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5df6d737 AJ |
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> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
5df6d737 AJ |
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> | |
78112e55 | 27 | #include <scsi/fc/fc_fip.h> |
5df6d737 AJ |
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" | |
d3c995f1 | 34 | #include "fnic_fip.h" |
5df6d737 AJ |
35 | #include "cq_enet_desc.h" |
36 | #include "cq_exch_desc.h" | |
37 | ||
d3c995f1 HP |
38 | static u8 fcoe_all_fcfs[ETH_ALEN]; |
39 | struct workqueue_struct *fnic_fip_queue; | |
5df6d737 AJ |
40 | struct workqueue_struct *fnic_event_queue; |
41 | ||
78112e55 | 42 | static void fnic_set_eth_mode(struct fnic *); |
d3c995f1 HP |
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); | |
78112e55 | 48 | |
5df6d737 AJ |
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 | 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"); | |
78112e55 | 79 | fcoe_ctlr_link_down(&fnic->ctlr); |
d3c995f1 HP |
80 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
81 | /* start FCoE VLAN discovery */ | |
82 | fnic_fcoe_send_vlan_req(fnic); | |
83 | return; | |
84 | } | |
5df6d737 AJ |
85 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
86 | "link up\n"); | |
78112e55 | 87 | fcoe_ctlr_link_up(&fnic->ctlr); |
5df6d737 AJ |
88 | } 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); | |
d3c995f1 HP |
95 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
96 | /* start FCoE VLAN discovery */ | |
97 | fnic_fcoe_send_vlan_req(fnic); | |
98 | return; | |
99 | } | |
5df6d737 | 100 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); |
78112e55 | 101 | fcoe_ctlr_link_up(&fnic->ctlr); |
5df6d737 AJ |
102 | } 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"); | |
78112e55 | 107 | fcoe_ctlr_link_down(&fnic->ctlr); |
5df6d737 AJ |
108 | } |
109 | ||
110 | } | |
111 | ||
112 | /* | |
113 | * This function passes incoming fabric frames to libFC | |
114 | */ | |
115 | void 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; | |
78112e55 JE |
132 | |
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; | |
5df6d737 AJ |
142 | } |
143 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
144 | ||
52ff878c | 145 | fc_exch_recv(lp, fp); |
5df6d737 | 146 | } |
5df6d737 AJ |
147 | } |
148 | ||
d3c995f1 HP |
149 | void 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 | ||
168 | void 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 | */ | |
228 | static 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 | ||
302 | static void fnic_fcoe_send_vlan_req(struct fnic *fnic) | |
303 | { | |
304 | struct fcoe_ctlr *fip = &fnic->ctlr; | |
305 | struct sk_buff *skb; | |
306 | char *eth_fr; | |
307 | int fr_len; | |
308 | struct fip_vlan *vlan; | |
309 | u64 vlan_tov; | |
310 | ||
311 | fnic_fcoe_reset_vlans(fnic); | |
312 | fnic->set_vlan(fnic, 0); | |
313 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, | |
314 | "Sending VLAN request...\n"); | |
315 | skb = dev_alloc_skb(sizeof(struct fip_vlan)); | |
316 | if (!skb) | |
317 | return; | |
318 | ||
319 | fr_len = sizeof(*vlan); | |
320 | eth_fr = (char *)skb->data; | |
321 | vlan = (struct fip_vlan *)eth_fr; | |
322 | ||
323 | memset(vlan, 0, sizeof(*vlan)); | |
324 | memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
325 | memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN); | |
326 | vlan->eth.h_proto = htons(ETH_P_FIP); | |
327 | ||
328 | vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
329 | vlan->fip.fip_op = htons(FIP_OP_VLAN); | |
330 | vlan->fip.fip_subcode = FIP_SC_VL_REQ; | |
331 | vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW); | |
332 | ||
333 | vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
334 | vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW; | |
335 | memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
336 | ||
337 | vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
338 | vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW; | |
339 | put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn); | |
340 | ||
341 | skb_put(skb, sizeof(*vlan)); | |
342 | skb->protocol = htons(ETH_P_FIP); | |
343 | skb_reset_mac_header(skb); | |
344 | skb_reset_network_header(skb); | |
345 | fip->send(fip, skb); | |
346 | ||
347 | /* set a timer so that we can retry if there no response */ | |
348 | vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV); | |
349 | mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov)); | |
350 | } | |
351 | ||
352 | static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb) | |
353 | { | |
354 | struct fcoe_ctlr *fip = &fnic->ctlr; | |
355 | struct fip_header *fiph; | |
356 | struct fip_desc *desc; | |
357 | u16 vid; | |
358 | size_t rlen; | |
359 | size_t dlen; | |
360 | struct fcoe_vlan *vlan; | |
361 | u64 sol_time; | |
362 | unsigned long flags; | |
363 | ||
364 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, | |
365 | "Received VLAN response...\n"); | |
366 | ||
367 | fiph = (struct fip_header *) skb->data; | |
368 | ||
369 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, | |
370 | "Received VLAN response... OP 0x%x SUB_OP 0x%x\n", | |
371 | ntohs(fiph->fip_op), fiph->fip_subcode); | |
372 | ||
373 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
374 | fnic_fcoe_reset_vlans(fnic); | |
375 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
376 | desc = (struct fip_desc *)(fiph + 1); | |
377 | while (rlen > 0) { | |
378 | dlen = desc->fip_dlen * FIP_BPW; | |
379 | switch (desc->fip_dtype) { | |
380 | case FIP_DT_VLAN: | |
381 | vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan); | |
382 | shost_printk(KERN_INFO, fnic->lport->host, | |
383 | "process_vlan_resp: FIP VLAN %d\n", vid); | |
384 | vlan = kmalloc(sizeof(*vlan), | |
385 | GFP_ATOMIC); | |
386 | if (!vlan) { | |
387 | /* retry from timer */ | |
388 | spin_unlock_irqrestore(&fnic->vlans_lock, | |
389 | flags); | |
390 | goto out; | |
391 | } | |
392 | memset(vlan, 0, sizeof(struct fcoe_vlan)); | |
393 | vlan->vid = vid & 0x0fff; | |
394 | vlan->state = FIP_VLAN_AVAIL; | |
395 | list_add_tail(&vlan->list, &fnic->vlans); | |
396 | break; | |
397 | } | |
398 | desc = (struct fip_desc *)((char *)desc + dlen); | |
399 | rlen -= dlen; | |
400 | } | |
401 | ||
402 | /* any VLAN descriptors present ? */ | |
403 | if (list_empty(&fnic->vlans)) { | |
404 | /* retry from timer */ | |
405 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, | |
406 | "No VLAN descriptors in FIP VLAN response\n"); | |
407 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
408 | goto out; | |
409 | } | |
410 | ||
411 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
412 | fnic->set_vlan(fnic, vlan->vid); | |
413 | vlan->state = FIP_VLAN_SENT; /* sent now */ | |
414 | vlan->sol_count++; | |
415 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
416 | ||
417 | /* start the solicitation */ | |
418 | fcoe_ctlr_link_up(fip); | |
419 | ||
420 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); | |
421 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); | |
422 | out: | |
423 | return; | |
424 | } | |
425 | ||
426 | static void fnic_fcoe_start_fcf_disc(struct fnic *fnic) | |
427 | { | |
428 | unsigned long flags; | |
429 | struct fcoe_vlan *vlan; | |
430 | u64 sol_time; | |
431 | ||
432 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
433 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
434 | fnic->set_vlan(fnic, vlan->vid); | |
435 | vlan->state = FIP_VLAN_SENT; /* sent now */ | |
436 | vlan->sol_count = 1; | |
437 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
438 | ||
439 | /* start the solicitation */ | |
440 | fcoe_ctlr_link_up(&fnic->ctlr); | |
441 | ||
442 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); | |
443 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); | |
444 | } | |
445 | ||
446 | static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag) | |
447 | { | |
448 | unsigned long flags; | |
449 | struct fcoe_vlan *fvlan; | |
450 | ||
451 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
452 | if (list_empty(&fnic->vlans)) { | |
453 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
458 | if (fvlan->state == FIP_VLAN_USED) { | |
459 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | if (fvlan->state == FIP_VLAN_SENT) { | |
464 | fvlan->state = FIP_VLAN_USED; | |
465 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
466 | return 0; | |
467 | } | |
468 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
469 | return -EINVAL; | |
470 | } | |
471 | ||
472 | static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev) | |
473 | { | |
474 | struct fnic_event *fevt; | |
475 | unsigned long flags; | |
476 | ||
477 | fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC); | |
478 | if (!fevt) | |
479 | return; | |
480 | ||
481 | fevt->fnic = fnic; | |
482 | fevt->event = ev; | |
483 | ||
484 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
485 | list_add_tail(&fevt->list, &fnic->evlist); | |
486 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
487 | ||
488 | schedule_work(&fnic->event_work); | |
489 | } | |
490 | ||
491 | static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb) | |
492 | { | |
493 | struct fip_header *fiph; | |
494 | int ret = 1; | |
495 | u16 op; | |
496 | u8 sub; | |
497 | ||
498 | if (!skb || !(skb->data)) | |
499 | return -1; | |
500 | ||
501 | if (skb_linearize(skb)) | |
502 | goto drop; | |
503 | ||
504 | fiph = (struct fip_header *)skb->data; | |
505 | op = ntohs(fiph->fip_op); | |
506 | sub = fiph->fip_subcode; | |
507 | ||
508 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) | |
509 | goto drop; | |
510 | ||
511 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
512 | goto drop; | |
513 | ||
514 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) { | |
515 | if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags))) | |
516 | goto drop; | |
517 | /* pass it on to fcoe */ | |
518 | ret = 1; | |
519 | } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) { | |
520 | /* set the vlan as used */ | |
521 | fnic_fcoe_process_vlan_resp(fnic, skb); | |
522 | ret = 0; | |
523 | } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) { | |
524 | /* received CVL request, restart vlan disc */ | |
525 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
526 | /* pass it on to fcoe */ | |
527 | ret = 1; | |
528 | } | |
529 | drop: | |
530 | return ret; | |
531 | } | |
532 | ||
533 | void fnic_handle_fip_frame(struct work_struct *work) | |
534 | { | |
535 | struct fnic *fnic = container_of(work, struct fnic, fip_frame_work); | |
536 | unsigned long flags; | |
537 | struct sk_buff *skb; | |
538 | struct ethhdr *eh; | |
539 | ||
540 | while ((skb = skb_dequeue(&fnic->fip_frame_queue))) { | |
541 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
542 | if (fnic->stop_rx_link_events) { | |
543 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
544 | dev_kfree_skb(skb); | |
545 | return; | |
546 | } | |
547 | /* | |
548 | * If we're in a transitional state, just re-queue and return. | |
549 | * The queue will be serviced when we get to a stable state. | |
550 | */ | |
551 | if (fnic->state != FNIC_IN_FC_MODE && | |
552 | fnic->state != FNIC_IN_ETH_MODE) { | |
553 | skb_queue_head(&fnic->fip_frame_queue, skb); | |
554 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
555 | return; | |
556 | } | |
557 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
558 | eh = (struct ethhdr *)skb->data; | |
559 | if (eh->h_proto == htons(ETH_P_FIP)) { | |
560 | skb_pull(skb, sizeof(*eh)); | |
561 | if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) { | |
562 | dev_kfree_skb(skb); | |
563 | continue; | |
564 | } | |
565 | /* | |
566 | * If there's FLOGI rejects - clear all | |
567 | * fcf's & restart from scratch | |
568 | */ | |
569 | if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) { | |
570 | shost_printk(KERN_INFO, fnic->lport->host, | |
571 | "Trigger a Link down - VLAN Disc\n"); | |
572 | fcoe_ctlr_link_down(&fnic->ctlr); | |
573 | /* start FCoE VLAN discovery */ | |
574 | fnic_fcoe_send_vlan_req(fnic); | |
575 | dev_kfree_skb(skb); | |
576 | continue; | |
577 | } | |
578 | fcoe_ctlr_recv(&fnic->ctlr, skb); | |
579 | continue; | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
78112e55 JE |
584 | /** |
585 | * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. | |
586 | * @fnic: fnic instance. | |
587 | * @skb: Ethernet Frame. | |
588 | */ | |
589 | static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb) | |
5df6d737 AJ |
590 | { |
591 | struct fc_frame *fp; | |
592 | struct ethhdr *eh; | |
5df6d737 AJ |
593 | struct fcoe_hdr *fcoe_hdr; |
594 | struct fcoe_crc_eof *ft; | |
5df6d737 | 595 | |
78112e55 JE |
596 | /* |
597 | * Undo VLAN encapsulation if present. | |
598 | */ | |
5df6d737 | 599 | eh = (struct ethhdr *)skb->data; |
78112e55 JE |
600 | if (eh->h_proto == htons(ETH_P_8021Q)) { |
601 | memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); | |
602 | eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN); | |
603 | skb_reset_mac_header(skb); | |
604 | } | |
605 | if (eh->h_proto == htons(ETH_P_FIP)) { | |
d7fadce3 HP |
606 | if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) { |
607 | printk(KERN_ERR "Dropped FIP frame, as firmware " | |
608 | "uses non-FIP mode, Enable FIP " | |
609 | "using UCSM\n"); | |
610 | goto drop; | |
611 | } | |
d3c995f1 HP |
612 | skb_queue_tail(&fnic->fip_frame_queue, skb); |
613 | queue_work(fnic_fip_queue, &fnic->fip_frame_work); | |
78112e55 JE |
614 | return 1; /* let caller know packet was used */ |
615 | } | |
616 | if (eh->h_proto != htons(ETH_P_FCOE)) | |
617 | goto drop; | |
618 | skb_set_network_header(skb, sizeof(*eh)); | |
619 | skb_pull(skb, sizeof(*eh)); | |
5df6d737 AJ |
620 | |
621 | fcoe_hdr = (struct fcoe_hdr *)skb->data; | |
622 | if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) | |
78112e55 | 623 | goto drop; |
5df6d737 AJ |
624 | |
625 | fp = (struct fc_frame *)skb; | |
626 | fc_frame_init(fp); | |
627 | fr_sof(fp) = fcoe_hdr->fcoe_sof; | |
628 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
78112e55 | 629 | skb_reset_transport_header(skb); |
5df6d737 | 630 | |
78112e55 | 631 | ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); |
5df6d737 | 632 | fr_eof(fp) = ft->fcoe_eof; |
78112e55 | 633 | skb_trim(skb, skb->len - sizeof(*ft)); |
5df6d737 | 634 | return 0; |
78112e55 JE |
635 | drop: |
636 | dev_kfree_skb_irq(skb); | |
637 | return -1; | |
5df6d737 AJ |
638 | } |
639 | ||
78112e55 JE |
640 | /** |
641 | * fnic_update_mac_locked() - set data MAC address and filters. | |
642 | * @fnic: fnic instance. | |
643 | * @new: newly-assigned FCoE MAC address. | |
644 | * | |
645 | * Called with the fnic lock held. | |
646 | */ | |
647 | void fnic_update_mac_locked(struct fnic *fnic, u8 *new) | |
5df6d737 | 648 | { |
78112e55 JE |
649 | u8 *ctl = fnic->ctlr.ctl_src_addr; |
650 | u8 *data = fnic->data_src_addr; | |
5df6d737 | 651 | |
78112e55 JE |
652 | if (is_zero_ether_addr(new)) |
653 | new = ctl; | |
654 | if (!compare_ether_addr(data, new)) | |
655 | return; | |
656 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new); | |
657 | if (!is_zero_ether_addr(data) && compare_ether_addr(data, ctl)) | |
658 | vnic_dev_del_addr(fnic->vdev, data); | |
659 | memcpy(data, new, ETH_ALEN); | |
660 | if (compare_ether_addr(new, ctl)) | |
661 | vnic_dev_add_addr(fnic->vdev, new); | |
662 | } | |
5df6d737 | 663 | |
78112e55 JE |
664 | /** |
665 | * fnic_update_mac() - set data MAC address and filters. | |
666 | * @lport: local port. | |
667 | * @new: newly-assigned FCoE MAC address. | |
668 | */ | |
669 | void fnic_update_mac(struct fc_lport *lport, u8 *new) | |
670 | { | |
671 | struct fnic *fnic = lport_priv(lport); | |
5df6d737 | 672 | |
78112e55 JE |
673 | spin_lock_irq(&fnic->fnic_lock); |
674 | fnic_update_mac_locked(fnic, new); | |
675 | spin_unlock_irq(&fnic->fnic_lock); | |
676 | } | |
5df6d737 | 677 | |
78112e55 JE |
678 | /** |
679 | * fnic_set_port_id() - set the port_ID after successful FLOGI. | |
680 | * @lport: local port. | |
681 | * @port_id: assigned FC_ID. | |
682 | * @fp: received frame containing the FLOGI accept or NULL. | |
683 | * | |
684 | * This is called from libfc when a new FC_ID has been assigned. | |
685 | * This causes us to reset the firmware to FC_MODE and setup the new MAC | |
686 | * address and FC_ID. | |
687 | * | |
688 | * It is also called with FC_ID 0 when we're logged off. | |
689 | * | |
690 | * If the FC_ID is due to point-to-point, fp may be NULL. | |
691 | */ | |
692 | void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) | |
693 | { | |
694 | struct fnic *fnic = lport_priv(lport); | |
695 | u8 *mac; | |
696 | int ret; | |
5df6d737 | 697 | |
78112e55 JE |
698 | FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n", |
699 | port_id, fp); | |
5df6d737 | 700 | |
78112e55 JE |
701 | /* |
702 | * If we're clearing the FC_ID, change to use the ctl_src_addr. | |
703 | * Set ethernet mode to send FLOGI. | |
704 | */ | |
705 | if (!port_id) { | |
706 | fnic_update_mac(lport, fnic->ctlr.ctl_src_addr); | |
707 | fnic_set_eth_mode(fnic); | |
708 | return; | |
709 | } | |
5df6d737 | 710 | |
78112e55 JE |
711 | if (fp) { |
712 | mac = fr_cb(fp)->granted_mac; | |
713 | if (is_zero_ether_addr(mac)) { | |
714 | /* non-FIP - FLOGI already accepted - ignore return */ | |
715 | fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); | |
5df6d737 | 716 | } |
78112e55 JE |
717 | fnic_update_mac(lport, mac); |
718 | } | |
5df6d737 | 719 | |
78112e55 JE |
720 | /* Change state to reflect transition to FC mode */ |
721 | spin_lock_irq(&fnic->fnic_lock); | |
722 | if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE) | |
5df6d737 | 723 | fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; |
78112e55 | 724 | else { |
5df6d737 AJ |
725 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
726 | "Unexpected fnic state %s while" | |
727 | " processing flogi resp\n", | |
728 | fnic_state_to_str(fnic->state)); | |
78112e55 JE |
729 | spin_unlock_irq(&fnic->fnic_lock); |
730 | return; | |
5df6d737 | 731 | } |
78112e55 | 732 | spin_unlock_irq(&fnic->fnic_lock); |
5df6d737 AJ |
733 | |
734 | /* | |
78112e55 JE |
735 | * Send FLOGI registration to firmware to set up FC mode. |
736 | * The new address will be set up when registration completes. | |
5df6d737 | 737 | */ |
78112e55 | 738 | ret = fnic_flogi_reg_handler(fnic, port_id); |
5df6d737 AJ |
739 | |
740 | if (ret < 0) { | |
78112e55 | 741 | spin_lock_irq(&fnic->fnic_lock); |
5df6d737 AJ |
742 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) |
743 | fnic->state = FNIC_IN_ETH_MODE; | |
78112e55 | 744 | spin_unlock_irq(&fnic->fnic_lock); |
5df6d737 | 745 | } |
5df6d737 AJ |
746 | } |
747 | ||
748 | static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc | |
749 | *cq_desc, struct vnic_rq_buf *buf, | |
750 | int skipped __attribute__((unused)), | |
751 | void *opaque) | |
752 | { | |
753 | struct fnic *fnic = vnic_dev_priv(rq->vdev); | |
754 | struct sk_buff *skb; | |
755 | struct fc_frame *fp; | |
756 | unsigned int eth_hdrs_stripped; | |
757 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
758 | u8 fcoe = 0, fcoe_sof, fcoe_eof; | |
759 | u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; | |
760 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
761 | u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc; | |
762 | u8 fcs_ok = 1, packet_error = 0; | |
763 | u16 q_number, completed_index, bytes_written = 0, vlan, checksum; | |
764 | u32 rss_hash; | |
765 | u16 exchange_id, tmpl; | |
766 | u8 sof = 0; | |
767 | u8 eof = 0; | |
768 | u32 fcp_bytes_written = 0; | |
769 | unsigned long flags; | |
770 | ||
771 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, | |
772 | PCI_DMA_FROMDEVICE); | |
773 | skb = buf->os_buf; | |
78112e55 | 774 | fp = (struct fc_frame *)skb; |
5df6d737 AJ |
775 | buf->os_buf = NULL; |
776 | ||
777 | cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); | |
778 | if (type == CQ_DESC_TYPE_RQ_FCP) { | |
779 | cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc, | |
780 | &type, &color, &q_number, &completed_index, | |
781 | &eop, &sop, &fcoe_fc_crc_ok, &exchange_id, | |
782 | &tmpl, &fcp_bytes_written, &sof, &eof, | |
783 | &ingress_port, &packet_error, | |
784 | &fcoe_enc_error, &fcs_ok, &vlan_stripped, | |
785 | &vlan); | |
786 | eth_hdrs_stripped = 1; | |
78112e55 JE |
787 | skb_trim(skb, fcp_bytes_written); |
788 | fr_sof(fp) = sof; | |
789 | fr_eof(fp) = eof; | |
5df6d737 AJ |
790 | |
791 | } else if (type == CQ_DESC_TYPE_RQ_ENET) { | |
792 | cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, | |
793 | &type, &color, &q_number, &completed_index, | |
794 | &ingress_port, &fcoe, &eop, &sop, | |
795 | &rss_type, &csum_not_calc, &rss_hash, | |
796 | &bytes_written, &packet_error, | |
797 | &vlan_stripped, &vlan, &checksum, | |
798 | &fcoe_sof, &fcoe_fc_crc_ok, | |
799 | &fcoe_enc_error, &fcoe_eof, | |
800 | &tcp_udp_csum_ok, &udp, &tcp, | |
801 | &ipv4_csum_ok, &ipv6, &ipv4, | |
802 | &ipv4_fragment, &fcs_ok); | |
803 | eth_hdrs_stripped = 0; | |
78112e55 JE |
804 | skb_trim(skb, bytes_written); |
805 | if (!fcs_ok) { | |
806 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
807 | "fcs error. dropping packet.\n"); | |
808 | goto drop; | |
809 | } | |
810 | if (fnic_import_rq_eth_pkt(fnic, skb)) | |
811 | return; | |
5df6d737 AJ |
812 | |
813 | } else { | |
814 | /* wrong CQ type*/ | |
815 | shost_printk(KERN_ERR, fnic->lport->host, | |
816 | "fnic rq_cmpl wrong cq type x%x\n", type); | |
817 | goto drop; | |
818 | } | |
819 | ||
820 | if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { | |
821 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
822 | "fnic rq_cmpl fcoe x%x fcsok x%x" | |
823 | " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" | |
824 | " x%x\n", | |
825 | fcoe, fcs_ok, packet_error, | |
826 | fcoe_fc_crc_ok, fcoe_enc_error); | |
827 | goto drop; | |
828 | } | |
829 | ||
5df6d737 AJ |
830 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
831 | if (fnic->stop_rx_link_events) { | |
832 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
833 | goto drop; | |
834 | } | |
5df6d737 AJ |
835 | fr_dev(fp) = fnic->lport; |
836 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
837 | ||
838 | skb_queue_tail(&fnic->frame_queue, skb); | |
839 | queue_work(fnic_event_queue, &fnic->frame_work); | |
840 | ||
841 | return; | |
842 | drop: | |
843 | dev_kfree_skb_irq(skb); | |
844 | } | |
845 | ||
846 | static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, | |
847 | struct cq_desc *cq_desc, u8 type, | |
848 | u16 q_number, u16 completed_index, | |
849 | void *opaque) | |
850 | { | |
851 | struct fnic *fnic = vnic_dev_priv(vdev); | |
852 | ||
853 | vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index, | |
854 | VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv, | |
855 | NULL); | |
856 | return 0; | |
857 | } | |
858 | ||
859 | int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) | |
860 | { | |
861 | unsigned int tot_rq_work_done = 0, cur_work_done; | |
862 | unsigned int i; | |
863 | int err; | |
864 | ||
865 | for (i = 0; i < fnic->rq_count; i++) { | |
866 | cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do, | |
867 | fnic_rq_cmpl_handler_cont, | |
868 | NULL); | |
869 | if (cur_work_done) { | |
870 | err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); | |
871 | if (err) | |
872 | shost_printk(KERN_ERR, fnic->lport->host, | |
25985edc | 873 | "fnic_alloc_rq_frame can't alloc" |
5df6d737 AJ |
874 | " frame\n"); |
875 | } | |
876 | tot_rq_work_done += cur_work_done; | |
877 | } | |
878 | ||
879 | return tot_rq_work_done; | |
880 | } | |
881 | ||
882 | /* | |
883 | * This function is called once at init time to allocate and fill RQ | |
884 | * buffers. Subsequently, it is called in the interrupt context after RQ | |
885 | * buffer processing to replenish the buffers in the RQ | |
886 | */ | |
887 | int fnic_alloc_rq_frame(struct vnic_rq *rq) | |
888 | { | |
889 | struct fnic *fnic = vnic_dev_priv(rq->vdev); | |
890 | struct sk_buff *skb; | |
891 | u16 len; | |
892 | dma_addr_t pa; | |
893 | ||
894 | len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; | |
895 | skb = dev_alloc_skb(len); | |
896 | if (!skb) { | |
897 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
898 | "Unable to allocate RQ sk_buff\n"); | |
899 | return -ENOMEM; | |
900 | } | |
901 | skb_reset_mac_header(skb); | |
902 | skb_reset_transport_header(skb); | |
903 | skb_reset_network_header(skb); | |
904 | skb_put(skb, len); | |
905 | pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE); | |
906 | fnic_queue_rq_desc(rq, skb, pa, len); | |
907 | return 0; | |
908 | } | |
909 | ||
910 | void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) | |
911 | { | |
912 | struct fc_frame *fp = buf->os_buf; | |
913 | struct fnic *fnic = vnic_dev_priv(rq->vdev); | |
914 | ||
915 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, | |
916 | PCI_DMA_FROMDEVICE); | |
917 | ||
918 | dev_kfree_skb(fp_skb(fp)); | |
919 | buf->os_buf = NULL; | |
920 | } | |
921 | ||
78112e55 JE |
922 | /** |
923 | * fnic_eth_send() - Send Ethernet frame. | |
924 | * @fip: fcoe_ctlr instance. | |
925 | * @skb: Ethernet Frame, FIP, without VLAN encapsulation. | |
926 | */ | |
927 | void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
5df6d737 | 928 | { |
78112e55 JE |
929 | struct fnic *fnic = fnic_from_ctlr(fip); |
930 | struct vnic_wq *wq = &fnic->wq[0]; | |
931 | dma_addr_t pa; | |
932 | struct ethhdr *eth_hdr; | |
933 | struct vlan_ethhdr *vlan_hdr; | |
934 | unsigned long flags; | |
935 | ||
936 | if (!fnic->vlan_hw_insert) { | |
937 | eth_hdr = (struct ethhdr *)skb_mac_header(skb); | |
938 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, | |
939 | sizeof(*vlan_hdr) - sizeof(*eth_hdr)); | |
940 | memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); | |
941 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); | |
942 | vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; | |
943 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); | |
944 | } | |
945 | ||
946 | pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); | |
947 | ||
948 | spin_lock_irqsave(&fnic->wq_lock[0], flags); | |
949 | if (!vnic_wq_desc_avail(wq)) { | |
950 | pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE); | |
951 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); | |
952 | kfree_skb(skb); | |
953 | return; | |
954 | } | |
955 | ||
956 | fnic_queue_wq_eth_desc(wq, skb, pa, skb->len, | |
c0773b7c HP |
957 | 0 /* hw inserts cos value */, |
958 | fnic->vlan_id, 1); | |
78112e55 | 959 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
5df6d737 AJ |
960 | } |
961 | ||
78112e55 JE |
962 | /* |
963 | * Send FC frame. | |
964 | */ | |
965 | static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) | |
5df6d737 AJ |
966 | { |
967 | struct vnic_wq *wq = &fnic->wq[0]; | |
968 | struct sk_buff *skb; | |
969 | dma_addr_t pa; | |
970 | struct ethhdr *eth_hdr; | |
971 | struct vlan_ethhdr *vlan_hdr; | |
972 | struct fcoe_hdr *fcoe_hdr; | |
973 | struct fc_frame_header *fh; | |
974 | u32 tot_len, eth_hdr_len; | |
975 | int ret = 0; | |
976 | unsigned long flags; | |
977 | ||
978 | fh = fc_frame_header_get(fp); | |
979 | skb = fp_skb(fp); | |
980 | ||
78112e55 JE |
981 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
982 | fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) | |
983 | return 0; | |
984 | ||
5df6d737 AJ |
985 | if (!fnic->vlan_hw_insert) { |
986 | eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); | |
987 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len); | |
988 | eth_hdr = (struct ethhdr *)vlan_hdr; | |
989 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); | |
990 | vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); | |
991 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); | |
992 | fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); | |
993 | } else { | |
994 | eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); | |
995 | eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len); | |
996 | eth_hdr->h_proto = htons(ETH_P_FCOE); | |
997 | fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); | |
998 | } | |
999 | ||
78112e55 | 1000 | if (fnic->ctlr.map_dest) |
5df6d737 | 1001 | fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id); |
78112e55 JE |
1002 | else |
1003 | memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); | |
1004 | memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); | |
5df6d737 AJ |
1005 | |
1006 | tot_len = skb->len; | |
1007 | BUG_ON(tot_len % 4); | |
1008 | ||
1009 | memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); | |
1010 | fcoe_hdr->fcoe_sof = fr_sof(fp); | |
1011 | if (FC_FCOE_VER) | |
1012 | FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); | |
1013 | ||
1014 | pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE); | |
1015 | ||
1016 | spin_lock_irqsave(&fnic->wq_lock[0], flags); | |
1017 | ||
1018 | if (!vnic_wq_desc_avail(wq)) { | |
1019 | pci_unmap_single(fnic->pdev, pa, | |
1020 | tot_len, PCI_DMA_TODEVICE); | |
1021 | ret = -1; | |
1022 | goto fnic_send_frame_end; | |
1023 | } | |
1024 | ||
1025 | fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp), | |
c0773b7c HP |
1026 | 0 /* hw inserts cos value */, |
1027 | fnic->vlan_id, 1, 1, 1); | |
5df6d737 AJ |
1028 | fnic_send_frame_end: |
1029 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); | |
1030 | ||
1031 | if (ret) | |
1032 | dev_kfree_skb_any(fp_skb(fp)); | |
1033 | ||
1034 | return ret; | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * fnic_send | |
1039 | * Routine to send a raw frame | |
1040 | */ | |
1041 | int fnic_send(struct fc_lport *lp, struct fc_frame *fp) | |
1042 | { | |
1043 | struct fnic *fnic = lport_priv(lp); | |
5df6d737 | 1044 | unsigned long flags; |
5df6d737 AJ |
1045 | |
1046 | if (fnic->in_remove) { | |
1047 | dev_kfree_skb(fp_skb(fp)); | |
78112e55 | 1048 | return -1; |
5df6d737 AJ |
1049 | } |
1050 | ||
78112e55 JE |
1051 | /* |
1052 | * Queue frame if in a transitional state. | |
1053 | * This occurs while registering the Port_ID / MAC address after FLOGI. | |
1054 | */ | |
1055 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1056 | if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { | |
1057 | skb_queue_tail(&fnic->tx_queue, fp_skb(fp)); | |
1058 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1059 | return 0; | |
1060 | } | |
1061 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
5df6d737 | 1062 | |
78112e55 JE |
1063 | return fnic_send_frame(fnic, fp); |
1064 | } | |
5df6d737 | 1065 | |
78112e55 JE |
1066 | /** |
1067 | * fnic_flush_tx() - send queued frames. | |
1068 | * @fnic: fnic device | |
1069 | * | |
1070 | * Send frames that were waiting to go out in FC or Ethernet mode. | |
1071 | * Whenever changing modes we purge queued frames, so these frames should | |
1072 | * be queued for the stable mode that we're in, either FC or Ethernet. | |
1073 | * | |
1074 | * Called without fnic_lock held. | |
1075 | */ | |
1076 | void fnic_flush_tx(struct fnic *fnic) | |
1077 | { | |
1078 | struct sk_buff *skb; | |
1079 | struct fc_frame *fp; | |
5df6d737 | 1080 | |
d9e9ab56 | 1081 | while ((skb = skb_dequeue(&fnic->tx_queue))) { |
78112e55 JE |
1082 | fp = (struct fc_frame *)skb; |
1083 | fnic_send_frame(fnic, fp); | |
1084 | } | |
1085 | } | |
5df6d737 | 1086 | |
78112e55 JE |
1087 | /** |
1088 | * fnic_set_eth_mode() - put fnic into ethernet mode. | |
1089 | * @fnic: fnic device | |
1090 | * | |
1091 | * Called without fnic lock held. | |
1092 | */ | |
1093 | static void fnic_set_eth_mode(struct fnic *fnic) | |
1094 | { | |
1095 | unsigned long flags; | |
1096 | enum fnic_state old_state; | |
1097 | int ret; | |
1098 | ||
1099 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1100 | again: | |
5df6d737 AJ |
1101 | old_state = fnic->state; |
1102 | switch (old_state) { | |
1103 | case FNIC_IN_FC_MODE: | |
1104 | case FNIC_IN_ETH_TRANS_FC_MODE: | |
1105 | default: | |
1106 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
5df6d737 AJ |
1107 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
1108 | ||
5df6d737 AJ |
1109 | ret = fnic_fw_reset_handler(fnic); |
1110 | ||
1111 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1112 | if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) | |
1113 | goto again; | |
78112e55 | 1114 | if (ret) |
5df6d737 | 1115 | fnic->state = old_state; |
5df6d737 AJ |
1116 | break; |
1117 | ||
1118 | case FNIC_IN_FC_TRANS_ETH_MODE: | |
5df6d737 | 1119 | case FNIC_IN_ETH_MODE: |
5df6d737 AJ |
1120 | break; |
1121 | } | |
78112e55 | 1122 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
5df6d737 AJ |
1123 | } |
1124 | ||
1125 | static void fnic_wq_complete_frame_send(struct vnic_wq *wq, | |
1126 | struct cq_desc *cq_desc, | |
1127 | struct vnic_wq_buf *buf, void *opaque) | |
1128 | { | |
1129 | struct sk_buff *skb = buf->os_buf; | |
1130 | struct fc_frame *fp = (struct fc_frame *)skb; | |
1131 | struct fnic *fnic = vnic_dev_priv(wq->vdev); | |
1132 | ||
1133 | pci_unmap_single(fnic->pdev, buf->dma_addr, | |
1134 | buf->len, PCI_DMA_TODEVICE); | |
1135 | dev_kfree_skb_irq(fp_skb(fp)); | |
1136 | buf->os_buf = NULL; | |
1137 | } | |
1138 | ||
1139 | static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, | |
1140 | struct cq_desc *cq_desc, u8 type, | |
1141 | u16 q_number, u16 completed_index, | |
1142 | void *opaque) | |
1143 | { | |
1144 | struct fnic *fnic = vnic_dev_priv(vdev); | |
1145 | unsigned long flags; | |
1146 | ||
1147 | spin_lock_irqsave(&fnic->wq_lock[q_number], flags); | |
1148 | vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index, | |
1149 | fnic_wq_complete_frame_send, NULL); | |
1150 | spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags); | |
1151 | ||
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) | |
1156 | { | |
1157 | unsigned int wq_work_done = 0; | |
1158 | unsigned int i; | |
1159 | ||
1160 | for (i = 0; i < fnic->raw_wq_count; i++) { | |
1161 | wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i], | |
1162 | work_to_do, | |
1163 | fnic_wq_cmpl_handler_cont, | |
1164 | NULL); | |
1165 | } | |
1166 | ||
1167 | return wq_work_done; | |
1168 | } | |
1169 | ||
1170 | ||
1171 | void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) | |
1172 | { | |
1173 | struct fc_frame *fp = buf->os_buf; | |
1174 | struct fnic *fnic = vnic_dev_priv(wq->vdev); | |
1175 | ||
1176 | pci_unmap_single(fnic->pdev, buf->dma_addr, | |
1177 | buf->len, PCI_DMA_TODEVICE); | |
1178 | ||
1179 | dev_kfree_skb(fp_skb(fp)); | |
1180 | buf->os_buf = NULL; | |
1181 | } | |
d3c995f1 HP |
1182 | |
1183 | void fnic_fcoe_reset_vlans(struct fnic *fnic) | |
1184 | { | |
1185 | unsigned long flags; | |
1186 | struct fcoe_vlan *vlan; | |
1187 | struct fcoe_vlan *next; | |
1188 | ||
1189 | /* | |
1190 | * indicate a link down to fcoe so that all fcf's are free'd | |
1191 | * might not be required since we did this before sending vlan | |
1192 | * discovery request | |
1193 | */ | |
1194 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
1195 | if (!list_empty(&fnic->vlans)) { | |
1196 | list_for_each_entry_safe(vlan, next, &fnic->vlans, list) { | |
1197 | list_del(&vlan->list); | |
1198 | kfree(vlan); | |
1199 | } | |
1200 | } | |
1201 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1202 | } | |
1203 | ||
1204 | void fnic_handle_fip_timer(struct fnic *fnic) | |
1205 | { | |
1206 | unsigned long flags; | |
1207 | struct fcoe_vlan *vlan; | |
1208 | u64 sol_time; | |
1209 | ||
1210 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1211 | if (fnic->stop_rx_link_events) { | |
1212 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1213 | return; | |
1214 | } | |
1215 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1216 | ||
1217 | if (fnic->ctlr.mode == FIP_ST_NON_FIP) | |
1218 | return; | |
1219 | ||
1220 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
1221 | if (list_empty(&fnic->vlans)) { | |
1222 | /* no vlans available, try again */ | |
1223 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
1224 | "Start VLAN Discovery\n"); | |
1225 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1226 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
1227 | return; | |
1228 | } | |
1229 | ||
1230 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
1231 | shost_printk(KERN_DEBUG, fnic->lport->host, | |
1232 | "fip_timer: vlan %d state %d sol_count %d\n", | |
1233 | vlan->vid, vlan->state, vlan->sol_count); | |
1234 | switch (vlan->state) { | |
1235 | case FIP_VLAN_USED: | |
1236 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
1237 | "FIP VLAN is selected for FC transaction\n"); | |
1238 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1239 | break; | |
1240 | case FIP_VLAN_FAILED: | |
1241 | /* if all vlans are in failed state, restart vlan disc */ | |
1242 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
1243 | "Start VLAN Discovery\n"); | |
1244 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1245 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
1246 | break; | |
1247 | case FIP_VLAN_SENT: | |
1248 | if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) { | |
1249 | /* | |
1250 | * no response on this vlan, remove from the list. | |
1251 | * Try the next vlan | |
1252 | */ | |
1253 | shost_printk(KERN_INFO, fnic->lport->host, | |
1254 | "Dequeue this VLAN ID %d from list\n", | |
1255 | vlan->vid); | |
1256 | list_del(&vlan->list); | |
1257 | kfree(vlan); | |
1258 | vlan = NULL; | |
1259 | if (list_empty(&fnic->vlans)) { | |
1260 | /* we exhausted all vlans, restart vlan disc */ | |
1261 | spin_unlock_irqrestore(&fnic->vlans_lock, | |
1262 | flags); | |
1263 | shost_printk(KERN_INFO, fnic->lport->host, | |
1264 | "fip_timer: vlan list empty, " | |
1265 | "trigger vlan disc\n"); | |
1266 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
1267 | return; | |
1268 | } | |
1269 | /* check the next vlan */ | |
1270 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, | |
1271 | list); | |
1272 | fnic->set_vlan(fnic, vlan->vid); | |
1273 | vlan->state = FIP_VLAN_SENT; /* sent now */ | |
1274 | } | |
1275 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1276 | vlan->sol_count++; | |
1277 | sol_time = jiffies + msecs_to_jiffies | |
1278 | (FCOE_CTLR_START_DELAY); | |
1279 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); | |
1280 | break; | |
1281 | } | |
1282 | } |