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Linux 4.16.11
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_fcs.c
blobc7bf316d8e83447a33e139ba846ea254dbc42f91
1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18 #include <linux/errno.h>
19 #include <linux/pci.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/interrupt.h>
23 #include <linux/spinlock.h>
24 #include <linux/if_ether.h>
25 #include <linux/if_vlan.h>
26 #include <linux/workqueue.h>
27 #include <scsi/fc/fc_fip.h>
28 #include <scsi/fc/fc_els.h>
29 #include <scsi/fc/fc_fcoe.h>
30 #include <scsi/fc_frame.h>
31 #include <scsi/libfc.h>
32 #include "fnic_io.h"
33 #include "fnic.h"
34 #include "fnic_fip.h"
35 #include "cq_enet_desc.h"
36 #include "cq_exch_desc.h"
37
38 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
39 struct workqueue_struct *fnic_fip_queue;
40 struct workqueue_struct *fnic_event_queue;
41
42 static void fnic_set_eth_mode(struct fnic *);
43 static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
44 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
45 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
46 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
47 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
48
49 void fnic_handle_link(struct work_struct *work)
50 {
51 struct fnic *fnic = container_of(work, struct fnic, link_work);
52 unsigned long flags;
53 int old_link_status;
54 u32 old_link_down_cnt;
55
56 spin_lock_irqsave(&fnic->fnic_lock, flags);
57
58 if (fnic->stop_rx_link_events) {
59 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
60 return;
61 }
62
63 old_link_down_cnt = fnic->link_down_cnt;
64 old_link_status = fnic->link_status;
65 fnic->link_status = vnic_dev_link_status(fnic->vdev);
66 fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
67
68 switch (vnic_dev_port_speed(fnic->vdev)) {
69 case DCEM_PORTSPEED_10G:
70 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_10GBIT;
71 fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT;
72 break;
73 case DCEM_PORTSPEED_25G:
74 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_25GBIT;
75 fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT;
76 break;
77 case DCEM_PORTSPEED_40G:
78 case DCEM_PORTSPEED_4x10G:
79 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_40GBIT;
80 fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT;
81 break;
82 case DCEM_PORTSPEED_100G:
83 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_100GBIT;
84 fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT;
85 break;
86 default:
87 fc_host_speed(fnic->lport->host) = FC_PORTSPEED_UNKNOWN;
88 fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
89 break;
90 }
91
92 if (old_link_status == fnic->link_status) {
93 if (!fnic->link_status) {
94 /* DOWN -> DOWN */
95 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
96 fnic_fc_trace_set_data(fnic->lport->host->host_no,
97 FNIC_FC_LE, "Link Status: DOWN->DOWN",
98 strlen("Link Status: DOWN->DOWN"));
99 } else {
100 if (old_link_down_cnt != fnic->link_down_cnt) {
101 /* UP -> DOWN -> UP */
102 fnic->lport->host_stats.link_failure_count++;
103 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
104 fnic_fc_trace_set_data(
105 fnic->lport->host->host_no,
106 FNIC_FC_LE,
107 "Link Status:UP_DOWN_UP",
108 strlen("Link_Status:UP_DOWN_UP")
109 );
110 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
111 "link down\n");
112 fcoe_ctlr_link_down(&fnic->ctlr);
113 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
114 /* start FCoE VLAN discovery */
115 fnic_fc_trace_set_data(
116 fnic->lport->host->host_no,
117 FNIC_FC_LE,
118 "Link Status: UP_DOWN_UP_VLAN",
119 strlen(
120 "Link Status: UP_DOWN_UP_VLAN")
121 );
122 fnic_fcoe_send_vlan_req(fnic);
123 return;
124 }
125 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
126 "link up\n");
127 fcoe_ctlr_link_up(&fnic->ctlr);
128 } else {
129 /* UP -> UP */
130 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
131 fnic_fc_trace_set_data(
132 fnic->lport->host->host_no, FNIC_FC_LE,
133 "Link Status: UP_UP",
134 strlen("Link Status: UP_UP"));
135 }
136 }
137 } else if (fnic->link_status) {
138 /* DOWN -> UP */
139 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
140 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
141 /* start FCoE VLAN discovery */
142 fnic_fc_trace_set_data(
143 fnic->lport->host->host_no,
144 FNIC_FC_LE, "Link Status: DOWN_UP_VLAN",
145 strlen("Link Status: DOWN_UP_VLAN"));
146 fnic_fcoe_send_vlan_req(fnic);
147 return;
148 }
149 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
150 fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE,
151 "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP"));
152 fcoe_ctlr_link_up(&fnic->ctlr);
153 } else {
154 /* UP -> DOWN */
155 fnic->lport->host_stats.link_failure_count++;
156 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
157 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
158 fnic_fc_trace_set_data(
159 fnic->lport->host->host_no, FNIC_FC_LE,
160 "Link Status: UP_DOWN",
161 strlen("Link Status: UP_DOWN"));
162 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
163 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
164 "deleting fip-timer during link-down\n");
165 del_timer_sync(&fnic->fip_timer);
166 }
167 fcoe_ctlr_link_down(&fnic->ctlr);
168 }
169
170 }
171
172 /*
173 * This function passes incoming fabric frames to libFC
174 */
175 void fnic_handle_frame(struct work_struct *work)
176 {
177 struct fnic *fnic = container_of(work, struct fnic, frame_work);
178 struct fc_lport *lp = fnic->lport;
179 unsigned long flags;
180 struct sk_buff *skb;
181 struct fc_frame *fp;
182
183 while ((skb = skb_dequeue(&fnic->frame_queue))) {
184
185 spin_lock_irqsave(&fnic->fnic_lock, flags);
186 if (fnic->stop_rx_link_events) {
187 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
188 dev_kfree_skb(skb);
189 return;
190 }
191 fp = (struct fc_frame *)skb;
192
193 /*
194 * If we're in a transitional state, just re-queue and return.
195 * The queue will be serviced when we get to a stable state.
196 */
197 if (fnic->state != FNIC_IN_FC_MODE &&
198 fnic->state != FNIC_IN_ETH_MODE) {
199 skb_queue_head(&fnic->frame_queue, skb);
200 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
201 return;
202 }
203 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
204
205 fc_exch_recv(lp, fp);
206 }
207 }
208
209 void fnic_fcoe_evlist_free(struct fnic *fnic)
210 {
211 struct fnic_event *fevt = NULL;
212 struct fnic_event *next = NULL;
213 unsigned long flags;
214
215 spin_lock_irqsave(&fnic->fnic_lock, flags);
216 if (list_empty(&fnic->evlist)) {
217 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
218 return;
219 }
220
221 list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
222 list_del(&fevt->list);
223 kfree(fevt);
224 }
225 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
226 }
227
228 void fnic_handle_event(struct work_struct *work)
229 {
230 struct fnic *fnic = container_of(work, struct fnic, event_work);
231 struct fnic_event *fevt = NULL;
232 struct fnic_event *next = NULL;
233 unsigned long flags;
234
235 spin_lock_irqsave(&fnic->fnic_lock, flags);
236 if (list_empty(&fnic->evlist)) {
237 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
238 return;
239 }
240
241 list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
242 if (fnic->stop_rx_link_events) {
243 list_del(&fevt->list);
244 kfree(fevt);
245 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
246 return;
247 }
248 /*
249 * If we're in a transitional state, just re-queue and return.
250 * The queue will be serviced when we get to a stable state.
251 */
252 if (fnic->state != FNIC_IN_FC_MODE &&
253 fnic->state != FNIC_IN_ETH_MODE) {
254 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
255 return;
256 }
257
258 list_del(&fevt->list);
259 switch (fevt->event) {
260 case FNIC_EVT_START_VLAN_DISC:
261 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
262 fnic_fcoe_send_vlan_req(fnic);
263 spin_lock_irqsave(&fnic->fnic_lock, flags);
264 break;
265 case FNIC_EVT_START_FCF_DISC:
266 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
267 "Start FCF Discovery\n");
268 fnic_fcoe_start_fcf_disc(fnic);
269 break;
270 default:
271 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
272 "Unknown event 0x%x\n", fevt->event);
273 break;
274 }
275 kfree(fevt);
276 }
277 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
278 }
279
280 /**
281 * Check if the Received FIP FLOGI frame is rejected
282 * @fip: The FCoE controller that received the frame
283 * @skb: The received FIP frame
284 *
285 * Returns non-zero if the frame is rejected with unsupported cmd with
286 * insufficient resource els explanation.
287 */
288 static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
289 struct sk_buff *skb)
290 {
291 struct fc_lport *lport = fip->lp;
292 struct fip_header *fiph;
293 struct fc_frame_header *fh = NULL;
294 struct fip_desc *desc;
295 struct fip_encaps *els;
296 enum fip_desc_type els_dtype = 0;
297 u16 op;
298 u8 els_op;
299 u8 sub;
300
301 size_t els_len = 0;
302 size_t rlen;
303 size_t dlen = 0;
304
305 if (skb_linearize(skb))
306 return 0;
307
308 if (skb->len < sizeof(*fiph))
309 return 0;
310
311 fiph = (struct fip_header *)skb->data;
312 op = ntohs(fiph->fip_op);
313 sub = fiph->fip_subcode;
314
315 if (op != FIP_OP_LS)
316 return 0;
317
318 if (sub != FIP_SC_REP)
319 return 0;
320
321 rlen = ntohs(fiph->fip_dl_len) * 4;
322 if (rlen + sizeof(*fiph) > skb->len)
323 return 0;
324
325 desc = (struct fip_desc *)(fiph + 1);
326 dlen = desc->fip_dlen * FIP_BPW;
327
328 if (desc->fip_dtype == FIP_DT_FLOGI) {
329
330 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
331 return 0;
332
333 els_len = dlen - sizeof(*els);
334 els = (struct fip_encaps *)desc;
335 fh = (struct fc_frame_header *)(els + 1);
336 els_dtype = desc->fip_dtype;
337
338 if (!fh)
339 return 0;
340
341 /*
342 * ELS command code, reason and explanation should be = Reject,
343 * unsupported command and insufficient resource
344 */
345 els_op = *(u8 *)(fh + 1);
346 if (els_op == ELS_LS_RJT) {
347 shost_printk(KERN_INFO, lport->host,
348 "Flogi Request Rejected by Switch\n");
349 return 1;
350 }
351 shost_printk(KERN_INFO, lport->host,
352 "Flogi Request Accepted by Switch\n");
353 }
354 return 0;
355 }
356
357 static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
358 {
359 struct fcoe_ctlr *fip = &fnic->ctlr;
360 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
361 struct sk_buff *skb;
362 char *eth_fr;
363 int fr_len;
364 struct fip_vlan *vlan;
365 u64 vlan_tov;
366
367 fnic_fcoe_reset_vlans(fnic);
368 fnic->set_vlan(fnic, 0);
369
370 if (printk_ratelimit())
371 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
372 "Sending VLAN request...\n");
373
374 skb = dev_alloc_skb(sizeof(struct fip_vlan));
375 if (!skb)
376 return;
377
378 fr_len = sizeof(*vlan);
379 eth_fr = (char *)skb->data;
380 vlan = (struct fip_vlan *)eth_fr;
381
382 memset(vlan, 0, sizeof(*vlan));
383 memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
384 memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
385 vlan->eth.h_proto = htons(ETH_P_FIP);
386
387 vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
388 vlan->fip.fip_op = htons(FIP_OP_VLAN);
389 vlan->fip.fip_subcode = FIP_SC_VL_REQ;
390 vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
391
392 vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
393 vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
394 memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
395
396 vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
397 vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
398 put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
399 atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
400
401 skb_put(skb, sizeof(*vlan));
402 skb->protocol = htons(ETH_P_FIP);
403 skb_reset_mac_header(skb);
404 skb_reset_network_header(skb);
405 fip->send(fip, skb);
406
407 /* set a timer so that we can retry if there no response */
408 vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
409 mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
410 }
411
412 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
413 {
414 struct fcoe_ctlr *fip = &fnic->ctlr;
415 struct fip_header *fiph;
416 struct fip_desc *desc;
417 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
418 u16 vid;
419 size_t rlen;
420 size_t dlen;
421 struct fcoe_vlan *vlan;
422 u64 sol_time;
423 unsigned long flags;
424
425 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
426 "Received VLAN response...\n");
427
428 fiph = (struct fip_header *) skb->data;
429
430 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
431 "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
432 ntohs(fiph->fip_op), fiph->fip_subcode);
433
434 rlen = ntohs(fiph->fip_dl_len) * 4;
435 fnic_fcoe_reset_vlans(fnic);
436 spin_lock_irqsave(&fnic->vlans_lock, flags);
437 desc = (struct fip_desc *)(fiph + 1);
438 while (rlen > 0) {
439 dlen = desc->fip_dlen * FIP_BPW;
440 switch (desc->fip_dtype) {
441 case FIP_DT_VLAN:
442 vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
443 shost_printk(KERN_INFO, fnic->lport->host,
444 "process_vlan_resp: FIP VLAN %d\n", vid);
445 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
446 if (!vlan) {
447 /* retry from timer */
448 spin_unlock_irqrestore(&fnic->vlans_lock,
449 flags);
450 goto out;
451 }
452 vlan->vid = vid & 0x0fff;
453 vlan->state = FIP_VLAN_AVAIL;
454 list_add_tail(&vlan->list, &fnic->vlans);
455 break;
456 }
457 desc = (struct fip_desc *)((char *)desc + dlen);
458 rlen -= dlen;
459 }
460
461 /* any VLAN descriptors present ? */
462 if (list_empty(&fnic->vlans)) {
463 /* retry from timer */
464 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
465 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
466 "No VLAN descriptors in FIP VLAN response\n");
467 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
468 goto out;
469 }
470
471 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
472 fnic->set_vlan(fnic, vlan->vid);
473 vlan->state = FIP_VLAN_SENT; /* sent now */
474 vlan->sol_count++;
475 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
476
477 /* start the solicitation */
478 fcoe_ctlr_link_up(fip);
479
480 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
481 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
482 out:
483 return;
484 }
485
486 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
487 {
488 unsigned long flags;
489 struct fcoe_vlan *vlan;
490 u64 sol_time;
491
492 spin_lock_irqsave(&fnic->vlans_lock, flags);
493 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
494 fnic->set_vlan(fnic, vlan->vid);
495 vlan->state = FIP_VLAN_SENT; /* sent now */
496 vlan->sol_count = 1;
497 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
498
499 /* start the solicitation */
500 fcoe_ctlr_link_up(&fnic->ctlr);
501
502 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
503 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
504 }
505
506 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
507 {
508 unsigned long flags;
509 struct fcoe_vlan *fvlan;
510
511 spin_lock_irqsave(&fnic->vlans_lock, flags);
512 if (list_empty(&fnic->vlans)) {
513 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
514 return -EINVAL;
515 }
516
517 fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
518 if (fvlan->state == FIP_VLAN_USED) {
519 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
520 return 0;
521 }
522
523 if (fvlan->state == FIP_VLAN_SENT) {
524 fvlan->state = FIP_VLAN_USED;
525 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
526 return 0;
527 }
528 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
529 return -EINVAL;
530 }
531
532 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
533 {
534 struct fnic_event *fevt;
535 unsigned long flags;
536
537 fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
538 if (!fevt)
539 return;
540
541 fevt->fnic = fnic;
542 fevt->event = ev;
543
544 spin_lock_irqsave(&fnic->fnic_lock, flags);
545 list_add_tail(&fevt->list, &fnic->evlist);
546 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
547
548 schedule_work(&fnic->event_work);
549 }
550
551 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
552 {
553 struct fip_header *fiph;
554 int ret = 1;
555 u16 op;
556 u8 sub;
557
558 if (!skb || !(skb->data))
559 return -1;
560
561 if (skb_linearize(skb))
562 goto drop;
563
564 fiph = (struct fip_header *)skb->data;
565 op = ntohs(fiph->fip_op);
566 sub = fiph->fip_subcode;
567
568 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
569 goto drop;
570
571 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
572 goto drop;
573
574 if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
575 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
576 goto drop;
577 /* pass it on to fcoe */
578 ret = 1;
579 } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
580 /* set the vlan as used */
581 fnic_fcoe_process_vlan_resp(fnic, skb);
582 ret = 0;
583 } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
584 /* received CVL request, restart vlan disc */
585 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
586 /* pass it on to fcoe */
587 ret = 1;
588 }
589 drop:
590 return ret;
591 }
592
593 void fnic_handle_fip_frame(struct work_struct *work)
594 {
595 struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
596 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
597 unsigned long flags;
598 struct sk_buff *skb;
599 struct ethhdr *eh;
600
601 while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
602 spin_lock_irqsave(&fnic->fnic_lock, flags);
603 if (fnic->stop_rx_link_events) {
604 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
605 dev_kfree_skb(skb);
606 return;
607 }
608 /*
609 * If we're in a transitional state, just re-queue and return.
610 * The queue will be serviced when we get to a stable state.
611 */
612 if (fnic->state != FNIC_IN_FC_MODE &&
613 fnic->state != FNIC_IN_ETH_MODE) {
614 skb_queue_head(&fnic->fip_frame_queue, skb);
615 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
616 return;
617 }
618 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
619 eh = (struct ethhdr *)skb->data;
620 if (eh->h_proto == htons(ETH_P_FIP)) {
621 skb_pull(skb, sizeof(*eh));
622 if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
623 dev_kfree_skb(skb);
624 continue;
625 }
626 /*
627 * If there's FLOGI rejects - clear all
628 * fcf's & restart from scratch
629 */
630 if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
631 atomic64_inc(
632 &fnic_stats->vlan_stats.flogi_rejects);
633 shost_printk(KERN_INFO, fnic->lport->host,
634 "Trigger a Link down - VLAN Disc\n");
635 fcoe_ctlr_link_down(&fnic->ctlr);
636 /* start FCoE VLAN discovery */
637 fnic_fcoe_send_vlan_req(fnic);
638 dev_kfree_skb(skb);
639 continue;
640 }
641 fcoe_ctlr_recv(&fnic->ctlr, skb);
642 continue;
643 }
644 }
645 }
646
647 /**
648 * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
649 * @fnic: fnic instance.
650 * @skb: Ethernet Frame.
651 */
652 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
653 {
654 struct fc_frame *fp;
655 struct ethhdr *eh;
656 struct fcoe_hdr *fcoe_hdr;
657 struct fcoe_crc_eof *ft;
658
659 /*
660 * Undo VLAN encapsulation if present.
661 */
662 eh = (struct ethhdr *)skb->data;
663 if (eh->h_proto == htons(ETH_P_8021Q)) {
664 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
665 eh = skb_pull(skb, VLAN_HLEN);
666 skb_reset_mac_header(skb);
667 }
668 if (eh->h_proto == htons(ETH_P_FIP)) {
669 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
670 printk(KERN_ERR "Dropped FIP frame, as firmware "
671 "uses non-FIP mode, Enable FIP "
672 "using UCSM\n");
673 goto drop;
674 }
675 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
676 FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
677 printk(KERN_ERR "fnic ctlr frame trace error!!!");
678 }
679 skb_queue_tail(&fnic->fip_frame_queue, skb);
680 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
681 return 1; /* let caller know packet was used */
682 }
683 if (eh->h_proto != htons(ETH_P_FCOE))
684 goto drop;
685 skb_set_network_header(skb, sizeof(*eh));
686 skb_pull(skb, sizeof(*eh));
687
688 fcoe_hdr = (struct fcoe_hdr *)skb->data;
689 if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
690 goto drop;
691
692 fp = (struct fc_frame *)skb;
693 fc_frame_init(fp);
694 fr_sof(fp) = fcoe_hdr->fcoe_sof;
695 skb_pull(skb, sizeof(struct fcoe_hdr));
696 skb_reset_transport_header(skb);
697
698 ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
699 fr_eof(fp) = ft->fcoe_eof;
700 skb_trim(skb, skb->len - sizeof(*ft));
701 return 0;
702 drop:
703 dev_kfree_skb_irq(skb);
704 return -1;
705 }
706
707 /**
708 * fnic_update_mac_locked() - set data MAC address and filters.
709 * @fnic: fnic instance.
710 * @new: newly-assigned FCoE MAC address.
711 *
712 * Called with the fnic lock held.
713 */
714 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
715 {
716 u8 *ctl = fnic->ctlr.ctl_src_addr;
717 u8 *data = fnic->data_src_addr;
718
719 if (is_zero_ether_addr(new))
720 new = ctl;
721 if (ether_addr_equal(data, new))
722 return;
723 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
724 if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
725 vnic_dev_del_addr(fnic->vdev, data);
726 memcpy(data, new, ETH_ALEN);
727 if (!ether_addr_equal(new, ctl))
728 vnic_dev_add_addr(fnic->vdev, new);
729 }
730
731 /**
732 * fnic_update_mac() - set data MAC address and filters.
733 * @lport: local port.
734 * @new: newly-assigned FCoE MAC address.
735 */
736 void fnic_update_mac(struct fc_lport *lport, u8 *new)
737 {
738 struct fnic *fnic = lport_priv(lport);
739
740 spin_lock_irq(&fnic->fnic_lock);
741 fnic_update_mac_locked(fnic, new);
742 spin_unlock_irq(&fnic->fnic_lock);
743 }
744
745 /**
746 * fnic_set_port_id() - set the port_ID after successful FLOGI.
747 * @lport: local port.
748 * @port_id: assigned FC_ID.
749 * @fp: received frame containing the FLOGI accept or NULL.
750 *
751 * This is called from libfc when a new FC_ID has been assigned.
752 * This causes us to reset the firmware to FC_MODE and setup the new MAC
753 * address and FC_ID.
754 *
755 * It is also called with FC_ID 0 when we're logged off.
756 *
757 * If the FC_ID is due to point-to-point, fp may be NULL.
758 */
759 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
760 {
761 struct fnic *fnic = lport_priv(lport);
762 u8 *mac;
763 int ret;
764
765 FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
766 port_id, fp);
767
768 /*
769 * If we're clearing the FC_ID, change to use the ctl_src_addr.
770 * Set ethernet mode to send FLOGI.
771 */
772 if (!port_id) {
773 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
774 fnic_set_eth_mode(fnic);
775 return;
776 }
777
778 if (fp) {
779 mac = fr_cb(fp)->granted_mac;
780 if (is_zero_ether_addr(mac)) {
781 /* non-FIP - FLOGI already accepted - ignore return */
782 fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
783 }
784 fnic_update_mac(lport, mac);
785 }
786
787 /* Change state to reflect transition to FC mode */
788 spin_lock_irq(&fnic->fnic_lock);
789 if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
790 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
791 else {
792 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
793 "Unexpected fnic state %s while"
794 " processing flogi resp\n",
795 fnic_state_to_str(fnic->state));
796 spin_unlock_irq(&fnic->fnic_lock);
797 return;
798 }
799 spin_unlock_irq(&fnic->fnic_lock);
800
801 /*
802 * Send FLOGI registration to firmware to set up FC mode.
803 * The new address will be set up when registration completes.
804 */
805 ret = fnic_flogi_reg_handler(fnic, port_id);
806
807 if (ret < 0) {
808 spin_lock_irq(&fnic->fnic_lock);
809 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
810 fnic->state = FNIC_IN_ETH_MODE;
811 spin_unlock_irq(&fnic->fnic_lock);
812 }
813 }
814
815 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
816 *cq_desc, struct vnic_rq_buf *buf,
817 int skipped __attribute__((unused)),
818 void *opaque)
819 {
820 struct fnic *fnic = vnic_dev_priv(rq->vdev);
821 struct sk_buff *skb;
822 struct fc_frame *fp;
823 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
824 unsigned int eth_hdrs_stripped;
825 u8 type, color, eop, sop, ingress_port, vlan_stripped;
826 u8 fcoe = 0, fcoe_sof, fcoe_eof;
827 u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
828 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
829 u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
830 u8 fcs_ok = 1, packet_error = 0;
831 u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
832 u32 rss_hash;
833 u16 exchange_id, tmpl;
834 u8 sof = 0;
835 u8 eof = 0;
836 u32 fcp_bytes_written = 0;
837 unsigned long flags;
838
839 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
840 PCI_DMA_FROMDEVICE);
841 skb = buf->os_buf;
842 fp = (struct fc_frame *)skb;
843 buf->os_buf = NULL;
844
845 cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
846 if (type == CQ_DESC_TYPE_RQ_FCP) {
847 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
848 &type, &color, &q_number, &completed_index,
849 &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
850 &tmpl, &fcp_bytes_written, &sof, &eof,
851 &ingress_port, &packet_error,
852 &fcoe_enc_error, &fcs_ok, &vlan_stripped,
853 &vlan);
854 eth_hdrs_stripped = 1;
855 skb_trim(skb, fcp_bytes_written);
856 fr_sof(fp) = sof;
857 fr_eof(fp) = eof;
858
859 } else if (type == CQ_DESC_TYPE_RQ_ENET) {
860 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
861 &type, &color, &q_number, &completed_index,
862 &ingress_port, &fcoe, &eop, &sop,
863 &rss_type, &csum_not_calc, &rss_hash,
864 &bytes_written, &packet_error,
865 &vlan_stripped, &vlan, &checksum,
866 &fcoe_sof, &fcoe_fc_crc_ok,
867 &fcoe_enc_error, &fcoe_eof,
868 &tcp_udp_csum_ok, &udp, &tcp,
869 &ipv4_csum_ok, &ipv6, &ipv4,
870 &ipv4_fragment, &fcs_ok);
871 eth_hdrs_stripped = 0;
872 skb_trim(skb, bytes_written);
873 if (!fcs_ok) {
874 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
875 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
876 "fcs error. dropping packet.\n");
877 goto drop;
878 }
879 if (fnic_import_rq_eth_pkt(fnic, skb))
880 return;
881
882 } else {
883 /* wrong CQ type*/
884 shost_printk(KERN_ERR, fnic->lport->host,
885 "fnic rq_cmpl wrong cq type x%x\n", type);
886 goto drop;
887 }
888
889 if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
890 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
891 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
892 "fnic rq_cmpl fcoe x%x fcsok x%x"
893 " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
894 " x%x\n",
895 fcoe, fcs_ok, packet_error,
896 fcoe_fc_crc_ok, fcoe_enc_error);
897 goto drop;
898 }
899
900 spin_lock_irqsave(&fnic->fnic_lock, flags);
901 if (fnic->stop_rx_link_events) {
902 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
903 goto drop;
904 }
905 fr_dev(fp) = fnic->lport;
906 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
907 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
908 (char *)skb->data, skb->len)) != 0) {
909 printk(KERN_ERR "fnic ctlr frame trace error!!!");
910 }
911
912 skb_queue_tail(&fnic->frame_queue, skb);
913 queue_work(fnic_event_queue, &fnic->frame_work);
914
915 return;
916 drop:
917 dev_kfree_skb_irq(skb);
918 }
919
920 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
921 struct cq_desc *cq_desc, u8 type,
922 u16 q_number, u16 completed_index,
923 void *opaque)
924 {
925 struct fnic *fnic = vnic_dev_priv(vdev);
926
927 vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
928 VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
929 NULL);
930 return 0;
931 }
932
933 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
934 {
935 unsigned int tot_rq_work_done = 0, cur_work_done;
936 unsigned int i;
937 int err;
938
939 for (i = 0; i < fnic->rq_count; i++) {
940 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
941 fnic_rq_cmpl_handler_cont,
942 NULL);
943 if (cur_work_done) {
944 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
945 if (err)
946 shost_printk(KERN_ERR, fnic->lport->host,
947 "fnic_alloc_rq_frame can't alloc"
948 " frame\n");
949 }
950 tot_rq_work_done += cur_work_done;
951 }
952
953 return tot_rq_work_done;
954 }
955
956 /*
957 * This function is called once at init time to allocate and fill RQ
958 * buffers. Subsequently, it is called in the interrupt context after RQ
959 * buffer processing to replenish the buffers in the RQ
960 */
961 int fnic_alloc_rq_frame(struct vnic_rq *rq)
962 {
963 struct fnic *fnic = vnic_dev_priv(rq->vdev);
964 struct sk_buff *skb;
965 u16 len;
966 dma_addr_t pa;
967 int r;
968
969 len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
970 skb = dev_alloc_skb(len);
971 if (!skb) {
972 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
973 "Unable to allocate RQ sk_buff\n");
974 return -ENOMEM;
975 }
976 skb_reset_mac_header(skb);
977 skb_reset_transport_header(skb);
978 skb_reset_network_header(skb);
979 skb_put(skb, len);
980 pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
981
982 if (pci_dma_mapping_error(fnic->pdev, pa)) {
983 r = -ENOMEM;
984 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
985 goto free_skb;
986 }
987
988 fnic_queue_rq_desc(rq, skb, pa, len);
989 return 0;
990
991 free_skb:
992 kfree_skb(skb);
993 return r;
994 }
995
996 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
997 {
998 struct fc_frame *fp = buf->os_buf;
999 struct fnic *fnic = vnic_dev_priv(rq->vdev);
1000
1001 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
1002 PCI_DMA_FROMDEVICE);
1003
1004 dev_kfree_skb(fp_skb(fp));
1005 buf->os_buf = NULL;
1006 }
1007
1008 /**
1009 * fnic_eth_send() - Send Ethernet frame.
1010 * @fip: fcoe_ctlr instance.
1011 * @skb: Ethernet Frame, FIP, without VLAN encapsulation.
1012 */
1013 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
1014 {
1015 struct fnic *fnic = fnic_from_ctlr(fip);
1016 struct vnic_wq *wq = &fnic->wq[0];
1017 dma_addr_t pa;
1018 struct ethhdr *eth_hdr;
1019 struct vlan_ethhdr *vlan_hdr;
1020 unsigned long flags;
1021 int r;
1022
1023 if (!fnic->vlan_hw_insert) {
1024 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
1025 vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr));
1026 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
1027 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1028 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
1029 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1030 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1031 FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
1032 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1033 }
1034 } else {
1035 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1036 FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
1037 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1038 }
1039 }
1040
1041 pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1042
1043 r = pci_dma_mapping_error(fnic->pdev, pa);
1044 if (r) {
1045 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
1046 goto free_skb;
1047 }
1048
1049 spin_lock_irqsave(&fnic->wq_lock[0], flags);
1050 if (!vnic_wq_desc_avail(wq))
1051 goto irq_restore;
1052
1053 fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
1054 0 /* hw inserts cos value */,
1055 fnic->vlan_id, 1);
1056 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1057 return;
1058
1059 irq_restore:
1060 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1061 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
1062 free_skb:
1063 kfree_skb(skb);
1064 }
1065
1066 /*
1067 * Send FC frame.
1068 */
1069 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
1070 {
1071 struct vnic_wq *wq = &fnic->wq[0];
1072 struct sk_buff *skb;
1073 dma_addr_t pa;
1074 struct ethhdr *eth_hdr;
1075 struct vlan_ethhdr *vlan_hdr;
1076 struct fcoe_hdr *fcoe_hdr;
1077 struct fc_frame_header *fh;
1078 u32 tot_len, eth_hdr_len;
1079 int ret = 0;
1080 unsigned long flags;
1081
1082 fh = fc_frame_header_get(fp);
1083 skb = fp_skb(fp);
1084
1085 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1086 fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
1087 return 0;
1088
1089 if (!fnic->vlan_hw_insert) {
1090 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
1091 vlan_hdr = skb_push(skb, eth_hdr_len);
1092 eth_hdr = (struct ethhdr *)vlan_hdr;
1093 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1094 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1095 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1096 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1097 } else {
1098 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1099 eth_hdr = skb_push(skb, eth_hdr_len);
1100 eth_hdr->h_proto = htons(ETH_P_FCOE);
1101 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1102 }
1103
1104 if (fnic->ctlr.map_dest)
1105 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1106 else
1107 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1108 memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1109
1110 tot_len = skb->len;
1111 BUG_ON(tot_len % 4);
1112
1113 memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1114 fcoe_hdr->fcoe_sof = fr_sof(fp);
1115 if (FC_FCOE_VER)
1116 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1117
1118 pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
1119
1120 if (pci_dma_mapping_error(fnic->pdev, pa)) {
1121 ret = -ENOMEM;
1122 printk(KERN_ERR "DMA map failed with error %d\n", ret);
1123 goto free_skb_on_err;
1124 }
1125
1126 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
1127 (char *)eth_hdr, tot_len)) != 0) {
1128 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1129 }
1130
1131 spin_lock_irqsave(&fnic->wq_lock[0], flags);
1132
1133 if (!vnic_wq_desc_avail(wq)) {
1134 pci_unmap_single(fnic->pdev, pa,
1135 tot_len, PCI_DMA_TODEVICE);
1136 ret = -1;
1137 goto irq_restore;
1138 }
1139
1140 fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1141 0 /* hw inserts cos value */,
1142 fnic->vlan_id, 1, 1, 1);
1143
1144 irq_restore:
1145 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1146
1147 free_skb_on_err:
1148 if (ret)
1149 dev_kfree_skb_any(fp_skb(fp));
1150
1151 return ret;
1152 }
1153
1154 /*
1155 * fnic_send
1156 * Routine to send a raw frame
1157 */
1158 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1159 {
1160 struct fnic *fnic = lport_priv(lp);
1161 unsigned long flags;
1162
1163 if (fnic->in_remove) {
1164 dev_kfree_skb(fp_skb(fp));
1165 return -1;
1166 }
1167
1168 /*
1169 * Queue frame if in a transitional state.
1170 * This occurs while registering the Port_ID / MAC address after FLOGI.
1171 */
1172 spin_lock_irqsave(&fnic->fnic_lock, flags);
1173 if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1174 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1175 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1176 return 0;
1177 }
1178 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1179
1180 return fnic_send_frame(fnic, fp);
1181 }
1182
1183 /**
1184 * fnic_flush_tx() - send queued frames.
1185 * @fnic: fnic device
1186 *
1187 * Send frames that were waiting to go out in FC or Ethernet mode.
1188 * Whenever changing modes we purge queued frames, so these frames should
1189 * be queued for the stable mode that we're in, either FC or Ethernet.
1190 *
1191 * Called without fnic_lock held.
1192 */
1193 void fnic_flush_tx(struct fnic *fnic)
1194 {
1195 struct sk_buff *skb;
1196 struct fc_frame *fp;
1197
1198 while ((skb = skb_dequeue(&fnic->tx_queue))) {
1199 fp = (struct fc_frame *)skb;
1200 fnic_send_frame(fnic, fp);
1201 }
1202 }
1203
1204 /**
1205 * fnic_set_eth_mode() - put fnic into ethernet mode.
1206 * @fnic: fnic device
1207 *
1208 * Called without fnic lock held.
1209 */
1210 static void fnic_set_eth_mode(struct fnic *fnic)
1211 {
1212 unsigned long flags;
1213 enum fnic_state old_state;
1214 int ret;
1215
1216 spin_lock_irqsave(&fnic->fnic_lock, flags);
1217 again:
1218 old_state = fnic->state;
1219 switch (old_state) {
1220 case FNIC_IN_FC_MODE:
1221 case FNIC_IN_ETH_TRANS_FC_MODE:
1222 default:
1223 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1224 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1225
1226 ret = fnic_fw_reset_handler(fnic);
1227
1228 spin_lock_irqsave(&fnic->fnic_lock, flags);
1229 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1230 goto again;
1231 if (ret)
1232 fnic->state = old_state;
1233 break;
1234
1235 case FNIC_IN_FC_TRANS_ETH_MODE:
1236 case FNIC_IN_ETH_MODE:
1237 break;
1238 }
1239 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1240 }
1241
1242 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1243 struct cq_desc *cq_desc,
1244 struct vnic_wq_buf *buf, void *opaque)
1245 {
1246 struct sk_buff *skb = buf->os_buf;
1247 struct fc_frame *fp = (struct fc_frame *)skb;
1248 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1249
1250 pci_unmap_single(fnic->pdev, buf->dma_addr,
1251 buf->len, PCI_DMA_TODEVICE);
1252 dev_kfree_skb_irq(fp_skb(fp));
1253 buf->os_buf = NULL;
1254 }
1255
1256 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1257 struct cq_desc *cq_desc, u8 type,
1258 u16 q_number, u16 completed_index,
1259 void *opaque)
1260 {
1261 struct fnic *fnic = vnic_dev_priv(vdev);
1262 unsigned long flags;
1263
1264 spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1265 vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1266 fnic_wq_complete_frame_send, NULL);
1267 spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1268
1269 return 0;
1270 }
1271
1272 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1273 {
1274 unsigned int wq_work_done = 0;
1275 unsigned int i;
1276
1277 for (i = 0; i < fnic->raw_wq_count; i++) {
1278 wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1279 work_to_do,
1280 fnic_wq_cmpl_handler_cont,
1281 NULL);
1282 }
1283
1284 return wq_work_done;
1285 }
1286
1287
1288 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1289 {
1290 struct fc_frame *fp = buf->os_buf;
1291 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1292
1293 pci_unmap_single(fnic->pdev, buf->dma_addr,
1294 buf->len, PCI_DMA_TODEVICE);
1295
1296 dev_kfree_skb(fp_skb(fp));
1297 buf->os_buf = NULL;
1298 }
1299
1300 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1301 {
1302 unsigned long flags;
1303 struct fcoe_vlan *vlan;
1304 struct fcoe_vlan *next;
1305
1306 /*
1307 * indicate a link down to fcoe so that all fcf's are free'd
1308 * might not be required since we did this before sending vlan
1309 * discovery request
1310 */
1311 spin_lock_irqsave(&fnic->vlans_lock, flags);
1312 if (!list_empty(&fnic->vlans)) {
1313 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1314 list_del(&vlan->list);
1315 kfree(vlan);
1316 }
1317 }
1318 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1319 }
1320
1321 void fnic_handle_fip_timer(struct fnic *fnic)
1322 {
1323 unsigned long flags;
1324 struct fcoe_vlan *vlan;
1325 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1326 u64 sol_time;
1327
1328 spin_lock_irqsave(&fnic->fnic_lock, flags);
1329 if (fnic->stop_rx_link_events) {
1330 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1331 return;
1332 }
1333 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1334
1335 if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
1336 return;
1337
1338 spin_lock_irqsave(&fnic->vlans_lock, flags);
1339 if (list_empty(&fnic->vlans)) {
1340 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1341 /* no vlans available, try again */
1342 if (printk_ratelimit())
1343 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1344 "Start VLAN Discovery\n");
1345 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1346 return;
1347 }
1348
1349 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1350 shost_printk(KERN_DEBUG, fnic->lport->host,
1351 "fip_timer: vlan %d state %d sol_count %d\n",
1352 vlan->vid, vlan->state, vlan->sol_count);
1353 switch (vlan->state) {
1354 case FIP_VLAN_USED:
1355 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1356 "FIP VLAN is selected for FC transaction\n");
1357 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1358 break;
1359 case FIP_VLAN_FAILED:
1360 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1361 /* if all vlans are in failed state, restart vlan disc */
1362 if (printk_ratelimit())
1363 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1364 "Start VLAN Discovery\n");
1365 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1366 break;
1367 case FIP_VLAN_SENT:
1368 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1369 /*
1370 * no response on this vlan, remove from the list.
1371 * Try the next vlan
1372 */
1373 shost_printk(KERN_INFO, fnic->lport->host,
1374 "Dequeue this VLAN ID %d from list\n",
1375 vlan->vid);
1376 list_del(&vlan->list);
1377 kfree(vlan);
1378 vlan = NULL;
1379 if (list_empty(&fnic->vlans)) {
1380 /* we exhausted all vlans, restart vlan disc */
1381 spin_unlock_irqrestore(&fnic->vlans_lock,
1382 flags);
1383 shost_printk(KERN_INFO, fnic->lport->host,
1384 "fip_timer: vlan list empty, "
1385 "trigger vlan disc\n");
1386 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1387 return;
1388 }
1389 /* check the next vlan */
1390 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1391 list);
1392 fnic->set_vlan(fnic, vlan->vid);
1393 vlan->state = FIP_VLAN_SENT; /* sent now */
1394 }
1395 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1396 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
1397 vlan->sol_count++;
1398 sol_time = jiffies + msecs_to_jiffies
1399 (FCOE_CTLR_START_DELAY);
1400 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1401 break;
1402 }
1403 }
Linux with added FPC-III support