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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_KEEP_PHY)
693
694static int ncsi_oem_keep_phy_intel(struct ncsi_cmd_arg *nca)
695{
696 unsigned char data[NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN];
697 int ret = 0;
698
699 nca->payload = NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN;
700
701 memset(data, 0, NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN);
702 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID);
703
704 data[4] = NCSI_OEM_INTEL_CMD_KEEP_PHY;
705
706
707 data[6] = 0x1;
708
709 nca->data = data;
710
711 ret = ncsi_xmit_cmd(nca);
712 if (ret)
713 netdev_err(nca->ndp->ndev.dev,
714 "NCSI: Failed to transmit cmd 0x%x during configure\n",
715 nca->type);
716 return ret;
717}
718
719#endif
720
721#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
722
723
724static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
725{
726 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
727 int ret = 0;
728
729 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
730
731 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
732 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_BCM_ID);
733 data[5] = NCSI_OEM_BCM_CMD_GMA;
734
735 nca->data = data;
736
737 ret = ncsi_xmit_cmd(nca);
738 if (ret)
739 netdev_err(nca->ndp->ndev.dev,
740 "NCSI: Failed to transmit cmd 0x%x during configure\n",
741 nca->type);
742 return ret;
743}
744
745static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
746{
747 union {
748 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
749 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
750 } u;
751 int ret = 0;
752
753 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
754
755 memset(&u, 0, sizeof(u));
756 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID);
757 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
758 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
759
760 nca->data = u.data_u8;
761
762 ret = ncsi_xmit_cmd(nca);
763 if (ret)
764 netdev_err(nca->ndp->ndev.dev,
765 "NCSI: Failed to transmit cmd 0x%x during configure\n",
766 nca->type);
767 return ret;
768}
769
770static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca)
771{
772 union {
773 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN];
774 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)];
775 } u;
776 int ret = 0;
777
778 memset(&u, 0, sizeof(u));
779 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID);
780 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF;
781 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM;
782 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET],
783 nca->ndp->ndev.dev->dev_addr, ETH_ALEN);
784 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] =
785 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT);
786
787 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN;
788 nca->data = u.data_u8;
789
790 ret = ncsi_xmit_cmd(nca);
791 if (ret)
792 netdev_err(nca->ndp->ndev.dev,
793 "NCSI: Failed to transmit cmd 0x%x during probe\n",
794 nca->type);
795 return ret;
796}
797
798
799static struct ncsi_oem_gma_handler {
800 unsigned int mfr_id;
801 int (*handler)(struct ncsi_cmd_arg *nca);
802} ncsi_oem_gma_handlers[] = {
803 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
804 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }
805};
806
807static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
808{
809 struct ncsi_oem_gma_handler *nch = NULL;
810 int i;
811
812
813 if (nca->ndp->gma_flag == 1)
814 return -1;
815
816
817 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
818 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
819 if (ncsi_oem_gma_handlers[i].handler)
820 nch = &ncsi_oem_gma_handlers[i];
821 break;
822 }
823 }
824
825 if (!nch) {
826 netdev_err(nca->ndp->ndev.dev,
827 "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
828 mf_id);
829 return -1;
830 }
831
832
833 return nch->handler(nca);
834}
835
836#endif
837
838
839static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
840 struct ncsi_channel *nc)
841{
842 struct ncsi_channel_mode *ncm;
843 struct ncsi_channel *channel;
844 struct ncsi_package *np;
845
846
847
848
849 NCSI_FOR_EACH_PACKAGE(ndp, np) {
850 if (!ndp->multi_package && np != nc->package)
851 continue;
852 NCSI_FOR_EACH_CHANNEL(np, channel) {
853 ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
854 if (ncm->enable)
855 return false;
856 }
857 }
858
859
860 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
861 np = channel->package;
862 if (np->preferred_channel &&
863 ncsi_channel_has_link(np->preferred_channel)) {
864 return np->preferred_channel == nc;
865 }
866 }
867
868
869 if (ncsi_channel_has_link(nc))
870 return true;
871
872 list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
873 if (ncsi_channel_has_link(channel))
874 return false;
875
876
877 return true;
878}
879
880
881int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
882 struct ncsi_package *package,
883 struct ncsi_channel *disable,
884 struct ncsi_channel *enable)
885{
886 struct ncsi_cmd_arg nca;
887 struct ncsi_channel *nc;
888 struct ncsi_package *np;
889 int ret = 0;
890
891 if (!package->multi_channel && !ndp->multi_package)
892 netdev_warn(ndp->ndev.dev,
893 "NCSI: Trying to update Tx channel in single-channel mode\n");
894 nca.ndp = ndp;
895 nca.req_flags = 0;
896
897
898 NCSI_FOR_EACH_PACKAGE(ndp, np) {
899 if (disable)
900 break;
901 if (!ndp->multi_package && np != package)
902 continue;
903
904 NCSI_FOR_EACH_CHANNEL(np, nc)
905 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
906 disable = nc;
907 break;
908 }
909 }
910
911
912 NCSI_FOR_EACH_PACKAGE(ndp, np) {
913 if (enable)
914 break;
915 if (!ndp->multi_package && np != package)
916 continue;
917 if (!(ndp->package_whitelist & (0x1 << np->id)))
918 continue;
919
920 if (np->preferred_channel &&
921 ncsi_channel_has_link(np->preferred_channel)) {
922 enable = np->preferred_channel;
923 break;
924 }
925
926 NCSI_FOR_EACH_CHANNEL(np, nc) {
927 if (!(np->channel_whitelist & 0x1 << nc->id))
928 continue;
929 if (nc->state != NCSI_CHANNEL_ACTIVE)
930 continue;
931 if (ncsi_channel_has_link(nc)) {
932 enable = nc;
933 break;
934 }
935 }
936 }
937
938 if (disable == enable)
939 return -1;
940
941 if (!enable)
942 return -1;
943
944 if (disable) {
945 nca.channel = disable->id;
946 nca.package = disable->package->id;
947 nca.type = NCSI_PKT_CMD_DCNT;
948 ret = ncsi_xmit_cmd(&nca);
949 if (ret)
950 netdev_err(ndp->ndev.dev,
951 "Error %d sending DCNT\n",
952 ret);
953 }
954
955 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
956
957 nca.channel = enable->id;
958 nca.package = enable->package->id;
959 nca.type = NCSI_PKT_CMD_ECNT;
960 ret = ncsi_xmit_cmd(&nca);
961 if (ret)
962 netdev_err(ndp->ndev.dev,
963 "Error %d sending ECNT\n",
964 ret);
965
966 return ret;
967}
968
969static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
970{
971 struct ncsi_package *np = ndp->active_package;
972 struct ncsi_channel *nc = ndp->active_channel;
973 struct ncsi_channel *hot_nc = NULL;
974 struct ncsi_dev *nd = &ndp->ndev;
975 struct net_device *dev = nd->dev;
976 struct ncsi_cmd_arg nca;
977 unsigned char index;
978 unsigned long flags;
979 int ret;
980
981 nca.ndp = ndp;
982 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
983 switch (nd->state) {
984 case ncsi_dev_state_config:
985 case ncsi_dev_state_config_sp:
986 ndp->pending_req_num = 1;
987
988
989 nca.type = NCSI_PKT_CMD_SP;
990 if (ndp->flags & NCSI_DEV_HWA)
991 nca.bytes[0] = 0;
992 else
993 nca.bytes[0] = 1;
994 nca.package = np->id;
995 nca.channel = NCSI_RESERVED_CHANNEL;
996 ret = ncsi_xmit_cmd(&nca);
997 if (ret) {
998 netdev_err(ndp->ndev.dev,
999 "NCSI: Failed to transmit CMD_SP\n");
1000 goto error;
1001 }
1002
1003 nd->state = ncsi_dev_state_config_cis;
1004 break;
1005 case ncsi_dev_state_config_cis:
1006 ndp->pending_req_num = 1;
1007
1008
1009 nca.type = NCSI_PKT_CMD_CIS;
1010 nca.package = np->id;
1011 nca.channel = nc->id;
1012 ret = ncsi_xmit_cmd(&nca);
1013 if (ret) {
1014 netdev_err(ndp->ndev.dev,
1015 "NCSI: Failed to transmit CMD_CIS\n");
1016 goto error;
1017 }
1018
1019 nd->state = ncsi_dev_state_config_oem_gma;
1020 break;
1021 case ncsi_dev_state_config_oem_gma:
1022 nd->state = ncsi_dev_state_config_clear_vids;
1023 ret = -1;
1024
1025#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
1026 nca.type = NCSI_PKT_CMD_OEM;
1027 nca.package = np->id;
1028 nca.channel = nc->id;
1029 ndp->pending_req_num = 1;
1030 ret = ncsi_gma_handler(&nca, nc->version.mf_id);
1031#endif
1032
1033 if (ret < 0)
1034 schedule_work(&ndp->work);
1035
1036 break;
1037 case ncsi_dev_state_config_clear_vids:
1038 case ncsi_dev_state_config_svf:
1039 case ncsi_dev_state_config_ev:
1040 case ncsi_dev_state_config_sma:
1041 case ncsi_dev_state_config_ebf:
1042 case ncsi_dev_state_config_dgmf:
1043 case ncsi_dev_state_config_ecnt:
1044 case ncsi_dev_state_config_ec:
1045 case ncsi_dev_state_config_ae:
1046 case ncsi_dev_state_config_gls:
1047 ndp->pending_req_num = 1;
1048
1049 nca.package = np->id;
1050 nca.channel = nc->id;
1051
1052
1053 if (nd->state == ncsi_dev_state_config_clear_vids) {
1054 ret = clear_one_vid(ndp, nc, &nca);
1055 if (ret) {
1056 nd->state = ncsi_dev_state_config_svf;
1057 schedule_work(&ndp->work);
1058 break;
1059 }
1060
1061 nd->state = ncsi_dev_state_config_clear_vids;
1062
1063 } else if (nd->state == ncsi_dev_state_config_svf) {
1064 ret = set_one_vid(ndp, nc, &nca);
1065 if (ret) {
1066 nd->state = ncsi_dev_state_config_ev;
1067 schedule_work(&ndp->work);
1068 break;
1069 }
1070
1071 nd->state = ncsi_dev_state_config_svf;
1072
1073 } else if (nd->state == ncsi_dev_state_config_ev) {
1074 if (list_empty(&ndp->vlan_vids)) {
1075 nca.type = NCSI_PKT_CMD_DV;
1076 } else {
1077 nca.type = NCSI_PKT_CMD_EV;
1078 nca.bytes[3] = NCSI_CAP_VLAN_NO;
1079 }
1080 nd->state = ncsi_dev_state_config_sma;
1081 } else if (nd->state == ncsi_dev_state_config_sma) {
1082
1083
1084
1085
1086 nca.type = NCSI_PKT_CMD_SMA;
1087 for (index = 0; index < 6; index++)
1088 nca.bytes[index] = dev->dev_addr[index];
1089 nca.bytes[6] = 0x1;
1090 nca.bytes[7] = 0x1;
1091 nd->state = ncsi_dev_state_config_ebf;
1092 } else if (nd->state == ncsi_dev_state_config_ebf) {
1093 nca.type = NCSI_PKT_CMD_EBF;
1094 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
1095
1096
1097
1098
1099 if (nc->caps[NCSI_CAP_GENERIC].cap &
1100 NCSI_CAP_GENERIC_MC)
1101 nd->state = ncsi_dev_state_config_dgmf;
1102 else if (ncsi_channel_is_tx(ndp, nc))
1103 nd->state = ncsi_dev_state_config_ecnt;
1104 else
1105 nd->state = ncsi_dev_state_config_ec;
1106 } else if (nd->state == ncsi_dev_state_config_dgmf) {
1107 nca.type = NCSI_PKT_CMD_DGMF;
1108 if (ncsi_channel_is_tx(ndp, nc))
1109 nd->state = ncsi_dev_state_config_ecnt;
1110 else
1111 nd->state = ncsi_dev_state_config_ec;
1112 } else if (nd->state == ncsi_dev_state_config_ecnt) {
1113 if (np->preferred_channel &&
1114 nc != np->preferred_channel)
1115 netdev_info(ndp->ndev.dev,
1116 "NCSI: Tx failed over to channel %u\n",
1117 nc->id);
1118 nca.type = NCSI_PKT_CMD_ECNT;
1119 nd->state = ncsi_dev_state_config_ec;
1120 } else if (nd->state == ncsi_dev_state_config_ec) {
1121
1122 nca.type = NCSI_PKT_CMD_EC;
1123 nd->state = ncsi_dev_state_config_ae;
1124 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
1125 nd->state = ncsi_dev_state_config_gls;
1126 } else if (nd->state == ncsi_dev_state_config_ae) {
1127 nca.type = NCSI_PKT_CMD_AE;
1128 nca.bytes[0] = 0;
1129 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
1130 nd->state = ncsi_dev_state_config_gls;
1131 } else if (nd->state == ncsi_dev_state_config_gls) {
1132 nca.type = NCSI_PKT_CMD_GLS;
1133 nd->state = ncsi_dev_state_config_done;
1134 }
1135
1136 ret = ncsi_xmit_cmd(&nca);
1137 if (ret) {
1138 netdev_err(ndp->ndev.dev,
1139 "NCSI: Failed to transmit CMD %x\n",
1140 nca.type);
1141 goto error;
1142 }
1143 break;
1144 case ncsi_dev_state_config_done:
1145 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
1146 nc->id);
1147 spin_lock_irqsave(&nc->lock, flags);
1148 nc->state = NCSI_CHANNEL_ACTIVE;
1149
1150 if (ndp->flags & NCSI_DEV_RESET) {
1151
1152 nc->reconfigure_needed = false;
1153 spin_unlock_irqrestore(&nc->lock, flags);
1154 ncsi_reset_dev(nd);
1155 break;
1156 }
1157
1158 if (nc->reconfigure_needed) {
1159
1160
1161
1162
1163 nc->reconfigure_needed = false;
1164 nc->state = NCSI_CHANNEL_INACTIVE;
1165 spin_unlock_irqrestore(&nc->lock, flags);
1166
1167 spin_lock_irqsave(&ndp->lock, flags);
1168 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1169 spin_unlock_irqrestore(&ndp->lock, flags);
1170
1171 netdev_dbg(dev, "Dirty NCSI channel state reset\n");
1172 ncsi_process_next_channel(ndp);
1173 break;
1174 }
1175
1176 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
1177 hot_nc = nc;
1178 } else {
1179 hot_nc = NULL;
1180 netdev_dbg(ndp->ndev.dev,
1181 "NCSI: channel %u link down after config\n",
1182 nc->id);
1183 }
1184 spin_unlock_irqrestore(&nc->lock, flags);
1185
1186
1187 spin_lock_irqsave(&ndp->lock, flags);
1188 ndp->hot_channel = hot_nc;
1189 spin_unlock_irqrestore(&ndp->lock, flags);
1190
1191 ncsi_start_channel_monitor(nc);
1192 ncsi_process_next_channel(ndp);
1193 break;
1194 default:
1195 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
1196 nd->state);
1197 }
1198
1199 return;
1200
1201error:
1202 ncsi_report_link(ndp, true);
1203}
1204
1205static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
1206{
1207 struct ncsi_channel *nc, *found, *hot_nc;
1208 struct ncsi_channel_mode *ncm;
1209 unsigned long flags, cflags;
1210 struct ncsi_package *np;
1211 bool with_link;
1212
1213 spin_lock_irqsave(&ndp->lock, flags);
1214 hot_nc = ndp->hot_channel;
1215 spin_unlock_irqrestore(&ndp->lock, flags);
1216
1217
1218
1219
1220
1221
1222 found = NULL;
1223 with_link = false;
1224 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1225 if (!(ndp->package_whitelist & (0x1 << np->id)))
1226 continue;
1227 NCSI_FOR_EACH_CHANNEL(np, nc) {
1228 if (!(np->channel_whitelist & (0x1 << nc->id)))
1229 continue;
1230
1231 spin_lock_irqsave(&nc->lock, cflags);
1232
1233 if (!list_empty(&nc->link) ||
1234 nc->state != NCSI_CHANNEL_INACTIVE) {
1235 spin_unlock_irqrestore(&nc->lock, cflags);
1236 continue;
1237 }
1238
1239 if (!found)
1240 found = nc;
1241
1242 if (nc == hot_nc)
1243 found = nc;
1244
1245 ncm = &nc->modes[NCSI_MODE_LINK];
1246 if (ncm->data[2] & 0x1) {
1247 found = nc;
1248 with_link = true;
1249 }
1250
1251
1252
1253
1254
1255 if (with_link || np->multi_channel) {
1256 spin_lock_irqsave(&ndp->lock, flags);
1257 list_add_tail_rcu(&nc->link,
1258 &ndp->channel_queue);
1259 spin_unlock_irqrestore(&ndp->lock, flags);
1260
1261 netdev_dbg(ndp->ndev.dev,
1262 "NCSI: Channel %u added to queue (link %s)\n",
1263 nc->id,
1264 ncm->data[2] & 0x1 ? "up" : "down");
1265 }
1266
1267 spin_unlock_irqrestore(&nc->lock, cflags);
1268
1269 if (with_link && !np->multi_channel)
1270 break;
1271 }
1272 if (with_link && !ndp->multi_package)
1273 break;
1274 }
1275
1276 if (list_empty(&ndp->channel_queue) && found) {
1277 netdev_info(ndp->ndev.dev,
1278 "NCSI: No channel with link found, configuring channel %u\n",
1279 found->id);
1280 spin_lock_irqsave(&ndp->lock, flags);
1281 list_add_tail_rcu(&found->link, &ndp->channel_queue);
1282 spin_unlock_irqrestore(&ndp->lock, flags);
1283 } else if (!found) {
1284 netdev_warn(ndp->ndev.dev,
1285 "NCSI: No channel found to configure!\n");
1286 ncsi_report_link(ndp, true);
1287 return -ENODEV;
1288 }
1289
1290 return ncsi_process_next_channel(ndp);
1291}
1292
1293static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
1294{
1295 struct ncsi_package *np;
1296 struct ncsi_channel *nc;
1297 unsigned int cap;
1298 bool has_channel = false;
1299
1300
1301
1302
1303 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1304 NCSI_FOR_EACH_CHANNEL(np, nc) {
1305 has_channel = true;
1306
1307 cap = nc->caps[NCSI_CAP_GENERIC].cap;
1308 if (!(cap & NCSI_CAP_GENERIC_HWA) ||
1309 (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
1310 NCSI_CAP_GENERIC_HWA_SUPPORT) {
1311 ndp->flags &= ~NCSI_DEV_HWA;
1312 return false;
1313 }
1314 }
1315 }
1316
1317 if (has_channel) {
1318 ndp->flags |= NCSI_DEV_HWA;
1319 return true;
1320 }
1321
1322 ndp->flags &= ~NCSI_DEV_HWA;
1323 return false;
1324}
1325
1326static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
1327{
1328 struct ncsi_dev *nd = &ndp->ndev;
1329 struct ncsi_package *np;
1330 struct ncsi_channel *nc;
1331 struct ncsi_cmd_arg nca;
1332 unsigned char index;
1333 int ret;
1334
1335 nca.ndp = ndp;
1336 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
1337 switch (nd->state) {
1338 case ncsi_dev_state_probe:
1339 nd->state = ncsi_dev_state_probe_deselect;
1340 fallthrough;
1341 case ncsi_dev_state_probe_deselect:
1342 ndp->pending_req_num = 8;
1343
1344
1345 nca.type = NCSI_PKT_CMD_DP;
1346 nca.channel = NCSI_RESERVED_CHANNEL;
1347 for (index = 0; index < 8; index++) {
1348 nca.package = index;
1349 ret = ncsi_xmit_cmd(&nca);
1350 if (ret)
1351 goto error;
1352 }
1353
1354 nd->state = ncsi_dev_state_probe_package;
1355 break;
1356 case ncsi_dev_state_probe_package:
1357 ndp->pending_req_num = 1;
1358
1359 nca.type = NCSI_PKT_CMD_SP;
1360 nca.bytes[0] = 1;
1361 nca.package = ndp->package_probe_id;
1362 nca.channel = NCSI_RESERVED_CHANNEL;
1363 ret = ncsi_xmit_cmd(&nca);
1364 if (ret)
1365 goto error;
1366 nd->state = ncsi_dev_state_probe_channel;
1367 break;
1368 case ncsi_dev_state_probe_channel:
1369 ndp->active_package = ncsi_find_package(ndp,
1370 ndp->package_probe_id);
1371 if (!ndp->active_package) {
1372
1373 nd->state = ncsi_dev_state_probe_dp;
1374 schedule_work(&ndp->work);
1375 break;
1376 }
1377 nd->state = ncsi_dev_state_probe_cis;
1378 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) &&
1379 ndp->mlx_multi_host)
1380 nd->state = ncsi_dev_state_probe_mlx_gma;
1381
1382 schedule_work(&ndp->work);
1383 break;
1384#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
1385 case ncsi_dev_state_probe_mlx_gma:
1386 ndp->pending_req_num = 1;
1387
1388 nca.type = NCSI_PKT_CMD_OEM;
1389 nca.package = ndp->active_package->id;
1390 nca.channel = 0;
1391 ret = ncsi_oem_gma_handler_mlx(&nca);
1392 if (ret)
1393 goto error;
1394
1395 nd->state = ncsi_dev_state_probe_mlx_smaf;
1396 break;
1397 case ncsi_dev_state_probe_mlx_smaf:
1398 ndp->pending_req_num = 1;
1399
1400 nca.type = NCSI_PKT_CMD_OEM;
1401 nca.package = ndp->active_package->id;
1402 nca.channel = 0;
1403 ret = ncsi_oem_smaf_mlx(&nca);
1404 if (ret)
1405 goto error;
1406
1407 nd->state = ncsi_dev_state_probe_cis;
1408 break;
1409#endif
1410 case ncsi_dev_state_probe_cis:
1411 ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
1412
1413
1414 nca.type = NCSI_PKT_CMD_CIS;
1415 nca.package = ndp->active_package->id;
1416 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
1417 nca.channel = index;
1418 ret = ncsi_xmit_cmd(&nca);
1419 if (ret)
1420 goto error;
1421 }
1422
1423 nd->state = ncsi_dev_state_probe_gvi;
1424 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY))
1425 nd->state = ncsi_dev_state_probe_keep_phy;
1426 break;
1427#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY)
1428 case ncsi_dev_state_probe_keep_phy:
1429 ndp->pending_req_num = 1;
1430
1431 nca.type = NCSI_PKT_CMD_OEM;
1432 nca.package = ndp->active_package->id;
1433 nca.channel = 0;
1434 ret = ncsi_oem_keep_phy_intel(&nca);
1435 if (ret)
1436 goto error;
1437
1438 nd->state = ncsi_dev_state_probe_gvi;
1439 break;
1440#endif
1441 case ncsi_dev_state_probe_gvi:
1442 case ncsi_dev_state_probe_gc:
1443 case ncsi_dev_state_probe_gls:
1444 np = ndp->active_package;
1445 ndp->pending_req_num = np->channel_num;
1446
1447
1448 if (nd->state == ncsi_dev_state_probe_gvi)
1449 nca.type = NCSI_PKT_CMD_GVI;
1450 else if (nd->state == ncsi_dev_state_probe_gc)
1451 nca.type = NCSI_PKT_CMD_GC;
1452 else
1453 nca.type = NCSI_PKT_CMD_GLS;
1454
1455 nca.package = np->id;
1456 NCSI_FOR_EACH_CHANNEL(np, nc) {
1457 nca.channel = nc->id;
1458 ret = ncsi_xmit_cmd(&nca);
1459 if (ret)
1460 goto error;
1461 }
1462
1463 if (nd->state == ncsi_dev_state_probe_gvi)
1464 nd->state = ncsi_dev_state_probe_gc;
1465 else if (nd->state == ncsi_dev_state_probe_gc)
1466 nd->state = ncsi_dev_state_probe_gls;
1467 else
1468 nd->state = ncsi_dev_state_probe_dp;
1469 break;
1470 case ncsi_dev_state_probe_dp:
1471 ndp->pending_req_num = 1;
1472
1473
1474 nca.type = NCSI_PKT_CMD_DP;
1475 nca.package = ndp->package_probe_id;
1476 nca.channel = NCSI_RESERVED_CHANNEL;
1477 ret = ncsi_xmit_cmd(&nca);
1478 if (ret)
1479 goto error;
1480
1481
1482 ndp->package_probe_id++;
1483 if (ndp->package_probe_id >= 8) {
1484
1485 ndp->flags |= NCSI_DEV_PROBED;
1486 break;
1487 }
1488 nd->state = ncsi_dev_state_probe_package;
1489 ndp->active_package = NULL;
1490 break;
1491 default:
1492 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
1493 nd->state);
1494 }
1495
1496 if (ndp->flags & NCSI_DEV_PROBED) {
1497
1498 ncsi_check_hwa(ndp);
1499 ncsi_choose_active_channel(ndp);
1500 }
1501
1502 return;
1503error:
1504 netdev_err(ndp->ndev.dev,
1505 "NCSI: Failed to transmit cmd 0x%x during probe\n",
1506 nca.type);
1507 ncsi_report_link(ndp, true);
1508}
1509
1510static void ncsi_dev_work(struct work_struct *work)
1511{
1512 struct ncsi_dev_priv *ndp = container_of(work,
1513 struct ncsi_dev_priv, work);
1514 struct ncsi_dev *nd = &ndp->ndev;
1515
1516 switch (nd->state & ncsi_dev_state_major) {
1517 case ncsi_dev_state_probe:
1518 ncsi_probe_channel(ndp);
1519 break;
1520 case ncsi_dev_state_suspend:
1521 ncsi_suspend_channel(ndp);
1522 break;
1523 case ncsi_dev_state_config:
1524 ncsi_configure_channel(ndp);
1525 break;
1526 default:
1527 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
1528 nd->state);
1529 }
1530}
1531
1532int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
1533{
1534 struct ncsi_channel *nc;
1535 int old_state;
1536 unsigned long flags;
1537
1538 spin_lock_irqsave(&ndp->lock, flags);
1539 nc = list_first_or_null_rcu(&ndp->channel_queue,
1540 struct ncsi_channel, link);
1541 if (!nc) {
1542 spin_unlock_irqrestore(&ndp->lock, flags);
1543 goto out;
1544 }
1545
1546 list_del_init(&nc->link);
1547 spin_unlock_irqrestore(&ndp->lock, flags);
1548
1549 spin_lock_irqsave(&nc->lock, flags);
1550 old_state = nc->state;
1551 nc->state = NCSI_CHANNEL_INVISIBLE;
1552 spin_unlock_irqrestore(&nc->lock, flags);
1553
1554 ndp->active_channel = nc;
1555 ndp->active_package = nc->package;
1556
1557 switch (old_state) {
1558 case NCSI_CHANNEL_INACTIVE:
1559 ndp->ndev.state = ncsi_dev_state_config;
1560 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
1561 nc->id);
1562 ncsi_configure_channel(ndp);
1563 break;
1564 case NCSI_CHANNEL_ACTIVE:
1565 ndp->ndev.state = ncsi_dev_state_suspend;
1566 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
1567 nc->id);
1568 ncsi_suspend_channel(ndp);
1569 break;
1570 default:
1571 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
1572 old_state, nc->package->id, nc->id);
1573 ncsi_report_link(ndp, false);
1574 return -EINVAL;
1575 }
1576
1577 return 0;
1578
1579out:
1580 ndp->active_channel = NULL;
1581 ndp->active_package = NULL;
1582 if (ndp->flags & NCSI_DEV_RESHUFFLE) {
1583 ndp->flags &= ~NCSI_DEV_RESHUFFLE;
1584 return ncsi_choose_active_channel(ndp);
1585 }
1586
1587 ncsi_report_link(ndp, false);
1588 return -ENODEV;
1589}
1590
1591static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
1592{
1593 struct ncsi_dev *nd = &ndp->ndev;
1594 struct ncsi_channel *nc;
1595 struct ncsi_package *np;
1596 unsigned long flags;
1597 unsigned int n = 0;
1598
1599 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1600 NCSI_FOR_EACH_CHANNEL(np, nc) {
1601 spin_lock_irqsave(&nc->lock, flags);
1602
1603
1604
1605
1606
1607
1608
1609 if (nc->state != NCSI_CHANNEL_ACTIVE) {
1610 if ((ndp->ndev.state & 0xff00) ==
1611 ncsi_dev_state_config ||
1612 !list_empty(&nc->link)) {
1613 netdev_dbg(nd->dev,
1614 "NCSI: channel %p marked dirty\n",
1615 nc);
1616 nc->reconfigure_needed = true;
1617 }
1618 spin_unlock_irqrestore(&nc->lock, flags);
1619 continue;
1620 }
1621
1622 spin_unlock_irqrestore(&nc->lock, flags);
1623
1624 ncsi_stop_channel_monitor(nc);
1625 spin_lock_irqsave(&nc->lock, flags);
1626 nc->state = NCSI_CHANNEL_INACTIVE;
1627 spin_unlock_irqrestore(&nc->lock, flags);
1628
1629 spin_lock_irqsave(&ndp->lock, flags);
1630 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1631 spin_unlock_irqrestore(&ndp->lock, flags);
1632
1633 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
1634 n++;
1635 }
1636 }
1637
1638 return n;
1639}
1640
1641int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1642{
1643 struct ncsi_dev_priv *ndp;
1644 unsigned int n_vids = 0;
1645 struct vlan_vid *vlan;
1646 struct ncsi_dev *nd;
1647 bool found = false;
1648
1649 if (vid == 0)
1650 return 0;
1651
1652 nd = ncsi_find_dev(dev);
1653 if (!nd) {
1654 netdev_warn(dev, "NCSI: No net_device?\n");
1655 return 0;
1656 }
1657
1658 ndp = TO_NCSI_DEV_PRIV(nd);
1659
1660
1661 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
1662 n_vids++;
1663 if (vlan->vid == vid) {
1664 netdev_dbg(dev, "NCSI: vid %u already registered\n",
1665 vid);
1666 return 0;
1667 }
1668 }
1669 if (n_vids >= NCSI_MAX_VLAN_VIDS) {
1670 netdev_warn(dev,
1671 "tried to add vlan id %u but NCSI max already registered (%u)\n",
1672 vid, NCSI_MAX_VLAN_VIDS);
1673 return -ENOSPC;
1674 }
1675
1676 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1677 if (!vlan)
1678 return -ENOMEM;
1679
1680 vlan->proto = proto;
1681 vlan->vid = vid;
1682 list_add_rcu(&vlan->list, &ndp->vlan_vids);
1683
1684 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
1685
1686 found = ncsi_kick_channels(ndp) != 0;
1687
1688 return found ? ncsi_process_next_channel(ndp) : 0;
1689}
1690EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
1691
1692int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1693{
1694 struct vlan_vid *vlan, *tmp;
1695 struct ncsi_dev_priv *ndp;
1696 struct ncsi_dev *nd;
1697 bool found = false;
1698
1699 if (vid == 0)
1700 return 0;
1701
1702 nd = ncsi_find_dev(dev);
1703 if (!nd) {
1704 netdev_warn(dev, "NCSI: no net_device?\n");
1705 return 0;
1706 }
1707
1708 ndp = TO_NCSI_DEV_PRIV(nd);
1709
1710
1711 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
1712 if (vlan->vid == vid) {
1713 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
1714 list_del_rcu(&vlan->list);
1715 found = true;
1716 kfree(vlan);
1717 }
1718
1719 if (!found) {
1720 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
1721 return -EINVAL;
1722 }
1723
1724 found = ncsi_kick_channels(ndp) != 0;
1725
1726 return found ? ncsi_process_next_channel(ndp) : 0;
1727}
1728EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
1729
1730struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
1731 void (*handler)(struct ncsi_dev *ndev))
1732{
1733 struct ncsi_dev_priv *ndp;
1734 struct ncsi_dev *nd;
1735 struct platform_device *pdev;
1736 struct device_node *np;
1737 unsigned long flags;
1738 int i;
1739
1740
1741 nd = ncsi_find_dev(dev);
1742 if (nd)
1743 return nd;
1744
1745
1746 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
1747 if (!ndp)
1748 return NULL;
1749
1750 nd = &ndp->ndev;
1751 nd->state = ncsi_dev_state_registered;
1752 nd->dev = dev;
1753 nd->handler = handler;
1754 ndp->pending_req_num = 0;
1755 INIT_LIST_HEAD(&ndp->channel_queue);
1756 INIT_LIST_HEAD(&ndp->vlan_vids);
1757 INIT_WORK(&ndp->work, ncsi_dev_work);
1758 ndp->package_whitelist = UINT_MAX;
1759
1760
1761 spin_lock_init(&ndp->lock);
1762 INIT_LIST_HEAD(&ndp->packages);
1763 ndp->request_id = NCSI_REQ_START_IDX;
1764 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
1765 ndp->requests[i].id = i;
1766 ndp->requests[i].ndp = ndp;
1767 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
1768 }
1769
1770 spin_lock_irqsave(&ncsi_dev_lock, flags);
1771 list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
1772 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1773
1774
1775 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
1776 ndp->ptype.func = ncsi_rcv_rsp;
1777 ndp->ptype.dev = dev;
1778 dev_add_pack(&ndp->ptype);
1779
1780 pdev = to_platform_device(dev->dev.parent);
1781 if (pdev) {
1782 np = pdev->dev.of_node;
1783 if (np && of_get_property(np, "mlx,multi-host", NULL))
1784 ndp->mlx_multi_host = true;
1785 }
1786
1787 return nd;
1788}
1789EXPORT_SYMBOL_GPL(ncsi_register_dev);
1790
1791int ncsi_start_dev(struct ncsi_dev *nd)
1792{
1793 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1794
1795 if (nd->state != ncsi_dev_state_registered &&
1796 nd->state != ncsi_dev_state_functional)
1797 return -ENOTTY;
1798
1799 if (!(ndp->flags & NCSI_DEV_PROBED)) {
1800 ndp->package_probe_id = 0;
1801 nd->state = ncsi_dev_state_probe;
1802 schedule_work(&ndp->work);
1803 return 0;
1804 }
1805
1806 return ncsi_reset_dev(nd);
1807}
1808EXPORT_SYMBOL_GPL(ncsi_start_dev);
1809
1810void ncsi_stop_dev(struct ncsi_dev *nd)
1811{
1812 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1813 struct ncsi_package *np;
1814 struct ncsi_channel *nc;
1815 bool chained;
1816 int old_state;
1817 unsigned long flags;
1818
1819
1820
1821
1822
1823 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1824 NCSI_FOR_EACH_CHANNEL(np, nc) {
1825 ncsi_stop_channel_monitor(nc);
1826
1827 spin_lock_irqsave(&nc->lock, flags);
1828 chained = !list_empty(&nc->link);
1829 old_state = nc->state;
1830 spin_unlock_irqrestore(&nc->lock, flags);
1831
1832 WARN_ON_ONCE(chained ||
1833 old_state == NCSI_CHANNEL_INVISIBLE);
1834 }
1835 }
1836
1837 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
1838 ncsi_report_link(ndp, true);
1839}
1840EXPORT_SYMBOL_GPL(ncsi_stop_dev);
1841
1842int ncsi_reset_dev(struct ncsi_dev *nd)
1843{
1844 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1845 struct ncsi_channel *nc, *active, *tmp;
1846 struct ncsi_package *np;
1847 unsigned long flags;
1848
1849 spin_lock_irqsave(&ndp->lock, flags);
1850
1851 if (!(ndp->flags & NCSI_DEV_RESET)) {
1852
1853 switch (nd->state & ncsi_dev_state_major) {
1854 case ncsi_dev_state_registered:
1855 case ncsi_dev_state_probe:
1856
1857 spin_unlock_irqrestore(&ndp->lock, flags);
1858 return 0;
1859 case ncsi_dev_state_suspend:
1860 case ncsi_dev_state_config:
1861
1862
1863
1864
1865 ndp->flags |= NCSI_DEV_RESET;
1866 spin_unlock_irqrestore(&ndp->lock, flags);
1867 return 0;
1868 }
1869 } else {
1870 switch (nd->state) {
1871 case ncsi_dev_state_suspend_done:
1872 case ncsi_dev_state_config_done:
1873 case ncsi_dev_state_functional:
1874
1875 break;
1876 default:
1877
1878 spin_unlock_irqrestore(&ndp->lock, flags);
1879 return 0;
1880 }
1881 }
1882
1883 if (!list_empty(&ndp->channel_queue)) {
1884
1885 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
1886 list_del_init(&nc->link);
1887 }
1888 spin_unlock_irqrestore(&ndp->lock, flags);
1889
1890 active = NULL;
1891 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1892 NCSI_FOR_EACH_CHANNEL(np, nc) {
1893 spin_lock_irqsave(&nc->lock, flags);
1894
1895 if (nc->state == NCSI_CHANNEL_ACTIVE) {
1896 active = nc;
1897 nc->state = NCSI_CHANNEL_INVISIBLE;
1898 spin_unlock_irqrestore(&nc->lock, flags);
1899 ncsi_stop_channel_monitor(nc);
1900 break;
1901 }
1902
1903 spin_unlock_irqrestore(&nc->lock, flags);
1904 }
1905 if (active)
1906 break;
1907 }
1908
1909 if (!active) {
1910
1911 spin_lock_irqsave(&ndp->lock, flags);
1912 ndp->flags &= ~NCSI_DEV_RESET;
1913 spin_unlock_irqrestore(&ndp->lock, flags);
1914 return ncsi_choose_active_channel(ndp);
1915 }
1916
1917 spin_lock_irqsave(&ndp->lock, flags);
1918 ndp->flags |= NCSI_DEV_RESET;
1919 ndp->active_channel = active;
1920 ndp->active_package = active->package;
1921 spin_unlock_irqrestore(&ndp->lock, flags);
1922
1923 nd->state = ncsi_dev_state_suspend;
1924 schedule_work(&ndp->work);
1925 return 0;
1926}
1927
1928void ncsi_unregister_dev(struct ncsi_dev *nd)
1929{
1930 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1931 struct ncsi_package *np, *tmp;
1932 unsigned long flags;
1933
1934 dev_remove_pack(&ndp->ptype);
1935
1936 list_for_each_entry_safe(np, tmp, &ndp->packages, node)
1937 ncsi_remove_package(np);
1938
1939 spin_lock_irqsave(&ncsi_dev_lock, flags);
1940 list_del_rcu(&ndp->node);
1941 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1942
1943 kfree(ndp);
1944}
1945EXPORT_SYMBOL_GPL(ncsi_unregister_dev);
1946