?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
IPoIB/cm: Use common CQ for CM send completions
[linux-2.6/verdex.git] / drivers / infiniband / ulp / ipoib / ipoib_main.c
blobace2345960ee547aca77cbe0df85e095532f2bb1
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $
35 */
36
37 #include "ipoib.h"
38
39 #include <linux/module.h>
40
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/kernel.h>
44
45 #include <linux/if_arp.h> /* For ARPHRD_xxx */
46
47 #include <linux/ip.h>
48 #include <linux/in.h>
49
50 #include <net/dst.h>
51
52 MODULE_AUTHOR("Roland Dreier");
53 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
54 MODULE_LICENSE("Dual BSD/GPL");
55
56 int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE;
57 int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE;
58
59 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
60 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
61 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
62 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
63
64 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
65 int ipoib_debug_level;
66
67 module_param_named(debug_level, ipoib_debug_level, int, 0644);
68 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
69 #endif
70
71 struct ipoib_path_iter {
72 struct net_device *dev;
73 struct ipoib_path path;
74 };
75
76 static const u8 ipv4_bcast_addr[] = {
77 0x00, 0xff, 0xff, 0xff,
78 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
79 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
80 };
81
82 struct workqueue_struct *ipoib_workqueue;
83
84 struct ib_sa_client ipoib_sa_client;
85
86 static void ipoib_add_one(struct ib_device *device);
87 static void ipoib_remove_one(struct ib_device *device);
88
89 static struct ib_client ipoib_client = {
90 .name = "ipoib",
91 .add = ipoib_add_one,
92 .remove = ipoib_remove_one
93 };
94
95 int ipoib_open(struct net_device *dev)
96 {
97 struct ipoib_dev_priv *priv = netdev_priv(dev);
98
99 ipoib_dbg(priv, "bringing up interface\n");
100
101 napi_enable(&priv->napi);
102 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
103
104 if (ipoib_pkey_dev_delay_open(dev))
105 return 0;
106
107 if (ipoib_ib_dev_open(dev)) {
108 napi_disable(&priv->napi);
109 return -EINVAL;
110 }
111
112 if (ipoib_ib_dev_up(dev)) {
113 ipoib_ib_dev_stop(dev, 1);
114 napi_disable(&priv->napi);
115 return -EINVAL;
116 }
117
118 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
119 struct ipoib_dev_priv *cpriv;
120
121 /* Bring up any child interfaces too */
122 mutex_lock(&priv->vlan_mutex);
123 list_for_each_entry(cpriv, &priv->child_intfs, list) {
124 int flags;
125
126 flags = cpriv->dev->flags;
127 if (flags & IFF_UP)
128 continue;
129
130 dev_change_flags(cpriv->dev, flags | IFF_UP);
131 }
132 mutex_unlock(&priv->vlan_mutex);
133 }
134
135 netif_start_queue(dev);
136
137 return 0;
138 }
139
140 static int ipoib_stop(struct net_device *dev)
141 {
142 struct ipoib_dev_priv *priv = netdev_priv(dev);
143
144 ipoib_dbg(priv, "stopping interface\n");
145
146 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
147 napi_disable(&priv->napi);
148
149 netif_stop_queue(dev);
150
151 /*
152 * Now flush workqueue to make sure a scheduled task doesn't
153 * bring our internal state back up.
154 */
155 flush_workqueue(ipoib_workqueue);
156
157 ipoib_ib_dev_down(dev, 1);
158 ipoib_ib_dev_stop(dev, 1);
159
160 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
161 struct ipoib_dev_priv *cpriv;
162
163 /* Bring down any child interfaces too */
164 mutex_lock(&priv->vlan_mutex);
165 list_for_each_entry(cpriv, &priv->child_intfs, list) {
166 int flags;
167
168 flags = cpriv->dev->flags;
169 if (!(flags & IFF_UP))
170 continue;
171
172 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
173 }
174 mutex_unlock(&priv->vlan_mutex);
175 }
176
177 return 0;
178 }
179
180 static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
181 {
182 struct ipoib_dev_priv *priv = netdev_priv(dev);
183
184 /* dev->mtu > 2K ==> connected mode */
185 if (ipoib_cm_admin_enabled(dev) && new_mtu <= IPOIB_CM_MTU) {
186 if (new_mtu > priv->mcast_mtu)
187 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
188 priv->mcast_mtu);
189 dev->mtu = new_mtu;
190 return 0;
191 }
192
193 if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) {
194 return -EINVAL;
195 }
196
197 priv->admin_mtu = new_mtu;
198
199 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
200
201 return 0;
202 }
203
204 static struct ipoib_path *__path_find(struct net_device *dev, void *gid)
205 {
206 struct ipoib_dev_priv *priv = netdev_priv(dev);
207 struct rb_node *n = priv->path_tree.rb_node;
208 struct ipoib_path *path;
209 int ret;
210
211 while (n) {
212 path = rb_entry(n, struct ipoib_path, rb_node);
213
214 ret = memcmp(gid, path->pathrec.dgid.raw,
215 sizeof (union ib_gid));
216
217 if (ret < 0)
218 n = n->rb_left;
219 else if (ret > 0)
220 n = n->rb_right;
221 else
222 return path;
223 }
224
225 return NULL;
226 }
227
228 static int __path_add(struct net_device *dev, struct ipoib_path *path)
229 {
230 struct ipoib_dev_priv *priv = netdev_priv(dev);
231 struct rb_node **n = &priv->path_tree.rb_node;
232 struct rb_node *pn = NULL;
233 struct ipoib_path *tpath;
234 int ret;
235
236 while (*n) {
237 pn = *n;
238 tpath = rb_entry(pn, struct ipoib_path, rb_node);
239
240 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
241 sizeof (union ib_gid));
242 if (ret < 0)
243 n = &pn->rb_left;
244 else if (ret > 0)
245 n = &pn->rb_right;
246 else
247 return -EEXIST;
248 }
249
250 rb_link_node(&path->rb_node, pn, n);
251 rb_insert_color(&path->rb_node, &priv->path_tree);
252
253 list_add_tail(&path->list, &priv->path_list);
254
255 return 0;
256 }
257
258 static void path_free(struct net_device *dev, struct ipoib_path *path)
259 {
260 struct ipoib_dev_priv *priv = netdev_priv(dev);
261 struct ipoib_neigh *neigh, *tn;
262 struct sk_buff *skb;
263 unsigned long flags;
264
265 while ((skb = __skb_dequeue(&path->queue)))
266 dev_kfree_skb_irq(skb);
267
268 spin_lock_irqsave(&priv->lock, flags);
269
270 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
271 /*
272 * It's safe to call ipoib_put_ah() inside priv->lock
273 * here, because we know that path->ah will always
274 * hold one more reference, so ipoib_put_ah() will
275 * never do more than decrement the ref count.
276 */
277 if (neigh->ah)
278 ipoib_put_ah(neigh->ah);
279
280 ipoib_neigh_free(dev, neigh);
281 }
282
283 spin_unlock_irqrestore(&priv->lock, flags);
284
285 if (path->ah)
286 ipoib_put_ah(path->ah);
287
288 kfree(path);
289 }
290
291 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
292
293 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
294 {
295 struct ipoib_path_iter *iter;
296
297 iter = kmalloc(sizeof *iter, GFP_KERNEL);
298 if (!iter)
299 return NULL;
300
301 iter->dev = dev;
302 memset(iter->path.pathrec.dgid.raw, 0, 16);
303
304 if (ipoib_path_iter_next(iter)) {
305 kfree(iter);
306 return NULL;
307 }
308
309 return iter;
310 }
311
312 int ipoib_path_iter_next(struct ipoib_path_iter *iter)
313 {
314 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
315 struct rb_node *n;
316 struct ipoib_path *path;
317 int ret = 1;
318
319 spin_lock_irq(&priv->lock);
320
321 n = rb_first(&priv->path_tree);
322
323 while (n) {
324 path = rb_entry(n, struct ipoib_path, rb_node);
325
326 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
327 sizeof (union ib_gid)) < 0) {
328 iter->path = *path;
329 ret = 0;
330 break;
331 }
332
333 n = rb_next(n);
334 }
335
336 spin_unlock_irq(&priv->lock);
337
338 return ret;
339 }
340
341 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
342 struct ipoib_path *path)
343 {
344 *path = iter->path;
345 }
346
347 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
348
349 void ipoib_flush_paths(struct net_device *dev)
350 {
351 struct ipoib_dev_priv *priv = netdev_priv(dev);
352 struct ipoib_path *path, *tp;
353 LIST_HEAD(remove_list);
354
355 spin_lock_irq(&priv->tx_lock);
356 spin_lock(&priv->lock);
357
358 list_splice(&priv->path_list, &remove_list);
359 INIT_LIST_HEAD(&priv->path_list);
360
361 list_for_each_entry(path, &remove_list, list)
362 rb_erase(&path->rb_node, &priv->path_tree);
363
364 list_for_each_entry_safe(path, tp, &remove_list, list) {
365 if (path->query)
366 ib_sa_cancel_query(path->query_id, path->query);
367 spin_unlock(&priv->lock);
368 spin_unlock_irq(&priv->tx_lock);
369 wait_for_completion(&path->done);
370 path_free(dev, path);
371 spin_lock_irq(&priv->tx_lock);
372 spin_lock(&priv->lock);
373 }
374 spin_unlock(&priv->lock);
375 spin_unlock_irq(&priv->tx_lock);
376 }
377
378 static void path_rec_completion(int status,
379 struct ib_sa_path_rec *pathrec,
380 void *path_ptr)
381 {
382 struct ipoib_path *path = path_ptr;
383 struct net_device *dev = path->dev;
384 struct ipoib_dev_priv *priv = netdev_priv(dev);
385 struct ipoib_ah *ah = NULL;
386 struct ipoib_neigh *neigh, *tn;
387 struct sk_buff_head skqueue;
388 struct sk_buff *skb;
389 unsigned long flags;
390
391 if (!status)
392 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
393 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
394 else
395 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
396 status, IPOIB_GID_ARG(path->pathrec.dgid));
397
398 skb_queue_head_init(&skqueue);
399
400 if (!status) {
401 struct ib_ah_attr av;
402
403 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
404 ah = ipoib_create_ah(dev, priv->pd, &av);
405 }
406
407 spin_lock_irqsave(&priv->lock, flags);
408
409 path->ah = ah;
410
411 if (ah) {
412 path->pathrec = *pathrec;
413
414 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
415 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
416
417 while ((skb = __skb_dequeue(&path->queue)))
418 __skb_queue_tail(&skqueue, skb);
419
420 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
421 kref_get(&path->ah->ref);
422 neigh->ah = path->ah;
423 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
424 sizeof(union ib_gid));
425
426 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
427 if (!ipoib_cm_get(neigh))
428 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
429 path,
430 neigh));
431 if (!ipoib_cm_get(neigh)) {
432 list_del(&neigh->list);
433 if (neigh->ah)
434 ipoib_put_ah(neigh->ah);
435 ipoib_neigh_free(dev, neigh);
436 continue;
437 }
438 }
439
440 while ((skb = __skb_dequeue(&neigh->queue)))
441 __skb_queue_tail(&skqueue, skb);
442 }
443 }
444
445 path->query = NULL;
446 complete(&path->done);
447
448 spin_unlock_irqrestore(&priv->lock, flags);
449
450 while ((skb = __skb_dequeue(&skqueue))) {
451 skb->dev = dev;
452 if (dev_queue_xmit(skb))
453 ipoib_warn(priv, "dev_queue_xmit failed "
454 "to requeue packet\n");
455 }
456 }
457
458 static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
459 {
460 struct ipoib_dev_priv *priv = netdev_priv(dev);
461 struct ipoib_path *path;
462
463 path = kzalloc(sizeof *path, GFP_ATOMIC);
464 if (!path)
465 return NULL;
466
467 path->dev = dev;
468
469 skb_queue_head_init(&path->queue);
470
471 INIT_LIST_HEAD(&path->neigh_list);
472
473 memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid));
474 path->pathrec.sgid = priv->local_gid;
475 path->pathrec.pkey = cpu_to_be16(priv->pkey);
476 path->pathrec.numb_path = 1;
477 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
478
479 return path;
480 }
481
482 static int path_rec_start(struct net_device *dev,
483 struct ipoib_path *path)
484 {
485 struct ipoib_dev_priv *priv = netdev_priv(dev);
486
487 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
488 IPOIB_GID_ARG(path->pathrec.dgid));
489
490 init_completion(&path->done);
491
492 path->query_id =
493 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
494 &path->pathrec,
495 IB_SA_PATH_REC_DGID |
496 IB_SA_PATH_REC_SGID |
497 IB_SA_PATH_REC_NUMB_PATH |
498 IB_SA_PATH_REC_TRAFFIC_CLASS |
499 IB_SA_PATH_REC_PKEY,
500 1000, GFP_ATOMIC,
501 path_rec_completion,
502 path, &path->query);
503 if (path->query_id < 0) {
504 ipoib_warn(priv, "ib_sa_path_rec_get failed\n");
505 path->query = NULL;
506 return path->query_id;
507 }
508
509 return 0;
510 }
511
512 static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
513 {
514 struct ipoib_dev_priv *priv = netdev_priv(dev);
515 struct ipoib_path *path;
516 struct ipoib_neigh *neigh;
517
518 neigh = ipoib_neigh_alloc(skb->dst->neighbour);
519 if (!neigh) {
520 ++dev->stats.tx_dropped;
521 dev_kfree_skb_any(skb);
522 return;
523 }
524
525 /*
526 * We can only be called from ipoib_start_xmit, so we're
527 * inside tx_lock -- no need to save/restore flags.
528 */
529 spin_lock(&priv->lock);
530
531 path = __path_find(dev, skb->dst->neighbour->ha + 4);
532 if (!path) {
533 path = path_rec_create(dev, skb->dst->neighbour->ha + 4);
534 if (!path)
535 goto err_path;
536
537 __path_add(dev, path);
538 }
539
540 list_add_tail(&neigh->list, &path->neigh_list);
541
542 if (path->ah) {
543 kref_get(&path->ah->ref);
544 neigh->ah = path->ah;
545 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
546 sizeof(union ib_gid));
547
548 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
549 if (!ipoib_cm_get(neigh))
550 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
551 if (!ipoib_cm_get(neigh)) {
552 list_del(&neigh->list);
553 if (neigh->ah)
554 ipoib_put_ah(neigh->ah);
555 ipoib_neigh_free(dev, neigh);
556 goto err_drop;
557 }
558 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
559 __skb_queue_tail(&neigh->queue, skb);
560 else {
561 ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
562 skb_queue_len(&neigh->queue));
563 goto err_drop;
564 }
565 } else
566 ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha));
567 } else {
568 neigh->ah = NULL;
569
570 if (!path->query && path_rec_start(dev, path))
571 goto err_list;
572
573 __skb_queue_tail(&neigh->queue, skb);
574 }
575
576 spin_unlock(&priv->lock);
577 return;
578
579 err_list:
580 list_del(&neigh->list);
581
582 err_path:
583 ipoib_neigh_free(dev, neigh);
584 err_drop:
585 ++dev->stats.tx_dropped;
586 dev_kfree_skb_any(skb);
587
588 spin_unlock(&priv->lock);
589 }
590
591 static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
592 {
593 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
594
595 /* Look up path record for unicasts */
596 if (skb->dst->neighbour->ha[4] != 0xff) {
597 neigh_add_path(skb, dev);
598 return;
599 }
600
601 /* Add in the P_Key for multicasts */
602 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
603 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
604 ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb);
605 }
606
607 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
608 struct ipoib_pseudoheader *phdr)
609 {
610 struct ipoib_dev_priv *priv = netdev_priv(dev);
611 struct ipoib_path *path;
612
613 /*
614 * We can only be called from ipoib_start_xmit, so we're
615 * inside tx_lock -- no need to save/restore flags.
616 */
617 spin_lock(&priv->lock);
618
619 path = __path_find(dev, phdr->hwaddr + 4);
620 if (!path) {
621 path = path_rec_create(dev, phdr->hwaddr + 4);
622 if (path) {
623 /* put pseudoheader back on for next time */
624 skb_push(skb, sizeof *phdr);
625 __skb_queue_tail(&path->queue, skb);
626
627 if (path_rec_start(dev, path)) {
628 spin_unlock(&priv->lock);
629 path_free(dev, path);
630 return;
631 } else
632 __path_add(dev, path);
633 } else {
634 ++dev->stats.tx_dropped;
635 dev_kfree_skb_any(skb);
636 }
637
638 spin_unlock(&priv->lock);
639 return;
640 }
641
642 if (path->ah) {
643 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
644 be16_to_cpu(path->pathrec.dlid));
645
646 ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr));
647 } else if ((path->query || !path_rec_start(dev, path)) &&
648 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
649 /* put pseudoheader back on for next time */
650 skb_push(skb, sizeof *phdr);
651 __skb_queue_tail(&path->queue, skb);
652 } else {
653 ++dev->stats.tx_dropped;
654 dev_kfree_skb_any(skb);
655 }
656
657 spin_unlock(&priv->lock);
658 }
659
660 static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
661 {
662 struct ipoib_dev_priv *priv = netdev_priv(dev);
663 struct ipoib_neigh *neigh;
664 unsigned long flags;
665
666 if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags)))
667 return NETDEV_TX_LOCKED;
668
669 /*
670 * Check if our queue is stopped. Since we have the LLTX bit
671 * set, we can't rely on netif_stop_queue() preventing our
672 * xmit function from being called with a full queue.
673 */
674 if (unlikely(netif_queue_stopped(dev))) {
675 spin_unlock_irqrestore(&priv->tx_lock, flags);
676 return NETDEV_TX_BUSY;
677 }
678
679 if (likely(skb->dst && skb->dst->neighbour)) {
680 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
681 ipoib_path_lookup(skb, dev);
682 goto out;
683 }
684
685 neigh = *to_ipoib_neigh(skb->dst->neighbour);
686
687 if (ipoib_cm_get(neigh)) {
688 if (ipoib_cm_up(neigh)) {
689 ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
690 goto out;
691 }
692 } else if (neigh->ah) {
693 if (unlikely(memcmp(&neigh->dgid.raw,
694 skb->dst->neighbour->ha + 4,
695 sizeof(union ib_gid)))) {
696 spin_lock(&priv->lock);
697 /*
698 * It's safe to call ipoib_put_ah() inside
699 * priv->lock here, because we know that
700 * path->ah will always hold one more reference,
701 * so ipoib_put_ah() will never do more than
702 * decrement the ref count.
703 */
704 ipoib_put_ah(neigh->ah);
705 list_del(&neigh->list);
706 ipoib_neigh_free(dev, neigh);
707 spin_unlock(&priv->lock);
708 ipoib_path_lookup(skb, dev);
709 goto out;
710 }
711
712 ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha));
713 goto out;
714 }
715
716 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
717 spin_lock(&priv->lock);
718 __skb_queue_tail(&neigh->queue, skb);
719 spin_unlock(&priv->lock);
720 } else {
721 ++dev->stats.tx_dropped;
722 dev_kfree_skb_any(skb);
723 }
724 } else {
725 struct ipoib_pseudoheader *phdr =
726 (struct ipoib_pseudoheader *) skb->data;
727 skb_pull(skb, sizeof *phdr);
728
729 if (phdr->hwaddr[4] == 0xff) {
730 /* Add in the P_Key for multicast*/
731 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
732 phdr->hwaddr[9] = priv->pkey & 0xff;
733
734 ipoib_mcast_send(dev, phdr->hwaddr + 4, skb);
735 } else {
736 /* unicast GID -- should be ARP or RARP reply */
737
738 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
739 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
740 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
741 IPOIB_GID_FMT "\n",
742 skb->dst ? "neigh" : "dst",
743 be16_to_cpup((__be16 *) skb->data),
744 IPOIB_QPN(phdr->hwaddr),
745 IPOIB_GID_RAW_ARG(phdr->hwaddr + 4));
746 dev_kfree_skb_any(skb);
747 ++dev->stats.tx_dropped;
748 goto out;
749 }
750
751 unicast_arp_send(skb, dev, phdr);
752 }
753 }
754
755 out:
756 spin_unlock_irqrestore(&priv->tx_lock, flags);
757
758 return NETDEV_TX_OK;
759 }
760
761 static void ipoib_timeout(struct net_device *dev)
762 {
763 struct ipoib_dev_priv *priv = netdev_priv(dev);
764
765 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
766 jiffies_to_msecs(jiffies - dev->trans_start));
767 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
768 netif_queue_stopped(dev),
769 priv->tx_head, priv->tx_tail);
770 /* XXX reset QP, etc. */
771 }
772
773 static int ipoib_hard_header(struct sk_buff *skb,
774 struct net_device *dev,
775 unsigned short type,
776 const void *daddr, const void *saddr, unsigned len)
777 {
778 struct ipoib_header *header;
779
780 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
781
782 header->proto = htons(type);
783 header->reserved = 0;
784
785 /*
786 * If we don't have a neighbour structure, stuff the
787 * destination address onto the front of the skb so we can
788 * figure out where to send the packet later.
789 */
790 if ((!skb->dst || !skb->dst->neighbour) && daddr) {
791 struct ipoib_pseudoheader *phdr =
792 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
793 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
794 }
795
796 return 0;
797 }
798
799 static void ipoib_set_mcast_list(struct net_device *dev)
800 {
801 struct ipoib_dev_priv *priv = netdev_priv(dev);
802
803 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
804 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
805 return;
806 }
807
808 queue_work(ipoib_workqueue, &priv->restart_task);
809 }
810
811 static void ipoib_neigh_cleanup(struct neighbour *n)
812 {
813 struct ipoib_neigh *neigh;
814 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
815 unsigned long flags;
816 struct ipoib_ah *ah = NULL;
817
818 ipoib_dbg(priv,
819 "neigh_cleanup for %06x " IPOIB_GID_FMT "\n",
820 IPOIB_QPN(n->ha),
821 IPOIB_GID_RAW_ARG(n->ha + 4));
822
823 spin_lock_irqsave(&priv->lock, flags);
824
825 neigh = *to_ipoib_neigh(n);
826 if (neigh) {
827 if (neigh->ah)
828 ah = neigh->ah;
829 list_del(&neigh->list);
830 ipoib_neigh_free(n->dev, neigh);
831 }
832
833 spin_unlock_irqrestore(&priv->lock, flags);
834
835 if (ah)
836 ipoib_put_ah(ah);
837 }
838
839 struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour)
840 {
841 struct ipoib_neigh *neigh;
842
843 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
844 if (!neigh)
845 return NULL;
846
847 neigh->neighbour = neighbour;
848 *to_ipoib_neigh(neighbour) = neigh;
849 skb_queue_head_init(&neigh->queue);
850 ipoib_cm_set(neigh, NULL);
851
852 return neigh;
853 }
854
855 void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
856 {
857 struct sk_buff *skb;
858 *to_ipoib_neigh(neigh->neighbour) = NULL;
859 while ((skb = __skb_dequeue(&neigh->queue))) {
860 ++dev->stats.tx_dropped;
861 dev_kfree_skb_any(skb);
862 }
863 if (ipoib_cm_get(neigh))
864 ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
865 kfree(neigh);
866 }
867
868 static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
869 {
870 parms->neigh_cleanup = ipoib_neigh_cleanup;
871
872 return 0;
873 }
874
875 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
876 {
877 struct ipoib_dev_priv *priv = netdev_priv(dev);
878
879 /* Allocate RX/TX "rings" to hold queued skbs */
880 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
881 GFP_KERNEL);
882 if (!priv->rx_ring) {
883 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
884 ca->name, ipoib_recvq_size);
885 goto out;
886 }
887
888 priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring,
889 GFP_KERNEL);
890 if (!priv->tx_ring) {
891 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
892 ca->name, ipoib_sendq_size);
893 goto out_rx_ring_cleanup;
894 }
895
896 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
897
898 if (ipoib_ib_dev_init(dev, ca, port))
899 goto out_tx_ring_cleanup;
900
901 return 0;
902
903 out_tx_ring_cleanup:
904 kfree(priv->tx_ring);
905
906 out_rx_ring_cleanup:
907 kfree(priv->rx_ring);
908
909 out:
910 return -ENOMEM;
911 }
912
913 void ipoib_dev_cleanup(struct net_device *dev)
914 {
915 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
916
917 ipoib_delete_debug_files(dev);
918
919 /* Delete any child interfaces first */
920 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
921 unregister_netdev(cpriv->dev);
922 ipoib_dev_cleanup(cpriv->dev);
923 free_netdev(cpriv->dev);
924 }
925
926 ipoib_ib_dev_cleanup(dev);
927
928 kfree(priv->rx_ring);
929 kfree(priv->tx_ring);
930
931 priv->rx_ring = NULL;
932 priv->tx_ring = NULL;
933 }
934
935 static const struct header_ops ipoib_header_ops = {
936 .create = ipoib_hard_header,
937 };
938
939 static void ipoib_setup(struct net_device *dev)
940 {
941 struct ipoib_dev_priv *priv = netdev_priv(dev);
942
943 dev->open = ipoib_open;
944 dev->stop = ipoib_stop;
945 dev->change_mtu = ipoib_change_mtu;
946 dev->hard_start_xmit = ipoib_start_xmit;
947 dev->tx_timeout = ipoib_timeout;
948 dev->header_ops = &ipoib_header_ops;
949 dev->set_multicast_list = ipoib_set_mcast_list;
950 dev->neigh_setup = ipoib_neigh_setup_dev;
951
952 netif_napi_add(dev, &priv->napi, ipoib_poll, 100);
953
954 dev->watchdog_timeo = HZ;
955
956 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
957
958 /*
959 * We add in INFINIBAND_ALEN to allow for the destination
960 * address "pseudoheader" for skbs without neighbour struct.
961 */
962 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
963 dev->addr_len = INFINIBAND_ALEN;
964 dev->type = ARPHRD_INFINIBAND;
965 dev->tx_queue_len = ipoib_sendq_size * 2;
966 dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
967
968 /* MTU will be reset when mcast join happens */
969 dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN;
970 priv->mcast_mtu = priv->admin_mtu = dev->mtu;
971
972 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
973
974 netif_carrier_off(dev);
975
976 priv->dev = dev;
977
978 spin_lock_init(&priv->lock);
979 spin_lock_init(&priv->tx_lock);
980
981 mutex_init(&priv->mcast_mutex);
982 mutex_init(&priv->vlan_mutex);
983
984 INIT_LIST_HEAD(&priv->path_list);
985 INIT_LIST_HEAD(&priv->child_intfs);
986 INIT_LIST_HEAD(&priv->dead_ahs);
987 INIT_LIST_HEAD(&priv->multicast_list);
988
989 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
990 INIT_WORK(&priv->pkey_event_task, ipoib_pkey_event);
991 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
992 INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush);
993 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
994 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
995 }
996
997 struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
998 {
999 struct net_device *dev;
1000
1001 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
1002 ipoib_setup);
1003 if (!dev)
1004 return NULL;
1005
1006 return netdev_priv(dev);
1007 }
1008
1009 static ssize_t show_pkey(struct device *dev,
1010 struct device_attribute *attr, char *buf)
1011 {
1012 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1013
1014 return sprintf(buf, "0x%04x\n", priv->pkey);
1015 }
1016 static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
1017
1018 static ssize_t show_umcast(struct device *dev,
1019 struct device_attribute *attr, char *buf)
1020 {
1021 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1022
1023 return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
1024 }
1025
1026 static ssize_t set_umcast(struct device *dev,
1027 struct device_attribute *attr,
1028 const char *buf, size_t count)
1029 {
1030 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1031 unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
1032
1033 if (umcast_val > 0) {
1034 set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1035 ipoib_warn(priv, "ignoring multicast groups joined directly "
1036 "by userspace\n");
1037 } else
1038 clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1039
1040 return count;
1041 }
1042 static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
1043
1044 int ipoib_add_umcast_attr(struct net_device *dev)
1045 {
1046 return device_create_file(&dev->dev, &dev_attr_umcast);
1047 }
1048
1049 static ssize_t create_child(struct device *dev,
1050 struct device_attribute *attr,
1051 const char *buf, size_t count)
1052 {
1053 int pkey;
1054 int ret;
1055
1056 if (sscanf(buf, "%i", &pkey) != 1)
1057 return -EINVAL;
1058
1059 if (pkey < 0 || pkey > 0xffff)
1060 return -EINVAL;
1061
1062 /*
1063 * Set the full membership bit, so that we join the right
1064 * broadcast group, etc.
1065 */
1066 pkey |= 0x8000;
1067
1068 ret = ipoib_vlan_add(to_net_dev(dev), pkey);
1069
1070 return ret ? ret : count;
1071 }
1072 static DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
1073
1074 static ssize_t delete_child(struct device *dev,
1075 struct device_attribute *attr,
1076 const char *buf, size_t count)
1077 {
1078 int pkey;
1079 int ret;
1080
1081 if (sscanf(buf, "%i", &pkey) != 1)
1082 return -EINVAL;
1083
1084 if (pkey < 0 || pkey > 0xffff)
1085 return -EINVAL;
1086
1087 ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
1088
1089 return ret ? ret : count;
1090
1091 }
1092 static DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
1093
1094 int ipoib_add_pkey_attr(struct net_device *dev)
1095 {
1096 return device_create_file(&dev->dev, &dev_attr_pkey);
1097 }
1098
1099 static struct net_device *ipoib_add_port(const char *format,
1100 struct ib_device *hca, u8 port)
1101 {
1102 struct ipoib_dev_priv *priv;
1103 int result = -ENOMEM;
1104
1105 priv = ipoib_intf_alloc(format);
1106 if (!priv)
1107 goto alloc_mem_failed;
1108
1109 SET_NETDEV_DEV(priv->dev, hca->dma_device);
1110
1111 result = ib_query_pkey(hca, port, 0, &priv->pkey);
1112 if (result) {
1113 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
1114 hca->name, port, result);
1115 goto device_init_failed;
1116 }
1117
1118 /*
1119 * Set the full membership bit, so that we join the right
1120 * broadcast group, etc.
1121 */
1122 priv->pkey |= 0x8000;
1123
1124 priv->dev->broadcast[8] = priv->pkey >> 8;
1125 priv->dev->broadcast[9] = priv->pkey & 0xff;
1126
1127 result = ib_query_gid(hca, port, 0, &priv->local_gid);
1128 if (result) {
1129 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1130 hca->name, port, result);
1131 goto device_init_failed;
1132 } else
1133 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
1134
1135
1136 result = ipoib_dev_init(priv->dev, hca, port);
1137 if (result < 0) {
1138 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1139 hca->name, port, result);
1140 goto device_init_failed;
1141 }
1142
1143 INIT_IB_EVENT_HANDLER(&priv->event_handler,
1144 priv->ca, ipoib_event);
1145 result = ib_register_event_handler(&priv->event_handler);
1146 if (result < 0) {
1147 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1148 "port %d (ret = %d)\n",
1149 hca->name, port, result);
1150 goto event_failed;
1151 }
1152
1153 result = register_netdev(priv->dev);
1154 if (result) {
1155 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1156 hca->name, port, result);
1157 goto register_failed;
1158 }
1159
1160 ipoib_create_debug_files(priv->dev);
1161
1162 if (ipoib_cm_add_mode_attr(priv->dev))
1163 goto sysfs_failed;
1164 if (ipoib_add_pkey_attr(priv->dev))
1165 goto sysfs_failed;
1166 if (ipoib_add_umcast_attr(priv->dev))
1167 goto sysfs_failed;
1168 if (device_create_file(&priv->dev->dev, &dev_attr_create_child))
1169 goto sysfs_failed;
1170 if (device_create_file(&priv->dev->dev, &dev_attr_delete_child))
1171 goto sysfs_failed;
1172
1173 return priv->dev;
1174
1175 sysfs_failed:
1176 ipoib_delete_debug_files(priv->dev);
1177 unregister_netdev(priv->dev);
1178
1179 register_failed:
1180 ib_unregister_event_handler(&priv->event_handler);
1181 flush_scheduled_work();
1182
1183 event_failed:
1184 ipoib_dev_cleanup(priv->dev);
1185
1186 device_init_failed:
1187 free_netdev(priv->dev);
1188
1189 alloc_mem_failed:
1190 return ERR_PTR(result);
1191 }
1192
1193 static void ipoib_add_one(struct ib_device *device)
1194 {
1195 struct list_head *dev_list;
1196 struct net_device *dev;
1197 struct ipoib_dev_priv *priv;
1198 int s, e, p;
1199
1200 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1201 return;
1202
1203 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1204 if (!dev_list)
1205 return;
1206
1207 INIT_LIST_HEAD(dev_list);
1208
1209 if (device->node_type == RDMA_NODE_IB_SWITCH) {
1210 s = 0;
1211 e = 0;
1212 } else {
1213 s = 1;
1214 e = device->phys_port_cnt;
1215 }
1216
1217 for (p = s; p <= e; ++p) {
1218 dev = ipoib_add_port("ib%d", device, p);
1219 if (!IS_ERR(dev)) {
1220 priv = netdev_priv(dev);
1221 list_add_tail(&priv->list, dev_list);
1222 }
1223 }
1224
1225 ib_set_client_data(device, &ipoib_client, dev_list);
1226 }
1227
1228 static void ipoib_remove_one(struct ib_device *device)
1229 {
1230 struct ipoib_dev_priv *priv, *tmp;
1231 struct list_head *dev_list;
1232
1233 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1234 return;
1235
1236 dev_list = ib_get_client_data(device, &ipoib_client);
1237
1238 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1239 ib_unregister_event_handler(&priv->event_handler);
1240 flush_scheduled_work();
1241
1242 unregister_netdev(priv->dev);
1243 ipoib_dev_cleanup(priv->dev);
1244 free_netdev(priv->dev);
1245 }
1246
1247 kfree(dev_list);
1248 }
1249
1250 static int __init ipoib_init_module(void)
1251 {
1252 int ret;
1253
1254 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1255 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1256 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1257
1258 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1259 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1260 ipoib_sendq_size = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE);
1261
1262 ret = ipoib_register_debugfs();
1263 if (ret)
1264 return ret;
1265
1266 /*
1267 * We create our own workqueue mainly because we want to be
1268 * able to flush it when devices are being removed. We can't
1269 * use schedule_work()/flush_scheduled_work() because both
1270 * unregister_netdev() and linkwatch_event take the rtnl lock,
1271 * so flush_scheduled_work() can deadlock during device
1272 * removal.
1273 */
1274 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1275 if (!ipoib_workqueue) {
1276 ret = -ENOMEM;
1277 goto err_fs;
1278 }
1279
1280 ib_sa_register_client(&ipoib_sa_client);
1281
1282 ret = ib_register_client(&ipoib_client);
1283 if (ret)
1284 goto err_sa;
1285
1286 return 0;
1287
1288 err_sa:
1289 ib_sa_unregister_client(&ipoib_sa_client);
1290 destroy_workqueue(ipoib_workqueue);
1291
1292 err_fs:
1293 ipoib_unregister_debugfs();
1294
1295 return ret;
1296 }
1297
1298 static void __exit ipoib_cleanup_module(void)
1299 {
1300 ib_unregister_client(&ipoib_client);
1301 ib_sa_unregister_client(&ipoib_sa_client);
1302 ipoib_unregister_debugfs();
1303 destroy_workqueue(ipoib_workqueue);
1304 }
1305
1306 module_init(ipoib_init_module);
1307 module_exit(ipoib_cleanup_module);
Verdex Pro support