xref: /linux/drivers/scsi/bnx2i/bnx2i_hwi.c (revision d39d0ed196aa1685bb24771e92f78633c66ac9cb)
1 /* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
2  *
3  * Copyright (c) 2006 - 2009 Broadcom Corporation
4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
5  * Copyright (c) 2007, 2008 Mike Christie
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation.
10  *
11  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
12  */
13 
14 #include <linux/gfp.h>
15 #include <scsi/scsi_tcq.h>
16 #include <scsi/libiscsi.h>
17 #include "bnx2i.h"
18 
19 /**
20  * bnx2i_get_cid_num - get cid from ep
21  * @ep: 	endpoint pointer
22  *
23  * Only applicable to 57710 family of devices
24  */
25 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
26 {
27 	u32 cid;
28 
29 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
30 		cid = ep->ep_cid;
31 	else
32 		cid = GET_CID_NUM(ep->ep_cid);
33 	return cid;
34 }
35 
36 
37 /**
38  * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
39  * @hba: 		Adapter for which adjustments is to be made
40  *
41  * Only applicable to 57710 family of devices
42  */
43 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
44 {
45 	u32 num_elements_per_pg;
46 
47 	if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
48 	    test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
49 	    test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
50 		if (!is_power_of_2(hba->max_sqes))
51 			hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
52 
53 		if (!is_power_of_2(hba->max_rqes))
54 			hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
55 	}
56 
57 	/* Adjust each queue size if the user selection does not
58 	 * yield integral num of page buffers
59 	 */
60 	/* adjust SQ */
61 	num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
62 	if (hba->max_sqes < num_elements_per_pg)
63 		hba->max_sqes = num_elements_per_pg;
64 	else if (hba->max_sqes % num_elements_per_pg)
65 		hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
66 				 ~(num_elements_per_pg - 1);
67 
68 	/* adjust CQ */
69 	num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
70 	if (hba->max_cqes < num_elements_per_pg)
71 		hba->max_cqes = num_elements_per_pg;
72 	else if (hba->max_cqes % num_elements_per_pg)
73 		hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
74 				 ~(num_elements_per_pg - 1);
75 
76 	/* adjust RQ */
77 	num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
78 	if (hba->max_rqes < num_elements_per_pg)
79 		hba->max_rqes = num_elements_per_pg;
80 	else if (hba->max_rqes % num_elements_per_pg)
81 		hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
82 				 ~(num_elements_per_pg - 1);
83 }
84 
85 
86 /**
87  * bnx2i_get_link_state - get network interface link state
88  * @hba:	adapter instance pointer
89  *
90  * updates adapter structure flag based on netdev state
91  */
92 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
93 {
94 	if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
95 		set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
96 	else
97 		clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
98 }
99 
100 
101 /**
102  * bnx2i_iscsi_license_error - displays iscsi license related error message
103  * @hba:		adapter instance pointer
104  * @error_code:		error classification
105  *
106  * Puts out an error log when driver is unable to offload iscsi connection
107  *	due to license restrictions
108  */
109 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
110 {
111 	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
112 		/* iSCSI offload not supported on this device */
113 		printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
114 				hba->netdev->name);
115 	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
116 		/* iSCSI offload not supported on this LOM device */
117 		printk(KERN_ERR "bnx2i: LOM is not enable to "
118 				"offload iSCSI connections, dev=%s\n",
119 				hba->netdev->name);
120 	set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
121 }
122 
123 
124 /**
125  * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
126  * @ep:		endpoint (transport indentifier) structure
127  * @action:	action, ARM or DISARM. For now only ARM_CQE is used
128  *
129  * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
130  *	the driver. EQ event is generated CQ index is hit or at least 1 CQ is
131  *	outstanding and on chip timer expires
132  */
133 void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
134 {
135 	struct bnx2i_5771x_cq_db *cq_db;
136 	u16 cq_index;
137 	u16 next_index;
138 	u32 num_active_cmds;
139 
140 
141 	/* Coalesce CQ entries only on 10G devices */
142 	if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
143 		return;
144 
145 	/* Do not update CQ DB multiple times before firmware writes
146 	 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
147 	 * interrupts and other unwanted results
148 	 */
149 	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
150 	if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
151 		return;
152 
153 	if (action == CNIC_ARM_CQE) {
154 		num_active_cmds = ep->num_active_cmds;
155 		if (num_active_cmds <= event_coal_min)
156 			next_index = 1;
157 		else
158 			next_index = event_coal_min +
159 				(num_active_cmds - event_coal_min) / event_coal_div;
160 		if (!next_index)
161 			next_index = 1;
162 		cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
163 		if (cq_index > ep->qp.cqe_size * 2)
164 			cq_index -= ep->qp.cqe_size * 2;
165 		if (!cq_index)
166 			cq_index = 1;
167 
168 		cq_db->sqn[0] = cq_index;
169 	}
170 }
171 
172 
173 /**
174  * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
175  * @conn:		iscsi connection on which RQ event occured
176  * @ptr:		driver buffer to which RQ buffer contents is to
177  *			be copied
178  * @len:		length of valid data inside RQ buf
179  *
180  * Copies RQ buffer contents from shared (DMA'able) memory region to
181  *	driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
182  *	scsi sense info
183  */
184 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
185 {
186 	if (!bnx2i_conn->ep->qp.rqe_left)
187 		return;
188 
189 	bnx2i_conn->ep->qp.rqe_left--;
190 	memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
191 	if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
192 		bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
193 		bnx2i_conn->ep->qp.rq_cons_idx = 0;
194 	} else {
195 		bnx2i_conn->ep->qp.rq_cons_qe++;
196 		bnx2i_conn->ep->qp.rq_cons_idx++;
197 	}
198 }
199 
200 
201 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
202 {
203 	struct bnx2i_5771x_dbell dbell;
204 	u32 msg;
205 
206 	memset(&dbell, 0, sizeof(dbell));
207 	dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
208 			      B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
209 	msg = *((u32 *)&dbell);
210 	/* TODO : get doorbell register mapping */
211 	writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
212 }
213 
214 
215 /**
216  * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
217  * @conn:	iscsi connection on which event to post
218  * @count:	number of RQ buffer being posted to chip
219  *
220  * No need to ring hardware doorbell for 57710 family of devices
221  */
222 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
223 {
224 	struct bnx2i_5771x_sq_rq_db *rq_db;
225 	u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
226 	struct bnx2i_endpoint *ep = bnx2i_conn->ep;
227 
228 	ep->qp.rqe_left += count;
229 	ep->qp.rq_prod_idx &= 0x7FFF;
230 	ep->qp.rq_prod_idx += count;
231 
232 	if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
233 		ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
234 		if (!hi_bit)
235 			ep->qp.rq_prod_idx |= 0x8000;
236 	} else
237 		ep->qp.rq_prod_idx |= hi_bit;
238 
239 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
240 		rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
241 		rq_db->prod_idx = ep->qp.rq_prod_idx;
242 		/* no need to ring hardware doorbell for 57710 */
243 	} else {
244 		writew(ep->qp.rq_prod_idx,
245 		       ep->qp.ctx_base + CNIC_RECV_DOORBELL);
246 	}
247 	mmiowb();
248 }
249 
250 
251 /**
252  * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
253  * @conn: 		iscsi connection to which new SQ entries belong
254  * @count: 		number of SQ WQEs to post
255  *
256  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
257  *	of devices. For 5706/5708/5709 new SQ WQE count is written into the
258  *	doorbell register
259  */
260 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
261 {
262 	struct bnx2i_5771x_sq_rq_db *sq_db;
263 	struct bnx2i_endpoint *ep = bnx2i_conn->ep;
264 
265 	ep->num_active_cmds++;
266 	wmb();	/* flush SQ WQE memory before the doorbell is rung */
267 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
268 		sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
269 		sq_db->prod_idx = ep->qp.sq_prod_idx;
270 		bnx2i_ring_577xx_doorbell(bnx2i_conn);
271 	} else
272 		writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
273 
274 	mmiowb(); /* flush posted PCI writes */
275 }
276 
277 
278 /**
279  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
280  * @conn:	iscsi connection to which new SQ entries belong
281  * @count:	number of SQ WQEs to post
282  *
283  * this routine will update SQ driver parameters and ring the doorbell
284  */
285 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
286 					      int count)
287 {
288 	int tmp_cnt;
289 
290 	if (count == 1) {
291 		if (bnx2i_conn->ep->qp.sq_prod_qe ==
292 		    bnx2i_conn->ep->qp.sq_last_qe)
293 			bnx2i_conn->ep->qp.sq_prod_qe =
294 						bnx2i_conn->ep->qp.sq_first_qe;
295 		else
296 			bnx2i_conn->ep->qp.sq_prod_qe++;
297 	} else {
298 		if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
299 		    bnx2i_conn->ep->qp.sq_last_qe)
300 			bnx2i_conn->ep->qp.sq_prod_qe += count;
301 		else {
302 			tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
303 				bnx2i_conn->ep->qp.sq_prod_qe;
304 			bnx2i_conn->ep->qp.sq_prod_qe =
305 				&bnx2i_conn->ep->qp.sq_first_qe[count -
306 								(tmp_cnt + 1)];
307 		}
308 	}
309 	bnx2i_conn->ep->qp.sq_prod_idx += count;
310 	/* Ring the doorbell */
311 	bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
312 }
313 
314 
315 /**
316  * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
317  * @conn:	iscsi connection
318  * @cmd:	driver command structure which is requesting
319  *		a WQE to sent to chip for further processing
320  *
321  * prepare and post an iSCSI Login request WQE to CNIC firmware
322  */
323 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
324 			   struct iscsi_task *task)
325 {
326 	struct bnx2i_cmd *bnx2i_cmd;
327 	struct bnx2i_login_request *login_wqe;
328 	struct iscsi_login *login_hdr;
329 	u32 dword;
330 
331 	bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
332 	login_hdr = (struct iscsi_login *)task->hdr;
333 	login_wqe = (struct bnx2i_login_request *)
334 						bnx2i_conn->ep->qp.sq_prod_qe;
335 
336 	login_wqe->op_code = login_hdr->opcode;
337 	login_wqe->op_attr = login_hdr->flags;
338 	login_wqe->version_max = login_hdr->max_version;
339 	login_wqe->version_min = login_hdr->min_version;
340 	login_wqe->data_length = ntoh24(login_hdr->dlength);
341 	login_wqe->isid_lo = *((u32 *) login_hdr->isid);
342 	login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
343 	login_wqe->tsih = login_hdr->tsih;
344 	login_wqe->itt = task->itt |
345 		(ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
346 	login_wqe->cid = login_hdr->cid;
347 
348 	login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
349 	login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
350 	login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
351 
352 	login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
353 	login_wqe->resp_bd_list_addr_hi =
354 		(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
355 
356 	dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
357 		 (bnx2i_conn->gen_pdu.resp_buf_size <<
358 		  ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
359 	login_wqe->resp_buffer = dword;
360 	login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
361 	login_wqe->bd_list_addr_hi =
362 		(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
363 	login_wqe->num_bds = 1;
364 	login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
365 
366 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
367 	return 0;
368 }
369 
370 /**
371  * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
372  * @conn:	iscsi connection
373  * @mtask:	driver command structure which is requesting
374  *		a WQE to sent to chip for further processing
375  *
376  * prepare and post an iSCSI Login request WQE to CNIC firmware
377  */
378 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
379 			 struct iscsi_task *mtask)
380 {
381 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
382 	struct iscsi_tm *tmfabort_hdr;
383 	struct scsi_cmnd *ref_sc;
384 	struct iscsi_task *ctask;
385 	struct bnx2i_cmd *bnx2i_cmd;
386 	struct bnx2i_tmf_request *tmfabort_wqe;
387 	u32 dword;
388 	u32 scsi_lun[2];
389 
390 	bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
391 	tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
392 	tmfabort_wqe = (struct bnx2i_tmf_request *)
393 						bnx2i_conn->ep->qp.sq_prod_qe;
394 
395 	tmfabort_wqe->op_code = tmfabort_hdr->opcode;
396 	tmfabort_wqe->op_attr = 0;
397 	tmfabort_wqe->op_attr =
398 		ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
399 
400 	tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
401 	tmfabort_wqe->reserved2 = 0;
402 	tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
403 
404 	ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
405 	if (!ctask || !ctask->sc)
406 		/*
407 		 * the iscsi layer must have completed the cmd while this
408 		 * was starting up.
409 		 *
410 		 * Note: In the case of a SCSI cmd timeout, the task's sc
411 		 *       is still active; hence ctask->sc != 0
412 		 *       In this case, the task must be aborted
413 		 */
414 		return 0;
415 
416 	ref_sc = ctask->sc;
417 
418 	/* Retrieve LUN directly from the ref_sc */
419 	int_to_scsilun(ref_sc->device->lun, (struct scsi_lun *) scsi_lun);
420 	tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
421 	tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
422 
423 	if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
424 		dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
425 	else
426 		dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
427 	tmfabort_wqe->ref_itt = (dword | (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
428 	tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
429 
430 	tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
431 	tmfabort_wqe->bd_list_addr_hi = (u32)
432 				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
433 	tmfabort_wqe->num_bds = 1;
434 	tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
435 
436 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
437 	return 0;
438 }
439 
440 /**
441  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
442  * @conn:	iscsi connection
443  * @cmd:	driver command structure which is requesting
444  *		a WQE to sent to chip for further processing
445  *
446  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
447  */
448 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
449 			     struct bnx2i_cmd *cmd)
450 {
451 	struct bnx2i_cmd_request *scsi_cmd_wqe;
452 
453 	scsi_cmd_wqe = (struct bnx2i_cmd_request *)
454 						bnx2i_conn->ep->qp.sq_prod_qe;
455 	memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
456 	scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
457 
458 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
459 	return 0;
460 }
461 
462 /**
463  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
464  * @conn:		iscsi connection
465  * @cmd:		driver command structure which is requesting
466  *			a WQE to sent to chip for further processing
467  * @ttt:		TTT to be used when building pdu header
468  * @datap:		payload buffer pointer
469  * @data_len:		payload data length
470  * @unsol:		indicated whether nopout pdu is unsolicited pdu or
471  *			in response to target's NOPIN w/ TTT != FFFFFFFF
472  *
473  * prepare and post a nopout request WQE to CNIC firmware
474  */
475 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
476 			    struct iscsi_task *task, u32 ttt,
477 			    char *datap, int data_len, int unsol)
478 {
479 	struct bnx2i_endpoint *ep = bnx2i_conn->ep;
480 	struct bnx2i_cmd *bnx2i_cmd;
481 	struct bnx2i_nop_out_request *nopout_wqe;
482 	struct iscsi_nopout *nopout_hdr;
483 
484 	bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
485 	nopout_hdr = (struct iscsi_nopout *)task->hdr;
486 	nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
487 	nopout_wqe->op_code = nopout_hdr->opcode;
488 	nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
489 	memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
490 
491 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
492 		u32 tmp = nopout_hdr->lun[0];
493 		/* 57710 requires LUN field to be swapped */
494 		nopout_hdr->lun[0] = nopout_hdr->lun[1];
495 		nopout_hdr->lun[1] = tmp;
496 	}
497 
498 	nopout_wqe->itt = ((u16)task->itt |
499 			   (ISCSI_TASK_TYPE_MPATH <<
500 			    ISCSI_TMF_REQUEST_TYPE_SHIFT));
501 	nopout_wqe->ttt = ttt;
502 	nopout_wqe->flags = 0;
503 	if (!unsol)
504 		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
505 	else if (nopout_hdr->itt == RESERVED_ITT)
506 		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
507 
508 	nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
509 	nopout_wqe->data_length = data_len;
510 	if (data_len) {
511 		/* handle payload data, not required in first release */
512 		printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
513 	} else {
514 		nopout_wqe->bd_list_addr_lo = (u32)
515 					bnx2i_conn->hba->mp_bd_dma;
516 		nopout_wqe->bd_list_addr_hi =
517 			(u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
518 		nopout_wqe->num_bds = 1;
519 	}
520 	nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
521 
522 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
523 	return 0;
524 }
525 
526 
527 /**
528  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
529  * @conn:	iscsi connection
530  * @cmd:	driver command structure which is requesting
531  *		a WQE to sent to chip for further processing
532  *
533  * prepare and post logout request WQE to CNIC firmware
534  */
535 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
536 			    struct iscsi_task *task)
537 {
538 	struct bnx2i_cmd *bnx2i_cmd;
539 	struct bnx2i_logout_request *logout_wqe;
540 	struct iscsi_logout *logout_hdr;
541 
542 	bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
543 	logout_hdr = (struct iscsi_logout *)task->hdr;
544 
545 	logout_wqe = (struct bnx2i_logout_request *)
546 						bnx2i_conn->ep->qp.sq_prod_qe;
547 	memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
548 
549 	logout_wqe->op_code = logout_hdr->opcode;
550 	logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
551 	logout_wqe->op_attr =
552 			logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
553 	logout_wqe->itt = ((u16)task->itt |
554 			   (ISCSI_TASK_TYPE_MPATH <<
555 			    ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
556 	logout_wqe->data_length = 0;
557 	logout_wqe->cid = 0;
558 
559 	logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
560 	logout_wqe->bd_list_addr_hi = (u32)
561 				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
562 	logout_wqe->num_bds = 1;
563 	logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
564 
565 	bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
566 
567 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
568 	return 0;
569 }
570 
571 
572 /**
573  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
574  * @conn:	iscsi connection which requires iscsi parameter update
575  *
576  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
577  */
578 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
579 {
580 	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
581 	struct bnx2i_hba *hba = bnx2i_conn->hba;
582 	struct kwqe *kwqe_arr[2];
583 	struct iscsi_kwqe_conn_update *update_wqe;
584 	struct iscsi_kwqe_conn_update conn_update_kwqe;
585 
586 	update_wqe = &conn_update_kwqe;
587 
588 	update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
589 	update_wqe->hdr.flags =
590 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
591 
592 	/* 5771x requires conn context id to be passed as is */
593 	if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
594 		update_wqe->context_id = bnx2i_conn->ep->ep_cid;
595 	else
596 		update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
597 	update_wqe->conn_flags = 0;
598 	if (conn->hdrdgst_en)
599 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
600 	if (conn->datadgst_en)
601 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
602 	if (conn->session->initial_r2t_en)
603 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
604 	if (conn->session->imm_data_en)
605 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
606 
607 	update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
608 	update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
609 	update_wqe->first_burst_length = conn->session->first_burst;
610 	update_wqe->max_burst_length = conn->session->max_burst;
611 	update_wqe->exp_stat_sn = conn->exp_statsn;
612 	update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
613 	update_wqe->session_error_recovery_level = conn->session->erl;
614 	iscsi_conn_printk(KERN_ALERT, conn,
615 			  "bnx2i: conn update - MBL 0x%x FBL 0x%x"
616 			  "MRDSL_I 0x%x MRDSL_T 0x%x \n",
617 			  update_wqe->max_burst_length,
618 			  update_wqe->first_burst_length,
619 			  update_wqe->max_recv_pdu_length,
620 			  update_wqe->max_send_pdu_length);
621 
622 	kwqe_arr[0] = (struct kwqe *) update_wqe;
623 	if (hba->cnic && hba->cnic->submit_kwqes)
624 		hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
625 }
626 
627 
628 /**
629  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
630  * @data:	endpoint (transport handle) structure pointer
631  *
632  * routine to handle connection offload/destroy request timeout
633  */
634 void bnx2i_ep_ofld_timer(unsigned long data)
635 {
636 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
637 
638 	if (ep->state == EP_STATE_OFLD_START) {
639 		printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
640 		ep->state = EP_STATE_OFLD_FAILED;
641 	} else if (ep->state == EP_STATE_DISCONN_START) {
642 		printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
643 		ep->state = EP_STATE_DISCONN_TIMEDOUT;
644 	} else if (ep->state == EP_STATE_CLEANUP_START) {
645 		printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
646 		ep->state = EP_STATE_CLEANUP_FAILED;
647 	}
648 
649 	wake_up_interruptible(&ep->ofld_wait);
650 }
651 
652 
653 static int bnx2i_power_of2(u32 val)
654 {
655 	u32 power = 0;
656 	if (val & (val - 1))
657 		return power;
658 	val--;
659 	while (val) {
660 		val = val >> 1;
661 		power++;
662 	}
663 	return power;
664 }
665 
666 
667 /**
668  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
669  * @hba:	adapter structure pointer
670  * @cmd:	driver command structure which is requesting
671  *		a WQE to sent to chip for further processing
672  *
673  * prepares and posts CONN_OFLD_REQ1/2 KWQE
674  */
675 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
676 {
677 	struct bnx2i_cleanup_request *cmd_cleanup;
678 
679 	cmd_cleanup =
680 		(struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
681 	memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
682 
683 	cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
684 	cmd_cleanup->itt = cmd->req.itt;
685 	cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
686 
687 	bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
688 }
689 
690 
691 /**
692  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
693  * @hba:	adapter structure pointer
694  * @ep:		endpoint (transport indentifier) structure
695  *
696  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
697  * 	iscsi connection context clean-up process
698  */
699 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
700 {
701 	struct kwqe *kwqe_arr[2];
702 	struct iscsi_kwqe_conn_destroy conn_cleanup;
703 
704 	memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
705 
706 	conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
707 	conn_cleanup.hdr.flags =
708 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
709 	/* 5771x requires conn context id to be passed as is */
710 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
711 		conn_cleanup.context_id = ep->ep_cid;
712 	else
713 		conn_cleanup.context_id = (ep->ep_cid >> 7);
714 
715 	conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
716 
717 	kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
718 	if (hba->cnic && hba->cnic->submit_kwqes)
719 		hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
720 }
721 
722 
723 /**
724  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
725  * @hba: 		adapter structure pointer
726  * @ep: 		endpoint (transport indentifier) structure
727  *
728  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
729  */
730 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
731 					  struct bnx2i_endpoint *ep)
732 {
733 	struct kwqe *kwqe_arr[2];
734 	struct iscsi_kwqe_conn_offload1 ofld_req1;
735 	struct iscsi_kwqe_conn_offload2 ofld_req2;
736 	dma_addr_t dma_addr;
737 	int num_kwqes = 2;
738 	u32 *ptbl;
739 
740 	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
741 	ofld_req1.hdr.flags =
742 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
743 
744 	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
745 
746 	dma_addr = ep->qp.sq_pgtbl_phys;
747 	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
748 	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
749 
750 	dma_addr = ep->qp.cq_pgtbl_phys;
751 	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
752 	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
753 
754 	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
755 	ofld_req2.hdr.flags =
756 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
757 
758 	dma_addr = ep->qp.rq_pgtbl_phys;
759 	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
760 	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
761 
762 	ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
763 
764 	ofld_req2.sq_first_pte.hi = *ptbl++;
765 	ofld_req2.sq_first_pte.lo = *ptbl;
766 
767 	ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
768 	ofld_req2.cq_first_pte.hi = *ptbl++;
769 	ofld_req2.cq_first_pte.lo = *ptbl;
770 
771 	kwqe_arr[0] = (struct kwqe *) &ofld_req1;
772 	kwqe_arr[1] = (struct kwqe *) &ofld_req2;
773 	ofld_req2.num_additional_wqes = 0;
774 
775 	if (hba->cnic && hba->cnic->submit_kwqes)
776 		hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
777 }
778 
779 
780 /**
781  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
782  * @hba: 		adapter structure pointer
783  * @ep: 		endpoint (transport indentifier) structure
784  *
785  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
786  */
787 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
788 					   struct bnx2i_endpoint *ep)
789 {
790 	struct kwqe *kwqe_arr[5];
791 	struct iscsi_kwqe_conn_offload1 ofld_req1;
792 	struct iscsi_kwqe_conn_offload2 ofld_req2;
793 	struct iscsi_kwqe_conn_offload3 ofld_req3[1];
794 	dma_addr_t dma_addr;
795 	int num_kwqes = 2;
796 	u32 *ptbl;
797 
798 	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
799 	ofld_req1.hdr.flags =
800 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
801 
802 	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
803 
804 	dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
805 	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
806 	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
807 
808 	dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
809 	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
810 	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
811 
812 	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
813 	ofld_req2.hdr.flags =
814 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
815 
816 	dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
817 	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
818 	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
819 
820 	ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
821 	ofld_req2.sq_first_pte.hi = *ptbl++;
822 	ofld_req2.sq_first_pte.lo = *ptbl;
823 
824 	ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
825 	ofld_req2.cq_first_pte.hi = *ptbl++;
826 	ofld_req2.cq_first_pte.lo = *ptbl;
827 
828 	kwqe_arr[0] = (struct kwqe *) &ofld_req1;
829 	kwqe_arr[1] = (struct kwqe *) &ofld_req2;
830 
831 	ofld_req2.num_additional_wqes = 1;
832 	memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
833 	ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
834 	ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
835 	ofld_req3[0].qp_first_pte[0].lo = *ptbl;
836 
837 	kwqe_arr[2] = (struct kwqe *) ofld_req3;
838 	/* need if we decide to go with multiple KCQE's per conn */
839 	num_kwqes += 1;
840 
841 	if (hba->cnic && hba->cnic->submit_kwqes)
842 		hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
843 }
844 
845 /**
846  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
847  *
848  * @hba: 		adapter structure pointer
849  * @ep: 		endpoint (transport indentifier) structure
850  *
851  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
852  */
853 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
854 {
855 	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
856 		bnx2i_5771x_send_conn_ofld_req(hba, ep);
857 	else
858 		bnx2i_570x_send_conn_ofld_req(hba, ep);
859 }
860 
861 
862 /**
863  * setup_qp_page_tables - iscsi QP page table setup function
864  * @ep:		endpoint (transport indentifier) structure
865  *
866  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
867  * 	64-bit address in big endian format. Whereas 10G/sec (57710) requires
868  * 	PT in little endian format
869  */
870 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
871 {
872 	int num_pages;
873 	u32 *ptbl;
874 	dma_addr_t page;
875 	int cnic_dev_10g;
876 
877 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
878 		cnic_dev_10g = 1;
879 	else
880 		cnic_dev_10g = 0;
881 
882 	/* SQ page table */
883 	memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
884 	num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
885 	page = ep->qp.sq_phys;
886 
887 	if (cnic_dev_10g)
888 		ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
889 	else
890 		ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
891 	while (num_pages--) {
892 		if (cnic_dev_10g) {
893 			/* PTE is written in little endian format for 57710 */
894 			*ptbl = (u32) page;
895 			ptbl++;
896 			*ptbl = (u32) ((u64) page >> 32);
897 			ptbl++;
898 			page += PAGE_SIZE;
899 		} else {
900 			/* PTE is written in big endian format for
901 			 * 5706/5708/5709 devices */
902 			*ptbl = (u32) ((u64) page >> 32);
903 			ptbl++;
904 			*ptbl = (u32) page;
905 			ptbl++;
906 			page += PAGE_SIZE;
907 		}
908 	}
909 
910 	/* RQ page table */
911 	memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
912 	num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
913 	page = ep->qp.rq_phys;
914 
915 	if (cnic_dev_10g)
916 		ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
917 	else
918 		ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
919 	while (num_pages--) {
920 		if (cnic_dev_10g) {
921 			/* PTE is written in little endian format for 57710 */
922 			*ptbl = (u32) page;
923 			ptbl++;
924 			*ptbl = (u32) ((u64) page >> 32);
925 			ptbl++;
926 			page += PAGE_SIZE;
927 		} else {
928 			/* PTE is written in big endian format for
929 			 * 5706/5708/5709 devices */
930 			*ptbl = (u32) ((u64) page >> 32);
931 			ptbl++;
932 			*ptbl = (u32) page;
933 			ptbl++;
934 			page += PAGE_SIZE;
935 		}
936 	}
937 
938 	/* CQ page table */
939 	memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
940 	num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
941 	page = ep->qp.cq_phys;
942 
943 	if (cnic_dev_10g)
944 		ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
945 	else
946 		ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
947 	while (num_pages--) {
948 		if (cnic_dev_10g) {
949 			/* PTE is written in little endian format for 57710 */
950 			*ptbl = (u32) page;
951 			ptbl++;
952 			*ptbl = (u32) ((u64) page >> 32);
953 			ptbl++;
954 			page += PAGE_SIZE;
955 		} else {
956 			/* PTE is written in big endian format for
957 			 * 5706/5708/5709 devices */
958 			*ptbl = (u32) ((u64) page >> 32);
959 			ptbl++;
960 			*ptbl = (u32) page;
961 			ptbl++;
962 			page += PAGE_SIZE;
963 		}
964 	}
965 }
966 
967 
968 /**
969  * bnx2i_alloc_qp_resc - allocates required resources for QP.
970  * @hba:	adapter structure pointer
971  * @ep:		endpoint (transport indentifier) structure
972  *
973  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
974  *	memory for SQ/RQ/CQ and page tables. EP structure elements such
975  *	as producer/consumer indexes/pointers, queue sizes and page table
976  *	contents are setup
977  */
978 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
979 {
980 	struct bnx2i_5771x_cq_db *cq_db;
981 
982 	ep->hba = hba;
983 	ep->conn = NULL;
984 	ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
985 
986 	/* Allocate page table memory for SQ which is page aligned */
987 	ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
988 	ep->qp.sq_mem_size =
989 		(ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
990 	ep->qp.sq_pgtbl_size =
991 		(ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
992 	ep->qp.sq_pgtbl_size =
993 		(ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
994 
995 	ep->qp.sq_pgtbl_virt =
996 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
997 				   &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
998 	if (!ep->qp.sq_pgtbl_virt) {
999 		printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1000 				  ep->qp.sq_pgtbl_size);
1001 		goto mem_alloc_err;
1002 	}
1003 
1004 	/* Allocate memory area for actual SQ element */
1005 	ep->qp.sq_virt =
1006 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1007 				   &ep->qp.sq_phys, GFP_KERNEL);
1008 	if (!ep->qp.sq_virt) {
1009 		printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1010 				  ep->qp.sq_mem_size);
1011 		goto mem_alloc_err;
1012 	}
1013 
1014 	memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1015 	ep->qp.sq_first_qe = ep->qp.sq_virt;
1016 	ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1017 	ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1018 	ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1019 	ep->qp.sq_prod_idx = 0;
1020 	ep->qp.sq_cons_idx = 0;
1021 	ep->qp.sqe_left = hba->max_sqes;
1022 
1023 	/* Allocate page table memory for CQ which is page aligned */
1024 	ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1025 	ep->qp.cq_mem_size =
1026 		(ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1027 	ep->qp.cq_pgtbl_size =
1028 		(ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1029 	ep->qp.cq_pgtbl_size =
1030 		(ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1031 
1032 	ep->qp.cq_pgtbl_virt =
1033 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1034 				   &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1035 	if (!ep->qp.cq_pgtbl_virt) {
1036 		printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1037 				  ep->qp.cq_pgtbl_size);
1038 		goto mem_alloc_err;
1039 	}
1040 
1041 	/* Allocate memory area for actual CQ element */
1042 	ep->qp.cq_virt =
1043 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1044 				   &ep->qp.cq_phys, GFP_KERNEL);
1045 	if (!ep->qp.cq_virt) {
1046 		printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1047 				  ep->qp.cq_mem_size);
1048 		goto mem_alloc_err;
1049 	}
1050 	memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1051 
1052 	ep->qp.cq_first_qe = ep->qp.cq_virt;
1053 	ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1054 	ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1055 	ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1056 	ep->qp.cq_prod_idx = 0;
1057 	ep->qp.cq_cons_idx = 0;
1058 	ep->qp.cqe_left = hba->max_cqes;
1059 	ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1060 	ep->qp.cqe_size = hba->max_cqes;
1061 
1062 	/* Invalidate all EQ CQE index, req only for 57710 */
1063 	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1064 	memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1065 
1066 	/* Allocate page table memory for RQ which is page aligned */
1067 	ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1068 	ep->qp.rq_mem_size =
1069 		(ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1070 	ep->qp.rq_pgtbl_size =
1071 		(ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1072 	ep->qp.rq_pgtbl_size =
1073 		(ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1074 
1075 	ep->qp.rq_pgtbl_virt =
1076 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1077 				   &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1078 	if (!ep->qp.rq_pgtbl_virt) {
1079 		printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1080 				  ep->qp.rq_pgtbl_size);
1081 		goto mem_alloc_err;
1082 	}
1083 
1084 	/* Allocate memory area for actual RQ element */
1085 	ep->qp.rq_virt =
1086 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1087 				   &ep->qp.rq_phys, GFP_KERNEL);
1088 	if (!ep->qp.rq_virt) {
1089 		printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1090 				  ep->qp.rq_mem_size);
1091 		goto mem_alloc_err;
1092 	}
1093 
1094 	ep->qp.rq_first_qe = ep->qp.rq_virt;
1095 	ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1096 	ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1097 	ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1098 	ep->qp.rq_prod_idx = 0x8000;
1099 	ep->qp.rq_cons_idx = 0;
1100 	ep->qp.rqe_left = hba->max_rqes;
1101 
1102 	setup_qp_page_tables(ep);
1103 
1104 	return 0;
1105 
1106 mem_alloc_err:
1107 	bnx2i_free_qp_resc(hba, ep);
1108 	return -ENOMEM;
1109 }
1110 
1111 
1112 
1113 /**
1114  * bnx2i_free_qp_resc - free memory resources held by QP
1115  * @hba:	adapter structure pointer
1116  * @ep:	endpoint (transport indentifier) structure
1117  *
1118  * Free QP resources - SQ/RQ/CQ memory and page tables.
1119  */
1120 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1121 {
1122 	if (ep->qp.ctx_base) {
1123 		iounmap(ep->qp.ctx_base);
1124 		ep->qp.ctx_base = NULL;
1125 	}
1126 	/* Free SQ mem */
1127 	if (ep->qp.sq_pgtbl_virt) {
1128 		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1129 				  ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1130 		ep->qp.sq_pgtbl_virt = NULL;
1131 		ep->qp.sq_pgtbl_phys = 0;
1132 	}
1133 	if (ep->qp.sq_virt) {
1134 		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1135 				  ep->qp.sq_virt, ep->qp.sq_phys);
1136 		ep->qp.sq_virt = NULL;
1137 		ep->qp.sq_phys = 0;
1138 	}
1139 
1140 	/* Free RQ mem */
1141 	if (ep->qp.rq_pgtbl_virt) {
1142 		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1143 				  ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1144 		ep->qp.rq_pgtbl_virt = NULL;
1145 		ep->qp.rq_pgtbl_phys = 0;
1146 	}
1147 	if (ep->qp.rq_virt) {
1148 		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1149 				  ep->qp.rq_virt, ep->qp.rq_phys);
1150 		ep->qp.rq_virt = NULL;
1151 		ep->qp.rq_phys = 0;
1152 	}
1153 
1154 	/* Free CQ mem */
1155 	if (ep->qp.cq_pgtbl_virt) {
1156 		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1157 				  ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1158 		ep->qp.cq_pgtbl_virt = NULL;
1159 		ep->qp.cq_pgtbl_phys = 0;
1160 	}
1161 	if (ep->qp.cq_virt) {
1162 		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1163 				  ep->qp.cq_virt, ep->qp.cq_phys);
1164 		ep->qp.cq_virt = NULL;
1165 		ep->qp.cq_phys = 0;
1166 	}
1167 }
1168 
1169 
1170 /**
1171  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1172  * @hba:	adapter structure pointer
1173  *
1174  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1175  * 	This results in iSCSi support validation and on-chip context manager
1176  * 	initialization.  Firmware completes this handshake with a CQE carrying
1177  * 	the result of iscsi support validation. Parameter carried by
1178  * 	iscsi init request determines the number of offloaded connection and
1179  * 	tolerance level for iscsi protocol violation this hba/chip can support
1180  */
1181 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1182 {
1183 	struct kwqe *kwqe_arr[3];
1184 	struct iscsi_kwqe_init1 iscsi_init;
1185 	struct iscsi_kwqe_init2 iscsi_init2;
1186 	int rc = 0;
1187 	u64 mask64;
1188 
1189 	bnx2i_adjust_qp_size(hba);
1190 
1191 	iscsi_init.flags =
1192 		ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1193 	if (en_tcp_dack)
1194 		iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1195 	iscsi_init.reserved0 = 0;
1196 	iscsi_init.num_cqs = 1;
1197 	iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1198 	iscsi_init.hdr.flags =
1199 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1200 
1201 	iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1202 	iscsi_init.dummy_buffer_addr_hi =
1203 		(u32) ((u64) hba->dummy_buf_dma >> 32);
1204 
1205 	hba->ctx_ccell_tasks =
1206 			((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1207 	iscsi_init.num_ccells_per_conn = hba->num_ccell;
1208 	iscsi_init.num_tasks_per_conn = hba->max_sqes;
1209 	iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1210 	iscsi_init.sq_num_wqes = hba->max_sqes;
1211 	iscsi_init.cq_log_wqes_per_page =
1212 		(u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1213 	iscsi_init.cq_num_wqes = hba->max_cqes;
1214 	iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1215 				   (PAGE_SIZE - 1)) / PAGE_SIZE;
1216 	iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1217 				   (PAGE_SIZE - 1)) / PAGE_SIZE;
1218 	iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1219 	iscsi_init.rq_num_wqes = hba->max_rqes;
1220 
1221 
1222 	iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1223 	iscsi_init2.hdr.flags =
1224 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1225 	iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1226 	mask64 = 0x0ULL;
1227 	mask64 |= (
1228 		/* CISCO MDS */
1229 		(1UL <<
1230 		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1231 		/* HP MSA1510i */
1232 		(1UL <<
1233 		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1234 		/* EMC */
1235 		(1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1236 	if (error_mask1)
1237 		iscsi_init2.error_bit_map[0] = error_mask1;
1238 	else
1239 		iscsi_init2.error_bit_map[0] = (u32) mask64;
1240 
1241 	if (error_mask2)
1242 		iscsi_init2.error_bit_map[1] = error_mask2;
1243 	else
1244 		iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1245 
1246 	iscsi_error_mask = mask64;
1247 
1248 	kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1249 	kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1250 
1251 	if (hba->cnic && hba->cnic->submit_kwqes)
1252 		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1253 	return rc;
1254 }
1255 
1256 
1257 /**
1258  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1259  * @conn:	iscsi connection
1260  * @cqe:	pointer to newly DMA'ed CQE entry for processing
1261  *
1262  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1263  */
1264 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1265 				       struct bnx2i_conn *bnx2i_conn,
1266 				       struct cqe *cqe)
1267 {
1268 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1269 	struct bnx2i_cmd_response *resp_cqe;
1270 	struct bnx2i_cmd *bnx2i_cmd;
1271 	struct iscsi_task *task;
1272 	struct iscsi_cmd_rsp *hdr;
1273 	u32 datalen = 0;
1274 
1275 	resp_cqe = (struct bnx2i_cmd_response *)cqe;
1276 	spin_lock(&session->lock);
1277 	task = iscsi_itt_to_task(conn,
1278 				 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1279 	if (!task)
1280 		goto fail;
1281 
1282 	bnx2i_cmd = task->dd_data;
1283 
1284 	if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1285 		conn->datain_pdus_cnt +=
1286 			resp_cqe->task_stat.read_stat.num_data_outs;
1287 		conn->rxdata_octets +=
1288 			bnx2i_cmd->req.total_data_transfer_length;
1289 	} else {
1290 		conn->dataout_pdus_cnt +=
1291 			resp_cqe->task_stat.read_stat.num_data_outs;
1292 		conn->r2t_pdus_cnt +=
1293 			resp_cqe->task_stat.read_stat.num_r2ts;
1294 		conn->txdata_octets +=
1295 			bnx2i_cmd->req.total_data_transfer_length;
1296 	}
1297 	bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1298 
1299 	hdr = (struct iscsi_cmd_rsp *)task->hdr;
1300 	resp_cqe = (struct bnx2i_cmd_response *)cqe;
1301 	hdr->opcode = resp_cqe->op_code;
1302 	hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1303 	hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1304 	hdr->response = resp_cqe->response;
1305 	hdr->cmd_status = resp_cqe->status;
1306 	hdr->flags = resp_cqe->response_flags;
1307 	hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1308 
1309 	if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1310 		goto done;
1311 
1312 	if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1313 		datalen = resp_cqe->data_length;
1314 		if (datalen < 2)
1315 			goto done;
1316 
1317 		if (datalen > BNX2I_RQ_WQE_SIZE) {
1318 			iscsi_conn_printk(KERN_ERR, conn,
1319 					  "sense data len %d > RQ sz\n",
1320 					  datalen);
1321 			datalen = BNX2I_RQ_WQE_SIZE;
1322 		} else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1323 			iscsi_conn_printk(KERN_ERR, conn,
1324 					  "sense data len %d > conn data\n",
1325 					  datalen);
1326 			datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1327 		}
1328 
1329 		bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1330 		bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1331 	}
1332 
1333 done:
1334 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1335 			     conn->data, datalen);
1336 fail:
1337 	spin_unlock(&session->lock);
1338 	return 0;
1339 }
1340 
1341 
1342 /**
1343  * bnx2i_process_login_resp - this function handles iscsi login response
1344  * @session:		iscsi session pointer
1345  * @bnx2i_conn:		iscsi connection pointer
1346  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1347  *
1348  * process Login Response CQE & complete it to open-iscsi user daemon
1349  */
1350 static int bnx2i_process_login_resp(struct iscsi_session *session,
1351 				    struct bnx2i_conn *bnx2i_conn,
1352 				    struct cqe *cqe)
1353 {
1354 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1355 	struct iscsi_task *task;
1356 	struct bnx2i_login_response *login;
1357 	struct iscsi_login_rsp *resp_hdr;
1358 	int pld_len;
1359 	int pad_len;
1360 
1361 	login = (struct bnx2i_login_response *) cqe;
1362 	spin_lock(&session->lock);
1363 	task = iscsi_itt_to_task(conn,
1364 				 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1365 	if (!task)
1366 		goto done;
1367 
1368 	resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1369 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1370 	resp_hdr->opcode = login->op_code;
1371 	resp_hdr->flags = login->response_flags;
1372 	resp_hdr->max_version = login->version_max;
1373 	resp_hdr->active_version = login->version_active;
1374 	resp_hdr->hlength = 0;
1375 
1376 	hton24(resp_hdr->dlength, login->data_length);
1377 	memcpy(resp_hdr->isid, &login->isid_lo, 6);
1378 	resp_hdr->tsih = cpu_to_be16(login->tsih);
1379 	resp_hdr->itt = task->hdr->itt;
1380 	resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1381 	resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1382 	resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1383 	resp_hdr->status_class = login->status_class;
1384 	resp_hdr->status_detail = login->status_detail;
1385 	pld_len = login->data_length;
1386 	bnx2i_conn->gen_pdu.resp_wr_ptr =
1387 					bnx2i_conn->gen_pdu.resp_buf + pld_len;
1388 
1389 	pad_len = 0;
1390 	if (pld_len & 0x3)
1391 		pad_len = 4 - (pld_len % 4);
1392 
1393 	if (pad_len) {
1394 		int i = 0;
1395 		for (i = 0; i < pad_len; i++) {
1396 			bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1397 			bnx2i_conn->gen_pdu.resp_wr_ptr++;
1398 		}
1399 	}
1400 
1401 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1402 		bnx2i_conn->gen_pdu.resp_buf,
1403 		bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1404 done:
1405 	spin_unlock(&session->lock);
1406 	return 0;
1407 }
1408 
1409 /**
1410  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1411  * @session:		iscsi session pointer
1412  * @bnx2i_conn:		iscsi connection pointer
1413  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1414  *
1415  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1416  */
1417 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1418 				  struct bnx2i_conn *bnx2i_conn,
1419 				  struct cqe *cqe)
1420 {
1421 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1422 	struct iscsi_task *task;
1423 	struct bnx2i_tmf_response *tmf_cqe;
1424 	struct iscsi_tm_rsp *resp_hdr;
1425 
1426 	tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1427 	spin_lock(&session->lock);
1428 	task = iscsi_itt_to_task(conn,
1429 				 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1430 	if (!task)
1431 		goto done;
1432 
1433 	resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1434 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1435 	resp_hdr->opcode = tmf_cqe->op_code;
1436 	resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1437 	resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1438 	resp_hdr->itt = task->hdr->itt;
1439 	resp_hdr->response = tmf_cqe->response;
1440 
1441 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1442 done:
1443 	spin_unlock(&session->lock);
1444 	return 0;
1445 }
1446 
1447 /**
1448  * bnx2i_process_logout_resp - this function handles iscsi logout response
1449  * @session:		iscsi session pointer
1450  * @bnx2i_conn:		iscsi connection pointer
1451  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1452  *
1453  * process iSCSI Logout Response CQE & make function call to
1454  * notify the user daemon.
1455  */
1456 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1457 				     struct bnx2i_conn *bnx2i_conn,
1458 				     struct cqe *cqe)
1459 {
1460 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1461 	struct iscsi_task *task;
1462 	struct bnx2i_logout_response *logout;
1463 	struct iscsi_logout_rsp *resp_hdr;
1464 
1465 	logout = (struct bnx2i_logout_response *) cqe;
1466 	spin_lock(&session->lock);
1467 	task = iscsi_itt_to_task(conn,
1468 				 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1469 	if (!task)
1470 		goto done;
1471 
1472 	resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1473 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1474 	resp_hdr->opcode = logout->op_code;
1475 	resp_hdr->flags = logout->response;
1476 	resp_hdr->hlength = 0;
1477 
1478 	resp_hdr->itt = task->hdr->itt;
1479 	resp_hdr->statsn = task->hdr->exp_statsn;
1480 	resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1481 	resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1482 
1483 	resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1484 	resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1485 
1486 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1487 
1488 	bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1489 done:
1490 	spin_unlock(&session->lock);
1491 	return 0;
1492 }
1493 
1494 /**
1495  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1496  * @session:		iscsi session pointer
1497  * @bnx2i_conn:		iscsi connection pointer
1498  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1499  *
1500  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1501  */
1502 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1503 					   struct bnx2i_conn *bnx2i_conn,
1504 					   struct cqe *cqe)
1505 {
1506 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1507 	struct bnx2i_nop_in_msg *nop_in;
1508 	struct iscsi_task *task;
1509 
1510 	nop_in = (struct bnx2i_nop_in_msg *)cqe;
1511 	spin_lock(&session->lock);
1512 	task = iscsi_itt_to_task(conn,
1513 				 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1514 	if (task)
1515 		iscsi_put_task(task);
1516 	spin_unlock(&session->lock);
1517 }
1518 
1519 /**
1520  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1521  * @conn:	iscsi connection
1522  *
1523  * Firmware advances RQ producer index for every unsolicited PDU even if
1524  *	payload data length is '0'. This function makes corresponding
1525  *	adjustments on the driver side to match this f/w behavior
1526  */
1527 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1528 {
1529 	char dummy_rq_data[2];
1530 	bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1531 	bnx2i_put_rq_buf(bnx2i_conn, 1);
1532 }
1533 
1534 
1535 /**
1536  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1537  * @session:		iscsi session pointer
1538  * @bnx2i_conn:		iscsi connection pointer
1539  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1540  *
1541  * process iSCSI target's proactive iSCSI NOPIN request
1542  */
1543 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1544 				     struct bnx2i_conn *bnx2i_conn,
1545 				     struct cqe *cqe)
1546 {
1547 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1548 	struct iscsi_task *task;
1549 	struct bnx2i_nop_in_msg *nop_in;
1550 	struct iscsi_nopin *hdr;
1551 	u32 itt;
1552 	int tgt_async_nop = 0;
1553 
1554 	nop_in = (struct bnx2i_nop_in_msg *)cqe;
1555 	itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1556 
1557 	spin_lock(&session->lock);
1558 	hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1559 	memset(hdr, 0, sizeof(struct iscsi_hdr));
1560 	hdr->opcode = nop_in->op_code;
1561 	hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1562 	hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1563 	hdr->ttt = cpu_to_be32(nop_in->ttt);
1564 
1565 	if (itt == (u16) RESERVED_ITT) {
1566 		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1567 		hdr->itt = RESERVED_ITT;
1568 		tgt_async_nop = 1;
1569 		goto done;
1570 	}
1571 
1572 	/* this is a response to one of our nop-outs */
1573 	task = iscsi_itt_to_task(conn, itt);
1574 	if (task) {
1575 		hdr->flags = ISCSI_FLAG_CMD_FINAL;
1576 		hdr->itt = task->hdr->itt;
1577 		hdr->ttt = cpu_to_be32(nop_in->ttt);
1578 		memcpy(hdr->lun, nop_in->lun, 8);
1579 	}
1580 done:
1581 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1582 	spin_unlock(&session->lock);
1583 
1584 	return tgt_async_nop;
1585 }
1586 
1587 
1588 /**
1589  * bnx2i_process_async_mesg - this function handles iscsi async message
1590  * @session:		iscsi session pointer
1591  * @bnx2i_conn:		iscsi connection pointer
1592  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1593  *
1594  * process iSCSI ASYNC Message
1595  */
1596 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1597 				     struct bnx2i_conn *bnx2i_conn,
1598 				     struct cqe *cqe)
1599 {
1600 	struct bnx2i_async_msg *async_cqe;
1601 	struct iscsi_async *resp_hdr;
1602 	u8 async_event;
1603 
1604 	bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1605 
1606 	async_cqe = (struct bnx2i_async_msg *)cqe;
1607 	async_event = async_cqe->async_event;
1608 
1609 	if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1610 		iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1611 				  "async: scsi events not supported\n");
1612 		return;
1613 	}
1614 
1615 	spin_lock(&session->lock);
1616 	resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1617 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1618 	resp_hdr->opcode = async_cqe->op_code;
1619 	resp_hdr->flags = 0x80;
1620 
1621 	memcpy(resp_hdr->lun, async_cqe->lun, 8);
1622 	resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1623 	resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1624 
1625 	resp_hdr->async_event = async_cqe->async_event;
1626 	resp_hdr->async_vcode = async_cqe->async_vcode;
1627 
1628 	resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1629 	resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1630 	resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1631 
1632 	__iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1633 			     (struct iscsi_hdr *)resp_hdr, NULL, 0);
1634 	spin_unlock(&session->lock);
1635 }
1636 
1637 
1638 /**
1639  * bnx2i_process_reject_mesg - process iscsi reject pdu
1640  * @session:		iscsi session pointer
1641  * @bnx2i_conn:		iscsi connection pointer
1642  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1643  *
1644  * process iSCSI REJECT message
1645  */
1646 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1647 				      struct bnx2i_conn *bnx2i_conn,
1648 				      struct cqe *cqe)
1649 {
1650 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1651 	struct bnx2i_reject_msg *reject;
1652 	struct iscsi_reject *hdr;
1653 
1654 	reject = (struct bnx2i_reject_msg *) cqe;
1655 	if (reject->data_length) {
1656 		bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1657 		bnx2i_put_rq_buf(bnx2i_conn, 1);
1658 	} else
1659 		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1660 
1661 	spin_lock(&session->lock);
1662 	hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1663 	memset(hdr, 0, sizeof(struct iscsi_hdr));
1664 	hdr->opcode = reject->op_code;
1665 	hdr->reason = reject->reason;
1666 	hton24(hdr->dlength, reject->data_length);
1667 	hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1668 	hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1669 	hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1670 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1671 			     reject->data_length);
1672 	spin_unlock(&session->lock);
1673 }
1674 
1675 /**
1676  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1677  * @session:		iscsi session pointer
1678  * @bnx2i_conn:		iscsi connection pointer
1679  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1680  *
1681  * process command cleanup response CQE during conn shutdown or error recovery
1682  */
1683 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1684 					   struct bnx2i_conn *bnx2i_conn,
1685 					   struct cqe *cqe)
1686 {
1687 	struct bnx2i_cleanup_response *cmd_clean_rsp;
1688 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1689 	struct iscsi_task *task;
1690 
1691 	cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1692 	spin_lock(&session->lock);
1693 	task = iscsi_itt_to_task(conn,
1694 			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1695 	if (!task)
1696 		printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1697 			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1698 	spin_unlock(&session->lock);
1699 	complete(&bnx2i_conn->cmd_cleanup_cmpl);
1700 }
1701 
1702 
1703 
1704 /**
1705  * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1706  * @bnx2i_conn:		iscsi connection
1707  *
1708  * this function is called by generic KCQ handler to process all pending CQE's
1709  */
1710 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1711 {
1712 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1713 	struct iscsi_session *session = conn->session;
1714 	struct qp_info *qp = &bnx2i_conn->ep->qp;
1715 	struct bnx2i_nop_in_msg *nopin;
1716 	int tgt_async_msg;
1717 
1718 	while (1) {
1719 		nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1720 		if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1721 			break;
1722 
1723 		if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1724 			break;
1725 
1726 		tgt_async_msg = 0;
1727 
1728 		switch (nopin->op_code) {
1729 		case ISCSI_OP_SCSI_CMD_RSP:
1730 		case ISCSI_OP_SCSI_DATA_IN:
1731 			bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1732 						    qp->cq_cons_qe);
1733 			break;
1734 		case ISCSI_OP_LOGIN_RSP:
1735 			bnx2i_process_login_resp(session, bnx2i_conn,
1736 						 qp->cq_cons_qe);
1737 			break;
1738 		case ISCSI_OP_SCSI_TMFUNC_RSP:
1739 			bnx2i_process_tmf_resp(session, bnx2i_conn,
1740 					       qp->cq_cons_qe);
1741 			break;
1742 		case ISCSI_OP_LOGOUT_RSP:
1743 			bnx2i_process_logout_resp(session, bnx2i_conn,
1744 						  qp->cq_cons_qe);
1745 			break;
1746 		case ISCSI_OP_NOOP_IN:
1747 			if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1748 						     qp->cq_cons_qe))
1749 				tgt_async_msg = 1;
1750 			break;
1751 		case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1752 			bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1753 						       qp->cq_cons_qe);
1754 			break;
1755 		case ISCSI_OP_ASYNC_EVENT:
1756 			bnx2i_process_async_mesg(session, bnx2i_conn,
1757 						 qp->cq_cons_qe);
1758 			tgt_async_msg = 1;
1759 			break;
1760 		case ISCSI_OP_REJECT:
1761 			bnx2i_process_reject_mesg(session, bnx2i_conn,
1762 						  qp->cq_cons_qe);
1763 			break;
1764 		case ISCSI_OPCODE_CLEANUP_RESPONSE:
1765 			bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1766 						       qp->cq_cons_qe);
1767 			break;
1768 		default:
1769 			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1770 					  nopin->op_code);
1771 		}
1772 
1773 		if (!tgt_async_msg)
1774 			bnx2i_conn->ep->num_active_cmds--;
1775 
1776 		/* clear out in production version only, till beta keep opcode
1777 		 * field intact, will be helpful in debugging (context dump)
1778 		 * nopin->op_code = 0;
1779 		 */
1780 		qp->cqe_exp_seq_sn++;
1781 		if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1782 			qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1783 
1784 		if (qp->cq_cons_qe == qp->cq_last_qe) {
1785 			qp->cq_cons_qe = qp->cq_first_qe;
1786 			qp->cq_cons_idx = 0;
1787 		} else {
1788 			qp->cq_cons_qe++;
1789 			qp->cq_cons_idx++;
1790 		}
1791 	}
1792 	bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1793 }
1794 
1795 /**
1796  * bnx2i_fastpath_notification - process global event queue (KCQ)
1797  * @hba:		adapter structure pointer
1798  * @new_cqe_kcqe:	pointer to newly DMA'ed KCQE entry
1799  *
1800  * Fast path event notification handler, KCQ entry carries context id
1801  *	of the connection that has 1 or more pending CQ entries
1802  */
1803 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1804 					struct iscsi_kcqe *new_cqe_kcqe)
1805 {
1806 	struct bnx2i_conn *conn;
1807 	u32 iscsi_cid;
1808 
1809 	iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1810 	conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1811 
1812 	if (!conn) {
1813 		printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1814 		return;
1815 	}
1816 	if (!conn->ep) {
1817 		printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1818 		return;
1819 	}
1820 
1821 	bnx2i_process_new_cqes(conn);
1822 }
1823 
1824 
1825 /**
1826  * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1827  * @hba:		adapter structure pointer
1828  * @update_kcqe:	kcqe pointer
1829  *
1830  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1831  */
1832 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1833 					   struct iscsi_kcqe *update_kcqe)
1834 {
1835 	struct bnx2i_conn *conn;
1836 	u32 iscsi_cid;
1837 
1838 	iscsi_cid = update_kcqe->iscsi_conn_id;
1839 	conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1840 
1841 	if (!conn) {
1842 		printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1843 		return;
1844 	}
1845 	if (!conn->ep) {
1846 		printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1847 		return;
1848 	}
1849 
1850 	if (update_kcqe->completion_status) {
1851 		printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1852 		conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1853 	} else
1854 		conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1855 
1856 	wake_up_interruptible(&conn->ep->ofld_wait);
1857 }
1858 
1859 
1860 /**
1861  * bnx2i_recovery_que_add_conn - add connection to recovery queue
1862  * @hba:		adapter structure pointer
1863  * @bnx2i_conn:		iscsi connection
1864  *
1865  * Add connection to recovery queue and schedule adapter eh worker
1866  */
1867 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1868 					struct bnx2i_conn *bnx2i_conn)
1869 {
1870 	iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1871 			   ISCSI_ERR_CONN_FAILED);
1872 }
1873 
1874 
1875 /**
1876  * bnx2i_process_tcp_error - process error notification on a given connection
1877  *
1878  * @hba: 		adapter structure pointer
1879  * @tcp_err: 		tcp error kcqe pointer
1880  *
1881  * handles tcp level error notifications from FW.
1882  */
1883 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1884 				    struct iscsi_kcqe *tcp_err)
1885 {
1886 	struct bnx2i_conn *bnx2i_conn;
1887 	u32 iscsi_cid;
1888 
1889 	iscsi_cid = tcp_err->iscsi_conn_id;
1890 	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1891 
1892 	if (!bnx2i_conn) {
1893 		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1894 		return;
1895 	}
1896 
1897 	printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1898 			  iscsi_cid, tcp_err->completion_status);
1899 	bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1900 }
1901 
1902 
1903 /**
1904  * bnx2i_process_iscsi_error - process error notification on a given connection
1905  * @hba:		adapter structure pointer
1906  * @iscsi_err:		iscsi error kcqe pointer
1907  *
1908  * handles iscsi error notifications from the FW. Firmware based in initial
1909  *	handshake classifies iscsi protocol / TCP rfc violation into either
1910  *	warning or error indications. If indication is of "Error" type, driver
1911  *	will initiate session recovery for that connection/session. For
1912  *	"Warning" type indication, driver will put out a system log message
1913  *	(there will be only one message for each type for the life of the
1914  *	session, this is to avoid un-necessarily overloading the system)
1915  */
1916 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1917 				      struct iscsi_kcqe *iscsi_err)
1918 {
1919 	struct bnx2i_conn *bnx2i_conn;
1920 	u32 iscsi_cid;
1921 	char warn_notice[] = "iscsi_warning";
1922 	char error_notice[] = "iscsi_error";
1923 	char additional_notice[64];
1924 	char *message;
1925 	int need_recovery;
1926 	u64 err_mask64;
1927 
1928 	iscsi_cid = iscsi_err->iscsi_conn_id;
1929 	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1930 	if (!bnx2i_conn) {
1931 		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1932 		return;
1933 	}
1934 
1935 	err_mask64 = (0x1ULL << iscsi_err->completion_status);
1936 
1937 	if (err_mask64 & iscsi_error_mask) {
1938 		need_recovery = 0;
1939 		message = warn_notice;
1940 	} else {
1941 		need_recovery = 1;
1942 		message = error_notice;
1943 	}
1944 
1945 	switch (iscsi_err->completion_status) {
1946 	case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1947 		strcpy(additional_notice, "hdr digest err");
1948 		break;
1949 	case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1950 		strcpy(additional_notice, "data digest err");
1951 		break;
1952 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1953 		strcpy(additional_notice, "wrong opcode rcvd");
1954 		break;
1955 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1956 		strcpy(additional_notice, "AHS len > 0 rcvd");
1957 		break;
1958 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1959 		strcpy(additional_notice, "invalid ITT rcvd");
1960 		break;
1961 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1962 		strcpy(additional_notice, "wrong StatSN rcvd");
1963 		break;
1964 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1965 		strcpy(additional_notice, "wrong DataSN rcvd");
1966 		break;
1967 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1968 		strcpy(additional_notice, "pend R2T violation");
1969 		break;
1970 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1971 		strcpy(additional_notice, "ERL0, UO");
1972 		break;
1973 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1974 		strcpy(additional_notice, "ERL0, U1");
1975 		break;
1976 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1977 		strcpy(additional_notice, "ERL0, U2");
1978 		break;
1979 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1980 		strcpy(additional_notice, "ERL0, U3");
1981 		break;
1982 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1983 		strcpy(additional_notice, "ERL0, U4");
1984 		break;
1985 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1986 		strcpy(additional_notice, "ERL0, U5");
1987 		break;
1988 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1989 		strcpy(additional_notice, "ERL0, U6");
1990 		break;
1991 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1992 		strcpy(additional_notice, "invalid resi len");
1993 		break;
1994 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1995 		strcpy(additional_notice, "MRDSL violation");
1996 		break;
1997 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1998 		strcpy(additional_notice, "F-bit not set");
1999 		break;
2000 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2001 		strcpy(additional_notice, "invalid TTT");
2002 		break;
2003 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2004 		strcpy(additional_notice, "invalid DataSN");
2005 		break;
2006 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2007 		strcpy(additional_notice, "burst len violation");
2008 		break;
2009 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2010 		strcpy(additional_notice, "buf offset violation");
2011 		break;
2012 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2013 		strcpy(additional_notice, "invalid LUN field");
2014 		break;
2015 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2016 		strcpy(additional_notice, "invalid R2TSN field");
2017 		break;
2018 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 	\
2019 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2020 	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2021 		strcpy(additional_notice, "invalid cmd len1");
2022 		break;
2023 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 	\
2024 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2025 	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2026 		strcpy(additional_notice, "invalid cmd len2");
2027 		break;
2028 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2029 		strcpy(additional_notice,
2030 		       "pend r2t exceeds MaxOutstandingR2T value");
2031 		break;
2032 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2033 		strcpy(additional_notice, "TTT is rsvd");
2034 		break;
2035 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2036 		strcpy(additional_notice, "MBL violation");
2037 		break;
2038 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO 	\
2039 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2040 	case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2041 		strcpy(additional_notice, "data seg len != 0");
2042 		break;
2043 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2044 		strcpy(additional_notice, "reject pdu len error");
2045 		break;
2046 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2047 		strcpy(additional_notice, "async pdu len error");
2048 		break;
2049 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2050 		strcpy(additional_notice, "nopin pdu len error");
2051 		break;
2052 #define BNX2_ERR_PEND_R2T_IN_CLEANUP			\
2053 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2054 	case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2055 		strcpy(additional_notice, "pend r2t in cleanup");
2056 		break;
2057 
2058 	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2059 		strcpy(additional_notice, "IP fragments rcvd");
2060 		break;
2061 	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2062 		strcpy(additional_notice, "IP options error");
2063 		break;
2064 	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2065 		strcpy(additional_notice, "urgent flag error");
2066 		break;
2067 	default:
2068 		printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2069 				  iscsi_err->completion_status);
2070 	}
2071 
2072 	if (need_recovery) {
2073 		iscsi_conn_printk(KERN_ALERT,
2074 				  bnx2i_conn->cls_conn->dd_data,
2075 				  "bnx2i: %s - %s\n",
2076 				  message, additional_notice);
2077 
2078 		iscsi_conn_printk(KERN_ALERT,
2079 				  bnx2i_conn->cls_conn->dd_data,
2080 				  "conn_err - hostno %d conn %p, "
2081 				  "iscsi_cid %x cid %x\n",
2082 				  bnx2i_conn->hba->shost->host_no,
2083 				  bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2084 				  bnx2i_conn->ep->ep_cid);
2085 		bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2086 	} else
2087 		if (!test_and_set_bit(iscsi_err->completion_status,
2088 				      (void *) &bnx2i_conn->violation_notified))
2089 			iscsi_conn_printk(KERN_ALERT,
2090 					  bnx2i_conn->cls_conn->dd_data,
2091 					  "bnx2i: %s - %s\n",
2092 					  message, additional_notice);
2093 }
2094 
2095 
2096 /**
2097  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2098  * @hba:		adapter structure pointer
2099  * @conn_destroy:	conn destroy kcqe pointer
2100  *
2101  * handles connection destroy completion request.
2102  */
2103 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2104 					    struct iscsi_kcqe *conn_destroy)
2105 {
2106 	struct bnx2i_endpoint *ep;
2107 
2108 	ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2109 	if (!ep) {
2110 		printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2111 				  "offload request, unexpected complection\n");
2112 		return;
2113 	}
2114 
2115 	if (hba != ep->hba) {
2116 		printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2117 		return;
2118 	}
2119 
2120 	if (conn_destroy->completion_status) {
2121 		printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2122 		ep->state = EP_STATE_CLEANUP_FAILED;
2123 	} else
2124 		ep->state = EP_STATE_CLEANUP_CMPL;
2125 	wake_up_interruptible(&ep->ofld_wait);
2126 }
2127 
2128 
2129 /**
2130  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2131  * @hba:		adapter structure pointer
2132  * @ofld_kcqe:		conn offload kcqe pointer
2133  *
2134  * handles initial connection offload completion, ep_connect() thread is
2135  *	woken-up to continue with LLP connect process
2136  */
2137 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2138 				    struct iscsi_kcqe *ofld_kcqe)
2139 {
2140 	u32 cid_addr;
2141 	struct bnx2i_endpoint *ep;
2142 	u32 cid_num;
2143 
2144 	ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2145 	if (!ep) {
2146 		printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2147 		return;
2148 	}
2149 
2150 	if (hba != ep->hba) {
2151 		printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2152 		return;
2153 	}
2154 
2155 	if (ofld_kcqe->completion_status) {
2156 		if (ofld_kcqe->completion_status ==
2157 		    ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2158 			printk(KERN_ALERT "bnx2i: unable to allocate"
2159 					  " iSCSI context resources\n");
2160 		ep->state = EP_STATE_OFLD_FAILED;
2161 	} else {
2162 		ep->state = EP_STATE_OFLD_COMPL;
2163 		cid_addr = ofld_kcqe->iscsi_conn_context_id;
2164 		cid_num = bnx2i_get_cid_num(ep);
2165 		ep->ep_cid = cid_addr;
2166 		ep->qp.ctx_base = NULL;
2167 	}
2168 	wake_up_interruptible(&ep->ofld_wait);
2169 }
2170 
2171 /**
2172  * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2173  * @hba:		adapter structure pointer
2174  * @update_kcqe:	kcqe pointer
2175  *
2176  * Generic KCQ event handler/dispatcher
2177  */
2178 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2179 				u32 num_cqe)
2180 {
2181 	struct bnx2i_hba *hba = context;
2182 	int i = 0;
2183 	struct iscsi_kcqe *ikcqe = NULL;
2184 
2185 	while (i < num_cqe) {
2186 		ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2187 
2188 		if (ikcqe->op_code ==
2189 		    ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2190 			bnx2i_fastpath_notification(hba, ikcqe);
2191 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2192 			bnx2i_process_ofld_cmpl(hba, ikcqe);
2193 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2194 			bnx2i_process_update_conn_cmpl(hba, ikcqe);
2195 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2196 			if (ikcqe->completion_status !=
2197 			    ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2198 				bnx2i_iscsi_license_error(hba, ikcqe->\
2199 							  completion_status);
2200 			else {
2201 				set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2202 				bnx2i_get_link_state(hba);
2203 				printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2204 						 "ISCSI_INIT passed\n",
2205 						 (u8)hba->pcidev->bus->number,
2206 						 hba->pci_devno,
2207 						 (u8)hba->pci_func);
2208 
2209 
2210 			}
2211 		} else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2212 			bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2213 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2214 			bnx2i_process_iscsi_error(hba, ikcqe);
2215 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2216 			bnx2i_process_tcp_error(hba, ikcqe);
2217 		else
2218 			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2219 					  ikcqe->op_code);
2220 	}
2221 }
2222 
2223 
2224 /**
2225  * bnx2i_indicate_netevent - Generic netdev event handler
2226  * @context:	adapter structure pointer
2227  * @event:	event type
2228  *
2229  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2230  *	NETDEV_GOING_DOWN and NETDEV_CHANGE
2231  */
2232 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2233 {
2234 	struct bnx2i_hba *hba = context;
2235 
2236 	switch (event) {
2237 	case NETDEV_UP:
2238 		if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2239 			bnx2i_send_fw_iscsi_init_msg(hba);
2240 		break;
2241 	case NETDEV_DOWN:
2242 		clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2243 		clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2244 		break;
2245 	case NETDEV_GOING_DOWN:
2246 		set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2247 		iscsi_host_for_each_session(hba->shost,
2248 					    bnx2i_drop_session);
2249 		break;
2250 	case NETDEV_CHANGE:
2251 		bnx2i_get_link_state(hba);
2252 		break;
2253 	default:
2254 		;
2255 	}
2256 }
2257 
2258 
2259 /**
2260  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2261  * @cm_sk: 		cnic sock structure pointer
2262  *
2263  * function callback exported via bnx2i - cnic driver interface to
2264  *	indicate completion of option-2 TCP connect request.
2265  */
2266 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2267 {
2268 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2269 
2270 	if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2271 		ep->state = EP_STATE_CONNECT_FAILED;
2272 	else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2273 		ep->state = EP_STATE_CONNECT_COMPL;
2274 	else
2275 		ep->state = EP_STATE_CONNECT_FAILED;
2276 
2277 	wake_up_interruptible(&ep->ofld_wait);
2278 }
2279 
2280 
2281 /**
2282  * bnx2i_cm_close_cmpl - process tcp conn close completion
2283  * @cm_sk:	cnic sock structure pointer
2284  *
2285  * function callback exported via bnx2i - cnic driver interface to
2286  *	indicate completion of option-2 graceful TCP connect shutdown
2287  */
2288 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2289 {
2290 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2291 
2292 	ep->state = EP_STATE_DISCONN_COMPL;
2293 	wake_up_interruptible(&ep->ofld_wait);
2294 }
2295 
2296 
2297 /**
2298  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2299  * @cm_sk:	cnic sock structure pointer
2300  *
2301  * function callback exported via bnx2i - cnic driver interface to
2302  *	indicate completion of option-2 abortive TCP connect termination
2303  */
2304 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2305 {
2306 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2307 
2308 	ep->state = EP_STATE_DISCONN_COMPL;
2309 	wake_up_interruptible(&ep->ofld_wait);
2310 }
2311 
2312 
2313 /**
2314  * bnx2i_cm_remote_close - process received TCP FIN
2315  * @hba:		adapter structure pointer
2316  * @update_kcqe:	kcqe pointer
2317  *
2318  * function callback exported via bnx2i - cnic driver interface to indicate
2319  *	async TCP events such as FIN
2320  */
2321 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2322 {
2323 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2324 
2325 	ep->state = EP_STATE_TCP_FIN_RCVD;
2326 	if (ep->conn)
2327 		bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2328 }
2329 
2330 /**
2331  * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2332  * @hba:		adapter structure pointer
2333  * @update_kcqe:	kcqe pointer
2334  *
2335  * function callback exported via bnx2i - cnic driver interface to
2336  *	indicate async TCP events (RST) sent by the peer.
2337  */
2338 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2339 {
2340 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2341 
2342 	ep->state = EP_STATE_TCP_RST_RCVD;
2343 	if (ep->conn)
2344 		bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2345 }
2346 
2347 
2348 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2349 			       char *buf, u16 buflen)
2350 {
2351 	struct bnx2i_hba *hba;
2352 
2353 	hba = bnx2i_find_hba_for_cnic(dev);
2354 	if (!hba)
2355 		return;
2356 
2357 	if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2358 				   msg_type, buf, buflen))
2359 		printk(KERN_ALERT "bnx2i: private nl message send error\n");
2360 
2361 }
2362 
2363 
2364 /**
2365  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2366  *			carrying callback function pointers
2367  *
2368  */
2369 struct cnic_ulp_ops bnx2i_cnic_cb = {
2370 	.cnic_init = bnx2i_ulp_init,
2371 	.cnic_exit = bnx2i_ulp_exit,
2372 	.cnic_start = bnx2i_start,
2373 	.cnic_stop = bnx2i_stop,
2374 	.indicate_kcqes = bnx2i_indicate_kcqe,
2375 	.indicate_netevent = bnx2i_indicate_netevent,
2376 	.cm_connect_complete = bnx2i_cm_connect_cmpl,
2377 	.cm_close_complete = bnx2i_cm_close_cmpl,
2378 	.cm_abort_complete = bnx2i_cm_abort_cmpl,
2379 	.cm_remote_close = bnx2i_cm_remote_close,
2380 	.cm_remote_abort = bnx2i_cm_remote_abort,
2381 	.iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2382 	.owner = THIS_MODULE
2383 };
2384 
2385 
2386 /**
2387  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2388  * @ep: bnx2i endpoint
2389  *
2390  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2391  *	register in BAR #0. Whereas in 57710 these register are accessed by
2392  *	mapping BAR #1
2393  */
2394 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2395 {
2396 	u32 cid_num;
2397 	u32 reg_off;
2398 	u32 first_l4l5;
2399 	u32 ctx_sz;
2400 	u32 config2;
2401 	resource_size_t reg_base;
2402 
2403 	cid_num = bnx2i_get_cid_num(ep);
2404 
2405 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2406 		reg_base = pci_resource_start(ep->hba->pcidev,
2407 					      BNX2X_DOORBELL_PCI_BAR);
2408 		reg_off = PAGE_SIZE * (cid_num & 0x1FFFF) + DPM_TRIGER_TYPE;
2409 		ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2410 		goto arm_cq;
2411 	}
2412 
2413 	reg_base = ep->hba->netdev->base_addr;
2414 	if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2415 	    (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2416 		config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2417 		first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2418 		ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2419 		if (ctx_sz)
2420 			reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2421 				  + BNX2I_570X_PAGE_SIZE_DEFAULT *
2422 				  (((cid_num - first_l4l5) / ctx_sz) + 256);
2423 		else
2424 			reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2425 	} else
2426 		/* 5709 device in normal node and 5706/5708 devices */
2427 		reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2428 
2429 	ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2430 					  MB_KERNEL_CTX_SIZE);
2431 	if (!ep->qp.ctx_base)
2432 		return -ENOMEM;
2433 
2434 arm_cq:
2435 	bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2436 	return 0;
2437 }
2438