1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright 2008 Cisco Systems, Inc. All rights reserved. |
4 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
5 | */ |
6 | #include <linux/errno.h> |
7 | #include <linux/pci.h> |
8 | #include <linux/slab.h> |
9 | #include <linux/skbuff.h> |
10 | #include <linux/interrupt.h> |
11 | #include <linux/spinlock.h> |
12 | #include <linux/if_ether.h> |
13 | #include <linux/if_vlan.h> |
14 | #include <linux/workqueue.h> |
15 | #include <scsi/fc/fc_fip.h> |
16 | #include <scsi/fc/fc_els.h> |
17 | #include <scsi/fc/fc_fcoe.h> |
18 | #include <scsi/fc_frame.h> |
19 | #include <scsi/libfc.h> |
20 | #include "fnic_io.h" |
21 | #include "fnic.h" |
22 | #include "fnic_fip.h" |
23 | #include "cq_enet_desc.h" |
24 | #include "cq_exch_desc.h" |
25 | |
26 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
27 | struct workqueue_struct *fnic_fip_queue; |
28 | struct workqueue_struct *fnic_event_queue; |
29 | |
30 | static void fnic_set_eth_mode(struct fnic *); |
31 | static void fnic_fcoe_send_vlan_req(struct fnic *fnic); |
32 | static void fnic_fcoe_start_fcf_disc(struct fnic *fnic); |
33 | static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *); |
34 | static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag); |
35 | static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb); |
36 | |
37 | void fnic_handle_link(struct work_struct *work) |
38 | { |
39 | struct fnic *fnic = container_of(work, struct fnic, link_work); |
40 | unsigned long flags; |
41 | int old_link_status; |
42 | u32 old_link_down_cnt; |
43 | u64 old_port_speed, new_port_speed; |
44 | |
45 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
46 | |
47 | fnic->link_events = 1; /* less work to just set everytime*/ |
48 | |
49 | if (fnic->stop_rx_link_events) { |
50 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
51 | return; |
52 | } |
53 | |
54 | old_link_down_cnt = fnic->link_down_cnt; |
55 | old_link_status = fnic->link_status; |
56 | old_port_speed = atomic64_read( |
57 | v: &fnic->fnic_stats.misc_stats.current_port_speed); |
58 | |
59 | fnic->link_status = vnic_dev_link_status(vdev: fnic->vdev); |
60 | fnic->link_down_cnt = vnic_dev_link_down_cnt(vdev: fnic->vdev); |
61 | |
62 | new_port_speed = vnic_dev_port_speed(vdev: fnic->vdev); |
63 | atomic64_set(v: &fnic->fnic_stats.misc_stats.current_port_speed, |
64 | i: new_port_speed); |
65 | if (old_port_speed != new_port_speed) |
66 | FNIC_MAIN_DBG(KERN_INFO, fnic->lport->host, |
67 | "Current vnic speed set to : %llu\n" , |
68 | new_port_speed); |
69 | |
70 | switch (vnic_dev_port_speed(vdev: fnic->vdev)) { |
71 | case DCEM_PORTSPEED_10G: |
72 | fc_host_speed(fnic->lport->host) = FC_PORTSPEED_10GBIT; |
73 | fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT; |
74 | break; |
75 | case DCEM_PORTSPEED_20G: |
76 | fc_host_speed(fnic->lport->host) = FC_PORTSPEED_20GBIT; |
77 | fnic->lport->link_supported_speeds = FC_PORTSPEED_20GBIT; |
78 | break; |
79 | case DCEM_PORTSPEED_25G: |
80 | fc_host_speed(fnic->lport->host) = FC_PORTSPEED_25GBIT; |
81 | fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT; |
82 | break; |
83 | case DCEM_PORTSPEED_40G: |
84 | case DCEM_PORTSPEED_4x10G: |
85 | fc_host_speed(fnic->lport->host) = FC_PORTSPEED_40GBIT; |
86 | fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT; |
87 | break; |
88 | case DCEM_PORTSPEED_100G: |
89 | fc_host_speed(fnic->lport->host) = FC_PORTSPEED_100GBIT; |
90 | fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT; |
91 | break; |
92 | default: |
93 | fc_host_speed(fnic->lport->host) = FC_PORTSPEED_UNKNOWN; |
94 | fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN; |
95 | break; |
96 | } |
97 | |
98 | if (old_link_status == fnic->link_status) { |
99 | if (!fnic->link_status) { |
100 | /* DOWN -> DOWN */ |
101 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
102 | fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, |
103 | FNIC_FC_LE, frame: "Link Status: DOWN->DOWN" , |
104 | strlen("Link Status: DOWN->DOWN" )); |
105 | } else { |
106 | if (old_link_down_cnt != fnic->link_down_cnt) { |
107 | /* UP -> DOWN -> UP */ |
108 | fnic->lport->host_stats.link_failure_count++; |
109 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
110 | fnic_fc_trace_set_data( |
111 | host_no: fnic->lport->host->host_no, |
112 | FNIC_FC_LE, |
113 | frame: "Link Status:UP_DOWN_UP" , |
114 | strlen("Link_Status:UP_DOWN_UP" ) |
115 | ); |
116 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
117 | "link down\n" ); |
118 | fcoe_ctlr_link_down(&fnic->ctlr); |
119 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
120 | /* start FCoE VLAN discovery */ |
121 | fnic_fc_trace_set_data( |
122 | host_no: fnic->lport->host->host_no, |
123 | FNIC_FC_LE, |
124 | frame: "Link Status: UP_DOWN_UP_VLAN" , |
125 | strlen( |
126 | "Link Status: UP_DOWN_UP_VLAN" ) |
127 | ); |
128 | fnic_fcoe_send_vlan_req(fnic); |
129 | return; |
130 | } |
131 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
132 | "link up\n" ); |
133 | fcoe_ctlr_link_up(&fnic->ctlr); |
134 | } else { |
135 | /* UP -> UP */ |
136 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
137 | fnic_fc_trace_set_data( |
138 | host_no: fnic->lport->host->host_no, FNIC_FC_LE, |
139 | frame: "Link Status: UP_UP" , |
140 | strlen("Link Status: UP_UP" )); |
141 | } |
142 | } |
143 | } else if (fnic->link_status) { |
144 | /* DOWN -> UP */ |
145 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
146 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
147 | /* start FCoE VLAN discovery */ |
148 | fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, |
149 | FNIC_FC_LE, frame: "Link Status: DOWN_UP_VLAN" , |
150 | strlen("Link Status: DOWN_UP_VLAN" )); |
151 | fnic_fcoe_send_vlan_req(fnic); |
152 | |
153 | return; |
154 | } |
155 | |
156 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n" ); |
157 | fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, FNIC_FC_LE, |
158 | frame: "Link Status: DOWN_UP" , strlen("Link Status: DOWN_UP" )); |
159 | fcoe_ctlr_link_up(&fnic->ctlr); |
160 | } else { |
161 | /* UP -> DOWN */ |
162 | fnic->lport->host_stats.link_failure_count++; |
163 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
164 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n" ); |
165 | fnic_fc_trace_set_data( |
166 | host_no: fnic->lport->host->host_no, FNIC_FC_LE, |
167 | frame: "Link Status: UP_DOWN" , |
168 | strlen("Link Status: UP_DOWN" )); |
169 | if (fnic->config.flags & VFCF_FIP_CAPABLE) { |
170 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
171 | "deleting fip-timer during link-down\n" ); |
172 | del_timer_sync(timer: &fnic->fip_timer); |
173 | } |
174 | fcoe_ctlr_link_down(&fnic->ctlr); |
175 | } |
176 | |
177 | } |
178 | |
179 | /* |
180 | * This function passes incoming fabric frames to libFC |
181 | */ |
182 | void fnic_handle_frame(struct work_struct *work) |
183 | { |
184 | struct fnic *fnic = container_of(work, struct fnic, frame_work); |
185 | struct fc_lport *lp = fnic->lport; |
186 | unsigned long flags; |
187 | struct sk_buff *skb; |
188 | struct fc_frame *fp; |
189 | |
190 | while ((skb = skb_dequeue(list: &fnic->frame_queue))) { |
191 | |
192 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
193 | if (fnic->stop_rx_link_events) { |
194 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
195 | dev_kfree_skb(skb); |
196 | return; |
197 | } |
198 | fp = (struct fc_frame *)skb; |
199 | |
200 | /* |
201 | * If we're in a transitional state, just re-queue and return. |
202 | * The queue will be serviced when we get to a stable state. |
203 | */ |
204 | if (fnic->state != FNIC_IN_FC_MODE && |
205 | fnic->state != FNIC_IN_ETH_MODE) { |
206 | skb_queue_head(list: &fnic->frame_queue, newsk: skb); |
207 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
208 | return; |
209 | } |
210 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
211 | |
212 | fc_exch_recv(lp, fp); |
213 | } |
214 | } |
215 | |
216 | void fnic_fcoe_evlist_free(struct fnic *fnic) |
217 | { |
218 | struct fnic_event *fevt = NULL; |
219 | struct fnic_event *next = NULL; |
220 | unsigned long flags; |
221 | |
222 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
223 | if (list_empty(head: &fnic->evlist)) { |
224 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
225 | return; |
226 | } |
227 | |
228 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
229 | list_del(entry: &fevt->list); |
230 | kfree(objp: fevt); |
231 | } |
232 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
233 | } |
234 | |
235 | void fnic_handle_event(struct work_struct *work) |
236 | { |
237 | struct fnic *fnic = container_of(work, struct fnic, event_work); |
238 | struct fnic_event *fevt = NULL; |
239 | struct fnic_event *next = NULL; |
240 | unsigned long flags; |
241 | |
242 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
243 | if (list_empty(head: &fnic->evlist)) { |
244 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
245 | return; |
246 | } |
247 | |
248 | list_for_each_entry_safe(fevt, next, &fnic->evlist, list) { |
249 | if (fnic->stop_rx_link_events) { |
250 | list_del(entry: &fevt->list); |
251 | kfree(objp: fevt); |
252 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
253 | return; |
254 | } |
255 | /* |
256 | * If we're in a transitional state, just re-queue and return. |
257 | * The queue will be serviced when we get to a stable state. |
258 | */ |
259 | if (fnic->state != FNIC_IN_FC_MODE && |
260 | fnic->state != FNIC_IN_ETH_MODE) { |
261 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
262 | return; |
263 | } |
264 | |
265 | list_del(entry: &fevt->list); |
266 | switch (fevt->event) { |
267 | case FNIC_EVT_START_VLAN_DISC: |
268 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
269 | fnic_fcoe_send_vlan_req(fnic); |
270 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
271 | break; |
272 | case FNIC_EVT_START_FCF_DISC: |
273 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
274 | "Start FCF Discovery\n" ); |
275 | fnic_fcoe_start_fcf_disc(fnic); |
276 | break; |
277 | default: |
278 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
279 | "Unknown event 0x%x\n" , fevt->event); |
280 | break; |
281 | } |
282 | kfree(objp: fevt); |
283 | } |
284 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
285 | } |
286 | |
287 | /** |
288 | * is_fnic_fip_flogi_reject() - Check if the Received FIP FLOGI frame is rejected |
289 | * @fip: The FCoE controller that received the frame |
290 | * @skb: The received FIP frame |
291 | * |
292 | * Returns non-zero if the frame is rejected with unsupported cmd with |
293 | * insufficient resource els explanation. |
294 | */ |
295 | static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip, |
296 | struct sk_buff *skb) |
297 | { |
298 | struct fc_lport *lport = fip->lp; |
299 | struct fip_header *fiph; |
300 | struct fc_frame_header *fh = NULL; |
301 | struct fip_desc *desc; |
302 | struct fip_encaps *els; |
303 | u16 op; |
304 | u8 els_op; |
305 | u8 sub; |
306 | |
307 | size_t rlen; |
308 | size_t dlen = 0; |
309 | |
310 | if (skb_linearize(skb)) |
311 | return 0; |
312 | |
313 | if (skb->len < sizeof(*fiph)) |
314 | return 0; |
315 | |
316 | fiph = (struct fip_header *)skb->data; |
317 | op = ntohs(fiph->fip_op); |
318 | sub = fiph->fip_subcode; |
319 | |
320 | if (op != FIP_OP_LS) |
321 | return 0; |
322 | |
323 | if (sub != FIP_SC_REP) |
324 | return 0; |
325 | |
326 | rlen = ntohs(fiph->fip_dl_len) * 4; |
327 | if (rlen + sizeof(*fiph) > skb->len) |
328 | return 0; |
329 | |
330 | desc = (struct fip_desc *)(fiph + 1); |
331 | dlen = desc->fip_dlen * FIP_BPW; |
332 | |
333 | if (desc->fip_dtype == FIP_DT_FLOGI) { |
334 | |
335 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) |
336 | return 0; |
337 | |
338 | els = (struct fip_encaps *)desc; |
339 | fh = (struct fc_frame_header *)(els + 1); |
340 | |
341 | if (!fh) |
342 | return 0; |
343 | |
344 | /* |
345 | * ELS command code, reason and explanation should be = Reject, |
346 | * unsupported command and insufficient resource |
347 | */ |
348 | els_op = *(u8 *)(fh + 1); |
349 | if (els_op == ELS_LS_RJT) { |
350 | shost_printk(KERN_INFO, lport->host, |
351 | "Flogi Request Rejected by Switch\n" ); |
352 | return 1; |
353 | } |
354 | shost_printk(KERN_INFO, lport->host, |
355 | "Flogi Request Accepted by Switch\n" ); |
356 | } |
357 | return 0; |
358 | } |
359 | |
360 | static void fnic_fcoe_send_vlan_req(struct fnic *fnic) |
361 | { |
362 | struct fcoe_ctlr *fip = &fnic->ctlr; |
363 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
364 | struct sk_buff *skb; |
365 | char *eth_fr; |
366 | struct fip_vlan *vlan; |
367 | u64 vlan_tov; |
368 | |
369 | fnic_fcoe_reset_vlans(fnic); |
370 | fnic->set_vlan(fnic, 0); |
371 | |
372 | if (printk_ratelimit()) |
373 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
374 | "Sending VLAN request...\n" ); |
375 | |
376 | skb = dev_alloc_skb(length: sizeof(struct fip_vlan)); |
377 | if (!skb) |
378 | return; |
379 | |
380 | eth_fr = (char *)skb->data; |
381 | vlan = (struct fip_vlan *)eth_fr; |
382 | |
383 | memset(vlan, 0, sizeof(*vlan)); |
384 | memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
385 | memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN); |
386 | vlan->eth.h_proto = htons(ETH_P_FIP); |
387 | |
388 | vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); |
389 | vlan->fip.fip_op = htons(FIP_OP_VLAN); |
390 | vlan->fip.fip_subcode = FIP_SC_VL_REQ; |
391 | vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW); |
392 | |
393 | vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; |
394 | vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW; |
395 | memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); |
396 | |
397 | vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; |
398 | vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW; |
399 | put_unaligned_be64(val: fip->lp->wwnn, p: &vlan->desc.wwnn.fd_wwn); |
400 | atomic64_inc(v: &fnic_stats->vlan_stats.vlan_disc_reqs); |
401 | |
402 | skb_put(skb, len: sizeof(*vlan)); |
403 | skb->protocol = htons(ETH_P_FIP); |
404 | skb_reset_mac_header(skb); |
405 | skb_reset_network_header(skb); |
406 | fip->send(fip, skb); |
407 | |
408 | /* set a timer so that we can retry if there no response */ |
409 | vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV); |
410 | mod_timer(timer: &fnic->fip_timer, expires: round_jiffies(j: vlan_tov)); |
411 | } |
412 | |
413 | static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb) |
414 | { |
415 | struct fcoe_ctlr *fip = &fnic->ctlr; |
416 | struct fip_header *fiph; |
417 | struct fip_desc *desc; |
418 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
419 | u16 vid; |
420 | size_t rlen; |
421 | size_t dlen; |
422 | struct fcoe_vlan *vlan; |
423 | u64 sol_time; |
424 | unsigned long flags; |
425 | |
426 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
427 | "Received VLAN response...\n" ); |
428 | |
429 | fiph = (struct fip_header *) skb->data; |
430 | |
431 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
432 | "Received VLAN response... OP 0x%x SUB_OP 0x%x\n" , |
433 | ntohs(fiph->fip_op), fiph->fip_subcode); |
434 | |
435 | rlen = ntohs(fiph->fip_dl_len) * 4; |
436 | fnic_fcoe_reset_vlans(fnic); |
437 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
438 | desc = (struct fip_desc *)(fiph + 1); |
439 | while (rlen > 0) { |
440 | dlen = desc->fip_dlen * FIP_BPW; |
441 | switch (desc->fip_dtype) { |
442 | case FIP_DT_VLAN: |
443 | vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan); |
444 | shost_printk(KERN_INFO, fnic->lport->host, |
445 | "process_vlan_resp: FIP VLAN %d\n" , vid); |
446 | vlan = kzalloc(size: sizeof(*vlan), GFP_ATOMIC); |
447 | if (!vlan) { |
448 | /* retry from timer */ |
449 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, |
450 | flags); |
451 | goto out; |
452 | } |
453 | vlan->vid = vid & 0x0fff; |
454 | vlan->state = FIP_VLAN_AVAIL; |
455 | list_add_tail(new: &vlan->list, head: &fnic->vlans); |
456 | break; |
457 | } |
458 | desc = (struct fip_desc *)((char *)desc + dlen); |
459 | rlen -= dlen; |
460 | } |
461 | |
462 | /* any VLAN descriptors present ? */ |
463 | if (list_empty(head: &fnic->vlans)) { |
464 | /* retry from timer */ |
465 | atomic64_inc(v: &fnic_stats->vlan_stats.resp_withno_vlanID); |
466 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
467 | "No VLAN descriptors in FIP VLAN response\n" ); |
468 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
469 | goto out; |
470 | } |
471 | |
472 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
473 | fnic->set_vlan(fnic, vlan->vid); |
474 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
475 | vlan->sol_count++; |
476 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
477 | |
478 | /* start the solicitation */ |
479 | fcoe_ctlr_link_up(fip); |
480 | |
481 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
482 | mod_timer(timer: &fnic->fip_timer, expires: round_jiffies(j: sol_time)); |
483 | out: |
484 | return; |
485 | } |
486 | |
487 | static void fnic_fcoe_start_fcf_disc(struct fnic *fnic) |
488 | { |
489 | unsigned long flags; |
490 | struct fcoe_vlan *vlan; |
491 | u64 sol_time; |
492 | |
493 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
494 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
495 | fnic->set_vlan(fnic, vlan->vid); |
496 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
497 | vlan->sol_count = 1; |
498 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
499 | |
500 | /* start the solicitation */ |
501 | fcoe_ctlr_link_up(&fnic->ctlr); |
502 | |
503 | sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
504 | mod_timer(timer: &fnic->fip_timer, expires: round_jiffies(j: sol_time)); |
505 | } |
506 | |
507 | static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag) |
508 | { |
509 | unsigned long flags; |
510 | struct fcoe_vlan *fvlan; |
511 | |
512 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
513 | if (list_empty(head: &fnic->vlans)) { |
514 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
515 | return -EINVAL; |
516 | } |
517 | |
518 | fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
519 | if (fvlan->state == FIP_VLAN_USED) { |
520 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
521 | return 0; |
522 | } |
523 | |
524 | if (fvlan->state == FIP_VLAN_SENT) { |
525 | fvlan->state = FIP_VLAN_USED; |
526 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
527 | return 0; |
528 | } |
529 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
530 | return -EINVAL; |
531 | } |
532 | |
533 | static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev) |
534 | { |
535 | struct fnic_event *fevt; |
536 | unsigned long flags; |
537 | |
538 | fevt = kmalloc(size: sizeof(*fevt), GFP_ATOMIC); |
539 | if (!fevt) |
540 | return; |
541 | |
542 | fevt->fnic = fnic; |
543 | fevt->event = ev; |
544 | |
545 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
546 | list_add_tail(new: &fevt->list, head: &fnic->evlist); |
547 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
548 | |
549 | schedule_work(work: &fnic->event_work); |
550 | } |
551 | |
552 | static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb) |
553 | { |
554 | struct fip_header *fiph; |
555 | int ret = 1; |
556 | u16 op; |
557 | u8 sub; |
558 | |
559 | if (!skb || !(skb->data)) |
560 | return -1; |
561 | |
562 | if (skb_linearize(skb)) |
563 | goto drop; |
564 | |
565 | fiph = (struct fip_header *)skb->data; |
566 | op = ntohs(fiph->fip_op); |
567 | sub = fiph->fip_subcode; |
568 | |
569 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
570 | goto drop; |
571 | |
572 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) |
573 | goto drop; |
574 | |
575 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) { |
576 | if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags))) |
577 | goto drop; |
578 | /* pass it on to fcoe */ |
579 | ret = 1; |
580 | } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) { |
581 | /* set the vlan as used */ |
582 | fnic_fcoe_process_vlan_resp(fnic, skb); |
583 | ret = 0; |
584 | } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) { |
585 | /* received CVL request, restart vlan disc */ |
586 | fnic_event_enq(fnic, ev: FNIC_EVT_START_VLAN_DISC); |
587 | /* pass it on to fcoe */ |
588 | ret = 1; |
589 | } |
590 | drop: |
591 | return ret; |
592 | } |
593 | |
594 | void fnic_handle_fip_frame(struct work_struct *work) |
595 | { |
596 | struct fnic *fnic = container_of(work, struct fnic, fip_frame_work); |
597 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
598 | unsigned long flags; |
599 | struct sk_buff *skb; |
600 | struct ethhdr *eh; |
601 | |
602 | while ((skb = skb_dequeue(list: &fnic->fip_frame_queue))) { |
603 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
604 | if (fnic->stop_rx_link_events) { |
605 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
606 | dev_kfree_skb(skb); |
607 | return; |
608 | } |
609 | /* |
610 | * If we're in a transitional state, just re-queue and return. |
611 | * The queue will be serviced when we get to a stable state. |
612 | */ |
613 | if (fnic->state != FNIC_IN_FC_MODE && |
614 | fnic->state != FNIC_IN_ETH_MODE) { |
615 | skb_queue_head(list: &fnic->fip_frame_queue, newsk: skb); |
616 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
617 | return; |
618 | } |
619 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
620 | eh = (struct ethhdr *)skb->data; |
621 | if (eh->h_proto == htons(ETH_P_FIP)) { |
622 | skb_pull(skb, len: sizeof(*eh)); |
623 | if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) { |
624 | dev_kfree_skb(skb); |
625 | continue; |
626 | } |
627 | /* |
628 | * If there's FLOGI rejects - clear all |
629 | * fcf's & restart from scratch |
630 | */ |
631 | if (is_fnic_fip_flogi_reject(fip: &fnic->ctlr, skb)) { |
632 | atomic64_inc( |
633 | v: &fnic_stats->vlan_stats.flogi_rejects); |
634 | shost_printk(KERN_INFO, fnic->lport->host, |
635 | "Trigger a Link down - VLAN Disc\n" ); |
636 | fcoe_ctlr_link_down(&fnic->ctlr); |
637 | /* start FCoE VLAN discovery */ |
638 | fnic_fcoe_send_vlan_req(fnic); |
639 | dev_kfree_skb(skb); |
640 | continue; |
641 | } |
642 | fcoe_ctlr_recv(&fnic->ctlr, skb); |
643 | continue; |
644 | } |
645 | } |
646 | } |
647 | |
648 | /** |
649 | * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. |
650 | * @fnic: fnic instance. |
651 | * @skb: Ethernet Frame. |
652 | */ |
653 | static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb) |
654 | { |
655 | struct fc_frame *fp; |
656 | struct ethhdr *eh; |
657 | struct fcoe_hdr *fcoe_hdr; |
658 | struct fcoe_crc_eof *ft; |
659 | |
660 | /* |
661 | * Undo VLAN encapsulation if present. |
662 | */ |
663 | eh = (struct ethhdr *)skb->data; |
664 | if (eh->h_proto == htons(ETH_P_8021Q)) { |
665 | memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); |
666 | eh = skb_pull(skb, VLAN_HLEN); |
667 | skb_reset_mac_header(skb); |
668 | } |
669 | if (eh->h_proto == htons(ETH_P_FIP)) { |
670 | if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) { |
671 | printk(KERN_ERR "Dropped FIP frame, as firmware " |
672 | "uses non-FIP mode, Enable FIP " |
673 | "using UCSM\n" ); |
674 | goto drop; |
675 | } |
676 | if ((fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, |
677 | FNIC_FC_RECV|0x80, frame: (char *)skb->data, fc_frame_len: skb->len)) != 0) { |
678 | printk(KERN_ERR "fnic ctlr frame trace error!!!" ); |
679 | } |
680 | skb_queue_tail(list: &fnic->fip_frame_queue, newsk: skb); |
681 | queue_work(wq: fnic_fip_queue, work: &fnic->fip_frame_work); |
682 | return 1; /* let caller know packet was used */ |
683 | } |
684 | if (eh->h_proto != htons(ETH_P_FCOE)) |
685 | goto drop; |
686 | skb_set_network_header(skb, offset: sizeof(*eh)); |
687 | skb_pull(skb, len: sizeof(*eh)); |
688 | |
689 | fcoe_hdr = (struct fcoe_hdr *)skb->data; |
690 | if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) |
691 | goto drop; |
692 | |
693 | fp = (struct fc_frame *)skb; |
694 | fc_frame_init(fp); |
695 | fr_sof(fp) = fcoe_hdr->fcoe_sof; |
696 | skb_pull(skb, len: sizeof(struct fcoe_hdr)); |
697 | skb_reset_transport_header(skb); |
698 | |
699 | ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); |
700 | fr_eof(fp) = ft->fcoe_eof; |
701 | skb_trim(skb, len: skb->len - sizeof(*ft)); |
702 | return 0; |
703 | drop: |
704 | dev_kfree_skb_irq(skb); |
705 | return -1; |
706 | } |
707 | |
708 | /** |
709 | * fnic_update_mac_locked() - set data MAC address and filters. |
710 | * @fnic: fnic instance. |
711 | * @new: newly-assigned FCoE MAC address. |
712 | * |
713 | * Called with the fnic lock held. |
714 | */ |
715 | void fnic_update_mac_locked(struct fnic *fnic, u8 *new) |
716 | { |
717 | u8 *ctl = fnic->ctlr.ctl_src_addr; |
718 | u8 *data = fnic->data_src_addr; |
719 | |
720 | if (is_zero_ether_addr(addr: new)) |
721 | new = ctl; |
722 | if (ether_addr_equal(addr1: data, addr2: new)) |
723 | return; |
724 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n" , new); |
725 | if (!is_zero_ether_addr(addr: data) && !ether_addr_equal(addr1: data, addr2: ctl)) |
726 | vnic_dev_del_addr(vdev: fnic->vdev, addr: data); |
727 | memcpy(data, new, ETH_ALEN); |
728 | if (!ether_addr_equal(addr1: new, addr2: ctl)) |
729 | vnic_dev_add_addr(vdev: fnic->vdev, addr: new); |
730 | } |
731 | |
732 | /** |
733 | * fnic_update_mac() - set data MAC address and filters. |
734 | * @lport: local port. |
735 | * @new: newly-assigned FCoE MAC address. |
736 | */ |
737 | void fnic_update_mac(struct fc_lport *lport, u8 *new) |
738 | { |
739 | struct fnic *fnic = lport_priv(lport); |
740 | |
741 | spin_lock_irq(lock: &fnic->fnic_lock); |
742 | fnic_update_mac_locked(fnic, new); |
743 | spin_unlock_irq(lock: &fnic->fnic_lock); |
744 | } |
745 | |
746 | /** |
747 | * fnic_set_port_id() - set the port_ID after successful FLOGI. |
748 | * @lport: local port. |
749 | * @port_id: assigned FC_ID. |
750 | * @fp: received frame containing the FLOGI accept or NULL. |
751 | * |
752 | * This is called from libfc when a new FC_ID has been assigned. |
753 | * This causes us to reset the firmware to FC_MODE and setup the new MAC |
754 | * address and FC_ID. |
755 | * |
756 | * It is also called with FC_ID 0 when we're logged off. |
757 | * |
758 | * If the FC_ID is due to point-to-point, fp may be NULL. |
759 | */ |
760 | void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) |
761 | { |
762 | struct fnic *fnic = lport_priv(lport); |
763 | u8 *mac; |
764 | int ret; |
765 | |
766 | FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n" , |
767 | port_id, fp); |
768 | |
769 | /* |
770 | * If we're clearing the FC_ID, change to use the ctl_src_addr. |
771 | * Set ethernet mode to send FLOGI. |
772 | */ |
773 | if (!port_id) { |
774 | fnic_update_mac(lport, new: fnic->ctlr.ctl_src_addr); |
775 | fnic_set_eth_mode(fnic); |
776 | return; |
777 | } |
778 | |
779 | if (fp) { |
780 | mac = fr_cb(fp)->granted_mac; |
781 | if (is_zero_ether_addr(addr: mac)) { |
782 | /* non-FIP - FLOGI already accepted - ignore return */ |
783 | fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); |
784 | } |
785 | fnic_update_mac(lport, new: mac); |
786 | } |
787 | |
788 | /* Change state to reflect transition to FC mode */ |
789 | spin_lock_irq(lock: &fnic->fnic_lock); |
790 | if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE) |
791 | fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; |
792 | else { |
793 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
794 | "Unexpected fnic state %s while" |
795 | " processing flogi resp\n" , |
796 | fnic_state_to_str(fnic->state)); |
797 | spin_unlock_irq(lock: &fnic->fnic_lock); |
798 | return; |
799 | } |
800 | spin_unlock_irq(lock: &fnic->fnic_lock); |
801 | |
802 | /* |
803 | * Send FLOGI registration to firmware to set up FC mode. |
804 | * The new address will be set up when registration completes. |
805 | */ |
806 | ret = fnic_flogi_reg_handler(fnic, port_id); |
807 | |
808 | if (ret < 0) { |
809 | spin_lock_irq(lock: &fnic->fnic_lock); |
810 | if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) |
811 | fnic->state = FNIC_IN_ETH_MODE; |
812 | spin_unlock_irq(lock: &fnic->fnic_lock); |
813 | } |
814 | } |
815 | |
816 | static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc |
817 | *cq_desc, struct vnic_rq_buf *buf, |
818 | int skipped __attribute__((unused)), |
819 | void *opaque) |
820 | { |
821 | struct fnic *fnic = vnic_dev_priv(vdev: rq->vdev); |
822 | struct sk_buff *skb; |
823 | struct fc_frame *fp; |
824 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
825 | u8 type, color, eop, sop, ingress_port, vlan_stripped; |
826 | u8 fcoe = 0, fcoe_sof, fcoe_eof; |
827 | u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; |
828 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; |
829 | u8 ipv6, ipv4, ipv4_fragment, , csum_not_calc; |
830 | u8 fcs_ok = 1, packet_error = 0; |
831 | u16 q_number, completed_index, bytes_written = 0, vlan, checksum; |
832 | u32 ; |
833 | u16 exchange_id, tmpl; |
834 | u8 sof = 0; |
835 | u8 eof = 0; |
836 | u32 fcp_bytes_written = 0; |
837 | unsigned long flags; |
838 | |
839 | dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
840 | DMA_FROM_DEVICE); |
841 | skb = buf->os_buf; |
842 | fp = (struct fc_frame *)skb; |
843 | buf->os_buf = NULL; |
844 | |
845 | cq_desc_dec(desc_arg: cq_desc, type: &type, color: &color, q_number: &q_number, completed_index: &completed_index); |
846 | if (type == CQ_DESC_TYPE_RQ_FCP) { |
847 | cq_fcp_rq_desc_dec(desc_ptr: (struct cq_fcp_rq_desc *)cq_desc, |
848 | type: &type, color: &color, q_number: &q_number, completed_index: &completed_index, |
849 | eop: &eop, sop: &sop, fck: &fcoe_fc_crc_ok, exchange_id: &exchange_id, |
850 | tmpl: &tmpl, bytes_written: &fcp_bytes_written, sof: &sof, eof: &eof, |
851 | ingress_port: &ingress_port, packet_err: &packet_error, |
852 | fcoe_err: &fcoe_enc_error, fcs_ok: &fcs_ok, vlan_stripped: &vlan_stripped, |
853 | vlan: &vlan); |
854 | skb_trim(skb, len: fcp_bytes_written); |
855 | fr_sof(fp) = sof; |
856 | fr_eof(fp) = eof; |
857 | |
858 | } else if (type == CQ_DESC_TYPE_RQ_ENET) { |
859 | cq_enet_rq_desc_dec(desc: (struct cq_enet_rq_desc *)cq_desc, |
860 | type: &type, color: &color, q_number: &q_number, completed_index: &completed_index, |
861 | ingress_port: &ingress_port, fcoe: &fcoe, eop: &eop, sop: &sop, |
862 | rss_type: &rss_type, csum_not_calc: &csum_not_calc, rss_hash: &rss_hash, |
863 | bytes_written: &bytes_written, packet_error: &packet_error, |
864 | vlan_stripped: &vlan_stripped, vlan: &vlan, checksum: &checksum, |
865 | fcoe_sof: &fcoe_sof, fcoe_fc_crc_ok: &fcoe_fc_crc_ok, |
866 | fcoe_enc_error: &fcoe_enc_error, fcoe_eof: &fcoe_eof, |
867 | tcp_udp_csum_ok: &tcp_udp_csum_ok, udp: &udp, tcp: &tcp, |
868 | ipv4_csum_ok: &ipv4_csum_ok, ipv6: &ipv6, ipv4: &ipv4, |
869 | ipv4_fragment: &ipv4_fragment, fcs_ok: &fcs_ok); |
870 | skb_trim(skb, len: bytes_written); |
871 | if (!fcs_ok) { |
872 | atomic64_inc(v: &fnic_stats->misc_stats.frame_errors); |
873 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
874 | "fcs error. dropping packet.\n" ); |
875 | goto drop; |
876 | } |
877 | if (fnic_import_rq_eth_pkt(fnic, skb)) |
878 | return; |
879 | |
880 | } else { |
881 | /* wrong CQ type*/ |
882 | shost_printk(KERN_ERR, fnic->lport->host, |
883 | "fnic rq_cmpl wrong cq type x%x\n" , type); |
884 | goto drop; |
885 | } |
886 | |
887 | if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { |
888 | atomic64_inc(v: &fnic_stats->misc_stats.frame_errors); |
889 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
890 | "fnic rq_cmpl fcoe x%x fcsok x%x" |
891 | " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" |
892 | " x%x\n" , |
893 | fcoe, fcs_ok, packet_error, |
894 | fcoe_fc_crc_ok, fcoe_enc_error); |
895 | goto drop; |
896 | } |
897 | |
898 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
899 | if (fnic->stop_rx_link_events) { |
900 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
901 | goto drop; |
902 | } |
903 | fr_dev(fp) = fnic->lport; |
904 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
905 | if ((fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, FNIC_FC_RECV, |
906 | frame: (char *)skb->data, fc_frame_len: skb->len)) != 0) { |
907 | printk(KERN_ERR "fnic ctlr frame trace error!!!" ); |
908 | } |
909 | |
910 | skb_queue_tail(list: &fnic->frame_queue, newsk: skb); |
911 | queue_work(wq: fnic_event_queue, work: &fnic->frame_work); |
912 | |
913 | return; |
914 | drop: |
915 | dev_kfree_skb_irq(skb); |
916 | } |
917 | |
918 | static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, |
919 | struct cq_desc *cq_desc, u8 type, |
920 | u16 q_number, u16 completed_index, |
921 | void *opaque) |
922 | { |
923 | struct fnic *fnic = vnic_dev_priv(vdev); |
924 | |
925 | vnic_rq_service(rq: &fnic->rq[q_number], cq_desc, completed_index, |
926 | desc_return: VNIC_RQ_RETURN_DESC, buf_service: fnic_rq_cmpl_frame_recv, |
927 | NULL); |
928 | return 0; |
929 | } |
930 | |
931 | int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) |
932 | { |
933 | unsigned int tot_rq_work_done = 0, cur_work_done; |
934 | unsigned int i; |
935 | int err; |
936 | |
937 | for (i = 0; i < fnic->rq_count; i++) { |
938 | cur_work_done = vnic_cq_service(cq: &fnic->cq[i], work_to_do: rq_work_to_do, |
939 | q_service: fnic_rq_cmpl_handler_cont, |
940 | NULL); |
941 | if (cur_work_done) { |
942 | err = vnic_rq_fill(rq: &fnic->rq[i], buf_fill: fnic_alloc_rq_frame); |
943 | if (err) |
944 | shost_printk(KERN_ERR, fnic->lport->host, |
945 | "fnic_alloc_rq_frame can't alloc" |
946 | " frame\n" ); |
947 | } |
948 | tot_rq_work_done += cur_work_done; |
949 | } |
950 | |
951 | return tot_rq_work_done; |
952 | } |
953 | |
954 | /* |
955 | * This function is called once at init time to allocate and fill RQ |
956 | * buffers. Subsequently, it is called in the interrupt context after RQ |
957 | * buffer processing to replenish the buffers in the RQ |
958 | */ |
959 | int fnic_alloc_rq_frame(struct vnic_rq *rq) |
960 | { |
961 | struct fnic *fnic = vnic_dev_priv(vdev: rq->vdev); |
962 | struct sk_buff *skb; |
963 | u16 len; |
964 | dma_addr_t pa; |
965 | int r; |
966 | |
967 | len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; |
968 | skb = dev_alloc_skb(length: len); |
969 | if (!skb) { |
970 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
971 | "Unable to allocate RQ sk_buff\n" ); |
972 | return -ENOMEM; |
973 | } |
974 | skb_reset_mac_header(skb); |
975 | skb_reset_transport_header(skb); |
976 | skb_reset_network_header(skb); |
977 | skb_put(skb, len); |
978 | pa = dma_map_single(&fnic->pdev->dev, skb->data, len, DMA_FROM_DEVICE); |
979 | if (dma_mapping_error(dev: &fnic->pdev->dev, dma_addr: pa)) { |
980 | r = -ENOMEM; |
981 | printk(KERN_ERR "PCI mapping failed with error %d\n" , r); |
982 | goto free_skb; |
983 | } |
984 | |
985 | fnic_queue_rq_desc(rq, os_buf: skb, dma_addr: pa, len); |
986 | return 0; |
987 | |
988 | free_skb: |
989 | kfree_skb(skb); |
990 | return r; |
991 | } |
992 | |
993 | void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) |
994 | { |
995 | struct fc_frame *fp = buf->os_buf; |
996 | struct fnic *fnic = vnic_dev_priv(vdev: rq->vdev); |
997 | |
998 | dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
999 | DMA_FROM_DEVICE); |
1000 | |
1001 | dev_kfree_skb(fp_skb(fp)); |
1002 | buf->os_buf = NULL; |
1003 | } |
1004 | |
1005 | /** |
1006 | * fnic_eth_send() - Send Ethernet frame. |
1007 | * @fip: fcoe_ctlr instance. |
1008 | * @skb: Ethernet Frame, FIP, without VLAN encapsulation. |
1009 | */ |
1010 | void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) |
1011 | { |
1012 | struct fnic *fnic = fnic_from_ctlr(fip); |
1013 | struct vnic_wq *wq = &fnic->wq[0]; |
1014 | dma_addr_t pa; |
1015 | struct ethhdr *eth_hdr; |
1016 | struct vlan_ethhdr *vlan_hdr; |
1017 | unsigned long flags; |
1018 | |
1019 | if (!fnic->vlan_hw_insert) { |
1020 | eth_hdr = (struct ethhdr *)skb_mac_header(skb); |
1021 | vlan_hdr = skb_push(skb, len: sizeof(*vlan_hdr) - sizeof(*eth_hdr)); |
1022 | memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); |
1023 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
1024 | vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; |
1025 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
1026 | if ((fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, |
1027 | FNIC_FC_SEND|0x80, frame: (char *)eth_hdr, fc_frame_len: skb->len)) != 0) { |
1028 | printk(KERN_ERR "fnic ctlr frame trace error!!!" ); |
1029 | } |
1030 | } else { |
1031 | if ((fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, |
1032 | FNIC_FC_SEND|0x80, frame: (char *)skb->data, fc_frame_len: skb->len)) != 0) { |
1033 | printk(KERN_ERR "fnic ctlr frame trace error!!!" ); |
1034 | } |
1035 | } |
1036 | |
1037 | pa = dma_map_single(&fnic->pdev->dev, skb->data, skb->len, |
1038 | DMA_TO_DEVICE); |
1039 | if (dma_mapping_error(dev: &fnic->pdev->dev, dma_addr: pa)) { |
1040 | printk(KERN_ERR "DMA mapping failed\n" ); |
1041 | goto free_skb; |
1042 | } |
1043 | |
1044 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
1045 | if (!vnic_wq_desc_avail(wq)) |
1046 | goto irq_restore; |
1047 | |
1048 | fnic_queue_wq_eth_desc(wq, os_buf: skb, dma_addr: pa, len: skb->len, |
1049 | vlan_tag_insert: 0 /* hw inserts cos value */, |
1050 | vlan_tag: fnic->vlan_id, cq_entry: 1); |
1051 | spin_unlock_irqrestore(lock: &fnic->wq_lock[0], flags); |
1052 | return; |
1053 | |
1054 | irq_restore: |
1055 | spin_unlock_irqrestore(lock: &fnic->wq_lock[0], flags); |
1056 | dma_unmap_single(&fnic->pdev->dev, pa, skb->len, DMA_TO_DEVICE); |
1057 | free_skb: |
1058 | kfree_skb(skb); |
1059 | } |
1060 | |
1061 | /* |
1062 | * Send FC frame. |
1063 | */ |
1064 | static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) |
1065 | { |
1066 | struct vnic_wq *wq = &fnic->wq[0]; |
1067 | struct sk_buff *skb; |
1068 | dma_addr_t pa; |
1069 | struct ethhdr *eth_hdr; |
1070 | struct vlan_ethhdr *vlan_hdr; |
1071 | struct fcoe_hdr *fcoe_hdr; |
1072 | struct fc_frame_header *fh; |
1073 | u32 tot_len, eth_hdr_len; |
1074 | int ret = 0; |
1075 | unsigned long flags; |
1076 | |
1077 | fh = fc_frame_header_get(fp); |
1078 | skb = fp_skb(fp); |
1079 | |
1080 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
1081 | fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) |
1082 | return 0; |
1083 | |
1084 | if (!fnic->vlan_hw_insert) { |
1085 | eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); |
1086 | vlan_hdr = skb_push(skb, len: eth_hdr_len); |
1087 | eth_hdr = (struct ethhdr *)vlan_hdr; |
1088 | vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); |
1089 | vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); |
1090 | vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); |
1091 | fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); |
1092 | } else { |
1093 | eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); |
1094 | eth_hdr = skb_push(skb, len: eth_hdr_len); |
1095 | eth_hdr->h_proto = htons(ETH_P_FCOE); |
1096 | fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); |
1097 | } |
1098 | |
1099 | if (fnic->ctlr.map_dest) |
1100 | fc_fcoe_set_mac(mac: eth_hdr->h_dest, did: fh->fh_d_id); |
1101 | else |
1102 | memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); |
1103 | memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); |
1104 | |
1105 | tot_len = skb->len; |
1106 | BUG_ON(tot_len % 4); |
1107 | |
1108 | memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); |
1109 | fcoe_hdr->fcoe_sof = fr_sof(fp); |
1110 | if (FC_FCOE_VER) |
1111 | FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); |
1112 | |
1113 | pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE); |
1114 | if (dma_mapping_error(dev: &fnic->pdev->dev, dma_addr: pa)) { |
1115 | ret = -ENOMEM; |
1116 | printk(KERN_ERR "DMA map failed with error %d\n" , ret); |
1117 | goto free_skb_on_err; |
1118 | } |
1119 | |
1120 | if ((fnic_fc_trace_set_data(host_no: fnic->lport->host->host_no, FNIC_FC_SEND, |
1121 | frame: (char *)eth_hdr, fc_frame_len: tot_len)) != 0) { |
1122 | printk(KERN_ERR "fnic ctlr frame trace error!!!" ); |
1123 | } |
1124 | |
1125 | spin_lock_irqsave(&fnic->wq_lock[0], flags); |
1126 | |
1127 | if (!vnic_wq_desc_avail(wq)) { |
1128 | dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE); |
1129 | ret = -1; |
1130 | goto irq_restore; |
1131 | } |
1132 | |
1133 | fnic_queue_wq_desc(wq, os_buf: skb, dma_addr: pa, len: tot_len, fr_eof(fp), |
1134 | vlan_tag_insert: 0 /* hw inserts cos value */, |
1135 | vlan_tag: fnic->vlan_id, cq_entry: 1, sop: 1, eop: 1); |
1136 | |
1137 | irq_restore: |
1138 | spin_unlock_irqrestore(lock: &fnic->wq_lock[0], flags); |
1139 | |
1140 | free_skb_on_err: |
1141 | if (ret) |
1142 | dev_kfree_skb_any(fp_skb(fp)); |
1143 | |
1144 | return ret; |
1145 | } |
1146 | |
1147 | /* |
1148 | * fnic_send |
1149 | * Routine to send a raw frame |
1150 | */ |
1151 | int fnic_send(struct fc_lport *lp, struct fc_frame *fp) |
1152 | { |
1153 | struct fnic *fnic = lport_priv(lport: lp); |
1154 | unsigned long flags; |
1155 | |
1156 | if (fnic->in_remove) { |
1157 | dev_kfree_skb(fp_skb(fp)); |
1158 | return -1; |
1159 | } |
1160 | |
1161 | /* |
1162 | * Queue frame if in a transitional state. |
1163 | * This occurs while registering the Port_ID / MAC address after FLOGI. |
1164 | */ |
1165 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
1166 | if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { |
1167 | skb_queue_tail(list: &fnic->tx_queue, fp_skb(fp)); |
1168 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
1169 | return 0; |
1170 | } |
1171 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
1172 | |
1173 | return fnic_send_frame(fnic, fp); |
1174 | } |
1175 | |
1176 | /** |
1177 | * fnic_flush_tx() - send queued frames. |
1178 | * @fnic: fnic device |
1179 | * |
1180 | * Send frames that were waiting to go out in FC or Ethernet mode. |
1181 | * Whenever changing modes we purge queued frames, so these frames should |
1182 | * be queued for the stable mode that we're in, either FC or Ethernet. |
1183 | * |
1184 | * Called without fnic_lock held. |
1185 | */ |
1186 | void fnic_flush_tx(struct fnic *fnic) |
1187 | { |
1188 | struct sk_buff *skb; |
1189 | struct fc_frame *fp; |
1190 | |
1191 | while ((skb = skb_dequeue(list: &fnic->tx_queue))) { |
1192 | fp = (struct fc_frame *)skb; |
1193 | fnic_send_frame(fnic, fp); |
1194 | } |
1195 | } |
1196 | |
1197 | /** |
1198 | * fnic_set_eth_mode() - put fnic into ethernet mode. |
1199 | * @fnic: fnic device |
1200 | * |
1201 | * Called without fnic lock held. |
1202 | */ |
1203 | static void fnic_set_eth_mode(struct fnic *fnic) |
1204 | { |
1205 | unsigned long flags; |
1206 | enum fnic_state old_state; |
1207 | int ret; |
1208 | |
1209 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
1210 | again: |
1211 | old_state = fnic->state; |
1212 | switch (old_state) { |
1213 | case FNIC_IN_FC_MODE: |
1214 | case FNIC_IN_ETH_TRANS_FC_MODE: |
1215 | default: |
1216 | fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; |
1217 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
1218 | |
1219 | ret = fnic_fw_reset_handler(fnic); |
1220 | |
1221 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
1222 | if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) |
1223 | goto again; |
1224 | if (ret) |
1225 | fnic->state = old_state; |
1226 | break; |
1227 | |
1228 | case FNIC_IN_FC_TRANS_ETH_MODE: |
1229 | case FNIC_IN_ETH_MODE: |
1230 | break; |
1231 | } |
1232 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
1233 | } |
1234 | |
1235 | static void fnic_wq_complete_frame_send(struct vnic_wq *wq, |
1236 | struct cq_desc *cq_desc, |
1237 | struct vnic_wq_buf *buf, void *opaque) |
1238 | { |
1239 | struct sk_buff *skb = buf->os_buf; |
1240 | struct fc_frame *fp = (struct fc_frame *)skb; |
1241 | struct fnic *fnic = vnic_dev_priv(vdev: wq->vdev); |
1242 | |
1243 | dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
1244 | DMA_TO_DEVICE); |
1245 | dev_kfree_skb_irq(fp_skb(fp)); |
1246 | buf->os_buf = NULL; |
1247 | } |
1248 | |
1249 | static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, |
1250 | struct cq_desc *cq_desc, u8 type, |
1251 | u16 q_number, u16 completed_index, |
1252 | void *opaque) |
1253 | { |
1254 | struct fnic *fnic = vnic_dev_priv(vdev); |
1255 | unsigned long flags; |
1256 | |
1257 | spin_lock_irqsave(&fnic->wq_lock[q_number], flags); |
1258 | vnic_wq_service(wq: &fnic->wq[q_number], cq_desc, completed_index, |
1259 | buf_service: fnic_wq_complete_frame_send, NULL); |
1260 | spin_unlock_irqrestore(lock: &fnic->wq_lock[q_number], flags); |
1261 | |
1262 | return 0; |
1263 | } |
1264 | |
1265 | int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) |
1266 | { |
1267 | unsigned int wq_work_done = 0; |
1268 | unsigned int i; |
1269 | |
1270 | for (i = 0; i < fnic->raw_wq_count; i++) { |
1271 | wq_work_done += vnic_cq_service(cq: &fnic->cq[fnic->rq_count+i], |
1272 | work_to_do, |
1273 | q_service: fnic_wq_cmpl_handler_cont, |
1274 | NULL); |
1275 | } |
1276 | |
1277 | return wq_work_done; |
1278 | } |
1279 | |
1280 | |
1281 | void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) |
1282 | { |
1283 | struct fc_frame *fp = buf->os_buf; |
1284 | struct fnic *fnic = vnic_dev_priv(vdev: wq->vdev); |
1285 | |
1286 | dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len, |
1287 | DMA_TO_DEVICE); |
1288 | |
1289 | dev_kfree_skb(fp_skb(fp)); |
1290 | buf->os_buf = NULL; |
1291 | } |
1292 | |
1293 | void fnic_fcoe_reset_vlans(struct fnic *fnic) |
1294 | { |
1295 | unsigned long flags; |
1296 | struct fcoe_vlan *vlan; |
1297 | struct fcoe_vlan *next; |
1298 | |
1299 | /* |
1300 | * indicate a link down to fcoe so that all fcf's are free'd |
1301 | * might not be required since we did this before sending vlan |
1302 | * discovery request |
1303 | */ |
1304 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
1305 | if (!list_empty(head: &fnic->vlans)) { |
1306 | list_for_each_entry_safe(vlan, next, &fnic->vlans, list) { |
1307 | list_del(entry: &vlan->list); |
1308 | kfree(objp: vlan); |
1309 | } |
1310 | } |
1311 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
1312 | } |
1313 | |
1314 | void fnic_handle_fip_timer(struct fnic *fnic) |
1315 | { |
1316 | unsigned long flags; |
1317 | struct fcoe_vlan *vlan; |
1318 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
1319 | u64 sol_time; |
1320 | |
1321 | spin_lock_irqsave(&fnic->fnic_lock, flags); |
1322 | if (fnic->stop_rx_link_events) { |
1323 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
1324 | return; |
1325 | } |
1326 | spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags); |
1327 | |
1328 | if (fnic->ctlr.mode == FIP_MODE_NON_FIP) |
1329 | return; |
1330 | |
1331 | spin_lock_irqsave(&fnic->vlans_lock, flags); |
1332 | if (list_empty(head: &fnic->vlans)) { |
1333 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
1334 | /* no vlans available, try again */ |
1335 | if (unlikely(fnic_log_level & FNIC_FCS_LOGGING)) |
1336 | if (printk_ratelimit()) |
1337 | shost_printk(KERN_DEBUG, fnic->lport->host, |
1338 | "Start VLAN Discovery\n" ); |
1339 | fnic_event_enq(fnic, ev: FNIC_EVT_START_VLAN_DISC); |
1340 | return; |
1341 | } |
1342 | |
1343 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list); |
1344 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
1345 | "fip_timer: vlan %d state %d sol_count %d\n" , |
1346 | vlan->vid, vlan->state, vlan->sol_count); |
1347 | switch (vlan->state) { |
1348 | case FIP_VLAN_USED: |
1349 | FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, |
1350 | "FIP VLAN is selected for FC transaction\n" ); |
1351 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
1352 | break; |
1353 | case FIP_VLAN_FAILED: |
1354 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
1355 | /* if all vlans are in failed state, restart vlan disc */ |
1356 | if (unlikely(fnic_log_level & FNIC_FCS_LOGGING)) |
1357 | if (printk_ratelimit()) |
1358 | shost_printk(KERN_DEBUG, fnic->lport->host, |
1359 | "Start VLAN Discovery\n" ); |
1360 | fnic_event_enq(fnic, ev: FNIC_EVT_START_VLAN_DISC); |
1361 | break; |
1362 | case FIP_VLAN_SENT: |
1363 | if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) { |
1364 | /* |
1365 | * no response on this vlan, remove from the list. |
1366 | * Try the next vlan |
1367 | */ |
1368 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
1369 | "Dequeue this VLAN ID %d from list\n" , |
1370 | vlan->vid); |
1371 | list_del(entry: &vlan->list); |
1372 | kfree(objp: vlan); |
1373 | vlan = NULL; |
1374 | if (list_empty(head: &fnic->vlans)) { |
1375 | /* we exhausted all vlans, restart vlan disc */ |
1376 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, |
1377 | flags); |
1378 | FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, |
1379 | "fip_timer: vlan list empty, " |
1380 | "trigger vlan disc\n" ); |
1381 | fnic_event_enq(fnic, ev: FNIC_EVT_START_VLAN_DISC); |
1382 | return; |
1383 | } |
1384 | /* check the next vlan */ |
1385 | vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, |
1386 | list); |
1387 | fnic->set_vlan(fnic, vlan->vid); |
1388 | vlan->state = FIP_VLAN_SENT; /* sent now */ |
1389 | } |
1390 | spin_unlock_irqrestore(lock: &fnic->vlans_lock, flags); |
1391 | atomic64_inc(v: &fnic_stats->vlan_stats.sol_expiry_count); |
1392 | vlan->sol_count++; |
1393 | sol_time = jiffies + msecs_to_jiffies |
1394 | (FCOE_CTLR_START_DELAY); |
1395 | mod_timer(timer: &fnic->fip_timer, expires: round_jiffies(j: sol_time)); |
1396 | break; |
1397 | } |
1398 | } |
1399 | |