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Merge branches 'topic/asoc', 'topic/misc-fixes' and 'topic/hda' into for-linus
[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 static int lro;
64 module_param(lro, bool, 0444);
65 MODULE_PARM_DESC(lro, "Enable LRO (Large Receive Offload)");
66
67 static int lro_max_aggr = IPOIB_LRO_MAX_AGGR;
68 module_param(lro_max_aggr, int, 0644);
69 MODULE_PARM_DESC(lro_max_aggr, "LRO: Max packets to be aggregated "
70 "(default = 64)");
71
72 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
73 int ipoib_debug_level;
74
75 module_param_named(debug_level, ipoib_debug_level, int, 0644);
76 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
77 #endif
78
79 struct ipoib_path_iter {
80 struct net_device *dev;
81 struct ipoib_path path;
82 };
83
84 static const u8 ipv4_bcast_addr[] = {
85 0x00, 0xff, 0xff, 0xff,
86 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
87 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
88 };
89
90 struct workqueue_struct *ipoib_workqueue;
91
92 struct ib_sa_client ipoib_sa_client;
93
94 static void ipoib_add_one(struct ib_device *device);
95 static void ipoib_remove_one(struct ib_device *device);
96
97 static struct ib_client ipoib_client = {
98 .name = "ipoib",
99 .add = ipoib_add_one,
100 .remove = ipoib_remove_one
101 };
102
103 int ipoib_open(struct net_device *dev)
104 {
105 struct ipoib_dev_priv *priv = netdev_priv(dev);
106
107 ipoib_dbg(priv, "bringing up interface\n");
108
109 napi_enable(&priv->napi);
110 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
111
112 if (ipoib_pkey_dev_delay_open(dev))
113 return 0;
114
115 if (ipoib_ib_dev_open(dev)) {
116 napi_disable(&priv->napi);
117 return -EINVAL;
118 }
119
120 if (ipoib_ib_dev_up(dev)) {
121 ipoib_ib_dev_stop(dev, 1);
122 napi_disable(&priv->napi);
123 return -EINVAL;
124 }
125
126 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
127 struct ipoib_dev_priv *cpriv;
128
129 /* Bring up any child interfaces too */
130 mutex_lock(&priv->vlan_mutex);
131 list_for_each_entry(cpriv, &priv->child_intfs, list) {
132 int flags;
133
134 flags = cpriv->dev->flags;
135 if (flags & IFF_UP)
136 continue;
137
138 dev_change_flags(cpriv->dev, flags | IFF_UP);
139 }
140 mutex_unlock(&priv->vlan_mutex);
141 }
142
143 netif_start_queue(dev);
144
145 return 0;
146 }
147
148 static int ipoib_stop(struct net_device *dev)
149 {
150 struct ipoib_dev_priv *priv = netdev_priv(dev);
151
152 ipoib_dbg(priv, "stopping interface\n");
153
154 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
155 napi_disable(&priv->napi);
156
157 netif_stop_queue(dev);
158
159 ipoib_ib_dev_down(dev, 0);
160 ipoib_ib_dev_stop(dev, 0);
161
162 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
163 struct ipoib_dev_priv *cpriv;
164
165 /* Bring down any child interfaces too */
166 mutex_lock(&priv->vlan_mutex);
167 list_for_each_entry(cpriv, &priv->child_intfs, list) {
168 int flags;
169
170 flags = cpriv->dev->flags;
171 if (!(flags & IFF_UP))
172 continue;
173
174 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
175 }
176 mutex_unlock(&priv->vlan_mutex);
177 }
178
179 return 0;
180 }
181
182 static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
183 {
184 struct ipoib_dev_priv *priv = netdev_priv(dev);
185
186 /* dev->mtu > 2K ==> connected mode */
187 if (ipoib_cm_admin_enabled(dev)) {
188 if (new_mtu > ipoib_cm_max_mtu(dev))
189 return -EINVAL;
190
191 if (new_mtu > priv->mcast_mtu)
192 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
193 priv->mcast_mtu);
194
195 dev->mtu = new_mtu;
196 return 0;
197 }
198
199 if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
200 return -EINVAL;
201
202 priv->admin_mtu = new_mtu;
203
204 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
205
206 return 0;
207 }
208
209 static struct ipoib_path *__path_find(struct net_device *dev, void *gid)
210 {
211 struct ipoib_dev_priv *priv = netdev_priv(dev);
212 struct rb_node *n = priv->path_tree.rb_node;
213 struct ipoib_path *path;
214 int ret;
215
216 while (n) {
217 path = rb_entry(n, struct ipoib_path, rb_node);
218
219 ret = memcmp(gid, path->pathrec.dgid.raw,
220 sizeof (union ib_gid));
221
222 if (ret < 0)
223 n = n->rb_left;
224 else if (ret > 0)
225 n = n->rb_right;
226 else
227 return path;
228 }
229
230 return NULL;
231 }
232
233 static int __path_add(struct net_device *dev, struct ipoib_path *path)
234 {
235 struct ipoib_dev_priv *priv = netdev_priv(dev);
236 struct rb_node **n = &priv->path_tree.rb_node;
237 struct rb_node *pn = NULL;
238 struct ipoib_path *tpath;
239 int ret;
240
241 while (*n) {
242 pn = *n;
243 tpath = rb_entry(pn, struct ipoib_path, rb_node);
244
245 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
246 sizeof (union ib_gid));
247 if (ret < 0)
248 n = &pn->rb_left;
249 else if (ret > 0)
250 n = &pn->rb_right;
251 else
252 return -EEXIST;
253 }
254
255 rb_link_node(&path->rb_node, pn, n);
256 rb_insert_color(&path->rb_node, &priv->path_tree);
257
258 list_add_tail(&path->list, &priv->path_list);
259
260 return 0;
261 }
262
263 static void path_free(struct net_device *dev, struct ipoib_path *path)
264 {
265 struct ipoib_dev_priv *priv = netdev_priv(dev);
266 struct ipoib_neigh *neigh, *tn;
267 struct sk_buff *skb;
268 unsigned long flags;
269
270 while ((skb = __skb_dequeue(&path->queue)))
271 dev_kfree_skb_irq(skb);
272
273 spin_lock_irqsave(&priv->lock, flags);
274
275 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
276 /*
277 * It's safe to call ipoib_put_ah() inside priv->lock
278 * here, because we know that path->ah will always
279 * hold one more reference, so ipoib_put_ah() will
280 * never do more than decrement the ref count.
281 */
282 if (neigh->ah)
283 ipoib_put_ah(neigh->ah);
284
285 ipoib_neigh_free(dev, neigh);
286 }
287
288 spin_unlock_irqrestore(&priv->lock, flags);
289
290 if (path->ah)
291 ipoib_put_ah(path->ah);
292
293 kfree(path);
294 }
295
296 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
297
298 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
299 {
300 struct ipoib_path_iter *iter;
301
302 iter = kmalloc(sizeof *iter, GFP_KERNEL);
303 if (!iter)
304 return NULL;
305
306 iter->dev = dev;
307 memset(iter->path.pathrec.dgid.raw, 0, 16);
308
309 if (ipoib_path_iter_next(iter)) {
310 kfree(iter);
311 return NULL;
312 }
313
314 return iter;
315 }
316
317 int ipoib_path_iter_next(struct ipoib_path_iter *iter)
318 {
319 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
320 struct rb_node *n;
321 struct ipoib_path *path;
322 int ret = 1;
323
324 spin_lock_irq(&priv->lock);
325
326 n = rb_first(&priv->path_tree);
327
328 while (n) {
329 path = rb_entry(n, struct ipoib_path, rb_node);
330
331 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
332 sizeof (union ib_gid)) < 0) {
333 iter->path = *path;
334 ret = 0;
335 break;
336 }
337
338 n = rb_next(n);
339 }
340
341 spin_unlock_irq(&priv->lock);
342
343 return ret;
344 }
345
346 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
347 struct ipoib_path *path)
348 {
349 *path = iter->path;
350 }
351
352 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
353
354 void ipoib_mark_paths_invalid(struct net_device *dev)
355 {
356 struct ipoib_dev_priv *priv = netdev_priv(dev);
357 struct ipoib_path *path, *tp;
358
359 spin_lock_irq(&priv->lock);
360
361 list_for_each_entry_safe(path, tp, &priv->path_list, list) {
362 ipoib_dbg(priv, "mark path LID 0x%04x GID " IPOIB_GID_FMT " invalid\n",
363 be16_to_cpu(path->pathrec.dlid),
364 IPOIB_GID_ARG(path->pathrec.dgid));
365 path->valid = 0;
366 }
367
368 spin_unlock_irq(&priv->lock);
369 }
370
371 void ipoib_flush_paths(struct net_device *dev)
372 {
373 struct ipoib_dev_priv *priv = netdev_priv(dev);
374 struct ipoib_path *path, *tp;
375 LIST_HEAD(remove_list);
376 unsigned long flags;
377
378 netif_tx_lock_bh(dev);
379 spin_lock_irqsave(&priv->lock, flags);
380
381 list_splice_init(&priv->path_list, &remove_list);
382
383 list_for_each_entry(path, &remove_list, list)
384 rb_erase(&path->rb_node, &priv->path_tree);
385
386 list_for_each_entry_safe(path, tp, &remove_list, list) {
387 if (path->query)
388 ib_sa_cancel_query(path->query_id, path->query);
389 spin_unlock_irqrestore(&priv->lock, flags);
390 netif_tx_unlock_bh(dev);
391 wait_for_completion(&path->done);
392 path_free(dev, path);
393 netif_tx_lock_bh(dev);
394 spin_lock_irqsave(&priv->lock, flags);
395 }
396
397 spin_unlock_irqrestore(&priv->lock, flags);
398 netif_tx_unlock_bh(dev);
399 }
400
401 static void path_rec_completion(int status,
402 struct ib_sa_path_rec *pathrec,
403 void *path_ptr)
404 {
405 struct ipoib_path *path = path_ptr;
406 struct net_device *dev = path->dev;
407 struct ipoib_dev_priv *priv = netdev_priv(dev);
408 struct ipoib_ah *ah = NULL;
409 struct ipoib_ah *old_ah = NULL;
410 struct ipoib_neigh *neigh, *tn;
411 struct sk_buff_head skqueue;
412 struct sk_buff *skb;
413 unsigned long flags;
414
415 if (!status)
416 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
417 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
418 else
419 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
420 status, IPOIB_GID_ARG(path->pathrec.dgid));
421
422 skb_queue_head_init(&skqueue);
423
424 if (!status) {
425 struct ib_ah_attr av;
426
427 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
428 ah = ipoib_create_ah(dev, priv->pd, &av);
429 }
430
431 spin_lock_irqsave(&priv->lock, flags);
432
433 if (ah) {
434 path->pathrec = *pathrec;
435
436 old_ah = path->ah;
437 path->ah = ah;
438
439 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
440 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
441
442 while ((skb = __skb_dequeue(&path->queue)))
443 __skb_queue_tail(&skqueue, skb);
444
445 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
446 if (neigh->ah) {
447 WARN_ON(neigh->ah != old_ah);
448 /*
449 * Dropping the ah reference inside
450 * priv->lock is safe here, because we
451 * will hold one more reference from
452 * the original value of path->ah (ie
453 * old_ah).
454 */
455 ipoib_put_ah(neigh->ah);
456 }
457 kref_get(&path->ah->ref);
458 neigh->ah = path->ah;
459 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
460 sizeof(union ib_gid));
461
462 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
463 if (!ipoib_cm_get(neigh))
464 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
465 path,
466 neigh));
467 if (!ipoib_cm_get(neigh)) {
468 list_del(&neigh->list);
469 if (neigh->ah)
470 ipoib_put_ah(neigh->ah);
471 ipoib_neigh_free(dev, neigh);
472 continue;
473 }
474 }
475
476 while ((skb = __skb_dequeue(&neigh->queue)))
477 __skb_queue_tail(&skqueue, skb);
478 }
479 path->valid = 1;
480 }
481
482 path->query = NULL;
483 complete(&path->done);
484
485 spin_unlock_irqrestore(&priv->lock, flags);
486
487 if (old_ah)
488 ipoib_put_ah(old_ah);
489
490 while ((skb = __skb_dequeue(&skqueue))) {
491 skb->dev = dev;
492 if (dev_queue_xmit(skb))
493 ipoib_warn(priv, "dev_queue_xmit failed "
494 "to requeue packet\n");
495 }
496 }
497
498 static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
499 {
500 struct ipoib_dev_priv *priv = netdev_priv(dev);
501 struct ipoib_path *path;
502
503 if (!priv->broadcast)
504 return NULL;
505
506 path = kzalloc(sizeof *path, GFP_ATOMIC);
507 if (!path)
508 return NULL;
509
510 path->dev = dev;
511
512 skb_queue_head_init(&path->queue);
513
514 INIT_LIST_HEAD(&path->neigh_list);
515
516 memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid));
517 path->pathrec.sgid = priv->local_gid;
518 path->pathrec.pkey = cpu_to_be16(priv->pkey);
519 path->pathrec.numb_path = 1;
520 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
521
522 return path;
523 }
524
525 static int path_rec_start(struct net_device *dev,
526 struct ipoib_path *path)
527 {
528 struct ipoib_dev_priv *priv = netdev_priv(dev);
529
530 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
531 IPOIB_GID_ARG(path->pathrec.dgid));
532
533 init_completion(&path->done);
534
535 path->query_id =
536 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
537 &path->pathrec,
538 IB_SA_PATH_REC_DGID |
539 IB_SA_PATH_REC_SGID |
540 IB_SA_PATH_REC_NUMB_PATH |
541 IB_SA_PATH_REC_TRAFFIC_CLASS |
542 IB_SA_PATH_REC_PKEY,
543 1000, GFP_ATOMIC,
544 path_rec_completion,
545 path, &path->query);
546 if (path->query_id < 0) {
547 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
548 path->query = NULL;
549 return path->query_id;
550 }
551
552 return 0;
553 }
554
555 static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
556 {
557 struct ipoib_dev_priv *priv = netdev_priv(dev);
558 struct ipoib_path *path;
559 struct ipoib_neigh *neigh;
560 unsigned long flags;
561
562 neigh = ipoib_neigh_alloc(skb->dst->neighbour, skb->dev);
563 if (!neigh) {
564 ++dev->stats.tx_dropped;
565 dev_kfree_skb_any(skb);
566 return;
567 }
568
569 spin_lock_irqsave(&priv->lock, flags);
570
571 path = __path_find(dev, skb->dst->neighbour->ha + 4);
572 if (!path) {
573 path = path_rec_create(dev, skb->dst->neighbour->ha + 4);
574 if (!path)
575 goto err_path;
576
577 __path_add(dev, path);
578 }
579
580 list_add_tail(&neigh->list, &path->neigh_list);
581
582 if (path->ah) {
583 kref_get(&path->ah->ref);
584 neigh->ah = path->ah;
585 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
586 sizeof(union ib_gid));
587
588 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
589 if (!ipoib_cm_get(neigh))
590 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
591 if (!ipoib_cm_get(neigh)) {
592 list_del(&neigh->list);
593 if (neigh->ah)
594 ipoib_put_ah(neigh->ah);
595 ipoib_neigh_free(dev, neigh);
596 goto err_drop;
597 }
598 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
599 __skb_queue_tail(&neigh->queue, skb);
600 else {
601 ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
602 skb_queue_len(&neigh->queue));
603 goto err_drop;
604 }
605 } else
606 ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha));
607 } else {
608 neigh->ah = NULL;
609
610 if (!path->query && path_rec_start(dev, path))
611 goto err_list;
612
613 __skb_queue_tail(&neigh->queue, skb);
614 }
615
616 spin_unlock_irqrestore(&priv->lock, flags);
617 return;
618
619 err_list:
620 list_del(&neigh->list);
621
622 err_path:
623 ipoib_neigh_free(dev, neigh);
624 err_drop:
625 ++dev->stats.tx_dropped;
626 dev_kfree_skb_any(skb);
627
628 spin_unlock_irqrestore(&priv->lock, flags);
629 }
630
631 static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
632 {
633 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
634
635 /* Look up path record for unicasts */
636 if (skb->dst->neighbour->ha[4] != 0xff) {
637 neigh_add_path(skb, dev);
638 return;
639 }
640
641 /* Add in the P_Key for multicasts */
642 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
643 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
644 ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb);
645 }
646
647 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
648 struct ipoib_pseudoheader *phdr)
649 {
650 struct ipoib_dev_priv *priv = netdev_priv(dev);
651 struct ipoib_path *path;
652 unsigned long flags;
653
654 spin_lock_irqsave(&priv->lock, flags);
655
656 path = __path_find(dev, phdr->hwaddr + 4);
657 if (!path || !path->valid) {
658 if (!path)
659 path = path_rec_create(dev, phdr->hwaddr + 4);
660 if (path) {
661 /* put pseudoheader back on for next time */
662 skb_push(skb, sizeof *phdr);
663 __skb_queue_tail(&path->queue, skb);
664
665 if (path_rec_start(dev, path)) {
666 spin_unlock_irqrestore(&priv->lock, flags);
667 path_free(dev, path);
668 return;
669 } else
670 __path_add(dev, path);
671 } else {
672 ++dev->stats.tx_dropped;
673 dev_kfree_skb_any(skb);
674 }
675
676 spin_unlock_irqrestore(&priv->lock, flags);
677 return;
678 }
679
680 if (path->ah) {
681 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
682 be16_to_cpu(path->pathrec.dlid));
683
684 ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr));
685 } else if ((path->query || !path_rec_start(dev, path)) &&
686 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
687 /* put pseudoheader back on for next time */
688 skb_push(skb, sizeof *phdr);
689 __skb_queue_tail(&path->queue, skb);
690 } else {
691 ++dev->stats.tx_dropped;
692 dev_kfree_skb_any(skb);
693 }
694
695 spin_unlock_irqrestore(&priv->lock, flags);
696 }
697
698 static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
699 {
700 struct ipoib_dev_priv *priv = netdev_priv(dev);
701 struct ipoib_neigh *neigh;
702 unsigned long flags;
703
704 if (likely(skb->dst && skb->dst->neighbour)) {
705 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
706 ipoib_path_lookup(skb, dev);
707 return NETDEV_TX_OK;
708 }
709
710 neigh = *to_ipoib_neigh(skb->dst->neighbour);
711
712 if (neigh->ah)
713 if (unlikely((memcmp(&neigh->dgid.raw,
714 skb->dst->neighbour->ha + 4,
715 sizeof(union ib_gid))) ||
716 (neigh->dev != dev))) {
717 spin_lock_irqsave(&priv->lock, flags);
718 /*
719 * It's safe to call ipoib_put_ah() inside
720 * priv->lock here, because we know that
721 * path->ah will always hold one more reference,
722 * so ipoib_put_ah() will never do more than
723 * decrement the ref count.
724 */
725 ipoib_put_ah(neigh->ah);
726 list_del(&neigh->list);
727 ipoib_neigh_free(dev, neigh);
728 spin_unlock_irqrestore(&priv->lock, flags);
729 ipoib_path_lookup(skb, dev);
730 return NETDEV_TX_OK;
731 }
732
733 if (ipoib_cm_get(neigh)) {
734 if (ipoib_cm_up(neigh)) {
735 ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
736 return NETDEV_TX_OK;
737 }
738 } else if (neigh->ah) {
739 ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha));
740 return NETDEV_TX_OK;
741 }
742
743 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
744 spin_lock_irqsave(&priv->lock, flags);
745 __skb_queue_tail(&neigh->queue, skb);
746 spin_unlock_irqrestore(&priv->lock, flags);
747 } else {
748 ++dev->stats.tx_dropped;
749 dev_kfree_skb_any(skb);
750 }
751 } else {
752 struct ipoib_pseudoheader *phdr =
753 (struct ipoib_pseudoheader *) skb->data;
754 skb_pull(skb, sizeof *phdr);
755
756 if (phdr->hwaddr[4] == 0xff) {
757 /* Add in the P_Key for multicast*/
758 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
759 phdr->hwaddr[9] = priv->pkey & 0xff;
760
761 ipoib_mcast_send(dev, phdr->hwaddr + 4, skb);
762 } else {
763 /* unicast GID -- should be ARP or RARP reply */
764
765 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
766 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
767 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
768 IPOIB_GID_FMT "\n",
769 skb->dst ? "neigh" : "dst",
770 be16_to_cpup((__be16 *) skb->data),
771 IPOIB_QPN(phdr->hwaddr),
772 IPOIB_GID_RAW_ARG(phdr->hwaddr + 4));
773 dev_kfree_skb_any(skb);
774 ++dev->stats.tx_dropped;
775 return NETDEV_TX_OK;
776 }
777
778 unicast_arp_send(skb, dev, phdr);
779 }
780 }
781
782 return NETDEV_TX_OK;
783 }
784
785 static void ipoib_timeout(struct net_device *dev)
786 {
787 struct ipoib_dev_priv *priv = netdev_priv(dev);
788
789 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
790 jiffies_to_msecs(jiffies - dev->trans_start));
791 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
792 netif_queue_stopped(dev),
793 priv->tx_head, priv->tx_tail);
794 /* XXX reset QP, etc. */
795 }
796
797 static int ipoib_hard_header(struct sk_buff *skb,
798 struct net_device *dev,
799 unsigned short type,
800 const void *daddr, const void *saddr, unsigned len)
801 {
802 struct ipoib_header *header;
803
804 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
805
806 header->proto = htons(type);
807 header->reserved = 0;
808
809 /*
810 * If we don't have a neighbour structure, stuff the
811 * destination address onto the front of the skb so we can
812 * figure out where to send the packet later.
813 */
814 if ((!skb->dst || !skb->dst->neighbour) && daddr) {
815 struct ipoib_pseudoheader *phdr =
816 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
817 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
818 }
819
820 return 0;
821 }
822
823 static void ipoib_set_mcast_list(struct net_device *dev)
824 {
825 struct ipoib_dev_priv *priv = netdev_priv(dev);
826
827 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
828 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
829 return;
830 }
831
832 queue_work(ipoib_workqueue, &priv->restart_task);
833 }
834
835 static void ipoib_neigh_cleanup(struct neighbour *n)
836 {
837 struct ipoib_neigh *neigh;
838 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
839 unsigned long flags;
840 struct ipoib_ah *ah = NULL;
841
842 neigh = *to_ipoib_neigh(n);
843 if (neigh)
844 priv = netdev_priv(neigh->dev);
845 else
846 return;
847 ipoib_dbg(priv,
848 "neigh_cleanup for %06x " IPOIB_GID_FMT "\n",
849 IPOIB_QPN(n->ha),
850 IPOIB_GID_RAW_ARG(n->ha + 4));
851
852 spin_lock_irqsave(&priv->lock, flags);
853
854 if (neigh->ah)
855 ah = neigh->ah;
856 list_del(&neigh->list);
857 ipoib_neigh_free(n->dev, neigh);
858
859 spin_unlock_irqrestore(&priv->lock, flags);
860
861 if (ah)
862 ipoib_put_ah(ah);
863 }
864
865 struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour,
866 struct net_device *dev)
867 {
868 struct ipoib_neigh *neigh;
869
870 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
871 if (!neigh)
872 return NULL;
873
874 neigh->neighbour = neighbour;
875 neigh->dev = dev;
876 *to_ipoib_neigh(neighbour) = neigh;
877 skb_queue_head_init(&neigh->queue);
878 ipoib_cm_set(neigh, NULL);
879
880 return neigh;
881 }
882
883 void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
884 {
885 struct sk_buff *skb;
886 *to_ipoib_neigh(neigh->neighbour) = NULL;
887 while ((skb = __skb_dequeue(&neigh->queue))) {
888 ++dev->stats.tx_dropped;
889 dev_kfree_skb_any(skb);
890 }
891 if (ipoib_cm_get(neigh))
892 ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
893 kfree(neigh);
894 }
895
896 static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
897 {
898 parms->neigh_cleanup = ipoib_neigh_cleanup;
899
900 return 0;
901 }
902
903 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
904 {
905 struct ipoib_dev_priv *priv = netdev_priv(dev);
906
907 /* Allocate RX/TX "rings" to hold queued skbs */
908 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
909 GFP_KERNEL);
910 if (!priv->rx_ring) {
911 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
912 ca->name, ipoib_recvq_size);
913 goto out;
914 }
915
916 priv->tx_ring = vmalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
917 if (!priv->tx_ring) {
918 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
919 ca->name, ipoib_sendq_size);
920 goto out_rx_ring_cleanup;
921 }
922 memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring);
923
924 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
925
926 if (ipoib_ib_dev_init(dev, ca, port))
927 goto out_tx_ring_cleanup;
928
929 return 0;
930
931 out_tx_ring_cleanup:
932 vfree(priv->tx_ring);
933
934 out_rx_ring_cleanup:
935 kfree(priv->rx_ring);
936
937 out:
938 return -ENOMEM;
939 }
940
941 void ipoib_dev_cleanup(struct net_device *dev)
942 {
943 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
944
945 ipoib_delete_debug_files(dev);
946
947 /* Delete any child interfaces first */
948 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
949 unregister_netdev(cpriv->dev);
950 ipoib_dev_cleanup(cpriv->dev);
951 free_netdev(cpriv->dev);
952 }
953
954 ipoib_ib_dev_cleanup(dev);
955
956 kfree(priv->rx_ring);
957 vfree(priv->tx_ring);
958
959 priv->rx_ring = NULL;
960 priv->tx_ring = NULL;
961 }
962
963 static const struct header_ops ipoib_header_ops = {
964 .create = ipoib_hard_header,
965 };
966
967 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
968 void **tcph, u64 *hdr_flags, void *priv)
969 {
970 unsigned int ip_len;
971 struct iphdr *iph;
972
973 if (unlikely(skb->protocol != htons(ETH_P_IP)))
974 return -1;
975
976 /*
977 * In the future we may add an else clause that verifies the
978 * checksum and allows devices which do not calculate checksum
979 * to use LRO.
980 */
981 if (unlikely(skb->ip_summed != CHECKSUM_UNNECESSARY))
982 return -1;
983
984 /* Check for non-TCP packet */
985 skb_reset_network_header(skb);
986 iph = ip_hdr(skb);
987 if (iph->protocol != IPPROTO_TCP)
988 return -1;
989
990 ip_len = ip_hdrlen(skb);
991 skb_set_transport_header(skb, ip_len);
992 *tcph = tcp_hdr(skb);
993
994 /* check if IP header and TCP header are complete */
995 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
996 return -1;
997
998 *hdr_flags = LRO_IPV4 | LRO_TCP;
999 *iphdr = iph;
1000
1001 return 0;
1002 }
1003
1004 static void ipoib_lro_setup(struct ipoib_dev_priv *priv)
1005 {
1006 priv->lro.lro_mgr.max_aggr = lro_max_aggr;
1007 priv->lro.lro_mgr.max_desc = IPOIB_MAX_LRO_DESCRIPTORS;
1008 priv->lro.lro_mgr.lro_arr = priv->lro.lro_desc;
1009 priv->lro.lro_mgr.get_skb_header = get_skb_hdr;
1010 priv->lro.lro_mgr.features = LRO_F_NAPI;
1011 priv->lro.lro_mgr.dev = priv->dev;
1012 priv->lro.lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1013 }
1014
1015 static void ipoib_setup(struct net_device *dev)
1016 {
1017 struct ipoib_dev_priv *priv = netdev_priv(dev);
1018
1019 dev->open = ipoib_open;
1020 dev->stop = ipoib_stop;
1021 dev->change_mtu = ipoib_change_mtu;
1022 dev->hard_start_xmit = ipoib_start_xmit;
1023 dev->tx_timeout = ipoib_timeout;
1024 dev->header_ops = &ipoib_header_ops;
1025 dev->set_multicast_list = ipoib_set_mcast_list;
1026 dev->neigh_setup = ipoib_neigh_setup_dev;
1027
1028 ipoib_set_ethtool_ops(dev);
1029
1030 netif_napi_add(dev, &priv->napi, ipoib_poll, 100);
1031
1032 dev->watchdog_timeo = HZ;
1033
1034 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1035
1036 /*
1037 * We add in INFINIBAND_ALEN to allow for the destination
1038 * address "pseudoheader" for skbs without neighbour struct.
1039 */
1040 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
1041 dev->addr_len = INFINIBAND_ALEN;
1042 dev->type = ARPHRD_INFINIBAND;
1043 dev->tx_queue_len = ipoib_sendq_size * 2;
1044 dev->features = (NETIF_F_VLAN_CHALLENGED |
1045 NETIF_F_HIGHDMA);
1046
1047 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
1048
1049 netif_carrier_off(dev);
1050
1051 priv->dev = dev;
1052
1053 ipoib_lro_setup(priv);
1054
1055 spin_lock_init(&priv->lock);
1056
1057 mutex_init(&priv->vlan_mutex);
1058
1059 INIT_LIST_HEAD(&priv->path_list);
1060 INIT_LIST_HEAD(&priv->child_intfs);
1061 INIT_LIST_HEAD(&priv->dead_ahs);
1062 INIT_LIST_HEAD(&priv->multicast_list);
1063
1064 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
1065 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
1066 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
1067 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light);
1068 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal);
1069 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
1070 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
1071 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
1072 }
1073
1074 struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
1075 {
1076 struct net_device *dev;
1077
1078 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
1079 ipoib_setup);
1080 if (!dev)
1081 return NULL;
1082
1083 return netdev_priv(dev);
1084 }
1085
1086 static ssize_t show_pkey(struct device *dev,
1087 struct device_attribute *attr, char *buf)
1088 {
1089 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1090
1091 return sprintf(buf, "0x%04x\n", priv->pkey);
1092 }
1093 static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
1094
1095 static ssize_t show_umcast(struct device *dev,
1096 struct device_attribute *attr, char *buf)
1097 {
1098 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1099
1100 return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
1101 }
1102
1103 static ssize_t set_umcast(struct device *dev,
1104 struct device_attribute *attr,
1105 const char *buf, size_t count)
1106 {
1107 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1108 unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
1109
1110 if (umcast_val > 0) {
1111 set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1112 ipoib_warn(priv, "ignoring multicast groups joined directly "
1113 "by userspace\n");
1114 } else
1115 clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1116
1117 return count;
1118 }
1119 static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
1120
1121 int ipoib_add_umcast_attr(struct net_device *dev)
1122 {
1123 return device_create_file(&dev->dev, &dev_attr_umcast);
1124 }
1125
1126 static ssize_t create_child(struct device *dev,
1127 struct device_attribute *attr,
1128 const char *buf, size_t count)
1129 {
1130 int pkey;
1131 int ret;
1132
1133 if (sscanf(buf, "%i", &pkey) != 1)
1134 return -EINVAL;
1135
1136 if (pkey < 0 || pkey > 0xffff)
1137 return -EINVAL;
1138
1139 /*
1140 * Set the full membership bit, so that we join the right
1141 * broadcast group, etc.
1142 */
1143 pkey |= 0x8000;
1144
1145 ret = ipoib_vlan_add(to_net_dev(dev), pkey);
1146
1147 return ret ? ret : count;
1148 }
1149 static DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
1150
1151 static ssize_t delete_child(struct device *dev,
1152 struct device_attribute *attr,
1153 const char *buf, size_t count)
1154 {
1155 int pkey;
1156 int ret;
1157
1158 if (sscanf(buf, "%i", &pkey) != 1)
1159 return -EINVAL;
1160
1161 if (pkey < 0 || pkey > 0xffff)
1162 return -EINVAL;
1163
1164 ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
1165
1166 return ret ? ret : count;
1167
1168 }
1169 static DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
1170
1171 int ipoib_add_pkey_attr(struct net_device *dev)
1172 {
1173 return device_create_file(&dev->dev, &dev_attr_pkey);
1174 }
1175
1176 static struct net_device *ipoib_add_port(const char *format,
1177 struct ib_device *hca, u8 port)
1178 {
1179 struct ipoib_dev_priv *priv;
1180 struct ib_device_attr *device_attr;
1181 struct ib_port_attr attr;
1182 int result = -ENOMEM;
1183
1184 priv = ipoib_intf_alloc(format);
1185 if (!priv)
1186 goto alloc_mem_failed;
1187
1188 SET_NETDEV_DEV(priv->dev, hca->dma_device);
1189
1190 if (!ib_query_port(hca, port, &attr))
1191 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
1192 else {
1193 printk(KERN_WARNING "%s: ib_query_port %d failed\n",
1194 hca->name, port);
1195 goto device_init_failed;
1196 }
1197
1198 /* MTU will be reset when mcast join happens */
1199 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
1200 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu;
1201
1202 result = ib_query_pkey(hca, port, 0, &priv->pkey);
1203 if (result) {
1204 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
1205 hca->name, port, result);
1206 goto device_init_failed;
1207 }
1208
1209 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
1210 if (!device_attr) {
1211 printk(KERN_WARNING "%s: allocation of %zu bytes failed\n",
1212 hca->name, sizeof *device_attr);
1213 goto device_init_failed;
1214 }
1215
1216 result = ib_query_device(hca, device_attr);
1217 if (result) {
1218 printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n",
1219 hca->name, result);
1220 kfree(device_attr);
1221 goto device_init_failed;
1222 }
1223 priv->hca_caps = device_attr->device_cap_flags;
1224
1225 kfree(device_attr);
1226
1227 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
1228 set_bit(IPOIB_FLAG_CSUM, &priv->flags);
1229 priv->dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
1230 }
1231
1232 if (lro)
1233 priv->dev->features |= NETIF_F_LRO;
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 if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO)
1270 priv->dev->features |= NETIF_F_TSO;
1271
1272 result = register_netdev(priv->dev);
1273 if (result) {
1274 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1275 hca->name, port, result);
1276 goto register_failed;
1277 }
1278
1279 ipoib_create_debug_files(priv->dev);
1280
1281 if (ipoib_cm_add_mode_attr(priv->dev))
1282 goto sysfs_failed;
1283 if (ipoib_add_pkey_attr(priv->dev))
1284 goto sysfs_failed;
1285 if (ipoib_add_umcast_attr(priv->dev))
1286 goto sysfs_failed;
1287 if (device_create_file(&priv->dev->dev, &dev_attr_create_child))
1288 goto sysfs_failed;
1289 if (device_create_file(&priv->dev->dev, &dev_attr_delete_child))
1290 goto sysfs_failed;
1291
1292 return priv->dev;
1293
1294 sysfs_failed:
1295 ipoib_delete_debug_files(priv->dev);
1296 unregister_netdev(priv->dev);
1297
1298 register_failed:
1299 ib_unregister_event_handler(&priv->event_handler);
1300 flush_workqueue(ipoib_workqueue);
1301
1302 event_failed:
1303 ipoib_dev_cleanup(priv->dev);
1304
1305 device_init_failed:
1306 free_netdev(priv->dev);
1307
1308 alloc_mem_failed:
1309 return ERR_PTR(result);
1310 }
1311
1312 static void ipoib_add_one(struct ib_device *device)
1313 {
1314 struct list_head *dev_list;
1315 struct net_device *dev;
1316 struct ipoib_dev_priv *priv;
1317 int s, e, p;
1318
1319 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1320 return;
1321
1322 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1323 if (!dev_list)
1324 return;
1325
1326 INIT_LIST_HEAD(dev_list);
1327
1328 if (device->node_type == RDMA_NODE_IB_SWITCH) {
1329 s = 0;
1330 e = 0;
1331 } else {
1332 s = 1;
1333 e = device->phys_port_cnt;
1334 }
1335
1336 for (p = s; p <= e; ++p) {
1337 dev = ipoib_add_port("ib%d", device, p);
1338 if (!IS_ERR(dev)) {
1339 priv = netdev_priv(dev);
1340 list_add_tail(&priv->list, dev_list);
1341 }
1342 }
1343
1344 ib_set_client_data(device, &ipoib_client, dev_list);
1345 }
1346
1347 static void ipoib_remove_one(struct ib_device *device)
1348 {
1349 struct ipoib_dev_priv *priv, *tmp;
1350 struct list_head *dev_list;
1351
1352 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1353 return;
1354
1355 dev_list = ib_get_client_data(device, &ipoib_client);
1356
1357 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1358 ib_unregister_event_handler(&priv->event_handler);
1359
1360 rtnl_lock();
1361 dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP);
1362 rtnl_unlock();
1363
1364 flush_workqueue(ipoib_workqueue);
1365
1366 unregister_netdev(priv->dev);
1367 ipoib_dev_cleanup(priv->dev);
1368 free_netdev(priv->dev);
1369 }
1370
1371 kfree(dev_list);
1372 }
1373
1374 static int __init ipoib_init_module(void)
1375 {
1376 int ret;
1377
1378 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1379 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1380 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1381
1382 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1383 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1384 ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE,
1385 IPOIB_MIN_QUEUE_SIZE));
1386 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1387 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
1388 #endif
1389
1390 /*
1391 * When copying small received packets, we only copy from the
1392 * linear data part of the SKB, so we rely on this condition.
1393 */
1394 BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE);
1395
1396 ret = ipoib_register_debugfs();
1397 if (ret)
1398 return ret;
1399
1400 /*
1401 * We create our own workqueue mainly because we want to be
1402 * able to flush it when devices are being removed. We can't
1403 * use schedule_work()/flush_scheduled_work() because both
1404 * unregister_netdev() and linkwatch_event take the rtnl lock,
1405 * so flush_scheduled_work() can deadlock during device
1406 * removal.
1407 */
1408 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1409 if (!ipoib_workqueue) {
1410 ret = -ENOMEM;
1411 goto err_fs;
1412 }
1413
1414 ib_sa_register_client(&ipoib_sa_client);
1415
1416 ret = ib_register_client(&ipoib_client);
1417 if (ret)
1418 goto err_sa;
1419
1420 return 0;
1421
1422 err_sa:
1423 ib_sa_unregister_client(&ipoib_sa_client);
1424 destroy_workqueue(ipoib_workqueue);
1425
1426 err_fs:
1427 ipoib_unregister_debugfs();
1428
1429 return ret;
1430 }
1431
1432 static void __exit ipoib_cleanup_module(void)
1433 {
1434 ib_unregister_client(&ipoib_client);
1435 ib_sa_unregister_client(&ipoib_sa_client);
1436 ipoib_unregister_debugfs();
1437 destroy_workqueue(ipoib_workqueue);
1438 }
1439
1440 module_init(ipoib_init_module);
1441 module_exit(ipoib_cleanup_module);
kernel source for telekom puls (alcatel/mediatek)