a PLOGI
8347 		 * from the remote NPort to find out what it
8348 		 * will be.
8349 		 */
8350 		vport->fc_myDID = PT2PT_LocalID;
8351 	} else {
8352 		vport->fc_myDID = PT2PT_RemoteID;
8353 	}
8354 
8355 	/*
8356 	 * The vport state should go to LPFC_FLOGI only
8357 	 * AFTER we issue a FLOGI, not receive one.
8358 	 */
8359 	spin_lock_irq(shost->host_lock);
8360 	fc_flag = vport->fc_flag;
8361 	port_state = vport->port_state;
8362 	/* Acking an unsol FLOGI.  Count 1 for link bounce
8363 	 * work-around.
8364 	 */
8365 	vport->rcv_flogi_cnt++;
8366 	spin_unlock_irq(shost->host_lock);
8367 	set_bit(FC_PT2PT, &vport->fc_flag);
8368 	clear_bit(FC_FABRIC, &vport->fc_flag);
8369 	clear_bit(FC_PUBLIC_LOOP, &vport->fc_flag);
8370 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8371 			 "3311 Rcv Flogi PS x%x new PS x%x "
8372 			 "fc_flag x%lx new fc_flag x%lx\n",
8373 			 port_state, vport->port_state,
8374 			 fc_flag, vport->fc_flag);
8375 
8376 	/*
8377 	 * We temporarily set fc_myDID to make it look like we are
8378 	 * a Fabric. This is done just so we end up with the right
8379 	 * did / sid on the FLOGI ACC rsp.
8380 	 */
8381 	did = vport->fc_myDID;
8382 	vport->fc_myDID = Fabric_DID;
8383 
8384 	memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
8385 
8386 	/* Defer ACC response until AFTER we issue a FLOGI */
8387 	if (!test_bit(HBA_FLOGI_ISSUED, &phba->hba_flag)) {
8388 		phba->defer_flogi_acc.rx_id = bf_get(wqe_ctxt_tag,
8389 						     &wqe->xmit_els_rsp.wqe_com);
8390 		phba->defer_flogi_acc.ox_id = bf_get(wqe_rcvoxid,
8391 						     &wqe->xmit_els_rsp.wqe_com);
8392 
8393 		vport->fc_myDID = did;
8394 
8395 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8396 				 "3344 Deferring FLOGI ACC: rx_id: x%x,"
8397 				 " ox_id: x%x, hba_flag x%lx\n",
8398 				 phba->defer_flogi_acc.rx_id,
8399 				 phba->defer_flogi_acc.ox_id, phba->hba_flag);
8400 
8401 		phba->defer_flogi_acc.flag = true;
8402 
8403 		/* This nlp_get is paired with nlp_puts that reset the
8404 		 * defer_flogi_acc.flag back to false.  We need to retain
8405 		 * a kref on the ndlp until the deferred FLOGI ACC is
8406 		 * processed or cancelled.
8407 		 */
8408 		phba->defer_flogi_acc.ndlp = lpfc_nlp_get(ndlp);
8409 		return 0;
8410 	}
8411 
8412 	/* Send back ACC */
8413 	lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, cmdiocb, ndlp, NULL);
8414 
8415 	/* Now lets put fc_myDID back to what its supposed to be */
8416 	vport->fc_myDID = did;
8417 
8418 	return 0;
8419 }
8420 
8421 /**
8422  * lpfc_els_rcv_rnid - Process an unsolicited rnid iocb
8423  * @vport: pointer to a host virtual N_Port data structure.
8424  * @cmdiocb: pointer to lpfc command iocb data structure.
8425  * @ndlp: pointer to a node-list data structure.
8426  *
8427  * This routine processes Request Node Identification Data (RNID) IOCB
8428  * received as an ELS unsolicited event. Only when the RNID specified format
8429  * 0x0 or 0xDF (Topology Discovery Specific Node Identification Data)
8430  * present, this routine will invoke the lpfc_els_rsp_rnid_acc() routine to
8431  * Accept (ACC) the RNID ELS command. All the other RNID formats are
8432  * rejected by invoking the lpfc_els_rsp_reject() routine.
8433  *
8434  * Return code
8435  *   0 - Successfully processed rnid iocb (currently always return 0)
8436  **/
8437 static int
lpfc_els_rcv_rnid(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)8438 lpfc_els_rcv_rnid(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8439 		  struct lpfc_nodelist *ndlp)
8440 {
8441 	struct lpfc_dmabuf *pcmd;
8442 	uint32_t *lp;
8443 	RNID *rn;
8444 	struct ls_rjt stat;
8445 
8446 	pcmd = cmdiocb->cmd_dmabuf;
8447 	lp = (uint32_t *) pcmd->virt;
8448 
8449 	lp++;
8450 	rn = (RNID *) lp;
8451 
8452 	/* RNID received */
8453 
8454 	switch (rn->Format) {
8455 	case 0:
8456 	case RNID_TOPOLOGY_DISC:
8457 		/* Send back ACC */
8458 		lpfc_els_rsp_rnid_acc(vport, rn->Format, cmdiocb, ndlp);
8459 		break;
8460 	default:
8461 		/* Reject this request because format not supported */
8462 		stat.un.b.lsRjtRsvd0 = 0;
8463 		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8464 		stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8465 		stat.un.b.vendorUnique = 0;
8466 		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
8467 			NULL);
8468 	}
8469 	return 0;
8470 }
8471 
8472 /**
8473  * lpfc_els_rcv_echo - Process an unsolicited echo iocb
8474  * @vport: pointer to a host virtual N_Port data structure.
8475  * @cmdiocb: pointer to lpfc command iocb data structure.
8476  * @ndlp: pointer to a node-list data structure.
8477  *
8478  * Return code
8479  *   0 - Successfully processed echo iocb (currently always return 0)
8480  **/
8481 static int
lpfc_els_rcv_echo(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)8482 lpfc_els_rcv_echo(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8483 		  struct lpfc_nodelist *ndlp)
8484 {
8485 	uint8_t *pcmd;
8486 
8487 	pcmd = (uint8_t *)cmdiocb->cmd_dmabuf->virt;
8488 
8489 	/* skip over first word of echo command to find echo data */
8490 	pcmd += sizeof(uint32_t);
8491 
8492 	lpfc_els_rsp_echo_acc(vport, pcmd, cmdiocb, ndlp);
8493 	return 0;
8494 }
8495 
8496 /**
8497  * lpfc_els_rcv_lirr - Process an unsolicited lirr iocb
8498  * @vport: pointer to a host virtual N_Port data structure.
8499  * @cmdiocb: pointer to lpfc command iocb data structure.
8500  * @ndlp: pointer to a node-list data structure.
8501  *
8502  * This routine processes a Link Incident Report Registration(LIRR) IOCB
8503  * received as an ELS unsolicited event. Currently, this function just invokes
8504  * the lpfc_els_rsp_reject() routine to reject the LIRR IOCB unconditionally.
8505  *
8506  * Return code
8507  *   0 - Successfully processed lirr iocb (currently always return 0)
8508  **/
8509 static int
lpfc_els_rcv_lirr(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)8510 lpfc_els_rcv_lirr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8511 		  struct lpfc_nodelist *ndlp)
8512 {
8513 	struct ls_rjt stat;
8514 
8515 	/* For now, unconditionally reject this command */
8516 	stat.un.b.lsRjtRsvd0 = 0;
8517 	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8518 	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8519 	stat.un.b.vendorUnique = 0;
8520 	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8521 	return 0;
8522 }
8523 
8524 /**
8525  * lpfc_els_rcv_rrq - Process an unsolicited rrq iocb
8526  * @vport: pointer to a host virtual N_Port data structure.
8527  * @cmdiocb: pointer to lpfc command iocb data structure.
8528  * @ndlp: pointer to a node-list data structure.
8529  *
8530  * This routine processes a Reinstate Recovery Qualifier (RRQ) IOCB
8531  * received as an ELS unsolicited event. A request to RRQ shall only
8532  * be accepted if the Originator Nx_Port N_Port_ID or the Responder
8533  * Nx_Port N_Port_ID of the target Exchange is the same as the
8534  * N_Port_ID of the Nx_Port that makes the request. If the RRQ is
8535  * not accepted, an LS_RJT with reason code "Unable to perform
8536  * command request" and reason code explanation "Invalid Originator
8537  * S_ID" shall be returned. For now, we just unconditionally accept
8538  * RRQ from the target.
8539  **/
8540 static void
lpfc_els_rcv_rrq(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)8541 lpfc_els_rcv_rrq(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8542 		 struct lpfc_nodelist *ndlp)
8543 {
8544 	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8545 	if (vport->phba->sli_rev == LPFC_SLI_REV4)
8546 		lpfc_els_clear_rrq(vport, cmdiocb, ndlp);
8547 }
8548 
8549 /**
8550  * lpfc_els_rsp_rls_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
8551  * @phba: pointer to lpfc hba data structure.
8552  * @pmb: pointer to the driver internal queue element for mailbox command.
8553  *
8554  * This routine is the completion callback function for the MBX_READ_LNK_STAT
8555  * mailbox command. This callback function is to actually send the Accept
8556  * (ACC) response to a Read Link Status (RLS) unsolicited IOCB event. It
8557  * collects the link statistics from the completion of the MBX_READ_LNK_STAT
8558  * mailbox command, constructs the RLS response with the link statistics
8559  * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
8560  * response to the RLS.
8561  *
8562  * Note that the ndlp reference count will be incremented by 1 for holding the
8563  * ndlp and the reference to ndlp will be stored into the ndlp field of
8564  * the IOCB for the completion callback function to the RLS Accept Response
8565  * ELS IOCB command.
8566  *
8567  **/
8568 static void
lpfc_els_rsp_rls_acc(struct lpfc_hba * phba,LPFC_MBOXQ_t * pmb)8569 lpfc_els_rsp_rls_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
8570 {
8571 	int rc = 0;
8572 	MAILBOX_t *mb;
8573 	IOCB_t *icmd;
8574 	union lpfc_wqe128 *wqe;
8575 	struct RLS_RSP *rls_rsp;
8576 	uint8_t *pcmd;
8577 	struct lpfc_iocbq *elsiocb;
8578 	struct lpfc_nodelist *ndlp;
8579 	uint16_t oxid;
8580 	uint16_t rxid;
8581 	uint32_t cmdsize;
8582 	u32 ulp_context;
8583 
8584 	mb = &pmb->u.mb;
8585 
8586 	ndlp = pmb->ctx_ndlp;
8587 	rxid = (uint16_t)(pmb->ctx_u.ox_rx_id & 0xffff);
8588 	oxid = (uint16_t)((pmb->ctx_u.ox_rx_id >> 16) & 0xffff);
8589 	memset(&pmb->ctx_u, 0, sizeof(pmb->ctx_u));
8590 	pmb->ctx_ndlp = NULL;
8591 
8592 	if (mb->mbxStatus) {
8593 		mempool_free(pmb, phba->mbox_mem_pool);
8594 		return;
8595 	}
8596 
8597 	cmdsize = sizeof(struct RLS_RSP) + sizeof(uint32_t);
8598 	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8599 				     lpfc_max_els_tries, ndlp,
8600 				     ndlp->nlp_DID, ELS_CMD_ACC);
8601 
8602 	/* Decrement the ndlp reference count from previous mbox command */
8603 	lpfc_nlp_put(ndlp);
8604 
8605 	if (!elsiocb) {
8606 		mempool_free(pmb, phba->mbox_mem_pool);
8607 		return;
8608 	}
8609 
8610 	ulp_context = get_job_ulpcontext(phba, elsiocb);
8611 	if (phba->sli_rev == LPFC_SLI_REV4) {
8612 		wqe = &elsiocb->wqe;
8613 		/* Xri / rx_id */
8614 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, rxid);
8615 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com, oxid);
8616 	} else {
8617 		icmd = &elsiocb->iocb;
8618 		icmd->ulpContext = rxid;
8619 		icmd->unsli3.rcvsli3.ox_id = oxid;
8620 	}
8621 
8622 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8623 	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8624 	pcmd += sizeof(uint32_t); /* Skip past command */
8625 	rls_rsp = (struct RLS_RSP *)pcmd;
8626 
8627 	rls_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
8628 	rls_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
8629 	rls_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
8630 	rls_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
8631 	rls_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
8632 	rls_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
8633 	mempool_free(pmb, phba->mbox_mem_pool);
8634 	/* Xmit ELS RLS ACC response tag <ulpIoTag> */
8635 	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8636 			 "2874 Xmit ELS RLS ACC response tag x%x xri x%x, "
8637 			 "did x%x, nlp_flag x%lx, nlp_state x%x, rpi x%x\n",
8638 			 elsiocb->iotag, ulp_context,
8639 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8640 			 ndlp->nlp_rpi);
8641 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
8642 	phba->fc_stat.elsXmitACC++;
8643 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
8644 	if (!elsiocb->ndlp) {
8645 		lpfc_els_free_iocb(phba, elsiocb);
8646 		return;
8647 	}
8648 
8649 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8650 	if (rc == IOCB_ERROR) {
8651 		lpfc_els_free_iocb(phba, elsiocb);
8652 		lpfc_nlp_put(ndlp);
8653 	}
8654 	return;
8655 }
8656 
8657 /**
8658  * lpfc_els_rcv_rls - Process an unsolicited rls iocb
8659  * @vport: pointer to a host virtual N_Port data structure.
8660  * @cmdiocb: pointer to lpfc command iocb data structure.
8661  * @ndlp: pointer to a node-list data structure.
8662  *
8663  * This routine processes Read Link Status (RLS) IOCB received as an
8664  * ELS unsolicited event. It first checks the remote port state. If the
8665  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8666  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8667  * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
8668  * for reading the HBA link statistics. It is for the callback function,
8669  * lpfc_els_rsp_rls_acc(), set to the MBX_READ_LNK_STAT mailbox command
8670  * to actually sending out RPL Accept (ACC) response.
8671  *
8672  * Return codes
8673  *   0 - Successfully processed rls iocb (currently always return 0)
8674  **/
8675 static int
lpfc_els_rcv_rls(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)8676 lpfc_els_rcv_rls(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8677 		 struct lpfc_nodelist *ndlp)
8678 {
8679 	struct lpfc_hba *phba = vport->phba;
8680 	LPFC_MBOXQ_t *mbox;
8681 	struct ls_rjt stat;
8682 	u32 ctx = get_job_ulpcontext(phba, cmdiocb);
8683 	u32 ox_id = get_job_rcvoxid(phba, cmdiocb);
8684 
8685 	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8686 	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8687 		/* reject the unsolicited RLS request and done with it */
8688 		goto reject_out;
8689 
8690 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
8691 	if (mbox) {
8692 		lpfc_read_lnk_stat(phba, mbox);
8693 		mbox->ctx_u.ox_rx_id = ox_id << 16 | ctx;
8694 		mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
8695 		if (!mbox->ctx_ndlp)
8696 			goto node_err;
8697 		mbox->vport = vport;
8698 		mbox->mbox_cmpl = lpfc_els_rsp_rls_acc;
8699 		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
8700 			!= MBX_NOT_FINISHED)
8701 			/* Mbox completion will send ELS Response */
8702 			return 0;
8703 		/* Decrement reference count used for the failed mbox
8704 		 * command.
8705 		 */
8706 		lpfc_nlp_put(ndlp);
8707 node_err:
8708 		mempool_free(mbox, phba->mbox_mem_pool);
8709 	}
8710 reject_out:
8711 	/* issue rejection response */
8712 	stat.un.b.lsRjtRsvd0 = 0;
8713 	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8714 	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8715 	stat.un.b.vendorUnique = 0;
8716 	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8717 	return 0;
8718 }
8719 
8720 /**
8721  * lpfc_els_rcv_rtv - Process an unsolicited rtv iocb
8722  * @vport: pointer to a host virtual N_Port data structure.
8723  * @cmdiocb: pointer to lpfc command iocb data structure.
8724  * @ndlp: pointer to a node-list data structure.
8725  *
8726  * This routine processes Read Timout Value (RTV) IOCB received as an
8727  * ELS unsolicited event. It first checks the remote port state. If the
8728  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8729  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8730  * response. Otherwise, it sends the Accept(ACC) response to a Read Timeout
8731  * Value (RTV) unsolicited IOCB event.
8732  *
8733  * Note that the ndlp reference count will be incremented by 1 for holding the
8734  * ndlp and the reference to ndlp will be stored into the ndlp field of
8735  * the IOCB for the completion callback function to the RTV Accept Response
8736  * ELS IOCB command.
8737  *
8738  * Return codes
8739  *   0 - Successfully processed rtv iocb (currently always return 0)
8740  **/
8741 static int
lpfc_els_rcv_rtv(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)8742 lpfc_els_rcv_rtv(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8743 		 struct lpfc_nodelist *ndlp)
8744 {
8745 	int rc = 0;
8746 	IOCB_t *icmd;
8747 	union lpfc_wqe128 *wqe;
8748 	struct lpfc_hba *phba = vport->phba;
8749 	struct ls_rjt stat;
8750 	struct RTV_RSP *rtv_rsp;
8751 	uint8_t *pcmd;
8752 	struct lpfc_iocbq *elsiocb;
8753 	uint32_t cmdsize;
8754 	u32 ulp_context;
8755 
8756 	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8757 	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8758 		/* reject the unsolicited RTV request and done with it */
8759 		goto reject_out;
8760 
8761 	cmdsize = sizeof(struct RTV_RSP) + sizeof(uint32_t);
8762 	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8763 				     lpfc_max_els_tries, ndlp,
8764 				     ndlp->nlp_DID, ELS_CMD_ACC);
8765 
8766 	if (!elsiocb)
8767 		return 1;
8768 
8769 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8770 	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8771 	pcmd += sizeof(uint32_t); /* Skip past command */
8772 
8773 	ulp_context = get_job_ulpcontext(phba, elsiocb);
8774 	/* use the command's xri in the response */
8775 	if (phba->sli_rev == LPFC_SLI_REV4) {
8776 		wqe = &elsiocb->wqe;
8777 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
8778 		       get_job_ulpcontext(phba, cmdiocb));
8779 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
8780 		       get_job_rcvoxid(phba, cmdiocb));
8781 	} else {
8782 		icmd = &elsiocb->iocb;
8783 		icmd->ulpContext = get_job_ulpcontext(phba, cmdiocb);
8784 		icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, cmdiocb);
8785 	}
8786 
8787 	rtv_rsp = (struct RTV_RSP *)pcmd;
8788 
8789 	/* populate RTV payload */
8790 	rtv_rsp->ratov = cpu_to_be32(phba->fc_ratov * 1000); /* report msecs */
8791 	rtv_rsp->edtov = cpu_to_be32(phba->fc_edtov);
8792 	bf_set(qtov_edtovres, rtv_rsp, phba->fc_edtovResol ? 1 : 0);
8793 	bf_set(qtov_rttov, rtv_rsp, 0); /* Field is for FC ONLY */
8794 	rtv_rsp->qtov = cpu_to_be32(rtv_rsp->qtov);
8795 
8796 	/* Xmit ELS RLS ACC response tag <ulpIoTag> */
8797 	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8798 			 "2875 Xmit ELS RTV ACC response tag x%x xri x%x, "
8799 			 "did x%x, nlp_flag x%lx, nlp_state x%x, rpi x%x, "
8800 			 "Data: x%x x%x x%x\n",
8801 			 elsiocb->iotag, ulp_context,
8802 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8803 			 ndlp->nlp_rpi,
8804 			rtv_rsp->ratov, rtv_rsp->edtov, rtv_rsp->qtov);
8805 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
8806 	phba->fc_stat.elsXmitACC++;
8807 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
8808 	if (!elsiocb->ndlp) {
8809 		lpfc_els_free_iocb(phba, elsiocb);
8810 		return 0;
8811 	}
8812 
8813 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8814 	if (rc == IOCB_ERROR) {
8815 		lpfc_els_free_iocb(phba, elsiocb);
8816 		lpfc_nlp_put(ndlp);
8817 	}
8818 	return 0;
8819 
8820 reject_out:
8821 	/* issue rejection response */
8822 	stat.un.b.lsRjtRsvd0 = 0;
8823 	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8824 	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8825 	stat.un.b.vendorUnique = 0;
8826 	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8827 	return 0;
8828 }
8829 
8830 /* lpfc_issue_els_rrq - Process an unsolicited rrq iocb
8831  * @vport: pointer to a host virtual N_Port data structure.
8832  * @ndlp: pointer to a node-list data structure.
8833  * @did: DID of the target.
8834  * @rrq: Pointer to the rrq struct.
8835  *
8836  * Build a ELS RRQ command and send it to the target. If the issue_iocb is
8837  * successful, the completion handler will clear the RRQ.
8838  *
8839  * Return codes
8840  *   0 - Successfully sent rrq els iocb.
8841  *   1 - Failed to send rrq els iocb.
8842  **/
8843 static int
lpfc_issue_els_rrq(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,uint32_t did,struct lpfc_node_rrq * rrq)8844 lpfc_issue_els_rrq(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
8845 			uint32_t did, struct lpfc_node_rrq *rrq)
8846 {
8847 	struct lpfc_hba  *phba = vport->phba;
8848 	struct RRQ *els_rrq;
8849 	struct lpfc_iocbq *elsiocb;
8850 	uint8_t *pcmd;
8851 	uint16_t cmdsize;
8852 	int ret;
8853 
8854 	if (!ndlp)
8855 		return 1;
8856 
8857 	/* If ndlp is not NULL, we will bump the reference count on it */
8858 	cmdsize = (sizeof(uint32_t) + sizeof(struct RRQ));
8859 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, did,
8860 				     ELS_CMD_RRQ);
8861 	if (!elsiocb)
8862 		return 1;
8863 
8864 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8865 
8866 	/* For RRQ request, remainder of payload is Exchange IDs */
8867 	*((uint32_t *) (pcmd)) = ELS_CMD_RRQ;
8868 	pcmd += sizeof(uint32_t);
8869 	els_rrq = (struct RRQ *) pcmd;
8870 
8871 	bf_set(rrq_oxid, els_rrq, phba->sli4_hba.xri_ids[rrq->xritag]);
8872 	bf_set(rrq_rxid, els_rrq, rrq->rxid);
8873 	bf_set(rrq_did, els_rrq, vport->fc_myDID);
8874 	els_rrq->rrq = cpu_to_be32(els_rrq->rrq);
8875 	els_rrq->rrq_exchg = cpu_to_be32(els_rrq->rrq_exchg);
8876 
8877 
8878 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
8879 		"Issue RRQ:     did:x%x",
8880 		did, rrq->xritag, rrq->rxid);
8881 	elsiocb->context_un.rrq = rrq;
8882 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rrq;
8883 
8884 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
8885 	if (!elsiocb->ndlp)
8886 		goto io_err;
8887 
8888 	ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8889 	if (ret == IOCB_ERROR) {
8890 		lpfc_nlp_put(ndlp);
8891 		goto io_err;
8892 	}
8893 	return 0;
8894 
8895  io_err:
8896 	lpfc_els_free_iocb(phba, elsiocb);
8897 	return 1;
8898 }
8899 
8900 /**
8901  * lpfc_send_rrq - Sends ELS RRQ if needed.
8902  * @phba: pointer to lpfc hba data structure.
8903  * @rrq: pointer to the active rrq.
8904  *
8905  * This routine will call the lpfc_issue_els_rrq if the rrq is
8906  * still active for the xri. If this function returns a failure then
8907  * the caller needs to clean up the RRQ by calling lpfc_clr_active_rrq.
8908  *
8909  * Returns 0 Success.
8910  *         1 Failure.
8911  **/
8912 int
lpfc_send_rrq(struct lpfc_hba * phba,struct lpfc_node_rrq * rrq)8913 lpfc_send_rrq(struct lpfc_hba *phba, struct lpfc_node_rrq *rrq)
8914 {
8915 	struct lpfc_nodelist *ndlp = lpfc_findnode_did(rrq->vport,
8916 						       rrq->nlp_DID);
8917 	if (!ndlp)
8918 		return 1;
8919 
8920 	if (lpfc_test_rrq_active(phba, ndlp, rrq->xritag))
8921 		return lpfc_issue_els_rrq(rrq->vport, ndlp,
8922 					 rrq->nlp_DID, rrq);
8923 	else
8924 		return 1;
8925 }
8926 
8927 /**
8928  * lpfc_els_rsp_rpl_acc - Issue an accept rpl els command
8929  * @vport: pointer to a host virtual N_Port data structure.
8930  * @cmdsize: size of the ELS command.
8931  * @oldiocb: pointer to the original lpfc command iocb data structure.
8932  * @ndlp: pointer to a node-list data structure.
8933  *
8934  * This routine issuees an Accept (ACC) Read Port List (RPL) ELS command.
8935  * It is to be called by the lpfc_els_rcv_rpl() routine to accept the RPL.
8936  *
8937  * Note that the ndlp reference count will be incremented by 1 for holding the
8938  * ndlp and the reference to ndlp will be stored into the ndlp field of
8939  * the IOCB for the completion callback function to the RPL Accept Response
8940  * ELS command.
8941  *
8942  * Return code
8943  *   0 - Successfully issued ACC RPL ELS command
8944  *   1 - Failed to issue ACC RPL ELS command
8945  **/
8946 static int
lpfc_els_rsp_rpl_acc(struct lpfc_vport * vport,uint16_t cmdsize,struct lpfc_iocbq * oldiocb,struct lpfc_nodelist * ndlp)8947 lpfc_els_rsp_rpl_acc(struct lpfc_vport *vport, uint16_t cmdsize,
8948 		     struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
8949 {
8950 	int rc = 0;
8951 	struct lpfc_hba *phba = vport->phba;
8952 	IOCB_t *icmd;
8953 	union lpfc_wqe128 *wqe;
8954 	RPL_RSP rpl_rsp;
8955 	struct lpfc_iocbq *elsiocb;
8956 	uint8_t *pcmd;
8957 	u32 ulp_context;
8958 
8959 	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
8960 				     ndlp->nlp_DID, ELS_CMD_ACC);
8961 
8962 	if (!elsiocb)
8963 		return 1;
8964 
8965 	ulp_context = get_job_ulpcontext(phba, elsiocb);
8966 	if (phba->sli_rev == LPFC_SLI_REV4) {
8967 		wqe = &elsiocb->wqe;
8968 		/* Xri / rx_id */
8969 		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
8970 		       get_job_ulpcontext(phba, oldiocb));
8971 		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
8972 		       get_job_rcvoxid(phba, oldiocb));
8973 	} else {
8974 		icmd = &elsiocb->iocb;
8975 		icmd->ulpContext = get_job_ulpcontext(phba, oldiocb);
8976 		icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, oldiocb);
8977 	}
8978 
8979 	pcmd = elsiocb->cmd_dmabuf->virt;
8980 	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8981 	pcmd += sizeof(uint16_t);
8982 	*((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
8983 	pcmd += sizeof(uint16_t);
8984 
8985 	/* Setup the RPL ACC payload */
8986 	rpl_rsp.listLen = be32_to_cpu(1);
8987 	rpl_rsp.index = 0;
8988 	rpl_rsp.port_num_blk.portNum = 0;
8989 	rpl_rsp.port_num_blk.portID = be32_to_cpu(vport->fc_myDID);
8990 	memcpy(&rpl_rsp.port_num_blk.portName, &vport->fc_portname,
8991 	    sizeof(struct lpfc_name));
8992 	memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
8993 	/* Xmit ELS RPL ACC response tag <ulpIoTag> */
8994 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8995 			 "0120 Xmit ELS RPL ACC response tag x%x "
8996 			 "xri x%x, did x%x, nlp_flag x%lx, nlp_state x%x, "
8997 			 "rpi x%x\n",
8998 			 elsiocb->iotag, ulp_context,
8999 			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
9000 			 ndlp->nlp_rpi);
9001 	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
9002 	phba->fc_stat.elsXmitACC++;
9003 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
9004 	if (!elsiocb->ndlp) {
9005 		lpfc_els_free_iocb(phba, elsiocb);
9006 		return 1;
9007 	}
9008 
9009 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
9010 	if (rc == IOCB_ERROR) {
9011 		lpfc_els_free_iocb(phba, elsiocb);
9012 		lpfc_nlp_put(ndlp);
9013 		return 1;
9014 	}
9015 
9016 	return 0;
9017 }
9018 
9019 /**
9020  * lpfc_els_rcv_rpl - Process an unsolicited rpl iocb
9021  * @vport: pointer to a host virtual N_Port data structure.
9022  * @cmdiocb: pointer to lpfc command iocb data structure.
9023  * @ndlp: pointer to a node-list data structure.
9024  *
9025  * This routine processes Read Port List (RPL) IOCB received as an ELS
9026  * unsolicited event. It first checks the remote port state. If the remote
9027  * port is not in NLP_STE_UNMAPPED_NODE and NLP_STE_MAPPED_NODE states, it
9028  * invokes the lpfc_els_rsp_reject() routine to send reject response.
9029  * Otherwise, this routine then invokes the lpfc_els_rsp_rpl_acc() routine
9030  * to accept the RPL.
9031  *
9032  * Return code
9033  *   0 - Successfully processed rpl iocb (currently always return 0)
9034  **/
9035 static int
lpfc_els_rcv_rpl(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)9036 lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9037 		 struct lpfc_nodelist *ndlp)
9038 {
9039 	struct lpfc_dmabuf *pcmd;
9040 	uint32_t *lp;
9041 	uint32_t maxsize;
9042 	uint16_t cmdsize;
9043 	RPL *rpl;
9044 	struct ls_rjt stat;
9045 
9046 	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
9047 	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
9048 		/* issue rejection response */
9049 		stat.un.b.lsRjtRsvd0 = 0;
9050 		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
9051 		stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
9052 		stat.un.b.vendorUnique = 0;
9053 		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
9054 			NULL);
9055 		/* rejected the unsolicited RPL request and done with it */
9056 		return 0;
9057 	}
9058 
9059 	pcmd = cmdiocb->cmd_dmabuf;
9060 	lp = (uint32_t *) pcmd->virt;
9061 	rpl = (RPL *) (lp + 1);
9062 	maxsize = be32_to_cpu(rpl->maxsize);
9063 
9064 	/* We support only one port */
9065 	if ((rpl->index == 0) &&
9066 	    ((maxsize == 0) ||
9067 	     ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
9068 		cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
9069 	} else {
9070 		cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
9071 	}
9072 	lpfc_els_rsp_rpl_acc(vport, cmdsize, cmdiocb, ndlp);
9073 
9074 	return 0;
9075 }
9076 
9077 /**
9078  * lpfc_els_rcv_farp - Process an unsolicited farp request els command
9079  * @vport: pointer to a virtual N_Port data structure.
9080  * @cmdiocb: pointer to lpfc command iocb data structure.
9081  * @ndlp: pointer to a node-list data structure.
9082  *
9083  * This routine processes Fibre Channel Address Resolution Protocol
9084  * (FARP) Request IOCB received as an ELS unsolicited event. Currently,
9085  * the lpfc driver only supports matching on WWPN or WWNN for FARP. As such,
9086  * FARP_MATCH_PORT flag and FARP_MATCH_NODE flag are checked against the
9087  * Match Flag in the FARP request IOCB: if FARP_MATCH_PORT flag is set, the
9088  * remote PortName is compared against the FC PortName stored in the @vport
9089  * data structure; if FARP_MATCH_NODE flag is set, the remote NodeName is
9090  * compared against the FC NodeName stored in the @vport data structure.
9091  * If any of these matches and the FARP_REQUEST_FARPR flag is set in the
9092  * FARP request IOCB Response Flag, the lpfc_issue_els_farpr() routine is
9093  * invoked to send out FARP Response to the remote node. Before sending the
9094  * FARP Response, however, the FARP_REQUEST_PLOGI flag is check in the FARP
9095  * request IOCB Response Flag and, if it is set, the lpfc_issue_els_plogi()
9096  * routine is invoked to log into the remote port first.
9097  *
9098  * Return code
9099  *   0 - Either the FARP Match Mode not supported or successfully processed
9100  **/
9101 static int
lpfc_els_rcv_farp(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)9102 lpfc_els_rcv_farp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9103 		  struct lpfc_nodelist *ndlp)
9104 {
9105 	struct lpfc_dmabuf *pcmd;
9106 	uint32_t *lp;
9107 	FARP *fp;
9108 	uint32_t cnt, did;
9109 
9110 	did = get_job_els_rsp64_did(vport->phba, cmdiocb);
9111 	pcmd = cmdiocb->cmd_dmabuf;
9112 	lp = (uint32_t *) pcmd->virt;
9113 
9114 	lp++;
9115 	fp = (FARP *) lp;
9116 	/* FARP-REQ received from DID <did> */
9117 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9118 			 "0601 FARP-REQ received from DID x%x\n", did);
9119 	/* We will only support match on WWPN or WWNN */
9120 	if (fp->Mflags & ~(FARP_MATCH_NODE | FARP_MATCH_PORT)) {
9121 		return 0;
9122 	}
9123 
9124 	cnt = 0;
9125 	/* If this FARP command is searching for my portname */
9126 	if (fp->Mflags & FARP_MATCH_PORT) {
9127 		if (memcmp(&fp->RportName, &vport->fc_portname,
9128 			   sizeof(struct lpfc_name)) == 0)
9129 			cnt = 1;
9130 	}
9131 
9132 	/* If this FARP command is searching for my nodename */
9133 	if (fp->Mflags & FARP_MATCH_NODE) {
9134 		if (memcmp(&fp->RnodeName, &vport->fc_nodename,
9135 			   sizeof(struct lpfc_name)) == 0)
9136 			cnt = 1;
9137 	}
9138 
9139 	if (cnt) {
9140 		if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
9141 		   (ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
9142 			/* Log back into the node before sending the FARP. */
9143 			if (fp->Rflags & FARP_REQUEST_PLOGI) {
9144 				ndlp->nlp_prev_state = ndlp->nlp_state;
9145 				lpfc_nlp_set_state(vport, ndlp,
9146 						   NLP_STE_PLOGI_ISSUE);
9147 				lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
9148 			}
9149 
9150 			/* Send a FARP response to that node */
9151 			if (fp->Rflags & FARP_REQUEST_FARPR)
9152 				lpfc_issue_els_farpr(vport, did, 0);
9153 		}
9154 	}
9155 	return 0;
9156 }
9157 
9158 /**
9159  * lpfc_els_rcv_farpr - Process an unsolicited farp response iocb
9160  * @vport: pointer to a host virtual N_Port data structure.
9161  * @cmdiocb: pointer to lpfc command iocb data structure.
9162  * @ndlp: pointer to a node-list data structure.
9163  *
9164  * This routine processes Fibre Channel Address Resolution Protocol
9165  * Response (FARPR) IOCB received as an ELS unsolicited event. It simply
9166  * invokes the lpfc_els_rsp_acc() routine to the remote node to accept
9167  * the FARP response request.
9168  *
9169  * Return code
9170  *   0 - Successfully processed FARPR IOCB (currently always return 0)
9171  **/
9172 static int
lpfc_els_rcv_farpr(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)9173 lpfc_els_rcv_farpr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9174 		   struct lpfc_nodelist  *ndlp)
9175 {
9176 	uint32_t did;
9177 
9178 	did = get_job_els_rsp64_did(vport->phba, cmdiocb);
9179 
9180 	/* FARP-RSP received from DID <did> */
9181 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9182 			 "0600 FARP-RSP received from DID x%x\n", did);
9183 	/* ACCEPT the Farp resp request */
9184 	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
9185 
9186 	return 0;
9187 }
9188 
9189 /**
9190  * lpfc_els_rcv_fan - Process an unsolicited fan iocb command
9191  * @vport: pointer to a host virtual N_Port data structure.
9192  * @cmdiocb: pointer to lpfc command iocb data structure.
9193  * @fan_ndlp: pointer to a node-list data structure.
9194  *
9195  * This routine processes a Fabric Address Notification (FAN) IOCB
9196  * command received as an ELS unsolicited event. The FAN ELS command will
9197  * only be processed on a physical port (i.e., the @vport represents the
9198  * physical port). The fabric NodeName and PortName from the FAN IOCB are
9199  * compared against those in the phba data structure. If any of those is
9200  * different, the lpfc_initial_flogi() routine is invoked to initialize
9201  * Fabric Login (FLOGI) to the fabric to start the discover over. Otherwise,
9202  * if both of those are identical, the lpfc_issue_fabric_reglogin() routine
9203  * is invoked to register login to the fabric.
9204  *
9205  * Return code
9206  *   0 - Successfully processed fan iocb (currently always return 0).
9207  **/
9208 static int
lpfc_els_rcv_fan(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * fan_ndlp)9209 lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9210 		 struct lpfc_nodelist *fan_ndlp)
9211 {
9212 	struct lpfc_hba *phba = vport->phba;
9213 	uint32_t *lp;
9214 	FAN *fp;
9215 
9216 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
9217 	lp = (uint32_t *)cmdiocb->cmd_dmabuf->virt;
9218 	fp = (FAN *) ++lp;
9219 	/* FAN received; Fan does not have a reply sequence */
9220 	if ((vport == phba->pport) &&
9221 	    (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
9222 		if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
9223 			    sizeof(struct lpfc_name))) ||
9224 		    (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
9225 			    sizeof(struct lpfc_name)))) {
9226 			/* This port has switched fabrics. FLOGI is required */
9227 			lpfc_issue_init_vfi(vport);
9228 		} else {
9229 			/* FAN verified - skip FLOGI */
9230 			vport->fc_myDID = vport->fc_prevDID;
9231 			if (phba->sli_rev < LPFC_SLI_REV4)
9232 				lpfc_issue_fabric_reglogin(vport);
9233 			else {
9234 				lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9235 					"3138 Need register VFI: (x%x/%x)\n",
9236 					vport->fc_prevDID, vport->fc_myDID);
9237 				lpfc_issue_reg_vfi(vport);
9238 			}
9239 		}
9240 	}
9241 	return 0;
9242 }
9243 
9244 /**
9245  * lpfc_els_rcv_edc - Process an unsolicited EDC iocb
9246  * @vport: pointer to a host virtual N_Port data structure.
9247  * @cmdiocb: pointer to lpfc command iocb data structure.
9248  * @ndlp: pointer to a node-list data structure.
9249  *
9250  * Return code
9251  *   0 - Successfully processed echo iocb (currently always return 0)
9252  **/
9253 static int
lpfc_els_rcv_edc(struct lpfc_vport * vport,struct lpfc_iocbq * cmdiocb,struct lpfc_nodelist * ndlp)9254 lpfc_els_rcv_edc(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9255 		 struct lpfc_nodelist *ndlp)
9256 {
9257 	struct lpfc_hba  *phba = vport->phba;
9258 	struct fc_els_edc *edc_req;
9259 	struct fc_tlv_desc *tlv;
9260 	uint8_t *payload;
9261 	uint32_t *ptr, dtag;
9262 	const char *dtag_nm;
9263 	int desc_cnt = 0, bytes_remain;
9264 	struct fc_diag_lnkflt_desc *plnkflt;
9265 
9266 	payload = cmdiocb->cmd_dmabuf->virt;
9267 
9268 	edc_req = (struct fc_els_edc *)payload;
9269 	bytes_remain = be32_to_cpu(edc_req->desc_len);
9270 
9271 	ptr = (uint32_t *)payload;
9272 	lpfc_printf_vlog(vport, KERN_INFO,
9273 			 LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9274 			 "3319 Rcv EDC payload len %d: x%x x%x x%x\n",
9275 			 bytes_remain, be32_to_cpu(*ptr),
9276 			 be32_to_cpu(*(ptr + 1)), be32_to_cpu(*(ptr + 2)));
9277 
9278 	/* No signal support unless there is a congestion descriptor */
9279 	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
9280 	phba->cgn_sig_freq = 0;
9281 	phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
9282 
9283 	if (bytes_remain <= 0)
9284 		goto out;
9285 
9286 	tlv = edc_req->desc;
9287 
9288 	/*
9289 	 * cycle through EDC diagnostic descriptors to find the
9290 	 * congestion signaling capability descriptor
9291 	 */
9292 	while (bytes_remain) {
9293 		if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
9294 			lpfc_printf_log(phba, KERN_WARNING,
9295 					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9296 					"6464 Truncated TLV hdr on "
9297 					"Diagnostic descriptor[%d]\n",
9298 					desc_cnt);
9299 			goto out;
9300 		}
9301 
9302 		dtag = be32_to_cpu(tlv->desc_tag);
9303 		switch (dtag) {
9304 		case ELS_DTAG_LNK_FAULT_CAP:
9305 			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
9306 			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
9307 				sizeof(struct fc_diag_lnkflt_desc)) {
9308 				lpfc_printf_log(phba, KERN_WARNING,
9309 					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9310 					"6465 Truncated Link Fault Diagnostic "
9311 					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
9312 					desc_cnt, bytes_remain,
9313 					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
9314 					sizeof(struct fc_diag_lnkflt_desc));
9315 				goto out;
9316 			}
9317 			plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
9318 			lpfc_printf_log(phba, KERN_INFO,
9319 				LOG_ELS | LOG_LDS_EVENT,
9320 				"4626 Link Fault Desc Data: x%08x len x%x "
9321 				"da x%x dd x%x interval x%x\n",
9322 				be32_to_cpu(plnkflt->desc_tag),
9323 				be32_to_cpu(plnkflt->desc_len),
9324 				be32_to_cpu(
9325 					plnkflt->degrade_activate_threshold),
9326 				be32_to_cpu(
9327 					plnkflt->degrade_deactivate_threshold),
9328 				be32_to_cpu(plnkflt->fec_degrade_interval));
9329 			break;
9330 		case ELS_DTAG_CG_SIGNAL_CAP:
9331 			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
9332 			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
9333 				sizeof(struct fc_diag_cg_sig_desc)) {
9334 				lpfc_printf_log(
9335 					phba, KERN_WARNING, LOG_CGN_MGMT,
9336 					"6466 Truncated cgn signal Diagnostic "
9337 					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
9338 					desc_cnt, bytes_remain,
9339 					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
9340 					sizeof(struct fc_diag_cg_sig_desc));
9341 				goto out;
9342 			}
9343 
9344 			phba->cgn_reg_fpin = phba->cgn_init_reg_fpin;
9345 			phba->cgn_reg_signal = phba->cgn_init_reg_signal;
9346 
9347 			/* We start negotiation with lpfc_fabric_cgn_frequency.
9348 			 * When we process the EDC, we will settle on the
9349 			 * higher frequency.
9350 			 */
9351 			phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
9352 
9353 			lpfc_least_capable_settings(
9354 				phba, (struct fc_diag_cg_sig_desc *)tlv);
9355 			break;
9356 		default:
9357 			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
9358 			lpfc_printf_log(phba, KERN_WARNING,
9359 					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9360 					"6467 unknown Diagnostic "
9361 					"Descriptor[%d]: tag x%x (%s)\n",
9362 					desc_cnt, dtag, dtag_nm);
9363 		}
9364 		bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
9365 		tlv = fc_tlv_next_desc(tlv);
9366 		desc_cnt++;
9367 	}
9368 out:
9369 	/* Need to send back an ACC */
9370 	lpfc_issue_els_edc_rsp(vport, cmdiocb, ndlp);
9371 
9372 	lpfc_config_cgn_signal(phba);
9373 	return 0;
9374 }
9375 
9376 /**
9377  * lpfc_els_timeout - Handler funciton to the els timer
9378  * @t: timer context used to obtain the vport.
9379  *
9380  * This routine is invoked by the ELS timer after timeout. It posts the ELS
9381  * timer timeout event by setting the WORKER_ELS_TMO bit to the work port
9382  * event bitmap and then invokes the lpfc_worker_wake_up() routine to wake
9383  * up the worker thread. It is for the worker thread to invoke the routine
9384  * lpfc_els_timeout_handler() to work on the posted event WORKER_ELS_TMO.
9385  **/
9386 void
lpfc_els_timeout(struct timer_list * t)9387 lpfc_els_timeout(struct timer_list *t)
9388 {
9389 	struct lpfc_vport *vport = from_timer(vport, t, els_tmofunc);
9390 	struct lpfc_hba   *phba = vport->phba;
9391 	uint32_t tmo_posted;
9392 	unsigned long iflag;
9393 
9394 	spin_lock_irqsave(&vport->work_port_lock, iflag);
9395 	tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
9396 	if (!tmo_posted && !test_bit(FC_UNLOADING, &vport->load_flag))
9397 		vport->work_port_events |= WORKER_ELS_TMO;
9398 	spin_unlock_irqrestore(&vport->work_port_lock, iflag);
9399 
9400 	if (!tmo_posted && !test_bit(FC_UNLOADING, &vport->load_flag))
9401 		lpfc_worker_wake_up(phba);
9402 	return;
9403 }
9404 
9405 
9406 /**
9407  * lpfc_els_timeout_handler - Process an els timeout event
9408  * @vport: pointer to a virtual N_Port data structure.
9409  *
9410  * This routine is the actual handler function that processes an ELS timeout
9411  * event. It walks the ELS ring to get and abort all the IOCBs (except the
9412  * ABORT/CLOSE/FARP/FARPR/FDISC), which are associated with the @vport by
9413  * invoking the lpfc_sli_issue_abort_iotag() routine.
9414  **/
9415 void
lpfc_els_timeout_handler(struct lpfc_vport * vport)9416 lpfc_els_timeout_handler(struct lpfc_vport *vport)
9417 {
9418 	struct lpfc_hba  *phba = vport->phba;
9419 	struct lpfc_sli_ring *pring;
9420 	struct lpfc_iocbq *tmp_iocb, *piocb;
9421 	IOCB_t *cmd = NULL;
9422 	struct lpfc_dmabuf *pcmd;
9423 	uint32_t els_command = 0;
9424 	uint32_t timeout;
9425 	uint32_t remote_ID = 0xffffffff;
9426 	LIST_HEAD(abort_list);
9427 	u32 ulp_command = 0, ulp_context = 0, did = 0, iotag = 0;
9428 
9429 
9430 	timeout = (uint32_t)(phba->fc_ratov << 1);
9431 
9432 	pring = lpfc_phba_elsring(phba);
9433 	if (unlikely(!pring))
9434 		return;
9435 
9436 	if (test_bit(FC_UNLOADING, &phba->pport->load_flag))
9437 		return;
9438 
9439 	spin_lock_irq(&phba->hbalock);
9440 	if (phba->sli_rev == LPFC_SLI_REV4)
9441 		spin_lock(&pring->ring_lock);
9442 
9443 	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9444 		ulp_command = get_job_cmnd(phba, piocb);
9445 		ulp_context = get_job_ulpcontext(phba, piocb);
9446 		did = get_job_els_rsp64_did(phba, piocb);
9447 
9448 		if (phba->sli_rev == LPFC_SLI_REV4) {
9449 			iotag = get_wqe_reqtag(piocb);
9450 		} else {
9451 			cmd = &piocb->iocb;
9452 			iotag = cmd->ulpIoTag;
9453 		}
9454 
9455 		if ((piocb->cmd_flag & LPFC_IO_LIBDFC) != 0 ||
9456 		    ulp_command == CMD_ABORT_XRI_CX ||
9457 		    ulp_command == CMD_ABORT_XRI_CN ||
9458 		    ulp_command == CMD_CLOSE_XRI_CN)
9459 			continue;
9460 
9461 		if (piocb->vport != vport)
9462 			continue;
9463 
9464 		pcmd = piocb->cmd_dmabuf;
9465 		if (pcmd)
9466 			els_command = *(uint32_t *) (pcmd->virt);
9467 
9468 		if (els_command == ELS_CMD_FARP ||
9469 		    els_command == ELS_CMD_FARPR ||
9470 		    els_command == ELS_CMD_FDISC)
9471 			continue;
9472 
9473 		if (piocb->drvrTimeout > 0) {
9474 			if (piocb->drvrTimeout >= timeout)
9475 				piocb->drvrTimeout -= timeout;
9476 			else
9477 				piocb->drvrTimeout = 0;
9478 			continue;
9479 		}
9480 
9481 		remote_ID = 0xffffffff;
9482 		if (ulp_command != CMD_GEN_REQUEST64_CR) {
9483 			remote_ID = did;
9484 		} else {
9485 			struct lpfc_nodelist *ndlp;
9486 			ndlp = __lpfc_findnode_rpi(vport, ulp_context);
9487 			if (ndlp)
9488 				remote_ID = ndlp->nlp_DID;
9489 		}
9490 		list_add_tail(&piocb->dlist, &abort_list);
9491 	}
9492 	if (phba->sli_rev == LPFC_SLI_REV4)
9493 		spin_unlock(&pring->ring_lock);
9494 	spin_unlock_irq(&phba->hbalock);
9495 
9496 	list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9497 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9498 			 "0127 ELS timeout Data: x%x x%x x%x "
9499 			 "x%x\n", els_command,
9500 			 remote_ID, ulp_command, iotag);
9501 
9502 		spin_lock_irq(&phba->hbalock);
9503 		list_del_init(&piocb->dlist);
9504 		lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9505 		spin_unlock_irq(&phba->hbalock);
9506 	}
9507 
9508 	/* Make sure HBA is alive */
9509 	lpfc_issue_hb_tmo(phba);
9510 
9511 	if (!list_empty(&pring->txcmplq))
9512 		if (!test_bit(FC_UNLOADING, &phba->pport->load_flag))
9513 			mod_timer(&vport->els_tmofunc,
9514 				  jiffies + msecs_to_jiffies(1000 * timeout));
9515 }
9516 
9517 /**
9518  * lpfc_els_flush_cmd - Clean up the outstanding els commands to a vport
9519  * @vport: pointer to a host virtual N_Port data structure.
9520  *
9521  * This routine is used to clean up all the outstanding ELS commands on a
9522  * @vport. It first aborts the @vport by invoking lpfc_fabric_abort_vport()
9523  * routine. After that, it walks the ELS transmit queue to remove all the
9524  * IOCBs with the @vport other than the QUE_RING and ABORT/CLOSE IOCBs. For
9525  * the IOCBs with a non-NULL completion callback function, the callback
9526  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9527  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs with a NULL completion
9528  * callback function, the IOCB will simply be released. Finally, it walks
9529  * the ELS transmit completion queue to issue an abort IOCB to any transmit
9530  * completion queue IOCB that is associated with the @vport and is not
9531  * an IOCB from libdfc (i.e., the management plane IOCBs that are not
9532  * part of the discovery state machine) out to HBA by invoking the
9533  * lpfc_sli_issue_abort_iotag() routine. Note that this function issues the
9534  * abort IOCB to any transmit completion queueed IOCB, it does not guarantee
9535  * the IOCBs are aborted when this function returns.
9536  **/
9537 void
lpfc_els_flush_cmd(struct lpfc_vport * vport)9538 lpfc_els_flush_cmd(struct lpfc_vport *vport)
9539 {
9540 	LIST_HEAD(abort_list);
9541 	LIST_HEAD(cancel_list);
9542 	struct lpfc_hba  *phba = vport->phba;
9543 	struct lpfc_sli_ring *pring;
9544 	struct lpfc_iocbq *tmp_iocb, *piocb;
9545 	u32 ulp_command;
9546 	unsigned long iflags = 0;
9547 	bool mbx_tmo_err;
9548 
9549 	lpfc_fabric_abort_vport(vport);
9550 
9551 	/*
9552 	 * For SLI3, only the hbalock is required.  But SLI4 needs to coordinate
9553 	 * with the ring insert operation.  Because lpfc_sli_issue_abort_iotag
9554 	 * ultimately grabs the ring_lock, the driver must splice the list into
9555 	 * a working list and release the locks before calling the abort.
9556 	 */
9557 	spin_lock_irqsave(&phba->hbalock, iflags);
9558 	pring = lpfc_phba_elsring(phba);
9559 
9560 	/* Bail out if we've no ELS wq, like in PCI error recovery case. */
9561 	if (unlikely(!pring)) {
9562 		spin_unlock_irqrestore(&phba->hbalock, iflags);
9563 		return;
9564 	}
9565 
9566 	if (phba->sli_rev == LPFC_SLI_REV4)
9567 		spin_lock(&pring->ring_lock);
9568 
9569 	mbx_tmo_err = test_bit(MBX_TMO_ERR, &phba->bit_flags);
9570 	/* First we need to issue aborts to outstanding cmds on txcmpl */
9571 	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9572 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9573 				 "2243 iotag = 0x%x cmd_flag = 0x%x "
9574 				 "ulp_command = 0x%x this_vport %x "
9575 				 "sli_flag = 0x%x\n",
9576 				 piocb->iotag, piocb->cmd_flag,
9577 				 get_job_cmnd(phba, piocb),
9578 				 (piocb->vport == vport),
9579 				 phba->sli.sli_flag);
9580 
9581 		if (piocb->vport != vport)
9582 			continue;
9583 
9584 		if ((phba->sli.sli_flag & LPFC_SLI_ACTIVE) && !mbx_tmo_err) {
9585 			if (piocb->cmd_flag & LPFC_IO_LIBDFC)
9586 				continue;
9587 			if (piocb->cmd_flag & LPFC_DRIVER_ABORTED)
9588 				continue;
9589 		}
9590 
9591 		/* On the ELS ring we can have ELS_REQUESTs, ELS_RSPs,
9592 		 * or GEN_REQUESTs waiting for a CQE response.
9593 		 */
9594 		ulp_command = get_job_cmnd(phba, piocb);
9595 		if (ulp_command == CMD_ELS_REQUEST64_WQE ||
9596 		    ulp_command == CMD_XMIT_ELS_RSP64_WQE) {
9597 			list_add_tail(&piocb->dlist, &abort_list);
9598 
9599 			/* If the link is down when flushing ELS commands
9600 			 * the firmware will not complete them till after
9601 			 * the link comes back up. This may confuse
9602 			 * discovery for the new link up, so we need to
9603 			 * change the compl routine to just clean up the iocb
9604 			 * and avoid any retry logic.
9605 			 */
9606 			if (phba->link_state == LPFC_LINK_DOWN)
9607 				piocb->cmd_cmpl = lpfc_cmpl_els_link_down;
9608 		} else if (ulp_command == CMD_GEN_REQUEST64_CR ||
9609 			   mbx_tmo_err)
9610 			list_add_tail(&piocb->dlist, &abort_list);
9611 	}
9612 
9613 	if (phba->sli_rev == LPFC_SLI_REV4)
9614 		spin_unlock(&pring->ring_lock);
9615 	spin_unlock_irqrestore(&phba->hbalock, iflags);
9616 
9617 	/* Abort each txcmpl iocb on aborted list and remove the dlist links. */
9618 	list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9619 		spin_lock_irqsave(&phba->hbalock, iflags);
9620 		list_del_init(&piocb->dlist);
9621 		if (mbx_tmo_err || !(phba->sli.sli_flag & LPFC_SLI_ACTIVE))
9622 			list_move_tail(&piocb->list, &cancel_list);
9623 		else
9624 			lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9625 
9626 		spin_unlock_irqrestore(&phba->hbalock, iflags);
9627 	}
9628 	if (!list_empty(&cancel_list))
9629 		lpfc_sli_cancel_iocbs(phba, &cancel_list, IOSTAT_LOCAL_REJECT,
9630 				      IOERR_SLI_ABORTED);
9631 	else
9632 		/* Make sure HBA is alive */
9633 		lpfc_issue_hb_tmo(phba);
9634 
9635 	if (!list_empty(&abort_list))
9636 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9637 				 "3387 abort list for txq not empty\n");
9638 	INIT_LIST_HEAD(&abort_list);
9639 
9640 	spin_lock_irqsave(&phba->hbalock, iflags);
9641 	if (phba->sli_rev == LPFC_SLI_REV4)
9642 		spin_lock(&pring->ring_lock);
9643 
9644 	/* No need to abort the txq list,
9645 	 * just queue them up for lpfc_sli_cancel_iocbs
9646 	 */
9647 	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
9648 		ulp_command = get_job_cmnd(phba, piocb);
9649 
9650 		if (piocb->cmd_flag & LPFC_IO_LIBDFC)
9651 			continue;
9652 
9653 		/* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
9654 		if (ulp_command == CMD_QUE_RING_BUF_CN ||
9655 		    ulp_command == CMD_QUE_RING_BUF64_CN ||
9656 		    ulp_command == CMD_CLOSE_XRI_CN ||
9657 		    ulp_command == CMD_ABORT_XRI_CN ||
9658 		    ulp_command == CMD_ABORT_XRI_CX)
9659 			continue;
9660 
9661 		if (piocb->vport != vport)
9662 			continue;
9663 
9664 		list_del_init(&piocb->list);
9665 		list_add_tail(&piocb->list, &abort_list);
9666 	}
9667 
9668 	/* The same holds true for any FLOGI/FDISC on the fabric_iocb_list */
9669 	if (vport == phba->pport) {
9670 		list_for_each_entry_safe(piocb, tmp_iocb,
9671 					 &phba->fabric_iocb_list, list) {
9672 			list_del_init(&piocb->list);
9673 			list_add_tail(&piocb->list, &abort_list);
9674 		}
9675 	}
9676 
9677 	if (phba->sli_rev == LPFC_SLI_REV4)
9678 		spin_unlock(&pring->ring_lock);
9679 	spin_unlock_irqrestore(&phba->hbalock, iflags);
9680 
9681 	/* Cancel all the IOCBs from the completions list */
9682 	lpfc_sli_cancel_iocbs(phba, &abort_list,
9683 			      IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
9684 
9685 	return;
9686 }
9687 
9688 /**
9689  * lpfc_els_flush_all_cmd - Clean up all the outstanding els commands to a HBA
9690  * @phba: pointer to lpfc hba data structure.
9691  *
9692  * This routine is used to clean up all the outstanding ELS commands on a
9693  * @phba. It first aborts the @phba by invoking the lpfc_fabric_abort_hba()
9694  * routine. After that, it walks the ELS transmit queue to remove all the
9695  * IOCBs to the @phba other than the QUE_RING and ABORT/CLOSE IOCBs. For
9696  * the IOCBs with the completion callback function associated, the callback
9697  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9698  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs without the completion
9699  * callback function associated, the IOCB will simply be released. Finally,
9700  * it walks the ELS transmit completion queue to issue an abort IOCB to any
9701  * transmit completion queue IOCB that is not an IOCB from libdfc (i.e., the
9702  * management plane IOCBs that are not part of the discovery state machine)
9703  * out to HBA by invoking the lpfc_sli_issue_abort_iotag() routine.
9704  **/
9705 void
lpfc_els_flush_all_cmd(struct lpfc_hba * phba)9706 lpfc_els_flush_all_cmd(struct lpfc_hba  *phba)
9707 {
9708 	struct lpfc_vport *vport;
9709 
9710 	spin_lock_irq(&phba->port_list_lock);
9711 	list_for_each_entry(vport, &phba->port_list, listentry)
9712 		lpfc_els_flush_cmd(vport);
9713 	spin_unlock_irq(&phba->port_list_lock);
9714 
9715 	return;
9716 }
9717 
9718 /**
9719  * lpfc_send_els_failure_event - Posts an ELS command failure event
9720  * @phba: Pointer to hba context object.
9721  * @cmdiocbp: Pointer to command iocb which reported error.
9722  * @rspiocbp: Pointer to response iocb which reported error.
9723  *
9724  * This function sends an event when there is an ELS command
9725  * failure.
9726  **/
9727 void
lpfc_send_els_failure_event(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocbp,struct lpfc_iocbq * rspiocbp)9728 lpfc_send_els_failure_event(struct lpfc_hba *phba,
9729 			struct lpfc_iocbq *cmdiocbp,
9730 			struct lpfc_iocbq *rspiocbp)
9731 {
9732 	struct lpfc_vport *vport = cmdiocbp->vport;
9733 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9734 	struct lpfc_lsrjt_event lsrjt_event;
9735 	struct lpfc_fabric_event_header fabric_event;
9736 	struct ls_rjt stat;
9737 	struct lpfc_nodelist *ndlp;
9738 	uint32_t *pcmd;
9739 	u32 ulp_status, ulp_word4;
9740 
9741 	ndlp = cmdiocbp->ndlp;
9742 	if (!ndlp)
9743 		return;
9744 
9745 	ulp_status = get_job_ulpstatus(phba, rspiocbp);
9746 	ulp_word4 = get_job_word4(phba, rspiocbp);
9747 
9748 	if (ulp_status == IOSTAT_LS_RJT) {
9749 		lsrjt_event.header.event_type = FC_REG_ELS_EVENT;
9750 		lsrjt_event.header.subcategory = LPFC_EVENT_LSRJT_RCV;
9751 		memcpy(lsrjt_event.header.wwpn, &ndlp->nlp_portname,
9752 			sizeof(struct lpfc_name));
9753 		memcpy(lsrjt_event.header.wwnn, &ndlp->nlp_nodename,
9754 			sizeof(struct lpfc_name));
9755 		pcmd = (uint32_t *)cmdiocbp->cmd_dmabuf->virt;
9756 		lsrjt_event.command = (pcmd != NULL) ? *pcmd : 0;
9757 		stat.un.ls_rjt_error_be = cpu_to_be32(ulp_word4);
9758 		lsrjt_event.reason_code = stat.un.b.lsRjtRsnCode;
9759 		lsrjt_event.explanation = stat.un.b.lsRjtRsnCodeExp;
9760 		fc_host_post_vendor_event(shost,
9761 			fc_get_event_number(),
9762 			sizeof(lsrjt_event),
9763 			(char *)&lsrjt_event,
9764 			LPFC_NL_VENDOR_ID);
9765 		return;
9766 	}
9767 	if (ulp_status == IOSTAT_NPORT_BSY ||
9768 	    ulp_status == IOSTAT_FABRIC_BSY) {
9769 		fabric_event.event_type = FC_REG_FABRIC_EVENT;
9770 		if (ulp_status == IOSTAT_NPORT_BSY)
9771 			fabric_event.subcategory = LPFC_EVENT_PORT_BUSY;
9772 		else
9773 			fabric_event.subcategory = LPFC_EVENT_FABRIC_BUSY;
9774 		memcpy(fabric_event.wwpn, &ndlp->nlp_portname,
9775 			sizeof(struct lpfc_name));
9776 		memcpy(fabric_event.wwnn, &ndlp->nlp_nodename,
9777 			sizeof(struct lpfc_name));
9778 		fc_host_post_vendor_event(shost,
9779 			fc_get_event_number(),
9780 			sizeof(fabric_event),
9781 			(char *)&fabric_event,
9782 			LPFC_NL_VENDOR_ID);
9783 		return;
9784 	}
9785 
9786 }
9787 
9788 /**
9789  * lpfc_send_els_event - Posts unsolicited els event
9790  * @vport: Pointer to vport object.
9791  * @ndlp: Pointer FC node object.
9792  * @payload: ELS command code type.
9793  *
9794  * This function posts an event when there is an incoming
9795  * unsolicited ELS command.
9796  **/
9797 static void
lpfc_send_els_event(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,uint32_t * payload)9798 lpfc_send_els_event(struct lpfc_vport *vport,
9799 		    struct lpfc_nodelist *ndlp,
9800 		    uint32_t *payload)
9801 {
9802 	struct lpfc_els_event_header *els_data = NULL;
9803 	struct lpfc_logo_event *logo_data = NULL;
9804 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9805 
9806 	if (*payload == ELS_CMD_LOGO) {
9807 		logo_data = kmalloc(sizeof(struct lpfc_logo_event), GFP_KERNEL);
9808 		if (!logo_data) {
9809 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9810 				"0148 Failed to allocate memory "
9811 				"for LOGO event\n");
9812 			return;
9813 		}
9814 		els_data = &logo_data->header;
9815 	} else {
9816 		els_data = kmalloc(sizeof(struct lpfc_els_event_header),
9817 			GFP_KERNEL);
9818 		if (!els_data) {
9819 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9820 				"0149 Failed to allocate memory "
9821 				"for ELS event\n");
9822 			return;
9823 		}
9824 	}
9825 	els_data->event_type = FC_REG_ELS_EVENT;
9826 	switch (*payload) {
9827 	case ELS_CMD_PLOGI:
9828 		els_data->subcategory = LPFC_EVENT_PLOGI_RCV;
9829 		break;
9830 	case ELS_CMD_PRLO:
9831 		els_data->subcategory = LPFC_EVENT_PRLO_RCV;
9832 		break;
9833 	case ELS_CMD_ADISC:
9834 		els_data->subcategory = LPFC_EVENT_ADISC_RCV;
9835 		break;
9836 	case ELS_CMD_LOGO:
9837 		els_data->subcategory = LPFC_EVENT_LOGO_RCV;
9838 		/* Copy the WWPN in the LOGO payload */
9839 		memcpy(logo_data->logo_wwpn, &payload[2],
9840 			sizeof(struct lpfc_name));
9841 		break;
9842 	default:
9843 		kfree(els_data);
9844 		return;
9845 	}
9846 	memcpy(els_data->wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name));
9847 	memcpy(els_data->wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name));
9848 	if (*payload == ELS_CMD_LOGO) {
9849 		fc_host_post_vendor_event(shost,
9850 			fc_get_event_number(),
9851 			sizeof(struct lpfc_logo_event),
9852 			(char *)logo_data,
9853 			LPFC_NL_VENDOR_ID);
9854 		kfree(logo_data);
9855 	} else {
9856 		fc_host_post_vendor_event(shost,
9857 			fc_get_event_number(),
9858 			sizeof(struct lpfc_els_event_header),
9859 			(char *)els_data,
9860 			LPFC_NL_VENDOR_ID);
9861 		kfree(els_data);
9862 	}
9863 
9864 	return;
9865 }
9866 
9867 
9868 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_li_event_nm, fc_fpin_li_event_types,
9869 			FC_FPIN_LI_EVT_TYPES_INIT);
9870 
9871 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_deli_event_nm, fc_fpin_deli_event_types,
9872 			FC_FPIN_DELI_EVT_TYPES_INIT);
9873 
9874 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_event_nm, fc_fpin_congn_event_types,
9875 			FC_FPIN_CONGN_EVT_TYPES_INIT);
9876 
9877 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_severity_nm,
9878 			fc_fpin_congn_severity_types,
9879 			FC_FPIN_CONGN_SEVERITY_INIT);
9880 
9881 
9882 /**
9883  * lpfc_display_fpin_wwpn - Display WWPNs accessible by the attached port
9884  * @phba: Pointer to phba object.
9885  * @wwnlist: Pointer to list of WWPNs in FPIN payload
9886  * @cnt: count of WWPNs in FPIN payload
9887  *
9888  * This routine is called by LI and PC descriptors.
9889  * Limit the number of WWPNs displayed to 6 log messages, 6 per log message
9890  */
9891 static void
lpfc_display_fpin_wwpn(struct lpfc_hba * phba,__be64 * wwnlist,u32 cnt)9892 lpfc_display_fpin_wwpn(struct lpfc_hba *phba, __be64 *wwnlist, u32 cnt)
9893 {
9894 	char buf[LPFC_FPIN_WWPN_LINE_SZ];
9895 	__be64 wwn;
9896 	u64 wwpn;
9897 	int i, len;
9898 	int line = 0;
9899 	int wcnt = 0;
9900 	bool endit = false;
9901 
9902 	len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ, "Accessible WWPNs:");
9903 	for (i = 0; i < cnt; i++) {
9904 		/* Are we on the last WWPN */
9905 		if (i == (cnt - 1))
9906 			endit = true;
9907 
9908 		/* Extract the next WWPN from the payload */
9909 		wwn = *wwnlist++;
9910 		wwpn = be64_to_cpu(wwn);
9911 		len += scnprintf(buf + len, LPFC_FPIN_WWPN_LINE_SZ - len,
9912 				 " %016llx", wwpn);
9913 
9914 		/* Log a message if we are on the last WWPN
9915 		 * or if we hit the max allowed per message.
9916 		 */
9917 		wcnt++;
9918 		if (wcnt == LPFC_FPIN_WWPN_LINE_CNT || endit) {
9919 			buf[len] = 0;
9920 			lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9921 					"4686 %s\n", buf);
9922 
9923 			/* Check if we reached the last WWPN */
9924 			if (endit)
9925 				return;
9926 
9927 			/* Limit the number of log message displayed per FPIN */
9928 			line++;
9929 			if (line == LPFC_FPIN_WWPN_NUM_LINE) {
9930 				lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9931 						"4687 %d WWPNs Truncated\n",
9932 						cnt - i - 1);
9933 				return;
9934 			}
9935 
9936 			/* Start over with next log message */
9937 			wcnt = 0;
9938 			len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ,
9939 					"Additional WWPNs:");
9940 		}
9941 	}
9942 }
9943 
9944 /**
9945  * lpfc_els_rcv_fpin_li - Process an FPIN Link Integrity Event.
9946  * @phba: Pointer to phba object.
9947  * @tlv:  Pointer to the Link Integrity Notification Descriptor.
9948  *
9949  * This function processes a Link Integrity FPIN event by logging a message.
9950  **/
9951 static void
lpfc_els_rcv_fpin_li(struct lpfc_hba * phba,struct fc_tlv_desc * tlv)9952 lpfc_els_rcv_fpin_li(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9953 {
9954 	struct fc_fn_li_desc *li = (struct fc_fn_li_desc *)tlv;
9955 	const char *li_evt_str;
9956 	u32 li_evt, cnt;
9957 
9958 	li_evt = be16_to_cpu(li->event_type);
9959 	li_evt_str = lpfc_get_fpin_li_event_nm(li_evt);
9960 	cnt = be32_to_cpu(li->pname_count);
9961 
9962 	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9963 			"4680 FPIN Link Integrity %s (x%x) "
9964 			"Detecting PN x%016llx Attached PN x%016llx "
9965 			"Duration %d mSecs Count %d Port Cnt %d\n",
9966 			li_evt_str, li_evt,
9967 			be64_to_cpu(li->detecting_wwpn),
9968 			be64_to_cpu(li->attached_wwpn),
9969 			be32_to_cpu(li->event_threshold),
9970 			be32_to_cpu(li->event_count), cnt);
9971 
9972 	lpfc_display_fpin_wwpn(phba, (__be64 *)&li->pname_list, cnt);
9973 }
9974 
9975 /**
9976  * lpfc_els_rcv_fpin_del - Process an FPIN Delivery Event.
9977  * @phba: Pointer to hba object.
9978  * @tlv:  Pointer to the Delivery Notification Descriptor TLV
9979  *
9980  * This function processes a Delivery FPIN event by logging a message.
9981  **/
9982 static void
lpfc_els_rcv_fpin_del(struct lpfc_hba * phba,struct fc_tlv_desc * tlv)9983 lpfc_els_rcv_fpin_del(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9984 {
9985 	struct fc_fn_deli_desc *del = (struct fc_fn_deli_desc *)tlv;
9986 	const char *del_rsn_str;
9987 	u32 del_rsn;
9988 	__be32 *frame;
9989 
9990 	del_rsn = be16_to_cpu(del->deli_reason_code);
9991 	del_rsn_str = lpfc_get_fpin_deli_event_nm(del_rsn);
9992 
9993 	/* Skip over desc_tag/desc_len header to payload */
9994 	frame = (__be32 *)(del + 1);
9995 
9996 	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9997 			"4681 FPIN Delivery %s (x%x) "
9998 			"Detecting PN x%016llx Attached PN x%016llx "
9999 			"DiscHdr0  x%08x "
10000 			"DiscHdr1 x%08x DiscHdr2 x%08x DiscHdr3 x%08x "
10001 			"DiscHdr4 x%08x DiscHdr5 x%08x\n",
10002 			del_rsn_str, del_rsn,
10003 			be64_to_cpu(del->detecting_wwpn),
10004 			be64_to_cpu(del->attached_wwpn),
10005 			be32_to_cpu(frame[0]),
10006 			be32_to_cpu(frame[1]),
10007 			be32_to_cpu(frame[2]),
10008 			be32_to_cpu(frame[3]),
10009 			be32_to_cpu(frame[4]),
10010 			be32_to_cpu(frame[5]));
10011 }
10012 
10013 /**
10014  * lpfc_els_rcv_fpin_peer_cgn - Process a FPIN Peer Congestion Event.
10015  * @phba: Pointer to hba object.
10016  * @tlv:  Pointer to the Peer Congestion Notification Descriptor TLV
10017  *
10018  * This function processes a Peer Congestion FPIN event by logging a message.
10019  **/
10020 static void
lpfc_els_rcv_fpin_peer_cgn(struct lpfc_hba * phba,struct fc_tlv_desc * tlv)10021 lpfc_els_rcv_fpin_peer_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10022 {
10023 	struct fc_fn_peer_congn_desc *pc = (struct fc_fn_peer_congn_desc *)tlv;
10024 	const char *pc_evt_str;
10025 	u32 pc_evt, cnt;
10026 
10027 	pc_evt = be16_to_cpu(pc->event_type);
10028 	pc_evt_str = lpfc_get_fpin_congn_event_nm(pc_evt);
10029 	cnt = be32_to_cpu(pc->pname_count);
10030 
10031 	/* Capture FPIN frequency */
10032 	phba->cgn_fpin_frequency = be32_to_cpu(pc->event_period);
10033 
10034 	lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT | LOG_ELS,
10035 			"4684 FPIN Peer Congestion %s (x%x) "
10036 			"Duration %d mSecs "
10037 			"Detecting PN x%016llx Attached PN x%016llx "
10038 			"Impacted Port Cnt %d\n",
10039 			pc_evt_str, pc_evt,
10040 			be32_to_cpu(pc->event_period),
10041 			be64_to_cpu(pc->detecting_wwpn),
10042 			be64_to_cpu(pc->attached_wwpn),
10043 			cnt);
10044 
10045 	lpfc_display_fpin_wwpn(phba, (__be64 *)&pc->pname_list, cnt);
10046 }
10047 
10048 /**
10049  * lpfc_els_rcv_fpin_cgn - Process an FPIN Congestion notification
10050  * @phba: Pointer to hba object.
10051  * @tlv:  Pointer to the Congestion Notification Descriptor TLV
10052  *
10053  * This function processes an FPIN Congestion Notifiction.  The notification
10054  * could be an Alarm or Warning.  This routine feeds that data into driver's
10055  * running congestion algorithm. It also processes the FPIN by
10056  * logging a message. It returns 1 to indicate deliver this message
10057  * to the upper layer or 0 to indicate don't deliver it.
10058  **/
10059 static int
lpfc_els_rcv_fpin_cgn(struct lpfc_hba * phba,struct fc_tlv_desc * tlv)10060 lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10061 {
10062 	struct lpfc_cgn_info *cp;
10063 	struct fc_fn_congn_desc *cgn = (struct fc_fn_congn_desc *)tlv;
10064 	const char *cgn_evt_str;
10065 	u32 cgn_evt;
10066 	const char *cgn_sev_str;
10067 	u32 cgn_sev;
10068 	uint16_t value;
10069 	u32 crc;
10070 	bool nm_log = false;
10071 	int rc = 1;
10072 
10073 	cgn_evt = be16_to_cpu(cgn->event_type);
10074 	cgn_evt_str = lpfc_get_fpin_congn_event_nm(cgn_evt);
10075 	cgn_sev = cgn->severity;
10076 	cgn_sev_str = lpfc_get_fpin_congn_severity_nm(cgn_sev);
10077 
10078 	/* The driver only takes action on a Credit Stall or Oversubscription
10079 	 * event type to engage the IO algorithm.  The driver prints an
10080 	 * unmaskable message only for Lost Credit and Credit Stall.
10081 	 * TODO: Still need to have definition of host action on clear,
10082 	 *       lost credit and device specific event types.
10083 	 */
10084 	switch (cgn_evt) {
10085 	case FPIN_CONGN_LOST_CREDIT:
10086 		nm_log = true;
10087 		break;
10088 	case FPIN_CONGN_CREDIT_STALL:
10089 		nm_log = true;
10090 		fallthrough;
10091 	case FPIN_CONGN_OVERSUBSCRIPTION:
10092 		if (cgn_evt == FPIN_CONGN_OVERSUBSCRIPTION)
10093 			nm_log = false;
10094 		switch (cgn_sev) {
10095 		case FPIN_CONGN_SEVERITY_ERROR:
10096 			/* Take action here for an Alarm event */
10097 			if (phba->cmf_active_mode != LPFC_CFG_OFF) {
10098 				if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_ALARM) {
10099 					/* Track of alarm cnt for SYNC_WQE */
10100 					atomic_inc(&phba->cgn_sync_alarm_cnt);
10101 				}
10102 				/* Track alarm cnt for cgn_info regardless
10103 				 * of whether CMF is configured for Signals
10104 				 * or FPINs.
10105 				 */
10106 				atomic_inc(&phba->cgn_fabric_alarm_cnt);
10107 				goto cleanup;
10108 			}
10109 			break;
10110 		case FPIN_CONGN_SEVERITY_WARNING:
10111 			/* Take action here for a Warning event */
10112 			if (phba->cmf_active_mode != LPFC_CFG_OFF) {
10113 				if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_WARN) {
10114 					/* Track of warning cnt for SYNC_WQE */
10115 					atomic_inc(&phba->cgn_sync_warn_cnt);
10116 				}
10117 				/* Track warning cnt and freq for cgn_info
10118 				 * regardless of whether CMF is configured for
10119 				 * Signals or FPINs.
10120 				 */
10121 				atomic_inc(&phba->cgn_fabric_warn_cnt);
10122 cleanup:
10123 				/* Save frequency in ms */
10124 				phba->cgn_fpin_frequency =
10125 					be32_to_cpu(cgn->event_period);
10126 				value = phba->cgn_fpin_frequency;
10127 				if (phba->cgn_i) {
10128 					cp = (struct lpfc_cgn_info *)
10129 						phba->cgn_i->virt;
10130 					cp->cgn_alarm_freq =
10131 						cpu_to_le16(value);
10132 					cp->cgn_warn_freq =
10133 						cpu_to_le16(value);
10134 					crc = lpfc_cgn_calc_crc32
10135 						(cp,
10136 						LPFC_CGN_INFO_SZ,
10137 						LPFC_CGN_CRC32_SEED);
10138 					cp->cgn_info_crc = cpu_to_le32(crc);
10139 				}
10140 
10141 				/* Don't deliver to upper layer since
10142 				 * driver took action on this tlv.
10143 				 */
10144 				rc = 0;
10145 			}
10146 			break;
10147 		}
10148 		break;
10149 	}
10150 
10151 	/* Change the log level to unmaskable for the following event types. */
10152 	lpfc_printf_log(phba, (nm_log ? KERN_WARNING : KERN_INFO),
10153 			LOG_CGN_MGMT | LOG_ELS,
10154 			"4683 FPIN CONGESTION %s type %s (x%x) Event "
10155 			"Duration %d mSecs\n",
10156 			cgn_sev_str, cgn_evt_str, cgn_evt,
10157 			be32_to_cpu(cgn->event_period));
10158 	return rc;
10159 }
10160 
10161 void
lpfc_els_rcv_fpin(struct lpfc_vport * vport,void * p,u32 fpin_length)10162 lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
10163 {
10164 	struct lpfc_hba *phba = vport->phba;
10165 	struct fc_els_fpin *fpin = (struct fc_els_fpin *)p;
10166 	struct fc_tlv_desc *tlv, *first_tlv, *current_tlv;
10167 	const char *dtag_nm;
10168 	int desc_cnt = 0, bytes_remain, cnt;
10169 	u32 dtag, deliver = 0;
10170 	int len;
10171 
10172 	/* FPINs handled only if we are in the right discovery state */
10173 	if (vport->port_state < LPFC_DISC_AUTH)
10174 		return;
10175 
10176 	/* make sure there is the full fpin header */
10177 	if (fpin_length < sizeof(struct fc_els_fpin))
10178 		return;
10179 
10180 	/* Sanity check descriptor length. The desc_len value does not
10181 	 * include space for the ELS command and the desc_len fields.
10182 	 */
10183 	len = be32_to_cpu(fpin->desc_len);
10184 	if (fpin_length < len + sizeof(struct fc_els_fpin)) {
10185 		lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10186 				"4671 Bad ELS FPIN length %d: %d\n",
10187 				len, fpin_length);
10188 		return;
10189 	}
10190 
10191 	tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
10192 	first_tlv = tlv;
10193 	bytes_remain = fpin_length - offsetof(struct fc_els_fpin, fpin_desc);
10194 	bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
10195 
10196 	/* process each descriptor separately */
10197 	while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
10198 	       bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
10199 		dtag = be32_to_cpu(tlv->desc_tag);
10200 		switch (dtag) {
10201 		case ELS_DTAG_LNK_INTEGRITY:
10202 			lpfc_els_rcv_fpin_li(phba, tlv);
10203 			deliver = 1;
10204 			break;
10205 		case ELS_DTAG_DELIVERY:
10206 			lpfc_els_rcv_fpin_del(phba, tlv);
10207 			deliver = 1;
10208 			break;
10209 		case ELS_DTAG_PEER_CONGEST:
10210 			lpfc_els_rcv_fpin_peer_cgn(phba, tlv);
10211 			deliver = 1;
10212 			break;
10213 		case ELS_DTAG_CONGESTION:
10214 			deliver = lpfc_els_rcv_fpin_cgn(phba, tlv);
10215 			break;
10216 		default:
10217 			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
10218 			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10219 					"4678 unknown FPIN descriptor[%d]: "
10220 					"tag x%x (%s)\n",
10221 					desc_cnt, dtag, dtag_nm);
10222 
10223 			/* If descriptor is bad, drop the rest of the data */
10224 			return;
10225 		}
10226 		lpfc_cgn_update_stat(phba, dtag);
10227 		cnt = be32_to_cpu(tlv->desc_len);
10228 
10229 		/* Sanity check descriptor length. The desc_len value does not
10230 		 * include space for the desc_tag and the desc_len fields.
10231 		 */
10232 		len -= (cnt + sizeof(struct fc_tlv_desc));
10233 		if (len < 0) {
10234 			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
10235 			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10236 					"4672 Bad FPIN descriptor TLV length "
10237 					"%d: %d %d %s\n",
10238 					cnt, len, fpin_length, dtag_nm);
10239 			return;
10240 		}
10241 
10242 		current_tlv = tlv;
10243 		bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
10244 		tlv = fc_tlv_next_desc(tlv);
10245 
10246 		/* Format payload such that the FPIN delivered to the
10247 		 * upper layer is a single descriptor FPIN.
10248 		 */
10249 		if (desc_cnt)
10250 			memcpy(first_tlv, current_tlv,
10251 			       (cnt + sizeof(struct fc_els_fpin)));
10252 
10253 		/* Adjust the length so that it only reflects a
10254 		 * single descriptor FPIN.
10255 		 */
10256 		fpin_length = cnt + sizeof(struct fc_els_fpin);
10257 		fpin->desc_len = cpu_to_be32(fpin_length);
10258 		fpin_length += sizeof(struct fc_els_fpin); /* the entire FPIN */
10259 
10260 		/* Send every descriptor individually to the upper layer */
10261 		if (deliver)
10262 			fc_host_fpin_rcv(lpfc_shost_from_vport(vport),
10263 					 fpin_length, (char *)fpin, 0);
10264 		desc_cnt++;
10265 	}
10266 }
10267 
10268 /**
10269  * lpfc_els_unsol_buffer - Process an unsolicited event data buffer
10270  * @phba: pointer to lpfc hba data structure.
10271  * @pring: pointer to a SLI ring.
10272  * @vport: pointer to a host virtual N_Port data structure.
10273  * @elsiocb: pointer to lpfc els command iocb data structure.
10274  *
10275  * This routine is used for processing the IOCB associated with a unsolicited
10276  * event. It first determines whether there is an existing ndlp that matches
10277  * the DID from the unsolicited IOCB. If not, it will create a new one with
10278  * the DID from the unsolicited IOCB. The ELS command from the unsolicited
10279  * IOCB is then used to invoke the proper routine and to set up proper state
10280  * of the discovery state machine.
10281  **/
10282 static void
lpfc_els_unsol_buffer(struct lpfc_hba * phba,struct lpfc_sli_ring * pring,struct lpfc_vport * vport,struct lpfc_iocbq * elsiocb)10283 lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10284 		      struct lpfc_vport *vport, struct lpfc_iocbq *elsiocb)
10285 {
10286 	struct lpfc_nodelist *ndlp;
10287 	struct ls_rjt stat;
10288 	u32 *payload, payload_len;
10289 	u32 cmd = 0, did = 0, newnode, status = 0;
10290 	uint8_t rjt_exp, rjt_err = 0, init_link = 0;
10291 	struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
10292 	LPFC_MBOXQ_t *mbox;
10293 
10294 	if (!vport || !elsiocb->cmd_dmabuf)
10295 		goto dropit;
10296 
10297 	newnode = 0;
10298 	wcqe_cmpl = &elsiocb->wcqe_cmpl;
10299 	payload = elsiocb->cmd_dmabuf->virt;
10300 	if (phba->sli_rev == LPFC_SLI_REV4)
10301 		payload_len = wcqe_cmpl->total_data_placed;
10302 	else
10303 		payload_len = elsiocb->iocb.unsli3.rcvsli3.acc_len;
10304 	status = get_job_ulpstatus(phba, elsiocb);
10305 	cmd = *payload;
10306 	if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
10307 		lpfc_sli3_post_buffer(phba, pring, 1);
10308 
10309 	did = get_job_els_rsp64_did(phba, elsiocb);
10310 	if (status) {
10311 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10312 			"RCV Unsol ELS:  status:x%x/x%x did:x%x",
10313 			status, get_job_word4(phba, elsiocb), did);
10314 		goto dropit;
10315 	}
10316 
10317 	/* Check to see if link went down during discovery */
10318 	if (lpfc_els_chk_latt(vport))
10319 		goto dropit;
10320 
10321 	/* Ignore traffic received during vport shutdown. */
10322 	if (test_bit(FC_UNLOADING, &vport->load_flag))
10323 		goto dropit;
10324 
10325 	/* If NPort discovery is delayed drop incoming ELS */
10326 	if (test_bit(FC_DISC_DELAYED, &vport->fc_flag) &&
10327 	    cmd != ELS_CMD_PLOGI)
10328 		goto dropit;
10329 
10330 	ndlp = lpfc_findnode_did(vport, did);
10331 	if (!ndlp) {
10332 		/* Cannot find existing Fabric ndlp, so allocate a new one */
10333 		ndlp = lpfc_nlp_init(vport, did);
10334 		if (!ndlp)
10335 			goto dropit;
10336 		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
10337 		newnode = 1;
10338 		if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
10339 			ndlp->nlp_type |= NLP_FABRIC;
10340 	} else if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
10341 		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
10342 		newnode = 1;
10343 	}
10344 
10345 	phba->fc_stat.elsRcvFrame++;
10346 
10347 	/*
10348 	 * Do not process any unsolicited ELS commands
10349 	 * if the ndlp is in DEV_LOSS
10350 	 */
10351 	if (test_bit(NLP_IN_DEV_LOSS, &ndlp->nlp_flag)) {
10352 		if (newnode)
10353 			lpfc_nlp_put(ndlp);
10354 		goto dropit;
10355 	}
10356 
10357 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
10358 	if (!elsiocb->ndlp)
10359 		goto dropit;
10360 	elsiocb->vport = vport;
10361 
10362 	if ((cmd & ELS_CMD_MASK) == ELS_CMD_RSCN) {
10363 		cmd &= ELS_CMD_MASK;
10364 	}
10365 	/* ELS command <elsCmd> received from NPORT <did> */
10366 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10367 			 "0112 ELS command x%x received from NPORT x%x "
10368 			 "refcnt %d Data: x%x x%lx x%x x%x\n",
10369 			 cmd, did, kref_read(&ndlp->kref), vport->port_state,
10370 			 vport->fc_flag, vport->fc_myDID, vport->fc_prevDID);
10371 
10372 	/* reject till our FLOGI completes or PLOGI assigned DID via PT2PT */
10373 	if ((vport->port_state < LPFC_FABRIC_CFG_LINK) &&
10374 	    (cmd != ELS_CMD_FLOGI) &&
10375 	    !((cmd == ELS_CMD_PLOGI) && test_bit(FC_PT2PT, &vport->fc_flag))) {
10376 		rjt_err = LSRJT_LOGICAL_BSY;
10377 		rjt_exp = LSEXP_NOTHING_MORE;
10378 		goto lsrjt;
10379 	}
10380 
10381 	switch (cmd) {
10382 	case ELS_CMD_PLOGI:
10383 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10384 			"RCV PLOGI:       did:x%x/ste:x%x flg:x%lx",
10385 			did, vport->port_state, ndlp->nlp_flag);
10386 
10387 		phba->fc_stat.elsRcvPLOGI++;
10388 		ndlp = lpfc_plogi_confirm_nport(phba, payload, ndlp);
10389 		if (phba->sli_rev == LPFC_SLI_REV4 &&
10390 		    test_bit(FC_PT2PT, &phba->pport->fc_flag)) {
10391 			vport->fc_prevDID = vport->fc_myDID;
10392 			/* Our DID needs to be updated before registering
10393 			 * the vfi. This is done in lpfc_rcv_plogi but
10394 			 * that is called after the reg_vfi.
10395 			 */
10396 			vport->fc_myDID =
10397 				bf_get(els_rsp64_sid,
10398 				       &elsiocb->wqe.xmit_els_rsp);
10399 			lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10400 					 "3312 Remote port assigned DID x%x "
10401 					 "%x\n", vport->fc_myDID,
10402 					 vport->fc_prevDID);
10403 		}
10404 
10405 		lpfc_send_els_event(vport, ndlp, payload);
10406 
10407 		/* If Nport discovery is delayed, reject PLOGIs */
10408 		if (test_bit(FC_DISC_DELAYED, &vport->fc_flag)) {
10409 			rjt_err = LSRJT_UNABLE_TPC;
10410 			rjt_exp = LSEXP_NOTHING_MORE;
10411 			break;
10412 		}
10413 
10414 		if (vport->port_state < LPFC_DISC_AUTH) {
10415 			if (!test_bit(FC_PT2PT, &phba->pport->fc_flag) ||
10416 			    test_bit(FC_PT2PT_PLOGI, &phba->pport->fc_flag)) {
10417 				rjt_err = LSRJT_UNABLE_TPC;
10418 				rjt_exp = LSEXP_NOTHING_MORE;
10419 				break;
10420 			}
10421 		}
10422 
10423 		lpfc_disc_state_machine(vport, ndlp, elsiocb,
10424 					NLP_EVT_RCV_PLOGI);
10425 
10426 		break;
10427 	case ELS_CMD_FLOGI:
10428 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10429 			"RCV FLOGI:       did:x%x/ste:x%x flg:x%lx",
10430 			did, vport->port_state, ndlp->nlp_flag);
10431 
10432 		phba->fc_stat.elsRcvFLOGI++;
10433 
10434 		/* If the driver believes fabric discovery is done and is ready,
10435 		 * bounce the link.  There is some descrepancy.
10436 		 */
10437 		if (vport->port_state >= LPFC_LOCAL_CFG_LINK &&
10438 		    test_bit(FC_PT2PT, &vport->fc_flag) &&
10439 		    vport->rcv_flogi_cnt >= 1) {
10440 			rjt_err = LSRJT_LOGICAL_BSY;
10441 			rjt_exp = LSEXP_NOTHING_MORE;
10442 			init_link++;
10443 			goto lsrjt;
10444 		}
10445 
10446 		lpfc_els_rcv_flogi(vport, elsiocb, ndlp);
10447 		/* retain node if our response is deferred */
10448 		if (phba->defer_flogi_acc.flag)
10449 			break;
10450 		if (newnode)
10451 			lpfc_disc_state_machine(vport, ndlp, NULL,
10452 					NLP_EVT_DEVICE_RM);
10453 		break;
10454 	case ELS_CMD_LOGO:
10455 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10456 			"RCV LOGO:        did:x%x/ste:x%x flg:x%lx",
10457 			did, vport->port_state, ndlp->nlp_flag);
10458 
10459 		phba->fc_stat.elsRcvLOGO++;
10460 		lpfc_send_els_event(vport, ndlp, payload);
10461 		if (vport->port_state < LPFC_DISC_AUTH) {
10462 			rjt_err = LSRJT_UNABLE_TPC;
10463 			rjt_exp = LSEXP_NOTHING_MORE;
10464 			break;
10465 		}
10466 		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
10467 		if (newnode)
10468 			lpfc_disc_state_machine(vport, ndlp, NULL,
10469 					NLP_EVT_DEVICE_RM);
10470 		break;
10471 	case ELS_CMD_PRLO:
10472 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10473 			"RCV PRLO:        did:x%x/ste:x%x flg:x%lx",
10474 			did, vport->port_state, ndlp->nlp_flag);
10475 
10476 		phba->fc_stat.elsRcvPRLO++;
10477 		lpfc_send_els_event(vport, ndlp, payload);
10478 		if (vport->port_state < LPFC_DISC_AUTH) {
10479 			rjt_err = LSRJT_UNABLE_TPC;
10480 			rjt_exp = LSEXP_NOTHING_MORE;
10481 			break;
10482 		}
10483 		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLO);
10484 		break;
10485 	case ELS_CMD_LCB:
10486 		phba->fc_stat.elsRcvLCB++;
10487 		lpfc_els_rcv_lcb(vport, elsiocb, ndlp);
10488 		break;
10489 	case ELS_CMD_RDP:
10490 		phba->fc_stat.elsRcvRDP++;
10491 		lpfc_els_rcv_rdp(vport, elsiocb, ndlp);
10492 		break;
10493 	case ELS_CMD_RSCN:
10494 		phba->fc_stat.elsRcvRSCN++;
10495 		lpfc_els_rcv_rscn(vport, elsiocb, ndlp);
10496 		if (newnode)
10497 			lpfc_disc_state_machine(vport, ndlp, NULL,
10498 					NLP_EVT_DEVICE_RM);
10499 		break;
10500 	case ELS_CMD_ADISC:
10501 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10502 			"RCV ADISC:       did:x%x/ste:x%x flg:x%lx",
10503 			did, vport->port_state, ndlp->nlp_flag);
10504 
10505 		lpfc_send_els_event(vport, ndlp, payload);
10506 		phba->fc_stat.elsRcvADISC++;
10507 		if (vport->port_state < LPFC_DISC_AUTH) {
10508 			rjt_err = LSRJT_UNABLE_TPC;
10509 			rjt_exp = LSEXP_NOTHING_MORE;
10510 			break;
10511 		}
10512 		lpfc_disc_state_machine(vport, ndlp, elsiocb,
10513 					NLP_EVT_RCV_ADISC);
10514 		break;
10515 	case ELS_CMD_PDISC:
10516 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10517 			"RCV PDISC:       did:x%x/ste:x%x flg:x%lx",
10518 			did, vport->port_state, ndlp->nlp_flag);
10519 
10520 		phba->fc_stat.elsRcvPDISC++;
10521 		if (vport->port_state < LPFC_DISC_AUTH) {
10522 			rjt_err = LSRJT_UNABLE_TPC;
10523 			rjt_exp = LSEXP_NOTHING_MORE;
10524 			break;
10525 		}
10526 		lpfc_disc_state_machine(vport, ndlp, elsiocb,
10527 					NLP_EVT_RCV_PDISC);
10528 		break;
10529 	case ELS_CMD_FARPR:
10530 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10531 			"RCV FARPR:       did:x%x/ste:x%x flg:x%lx",
10532 			did, vport->port_state, ndlp->nlp_flag);
10533 
10534 		phba->fc_stat.elsRcvFARPR++;
10535 		lpfc_els_rcv_farpr(vport, elsiocb, ndlp);
10536 		break;
10537 	case ELS_CMD_FARP:
10538 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10539 			"RCV FARP:        did:x%x/ste:x%x flg:x%lx",
10540 			did, vport->port_state, ndlp->nlp_flag);
10541 
10542 		phba->fc_stat.elsRcvFARP++;
10543 		lpfc_els_rcv_farp(vport, elsiocb, ndlp);
10544 		break;
10545 	case ELS_CMD_FAN:
10546 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10547 			"RCV FAN:         did:x%x/ste:x%x flg:x%lx",
10548 			did, vport->port_state, ndlp->nlp_flag);
10549 
10550 		phba->fc_stat.elsRcvFAN++;
10551 		lpfc_els_rcv_fan(vport, elsiocb, ndlp);
10552 		break;
10553 	case ELS_CMD_PRLI:
10554 	case ELS_CMD_NVMEPRLI:
10555 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10556 			"RCV PRLI:        did:x%x/ste:x%x flg:x%lx",
10557 			did, vport->port_state, ndlp->nlp_flag);
10558 
10559 		phba->fc_stat.elsRcvPRLI++;
10560 		if ((vport->port_state < LPFC_DISC_AUTH) &&
10561 		    test_bit(FC_FABRIC, &vport->fc_flag)) {
10562 			rjt_err = LSRJT_UNABLE_TPC;
10563 			rjt_exp = LSEXP_NOTHING_MORE;
10564 			break;
10565 		}
10566 		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
10567 		break;
10568 	case ELS_CMD_LIRR:
10569 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10570 			"RCV LIRR:        did:x%x/ste:x%x flg:x%lx",
10571 			did, vport->port_state, ndlp->nlp_flag);
10572 
10573 		phba->fc_stat.elsRcvLIRR++;
10574 		lpfc_els_rcv_lirr(vport, elsiocb, ndlp);
10575 		if (newnode)
10576 			lpfc_disc_state_machine(vport, ndlp, NULL,
10577 					NLP_EVT_DEVICE_RM);
10578 		break;
10579 	case ELS_CMD_RLS:
10580 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10581 			"RCV RLS:         did:x%x/ste:x%x flg:x%lx",
10582 			did, vport->port_state, ndlp->nlp_flag);
10583 
10584 		phba->fc_stat.elsRcvRLS++;
10585 		lpfc_els_rcv_rls(vport, elsiocb, ndlp);
10586 		if (newnode)
10587 			lpfc_disc_state_machine(vport, ndlp, NULL,
10588 					NLP_EVT_DEVICE_RM);
10589 		break;
10590 	case ELS_CMD_RPL:
10591 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10592 			"RCV RPL:         did:x%x/ste:x%x flg:x%lx",
10593 			did, vport->port_state, ndlp->nlp_flag);
10594 
10595 		phba->fc_stat.elsRcvRPL++;
10596 		lpfc_els_rcv_rpl(vport, elsiocb, ndlp);
10597 		if (newnode)
10598 			lpfc_disc_state_machine(vport, ndlp, NULL,
10599 					NLP_EVT_DEVICE_RM);
10600 		break;
10601 	case ELS_CMD_RNID:
10602 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10603 			"RCV RNID:        did:x%x/ste:x%x flg:x%lx",
10604 			did, vport->port_state, ndlp->nlp_flag);
10605 
10606 		phba->fc_stat.elsRcvRNID++;
10607 		lpfc_els_rcv_rnid(vport, elsiocb, ndlp);
10608 		if (newnode)
10609 			lpfc_disc_state_machine(vport, ndlp, NULL,
10610 					NLP_EVT_DEVICE_RM);
10611 		break;
10612 	case ELS_CMD_RTV:
10613 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10614 			"RCV RTV:        did:x%x/ste:x%x flg:x%lx",
10615 			did, vport->port_state, ndlp->nlp_flag);
10616 		phba->fc_stat.elsRcvRTV++;
10617 		lpfc_els_rcv_rtv(vport, elsiocb, ndlp);
10618 		if (newnode)
10619 			lpfc_disc_state_machine(vport, ndlp, NULL,
10620 					NLP_EVT_DEVICE_RM);
10621 		break;
10622 	case ELS_CMD_RRQ:
10623 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10624 			"RCV RRQ:         did:x%x/ste:x%x flg:x%lx",
10625 			did, vport->port_state, ndlp->nlp_flag);
10626 
10627 		phba->fc_stat.elsRcvRRQ++;
10628 		lpfc_els_rcv_rrq(vport, elsiocb, ndlp);
10629 		if (newnode)
10630 			lpfc_disc_state_machine(vport, ndlp, NULL,
10631 					NLP_EVT_DEVICE_RM);
10632 		break;
10633 	case ELS_CMD_ECHO:
10634 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10635 			"RCV ECHO:        did:x%x/ste:x%x flg:x%lx",
10636 			did, vport->port_state, ndlp->nlp_flag);
10637 
10638 		phba->fc_stat.elsRcvECHO++;
10639 		lpfc_els_rcv_echo(vport, elsiocb, ndlp);
10640 		if (newnode)
10641 			lpfc_disc_state_machine(vport, ndlp, NULL,
10642 					NLP_EVT_DEVICE_RM);
10643 		break;
10644 	case ELS_CMD_REC:
10645 		/* receive this due to exchange closed */
10646 		rjt_err = LSRJT_UNABLE_TPC;
10647 		rjt_exp = LSEXP_INVALID_OX_RX;
10648 		break;
10649 	case ELS_CMD_FPIN:
10650 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10651 				      "RCV FPIN:       did:x%x/ste:x%x "
10652 				      "flg:x%lx",
10653 				      did, vport->port_state, ndlp->nlp_flag);
10654 
10655 		lpfc_els_rcv_fpin(vport, (struct fc_els_fpin *)payload,
10656 				  payload_len);
10657 
10658 		/* There are no replies, so no rjt codes */
10659 		break;
10660 	case ELS_CMD_EDC:
10661 		lpfc_els_rcv_edc(vport, elsiocb, ndlp);
10662 		break;
10663 	case ELS_CMD_RDF:
10664 		phba->fc_stat.elsRcvRDF++;
10665 		/* Accept RDF only from fabric controller */
10666 		if (did != Fabric_Cntl_DID) {
10667 			lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
10668 					 "1115 Received RDF from invalid DID "
10669 					 "x%x\n", did);
10670 			rjt_err = LSRJT_PROTOCOL_ERR;
10671 			rjt_exp = LSEXP_NOTHING_MORE;
10672 			goto lsrjt;
10673 		}
10674 
10675 		lpfc_els_rcv_rdf(vport, elsiocb, ndlp);
10676 		break;
10677 	default:
10678 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10679 			"RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",
10680 			cmd, did, vport->port_state);
10681 
10682 		/* Unsupported ELS command, reject */
10683 		rjt_err = LSRJT_CMD_UNSUPPORTED;
10684 		rjt_exp = LSEXP_NOTHING_MORE;
10685 
10686 		/* Unknown ELS command <elsCmd> received from NPORT <did> */
10687 		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
10688 				 "0115 Unknown ELS command x%x "
10689 				 "received from NPORT x%x\n", cmd, did);
10690 		if (newnode)
10691 			lpfc_disc_state_machine(vport, ndlp, NULL,
10692 					NLP_EVT_DEVICE_RM);
10693 		break;
10694 	}
10695 
10696 lsrjt:
10697 	/* check if need to LS_RJT received ELS cmd */
10698 	if (rjt_err) {
10699 		memset(&stat, 0, sizeof(stat));
10700 		stat.un.b.lsRjtRsnCode = rjt_err;
10701 		stat.un.b.lsRjtRsnCodeExp = rjt_exp;
10702 		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, elsiocb, ndlp,
10703 				    NULL);
10704 		/* Remove the reference from above for new nodes. */
10705 		if (newnode)
10706 			lpfc_disc_state_machine(vport, ndlp, NULL,
10707 					NLP_EVT_DEVICE_RM);
10708 	}
10709 
10710 	/* Release the reference on this elsiocb, not the ndlp. */
10711 	lpfc_nlp_put(elsiocb->ndlp);
10712 	elsiocb->ndlp = NULL;
10713 
10714 	/* Special case.  Driver received an unsolicited command that
10715 	 * unsupportable given the driver's current state.  Reset the
10716 	 * link and start over.
10717 	 */
10718 	if (init_link) {
10719 		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
10720 		if (!mbox)
10721 			return;
10722 		lpfc_linkdown(phba);
10723 		lpfc_init_link(phba, mbox,
10724 			       phba->cfg_topology,
10725 			       phba->cfg_link_speed);
10726 		mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
10727 		mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
10728 		mbox->vport = vport;
10729 		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT) ==
10730 		    MBX_NOT_FINISHED)
10731 			mempool_free(mbox, phba->mbox_mem_pool);
10732 	}
10733 
10734 	return;
10735 
10736 dropit:
10737 	if (vport && !test_bit(FC_UNLOADING, &vport->load_flag))
10738 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10739 			"0111 Dropping received ELS cmd "
10740 			"Data: x%x x%x x%x x%x\n",
10741 			cmd, status, get_job_word4(phba, elsiocb), did);
10742 
10743 	phba->fc_stat.elsRcvDrop++;
10744 }
10745 
10746 /**
10747  * lpfc_els_unsol_event - Process an unsolicited event from an els sli ring
10748  * @phba: pointer to lpfc hba data structure.
10749  * @pring: pointer to a SLI ring.
10750  * @elsiocb: pointer to lpfc els iocb data structure.
10751  *
10752  * This routine is used to process an unsolicited event received from a SLI
10753  * (Service Level Interface) ring. The actual processing of the data buffer
10754  * associated with the unsolicited event is done by invoking the routine
10755  * lpfc_els_unsol_buffer() after properly set up the iocb buffer from the
10756  * SLI ring on which the unsolicited event was received.
10757  **/
10758 void
lpfc_els_unsol_event(struct lpfc_hba * phba,struct lpfc_sli_ring * pring,struct lpfc_iocbq * elsiocb)10759 lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10760 		     struct lpfc_iocbq *elsiocb)
10761 {
10762 	struct lpfc_vport *vport = elsiocb->vport;
10763 	u32 ulp_command, status, parameter, bde_count = 0;
10764 	IOCB_t *icmd;
10765 	struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
10766 	struct lpfc_dmabuf *bdeBuf1 = elsiocb->cmd_dmabuf;
10767 	struct lpfc_dmabuf *bdeBuf2 = elsiocb->bpl_dmabuf;
10768 	dma_addr_t paddr;
10769 
10770 	elsiocb->cmd_dmabuf = NULL;
10771 	elsiocb->rsp_dmabuf = NULL;
10772 	elsiocb->bpl_dmabuf = NULL;
10773 
10774 	wcqe_cmpl = &elsiocb->wcqe_cmpl;
10775 	ulp_command = get_job_cmnd(phba, elsiocb);
10776 	status = get_job_ulpstatus(phba, elsiocb);
10777 	parameter = get_job_word4(phba, elsiocb);
10778 	if (phba->sli_rev == LPFC_SLI_REV4)
10779 		bde_count = wcqe_cmpl->word3;
10780 	else
10781 		bde_count = elsiocb->iocb.ulpBdeCount;
10782 
10783 	if (status == IOSTAT_NEED_BUFFER) {
10784 		lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
10785 	} else if (status == IOSTAT_LOCAL_REJECT &&
10786 		   (parameter & IOERR_PARAM_MASK) ==
10787 		   IOERR_RCV_BUFFER_WAITING) {
10788 		phba->fc_stat.NoRcvBuf++;
10789 		/* Not enough posted buffers; Try posting more buffers */
10790 		if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
10791 			lpfc_sli3_post_buffer(phba, pring, 0);
10792 		return;
10793 	}
10794 
10795 	if (phba->sli_rev == LPFC_SLI_REV3) {
10796 		icmd = &elsiocb->iocb;
10797 		if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
10798 		    (ulp_command == CMD_IOCB_RCV_ELS64_CX ||
10799 		     ulp_command == CMD_IOCB_RCV_SEQ64_CX)) {
10800 			if (icmd->unsli3.rcvsli3.vpi == 0xffff)
10801 				vport = phba->pport;
10802 			else
10803 				vport = lpfc_find_vport_by_vpid(phba,
10804 						icmd->unsli3.rcvsli3.vpi);
10805 		}
10806 	}
10807 
10808 	/* If there are no BDEs associated
10809 	 * with this IOCB, there is nothing to do.
10810 	 */
10811 	if (bde_count == 0)
10812 		return;
10813 
10814 	/* Account for SLI2 or SLI3 and later unsolicited buffering */
10815 	if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
10816 		elsiocb->cmd_dmabuf = bdeBuf1;
10817 		if (bde_count == 2)
10818 			elsiocb->bpl_dmabuf = bdeBuf2;
10819 	} else {
10820 		icmd = &elsiocb->iocb;
10821 		paddr = getPaddr(icmd->un.cont64[0].addrHigh,
10822 				 icmd->un.cont64[0].addrLow);
10823 		elsiocb->cmd_dmabuf = lpfc_sli_ringpostbuf_get(phba, pring,
10824 							       paddr);
10825 		if (bde_count == 2) {
10826 			paddr = getPaddr(icmd->un.cont64[1].addrHigh,
10827 					 icmd->un.cont64[1].addrLow);
10828 			elsiocb->bpl_dmabuf = lpfc_sli_ringpostbuf_get(phba,
10829 									pring,
10830 									paddr);
10831 		}
10832 	}
10833 
10834 	lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
10835 	/*
10836 	 * The different unsolicited event handlers would tell us
10837 	 * if they are done with "mp" by setting cmd_dmabuf to NULL.
10838 	 */
10839 	if (elsiocb->cmd_dmabuf) {
10840 		lpfc_in_buf_free(phba, elsiocb->cmd_dmabuf);
10841 		elsiocb->cmd_dmabuf = NULL;
10842 	}
10843 
10844 	if (elsiocb->bpl_dmabuf) {
10845 		lpfc_in_buf_free(phba, elsiocb->bpl_dmabuf);
10846 		elsiocb->bpl_dmabuf = NULL;
10847 	}
10848 
10849 }
10850 
10851 static void
lpfc_start_fdmi(struct lpfc_vport * vport)10852 lpfc_start_fdmi(struct lpfc_vport *vport)
10853 {
10854 	struct lpfc_nodelist *ndlp;
10855 
10856 	/* If this is the first time, allocate an ndlp and initialize
10857 	 * it. Otherwise, make sure the node is enabled and then do the
10858 	 * login.
10859 	 */
10860 	ndlp = lpfc_findnode_did(vport, FDMI_DID);
10861 	if (!ndlp) {
10862 		ndlp = lpfc_nlp_init(vport, FDMI_DID);
10863 		if (ndlp) {
10864 			ndlp->nlp_type |= NLP_FABRIC;
10865 		} else {
10866 			return;
10867 		}
10868 	}
10869 
10870 	lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10871 	lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
10872 }
10873 
10874 /**
10875  * lpfc_do_scr_ns_plogi - Issue a plogi to the name server for scr
10876  * @phba: pointer to lpfc hba data structure.
10877  * @vport: pointer to a virtual N_Port data structure.
10878  *
10879  * This routine issues a Port Login (PLOGI) to the Name Server with
10880  * State Change Request (SCR) for a @vport. This routine will create an
10881  * ndlp for the Name Server associated to the @vport if such node does
10882  * not already exist. The PLOGI to Name Server is issued by invoking the
10883  * lpfc_issue_els_plogi() routine. If Fabric-Device Management Interface
10884  * (FDMI) is configured to the @vport, a FDMI node will be created and
10885  * the PLOGI to FDMI is issued by invoking lpfc_issue_els_plogi() routine.
10886  **/
10887 void
lpfc_do_scr_ns_plogi(struct lpfc_hba * phba,struct lpfc_vport * vport)10888 lpfc_do_scr_ns_plogi(struct lpfc_hba *phba, struct lpfc_vport *vport)
10889 {
10890 	struct lpfc_nodelist *ndlp;
10891 
10892 	/*
10893 	 * If lpfc_delay_discovery parameter is set and the clean address
10894 	 * bit is cleared and fc fabric parameters chenged, delay FC NPort
10895 	 * discovery.
10896 	 */
10897 	if (test_bit(FC_DISC_DELAYED, &vport->fc_flag)) {
10898 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10899 				 "3334 Delay fc port discovery for %d secs\n",
10900 				 phba->fc_ratov);
10901 		mod_timer(&vport->delayed_disc_tmo,
10902 			jiffies + msecs_to_jiffies(1000 * phba->fc_ratov));
10903 		return;
10904 	}
10905 
10906 	ndlp = lpfc_findnode_did(vport, NameServer_DID);
10907 	if (!ndlp) {
10908 		ndlp = lpfc_nlp_init(vport, NameServer_DID);
10909 		if (!ndlp) {
10910 			if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
10911 				lpfc_disc_start(vport);
10912 				return;
10913 			}
10914 			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10915 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10916 					 "0251 NameServer login: no memory\n");
10917 			return;
10918 		}
10919 	}
10920 
10921 	ndlp->nlp_type |= NLP_FABRIC;
10922 
10923 	lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10924 
10925 	if (lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0)) {
10926 		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10927 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10928 				 "0252 Cannot issue NameServer login\n");
10929 		return;
10930 	}
10931 
10932 	if ((phba->cfg_enable_SmartSAN ||
10933 	     phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT) &&
10934 	    test_bit(FC_ALLOW_FDMI, &vport->load_flag))
10935 		lpfc_start_fdmi(vport);
10936 }
10937 
10938 /**
10939  * lpfc_cmpl_reg_new_vport - Completion callback function to register new vport
10940  * @phba: pointer to lpfc hba data structure.
10941  * @pmb: pointer to the driver internal queue element for mailbox command.
10942  *
10943  * This routine is the completion callback function to register new vport
10944  * mailbox command. If the new vport mailbox command completes successfully,
10945  * the fabric registration login shall be performed on physical port (the
10946  * new vport created is actually a physical port, with VPI 0) or the port
10947  * login to Name Server for State Change Request (SCR) will be performed
10948  * on virtual port (real virtual port, with VPI greater than 0).
10949  **/
10950 static void
lpfc_cmpl_reg_new_vport(struct lpfc_hba * phba,LPFC_MBOXQ_t * pmb)10951 lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
10952 {
10953 	struct lpfc_vport *vport = pmb->vport;
10954 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10955 	struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
10956 	MAILBOX_t *mb = &pmb->u.mb;
10957 	int rc;
10958 
10959 	clear_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag);
10960 
10961 	if (mb->mbxStatus) {
10962 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10963 				"0915 Register VPI failed : Status: x%x"
10964 				" upd bit: x%x \n", mb->mbxStatus,
10965 				 mb->un.varRegVpi.upd);
10966 		if (phba->sli_rev == LPFC_SLI_REV4 &&
10967 			mb->un.varRegVpi.upd)
10968 			goto mbox_err_exit ;
10969 
10970 		switch (mb->mbxStatus) {
10971 		case 0x11:	/* unsupported feature */
10972 		case 0x9603:	/* max_vpi exceeded */
10973 		case 0x9602:	/* Link event since CLEAR_LA */
10974 			/* giving up on vport registration */
10975 			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10976 			clear_bit(FC_FABRIC, &vport->fc_flag);
10977 			clear_bit(FC_PUBLIC_LOOP, &vport->fc_flag);
10978 			lpfc_can_disctmo(vport);
10979 			break;
10980 		/* If reg_vpi fail with invalid VPI status, re-init VPI */
10981 		case 0x20:
10982 			set_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag);
10983 			lpfc_init_vpi(phba, pmb, vport->vpi);
10984 			pmb->vport = vport;
10985 			pmb->mbox_cmpl = lpfc_init_vpi_cmpl;
10986 			rc = lpfc_sli_issue_mbox(phba, pmb,
10987 				MBX_NOWAIT);
10988 			if (rc == MBX_NOT_FINISHED) {
10989 				lpfc_printf_vlog(vport, KERN_ERR,
10990 						 LOG_TRACE_EVENT,
10991 					"2732 Failed to issue INIT_VPI"
10992 					" mailbox command\n");
10993 			} else {
10994 				lpfc_nlp_put(ndlp);
10995 				return;
10996 			}
10997 			fallthrough;
10998 		default:
10999 			/* Try to recover from this error */
11000 			if (phba->sli_rev == LPFC_SLI_REV4)
11001 				lpfc_sli4_unreg_all_rpis(vport);
11002 			lpfc_mbx_unreg_vpi(vport);
11003 			set_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag);
11004 			if (mb->mbxStatus == MBX_NOT_FINISHED)
11005 				break;
11006 			if ((vport->port_type == LPFC_PHYSICAL_PORT) &&
11007 			    !test_bit(FC_LOGO_RCVD_DID_CHNG, &vport->fc_flag)) {
11008 				if (phba->sli_rev == LPFC_SLI_REV4)
11009 					lpfc_issue_init_vfi(vport);
11010 				else
11011 					lpfc_initial_flogi(vport);
11012 			} else {
11013 				lpfc_initial_fdisc(vport);
11014 			}
11015 			break;
11016 		}
11017 	} else {
11018 		spin_lock_irq(shost->host_lock);
11019 		vport->vpi_state |= LPFC_VPI_REGISTERED;
11020 		spin_unlock_irq(shost->host_lock);
11021 		if (vport == phba->pport) {
11022 			if (phba->sli_rev < LPFC_SLI_REV4)
11023 				lpfc_issue_fabric_reglogin(vport);
11024 			else {
11025 				/*
11026 				 * If the physical port is instantiated using
11027 				 * FDISC, do not start vport discovery.
11028 				 */
11029 				if (vport->port_state != LPFC_FDISC)
11030 					lpfc_start_fdiscs(phba);
11031 				lpfc_do_scr_ns_plogi(phba, vport);
11032 			}
11033 		} else {
11034 			lpfc_do_scr_ns_plogi(phba, vport);
11035 		}
11036 	}
11037 mbox_err_exit:
11038 	/* Now, we decrement the ndlp reference count held for this
11039 	 * callback function
11040 	 */
11041 	lpfc_nlp_put(ndlp);
11042 
11043 	mempool_free(pmb, phba->mbox_mem_pool);
11044 
11045 	/* reinitialize the VMID datastructure before returning.
11046 	 * this is specifically for vport
11047 	 */
11048 	if (lpfc_is_vmid_enabled(phba))
11049 		lpfc_reinit_vmid(vport);
11050 	vport->vmid_flag = vport->phba->pport->vmid_flag;
11051 
11052 	return;
11053 }
11054 
11055 /**
11056  * lpfc_register_new_vport - Register a new vport with a HBA
11057  * @phba: pointer to lpfc hba data structure.
11058  * @vport: pointer to a host virtual N_Port data structure.
11059  * @ndlp: pointer to a node-list data structure.
11060  *
11061  * This routine registers the @vport as a new virtual port with a HBA.
11062  * It is done through a registering vpi mailbox command.
11063  **/
11064 void
lpfc_register_new_vport(struct lpfc_hba * phba,struct lpfc_vport * vport,struct lpfc_nodelist * ndlp)11065 lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
11066 			struct lpfc_nodelist *ndlp)
11067 {
11068 	LPFC_MBOXQ_t *mbox;
11069 
11070 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
11071 	if (mbox) {
11072 		lpfc_reg_vpi(vport, mbox);
11073 		mbox->vport = vport;
11074 		mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
11075 		if (!mbox->ctx_ndlp) {
11076 			mempool_free(mbox, phba->mbox_mem_pool);
11077 			goto mbox_err_exit;
11078 		}
11079 
11080 		mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
11081 		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
11082 		    == MBX_NOT_FINISHED) {
11083 			/* mailbox command not success, decrement ndlp
11084 			 * reference count for this command
11085 			 */
11086 			lpfc_nlp_put(ndlp);
11087 			mempool_free(mbox, phba->mbox_mem_pool);
11088 
11089 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11090 				"0253 Register VPI: Can't send mbox\n");
11091 			goto mbox_err_exit;
11092 		}
11093 	} else {
11094 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11095 				 "0254 Register VPI: no memory\n");
11096 		goto mbox_err_exit;
11097 	}
11098 	return;
11099 
11100 mbox_err_exit:
11101 	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11102 	clear_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag);
11103 	return;
11104 }
11105 
11106 /**
11107  * lpfc_cancel_all_vport_retry_delay_timer - Cancel all vport retry delay timer
11108  * @phba: pointer to lpfc hba data structure.
11109  *
11110  * This routine cancels the retry delay timers to all the vports.
11111  **/
11112 void
lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba * phba)11113 lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *phba)
11114 {
11115 	struct lpfc_vport **vports;
11116 	struct lpfc_nodelist *ndlp;
11117 	uint32_t link_state;
11118 	int i;
11119 
11120 	/* Treat this failure as linkdown for all vports */
11121 	link_state = phba->link_state;
11122 	lpfc_linkdown(phba);
11123 	phba->link_state = link_state;
11124 
11125 	vports = lpfc_create_vport_work_array(phba);
11126 
11127 	if (vports) {
11128 		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
11129 			ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
11130 			if (ndlp)
11131 				lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
11132 			lpfc_els_flush_cmd(vports[i]);
11133 		}
11134 		lpfc_destroy_vport_work_array(phba, vports);
11135 	}
11136 }
11137 
11138 /**
11139  * lpfc_retry_pport_discovery - Start timer to retry FLOGI.
11140  * @phba: pointer to lpfc hba data structure.
11141  *
11142  * This routine abort all pending discovery commands and
11143  * start a timer to retry FLOGI for the physical port
11144  * discovery.
11145  **/
11146 void
lpfc_retry_pport_discovery(struct lpfc_hba * phba)11147 lpfc_retry_pport_discovery(struct lpfc_hba *phba)
11148 {
11149 	struct lpfc_nodelist *ndlp;
11150 
11151 	/* Cancel the all vports retry delay retry timers */
11152 	lpfc_cancel_all_vport_retry_delay_timer(phba);
11153 
11154 	/* If fabric require FLOGI, then re-instantiate physical login */
11155 	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
11156 	if (!ndlp)
11157 		return;
11158 
11159 	mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
11160 	set_bit(NLP_DELAY_TMO, &ndlp->nlp_flag);
11161 	ndlp->nlp_last_elscmd = ELS_CMD_FLOGI;
11162 	phba->pport->port_state = LPFC_FLOGI;
11163 	return;
11164 }
11165 
11166 /**
11167  * lpfc_fabric_login_reqd - Check if FLOGI required.
11168  * @phba: pointer to lpfc hba data structure.
11169  * @cmdiocb: pointer to FDISC command iocb.
11170  * @rspiocb: pointer to FDISC response iocb.
11171  *
11172  * This routine checks if a FLOGI is reguired for FDISC
11173  * to succeed.
11174  **/
11175 static int
lpfc_fabric_login_reqd(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)11176 lpfc_fabric_login_reqd(struct lpfc_hba *phba,
11177 		struct lpfc_iocbq *cmdiocb,
11178 		struct lpfc_iocbq *rspiocb)
11179 {
11180 	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
11181 	u32 ulp_word4 = get_job_word4(phba, rspiocb);
11182 
11183 	if (ulp_status != IOSTAT_FABRIC_RJT ||
11184 	    ulp_word4 != RJT_LOGIN_REQUIRED)
11185 		return 0;
11186 	else
11187 		return 1;
11188 }
11189 
11190 /**
11191  * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
11192  * @phba: pointer to lpfc hba data structure.
11193  * @cmdiocb: pointer to lpfc command iocb data structure.
11194  * @rspiocb: pointer to lpfc response iocb data structure.
11195  *
11196  * This routine is the completion callback function to a Fabric Discover
11197  * (FDISC) ELS command. Since all the FDISC ELS commands are issued
11198  * single threaded, each FDISC completion callback function will reset
11199  * the discovery timer for all vports such that the timers will not get
11200  * unnecessary timeout. The function checks the FDISC IOCB status. If error
11201  * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
11202  * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
11203  * assigned to the vport has been changed with the completion of the FDISC
11204  * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
11205  * are unregistered from the HBA, and then the lpfc_register_new_vport()
11206  * routine is invoked to register new vport with the HBA. Otherwise, the
11207  * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
11208  * Server for State Change Request (SCR).
11209  **/
11210 static void
lpfc_cmpl_els_fdisc(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)11211 lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11212 		    struct lpfc_iocbq *rspiocb)
11213 {
11214 	struct lpfc_vport *vport = cmdiocb->vport;
11215 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
11216 	struct lpfc_nodelist *np;
11217 	struct lpfc_nodelist *next_np;
11218 	struct lpfc_iocbq *piocb;
11219 	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf, *prsp;
11220 	struct serv_parm *sp;
11221 	uint8_t fabric_param_changed;
11222 	u32 ulp_status, ulp_word4;
11223 
11224 	ulp_status = get_job_ulpstatus(phba, rspiocb);
11225 	ulp_word4 = get_job_word4(phba, rspiocb);
11226 
11227 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
11228 			 "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
11229 			 ulp_status, ulp_word4,
11230 			 vport->fc_prevDID);
11231 	/* Since all FDISCs are being single threaded, we
11232 	 * must reset the discovery timer for ALL vports
11233 	 * waiting to send FDISC when one completes.
11234 	 */
11235 	list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
11236 		lpfc_set_disctmo(piocb->vport);
11237 	}
11238 
11239 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11240 		"FDISC cmpl:      status:x%x/x%x prevdid:x%x",
11241 		ulp_status, ulp_word4, vport->fc_prevDID);
11242 
11243 	if (ulp_status) {
11244 
11245 		if (lpfc_fabric_login_reqd(phba, cmdiocb, rspiocb)) {
11246 			lpfc_retry_pport_discovery(phba);
11247 			goto out;
11248 		}
11249 
11250 		/* Check for retry */
11251 		if (lpfc_els_retry(phba, cmdiocb, rspiocb))
11252 			goto out;
11253 		/* Warn FDISC status */
11254 		lpfc_vlog_msg(vport, KERN_WARNING, LOG_ELS,
11255 			      "0126 FDISC cmpl status: x%x/x%x)\n",
11256 			      ulp_status, ulp_word4);
11257 		goto fdisc_failed;
11258 	}
11259 
11260 	lpfc_check_nlp_post_devloss(vport, ndlp);
11261 
11262 	clear_bit(FC_VPORT_CVL_RCVD, &vport->fc_flag);
11263 	clear_bit(FC_VPORT_LOGO_RCVD, &vport->fc_flag);
11264 	set_bit(FC_FABRIC, &vport->fc_flag);
11265 	if (vport->phba->fc_topology == LPFC_TOPOLOGY_LOOP)
11266 		set_bit(FC_PUBLIC_LOOP, &vport->fc_flag);
11267 
11268 	vport->fc_myDID = ulp_word4 & Mask_DID;
11269 	lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
11270 	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
11271 	if (!prsp)
11272 		goto out;
11273 	if (!lpfc_is_els_acc_rsp(prsp))
11274 		goto out;
11275 
11276 	sp = prsp->virt + sizeof(uint32_t);
11277 	fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
11278 	memcpy(&vport->fabric_portname, &sp->portName,
11279 		sizeof(struct lpfc_name));
11280 	memcpy(&vport->fabric_nodename, &sp->nodeName,
11281 		sizeof(struct lpfc_name));
11282 	if (fabric_param_changed &&
11283 		!test_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag)) {
11284 		/* If our NportID changed, we need to ensure all
11285 		 * remaining NPORTs get unreg_login'ed so we can
11286 		 * issue unreg_vpi.
11287 		 */
11288 		list_for_each_entry_safe(np, next_np,
11289 			&vport->fc_nodes, nlp_listp) {
11290 			if ((np->nlp_state != NLP_STE_NPR_NODE) ||
11291 			    !test_bit(NLP_NPR_ADISC, &np->nlp_flag))
11292 				continue;
11293 			clear_bit(NLP_NPR_ADISC, &np->nlp_flag);
11294 			lpfc_unreg_rpi(vport, np);
11295 		}
11296 		lpfc_cleanup_pending_mbox(vport);
11297 
11298 		if (phba->sli_rev == LPFC_SLI_REV4)
11299 			lpfc_sli4_unreg_all_rpis(vport);
11300 
11301 		lpfc_mbx_unreg_vpi(vport);
11302 		set_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag);
11303 		if (phba->sli_rev == LPFC_SLI_REV4)
11304 			set_bit(FC_VPORT_NEEDS_INIT_VPI, &vport->fc_flag);
11305 		else
11306 			set_bit(FC_LOGO_RCVD_DID_CHNG, &vport->fc_flag);
11307 	} else if ((phba->sli_rev == LPFC_SLI_REV4) &&
11308 		   !test_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag)) {
11309 		/*
11310 		 * Driver needs to re-reg VPI in order for f/w
11311 		 * to update the MAC address.
11312 		 */
11313 		lpfc_register_new_vport(phba, vport, ndlp);
11314 		lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
11315 		goto out;
11316 	}
11317 
11318 	if (test_bit(FC_VPORT_NEEDS_INIT_VPI, &vport->fc_flag))
11319 		lpfc_issue_init_vpi(vport);
11320 	else if (test_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag))
11321 		lpfc_register_new_vport(phba, vport, ndlp);
11322 	else
11323 		lpfc_do_scr_ns_plogi(phba, vport);
11324 
11325 	/* The FDISC completed successfully. Move the fabric ndlp to
11326 	 * UNMAPPED state and register with the transport.
11327 	 */
11328 	lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
11329 	goto out;
11330 
11331 fdisc_failed:
11332 	if (vport->fc_vport &&
11333 	    (vport->fc_vport->vport_state != FC_VPORT_NO_FABRIC_RSCS))
11334 		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11335 	/* Cancel discovery timer */
11336 	lpfc_can_disctmo(vport);
11337 out:
11338 	lpfc_els_free_iocb(phba, cmdiocb);
11339 	lpfc_nlp_put(ndlp);
11340 }
11341 
11342 /**
11343  * lpfc_issue_els_fdisc - Issue a fdisc iocb command
11344  * @vport: pointer to a virtual N_Port data structure.
11345  * @ndlp: pointer to a node-list data structure.
11346  * @retry: number of retries to the command IOCB.
11347  *
11348  * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
11349  * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
11350  * routine to issue the IOCB, which makes sure only one outstanding fabric
11351  * IOCB will be sent off HBA at any given time.
11352  *
11353  * Note that the ndlp reference count will be incremented by 1 for holding the
11354  * ndlp and the reference to ndlp will be stored into the ndlp field of
11355  * the IOCB for the completion callback function to the FDISC ELS command.
11356  *
11357  * Return code
11358  *   0 - Successfully issued fdisc iocb command
11359  *   1 - Failed to issue fdisc iocb command
11360  **/
11361 static int
lpfc_issue_els_fdisc(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp,uint8_t retry)11362 lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
11363 		     uint8_t retry)
11364 {
11365 	struct lpfc_hba *phba = vport->phba;
11366 	IOCB_t *icmd;
11367 	union lpfc_wqe128 *wqe = NULL;
11368 	struct lpfc_iocbq *elsiocb;
11369 	struct serv_parm *sp;
11370 	uint8_t *pcmd;
11371 	uint16_t cmdsize;
11372 	int did = ndlp->nlp_DID;
11373 	int rc;
11374 
11375 	vport->port_state = LPFC_FDISC;
11376 	vport->fc_myDID = 0;
11377 	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
11378 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
11379 				     ELS_CMD_FDISC);
11380 	if (!elsiocb) {
11381 		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11382 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11383 				 "0255 Issue FDISC: no IOCB\n");
11384 		return 1;
11385 	}
11386 
11387 	if (phba->sli_rev == LPFC_SLI_REV4) {
11388 		wqe = &elsiocb->wqe;
11389 		bf_set(els_req64_sid, &wqe->els_req, 0);
11390 		bf_set(els_req64_sp, &wqe->els_req, 1);
11391 	} else {
11392 		icmd = &elsiocb->iocb;
11393 		icmd->un.elsreq64.myID = 0;
11394 		icmd->un.elsreq64.fl = 1;
11395 		icmd->ulpCt_h = 1;
11396 		icmd->ulpCt_l = 0;
11397 	}
11398 
11399 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
11400 	*((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
11401 	pcmd += sizeof(uint32_t); /* CSP Word 1 */
11402 	memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
11403 	sp = (struct serv_parm *) pcmd;
11404 	/* Setup CSPs accordingly for Fabric */
11405 	sp->cmn.e_d_tov = 0;
11406 	sp->cmn.w2.r_a_tov = 0;
11407 	sp->cmn.virtual_fabric_support = 0;
11408 	sp->cls1.classValid = 0;
11409 	sp->cls2.seqDelivery = 1;
11410 	sp->cls3.seqDelivery = 1;
11411 
11412 	pcmd += sizeof(uint32_t); /* CSP Word 2 */
11413 	pcmd += sizeof(uint32_t); /* CSP Word 3 */
11414 	pcmd += sizeof(uint32_t); /* CSP Word 4 */
11415 	pcmd += sizeof(uint32_t); /* Port Name */
11416 	memcpy(pcmd, &vport->fc_portname, 8);
11417 	pcmd += sizeof(uint32_t); /* Node Name */
11418 	pcmd += sizeof(uint32_t); /* Node Name */
11419 	memcpy(pcmd, &vport->fc_nodename, 8);
11420 	sp->cmn.valid_vendor_ver_level = 0;
11421 	memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
11422 	lpfc_set_disctmo(vport);
11423 
11424 	phba->fc_stat.elsXmitFDISC++;
11425 	elsiocb->cmd_cmpl = lpfc_cmpl_els_fdisc;
11426 
11427 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11428 		"Issue FDISC:     did:x%x",
11429 		did, 0, 0);
11430 
11431 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
11432 	if (!elsiocb->ndlp)
11433 		goto err_out;
11434 
11435 	rc = lpfc_issue_fabric_iocb(phba, elsiocb);
11436 	if (rc == IOCB_ERROR) {
11437 		lpfc_nlp_put(ndlp);
11438 		goto err_out;
11439 	}
11440 
11441 	lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
11442 	return 0;
11443 
11444  err_out:
11445 	lpfc_els_free_iocb(phba, elsiocb);
11446 	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11447 	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11448 			 "0256 Issue FDISC: Cannot send IOCB\n");
11449 	return 1;
11450 }
11451 
11452 /**
11453  * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
11454  * @phba: pointer to lpfc hba data structure.
11455  * @cmdiocb: pointer to lpfc command iocb data structure.
11456  * @rspiocb: pointer to lpfc response iocb data structure.
11457  *
11458  * This routine is the completion callback function to the issuing of a LOGO
11459  * ELS command off a vport. It frees the command IOCB and then decrement the
11460  * reference count held on ndlp for this completion function, indicating that
11461  * the reference to the ndlp is no long needed. Note that the
11462  * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
11463  * callback function and an additional explicit ndlp reference decrementation
11464  * will trigger the actual release of the ndlp.
11465  **/
11466 static void
lpfc_cmpl_els_npiv_logo(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)11467 lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11468 			struct lpfc_iocbq *rspiocb)
11469 {
11470 	struct lpfc_vport *vport = cmdiocb->vport;
11471 	IOCB_t *irsp;
11472 	struct lpfc_nodelist *ndlp;
11473 	u32 ulp_status, ulp_word4, did, tmo;
11474 
11475 	ndlp = cmdiocb->ndlp;
11476 
11477 	ulp_status = get_job_ulpstatus(phba, rspiocb);
11478 	ulp_word4 = get_job_word4(phba, rspiocb);
11479 
11480 	if (phba->sli_rev == LPFC_SLI_REV4) {
11481 		did = get_job_els_rsp64_did(phba, cmdiocb);
11482 		tmo = get_wqe_tmo(cmdiocb);
11483 	} else {
11484 		irsp = &rspiocb->iocb;
11485 		did = get_job_els_rsp64_did(phba, rspiocb);
11486 		tmo = irsp->ulpTimeout;
11487 	}
11488 
11489 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11490 		"LOGO npiv cmpl:  status:x%x/x%x did:x%x",
11491 		ulp_status, ulp_word4, did);
11492 
11493 	/* NPIV LOGO completes to NPort <nlp_DID> */
11494 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
11495 			 "2928 NPIV LOGO completes to NPort x%x "
11496 			 "Data: x%x x%x x%x x%x x%x x%lx x%x\n",
11497 			 ndlp->nlp_DID, ulp_status, ulp_word4,
11498 			 tmo, vport->num_disc_nodes,
11499 			 kref_read(&ndlp->kref), ndlp->nlp_flag,
11500 			 ndlp->fc4_xpt_flags);
11501 
11502 	if (ulp_status == IOSTAT_SUCCESS) {
11503 		clear_bit(FC_NDISC_ACTIVE, &vport->fc_flag);
11504 		clear_bit(FC_FABRIC, &vport->fc_flag);
11505 		lpfc_can_disctmo(vport);
11506 	}
11507 
11508 	if (test_bit(NLP_WAIT_FOR_LOGO, &ndlp->save_flags)) {
11509 		/* Wake up lpfc_vport_delete if waiting...*/
11510 		if (ndlp->logo_waitq)
11511 			wake_up(ndlp->logo_waitq);
11512 		clear_bit(NLP_ISSUE_LOGO, &ndlp->nlp_flag);
11513 		clear_bit(NLP_LOGO_SND, &ndlp->nlp_flag);
11514 		clear_bit(NLP_WAIT_FOR_LOGO, &ndlp->save_flags);
11515 	}
11516 
11517 	/* Safe to release resources now. */
11518 	lpfc_els_free_iocb(phba, cmdiocb);
11519 	lpfc_nlp_put(ndlp);
11520 }
11521 
11522 /**
11523  * lpfc_issue_els_npiv_logo - Issue a logo off a vport
11524  * @vport: pointer to a virtual N_Port data structure.
11525  * @ndlp: pointer to a node-list data structure.
11526  *
11527  * This routine issues a LOGO ELS command to an @ndlp off a @vport.
11528  *
11529  * Note that the ndlp reference count will be incremented by 1 for holding the
11530  * ndlp and the reference to ndlp will be stored into the ndlp field of
11531  * the IOCB for the completion callback function to the LOGO ELS command.
11532  *
11533  * Return codes
11534  *   0 - Successfully issued logo off the @vport
11535  *   1 - Failed to issue logo off the @vport
11536  **/
11537 int
lpfc_issue_els_npiv_logo(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp)11538 lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
11539 {
11540 	int rc = 0;
11541 	struct lpfc_hba  *phba = vport->phba;
11542 	struct lpfc_iocbq *elsiocb;
11543 	uint8_t *pcmd;
11544 	uint16_t cmdsize;
11545 
11546 	cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
11547 	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
11548 				     ELS_CMD_LOGO);
11549 	if (!elsiocb)
11550 		return 1;
11551 
11552 	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
11553 	*((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
11554 	pcmd += sizeof(uint32_t);
11555 
11556 	/* Fill in LOGO payload */
11557 	*((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
11558 	pcmd += sizeof(uint32_t);
11559 	memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
11560 
11561 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11562 		"Issue LOGO npiv  did:x%x flg:x%lx",
11563 		ndlp->nlp_DID, ndlp->nlp_flag, 0);
11564 
11565 	elsiocb->cmd_cmpl = lpfc_cmpl_els_npiv_logo;
11566 	set_bit(NLP_LOGO_SND, &ndlp->nlp_flag);
11567 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
11568 	if (!elsiocb->ndlp) {
11569 		lpfc_els_free_iocb(phba, elsiocb);
11570 		goto err;
11571 	}
11572 
11573 	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
11574 	if (rc == IOCB_ERROR) {
11575 		lpfc_els_free_iocb(phba, elsiocb);
11576 		lpfc_nlp_put(ndlp);
11577 		goto err;
11578 	}
11579 	return 0;
11580 
11581 err:
11582 	clear_bit(NLP_LOGO_SND, &ndlp->nlp_flag);
11583 	return 1;
11584 }
11585 
11586 /**
11587  * lpfc_fabric_block_timeout - Handler function to the fabric block timer
11588  * @t: timer context used to obtain the lpfc hba.
11589  *
11590  * This routine is invoked by the fabric iocb block timer after
11591  * timeout. It posts the fabric iocb block timeout event by setting the
11592  * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
11593  * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
11594  * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
11595  * posted event WORKER_FABRIC_BLOCK_TMO.
11596  **/
11597 void
lpfc_fabric_block_timeout(struct timer_list * t)11598 lpfc_fabric_block_timeout(struct timer_list *t)
11599 {
11600 	struct lpfc_hba  *phba = from_timer(phba, t, fabric_block_timer);
11601 	unsigned long iflags;
11602 	uint32_t tmo_posted;
11603 
11604 	spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
11605 	tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
11606 	if (!tmo_posted)
11607 		phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
11608 	spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
11609 
11610 	if (!tmo_posted)
11611 		lpfc_worker_wake_up(phba);
11612 	return;
11613 }
11614 
11615 /**
11616  * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
11617  * @phba: pointer to lpfc hba data structure.
11618  *
11619  * This routine issues one fabric iocb from the driver internal list to
11620  * the HBA. It first checks whether it's ready to issue one fabric iocb to
11621  * the HBA (whether there is no outstanding fabric iocb). If so, it shall
11622  * remove one pending fabric iocb from the driver internal list and invokes
11623  * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
11624  **/
11625 static void
lpfc_resume_fabric_iocbs(struct lpfc_hba * phba)11626 lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
11627 {
11628 	struct lpfc_iocbq *iocb;
11629 	unsigned long iflags;
11630 	int ret;
11631 
11632 repeat:
11633 	iocb = NULL;
11634 	spin_lock_irqsave(&phba->hbalock, iflags);
11635 	/* Post any pending iocb to the SLI layer */
11636 	if (atomic_read(&phba->fabric_iocb_count) == 0) {
11637 		list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
11638 				 list);
11639 		if (iocb)
11640 			/* Increment fabric iocb count to hold the position */
11641 			atomic_inc(&phba->fabric_iocb_count);
11642 	}
11643 	spin_unlock_irqrestore(&phba->hbalock, iflags);
11644 	if (iocb) {
11645 		iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
11646 		iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
11647 		iocb->cmd_flag |= LPFC_IO_FABRIC;
11648 
11649 		lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11650 				      "Fabric sched1:   ste:x%x",
11651 				      iocb->vport->port_state, 0, 0);
11652 
11653 		ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11654 
11655 		if (ret == IOCB_ERROR) {
11656 			iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
11657 			iocb->fabric_cmd_cmpl = NULL;
11658 			iocb->cmd_flag &= ~LPFC_IO_FABRIC;
11659 			set_job_ulpstatus(iocb, IOSTAT_LOCAL_REJECT);
11660 			iocb->wcqe_cmpl.parameter = IOERR_SLI_ABORTED;
11661 			iocb->cmd_cmpl(phba, iocb, iocb);
11662 
11663 			atomic_dec(&phba->fabric_iocb_count);
11664 			goto repeat;
11665 		}
11666 	}
11667 }
11668 
11669 /**
11670  * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
11671  * @phba: pointer to lpfc hba data structure.
11672  *
11673  * This routine unblocks the  issuing fabric iocb command. The function
11674  * will clear the fabric iocb block bit and then invoke the routine
11675  * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
11676  * from the driver internal fabric iocb list.
11677  **/
11678 void
lpfc_unblock_fabric_iocbs(struct lpfc_hba * phba)11679 lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
11680 {
11681 	clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11682 
11683 	lpfc_resume_fabric_iocbs(phba);
11684 	return;
11685 }
11686 
11687 /**
11688  * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
11689  * @phba: pointer to lpfc hba data structure.
11690  *
11691  * This routine blocks the issuing fabric iocb for a specified amount of
11692  * time (currently 100 ms). This is done by set the fabric iocb block bit
11693  * and set up a timeout timer for 100ms. When the block bit is set, no more
11694  * fabric iocb will be issued out of the HBA.
11695  **/
11696 static void
lpfc_block_fabric_iocbs(struct lpfc_hba * phba)11697 lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
11698 {
11699 	int blocked;
11700 
11701 	blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11702 	/* Start a timer to unblock fabric iocbs after 100ms */
11703 	if (!blocked)
11704 		mod_timer(&phba->fabric_block_timer,
11705 			  jiffies + msecs_to_jiffies(100));
11706 
11707 	return;
11708 }
11709 
11710 /**
11711  * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
11712  * @phba: pointer to lpfc hba data structure.
11713  * @cmdiocb: pointer to lpfc command iocb data structure.
11714  * @rspiocb: pointer to lpfc response iocb data structure.
11715  *
11716  * This routine is the callback function that is put to the fabric iocb's
11717  * callback function pointer (iocb->cmd_cmpl). The original iocb's callback
11718  * function pointer has been stored in iocb->fabric_cmd_cmpl. This callback
11719  * function first restores and invokes the original iocb's callback function
11720  * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
11721  * fabric bound iocb from the driver internal fabric iocb list onto the wire.
11722  **/
11723 static void
lpfc_cmpl_fabric_iocb(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)11724 lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11725 		      struct lpfc_iocbq *rspiocb)
11726 {
11727 	struct ls_rjt stat;
11728 	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
11729 	u32 ulp_word4 = get_job_word4(phba, rspiocb);
11730 
11731 	WARN_ON((cmdiocb->cmd_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC);
11732 
11733 	switch (ulp_status) {
11734 		case IOSTAT_NPORT_RJT:
11735 		case IOSTAT_FABRIC_RJT:
11736 			if (ulp_word4 & RJT_UNAVAIL_TEMP)
11737 				lpfc_block_fabric_iocbs(phba);
11738 			break;
11739 
11740 		case IOSTAT_NPORT_BSY:
11741 		case IOSTAT_FABRIC_BSY:
11742 			lpfc_block_fabric_iocbs(phba);
11743 			break;
11744 
11745 		case IOSTAT_LS_RJT:
11746 			stat.un.ls_rjt_error_be =
11747 				cpu_to_be32(ulp_word4);
11748 			if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
11749 				(stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
11750 				lpfc_block_fabric_iocbs(phba);
11751 			break;
11752 	}
11753 
11754 	BUG_ON(atomic_read(&phba->fabric_iocb_count) == 0);
11755 
11756 	cmdiocb->cmd_cmpl = cmdiocb->fabric_cmd_cmpl;
11757 	cmdiocb->fabric_cmd_cmpl = NULL;
11758 	cmdiocb->cmd_flag &= ~LPFC_IO_FABRIC;
11759 	cmdiocb->cmd_cmpl(phba, cmdiocb, rspiocb);
11760 
11761 	atomic_dec(&phba->fabric_iocb_count);
11762 	if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
11763 		/* Post any pending iocbs to HBA */
11764 		lpfc_resume_fabric_iocbs(phba);
11765 	}
11766 }
11767 
11768 /**
11769  * lpfc_issue_fabric_iocb - Issue a fabric iocb command
11770  * @phba: pointer to lpfc hba data structure.
11771  * @iocb: pointer to lpfc command iocb data structure.
11772  *
11773  * This routine is used as the top-level API for issuing a fabric iocb command
11774  * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
11775  * function makes sure that only one fabric bound iocb will be outstanding at
11776  * any given time. As such, this function will first check to see whether there
11777  * is already an outstanding fabric iocb on the wire. If so, it will put the
11778  * newly issued iocb onto the driver internal fabric iocb list, waiting to be
11779  * issued later. Otherwise, it will issue the iocb on the wire and update the
11780  * fabric iocb count it indicate that there is one fabric iocb on the wire.
11781  *
11782  * Note, this implementation has a potential sending out fabric IOCBs out of
11783  * order. The problem is caused by the construction of the "ready" boolen does
11784  * not include the condition that the internal fabric IOCB list is empty. As
11785  * such, it is possible a fabric IOCB issued by this routine might be "jump"
11786  * ahead of the fabric IOCBs in the internal list.
11787  *
11788  * Return code
11789  *   IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
11790  *   IOCB_ERROR - failed to issue fabric iocb
11791  **/
11792 static int
lpfc_issue_fabric_iocb(struct lpfc_hba * phba,struct lpfc_iocbq * iocb)11793 lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
11794 {
11795 	unsigned long iflags;
11796 	int ready;
11797 	int ret;
11798 
11799 	BUG_ON(atomic_read(&phba->fabric_iocb_count) > 1);
11800 
11801 	spin_lock_irqsave(&phba->hbalock, iflags);
11802 	ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
11803 		!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11804 
11805 	if (ready)
11806 		/* Increment fabric iocb count to hold the position */
11807 		atomic_inc(&phba->fabric_iocb_count);
11808 	spin_unlock_irqrestore(&phba->hbalock, iflags);
11809 	if (ready) {
11810 		iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
11811 		iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
11812 		iocb->cmd_flag |= LPFC_IO_FABRIC;
11813 
11814 		lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11815 				      "Fabric sched2:   ste:x%x",
11816 				      iocb->vport->port_state, 0, 0);
11817 
11818 		ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11819 
11820 		if (ret == IOCB_ERROR) {
11821 			iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
11822 			iocb->fabric_cmd_cmpl = NULL;
11823 			iocb->cmd_flag &= ~LPFC_IO_FABRIC;
11824 			atomic_dec(&phba->fabric_iocb_count);
11825 		}
11826 	} else {
11827 		spin_lock_irqsave(&phba->hbalock, iflags);
11828 		list_add_tail(&iocb->list, &phba->fabric_iocb_list);
11829 		spin_unlock_irqrestore(&phba->hbalock, iflags);
11830 		ret = IOCB_SUCCESS;
11831 	}
11832 	return ret;
11833 }
11834 
11835 /**
11836  * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
11837  * @vport: pointer to a virtual N_Port data structure.
11838  *
11839  * This routine aborts all the IOCBs associated with a @vport from the
11840  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11841  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11842  * list, removes each IOCB associated with the @vport off the list, set the
11843  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11844  * associated with the IOCB.
11845  **/
lpfc_fabric_abort_vport(struct lpfc_vport * vport)11846 static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
11847 {
11848 	LIST_HEAD(completions);
11849 	struct lpfc_hba  *phba = vport->phba;
11850 	struct lpfc_iocbq *tmp_iocb, *piocb;
11851 
11852 	spin_lock_irq(&phba->hbalock);
11853 	list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11854 				 list) {
11855 
11856 		if (piocb->vport != vport)
11857 			continue;
11858 
11859 		list_move_tail(&piocb->list, &completions);
11860 	}
11861 	spin_unlock_irq(&phba->hbalock);
11862 
11863 	/* Cancel all the IOCBs from the completions list */
11864 	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11865 			      IOERR_SLI_ABORTED);
11866 }
11867 
11868 /**
11869  * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
11870  * @ndlp: pointer to a node-list data structure.
11871  *
11872  * This routine aborts all the IOCBs associated with an @ndlp from the
11873  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11874  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11875  * list, removes each IOCB associated with the @ndlp off the list, set the
11876  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11877  * associated with the IOCB.
11878  **/
lpfc_fabric_abort_nport(struct lpfc_nodelist * ndlp)11879 void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
11880 {
11881 	LIST_HEAD(completions);
11882 	struct lpfc_hba  *phba = ndlp->phba;
11883 	struct lpfc_iocbq *tmp_iocb, *piocb;
11884 	struct lpfc_sli_ring *pring;
11885 
11886 	pring = lpfc_phba_elsring(phba);
11887 
11888 	if (unlikely(!pring))
11889 		return;
11890 
11891 	spin_lock_irq(&phba->hbalock);
11892 	list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11893 				 list) {
11894 		if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {
11895 
11896 			list_move_tail(&piocb->list, &completions);
11897 		}
11898 	}
11899 	spin_unlock_irq(&phba->hbalock);
11900 
11901 	/* Cancel all the IOCBs from the completions list */
11902 	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11903 			      IOERR_SLI_ABORTED);
11904 }
11905 
11906 /**
11907  * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
11908  * @phba: pointer to lpfc hba data structure.
11909  *
11910  * This routine aborts all the IOCBs currently on the driver internal
11911  * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
11912  * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
11913  * list, removes IOCBs off the list, set the status field to
11914  * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
11915  * the IOCB.
11916  **/
lpfc_fabric_abort_hba(struct lpfc_hba * phba)11917 void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
11918 {
11919 	LIST_HEAD(completions);
11920 
11921 	spin_lock_irq(&phba->hbalock);
11922 	list_splice_init(&phba->fabric_iocb_list, &completions);
11923 	spin_unlock_irq(&phba->hbalock);
11924 
11925 	/* Cancel all the IOCBs from the completions list */
11926 	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11927 			      IOERR_SLI_ABORTED);
11928 }
11929 
11930 /**
11931  * lpfc_sli4_vport_delete_els_xri_aborted -Remove all ndlp references for vport
11932  * @vport: pointer to lpfc vport data structure.
11933  *
11934  * This routine is invoked by the vport cleanup for deletions and the cleanup
11935  * for an ndlp on removal.
11936  **/
11937 void
lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport * vport)11938 lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport *vport)
11939 {
11940 	struct lpfc_hba *phba = vport->phba;
11941 	struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11942 	struct lpfc_nodelist *ndlp = NULL;
11943 	unsigned long iflag = 0;
11944 
11945 	spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
11946 	list_for_each_entry_safe(sglq_entry, sglq_next,
11947 			&phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
11948 		if (sglq_entry->ndlp && sglq_entry->ndlp->vport == vport) {
11949 			lpfc_nlp_put(sglq_entry->ndlp);
11950 			ndlp = sglq_entry->ndlp;
11951 			sglq_entry->ndlp = NULL;
11952 
11953 			/* If the xri on the abts_els_sgl list is for the Fport
11954 			 * node and the vport is unloading, the xri aborted wcqe
11955 			 * likely isn't coming back.  Just release the sgl.
11956 			 */
11957 			if (test_bit(FC_UNLOADING, &vport->load_flag) &&
11958 			    ndlp->nlp_DID == Fabric_DID) {
11959 				list_del(&sglq_entry->list);
11960 				sglq_entry->state = SGL_FREED;
11961 				list_add_tail(&sglq_entry->list,
11962 					&phba->sli4_hba.lpfc_els_sgl_list);
11963 			}
11964 		}
11965 	}
11966 	spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
11967 	return;
11968 }
11969 
11970 /**
11971  * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort
11972  * @phba: pointer to lpfc hba data structure.
11973  * @axri: pointer to the els xri abort wcqe structure.
11974  *
11975  * This routine is invoked by the worker thread to process a SLI4 slow-path
11976  * ELS aborted xri.
11977  **/
11978 void
lpfc_sli4_els_xri_aborted(struct lpfc_hba * phba,struct sli4_wcqe_xri_aborted * axri)11979 lpfc_sli4_els_xri_aborted(struct lpfc_hba *phba,
11980 			  struct sli4_wcqe_xri_aborted *axri)
11981 {
11982 	uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
11983 	uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
11984 	uint16_t lxri = 0;
11985 
11986 	struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11987 	unsigned long iflag = 0;
11988 	struct lpfc_nodelist *ndlp;
11989 	struct lpfc_sli_ring *pring;
11990 
11991 	pring = lpfc_phba_elsring(phba);
11992 
11993 	spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
11994 	list_for_each_entry_safe(sglq_entry, sglq_next,
11995 			&phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
11996 		if (sglq_entry->sli4_xritag == xri) {
11997 			list_del(&sglq_entry->list);
11998 			ndlp = sglq_entry->ndlp;
11999 			sglq_entry->ndlp = NULL;
12000 			list_add_tail(&sglq_entry->list,
12001 				&phba->sli4_hba.lpfc_els_sgl_list);
12002 			sglq_entry->state = SGL_FREED;
12003 			spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock,
12004 					       iflag);
12005 
12006 			if (ndlp) {
12007 				lpfc_set_rrq_active(phba, ndlp,
12008 					sglq_entry->sli4_lxritag,
12009 					rxid, 1);
12010 				lpfc_nlp_put(ndlp);
12011 			}
12012 
12013 			/* Check if TXQ queue needs to be serviced */
12014 			if (pring && !list_empty(&pring->txq))
12015 				lpfc_worker_wake_up(phba);
12016 			return;
12017 		}
12018 	}
12019 	spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
12020 	lxri = lpfc_sli4_xri_inrange(phba, xri);
12021 	if (lxri == NO_XRI)
12022 		return;
12023 
12024 	spin_lock_irqsave(&phba->hbalock, iflag);
12025 	sglq_entry = __lpfc_get_active_sglq(phba, lxri);
12026 	if (!sglq_entry || (sglq_entry->sli4_xritag != xri)) {
12027 		spin_unlock_irqrestore(&phba->hbalock, iflag);
12028 		return;
12029 	}
12030 	sglq_entry->state = SGL_XRI_ABORTED;
12031 	spin_unlock_irqrestore(&phba->hbalock, iflag);
12032 	return;
12033 }
12034 
12035 /* lpfc_sli_abts_recover_port - Recover a port that failed a BLS_ABORT req.
12036  * @vport: pointer to virtual port object.
12037  * @ndlp: nodelist pointer for the impacted node.
12038  *
12039  * The driver calls this routine in response to an SLI4 XRI ABORT CQE
12040  * or an SLI3 ASYNC_STATUS_CN event from the port.  For either event,
12041  * the driver is required to send a LOGO to the remote node before it
12042  * attempts to recover its login to the remote node.
12043  */
12044 void
lpfc_sli_abts_recover_port(struct lpfc_vport * vport,struct lpfc_nodelist * ndlp)12045 lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
12046 			   struct lpfc_nodelist *ndlp)
12047 {
12048 	struct Scsi_Host *shost;
12049 	struct lpfc_hba *phba;
12050 	unsigned long flags = 0;
12051 
12052 	shost = lpfc_shost_from_vport(vport);
12053 	phba = vport->phba;
12054 	if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
12055 		lpfc_printf_log(phba, KERN_INFO,
12056 				LOG_SLI, "3093 No rport recovery needed. "
12057 				"rport in state 0x%x\n", ndlp->nlp_state);
12058 		return;
12059 	}
12060 	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
12061 			"3094 Start rport recovery on shost id 0x%x "
12062 			"fc_id 0x%06x vpi 0x%x rpi 0x%x state 0x%x "
12063 			"flag 0x%lx\n",
12064 			shost->host_no, ndlp->nlp_DID,
12065 			vport->vpi, ndlp->nlp_rpi, ndlp->nlp_state,
12066 			ndlp->nlp_flag);
12067 	/*
12068 	 * The rport is not responding.  Remove the FCP-2 flag to prevent
12069 	 * an ADISC in the follow-up recovery code.
12070 	 */
12071 	spin_lock_irqsave(&ndlp->lock, flags);
12072 	ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
12073 	spin_unlock_irqrestore(&ndlp->lock, flags);
12074 	set_bit(NLP_ISSUE_LOGO, &ndlp->nlp_flag);
12075 	lpfc_unreg_rpi(vport, ndlp);
12076 }
12077 
lpfc_init_cs_ctl_bitmap(struct lpfc_vport * vport)12078 static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport)
12079 {
12080 	bitmap_zero(vport->vmid_priority_range, LPFC_VMID_MAX_PRIORITY_RANGE);
12081 }
12082 
12083 static void
lpfc_vmid_set_cs_ctl_range(struct lpfc_vport * vport,u32 min,u32 max)12084 lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max)
12085 {
12086 	u32 i;
12087 
12088 	if ((min > max) || (max > LPFC_VMID_MAX_PRIORITY_RANGE))
12089 		return;
12090 
12091 	for (i = min; i <= max; i++)
12092 		set_bit(i, vport->vmid_priority_range);
12093 }
12094 
lpfc_vmid_put_cs_ctl(struct lpfc_vport * vport,u32 ctcl_vmid)12095 static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid)
12096 {
12097 	set_bit(ctcl_vmid, vport->vmid_priority_range);
12098 }
12099 
lpfc_vmid_get_cs_ctl(struct lpfc_vport * vport)12100 u32 lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport)
12101 {
12102 	u32 i;
12103 
12104 	i = find_first_bit(vport->vmid_priority_range,
12105 			   LPFC_VMID_MAX_PRIORITY_RANGE);
12106 
12107 	if (i == LPFC_VMID_MAX_PRIORITY_RANGE)
12108 		return 0;
12109 
12110 	clear_bit(i, vport->vmid_priority_range);
12111 	return i;
12112 }
12113 
12114 #define MAX_PRIORITY_DESC	255
12115 
12116 static void
lpfc_cmpl_els_qfpa(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocb,struct lpfc_iocbq * rspiocb)12117 lpfc_cmpl_els_qfpa(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
12118 		   struct lpfc_iocbq *rspiocb)
12119 {
12120 	struct lpfc_vport *vport = cmdiocb->vport;
12121 	struct priority_range_desc *desc;
12122 	struct lpfc_dmabuf *prsp = NULL;
12123 	struct lpfc_vmid_priority_range *vmid_range = NULL;
12124 	u32 *data;
12125 	struct lpfc_dmabuf *dmabuf = cmdiocb->cmd_dmabuf;
12126 	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
12127 	u32 ulp_word4 = get_job_word4(phba, rspiocb);
12128 	u8 *pcmd, max_desc;
12129 	u32 len, i;
12130 	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
12131 
12132 	prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
12133 	if (!prsp)
12134 		goto out;
12135 
12136 	pcmd = prsp->virt;
12137 	data = (u32 *)pcmd;
12138 	if (data[0] == ELS_CMD_LS_RJT) {
12139 		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12140 				 "3277 QFPA LS_RJT x%x  x%x\n",
12141 				 data[0], data[1]);
12142 		goto out;
12143 	}
12144 	if (ulp_status) {
12145 		lpfc_printf_vlog(vport, KERN_ERR, LOG_SLI,
12146 				 "6529 QFPA failed with status x%x  x%x\n",
12147 				 ulp_status, ulp_word4);
12148 		goto out;
12149 	}
12150 
12151 	if (!vport->qfpa_res) {
12152 		max_desc = FCELSSIZE / sizeof(*vport->qfpa_res);
12153 		vport->qfpa_res = kcalloc(max_desc, sizeof(*vport->qfpa_res),
12154 					  GFP_KERNEL);
12155 		if (!vport->qfpa_res)
12156 			goto out;
12157 	}
12158 
12159 	len = *((u32 *)(pcmd + 4));
12160 	len = be32_to_cpu(len);
12161 	memcpy(vport->qfpa_res, pcmd, len + 8);
12162 	len = len / LPFC_PRIORITY_RANGE_DESC_SIZE;
12163 
12164 	desc = (struct priority_range_desc *)(pcmd + 8);
12165 	vmid_range = vport->vmid_priority.vmid_range;
12166 	if (!vmid_range) {
12167 		vmid_range = kcalloc(MAX_PRIORITY_DESC, sizeof(*vmid_range),
12168 				     GFP_KERNEL);
12169 		if (!vmid_range) {
12170 			kfree(vport->qfpa_res);
12171 			goto out;
12172 		}
12173 		vport->vmid_priority.vmid_range = vmid_range;
12174 	}
12175 	vport->vmid_priority.num_descriptors = len;
12176 
12177 	for (i = 0; i < len; i++, vmid_range++, desc++) {
12178 		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
12179 				 "6539 vmid values low=%d, high=%d, qos=%d, "
12180 				 "local ve id=%d\n", desc->lo_range,
12181 				 desc->hi_range, desc->qos_priority,
12182 				 desc->local_ve_id);
12183 
12184 		vmid_range->low = desc->lo_range << 1;
12185 		if (desc->local_ve_id == QFPA_ODD_ONLY)
12186 			vmid_range->low++;
12187 		if (desc->qos_priority)
12188 			vport->vmid_flag |= LPFC_VMID_QOS_ENABLED;
12189 		vmid_range->qos = desc->qos_priority;
12190 
12191 		vmid_range->high = desc->hi_range << 1;
12192 		if ((desc->local_ve_id == QFPA_ODD_ONLY) ||
12193 		    (desc->local_ve_id == QFPA_EVEN_ODD))
12194 			vmid_range->high++;
12195 	}
12196 	lpfc_init_cs_ctl_bitmap(vport);
12197 	for (i = 0; i < vport->vmid_priority.num_descriptors; i++) {
12198 		lpfc_vmid_set_cs_ctl_range(vport,
12199 				vport->vmid_priority.vmid_range[i].low,
12200 				vport->vmid_priority.vmid_range[i].high);
12201 	}
12202 
12203 	vport->vmid_flag |= LPFC_VMID_QFPA_CMPL;
12204  out:
12205 	lpfc_els_free_iocb(phba, cmdiocb);
12206 	lpfc_nlp_put(ndlp);
12207 }
12208 
lpfc_issue_els_qfpa(struct lpfc_vport * vport)12209 int lpfc_issue_els_qfpa(struct lpfc_vport *vport)
12210 {
12211 	struct lpfc_hba *phba = vport->phba;
12212 	struct lpfc_nodelist *ndlp;
12213 	struct lpfc_iocbq *elsiocb;
12214 	u8 *pcmd;
12215 	int ret;
12216 
12217 	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
12218 	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12219 		return -ENXIO;
12220 
12221 	elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_QFPA_SIZE, 2, ndlp,
12222 				     ndlp->nlp_DID, ELS_CMD_QFPA);
12223 	if (!elsiocb)
12224 		return -ENOMEM;
12225 
12226 	pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
12227 
12228 	*((u32 *)(pcmd)) = ELS_CMD_QFPA;
12229 	pcmd += 4;
12230 
12231 	elsiocb->cmd_cmpl = lpfc_cmpl_els_qfpa;
12232 
12233 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
12234 	if (!elsiocb->ndlp) {
12235 		lpfc_els_free_iocb(vport->phba, elsiocb);
12236 		return -ENXIO;
12237 	}
12238 
12239 	ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 2);
12240 	if (ret != IOCB_SUCCESS) {
12241 		lpfc_els_free_iocb(phba, elsiocb);
12242 		lpfc_nlp_put(ndlp);
12243 		return -EIO;
12244 	}
12245 	vport->vmid_flag &= ~LPFC_VMID_QOS_ENABLED;
12246 	return 0;
12247 }
12248 
12249 int
lpfc_vmid_uvem(struct lpfc_vport * vport,struct lpfc_vmid * vmid,bool instantiated)12250 lpfc_vmid_uvem(struct lpfc_vport *vport,
12251 	       struct lpfc_vmid *vmid, bool instantiated)
12252 {
12253 	struct lpfc_vem_id_desc *vem_id_desc;
12254 	struct lpfc_nodelist *ndlp;
12255 	struct lpfc_iocbq *elsiocb;
12256 	struct instantiated_ve_desc *inst_desc;
12257 	struct lpfc_vmid_context *vmid_context;
12258 	u8 *pcmd;
12259 	u32 *len;
12260 	int ret = 0;
12261 
12262 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
12263 	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12264 		return -ENXIO;
12265 
12266 	vmid_context = kmalloc(sizeof(*vmid_context), GFP_KERNEL);
12267 	if (!vmid_context)
12268 		return -ENOMEM;
12269 	elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_UVEM_SIZE, 2,
12270 				     ndlp, Fabric_DID, ELS_CMD_UVEM);
12271 	if (!elsiocb)
12272 		goto out;
12273 
12274 	lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
12275 			 "3427 Host vmid %s %d\n",
12276 			 vmid->host_vmid, instantiated);
12277 	vmid_context->vmp = vmid;
12278 	vmid_context->nlp = ndlp;
12279 	vmid_context->instantiated = instantiated;
12280 	elsiocb->vmid_tag.vmid_context = vmid_context;
12281 	pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
12282 
12283 	if (!memchr_inv(vport->lpfc_vmid_host_uuid, 0,
12284 			sizeof(vport->lpfc_vmid_host_uuid)))
12285 		memcpy(vport->lpfc_vmid_host_uuid, vmid->host_vmid,
12286 		       sizeof(vport->lpfc_vmid_host_uuid));
12287 
12288 	*((u32 *)(pcmd)) = ELS_CMD_UVEM;
12289 	len = (u32 *)(pcmd + 4);
12290 	*len = cpu_to_be32(LPFC_UVEM_SIZE - 8);
12291 
12292 	vem_id_desc = (struct lpfc_vem_id_desc *)(pcmd + 8);
12293 	vem_id_desc->tag = be32_to_cpu(VEM_ID_DESC_TAG);
12294 	vem_id_desc->length = be32_to_cpu(LPFC_UVEM_VEM_ID_DESC_SIZE);
12295 	memcpy(vem_id_desc->vem_id, vport->lpfc_vmid_host_uuid,
12296 	       sizeof(vem_id_desc->vem_id));
12297 
12298 	inst_desc = (struct instantiated_ve_desc *)(pcmd + 32);
12299 	inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
12300 	inst_desc->length = be32_to_cpu(LPFC_UVEM_VE_MAP_DESC_SIZE);
12301 	memcpy(inst_desc->global_vem_id, vmid->host_vmid,
12302 	       sizeof(inst_desc->global_vem_id));
12303 
12304 	bf_set(lpfc_instantiated_nport_id, inst_desc, vport->fc_myDID);
12305 	bf_set(lpfc_instantiated_local_id, inst_desc,
12306 	       vmid->un.cs_ctl_vmid);
12307 	if (instantiated) {
12308 		inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
12309 	} else {
12310 		inst_desc->tag = be32_to_cpu(DEINSTANTIATED_VE_DESC_TAG);
12311 		lpfc_vmid_put_cs_ctl(vport, vmid->un.cs_ctl_vmid);
12312 	}
12313 	inst_desc->word6 = cpu_to_be32(inst_desc->word6);
12314 
12315 	elsiocb->cmd_cmpl = lpfc_cmpl_els_uvem;
12316 
12317 	elsiocb->ndlp = lpfc_nlp_get(ndlp);
12318 	if (!elsiocb->ndlp) {
12319 		lpfc_els_free_iocb(vport->phba, elsiocb);
12320 		goto out;
12321 	}
12322 
12323 	ret = lpfc_sli_issue_iocb(vport->phba, LPFC_ELS_RING, elsiocb, 0);
12324 	if (ret != IOCB_SUCCESS) {
12325 		lpfc_els_free_iocb(vport->phba, elsiocb);
12326 		lpfc_nlp_put(ndlp);
12327 		goto out;
12328 	}
12329 
12330 	return 0;
12331  out:
12332 	kfree(vmid_context);
12333 	return -EIO;
12334 }
12335 
12336 static void
lpfc_cmpl_els_uvem(struct lpfc_hba * phba,struct lpfc_iocbq * icmdiocb,struct lpfc_iocbq * rspiocb)12337 lpfc_cmpl_els_uvem(struct lpfc_hba *phba, struct lpfc_iocbq *icmdiocb,
12338 		   struct lpfc_iocbq *rspiocb)
12339 {
12340 	struct lpfc_vport *vport = icmdiocb->vport;
12341 	struct lpfc_dmabuf *prsp = NULL;
12342 	struct lpfc_vmid_context *vmid_context =
12343 	    icmdiocb->vmid_tag.vmid_context;
12344 	struct lpfc_nodelist *ndlp = icmdiocb->ndlp;
12345 	u8 *pcmd;
12346 	u32 *data;
12347 	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
12348 	u32 ulp_word4 = get_job_word4(phba, rspiocb);
12349 	struct lpfc_dmabuf *dmabuf = icmdiocb->cmd_dmabuf;
12350 	struct lpfc_vmid *vmid;
12351 
12352 	vmid = vmid_context->vmp;
12353 	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12354 		ndlp = NULL;
12355 
12356 	prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
12357 	if (!prsp)
12358 		goto out;
12359 	pcmd = prsp->virt;
12360 	data = (u32 *)pcmd;
12361 	if (data[0] == ELS_CMD_LS_RJT) {
12362 		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12363 				 "4532 UVEM LS_RJT %x %x\n", data[0], data[1]);
12364 		goto out;
12365 	}
12366 	if (ulp_status) {
12367 		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12368 				 "4533 UVEM error status %x: %x\n",
12369 				 ulp_status, ulp_word4);
12370 		goto out;
12371 	}
12372 	spin_lock(&phba->hbalock);
12373 	/* Set IN USE flag */
12374 	vport->vmid_flag |= LPFC_VMID_IN_USE;
12375 	phba->pport->vmid_flag |= LPFC_VMID_IN_USE;
12376 	spin_unlock(&phba->hbalock);
12377 
12378 	if (vmid_context->instantiated) {
12379 		write_lock(&vport->vmid_lock);
12380 		vmid->flag |= LPFC_VMID_REGISTERED;
12381 		vmid->flag &= ~LPFC_VMID_REQ_REGISTER;
12382 		write_unlock(&vport->vmid_lock);
12383 	}
12384 
12385  out:
12386 	kfree(vmid_context);
12387 	lpfc_els_free_iocb(phba, icmdiocb);
12388 	lpfc_nlp_put(ndlp);
12389 }
12390