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[mirror_ubuntu-disco-kernel.git] / net / ncsi / ncsi-manage.c
1 /*
2 * Copyright Gavin Shan, IBM Corporation 2016.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/netdevice.h>
14 #include <linux/skbuff.h>
15
16 #include <net/ncsi.h>
17 #include <net/net_namespace.h>
18 #include <net/sock.h>
19 #include <net/addrconf.h>
20 #include <net/ipv6.h>
21 #include <net/if_inet6.h>
22 #include <net/genetlink.h>
23
24 #include "internal.h"
25 #include "ncsi-pkt.h"
26 #include "ncsi-netlink.h"
27
28 LIST_HEAD(ncsi_dev_list);
29 DEFINE_SPINLOCK(ncsi_dev_lock);
30
31 bool ncsi_channel_has_link(struct ncsi_channel *channel)
32 {
33 return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1);
34 }
35
36 bool ncsi_channel_is_last(struct ncsi_dev_priv *ndp,
37 struct ncsi_channel *channel)
38 {
39 struct ncsi_package *np;
40 struct ncsi_channel *nc;
41
42 NCSI_FOR_EACH_PACKAGE(ndp, np)
43 NCSI_FOR_EACH_CHANNEL(np, nc) {
44 if (nc == channel)
45 continue;
46 if (nc->state == NCSI_CHANNEL_ACTIVE &&
47 ncsi_channel_has_link(nc))
48 return false;
49 }
50
51 return true;
52 }
53
54 static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down)
55 {
56 struct ncsi_dev *nd = &ndp->ndev;
57 struct ncsi_package *np;
58 struct ncsi_channel *nc;
59 unsigned long flags;
60
61 nd->state = ncsi_dev_state_functional;
62 if (force_down) {
63 nd->link_up = 0;
64 goto report;
65 }
66
67 nd->link_up = 0;
68 NCSI_FOR_EACH_PACKAGE(ndp, np) {
69 NCSI_FOR_EACH_CHANNEL(np, nc) {
70 spin_lock_irqsave(&nc->lock, flags);
71
72 if (!list_empty(&nc->link) ||
73 nc->state != NCSI_CHANNEL_ACTIVE) {
74 spin_unlock_irqrestore(&nc->lock, flags);
75 continue;
76 }
77
78 if (ncsi_channel_has_link(nc)) {
79 spin_unlock_irqrestore(&nc->lock, flags);
80 nd->link_up = 1;
81 goto report;
82 }
83
84 spin_unlock_irqrestore(&nc->lock, flags);
85 }
86 }
87
88 report:
89 nd->handler(nd);
90 }
91
92 static void ncsi_channel_monitor(struct timer_list *t)
93 {
94 struct ncsi_channel *nc = from_timer(nc, t, monitor.timer);
95 struct ncsi_package *np = nc->package;
96 struct ncsi_dev_priv *ndp = np->ndp;
97 struct ncsi_channel_mode *ncm;
98 struct ncsi_cmd_arg nca;
99 bool enabled, chained;
100 unsigned int monitor_state;
101 unsigned long flags;
102 int state, ret;
103
104 spin_lock_irqsave(&nc->lock, flags);
105 state = nc->state;
106 chained = !list_empty(&nc->link);
107 enabled = nc->monitor.enabled;
108 monitor_state = nc->monitor.state;
109 spin_unlock_irqrestore(&nc->lock, flags);
110
111 if (!enabled || chained) {
112 ncsi_stop_channel_monitor(nc);
113 return;
114 }
115 if (state != NCSI_CHANNEL_INACTIVE &&
116 state != NCSI_CHANNEL_ACTIVE) {
117 ncsi_stop_channel_monitor(nc);
118 return;
119 }
120
121 switch (monitor_state) {
122 case NCSI_CHANNEL_MONITOR_START:
123 case NCSI_CHANNEL_MONITOR_RETRY:
124 nca.ndp = ndp;
125 nca.package = np->id;
126 nca.channel = nc->id;
127 nca.type = NCSI_PKT_CMD_GLS;
128 nca.req_flags = 0;
129 ret = ncsi_xmit_cmd(&nca);
130 if (ret)
131 netdev_err(ndp->ndev.dev, "Error %d sending GLS\n",
132 ret);
133 break;
134 case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX:
135 break;
136 default:
137 netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n",
138 nc->id);
139 ncsi_report_link(ndp, true);
140 ndp->flags |= NCSI_DEV_RESHUFFLE;
141
142 ncsi_stop_channel_monitor(nc);
143
144 ncm = &nc->modes[NCSI_MODE_LINK];
145 spin_lock_irqsave(&nc->lock, flags);
146 nc->state = NCSI_CHANNEL_INVISIBLE;
147 ncm->data[2] &= ~0x1;
148 spin_unlock_irqrestore(&nc->lock, flags);
149
150 spin_lock_irqsave(&ndp->lock, flags);
151 nc->state = NCSI_CHANNEL_ACTIVE;
152 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
153 spin_unlock_irqrestore(&ndp->lock, flags);
154 ncsi_process_next_channel(ndp);
155 return;
156 }
157
158 spin_lock_irqsave(&nc->lock, flags);
159 nc->monitor.state++;
160 spin_unlock_irqrestore(&nc->lock, flags);
161 mod_timer(&nc->monitor.timer, jiffies + HZ);
162 }
163
164 void ncsi_start_channel_monitor(struct ncsi_channel *nc)
165 {
166 unsigned long flags;
167
168 spin_lock_irqsave(&nc->lock, flags);
169 WARN_ON_ONCE(nc->monitor.enabled);
170 nc->monitor.enabled = true;
171 nc->monitor.state = NCSI_CHANNEL_MONITOR_START;
172 spin_unlock_irqrestore(&nc->lock, flags);
173
174 mod_timer(&nc->monitor.timer, jiffies + HZ);
175 }
176
177 void ncsi_stop_channel_monitor(struct ncsi_channel *nc)
178 {
179 unsigned long flags;
180
181 spin_lock_irqsave(&nc->lock, flags);
182 if (!nc->monitor.enabled) {
183 spin_unlock_irqrestore(&nc->lock, flags);
184 return;
185 }
186 nc->monitor.enabled = false;
187 spin_unlock_irqrestore(&nc->lock, flags);
188
189 del_timer_sync(&nc->monitor.timer);
190 }
191
192 struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
193 unsigned char id)
194 {
195 struct ncsi_channel *nc;
196
197 NCSI_FOR_EACH_CHANNEL(np, nc) {
198 if (nc->id == id)
199 return nc;
200 }
201
202 return NULL;
203 }
204
205 struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id)
206 {
207 struct ncsi_channel *nc, *tmp;
208 int index;
209 unsigned long flags;
210
211 nc = kzalloc(sizeof(*nc), GFP_ATOMIC);
212 if (!nc)
213 return NULL;
214
215 nc->id = id;
216 nc->package = np;
217 nc->state = NCSI_CHANNEL_INACTIVE;
218 nc->monitor.enabled = false;
219 timer_setup(&nc->monitor.timer, ncsi_channel_monitor, 0);
220 spin_lock_init(&nc->lock);
221 INIT_LIST_HEAD(&nc->link);
222 for (index = 0; index < NCSI_CAP_MAX; index++)
223 nc->caps[index].index = index;
224 for (index = 0; index < NCSI_MODE_MAX; index++)
225 nc->modes[index].index = index;
226
227 spin_lock_irqsave(&np->lock, flags);
228 tmp = ncsi_find_channel(np, id);
229 if (tmp) {
230 spin_unlock_irqrestore(&np->lock, flags);
231 kfree(nc);
232 return tmp;
233 }
234
235 list_add_tail_rcu(&nc->node, &np->channels);
236 np->channel_num++;
237 spin_unlock_irqrestore(&np->lock, flags);
238
239 return nc;
240 }
241
242 static void ncsi_remove_channel(struct ncsi_channel *nc)
243 {
244 struct ncsi_package *np = nc->package;
245 unsigned long flags;
246
247 spin_lock_irqsave(&nc->lock, flags);
248
249 /* Release filters */
250 kfree(nc->mac_filter.addrs);
251 kfree(nc->vlan_filter.vids);
252
253 nc->state = NCSI_CHANNEL_INACTIVE;
254 spin_unlock_irqrestore(&nc->lock, flags);
255 ncsi_stop_channel_monitor(nc);
256
257 /* Remove and free channel */
258 spin_lock_irqsave(&np->lock, flags);
259 list_del_rcu(&nc->node);
260 np->channel_num--;
261 spin_unlock_irqrestore(&np->lock, flags);
262
263 kfree(nc);
264 }
265
266 struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp,
267 unsigned char id)
268 {
269 struct ncsi_package *np;
270
271 NCSI_FOR_EACH_PACKAGE(ndp, np) {
272 if (np->id == id)
273 return np;
274 }
275
276 return NULL;
277 }
278
279 struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp,
280 unsigned char id)
281 {
282 struct ncsi_package *np, *tmp;
283 unsigned long flags;
284
285 np = kzalloc(sizeof(*np), GFP_ATOMIC);
286 if (!np)
287 return NULL;
288
289 np->id = id;
290 np->ndp = ndp;
291 spin_lock_init(&np->lock);
292 INIT_LIST_HEAD(&np->channels);
293 np->channel_whitelist = UINT_MAX;
294
295 spin_lock_irqsave(&ndp->lock, flags);
296 tmp = ncsi_find_package(ndp, id);
297 if (tmp) {
298 spin_unlock_irqrestore(&ndp->lock, flags);
299 kfree(np);
300 return tmp;
301 }
302
303 list_add_tail_rcu(&np->node, &ndp->packages);
304 ndp->package_num++;
305 spin_unlock_irqrestore(&ndp->lock, flags);
306
307 return np;
308 }
309
310 void ncsi_remove_package(struct ncsi_package *np)
311 {
312 struct ncsi_dev_priv *ndp = np->ndp;
313 struct ncsi_channel *nc, *tmp;
314 unsigned long flags;
315
316 /* Release all child channels */
317 list_for_each_entry_safe(nc, tmp, &np->channels, node)
318 ncsi_remove_channel(nc);
319
320 /* Remove and free package */
321 spin_lock_irqsave(&ndp->lock, flags);
322 list_del_rcu(&np->node);
323 ndp->package_num--;
324 spin_unlock_irqrestore(&ndp->lock, flags);
325
326 kfree(np);
327 }
328
329 void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp,
330 unsigned char id,
331 struct ncsi_package **np,
332 struct ncsi_channel **nc)
333 {
334 struct ncsi_package *p;
335 struct ncsi_channel *c;
336
337 p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id));
338 c = p ? ncsi_find_channel(p, NCSI_CHANNEL_INDEX(id)) : NULL;
339
340 if (np)
341 *np = p;
342 if (nc)
343 *nc = c;
344 }
345
346 /* For two consecutive NCSI commands, the packet IDs shouldn't
347 * be same. Otherwise, the bogus response might be replied. So
348 * the available IDs are allocated in round-robin fashion.
349 */
350 struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp,
351 unsigned int req_flags)
352 {
353 struct ncsi_request *nr = NULL;
354 int i, limit = ARRAY_SIZE(ndp->requests);
355 unsigned long flags;
356
357 /* Check if there is one available request until the ceiling */
358 spin_lock_irqsave(&ndp->lock, flags);
359 for (i = ndp->request_id; i < limit; i++) {
360 if (ndp->requests[i].used)
361 continue;
362
363 nr = &ndp->requests[i];
364 nr->used = true;
365 nr->flags = req_flags;
366 ndp->request_id = i + 1;
367 goto found;
368 }
369
370 /* Fail back to check from the starting cursor */
371 for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) {
372 if (ndp->requests[i].used)
373 continue;
374
375 nr = &ndp->requests[i];
376 nr->used = true;
377 nr->flags = req_flags;
378 ndp->request_id = i + 1;
379 goto found;
380 }
381
382 found:
383 spin_unlock_irqrestore(&ndp->lock, flags);
384 return nr;
385 }
386
387 void ncsi_free_request(struct ncsi_request *nr)
388 {
389 struct ncsi_dev_priv *ndp = nr->ndp;
390 struct sk_buff *cmd, *rsp;
391 unsigned long flags;
392 bool driven;
393
394 if (nr->enabled) {
395 nr->enabled = false;
396 del_timer_sync(&nr->timer);
397 }
398
399 spin_lock_irqsave(&ndp->lock, flags);
400 cmd = nr->cmd;
401 rsp = nr->rsp;
402 nr->cmd = NULL;
403 nr->rsp = NULL;
404 nr->used = false;
405 driven = !!(nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN);
406 spin_unlock_irqrestore(&ndp->lock, flags);
407
408 if (driven && cmd && --ndp->pending_req_num == 0)
409 schedule_work(&ndp->work);
410
411 /* Release command and response */
412 consume_skb(cmd);
413 consume_skb(rsp);
414 }
415
416 struct ncsi_dev *ncsi_find_dev(struct net_device *dev)
417 {
418 struct ncsi_dev_priv *ndp;
419
420 NCSI_FOR_EACH_DEV(ndp) {
421 if (ndp->ndev.dev == dev)
422 return &ndp->ndev;
423 }
424
425 return NULL;
426 }
427
428 static void ncsi_request_timeout(struct timer_list *t)
429 {
430 struct ncsi_request *nr = from_timer(nr, t, timer);
431 struct ncsi_dev_priv *ndp = nr->ndp;
432 struct ncsi_cmd_pkt *cmd;
433 struct ncsi_package *np;
434 struct ncsi_channel *nc;
435 unsigned long flags;
436
437 /* If the request already had associated response,
438 * let the response handler to release it.
439 */
440 spin_lock_irqsave(&ndp->lock, flags);
441 nr->enabled = false;
442 if (nr->rsp || !nr->cmd) {
443 spin_unlock_irqrestore(&ndp->lock, flags);
444 return;
445 }
446 spin_unlock_irqrestore(&ndp->lock, flags);
447
448 if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
449 if (nr->cmd) {
450 /* Find the package */
451 cmd = (struct ncsi_cmd_pkt *)
452 skb_network_header(nr->cmd);
453 ncsi_find_package_and_channel(ndp,
454 cmd->cmd.common.channel,
455 &np, &nc);
456 ncsi_send_netlink_timeout(nr, np, nc);
457 }
458 }
459
460 /* Release the request */
461 ncsi_free_request(nr);
462 }
463
464 static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
465 {
466 struct ncsi_dev *nd = &ndp->ndev;
467 struct ncsi_package *np;
468 struct ncsi_channel *nc, *tmp;
469 struct ncsi_cmd_arg nca;
470 unsigned long flags;
471 int ret;
472
473 np = ndp->active_package;
474 nc = ndp->active_channel;
475 nca.ndp = ndp;
476 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
477 switch (nd->state) {
478 case ncsi_dev_state_suspend:
479 nd->state = ncsi_dev_state_suspend_select;
480 /* Fall through */
481 case ncsi_dev_state_suspend_select:
482 ndp->pending_req_num = 1;
483
484 nca.type = NCSI_PKT_CMD_SP;
485 nca.package = np->id;
486 nca.channel = NCSI_RESERVED_CHANNEL;
487 if (ndp->flags & NCSI_DEV_HWA)
488 nca.bytes[0] = 0;
489 else
490 nca.bytes[0] = 1;
491
492 /* To retrieve the last link states of channels in current
493 * package when current active channel needs fail over to
494 * another one. It means we will possibly select another
495 * channel as next active one. The link states of channels
496 * are most important factor of the selection. So we need
497 * accurate link states. Unfortunately, the link states on
498 * inactive channels can't be updated with LSC AEN in time.
499 */
500 if (ndp->flags & NCSI_DEV_RESHUFFLE)
501 nd->state = ncsi_dev_state_suspend_gls;
502 else
503 nd->state = ncsi_dev_state_suspend_dcnt;
504 ret = ncsi_xmit_cmd(&nca);
505 if (ret)
506 goto error;
507
508 break;
509 case ncsi_dev_state_suspend_gls:
510 ndp->pending_req_num = np->channel_num;
511
512 nca.type = NCSI_PKT_CMD_GLS;
513 nca.package = np->id;
514
515 nd->state = ncsi_dev_state_suspend_dcnt;
516 NCSI_FOR_EACH_CHANNEL(np, nc) {
517 nca.channel = nc->id;
518 ret = ncsi_xmit_cmd(&nca);
519 if (ret)
520 goto error;
521 }
522
523 break;
524 case ncsi_dev_state_suspend_dcnt:
525 ndp->pending_req_num = 1;
526
527 nca.type = NCSI_PKT_CMD_DCNT;
528 nca.package = np->id;
529 nca.channel = nc->id;
530
531 nd->state = ncsi_dev_state_suspend_dc;
532 ret = ncsi_xmit_cmd(&nca);
533 if (ret)
534 goto error;
535
536 break;
537 case ncsi_dev_state_suspend_dc:
538 ndp->pending_req_num = 1;
539
540 nca.type = NCSI_PKT_CMD_DC;
541 nca.package = np->id;
542 nca.channel = nc->id;
543 nca.bytes[0] = 1;
544
545 nd->state = ncsi_dev_state_suspend_deselect;
546 ret = ncsi_xmit_cmd(&nca);
547 if (ret)
548 goto error;
549
550 NCSI_FOR_EACH_CHANNEL(np, tmp) {
551 /* If there is another channel active on this package
552 * do not deselect the package.
553 */
554 if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) {
555 nd->state = ncsi_dev_state_suspend_done;
556 break;
557 }
558 }
559 break;
560 case ncsi_dev_state_suspend_deselect:
561 ndp->pending_req_num = 1;
562
563 nca.type = NCSI_PKT_CMD_DP;
564 nca.package = np->id;
565 nca.channel = NCSI_RESERVED_CHANNEL;
566
567 nd->state = ncsi_dev_state_suspend_done;
568 ret = ncsi_xmit_cmd(&nca);
569 if (ret)
570 goto error;
571
572 break;
573 case ncsi_dev_state_suspend_done:
574 spin_lock_irqsave(&nc->lock, flags);
575 nc->state = NCSI_CHANNEL_INACTIVE;
576 spin_unlock_irqrestore(&nc->lock, flags);
577 if (ndp->flags & NCSI_DEV_RESET)
578 ncsi_reset_dev(nd);
579 else
580 ncsi_process_next_channel(ndp);
581 break;
582 default:
583 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n",
584 nd->state);
585 }
586
587 return;
588 error:
589 nd->state = ncsi_dev_state_functional;
590 }
591
592 /* Check the VLAN filter bitmap for a set filter, and construct a
593 * "Set VLAN Filter - Disable" packet if found.
594 */
595 static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
596 struct ncsi_cmd_arg *nca)
597 {
598 struct ncsi_channel_vlan_filter *ncf;
599 unsigned long flags;
600 void *bitmap;
601 int index;
602 u16 vid;
603
604 ncf = &nc->vlan_filter;
605 bitmap = &ncf->bitmap;
606
607 spin_lock_irqsave(&nc->lock, flags);
608 index = find_next_bit(bitmap, ncf->n_vids, 0);
609 if (index >= ncf->n_vids) {
610 spin_unlock_irqrestore(&nc->lock, flags);
611 return -1;
612 }
613 vid = ncf->vids[index];
614
615 clear_bit(index, bitmap);
616 ncf->vids[index] = 0;
617 spin_unlock_irqrestore(&nc->lock, flags);
618
619 nca->type = NCSI_PKT_CMD_SVF;
620 nca->words[1] = vid;
621 /* HW filter index starts at 1 */
622 nca->bytes[6] = index + 1;
623 nca->bytes[7] = 0x00;
624 return 0;
625 }
626
627 /* Find an outstanding VLAN tag and constuct a "Set VLAN Filter - Enable"
628 * packet.
629 */
630 static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
631 struct ncsi_cmd_arg *nca)
632 {
633 struct ncsi_channel_vlan_filter *ncf;
634 struct vlan_vid *vlan = NULL;
635 unsigned long flags;
636 int i, index;
637 void *bitmap;
638 u16 vid;
639
640 if (list_empty(&ndp->vlan_vids))
641 return -1;
642
643 ncf = &nc->vlan_filter;
644 bitmap = &ncf->bitmap;
645
646 spin_lock_irqsave(&nc->lock, flags);
647
648 rcu_read_lock();
649 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
650 vid = vlan->vid;
651 for (i = 0; i < ncf->n_vids; i++)
652 if (ncf->vids[i] == vid) {
653 vid = 0;
654 break;
655 }
656 if (vid)
657 break;
658 }
659 rcu_read_unlock();
660
661 if (!vid) {
662 /* No VLAN ID is not set */
663 spin_unlock_irqrestore(&nc->lock, flags);
664 return -1;
665 }
666
667 index = find_next_zero_bit(bitmap, ncf->n_vids, 0);
668 if (index < 0 || index >= ncf->n_vids) {
669 netdev_err(ndp->ndev.dev,
670 "Channel %u already has all VLAN filters set\n",
671 nc->id);
672 spin_unlock_irqrestore(&nc->lock, flags);
673 return -1;
674 }
675
676 ncf->vids[index] = vid;
677 set_bit(index, bitmap);
678 spin_unlock_irqrestore(&nc->lock, flags);
679
680 nca->type = NCSI_PKT_CMD_SVF;
681 nca->words[1] = vid;
682 /* HW filter index starts at 1 */
683 nca->bytes[6] = index + 1;
684 nca->bytes[7] = 0x01;
685
686 return 0;
687 }
688
689 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
690
691 /* NCSI OEM Command APIs */
692 static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
693 {
694 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
695 int ret = 0;
696
697 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
698
699 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
700 *(unsigned int *)data = ntohl(NCSI_OEM_MFR_BCM_ID);
701 data[5] = NCSI_OEM_BCM_CMD_GMA;
702
703 nca->data = data;
704
705 ret = ncsi_xmit_cmd(nca);
706 if (ret)
707 netdev_err(nca->ndp->ndev.dev,
708 "NCSI: Failed to transmit cmd 0x%x during configure\n",
709 nca->type);
710 return ret;
711 }
712
713 static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
714 {
715 union {
716 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
717 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
718 } u;
719 int ret = 0;
720
721 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
722
723 memset(&u, 0, sizeof(u));
724 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID);
725 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
726 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
727
728 nca->data = u.data_u8;
729
730 ret = ncsi_xmit_cmd(nca);
731 if (ret)
732 netdev_err(nca->ndp->ndev.dev,
733 "NCSI: Failed to transmit cmd 0x%x during configure\n",
734 nca->type);
735 return ret;
736 }
737
738 /* OEM Command handlers initialization */
739 static struct ncsi_oem_gma_handler {
740 unsigned int mfr_id;
741 int (*handler)(struct ncsi_cmd_arg *nca);
742 } ncsi_oem_gma_handlers[] = {
743 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
744 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }
745 };
746
747 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
748 {
749 struct ncsi_oem_gma_handler *nch = NULL;
750 int i;
751
752 /* This function should only be called once, return if flag set */
753 if (nca->ndp->gma_flag == 1)
754 return -1;
755
756 /* Find gma handler for given manufacturer id */
757 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
758 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
759 if (ncsi_oem_gma_handlers[i].handler)
760 nch = &ncsi_oem_gma_handlers[i];
761 break;
762 }
763 }
764
765 if (!nch) {
766 netdev_err(nca->ndp->ndev.dev,
767 "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
768 mf_id);
769 return -1;
770 }
771
772 /* Set the flag for GMA command which should only be called once */
773 nca->ndp->gma_flag = 1;
774
775 /* Get Mac address from NCSI device */
776 return nch->handler(nca);
777 }
778
779 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
780
781 /* Determine if a given channel from the channel_queue should be used for Tx */
782 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
783 struct ncsi_channel *nc)
784 {
785 struct ncsi_channel_mode *ncm;
786 struct ncsi_channel *channel;
787 struct ncsi_package *np;
788
789 /* Check if any other channel has Tx enabled; a channel may have already
790 * been configured and removed from the channel queue.
791 */
792 NCSI_FOR_EACH_PACKAGE(ndp, np) {
793 if (!ndp->multi_package && np != nc->package)
794 continue;
795 NCSI_FOR_EACH_CHANNEL(np, channel) {
796 ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
797 if (ncm->enable)
798 return false;
799 }
800 }
801
802 /* This channel is the preferred channel and has link */
803 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
804 np = channel->package;
805 if (np->preferred_channel &&
806 ncsi_channel_has_link(np->preferred_channel)) {
807 return np->preferred_channel == nc;
808 }
809 }
810
811 /* This channel has link */
812 if (ncsi_channel_has_link(nc))
813 return true;
814
815 list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
816 if (ncsi_channel_has_link(channel))
817 return false;
818
819 /* No other channel has link; default to this one */
820 return true;
821 }
822
823 /* Change the active Tx channel in a multi-channel setup */
824 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
825 struct ncsi_package *package,
826 struct ncsi_channel *disable,
827 struct ncsi_channel *enable)
828 {
829 struct ncsi_cmd_arg nca;
830 struct ncsi_channel *nc;
831 struct ncsi_package *np;
832 int ret = 0;
833
834 if (!package->multi_channel && !ndp->multi_package)
835 netdev_warn(ndp->ndev.dev,
836 "NCSI: Trying to update Tx channel in single-channel mode\n");
837 nca.ndp = ndp;
838 nca.req_flags = 0;
839
840 /* Find current channel with Tx enabled */
841 NCSI_FOR_EACH_PACKAGE(ndp, np) {
842 if (disable)
843 break;
844 if (!ndp->multi_package && np != package)
845 continue;
846
847 NCSI_FOR_EACH_CHANNEL(np, nc)
848 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
849 disable = nc;
850 break;
851 }
852 }
853
854 /* Find a suitable channel for Tx */
855 NCSI_FOR_EACH_PACKAGE(ndp, np) {
856 if (enable)
857 break;
858 if (!ndp->multi_package && np != package)
859 continue;
860 if (!(ndp->package_whitelist & (0x1 << np->id)))
861 continue;
862
863 if (np->preferred_channel &&
864 ncsi_channel_has_link(np->preferred_channel)) {
865 enable = np->preferred_channel;
866 break;
867 }
868
869 NCSI_FOR_EACH_CHANNEL(np, nc) {
870 if (!(np->channel_whitelist & 0x1 << nc->id))
871 continue;
872 if (nc->state != NCSI_CHANNEL_ACTIVE)
873 continue;
874 if (ncsi_channel_has_link(nc)) {
875 enable = nc;
876 break;
877 }
878 }
879 }
880
881 if (disable == enable)
882 return -1;
883
884 if (!enable)
885 return -1;
886
887 if (disable) {
888 nca.channel = disable->id;
889 nca.package = disable->package->id;
890 nca.type = NCSI_PKT_CMD_DCNT;
891 ret = ncsi_xmit_cmd(&nca);
892 if (ret)
893 netdev_err(ndp->ndev.dev,
894 "Error %d sending DCNT\n",
895 ret);
896 }
897
898 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
899
900 nca.channel = enable->id;
901 nca.package = enable->package->id;
902 nca.type = NCSI_PKT_CMD_ECNT;
903 ret = ncsi_xmit_cmd(&nca);
904 if (ret)
905 netdev_err(ndp->ndev.dev,
906 "Error %d sending ECNT\n",
907 ret);
908
909 return ret;
910 }
911
912 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
913 {
914 struct ncsi_package *np = ndp->active_package;
915 struct ncsi_channel *nc = ndp->active_channel;
916 struct ncsi_channel *hot_nc = NULL;
917 struct ncsi_dev *nd = &ndp->ndev;
918 struct net_device *dev = nd->dev;
919 struct ncsi_cmd_arg nca;
920 unsigned char index;
921 unsigned long flags;
922 int ret;
923
924 nca.ndp = ndp;
925 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
926 switch (nd->state) {
927 case ncsi_dev_state_config:
928 case ncsi_dev_state_config_sp:
929 ndp->pending_req_num = 1;
930
931 /* Select the specific package */
932 nca.type = NCSI_PKT_CMD_SP;
933 if (ndp->flags & NCSI_DEV_HWA)
934 nca.bytes[0] = 0;
935 else
936 nca.bytes[0] = 1;
937 nca.package = np->id;
938 nca.channel = NCSI_RESERVED_CHANNEL;
939 ret = ncsi_xmit_cmd(&nca);
940 if (ret) {
941 netdev_err(ndp->ndev.dev,
942 "NCSI: Failed to transmit CMD_SP\n");
943 goto error;
944 }
945
946 nd->state = ncsi_dev_state_config_cis;
947 break;
948 case ncsi_dev_state_config_cis:
949 ndp->pending_req_num = 1;
950
951 /* Clear initial state */
952 nca.type = NCSI_PKT_CMD_CIS;
953 nca.package = np->id;
954 nca.channel = nc->id;
955 ret = ncsi_xmit_cmd(&nca);
956 if (ret) {
957 netdev_err(ndp->ndev.dev,
958 "NCSI: Failed to transmit CMD_CIS\n");
959 goto error;
960 }
961
962 nd->state = ncsi_dev_state_config_oem_gma;
963 break;
964 case ncsi_dev_state_config_oem_gma:
965 nd->state = ncsi_dev_state_config_clear_vids;
966 ret = -1;
967
968 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
969 nca.type = NCSI_PKT_CMD_OEM;
970 nca.package = np->id;
971 nca.channel = nc->id;
972 ndp->pending_req_num = 1;
973 ret = ncsi_gma_handler(&nca, nc->version.mf_id);
974 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
975
976 if (ret < 0)
977 schedule_work(&ndp->work);
978
979 break;
980 case ncsi_dev_state_config_clear_vids:
981 case ncsi_dev_state_config_svf:
982 case ncsi_dev_state_config_ev:
983 case ncsi_dev_state_config_sma:
984 case ncsi_dev_state_config_ebf:
985 #if IS_ENABLED(CONFIG_IPV6)
986 case ncsi_dev_state_config_egmf:
987 #endif
988 case ncsi_dev_state_config_ecnt:
989 case ncsi_dev_state_config_ec:
990 case ncsi_dev_state_config_ae:
991 case ncsi_dev_state_config_gls:
992 ndp->pending_req_num = 1;
993
994 nca.package = np->id;
995 nca.channel = nc->id;
996
997 /* Clear any active filters on the channel before setting */
998 if (nd->state == ncsi_dev_state_config_clear_vids) {
999 ret = clear_one_vid(ndp, nc, &nca);
1000 if (ret) {
1001 nd->state = ncsi_dev_state_config_svf;
1002 schedule_work(&ndp->work);
1003 break;
1004 }
1005 /* Repeat */
1006 nd->state = ncsi_dev_state_config_clear_vids;
1007 /* Add known VLAN tags to the filter */
1008 } else if (nd->state == ncsi_dev_state_config_svf) {
1009 ret = set_one_vid(ndp, nc, &nca);
1010 if (ret) {
1011 nd->state = ncsi_dev_state_config_ev;
1012 schedule_work(&ndp->work);
1013 break;
1014 }
1015 /* Repeat */
1016 nd->state = ncsi_dev_state_config_svf;
1017 /* Enable/Disable the VLAN filter */
1018 } else if (nd->state == ncsi_dev_state_config_ev) {
1019 if (list_empty(&ndp->vlan_vids)) {
1020 nca.type = NCSI_PKT_CMD_DV;
1021 } else {
1022 nca.type = NCSI_PKT_CMD_EV;
1023 nca.bytes[3] = NCSI_CAP_VLAN_NO;
1024 }
1025 nd->state = ncsi_dev_state_config_sma;
1026 } else if (nd->state == ncsi_dev_state_config_sma) {
1027 /* Use first entry in unicast filter table. Note that
1028 * the MAC filter table starts from entry 1 instead of
1029 * 0.
1030 */
1031 nca.type = NCSI_PKT_CMD_SMA;
1032 for (index = 0; index < 6; index++)
1033 nca.bytes[index] = dev->dev_addr[index];
1034 nca.bytes[6] = 0x1;
1035 nca.bytes[7] = 0x1;
1036 nd->state = ncsi_dev_state_config_ebf;
1037 } else if (nd->state == ncsi_dev_state_config_ebf) {
1038 nca.type = NCSI_PKT_CMD_EBF;
1039 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
1040 if (ncsi_channel_is_tx(ndp, nc))
1041 nd->state = ncsi_dev_state_config_ecnt;
1042 else
1043 nd->state = ncsi_dev_state_config_ec;
1044 #if IS_ENABLED(CONFIG_IPV6)
1045 if (ndp->inet6_addr_num > 0 &&
1046 (nc->caps[NCSI_CAP_GENERIC].cap &
1047 NCSI_CAP_GENERIC_MC))
1048 nd->state = ncsi_dev_state_config_egmf;
1049 } else if (nd->state == ncsi_dev_state_config_egmf) {
1050 nca.type = NCSI_PKT_CMD_EGMF;
1051 nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap;
1052 if (ncsi_channel_is_tx(ndp, nc))
1053 nd->state = ncsi_dev_state_config_ecnt;
1054 else
1055 nd->state = ncsi_dev_state_config_ec;
1056 #endif /* CONFIG_IPV6 */
1057 } else if (nd->state == ncsi_dev_state_config_ecnt) {
1058 if (np->preferred_channel &&
1059 nc != np->preferred_channel)
1060 netdev_info(ndp->ndev.dev,
1061 "NCSI: Tx failed over to channel %u\n",
1062 nc->id);
1063 nca.type = NCSI_PKT_CMD_ECNT;
1064 nd->state = ncsi_dev_state_config_ec;
1065 } else if (nd->state == ncsi_dev_state_config_ec) {
1066 /* Enable AEN if it's supported */
1067 nca.type = NCSI_PKT_CMD_EC;
1068 nd->state = ncsi_dev_state_config_ae;
1069 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
1070 nd->state = ncsi_dev_state_config_gls;
1071 } else if (nd->state == ncsi_dev_state_config_ae) {
1072 nca.type = NCSI_PKT_CMD_AE;
1073 nca.bytes[0] = 0;
1074 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
1075 nd->state = ncsi_dev_state_config_gls;
1076 } else if (nd->state == ncsi_dev_state_config_gls) {
1077 nca.type = NCSI_PKT_CMD_GLS;
1078 nd->state = ncsi_dev_state_config_done;
1079 }
1080
1081 ret = ncsi_xmit_cmd(&nca);
1082 if (ret) {
1083 netdev_err(ndp->ndev.dev,
1084 "NCSI: Failed to transmit CMD %x\n",
1085 nca.type);
1086 goto error;
1087 }
1088 break;
1089 case ncsi_dev_state_config_done:
1090 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
1091 nc->id);
1092 spin_lock_irqsave(&nc->lock, flags);
1093 nc->state = NCSI_CHANNEL_ACTIVE;
1094
1095 if (ndp->flags & NCSI_DEV_RESET) {
1096 /* A reset event happened during config, start it now */
1097 nc->reconfigure_needed = false;
1098 spin_unlock_irqrestore(&nc->lock, flags);
1099 ncsi_reset_dev(nd);
1100 break;
1101 }
1102
1103 if (nc->reconfigure_needed) {
1104 /* This channel's configuration has been updated
1105 * part-way during the config state - start the
1106 * channel configuration over
1107 */
1108 nc->reconfigure_needed = false;
1109 nc->state = NCSI_CHANNEL_INACTIVE;
1110 spin_unlock_irqrestore(&nc->lock, flags);
1111
1112 spin_lock_irqsave(&ndp->lock, flags);
1113 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1114 spin_unlock_irqrestore(&ndp->lock, flags);
1115
1116 netdev_dbg(dev, "Dirty NCSI channel state reset\n");
1117 ncsi_process_next_channel(ndp);
1118 break;
1119 }
1120
1121 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
1122 hot_nc = nc;
1123 } else {
1124 hot_nc = NULL;
1125 netdev_dbg(ndp->ndev.dev,
1126 "NCSI: channel %u link down after config\n",
1127 nc->id);
1128 }
1129 spin_unlock_irqrestore(&nc->lock, flags);
1130
1131 /* Update the hot channel */
1132 spin_lock_irqsave(&ndp->lock, flags);
1133 ndp->hot_channel = hot_nc;
1134 spin_unlock_irqrestore(&ndp->lock, flags);
1135
1136 ncsi_start_channel_monitor(nc);
1137 ncsi_process_next_channel(ndp);
1138 break;
1139 default:
1140 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
1141 nd->state);
1142 }
1143
1144 return;
1145
1146 error:
1147 ncsi_report_link(ndp, true);
1148 }
1149
1150 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
1151 {
1152 struct ncsi_channel *nc, *found, *hot_nc;
1153 struct ncsi_channel_mode *ncm;
1154 unsigned long flags, cflags;
1155 struct ncsi_package *np;
1156 bool with_link;
1157
1158 spin_lock_irqsave(&ndp->lock, flags);
1159 hot_nc = ndp->hot_channel;
1160 spin_unlock_irqrestore(&ndp->lock, flags);
1161
1162 /* By default the search is done once an inactive channel with up
1163 * link is found, unless a preferred channel is set.
1164 * If multi_package or multi_channel are configured all channels in the
1165 * whitelist are added to the channel queue.
1166 */
1167 found = NULL;
1168 with_link = false;
1169 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1170 if (!(ndp->package_whitelist & (0x1 << np->id)))
1171 continue;
1172 NCSI_FOR_EACH_CHANNEL(np, nc) {
1173 if (!(np->channel_whitelist & (0x1 << nc->id)))
1174 continue;
1175
1176 spin_lock_irqsave(&nc->lock, cflags);
1177
1178 if (!list_empty(&nc->link) ||
1179 nc->state != NCSI_CHANNEL_INACTIVE) {
1180 spin_unlock_irqrestore(&nc->lock, cflags);
1181 continue;
1182 }
1183
1184 if (!found)
1185 found = nc;
1186
1187 if (nc == hot_nc)
1188 found = nc;
1189
1190 ncm = &nc->modes[NCSI_MODE_LINK];
1191 if (ncm->data[2] & 0x1) {
1192 found = nc;
1193 with_link = true;
1194 }
1195
1196 /* If multi_channel is enabled configure all valid
1197 * channels whether or not they currently have link
1198 * so they will have AENs enabled.
1199 */
1200 if (with_link || np->multi_channel) {
1201 spin_lock_irqsave(&ndp->lock, flags);
1202 list_add_tail_rcu(&nc->link,
1203 &ndp->channel_queue);
1204 spin_unlock_irqrestore(&ndp->lock, flags);
1205
1206 netdev_dbg(ndp->ndev.dev,
1207 "NCSI: Channel %u added to queue (link %s)\n",
1208 nc->id,
1209 ncm->data[2] & 0x1 ? "up" : "down");
1210 }
1211
1212 spin_unlock_irqrestore(&nc->lock, cflags);
1213
1214 if (with_link && !np->multi_channel)
1215 break;
1216 }
1217 if (with_link && !ndp->multi_package)
1218 break;
1219 }
1220
1221 if (list_empty(&ndp->channel_queue) && found) {
1222 netdev_info(ndp->ndev.dev,
1223 "NCSI: No channel with link found, configuring channel %u\n",
1224 found->id);
1225 spin_lock_irqsave(&ndp->lock, flags);
1226 list_add_tail_rcu(&found->link, &ndp->channel_queue);
1227 spin_unlock_irqrestore(&ndp->lock, flags);
1228 } else if (!found) {
1229 netdev_warn(ndp->ndev.dev,
1230 "NCSI: No channel found to configure!\n");
1231 ncsi_report_link(ndp, true);
1232 return -ENODEV;
1233 }
1234
1235 return ncsi_process_next_channel(ndp);
1236 }
1237
1238 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
1239 {
1240 struct ncsi_package *np;
1241 struct ncsi_channel *nc;
1242 unsigned int cap;
1243 bool has_channel = false;
1244
1245 /* The hardware arbitration is disabled if any one channel
1246 * doesn't support explicitly.
1247 */
1248 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1249 NCSI_FOR_EACH_CHANNEL(np, nc) {
1250 has_channel = true;
1251
1252 cap = nc->caps[NCSI_CAP_GENERIC].cap;
1253 if (!(cap & NCSI_CAP_GENERIC_HWA) ||
1254 (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
1255 NCSI_CAP_GENERIC_HWA_SUPPORT) {
1256 ndp->flags &= ~NCSI_DEV_HWA;
1257 return false;
1258 }
1259 }
1260 }
1261
1262 if (has_channel) {
1263 ndp->flags |= NCSI_DEV_HWA;
1264 return true;
1265 }
1266
1267 ndp->flags &= ~NCSI_DEV_HWA;
1268 return false;
1269 }
1270
1271 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
1272 {
1273 struct ncsi_dev *nd = &ndp->ndev;
1274 struct ncsi_package *np;
1275 struct ncsi_channel *nc;
1276 struct ncsi_cmd_arg nca;
1277 unsigned char index;
1278 int ret;
1279
1280 nca.ndp = ndp;
1281 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
1282 switch (nd->state) {
1283 case ncsi_dev_state_probe:
1284 nd->state = ncsi_dev_state_probe_deselect;
1285 /* Fall through */
1286 case ncsi_dev_state_probe_deselect:
1287 ndp->pending_req_num = 8;
1288
1289 /* Deselect all possible packages */
1290 nca.type = NCSI_PKT_CMD_DP;
1291 nca.channel = NCSI_RESERVED_CHANNEL;
1292 for (index = 0; index < 8; index++) {
1293 nca.package = index;
1294 ret = ncsi_xmit_cmd(&nca);
1295 if (ret)
1296 goto error;
1297 }
1298
1299 nd->state = ncsi_dev_state_probe_package;
1300 break;
1301 case ncsi_dev_state_probe_package:
1302 ndp->pending_req_num = 1;
1303
1304 nca.type = NCSI_PKT_CMD_SP;
1305 nca.bytes[0] = 1;
1306 nca.package = ndp->package_probe_id;
1307 nca.channel = NCSI_RESERVED_CHANNEL;
1308 ret = ncsi_xmit_cmd(&nca);
1309 if (ret)
1310 goto error;
1311 nd->state = ncsi_dev_state_probe_channel;
1312 break;
1313 case ncsi_dev_state_probe_channel:
1314 ndp->active_package = ncsi_find_package(ndp,
1315 ndp->package_probe_id);
1316 if (!ndp->active_package) {
1317 /* No response */
1318 nd->state = ncsi_dev_state_probe_dp;
1319 schedule_work(&ndp->work);
1320 break;
1321 }
1322 nd->state = ncsi_dev_state_probe_cis;
1323 schedule_work(&ndp->work);
1324 break;
1325 case ncsi_dev_state_probe_cis:
1326 ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
1327
1328 /* Clear initial state */
1329 nca.type = NCSI_PKT_CMD_CIS;
1330 nca.package = ndp->active_package->id;
1331 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
1332 nca.channel = index;
1333 ret = ncsi_xmit_cmd(&nca);
1334 if (ret)
1335 goto error;
1336 }
1337
1338 nd->state = ncsi_dev_state_probe_gvi;
1339 break;
1340 case ncsi_dev_state_probe_gvi:
1341 case ncsi_dev_state_probe_gc:
1342 case ncsi_dev_state_probe_gls:
1343 np = ndp->active_package;
1344 ndp->pending_req_num = np->channel_num;
1345
1346 /* Retrieve version, capability or link status */
1347 if (nd->state == ncsi_dev_state_probe_gvi)
1348 nca.type = NCSI_PKT_CMD_GVI;
1349 else if (nd->state == ncsi_dev_state_probe_gc)
1350 nca.type = NCSI_PKT_CMD_GC;
1351 else
1352 nca.type = NCSI_PKT_CMD_GLS;
1353
1354 nca.package = np->id;
1355 NCSI_FOR_EACH_CHANNEL(np, nc) {
1356 nca.channel = nc->id;
1357 ret = ncsi_xmit_cmd(&nca);
1358 if (ret)
1359 goto error;
1360 }
1361
1362 if (nd->state == ncsi_dev_state_probe_gvi)
1363 nd->state = ncsi_dev_state_probe_gc;
1364 else if (nd->state == ncsi_dev_state_probe_gc)
1365 nd->state = ncsi_dev_state_probe_gls;
1366 else
1367 nd->state = ncsi_dev_state_probe_dp;
1368 break;
1369 case ncsi_dev_state_probe_dp:
1370 ndp->pending_req_num = 1;
1371
1372 /* Deselect the current package */
1373 nca.type = NCSI_PKT_CMD_DP;
1374 nca.package = ndp->package_probe_id;
1375 nca.channel = NCSI_RESERVED_CHANNEL;
1376 ret = ncsi_xmit_cmd(&nca);
1377 if (ret)
1378 goto error;
1379
1380 /* Probe next package */
1381 ndp->package_probe_id++;
1382 if (ndp->package_probe_id >= 8) {
1383 /* Probe finished */
1384 ndp->flags |= NCSI_DEV_PROBED;
1385 break;
1386 }
1387 nd->state = ncsi_dev_state_probe_package;
1388 ndp->active_package = NULL;
1389 break;
1390 default:
1391 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
1392 nd->state);
1393 }
1394
1395 if (ndp->flags & NCSI_DEV_PROBED) {
1396 /* Check if all packages have HWA support */
1397 ncsi_check_hwa(ndp);
1398 ncsi_choose_active_channel(ndp);
1399 }
1400
1401 return;
1402 error:
1403 netdev_err(ndp->ndev.dev,
1404 "NCSI: Failed to transmit cmd 0x%x during probe\n",
1405 nca.type);
1406 ncsi_report_link(ndp, true);
1407 }
1408
1409 static void ncsi_dev_work(struct work_struct *work)
1410 {
1411 struct ncsi_dev_priv *ndp = container_of(work,
1412 struct ncsi_dev_priv, work);
1413 struct ncsi_dev *nd = &ndp->ndev;
1414
1415 switch (nd->state & ncsi_dev_state_major) {
1416 case ncsi_dev_state_probe:
1417 ncsi_probe_channel(ndp);
1418 break;
1419 case ncsi_dev_state_suspend:
1420 ncsi_suspend_channel(ndp);
1421 break;
1422 case ncsi_dev_state_config:
1423 ncsi_configure_channel(ndp);
1424 break;
1425 default:
1426 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
1427 nd->state);
1428 }
1429 }
1430
1431 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
1432 {
1433 struct ncsi_channel *nc;
1434 int old_state;
1435 unsigned long flags;
1436
1437 spin_lock_irqsave(&ndp->lock, flags);
1438 nc = list_first_or_null_rcu(&ndp->channel_queue,
1439 struct ncsi_channel, link);
1440 if (!nc) {
1441 spin_unlock_irqrestore(&ndp->lock, flags);
1442 goto out;
1443 }
1444
1445 list_del_init(&nc->link);
1446 spin_unlock_irqrestore(&ndp->lock, flags);
1447
1448 spin_lock_irqsave(&nc->lock, flags);
1449 old_state = nc->state;
1450 nc->state = NCSI_CHANNEL_INVISIBLE;
1451 spin_unlock_irqrestore(&nc->lock, flags);
1452
1453 ndp->active_channel = nc;
1454 ndp->active_package = nc->package;
1455
1456 switch (old_state) {
1457 case NCSI_CHANNEL_INACTIVE:
1458 ndp->ndev.state = ncsi_dev_state_config;
1459 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
1460 nc->id);
1461 ncsi_configure_channel(ndp);
1462 break;
1463 case NCSI_CHANNEL_ACTIVE:
1464 ndp->ndev.state = ncsi_dev_state_suspend;
1465 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
1466 nc->id);
1467 ncsi_suspend_channel(ndp);
1468 break;
1469 default:
1470 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
1471 old_state, nc->package->id, nc->id);
1472 ncsi_report_link(ndp, false);
1473 return -EINVAL;
1474 }
1475
1476 return 0;
1477
1478 out:
1479 ndp->active_channel = NULL;
1480 ndp->active_package = NULL;
1481 if (ndp->flags & NCSI_DEV_RESHUFFLE) {
1482 ndp->flags &= ~NCSI_DEV_RESHUFFLE;
1483 return ncsi_choose_active_channel(ndp);
1484 }
1485
1486 ncsi_report_link(ndp, false);
1487 return -ENODEV;
1488 }
1489
1490 #if IS_ENABLED(CONFIG_IPV6)
1491 static int ncsi_inet6addr_event(struct notifier_block *this,
1492 unsigned long event, void *data)
1493 {
1494 struct inet6_ifaddr *ifa = data;
1495 struct net_device *dev = ifa->idev->dev;
1496 struct ncsi_dev *nd = ncsi_find_dev(dev);
1497 struct ncsi_dev_priv *ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL;
1498 struct ncsi_package *np;
1499 struct ncsi_channel *nc;
1500 struct ncsi_cmd_arg nca;
1501 bool action;
1502 int ret;
1503
1504 if (!ndp || (ipv6_addr_type(&ifa->addr) &
1505 (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK)))
1506 return NOTIFY_OK;
1507
1508 switch (event) {
1509 case NETDEV_UP:
1510 action = (++ndp->inet6_addr_num) == 1;
1511 nca.type = NCSI_PKT_CMD_EGMF;
1512 break;
1513 case NETDEV_DOWN:
1514 action = (--ndp->inet6_addr_num == 0);
1515 nca.type = NCSI_PKT_CMD_DGMF;
1516 break;
1517 default:
1518 return NOTIFY_OK;
1519 }
1520
1521 /* We might not have active channel or packages. The IPv6
1522 * required multicast will be enabled when active channel
1523 * or packages are chosen.
1524 */
1525 np = ndp->active_package;
1526 nc = ndp->active_channel;
1527 if (!action || !np || !nc)
1528 return NOTIFY_OK;
1529
1530 /* We needn't enable or disable it if the function isn't supported */
1531 if (!(nc->caps[NCSI_CAP_GENERIC].cap & NCSI_CAP_GENERIC_MC))
1532 return NOTIFY_OK;
1533
1534 nca.ndp = ndp;
1535 nca.req_flags = 0;
1536 nca.package = np->id;
1537 nca.channel = nc->id;
1538 nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap;
1539 ret = ncsi_xmit_cmd(&nca);
1540 if (ret) {
1541 netdev_warn(dev, "Fail to %s global multicast filter (%d)\n",
1542 (event == NETDEV_UP) ? "enable" : "disable", ret);
1543 return NOTIFY_DONE;
1544 }
1545
1546 return NOTIFY_OK;
1547 }
1548
1549 static struct notifier_block ncsi_inet6addr_notifier = {
1550 .notifier_call = ncsi_inet6addr_event,
1551 };
1552 #endif /* CONFIG_IPV6 */
1553
1554 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
1555 {
1556 struct ncsi_dev *nd = &ndp->ndev;
1557 struct ncsi_channel *nc;
1558 struct ncsi_package *np;
1559 unsigned long flags;
1560 unsigned int n = 0;
1561
1562 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1563 NCSI_FOR_EACH_CHANNEL(np, nc) {
1564 spin_lock_irqsave(&nc->lock, flags);
1565
1566 /* Channels may be busy, mark dirty instead of
1567 * kicking if;
1568 * a) not ACTIVE (configured)
1569 * b) in the channel_queue (to be configured)
1570 * c) it's ndev is in the config state
1571 */
1572 if (nc->state != NCSI_CHANNEL_ACTIVE) {
1573 if ((ndp->ndev.state & 0xff00) ==
1574 ncsi_dev_state_config ||
1575 !list_empty(&nc->link)) {
1576 netdev_dbg(nd->dev,
1577 "NCSI: channel %p marked dirty\n",
1578 nc);
1579 nc->reconfigure_needed = true;
1580 }
1581 spin_unlock_irqrestore(&nc->lock, flags);
1582 continue;
1583 }
1584
1585 spin_unlock_irqrestore(&nc->lock, flags);
1586
1587 ncsi_stop_channel_monitor(nc);
1588 spin_lock_irqsave(&nc->lock, flags);
1589 nc->state = NCSI_CHANNEL_INACTIVE;
1590 spin_unlock_irqrestore(&nc->lock, flags);
1591
1592 spin_lock_irqsave(&ndp->lock, flags);
1593 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1594 spin_unlock_irqrestore(&ndp->lock, flags);
1595
1596 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
1597 n++;
1598 }
1599 }
1600
1601 return n;
1602 }
1603
1604 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1605 {
1606 struct ncsi_dev_priv *ndp;
1607 unsigned int n_vids = 0;
1608 struct vlan_vid *vlan;
1609 struct ncsi_dev *nd;
1610 bool found = false;
1611
1612 if (vid == 0)
1613 return 0;
1614
1615 nd = ncsi_find_dev(dev);
1616 if (!nd) {
1617 netdev_warn(dev, "NCSI: No net_device?\n");
1618 return 0;
1619 }
1620
1621 ndp = TO_NCSI_DEV_PRIV(nd);
1622
1623 /* Add the VLAN id to our internal list */
1624 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
1625 n_vids++;
1626 if (vlan->vid == vid) {
1627 netdev_dbg(dev, "NCSI: vid %u already registered\n",
1628 vid);
1629 return 0;
1630 }
1631 }
1632 if (n_vids >= NCSI_MAX_VLAN_VIDS) {
1633 netdev_warn(dev,
1634 "tried to add vlan id %u but NCSI max already registered (%u)\n",
1635 vid, NCSI_MAX_VLAN_VIDS);
1636 return -ENOSPC;
1637 }
1638
1639 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1640 if (!vlan)
1641 return -ENOMEM;
1642
1643 vlan->proto = proto;
1644 vlan->vid = vid;
1645 list_add_rcu(&vlan->list, &ndp->vlan_vids);
1646
1647 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
1648
1649 found = ncsi_kick_channels(ndp) != 0;
1650
1651 return found ? ncsi_process_next_channel(ndp) : 0;
1652 }
1653 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
1654
1655 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1656 {
1657 struct vlan_vid *vlan, *tmp;
1658 struct ncsi_dev_priv *ndp;
1659 struct ncsi_dev *nd;
1660 bool found = false;
1661
1662 if (vid == 0)
1663 return 0;
1664
1665 nd = ncsi_find_dev(dev);
1666 if (!nd) {
1667 netdev_warn(dev, "NCSI: no net_device?\n");
1668 return 0;
1669 }
1670
1671 ndp = TO_NCSI_DEV_PRIV(nd);
1672
1673 /* Remove the VLAN id from our internal list */
1674 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
1675 if (vlan->vid == vid) {
1676 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
1677 list_del_rcu(&vlan->list);
1678 found = true;
1679 kfree(vlan);
1680 }
1681
1682 if (!found) {
1683 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
1684 return -EINVAL;
1685 }
1686
1687 found = ncsi_kick_channels(ndp) != 0;
1688
1689 return found ? ncsi_process_next_channel(ndp) : 0;
1690 }
1691 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
1692
1693 struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
1694 void (*handler)(struct ncsi_dev *ndev))
1695 {
1696 struct ncsi_dev_priv *ndp;
1697 struct ncsi_dev *nd;
1698 unsigned long flags;
1699 int i;
1700
1701 /* Check if the device has been registered or not */
1702 nd = ncsi_find_dev(dev);
1703 if (nd)
1704 return nd;
1705
1706 /* Create NCSI device */
1707 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
1708 if (!ndp)
1709 return NULL;
1710
1711 nd = &ndp->ndev;
1712 nd->state = ncsi_dev_state_registered;
1713 nd->dev = dev;
1714 nd->handler = handler;
1715 ndp->pending_req_num = 0;
1716 INIT_LIST_HEAD(&ndp->channel_queue);
1717 INIT_LIST_HEAD(&ndp->vlan_vids);
1718 INIT_WORK(&ndp->work, ncsi_dev_work);
1719 ndp->package_whitelist = UINT_MAX;
1720
1721 /* Initialize private NCSI device */
1722 spin_lock_init(&ndp->lock);
1723 INIT_LIST_HEAD(&ndp->packages);
1724 ndp->request_id = NCSI_REQ_START_IDX;
1725 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
1726 ndp->requests[i].id = i;
1727 ndp->requests[i].ndp = ndp;
1728 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
1729 }
1730
1731 spin_lock_irqsave(&ncsi_dev_lock, flags);
1732 #if IS_ENABLED(CONFIG_IPV6)
1733 ndp->inet6_addr_num = 0;
1734 if (list_empty(&ncsi_dev_list))
1735 register_inet6addr_notifier(&ncsi_inet6addr_notifier);
1736 #endif
1737 list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
1738 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1739
1740 /* Register NCSI packet Rx handler */
1741 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
1742 ndp->ptype.func = ncsi_rcv_rsp;
1743 ndp->ptype.dev = dev;
1744 dev_add_pack(&ndp->ptype);
1745
1746 /* Set up generic netlink interface */
1747 ncsi_init_netlink(dev);
1748
1749 return nd;
1750 }
1751 EXPORT_SYMBOL_GPL(ncsi_register_dev);
1752
1753 int ncsi_start_dev(struct ncsi_dev *nd)
1754 {
1755 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1756
1757 if (nd->state != ncsi_dev_state_registered &&
1758 nd->state != ncsi_dev_state_functional)
1759 return -ENOTTY;
1760
1761 if (!(ndp->flags & NCSI_DEV_PROBED)) {
1762 ndp->package_probe_id = 0;
1763 nd->state = ncsi_dev_state_probe;
1764 schedule_work(&ndp->work);
1765 return 0;
1766 }
1767
1768 return ncsi_reset_dev(nd);
1769 }
1770 EXPORT_SYMBOL_GPL(ncsi_start_dev);
1771
1772 void ncsi_stop_dev(struct ncsi_dev *nd)
1773 {
1774 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1775 struct ncsi_package *np;
1776 struct ncsi_channel *nc;
1777 bool chained;
1778 int old_state;
1779 unsigned long flags;
1780
1781 /* Stop the channel monitor on any active channels. Don't reset the
1782 * channel state so we know which were active when ncsi_start_dev()
1783 * is next called.
1784 */
1785 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1786 NCSI_FOR_EACH_CHANNEL(np, nc) {
1787 ncsi_stop_channel_monitor(nc);
1788
1789 spin_lock_irqsave(&nc->lock, flags);
1790 chained = !list_empty(&nc->link);
1791 old_state = nc->state;
1792 spin_unlock_irqrestore(&nc->lock, flags);
1793
1794 WARN_ON_ONCE(chained ||
1795 old_state == NCSI_CHANNEL_INVISIBLE);
1796 }
1797 }
1798
1799 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
1800 ncsi_report_link(ndp, true);
1801 }
1802 EXPORT_SYMBOL_GPL(ncsi_stop_dev);
1803
1804 int ncsi_reset_dev(struct ncsi_dev *nd)
1805 {
1806 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1807 struct ncsi_channel *nc, *active, *tmp;
1808 struct ncsi_package *np;
1809 unsigned long flags;
1810
1811 spin_lock_irqsave(&ndp->lock, flags);
1812
1813 if (!(ndp->flags & NCSI_DEV_RESET)) {
1814 /* Haven't been called yet, check states */
1815 switch (nd->state & ncsi_dev_state_major) {
1816 case ncsi_dev_state_registered:
1817 case ncsi_dev_state_probe:
1818 /* Not even probed yet - do nothing */
1819 spin_unlock_irqrestore(&ndp->lock, flags);
1820 return 0;
1821 case ncsi_dev_state_suspend:
1822 case ncsi_dev_state_config:
1823 /* Wait for the channel to finish its suspend/config
1824 * operation; once it finishes it will check for
1825 * NCSI_DEV_RESET and reset the state.
1826 */
1827 ndp->flags |= NCSI_DEV_RESET;
1828 spin_unlock_irqrestore(&ndp->lock, flags);
1829 return 0;
1830 }
1831 } else {
1832 switch (nd->state) {
1833 case ncsi_dev_state_suspend_done:
1834 case ncsi_dev_state_config_done:
1835 case ncsi_dev_state_functional:
1836 /* Ok */
1837 break;
1838 default:
1839 /* Current reset operation happening */
1840 spin_unlock_irqrestore(&ndp->lock, flags);
1841 return 0;
1842 }
1843 }
1844
1845 if (!list_empty(&ndp->channel_queue)) {
1846 /* Clear any channel queue we may have interrupted */
1847 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
1848 list_del_init(&nc->link);
1849 }
1850 spin_unlock_irqrestore(&ndp->lock, flags);
1851
1852 active = NULL;
1853 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1854 NCSI_FOR_EACH_CHANNEL(np, nc) {
1855 spin_lock_irqsave(&nc->lock, flags);
1856
1857 if (nc->state == NCSI_CHANNEL_ACTIVE) {
1858 active = nc;
1859 nc->state = NCSI_CHANNEL_INVISIBLE;
1860 spin_unlock_irqrestore(&nc->lock, flags);
1861 ncsi_stop_channel_monitor(nc);
1862 break;
1863 }
1864
1865 spin_unlock_irqrestore(&nc->lock, flags);
1866 }
1867 if (active)
1868 break;
1869 }
1870
1871 if (!active) {
1872 /* Done */
1873 spin_lock_irqsave(&ndp->lock, flags);
1874 ndp->flags &= ~NCSI_DEV_RESET;
1875 spin_unlock_irqrestore(&ndp->lock, flags);
1876 return ncsi_choose_active_channel(ndp);
1877 }
1878
1879 spin_lock_irqsave(&ndp->lock, flags);
1880 ndp->flags |= NCSI_DEV_RESET;
1881 ndp->active_channel = active;
1882 ndp->active_package = active->package;
1883 spin_unlock_irqrestore(&ndp->lock, flags);
1884
1885 nd->state = ncsi_dev_state_suspend;
1886 schedule_work(&ndp->work);
1887 return 0;
1888 }
1889
1890 void ncsi_unregister_dev(struct ncsi_dev *nd)
1891 {
1892 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1893 struct ncsi_package *np, *tmp;
1894 unsigned long flags;
1895
1896 dev_remove_pack(&ndp->ptype);
1897
1898 list_for_each_entry_safe(np, tmp, &ndp->packages, node)
1899 ncsi_remove_package(np);
1900
1901 spin_lock_irqsave(&ncsi_dev_lock, flags);
1902 list_del_rcu(&ndp->node);
1903 #if IS_ENABLED(CONFIG_IPV6)
1904 if (list_empty(&ncsi_dev_list))
1905 unregister_inet6addr_notifier(&ncsi_inet6addr_notifier);
1906 #endif
1907 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1908
1909 ncsi_unregister_netlink(nd->dev);
1910
1911 kfree(ndp);
1912 }
1913 EXPORT_SYMBOL_GPL(ncsi_unregister_dev);
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