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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> | |
0f485251 | 43 | #include <linux/kernel.h> |
1da177e4 LT |
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 | ||
073ae841 MT |
52 | #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff) |
53 | ||
1da177e4 LT |
54 | MODULE_AUTHOR("Roland Dreier"); |
55 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
56 | MODULE_LICENSE("Dual BSD/GPL"); | |
57 | ||
0f485251 SM |
58 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
59 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
60 | ||
61 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
62 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
63 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
64 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
65 | ||
1da177e4 LT |
66 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
67 | int ipoib_debug_level; | |
68 | ||
69 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
70 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
71 | #endif | |
72 | ||
1732b0ef RD |
73 | struct ipoib_path_iter { |
74 | struct net_device *dev; | |
75 | struct ipoib_path path; | |
76 | }; | |
77 | ||
1da177e4 LT |
78 | static const u8 ipv4_bcast_addr[] = { |
79 | 0x00, 0xff, 0xff, 0xff, | |
80 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
81 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
82 | }; | |
83 | ||
84 | struct workqueue_struct *ipoib_workqueue; | |
85 | ||
c1a0b23b MT |
86 | struct ib_sa_client ipoib_sa_client; |
87 | ||
1da177e4 LT |
88 | static void ipoib_add_one(struct ib_device *device); |
89 | static void ipoib_remove_one(struct ib_device *device); | |
90 | ||
91 | static struct ib_client ipoib_client = { | |
92 | .name = "ipoib", | |
93 | .add = ipoib_add_one, | |
94 | .remove = ipoib_remove_one | |
95 | }; | |
96 | ||
97 | int ipoib_open(struct net_device *dev) | |
98 | { | |
99 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
100 | ||
101 | ipoib_dbg(priv, "bringing up interface\n"); | |
102 | ||
103 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
104 | ||
105 | if (ipoib_pkey_dev_delay_open(dev)) | |
106 | return 0; | |
107 | ||
108 | if (ipoib_ib_dev_open(dev)) | |
109 | return -EINVAL; | |
110 | ||
267ee88e RD |
111 | if (ipoib_ib_dev_up(dev)) { |
112 | ipoib_ib_dev_stop(dev); | |
1da177e4 | 113 | return -EINVAL; |
267ee88e | 114 | } |
1da177e4 LT |
115 | |
116 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
117 | struct ipoib_dev_priv *cpriv; | |
118 | ||
119 | /* Bring up any child interfaces too */ | |
95ed644f | 120 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
121 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
122 | int flags; | |
123 | ||
124 | flags = cpriv->dev->flags; | |
125 | if (flags & IFF_UP) | |
126 | continue; | |
127 | ||
128 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
129 | } | |
95ed644f | 130 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
131 | } |
132 | ||
133 | netif_start_queue(dev); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static int ipoib_stop(struct net_device *dev) | |
139 | { | |
140 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
141 | ||
142 | ipoib_dbg(priv, "stopping interface\n"); | |
143 | ||
144 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
145 | ||
146 | netif_stop_queue(dev); | |
147 | ||
0b3ea082 JM |
148 | /* |
149 | * Now flush workqueue to make sure a scheduled task doesn't | |
150 | * bring our internal state back up. | |
151 | */ | |
152 | flush_workqueue(ipoib_workqueue); | |
153 | ||
154 | ipoib_ib_dev_down(dev, 1); | |
1da177e4 LT |
155 | ipoib_ib_dev_stop(dev); |
156 | ||
157 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
158 | struct ipoib_dev_priv *cpriv; | |
159 | ||
160 | /* Bring down any child interfaces too */ | |
95ed644f | 161 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
162 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
163 | int flags; | |
164 | ||
165 | flags = cpriv->dev->flags; | |
166 | if (!(flags & IFF_UP)) | |
167 | continue; | |
168 | ||
169 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
170 | } | |
95ed644f | 171 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
172 | } |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) | |
178 | { | |
179 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
180 | ||
181 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) | |
182 | return -EINVAL; | |
183 | ||
184 | priv->admin_mtu = new_mtu; | |
185 | ||
186 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
37c22a77 | 191 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
192 | { |
193 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
194 | struct rb_node *n = priv->path_tree.rb_node; | |
195 | struct ipoib_path *path; | |
196 | int ret; | |
197 | ||
198 | while (n) { | |
199 | path = rb_entry(n, struct ipoib_path, rb_node); | |
200 | ||
37c22a77 | 201 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
202 | sizeof (union ib_gid)); |
203 | ||
204 | if (ret < 0) | |
205 | n = n->rb_left; | |
206 | else if (ret > 0) | |
207 | n = n->rb_right; | |
208 | else | |
209 | return path; | |
210 | } | |
211 | ||
212 | return NULL; | |
213 | } | |
214 | ||
215 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
216 | { | |
217 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
218 | struct rb_node **n = &priv->path_tree.rb_node; | |
219 | struct rb_node *pn = NULL; | |
220 | struct ipoib_path *tpath; | |
221 | int ret; | |
222 | ||
223 | while (*n) { | |
224 | pn = *n; | |
225 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
226 | ||
227 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
228 | sizeof (union ib_gid)); | |
229 | if (ret < 0) | |
230 | n = &pn->rb_left; | |
231 | else if (ret > 0) | |
232 | n = &pn->rb_right; | |
233 | else | |
234 | return -EEXIST; | |
235 | } | |
236 | ||
237 | rb_link_node(&path->rb_node, pn, n); | |
238 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
239 | ||
240 | list_add_tail(&path->list, &priv->path_list); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
246 | { | |
247 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
248 | struct ipoib_neigh *neigh, *tn; | |
249 | struct sk_buff *skb; | |
250 | unsigned long flags; | |
251 | ||
252 | while ((skb = __skb_dequeue(&path->queue))) | |
253 | dev_kfree_skb_irq(skb); | |
254 | ||
255 | spin_lock_irqsave(&priv->lock, flags); | |
256 | ||
257 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
258 | /* | |
259 | * It's safe to call ipoib_put_ah() inside priv->lock | |
260 | * here, because we know that path->ah will always | |
261 | * hold one more reference, so ipoib_put_ah() will | |
262 | * never do more than decrement the ref count. | |
263 | */ | |
264 | if (neigh->ah) | |
265 | ipoib_put_ah(neigh->ah); | |
d2e0655e | 266 | |
2745b5b7 | 267 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
268 | } |
269 | ||
270 | spin_unlock_irqrestore(&priv->lock, flags); | |
271 | ||
272 | if (path->ah) | |
273 | ipoib_put_ah(path->ah); | |
274 | ||
275 | kfree(path); | |
276 | } | |
277 | ||
1732b0ef RD |
278 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
279 | ||
280 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
281 | { | |
282 | struct ipoib_path_iter *iter; | |
283 | ||
284 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
285 | if (!iter) | |
286 | return NULL; | |
287 | ||
288 | iter->dev = dev; | |
289 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
290 | ||
291 | if (ipoib_path_iter_next(iter)) { | |
292 | kfree(iter); | |
293 | return NULL; | |
294 | } | |
295 | ||
296 | return iter; | |
297 | } | |
298 | ||
299 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
300 | { | |
301 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
302 | struct rb_node *n; | |
303 | struct ipoib_path *path; | |
304 | int ret = 1; | |
305 | ||
306 | spin_lock_irq(&priv->lock); | |
307 | ||
308 | n = rb_first(&priv->path_tree); | |
309 | ||
310 | while (n) { | |
311 | path = rb_entry(n, struct ipoib_path, rb_node); | |
312 | ||
313 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
314 | sizeof (union ib_gid)) < 0) { | |
315 | iter->path = *path; | |
316 | ret = 0; | |
317 | break; | |
318 | } | |
319 | ||
320 | n = rb_next(n); | |
321 | } | |
322 | ||
323 | spin_unlock_irq(&priv->lock); | |
324 | ||
325 | return ret; | |
326 | } | |
327 | ||
328 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
329 | struct ipoib_path *path) | |
330 | { | |
331 | *path = iter->path; | |
332 | } | |
333 | ||
334 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
335 | ||
1da177e4 LT |
336 | void ipoib_flush_paths(struct net_device *dev) |
337 | { | |
338 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
339 | struct ipoib_path *path, *tp; | |
340 | LIST_HEAD(remove_list); | |
1da177e4 | 341 | |
9217b27b MT |
342 | spin_lock_irq(&priv->tx_lock); |
343 | spin_lock(&priv->lock); | |
1da177e4 LT |
344 | |
345 | list_splice(&priv->path_list, &remove_list); | |
346 | INIT_LIST_HEAD(&priv->path_list); | |
347 | ||
348 | list_for_each_entry(path, &remove_list, list) | |
349 | rb_erase(&path->rb_node, &priv->path_tree); | |
350 | ||
1da177e4 LT |
351 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
352 | if (path->query) | |
353 | ib_sa_cancel_query(path->query_id, path->query); | |
9217b27b MT |
354 | spin_unlock(&priv->lock); |
355 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
356 | wait_for_completion(&path->done); |
357 | path_free(dev, path); | |
9217b27b MT |
358 | spin_lock_irq(&priv->tx_lock); |
359 | spin_lock(&priv->lock); | |
1da177e4 | 360 | } |
9217b27b MT |
361 | spin_unlock(&priv->lock); |
362 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
363 | } |
364 | ||
365 | static void path_rec_completion(int status, | |
366 | struct ib_sa_path_rec *pathrec, | |
367 | void *path_ptr) | |
368 | { | |
369 | struct ipoib_path *path = path_ptr; | |
370 | struct net_device *dev = path->dev; | |
371 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
372 | struct ipoib_ah *ah = NULL; | |
373 | struct ipoib_neigh *neigh; | |
374 | struct sk_buff_head skqueue; | |
375 | struct sk_buff *skb; | |
376 | unsigned long flags; | |
377 | ||
378 | if (pathrec) | |
379 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", | |
380 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); | |
381 | else | |
382 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", | |
383 | status, IPOIB_GID_ARG(path->pathrec.dgid)); | |
384 | ||
385 | skb_queue_head_init(&skqueue); | |
386 | ||
387 | if (!status) { | |
388 | struct ib_ah_attr av = { | |
389 | .dlid = be16_to_cpu(pathrec->dlid), | |
390 | .sl = pathrec->sl, | |
bf6a9e31 JM |
391 | .port_num = priv->port, |
392 | .static_rate = pathrec->rate | |
1da177e4 | 393 | }; |
1da177e4 LT |
394 | |
395 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
396 | } | |
397 | ||
398 | spin_lock_irqsave(&priv->lock, flags); | |
399 | ||
400 | path->ah = ah; | |
401 | ||
402 | if (ah) { | |
403 | path->pathrec = *pathrec; | |
404 | ||
405 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", | |
406 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
407 | ||
408 | while ((skb = __skb_dequeue(&path->queue))) | |
409 | __skb_queue_tail(&skqueue, skb); | |
410 | ||
411 | list_for_each_entry(neigh, &path->neigh_list, list) { | |
412 | kref_get(&path->ah->ref); | |
413 | neigh->ah = path->ah; | |
8a7f7521 MT |
414 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
415 | sizeof(union ib_gid)); | |
1da177e4 LT |
416 | |
417 | while ((skb = __skb_dequeue(&neigh->queue))) | |
418 | __skb_queue_tail(&skqueue, skb); | |
419 | } | |
5872a9fc | 420 | } |
1da177e4 | 421 | |
5872a9fc | 422 | path->query = NULL; |
1da177e4 LT |
423 | complete(&path->done); |
424 | ||
425 | spin_unlock_irqrestore(&priv->lock, flags); | |
426 | ||
427 | while ((skb = __skb_dequeue(&skqueue))) { | |
428 | skb->dev = dev; | |
429 | if (dev_queue_xmit(skb)) | |
430 | ipoib_warn(priv, "dev_queue_xmit failed " | |
431 | "to requeue packet\n"); | |
432 | } | |
433 | } | |
434 | ||
37c22a77 | 435 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
436 | { |
437 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
438 | struct ipoib_path *path; | |
439 | ||
21a38489 | 440 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
441 | if (!path) |
442 | return NULL; | |
443 | ||
21a38489 | 444 | path->dev = dev; |
1da177e4 LT |
445 | |
446 | skb_queue_head_init(&path->queue); | |
447 | ||
448 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 449 | |
37c22a77 | 450 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
1da177e4 LT |
451 | path->pathrec.sgid = priv->local_gid; |
452 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
453 | path->pathrec.numb_path = 1; | |
454 | ||
455 | return path; | |
456 | } | |
457 | ||
458 | static int path_rec_start(struct net_device *dev, | |
459 | struct ipoib_path *path) | |
460 | { | |
461 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
462 | ||
463 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", | |
464 | IPOIB_GID_ARG(path->pathrec.dgid)); | |
465 | ||
65c7edda RD |
466 | init_completion(&path->done); |
467 | ||
1da177e4 | 468 | path->query_id = |
c1a0b23b | 469 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
470 | &path->pathrec, |
471 | IB_SA_PATH_REC_DGID | | |
472 | IB_SA_PATH_REC_SGID | | |
473 | IB_SA_PATH_REC_NUMB_PATH | | |
474 | IB_SA_PATH_REC_PKEY, | |
475 | 1000, GFP_ATOMIC, | |
476 | path_rec_completion, | |
477 | path, &path->query); | |
478 | if (path->query_id < 0) { | |
479 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); | |
480 | path->query = NULL; | |
481 | return path->query_id; | |
482 | } | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
488 | { | |
489 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
490 | struct ipoib_path *path; | |
491 | struct ipoib_neigh *neigh; | |
492 | ||
d2e0655e | 493 | neigh = ipoib_neigh_alloc(skb->dst->neighbour); |
1da177e4 LT |
494 | if (!neigh) { |
495 | ++priv->stats.tx_dropped; | |
496 | dev_kfree_skb_any(skb); | |
497 | return; | |
498 | } | |
499 | ||
1da177e4 LT |
500 | /* |
501 | * We can only be called from ipoib_start_xmit, so we're | |
502 | * inside tx_lock -- no need to save/restore flags. | |
503 | */ | |
504 | spin_lock(&priv->lock); | |
505 | ||
37c22a77 | 506 | path = __path_find(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 507 | if (!path) { |
37c22a77 | 508 | path = path_rec_create(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 509 | if (!path) |
d2e0655e | 510 | goto err_path; |
1da177e4 LT |
511 | |
512 | __path_add(dev, path); | |
513 | } | |
514 | ||
515 | list_add_tail(&neigh->list, &path->neigh_list); | |
516 | ||
47f7a071 | 517 | if (path->ah) { |
1da177e4 LT |
518 | kref_get(&path->ah->ref); |
519 | neigh->ah = path->ah; | |
8a7f7521 MT |
520 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
521 | sizeof(union ib_gid)); | |
1da177e4 | 522 | |
073ae841 | 523 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha)); |
1da177e4 LT |
524 | } else { |
525 | neigh->ah = NULL; | |
1da177e4 LT |
526 | |
527 | if (!path->query && path_rec_start(dev, path)) | |
d2e0655e | 528 | goto err_list; |
2745b5b7 MT |
529 | |
530 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
531 | } |
532 | ||
533 | spin_unlock(&priv->lock); | |
534 | return; | |
535 | ||
d2e0655e | 536 | err_list: |
1da177e4 | 537 | list_del(&neigh->list); |
1da177e4 | 538 | |
d2e0655e | 539 | err_path: |
2745b5b7 | 540 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
541 | ++priv->stats.tx_dropped; |
542 | dev_kfree_skb_any(skb); | |
543 | ||
544 | spin_unlock(&priv->lock); | |
545 | } | |
546 | ||
d70ed607 | 547 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
548 | { |
549 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
550 | ||
551 | /* Look up path record for unicasts */ | |
552 | if (skb->dst->neighbour->ha[4] != 0xff) { | |
553 | neigh_add_path(skb, dev); | |
554 | return; | |
555 | } | |
556 | ||
557 | /* Add in the P_Key for multicasts */ | |
558 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; | |
559 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; | |
37c22a77 | 560 | ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb); |
1da177e4 LT |
561 | } |
562 | ||
563 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
564 | struct ipoib_pseudoheader *phdr) | |
565 | { | |
566 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
567 | struct ipoib_path *path; | |
568 | ||
569 | /* | |
570 | * We can only be called from ipoib_start_xmit, so we're | |
571 | * inside tx_lock -- no need to save/restore flags. | |
572 | */ | |
573 | spin_lock(&priv->lock); | |
574 | ||
37c22a77 | 575 | path = __path_find(dev, phdr->hwaddr + 4); |
1da177e4 | 576 | if (!path) { |
37c22a77 | 577 | path = path_rec_create(dev, phdr->hwaddr + 4); |
1da177e4 LT |
578 | if (path) { |
579 | /* put pseudoheader back on for next time */ | |
580 | skb_push(skb, sizeof *phdr); | |
581 | __skb_queue_tail(&path->queue, skb); | |
582 | ||
583 | if (path_rec_start(dev, path)) { | |
584 | spin_unlock(&priv->lock); | |
585 | path_free(dev, path); | |
586 | return; | |
587 | } else | |
588 | __path_add(dev, path); | |
589 | } else { | |
590 | ++priv->stats.tx_dropped; | |
591 | dev_kfree_skb_any(skb); | |
592 | } | |
593 | ||
594 | spin_unlock(&priv->lock); | |
595 | return; | |
596 | } | |
597 | ||
47f7a071 | 598 | if (path->ah) { |
1da177e4 LT |
599 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
600 | be16_to_cpu(path->pathrec.dlid)); | |
601 | ||
073ae841 | 602 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); |
1da177e4 LT |
603 | } else if ((path->query || !path_rec_start(dev, path)) && |
604 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
605 | /* put pseudoheader back on for next time */ | |
606 | skb_push(skb, sizeof *phdr); | |
607 | __skb_queue_tail(&path->queue, skb); | |
608 | } else { | |
609 | ++priv->stats.tx_dropped; | |
610 | dev_kfree_skb_any(skb); | |
611 | } | |
612 | ||
613 | spin_unlock(&priv->lock); | |
614 | } | |
615 | ||
616 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
617 | { | |
618 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
619 | struct ipoib_neigh *neigh; | |
620 | unsigned long flags; | |
621 | ||
a8bfca02 | 622 | if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags))) |
1da177e4 | 623 | return NETDEV_TX_LOCKED; |
1da177e4 LT |
624 | |
625 | /* | |
626 | * Check if our queue is stopped. Since we have the LLTX bit | |
627 | * set, we can't rely on netif_stop_queue() preventing our | |
628 | * xmit function from being called with a full queue. | |
629 | */ | |
630 | if (unlikely(netif_queue_stopped(dev))) { | |
631 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
632 | return NETDEV_TX_BUSY; | |
633 | } | |
634 | ||
a8bfca02 | 635 | if (likely(skb->dst && skb->dst->neighbour)) { |
1da177e4 | 636 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { |
d70ed607 | 637 | ipoib_path_lookup(skb, dev); |
1da177e4 LT |
638 | goto out; |
639 | } | |
640 | ||
641 | neigh = *to_ipoib_neigh(skb->dst->neighbour); | |
642 | ||
643 | if (likely(neigh->ah)) { | |
8a7f7521 MT |
644 | if (unlikely(memcmp(&neigh->dgid.raw, |
645 | skb->dst->neighbour->ha + 4, | |
646 | sizeof(union ib_gid)))) { | |
647 | spin_lock(&priv->lock); | |
648 | /* | |
649 | * It's safe to call ipoib_put_ah() inside | |
650 | * priv->lock here, because we know that | |
651 | * path->ah will always hold one more reference, | |
652 | * so ipoib_put_ah() will never do more than | |
653 | * decrement the ref count. | |
654 | */ | |
655 | ipoib_put_ah(neigh->ah); | |
656 | list_del(&neigh->list); | |
2745b5b7 | 657 | ipoib_neigh_free(dev, neigh); |
8a7f7521 MT |
658 | spin_unlock(&priv->lock); |
659 | ipoib_path_lookup(skb, dev); | |
660 | goto out; | |
661 | } | |
662 | ||
073ae841 | 663 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha)); |
1da177e4 LT |
664 | goto out; |
665 | } | |
666 | ||
667 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
668 | spin_lock(&priv->lock); | |
669 | __skb_queue_tail(&neigh->queue, skb); | |
670 | spin_unlock(&priv->lock); | |
671 | } else { | |
672 | ++priv->stats.tx_dropped; | |
673 | dev_kfree_skb_any(skb); | |
674 | } | |
675 | } else { | |
676 | struct ipoib_pseudoheader *phdr = | |
677 | (struct ipoib_pseudoheader *) skb->data; | |
678 | skb_pull(skb, sizeof *phdr); | |
679 | ||
680 | if (phdr->hwaddr[4] == 0xff) { | |
681 | /* Add in the P_Key for multicast*/ | |
682 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
683 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
684 | ||
37c22a77 | 685 | ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); |
1da177e4 | 686 | } else { |
0dca0f7b | 687 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 688 | |
0dca0f7b HR |
689 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
690 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
1da177e4 LT |
691 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
692 | IPOIB_GID_FMT "\n", | |
693 | skb->dst ? "neigh" : "dst", | |
97f52eb4 | 694 | be16_to_cpup((__be16 *) skb->data), |
073ae841 | 695 | IPOIB_QPN(phdr->hwaddr), |
37c22a77 | 696 | IPOIB_GID_RAW_ARG(phdr->hwaddr + 4)); |
1da177e4 LT |
697 | dev_kfree_skb_any(skb); |
698 | ++priv->stats.tx_dropped; | |
699 | goto out; | |
700 | } | |
701 | ||
702 | unicast_arp_send(skb, dev, phdr); | |
703 | } | |
704 | } | |
705 | ||
706 | out: | |
707 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
708 | ||
709 | return NETDEV_TX_OK; | |
710 | } | |
711 | ||
712 | static struct net_device_stats *ipoib_get_stats(struct net_device *dev) | |
713 | { | |
714 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
715 | ||
716 | return &priv->stats; | |
717 | } | |
718 | ||
719 | static void ipoib_timeout(struct net_device *dev) | |
720 | { | |
721 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
722 | ||
4b2d319b RD |
723 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
724 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
725 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
726 | netif_queue_stopped(dev), | |
727 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
728 | /* XXX reset QP, etc. */ |
729 | } | |
730 | ||
731 | static int ipoib_hard_header(struct sk_buff *skb, | |
732 | struct net_device *dev, | |
733 | unsigned short type, | |
734 | void *daddr, void *saddr, unsigned len) | |
735 | { | |
736 | struct ipoib_header *header; | |
737 | ||
738 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
739 | ||
740 | header->proto = htons(type); | |
741 | header->reserved = 0; | |
742 | ||
743 | /* | |
744 | * If we don't have a neighbour structure, stuff the | |
745 | * destination address onto the front of the skb so we can | |
746 | * figure out where to send the packet later. | |
747 | */ | |
ef12d456 | 748 | if ((!skb->dst || !skb->dst->neighbour) && daddr) { |
1da177e4 LT |
749 | struct ipoib_pseudoheader *phdr = |
750 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
751 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
752 | } | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | static void ipoib_set_mcast_list(struct net_device *dev) | |
758 | { | |
759 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
760 | ||
7a343d4c LA |
761 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
762 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
763 | return; | |
764 | } | |
765 | ||
1ad62a19 | 766 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
767 | } |
768 | ||
769 | static void ipoib_neigh_destructor(struct neighbour *n) | |
770 | { | |
771 | struct ipoib_neigh *neigh; | |
772 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
773 | unsigned long flags; | |
774 | struct ipoib_ah *ah = NULL; | |
775 | ||
776 | ipoib_dbg(priv, | |
777 | "neigh_destructor for %06x " IPOIB_GID_FMT "\n", | |
073ae841 | 778 | IPOIB_QPN(n->ha), |
37c22a77 | 779 | IPOIB_GID_RAW_ARG(n->ha + 4)); |
1da177e4 LT |
780 | |
781 | spin_lock_irqsave(&priv->lock, flags); | |
782 | ||
783 | neigh = *to_ipoib_neigh(n); | |
784 | if (neigh) { | |
785 | if (neigh->ah) | |
786 | ah = neigh->ah; | |
787 | list_del(&neigh->list); | |
2745b5b7 | 788 | ipoib_neigh_free(n->dev, neigh); |
1da177e4 LT |
789 | } |
790 | ||
791 | spin_unlock_irqrestore(&priv->lock, flags); | |
792 | ||
793 | if (ah) | |
794 | ipoib_put_ah(ah); | |
795 | } | |
796 | ||
d2e0655e MT |
797 | struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour) |
798 | { | |
799 | struct ipoib_neigh *neigh; | |
800 | ||
801 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
802 | if (!neigh) | |
803 | return NULL; | |
804 | ||
805 | neigh->neighbour = neighbour; | |
806 | *to_ipoib_neigh(neighbour) = neigh; | |
82b39913 | 807 | skb_queue_head_init(&neigh->queue); |
d2e0655e MT |
808 | |
809 | return neigh; | |
810 | } | |
811 | ||
2745b5b7 | 812 | void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh) |
d2e0655e | 813 | { |
2745b5b7 MT |
814 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
815 | struct sk_buff *skb; | |
d2e0655e | 816 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
2745b5b7 MT |
817 | while ((skb = __skb_dequeue(&neigh->queue))) { |
818 | ++priv->stats.tx_dropped; | |
819 | dev_kfree_skb_any(skb); | |
820 | } | |
d2e0655e MT |
821 | kfree(neigh); |
822 | } | |
823 | ||
1da177e4 LT |
824 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
825 | { | |
c5ecd62c | 826 | parms->neigh_destructor = ipoib_neigh_destructor; |
1da177e4 LT |
827 | |
828 | return 0; | |
829 | } | |
830 | ||
831 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
832 | { | |
833 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
834 | ||
835 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 836 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
837 | GFP_KERNEL); |
838 | if (!priv->rx_ring) { | |
839 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 840 | ca->name, ipoib_recvq_size); |
1da177e4 LT |
841 | goto out; |
842 | } | |
1da177e4 | 843 | |
0f485251 | 844 | priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, |
1da177e4 LT |
845 | GFP_KERNEL); |
846 | if (!priv->tx_ring) { | |
847 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 848 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
849 | goto out_rx_ring_cleanup; |
850 | } | |
1da177e4 LT |
851 | |
852 | /* priv->tx_head & tx_tail are already 0 */ | |
853 | ||
854 | if (ipoib_ib_dev_init(dev, ca, port)) | |
855 | goto out_tx_ring_cleanup; | |
856 | ||
857 | return 0; | |
858 | ||
859 | out_tx_ring_cleanup: | |
860 | kfree(priv->tx_ring); | |
861 | ||
862 | out_rx_ring_cleanup: | |
863 | kfree(priv->rx_ring); | |
864 | ||
865 | out: | |
866 | return -ENOMEM; | |
867 | } | |
868 | ||
869 | void ipoib_dev_cleanup(struct net_device *dev) | |
870 | { | |
871 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
872 | ||
1732b0ef | 873 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
874 | |
875 | /* Delete any child interfaces first */ | |
876 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
877 | unregister_netdev(cpriv->dev); | |
878 | ipoib_dev_cleanup(cpriv->dev); | |
879 | free_netdev(cpriv->dev); | |
880 | } | |
881 | ||
882 | ipoib_ib_dev_cleanup(dev); | |
883 | ||
92a6b34b HR |
884 | kfree(priv->rx_ring); |
885 | kfree(priv->tx_ring); | |
1da177e4 | 886 | |
92a6b34b HR |
887 | priv->rx_ring = NULL; |
888 | priv->tx_ring = NULL; | |
1da177e4 LT |
889 | } |
890 | ||
891 | static void ipoib_setup(struct net_device *dev) | |
892 | { | |
893 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
894 | ||
895 | dev->open = ipoib_open; | |
896 | dev->stop = ipoib_stop; | |
897 | dev->change_mtu = ipoib_change_mtu; | |
898 | dev->hard_start_xmit = ipoib_start_xmit; | |
899 | dev->get_stats = ipoib_get_stats; | |
900 | dev->tx_timeout = ipoib_timeout; | |
901 | dev->hard_header = ipoib_hard_header; | |
902 | dev->set_multicast_list = ipoib_set_mcast_list; | |
903 | dev->neigh_setup = ipoib_neigh_setup_dev; | |
904 | ||
905 | dev->watchdog_timeo = HZ; | |
906 | ||
1da177e4 LT |
907 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
908 | ||
909 | /* | |
910 | * We add in INFINIBAND_ALEN to allow for the destination | |
911 | * address "pseudoheader" for skbs without neighbour struct. | |
912 | */ | |
913 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; | |
914 | dev->addr_len = INFINIBAND_ALEN; | |
915 | dev->type = ARPHRD_INFINIBAND; | |
0f485251 | 916 | dev->tx_queue_len = ipoib_sendq_size * 2; |
1da177e4 LT |
917 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; |
918 | ||
919 | /* MTU will be reset when mcast join happens */ | |
920 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; | |
921 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; | |
922 | ||
923 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); | |
924 | ||
925 | netif_carrier_off(dev); | |
926 | ||
927 | SET_MODULE_OWNER(dev); | |
928 | ||
929 | priv->dev = dev; | |
930 | ||
931 | spin_lock_init(&priv->lock); | |
932 | spin_lock_init(&priv->tx_lock); | |
933 | ||
95ed644f IM |
934 | mutex_init(&priv->mcast_mutex); |
935 | mutex_init(&priv->vlan_mutex); | |
1da177e4 LT |
936 | |
937 | INIT_LIST_HEAD(&priv->path_list); | |
938 | INIT_LIST_HEAD(&priv->child_intfs); | |
939 | INIT_LIST_HEAD(&priv->dead_ahs); | |
940 | INIT_LIST_HEAD(&priv->multicast_list); | |
941 | ||
c4028958 DH |
942 | INIT_DELAYED_WORK(&priv->pkey_task, ipoib_pkey_poll); |
943 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); | |
944 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush); | |
945 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); | |
946 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
1da177e4 LT |
947 | } |
948 | ||
949 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
950 | { | |
951 | struct net_device *dev; | |
952 | ||
953 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
954 | ipoib_setup); | |
955 | if (!dev) | |
956 | return NULL; | |
957 | ||
958 | return netdev_priv(dev); | |
959 | } | |
960 | ||
961 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
962 | { | |
963 | struct ipoib_dev_priv *priv = | |
964 | netdev_priv(container_of(cdev, struct net_device, class_dev)); | |
965 | ||
966 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
967 | } | |
968 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
969 | ||
970 | static ssize_t create_child(struct class_device *cdev, | |
971 | const char *buf, size_t count) | |
972 | { | |
973 | int pkey; | |
974 | int ret; | |
975 | ||
976 | if (sscanf(buf, "%i", &pkey) != 1) | |
977 | return -EINVAL; | |
978 | ||
979 | if (pkey < 0 || pkey > 0xffff) | |
980 | return -EINVAL; | |
981 | ||
4ce05937 RD |
982 | /* |
983 | * Set the full membership bit, so that we join the right | |
984 | * broadcast group, etc. | |
985 | */ | |
986 | pkey |= 0x8000; | |
987 | ||
1da177e4 LT |
988 | ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev), |
989 | pkey); | |
990 | ||
991 | return ret ? ret : count; | |
992 | } | |
993 | static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); | |
994 | ||
995 | static ssize_t delete_child(struct class_device *cdev, | |
996 | const char *buf, size_t count) | |
997 | { | |
998 | int pkey; | |
999 | int ret; | |
1000 | ||
1001 | if (sscanf(buf, "%i", &pkey) != 1) | |
1002 | return -EINVAL; | |
1003 | ||
1004 | if (pkey < 0 || pkey > 0xffff) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev), | |
1008 | pkey); | |
1009 | ||
1010 | return ret ? ret : count; | |
1011 | ||
1012 | } | |
1013 | static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); | |
1014 | ||
1015 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1016 | { | |
1017 | return class_device_create_file(&dev->class_dev, | |
1018 | &class_device_attr_pkey); | |
1019 | } | |
1020 | ||
1021 | static struct net_device *ipoib_add_port(const char *format, | |
1022 | struct ib_device *hca, u8 port) | |
1023 | { | |
1024 | struct ipoib_dev_priv *priv; | |
1025 | int result = -ENOMEM; | |
1026 | ||
1027 | priv = ipoib_intf_alloc(format); | |
1028 | if (!priv) | |
1029 | goto alloc_mem_failed; | |
1030 | ||
1031 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
1032 | ||
1033 | result = ib_query_pkey(hca, port, 0, &priv->pkey); | |
1034 | if (result) { | |
1035 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1036 | hca->name, port, result); | |
1037 | goto alloc_mem_failed; | |
1038 | } | |
1039 | ||
4ce05937 RD |
1040 | /* |
1041 | * Set the full membership bit, so that we join the right | |
1042 | * broadcast group, etc. | |
1043 | */ | |
1044 | priv->pkey |= 0x8000; | |
1045 | ||
1da177e4 LT |
1046 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1047 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1048 | ||
1049 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1050 | if (result) { | |
1051 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1052 | hca->name, port, result); | |
1053 | goto alloc_mem_failed; | |
1054 | } else | |
1055 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1056 | ||
1057 | ||
1058 | result = ipoib_dev_init(priv->dev, hca, port); | |
1059 | if (result < 0) { | |
1060 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1061 | hca->name, port, result); | |
1062 | goto device_init_failed; | |
1063 | } | |
1064 | ||
1065 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1066 | priv->ca, ipoib_event); | |
1067 | result = ib_register_event_handler(&priv->event_handler); | |
1068 | if (result < 0) { | |
1069 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1070 | "port %d (ret = %d)\n", | |
1071 | hca->name, port, result); | |
1072 | goto event_failed; | |
1073 | } | |
1074 | ||
1075 | result = register_netdev(priv->dev); | |
1076 | if (result) { | |
1077 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1078 | hca->name, port, result); | |
1079 | goto register_failed; | |
1080 | } | |
1081 | ||
1732b0ef | 1082 | ipoib_create_debug_files(priv->dev); |
1da177e4 LT |
1083 | |
1084 | if (ipoib_add_pkey_attr(priv->dev)) | |
1085 | goto sysfs_failed; | |
1086 | if (class_device_create_file(&priv->dev->class_dev, | |
1087 | &class_device_attr_create_child)) | |
1088 | goto sysfs_failed; | |
1089 | if (class_device_create_file(&priv->dev->class_dev, | |
1090 | &class_device_attr_delete_child)) | |
1091 | goto sysfs_failed; | |
1092 | ||
1093 | return priv->dev; | |
1094 | ||
1095 | sysfs_failed: | |
1732b0ef | 1096 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1097 | unregister_netdev(priv->dev); |
1098 | ||
1099 | register_failed: | |
1100 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1101 | flush_scheduled_work(); |
1da177e4 LT |
1102 | |
1103 | event_failed: | |
1104 | ipoib_dev_cleanup(priv->dev); | |
1105 | ||
1106 | device_init_failed: | |
1107 | free_netdev(priv->dev); | |
1108 | ||
1109 | alloc_mem_failed: | |
1110 | return ERR_PTR(result); | |
1111 | } | |
1112 | ||
1113 | static void ipoib_add_one(struct ib_device *device) | |
1114 | { | |
1115 | struct list_head *dev_list; | |
1116 | struct net_device *dev; | |
1117 | struct ipoib_dev_priv *priv; | |
1118 | int s, e, p; | |
1119 | ||
07ebafba TT |
1120 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1121 | return; | |
1122 | ||
1da177e4 LT |
1123 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1124 | if (!dev_list) | |
1125 | return; | |
1126 | ||
1127 | INIT_LIST_HEAD(dev_list); | |
1128 | ||
07ebafba | 1129 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1130 | s = 0; |
1131 | e = 0; | |
1132 | } else { | |
1133 | s = 1; | |
1134 | e = device->phys_port_cnt; | |
1135 | } | |
1136 | ||
1137 | for (p = s; p <= e; ++p) { | |
1138 | dev = ipoib_add_port("ib%d", device, p); | |
1139 | if (!IS_ERR(dev)) { | |
1140 | priv = netdev_priv(dev); | |
1141 | list_add_tail(&priv->list, dev_list); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1146 | } | |
1147 | ||
1148 | static void ipoib_remove_one(struct ib_device *device) | |
1149 | { | |
1150 | struct ipoib_dev_priv *priv, *tmp; | |
1151 | struct list_head *dev_list; | |
1152 | ||
07ebafba TT |
1153 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1154 | return; | |
1155 | ||
1da177e4 LT |
1156 | dev_list = ib_get_client_data(device, &ipoib_client); |
1157 | ||
1158 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1159 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1160 | flush_scheduled_work(); |
1da177e4 LT |
1161 | |
1162 | unregister_netdev(priv->dev); | |
1163 | ipoib_dev_cleanup(priv->dev); | |
1164 | free_netdev(priv->dev); | |
1165 | } | |
06c56e44 MT |
1166 | |
1167 | kfree(dev_list); | |
1da177e4 LT |
1168 | } |
1169 | ||
1170 | static int __init ipoib_init_module(void) | |
1171 | { | |
1172 | int ret; | |
1173 | ||
0f485251 SM |
1174 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1175 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1176 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1177 | ||
1178 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1179 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
1180 | ipoib_sendq_size = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE); | |
1181 | ||
1da177e4 LT |
1182 | ret = ipoib_register_debugfs(); |
1183 | if (ret) | |
1184 | return ret; | |
1185 | ||
1186 | /* | |
1187 | * We create our own workqueue mainly because we want to be | |
1188 | * able to flush it when devices are being removed. We can't | |
1189 | * use schedule_work()/flush_scheduled_work() because both | |
1190 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1191 | * so flush_scheduled_work() can deadlock during device | |
1192 | * removal. | |
1193 | */ | |
1194 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1195 | if (!ipoib_workqueue) { | |
1196 | ret = -ENOMEM; | |
1197 | goto err_fs; | |
1198 | } | |
1199 | ||
c1a0b23b MT |
1200 | ib_sa_register_client(&ipoib_sa_client); |
1201 | ||
1da177e4 LT |
1202 | ret = ib_register_client(&ipoib_client); |
1203 | if (ret) | |
c1a0b23b | 1204 | goto err_sa; |
1da177e4 LT |
1205 | |
1206 | return 0; | |
1207 | ||
c1a0b23b MT |
1208 | err_sa: |
1209 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1210 | destroy_workqueue(ipoib_workqueue); |
1211 | ||
9adec1a8 RD |
1212 | err_fs: |
1213 | ipoib_unregister_debugfs(); | |
1214 | ||
1da177e4 LT |
1215 | return ret; |
1216 | } | |
1217 | ||
1218 | static void __exit ipoib_cleanup_module(void) | |
1219 | { | |
1da177e4 | 1220 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1221 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1222 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1223 | destroy_workqueue(ipoib_workqueue); |
1224 | } | |
1225 | ||
1226 | module_init(ipoib_init_module); | |
1227 | module_exit(ipoib_cleanup_module); |