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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 | ||
86001f24 | 38 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
d3c995f1 | 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) { | |
abb14148 | 69 | if (!fnic->link_status) { |
5df6d737 AJ |
70 | /* DOWN -> DOWN */ |
71 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
abb14148 HS |
72 | fnic_fc_trace_set_data(fnic->lport->host->host_no, |
73 | FNIC_FC_LE, "Link Status: DOWN->DOWN", | |
74 | strlen("Link Status: DOWN->DOWN")); | |
75 | } else { | |
5df6d737 AJ |
76 | if (old_link_down_cnt != fnic->link_down_cnt) { |
77 | /* UP -> DOWN -> UP */ | |
78 | fnic->lport->host_stats.link_failure_count++; | |
79 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
abb14148 HS |
80 | fnic_fc_trace_set_data( |
81 | fnic->lport->host->host_no, | |
82 | FNIC_FC_LE, | |
83 | "Link Status:UP_DOWN_UP", | |
84 | strlen("Link_Status:UP_DOWN_UP") | |
85 | ); | |
5df6d737 AJ |
86 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
87 | "link down\n"); | |
78112e55 | 88 | fcoe_ctlr_link_down(&fnic->ctlr); |
d3c995f1 HP |
89 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
90 | /* start FCoE VLAN discovery */ | |
abb14148 HS |
91 | fnic_fc_trace_set_data( |
92 | fnic->lport->host->host_no, | |
93 | FNIC_FC_LE, | |
94 | "Link Status: UP_DOWN_UP_VLAN", | |
95 | strlen( | |
96 | "Link Status: UP_DOWN_UP_VLAN") | |
97 | ); | |
d3c995f1 HP |
98 | fnic_fcoe_send_vlan_req(fnic); |
99 | return; | |
100 | } | |
5df6d737 AJ |
101 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
102 | "link up\n"); | |
78112e55 | 103 | fcoe_ctlr_link_up(&fnic->ctlr); |
86001f24 | 104 | } else { |
5df6d737 AJ |
105 | /* UP -> UP */ |
106 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
abb14148 HS |
107 | fnic_fc_trace_set_data( |
108 | fnic->lport->host->host_no, FNIC_FC_LE, | |
109 | "Link Status: UP_UP", | |
110 | strlen("Link Status: UP_UP")); | |
86001f24 | 111 | } |
5df6d737 AJ |
112 | } |
113 | } else if (fnic->link_status) { | |
114 | /* DOWN -> UP */ | |
115 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
d3c995f1 HP |
116 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
117 | /* start FCoE VLAN discovery */ | |
abb14148 HS |
118 | fnic_fc_trace_set_data( |
119 | fnic->lport->host->host_no, | |
120 | FNIC_FC_LE, "Link Status: DOWN_UP_VLAN", | |
121 | strlen("Link Status: DOWN_UP_VLAN")); | |
d3c995f1 HP |
122 | fnic_fcoe_send_vlan_req(fnic); |
123 | return; | |
124 | } | |
5df6d737 | 125 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); |
abb14148 HS |
126 | fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE, |
127 | "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP")); | |
78112e55 | 128 | fcoe_ctlr_link_up(&fnic->ctlr); |
5df6d737 AJ |
129 | } else { |
130 | /* UP -> DOWN */ | |
131 | fnic->lport->host_stats.link_failure_count++; | |
132 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
133 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n"); | |
abb14148 HS |
134 | fnic_fc_trace_set_data( |
135 | fnic->lport->host->host_no, FNIC_FC_LE, | |
136 | "Link Status: UP_DOWN", | |
137 | strlen("Link Status: UP_DOWN")); | |
0ee7b871 HS |
138 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
139 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
140 | "deleting fip-timer during link-down\n"); | |
141 | del_timer_sync(&fnic->fip_timer); | |
142 | } | |
78112e55 | 143 | fcoe_ctlr_link_down(&fnic->ctlr); |
5df6d737 AJ |
144 | } |
145 | ||
146 | } | |
147 | ||
148 | /* | |
149 | * This function passes incoming fabric frames to libFC | |
150 | */ | |
151 | void fnic_handle_frame(struct work_struct *work) | |
152 | { | |
153 | struct fnic *fnic = container_of(work, struct fnic, frame_work); | |
154 | struct fc_lport *lp = fnic->lport; | |
155 | unsigned long flags; | |
156 | struct sk_buff *skb; | |
157 | struct fc_frame *fp; | |
158 | ||
159 | while ((skb = skb_dequeue(&fnic->frame_queue))) { | |
160 | ||
161 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
162 | if (fnic->stop_rx_link_events) { | |
163 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
164 | dev_kfree_skb(skb); | |
165 | return; | |
166 | } | |
167 | fp = (struct fc_frame *)skb; | |
78112e55 JE |
168 | |
169 | /* | |
170 | * If we're in a transitional state, just re-queue and return. | |
171 | * The queue will be serviced when we get to a stable state. | |
172 | */ | |
173 | if (fnic->state != FNIC_IN_FC_MODE && | |
174 | fnic->state != FNIC_IN_ETH_MODE) { | |
175 | skb_queue_head(&fnic->frame_queue, skb); | |
176 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
177 | return; | |
5df6d737 AJ |
178 | } |
179 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
180 | ||
52ff878c | 181 | fc_exch_recv(lp, fp); |
5df6d737 | 182 | } |
5df6d737 AJ |
183 | } |
184 | ||
d3c995f1 HP |
185 | void fnic_fcoe_evlist_free(struct fnic *fnic) |
186 | { | |
187 | struct fnic_event *fevt = NULL; | |
188 | struct fnic_event *next = NULL; | |
189 | unsigned long flags; | |
190 | ||
191 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
192 | if (list_empty(&fnic->evlist)) { | |
193 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
194 | return; | |
195 | } | |
196 | ||
197 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { | |
198 | list_del(&fevt->list); | |
199 | kfree(fevt); | |
200 | } | |
201 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
202 | } | |
203 | ||
204 | void fnic_handle_event(struct work_struct *work) | |
205 | { | |
206 | struct fnic *fnic = container_of(work, struct fnic, event_work); | |
207 | struct fnic_event *fevt = NULL; | |
208 | struct fnic_event *next = NULL; | |
209 | unsigned long flags; | |
210 | ||
211 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
212 | if (list_empty(&fnic->evlist)) { | |
213 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
214 | return; | |
215 | } | |
216 | ||
217 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { | |
218 | if (fnic->stop_rx_link_events) { | |
219 | list_del(&fevt->list); | |
220 | kfree(fevt); | |
221 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
222 | return; | |
223 | } | |
224 | /* | |
225 | * If we're in a transitional state, just re-queue and return. | |
226 | * The queue will be serviced when we get to a stable state. | |
227 | */ | |
228 | if (fnic->state != FNIC_IN_FC_MODE && | |
229 | fnic->state != FNIC_IN_ETH_MODE) { | |
230 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
231 | return; | |
232 | } | |
233 | ||
234 | list_del(&fevt->list); | |
235 | switch (fevt->event) { | |
236 | case FNIC_EVT_START_VLAN_DISC: | |
237 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
238 | fnic_fcoe_send_vlan_req(fnic); | |
239 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
240 | break; | |
241 | case FNIC_EVT_START_FCF_DISC: | |
242 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
243 | "Start FCF Discovery\n"); | |
244 | fnic_fcoe_start_fcf_disc(fnic); | |
245 | break; | |
246 | default: | |
247 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
248 | "Unknown event 0x%x\n", fevt->event); | |
249 | break; | |
250 | } | |
251 | kfree(fevt); | |
252 | } | |
253 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
254 | } | |
255 | ||
256 | /** | |
257 | * Check if the Received FIP FLOGI frame is rejected | |
258 | * @fip: The FCoE controller that received the frame | |
259 | * @skb: The received FIP frame | |
260 | * | |
261 | * Returns non-zero if the frame is rejected with unsupported cmd with | |
262 | * insufficient resource els explanation. | |
263 | */ | |
264 | static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip, | |
265 | struct sk_buff *skb) | |
266 | { | |
267 | struct fc_lport *lport = fip->lp; | |
268 | struct fip_header *fiph; | |
269 | struct fc_frame_header *fh = NULL; | |
270 | struct fip_desc *desc; | |
271 | struct fip_encaps *els; | |
272 | enum fip_desc_type els_dtype = 0; | |
273 | u16 op; | |
274 | u8 els_op; | |
275 | u8 sub; | |
276 | ||
277 | size_t els_len = 0; | |
278 | size_t rlen; | |
279 | size_t dlen = 0; | |
280 | ||
281 | if (skb_linearize(skb)) | |
282 | return 0; | |
283 | ||
284 | if (skb->len < sizeof(*fiph)) | |
285 | return 0; | |
286 | ||
287 | fiph = (struct fip_header *)skb->data; | |
288 | op = ntohs(fiph->fip_op); | |
289 | sub = fiph->fip_subcode; | |
290 | ||
291 | if (op != FIP_OP_LS) | |
292 | return 0; | |
293 | ||
294 | if (sub != FIP_SC_REP) | |
295 | return 0; | |
296 | ||
297 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
298 | if (rlen + sizeof(*fiph) > skb->len) | |
299 | return 0; | |
300 | ||
301 | desc = (struct fip_desc *)(fiph + 1); | |
302 | dlen = desc->fip_dlen * FIP_BPW; | |
303 | ||
304 | if (desc->fip_dtype == FIP_DT_FLOGI) { | |
305 | ||
d3c995f1 HP |
306 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) |
307 | return 0; | |
308 | ||
309 | els_len = dlen - sizeof(*els); | |
310 | els = (struct fip_encaps *)desc; | |
311 | fh = (struct fc_frame_header *)(els + 1); | |
312 | els_dtype = desc->fip_dtype; | |
313 | ||
314 | if (!fh) | |
315 | return 0; | |
316 | ||
317 | /* | |
318 | * ELS command code, reason and explanation should be = Reject, | |
319 | * unsupported command and insufficient resource | |
320 | */ | |
321 | els_op = *(u8 *)(fh + 1); | |
322 | if (els_op == ELS_LS_RJT) { | |
323 | shost_printk(KERN_INFO, lport->host, | |
324 | "Flogi Request Rejected by Switch\n"); | |
325 | return 1; | |
326 | } | |
327 | shost_printk(KERN_INFO, lport->host, | |
328 | "Flogi Request Accepted by Switch\n"); | |
329 | } | |
330 | return 0; | |
331 | } | |
332 | ||
333 | static void fnic_fcoe_send_vlan_req(struct fnic *fnic) | |
334 | { | |
335 | struct fcoe_ctlr *fip = &fnic->ctlr; | |
67125b02 | 336 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
d3c995f1 HP |
337 | struct sk_buff *skb; |
338 | char *eth_fr; | |
339 | int fr_len; | |
340 | struct fip_vlan *vlan; | |
341 | u64 vlan_tov; | |
342 | ||
343 | fnic_fcoe_reset_vlans(fnic); | |
344 | fnic->set_vlan(fnic, 0); | |
345 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, | |
346 | "Sending VLAN request...\n"); | |
347 | skb = dev_alloc_skb(sizeof(struct fip_vlan)); | |
348 | if (!skb) | |
349 | return; | |
350 | ||
351 | fr_len = sizeof(*vlan); | |
352 | eth_fr = (char *)skb->data; | |
353 | vlan = (struct fip_vlan *)eth_fr; | |
354 | ||
355 | memset(vlan, 0, sizeof(*vlan)); | |
356 | memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
357 | memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN); | |
358 | vlan->eth.h_proto = htons(ETH_P_FIP); | |
359 | ||
360 | vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
361 | vlan->fip.fip_op = htons(FIP_OP_VLAN); | |
362 | vlan->fip.fip_subcode = FIP_SC_VL_REQ; | |
363 | vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW); | |
364 | ||
365 | vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
366 | vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW; | |
367 | memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
368 | ||
369 | vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
370 | vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW; | |
371 | put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn); | |
67125b02 | 372 | atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs); |
d3c995f1 HP |
373 | |
374 | skb_put(skb, sizeof(*vlan)); | |
375 | skb->protocol = htons(ETH_P_FIP); | |
376 | skb_reset_mac_header(skb); | |
377 | skb_reset_network_header(skb); | |
378 | fip->send(fip, skb); | |
379 | ||
380 | /* set a timer so that we can retry if there no response */ | |
381 | vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV); | |
382 | mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov)); | |
383 | } | |
384 | ||
385 | static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb) | |
386 | { | |
387 | struct fcoe_ctlr *fip = &fnic->ctlr; | |
388 | struct fip_header *fiph; | |
389 | struct fip_desc *desc; | |
67125b02 | 390 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
d3c995f1 HP |
391 | u16 vid; |
392 | size_t rlen; | |
393 | size_t dlen; | |
394 | struct fcoe_vlan *vlan; | |
395 | u64 sol_time; | |
396 | unsigned long flags; | |
397 | ||
398 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, | |
399 | "Received VLAN response...\n"); | |
400 | ||
401 | fiph = (struct fip_header *) skb->data; | |
402 | ||
403 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, | |
404 | "Received VLAN response... OP 0x%x SUB_OP 0x%x\n", | |
405 | ntohs(fiph->fip_op), fiph->fip_subcode); | |
406 | ||
407 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
408 | fnic_fcoe_reset_vlans(fnic); | |
409 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
410 | desc = (struct fip_desc *)(fiph + 1); | |
411 | while (rlen > 0) { | |
412 | dlen = desc->fip_dlen * FIP_BPW; | |
413 | switch (desc->fip_dtype) { | |
414 | case FIP_DT_VLAN: | |
415 | vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan); | |
416 | shost_printk(KERN_INFO, fnic->lport->host, | |
417 | "process_vlan_resp: FIP VLAN %d\n", vid); | |
418 | vlan = kmalloc(sizeof(*vlan), | |
419 | GFP_ATOMIC); | |
420 | if (!vlan) { | |
421 | /* retry from timer */ | |
422 | spin_unlock_irqrestore(&fnic->vlans_lock, | |
423 | flags); | |
424 | goto out; | |
425 | } | |
426 | memset(vlan, 0, sizeof(struct fcoe_vlan)); | |
427 | vlan->vid = vid & 0x0fff; | |
428 | vlan->state = FIP_VLAN_AVAIL; | |
429 | list_add_tail(&vlan->list, &fnic->vlans); | |
430 | break; | |
431 | } | |
432 | desc = (struct fip_desc *)((char *)desc + dlen); | |
433 | rlen -= dlen; | |
434 | } | |
435 | ||
436 | /* any VLAN descriptors present ? */ | |
437 | if (list_empty(&fnic->vlans)) { | |
438 | /* retry from timer */ | |
67125b02 | 439 | atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID); |
d3c995f1 HP |
440 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
441 | "No VLAN descriptors in FIP VLAN response\n"); | |
442 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
443 | goto out; | |
444 | } | |
445 | ||
446 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
447 | fnic->set_vlan(fnic, vlan->vid); | |
448 | vlan->state = FIP_VLAN_SENT; /* sent now */ | |
449 | vlan->sol_count++; | |
450 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
451 | ||
452 | /* start the solicitation */ | |
453 | fcoe_ctlr_link_up(fip); | |
454 | ||
455 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); | |
456 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); | |
457 | out: | |
458 | return; | |
459 | } | |
460 | ||
461 | static void fnic_fcoe_start_fcf_disc(struct fnic *fnic) | |
462 | { | |
463 | unsigned long flags; | |
464 | struct fcoe_vlan *vlan; | |
465 | u64 sol_time; | |
466 | ||
467 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
468 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
469 | fnic->set_vlan(fnic, vlan->vid); | |
470 | vlan->state = FIP_VLAN_SENT; /* sent now */ | |
471 | vlan->sol_count = 1; | |
472 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
473 | ||
474 | /* start the solicitation */ | |
475 | fcoe_ctlr_link_up(&fnic->ctlr); | |
476 | ||
477 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); | |
478 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); | |
479 | } | |
480 | ||
481 | static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag) | |
482 | { | |
483 | unsigned long flags; | |
484 | struct fcoe_vlan *fvlan; | |
485 | ||
486 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
487 | if (list_empty(&fnic->vlans)) { | |
488 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
489 | return -EINVAL; | |
490 | } | |
491 | ||
492 | fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
493 | if (fvlan->state == FIP_VLAN_USED) { | |
494 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | if (fvlan->state == FIP_VLAN_SENT) { | |
499 | fvlan->state = FIP_VLAN_USED; | |
500 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
501 | return 0; | |
502 | } | |
503 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
504 | return -EINVAL; | |
505 | } | |
506 | ||
507 | static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev) | |
508 | { | |
509 | struct fnic_event *fevt; | |
510 | unsigned long flags; | |
511 | ||
512 | fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC); | |
513 | if (!fevt) | |
514 | return; | |
515 | ||
516 | fevt->fnic = fnic; | |
517 | fevt->event = ev; | |
518 | ||
519 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
520 | list_add_tail(&fevt->list, &fnic->evlist); | |
521 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
522 | ||
523 | schedule_work(&fnic->event_work); | |
524 | } | |
525 | ||
526 | static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb) | |
527 | { | |
528 | struct fip_header *fiph; | |
529 | int ret = 1; | |
530 | u16 op; | |
531 | u8 sub; | |
532 | ||
533 | if (!skb || !(skb->data)) | |
534 | return -1; | |
535 | ||
536 | if (skb_linearize(skb)) | |
537 | goto drop; | |
538 | ||
539 | fiph = (struct fip_header *)skb->data; | |
540 | op = ntohs(fiph->fip_op); | |
541 | sub = fiph->fip_subcode; | |
542 | ||
543 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) | |
544 | goto drop; | |
545 | ||
546 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
547 | goto drop; | |
548 | ||
549 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) { | |
550 | if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags))) | |
551 | goto drop; | |
552 | /* pass it on to fcoe */ | |
553 | ret = 1; | |
554 | } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) { | |
555 | /* set the vlan as used */ | |
556 | fnic_fcoe_process_vlan_resp(fnic, skb); | |
557 | ret = 0; | |
558 | } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) { | |
559 | /* received CVL request, restart vlan disc */ | |
560 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
561 | /* pass it on to fcoe */ | |
562 | ret = 1; | |
563 | } | |
564 | drop: | |
565 | return ret; | |
566 | } | |
567 | ||
568 | void fnic_handle_fip_frame(struct work_struct *work) | |
569 | { | |
570 | struct fnic *fnic = container_of(work, struct fnic, fip_frame_work); | |
67125b02 | 571 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
d3c995f1 HP |
572 | unsigned long flags; |
573 | struct sk_buff *skb; | |
574 | struct ethhdr *eh; | |
575 | ||
576 | while ((skb = skb_dequeue(&fnic->fip_frame_queue))) { | |
577 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
578 | if (fnic->stop_rx_link_events) { | |
579 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
580 | dev_kfree_skb(skb); | |
581 | return; | |
582 | } | |
583 | /* | |
584 | * If we're in a transitional state, just re-queue and return. | |
585 | * The queue will be serviced when we get to a stable state. | |
586 | */ | |
587 | if (fnic->state != FNIC_IN_FC_MODE && | |
588 | fnic->state != FNIC_IN_ETH_MODE) { | |
589 | skb_queue_head(&fnic->fip_frame_queue, skb); | |
590 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
591 | return; | |
592 | } | |
593 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
594 | eh = (struct ethhdr *)skb->data; | |
595 | if (eh->h_proto == htons(ETH_P_FIP)) { | |
596 | skb_pull(skb, sizeof(*eh)); | |
597 | if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) { | |
598 | dev_kfree_skb(skb); | |
599 | continue; | |
600 | } | |
601 | /* | |
602 | * If there's FLOGI rejects - clear all | |
603 | * fcf's & restart from scratch | |
604 | */ | |
605 | if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) { | |
67125b02 HP |
606 | atomic64_inc( |
607 | &fnic_stats->vlan_stats.flogi_rejects); | |
d3c995f1 HP |
608 | shost_printk(KERN_INFO, fnic->lport->host, |
609 | "Trigger a Link down - VLAN Disc\n"); | |
610 | fcoe_ctlr_link_down(&fnic->ctlr); | |
611 | /* start FCoE VLAN discovery */ | |
612 | fnic_fcoe_send_vlan_req(fnic); | |
613 | dev_kfree_skb(skb); | |
614 | continue; | |
615 | } | |
616 | fcoe_ctlr_recv(&fnic->ctlr, skb); | |
617 | continue; | |
618 | } | |
619 | } | |
620 | } | |
621 | ||
78112e55 JE |
622 | /** |
623 | * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. | |
624 | * @fnic: fnic instance. | |
625 | * @skb: Ethernet Frame. | |
626 | */ | |
627 | static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb) | |
5df6d737 AJ |
628 | { |
629 | struct fc_frame *fp; | |
630 | struct ethhdr *eh; | |
5df6d737 AJ |
631 | struct fcoe_hdr *fcoe_hdr; |
632 | struct fcoe_crc_eof *ft; | |
5df6d737 | 633 | |
78112e55 JE |
634 | /* |
635 | * Undo VLAN encapsulation if present. | |
636 | */ | |
5df6d737 | 637 | eh = (struct ethhdr *)skb->data; |
78112e55 JE |
638 | if (eh->h_proto == htons(ETH_P_8021Q)) { |
639 | memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); | |
640 | eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN); | |
641 | skb_reset_mac_header(skb); | |
642 | } | |
643 | if (eh->h_proto == htons(ETH_P_FIP)) { | |
d7fadce3 HP |
644 | if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) { |
645 | printk(KERN_ERR "Dropped FIP frame, as firmware " | |
646 | "uses non-FIP mode, Enable FIP " | |
647 | "using UCSM\n"); | |
648 | goto drop; | |
649 | } | |
abb14148 HS |
650 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
651 | FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) { | |
652 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); | |
653 | } | |
d3c995f1 HP |
654 | skb_queue_tail(&fnic->fip_frame_queue, skb); |
655 | queue_work(fnic_fip_queue, &fnic->fip_frame_work); | |
78112e55 JE |
656 | return 1; /* let caller know packet was used */ |
657 | } | |
658 | if (eh->h_proto != htons(ETH_P_FCOE)) | |
659 | goto drop; | |
660 | skb_set_network_header(skb, sizeof(*eh)); | |
661 | skb_pull(skb, sizeof(*eh)); | |
5df6d737 AJ |
662 | |
663 | fcoe_hdr = (struct fcoe_hdr *)skb->data; | |
664 | if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) | |
78112e55 | 665 | goto drop; |
5df6d737 AJ |
666 | |
667 | fp = (struct fc_frame *)skb; | |
668 | fc_frame_init(fp); | |
669 | fr_sof(fp) = fcoe_hdr->fcoe_sof; | |
670 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
78112e55 | 671 | skb_reset_transport_header(skb); |
5df6d737 | 672 | |
78112e55 | 673 | ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); |
5df6d737 | 674 | fr_eof(fp) = ft->fcoe_eof; |
78112e55 | 675 | skb_trim(skb, skb->len - sizeof(*ft)); |
5df6d737 | 676 | return 0; |
78112e55 JE |
677 | drop: |
678 | dev_kfree_skb_irq(skb); | |
679 | return -1; | |
5df6d737 AJ |
680 | } |
681 | ||
78112e55 JE |
682 | /** |
683 | * fnic_update_mac_locked() - set data MAC address and filters. | |
684 | * @fnic: fnic instance. | |
685 | * @new: newly-assigned FCoE MAC address. | |
686 | * | |
687 | * Called with the fnic lock held. | |
688 | */ | |
689 | void fnic_update_mac_locked(struct fnic *fnic, u8 *new) | |
5df6d737 | 690 | { |
78112e55 JE |
691 | u8 *ctl = fnic->ctlr.ctl_src_addr; |
692 | u8 *data = fnic->data_src_addr; | |
5df6d737 | 693 | |
78112e55 JE |
694 | if (is_zero_ether_addr(new)) |
695 | new = ctl; | |
6942df7f | 696 | if (ether_addr_equal(data, new)) |
78112e55 JE |
697 | return; |
698 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new); | |
6942df7f | 699 | if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl)) |
78112e55 JE |
700 | vnic_dev_del_addr(fnic->vdev, data); |
701 | memcpy(data, new, ETH_ALEN); | |
6942df7f | 702 | if (!ether_addr_equal(new, ctl)) |
78112e55 JE |
703 | vnic_dev_add_addr(fnic->vdev, new); |
704 | } | |
5df6d737 | 705 | |
78112e55 JE |
706 | /** |
707 | * fnic_update_mac() - set data MAC address and filters. | |
708 | * @lport: local port. | |
709 | * @new: newly-assigned FCoE MAC address. | |
710 | */ | |
711 | void fnic_update_mac(struct fc_lport *lport, u8 *new) | |
712 | { | |
713 | struct fnic *fnic = lport_priv(lport); | |
5df6d737 | 714 | |
78112e55 JE |
715 | spin_lock_irq(&fnic->fnic_lock); |
716 | fnic_update_mac_locked(fnic, new); | |
717 | spin_unlock_irq(&fnic->fnic_lock); | |
718 | } | |
5df6d737 | 719 | |
78112e55 JE |
720 | /** |
721 | * fnic_set_port_id() - set the port_ID after successful FLOGI. | |
722 | * @lport: local port. | |
723 | * @port_id: assigned FC_ID. | |
724 | * @fp: received frame containing the FLOGI accept or NULL. | |
725 | * | |
726 | * This is called from libfc when a new FC_ID has been assigned. | |
727 | * This causes us to reset the firmware to FC_MODE and setup the new MAC | |
728 | * address and FC_ID. | |
729 | * | |
730 | * It is also called with FC_ID 0 when we're logged off. | |
731 | * | |
732 | * If the FC_ID is due to point-to-point, fp may be NULL. | |
733 | */ | |
734 | void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) | |
735 | { | |
736 | struct fnic *fnic = lport_priv(lport); | |
737 | u8 *mac; | |
738 | int ret; | |
5df6d737 | 739 | |
78112e55 JE |
740 | FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n", |
741 | port_id, fp); | |
5df6d737 | 742 | |
78112e55 JE |
743 | /* |
744 | * If we're clearing the FC_ID, change to use the ctl_src_addr. | |
745 | * Set ethernet mode to send FLOGI. | |
746 | */ | |
747 | if (!port_id) { | |
748 | fnic_update_mac(lport, fnic->ctlr.ctl_src_addr); | |
749 | fnic_set_eth_mode(fnic); | |
750 | return; | |
751 | } | |
5df6d737 | 752 | |
78112e55 JE |
753 | if (fp) { |
754 | mac = fr_cb(fp)->granted_mac; | |
755 | if (is_zero_ether_addr(mac)) { | |
756 | /* non-FIP - FLOGI already accepted - ignore return */ | |
757 | fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); | |
5df6d737 | 758 | } |
78112e55 JE |
759 | fnic_update_mac(lport, mac); |
760 | } | |
5df6d737 | 761 | |
78112e55 JE |
762 | /* Change state to reflect transition to FC mode */ |
763 | spin_lock_irq(&fnic->fnic_lock); | |
764 | if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE) | |
5df6d737 | 765 | fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; |
78112e55 | 766 | else { |
5df6d737 AJ |
767 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
768 | "Unexpected fnic state %s while" | |
769 | " processing flogi resp\n", | |
770 | fnic_state_to_str(fnic->state)); | |
78112e55 JE |
771 | spin_unlock_irq(&fnic->fnic_lock); |
772 | return; | |
5df6d737 | 773 | } |
78112e55 | 774 | spin_unlock_irq(&fnic->fnic_lock); |
5df6d737 AJ |
775 | |
776 | /* | |
78112e55 JE |
777 | * Send FLOGI registration to firmware to set up FC mode. |
778 | * The new address will be set up when registration completes. | |
5df6d737 | 779 | */ |
78112e55 | 780 | ret = fnic_flogi_reg_handler(fnic, port_id); |
5df6d737 AJ |
781 | |
782 | if (ret < 0) { | |
78112e55 | 783 | spin_lock_irq(&fnic->fnic_lock); |
5df6d737 AJ |
784 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) |
785 | fnic->state = FNIC_IN_ETH_MODE; | |
78112e55 | 786 | spin_unlock_irq(&fnic->fnic_lock); |
5df6d737 | 787 | } |
5df6d737 AJ |
788 | } |
789 | ||
790 | static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc | |
791 | *cq_desc, struct vnic_rq_buf *buf, | |
792 | int skipped __attribute__((unused)), | |
793 | void *opaque) | |
794 | { | |
795 | struct fnic *fnic = vnic_dev_priv(rq->vdev); | |
796 | struct sk_buff *skb; | |
797 | struct fc_frame *fp; | |
67125b02 | 798 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
5df6d737 AJ |
799 | unsigned int eth_hdrs_stripped; |
800 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
801 | u8 fcoe = 0, fcoe_sof, fcoe_eof; | |
802 | u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; | |
803 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
804 | u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc; | |
805 | u8 fcs_ok = 1, packet_error = 0; | |
806 | u16 q_number, completed_index, bytes_written = 0, vlan, checksum; | |
807 | u32 rss_hash; | |
808 | u16 exchange_id, tmpl; | |
809 | u8 sof = 0; | |
810 | u8 eof = 0; | |
811 | u32 fcp_bytes_written = 0; | |
812 | unsigned long flags; | |
813 | ||
814 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, | |
815 | PCI_DMA_FROMDEVICE); | |
816 | skb = buf->os_buf; | |
78112e55 | 817 | fp = (struct fc_frame *)skb; |
5df6d737 AJ |
818 | buf->os_buf = NULL; |
819 | ||
820 | cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); | |
821 | if (type == CQ_DESC_TYPE_RQ_FCP) { | |
822 | cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc, | |
823 | &type, &color, &q_number, &completed_index, | |
824 | &eop, &sop, &fcoe_fc_crc_ok, &exchange_id, | |
825 | &tmpl, &fcp_bytes_written, &sof, &eof, | |
826 | &ingress_port, &packet_error, | |
827 | &fcoe_enc_error, &fcs_ok, &vlan_stripped, | |
828 | &vlan); | |
829 | eth_hdrs_stripped = 1; | |
78112e55 JE |
830 | skb_trim(skb, fcp_bytes_written); |
831 | fr_sof(fp) = sof; | |
832 | fr_eof(fp) = eof; | |
5df6d737 AJ |
833 | |
834 | } else if (type == CQ_DESC_TYPE_RQ_ENET) { | |
835 | cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, | |
836 | &type, &color, &q_number, &completed_index, | |
837 | &ingress_port, &fcoe, &eop, &sop, | |
838 | &rss_type, &csum_not_calc, &rss_hash, | |
839 | &bytes_written, &packet_error, | |
840 | &vlan_stripped, &vlan, &checksum, | |
841 | &fcoe_sof, &fcoe_fc_crc_ok, | |
842 | &fcoe_enc_error, &fcoe_eof, | |
843 | &tcp_udp_csum_ok, &udp, &tcp, | |
844 | &ipv4_csum_ok, &ipv6, &ipv4, | |
845 | &ipv4_fragment, &fcs_ok); | |
846 | eth_hdrs_stripped = 0; | |
78112e55 JE |
847 | skb_trim(skb, bytes_written); |
848 | if (!fcs_ok) { | |
67125b02 | 849 | atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
78112e55 JE |
850 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
851 | "fcs error. dropping packet.\n"); | |
852 | goto drop; | |
853 | } | |
854 | if (fnic_import_rq_eth_pkt(fnic, skb)) | |
855 | return; | |
5df6d737 AJ |
856 | |
857 | } else { | |
858 | /* wrong CQ type*/ | |
859 | shost_printk(KERN_ERR, fnic->lport->host, | |
860 | "fnic rq_cmpl wrong cq type x%x\n", type); | |
861 | goto drop; | |
862 | } | |
863 | ||
864 | if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { | |
67125b02 | 865 | atomic64_inc(&fnic_stats->misc_stats.frame_errors); |
5df6d737 AJ |
866 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
867 | "fnic rq_cmpl fcoe x%x fcsok x%x" | |
868 | " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" | |
869 | " x%x\n", | |
870 | fcoe, fcs_ok, packet_error, | |
871 | fcoe_fc_crc_ok, fcoe_enc_error); | |
872 | goto drop; | |
873 | } | |
874 | ||
5df6d737 AJ |
875 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
876 | if (fnic->stop_rx_link_events) { | |
877 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
878 | goto drop; | |
879 | } | |
5df6d737 AJ |
880 | fr_dev(fp) = fnic->lport; |
881 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
abb14148 HS |
882 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV, |
883 | (char *)skb->data, skb->len)) != 0) { | |
884 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); | |
885 | } | |
5df6d737 AJ |
886 | |
887 | skb_queue_tail(&fnic->frame_queue, skb); | |
888 | queue_work(fnic_event_queue, &fnic->frame_work); | |
889 | ||
890 | return; | |
891 | drop: | |
892 | dev_kfree_skb_irq(skb); | |
893 | } | |
894 | ||
895 | static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, | |
896 | struct cq_desc *cq_desc, u8 type, | |
897 | u16 q_number, u16 completed_index, | |
898 | void *opaque) | |
899 | { | |
900 | struct fnic *fnic = vnic_dev_priv(vdev); | |
901 | ||
902 | vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index, | |
903 | VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv, | |
904 | NULL); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) | |
909 | { | |
910 | unsigned int tot_rq_work_done = 0, cur_work_done; | |
911 | unsigned int i; | |
912 | int err; | |
913 | ||
914 | for (i = 0; i < fnic->rq_count; i++) { | |
915 | cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do, | |
916 | fnic_rq_cmpl_handler_cont, | |
917 | NULL); | |
918 | if (cur_work_done) { | |
919 | err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); | |
920 | if (err) | |
921 | shost_printk(KERN_ERR, fnic->lport->host, | |
25985edc | 922 | "fnic_alloc_rq_frame can't alloc" |
5df6d737 AJ |
923 | " frame\n"); |
924 | } | |
925 | tot_rq_work_done += cur_work_done; | |
926 | } | |
927 | ||
928 | return tot_rq_work_done; | |
929 | } | |
930 | ||
931 | /* | |
932 | * This function is called once at init time to allocate and fill RQ | |
933 | * buffers. Subsequently, it is called in the interrupt context after RQ | |
934 | * buffer processing to replenish the buffers in the RQ | |
935 | */ | |
936 | int fnic_alloc_rq_frame(struct vnic_rq *rq) | |
937 | { | |
938 | struct fnic *fnic = vnic_dev_priv(rq->vdev); | |
939 | struct sk_buff *skb; | |
940 | u16 len; | |
941 | dma_addr_t pa; | |
fd6ddfa4 | 942 | int r; |
5df6d737 AJ |
943 | |
944 | len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; | |
945 | skb = dev_alloc_skb(len); | |
946 | if (!skb) { | |
947 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
948 | "Unable to allocate RQ sk_buff\n"); | |
949 | return -ENOMEM; | |
950 | } | |
951 | skb_reset_mac_header(skb); | |
952 | skb_reset_transport_header(skb); | |
953 | skb_reset_network_header(skb); | |
954 | skb_put(skb, len); | |
955 | pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE); | |
fd6ddfa4 ML |
956 | |
957 | r = pci_dma_mapping_error(fnic->pdev, pa); | |
958 | if (r) { | |
959 | printk(KERN_ERR "PCI mapping failed with error %d\n", r); | |
960 | goto free_skb; | |
961 | } | |
962 | ||
5df6d737 AJ |
963 | fnic_queue_rq_desc(rq, skb, pa, len); |
964 | return 0; | |
fd6ddfa4 ML |
965 | |
966 | free_skb: | |
967 | kfree_skb(skb); | |
968 | return r; | |
5df6d737 AJ |
969 | } |
970 | ||
971 | void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) | |
972 | { | |
973 | struct fc_frame *fp = buf->os_buf; | |
974 | struct fnic *fnic = vnic_dev_priv(rq->vdev); | |
975 | ||
976 | pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, | |
977 | PCI_DMA_FROMDEVICE); | |
978 | ||
979 | dev_kfree_skb(fp_skb(fp)); | |
980 | buf->os_buf = NULL; | |
981 | } | |
982 | ||
78112e55 JE |
983 | /** |
984 | * fnic_eth_send() - Send Ethernet frame. | |
985 | * @fip: fcoe_ctlr instance. | |
986 | * @skb: Ethernet Frame, FIP, without VLAN encapsulation. | |
987 | */ | |
988 | void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
5df6d737 | 989 | { |
78112e55 JE |
990 | struct fnic *fnic = fnic_from_ctlr(fip); |
991 | struct vnic_wq *wq = &fnic->wq[0]; | |
992 | dma_addr_t pa; | |
993 | struct ethhdr *eth_hdr; | |
994 | struct vlan_ethhdr *vlan_hdr; | |
995 | unsigned long flags; | |
fd6ddfa4 | 996 | int r; |
78112e55 JE |
997 | |
998 | if (!fnic->vlan_hw_insert) { | |
999 | eth_hdr = (struct ethhdr *)skb_mac_header(skb); | |
1000 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, | |
1001 | sizeof(*vlan_hdr) - sizeof(*eth_hdr)); | |
1002 | memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); | |
1003 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); | |
1004 | vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; | |
1005 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); | |
abb14148 HS |
1006 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, |
1007 | FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) { | |
1008 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); | |
1009 | } | |
1010 | } else { | |
1011 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, | |
1012 | FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) { | |
1013 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); | |
1014 | } | |
78112e55 JE |
1015 | } |
1016 | ||
1017 | pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); | |
1018 | ||
fd6ddfa4 ML |
1019 | r = pci_dma_mapping_error(fnic->pdev, pa); |
1020 | if (r) { | |
1021 | printk(KERN_ERR "PCI mapping failed with error %d\n", r); | |
1022 | goto free_skb; | |
78112e55 JE |
1023 | } |
1024 | ||
fd6ddfa4 ML |
1025 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
1026 | if (!vnic_wq_desc_avail(wq)) | |
1027 | goto irq_restore; | |
1028 | ||
78112e55 | 1029 | fnic_queue_wq_eth_desc(wq, skb, pa, skb->len, |
c0773b7c HP |
1030 | 0 /* hw inserts cos value */, |
1031 | fnic->vlan_id, 1); | |
78112e55 | 1032 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
fd6ddfa4 ML |
1033 | return; |
1034 | ||
1035 | irq_restore: | |
1036 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); | |
1037 | pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE); | |
1038 | free_skb: | |
1039 | kfree_skb(skb); | |
5df6d737 AJ |
1040 | } |
1041 | ||
78112e55 JE |
1042 | /* |
1043 | * Send FC frame. | |
1044 | */ | |
1045 | static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) | |
5df6d737 AJ |
1046 | { |
1047 | struct vnic_wq *wq = &fnic->wq[0]; | |
1048 | struct sk_buff *skb; | |
1049 | dma_addr_t pa; | |
1050 | struct ethhdr *eth_hdr; | |
1051 | struct vlan_ethhdr *vlan_hdr; | |
1052 | struct fcoe_hdr *fcoe_hdr; | |
1053 | struct fc_frame_header *fh; | |
1054 | u32 tot_len, eth_hdr_len; | |
1055 | int ret = 0; | |
1056 | unsigned long flags; | |
1057 | ||
1058 | fh = fc_frame_header_get(fp); | |
1059 | skb = fp_skb(fp); | |
1060 | ||
78112e55 JE |
1061 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
1062 | fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) | |
1063 | return 0; | |
1064 | ||
5df6d737 AJ |
1065 | if (!fnic->vlan_hw_insert) { |
1066 | eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); | |
1067 | vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len); | |
1068 | eth_hdr = (struct ethhdr *)vlan_hdr; | |
1069 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); | |
1070 | vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); | |
1071 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); | |
1072 | fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); | |
1073 | } else { | |
1074 | eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); | |
1075 | eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len); | |
1076 | eth_hdr->h_proto = htons(ETH_P_FCOE); | |
1077 | fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); | |
1078 | } | |
1079 | ||
78112e55 | 1080 | if (fnic->ctlr.map_dest) |
5df6d737 | 1081 | fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id); |
78112e55 JE |
1082 | else |
1083 | memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); | |
1084 | memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); | |
5df6d737 AJ |
1085 | |
1086 | tot_len = skb->len; | |
1087 | BUG_ON(tot_len % 4); | |
1088 | ||
1089 | memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); | |
1090 | fcoe_hdr->fcoe_sof = fr_sof(fp); | |
1091 | if (FC_FCOE_VER) | |
1092 | FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); | |
1093 | ||
1094 | pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE); | |
1095 | ||
fd6ddfa4 ML |
1096 | ret = pci_dma_mapping_error(fnic->pdev, pa); |
1097 | if (ret) { | |
1098 | printk(KERN_ERR "DMA map failed with error %d\n", ret); | |
1099 | goto free_skb_on_err; | |
1100 | } | |
1101 | ||
abb14148 HS |
1102 | if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND, |
1103 | (char *)eth_hdr, tot_len)) != 0) { | |
1104 | printk(KERN_ERR "fnic ctlr frame trace error!!!"); | |
1105 | } | |
1106 | ||
5df6d737 AJ |
1107 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
1108 | ||
1109 | if (!vnic_wq_desc_avail(wq)) { | |
1110 | pci_unmap_single(fnic->pdev, pa, | |
1111 | tot_len, PCI_DMA_TODEVICE); | |
1112 | ret = -1; | |
fd6ddfa4 | 1113 | goto irq_restore; |
5df6d737 AJ |
1114 | } |
1115 | ||
1116 | fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp), | |
c0773b7c HP |
1117 | 0 /* hw inserts cos value */, |
1118 | fnic->vlan_id, 1, 1, 1); | |
fd6ddfa4 ML |
1119 | |
1120 | irq_restore: | |
5df6d737 AJ |
1121 | spin_unlock_irqrestore(&fnic->wq_lock[0], flags); |
1122 | ||
fd6ddfa4 | 1123 | free_skb_on_err: |
5df6d737 AJ |
1124 | if (ret) |
1125 | dev_kfree_skb_any(fp_skb(fp)); | |
1126 | ||
1127 | return ret; | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * fnic_send | |
1132 | * Routine to send a raw frame | |
1133 | */ | |
1134 | int fnic_send(struct fc_lport *lp, struct fc_frame *fp) | |
1135 | { | |
1136 | struct fnic *fnic = lport_priv(lp); | |
5df6d737 | 1137 | unsigned long flags; |
5df6d737 AJ |
1138 | |
1139 | if (fnic->in_remove) { | |
1140 | dev_kfree_skb(fp_skb(fp)); | |
78112e55 | 1141 | return -1; |
5df6d737 AJ |
1142 | } |
1143 | ||
78112e55 JE |
1144 | /* |
1145 | * Queue frame if in a transitional state. | |
1146 | * This occurs while registering the Port_ID / MAC address after FLOGI. | |
1147 | */ | |
1148 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1149 | if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { | |
1150 | skb_queue_tail(&fnic->tx_queue, fp_skb(fp)); | |
1151 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1152 | return 0; | |
1153 | } | |
1154 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
5df6d737 | 1155 | |
78112e55 JE |
1156 | return fnic_send_frame(fnic, fp); |
1157 | } | |
5df6d737 | 1158 | |
78112e55 JE |
1159 | /** |
1160 | * fnic_flush_tx() - send queued frames. | |
1161 | * @fnic: fnic device | |
1162 | * | |
1163 | * Send frames that were waiting to go out in FC or Ethernet mode. | |
1164 | * Whenever changing modes we purge queued frames, so these frames should | |
1165 | * be queued for the stable mode that we're in, either FC or Ethernet. | |
1166 | * | |
1167 | * Called without fnic_lock held. | |
1168 | */ | |
1169 | void fnic_flush_tx(struct fnic *fnic) | |
1170 | { | |
1171 | struct sk_buff *skb; | |
1172 | struct fc_frame *fp; | |
5df6d737 | 1173 | |
d9e9ab56 | 1174 | while ((skb = skb_dequeue(&fnic->tx_queue))) { |
78112e55 JE |
1175 | fp = (struct fc_frame *)skb; |
1176 | fnic_send_frame(fnic, fp); | |
1177 | } | |
1178 | } | |
5df6d737 | 1179 | |
78112e55 JE |
1180 | /** |
1181 | * fnic_set_eth_mode() - put fnic into ethernet mode. | |
1182 | * @fnic: fnic device | |
1183 | * | |
1184 | * Called without fnic lock held. | |
1185 | */ | |
1186 | static void fnic_set_eth_mode(struct fnic *fnic) | |
1187 | { | |
1188 | unsigned long flags; | |
1189 | enum fnic_state old_state; | |
1190 | int ret; | |
1191 | ||
1192 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1193 | again: | |
5df6d737 AJ |
1194 | old_state = fnic->state; |
1195 | switch (old_state) { | |
1196 | case FNIC_IN_FC_MODE: | |
1197 | case FNIC_IN_ETH_TRANS_FC_MODE: | |
1198 | default: | |
1199 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; | |
5df6d737 AJ |
1200 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
1201 | ||
5df6d737 AJ |
1202 | ret = fnic_fw_reset_handler(fnic); |
1203 | ||
1204 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1205 | if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) | |
1206 | goto again; | |
78112e55 | 1207 | if (ret) |
5df6d737 | 1208 | fnic->state = old_state; |
5df6d737 AJ |
1209 | break; |
1210 | ||
1211 | case FNIC_IN_FC_TRANS_ETH_MODE: | |
5df6d737 | 1212 | case FNIC_IN_ETH_MODE: |
5df6d737 AJ |
1213 | break; |
1214 | } | |
78112e55 | 1215 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); |
5df6d737 AJ |
1216 | } |
1217 | ||
1218 | static void fnic_wq_complete_frame_send(struct vnic_wq *wq, | |
1219 | struct cq_desc *cq_desc, | |
1220 | struct vnic_wq_buf *buf, void *opaque) | |
1221 | { | |
1222 | struct sk_buff *skb = buf->os_buf; | |
1223 | struct fc_frame *fp = (struct fc_frame *)skb; | |
1224 | struct fnic *fnic = vnic_dev_priv(wq->vdev); | |
1225 | ||
1226 | pci_unmap_single(fnic->pdev, buf->dma_addr, | |
1227 | buf->len, PCI_DMA_TODEVICE); | |
1228 | dev_kfree_skb_irq(fp_skb(fp)); | |
1229 | buf->os_buf = NULL; | |
1230 | } | |
1231 | ||
1232 | static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, | |
1233 | struct cq_desc *cq_desc, u8 type, | |
1234 | u16 q_number, u16 completed_index, | |
1235 | void *opaque) | |
1236 | { | |
1237 | struct fnic *fnic = vnic_dev_priv(vdev); | |
1238 | unsigned long flags; | |
1239 | ||
1240 | spin_lock_irqsave(&fnic->wq_lock[q_number], flags); | |
1241 | vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index, | |
1242 | fnic_wq_complete_frame_send, NULL); | |
1243 | spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags); | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) | |
1249 | { | |
1250 | unsigned int wq_work_done = 0; | |
1251 | unsigned int i; | |
1252 | ||
1253 | for (i = 0; i < fnic->raw_wq_count; i++) { | |
1254 | wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i], | |
1255 | work_to_do, | |
1256 | fnic_wq_cmpl_handler_cont, | |
1257 | NULL); | |
1258 | } | |
1259 | ||
1260 | return wq_work_done; | |
1261 | } | |
1262 | ||
1263 | ||
1264 | void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) | |
1265 | { | |
1266 | struct fc_frame *fp = buf->os_buf; | |
1267 | struct fnic *fnic = vnic_dev_priv(wq->vdev); | |
1268 | ||
1269 | pci_unmap_single(fnic->pdev, buf->dma_addr, | |
1270 | buf->len, PCI_DMA_TODEVICE); | |
1271 | ||
1272 | dev_kfree_skb(fp_skb(fp)); | |
1273 | buf->os_buf = NULL; | |
1274 | } | |
d3c995f1 HP |
1275 | |
1276 | void fnic_fcoe_reset_vlans(struct fnic *fnic) | |
1277 | { | |
1278 | unsigned long flags; | |
1279 | struct fcoe_vlan *vlan; | |
1280 | struct fcoe_vlan *next; | |
1281 | ||
1282 | /* | |
1283 | * indicate a link down to fcoe so that all fcf's are free'd | |
1284 | * might not be required since we did this before sending vlan | |
1285 | * discovery request | |
1286 | */ | |
1287 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
1288 | if (!list_empty(&fnic->vlans)) { | |
1289 | list_for_each_entry_safe(vlan, next, &fnic->vlans, list) { | |
1290 | list_del(&vlan->list); | |
1291 | kfree(vlan); | |
1292 | } | |
1293 | } | |
1294 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1295 | } | |
1296 | ||
1297 | void fnic_handle_fip_timer(struct fnic *fnic) | |
1298 | { | |
1299 | unsigned long flags; | |
1300 | struct fcoe_vlan *vlan; | |
67125b02 | 1301 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
d3c995f1 HP |
1302 | u64 sol_time; |
1303 | ||
1304 | spin_lock_irqsave(&fnic->fnic_lock, flags); | |
1305 | if (fnic->stop_rx_link_events) { | |
1306 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1307 | return; | |
1308 | } | |
1309 | spin_unlock_irqrestore(&fnic->fnic_lock, flags); | |
1310 | ||
1311 | if (fnic->ctlr.mode == FIP_ST_NON_FIP) | |
1312 | return; | |
1313 | ||
1314 | spin_lock_irqsave(&fnic->vlans_lock, flags); | |
1315 | if (list_empty(&fnic->vlans)) { | |
1316 | /* no vlans available, try again */ | |
1317 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
1318 | "Start VLAN Discovery\n"); | |
1319 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1320 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
1321 | return; | |
1322 | } | |
1323 | ||
1324 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); | |
1325 | shost_printk(KERN_DEBUG, fnic->lport->host, | |
1326 | "fip_timer: vlan %d state %d sol_count %d\n", | |
1327 | vlan->vid, vlan->state, vlan->sol_count); | |
1328 | switch (vlan->state) { | |
1329 | case FIP_VLAN_USED: | |
1330 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
1331 | "FIP VLAN is selected for FC transaction\n"); | |
1332 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1333 | break; | |
1334 | case FIP_VLAN_FAILED: | |
1335 | /* if all vlans are in failed state, restart vlan disc */ | |
1336 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, | |
1337 | "Start VLAN Discovery\n"); | |
1338 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
1339 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
1340 | break; | |
1341 | case FIP_VLAN_SENT: | |
1342 | if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) { | |
1343 | /* | |
1344 | * no response on this vlan, remove from the list. | |
1345 | * Try the next vlan | |
1346 | */ | |
1347 | shost_printk(KERN_INFO, fnic->lport->host, | |
1348 | "Dequeue this VLAN ID %d from list\n", | |
1349 | vlan->vid); | |
1350 | list_del(&vlan->list); | |
1351 | kfree(vlan); | |
1352 | vlan = NULL; | |
1353 | if (list_empty(&fnic->vlans)) { | |
1354 | /* we exhausted all vlans, restart vlan disc */ | |
1355 | spin_unlock_irqrestore(&fnic->vlans_lock, | |
1356 | flags); | |
1357 | shost_printk(KERN_INFO, fnic->lport->host, | |
1358 | "fip_timer: vlan list empty, " | |
1359 | "trigger vlan disc\n"); | |
1360 | fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC); | |
1361 | return; | |
1362 | } | |
1363 | /* check the next vlan */ | |
1364 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, | |
1365 | list); | |
1366 | fnic->set_vlan(fnic, vlan->vid); | |
1367 | vlan->state = FIP_VLAN_SENT; /* sent now */ | |
1368 | } | |
1369 | spin_unlock_irqrestore(&fnic->vlans_lock, flags); | |
67125b02 | 1370 | atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count); |
d3c995f1 HP |
1371 | vlan->sol_count++; |
1372 | sol_time = jiffies + msecs_to_jiffies | |
1373 | (FCOE_CTLR_START_DELAY); | |
1374 | mod_timer(&fnic->fip_timer, round_jiffies(sol_time)); | |
1375 | break; | |
1376 | } | |
1377 | } |