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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
4 | * Copyright (c) 2004 Voltaire, Inc. All rights reserved. | |
1da177e4 LT |
5 | * |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
33 | * | |
34 | * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $ | |
35 | */ | |
36 | ||
37 | #include "ipoib.h" | |
38 | ||
1da177e4 LT |
39 | #include <linux/module.h> |
40 | ||
41 | #include <linux/init.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/vmalloc.h> | |
44 | ||
45 | #include <linux/if_arp.h> /* For ARPHRD_xxx */ | |
46 | ||
47 | #include <linux/ip.h> | |
48 | #include <linux/in.h> | |
49 | ||
14c85021 ACM |
50 | #include <net/dst.h> |
51 | ||
1da177e4 LT |
52 | MODULE_AUTHOR("Roland Dreier"); |
53 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
56 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG | |
57 | int ipoib_debug_level; | |
58 | ||
59 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
60 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
61 | #endif | |
62 | ||
1732b0ef RD |
63 | struct ipoib_path_iter { |
64 | struct net_device *dev; | |
65 | struct ipoib_path path; | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | static const u8 ipv4_bcast_addr[] = { |
69 | 0x00, 0xff, 0xff, 0xff, | |
70 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
71 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
72 | }; | |
73 | ||
74 | struct workqueue_struct *ipoib_workqueue; | |
75 | ||
76 | static void ipoib_add_one(struct ib_device *device); | |
77 | static void ipoib_remove_one(struct ib_device *device); | |
78 | ||
79 | static struct ib_client ipoib_client = { | |
80 | .name = "ipoib", | |
81 | .add = ipoib_add_one, | |
82 | .remove = ipoib_remove_one | |
83 | }; | |
84 | ||
85 | int ipoib_open(struct net_device *dev) | |
86 | { | |
87 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
88 | ||
89 | ipoib_dbg(priv, "bringing up interface\n"); | |
90 | ||
91 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
92 | ||
93 | if (ipoib_pkey_dev_delay_open(dev)) | |
94 | return 0; | |
95 | ||
96 | if (ipoib_ib_dev_open(dev)) | |
97 | return -EINVAL; | |
98 | ||
267ee88e RD |
99 | if (ipoib_ib_dev_up(dev)) { |
100 | ipoib_ib_dev_stop(dev); | |
1da177e4 | 101 | return -EINVAL; |
267ee88e | 102 | } |
1da177e4 LT |
103 | |
104 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
105 | struct ipoib_dev_priv *cpriv; | |
106 | ||
107 | /* Bring up any child interfaces too */ | |
108 | down(&priv->vlan_mutex); | |
109 | list_for_each_entry(cpriv, &priv->child_intfs, list) { | |
110 | int flags; | |
111 | ||
112 | flags = cpriv->dev->flags; | |
113 | if (flags & IFF_UP) | |
114 | continue; | |
115 | ||
116 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
117 | } | |
118 | up(&priv->vlan_mutex); | |
119 | } | |
120 | ||
121 | netif_start_queue(dev); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static int ipoib_stop(struct net_device *dev) | |
127 | { | |
128 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
129 | ||
130 | ipoib_dbg(priv, "stopping interface\n"); | |
131 | ||
132 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
133 | ||
134 | netif_stop_queue(dev); | |
135 | ||
136 | ipoib_ib_dev_down(dev); | |
137 | ipoib_ib_dev_stop(dev); | |
138 | ||
139 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
140 | struct ipoib_dev_priv *cpriv; | |
141 | ||
142 | /* Bring down any child interfaces too */ | |
143 | down(&priv->vlan_mutex); | |
144 | list_for_each_entry(cpriv, &priv->child_intfs, list) { | |
145 | int flags; | |
146 | ||
147 | flags = cpriv->dev->flags; | |
148 | if (!(flags & IFF_UP)) | |
149 | continue; | |
150 | ||
151 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
152 | } | |
153 | up(&priv->vlan_mutex); | |
154 | } | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) | |
160 | { | |
161 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
162 | ||
163 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) | |
164 | return -EINVAL; | |
165 | ||
166 | priv->admin_mtu = new_mtu; | |
167 | ||
168 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static struct ipoib_path *__path_find(struct net_device *dev, | |
174 | union ib_gid *gid) | |
175 | { | |
176 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
177 | struct rb_node *n = priv->path_tree.rb_node; | |
178 | struct ipoib_path *path; | |
179 | int ret; | |
180 | ||
181 | while (n) { | |
182 | path = rb_entry(n, struct ipoib_path, rb_node); | |
183 | ||
184 | ret = memcmp(gid->raw, path->pathrec.dgid.raw, | |
185 | sizeof (union ib_gid)); | |
186 | ||
187 | if (ret < 0) | |
188 | n = n->rb_left; | |
189 | else if (ret > 0) | |
190 | n = n->rb_right; | |
191 | else | |
192 | return path; | |
193 | } | |
194 | ||
195 | return NULL; | |
196 | } | |
197 | ||
198 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
199 | { | |
200 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
201 | struct rb_node **n = &priv->path_tree.rb_node; | |
202 | struct rb_node *pn = NULL; | |
203 | struct ipoib_path *tpath; | |
204 | int ret; | |
205 | ||
206 | while (*n) { | |
207 | pn = *n; | |
208 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
209 | ||
210 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
211 | sizeof (union ib_gid)); | |
212 | if (ret < 0) | |
213 | n = &pn->rb_left; | |
214 | else if (ret > 0) | |
215 | n = &pn->rb_right; | |
216 | else | |
217 | return -EEXIST; | |
218 | } | |
219 | ||
220 | rb_link_node(&path->rb_node, pn, n); | |
221 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
222 | ||
223 | list_add_tail(&path->list, &priv->path_list); | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
229 | { | |
230 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
231 | struct ipoib_neigh *neigh, *tn; | |
232 | struct sk_buff *skb; | |
233 | unsigned long flags; | |
234 | ||
235 | while ((skb = __skb_dequeue(&path->queue))) | |
236 | dev_kfree_skb_irq(skb); | |
237 | ||
238 | spin_lock_irqsave(&priv->lock, flags); | |
239 | ||
240 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
241 | /* | |
242 | * It's safe to call ipoib_put_ah() inside priv->lock | |
243 | * here, because we know that path->ah will always | |
244 | * hold one more reference, so ipoib_put_ah() will | |
245 | * never do more than decrement the ref count. | |
246 | */ | |
247 | if (neigh->ah) | |
248 | ipoib_put_ah(neigh->ah); | |
249 | *to_ipoib_neigh(neigh->neighbour) = NULL; | |
250 | neigh->neighbour->ops->destructor = NULL; | |
251 | kfree(neigh); | |
252 | } | |
253 | ||
254 | spin_unlock_irqrestore(&priv->lock, flags); | |
255 | ||
256 | if (path->ah) | |
257 | ipoib_put_ah(path->ah); | |
258 | ||
259 | kfree(path); | |
260 | } | |
261 | ||
1732b0ef RD |
262 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
263 | ||
264 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
265 | { | |
266 | struct ipoib_path_iter *iter; | |
267 | ||
268 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
269 | if (!iter) | |
270 | return NULL; | |
271 | ||
272 | iter->dev = dev; | |
273 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
274 | ||
275 | if (ipoib_path_iter_next(iter)) { | |
276 | kfree(iter); | |
277 | return NULL; | |
278 | } | |
279 | ||
280 | return iter; | |
281 | } | |
282 | ||
283 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
284 | { | |
285 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
286 | struct rb_node *n; | |
287 | struct ipoib_path *path; | |
288 | int ret = 1; | |
289 | ||
290 | spin_lock_irq(&priv->lock); | |
291 | ||
292 | n = rb_first(&priv->path_tree); | |
293 | ||
294 | while (n) { | |
295 | path = rb_entry(n, struct ipoib_path, rb_node); | |
296 | ||
297 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
298 | sizeof (union ib_gid)) < 0) { | |
299 | iter->path = *path; | |
300 | ret = 0; | |
301 | break; | |
302 | } | |
303 | ||
304 | n = rb_next(n); | |
305 | } | |
306 | ||
307 | spin_unlock_irq(&priv->lock); | |
308 | ||
309 | return ret; | |
310 | } | |
311 | ||
312 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
313 | struct ipoib_path *path) | |
314 | { | |
315 | *path = iter->path; | |
316 | } | |
317 | ||
318 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
319 | ||
1da177e4 LT |
320 | void ipoib_flush_paths(struct net_device *dev) |
321 | { | |
322 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
323 | struct ipoib_path *path, *tp; | |
324 | LIST_HEAD(remove_list); | |
325 | unsigned long flags; | |
326 | ||
327 | spin_lock_irqsave(&priv->lock, flags); | |
328 | ||
329 | list_splice(&priv->path_list, &remove_list); | |
330 | INIT_LIST_HEAD(&priv->path_list); | |
331 | ||
332 | list_for_each_entry(path, &remove_list, list) | |
333 | rb_erase(&path->rb_node, &priv->path_tree); | |
334 | ||
335 | spin_unlock_irqrestore(&priv->lock, flags); | |
336 | ||
337 | list_for_each_entry_safe(path, tp, &remove_list, list) { | |
338 | if (path->query) | |
339 | ib_sa_cancel_query(path->query_id, path->query); | |
340 | wait_for_completion(&path->done); | |
341 | path_free(dev, path); | |
342 | } | |
343 | } | |
344 | ||
345 | static void path_rec_completion(int status, | |
346 | struct ib_sa_path_rec *pathrec, | |
347 | void *path_ptr) | |
348 | { | |
349 | struct ipoib_path *path = path_ptr; | |
350 | struct net_device *dev = path->dev; | |
351 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
352 | struct ipoib_ah *ah = NULL; | |
353 | struct ipoib_neigh *neigh; | |
354 | struct sk_buff_head skqueue; | |
355 | struct sk_buff *skb; | |
356 | unsigned long flags; | |
357 | ||
358 | if (pathrec) | |
359 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", | |
360 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); | |
361 | else | |
362 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", | |
363 | status, IPOIB_GID_ARG(path->pathrec.dgid)); | |
364 | ||
365 | skb_queue_head_init(&skqueue); | |
366 | ||
367 | if (!status) { | |
368 | struct ib_ah_attr av = { | |
369 | .dlid = be16_to_cpu(pathrec->dlid), | |
370 | .sl = pathrec->sl, | |
371 | .port_num = priv->port | |
372 | }; | |
e6ded99c | 373 | int path_rate = ib_sa_rate_enum_to_int(pathrec->rate); |
1da177e4 | 374 | |
e6ded99c RD |
375 | if (path_rate > 0 && priv->local_rate > path_rate) |
376 | av.static_rate = (priv->local_rate - 1) / path_rate; | |
1da177e4 LT |
377 | |
378 | ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n", | |
379 | av.static_rate, priv->local_rate, | |
380 | ib_sa_rate_enum_to_int(pathrec->rate)); | |
381 | ||
382 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
383 | } | |
384 | ||
385 | spin_lock_irqsave(&priv->lock, flags); | |
386 | ||
387 | path->ah = ah; | |
388 | ||
389 | if (ah) { | |
390 | path->pathrec = *pathrec; | |
391 | ||
392 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", | |
393 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
394 | ||
395 | while ((skb = __skb_dequeue(&path->queue))) | |
396 | __skb_queue_tail(&skqueue, skb); | |
397 | ||
398 | list_for_each_entry(neigh, &path->neigh_list, list) { | |
399 | kref_get(&path->ah->ref); | |
400 | neigh->ah = path->ah; | |
401 | ||
402 | while ((skb = __skb_dequeue(&neigh->queue))) | |
403 | __skb_queue_tail(&skqueue, skb); | |
404 | } | |
5872a9fc | 405 | } |
1da177e4 | 406 | |
5872a9fc | 407 | path->query = NULL; |
1da177e4 LT |
408 | complete(&path->done); |
409 | ||
410 | spin_unlock_irqrestore(&priv->lock, flags); | |
411 | ||
412 | while ((skb = __skb_dequeue(&skqueue))) { | |
413 | skb->dev = dev; | |
414 | if (dev_queue_xmit(skb)) | |
415 | ipoib_warn(priv, "dev_queue_xmit failed " | |
416 | "to requeue packet\n"); | |
417 | } | |
418 | } | |
419 | ||
420 | static struct ipoib_path *path_rec_create(struct net_device *dev, | |
421 | union ib_gid *gid) | |
422 | { | |
423 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
424 | struct ipoib_path *path; | |
425 | ||
21a38489 | 426 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
427 | if (!path) |
428 | return NULL; | |
429 | ||
21a38489 | 430 | path->dev = dev; |
1da177e4 LT |
431 | |
432 | skb_queue_head_init(&path->queue); | |
433 | ||
434 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 LT |
435 | |
436 | memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid)); | |
437 | path->pathrec.sgid = priv->local_gid; | |
438 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
439 | path->pathrec.numb_path = 1; | |
440 | ||
441 | return path; | |
442 | } | |
443 | ||
444 | static int path_rec_start(struct net_device *dev, | |
445 | struct ipoib_path *path) | |
446 | { | |
447 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
448 | ||
449 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", | |
450 | IPOIB_GID_ARG(path->pathrec.dgid)); | |
451 | ||
65c7edda RD |
452 | init_completion(&path->done); |
453 | ||
1da177e4 LT |
454 | path->query_id = |
455 | ib_sa_path_rec_get(priv->ca, priv->port, | |
456 | &path->pathrec, | |
457 | IB_SA_PATH_REC_DGID | | |
458 | IB_SA_PATH_REC_SGID | | |
459 | IB_SA_PATH_REC_NUMB_PATH | | |
460 | IB_SA_PATH_REC_PKEY, | |
461 | 1000, GFP_ATOMIC, | |
462 | path_rec_completion, | |
463 | path, &path->query); | |
464 | if (path->query_id < 0) { | |
465 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); | |
466 | path->query = NULL; | |
467 | return path->query_id; | |
468 | } | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
474 | { | |
475 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
476 | struct ipoib_path *path; | |
477 | struct ipoib_neigh *neigh; | |
478 | ||
479 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
480 | if (!neigh) { | |
481 | ++priv->stats.tx_dropped; | |
482 | dev_kfree_skb_any(skb); | |
483 | return; | |
484 | } | |
485 | ||
486 | skb_queue_head_init(&neigh->queue); | |
487 | neigh->neighbour = skb->dst->neighbour; | |
488 | *to_ipoib_neigh(skb->dst->neighbour) = neigh; | |
489 | ||
490 | /* | |
491 | * We can only be called from ipoib_start_xmit, so we're | |
492 | * inside tx_lock -- no need to save/restore flags. | |
493 | */ | |
494 | spin_lock(&priv->lock); | |
495 | ||
496 | path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4)); | |
497 | if (!path) { | |
498 | path = path_rec_create(dev, | |
499 | (union ib_gid *) (skb->dst->neighbour->ha + 4)); | |
500 | if (!path) | |
501 | goto err; | |
502 | ||
503 | __path_add(dev, path); | |
504 | } | |
505 | ||
506 | list_add_tail(&neigh->list, &path->neigh_list); | |
507 | ||
508 | if (path->pathrec.dlid) { | |
509 | kref_get(&path->ah->ref); | |
510 | neigh->ah = path->ah; | |
511 | ||
512 | ipoib_send(dev, skb, path->ah, | |
513 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); | |
514 | } else { | |
515 | neigh->ah = NULL; | |
516 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
517 | __skb_queue_tail(&neigh->queue, skb); | |
518 | } else { | |
519 | ++priv->stats.tx_dropped; | |
520 | dev_kfree_skb_any(skb); | |
521 | } | |
522 | ||
523 | if (!path->query && path_rec_start(dev, path)) | |
524 | goto err; | |
525 | } | |
526 | ||
527 | spin_unlock(&priv->lock); | |
528 | return; | |
529 | ||
530 | err: | |
531 | *to_ipoib_neigh(skb->dst->neighbour) = NULL; | |
532 | list_del(&neigh->list); | |
533 | neigh->neighbour->ops->destructor = NULL; | |
534 | kfree(neigh); | |
535 | ||
536 | ++priv->stats.tx_dropped; | |
537 | dev_kfree_skb_any(skb); | |
538 | ||
539 | spin_unlock(&priv->lock); | |
540 | } | |
541 | ||
d70ed607 | 542 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
543 | { |
544 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
545 | ||
546 | /* Look up path record for unicasts */ | |
547 | if (skb->dst->neighbour->ha[4] != 0xff) { | |
548 | neigh_add_path(skb, dev); | |
549 | return; | |
550 | } | |
551 | ||
552 | /* Add in the P_Key for multicasts */ | |
553 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; | |
554 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; | |
555 | ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb); | |
556 | } | |
557 | ||
558 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
559 | struct ipoib_pseudoheader *phdr) | |
560 | { | |
561 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
562 | struct ipoib_path *path; | |
563 | ||
564 | /* | |
565 | * We can only be called from ipoib_start_xmit, so we're | |
566 | * inside tx_lock -- no need to save/restore flags. | |
567 | */ | |
568 | spin_lock(&priv->lock); | |
569 | ||
570 | path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4)); | |
571 | if (!path) { | |
572 | path = path_rec_create(dev, | |
573 | (union ib_gid *) (phdr->hwaddr + 4)); | |
574 | if (path) { | |
575 | /* put pseudoheader back on for next time */ | |
576 | skb_push(skb, sizeof *phdr); | |
577 | __skb_queue_tail(&path->queue, skb); | |
578 | ||
579 | if (path_rec_start(dev, path)) { | |
580 | spin_unlock(&priv->lock); | |
581 | path_free(dev, path); | |
582 | return; | |
583 | } else | |
584 | __path_add(dev, path); | |
585 | } else { | |
586 | ++priv->stats.tx_dropped; | |
587 | dev_kfree_skb_any(skb); | |
588 | } | |
589 | ||
590 | spin_unlock(&priv->lock); | |
591 | return; | |
592 | } | |
593 | ||
594 | if (path->pathrec.dlid) { | |
595 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", | |
596 | be16_to_cpu(path->pathrec.dlid)); | |
597 | ||
598 | ipoib_send(dev, skb, path->ah, | |
599 | be32_to_cpup((__be32 *) phdr->hwaddr)); | |
600 | } else if ((path->query || !path_rec_start(dev, path)) && | |
601 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
602 | /* put pseudoheader back on for next time */ | |
603 | skb_push(skb, sizeof *phdr); | |
604 | __skb_queue_tail(&path->queue, skb); | |
605 | } else { | |
606 | ++priv->stats.tx_dropped; | |
607 | dev_kfree_skb_any(skb); | |
608 | } | |
609 | ||
610 | spin_unlock(&priv->lock); | |
611 | } | |
612 | ||
613 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
614 | { | |
615 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
616 | struct ipoib_neigh *neigh; | |
617 | unsigned long flags; | |
618 | ||
a20583a7 | 619 | if (!spin_trylock_irqsave(&priv->tx_lock, flags)) |
1da177e4 | 620 | return NETDEV_TX_LOCKED; |
1da177e4 LT |
621 | |
622 | /* | |
623 | * Check if our queue is stopped. Since we have the LLTX bit | |
624 | * set, we can't rely on netif_stop_queue() preventing our | |
625 | * xmit function from being called with a full queue. | |
626 | */ | |
627 | if (unlikely(netif_queue_stopped(dev))) { | |
628 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
629 | return NETDEV_TX_BUSY; | |
630 | } | |
631 | ||
632 | if (skb->dst && skb->dst->neighbour) { | |
633 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { | |
d70ed607 | 634 | ipoib_path_lookup(skb, dev); |
1da177e4 LT |
635 | goto out; |
636 | } | |
637 | ||
638 | neigh = *to_ipoib_neigh(skb->dst->neighbour); | |
639 | ||
640 | if (likely(neigh->ah)) { | |
641 | ipoib_send(dev, skb, neigh->ah, | |
642 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); | |
643 | goto out; | |
644 | } | |
645 | ||
646 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
647 | spin_lock(&priv->lock); | |
648 | __skb_queue_tail(&neigh->queue, skb); | |
649 | spin_unlock(&priv->lock); | |
650 | } else { | |
651 | ++priv->stats.tx_dropped; | |
652 | dev_kfree_skb_any(skb); | |
653 | } | |
654 | } else { | |
655 | struct ipoib_pseudoheader *phdr = | |
656 | (struct ipoib_pseudoheader *) skb->data; | |
657 | skb_pull(skb, sizeof *phdr); | |
658 | ||
659 | if (phdr->hwaddr[4] == 0xff) { | |
660 | /* Add in the P_Key for multicast*/ | |
661 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
662 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
663 | ||
664 | ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb); | |
665 | } else { | |
0dca0f7b | 666 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 667 | |
0dca0f7b HR |
668 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
669 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
1da177e4 LT |
670 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
671 | IPOIB_GID_FMT "\n", | |
672 | skb->dst ? "neigh" : "dst", | |
97f52eb4 SH |
673 | be16_to_cpup((__be16 *) skb->data), |
674 | be32_to_cpup((__be32 *) phdr->hwaddr), | |
1da177e4 LT |
675 | IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4))); |
676 | dev_kfree_skb_any(skb); | |
677 | ++priv->stats.tx_dropped; | |
678 | goto out; | |
679 | } | |
680 | ||
681 | unicast_arp_send(skb, dev, phdr); | |
682 | } | |
683 | } | |
684 | ||
685 | out: | |
686 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
687 | ||
688 | return NETDEV_TX_OK; | |
689 | } | |
690 | ||
691 | static struct net_device_stats *ipoib_get_stats(struct net_device *dev) | |
692 | { | |
693 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
694 | ||
695 | return &priv->stats; | |
696 | } | |
697 | ||
698 | static void ipoib_timeout(struct net_device *dev) | |
699 | { | |
700 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
701 | ||
4b2d319b RD |
702 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
703 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
704 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
705 | netif_queue_stopped(dev), | |
706 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
707 | /* XXX reset QP, etc. */ |
708 | } | |
709 | ||
710 | static int ipoib_hard_header(struct sk_buff *skb, | |
711 | struct net_device *dev, | |
712 | unsigned short type, | |
713 | void *daddr, void *saddr, unsigned len) | |
714 | { | |
715 | struct ipoib_header *header; | |
716 | ||
717 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
718 | ||
719 | header->proto = htons(type); | |
720 | header->reserved = 0; | |
721 | ||
722 | /* | |
723 | * If we don't have a neighbour structure, stuff the | |
724 | * destination address onto the front of the skb so we can | |
725 | * figure out where to send the packet later. | |
726 | */ | |
727 | if (!skb->dst || !skb->dst->neighbour) { | |
728 | struct ipoib_pseudoheader *phdr = | |
729 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
730 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
731 | } | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
736 | static void ipoib_set_mcast_list(struct net_device *dev) | |
737 | { | |
738 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
739 | ||
1ad62a19 | 740 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
741 | } |
742 | ||
743 | static void ipoib_neigh_destructor(struct neighbour *n) | |
744 | { | |
745 | struct ipoib_neigh *neigh; | |
746 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
747 | unsigned long flags; | |
748 | struct ipoib_ah *ah = NULL; | |
749 | ||
750 | ipoib_dbg(priv, | |
751 | "neigh_destructor for %06x " IPOIB_GID_FMT "\n", | |
752 | be32_to_cpup((__be32 *) n->ha), | |
753 | IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4)))); | |
754 | ||
755 | spin_lock_irqsave(&priv->lock, flags); | |
756 | ||
757 | neigh = *to_ipoib_neigh(n); | |
758 | if (neigh) { | |
759 | if (neigh->ah) | |
760 | ah = neigh->ah; | |
761 | list_del(&neigh->list); | |
762 | *to_ipoib_neigh(n) = NULL; | |
763 | kfree(neigh); | |
764 | } | |
765 | ||
766 | spin_unlock_irqrestore(&priv->lock, flags); | |
767 | ||
768 | if (ah) | |
769 | ipoib_put_ah(ah); | |
770 | } | |
771 | ||
772 | static int ipoib_neigh_setup(struct neighbour *neigh) | |
773 | { | |
774 | /* | |
775 | * Is this kosher? I can't find anybody in the kernel that | |
776 | * sets neigh->destructor, so we should be able to set it here | |
777 | * without trouble. | |
778 | */ | |
779 | neigh->ops->destructor = ipoib_neigh_destructor; | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) | |
785 | { | |
786 | parms->neigh_setup = ipoib_neigh_setup; | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
792 | { | |
793 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
794 | ||
795 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
796 | ||
de6eb66b | 797 | priv->rx_ring = kzalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_rx_buf), |
1da177e4 LT |
798 | GFP_KERNEL); |
799 | if (!priv->rx_ring) { | |
800 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
801 | ca->name, IPOIB_RX_RING_SIZE); | |
802 | goto out; | |
803 | } | |
1da177e4 | 804 | |
de6eb66b | 805 | priv->tx_ring = kzalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_tx_buf), |
1da177e4 LT |
806 | GFP_KERNEL); |
807 | if (!priv->tx_ring) { | |
808 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
809 | ca->name, IPOIB_TX_RING_SIZE); | |
810 | goto out_rx_ring_cleanup; | |
811 | } | |
1da177e4 LT |
812 | |
813 | /* priv->tx_head & tx_tail are already 0 */ | |
814 | ||
815 | if (ipoib_ib_dev_init(dev, ca, port)) | |
816 | goto out_tx_ring_cleanup; | |
817 | ||
818 | return 0; | |
819 | ||
820 | out_tx_ring_cleanup: | |
821 | kfree(priv->tx_ring); | |
822 | ||
823 | out_rx_ring_cleanup: | |
824 | kfree(priv->rx_ring); | |
825 | ||
826 | out: | |
827 | return -ENOMEM; | |
828 | } | |
829 | ||
830 | void ipoib_dev_cleanup(struct net_device *dev) | |
831 | { | |
832 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
833 | ||
1732b0ef | 834 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
835 | |
836 | /* Delete any child interfaces first */ | |
837 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
838 | unregister_netdev(cpriv->dev); | |
839 | ipoib_dev_cleanup(cpriv->dev); | |
840 | free_netdev(cpriv->dev); | |
841 | } | |
842 | ||
843 | ipoib_ib_dev_cleanup(dev); | |
844 | ||
92a6b34b HR |
845 | kfree(priv->rx_ring); |
846 | kfree(priv->tx_ring); | |
1da177e4 | 847 | |
92a6b34b HR |
848 | priv->rx_ring = NULL; |
849 | priv->tx_ring = NULL; | |
1da177e4 LT |
850 | } |
851 | ||
852 | static void ipoib_setup(struct net_device *dev) | |
853 | { | |
854 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
855 | ||
856 | dev->open = ipoib_open; | |
857 | dev->stop = ipoib_stop; | |
858 | dev->change_mtu = ipoib_change_mtu; | |
859 | dev->hard_start_xmit = ipoib_start_xmit; | |
860 | dev->get_stats = ipoib_get_stats; | |
861 | dev->tx_timeout = ipoib_timeout; | |
862 | dev->hard_header = ipoib_hard_header; | |
863 | dev->set_multicast_list = ipoib_set_mcast_list; | |
864 | dev->neigh_setup = ipoib_neigh_setup_dev; | |
865 | ||
866 | dev->watchdog_timeo = HZ; | |
867 | ||
1da177e4 LT |
868 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
869 | ||
870 | /* | |
871 | * We add in INFINIBAND_ALEN to allow for the destination | |
872 | * address "pseudoheader" for skbs without neighbour struct. | |
873 | */ | |
874 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; | |
875 | dev->addr_len = INFINIBAND_ALEN; | |
876 | dev->type = ARPHRD_INFINIBAND; | |
877 | dev->tx_queue_len = IPOIB_TX_RING_SIZE * 2; | |
878 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; | |
879 | ||
880 | /* MTU will be reset when mcast join happens */ | |
881 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; | |
882 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; | |
883 | ||
884 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); | |
885 | ||
886 | netif_carrier_off(dev); | |
887 | ||
888 | SET_MODULE_OWNER(dev); | |
889 | ||
890 | priv->dev = dev; | |
891 | ||
892 | spin_lock_init(&priv->lock); | |
893 | spin_lock_init(&priv->tx_lock); | |
894 | ||
895 | init_MUTEX(&priv->mcast_mutex); | |
896 | init_MUTEX(&priv->vlan_mutex); | |
897 | ||
898 | INIT_LIST_HEAD(&priv->path_list); | |
899 | INIT_LIST_HEAD(&priv->child_intfs); | |
900 | INIT_LIST_HEAD(&priv->dead_ahs); | |
901 | INIT_LIST_HEAD(&priv->multicast_list); | |
902 | ||
903 | INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev); | |
904 | INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev); | |
905 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev); | |
906 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev); | |
907 | INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev); | |
908 | } | |
909 | ||
910 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
911 | { | |
912 | struct net_device *dev; | |
913 | ||
914 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
915 | ipoib_setup); | |
916 | if (!dev) | |
917 | return NULL; | |
918 | ||
919 | return netdev_priv(dev); | |
920 | } | |
921 | ||
922 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
923 | { | |
924 | struct ipoib_dev_priv *priv = | |
925 | netdev_priv(container_of(cdev, struct net_device, class_dev)); | |
926 | ||
927 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
928 | } | |
929 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
930 | ||
931 | static ssize_t create_child(struct class_device *cdev, | |
932 | const char *buf, size_t count) | |
933 | { | |
934 | int pkey; | |
935 | int ret; | |
936 | ||
937 | if (sscanf(buf, "%i", &pkey) != 1) | |
938 | return -EINVAL; | |
939 | ||
940 | if (pkey < 0 || pkey > 0xffff) | |
941 | return -EINVAL; | |
942 | ||
4ce05937 RD |
943 | /* |
944 | * Set the full membership bit, so that we join the right | |
945 | * broadcast group, etc. | |
946 | */ | |
947 | pkey |= 0x8000; | |
948 | ||
1da177e4 LT |
949 | ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev), |
950 | pkey); | |
951 | ||
952 | return ret ? ret : count; | |
953 | } | |
954 | static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); | |
955 | ||
956 | static ssize_t delete_child(struct class_device *cdev, | |
957 | const char *buf, size_t count) | |
958 | { | |
959 | int pkey; | |
960 | int ret; | |
961 | ||
962 | if (sscanf(buf, "%i", &pkey) != 1) | |
963 | return -EINVAL; | |
964 | ||
965 | if (pkey < 0 || pkey > 0xffff) | |
966 | return -EINVAL; | |
967 | ||
968 | ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev), | |
969 | pkey); | |
970 | ||
971 | return ret ? ret : count; | |
972 | ||
973 | } | |
974 | static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); | |
975 | ||
976 | int ipoib_add_pkey_attr(struct net_device *dev) | |
977 | { | |
978 | return class_device_create_file(&dev->class_dev, | |
979 | &class_device_attr_pkey); | |
980 | } | |
981 | ||
982 | static struct net_device *ipoib_add_port(const char *format, | |
983 | struct ib_device *hca, u8 port) | |
984 | { | |
985 | struct ipoib_dev_priv *priv; | |
986 | int result = -ENOMEM; | |
987 | ||
988 | priv = ipoib_intf_alloc(format); | |
989 | if (!priv) | |
990 | goto alloc_mem_failed; | |
991 | ||
992 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
993 | ||
994 | result = ib_query_pkey(hca, port, 0, &priv->pkey); | |
995 | if (result) { | |
996 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
997 | hca->name, port, result); | |
998 | goto alloc_mem_failed; | |
999 | } | |
1000 | ||
4ce05937 RD |
1001 | /* |
1002 | * Set the full membership bit, so that we join the right | |
1003 | * broadcast group, etc. | |
1004 | */ | |
1005 | priv->pkey |= 0x8000; | |
1006 | ||
1da177e4 LT |
1007 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1008 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1009 | ||
1010 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1011 | if (result) { | |
1012 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1013 | hca->name, port, result); | |
1014 | goto alloc_mem_failed; | |
1015 | } else | |
1016 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1017 | ||
1018 | ||
1019 | result = ipoib_dev_init(priv->dev, hca, port); | |
1020 | if (result < 0) { | |
1021 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1022 | hca->name, port, result); | |
1023 | goto device_init_failed; | |
1024 | } | |
1025 | ||
1026 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1027 | priv->ca, ipoib_event); | |
1028 | result = ib_register_event_handler(&priv->event_handler); | |
1029 | if (result < 0) { | |
1030 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1031 | "port %d (ret = %d)\n", | |
1032 | hca->name, port, result); | |
1033 | goto event_failed; | |
1034 | } | |
1035 | ||
1036 | result = register_netdev(priv->dev); | |
1037 | if (result) { | |
1038 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1039 | hca->name, port, result); | |
1040 | goto register_failed; | |
1041 | } | |
1042 | ||
1732b0ef | 1043 | ipoib_create_debug_files(priv->dev); |
1da177e4 LT |
1044 | |
1045 | if (ipoib_add_pkey_attr(priv->dev)) | |
1046 | goto sysfs_failed; | |
1047 | if (class_device_create_file(&priv->dev->class_dev, | |
1048 | &class_device_attr_create_child)) | |
1049 | goto sysfs_failed; | |
1050 | if (class_device_create_file(&priv->dev->class_dev, | |
1051 | &class_device_attr_delete_child)) | |
1052 | goto sysfs_failed; | |
1053 | ||
1054 | return priv->dev; | |
1055 | ||
1056 | sysfs_failed: | |
1732b0ef | 1057 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1058 | unregister_netdev(priv->dev); |
1059 | ||
1060 | register_failed: | |
1061 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1062 | flush_scheduled_work(); |
1da177e4 LT |
1063 | |
1064 | event_failed: | |
1065 | ipoib_dev_cleanup(priv->dev); | |
1066 | ||
1067 | device_init_failed: | |
1068 | free_netdev(priv->dev); | |
1069 | ||
1070 | alloc_mem_failed: | |
1071 | return ERR_PTR(result); | |
1072 | } | |
1073 | ||
1074 | static void ipoib_add_one(struct ib_device *device) | |
1075 | { | |
1076 | struct list_head *dev_list; | |
1077 | struct net_device *dev; | |
1078 | struct ipoib_dev_priv *priv; | |
1079 | int s, e, p; | |
1080 | ||
1081 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); | |
1082 | if (!dev_list) | |
1083 | return; | |
1084 | ||
1085 | INIT_LIST_HEAD(dev_list); | |
1086 | ||
1087 | if (device->node_type == IB_NODE_SWITCH) { | |
1088 | s = 0; | |
1089 | e = 0; | |
1090 | } else { | |
1091 | s = 1; | |
1092 | e = device->phys_port_cnt; | |
1093 | } | |
1094 | ||
1095 | for (p = s; p <= e; ++p) { | |
1096 | dev = ipoib_add_port("ib%d", device, p); | |
1097 | if (!IS_ERR(dev)) { | |
1098 | priv = netdev_priv(dev); | |
1099 | list_add_tail(&priv->list, dev_list); | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1104 | } | |
1105 | ||
1106 | static void ipoib_remove_one(struct ib_device *device) | |
1107 | { | |
1108 | struct ipoib_dev_priv *priv, *tmp; | |
1109 | struct list_head *dev_list; | |
1110 | ||
1111 | dev_list = ib_get_client_data(device, &ipoib_client); | |
1112 | ||
1113 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1114 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1115 | flush_scheduled_work(); |
1da177e4 LT |
1116 | |
1117 | unregister_netdev(priv->dev); | |
1118 | ipoib_dev_cleanup(priv->dev); | |
1119 | free_netdev(priv->dev); | |
1120 | } | |
06c56e44 MT |
1121 | |
1122 | kfree(dev_list); | |
1da177e4 LT |
1123 | } |
1124 | ||
1125 | static int __init ipoib_init_module(void) | |
1126 | { | |
1127 | int ret; | |
1128 | ||
1129 | ret = ipoib_register_debugfs(); | |
1130 | if (ret) | |
1131 | return ret; | |
1132 | ||
1133 | /* | |
1134 | * We create our own workqueue mainly because we want to be | |
1135 | * able to flush it when devices are being removed. We can't | |
1136 | * use schedule_work()/flush_scheduled_work() because both | |
1137 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1138 | * so flush_scheduled_work() can deadlock during device | |
1139 | * removal. | |
1140 | */ | |
1141 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1142 | if (!ipoib_workqueue) { | |
1143 | ret = -ENOMEM; | |
1144 | goto err_fs; | |
1145 | } | |
1146 | ||
1147 | ret = ib_register_client(&ipoib_client); | |
1148 | if (ret) | |
1149 | goto err_wq; | |
1150 | ||
1151 | return 0; | |
1152 | ||
1da177e4 LT |
1153 | err_wq: |
1154 | destroy_workqueue(ipoib_workqueue); | |
1155 | ||
9adec1a8 RD |
1156 | err_fs: |
1157 | ipoib_unregister_debugfs(); | |
1158 | ||
1da177e4 LT |
1159 | return ret; |
1160 | } | |
1161 | ||
1162 | static void __exit ipoib_cleanup_module(void) | |
1163 | { | |
1da177e4 | 1164 | ib_unregister_client(&ipoib_client); |
9adec1a8 | 1165 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1166 | destroy_workqueue(ipoib_workqueue); |
1167 | } | |
1168 | ||
1169 | module_init(ipoib_init_module); | |
1170 | module_exit(ipoib_cleanup_module); |