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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / qedf / qedf_main.c
blob604856e72cfbe6475a1dcf731e3aaa32de3741c9
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic FCoE Offload Driver
4 * Copyright (c) 2016-2018 Cavium Inc.
5 */
6 #include <linux/init.h>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/pci.h>
10 #include <linux/device.h>
11 #include <linux/highmem.h>
12 #include <linux/crc32.h>
13 #include <linux/interrupt.h>
14 #include <linux/list.h>
15 #include <linux/kthread.h>
16 #include <scsi/libfc.h>
17 #include <scsi/scsi_host.h>
18 #include <scsi/fc_frame.h>
19 #include <linux/if_ether.h>
20 #include <linux/if_vlan.h>
21 #include <linux/cpu.h>
22 #include "qedf.h"
23 #include "qedf_dbg.h"
24 #include <uapi/linux/pci_regs.h>
25
26 const struct qed_fcoe_ops *qed_ops;
27
28 static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id);
29 static void qedf_remove(struct pci_dev *pdev);
30 static void qedf_shutdown(struct pci_dev *pdev);
31
32 /*
33 * Driver module parameters.
34 */
35 static unsigned int qedf_dev_loss_tmo = 60;
36 module_param_named(dev_loss_tmo, qedf_dev_loss_tmo, int, S_IRUGO);
37 MODULE_PARM_DESC(dev_loss_tmo, " dev_loss_tmo setting for attached "
38 "remote ports (default 60)");
39
40 uint qedf_debug = QEDF_LOG_INFO;
41 module_param_named(debug, qedf_debug, uint, S_IRUGO);
42 MODULE_PARM_DESC(debug, " Debug mask. Pass '1' to enable default debugging"
43 " mask");
44
45 static uint qedf_fipvlan_retries = 60;
46 module_param_named(fipvlan_retries, qedf_fipvlan_retries, int, S_IRUGO);
47 MODULE_PARM_DESC(fipvlan_retries, " Number of FIP VLAN requests to attempt "
48 "before giving up (default 60)");
49
50 static uint qedf_fallback_vlan = QEDF_FALLBACK_VLAN;
51 module_param_named(fallback_vlan, qedf_fallback_vlan, int, S_IRUGO);
52 MODULE_PARM_DESC(fallback_vlan, " VLAN ID to try if fip vlan request fails "
53 "(default 1002).");
54
55 static int qedf_default_prio = -1;
56 module_param_named(default_prio, qedf_default_prio, int, S_IRUGO);
57 MODULE_PARM_DESC(default_prio, " Override 802.1q priority for FIP and FCoE"
58 " traffic (value between 0 and 7, default 3).");
59
60 uint qedf_dump_frames;
61 module_param_named(dump_frames, qedf_dump_frames, int, S_IRUGO | S_IWUSR);
62 MODULE_PARM_DESC(dump_frames, " Print the skb data of FIP and FCoE frames "
63 "(default off)");
64
65 static uint qedf_queue_depth;
66 module_param_named(queue_depth, qedf_queue_depth, int, S_IRUGO);
67 MODULE_PARM_DESC(queue_depth, " Sets the queue depth for all LUNs discovered "
68 "by the qedf driver. Default is 0 (use OS default).");
69
70 uint qedf_io_tracing;
71 module_param_named(io_tracing, qedf_io_tracing, int, S_IRUGO | S_IWUSR);
72 MODULE_PARM_DESC(io_tracing, " Enable logging of SCSI requests/completions "
73 "into trace buffer. (default off).");
74
75 static uint qedf_max_lun = MAX_FIBRE_LUNS;
76 module_param_named(max_lun, qedf_max_lun, int, S_IRUGO);
77 MODULE_PARM_DESC(max_lun, " Sets the maximum luns per target that the driver "
78 "supports. (default 0xffffffff)");
79
80 uint qedf_link_down_tmo;
81 module_param_named(link_down_tmo, qedf_link_down_tmo, int, S_IRUGO);
82 MODULE_PARM_DESC(link_down_tmo, " Delays informing the fcoe transport that the "
83 "link is down by N seconds.");
84
85 bool qedf_retry_delay;
86 module_param_named(retry_delay, qedf_retry_delay, bool, S_IRUGO | S_IWUSR);
87 MODULE_PARM_DESC(retry_delay, " Enable/disable handling of FCP_RSP IU retry "
88 "delay handling (default off).");
89
90 static bool qedf_dcbx_no_wait;
91 module_param_named(dcbx_no_wait, qedf_dcbx_no_wait, bool, S_IRUGO | S_IWUSR);
92 MODULE_PARM_DESC(dcbx_no_wait, " Do not wait for DCBX convergence to start "
93 "sending FIP VLAN requests on link up (Default: off).");
94
95 static uint qedf_dp_module;
96 module_param_named(dp_module, qedf_dp_module, uint, S_IRUGO);
97 MODULE_PARM_DESC(dp_module, " bit flags control for verbose printk passed "
98 "qed module during probe.");
99
100 static uint qedf_dp_level = QED_LEVEL_NOTICE;
101 module_param_named(dp_level, qedf_dp_level, uint, S_IRUGO);
102 MODULE_PARM_DESC(dp_level, " printk verbosity control passed to qed module "
103 "during probe (0-3: 0 more verbose).");
104
105 struct workqueue_struct *qedf_io_wq;
106
107 static struct fcoe_percpu_s qedf_global;
108 static DEFINE_SPINLOCK(qedf_global_lock);
109
110 static struct kmem_cache *qedf_io_work_cache;
111
112 void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id)
113 {
114 int vlan_id_tmp = 0;
115
116 vlan_id_tmp = vlan_id | (qedf->prio << VLAN_PRIO_SHIFT);
117 qedf->vlan_id = vlan_id_tmp;
118 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
119 "Setting vlan_id=0x%04x prio=%d.\n",
120 vlan_id_tmp, qedf->prio);
121 }
122
123 /* Returns true if we have a valid vlan, false otherwise */
124 static bool qedf_initiate_fipvlan_req(struct qedf_ctx *qedf)
125 {
126
127 while (qedf->fipvlan_retries--) {
128 /* This is to catch if link goes down during fipvlan retries */
129 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
130 QEDF_ERR(&qedf->dbg_ctx, "Link not up.\n");
131 return false;
132 }
133
134 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
135 QEDF_ERR(&qedf->dbg_ctx, "Driver unloading.\n");
136 return false;
137 }
138
139 if (qedf->vlan_id > 0) {
140 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
141 "vlan = 0x%x already set, calling ctlr_link_up.\n",
142 qedf->vlan_id);
143 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP)
144 fcoe_ctlr_link_up(&qedf->ctlr);
145 return true;
146 }
147
148 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
149 "Retry %d.\n", qedf->fipvlan_retries);
150 init_completion(&qedf->fipvlan_compl);
151 qedf_fcoe_send_vlan_req(qedf);
152 wait_for_completion_timeout(&qedf->fipvlan_compl, 1 * HZ);
153 }
154
155 return false;
156 }
157
158 static void qedf_handle_link_update(struct work_struct *work)
159 {
160 struct qedf_ctx *qedf =
161 container_of(work, struct qedf_ctx, link_update.work);
162 int rc;
163
164 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC, "Entered. link_state=%d.\n",
165 atomic_read(&qedf->link_state));
166
167 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
168 rc = qedf_initiate_fipvlan_req(qedf);
169 if (rc)
170 return;
171
172 if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
173 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
174 "Link is down, resetting vlan_id.\n");
175 qedf->vlan_id = 0;
176 return;
177 }
178
179 /*
180 * If we get here then we never received a repsonse to our
181 * fip vlan request so set the vlan_id to the default and
182 * tell FCoE that the link is up
183 */
184 QEDF_WARN(&(qedf->dbg_ctx), "Did not receive FIP VLAN "
185 "response, falling back to default VLAN %d.\n",
186 qedf_fallback_vlan);
187 qedf_set_vlan_id(qedf, qedf_fallback_vlan);
188
189 /*
190 * Zero out data_src_addr so we'll update it with the new
191 * lport port_id
192 */
193 eth_zero_addr(qedf->data_src_addr);
194 fcoe_ctlr_link_up(&qedf->ctlr);
195 } else if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
196 /*
197 * If we hit here and link_down_tmo_valid is still 1 it means
198 * that link_down_tmo timed out so set it to 0 to make sure any
199 * other readers have accurate state.
200 */
201 atomic_set(&qedf->link_down_tmo_valid, 0);
202 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
203 "Calling fcoe_ctlr_link_down().\n");
204 fcoe_ctlr_link_down(&qedf->ctlr);
205 if (qedf_wait_for_upload(qedf) == false)
206 QEDF_ERR(&qedf->dbg_ctx,
207 "Could not upload all sessions.\n");
208 /* Reset the number of FIP VLAN retries */
209 qedf->fipvlan_retries = qedf_fipvlan_retries;
210 }
211 }
212
213 #define QEDF_FCOE_MAC_METHOD_GRANGED_MAC 1
214 #define QEDF_FCOE_MAC_METHOD_FCF_MAP 2
215 #define QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC 3
216 static void qedf_set_data_src_addr(struct qedf_ctx *qedf, struct fc_frame *fp)
217 {
218 u8 *granted_mac;
219 struct fc_frame_header *fh = fc_frame_header_get(fp);
220 u8 fc_map[3];
221 int method = 0;
222
223 /* Get granted MAC address from FIP FLOGI payload */
224 granted_mac = fr_cb(fp)->granted_mac;
225
226 /*
227 * We set the source MAC for FCoE traffic based on the Granted MAC
228 * address from the switch.
229 *
230 * If granted_mac is non-zero, we used that.
231 * If the granted_mac is zeroed out, created the FCoE MAC based on
232 * the sel_fcf->fc_map and the d_id fo the FLOGI frame.
233 * If sel_fcf->fc_map is 0 then we use the default FCF-MAC plus the
234 * d_id of the FLOGI frame.
235 */
236 if (!is_zero_ether_addr(granted_mac)) {
237 ether_addr_copy(qedf->data_src_addr, granted_mac);
238 method = QEDF_FCOE_MAC_METHOD_GRANGED_MAC;
239 } else if (qedf->ctlr.sel_fcf->fc_map != 0) {
240 hton24(fc_map, qedf->ctlr.sel_fcf->fc_map);
241 qedf->data_src_addr[0] = fc_map[0];
242 qedf->data_src_addr[1] = fc_map[1];
243 qedf->data_src_addr[2] = fc_map[2];
244 qedf->data_src_addr[3] = fh->fh_d_id[0];
245 qedf->data_src_addr[4] = fh->fh_d_id[1];
246 qedf->data_src_addr[5] = fh->fh_d_id[2];
247 method = QEDF_FCOE_MAC_METHOD_FCF_MAP;
248 } else {
249 fc_fcoe_set_mac(qedf->data_src_addr, fh->fh_d_id);
250 method = QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC;
251 }
252
253 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
254 "QEDF data_src_mac=%pM method=%d.\n", qedf->data_src_addr, method);
255 }
256
257 static void qedf_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
258 void *arg)
259 {
260 struct fc_exch *exch = fc_seq_exch(seq);
261 struct fc_lport *lport = exch->lp;
262 struct qedf_ctx *qedf = lport_priv(lport);
263
264 if (!qedf) {
265 QEDF_ERR(NULL, "qedf is NULL.\n");
266 return;
267 }
268
269 /*
270 * If ERR_PTR is set then don't try to stat anything as it will cause
271 * a crash when we access fp.
272 */
273 if (IS_ERR(fp)) {
274 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
275 "fp has IS_ERR() set.\n");
276 goto skip_stat;
277 }
278
279 /* Log stats for FLOGI reject */
280 if (fc_frame_payload_op(fp) == ELS_LS_RJT)
281 qedf->flogi_failed++;
282 else if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
283 /* Set the source MAC we will use for FCoE traffic */
284 qedf_set_data_src_addr(qedf, fp);
285 }
286
287 /* Complete flogi_compl so we can proceed to sending ADISCs */
288 complete(&qedf->flogi_compl);
289
290 skip_stat:
291 /* Report response to libfc */
292 fc_lport_flogi_resp(seq, fp, lport);
293 }
294
295 static struct fc_seq *qedf_elsct_send(struct fc_lport *lport, u32 did,
296 struct fc_frame *fp, unsigned int op,
297 void (*resp)(struct fc_seq *,
298 struct fc_frame *,
299 void *),
300 void *arg, u32 timeout)
301 {
302 struct qedf_ctx *qedf = lport_priv(lport);
303
304 /*
305 * Intercept FLOGI for statistic purposes. Note we use the resp
306 * callback to tell if this is really a flogi.
307 */
308 if (resp == fc_lport_flogi_resp) {
309 qedf->flogi_cnt++;
310 return fc_elsct_send(lport, did, fp, op, qedf_flogi_resp,
311 arg, timeout);
312 }
313
314 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
315 }
316
317 int qedf_send_flogi(struct qedf_ctx *qedf)
318 {
319 struct fc_lport *lport;
320 struct fc_frame *fp;
321
322 lport = qedf->lport;
323
324 if (!lport->tt.elsct_send) {
325 QEDF_ERR(&qedf->dbg_ctx, "tt.elsct_send not set.\n");
326 return -EINVAL;
327 }
328
329 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
330 if (!fp) {
331 QEDF_ERR(&(qedf->dbg_ctx), "fc_frame_alloc failed.\n");
332 return -ENOMEM;
333 }
334
335 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
336 "Sending FLOGI to reestablish session with switch.\n");
337 lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
338 ELS_FLOGI, qedf_flogi_resp, lport, lport->r_a_tov);
339
340 init_completion(&qedf->flogi_compl);
341
342 return 0;
343 }
344
345 /*
346 * This function is called if link_down_tmo is in use. If we get a link up and
347 * link_down_tmo has not expired then use just FLOGI/ADISC to recover our
348 * sessions with targets. Otherwise, just call fcoe_ctlr_link_up().
349 */
350 static void qedf_link_recovery(struct work_struct *work)
351 {
352 struct qedf_ctx *qedf =
353 container_of(work, struct qedf_ctx, link_recovery.work);
354 struct fc_lport *lport = qedf->lport;
355 struct fc_rport_priv *rdata;
356 bool rc;
357 int retries = 30;
358 int rval, i;
359 struct list_head rdata_login_list;
360
361 INIT_LIST_HEAD(&rdata_login_list);
362
363 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
364 "Link down tmo did not expire.\n");
365
366 /*
367 * Essentially reset the fcoe_ctlr here without affecting the state
368 * of the libfc structs.
369 */
370 qedf->ctlr.state = FIP_ST_LINK_WAIT;
371 fcoe_ctlr_link_down(&qedf->ctlr);
372
373 /*
374 * Bring the link up before we send the fipvlan request so libfcoe
375 * can select a new fcf in parallel
376 */
377 fcoe_ctlr_link_up(&qedf->ctlr);
378
379 /* Since the link when down and up to verify which vlan we're on */
380 qedf->fipvlan_retries = qedf_fipvlan_retries;
381 rc = qedf_initiate_fipvlan_req(qedf);
382 /* If getting the VLAN fails, set the VLAN to the fallback one */
383 if (!rc)
384 qedf_set_vlan_id(qedf, qedf_fallback_vlan);
385
386 /*
387 * We need to wait for an FCF to be selected due to the
388 * fcoe_ctlr_link_up other the FLOGI will be rejected.
389 */
390 while (retries > 0) {
391 if (qedf->ctlr.sel_fcf) {
392 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
393 "FCF reselected, proceeding with FLOGI.\n");
394 break;
395 }
396 msleep(500);
397 retries--;
398 }
399
400 if (retries < 1) {
401 QEDF_ERR(&(qedf->dbg_ctx), "Exhausted retries waiting for "
402 "FCF selection.\n");
403 return;
404 }
405
406 rval = qedf_send_flogi(qedf);
407 if (rval)
408 return;
409
410 /* Wait for FLOGI completion before proceeding with sending ADISCs */
411 i = wait_for_completion_timeout(&qedf->flogi_compl,
412 qedf->lport->r_a_tov);
413 if (i == 0) {
414 QEDF_ERR(&(qedf->dbg_ctx), "FLOGI timed out.\n");
415 return;
416 }
417
418 /*
419 * Call lport->tt.rport_login which will cause libfc to send an
420 * ADISC since the rport is in state ready.
421 */
422 mutex_lock(&lport->disc.disc_mutex);
423 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
424 if (kref_get_unless_zero(&rdata->kref)) {
425 fc_rport_login(rdata);
426 kref_put(&rdata->kref, fc_rport_destroy);
427 }
428 }
429 mutex_unlock(&lport->disc.disc_mutex);
430 }
431
432 static void qedf_update_link_speed(struct qedf_ctx *qedf,
433 struct qed_link_output *link)
434 {
435 struct fc_lport *lport = qedf->lport;
436
437 lport->link_speed = FC_PORTSPEED_UNKNOWN;
438 lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
439
440 /* Set fc_host link speed */
441 switch (link->speed) {
442 case 10000:
443 lport->link_speed = FC_PORTSPEED_10GBIT;
444 break;
445 case 25000:
446 lport->link_speed = FC_PORTSPEED_25GBIT;
447 break;
448 case 40000:
449 lport->link_speed = FC_PORTSPEED_40GBIT;
450 break;
451 case 50000:
452 lport->link_speed = FC_PORTSPEED_50GBIT;
453 break;
454 case 100000:
455 lport->link_speed = FC_PORTSPEED_100GBIT;
456 break;
457 case 20000:
458 lport->link_speed = FC_PORTSPEED_20GBIT;
459 break;
460 default:
461 lport->link_speed = FC_PORTSPEED_UNKNOWN;
462 break;
463 }
464
465 /*
466 * Set supported link speed by querying the supported
467 * capabilities of the link.
468 */
469 if ((link->supported_caps & QED_LM_10000baseT_Full_BIT) ||
470 (link->supported_caps & QED_LM_10000baseKX4_Full_BIT) ||
471 (link->supported_caps & QED_LM_10000baseR_FEC_BIT) ||
472 (link->supported_caps & QED_LM_10000baseCR_Full_BIT) ||
473 (link->supported_caps & QED_LM_10000baseSR_Full_BIT) ||
474 (link->supported_caps & QED_LM_10000baseLR_Full_BIT) ||
475 (link->supported_caps & QED_LM_10000baseLRM_Full_BIT) ||
476 (link->supported_caps & QED_LM_10000baseKR_Full_BIT)) {
477 lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
478 }
479 if ((link->supported_caps & QED_LM_25000baseKR_Full_BIT) ||
480 (link->supported_caps & QED_LM_25000baseCR_Full_BIT) ||
481 (link->supported_caps & QED_LM_25000baseSR_Full_BIT)) {
482 lport->link_supported_speeds |= FC_PORTSPEED_25GBIT;
483 }
484 if ((link->supported_caps & QED_LM_40000baseLR4_Full_BIT) ||
485 (link->supported_caps & QED_LM_40000baseKR4_Full_BIT) ||
486 (link->supported_caps & QED_LM_40000baseCR4_Full_BIT) ||
487 (link->supported_caps & QED_LM_40000baseSR4_Full_BIT)) {
488 lport->link_supported_speeds |= FC_PORTSPEED_40GBIT;
489 }
490 if ((link->supported_caps & QED_LM_50000baseKR2_Full_BIT) ||
491 (link->supported_caps & QED_LM_50000baseCR2_Full_BIT) ||
492 (link->supported_caps & QED_LM_50000baseSR2_Full_BIT)) {
493 lport->link_supported_speeds |= FC_PORTSPEED_50GBIT;
494 }
495 if ((link->supported_caps & QED_LM_100000baseKR4_Full_BIT) ||
496 (link->supported_caps & QED_LM_100000baseSR4_Full_BIT) ||
497 (link->supported_caps & QED_LM_100000baseCR4_Full_BIT) ||
498 (link->supported_caps & QED_LM_100000baseLR4_ER4_Full_BIT)) {
499 lport->link_supported_speeds |= FC_PORTSPEED_100GBIT;
500 }
501 if (link->supported_caps & QED_LM_20000baseKR2_Full_BIT)
502 lport->link_supported_speeds |= FC_PORTSPEED_20GBIT;
503 fc_host_supported_speeds(lport->host) = lport->link_supported_speeds;
504 }
505
506 static void qedf_link_update(void *dev, struct qed_link_output *link)
507 {
508 struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
509
510 /*
511 * Prevent race where we're removing the module and we get link update
512 * for qed.
513 */
514 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
515 QEDF_ERR(&qedf->dbg_ctx,
516 "Ignore link update, driver getting unload.\n");
517 return;
518 }
519
520 if (link->link_up) {
521 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
522 QEDF_INFO((&qedf->dbg_ctx), QEDF_LOG_DISC,
523 "Ignoring link up event as link is already up.\n");
524 return;
525 }
526 QEDF_ERR(&(qedf->dbg_ctx), "LINK UP (%d GB/s).\n",
527 link->speed / 1000);
528
529 /* Cancel any pending link down work */
530 cancel_delayed_work(&qedf->link_update);
531
532 atomic_set(&qedf->link_state, QEDF_LINK_UP);
533 qedf_update_link_speed(qedf, link);
534
535 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE ||
536 qedf_dcbx_no_wait) {
537 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
538 "DCBx done.\n");
539 if (atomic_read(&qedf->link_down_tmo_valid) > 0)
540 queue_delayed_work(qedf->link_update_wq,
541 &qedf->link_recovery, 0);
542 else
543 queue_delayed_work(qedf->link_update_wq,
544 &qedf->link_update, 0);
545 atomic_set(&qedf->link_down_tmo_valid, 0);
546 }
547
548 } else {
549 QEDF_ERR(&(qedf->dbg_ctx), "LINK DOWN.\n");
550
551 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
552 atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
553 /*
554 * Flag that we're waiting for the link to come back up before
555 * informing the fcoe layer of the event.
556 */
557 if (qedf_link_down_tmo > 0) {
558 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
559 "Starting link down tmo.\n");
560 atomic_set(&qedf->link_down_tmo_valid, 1);
561 }
562 qedf->vlan_id = 0;
563 qedf_update_link_speed(qedf, link);
564 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
565 qedf_link_down_tmo * HZ);
566 }
567 }
568
569
570 static void qedf_dcbx_handler(void *dev, struct qed_dcbx_get *get, u32 mib_type)
571 {
572 struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
573 u8 tmp_prio;
574
575 QEDF_ERR(&(qedf->dbg_ctx), "DCBx event valid=%d enabled=%d fcoe "
576 "prio=%d.\n", get->operational.valid, get->operational.enabled,
577 get->operational.app_prio.fcoe);
578
579 if (get->operational.enabled && get->operational.valid) {
580 /* If DCBX was already negotiated on link up then just exit */
581 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
582 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
583 "DCBX already set on link up.\n");
584 return;
585 }
586
587 atomic_set(&qedf->dcbx, QEDF_DCBX_DONE);
588
589 /*
590 * Set the 8021q priority in the following manner:
591 *
592 * 1. If a modparam is set use that
593 * 2. If the value is not between 0..7 use the default
594 * 3. Use the priority we get from the DCBX app tag
595 */
596 tmp_prio = get->operational.app_prio.fcoe;
597 if (qedf_default_prio > -1)
598 qedf->prio = qedf_default_prio;
599 else if (tmp_prio > 7) {
600 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
601 "FIP/FCoE prio %d out of range, setting to %d.\n",
602 tmp_prio, QEDF_DEFAULT_PRIO);
603 qedf->prio = QEDF_DEFAULT_PRIO;
604 } else
605 qedf->prio = tmp_prio;
606
607 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP &&
608 !qedf_dcbx_no_wait) {
609 if (atomic_read(&qedf->link_down_tmo_valid) > 0)
610 queue_delayed_work(qedf->link_update_wq,
611 &qedf->link_recovery, 0);
612 else
613 queue_delayed_work(qedf->link_update_wq,
614 &qedf->link_update, 0);
615 atomic_set(&qedf->link_down_tmo_valid, 0);
616 }
617 }
618
619 }
620
621 static u32 qedf_get_login_failures(void *cookie)
622 {
623 struct qedf_ctx *qedf;
624
625 qedf = (struct qedf_ctx *)cookie;
626 return qedf->flogi_failed;
627 }
628
629 static struct qed_fcoe_cb_ops qedf_cb_ops = {
630 {
631 .link_update = qedf_link_update,
632 .dcbx_aen = qedf_dcbx_handler,
633 .get_generic_tlv_data = qedf_get_generic_tlv_data,
634 .get_protocol_tlv_data = qedf_get_protocol_tlv_data,
635 }
636 };
637
638 /*
639 * Various transport templates.
640 */
641
642 static struct scsi_transport_template *qedf_fc_transport_template;
643 static struct scsi_transport_template *qedf_fc_vport_transport_template;
644
645 /*
646 * SCSI EH handlers
647 */
648 static int qedf_eh_abort(struct scsi_cmnd *sc_cmd)
649 {
650 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
651 struct fc_lport *lport;
652 struct qedf_ctx *qedf;
653 struct qedf_ioreq *io_req;
654 struct fc_rport_libfc_priv *rp = rport->dd_data;
655 struct fc_rport_priv *rdata;
656 struct qedf_rport *fcport = NULL;
657 int rc = FAILED;
658 int wait_count = 100;
659 int refcount = 0;
660 int rval;
661 int got_ref = 0;
662
663 lport = shost_priv(sc_cmd->device->host);
664 qedf = (struct qedf_ctx *)lport_priv(lport);
665
666 /* rport and tgt are allocated together, so tgt should be non-NULL */
667 fcport = (struct qedf_rport *)&rp[1];
668 rdata = fcport->rdata;
669 if (!rdata || !kref_get_unless_zero(&rdata->kref)) {
670 QEDF_ERR(&qedf->dbg_ctx, "stale rport, sc_cmd=%p\n", sc_cmd);
671 rc = 1;
672 goto out;
673 }
674
675
676 io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr;
677 if (!io_req) {
678 QEDF_ERR(&qedf->dbg_ctx,
679 "sc_cmd not queued with lld, sc_cmd=%p op=0x%02x, port_id=%06x\n",
680 sc_cmd, sc_cmd->cmnd[0],
681 rdata->ids.port_id);
682 rc = SUCCESS;
683 goto drop_rdata_kref;
684 }
685
686 rval = kref_get_unless_zero(&io_req->refcount); /* ID: 005 */
687 if (rval)
688 got_ref = 1;
689
690 /* If we got a valid io_req, confirm it belongs to this sc_cmd. */
691 if (!rval || io_req->sc_cmd != sc_cmd) {
692 QEDF_ERR(&qedf->dbg_ctx,
693 "Freed/Incorrect io_req, io_req->sc_cmd=%p, sc_cmd=%p, port_id=%06x, bailing out.\n",
694 io_req->sc_cmd, sc_cmd, rdata->ids.port_id);
695
696 goto drop_rdata_kref;
697 }
698
699 if (fc_remote_port_chkready(rport)) {
700 refcount = kref_read(&io_req->refcount);
701 QEDF_ERR(&qedf->dbg_ctx,
702 "rport not ready, io_req=%p, xid=0x%x sc_cmd=%p op=0x%02x, refcount=%d, port_id=%06x\n",
703 io_req, io_req->xid, sc_cmd, sc_cmd->cmnd[0],
704 refcount, rdata->ids.port_id);
705
706 goto drop_rdata_kref;
707 }
708
709 rc = fc_block_scsi_eh(sc_cmd);
710 if (rc)
711 goto drop_rdata_kref;
712
713 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
714 QEDF_ERR(&qedf->dbg_ctx,
715 "Connection uploading, xid=0x%x., port_id=%06x\n",
716 io_req->xid, rdata->ids.port_id);
717 while (io_req->sc_cmd && (wait_count != 0)) {
718 msleep(100);
719 wait_count--;
720 }
721 if (wait_count) {
722 QEDF_ERR(&qedf->dbg_ctx, "ABTS succeeded\n");
723 rc = SUCCESS;
724 } else {
725 QEDF_ERR(&qedf->dbg_ctx, "ABTS failed\n");
726 rc = FAILED;
727 }
728 goto drop_rdata_kref;
729 }
730
731 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
732 QEDF_ERR(&qedf->dbg_ctx, "link not ready.\n");
733 goto drop_rdata_kref;
734 }
735
736 QEDF_ERR(&qedf->dbg_ctx,
737 "Aborting io_req=%p sc_cmd=%p xid=0x%x fp_idx=%d, port_id=%06x.\n",
738 io_req, sc_cmd, io_req->xid, io_req->fp_idx,
739 rdata->ids.port_id);
740
741 if (qedf->stop_io_on_error) {
742 qedf_stop_all_io(qedf);
743 rc = SUCCESS;
744 goto drop_rdata_kref;
745 }
746
747 init_completion(&io_req->abts_done);
748 rval = qedf_initiate_abts(io_req, true);
749 if (rval) {
750 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
751 /*
752 * If we fail to queue the ABTS then return this command to
753 * the SCSI layer as it will own and free the xid
754 */
755 rc = SUCCESS;
756 qedf_scsi_done(qedf, io_req, DID_ERROR);
757 goto drop_rdata_kref;
758 }
759
760 wait_for_completion(&io_req->abts_done);
761
762 if (io_req->event == QEDF_IOREQ_EV_ABORT_SUCCESS ||
763 io_req->event == QEDF_IOREQ_EV_ABORT_FAILED ||
764 io_req->event == QEDF_IOREQ_EV_CLEANUP_SUCCESS) {
765 /*
766 * If we get a reponse to the abort this is success from
767 * the perspective that all references to the command have
768 * been removed from the driver and firmware
769 */
770 rc = SUCCESS;
771 } else {
772 /* If the abort and cleanup failed then return a failure */
773 rc = FAILED;
774 }
775
776 if (rc == SUCCESS)
777 QEDF_ERR(&(qedf->dbg_ctx), "ABTS succeeded, xid=0x%x.\n",
778 io_req->xid);
779 else
780 QEDF_ERR(&(qedf->dbg_ctx), "ABTS failed, xid=0x%x.\n",
781 io_req->xid);
782
783 drop_rdata_kref:
784 kref_put(&rdata->kref, fc_rport_destroy);
785 out:
786 if (got_ref)
787 kref_put(&io_req->refcount, qedf_release_cmd);
788 return rc;
789 }
790
791 static int qedf_eh_target_reset(struct scsi_cmnd *sc_cmd)
792 {
793 QEDF_ERR(NULL, "%d:0:%d:%lld: TARGET RESET Issued...",
794 sc_cmd->device->host->host_no, sc_cmd->device->id,
795 sc_cmd->device->lun);
796 return qedf_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
797 }
798
799 static int qedf_eh_device_reset(struct scsi_cmnd *sc_cmd)
800 {
801 QEDF_ERR(NULL, "%d:0:%d:%lld: LUN RESET Issued... ",
802 sc_cmd->device->host->host_no, sc_cmd->device->id,
803 sc_cmd->device->lun);
804 return qedf_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
805 }
806
807 bool qedf_wait_for_upload(struct qedf_ctx *qedf)
808 {
809 struct qedf_rport *fcport = NULL;
810 int wait_cnt = 120;
811
812 while (wait_cnt--) {
813 if (atomic_read(&qedf->num_offloads))
814 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
815 "Waiting for all uploads to complete num_offloads = 0x%x.\n",
816 atomic_read(&qedf->num_offloads));
817 else
818 return true;
819 msleep(500);
820 }
821
822 rcu_read_lock();
823 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
824 if (fcport && test_bit(QEDF_RPORT_SESSION_READY,
825 &fcport->flags)) {
826 if (fcport->rdata)
827 QEDF_ERR(&qedf->dbg_ctx,
828 "Waiting for fcport %p portid=%06x.\n",
829 fcport, fcport->rdata->ids.port_id);
830 } else {
831 QEDF_ERR(&qedf->dbg_ctx,
832 "Waiting for fcport %p.\n", fcport);
833 }
834 }
835 rcu_read_unlock();
836 return false;
837
838 }
839
840 /* Performs soft reset of qedf_ctx by simulating a link down/up */
841 void qedf_ctx_soft_reset(struct fc_lport *lport)
842 {
843 struct qedf_ctx *qedf;
844 struct qed_link_output if_link;
845
846 if (lport->vport) {
847 QEDF_ERR(NULL, "Cannot issue host reset on NPIV port.\n");
848 return;
849 }
850
851 qedf = lport_priv(lport);
852
853 /* For host reset, essentially do a soft link up/down */
854 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
855 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
856 "Queuing link down work.\n");
857 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
858 0);
859
860 if (qedf_wait_for_upload(qedf) == false) {
861 QEDF_ERR(&qedf->dbg_ctx, "Could not upload all sessions.\n");
862 WARN_ON(atomic_read(&qedf->num_offloads));
863 }
864
865 /* Before setting link up query physical link state */
866 qed_ops->common->get_link(qedf->cdev, &if_link);
867 /* Bail if the physical link is not up */
868 if (!if_link.link_up) {
869 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
870 "Physical link is not up.\n");
871 return;
872 }
873 /* Flush and wait to make sure link down is processed */
874 flush_delayed_work(&qedf->link_update);
875 msleep(500);
876
877 atomic_set(&qedf->link_state, QEDF_LINK_UP);
878 qedf->vlan_id = 0;
879 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
880 "Queue link up work.\n");
881 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
882 0);
883 }
884
885 /* Reset the host by gracefully logging out and then logging back in */
886 static int qedf_eh_host_reset(struct scsi_cmnd *sc_cmd)
887 {
888 struct fc_lport *lport;
889 struct qedf_ctx *qedf;
890
891 lport = shost_priv(sc_cmd->device->host);
892 qedf = lport_priv(lport);
893
894 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN ||
895 test_bit(QEDF_UNLOADING, &qedf->flags))
896 return FAILED;
897
898 QEDF_ERR(&(qedf->dbg_ctx), "HOST RESET Issued...");
899
900 qedf_ctx_soft_reset(lport);
901
902 return SUCCESS;
903 }
904
905 static int qedf_slave_configure(struct scsi_device *sdev)
906 {
907 if (qedf_queue_depth) {
908 scsi_change_queue_depth(sdev, qedf_queue_depth);
909 }
910
911 return 0;
912 }
913
914 static struct scsi_host_template qedf_host_template = {
915 .module = THIS_MODULE,
916 .name = QEDF_MODULE_NAME,
917 .this_id = -1,
918 .cmd_per_lun = 32,
919 .max_sectors = 0xffff,
920 .queuecommand = qedf_queuecommand,
921 .shost_attrs = qedf_host_attrs,
922 .eh_abort_handler = qedf_eh_abort,
923 .eh_device_reset_handler = qedf_eh_device_reset, /* lun reset */
924 .eh_target_reset_handler = qedf_eh_target_reset, /* target reset */
925 .eh_host_reset_handler = qedf_eh_host_reset,
926 .slave_configure = qedf_slave_configure,
927 .dma_boundary = QED_HW_DMA_BOUNDARY,
928 .sg_tablesize = QEDF_MAX_BDS_PER_CMD,
929 .can_queue = FCOE_PARAMS_NUM_TASKS,
930 .change_queue_depth = scsi_change_queue_depth,
931 };
932
933 static int qedf_get_paged_crc_eof(struct sk_buff *skb, int tlen)
934 {
935 int rc;
936
937 spin_lock(&qedf_global_lock);
938 rc = fcoe_get_paged_crc_eof(skb, tlen, &qedf_global);
939 spin_unlock(&qedf_global_lock);
940
941 return rc;
942 }
943
944 static struct qedf_rport *qedf_fcport_lookup(struct qedf_ctx *qedf, u32 port_id)
945 {
946 struct qedf_rport *fcport;
947 struct fc_rport_priv *rdata;
948
949 rcu_read_lock();
950 list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
951 rdata = fcport->rdata;
952 if (rdata == NULL)
953 continue;
954 if (rdata->ids.port_id == port_id) {
955 rcu_read_unlock();
956 return fcport;
957 }
958 }
959 rcu_read_unlock();
960
961 /* Return NULL to caller to let them know fcport was not found */
962 return NULL;
963 }
964
965 /* Transmits an ELS frame over an offloaded session */
966 static int qedf_xmit_l2_frame(struct qedf_rport *fcport, struct fc_frame *fp)
967 {
968 struct fc_frame_header *fh;
969 int rc = 0;
970
971 fh = fc_frame_header_get(fp);
972 if ((fh->fh_type == FC_TYPE_ELS) &&
973 (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
974 switch (fc_frame_payload_op(fp)) {
975 case ELS_ADISC:
976 qedf_send_adisc(fcport, fp);
977 rc = 1;
978 break;
979 }
980 }
981
982 return rc;
983 }
984
985 /**
986 * qedf_xmit - qedf FCoE frame transmit function
987 *
988 */
989 static int qedf_xmit(struct fc_lport *lport, struct fc_frame *fp)
990 {
991 struct fc_lport *base_lport;
992 struct qedf_ctx *qedf;
993 struct ethhdr *eh;
994 struct fcoe_crc_eof *cp;
995 struct sk_buff *skb;
996 struct fc_frame_header *fh;
997 struct fcoe_hdr *hp;
998 u8 sof, eof;
999 u32 crc;
1000 unsigned int hlen, tlen, elen;
1001 int wlen;
1002 struct fc_stats *stats;
1003 struct fc_lport *tmp_lport;
1004 struct fc_lport *vn_port = NULL;
1005 struct qedf_rport *fcport;
1006 int rc;
1007 u16 vlan_tci = 0;
1008
1009 qedf = (struct qedf_ctx *)lport_priv(lport);
1010
1011 fh = fc_frame_header_get(fp);
1012 skb = fp_skb(fp);
1013
1014 /* Filter out traffic to other NPIV ports on the same host */
1015 if (lport->vport)
1016 base_lport = shost_priv(vport_to_shost(lport->vport));
1017 else
1018 base_lport = lport;
1019
1020 /* Flag if the destination is the base port */
1021 if (base_lport->port_id == ntoh24(fh->fh_d_id)) {
1022 vn_port = base_lport;
1023 } else {
1024 /* Got through the list of vports attached to the base_lport
1025 * and see if we have a match with the destination address.
1026 */
1027 list_for_each_entry(tmp_lport, &base_lport->vports, list) {
1028 if (tmp_lport->port_id == ntoh24(fh->fh_d_id)) {
1029 vn_port = tmp_lport;
1030 break;
1031 }
1032 }
1033 }
1034 if (vn_port && ntoh24(fh->fh_d_id) != FC_FID_FLOGI) {
1035 struct fc_rport_priv *rdata = NULL;
1036
1037 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
1038 "Dropping FCoE frame to %06x.\n", ntoh24(fh->fh_d_id));
1039 kfree_skb(skb);
1040 rdata = fc_rport_lookup(lport, ntoh24(fh->fh_d_id));
1041 if (rdata) {
1042 rdata->retries = lport->max_rport_retry_count;
1043 kref_put(&rdata->kref, fc_rport_destroy);
1044 }
1045 return -EINVAL;
1046 }
1047 /* End NPIV filtering */
1048
1049 if (!qedf->ctlr.sel_fcf) {
1050 kfree_skb(skb);
1051 return 0;
1052 }
1053
1054 if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
1055 QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
1056 kfree_skb(skb);
1057 return 0;
1058 }
1059
1060 if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
1061 QEDF_WARN(&(qedf->dbg_ctx), "qedf link down\n");
1062 kfree_skb(skb);
1063 return 0;
1064 }
1065
1066 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
1067 if (fcoe_ctlr_els_send(&qedf->ctlr, lport, skb))
1068 return 0;
1069 }
1070
1071 /* Check to see if this needs to be sent on an offloaded session */
1072 fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
1073
1074 if (fcport && test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1075 rc = qedf_xmit_l2_frame(fcport, fp);
1076 /*
1077 * If the frame was successfully sent over the middle path
1078 * then do not try to also send it over the LL2 path
1079 */
1080 if (rc)
1081 return 0;
1082 }
1083
1084 sof = fr_sof(fp);
1085 eof = fr_eof(fp);
1086
1087 elen = sizeof(struct ethhdr);
1088 hlen = sizeof(struct fcoe_hdr);
1089 tlen = sizeof(struct fcoe_crc_eof);
1090 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1091
1092 skb->ip_summed = CHECKSUM_NONE;
1093 crc = fcoe_fc_crc(fp);
1094
1095 /* copy port crc and eof to the skb buff */
1096 if (skb_is_nonlinear(skb)) {
1097 skb_frag_t *frag;
1098
1099 if (qedf_get_paged_crc_eof(skb, tlen)) {
1100 kfree_skb(skb);
1101 return -ENOMEM;
1102 }
1103 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1104 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);
1105 } else {
1106 cp = skb_put(skb, tlen);
1107 }
1108
1109 memset(cp, 0, sizeof(*cp));
1110 cp->fcoe_eof = eof;
1111 cp->fcoe_crc32 = cpu_to_le32(~crc);
1112 if (skb_is_nonlinear(skb)) {
1113 kunmap_atomic(cp);
1114 cp = NULL;
1115 }
1116
1117
1118 /* adjust skb network/transport offsets to match mac/fcoe/port */
1119 skb_push(skb, elen + hlen);
1120 skb_reset_mac_header(skb);
1121 skb_reset_network_header(skb);
1122 skb->mac_len = elen;
1123 skb->protocol = htons(ETH_P_FCOE);
1124
1125 /*
1126 * Add VLAN tag to non-offload FCoE frame based on current stored VLAN
1127 * for FIP/FCoE traffic.
1128 */
1129 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), qedf->vlan_id);
1130
1131 /* fill up mac and fcoe headers */
1132 eh = eth_hdr(skb);
1133 eh->h_proto = htons(ETH_P_FCOE);
1134 if (qedf->ctlr.map_dest)
1135 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1136 else
1137 /* insert GW address */
1138 ether_addr_copy(eh->h_dest, qedf->ctlr.dest_addr);
1139
1140 /* Set the source MAC address */
1141 ether_addr_copy(eh->h_source, qedf->data_src_addr);
1142
1143 hp = (struct fcoe_hdr *)(eh + 1);
1144 memset(hp, 0, sizeof(*hp));
1145 if (FC_FCOE_VER)
1146 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1147 hp->fcoe_sof = sof;
1148
1149 /*update tx stats */
1150 stats = per_cpu_ptr(lport->stats, get_cpu());
1151 stats->TxFrames++;
1152 stats->TxWords += wlen;
1153 put_cpu();
1154
1155 /* Get VLAN ID from skb for printing purposes */
1156 __vlan_hwaccel_get_tag(skb, &vlan_tci);
1157
1158 /* send down to lld */
1159 fr_dev(fp) = lport;
1160 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame send: "
1161 "src=%06x dest=%06x r_ctl=%x type=%x vlan=%04x.\n",
1162 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, fh->fh_type,
1163 vlan_tci);
1164 if (qedf_dump_frames)
1165 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
1166 1, skb->data, skb->len, false);
1167 rc = qed_ops->ll2->start_xmit(qedf->cdev, skb, 0);
1168 if (rc) {
1169 QEDF_ERR(&qedf->dbg_ctx, "start_xmit failed rc = %d.\n", rc);
1170 kfree_skb(skb);
1171 return rc;
1172 }
1173
1174 return 0;
1175 }
1176
1177 static int qedf_alloc_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
1178 {
1179 int rval = 0;
1180 u32 *pbl;
1181 dma_addr_t page;
1182 int num_pages;
1183
1184 /* Calculate appropriate queue and PBL sizes */
1185 fcport->sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
1186 fcport->sq_mem_size = ALIGN(fcport->sq_mem_size, QEDF_PAGE_SIZE);
1187 fcport->sq_pbl_size = (fcport->sq_mem_size / QEDF_PAGE_SIZE) *
1188 sizeof(void *);
1189 fcport->sq_pbl_size = fcport->sq_pbl_size + QEDF_PAGE_SIZE;
1190
1191 fcport->sq = dma_alloc_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
1192 &fcport->sq_dma, GFP_KERNEL);
1193 if (!fcport->sq) {
1194 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue.\n");
1195 rval = 1;
1196 goto out;
1197 }
1198
1199 fcport->sq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
1200 fcport->sq_pbl_size,
1201 &fcport->sq_pbl_dma, GFP_KERNEL);
1202 if (!fcport->sq_pbl) {
1203 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue PBL.\n");
1204 rval = 1;
1205 goto out_free_sq;
1206 }
1207
1208 /* Create PBL */
1209 num_pages = fcport->sq_mem_size / QEDF_PAGE_SIZE;
1210 page = fcport->sq_dma;
1211 pbl = (u32 *)fcport->sq_pbl;
1212
1213 while (num_pages--) {
1214 *pbl = U64_LO(page);
1215 pbl++;
1216 *pbl = U64_HI(page);
1217 pbl++;
1218 page += QEDF_PAGE_SIZE;
1219 }
1220
1221 return rval;
1222
1223 out_free_sq:
1224 dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size, fcport->sq,
1225 fcport->sq_dma);
1226 out:
1227 return rval;
1228 }
1229
1230 static void qedf_free_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
1231 {
1232 if (fcport->sq_pbl)
1233 dma_free_coherent(&qedf->pdev->dev, fcport->sq_pbl_size,
1234 fcport->sq_pbl, fcport->sq_pbl_dma);
1235 if (fcport->sq)
1236 dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
1237 fcport->sq, fcport->sq_dma);
1238 }
1239
1240 static int qedf_offload_connection(struct qedf_ctx *qedf,
1241 struct qedf_rport *fcport)
1242 {
1243 struct qed_fcoe_params_offload conn_info;
1244 u32 port_id;
1245 int rval;
1246 uint16_t total_sqe = (fcport->sq_mem_size / sizeof(struct fcoe_wqe));
1247
1248 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offloading connection "
1249 "portid=%06x.\n", fcport->rdata->ids.port_id);
1250 rval = qed_ops->acquire_conn(qedf->cdev, &fcport->handle,
1251 &fcport->fw_cid, &fcport->p_doorbell);
1252 if (rval) {
1253 QEDF_WARN(&(qedf->dbg_ctx), "Could not acquire connection "
1254 "for portid=%06x.\n", fcport->rdata->ids.port_id);
1255 rval = 1; /* For some reason qed returns 0 on failure here */
1256 goto out;
1257 }
1258
1259 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "portid=%06x "
1260 "fw_cid=%08x handle=%d.\n", fcport->rdata->ids.port_id,
1261 fcport->fw_cid, fcport->handle);
1262
1263 memset(&conn_info, 0, sizeof(struct qed_fcoe_params_offload));
1264
1265 /* Fill in the offload connection info */
1266 conn_info.sq_pbl_addr = fcport->sq_pbl_dma;
1267
1268 conn_info.sq_curr_page_addr = (dma_addr_t)(*(u64 *)fcport->sq_pbl);
1269 conn_info.sq_next_page_addr =
1270 (dma_addr_t)(*(u64 *)(fcport->sq_pbl + 8));
1271
1272 /* Need to use our FCoE MAC for the offload session */
1273 ether_addr_copy(conn_info.src_mac, qedf->data_src_addr);
1274
1275 ether_addr_copy(conn_info.dst_mac, qedf->ctlr.dest_addr);
1276
1277 conn_info.tx_max_fc_pay_len = fcport->rdata->maxframe_size;
1278 conn_info.e_d_tov_timer_val = qedf->lport->e_d_tov / 20;
1279 conn_info.rec_tov_timer_val = 3; /* I think this is what E3 was */
1280 conn_info.rx_max_fc_pay_len = fcport->rdata->maxframe_size;
1281
1282 /* Set VLAN data */
1283 conn_info.vlan_tag = qedf->vlan_id <<
1284 FCOE_CONN_OFFLOAD_RAMROD_DATA_VLAN_ID_SHIFT;
1285 conn_info.vlan_tag |=
1286 qedf->prio << FCOE_CONN_OFFLOAD_RAMROD_DATA_PRIORITY_SHIFT;
1287 conn_info.flags |= (FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_MASK <<
1288 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_SHIFT);
1289
1290 /* Set host port source id */
1291 port_id = fc_host_port_id(qedf->lport->host);
1292 fcport->sid = port_id;
1293 conn_info.s_id.addr_hi = (port_id & 0x000000FF);
1294 conn_info.s_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1295 conn_info.s_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1296
1297 conn_info.max_conc_seqs_c3 = fcport->rdata->max_seq;
1298
1299 /* Set remote port destination id */
1300 port_id = fcport->rdata->rport->port_id;
1301 conn_info.d_id.addr_hi = (port_id & 0x000000FF);
1302 conn_info.d_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1303 conn_info.d_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1304
1305 conn_info.def_q_idx = 0; /* Default index for send queue? */
1306
1307 /* Set FC-TAPE specific flags if needed */
1308 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
1309 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN,
1310 "Enable CONF, REC for portid=%06x.\n",
1311 fcport->rdata->ids.port_id);
1312 conn_info.flags |= 1 <<
1313 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_CONF_REQ_SHIFT;
1314 conn_info.flags |=
1315 ((fcport->rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
1316 FCOE_CONN_OFFLOAD_RAMROD_DATA_B_REC_VALID_SHIFT;
1317 }
1318
1319 rval = qed_ops->offload_conn(qedf->cdev, fcport->handle, &conn_info);
1320 if (rval) {
1321 QEDF_WARN(&(qedf->dbg_ctx), "Could not offload connection "
1322 "for portid=%06x.\n", fcport->rdata->ids.port_id);
1323 goto out_free_conn;
1324 } else
1325 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offload "
1326 "succeeded portid=%06x total_sqe=%d.\n",
1327 fcport->rdata->ids.port_id, total_sqe);
1328
1329 spin_lock_init(&fcport->rport_lock);
1330 atomic_set(&fcport->free_sqes, total_sqe);
1331 return 0;
1332 out_free_conn:
1333 qed_ops->release_conn(qedf->cdev, fcport->handle);
1334 out:
1335 return rval;
1336 }
1337
1338 #define QEDF_TERM_BUFF_SIZE 10
1339 static void qedf_upload_connection(struct qedf_ctx *qedf,
1340 struct qedf_rport *fcport)
1341 {
1342 void *term_params;
1343 dma_addr_t term_params_dma;
1344
1345 /* Term params needs to be a DMA coherent buffer as qed shared the
1346 * physical DMA address with the firmware. The buffer may be used in
1347 * the receive path so we may eventually have to move this.
1348 */
1349 term_params = dma_alloc_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE,
1350 &term_params_dma, GFP_KERNEL);
1351
1352 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Uploading connection "
1353 "port_id=%06x.\n", fcport->rdata->ids.port_id);
1354
1355 qed_ops->destroy_conn(qedf->cdev, fcport->handle, term_params_dma);
1356 qed_ops->release_conn(qedf->cdev, fcport->handle);
1357
1358 dma_free_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE, term_params,
1359 term_params_dma);
1360 }
1361
1362 static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
1363 struct qedf_rport *fcport)
1364 {
1365 struct fc_rport_priv *rdata = fcport->rdata;
1366
1367 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Cleaning up portid=%06x.\n",
1368 fcport->rdata->ids.port_id);
1369
1370 /* Flush any remaining i/o's before we upload the connection */
1371 qedf_flush_active_ios(fcport, -1);
1372
1373 if (test_and_clear_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))
1374 qedf_upload_connection(qedf, fcport);
1375 qedf_free_sq(qedf, fcport);
1376 fcport->rdata = NULL;
1377 fcport->qedf = NULL;
1378 kref_put(&rdata->kref, fc_rport_destroy);
1379 }
1380
1381 /**
1382 * This event_callback is called after successful completion of libfc
1383 * initiated target login. qedf can proceed with initiating the session
1384 * establishment.
1385 */
1386 static void qedf_rport_event_handler(struct fc_lport *lport,
1387 struct fc_rport_priv *rdata,
1388 enum fc_rport_event event)
1389 {
1390 struct qedf_ctx *qedf = lport_priv(lport);
1391 struct fc_rport *rport = rdata->rport;
1392 struct fc_rport_libfc_priv *rp;
1393 struct qedf_rport *fcport;
1394 u32 port_id;
1395 int rval;
1396 unsigned long flags;
1397
1398 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "event = %d, "
1399 "port_id = 0x%x\n", event, rdata->ids.port_id);
1400
1401 switch (event) {
1402 case RPORT_EV_READY:
1403 if (!rport) {
1404 QEDF_WARN(&(qedf->dbg_ctx), "rport is NULL.\n");
1405 break;
1406 }
1407
1408 rp = rport->dd_data;
1409 fcport = (struct qedf_rport *)&rp[1];
1410 fcport->qedf = qedf;
1411
1412 if (atomic_read(&qedf->num_offloads) >= QEDF_MAX_SESSIONS) {
1413 QEDF_ERR(&(qedf->dbg_ctx), "Not offloading "
1414 "portid=0x%x as max number of offloaded sessions "
1415 "reached.\n", rdata->ids.port_id);
1416 return;
1417 }
1418
1419 /*
1420 * Don't try to offload the session again. Can happen when we
1421 * get an ADISC
1422 */
1423 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1424 QEDF_WARN(&(qedf->dbg_ctx), "Session already "
1425 "offloaded, portid=0x%x.\n",
1426 rdata->ids.port_id);
1427 return;
1428 }
1429
1430 if (rport->port_id == FC_FID_DIR_SERV) {
1431 /*
1432 * qedf_rport structure doesn't exist for
1433 * directory server.
1434 * We should not come here, as lport will
1435 * take care of fabric login
1436 */
1437 QEDF_WARN(&(qedf->dbg_ctx), "rport struct does not "
1438 "exist for dir server port_id=%x\n",
1439 rdata->ids.port_id);
1440 break;
1441 }
1442
1443 if (rdata->spp_type != FC_TYPE_FCP) {
1444 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1445 "Not offloading since spp type isn't FCP\n");
1446 break;
1447 }
1448 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
1449 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1450 "Not FCP target so not offloading\n");
1451 break;
1452 }
1453
1454 /* Initial reference held on entry, so this can't fail */
1455 kref_get(&rdata->kref);
1456 fcport->rdata = rdata;
1457 fcport->rport = rport;
1458
1459 rval = qedf_alloc_sq(qedf, fcport);
1460 if (rval) {
1461 qedf_cleanup_fcport(qedf, fcport);
1462 break;
1463 }
1464
1465 /* Set device type */
1466 if (rdata->flags & FC_RP_FLAGS_RETRY &&
1467 rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
1468 !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
1469 fcport->dev_type = QEDF_RPORT_TYPE_TAPE;
1470 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1471 "portid=%06x is a TAPE device.\n",
1472 rdata->ids.port_id);
1473 } else {
1474 fcport->dev_type = QEDF_RPORT_TYPE_DISK;
1475 }
1476
1477 rval = qedf_offload_connection(qedf, fcport);
1478 if (rval) {
1479 qedf_cleanup_fcport(qedf, fcport);
1480 break;
1481 }
1482
1483 /* Add fcport to list of qedf_ctx list of offloaded ports */
1484 spin_lock_irqsave(&qedf->hba_lock, flags);
1485 list_add_rcu(&fcport->peers, &qedf->fcports);
1486 spin_unlock_irqrestore(&qedf->hba_lock, flags);
1487
1488 /*
1489 * Set the session ready bit to let everyone know that this
1490 * connection is ready for I/O
1491 */
1492 set_bit(QEDF_RPORT_SESSION_READY, &fcport->flags);
1493 atomic_inc(&qedf->num_offloads);
1494
1495 break;
1496 case RPORT_EV_LOGO:
1497 case RPORT_EV_FAILED:
1498 case RPORT_EV_STOP:
1499 port_id = rdata->ids.port_id;
1500 if (port_id == FC_FID_DIR_SERV)
1501 break;
1502
1503 if (!rport) {
1504 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1505 "port_id=%x - rport notcreated Yet!!\n", port_id);
1506 break;
1507 }
1508 rp = rport->dd_data;
1509 /*
1510 * Perform session upload. Note that rdata->peers is already
1511 * removed from disc->rports list before we get this event.
1512 */
1513 fcport = (struct qedf_rport *)&rp[1];
1514
1515 spin_lock_irqsave(&fcport->rport_lock, flags);
1516 /* Only free this fcport if it is offloaded already */
1517 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) &&
1518 !test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1519 &fcport->flags)) {
1520 set_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1521 &fcport->flags);
1522 spin_unlock_irqrestore(&fcport->rport_lock, flags);
1523 qedf_cleanup_fcport(qedf, fcport);
1524 /*
1525 * Remove fcport to list of qedf_ctx list of offloaded
1526 * ports
1527 */
1528 spin_lock_irqsave(&qedf->hba_lock, flags);
1529 list_del_rcu(&fcport->peers);
1530 spin_unlock_irqrestore(&qedf->hba_lock, flags);
1531
1532 clear_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1533 &fcport->flags);
1534 atomic_dec(&qedf->num_offloads);
1535 } else {
1536 spin_unlock_irqrestore(&fcport->rport_lock, flags);
1537 }
1538 break;
1539
1540 case RPORT_EV_NONE:
1541 break;
1542 }
1543 }
1544
1545 static void qedf_abort_io(struct fc_lport *lport)
1546 {
1547 /* NO-OP but need to fill in the template */
1548 }
1549
1550 static void qedf_fcp_cleanup(struct fc_lport *lport)
1551 {
1552 /*
1553 * NO-OP but need to fill in template to prevent a NULL
1554 * function pointer dereference during link down. I/Os
1555 * will be flushed when port is uploaded.
1556 */
1557 }
1558
1559 static struct libfc_function_template qedf_lport_template = {
1560 .frame_send = qedf_xmit,
1561 .fcp_abort_io = qedf_abort_io,
1562 .fcp_cleanup = qedf_fcp_cleanup,
1563 .rport_event_callback = qedf_rport_event_handler,
1564 .elsct_send = qedf_elsct_send,
1565 };
1566
1567 static void qedf_fcoe_ctlr_setup(struct qedf_ctx *qedf)
1568 {
1569 fcoe_ctlr_init(&qedf->ctlr, FIP_MODE_AUTO);
1570
1571 qedf->ctlr.send = qedf_fip_send;
1572 qedf->ctlr.get_src_addr = qedf_get_src_mac;
1573 ether_addr_copy(qedf->ctlr.ctl_src_addr, qedf->mac);
1574 }
1575
1576 static void qedf_setup_fdmi(struct qedf_ctx *qedf)
1577 {
1578 struct fc_lport *lport = qedf->lport;
1579 struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
1580 u8 buf[8];
1581 int i, pos;
1582
1583 /*
1584 * fdmi_enabled needs to be set for libfc to execute FDMI registration.
1585 */
1586 lport->fdmi_enabled = 1;
1587
1588 /*
1589 * Setup the necessary fc_host attributes to that will be used to fill
1590 * in the FDMI information.
1591 */
1592
1593 /* Get the PCI-e Device Serial Number Capability */
1594 pos = pci_find_ext_capability(qedf->pdev, PCI_EXT_CAP_ID_DSN);
1595 if (pos) {
1596 pos += 4;
1597 for (i = 0; i < 8; i++)
1598 pci_read_config_byte(qedf->pdev, pos + i, &buf[i]);
1599
1600 snprintf(fc_host->serial_number,
1601 sizeof(fc_host->serial_number),
1602 "%02X%02X%02X%02X%02X%02X%02X%02X",
1603 buf[7], buf[6], buf[5], buf[4],
1604 buf[3], buf[2], buf[1], buf[0]);
1605 } else
1606 snprintf(fc_host->serial_number,
1607 sizeof(fc_host->serial_number), "Unknown");
1608
1609 snprintf(fc_host->manufacturer,
1610 sizeof(fc_host->manufacturer), "%s", "Cavium Inc.");
1611
1612 snprintf(fc_host->model, sizeof(fc_host->model), "%s", "QL41000");
1613
1614 snprintf(fc_host->model_description, sizeof(fc_host->model_description),
1615 "%s", "QLogic FastLinQ QL41000 Series 10/25/40/50GGbE Controller"
1616 "(FCoE)");
1617
1618 snprintf(fc_host->hardware_version, sizeof(fc_host->hardware_version),
1619 "Rev %d", qedf->pdev->revision);
1620
1621 snprintf(fc_host->driver_version, sizeof(fc_host->driver_version),
1622 "%s", QEDF_VERSION);
1623
1624 snprintf(fc_host->firmware_version, sizeof(fc_host->firmware_version),
1625 "%d.%d.%d.%d", FW_MAJOR_VERSION, FW_MINOR_VERSION,
1626 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
1627 }
1628
1629 static int qedf_lport_setup(struct qedf_ctx *qedf)
1630 {
1631 struct fc_lport *lport = qedf->lport;
1632
1633 lport->link_up = 0;
1634 lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1635 lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1636 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1637 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1638 lport->boot_time = jiffies;
1639 lport->e_d_tov = 2 * 1000;
1640 lport->r_a_tov = 10 * 1000;
1641
1642 /* Set NPIV support */
1643 lport->does_npiv = 1;
1644 fc_host_max_npiv_vports(lport->host) = QEDF_MAX_NPIV;
1645
1646 fc_set_wwnn(lport, qedf->wwnn);
1647 fc_set_wwpn(lport, qedf->wwpn);
1648
1649 if (fcoe_libfc_config(lport, &qedf->ctlr, &qedf_lport_template, 0)) {
1650 QEDF_ERR(&qedf->dbg_ctx,
1651 "fcoe_libfc_config failed.\n");
1652 return -ENOMEM;
1653 }
1654
1655 /* Allocate the exchange manager */
1656 fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_PARAMS_NUM_TASKS,
1657 0xfffe, NULL);
1658
1659 if (fc_lport_init_stats(lport))
1660 return -ENOMEM;
1661
1662 /* Finish lport config */
1663 fc_lport_config(lport);
1664
1665 /* Set max frame size */
1666 fc_set_mfs(lport, QEDF_MFS);
1667 fc_host_maxframe_size(lport->host) = lport->mfs;
1668
1669 /* Set default dev_loss_tmo based on module parameter */
1670 fc_host_dev_loss_tmo(lport->host) = qedf_dev_loss_tmo;
1671
1672 /* Set symbolic node name */
1673 snprintf(fc_host_symbolic_name(lport->host), 256,
1674 "QLogic %s v%s", QEDF_MODULE_NAME, QEDF_VERSION);
1675
1676 qedf_setup_fdmi(qedf);
1677
1678 return 0;
1679 }
1680
1681 /*
1682 * NPIV functions
1683 */
1684
1685 static int qedf_vport_libfc_config(struct fc_vport *vport,
1686 struct fc_lport *lport)
1687 {
1688 lport->link_up = 0;
1689 lport->qfull = 0;
1690 lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1691 lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1692 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1693 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1694 lport->boot_time = jiffies;
1695 lport->e_d_tov = 2 * 1000;
1696 lport->r_a_tov = 10 * 1000;
1697 lport->does_npiv = 1; /* Temporary until we add NPIV support */
1698
1699 /* Allocate stats for vport */
1700 if (fc_lport_init_stats(lport))
1701 return -ENOMEM;
1702
1703 /* Finish lport config */
1704 fc_lport_config(lport);
1705
1706 /* offload related configuration */
1707 lport->crc_offload = 0;
1708 lport->seq_offload = 0;
1709 lport->lro_enabled = 0;
1710 lport->lro_xid = 0;
1711 lport->lso_max = 0;
1712
1713 return 0;
1714 }
1715
1716 static int qedf_vport_create(struct fc_vport *vport, bool disabled)
1717 {
1718 struct Scsi_Host *shost = vport_to_shost(vport);
1719 struct fc_lport *n_port = shost_priv(shost);
1720 struct fc_lport *vn_port;
1721 struct qedf_ctx *base_qedf = lport_priv(n_port);
1722 struct qedf_ctx *vport_qedf;
1723
1724 char buf[32];
1725 int rc = 0;
1726
1727 rc = fcoe_validate_vport_create(vport);
1728 if (rc) {
1729 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1730 QEDF_WARN(&(base_qedf->dbg_ctx), "Failed to create vport, "
1731 "WWPN (0x%s) already exists.\n", buf);
1732 goto err1;
1733 }
1734
1735 if (atomic_read(&base_qedf->link_state) != QEDF_LINK_UP) {
1736 QEDF_WARN(&(base_qedf->dbg_ctx), "Cannot create vport "
1737 "because link is not up.\n");
1738 rc = -EIO;
1739 goto err1;
1740 }
1741
1742 vn_port = libfc_vport_create(vport, sizeof(struct qedf_ctx));
1743 if (!vn_port) {
1744 QEDF_WARN(&(base_qedf->dbg_ctx), "Could not create lport "
1745 "for vport.\n");
1746 rc = -ENOMEM;
1747 goto err1;
1748 }
1749
1750 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1751 QEDF_ERR(&(base_qedf->dbg_ctx), "Creating NPIV port, WWPN=%s.\n",
1752 buf);
1753
1754 /* Copy some fields from base_qedf */
1755 vport_qedf = lport_priv(vn_port);
1756 memcpy(vport_qedf, base_qedf, sizeof(struct qedf_ctx));
1757
1758 /* Set qedf data specific to this vport */
1759 vport_qedf->lport = vn_port;
1760 /* Use same hba_lock as base_qedf */
1761 vport_qedf->hba_lock = base_qedf->hba_lock;
1762 vport_qedf->pdev = base_qedf->pdev;
1763 vport_qedf->cmd_mgr = base_qedf->cmd_mgr;
1764 init_completion(&vport_qedf->flogi_compl);
1765 INIT_LIST_HEAD(&vport_qedf->fcports);
1766
1767 rc = qedf_vport_libfc_config(vport, vn_port);
1768 if (rc) {
1769 QEDF_ERR(&(base_qedf->dbg_ctx), "Could not allocate memory "
1770 "for lport stats.\n");
1771 goto err2;
1772 }
1773
1774 fc_set_wwnn(vn_port, vport->node_name);
1775 fc_set_wwpn(vn_port, vport->port_name);
1776 vport_qedf->wwnn = vn_port->wwnn;
1777 vport_qedf->wwpn = vn_port->wwpn;
1778
1779 vn_port->host->transportt = qedf_fc_vport_transport_template;
1780 vn_port->host->can_queue = FCOE_PARAMS_NUM_TASKS;
1781 vn_port->host->max_lun = qedf_max_lun;
1782 vn_port->host->sg_tablesize = QEDF_MAX_BDS_PER_CMD;
1783 vn_port->host->max_cmd_len = QEDF_MAX_CDB_LEN;
1784
1785 rc = scsi_add_host(vn_port->host, &vport->dev);
1786 if (rc) {
1787 QEDF_WARN(&base_qedf->dbg_ctx,
1788 "Error adding Scsi_Host rc=0x%x.\n", rc);
1789 goto err2;
1790 }
1791
1792 /* Set default dev_loss_tmo based on module parameter */
1793 fc_host_dev_loss_tmo(vn_port->host) = qedf_dev_loss_tmo;
1794
1795 /* Init libfc stuffs */
1796 memcpy(&vn_port->tt, &qedf_lport_template,
1797 sizeof(qedf_lport_template));
1798 fc_exch_init(vn_port);
1799 fc_elsct_init(vn_port);
1800 fc_lport_init(vn_port);
1801 fc_disc_init(vn_port);
1802 fc_disc_config(vn_port, vn_port);
1803
1804
1805 /* Allocate the exchange manager */
1806 shost = vport_to_shost(vport);
1807 n_port = shost_priv(shost);
1808 fc_exch_mgr_list_clone(n_port, vn_port);
1809
1810 /* Set max frame size */
1811 fc_set_mfs(vn_port, QEDF_MFS);
1812
1813 fc_host_port_type(vn_port->host) = FC_PORTTYPE_UNKNOWN;
1814
1815 if (disabled) {
1816 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1817 } else {
1818 vn_port->boot_time = jiffies;
1819 fc_fabric_login(vn_port);
1820 fc_vport_setlink(vn_port);
1821 }
1822
1823 QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_NPIV, "vn_port=%p.\n",
1824 vn_port);
1825
1826 /* Set up debug context for vport */
1827 vport_qedf->dbg_ctx.host_no = vn_port->host->host_no;
1828 vport_qedf->dbg_ctx.pdev = base_qedf->pdev;
1829
1830 err2:
1831 scsi_host_put(vn_port->host);
1832 err1:
1833 return rc;
1834 }
1835
1836 static int qedf_vport_destroy(struct fc_vport *vport)
1837 {
1838 struct Scsi_Host *shost = vport_to_shost(vport);
1839 struct fc_lport *n_port = shost_priv(shost);
1840 struct fc_lport *vn_port = vport->dd_data;
1841 struct qedf_ctx *qedf = lport_priv(vn_port);
1842
1843 if (!qedf) {
1844 QEDF_ERR(NULL, "qedf is NULL.\n");
1845 goto out;
1846 }
1847
1848 /* Set unloading bit on vport qedf_ctx to prevent more I/O */
1849 set_bit(QEDF_UNLOADING, &qedf->flags);
1850
1851 mutex_lock(&n_port->lp_mutex);
1852 list_del(&vn_port->list);
1853 mutex_unlock(&n_port->lp_mutex);
1854
1855 fc_fabric_logoff(vn_port);
1856 fc_lport_destroy(vn_port);
1857
1858 /* Detach from scsi-ml */
1859 fc_remove_host(vn_port->host);
1860 scsi_remove_host(vn_port->host);
1861
1862 /*
1863 * Only try to release the exchange manager if the vn_port
1864 * configuration is complete.
1865 */
1866 if (vn_port->state == LPORT_ST_READY)
1867 fc_exch_mgr_free(vn_port);
1868
1869 /* Free memory used by statistical counters */
1870 fc_lport_free_stats(vn_port);
1871
1872 /* Release Scsi_Host */
1873 if (vn_port->host)
1874 scsi_host_put(vn_port->host);
1875
1876 out:
1877 return 0;
1878 }
1879
1880 static int qedf_vport_disable(struct fc_vport *vport, bool disable)
1881 {
1882 struct fc_lport *lport = vport->dd_data;
1883
1884 if (disable) {
1885 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1886 fc_fabric_logoff(lport);
1887 } else {
1888 lport->boot_time = jiffies;
1889 fc_fabric_login(lport);
1890 fc_vport_setlink(lport);
1891 }
1892 return 0;
1893 }
1894
1895 /*
1896 * During removal we need to wait for all the vports associated with a port
1897 * to be destroyed so we avoid a race condition where libfc is still trying
1898 * to reap vports while the driver remove function has already reaped the
1899 * driver contexts associated with the physical port.
1900 */
1901 static void qedf_wait_for_vport_destroy(struct qedf_ctx *qedf)
1902 {
1903 struct fc_host_attrs *fc_host = shost_to_fc_host(qedf->lport->host);
1904
1905 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
1906 "Entered.\n");
1907 while (fc_host->npiv_vports_inuse > 0) {
1908 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
1909 "Waiting for all vports to be reaped.\n");
1910 msleep(1000);
1911 }
1912 }
1913
1914 /**
1915 * qedf_fcoe_reset - Resets the fcoe
1916 *
1917 * @shost: shost the reset is from
1918 *
1919 * Returns: always 0
1920 */
1921 static int qedf_fcoe_reset(struct Scsi_Host *shost)
1922 {
1923 struct fc_lport *lport = shost_priv(shost);
1924
1925 qedf_ctx_soft_reset(lport);
1926 return 0;
1927 }
1928
1929 static void qedf_get_host_port_id(struct Scsi_Host *shost)
1930 {
1931 struct fc_lport *lport = shost_priv(shost);
1932
1933 fc_host_port_id(shost) = lport->port_id;
1934 }
1935
1936 static struct fc_host_statistics *qedf_fc_get_host_stats(struct Scsi_Host
1937 *shost)
1938 {
1939 struct fc_host_statistics *qedf_stats;
1940 struct fc_lport *lport = shost_priv(shost);
1941 struct qedf_ctx *qedf = lport_priv(lport);
1942 struct qed_fcoe_stats *fw_fcoe_stats;
1943
1944 qedf_stats = fc_get_host_stats(shost);
1945
1946 /* We don't collect offload stats for specific NPIV ports */
1947 if (lport->vport)
1948 goto out;
1949
1950 fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
1951 if (!fw_fcoe_stats) {
1952 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
1953 "fw_fcoe_stats.\n");
1954 goto out;
1955 }
1956
1957 mutex_lock(&qedf->stats_mutex);
1958
1959 /* Query firmware for offload stats */
1960 qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
1961
1962 /*
1963 * The expectation is that we add our offload stats to the stats
1964 * being maintained by libfc each time the fc_get_host_status callback
1965 * is invoked. The additions are not carried over for each call to
1966 * the fc_get_host_stats callback.
1967 */
1968 qedf_stats->tx_frames += fw_fcoe_stats->fcoe_tx_data_pkt_cnt +
1969 fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt +
1970 fw_fcoe_stats->fcoe_tx_other_pkt_cnt;
1971 qedf_stats->rx_frames += fw_fcoe_stats->fcoe_rx_data_pkt_cnt +
1972 fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt +
1973 fw_fcoe_stats->fcoe_rx_other_pkt_cnt;
1974 qedf_stats->fcp_input_megabytes +=
1975 do_div(fw_fcoe_stats->fcoe_rx_byte_cnt, 1000000);
1976 qedf_stats->fcp_output_megabytes +=
1977 do_div(fw_fcoe_stats->fcoe_tx_byte_cnt, 1000000);
1978 qedf_stats->rx_words += fw_fcoe_stats->fcoe_rx_byte_cnt / 4;
1979 qedf_stats->tx_words += fw_fcoe_stats->fcoe_tx_byte_cnt / 4;
1980 qedf_stats->invalid_crc_count +=
1981 fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt;
1982 qedf_stats->dumped_frames =
1983 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
1984 qedf_stats->error_frames +=
1985 fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
1986 qedf_stats->fcp_input_requests += qedf->input_requests;
1987 qedf_stats->fcp_output_requests += qedf->output_requests;
1988 qedf_stats->fcp_control_requests += qedf->control_requests;
1989 qedf_stats->fcp_packet_aborts += qedf->packet_aborts;
1990 qedf_stats->fcp_frame_alloc_failures += qedf->alloc_failures;
1991
1992 mutex_unlock(&qedf->stats_mutex);
1993 kfree(fw_fcoe_stats);
1994 out:
1995 return qedf_stats;
1996 }
1997
1998 static struct fc_function_template qedf_fc_transport_fn = {
1999 .show_host_node_name = 1,
2000 .show_host_port_name = 1,
2001 .show_host_supported_classes = 1,
2002 .show_host_supported_fc4s = 1,
2003 .show_host_active_fc4s = 1,
2004 .show_host_maxframe_size = 1,
2005
2006 .get_host_port_id = qedf_get_host_port_id,
2007 .show_host_port_id = 1,
2008 .show_host_supported_speeds = 1,
2009 .get_host_speed = fc_get_host_speed,
2010 .show_host_speed = 1,
2011 .show_host_port_type = 1,
2012 .get_host_port_state = fc_get_host_port_state,
2013 .show_host_port_state = 1,
2014 .show_host_symbolic_name = 1,
2015
2016 /*
2017 * Tell FC transport to allocate enough space to store the backpointer
2018 * for the associate qedf_rport struct.
2019 */
2020 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2021 sizeof(struct qedf_rport)),
2022 .show_rport_maxframe_size = 1,
2023 .show_rport_supported_classes = 1,
2024 .show_host_fabric_name = 1,
2025 .show_starget_node_name = 1,
2026 .show_starget_port_name = 1,
2027 .show_starget_port_id = 1,
2028 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2029 .show_rport_dev_loss_tmo = 1,
2030 .get_fc_host_stats = qedf_fc_get_host_stats,
2031 .issue_fc_host_lip = qedf_fcoe_reset,
2032 .vport_create = qedf_vport_create,
2033 .vport_delete = qedf_vport_destroy,
2034 .vport_disable = qedf_vport_disable,
2035 .bsg_request = fc_lport_bsg_request,
2036 };
2037
2038 static struct fc_function_template qedf_fc_vport_transport_fn = {
2039 .show_host_node_name = 1,
2040 .show_host_port_name = 1,
2041 .show_host_supported_classes = 1,
2042 .show_host_supported_fc4s = 1,
2043 .show_host_active_fc4s = 1,
2044 .show_host_maxframe_size = 1,
2045 .show_host_port_id = 1,
2046 .show_host_supported_speeds = 1,
2047 .get_host_speed = fc_get_host_speed,
2048 .show_host_speed = 1,
2049 .show_host_port_type = 1,
2050 .get_host_port_state = fc_get_host_port_state,
2051 .show_host_port_state = 1,
2052 .show_host_symbolic_name = 1,
2053 .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2054 sizeof(struct qedf_rport)),
2055 .show_rport_maxframe_size = 1,
2056 .show_rport_supported_classes = 1,
2057 .show_host_fabric_name = 1,
2058 .show_starget_node_name = 1,
2059 .show_starget_port_name = 1,
2060 .show_starget_port_id = 1,
2061 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2062 .show_rport_dev_loss_tmo = 1,
2063 .get_fc_host_stats = fc_get_host_stats,
2064 .issue_fc_host_lip = qedf_fcoe_reset,
2065 .bsg_request = fc_lport_bsg_request,
2066 };
2067
2068 static bool qedf_fp_has_work(struct qedf_fastpath *fp)
2069 {
2070 struct qedf_ctx *qedf = fp->qedf;
2071 struct global_queue *que;
2072 struct qed_sb_info *sb_info = fp->sb_info;
2073 struct status_block_e4 *sb = sb_info->sb_virt;
2074 u16 prod_idx;
2075
2076 /* Get the pointer to the global CQ this completion is on */
2077 que = qedf->global_queues[fp->sb_id];
2078
2079 /* Be sure all responses have been written to PI */
2080 rmb();
2081
2082 /* Get the current firmware producer index */
2083 prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
2084
2085 return (que->cq_prod_idx != prod_idx);
2086 }
2087
2088 /*
2089 * Interrupt handler code.
2090 */
2091
2092 /* Process completion queue and copy CQE contents for deferred processesing
2093 *
2094 * Return true if we should wake the I/O thread, false if not.
2095 */
2096 static bool qedf_process_completions(struct qedf_fastpath *fp)
2097 {
2098 struct qedf_ctx *qedf = fp->qedf;
2099 struct qed_sb_info *sb_info = fp->sb_info;
2100 struct status_block_e4 *sb = sb_info->sb_virt;
2101 struct global_queue *que;
2102 u16 prod_idx;
2103 struct fcoe_cqe *cqe;
2104 struct qedf_io_work *io_work;
2105 int num_handled = 0;
2106 unsigned int cpu;
2107 struct qedf_ioreq *io_req = NULL;
2108 u16 xid;
2109 u16 new_cqes;
2110 u32 comp_type;
2111
2112 /* Get the current firmware producer index */
2113 prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
2114
2115 /* Get the pointer to the global CQ this completion is on */
2116 que = qedf->global_queues[fp->sb_id];
2117
2118 /* Calculate the amount of new elements since last processing */
2119 new_cqes = (prod_idx >= que->cq_prod_idx) ?
2120 (prod_idx - que->cq_prod_idx) :
2121 0x10000 - que->cq_prod_idx + prod_idx;
2122
2123 /* Save producer index */
2124 que->cq_prod_idx = prod_idx;
2125
2126 while (new_cqes) {
2127 fp->completions++;
2128 num_handled++;
2129 cqe = &que->cq[que->cq_cons_idx];
2130
2131 comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
2132 FCOE_CQE_CQE_TYPE_MASK;
2133
2134 /*
2135 * Process unsolicited CQEs directly in the interrupt handler
2136 * sine we need the fastpath ID
2137 */
2138 if (comp_type == FCOE_UNSOLIC_CQE_TYPE) {
2139 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
2140 "Unsolicated CQE.\n");
2141 qedf_process_unsol_compl(qedf, fp->sb_id, cqe);
2142 /*
2143 * Don't add a work list item. Increment consumer
2144 * consumer index and move on.
2145 */
2146 goto inc_idx;
2147 }
2148
2149 xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
2150 io_req = &qedf->cmd_mgr->cmds[xid];
2151
2152 /*
2153 * Figure out which percpu thread we should queue this I/O
2154 * on.
2155 */
2156 if (!io_req)
2157 /* If there is not io_req assocated with this CQE
2158 * just queue it on CPU 0
2159 */
2160 cpu = 0;
2161 else {
2162 cpu = io_req->cpu;
2163 io_req->int_cpu = smp_processor_id();
2164 }
2165
2166 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
2167 if (!io_work) {
2168 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
2169 "work for I/O completion.\n");
2170 continue;
2171 }
2172 memset(io_work, 0, sizeof(struct qedf_io_work));
2173
2174 INIT_WORK(&io_work->work, qedf_fp_io_handler);
2175
2176 /* Copy contents of CQE for deferred processing */
2177 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));
2178
2179 io_work->qedf = fp->qedf;
2180 io_work->fp = NULL; /* Only used for unsolicited frames */
2181
2182 queue_work_on(cpu, qedf_io_wq, &io_work->work);
2183
2184 inc_idx:
2185 que->cq_cons_idx++;
2186 if (que->cq_cons_idx == fp->cq_num_entries)
2187 que->cq_cons_idx = 0;
2188 new_cqes--;
2189 }
2190
2191 return true;
2192 }
2193
2194
2195 /* MSI-X fastpath handler code */
2196 static irqreturn_t qedf_msix_handler(int irq, void *dev_id)
2197 {
2198 struct qedf_fastpath *fp = dev_id;
2199
2200 if (!fp) {
2201 QEDF_ERR(NULL, "fp is null.\n");
2202 return IRQ_HANDLED;
2203 }
2204 if (!fp->sb_info) {
2205 QEDF_ERR(NULL, "fp->sb_info in null.");
2206 return IRQ_HANDLED;
2207 }
2208
2209 /*
2210 * Disable interrupts for this status block while we process new
2211 * completions
2212 */
2213 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);
2214
2215 while (1) {
2216 qedf_process_completions(fp);
2217
2218 if (qedf_fp_has_work(fp) == 0) {
2219 /* Update the sb information */
2220 qed_sb_update_sb_idx(fp->sb_info);
2221
2222 /* Check for more work */
2223 rmb();
2224
2225 if (qedf_fp_has_work(fp) == 0) {
2226 /* Re-enable interrupts */
2227 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
2228 return IRQ_HANDLED;
2229 }
2230 }
2231 }
2232
2233 /* Do we ever want to break out of above loop? */
2234 return IRQ_HANDLED;
2235 }
2236
2237 /* simd handler for MSI/INTa */
2238 static void qedf_simd_int_handler(void *cookie)
2239 {
2240 /* Cookie is qedf_ctx struct */
2241 struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
2242
2243 QEDF_WARN(&(qedf->dbg_ctx), "qedf=%p.\n", qedf);
2244 }
2245
2246 #define QEDF_SIMD_HANDLER_NUM 0
2247 static void qedf_sync_free_irqs(struct qedf_ctx *qedf)
2248 {
2249 int i;
2250 u16 vector_idx = 0;
2251 u32 vector;
2252
2253 if (qedf->int_info.msix_cnt) {
2254 for (i = 0; i < qedf->int_info.used_cnt; i++) {
2255 vector_idx = i * qedf->dev_info.common.num_hwfns +
2256 qed_ops->common->get_affin_hwfn_idx(qedf->cdev);
2257 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
2258 "Freeing IRQ #%d vector_idx=%d.\n",
2259 i, vector_idx);
2260 vector = qedf->int_info.msix[vector_idx].vector;
2261 synchronize_irq(vector);
2262 irq_set_affinity_hint(vector, NULL);
2263 irq_set_affinity_notifier(vector, NULL);
2264 free_irq(vector, &qedf->fp_array[i]);
2265 }
2266 } else
2267 qed_ops->common->simd_handler_clean(qedf->cdev,
2268 QEDF_SIMD_HANDLER_NUM);
2269
2270 qedf->int_info.used_cnt = 0;
2271 qed_ops->common->set_fp_int(qedf->cdev, 0);
2272 }
2273
2274 static int qedf_request_msix_irq(struct qedf_ctx *qedf)
2275 {
2276 int i, rc, cpu;
2277 u16 vector_idx = 0;
2278 u32 vector;
2279
2280 cpu = cpumask_first(cpu_online_mask);
2281 for (i = 0; i < qedf->num_queues; i++) {
2282 vector_idx = i * qedf->dev_info.common.num_hwfns +
2283 qed_ops->common->get_affin_hwfn_idx(qedf->cdev);
2284 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
2285 "Requesting IRQ #%d vector_idx=%d.\n",
2286 i, vector_idx);
2287 vector = qedf->int_info.msix[vector_idx].vector;
2288 rc = request_irq(vector, qedf_msix_handler, 0, "qedf",
2289 &qedf->fp_array[i]);
2290
2291 if (rc) {
2292 QEDF_WARN(&(qedf->dbg_ctx), "request_irq failed.\n");
2293 qedf_sync_free_irqs(qedf);
2294 return rc;
2295 }
2296
2297 qedf->int_info.used_cnt++;
2298 rc = irq_set_affinity_hint(vector, get_cpu_mask(cpu));
2299 cpu = cpumask_next(cpu, cpu_online_mask);
2300 }
2301
2302 return 0;
2303 }
2304
2305 static int qedf_setup_int(struct qedf_ctx *qedf)
2306 {
2307 int rc = 0;
2308
2309 /*
2310 * Learn interrupt configuration
2311 */
2312 rc = qed_ops->common->set_fp_int(qedf->cdev, num_online_cpus());
2313 if (rc <= 0)
2314 return 0;
2315
2316 rc = qed_ops->common->get_fp_int(qedf->cdev, &qedf->int_info);
2317 if (rc)
2318 return 0;
2319
2320 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of msix_cnt = "
2321 "0x%x num of cpus = 0x%x\n", qedf->int_info.msix_cnt,
2322 num_online_cpus());
2323
2324 if (qedf->int_info.msix_cnt)
2325 return qedf_request_msix_irq(qedf);
2326
2327 qed_ops->common->simd_handler_config(qedf->cdev, &qedf,
2328 QEDF_SIMD_HANDLER_NUM, qedf_simd_int_handler);
2329 qedf->int_info.used_cnt = 1;
2330
2331 QEDF_ERR(&qedf->dbg_ctx,
2332 "Cannot load driver due to a lack of MSI-X vectors.\n");
2333 return -EINVAL;
2334 }
2335
2336 /* Main function for libfc frame reception */
2337 static void qedf_recv_frame(struct qedf_ctx *qedf,
2338 struct sk_buff *skb)
2339 {
2340 u32 fr_len;
2341 struct fc_lport *lport;
2342 struct fc_frame_header *fh;
2343 struct fcoe_crc_eof crc_eof;
2344 struct fc_frame *fp;
2345 u8 *mac = NULL;
2346 u8 *dest_mac = NULL;
2347 struct fcoe_hdr *hp;
2348 struct qedf_rport *fcport;
2349 struct fc_lport *vn_port;
2350 u32 f_ctl;
2351
2352 lport = qedf->lport;
2353 if (lport == NULL || lport->state == LPORT_ST_DISABLED) {
2354 QEDF_WARN(NULL, "Invalid lport struct or lport disabled.\n");
2355 kfree_skb(skb);
2356 return;
2357 }
2358
2359 if (skb_is_nonlinear(skb))
2360 skb_linearize(skb);
2361 mac = eth_hdr(skb)->h_source;
2362 dest_mac = eth_hdr(skb)->h_dest;
2363
2364 /* Pull the header */
2365 hp = (struct fcoe_hdr *)skb->data;
2366 fh = (struct fc_frame_header *) skb_transport_header(skb);
2367 skb_pull(skb, sizeof(struct fcoe_hdr));
2368 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
2369
2370 fp = (struct fc_frame *)skb;
2371 fc_frame_init(fp);
2372 fr_dev(fp) = lport;
2373 fr_sof(fp) = hp->fcoe_sof;
2374 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
2375 QEDF_INFO(NULL, QEDF_LOG_LL2, "skb_copy_bits failed.\n");
2376 kfree_skb(skb);
2377 return;
2378 }
2379 fr_eof(fp) = crc_eof.fcoe_eof;
2380 fr_crc(fp) = crc_eof.fcoe_crc32;
2381 if (pskb_trim(skb, fr_len)) {
2382 QEDF_INFO(NULL, QEDF_LOG_LL2, "pskb_trim failed.\n");
2383 kfree_skb(skb);
2384 return;
2385 }
2386
2387 fh = fc_frame_header_get(fp);
2388
2389 /*
2390 * Invalid frame filters.
2391 */
2392
2393 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
2394 fh->fh_type == FC_TYPE_FCP) {
2395 /* Drop FCP data. We dont this in L2 path */
2396 kfree_skb(skb);
2397 return;
2398 }
2399 if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
2400 fh->fh_type == FC_TYPE_ELS) {
2401 switch (fc_frame_payload_op(fp)) {
2402 case ELS_LOGO:
2403 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
2404 /* drop non-FIP LOGO */
2405 kfree_skb(skb);
2406 return;
2407 }
2408 break;
2409 }
2410 }
2411
2412 if (fh->fh_r_ctl == FC_RCTL_BA_ABTS) {
2413 /* Drop incoming ABTS */
2414 kfree_skb(skb);
2415 return;
2416 }
2417
2418 if (ntoh24(&dest_mac[3]) != ntoh24(fh->fh_d_id)) {
2419 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2420 "FC frame d_id mismatch with MAC %pM.\n", dest_mac);
2421 kfree_skb(skb);
2422 return;
2423 }
2424
2425 if (qedf->ctlr.state) {
2426 if (!ether_addr_equal(mac, qedf->ctlr.dest_addr)) {
2427 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2428 "Wrong source address: mac:%pM dest_addr:%pM.\n",
2429 mac, qedf->ctlr.dest_addr);
2430 kfree_skb(skb);
2431 return;
2432 }
2433 }
2434
2435 vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
2436
2437 /*
2438 * If the destination ID from the frame header does not match what we
2439 * have on record for lport and the search for a NPIV port came up
2440 * empty then this is not addressed to our port so simply drop it.
2441 */
2442 if (lport->port_id != ntoh24(fh->fh_d_id) && !vn_port) {
2443 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
2444 "Dropping frame due to destination mismatch: lport->port_id=0x%x fh->d_id=0x%x.\n",
2445 lport->port_id, ntoh24(fh->fh_d_id));
2446 kfree_skb(skb);
2447 return;
2448 }
2449
2450 f_ctl = ntoh24(fh->fh_f_ctl);
2451 if ((fh->fh_type == FC_TYPE_BLS) && (f_ctl & FC_FC_SEQ_CTX) &&
2452 (f_ctl & FC_FC_EX_CTX)) {
2453 /* Drop incoming ABTS response that has both SEQ/EX CTX set */
2454 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
2455 "Dropping ABTS response as both SEQ/EX CTX set.\n");
2456 kfree_skb(skb);
2457 return;
2458 }
2459
2460 /*
2461 * If a connection is uploading, drop incoming FCoE frames as there
2462 * is a small window where we could try to return a frame while libfc
2463 * is trying to clean things up.
2464 */
2465
2466 /* Get fcport associated with d_id if it exists */
2467 fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
2468
2469 if (fcport && test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
2470 &fcport->flags)) {
2471 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2472 "Connection uploading, dropping fp=%p.\n", fp);
2473 kfree_skb(skb);
2474 return;
2475 }
2476
2477 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame receive: "
2478 "skb=%p fp=%p src=%06x dest=%06x r_ctl=%x fh_type=%x.\n", skb, fp,
2479 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl,
2480 fh->fh_type);
2481 if (qedf_dump_frames)
2482 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
2483 1, skb->data, skb->len, false);
2484 fc_exch_recv(lport, fp);
2485 }
2486
2487 static void qedf_ll2_process_skb(struct work_struct *work)
2488 {
2489 struct qedf_skb_work *skb_work =
2490 container_of(work, struct qedf_skb_work, work);
2491 struct qedf_ctx *qedf = skb_work->qedf;
2492 struct sk_buff *skb = skb_work->skb;
2493 struct ethhdr *eh;
2494
2495 if (!qedf) {
2496 QEDF_ERR(NULL, "qedf is NULL\n");
2497 goto err_out;
2498 }
2499
2500 eh = (struct ethhdr *)skb->data;
2501
2502 /* Undo VLAN encapsulation */
2503 if (eh->h_proto == htons(ETH_P_8021Q)) {
2504 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
2505 eh = skb_pull(skb, VLAN_HLEN);
2506 skb_reset_mac_header(skb);
2507 }
2508
2509 /*
2510 * Process either a FIP frame or FCoE frame based on the
2511 * protocol value. If it's not either just drop the
2512 * frame.
2513 */
2514 if (eh->h_proto == htons(ETH_P_FIP)) {
2515 qedf_fip_recv(qedf, skb);
2516 goto out;
2517 } else if (eh->h_proto == htons(ETH_P_FCOE)) {
2518 __skb_pull(skb, ETH_HLEN);
2519 qedf_recv_frame(qedf, skb);
2520 goto out;
2521 } else
2522 goto err_out;
2523
2524 err_out:
2525 kfree_skb(skb);
2526 out:
2527 kfree(skb_work);
2528 return;
2529 }
2530
2531 static int qedf_ll2_rx(void *cookie, struct sk_buff *skb,
2532 u32 arg1, u32 arg2)
2533 {
2534 struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
2535 struct qedf_skb_work *skb_work;
2536
2537 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
2538 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
2539 "Dropping frame as link state is down.\n");
2540 kfree_skb(skb);
2541 return 0;
2542 }
2543
2544 skb_work = kzalloc(sizeof(struct qedf_skb_work), GFP_ATOMIC);
2545 if (!skb_work) {
2546 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate skb_work so "
2547 "dropping frame.\n");
2548 kfree_skb(skb);
2549 return 0;
2550 }
2551
2552 INIT_WORK(&skb_work->work, qedf_ll2_process_skb);
2553 skb_work->skb = skb;
2554 skb_work->qedf = qedf;
2555 queue_work(qedf->ll2_recv_wq, &skb_work->work);
2556
2557 return 0;
2558 }
2559
2560 static struct qed_ll2_cb_ops qedf_ll2_cb_ops = {
2561 .rx_cb = qedf_ll2_rx,
2562 .tx_cb = NULL,
2563 };
2564
2565 /* Main thread to process I/O completions */
2566 void qedf_fp_io_handler(struct work_struct *work)
2567 {
2568 struct qedf_io_work *io_work =
2569 container_of(work, struct qedf_io_work, work);
2570 u32 comp_type;
2571
2572 /*
2573 * Deferred part of unsolicited CQE sends
2574 * frame to libfc.
2575 */
2576 comp_type = (io_work->cqe.cqe_data >>
2577 FCOE_CQE_CQE_TYPE_SHIFT) &
2578 FCOE_CQE_CQE_TYPE_MASK;
2579 if (comp_type == FCOE_UNSOLIC_CQE_TYPE &&
2580 io_work->fp)
2581 fc_exch_recv(io_work->qedf->lport, io_work->fp);
2582 else
2583 qedf_process_cqe(io_work->qedf, &io_work->cqe);
2584
2585 kfree(io_work);
2586 }
2587
2588 static int qedf_alloc_and_init_sb(struct qedf_ctx *qedf,
2589 struct qed_sb_info *sb_info, u16 sb_id)
2590 {
2591 struct status_block_e4 *sb_virt;
2592 dma_addr_t sb_phys;
2593 int ret;
2594
2595 sb_virt = dma_alloc_coherent(&qedf->pdev->dev,
2596 sizeof(struct status_block_e4), &sb_phys, GFP_KERNEL);
2597
2598 if (!sb_virt) {
2599 QEDF_ERR(&qedf->dbg_ctx,
2600 "Status block allocation failed for id = %d.\n",
2601 sb_id);
2602 return -ENOMEM;
2603 }
2604
2605 ret = qed_ops->common->sb_init(qedf->cdev, sb_info, sb_virt, sb_phys,
2606 sb_id, QED_SB_TYPE_STORAGE);
2607
2608 if (ret) {
2609 QEDF_ERR(&qedf->dbg_ctx,
2610 "Status block initialization failed (0x%x) for id = %d.\n",
2611 ret, sb_id);
2612 return ret;
2613 }
2614
2615 return 0;
2616 }
2617
2618 static void qedf_free_sb(struct qedf_ctx *qedf, struct qed_sb_info *sb_info)
2619 {
2620 if (sb_info->sb_virt)
2621 dma_free_coherent(&qedf->pdev->dev, sizeof(*sb_info->sb_virt),
2622 (void *)sb_info->sb_virt, sb_info->sb_phys);
2623 }
2624
2625 static void qedf_destroy_sb(struct qedf_ctx *qedf)
2626 {
2627 int id;
2628 struct qedf_fastpath *fp = NULL;
2629
2630 for (id = 0; id < qedf->num_queues; id++) {
2631 fp = &(qedf->fp_array[id]);
2632 if (fp->sb_id == QEDF_SB_ID_NULL)
2633 break;
2634 qedf_free_sb(qedf, fp->sb_info);
2635 kfree(fp->sb_info);
2636 }
2637 kfree(qedf->fp_array);
2638 }
2639
2640 static int qedf_prepare_sb(struct qedf_ctx *qedf)
2641 {
2642 int id;
2643 struct qedf_fastpath *fp;
2644 int ret;
2645
2646 qedf->fp_array =
2647 kcalloc(qedf->num_queues, sizeof(struct qedf_fastpath),
2648 GFP_KERNEL);
2649
2650 if (!qedf->fp_array) {
2651 QEDF_ERR(&(qedf->dbg_ctx), "fastpath array allocation "
2652 "failed.\n");
2653 return -ENOMEM;
2654 }
2655
2656 for (id = 0; id < qedf->num_queues; id++) {
2657 fp = &(qedf->fp_array[id]);
2658 fp->sb_id = QEDF_SB_ID_NULL;
2659 fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
2660 if (!fp->sb_info) {
2661 QEDF_ERR(&(qedf->dbg_ctx), "SB info struct "
2662 "allocation failed.\n");
2663 goto err;
2664 }
2665 ret = qedf_alloc_and_init_sb(qedf, fp->sb_info, id);
2666 if (ret) {
2667 QEDF_ERR(&(qedf->dbg_ctx), "SB allocation and "
2668 "initialization failed.\n");
2669 goto err;
2670 }
2671 fp->sb_id = id;
2672 fp->qedf = qedf;
2673 fp->cq_num_entries =
2674 qedf->global_queues[id]->cq_mem_size /
2675 sizeof(struct fcoe_cqe);
2676 }
2677 err:
2678 return 0;
2679 }
2680
2681 void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
2682 {
2683 u16 xid;
2684 struct qedf_ioreq *io_req;
2685 struct qedf_rport *fcport;
2686 u32 comp_type;
2687
2688 comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
2689 FCOE_CQE_CQE_TYPE_MASK;
2690
2691 xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
2692 io_req = &qedf->cmd_mgr->cmds[xid];
2693
2694 /* Completion not for a valid I/O anymore so just return */
2695 if (!io_req) {
2696 QEDF_ERR(&qedf->dbg_ctx,
2697 "io_req is NULL for xid=0x%x.\n", xid);
2698 return;
2699 }
2700
2701 fcport = io_req->fcport;
2702
2703 if (fcport == NULL) {
2704 QEDF_ERR(&qedf->dbg_ctx,
2705 "fcport is NULL for xid=0x%x io_req=%p.\n",
2706 xid, io_req);
2707 return;
2708 }
2709
2710 /*
2711 * Check that fcport is offloaded. If it isn't then the spinlock
2712 * isn't valid and shouldn't be taken. We should just return.
2713 */
2714 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
2715 QEDF_ERR(&qedf->dbg_ctx,
2716 "Session not offloaded yet, fcport = %p.\n", fcport);
2717 return;
2718 }
2719
2720
2721 switch (comp_type) {
2722 case FCOE_GOOD_COMPLETION_CQE_TYPE:
2723 atomic_inc(&fcport->free_sqes);
2724 switch (io_req->cmd_type) {
2725 case QEDF_SCSI_CMD:
2726 qedf_scsi_completion(qedf, cqe, io_req);
2727 break;
2728 case QEDF_ELS:
2729 qedf_process_els_compl(qedf, cqe, io_req);
2730 break;
2731 case QEDF_TASK_MGMT_CMD:
2732 qedf_process_tmf_compl(qedf, cqe, io_req);
2733 break;
2734 case QEDF_SEQ_CLEANUP:
2735 qedf_process_seq_cleanup_compl(qedf, cqe, io_req);
2736 break;
2737 }
2738 break;
2739 case FCOE_ERROR_DETECTION_CQE_TYPE:
2740 atomic_inc(&fcport->free_sqes);
2741 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2742 "Error detect CQE.\n");
2743 qedf_process_error_detect(qedf, cqe, io_req);
2744 break;
2745 case FCOE_EXCH_CLEANUP_CQE_TYPE:
2746 atomic_inc(&fcport->free_sqes);
2747 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2748 "Cleanup CQE.\n");
2749 qedf_process_cleanup_compl(qedf, cqe, io_req);
2750 break;
2751 case FCOE_ABTS_CQE_TYPE:
2752 atomic_inc(&fcport->free_sqes);
2753 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2754 "Abort CQE.\n");
2755 qedf_process_abts_compl(qedf, cqe, io_req);
2756 break;
2757 case FCOE_DUMMY_CQE_TYPE:
2758 atomic_inc(&fcport->free_sqes);
2759 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2760 "Dummy CQE.\n");
2761 break;
2762 case FCOE_LOCAL_COMP_CQE_TYPE:
2763 atomic_inc(&fcport->free_sqes);
2764 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2765 "Local completion CQE.\n");
2766 break;
2767 case FCOE_WARNING_CQE_TYPE:
2768 atomic_inc(&fcport->free_sqes);
2769 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2770 "Warning CQE.\n");
2771 qedf_process_warning_compl(qedf, cqe, io_req);
2772 break;
2773 case MAX_FCOE_CQE_TYPE:
2774 atomic_inc(&fcport->free_sqes);
2775 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2776 "Max FCoE CQE.\n");
2777 break;
2778 default:
2779 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2780 "Default CQE.\n");
2781 break;
2782 }
2783 }
2784
2785 static void qedf_free_bdq(struct qedf_ctx *qedf)
2786 {
2787 int i;
2788
2789 if (qedf->bdq_pbl_list)
2790 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
2791 qedf->bdq_pbl_list, qedf->bdq_pbl_list_dma);
2792
2793 if (qedf->bdq_pbl)
2794 dma_free_coherent(&qedf->pdev->dev, qedf->bdq_pbl_mem_size,
2795 qedf->bdq_pbl, qedf->bdq_pbl_dma);
2796
2797 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2798 if (qedf->bdq[i].buf_addr) {
2799 dma_free_coherent(&qedf->pdev->dev, QEDF_BDQ_BUF_SIZE,
2800 qedf->bdq[i].buf_addr, qedf->bdq[i].buf_dma);
2801 }
2802 }
2803 }
2804
2805 static void qedf_free_global_queues(struct qedf_ctx *qedf)
2806 {
2807 int i;
2808 struct global_queue **gl = qedf->global_queues;
2809
2810 for (i = 0; i < qedf->num_queues; i++) {
2811 if (!gl[i])
2812 continue;
2813
2814 if (gl[i]->cq)
2815 dma_free_coherent(&qedf->pdev->dev,
2816 gl[i]->cq_mem_size, gl[i]->cq, gl[i]->cq_dma);
2817 if (gl[i]->cq_pbl)
2818 dma_free_coherent(&qedf->pdev->dev, gl[i]->cq_pbl_size,
2819 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
2820
2821 kfree(gl[i]);
2822 }
2823
2824 qedf_free_bdq(qedf);
2825 }
2826
2827 static int qedf_alloc_bdq(struct qedf_ctx *qedf)
2828 {
2829 int i;
2830 struct scsi_bd *pbl;
2831 u64 *list;
2832 dma_addr_t page;
2833
2834 /* Alloc dma memory for BDQ buffers */
2835 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2836 qedf->bdq[i].buf_addr = dma_alloc_coherent(&qedf->pdev->dev,
2837 QEDF_BDQ_BUF_SIZE, &qedf->bdq[i].buf_dma, GFP_KERNEL);
2838 if (!qedf->bdq[i].buf_addr) {
2839 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ "
2840 "buffer %d.\n", i);
2841 return -ENOMEM;
2842 }
2843 }
2844
2845 /* Alloc dma memory for BDQ page buffer list */
2846 qedf->bdq_pbl_mem_size =
2847 QEDF_BDQ_SIZE * sizeof(struct scsi_bd);
2848 qedf->bdq_pbl_mem_size =
2849 ALIGN(qedf->bdq_pbl_mem_size, QEDF_PAGE_SIZE);
2850
2851 qedf->bdq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
2852 qedf->bdq_pbl_mem_size, &qedf->bdq_pbl_dma, GFP_KERNEL);
2853 if (!qedf->bdq_pbl) {
2854 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ PBL.\n");
2855 return -ENOMEM;
2856 }
2857
2858 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2859 "BDQ PBL addr=0x%p dma=%pad\n",
2860 qedf->bdq_pbl, &qedf->bdq_pbl_dma);
2861
2862 /*
2863 * Populate BDQ PBL with physical and virtual address of individual
2864 * BDQ buffers
2865 */
2866 pbl = (struct scsi_bd *)qedf->bdq_pbl;
2867 for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2868 pbl->address.hi = cpu_to_le32(U64_HI(qedf->bdq[i].buf_dma));
2869 pbl->address.lo = cpu_to_le32(U64_LO(qedf->bdq[i].buf_dma));
2870 pbl->opaque.fcoe_opaque.hi = 0;
2871 /* Opaque lo data is an index into the BDQ array */
2872 pbl->opaque.fcoe_opaque.lo = cpu_to_le32(i);
2873 pbl++;
2874 }
2875
2876 /* Allocate list of PBL pages */
2877 qedf->bdq_pbl_list = dma_alloc_coherent(&qedf->pdev->dev,
2878 QEDF_PAGE_SIZE,
2879 &qedf->bdq_pbl_list_dma,
2880 GFP_KERNEL);
2881 if (!qedf->bdq_pbl_list) {
2882 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate list of PBL pages.\n");
2883 return -ENOMEM;
2884 }
2885
2886 /*
2887 * Now populate PBL list with pages that contain pointers to the
2888 * individual buffers.
2889 */
2890 qedf->bdq_pbl_list_num_entries = qedf->bdq_pbl_mem_size /
2891 QEDF_PAGE_SIZE;
2892 list = (u64 *)qedf->bdq_pbl_list;
2893 page = qedf->bdq_pbl_list_dma;
2894 for (i = 0; i < qedf->bdq_pbl_list_num_entries; i++) {
2895 *list = qedf->bdq_pbl_dma;
2896 list++;
2897 page += QEDF_PAGE_SIZE;
2898 }
2899
2900 return 0;
2901 }
2902
2903 static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
2904 {
2905 u32 *list;
2906 int i;
2907 int status = 0, rc;
2908 u32 *pbl;
2909 dma_addr_t page;
2910 int num_pages;
2911
2912 /* Allocate and map CQs, RQs */
2913 /*
2914 * Number of global queues (CQ / RQ). This should
2915 * be <= number of available MSIX vectors for the PF
2916 */
2917 if (!qedf->num_queues) {
2918 QEDF_ERR(&(qedf->dbg_ctx), "No MSI-X vectors available!\n");
2919 return 1;
2920 }
2921
2922 /*
2923 * Make sure we allocated the PBL that will contain the physical
2924 * addresses of our queues
2925 */
2926 if (!qedf->p_cpuq) {
2927 status = 1;
2928 QEDF_ERR(&qedf->dbg_ctx, "p_cpuq is NULL.\n");
2929 goto mem_alloc_failure;
2930 }
2931
2932 qedf->global_queues = kzalloc((sizeof(struct global_queue *)
2933 * qedf->num_queues), GFP_KERNEL);
2934 if (!qedf->global_queues) {
2935 QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate global "
2936 "queues array ptr memory\n");
2937 return -ENOMEM;
2938 }
2939 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2940 "qedf->global_queues=%p.\n", qedf->global_queues);
2941
2942 /* Allocate DMA coherent buffers for BDQ */
2943 rc = qedf_alloc_bdq(qedf);
2944 if (rc) {
2945 QEDF_ERR(&qedf->dbg_ctx, "Unable to allocate bdq.\n");
2946 goto mem_alloc_failure;
2947 }
2948
2949 /* Allocate a CQ and an associated PBL for each MSI-X vector */
2950 for (i = 0; i < qedf->num_queues; i++) {
2951 qedf->global_queues[i] = kzalloc(sizeof(struct global_queue),
2952 GFP_KERNEL);
2953 if (!qedf->global_queues[i]) {
2954 QEDF_WARN(&(qedf->dbg_ctx), "Unable to allocate "
2955 "global queue %d.\n", i);
2956 status = -ENOMEM;
2957 goto mem_alloc_failure;
2958 }
2959
2960 qedf->global_queues[i]->cq_mem_size =
2961 FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
2962 qedf->global_queues[i]->cq_mem_size =
2963 ALIGN(qedf->global_queues[i]->cq_mem_size, QEDF_PAGE_SIZE);
2964
2965 qedf->global_queues[i]->cq_pbl_size =
2966 (qedf->global_queues[i]->cq_mem_size /
2967 PAGE_SIZE) * sizeof(void *);
2968 qedf->global_queues[i]->cq_pbl_size =
2969 ALIGN(qedf->global_queues[i]->cq_pbl_size, QEDF_PAGE_SIZE);
2970
2971 qedf->global_queues[i]->cq =
2972 dma_alloc_coherent(&qedf->pdev->dev,
2973 qedf->global_queues[i]->cq_mem_size,
2974 &qedf->global_queues[i]->cq_dma,
2975 GFP_KERNEL);
2976
2977 if (!qedf->global_queues[i]->cq) {
2978 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq.\n");
2979 status = -ENOMEM;
2980 goto mem_alloc_failure;
2981 }
2982
2983 qedf->global_queues[i]->cq_pbl =
2984 dma_alloc_coherent(&qedf->pdev->dev,
2985 qedf->global_queues[i]->cq_pbl_size,
2986 &qedf->global_queues[i]->cq_pbl_dma,
2987 GFP_KERNEL);
2988
2989 if (!qedf->global_queues[i]->cq_pbl) {
2990 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq PBL.\n");
2991 status = -ENOMEM;
2992 goto mem_alloc_failure;
2993 }
2994
2995 /* Create PBL */
2996 num_pages = qedf->global_queues[i]->cq_mem_size /
2997 QEDF_PAGE_SIZE;
2998 page = qedf->global_queues[i]->cq_dma;
2999 pbl = (u32 *)qedf->global_queues[i]->cq_pbl;
3000
3001 while (num_pages--) {
3002 *pbl = U64_LO(page);
3003 pbl++;
3004 *pbl = U64_HI(page);
3005 pbl++;
3006 page += QEDF_PAGE_SIZE;
3007 }
3008 /* Set the initial consumer index for cq */
3009 qedf->global_queues[i]->cq_cons_idx = 0;
3010 }
3011
3012 list = (u32 *)qedf->p_cpuq;
3013
3014 /*
3015 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
3016 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
3017 * to the physical address which contains an array of pointers to
3018 * the physical addresses of the specific queue pages.
3019 */
3020 for (i = 0; i < qedf->num_queues; i++) {
3021 *list = U64_LO(qedf->global_queues[i]->cq_pbl_dma);
3022 list++;
3023 *list = U64_HI(qedf->global_queues[i]->cq_pbl_dma);
3024 list++;
3025 *list = U64_LO(0);
3026 list++;
3027 *list = U64_HI(0);
3028 list++;
3029 }
3030
3031 return 0;
3032
3033 mem_alloc_failure:
3034 qedf_free_global_queues(qedf);
3035 return status;
3036 }
3037
3038 static int qedf_set_fcoe_pf_param(struct qedf_ctx *qedf)
3039 {
3040 u8 sq_num_pbl_pages;
3041 u32 sq_mem_size;
3042 u32 cq_mem_size;
3043 u32 cq_num_entries;
3044 int rval;
3045
3046 /*
3047 * The number of completion queues/fastpath interrupts/status blocks
3048 * we allocation is the minimum off:
3049 *
3050 * Number of CPUs
3051 * Number allocated by qed for our PCI function
3052 */
3053 qedf->num_queues = MIN_NUM_CPUS_MSIX(qedf);
3054
3055 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of CQs is %d.\n",
3056 qedf->num_queues);
3057
3058 qedf->p_cpuq = dma_alloc_coherent(&qedf->pdev->dev,
3059 qedf->num_queues * sizeof(struct qedf_glbl_q_params),
3060 &qedf->hw_p_cpuq, GFP_KERNEL);
3061
3062 if (!qedf->p_cpuq) {
3063 QEDF_ERR(&(qedf->dbg_ctx), "dma_alloc_coherent failed.\n");
3064 return 1;
3065 }
3066
3067 rval = qedf_alloc_global_queues(qedf);
3068 if (rval) {
3069 QEDF_ERR(&(qedf->dbg_ctx), "Global queue allocation "
3070 "failed.\n");
3071 return 1;
3072 }
3073
3074 /* Calculate SQ PBL size in the same manner as in qedf_sq_alloc() */
3075 sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
3076 sq_mem_size = ALIGN(sq_mem_size, QEDF_PAGE_SIZE);
3077 sq_num_pbl_pages = (sq_mem_size / QEDF_PAGE_SIZE);
3078
3079 /* Calculate CQ num entries */
3080 cq_mem_size = FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
3081 cq_mem_size = ALIGN(cq_mem_size, QEDF_PAGE_SIZE);
3082 cq_num_entries = cq_mem_size / sizeof(struct fcoe_cqe);
3083
3084 memset(&(qedf->pf_params), 0, sizeof(qedf->pf_params));
3085
3086 /* Setup the value for fcoe PF */
3087 qedf->pf_params.fcoe_pf_params.num_cons = QEDF_MAX_SESSIONS;
3088 qedf->pf_params.fcoe_pf_params.num_tasks = FCOE_PARAMS_NUM_TASKS;
3089 qedf->pf_params.fcoe_pf_params.glbl_q_params_addr =
3090 (u64)qedf->hw_p_cpuq;
3091 qedf->pf_params.fcoe_pf_params.sq_num_pbl_pages = sq_num_pbl_pages;
3092
3093 qedf->pf_params.fcoe_pf_params.rq_buffer_log_size = 0;
3094
3095 qedf->pf_params.fcoe_pf_params.cq_num_entries = cq_num_entries;
3096 qedf->pf_params.fcoe_pf_params.num_cqs = qedf->num_queues;
3097
3098 /* log_page_size: 12 for 4KB pages */
3099 qedf->pf_params.fcoe_pf_params.log_page_size = ilog2(QEDF_PAGE_SIZE);
3100
3101 qedf->pf_params.fcoe_pf_params.mtu = 9000;
3102 qedf->pf_params.fcoe_pf_params.gl_rq_pi = QEDF_FCOE_PARAMS_GL_RQ_PI;
3103 qedf->pf_params.fcoe_pf_params.gl_cmd_pi = QEDF_FCOE_PARAMS_GL_CMD_PI;
3104
3105 /* BDQ address and size */
3106 qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0] =
3107 qedf->bdq_pbl_list_dma;
3108 qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0] =
3109 qedf->bdq_pbl_list_num_entries;
3110 qedf->pf_params.fcoe_pf_params.rq_buffer_size = QEDF_BDQ_BUF_SIZE;
3111
3112 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3113 "bdq_list=%p bdq_pbl_list_dma=%llx bdq_pbl_list_entries=%d.\n",
3114 qedf->bdq_pbl_list,
3115 qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0],
3116 qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0]);
3117
3118 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3119 "cq_num_entries=%d.\n",
3120 qedf->pf_params.fcoe_pf_params.cq_num_entries);
3121
3122 return 0;
3123 }
3124
3125 /* Free DMA coherent memory for array of queue pointers we pass to qed */
3126 static void qedf_free_fcoe_pf_param(struct qedf_ctx *qedf)
3127 {
3128 size_t size = 0;
3129
3130 if (qedf->p_cpuq) {
3131 size = qedf->num_queues * sizeof(struct qedf_glbl_q_params);
3132 dma_free_coherent(&qedf->pdev->dev, size, qedf->p_cpuq,
3133 qedf->hw_p_cpuq);
3134 }
3135
3136 qedf_free_global_queues(qedf);
3137
3138 kfree(qedf->global_queues);
3139 }
3140
3141 /*
3142 * PCI driver functions
3143 */
3144
3145 static const struct pci_device_id qedf_pci_tbl[] = {
3146 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165c) },
3147 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8080) },
3148 {0}
3149 };
3150 MODULE_DEVICE_TABLE(pci, qedf_pci_tbl);
3151
3152 static struct pci_driver qedf_pci_driver = {
3153 .name = QEDF_MODULE_NAME,
3154 .id_table = qedf_pci_tbl,
3155 .probe = qedf_probe,
3156 .remove = qedf_remove,
3157 .shutdown = qedf_shutdown,
3158 };
3159
3160 static int __qedf_probe(struct pci_dev *pdev, int mode)
3161 {
3162 int rc = -EINVAL;
3163 struct fc_lport *lport;
3164 struct qedf_ctx *qedf;
3165 struct Scsi_Host *host;
3166 bool is_vf = false;
3167 struct qed_ll2_params params;
3168 char host_buf[20];
3169 struct qed_link_params link_params;
3170 int status;
3171 void *task_start, *task_end;
3172 struct qed_slowpath_params slowpath_params;
3173 struct qed_probe_params qed_params;
3174 u16 tmp;
3175
3176 /*
3177 * When doing error recovery we didn't reap the lport so don't try
3178 * to reallocate it.
3179 */
3180 if (mode != QEDF_MODE_RECOVERY) {
3181 lport = libfc_host_alloc(&qedf_host_template,
3182 sizeof(struct qedf_ctx));
3183
3184 if (!lport) {
3185 QEDF_ERR(NULL, "Could not allocate lport.\n");
3186 rc = -ENOMEM;
3187 goto err0;
3188 }
3189
3190 fc_disc_init(lport);
3191
3192 /* Initialize qedf_ctx */
3193 qedf = lport_priv(lport);
3194 qedf->lport = lport;
3195 qedf->ctlr.lp = lport;
3196 qedf->pdev = pdev;
3197 qedf->dbg_ctx.pdev = pdev;
3198 qedf->dbg_ctx.host_no = lport->host->host_no;
3199 spin_lock_init(&qedf->hba_lock);
3200 INIT_LIST_HEAD(&qedf->fcports);
3201 qedf->curr_conn_id = QEDF_MAX_SESSIONS - 1;
3202 atomic_set(&qedf->num_offloads, 0);
3203 qedf->stop_io_on_error = false;
3204 pci_set_drvdata(pdev, qedf);
3205 init_completion(&qedf->fipvlan_compl);
3206 mutex_init(&qedf->stats_mutex);
3207 mutex_init(&qedf->flush_mutex);
3208
3209 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO,
3210 "QLogic FastLinQ FCoE Module qedf %s, "
3211 "FW %d.%d.%d.%d\n", QEDF_VERSION,
3212 FW_MAJOR_VERSION, FW_MINOR_VERSION, FW_REVISION_VERSION,
3213 FW_ENGINEERING_VERSION);
3214 } else {
3215 /* Init pointers during recovery */
3216 qedf = pci_get_drvdata(pdev);
3217 lport = qedf->lport;
3218 }
3219
3220 host = lport->host;
3221
3222 /* Allocate mempool for qedf_io_work structs */
3223 qedf->io_mempool = mempool_create_slab_pool(QEDF_IO_WORK_MIN,
3224 qedf_io_work_cache);
3225 if (qedf->io_mempool == NULL) {
3226 QEDF_ERR(&(qedf->dbg_ctx), "qedf->io_mempool is NULL.\n");
3227 goto err1;
3228 }
3229 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO, "qedf->io_mempool=%p.\n",
3230 qedf->io_mempool);
3231
3232 sprintf(host_buf, "qedf_%u_link",
3233 qedf->lport->host->host_no);
3234 qedf->link_update_wq = create_workqueue(host_buf);
3235 INIT_DELAYED_WORK(&qedf->link_update, qedf_handle_link_update);
3236 INIT_DELAYED_WORK(&qedf->link_recovery, qedf_link_recovery);
3237 INIT_DELAYED_WORK(&qedf->grcdump_work, qedf_wq_grcdump);
3238 qedf->fipvlan_retries = qedf_fipvlan_retries;
3239 /* Set a default prio in case DCBX doesn't converge */
3240 if (qedf_default_prio > -1) {
3241 /*
3242 * This is the case where we pass a modparam in so we want to
3243 * honor it even if dcbx doesn't converge.
3244 */
3245 qedf->prio = qedf_default_prio;
3246 } else
3247 qedf->prio = QEDF_DEFAULT_PRIO;
3248
3249 /*
3250 * Common probe. Takes care of basic hardware init and pci_*
3251 * functions.
3252 */
3253 memset(&qed_params, 0, sizeof(qed_params));
3254 qed_params.protocol = QED_PROTOCOL_FCOE;
3255 qed_params.dp_module = qedf_dp_module;
3256 qed_params.dp_level = qedf_dp_level;
3257 qed_params.is_vf = is_vf;
3258 qedf->cdev = qed_ops->common->probe(pdev, &qed_params);
3259 if (!qedf->cdev) {
3260 QEDF_ERR(&qedf->dbg_ctx, "common probe failed.\n");
3261 rc = -ENODEV;
3262 goto err1;
3263 }
3264
3265 /* Learn information crucial for qedf to progress */
3266 rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
3267 if (rc) {
3268 QEDF_ERR(&(qedf->dbg_ctx), "Failed to dev info.\n");
3269 goto err1;
3270 }
3271
3272 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
3273 "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
3274 qedf->dev_info.common.num_hwfns,
3275 qed_ops->common->get_affin_hwfn_idx(qedf->cdev));
3276
3277 /* queue allocation code should come here
3278 * order should be
3279 * slowpath_start
3280 * status block allocation
3281 * interrupt registration (to get min number of queues)
3282 * set_fcoe_pf_param
3283 * qed_sp_fcoe_func_start
3284 */
3285 rc = qedf_set_fcoe_pf_param(qedf);
3286 if (rc) {
3287 QEDF_ERR(&(qedf->dbg_ctx), "Cannot set fcoe pf param.\n");
3288 goto err2;
3289 }
3290 qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
3291
3292 /* Record BDQ producer doorbell addresses */
3293 qedf->bdq_primary_prod = qedf->dev_info.primary_dbq_rq_addr;
3294 qedf->bdq_secondary_prod = qedf->dev_info.secondary_bdq_rq_addr;
3295 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3296 "BDQ primary_prod=%p secondary_prod=%p.\n", qedf->bdq_primary_prod,
3297 qedf->bdq_secondary_prod);
3298
3299 qed_ops->register_ops(qedf->cdev, &qedf_cb_ops, qedf);
3300
3301 rc = qedf_prepare_sb(qedf);
3302 if (rc) {
3303
3304 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
3305 goto err2;
3306 }
3307
3308 /* Start the Slowpath-process */
3309 slowpath_params.int_mode = QED_INT_MODE_MSIX;
3310 slowpath_params.drv_major = QEDF_DRIVER_MAJOR_VER;
3311 slowpath_params.drv_minor = QEDF_DRIVER_MINOR_VER;
3312 slowpath_params.drv_rev = QEDF_DRIVER_REV_VER;
3313 slowpath_params.drv_eng = QEDF_DRIVER_ENG_VER;
3314 strncpy(slowpath_params.name, "qedf", QED_DRV_VER_STR_SIZE);
3315 rc = qed_ops->common->slowpath_start(qedf->cdev, &slowpath_params);
3316 if (rc) {
3317 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
3318 goto err2;
3319 }
3320
3321 /*
3322 * update_pf_params needs to be called before and after slowpath
3323 * start
3324 */
3325 qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
3326
3327 /* Setup interrupts */
3328 rc = qedf_setup_int(qedf);
3329 if (rc) {
3330 QEDF_ERR(&qedf->dbg_ctx, "Setup interrupts failed.\n");
3331 goto err3;
3332 }
3333
3334 rc = qed_ops->start(qedf->cdev, &qedf->tasks);
3335 if (rc) {
3336 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start FCoE function.\n");
3337 goto err4;
3338 }
3339 task_start = qedf_get_task_mem(&qedf->tasks, 0);
3340 task_end = qedf_get_task_mem(&qedf->tasks, MAX_TID_BLOCKS_FCOE - 1);
3341 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Task context start=%p, "
3342 "end=%p block_size=%u.\n", task_start, task_end,
3343 qedf->tasks.size);
3344
3345 /*
3346 * We need to write the number of BDs in the BDQ we've preallocated so
3347 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
3348 * packet arrives.
3349 */
3350 qedf->bdq_prod_idx = QEDF_BDQ_SIZE;
3351 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3352 "Writing %d to primary and secondary BDQ doorbell registers.\n",
3353 qedf->bdq_prod_idx);
3354 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod);
3355 tmp = readw(qedf->bdq_primary_prod);
3356 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod);
3357 tmp = readw(qedf->bdq_secondary_prod);
3358
3359 qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3360
3361 /* Now that the dev_info struct has been filled in set the MAC
3362 * address
3363 */
3364 ether_addr_copy(qedf->mac, qedf->dev_info.common.hw_mac);
3365 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "MAC address is %pM.\n",
3366 qedf->mac);
3367
3368 /*
3369 * Set the WWNN and WWPN in the following way:
3370 *
3371 * If the info we get from qed is non-zero then use that to set the
3372 * WWPN and WWNN. Otherwise fall back to use fcoe_wwn_from_mac() based
3373 * on the MAC address.
3374 */
3375 if (qedf->dev_info.wwnn != 0 && qedf->dev_info.wwpn != 0) {
3376 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3377 "Setting WWPN and WWNN from qed dev_info.\n");
3378 qedf->wwnn = qedf->dev_info.wwnn;
3379 qedf->wwpn = qedf->dev_info.wwpn;
3380 } else {
3381 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3382 "Setting WWPN and WWNN using fcoe_wwn_from_mac().\n");
3383 qedf->wwnn = fcoe_wwn_from_mac(qedf->mac, 1, 0);
3384 qedf->wwpn = fcoe_wwn_from_mac(qedf->mac, 2, 0);
3385 }
3386 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "WWNN=%016llx "
3387 "WWPN=%016llx.\n", qedf->wwnn, qedf->wwpn);
3388
3389 sprintf(host_buf, "host_%d", host->host_no);
3390 qed_ops->common->set_name(qedf->cdev, host_buf);
3391
3392 /* Allocate cmd mgr */
3393 qedf->cmd_mgr = qedf_cmd_mgr_alloc(qedf);
3394 if (!qedf->cmd_mgr) {
3395 QEDF_ERR(&(qedf->dbg_ctx), "Failed to allocate cmd mgr.\n");
3396 rc = -ENOMEM;
3397 goto err5;
3398 }
3399
3400 if (mode != QEDF_MODE_RECOVERY) {
3401 host->transportt = qedf_fc_transport_template;
3402 host->max_lun = qedf_max_lun;
3403 host->max_cmd_len = QEDF_MAX_CDB_LEN;
3404 host->can_queue = FCOE_PARAMS_NUM_TASKS;
3405 rc = scsi_add_host(host, &pdev->dev);
3406 if (rc) {
3407 QEDF_WARN(&qedf->dbg_ctx,
3408 "Error adding Scsi_Host rc=0x%x.\n", rc);
3409 goto err6;
3410 }
3411 }
3412
3413 memset(&params, 0, sizeof(params));
3414 params.mtu = QEDF_LL2_BUF_SIZE;
3415 ether_addr_copy(params.ll2_mac_address, qedf->mac);
3416
3417 /* Start LL2 processing thread */
3418 snprintf(host_buf, 20, "qedf_%d_ll2", host->host_no);
3419 qedf->ll2_recv_wq =
3420 create_workqueue(host_buf);
3421 if (!qedf->ll2_recv_wq) {
3422 QEDF_ERR(&(qedf->dbg_ctx), "Failed to LL2 workqueue.\n");
3423 rc = -ENOMEM;
3424 goto err7;
3425 }
3426
3427 #ifdef CONFIG_DEBUG_FS
3428 qedf_dbg_host_init(&(qedf->dbg_ctx), qedf_debugfs_ops,
3429 qedf_dbg_fops);
3430 #endif
3431
3432 /* Start LL2 */
3433 qed_ops->ll2->register_cb_ops(qedf->cdev, &qedf_ll2_cb_ops, qedf);
3434 rc = qed_ops->ll2->start(qedf->cdev, &params);
3435 if (rc) {
3436 QEDF_ERR(&(qedf->dbg_ctx), "Could not start Light L2.\n");
3437 goto err7;
3438 }
3439 set_bit(QEDF_LL2_STARTED, &qedf->flags);
3440
3441 /* Set initial FIP/FCoE VLAN to NULL */
3442 qedf->vlan_id = 0;
3443
3444 /*
3445 * No need to setup fcoe_ctlr or fc_lport objects during recovery since
3446 * they were not reaped during the unload process.
3447 */
3448 if (mode != QEDF_MODE_RECOVERY) {
3449 /* Setup imbedded fcoe controller */
3450 qedf_fcoe_ctlr_setup(qedf);
3451
3452 /* Setup lport */
3453 rc = qedf_lport_setup(qedf);
3454 if (rc) {
3455 QEDF_ERR(&(qedf->dbg_ctx),
3456 "qedf_lport_setup failed.\n");
3457 goto err7;
3458 }
3459 }
3460
3461 sprintf(host_buf, "qedf_%u_timer", qedf->lport->host->host_no);
3462 qedf->timer_work_queue =
3463 create_workqueue(host_buf);
3464 if (!qedf->timer_work_queue) {
3465 QEDF_ERR(&(qedf->dbg_ctx), "Failed to start timer "
3466 "workqueue.\n");
3467 rc = -ENOMEM;
3468 goto err7;
3469 }
3470
3471 /* DPC workqueue is not reaped during recovery unload */
3472 if (mode != QEDF_MODE_RECOVERY) {
3473 sprintf(host_buf, "qedf_%u_dpc",
3474 qedf->lport->host->host_no);
3475 qedf->dpc_wq = create_workqueue(host_buf);
3476 }
3477
3478 /*
3479 * GRC dump and sysfs parameters are not reaped during the recovery
3480 * unload process.
3481 */
3482 if (mode != QEDF_MODE_RECOVERY) {
3483 qedf->grcdump_size =
3484 qed_ops->common->dbg_all_data_size(qedf->cdev);
3485 if (qedf->grcdump_size) {
3486 rc = qedf_alloc_grc_dump_buf(&qedf->grcdump,
3487 qedf->grcdump_size);
3488 if (rc) {
3489 QEDF_ERR(&(qedf->dbg_ctx),
3490 "GRC Dump buffer alloc failed.\n");
3491 qedf->grcdump = NULL;
3492 }
3493
3494 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3495 "grcdump: addr=%p, size=%u.\n",
3496 qedf->grcdump, qedf->grcdump_size);
3497 }
3498 qedf_create_sysfs_ctx_attr(qedf);
3499
3500 /* Initialize I/O tracing for this adapter */
3501 spin_lock_init(&qedf->io_trace_lock);
3502 qedf->io_trace_idx = 0;
3503 }
3504
3505 init_completion(&qedf->flogi_compl);
3506
3507 status = qed_ops->common->update_drv_state(qedf->cdev, true);
3508 if (status)
3509 QEDF_ERR(&(qedf->dbg_ctx),
3510 "Failed to send drv state to MFW.\n");
3511
3512 memset(&link_params, 0, sizeof(struct qed_link_params));
3513 link_params.link_up = true;
3514 status = qed_ops->common->set_link(qedf->cdev, &link_params);
3515 if (status)
3516 QEDF_WARN(&(qedf->dbg_ctx), "set_link failed.\n");
3517
3518 /* Start/restart discovery */
3519 if (mode == QEDF_MODE_RECOVERY)
3520 fcoe_ctlr_link_up(&qedf->ctlr);
3521 else
3522 fc_fabric_login(lport);
3523
3524 /* All good */
3525 return 0;
3526
3527 err7:
3528 if (qedf->ll2_recv_wq)
3529 destroy_workqueue(qedf->ll2_recv_wq);
3530 fc_remove_host(qedf->lport->host);
3531 scsi_remove_host(qedf->lport->host);
3532 #ifdef CONFIG_DEBUG_FS
3533 qedf_dbg_host_exit(&(qedf->dbg_ctx));
3534 #endif
3535 err6:
3536 qedf_cmd_mgr_free(qedf->cmd_mgr);
3537 err5:
3538 qed_ops->stop(qedf->cdev);
3539 err4:
3540 qedf_free_fcoe_pf_param(qedf);
3541 qedf_sync_free_irqs(qedf);
3542 err3:
3543 qed_ops->common->slowpath_stop(qedf->cdev);
3544 err2:
3545 qed_ops->common->remove(qedf->cdev);
3546 err1:
3547 scsi_host_put(lport->host);
3548 err0:
3549 return rc;
3550 }
3551
3552 static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3553 {
3554 return __qedf_probe(pdev, QEDF_MODE_NORMAL);
3555 }
3556
3557 static void __qedf_remove(struct pci_dev *pdev, int mode)
3558 {
3559 struct qedf_ctx *qedf;
3560 int rc;
3561
3562 if (!pdev) {
3563 QEDF_ERR(NULL, "pdev is NULL.\n");
3564 return;
3565 }
3566
3567 qedf = pci_get_drvdata(pdev);
3568
3569 /*
3570 * Prevent race where we're in board disable work and then try to
3571 * rmmod the module.
3572 */
3573 if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
3574 QEDF_ERR(&qedf->dbg_ctx, "Already removing PCI function.\n");
3575 return;
3576 }
3577
3578 if (mode != QEDF_MODE_RECOVERY)
3579 set_bit(QEDF_UNLOADING, &qedf->flags);
3580
3581 /* Logoff the fabric to upload all connections */
3582 if (mode == QEDF_MODE_RECOVERY)
3583 fcoe_ctlr_link_down(&qedf->ctlr);
3584 else
3585 fc_fabric_logoff(qedf->lport);
3586
3587 if (qedf_wait_for_upload(qedf) == false)
3588 QEDF_ERR(&qedf->dbg_ctx, "Could not upload all sessions.\n");
3589
3590 #ifdef CONFIG_DEBUG_FS
3591 qedf_dbg_host_exit(&(qedf->dbg_ctx));
3592 #endif
3593
3594 /* Stop any link update handling */
3595 cancel_delayed_work_sync(&qedf->link_update);
3596 destroy_workqueue(qedf->link_update_wq);
3597 qedf->link_update_wq = NULL;
3598
3599 if (qedf->timer_work_queue)
3600 destroy_workqueue(qedf->timer_work_queue);
3601
3602 /* Stop Light L2 */
3603 clear_bit(QEDF_LL2_STARTED, &qedf->flags);
3604 qed_ops->ll2->stop(qedf->cdev);
3605 if (qedf->ll2_recv_wq)
3606 destroy_workqueue(qedf->ll2_recv_wq);
3607
3608 /* Stop fastpath */
3609 qedf_sync_free_irqs(qedf);
3610 qedf_destroy_sb(qedf);
3611
3612 /*
3613 * During recovery don't destroy OS constructs that represent the
3614 * physical port.
3615 */
3616 if (mode != QEDF_MODE_RECOVERY) {
3617 qedf_free_grc_dump_buf(&qedf->grcdump);
3618 qedf_remove_sysfs_ctx_attr(qedf);
3619
3620 /* Remove all SCSI/libfc/libfcoe structures */
3621 fcoe_ctlr_destroy(&qedf->ctlr);
3622 fc_lport_destroy(qedf->lport);
3623 fc_remove_host(qedf->lport->host);
3624 scsi_remove_host(qedf->lport->host);
3625 }
3626
3627 qedf_cmd_mgr_free(qedf->cmd_mgr);
3628
3629 if (mode != QEDF_MODE_RECOVERY) {
3630 fc_exch_mgr_free(qedf->lport);
3631 fc_lport_free_stats(qedf->lport);
3632
3633 /* Wait for all vports to be reaped */
3634 qedf_wait_for_vport_destroy(qedf);
3635 }
3636
3637 /*
3638 * Now that all connections have been uploaded we can stop the
3639 * rest of the qed operations
3640 */
3641 qed_ops->stop(qedf->cdev);
3642
3643 if (mode != QEDF_MODE_RECOVERY) {
3644 if (qedf->dpc_wq) {
3645 /* Stop general DPC handling */
3646 destroy_workqueue(qedf->dpc_wq);
3647 qedf->dpc_wq = NULL;
3648 }
3649 }
3650
3651 /* Final shutdown for the board */
3652 qedf_free_fcoe_pf_param(qedf);
3653 if (mode != QEDF_MODE_RECOVERY) {
3654 qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3655 pci_set_drvdata(pdev, NULL);
3656 }
3657
3658 rc = qed_ops->common->update_drv_state(qedf->cdev, false);
3659 if (rc)
3660 QEDF_ERR(&(qedf->dbg_ctx),
3661 "Failed to send drv state to MFW.\n");
3662
3663 qed_ops->common->slowpath_stop(qedf->cdev);
3664 qed_ops->common->remove(qedf->cdev);
3665
3666 mempool_destroy(qedf->io_mempool);
3667
3668 /* Only reap the Scsi_host on a real removal */
3669 if (mode != QEDF_MODE_RECOVERY)
3670 scsi_host_put(qedf->lport->host);
3671 }
3672
3673 static void qedf_remove(struct pci_dev *pdev)
3674 {
3675 /* Check to make sure this function wasn't already disabled */
3676 if (!atomic_read(&pdev->enable_cnt))
3677 return;
3678
3679 __qedf_remove(pdev, QEDF_MODE_NORMAL);
3680 }
3681
3682 void qedf_wq_grcdump(struct work_struct *work)
3683 {
3684 struct qedf_ctx *qedf =
3685 container_of(work, struct qedf_ctx, grcdump_work.work);
3686
3687 QEDF_ERR(&(qedf->dbg_ctx), "Collecting GRC dump.\n");
3688 qedf_capture_grc_dump(qedf);
3689 }
3690
3691 /*
3692 * Protocol TLV handler
3693 */
3694 void qedf_get_protocol_tlv_data(void *dev, void *data)
3695 {
3696 struct qedf_ctx *qedf = dev;
3697 struct qed_mfw_tlv_fcoe *fcoe = data;
3698 struct fc_lport *lport = qedf->lport;
3699 struct Scsi_Host *host = lport->host;
3700 struct fc_host_attrs *fc_host = shost_to_fc_host(host);
3701 struct fc_host_statistics *hst;
3702
3703 /* Force a refresh of the fc_host stats including offload stats */
3704 hst = qedf_fc_get_host_stats(host);
3705
3706 fcoe->qos_pri_set = true;
3707 fcoe->qos_pri = 3; /* Hard coded to 3 in driver */
3708
3709 fcoe->ra_tov_set = true;
3710 fcoe->ra_tov = lport->r_a_tov;
3711
3712 fcoe->ed_tov_set = true;
3713 fcoe->ed_tov = lport->e_d_tov;
3714
3715 fcoe->npiv_state_set = true;
3716 fcoe->npiv_state = 1; /* NPIV always enabled */
3717
3718 fcoe->num_npiv_ids_set = true;
3719 fcoe->num_npiv_ids = fc_host->npiv_vports_inuse;
3720
3721 /* Certain attributes we only want to set if we've selected an FCF */
3722 if (qedf->ctlr.sel_fcf) {
3723 fcoe->switch_name_set = true;
3724 u64_to_wwn(qedf->ctlr.sel_fcf->switch_name, fcoe->switch_name);
3725 }
3726
3727 fcoe->port_state_set = true;
3728 /* For qedf we're either link down or fabric attach */
3729 if (lport->link_up)
3730 fcoe->port_state = QED_MFW_TLV_PORT_STATE_FABRIC;
3731 else
3732 fcoe->port_state = QED_MFW_TLV_PORT_STATE_OFFLINE;
3733
3734 fcoe->link_failures_set = true;
3735 fcoe->link_failures = (u16)hst->link_failure_count;
3736
3737 fcoe->fcoe_txq_depth_set = true;
3738 fcoe->fcoe_rxq_depth_set = true;
3739 fcoe->fcoe_rxq_depth = FCOE_PARAMS_NUM_TASKS;
3740 fcoe->fcoe_txq_depth = FCOE_PARAMS_NUM_TASKS;
3741
3742 fcoe->fcoe_rx_frames_set = true;
3743 fcoe->fcoe_rx_frames = hst->rx_frames;
3744
3745 fcoe->fcoe_tx_frames_set = true;
3746 fcoe->fcoe_tx_frames = hst->tx_frames;
3747
3748 fcoe->fcoe_rx_bytes_set = true;
3749 fcoe->fcoe_rx_bytes = hst->fcp_input_megabytes * 1000000;
3750
3751 fcoe->fcoe_tx_bytes_set = true;
3752 fcoe->fcoe_tx_bytes = hst->fcp_output_megabytes * 1000000;
3753
3754 fcoe->crc_count_set = true;
3755 fcoe->crc_count = hst->invalid_crc_count;
3756
3757 fcoe->tx_abts_set = true;
3758 fcoe->tx_abts = hst->fcp_packet_aborts;
3759
3760 fcoe->tx_lun_rst_set = true;
3761 fcoe->tx_lun_rst = qedf->lun_resets;
3762
3763 fcoe->abort_task_sets_set = true;
3764 fcoe->abort_task_sets = qedf->packet_aborts;
3765
3766 fcoe->scsi_busy_set = true;
3767 fcoe->scsi_busy = qedf->busy;
3768
3769 fcoe->scsi_tsk_full_set = true;
3770 fcoe->scsi_tsk_full = qedf->task_set_fulls;
3771 }
3772
3773 static void qedf_shutdown(struct pci_dev *pdev)
3774 {
3775 __qedf_remove(pdev, QEDF_MODE_NORMAL);
3776 }
3777
3778 /* Generic TLV data callback */
3779 void qedf_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
3780 {
3781 struct qedf_ctx *qedf;
3782
3783 if (!dev) {
3784 QEDF_INFO(NULL, QEDF_LOG_EVT,
3785 "dev is NULL so ignoring get_generic_tlv_data request.\n");
3786 return;
3787 }
3788 qedf = (struct qedf_ctx *)dev;
3789
3790 memset(data, 0, sizeof(struct qed_generic_tlvs));
3791 ether_addr_copy(data->mac[0], qedf->mac);
3792 }
3793
3794 /*
3795 * Module Init/Remove
3796 */
3797
3798 static int __init qedf_init(void)
3799 {
3800 int ret;
3801
3802 /* If debug=1 passed, set the default log mask */
3803 if (qedf_debug == QEDF_LOG_DEFAULT)
3804 qedf_debug = QEDF_DEFAULT_LOG_MASK;
3805
3806 /*
3807 * Check that default prio for FIP/FCoE traffic is between 0..7 if a
3808 * value has been set
3809 */
3810 if (qedf_default_prio > -1)
3811 if (qedf_default_prio > 7) {
3812 qedf_default_prio = QEDF_DEFAULT_PRIO;
3813 QEDF_ERR(NULL, "FCoE/FIP priority out of range, resetting to %d.\n",
3814 QEDF_DEFAULT_PRIO);
3815 }
3816
3817 /* Print driver banner */
3818 QEDF_INFO(NULL, QEDF_LOG_INFO, "%s v%s.\n", QEDF_DESCR,
3819 QEDF_VERSION);
3820
3821 /* Create kmem_cache for qedf_io_work structs */
3822 qedf_io_work_cache = kmem_cache_create("qedf_io_work_cache",
3823 sizeof(struct qedf_io_work), 0, SLAB_HWCACHE_ALIGN, NULL);
3824 if (qedf_io_work_cache == NULL) {
3825 QEDF_ERR(NULL, "qedf_io_work_cache is NULL.\n");
3826 goto err1;
3827 }
3828 QEDF_INFO(NULL, QEDF_LOG_DISC, "qedf_io_work_cache=%p.\n",
3829 qedf_io_work_cache);
3830
3831 qed_ops = qed_get_fcoe_ops();
3832 if (!qed_ops) {
3833 QEDF_ERR(NULL, "Failed to get qed fcoe operations\n");
3834 goto err1;
3835 }
3836
3837 #ifdef CONFIG_DEBUG_FS
3838 qedf_dbg_init("qedf");
3839 #endif
3840
3841 qedf_fc_transport_template =
3842 fc_attach_transport(&qedf_fc_transport_fn);
3843 if (!qedf_fc_transport_template) {
3844 QEDF_ERR(NULL, "Could not register with FC transport\n");
3845 goto err2;
3846 }
3847
3848 qedf_fc_vport_transport_template =
3849 fc_attach_transport(&qedf_fc_vport_transport_fn);
3850 if (!qedf_fc_vport_transport_template) {
3851 QEDF_ERR(NULL, "Could not register vport template with FC "
3852 "transport\n");
3853 goto err3;
3854 }
3855
3856 qedf_io_wq = create_workqueue("qedf_io_wq");
3857 if (!qedf_io_wq) {
3858 QEDF_ERR(NULL, "Could not create qedf_io_wq.\n");
3859 goto err4;
3860 }
3861
3862 qedf_cb_ops.get_login_failures = qedf_get_login_failures;
3863
3864 ret = pci_register_driver(&qedf_pci_driver);
3865 if (ret) {
3866 QEDF_ERR(NULL, "Failed to register driver\n");
3867 goto err5;
3868 }
3869
3870 return 0;
3871
3872 err5:
3873 destroy_workqueue(qedf_io_wq);
3874 err4:
3875 fc_release_transport(qedf_fc_vport_transport_template);
3876 err3:
3877 fc_release_transport(qedf_fc_transport_template);
3878 err2:
3879 #ifdef CONFIG_DEBUG_FS
3880 qedf_dbg_exit();
3881 #endif
3882 qed_put_fcoe_ops();
3883 err1:
3884 return -EINVAL;
3885 }
3886
3887 static void __exit qedf_cleanup(void)
3888 {
3889 pci_unregister_driver(&qedf_pci_driver);
3890
3891 destroy_workqueue(qedf_io_wq);
3892
3893 fc_release_transport(qedf_fc_vport_transport_template);
3894 fc_release_transport(qedf_fc_transport_template);
3895 #ifdef CONFIG_DEBUG_FS
3896 qedf_dbg_exit();
3897 #endif
3898 qed_put_fcoe_ops();
3899
3900 kmem_cache_destroy(qedf_io_work_cache);
3901 }
3902
3903 MODULE_LICENSE("GPL");
3904 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx FCoE Module");
3905 MODULE_AUTHOR("QLogic Corporation");
3906 MODULE_VERSION(QEDF_VERSION);
3907 module_init(qedf_init);
3908 module_exit(qedf_cleanup);
Linux with added FPC-III support