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dm writecache: fix incorrect flush sequence when doing SSD mode commit
[linux/fpc-iii.git] / net / ncsi / ncsi-manage.c
blob70fe02697544f496364b18268b4ccc0e7a15eaca
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
12 #include <net/ncsi.h>
13 #include <net/net_namespace.h>
14 #include <net/sock.h>
15 #include <net/addrconf.h>
16 #include <net/ipv6.h>
17 #include <net/genetlink.h>
18
19 #include "internal.h"
20 #include "ncsi-pkt.h"
21 #include "ncsi-netlink.h"
22
23 LIST_HEAD(ncsi_dev_list);
24 DEFINE_SPINLOCK(ncsi_dev_lock);
25
26 bool ncsi_channel_has_link(struct ncsi_channel *channel)
27 {
28 return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1);
29 }
30
31 bool ncsi_channel_is_last(struct ncsi_dev_priv *ndp,
32 struct ncsi_channel *channel)
33 {
34 struct ncsi_package *np;
35 struct ncsi_channel *nc;
36
37 NCSI_FOR_EACH_PACKAGE(ndp, np)
38 NCSI_FOR_EACH_CHANNEL(np, nc) {
39 if (nc == channel)
40 continue;
41 if (nc->state == NCSI_CHANNEL_ACTIVE &&
42 ncsi_channel_has_link(nc))
43 return false;
44 }
45
46 return true;
47 }
48
49 static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down)
50 {
51 struct ncsi_dev *nd = &ndp->ndev;
52 struct ncsi_package *np;
53 struct ncsi_channel *nc;
54 unsigned long flags;
55
56 nd->state = ncsi_dev_state_functional;
57 if (force_down) {
58 nd->link_up = 0;
59 goto report;
60 }
61
62 nd->link_up = 0;
63 NCSI_FOR_EACH_PACKAGE(ndp, np) {
64 NCSI_FOR_EACH_CHANNEL(np, nc) {
65 spin_lock_irqsave(&nc->lock, flags);
66
67 if (!list_empty(&nc->link) ||
68 nc->state != NCSI_CHANNEL_ACTIVE) {
69 spin_unlock_irqrestore(&nc->lock, flags);
70 continue;
71 }
72
73 if (ncsi_channel_has_link(nc)) {
74 spin_unlock_irqrestore(&nc->lock, flags);
75 nd->link_up = 1;
76 goto report;
77 }
78
79 spin_unlock_irqrestore(&nc->lock, flags);
80 }
81 }
82
83 report:
84 nd->handler(nd);
85 }
86
87 static void ncsi_channel_monitor(struct timer_list *t)
88 {
89 struct ncsi_channel *nc = from_timer(nc, t, monitor.timer);
90 struct ncsi_package *np = nc->package;
91 struct ncsi_dev_priv *ndp = np->ndp;
92 struct ncsi_channel_mode *ncm;
93 struct ncsi_cmd_arg nca;
94 bool enabled, chained;
95 unsigned int monitor_state;
96 unsigned long flags;
97 int state, ret;
98
99 spin_lock_irqsave(&nc->lock, flags);
100 state = nc->state;
101 chained = !list_empty(&nc->link);
102 enabled = nc->monitor.enabled;
103 monitor_state = nc->monitor.state;
104 spin_unlock_irqrestore(&nc->lock, flags);
105
106 if (!enabled || chained) {
107 ncsi_stop_channel_monitor(nc);
108 return;
109 }
110 if (state != NCSI_CHANNEL_INACTIVE &&
111 state != NCSI_CHANNEL_ACTIVE) {
112 ncsi_stop_channel_monitor(nc);
113 return;
114 }
115
116 switch (monitor_state) {
117 case NCSI_CHANNEL_MONITOR_START:
118 case NCSI_CHANNEL_MONITOR_RETRY:
119 nca.ndp = ndp;
120 nca.package = np->id;
121 nca.channel = nc->id;
122 nca.type = NCSI_PKT_CMD_GLS;
123 nca.req_flags = 0;
124 ret = ncsi_xmit_cmd(&nca);
125 if (ret)
126 netdev_err(ndp->ndev.dev, "Error %d sending GLS\n",
127 ret);
128 break;
129 case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX:
130 break;
131 default:
132 netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n",
133 nc->id);
134 ncsi_report_link(ndp, true);
135 ndp->flags |= NCSI_DEV_RESHUFFLE;
136
137 ncsi_stop_channel_monitor(nc);
138
139 ncm = &nc->modes[NCSI_MODE_LINK];
140 spin_lock_irqsave(&nc->lock, flags);
141 nc->state = NCSI_CHANNEL_INVISIBLE;
142 ncm->data[2] &= ~0x1;
143 spin_unlock_irqrestore(&nc->lock, flags);
144
145 spin_lock_irqsave(&ndp->lock, flags);
146 nc->state = NCSI_CHANNEL_ACTIVE;
147 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
148 spin_unlock_irqrestore(&ndp->lock, flags);
149 ncsi_process_next_channel(ndp);
150 return;
151 }
152
153 spin_lock_irqsave(&nc->lock, flags);
154 nc->monitor.state++;
155 spin_unlock_irqrestore(&nc->lock, flags);
156 mod_timer(&nc->monitor.timer, jiffies + HZ);
157 }
158
159 void ncsi_start_channel_monitor(struct ncsi_channel *nc)
160 {
161 unsigned long flags;
162
163 spin_lock_irqsave(&nc->lock, flags);
164 WARN_ON_ONCE(nc->monitor.enabled);
165 nc->monitor.enabled = true;
166 nc->monitor.state = NCSI_CHANNEL_MONITOR_START;
167 spin_unlock_irqrestore(&nc->lock, flags);
168
169 mod_timer(&nc->monitor.timer, jiffies + HZ);
170 }
171
172 void ncsi_stop_channel_monitor(struct ncsi_channel *nc)
173 {
174 unsigned long flags;
175
176 spin_lock_irqsave(&nc->lock, flags);
177 if (!nc->monitor.enabled) {
178 spin_unlock_irqrestore(&nc->lock, flags);
179 return;
180 }
181 nc->monitor.enabled = false;
182 spin_unlock_irqrestore(&nc->lock, flags);
183
184 del_timer_sync(&nc->monitor.timer);
185 }
186
187 struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
188 unsigned char id)
189 {
190 struct ncsi_channel *nc;
191
192 NCSI_FOR_EACH_CHANNEL(np, nc) {
193 if (nc->id == id)
194 return nc;
195 }
196
197 return NULL;
198 }
199
200 struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id)
201 {
202 struct ncsi_channel *nc, *tmp;
203 int index;
204 unsigned long flags;
205
206 nc = kzalloc(sizeof(*nc), GFP_ATOMIC);
207 if (!nc)
208 return NULL;
209
210 nc->id = id;
211 nc->package = np;
212 nc->state = NCSI_CHANNEL_INACTIVE;
213 nc->monitor.enabled = false;
214 timer_setup(&nc->monitor.timer, ncsi_channel_monitor, 0);
215 spin_lock_init(&nc->lock);
216 INIT_LIST_HEAD(&nc->link);
217 for (index = 0; index < NCSI_CAP_MAX; index++)
218 nc->caps[index].index = index;
219 for (index = 0; index < NCSI_MODE_MAX; index++)
220 nc->modes[index].index = index;
221
222 spin_lock_irqsave(&np->lock, flags);
223 tmp = ncsi_find_channel(np, id);
224 if (tmp) {
225 spin_unlock_irqrestore(&np->lock, flags);
226 kfree(nc);
227 return tmp;
228 }
229
230 list_add_tail_rcu(&nc->node, &np->channels);
231 np->channel_num++;
232 spin_unlock_irqrestore(&np->lock, flags);
233
234 return nc;
235 }
236
237 static void ncsi_remove_channel(struct ncsi_channel *nc)
238 {
239 struct ncsi_package *np = nc->package;
240 unsigned long flags;
241
242 spin_lock_irqsave(&nc->lock, flags);
243
244 /* Release filters */
245 kfree(nc->mac_filter.addrs);
246 kfree(nc->vlan_filter.vids);
247
248 nc->state = NCSI_CHANNEL_INACTIVE;
249 spin_unlock_irqrestore(&nc->lock, flags);
250 ncsi_stop_channel_monitor(nc);
251
252 /* Remove and free channel */
253 spin_lock_irqsave(&np->lock, flags);
254 list_del_rcu(&nc->node);
255 np->channel_num--;
256 spin_unlock_irqrestore(&np->lock, flags);
257
258 kfree(nc);
259 }
260
261 struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp,
262 unsigned char id)
263 {
264 struct ncsi_package *np;
265
266 NCSI_FOR_EACH_PACKAGE(ndp, np) {
267 if (np->id == id)
268 return np;
269 }
270
271 return NULL;
272 }
273
274 struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp,
275 unsigned char id)
276 {
277 struct ncsi_package *np, *tmp;
278 unsigned long flags;
279
280 np = kzalloc(sizeof(*np), GFP_ATOMIC);
281 if (!np)
282 return NULL;
283
284 np->id = id;
285 np->ndp = ndp;
286 spin_lock_init(&np->lock);
287 INIT_LIST_HEAD(&np->channels);
288 np->channel_whitelist = UINT_MAX;
289
290 spin_lock_irqsave(&ndp->lock, flags);
291 tmp = ncsi_find_package(ndp, id);
292 if (tmp) {
293 spin_unlock_irqrestore(&ndp->lock, flags);
294 kfree(np);
295 return tmp;
296 }
297
298 list_add_tail_rcu(&np->node, &ndp->packages);
299 ndp->package_num++;
300 spin_unlock_irqrestore(&ndp->lock, flags);
301
302 return np;
303 }
304
305 void ncsi_remove_package(struct ncsi_package *np)
306 {
307 struct ncsi_dev_priv *ndp = np->ndp;
308 struct ncsi_channel *nc, *tmp;
309 unsigned long flags;
310
311 /* Release all child channels */
312 list_for_each_entry_safe(nc, tmp, &np->channels, node)
313 ncsi_remove_channel(nc);
314
315 /* Remove and free package */
316 spin_lock_irqsave(&ndp->lock, flags);
317 list_del_rcu(&np->node);
318 ndp->package_num--;
319 spin_unlock_irqrestore(&ndp->lock, flags);
320
321 kfree(np);
322 }
323
324 void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp,
325 unsigned char id,
326 struct ncsi_package **np,
327 struct ncsi_channel **nc)
328 {
329 struct ncsi_package *p;
330 struct ncsi_channel *c;
331
332 p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id));
333 c = p ? ncsi_find_channel(p, NCSI_CHANNEL_INDEX(id)) : NULL;
334
335 if (np)
336 *np = p;
337 if (nc)
338 *nc = c;
339 }
340
341 /* For two consecutive NCSI commands, the packet IDs shouldn't
342 * be same. Otherwise, the bogus response might be replied. So
343 * the available IDs are allocated in round-robin fashion.
344 */
345 struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp,
346 unsigned int req_flags)
347 {
348 struct ncsi_request *nr = NULL;
349 int i, limit = ARRAY_SIZE(ndp->requests);
350 unsigned long flags;
351
352 /* Check if there is one available request until the ceiling */
353 spin_lock_irqsave(&ndp->lock, flags);
354 for (i = ndp->request_id; i < limit; i++) {
355 if (ndp->requests[i].used)
356 continue;
357
358 nr = &ndp->requests[i];
359 nr->used = true;
360 nr->flags = req_flags;
361 ndp->request_id = i + 1;
362 goto found;
363 }
364
365 /* Fail back to check from the starting cursor */
366 for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) {
367 if (ndp->requests[i].used)
368 continue;
369
370 nr = &ndp->requests[i];
371 nr->used = true;
372 nr->flags = req_flags;
373 ndp->request_id = i + 1;
374 goto found;
375 }
376
377 found:
378 spin_unlock_irqrestore(&ndp->lock, flags);
379 return nr;
380 }
381
382 void ncsi_free_request(struct ncsi_request *nr)
383 {
384 struct ncsi_dev_priv *ndp = nr->ndp;
385 struct sk_buff *cmd, *rsp;
386 unsigned long flags;
387 bool driven;
388
389 if (nr->enabled) {
390 nr->enabled = false;
391 del_timer_sync(&nr->timer);
392 }
393
394 spin_lock_irqsave(&ndp->lock, flags);
395 cmd = nr->cmd;
396 rsp = nr->rsp;
397 nr->cmd = NULL;
398 nr->rsp = NULL;
399 nr->used = false;
400 driven = !!(nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN);
401 spin_unlock_irqrestore(&ndp->lock, flags);
402
403 if (driven && cmd && --ndp->pending_req_num == 0)
404 schedule_work(&ndp->work);
405
406 /* Release command and response */
407 consume_skb(cmd);
408 consume_skb(rsp);
409 }
410
411 struct ncsi_dev *ncsi_find_dev(struct net_device *dev)
412 {
413 struct ncsi_dev_priv *ndp;
414
415 NCSI_FOR_EACH_DEV(ndp) {
416 if (ndp->ndev.dev == dev)
417 return &ndp->ndev;
418 }
419
420 return NULL;
421 }
422
423 static void ncsi_request_timeout(struct timer_list *t)
424 {
425 struct ncsi_request *nr = from_timer(nr, t, timer);
426 struct ncsi_dev_priv *ndp = nr->ndp;
427 struct ncsi_cmd_pkt *cmd;
428 struct ncsi_package *np;
429 struct ncsi_channel *nc;
430 unsigned long flags;
431
432 /* If the request already had associated response,
433 * let the response handler to release it.
434 */
435 spin_lock_irqsave(&ndp->lock, flags);
436 nr->enabled = false;
437 if (nr->rsp || !nr->cmd) {
438 spin_unlock_irqrestore(&ndp->lock, flags);
439 return;
440 }
441 spin_unlock_irqrestore(&ndp->lock, flags);
442
443 if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
444 if (nr->cmd) {
445 /* Find the package */
446 cmd = (struct ncsi_cmd_pkt *)
447 skb_network_header(nr->cmd);
448 ncsi_find_package_and_channel(ndp,
449 cmd->cmd.common.channel,
450 &np, &nc);
451 ncsi_send_netlink_timeout(nr, np, nc);
452 }
453 }
454
455 /* Release the request */
456 ncsi_free_request(nr);
457 }
458
459 static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
460 {
461 struct ncsi_dev *nd = &ndp->ndev;
462 struct ncsi_package *np;
463 struct ncsi_channel *nc, *tmp;
464 struct ncsi_cmd_arg nca;
465 unsigned long flags;
466 int ret;
467
468 np = ndp->active_package;
469 nc = ndp->active_channel;
470 nca.ndp = ndp;
471 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
472 switch (nd->state) {
473 case ncsi_dev_state_suspend:
474 nd->state = ncsi_dev_state_suspend_select;
475 /* Fall through */
476 case ncsi_dev_state_suspend_select:
477 ndp->pending_req_num = 1;
478
479 nca.type = NCSI_PKT_CMD_SP;
480 nca.package = np->id;
481 nca.channel = NCSI_RESERVED_CHANNEL;
482 if (ndp->flags & NCSI_DEV_HWA)
483 nca.bytes[0] = 0;
484 else
485 nca.bytes[0] = 1;
486
487 /* To retrieve the last link states of channels in current
488 * package when current active channel needs fail over to
489 * another one. It means we will possibly select another
490 * channel as next active one. The link states of channels
491 * are most important factor of the selection. So we need
492 * accurate link states. Unfortunately, the link states on
493 * inactive channels can't be updated with LSC AEN in time.
494 */
495 if (ndp->flags & NCSI_DEV_RESHUFFLE)
496 nd->state = ncsi_dev_state_suspend_gls;
497 else
498 nd->state = ncsi_dev_state_suspend_dcnt;
499 ret = ncsi_xmit_cmd(&nca);
500 if (ret)
501 goto error;
502
503 break;
504 case ncsi_dev_state_suspend_gls:
505 ndp->pending_req_num = np->channel_num;
506
507 nca.type = NCSI_PKT_CMD_GLS;
508 nca.package = np->id;
509
510 nd->state = ncsi_dev_state_suspend_dcnt;
511 NCSI_FOR_EACH_CHANNEL(np, nc) {
512 nca.channel = nc->id;
513 ret = ncsi_xmit_cmd(&nca);
514 if (ret)
515 goto error;
516 }
517
518 break;
519 case ncsi_dev_state_suspend_dcnt:
520 ndp->pending_req_num = 1;
521
522 nca.type = NCSI_PKT_CMD_DCNT;
523 nca.package = np->id;
524 nca.channel = nc->id;
525
526 nd->state = ncsi_dev_state_suspend_dc;
527 ret = ncsi_xmit_cmd(&nca);
528 if (ret)
529 goto error;
530
531 break;
532 case ncsi_dev_state_suspend_dc:
533 ndp->pending_req_num = 1;
534
535 nca.type = NCSI_PKT_CMD_DC;
536 nca.package = np->id;
537 nca.channel = nc->id;
538 nca.bytes[0] = 1;
539
540 nd->state = ncsi_dev_state_suspend_deselect;
541 ret = ncsi_xmit_cmd(&nca);
542 if (ret)
543 goto error;
544
545 NCSI_FOR_EACH_CHANNEL(np, tmp) {
546 /* If there is another channel active on this package
547 * do not deselect the package.
548 */
549 if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) {
550 nd->state = ncsi_dev_state_suspend_done;
551 break;
552 }
553 }
554 break;
555 case ncsi_dev_state_suspend_deselect:
556 ndp->pending_req_num = 1;
557
558 nca.type = NCSI_PKT_CMD_DP;
559 nca.package = np->id;
560 nca.channel = NCSI_RESERVED_CHANNEL;
561
562 nd->state = ncsi_dev_state_suspend_done;
563 ret = ncsi_xmit_cmd(&nca);
564 if (ret)
565 goto error;
566
567 break;
568 case ncsi_dev_state_suspend_done:
569 spin_lock_irqsave(&nc->lock, flags);
570 nc->state = NCSI_CHANNEL_INACTIVE;
571 spin_unlock_irqrestore(&nc->lock, flags);
572 if (ndp->flags & NCSI_DEV_RESET)
573 ncsi_reset_dev(nd);
574 else
575 ncsi_process_next_channel(ndp);
576 break;
577 default:
578 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n",
579 nd->state);
580 }
581
582 return;
583 error:
584 nd->state = ncsi_dev_state_functional;
585 }
586
587 /* Check the VLAN filter bitmap for a set filter, and construct a
588 * "Set VLAN Filter - Disable" packet if found.
589 */
590 static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
591 struct ncsi_cmd_arg *nca)
592 {
593 struct ncsi_channel_vlan_filter *ncf;
594 unsigned long flags;
595 void *bitmap;
596 int index;
597 u16 vid;
598
599 ncf = &nc->vlan_filter;
600 bitmap = &ncf->bitmap;
601
602 spin_lock_irqsave(&nc->lock, flags);
603 index = find_next_bit(bitmap, ncf->n_vids, 0);
604 if (index >= ncf->n_vids) {
605 spin_unlock_irqrestore(&nc->lock, flags);
606 return -1;
607 }
608 vid = ncf->vids[index];
609
610 clear_bit(index, bitmap);
611 ncf->vids[index] = 0;
612 spin_unlock_irqrestore(&nc->lock, flags);
613
614 nca->type = NCSI_PKT_CMD_SVF;
615 nca->words[1] = vid;
616 /* HW filter index starts at 1 */
617 nca->bytes[6] = index + 1;
618 nca->bytes[7] = 0x00;
619 return 0;
620 }
621
622 /* Find an outstanding VLAN tag and constuct a "Set VLAN Filter - Enable"
623 * packet.
624 */
625 static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
626 struct ncsi_cmd_arg *nca)
627 {
628 struct ncsi_channel_vlan_filter *ncf;
629 struct vlan_vid *vlan = NULL;
630 unsigned long flags;
631 int i, index;
632 void *bitmap;
633 u16 vid;
634
635 if (list_empty(&ndp->vlan_vids))
636 return -1;
637
638 ncf = &nc->vlan_filter;
639 bitmap = &ncf->bitmap;
640
641 spin_lock_irqsave(&nc->lock, flags);
642
643 rcu_read_lock();
644 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
645 vid = vlan->vid;
646 for (i = 0; i < ncf->n_vids; i++)
647 if (ncf->vids[i] == vid) {
648 vid = 0;
649 break;
650 }
651 if (vid)
652 break;
653 }
654 rcu_read_unlock();
655
656 if (!vid) {
657 /* No VLAN ID is not set */
658 spin_unlock_irqrestore(&nc->lock, flags);
659 return -1;
660 }
661
662 index = find_next_zero_bit(bitmap, ncf->n_vids, 0);
663 if (index < 0 || index >= ncf->n_vids) {
664 netdev_err(ndp->ndev.dev,
665 "Channel %u already has all VLAN filters set\n",
666 nc->id);
667 spin_unlock_irqrestore(&nc->lock, flags);
668 return -1;
669 }
670
671 ncf->vids[index] = vid;
672 set_bit(index, bitmap);
673 spin_unlock_irqrestore(&nc->lock, flags);
674
675 nca->type = NCSI_PKT_CMD_SVF;
676 nca->words[1] = vid;
677 /* HW filter index starts at 1 */
678 nca->bytes[6] = index + 1;
679 nca->bytes[7] = 0x01;
680
681 return 0;
682 }
683
684 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
685
686 /* NCSI OEM Command APIs */
687 static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
688 {
689 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
690 int ret = 0;
691
692 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
693
694 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
695 *(unsigned int *)data = ntohl(NCSI_OEM_MFR_BCM_ID);
696 data[5] = NCSI_OEM_BCM_CMD_GMA;
697
698 nca->data = data;
699
700 ret = ncsi_xmit_cmd(nca);
701 if (ret)
702 netdev_err(nca->ndp->ndev.dev,
703 "NCSI: Failed to transmit cmd 0x%x during configure\n",
704 nca->type);
705 return ret;
706 }
707
708 static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
709 {
710 union {
711 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
712 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
713 } u;
714 int ret = 0;
715
716 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
717
718 memset(&u, 0, sizeof(u));
719 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID);
720 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
721 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
722
723 nca->data = u.data_u8;
724
725 ret = ncsi_xmit_cmd(nca);
726 if (ret)
727 netdev_err(nca->ndp->ndev.dev,
728 "NCSI: Failed to transmit cmd 0x%x during configure\n",
729 nca->type);
730 return ret;
731 }
732
733 /* OEM Command handlers initialization */
734 static struct ncsi_oem_gma_handler {
735 unsigned int mfr_id;
736 int (*handler)(struct ncsi_cmd_arg *nca);
737 } ncsi_oem_gma_handlers[] = {
738 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
739 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }
740 };
741
742 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
743 {
744 struct ncsi_oem_gma_handler *nch = NULL;
745 int i;
746
747 /* This function should only be called once, return if flag set */
748 if (nca->ndp->gma_flag == 1)
749 return -1;
750
751 /* Find gma handler for given manufacturer id */
752 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
753 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
754 if (ncsi_oem_gma_handlers[i].handler)
755 nch = &ncsi_oem_gma_handlers[i];
756 break;
757 }
758 }
759
760 if (!nch) {
761 netdev_err(nca->ndp->ndev.dev,
762 "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
763 mf_id);
764 return -1;
765 }
766
767 /* Set the flag for GMA command which should only be called once */
768 nca->ndp->gma_flag = 1;
769
770 /* Get Mac address from NCSI device */
771 return nch->handler(nca);
772 }
773
774 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
775
776 /* Determine if a given channel from the channel_queue should be used for Tx */
777 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
778 struct ncsi_channel *nc)
779 {
780 struct ncsi_channel_mode *ncm;
781 struct ncsi_channel *channel;
782 struct ncsi_package *np;
783
784 /* Check if any other channel has Tx enabled; a channel may have already
785 * been configured and removed from the channel queue.
786 */
787 NCSI_FOR_EACH_PACKAGE(ndp, np) {
788 if (!ndp->multi_package && np != nc->package)
789 continue;
790 NCSI_FOR_EACH_CHANNEL(np, channel) {
791 ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
792 if (ncm->enable)
793 return false;
794 }
795 }
796
797 /* This channel is the preferred channel and has link */
798 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
799 np = channel->package;
800 if (np->preferred_channel &&
801 ncsi_channel_has_link(np->preferred_channel)) {
802 return np->preferred_channel == nc;
803 }
804 }
805
806 /* This channel has link */
807 if (ncsi_channel_has_link(nc))
808 return true;
809
810 list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
811 if (ncsi_channel_has_link(channel))
812 return false;
813
814 /* No other channel has link; default to this one */
815 return true;
816 }
817
818 /* Change the active Tx channel in a multi-channel setup */
819 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
820 struct ncsi_package *package,
821 struct ncsi_channel *disable,
822 struct ncsi_channel *enable)
823 {
824 struct ncsi_cmd_arg nca;
825 struct ncsi_channel *nc;
826 struct ncsi_package *np;
827 int ret = 0;
828
829 if (!package->multi_channel && !ndp->multi_package)
830 netdev_warn(ndp->ndev.dev,
831 "NCSI: Trying to update Tx channel in single-channel mode\n");
832 nca.ndp = ndp;
833 nca.req_flags = 0;
834
835 /* Find current channel with Tx enabled */
836 NCSI_FOR_EACH_PACKAGE(ndp, np) {
837 if (disable)
838 break;
839 if (!ndp->multi_package && np != package)
840 continue;
841
842 NCSI_FOR_EACH_CHANNEL(np, nc)
843 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
844 disable = nc;
845 break;
846 }
847 }
848
849 /* Find a suitable channel for Tx */
850 NCSI_FOR_EACH_PACKAGE(ndp, np) {
851 if (enable)
852 break;
853 if (!ndp->multi_package && np != package)
854 continue;
855 if (!(ndp->package_whitelist & (0x1 << np->id)))
856 continue;
857
858 if (np->preferred_channel &&
859 ncsi_channel_has_link(np->preferred_channel)) {
860 enable = np->preferred_channel;
861 break;
862 }
863
864 NCSI_FOR_EACH_CHANNEL(np, nc) {
865 if (!(np->channel_whitelist & 0x1 << nc->id))
866 continue;
867 if (nc->state != NCSI_CHANNEL_ACTIVE)
868 continue;
869 if (ncsi_channel_has_link(nc)) {
870 enable = nc;
871 break;
872 }
873 }
874 }
875
876 if (disable == enable)
877 return -1;
878
879 if (!enable)
880 return -1;
881
882 if (disable) {
883 nca.channel = disable->id;
884 nca.package = disable->package->id;
885 nca.type = NCSI_PKT_CMD_DCNT;
886 ret = ncsi_xmit_cmd(&nca);
887 if (ret)
888 netdev_err(ndp->ndev.dev,
889 "Error %d sending DCNT\n",
890 ret);
891 }
892
893 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
894
895 nca.channel = enable->id;
896 nca.package = enable->package->id;
897 nca.type = NCSI_PKT_CMD_ECNT;
898 ret = ncsi_xmit_cmd(&nca);
899 if (ret)
900 netdev_err(ndp->ndev.dev,
901 "Error %d sending ECNT\n",
902 ret);
903
904 return ret;
905 }
906
907 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
908 {
909 struct ncsi_package *np = ndp->active_package;
910 struct ncsi_channel *nc = ndp->active_channel;
911 struct ncsi_channel *hot_nc = NULL;
912 struct ncsi_dev *nd = &ndp->ndev;
913 struct net_device *dev = nd->dev;
914 struct ncsi_cmd_arg nca;
915 unsigned char index;
916 unsigned long flags;
917 int ret;
918
919 nca.ndp = ndp;
920 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
921 switch (nd->state) {
922 case ncsi_dev_state_config:
923 case ncsi_dev_state_config_sp:
924 ndp->pending_req_num = 1;
925
926 /* Select the specific package */
927 nca.type = NCSI_PKT_CMD_SP;
928 if (ndp->flags & NCSI_DEV_HWA)
929 nca.bytes[0] = 0;
930 else
931 nca.bytes[0] = 1;
932 nca.package = np->id;
933 nca.channel = NCSI_RESERVED_CHANNEL;
934 ret = ncsi_xmit_cmd(&nca);
935 if (ret) {
936 netdev_err(ndp->ndev.dev,
937 "NCSI: Failed to transmit CMD_SP\n");
938 goto error;
939 }
940
941 nd->state = ncsi_dev_state_config_cis;
942 break;
943 case ncsi_dev_state_config_cis:
944 ndp->pending_req_num = 1;
945
946 /* Clear initial state */
947 nca.type = NCSI_PKT_CMD_CIS;
948 nca.package = np->id;
949 nca.channel = nc->id;
950 ret = ncsi_xmit_cmd(&nca);
951 if (ret) {
952 netdev_err(ndp->ndev.dev,
953 "NCSI: Failed to transmit CMD_CIS\n");
954 goto error;
955 }
956
957 nd->state = ncsi_dev_state_config_oem_gma;
958 break;
959 case ncsi_dev_state_config_oem_gma:
960 nd->state = ncsi_dev_state_config_clear_vids;
961 ret = -1;
962
963 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
964 nca.type = NCSI_PKT_CMD_OEM;
965 nca.package = np->id;
966 nca.channel = nc->id;
967 ndp->pending_req_num = 1;
968 ret = ncsi_gma_handler(&nca, nc->version.mf_id);
969 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
970
971 if (ret < 0)
972 schedule_work(&ndp->work);
973
974 break;
975 case ncsi_dev_state_config_clear_vids:
976 case ncsi_dev_state_config_svf:
977 case ncsi_dev_state_config_ev:
978 case ncsi_dev_state_config_sma:
979 case ncsi_dev_state_config_ebf:
980 case ncsi_dev_state_config_dgmf:
981 case ncsi_dev_state_config_ecnt:
982 case ncsi_dev_state_config_ec:
983 case ncsi_dev_state_config_ae:
984 case ncsi_dev_state_config_gls:
985 ndp->pending_req_num = 1;
986
987 nca.package = np->id;
988 nca.channel = nc->id;
989
990 /* Clear any active filters on the channel before setting */
991 if (nd->state == ncsi_dev_state_config_clear_vids) {
992 ret = clear_one_vid(ndp, nc, &nca);
993 if (ret) {
994 nd->state = ncsi_dev_state_config_svf;
995 schedule_work(&ndp->work);
996 break;
997 }
998 /* Repeat */
999 nd->state = ncsi_dev_state_config_clear_vids;
1000 /* Add known VLAN tags to the filter */
1001 } else if (nd->state == ncsi_dev_state_config_svf) {
1002 ret = set_one_vid(ndp, nc, &nca);
1003 if (ret) {
1004 nd->state = ncsi_dev_state_config_ev;
1005 schedule_work(&ndp->work);
1006 break;
1007 }
1008 /* Repeat */
1009 nd->state = ncsi_dev_state_config_svf;
1010 /* Enable/Disable the VLAN filter */
1011 } else if (nd->state == ncsi_dev_state_config_ev) {
1012 if (list_empty(&ndp->vlan_vids)) {
1013 nca.type = NCSI_PKT_CMD_DV;
1014 } else {
1015 nca.type = NCSI_PKT_CMD_EV;
1016 nca.bytes[3] = NCSI_CAP_VLAN_NO;
1017 }
1018 nd->state = ncsi_dev_state_config_sma;
1019 } else if (nd->state == ncsi_dev_state_config_sma) {
1020 /* Use first entry in unicast filter table. Note that
1021 * the MAC filter table starts from entry 1 instead of
1022 * 0.
1023 */
1024 nca.type = NCSI_PKT_CMD_SMA;
1025 for (index = 0; index < 6; index++)
1026 nca.bytes[index] = dev->dev_addr[index];
1027 nca.bytes[6] = 0x1;
1028 nca.bytes[7] = 0x1;
1029 nd->state = ncsi_dev_state_config_ebf;
1030 } else if (nd->state == ncsi_dev_state_config_ebf) {
1031 nca.type = NCSI_PKT_CMD_EBF;
1032 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
1033 /* if multicast global filtering is supported then
1034 * disable it so that all multicast packet will be
1035 * forwarded to management controller
1036 */
1037 if (nc->caps[NCSI_CAP_GENERIC].cap &
1038 NCSI_CAP_GENERIC_MC)
1039 nd->state = ncsi_dev_state_config_dgmf;
1040 else if (ncsi_channel_is_tx(ndp, nc))
1041 nd->state = ncsi_dev_state_config_ecnt;
1042 else
1043 nd->state = ncsi_dev_state_config_ec;
1044 } else if (nd->state == ncsi_dev_state_config_dgmf) {
1045 nca.type = NCSI_PKT_CMD_DGMF;
1046 if (ncsi_channel_is_tx(ndp, nc))
1047 nd->state = ncsi_dev_state_config_ecnt;
1048 else
1049 nd->state = ncsi_dev_state_config_ec;
1050 } else if (nd->state == ncsi_dev_state_config_ecnt) {
1051 if (np->preferred_channel &&
1052 nc != np->preferred_channel)
1053 netdev_info(ndp->ndev.dev,
1054 "NCSI: Tx failed over to channel %u\n",
1055 nc->id);
1056 nca.type = NCSI_PKT_CMD_ECNT;
1057 nd->state = ncsi_dev_state_config_ec;
1058 } else if (nd->state == ncsi_dev_state_config_ec) {
1059 /* Enable AEN if it's supported */
1060 nca.type = NCSI_PKT_CMD_EC;
1061 nd->state = ncsi_dev_state_config_ae;
1062 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
1063 nd->state = ncsi_dev_state_config_gls;
1064 } else if (nd->state == ncsi_dev_state_config_ae) {
1065 nca.type = NCSI_PKT_CMD_AE;
1066 nca.bytes[0] = 0;
1067 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
1068 nd->state = ncsi_dev_state_config_gls;
1069 } else if (nd->state == ncsi_dev_state_config_gls) {
1070 nca.type = NCSI_PKT_CMD_GLS;
1071 nd->state = ncsi_dev_state_config_done;
1072 }
1073
1074 ret = ncsi_xmit_cmd(&nca);
1075 if (ret) {
1076 netdev_err(ndp->ndev.dev,
1077 "NCSI: Failed to transmit CMD %x\n",
1078 nca.type);
1079 goto error;
1080 }
1081 break;
1082 case ncsi_dev_state_config_done:
1083 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
1084 nc->id);
1085 spin_lock_irqsave(&nc->lock, flags);
1086 nc->state = NCSI_CHANNEL_ACTIVE;
1087
1088 if (ndp->flags & NCSI_DEV_RESET) {
1089 /* A reset event happened during config, start it now */
1090 nc->reconfigure_needed = false;
1091 spin_unlock_irqrestore(&nc->lock, flags);
1092 ncsi_reset_dev(nd);
1093 break;
1094 }
1095
1096 if (nc->reconfigure_needed) {
1097 /* This channel's configuration has been updated
1098 * part-way during the config state - start the
1099 * channel configuration over
1100 */
1101 nc->reconfigure_needed = false;
1102 nc->state = NCSI_CHANNEL_INACTIVE;
1103 spin_unlock_irqrestore(&nc->lock, flags);
1104
1105 spin_lock_irqsave(&ndp->lock, flags);
1106 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1107 spin_unlock_irqrestore(&ndp->lock, flags);
1108
1109 netdev_dbg(dev, "Dirty NCSI channel state reset\n");
1110 ncsi_process_next_channel(ndp);
1111 break;
1112 }
1113
1114 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
1115 hot_nc = nc;
1116 } else {
1117 hot_nc = NULL;
1118 netdev_dbg(ndp->ndev.dev,
1119 "NCSI: channel %u link down after config\n",
1120 nc->id);
1121 }
1122 spin_unlock_irqrestore(&nc->lock, flags);
1123
1124 /* Update the hot channel */
1125 spin_lock_irqsave(&ndp->lock, flags);
1126 ndp->hot_channel = hot_nc;
1127 spin_unlock_irqrestore(&ndp->lock, flags);
1128
1129 ncsi_start_channel_monitor(nc);
1130 ncsi_process_next_channel(ndp);
1131 break;
1132 default:
1133 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
1134 nd->state);
1135 }
1136
1137 return;
1138
1139 error:
1140 ncsi_report_link(ndp, true);
1141 }
1142
1143 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
1144 {
1145 struct ncsi_channel *nc, *found, *hot_nc;
1146 struct ncsi_channel_mode *ncm;
1147 unsigned long flags, cflags;
1148 struct ncsi_package *np;
1149 bool with_link;
1150
1151 spin_lock_irqsave(&ndp->lock, flags);
1152 hot_nc = ndp->hot_channel;
1153 spin_unlock_irqrestore(&ndp->lock, flags);
1154
1155 /* By default the search is done once an inactive channel with up
1156 * link is found, unless a preferred channel is set.
1157 * If multi_package or multi_channel are configured all channels in the
1158 * whitelist are added to the channel queue.
1159 */
1160 found = NULL;
1161 with_link = false;
1162 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1163 if (!(ndp->package_whitelist & (0x1 << np->id)))
1164 continue;
1165 NCSI_FOR_EACH_CHANNEL(np, nc) {
1166 if (!(np->channel_whitelist & (0x1 << nc->id)))
1167 continue;
1168
1169 spin_lock_irqsave(&nc->lock, cflags);
1170
1171 if (!list_empty(&nc->link) ||
1172 nc->state != NCSI_CHANNEL_INACTIVE) {
1173 spin_unlock_irqrestore(&nc->lock, cflags);
1174 continue;
1175 }
1176
1177 if (!found)
1178 found = nc;
1179
1180 if (nc == hot_nc)
1181 found = nc;
1182
1183 ncm = &nc->modes[NCSI_MODE_LINK];
1184 if (ncm->data[2] & 0x1) {
1185 found = nc;
1186 with_link = true;
1187 }
1188
1189 /* If multi_channel is enabled configure all valid
1190 * channels whether or not they currently have link
1191 * so they will have AENs enabled.
1192 */
1193 if (with_link || np->multi_channel) {
1194 spin_lock_irqsave(&ndp->lock, flags);
1195 list_add_tail_rcu(&nc->link,
1196 &ndp->channel_queue);
1197 spin_unlock_irqrestore(&ndp->lock, flags);
1198
1199 netdev_dbg(ndp->ndev.dev,
1200 "NCSI: Channel %u added to queue (link %s)\n",
1201 nc->id,
1202 ncm->data[2] & 0x1 ? "up" : "down");
1203 }
1204
1205 spin_unlock_irqrestore(&nc->lock, cflags);
1206
1207 if (with_link && !np->multi_channel)
1208 break;
1209 }
1210 if (with_link && !ndp->multi_package)
1211 break;
1212 }
1213
1214 if (list_empty(&ndp->channel_queue) && found) {
1215 netdev_info(ndp->ndev.dev,
1216 "NCSI: No channel with link found, configuring channel %u\n",
1217 found->id);
1218 spin_lock_irqsave(&ndp->lock, flags);
1219 list_add_tail_rcu(&found->link, &ndp->channel_queue);
1220 spin_unlock_irqrestore(&ndp->lock, flags);
1221 } else if (!found) {
1222 netdev_warn(ndp->ndev.dev,
1223 "NCSI: No channel found to configure!\n");
1224 ncsi_report_link(ndp, true);
1225 return -ENODEV;
1226 }
1227
1228 return ncsi_process_next_channel(ndp);
1229 }
1230
1231 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
1232 {
1233 struct ncsi_package *np;
1234 struct ncsi_channel *nc;
1235 unsigned int cap;
1236 bool has_channel = false;
1237
1238 /* The hardware arbitration is disabled if any one channel
1239 * doesn't support explicitly.
1240 */
1241 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1242 NCSI_FOR_EACH_CHANNEL(np, nc) {
1243 has_channel = true;
1244
1245 cap = nc->caps[NCSI_CAP_GENERIC].cap;
1246 if (!(cap & NCSI_CAP_GENERIC_HWA) ||
1247 (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
1248 NCSI_CAP_GENERIC_HWA_SUPPORT) {
1249 ndp->flags &= ~NCSI_DEV_HWA;
1250 return false;
1251 }
1252 }
1253 }
1254
1255 if (has_channel) {
1256 ndp->flags |= NCSI_DEV_HWA;
1257 return true;
1258 }
1259
1260 ndp->flags &= ~NCSI_DEV_HWA;
1261 return false;
1262 }
1263
1264 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
1265 {
1266 struct ncsi_dev *nd = &ndp->ndev;
1267 struct ncsi_package *np;
1268 struct ncsi_channel *nc;
1269 struct ncsi_cmd_arg nca;
1270 unsigned char index;
1271 int ret;
1272
1273 nca.ndp = ndp;
1274 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
1275 switch (nd->state) {
1276 case ncsi_dev_state_probe:
1277 nd->state = ncsi_dev_state_probe_deselect;
1278 /* Fall through */
1279 case ncsi_dev_state_probe_deselect:
1280 ndp->pending_req_num = 8;
1281
1282 /* Deselect all possible packages */
1283 nca.type = NCSI_PKT_CMD_DP;
1284 nca.channel = NCSI_RESERVED_CHANNEL;
1285 for (index = 0; index < 8; index++) {
1286 nca.package = index;
1287 ret = ncsi_xmit_cmd(&nca);
1288 if (ret)
1289 goto error;
1290 }
1291
1292 nd->state = ncsi_dev_state_probe_package;
1293 break;
1294 case ncsi_dev_state_probe_package:
1295 ndp->pending_req_num = 1;
1296
1297 nca.type = NCSI_PKT_CMD_SP;
1298 nca.bytes[0] = 1;
1299 nca.package = ndp->package_probe_id;
1300 nca.channel = NCSI_RESERVED_CHANNEL;
1301 ret = ncsi_xmit_cmd(&nca);
1302 if (ret)
1303 goto error;
1304 nd->state = ncsi_dev_state_probe_channel;
1305 break;
1306 case ncsi_dev_state_probe_channel:
1307 ndp->active_package = ncsi_find_package(ndp,
1308 ndp->package_probe_id);
1309 if (!ndp->active_package) {
1310 /* No response */
1311 nd->state = ncsi_dev_state_probe_dp;
1312 schedule_work(&ndp->work);
1313 break;
1314 }
1315 nd->state = ncsi_dev_state_probe_cis;
1316 schedule_work(&ndp->work);
1317 break;
1318 case ncsi_dev_state_probe_cis:
1319 ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
1320
1321 /* Clear initial state */
1322 nca.type = NCSI_PKT_CMD_CIS;
1323 nca.package = ndp->active_package->id;
1324 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
1325 nca.channel = index;
1326 ret = ncsi_xmit_cmd(&nca);
1327 if (ret)
1328 goto error;
1329 }
1330
1331 nd->state = ncsi_dev_state_probe_gvi;
1332 break;
1333 case ncsi_dev_state_probe_gvi:
1334 case ncsi_dev_state_probe_gc:
1335 case ncsi_dev_state_probe_gls:
1336 np = ndp->active_package;
1337 ndp->pending_req_num = np->channel_num;
1338
1339 /* Retrieve version, capability or link status */
1340 if (nd->state == ncsi_dev_state_probe_gvi)
1341 nca.type = NCSI_PKT_CMD_GVI;
1342 else if (nd->state == ncsi_dev_state_probe_gc)
1343 nca.type = NCSI_PKT_CMD_GC;
1344 else
1345 nca.type = NCSI_PKT_CMD_GLS;
1346
1347 nca.package = np->id;
1348 NCSI_FOR_EACH_CHANNEL(np, nc) {
1349 nca.channel = nc->id;
1350 ret = ncsi_xmit_cmd(&nca);
1351 if (ret)
1352 goto error;
1353 }
1354
1355 if (nd->state == ncsi_dev_state_probe_gvi)
1356 nd->state = ncsi_dev_state_probe_gc;
1357 else if (nd->state == ncsi_dev_state_probe_gc)
1358 nd->state = ncsi_dev_state_probe_gls;
1359 else
1360 nd->state = ncsi_dev_state_probe_dp;
1361 break;
1362 case ncsi_dev_state_probe_dp:
1363 ndp->pending_req_num = 1;
1364
1365 /* Deselect the current package */
1366 nca.type = NCSI_PKT_CMD_DP;
1367 nca.package = ndp->package_probe_id;
1368 nca.channel = NCSI_RESERVED_CHANNEL;
1369 ret = ncsi_xmit_cmd(&nca);
1370 if (ret)
1371 goto error;
1372
1373 /* Probe next package */
1374 ndp->package_probe_id++;
1375 if (ndp->package_probe_id >= 8) {
1376 /* Probe finished */
1377 ndp->flags |= NCSI_DEV_PROBED;
1378 break;
1379 }
1380 nd->state = ncsi_dev_state_probe_package;
1381 ndp->active_package = NULL;
1382 break;
1383 default:
1384 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
1385 nd->state);
1386 }
1387
1388 if (ndp->flags & NCSI_DEV_PROBED) {
1389 /* Check if all packages have HWA support */
1390 ncsi_check_hwa(ndp);
1391 ncsi_choose_active_channel(ndp);
1392 }
1393
1394 return;
1395 error:
1396 netdev_err(ndp->ndev.dev,
1397 "NCSI: Failed to transmit cmd 0x%x during probe\n",
1398 nca.type);
1399 ncsi_report_link(ndp, true);
1400 }
1401
1402 static void ncsi_dev_work(struct work_struct *work)
1403 {
1404 struct ncsi_dev_priv *ndp = container_of(work,
1405 struct ncsi_dev_priv, work);
1406 struct ncsi_dev *nd = &ndp->ndev;
1407
1408 switch (nd->state & ncsi_dev_state_major) {
1409 case ncsi_dev_state_probe:
1410 ncsi_probe_channel(ndp);
1411 break;
1412 case ncsi_dev_state_suspend:
1413 ncsi_suspend_channel(ndp);
1414 break;
1415 case ncsi_dev_state_config:
1416 ncsi_configure_channel(ndp);
1417 break;
1418 default:
1419 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
1420 nd->state);
1421 }
1422 }
1423
1424 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
1425 {
1426 struct ncsi_channel *nc;
1427 int old_state;
1428 unsigned long flags;
1429
1430 spin_lock_irqsave(&ndp->lock, flags);
1431 nc = list_first_or_null_rcu(&ndp->channel_queue,
1432 struct ncsi_channel, link);
1433 if (!nc) {
1434 spin_unlock_irqrestore(&ndp->lock, flags);
1435 goto out;
1436 }
1437
1438 list_del_init(&nc->link);
1439 spin_unlock_irqrestore(&ndp->lock, flags);
1440
1441 spin_lock_irqsave(&nc->lock, flags);
1442 old_state = nc->state;
1443 nc->state = NCSI_CHANNEL_INVISIBLE;
1444 spin_unlock_irqrestore(&nc->lock, flags);
1445
1446 ndp->active_channel = nc;
1447 ndp->active_package = nc->package;
1448
1449 switch (old_state) {
1450 case NCSI_CHANNEL_INACTIVE:
1451 ndp->ndev.state = ncsi_dev_state_config;
1452 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
1453 nc->id);
1454 ncsi_configure_channel(ndp);
1455 break;
1456 case NCSI_CHANNEL_ACTIVE:
1457 ndp->ndev.state = ncsi_dev_state_suspend;
1458 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
1459 nc->id);
1460 ncsi_suspend_channel(ndp);
1461 break;
1462 default:
1463 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
1464 old_state, nc->package->id, nc->id);
1465 ncsi_report_link(ndp, false);
1466 return -EINVAL;
1467 }
1468
1469 return 0;
1470
1471 out:
1472 ndp->active_channel = NULL;
1473 ndp->active_package = NULL;
1474 if (ndp->flags & NCSI_DEV_RESHUFFLE) {
1475 ndp->flags &= ~NCSI_DEV_RESHUFFLE;
1476 return ncsi_choose_active_channel(ndp);
1477 }
1478
1479 ncsi_report_link(ndp, false);
1480 return -ENODEV;
1481 }
1482
1483 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
1484 {
1485 struct ncsi_dev *nd = &ndp->ndev;
1486 struct ncsi_channel *nc;
1487 struct ncsi_package *np;
1488 unsigned long flags;
1489 unsigned int n = 0;
1490
1491 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1492 NCSI_FOR_EACH_CHANNEL(np, nc) {
1493 spin_lock_irqsave(&nc->lock, flags);
1494
1495 /* Channels may be busy, mark dirty instead of
1496 * kicking if;
1497 * a) not ACTIVE (configured)
1498 * b) in the channel_queue (to be configured)
1499 * c) it's ndev is in the config state
1500 */
1501 if (nc->state != NCSI_CHANNEL_ACTIVE) {
1502 if ((ndp->ndev.state & 0xff00) ==
1503 ncsi_dev_state_config ||
1504 !list_empty(&nc->link)) {
1505 netdev_dbg(nd->dev,
1506 "NCSI: channel %p marked dirty\n",
1507 nc);
1508 nc->reconfigure_needed = true;
1509 }
1510 spin_unlock_irqrestore(&nc->lock, flags);
1511 continue;
1512 }
1513
1514 spin_unlock_irqrestore(&nc->lock, flags);
1515
1516 ncsi_stop_channel_monitor(nc);
1517 spin_lock_irqsave(&nc->lock, flags);
1518 nc->state = NCSI_CHANNEL_INACTIVE;
1519 spin_unlock_irqrestore(&nc->lock, flags);
1520
1521 spin_lock_irqsave(&ndp->lock, flags);
1522 list_add_tail_rcu(&nc->link, &ndp->channel_queue);
1523 spin_unlock_irqrestore(&ndp->lock, flags);
1524
1525 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
1526 n++;
1527 }
1528 }
1529
1530 return n;
1531 }
1532
1533 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1534 {
1535 struct ncsi_dev_priv *ndp;
1536 unsigned int n_vids = 0;
1537 struct vlan_vid *vlan;
1538 struct ncsi_dev *nd;
1539 bool found = false;
1540
1541 if (vid == 0)
1542 return 0;
1543
1544 nd = ncsi_find_dev(dev);
1545 if (!nd) {
1546 netdev_warn(dev, "NCSI: No net_device?\n");
1547 return 0;
1548 }
1549
1550 ndp = TO_NCSI_DEV_PRIV(nd);
1551
1552 /* Add the VLAN id to our internal list */
1553 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
1554 n_vids++;
1555 if (vlan->vid == vid) {
1556 netdev_dbg(dev, "NCSI: vid %u already registered\n",
1557 vid);
1558 return 0;
1559 }
1560 }
1561 if (n_vids >= NCSI_MAX_VLAN_VIDS) {
1562 netdev_warn(dev,
1563 "tried to add vlan id %u but NCSI max already registered (%u)\n",
1564 vid, NCSI_MAX_VLAN_VIDS);
1565 return -ENOSPC;
1566 }
1567
1568 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1569 if (!vlan)
1570 return -ENOMEM;
1571
1572 vlan->proto = proto;
1573 vlan->vid = vid;
1574 list_add_rcu(&vlan->list, &ndp->vlan_vids);
1575
1576 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
1577
1578 found = ncsi_kick_channels(ndp) != 0;
1579
1580 return found ? ncsi_process_next_channel(ndp) : 0;
1581 }
1582 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
1583
1584 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1585 {
1586 struct vlan_vid *vlan, *tmp;
1587 struct ncsi_dev_priv *ndp;
1588 struct ncsi_dev *nd;
1589 bool found = false;
1590
1591 if (vid == 0)
1592 return 0;
1593
1594 nd = ncsi_find_dev(dev);
1595 if (!nd) {
1596 netdev_warn(dev, "NCSI: no net_device?\n");
1597 return 0;
1598 }
1599
1600 ndp = TO_NCSI_DEV_PRIV(nd);
1601
1602 /* Remove the VLAN id from our internal list */
1603 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
1604 if (vlan->vid == vid) {
1605 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
1606 list_del_rcu(&vlan->list);
1607 found = true;
1608 kfree(vlan);
1609 }
1610
1611 if (!found) {
1612 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
1613 return -EINVAL;
1614 }
1615
1616 found = ncsi_kick_channels(ndp) != 0;
1617
1618 return found ? ncsi_process_next_channel(ndp) : 0;
1619 }
1620 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
1621
1622 struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
1623 void (*handler)(struct ncsi_dev *ndev))
1624 {
1625 struct ncsi_dev_priv *ndp;
1626 struct ncsi_dev *nd;
1627 unsigned long flags;
1628 int i;
1629
1630 /* Check if the device has been registered or not */
1631 nd = ncsi_find_dev(dev);
1632 if (nd)
1633 return nd;
1634
1635 /* Create NCSI device */
1636 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
1637 if (!ndp)
1638 return NULL;
1639
1640 nd = &ndp->ndev;
1641 nd->state = ncsi_dev_state_registered;
1642 nd->dev = dev;
1643 nd->handler = handler;
1644 ndp->pending_req_num = 0;
1645 INIT_LIST_HEAD(&ndp->channel_queue);
1646 INIT_LIST_HEAD(&ndp->vlan_vids);
1647 INIT_WORK(&ndp->work, ncsi_dev_work);
1648 ndp->package_whitelist = UINT_MAX;
1649
1650 /* Initialize private NCSI device */
1651 spin_lock_init(&ndp->lock);
1652 INIT_LIST_HEAD(&ndp->packages);
1653 ndp->request_id = NCSI_REQ_START_IDX;
1654 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
1655 ndp->requests[i].id = i;
1656 ndp->requests[i].ndp = ndp;
1657 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
1658 }
1659
1660 spin_lock_irqsave(&ncsi_dev_lock, flags);
1661 list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
1662 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1663
1664 /* Register NCSI packet Rx handler */
1665 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
1666 ndp->ptype.func = ncsi_rcv_rsp;
1667 ndp->ptype.dev = dev;
1668 dev_add_pack(&ndp->ptype);
1669
1670 /* Set up generic netlink interface */
1671 ncsi_init_netlink(dev);
1672
1673 return nd;
1674 }
1675 EXPORT_SYMBOL_GPL(ncsi_register_dev);
1676
1677 int ncsi_start_dev(struct ncsi_dev *nd)
1678 {
1679 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1680
1681 if (nd->state != ncsi_dev_state_registered &&
1682 nd->state != ncsi_dev_state_functional)
1683 return -ENOTTY;
1684
1685 if (!(ndp->flags & NCSI_DEV_PROBED)) {
1686 ndp->package_probe_id = 0;
1687 nd->state = ncsi_dev_state_probe;
1688 schedule_work(&ndp->work);
1689 return 0;
1690 }
1691
1692 return ncsi_reset_dev(nd);
1693 }
1694 EXPORT_SYMBOL_GPL(ncsi_start_dev);
1695
1696 void ncsi_stop_dev(struct ncsi_dev *nd)
1697 {
1698 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1699 struct ncsi_package *np;
1700 struct ncsi_channel *nc;
1701 bool chained;
1702 int old_state;
1703 unsigned long flags;
1704
1705 /* Stop the channel monitor on any active channels. Don't reset the
1706 * channel state so we know which were active when ncsi_start_dev()
1707 * is next called.
1708 */
1709 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1710 NCSI_FOR_EACH_CHANNEL(np, nc) {
1711 ncsi_stop_channel_monitor(nc);
1712
1713 spin_lock_irqsave(&nc->lock, flags);
1714 chained = !list_empty(&nc->link);
1715 old_state = nc->state;
1716 spin_unlock_irqrestore(&nc->lock, flags);
1717
1718 WARN_ON_ONCE(chained ||
1719 old_state == NCSI_CHANNEL_INVISIBLE);
1720 }
1721 }
1722
1723 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
1724 ncsi_report_link(ndp, true);
1725 }
1726 EXPORT_SYMBOL_GPL(ncsi_stop_dev);
1727
1728 int ncsi_reset_dev(struct ncsi_dev *nd)
1729 {
1730 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1731 struct ncsi_channel *nc, *active, *tmp;
1732 struct ncsi_package *np;
1733 unsigned long flags;
1734
1735 spin_lock_irqsave(&ndp->lock, flags);
1736
1737 if (!(ndp->flags & NCSI_DEV_RESET)) {
1738 /* Haven't been called yet, check states */
1739 switch (nd->state & ncsi_dev_state_major) {
1740 case ncsi_dev_state_registered:
1741 case ncsi_dev_state_probe:
1742 /* Not even probed yet - do nothing */
1743 spin_unlock_irqrestore(&ndp->lock, flags);
1744 return 0;
1745 case ncsi_dev_state_suspend:
1746 case ncsi_dev_state_config:
1747 /* Wait for the channel to finish its suspend/config
1748 * operation; once it finishes it will check for
1749 * NCSI_DEV_RESET and reset the state.
1750 */
1751 ndp->flags |= NCSI_DEV_RESET;
1752 spin_unlock_irqrestore(&ndp->lock, flags);
1753 return 0;
1754 }
1755 } else {
1756 switch (nd->state) {
1757 case ncsi_dev_state_suspend_done:
1758 case ncsi_dev_state_config_done:
1759 case ncsi_dev_state_functional:
1760 /* Ok */
1761 break;
1762 default:
1763 /* Current reset operation happening */
1764 spin_unlock_irqrestore(&ndp->lock, flags);
1765 return 0;
1766 }
1767 }
1768
1769 if (!list_empty(&ndp->channel_queue)) {
1770 /* Clear any channel queue we may have interrupted */
1771 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
1772 list_del_init(&nc->link);
1773 }
1774 spin_unlock_irqrestore(&ndp->lock, flags);
1775
1776 active = NULL;
1777 NCSI_FOR_EACH_PACKAGE(ndp, np) {
1778 NCSI_FOR_EACH_CHANNEL(np, nc) {
1779 spin_lock_irqsave(&nc->lock, flags);
1780
1781 if (nc->state == NCSI_CHANNEL_ACTIVE) {
1782 active = nc;
1783 nc->state = NCSI_CHANNEL_INVISIBLE;
1784 spin_unlock_irqrestore(&nc->lock, flags);
1785 ncsi_stop_channel_monitor(nc);
1786 break;
1787 }
1788
1789 spin_unlock_irqrestore(&nc->lock, flags);
1790 }
1791 if (active)
1792 break;
1793 }
1794
1795 if (!active) {
1796 /* Done */
1797 spin_lock_irqsave(&ndp->lock, flags);
1798 ndp->flags &= ~NCSI_DEV_RESET;
1799 spin_unlock_irqrestore(&ndp->lock, flags);
1800 return ncsi_choose_active_channel(ndp);
1801 }
1802
1803 spin_lock_irqsave(&ndp->lock, flags);
1804 ndp->flags |= NCSI_DEV_RESET;
1805 ndp->active_channel = active;
1806 ndp->active_package = active->package;
1807 spin_unlock_irqrestore(&ndp->lock, flags);
1808
1809 nd->state = ncsi_dev_state_suspend;
1810 schedule_work(&ndp->work);
1811 return 0;
1812 }
1813
1814 void ncsi_unregister_dev(struct ncsi_dev *nd)
1815 {
1816 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
1817 struct ncsi_package *np, *tmp;
1818 unsigned long flags;
1819
1820 dev_remove_pack(&ndp->ptype);
1821
1822 list_for_each_entry_safe(np, tmp, &ndp->packages, node)
1823 ncsi_remove_package(np);
1824
1825 spin_lock_irqsave(&ncsi_dev_lock, flags);
1826 list_del_rcu(&ndp->node);
1827 spin_unlock_irqrestore(&ncsi_dev_lock, flags);
1828
1829 ncsi_unregister_netlink(nd->dev);
1830
1831 kfree(ndp);
1832 }
1833 EXPORT_SYMBOL_GPL(ncsi_unregister_dev);
Linux with added FPC-III support