1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic FCoE Offload Driver
4 * Copyright (c) 2016-2018 Cavium Inc.
5 */
6 #include <linux/init.h>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/pci.h>
10 #include <linux/device.h>
11 #include <linux/highmem.h>
12 #include <linux/crc32.h>
13 #include <linux/interrupt.h>
14 #include <linux/list.h>
15 #include <linux/kthread.h>
16 #include <linux/phylink.h>
17 #include <scsi/libfc.h>
18 #include <scsi/scsi_host.h>
19 #include <scsi/fc_frame.h>
20 #include <linux/if_ether.h>
21 #include <linux/if_vlan.h>
22 #include <linux/cpu.h>
23 #include "qedf.h"
24 #include "qedf_dbg.h"
25 #include <uapi/linux/pci_regs.h>
26
27 const struct qed_fcoe_ops *qed_ops;
28
29 static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id);
30 static void qedf_remove(struct pci_dev *pdev);
31 static void qedf_shutdown(struct pci_dev *pdev);
32 static void qedf_schedule_recovery_handler(void *dev);
33 static void qedf_recovery_handler(struct work_struct *work);
34 static int qedf_suspend(struct pci_dev *pdev, pm_message_t state);
35
36 /*
37 * Driver module parameters.
38 */
39 static unsigned int qedf_dev_loss_tmo = 60;
40 module_param_named(dev_loss_tmo, qedf_dev_loss_tmo, int, S_IRUGO);
41 MODULE_PARM_DESC(dev_loss_tmo, " dev_loss_tmo setting for attached "
42 "remote ports (default 60)");
43
44 uint qedf_debug = QEDF_LOG_INFO;
45 module_param_named(debug, qedf_debug, uint, S_IRUGO|S_IWUSR);
46 MODULE_PARM_DESC(debug, " Debug mask. Pass '1' to enable default debugging"
47 " mask");
48
49 static uint qedf_fipvlan_retries = 60;
50 module_param_named(fipvlan_retries, qedf_fipvlan_retries, int, S_IRUGO);
51 MODULE_PARM_DESC(fipvlan_retries, " Number of FIP VLAN requests to attempt "
52 "before giving up (default 60)");
53
54 static uint qedf_fallback_vlan = QEDF_FALLBACK_VLAN;
55 module_param_named(fallback_vlan, qedf_fallback_vlan, int, S_IRUGO);
56 MODULE_PARM_DESC(fallback_vlan, " VLAN ID to try if fip vlan request fails "
57 "(default 1002).");
58
59 static int qedf_default_prio = -1;
60 module_param_named(default_prio, qedf_default_prio, int, S_IRUGO);
61 MODULE_PARM_DESC(default_prio, " Override 802.1q priority for FIP and FCoE"
62 " traffic (value between 0 and 7, default 3).");
63
64 uint qedf_dump_frames;
65 module_param_named(dump_frames, qedf_dump_frames, int, S_IRUGO | S_IWUSR);
66 MODULE_PARM_DESC(dump_frames, " Print the skb data of FIP and FCoE frames "
67 "(default off)");
68
69 static uint qedf_queue_depth;
70 module_param_named(queue_depth, qedf_queue_depth, int, S_IRUGO);
71 MODULE_PARM_DESC(queue_depth, " Sets the queue depth for all LUNs discovered "
72 "by the qedf driver. Default is 0 (use OS default).");
73
74 uint qedf_io_tracing;
75 module_param_named(io_tracing, qedf_io_tracing, int, S_IRUGO | S_IWUSR);
76 MODULE_PARM_DESC(io_tracing, " Enable logging of SCSI requests/completions "
77 "into trace buffer. (default off).");
78
79 static uint qedf_max_lun = MAX_FIBRE_LUNS;
80 module_param_named(max_lun, qedf_max_lun, int, S_IRUGO);
81 MODULE_PARM_DESC(max_lun, " Sets the maximum luns per target that the driver "
82 "supports. (default 0xffffffff)");
83
84 uint qedf_link_down_tmo;
85 module_param_named(link_down_tmo, qedf_link_down_tmo, int, S_IRUGO);
86 MODULE_PARM_DESC(link_down_tmo, " Delays informing the fcoe transport that the "
87 "link is down by N seconds.");
88
89 bool qedf_retry_delay;
90 module_param_named(retry_delay, qedf_retry_delay, bool, S_IRUGO | S_IWUSR);
91 MODULE_PARM_DESC(retry_delay, " Enable/disable handling of FCP_RSP IU retry "
92 "delay handling (default off).");
93
94 static bool qedf_dcbx_no_wait;
95 module_param_named(dcbx_no_wait, qedf_dcbx_no_wait, bool, S_IRUGO | S_IWUSR);
96 MODULE_PARM_DESC(dcbx_no_wait, " Do not wait for DCBX convergence to start "
97 "sending FIP VLAN requests on link up (Default: off).");
98
99 static uint qedf_dp_module;
100 module_param_named(dp_module, qedf_dp_module, uint, S_IRUGO);
101 MODULE_PARM_DESC(dp_module, " bit flags control for verbose printk passed "
102 "qed module during probe.");
103
104 static uint qedf_dp_level = QED_LEVEL_NOTICE;
105 module_param_named(dp_level, qedf_dp_level, uint, S_IRUGO);
106 MODULE_PARM_DESC(dp_level, " printk verbosity control passed to qed module "
107 "during probe (0-3: 0 more verbose).");
108
109 static bool qedf_enable_recovery = true;
110 module_param_named(enable_recovery, qedf_enable_recovery,
111 bool, S_IRUGO | S_IWUSR);
112 MODULE_PARM_DESC(enable_recovery, "Enable/disable recovery on driver/firmware "
113 "interface level errors 0 = Disabled, 1 = Enabled (Default: 1).");
114
115 struct workqueue_struct *qedf_io_wq;
116
117 static struct fcoe_percpu_s qedf_global;
118 static DEFINE_SPINLOCK(qedf_global_lock);
119
120 static struct kmem_cache *qedf_io_work_cache;
121
qedf_set_vlan_id(struct qedf_ctx * qedf,int vlan_id)122 void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id)
123 {
124 int vlan_id_tmp = 0;
125
126 vlan_id_tmp = vlan_id | (qedf->prio << VLAN_PRIO_SHIFT);
127 qedf->vlan_id = vlan_id_tmp;
128 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
129 "Setting vlan_id=0x%04x prio=%d.\n",
130 vlan_id_tmp, qedf->prio);
131 }
132
133 /* Returns true if we have a valid vlan, false otherwise */
qedf_initiate_fipvlan_req(struct qedf_ctx * qedf)134 static bool qedf_initiate_fipvlan_req(struct qedf_ctx *qedf)
135 {
136
137 while (qedf->fipvlan_retries--) {
138 /* This is to catch if link goes down during fipvlan retries */
139 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
140 QEDF_ERR(&qedf->dbg_ctx, "Link not up.\n");
141 return false;
142 }
143
144 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
145 QEDF_ERR(&qedf->dbg_ctx, "Driver unloading.\n");
146 return false;
147 }
148
149 if (qedf->vlan_id > 0) {
150 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
151 "vlan = 0x%x already set, calling ctlr_link_up.\n",
152 qedf->vlan_id);
153 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP)
154 fcoe_ctlr_link_up(&qedf->ctlr);
155 return true;
156 }
157
158 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
159 "Retry %d.\n", qedf->fipvlan_retries);
160 init_completion(&qedf->fipvlan_compl);
161 qedf_fcoe_send_vlan_req(qedf);
162 wait_for_completion_timeout(&qedf->fipvlan_compl, 1 * HZ);
163 }
164
165 return false;
166 }
167
qedf_handle_link_update(struct work_struct * work)168 static void qedf_handle_link_update(struct work_struct *work)
169 {
170 struct qedf_ctx *qedf =
171 container_of(work, struct qedf_ctx, link_update.work);
172 int rc;
173
174 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC, "Entered. link_state=%d.\n",
175 atomic_read(&qedf->link_state));
176
177 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
178 rc = qedf_initiate_fipvlan_req(qedf);
179 if (rc)
180 return;
181
182 if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
183 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
184 "Link is down, resetting vlan_id.\n");
185 qedf->vlan_id = 0;
186 return;
187 }
188
189 /*
190 * If we get here then we never received a repsonse to our
191 * fip vlan request so set the vlan_id to the default and
192 * tell FCoE that the link is up
193 */
194 QEDF_WARN(&(qedf->dbg_ctx), "Did not receive FIP VLAN "
195 "response, falling back to default VLAN %d.\n",
196 qedf_fallback_vlan);
197 qedf_set_vlan_id(qedf, qedf_fallback_vlan);
198
199 /*
200 * Zero out data_src_addr so we'll update it with the new
201 * lport port_id
202 */
203 eth_zero_addr(qedf->data_src_addr);
204 fcoe_ctlr_link_up(&qedf->ctlr);
205 } else if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
206 /*
207 * If we hit here and link_down_tmo_valid is still 1 it means
208 * that link_down_tmo timed out so set it to 0 to make sure any
209 * other readers have accurate state.
210 */
211 atomic_set(&qedf->link_down_tmo_valid, 0);
212 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
213 "Calling fcoe_ctlr_link_down().\n");
214 fcoe_ctlr_link_down(&qedf->ctlr);
215 if (qedf_wait_for_upload(qedf) == false)
216 QEDF_ERR(&qedf->dbg_ctx,
217 "Could not upload all sessions.\n");
218 /* Reset the number of FIP VLAN retries */
219 qedf->fipvlan_retries = qedf_fipvlan_retries;
220 }
221 }
222
223 #define QEDF_FCOE_MAC_METHOD_GRANGED_MAC 1
224 #define QEDF_FCOE_MAC_METHOD_FCF_MAP 2
225 #define QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC 3
qedf_set_data_src_addr(struct qedf_ctx * qedf,struct fc_frame * fp)226 static void qedf_set_data_src_addr(struct qedf_ctx *qedf, struct fc_frame *fp)
227 {
228 u8 *granted_mac;
229 struct fc_frame_header *fh = fc_frame_header_get(fp);
230 u8 fc_map[3];
231 int method = 0;
232
233 /* Get granted MAC address from FIP FLOGI payload */
234 granted_mac = fr_cb(fp)->granted_mac;
235
236 /*
237 * We set the source MAC for FCoE traffic based on the Granted MAC
238 * address from the switch.
239 *
240 * If granted_mac is non-zero, we used that.
241 * If the granted_mac is zeroed out, created the FCoE MAC based on
242 * the sel_fcf->fc_map and the d_id fo the FLOGI frame.
243 * If sel_fcf->fc_map is 0 then we use the default FCF-MAC plus the
244 * d_id of the FLOGI frame.
245 */
246 if (!is_zero_ether_addr(granted_mac)) {
247 ether_addr_copy(qedf->data_src_addr, granted_mac);
248 method = QEDF_FCOE_MAC_METHOD_GRANGED_MAC;
249 } else if (qedf->ctlr.sel_fcf->fc_map != 0) {
250 hton24(fc_map, qedf->ctlr.sel_fcf->fc_map);
251 qedf->data_src_addr[0] = fc_map[0];
252 qedf->data_src_addr[1] = fc_map[1];
253 qedf->data_src_addr[2] = fc_map[2];
254 qedf->data_src_addr[3] = fh->fh_d_id[0];
255 qedf->data_src_addr[4] = fh->fh_d_id[1];
256 qedf->data_src_addr[5] = fh->fh_d_id[2];
257 method = QEDF_FCOE_MAC_METHOD_FCF_MAP;
258 } else {
259 fc_fcoe_set_mac(qedf->data_src_addr, fh->fh_d_id);
260 method = QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC;
261 }
262
263 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
264 "QEDF data_src_mac=%pM method=%d.\n", qedf->data_src_addr, method);
265 }
266
qedf_flogi_resp(struct fc_seq * seq,struct fc_frame * fp,void * arg)267 static void qedf_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
268 void *arg)
269 {
270 struct fc_exch *exch = fc_seq_exch(seq);
271 struct fc_lport *lport = exch->lp;
272 struct qedf_ctx *qedf = lport_priv(lport);
273
274 if (!qedf) {
275 QEDF_ERR(NULL, "qedf is NULL.\n");
276 return;
277 }
278
279 /*
280 * If ERR_PTR is set then don't try to stat anything as it will cause
281 * a crash when we access fp.
282 */
283 if (IS_ERR(fp)) {
284 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
285 "fp has IS_ERR() set.\n");
286 goto skip_stat;
287 }
288
289 /* Log stats for FLOGI reject */
290 if (fc_frame_payload_op(fp) == ELS_LS_RJT)
291 qedf->flogi_failed++;
292 else if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
293 /* Set the source MAC we will use for FCoE traffic */
294 qedf_set_data_src_addr(qedf, fp);
295 qedf->flogi_pending = 0;
296 }
297
298 /* Complete flogi_compl so we can proceed to sending ADISCs */
299 complete(&qedf->flogi_compl);
300
301 skip_stat:
302 /* Report response to libfc */
303 fc_lport_flogi_resp(seq, fp, lport);
304 }
305
qedf_elsct_send(struct fc_lport * lport,u32 did,struct fc_frame * fp,unsigned int op,void (* resp)(struct fc_seq *,struct fc_frame *,void *),void * arg,u32 timeout)306 static struct fc_seq *qedf_elsct_send(struct fc_lport *lport, u32 did,
307 struct fc_frame *fp, unsigned int op,
308 void (*resp)(struct fc_seq *,
309 struct fc_frame *,
310 void *),
311 void *arg, u32 timeout)
312 {
313 struct qedf_ctx *qedf = lport_priv(lport);
314
315 /*
316 * Intercept FLOGI for statistic purposes. Note we use the resp
317 * callback to tell if this is really a flogi.
318 */
319 if (resp == fc_lport_flogi_resp) {
320 qedf->flogi_cnt++;
321 qedf->flogi_pending++;
322
323 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
324 QEDF_ERR(&qedf->dbg_ctx, "Driver unloading\n");
325 qedf->flogi_pending = 0;
326 }
327
328 if (qedf->flogi_pending >= QEDF_FLOGI_RETRY_CNT) {
329 schedule_delayed_work(&qedf->stag_work, 2);
330 return NULL;
331 }
332
333 return fc_elsct_send(lport, did, fp, op, qedf_flogi_resp,
334 arg, timeout);
335 }
336
337 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
338 }
339
qedf_send_flogi(struct qedf_ctx * qedf)340 int qedf_send_flogi(struct qedf_ctx *qedf)
341 {
342 struct fc_lport *lport;
343 struct fc_frame *fp;
344
345 lport = qedf->lport;
346
347 if (!lport->tt.elsct_send) {
348 QEDF_ERR(&qedf->dbg_ctx, "tt.elsct_send not set.\n");
349 return -EINVAL;
350 }
351
352 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
353 if (!fp) {
354 QEDF_ERR(&(qedf->dbg_ctx), "fc_frame_alloc failed.\n");
355 return -ENOMEM;
356 }
357
358 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
359 "Sending FLOGI to reestablish session with switch.\n");
360 lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
361 ELS_FLOGI, qedf_flogi_resp, lport, lport->r_a_tov);
362
363 init_completion(&qedf->flogi_compl);
364
365 return 0;
366 }
367
368 /*
369 * This function is called if link_down_tmo is in use. If we get a link up and
370 * link_down_tmo has not expired then use just FLOGI/ADISC to recover our
371 * sessions with targets. Otherwise, just call fcoe_ctlr_link_up().
372 */
qedf_link_recovery(struct work_struct * work)373 static void qedf_link_recovery(struct work_struct *work)
374 {
375 struct qedf_ctx *qedf =
376 container_of(work, struct qedf_ctx, link_recovery.work);
377 struct fc_lport *lport = qedf->lport;
378 struct fc_rport_priv *rdata;
379 bool rc;
380 int retries = 30;
381 int rval, i;
382 struct list_head rdata_login_list;
383
384 INIT_LIST_HEAD(&rdata_login_list);
385
386 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
387 "Link down tmo did not expire.\n");
388
389 /*
390 * Essentially reset the fcoe_ctlr here without affecting the state
391 * of the libfc structs.
392 */
393 qedf->ctlr.state = FIP_ST_LINK_WAIT;
394 fcoe_ctlr_link_down(&qedf->ctlr);
395
396 /*
397 * Bring the link up before we send the fipvlan request so libfcoe
398 * can select a new fcf in parallel
399 */
400 fcoe_ctlr_link_up(&qedf->ctlr);
401
402 /* Since the link when down and up to verify which vlan we're on */
403 qedf->fipvlan_retries = qedf_fipvlan_retries;
404 rc = qedf_initiate_fipvlan_req(qedf);
405 /* If getting the VLAN fails, set the VLAN to the fallback one */
406 if (!rc)
407 qedf_set_vlan_id(qedf, qedf_fallback_vlan);
408
409 /*
410 * We need to wait for an FCF to be selected due to the
411 * fcoe_ctlr_link_up other the FLOGI will be rejected.
412 */
413 while (retries > 0) {
414 if (qedf->ctlr.sel_fcf) {
415 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
416 "FCF reselected, proceeding with FLOGI.\n");
417 break;
418 }
419 msleep(500);
420 retries--;
421 }
422
423 if (retries < 1) {
424 QEDF_ERR(&(qedf->dbg_ctx), "Exhausted retries waiting for "
425 "FCF selection.\n");
426 return;
427 }
428
429 rval = qedf_send_flogi(qedf);
430 if (rval)
431 return;
432
433 /* Wait for FLOGI completion before proceeding with sending ADISCs */
434 i = wait_for_completion_timeout(&qedf->flogi_compl,
435 qedf->lport->r_a_tov);
436 if (i == 0) {
437 QEDF_ERR(&(qedf->dbg_ctx), "FLOGI timed out.\n");
438 return;
439 }
440
441 /*
442 * Call lport->tt.rport_login which will cause libfc to send an
443 * ADISC since the rport is in state ready.
444 */
445 mutex_lock(&lport->disc.disc_mutex);
446 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
447 if (kref_get_unless_zero(&rdata->kref)) {
448 fc_rport_login(rdata);
449 kref_put(&rdata->kref, fc_rport_destroy);
450 }
451 }
452 mutex_unlock(&lport->disc.disc_mutex);
453 }
454
qedf_update_link_speed(struct qedf_ctx * qedf,struct qed_link_output * link)455 static void qedf_update_link_speed(struct qedf_ctx *qedf,
456 struct qed_link_output *link)
457 {
458 __ETHTOOL_DECLARE_LINK_MODE_MASK(sup_caps);
459 struct fc_lport *lport = qedf->lport;
460
461 lport->link_speed = FC_PORTSPEED_UNKNOWN;
462 lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
463
464 /* Set fc_host link speed */
465 switch (link->speed) {
466 case 10000:
467 lport->link_speed = FC_PORTSPEED_10GBIT;
468 break;
469 case 25000:
470 lport->link_speed = FC_PORTSPEED_25GBIT;
471 break;
472 case 40000:
473 lport->link_speed = FC_PORTSPEED_40GBIT;
474 break;
475 case 50000:
476 lport->link_speed = FC_PORTSPEED_50GBIT;
477 break;
478 case 100000:
479 lport->link_speed = FC_PORTSPEED_100GBIT;
480 break;
481 case 20000:
482 lport->link_speed = FC_PORTSPEED_20GBIT;
483 break;
484 default:
485 lport->link_speed = FC_PORTSPEED_UNKNOWN;
486 break;
487 }
488
489 /*
490 * Set supported link speed by querying the supported
491 * capabilities of the link.
492 */
493
494 phylink_zero(sup_caps);
495 phylink_set(sup_caps, 10000baseT_Full);
496 phylink_set(sup_caps, 10000baseKX4_Full);
497 phylink_set(sup_caps, 10000baseR_FEC);
498 phylink_set(sup_caps, 10000baseCR_Full);
499 phylink_set(sup_caps, 10000baseSR_Full);
500 phylink_set(sup_caps, 10000baseLR_Full);
501 phylink_set(sup_caps, 10000baseLRM_Full);
502 phylink_set(sup_caps, 10000baseKR_Full);
503
504 if (linkmode_intersects(link->supported_caps, sup_caps))
505 lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
506
507 phylink_zero(sup_caps);
508 phylink_set(sup_caps, 25000baseKR_Full);
509 phylink_set(sup_caps, 25000baseCR_Full);
510 phylink_set(sup_caps, 25000baseSR_Full);
511
512 if (linkmode_intersects(link->supported_caps, sup_caps))
513 lport->link_supported_speeds |= FC_PORTSPEED_25GBIT;
514
515 phylink_zero(sup_caps);
516 phylink_set(sup_caps, 40000baseLR4_Full);
517 phylink_set(sup_caps, 40000baseKR4_Full);
518 phylink_set(sup_caps, 40000baseCR4_Full);
519 phylink_set(sup_caps, 40000baseSR4_Full);
520
521 if (linkmode_intersects(link->supported_caps, sup_caps))
522 lport->link_supported_speeds |= FC_PORTSPEED_40GBIT;
523
524 phylink_zero(sup_caps);
525 phylink_set(sup_caps, 50000baseKR2_Full);
526 phylink_set(sup_caps, 50000baseCR2_Full);
527 phylink_set(sup_caps, 50000baseSR2_Full);
528
529 if (linkmode_intersects(link->supported_caps, sup_caps))
530 lport->link_supported_speeds |= FC_PORTSPEED_50GBIT;
531
532 phylink_zero(sup_caps);
533 phylink_set(sup_caps, 100000baseKR4_Full);
534 phylink_set(sup_caps, 100000baseSR4_Full);
535 phylink_set(sup_caps, 100000baseCR4_Full);
536 phylink_set(sup_caps, 100000baseLR4_ER4_Full);
537
538 if (linkmode_intersects(link->supported_caps, sup_caps))
539 lport->link_supported_speeds |= FC_PORTSPEED_100GBIT;
540
541 phylink_zero(sup_caps);
542 phylink_set(sup_caps, 20000baseKR2_Full);
543
544 if (linkmode_intersects(link->supported_caps, sup_caps))
545 lport->link_supported_speeds |= FC_PORTSPEED_20GBIT;
546
547 if (lport->host && lport->host->shost_data)
548 fc_host_supported_speeds(lport->host) =
549 lport->link_supported_speeds;
550 }
551
qedf_bw_update(void * dev)552 static void qedf_bw_update(void *dev)
553 {
554 struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
555 struct qed_link_output link;
556
557 /* Get the latest status of the link */
558 qed_ops->common->get_link(qedf->cdev, &link);
559
560 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
561 QEDF_ERR(&qedf->dbg_ctx,
562 "Ignore link update, driver getting unload.\n");
563 return;
564 }
565
566 if (link.link_up) {
567 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP)
568 qedf_update_link_speed(qedf, &link);
569 else
570 QEDF_ERR(&qedf->dbg_ctx,
571 "Ignore bw update, link is down.\n");
572
573 } else {
574 QEDF_ERR(&qedf->dbg_ctx, "link_up is not set.\n");
575 }
576 }
577
qedf_link_update(void * dev,struct qed_link_output * link)578 static void qedf_link_update(void *dev, struct qed_link_output *link)
579 {
580 struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
581
582 /*
583 * Prevent race where we're removing the module and we get link update
584 * for qed.
585 */
586 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
587 QEDF_ERR(&qedf->dbg_ctx,
588 "Ignore link update, driver getting unload.\n");
589 return;
590 }
591
592 if (link->link_up) {
593 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
594 QEDF_INFO((&qedf->dbg_ctx), QEDF_LOG_DISC,
595 "Ignoring link up event as link is already up.\n");
596 return;
597 }
598 QEDF_ERR(&(qedf->dbg_ctx), "LINK UP (%d GB/s).\n",
599 link->speed / 1000);
600
601 /* Cancel any pending link down work */
602 cancel_delayed_work(&qedf->link_update);
603
604 atomic_set(&qedf->link_state, QEDF_LINK_UP);
605 qedf_update_link_speed(qedf, link);
606
607 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE ||
608 qedf_dcbx_no_wait) {
609 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
610 "DCBx done.\n");
611 if (atomic_read(&qedf->link_down_tmo_valid) > 0)
612 queue_delayed_work(qedf->link_update_wq,
613 &qedf->link_recovery, 0);
614 else
615 queue_delayed_work(qedf->link_update_wq,
616 &qedf->link_update, 0);
617 atomic_set(&qedf->link_down_tmo_valid, 0);
618 }
619
620 } else {
621 QEDF_ERR(&(qedf->dbg_ctx), "LINK DOWN.\n");
622
623 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
624 atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
625 /*
626 * Flag that we're waiting for the link to come back up before
627 * informing the fcoe layer of the event.
628 */
629 if (qedf_link_down_tmo > 0) {
630 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
631 "Starting link down tmo.\n");
632 atomic_set(&qedf->link_down_tmo_valid, 1);
633 }
634 qedf->vlan_id = 0;
635 qedf_update_link_speed(qedf, link);
636 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
637 qedf_link_down_tmo * HZ);
638 }
639 }
640
641
qedf_dcbx_handler(void * dev,struct qed_dcbx_get * get,u32 mib_type)642 static void qedf_dcbx_handler(void *dev, struct qed_dcbx_get *get, u32 mib_type)
643 {
644 struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
645 u8 tmp_prio;
646
647 QEDF_ERR(&(qedf->dbg_ctx), "DCBx event valid=%d enabled=%d fcoe "
648 "prio=%d.\n", get->operational.valid, get->operational.enabled,
649 get->operational.app_prio.fcoe);
650
651 if (get->operational.enabled && get->operational.valid) {
652 /* If DCBX was already negotiated on link up then just exit */
653 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
654 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
655 "DCBX already set on link up.\n");
656 return;
657 }
658
659 atomic_set(&qedf->dcbx, QEDF_DCBX_DONE);
660
661 /*
662 * Set the 8021q priority in the following manner:
663 *
664 * 1. If a modparam is set use that
665 * 2. If the value is not between 0..7 use the default
666 * 3. Use the priority we get from the DCBX app tag
667 */
668 tmp_prio = get->operational.app_prio.fcoe;
669 if (qedf_default_prio > -1)
670 qedf->prio = qedf_default_prio;
671 else if (tmp_prio > 7) {
672 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
673 "FIP/FCoE prio %d out of range, setting to %d.\n",
674 tmp_prio, QEDF_DEFAULT_PRIO);
675 qedf->prio = QEDF_DEFAULT_PRIO;
676 } else
677 qedf->prio = tmp_prio;
678
679 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP &&
680 !qedf_dcbx_no_wait) {
681 if (atomic_read(&qedf->link_down_tmo_valid) > 0)
682 queue_delayed_work(qedf->link_update_wq,
683 &qedf->link_recovery, 0);
684 else
685 queue_delayed_work(qedf->link_update_wq,
686 &qedf->link_update, 0);
687 atomic_set(&qedf->link_down_tmo_valid, 0);
688 }
689 }
690
691 }
692
qedf_get_login_failures(void * cookie)693 static u32 qedf_get_login_failures(void *cookie)
694 {
695 struct qedf_ctx *qedf;
696
697 qedf = (struct qedf_ctx *)cookie;
698 return qedf->flogi_failed;
699 }
700
701 static struct qed_fcoe_cb_ops qedf_cb_ops = {
702 {
703 .link_update = qedf_link_update,
704 .bw_update = qedf_bw_update,
705 .schedule_recovery_handler = qedf_schedule_recovery_handler,
706 .dcbx_aen = qedf_dcbx_handler,
707 .get_generic_tlv_data = qedf_get_generic_tlv_data,
708 .get_protocol_tlv_data = qedf_get_protocol_tlv_data,
709 .schedule_hw_err_handler = qedf_schedule_hw_err_handler,
710 }
711 };
712
713 /*
714 * Various transport templates.
715 */
716
717 static struct scsi_transport_template *qedf_fc_transport_template;
718 static struct scsi_transport_template *qedf_fc_vport_transport_template;
719
720 /*
721 * SCSI EH handlers
722 */
qedf_eh_abort(struct scsi_cmnd * sc_cmd)723 static int qedf_eh_abort(struct scsi_cmnd *sc_cmd)
724 {
725 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
726 struct fc_lport *lport;
727 struct qedf_ctx *qedf;
728 struct qedf_ioreq *io_req;
729 struct fc_rport_libfc_priv *rp = rport->dd_data;
730 struct fc_rport_priv *rdata;
731 struct qedf_rport *fcport = NULL;
732 int rc = FAILED;
733 int wait_count = 100;
734 int refcount = 0;
735 int rval;
736 int got_ref = 0;
737
738 lport = shost_priv(sc_cmd->device->host);
739 qedf = (struct qedf_ctx *)lport_priv(lport);
740
741 /* rport and tgt are allocated together, so tgt should be non-NULL */
742 fcport = (struct qedf_rport *)&rp[1];
743 rdata = fcport->rdata;
744 if (!rdata || !kref_get_unless_zero(&rdata->kref)) {
745 QEDF_ERR(&qedf->dbg_ctx, "stale rport, sc_cmd=%p\n", sc_cmd);
746 rc = SUCCESS;
747 goto out;
748 }
749
750
751 io_req = qedf_priv(sc_cmd)->io_req;
752 if (!io_req) {
753 QEDF_ERR(&qedf->dbg_ctx,
754 "sc_cmd not queued with lld, sc_cmd=%p op=0x%02x, port_id=%06x\n",
755 sc_cmd, sc_cmd->cmnd[0],
756 rdata->ids.port_id);
757 rc = SUCCESS;
758 goto drop_rdata_kref;
759 }
760
761 rval = kref_get_unless_zero(&io_req->refcount); /* ID: 005 */
762 if (rval)
763 got_ref = 1;
764
765 /* If we got a valid io_req, confirm it belongs to this sc_cmd. */
766 if (!rval || io_req->sc_cmd != sc_cmd) {
767 QEDF_ERR(&qedf->dbg_ctx,
768 "Freed/Incorrect io_req, io_req->sc_cmd=%p, sc_cmd=%p, port_id=%06x, bailing out.\n",
769 io_req->sc_cmd, sc_cmd, rdata->ids.port_id);
770
771 goto drop_rdata_kref;
772 }
773
774 if (fc_remote_port_chkready(rport)) {
775 refcount = kref_read(&io_req->refcount);
776 QEDF_ERR(&qedf->dbg_ctx,
777 "rport not ready, io_req=%p, xid=0x%x sc_cmd=%p op=0x%02x, refcount=%d, port_id=%06x\n",
778 io_req, io_req->xid, sc_cmd, sc_cmd->cmnd[0],
779 refcount, rdata->ids.port_id);
780
781 goto drop_rdata_kref;
782 }
783
784 rc = fc_block_rport(rport);
785 if (rc)
786 goto drop_rdata_kref;
787
788 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
789 QEDF_ERR(&qedf->dbg_ctx,
790 "Connection uploading, xid=0x%x., port_id=%06x\n",
791 io_req->xid, rdata->ids.port_id);
792 while (io_req->sc_cmd && (wait_count != 0)) {
793 msleep(100);
794 wait_count--;
795 }
796 if (wait_count) {
797 QEDF_ERR(&qedf->dbg_ctx, "ABTS succeeded\n");
798 rc = SUCCESS;
799 } else {
800 QEDF_ERR(&qedf->dbg_ctx, "ABTS failed\n");
801 rc = FAILED;
802 }
803 goto drop_rdata_kref;
804 }
805
806 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
807 QEDF_ERR(&qedf->dbg_ctx, "link not ready.\n");
808 goto drop_rdata_kref;
809 }
810
811 QEDF_ERR(&qedf->dbg_ctx,
812 "Aborting io_req=%p sc_cmd=%p xid=0x%x fp_idx=%d, port_id=%06x.\n",
813 io_req, sc_cmd, io_req->xid, io_req->fp_idx,
814 rdata->ids.port_id);
815
816 if (qedf->stop_io_on_error) {
817 qedf_stop_all_io(qedf);
818 rc = SUCCESS;
819 goto drop_rdata_kref;
820 }
821
822 init_completion(&io_req->abts_done);
823 rval = qedf_initiate_abts(io_req, true);
824 if (rval) {
825 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
826 /*
827 * If we fail to queue the ABTS then return this command to
828 * the SCSI layer as it will own and free the xid
829 */
830 rc = SUCCESS;
831 qedf_scsi_done(qedf, io_req, DID_ERROR);
832 goto drop_rdata_kref;
833 }
834
835 wait_for_completion(&io_req->abts_done);
836
837 if (io_req->event == QEDF_IOREQ_EV_ABORT_SUCCESS ||
838 io_req->event == QEDF_IOREQ_EV_ABORT_FAILED ||
839 io_req->event == QEDF_IOREQ_EV_CLEANUP_SUCCESS) {
840 /*
841 * If we get a reponse to the abort this is success from
842 * the perspective that all references to the command have
843 * been removed from the driver and firmware
844 */
845 rc = SUCCESS;
846 } else {
847 /* If the abort and cleanup failed then return a failure */
848 rc = FAILED;
849 }
850
851 if (rc == SUCCESS)
852 QEDF_ERR(&(qedf->dbg_ctx), "ABTS succeeded, xid=0x%x.\n",
853 io_req->xid);
854 else
855 QEDF_ERR(&(qedf->dbg_ctx), "ABTS failed, xid=0x%x.\n",
856 io_req->xid);
857
858 drop_rdata_kref:
859 kref_put(&rdata->kref, fc_rport_destroy);
860 out:
861 if (got_ref)
862 kref_put(&io_req->refcount, qedf_release_cmd);
863 return rc;
864 }
865
qedf_eh_target_reset(struct scsi_cmnd * sc_cmd)866 static int qedf_eh_target_reset(struct scsi_cmnd *sc_cmd)
867 {
868 struct scsi_target *starget = scsi_target(sc_cmd->device);
869 struct fc_rport *rport = starget_to_rport(starget);
870
871 QEDF_ERR(NULL, "TARGET RESET Issued...");
872 return qedf_initiate_tmf(rport, 0, FCP_TMF_TGT_RESET);
873 }
874
qedf_eh_device_reset(struct scsi_cmnd * sc_cmd)875 static int qedf_eh_device_reset(struct scsi_cmnd *sc_cmd)
876 {
877 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
878
879 QEDF_ERR(NULL, "LUN RESET Issued...\n");
880 return qedf_initiate_tmf(rport, sc_cmd->device->lun, FCP_TMF_LUN_RESET);
881 }
882
qedf_wait_for_upload(struct qedf_ctx * qedf)883 bool qedf_wait_for_upload(struct qedf_ctx *qedf)
884 {
885 struct qedf_rport *fcport;
886 int wait_cnt = 120;
887
888 while (wait_cnt--) {
889 if (atomic_read(&qedf->num_offloads))
890 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
891 "Waiting for all uploads to complete num_offloads = 0x%x.\n",
892 atomic_read(&qedf->num_offloads));
893 else
894 return true;
895 msleep(500);
896 }
897
898 rcu_read_lock();
899 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
900 if (test_bit(QEDF_RPORT_SESSION_READY,
901 &fcport->flags)) {
902 if (fcport->rdata)
903 QEDF_ERR(&qedf->dbg_ctx,
904 "Waiting for fcport %p portid=%06x.\n",
905 fcport, fcport->rdata->ids.port_id);
906 } else {
907 QEDF_ERR(&qedf->dbg_ctx,
908 "Waiting for fcport %p.\n", fcport);
909 }
910 }
911
912 rcu_read_unlock();
913 return false;
914 }
915
916 /* Performs soft reset of qedf_ctx by simulating a link down/up */
qedf_ctx_soft_reset(struct fc_lport * lport)917 void qedf_ctx_soft_reset(struct fc_lport *lport)
918 {
919 struct qedf_ctx *qedf;
920 struct qed_link_output if_link;
921
922 qedf = lport_priv(lport);
923
924 if (lport->vport) {
925 clear_bit(QEDF_STAG_IN_PROGRESS, &qedf->flags);
926 printk_ratelimited("Cannot issue host reset on NPIV port.\n");
927 return;
928 }
929
930 qedf->flogi_pending = 0;
931 /* For host reset, essentially do a soft link up/down */
932 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
933 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
934 "Queuing link down work.\n");
935 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
936 0);
937
938 if (qedf_wait_for_upload(qedf) == false) {
939 QEDF_ERR(&qedf->dbg_ctx, "Could not upload all sessions.\n");
940 WARN_ON(atomic_read(&qedf->num_offloads));
941 }
942
943 /* Before setting link up query physical link state */
944 qed_ops->common->get_link(qedf->cdev, &if_link);
945 /* Bail if the physical link is not up */
946 if (!if_link.link_up) {
947 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
948 "Physical link is not up.\n");
949 clear_bit(QEDF_STAG_IN_PROGRESS, &qedf->flags);
950 return;
951 }
952 /* Flush and wait to make sure link down is processed */
953 flush_delayed_work(&qedf->link_update);
954 msleep(500);
955
956 atomic_set(&qedf->link_state, QEDF_LINK_UP);
957 qedf->vlan_id = 0;
958 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
959 "Queue link up work.\n");
960 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
961 0);
962 clear_bit(QEDF_STAG_IN_PROGRESS, &qedf->flags);
963 }
964
965 /* Reset the host by gracefully logging out and then logging back in */
qedf_eh_host_reset(struct scsi_cmnd * sc_cmd)966 static int qedf_eh_host_reset(struct scsi_cmnd *sc_cmd)
967 {
968 struct fc_lport *lport;
969 struct qedf_ctx *qedf;
970
971 lport = shost_priv(sc_cmd->device->host);
972 qedf = lport_priv(lport);
973
974 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN ||
975 test_bit(QEDF_UNLOADING, &qedf->flags))
976 return FAILED;
977
978 QEDF_ERR(&(qedf->dbg_ctx), "HOST RESET Issued...");
979
980 qedf_ctx_soft_reset(lport);
981
982 return SUCCESS;
983 }
984
qedf_sdev_configure(struct scsi_device * sdev,struct queue_limits * lim)985 static int qedf_sdev_configure(struct scsi_device *sdev,
986 struct queue_limits *lim)
987 {
988 if (qedf_queue_depth) {
989 scsi_change_queue_depth(sdev, qedf_queue_depth);
990 }
991
992 return 0;
993 }
994
995 static const struct scsi_host_template qedf_host_template = {
996 .module = THIS_MODULE,
997 .name = QEDF_MODULE_NAME,
998 .this_id = -1,
999 .cmd_per_lun = 32,
1000 .max_sectors = 0xffff,
1001 .queuecommand = qedf_queuecommand,
1002 .shost_groups = qedf_host_groups,
1003 .eh_abort_handler = qedf_eh_abort,
1004 .eh_device_reset_handler = qedf_eh_device_reset, /* lun reset */
1005 .eh_target_reset_handler = qedf_eh_target_reset, /* target reset */
1006 .eh_host_reset_handler = qedf_eh_host_reset,
1007 .sdev_configure = qedf_sdev_configure,
1008 .dma_boundary = QED_HW_DMA_BOUNDARY,
1009 .sg_tablesize = QEDF_MAX_BDS_PER_CMD,
1010 .can_queue = FCOE_PARAMS_NUM_TASKS,
1011 .change_queue_depth = scsi_change_queue_depth,
1012 .cmd_size = sizeof(struct qedf_cmd_priv),
1013 };
1014
qedf_get_paged_crc_eof(struct sk_buff * skb,int tlen)1015 static int qedf_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1016 {
1017 int rc;
1018
1019 spin_lock(&qedf_global_lock);
1020 rc = fcoe_get_paged_crc_eof(skb, tlen, &qedf_global);
1021 spin_unlock(&qedf_global_lock);
1022
1023 return rc;
1024 }
1025
qedf_fcport_lookup(struct qedf_ctx * qedf,u32 port_id)1026 static struct qedf_rport *qedf_fcport_lookup(struct qedf_ctx *qedf, u32 port_id)
1027 {
1028 struct qedf_rport *fcport;
1029 struct fc_rport_priv *rdata;
1030
1031 rcu_read_lock();
1032 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
1033 rdata = fcport->rdata;
1034 if (rdata == NULL)
1035 continue;
1036 if (rdata->ids.port_id == port_id) {
1037 rcu_read_unlock();
1038 return fcport;
1039 }
1040 }
1041 rcu_read_unlock();
1042
1043 /* Return NULL to caller to let them know fcport was not found */
1044 return NULL;
1045 }
1046
1047 /* Transmits an ELS frame over an offloaded session */
qedf_xmit_l2_frame(struct qedf_rport * fcport,struct fc_frame * fp)1048 static int qedf_xmit_l2_frame(struct qedf_rport *fcport, struct fc_frame *fp)
1049 {
1050 struct fc_frame_header *fh;
1051 int rc = 0;
1052
1053 fh = fc_frame_header_get(fp);
1054 if ((fh->fh_type == FC_TYPE_ELS) &&
1055 (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
1056 switch (fc_frame_payload_op(fp)) {
1057 case ELS_ADISC:
1058 qedf_send_adisc(fcport, fp);
1059 rc = 1;
1060 break;
1061 }
1062 }
1063
1064 return rc;
1065 }
1066
1067 /*
1068 * qedf_xmit - qedf FCoE frame transmit function
1069 */
qedf_xmit(struct fc_lport * lport,struct fc_frame * fp)1070 static int qedf_xmit(struct fc_lport *lport, struct fc_frame *fp)
1071 {
1072 struct fc_lport *base_lport;
1073 struct qedf_ctx *qedf;
1074 struct ethhdr *eh;
1075 struct fcoe_crc_eof *cp;
1076 struct sk_buff *skb;
1077 struct fc_frame_header *fh;
1078 struct fcoe_hdr *hp;
1079 u8 sof, eof;
1080 u32 crc;
1081 unsigned int hlen, tlen, elen;
1082 int wlen;
1083 struct fc_lport *tmp_lport;
1084 struct fc_lport *vn_port = NULL;
1085 struct qedf_rport *fcport;
1086 int rc;
1087 u16 vlan_tci = 0;
1088
1089 qedf = (struct qedf_ctx *)lport_priv(lport);
1090
1091 fh = fc_frame_header_get(fp);
1092 skb = fp_skb(fp);
1093
1094 /* Filter out traffic to other NPIV ports on the same host */
1095 if (lport->vport)
1096 base_lport = shost_priv(vport_to_shost(lport->vport));
1097 else
1098 base_lport = lport;
1099
1100 /* Flag if the destination is the base port */
1101 if (base_lport->port_id == ntoh24(fh->fh_d_id)) {
1102 vn_port = base_lport;
1103 } else {
1104 /* Got through the list of vports attached to the base_lport
1105 * and see if we have a match with the destination address.
1106 */
1107 list_for_each_entry(tmp_lport, &base_lport->vports, list) {
1108 if (tmp_lport->port_id == ntoh24(fh->fh_d_id)) {
1109 vn_port = tmp_lport;
1110 break;
1111 }
1112 }
1113 }
1114 if (vn_port && ntoh24(fh->fh_d_id) != FC_FID_FLOGI) {
1115 struct fc_rport_priv *rdata = NULL;
1116
1117 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
1118 "Dropping FCoE frame to %06x.\n", ntoh24(fh->fh_d_id));
1119 kfree_skb(skb);
1120 rdata = fc_rport_lookup(lport, ntoh24(fh->fh_d_id));
1121 if (rdata) {
1122 rdata->retries = lport->max_rport_retry_count;
1123 kref_put(&rdata->kref, fc_rport_destroy);
1124 }
1125 return -EINVAL;
1126 }
1127 /* End NPIV filtering */
1128
1129 if (!qedf->ctlr.sel_fcf) {
1130 kfree_skb(skb);
1131 return 0;
1132 }
1133
1134 if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
1135 QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
1136 kfree_skb(skb);
1137 return 0;
1138 }
1139
1140 if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
1141 QEDF_WARN(&(qedf->dbg_ctx), "qedf link down\n");
1142 kfree_skb(skb);
1143 return 0;
1144 }
1145
1146 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
1147 if (fcoe_ctlr_els_send(&qedf->ctlr, lport, skb))
1148 return 0;
1149 }
1150
1151 /* Check to see if this needs to be sent on an offloaded session */
1152 fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
1153
1154 if (fcport && test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1155 rc = qedf_xmit_l2_frame(fcport, fp);
1156 /*
1157 * If the frame was successfully sent over the middle path
1158 * then do not try to also send it over the LL2 path
1159 */
1160 if (rc)
1161 return 0;
1162 }
1163
1164 sof = fr_sof(fp);
1165 eof = fr_eof(fp);
1166
1167 elen = sizeof(struct ethhdr);
1168 hlen = sizeof(struct fcoe_hdr);
1169 tlen = sizeof(struct fcoe_crc_eof);
1170 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1171
1172 skb->ip_summed = CHECKSUM_NONE;
1173 crc = fcoe_fc_crc(fp);
1174
1175 /* copy port crc and eof to the skb buff */
1176 if (skb_is_nonlinear(skb)) {
1177 skb_frag_t *frag;
1178
1179 if (qedf_get_paged_crc_eof(skb, tlen)) {
1180 kfree_skb(skb);
1181 return -ENOMEM;
1182 }
1183 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1184 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);
1185 } else {
1186 cp = skb_put(skb, tlen);
1187 }
1188
1189 memset(cp, 0, sizeof(*cp));
1190 cp->fcoe_eof = eof;
1191 cp->fcoe_crc32 = cpu_to_le32(~crc);
1192 if (skb_is_nonlinear(skb)) {
1193 kunmap_atomic(cp);
1194 cp = NULL;
1195 }
1196
1197
1198 /* adjust skb network/transport offsets to match mac/fcoe/port */
1199 skb_push(skb, elen + hlen);
1200 skb_reset_mac_header(skb);
1201 skb_reset_network_header(skb);
1202 skb->mac_len = elen;
1203 skb->protocol = htons(ETH_P_FCOE);
1204
1205 /*
1206 * Add VLAN tag to non-offload FCoE frame based on current stored VLAN
1207 * for FIP/FCoE traffic.
1208 */
1209 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), qedf->vlan_id);
1210
1211 /* fill up mac and fcoe headers */
1212 eh = eth_hdr(skb);
1213 eh->h_proto = htons(ETH_P_FCOE);
1214 if (qedf->ctlr.map_dest)
1215 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1216 else
1217 /* insert GW address */
1218 ether_addr_copy(eh->h_dest, qedf->ctlr.dest_addr);
1219
1220 /* Set the source MAC address */
1221 ether_addr_copy(eh->h_source, qedf->data_src_addr);
1222
1223 hp = (struct fcoe_hdr *)(eh + 1);
1224 memset(hp, 0, sizeof(*hp));
1225 if (FC_FCOE_VER)
1226 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1227 hp->fcoe_sof = sof;
1228
1229 /*update tx stats */
1230 this_cpu_inc(lport->stats->TxFrames);
1231 this_cpu_add(lport->stats->TxWords, wlen);
1232
1233 /* Get VLAN ID from skb for printing purposes */
1234 __vlan_hwaccel_get_tag(skb, &vlan_tci);
1235
1236 /* send down to lld */
1237 fr_dev(fp) = lport;
1238 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame send: "
1239 "src=%06x dest=%06x r_ctl=%x type=%x vlan=%04x.\n",
1240 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, fh->fh_type,
1241 vlan_tci);
1242 if (qedf_dump_frames)
1243 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
1244 1, skb->data, skb->len, false);
1245 rc = qed_ops->ll2->start_xmit(qedf->cdev, skb, 0);
1246 if (rc) {
1247 QEDF_ERR(&qedf->dbg_ctx, "start_xmit failed rc = %d.\n", rc);
1248 kfree_skb(skb);
1249 return rc;
1250 }
1251
1252 return 0;
1253 }
1254
qedf_alloc_sq(struct qedf_ctx * qedf,struct qedf_rport * fcport)1255 static int qedf_alloc_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
1256 {
1257 int rval = 0;
1258 u32 *pbl;
1259 dma_addr_t page;
1260 int num_pages;
1261
1262 /* Calculate appropriate queue and PBL sizes */
1263 fcport->sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
1264 fcport->sq_mem_size = ALIGN(fcport->sq_mem_size, QEDF_PAGE_SIZE);
1265 fcport->sq_pbl_size = (fcport->sq_mem_size / QEDF_PAGE_SIZE) *
1266 sizeof(void *);
1267 fcport->sq_pbl_size = fcport->sq_pbl_size + QEDF_PAGE_SIZE;
1268
1269 fcport->sq = dma_alloc_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
1270 &fcport->sq_dma, GFP_KERNEL);
1271 if (!fcport->sq) {
1272 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue.\n");
1273 rval = 1;
1274 goto out;
1275 }
1276
1277 fcport->sq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
1278 fcport->sq_pbl_size,
1279 &fcport->sq_pbl_dma, GFP_KERNEL);
1280 if (!fcport->sq_pbl) {
1281 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue PBL.\n");
1282 rval = 1;
1283 goto out_free_sq;
1284 }
1285
1286 /* Create PBL */
1287 num_pages = fcport->sq_mem_size / QEDF_PAGE_SIZE;
1288 page = fcport->sq_dma;
1289 pbl = (u32 *)fcport->sq_pbl;
1290
1291 while (num_pages--) {
1292 *pbl = U64_LO(page);
1293 pbl++;
1294 *pbl = U64_HI(page);
1295 pbl++;
1296 page += QEDF_PAGE_SIZE;
1297 }
1298
1299 return rval;
1300
1301 out_free_sq:
1302 dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size, fcport->sq,
1303 fcport->sq_dma);
1304 out:
1305 return rval;
1306 }
1307
qedf_free_sq(struct qedf_ctx * qedf,struct qedf_rport * fcport)1308 static void qedf_free_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
1309 {
1310 if (fcport->sq_pbl)
1311 dma_free_coherent(&qedf->pdev->dev, fcport->sq_pbl_size,
1312 fcport->sq_pbl, fcport->sq_pbl_dma);
1313 if (fcport->sq)
1314 dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
1315 fcport->sq, fcport->sq_dma);
1316 }
1317
qedf_offload_connection(struct qedf_ctx * qedf,struct qedf_rport * fcport)1318 static int qedf_offload_connection(struct qedf_ctx *qedf,
1319 struct qedf_rport *fcport)
1320 {
1321 struct qed_fcoe_params_offload conn_info;
1322 u32 port_id;
1323 int rval;
1324 uint16_t total_sqe = (fcport->sq_mem_size / sizeof(struct fcoe_wqe));
1325
1326 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offloading connection "
1327 "portid=%06x.\n", fcport->rdata->ids.port_id);
1328 rval = qed_ops->acquire_conn(qedf->cdev, &fcport->handle,
1329 &fcport->fw_cid, &fcport->p_doorbell);
1330 if (rval) {
1331 QEDF_WARN(&(qedf->dbg_ctx), "Could not acquire connection "
1332 "for portid=%06x.\n", fcport->rdata->ids.port_id);
1333 rval = 1; /* For some reason qed returns 0 on failure here */
1334 goto out;
1335 }
1336
1337 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "portid=%06x "
1338 "fw_cid=%08x handle=%d.\n", fcport->rdata->ids.port_id,
1339 fcport->fw_cid, fcport->handle);
1340
1341 memset(&conn_info, 0, sizeof(struct qed_fcoe_params_offload));
1342
1343 /* Fill in the offload connection info */
1344 conn_info.sq_pbl_addr = fcport->sq_pbl_dma;
1345
1346 conn_info.sq_curr_page_addr = (dma_addr_t)(*(u64 *)fcport->sq_pbl);
1347 conn_info.sq_next_page_addr =
1348 (dma_addr_t)(*(u64 *)(fcport->sq_pbl + 8));
1349
1350 /* Need to use our FCoE MAC for the offload session */
1351 ether_addr_copy(conn_info.src_mac, qedf->data_src_addr);
1352
1353 ether_addr_copy(conn_info.dst_mac, qedf->ctlr.dest_addr);
1354
1355 conn_info.tx_max_fc_pay_len = fcport->rdata->maxframe_size;
1356 conn_info.e_d_tov_timer_val = qedf->lport->e_d_tov;
1357 conn_info.rec_tov_timer_val = 3; /* I think this is what E3 was */
1358 conn_info.rx_max_fc_pay_len = fcport->rdata->maxframe_size;
1359
1360 /* Set VLAN data */
1361 conn_info.vlan_tag = qedf->vlan_id <<
1362 FCOE_CONN_OFFLOAD_RAMROD_DATA_VLAN_ID_SHIFT;
1363 conn_info.vlan_tag |=
1364 qedf->prio << FCOE_CONN_OFFLOAD_RAMROD_DATA_PRIORITY_SHIFT;
1365 conn_info.flags |= (FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_MASK <<
1366 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_SHIFT);
1367
1368 /* Set host port source id */
1369 port_id = fc_host_port_id(qedf->lport->host);
1370 fcport->sid = port_id;
1371 conn_info.s_id.addr_hi = (port_id & 0x000000FF);
1372 conn_info.s_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1373 conn_info.s_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1374
1375 conn_info.max_conc_seqs_c3 = fcport->rdata->max_seq;
1376
1377 /* Set remote port destination id */
1378 port_id = fcport->rdata->rport->port_id;
1379 conn_info.d_id.addr_hi = (port_id & 0x000000FF);
1380 conn_info.d_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1381 conn_info.d_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1382
1383 conn_info.def_q_idx = 0; /* Default index for send queue? */
1384
1385 /* Set FC-TAPE specific flags if needed */
1386 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
1387 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN,
1388 "Enable CONF, REC for portid=%06x.\n",
1389 fcport->rdata->ids.port_id);
1390 conn_info.flags |= 1 <<
1391 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_CONF_REQ_SHIFT;
1392 conn_info.flags |=
1393 ((fcport->rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
1394 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_REC_VALID_SHIFT;
1395 }
1396
1397 rval = qed_ops->offload_conn(qedf->cdev, fcport->handle, &conn_info);
1398 if (rval) {
1399 QEDF_WARN(&(qedf->dbg_ctx), "Could not offload connection "
1400 "for portid=%06x.\n", fcport->rdata->ids.port_id);
1401 goto out_free_conn;
1402 } else
1403 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offload "
1404 "succeeded portid=%06x total_sqe=%d.\n",
1405 fcport->rdata->ids.port_id, total_sqe);
1406
1407 spin_lock_init(&fcport->rport_lock);
1408 atomic_set(&fcport->free_sqes, total_sqe);
1409 return 0;
1410 out_free_conn:
1411 qed_ops->release_conn(qedf->cdev, fcport->handle);
1412 out:
1413 return rval;
1414 }
1415
1416 #define QEDF_TERM_BUFF_SIZE 10
qedf_upload_connection(struct qedf_ctx * qedf,struct qedf_rport * fcport)1417 static void qedf_upload_connection(struct qedf_ctx *qedf,
1418 struct qedf_rport *fcport)
1419 {
1420 void *term_params;
1421 dma_addr_t term_params_dma;
1422
1423 /* Term params needs to be a DMA coherent buffer as qed shared the
1424 * physical DMA address with the firmware. The buffer may be used in
1425 * the receive path so we may eventually have to move this.
1426 */
1427 term_params = dma_alloc_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE,
1428 &term_params_dma, GFP_KERNEL);
1429 if (!term_params)
1430 return;
1431
1432 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Uploading connection "
1433 "port_id=%06x.\n", fcport->rdata->ids.port_id);
1434
1435 qed_ops->destroy_conn(qedf->cdev, fcport->handle, term_params_dma);
1436 qed_ops->release_conn(qedf->cdev, fcport->handle);
1437
1438 dma_free_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE, term_params,
1439 term_params_dma);
1440 }
1441
qedf_cleanup_fcport(struct qedf_ctx * qedf,struct qedf_rport * fcport)1442 static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
1443 struct qedf_rport *fcport)
1444 {
1445 struct fc_rport_priv *rdata = fcport->rdata;
1446
1447 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Cleaning up portid=%06x.\n",
1448 fcport->rdata->ids.port_id);
1449
1450 /* Flush any remaining i/o's before we upload the connection */
1451 qedf_flush_active_ios(fcport, -1);
1452
1453 if (test_and_clear_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))
1454 qedf_upload_connection(qedf, fcport);
1455 qedf_free_sq(qedf, fcport);
1456 fcport->rdata = NULL;
1457 fcport->qedf = NULL;
1458 kref_put(&rdata->kref, fc_rport_destroy);
1459 }
1460
1461 /*
1462 * This event_callback is called after successful completion of libfc
1463 * initiated target login. qedf can proceed with initiating the session
1464 * establishment.
1465 */
qedf_rport_event_handler(struct fc_lport * lport,struct fc_rport_priv * rdata,enum fc_rport_event event)1466 static void qedf_rport_event_handler(struct fc_lport *lport,
1467 struct fc_rport_priv *rdata,
1468 enum fc_rport_event event)
1469 {
1470 struct qedf_ctx *qedf = lport_priv(lport);
1471 struct fc_rport *rport = rdata->rport;
1472 struct fc_rport_libfc_priv *rp;
1473 struct qedf_rport *fcport;
1474 u32 port_id;
1475 int rval;
1476 unsigned long flags;
1477
1478 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "event = %d, "
1479 "port_id = 0x%x\n", event, rdata->ids.port_id);
1480
1481 switch (event) {
1482 case RPORT_EV_READY:
1483 if (!rport) {
1484 QEDF_WARN(&(qedf->dbg_ctx), "rport is NULL.\n");
1485 break;
1486 }
1487
1488 rp = rport->dd_data;
1489 fcport = (struct qedf_rport *)&rp[1];
1490 fcport->qedf = qedf;
1491
1492 if (atomic_read(&qedf->num_offloads) >= QEDF_MAX_SESSIONS) {
1493 QEDF_ERR(&(qedf->dbg_ctx), "Not offloading "
1494 "portid=0x%x as max number of offloaded sessions "
1495 "reached.\n", rdata->ids.port_id);
1496 return;
1497 }
1498
1499 /*
1500 * Don't try to offload the session again. Can happen when we
1501 * get an ADISC
1502 */
1503 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1504 QEDF_WARN(&(qedf->dbg_ctx), "Session already "
1505 "offloaded, portid=0x%x.\n",
1506 rdata->ids.port_id);
1507 return;
1508 }
1509
1510 if (rport->port_id == FC_FID_DIR_SERV) {
1511 /*
1512 * qedf_rport structure doesn't exist for
1513 * directory server.
1514 * We should not come here, as lport will
1515 * take care of fabric login
1516 */
1517 QEDF_WARN(&(qedf->dbg_ctx), "rport struct does not "
1518 "exist for dir server port_id=%x\n",
1519 rdata->ids.port_id);
1520 break;
1521 }
1522
1523 if (rdata->spp_type != FC_TYPE_FCP) {
1524 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1525 "Not offloading since spp type isn't FCP\n");
1526 break;
1527 }
1528 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
1529 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1530 "Not FCP target so not offloading\n");
1531 break;
1532 }
1533
1534 /* Initial reference held on entry, so this can't fail */
1535 kref_get(&rdata->kref);
1536 fcport->rdata = rdata;
1537 fcport->rport = rport;
1538
1539 rval = qedf_alloc_sq(qedf, fcport);
1540 if (rval) {
1541 qedf_cleanup_fcport(qedf, fcport);
1542 break;
1543 }
1544
1545 /* Set device type */
1546 if (rdata->flags & FC_RP_FLAGS_RETRY &&
1547 rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
1548 !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
1549 fcport->dev_type = QEDF_RPORT_TYPE_TAPE;
1550 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1551 "portid=%06x is a TAPE device.\n",
1552 rdata->ids.port_id);
1553 } else {
1554 fcport->dev_type = QEDF_RPORT_TYPE_DISK;
1555 }
1556
1557 rval = qedf_offload_connection(qedf, fcport);
1558 if (rval) {
1559 qedf_cleanup_fcport(qedf, fcport);
1560 break;
1561 }
1562
1563 /* Add fcport to list of qedf_ctx list of offloaded ports */
1564 spin_lock_irqsave(&qedf->hba_lock, flags);
1565 list_add_rcu(&fcport->peers, &qedf->fcports);
1566 spin_unlock_irqrestore(&qedf->hba_lock, flags);
1567
1568 /*
1569 * Set the session ready bit to let everyone know that this
1570 * connection is ready for I/O
1571 */
1572 set_bit(QEDF_RPORT_SESSION_READY, &fcport->flags);
1573 atomic_inc(&qedf->num_offloads);
1574
1575 break;
1576 case RPORT_EV_LOGO:
1577 case RPORT_EV_FAILED:
1578 case RPORT_EV_STOP:
1579 port_id = rdata->ids.port_id;
1580 if (port_id == FC_FID_DIR_SERV)
1581 break;
1582
1583 if (rdata->spp_type != FC_TYPE_FCP) {
1584 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1585 "No action since spp type isn't FCP\n");
1586 break;
1587 }
1588 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
1589 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1590 "Not FCP target so no action\n");
1591 break;
1592 }
1593
1594 if (!rport) {
1595 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1596 "port_id=%x - rport notcreated Yet!!\n", port_id);
1597 break;
1598 }
1599 rp = rport->dd_data;
1600 /*
1601 * Perform session upload. Note that rdata->peers is already
1602 * removed from disc->rports list before we get this event.
1603 */
1604 fcport = (struct qedf_rport *)&rp[1];
1605
1606 spin_lock_irqsave(&fcport->rport_lock, flags);
1607 /* Only free this fcport if it is offloaded already */
1608 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) &&
1609 !test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1610 &fcport->flags)) {
1611 set_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1612 &fcport->flags);
1613 spin_unlock_irqrestore(&fcport->rport_lock, flags);
1614 qedf_cleanup_fcport(qedf, fcport);
1615 /*
1616 * Remove fcport to list of qedf_ctx list of offloaded
1617 * ports
1618 */
1619 spin_lock_irqsave(&qedf->hba_lock, flags);
1620 list_del_rcu(&fcport->peers);
1621 spin_unlock_irqrestore(&qedf->hba_lock, flags);
1622
1623 clear_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1624 &fcport->flags);
1625 atomic_dec(&qedf->num_offloads);
1626 } else {
1627 spin_unlock_irqrestore(&fcport->rport_lock, flags);
1628 }
1629 break;
1630
1631 case RPORT_EV_NONE:
1632 break;
1633 }
1634 }
1635
qedf_abort_io(struct fc_lport * lport)1636 static void qedf_abort_io(struct fc_lport *lport)
1637 {
1638 /* NO-OP but need to fill in the template */
1639 }
1640
qedf_fcp_cleanup(struct fc_lport * lport)1641 static void qedf_fcp_cleanup(struct fc_lport *lport)
1642 {
1643 /*
1644 * NO-OP but need to fill in template to prevent a NULL
1645 * function pointer dereference during link down. I/Os
1646 * will be flushed when port is uploaded.
1647 */
1648 }
1649
1650 static struct libfc_function_template qedf_lport_template = {
1651 .frame_send = qedf_xmit,
1652 .fcp_abort_io = qedf_abort_io,
1653 .fcp_cleanup = qedf_fcp_cleanup,
1654 .rport_event_callback = qedf_rport_event_handler,
1655 .elsct_send = qedf_elsct_send,
1656 };
1657
qedf_fcoe_ctlr_setup(struct qedf_ctx * qedf)1658 static void qedf_fcoe_ctlr_setup(struct qedf_ctx *qedf)
1659 {
1660 fcoe_ctlr_init(&qedf->ctlr, FIP_MODE_AUTO);
1661
1662 qedf->ctlr.send = qedf_fip_send;
1663 qedf->ctlr.get_src_addr = qedf_get_src_mac;
1664 ether_addr_copy(qedf->ctlr.ctl_src_addr, qedf->mac);
1665 }
1666
qedf_setup_fdmi(struct qedf_ctx * qedf)1667 static void qedf_setup_fdmi(struct qedf_ctx *qedf)
1668 {
1669 struct fc_lport *lport = qedf->lport;
1670 u8 buf[8];
1671 int pos;
1672 uint32_t i;
1673
1674 /*
1675 * fdmi_enabled needs to be set for libfc
1676 * to execute FDMI registration
1677 */
1678 lport->fdmi_enabled = 1;
1679
1680 /*
1681 * Setup the necessary fc_host attributes to that will be used to fill
1682 * in the FDMI information.
1683 */
1684
1685 /* Get the PCI-e Device Serial Number Capability */
1686 pos = pci_find_ext_capability(qedf->pdev, PCI_EXT_CAP_ID_DSN);
1687 if (pos) {
1688 pos += 4;
1689 for (i = 0; i < 8; i++)
1690 pci_read_config_byte(qedf->pdev, pos + i, &buf[i]);
1691
1692 snprintf(fc_host_serial_number(lport->host),
1693 FC_SERIAL_NUMBER_SIZE,
1694 "%02X%02X%02X%02X%02X%02X%02X%02X",
1695 buf[7], buf[6], buf[5], buf[4],
1696 buf[3], buf[2], buf[1], buf[0]);
1697 } else
1698 snprintf(fc_host_serial_number(lport->host),
1699 FC_SERIAL_NUMBER_SIZE, "Unknown");
1700
1701 snprintf(fc_host_manufacturer(lport->host),
1702 FC_SERIAL_NUMBER_SIZE, "%s", "Marvell Semiconductor Inc.");
1703
1704 if (qedf->pdev->device == QL45xxx) {
1705 snprintf(fc_host_model(lport->host),
1706 FC_SYMBOLIC_NAME_SIZE, "%s", "QL45xxx");
1707
1708 snprintf(fc_host_model_description(lport->host),
1709 FC_SYMBOLIC_NAME_SIZE, "%s",
1710 "Marvell FastLinQ QL45xxx FCoE Adapter");
1711 }
1712
1713 if (qedf->pdev->device == QL41xxx) {
1714 snprintf(fc_host_model(lport->host),
1715 FC_SYMBOLIC_NAME_SIZE, "%s", "QL41xxx");
1716
1717 snprintf(fc_host_model_description(lport->host),
1718 FC_SYMBOLIC_NAME_SIZE, "%s",
1719 "Marvell FastLinQ QL41xxx FCoE Adapter");
1720 }
1721
1722 snprintf(fc_host_hardware_version(lport->host),
1723 FC_VERSION_STRING_SIZE, "Rev %d", qedf->pdev->revision);
1724
1725 snprintf(fc_host_driver_version(lport->host),
1726 FC_VERSION_STRING_SIZE, "%s", QEDF_VERSION);
1727
1728 snprintf(fc_host_firmware_version(lport->host),
1729 FC_VERSION_STRING_SIZE, "%d.%d.%d.%d",
1730 FW_MAJOR_VERSION, FW_MINOR_VERSION, FW_REVISION_VERSION,
1731 FW_ENGINEERING_VERSION);
1732
1733 snprintf(fc_host_vendor_identifier(lport->host),
1734 FC_VENDOR_IDENTIFIER, "%s", "Marvell");
1735
1736 }
1737
qedf_lport_setup(struct qedf_ctx * qedf)1738 static int qedf_lport_setup(struct qedf_ctx *qedf)
1739 {
1740 struct fc_lport *lport = qedf->lport;
1741
1742 lport->link_up = 0;
1743 lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1744 lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1745 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1746 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1747 lport->boot_time = jiffies;
1748 lport->e_d_tov = 2 * 1000;
1749 lport->r_a_tov = 10 * 1000;
1750
1751 /* Set NPIV support */
1752 lport->does_npiv = 1;
1753 fc_host_max_npiv_vports(lport->host) = QEDF_MAX_NPIV;
1754
1755 fc_set_wwnn(lport, qedf->wwnn);
1756 fc_set_wwpn(lport, qedf->wwpn);
1757
1758 if (fcoe_libfc_config(lport, &qedf->ctlr, &qedf_lport_template, 0)) {
1759 QEDF_ERR(&qedf->dbg_ctx,
1760 "fcoe_libfc_config failed.\n");
1761 return -ENOMEM;
1762 }
1763
1764 /* Allocate the exchange manager */
1765 fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_PARAMS_NUM_TASKS,
1766 0xfffe, NULL);
1767
1768 if (fc_lport_init_stats(lport))
1769 return -ENOMEM;
1770
1771 /* Finish lport config */
1772 fc_lport_config(lport);
1773
1774 /* Set max frame size */
1775 fc_set_mfs(lport, QEDF_MFS);
1776 fc_host_maxframe_size(lport->host) = lport->mfs;
1777
1778 /* Set default dev_loss_tmo based on module parameter */
1779 fc_host_dev_loss_tmo(lport->host) = qedf_dev_loss_tmo;
1780
1781 /* Set symbolic node name */
1782 if (qedf->pdev->device == QL45xxx)
1783 snprintf(fc_host_symbolic_name(lport->host), 256,
1784 "Marvell FastLinQ 45xxx FCoE v%s", QEDF_VERSION);
1785
1786 if (qedf->pdev->device == QL41xxx)
1787 snprintf(fc_host_symbolic_name(lport->host), 256,
1788 "Marvell FastLinQ 41xxx FCoE v%s", QEDF_VERSION);
1789
1790 qedf_setup_fdmi(qedf);
1791
1792 return 0;
1793 }
1794
1795 /*
1796 * NPIV functions
1797 */
1798
qedf_vport_libfc_config(struct fc_vport * vport,struct fc_lport * lport)1799 static int qedf_vport_libfc_config(struct fc_vport *vport,
1800 struct fc_lport *lport)
1801 {
1802 lport->link_up = 0;
1803 lport->qfull = 0;
1804 lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1805 lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1806 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1807 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1808 lport->boot_time = jiffies;
1809 lport->e_d_tov = 2 * 1000;
1810 lport->r_a_tov = 10 * 1000;
1811 lport->does_npiv = 1; /* Temporary until we add NPIV support */
1812
1813 /* Allocate stats for vport */
1814 if (fc_lport_init_stats(lport))
1815 return -ENOMEM;
1816
1817 /* Finish lport config */
1818 fc_lport_config(lport);
1819
1820 /* offload related configuration */
1821 lport->crc_offload = 0;
1822 lport->seq_offload = 0;
1823 lport->lro_enabled = 0;
1824 lport->lro_xid = 0;
1825 lport->lso_max = 0;
1826
1827 return 0;
1828 }
1829
qedf_vport_create(struct fc_vport * vport,bool disabled)1830 static int qedf_vport_create(struct fc_vport *vport, bool disabled)
1831 {
1832 struct Scsi_Host *shost = vport_to_shost(vport);
1833 struct fc_lport *n_port = shost_priv(shost);
1834 struct fc_lport *vn_port;
1835 struct qedf_ctx *base_qedf = lport_priv(n_port);
1836 struct qedf_ctx *vport_qedf;
1837
1838 char buf[32];
1839 int rc = 0;
1840
1841 rc = fcoe_validate_vport_create(vport);
1842 if (rc) {
1843 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1844 QEDF_WARN(&(base_qedf->dbg_ctx), "Failed to create vport, "
1845 "WWPN (0x%s) already exists.\n", buf);
1846 return rc;
1847 }
1848
1849 if (atomic_read(&base_qedf->link_state) != QEDF_LINK_UP) {
1850 QEDF_WARN(&(base_qedf->dbg_ctx), "Cannot create vport "
1851 "because link is not up.\n");
1852 return -EIO;
1853 }
1854
1855 vn_port = libfc_vport_create(vport, sizeof(struct qedf_ctx));
1856 if (!vn_port) {
1857 QEDF_WARN(&(base_qedf->dbg_ctx), "Could not create lport "
1858 "for vport.\n");
1859 return -ENOMEM;
1860 }
1861
1862 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1863 QEDF_ERR(&(base_qedf->dbg_ctx), "Creating NPIV port, WWPN=%s.\n",
1864 buf);
1865
1866 /* Copy some fields from base_qedf */
1867 vport_qedf = lport_priv(vn_port);
1868 memcpy(vport_qedf, base_qedf, sizeof(struct qedf_ctx));
1869
1870 /* Set qedf data specific to this vport */
1871 vport_qedf->lport = vn_port;
1872 /* Use same hba_lock as base_qedf */
1873 vport_qedf->hba_lock = base_qedf->hba_lock;
1874 vport_qedf->pdev = base_qedf->pdev;
1875 vport_qedf->cmd_mgr = base_qedf->cmd_mgr;
1876 init_completion(&vport_qedf->flogi_compl);
1877 INIT_LIST_HEAD(&vport_qedf->fcports);
1878 INIT_DELAYED_WORK(&vport_qedf->stag_work, qedf_stag_change_work);
1879
1880 rc = qedf_vport_libfc_config(vport, vn_port);
1881 if (rc) {
1882 QEDF_ERR(&(base_qedf->dbg_ctx), "Could not allocate memory "
1883 "for lport stats.\n");
1884 goto err;
1885 }
1886
1887 fc_set_wwnn(vn_port, vport->node_name);
1888 fc_set_wwpn(vn_port, vport->port_name);
1889 vport_qedf->wwnn = vn_port->wwnn;
1890 vport_qedf->wwpn = vn_port->wwpn;
1891
1892 vn_port->host->transportt = qedf_fc_vport_transport_template;
1893 vn_port->host->can_queue = FCOE_PARAMS_NUM_TASKS;
1894 vn_port->host->max_lun = qedf_max_lun;
1895 vn_port->host->sg_tablesize = QEDF_MAX_BDS_PER_CMD;
1896 vn_port->host->max_cmd_len = QEDF_MAX_CDB_LEN;
1897 vn_port->host->max_id = QEDF_MAX_SESSIONS;
1898
1899 rc = scsi_add_host(vn_port->host, &vport->dev);
1900 if (rc) {
1901 QEDF_WARN(&base_qedf->dbg_ctx,
1902 "Error adding Scsi_Host rc=0x%x.\n", rc);
1903 goto err;
1904 }
1905
1906 /* Set default dev_loss_tmo based on module parameter */
1907 fc_host_dev_loss_tmo(vn_port->host) = qedf_dev_loss_tmo;
1908
1909 /* Init libfc stuffs */
1910 memcpy(&vn_port->tt, &qedf_lport_template,
1911 sizeof(qedf_lport_template));
1912 fc_exch_init(vn_port);
1913 fc_elsct_init(vn_port);
1914 fc_lport_init(vn_port);
1915 fc_disc_init(vn_port);
1916 fc_disc_config(vn_port, vn_port);
1917
1918
1919 /* Allocate the exchange manager */
1920 shost = vport_to_shost(vport);
1921 n_port = shost_priv(shost);
1922 fc_exch_mgr_list_clone(n_port, vn_port);
1923
1924 /* Set max frame size */
1925 fc_set_mfs(vn_port, QEDF_MFS);
1926
1927 fc_host_port_type(vn_port->host) = FC_PORTTYPE_UNKNOWN;
1928
1929 if (disabled) {
1930 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1931 } else {
1932 vn_port->boot_time = jiffies;
1933 fc_fabric_login(vn_port);
1934 fc_vport_setlink(vn_port);
1935 }
1936
1937 /* Set symbolic node name */
1938 if (base_qedf->pdev->device == QL45xxx)
1939 snprintf(fc_host_symbolic_name(vn_port->host), 256,
1940 "Marvell FastLinQ 45xxx FCoE v%s", QEDF_VERSION);
1941
1942 if (base_qedf->pdev->device == QL41xxx)
1943 snprintf(fc_host_symbolic_name(vn_port->host), 256,
1944 "Marvell FastLinQ 41xxx FCoE v%s", QEDF_VERSION);
1945
1946 /* Set supported speed */
1947 fc_host_supported_speeds(vn_port->host) = n_port->link_supported_speeds;
1948
1949 /* Set speed */
1950 vn_port->link_speed = n_port->link_speed;
1951
1952 /* Set port type */
1953 fc_host_port_type(vn_port->host) = FC_PORTTYPE_NPIV;
1954
1955 /* Set maxframe size */
1956 fc_host_maxframe_size(vn_port->host) = n_port->mfs;
1957
1958 QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_NPIV, "vn_port=%p.\n",
1959 vn_port);
1960
1961 /* Set up debug context for vport */
1962 vport_qedf->dbg_ctx.host_no = vn_port->host->host_no;
1963 vport_qedf->dbg_ctx.pdev = base_qedf->pdev;
1964
1965 return 0;
1966
1967 err:
1968 scsi_host_put(vn_port->host);
1969 return rc;
1970 }
1971
qedf_vport_destroy(struct fc_vport * vport)1972 static int qedf_vport_destroy(struct fc_vport *vport)
1973 {
1974 struct Scsi_Host *shost = vport_to_shost(vport);
1975 struct fc_lport *n_port = shost_priv(shost);
1976 struct fc_lport *vn_port = vport->dd_data;
1977 struct qedf_ctx *qedf = lport_priv(vn_port);
1978
1979 if (!qedf) {
1980 QEDF_ERR(NULL, "qedf is NULL.\n");
1981 goto out;
1982 }
1983
1984 /* Set unloading bit on vport qedf_ctx to prevent more I/O */
1985 set_bit(QEDF_UNLOADING, &qedf->flags);
1986
1987 mutex_lock(&n_port->lp_mutex);
1988 list_del(&vn_port->list);
1989 mutex_unlock(&n_port->lp_mutex);
1990
1991 fc_fabric_logoff(vn_port);
1992 fc_lport_destroy(vn_port);
1993
1994 /* Detach from scsi-ml */
1995 fc_remove_host(vn_port->host);
1996 scsi_remove_host(vn_port->host);
1997
1998 /*
1999 * Only try to release the exchange manager if the vn_port
2000 * configuration is complete.
2001 */
2002 if (vn_port->state == LPORT_ST_READY)
2003 fc_exch_mgr_free(vn_port);
2004
2005 /* Free memory used by statistical counters */
2006 fc_lport_free_stats(vn_port);
2007
2008 /* Release Scsi_Host */
2009 scsi_host_put(vn_port->host);
2010
2011 out:
2012 return 0;
2013 }
2014
qedf_vport_disable(struct fc_vport * vport,bool disable)2015 static int qedf_vport_disable(struct fc_vport *vport, bool disable)
2016 {
2017 struct fc_lport *lport = vport->dd_data;
2018
2019 if (disable) {
2020 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2021 fc_fabric_logoff(lport);
2022 } else {
2023 lport->boot_time = jiffies;
2024 fc_fabric_login(lport);
2025 fc_vport_setlink(lport);
2026 }
2027 return 0;
2028 }
2029
2030 /*
2031 * During removal we need to wait for all the vports associated with a port
2032 * to be destroyed so we avoid a race condition where libfc is still trying
2033 * to reap vports while the driver remove function has already reaped the
2034 * driver contexts associated with the physical port.
2035 */
qedf_wait_for_vport_destroy(struct qedf_ctx * qedf)2036 static void qedf_wait_for_vport_destroy(struct qedf_ctx *qedf)
2037 {
2038 struct fc_host_attrs *fc_host = shost_to_fc_host(qedf->lport->host);
2039
2040 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
2041 "Entered.\n");
2042 while (fc_host->npiv_vports_inuse > 0) {
2043 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
2044 "Waiting for all vports to be reaped.\n");
2045 msleep(1000);
2046 }
2047 }
2048
2049 /**
2050 * qedf_fcoe_reset - Resets the fcoe
2051 *
2052 * @shost: shost the reset is from
2053 *
2054 * Returns: always 0
2055 */
qedf_fcoe_reset(struct Scsi_Host * shost)2056 static int qedf_fcoe_reset(struct Scsi_Host *shost)
2057 {
2058 struct fc_lport *lport = shost_priv(shost);
2059
2060 qedf_ctx_soft_reset(lport);
2061 return 0;
2062 }
2063
qedf_get_host_port_id(struct Scsi_Host * shost)2064 static void qedf_get_host_port_id(struct Scsi_Host *shost)
2065 {
2066 struct fc_lport *lport = shost_priv(shost);
2067
2068 fc_host_port_id(shost) = lport->port_id;
2069 }
2070
qedf_fc_get_host_stats(struct Scsi_Host * shost)2071 static struct fc_host_statistics *qedf_fc_get_host_stats(struct Scsi_Host
2072 *shost)
2073 {
2074 struct fc_host_statistics *qedf_stats;
2075 struct fc_lport *lport = shost_priv(shost);
2076 struct qedf_ctx *qedf = lport_priv(lport);
2077 struct qed_fcoe_stats *fw_fcoe_stats;
2078
2079 qedf_stats = fc_get_host_stats(shost);
2080
2081 /* We don't collect offload stats for specific NPIV ports */
2082 if (lport->vport)
2083 goto out;
2084
2085 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
2086 if (!fw_fcoe_stats) {
2087 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
2088 "fw_fcoe_stats.\n");
2089 goto out;
2090 }
2091
2092 mutex_lock(&qedf->stats_mutex);
2093
2094 /* Query firmware for offload stats */
2095 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
2096
2097 /*
2098 * The expectation is that we add our offload stats to the stats
2099 * being maintained by libfc each time the fc_get_host_status callback
2100 * is invoked. The additions are not carried over for each call to
2101 * the fc_get_host_stats callback.
2102 */
2103 qedf_stats->tx_frames += fw_fcoe_stats->fcoe_tx_data_pkt_cnt +
2104 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt +
2105 fw_fcoe_stats->fcoe_tx_other_pkt_cnt;
2106 qedf_stats->rx_frames += fw_fcoe_stats->fcoe_rx_data_pkt_cnt +
2107 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt +
2108 fw_fcoe_stats->fcoe_rx_other_pkt_cnt;
2109 qedf_stats->fcp_input_megabytes +=
2110 do_div(fw_fcoe_stats->fcoe_rx_byte_cnt, 1000000);
2111 qedf_stats->fcp_output_megabytes +=
2112 do_div(fw_fcoe_stats->fcoe_tx_byte_cnt, 1000000);
2113 qedf_stats->rx_words += fw_fcoe_stats->fcoe_rx_byte_cnt / 4;
2114 qedf_stats->tx_words += fw_fcoe_stats->fcoe_tx_byte_cnt / 4;
2115 qedf_stats->invalid_crc_count +=
2116 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt;
2117 qedf_stats->dumped_frames =
2118 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
2119 qedf_stats->error_frames +=
2120 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
2121 qedf_stats->fcp_input_requests += qedf->input_requests;
2122 qedf_stats->fcp_output_requests += qedf->output_requests;
2123 qedf_stats->fcp_control_requests += qedf->control_requests;
2124 qedf_stats->fcp_packet_aborts += qedf->packet_aborts;
2125 qedf_stats->fcp_frame_alloc_failures += qedf->alloc_failures;
2126
2127 mutex_unlock(&qedf->stats_mutex);
2128 kfree(fw_fcoe_stats);
2129 out:
2130 return qedf_stats;
2131 }
2132
2133 static struct fc_function_template qedf_fc_transport_fn = {
2134 .show_host_node_name = 1,
2135 .show_host_port_name = 1,
2136 .show_host_supported_classes = 1,
2137 .show_host_supported_fc4s = 1,
2138 .show_host_active_fc4s = 1,
2139 .show_host_maxframe_size = 1,
2140
2141 .get_host_port_id = qedf_get_host_port_id,
2142 .show_host_port_id = 1,
2143 .show_host_supported_speeds = 1,
2144 .get_host_speed = fc_get_host_speed,
2145 .show_host_speed = 1,
2146 .show_host_port_type = 1,
2147 .get_host_port_state = fc_get_host_port_state,
2148 .show_host_port_state = 1,
2149 .show_host_symbolic_name = 1,
2150
2151 /*
2152 * Tell FC transport to allocate enough space to store the backpointer
2153 * for the associate qedf_rport struct.
2154 */
2155 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2156 sizeof(struct qedf_rport)),
2157 .show_rport_maxframe_size = 1,
2158 .show_rport_supported_classes = 1,
2159 .show_host_fabric_name = 1,
2160 .show_starget_node_name = 1,
2161 .show_starget_port_name = 1,
2162 .show_starget_port_id = 1,
2163 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2164 .show_rport_dev_loss_tmo = 1,
2165 .get_fc_host_stats = qedf_fc_get_host_stats,
2166 .issue_fc_host_lip = qedf_fcoe_reset,
2167 .vport_create = qedf_vport_create,
2168 .vport_delete = qedf_vport_destroy,
2169 .vport_disable = qedf_vport_disable,
2170 .bsg_request = fc_lport_bsg_request,
2171 };
2172
2173 static struct fc_function_template qedf_fc_vport_transport_fn = {
2174 .show_host_node_name = 1,
2175 .show_host_port_name = 1,
2176 .show_host_supported_classes = 1,
2177 .show_host_supported_fc4s = 1,
2178 .show_host_active_fc4s = 1,
2179 .show_host_maxframe_size = 1,
2180 .show_host_port_id = 1,
2181 .show_host_supported_speeds = 1,
2182 .get_host_speed = fc_get_host_speed,
2183 .show_host_speed = 1,
2184 .show_host_port_type = 1,
2185 .get_host_port_state = fc_get_host_port_state,
2186 .show_host_port_state = 1,
2187 .show_host_symbolic_name = 1,
2188 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2189 sizeof(struct qedf_rport)),
2190 .show_rport_maxframe_size = 1,
2191 .show_rport_supported_classes = 1,
2192 .show_host_fabric_name = 1,
2193 .show_starget_node_name = 1,
2194 .show_starget_port_name = 1,
2195 .show_starget_port_id = 1,
2196 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2197 .show_rport_dev_loss_tmo = 1,
2198 .get_fc_host_stats = fc_get_host_stats,
2199 .issue_fc_host_lip = qedf_fcoe_reset,
2200 .bsg_request = fc_lport_bsg_request,
2201 };
2202
qedf_fp_has_work(struct qedf_fastpath * fp)2203 static bool qedf_fp_has_work(struct qedf_fastpath *fp)
2204 {
2205 struct qedf_ctx *qedf = fp->qedf;
2206 struct global_queue *que;
2207 struct qed_sb_info *sb_info = fp->sb_info;
2208 struct status_block *sb = sb_info->sb_virt;
2209 u16 prod_idx;
2210
2211 /* Get the pointer to the global CQ this completion is on */
2212 que = qedf->global_queues[fp->sb_id];
2213
2214 /* Be sure all responses have been written to PI */
2215 rmb();
2216
2217 /* Get the current firmware producer index */
2218 prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
2219
2220 return (que->cq_prod_idx != prod_idx);
2221 }
2222
2223 /*
2224 * Interrupt handler code.
2225 */
2226
2227 /* Process completion queue and copy CQE contents for deferred processesing
2228 *
2229 * Return true if we should wake the I/O thread, false if not.
2230 */
qedf_process_completions(struct qedf_fastpath * fp)2231 static bool qedf_process_completions(struct qedf_fastpath *fp)
2232 {
2233 struct qedf_ctx *qedf = fp->qedf;
2234 struct qed_sb_info *sb_info = fp->sb_info;
2235 struct status_block *sb = sb_info->sb_virt;
2236 struct global_queue *que;
2237 u16 prod_idx;
2238 struct fcoe_cqe *cqe;
2239 struct qedf_io_work *io_work;
2240 unsigned int cpu;
2241 struct qedf_ioreq *io_req = NULL;
2242 u16 xid;
2243 u16 new_cqes;
2244 u32 comp_type;
2245
2246 /* Get the current firmware producer index */
2247 prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
2248
2249 /* Get the pointer to the global CQ this completion is on */
2250 que = qedf->global_queues[fp->sb_id];
2251
2252 /* Calculate the amount of new elements since last processing */
2253 new_cqes = (prod_idx >= que->cq_prod_idx) ?
2254 (prod_idx - que->cq_prod_idx) :
2255 0x10000 - que->cq_prod_idx + prod_idx;
2256
2257 /* Save producer index */
2258 que->cq_prod_idx = prod_idx;
2259
2260 while (new_cqes) {
2261 fp->completions++;
2262 cqe = &que->cq[que->cq_cons_idx];
2263
2264 comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
2265 FCOE_CQE_CQE_TYPE_MASK;
2266
2267 /*
2268 * Process unsolicited CQEs directly in the interrupt handler
2269 * sine we need the fastpath ID
2270 */
2271 if (comp_type == FCOE_UNSOLIC_CQE_TYPE) {
2272 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
2273 "Unsolicated CQE.\n");
2274 qedf_process_unsol_compl(qedf, fp->sb_id, cqe);
2275 /*
2276 * Don't add a work list item. Increment consumer
2277 * consumer index and move on.
2278 */
2279 goto inc_idx;
2280 }
2281
2282 xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
2283 io_req = &qedf->cmd_mgr->cmds[xid];
2284
2285 /*
2286 * Figure out which percpu thread we should queue this I/O
2287 * on.
2288 */
2289 if (!io_req)
2290 /* If there is not io_req associated with this CQE
2291 * just queue it on CPU 0
2292 */
2293 cpu = 0;
2294 else {
2295 cpu = io_req->cpu;
2296 io_req->int_cpu = smp_processor_id();
2297 }
2298
2299 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
2300 if (!io_work) {
2301 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
2302 "work for I/O completion.\n");
2303 continue;
2304 }
2305 memset(io_work, 0, sizeof(struct qedf_io_work));
2306
2307 INIT_WORK(&io_work->work, qedf_fp_io_handler);
2308
2309 /* Copy contents of CQE for deferred processing */
2310 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));
2311
2312 io_work->qedf = fp->qedf;
2313 io_work->fp = NULL; /* Only used for unsolicited frames */
2314
2315 queue_work_on(cpu, qedf_io_wq, &io_work->work);
2316
2317 inc_idx:
2318 que->cq_cons_idx++;
2319 if (que->cq_cons_idx == fp->cq_num_entries)
2320 que->cq_cons_idx = 0;
2321 new_cqes--;
2322 }
2323
2324 return true;
2325 }
2326
2327
2328 /* MSI-X fastpath handler code */
qedf_msix_handler(int irq,void * dev_id)2329 static irqreturn_t qedf_msix_handler(int irq, void *dev_id)
2330 {
2331 struct qedf_fastpath *fp = dev_id;
2332
2333 if (!fp) {
2334 QEDF_ERR(NULL, "fp is null.\n");
2335 return IRQ_HANDLED;
2336 }
2337 if (!fp->sb_info) {
2338 QEDF_ERR(NULL, "fp->sb_info in null.");
2339 return IRQ_HANDLED;
2340 }
2341
2342 /*
2343 * Disable interrupts for this status block while we process new
2344 * completions
2345 */
2346 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);
2347
2348 while (1) {
2349 qedf_process_completions(fp);
2350
2351 if (qedf_fp_has_work(fp) == 0) {
2352 /* Update the sb information */
2353 qed_sb_update_sb_idx(fp->sb_info);
2354
2355 /* Check for more work */
2356 rmb();
2357
2358 if (qedf_fp_has_work(fp) == 0) {
2359 /* Re-enable interrupts */
2360 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
2361 return IRQ_HANDLED;
2362 }
2363 }
2364 }
2365
2366 /* Do we ever want to break out of above loop? */
2367 return IRQ_HANDLED;
2368 }
2369
2370 /* simd handler for MSI/INTa */
qedf_simd_int_handler(void * cookie)2371 static void qedf_simd_int_handler(void *cookie)
2372 {
2373 /* Cookie is qedf_ctx struct */
2374 struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
2375
2376 QEDF_WARN(&(qedf->dbg_ctx), "qedf=%p.\n", qedf);
2377 }
2378
2379 #define QEDF_SIMD_HANDLER_NUM 0
qedf_sync_free_irqs(struct qedf_ctx * qedf)2380 static void qedf_sync_free_irqs(struct qedf_ctx *qedf)
2381 {
2382 int i;
2383 u16 vector_idx = 0;
2384 u32 vector;
2385
2386 if (qedf->int_info.msix_cnt) {
2387 for (i = 0; i < qedf->int_info.used_cnt; i++) {
2388 vector_idx = i * qedf->dev_info.common.num_hwfns +
2389 qed_ops->common->get_affin_hwfn_idx(qedf->cdev);
2390 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
2391 "Freeing IRQ #%d vector_idx=%d.\n",
2392 i, vector_idx);
2393 vector = qedf->int_info.msix[vector_idx].vector;
2394 synchronize_irq(vector);
2395 irq_set_affinity_hint(vector, NULL);
2396 irq_set_affinity_notifier(vector, NULL);
2397 free_irq(vector, &qedf->fp_array[i]);
2398 }
2399 } else
2400 qed_ops->common->simd_handler_clean(qedf->cdev,
2401 QEDF_SIMD_HANDLER_NUM);
2402
2403 qedf->int_info.used_cnt = 0;
2404 qed_ops->common->set_fp_int(qedf->cdev, 0);
2405 }
2406
qedf_request_msix_irq(struct qedf_ctx * qedf)2407 static int qedf_request_msix_irq(struct qedf_ctx *qedf)
2408 {
2409 int i, rc, cpu;
2410 u16 vector_idx = 0;
2411 u32 vector;
2412
2413 cpu = cpumask_first(cpu_online_mask);
2414 for (i = 0; i < qedf->num_queues; i++) {
2415 vector_idx = i * qedf->dev_info.common.num_hwfns +
2416 qed_ops->common->get_affin_hwfn_idx(qedf->cdev);
2417 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
2418 "Requesting IRQ #%d vector_idx=%d.\n",
2419 i, vector_idx);
2420 vector = qedf->int_info.msix[vector_idx].vector;
2421 rc = request_irq(vector, qedf_msix_handler, 0, "qedf",
2422 &qedf->fp_array[i]);
2423
2424 if (rc) {
2425 QEDF_WARN(&(qedf->dbg_ctx), "request_irq failed.\n");
2426 qedf_sync_free_irqs(qedf);
2427 return rc;
2428 }
2429
2430 qedf->int_info.used_cnt++;
2431 rc = irq_set_affinity_hint(vector, get_cpu_mask(cpu));
2432 cpu = cpumask_next(cpu, cpu_online_mask);
2433 }
2434
2435 return 0;
2436 }
2437
qedf_setup_int(struct qedf_ctx * qedf)2438 static int qedf_setup_int(struct qedf_ctx *qedf)
2439 {
2440 int rc = 0;
2441
2442 /*
2443 * Learn interrupt configuration
2444 */
2445 rc = qed_ops->common->set_fp_int(qedf->cdev, num_online_cpus());
2446 if (rc <= 0)
2447 return 0;
2448
2449 rc = qed_ops->common->get_fp_int(qedf->cdev, &qedf->int_info);
2450 if (rc)
2451 return 0;
2452
2453 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of msix_cnt = "
2454 "0x%x num of cpus = 0x%x\n", qedf->int_info.msix_cnt,
2455 num_online_cpus());
2456
2457 if (qedf->int_info.msix_cnt)
2458 return qedf_request_msix_irq(qedf);
2459
2460 qed_ops->common->simd_handler_config(qedf->cdev, &qedf,
2461 QEDF_SIMD_HANDLER_NUM, qedf_simd_int_handler);
2462 qedf->int_info.used_cnt = 1;
2463
2464 QEDF_ERR(&qedf->dbg_ctx,
2465 "Cannot load driver due to a lack of MSI-X vectors.\n");
2466 return -EINVAL;
2467 }
2468
2469 /* Main function for libfc frame reception */
qedf_recv_frame(struct qedf_ctx * qedf,struct sk_buff * skb)2470 static void qedf_recv_frame(struct qedf_ctx *qedf,
2471 struct sk_buff *skb)
2472 {
2473 u32 fr_len;
2474 struct fc_lport *lport;
2475 struct fc_frame_header *fh;
2476 struct fcoe_crc_eof crc_eof;
2477 struct fc_frame *fp;
2478 u8 *mac = NULL;
2479 u8 *dest_mac = NULL;
2480 struct fcoe_hdr *hp;
2481 struct qedf_rport *fcport;
2482 struct fc_lport *vn_port;
2483 u32 f_ctl;
2484
2485 lport = qedf->lport;
2486 if (lport == NULL || lport->state == LPORT_ST_DISABLED) {
2487 QEDF_WARN(NULL, "Invalid lport struct or lport disabled.\n");
2488 kfree_skb(skb);
2489 return;
2490 }
2491
2492 if (skb_is_nonlinear(skb))
2493 skb_linearize(skb);
2494 mac = eth_hdr(skb)->h_source;
2495 dest_mac = eth_hdr(skb)->h_dest;
2496
2497 /* Pull the header */
2498 hp = (struct fcoe_hdr *)skb->data;
2499 fh = (struct fc_frame_header *) skb_transport_header(skb);
2500 skb_pull(skb, sizeof(struct fcoe_hdr));
2501 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
2502
2503 fp = (struct fc_frame *)skb;
2504 fc_frame_init(fp);
2505 fr_dev(fp) = lport;
2506 fr_sof(fp) = hp->fcoe_sof;
2507 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
2508 QEDF_INFO(NULL, QEDF_LOG_LL2, "skb_copy_bits failed.\n");
2509 kfree_skb(skb);
2510 return;
2511 }
2512 fr_eof(fp) = crc_eof.fcoe_eof;
2513 fr_crc(fp) = crc_eof.fcoe_crc32;
2514 if (pskb_trim(skb, fr_len)) {
2515 QEDF_INFO(NULL, QEDF_LOG_LL2, "pskb_trim failed.\n");
2516 kfree_skb(skb);
2517 return;
2518 }
2519
2520 fh = fc_frame_header_get(fp);
2521
2522 /*
2523 * Invalid frame filters.
2524 */
2525
2526 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
2527 fh->fh_type == FC_TYPE_FCP) {
2528 /* Drop FCP data. We dont this in L2 path */
2529 kfree_skb(skb);
2530 return;
2531 }
2532 if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
2533 fh->fh_type == FC_TYPE_ELS) {
2534 switch (fc_frame_payload_op(fp)) {
2535 case ELS_LOGO:
2536 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
2537 /* drop non-FIP LOGO */
2538 kfree_skb(skb);
2539 return;
2540 }
2541 break;
2542 }
2543 }
2544
2545 if (fh->fh_r_ctl == FC_RCTL_BA_ABTS) {
2546 /* Drop incoming ABTS */
2547 kfree_skb(skb);
2548 return;
2549 }
2550
2551 if (ntoh24(&dest_mac[3]) != ntoh24(fh->fh_d_id)) {
2552 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2553 "FC frame d_id mismatch with MAC %pM.\n", dest_mac);
2554 kfree_skb(skb);
2555 return;
2556 }
2557
2558 if (qedf->ctlr.state) {
2559 if (!ether_addr_equal(mac, qedf->ctlr.dest_addr)) {
2560 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2561 "Wrong source address: mac:%pM dest_addr:%pM.\n",
2562 mac, qedf->ctlr.dest_addr);
2563 kfree_skb(skb);
2564 return;
2565 }
2566 }
2567
2568 vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
2569
2570 /*
2571 * If the destination ID from the frame header does not match what we
2572 * have on record for lport and the search for a NPIV port came up
2573 * empty then this is not addressed to our port so simply drop it.
2574 */
2575 if (lport->port_id != ntoh24(fh->fh_d_id) && !vn_port) {
2576 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
2577 "Dropping frame due to destination mismatch: lport->port_id=0x%x fh->d_id=0x%x.\n",
2578 lport->port_id, ntoh24(fh->fh_d_id));
2579 kfree_skb(skb);
2580 return;
2581 }
2582
2583 f_ctl = ntoh24(fh->fh_f_ctl);
2584 if ((fh->fh_type == FC_TYPE_BLS) && (f_ctl & FC_FC_SEQ_CTX) &&
2585 (f_ctl & FC_FC_EX_CTX)) {
2586 /* Drop incoming ABTS response that has both SEQ/EX CTX set */
2587 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
2588 "Dropping ABTS response as both SEQ/EX CTX set.\n");
2589 kfree_skb(skb);
2590 return;
2591 }
2592
2593 /*
2594 * If a connection is uploading, drop incoming FCoE frames as there
2595 * is a small window where we could try to return a frame while libfc
2596 * is trying to clean things up.
2597 */
2598
2599 /* Get fcport associated with d_id if it exists */
2600 fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
2601
2602 if (fcport && test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
2603 &fcport->flags)) {
2604 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2605 "Connection uploading, dropping fp=%p.\n", fp);
2606 kfree_skb(skb);
2607 return;
2608 }
2609
2610 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame receive: "
2611 "skb=%p fp=%p src=%06x dest=%06x r_ctl=%x fh_type=%x.\n", skb, fp,
2612 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl,
2613 fh->fh_type);
2614 if (qedf_dump_frames)
2615 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
2616 1, skb->data, skb->len, false);
2617 fc_exch_recv(lport, fp);
2618 }
2619
qedf_ll2_process_skb(struct work_struct * work)2620 static void qedf_ll2_process_skb(struct work_struct *work)
2621 {
2622 struct qedf_skb_work *skb_work =
2623 container_of(work, struct qedf_skb_work, work);
2624 struct qedf_ctx *qedf = skb_work->qedf;
2625 struct sk_buff *skb = skb_work->skb;
2626 struct ethhdr *eh;
2627
2628 if (!qedf) {
2629 QEDF_ERR(NULL, "qedf is NULL\n");
2630 goto err_out;
2631 }
2632
2633 eh = (struct ethhdr *)skb->data;
2634
2635 /* Undo VLAN encapsulation */
2636 if (eh->h_proto == htons(ETH_P_8021Q)) {
2637 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
2638 eh = skb_pull(skb, VLAN_HLEN);
2639 skb_reset_mac_header(skb);
2640 }
2641
2642 /*
2643 * Process either a FIP frame or FCoE frame based on the
2644 * protocol value. If it's not either just drop the
2645 * frame.
2646 */
2647 if (eh->h_proto == htons(ETH_P_FIP)) {
2648 qedf_fip_recv(qedf, skb);
2649 goto out;
2650 } else if (eh->h_proto == htons(ETH_P_FCOE)) {
2651 __skb_pull(skb, ETH_HLEN);
2652 qedf_recv_frame(qedf, skb);
2653 goto out;
2654 } else
2655 goto err_out;
2656
2657 err_out:
2658 kfree_skb(skb);
2659 out:
2660 kfree(skb_work);
2661 return;
2662 }
2663
qedf_ll2_rx(void * cookie,struct sk_buff * skb,u32 arg1,u32 arg2)2664 static int qedf_ll2_rx(void *cookie, struct sk_buff *skb,
2665 u32 arg1, u32 arg2)
2666 {
2667 struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
2668 struct qedf_skb_work *skb_work;
2669
2670 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
2671 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
2672 "Dropping frame as link state is down.\n");
2673 kfree_skb(skb);
2674 return 0;
2675 }
2676
2677 skb_work = kzalloc(sizeof(struct qedf_skb_work), GFP_ATOMIC);
2678 if (!skb_work) {
2679 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate skb_work so "
2680 "dropping frame.\n");
2681 kfree_skb(skb);
2682 return 0;
2683 }
2684
2685 INIT_WORK(&skb_work->work, qedf_ll2_process_skb);
2686 skb_work->skb = skb;
2687 skb_work->qedf = qedf;
2688 queue_work(qedf->ll2_recv_wq, &skb_work->work);
2689
2690 return 0;
2691 }
2692
2693 static struct qed_ll2_cb_ops qedf_ll2_cb_ops = {
2694 .rx_cb = qedf_ll2_rx,
2695 .tx_cb = NULL,
2696 };
2697
2698 /* Main thread to process I/O completions */
qedf_fp_io_handler(struct work_struct * work)2699 void qedf_fp_io_handler(struct work_struct *work)
2700 {
2701 struct qedf_io_work *io_work =
2702 container_of(work, struct qedf_io_work, work);
2703 u32 comp_type;
2704
2705 /*
2706 * Deferred part of unsolicited CQE sends
2707 * frame to libfc.
2708 */
2709 comp_type = (io_work->cqe.cqe_data >>
2710 FCOE_CQE_CQE_TYPE_SHIFT) &
2711 FCOE_CQE_CQE_TYPE_MASK;
2712 if (comp_type == FCOE_UNSOLIC_CQE_TYPE &&
2713 io_work->fp)
2714 fc_exch_recv(io_work->qedf->lport, io_work->fp);
2715 else
2716 qedf_process_cqe(io_work->qedf, &io_work->cqe);
2717
2718 kfree(io_work);
2719 }
2720
qedf_alloc_and_init_sb(struct qedf_ctx * qedf,struct qed_sb_info * sb_info,u16 sb_id)2721 static int qedf_alloc_and_init_sb(struct qedf_ctx *qedf,
2722 struct qed_sb_info *sb_info, u16 sb_id)
2723 {
2724 struct status_block *sb_virt;
2725 dma_addr_t sb_phys;
2726 int ret;
2727
2728 sb_virt = dma_alloc_coherent(&qedf->pdev->dev,
2729 sizeof(struct status_block), &sb_phys, GFP_KERNEL);
2730
2731 if (!sb_virt) {
2732 QEDF_ERR(&qedf->dbg_ctx,
2733 "Status block allocation failed for id = %d.\n",
2734 sb_id);
2735 return -ENOMEM;
2736 }
2737
2738 ret = qed_ops->common->sb_init(qedf->cdev, sb_info, sb_virt, sb_phys,
2739 sb_id, QED_SB_TYPE_STORAGE);
2740
2741 if (ret) {
2742 dma_free_coherent(&qedf->pdev->dev, sizeof(*sb_virt), sb_virt, sb_phys);
2743 QEDF_ERR(&qedf->dbg_ctx,
2744 "Status block initialization failed (0x%x) for id = %d.\n",
2745 ret, sb_id);
2746 return ret;
2747 }
2748
2749 return 0;
2750 }
2751
qedf_free_sb(struct qedf_ctx * qedf,struct qed_sb_info * sb_info)2752 static void qedf_free_sb(struct qedf_ctx *qedf, struct qed_sb_info *sb_info)
2753 {
2754 if (sb_info->sb_virt)
2755 dma_free_coherent(&qedf->pdev->dev, sizeof(*sb_info->sb_virt),
2756 (void *)sb_info->sb_virt, sb_info->sb_phys);
2757 }
2758
qedf_destroy_sb(struct qedf_ctx * qedf)2759 static void qedf_destroy_sb(struct qedf_ctx *qedf)
2760 {
2761 int id;
2762 struct qedf_fastpath *fp = NULL;
2763
2764 for (id = 0; id < qedf->num_queues; id++) {
2765 fp = &(qedf->fp_array[id]);
2766 if (fp->sb_id == QEDF_SB_ID_NULL)
2767 break;
2768 qedf_free_sb(qedf, fp->sb_info);
2769 kfree(fp->sb_info);
2770 }
2771 kfree(qedf->fp_array);
2772 }
2773
qedf_prepare_sb(struct qedf_ctx * qedf)2774 static int qedf_prepare_sb(struct qedf_ctx *qedf)
2775 {
2776 int id;
2777 struct qedf_fastpath *fp;
2778 int ret;
2779
2780 qedf->fp_array =
2781 kcalloc(qedf->num_queues, sizeof(struct qedf_fastpath),
2782 GFP_KERNEL);
2783
2784 if (!qedf->fp_array) {
2785 QEDF_ERR(&(qedf->dbg_ctx), "fastpath array allocation "
2786 "failed.\n");
2787 return -ENOMEM;
2788 }
2789
2790 for (id = 0; id < qedf->num_queues; id++) {
2791 fp = &(qedf->fp_array[id]);
2792 fp->sb_id = QEDF_SB_ID_NULL;
2793 fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
2794 if (!fp->sb_info) {
2795 QEDF_ERR(&(qedf->dbg_ctx), "SB info struct "
2796 "allocation failed.\n");
2797 goto err;
2798 }
2799 ret = qedf_alloc_and_init_sb(qedf, fp->sb_info, id);
2800 if (ret) {
2801 QEDF_ERR(&(qedf->dbg_ctx), "SB allocation and "
2802 "initialization failed.\n");
2803 goto err;
2804 }
2805 fp->sb_id = id;
2806 fp->qedf = qedf;
2807 fp->cq_num_entries =
2808 qedf->global_queues[id]->cq_mem_size /
2809 sizeof(struct fcoe_cqe);
2810 }
2811 err:
2812 return 0;
2813 }
2814
qedf_process_cqe(struct qedf_ctx * qedf,struct fcoe_cqe * cqe)2815 void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
2816 {
2817 u16 xid;
2818 struct qedf_ioreq *io_req;
2819 struct qedf_rport *fcport;
2820 u32 comp_type;
2821 u8 io_comp_type;
2822 unsigned long flags;
2823
2824 comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
2825 FCOE_CQE_CQE_TYPE_MASK;
2826
2827 xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
2828 io_req = &qedf->cmd_mgr->cmds[xid];
2829
2830 /* Completion not for a valid I/O anymore so just return */
2831 if (!io_req) {
2832 QEDF_ERR(&qedf->dbg_ctx,
2833 "io_req is NULL for xid=0x%x.\n", xid);
2834 return;
2835 }
2836
2837 fcport = io_req->fcport;
2838
2839 if (fcport == NULL) {
2840 QEDF_ERR(&qedf->dbg_ctx,
2841 "fcport is NULL for xid=0x%x io_req=%p.\n",
2842 xid, io_req);
2843 return;
2844 }
2845
2846 /*
2847 * Check that fcport is offloaded. If it isn't then the spinlock
2848 * isn't valid and shouldn't be taken. We should just return.
2849 */
2850 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
2851 QEDF_ERR(&qedf->dbg_ctx,
2852 "Session not offloaded yet, fcport = %p.\n", fcport);
2853 return;
2854 }
2855
2856 spin_lock_irqsave(&fcport->rport_lock, flags);
2857 io_comp_type = io_req->cmd_type;
2858 spin_unlock_irqrestore(&fcport->rport_lock, flags);
2859
2860 switch (comp_type) {
2861 case FCOE_GOOD_COMPLETION_CQE_TYPE:
2862 atomic_inc(&fcport->free_sqes);
2863 switch (io_comp_type) {
2864 case QEDF_SCSI_CMD:
2865 qedf_scsi_completion(qedf, cqe, io_req);
2866 break;
2867 case QEDF_ELS:
2868 qedf_process_els_compl(qedf, cqe, io_req);
2869 break;
2870 case QEDF_TASK_MGMT_CMD:
2871 qedf_process_tmf_compl(qedf, cqe, io_req);
2872 break;
2873 case QEDF_SEQ_CLEANUP:
2874 qedf_process_seq_cleanup_compl(qedf, cqe, io_req);
2875 break;
2876 }
2877 break;
2878 case FCOE_ERROR_DETECTION_CQE_TYPE:
2879 atomic_inc(&fcport->free_sqes);
2880 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2881 "Error detect CQE.\n");
2882 qedf_process_error_detect(qedf, cqe, io_req);
2883 break;
2884 case FCOE_EXCH_CLEANUP_CQE_TYPE:
2885 atomic_inc(&fcport->free_sqes);
2886 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2887 "Cleanup CQE.\n");
2888 qedf_process_cleanup_compl(qedf, cqe, io_req);
2889 break;
2890 case FCOE_ABTS_CQE_TYPE:
2891 atomic_inc(&fcport->free_sqes);
2892 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2893 "Abort CQE.\n");
2894 qedf_process_abts_compl(qedf, cqe, io_req);
2895 break;
2896 case FCOE_DUMMY_CQE_TYPE:
2897 atomic_inc(&fcport->free_sqes);
2898 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2899 "Dummy CQE.\n");
2900 break;
2901 case FCOE_LOCAL_COMP_CQE_TYPE:
2902 atomic_inc(&fcport->free_sqes);
2903 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2904 "Local completion CQE.\n");
2905 break;
2906 case FCOE_WARNING_CQE_TYPE:
2907 atomic_inc(&fcport->free_sqes);
2908 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2909 "Warning CQE.\n");
2910 qedf_process_warning_compl(qedf, cqe, io_req);
2911 break;
2912 case MAX_FCOE_CQE_TYPE:
2913 atomic_inc(&fcport->free_sqes);
2914 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2915 "Max FCoE CQE.\n");
2916 break;
2917 default:
2918 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2919 "Default CQE.\n");
2920 break;
2921 }
2922 }
2923
qedf_free_bdq(struct qedf_ctx * qedf)2924 static void qedf_free_bdq(struct qedf_ctx *qedf)
2925 {
2926 int i;
2927
2928 if (qedf->bdq_pbl_list)
2929 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
2930 qedf->bdq_pbl_list, qedf->bdq_pbl_list_dma);
2931
2932 if (qedf->bdq_pbl)
2933 dma_free_coherent(&qedf->pdev->dev, qedf->bdq_pbl_mem_size,
2934 qedf->bdq_pbl, qedf->bdq_pbl_dma);
2935
2936 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2937 if (qedf->bdq[i].buf_addr) {
2938 dma_free_coherent(&qedf->pdev->dev, QEDF_BDQ_BUF_SIZE,
2939 qedf->bdq[i].buf_addr, qedf->bdq[i].buf_dma);
2940 }
2941 }
2942 }
2943
qedf_free_global_queues(struct qedf_ctx * qedf)2944 static void qedf_free_global_queues(struct qedf_ctx *qedf)
2945 {
2946 int i;
2947 struct global_queue **gl = qedf->global_queues;
2948
2949 for (i = 0; i < qedf->num_queues; i++) {
2950 if (!gl[i])
2951 continue;
2952
2953 if (gl[i]->cq)
2954 dma_free_coherent(&qedf->pdev->dev,
2955 gl[i]->cq_mem_size, gl[i]->cq, gl[i]->cq_dma);
2956 if (gl[i]->cq_pbl)
2957 dma_free_coherent(&qedf->pdev->dev, gl[i]->cq_pbl_size,
2958 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
2959
2960 kfree(gl[i]);
2961 }
2962
2963 qedf_free_bdq(qedf);
2964 }
2965
qedf_alloc_bdq(struct qedf_ctx * qedf)2966 static int qedf_alloc_bdq(struct qedf_ctx *qedf)
2967 {
2968 int i;
2969 struct scsi_bd *pbl;
2970 u64 *list;
2971
2972 /* Alloc dma memory for BDQ buffers */
2973 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2974 qedf->bdq[i].buf_addr = dma_alloc_coherent(&qedf->pdev->dev,
2975 QEDF_BDQ_BUF_SIZE, &qedf->bdq[i].buf_dma, GFP_KERNEL);
2976 if (!qedf->bdq[i].buf_addr) {
2977 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ "
2978 "buffer %d.\n", i);
2979 return -ENOMEM;
2980 }
2981 }
2982
2983 /* Alloc dma memory for BDQ page buffer list */
2984 qedf->bdq_pbl_mem_size =
2985 QEDF_BDQ_SIZE * sizeof(struct scsi_bd);
2986 qedf->bdq_pbl_mem_size =
2987 ALIGN(qedf->bdq_pbl_mem_size, QEDF_PAGE_SIZE);
2988
2989 qedf->bdq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
2990 qedf->bdq_pbl_mem_size, &qedf->bdq_pbl_dma, GFP_KERNEL);
2991 if (!qedf->bdq_pbl) {
2992 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ PBL.\n");
2993 return -ENOMEM;
2994 }
2995
2996 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2997 "BDQ PBL addr=0x%p dma=%pad\n",
2998 qedf->bdq_pbl, &qedf->bdq_pbl_dma);
2999
3000 /*
3001 * Populate BDQ PBL with physical and virtual address of individual
3002 * BDQ buffers
3003 */
3004 pbl = (struct scsi_bd *)qedf->bdq_pbl;
3005 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
3006 pbl->address.hi = cpu_to_le32(U64_HI(qedf->bdq[i].buf_dma));
3007 pbl->address.lo = cpu_to_le32(U64_LO(qedf->bdq[i].buf_dma));
3008 pbl->opaque.fcoe_opaque.hi = 0;
3009 /* Opaque lo data is an index into the BDQ array */
3010 pbl->opaque.fcoe_opaque.lo = cpu_to_le32(i);
3011 pbl++;
3012 }
3013
3014 /* Allocate list of PBL pages */
3015 qedf->bdq_pbl_list = dma_alloc_coherent(&qedf->pdev->dev,
3016 QEDF_PAGE_SIZE,
3017 &qedf->bdq_pbl_list_dma,
3018 GFP_KERNEL);
3019 if (!qedf->bdq_pbl_list) {
3020 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate list of PBL pages.\n");
3021 return -ENOMEM;
3022 }
3023
3024 /*
3025 * Now populate PBL list with pages that contain pointers to the
3026 * individual buffers.
3027 */
3028 qedf->bdq_pbl_list_num_entries = qedf->bdq_pbl_mem_size /
3029 QEDF_PAGE_SIZE;
3030 list = (u64 *)qedf->bdq_pbl_list;
3031 for (i = 0; i < qedf->bdq_pbl_list_num_entries; i++) {
3032 *list = qedf->bdq_pbl_dma;
3033 list++;
3034 }
3035
3036 return 0;
3037 }
3038
qedf_alloc_global_queues(struct qedf_ctx * qedf)3039 static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
3040 {
3041 u32 *list;
3042 int i;
3043 int status;
3044 u32 *pbl;
3045 dma_addr_t page;
3046 int num_pages;
3047
3048 /* Allocate and map CQs, RQs */
3049 /*
3050 * Number of global queues (CQ / RQ). This should
3051 * be <= number of available MSIX vectors for the PF
3052 */
3053 if (!qedf->num_queues) {
3054 QEDF_ERR(&(qedf->dbg_ctx), "No MSI-X vectors available!\n");
3055 return -ENOMEM;
3056 }
3057
3058 /*
3059 * Make sure we allocated the PBL that will contain the physical
3060 * addresses of our queues
3061 */
3062 if (!qedf->p_cpuq) {
3063 QEDF_ERR(&qedf->dbg_ctx, "p_cpuq is NULL.\n");
3064 return -EINVAL;
3065 }
3066
3067 qedf->global_queues = kzalloc((sizeof(struct global_queue *)
3068 * qedf->num_queues), GFP_KERNEL);
3069 if (!qedf->global_queues) {
3070 QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate global "
3071 "queues array ptr memory\n");
3072 return -ENOMEM;
3073 }
3074 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3075 "qedf->global_queues=%p.\n", qedf->global_queues);
3076
3077 /* Allocate DMA coherent buffers for BDQ */
3078 status = qedf_alloc_bdq(qedf);
3079 if (status) {
3080 QEDF_ERR(&qedf->dbg_ctx, "Unable to allocate bdq.\n");
3081 goto mem_alloc_failure;
3082 }
3083
3084 /* Allocate a CQ and an associated PBL for each MSI-X vector */
3085 for (i = 0; i < qedf->num_queues; i++) {
3086 qedf->global_queues[i] = kzalloc(sizeof(struct global_queue),
3087 GFP_KERNEL);
3088 if (!qedf->global_queues[i]) {
3089 QEDF_WARN(&(qedf->dbg_ctx), "Unable to allocate "
3090 "global queue %d.\n", i);
3091 status = -ENOMEM;
3092 goto mem_alloc_failure;
3093 }
3094
3095 qedf->global_queues[i]->cq_mem_size =
3096 FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
3097 qedf->global_queues[i]->cq_mem_size =
3098 ALIGN(qedf->global_queues[i]->cq_mem_size, QEDF_PAGE_SIZE);
3099
3100 qedf->global_queues[i]->cq_pbl_size =
3101 (qedf->global_queues[i]->cq_mem_size /
3102 PAGE_SIZE) * sizeof(void *);
3103 qedf->global_queues[i]->cq_pbl_size =
3104 ALIGN(qedf->global_queues[i]->cq_pbl_size, QEDF_PAGE_SIZE);
3105
3106 qedf->global_queues[i]->cq =
3107 dma_alloc_coherent(&qedf->pdev->dev,
3108 qedf->global_queues[i]->cq_mem_size,
3109 &qedf->global_queues[i]->cq_dma,
3110 GFP_KERNEL);
3111
3112 if (!qedf->global_queues[i]->cq) {
3113 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq.\n");
3114 status = -ENOMEM;
3115 goto mem_alloc_failure;
3116 }
3117
3118 qedf->global_queues[i]->cq_pbl =
3119 dma_alloc_coherent(&qedf->pdev->dev,
3120 qedf->global_queues[i]->cq_pbl_size,
3121 &qedf->global_queues[i]->cq_pbl_dma,
3122 GFP_KERNEL);
3123
3124 if (!qedf->global_queues[i]->cq_pbl) {
3125 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq PBL.\n");
3126 status = -ENOMEM;
3127 goto mem_alloc_failure;
3128 }
3129
3130 /* Create PBL */
3131 num_pages = qedf->global_queues[i]->cq_mem_size /
3132 QEDF_PAGE_SIZE;
3133 page = qedf->global_queues[i]->cq_dma;
3134 pbl = (u32 *)qedf->global_queues[i]->cq_pbl;
3135
3136 while (num_pages--) {
3137 *pbl = U64_LO(page);
3138 pbl++;
3139 *pbl = U64_HI(page);
3140 pbl++;
3141 page += QEDF_PAGE_SIZE;
3142 }
3143 /* Set the initial consumer index for cq */
3144 qedf->global_queues[i]->cq_cons_idx = 0;
3145 }
3146
3147 list = (u32 *)qedf->p_cpuq;
3148
3149 /*
3150 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
3151 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
3152 * to the physical address which contains an array of pointers to
3153 * the physical addresses of the specific queue pages.
3154 */
3155 for (i = 0; i < qedf->num_queues; i++) {
3156 *list = U64_LO(qedf->global_queues[i]->cq_pbl_dma);
3157 list++;
3158 *list = U64_HI(qedf->global_queues[i]->cq_pbl_dma);
3159 list++;
3160 *list = U64_LO(0);
3161 list++;
3162 *list = U64_HI(0);
3163 list++;
3164 }
3165
3166 return 0;
3167
3168 mem_alloc_failure:
3169 qedf_free_global_queues(qedf);
3170 return status;
3171 }
3172
qedf_set_fcoe_pf_param(struct qedf_ctx * qedf)3173 static int qedf_set_fcoe_pf_param(struct qedf_ctx *qedf)
3174 {
3175 u8 sq_num_pbl_pages;
3176 u32 sq_mem_size;
3177 u32 cq_mem_size;
3178 u32 cq_num_entries;
3179 int rval;
3180
3181 /*
3182 * The number of completion queues/fastpath interrupts/status blocks
3183 * we allocation is the minimum off:
3184 *
3185 * Number of CPUs
3186 * Number allocated by qed for our PCI function
3187 */
3188 qedf->num_queues = MIN_NUM_CPUS_MSIX(qedf);
3189
3190 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of CQs is %d.\n",
3191 qedf->num_queues);
3192
3193 qedf->p_cpuq = dma_alloc_coherent(&qedf->pdev->dev,
3194 qedf->num_queues * sizeof(struct qedf_glbl_q_params),
3195 &qedf->hw_p_cpuq, GFP_KERNEL);
3196
3197 if (!qedf->p_cpuq) {
3198 QEDF_ERR(&(qedf->dbg_ctx), "dma_alloc_coherent failed.\n");
3199 return 1;
3200 }
3201
3202 rval = qedf_alloc_global_queues(qedf);
3203 if (rval) {
3204 QEDF_ERR(&(qedf->dbg_ctx), "Global queue allocation "
3205 "failed.\n");
3206 return 1;
3207 }
3208
3209 /* Calculate SQ PBL size in the same manner as in qedf_sq_alloc() */
3210 sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
3211 sq_mem_size = ALIGN(sq_mem_size, QEDF_PAGE_SIZE);
3212 sq_num_pbl_pages = (sq_mem_size / QEDF_PAGE_SIZE);
3213
3214 /* Calculate CQ num entries */
3215 cq_mem_size = FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
3216 cq_mem_size = ALIGN(cq_mem_size, QEDF_PAGE_SIZE);
3217 cq_num_entries = cq_mem_size / sizeof(struct fcoe_cqe);
3218
3219 memset(&(qedf->pf_params), 0, sizeof(qedf->pf_params));
3220
3221 /* Setup the value for fcoe PF */
3222 qedf->pf_params.fcoe_pf_params.num_cons = QEDF_MAX_SESSIONS;
3223 qedf->pf_params.fcoe_pf_params.num_tasks = FCOE_PARAMS_NUM_TASKS;
3224 qedf->pf_params.fcoe_pf_params.glbl_q_params_addr =
3225 (u64)qedf->hw_p_cpuq;
3226 qedf->pf_params.fcoe_pf_params.sq_num_pbl_pages = sq_num_pbl_pages;
3227
3228 qedf->pf_params.fcoe_pf_params.rq_buffer_log_size = 0;
3229
3230 qedf->pf_params.fcoe_pf_params.cq_num_entries = cq_num_entries;
3231 qedf->pf_params.fcoe_pf_params.num_cqs = qedf->num_queues;
3232
3233 /* log_page_size: 12 for 4KB pages */
3234 qedf->pf_params.fcoe_pf_params.log_page_size = ilog2(QEDF_PAGE_SIZE);
3235
3236 qedf->pf_params.fcoe_pf_params.mtu = 9000;
3237 qedf->pf_params.fcoe_pf_params.gl_rq_pi = QEDF_FCOE_PARAMS_GL_RQ_PI;
3238 qedf->pf_params.fcoe_pf_params.gl_cmd_pi = QEDF_FCOE_PARAMS_GL_CMD_PI;
3239
3240 /* BDQ address and size */
3241 qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0] =
3242 qedf->bdq_pbl_list_dma;
3243 qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0] =
3244 qedf->bdq_pbl_list_num_entries;
3245 qedf->pf_params.fcoe_pf_params.rq_buffer_size = QEDF_BDQ_BUF_SIZE;
3246
3247 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3248 "bdq_list=%p bdq_pbl_list_dma=%llx bdq_pbl_list_entries=%d.\n",
3249 qedf->bdq_pbl_list,
3250 qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0],
3251 qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0]);
3252
3253 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3254 "cq_num_entries=%d.\n",
3255 qedf->pf_params.fcoe_pf_params.cq_num_entries);
3256
3257 return 0;
3258 }
3259
3260 /* Free DMA coherent memory for array of queue pointers we pass to qed */
qedf_free_fcoe_pf_param(struct qedf_ctx * qedf)3261 static void qedf_free_fcoe_pf_param(struct qedf_ctx *qedf)
3262 {
3263 size_t size = 0;
3264
3265 if (qedf->p_cpuq) {
3266 size = qedf->num_queues * sizeof(struct qedf_glbl_q_params);
3267 dma_free_coherent(&qedf->pdev->dev, size, qedf->p_cpuq,
3268 qedf->hw_p_cpuq);
3269 }
3270
3271 qedf_free_global_queues(qedf);
3272
3273 kfree(qedf->global_queues);
3274 }
3275
3276 /*
3277 * PCI driver functions
3278 */
3279
3280 static const struct pci_device_id qedf_pci_tbl[] = {
3281 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165c) },
3282 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8080) },
3283 {0}
3284 };
3285 MODULE_DEVICE_TABLE(pci, qedf_pci_tbl);
3286
3287 static struct pci_driver qedf_pci_driver = {
3288 .name = QEDF_MODULE_NAME,
3289 .id_table = qedf_pci_tbl,
3290 .probe = qedf_probe,
3291 .remove = qedf_remove,
3292 .shutdown = qedf_shutdown,
3293 .suspend = qedf_suspend,
3294 };
3295
__qedf_probe(struct pci_dev * pdev,int mode)3296 static int __qedf_probe(struct pci_dev *pdev, int mode)
3297 {
3298 int rc = -EINVAL;
3299 struct fc_lport *lport;
3300 struct qedf_ctx *qedf = NULL;
3301 struct Scsi_Host *host;
3302 bool is_vf = false;
3303 struct qed_ll2_params params;
3304 char host_buf[20];
3305 struct qed_link_params link_params;
3306 int status;
3307 void *task_start, *task_end;
3308 struct qed_slowpath_params slowpath_params;
3309 struct qed_probe_params qed_params;
3310 u16 retry_cnt = 10;
3311
3312 /*
3313 * When doing error recovery we didn't reap the lport so don't try
3314 * to reallocate it.
3315 */
3316 retry_probe:
3317 if (mode == QEDF_MODE_RECOVERY)
3318 msleep(2000);
3319
3320 if (mode != QEDF_MODE_RECOVERY) {
3321 lport = libfc_host_alloc(&qedf_host_template,
3322 sizeof(struct qedf_ctx));
3323
3324 if (!lport) {
3325 QEDF_ERR(NULL, "Could not allocate lport.\n");
3326 rc = -ENOMEM;
3327 goto err0;
3328 }
3329
3330 fc_disc_init(lport);
3331
3332 /* Initialize qedf_ctx */
3333 qedf = lport_priv(lport);
3334 set_bit(QEDF_PROBING, &qedf->flags);
3335 qedf->lport = lport;
3336 qedf->ctlr.lp = lport;
3337 qedf->pdev = pdev;
3338 qedf->dbg_ctx.pdev = pdev;
3339 qedf->dbg_ctx.host_no = lport->host->host_no;
3340 spin_lock_init(&qedf->hba_lock);
3341 INIT_LIST_HEAD(&qedf->fcports);
3342 qedf->curr_conn_id = QEDF_MAX_SESSIONS - 1;
3343 atomic_set(&qedf->num_offloads, 0);
3344 qedf->stop_io_on_error = false;
3345 pci_set_drvdata(pdev, qedf);
3346 init_completion(&qedf->fipvlan_compl);
3347 mutex_init(&qedf->stats_mutex);
3348 mutex_init(&qedf->flush_mutex);
3349 qedf->flogi_pending = 0;
3350
3351 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO,
3352 "QLogic FastLinQ FCoE Module qedf %s, "
3353 "FW %d.%d.%d.%d\n", QEDF_VERSION,
3354 FW_MAJOR_VERSION, FW_MINOR_VERSION, FW_REVISION_VERSION,
3355 FW_ENGINEERING_VERSION);
3356 } else {
3357 /* Init pointers during recovery */
3358 qedf = pci_get_drvdata(pdev);
3359 set_bit(QEDF_PROBING, &qedf->flags);
3360 lport = qedf->lport;
3361 }
3362
3363 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC, "Probe started.\n");
3364
3365 host = lport->host;
3366
3367 /* Allocate mempool for qedf_io_work structs */
3368 qedf->io_mempool = mempool_create_slab_pool(QEDF_IO_WORK_MIN,
3369 qedf_io_work_cache);
3370 if (qedf->io_mempool == NULL) {
3371 QEDF_ERR(&(qedf->dbg_ctx), "qedf->io_mempool is NULL.\n");
3372 goto err1;
3373 }
3374 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO, "qedf->io_mempool=%p.\n",
3375 qedf->io_mempool);
3376
3377 qedf->link_update_wq = alloc_workqueue("qedf_%u_link", WQ_MEM_RECLAIM,
3378 1, qedf->lport->host->host_no);
3379 INIT_DELAYED_WORK(&qedf->link_update, qedf_handle_link_update);
3380 INIT_DELAYED_WORK(&qedf->link_recovery, qedf_link_recovery);
3381 INIT_DELAYED_WORK(&qedf->grcdump_work, qedf_wq_grcdump);
3382 INIT_DELAYED_WORK(&qedf->stag_work, qedf_stag_change_work);
3383 qedf->fipvlan_retries = qedf_fipvlan_retries;
3384 /* Set a default prio in case DCBX doesn't converge */
3385 if (qedf_default_prio > -1) {
3386 /*
3387 * This is the case where we pass a modparam in so we want to
3388 * honor it even if dcbx doesn't converge.
3389 */
3390 qedf->prio = qedf_default_prio;
3391 } else
3392 qedf->prio = QEDF_DEFAULT_PRIO;
3393
3394 /*
3395 * Common probe. Takes care of basic hardware init and pci_*
3396 * functions.
3397 */
3398 memset(&qed_params, 0, sizeof(qed_params));
3399 qed_params.protocol = QED_PROTOCOL_FCOE;
3400 qed_params.dp_module = qedf_dp_module;
3401 qed_params.dp_level = qedf_dp_level;
3402 qed_params.is_vf = is_vf;
3403 qedf->cdev = qed_ops->common->probe(pdev, &qed_params);
3404 if (!qedf->cdev) {
3405 if ((mode == QEDF_MODE_RECOVERY) && retry_cnt) {
3406 QEDF_ERR(&qedf->dbg_ctx,
3407 "Retry %d initialize hardware\n", retry_cnt);
3408 retry_cnt--;
3409 goto retry_probe;
3410 }
3411 QEDF_ERR(&qedf->dbg_ctx, "common probe failed.\n");
3412 rc = -ENODEV;
3413 goto err1;
3414 }
3415
3416 /* Learn information crucial for qedf to progress */
3417 rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
3418 if (rc) {
3419 QEDF_ERR(&(qedf->dbg_ctx), "Failed to dev info.\n");
3420 goto err1;
3421 }
3422
3423 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
3424 "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
3425 qedf->dev_info.common.num_hwfns,
3426 qed_ops->common->get_affin_hwfn_idx(qedf->cdev));
3427
3428 /* queue allocation code should come here
3429 * order should be
3430 * slowpath_start
3431 * status block allocation
3432 * interrupt registration (to get min number of queues)
3433 * set_fcoe_pf_param
3434 * qed_sp_fcoe_func_start
3435 */
3436 rc = qedf_set_fcoe_pf_param(qedf);
3437 if (rc) {
3438 QEDF_ERR(&(qedf->dbg_ctx), "Cannot set fcoe pf param.\n");
3439 goto err2;
3440 }
3441 qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
3442
3443 /* Learn information crucial for qedf to progress */
3444 rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
3445 if (rc) {
3446 QEDF_ERR(&qedf->dbg_ctx, "Failed to fill dev info.\n");
3447 goto err2;
3448 }
3449
3450 if (mode != QEDF_MODE_RECOVERY) {
3451 qedf->devlink = qed_ops->common->devlink_register(qedf->cdev);
3452 if (IS_ERR(qedf->devlink)) {
3453 QEDF_ERR(&qedf->dbg_ctx, "Cannot register devlink\n");
3454 rc = PTR_ERR(qedf->devlink);
3455 qedf->devlink = NULL;
3456 goto err2;
3457 }
3458 }
3459
3460 /* Record BDQ producer doorbell addresses */
3461 qedf->bdq_primary_prod = qedf->dev_info.primary_dbq_rq_addr;
3462 qedf->bdq_secondary_prod = qedf->dev_info.secondary_bdq_rq_addr;
3463 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3464 "BDQ primary_prod=%p secondary_prod=%p.\n", qedf->bdq_primary_prod,
3465 qedf->bdq_secondary_prod);
3466
3467 qed_ops->register_ops(qedf->cdev, &qedf_cb_ops, qedf);
3468
3469 rc = qedf_prepare_sb(qedf);
3470 if (rc) {
3471
3472 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
3473 goto err2;
3474 }
3475
3476 /* Start the Slowpath-process */
3477 memset(&slowpath_params, 0, sizeof(struct qed_slowpath_params));
3478 slowpath_params.int_mode = QED_INT_MODE_MSIX;
3479 slowpath_params.drv_major = QEDF_DRIVER_MAJOR_VER;
3480 slowpath_params.drv_minor = QEDF_DRIVER_MINOR_VER;
3481 slowpath_params.drv_rev = QEDF_DRIVER_REV_VER;
3482 slowpath_params.drv_eng = QEDF_DRIVER_ENG_VER;
3483 strscpy(slowpath_params.name, "qedf", sizeof(slowpath_params.name));
3484 rc = qed_ops->common->slowpath_start(qedf->cdev, &slowpath_params);
3485 if (rc) {
3486 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
3487 goto err2;
3488 }
3489
3490 /*
3491 * update_pf_params needs to be called before and after slowpath
3492 * start
3493 */
3494 qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
3495
3496 /* Setup interrupts */
3497 rc = qedf_setup_int(qedf);
3498 if (rc) {
3499 QEDF_ERR(&qedf->dbg_ctx, "Setup interrupts failed.\n");
3500 goto err3;
3501 }
3502
3503 rc = qed_ops->start(qedf->cdev, &qedf->tasks);
3504 if (rc) {
3505 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start FCoE function.\n");
3506 goto err4;
3507 }
3508 task_start = qedf_get_task_mem(&qedf->tasks, 0);
3509 task_end = qedf_get_task_mem(&qedf->tasks, MAX_TID_BLOCKS_FCOE - 1);
3510 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Task context start=%p, "
3511 "end=%p block_size=%u.\n", task_start, task_end,
3512 qedf->tasks.size);
3513
3514 /*
3515 * We need to write the number of BDs in the BDQ we've preallocated so
3516 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
3517 * packet arrives.
3518 */
3519 qedf->bdq_prod_idx = QEDF_BDQ_SIZE;
3520 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3521 "Writing %d to primary and secondary BDQ doorbell registers.\n",
3522 qedf->bdq_prod_idx);
3523 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod);
3524 readw(qedf->bdq_primary_prod);
3525 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod);
3526 readw(qedf->bdq_secondary_prod);
3527
3528 qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3529
3530 /* Now that the dev_info struct has been filled in set the MAC
3531 * address
3532 */
3533 ether_addr_copy(qedf->mac, qedf->dev_info.common.hw_mac);
3534 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "MAC address is %pM.\n",
3535 qedf->mac);
3536
3537 /*
3538 * Set the WWNN and WWPN in the following way:
3539 *
3540 * If the info we get from qed is non-zero then use that to set the
3541 * WWPN and WWNN. Otherwise fall back to use fcoe_wwn_from_mac() based
3542 * on the MAC address.
3543 */
3544 if (qedf->dev_info.wwnn != 0 && qedf->dev_info.wwpn != 0) {
3545 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3546 "Setting WWPN and WWNN from qed dev_info.\n");
3547 qedf->wwnn = qedf->dev_info.wwnn;
3548 qedf->wwpn = qedf->dev_info.wwpn;
3549 } else {
3550 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3551 "Setting WWPN and WWNN using fcoe_wwn_from_mac().\n");
3552 qedf->wwnn = fcoe_wwn_from_mac(qedf->mac, 1, 0);
3553 qedf->wwpn = fcoe_wwn_from_mac(qedf->mac, 2, 0);
3554 }
3555 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "WWNN=%016llx "
3556 "WWPN=%016llx.\n", qedf->wwnn, qedf->wwpn);
3557
3558 sprintf(host_buf, "host_%d", host->host_no);
3559 qed_ops->common->set_name(qedf->cdev, host_buf);
3560
3561 /* Allocate cmd mgr */
3562 qedf->cmd_mgr = qedf_cmd_mgr_alloc(qedf);
3563 if (!qedf->cmd_mgr) {
3564 QEDF_ERR(&(qedf->dbg_ctx), "Failed to allocate cmd mgr.\n");
3565 rc = -ENOMEM;
3566 goto err5;
3567 }
3568
3569 if (mode != QEDF_MODE_RECOVERY) {
3570 host->transportt = qedf_fc_transport_template;
3571 host->max_lun = qedf_max_lun;
3572 host->max_cmd_len = QEDF_MAX_CDB_LEN;
3573 host->max_id = QEDF_MAX_SESSIONS;
3574 host->can_queue = FCOE_PARAMS_NUM_TASKS;
3575 rc = scsi_add_host(host, &pdev->dev);
3576 if (rc) {
3577 QEDF_WARN(&qedf->dbg_ctx,
3578 "Error adding Scsi_Host rc=0x%x.\n", rc);
3579 goto err6;
3580 }
3581 }
3582
3583 memset(¶ms, 0, sizeof(params));
3584 params.mtu = QEDF_LL2_BUF_SIZE;
3585 ether_addr_copy(params.ll2_mac_address, qedf->mac);
3586
3587 /* Start LL2 processing thread */
3588 qedf->ll2_recv_wq = alloc_workqueue("qedf_%d_ll2", WQ_MEM_RECLAIM, 1,
3589 host->host_no);
3590 if (!qedf->ll2_recv_wq) {
3591 QEDF_ERR(&(qedf->dbg_ctx), "Failed to LL2 workqueue.\n");
3592 rc = -ENOMEM;
3593 goto err7;
3594 }
3595
3596 #ifdef CONFIG_DEBUG_FS
3597 qedf_dbg_host_init(&(qedf->dbg_ctx), qedf_debugfs_ops,
3598 qedf_dbg_fops);
3599 #endif
3600
3601 /* Start LL2 */
3602 qed_ops->ll2->register_cb_ops(qedf->cdev, &qedf_ll2_cb_ops, qedf);
3603 rc = qed_ops->ll2->start(qedf->cdev, ¶ms);
3604 if (rc) {
3605 QEDF_ERR(&(qedf->dbg_ctx), "Could not start Light L2.\n");
3606 goto err7;
3607 }
3608 set_bit(QEDF_LL2_STARTED, &qedf->flags);
3609
3610 /* Set initial FIP/FCoE VLAN to NULL */
3611 qedf->vlan_id = 0;
3612
3613 /*
3614 * No need to setup fcoe_ctlr or fc_lport objects during recovery since
3615 * they were not reaped during the unload process.
3616 */
3617 if (mode != QEDF_MODE_RECOVERY) {
3618 /* Setup imbedded fcoe controller */
3619 qedf_fcoe_ctlr_setup(qedf);
3620
3621 /* Setup lport */
3622 rc = qedf_lport_setup(qedf);
3623 if (rc) {
3624 QEDF_ERR(&(qedf->dbg_ctx),
3625 "qedf_lport_setup failed.\n");
3626 goto err7;
3627 }
3628 }
3629
3630 qedf->timer_work_queue = alloc_workqueue("qedf_%u_timer",
3631 WQ_MEM_RECLAIM, 1, qedf->lport->host->host_no);
3632 if (!qedf->timer_work_queue) {
3633 QEDF_ERR(&(qedf->dbg_ctx), "Failed to start timer "
3634 "workqueue.\n");
3635 rc = -ENOMEM;
3636 goto err7;
3637 }
3638
3639 /* DPC workqueue is not reaped during recovery unload */
3640 if (mode != QEDF_MODE_RECOVERY) {
3641 sprintf(host_buf, "qedf_%u_dpc",
3642 qedf->lport->host->host_no);
3643 qedf->dpc_wq =
3644 alloc_workqueue("%s", WQ_MEM_RECLAIM, 1, host_buf);
3645 }
3646 INIT_DELAYED_WORK(&qedf->recovery_work, qedf_recovery_handler);
3647
3648 /*
3649 * GRC dump and sysfs parameters are not reaped during the recovery
3650 * unload process.
3651 */
3652 if (mode != QEDF_MODE_RECOVERY) {
3653 qedf->grcdump_size =
3654 qed_ops->common->dbg_all_data_size(qedf->cdev);
3655 if (qedf->grcdump_size) {
3656 rc = qedf_alloc_grc_dump_buf(&qedf->grcdump,
3657 qedf->grcdump_size);
3658 if (rc) {
3659 QEDF_ERR(&(qedf->dbg_ctx),
3660 "GRC Dump buffer alloc failed.\n");
3661 qedf->grcdump = NULL;
3662 }
3663
3664 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3665 "grcdump: addr=%p, size=%u.\n",
3666 qedf->grcdump, qedf->grcdump_size);
3667 }
3668 qedf_create_sysfs_ctx_attr(qedf);
3669
3670 /* Initialize I/O tracing for this adapter */
3671 spin_lock_init(&qedf->io_trace_lock);
3672 qedf->io_trace_idx = 0;
3673 }
3674
3675 init_completion(&qedf->flogi_compl);
3676
3677 status = qed_ops->common->update_drv_state(qedf->cdev, true);
3678 if (status)
3679 QEDF_ERR(&(qedf->dbg_ctx),
3680 "Failed to send drv state to MFW.\n");
3681
3682 memset(&link_params, 0, sizeof(struct qed_link_params));
3683 link_params.link_up = true;
3684 status = qed_ops->common->set_link(qedf->cdev, &link_params);
3685 if (status)
3686 QEDF_WARN(&(qedf->dbg_ctx), "set_link failed.\n");
3687
3688 /* Start/restart discovery */
3689 if (mode == QEDF_MODE_RECOVERY)
3690 fcoe_ctlr_link_up(&qedf->ctlr);
3691 else
3692 fc_fabric_login(lport);
3693
3694 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC, "Probe done.\n");
3695
3696 clear_bit(QEDF_PROBING, &qedf->flags);
3697
3698 /* All good */
3699 return 0;
3700
3701 err7:
3702 if (qedf->ll2_recv_wq)
3703 destroy_workqueue(qedf->ll2_recv_wq);
3704 fc_remove_host(qedf->lport->host);
3705 scsi_remove_host(qedf->lport->host);
3706 #ifdef CONFIG_DEBUG_FS
3707 qedf_dbg_host_exit(&(qedf->dbg_ctx));
3708 #endif
3709 err6:
3710 qedf_cmd_mgr_free(qedf->cmd_mgr);
3711 err5:
3712 qed_ops->stop(qedf->cdev);
3713 err4:
3714 qedf_free_fcoe_pf_param(qedf);
3715 qedf_sync_free_irqs(qedf);
3716 err3:
3717 qed_ops->common->slowpath_stop(qedf->cdev);
3718 err2:
3719 qed_ops->common->remove(qedf->cdev);
3720 err1:
3721 scsi_host_put(lport->host);
3722 err0:
3723 return rc;
3724 }
3725
qedf_probe(struct pci_dev * pdev,const struct pci_device_id * id)3726 static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3727 {
3728 return __qedf_probe(pdev, QEDF_MODE_NORMAL);
3729 }
3730
__qedf_remove(struct pci_dev * pdev,int mode)3731 static void __qedf_remove(struct pci_dev *pdev, int mode)
3732 {
3733 struct qedf_ctx *qedf;
3734 int rc;
3735 int cnt = 0;
3736
3737 if (!pdev) {
3738 QEDF_ERR(NULL, "pdev is NULL.\n");
3739 return;
3740 }
3741
3742 qedf = pci_get_drvdata(pdev);
3743
3744 /*
3745 * Prevent race where we're in board disable work and then try to
3746 * rmmod the module.
3747 */
3748 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
3749 QEDF_ERR(&qedf->dbg_ctx, "Already removing PCI function.\n");
3750 return;
3751 }
3752
3753 stag_in_prog:
3754 if (test_bit(QEDF_STAG_IN_PROGRESS, &qedf->flags)) {
3755 QEDF_ERR(&qedf->dbg_ctx, "Stag in progress, cnt=%d.\n", cnt);
3756 cnt++;
3757
3758 if (cnt < 5) {
3759 msleep(500);
3760 goto stag_in_prog;
3761 }
3762 }
3763
3764 if (mode != QEDF_MODE_RECOVERY)
3765 set_bit(QEDF_UNLOADING, &qedf->flags);
3766
3767 /* Logoff the fabric to upload all connections */
3768 if (mode == QEDF_MODE_RECOVERY)
3769 fcoe_ctlr_link_down(&qedf->ctlr);
3770 else
3771 fc_fabric_logoff(qedf->lport);
3772
3773 if (!qedf_wait_for_upload(qedf))
3774 QEDF_ERR(&qedf->dbg_ctx, "Could not upload all sessions.\n");
3775
3776 #ifdef CONFIG_DEBUG_FS
3777 qedf_dbg_host_exit(&(qedf->dbg_ctx));
3778 #endif
3779
3780 /* Stop any link update handling */
3781 cancel_delayed_work_sync(&qedf->link_update);
3782 destroy_workqueue(qedf->link_update_wq);
3783 qedf->link_update_wq = NULL;
3784
3785 if (qedf->timer_work_queue)
3786 destroy_workqueue(qedf->timer_work_queue);
3787
3788 /* Stop Light L2 */
3789 clear_bit(QEDF_LL2_STARTED, &qedf->flags);
3790 qed_ops->ll2->stop(qedf->cdev);
3791 if (qedf->ll2_recv_wq)
3792 destroy_workqueue(qedf->ll2_recv_wq);
3793
3794 /* Stop fastpath */
3795 qedf_sync_free_irqs(qedf);
3796 qedf_destroy_sb(qedf);
3797
3798 /*
3799 * During recovery don't destroy OS constructs that represent the
3800 * physical port.
3801 */
3802 if (mode != QEDF_MODE_RECOVERY) {
3803 qedf_free_grc_dump_buf(&qedf->grcdump);
3804 qedf_remove_sysfs_ctx_attr(qedf);
3805
3806 /* Remove all SCSI/libfc/libfcoe structures */
3807 fcoe_ctlr_destroy(&qedf->ctlr);
3808 fc_lport_destroy(qedf->lport);
3809 fc_remove_host(qedf->lport->host);
3810 scsi_remove_host(qedf->lport->host);
3811 }
3812
3813 qedf_cmd_mgr_free(qedf->cmd_mgr);
3814
3815 if (mode != QEDF_MODE_RECOVERY) {
3816 fc_exch_mgr_free(qedf->lport);
3817 fc_lport_free_stats(qedf->lport);
3818
3819 /* Wait for all vports to be reaped */
3820 qedf_wait_for_vport_destroy(qedf);
3821 }
3822
3823 /*
3824 * Now that all connections have been uploaded we can stop the
3825 * rest of the qed operations
3826 */
3827 qed_ops->stop(qedf->cdev);
3828
3829 if (mode != QEDF_MODE_RECOVERY) {
3830 if (qedf->dpc_wq) {
3831 /* Stop general DPC handling */
3832 destroy_workqueue(qedf->dpc_wq);
3833 qedf->dpc_wq = NULL;
3834 }
3835 }
3836
3837 /* Final shutdown for the board */
3838 qedf_free_fcoe_pf_param(qedf);
3839 if (mode != QEDF_MODE_RECOVERY) {
3840 qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3841 pci_set_drvdata(pdev, NULL);
3842 }
3843
3844 rc = qed_ops->common->update_drv_state(qedf->cdev, false);
3845 if (rc)
3846 QEDF_ERR(&(qedf->dbg_ctx),
3847 "Failed to send drv state to MFW.\n");
3848
3849 if (mode != QEDF_MODE_RECOVERY && qedf->devlink) {
3850 qed_ops->common->devlink_unregister(qedf->devlink);
3851 qedf->devlink = NULL;
3852 }
3853
3854 qed_ops->common->slowpath_stop(qedf->cdev);
3855 qed_ops->common->remove(qedf->cdev);
3856
3857 mempool_destroy(qedf->io_mempool);
3858
3859 /* Only reap the Scsi_host on a real removal */
3860 if (mode != QEDF_MODE_RECOVERY)
3861 scsi_host_put(qedf->lport->host);
3862 }
3863
qedf_remove(struct pci_dev * pdev)3864 static void qedf_remove(struct pci_dev *pdev)
3865 {
3866 /* Check to make sure this function wasn't already disabled */
3867 if (!atomic_read(&pdev->enable_cnt))
3868 return;
3869
3870 __qedf_remove(pdev, QEDF_MODE_NORMAL);
3871 }
3872
qedf_wq_grcdump(struct work_struct * work)3873 void qedf_wq_grcdump(struct work_struct *work)
3874 {
3875 struct qedf_ctx *qedf =
3876 container_of(work, struct qedf_ctx, grcdump_work.work);
3877
3878 QEDF_ERR(&(qedf->dbg_ctx), "Collecting GRC dump.\n");
3879 qedf_capture_grc_dump(qedf);
3880 }
3881
qedf_schedule_hw_err_handler(void * dev,enum qed_hw_err_type err_type)3882 void qedf_schedule_hw_err_handler(void *dev, enum qed_hw_err_type err_type)
3883 {
3884 struct qedf_ctx *qedf = dev;
3885
3886 QEDF_ERR(&(qedf->dbg_ctx),
3887 "Hardware error handler scheduled, event=%d.\n",
3888 err_type);
3889
3890 if (test_bit(QEDF_IN_RECOVERY, &qedf->flags)) {
3891 QEDF_ERR(&(qedf->dbg_ctx),
3892 "Already in recovery, not scheduling board disable work.\n");
3893 return;
3894 }
3895
3896 switch (err_type) {
3897 case QED_HW_ERR_FAN_FAIL:
3898 schedule_delayed_work(&qedf->board_disable_work, 0);
3899 break;
3900 case QED_HW_ERR_MFW_RESP_FAIL:
3901 case QED_HW_ERR_HW_ATTN:
3902 case QED_HW_ERR_DMAE_FAIL:
3903 case QED_HW_ERR_FW_ASSERT:
3904 /* Prevent HW attentions from being reasserted */
3905 qed_ops->common->attn_clr_enable(qedf->cdev, true);
3906 break;
3907 case QED_HW_ERR_RAMROD_FAIL:
3908 /* Prevent HW attentions from being reasserted */
3909 qed_ops->common->attn_clr_enable(qedf->cdev, true);
3910
3911 if (qedf_enable_recovery && qedf->devlink)
3912 qed_ops->common->report_fatal_error(qedf->devlink,
3913 err_type);
3914
3915 break;
3916 default:
3917 break;
3918 }
3919 }
3920
3921 /*
3922 * Protocol TLV handler
3923 */
qedf_get_protocol_tlv_data(void * dev,void * data)3924 void qedf_get_protocol_tlv_data(void *dev, void *data)
3925 {
3926 struct qedf_ctx *qedf = dev;
3927 struct qed_mfw_tlv_fcoe *fcoe = data;
3928 struct fc_lport *lport;
3929 struct Scsi_Host *host;
3930 struct fc_host_attrs *fc_host;
3931 struct fc_host_statistics *hst;
3932
3933 if (!qedf) {
3934 QEDF_ERR(NULL, "qedf is null.\n");
3935 return;
3936 }
3937
3938 if (test_bit(QEDF_PROBING, &qedf->flags)) {
3939 QEDF_ERR(&qedf->dbg_ctx, "Function is still probing.\n");
3940 return;
3941 }
3942
3943 lport = qedf->lport;
3944 host = lport->host;
3945 fc_host = shost_to_fc_host(host);
3946
3947 /* Force a refresh of the fc_host stats including offload stats */
3948 hst = qedf_fc_get_host_stats(host);
3949
3950 fcoe->qos_pri_set = true;
3951 fcoe->qos_pri = 3; /* Hard coded to 3 in driver */
3952
3953 fcoe->ra_tov_set = true;
3954 fcoe->ra_tov = lport->r_a_tov;
3955
3956 fcoe->ed_tov_set = true;
3957 fcoe->ed_tov = lport->e_d_tov;
3958
3959 fcoe->npiv_state_set = true;
3960 fcoe->npiv_state = 1; /* NPIV always enabled */
3961
3962 fcoe->num_npiv_ids_set = true;
3963 fcoe->num_npiv_ids = fc_host->npiv_vports_inuse;
3964
3965 /* Certain attributes we only want to set if we've selected an FCF */
3966 if (qedf->ctlr.sel_fcf) {
3967 fcoe->switch_name_set = true;
3968 u64_to_wwn(qedf->ctlr.sel_fcf->switch_name, fcoe->switch_name);
3969 }
3970
3971 fcoe->port_state_set = true;
3972 /* For qedf we're either link down or fabric attach */
3973 if (lport->link_up)
3974 fcoe->port_state = QED_MFW_TLV_PORT_STATE_FABRIC;
3975 else
3976 fcoe->port_state = QED_MFW_TLV_PORT_STATE_OFFLINE;
3977
3978 fcoe->link_failures_set = true;
3979 fcoe->link_failures = (u16)hst->link_failure_count;
3980
3981 fcoe->fcoe_txq_depth_set = true;
3982 fcoe->fcoe_rxq_depth_set = true;
3983 fcoe->fcoe_rxq_depth = FCOE_PARAMS_NUM_TASKS;
3984 fcoe->fcoe_txq_depth = FCOE_PARAMS_NUM_TASKS;
3985
3986 fcoe->fcoe_rx_frames_set = true;
3987 fcoe->fcoe_rx_frames = hst->rx_frames;
3988
3989 fcoe->fcoe_tx_frames_set = true;
3990 fcoe->fcoe_tx_frames = hst->tx_frames;
3991
3992 fcoe->fcoe_rx_bytes_set = true;
3993 fcoe->fcoe_rx_bytes = hst->fcp_input_megabytes * 1000000;
3994
3995 fcoe->fcoe_tx_bytes_set = true;
3996 fcoe->fcoe_tx_bytes = hst->fcp_output_megabytes * 1000000;
3997
3998 fcoe->crc_count_set = true;
3999 fcoe->crc_count = hst->invalid_crc_count;
4000
4001 fcoe->tx_abts_set = true;
4002 fcoe->tx_abts = hst->fcp_packet_aborts;
4003
4004 fcoe->tx_lun_rst_set = true;
4005 fcoe->tx_lun_rst = qedf->lun_resets;
4006
4007 fcoe->abort_task_sets_set = true;
4008 fcoe->abort_task_sets = qedf->packet_aborts;
4009
4010 fcoe->scsi_busy_set = true;
4011 fcoe->scsi_busy = qedf->busy;
4012
4013 fcoe->scsi_tsk_full_set = true;
4014 fcoe->scsi_tsk_full = qedf->task_set_fulls;
4015 }
4016
4017 /* Deferred work function to perform soft context reset on STAG change */
qedf_stag_change_work(struct work_struct * work)4018 void qedf_stag_change_work(struct work_struct *work)
4019 {
4020 struct qedf_ctx *qedf =
4021 container_of(work, struct qedf_ctx, stag_work.work);
4022
4023 if (test_bit(QEDF_IN_RECOVERY, &qedf->flags)) {
4024 QEDF_ERR(&qedf->dbg_ctx,
4025 "Already is in recovery, hence not calling software context reset.\n");
4026 return;
4027 }
4028
4029 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
4030 QEDF_ERR(&qedf->dbg_ctx, "Driver unloading\n");
4031 return;
4032 }
4033
4034 set_bit(QEDF_STAG_IN_PROGRESS, &qedf->flags);
4035
4036 printk_ratelimited("[%s]:[%s:%d]:%d: Performing software context reset.",
4037 dev_name(&qedf->pdev->dev), __func__, __LINE__,
4038 qedf->dbg_ctx.host_no);
4039 qedf_ctx_soft_reset(qedf->lport);
4040 }
4041
qedf_shutdown(struct pci_dev * pdev)4042 static void qedf_shutdown(struct pci_dev *pdev)
4043 {
4044 __qedf_remove(pdev, QEDF_MODE_NORMAL);
4045 }
4046
qedf_suspend(struct pci_dev * pdev,pm_message_t state)4047 static int qedf_suspend(struct pci_dev *pdev, pm_message_t state)
4048 {
4049 struct qedf_ctx *qedf;
4050
4051 if (!pdev) {
4052 QEDF_ERR(NULL, "pdev is NULL.\n");
4053 return -ENODEV;
4054 }
4055
4056 qedf = pci_get_drvdata(pdev);
4057
4058 QEDF_ERR(&qedf->dbg_ctx, "%s: Device does not support suspend operation\n", __func__);
4059
4060 return -EPERM;
4061 }
4062
4063 /*
4064 * Recovery handler code
4065 */
qedf_schedule_recovery_handler(void * dev)4066 static void qedf_schedule_recovery_handler(void *dev)
4067 {
4068 struct qedf_ctx *qedf = dev;
4069
4070 QEDF_ERR(&qedf->dbg_ctx, "Recovery handler scheduled.\n");
4071 schedule_delayed_work(&qedf->recovery_work, 0);
4072 }
4073
qedf_recovery_handler(struct work_struct * work)4074 static void qedf_recovery_handler(struct work_struct *work)
4075 {
4076 struct qedf_ctx *qedf =
4077 container_of(work, struct qedf_ctx, recovery_work.work);
4078
4079 if (test_and_set_bit(QEDF_IN_RECOVERY, &qedf->flags))
4080 return;
4081
4082 /*
4083 * Call common_ops->recovery_prolog to allow the MFW to quiesce
4084 * any PCI transactions.
4085 */
4086 qed_ops->common->recovery_prolog(qedf->cdev);
4087
4088 QEDF_ERR(&qedf->dbg_ctx, "Recovery work start.\n");
4089 __qedf_remove(qedf->pdev, QEDF_MODE_RECOVERY);
4090 /*
4091 * Reset link and dcbx to down state since we will not get a link down
4092 * event from the MFW but calling __qedf_remove will essentially be a
4093 * link down event.
4094 */
4095 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
4096 atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
4097 __qedf_probe(qedf->pdev, QEDF_MODE_RECOVERY);
4098 clear_bit(QEDF_IN_RECOVERY, &qedf->flags);
4099 QEDF_ERR(&qedf->dbg_ctx, "Recovery work complete.\n");
4100 }
4101
4102 /* Generic TLV data callback */
qedf_get_generic_tlv_data(void * dev,struct qed_generic_tlvs * data)4103 void qedf_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
4104 {
4105 struct qedf_ctx *qedf;
4106
4107 if (!dev) {
4108 QEDF_INFO(NULL, QEDF_LOG_EVT,
4109 "dev is NULL so ignoring get_generic_tlv_data request.\n");
4110 return;
4111 }
4112 qedf = (struct qedf_ctx *)dev;
4113
4114 memset(data, 0, sizeof(struct qed_generic_tlvs));
4115 ether_addr_copy(data->mac[0], qedf->mac);
4116 }
4117
4118 /*
4119 * Module Init/Remove
4120 */
4121
qedf_init(void)4122 static int __init qedf_init(void)
4123 {
4124 int ret;
4125
4126 /* If debug=1 passed, set the default log mask */
4127 if (qedf_debug == QEDF_LOG_DEFAULT)
4128 qedf_debug = QEDF_DEFAULT_LOG_MASK;
4129
4130 /*
4131 * Check that default prio for FIP/FCoE traffic is between 0..7 if a
4132 * value has been set
4133 */
4134 if (qedf_default_prio > -1)
4135 if (qedf_default_prio > 7) {
4136 qedf_default_prio = QEDF_DEFAULT_PRIO;
4137 QEDF_ERR(NULL, "FCoE/FIP priority out of range, resetting to %d.\n",
4138 QEDF_DEFAULT_PRIO);
4139 }
4140
4141 /* Print driver banner */
4142 QEDF_INFO(NULL, QEDF_LOG_INFO, "%s v%s.\n", QEDF_DESCR,
4143 QEDF_VERSION);
4144
4145 /* Create kmem_cache for qedf_io_work structs */
4146 qedf_io_work_cache = kmem_cache_create("qedf_io_work_cache",
4147 sizeof(struct qedf_io_work), 0, SLAB_HWCACHE_ALIGN, NULL);
4148 if (qedf_io_work_cache == NULL) {
4149 QEDF_ERR(NULL, "qedf_io_work_cache is NULL.\n");
4150 goto err1;
4151 }
4152 QEDF_INFO(NULL, QEDF_LOG_DISC, "qedf_io_work_cache=%p.\n",
4153 qedf_io_work_cache);
4154
4155 qed_ops = qed_get_fcoe_ops();
4156 if (!qed_ops) {
4157 QEDF_ERR(NULL, "Failed to get qed fcoe operations\n");
4158 goto err1;
4159 }
4160
4161 #ifdef CONFIG_DEBUG_FS
4162 qedf_dbg_init("qedf");
4163 #endif
4164
4165 qedf_fc_transport_template =
4166 fc_attach_transport(&qedf_fc_transport_fn);
4167 if (!qedf_fc_transport_template) {
4168 QEDF_ERR(NULL, "Could not register with FC transport\n");
4169 goto err2;
4170 }
4171
4172 qedf_fc_vport_transport_template =
4173 fc_attach_transport(&qedf_fc_vport_transport_fn);
4174 if (!qedf_fc_vport_transport_template) {
4175 QEDF_ERR(NULL, "Could not register vport template with FC "
4176 "transport\n");
4177 goto err3;
4178 }
4179
4180 qedf_io_wq = alloc_workqueue("%s", WQ_MEM_RECLAIM, 1, "qedf_io_wq");
4181 if (!qedf_io_wq) {
4182 QEDF_ERR(NULL, "Could not create qedf_io_wq.\n");
4183 goto err4;
4184 }
4185
4186 qedf_cb_ops.get_login_failures = qedf_get_login_failures;
4187
4188 ret = pci_register_driver(&qedf_pci_driver);
4189 if (ret) {
4190 QEDF_ERR(NULL, "Failed to register driver\n");
4191 goto err5;
4192 }
4193
4194 return 0;
4195
4196 err5:
4197 destroy_workqueue(qedf_io_wq);
4198 err4:
4199 fc_release_transport(qedf_fc_vport_transport_template);
4200 err3:
4201 fc_release_transport(qedf_fc_transport_template);
4202 err2:
4203 #ifdef CONFIG_DEBUG_FS
4204 qedf_dbg_exit();
4205 #endif
4206 qed_put_fcoe_ops();
4207 err1:
4208 return -EINVAL;
4209 }
4210
qedf_cleanup(void)4211 static void __exit qedf_cleanup(void)
4212 {
4213 pci_unregister_driver(&qedf_pci_driver);
4214
4215 destroy_workqueue(qedf_io_wq);
4216
4217 fc_release_transport(qedf_fc_vport_transport_template);
4218 fc_release_transport(qedf_fc_transport_template);
4219 #ifdef CONFIG_DEBUG_FS
4220 qedf_dbg_exit();
4221 #endif
4222 qed_put_fcoe_ops();
4223
4224 kmem_cache_destroy(qedf_io_work_cache);
4225 }
4226
4227 MODULE_LICENSE("GPL");
4228 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx FCoE Module");
4229 MODULE_AUTHOR("QLogic Corporation");
4230 MODULE_VERSION(QEDF_VERSION);
4231 module_init(qedf_init);
4232 module_exit(qedf_cleanup);
4233