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Merge tag 'ceph-for-4.13-rc8' of git://github.com/ceph/ceph-client
[linux/fpc-iii.git] / drivers / scsi / qedf / qedf_main.c
blob1d13c9ca517de7e2cec033bdf050498fafbfeccc
1 /*
2 * QLogic FCoE Offload Driver
3 * Copyright (c) 2016-2017 Cavium Inc.
4 *
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
7 * this source tree.
8 */
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/pci.h>
13 #include <linux/device.h>
14 #include <linux/highmem.h>
15 #include <linux/crc32.h>
16 #include <linux/interrupt.h>
17 #include <linux/list.h>
18 #include <linux/kthread.h>
19 #include <scsi/libfc.h>
20 #include <scsi/scsi_host.h>
21 #include <linux/if_ether.h>
22 #include <linux/if_vlan.h>
23 #include <linux/cpu.h>
24 #include "qedf.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
32 extern struct qedf_debugfs_ops qedf_debugfs_ops;
33 extern struct file_operations qedf_dbg_fops;
34
35 /*
36 * Driver module parameters.
37 */
38 static unsigned int qedf_dev_loss_tmo = 60;
39 module_param_named(dev_loss_tmo, qedf_dev_loss_tmo, int, S_IRUGO);
40 MODULE_PARM_DESC(dev_loss_tmo, " dev_loss_tmo setting for attached "
41 "remote ports (default 60)");
42
43 uint qedf_debug = QEDF_LOG_INFO;
44 module_param_named(debug, qedf_debug, uint, S_IRUGO);
45 MODULE_PARM_DESC(qedf_debug, " Debug mask. Pass '1' to enable default debugging"
46 " mask");
47
48 static uint qedf_fipvlan_retries = 30;
49 module_param_named(fipvlan_retries, qedf_fipvlan_retries, int, S_IRUGO);
50 MODULE_PARM_DESC(fipvlan_retries, " Number of FIP VLAN requests to attempt "
51 "before giving up (default 30)");
52
53 static uint qedf_fallback_vlan = QEDF_FALLBACK_VLAN;
54 module_param_named(fallback_vlan, qedf_fallback_vlan, int, S_IRUGO);
55 MODULE_PARM_DESC(fallback_vlan, " VLAN ID to try if fip vlan request fails "
56 "(default 1002).");
57
58 static uint qedf_default_prio = QEDF_DEFAULT_PRIO;
59 module_param_named(default_prio, qedf_default_prio, int, S_IRUGO);
60 MODULE_PARM_DESC(default_prio, " Default 802.1q priority for FIP and FCoE"
61 " traffic (default 3).");
62
63 uint qedf_dump_frames;
64 module_param_named(dump_frames, qedf_dump_frames, int, S_IRUGO | S_IWUSR);
65 MODULE_PARM_DESC(dump_frames, " Print the skb data of FIP and FCoE frames "
66 "(default off)");
67
68 static uint qedf_queue_depth;
69 module_param_named(queue_depth, qedf_queue_depth, int, S_IRUGO);
70 MODULE_PARM_DESC(queue_depth, " Sets the queue depth for all LUNs discovered "
71 "by the qedf driver. Default is 0 (use OS default).");
72
73 uint qedf_io_tracing;
74 module_param_named(io_tracing, qedf_io_tracing, int, S_IRUGO | S_IWUSR);
75 MODULE_PARM_DESC(io_tracing, " Enable logging of SCSI requests/completions "
76 "into trace buffer. (default off).");
77
78 static uint qedf_max_lun = MAX_FIBRE_LUNS;
79 module_param_named(max_lun, qedf_max_lun, int, S_IRUGO);
80 MODULE_PARM_DESC(max_lun, " Sets the maximum luns per target that the driver "
81 "supports. (default 0xffffffff)");
82
83 uint qedf_link_down_tmo;
84 module_param_named(link_down_tmo, qedf_link_down_tmo, int, S_IRUGO);
85 MODULE_PARM_DESC(link_down_tmo, " Delays informing the fcoe transport that the "
86 "link is down by N seconds.");
87
88 bool qedf_retry_delay;
89 module_param_named(retry_delay, qedf_retry_delay, bool, S_IRUGO | S_IWUSR);
90 MODULE_PARM_DESC(retry_delay, " Enable/disable handling of FCP_RSP IU retry "
91 "delay handling (default off).");
92
93 static uint qedf_dp_module;
94 module_param_named(dp_module, qedf_dp_module, uint, S_IRUGO);
95 MODULE_PARM_DESC(dp_module, " bit flags control for verbose printk passed "
96 "qed module during probe.");
97
98 static uint qedf_dp_level = QED_LEVEL_NOTICE;
99 module_param_named(dp_level, qedf_dp_level, uint, S_IRUGO);
100 MODULE_PARM_DESC(dp_level, " printk verbosity control passed to qed module "
101 "during probe (0-3: 0 more verbose).");
102
103 struct workqueue_struct *qedf_io_wq;
104
105 static struct fcoe_percpu_s qedf_global;
106 static DEFINE_SPINLOCK(qedf_global_lock);
107
108 static struct kmem_cache *qedf_io_work_cache;
109
110 void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id)
111 {
112 qedf->vlan_id = vlan_id;
113 qedf->vlan_id |= qedf_default_prio << VLAN_PRIO_SHIFT;
114 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Setting vlan_id=%04x "
115 "prio=%d.\n", vlan_id, qedf_default_prio);
116 }
117
118 /* Returns true if we have a valid vlan, false otherwise */
119 static bool qedf_initiate_fipvlan_req(struct qedf_ctx *qedf)
120 {
121 int rc;
122
123 if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
124 QEDF_ERR(&(qedf->dbg_ctx), "Link not up.\n");
125 return false;
126 }
127
128 while (qedf->fipvlan_retries--) {
129 if (qedf->vlan_id > 0)
130 return true;
131 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
132 "Retry %d.\n", qedf->fipvlan_retries);
133 init_completion(&qedf->fipvlan_compl);
134 qedf_fcoe_send_vlan_req(qedf);
135 rc = wait_for_completion_timeout(&qedf->fipvlan_compl,
136 1 * HZ);
137 if (rc > 0) {
138 fcoe_ctlr_link_up(&qedf->ctlr);
139 return true;
140 }
141 }
142
143 return false;
144 }
145
146 static void qedf_handle_link_update(struct work_struct *work)
147 {
148 struct qedf_ctx *qedf =
149 container_of(work, struct qedf_ctx, link_update.work);
150 int rc;
151
152 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Entered.\n");
153
154 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
155 rc = qedf_initiate_fipvlan_req(qedf);
156 if (rc)
157 return;
158 /*
159 * If we get here then we never received a repsonse to our
160 * fip vlan request so set the vlan_id to the default and
161 * tell FCoE that the link is up
162 */
163 QEDF_WARN(&(qedf->dbg_ctx), "Did not receive FIP VLAN "
164 "response, falling back to default VLAN %d.\n",
165 qedf_fallback_vlan);
166 qedf_set_vlan_id(qedf, QEDF_FALLBACK_VLAN);
167
168 /*
169 * Zero out data_src_addr so we'll update it with the new
170 * lport port_id
171 */
172 eth_zero_addr(qedf->data_src_addr);
173 fcoe_ctlr_link_up(&qedf->ctlr);
174 } else if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
175 /*
176 * If we hit here and link_down_tmo_valid is still 1 it means
177 * that link_down_tmo timed out so set it to 0 to make sure any
178 * other readers have accurate state.
179 */
180 atomic_set(&qedf->link_down_tmo_valid, 0);
181 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
182 "Calling fcoe_ctlr_link_down().\n");
183 fcoe_ctlr_link_down(&qedf->ctlr);
184 qedf_wait_for_upload(qedf);
185 /* Reset the number of FIP VLAN retries */
186 qedf->fipvlan_retries = qedf_fipvlan_retries;
187 }
188 }
189
190 static void qedf_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
191 void *arg)
192 {
193 struct fc_exch *exch = fc_seq_exch(seq);
194 struct fc_lport *lport = exch->lp;
195 struct qedf_ctx *qedf = lport_priv(lport);
196
197 if (!qedf) {
198 QEDF_ERR(NULL, "qedf is NULL.\n");
199 return;
200 }
201
202 /*
203 * If ERR_PTR is set then don't try to stat anything as it will cause
204 * a crash when we access fp.
205 */
206 if (IS_ERR(fp)) {
207 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
208 "fp has IS_ERR() set.\n");
209 goto skip_stat;
210 }
211
212 /* Log stats for FLOGI reject */
213 if (fc_frame_payload_op(fp) == ELS_LS_RJT)
214 qedf->flogi_failed++;
215
216 /* Complete flogi_compl so we can proceed to sending ADISCs */
217 complete(&qedf->flogi_compl);
218
219 skip_stat:
220 /* Report response to libfc */
221 fc_lport_flogi_resp(seq, fp, lport);
222 }
223
224 static struct fc_seq *qedf_elsct_send(struct fc_lport *lport, u32 did,
225 struct fc_frame *fp, unsigned int op,
226 void (*resp)(struct fc_seq *,
227 struct fc_frame *,
228 void *),
229 void *arg, u32 timeout)
230 {
231 struct qedf_ctx *qedf = lport_priv(lport);
232
233 /*
234 * Intercept FLOGI for statistic purposes. Note we use the resp
235 * callback to tell if this is really a flogi.
236 */
237 if (resp == fc_lport_flogi_resp) {
238 qedf->flogi_cnt++;
239 return fc_elsct_send(lport, did, fp, op, qedf_flogi_resp,
240 arg, timeout);
241 }
242
243 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
244 }
245
246 int qedf_send_flogi(struct qedf_ctx *qedf)
247 {
248 struct fc_lport *lport;
249 struct fc_frame *fp;
250
251 lport = qedf->lport;
252
253 if (!lport->tt.elsct_send)
254 return -EINVAL;
255
256 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
257 if (!fp) {
258 QEDF_ERR(&(qedf->dbg_ctx), "fc_frame_alloc failed.\n");
259 return -ENOMEM;
260 }
261
262 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
263 "Sending FLOGI to reestablish session with switch.\n");
264 lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
265 ELS_FLOGI, qedf_flogi_resp, lport, lport->r_a_tov);
266
267 init_completion(&qedf->flogi_compl);
268
269 return 0;
270 }
271
272 struct qedf_tmp_rdata_item {
273 struct fc_rport_priv *rdata;
274 struct list_head list;
275 };
276
277 /*
278 * This function is called if link_down_tmo is in use. If we get a link up and
279 * link_down_tmo has not expired then use just FLOGI/ADISC to recover our
280 * sessions with targets. Otherwise, just call fcoe_ctlr_link_up().
281 */
282 static void qedf_link_recovery(struct work_struct *work)
283 {
284 struct qedf_ctx *qedf =
285 container_of(work, struct qedf_ctx, link_recovery.work);
286 struct qedf_rport *fcport;
287 struct fc_rport_priv *rdata;
288 struct qedf_tmp_rdata_item *rdata_item, *tmp_rdata_item;
289 bool rc;
290 int retries = 30;
291 int rval, i;
292 struct list_head rdata_login_list;
293
294 INIT_LIST_HEAD(&rdata_login_list);
295
296 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
297 "Link down tmo did not expire.\n");
298
299 /*
300 * Essentially reset the fcoe_ctlr here without affecting the state
301 * of the libfc structs.
302 */
303 qedf->ctlr.state = FIP_ST_LINK_WAIT;
304 fcoe_ctlr_link_down(&qedf->ctlr);
305
306 /*
307 * Bring the link up before we send the fipvlan request so libfcoe
308 * can select a new fcf in parallel
309 */
310 fcoe_ctlr_link_up(&qedf->ctlr);
311
312 /* Since the link when down and up to verify which vlan we're on */
313 qedf->fipvlan_retries = qedf_fipvlan_retries;
314 rc = qedf_initiate_fipvlan_req(qedf);
315 if (!rc)
316 return;
317
318 /*
319 * We need to wait for an FCF to be selected due to the
320 * fcoe_ctlr_link_up other the FLOGI will be rejected.
321 */
322 while (retries > 0) {
323 if (qedf->ctlr.sel_fcf) {
324 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
325 "FCF reselected, proceeding with FLOGI.\n");
326 break;
327 }
328 msleep(500);
329 retries--;
330 }
331
332 if (retries < 1) {
333 QEDF_ERR(&(qedf->dbg_ctx), "Exhausted retries waiting for "
334 "FCF selection.\n");
335 return;
336 }
337
338 rval = qedf_send_flogi(qedf);
339 if (rval)
340 return;
341
342 /* Wait for FLOGI completion before proceeding with sending ADISCs */
343 i = wait_for_completion_timeout(&qedf->flogi_compl,
344 qedf->lport->r_a_tov);
345 if (i == 0) {
346 QEDF_ERR(&(qedf->dbg_ctx), "FLOGI timed out.\n");
347 return;
348 }
349
350 /*
351 * Call lport->tt.rport_login which will cause libfc to send an
352 * ADISC since the rport is in state ready.
353 */
354 rcu_read_lock();
355 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
356 rdata = fcport->rdata;
357 if (rdata == NULL)
358 continue;
359 rdata_item = kzalloc(sizeof(struct qedf_tmp_rdata_item),
360 GFP_ATOMIC);
361 if (!rdata_item)
362 continue;
363 if (kref_get_unless_zero(&rdata->kref)) {
364 rdata_item->rdata = rdata;
365 list_add(&rdata_item->list, &rdata_login_list);
366 } else
367 kfree(rdata_item);
368 }
369 rcu_read_unlock();
370 /*
371 * Do the fc_rport_login outside of the rcu lock so we don't take a
372 * mutex in an atomic context.
373 */
374 list_for_each_entry_safe(rdata_item, tmp_rdata_item, &rdata_login_list,
375 list) {
376 list_del(&rdata_item->list);
377 fc_rport_login(rdata_item->rdata);
378 kref_put(&rdata_item->rdata->kref, fc_rport_destroy);
379 kfree(rdata_item);
380 }
381 }
382
383 static void qedf_update_link_speed(struct qedf_ctx *qedf,
384 struct qed_link_output *link)
385 {
386 struct fc_lport *lport = qedf->lport;
387
388 lport->link_speed = FC_PORTSPEED_UNKNOWN;
389 lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
390
391 /* Set fc_host link speed */
392 switch (link->speed) {
393 case 10000:
394 lport->link_speed = FC_PORTSPEED_10GBIT;
395 break;
396 case 25000:
397 lport->link_speed = FC_PORTSPEED_25GBIT;
398 break;
399 case 40000:
400 lport->link_speed = FC_PORTSPEED_40GBIT;
401 break;
402 case 50000:
403 lport->link_speed = FC_PORTSPEED_50GBIT;
404 break;
405 case 100000:
406 lport->link_speed = FC_PORTSPEED_100GBIT;
407 break;
408 default:
409 lport->link_speed = FC_PORTSPEED_UNKNOWN;
410 break;
411 }
412
413 /*
414 * Set supported link speed by querying the supported
415 * capabilities of the link.
416 */
417 if (link->supported_caps & SUPPORTED_10000baseKR_Full)
418 lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
419 if (link->supported_caps & SUPPORTED_25000baseKR_Full)
420 lport->link_supported_speeds |= FC_PORTSPEED_25GBIT;
421 if (link->supported_caps & SUPPORTED_40000baseLR4_Full)
422 lport->link_supported_speeds |= FC_PORTSPEED_40GBIT;
423 if (link->supported_caps & SUPPORTED_50000baseKR2_Full)
424 lport->link_supported_speeds |= FC_PORTSPEED_50GBIT;
425 if (link->supported_caps & SUPPORTED_100000baseKR4_Full)
426 lport->link_supported_speeds |= FC_PORTSPEED_100GBIT;
427 fc_host_supported_speeds(lport->host) = lport->link_supported_speeds;
428 }
429
430 static void qedf_link_update(void *dev, struct qed_link_output *link)
431 {
432 struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
433
434 if (link->link_up) {
435 QEDF_ERR(&(qedf->dbg_ctx), "LINK UP (%d GB/s).\n",
436 link->speed / 1000);
437
438 /* Cancel any pending link down work */
439 cancel_delayed_work(&qedf->link_update);
440
441 atomic_set(&qedf->link_state, QEDF_LINK_UP);
442 qedf_update_link_speed(qedf, link);
443
444 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
445 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
446 "DCBx done.\n");
447 if (atomic_read(&qedf->link_down_tmo_valid) > 0)
448 queue_delayed_work(qedf->link_update_wq,
449 &qedf->link_recovery, 0);
450 else
451 queue_delayed_work(qedf->link_update_wq,
452 &qedf->link_update, 0);
453 atomic_set(&qedf->link_down_tmo_valid, 0);
454 }
455
456 } else {
457 QEDF_ERR(&(qedf->dbg_ctx), "LINK DOWN.\n");
458
459 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
460 atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
461 /*
462 * Flag that we're waiting for the link to come back up before
463 * informing the fcoe layer of the event.
464 */
465 if (qedf_link_down_tmo > 0) {
466 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
467 "Starting link down tmo.\n");
468 atomic_set(&qedf->link_down_tmo_valid, 1);
469 }
470 qedf->vlan_id = 0;
471 qedf_update_link_speed(qedf, link);
472 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
473 qedf_link_down_tmo * HZ);
474 }
475 }
476
477
478 static void qedf_dcbx_handler(void *dev, struct qed_dcbx_get *get, u32 mib_type)
479 {
480 struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
481
482 QEDF_ERR(&(qedf->dbg_ctx), "DCBx event valid=%d enabled=%d fcoe "
483 "prio=%d.\n", get->operational.valid, get->operational.enabled,
484 get->operational.app_prio.fcoe);
485
486 if (get->operational.enabled && get->operational.valid) {
487 /* If DCBX was already negotiated on link up then just exit */
488 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
489 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
490 "DCBX already set on link up.\n");
491 return;
492 }
493
494 atomic_set(&qedf->dcbx, QEDF_DCBX_DONE);
495
496 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
497 if (atomic_read(&qedf->link_down_tmo_valid) > 0)
498 queue_delayed_work(qedf->link_update_wq,
499 &qedf->link_recovery, 0);
500 else
501 queue_delayed_work(qedf->link_update_wq,
502 &qedf->link_update, 0);
503 atomic_set(&qedf->link_down_tmo_valid, 0);
504 }
505 }
506
507 }
508
509 static u32 qedf_get_login_failures(void *cookie)
510 {
511 struct qedf_ctx *qedf;
512
513 qedf = (struct qedf_ctx *)cookie;
514 return qedf->flogi_failed;
515 }
516
517 static struct qed_fcoe_cb_ops qedf_cb_ops = {
518 {
519 .link_update = qedf_link_update,
520 .dcbx_aen = qedf_dcbx_handler,
521 }
522 };
523
524 /*
525 * Various transport templates.
526 */
527
528 static struct scsi_transport_template *qedf_fc_transport_template;
529 static struct scsi_transport_template *qedf_fc_vport_transport_template;
530
531 /*
532 * SCSI EH handlers
533 */
534 static int qedf_eh_abort(struct scsi_cmnd *sc_cmd)
535 {
536 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
537 struct fc_rport_libfc_priv *rp = rport->dd_data;
538 struct qedf_rport *fcport;
539 struct fc_lport *lport;
540 struct qedf_ctx *qedf;
541 struct qedf_ioreq *io_req;
542 int rc = FAILED;
543 int rval;
544
545 if (fc_remote_port_chkready(rport)) {
546 QEDF_ERR(NULL, "rport not ready\n");
547 goto out;
548 }
549
550 lport = shost_priv(sc_cmd->device->host);
551 qedf = (struct qedf_ctx *)lport_priv(lport);
552
553 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
554 QEDF_ERR(&(qedf->dbg_ctx), "link not ready.\n");
555 goto out;
556 }
557
558 fcport = (struct qedf_rport *)&rp[1];
559
560 io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr;
561 if (!io_req) {
562 QEDF_ERR(&(qedf->dbg_ctx), "io_req is NULL.\n");
563 rc = SUCCESS;
564 goto out;
565 }
566
567 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) ||
568 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) ||
569 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) {
570 QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in "
571 "cleanup or abort processing or already "
572 "completed.\n", io_req->xid);
573 rc = SUCCESS;
574 goto out;
575 }
576
577 QEDF_ERR(&(qedf->dbg_ctx), "Aborting io_req sc_cmd=%p xid=0x%x "
578 "fp_idx=%d.\n", sc_cmd, io_req->xid, io_req->fp_idx);
579
580 if (qedf->stop_io_on_error) {
581 qedf_stop_all_io(qedf);
582 rc = SUCCESS;
583 goto out;
584 }
585
586 init_completion(&io_req->abts_done);
587 rval = qedf_initiate_abts(io_req, true);
588 if (rval) {
589 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
590 goto out;
591 }
592
593 wait_for_completion(&io_req->abts_done);
594
595 if (io_req->event == QEDF_IOREQ_EV_ABORT_SUCCESS ||
596 io_req->event == QEDF_IOREQ_EV_ABORT_FAILED ||
597 io_req->event == QEDF_IOREQ_EV_CLEANUP_SUCCESS) {
598 /*
599 * If we get a reponse to the abort this is success from
600 * the perspective that all references to the command have
601 * been removed from the driver and firmware
602 */
603 rc = SUCCESS;
604 } else {
605 /* If the abort and cleanup failed then return a failure */
606 rc = FAILED;
607 }
608
609 if (rc == SUCCESS)
610 QEDF_ERR(&(qedf->dbg_ctx), "ABTS succeeded, xid=0x%x.\n",
611 io_req->xid);
612 else
613 QEDF_ERR(&(qedf->dbg_ctx), "ABTS failed, xid=0x%x.\n",
614 io_req->xid);
615
616 out:
617 return rc;
618 }
619
620 static int qedf_eh_target_reset(struct scsi_cmnd *sc_cmd)
621 {
622 QEDF_ERR(NULL, "TARGET RESET Issued...");
623 return qedf_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
624 }
625
626 static int qedf_eh_device_reset(struct scsi_cmnd *sc_cmd)
627 {
628 QEDF_ERR(NULL, "LUN RESET Issued...\n");
629 return qedf_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
630 }
631
632 static int qedf_eh_bus_reset(struct scsi_cmnd *sc_cmd)
633 {
634 QEDF_ERR(NULL, "BUS RESET Issued...\n");
635 /*
636 * Essentially a no-op but return SUCCESS to prevent
637 * unnecessary escalation to the host reset handler.
638 */
639 return SUCCESS;
640 }
641
642 void qedf_wait_for_upload(struct qedf_ctx *qedf)
643 {
644 while (1) {
645 if (atomic_read(&qedf->num_offloads))
646 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
647 "Waiting for all uploads to complete.\n");
648 else
649 break;
650 msleep(500);
651 }
652 }
653
654 /* Performs soft reset of qedf_ctx by simulating a link down/up */
655 static void qedf_ctx_soft_reset(struct fc_lport *lport)
656 {
657 struct qedf_ctx *qedf;
658
659 if (lport->vport) {
660 QEDF_ERR(NULL, "Cannot issue host reset on NPIV port.\n");
661 return;
662 }
663
664 qedf = lport_priv(lport);
665
666 /* For host reset, essentially do a soft link up/down */
667 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
668 atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
669 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
670 0);
671 qedf_wait_for_upload(qedf);
672 atomic_set(&qedf->link_state, QEDF_LINK_UP);
673 qedf->vlan_id = 0;
674 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
675 0);
676 }
677
678 /* Reset the host by gracefully logging out and then logging back in */
679 static int qedf_eh_host_reset(struct scsi_cmnd *sc_cmd)
680 {
681 struct fc_lport *lport;
682 struct qedf_ctx *qedf;
683
684 lport = shost_priv(sc_cmd->device->host);
685 qedf = lport_priv(lport);
686
687 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN ||
688 test_bit(QEDF_UNLOADING, &qedf->flags))
689 return FAILED;
690
691 QEDF_ERR(&(qedf->dbg_ctx), "HOST RESET Issued...");
692
693 qedf_ctx_soft_reset(lport);
694
695 return SUCCESS;
696 }
697
698 static int qedf_slave_configure(struct scsi_device *sdev)
699 {
700 if (qedf_queue_depth) {
701 scsi_change_queue_depth(sdev, qedf_queue_depth);
702 }
703
704 return 0;
705 }
706
707 static struct scsi_host_template qedf_host_template = {
708 .module = THIS_MODULE,
709 .name = QEDF_MODULE_NAME,
710 .this_id = -1,
711 .cmd_per_lun = 32,
712 .use_clustering = ENABLE_CLUSTERING,
713 .max_sectors = 0xffff,
714 .queuecommand = qedf_queuecommand,
715 .shost_attrs = qedf_host_attrs,
716 .eh_abort_handler = qedf_eh_abort,
717 .eh_device_reset_handler = qedf_eh_device_reset, /* lun reset */
718 .eh_target_reset_handler = qedf_eh_target_reset, /* target reset */
719 .eh_bus_reset_handler = qedf_eh_bus_reset,
720 .eh_host_reset_handler = qedf_eh_host_reset,
721 .slave_configure = qedf_slave_configure,
722 .dma_boundary = QED_HW_DMA_BOUNDARY,
723 .sg_tablesize = QEDF_MAX_BDS_PER_CMD,
724 .can_queue = FCOE_PARAMS_NUM_TASKS,
725 .change_queue_depth = scsi_change_queue_depth,
726 };
727
728 static int qedf_get_paged_crc_eof(struct sk_buff *skb, int tlen)
729 {
730 int rc;
731
732 spin_lock(&qedf_global_lock);
733 rc = fcoe_get_paged_crc_eof(skb, tlen, &qedf_global);
734 spin_unlock(&qedf_global_lock);
735
736 return rc;
737 }
738
739 static struct qedf_rport *qedf_fcport_lookup(struct qedf_ctx *qedf, u32 port_id)
740 {
741 struct qedf_rport *fcport;
742 struct fc_rport_priv *rdata;
743
744 rcu_read_lock();
745 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
746 rdata = fcport->rdata;
747 if (rdata == NULL)
748 continue;
749 if (rdata->ids.port_id == port_id) {
750 rcu_read_unlock();
751 return fcport;
752 }
753 }
754 rcu_read_unlock();
755
756 /* Return NULL to caller to let them know fcport was not found */
757 return NULL;
758 }
759
760 /* Transmits an ELS frame over an offloaded session */
761 static int qedf_xmit_l2_frame(struct qedf_rport *fcport, struct fc_frame *fp)
762 {
763 struct fc_frame_header *fh;
764 int rc = 0;
765
766 fh = fc_frame_header_get(fp);
767 if ((fh->fh_type == FC_TYPE_ELS) &&
768 (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
769 switch (fc_frame_payload_op(fp)) {
770 case ELS_ADISC:
771 qedf_send_adisc(fcport, fp);
772 rc = 1;
773 break;
774 }
775 }
776
777 return rc;
778 }
779
780 /**
781 * qedf_xmit - qedf FCoE frame transmit function
782 *
783 */
784 static int qedf_xmit(struct fc_lport *lport, struct fc_frame *fp)
785 {
786 struct fc_lport *base_lport;
787 struct qedf_ctx *qedf;
788 struct ethhdr *eh;
789 struct fcoe_crc_eof *cp;
790 struct sk_buff *skb;
791 struct fc_frame_header *fh;
792 struct fcoe_hdr *hp;
793 u8 sof, eof;
794 u32 crc;
795 unsigned int hlen, tlen, elen;
796 int wlen;
797 struct fc_stats *stats;
798 struct fc_lport *tmp_lport;
799 struct fc_lport *vn_port = NULL;
800 struct qedf_rport *fcport;
801 int rc;
802 u16 vlan_tci = 0;
803
804 qedf = (struct qedf_ctx *)lport_priv(lport);
805
806 fh = fc_frame_header_get(fp);
807 skb = fp_skb(fp);
808
809 /* Filter out traffic to other NPIV ports on the same host */
810 if (lport->vport)
811 base_lport = shost_priv(vport_to_shost(lport->vport));
812 else
813 base_lport = lport;
814
815 /* Flag if the destination is the base port */
816 if (base_lport->port_id == ntoh24(fh->fh_d_id)) {
817 vn_port = base_lport;
818 } else {
819 /* Got through the list of vports attached to the base_lport
820 * and see if we have a match with the destination address.
821 */
822 list_for_each_entry(tmp_lport, &base_lport->vports, list) {
823 if (tmp_lport->port_id == ntoh24(fh->fh_d_id)) {
824 vn_port = tmp_lport;
825 break;
826 }
827 }
828 }
829 if (vn_port && ntoh24(fh->fh_d_id) != FC_FID_FLOGI) {
830 struct fc_rport_priv *rdata = NULL;
831
832 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
833 "Dropping FCoE frame to %06x.\n", ntoh24(fh->fh_d_id));
834 kfree_skb(skb);
835 rdata = fc_rport_lookup(lport, ntoh24(fh->fh_d_id));
836 if (rdata)
837 rdata->retries = lport->max_rport_retry_count;
838 return -EINVAL;
839 }
840 /* End NPIV filtering */
841
842 if (!qedf->ctlr.sel_fcf) {
843 kfree_skb(skb);
844 return 0;
845 }
846
847 if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
848 QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
849 kfree_skb(skb);
850 return 0;
851 }
852
853 if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
854 QEDF_WARN(&(qedf->dbg_ctx), "qedf link down\n");
855 kfree_skb(skb);
856 return 0;
857 }
858
859 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
860 if (fcoe_ctlr_els_send(&qedf->ctlr, lport, skb))
861 return 0;
862 }
863
864 /* Check to see if this needs to be sent on an offloaded session */
865 fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
866
867 if (fcport && test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
868 rc = qedf_xmit_l2_frame(fcport, fp);
869 /*
870 * If the frame was successfully sent over the middle path
871 * then do not try to also send it over the LL2 path
872 */
873 if (rc)
874 return 0;
875 }
876
877 sof = fr_sof(fp);
878 eof = fr_eof(fp);
879
880 elen = sizeof(struct ethhdr);
881 hlen = sizeof(struct fcoe_hdr);
882 tlen = sizeof(struct fcoe_crc_eof);
883 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
884
885 skb->ip_summed = CHECKSUM_NONE;
886 crc = fcoe_fc_crc(fp);
887
888 /* copy port crc and eof to the skb buff */
889 if (skb_is_nonlinear(skb)) {
890 skb_frag_t *frag;
891
892 if (qedf_get_paged_crc_eof(skb, tlen)) {
893 kfree_skb(skb);
894 return -ENOMEM;
895 }
896 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
897 cp = kmap_atomic(skb_frag_page(frag)) + frag->page_offset;
898 } else {
899 cp = skb_put(skb, tlen);
900 }
901
902 memset(cp, 0, sizeof(*cp));
903 cp->fcoe_eof = eof;
904 cp->fcoe_crc32 = cpu_to_le32(~crc);
905 if (skb_is_nonlinear(skb)) {
906 kunmap_atomic(cp);
907 cp = NULL;
908 }
909
910
911 /* adjust skb network/transport offsets to match mac/fcoe/port */
912 skb_push(skb, elen + hlen);
913 skb_reset_mac_header(skb);
914 skb_reset_network_header(skb);
915 skb->mac_len = elen;
916 skb->protocol = htons(ETH_P_FCOE);
917
918 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), qedf->vlan_id);
919
920 /* fill up mac and fcoe headers */
921 eh = eth_hdr(skb);
922 eh->h_proto = htons(ETH_P_FCOE);
923 if (qedf->ctlr.map_dest)
924 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
925 else
926 /* insert GW address */
927 ether_addr_copy(eh->h_dest, qedf->ctlr.dest_addr);
928
929 /* Set the source MAC address */
930 fc_fcoe_set_mac(eh->h_source, fh->fh_s_id);
931
932 hp = (struct fcoe_hdr *)(eh + 1);
933 memset(hp, 0, sizeof(*hp));
934 if (FC_FCOE_VER)
935 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
936 hp->fcoe_sof = sof;
937
938 /*update tx stats */
939 stats = per_cpu_ptr(lport->stats, get_cpu());
940 stats->TxFrames++;
941 stats->TxWords += wlen;
942 put_cpu();
943
944 /* Get VLAN ID from skb for printing purposes */
945 __vlan_hwaccel_get_tag(skb, &vlan_tci);
946
947 /* send down to lld */
948 fr_dev(fp) = lport;
949 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame send: "
950 "src=%06x dest=%06x r_ctl=%x type=%x vlan=%04x.\n",
951 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, fh->fh_type,
952 vlan_tci);
953 if (qedf_dump_frames)
954 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
955 1, skb->data, skb->len, false);
956 qed_ops->ll2->start_xmit(qedf->cdev, skb);
957
958 return 0;
959 }
960
961 static int qedf_alloc_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
962 {
963 int rval = 0;
964 u32 *pbl;
965 dma_addr_t page;
966 int num_pages;
967
968 /* Calculate appropriate queue and PBL sizes */
969 fcport->sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
970 fcport->sq_mem_size = ALIGN(fcport->sq_mem_size, QEDF_PAGE_SIZE);
971 fcport->sq_pbl_size = (fcport->sq_mem_size / QEDF_PAGE_SIZE) *
972 sizeof(void *);
973 fcport->sq_pbl_size = fcport->sq_pbl_size + QEDF_PAGE_SIZE;
974
975 fcport->sq = dma_zalloc_coherent(&qedf->pdev->dev,
976 fcport->sq_mem_size, &fcport->sq_dma, GFP_KERNEL);
977 if (!fcport->sq) {
978 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue.\n");
979 rval = 1;
980 goto out;
981 }
982
983 fcport->sq_pbl = dma_zalloc_coherent(&qedf->pdev->dev,
984 fcport->sq_pbl_size, &fcport->sq_pbl_dma, GFP_KERNEL);
985 if (!fcport->sq_pbl) {
986 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue PBL.\n");
987 rval = 1;
988 goto out_free_sq;
989 }
990
991 /* Create PBL */
992 num_pages = fcport->sq_mem_size / QEDF_PAGE_SIZE;
993 page = fcport->sq_dma;
994 pbl = (u32 *)fcport->sq_pbl;
995
996 while (num_pages--) {
997 *pbl = U64_LO(page);
998 pbl++;
999 *pbl = U64_HI(page);
1000 pbl++;
1001 page += QEDF_PAGE_SIZE;
1002 }
1003
1004 return rval;
1005
1006 out_free_sq:
1007 dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size, fcport->sq,
1008 fcport->sq_dma);
1009 out:
1010 return rval;
1011 }
1012
1013 static void qedf_free_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
1014 {
1015 if (fcport->sq_pbl)
1016 dma_free_coherent(&qedf->pdev->dev, fcport->sq_pbl_size,
1017 fcport->sq_pbl, fcport->sq_pbl_dma);
1018 if (fcport->sq)
1019 dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
1020 fcport->sq, fcport->sq_dma);
1021 }
1022
1023 static int qedf_offload_connection(struct qedf_ctx *qedf,
1024 struct qedf_rport *fcport)
1025 {
1026 struct qed_fcoe_params_offload conn_info;
1027 u32 port_id;
1028 u8 lport_src_id[3];
1029 int rval;
1030 uint16_t total_sqe = (fcport->sq_mem_size / sizeof(struct fcoe_wqe));
1031
1032 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offloading connection "
1033 "portid=%06x.\n", fcport->rdata->ids.port_id);
1034 rval = qed_ops->acquire_conn(qedf->cdev, &fcport->handle,
1035 &fcport->fw_cid, &fcport->p_doorbell);
1036 if (rval) {
1037 QEDF_WARN(&(qedf->dbg_ctx), "Could not acquire connection "
1038 "for portid=%06x.\n", fcport->rdata->ids.port_id);
1039 rval = 1; /* For some reason qed returns 0 on failure here */
1040 goto out;
1041 }
1042
1043 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "portid=%06x "
1044 "fw_cid=%08x handle=%d.\n", fcport->rdata->ids.port_id,
1045 fcport->fw_cid, fcport->handle);
1046
1047 memset(&conn_info, 0, sizeof(struct qed_fcoe_params_offload));
1048
1049 /* Fill in the offload connection info */
1050 conn_info.sq_pbl_addr = fcport->sq_pbl_dma;
1051
1052 conn_info.sq_curr_page_addr = (dma_addr_t)(*(u64 *)fcport->sq_pbl);
1053 conn_info.sq_next_page_addr =
1054 (dma_addr_t)(*(u64 *)(fcport->sq_pbl + 8));
1055
1056 /* Need to use our FCoE MAC for the offload session */
1057 port_id = fc_host_port_id(qedf->lport->host);
1058 lport_src_id[2] = (port_id & 0x000000FF);
1059 lport_src_id[1] = (port_id & 0x0000FF00) >> 8;
1060 lport_src_id[0] = (port_id & 0x00FF0000) >> 16;
1061 fc_fcoe_set_mac(conn_info.src_mac, lport_src_id);
1062
1063 ether_addr_copy(conn_info.dst_mac, qedf->ctlr.dest_addr);
1064
1065 conn_info.tx_max_fc_pay_len = fcport->rdata->maxframe_size;
1066 conn_info.e_d_tov_timer_val = qedf->lport->e_d_tov / 20;
1067 conn_info.rec_tov_timer_val = 3; /* I think this is what E3 was */
1068 conn_info.rx_max_fc_pay_len = fcport->rdata->maxframe_size;
1069
1070 /* Set VLAN data */
1071 conn_info.vlan_tag = qedf->vlan_id <<
1072 FCOE_CONN_OFFLOAD_RAMROD_DATA_VLAN_ID_SHIFT;
1073 conn_info.vlan_tag |=
1074 qedf_default_prio << FCOE_CONN_OFFLOAD_RAMROD_DATA_PRIORITY_SHIFT;
1075 conn_info.flags |= (FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_MASK <<
1076 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_SHIFT);
1077
1078 /* Set host port source id */
1079 port_id = fc_host_port_id(qedf->lport->host);
1080 fcport->sid = port_id;
1081 conn_info.s_id.addr_hi = (port_id & 0x000000FF);
1082 conn_info.s_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1083 conn_info.s_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1084
1085 conn_info.max_conc_seqs_c3 = fcport->rdata->max_seq;
1086
1087 /* Set remote port destination id */
1088 port_id = fcport->rdata->rport->port_id;
1089 conn_info.d_id.addr_hi = (port_id & 0x000000FF);
1090 conn_info.d_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1091 conn_info.d_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1092
1093 conn_info.def_q_idx = 0; /* Default index for send queue? */
1094
1095 /* Set FC-TAPE specific flags if needed */
1096 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
1097 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN,
1098 "Enable CONF, REC for portid=%06x.\n",
1099 fcport->rdata->ids.port_id);
1100 conn_info.flags |= 1 <<
1101 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_CONF_REQ_SHIFT;
1102 conn_info.flags |=
1103 ((fcport->rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
1104 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_REC_VALID_SHIFT;
1105 }
1106
1107 rval = qed_ops->offload_conn(qedf->cdev, fcport->handle, &conn_info);
1108 if (rval) {
1109 QEDF_WARN(&(qedf->dbg_ctx), "Could not offload connection "
1110 "for portid=%06x.\n", fcport->rdata->ids.port_id);
1111 goto out_free_conn;
1112 } else
1113 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offload "
1114 "succeeded portid=%06x total_sqe=%d.\n",
1115 fcport->rdata->ids.port_id, total_sqe);
1116
1117 spin_lock_init(&fcport->rport_lock);
1118 atomic_set(&fcport->free_sqes, total_sqe);
1119 return 0;
1120 out_free_conn:
1121 qed_ops->release_conn(qedf->cdev, fcport->handle);
1122 out:
1123 return rval;
1124 }
1125
1126 #define QEDF_TERM_BUFF_SIZE 10
1127 static void qedf_upload_connection(struct qedf_ctx *qedf,
1128 struct qedf_rport *fcport)
1129 {
1130 void *term_params;
1131 dma_addr_t term_params_dma;
1132
1133 /* Term params needs to be a DMA coherent buffer as qed shared the
1134 * physical DMA address with the firmware. The buffer may be used in
1135 * the receive path so we may eventually have to move this.
1136 */
1137 term_params = dma_alloc_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE,
1138 &term_params_dma, GFP_KERNEL);
1139
1140 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Uploading connection "
1141 "port_id=%06x.\n", fcport->rdata->ids.port_id);
1142
1143 qed_ops->destroy_conn(qedf->cdev, fcport->handle, term_params_dma);
1144 qed_ops->release_conn(qedf->cdev, fcport->handle);
1145
1146 dma_free_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE, term_params,
1147 term_params_dma);
1148 }
1149
1150 static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
1151 struct qedf_rport *fcport)
1152 {
1153 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Cleaning up portid=%06x.\n",
1154 fcport->rdata->ids.port_id);
1155
1156 /* Flush any remaining i/o's before we upload the connection */
1157 qedf_flush_active_ios(fcport, -1);
1158
1159 if (test_and_clear_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))
1160 qedf_upload_connection(qedf, fcport);
1161 qedf_free_sq(qedf, fcport);
1162 fcport->rdata = NULL;
1163 fcport->qedf = NULL;
1164 }
1165
1166 /**
1167 * This event_callback is called after successful completion of libfc
1168 * initiated target login. qedf can proceed with initiating the session
1169 * establishment.
1170 */
1171 static void qedf_rport_event_handler(struct fc_lport *lport,
1172 struct fc_rport_priv *rdata,
1173 enum fc_rport_event event)
1174 {
1175 struct qedf_ctx *qedf = lport_priv(lport);
1176 struct fc_rport *rport = rdata->rport;
1177 struct fc_rport_libfc_priv *rp;
1178 struct qedf_rport *fcport;
1179 u32 port_id;
1180 int rval;
1181 unsigned long flags;
1182
1183 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "event = %d, "
1184 "port_id = 0x%x\n", event, rdata->ids.port_id);
1185
1186 switch (event) {
1187 case RPORT_EV_READY:
1188 if (!rport) {
1189 QEDF_WARN(&(qedf->dbg_ctx), "rport is NULL.\n");
1190 break;
1191 }
1192
1193 rp = rport->dd_data;
1194 fcport = (struct qedf_rport *)&rp[1];
1195 fcport->qedf = qedf;
1196
1197 if (atomic_read(&qedf->num_offloads) >= QEDF_MAX_SESSIONS) {
1198 QEDF_ERR(&(qedf->dbg_ctx), "Not offloading "
1199 "portid=0x%x as max number of offloaded sessions "
1200 "reached.\n", rdata->ids.port_id);
1201 return;
1202 }
1203
1204 /*
1205 * Don't try to offload the session again. Can happen when we
1206 * get an ADISC
1207 */
1208 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1209 QEDF_WARN(&(qedf->dbg_ctx), "Session already "
1210 "offloaded, portid=0x%x.\n",
1211 rdata->ids.port_id);
1212 return;
1213 }
1214
1215 if (rport->port_id == FC_FID_DIR_SERV) {
1216 /*
1217 * qedf_rport structure doesn't exist for
1218 * directory server.
1219 * We should not come here, as lport will
1220 * take care of fabric login
1221 */
1222 QEDF_WARN(&(qedf->dbg_ctx), "rport struct does not "
1223 "exist for dir server port_id=%x\n",
1224 rdata->ids.port_id);
1225 break;
1226 }
1227
1228 if (rdata->spp_type != FC_TYPE_FCP) {
1229 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1230 "Not offloading since spp type isn't FCP\n");
1231 break;
1232 }
1233 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
1234 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1235 "Not FCP target so not offloading\n");
1236 break;
1237 }
1238
1239 fcport->rdata = rdata;
1240 fcport->rport = rport;
1241
1242 rval = qedf_alloc_sq(qedf, fcport);
1243 if (rval) {
1244 qedf_cleanup_fcport(qedf, fcport);
1245 break;
1246 }
1247
1248 /* Set device type */
1249 if (rdata->flags & FC_RP_FLAGS_RETRY &&
1250 rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
1251 !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
1252 fcport->dev_type = QEDF_RPORT_TYPE_TAPE;
1253 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1254 "portid=%06x is a TAPE device.\n",
1255 rdata->ids.port_id);
1256 } else {
1257 fcport->dev_type = QEDF_RPORT_TYPE_DISK;
1258 }
1259
1260 rval = qedf_offload_connection(qedf, fcport);
1261 if (rval) {
1262 qedf_cleanup_fcport(qedf, fcport);
1263 break;
1264 }
1265
1266 /* Add fcport to list of qedf_ctx list of offloaded ports */
1267 spin_lock_irqsave(&qedf->hba_lock, flags);
1268 list_add_rcu(&fcport->peers, &qedf->fcports);
1269 spin_unlock_irqrestore(&qedf->hba_lock, flags);
1270
1271 /*
1272 * Set the session ready bit to let everyone know that this
1273 * connection is ready for I/O
1274 */
1275 set_bit(QEDF_RPORT_SESSION_READY, &fcport->flags);
1276 atomic_inc(&qedf->num_offloads);
1277
1278 break;
1279 case RPORT_EV_LOGO:
1280 case RPORT_EV_FAILED:
1281 case RPORT_EV_STOP:
1282 port_id = rdata->ids.port_id;
1283 if (port_id == FC_FID_DIR_SERV)
1284 break;
1285
1286 if (!rport) {
1287 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1288 "port_id=%x - rport notcreated Yet!!\n", port_id);
1289 break;
1290 }
1291 rp = rport->dd_data;
1292 /*
1293 * Perform session upload. Note that rdata->peers is already
1294 * removed from disc->rports list before we get this event.
1295 */
1296 fcport = (struct qedf_rport *)&rp[1];
1297
1298 /* Only free this fcport if it is offloaded already */
1299 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1300 set_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags);
1301 qedf_cleanup_fcport(qedf, fcport);
1302
1303 /*
1304 * Remove fcport to list of qedf_ctx list of offloaded
1305 * ports
1306 */
1307 spin_lock_irqsave(&qedf->hba_lock, flags);
1308 list_del_rcu(&fcport->peers);
1309 spin_unlock_irqrestore(&qedf->hba_lock, flags);
1310
1311 clear_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1312 &fcport->flags);
1313 atomic_dec(&qedf->num_offloads);
1314 }
1315
1316 break;
1317
1318 case RPORT_EV_NONE:
1319 break;
1320 }
1321 }
1322
1323 static void qedf_abort_io(struct fc_lport *lport)
1324 {
1325 /* NO-OP but need to fill in the template */
1326 }
1327
1328 static void qedf_fcp_cleanup(struct fc_lport *lport)
1329 {
1330 /*
1331 * NO-OP but need to fill in template to prevent a NULL
1332 * function pointer dereference during link down. I/Os
1333 * will be flushed when port is uploaded.
1334 */
1335 }
1336
1337 static struct libfc_function_template qedf_lport_template = {
1338 .frame_send = qedf_xmit,
1339 .fcp_abort_io = qedf_abort_io,
1340 .fcp_cleanup = qedf_fcp_cleanup,
1341 .rport_event_callback = qedf_rport_event_handler,
1342 .elsct_send = qedf_elsct_send,
1343 };
1344
1345 static void qedf_fcoe_ctlr_setup(struct qedf_ctx *qedf)
1346 {
1347 fcoe_ctlr_init(&qedf->ctlr, FIP_ST_AUTO);
1348
1349 qedf->ctlr.send = qedf_fip_send;
1350 qedf->ctlr.update_mac = qedf_update_src_mac;
1351 qedf->ctlr.get_src_addr = qedf_get_src_mac;
1352 ether_addr_copy(qedf->ctlr.ctl_src_addr, qedf->mac);
1353 }
1354
1355 static void qedf_setup_fdmi(struct qedf_ctx *qedf)
1356 {
1357 struct fc_lport *lport = qedf->lport;
1358 struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
1359 u8 buf[8];
1360 int i, pos;
1361
1362 /*
1363 * fdmi_enabled needs to be set for libfc to execute FDMI registration.
1364 */
1365 lport->fdmi_enabled = 1;
1366
1367 /*
1368 * Setup the necessary fc_host attributes to that will be used to fill
1369 * in the FDMI information.
1370 */
1371
1372 /* Get the PCI-e Device Serial Number Capability */
1373 pos = pci_find_ext_capability(qedf->pdev, PCI_EXT_CAP_ID_DSN);
1374 if (pos) {
1375 pos += 4;
1376 for (i = 0; i < 8; i++)
1377 pci_read_config_byte(qedf->pdev, pos + i, &buf[i]);
1378
1379 snprintf(fc_host->serial_number,
1380 sizeof(fc_host->serial_number),
1381 "%02X%02X%02X%02X%02X%02X%02X%02X",
1382 buf[7], buf[6], buf[5], buf[4],
1383 buf[3], buf[2], buf[1], buf[0]);
1384 } else
1385 snprintf(fc_host->serial_number,
1386 sizeof(fc_host->serial_number), "Unknown");
1387
1388 snprintf(fc_host->manufacturer,
1389 sizeof(fc_host->manufacturer), "%s", "Cavium Inc.");
1390
1391 snprintf(fc_host->model, sizeof(fc_host->model), "%s", "QL41000");
1392
1393 snprintf(fc_host->model_description, sizeof(fc_host->model_description),
1394 "%s", "QLogic FastLinQ QL41000 Series 10/25/40/50GGbE Controller"
1395 "(FCoE)");
1396
1397 snprintf(fc_host->hardware_version, sizeof(fc_host->hardware_version),
1398 "Rev %d", qedf->pdev->revision);
1399
1400 snprintf(fc_host->driver_version, sizeof(fc_host->driver_version),
1401 "%s", QEDF_VERSION);
1402
1403 snprintf(fc_host->firmware_version, sizeof(fc_host->firmware_version),
1404 "%d.%d.%d.%d", FW_MAJOR_VERSION, FW_MINOR_VERSION,
1405 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
1406 }
1407
1408 static int qedf_lport_setup(struct qedf_ctx *qedf)
1409 {
1410 struct fc_lport *lport = qedf->lport;
1411
1412 lport->link_up = 0;
1413 lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1414 lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1415 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1416 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1417 lport->boot_time = jiffies;
1418 lport->e_d_tov = 2 * 1000;
1419 lport->r_a_tov = 10 * 1000;
1420
1421 /* Set NPIV support */
1422 lport->does_npiv = 1;
1423 fc_host_max_npiv_vports(lport->host) = QEDF_MAX_NPIV;
1424
1425 fc_set_wwnn(lport, qedf->wwnn);
1426 fc_set_wwpn(lport, qedf->wwpn);
1427
1428 fcoe_libfc_config(lport, &qedf->ctlr, &qedf_lport_template, 0);
1429
1430 /* Allocate the exchange manager */
1431 fc_exch_mgr_alloc(lport, FC_CLASS_3, qedf->max_scsi_xid + 1,
1432 qedf->max_els_xid, NULL);
1433
1434 if (fc_lport_init_stats(lport))
1435 return -ENOMEM;
1436
1437 /* Finish lport config */
1438 fc_lport_config(lport);
1439
1440 /* Set max frame size */
1441 fc_set_mfs(lport, QEDF_MFS);
1442 fc_host_maxframe_size(lport->host) = lport->mfs;
1443
1444 /* Set default dev_loss_tmo based on module parameter */
1445 fc_host_dev_loss_tmo(lport->host) = qedf_dev_loss_tmo;
1446
1447 /* Set symbolic node name */
1448 snprintf(fc_host_symbolic_name(lport->host), 256,
1449 "QLogic %s v%s", QEDF_MODULE_NAME, QEDF_VERSION);
1450
1451 qedf_setup_fdmi(qedf);
1452
1453 return 0;
1454 }
1455
1456 /*
1457 * NPIV functions
1458 */
1459
1460 static int qedf_vport_libfc_config(struct fc_vport *vport,
1461 struct fc_lport *lport)
1462 {
1463 lport->link_up = 0;
1464 lport->qfull = 0;
1465 lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1466 lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1467 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1468 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1469 lport->boot_time = jiffies;
1470 lport->e_d_tov = 2 * 1000;
1471 lport->r_a_tov = 10 * 1000;
1472 lport->does_npiv = 1; /* Temporary until we add NPIV support */
1473
1474 /* Allocate stats for vport */
1475 if (fc_lport_init_stats(lport))
1476 return -ENOMEM;
1477
1478 /* Finish lport config */
1479 fc_lport_config(lport);
1480
1481 /* offload related configuration */
1482 lport->crc_offload = 0;
1483 lport->seq_offload = 0;
1484 lport->lro_enabled = 0;
1485 lport->lro_xid = 0;
1486 lport->lso_max = 0;
1487
1488 return 0;
1489 }
1490
1491 static int qedf_vport_create(struct fc_vport *vport, bool disabled)
1492 {
1493 struct Scsi_Host *shost = vport_to_shost(vport);
1494 struct fc_lport *n_port = shost_priv(shost);
1495 struct fc_lport *vn_port;
1496 struct qedf_ctx *base_qedf = lport_priv(n_port);
1497 struct qedf_ctx *vport_qedf;
1498
1499 char buf[32];
1500 int rc = 0;
1501
1502 rc = fcoe_validate_vport_create(vport);
1503 if (rc) {
1504 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1505 QEDF_WARN(&(base_qedf->dbg_ctx), "Failed to create vport, "
1506 "WWPN (0x%s) already exists.\n", buf);
1507 goto err1;
1508 }
1509
1510 if (atomic_read(&base_qedf->link_state) != QEDF_LINK_UP) {
1511 QEDF_WARN(&(base_qedf->dbg_ctx), "Cannot create vport "
1512 "because link is not up.\n");
1513 rc = -EIO;
1514 goto err1;
1515 }
1516
1517 vn_port = libfc_vport_create(vport, sizeof(struct qedf_ctx));
1518 if (!vn_port) {
1519 QEDF_WARN(&(base_qedf->dbg_ctx), "Could not create lport "
1520 "for vport.\n");
1521 rc = -ENOMEM;
1522 goto err1;
1523 }
1524
1525 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1526 QEDF_ERR(&(base_qedf->dbg_ctx), "Creating NPIV port, WWPN=%s.\n",
1527 buf);
1528
1529 /* Copy some fields from base_qedf */
1530 vport_qedf = lport_priv(vn_port);
1531 memcpy(vport_qedf, base_qedf, sizeof(struct qedf_ctx));
1532
1533 /* Set qedf data specific to this vport */
1534 vport_qedf->lport = vn_port;
1535 /* Use same hba_lock as base_qedf */
1536 vport_qedf->hba_lock = base_qedf->hba_lock;
1537 vport_qedf->pdev = base_qedf->pdev;
1538 vport_qedf->cmd_mgr = base_qedf->cmd_mgr;
1539 init_completion(&vport_qedf->flogi_compl);
1540 INIT_LIST_HEAD(&vport_qedf->fcports);
1541
1542 rc = qedf_vport_libfc_config(vport, vn_port);
1543 if (rc) {
1544 QEDF_ERR(&(base_qedf->dbg_ctx), "Could not allocate memory "
1545 "for lport stats.\n");
1546 goto err2;
1547 }
1548
1549 fc_set_wwnn(vn_port, vport->node_name);
1550 fc_set_wwpn(vn_port, vport->port_name);
1551 vport_qedf->wwnn = vn_port->wwnn;
1552 vport_qedf->wwpn = vn_port->wwpn;
1553
1554 vn_port->host->transportt = qedf_fc_vport_transport_template;
1555 vn_port->host->can_queue = QEDF_MAX_ELS_XID;
1556 vn_port->host->max_lun = qedf_max_lun;
1557 vn_port->host->sg_tablesize = QEDF_MAX_BDS_PER_CMD;
1558 vn_port->host->max_cmd_len = QEDF_MAX_CDB_LEN;
1559
1560 rc = scsi_add_host(vn_port->host, &vport->dev);
1561 if (rc) {
1562 QEDF_WARN(&(base_qedf->dbg_ctx), "Error adding Scsi_Host.\n");
1563 goto err2;
1564 }
1565
1566 /* Set default dev_loss_tmo based on module parameter */
1567 fc_host_dev_loss_tmo(vn_port->host) = qedf_dev_loss_tmo;
1568
1569 /* Init libfc stuffs */
1570 memcpy(&vn_port->tt, &qedf_lport_template,
1571 sizeof(qedf_lport_template));
1572 fc_exch_init(vn_port);
1573 fc_elsct_init(vn_port);
1574 fc_lport_init(vn_port);
1575 fc_disc_init(vn_port);
1576 fc_disc_config(vn_port, vn_port);
1577
1578
1579 /* Allocate the exchange manager */
1580 shost = vport_to_shost(vport);
1581 n_port = shost_priv(shost);
1582 fc_exch_mgr_list_clone(n_port, vn_port);
1583
1584 /* Set max frame size */
1585 fc_set_mfs(vn_port, QEDF_MFS);
1586
1587 fc_host_port_type(vn_port->host) = FC_PORTTYPE_UNKNOWN;
1588
1589 if (disabled) {
1590 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1591 } else {
1592 vn_port->boot_time = jiffies;
1593 fc_fabric_login(vn_port);
1594 fc_vport_setlink(vn_port);
1595 }
1596
1597 QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_NPIV, "vn_port=%p.\n",
1598 vn_port);
1599
1600 /* Set up debug context for vport */
1601 vport_qedf->dbg_ctx.host_no = vn_port->host->host_no;
1602 vport_qedf->dbg_ctx.pdev = base_qedf->pdev;
1603
1604 err2:
1605 scsi_host_put(vn_port->host);
1606 err1:
1607 return rc;
1608 }
1609
1610 static int qedf_vport_destroy(struct fc_vport *vport)
1611 {
1612 struct Scsi_Host *shost = vport_to_shost(vport);
1613 struct fc_lport *n_port = shost_priv(shost);
1614 struct fc_lport *vn_port = vport->dd_data;
1615
1616 mutex_lock(&n_port->lp_mutex);
1617 list_del(&vn_port->list);
1618 mutex_unlock(&n_port->lp_mutex);
1619
1620 fc_fabric_logoff(vn_port);
1621 fc_lport_destroy(vn_port);
1622
1623 /* Detach from scsi-ml */
1624 fc_remove_host(vn_port->host);
1625 scsi_remove_host(vn_port->host);
1626
1627 /*
1628 * Only try to release the exchange manager if the vn_port
1629 * configuration is complete.
1630 */
1631 if (vn_port->state == LPORT_ST_READY)
1632 fc_exch_mgr_free(vn_port);
1633
1634 /* Free memory used by statistical counters */
1635 fc_lport_free_stats(vn_port);
1636
1637 /* Release Scsi_Host */
1638 if (vn_port->host)
1639 scsi_host_put(vn_port->host);
1640
1641 return 0;
1642 }
1643
1644 static int qedf_vport_disable(struct fc_vport *vport, bool disable)
1645 {
1646 struct fc_lport *lport = vport->dd_data;
1647
1648 if (disable) {
1649 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1650 fc_fabric_logoff(lport);
1651 } else {
1652 lport->boot_time = jiffies;
1653 fc_fabric_login(lport);
1654 fc_vport_setlink(lport);
1655 }
1656 return 0;
1657 }
1658
1659 /*
1660 * During removal we need to wait for all the vports associated with a port
1661 * to be destroyed so we avoid a race condition where libfc is still trying
1662 * to reap vports while the driver remove function has already reaped the
1663 * driver contexts associated with the physical port.
1664 */
1665 static void qedf_wait_for_vport_destroy(struct qedf_ctx *qedf)
1666 {
1667 struct fc_host_attrs *fc_host = shost_to_fc_host(qedf->lport->host);
1668
1669 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
1670 "Entered.\n");
1671 while (fc_host->npiv_vports_inuse > 0) {
1672 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
1673 "Waiting for all vports to be reaped.\n");
1674 msleep(1000);
1675 }
1676 }
1677
1678 /**
1679 * qedf_fcoe_reset - Resets the fcoe
1680 *
1681 * @shost: shost the reset is from
1682 *
1683 * Returns: always 0
1684 */
1685 static int qedf_fcoe_reset(struct Scsi_Host *shost)
1686 {
1687 struct fc_lport *lport = shost_priv(shost);
1688
1689 qedf_ctx_soft_reset(lport);
1690 return 0;
1691 }
1692
1693 static struct fc_host_statistics *qedf_fc_get_host_stats(struct Scsi_Host
1694 *shost)
1695 {
1696 struct fc_host_statistics *qedf_stats;
1697 struct fc_lport *lport = shost_priv(shost);
1698 struct qedf_ctx *qedf = lport_priv(lport);
1699 struct qed_fcoe_stats *fw_fcoe_stats;
1700
1701 qedf_stats = fc_get_host_stats(shost);
1702
1703 /* We don't collect offload stats for specific NPIV ports */
1704 if (lport->vport)
1705 goto out;
1706
1707 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
1708 if (!fw_fcoe_stats) {
1709 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
1710 "fw_fcoe_stats.\n");
1711 goto out;
1712 }
1713
1714 /* Query firmware for offload stats */
1715 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
1716
1717 /*
1718 * The expectation is that we add our offload stats to the stats
1719 * being maintained by libfc each time the fc_get_host_status callback
1720 * is invoked. The additions are not carried over for each call to
1721 * the fc_get_host_stats callback.
1722 */
1723 qedf_stats->tx_frames += fw_fcoe_stats->fcoe_tx_data_pkt_cnt +
1724 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt +
1725 fw_fcoe_stats->fcoe_tx_other_pkt_cnt;
1726 qedf_stats->rx_frames += fw_fcoe_stats->fcoe_rx_data_pkt_cnt +
1727 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt +
1728 fw_fcoe_stats->fcoe_rx_other_pkt_cnt;
1729 qedf_stats->fcp_input_megabytes +=
1730 do_div(fw_fcoe_stats->fcoe_rx_byte_cnt, 1000000);
1731 qedf_stats->fcp_output_megabytes +=
1732 do_div(fw_fcoe_stats->fcoe_tx_byte_cnt, 1000000);
1733 qedf_stats->rx_words += fw_fcoe_stats->fcoe_rx_byte_cnt / 4;
1734 qedf_stats->tx_words += fw_fcoe_stats->fcoe_tx_byte_cnt / 4;
1735 qedf_stats->invalid_crc_count +=
1736 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt;
1737 qedf_stats->dumped_frames =
1738 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
1739 qedf_stats->error_frames +=
1740 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
1741 qedf_stats->fcp_input_requests += qedf->input_requests;
1742 qedf_stats->fcp_output_requests += qedf->output_requests;
1743 qedf_stats->fcp_control_requests += qedf->control_requests;
1744 qedf_stats->fcp_packet_aborts += qedf->packet_aborts;
1745 qedf_stats->fcp_frame_alloc_failures += qedf->alloc_failures;
1746
1747 kfree(fw_fcoe_stats);
1748 out:
1749 return qedf_stats;
1750 }
1751
1752 static struct fc_function_template qedf_fc_transport_fn = {
1753 .show_host_node_name = 1,
1754 .show_host_port_name = 1,
1755 .show_host_supported_classes = 1,
1756 .show_host_supported_fc4s = 1,
1757 .show_host_active_fc4s = 1,
1758 .show_host_maxframe_size = 1,
1759
1760 .show_host_port_id = 1,
1761 .show_host_supported_speeds = 1,
1762 .get_host_speed = fc_get_host_speed,
1763 .show_host_speed = 1,
1764 .show_host_port_type = 1,
1765 .get_host_port_state = fc_get_host_port_state,
1766 .show_host_port_state = 1,
1767 .show_host_symbolic_name = 1,
1768
1769 /*
1770 * Tell FC transport to allocate enough space to store the backpointer
1771 * for the associate qedf_rport struct.
1772 */
1773 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
1774 sizeof(struct qedf_rport)),
1775 .show_rport_maxframe_size = 1,
1776 .show_rport_supported_classes = 1,
1777 .show_host_fabric_name = 1,
1778 .show_starget_node_name = 1,
1779 .show_starget_port_name = 1,
1780 .show_starget_port_id = 1,
1781 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
1782 .show_rport_dev_loss_tmo = 1,
1783 .get_fc_host_stats = qedf_fc_get_host_stats,
1784 .issue_fc_host_lip = qedf_fcoe_reset,
1785 .vport_create = qedf_vport_create,
1786 .vport_delete = qedf_vport_destroy,
1787 .vport_disable = qedf_vport_disable,
1788 .bsg_request = fc_lport_bsg_request,
1789 };
1790
1791 static struct fc_function_template qedf_fc_vport_transport_fn = {
1792 .show_host_node_name = 1,
1793 .show_host_port_name = 1,
1794 .show_host_supported_classes = 1,
1795 .show_host_supported_fc4s = 1,
1796 .show_host_active_fc4s = 1,
1797 .show_host_maxframe_size = 1,
1798 .show_host_port_id = 1,
1799 .show_host_supported_speeds = 1,
1800 .get_host_speed = fc_get_host_speed,
1801 .show_host_speed = 1,
1802 .show_host_port_type = 1,
1803 .get_host_port_state = fc_get_host_port_state,
1804 .show_host_port_state = 1,
1805 .show_host_symbolic_name = 1,
1806 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
1807 sizeof(struct qedf_rport)),
1808 .show_rport_maxframe_size = 1,
1809 .show_rport_supported_classes = 1,
1810 .show_host_fabric_name = 1,
1811 .show_starget_node_name = 1,
1812 .show_starget_port_name = 1,
1813 .show_starget_port_id = 1,
1814 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
1815 .show_rport_dev_loss_tmo = 1,
1816 .get_fc_host_stats = fc_get_host_stats,
1817 .issue_fc_host_lip = qedf_fcoe_reset,
1818 .bsg_request = fc_lport_bsg_request,
1819 };
1820
1821 static bool qedf_fp_has_work(struct qedf_fastpath *fp)
1822 {
1823 struct qedf_ctx *qedf = fp->qedf;
1824 struct global_queue *que;
1825 struct qed_sb_info *sb_info = fp->sb_info;
1826 struct status_block *sb = sb_info->sb_virt;
1827 u16 prod_idx;
1828
1829 /* Get the pointer to the global CQ this completion is on */
1830 que = qedf->global_queues[fp->sb_id];
1831
1832 /* Be sure all responses have been written to PI */
1833 rmb();
1834
1835 /* Get the current firmware producer index */
1836 prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
1837
1838 return (que->cq_prod_idx != prod_idx);
1839 }
1840
1841 /*
1842 * Interrupt handler code.
1843 */
1844
1845 /* Process completion queue and copy CQE contents for deferred processesing
1846 *
1847 * Return true if we should wake the I/O thread, false if not.
1848 */
1849 static bool qedf_process_completions(struct qedf_fastpath *fp)
1850 {
1851 struct qedf_ctx *qedf = fp->qedf;
1852 struct qed_sb_info *sb_info = fp->sb_info;
1853 struct status_block *sb = sb_info->sb_virt;
1854 struct global_queue *que;
1855 u16 prod_idx;
1856 struct fcoe_cqe *cqe;
1857 struct qedf_io_work *io_work;
1858 int num_handled = 0;
1859 unsigned int cpu;
1860 struct qedf_ioreq *io_req = NULL;
1861 u16 xid;
1862 u16 new_cqes;
1863 u32 comp_type;
1864
1865 /* Get the current firmware producer index */
1866 prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
1867
1868 /* Get the pointer to the global CQ this completion is on */
1869 que = qedf->global_queues[fp->sb_id];
1870
1871 /* Calculate the amount of new elements since last processing */
1872 new_cqes = (prod_idx >= que->cq_prod_idx) ?
1873 (prod_idx - que->cq_prod_idx) :
1874 0x10000 - que->cq_prod_idx + prod_idx;
1875
1876 /* Save producer index */
1877 que->cq_prod_idx = prod_idx;
1878
1879 while (new_cqes) {
1880 fp->completions++;
1881 num_handled++;
1882 cqe = &que->cq[que->cq_cons_idx];
1883
1884 comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
1885 FCOE_CQE_CQE_TYPE_MASK;
1886
1887 /*
1888 * Process unsolicited CQEs directly in the interrupt handler
1889 * sine we need the fastpath ID
1890 */
1891 if (comp_type == FCOE_UNSOLIC_CQE_TYPE) {
1892 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
1893 "Unsolicated CQE.\n");
1894 qedf_process_unsol_compl(qedf, fp->sb_id, cqe);
1895 /*
1896 * Don't add a work list item. Increment consumer
1897 * consumer index and move on.
1898 */
1899 goto inc_idx;
1900 }
1901
1902 xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
1903 io_req = &qedf->cmd_mgr->cmds[xid];
1904
1905 /*
1906 * Figure out which percpu thread we should queue this I/O
1907 * on.
1908 */
1909 if (!io_req)
1910 /* If there is not io_req assocated with this CQE
1911 * just queue it on CPU 0
1912 */
1913 cpu = 0;
1914 else {
1915 cpu = io_req->cpu;
1916 io_req->int_cpu = smp_processor_id();
1917 }
1918
1919 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
1920 if (!io_work) {
1921 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
1922 "work for I/O completion.\n");
1923 continue;
1924 }
1925 memset(io_work, 0, sizeof(struct qedf_io_work));
1926
1927 INIT_WORK(&io_work->work, qedf_fp_io_handler);
1928
1929 /* Copy contents of CQE for deferred processing */
1930 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));
1931
1932 io_work->qedf = fp->qedf;
1933 io_work->fp = NULL; /* Only used for unsolicited frames */
1934
1935 queue_work_on(cpu, qedf_io_wq, &io_work->work);
1936
1937 inc_idx:
1938 que->cq_cons_idx++;
1939 if (que->cq_cons_idx == fp->cq_num_entries)
1940 que->cq_cons_idx = 0;
1941 new_cqes--;
1942 }
1943
1944 return true;
1945 }
1946
1947
1948 /* MSI-X fastpath handler code */
1949 static irqreturn_t qedf_msix_handler(int irq, void *dev_id)
1950 {
1951 struct qedf_fastpath *fp = dev_id;
1952
1953 if (!fp) {
1954 QEDF_ERR(NULL, "fp is null.\n");
1955 return IRQ_HANDLED;
1956 }
1957 if (!fp->sb_info) {
1958 QEDF_ERR(NULL, "fp->sb_info in null.");
1959 return IRQ_HANDLED;
1960 }
1961
1962 /*
1963 * Disable interrupts for this status block while we process new
1964 * completions
1965 */
1966 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);
1967
1968 while (1) {
1969 qedf_process_completions(fp);
1970
1971 if (qedf_fp_has_work(fp) == 0) {
1972 /* Update the sb information */
1973 qed_sb_update_sb_idx(fp->sb_info);
1974
1975 /* Check for more work */
1976 rmb();
1977
1978 if (qedf_fp_has_work(fp) == 0) {
1979 /* Re-enable interrupts */
1980 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1981 return IRQ_HANDLED;
1982 }
1983 }
1984 }
1985
1986 /* Do we ever want to break out of above loop? */
1987 return IRQ_HANDLED;
1988 }
1989
1990 /* simd handler for MSI/INTa */
1991 static void qedf_simd_int_handler(void *cookie)
1992 {
1993 /* Cookie is qedf_ctx struct */
1994 struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
1995
1996 QEDF_WARN(&(qedf->dbg_ctx), "qedf=%p.\n", qedf);
1997 }
1998
1999 #define QEDF_SIMD_HANDLER_NUM 0
2000 static void qedf_sync_free_irqs(struct qedf_ctx *qedf)
2001 {
2002 int i;
2003
2004 if (qedf->int_info.msix_cnt) {
2005 for (i = 0; i < qedf->int_info.used_cnt; i++) {
2006 synchronize_irq(qedf->int_info.msix[i].vector);
2007 irq_set_affinity_hint(qedf->int_info.msix[i].vector,
2008 NULL);
2009 irq_set_affinity_notifier(qedf->int_info.msix[i].vector,
2010 NULL);
2011 free_irq(qedf->int_info.msix[i].vector,
2012 &qedf->fp_array[i]);
2013 }
2014 } else
2015 qed_ops->common->simd_handler_clean(qedf->cdev,
2016 QEDF_SIMD_HANDLER_NUM);
2017
2018 qedf->int_info.used_cnt = 0;
2019 qed_ops->common->set_fp_int(qedf->cdev, 0);
2020 }
2021
2022 static int qedf_request_msix_irq(struct qedf_ctx *qedf)
2023 {
2024 int i, rc, cpu;
2025
2026 cpu = cpumask_first(cpu_online_mask);
2027 for (i = 0; i < qedf->num_queues; i++) {
2028 rc = request_irq(qedf->int_info.msix[i].vector,
2029 qedf_msix_handler, 0, "qedf", &qedf->fp_array[i]);
2030
2031 if (rc) {
2032 QEDF_WARN(&(qedf->dbg_ctx), "request_irq failed.\n");
2033 qedf_sync_free_irqs(qedf);
2034 return rc;
2035 }
2036
2037 qedf->int_info.used_cnt++;
2038 rc = irq_set_affinity_hint(qedf->int_info.msix[i].vector,
2039 get_cpu_mask(cpu));
2040 cpu = cpumask_next(cpu, cpu_online_mask);
2041 }
2042
2043 return 0;
2044 }
2045
2046 static int qedf_setup_int(struct qedf_ctx *qedf)
2047 {
2048 int rc = 0;
2049
2050 /*
2051 * Learn interrupt configuration
2052 */
2053 rc = qed_ops->common->set_fp_int(qedf->cdev, num_online_cpus());
2054 if (rc <= 0)
2055 return 0;
2056
2057 rc = qed_ops->common->get_fp_int(qedf->cdev, &qedf->int_info);
2058 if (rc)
2059 return 0;
2060
2061 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of msix_cnt = "
2062 "0x%x num of cpus = 0x%x\n", qedf->int_info.msix_cnt,
2063 num_online_cpus());
2064
2065 if (qedf->int_info.msix_cnt)
2066 return qedf_request_msix_irq(qedf);
2067
2068 qed_ops->common->simd_handler_config(qedf->cdev, &qedf,
2069 QEDF_SIMD_HANDLER_NUM, qedf_simd_int_handler);
2070 qedf->int_info.used_cnt = 1;
2071
2072 return 0;
2073 }
2074
2075 /* Main function for libfc frame reception */
2076 static void qedf_recv_frame(struct qedf_ctx *qedf,
2077 struct sk_buff *skb)
2078 {
2079 u32 fr_len;
2080 struct fc_lport *lport;
2081 struct fc_frame_header *fh;
2082 struct fcoe_crc_eof crc_eof;
2083 struct fc_frame *fp;
2084 u8 *mac = NULL;
2085 u8 *dest_mac = NULL;
2086 struct fcoe_hdr *hp;
2087 struct qedf_rport *fcport;
2088 struct fc_lport *vn_port;
2089 u32 f_ctl;
2090
2091 lport = qedf->lport;
2092 if (lport == NULL || lport->state == LPORT_ST_DISABLED) {
2093 QEDF_WARN(NULL, "Invalid lport struct or lport disabled.\n");
2094 kfree_skb(skb);
2095 return;
2096 }
2097
2098 if (skb_is_nonlinear(skb))
2099 skb_linearize(skb);
2100 mac = eth_hdr(skb)->h_source;
2101 dest_mac = eth_hdr(skb)->h_dest;
2102
2103 /* Pull the header */
2104 hp = (struct fcoe_hdr *)skb->data;
2105 fh = (struct fc_frame_header *) skb_transport_header(skb);
2106 skb_pull(skb, sizeof(struct fcoe_hdr));
2107 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
2108
2109 fp = (struct fc_frame *)skb;
2110 fc_frame_init(fp);
2111 fr_dev(fp) = lport;
2112 fr_sof(fp) = hp->fcoe_sof;
2113 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
2114 kfree_skb(skb);
2115 return;
2116 }
2117 fr_eof(fp) = crc_eof.fcoe_eof;
2118 fr_crc(fp) = crc_eof.fcoe_crc32;
2119 if (pskb_trim(skb, fr_len)) {
2120 kfree_skb(skb);
2121 return;
2122 }
2123
2124 fh = fc_frame_header_get(fp);
2125
2126 /*
2127 * Invalid frame filters.
2128 */
2129
2130 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
2131 fh->fh_type == FC_TYPE_FCP) {
2132 /* Drop FCP data. We dont this in L2 path */
2133 kfree_skb(skb);
2134 return;
2135 }
2136 if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
2137 fh->fh_type == FC_TYPE_ELS) {
2138 switch (fc_frame_payload_op(fp)) {
2139 case ELS_LOGO:
2140 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
2141 /* drop non-FIP LOGO */
2142 kfree_skb(skb);
2143 return;
2144 }
2145 break;
2146 }
2147 }
2148
2149 if (fh->fh_r_ctl == FC_RCTL_BA_ABTS) {
2150 /* Drop incoming ABTS */
2151 kfree_skb(skb);
2152 return;
2153 }
2154
2155 if (ntoh24(&dest_mac[3]) != ntoh24(fh->fh_d_id)) {
2156 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2157 "FC frame d_id mismatch with MAC %pM.\n", dest_mac);
2158 return;
2159 }
2160
2161 if (qedf->ctlr.state) {
2162 if (!ether_addr_equal(mac, qedf->ctlr.dest_addr)) {
2163 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2164 "Wrong source address: mac:%pM dest_addr:%pM.\n",
2165 mac, qedf->ctlr.dest_addr);
2166 kfree_skb(skb);
2167 return;
2168 }
2169 }
2170
2171 vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
2172
2173 /*
2174 * If the destination ID from the frame header does not match what we
2175 * have on record for lport and the search for a NPIV port came up
2176 * empty then this is not addressed to our port so simply drop it.
2177 */
2178 if (lport->port_id != ntoh24(fh->fh_d_id) && !vn_port) {
2179 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2180 "Dropping frame due to destination mismatch: lport->port_id=%x fh->d_id=%x.\n",
2181 lport->port_id, ntoh24(fh->fh_d_id));
2182 kfree_skb(skb);
2183 return;
2184 }
2185
2186 f_ctl = ntoh24(fh->fh_f_ctl);
2187 if ((fh->fh_type == FC_TYPE_BLS) && (f_ctl & FC_FC_SEQ_CTX) &&
2188 (f_ctl & FC_FC_EX_CTX)) {
2189 /* Drop incoming ABTS response that has both SEQ/EX CTX set */
2190 kfree_skb(skb);
2191 return;
2192 }
2193
2194 /*
2195 * If a connection is uploading, drop incoming FCoE frames as there
2196 * is a small window where we could try to return a frame while libfc
2197 * is trying to clean things up.
2198 */
2199
2200 /* Get fcport associated with d_id if it exists */
2201 fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
2202
2203 if (fcport && test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
2204 &fcport->flags)) {
2205 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2206 "Connection uploading, dropping fp=%p.\n", fp);
2207 kfree_skb(skb);
2208 return;
2209 }
2210
2211 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame receive: "
2212 "skb=%p fp=%p src=%06x dest=%06x r_ctl=%x fh_type=%x.\n", skb, fp,
2213 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl,
2214 fh->fh_type);
2215 if (qedf_dump_frames)
2216 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
2217 1, skb->data, skb->len, false);
2218 fc_exch_recv(lport, fp);
2219 }
2220
2221 static void qedf_ll2_process_skb(struct work_struct *work)
2222 {
2223 struct qedf_skb_work *skb_work =
2224 container_of(work, struct qedf_skb_work, work);
2225 struct qedf_ctx *qedf = skb_work->qedf;
2226 struct sk_buff *skb = skb_work->skb;
2227 struct ethhdr *eh;
2228
2229 if (!qedf) {
2230 QEDF_ERR(NULL, "qedf is NULL\n");
2231 goto err_out;
2232 }
2233
2234 eh = (struct ethhdr *)skb->data;
2235
2236 /* Undo VLAN encapsulation */
2237 if (eh->h_proto == htons(ETH_P_8021Q)) {
2238 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
2239 eh = skb_pull(skb, VLAN_HLEN);
2240 skb_reset_mac_header(skb);
2241 }
2242
2243 /*
2244 * Process either a FIP frame or FCoE frame based on the
2245 * protocol value. If it's not either just drop the
2246 * frame.
2247 */
2248 if (eh->h_proto == htons(ETH_P_FIP)) {
2249 qedf_fip_recv(qedf, skb);
2250 goto out;
2251 } else if (eh->h_proto == htons(ETH_P_FCOE)) {
2252 __skb_pull(skb, ETH_HLEN);
2253 qedf_recv_frame(qedf, skb);
2254 goto out;
2255 } else
2256 goto err_out;
2257
2258 err_out:
2259 kfree_skb(skb);
2260 out:
2261 kfree(skb_work);
2262 return;
2263 }
2264
2265 static int qedf_ll2_rx(void *cookie, struct sk_buff *skb,
2266 u32 arg1, u32 arg2)
2267 {
2268 struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
2269 struct qedf_skb_work *skb_work;
2270
2271 skb_work = kzalloc(sizeof(struct qedf_skb_work), GFP_ATOMIC);
2272 if (!skb_work) {
2273 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate skb_work so "
2274 "dropping frame.\n");
2275 kfree_skb(skb);
2276 return 0;
2277 }
2278
2279 INIT_WORK(&skb_work->work, qedf_ll2_process_skb);
2280 skb_work->skb = skb;
2281 skb_work->qedf = qedf;
2282 queue_work(qedf->ll2_recv_wq, &skb_work->work);
2283
2284 return 0;
2285 }
2286
2287 static struct qed_ll2_cb_ops qedf_ll2_cb_ops = {
2288 .rx_cb = qedf_ll2_rx,
2289 .tx_cb = NULL,
2290 };
2291
2292 /* Main thread to process I/O completions */
2293 void qedf_fp_io_handler(struct work_struct *work)
2294 {
2295 struct qedf_io_work *io_work =
2296 container_of(work, struct qedf_io_work, work);
2297 u32 comp_type;
2298
2299 /*
2300 * Deferred part of unsolicited CQE sends
2301 * frame to libfc.
2302 */
2303 comp_type = (io_work->cqe.cqe_data >>
2304 FCOE_CQE_CQE_TYPE_SHIFT) &
2305 FCOE_CQE_CQE_TYPE_MASK;
2306 if (comp_type == FCOE_UNSOLIC_CQE_TYPE &&
2307 io_work->fp)
2308 fc_exch_recv(io_work->qedf->lport, io_work->fp);
2309 else
2310 qedf_process_cqe(io_work->qedf, &io_work->cqe);
2311
2312 kfree(io_work);
2313 }
2314
2315 static int qedf_alloc_and_init_sb(struct qedf_ctx *qedf,
2316 struct qed_sb_info *sb_info, u16 sb_id)
2317 {
2318 struct status_block *sb_virt;
2319 dma_addr_t sb_phys;
2320 int ret;
2321
2322 sb_virt = dma_alloc_coherent(&qedf->pdev->dev,
2323 sizeof(struct status_block), &sb_phys, GFP_KERNEL);
2324
2325 if (!sb_virt) {
2326 QEDF_ERR(&(qedf->dbg_ctx), "Status block allocation failed "
2327 "for id = %d.\n", sb_id);
2328 return -ENOMEM;
2329 }
2330
2331 ret = qed_ops->common->sb_init(qedf->cdev, sb_info, sb_virt, sb_phys,
2332 sb_id, QED_SB_TYPE_STORAGE);
2333
2334 if (ret) {
2335 QEDF_ERR(&(qedf->dbg_ctx), "Status block initialization "
2336 "failed for id = %d.\n", sb_id);
2337 return ret;
2338 }
2339
2340 return 0;
2341 }
2342
2343 static void qedf_free_sb(struct qedf_ctx *qedf, struct qed_sb_info *sb_info)
2344 {
2345 if (sb_info->sb_virt)
2346 dma_free_coherent(&qedf->pdev->dev, sizeof(*sb_info->sb_virt),
2347 (void *)sb_info->sb_virt, sb_info->sb_phys);
2348 }
2349
2350 static void qedf_destroy_sb(struct qedf_ctx *qedf)
2351 {
2352 int id;
2353 struct qedf_fastpath *fp = NULL;
2354
2355 for (id = 0; id < qedf->num_queues; id++) {
2356 fp = &(qedf->fp_array[id]);
2357 if (fp->sb_id == QEDF_SB_ID_NULL)
2358 break;
2359 qedf_free_sb(qedf, fp->sb_info);
2360 kfree(fp->sb_info);
2361 }
2362 kfree(qedf->fp_array);
2363 }
2364
2365 static int qedf_prepare_sb(struct qedf_ctx *qedf)
2366 {
2367 int id;
2368 struct qedf_fastpath *fp;
2369 int ret;
2370
2371 qedf->fp_array =
2372 kcalloc(qedf->num_queues, sizeof(struct qedf_fastpath),
2373 GFP_KERNEL);
2374
2375 if (!qedf->fp_array) {
2376 QEDF_ERR(&(qedf->dbg_ctx), "fastpath array allocation "
2377 "failed.\n");
2378 return -ENOMEM;
2379 }
2380
2381 for (id = 0; id < qedf->num_queues; id++) {
2382 fp = &(qedf->fp_array[id]);
2383 fp->sb_id = QEDF_SB_ID_NULL;
2384 fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
2385 if (!fp->sb_info) {
2386 QEDF_ERR(&(qedf->dbg_ctx), "SB info struct "
2387 "allocation failed.\n");
2388 goto err;
2389 }
2390 ret = qedf_alloc_and_init_sb(qedf, fp->sb_info, id);
2391 if (ret) {
2392 QEDF_ERR(&(qedf->dbg_ctx), "SB allocation and "
2393 "initialization failed.\n");
2394 goto err;
2395 }
2396 fp->sb_id = id;
2397 fp->qedf = qedf;
2398 fp->cq_num_entries =
2399 qedf->global_queues[id]->cq_mem_size /
2400 sizeof(struct fcoe_cqe);
2401 }
2402 err:
2403 return 0;
2404 }
2405
2406 void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
2407 {
2408 u16 xid;
2409 struct qedf_ioreq *io_req;
2410 struct qedf_rport *fcport;
2411 u32 comp_type;
2412
2413 comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
2414 FCOE_CQE_CQE_TYPE_MASK;
2415
2416 xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
2417 io_req = &qedf->cmd_mgr->cmds[xid];
2418
2419 /* Completion not for a valid I/O anymore so just return */
2420 if (!io_req)
2421 return;
2422
2423 fcport = io_req->fcport;
2424
2425 if (fcport == NULL) {
2426 QEDF_ERR(&(qedf->dbg_ctx), "fcport is NULL.\n");
2427 return;
2428 }
2429
2430 /*
2431 * Check that fcport is offloaded. If it isn't then the spinlock
2432 * isn't valid and shouldn't be taken. We should just return.
2433 */
2434 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
2435 QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n");
2436 return;
2437 }
2438
2439
2440 switch (comp_type) {
2441 case FCOE_GOOD_COMPLETION_CQE_TYPE:
2442 atomic_inc(&fcport->free_sqes);
2443 switch (io_req->cmd_type) {
2444 case QEDF_SCSI_CMD:
2445 qedf_scsi_completion(qedf, cqe, io_req);
2446 break;
2447 case QEDF_ELS:
2448 qedf_process_els_compl(qedf, cqe, io_req);
2449 break;
2450 case QEDF_TASK_MGMT_CMD:
2451 qedf_process_tmf_compl(qedf, cqe, io_req);
2452 break;
2453 case QEDF_SEQ_CLEANUP:
2454 qedf_process_seq_cleanup_compl(qedf, cqe, io_req);
2455 break;
2456 }
2457 break;
2458 case FCOE_ERROR_DETECTION_CQE_TYPE:
2459 atomic_inc(&fcport->free_sqes);
2460 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2461 "Error detect CQE.\n");
2462 qedf_process_error_detect(qedf, cqe, io_req);
2463 break;
2464 case FCOE_EXCH_CLEANUP_CQE_TYPE:
2465 atomic_inc(&fcport->free_sqes);
2466 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2467 "Cleanup CQE.\n");
2468 qedf_process_cleanup_compl(qedf, cqe, io_req);
2469 break;
2470 case FCOE_ABTS_CQE_TYPE:
2471 atomic_inc(&fcport->free_sqes);
2472 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2473 "Abort CQE.\n");
2474 qedf_process_abts_compl(qedf, cqe, io_req);
2475 break;
2476 case FCOE_DUMMY_CQE_TYPE:
2477 atomic_inc(&fcport->free_sqes);
2478 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2479 "Dummy CQE.\n");
2480 break;
2481 case FCOE_LOCAL_COMP_CQE_TYPE:
2482 atomic_inc(&fcport->free_sqes);
2483 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2484 "Local completion CQE.\n");
2485 break;
2486 case FCOE_WARNING_CQE_TYPE:
2487 atomic_inc(&fcport->free_sqes);
2488 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2489 "Warning CQE.\n");
2490 qedf_process_warning_compl(qedf, cqe, io_req);
2491 break;
2492 case MAX_FCOE_CQE_TYPE:
2493 atomic_inc(&fcport->free_sqes);
2494 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2495 "Max FCoE CQE.\n");
2496 break;
2497 default:
2498 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2499 "Default CQE.\n");
2500 break;
2501 }
2502 }
2503
2504 static void qedf_free_bdq(struct qedf_ctx *qedf)
2505 {
2506 int i;
2507
2508 if (qedf->bdq_pbl_list)
2509 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
2510 qedf->bdq_pbl_list, qedf->bdq_pbl_list_dma);
2511
2512 if (qedf->bdq_pbl)
2513 dma_free_coherent(&qedf->pdev->dev, qedf->bdq_pbl_mem_size,
2514 qedf->bdq_pbl, qedf->bdq_pbl_dma);
2515
2516 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2517 if (qedf->bdq[i].buf_addr) {
2518 dma_free_coherent(&qedf->pdev->dev, QEDF_BDQ_BUF_SIZE,
2519 qedf->bdq[i].buf_addr, qedf->bdq[i].buf_dma);
2520 }
2521 }
2522 }
2523
2524 static void qedf_free_global_queues(struct qedf_ctx *qedf)
2525 {
2526 int i;
2527 struct global_queue **gl = qedf->global_queues;
2528
2529 for (i = 0; i < qedf->num_queues; i++) {
2530 if (!gl[i])
2531 continue;
2532
2533 if (gl[i]->cq)
2534 dma_free_coherent(&qedf->pdev->dev,
2535 gl[i]->cq_mem_size, gl[i]->cq, gl[i]->cq_dma);
2536 if (gl[i]->cq_pbl)
2537 dma_free_coherent(&qedf->pdev->dev, gl[i]->cq_pbl_size,
2538 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
2539
2540 kfree(gl[i]);
2541 }
2542
2543 qedf_free_bdq(qedf);
2544 }
2545
2546 static int qedf_alloc_bdq(struct qedf_ctx *qedf)
2547 {
2548 int i;
2549 struct scsi_bd *pbl;
2550 u64 *list;
2551 dma_addr_t page;
2552
2553 /* Alloc dma memory for BDQ buffers */
2554 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2555 qedf->bdq[i].buf_addr = dma_alloc_coherent(&qedf->pdev->dev,
2556 QEDF_BDQ_BUF_SIZE, &qedf->bdq[i].buf_dma, GFP_KERNEL);
2557 if (!qedf->bdq[i].buf_addr) {
2558 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ "
2559 "buffer %d.\n", i);
2560 return -ENOMEM;
2561 }
2562 }
2563
2564 /* Alloc dma memory for BDQ page buffer list */
2565 qedf->bdq_pbl_mem_size =
2566 QEDF_BDQ_SIZE * sizeof(struct scsi_bd);
2567 qedf->bdq_pbl_mem_size =
2568 ALIGN(qedf->bdq_pbl_mem_size, QEDF_PAGE_SIZE);
2569
2570 qedf->bdq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
2571 qedf->bdq_pbl_mem_size, &qedf->bdq_pbl_dma, GFP_KERNEL);
2572 if (!qedf->bdq_pbl) {
2573 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ PBL.\n");
2574 return -ENOMEM;
2575 }
2576
2577 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2578 "BDQ PBL addr=0x%p dma=%pad\n",
2579 qedf->bdq_pbl, &qedf->bdq_pbl_dma);
2580
2581 /*
2582 * Populate BDQ PBL with physical and virtual address of individual
2583 * BDQ buffers
2584 */
2585 pbl = (struct scsi_bd *)qedf->bdq_pbl;
2586 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2587 pbl->address.hi = cpu_to_le32(U64_HI(qedf->bdq[i].buf_dma));
2588 pbl->address.lo = cpu_to_le32(U64_LO(qedf->bdq[i].buf_dma));
2589 pbl->opaque.hi = 0;
2590 /* Opaque lo data is an index into the BDQ array */
2591 pbl->opaque.lo = cpu_to_le32(i);
2592 pbl++;
2593 }
2594
2595 /* Allocate list of PBL pages */
2596 qedf->bdq_pbl_list = dma_zalloc_coherent(&qedf->pdev->dev,
2597 QEDF_PAGE_SIZE, &qedf->bdq_pbl_list_dma, GFP_KERNEL);
2598 if (!qedf->bdq_pbl_list) {
2599 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate list of PBL pages.\n");
2600 return -ENOMEM;
2601 }
2602
2603 /*
2604 * Now populate PBL list with pages that contain pointers to the
2605 * individual buffers.
2606 */
2607 qedf->bdq_pbl_list_num_entries = qedf->bdq_pbl_mem_size /
2608 QEDF_PAGE_SIZE;
2609 list = (u64 *)qedf->bdq_pbl_list;
2610 page = qedf->bdq_pbl_list_dma;
2611 for (i = 0; i < qedf->bdq_pbl_list_num_entries; i++) {
2612 *list = qedf->bdq_pbl_dma;
2613 list++;
2614 page += QEDF_PAGE_SIZE;
2615 }
2616
2617 return 0;
2618 }
2619
2620 static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
2621 {
2622 u32 *list;
2623 int i;
2624 int status = 0, rc;
2625 u32 *pbl;
2626 dma_addr_t page;
2627 int num_pages;
2628
2629 /* Allocate and map CQs, RQs */
2630 /*
2631 * Number of global queues (CQ / RQ). This should
2632 * be <= number of available MSIX vectors for the PF
2633 */
2634 if (!qedf->num_queues) {
2635 QEDF_ERR(&(qedf->dbg_ctx), "No MSI-X vectors available!\n");
2636 return 1;
2637 }
2638
2639 /*
2640 * Make sure we allocated the PBL that will contain the physical
2641 * addresses of our queues
2642 */
2643 if (!qedf->p_cpuq) {
2644 status = 1;
2645 goto mem_alloc_failure;
2646 }
2647
2648 qedf->global_queues = kzalloc((sizeof(struct global_queue *)
2649 * qedf->num_queues), GFP_KERNEL);
2650 if (!qedf->global_queues) {
2651 QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate global "
2652 "queues array ptr memory\n");
2653 return -ENOMEM;
2654 }
2655 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2656 "qedf->global_queues=%p.\n", qedf->global_queues);
2657
2658 /* Allocate DMA coherent buffers for BDQ */
2659 rc = qedf_alloc_bdq(qedf);
2660 if (rc)
2661 goto mem_alloc_failure;
2662
2663 /* Allocate a CQ and an associated PBL for each MSI-X vector */
2664 for (i = 0; i < qedf->num_queues; i++) {
2665 qedf->global_queues[i] = kzalloc(sizeof(struct global_queue),
2666 GFP_KERNEL);
2667 if (!qedf->global_queues[i]) {
2668 QEDF_WARN(&(qedf->dbg_ctx), "Unable to allocate "
2669 "global queue %d.\n", i);
2670 status = -ENOMEM;
2671 goto mem_alloc_failure;
2672 }
2673
2674 qedf->global_queues[i]->cq_mem_size =
2675 FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
2676 qedf->global_queues[i]->cq_mem_size =
2677 ALIGN(qedf->global_queues[i]->cq_mem_size, QEDF_PAGE_SIZE);
2678
2679 qedf->global_queues[i]->cq_pbl_size =
2680 (qedf->global_queues[i]->cq_mem_size /
2681 PAGE_SIZE) * sizeof(void *);
2682 qedf->global_queues[i]->cq_pbl_size =
2683 ALIGN(qedf->global_queues[i]->cq_pbl_size, QEDF_PAGE_SIZE);
2684
2685 qedf->global_queues[i]->cq =
2686 dma_zalloc_coherent(&qedf->pdev->dev,
2687 qedf->global_queues[i]->cq_mem_size,
2688 &qedf->global_queues[i]->cq_dma, GFP_KERNEL);
2689
2690 if (!qedf->global_queues[i]->cq) {
2691 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq.\n");
2692 status = -ENOMEM;
2693 goto mem_alloc_failure;
2694 }
2695
2696 qedf->global_queues[i]->cq_pbl =
2697 dma_zalloc_coherent(&qedf->pdev->dev,
2698 qedf->global_queues[i]->cq_pbl_size,
2699 &qedf->global_queues[i]->cq_pbl_dma, GFP_KERNEL);
2700
2701 if (!qedf->global_queues[i]->cq_pbl) {
2702 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq PBL.\n");
2703 status = -ENOMEM;
2704 goto mem_alloc_failure;
2705 }
2706
2707 /* Create PBL */
2708 num_pages = qedf->global_queues[i]->cq_mem_size /
2709 QEDF_PAGE_SIZE;
2710 page = qedf->global_queues[i]->cq_dma;
2711 pbl = (u32 *)qedf->global_queues[i]->cq_pbl;
2712
2713 while (num_pages--) {
2714 *pbl = U64_LO(page);
2715 pbl++;
2716 *pbl = U64_HI(page);
2717 pbl++;
2718 page += QEDF_PAGE_SIZE;
2719 }
2720 /* Set the initial consumer index for cq */
2721 qedf->global_queues[i]->cq_cons_idx = 0;
2722 }
2723
2724 list = (u32 *)qedf->p_cpuq;
2725
2726 /*
2727 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
2728 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
2729 * to the physical address which contains an array of pointers to
2730 * the physical addresses of the specific queue pages.
2731 */
2732 for (i = 0; i < qedf->num_queues; i++) {
2733 *list = U64_LO(qedf->global_queues[i]->cq_pbl_dma);
2734 list++;
2735 *list = U64_HI(qedf->global_queues[i]->cq_pbl_dma);
2736 list++;
2737 *list = U64_LO(0);
2738 list++;
2739 *list = U64_HI(0);
2740 list++;
2741 }
2742
2743 return 0;
2744
2745 mem_alloc_failure:
2746 qedf_free_global_queues(qedf);
2747 return status;
2748 }
2749
2750 static int qedf_set_fcoe_pf_param(struct qedf_ctx *qedf)
2751 {
2752 u8 sq_num_pbl_pages;
2753 u32 sq_mem_size;
2754 u32 cq_mem_size;
2755 u32 cq_num_entries;
2756 int rval;
2757
2758 /*
2759 * The number of completion queues/fastpath interrupts/status blocks
2760 * we allocation is the minimum off:
2761 *
2762 * Number of CPUs
2763 * Number allocated by qed for our PCI function
2764 */
2765 qedf->num_queues = MIN_NUM_CPUS_MSIX(qedf);
2766
2767 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of CQs is %d.\n",
2768 qedf->num_queues);
2769
2770 qedf->p_cpuq = pci_alloc_consistent(qedf->pdev,
2771 qedf->num_queues * sizeof(struct qedf_glbl_q_params),
2772 &qedf->hw_p_cpuq);
2773
2774 if (!qedf->p_cpuq) {
2775 QEDF_ERR(&(qedf->dbg_ctx), "pci_alloc_consistent failed.\n");
2776 return 1;
2777 }
2778
2779 rval = qedf_alloc_global_queues(qedf);
2780 if (rval) {
2781 QEDF_ERR(&(qedf->dbg_ctx), "Global queue allocation "
2782 "failed.\n");
2783 return 1;
2784 }
2785
2786 /* Calculate SQ PBL size in the same manner as in qedf_sq_alloc() */
2787 sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
2788 sq_mem_size = ALIGN(sq_mem_size, QEDF_PAGE_SIZE);
2789 sq_num_pbl_pages = (sq_mem_size / QEDF_PAGE_SIZE);
2790
2791 /* Calculate CQ num entries */
2792 cq_mem_size = FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
2793 cq_mem_size = ALIGN(cq_mem_size, QEDF_PAGE_SIZE);
2794 cq_num_entries = cq_mem_size / sizeof(struct fcoe_cqe);
2795
2796 memset(&(qedf->pf_params), 0, sizeof(qedf->pf_params));
2797
2798 /* Setup the value for fcoe PF */
2799 qedf->pf_params.fcoe_pf_params.num_cons = QEDF_MAX_SESSIONS;
2800 qedf->pf_params.fcoe_pf_params.num_tasks = FCOE_PARAMS_NUM_TASKS;
2801 qedf->pf_params.fcoe_pf_params.glbl_q_params_addr =
2802 (u64)qedf->hw_p_cpuq;
2803 qedf->pf_params.fcoe_pf_params.sq_num_pbl_pages = sq_num_pbl_pages;
2804
2805 qedf->pf_params.fcoe_pf_params.rq_buffer_log_size = 0;
2806
2807 qedf->pf_params.fcoe_pf_params.cq_num_entries = cq_num_entries;
2808 qedf->pf_params.fcoe_pf_params.num_cqs = qedf->num_queues;
2809
2810 /* log_page_size: 12 for 4KB pages */
2811 qedf->pf_params.fcoe_pf_params.log_page_size = ilog2(QEDF_PAGE_SIZE);
2812
2813 qedf->pf_params.fcoe_pf_params.mtu = 9000;
2814 qedf->pf_params.fcoe_pf_params.gl_rq_pi = QEDF_FCOE_PARAMS_GL_RQ_PI;
2815 qedf->pf_params.fcoe_pf_params.gl_cmd_pi = QEDF_FCOE_PARAMS_GL_CMD_PI;
2816
2817 /* BDQ address and size */
2818 qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0] =
2819 qedf->bdq_pbl_list_dma;
2820 qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0] =
2821 qedf->bdq_pbl_list_num_entries;
2822 qedf->pf_params.fcoe_pf_params.rq_buffer_size = QEDF_BDQ_BUF_SIZE;
2823
2824 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2825 "bdq_list=%p bdq_pbl_list_dma=%llx bdq_pbl_list_entries=%d.\n",
2826 qedf->bdq_pbl_list,
2827 qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0],
2828 qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0]);
2829
2830 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2831 "cq_num_entries=%d.\n",
2832 qedf->pf_params.fcoe_pf_params.cq_num_entries);
2833
2834 return 0;
2835 }
2836
2837 /* Free DMA coherent memory for array of queue pointers we pass to qed */
2838 static void qedf_free_fcoe_pf_param(struct qedf_ctx *qedf)
2839 {
2840 size_t size = 0;
2841
2842 if (qedf->p_cpuq) {
2843 size = qedf->num_queues * sizeof(struct qedf_glbl_q_params);
2844 pci_free_consistent(qedf->pdev, size, qedf->p_cpuq,
2845 qedf->hw_p_cpuq);
2846 }
2847
2848 qedf_free_global_queues(qedf);
2849
2850 if (qedf->global_queues)
2851 kfree(qedf->global_queues);
2852 }
2853
2854 /*
2855 * PCI driver functions
2856 */
2857
2858 static const struct pci_device_id qedf_pci_tbl[] = {
2859 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165c) },
2860 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8080) },
2861 {0}
2862 };
2863 MODULE_DEVICE_TABLE(pci, qedf_pci_tbl);
2864
2865 static struct pci_driver qedf_pci_driver = {
2866 .name = QEDF_MODULE_NAME,
2867 .id_table = qedf_pci_tbl,
2868 .probe = qedf_probe,
2869 .remove = qedf_remove,
2870 };
2871
2872 static int __qedf_probe(struct pci_dev *pdev, int mode)
2873 {
2874 int rc = -EINVAL;
2875 struct fc_lport *lport;
2876 struct qedf_ctx *qedf;
2877 struct Scsi_Host *host;
2878 bool is_vf = false;
2879 struct qed_ll2_params params;
2880 char host_buf[20];
2881 struct qed_link_params link_params;
2882 int status;
2883 void *task_start, *task_end;
2884 struct qed_slowpath_params slowpath_params;
2885 struct qed_probe_params qed_params;
2886 u16 tmp;
2887
2888 /*
2889 * When doing error recovery we didn't reap the lport so don't try
2890 * to reallocate it.
2891 */
2892 if (mode != QEDF_MODE_RECOVERY) {
2893 lport = libfc_host_alloc(&qedf_host_template,
2894 sizeof(struct qedf_ctx));
2895
2896 if (!lport) {
2897 QEDF_ERR(NULL, "Could not allocate lport.\n");
2898 rc = -ENOMEM;
2899 goto err0;
2900 }
2901
2902 /* Initialize qedf_ctx */
2903 qedf = lport_priv(lport);
2904 qedf->lport = lport;
2905 qedf->ctlr.lp = lport;
2906 qedf->pdev = pdev;
2907 qedf->dbg_ctx.pdev = pdev;
2908 qedf->dbg_ctx.host_no = lport->host->host_no;
2909 spin_lock_init(&qedf->hba_lock);
2910 INIT_LIST_HEAD(&qedf->fcports);
2911 qedf->curr_conn_id = QEDF_MAX_SESSIONS - 1;
2912 atomic_set(&qedf->num_offloads, 0);
2913 qedf->stop_io_on_error = false;
2914 pci_set_drvdata(pdev, qedf);
2915 init_completion(&qedf->fipvlan_compl);
2916
2917 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO,
2918 "QLogic FastLinQ FCoE Module qedf %s, "
2919 "FW %d.%d.%d.%d\n", QEDF_VERSION,
2920 FW_MAJOR_VERSION, FW_MINOR_VERSION, FW_REVISION_VERSION,
2921 FW_ENGINEERING_VERSION);
2922 } else {
2923 /* Init pointers during recovery */
2924 qedf = pci_get_drvdata(pdev);
2925 lport = qedf->lport;
2926 }
2927
2928 host = lport->host;
2929
2930 /* Allocate mempool for qedf_io_work structs */
2931 qedf->io_mempool = mempool_create_slab_pool(QEDF_IO_WORK_MIN,
2932 qedf_io_work_cache);
2933 if (qedf->io_mempool == NULL) {
2934 QEDF_ERR(&(qedf->dbg_ctx), "qedf->io_mempool is NULL.\n");
2935 goto err1;
2936 }
2937 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO, "qedf->io_mempool=%p.\n",
2938 qedf->io_mempool);
2939
2940 sprintf(host_buf, "qedf_%u_link",
2941 qedf->lport->host->host_no);
2942 qedf->link_update_wq = create_singlethread_workqueue(host_buf);
2943 INIT_DELAYED_WORK(&qedf->link_update, qedf_handle_link_update);
2944 INIT_DELAYED_WORK(&qedf->link_recovery, qedf_link_recovery);
2945
2946 qedf->fipvlan_retries = qedf_fipvlan_retries;
2947
2948 /*
2949 * Common probe. Takes care of basic hardware init and pci_*
2950 * functions.
2951 */
2952 memset(&qed_params, 0, sizeof(qed_params));
2953 qed_params.protocol = QED_PROTOCOL_FCOE;
2954 qed_params.dp_module = qedf_dp_module;
2955 qed_params.dp_level = qedf_dp_level;
2956 qed_params.is_vf = is_vf;
2957 qedf->cdev = qed_ops->common->probe(pdev, &qed_params);
2958 if (!qedf->cdev) {
2959 rc = -ENODEV;
2960 goto err1;
2961 }
2962
2963 /* Learn information crucial for qedf to progress */
2964 rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
2965 if (rc) {
2966 QEDF_ERR(&(qedf->dbg_ctx), "Failed to dev info.\n");
2967 goto err1;
2968 }
2969
2970 /* queue allocation code should come here
2971 * order should be
2972 * slowpath_start
2973 * status block allocation
2974 * interrupt registration (to get min number of queues)
2975 * set_fcoe_pf_param
2976 * qed_sp_fcoe_func_start
2977 */
2978 rc = qedf_set_fcoe_pf_param(qedf);
2979 if (rc) {
2980 QEDF_ERR(&(qedf->dbg_ctx), "Cannot set fcoe pf param.\n");
2981 goto err2;
2982 }
2983 qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
2984
2985 /* Record BDQ producer doorbell addresses */
2986 qedf->bdq_primary_prod = qedf->dev_info.primary_dbq_rq_addr;
2987 qedf->bdq_secondary_prod = qedf->dev_info.secondary_bdq_rq_addr;
2988 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2989 "BDQ primary_prod=%p secondary_prod=%p.\n", qedf->bdq_primary_prod,
2990 qedf->bdq_secondary_prod);
2991
2992 qed_ops->register_ops(qedf->cdev, &qedf_cb_ops, qedf);
2993
2994 rc = qedf_prepare_sb(qedf);
2995 if (rc) {
2996
2997 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
2998 goto err2;
2999 }
3000
3001 /* Start the Slowpath-process */
3002 slowpath_params.int_mode = QED_INT_MODE_MSIX;
3003 slowpath_params.drv_major = QEDF_DRIVER_MAJOR_VER;
3004 slowpath_params.drv_minor = QEDF_DRIVER_MINOR_VER;
3005 slowpath_params.drv_rev = QEDF_DRIVER_REV_VER;
3006 slowpath_params.drv_eng = QEDF_DRIVER_ENG_VER;
3007 strncpy(slowpath_params.name, "qedf", QED_DRV_VER_STR_SIZE);
3008 rc = qed_ops->common->slowpath_start(qedf->cdev, &slowpath_params);
3009 if (rc) {
3010 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
3011 goto err2;
3012 }
3013
3014 /*
3015 * update_pf_params needs to be called before and after slowpath
3016 * start
3017 */
3018 qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
3019
3020 /* Setup interrupts */
3021 rc = qedf_setup_int(qedf);
3022 if (rc)
3023 goto err3;
3024
3025 rc = qed_ops->start(qedf->cdev, &qedf->tasks);
3026 if (rc) {
3027 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start FCoE function.\n");
3028 goto err4;
3029 }
3030 task_start = qedf_get_task_mem(&qedf->tasks, 0);
3031 task_end = qedf_get_task_mem(&qedf->tasks, MAX_TID_BLOCKS_FCOE - 1);
3032 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Task context start=%p, "
3033 "end=%p block_size=%u.\n", task_start, task_end,
3034 qedf->tasks.size);
3035
3036 /*
3037 * We need to write the number of BDs in the BDQ we've preallocated so
3038 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
3039 * packet arrives.
3040 */
3041 qedf->bdq_prod_idx = QEDF_BDQ_SIZE;
3042 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3043 "Writing %d to primary and secondary BDQ doorbell registers.\n",
3044 qedf->bdq_prod_idx);
3045 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod);
3046 tmp = readw(qedf->bdq_primary_prod);
3047 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod);
3048 tmp = readw(qedf->bdq_secondary_prod);
3049
3050 qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3051
3052 /* Now that the dev_info struct has been filled in set the MAC
3053 * address
3054 */
3055 ether_addr_copy(qedf->mac, qedf->dev_info.common.hw_mac);
3056 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "MAC address is %pM.\n",
3057 qedf->mac);
3058
3059 /* Set the WWNN and WWPN based on the MAC address */
3060 qedf->wwnn = fcoe_wwn_from_mac(qedf->mac, 1, 0);
3061 qedf->wwpn = fcoe_wwn_from_mac(qedf->mac, 2, 0);
3062 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "WWNN=%016llx "
3063 "WWPN=%016llx.\n", qedf->wwnn, qedf->wwpn);
3064
3065 sprintf(host_buf, "host_%d", host->host_no);
3066 qed_ops->common->set_name(qedf->cdev, host_buf);
3067
3068
3069 /* Set xid max values */
3070 qedf->max_scsi_xid = QEDF_MAX_SCSI_XID;
3071 qedf->max_els_xid = QEDF_MAX_ELS_XID;
3072
3073 /* Allocate cmd mgr */
3074 qedf->cmd_mgr = qedf_cmd_mgr_alloc(qedf);
3075 if (!qedf->cmd_mgr) {
3076 QEDF_ERR(&(qedf->dbg_ctx), "Failed to allocate cmd mgr.\n");
3077 goto err5;
3078 }
3079
3080 if (mode != QEDF_MODE_RECOVERY) {
3081 host->transportt = qedf_fc_transport_template;
3082 host->can_queue = QEDF_MAX_ELS_XID;
3083 host->max_lun = qedf_max_lun;
3084 host->max_cmd_len = QEDF_MAX_CDB_LEN;
3085 rc = scsi_add_host(host, &pdev->dev);
3086 if (rc)
3087 goto err6;
3088 }
3089
3090 memset(&params, 0, sizeof(params));
3091 params.mtu = 9000;
3092 ether_addr_copy(params.ll2_mac_address, qedf->mac);
3093
3094 /* Start LL2 processing thread */
3095 snprintf(host_buf, 20, "qedf_%d_ll2", host->host_no);
3096 qedf->ll2_recv_wq =
3097 create_singlethread_workqueue(host_buf);
3098 if (!qedf->ll2_recv_wq) {
3099 QEDF_ERR(&(qedf->dbg_ctx), "Failed to LL2 workqueue.\n");
3100 goto err7;
3101 }
3102
3103 #ifdef CONFIG_DEBUG_FS
3104 qedf_dbg_host_init(&(qedf->dbg_ctx), &qedf_debugfs_ops,
3105 &qedf_dbg_fops);
3106 #endif
3107
3108 /* Start LL2 */
3109 qed_ops->ll2->register_cb_ops(qedf->cdev, &qedf_ll2_cb_ops, qedf);
3110 rc = qed_ops->ll2->start(qedf->cdev, &params);
3111 if (rc) {
3112 QEDF_ERR(&(qedf->dbg_ctx), "Could not start Light L2.\n");
3113 goto err7;
3114 }
3115 set_bit(QEDF_LL2_STARTED, &qedf->flags);
3116
3117 /* hw will be insterting vlan tag*/
3118 qedf->vlan_hw_insert = 1;
3119 qedf->vlan_id = 0;
3120
3121 /*
3122 * No need to setup fcoe_ctlr or fc_lport objects during recovery since
3123 * they were not reaped during the unload process.
3124 */
3125 if (mode != QEDF_MODE_RECOVERY) {
3126 /* Setup imbedded fcoe controller */
3127 qedf_fcoe_ctlr_setup(qedf);
3128
3129 /* Setup lport */
3130 rc = qedf_lport_setup(qedf);
3131 if (rc) {
3132 QEDF_ERR(&(qedf->dbg_ctx),
3133 "qedf_lport_setup failed.\n");
3134 goto err7;
3135 }
3136 }
3137
3138 sprintf(host_buf, "qedf_%u_timer", qedf->lport->host->host_no);
3139 qedf->timer_work_queue =
3140 create_singlethread_workqueue(host_buf);
3141 if (!qedf->timer_work_queue) {
3142 QEDF_ERR(&(qedf->dbg_ctx), "Failed to start timer "
3143 "workqueue.\n");
3144 goto err7;
3145 }
3146
3147 /* DPC workqueue is not reaped during recovery unload */
3148 if (mode != QEDF_MODE_RECOVERY) {
3149 sprintf(host_buf, "qedf_%u_dpc",
3150 qedf->lport->host->host_no);
3151 qedf->dpc_wq = create_singlethread_workqueue(host_buf);
3152 }
3153
3154 /*
3155 * GRC dump and sysfs parameters are not reaped during the recovery
3156 * unload process.
3157 */
3158 if (mode != QEDF_MODE_RECOVERY) {
3159 qedf->grcdump_size = qed_ops->common->dbg_grc_size(qedf->cdev);
3160 if (qedf->grcdump_size) {
3161 rc = qedf_alloc_grc_dump_buf(&qedf->grcdump,
3162 qedf->grcdump_size);
3163 if (rc) {
3164 QEDF_ERR(&(qedf->dbg_ctx),
3165 "GRC Dump buffer alloc failed.\n");
3166 qedf->grcdump = NULL;
3167 }
3168
3169 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3170 "grcdump: addr=%p, size=%u.\n",
3171 qedf->grcdump, qedf->grcdump_size);
3172 }
3173 qedf_create_sysfs_ctx_attr(qedf);
3174
3175 /* Initialize I/O tracing for this adapter */
3176 spin_lock_init(&qedf->io_trace_lock);
3177 qedf->io_trace_idx = 0;
3178 }
3179
3180 init_completion(&qedf->flogi_compl);
3181
3182 memset(&link_params, 0, sizeof(struct qed_link_params));
3183 link_params.link_up = true;
3184 status = qed_ops->common->set_link(qedf->cdev, &link_params);
3185 if (status)
3186 QEDF_WARN(&(qedf->dbg_ctx), "set_link failed.\n");
3187
3188 /* Start/restart discovery */
3189 if (mode == QEDF_MODE_RECOVERY)
3190 fcoe_ctlr_link_up(&qedf->ctlr);
3191 else
3192 fc_fabric_login(lport);
3193
3194 /* All good */
3195 return 0;
3196
3197 err7:
3198 if (qedf->ll2_recv_wq)
3199 destroy_workqueue(qedf->ll2_recv_wq);
3200 fc_remove_host(qedf->lport->host);
3201 scsi_remove_host(qedf->lport->host);
3202 #ifdef CONFIG_DEBUG_FS
3203 qedf_dbg_host_exit(&(qedf->dbg_ctx));
3204 #endif
3205 err6:
3206 qedf_cmd_mgr_free(qedf->cmd_mgr);
3207 err5:
3208 qed_ops->stop(qedf->cdev);
3209 err4:
3210 qedf_free_fcoe_pf_param(qedf);
3211 qedf_sync_free_irqs(qedf);
3212 err3:
3213 qed_ops->common->slowpath_stop(qedf->cdev);
3214 err2:
3215 qed_ops->common->remove(qedf->cdev);
3216 err1:
3217 scsi_host_put(lport->host);
3218 err0:
3219 return rc;
3220 }
3221
3222 static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3223 {
3224 return __qedf_probe(pdev, QEDF_MODE_NORMAL);
3225 }
3226
3227 static void __qedf_remove(struct pci_dev *pdev, int mode)
3228 {
3229 struct qedf_ctx *qedf;
3230
3231 if (!pdev) {
3232 QEDF_ERR(NULL, "pdev is NULL.\n");
3233 return;
3234 }
3235
3236 qedf = pci_get_drvdata(pdev);
3237
3238 /*
3239 * Prevent race where we're in board disable work and then try to
3240 * rmmod the module.
3241 */
3242 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
3243 QEDF_ERR(&qedf->dbg_ctx, "Already removing PCI function.\n");
3244 return;
3245 }
3246
3247 if (mode != QEDF_MODE_RECOVERY)
3248 set_bit(QEDF_UNLOADING, &qedf->flags);
3249
3250 /* Logoff the fabric to upload all connections */
3251 if (mode == QEDF_MODE_RECOVERY)
3252 fcoe_ctlr_link_down(&qedf->ctlr);
3253 else
3254 fc_fabric_logoff(qedf->lport);
3255 qedf_wait_for_upload(qedf);
3256
3257 #ifdef CONFIG_DEBUG_FS
3258 qedf_dbg_host_exit(&(qedf->dbg_ctx));
3259 #endif
3260
3261 /* Stop any link update handling */
3262 cancel_delayed_work_sync(&qedf->link_update);
3263 destroy_workqueue(qedf->link_update_wq);
3264 qedf->link_update_wq = NULL;
3265
3266 if (qedf->timer_work_queue)
3267 destroy_workqueue(qedf->timer_work_queue);
3268
3269 /* Stop Light L2 */
3270 clear_bit(QEDF_LL2_STARTED, &qedf->flags);
3271 qed_ops->ll2->stop(qedf->cdev);
3272 if (qedf->ll2_recv_wq)
3273 destroy_workqueue(qedf->ll2_recv_wq);
3274
3275 /* Stop fastpath */
3276 qedf_sync_free_irqs(qedf);
3277 qedf_destroy_sb(qedf);
3278
3279 /*
3280 * During recovery don't destroy OS constructs that represent the
3281 * physical port.
3282 */
3283 if (mode != QEDF_MODE_RECOVERY) {
3284 qedf_free_grc_dump_buf(&qedf->grcdump);
3285 qedf_remove_sysfs_ctx_attr(qedf);
3286
3287 /* Remove all SCSI/libfc/libfcoe structures */
3288 fcoe_ctlr_destroy(&qedf->ctlr);
3289 fc_lport_destroy(qedf->lport);
3290 fc_remove_host(qedf->lport->host);
3291 scsi_remove_host(qedf->lport->host);
3292 }
3293
3294 qedf_cmd_mgr_free(qedf->cmd_mgr);
3295
3296 if (mode != QEDF_MODE_RECOVERY) {
3297 fc_exch_mgr_free(qedf->lport);
3298 fc_lport_free_stats(qedf->lport);
3299
3300 /* Wait for all vports to be reaped */
3301 qedf_wait_for_vport_destroy(qedf);
3302 }
3303
3304 /*
3305 * Now that all connections have been uploaded we can stop the
3306 * rest of the qed operations
3307 */
3308 qed_ops->stop(qedf->cdev);
3309
3310 if (mode != QEDF_MODE_RECOVERY) {
3311 if (qedf->dpc_wq) {
3312 /* Stop general DPC handling */
3313 destroy_workqueue(qedf->dpc_wq);
3314 qedf->dpc_wq = NULL;
3315 }
3316 }
3317
3318 /* Final shutdown for the board */
3319 qedf_free_fcoe_pf_param(qedf);
3320 if (mode != QEDF_MODE_RECOVERY) {
3321 qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3322 pci_set_drvdata(pdev, NULL);
3323 }
3324 qed_ops->common->slowpath_stop(qedf->cdev);
3325 qed_ops->common->remove(qedf->cdev);
3326
3327 mempool_destroy(qedf->io_mempool);
3328
3329 /* Only reap the Scsi_host on a real removal */
3330 if (mode != QEDF_MODE_RECOVERY)
3331 scsi_host_put(qedf->lport->host);
3332 }
3333
3334 static void qedf_remove(struct pci_dev *pdev)
3335 {
3336 /* Check to make sure this function wasn't already disabled */
3337 if (!atomic_read(&pdev->enable_cnt))
3338 return;
3339
3340 __qedf_remove(pdev, QEDF_MODE_NORMAL);
3341 }
3342
3343 /*
3344 * Module Init/Remove
3345 */
3346
3347 static int __init qedf_init(void)
3348 {
3349 int ret;
3350
3351 /* If debug=1 passed, set the default log mask */
3352 if (qedf_debug == QEDF_LOG_DEFAULT)
3353 qedf_debug = QEDF_DEFAULT_LOG_MASK;
3354
3355 /* Print driver banner */
3356 QEDF_INFO(NULL, QEDF_LOG_INFO, "%s v%s.\n", QEDF_DESCR,
3357 QEDF_VERSION);
3358
3359 /* Create kmem_cache for qedf_io_work structs */
3360 qedf_io_work_cache = kmem_cache_create("qedf_io_work_cache",
3361 sizeof(struct qedf_io_work), 0, SLAB_HWCACHE_ALIGN, NULL);
3362 if (qedf_io_work_cache == NULL) {
3363 QEDF_ERR(NULL, "qedf_io_work_cache is NULL.\n");
3364 goto err1;
3365 }
3366 QEDF_INFO(NULL, QEDF_LOG_DISC, "qedf_io_work_cache=%p.\n",
3367 qedf_io_work_cache);
3368
3369 qed_ops = qed_get_fcoe_ops();
3370 if (!qed_ops) {
3371 QEDF_ERR(NULL, "Failed to get qed fcoe operations\n");
3372 goto err1;
3373 }
3374
3375 #ifdef CONFIG_DEBUG_FS
3376 qedf_dbg_init("qedf");
3377 #endif
3378
3379 qedf_fc_transport_template =
3380 fc_attach_transport(&qedf_fc_transport_fn);
3381 if (!qedf_fc_transport_template) {
3382 QEDF_ERR(NULL, "Could not register with FC transport\n");
3383 goto err2;
3384 }
3385
3386 qedf_fc_vport_transport_template =
3387 fc_attach_transport(&qedf_fc_vport_transport_fn);
3388 if (!qedf_fc_vport_transport_template) {
3389 QEDF_ERR(NULL, "Could not register vport template with FC "
3390 "transport\n");
3391 goto err3;
3392 }
3393
3394 qedf_io_wq = create_workqueue("qedf_io_wq");
3395 if (!qedf_io_wq) {
3396 QEDF_ERR(NULL, "Could not create qedf_io_wq.\n");
3397 goto err4;
3398 }
3399
3400 qedf_cb_ops.get_login_failures = qedf_get_login_failures;
3401
3402 ret = pci_register_driver(&qedf_pci_driver);
3403 if (ret) {
3404 QEDF_ERR(NULL, "Failed to register driver\n");
3405 goto err5;
3406 }
3407
3408 return 0;
3409
3410 err5:
3411 destroy_workqueue(qedf_io_wq);
3412 err4:
3413 fc_release_transport(qedf_fc_vport_transport_template);
3414 err3:
3415 fc_release_transport(qedf_fc_transport_template);
3416 err2:
3417 #ifdef CONFIG_DEBUG_FS
3418 qedf_dbg_exit();
3419 #endif
3420 qed_put_fcoe_ops();
3421 err1:
3422 return -EINVAL;
3423 }
3424
3425 static void __exit qedf_cleanup(void)
3426 {
3427 pci_unregister_driver(&qedf_pci_driver);
3428
3429 destroy_workqueue(qedf_io_wq);
3430
3431 fc_release_transport(qedf_fc_vport_transport_template);
3432 fc_release_transport(qedf_fc_transport_template);
3433 #ifdef CONFIG_DEBUG_FS
3434 qedf_dbg_exit();
3435 #endif
3436 qed_put_fcoe_ops();
3437
3438 kmem_cache_destroy(qedf_io_work_cache);
3439 }
3440
3441 MODULE_LICENSE("GPL");
3442 MODULE_DESCRIPTION("QLogic QEDF 25/40/50/100Gb FCoE Driver");
3443 MODULE_AUTHOR("QLogic Corporation");
3444 MODULE_VERSION(QEDF_VERSION);
3445 module_init(qedf_init);
3446 module_exit(qedf_cleanup);
Linux with added FPC-III support