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Merge branch 'FW_BUG' into test
[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
377 spin_lock_irq(&priv->tx_lock);
378 spin_lock(&priv->lock);
379
380 list_splice_init(&priv->path_list, &remove_list);
381
382 list_for_each_entry(path, &remove_list, list)
383 rb_erase(&path->rb_node, &priv->path_tree);
384
385 list_for_each_entry_safe(path, tp, &remove_list, list) {
386 if (path->query)
387 ib_sa_cancel_query(path->query_id, path->query);
388 spin_unlock(&priv->lock);
389 spin_unlock_irq(&priv->tx_lock);
390 wait_for_completion(&path->done);
391 path_free(dev, path);
392 spin_lock_irq(&priv->tx_lock);
393 spin_lock(&priv->lock);
394 }
395 spin_unlock(&priv->lock);
396 spin_unlock_irq(&priv->tx_lock);
397 }
398
399 static void path_rec_completion(int status,
400 struct ib_sa_path_rec *pathrec,
401 void *path_ptr)
402 {
403 struct ipoib_path *path = path_ptr;
404 struct net_device *dev = path->dev;
405 struct ipoib_dev_priv *priv = netdev_priv(dev);
406 struct ipoib_ah *ah = NULL;
407 struct ipoib_ah *old_ah = NULL;
408 struct ipoib_neigh *neigh, *tn;
409 struct sk_buff_head skqueue;
410 struct sk_buff *skb;
411 unsigned long flags;
412
413 if (!status)
414 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
415 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
416 else
417 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
418 status, IPOIB_GID_ARG(path->pathrec.dgid));
419
420 skb_queue_head_init(&skqueue);
421
422 if (!status) {
423 struct ib_ah_attr av;
424
425 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
426 ah = ipoib_create_ah(dev, priv->pd, &av);
427 }
428
429 spin_lock_irqsave(&priv->lock, flags);
430
431 if (ah) {
432 path->pathrec = *pathrec;
433
434 old_ah = path->ah;
435 path->ah = ah;
436
437 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
438 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
439
440 while ((skb = __skb_dequeue(&path->queue)))
441 __skb_queue_tail(&skqueue, skb);
442
443 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
444 if (neigh->ah) {
445 WARN_ON(neigh->ah != old_ah);
446 /*
447 * Dropping the ah reference inside
448 * priv->lock is safe here, because we
449 * will hold one more reference from
450 * the original value of path->ah (ie
451 * old_ah).
452 */
453 ipoib_put_ah(neigh->ah);
454 }
455 kref_get(&path->ah->ref);
456 neigh->ah = path->ah;
457 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
458 sizeof(union ib_gid));
459
460 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
461 if (!ipoib_cm_get(neigh))
462 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
463 path,
464 neigh));
465 if (!ipoib_cm_get(neigh)) {
466 list_del(&neigh->list);
467 if (neigh->ah)
468 ipoib_put_ah(neigh->ah);
469 ipoib_neigh_free(dev, neigh);
470 continue;
471 }
472 }
473
474 while ((skb = __skb_dequeue(&neigh->queue)))
475 __skb_queue_tail(&skqueue, skb);
476 }
477 path->valid = 1;
478 }
479
480 path->query = NULL;
481 complete(&path->done);
482
483 spin_unlock_irqrestore(&priv->lock, flags);
484
485 if (old_ah)
486 ipoib_put_ah(old_ah);
487
488 while ((skb = __skb_dequeue(&skqueue))) {
489 skb->dev = dev;
490 if (dev_queue_xmit(skb))
491 ipoib_warn(priv, "dev_queue_xmit failed "
492 "to requeue packet\n");
493 }
494 }
495
496 static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
497 {
498 struct ipoib_dev_priv *priv = netdev_priv(dev);
499 struct ipoib_path *path;
500
501 if (!priv->broadcast)
502 return NULL;
503
504 path = kzalloc(sizeof *path, GFP_ATOMIC);
505 if (!path)
506 return NULL;
507
508 path->dev = dev;
509
510 skb_queue_head_init(&path->queue);
511
512 INIT_LIST_HEAD(&path->neigh_list);
513
514 memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid));
515 path->pathrec.sgid = priv->local_gid;
516 path->pathrec.pkey = cpu_to_be16(priv->pkey);
517 path->pathrec.numb_path = 1;
518 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
519
520 return path;
521 }
522
523 static int path_rec_start(struct net_device *dev,
524 struct ipoib_path *path)
525 {
526 struct ipoib_dev_priv *priv = netdev_priv(dev);
527
528 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
529 IPOIB_GID_ARG(path->pathrec.dgid));
530
531 init_completion(&path->done);
532
533 path->query_id =
534 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
535 &path->pathrec,
536 IB_SA_PATH_REC_DGID |
537 IB_SA_PATH_REC_SGID |
538 IB_SA_PATH_REC_NUMB_PATH |
539 IB_SA_PATH_REC_TRAFFIC_CLASS |
540 IB_SA_PATH_REC_PKEY,
541 1000, GFP_ATOMIC,
542 path_rec_completion,
543 path, &path->query);
544 if (path->query_id < 0) {
545 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
546 path->query = NULL;
547 return path->query_id;
548 }
549
550 return 0;
551 }
552
553 static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
554 {
555 struct ipoib_dev_priv *priv = netdev_priv(dev);
556 struct ipoib_path *path;
557 struct ipoib_neigh *neigh;
558
559 neigh = ipoib_neigh_alloc(skb->dst->neighbour, skb->dev);
560 if (!neigh) {
561 ++dev->stats.tx_dropped;
562 dev_kfree_skb_any(skb);
563 return;
564 }
565
566 /*
567 * We can only be called from ipoib_start_xmit, so we're
568 * inside tx_lock -- no need to save/restore flags.
569 */
570 spin_lock(&priv->lock);
571
572 path = __path_find(dev, skb->dst->neighbour->ha + 4);
573 if (!path) {
574 path = path_rec_create(dev, skb->dst->neighbour->ha + 4);
575 if (!path)
576 goto err_path;
577
578 __path_add(dev, path);
579 }
580
581 list_add_tail(&neigh->list, &path->neigh_list);
582
583 if (path->ah) {
584 kref_get(&path->ah->ref);
585 neigh->ah = path->ah;
586 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
587 sizeof(union ib_gid));
588
589 if (ipoib_cm_enabled(dev, neigh->neighbour)) {
590 if (!ipoib_cm_get(neigh))
591 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
592 if (!ipoib_cm_get(neigh)) {
593 list_del(&neigh->list);
594 if (neigh->ah)
595 ipoib_put_ah(neigh->ah);
596 ipoib_neigh_free(dev, neigh);
597 goto err_drop;
598 }
599 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
600 __skb_queue_tail(&neigh->queue, skb);
601 else {
602 ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
603 skb_queue_len(&neigh->queue));
604 goto err_drop;
605 }
606 } else
607 ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha));
608 } else {
609 neigh->ah = NULL;
610
611 if (!path->query && path_rec_start(dev, path))
612 goto err_list;
613
614 __skb_queue_tail(&neigh->queue, skb);
615 }
616
617 spin_unlock(&priv->lock);
618 return;
619
620 err_list:
621 list_del(&neigh->list);
622
623 err_path:
624 ipoib_neigh_free(dev, neigh);
625 err_drop:
626 ++dev->stats.tx_dropped;
627 dev_kfree_skb_any(skb);
628
629 spin_unlock(&priv->lock);
630 }
631
632 static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
633 {
634 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
635
636 /* Look up path record for unicasts */
637 if (skb->dst->neighbour->ha[4] != 0xff) {
638 neigh_add_path(skb, dev);
639 return;
640 }
641
642 /* Add in the P_Key for multicasts */
643 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
644 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
645 ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb);
646 }
647
648 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
649 struct ipoib_pseudoheader *phdr)
650 {
651 struct ipoib_dev_priv *priv = netdev_priv(dev);
652 struct ipoib_path *path;
653
654 /*
655 * We can only be called from ipoib_start_xmit, so we're
656 * inside tx_lock -- no need to save/restore flags.
657 */
658 spin_lock(&priv->lock);
659
660 path = __path_find(dev, phdr->hwaddr + 4);
661 if (!path || !path->valid) {
662 if (!path)
663 path = path_rec_create(dev, phdr->hwaddr + 4);
664 if (path) {
665 /* put pseudoheader back on for next time */
666 skb_push(skb, sizeof *phdr);
667 __skb_queue_tail(&path->queue, skb);
668
669 if (path_rec_start(dev, path)) {
670 spin_unlock(&priv->lock);
671 path_free(dev, path);
672 return;
673 } else
674 __path_add(dev, path);
675 } else {
676 ++dev->stats.tx_dropped;
677 dev_kfree_skb_any(skb);
678 }
679
680 spin_unlock(&priv->lock);
681 return;
682 }
683
684 if (path->ah) {
685 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
686 be16_to_cpu(path->pathrec.dlid));
687
688 ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr));
689 } else if ((path->query || !path_rec_start(dev, path)) &&
690 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
691 /* put pseudoheader back on for next time */
692 skb_push(skb, sizeof *phdr);
693 __skb_queue_tail(&path->queue, skb);
694 } else {
695 ++dev->stats.tx_dropped;
696 dev_kfree_skb_any(skb);
697 }
698
699 spin_unlock(&priv->lock);
700 }
701
702 static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
703 {
704 struct ipoib_dev_priv *priv = netdev_priv(dev);
705 struct ipoib_neigh *neigh;
706 unsigned long flags;
707
708 if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags)))
709 return NETDEV_TX_LOCKED;
710
711 if (likely(skb->dst && skb->dst->neighbour)) {
712 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
713 ipoib_path_lookup(skb, dev);
714 goto out;
715 }
716
717 neigh = *to_ipoib_neigh(skb->dst->neighbour);
718
719 if (neigh->ah)
720 if (unlikely((memcmp(&neigh->dgid.raw,
721 skb->dst->neighbour->ha + 4,
722 sizeof(union ib_gid))) ||
723 (neigh->dev != dev))) {
724 spin_lock(&priv->lock);
725 /*
726 * It's safe to call ipoib_put_ah() inside
727 * priv->lock here, because we know that
728 * path->ah will always hold one more reference,
729 * so ipoib_put_ah() will never do more than
730 * decrement the ref count.
731 */
732 ipoib_put_ah(neigh->ah);
733 list_del(&neigh->list);
734 ipoib_neigh_free(dev, neigh);
735 spin_unlock(&priv->lock);
736 ipoib_path_lookup(skb, dev);
737 goto out;
738 }
739
740 if (ipoib_cm_get(neigh)) {
741 if (ipoib_cm_up(neigh)) {
742 ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
743 goto out;
744 }
745 } else if (neigh->ah) {
746 ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha));
747 goto out;
748 }
749
750 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
751 spin_lock(&priv->lock);
752 __skb_queue_tail(&neigh->queue, skb);
753 spin_unlock(&priv->lock);
754 } else {
755 ++dev->stats.tx_dropped;
756 dev_kfree_skb_any(skb);
757 }
758 } else {
759 struct ipoib_pseudoheader *phdr =
760 (struct ipoib_pseudoheader *) skb->data;
761 skb_pull(skb, sizeof *phdr);
762
763 if (phdr->hwaddr[4] == 0xff) {
764 /* Add in the P_Key for multicast*/
765 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
766 phdr->hwaddr[9] = priv->pkey & 0xff;
767
768 ipoib_mcast_send(dev, phdr->hwaddr + 4, skb);
769 } else {
770 /* unicast GID -- should be ARP or RARP reply */
771
772 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
773 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
774 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
775 IPOIB_GID_FMT "\n",
776 skb->dst ? "neigh" : "dst",
777 be16_to_cpup((__be16 *) skb->data),
778 IPOIB_QPN(phdr->hwaddr),
779 IPOIB_GID_RAW_ARG(phdr->hwaddr + 4));
780 dev_kfree_skb_any(skb);
781 ++dev->stats.tx_dropped;
782 goto out;
783 }
784
785 unicast_arp_send(skb, dev, phdr);
786 }
787 }
788
789 out:
790 spin_unlock_irqrestore(&priv->tx_lock, flags);
791
792 return NETDEV_TX_OK;
793 }
794
795 static void ipoib_timeout(struct net_device *dev)
796 {
797 struct ipoib_dev_priv *priv = netdev_priv(dev);
798
799 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
800 jiffies_to_msecs(jiffies - dev->trans_start));
801 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
802 netif_queue_stopped(dev),
803 priv->tx_head, priv->tx_tail);
804 /* XXX reset QP, etc. */
805 }
806
807 static int ipoib_hard_header(struct sk_buff *skb,
808 struct net_device *dev,
809 unsigned short type,
810 const void *daddr, const void *saddr, unsigned len)
811 {
812 struct ipoib_header *header;
813
814 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
815
816 header->proto = htons(type);
817 header->reserved = 0;
818
819 /*
820 * If we don't have a neighbour structure, stuff the
821 * destination address onto the front of the skb so we can
822 * figure out where to send the packet later.
823 */
824 if ((!skb->dst || !skb->dst->neighbour) && daddr) {
825 struct ipoib_pseudoheader *phdr =
826 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
827 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
828 }
829
830 return 0;
831 }
832
833 static void ipoib_set_mcast_list(struct net_device *dev)
834 {
835 struct ipoib_dev_priv *priv = netdev_priv(dev);
836
837 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
838 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
839 return;
840 }
841
842 queue_work(ipoib_workqueue, &priv->restart_task);
843 }
844
845 static void ipoib_neigh_cleanup(struct neighbour *n)
846 {
847 struct ipoib_neigh *neigh;
848 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
849 unsigned long flags;
850 struct ipoib_ah *ah = NULL;
851
852 neigh = *to_ipoib_neigh(n);
853 if (neigh)
854 priv = netdev_priv(neigh->dev);
855 else
856 return;
857 ipoib_dbg(priv,
858 "neigh_cleanup for %06x " IPOIB_GID_FMT "\n",
859 IPOIB_QPN(n->ha),
860 IPOIB_GID_RAW_ARG(n->ha + 4));
861
862 spin_lock_irqsave(&priv->lock, flags);
863
864 if (neigh->ah)
865 ah = neigh->ah;
866 list_del(&neigh->list);
867 ipoib_neigh_free(n->dev, neigh);
868
869 spin_unlock_irqrestore(&priv->lock, flags);
870
871 if (ah)
872 ipoib_put_ah(ah);
873 }
874
875 struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour,
876 struct net_device *dev)
877 {
878 struct ipoib_neigh *neigh;
879
880 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
881 if (!neigh)
882 return NULL;
883
884 neigh->neighbour = neighbour;
885 neigh->dev = dev;
886 *to_ipoib_neigh(neighbour) = neigh;
887 skb_queue_head_init(&neigh->queue);
888 ipoib_cm_set(neigh, NULL);
889
890 return neigh;
891 }
892
893 void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
894 {
895 struct sk_buff *skb;
896 *to_ipoib_neigh(neigh->neighbour) = NULL;
897 while ((skb = __skb_dequeue(&neigh->queue))) {
898 ++dev->stats.tx_dropped;
899 dev_kfree_skb_any(skb);
900 }
901 if (ipoib_cm_get(neigh))
902 ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
903 kfree(neigh);
904 }
905
906 static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
907 {
908 parms->neigh_cleanup = ipoib_neigh_cleanup;
909
910 return 0;
911 }
912
913 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
914 {
915 struct ipoib_dev_priv *priv = netdev_priv(dev);
916
917 /* Allocate RX/TX "rings" to hold queued skbs */
918 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
919 GFP_KERNEL);
920 if (!priv->rx_ring) {
921 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
922 ca->name, ipoib_recvq_size);
923 goto out;
924 }
925
926 priv->tx_ring = vmalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
927 if (!priv->tx_ring) {
928 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
929 ca->name, ipoib_sendq_size);
930 goto out_rx_ring_cleanup;
931 }
932 memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring);
933
934 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
935
936 if (ipoib_ib_dev_init(dev, ca, port))
937 goto out_tx_ring_cleanup;
938
939 return 0;
940
941 out_tx_ring_cleanup:
942 vfree(priv->tx_ring);
943
944 out_rx_ring_cleanup:
945 kfree(priv->rx_ring);
946
947 out:
948 return -ENOMEM;
949 }
950
951 void ipoib_dev_cleanup(struct net_device *dev)
952 {
953 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
954
955 ipoib_delete_debug_files(dev);
956
957 /* Delete any child interfaces first */
958 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
959 unregister_netdev(cpriv->dev);
960 ipoib_dev_cleanup(cpriv->dev);
961 free_netdev(cpriv->dev);
962 }
963
964 ipoib_ib_dev_cleanup(dev);
965
966 kfree(priv->rx_ring);
967 vfree(priv->tx_ring);
968
969 priv->rx_ring = NULL;
970 priv->tx_ring = NULL;
971 }
972
973 static const struct header_ops ipoib_header_ops = {
974 .create = ipoib_hard_header,
975 };
976
977 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
978 void **tcph, u64 *hdr_flags, void *priv)
979 {
980 unsigned int ip_len;
981 struct iphdr *iph;
982
983 if (unlikely(skb->protocol != htons(ETH_P_IP)))
984 return -1;
985
986 /*
987 * In the future we may add an else clause that verifies the
988 * checksum and allows devices which do not calculate checksum
989 * to use LRO.
990 */
991 if (unlikely(skb->ip_summed != CHECKSUM_UNNECESSARY))
992 return -1;
993
994 /* Check for non-TCP packet */
995 skb_reset_network_header(skb);
996 iph = ip_hdr(skb);
997 if (iph->protocol != IPPROTO_TCP)
998 return -1;
999
1000 ip_len = ip_hdrlen(skb);
1001 skb_set_transport_header(skb, ip_len);
1002 *tcph = tcp_hdr(skb);
1003
1004 /* check if IP header and TCP header are complete */
1005 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
1006 return -1;
1007
1008 *hdr_flags = LRO_IPV4 | LRO_TCP;
1009 *iphdr = iph;
1010
1011 return 0;
1012 }
1013
1014 static void ipoib_lro_setup(struct ipoib_dev_priv *priv)
1015 {
1016 priv->lro.lro_mgr.max_aggr = lro_max_aggr;
1017 priv->lro.lro_mgr.max_desc = IPOIB_MAX_LRO_DESCRIPTORS;
1018 priv->lro.lro_mgr.lro_arr = priv->lro.lro_desc;
1019 priv->lro.lro_mgr.get_skb_header = get_skb_hdr;
1020 priv->lro.lro_mgr.features = LRO_F_NAPI;
1021 priv->lro.lro_mgr.dev = priv->dev;
1022 priv->lro.lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1023 }
1024
1025 static void ipoib_setup(struct net_device *dev)
1026 {
1027 struct ipoib_dev_priv *priv = netdev_priv(dev);
1028
1029 dev->open = ipoib_open;
1030 dev->stop = ipoib_stop;
1031 dev->change_mtu = ipoib_change_mtu;
1032 dev->hard_start_xmit = ipoib_start_xmit;
1033 dev->tx_timeout = ipoib_timeout;
1034 dev->header_ops = &ipoib_header_ops;
1035 dev->set_multicast_list = ipoib_set_mcast_list;
1036 dev->neigh_setup = ipoib_neigh_setup_dev;
1037
1038 ipoib_set_ethtool_ops(dev);
1039
1040 netif_napi_add(dev, &priv->napi, ipoib_poll, 100);
1041
1042 dev->watchdog_timeo = HZ;
1043
1044 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1045
1046 /*
1047 * We add in INFINIBAND_ALEN to allow for the destination
1048 * address "pseudoheader" for skbs without neighbour struct.
1049 */
1050 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
1051 dev->addr_len = INFINIBAND_ALEN;
1052 dev->type = ARPHRD_INFINIBAND;
1053 dev->tx_queue_len = ipoib_sendq_size * 2;
1054 dev->features = (NETIF_F_VLAN_CHALLENGED |
1055 NETIF_F_LLTX |
1056 NETIF_F_HIGHDMA);
1057
1058 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
1059
1060 netif_carrier_off(dev);
1061
1062 priv->dev = dev;
1063
1064 ipoib_lro_setup(priv);
1065
1066 spin_lock_init(&priv->lock);
1067 spin_lock_init(&priv->tx_lock);
1068
1069 mutex_init(&priv->vlan_mutex);
1070
1071 INIT_LIST_HEAD(&priv->path_list);
1072 INIT_LIST_HEAD(&priv->child_intfs);
1073 INIT_LIST_HEAD(&priv->dead_ahs);
1074 INIT_LIST_HEAD(&priv->multicast_list);
1075
1076 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
1077 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
1078 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
1079 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light);
1080 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal);
1081 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
1082 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
1083 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
1084 }
1085
1086 struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
1087 {
1088 struct net_device *dev;
1089
1090 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
1091 ipoib_setup);
1092 if (!dev)
1093 return NULL;
1094
1095 return netdev_priv(dev);
1096 }
1097
1098 static ssize_t show_pkey(struct device *dev,
1099 struct device_attribute *attr, char *buf)
1100 {
1101 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1102
1103 return sprintf(buf, "0x%04x\n", priv->pkey);
1104 }
1105 static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
1106
1107 static ssize_t show_umcast(struct device *dev,
1108 struct device_attribute *attr, char *buf)
1109 {
1110 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1111
1112 return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
1113 }
1114
1115 static ssize_t set_umcast(struct device *dev,
1116 struct device_attribute *attr,
1117 const char *buf, size_t count)
1118 {
1119 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev));
1120 unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
1121
1122 if (umcast_val > 0) {
1123 set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1124 ipoib_warn(priv, "ignoring multicast groups joined directly "
1125 "by userspace\n");
1126 } else
1127 clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
1128
1129 return count;
1130 }
1131 static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
1132
1133 int ipoib_add_umcast_attr(struct net_device *dev)
1134 {
1135 return device_create_file(&dev->dev, &dev_attr_umcast);
1136 }
1137
1138 static ssize_t create_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 /*
1152 * Set the full membership bit, so that we join the right
1153 * broadcast group, etc.
1154 */
1155 pkey |= 0x8000;
1156
1157 ret = ipoib_vlan_add(to_net_dev(dev), pkey);
1158
1159 return ret ? ret : count;
1160 }
1161 static DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
1162
1163 static ssize_t delete_child(struct device *dev,
1164 struct device_attribute *attr,
1165 const char *buf, size_t count)
1166 {
1167 int pkey;
1168 int ret;
1169
1170 if (sscanf(buf, "%i", &pkey) != 1)
1171 return -EINVAL;
1172
1173 if (pkey < 0 || pkey > 0xffff)
1174 return -EINVAL;
1175
1176 ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
1177
1178 return ret ? ret : count;
1179
1180 }
1181 static DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
1182
1183 int ipoib_add_pkey_attr(struct net_device *dev)
1184 {
1185 return device_create_file(&dev->dev, &dev_attr_pkey);
1186 }
1187
1188 static struct net_device *ipoib_add_port(const char *format,
1189 struct ib_device *hca, u8 port)
1190 {
1191 struct ipoib_dev_priv *priv;
1192 struct ib_device_attr *device_attr;
1193 struct ib_port_attr attr;
1194 int result = -ENOMEM;
1195
1196 priv = ipoib_intf_alloc(format);
1197 if (!priv)
1198 goto alloc_mem_failed;
1199
1200 SET_NETDEV_DEV(priv->dev, hca->dma_device);
1201
1202 if (!ib_query_port(hca, port, &attr))
1203 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
1204 else {
1205 printk(KERN_WARNING "%s: ib_query_port %d failed\n",
1206 hca->name, port);
1207 goto device_init_failed;
1208 }
1209
1210 /* MTU will be reset when mcast join happens */
1211 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
1212 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu;
1213
1214 result = ib_query_pkey(hca, port, 0, &priv->pkey);
1215 if (result) {
1216 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
1217 hca->name, port, result);
1218 goto device_init_failed;
1219 }
1220
1221 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
1222 if (!device_attr) {
1223 printk(KERN_WARNING "%s: allocation of %zu bytes failed\n",
1224 hca->name, sizeof *device_attr);
1225 goto device_init_failed;
1226 }
1227
1228 result = ib_query_device(hca, device_attr);
1229 if (result) {
1230 printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n",
1231 hca->name, result);
1232 kfree(device_attr);
1233 goto device_init_failed;
1234 }
1235 priv->hca_caps = device_attr->device_cap_flags;
1236
1237 kfree(device_attr);
1238
1239 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
1240 set_bit(IPOIB_FLAG_CSUM, &priv->flags);
1241 priv->dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
1242 }
1243
1244 if (lro)
1245 priv->dev->features |= NETIF_F_LRO;
1246
1247 /*
1248 * Set the full membership bit, so that we join the right
1249 * broadcast group, etc.
1250 */
1251 priv->pkey |= 0x8000;
1252
1253 priv->dev->broadcast[8] = priv->pkey >> 8;
1254 priv->dev->broadcast[9] = priv->pkey & 0xff;
1255
1256 result = ib_query_gid(hca, port, 0, &priv->local_gid);
1257 if (result) {
1258 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1259 hca->name, port, result);
1260 goto device_init_failed;
1261 } else
1262 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
1263
1264 result = ipoib_dev_init(priv->dev, hca, port);
1265 if (result < 0) {
1266 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1267 hca->name, port, result);
1268 goto device_init_failed;
1269 }
1270
1271 INIT_IB_EVENT_HANDLER(&priv->event_handler,
1272 priv->ca, ipoib_event);
1273 result = ib_register_event_handler(&priv->event_handler);
1274 if (result < 0) {
1275 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1276 "port %d (ret = %d)\n",
1277 hca->name, port, result);
1278 goto event_failed;
1279 }
1280
1281 if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO)
1282 priv->dev->features |= NETIF_F_TSO;
1283
1284 result = register_netdev(priv->dev);
1285 if (result) {
1286 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1287 hca->name, port, result);
1288 goto register_failed;
1289 }
1290
1291 ipoib_create_debug_files(priv->dev);
1292
1293 if (ipoib_cm_add_mode_attr(priv->dev))
1294 goto sysfs_failed;
1295 if (ipoib_add_pkey_attr(priv->dev))
1296 goto sysfs_failed;
1297 if (ipoib_add_umcast_attr(priv->dev))
1298 goto sysfs_failed;
1299 if (device_create_file(&priv->dev->dev, &dev_attr_create_child))
1300 goto sysfs_failed;
1301 if (device_create_file(&priv->dev->dev, &dev_attr_delete_child))
1302 goto sysfs_failed;
1303
1304 return priv->dev;
1305
1306 sysfs_failed:
1307 ipoib_delete_debug_files(priv->dev);
1308 unregister_netdev(priv->dev);
1309
1310 register_failed:
1311 ib_unregister_event_handler(&priv->event_handler);
1312 flush_workqueue(ipoib_workqueue);
1313
1314 event_failed:
1315 ipoib_dev_cleanup(priv->dev);
1316
1317 device_init_failed:
1318 free_netdev(priv->dev);
1319
1320 alloc_mem_failed:
1321 return ERR_PTR(result);
1322 }
1323
1324 static void ipoib_add_one(struct ib_device *device)
1325 {
1326 struct list_head *dev_list;
1327 struct net_device *dev;
1328 struct ipoib_dev_priv *priv;
1329 int s, e, p;
1330
1331 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1332 return;
1333
1334 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1335 if (!dev_list)
1336 return;
1337
1338 INIT_LIST_HEAD(dev_list);
1339
1340 if (device->node_type == RDMA_NODE_IB_SWITCH) {
1341 s = 0;
1342 e = 0;
1343 } else {
1344 s = 1;
1345 e = device->phys_port_cnt;
1346 }
1347
1348 for (p = s; p <= e; ++p) {
1349 dev = ipoib_add_port("ib%d", device, p);
1350 if (!IS_ERR(dev)) {
1351 priv = netdev_priv(dev);
1352 list_add_tail(&priv->list, dev_list);
1353 }
1354 }
1355
1356 ib_set_client_data(device, &ipoib_client, dev_list);
1357 }
1358
1359 static void ipoib_remove_one(struct ib_device *device)
1360 {
1361 struct ipoib_dev_priv *priv, *tmp;
1362 struct list_head *dev_list;
1363
1364 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1365 return;
1366
1367 dev_list = ib_get_client_data(device, &ipoib_client);
1368
1369 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1370 ib_unregister_event_handler(&priv->event_handler);
1371
1372 rtnl_lock();
1373 dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP);
1374 rtnl_unlock();
1375
1376 flush_workqueue(ipoib_workqueue);
1377
1378 unregister_netdev(priv->dev);
1379 ipoib_dev_cleanup(priv->dev);
1380 free_netdev(priv->dev);
1381 }
1382
1383 kfree(dev_list);
1384 }
1385
1386 static int __init ipoib_init_module(void)
1387 {
1388 int ret;
1389
1390 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1391 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1392 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1393
1394 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1395 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1396 ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE,
1397 IPOIB_MIN_QUEUE_SIZE));
1398 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1399 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
1400 #endif
1401
1402 /*
1403 * When copying small received packets, we only copy from the
1404 * linear data part of the SKB, so we rely on this condition.
1405 */
1406 BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE);
1407
1408 ret = ipoib_register_debugfs();
1409 if (ret)
1410 return ret;
1411
1412 /*
1413 * We create our own workqueue mainly because we want to be
1414 * able to flush it when devices are being removed. We can't
1415 * use schedule_work()/flush_scheduled_work() because both
1416 * unregister_netdev() and linkwatch_event take the rtnl lock,
1417 * so flush_scheduled_work() can deadlock during device
1418 * removal.
1419 */
1420 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1421 if (!ipoib_workqueue) {
1422 ret = -ENOMEM;
1423 goto err_fs;
1424 }
1425
1426 ib_sa_register_client(&ipoib_sa_client);
1427
1428 ret = ib_register_client(&ipoib_client);
1429 if (ret)
1430 goto err_sa;
1431
1432 return 0;
1433
1434 err_sa:
1435 ib_sa_unregister_client(&ipoib_sa_client);
1436 destroy_workqueue(ipoib_workqueue);
1437
1438 err_fs:
1439 ipoib_unregister_debugfs();
1440
1441 return ret;
1442 }
1443
1444 static void __exit ipoib_cleanup_module(void)
1445 {
1446 ib_unregister_client(&ipoib_client);
1447 ib_sa_unregister_client(&ipoib_sa_client);
1448 ipoib_unregister_debugfs();
1449 destroy_workqueue(ipoib_workqueue);
1450 }
1451
1452 module_init(ipoib_init_module);
1453 module_exit(ipoib_cleanup_module);
kernel source for telekom puls (alcatel/mediatek)