blob: 1671325aec7f11bba5c5c557502006554457b937 [file] [log] [blame]
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090020#include <linux/slab.h>
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070021#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>
Joe Eykholt78112e52009-11-03 11:49:22 -080027#include <scsi/fc/fc_fip.h>
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070028#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"
Hiral Pateld3c995f2013-02-25 16:18:36 -080034#include "fnic_fip.h"
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070035#include "cq_enet_desc.h"
36#include "cq_exch_desc.h"
37
Hiral Pateld3c995f2013-02-25 16:18:36 -080038static u8 fcoe_all_fcfs[ETH_ALEN];
39struct workqueue_struct *fnic_fip_queue;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070040struct workqueue_struct *fnic_event_queue;
41
Joe Eykholt78112e52009-11-03 11:49:22 -080042static void fnic_set_eth_mode(struct fnic *);
Hiral Pateld3c995f2013-02-25 16:18:36 -080043static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
44static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
45static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
46static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
47static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
Joe Eykholt78112e52009-11-03 11:49:22 -080048
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070049void 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 if (old_link_status == fnic->link_status) {
69 if (!fnic->link_status)
70 /* DOWN -> DOWN */
71 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
72 else {
73 if (old_link_down_cnt != fnic->link_down_cnt) {
74 /* UP -> DOWN -> UP */
75 fnic->lport->host_stats.link_failure_count++;
76 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
77 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
78 "link down\n");
Joe Eykholt78112e52009-11-03 11:49:22 -080079 fcoe_ctlr_link_down(&fnic->ctlr);
Hiral Pateld3c995f2013-02-25 16:18:36 -080080 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
81 /* start FCoE VLAN discovery */
82 fnic_fcoe_send_vlan_req(fnic);
83 return;
84 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070085 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
86 "link up\n");
Joe Eykholt78112e52009-11-03 11:49:22 -080087 fcoe_ctlr_link_up(&fnic->ctlr);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070088 } else
89 /* UP -> UP */
90 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
91 }
92 } else if (fnic->link_status) {
93 /* DOWN -> UP */
94 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
Hiral Pateld3c995f2013-02-25 16:18:36 -080095 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
96 /* start FCoE VLAN discovery */
97 fnic_fcoe_send_vlan_req(fnic);
98 return;
99 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700100 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
Joe Eykholt78112e52009-11-03 11:49:22 -0800101 fcoe_ctlr_link_up(&fnic->ctlr);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700102 } else {
103 /* UP -> DOWN */
104 fnic->lport->host_stats.link_failure_count++;
105 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
106 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
Joe Eykholt78112e52009-11-03 11:49:22 -0800107 fcoe_ctlr_link_down(&fnic->ctlr);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700108 }
109
110}
111
112/*
113 * This function passes incoming fabric frames to libFC
114 */
115void fnic_handle_frame(struct work_struct *work)
116{
117 struct fnic *fnic = container_of(work, struct fnic, frame_work);
118 struct fc_lport *lp = fnic->lport;
119 unsigned long flags;
120 struct sk_buff *skb;
121 struct fc_frame *fp;
122
123 while ((skb = skb_dequeue(&fnic->frame_queue))) {
124
125 spin_lock_irqsave(&fnic->fnic_lock, flags);
126 if (fnic->stop_rx_link_events) {
127 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
128 dev_kfree_skb(skb);
129 return;
130 }
131 fp = (struct fc_frame *)skb;
Joe Eykholt78112e52009-11-03 11:49:22 -0800132
133 /*
134 * If we're in a transitional state, just re-queue and return.
135 * The queue will be serviced when we get to a stable state.
136 */
137 if (fnic->state != FNIC_IN_FC_MODE &&
138 fnic->state != FNIC_IN_ETH_MODE) {
139 skb_queue_head(&fnic->frame_queue, skb);
140 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
141 return;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700142 }
143 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
144
Vasu Dev52ff8782009-07-29 17:05:10 -0700145 fc_exch_recv(lp, fp);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700146 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700147}
148
Hiral Pateld3c995f2013-02-25 16:18:36 -0800149void fnic_fcoe_evlist_free(struct fnic *fnic)
150{
151 struct fnic_event *fevt = NULL;
152 struct fnic_event *next = NULL;
153 unsigned long flags;
154
155 spin_lock_irqsave(&fnic->fnic_lock, flags);
156 if (list_empty(&fnic->evlist)) {
157 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
158 return;
159 }
160
161 list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
162 list_del(&fevt->list);
163 kfree(fevt);
164 }
165 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
166}
167
168void fnic_handle_event(struct work_struct *work)
169{
170 struct fnic *fnic = container_of(work, struct fnic, event_work);
171 struct fnic_event *fevt = NULL;
172 struct fnic_event *next = NULL;
173 unsigned long flags;
174
175 spin_lock_irqsave(&fnic->fnic_lock, flags);
176 if (list_empty(&fnic->evlist)) {
177 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
178 return;
179 }
180
181 list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
182 if (fnic->stop_rx_link_events) {
183 list_del(&fevt->list);
184 kfree(fevt);
185 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
186 return;
187 }
188 /*
189 * If we're in a transitional state, just re-queue and return.
190 * The queue will be serviced when we get to a stable state.
191 */
192 if (fnic->state != FNIC_IN_FC_MODE &&
193 fnic->state != FNIC_IN_ETH_MODE) {
194 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
195 return;
196 }
197
198 list_del(&fevt->list);
199 switch (fevt->event) {
200 case FNIC_EVT_START_VLAN_DISC:
201 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
202 fnic_fcoe_send_vlan_req(fnic);
203 spin_lock_irqsave(&fnic->fnic_lock, flags);
204 break;
205 case FNIC_EVT_START_FCF_DISC:
206 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
207 "Start FCF Discovery\n");
208 fnic_fcoe_start_fcf_disc(fnic);
209 break;
210 default:
211 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
212 "Unknown event 0x%x\n", fevt->event);
213 break;
214 }
215 kfree(fevt);
216 }
217 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
218}
219
220/**
221 * Check if the Received FIP FLOGI frame is rejected
222 * @fip: The FCoE controller that received the frame
223 * @skb: The received FIP frame
224 *
225 * Returns non-zero if the frame is rejected with unsupported cmd with
226 * insufficient resource els explanation.
227 */
228static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
229 struct sk_buff *skb)
230{
231 struct fc_lport *lport = fip->lp;
232 struct fip_header *fiph;
233 struct fc_frame_header *fh = NULL;
234 struct fip_desc *desc;
235 struct fip_encaps *els;
236 enum fip_desc_type els_dtype = 0;
237 u16 op;
238 u8 els_op;
239 u8 sub;
240
241 size_t els_len = 0;
242 size_t rlen;
243 size_t dlen = 0;
244
245 if (skb_linearize(skb))
246 return 0;
247
248 if (skb->len < sizeof(*fiph))
249 return 0;
250
251 fiph = (struct fip_header *)skb->data;
252 op = ntohs(fiph->fip_op);
253 sub = fiph->fip_subcode;
254
255 if (op != FIP_OP_LS)
256 return 0;
257
258 if (sub != FIP_SC_REP)
259 return 0;
260
261 rlen = ntohs(fiph->fip_dl_len) * 4;
262 if (rlen + sizeof(*fiph) > skb->len)
263 return 0;
264
265 desc = (struct fip_desc *)(fiph + 1);
266 dlen = desc->fip_dlen * FIP_BPW;
267
268 if (desc->fip_dtype == FIP_DT_FLOGI) {
269
270 shost_printk(KERN_DEBUG, lport->host,
271 " FIP TYPE FLOGI: fab name:%llx "
272 "vfid:%d map:%x\n",
273 fip->sel_fcf->fabric_name, fip->sel_fcf->vfid,
274 fip->sel_fcf->fc_map);
275 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
276 return 0;
277
278 els_len = dlen - sizeof(*els);
279 els = (struct fip_encaps *)desc;
280 fh = (struct fc_frame_header *)(els + 1);
281 els_dtype = desc->fip_dtype;
282
283 if (!fh)
284 return 0;
285
286 /*
287 * ELS command code, reason and explanation should be = Reject,
288 * unsupported command and insufficient resource
289 */
290 els_op = *(u8 *)(fh + 1);
291 if (els_op == ELS_LS_RJT) {
292 shost_printk(KERN_INFO, lport->host,
293 "Flogi Request Rejected by Switch\n");
294 return 1;
295 }
296 shost_printk(KERN_INFO, lport->host,
297 "Flogi Request Accepted by Switch\n");
298 }
299 return 0;
300}
301
302static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
303{
304 struct fcoe_ctlr *fip = &fnic->ctlr;
Hiral Patel67125b02013-09-12 17:45:42 -0700305 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Hiral Pateld3c995f2013-02-25 16:18:36 -0800306 struct sk_buff *skb;
307 char *eth_fr;
308 int fr_len;
309 struct fip_vlan *vlan;
310 u64 vlan_tov;
311
312 fnic_fcoe_reset_vlans(fnic);
313 fnic->set_vlan(fnic, 0);
314 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
315 "Sending VLAN request...\n");
316 skb = dev_alloc_skb(sizeof(struct fip_vlan));
317 if (!skb)
318 return;
319
320 fr_len = sizeof(*vlan);
321 eth_fr = (char *)skb->data;
322 vlan = (struct fip_vlan *)eth_fr;
323
324 memset(vlan, 0, sizeof(*vlan));
325 memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
326 memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
327 vlan->eth.h_proto = htons(ETH_P_FIP);
328
329 vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
330 vlan->fip.fip_op = htons(FIP_OP_VLAN);
331 vlan->fip.fip_subcode = FIP_SC_VL_REQ;
332 vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
333
334 vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
335 vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
336 memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
337
338 vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
339 vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
340 put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
Hiral Patel67125b02013-09-12 17:45:42 -0700341 atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
Hiral Pateld3c995f2013-02-25 16:18:36 -0800342
343 skb_put(skb, sizeof(*vlan));
344 skb->protocol = htons(ETH_P_FIP);
345 skb_reset_mac_header(skb);
346 skb_reset_network_header(skb);
347 fip->send(fip, skb);
348
349 /* set a timer so that we can retry if there no response */
350 vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
351 mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
352}
353
354static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
355{
356 struct fcoe_ctlr *fip = &fnic->ctlr;
357 struct fip_header *fiph;
358 struct fip_desc *desc;
Hiral Patel67125b02013-09-12 17:45:42 -0700359 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Hiral Pateld3c995f2013-02-25 16:18:36 -0800360 u16 vid;
361 size_t rlen;
362 size_t dlen;
363 struct fcoe_vlan *vlan;
364 u64 sol_time;
365 unsigned long flags;
366
367 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
368 "Received VLAN response...\n");
369
370 fiph = (struct fip_header *) skb->data;
371
372 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
373 "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
374 ntohs(fiph->fip_op), fiph->fip_subcode);
375
376 rlen = ntohs(fiph->fip_dl_len) * 4;
377 fnic_fcoe_reset_vlans(fnic);
378 spin_lock_irqsave(&fnic->vlans_lock, flags);
379 desc = (struct fip_desc *)(fiph + 1);
380 while (rlen > 0) {
381 dlen = desc->fip_dlen * FIP_BPW;
382 switch (desc->fip_dtype) {
383 case FIP_DT_VLAN:
384 vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
385 shost_printk(KERN_INFO, fnic->lport->host,
386 "process_vlan_resp: FIP VLAN %d\n", vid);
387 vlan = kmalloc(sizeof(*vlan),
388 GFP_ATOMIC);
389 if (!vlan) {
390 /* retry from timer */
391 spin_unlock_irqrestore(&fnic->vlans_lock,
392 flags);
393 goto out;
394 }
395 memset(vlan, 0, sizeof(struct fcoe_vlan));
396 vlan->vid = vid & 0x0fff;
397 vlan->state = FIP_VLAN_AVAIL;
398 list_add_tail(&vlan->list, &fnic->vlans);
399 break;
400 }
401 desc = (struct fip_desc *)((char *)desc + dlen);
402 rlen -= dlen;
403 }
404
405 /* any VLAN descriptors present ? */
406 if (list_empty(&fnic->vlans)) {
407 /* retry from timer */
Hiral Patel67125b02013-09-12 17:45:42 -0700408 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
Hiral Pateld3c995f2013-02-25 16:18:36 -0800409 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
410 "No VLAN descriptors in FIP VLAN response\n");
411 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
412 goto out;
413 }
414
415 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
416 fnic->set_vlan(fnic, vlan->vid);
417 vlan->state = FIP_VLAN_SENT; /* sent now */
418 vlan->sol_count++;
419 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
420
421 /* start the solicitation */
422 fcoe_ctlr_link_up(fip);
423
424 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
425 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
426out:
427 return;
428}
429
430static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
431{
432 unsigned long flags;
433 struct fcoe_vlan *vlan;
434 u64 sol_time;
435
436 spin_lock_irqsave(&fnic->vlans_lock, flags);
437 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
438 fnic->set_vlan(fnic, vlan->vid);
439 vlan->state = FIP_VLAN_SENT; /* sent now */
440 vlan->sol_count = 1;
441 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
442
443 /* start the solicitation */
444 fcoe_ctlr_link_up(&fnic->ctlr);
445
446 sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
447 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
448}
449
450static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
451{
452 unsigned long flags;
453 struct fcoe_vlan *fvlan;
454
455 spin_lock_irqsave(&fnic->vlans_lock, flags);
456 if (list_empty(&fnic->vlans)) {
457 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
458 return -EINVAL;
459 }
460
461 fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
462 if (fvlan->state == FIP_VLAN_USED) {
463 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
464 return 0;
465 }
466
467 if (fvlan->state == FIP_VLAN_SENT) {
468 fvlan->state = FIP_VLAN_USED;
469 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
470 return 0;
471 }
472 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
473 return -EINVAL;
474}
475
476static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
477{
478 struct fnic_event *fevt;
479 unsigned long flags;
480
481 fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
482 if (!fevt)
483 return;
484
485 fevt->fnic = fnic;
486 fevt->event = ev;
487
488 spin_lock_irqsave(&fnic->fnic_lock, flags);
489 list_add_tail(&fevt->list, &fnic->evlist);
490 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
491
492 schedule_work(&fnic->event_work);
493}
494
495static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
496{
497 struct fip_header *fiph;
498 int ret = 1;
499 u16 op;
500 u8 sub;
501
502 if (!skb || !(skb->data))
503 return -1;
504
505 if (skb_linearize(skb))
506 goto drop;
507
508 fiph = (struct fip_header *)skb->data;
509 op = ntohs(fiph->fip_op);
510 sub = fiph->fip_subcode;
511
512 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
513 goto drop;
514
515 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
516 goto drop;
517
518 if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
519 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
520 goto drop;
521 /* pass it on to fcoe */
522 ret = 1;
523 } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) {
524 /* set the vlan as used */
525 fnic_fcoe_process_vlan_resp(fnic, skb);
526 ret = 0;
527 } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
528 /* received CVL request, restart vlan disc */
529 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
530 /* pass it on to fcoe */
531 ret = 1;
532 }
533drop:
534 return ret;
535}
536
537void fnic_handle_fip_frame(struct work_struct *work)
538{
539 struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
Hiral Patel67125b02013-09-12 17:45:42 -0700540 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Hiral Pateld3c995f2013-02-25 16:18:36 -0800541 unsigned long flags;
542 struct sk_buff *skb;
543 struct ethhdr *eh;
544
545 while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
546 spin_lock_irqsave(&fnic->fnic_lock, flags);
547 if (fnic->stop_rx_link_events) {
548 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
549 dev_kfree_skb(skb);
550 return;
551 }
552 /*
553 * If we're in a transitional state, just re-queue and return.
554 * The queue will be serviced when we get to a stable state.
555 */
556 if (fnic->state != FNIC_IN_FC_MODE &&
557 fnic->state != FNIC_IN_ETH_MODE) {
558 skb_queue_head(&fnic->fip_frame_queue, skb);
559 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
560 return;
561 }
562 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
563 eh = (struct ethhdr *)skb->data;
564 if (eh->h_proto == htons(ETH_P_FIP)) {
565 skb_pull(skb, sizeof(*eh));
566 if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
567 dev_kfree_skb(skb);
568 continue;
569 }
570 /*
571 * If there's FLOGI rejects - clear all
572 * fcf's & restart from scratch
573 */
574 if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
Hiral Patel67125b02013-09-12 17:45:42 -0700575 atomic64_inc(
576 &fnic_stats->vlan_stats.flogi_rejects);
Hiral Pateld3c995f2013-02-25 16:18:36 -0800577 shost_printk(KERN_INFO, fnic->lport->host,
578 "Trigger a Link down - VLAN Disc\n");
579 fcoe_ctlr_link_down(&fnic->ctlr);
580 /* start FCoE VLAN discovery */
581 fnic_fcoe_send_vlan_req(fnic);
582 dev_kfree_skb(skb);
583 continue;
584 }
585 fcoe_ctlr_recv(&fnic->ctlr, skb);
586 continue;
587 }
588 }
589}
590
Joe Eykholt78112e52009-11-03 11:49:22 -0800591/**
592 * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
593 * @fnic: fnic instance.
594 * @skb: Ethernet Frame.
595 */
596static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700597{
598 struct fc_frame *fp;
599 struct ethhdr *eh;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700600 struct fcoe_hdr *fcoe_hdr;
601 struct fcoe_crc_eof *ft;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700602
Joe Eykholt78112e52009-11-03 11:49:22 -0800603 /*
604 * Undo VLAN encapsulation if present.
605 */
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700606 eh = (struct ethhdr *)skb->data;
Joe Eykholt78112e52009-11-03 11:49:22 -0800607 if (eh->h_proto == htons(ETH_P_8021Q)) {
608 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
609 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
610 skb_reset_mac_header(skb);
611 }
612 if (eh->h_proto == htons(ETH_P_FIP)) {
Hiral Pateld7fadce2013-02-25 16:18:37 -0800613 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
614 printk(KERN_ERR "Dropped FIP frame, as firmware "
615 "uses non-FIP mode, Enable FIP "
616 "using UCSM\n");
617 goto drop;
618 }
Hiral Pateld3c995f2013-02-25 16:18:36 -0800619 skb_queue_tail(&fnic->fip_frame_queue, skb);
620 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
Joe Eykholt78112e52009-11-03 11:49:22 -0800621 return 1; /* let caller know packet was used */
622 }
623 if (eh->h_proto != htons(ETH_P_FCOE))
624 goto drop;
625 skb_set_network_header(skb, sizeof(*eh));
626 skb_pull(skb, sizeof(*eh));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700627
628 fcoe_hdr = (struct fcoe_hdr *)skb->data;
629 if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
Joe Eykholt78112e52009-11-03 11:49:22 -0800630 goto drop;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700631
632 fp = (struct fc_frame *)skb;
633 fc_frame_init(fp);
634 fr_sof(fp) = fcoe_hdr->fcoe_sof;
635 skb_pull(skb, sizeof(struct fcoe_hdr));
Joe Eykholt78112e52009-11-03 11:49:22 -0800636 skb_reset_transport_header(skb);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700637
Joe Eykholt78112e52009-11-03 11:49:22 -0800638 ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700639 fr_eof(fp) = ft->fcoe_eof;
Joe Eykholt78112e52009-11-03 11:49:22 -0800640 skb_trim(skb, skb->len - sizeof(*ft));
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700641 return 0;
Joe Eykholt78112e52009-11-03 11:49:22 -0800642drop:
643 dev_kfree_skb_irq(skb);
644 return -1;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700645}
646
Joe Eykholt78112e52009-11-03 11:49:22 -0800647/**
648 * fnic_update_mac_locked() - set data MAC address and filters.
649 * @fnic: fnic instance.
650 * @new: newly-assigned FCoE MAC address.
651 *
652 * Called with the fnic lock held.
653 */
654void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700655{
Joe Eykholt78112e52009-11-03 11:49:22 -0800656 u8 *ctl = fnic->ctlr.ctl_src_addr;
657 u8 *data = fnic->data_src_addr;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700658
Joe Eykholt78112e52009-11-03 11:49:22 -0800659 if (is_zero_ether_addr(new))
660 new = ctl;
Joe Perches6942df72013-09-02 03:32:33 +0000661 if (ether_addr_equal(data, new))
Joe Eykholt78112e52009-11-03 11:49:22 -0800662 return;
663 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
Joe Perches6942df72013-09-02 03:32:33 +0000664 if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
Joe Eykholt78112e52009-11-03 11:49:22 -0800665 vnic_dev_del_addr(fnic->vdev, data);
666 memcpy(data, new, ETH_ALEN);
Joe Perches6942df72013-09-02 03:32:33 +0000667 if (!ether_addr_equal(new, ctl))
Joe Eykholt78112e52009-11-03 11:49:22 -0800668 vnic_dev_add_addr(fnic->vdev, new);
669}
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700670
Joe Eykholt78112e52009-11-03 11:49:22 -0800671/**
672 * fnic_update_mac() - set data MAC address and filters.
673 * @lport: local port.
674 * @new: newly-assigned FCoE MAC address.
675 */
676void fnic_update_mac(struct fc_lport *lport, u8 *new)
677{
678 struct fnic *fnic = lport_priv(lport);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700679
Joe Eykholt78112e52009-11-03 11:49:22 -0800680 spin_lock_irq(&fnic->fnic_lock);
681 fnic_update_mac_locked(fnic, new);
682 spin_unlock_irq(&fnic->fnic_lock);
683}
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700684
Joe Eykholt78112e52009-11-03 11:49:22 -0800685/**
686 * fnic_set_port_id() - set the port_ID after successful FLOGI.
687 * @lport: local port.
688 * @port_id: assigned FC_ID.
689 * @fp: received frame containing the FLOGI accept or NULL.
690 *
691 * This is called from libfc when a new FC_ID has been assigned.
692 * This causes us to reset the firmware to FC_MODE and setup the new MAC
693 * address and FC_ID.
694 *
695 * It is also called with FC_ID 0 when we're logged off.
696 *
697 * If the FC_ID is due to point-to-point, fp may be NULL.
698 */
699void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
700{
701 struct fnic *fnic = lport_priv(lport);
702 u8 *mac;
703 int ret;
704
705 FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
706 port_id, fp);
707
708 /*
709 * If we're clearing the FC_ID, change to use the ctl_src_addr.
710 * Set ethernet mode to send FLOGI.
711 */
712 if (!port_id) {
713 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
714 fnic_set_eth_mode(fnic);
715 return;
716 }
717
718 if (fp) {
719 mac = fr_cb(fp)->granted_mac;
720 if (is_zero_ether_addr(mac)) {
721 /* non-FIP - FLOGI already accepted - ignore return */
722 fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700723 }
Joe Eykholt78112e52009-11-03 11:49:22 -0800724 fnic_update_mac(lport, mac);
725 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700726
Joe Eykholt78112e52009-11-03 11:49:22 -0800727 /* Change state to reflect transition to FC mode */
728 spin_lock_irq(&fnic->fnic_lock);
729 if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700730 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
Joe Eykholt78112e52009-11-03 11:49:22 -0800731 else {
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700732 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
733 "Unexpected fnic state %s while"
734 " processing flogi resp\n",
735 fnic_state_to_str(fnic->state));
Joe Eykholt78112e52009-11-03 11:49:22 -0800736 spin_unlock_irq(&fnic->fnic_lock);
737 return;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700738 }
Joe Eykholt78112e52009-11-03 11:49:22 -0800739 spin_unlock_irq(&fnic->fnic_lock);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700740
741 /*
Joe Eykholt78112e52009-11-03 11:49:22 -0800742 * Send FLOGI registration to firmware to set up FC mode.
743 * The new address will be set up when registration completes.
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700744 */
Joe Eykholt78112e52009-11-03 11:49:22 -0800745 ret = fnic_flogi_reg_handler(fnic, port_id);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700746
747 if (ret < 0) {
Joe Eykholt78112e52009-11-03 11:49:22 -0800748 spin_lock_irq(&fnic->fnic_lock);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700749 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
750 fnic->state = FNIC_IN_ETH_MODE;
Joe Eykholt78112e52009-11-03 11:49:22 -0800751 spin_unlock_irq(&fnic->fnic_lock);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700752 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700753}
754
755static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
756 *cq_desc, struct vnic_rq_buf *buf,
757 int skipped __attribute__((unused)),
758 void *opaque)
759{
760 struct fnic *fnic = vnic_dev_priv(rq->vdev);
761 struct sk_buff *skb;
762 struct fc_frame *fp;
Hiral Patel67125b02013-09-12 17:45:42 -0700763 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700764 unsigned int eth_hdrs_stripped;
765 u8 type, color, eop, sop, ingress_port, vlan_stripped;
766 u8 fcoe = 0, fcoe_sof, fcoe_eof;
767 u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
768 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
769 u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
770 u8 fcs_ok = 1, packet_error = 0;
771 u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
772 u32 rss_hash;
773 u16 exchange_id, tmpl;
774 u8 sof = 0;
775 u8 eof = 0;
776 u32 fcp_bytes_written = 0;
777 unsigned long flags;
778
779 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
780 PCI_DMA_FROMDEVICE);
781 skb = buf->os_buf;
Joe Eykholt78112e52009-11-03 11:49:22 -0800782 fp = (struct fc_frame *)skb;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700783 buf->os_buf = NULL;
784
785 cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
786 if (type == CQ_DESC_TYPE_RQ_FCP) {
787 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
788 &type, &color, &q_number, &completed_index,
789 &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
790 &tmpl, &fcp_bytes_written, &sof, &eof,
791 &ingress_port, &packet_error,
792 &fcoe_enc_error, &fcs_ok, &vlan_stripped,
793 &vlan);
794 eth_hdrs_stripped = 1;
Joe Eykholt78112e52009-11-03 11:49:22 -0800795 skb_trim(skb, fcp_bytes_written);
796 fr_sof(fp) = sof;
797 fr_eof(fp) = eof;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700798
799 } else if (type == CQ_DESC_TYPE_RQ_ENET) {
800 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
801 &type, &color, &q_number, &completed_index,
802 &ingress_port, &fcoe, &eop, &sop,
803 &rss_type, &csum_not_calc, &rss_hash,
804 &bytes_written, &packet_error,
805 &vlan_stripped, &vlan, &checksum,
806 &fcoe_sof, &fcoe_fc_crc_ok,
807 &fcoe_enc_error, &fcoe_eof,
808 &tcp_udp_csum_ok, &udp, &tcp,
809 &ipv4_csum_ok, &ipv6, &ipv4,
810 &ipv4_fragment, &fcs_ok);
811 eth_hdrs_stripped = 0;
Joe Eykholt78112e52009-11-03 11:49:22 -0800812 skb_trim(skb, bytes_written);
813 if (!fcs_ok) {
Hiral Patel67125b02013-09-12 17:45:42 -0700814 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
Joe Eykholt78112e52009-11-03 11:49:22 -0800815 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
816 "fcs error. dropping packet.\n");
817 goto drop;
818 }
819 if (fnic_import_rq_eth_pkt(fnic, skb))
820 return;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700821
822 } else {
823 /* wrong CQ type*/
824 shost_printk(KERN_ERR, fnic->lport->host,
825 "fnic rq_cmpl wrong cq type x%x\n", type);
826 goto drop;
827 }
828
829 if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
Hiral Patel67125b02013-09-12 17:45:42 -0700830 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700831 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
832 "fnic rq_cmpl fcoe x%x fcsok x%x"
833 " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
834 " x%x\n",
835 fcoe, fcs_ok, packet_error,
836 fcoe_fc_crc_ok, fcoe_enc_error);
837 goto drop;
838 }
839
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700840 spin_lock_irqsave(&fnic->fnic_lock, flags);
841 if (fnic->stop_rx_link_events) {
842 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
843 goto drop;
844 }
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700845 fr_dev(fp) = fnic->lport;
846 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
847
848 skb_queue_tail(&fnic->frame_queue, skb);
849 queue_work(fnic_event_queue, &fnic->frame_work);
850
851 return;
852drop:
853 dev_kfree_skb_irq(skb);
854}
855
856static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
857 struct cq_desc *cq_desc, u8 type,
858 u16 q_number, u16 completed_index,
859 void *opaque)
860{
861 struct fnic *fnic = vnic_dev_priv(vdev);
862
863 vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
864 VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
865 NULL);
866 return 0;
867}
868
869int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
870{
871 unsigned int tot_rq_work_done = 0, cur_work_done;
872 unsigned int i;
873 int err;
874
875 for (i = 0; i < fnic->rq_count; i++) {
876 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
877 fnic_rq_cmpl_handler_cont,
878 NULL);
879 if (cur_work_done) {
880 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
881 if (err)
882 shost_printk(KERN_ERR, fnic->lport->host,
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300883 "fnic_alloc_rq_frame can't alloc"
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700884 " frame\n");
885 }
886 tot_rq_work_done += cur_work_done;
887 }
888
889 return tot_rq_work_done;
890}
891
892/*
893 * This function is called once at init time to allocate and fill RQ
894 * buffers. Subsequently, it is called in the interrupt context after RQ
895 * buffer processing to replenish the buffers in the RQ
896 */
897int fnic_alloc_rq_frame(struct vnic_rq *rq)
898{
899 struct fnic *fnic = vnic_dev_priv(rq->vdev);
900 struct sk_buff *skb;
901 u16 len;
902 dma_addr_t pa;
903
904 len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
905 skb = dev_alloc_skb(len);
906 if (!skb) {
907 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
908 "Unable to allocate RQ sk_buff\n");
909 return -ENOMEM;
910 }
911 skb_reset_mac_header(skb);
912 skb_reset_transport_header(skb);
913 skb_reset_network_header(skb);
914 skb_put(skb, len);
915 pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
916 fnic_queue_rq_desc(rq, skb, pa, len);
917 return 0;
918}
919
920void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
921{
922 struct fc_frame *fp = buf->os_buf;
923 struct fnic *fnic = vnic_dev_priv(rq->vdev);
924
925 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
926 PCI_DMA_FROMDEVICE);
927
928 dev_kfree_skb(fp_skb(fp));
929 buf->os_buf = NULL;
930}
931
Joe Eykholt78112e52009-11-03 11:49:22 -0800932/**
933 * fnic_eth_send() - Send Ethernet frame.
934 * @fip: fcoe_ctlr instance.
935 * @skb: Ethernet Frame, FIP, without VLAN encapsulation.
936 */
937void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700938{
Joe Eykholt78112e52009-11-03 11:49:22 -0800939 struct fnic *fnic = fnic_from_ctlr(fip);
940 struct vnic_wq *wq = &fnic->wq[0];
941 dma_addr_t pa;
942 struct ethhdr *eth_hdr;
943 struct vlan_ethhdr *vlan_hdr;
944 unsigned long flags;
945
946 if (!fnic->vlan_hw_insert) {
947 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
948 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb,
949 sizeof(*vlan_hdr) - sizeof(*eth_hdr));
950 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
951 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
952 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
953 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
954 }
955
956 pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
957
958 spin_lock_irqsave(&fnic->wq_lock[0], flags);
959 if (!vnic_wq_desc_avail(wq)) {
960 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
961 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
962 kfree_skb(skb);
963 return;
964 }
965
966 fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
Hiral Patelc0773b72012-12-10 01:21:30 -0800967 0 /* hw inserts cos value */,
968 fnic->vlan_id, 1);
Joe Eykholt78112e52009-11-03 11:49:22 -0800969 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700970}
971
Joe Eykholt78112e52009-11-03 11:49:22 -0800972/*
973 * Send FC frame.
974 */
975static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700976{
977 struct vnic_wq *wq = &fnic->wq[0];
978 struct sk_buff *skb;
979 dma_addr_t pa;
980 struct ethhdr *eth_hdr;
981 struct vlan_ethhdr *vlan_hdr;
982 struct fcoe_hdr *fcoe_hdr;
983 struct fc_frame_header *fh;
984 u32 tot_len, eth_hdr_len;
985 int ret = 0;
986 unsigned long flags;
987
988 fh = fc_frame_header_get(fp);
989 skb = fp_skb(fp);
990
Joe Eykholt78112e52009-11-03 11:49:22 -0800991 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
992 fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
993 return 0;
994
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700995 if (!fnic->vlan_hw_insert) {
996 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
997 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
998 eth_hdr = (struct ethhdr *)vlan_hdr;
999 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1000 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1001 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1002 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1003 } else {
1004 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1005 eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
1006 eth_hdr->h_proto = htons(ETH_P_FCOE);
1007 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1008 }
1009
Joe Eykholt78112e52009-11-03 11:49:22 -08001010 if (fnic->ctlr.map_dest)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001011 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
Joe Eykholt78112e52009-11-03 11:49:22 -08001012 else
1013 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1014 memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001015
1016 tot_len = skb->len;
1017 BUG_ON(tot_len % 4);
1018
1019 memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1020 fcoe_hdr->fcoe_sof = fr_sof(fp);
1021 if (FC_FCOE_VER)
1022 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1023
1024 pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
1025
1026 spin_lock_irqsave(&fnic->wq_lock[0], flags);
1027
1028 if (!vnic_wq_desc_avail(wq)) {
1029 pci_unmap_single(fnic->pdev, pa,
1030 tot_len, PCI_DMA_TODEVICE);
1031 ret = -1;
1032 goto fnic_send_frame_end;
1033 }
1034
1035 fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
Hiral Patelc0773b72012-12-10 01:21:30 -08001036 0 /* hw inserts cos value */,
1037 fnic->vlan_id, 1, 1, 1);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001038fnic_send_frame_end:
1039 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1040
1041 if (ret)
1042 dev_kfree_skb_any(fp_skb(fp));
1043
1044 return ret;
1045}
1046
1047/*
1048 * fnic_send
1049 * Routine to send a raw frame
1050 */
1051int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1052{
1053 struct fnic *fnic = lport_priv(lp);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001054 unsigned long flags;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001055
1056 if (fnic->in_remove) {
1057 dev_kfree_skb(fp_skb(fp));
Joe Eykholt78112e52009-11-03 11:49:22 -08001058 return -1;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001059 }
1060
Joe Eykholt78112e52009-11-03 11:49:22 -08001061 /*
1062 * Queue frame if in a transitional state.
1063 * This occurs while registering the Port_ID / MAC address after FLOGI.
1064 */
1065 spin_lock_irqsave(&fnic->fnic_lock, flags);
1066 if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1067 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1068 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1069 return 0;
1070 }
1071 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001072
Joe Eykholt78112e52009-11-03 11:49:22 -08001073 return fnic_send_frame(fnic, fp);
1074}
1075
1076/**
1077 * fnic_flush_tx() - send queued frames.
1078 * @fnic: fnic device
1079 *
1080 * Send frames that were waiting to go out in FC or Ethernet mode.
1081 * Whenever changing modes we purge queued frames, so these frames should
1082 * be queued for the stable mode that we're in, either FC or Ethernet.
1083 *
1084 * Called without fnic_lock held.
1085 */
1086void fnic_flush_tx(struct fnic *fnic)
1087{
1088 struct sk_buff *skb;
1089 struct fc_frame *fp;
1090
Brian Uchinod9e9ab52010-04-09 14:22:49 -07001091 while ((skb = skb_dequeue(&fnic->tx_queue))) {
Joe Eykholt78112e52009-11-03 11:49:22 -08001092 fp = (struct fc_frame *)skb;
1093 fnic_send_frame(fnic, fp);
1094 }
1095}
1096
1097/**
1098 * fnic_set_eth_mode() - put fnic into ethernet mode.
1099 * @fnic: fnic device
1100 *
1101 * Called without fnic lock held.
1102 */
1103static void fnic_set_eth_mode(struct fnic *fnic)
1104{
1105 unsigned long flags;
1106 enum fnic_state old_state;
1107 int ret;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001108
1109 spin_lock_irqsave(&fnic->fnic_lock, flags);
1110again:
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001111 old_state = fnic->state;
1112 switch (old_state) {
1113 case FNIC_IN_FC_MODE:
1114 case FNIC_IN_ETH_TRANS_FC_MODE:
1115 default:
1116 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001117 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1118
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001119 ret = fnic_fw_reset_handler(fnic);
1120
1121 spin_lock_irqsave(&fnic->fnic_lock, flags);
1122 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1123 goto again;
Joe Eykholt78112e52009-11-03 11:49:22 -08001124 if (ret)
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001125 fnic->state = old_state;
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001126 break;
1127
1128 case FNIC_IN_FC_TRANS_ETH_MODE:
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001129 case FNIC_IN_ETH_MODE:
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001130 break;
1131 }
Joe Eykholt78112e52009-11-03 11:49:22 -08001132 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001133}
1134
1135static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1136 struct cq_desc *cq_desc,
1137 struct vnic_wq_buf *buf, void *opaque)
1138{
1139 struct sk_buff *skb = buf->os_buf;
1140 struct fc_frame *fp = (struct fc_frame *)skb;
1141 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1142
1143 pci_unmap_single(fnic->pdev, buf->dma_addr,
1144 buf->len, PCI_DMA_TODEVICE);
1145 dev_kfree_skb_irq(fp_skb(fp));
1146 buf->os_buf = NULL;
1147}
1148
1149static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1150 struct cq_desc *cq_desc, u8 type,
1151 u16 q_number, u16 completed_index,
1152 void *opaque)
1153{
1154 struct fnic *fnic = vnic_dev_priv(vdev);
1155 unsigned long flags;
1156
1157 spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1158 vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1159 fnic_wq_complete_frame_send, NULL);
1160 spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1161
1162 return 0;
1163}
1164
1165int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1166{
1167 unsigned int wq_work_done = 0;
1168 unsigned int i;
1169
1170 for (i = 0; i < fnic->raw_wq_count; i++) {
1171 wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1172 work_to_do,
1173 fnic_wq_cmpl_handler_cont,
1174 NULL);
1175 }
1176
1177 return wq_work_done;
1178}
1179
1180
1181void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1182{
1183 struct fc_frame *fp = buf->os_buf;
1184 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1185
1186 pci_unmap_single(fnic->pdev, buf->dma_addr,
1187 buf->len, PCI_DMA_TODEVICE);
1188
1189 dev_kfree_skb(fp_skb(fp));
1190 buf->os_buf = NULL;
1191}
Hiral Pateld3c995f2013-02-25 16:18:36 -08001192
1193void fnic_fcoe_reset_vlans(struct fnic *fnic)
1194{
1195 unsigned long flags;
1196 struct fcoe_vlan *vlan;
1197 struct fcoe_vlan *next;
1198
1199 /*
1200 * indicate a link down to fcoe so that all fcf's are free'd
1201 * might not be required since we did this before sending vlan
1202 * discovery request
1203 */
1204 spin_lock_irqsave(&fnic->vlans_lock, flags);
1205 if (!list_empty(&fnic->vlans)) {
1206 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1207 list_del(&vlan->list);
1208 kfree(vlan);
1209 }
1210 }
1211 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1212}
1213
1214void fnic_handle_fip_timer(struct fnic *fnic)
1215{
1216 unsigned long flags;
1217 struct fcoe_vlan *vlan;
Hiral Patel67125b02013-09-12 17:45:42 -07001218 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
Hiral Pateld3c995f2013-02-25 16:18:36 -08001219 u64 sol_time;
1220
1221 spin_lock_irqsave(&fnic->fnic_lock, flags);
1222 if (fnic->stop_rx_link_events) {
1223 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1224 return;
1225 }
1226 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1227
1228 if (fnic->ctlr.mode == FIP_ST_NON_FIP)
1229 return;
1230
1231 spin_lock_irqsave(&fnic->vlans_lock, flags);
1232 if (list_empty(&fnic->vlans)) {
1233 /* no vlans available, try again */
1234 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1235 "Start VLAN Discovery\n");
1236 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1237 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1238 return;
1239 }
1240
1241 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1242 shost_printk(KERN_DEBUG, fnic->lport->host,
1243 "fip_timer: vlan %d state %d sol_count %d\n",
1244 vlan->vid, vlan->state, vlan->sol_count);
1245 switch (vlan->state) {
1246 case FIP_VLAN_USED:
1247 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1248 "FIP VLAN is selected for FC transaction\n");
1249 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1250 break;
1251 case FIP_VLAN_FAILED:
1252 /* if all vlans are in failed state, restart vlan disc */
1253 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1254 "Start VLAN Discovery\n");
1255 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1256 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1257 break;
1258 case FIP_VLAN_SENT:
1259 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1260 /*
1261 * no response on this vlan, remove from the list.
1262 * Try the next vlan
1263 */
1264 shost_printk(KERN_INFO, fnic->lport->host,
1265 "Dequeue this VLAN ID %d from list\n",
1266 vlan->vid);
1267 list_del(&vlan->list);
1268 kfree(vlan);
1269 vlan = NULL;
1270 if (list_empty(&fnic->vlans)) {
1271 /* we exhausted all vlans, restart vlan disc */
1272 spin_unlock_irqrestore(&fnic->vlans_lock,
1273 flags);
1274 shost_printk(KERN_INFO, fnic->lport->host,
1275 "fip_timer: vlan list empty, "
1276 "trigger vlan disc\n");
1277 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1278 return;
1279 }
1280 /* check the next vlan */
1281 vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1282 list);
1283 fnic->set_vlan(fnic, vlan->vid);
1284 vlan->state = FIP_VLAN_SENT; /* sent now */
1285 }
1286 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
Hiral Patel67125b02013-09-12 17:45:42 -07001287 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
Hiral Pateld3c995f2013-02-25 16:18:36 -08001288 vlan->sol_count++;
1289 sol_time = jiffies + msecs_to_jiffies
1290 (FCOE_CTLR_START_DELAY);
1291 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1292 break;
1293 }
1294}