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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> | |
0f485251 | 44 | #include <linux/kernel.h> |
1da177e4 LT |
45 | |
46 | #include <linux/if_arp.h> /* For ARPHRD_xxx */ | |
47 | ||
48 | #include <linux/ip.h> | |
49 | #include <linux/in.h> | |
50 | ||
14c85021 ACM |
51 | #include <net/dst.h> |
52 | ||
1da177e4 LT |
53 | MODULE_AUTHOR("Roland Dreier"); |
54 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
0f485251 SM |
57 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
58 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
59 | ||
60 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
61 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
62 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
63 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
64 | ||
1da177e4 LT |
65 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
66 | int ipoib_debug_level; | |
67 | ||
68 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
69 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
70 | #endif | |
71 | ||
1732b0ef RD |
72 | struct ipoib_path_iter { |
73 | struct net_device *dev; | |
74 | struct ipoib_path path; | |
75 | }; | |
76 | ||
1da177e4 LT |
77 | static const u8 ipv4_bcast_addr[] = { |
78 | 0x00, 0xff, 0xff, 0xff, | |
79 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
80 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
81 | }; | |
82 | ||
83 | struct workqueue_struct *ipoib_workqueue; | |
84 | ||
85 | static void ipoib_add_one(struct ib_device *device); | |
86 | static void ipoib_remove_one(struct ib_device *device); | |
87 | ||
88 | static struct ib_client ipoib_client = { | |
89 | .name = "ipoib", | |
90 | .add = ipoib_add_one, | |
91 | .remove = ipoib_remove_one | |
92 | }; | |
93 | ||
94 | int ipoib_open(struct net_device *dev) | |
95 | { | |
96 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
97 | ||
98 | ipoib_dbg(priv, "bringing up interface\n"); | |
99 | ||
100 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
101 | ||
102 | if (ipoib_pkey_dev_delay_open(dev)) | |
103 | return 0; | |
104 | ||
105 | if (ipoib_ib_dev_open(dev)) | |
106 | return -EINVAL; | |
107 | ||
267ee88e RD |
108 | if (ipoib_ib_dev_up(dev)) { |
109 | ipoib_ib_dev_stop(dev); | |
1da177e4 | 110 | return -EINVAL; |
267ee88e | 111 | } |
1da177e4 LT |
112 | |
113 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
114 | struct ipoib_dev_priv *cpriv; | |
115 | ||
116 | /* Bring up any child interfaces too */ | |
95ed644f | 117 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
118 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
119 | int flags; | |
120 | ||
121 | flags = cpriv->dev->flags; | |
122 | if (flags & IFF_UP) | |
123 | continue; | |
124 | ||
125 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
126 | } | |
95ed644f | 127 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
128 | } |
129 | ||
130 | netif_start_queue(dev); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int ipoib_stop(struct net_device *dev) | |
136 | { | |
137 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
138 | ||
139 | ipoib_dbg(priv, "stopping interface\n"); | |
140 | ||
141 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
142 | ||
143 | netif_stop_queue(dev); | |
144 | ||
0b3ea082 JM |
145 | /* |
146 | * Now flush workqueue to make sure a scheduled task doesn't | |
147 | * bring our internal state back up. | |
148 | */ | |
149 | flush_workqueue(ipoib_workqueue); | |
150 | ||
151 | ipoib_ib_dev_down(dev, 1); | |
1da177e4 LT |
152 | ipoib_ib_dev_stop(dev); |
153 | ||
154 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
155 | struct ipoib_dev_priv *cpriv; | |
156 | ||
157 | /* Bring down any child interfaces too */ | |
95ed644f | 158 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
159 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
160 | int flags; | |
161 | ||
162 | flags = cpriv->dev->flags; | |
163 | if (!(flags & IFF_UP)) | |
164 | continue; | |
165 | ||
166 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
167 | } | |
95ed644f | 168 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
169 | } |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) | |
175 | { | |
176 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
177 | ||
178 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) | |
179 | return -EINVAL; | |
180 | ||
181 | priv->admin_mtu = new_mtu; | |
182 | ||
183 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static struct ipoib_path *__path_find(struct net_device *dev, | |
189 | union ib_gid *gid) | |
190 | { | |
191 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
192 | struct rb_node *n = priv->path_tree.rb_node; | |
193 | struct ipoib_path *path; | |
194 | int ret; | |
195 | ||
196 | while (n) { | |
197 | path = rb_entry(n, struct ipoib_path, rb_node); | |
198 | ||
199 | ret = memcmp(gid->raw, path->pathrec.dgid.raw, | |
200 | sizeof (union ib_gid)); | |
201 | ||
202 | if (ret < 0) | |
203 | n = n->rb_left; | |
204 | else if (ret > 0) | |
205 | n = n->rb_right; | |
206 | else | |
207 | return path; | |
208 | } | |
209 | ||
210 | return NULL; | |
211 | } | |
212 | ||
213 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
214 | { | |
215 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
216 | struct rb_node **n = &priv->path_tree.rb_node; | |
217 | struct rb_node *pn = NULL; | |
218 | struct ipoib_path *tpath; | |
219 | int ret; | |
220 | ||
221 | while (*n) { | |
222 | pn = *n; | |
223 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
224 | ||
225 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
226 | sizeof (union ib_gid)); | |
227 | if (ret < 0) | |
228 | n = &pn->rb_left; | |
229 | else if (ret > 0) | |
230 | n = &pn->rb_right; | |
231 | else | |
232 | return -EEXIST; | |
233 | } | |
234 | ||
235 | rb_link_node(&path->rb_node, pn, n); | |
236 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
237 | ||
238 | list_add_tail(&path->list, &priv->path_list); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
244 | { | |
245 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
246 | struct ipoib_neigh *neigh, *tn; | |
247 | struct sk_buff *skb; | |
248 | unsigned long flags; | |
249 | ||
250 | while ((skb = __skb_dequeue(&path->queue))) | |
251 | dev_kfree_skb_irq(skb); | |
252 | ||
253 | spin_lock_irqsave(&priv->lock, flags); | |
254 | ||
255 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
256 | /* | |
257 | * It's safe to call ipoib_put_ah() inside priv->lock | |
258 | * here, because we know that path->ah will always | |
259 | * hold one more reference, so ipoib_put_ah() will | |
260 | * never do more than decrement the ref count. | |
261 | */ | |
262 | if (neigh->ah) | |
263 | ipoib_put_ah(neigh->ah); | |
d2e0655e MT |
264 | |
265 | ipoib_neigh_free(neigh); | |
1da177e4 LT |
266 | } |
267 | ||
268 | spin_unlock_irqrestore(&priv->lock, flags); | |
269 | ||
270 | if (path->ah) | |
271 | ipoib_put_ah(path->ah); | |
272 | ||
273 | kfree(path); | |
274 | } | |
275 | ||
1732b0ef RD |
276 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
277 | ||
278 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
279 | { | |
280 | struct ipoib_path_iter *iter; | |
281 | ||
282 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
283 | if (!iter) | |
284 | return NULL; | |
285 | ||
286 | iter->dev = dev; | |
287 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
288 | ||
289 | if (ipoib_path_iter_next(iter)) { | |
290 | kfree(iter); | |
291 | return NULL; | |
292 | } | |
293 | ||
294 | return iter; | |
295 | } | |
296 | ||
297 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
298 | { | |
299 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
300 | struct rb_node *n; | |
301 | struct ipoib_path *path; | |
302 | int ret = 1; | |
303 | ||
304 | spin_lock_irq(&priv->lock); | |
305 | ||
306 | n = rb_first(&priv->path_tree); | |
307 | ||
308 | while (n) { | |
309 | path = rb_entry(n, struct ipoib_path, rb_node); | |
310 | ||
311 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
312 | sizeof (union ib_gid)) < 0) { | |
313 | iter->path = *path; | |
314 | ret = 0; | |
315 | break; | |
316 | } | |
317 | ||
318 | n = rb_next(n); | |
319 | } | |
320 | ||
321 | spin_unlock_irq(&priv->lock); | |
322 | ||
323 | return ret; | |
324 | } | |
325 | ||
326 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
327 | struct ipoib_path *path) | |
328 | { | |
329 | *path = iter->path; | |
330 | } | |
331 | ||
332 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
333 | ||
1da177e4 LT |
334 | void ipoib_flush_paths(struct net_device *dev) |
335 | { | |
336 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
337 | struct ipoib_path *path, *tp; | |
338 | LIST_HEAD(remove_list); | |
1da177e4 | 339 | |
f697f74a | 340 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
341 | |
342 | list_splice(&priv->path_list, &remove_list); | |
343 | INIT_LIST_HEAD(&priv->path_list); | |
344 | ||
345 | list_for_each_entry(path, &remove_list, list) | |
346 | rb_erase(&path->rb_node, &priv->path_tree); | |
347 | ||
1da177e4 LT |
348 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
349 | if (path->query) | |
350 | ib_sa_cancel_query(path->query_id, path->query); | |
f697f74a | 351 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
352 | wait_for_completion(&path->done); |
353 | path_free(dev, path); | |
f697f74a | 354 | spin_lock_irq(&priv->lock); |
1da177e4 | 355 | } |
f697f74a | 356 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
357 | } |
358 | ||
359 | static void path_rec_completion(int status, | |
360 | struct ib_sa_path_rec *pathrec, | |
361 | void *path_ptr) | |
362 | { | |
363 | struct ipoib_path *path = path_ptr; | |
364 | struct net_device *dev = path->dev; | |
365 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
366 | struct ipoib_ah *ah = NULL; | |
367 | struct ipoib_neigh *neigh; | |
368 | struct sk_buff_head skqueue; | |
369 | struct sk_buff *skb; | |
370 | unsigned long flags; | |
371 | ||
372 | if (pathrec) | |
373 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", | |
374 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); | |
375 | else | |
376 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", | |
377 | status, IPOIB_GID_ARG(path->pathrec.dgid)); | |
378 | ||
379 | skb_queue_head_init(&skqueue); | |
380 | ||
381 | if (!status) { | |
382 | struct ib_ah_attr av = { | |
383 | .dlid = be16_to_cpu(pathrec->dlid), | |
384 | .sl = pathrec->sl, | |
bf6a9e31 JM |
385 | .port_num = priv->port, |
386 | .static_rate = pathrec->rate | |
1da177e4 | 387 | }; |
1da177e4 LT |
388 | |
389 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
390 | } | |
391 | ||
392 | spin_lock_irqsave(&priv->lock, flags); | |
393 | ||
394 | path->ah = ah; | |
395 | ||
396 | if (ah) { | |
397 | path->pathrec = *pathrec; | |
398 | ||
399 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", | |
400 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
401 | ||
402 | while ((skb = __skb_dequeue(&path->queue))) | |
403 | __skb_queue_tail(&skqueue, skb); | |
404 | ||
405 | list_for_each_entry(neigh, &path->neigh_list, list) { | |
406 | kref_get(&path->ah->ref); | |
407 | neigh->ah = path->ah; | |
408 | ||
409 | while ((skb = __skb_dequeue(&neigh->queue))) | |
410 | __skb_queue_tail(&skqueue, skb); | |
411 | } | |
5872a9fc | 412 | } |
1da177e4 | 413 | |
5872a9fc | 414 | path->query = NULL; |
1da177e4 LT |
415 | complete(&path->done); |
416 | ||
417 | spin_unlock_irqrestore(&priv->lock, flags); | |
418 | ||
419 | while ((skb = __skb_dequeue(&skqueue))) { | |
420 | skb->dev = dev; | |
421 | if (dev_queue_xmit(skb)) | |
422 | ipoib_warn(priv, "dev_queue_xmit failed " | |
423 | "to requeue packet\n"); | |
424 | } | |
425 | } | |
426 | ||
427 | static struct ipoib_path *path_rec_create(struct net_device *dev, | |
428 | union ib_gid *gid) | |
429 | { | |
430 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
431 | struct ipoib_path *path; | |
432 | ||
21a38489 | 433 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
434 | if (!path) |
435 | return NULL; | |
436 | ||
21a38489 | 437 | path->dev = dev; |
1da177e4 LT |
438 | |
439 | skb_queue_head_init(&path->queue); | |
440 | ||
441 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 LT |
442 | |
443 | memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid)); | |
444 | path->pathrec.sgid = priv->local_gid; | |
445 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
446 | path->pathrec.numb_path = 1; | |
447 | ||
448 | return path; | |
449 | } | |
450 | ||
451 | static int path_rec_start(struct net_device *dev, | |
452 | struct ipoib_path *path) | |
453 | { | |
454 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
455 | ||
456 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", | |
457 | IPOIB_GID_ARG(path->pathrec.dgid)); | |
458 | ||
65c7edda RD |
459 | init_completion(&path->done); |
460 | ||
1da177e4 LT |
461 | path->query_id = |
462 | ib_sa_path_rec_get(priv->ca, priv->port, | |
463 | &path->pathrec, | |
464 | IB_SA_PATH_REC_DGID | | |
465 | IB_SA_PATH_REC_SGID | | |
466 | IB_SA_PATH_REC_NUMB_PATH | | |
467 | IB_SA_PATH_REC_PKEY, | |
468 | 1000, GFP_ATOMIC, | |
469 | path_rec_completion, | |
470 | path, &path->query); | |
471 | if (path->query_id < 0) { | |
472 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); | |
473 | path->query = NULL; | |
474 | return path->query_id; | |
475 | } | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
481 | { | |
482 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
483 | struct ipoib_path *path; | |
484 | struct ipoib_neigh *neigh; | |
485 | ||
d2e0655e | 486 | neigh = ipoib_neigh_alloc(skb->dst->neighbour); |
1da177e4 LT |
487 | if (!neigh) { |
488 | ++priv->stats.tx_dropped; | |
489 | dev_kfree_skb_any(skb); | |
490 | return; | |
491 | } | |
492 | ||
493 | skb_queue_head_init(&neigh->queue); | |
1da177e4 LT |
494 | |
495 | /* | |
496 | * We can only be called from ipoib_start_xmit, so we're | |
497 | * inside tx_lock -- no need to save/restore flags. | |
498 | */ | |
499 | spin_lock(&priv->lock); | |
500 | ||
501 | path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4)); | |
502 | if (!path) { | |
503 | path = path_rec_create(dev, | |
504 | (union ib_gid *) (skb->dst->neighbour->ha + 4)); | |
505 | if (!path) | |
d2e0655e | 506 | goto err_path; |
1da177e4 LT |
507 | |
508 | __path_add(dev, path); | |
509 | } | |
510 | ||
511 | list_add_tail(&neigh->list, &path->neigh_list); | |
512 | ||
47f7a071 | 513 | if (path->ah) { |
1da177e4 LT |
514 | kref_get(&path->ah->ref); |
515 | neigh->ah = path->ah; | |
516 | ||
517 | ipoib_send(dev, skb, path->ah, | |
518 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); | |
519 | } else { | |
520 | neigh->ah = NULL; | |
bfef73fa | 521 | __skb_queue_tail(&neigh->queue, skb); |
1da177e4 LT |
522 | |
523 | if (!path->query && path_rec_start(dev, path)) | |
d2e0655e | 524 | goto err_list; |
1da177e4 LT |
525 | } |
526 | ||
527 | spin_unlock(&priv->lock); | |
528 | return; | |
529 | ||
d2e0655e | 530 | err_list: |
1da177e4 | 531 | list_del(&neigh->list); |
1da177e4 | 532 | |
d2e0655e MT |
533 | err_path: |
534 | ipoib_neigh_free(neigh); | |
1da177e4 LT |
535 | ++priv->stats.tx_dropped; |
536 | dev_kfree_skb_any(skb); | |
537 | ||
538 | spin_unlock(&priv->lock); | |
539 | } | |
540 | ||
d70ed607 | 541 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
542 | { |
543 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
544 | ||
545 | /* Look up path record for unicasts */ | |
546 | if (skb->dst->neighbour->ha[4] != 0xff) { | |
547 | neigh_add_path(skb, dev); | |
548 | return; | |
549 | } | |
550 | ||
551 | /* Add in the P_Key for multicasts */ | |
552 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; | |
553 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; | |
554 | ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb); | |
555 | } | |
556 | ||
557 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
558 | struct ipoib_pseudoheader *phdr) | |
559 | { | |
560 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
561 | struct ipoib_path *path; | |
562 | ||
563 | /* | |
564 | * We can only be called from ipoib_start_xmit, so we're | |
565 | * inside tx_lock -- no need to save/restore flags. | |
566 | */ | |
567 | spin_lock(&priv->lock); | |
568 | ||
569 | path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4)); | |
570 | if (!path) { | |
571 | path = path_rec_create(dev, | |
572 | (union ib_gid *) (phdr->hwaddr + 4)); | |
573 | if (path) { | |
574 | /* put pseudoheader back on for next time */ | |
575 | skb_push(skb, sizeof *phdr); | |
576 | __skb_queue_tail(&path->queue, skb); | |
577 | ||
578 | if (path_rec_start(dev, path)) { | |
579 | spin_unlock(&priv->lock); | |
580 | path_free(dev, path); | |
581 | return; | |
582 | } else | |
583 | __path_add(dev, path); | |
584 | } else { | |
585 | ++priv->stats.tx_dropped; | |
586 | dev_kfree_skb_any(skb); | |
587 | } | |
588 | ||
589 | spin_unlock(&priv->lock); | |
590 | return; | |
591 | } | |
592 | ||
47f7a071 | 593 | if (path->ah) { |
1da177e4 LT |
594 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
595 | be16_to_cpu(path->pathrec.dlid)); | |
596 | ||
597 | ipoib_send(dev, skb, path->ah, | |
598 | be32_to_cpup((__be32 *) phdr->hwaddr)); | |
599 | } else if ((path->query || !path_rec_start(dev, path)) && | |
600 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
601 | /* put pseudoheader back on for next time */ | |
602 | skb_push(skb, sizeof *phdr); | |
603 | __skb_queue_tail(&path->queue, skb); | |
604 | } else { | |
605 | ++priv->stats.tx_dropped; | |
606 | dev_kfree_skb_any(skb); | |
607 | } | |
608 | ||
609 | spin_unlock(&priv->lock); | |
610 | } | |
611 | ||
612 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
613 | { | |
614 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
615 | struct ipoib_neigh *neigh; | |
616 | unsigned long flags; | |
617 | ||
a20583a7 | 618 | if (!spin_trylock_irqsave(&priv->tx_lock, flags)) |
1da177e4 | 619 | return NETDEV_TX_LOCKED; |
1da177e4 LT |
620 | |
621 | /* | |
622 | * Check if our queue is stopped. Since we have the LLTX bit | |
623 | * set, we can't rely on netif_stop_queue() preventing our | |
624 | * xmit function from being called with a full queue. | |
625 | */ | |
626 | if (unlikely(netif_queue_stopped(dev))) { | |
627 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
628 | return NETDEV_TX_BUSY; | |
629 | } | |
630 | ||
631 | if (skb->dst && skb->dst->neighbour) { | |
632 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { | |
d70ed607 | 633 | ipoib_path_lookup(skb, dev); |
1da177e4 LT |
634 | goto out; |
635 | } | |
636 | ||
637 | neigh = *to_ipoib_neigh(skb->dst->neighbour); | |
638 | ||
639 | if (likely(neigh->ah)) { | |
640 | ipoib_send(dev, skb, neigh->ah, | |
641 | be32_to_cpup((__be32 *) skb->dst->neighbour->ha)); | |
642 | goto out; | |
643 | } | |
644 | ||
645 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
646 | spin_lock(&priv->lock); | |
647 | __skb_queue_tail(&neigh->queue, skb); | |
648 | spin_unlock(&priv->lock); | |
649 | } else { | |
650 | ++priv->stats.tx_dropped; | |
651 | dev_kfree_skb_any(skb); | |
652 | } | |
653 | } else { | |
654 | struct ipoib_pseudoheader *phdr = | |
655 | (struct ipoib_pseudoheader *) skb->data; | |
656 | skb_pull(skb, sizeof *phdr); | |
657 | ||
658 | if (phdr->hwaddr[4] == 0xff) { | |
659 | /* Add in the P_Key for multicast*/ | |
660 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
661 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
662 | ||
663 | ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb); | |
664 | } else { | |
0dca0f7b | 665 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 666 | |
0dca0f7b HR |
667 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
668 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
1da177e4 LT |
669 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
670 | IPOIB_GID_FMT "\n", | |
671 | skb->dst ? "neigh" : "dst", | |
97f52eb4 SH |
672 | be16_to_cpup((__be16 *) skb->data), |
673 | be32_to_cpup((__be32 *) phdr->hwaddr), | |
1da177e4 LT |
674 | IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4))); |
675 | dev_kfree_skb_any(skb); | |
676 | ++priv->stats.tx_dropped; | |
677 | goto out; | |
678 | } | |
679 | ||
680 | unicast_arp_send(skb, dev, phdr); | |
681 | } | |
682 | } | |
683 | ||
684 | out: | |
685 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
686 | ||
687 | return NETDEV_TX_OK; | |
688 | } | |
689 | ||
690 | static struct net_device_stats *ipoib_get_stats(struct net_device *dev) | |
691 | { | |
692 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
693 | ||
694 | return &priv->stats; | |
695 | } | |
696 | ||
697 | static void ipoib_timeout(struct net_device *dev) | |
698 | { | |
699 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
700 | ||
4b2d319b RD |
701 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
702 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
703 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
704 | netif_queue_stopped(dev), | |
705 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
706 | /* XXX reset QP, etc. */ |
707 | } | |
708 | ||
709 | static int ipoib_hard_header(struct sk_buff *skb, | |
710 | struct net_device *dev, | |
711 | unsigned short type, | |
712 | void *daddr, void *saddr, unsigned len) | |
713 | { | |
714 | struct ipoib_header *header; | |
715 | ||
716 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
717 | ||
718 | header->proto = htons(type); | |
719 | header->reserved = 0; | |
720 | ||
721 | /* | |
722 | * If we don't have a neighbour structure, stuff the | |
723 | * destination address onto the front of the skb so we can | |
724 | * figure out where to send the packet later. | |
725 | */ | |
ef12d456 | 726 | if ((!skb->dst || !skb->dst->neighbour) && daddr) { |
1da177e4 LT |
727 | struct ipoib_pseudoheader *phdr = |
728 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
729 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
730 | } | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
735 | static void ipoib_set_mcast_list(struct net_device *dev) | |
736 | { | |
737 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
738 | ||
7a343d4c LA |
739 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
740 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
741 | return; | |
742 | } | |
743 | ||
1ad62a19 | 744 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
745 | } |
746 | ||
747 | static void ipoib_neigh_destructor(struct neighbour *n) | |
748 | { | |
749 | struct ipoib_neigh *neigh; | |
750 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
751 | unsigned long flags; | |
752 | struct ipoib_ah *ah = NULL; | |
753 | ||
754 | ipoib_dbg(priv, | |
755 | "neigh_destructor for %06x " IPOIB_GID_FMT "\n", | |
756 | be32_to_cpup((__be32 *) n->ha), | |
757 | IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4)))); | |
758 | ||
759 | spin_lock_irqsave(&priv->lock, flags); | |
760 | ||
761 | neigh = *to_ipoib_neigh(n); | |
762 | if (neigh) { | |
763 | if (neigh->ah) | |
764 | ah = neigh->ah; | |
765 | list_del(&neigh->list); | |
d2e0655e | 766 | ipoib_neigh_free(neigh); |
1da177e4 LT |
767 | } |
768 | ||
769 | spin_unlock_irqrestore(&priv->lock, flags); | |
770 | ||
771 | if (ah) | |
772 | ipoib_put_ah(ah); | |
773 | } | |
774 | ||
d2e0655e MT |
775 | struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour) |
776 | { | |
777 | struct ipoib_neigh *neigh; | |
778 | ||
779 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
780 | if (!neigh) | |
781 | return NULL; | |
782 | ||
783 | neigh->neighbour = neighbour; | |
784 | *to_ipoib_neigh(neighbour) = neigh; | |
785 | ||
786 | return neigh; | |
787 | } | |
788 | ||
789 | void ipoib_neigh_free(struct ipoib_neigh *neigh) | |
790 | { | |
791 | *to_ipoib_neigh(neigh->neighbour) = NULL; | |
792 | kfree(neigh); | |
793 | } | |
794 | ||
1da177e4 LT |
795 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
796 | { | |
c5ecd62c | 797 | parms->neigh_destructor = ipoib_neigh_destructor; |
1da177e4 LT |
798 | |
799 | return 0; | |
800 | } | |
801 | ||
802 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
803 | { | |
804 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
805 | ||
806 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 807 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
808 | GFP_KERNEL); |
809 | if (!priv->rx_ring) { | |
810 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 811 | ca->name, ipoib_recvq_size); |
1da177e4 LT |
812 | goto out; |
813 | } | |
1da177e4 | 814 | |
0f485251 | 815 | priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, |
1da177e4 LT |
816 | GFP_KERNEL); |
817 | if (!priv->tx_ring) { | |
818 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 819 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
820 | goto out_rx_ring_cleanup; |
821 | } | |
1da177e4 LT |
822 | |
823 | /* priv->tx_head & tx_tail are already 0 */ | |
824 | ||
825 | if (ipoib_ib_dev_init(dev, ca, port)) | |
826 | goto out_tx_ring_cleanup; | |
827 | ||
828 | return 0; | |
829 | ||
830 | out_tx_ring_cleanup: | |
831 | kfree(priv->tx_ring); | |
832 | ||
833 | out_rx_ring_cleanup: | |
834 | kfree(priv->rx_ring); | |
835 | ||
836 | out: | |
837 | return -ENOMEM; | |
838 | } | |
839 | ||
840 | void ipoib_dev_cleanup(struct net_device *dev) | |
841 | { | |
842 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
843 | ||
1732b0ef | 844 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
845 | |
846 | /* Delete any child interfaces first */ | |
847 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
848 | unregister_netdev(cpriv->dev); | |
849 | ipoib_dev_cleanup(cpriv->dev); | |
850 | free_netdev(cpriv->dev); | |
851 | } | |
852 | ||
853 | ipoib_ib_dev_cleanup(dev); | |
854 | ||
92a6b34b HR |
855 | kfree(priv->rx_ring); |
856 | kfree(priv->tx_ring); | |
1da177e4 | 857 | |
92a6b34b HR |
858 | priv->rx_ring = NULL; |
859 | priv->tx_ring = NULL; | |
1da177e4 LT |
860 | } |
861 | ||
862 | static void ipoib_setup(struct net_device *dev) | |
863 | { | |
864 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
865 | ||
866 | dev->open = ipoib_open; | |
867 | dev->stop = ipoib_stop; | |
868 | dev->change_mtu = ipoib_change_mtu; | |
869 | dev->hard_start_xmit = ipoib_start_xmit; | |
870 | dev->get_stats = ipoib_get_stats; | |
871 | dev->tx_timeout = ipoib_timeout; | |
872 | dev->hard_header = ipoib_hard_header; | |
873 | dev->set_multicast_list = ipoib_set_mcast_list; | |
874 | dev->neigh_setup = ipoib_neigh_setup_dev; | |
875 | ||
876 | dev->watchdog_timeo = HZ; | |
877 | ||
1da177e4 LT |
878 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
879 | ||
880 | /* | |
881 | * We add in INFINIBAND_ALEN to allow for the destination | |
882 | * address "pseudoheader" for skbs without neighbour struct. | |
883 | */ | |
884 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; | |
885 | dev->addr_len = INFINIBAND_ALEN; | |
886 | dev->type = ARPHRD_INFINIBAND; | |
0f485251 | 887 | dev->tx_queue_len = ipoib_sendq_size * 2; |
1da177e4 LT |
888 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; |
889 | ||
890 | /* MTU will be reset when mcast join happens */ | |
891 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; | |
892 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; | |
893 | ||
894 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); | |
895 | ||
896 | netif_carrier_off(dev); | |
897 | ||
898 | SET_MODULE_OWNER(dev); | |
899 | ||
900 | priv->dev = dev; | |
901 | ||
902 | spin_lock_init(&priv->lock); | |
903 | spin_lock_init(&priv->tx_lock); | |
904 | ||
95ed644f IM |
905 | mutex_init(&priv->mcast_mutex); |
906 | mutex_init(&priv->vlan_mutex); | |
1da177e4 LT |
907 | |
908 | INIT_LIST_HEAD(&priv->path_list); | |
909 | INIT_LIST_HEAD(&priv->child_intfs); | |
910 | INIT_LIST_HEAD(&priv->dead_ahs); | |
911 | INIT_LIST_HEAD(&priv->multicast_list); | |
912 | ||
913 | INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev); | |
914 | INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev); | |
915 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev); | |
916 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev); | |
917 | INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev); | |
918 | } | |
919 | ||
920 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
921 | { | |
922 | struct net_device *dev; | |
923 | ||
924 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
925 | ipoib_setup); | |
926 | if (!dev) | |
927 | return NULL; | |
928 | ||
929 | return netdev_priv(dev); | |
930 | } | |
931 | ||
932 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
933 | { | |
934 | struct ipoib_dev_priv *priv = | |
935 | netdev_priv(container_of(cdev, struct net_device, class_dev)); | |
936 | ||
937 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
938 | } | |
939 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
940 | ||
941 | static ssize_t create_child(struct class_device *cdev, | |
942 | const char *buf, size_t count) | |
943 | { | |
944 | int pkey; | |
945 | int ret; | |
946 | ||
947 | if (sscanf(buf, "%i", &pkey) != 1) | |
948 | return -EINVAL; | |
949 | ||
950 | if (pkey < 0 || pkey > 0xffff) | |
951 | return -EINVAL; | |
952 | ||
4ce05937 RD |
953 | /* |
954 | * Set the full membership bit, so that we join the right | |
955 | * broadcast group, etc. | |
956 | */ | |
957 | pkey |= 0x8000; | |
958 | ||
1da177e4 LT |
959 | ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev), |
960 | pkey); | |
961 | ||
962 | return ret ? ret : count; | |
963 | } | |
964 | static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); | |
965 | ||
966 | static ssize_t delete_child(struct class_device *cdev, | |
967 | const char *buf, size_t count) | |
968 | { | |
969 | int pkey; | |
970 | int ret; | |
971 | ||
972 | if (sscanf(buf, "%i", &pkey) != 1) | |
973 | return -EINVAL; | |
974 | ||
975 | if (pkey < 0 || pkey > 0xffff) | |
976 | return -EINVAL; | |
977 | ||
978 | ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev), | |
979 | pkey); | |
980 | ||
981 | return ret ? ret : count; | |
982 | ||
983 | } | |
984 | static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); | |
985 | ||
986 | int ipoib_add_pkey_attr(struct net_device *dev) | |
987 | { | |
988 | return class_device_create_file(&dev->class_dev, | |
989 | &class_device_attr_pkey); | |
990 | } | |
991 | ||
992 | static struct net_device *ipoib_add_port(const char *format, | |
993 | struct ib_device *hca, u8 port) | |
994 | { | |
995 | struct ipoib_dev_priv *priv; | |
996 | int result = -ENOMEM; | |
997 | ||
998 | priv = ipoib_intf_alloc(format); | |
999 | if (!priv) | |
1000 | goto alloc_mem_failed; | |
1001 | ||
1002 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
1003 | ||
1004 | result = ib_query_pkey(hca, port, 0, &priv->pkey); | |
1005 | if (result) { | |
1006 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1007 | hca->name, port, result); | |
1008 | goto alloc_mem_failed; | |
1009 | } | |
1010 | ||
4ce05937 RD |
1011 | /* |
1012 | * Set the full membership bit, so that we join the right | |
1013 | * broadcast group, etc. | |
1014 | */ | |
1015 | priv->pkey |= 0x8000; | |
1016 | ||
1da177e4 LT |
1017 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1018 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1019 | ||
1020 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1021 | if (result) { | |
1022 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1023 | hca->name, port, result); | |
1024 | goto alloc_mem_failed; | |
1025 | } else | |
1026 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1027 | ||
1028 | ||
1029 | result = ipoib_dev_init(priv->dev, hca, port); | |
1030 | if (result < 0) { | |
1031 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1032 | hca->name, port, result); | |
1033 | goto device_init_failed; | |
1034 | } | |
1035 | ||
1036 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1037 | priv->ca, ipoib_event); | |
1038 | result = ib_register_event_handler(&priv->event_handler); | |
1039 | if (result < 0) { | |
1040 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1041 | "port %d (ret = %d)\n", | |
1042 | hca->name, port, result); | |
1043 | goto event_failed; | |
1044 | } | |
1045 | ||
1046 | result = register_netdev(priv->dev); | |
1047 | if (result) { | |
1048 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1049 | hca->name, port, result); | |
1050 | goto register_failed; | |
1051 | } | |
1052 | ||
1732b0ef | 1053 | ipoib_create_debug_files(priv->dev); |
1da177e4 LT |
1054 | |
1055 | if (ipoib_add_pkey_attr(priv->dev)) | |
1056 | goto sysfs_failed; | |
1057 | if (class_device_create_file(&priv->dev->class_dev, | |
1058 | &class_device_attr_create_child)) | |
1059 | goto sysfs_failed; | |
1060 | if (class_device_create_file(&priv->dev->class_dev, | |
1061 | &class_device_attr_delete_child)) | |
1062 | goto sysfs_failed; | |
1063 | ||
1064 | return priv->dev; | |
1065 | ||
1066 | sysfs_failed: | |
1732b0ef | 1067 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1068 | unregister_netdev(priv->dev); |
1069 | ||
1070 | register_failed: | |
1071 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1072 | flush_scheduled_work(); |
1da177e4 LT |
1073 | |
1074 | event_failed: | |
1075 | ipoib_dev_cleanup(priv->dev); | |
1076 | ||
1077 | device_init_failed: | |
1078 | free_netdev(priv->dev); | |
1079 | ||
1080 | alloc_mem_failed: | |
1081 | return ERR_PTR(result); | |
1082 | } | |
1083 | ||
1084 | static void ipoib_add_one(struct ib_device *device) | |
1085 | { | |
1086 | struct list_head *dev_list; | |
1087 | struct net_device *dev; | |
1088 | struct ipoib_dev_priv *priv; | |
1089 | int s, e, p; | |
1090 | ||
1091 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); | |
1092 | if (!dev_list) | |
1093 | return; | |
1094 | ||
1095 | INIT_LIST_HEAD(dev_list); | |
1096 | ||
1097 | if (device->node_type == IB_NODE_SWITCH) { | |
1098 | s = 0; | |
1099 | e = 0; | |
1100 | } else { | |
1101 | s = 1; | |
1102 | e = device->phys_port_cnt; | |
1103 | } | |
1104 | ||
1105 | for (p = s; p <= e; ++p) { | |
1106 | dev = ipoib_add_port("ib%d", device, p); | |
1107 | if (!IS_ERR(dev)) { | |
1108 | priv = netdev_priv(dev); | |
1109 | list_add_tail(&priv->list, dev_list); | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1114 | } | |
1115 | ||
1116 | static void ipoib_remove_one(struct ib_device *device) | |
1117 | { | |
1118 | struct ipoib_dev_priv *priv, *tmp; | |
1119 | struct list_head *dev_list; | |
1120 | ||
1121 | dev_list = ib_get_client_data(device, &ipoib_client); | |
1122 | ||
1123 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1124 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1125 | flush_scheduled_work(); |
1da177e4 LT |
1126 | |
1127 | unregister_netdev(priv->dev); | |
1128 | ipoib_dev_cleanup(priv->dev); | |
1129 | free_netdev(priv->dev); | |
1130 | } | |
06c56e44 MT |
1131 | |
1132 | kfree(dev_list); | |
1da177e4 LT |
1133 | } |
1134 | ||
1135 | static int __init ipoib_init_module(void) | |
1136 | { | |
1137 | int ret; | |
1138 | ||
0f485251 SM |
1139 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1140 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1141 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1142 | ||
1143 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1144 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
1145 | ipoib_sendq_size = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE); | |
1146 | ||
1da177e4 LT |
1147 | ret = ipoib_register_debugfs(); |
1148 | if (ret) | |
1149 | return ret; | |
1150 | ||
1151 | /* | |
1152 | * We create our own workqueue mainly because we want to be | |
1153 | * able to flush it when devices are being removed. We can't | |
1154 | * use schedule_work()/flush_scheduled_work() because both | |
1155 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1156 | * so flush_scheduled_work() can deadlock during device | |
1157 | * removal. | |
1158 | */ | |
1159 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1160 | if (!ipoib_workqueue) { | |
1161 | ret = -ENOMEM; | |
1162 | goto err_fs; | |
1163 | } | |
1164 | ||
1165 | ret = ib_register_client(&ipoib_client); | |
1166 | if (ret) | |
1167 | goto err_wq; | |
1168 | ||
1169 | return 0; | |
1170 | ||
1da177e4 LT |
1171 | err_wq: |
1172 | destroy_workqueue(ipoib_workqueue); | |
1173 | ||
9adec1a8 RD |
1174 | err_fs: |
1175 | ipoib_unregister_debugfs(); | |
1176 | ||
1da177e4 LT |
1177 | return ret; |
1178 | } | |
1179 | ||
1180 | static void __exit ipoib_cleanup_module(void) | |
1181 | { | |
1da177e4 | 1182 | ib_unregister_client(&ipoib_client); |
9adec1a8 | 1183 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1184 | destroy_workqueue(ipoib_workqueue); |
1185 | } | |
1186 | ||
1187 | module_init(ipoib_init_module); | |
1188 | module_exit(ipoib_cleanup_module); |