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x86/speculation/mds: Fix documentation typo
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_fcs.c
blob999fc7547560003fe73a9f870d1ba986a70095b8
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 = kmalloc(sizeof(*vlan),
446 GFP_ATOMIC);
447 if (!vlan) {
448 /* retry from timer */
449 spin_unlock_irqrestore(&fnic->vlans_lock,
450 flags);
451 goto out;
452 }
453 memset(vlan, 0, sizeof(struct fcoe_vlan));
454 vlan->vid = vid & 0x0fff;
455 vlan->state = FIP_VLAN_AVAIL;
456 list_add_tail(&vlan->list, &fnic->vlans);
457 break;
458 }
459 desc = (struct fip_desc *)((char *)desc + dlen);
460 rlen -= dlen;
461 }
462
463 /* any VLAN descriptors present ? */
464 if (list_empty(&fnic->vlans)) {
465 /* retry from timer */
466 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
467 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
468 "No VLAN descriptors in FIP VLAN response\n");
469 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
470 goto out;
471 }
472
473 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
474 fnic->set_vlan(fnic, vlan->vid);
475 vlan->state = FIP_VLAN_SENT; /* sent now */
476 vlan->sol_count++;
477 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
478
479 /* start the solicitation */
480 fcoe_ctlr_link_up(fip);
481
482 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
483 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
484 out:
485 return;
486 }
487
488 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
489 {
490 unsigned long flags;
491 struct fcoe_vlan *vlan;
492 u64 sol_time;
493
494 spin_lock_irqsave(&fnic->vlans_lock, flags);
495 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
496 fnic->set_vlan(fnic, vlan->vid);
497 vlan->state = FIP_VLAN_SENT; /* sent now */
498 vlan->sol_count = 1;
499 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
500
501 /* start the solicitation */
502 fcoe_ctlr_link_up(&fnic->ctlr);
503
504 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
505 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
506 }
507
508 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
509 {
510 unsigned long flags;
511 struct fcoe_vlan *fvlan;
512
513 spin_lock_irqsave(&fnic->vlans_lock, flags);
514 if (list_empty(&fnic->vlans)) {
515 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
516 return -EINVAL;
517 }
518
519 fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
520 if (fvlan->state == FIP_VLAN_USED) {
521 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
522 return 0;
523 }
524
525 if (fvlan->state == FIP_VLAN_SENT) {
526 fvlan->state = FIP_VLAN_USED;
527 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
528 return 0;
529 }
530 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
531 return -EINVAL;
532 }
533
534 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
535 {
536 struct fnic_event *fevt;
537 unsigned long flags;
538
539 fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
540 if (!fevt)
541 return;
542
543 fevt->fnic = fnic;
544 fevt->event = ev;
545
546 spin_lock_irqsave(&fnic->fnic_lock, flags);
547 list_add_tail(&fevt->list, &fnic->evlist);
548 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
549
550 schedule_work(&fnic->event_work);
551 }
552
553 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
554 {
555 struct fip_header *fiph;
556 int ret = 1;
557 u16 op;
558 u8 sub;
559
560 if (!skb || !(skb->data))
561 return -1;
562
563 if (skb_linearize(skb))
564 goto drop;
565
566 fiph = (struct fip_header *)skb->data;
567 op = ntohs(fiph->fip_op);
568 sub = fiph->fip_subcode;
569
570 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
571 goto drop;
572
573 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
574 goto drop;
575
576 if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
577 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
578 goto drop;
579 /* pass it on to fcoe */
580 ret = 1;
581 } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
582 /* set the vlan as used */
583 fnic_fcoe_process_vlan_resp(fnic, skb);
584 ret = 0;
585 } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
586 /* received CVL request, restart vlan disc */
587 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
588 /* pass it on to fcoe */
589 ret = 1;
590 }
591 drop:
592 return ret;
593 }
594
595 void fnic_handle_fip_frame(struct work_struct *work)
596 {
597 struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
598 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
599 unsigned long flags;
600 struct sk_buff *skb;
601 struct ethhdr *eh;
602
603 while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
604 spin_lock_irqsave(&fnic->fnic_lock, flags);
605 if (fnic->stop_rx_link_events) {
606 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
607 dev_kfree_skb(skb);
608 return;
609 }
610 /*
611 * If we're in a transitional state, just re-queue and return.
612 * The queue will be serviced when we get to a stable state.
613 */
614 if (fnic->state != FNIC_IN_FC_MODE &&
615 fnic->state != FNIC_IN_ETH_MODE) {
616 skb_queue_head(&fnic->fip_frame_queue, skb);
617 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
618 return;
619 }
620 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
621 eh = (struct ethhdr *)skb->data;
622 if (eh->h_proto == htons(ETH_P_FIP)) {
623 skb_pull(skb, sizeof(*eh));
624 if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
625 dev_kfree_skb(skb);
626 continue;
627 }
628 /*
629 * If there's FLOGI rejects - clear all
630 * fcf's & restart from scratch
631 */
632 if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
633 atomic64_inc(
634 &fnic_stats->vlan_stats.flogi_rejects);
635 shost_printk(KERN_INFO, fnic->lport->host,
636 "Trigger a Link down - VLAN Disc\n");
637 fcoe_ctlr_link_down(&fnic->ctlr);
638 /* start FCoE VLAN discovery */
639 fnic_fcoe_send_vlan_req(fnic);
640 dev_kfree_skb(skb);
641 continue;
642 }
643 fcoe_ctlr_recv(&fnic->ctlr, skb);
644 continue;
645 }
646 }
647 }
648
649 /**
650 * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
651 * @fnic: fnic instance.
652 * @skb: Ethernet Frame.
653 */
654 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
655 {
656 struct fc_frame *fp;
657 struct ethhdr *eh;
658 struct fcoe_hdr *fcoe_hdr;
659 struct fcoe_crc_eof *ft;
660
661 /*
662 * Undo VLAN encapsulation if present.
663 */
664 eh = (struct ethhdr *)skb->data;
665 if (eh->h_proto == htons(ETH_P_8021Q)) {
666 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
667 eh = skb_pull(skb, VLAN_HLEN);
668 skb_reset_mac_header(skb);
669 }
670 if (eh->h_proto == htons(ETH_P_FIP)) {
671 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
672 printk(KERN_ERR "Dropped FIP frame, as firmware "
673 "uses non-FIP mode, Enable FIP "
674 "using UCSM\n");
675 goto drop;
676 }
677 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
678 FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
679 printk(KERN_ERR "fnic ctlr frame trace error!!!");
680 }
681 skb_queue_tail(&fnic->fip_frame_queue, skb);
682 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
683 return 1; /* let caller know packet was used */
684 }
685 if (eh->h_proto != htons(ETH_P_FCOE))
686 goto drop;
687 skb_set_network_header(skb, sizeof(*eh));
688 skb_pull(skb, sizeof(*eh));
689
690 fcoe_hdr = (struct fcoe_hdr *)skb->data;
691 if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
692 goto drop;
693
694 fp = (struct fc_frame *)skb;
695 fc_frame_init(fp);
696 fr_sof(fp) = fcoe_hdr->fcoe_sof;
697 skb_pull(skb, sizeof(struct fcoe_hdr));
698 skb_reset_transport_header(skb);
699
700 ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
701 fr_eof(fp) = ft->fcoe_eof;
702 skb_trim(skb, skb->len - sizeof(*ft));
703 return 0;
704 drop:
705 dev_kfree_skb_irq(skb);
706 return -1;
707 }
708
709 /**
710 * fnic_update_mac_locked() - set data MAC address and filters.
711 * @fnic: fnic instance.
712 * @new: newly-assigned FCoE MAC address.
713 *
714 * Called with the fnic lock held.
715 */
716 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
717 {
718 u8 *ctl = fnic->ctlr.ctl_src_addr;
719 u8 *data = fnic->data_src_addr;
720
721 if (is_zero_ether_addr(new))
722 new = ctl;
723 if (ether_addr_equal(data, new))
724 return;
725 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
726 if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
727 vnic_dev_del_addr(fnic->vdev, data);
728 memcpy(data, new, ETH_ALEN);
729 if (!ether_addr_equal(new, ctl))
730 vnic_dev_add_addr(fnic->vdev, new);
731 }
732
733 /**
734 * fnic_update_mac() - set data MAC address and filters.
735 * @lport: local port.
736 * @new: newly-assigned FCoE MAC address.
737 */
738 void fnic_update_mac(struct fc_lport *lport, u8 *new)
739 {
740 struct fnic *fnic = lport_priv(lport);
741
742 spin_lock_irq(&fnic->fnic_lock);
743 fnic_update_mac_locked(fnic, new);
744 spin_unlock_irq(&fnic->fnic_lock);
745 }
746
747 /**
748 * fnic_set_port_id() - set the port_ID after successful FLOGI.
749 * @lport: local port.
750 * @port_id: assigned FC_ID.
751 * @fp: received frame containing the FLOGI accept or NULL.
752 *
753 * This is called from libfc when a new FC_ID has been assigned.
754 * This causes us to reset the firmware to FC_MODE and setup the new MAC
755 * address and FC_ID.
756 *
757 * It is also called with FC_ID 0 when we're logged off.
758 *
759 * If the FC_ID is due to point-to-point, fp may be NULL.
760 */
761 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
762 {
763 struct fnic *fnic = lport_priv(lport);
764 u8 *mac;
765 int ret;
766
767 FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
768 port_id, fp);
769
770 /*
771 * If we're clearing the FC_ID, change to use the ctl_src_addr.
772 * Set ethernet mode to send FLOGI.
773 */
774 if (!port_id) {
775 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
776 fnic_set_eth_mode(fnic);
777 return;
778 }
779
780 if (fp) {
781 mac = fr_cb(fp)->granted_mac;
782 if (is_zero_ether_addr(mac)) {
783 /* non-FIP - FLOGI already accepted - ignore return */
784 fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
785 }
786 fnic_update_mac(lport, mac);
787 }
788
789 /* Change state to reflect transition to FC mode */
790 spin_lock_irq(&fnic->fnic_lock);
791 if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
792 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
793 else {
794 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
795 "Unexpected fnic state %s while"
796 " processing flogi resp\n",
797 fnic_state_to_str(fnic->state));
798 spin_unlock_irq(&fnic->fnic_lock);
799 return;
800 }
801 spin_unlock_irq(&fnic->fnic_lock);
802
803 /*
804 * Send FLOGI registration to firmware to set up FC mode.
805 * The new address will be set up when registration completes.
806 */
807 ret = fnic_flogi_reg_handler(fnic, port_id);
808
809 if (ret < 0) {
810 spin_lock_irq(&fnic->fnic_lock);
811 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
812 fnic->state = FNIC_IN_ETH_MODE;
813 spin_unlock_irq(&fnic->fnic_lock);
814 }
815 }
816
817 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
818 *cq_desc, struct vnic_rq_buf *buf,
819 int skipped __attribute__((unused)),
820 void *opaque)
821 {
822 struct fnic *fnic = vnic_dev_priv(rq->vdev);
823 struct sk_buff *skb;
824 struct fc_frame *fp;
825 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
826 unsigned int eth_hdrs_stripped;
827 u8 type, color, eop, sop, ingress_port, vlan_stripped;
828 u8 fcoe = 0, fcoe_sof, fcoe_eof;
829 u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
830 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
831 u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
832 u8 fcs_ok = 1, packet_error = 0;
833 u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
834 u32 rss_hash;
835 u16 exchange_id, tmpl;
836 u8 sof = 0;
837 u8 eof = 0;
838 u32 fcp_bytes_written = 0;
839 unsigned long flags;
840
841 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
842 PCI_DMA_FROMDEVICE);
843 skb = buf->os_buf;
844 fp = (struct fc_frame *)skb;
845 buf->os_buf = NULL;
846
847 cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
848 if (type == CQ_DESC_TYPE_RQ_FCP) {
849 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
850 &type, &color, &q_number, &completed_index,
851 &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
852 &tmpl, &fcp_bytes_written, &sof, &eof,
853 &ingress_port, &packet_error,
854 &fcoe_enc_error, &fcs_ok, &vlan_stripped,
855 &vlan);
856 eth_hdrs_stripped = 1;
857 skb_trim(skb, fcp_bytes_written);
858 fr_sof(fp) = sof;
859 fr_eof(fp) = eof;
860
861 } else if (type == CQ_DESC_TYPE_RQ_ENET) {
862 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
863 &type, &color, &q_number, &completed_index,
864 &ingress_port, &fcoe, &eop, &sop,
865 &rss_type, &csum_not_calc, &rss_hash,
866 &bytes_written, &packet_error,
867 &vlan_stripped, &vlan, &checksum,
868 &fcoe_sof, &fcoe_fc_crc_ok,
869 &fcoe_enc_error, &fcoe_eof,
870 &tcp_udp_csum_ok, &udp, &tcp,
871 &ipv4_csum_ok, &ipv6, &ipv4,
872 &ipv4_fragment, &fcs_ok);
873 eth_hdrs_stripped = 0;
874 skb_trim(skb, bytes_written);
875 if (!fcs_ok) {
876 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
877 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
878 "fcs error. dropping packet.\n");
879 goto drop;
880 }
881 if (fnic_import_rq_eth_pkt(fnic, skb))
882 return;
883
884 } else {
885 /* wrong CQ type*/
886 shost_printk(KERN_ERR, fnic->lport->host,
887 "fnic rq_cmpl wrong cq type x%x\n", type);
888 goto drop;
889 }
890
891 if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
892 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
893 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
894 "fnic rq_cmpl fcoe x%x fcsok x%x"
895 " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
896 " x%x\n",
897 fcoe, fcs_ok, packet_error,
898 fcoe_fc_crc_ok, fcoe_enc_error);
899 goto drop;
900 }
901
902 spin_lock_irqsave(&fnic->fnic_lock, flags);
903 if (fnic->stop_rx_link_events) {
904 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
905 goto drop;
906 }
907 fr_dev(fp) = fnic->lport;
908 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
909 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
910 (char *)skb->data, skb->len)) != 0) {
911 printk(KERN_ERR "fnic ctlr frame trace error!!!");
912 }
913
914 skb_queue_tail(&fnic->frame_queue, skb);
915 queue_work(fnic_event_queue, &fnic->frame_work);
916
917 return;
918 drop:
919 dev_kfree_skb_irq(skb);
920 }
921
922 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
923 struct cq_desc *cq_desc, u8 type,
924 u16 q_number, u16 completed_index,
925 void *opaque)
926 {
927 struct fnic *fnic = vnic_dev_priv(vdev);
928
929 vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
930 VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
931 NULL);
932 return 0;
933 }
934
935 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
936 {
937 unsigned int tot_rq_work_done = 0, cur_work_done;
938 unsigned int i;
939 int err;
940
941 for (i = 0; i < fnic->rq_count; i++) {
942 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
943 fnic_rq_cmpl_handler_cont,
944 NULL);
945 if (cur_work_done) {
946 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
947 if (err)
948 shost_printk(KERN_ERR, fnic->lport->host,
949 "fnic_alloc_rq_frame can't alloc"
950 " frame\n");
951 }
952 tot_rq_work_done += cur_work_done;
953 }
954
955 return tot_rq_work_done;
956 }
957
958 /*
959 * This function is called once at init time to allocate and fill RQ
960 * buffers. Subsequently, it is called in the interrupt context after RQ
961 * buffer processing to replenish the buffers in the RQ
962 */
963 int fnic_alloc_rq_frame(struct vnic_rq *rq)
964 {
965 struct fnic *fnic = vnic_dev_priv(rq->vdev);
966 struct sk_buff *skb;
967 u16 len;
968 dma_addr_t pa;
969 int r;
970
971 len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
972 skb = dev_alloc_skb(len);
973 if (!skb) {
974 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
975 "Unable to allocate RQ sk_buff\n");
976 return -ENOMEM;
977 }
978 skb_reset_mac_header(skb);
979 skb_reset_transport_header(skb);
980 skb_reset_network_header(skb);
981 skb_put(skb, len);
982 pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
983
984 if (pci_dma_mapping_error(fnic->pdev, pa)) {
985 r = -ENOMEM;
986 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
987 goto free_skb;
988 }
989
990 fnic_queue_rq_desc(rq, skb, pa, len);
991 return 0;
992
993 free_skb:
994 kfree_skb(skb);
995 return r;
996 }
997
998 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
999 {
1000 struct fc_frame *fp = buf->os_buf;
1001 struct fnic *fnic = vnic_dev_priv(rq->vdev);
1002
1003 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
1004 PCI_DMA_FROMDEVICE);
1005
1006 dev_kfree_skb(fp_skb(fp));
1007 buf->os_buf = NULL;
1008 }
1009
1010 /**
1011 * fnic_eth_send() - Send Ethernet frame.
1012 * @fip: fcoe_ctlr instance.
1013 * @skb: Ethernet Frame, FIP, without VLAN encapsulation.
1014 */
1015 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
1016 {
1017 struct fnic *fnic = fnic_from_ctlr(fip);
1018 struct vnic_wq *wq = &fnic->wq[0];
1019 dma_addr_t pa;
1020 struct ethhdr *eth_hdr;
1021 struct vlan_ethhdr *vlan_hdr;
1022 unsigned long flags;
1023 int r;
1024
1025 if (!fnic->vlan_hw_insert) {
1026 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
1027 vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr));
1028 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
1029 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1030 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
1031 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1032 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1033 FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
1034 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1035 }
1036 } else {
1037 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
1038 FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
1039 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1040 }
1041 }
1042
1043 pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1044
1045 r = pci_dma_mapping_error(fnic->pdev, pa);
1046 if (r) {
1047 printk(KERN_ERR "PCI mapping failed with error %d\n", r);
1048 goto free_skb;
1049 }
1050
1051 spin_lock_irqsave(&fnic->wq_lock[0], flags);
1052 if (!vnic_wq_desc_avail(wq))
1053 goto irq_restore;
1054
1055 fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
1056 0 /* hw inserts cos value */,
1057 fnic->vlan_id, 1);
1058 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1059 return;
1060
1061 irq_restore:
1062 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1063 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
1064 free_skb:
1065 kfree_skb(skb);
1066 }
1067
1068 /*
1069 * Send FC frame.
1070 */
1071 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
1072 {
1073 struct vnic_wq *wq = &fnic->wq[0];
1074 struct sk_buff *skb;
1075 dma_addr_t pa;
1076 struct ethhdr *eth_hdr;
1077 struct vlan_ethhdr *vlan_hdr;
1078 struct fcoe_hdr *fcoe_hdr;
1079 struct fc_frame_header *fh;
1080 u32 tot_len, eth_hdr_len;
1081 int ret = 0;
1082 unsigned long flags;
1083
1084 fh = fc_frame_header_get(fp);
1085 skb = fp_skb(fp);
1086
1087 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1088 fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
1089 return 0;
1090
1091 if (!fnic->vlan_hw_insert) {
1092 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
1093 vlan_hdr = skb_push(skb, eth_hdr_len);
1094 eth_hdr = (struct ethhdr *)vlan_hdr;
1095 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1096 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1097 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1098 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1099 } else {
1100 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1101 eth_hdr = skb_push(skb, eth_hdr_len);
1102 eth_hdr->h_proto = htons(ETH_P_FCOE);
1103 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1104 }
1105
1106 if (fnic->ctlr.map_dest)
1107 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1108 else
1109 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1110 memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1111
1112 tot_len = skb->len;
1113 BUG_ON(tot_len % 4);
1114
1115 memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1116 fcoe_hdr->fcoe_sof = fr_sof(fp);
1117 if (FC_FCOE_VER)
1118 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1119
1120 pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
1121
1122 if (pci_dma_mapping_error(fnic->pdev, pa)) {
1123 ret = -ENOMEM;
1124 printk(KERN_ERR "DMA map failed with error %d\n", ret);
1125 goto free_skb_on_err;
1126 }
1127
1128 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
1129 (char *)eth_hdr, tot_len)) != 0) {
1130 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1131 }
1132
1133 spin_lock_irqsave(&fnic->wq_lock[0], flags);
1134
1135 if (!vnic_wq_desc_avail(wq)) {
1136 pci_unmap_single(fnic->pdev, pa,
1137 tot_len, PCI_DMA_TODEVICE);
1138 ret = -1;
1139 goto irq_restore;
1140 }
1141
1142 fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1143 0 /* hw inserts cos value */,
1144 fnic->vlan_id, 1, 1, 1);
1145
1146 irq_restore:
1147 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1148
1149 free_skb_on_err:
1150 if (ret)
1151 dev_kfree_skb_any(fp_skb(fp));
1152
1153 return ret;
1154 }
1155
1156 /*
1157 * fnic_send
1158 * Routine to send a raw frame
1159 */
1160 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1161 {
1162 struct fnic *fnic = lport_priv(lp);
1163 unsigned long flags;
1164
1165 if (fnic->in_remove) {
1166 dev_kfree_skb(fp_skb(fp));
1167 return -1;
1168 }
1169
1170 /*
1171 * Queue frame if in a transitional state.
1172 * This occurs while registering the Port_ID / MAC address after FLOGI.
1173 */
1174 spin_lock_irqsave(&fnic->fnic_lock, flags);
1175 if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1176 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1177 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1178 return 0;
1179 }
1180 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1181
1182 return fnic_send_frame(fnic, fp);
1183 }
1184
1185 /**
1186 * fnic_flush_tx() - send queued frames.
1187 * @fnic: fnic device
1188 *
1189 * Send frames that were waiting to go out in FC or Ethernet mode.
1190 * Whenever changing modes we purge queued frames, so these frames should
1191 * be queued for the stable mode that we're in, either FC or Ethernet.
1192 *
1193 * Called without fnic_lock held.
1194 */
1195 void fnic_flush_tx(struct fnic *fnic)
1196 {
1197 struct sk_buff *skb;
1198 struct fc_frame *fp;
1199
1200 while ((skb = skb_dequeue(&fnic->tx_queue))) {
1201 fp = (struct fc_frame *)skb;
1202 fnic_send_frame(fnic, fp);
1203 }
1204 }
1205
1206 /**
1207 * fnic_set_eth_mode() - put fnic into ethernet mode.
1208 * @fnic: fnic device
1209 *
1210 * Called without fnic lock held.
1211 */
1212 static void fnic_set_eth_mode(struct fnic *fnic)
1213 {
1214 unsigned long flags;
1215 enum fnic_state old_state;
1216 int ret;
1217
1218 spin_lock_irqsave(&fnic->fnic_lock, flags);
1219 again:
1220 old_state = fnic->state;
1221 switch (old_state) {
1222 case FNIC_IN_FC_MODE:
1223 case FNIC_IN_ETH_TRANS_FC_MODE:
1224 default:
1225 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1226 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1227
1228 ret = fnic_fw_reset_handler(fnic);
1229
1230 spin_lock_irqsave(&fnic->fnic_lock, flags);
1231 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1232 goto again;
1233 if (ret)
1234 fnic->state = old_state;
1235 break;
1236
1237 case FNIC_IN_FC_TRANS_ETH_MODE:
1238 case FNIC_IN_ETH_MODE:
1239 break;
1240 }
1241 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1242 }
1243
1244 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1245 struct cq_desc *cq_desc,
1246 struct vnic_wq_buf *buf, void *opaque)
1247 {
1248 struct sk_buff *skb = buf->os_buf;
1249 struct fc_frame *fp = (struct fc_frame *)skb;
1250 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1251
1252 pci_unmap_single(fnic->pdev, buf->dma_addr,
1253 buf->len, PCI_DMA_TODEVICE);
1254 dev_kfree_skb_irq(fp_skb(fp));
1255 buf->os_buf = NULL;
1256 }
1257
1258 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1259 struct cq_desc *cq_desc, u8 type,
1260 u16 q_number, u16 completed_index,
1261 void *opaque)
1262 {
1263 struct fnic *fnic = vnic_dev_priv(vdev);
1264 unsigned long flags;
1265
1266 spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1267 vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1268 fnic_wq_complete_frame_send, NULL);
1269 spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1270
1271 return 0;
1272 }
1273
1274 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1275 {
1276 unsigned int wq_work_done = 0;
1277 unsigned int i;
1278
1279 for (i = 0; i < fnic->raw_wq_count; i++) {
1280 wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1281 work_to_do,
1282 fnic_wq_cmpl_handler_cont,
1283 NULL);
1284 }
1285
1286 return wq_work_done;
1287 }
1288
1289
1290 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1291 {
1292 struct fc_frame *fp = buf->os_buf;
1293 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1294
1295 pci_unmap_single(fnic->pdev, buf->dma_addr,
1296 buf->len, PCI_DMA_TODEVICE);
1297
1298 dev_kfree_skb(fp_skb(fp));
1299 buf->os_buf = NULL;
1300 }
1301
1302 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1303 {
1304 unsigned long flags;
1305 struct fcoe_vlan *vlan;
1306 struct fcoe_vlan *next;
1307
1308 /*
1309 * indicate a link down to fcoe so that all fcf's are free'd
1310 * might not be required since we did this before sending vlan
1311 * discovery request
1312 */
1313 spin_lock_irqsave(&fnic->vlans_lock, flags);
1314 if (!list_empty(&fnic->vlans)) {
1315 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1316 list_del(&vlan->list);
1317 kfree(vlan);
1318 }
1319 }
1320 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1321 }
1322
1323 void fnic_handle_fip_timer(struct fnic *fnic)
1324 {
1325 unsigned long flags;
1326 struct fcoe_vlan *vlan;
1327 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1328 u64 sol_time;
1329
1330 spin_lock_irqsave(&fnic->fnic_lock, flags);
1331 if (fnic->stop_rx_link_events) {
1332 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1333 return;
1334 }
1335 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1336
1337 if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
1338 return;
1339
1340 spin_lock_irqsave(&fnic->vlans_lock, flags);
1341 if (list_empty(&fnic->vlans)) {
1342 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1343 /* no vlans available, try again */
1344 if (printk_ratelimit())
1345 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1346 "Start VLAN Discovery\n");
1347 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1348 return;
1349 }
1350
1351 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1352 shost_printk(KERN_DEBUG, fnic->lport->host,
1353 "fip_timer: vlan %d state %d sol_count %d\n",
1354 vlan->vid, vlan->state, vlan->sol_count);
1355 switch (vlan->state) {
1356 case FIP_VLAN_USED:
1357 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1358 "FIP VLAN is selected for FC transaction\n");
1359 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1360 break;
1361 case FIP_VLAN_FAILED:
1362 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1363 /* if all vlans are in failed state, restart vlan disc */
1364 if (printk_ratelimit())
1365 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1366 "Start VLAN Discovery\n");
1367 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1368 break;
1369 case FIP_VLAN_SENT:
1370 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1371 /*
1372 * no response on this vlan, remove from the list.
1373 * Try the next vlan
1374 */
1375 shost_printk(KERN_INFO, fnic->lport->host,
1376 "Dequeue this VLAN ID %d from list\n",
1377 vlan->vid);
1378 list_del(&vlan->list);
1379 kfree(vlan);
1380 vlan = NULL;
1381 if (list_empty(&fnic->vlans)) {
1382 /* we exhausted all vlans, restart vlan disc */
1383 spin_unlock_irqrestore(&fnic->vlans_lock,
1384 flags);
1385 shost_printk(KERN_INFO, fnic->lport->host,
1386 "fip_timer: vlan list empty, "
1387 "trigger vlan disc\n");
1388 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1389 return;
1390 }
1391 /* check the next vlan */
1392 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1393 list);
1394 fnic->set_vlan(fnic, vlan->vid);
1395 vlan->state = FIP_VLAN_SENT; /* sent now */
1396 }
1397 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1398 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
1399 vlan->sol_count++;
1400 sol_time = jiffies + msecs_to_jiffies
1401 (FCOE_CTLR_START_DELAY);
1402 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1403 break;
1404 }
1405 }
Linux with added FPC-III support