1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright Gavin Shan, IBM Corporation 2016. |
4 | */ |
5 | |
6 | #include <linux/module.h> |
7 | #include <linux/kernel.h> |
8 | #include <linux/init.h> |
9 | #include <linux/netdevice.h> |
10 | #include <linux/skbuff.h> |
11 | #include <linux/of.h> |
12 | #include <linux/platform_device.h> |
13 | |
14 | #include <net/ncsi.h> |
15 | #include <net/net_namespace.h> |
16 | #include <net/sock.h> |
17 | #include <net/addrconf.h> |
18 | #include <net/ipv6.h> |
19 | #include <net/genetlink.h> |
20 | |
21 | #include "internal.h" |
22 | #include "ncsi-pkt.h" |
23 | #include "ncsi-netlink.h" |
24 | |
25 | LIST_HEAD(ncsi_dev_list); |
26 | DEFINE_SPINLOCK(ncsi_dev_lock); |
27 | |
28 | bool ncsi_channel_has_link(struct ncsi_channel *channel) |
29 | { |
30 | return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1); |
31 | } |
32 | |
33 | bool ncsi_channel_is_last(struct ncsi_dev_priv *ndp, |
34 | struct ncsi_channel *channel) |
35 | { |
36 | struct ncsi_package *np; |
37 | struct ncsi_channel *nc; |
38 | |
39 | NCSI_FOR_EACH_PACKAGE(ndp, np) |
40 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
41 | if (nc == channel) |
42 | continue; |
43 | if (nc->state == NCSI_CHANNEL_ACTIVE && |
44 | ncsi_channel_has_link(channel: nc)) |
45 | return false; |
46 | } |
47 | |
48 | return true; |
49 | } |
50 | |
51 | static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down) |
52 | { |
53 | struct ncsi_dev *nd = &ndp->ndev; |
54 | struct ncsi_package *np; |
55 | struct ncsi_channel *nc; |
56 | unsigned long flags; |
57 | |
58 | nd->state = ncsi_dev_state_functional; |
59 | if (force_down) { |
60 | nd->link_up = 0; |
61 | goto report; |
62 | } |
63 | |
64 | nd->link_up = 0; |
65 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
66 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
67 | spin_lock_irqsave(&nc->lock, flags); |
68 | |
69 | if (!list_empty(head: &nc->link) || |
70 | nc->state != NCSI_CHANNEL_ACTIVE) { |
71 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
72 | continue; |
73 | } |
74 | |
75 | if (ncsi_channel_has_link(channel: nc)) { |
76 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
77 | nd->link_up = 1; |
78 | goto report; |
79 | } |
80 | |
81 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
82 | } |
83 | } |
84 | |
85 | report: |
86 | nd->handler(nd); |
87 | } |
88 | |
89 | static void ncsi_channel_monitor(struct timer_list *t) |
90 | { |
91 | struct ncsi_channel *nc = from_timer(nc, t, monitor.timer); |
92 | struct ncsi_package *np = nc->package; |
93 | struct ncsi_dev_priv *ndp = np->ndp; |
94 | struct ncsi_channel_mode *ncm; |
95 | struct ncsi_cmd_arg nca; |
96 | bool enabled, chained; |
97 | unsigned int monitor_state; |
98 | unsigned long flags; |
99 | int state, ret; |
100 | |
101 | spin_lock_irqsave(&nc->lock, flags); |
102 | state = nc->state; |
103 | chained = !list_empty(head: &nc->link); |
104 | enabled = nc->monitor.enabled; |
105 | monitor_state = nc->monitor.state; |
106 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
107 | |
108 | if (!enabled) |
109 | return; /* expected race disabling timer */ |
110 | if (WARN_ON_ONCE(chained)) |
111 | goto bad_state; |
112 | |
113 | if (state != NCSI_CHANNEL_INACTIVE && |
114 | state != NCSI_CHANNEL_ACTIVE) { |
115 | bad_state: |
116 | netdev_warn(dev: ndp->ndev.dev, |
117 | format: "Bad NCSI monitor state channel %d 0x%x %s queue\n" , |
118 | nc->id, state, chained ? "on" : "off" ); |
119 | spin_lock_irqsave(&nc->lock, flags); |
120 | nc->monitor.enabled = false; |
121 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
122 | return; |
123 | } |
124 | |
125 | switch (monitor_state) { |
126 | case NCSI_CHANNEL_MONITOR_START: |
127 | case NCSI_CHANNEL_MONITOR_RETRY: |
128 | nca.ndp = ndp; |
129 | nca.package = np->id; |
130 | nca.channel = nc->id; |
131 | nca.type = NCSI_PKT_CMD_GLS; |
132 | nca.req_flags = 0; |
133 | ret = ncsi_xmit_cmd(nca: &nca); |
134 | if (ret) |
135 | netdev_err(dev: ndp->ndev.dev, format: "Error %d sending GLS\n" , |
136 | ret); |
137 | break; |
138 | case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX: |
139 | break; |
140 | default: |
141 | netdev_err(dev: ndp->ndev.dev, format: "NCSI Channel %d timed out!\n" , |
142 | nc->id); |
143 | ncsi_report_link(ndp, force_down: true); |
144 | ndp->flags |= NCSI_DEV_RESHUFFLE; |
145 | |
146 | ncm = &nc->modes[NCSI_MODE_LINK]; |
147 | spin_lock_irqsave(&nc->lock, flags); |
148 | nc->monitor.enabled = false; |
149 | nc->state = NCSI_CHANNEL_INVISIBLE; |
150 | ncm->data[2] &= ~0x1; |
151 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
152 | |
153 | spin_lock_irqsave(&ndp->lock, flags); |
154 | nc->state = NCSI_CHANNEL_ACTIVE; |
155 | list_add_tail_rcu(new: &nc->link, head: &ndp->channel_queue); |
156 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
157 | ncsi_process_next_channel(ndp); |
158 | return; |
159 | } |
160 | |
161 | spin_lock_irqsave(&nc->lock, flags); |
162 | nc->monitor.state++; |
163 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
164 | mod_timer(timer: &nc->monitor.timer, expires: jiffies + HZ); |
165 | } |
166 | |
167 | void ncsi_start_channel_monitor(struct ncsi_channel *nc) |
168 | { |
169 | unsigned long flags; |
170 | |
171 | spin_lock_irqsave(&nc->lock, flags); |
172 | WARN_ON_ONCE(nc->monitor.enabled); |
173 | nc->monitor.enabled = true; |
174 | nc->monitor.state = NCSI_CHANNEL_MONITOR_START; |
175 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
176 | |
177 | mod_timer(timer: &nc->monitor.timer, expires: jiffies + HZ); |
178 | } |
179 | |
180 | void ncsi_stop_channel_monitor(struct ncsi_channel *nc) |
181 | { |
182 | unsigned long flags; |
183 | |
184 | spin_lock_irqsave(&nc->lock, flags); |
185 | if (!nc->monitor.enabled) { |
186 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
187 | return; |
188 | } |
189 | nc->monitor.enabled = false; |
190 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
191 | |
192 | del_timer_sync(timer: &nc->monitor.timer); |
193 | } |
194 | |
195 | struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np, |
196 | unsigned char id) |
197 | { |
198 | struct ncsi_channel *nc; |
199 | |
200 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
201 | if (nc->id == id) |
202 | return nc; |
203 | } |
204 | |
205 | return NULL; |
206 | } |
207 | |
208 | struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id) |
209 | { |
210 | struct ncsi_channel *nc, *tmp; |
211 | int index; |
212 | unsigned long flags; |
213 | |
214 | nc = kzalloc(size: sizeof(*nc), GFP_ATOMIC); |
215 | if (!nc) |
216 | return NULL; |
217 | |
218 | nc->id = id; |
219 | nc->package = np; |
220 | nc->state = NCSI_CHANNEL_INACTIVE; |
221 | nc->monitor.enabled = false; |
222 | timer_setup(&nc->monitor.timer, ncsi_channel_monitor, 0); |
223 | spin_lock_init(&nc->lock); |
224 | INIT_LIST_HEAD(list: &nc->link); |
225 | for (index = 0; index < NCSI_CAP_MAX; index++) |
226 | nc->caps[index].index = index; |
227 | for (index = 0; index < NCSI_MODE_MAX; index++) |
228 | nc->modes[index].index = index; |
229 | |
230 | spin_lock_irqsave(&np->lock, flags); |
231 | tmp = ncsi_find_channel(np, id); |
232 | if (tmp) { |
233 | spin_unlock_irqrestore(lock: &np->lock, flags); |
234 | kfree(objp: nc); |
235 | return tmp; |
236 | } |
237 | |
238 | list_add_tail_rcu(new: &nc->node, head: &np->channels); |
239 | np->channel_num++; |
240 | spin_unlock_irqrestore(lock: &np->lock, flags); |
241 | |
242 | return nc; |
243 | } |
244 | |
245 | static void ncsi_remove_channel(struct ncsi_channel *nc) |
246 | { |
247 | struct ncsi_package *np = nc->package; |
248 | unsigned long flags; |
249 | |
250 | spin_lock_irqsave(&nc->lock, flags); |
251 | |
252 | /* Release filters */ |
253 | kfree(objp: nc->mac_filter.addrs); |
254 | kfree(objp: nc->vlan_filter.vids); |
255 | |
256 | nc->state = NCSI_CHANNEL_INACTIVE; |
257 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
258 | ncsi_stop_channel_monitor(nc); |
259 | |
260 | /* Remove and free channel */ |
261 | spin_lock_irqsave(&np->lock, flags); |
262 | list_del_rcu(entry: &nc->node); |
263 | np->channel_num--; |
264 | spin_unlock_irqrestore(lock: &np->lock, flags); |
265 | |
266 | kfree(objp: nc); |
267 | } |
268 | |
269 | struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp, |
270 | unsigned char id) |
271 | { |
272 | struct ncsi_package *np; |
273 | |
274 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
275 | if (np->id == id) |
276 | return np; |
277 | } |
278 | |
279 | return NULL; |
280 | } |
281 | |
282 | struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp, |
283 | unsigned char id) |
284 | { |
285 | struct ncsi_package *np, *tmp; |
286 | unsigned long flags; |
287 | |
288 | np = kzalloc(size: sizeof(*np), GFP_ATOMIC); |
289 | if (!np) |
290 | return NULL; |
291 | |
292 | np->id = id; |
293 | np->ndp = ndp; |
294 | spin_lock_init(&np->lock); |
295 | INIT_LIST_HEAD(list: &np->channels); |
296 | np->channel_whitelist = UINT_MAX; |
297 | |
298 | spin_lock_irqsave(&ndp->lock, flags); |
299 | tmp = ncsi_find_package(ndp, id); |
300 | if (tmp) { |
301 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
302 | kfree(objp: np); |
303 | return tmp; |
304 | } |
305 | |
306 | list_add_tail_rcu(new: &np->node, head: &ndp->packages); |
307 | ndp->package_num++; |
308 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
309 | |
310 | return np; |
311 | } |
312 | |
313 | void ncsi_remove_package(struct ncsi_package *np) |
314 | { |
315 | struct ncsi_dev_priv *ndp = np->ndp; |
316 | struct ncsi_channel *nc, *tmp; |
317 | unsigned long flags; |
318 | |
319 | /* Release all child channels */ |
320 | list_for_each_entry_safe(nc, tmp, &np->channels, node) |
321 | ncsi_remove_channel(nc); |
322 | |
323 | /* Remove and free package */ |
324 | spin_lock_irqsave(&ndp->lock, flags); |
325 | list_del_rcu(entry: &np->node); |
326 | ndp->package_num--; |
327 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
328 | |
329 | kfree(objp: np); |
330 | } |
331 | |
332 | void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp, |
333 | unsigned char id, |
334 | struct ncsi_package **np, |
335 | struct ncsi_channel **nc) |
336 | { |
337 | struct ncsi_package *p; |
338 | struct ncsi_channel *c; |
339 | |
340 | p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id)); |
341 | c = p ? ncsi_find_channel(np: p, NCSI_CHANNEL_INDEX(id)) : NULL; |
342 | |
343 | if (np) |
344 | *np = p; |
345 | if (nc) |
346 | *nc = c; |
347 | } |
348 | |
349 | /* For two consecutive NCSI commands, the packet IDs shouldn't |
350 | * be same. Otherwise, the bogus response might be replied. So |
351 | * the available IDs are allocated in round-robin fashion. |
352 | */ |
353 | struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp, |
354 | unsigned int req_flags) |
355 | { |
356 | struct ncsi_request *nr = NULL; |
357 | int i, limit = ARRAY_SIZE(ndp->requests); |
358 | unsigned long flags; |
359 | |
360 | /* Check if there is one available request until the ceiling */ |
361 | spin_lock_irqsave(&ndp->lock, flags); |
362 | for (i = ndp->request_id; i < limit; i++) { |
363 | if (ndp->requests[i].used) |
364 | continue; |
365 | |
366 | nr = &ndp->requests[i]; |
367 | nr->used = true; |
368 | nr->flags = req_flags; |
369 | ndp->request_id = i + 1; |
370 | goto found; |
371 | } |
372 | |
373 | /* Fail back to check from the starting cursor */ |
374 | for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) { |
375 | if (ndp->requests[i].used) |
376 | continue; |
377 | |
378 | nr = &ndp->requests[i]; |
379 | nr->used = true; |
380 | nr->flags = req_flags; |
381 | ndp->request_id = i + 1; |
382 | goto found; |
383 | } |
384 | |
385 | found: |
386 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
387 | return nr; |
388 | } |
389 | |
390 | void ncsi_free_request(struct ncsi_request *nr) |
391 | { |
392 | struct ncsi_dev_priv *ndp = nr->ndp; |
393 | struct sk_buff *cmd, *rsp; |
394 | unsigned long flags; |
395 | bool driven; |
396 | |
397 | if (nr->enabled) { |
398 | nr->enabled = false; |
399 | del_timer_sync(timer: &nr->timer); |
400 | } |
401 | |
402 | spin_lock_irqsave(&ndp->lock, flags); |
403 | cmd = nr->cmd; |
404 | rsp = nr->rsp; |
405 | nr->cmd = NULL; |
406 | nr->rsp = NULL; |
407 | nr->used = false; |
408 | driven = !!(nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN); |
409 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
410 | |
411 | if (driven && cmd && --ndp->pending_req_num == 0) |
412 | schedule_work(work: &ndp->work); |
413 | |
414 | /* Release command and response */ |
415 | consume_skb(skb: cmd); |
416 | consume_skb(skb: rsp); |
417 | } |
418 | |
419 | struct ncsi_dev *ncsi_find_dev(struct net_device *dev) |
420 | { |
421 | struct ncsi_dev_priv *ndp; |
422 | |
423 | NCSI_FOR_EACH_DEV(ndp) { |
424 | if (ndp->ndev.dev == dev) |
425 | return &ndp->ndev; |
426 | } |
427 | |
428 | return NULL; |
429 | } |
430 | |
431 | static void ncsi_request_timeout(struct timer_list *t) |
432 | { |
433 | struct ncsi_request *nr = from_timer(nr, t, timer); |
434 | struct ncsi_dev_priv *ndp = nr->ndp; |
435 | struct ncsi_cmd_pkt *cmd; |
436 | struct ncsi_package *np; |
437 | struct ncsi_channel *nc; |
438 | unsigned long flags; |
439 | |
440 | /* If the request already had associated response, |
441 | * let the response handler to release it. |
442 | */ |
443 | spin_lock_irqsave(&ndp->lock, flags); |
444 | nr->enabled = false; |
445 | if (nr->rsp || !nr->cmd) { |
446 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
447 | return; |
448 | } |
449 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
450 | |
451 | if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) { |
452 | if (nr->cmd) { |
453 | /* Find the package */ |
454 | cmd = (struct ncsi_cmd_pkt *) |
455 | skb_network_header(skb: nr->cmd); |
456 | ncsi_find_package_and_channel(ndp, |
457 | id: cmd->cmd.common.channel, |
458 | np: &np, nc: &nc); |
459 | ncsi_send_netlink_timeout(nr, np, nc); |
460 | } |
461 | } |
462 | |
463 | /* Release the request */ |
464 | ncsi_free_request(nr); |
465 | } |
466 | |
467 | static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp) |
468 | { |
469 | struct ncsi_dev *nd = &ndp->ndev; |
470 | struct ncsi_package *np; |
471 | struct ncsi_channel *nc, *tmp; |
472 | struct ncsi_cmd_arg nca; |
473 | unsigned long flags; |
474 | int ret; |
475 | |
476 | np = ndp->active_package; |
477 | nc = ndp->active_channel; |
478 | nca.ndp = ndp; |
479 | nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; |
480 | switch (nd->state) { |
481 | case ncsi_dev_state_suspend: |
482 | nd->state = ncsi_dev_state_suspend_select; |
483 | fallthrough; |
484 | case ncsi_dev_state_suspend_select: |
485 | ndp->pending_req_num = 1; |
486 | |
487 | nca.type = NCSI_PKT_CMD_SP; |
488 | nca.package = np->id; |
489 | nca.channel = NCSI_RESERVED_CHANNEL; |
490 | if (ndp->flags & NCSI_DEV_HWA) |
491 | nca.bytes[0] = 0; |
492 | else |
493 | nca.bytes[0] = 1; |
494 | |
495 | /* To retrieve the last link states of channels in current |
496 | * package when current active channel needs fail over to |
497 | * another one. It means we will possibly select another |
498 | * channel as next active one. The link states of channels |
499 | * are most important factor of the selection. So we need |
500 | * accurate link states. Unfortunately, the link states on |
501 | * inactive channels can't be updated with LSC AEN in time. |
502 | */ |
503 | if (ndp->flags & NCSI_DEV_RESHUFFLE) |
504 | nd->state = ncsi_dev_state_suspend_gls; |
505 | else |
506 | nd->state = ncsi_dev_state_suspend_dcnt; |
507 | ret = ncsi_xmit_cmd(nca: &nca); |
508 | if (ret) |
509 | goto error; |
510 | |
511 | break; |
512 | case ncsi_dev_state_suspend_gls: |
513 | ndp->pending_req_num = np->channel_num; |
514 | |
515 | nca.type = NCSI_PKT_CMD_GLS; |
516 | nca.package = np->id; |
517 | |
518 | nd->state = ncsi_dev_state_suspend_dcnt; |
519 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
520 | nca.channel = nc->id; |
521 | ret = ncsi_xmit_cmd(nca: &nca); |
522 | if (ret) |
523 | goto error; |
524 | } |
525 | |
526 | break; |
527 | case ncsi_dev_state_suspend_dcnt: |
528 | ndp->pending_req_num = 1; |
529 | |
530 | nca.type = NCSI_PKT_CMD_DCNT; |
531 | nca.package = np->id; |
532 | nca.channel = nc->id; |
533 | |
534 | nd->state = ncsi_dev_state_suspend_dc; |
535 | ret = ncsi_xmit_cmd(nca: &nca); |
536 | if (ret) |
537 | goto error; |
538 | |
539 | break; |
540 | case ncsi_dev_state_suspend_dc: |
541 | ndp->pending_req_num = 1; |
542 | |
543 | nca.type = NCSI_PKT_CMD_DC; |
544 | nca.package = np->id; |
545 | nca.channel = nc->id; |
546 | nca.bytes[0] = 1; |
547 | |
548 | nd->state = ncsi_dev_state_suspend_deselect; |
549 | ret = ncsi_xmit_cmd(nca: &nca); |
550 | if (ret) |
551 | goto error; |
552 | |
553 | NCSI_FOR_EACH_CHANNEL(np, tmp) { |
554 | /* If there is another channel active on this package |
555 | * do not deselect the package. |
556 | */ |
557 | if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) { |
558 | nd->state = ncsi_dev_state_suspend_done; |
559 | break; |
560 | } |
561 | } |
562 | break; |
563 | case ncsi_dev_state_suspend_deselect: |
564 | ndp->pending_req_num = 1; |
565 | |
566 | nca.type = NCSI_PKT_CMD_DP; |
567 | nca.package = np->id; |
568 | nca.channel = NCSI_RESERVED_CHANNEL; |
569 | |
570 | nd->state = ncsi_dev_state_suspend_done; |
571 | ret = ncsi_xmit_cmd(nca: &nca); |
572 | if (ret) |
573 | goto error; |
574 | |
575 | break; |
576 | case ncsi_dev_state_suspend_done: |
577 | spin_lock_irqsave(&nc->lock, flags); |
578 | nc->state = NCSI_CHANNEL_INACTIVE; |
579 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
580 | if (ndp->flags & NCSI_DEV_RESET) |
581 | ncsi_reset_dev(nd); |
582 | else |
583 | ncsi_process_next_channel(ndp); |
584 | break; |
585 | default: |
586 | netdev_warn(dev: nd->dev, format: "Wrong NCSI state 0x%x in suspend\n" , |
587 | nd->state); |
588 | } |
589 | |
590 | return; |
591 | error: |
592 | nd->state = ncsi_dev_state_functional; |
593 | } |
594 | |
595 | /* Check the VLAN filter bitmap for a set filter, and construct a |
596 | * "Set VLAN Filter - Disable" packet if found. |
597 | */ |
598 | static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, |
599 | struct ncsi_cmd_arg *nca) |
600 | { |
601 | struct ncsi_channel_vlan_filter *ncf; |
602 | unsigned long flags; |
603 | void *bitmap; |
604 | int index; |
605 | u16 vid; |
606 | |
607 | ncf = &nc->vlan_filter; |
608 | bitmap = &ncf->bitmap; |
609 | |
610 | spin_lock_irqsave(&nc->lock, flags); |
611 | index = find_first_bit(addr: bitmap, size: ncf->n_vids); |
612 | if (index >= ncf->n_vids) { |
613 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
614 | return -1; |
615 | } |
616 | vid = ncf->vids[index]; |
617 | |
618 | clear_bit(nr: index, addr: bitmap); |
619 | ncf->vids[index] = 0; |
620 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
621 | |
622 | nca->type = NCSI_PKT_CMD_SVF; |
623 | nca->words[1] = vid; |
624 | /* HW filter index starts at 1 */ |
625 | nca->bytes[6] = index + 1; |
626 | nca->bytes[7] = 0x00; |
627 | return 0; |
628 | } |
629 | |
630 | /* Find an outstanding VLAN tag and construct a "Set VLAN Filter - Enable" |
631 | * packet. |
632 | */ |
633 | static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, |
634 | struct ncsi_cmd_arg *nca) |
635 | { |
636 | struct ncsi_channel_vlan_filter *ncf; |
637 | struct vlan_vid *vlan = NULL; |
638 | unsigned long flags; |
639 | int i, index; |
640 | void *bitmap; |
641 | u16 vid; |
642 | |
643 | if (list_empty(head: &ndp->vlan_vids)) |
644 | return -1; |
645 | |
646 | ncf = &nc->vlan_filter; |
647 | bitmap = &ncf->bitmap; |
648 | |
649 | spin_lock_irqsave(&nc->lock, flags); |
650 | |
651 | rcu_read_lock(); |
652 | list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { |
653 | vid = vlan->vid; |
654 | for (i = 0; i < ncf->n_vids; i++) |
655 | if (ncf->vids[i] == vid) { |
656 | vid = 0; |
657 | break; |
658 | } |
659 | if (vid) |
660 | break; |
661 | } |
662 | rcu_read_unlock(); |
663 | |
664 | if (!vid) { |
665 | /* No VLAN ID is not set */ |
666 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
667 | return -1; |
668 | } |
669 | |
670 | index = find_first_zero_bit(addr: bitmap, size: ncf->n_vids); |
671 | if (index < 0 || index >= ncf->n_vids) { |
672 | netdev_err(dev: ndp->ndev.dev, |
673 | format: "Channel %u already has all VLAN filters set\n" , |
674 | nc->id); |
675 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
676 | return -1; |
677 | } |
678 | |
679 | ncf->vids[index] = vid; |
680 | set_bit(nr: index, addr: bitmap); |
681 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
682 | |
683 | nca->type = NCSI_PKT_CMD_SVF; |
684 | nca->words[1] = vid; |
685 | /* HW filter index starts at 1 */ |
686 | nca->bytes[6] = index + 1; |
687 | nca->bytes[7] = 0x01; |
688 | |
689 | return 0; |
690 | } |
691 | |
692 | static int ncsi_oem_keep_phy_intel(struct ncsi_cmd_arg *nca) |
693 | { |
694 | unsigned char data[NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN]; |
695 | int ret = 0; |
696 | |
697 | nca->payload = NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN; |
698 | |
699 | memset(data, 0, NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN); |
700 | *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); |
701 | |
702 | data[4] = NCSI_OEM_INTEL_CMD_KEEP_PHY; |
703 | |
704 | /* PHY Link up attribute */ |
705 | data[6] = 0x1; |
706 | |
707 | nca->data = data; |
708 | |
709 | ret = ncsi_xmit_cmd(nca); |
710 | if (ret) |
711 | netdev_err(dev: nca->ndp->ndev.dev, |
712 | format: "NCSI: Failed to transmit cmd 0x%x during configure\n" , |
713 | nca->type); |
714 | return ret; |
715 | } |
716 | |
717 | /* NCSI OEM Command APIs */ |
718 | static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca) |
719 | { |
720 | unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN]; |
721 | int ret = 0; |
722 | |
723 | nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN; |
724 | |
725 | memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN); |
726 | *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_BCM_ID); |
727 | data[5] = NCSI_OEM_BCM_CMD_GMA; |
728 | |
729 | nca->data = data; |
730 | |
731 | ret = ncsi_xmit_cmd(nca); |
732 | if (ret) |
733 | netdev_err(dev: nca->ndp->ndev.dev, |
734 | format: "NCSI: Failed to transmit cmd 0x%x during configure\n" , |
735 | nca->type); |
736 | return ret; |
737 | } |
738 | |
739 | static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca) |
740 | { |
741 | union { |
742 | u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN]; |
743 | u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)]; |
744 | } u; |
745 | int ret = 0; |
746 | |
747 | nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN; |
748 | |
749 | memset(&u, 0, sizeof(u)); |
750 | u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); |
751 | u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA; |
752 | u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM; |
753 | |
754 | nca->data = u.data_u8; |
755 | |
756 | ret = ncsi_xmit_cmd(nca); |
757 | if (ret) |
758 | netdev_err(dev: nca->ndp->ndev.dev, |
759 | format: "NCSI: Failed to transmit cmd 0x%x during configure\n" , |
760 | nca->type); |
761 | return ret; |
762 | } |
763 | |
764 | static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca) |
765 | { |
766 | union { |
767 | u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN]; |
768 | u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)]; |
769 | } u; |
770 | int ret = 0; |
771 | |
772 | memset(&u, 0, sizeof(u)); |
773 | u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); |
774 | u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF; |
775 | u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM; |
776 | memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET], |
777 | nca->ndp->ndev.dev->dev_addr, ETH_ALEN); |
778 | u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] = |
779 | (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT); |
780 | |
781 | nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN; |
782 | nca->data = u.data_u8; |
783 | |
784 | ret = ncsi_xmit_cmd(nca); |
785 | if (ret) |
786 | netdev_err(dev: nca->ndp->ndev.dev, |
787 | format: "NCSI: Failed to transmit cmd 0x%x during probe\n" , |
788 | nca->type); |
789 | return ret; |
790 | } |
791 | |
792 | static int ncsi_oem_gma_handler_intel(struct ncsi_cmd_arg *nca) |
793 | { |
794 | unsigned char data[NCSI_OEM_INTEL_CMD_GMA_LEN]; |
795 | int ret = 0; |
796 | |
797 | nca->payload = NCSI_OEM_INTEL_CMD_GMA_LEN; |
798 | |
799 | memset(data, 0, NCSI_OEM_INTEL_CMD_GMA_LEN); |
800 | *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); |
801 | data[4] = NCSI_OEM_INTEL_CMD_GMA; |
802 | |
803 | nca->data = data; |
804 | |
805 | ret = ncsi_xmit_cmd(nca); |
806 | if (ret) |
807 | netdev_err(dev: nca->ndp->ndev.dev, |
808 | format: "NCSI: Failed to transmit cmd 0x%x during configure\n" , |
809 | nca->type); |
810 | |
811 | return ret; |
812 | } |
813 | |
814 | /* OEM Command handlers initialization */ |
815 | static struct ncsi_oem_gma_handler { |
816 | unsigned int mfr_id; |
817 | int (*handler)(struct ncsi_cmd_arg *nca); |
818 | } ncsi_oem_gma_handlers[] = { |
819 | { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm }, |
820 | { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }, |
821 | { NCSI_OEM_MFR_INTEL_ID, ncsi_oem_gma_handler_intel } |
822 | }; |
823 | |
824 | static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id) |
825 | { |
826 | struct ncsi_oem_gma_handler *nch = NULL; |
827 | int i; |
828 | |
829 | /* This function should only be called once, return if flag set */ |
830 | if (nca->ndp->gma_flag == 1) |
831 | return -1; |
832 | |
833 | /* Find gma handler for given manufacturer id */ |
834 | for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) { |
835 | if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) { |
836 | if (ncsi_oem_gma_handlers[i].handler) |
837 | nch = &ncsi_oem_gma_handlers[i]; |
838 | break; |
839 | } |
840 | } |
841 | |
842 | if (!nch) { |
843 | netdev_err(dev: nca->ndp->ndev.dev, |
844 | format: "NCSI: No GMA handler available for MFR-ID (0x%x)\n" , |
845 | mf_id); |
846 | return -1; |
847 | } |
848 | |
849 | /* Get Mac address from NCSI device */ |
850 | return nch->handler(nca); |
851 | } |
852 | |
853 | /* Determine if a given channel from the channel_queue should be used for Tx */ |
854 | static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp, |
855 | struct ncsi_channel *nc) |
856 | { |
857 | struct ncsi_channel_mode *ncm; |
858 | struct ncsi_channel *channel; |
859 | struct ncsi_package *np; |
860 | |
861 | /* Check if any other channel has Tx enabled; a channel may have already |
862 | * been configured and removed from the channel queue. |
863 | */ |
864 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
865 | if (!ndp->multi_package && np != nc->package) |
866 | continue; |
867 | NCSI_FOR_EACH_CHANNEL(np, channel) { |
868 | ncm = &channel->modes[NCSI_MODE_TX_ENABLE]; |
869 | if (ncm->enable) |
870 | return false; |
871 | } |
872 | } |
873 | |
874 | /* This channel is the preferred channel and has link */ |
875 | list_for_each_entry_rcu(channel, &ndp->channel_queue, link) { |
876 | np = channel->package; |
877 | if (np->preferred_channel && |
878 | ncsi_channel_has_link(channel: np->preferred_channel)) { |
879 | return np->preferred_channel == nc; |
880 | } |
881 | } |
882 | |
883 | /* This channel has link */ |
884 | if (ncsi_channel_has_link(channel: nc)) |
885 | return true; |
886 | |
887 | list_for_each_entry_rcu(channel, &ndp->channel_queue, link) |
888 | if (ncsi_channel_has_link(channel)) |
889 | return false; |
890 | |
891 | /* No other channel has link; default to this one */ |
892 | return true; |
893 | } |
894 | |
895 | /* Change the active Tx channel in a multi-channel setup */ |
896 | int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp, |
897 | struct ncsi_package *package, |
898 | struct ncsi_channel *disable, |
899 | struct ncsi_channel *enable) |
900 | { |
901 | struct ncsi_cmd_arg nca; |
902 | struct ncsi_channel *nc; |
903 | struct ncsi_package *np; |
904 | int ret = 0; |
905 | |
906 | if (!package->multi_channel && !ndp->multi_package) |
907 | netdev_warn(dev: ndp->ndev.dev, |
908 | format: "NCSI: Trying to update Tx channel in single-channel mode\n" ); |
909 | nca.ndp = ndp; |
910 | nca.req_flags = 0; |
911 | |
912 | /* Find current channel with Tx enabled */ |
913 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
914 | if (disable) |
915 | break; |
916 | if (!ndp->multi_package && np != package) |
917 | continue; |
918 | |
919 | NCSI_FOR_EACH_CHANNEL(np, nc) |
920 | if (nc->modes[NCSI_MODE_TX_ENABLE].enable) { |
921 | disable = nc; |
922 | break; |
923 | } |
924 | } |
925 | |
926 | /* Find a suitable channel for Tx */ |
927 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
928 | if (enable) |
929 | break; |
930 | if (!ndp->multi_package && np != package) |
931 | continue; |
932 | if (!(ndp->package_whitelist & (0x1 << np->id))) |
933 | continue; |
934 | |
935 | if (np->preferred_channel && |
936 | ncsi_channel_has_link(channel: np->preferred_channel)) { |
937 | enable = np->preferred_channel; |
938 | break; |
939 | } |
940 | |
941 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
942 | if (!(np->channel_whitelist & 0x1 << nc->id)) |
943 | continue; |
944 | if (nc->state != NCSI_CHANNEL_ACTIVE) |
945 | continue; |
946 | if (ncsi_channel_has_link(channel: nc)) { |
947 | enable = nc; |
948 | break; |
949 | } |
950 | } |
951 | } |
952 | |
953 | if (disable == enable) |
954 | return -1; |
955 | |
956 | if (!enable) |
957 | return -1; |
958 | |
959 | if (disable) { |
960 | nca.channel = disable->id; |
961 | nca.package = disable->package->id; |
962 | nca.type = NCSI_PKT_CMD_DCNT; |
963 | ret = ncsi_xmit_cmd(nca: &nca); |
964 | if (ret) |
965 | netdev_err(dev: ndp->ndev.dev, |
966 | format: "Error %d sending DCNT\n" , |
967 | ret); |
968 | } |
969 | |
970 | netdev_info(dev: ndp->ndev.dev, format: "NCSI: channel %u enables Tx\n" , enable->id); |
971 | |
972 | nca.channel = enable->id; |
973 | nca.package = enable->package->id; |
974 | nca.type = NCSI_PKT_CMD_ECNT; |
975 | ret = ncsi_xmit_cmd(nca: &nca); |
976 | if (ret) |
977 | netdev_err(dev: ndp->ndev.dev, |
978 | format: "Error %d sending ECNT\n" , |
979 | ret); |
980 | |
981 | return ret; |
982 | } |
983 | |
984 | static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) |
985 | { |
986 | struct ncsi_package *np = ndp->active_package; |
987 | struct ncsi_channel *nc = ndp->active_channel; |
988 | struct ncsi_channel *hot_nc = NULL; |
989 | struct ncsi_dev *nd = &ndp->ndev; |
990 | struct net_device *dev = nd->dev; |
991 | struct ncsi_cmd_arg nca; |
992 | unsigned char index; |
993 | unsigned long flags; |
994 | int ret; |
995 | |
996 | nca.ndp = ndp; |
997 | nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; |
998 | switch (nd->state) { |
999 | case ncsi_dev_state_config: |
1000 | case ncsi_dev_state_config_sp: |
1001 | ndp->pending_req_num = 1; |
1002 | |
1003 | /* Select the specific package */ |
1004 | nca.type = NCSI_PKT_CMD_SP; |
1005 | if (ndp->flags & NCSI_DEV_HWA) |
1006 | nca.bytes[0] = 0; |
1007 | else |
1008 | nca.bytes[0] = 1; |
1009 | nca.package = np->id; |
1010 | nca.channel = NCSI_RESERVED_CHANNEL; |
1011 | ret = ncsi_xmit_cmd(nca: &nca); |
1012 | if (ret) { |
1013 | netdev_err(dev: ndp->ndev.dev, |
1014 | format: "NCSI: Failed to transmit CMD_SP\n" ); |
1015 | goto error; |
1016 | } |
1017 | |
1018 | nd->state = ncsi_dev_state_config_cis; |
1019 | break; |
1020 | case ncsi_dev_state_config_cis: |
1021 | ndp->pending_req_num = 1; |
1022 | |
1023 | /* Clear initial state */ |
1024 | nca.type = NCSI_PKT_CMD_CIS; |
1025 | nca.package = np->id; |
1026 | nca.channel = nc->id; |
1027 | ret = ncsi_xmit_cmd(nca: &nca); |
1028 | if (ret) { |
1029 | netdev_err(dev: ndp->ndev.dev, |
1030 | format: "NCSI: Failed to transmit CMD_CIS\n" ); |
1031 | goto error; |
1032 | } |
1033 | |
1034 | nd->state = IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) |
1035 | ? ncsi_dev_state_config_oem_gma |
1036 | : ncsi_dev_state_config_clear_vids; |
1037 | break; |
1038 | case ncsi_dev_state_config_oem_gma: |
1039 | nd->state = ncsi_dev_state_config_clear_vids; |
1040 | |
1041 | nca.package = np->id; |
1042 | nca.channel = nc->id; |
1043 | ndp->pending_req_num = 1; |
1044 | if (nc->version.major >= 1 && nc->version.minor >= 2) { |
1045 | nca.type = NCSI_PKT_CMD_GMCMA; |
1046 | ret = ncsi_xmit_cmd(nca: &nca); |
1047 | } else { |
1048 | nca.type = NCSI_PKT_CMD_OEM; |
1049 | ret = ncsi_gma_handler(nca: &nca, mf_id: nc->version.mf_id); |
1050 | } |
1051 | if (ret < 0) |
1052 | schedule_work(work: &ndp->work); |
1053 | |
1054 | break; |
1055 | case ncsi_dev_state_config_clear_vids: |
1056 | case ncsi_dev_state_config_svf: |
1057 | case ncsi_dev_state_config_ev: |
1058 | case ncsi_dev_state_config_sma: |
1059 | case ncsi_dev_state_config_ebf: |
1060 | case ncsi_dev_state_config_dgmf: |
1061 | case ncsi_dev_state_config_ecnt: |
1062 | case ncsi_dev_state_config_ec: |
1063 | case ncsi_dev_state_config_ae: |
1064 | case ncsi_dev_state_config_gls: |
1065 | ndp->pending_req_num = 1; |
1066 | |
1067 | nca.package = np->id; |
1068 | nca.channel = nc->id; |
1069 | |
1070 | /* Clear any active filters on the channel before setting */ |
1071 | if (nd->state == ncsi_dev_state_config_clear_vids) { |
1072 | ret = clear_one_vid(ndp, nc, nca: &nca); |
1073 | if (ret) { |
1074 | nd->state = ncsi_dev_state_config_svf; |
1075 | schedule_work(work: &ndp->work); |
1076 | break; |
1077 | } |
1078 | /* Repeat */ |
1079 | nd->state = ncsi_dev_state_config_clear_vids; |
1080 | /* Add known VLAN tags to the filter */ |
1081 | } else if (nd->state == ncsi_dev_state_config_svf) { |
1082 | ret = set_one_vid(ndp, nc, nca: &nca); |
1083 | if (ret) { |
1084 | nd->state = ncsi_dev_state_config_ev; |
1085 | schedule_work(work: &ndp->work); |
1086 | break; |
1087 | } |
1088 | /* Repeat */ |
1089 | nd->state = ncsi_dev_state_config_svf; |
1090 | /* Enable/Disable the VLAN filter */ |
1091 | } else if (nd->state == ncsi_dev_state_config_ev) { |
1092 | if (list_empty(head: &ndp->vlan_vids)) { |
1093 | nca.type = NCSI_PKT_CMD_DV; |
1094 | } else { |
1095 | nca.type = NCSI_PKT_CMD_EV; |
1096 | nca.bytes[3] = NCSI_CAP_VLAN_NO; |
1097 | } |
1098 | nd->state = ncsi_dev_state_config_sma; |
1099 | } else if (nd->state == ncsi_dev_state_config_sma) { |
1100 | /* Use first entry in unicast filter table. Note that |
1101 | * the MAC filter table starts from entry 1 instead of |
1102 | * 0. |
1103 | */ |
1104 | nca.type = NCSI_PKT_CMD_SMA; |
1105 | for (index = 0; index < 6; index++) |
1106 | nca.bytes[index] = dev->dev_addr[index]; |
1107 | nca.bytes[6] = 0x1; |
1108 | nca.bytes[7] = 0x1; |
1109 | nd->state = ncsi_dev_state_config_ebf; |
1110 | } else if (nd->state == ncsi_dev_state_config_ebf) { |
1111 | nca.type = NCSI_PKT_CMD_EBF; |
1112 | nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap; |
1113 | /* if multicast global filtering is supported then |
1114 | * disable it so that all multicast packet will be |
1115 | * forwarded to management controller |
1116 | */ |
1117 | if (nc->caps[NCSI_CAP_GENERIC].cap & |
1118 | NCSI_CAP_GENERIC_MC) |
1119 | nd->state = ncsi_dev_state_config_dgmf; |
1120 | else if (ncsi_channel_is_tx(ndp, nc)) |
1121 | nd->state = ncsi_dev_state_config_ecnt; |
1122 | else |
1123 | nd->state = ncsi_dev_state_config_ec; |
1124 | } else if (nd->state == ncsi_dev_state_config_dgmf) { |
1125 | nca.type = NCSI_PKT_CMD_DGMF; |
1126 | if (ncsi_channel_is_tx(ndp, nc)) |
1127 | nd->state = ncsi_dev_state_config_ecnt; |
1128 | else |
1129 | nd->state = ncsi_dev_state_config_ec; |
1130 | } else if (nd->state == ncsi_dev_state_config_ecnt) { |
1131 | if (np->preferred_channel && |
1132 | nc != np->preferred_channel) |
1133 | netdev_info(dev: ndp->ndev.dev, |
1134 | format: "NCSI: Tx failed over to channel %u\n" , |
1135 | nc->id); |
1136 | nca.type = NCSI_PKT_CMD_ECNT; |
1137 | nd->state = ncsi_dev_state_config_ec; |
1138 | } else if (nd->state == ncsi_dev_state_config_ec) { |
1139 | /* Enable AEN if it's supported */ |
1140 | nca.type = NCSI_PKT_CMD_EC; |
1141 | nd->state = ncsi_dev_state_config_ae; |
1142 | if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK)) |
1143 | nd->state = ncsi_dev_state_config_gls; |
1144 | } else if (nd->state == ncsi_dev_state_config_ae) { |
1145 | nca.type = NCSI_PKT_CMD_AE; |
1146 | nca.bytes[0] = 0; |
1147 | nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap; |
1148 | nd->state = ncsi_dev_state_config_gls; |
1149 | } else if (nd->state == ncsi_dev_state_config_gls) { |
1150 | nca.type = NCSI_PKT_CMD_GLS; |
1151 | nd->state = ncsi_dev_state_config_done; |
1152 | } |
1153 | |
1154 | ret = ncsi_xmit_cmd(nca: &nca); |
1155 | if (ret) { |
1156 | netdev_err(dev: ndp->ndev.dev, |
1157 | format: "NCSI: Failed to transmit CMD %x\n" , |
1158 | nca.type); |
1159 | goto error; |
1160 | } |
1161 | break; |
1162 | case ncsi_dev_state_config_done: |
1163 | netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n" , |
1164 | nc->id); |
1165 | spin_lock_irqsave(&nc->lock, flags); |
1166 | nc->state = NCSI_CHANNEL_ACTIVE; |
1167 | |
1168 | if (ndp->flags & NCSI_DEV_RESET) { |
1169 | /* A reset event happened during config, start it now */ |
1170 | nc->reconfigure_needed = false; |
1171 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1172 | ncsi_reset_dev(nd); |
1173 | break; |
1174 | } |
1175 | |
1176 | if (nc->reconfigure_needed) { |
1177 | /* This channel's configuration has been updated |
1178 | * part-way during the config state - start the |
1179 | * channel configuration over |
1180 | */ |
1181 | nc->reconfigure_needed = false; |
1182 | nc->state = NCSI_CHANNEL_INACTIVE; |
1183 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1184 | |
1185 | spin_lock_irqsave(&ndp->lock, flags); |
1186 | list_add_tail_rcu(new: &nc->link, head: &ndp->channel_queue); |
1187 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1188 | |
1189 | netdev_dbg(dev, "Dirty NCSI channel state reset\n" ); |
1190 | ncsi_process_next_channel(ndp); |
1191 | break; |
1192 | } |
1193 | |
1194 | if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { |
1195 | hot_nc = nc; |
1196 | } else { |
1197 | hot_nc = NULL; |
1198 | netdev_dbg(ndp->ndev.dev, |
1199 | "NCSI: channel %u link down after config\n" , |
1200 | nc->id); |
1201 | } |
1202 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1203 | |
1204 | /* Update the hot channel */ |
1205 | spin_lock_irqsave(&ndp->lock, flags); |
1206 | ndp->hot_channel = hot_nc; |
1207 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1208 | |
1209 | ncsi_start_channel_monitor(nc); |
1210 | ncsi_process_next_channel(ndp); |
1211 | break; |
1212 | default: |
1213 | netdev_alert(dev, format: "Wrong NCSI state 0x%x in config\n" , |
1214 | nd->state); |
1215 | } |
1216 | |
1217 | return; |
1218 | |
1219 | error: |
1220 | ncsi_report_link(ndp, force_down: true); |
1221 | } |
1222 | |
1223 | static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp) |
1224 | { |
1225 | struct ncsi_channel *nc, *found, *hot_nc; |
1226 | struct ncsi_channel_mode *ncm; |
1227 | unsigned long flags, cflags; |
1228 | struct ncsi_package *np; |
1229 | bool with_link; |
1230 | |
1231 | spin_lock_irqsave(&ndp->lock, flags); |
1232 | hot_nc = ndp->hot_channel; |
1233 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1234 | |
1235 | /* By default the search is done once an inactive channel with up |
1236 | * link is found, unless a preferred channel is set. |
1237 | * If multi_package or multi_channel are configured all channels in the |
1238 | * whitelist are added to the channel queue. |
1239 | */ |
1240 | found = NULL; |
1241 | with_link = false; |
1242 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
1243 | if (!(ndp->package_whitelist & (0x1 << np->id))) |
1244 | continue; |
1245 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
1246 | if (!(np->channel_whitelist & (0x1 << nc->id))) |
1247 | continue; |
1248 | |
1249 | spin_lock_irqsave(&nc->lock, cflags); |
1250 | |
1251 | if (!list_empty(head: &nc->link) || |
1252 | nc->state != NCSI_CHANNEL_INACTIVE) { |
1253 | spin_unlock_irqrestore(lock: &nc->lock, flags: cflags); |
1254 | continue; |
1255 | } |
1256 | |
1257 | if (!found) |
1258 | found = nc; |
1259 | |
1260 | if (nc == hot_nc) |
1261 | found = nc; |
1262 | |
1263 | ncm = &nc->modes[NCSI_MODE_LINK]; |
1264 | if (ncm->data[2] & 0x1) { |
1265 | found = nc; |
1266 | with_link = true; |
1267 | } |
1268 | |
1269 | /* If multi_channel is enabled configure all valid |
1270 | * channels whether or not they currently have link |
1271 | * so they will have AENs enabled. |
1272 | */ |
1273 | if (with_link || np->multi_channel) { |
1274 | spin_lock_irqsave(&ndp->lock, flags); |
1275 | list_add_tail_rcu(new: &nc->link, |
1276 | head: &ndp->channel_queue); |
1277 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1278 | |
1279 | netdev_dbg(ndp->ndev.dev, |
1280 | "NCSI: Channel %u added to queue (link %s)\n" , |
1281 | nc->id, |
1282 | ncm->data[2] & 0x1 ? "up" : "down" ); |
1283 | } |
1284 | |
1285 | spin_unlock_irqrestore(lock: &nc->lock, flags: cflags); |
1286 | |
1287 | if (with_link && !np->multi_channel) |
1288 | break; |
1289 | } |
1290 | if (with_link && !ndp->multi_package) |
1291 | break; |
1292 | } |
1293 | |
1294 | if (list_empty(head: &ndp->channel_queue) && found) { |
1295 | netdev_info(dev: ndp->ndev.dev, |
1296 | format: "NCSI: No channel with link found, configuring channel %u\n" , |
1297 | found->id); |
1298 | spin_lock_irqsave(&ndp->lock, flags); |
1299 | list_add_tail_rcu(new: &found->link, head: &ndp->channel_queue); |
1300 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1301 | } else if (!found) { |
1302 | netdev_warn(dev: ndp->ndev.dev, |
1303 | format: "NCSI: No channel found to configure!\n" ); |
1304 | ncsi_report_link(ndp, force_down: true); |
1305 | return -ENODEV; |
1306 | } |
1307 | |
1308 | return ncsi_process_next_channel(ndp); |
1309 | } |
1310 | |
1311 | static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) |
1312 | { |
1313 | struct ncsi_package *np; |
1314 | struct ncsi_channel *nc; |
1315 | unsigned int cap; |
1316 | bool has_channel = false; |
1317 | |
1318 | /* The hardware arbitration is disabled if any one channel |
1319 | * doesn't support explicitly. |
1320 | */ |
1321 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
1322 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
1323 | has_channel = true; |
1324 | |
1325 | cap = nc->caps[NCSI_CAP_GENERIC].cap; |
1326 | if (!(cap & NCSI_CAP_GENERIC_HWA) || |
1327 | (cap & NCSI_CAP_GENERIC_HWA_MASK) != |
1328 | NCSI_CAP_GENERIC_HWA_SUPPORT) { |
1329 | ndp->flags &= ~NCSI_DEV_HWA; |
1330 | return false; |
1331 | } |
1332 | } |
1333 | } |
1334 | |
1335 | if (has_channel) { |
1336 | ndp->flags |= NCSI_DEV_HWA; |
1337 | return true; |
1338 | } |
1339 | |
1340 | ndp->flags &= ~NCSI_DEV_HWA; |
1341 | return false; |
1342 | } |
1343 | |
1344 | static void ncsi_probe_channel(struct ncsi_dev_priv *ndp) |
1345 | { |
1346 | struct ncsi_dev *nd = &ndp->ndev; |
1347 | struct ncsi_package *np; |
1348 | struct ncsi_channel *nc; |
1349 | struct ncsi_cmd_arg nca; |
1350 | unsigned char index; |
1351 | int ret; |
1352 | |
1353 | nca.ndp = ndp; |
1354 | nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; |
1355 | switch (nd->state) { |
1356 | case ncsi_dev_state_probe: |
1357 | nd->state = ncsi_dev_state_probe_deselect; |
1358 | fallthrough; |
1359 | case ncsi_dev_state_probe_deselect: |
1360 | ndp->pending_req_num = 8; |
1361 | |
1362 | /* Deselect all possible packages */ |
1363 | nca.type = NCSI_PKT_CMD_DP; |
1364 | nca.channel = NCSI_RESERVED_CHANNEL; |
1365 | for (index = 0; index < 8; index++) { |
1366 | nca.package = index; |
1367 | ret = ncsi_xmit_cmd(nca: &nca); |
1368 | if (ret) |
1369 | goto error; |
1370 | } |
1371 | |
1372 | nd->state = ncsi_dev_state_probe_package; |
1373 | break; |
1374 | case ncsi_dev_state_probe_package: |
1375 | ndp->pending_req_num = 1; |
1376 | |
1377 | nca.type = NCSI_PKT_CMD_SP; |
1378 | nca.bytes[0] = 1; |
1379 | nca.package = ndp->package_probe_id; |
1380 | nca.channel = NCSI_RESERVED_CHANNEL; |
1381 | ret = ncsi_xmit_cmd(nca: &nca); |
1382 | if (ret) |
1383 | goto error; |
1384 | nd->state = ncsi_dev_state_probe_channel; |
1385 | break; |
1386 | case ncsi_dev_state_probe_channel: |
1387 | ndp->active_package = ncsi_find_package(ndp, |
1388 | id: ndp->package_probe_id); |
1389 | if (!ndp->active_package) { |
1390 | /* No response */ |
1391 | nd->state = ncsi_dev_state_probe_dp; |
1392 | schedule_work(work: &ndp->work); |
1393 | break; |
1394 | } |
1395 | nd->state = ncsi_dev_state_probe_cis; |
1396 | if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) && |
1397 | ndp->mlx_multi_host) |
1398 | nd->state = ncsi_dev_state_probe_mlx_gma; |
1399 | |
1400 | schedule_work(work: &ndp->work); |
1401 | break; |
1402 | case ncsi_dev_state_probe_mlx_gma: |
1403 | ndp->pending_req_num = 1; |
1404 | |
1405 | nca.type = NCSI_PKT_CMD_OEM; |
1406 | nca.package = ndp->active_package->id; |
1407 | nca.channel = 0; |
1408 | ret = ncsi_oem_gma_handler_mlx(nca: &nca); |
1409 | if (ret) |
1410 | goto error; |
1411 | |
1412 | nd->state = ncsi_dev_state_probe_mlx_smaf; |
1413 | break; |
1414 | case ncsi_dev_state_probe_mlx_smaf: |
1415 | ndp->pending_req_num = 1; |
1416 | |
1417 | nca.type = NCSI_PKT_CMD_OEM; |
1418 | nca.package = ndp->active_package->id; |
1419 | nca.channel = 0; |
1420 | ret = ncsi_oem_smaf_mlx(nca: &nca); |
1421 | if (ret) |
1422 | goto error; |
1423 | |
1424 | nd->state = ncsi_dev_state_probe_cis; |
1425 | break; |
1426 | case ncsi_dev_state_probe_cis: |
1427 | ndp->pending_req_num = NCSI_RESERVED_CHANNEL; |
1428 | |
1429 | /* Clear initial state */ |
1430 | nca.type = NCSI_PKT_CMD_CIS; |
1431 | nca.package = ndp->active_package->id; |
1432 | for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) { |
1433 | nca.channel = index; |
1434 | ret = ncsi_xmit_cmd(nca: &nca); |
1435 | if (ret) |
1436 | goto error; |
1437 | } |
1438 | |
1439 | nd->state = ncsi_dev_state_probe_gvi; |
1440 | if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY)) |
1441 | nd->state = ncsi_dev_state_probe_keep_phy; |
1442 | break; |
1443 | case ncsi_dev_state_probe_keep_phy: |
1444 | ndp->pending_req_num = 1; |
1445 | |
1446 | nca.type = NCSI_PKT_CMD_OEM; |
1447 | nca.package = ndp->active_package->id; |
1448 | nca.channel = 0; |
1449 | ret = ncsi_oem_keep_phy_intel(nca: &nca); |
1450 | if (ret) |
1451 | goto error; |
1452 | |
1453 | nd->state = ncsi_dev_state_probe_gvi; |
1454 | break; |
1455 | case ncsi_dev_state_probe_gvi: |
1456 | case ncsi_dev_state_probe_gc: |
1457 | case ncsi_dev_state_probe_gls: |
1458 | np = ndp->active_package; |
1459 | ndp->pending_req_num = np->channel_num; |
1460 | |
1461 | /* Retrieve version, capability or link status */ |
1462 | if (nd->state == ncsi_dev_state_probe_gvi) |
1463 | nca.type = NCSI_PKT_CMD_GVI; |
1464 | else if (nd->state == ncsi_dev_state_probe_gc) |
1465 | nca.type = NCSI_PKT_CMD_GC; |
1466 | else |
1467 | nca.type = NCSI_PKT_CMD_GLS; |
1468 | |
1469 | nca.package = np->id; |
1470 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
1471 | nca.channel = nc->id; |
1472 | ret = ncsi_xmit_cmd(nca: &nca); |
1473 | if (ret) |
1474 | goto error; |
1475 | } |
1476 | |
1477 | if (nd->state == ncsi_dev_state_probe_gvi) |
1478 | nd->state = ncsi_dev_state_probe_gc; |
1479 | else if (nd->state == ncsi_dev_state_probe_gc) |
1480 | nd->state = ncsi_dev_state_probe_gls; |
1481 | else |
1482 | nd->state = ncsi_dev_state_probe_dp; |
1483 | break; |
1484 | case ncsi_dev_state_probe_dp: |
1485 | ndp->pending_req_num = 1; |
1486 | |
1487 | /* Deselect the current package */ |
1488 | nca.type = NCSI_PKT_CMD_DP; |
1489 | nca.package = ndp->package_probe_id; |
1490 | nca.channel = NCSI_RESERVED_CHANNEL; |
1491 | ret = ncsi_xmit_cmd(nca: &nca); |
1492 | if (ret) |
1493 | goto error; |
1494 | |
1495 | /* Probe next package */ |
1496 | ndp->package_probe_id++; |
1497 | if (ndp->package_probe_id >= 8) { |
1498 | /* Probe finished */ |
1499 | ndp->flags |= NCSI_DEV_PROBED; |
1500 | break; |
1501 | } |
1502 | nd->state = ncsi_dev_state_probe_package; |
1503 | ndp->active_package = NULL; |
1504 | break; |
1505 | default: |
1506 | netdev_warn(dev: nd->dev, format: "Wrong NCSI state 0x%0x in enumeration\n" , |
1507 | nd->state); |
1508 | } |
1509 | |
1510 | if (ndp->flags & NCSI_DEV_PROBED) { |
1511 | /* Check if all packages have HWA support */ |
1512 | ncsi_check_hwa(ndp); |
1513 | ncsi_choose_active_channel(ndp); |
1514 | } |
1515 | |
1516 | return; |
1517 | error: |
1518 | netdev_err(dev: ndp->ndev.dev, |
1519 | format: "NCSI: Failed to transmit cmd 0x%x during probe\n" , |
1520 | nca.type); |
1521 | ncsi_report_link(ndp, force_down: true); |
1522 | } |
1523 | |
1524 | static void ncsi_dev_work(struct work_struct *work) |
1525 | { |
1526 | struct ncsi_dev_priv *ndp = container_of(work, |
1527 | struct ncsi_dev_priv, work); |
1528 | struct ncsi_dev *nd = &ndp->ndev; |
1529 | |
1530 | switch (nd->state & ncsi_dev_state_major) { |
1531 | case ncsi_dev_state_probe: |
1532 | ncsi_probe_channel(ndp); |
1533 | break; |
1534 | case ncsi_dev_state_suspend: |
1535 | ncsi_suspend_channel(ndp); |
1536 | break; |
1537 | case ncsi_dev_state_config: |
1538 | ncsi_configure_channel(ndp); |
1539 | break; |
1540 | default: |
1541 | netdev_warn(dev: nd->dev, format: "Wrong NCSI state 0x%x in workqueue\n" , |
1542 | nd->state); |
1543 | } |
1544 | } |
1545 | |
1546 | int ncsi_process_next_channel(struct ncsi_dev_priv *ndp) |
1547 | { |
1548 | struct ncsi_channel *nc; |
1549 | int old_state; |
1550 | unsigned long flags; |
1551 | |
1552 | spin_lock_irqsave(&ndp->lock, flags); |
1553 | nc = list_first_or_null_rcu(&ndp->channel_queue, |
1554 | struct ncsi_channel, link); |
1555 | if (!nc) { |
1556 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1557 | goto out; |
1558 | } |
1559 | |
1560 | list_del_init(entry: &nc->link); |
1561 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1562 | |
1563 | spin_lock_irqsave(&nc->lock, flags); |
1564 | old_state = nc->state; |
1565 | nc->state = NCSI_CHANNEL_INVISIBLE; |
1566 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1567 | |
1568 | ndp->active_channel = nc; |
1569 | ndp->active_package = nc->package; |
1570 | |
1571 | switch (old_state) { |
1572 | case NCSI_CHANNEL_INACTIVE: |
1573 | ndp->ndev.state = ncsi_dev_state_config; |
1574 | netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n" , |
1575 | nc->id); |
1576 | ncsi_configure_channel(ndp); |
1577 | break; |
1578 | case NCSI_CHANNEL_ACTIVE: |
1579 | ndp->ndev.state = ncsi_dev_state_suspend; |
1580 | netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n" , |
1581 | nc->id); |
1582 | ncsi_suspend_channel(ndp); |
1583 | break; |
1584 | default: |
1585 | netdev_err(dev: ndp->ndev.dev, format: "Invalid state 0x%x on %d:%d\n" , |
1586 | old_state, nc->package->id, nc->id); |
1587 | ncsi_report_link(ndp, force_down: false); |
1588 | return -EINVAL; |
1589 | } |
1590 | |
1591 | return 0; |
1592 | |
1593 | out: |
1594 | ndp->active_channel = NULL; |
1595 | ndp->active_package = NULL; |
1596 | if (ndp->flags & NCSI_DEV_RESHUFFLE) { |
1597 | ndp->flags &= ~NCSI_DEV_RESHUFFLE; |
1598 | return ncsi_choose_active_channel(ndp); |
1599 | } |
1600 | |
1601 | ncsi_report_link(ndp, force_down: false); |
1602 | return -ENODEV; |
1603 | } |
1604 | |
1605 | static int ncsi_kick_channels(struct ncsi_dev_priv *ndp) |
1606 | { |
1607 | struct ncsi_dev *nd = &ndp->ndev; |
1608 | struct ncsi_channel *nc; |
1609 | struct ncsi_package *np; |
1610 | unsigned long flags; |
1611 | unsigned int n = 0; |
1612 | |
1613 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
1614 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
1615 | spin_lock_irqsave(&nc->lock, flags); |
1616 | |
1617 | /* Channels may be busy, mark dirty instead of |
1618 | * kicking if; |
1619 | * a) not ACTIVE (configured) |
1620 | * b) in the channel_queue (to be configured) |
1621 | * c) it's ndev is in the config state |
1622 | */ |
1623 | if (nc->state != NCSI_CHANNEL_ACTIVE) { |
1624 | if ((ndp->ndev.state & 0xff00) == |
1625 | ncsi_dev_state_config || |
1626 | !list_empty(head: &nc->link)) { |
1627 | netdev_dbg(nd->dev, |
1628 | "NCSI: channel %p marked dirty\n" , |
1629 | nc); |
1630 | nc->reconfigure_needed = true; |
1631 | } |
1632 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1633 | continue; |
1634 | } |
1635 | |
1636 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1637 | |
1638 | ncsi_stop_channel_monitor(nc); |
1639 | spin_lock_irqsave(&nc->lock, flags); |
1640 | nc->state = NCSI_CHANNEL_INACTIVE; |
1641 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1642 | |
1643 | spin_lock_irqsave(&ndp->lock, flags); |
1644 | list_add_tail_rcu(new: &nc->link, head: &ndp->channel_queue); |
1645 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1646 | |
1647 | netdev_dbg(nd->dev, "NCSI: kicked channel %p\n" , nc); |
1648 | n++; |
1649 | } |
1650 | } |
1651 | |
1652 | return n; |
1653 | } |
1654 | |
1655 | int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) |
1656 | { |
1657 | struct ncsi_dev_priv *ndp; |
1658 | unsigned int n_vids = 0; |
1659 | struct vlan_vid *vlan; |
1660 | struct ncsi_dev *nd; |
1661 | bool found = false; |
1662 | |
1663 | if (vid == 0) |
1664 | return 0; |
1665 | |
1666 | nd = ncsi_find_dev(dev); |
1667 | if (!nd) { |
1668 | netdev_warn(dev, format: "NCSI: No net_device?\n" ); |
1669 | return 0; |
1670 | } |
1671 | |
1672 | ndp = TO_NCSI_DEV_PRIV(nd); |
1673 | |
1674 | /* Add the VLAN id to our internal list */ |
1675 | list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { |
1676 | n_vids++; |
1677 | if (vlan->vid == vid) { |
1678 | netdev_dbg(dev, "NCSI: vid %u already registered\n" , |
1679 | vid); |
1680 | return 0; |
1681 | } |
1682 | } |
1683 | if (n_vids >= NCSI_MAX_VLAN_VIDS) { |
1684 | netdev_warn(dev, |
1685 | format: "tried to add vlan id %u but NCSI max already registered (%u)\n" , |
1686 | vid, NCSI_MAX_VLAN_VIDS); |
1687 | return -ENOSPC; |
1688 | } |
1689 | |
1690 | vlan = kzalloc(size: sizeof(*vlan), GFP_KERNEL); |
1691 | if (!vlan) |
1692 | return -ENOMEM; |
1693 | |
1694 | vlan->proto = proto; |
1695 | vlan->vid = vid; |
1696 | list_add_rcu(new: &vlan->list, head: &ndp->vlan_vids); |
1697 | |
1698 | netdev_dbg(dev, "NCSI: Added new vid %u\n" , vid); |
1699 | |
1700 | found = ncsi_kick_channels(ndp) != 0; |
1701 | |
1702 | return found ? ncsi_process_next_channel(ndp) : 0; |
1703 | } |
1704 | EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid); |
1705 | |
1706 | int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) |
1707 | { |
1708 | struct vlan_vid *vlan, *tmp; |
1709 | struct ncsi_dev_priv *ndp; |
1710 | struct ncsi_dev *nd; |
1711 | bool found = false; |
1712 | |
1713 | if (vid == 0) |
1714 | return 0; |
1715 | |
1716 | nd = ncsi_find_dev(dev); |
1717 | if (!nd) { |
1718 | netdev_warn(dev, format: "NCSI: no net_device?\n" ); |
1719 | return 0; |
1720 | } |
1721 | |
1722 | ndp = TO_NCSI_DEV_PRIV(nd); |
1723 | |
1724 | /* Remove the VLAN id from our internal list */ |
1725 | list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list) |
1726 | if (vlan->vid == vid) { |
1727 | netdev_dbg(dev, "NCSI: vid %u found, removing\n" , vid); |
1728 | list_del_rcu(entry: &vlan->list); |
1729 | found = true; |
1730 | kfree(objp: vlan); |
1731 | } |
1732 | |
1733 | if (!found) { |
1734 | netdev_err(dev, format: "NCSI: vid %u wasn't registered!\n" , vid); |
1735 | return -EINVAL; |
1736 | } |
1737 | |
1738 | found = ncsi_kick_channels(ndp) != 0; |
1739 | |
1740 | return found ? ncsi_process_next_channel(ndp) : 0; |
1741 | } |
1742 | EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid); |
1743 | |
1744 | struct ncsi_dev *ncsi_register_dev(struct net_device *dev, |
1745 | void (*handler)(struct ncsi_dev *ndev)) |
1746 | { |
1747 | struct ncsi_dev_priv *ndp; |
1748 | struct ncsi_dev *nd; |
1749 | struct platform_device *pdev; |
1750 | struct device_node *np; |
1751 | unsigned long flags; |
1752 | int i; |
1753 | |
1754 | /* Check if the device has been registered or not */ |
1755 | nd = ncsi_find_dev(dev); |
1756 | if (nd) |
1757 | return nd; |
1758 | |
1759 | /* Create NCSI device */ |
1760 | ndp = kzalloc(size: sizeof(*ndp), GFP_ATOMIC); |
1761 | if (!ndp) |
1762 | return NULL; |
1763 | |
1764 | nd = &ndp->ndev; |
1765 | nd->state = ncsi_dev_state_registered; |
1766 | nd->dev = dev; |
1767 | nd->handler = handler; |
1768 | ndp->pending_req_num = 0; |
1769 | INIT_LIST_HEAD(list: &ndp->channel_queue); |
1770 | INIT_LIST_HEAD(list: &ndp->vlan_vids); |
1771 | INIT_WORK(&ndp->work, ncsi_dev_work); |
1772 | ndp->package_whitelist = UINT_MAX; |
1773 | |
1774 | /* Initialize private NCSI device */ |
1775 | spin_lock_init(&ndp->lock); |
1776 | INIT_LIST_HEAD(list: &ndp->packages); |
1777 | ndp->request_id = NCSI_REQ_START_IDX; |
1778 | for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) { |
1779 | ndp->requests[i].id = i; |
1780 | ndp->requests[i].ndp = ndp; |
1781 | timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0); |
1782 | } |
1783 | |
1784 | spin_lock_irqsave(&ncsi_dev_lock, flags); |
1785 | list_add_tail_rcu(new: &ndp->node, head: &ncsi_dev_list); |
1786 | spin_unlock_irqrestore(lock: &ncsi_dev_lock, flags); |
1787 | |
1788 | /* Register NCSI packet Rx handler */ |
1789 | ndp->ptype.type = cpu_to_be16(ETH_P_NCSI); |
1790 | ndp->ptype.func = ncsi_rcv_rsp; |
1791 | ndp->ptype.dev = dev; |
1792 | dev_add_pack(pt: &ndp->ptype); |
1793 | |
1794 | pdev = to_platform_device(dev->dev.parent); |
1795 | if (pdev) { |
1796 | np = pdev->dev.of_node; |
1797 | if (np && (of_property_read_bool(np, propname: "mellanox,multi-host" ) || |
1798 | of_property_read_bool(np, propname: "mlx,multi-host" ))) |
1799 | ndp->mlx_multi_host = true; |
1800 | } |
1801 | |
1802 | return nd; |
1803 | } |
1804 | EXPORT_SYMBOL_GPL(ncsi_register_dev); |
1805 | |
1806 | int ncsi_start_dev(struct ncsi_dev *nd) |
1807 | { |
1808 | struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); |
1809 | |
1810 | if (nd->state != ncsi_dev_state_registered && |
1811 | nd->state != ncsi_dev_state_functional) |
1812 | return -ENOTTY; |
1813 | |
1814 | if (!(ndp->flags & NCSI_DEV_PROBED)) { |
1815 | ndp->package_probe_id = 0; |
1816 | nd->state = ncsi_dev_state_probe; |
1817 | schedule_work(work: &ndp->work); |
1818 | return 0; |
1819 | } |
1820 | |
1821 | return ncsi_reset_dev(nd); |
1822 | } |
1823 | EXPORT_SYMBOL_GPL(ncsi_start_dev); |
1824 | |
1825 | void ncsi_stop_dev(struct ncsi_dev *nd) |
1826 | { |
1827 | struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); |
1828 | struct ncsi_package *np; |
1829 | struct ncsi_channel *nc; |
1830 | bool chained; |
1831 | int old_state; |
1832 | unsigned long flags; |
1833 | |
1834 | /* Stop the channel monitor on any active channels. Don't reset the |
1835 | * channel state so we know which were active when ncsi_start_dev() |
1836 | * is next called. |
1837 | */ |
1838 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
1839 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
1840 | ncsi_stop_channel_monitor(nc); |
1841 | |
1842 | spin_lock_irqsave(&nc->lock, flags); |
1843 | chained = !list_empty(head: &nc->link); |
1844 | old_state = nc->state; |
1845 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1846 | |
1847 | WARN_ON_ONCE(chained || |
1848 | old_state == NCSI_CHANNEL_INVISIBLE); |
1849 | } |
1850 | } |
1851 | |
1852 | netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n" ); |
1853 | ncsi_report_link(ndp, force_down: true); |
1854 | } |
1855 | EXPORT_SYMBOL_GPL(ncsi_stop_dev); |
1856 | |
1857 | int ncsi_reset_dev(struct ncsi_dev *nd) |
1858 | { |
1859 | struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); |
1860 | struct ncsi_channel *nc, *active, *tmp; |
1861 | struct ncsi_package *np; |
1862 | unsigned long flags; |
1863 | |
1864 | spin_lock_irqsave(&ndp->lock, flags); |
1865 | |
1866 | if (!(ndp->flags & NCSI_DEV_RESET)) { |
1867 | /* Haven't been called yet, check states */ |
1868 | switch (nd->state & ncsi_dev_state_major) { |
1869 | case ncsi_dev_state_registered: |
1870 | case ncsi_dev_state_probe: |
1871 | /* Not even probed yet - do nothing */ |
1872 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1873 | return 0; |
1874 | case ncsi_dev_state_suspend: |
1875 | case ncsi_dev_state_config: |
1876 | /* Wait for the channel to finish its suspend/config |
1877 | * operation; once it finishes it will check for |
1878 | * NCSI_DEV_RESET and reset the state. |
1879 | */ |
1880 | ndp->flags |= NCSI_DEV_RESET; |
1881 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1882 | return 0; |
1883 | } |
1884 | } else { |
1885 | switch (nd->state) { |
1886 | case ncsi_dev_state_suspend_done: |
1887 | case ncsi_dev_state_config_done: |
1888 | case ncsi_dev_state_functional: |
1889 | /* Ok */ |
1890 | break; |
1891 | default: |
1892 | /* Current reset operation happening */ |
1893 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1894 | return 0; |
1895 | } |
1896 | } |
1897 | |
1898 | if (!list_empty(head: &ndp->channel_queue)) { |
1899 | /* Clear any channel queue we may have interrupted */ |
1900 | list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link) |
1901 | list_del_init(entry: &nc->link); |
1902 | } |
1903 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1904 | |
1905 | active = NULL; |
1906 | NCSI_FOR_EACH_PACKAGE(ndp, np) { |
1907 | NCSI_FOR_EACH_CHANNEL(np, nc) { |
1908 | spin_lock_irqsave(&nc->lock, flags); |
1909 | |
1910 | if (nc->state == NCSI_CHANNEL_ACTIVE) { |
1911 | active = nc; |
1912 | nc->state = NCSI_CHANNEL_INVISIBLE; |
1913 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1914 | ncsi_stop_channel_monitor(nc); |
1915 | break; |
1916 | } |
1917 | |
1918 | spin_unlock_irqrestore(lock: &nc->lock, flags); |
1919 | } |
1920 | if (active) |
1921 | break; |
1922 | } |
1923 | |
1924 | if (!active) { |
1925 | /* Done */ |
1926 | spin_lock_irqsave(&ndp->lock, flags); |
1927 | ndp->flags &= ~NCSI_DEV_RESET; |
1928 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1929 | return ncsi_choose_active_channel(ndp); |
1930 | } |
1931 | |
1932 | spin_lock_irqsave(&ndp->lock, flags); |
1933 | ndp->flags |= NCSI_DEV_RESET; |
1934 | ndp->active_channel = active; |
1935 | ndp->active_package = active->package; |
1936 | spin_unlock_irqrestore(lock: &ndp->lock, flags); |
1937 | |
1938 | nd->state = ncsi_dev_state_suspend; |
1939 | schedule_work(work: &ndp->work); |
1940 | return 0; |
1941 | } |
1942 | |
1943 | void ncsi_unregister_dev(struct ncsi_dev *nd) |
1944 | { |
1945 | struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); |
1946 | struct ncsi_package *np, *tmp; |
1947 | unsigned long flags; |
1948 | |
1949 | dev_remove_pack(pt: &ndp->ptype); |
1950 | |
1951 | list_for_each_entry_safe(np, tmp, &ndp->packages, node) |
1952 | ncsi_remove_package(np); |
1953 | |
1954 | spin_lock_irqsave(&ncsi_dev_lock, flags); |
1955 | list_del_rcu(entry: &ndp->node); |
1956 | spin_unlock_irqrestore(lock: &ncsi_dev_lock, flags); |
1957 | |
1958 | kfree(objp: ndp); |
1959 | } |
1960 | EXPORT_SYMBOL_GPL(ncsi_unregister_dev); |
1961 | |