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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright Gavin Shan, IBM Corporation 2016.
4 */
5
6#include <linux/module.h>
7#include <linux/kernel.h>
8#include <linux/init.h>
9#include <linux/netdevice.h>
10#include <linux/skbuff.h>
11#include <linux/of.h>
12#include <linux/platform_device.h>
13
14#include <net/ncsi.h>
15#include <net/net_namespace.h>
16#include <net/sock.h>
17#include <net/addrconf.h>
18#include <net/ipv6.h>
19#include <net/genetlink.h>
20
21#include "internal.h"
22#include "ncsi-pkt.h"
23#include "ncsi-netlink.h"
24
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; /* expected race disabling timer */
110 if (WARN_ON_ONCE(chained))
111 goto bad_state;
112
113 if (state != NCSI_CHANNEL_INACTIVE &&
114 state != NCSI_CHANNEL_ACTIVE) {
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 /* Release filters */
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 /* Remove and free channel */
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 /* Release all child channels */
320 list_for_each_entry_safe(nc, tmp, &np->channels, node)
321 ncsi_remove_channel(nc);
322
323 /* Remove and free package */
324 spin_lock_irqsave(&ndp->lock, flags);
325 list_del_rcu(&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/* For two consecutive NCSI commands, the packet IDs shouldn't
350 * be same. Otherwise, the bogus response might be replied. So
351 * the available IDs are allocated in round-robin fashion.
352 */
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 /* Check if there is one available request until the ceiling */
361 spin_lock_irqsave(&ndp->lock, flags);
362 for (i = ndp->request_id; i < limit; i++) {
363 if (ndp->requests[i].used)
364 continue;
365
366 nr = &ndp->requests[i];
367 nr->used = true;
368 nr->flags = req_flags;
369 ndp->request_id = i + 1;
370 goto found;
371 }
372
373 /* Fail back to check from the starting cursor */
374 for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) {
375 if (ndp->requests[i].used)
376 continue;
377
378 nr = &ndp->requests[i];
379 nr->used = true;
380 nr->flags = req_flags;
381 ndp->request_id = i + 1;
382 goto found;
383 }
384
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 /* Release command and response */
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 /* If the request already had associated response,
441 * let the response handler to release it.
442 */
443 spin_lock_irqsave(&ndp->lock, flags);
444 nr->enabled = false;
445 if (nr->rsp || !nr->cmd) {
446 spin_unlock_irqrestore(&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 /* Find the package */
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 /* Release the request */
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 /* To retrieve the last link states of channels in current
496 * package when current active channel needs fail over to
497 * another one. It means we will possibly select another
498 * channel as next active one. The link states of channels
499 * are most important factor of the selection. So we need
500 * accurate link states. Unfortunately, the link states on
501 * inactive channels can't be updated with LSC AEN in time.
502 */
503 if (ndp->flags & NCSI_DEV_RESHUFFLE)
504 nd->state = ncsi_dev_state_suspend_gls;
505 else
506 nd->state = ncsi_dev_state_suspend_dcnt;
507 ret = ncsi_xmit_cmd(&nca);
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 /* If there is another channel active on this package
555 * do not deselect the package.
556 */
557 if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) {
558 nd->state = ncsi_dev_state_suspend_done;
559 break;
560 }
561 }
562 break;
563 case ncsi_dev_state_suspend_deselect:
564 ndp->pending_req_num = 1;
565
566 nca.type = NCSI_PKT_CMD_DP;
567 nca.package = np->id;
568 nca.channel = NCSI_RESERVED_CHANNEL;
569
570 nd->state = ncsi_dev_state_suspend_done;
571 ret = ncsi_xmit_cmd(&nca);
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/* Check the VLAN filter bitmap for a set filter, and construct a
596 * "Set VLAN Filter - Disable" packet if found.
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_first_bit(bitmap, ncf->n_vids);
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 /* HW filter index starts at 1 */
625 nca->bytes[6] = index + 1;
626 nca->bytes[7] = 0x00;
627 return 0;
628}
629
630/* Find an outstanding VLAN tag and construct a "Set VLAN Filter - Enable"
631 * packet.
632 */
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 /* No VLAN ID is not set */
666 spin_unlock_irqrestore(&nc->lock, flags);
667 return -1;
668 }
669
670 index = find_first_zero_bit(bitmap, ncf->n_vids);
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 /* HW filter index starts at 1 */
686 nca->bytes[6] = index + 1;
687 nca->bytes[7] = 0x01;
688
689 return 0;
690}
691
692static int ncsi_oem_keep_phy_intel(struct ncsi_cmd_arg *nca)
693{
694 unsigned char data[NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN];
695 int ret = 0;
696
697 nca->payload = NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN;
698
699 memset(data, 0, NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN);
700 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID);
701
702 data[4] = NCSI_OEM_INTEL_CMD_KEEP_PHY;
703
704 /* PHY Link up attribute */
705 data[6] = 0x1;
706
707 nca->data = data;
708
709 ret = ncsi_xmit_cmd(nca);
710 if (ret)
711 netdev_err(nca->ndp->ndev.dev,
712 "NCSI: Failed to transmit cmd 0x%x during configure\n",
713 nca->type);
714 return ret;
715}
716
717/* NCSI OEM Command APIs */
718static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
719{
720 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
721 int ret = 0;
722
723 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
724
725 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
726 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_BCM_ID);
727 data[5] = NCSI_OEM_BCM_CMD_GMA;
728
729 nca->data = data;
730
731 ret = ncsi_xmit_cmd(nca);
732 if (ret)
733 netdev_err(nca->ndp->ndev.dev,
734 "NCSI: Failed to transmit cmd 0x%x during configure\n",
735 nca->type);
736 return ret;
737}
738
739static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
740{
741 union {
742 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
743 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
744 } u;
745 int ret = 0;
746
747 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
748
749 memset(&u, 0, sizeof(u));
750 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID);
751 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
752 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
753
754 nca->data = u.data_u8;
755
756 ret = ncsi_xmit_cmd(nca);
757 if (ret)
758 netdev_err(nca->ndp->ndev.dev,
759 "NCSI: Failed to transmit cmd 0x%x during configure\n",
760 nca->type);
761 return ret;
762}
763
764static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca)
765{
766 union {
767 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN];
768 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)];
769 } u;
770 int ret = 0;
771
772 memset(&u, 0, sizeof(u));
773 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID);
774 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF;
775 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM;
776 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET],
777 nca->ndp->ndev.dev->dev_addr, ETH_ALEN);
778 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] =
779 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT);
780
781 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN;
782 nca->data = u.data_u8;
783
784 ret = ncsi_xmit_cmd(nca);
785 if (ret)
786 netdev_err(nca->ndp->ndev.dev,
787 "NCSI: Failed to transmit cmd 0x%x during probe\n",
788 nca->type);
789 return ret;
790}
791
792static int ncsi_oem_gma_handler_intel(struct ncsi_cmd_arg *nca)
793{
794 unsigned char data[NCSI_OEM_INTEL_CMD_GMA_LEN];
795 int ret = 0;
796
797 nca->payload = NCSI_OEM_INTEL_CMD_GMA_LEN;
798
799 memset(data, 0, NCSI_OEM_INTEL_CMD_GMA_LEN);
800 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID);
801 data[4] = NCSI_OEM_INTEL_CMD_GMA;
802
803 nca->data = data;
804
805 ret = ncsi_xmit_cmd(nca);
806 if (ret)
807 netdev_err(nca->ndp->ndev.dev,
808 "NCSI: Failed to transmit cmd 0x%x during configure\n",
809 nca->type);
810
811 return ret;
812}
813
814/* OEM Command handlers initialization */
815static struct ncsi_oem_gma_handler {
816 unsigned int mfr_id;
817 int (*handler)(struct ncsi_cmd_arg *nca);
818} ncsi_oem_gma_handlers[] = {
819 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
820 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx },
821 { NCSI_OEM_MFR_INTEL_ID, ncsi_oem_gma_handler_intel }
822};
823
824static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
825{
826 struct ncsi_oem_gma_handler *nch = NULL;
827 int i;
828
829 /* This function should only be called once, return if flag set */
830 if (nca->ndp->gma_flag == 1)
831 return -1;
832
833 /* Find gma handler for given manufacturer id */
834 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
835 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
836 if (ncsi_oem_gma_handlers[i].handler)
837 nch = &ncsi_oem_gma_handlers[i];
838 break;
839 }
840 }
841
842 if (!nch) {
843 netdev_err(nca->ndp->ndev.dev,
844 "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
845 mf_id);
846 return -1;
847 }
848
849 /* Get Mac address from NCSI device */
850 return nch->handler(nca);
851}
852
853/* Determine if a given channel from the channel_queue should be used for Tx */
854static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
855 struct ncsi_channel *nc)
856{
857 struct ncsi_channel_mode *ncm;
858 struct ncsi_channel *channel;
859 struct ncsi_package *np;
860
861 /* Check if any other channel has Tx enabled; a channel may have already
862 * been configured and removed from the channel queue.
863 */
864 NCSI_FOR_EACH_PACKAGE(ndp, np) {
865 if (!ndp->multi_package && np != nc->package)
866 continue;
867 NCSI_FOR_EACH_CHANNEL(np, channel) {
868 ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
869 if (ncm->enable)
870 return false;
871 }
872 }
873
874 /* This channel is the preferred channel and has link */
875 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
876 np = channel->package;
877 if (np->preferred_channel &&
878 ncsi_channel_has_link(np->preferred_channel)) {
879 return np->preferred_channel == nc;
880 }
881 }
882
883 /* This channel has link */
884 if (ncsi_channel_has_link(nc))
885 return true;
886
887 list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
888 if (ncsi_channel_has_link(channel))
889 return false;
890
891 /* No other channel has link; default to this one */
892 return true;
893}
894
895/* Change the active Tx channel in a multi-channel setup */
896int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
897 struct ncsi_package *package,
898 struct ncsi_channel *disable,
899 struct ncsi_channel *enable)
900{
901 struct ncsi_cmd_arg nca;
902 struct ncsi_channel *nc;
903 struct ncsi_package *np;
904 int ret = 0;
905
906 if (!package->multi_channel && !ndp->multi_package)
907 netdev_warn(ndp->ndev.dev,
908 "NCSI: Trying to update Tx channel in single-channel mode\n");
909 nca.ndp = ndp;
910 nca.req_flags = 0;
911
912 /* Find current channel with Tx enabled */
913 NCSI_FOR_EACH_PACKAGE(ndp, np) {
914 if (disable)
915 break;
916 if (!ndp->multi_package && np != package)
917 continue;
918
919 NCSI_FOR_EACH_CHANNEL(np, nc)
920 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
921 disable = nc;
922 break;
923 }
924 }
925
926 /* Find a suitable channel for Tx */
927 NCSI_FOR_EACH_PACKAGE(ndp, np) {
928 if (enable)
929 break;
930 if (!ndp->multi_package && np != package)
931 continue;
932 if (!(ndp->package_whitelist & (0x1 << np->id)))
933 continue;
934
935 if (np->preferred_channel &&
936 ncsi_channel_has_link(np->preferred_channel)) {
937 enable = np->preferred_channel;
938 break;
939 }
940
941 NCSI_FOR_EACH_CHANNEL(np, nc) {
942 if (!(np->channel_whitelist & 0x1 << nc->id))
943 continue;
944 if (nc->state != NCSI_CHANNEL_ACTIVE)
945 continue;
946 if (ncsi_channel_has_link(nc)) {
947 enable = nc;
948 break;
949 }
950 }
951 }
952
953 if (disable == enable)
954 return -1;
955
956 if (!enable)
957 return -1;
958
959 if (disable) {
960 nca.channel = disable->id;
961 nca.package = disable->package->id;
962 nca.type = NCSI_PKT_CMD_DCNT;
963 ret = ncsi_xmit_cmd(&nca);
964 if (ret)
965 netdev_err(ndp->ndev.dev,
966 "Error %d sending DCNT\n",
967 ret);
968 }
969
970 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
971
972 nca.channel = enable->id;
973 nca.package = enable->package->id;
974 nca.type = NCSI_PKT_CMD_ECNT;
975 ret = ncsi_xmit_cmd(&nca);
976 if (ret)
977 netdev_err(ndp->ndev.dev,
978 "Error %d sending ECNT\n",
979 ret);
980
981 return ret;
982}
983
984static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
985{
986 struct ncsi_package *np = ndp->active_package;
987 struct ncsi_channel *nc = ndp->active_channel;
988 struct ncsi_channel *hot_nc = NULL;
989 struct ncsi_dev *nd = &ndp->ndev;
990 struct net_device *dev = nd->dev;
991 struct ncsi_cmd_arg nca;
992 unsigned char index;
993 unsigned long flags;
994 int ret;
995
996 nca.ndp = ndp;
997 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
998 switch (nd->state) {
999 case ncsi_dev_state_config:
1000 case ncsi_dev_state_config_sp:
1001 ndp->pending_req_num = 1;
1002
1003 /* Select the specific package */
1004 nca.type = NCSI_PKT_CMD_SP;
1005 if (ndp->flags & NCSI_DEV_HWA)
1006 nca.bytes[0] = 0;
1007 else
1008 nca.bytes[0] = 1;
1009 nca.package = np->id;
1010 nca.channel = NCSI_RESERVED_CHANNEL;
1011 ret = ncsi_xmit_cmd(&nca);
1012 if (ret) {
1013 netdev_err(ndp->ndev.dev,
1014 "NCSI: Failed to transmit CMD_SP\n");
1015 goto error;
1016 }
1017
1018 nd->state = ncsi_dev_state_config_cis;
1019 break;
1020 case ncsi_dev_state_config_cis:
1021 ndp->pending_req_num = 1;
1022
1023 /* Clear initial state */
1024 nca.type = NCSI_PKT_CMD_CIS;
1025 nca.package = np->id;
1026 nca.channel = nc->id;
1027 ret = ncsi_xmit_cmd(&nca);
1028 if (ret) {
1029 netdev_err(ndp->ndev.dev,
1030 "NCSI: Failed to transmit CMD_CIS\n");
1031 goto error;
1032 }
1033
1034 nd->state = IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
1035 ? ncsi_dev_state_config_oem_gma
1036 : ncsi_dev_state_config_clear_vids;
1037 break;
1038 case ncsi_dev_state_config_oem_gma:
1039 nd->state = ncsi_dev_state_config_clear_vids;
1040
1041 nca.package = np->id;
1042 nca.channel = nc->id;
1043 ndp->pending_req_num = 1;
1044 if (nc->version.major >= 1 && nc->version.minor >= 2) {
1045 nca.type = NCSI_PKT_CMD_GMCMA;
1046 ret = ncsi_xmit_cmd(&nca);
1047 } else {
1048 nca.type = NCSI_PKT_CMD_OEM;
1049 ret = ncsi_gma_handler(&nca, nc->version.mf_id);
1050 }
1051 if (ret < 0)
1052 schedule_work(&ndp->work);
1053
1054 break;
1055 case ncsi_dev_state_config_clear_vids:
1056 case ncsi_dev_state_config_svf:
1057 case ncsi_dev_state_config_ev:
1058 case ncsi_dev_state_config_sma:
1059 case ncsi_dev_state_config_ebf:
1060 case ncsi_dev_state_config_dgmf:
1061 case ncsi_dev_state_config_ecnt:
1062 case ncsi_dev_state_config_ec:
1063 case ncsi_dev_state_config_ae:
1064 case ncsi_dev_state_config_gls:
1065 ndp->pending_req_num = 1;
1066
1067 nca.package = np->id;
1068 nca.channel = nc->id;
1069
1070 /* Clear any active filters on the channel before setting */
1071 if (nd->state == ncsi_dev_state_config_clear_vids) {
1072 ret = clear_one_vid(ndp, nc, &nca);
1073 if (ret) {
1074 nd->state = ncsi_dev_state_config_svf;
1075 schedule_work(&ndp->work);
1076 break;
1077 }
1078 /* Repeat */
1079 nd->state = ncsi_dev_state_config_clear_vids;
1080 /* Add known VLAN tags to the filter */
1081 } else if (nd->state == ncsi_dev_state_config_svf) {
1082 ret = set_one_vid(ndp, nc, &nca);
1083 if (ret) {
1084 nd->state = ncsi_dev_state_config_ev;
1085 schedule_work(&ndp->work);
1086 break;
1087 }
1088 /* Repeat */
1089 nd->state = ncsi_dev_state_config_svf;
1090 /* Enable/Disable the VLAN filter */
1091 } else if (nd->state == ncsi_dev_state_config_ev) {
1092 if (list_empty(&ndp->vlan_vids)) {
1093 nca.type = NCSI_PKT_CMD_DV;
1094 } else {
1095 nca.type = NCSI_PKT_CMD_EV;
1096 nca.bytes[3] = NCSI_CAP_VLAN_NO;
1097 }
1098 nd->state = ncsi_dev_state_config_sma;
1099 } else if (nd->state == ncsi_dev_state_config_sma) {
1100 /* Use first entry in unicast filter table. Note that
1101 * the MAC filter table starts from entry 1 instead of
1102 * 0.
1103 */
1104 nca.type = NCSI_PKT_CMD_SMA;
1105 for (index = 0; index < 6; index++)
1106 nca.bytes[index] = dev->dev_addr[index];
1107 nca.bytes[6] = 0x1;
1108 nca.bytes[7] = 0x1;
1109 nd->state = ncsi_dev_state_config_ebf;
1110 } else if (nd->state == ncsi_dev_state_config_ebf) {
1111 nca.type = NCSI_PKT_CMD_EBF;
1112 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
1113 /* if multicast global filtering is supported then
1114 * disable it so that all multicast packet will be
1115 * forwarded to management controller
1116 */
1117 if (nc->caps[NCSI_CAP_GENERIC].cap &
1118 NCSI_CAP_GENERIC_MC)
1119 nd->state = ncsi_dev_state_config_dgmf;
1120 else if (ncsi_channel_is_tx(ndp, nc))
1121 nd->state = ncsi_dev_state_config_ecnt;
1122 else
1123 nd->state = ncsi_dev_state_config_ec;
1124 } else if (nd->state == ncsi_dev_state_config_dgmf) {
1125 nca.type = NCSI_PKT_CMD_DGMF;
1126 if (ncsi_channel_is_tx(ndp, nc))
1127 nd->state = ncsi_dev_state_config_ecnt;
1128 else
1129 nd->state = ncsi_dev_state_config_ec;
1130 } else if (nd->state == ncsi_dev_state_config_ecnt) {
1131 if (np->preferred_channel &&
1132 nc != np->preferred_channel)
1133 netdev_info(ndp->ndev.dev,
1134 "NCSI: Tx failed over to channel %u\n",
1135 nc->id);
1136 nca.type = NCSI_PKT_CMD_ECNT;
1137 nd->state = ncsi_dev_state_config_ec;
1138 } else if (nd->state == ncsi_dev_state_config_ec) {
1139 /* Enable AEN if it's supported */
1140 nca.type = NCSI_PKT_CMD_EC;
1141 nd->state = ncsi_dev_state_config_ae;
1142 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
1143 nd->state = ncsi_dev_state_config_gls;
1144 } else if (nd->state == ncsi_dev_state_config_ae) {
1145 nca.type = NCSI_PKT_CMD_AE;
1146 nca.bytes[0] = 0;
1147 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
1148 nd->state = ncsi_dev_state_config_gls;
1149 } else if (nd->state == ncsi_dev_state_config_gls) {
1150 nca.type = NCSI_PKT_CMD_GLS;
1151 nd->state = ncsi_dev_state_config_done;
1152 }
1153
1154 ret = ncsi_xmit_cmd(&nca);
1155 if (ret) {
1156 netdev_err(ndp->ndev.dev,
1157 "NCSI: Failed to transmit CMD %x\n",
1158 nca.type);
1159 goto error;
1160 }
1161 break;
1162 case ncsi_dev_state_config_done:
1163 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
1164 nc->id);
1165 spin_lock_irqsave(&nc->lock, flags);
1166 nc->state = NCSI_CHANNEL_ACTIVE;
1167
1168 if (ndp->flags & NCSI_DEV_RESET) {
1169 /* A reset event happened during config, start it now */
1170 nc->reconfigure_needed = false;
1171 spin_unlock_irqrestore(&nc->lock, flags);
1172 ncsi_reset_dev(nd);
1173 break;
1174 }
1175
1176 if (nc->reconfigure_needed) {
1177 /* This channel's configuration has been updated
1178 * part-way during the config state - start the
1179 * channel configuration over
1180 */
1181 nc->reconfigure_needed = false;
1182 nc->state = NCSI_CHANNEL_INACTIVE;
1183 spin_unlock_irqrestore(&nc->lock, flags);
1184
1185 spin_lock_irqsave(&ndp->lock, flags);
1186 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1187 spin_unlock_irqrestore(&ndp->lock, flags);
1188
1189 netdev_dbg(dev, "Dirty NCSI channel state reset\n");
1190 ncsi_process_next_channel(ndp);
1191 break;
1192 }
1193
1194 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
1195 hot_nc = nc;
1196 } else {
1197 hot_nc = NULL;
1198 netdev_dbg(ndp->ndev.dev,
1199 "NCSI: channel %u link down after config\n",
1200 nc->id);
1201 }
1202 spin_unlock_irqrestore(&nc->lock, flags);
1203
1204 /* Update the hot channel */
1205 spin_lock_irqsave(&ndp->lock, flags);
1206 ndp->hot_channel = hot_nc;
1207 spin_unlock_irqrestore(&ndp->lock, flags);
1208
1209 ncsi_start_channel_monitor(nc);
1210 ncsi_process_next_channel(ndp);
1211 break;
1212 default:
1213 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
1214 nd->state);
1215 }
1216
1217 return;
1218
1219error:
1220 ncsi_report_link(ndp, true);
1221}
1222
1223static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
1224{
1225 struct ncsi_channel *nc, *found, *hot_nc;
1226 struct ncsi_channel_mode *ncm;
1227 unsigned long flags, cflags;
1228 struct ncsi_package *np;
1229 bool with_link;
1230
1231 spin_lock_irqsave(&ndp->lock, flags);
1232 hot_nc = ndp->hot_channel;
1233 spin_unlock_irqrestore(&ndp->lock, flags);
1234
1235 /* By default the search is done once an inactive channel with up
1236 * link is found, unless a preferred channel is set.
1237 * If multi_package or multi_channel are configured all channels in the
1238 * whitelist are added to the channel queue.
1239 */
1240 found = NULL;
1241 with_link = false;
1242 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1243 if (!(ndp->package_whitelist & (0x1 << np->id)))
1244 continue;
1245 NCSI_FOR_EACH_CHANNEL(np, nc) {
1246 if (!(np->channel_whitelist & (0x1 << nc->id)))
1247 continue;
1248
1249 spin_lock_irqsave(&nc->lock, cflags);
1250
1251 if (!list_empty(&nc->link) ||
1252 nc->state != NCSI_CHANNEL_INACTIVE) {
1253 spin_unlock_irqrestore(&nc->lock, cflags);
1254 continue;
1255 }
1256
1257 if (!found)
1258 found = nc;
1259
1260 if (nc == hot_nc)
1261 found = nc;
1262
1263 ncm = &nc->modes[NCSI_MODE_LINK];
1264 if (ncm->data[2] & 0x1) {
1265 found = nc;
1266 with_link = true;
1267 }
1268
1269 /* If multi_channel is enabled configure all valid
1270 * channels whether or not they currently have link
1271 * so they will have AENs enabled.
1272 */
1273 if (with_link || np->multi_channel) {
1274 spin_lock_irqsave(&ndp->lock, flags);
1275 list_add_tail_rcu(&nc->link,
1276 &ndp->channel_queue);
1277 spin_unlock_irqrestore(&ndp->lock, flags);
1278
1279 netdev_dbg(ndp->ndev.dev,
1280 "NCSI: Channel %u added to queue (link %s)\n",
1281 nc->id,
1282 ncm->data[2] & 0x1 ? "up" : "down");
1283 }
1284
1285 spin_unlock_irqrestore(&nc->lock, cflags);
1286
1287 if (with_link && !np->multi_channel)
1288 break;
1289 }
1290 if (with_link && !ndp->multi_package)
1291 break;
1292 }
1293
1294 if (list_empty(&ndp->channel_queue) && found) {
1295 netdev_info(ndp->ndev.dev,
1296 "NCSI: No channel with link found, configuring channel %u\n",
1297 found->id);
1298 spin_lock_irqsave(&ndp->lock, flags);
1299 list_add_tail_rcu(&found->link, &ndp->channel_queue);
1300 spin_unlock_irqrestore(&ndp->lock, flags);
1301 } else if (!found) {
1302 netdev_warn(ndp->ndev.dev,
1303 "NCSI: No channel found to configure!\n");
1304 ncsi_report_link(ndp, true);
1305 return -ENODEV;
1306 }
1307
1308 return ncsi_process_next_channel(ndp);
1309}
1310
1311static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
1312{
1313 struct ncsi_package *np;
1314 struct ncsi_channel *nc;
1315 unsigned int cap;
1316 bool has_channel = false;
1317
1318 /* The hardware arbitration is disabled if any one channel
1319 * doesn't support explicitly.
1320 */
1321 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1322 NCSI_FOR_EACH_CHANNEL(np, nc) {
1323 has_channel = true;
1324
1325 cap = nc->caps[NCSI_CAP_GENERIC].cap;
1326 if (!(cap & NCSI_CAP_GENERIC_HWA) ||
1327 (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
1328 NCSI_CAP_GENERIC_HWA_SUPPORT) {
1329 ndp->flags &= ~NCSI_DEV_HWA;
1330 return false;
1331 }
1332 }
1333 }
1334
1335 if (has_channel) {
1336 ndp->flags |= NCSI_DEV_HWA;
1337 return true;
1338 }
1339
1340 ndp->flags &= ~NCSI_DEV_HWA;
1341 return false;
1342}
1343
1344static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
1345{
1346 struct ncsi_dev *nd = &ndp->ndev;
1347 struct ncsi_package *np;
1348 struct ncsi_channel *nc;
1349 struct ncsi_cmd_arg nca;
1350 unsigned char index;
1351 int ret;
1352
1353 nca.ndp = ndp;
1354 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
1355 switch (nd->state) {
1356 case ncsi_dev_state_probe:
1357 nd->state = ncsi_dev_state_probe_deselect;
1358 fallthrough;
1359 case ncsi_dev_state_probe_deselect:
1360 ndp->pending_req_num = 8;
1361
1362 /* Deselect all possible packages */
1363 nca.type = NCSI_PKT_CMD_DP;
1364 nca.channel = NCSI_RESERVED_CHANNEL;
1365 for (index = 0; index < 8; index++) {
1366 nca.package = index;
1367 ret = ncsi_xmit_cmd(&nca);
1368 if (ret)
1369 goto error;
1370 }
1371
1372 nd->state = ncsi_dev_state_probe_package;
1373 break;
1374 case ncsi_dev_state_probe_package:
1375 ndp->pending_req_num = 1;
1376
1377 nca.type = NCSI_PKT_CMD_SP;
1378 nca.bytes[0] = 1;
1379 nca.package = ndp->package_probe_id;
1380 nca.channel = NCSI_RESERVED_CHANNEL;
1381 ret = ncsi_xmit_cmd(&nca);
1382 if (ret)
1383 goto error;
1384 nd->state = ncsi_dev_state_probe_channel;
1385 break;
1386 case ncsi_dev_state_probe_channel:
1387 ndp->active_package = ncsi_find_package(ndp,
1388 ndp->package_probe_id);
1389 if (!ndp->active_package) {
1390 /* No response */
1391 nd->state = ncsi_dev_state_probe_dp;
1392 schedule_work(&ndp->work);
1393 break;
1394 }
1395 nd->state = ncsi_dev_state_probe_cis;
1396 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) &&
1397 ndp->mlx_multi_host)
1398 nd->state = ncsi_dev_state_probe_mlx_gma;
1399
1400 schedule_work(&ndp->work);
1401 break;
1402 case ncsi_dev_state_probe_mlx_gma:
1403 ndp->pending_req_num = 1;
1404
1405 nca.type = NCSI_PKT_CMD_OEM;
1406 nca.package = ndp->active_package->id;
1407 nca.channel = 0;
1408 ret = ncsi_oem_gma_handler_mlx(&nca);
1409 if (ret)
1410 goto error;
1411
1412 nd->state = ncsi_dev_state_probe_mlx_smaf;
1413 break;
1414 case ncsi_dev_state_probe_mlx_smaf:
1415 ndp->pending_req_num = 1;
1416
1417 nca.type = NCSI_PKT_CMD_OEM;
1418 nca.package = ndp->active_package->id;
1419 nca.channel = 0;
1420 ret = ncsi_oem_smaf_mlx(&nca);
1421 if (ret)
1422 goto error;
1423
1424 nd->state = ncsi_dev_state_probe_cis;
1425 break;
1426 case ncsi_dev_state_probe_cis:
1427 ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
1428
1429 /* Clear initial state */
1430 nca.type = NCSI_PKT_CMD_CIS;
1431 nca.package = ndp->active_package->id;
1432 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
1433 nca.channel = index;
1434 ret = ncsi_xmit_cmd(&nca);
1435 if (ret)
1436 goto error;
1437 }
1438
1439 nd->state = ncsi_dev_state_probe_gvi;
1440 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY))
1441 nd->state = ncsi_dev_state_probe_keep_phy;
1442 break;
1443 case ncsi_dev_state_probe_keep_phy:
1444 ndp->pending_req_num = 1;
1445
1446 nca.type = NCSI_PKT_CMD_OEM;
1447 nca.package = ndp->active_package->id;
1448 nca.channel = 0;
1449 ret = ncsi_oem_keep_phy_intel(&nca);
1450 if (ret)
1451 goto error;
1452
1453 nd->state = ncsi_dev_state_probe_gvi;
1454 break;
1455 case ncsi_dev_state_probe_gvi:
1456 case ncsi_dev_state_probe_gc:
1457 case ncsi_dev_state_probe_gls:
1458 np = ndp->active_package;
1459 ndp->pending_req_num = np->channel_num;
1460
1461 /* Retrieve version, capability or link status */
1462 if (nd->state == ncsi_dev_state_probe_gvi)
1463 nca.type = NCSI_PKT_CMD_GVI;
1464 else if (nd->state == ncsi_dev_state_probe_gc)
1465 nca.type = NCSI_PKT_CMD_GC;
1466 else
1467 nca.type = NCSI_PKT_CMD_GLS;
1468
1469 nca.package = np->id;
1470 NCSI_FOR_EACH_CHANNEL(np, nc) {
1471 nca.channel = nc->id;
1472 ret = ncsi_xmit_cmd(&nca);
1473 if (ret)
1474 goto error;
1475 }
1476
1477 if (nd->state == ncsi_dev_state_probe_gvi)
1478 nd->state = ncsi_dev_state_probe_gc;
1479 else if (nd->state == ncsi_dev_state_probe_gc)
1480 nd->state = ncsi_dev_state_probe_gls;
1481 else
1482 nd->state = ncsi_dev_state_probe_dp;
1483 break;
1484 case ncsi_dev_state_probe_dp:
1485 ndp->pending_req_num = 1;
1486
1487 /* Deselect the current package */
1488 nca.type = NCSI_PKT_CMD_DP;
1489 nca.package = ndp->package_probe_id;
1490 nca.channel = NCSI_RESERVED_CHANNEL;
1491 ret = ncsi_xmit_cmd(&nca);
1492 if (ret)
1493 goto error;
1494
1495 /* Probe next package */
1496 ndp->package_probe_id++;
1497 if (ndp->package_probe_id >= 8) {
1498 /* Probe finished */
1499 ndp->flags |= NCSI_DEV_PROBED;
1500 break;
1501 }
1502 nd->state = ncsi_dev_state_probe_package;
1503 ndp->active_package = NULL;
1504 break;
1505 default:
1506 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
1507 nd->state);
1508 }
1509
1510 if (ndp->flags & NCSI_DEV_PROBED) {
1511 /* Check if all packages have HWA support */
1512 ncsi_check_hwa(ndp);
1513 ncsi_choose_active_channel(ndp);
1514 }
1515
1516 return;
1517error:
1518 netdev_err(ndp->ndev.dev,
1519 "NCSI: Failed to transmit cmd 0x%x during probe\n",
1520 nca.type);
1521 ncsi_report_link(ndp, true);
1522}
1523
1524static void ncsi_dev_work(struct work_struct *work)
1525{
1526 struct ncsi_dev_priv *ndp = container_of(work,
1527 struct ncsi_dev_priv, work);
1528 struct ncsi_dev *nd = &ndp->ndev;
1529
1530 switch (nd->state & ncsi_dev_state_major) {
1531 case ncsi_dev_state_probe:
1532 ncsi_probe_channel(ndp);
1533 break;
1534 case ncsi_dev_state_suspend:
1535 ncsi_suspend_channel(ndp);
1536 break;
1537 case ncsi_dev_state_config:
1538 ncsi_configure_channel(ndp);
1539 break;
1540 default:
1541 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
1542 nd->state);
1543 }
1544}
1545
1546int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
1547{
1548 struct ncsi_channel *nc;
1549 int old_state;
1550 unsigned long flags;
1551
1552 spin_lock_irqsave(&ndp->lock, flags);
1553 nc = list_first_or_null_rcu(&ndp->channel_queue,
1554 struct ncsi_channel, link);
1555 if (!nc) {
1556 spin_unlock_irqrestore(&ndp->lock, flags);
1557 goto out;
1558 }
1559
1560 list_del_init(&nc->link);
1561 spin_unlock_irqrestore(&ndp->lock, flags);
1562
1563 spin_lock_irqsave(&nc->lock, flags);
1564 old_state = nc->state;
1565 nc->state = NCSI_CHANNEL_INVISIBLE;
1566 spin_unlock_irqrestore(&nc->lock, flags);
1567
1568 ndp->active_channel = nc;
1569 ndp->active_package = nc->package;
1570
1571 switch (old_state) {
1572 case NCSI_CHANNEL_INACTIVE:
1573 ndp->ndev.state = ncsi_dev_state_config;
1574 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
1575 nc->id);
1576 ncsi_configure_channel(ndp);
1577 break;
1578 case NCSI_CHANNEL_ACTIVE:
1579 ndp->ndev.state = ncsi_dev_state_suspend;
1580 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
1581 nc->id);
1582 ncsi_suspend_channel(ndp);
1583 break;
1584 default:
1585 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
1586 old_state, nc->package->id, nc->id);
1587 ncsi_report_link(ndp, false);
1588 return -EINVAL;
1589 }
1590
1591 return 0;
1592
1593out:
1594 ndp->active_channel = NULL;
1595 ndp->active_package = NULL;
1596 if (ndp->flags & NCSI_DEV_RESHUFFLE) {
1597 ndp->flags &= ~NCSI_DEV_RESHUFFLE;
1598 return ncsi_choose_active_channel(ndp);
1599 }
1600
1601 ncsi_report_link(ndp, false);
1602 return -ENODEV;
1603}
1604
1605static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
1606{
1607 struct ncsi_dev *nd = &ndp->ndev;
1608 struct ncsi_channel *nc;
1609 struct ncsi_package *np;
1610 unsigned long flags;
1611 unsigned int n = 0;
1612
1613 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1614 NCSI_FOR_EACH_CHANNEL(np, nc) {
1615 spin_lock_irqsave(&nc->lock, flags);
1616
1617 /* Channels may be busy, mark dirty instead of
1618 * kicking if;
1619 * a) not ACTIVE (configured)
1620 * b) in the channel_queue (to be configured)
1621 * c) it's ndev is in the config state
1622 */
1623 if (nc->state != NCSI_CHANNEL_ACTIVE) {
1624 if ((ndp->ndev.state & 0xff00) ==
1625 ncsi_dev_state_config ||
1626 !list_empty(&nc->link)) {
1627 netdev_dbg(nd->dev,
1628 "NCSI: channel %p marked dirty\n",
1629 nc);
1630 nc->reconfigure_needed = true;
1631 }
1632 spin_unlock_irqrestore(&nc->lock, flags);
1633 continue;
1634 }
1635
1636 spin_unlock_irqrestore(&nc->lock, flags);
1637
1638 ncsi_stop_channel_monitor(nc);
1639 spin_lock_irqsave(&nc->lock, flags);
1640 nc->state = NCSI_CHANNEL_INACTIVE;
1641 spin_unlock_irqrestore(&nc->lock, flags);
1642
1643 spin_lock_irqsave(&ndp->lock, flags);
1644 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1645 spin_unlock_irqrestore(&ndp->lock, flags);
1646
1647 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
1648 n++;
1649 }
1650 }
1651
1652 return n;
1653}
1654
1655int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1656{
1657 struct ncsi_dev_priv *ndp;
1658 unsigned int n_vids = 0;
1659 struct vlan_vid *vlan;
1660 struct ncsi_dev *nd;
1661 bool found = false;
1662
1663 if (vid == 0)
1664 return 0;
1665
1666 nd = ncsi_find_dev(dev);
1667 if (!nd) {
1668 netdev_warn(dev, "NCSI: No net_device?\n");
1669 return 0;
1670 }
1671
1672 ndp = TO_NCSI_DEV_PRIV(nd);
1673
1674 /* Add the VLAN id to our internal list */
1675 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
1676 n_vids++;
1677 if (vlan->vid == vid) {
1678 netdev_dbg(dev, "NCSI: vid %u already registered\n",
1679 vid);
1680 return 0;
1681 }
1682 }
1683 if (n_vids >= NCSI_MAX_VLAN_VIDS) {
1684 netdev_warn(dev,
1685 "tried to add vlan id %u but NCSI max already registered (%u)\n",
1686 vid, NCSI_MAX_VLAN_VIDS);
1687 return -ENOSPC;
1688 }
1689
1690 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1691 if (!vlan)
1692 return -ENOMEM;
1693
1694 vlan->proto = proto;
1695 vlan->vid = vid;
1696 list_add_rcu(&vlan->list, &ndp->vlan_vids);
1697
1698 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
1699
1700 found = ncsi_kick_channels(ndp) != 0;
1701
1702 return found ? ncsi_process_next_channel(ndp) : 0;
1703}
1704EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
1705
1706int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1707{
1708 struct vlan_vid *vlan, *tmp;
1709 struct ncsi_dev_priv *ndp;
1710 struct ncsi_dev *nd;
1711 bool found = false;
1712
1713 if (vid == 0)
1714 return 0;
1715
1716 nd = ncsi_find_dev(dev);
1717 if (!nd) {
1718 netdev_warn(dev, "NCSI: no net_device?\n");
1719 return 0;
1720 }
1721
1722 ndp = TO_NCSI_DEV_PRIV(nd);
1723
1724 /* Remove the VLAN id from our internal list */
1725 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
1726 if (vlan->vid == vid) {
1727 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
1728 list_del_rcu(&vlan->list);
1729 found = true;
1730 kfree(vlan);
1731 }
1732
1733 if (!found) {
1734 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
1735 return -EINVAL;
1736 }
1737
1738 found = ncsi_kick_channels(ndp) != 0;
1739
1740 return found ? ncsi_process_next_channel(ndp) : 0;
1741}
1742EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
1743
1744struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
1745 void (*handler)(struct ncsi_dev *ndev))
1746{
1747 struct ncsi_dev_priv *ndp;
1748 struct ncsi_dev *nd;
1749 struct platform_device *pdev;
1750 struct device_node *np;
1751 unsigned long flags;
1752 int i;
1753
1754 /* Check if the device has been registered or not */
1755 nd = ncsi_find_dev(dev);
1756 if (nd)
1757 return nd;
1758
1759 /* Create NCSI device */
1760 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
1761 if (!ndp)
1762 return NULL;
1763
1764 nd = &ndp->ndev;
1765 nd->state = ncsi_dev_state_registered;
1766 nd->dev = dev;
1767 nd->handler = handler;
1768 ndp->pending_req_num = 0;
1769 INIT_LIST_HEAD(&ndp->channel_queue);
1770 INIT_LIST_HEAD(&ndp->vlan_vids);
1771 INIT_WORK(&ndp->work, ncsi_dev_work);
1772 ndp->package_whitelist = UINT_MAX;
1773
1774 /* Initialize private NCSI device */
1775 spin_lock_init(&ndp->lock);
1776 INIT_LIST_HEAD(&ndp->packages);
1777 ndp->request_id = NCSI_REQ_START_IDX;
1778 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
1779 ndp->requests[i].id = i;
1780 ndp->requests[i].ndp = ndp;
1781 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
1782 }
1783
1784 spin_lock_irqsave(&ncsi_dev_lock, flags);
1785 list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
1786 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1787
1788 /* Register NCSI packet Rx handler */
1789 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
1790 ndp->ptype.func = ncsi_rcv_rsp;
1791 ndp->ptype.dev = dev;
1792 dev_add_pack(&ndp->ptype);
1793
1794 pdev = to_platform_device(dev->dev.parent);
1795 if (pdev) {
1796 np = pdev->dev.of_node;
1797 if (np && (of_property_read_bool(np, "mellanox,multi-host") ||
1798 of_property_read_bool(np, "mlx,multi-host")))
1799 ndp->mlx_multi_host = true;
1800 }
1801
1802 return nd;
1803}
1804EXPORT_SYMBOL_GPL(ncsi_register_dev);
1805
1806int ncsi_start_dev(struct ncsi_dev *nd)
1807{
1808 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1809
1810 if (nd->state != ncsi_dev_state_registered &&
1811 nd->state != ncsi_dev_state_functional)
1812 return -ENOTTY;
1813
1814 if (!(ndp->flags & NCSI_DEV_PROBED)) {
1815 ndp->package_probe_id = 0;
1816 nd->state = ncsi_dev_state_probe;
1817 schedule_work(&ndp->work);
1818 return 0;
1819 }
1820
1821 return ncsi_reset_dev(nd);
1822}
1823EXPORT_SYMBOL_GPL(ncsi_start_dev);
1824
1825void ncsi_stop_dev(struct ncsi_dev *nd)
1826{
1827 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1828 struct ncsi_package *np;
1829 struct ncsi_channel *nc;
1830 bool chained;
1831 int old_state;
1832 unsigned long flags;
1833
1834 /* Stop the channel monitor on any active channels. Don't reset the
1835 * channel state so we know which were active when ncsi_start_dev()
1836 * is next called.
1837 */
1838 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1839 NCSI_FOR_EACH_CHANNEL(np, nc) {
1840 ncsi_stop_channel_monitor(nc);
1841
1842 spin_lock_irqsave(&nc->lock, flags);
1843 chained = !list_empty(&nc->link);
1844 old_state = nc->state;
1845 spin_unlock_irqrestore(&nc->lock, flags);
1846
1847 WARN_ON_ONCE(chained ||
1848 old_state == NCSI_CHANNEL_INVISIBLE);
1849 }
1850 }
1851
1852 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
1853 ncsi_report_link(ndp, true);
1854}
1855EXPORT_SYMBOL_GPL(ncsi_stop_dev);
1856
1857int ncsi_reset_dev(struct ncsi_dev *nd)
1858{
1859 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1860 struct ncsi_channel *nc, *active, *tmp;
1861 struct ncsi_package *np;
1862 unsigned long flags;
1863
1864 spin_lock_irqsave(&ndp->lock, flags);
1865
1866 if (!(ndp->flags & NCSI_DEV_RESET)) {
1867 /* Haven't been called yet, check states */
1868 switch (nd->state & ncsi_dev_state_major) {
1869 case ncsi_dev_state_registered:
1870 case ncsi_dev_state_probe:
1871 /* Not even probed yet - do nothing */
1872 spin_unlock_irqrestore(&ndp->lock, flags);
1873 return 0;
1874 case ncsi_dev_state_suspend:
1875 case ncsi_dev_state_config:
1876 /* Wait for the channel to finish its suspend/config
1877 * operation; once it finishes it will check for
1878 * NCSI_DEV_RESET and reset the state.
1879 */
1880 ndp->flags |= NCSI_DEV_RESET;
1881 spin_unlock_irqrestore(&ndp->lock, flags);
1882 return 0;
1883 }
1884 } else {
1885 switch (nd->state) {
1886 case ncsi_dev_state_suspend_done:
1887 case ncsi_dev_state_config_done:
1888 case ncsi_dev_state_functional:
1889 /* Ok */
1890 break;
1891 default:
1892 /* Current reset operation happening */
1893 spin_unlock_irqrestore(&ndp->lock, flags);
1894 return 0;
1895 }
1896 }
1897
1898 if (!list_empty(&ndp->channel_queue)) {
1899 /* Clear any channel queue we may have interrupted */
1900 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
1901 list_del_init(&nc->link);
1902 }
1903 spin_unlock_irqrestore(&ndp->lock, flags);
1904
1905 active = NULL;
1906 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1907 NCSI_FOR_EACH_CHANNEL(np, nc) {
1908 spin_lock_irqsave(&nc->lock, flags);
1909
1910 if (nc->state == NCSI_CHANNEL_ACTIVE) {
1911 active = nc;
1912 nc->state = NCSI_CHANNEL_INVISIBLE;
1913 spin_unlock_irqrestore(&nc->lock, flags);
1914 ncsi_stop_channel_monitor(nc);
1915 break;
1916 }
1917
1918 spin_unlock_irqrestore(&nc->lock, flags);
1919 }
1920 if (active)
1921 break;
1922 }
1923
1924 if (!active) {
1925 /* Done */
1926 spin_lock_irqsave(&ndp->lock, flags);
1927 ndp->flags &= ~NCSI_DEV_RESET;
1928 spin_unlock_irqrestore(&ndp->lock, flags);
1929 return ncsi_choose_active_channel(ndp);
1930 }
1931
1932 spin_lock_irqsave(&ndp->lock, flags);
1933 ndp->flags |= NCSI_DEV_RESET;
1934 ndp->active_channel = active;
1935 ndp->active_package = active->package;
1936 spin_unlock_irqrestore(&ndp->lock, flags);
1937
1938 nd->state = ncsi_dev_state_suspend;
1939 schedule_work(&ndp->work);
1940 return 0;
1941}
1942
1943void ncsi_unregister_dev(struct ncsi_dev *nd)
1944{
1945 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1946 struct ncsi_package *np, *tmp;
1947 unsigned long flags;
1948
1949 dev_remove_pack(&ndp->ptype);
1950
1951 list_for_each_entry_safe(np, tmp, &ndp->packages, node)
1952 ncsi_remove_package(np);
1953
1954 spin_lock_irqsave(&ncsi_dev_lock, flags);
1955 list_del_rcu(&ndp->node);
1956 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1957
1958 kfree(ndp);
1959}
1960EXPORT_SYMBOL_GPL(ncsi_unregister_dev);