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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
25LIST_HEAD(ncsi_dev_list);
26DEFINE_SPINLOCK(ncsi_dev_lock);
27
28bool ncsi_channel_has_link(struct ncsi_channel *channel)
29{
30 return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1);
31}
32
33bool 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(nc))
45 return false;
46 }
47
48 return true;
49}
50
51static 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(&nc->link) ||
70 nc->state != NCSI_CHANNEL_ACTIVE) {
71 spin_unlock_irqrestore(&nc->lock, flags);
72 continue;
73 }
74
75 if (ncsi_channel_has_link(nc)) {
76 spin_unlock_irqrestore(&nc->lock, flags);
77 nd->link_up = 1;
78 goto report;
79 }
80
81 spin_unlock_irqrestore(&nc->lock, flags);
82 }
83 }
84
85report:
86 nd->handler(nd);
87}
88
89static 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(&nc->link);
104 enabled = nc->monitor.enabled;
105 monitor_state = nc->monitor.state;
106 spin_unlock_irqrestore(&nc->lock, flags);
107
108 if (!enabled)
109 return;
110 if (WARN_ON_ONCE(chained))
111 goto bad_state;
112
113 if (state != NCSI_CHANNEL_INACTIVE &&
114 state != NCSI_CHANNEL_ACTIVE) {
115bad_state:
116 netdev_warn(ndp->ndev.dev,
117 "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(&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);
134 if (ret)
135 netdev_err(ndp->ndev.dev, "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(ndp->ndev.dev, "NCSI Channel %d timed out!\n",
142 nc->id);
143 ncsi_report_link(ndp, 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(&nc->lock, flags);
152
153 spin_lock_irqsave(&ndp->lock, flags);
154 nc->state = NCSI_CHANNEL_ACTIVE;
155 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
156 spin_unlock_irqrestore(&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(&nc->lock, flags);
164 mod_timer(&nc->monitor.timer, jiffies + HZ);
165}
166
167void 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(&nc->lock, flags);
176
177 mod_timer(&nc->monitor.timer, jiffies + HZ);
178}
179
180void 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(&nc->lock, flags);
187 return;
188 }
189 nc->monitor.enabled = false;
190 spin_unlock_irqrestore(&nc->lock, flags);
191
192 del_timer_sync(&nc->monitor.timer);
193}
194
195struct 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
208struct 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(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(&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(&np->lock, flags);
234 kfree(nc);
235 return tmp;
236 }
237
238 list_add_tail_rcu(&nc->node, &np->channels);
239 np->channel_num++;
240 spin_unlock_irqrestore(&np->lock, flags);
241
242 return nc;
243}
244
245static 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
253 kfree(nc->mac_filter.addrs);
254 kfree(nc->vlan_filter.vids);
255
256 nc->state = NCSI_CHANNEL_INACTIVE;
257 spin_unlock_irqrestore(&nc->lock, flags);
258 ncsi_stop_channel_monitor(nc);
259
260
261 spin_lock_irqsave(&np->lock, flags);
262 list_del_rcu(&nc->node);
263 np->channel_num--;
264 spin_unlock_irqrestore(&np->lock, flags);
265
266 kfree(nc);
267}
268
269struct 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
282struct 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(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(&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(&ndp->lock, flags);
302 kfree(np);
303 return tmp;
304 }
305
306 list_add_tail_rcu(&np->node, &ndp->packages);
307 ndp->package_num++;
308 spin_unlock_irqrestore(&ndp->lock, flags);
309
310 return np;
311}
312
313void 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
320 list_for_each_entry_safe(nc, tmp, &np->channels, node)
321 ncsi_remove_channel(nc);
322
323
324 spin_lock_irqsave(&ndp->lock, flags);
325 list_del_rcu(&np->node);
326 ndp->package_num--;
327 spin_unlock_irqrestore(&ndp->lock, flags);
328
329 kfree(np);
330}
331
332void 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(p, NCSI_CHANNEL_INDEX(id)) : NULL;
342
343 if (np)
344 *np = p;
345 if (nc)
346 *nc = c;
347}
348
349
350
351
352
353struct 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
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
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
385found:
386 spin_unlock_irqrestore(&ndp->lock, flags);
387 return nr;
388}
389
390void 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(&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(&ndp->lock, flags);
410
411 if (driven && cmd && --ndp->pending_req_num == 0)
412 schedule_work(&ndp->work);
413
414
415 consume_skb(cmd);
416 consume_skb(rsp);
417}
418
419struct 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
431static 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
441
442
443 spin_lock_irqsave(&ndp->lock, flags);
444 nr->enabled = false;
445 if (nr->rsp || !nr->cmd) {
446 spin_unlock_irqrestore(&ndp->lock, flags);
447 return;
448 }
449 spin_unlock_irqrestore(&ndp->lock, flags);
450
451 if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
452 if (nr->cmd) {
453
454 cmd = (struct ncsi_cmd_pkt *)
455 skb_network_header(nr->cmd);
456 ncsi_find_package_and_channel(ndp,
457 cmd->cmd.common.channel,
458 &np, &nc);
459 ncsi_send_netlink_timeout(nr, np, nc);
460 }
461 }
462
463
464 ncsi_free_request(nr);
465}
466
467static 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
496
497
498
499
500
501
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);
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);
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);
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);
550 if (ret)
551 goto error;
552
553 NCSI_FOR_EACH_CHANNEL(np, tmp) {
554
555
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);
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(&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(nd->dev, "Wrong NCSI state 0x%x in suspend\n",
587 nd->state);
588 }
589
590 return;
591error:
592 nd->state = ncsi_dev_state_functional;
593}
594
595
596
597
598static 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_next_bit(bitmap, ncf->n_vids, 0);
612 if (index >= ncf->n_vids) {
613 spin_unlock_irqrestore(&nc->lock, flags);
614 return -1;
615 }
616 vid = ncf->vids[index];
617
618 clear_bit(index, bitmap);
619 ncf->vids[index] = 0;
620 spin_unlock_irqrestore(&nc->lock, flags);
621
622 nca->type = NCSI_PKT_CMD_SVF;
623 nca->words[1] = vid;
624
625 nca->bytes[6] = index + 1;
626 nca->bytes[7] = 0x00;
627 return 0;
628}
629
630
631
632
633static 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(&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
666 spin_unlock_irqrestore(&nc->lock, flags);
667 return -1;
668 }
669
670 index = find_next_zero_bit(bitmap, ncf->n_vids, 0);
671 if (index < 0 || index >= ncf->n_vids) {
672 netdev_err(ndp->ndev.dev,
673 "Channel %u already has all VLAN filters set\n",
674 nc->id);
675 spin_unlock_irqrestore(&nc->lock, flags);
676 return -1;
677 }
678
679 ncf->vids[index] = vid;
680 set_bit(index, bitmap);
681 spin_unlock_irqrestore(&nc->lock, flags);
682
683 nca->type = NCSI_PKT_CMD_SVF;
684 nca->words[1] = vid;
685
686 nca->bytes[6] = index + 1;
687 nca->bytes[7] = 0x01;
688
689 return 0;
690}
691
692#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
693
694
695static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
696{
697 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
698 int ret = 0;
699
700 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
701
702 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
703 *(unsigned int *)data = ntohl(NCSI_OEM_MFR_BCM_ID);
704 data[5] = NCSI_OEM_BCM_CMD_GMA;
705
706 nca->data = data;
707
708 ret = ncsi_xmit_cmd(nca);
709 if (ret)
710 netdev_err(nca->ndp->ndev.dev,
711 "NCSI: Failed to transmit cmd 0x%x during configure\n",
712 nca->type);
713 return ret;
714}
715
716static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
717{
718 union {
719 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
720 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
721 } u;
722 int ret = 0;
723
724 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
725
726 memset(&u, 0, sizeof(u));
727 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID);
728 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
729 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
730
731 nca->data = u.data_u8;
732
733 ret = ncsi_xmit_cmd(nca);
734 if (ret)
735 netdev_err(nca->ndp->ndev.dev,
736 "NCSI: Failed to transmit cmd 0x%x during configure\n",
737 nca->type);
738 return ret;
739}
740
741static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca)
742{
743 union {
744 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN];
745 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)];
746 } u;
747 int ret = 0;
748
749 memset(&u, 0, sizeof(u));
750 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID);
751 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF;
752 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM;
753 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET],
754 nca->ndp->ndev.dev->dev_addr, ETH_ALEN);
755 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] =
756 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT);
757
758 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN;
759 nca->data = u.data_u8;
760
761 ret = ncsi_xmit_cmd(nca);
762 if (ret)
763 netdev_err(nca->ndp->ndev.dev,
764 "NCSI: Failed to transmit cmd 0x%x during probe\n",
765 nca->type);
766 return ret;
767}
768
769
770static struct ncsi_oem_gma_handler {
771 unsigned int mfr_id;
772 int (*handler)(struct ncsi_cmd_arg *nca);
773} ncsi_oem_gma_handlers[] = {
774 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
775 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }
776};
777
778static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
779{
780 struct ncsi_oem_gma_handler *nch = NULL;
781 int i;
782
783
784 if (nca->ndp->gma_flag == 1)
785 return -1;
786
787
788 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
789 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
790 if (ncsi_oem_gma_handlers[i].handler)
791 nch = &ncsi_oem_gma_handlers[i];
792 break;
793 }
794 }
795
796 if (!nch) {
797 netdev_err(nca->ndp->ndev.dev,
798 "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
799 mf_id);
800 return -1;
801 }
802
803
804 return nch->handler(nca);
805}
806
807#endif
808
809
810static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
811 struct ncsi_channel *nc)
812{
813 struct ncsi_channel_mode *ncm;
814 struct ncsi_channel *channel;
815 struct ncsi_package *np;
816
817
818
819
820 NCSI_FOR_EACH_PACKAGE(ndp, np) {
821 if (!ndp->multi_package && np != nc->package)
822 continue;
823 NCSI_FOR_EACH_CHANNEL(np, channel) {
824 ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
825 if (ncm->enable)
826 return false;
827 }
828 }
829
830
831 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
832 np = channel->package;
833 if (np->preferred_channel &&
834 ncsi_channel_has_link(np->preferred_channel)) {
835 return np->preferred_channel == nc;
836 }
837 }
838
839
840 if (ncsi_channel_has_link(nc))
841 return true;
842
843 list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
844 if (ncsi_channel_has_link(channel))
845 return false;
846
847
848 return true;
849}
850
851
852int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
853 struct ncsi_package *package,
854 struct ncsi_channel *disable,
855 struct ncsi_channel *enable)
856{
857 struct ncsi_cmd_arg nca;
858 struct ncsi_channel *nc;
859 struct ncsi_package *np;
860 int ret = 0;
861
862 if (!package->multi_channel && !ndp->multi_package)
863 netdev_warn(ndp->ndev.dev,
864 "NCSI: Trying to update Tx channel in single-channel mode\n");
865 nca.ndp = ndp;
866 nca.req_flags = 0;
867
868
869 NCSI_FOR_EACH_PACKAGE(ndp, np) {
870 if (disable)
871 break;
872 if (!ndp->multi_package && np != package)
873 continue;
874
875 NCSI_FOR_EACH_CHANNEL(np, nc)
876 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
877 disable = nc;
878 break;
879 }
880 }
881
882
883 NCSI_FOR_EACH_PACKAGE(ndp, np) {
884 if (enable)
885 break;
886 if (!ndp->multi_package && np != package)
887 continue;
888 if (!(ndp->package_whitelist & (0x1 << np->id)))
889 continue;
890
891 if (np->preferred_channel &&
892 ncsi_channel_has_link(np->preferred_channel)) {
893 enable = np->preferred_channel;
894 break;
895 }
896
897 NCSI_FOR_EACH_CHANNEL(np, nc) {
898 if (!(np->channel_whitelist & 0x1 << nc->id))
899 continue;
900 if (nc->state != NCSI_CHANNEL_ACTIVE)
901 continue;
902 if (ncsi_channel_has_link(nc)) {
903 enable = nc;
904 break;
905 }
906 }
907 }
908
909 if (disable == enable)
910 return -1;
911
912 if (!enable)
913 return -1;
914
915 if (disable) {
916 nca.channel = disable->id;
917 nca.package = disable->package->id;
918 nca.type = NCSI_PKT_CMD_DCNT;
919 ret = ncsi_xmit_cmd(&nca);
920 if (ret)
921 netdev_err(ndp->ndev.dev,
922 "Error %d sending DCNT\n",
923 ret);
924 }
925
926 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
927
928 nca.channel = enable->id;
929 nca.package = enable->package->id;
930 nca.type = NCSI_PKT_CMD_ECNT;
931 ret = ncsi_xmit_cmd(&nca);
932 if (ret)
933 netdev_err(ndp->ndev.dev,
934 "Error %d sending ECNT\n",
935 ret);
936
937 return ret;
938}
939
940static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
941{
942 struct ncsi_package *np = ndp->active_package;
943 struct ncsi_channel *nc = ndp->active_channel;
944 struct ncsi_channel *hot_nc = NULL;
945 struct ncsi_dev *nd = &ndp->ndev;
946 struct net_device *dev = nd->dev;
947 struct ncsi_cmd_arg nca;
948 unsigned char index;
949 unsigned long flags;
950 int ret;
951
952 nca.ndp = ndp;
953 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
954 switch (nd->state) {
955 case ncsi_dev_state_config:
956 case ncsi_dev_state_config_sp:
957 ndp->pending_req_num = 1;
958
959
960 nca.type = NCSI_PKT_CMD_SP;
961 if (ndp->flags & NCSI_DEV_HWA)
962 nca.bytes[0] = 0;
963 else
964 nca.bytes[0] = 1;
965 nca.package = np->id;
966 nca.channel = NCSI_RESERVED_CHANNEL;
967 ret = ncsi_xmit_cmd(&nca);
968 if (ret) {
969 netdev_err(ndp->ndev.dev,
970 "NCSI: Failed to transmit CMD_SP\n");
971 goto error;
972 }
973
974 nd->state = ncsi_dev_state_config_cis;
975 break;
976 case ncsi_dev_state_config_cis:
977 ndp->pending_req_num = 1;
978
979
980 nca.type = NCSI_PKT_CMD_CIS;
981 nca.package = np->id;
982 nca.channel = nc->id;
983 ret = ncsi_xmit_cmd(&nca);
984 if (ret) {
985 netdev_err(ndp->ndev.dev,
986 "NCSI: Failed to transmit CMD_CIS\n");
987 goto error;
988 }
989
990 nd->state = ncsi_dev_state_config_oem_gma;
991 break;
992 case ncsi_dev_state_config_oem_gma:
993 nd->state = ncsi_dev_state_config_clear_vids;
994 ret = -1;
995
996#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
997 nca.type = NCSI_PKT_CMD_OEM;
998 nca.package = np->id;
999 nca.channel = nc->id;
1000 ndp->pending_req_num = 1;
1001 ret = ncsi_gma_handler(&nca, nc->version.mf_id);
1002#endif
1003
1004 if (ret < 0)
1005 schedule_work(&ndp->work);
1006
1007 break;
1008 case ncsi_dev_state_config_clear_vids:
1009 case ncsi_dev_state_config_svf:
1010 case ncsi_dev_state_config_ev:
1011 case ncsi_dev_state_config_sma:
1012 case ncsi_dev_state_config_ebf:
1013 case ncsi_dev_state_config_dgmf:
1014 case ncsi_dev_state_config_ecnt:
1015 case ncsi_dev_state_config_ec:
1016 case ncsi_dev_state_config_ae:
1017 case ncsi_dev_state_config_gls:
1018 ndp->pending_req_num = 1;
1019
1020 nca.package = np->id;
1021 nca.channel = nc->id;
1022
1023
1024 if (nd->state == ncsi_dev_state_config_clear_vids) {
1025 ret = clear_one_vid(ndp, nc, &nca);
1026 if (ret) {
1027 nd->state = ncsi_dev_state_config_svf;
1028 schedule_work(&ndp->work);
1029 break;
1030 }
1031
1032 nd->state = ncsi_dev_state_config_clear_vids;
1033
1034 } else if (nd->state == ncsi_dev_state_config_svf) {
1035 ret = set_one_vid(ndp, nc, &nca);
1036 if (ret) {
1037 nd->state = ncsi_dev_state_config_ev;
1038 schedule_work(&ndp->work);
1039 break;
1040 }
1041
1042 nd->state = ncsi_dev_state_config_svf;
1043
1044 } else if (nd->state == ncsi_dev_state_config_ev) {
1045 if (list_empty(&ndp->vlan_vids)) {
1046 nca.type = NCSI_PKT_CMD_DV;
1047 } else {
1048 nca.type = NCSI_PKT_CMD_EV;
1049 nca.bytes[3] = NCSI_CAP_VLAN_NO;
1050 }
1051 nd->state = ncsi_dev_state_config_sma;
1052 } else if (nd->state == ncsi_dev_state_config_sma) {
1053
1054
1055
1056
1057 nca.type = NCSI_PKT_CMD_SMA;
1058 for (index = 0; index < 6; index++)
1059 nca.bytes[index] = dev->dev_addr[index];
1060 nca.bytes[6] = 0x1;
1061 nca.bytes[7] = 0x1;
1062 nd->state = ncsi_dev_state_config_ebf;
1063 } else if (nd->state == ncsi_dev_state_config_ebf) {
1064 nca.type = NCSI_PKT_CMD_EBF;
1065 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
1066
1067
1068
1069
1070 if (nc->caps[NCSI_CAP_GENERIC].cap &
1071 NCSI_CAP_GENERIC_MC)
1072 nd->state = ncsi_dev_state_config_dgmf;
1073 else if (ncsi_channel_is_tx(ndp, nc))
1074 nd->state = ncsi_dev_state_config_ecnt;
1075 else
1076 nd->state = ncsi_dev_state_config_ec;
1077 } else if (nd->state == ncsi_dev_state_config_dgmf) {
1078 nca.type = NCSI_PKT_CMD_DGMF;
1079 if (ncsi_channel_is_tx(ndp, nc))
1080 nd->state = ncsi_dev_state_config_ecnt;
1081 else
1082 nd->state = ncsi_dev_state_config_ec;
1083 } else if (nd->state == ncsi_dev_state_config_ecnt) {
1084 if (np->preferred_channel &&
1085 nc != np->preferred_channel)
1086 netdev_info(ndp->ndev.dev,
1087 "NCSI: Tx failed over to channel %u\n",
1088 nc->id);
1089 nca.type = NCSI_PKT_CMD_ECNT;
1090 nd->state = ncsi_dev_state_config_ec;
1091 } else if (nd->state == ncsi_dev_state_config_ec) {
1092
1093 nca.type = NCSI_PKT_CMD_EC;
1094 nd->state = ncsi_dev_state_config_ae;
1095 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
1096 nd->state = ncsi_dev_state_config_gls;
1097 } else if (nd->state == ncsi_dev_state_config_ae) {
1098 nca.type = NCSI_PKT_CMD_AE;
1099 nca.bytes[0] = 0;
1100 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
1101 nd->state = ncsi_dev_state_config_gls;
1102 } else if (nd->state == ncsi_dev_state_config_gls) {
1103 nca.type = NCSI_PKT_CMD_GLS;
1104 nd->state = ncsi_dev_state_config_done;
1105 }
1106
1107 ret = ncsi_xmit_cmd(&nca);
1108 if (ret) {
1109 netdev_err(ndp->ndev.dev,
1110 "NCSI: Failed to transmit CMD %x\n",
1111 nca.type);
1112 goto error;
1113 }
1114 break;
1115 case ncsi_dev_state_config_done:
1116 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
1117 nc->id);
1118 spin_lock_irqsave(&nc->lock, flags);
1119 nc->state = NCSI_CHANNEL_ACTIVE;
1120
1121 if (ndp->flags & NCSI_DEV_RESET) {
1122
1123 nc->reconfigure_needed = false;
1124 spin_unlock_irqrestore(&nc->lock, flags);
1125 ncsi_reset_dev(nd);
1126 break;
1127 }
1128
1129 if (nc->reconfigure_needed) {
1130
1131
1132
1133
1134 nc->reconfigure_needed = false;
1135 nc->state = NCSI_CHANNEL_INACTIVE;
1136 spin_unlock_irqrestore(&nc->lock, flags);
1137
1138 spin_lock_irqsave(&ndp->lock, flags);
1139 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1140 spin_unlock_irqrestore(&ndp->lock, flags);
1141
1142 netdev_dbg(dev, "Dirty NCSI channel state reset\n");
1143 ncsi_process_next_channel(ndp);
1144 break;
1145 }
1146
1147 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
1148 hot_nc = nc;
1149 } else {
1150 hot_nc = NULL;
1151 netdev_dbg(ndp->ndev.dev,
1152 "NCSI: channel %u link down after config\n",
1153 nc->id);
1154 }
1155 spin_unlock_irqrestore(&nc->lock, flags);
1156
1157
1158 spin_lock_irqsave(&ndp->lock, flags);
1159 ndp->hot_channel = hot_nc;
1160 spin_unlock_irqrestore(&ndp->lock, flags);
1161
1162 ncsi_start_channel_monitor(nc);
1163 ncsi_process_next_channel(ndp);
1164 break;
1165 default:
1166 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
1167 nd->state);
1168 }
1169
1170 return;
1171
1172error:
1173 ncsi_report_link(ndp, true);
1174}
1175
1176static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
1177{
1178 struct ncsi_channel *nc, *found, *hot_nc;
1179 struct ncsi_channel_mode *ncm;
1180 unsigned long flags, cflags;
1181 struct ncsi_package *np;
1182 bool with_link;
1183
1184 spin_lock_irqsave(&ndp->lock, flags);
1185 hot_nc = ndp->hot_channel;
1186 spin_unlock_irqrestore(&ndp->lock, flags);
1187
1188
1189
1190
1191
1192
1193 found = NULL;
1194 with_link = false;
1195 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1196 if (!(ndp->package_whitelist & (0x1 << np->id)))
1197 continue;
1198 NCSI_FOR_EACH_CHANNEL(np, nc) {
1199 if (!(np->channel_whitelist & (0x1 << nc->id)))
1200 continue;
1201
1202 spin_lock_irqsave(&nc->lock, cflags);
1203
1204 if (!list_empty(&nc->link) ||
1205 nc->state != NCSI_CHANNEL_INACTIVE) {
1206 spin_unlock_irqrestore(&nc->lock, cflags);
1207 continue;
1208 }
1209
1210 if (!found)
1211 found = nc;
1212
1213 if (nc == hot_nc)
1214 found = nc;
1215
1216 ncm = &nc->modes[NCSI_MODE_LINK];
1217 if (ncm->data[2] & 0x1) {
1218 found = nc;
1219 with_link = true;
1220 }
1221
1222
1223
1224
1225
1226 if (with_link || np->multi_channel) {
1227 spin_lock_irqsave(&ndp->lock, flags);
1228 list_add_tail_rcu(&nc->link,
1229 &ndp->channel_queue);
1230 spin_unlock_irqrestore(&ndp->lock, flags);
1231
1232 netdev_dbg(ndp->ndev.dev,
1233 "NCSI: Channel %u added to queue (link %s)\n",
1234 nc->id,
1235 ncm->data[2] & 0x1 ? "up" : "down");
1236 }
1237
1238 spin_unlock_irqrestore(&nc->lock, cflags);
1239
1240 if (with_link && !np->multi_channel)
1241 break;
1242 }
1243 if (with_link && !ndp->multi_package)
1244 break;
1245 }
1246
1247 if (list_empty(&ndp->channel_queue) && found) {
1248 netdev_info(ndp->ndev.dev,
1249 "NCSI: No channel with link found, configuring channel %u\n",
1250 found->id);
1251 spin_lock_irqsave(&ndp->lock, flags);
1252 list_add_tail_rcu(&found->link, &ndp->channel_queue);
1253 spin_unlock_irqrestore(&ndp->lock, flags);
1254 } else if (!found) {
1255 netdev_warn(ndp->ndev.dev,
1256 "NCSI: No channel found to configure!\n");
1257 ncsi_report_link(ndp, true);
1258 return -ENODEV;
1259 }
1260
1261 return ncsi_process_next_channel(ndp);
1262}
1263
1264static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
1265{
1266 struct ncsi_package *np;
1267 struct ncsi_channel *nc;
1268 unsigned int cap;
1269 bool has_channel = false;
1270
1271
1272
1273
1274 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1275 NCSI_FOR_EACH_CHANNEL(np, nc) {
1276 has_channel = true;
1277
1278 cap = nc->caps[NCSI_CAP_GENERIC].cap;
1279 if (!(cap & NCSI_CAP_GENERIC_HWA) ||
1280 (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
1281 NCSI_CAP_GENERIC_HWA_SUPPORT) {
1282 ndp->flags &= ~NCSI_DEV_HWA;
1283 return false;
1284 }
1285 }
1286 }
1287
1288 if (has_channel) {
1289 ndp->flags |= NCSI_DEV_HWA;
1290 return true;
1291 }
1292
1293 ndp->flags &= ~NCSI_DEV_HWA;
1294 return false;
1295}
1296
1297static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
1298{
1299 struct ncsi_dev *nd = &ndp->ndev;
1300 struct ncsi_package *np;
1301 struct ncsi_channel *nc;
1302 struct ncsi_cmd_arg nca;
1303 unsigned char index;
1304 int ret;
1305
1306 nca.ndp = ndp;
1307 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
1308 switch (nd->state) {
1309 case ncsi_dev_state_probe:
1310 nd->state = ncsi_dev_state_probe_deselect;
1311 fallthrough;
1312 case ncsi_dev_state_probe_deselect:
1313 ndp->pending_req_num = 8;
1314
1315
1316 nca.type = NCSI_PKT_CMD_DP;
1317 nca.channel = NCSI_RESERVED_CHANNEL;
1318 for (index = 0; index < 8; index++) {
1319 nca.package = index;
1320 ret = ncsi_xmit_cmd(&nca);
1321 if (ret)
1322 goto error;
1323 }
1324
1325 nd->state = ncsi_dev_state_probe_package;
1326 break;
1327 case ncsi_dev_state_probe_package:
1328 ndp->pending_req_num = 1;
1329
1330 nca.type = NCSI_PKT_CMD_SP;
1331 nca.bytes[0] = 1;
1332 nca.package = ndp->package_probe_id;
1333 nca.channel = NCSI_RESERVED_CHANNEL;
1334 ret = ncsi_xmit_cmd(&nca);
1335 if (ret)
1336 goto error;
1337 nd->state = ncsi_dev_state_probe_channel;
1338 break;
1339 case ncsi_dev_state_probe_channel:
1340 ndp->active_package = ncsi_find_package(ndp,
1341 ndp->package_probe_id);
1342 if (!ndp->active_package) {
1343
1344 nd->state = ncsi_dev_state_probe_dp;
1345 schedule_work(&ndp->work);
1346 break;
1347 }
1348 nd->state = ncsi_dev_state_probe_cis;
1349 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) &&
1350 ndp->mlx_multi_host)
1351 nd->state = ncsi_dev_state_probe_mlx_gma;
1352
1353 schedule_work(&ndp->work);
1354 break;
1355#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
1356 case ncsi_dev_state_probe_mlx_gma:
1357 ndp->pending_req_num = 1;
1358
1359 nca.type = NCSI_PKT_CMD_OEM;
1360 nca.package = ndp->active_package->id;
1361 nca.channel = 0;
1362 ret = ncsi_oem_gma_handler_mlx(&nca);
1363 if (ret)
1364 goto error;
1365
1366 nd->state = ncsi_dev_state_probe_mlx_smaf;
1367 break;
1368 case ncsi_dev_state_probe_mlx_smaf:
1369 ndp->pending_req_num = 1;
1370
1371 nca.type = NCSI_PKT_CMD_OEM;
1372 nca.package = ndp->active_package->id;
1373 nca.channel = 0;
1374 ret = ncsi_oem_smaf_mlx(&nca);
1375 if (ret)
1376 goto error;
1377
1378 nd->state = ncsi_dev_state_probe_cis;
1379 break;
1380#endif
1381 case ncsi_dev_state_probe_cis:
1382 ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
1383
1384
1385 nca.type = NCSI_PKT_CMD_CIS;
1386 nca.package = ndp->active_package->id;
1387 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
1388 nca.channel = index;
1389 ret = ncsi_xmit_cmd(&nca);
1390 if (ret)
1391 goto error;
1392 }
1393
1394 nd->state = ncsi_dev_state_probe_gvi;
1395 break;
1396 case ncsi_dev_state_probe_gvi:
1397 case ncsi_dev_state_probe_gc:
1398 case ncsi_dev_state_probe_gls:
1399 np = ndp->active_package;
1400 ndp->pending_req_num = np->channel_num;
1401
1402
1403 if (nd->state == ncsi_dev_state_probe_gvi)
1404 nca.type = NCSI_PKT_CMD_GVI;
1405 else if (nd->state == ncsi_dev_state_probe_gc)
1406 nca.type = NCSI_PKT_CMD_GC;
1407 else
1408 nca.type = NCSI_PKT_CMD_GLS;
1409
1410 nca.package = np->id;
1411 NCSI_FOR_EACH_CHANNEL(np, nc) {
1412 nca.channel = nc->id;
1413 ret = ncsi_xmit_cmd(&nca);
1414 if (ret)
1415 goto error;
1416 }
1417
1418 if (nd->state == ncsi_dev_state_probe_gvi)
1419 nd->state = ncsi_dev_state_probe_gc;
1420 else if (nd->state == ncsi_dev_state_probe_gc)
1421 nd->state = ncsi_dev_state_probe_gls;
1422 else
1423 nd->state = ncsi_dev_state_probe_dp;
1424 break;
1425 case ncsi_dev_state_probe_dp:
1426 ndp->pending_req_num = 1;
1427
1428
1429 nca.type = NCSI_PKT_CMD_DP;
1430 nca.package = ndp->package_probe_id;
1431 nca.channel = NCSI_RESERVED_CHANNEL;
1432 ret = ncsi_xmit_cmd(&nca);
1433 if (ret)
1434 goto error;
1435
1436
1437 ndp->package_probe_id++;
1438 if (ndp->package_probe_id >= 8) {
1439
1440 ndp->flags |= NCSI_DEV_PROBED;
1441 break;
1442 }
1443 nd->state = ncsi_dev_state_probe_package;
1444 ndp->active_package = NULL;
1445 break;
1446 default:
1447 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
1448 nd->state);
1449 }
1450
1451 if (ndp->flags & NCSI_DEV_PROBED) {
1452
1453 ncsi_check_hwa(ndp);
1454 ncsi_choose_active_channel(ndp);
1455 }
1456
1457 return;
1458error:
1459 netdev_err(ndp->ndev.dev,
1460 "NCSI: Failed to transmit cmd 0x%x during probe\n",
1461 nca.type);
1462 ncsi_report_link(ndp, true);
1463}
1464
1465static void ncsi_dev_work(struct work_struct *work)
1466{
1467 struct ncsi_dev_priv *ndp = container_of(work,
1468 struct ncsi_dev_priv, work);
1469 struct ncsi_dev *nd = &ndp->ndev;
1470
1471 switch (nd->state & ncsi_dev_state_major) {
1472 case ncsi_dev_state_probe:
1473 ncsi_probe_channel(ndp);
1474 break;
1475 case ncsi_dev_state_suspend:
1476 ncsi_suspend_channel(ndp);
1477 break;
1478 case ncsi_dev_state_config:
1479 ncsi_configure_channel(ndp);
1480 break;
1481 default:
1482 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
1483 nd->state);
1484 }
1485}
1486
1487int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
1488{
1489 struct ncsi_channel *nc;
1490 int old_state;
1491 unsigned long flags;
1492
1493 spin_lock_irqsave(&ndp->lock, flags);
1494 nc = list_first_or_null_rcu(&ndp->channel_queue,
1495 struct ncsi_channel, link);
1496 if (!nc) {
1497 spin_unlock_irqrestore(&ndp->lock, flags);
1498 goto out;
1499 }
1500
1501 list_del_init(&nc->link);
1502 spin_unlock_irqrestore(&ndp->lock, flags);
1503
1504 spin_lock_irqsave(&nc->lock, flags);
1505 old_state = nc->state;
1506 nc->state = NCSI_CHANNEL_INVISIBLE;
1507 spin_unlock_irqrestore(&nc->lock, flags);
1508
1509 ndp->active_channel = nc;
1510 ndp->active_package = nc->package;
1511
1512 switch (old_state) {
1513 case NCSI_CHANNEL_INACTIVE:
1514 ndp->ndev.state = ncsi_dev_state_config;
1515 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
1516 nc->id);
1517 ncsi_configure_channel(ndp);
1518 break;
1519 case NCSI_CHANNEL_ACTIVE:
1520 ndp->ndev.state = ncsi_dev_state_suspend;
1521 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
1522 nc->id);
1523 ncsi_suspend_channel(ndp);
1524 break;
1525 default:
1526 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
1527 old_state, nc->package->id, nc->id);
1528 ncsi_report_link(ndp, false);
1529 return -EINVAL;
1530 }
1531
1532 return 0;
1533
1534out:
1535 ndp->active_channel = NULL;
1536 ndp->active_package = NULL;
1537 if (ndp->flags & NCSI_DEV_RESHUFFLE) {
1538 ndp->flags &= ~NCSI_DEV_RESHUFFLE;
1539 return ncsi_choose_active_channel(ndp);
1540 }
1541
1542 ncsi_report_link(ndp, false);
1543 return -ENODEV;
1544}
1545
1546static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
1547{
1548 struct ncsi_dev *nd = &ndp->ndev;
1549 struct ncsi_channel *nc;
1550 struct ncsi_package *np;
1551 unsigned long flags;
1552 unsigned int n = 0;
1553
1554 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1555 NCSI_FOR_EACH_CHANNEL(np, nc) {
1556 spin_lock_irqsave(&nc->lock, flags);
1557
1558
1559
1560
1561
1562
1563
1564 if (nc->state != NCSI_CHANNEL_ACTIVE) {
1565 if ((ndp->ndev.state & 0xff00) ==
1566 ncsi_dev_state_config ||
1567 !list_empty(&nc->link)) {
1568 netdev_dbg(nd->dev,
1569 "NCSI: channel %p marked dirty\n",
1570 nc);
1571 nc->reconfigure_needed = true;
1572 }
1573 spin_unlock_irqrestore(&nc->lock, flags);
1574 continue;
1575 }
1576
1577 spin_unlock_irqrestore(&nc->lock, flags);
1578
1579 ncsi_stop_channel_monitor(nc);
1580 spin_lock_irqsave(&nc->lock, flags);
1581 nc->state = NCSI_CHANNEL_INACTIVE;
1582 spin_unlock_irqrestore(&nc->lock, flags);
1583
1584 spin_lock_irqsave(&ndp->lock, flags);
1585 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1586 spin_unlock_irqrestore(&ndp->lock, flags);
1587
1588 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
1589 n++;
1590 }
1591 }
1592
1593 return n;
1594}
1595
1596int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1597{
1598 struct ncsi_dev_priv *ndp;
1599 unsigned int n_vids = 0;
1600 struct vlan_vid *vlan;
1601 struct ncsi_dev *nd;
1602 bool found = false;
1603
1604 if (vid == 0)
1605 return 0;
1606
1607 nd = ncsi_find_dev(dev);
1608 if (!nd) {
1609 netdev_warn(dev, "NCSI: No net_device?\n");
1610 return 0;
1611 }
1612
1613 ndp = TO_NCSI_DEV_PRIV(nd);
1614
1615
1616 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
1617 n_vids++;
1618 if (vlan->vid == vid) {
1619 netdev_dbg(dev, "NCSI: vid %u already registered\n",
1620 vid);
1621 return 0;
1622 }
1623 }
1624 if (n_vids >= NCSI_MAX_VLAN_VIDS) {
1625 netdev_warn(dev,
1626 "tried to add vlan id %u but NCSI max already registered (%u)\n",
1627 vid, NCSI_MAX_VLAN_VIDS);
1628 return -ENOSPC;
1629 }
1630
1631 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1632 if (!vlan)
1633 return -ENOMEM;
1634
1635 vlan->proto = proto;
1636 vlan->vid = vid;
1637 list_add_rcu(&vlan->list, &ndp->vlan_vids);
1638
1639 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
1640
1641 found = ncsi_kick_channels(ndp) != 0;
1642
1643 return found ? ncsi_process_next_channel(ndp) : 0;
1644}
1645EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
1646
1647int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1648{
1649 struct vlan_vid *vlan, *tmp;
1650 struct ncsi_dev_priv *ndp;
1651 struct ncsi_dev *nd;
1652 bool found = false;
1653
1654 if (vid == 0)
1655 return 0;
1656
1657 nd = ncsi_find_dev(dev);
1658 if (!nd) {
1659 netdev_warn(dev, "NCSI: no net_device?\n");
1660 return 0;
1661 }
1662
1663 ndp = TO_NCSI_DEV_PRIV(nd);
1664
1665
1666 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
1667 if (vlan->vid == vid) {
1668 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
1669 list_del_rcu(&vlan->list);
1670 found = true;
1671 kfree(vlan);
1672 }
1673
1674 if (!found) {
1675 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
1676 return -EINVAL;
1677 }
1678
1679 found = ncsi_kick_channels(ndp) != 0;
1680
1681 return found ? ncsi_process_next_channel(ndp) : 0;
1682}
1683EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
1684
1685struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
1686 void (*handler)(struct ncsi_dev *ndev))
1687{
1688 struct ncsi_dev_priv *ndp;
1689 struct ncsi_dev *nd;
1690 struct platform_device *pdev;
1691 struct device_node *np;
1692 unsigned long flags;
1693 int i;
1694
1695
1696 nd = ncsi_find_dev(dev);
1697 if (nd)
1698 return nd;
1699
1700
1701 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
1702 if (!ndp)
1703 return NULL;
1704
1705 nd = &ndp->ndev;
1706 nd->state = ncsi_dev_state_registered;
1707 nd->dev = dev;
1708 nd->handler = handler;
1709 ndp->pending_req_num = 0;
1710 INIT_LIST_HEAD(&ndp->channel_queue);
1711 INIT_LIST_HEAD(&ndp->vlan_vids);
1712 INIT_WORK(&ndp->work, ncsi_dev_work);
1713 ndp->package_whitelist = UINT_MAX;
1714
1715
1716 spin_lock_init(&ndp->lock);
1717 INIT_LIST_HEAD(&ndp->packages);
1718 ndp->request_id = NCSI_REQ_START_IDX;
1719 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
1720 ndp->requests[i].id = i;
1721 ndp->requests[i].ndp = ndp;
1722 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
1723 }
1724
1725 spin_lock_irqsave(&ncsi_dev_lock, flags);
1726 list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
1727 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1728
1729
1730 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
1731 ndp->ptype.func = ncsi_rcv_rsp;
1732 ndp->ptype.dev = dev;
1733 dev_add_pack(&ndp->ptype);
1734
1735 pdev = to_platform_device(dev->dev.parent);
1736 if (pdev) {
1737 np = pdev->dev.of_node;
1738 if (np && of_get_property(np, "mlx,multi-host", NULL))
1739 ndp->mlx_multi_host = true;
1740 }
1741
1742 return nd;
1743}
1744EXPORT_SYMBOL_GPL(ncsi_register_dev);
1745
1746int ncsi_start_dev(struct ncsi_dev *nd)
1747{
1748 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1749
1750 if (nd->state != ncsi_dev_state_registered &&
1751 nd->state != ncsi_dev_state_functional)
1752 return -ENOTTY;
1753
1754 if (!(ndp->flags & NCSI_DEV_PROBED)) {
1755 ndp->package_probe_id = 0;
1756 nd->state = ncsi_dev_state_probe;
1757 schedule_work(&ndp->work);
1758 return 0;
1759 }
1760
1761 return ncsi_reset_dev(nd);
1762}
1763EXPORT_SYMBOL_GPL(ncsi_start_dev);
1764
1765void ncsi_stop_dev(struct ncsi_dev *nd)
1766{
1767 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1768 struct ncsi_package *np;
1769 struct ncsi_channel *nc;
1770 bool chained;
1771 int old_state;
1772 unsigned long flags;
1773
1774
1775
1776
1777
1778 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1779 NCSI_FOR_EACH_CHANNEL(np, nc) {
1780 ncsi_stop_channel_monitor(nc);
1781
1782 spin_lock_irqsave(&nc->lock, flags);
1783 chained = !list_empty(&nc->link);
1784 old_state = nc->state;
1785 spin_unlock_irqrestore(&nc->lock, flags);
1786
1787 WARN_ON_ONCE(chained ||
1788 old_state == NCSI_CHANNEL_INVISIBLE);
1789 }
1790 }
1791
1792 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
1793 ncsi_report_link(ndp, true);
1794}
1795EXPORT_SYMBOL_GPL(ncsi_stop_dev);
1796
1797int ncsi_reset_dev(struct ncsi_dev *nd)
1798{
1799 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1800 struct ncsi_channel *nc, *active, *tmp;
1801 struct ncsi_package *np;
1802 unsigned long flags;
1803
1804 spin_lock_irqsave(&ndp->lock, flags);
1805
1806 if (!(ndp->flags & NCSI_DEV_RESET)) {
1807
1808 switch (nd->state & ncsi_dev_state_major) {
1809 case ncsi_dev_state_registered:
1810 case ncsi_dev_state_probe:
1811
1812 spin_unlock_irqrestore(&ndp->lock, flags);
1813 return 0;
1814 case ncsi_dev_state_suspend:
1815 case ncsi_dev_state_config:
1816
1817
1818
1819
1820 ndp->flags |= NCSI_DEV_RESET;
1821 spin_unlock_irqrestore(&ndp->lock, flags);
1822 return 0;
1823 }
1824 } else {
1825 switch (nd->state) {
1826 case ncsi_dev_state_suspend_done:
1827 case ncsi_dev_state_config_done:
1828 case ncsi_dev_state_functional:
1829
1830 break;
1831 default:
1832
1833 spin_unlock_irqrestore(&ndp->lock, flags);
1834 return 0;
1835 }
1836 }
1837
1838 if (!list_empty(&ndp->channel_queue)) {
1839
1840 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
1841 list_del_init(&nc->link);
1842 }
1843 spin_unlock_irqrestore(&ndp->lock, flags);
1844
1845 active = NULL;
1846 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1847 NCSI_FOR_EACH_CHANNEL(np, nc) {
1848 spin_lock_irqsave(&nc->lock, flags);
1849
1850 if (nc->state == NCSI_CHANNEL_ACTIVE) {
1851 active = nc;
1852 nc->state = NCSI_CHANNEL_INVISIBLE;
1853 spin_unlock_irqrestore(&nc->lock, flags);
1854 ncsi_stop_channel_monitor(nc);
1855 break;
1856 }
1857
1858 spin_unlock_irqrestore(&nc->lock, flags);
1859 }
1860 if (active)
1861 break;
1862 }
1863
1864 if (!active) {
1865
1866 spin_lock_irqsave(&ndp->lock, flags);
1867 ndp->flags &= ~NCSI_DEV_RESET;
1868 spin_unlock_irqrestore(&ndp->lock, flags);
1869 return ncsi_choose_active_channel(ndp);
1870 }
1871
1872 spin_lock_irqsave(&ndp->lock, flags);
1873 ndp->flags |= NCSI_DEV_RESET;
1874 ndp->active_channel = active;
1875 ndp->active_package = active->package;
1876 spin_unlock_irqrestore(&ndp->lock, flags);
1877
1878 nd->state = ncsi_dev_state_suspend;
1879 schedule_work(&ndp->work);
1880 return 0;
1881}
1882
1883void ncsi_unregister_dev(struct ncsi_dev *nd)
1884{
1885 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1886 struct ncsi_package *np, *tmp;
1887 unsigned long flags;
1888
1889 dev_remove_pack(&ndp->ptype);
1890
1891 list_for_each_entry_safe(np, tmp, &ndp->packages, node)
1892 ncsi_remove_package(np);
1893
1894 spin_lock_irqsave(&ncsi_dev_lock, flags);
1895 list_del_rcu(&ndp->node);
1896 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1897
1898 kfree(ndp);
1899}
1900EXPORT_SYMBOL_GPL(ncsi_unregister_dev);
1901
