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Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / ulp / ipoib / ipoib_main.c
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
35 #include "ipoib.h"
36
37 #include <linux/module.h>
38
39 #include <linux/init.h>
40 #include <linux/slab.h>
41 #include <linux/kernel.h>
42 #include <linux/vmalloc.h>
43
44 #include <linux/if_arp.h> /* For ARPHRD_xxx */
45
46 #include <linux/ip.h>
47 #include <linux/in.h>
48
49 #include <net/dst.h>
50
51 MODULE_AUTHOR("Roland Dreier");
52 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
53 MODULE_LICENSE("Dual BSD/GPL");
54
55 int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE;
56 int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE;
57
58 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
59 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
60 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
61 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
62
63 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
64 int ipoib_debug_level;
65
66 module_param_named(debug_level, ipoib_debug_level, int, 0644);
67 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
68 #endif
69
70 struct ipoib_path_iter {
71 struct net_device *dev;
72 struct ipoib_path path;
73 };
74
75 static const u8 ipv4_bcast_addr[] = {
76 0x00, 0xff, 0xff, 0xff,
77 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
78 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
79 };
80
81 struct workqueue_struct *ipoib_workqueue;
82
83 struct ib_sa_client ipoib_sa_client;
84
85 static void ipoib_add_one(struct ib_device *device);
86 static void ipoib_remove_one(struct ib_device *device);
87
88 static struct ib_client ipoib_client = {
89 .name = "ipoib",
90 .add = ipoib_add_one,
91 .remove = ipoib_remove_one
92 };
93
94 int ipoib_open(struct net_device *dev)
95 {
96 struct ipoib_dev_priv *priv = netdev_priv(dev);
97
98 ipoib_dbg(priv, "bringing up interface\n");
99
100 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
101
102 if (ipoib_pkey_dev_delay_open(dev))
103 return 0;
104
105 if (ipoib_ib_dev_open(dev))
106 goto err_disable;
107
108 if (ipoib_ib_dev_up(dev))
109 goto err_stop;
110
111 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
112 struct ipoib_dev_priv *cpriv;
113
114 /* Bring up any child interfaces too */
115 mutex_lock(&priv->vlan_mutex);
116 list_for_each_entry(cpriv, &priv->child_intfs, list) {
117 int flags;
118
119 flags = cpriv->dev->flags;
120 if (flags & IFF_UP)
121 continue;
122
123 dev_change_flags(cpriv->dev, flags | IFF_UP);
124 }
125 mutex_unlock(&priv->vlan_mutex);
126 }
127
128 netif_start_queue(dev);
129
130 return 0;
131
132 err_stop:
133 ipoib_ib_dev_stop(dev, 1);
134
135 err_disable:
136 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
137
138 return -EINVAL;
139 }
140
141 static int ipoib_stop(struct net_device *dev)
142 {
143 struct ipoib_dev_priv *priv = netdev_priv(dev);
144
145 ipoib_dbg(priv, "stopping interface\n");
146
147 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
148
149 netif_stop_queue(dev);
150
151 ipoib_ib_dev_down(dev, 0);
152 ipoib_ib_dev_stop(dev, 0);
153
154 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
155 struct ipoib_dev_priv *cpriv;
156
157 /* Bring down any child interfaces too */
158 mutex_lock(&priv->vlan_mutex);
159 list_for_each_entry(cpriv, &priv->child_intfs, list) {
160 int flags;
161
162 flags = cpriv->dev->flags;
163 if (!(flags & IFF_UP))
164 continue;
165
166 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
167 }
168 mutex_unlock(&priv->vlan_mutex);
169 }
170
171 return 0;
172 }
173
174 static u32 ipoib_fix_features(struct net_device *dev, u32 features)
175 {
176 struct ipoib_dev_priv *priv = netdev_priv(dev);
177
178 if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags))
179 features &= ~(NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
180
181 return features;
182 }
183
184 static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
185 {
186 struct ipoib_dev_priv *priv = netdev_priv(dev);
187
188 /* dev->mtu > 2K ==> connected mode */
189 if (ipoib_cm_admin_enabled(dev)) {
190 if (new_mtu > ipoib_cm_max_mtu(dev))
191 return -EINVAL;
192
193 if (new_mtu > priv->mcast_mtu)
194 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
195 priv->mcast_mtu);
196
197 dev->mtu = new_mtu;
198 return 0;
199 }
200
201 if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
202 return -EINVAL;
203
204 priv->admin_mtu = new_mtu;
205
206 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
207
208 return 0;
209 }
210
211 static struct ipoib_path *__path_find(struct net_device *dev, void *gid)
212 {
213 struct ipoib_dev_priv *priv = netdev_priv(dev);
214 struct rb_node *n = priv->path_tree.rb_node;
215 struct ipoib_path *path;
216 int ret;
217
218 while (n) {
219 path = rb_entry(n, struct ipoib_path, rb_node);
220
221 ret = memcmp(gid, path->pathrec.dgid.raw,
222 sizeof (union ib_gid));
223
224 if (ret < 0)
225 n = n->rb_left;
226 else if (ret > 0)
227 n = n->rb_right;
228 else
229 return path;
230 }
231
232 return NULL;
233 }
234
235 static int __path_add(struct net_device *dev, struct ipoib_path *path)
236 {
237 struct ipoib_dev_priv *priv = netdev_priv(dev);
238 struct rb_node **n = &priv->path_tree.rb_node;
239 struct rb_node *pn = NULL;
240 struct ipoib_path *tpath;
241 int ret;
242
243 while (*n) {
244 pn = *n;
245 tpath = rb_entry(pn, struct ipoib_path, rb_node);
246
247 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
248 sizeof (union ib_gid));
249 if (ret < 0)
250 n = &pn->rb_left;
251 else if (ret > 0)
252 n = &pn->rb_right;
253 else
254 return -EEXIST;
255 }
256
257 rb_link_node(&path->rb_node, pn, n);
258 rb_insert_color(&path->rb_node, &priv->path_tree);
259
260 list_add_tail(&path->list, &priv->path_list);
261
262 return 0;
263 }
264
265 static void path_free(struct net_device *dev, struct ipoib_path *path)
266 {
267 struct ipoib_dev_priv *priv = netdev_priv(dev);
268 struct ipoib_neigh *neigh, *tn;
269 struct sk_buff *skb;
270 unsigned long flags;
271
272 while ((skb = __skb_dequeue(&path->queue)))
273 dev_kfree_skb_irq(skb);
274
275 spin_lock_irqsave(&priv->lock, flags);
276
277 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
278 /*
279 * It's safe to call ipoib_put_ah() inside priv->lock
280 * here, because we know that path->ah will always
281 * hold one more reference, so ipoib_put_ah() will
282 * never do more than decrement the ref count.
283 */
284 if (neigh->ah)
285 ipoib_put_ah(neigh->ah);
286
287 ipoib_neigh_free(dev, neigh);
288 }
289
290 spin_unlock_irqrestore(&priv->lock, flags);
291
292 if (path->ah)
293 ipoib_put_ah(path->ah);
294
295 kfree(path);
296 }
297
298 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
299
300 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
301 {
302 struct ipoib_path_iter *iter;
303
304 iter = kmalloc(sizeof *iter, GFP_KERNEL);
305 if (!iter)
306 return NULL;
307
308 iter->dev = dev;
309 memset(iter->path.pathrec.dgid.raw, 0, 16);
310
311 if (ipoib_path_iter_next(iter)) {
312 kfree(iter);
313 return NULL;
314 }
315
316 return iter;
317 }
318
319 int ipoib_path_iter_next(struct ipoib_path_iter *iter)
320 {
321 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
322 struct rb_node *n;
323 struct ipoib_path *path;
324 int ret = 1;
325
326 spin_lock_irq(&priv->lock);
327
328 n = rb_first(&priv->path_tree);
329
330 while (n) {
331 path = rb_entry(n, struct ipoib_path, rb_node);
332
333 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
334 sizeof (union ib_gid)) < 0) {
335 iter->path = *path;
336 ret = 0;
337 break;
338 }
339
340 n = rb_next(n);
341 }
342
343 spin_unlock_irq(&priv->lock);
344
345 return ret;
346 }
347
348 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
349 struct ipoib_path *path)
350 {
351 *path = iter->path;
352 }
353
354 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
355
356 void ipoib_mark_paths_invalid(struct net_device *dev)
357 {
358 struct ipoib_dev_priv *priv = netdev_priv(dev);
359 struct ipoib_path *path, *tp;
360
361 spin_lock_irq(&priv->lock);
362
363 list_for_each_entry_safe(path, tp, &priv->path_list, list) {
364 ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n",
365 be16_to_cpu(path->pathrec.dlid),
366 path->pathrec.dgid.raw);
367 path->valid = 0;
368 }
369
370 spin_unlock_irq(&priv->lock);
371 }
372
373 void ipoib_flush_paths(struct net_device *dev)
374 {
375 struct ipoib_dev_priv *priv = netdev_priv(dev);
376 struct ipoib_path *path, *tp;
377 LIST_HEAD(remove_list);
378 unsigned long flags;
379
380 netif_tx_lock_bh(dev);
381 spin_lock_irqsave(&priv->lock, flags);
382
383 list_splice_init(&priv->path_list, &remove_list);
384
385 list_for_each_entry(path, &remove_list, list)
386 rb_erase(&path->rb_node, &priv->path_tree);
387
388 list_for_each_entry_safe(path, tp, &remove_list, list) {
389 if (path->query)
390 ib_sa_cancel_query(path->query_id, path->query);
391 spin_unlock_irqrestore(&priv->lock, flags);
392 netif_tx_unlock_bh(dev);
393 wait_for_completion(&path->done);
394 path_free(dev, path);
395 netif_tx_lock_bh(dev);
396 spin_lock_irqsave(&priv->lock, flags);
397 }
398
399 spin_unlock_irqrestore(&priv->lock, flags);
400 netif_tx_unlock_bh(dev);
401 }
402
403 static void path_rec_completion(int status,
404 struct ib_sa_path_rec *pathrec,
405 void *path_ptr)
406 {
407 struct ipoib_path *path = path_ptr;
408 struct net_device *dev = path->dev;
409 struct ipoib_dev_priv *priv = netdev_priv(dev);
410 struct ipoib_ah *ah = NULL;
411 struct ipoib_ah *old_ah = NULL;
412 struct ipoib_neigh *neigh, *tn;
413 struct sk_buff_head skqueue;
414 struct sk_buff *skb;
415 unsigned long flags;
416
417 if (!status)
418 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n",
419 be16_to_cpu(pathrec->dlid), pathrec->dgid.raw);
420 else
421 ipoib_dbg(priv, "PathRec status %d for GID %pI6\n",
422 status, path->pathrec.dgid.raw);
423
424 skb_queue_head_init(&skqueue);
425
426 if (!status) {
427 struct ib_ah_attr av;
428
429 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
430 ah = ipoib_create_ah(dev, priv->pd, &av);
431 }
432
433 spin_lock_irqsave(&priv->lock, flags);
434
435 if (!IS_ERR_OR_NULL(ah)) {
436 path->pathrec = *pathrec;
437
438 old_ah = path->ah;
439 path->ah = ah;
440
441 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
442 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
443
444 while ((skb = __skb_dequeue(&path->queue)))
445 __skb_queue_tail(&skqueue, skb);
446
447 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
448 if (neigh->ah) {
449 WARN_ON(neigh->ah != old_ah);
450 /*
451 * Dropping the ah reference inside
452 * priv->lock is safe here, because we
453 * will hold one more reference from
454 * the original value of path->ah (ie
455 * old_ah).
456 */
457 ipoib_put_ah(neigh->ah);
458 }
459 kref_get(&path->ah->ref);
460 neigh->ah = path->ah;
461 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
462 sizeof(union ib_gid));
463
464 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
465 if (!ipoib_cm_get(neigh))
466 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
467 path,
468 neigh));
469 if (!ipoib_cm_get(neigh)) {
470 list_del(&neigh->list);
471 if (neigh->ah)
472 ipoib_put_ah(neigh->ah);
473 ipoib_neigh_free(dev, neigh);
474 continue;
475 }
476 }
477
478 while ((skb = __skb_dequeue(&neigh->queue)))
479 __skb_queue_tail(&skqueue, skb);
480 }
481 path->valid = 1;
482 }
483
484 path->query = NULL;
485 complete(&path->done);
486
487 spin_unlock_irqrestore(&priv->lock, flags);
488
489 if (old_ah)
490 ipoib_put_ah(old_ah);
491
492 while ((skb = __skb_dequeue(&skqueue))) {
493 skb->dev = dev;
494 if (dev_queue_xmit(skb))
495 ipoib_warn(priv, "dev_queue_xmit failed "
496 "to requeue packet\n");
497 }
498 }
499
500 static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
501 {
502 struct ipoib_dev_priv *priv = netdev_priv(dev);
503 struct ipoib_path *path;
504
505 if (!priv->broadcast)
506 return NULL;
507
508 path = kzalloc(sizeof *path, GFP_ATOMIC);
509 if (!path)
510 return NULL;
511
512 path->dev = dev;
513
514 skb_queue_head_init(&path->queue);
515
516 INIT_LIST_HEAD(&path->neigh_list);
517
518 memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid));
519 path->pathrec.sgid = priv->local_gid;
520 path->pathrec.pkey = cpu_to_be16(priv->pkey);
521 path->pathrec.numb_path = 1;
522 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
523
524 return path;
525 }
526
527 static int path_rec_start(struct net_device *dev,
528 struct ipoib_path *path)
529 {
530 struct ipoib_dev_priv *priv = netdev_priv(dev);
531
532 ipoib_dbg(priv, "Start path record lookup for %pI6\n",
533 path->pathrec.dgid.raw);
534
535 init_completion(&path->done);
536
537 path->query_id =
538 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
539 &path->pathrec,
540 IB_SA_PATH_REC_DGID |
541 IB_SA_PATH_REC_SGID |
542 IB_SA_PATH_REC_NUMB_PATH |
543 IB_SA_PATH_REC_TRAFFIC_CLASS |
544 IB_SA_PATH_REC_PKEY,
545 1000, GFP_ATOMIC,
546 path_rec_completion,
547 path, &path->query);
548 if (path->query_id < 0) {
549 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
550 path->query = NULL;
551 complete(&path->done);
552 return path->query_id;
553 }
554
555 return 0;
556 }
557
558 /* called with rcu_read_lock */
559 static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
560 {
561 struct ipoib_dev_priv *priv = netdev_priv(dev);
562 struct ipoib_path *path;
563 struct ipoib_neigh *neigh;
564 struct neighbour *n;
565 unsigned long flags;
566
567 n = dst_get_neighbour(skb_dst(skb));
568 neigh = ipoib_neigh_alloc(n, skb->dev);
569 if (!neigh) {
570 ++dev->stats.tx_dropped;
571 dev_kfree_skb_any(skb);
572 return;
573 }
574
575 spin_lock_irqsave(&priv->lock, flags);
576
577 path = __path_find(dev, n->ha + 4);
578 if (!path) {
579 path = path_rec_create(dev, n->ha + 4);
580 if (!path)
581 goto err_path;
582
583 __path_add(dev, path);
584 }
585
586 list_add_tail(&neigh->list, &path->neigh_list);
587
588 if (path->ah) {
589 kref_get(&path->ah->ref);
590 neigh->ah = path->ah;
591 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
592 sizeof(union ib_gid));
593
594 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
595 if (!ipoib_cm_get(neigh))
596 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
597 if (!ipoib_cm_get(neigh)) {
598 list_del(&neigh->list);
599 if (neigh->ah)
600 ipoib_put_ah(neigh->ah);
601 ipoib_neigh_free(dev, neigh);
602 goto err_drop;
603 }
604 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
605 __skb_queue_tail(&neigh->queue, skb);
606 else {
607 ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
608 skb_queue_len(&neigh->queue));
609 goto err_drop;
610 }
611 } else {
612 spin_unlock_irqrestore(&priv->lock, flags);
613 ipoib_send(dev, skb, path->ah, IPOIB_QPN(n->ha));
614 return;
615 }
616 } else {
617 neigh->ah = NULL;
618
619 if (!path->query && path_rec_start(dev, path))
620 goto err_list;
621
622 __skb_queue_tail(&neigh->queue, skb);
623 }
624
625 spin_unlock_irqrestore(&priv->lock, flags);
626 return;
627
628 err_list:
629 list_del(&neigh->list);
630
631 err_path:
632 ipoib_neigh_free(dev, neigh);
633 err_drop:
634 ++dev->stats.tx_dropped;
635 dev_kfree_skb_any(skb);
636
637 spin_unlock_irqrestore(&priv->lock, flags);
638 }
639
640 /* called with rcu_read_lock */
641 static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
642 {
643 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
644 struct dst_entry *dst = skb_dst(skb);
645 struct neighbour *n;
646
647 /* Look up path record for unicasts */
648 n = dst_get_neighbour(dst);
649 if (n->ha[4] != 0xff) {
650 neigh_add_path(skb, dev);
651 return;
652 }
653
654 /* Add in the P_Key for multicasts */
655 n->ha[8] = (priv->pkey >> 8) & 0xff;
656 n->ha[9] = priv->pkey & 0xff;
657 ipoib_mcast_send(dev, n->ha + 4, skb);
658 }
659
660 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
661 struct ipoib_pseudoheader *phdr)
662 {
663 struct ipoib_dev_priv *priv = netdev_priv(dev);
664 struct ipoib_path *path;
665 unsigned long flags;
666
667 spin_lock_irqsave(&priv->lock, flags);
668
669 path = __path_find(dev, phdr->hwaddr + 4);
670 if (!path || !path->valid) {
671 int new_path = 0;
672
673 if (!path) {
674 path = path_rec_create(dev, phdr->hwaddr + 4);
675 new_path = 1;
676 }
677 if (path) {
678 /* put pseudoheader back on for next time */
679 skb_push(skb, sizeof *phdr);
680 __skb_queue_tail(&path->queue, skb);
681
682 if (!path->query && path_rec_start(dev, path)) {
683 spin_unlock_irqrestore(&priv->lock, flags);
684 if (new_path)
685 path_free(dev, path);
686 return;
687 } else
688 __path_add(dev, path);
689 } else {
690 ++dev->stats.tx_dropped;
691 dev_kfree_skb_any(skb);
692 }
693
694 spin_unlock_irqrestore(&priv->lock, flags);
695 return;
696 }
697
698 if (path->ah) {
699 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
700 be16_to_cpu(path->pathrec.dlid));
701
702 spin_unlock_irqrestore(&priv->lock, flags);
703 ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr));
704 return;
705 } else if ((path->query || !path_rec_start(dev, path)) &&
706 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
707 /* put pseudoheader back on for next time */
708 skb_push(skb, sizeof *phdr);
709 __skb_queue_tail(&path->queue, skb);
710 } else {
711 ++dev->stats.tx_dropped;
712 dev_kfree_skb_any(skb);
713 }
714
715 spin_unlock_irqrestore(&priv->lock, flags);
716 }
717
718 static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
719 {
720 struct ipoib_dev_priv *priv = netdev_priv(dev);
721 struct ipoib_neigh *neigh;
722 struct neighbour *n = NULL;
723 unsigned long flags;
724
725 rcu_read_lock();
726 if (likely(skb_dst(skb)))
727 n = dst_get_neighbour(skb_dst(skb));
728
729 if (likely(n)) {
730 if (unlikely(!*to_ipoib_neigh(n))) {
731 ipoib_path_lookup(skb, dev);
732 goto unlock;
733 }
734
735 neigh = *to_ipoib_neigh(n);
736
737 if (unlikely((memcmp(&neigh->dgid.raw,
738 n->ha + 4,
739 sizeof(union ib_gid))) ||
740 (neigh->dev != dev))) {
741 spin_lock_irqsave(&priv->lock, flags);
742 /*
743 * It's safe to call ipoib_put_ah() inside
744 * priv->lock here, because we know that
745 * path->ah will always hold one more reference,
746 * so ipoib_put_ah() will never do more than
747 * decrement the ref count.
748 */
749 if (neigh->ah)
750 ipoib_put_ah(neigh->ah);
751 list_del(&neigh->list);
752 ipoib_neigh_free(dev, neigh);
753 spin_unlock_irqrestore(&priv->lock, flags);
754 ipoib_path_lookup(skb, dev);
755 goto unlock;
756 }
757
758 if (ipoib_cm_get(neigh)) {
759 if (ipoib_cm_up(neigh)) {
760 ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
761 goto unlock;
762 }
763 } else if (neigh->ah) {
764 ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(n->ha));
765 goto unlock;
766 }
767
768 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
769 spin_lock_irqsave(&priv->lock, flags);
770 __skb_queue_tail(&neigh->queue, skb);
771 spin_unlock_irqrestore(&priv->lock, flags);
772 } else {
773 ++dev->stats.tx_dropped;
774 dev_kfree_skb_any(skb);
775 }
776 } else {
777 struct ipoib_pseudoheader *phdr =
778 (struct ipoib_pseudoheader *) skb->data;
779 skb_pull(skb, sizeof *phdr);
780
781 if (phdr->hwaddr[4] == 0xff) {
782 /* Add in the P_Key for multicast*/
783 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
784 phdr->hwaddr[9] = priv->pkey & 0xff;
785
786 ipoib_mcast_send(dev, phdr->hwaddr + 4, skb);
787 } else {
788 /* unicast GID -- should be ARP or RARP reply */
789
790 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
791 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
792 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x %pI6\n",
793 skb_dst(skb) ? "neigh" : "dst",
794 be16_to_cpup((__be16 *) skb->data),
795 IPOIB_QPN(phdr->hwaddr),
796 phdr->hwaddr + 4);
797 dev_kfree_skb_any(skb);
798 ++dev->stats.tx_dropped;
799 goto unlock;
800 }
801
802 unicast_arp_send(skb, dev, phdr);
803 }
804 }
805 unlock:
806 rcu_read_unlock();
807 return NETDEV_TX_OK;
808 }
809
810 static void ipoib_timeout(struct net_device *dev)
811 {
812 struct ipoib_dev_priv *priv = netdev_priv(dev);
813
814 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
815 jiffies_to_msecs(jiffies - dev->trans_start));
816 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
817 netif_queue_stopped(dev),
818 priv->tx_head, priv->tx_tail);
819 /* XXX reset QP, etc. */
820 }
821
822 static int ipoib_hard_header(struct sk_buff *skb,
823 struct net_device *dev,
824 unsigned short type,
825 const void *daddr, const void *saddr, unsigned len)
826 {
827 struct ipoib_header *header;
828 struct dst_entry *dst;
829 struct neighbour *n;
830
831 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
832
833 header->proto = htons(type);
834 header->reserved = 0;
835
836 /*
837 * If we don't have a neighbour structure, stuff the
838 * destination address onto the front of the skb so we can
839 * figure out where to send the packet later.
840 */
841 dst = skb_dst(skb);
842 n = NULL;
843 if (dst)
844 n = dst_get_neighbour_raw(dst);
845 if ((!dst || !n) && daddr) {
846 struct ipoib_pseudoheader *phdr =
847 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
848 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
849 }
850
851 return 0;
852 }
853
854 static void ipoib_set_mcast_list(struct net_device *dev)
855 {
856 struct ipoib_dev_priv *priv = netdev_priv(dev);
857
858 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
859 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
860 return;
861 }
862
863 queue_work(ipoib_workqueue, &priv->restart_task);
864 }
865
866 static void ipoib_neigh_cleanup(struct neighbour *n)
867 {
868 struct ipoib_neigh *neigh;
869 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
870 unsigned long flags;
871 struct ipoib_ah *ah = NULL;
872
873 neigh = *to_ipoib_neigh(n);
874 if (neigh)
875 priv = netdev_priv(neigh->dev);
876 else
877 return;
878 ipoib_dbg(priv,
879 "neigh_cleanup for %06x %pI6\n",
880 IPOIB_QPN(n->ha),
881 n->ha + 4);
882
883 spin_lock_irqsave(&priv->lock, flags);
884
885 if (neigh->ah)
886 ah = neigh->ah;
887 list_del(&neigh->list);
888 ipoib_neigh_free(n->dev, neigh);
889
890 spin_unlock_irqrestore(&priv->lock, flags);
891
892 if (ah)
893 ipoib_put_ah(ah);
894 }
895
896 struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour,
897 struct net_device *dev)
898 {
899 struct ipoib_neigh *neigh;
900
901 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
902 if (!neigh)
903 return NULL;
904
905 neigh->neighbour = neighbour;
906 neigh->dev = dev;
907 memset(&neigh->dgid.raw, 0, sizeof (union ib_gid));
908 *to_ipoib_neigh(neighbour) = neigh;
909 skb_queue_head_init(&neigh->queue);
910 ipoib_cm_set(neigh, NULL);
911
912 return neigh;
913 }
914
915 void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
916 {
917 struct sk_buff *skb;
918 *to_ipoib_neigh(neigh->neighbour) = NULL;
919 while ((skb = __skb_dequeue(&neigh->queue))) {
920 ++dev->stats.tx_dropped;
921 dev_kfree_skb_any(skb);
922 }
923 if (ipoib_cm_get(neigh))
924 ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
925 kfree(neigh);
926 }
927
928 static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
929 {
930 parms->neigh_cleanup = ipoib_neigh_cleanup;
931
932 return 0;
933 }
934
935 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
936 {
937 struct ipoib_dev_priv *priv = netdev_priv(dev);
938
939 /* Allocate RX/TX "rings" to hold queued skbs */
940 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
941 GFP_KERNEL);
942 if (!priv->rx_ring) {
943 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
944 ca->name, ipoib_recvq_size);
945 goto out;
946 }
947
948 priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
949 if (!priv->tx_ring) {
950 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
951 ca->name, ipoib_sendq_size);
952 goto out_rx_ring_cleanup;
953 }
954
955 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
956
957 if (ipoib_ib_dev_init(dev, ca, port))
958 goto out_tx_ring_cleanup;
959
960 return 0;
961
962 out_tx_ring_cleanup:
963 vfree(priv->tx_ring);
964
965 out_rx_ring_cleanup:
966 kfree(priv->rx_ring);
967
968 out:
969 return -ENOMEM;
970 }
971
972 void ipoib_dev_cleanup(struct net_device *dev)
973 {
974 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
975
976 ipoib_delete_debug_files(dev);
977
978 /* Delete any child interfaces first */
979 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
980 unregister_netdev(cpriv->dev);
981 ipoib_dev_cleanup(cpriv->dev);
982 free_netdev(cpriv->dev);
983 }
984
985 ipoib_ib_dev_cleanup(dev);
986
987 kfree(priv->rx_ring);
988 vfree(priv->tx_ring);
989
990 priv->rx_ring = NULL;
991 priv->tx_ring = NULL;
992 }
993
994 static const struct header_ops ipoib_header_ops = {
995 .create = ipoib_hard_header,
996 };
997
998 static const struct net_device_ops ipoib_netdev_ops = {
999 .ndo_open = ipoib_open,
1000 .ndo_stop = ipoib_stop,
1001 .ndo_change_mtu = ipoib_change_mtu,
1002 .ndo_fix_features = ipoib_fix_features,
1003 .ndo_start_xmit = ipoib_start_xmit,
1004 .ndo_tx_timeout = ipoib_timeout,
1005 .ndo_set_rx_mode = ipoib_set_mcast_list,
1006 .ndo_neigh_setup = ipoib_neigh_setup_dev,
1007 };
1008
1009 static void ipoib_setup(struct net_device *dev)
1010 {
1011 struct ipoib_dev_priv *priv = netdev_priv(dev);
1012
1013 dev->netdev_ops = &ipoib_netdev_ops;
1014 dev->header_ops = &ipoib_header_ops;
1015
1016 ipoib_set_ethtool_ops(dev);
1017
1018 netif_napi_add(dev, &priv->napi, ipoib_poll, 100);
1019
1020 dev->watchdog_timeo = HZ;
1021
1022 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1023
1024 /*
1025 * We add in INFINIBAND_ALEN to allow for the destination
1026 * address "pseudoheader" for skbs without neighbour struct.
1027 */
1028 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
1029 dev->addr_len = INFINIBAND_ALEN;
1030 dev->type = ARPHRD_INFINIBAND;
1031 dev->tx_queue_len = ipoib_sendq_size * 2;
1032 dev->features = (NETIF_F_VLAN_CHALLENGED |
1033 NETIF_F_HIGHDMA);
1034 dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1035
1036 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
1037
1038 netif_carrier_off(dev);
1039
1040 priv->dev = dev;
1041
1042 spin_lock_init(&priv->lock);
1043
1044 mutex_init(&priv->vlan_mutex);
1045
1046 INIT_LIST_HEAD(&priv->path_list);
1047 INIT_LIST_HEAD(&priv->child_intfs);
1048 INIT_LIST_HEAD(&priv->dead_ahs);
1049 INIT_LIST_HEAD(&priv->multicast_list);
1050
1051 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
1052 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
1053 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
1054 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light);
1055 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal);
1056 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
1057 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
1058 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
1059 }
1060
1061 struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
1062 {
1063 struct net_device *dev;
1064
1065 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
1066 ipoib_setup);
1067 if (!dev)
1068 return NULL;
1069
1070 return netdev_priv(dev);
1071 }
1072
1073 static ssize_t show_pkey(struct device *dev,
1074 struct device_attribute *attr, char *buf)
1075 {
1076 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1077
1078 return sprintf(buf, "0x%04x\n", priv->pkey);
1079 }
1080 static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
1081
1082 static ssize_t show_umcast(struct device *dev,
1083 struct device_attribute *attr, char *buf)
1084 {
1085 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1086
1087 return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
1088 }
1089
1090 static ssize_t set_umcast(struct device *dev,
1091 struct device_attribute *attr,
1092 const char *buf, size_t count)
1093 {
1094 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1095 unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
1096
1097 if (umcast_val > 0) {
1098 set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1099 ipoib_warn(priv, "ignoring multicast groups joined directly "
1100 "by userspace\n");
1101 } else
1102 clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1103
1104 return count;
1105 }
1106 static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
1107
1108 int ipoib_add_umcast_attr(struct net_device *dev)
1109 {
1110 return device_create_file(&dev->dev, &dev_attr_umcast);
1111 }
1112
1113 static ssize_t create_child(struct device *dev,
1114 struct device_attribute *attr,
1115 const char *buf, size_t count)
1116 {
1117 int pkey;
1118 int ret;
1119
1120 if (sscanf(buf, "%i", &pkey) != 1)
1121 return -EINVAL;
1122
1123 if (pkey < 0 || pkey > 0xffff)
1124 return -EINVAL;
1125
1126 /*
1127 * Set the full membership bit, so that we join the right
1128 * broadcast group, etc.
1129 */
1130 pkey |= 0x8000;
1131
1132 ret = ipoib_vlan_add(to_net_dev(dev), pkey);
1133
1134 return ret ? ret : count;
1135 }
1136 static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child);
1137
1138 static ssize_t delete_child(struct device *dev,
1139 struct device_attribute *attr,
1140 const char *buf, size_t count)
1141 {
1142 int pkey;
1143 int ret;
1144
1145 if (sscanf(buf, "%i", &pkey) != 1)
1146 return -EINVAL;
1147
1148 if (pkey < 0 || pkey > 0xffff)
1149 return -EINVAL;
1150
1151 ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
1152
1153 return ret ? ret : count;
1154
1155 }
1156 static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child);
1157
1158 int ipoib_add_pkey_attr(struct net_device *dev)
1159 {
1160 return device_create_file(&dev->dev, &dev_attr_pkey);
1161 }
1162
1163 int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
1164 {
1165 struct ib_device_attr *device_attr;
1166 int result = -ENOMEM;
1167
1168 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
1169 if (!device_attr) {
1170 printk(KERN_WARNING "%s: allocation of %zu bytes failed\n",
1171 hca->name, sizeof *device_attr);
1172 return result;
1173 }
1174
1175 result = ib_query_device(hca, device_attr);
1176 if (result) {
1177 printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n",
1178 hca->name, result);
1179 kfree(device_attr);
1180 return result;
1181 }
1182 priv->hca_caps = device_attr->device_cap_flags;
1183
1184 kfree(device_attr);
1185
1186 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
1187 priv->dev->hw_features = NETIF_F_SG |
1188 NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1189
1190 if (priv->hca_caps & IB_DEVICE_UD_TSO)
1191 priv->dev->hw_features |= NETIF_F_TSO;
1192
1193 priv->dev->features |= priv->dev->hw_features;
1194 }
1195
1196 return 0;
1197 }
1198
1199 static struct net_device *ipoib_add_port(const char *format,
1200 struct ib_device *hca, u8 port)
1201 {
1202 struct ipoib_dev_priv *priv;
1203 struct ib_port_attr attr;
1204 int result = -ENOMEM;
1205
1206 priv = ipoib_intf_alloc(format);
1207 if (!priv)
1208 goto alloc_mem_failed;
1209
1210 SET_NETDEV_DEV(priv->dev, hca->dma_device);
1211 priv->dev->dev_id = port - 1;
1212
1213 if (!ib_query_port(hca, port, &attr))
1214 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
1215 else {
1216 printk(KERN_WARNING "%s: ib_query_port %d failed\n",
1217 hca->name, port);
1218 goto device_init_failed;
1219 }
1220
1221 /* MTU will be reset when mcast join happens */
1222 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
1223 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu;
1224
1225 result = ib_query_pkey(hca, port, 0, &priv->pkey);
1226 if (result) {
1227 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
1228 hca->name, port, result);
1229 goto device_init_failed;
1230 }
1231
1232 if (ipoib_set_dev_features(priv, hca))
1233 goto device_init_failed;
1234
1235 /*
1236 * Set the full membership bit, so that we join the right
1237 * broadcast group, etc.
1238 */
1239 priv->pkey |= 0x8000;
1240
1241 priv->dev->broadcast[8] = priv->pkey >> 8;
1242 priv->dev->broadcast[9] = priv->pkey & 0xff;
1243
1244 result = ib_query_gid(hca, port, 0, &priv->local_gid);
1245 if (result) {
1246 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1247 hca->name, port, result);
1248 goto device_init_failed;
1249 } else
1250 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
1251
1252 result = ipoib_dev_init(priv->dev, hca, port);
1253 if (result < 0) {
1254 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1255 hca->name, port, result);
1256 goto device_init_failed;
1257 }
1258
1259 INIT_IB_EVENT_HANDLER(&priv->event_handler,
1260 priv->ca, ipoib_event);
1261 result = ib_register_event_handler(&priv->event_handler);
1262 if (result < 0) {
1263 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1264 "port %d (ret = %d)\n",
1265 hca->name, port, result);
1266 goto event_failed;
1267 }
1268
1269 result = register_netdev(priv->dev);
1270 if (result) {
1271 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1272 hca->name, port, result);
1273 goto register_failed;
1274 }
1275
1276 ipoib_create_debug_files(priv->dev);
1277
1278 if (ipoib_cm_add_mode_attr(priv->dev))
1279 goto sysfs_failed;
1280 if (ipoib_add_pkey_attr(priv->dev))
1281 goto sysfs_failed;
1282 if (ipoib_add_umcast_attr(priv->dev))
1283 goto sysfs_failed;
1284 if (device_create_file(&priv->dev->dev, &dev_attr_create_child))
1285 goto sysfs_failed;
1286 if (device_create_file(&priv->dev->dev, &dev_attr_delete_child))
1287 goto sysfs_failed;
1288
1289 return priv->dev;
1290
1291 sysfs_failed:
1292 ipoib_delete_debug_files(priv->dev);
1293 unregister_netdev(priv->dev);
1294
1295 register_failed:
1296 ib_unregister_event_handler(&priv->event_handler);
1297 flush_workqueue(ipoib_workqueue);
1298
1299 event_failed:
1300 ipoib_dev_cleanup(priv->dev);
1301
1302 device_init_failed:
1303 free_netdev(priv->dev);
1304
1305 alloc_mem_failed:
1306 return ERR_PTR(result);
1307 }
1308
1309 static void ipoib_add_one(struct ib_device *device)
1310 {
1311 struct list_head *dev_list;
1312 struct net_device *dev;
1313 struct ipoib_dev_priv *priv;
1314 int s, e, p;
1315
1316 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1317 return;
1318
1319 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1320 if (!dev_list)
1321 return;
1322
1323 INIT_LIST_HEAD(dev_list);
1324
1325 if (device->node_type == RDMA_NODE_IB_SWITCH) {
1326 s = 0;
1327 e = 0;
1328 } else {
1329 s = 1;
1330 e = device->phys_port_cnt;
1331 }
1332
1333 for (p = s; p <= e; ++p) {
1334 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND)
1335 continue;
1336 dev = ipoib_add_port("ib%d", device, p);
1337 if (!IS_ERR(dev)) {
1338 priv = netdev_priv(dev);
1339 list_add_tail(&priv->list, dev_list);
1340 }
1341 }
1342
1343 ib_set_client_data(device, &ipoib_client, dev_list);
1344 }
1345
1346 static void ipoib_remove_one(struct ib_device *device)
1347 {
1348 struct ipoib_dev_priv *priv, *tmp;
1349 struct list_head *dev_list;
1350
1351 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1352 return;
1353
1354 dev_list = ib_get_client_data(device, &ipoib_client);
1355
1356 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1357 ib_unregister_event_handler(&priv->event_handler);
1358
1359 rtnl_lock();
1360 dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP);
1361 rtnl_unlock();
1362
1363 flush_workqueue(ipoib_workqueue);
1364
1365 unregister_netdev(priv->dev);
1366 ipoib_dev_cleanup(priv->dev);
1367 free_netdev(priv->dev);
1368 }
1369
1370 kfree(dev_list);
1371 }
1372
1373 static int __init ipoib_init_module(void)
1374 {
1375 int ret;
1376
1377 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1378 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1379 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1380
1381 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1382 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1383 ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE);
1384 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1385 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
1386 #endif
1387
1388 /*
1389 * When copying small received packets, we only copy from the
1390 * linear data part of the SKB, so we rely on this condition.
1391 */
1392 BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE);
1393
1394 ret = ipoib_register_debugfs();
1395 if (ret)
1396 return ret;
1397
1398 /*
1399 * We create our own workqueue mainly because we want to be
1400 * able to flush it when devices are being removed. We can't
1401 * use schedule_work()/flush_scheduled_work() because both
1402 * unregister_netdev() and linkwatch_event take the rtnl lock,
1403 * so flush_scheduled_work() can deadlock during device
1404 * removal.
1405 */
1406 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1407 if (!ipoib_workqueue) {
1408 ret = -ENOMEM;
1409 goto err_fs;
1410 }
1411
1412 ib_sa_register_client(&ipoib_sa_client);
1413
1414 ret = ib_register_client(&ipoib_client);
1415 if (ret)
1416 goto err_sa;
1417
1418 return 0;
1419
1420 err_sa:
1421 ib_sa_unregister_client(&ipoib_sa_client);
1422 destroy_workqueue(ipoib_workqueue);
1423
1424 err_fs:
1425 ipoib_unregister_debugfs();
1426
1427 return ret;
1428 }
1429
1430 static void __exit ipoib_cleanup_module(void)
1431 {
1432 ib_unregister_client(&ipoib_client);
1433 ib_sa_unregister_client(&ipoib_sa_client);
1434 ipoib_unregister_debugfs();
1435 destroy_workqueue(ipoib_workqueue);
1436 }
1437
1438 module_init(ipoib_init_module);
1439 module_exit(ipoib_cleanup_module);
kernel source for telekom puls (alcatel/mediatek)