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[TG3]: Add tagged status support.
[linux-2.6/verdex.git] / drivers / infiniband / ulp / ipoib / ipoib_multicast.c
blob70208c3d21e28d415a8f9a82f886e62b64c4590d
1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 * $Id: ipoib_multicast.c 1362 2004-12-18 15:56:29Z roland $
33 */
34
35 #include <linux/skbuff.h>
36 #include <linux/rtnetlink.h>
37 #include <linux/ip.h>
38 #include <linux/in.h>
39 #include <linux/igmp.h>
40 #include <linux/inetdevice.h>
41 #include <linux/delay.h>
42 #include <linux/completion.h>
43
44 #include "ipoib.h"
45
46 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
47 static int mcast_debug_level;
48
49 module_param(mcast_debug_level, int, 0644);
50 MODULE_PARM_DESC(mcast_debug_level,
51 "Enable multicast debug tracing if > 0");
52 #endif
53
54 static DECLARE_MUTEX(mcast_mutex);
55
56 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
57 struct ipoib_mcast {
58 struct ib_sa_mcmember_rec mcmember;
59 struct ipoib_ah *ah;
60
61 struct rb_node rb_node;
62 struct list_head list;
63 struct completion done;
64
65 int query_id;
66 struct ib_sa_query *query;
67
68 unsigned long created;
69 unsigned long backoff;
70
71 unsigned long flags;
72 unsigned char logcount;
73
74 struct list_head neigh_list;
75
76 struct sk_buff_head pkt_queue;
77
78 struct net_device *dev;
79 };
80
81 struct ipoib_mcast_iter {
82 struct net_device *dev;
83 union ib_gid mgid;
84 unsigned long created;
85 unsigned int queuelen;
86 unsigned int complete;
87 unsigned int send_only;
88 };
89
90 static void ipoib_mcast_free(struct ipoib_mcast *mcast)
91 {
92 struct net_device *dev = mcast->dev;
93 struct ipoib_dev_priv *priv = netdev_priv(dev);
94 struct ipoib_neigh *neigh, *tmp;
95 unsigned long flags;
96 LIST_HEAD(ah_list);
97 struct ipoib_ah *ah, *tah;
98
99 ipoib_dbg_mcast(netdev_priv(dev),
100 "deleting multicast group " IPOIB_GID_FMT "\n",
101 IPOIB_GID_ARG(mcast->mcmember.mgid));
102
103 spin_lock_irqsave(&priv->lock, flags);
104
105 list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) {
106 if (neigh->ah)
107 list_add_tail(&neigh->ah->list, &ah_list);
108 *to_ipoib_neigh(neigh->neighbour) = NULL;
109 neigh->neighbour->ops->destructor = NULL;
110 kfree(neigh);
111 }
112
113 spin_unlock_irqrestore(&priv->lock, flags);
114
115 list_for_each_entry_safe(ah, tah, &ah_list, list)
116 ipoib_put_ah(ah);
117
118 if (mcast->ah)
119 ipoib_put_ah(mcast->ah);
120
121 while (!skb_queue_empty(&mcast->pkt_queue)) {
122 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
123
124 skb->dev = dev;
125 dev_kfree_skb_any(skb);
126 }
127
128 kfree(mcast);
129 }
130
131 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
132 int can_sleep)
133 {
134 struct ipoib_mcast *mcast;
135
136 mcast = kmalloc(sizeof (*mcast), can_sleep ? GFP_KERNEL : GFP_ATOMIC);
137 if (!mcast)
138 return NULL;
139
140 memset(mcast, 0, sizeof (*mcast));
141
142 init_completion(&mcast->done);
143
144 mcast->dev = dev;
145 mcast->created = jiffies;
146 mcast->backoff = HZ;
147 mcast->logcount = 0;
148
149 INIT_LIST_HEAD(&mcast->list);
150 INIT_LIST_HEAD(&mcast->neigh_list);
151 skb_queue_head_init(&mcast->pkt_queue);
152
153 mcast->ah = NULL;
154 mcast->query = NULL;
155
156 return mcast;
157 }
158
159 static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid)
160 {
161 struct ipoib_dev_priv *priv = netdev_priv(dev);
162 struct rb_node *n = priv->multicast_tree.rb_node;
163
164 while (n) {
165 struct ipoib_mcast *mcast;
166 int ret;
167
168 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
169
170 ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw,
171 sizeof (union ib_gid));
172 if (ret < 0)
173 n = n->rb_left;
174 else if (ret > 0)
175 n = n->rb_right;
176 else
177 return mcast;
178 }
179
180 return NULL;
181 }
182
183 static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast)
184 {
185 struct ipoib_dev_priv *priv = netdev_priv(dev);
186 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL;
187
188 while (*n) {
189 struct ipoib_mcast *tmcast;
190 int ret;
191
192 pn = *n;
193 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
194
195 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw,
196 sizeof (union ib_gid));
197 if (ret < 0)
198 n = &pn->rb_left;
199 else if (ret > 0)
200 n = &pn->rb_right;
201 else
202 return -EEXIST;
203 }
204
205 rb_link_node(&mcast->rb_node, pn, n);
206 rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
207
208 return 0;
209 }
210
211 static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
212 struct ib_sa_mcmember_rec *mcmember)
213 {
214 struct net_device *dev = mcast->dev;
215 struct ipoib_dev_priv *priv = netdev_priv(dev);
216 int ret;
217
218 mcast->mcmember = *mcmember;
219
220 /* Set the cached Q_Key before we attach if it's the broadcast group */
221 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
222 sizeof (union ib_gid))) {
223 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
224 priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
225 }
226
227 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
228 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
229 ipoib_warn(priv, "multicast group " IPOIB_GID_FMT
230 " already attached\n",
231 IPOIB_GID_ARG(mcast->mcmember.mgid));
232
233 return 0;
234 }
235
236 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
237 &mcast->mcmember.mgid);
238 if (ret < 0) {
239 ipoib_warn(priv, "couldn't attach QP to multicast group "
240 IPOIB_GID_FMT "\n",
241 IPOIB_GID_ARG(mcast->mcmember.mgid));
242
243 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
244 return ret;
245 }
246 }
247
248 {
249 struct ib_ah_attr av = {
250 .dlid = be16_to_cpu(mcast->mcmember.mlid),
251 .port_num = priv->port,
252 .sl = mcast->mcmember.sl,
253 .ah_flags = IB_AH_GRH,
254 .grh = {
255 .flow_label = be32_to_cpu(mcast->mcmember.flow_label),
256 .hop_limit = mcast->mcmember.hop_limit,
257 .sgid_index = 0,
258 .traffic_class = mcast->mcmember.traffic_class
259 }
260 };
261 int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate);
262
263 av.grh.dgid = mcast->mcmember.mgid;
264
265 if (path_rate > 0 && priv->local_rate > path_rate)
266 av.static_rate = (priv->local_rate - 1) / path_rate;
267
268 ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n",
269 av.static_rate, priv->local_rate,
270 ib_sa_rate_enum_to_int(mcast->mcmember.rate));
271
272 mcast->ah = ipoib_create_ah(dev, priv->pd, &av);
273 if (!mcast->ah) {
274 ipoib_warn(priv, "ib_address_create failed\n");
275 } else {
276 ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT
277 " AV %p, LID 0x%04x, SL %d\n",
278 IPOIB_GID_ARG(mcast->mcmember.mgid),
279 mcast->ah->ah,
280 be16_to_cpu(mcast->mcmember.mlid),
281 mcast->mcmember.sl);
282 }
283 }
284
285 /* actually send any queued packets */
286 while (!skb_queue_empty(&mcast->pkt_queue)) {
287 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
288
289 skb->dev = dev;
290
291 if (!skb->dst || !skb->dst->neighbour) {
292 /* put pseudoheader back on for next time */
293 skb_push(skb, sizeof (struct ipoib_pseudoheader));
294 }
295
296 if (dev_queue_xmit(skb))
297 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
298 }
299
300 return 0;
301 }
302
303 static void
304 ipoib_mcast_sendonly_join_complete(int status,
305 struct ib_sa_mcmember_rec *mcmember,
306 void *mcast_ptr)
307 {
308 struct ipoib_mcast *mcast = mcast_ptr;
309 struct net_device *dev = mcast->dev;
310
311 if (!status)
312 ipoib_mcast_join_finish(mcast, mcmember);
313 else {
314 if (mcast->logcount++ < 20)
315 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for "
316 IPOIB_GID_FMT ", status %d\n",
317 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
318
319 /* Flush out any queued packets */
320 while (!skb_queue_empty(&mcast->pkt_queue)) {
321 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
322
323 skb->dev = dev;
324
325 dev_kfree_skb_any(skb);
326 }
327
328 /* Clear the busy flag so we try again */
329 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
330 }
331
332 complete(&mcast->done);
333 }
334
335 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
336 {
337 struct net_device *dev = mcast->dev;
338 struct ipoib_dev_priv *priv = netdev_priv(dev);
339 struct ib_sa_mcmember_rec rec = {
340 #if 0 /* Some SMs don't support send-only yet */
341 .join_state = 4
342 #else
343 .join_state = 1
344 #endif
345 };
346 int ret = 0;
347
348 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
349 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
350 return -ENODEV;
351 }
352
353 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
354 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
355 return -EBUSY;
356 }
357
358 rec.mgid = mcast->mcmember.mgid;
359 rec.port_gid = priv->local_gid;
360 rec.pkey = be16_to_cpu(priv->pkey);
361
362 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec,
363 IB_SA_MCMEMBER_REC_MGID |
364 IB_SA_MCMEMBER_REC_PORT_GID |
365 IB_SA_MCMEMBER_REC_PKEY |
366 IB_SA_MCMEMBER_REC_JOIN_STATE,
367 1000, GFP_ATOMIC,
368 ipoib_mcast_sendonly_join_complete,
369 mcast, &mcast->query);
370 if (ret < 0) {
371 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n",
372 ret);
373 } else {
374 ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT
375 ", starting join\n",
376 IPOIB_GID_ARG(mcast->mcmember.mgid));
377
378 mcast->query_id = ret;
379 }
380
381 return ret;
382 }
383
384 static void ipoib_mcast_join_complete(int status,
385 struct ib_sa_mcmember_rec *mcmember,
386 void *mcast_ptr)
387 {
388 struct ipoib_mcast *mcast = mcast_ptr;
389 struct net_device *dev = mcast->dev;
390 struct ipoib_dev_priv *priv = netdev_priv(dev);
391
392 ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT
393 " (status %d)\n",
394 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
395
396 if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) {
397 mcast->backoff = HZ;
398 down(&mcast_mutex);
399 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
400 queue_work(ipoib_workqueue, &priv->mcast_task);
401 up(&mcast_mutex);
402 complete(&mcast->done);
403 return;
404 }
405
406 if (status == -EINTR) {
407 complete(&mcast->done);
408 return;
409 }
410
411 if (status && mcast->logcount++ < 20) {
412 if (status == -ETIMEDOUT || status == -EINTR) {
413 ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT
414 ", status %d\n",
415 IPOIB_GID_ARG(mcast->mcmember.mgid),
416 status);
417 } else {
418 ipoib_warn(priv, "multicast join failed for "
419 IPOIB_GID_FMT ", status %d\n",
420 IPOIB_GID_ARG(mcast->mcmember.mgid),
421 status);
422 }
423 }
424
425 mcast->backoff *= 2;
426 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
427 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
428
429 mcast->query = NULL;
430
431 down(&mcast_mutex);
432 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) {
433 if (status == -ETIMEDOUT)
434 queue_work(ipoib_workqueue, &priv->mcast_task);
435 else
436 queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
437 mcast->backoff * HZ);
438 } else
439 complete(&mcast->done);
440 up(&mcast_mutex);
441
442 return;
443 }
444
445 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
446 int create)
447 {
448 struct ipoib_dev_priv *priv = netdev_priv(dev);
449 struct ib_sa_mcmember_rec rec = {
450 .join_state = 1
451 };
452 ib_sa_comp_mask comp_mask;
453 int ret = 0;
454
455 ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n",
456 IPOIB_GID_ARG(mcast->mcmember.mgid));
457
458 rec.mgid = mcast->mcmember.mgid;
459 rec.port_gid = priv->local_gid;
460 rec.pkey = be16_to_cpu(priv->pkey);
461
462 comp_mask =
463 IB_SA_MCMEMBER_REC_MGID |
464 IB_SA_MCMEMBER_REC_PORT_GID |
465 IB_SA_MCMEMBER_REC_PKEY |
466 IB_SA_MCMEMBER_REC_JOIN_STATE;
467
468 if (create) {
469 comp_mask |=
470 IB_SA_MCMEMBER_REC_QKEY |
471 IB_SA_MCMEMBER_REC_SL |
472 IB_SA_MCMEMBER_REC_FLOW_LABEL |
473 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
474
475 rec.qkey = priv->broadcast->mcmember.qkey;
476 rec.sl = priv->broadcast->mcmember.sl;
477 rec.flow_label = priv->broadcast->mcmember.flow_label;
478 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
479 }
480
481 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask,
482 mcast->backoff * 1000, GFP_ATOMIC,
483 ipoib_mcast_join_complete,
484 mcast, &mcast->query);
485
486 if (ret < 0) {
487 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret);
488
489 mcast->backoff *= 2;
490 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
491 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
492
493 down(&mcast_mutex);
494 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
495 queue_delayed_work(ipoib_workqueue,
496 &priv->mcast_task,
497 mcast->backoff);
498 up(&mcast_mutex);
499 } else
500 mcast->query_id = ret;
501 }
502
503 void ipoib_mcast_join_task(void *dev_ptr)
504 {
505 struct net_device *dev = dev_ptr;
506 struct ipoib_dev_priv *priv = netdev_priv(dev);
507
508 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
509 return;
510
511 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
512 ipoib_warn(priv, "ib_gid_entry_get() failed\n");
513 else
514 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
515
516 {
517 struct ib_port_attr attr;
518
519 if (!ib_query_port(priv->ca, priv->port, &attr)) {
520 priv->local_lid = attr.lid;
521 priv->local_rate = attr.active_speed *
522 ib_width_enum_to_int(attr.active_width);
523 } else
524 ipoib_warn(priv, "ib_query_port failed\n");
525 }
526
527 if (!priv->broadcast) {
528 priv->broadcast = ipoib_mcast_alloc(dev, 1);
529 if (!priv->broadcast) {
530 ipoib_warn(priv, "failed to allocate broadcast group\n");
531 down(&mcast_mutex);
532 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
533 queue_delayed_work(ipoib_workqueue,
534 &priv->mcast_task, HZ);
535 up(&mcast_mutex);
536 return;
537 }
538
539 memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
540 sizeof (union ib_gid));
541
542 spin_lock_irq(&priv->lock);
543 __ipoib_mcast_add(dev, priv->broadcast);
544 spin_unlock_irq(&priv->lock);
545 }
546
547 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
548 ipoib_mcast_join(dev, priv->broadcast, 0);
549 return;
550 }
551
552 while (1) {
553 struct ipoib_mcast *mcast = NULL;
554
555 spin_lock_irq(&priv->lock);
556 list_for_each_entry(mcast, &priv->multicast_list, list) {
557 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
558 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
559 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
560 /* Found the next unjoined group */
561 break;
562 }
563 }
564 spin_unlock_irq(&priv->lock);
565
566 if (&mcast->list == &priv->multicast_list) {
567 /* All done */
568 break;
569 }
570
571 ipoib_mcast_join(dev, mcast, 1);
572 return;
573 }
574
575 priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) -
576 IPOIB_ENCAP_LEN;
577 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
578
579 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
580
581 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
582 netif_carrier_on(dev);
583 }
584
585 int ipoib_mcast_start_thread(struct net_device *dev)
586 {
587 struct ipoib_dev_priv *priv = netdev_priv(dev);
588
589 ipoib_dbg_mcast(priv, "starting multicast thread\n");
590
591 down(&mcast_mutex);
592 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
593 queue_work(ipoib_workqueue, &priv->mcast_task);
594 up(&mcast_mutex);
595
596 return 0;
597 }
598
599 int ipoib_mcast_stop_thread(struct net_device *dev)
600 {
601 struct ipoib_dev_priv *priv = netdev_priv(dev);
602 struct ipoib_mcast *mcast;
603
604 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
605
606 down(&mcast_mutex);
607 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
608 cancel_delayed_work(&priv->mcast_task);
609 up(&mcast_mutex);
610
611 flush_workqueue(ipoib_workqueue);
612
613 if (priv->broadcast && priv->broadcast->query) {
614 ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query);
615 priv->broadcast->query = NULL;
616 ipoib_dbg_mcast(priv, "waiting for bcast\n");
617 wait_for_completion(&priv->broadcast->done);
618 }
619
620 list_for_each_entry(mcast, &priv->multicast_list, list) {
621 if (mcast->query) {
622 ib_sa_cancel_query(mcast->query_id, mcast->query);
623 mcast->query = NULL;
624 ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n",
625 IPOIB_GID_ARG(mcast->mcmember.mgid));
626 wait_for_completion(&mcast->done);
627 }
628 }
629
630 return 0;
631 }
632
633 static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
634 {
635 struct ipoib_dev_priv *priv = netdev_priv(dev);
636 struct ib_sa_mcmember_rec rec = {
637 .join_state = 1
638 };
639 int ret = 0;
640
641 if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags))
642 return 0;
643
644 ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n",
645 IPOIB_GID_ARG(mcast->mcmember.mgid));
646
647 rec.mgid = mcast->mcmember.mgid;
648 rec.port_gid = priv->local_gid;
649 rec.pkey = be16_to_cpu(priv->pkey);
650
651 /* Remove ourselves from the multicast group */
652 ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid),
653 &mcast->mcmember.mgid);
654 if (ret)
655 ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret);
656
657 /*
658 * Just make one shot at leaving and don't wait for a reply;
659 * if we fail, too bad.
660 */
661 ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec,
662 IB_SA_MCMEMBER_REC_MGID |
663 IB_SA_MCMEMBER_REC_PORT_GID |
664 IB_SA_MCMEMBER_REC_PKEY |
665 IB_SA_MCMEMBER_REC_JOIN_STATE,
666 0, GFP_ATOMIC, NULL,
667 mcast, &mcast->query);
668 if (ret < 0)
669 ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed "
670 "for leave (result = %d)\n", ret);
671
672 return 0;
673 }
674
675 void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
676 struct sk_buff *skb)
677 {
678 struct ipoib_dev_priv *priv = netdev_priv(dev);
679 struct ipoib_mcast *mcast;
680
681 /*
682 * We can only be called from ipoib_start_xmit, so we're
683 * inside tx_lock -- no need to save/restore flags.
684 */
685 spin_lock(&priv->lock);
686
687 mcast = __ipoib_mcast_find(dev, mgid);
688 if (!mcast) {
689 /* Let's create a new send only group now */
690 ipoib_dbg_mcast(priv, "setting up send only multicast group for "
691 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid));
692
693 mcast = ipoib_mcast_alloc(dev, 0);
694 if (!mcast) {
695 ipoib_warn(priv, "unable to allocate memory for "
696 "multicast structure\n");
697 dev_kfree_skb_any(skb);
698 goto out;
699 }
700
701 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
702 mcast->mcmember.mgid = *mgid;
703 __ipoib_mcast_add(dev, mcast);
704 list_add_tail(&mcast->list, &priv->multicast_list);
705 }
706
707 if (!mcast->ah) {
708 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
709 skb_queue_tail(&mcast->pkt_queue, skb);
710 else
711 dev_kfree_skb_any(skb);
712
713 if (mcast->query)
714 ipoib_dbg_mcast(priv, "no address vector, "
715 "but multicast join already started\n");
716 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
717 ipoib_mcast_sendonly_join(mcast);
718
719 /*
720 * If lookup completes between here and out:, don't
721 * want to send packet twice.
722 */
723 mcast = NULL;
724 }
725
726 out:
727 if (mcast && mcast->ah) {
728 if (skb->dst &&
729 skb->dst->neighbour &&
730 !*to_ipoib_neigh(skb->dst->neighbour)) {
731 struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
732
733 if (neigh) {
734 kref_get(&mcast->ah->ref);
735 neigh->ah = mcast->ah;
736 neigh->neighbour = skb->dst->neighbour;
737 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
738 list_add_tail(&neigh->list, &mcast->neigh_list);
739 }
740 }
741
742 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
743 }
744
745 spin_unlock(&priv->lock);
746 }
747
748 void ipoib_mcast_dev_flush(struct net_device *dev)
749 {
750 struct ipoib_dev_priv *priv = netdev_priv(dev);
751 LIST_HEAD(remove_list);
752 struct ipoib_mcast *mcast, *tmcast, *nmcast;
753 unsigned long flags;
754
755 ipoib_dbg_mcast(priv, "flushing multicast list\n");
756
757 spin_lock_irqsave(&priv->lock, flags);
758 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
759 nmcast = ipoib_mcast_alloc(dev, 0);
760 if (nmcast) {
761 nmcast->flags =
762 mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY);
763
764 nmcast->mcmember.mgid = mcast->mcmember.mgid;
765
766 /* Add the new group in before the to-be-destroyed group */
767 list_add_tail(&nmcast->list, &mcast->list);
768 list_del_init(&mcast->list);
769
770 rb_replace_node(&mcast->rb_node, &nmcast->rb_node,
771 &priv->multicast_tree);
772
773 list_add_tail(&mcast->list, &remove_list);
774 } else {
775 ipoib_warn(priv, "could not reallocate multicast group "
776 IPOIB_GID_FMT "\n",
777 IPOIB_GID_ARG(mcast->mcmember.mgid));
778 }
779 }
780
781 if (priv->broadcast) {
782 nmcast = ipoib_mcast_alloc(dev, 0);
783 if (nmcast) {
784 nmcast->mcmember.mgid = priv->broadcast->mcmember.mgid;
785
786 rb_replace_node(&priv->broadcast->rb_node,
787 &nmcast->rb_node,
788 &priv->multicast_tree);
789
790 list_add_tail(&priv->broadcast->list, &remove_list);
791 }
792
793 priv->broadcast = nmcast;
794 }
795
796 spin_unlock_irqrestore(&priv->lock, flags);
797
798 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
799 ipoib_mcast_leave(dev, mcast);
800 ipoib_mcast_free(mcast);
801 }
802 }
803
804 void ipoib_mcast_dev_down(struct net_device *dev)
805 {
806 struct ipoib_dev_priv *priv = netdev_priv(dev);
807 unsigned long flags;
808
809 /* Delete broadcast since it will be recreated */
810 if (priv->broadcast) {
811 ipoib_dbg_mcast(priv, "deleting broadcast group\n");
812
813 spin_lock_irqsave(&priv->lock, flags);
814 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
815 spin_unlock_irqrestore(&priv->lock, flags);
816 ipoib_mcast_leave(dev, priv->broadcast);
817 ipoib_mcast_free(priv->broadcast);
818 priv->broadcast = NULL;
819 }
820 }
821
822 void ipoib_mcast_restart_task(void *dev_ptr)
823 {
824 struct net_device *dev = dev_ptr;
825 struct ipoib_dev_priv *priv = netdev_priv(dev);
826 struct dev_mc_list *mclist;
827 struct ipoib_mcast *mcast, *tmcast;
828 LIST_HEAD(remove_list);
829 unsigned long flags;
830
831 ipoib_dbg_mcast(priv, "restarting multicast task\n");
832
833 ipoib_mcast_stop_thread(dev);
834
835 spin_lock_irqsave(&priv->lock, flags);
836
837 /*
838 * Unfortunately, the networking core only gives us a list of all of
839 * the multicast hardware addresses. We need to figure out which ones
840 * are new and which ones have been removed
841 */
842
843 /* Clear out the found flag */
844 list_for_each_entry(mcast, &priv->multicast_list, list)
845 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
846
847 /* Mark all of the entries that are found or don't exist */
848 for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
849 union ib_gid mgid;
850
851 memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid);
852
853 /* Add in the P_Key */
854 mgid.raw[4] = (priv->pkey >> 8) & 0xff;
855 mgid.raw[5] = priv->pkey & 0xff;
856
857 mcast = __ipoib_mcast_find(dev, &mgid);
858 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
859 struct ipoib_mcast *nmcast;
860
861 /* Not found or send-only group, let's add a new entry */
862 ipoib_dbg_mcast(priv, "adding multicast entry for mgid "
863 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid));
864
865 nmcast = ipoib_mcast_alloc(dev, 0);
866 if (!nmcast) {
867 ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
868 continue;
869 }
870
871 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
872
873 nmcast->mcmember.mgid = mgid;
874
875 if (mcast) {
876 /* Destroy the send only entry */
877 list_del(&mcast->list);
878 list_add_tail(&mcast->list, &remove_list);
879
880 rb_replace_node(&mcast->rb_node,
881 &nmcast->rb_node,
882 &priv->multicast_tree);
883 } else
884 __ipoib_mcast_add(dev, nmcast);
885
886 list_add_tail(&nmcast->list, &priv->multicast_list);
887 }
888
889 if (mcast)
890 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
891 }
892
893 /* Remove all of the entries don't exist anymore */
894 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
895 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
896 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
897 ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n",
898 IPOIB_GID_ARG(mcast->mcmember.mgid));
899
900 rb_erase(&mcast->rb_node, &priv->multicast_tree);
901
902 /* Move to the remove list */
903 list_del(&mcast->list);
904 list_add_tail(&mcast->list, &remove_list);
905 }
906 }
907 spin_unlock_irqrestore(&priv->lock, flags);
908
909 /* We have to cancel outside of the spinlock */
910 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
911 ipoib_mcast_leave(mcast->dev, mcast);
912 ipoib_mcast_free(mcast);
913 }
914
915 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
916 ipoib_mcast_start_thread(dev);
917 }
918
919 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
920 {
921 struct ipoib_mcast_iter *iter;
922
923 iter = kmalloc(sizeof *iter, GFP_KERNEL);
924 if (!iter)
925 return NULL;
926
927 iter->dev = dev;
928 memset(iter->mgid.raw, 0, sizeof iter->mgid);
929
930 if (ipoib_mcast_iter_next(iter)) {
931 ipoib_mcast_iter_free(iter);
932 return NULL;
933 }
934
935 return iter;
936 }
937
938 void ipoib_mcast_iter_free(struct ipoib_mcast_iter *iter)
939 {
940 kfree(iter);
941 }
942
943 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
944 {
945 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
946 struct rb_node *n;
947 struct ipoib_mcast *mcast;
948 int ret = 1;
949
950 spin_lock_irq(&priv->lock);
951
952 n = rb_first(&priv->multicast_tree);
953
954 while (n) {
955 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
956
957 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
958 sizeof (union ib_gid)) < 0) {
959 iter->mgid = mcast->mcmember.mgid;
960 iter->created = mcast->created;
961 iter->queuelen = skb_queue_len(&mcast->pkt_queue);
962 iter->complete = !!mcast->ah;
963 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
964
965 ret = 0;
966
967 break;
968 }
969
970 n = rb_next(n);
971 }
972
973 spin_unlock_irq(&priv->lock);
974
975 return ret;
976 }
977
978 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
979 union ib_gid *mgid,
980 unsigned long *created,
981 unsigned int *queuelen,
982 unsigned int *complete,
983 unsigned int *send_only)
984 {
985 *mgid = iter->mgid;
986 *created = iter->created;
987 *queuelen = iter->queuelen;
988 *complete = iter->complete;
989 *send_only = iter->send_only;
990 }
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