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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 | ||
1da177e4 LT |
52 | MODULE_AUTHOR("Roland Dreier"); |
53 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
0f485251 SM |
56 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
57 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
58 | ||
59 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
60 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
61 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
62 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
63 | ||
1da177e4 LT |
64 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
65 | int ipoib_debug_level; | |
66 | ||
67 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
68 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
69 | #endif | |
70 | ||
1732b0ef RD |
71 | struct ipoib_path_iter { |
72 | struct net_device *dev; | |
73 | struct ipoib_path path; | |
74 | }; | |
75 | ||
1da177e4 LT |
76 | static const u8 ipv4_bcast_addr[] = { |
77 | 0x00, 0xff, 0xff, 0xff, | |
78 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
79 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
80 | }; | |
81 | ||
82 | struct workqueue_struct *ipoib_workqueue; | |
83 | ||
c1a0b23b MT |
84 | struct ib_sa_client ipoib_sa_client; |
85 | ||
1da177e4 LT |
86 | static void ipoib_add_one(struct ib_device *device); |
87 | static void ipoib_remove_one(struct ib_device *device); | |
88 | ||
89 | static struct ib_client ipoib_client = { | |
90 | .name = "ipoib", | |
91 | .add = ipoib_add_one, | |
92 | .remove = ipoib_remove_one | |
93 | }; | |
94 | ||
95 | int ipoib_open(struct net_device *dev) | |
96 | { | |
97 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
98 | ||
99 | ipoib_dbg(priv, "bringing up interface\n"); | |
100 | ||
101 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
102 | ||
103 | if (ipoib_pkey_dev_delay_open(dev)) | |
104 | return 0; | |
105 | ||
106 | if (ipoib_ib_dev_open(dev)) | |
107 | return -EINVAL; | |
108 | ||
267ee88e RD |
109 | if (ipoib_ib_dev_up(dev)) { |
110 | ipoib_ib_dev_stop(dev); | |
1da177e4 | 111 | return -EINVAL; |
267ee88e | 112 | } |
1da177e4 LT |
113 | |
114 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
115 | struct ipoib_dev_priv *cpriv; | |
116 | ||
117 | /* Bring up any child interfaces too */ | |
95ed644f | 118 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
119 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
120 | int flags; | |
121 | ||
122 | flags = cpriv->dev->flags; | |
123 | if (flags & IFF_UP) | |
124 | continue; | |
125 | ||
126 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
127 | } | |
95ed644f | 128 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
129 | } |
130 | ||
131 | netif_start_queue(dev); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static int ipoib_stop(struct net_device *dev) | |
137 | { | |
138 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
139 | ||
140 | ipoib_dbg(priv, "stopping interface\n"); | |
141 | ||
142 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
143 | ||
144 | netif_stop_queue(dev); | |
145 | ||
839fcaba MT |
146 | clear_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags); |
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 | ||
839fcaba MT |
181 | /* dev->mtu > 2K ==> connected mode */ |
182 | if (ipoib_cm_admin_enabled(dev) && new_mtu <= IPOIB_CM_MTU) { | |
183 | if (new_mtu > priv->mcast_mtu) | |
184 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
185 | priv->mcast_mtu); | |
186 | dev->mtu = new_mtu; | |
187 | return 0; | |
188 | } | |
189 | ||
190 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) { | |
1da177e4 | 191 | return -EINVAL; |
839fcaba | 192 | } |
1da177e4 LT |
193 | |
194 | priv->admin_mtu = new_mtu; | |
195 | ||
196 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
37c22a77 | 201 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
202 | { |
203 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
204 | struct rb_node *n = priv->path_tree.rb_node; | |
205 | struct ipoib_path *path; | |
206 | int ret; | |
207 | ||
208 | while (n) { | |
209 | path = rb_entry(n, struct ipoib_path, rb_node); | |
210 | ||
37c22a77 | 211 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
212 | sizeof (union ib_gid)); |
213 | ||
214 | if (ret < 0) | |
215 | n = n->rb_left; | |
216 | else if (ret > 0) | |
217 | n = n->rb_right; | |
218 | else | |
219 | return path; | |
220 | } | |
221 | ||
222 | return NULL; | |
223 | } | |
224 | ||
225 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
226 | { | |
227 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
228 | struct rb_node **n = &priv->path_tree.rb_node; | |
229 | struct rb_node *pn = NULL; | |
230 | struct ipoib_path *tpath; | |
231 | int ret; | |
232 | ||
233 | while (*n) { | |
234 | pn = *n; | |
235 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
236 | ||
237 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
238 | sizeof (union ib_gid)); | |
239 | if (ret < 0) | |
240 | n = &pn->rb_left; | |
241 | else if (ret > 0) | |
242 | n = &pn->rb_right; | |
243 | else | |
244 | return -EEXIST; | |
245 | } | |
246 | ||
247 | rb_link_node(&path->rb_node, pn, n); | |
248 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
249 | ||
250 | list_add_tail(&path->list, &priv->path_list); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
256 | { | |
257 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
258 | struct ipoib_neigh *neigh, *tn; | |
259 | struct sk_buff *skb; | |
260 | unsigned long flags; | |
261 | ||
262 | while ((skb = __skb_dequeue(&path->queue))) | |
263 | dev_kfree_skb_irq(skb); | |
264 | ||
265 | spin_lock_irqsave(&priv->lock, flags); | |
266 | ||
267 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
268 | /* | |
269 | * It's safe to call ipoib_put_ah() inside priv->lock | |
270 | * here, because we know that path->ah will always | |
271 | * hold one more reference, so ipoib_put_ah() will | |
272 | * never do more than decrement the ref count. | |
273 | */ | |
274 | if (neigh->ah) | |
275 | ipoib_put_ah(neigh->ah); | |
d2e0655e | 276 | |
2745b5b7 | 277 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
278 | } |
279 | ||
280 | spin_unlock_irqrestore(&priv->lock, flags); | |
281 | ||
282 | if (path->ah) | |
283 | ipoib_put_ah(path->ah); | |
284 | ||
285 | kfree(path); | |
286 | } | |
287 | ||
1732b0ef RD |
288 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
289 | ||
290 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
291 | { | |
292 | struct ipoib_path_iter *iter; | |
293 | ||
294 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
295 | if (!iter) | |
296 | return NULL; | |
297 | ||
298 | iter->dev = dev; | |
299 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
300 | ||
301 | if (ipoib_path_iter_next(iter)) { | |
302 | kfree(iter); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | return iter; | |
307 | } | |
308 | ||
309 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
310 | { | |
311 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
312 | struct rb_node *n; | |
313 | struct ipoib_path *path; | |
314 | int ret = 1; | |
315 | ||
316 | spin_lock_irq(&priv->lock); | |
317 | ||
318 | n = rb_first(&priv->path_tree); | |
319 | ||
320 | while (n) { | |
321 | path = rb_entry(n, struct ipoib_path, rb_node); | |
322 | ||
323 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
324 | sizeof (union ib_gid)) < 0) { | |
325 | iter->path = *path; | |
326 | ret = 0; | |
327 | break; | |
328 | } | |
329 | ||
330 | n = rb_next(n); | |
331 | } | |
332 | ||
333 | spin_unlock_irq(&priv->lock); | |
334 | ||
335 | return ret; | |
336 | } | |
337 | ||
338 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
339 | struct ipoib_path *path) | |
340 | { | |
341 | *path = iter->path; | |
342 | } | |
343 | ||
344 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
345 | ||
1da177e4 LT |
346 | void ipoib_flush_paths(struct net_device *dev) |
347 | { | |
348 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
349 | struct ipoib_path *path, *tp; | |
350 | LIST_HEAD(remove_list); | |
1da177e4 | 351 | |
9217b27b MT |
352 | spin_lock_irq(&priv->tx_lock); |
353 | spin_lock(&priv->lock); | |
1da177e4 LT |
354 | |
355 | list_splice(&priv->path_list, &remove_list); | |
356 | INIT_LIST_HEAD(&priv->path_list); | |
357 | ||
358 | list_for_each_entry(path, &remove_list, list) | |
359 | rb_erase(&path->rb_node, &priv->path_tree); | |
360 | ||
1da177e4 LT |
361 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
362 | if (path->query) | |
363 | ib_sa_cancel_query(path->query_id, path->query); | |
9217b27b MT |
364 | spin_unlock(&priv->lock); |
365 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
366 | wait_for_completion(&path->done); |
367 | path_free(dev, path); | |
9217b27b MT |
368 | spin_lock_irq(&priv->tx_lock); |
369 | spin_lock(&priv->lock); | |
1da177e4 | 370 | } |
9217b27b MT |
371 | spin_unlock(&priv->lock); |
372 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
373 | } |
374 | ||
375 | static void path_rec_completion(int status, | |
376 | struct ib_sa_path_rec *pathrec, | |
377 | void *path_ptr) | |
378 | { | |
379 | struct ipoib_path *path = path_ptr; | |
380 | struct net_device *dev = path->dev; | |
381 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
382 | struct ipoib_ah *ah = NULL; | |
d04d01b1 | 383 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
384 | struct sk_buff_head skqueue; |
385 | struct sk_buff *skb; | |
386 | unsigned long flags; | |
387 | ||
843613b0 | 388 | if (!status) |
1da177e4 LT |
389 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", |
390 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); | |
391 | else | |
392 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", | |
393 | status, IPOIB_GID_ARG(path->pathrec.dgid)); | |
394 | ||
395 | skb_queue_head_init(&skqueue); | |
396 | ||
397 | if (!status) { | |
398 | struct ib_ah_attr av = { | |
399 | .dlid = be16_to_cpu(pathrec->dlid), | |
400 | .sl = pathrec->sl, | |
bf6a9e31 JM |
401 | .port_num = priv->port, |
402 | .static_rate = pathrec->rate | |
1da177e4 | 403 | }; |
1da177e4 LT |
404 | |
405 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
406 | } | |
407 | ||
408 | spin_lock_irqsave(&priv->lock, flags); | |
409 | ||
410 | path->ah = ah; | |
411 | ||
412 | if (ah) { | |
413 | path->pathrec = *pathrec; | |
414 | ||
415 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", | |
416 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
417 | ||
418 | while ((skb = __skb_dequeue(&path->queue))) | |
419 | __skb_queue_tail(&skqueue, skb); | |
420 | ||
d04d01b1 | 421 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
1da177e4 LT |
422 | kref_get(&path->ah->ref); |
423 | neigh->ah = path->ah; | |
8a7f7521 MT |
424 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
425 | sizeof(union ib_gid)); | |
1da177e4 | 426 | |
839fcaba MT |
427 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
428 | if (!ipoib_cm_get(neigh)) | |
429 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
430 | path, | |
431 | neigh)); | |
432 | if (!ipoib_cm_get(neigh)) { | |
433 | list_del(&neigh->list); | |
434 | if (neigh->ah) | |
435 | ipoib_put_ah(neigh->ah); | |
436 | ipoib_neigh_free(dev, neigh); | |
437 | continue; | |
438 | } | |
439 | } | |
440 | ||
1da177e4 LT |
441 | while ((skb = __skb_dequeue(&neigh->queue))) |
442 | __skb_queue_tail(&skqueue, skb); | |
443 | } | |
5872a9fc | 444 | } |
1da177e4 | 445 | |
5872a9fc | 446 | path->query = NULL; |
1da177e4 LT |
447 | complete(&path->done); |
448 | ||
449 | spin_unlock_irqrestore(&priv->lock, flags); | |
450 | ||
451 | while ((skb = __skb_dequeue(&skqueue))) { | |
452 | skb->dev = dev; | |
453 | if (dev_queue_xmit(skb)) | |
454 | ipoib_warn(priv, "dev_queue_xmit failed " | |
455 | "to requeue packet\n"); | |
456 | } | |
457 | } | |
458 | ||
37c22a77 | 459 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
460 | { |
461 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
462 | struct ipoib_path *path; | |
463 | ||
21a38489 | 464 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
465 | if (!path) |
466 | return NULL; | |
467 | ||
21a38489 | 468 | path->dev = dev; |
1da177e4 LT |
469 | |
470 | skb_queue_head_init(&path->queue); | |
471 | ||
472 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 473 | |
37c22a77 | 474 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
1da177e4 LT |
475 | path->pathrec.sgid = priv->local_gid; |
476 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
477 | path->pathrec.numb_path = 1; | |
478 | ||
479 | return path; | |
480 | } | |
481 | ||
482 | static int path_rec_start(struct net_device *dev, | |
483 | struct ipoib_path *path) | |
484 | { | |
485 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
486 | ||
487 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", | |
488 | IPOIB_GID_ARG(path->pathrec.dgid)); | |
489 | ||
65c7edda RD |
490 | init_completion(&path->done); |
491 | ||
1da177e4 | 492 | path->query_id = |
c1a0b23b | 493 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
494 | &path->pathrec, |
495 | IB_SA_PATH_REC_DGID | | |
496 | IB_SA_PATH_REC_SGID | | |
497 | IB_SA_PATH_REC_NUMB_PATH | | |
498 | IB_SA_PATH_REC_PKEY, | |
499 | 1000, GFP_ATOMIC, | |
500 | path_rec_completion, | |
501 | path, &path->query); | |
502 | if (path->query_id < 0) { | |
503 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); | |
504 | path->query = NULL; | |
505 | return path->query_id; | |
506 | } | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
512 | { | |
513 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
514 | struct ipoib_path *path; | |
515 | struct ipoib_neigh *neigh; | |
516 | ||
d2e0655e | 517 | neigh = ipoib_neigh_alloc(skb->dst->neighbour); |
1da177e4 LT |
518 | if (!neigh) { |
519 | ++priv->stats.tx_dropped; | |
520 | dev_kfree_skb_any(skb); | |
521 | return; | |
522 | } | |
523 | ||
1da177e4 LT |
524 | /* |
525 | * We can only be called from ipoib_start_xmit, so we're | |
526 | * inside tx_lock -- no need to save/restore flags. | |
527 | */ | |
528 | spin_lock(&priv->lock); | |
529 | ||
37c22a77 | 530 | path = __path_find(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 531 | if (!path) { |
37c22a77 | 532 | path = path_rec_create(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 533 | if (!path) |
d2e0655e | 534 | goto err_path; |
1da177e4 LT |
535 | |
536 | __path_add(dev, path); | |
537 | } | |
538 | ||
539 | list_add_tail(&neigh->list, &path->neigh_list); | |
540 | ||
47f7a071 | 541 | if (path->ah) { |
1da177e4 LT |
542 | kref_get(&path->ah->ref); |
543 | neigh->ah = path->ah; | |
8a7f7521 MT |
544 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
545 | sizeof(union ib_gid)); | |
1da177e4 | 546 | |
839fcaba MT |
547 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
548 | if (!ipoib_cm_get(neigh)) | |
549 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
550 | if (!ipoib_cm_get(neigh)) { | |
551 | list_del(&neigh->list); | |
552 | if (neigh->ah) | |
553 | ipoib_put_ah(neigh->ah); | |
554 | ipoib_neigh_free(dev, neigh); | |
555 | goto err_drop; | |
556 | } | |
557 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
558 | __skb_queue_tail(&neigh->queue, skb); | |
559 | else { | |
560 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
561 | skb_queue_len(&neigh->queue)); | |
562 | goto err_drop; | |
563 | } | |
564 | } else | |
565 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha)); | |
1da177e4 LT |
566 | } else { |
567 | neigh->ah = NULL; | |
1da177e4 LT |
568 | |
569 | if (!path->query && path_rec_start(dev, path)) | |
d2e0655e | 570 | goto err_list; |
2745b5b7 MT |
571 | |
572 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
573 | } |
574 | ||
575 | spin_unlock(&priv->lock); | |
576 | return; | |
577 | ||
d2e0655e | 578 | err_list: |
1da177e4 | 579 | list_del(&neigh->list); |
1da177e4 | 580 | |
d2e0655e | 581 | err_path: |
2745b5b7 | 582 | ipoib_neigh_free(dev, neigh); |
839fcaba | 583 | err_drop: |
1da177e4 LT |
584 | ++priv->stats.tx_dropped; |
585 | dev_kfree_skb_any(skb); | |
586 | ||
587 | spin_unlock(&priv->lock); | |
588 | } | |
589 | ||
d70ed607 | 590 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
591 | { |
592 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
593 | ||
594 | /* Look up path record for unicasts */ | |
595 | if (skb->dst->neighbour->ha[4] != 0xff) { | |
596 | neigh_add_path(skb, dev); | |
597 | return; | |
598 | } | |
599 | ||
600 | /* Add in the P_Key for multicasts */ | |
601 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; | |
602 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; | |
37c22a77 | 603 | ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb); |
1da177e4 LT |
604 | } |
605 | ||
606 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
607 | struct ipoib_pseudoheader *phdr) | |
608 | { | |
609 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
610 | struct ipoib_path *path; | |
611 | ||
612 | /* | |
613 | * We can only be called from ipoib_start_xmit, so we're | |
614 | * inside tx_lock -- no need to save/restore flags. | |
615 | */ | |
616 | spin_lock(&priv->lock); | |
617 | ||
37c22a77 | 618 | path = __path_find(dev, phdr->hwaddr + 4); |
1da177e4 | 619 | if (!path) { |
37c22a77 | 620 | path = path_rec_create(dev, phdr->hwaddr + 4); |
1da177e4 LT |
621 | if (path) { |
622 | /* put pseudoheader back on for next time */ | |
623 | skb_push(skb, sizeof *phdr); | |
624 | __skb_queue_tail(&path->queue, skb); | |
625 | ||
626 | if (path_rec_start(dev, path)) { | |
627 | spin_unlock(&priv->lock); | |
628 | path_free(dev, path); | |
629 | return; | |
630 | } else | |
631 | __path_add(dev, path); | |
632 | } else { | |
633 | ++priv->stats.tx_dropped; | |
634 | dev_kfree_skb_any(skb); | |
635 | } | |
636 | ||
637 | spin_unlock(&priv->lock); | |
638 | return; | |
639 | } | |
640 | ||
47f7a071 | 641 | if (path->ah) { |
1da177e4 LT |
642 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
643 | be16_to_cpu(path->pathrec.dlid)); | |
644 | ||
073ae841 | 645 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); |
1da177e4 LT |
646 | } else if ((path->query || !path_rec_start(dev, path)) && |
647 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
648 | /* put pseudoheader back on for next time */ | |
649 | skb_push(skb, sizeof *phdr); | |
650 | __skb_queue_tail(&path->queue, skb); | |
651 | } else { | |
652 | ++priv->stats.tx_dropped; | |
653 | dev_kfree_skb_any(skb); | |
654 | } | |
655 | ||
656 | spin_unlock(&priv->lock); | |
657 | } | |
658 | ||
659 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
660 | { | |
661 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
662 | struct ipoib_neigh *neigh; | |
663 | unsigned long flags; | |
664 | ||
a8bfca02 | 665 | if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags))) |
1da177e4 | 666 | return NETDEV_TX_LOCKED; |
1da177e4 LT |
667 | |
668 | /* | |
669 | * Check if our queue is stopped. Since we have the LLTX bit | |
670 | * set, we can't rely on netif_stop_queue() preventing our | |
671 | * xmit function from being called with a full queue. | |
672 | */ | |
673 | if (unlikely(netif_queue_stopped(dev))) { | |
674 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
675 | return NETDEV_TX_BUSY; | |
676 | } | |
677 | ||
a8bfca02 | 678 | if (likely(skb->dst && skb->dst->neighbour)) { |
1da177e4 | 679 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { |
d70ed607 | 680 | ipoib_path_lookup(skb, dev); |
1da177e4 LT |
681 | goto out; |
682 | } | |
683 | ||
684 | neigh = *to_ipoib_neigh(skb->dst->neighbour); | |
685 | ||
839fcaba MT |
686 | if (ipoib_cm_get(neigh)) { |
687 | if (ipoib_cm_up(neigh)) { | |
688 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
689 | goto out; | |
690 | } | |
691 | } else if (neigh->ah) { | |
8a7f7521 MT |
692 | if (unlikely(memcmp(&neigh->dgid.raw, |
693 | skb->dst->neighbour->ha + 4, | |
694 | sizeof(union ib_gid)))) { | |
695 | spin_lock(&priv->lock); | |
696 | /* | |
697 | * It's safe to call ipoib_put_ah() inside | |
698 | * priv->lock here, because we know that | |
699 | * path->ah will always hold one more reference, | |
700 | * so ipoib_put_ah() will never do more than | |
701 | * decrement the ref count. | |
702 | */ | |
703 | ipoib_put_ah(neigh->ah); | |
704 | list_del(&neigh->list); | |
2745b5b7 | 705 | ipoib_neigh_free(dev, neigh); |
8a7f7521 MT |
706 | spin_unlock(&priv->lock); |
707 | ipoib_path_lookup(skb, dev); | |
708 | goto out; | |
709 | } | |
710 | ||
073ae841 | 711 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha)); |
1da177e4 LT |
712 | goto out; |
713 | } | |
714 | ||
715 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
716 | spin_lock(&priv->lock); | |
717 | __skb_queue_tail(&neigh->queue, skb); | |
718 | spin_unlock(&priv->lock); | |
719 | } else { | |
720 | ++priv->stats.tx_dropped; | |
721 | dev_kfree_skb_any(skb); | |
722 | } | |
723 | } else { | |
724 | struct ipoib_pseudoheader *phdr = | |
725 | (struct ipoib_pseudoheader *) skb->data; | |
726 | skb_pull(skb, sizeof *phdr); | |
727 | ||
728 | if (phdr->hwaddr[4] == 0xff) { | |
729 | /* Add in the P_Key for multicast*/ | |
730 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
731 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
732 | ||
37c22a77 | 733 | ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); |
1da177e4 | 734 | } else { |
0dca0f7b | 735 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 736 | |
0dca0f7b HR |
737 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
738 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
1da177e4 LT |
739 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
740 | IPOIB_GID_FMT "\n", | |
741 | skb->dst ? "neigh" : "dst", | |
97f52eb4 | 742 | be16_to_cpup((__be16 *) skb->data), |
073ae841 | 743 | IPOIB_QPN(phdr->hwaddr), |
37c22a77 | 744 | IPOIB_GID_RAW_ARG(phdr->hwaddr + 4)); |
1da177e4 LT |
745 | dev_kfree_skb_any(skb); |
746 | ++priv->stats.tx_dropped; | |
747 | goto out; | |
748 | } | |
749 | ||
750 | unicast_arp_send(skb, dev, phdr); | |
751 | } | |
752 | } | |
753 | ||
754 | out: | |
755 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
756 | ||
757 | return NETDEV_TX_OK; | |
758 | } | |
759 | ||
760 | static struct net_device_stats *ipoib_get_stats(struct net_device *dev) | |
761 | { | |
762 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
763 | ||
764 | return &priv->stats; | |
765 | } | |
766 | ||
767 | static void ipoib_timeout(struct net_device *dev) | |
768 | { | |
769 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
770 | ||
4b2d319b RD |
771 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
772 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
773 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
774 | netif_queue_stopped(dev), | |
775 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
776 | /* XXX reset QP, etc. */ |
777 | } | |
778 | ||
779 | static int ipoib_hard_header(struct sk_buff *skb, | |
780 | struct net_device *dev, | |
781 | unsigned short type, | |
782 | void *daddr, void *saddr, unsigned len) | |
783 | { | |
784 | struct ipoib_header *header; | |
785 | ||
786 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
787 | ||
788 | header->proto = htons(type); | |
789 | header->reserved = 0; | |
790 | ||
791 | /* | |
792 | * If we don't have a neighbour structure, stuff the | |
793 | * destination address onto the front of the skb so we can | |
794 | * figure out where to send the packet later. | |
795 | */ | |
ef12d456 | 796 | if ((!skb->dst || !skb->dst->neighbour) && daddr) { |
1da177e4 LT |
797 | struct ipoib_pseudoheader *phdr = |
798 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
799 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
800 | } | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | static void ipoib_set_mcast_list(struct net_device *dev) | |
806 | { | |
807 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
808 | ||
7a343d4c LA |
809 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
810 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
811 | return; | |
812 | } | |
813 | ||
1ad62a19 | 814 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
815 | } |
816 | ||
817 | static void ipoib_neigh_destructor(struct neighbour *n) | |
818 | { | |
819 | struct ipoib_neigh *neigh; | |
820 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
821 | unsigned long flags; | |
822 | struct ipoib_ah *ah = NULL; | |
823 | ||
824 | ipoib_dbg(priv, | |
825 | "neigh_destructor for %06x " IPOIB_GID_FMT "\n", | |
073ae841 | 826 | IPOIB_QPN(n->ha), |
37c22a77 | 827 | IPOIB_GID_RAW_ARG(n->ha + 4)); |
1da177e4 LT |
828 | |
829 | spin_lock_irqsave(&priv->lock, flags); | |
830 | ||
831 | neigh = *to_ipoib_neigh(n); | |
832 | if (neigh) { | |
833 | if (neigh->ah) | |
834 | ah = neigh->ah; | |
835 | list_del(&neigh->list); | |
2745b5b7 | 836 | ipoib_neigh_free(n->dev, neigh); |
1da177e4 LT |
837 | } |
838 | ||
839 | spin_unlock_irqrestore(&priv->lock, flags); | |
840 | ||
841 | if (ah) | |
842 | ipoib_put_ah(ah); | |
843 | } | |
844 | ||
d2e0655e MT |
845 | struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour) |
846 | { | |
847 | struct ipoib_neigh *neigh; | |
848 | ||
849 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
850 | if (!neigh) | |
851 | return NULL; | |
852 | ||
853 | neigh->neighbour = neighbour; | |
854 | *to_ipoib_neigh(neighbour) = neigh; | |
82b39913 | 855 | skb_queue_head_init(&neigh->queue); |
839fcaba | 856 | ipoib_cm_set(neigh, NULL); |
d2e0655e MT |
857 | |
858 | return neigh; | |
859 | } | |
860 | ||
2745b5b7 | 861 | void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh) |
d2e0655e | 862 | { |
2745b5b7 MT |
863 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
864 | struct sk_buff *skb; | |
d2e0655e | 865 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
2745b5b7 MT |
866 | while ((skb = __skb_dequeue(&neigh->queue))) { |
867 | ++priv->stats.tx_dropped; | |
868 | dev_kfree_skb_any(skb); | |
869 | } | |
839fcaba MT |
870 | if (ipoib_cm_get(neigh)) |
871 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
d2e0655e MT |
872 | kfree(neigh); |
873 | } | |
874 | ||
1da177e4 LT |
875 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
876 | { | |
c5ecd62c | 877 | parms->neigh_destructor = ipoib_neigh_destructor; |
1da177e4 LT |
878 | |
879 | return 0; | |
880 | } | |
881 | ||
882 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
883 | { | |
884 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
885 | ||
886 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 887 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
888 | GFP_KERNEL); |
889 | if (!priv->rx_ring) { | |
890 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 891 | ca->name, ipoib_recvq_size); |
1da177e4 LT |
892 | goto out; |
893 | } | |
1da177e4 | 894 | |
0f485251 | 895 | priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, |
1da177e4 LT |
896 | GFP_KERNEL); |
897 | if (!priv->tx_ring) { | |
898 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 899 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
900 | goto out_rx_ring_cleanup; |
901 | } | |
1da177e4 LT |
902 | |
903 | /* priv->tx_head & tx_tail are already 0 */ | |
904 | ||
905 | if (ipoib_ib_dev_init(dev, ca, port)) | |
906 | goto out_tx_ring_cleanup; | |
907 | ||
908 | return 0; | |
909 | ||
910 | out_tx_ring_cleanup: | |
911 | kfree(priv->tx_ring); | |
912 | ||
913 | out_rx_ring_cleanup: | |
914 | kfree(priv->rx_ring); | |
915 | ||
916 | out: | |
917 | return -ENOMEM; | |
918 | } | |
919 | ||
920 | void ipoib_dev_cleanup(struct net_device *dev) | |
921 | { | |
922 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
923 | ||
1732b0ef | 924 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
925 | |
926 | /* Delete any child interfaces first */ | |
927 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
928 | unregister_netdev(cpriv->dev); | |
929 | ipoib_dev_cleanup(cpriv->dev); | |
930 | free_netdev(cpriv->dev); | |
931 | } | |
932 | ||
933 | ipoib_ib_dev_cleanup(dev); | |
934 | ||
92a6b34b HR |
935 | kfree(priv->rx_ring); |
936 | kfree(priv->tx_ring); | |
1da177e4 | 937 | |
92a6b34b HR |
938 | priv->rx_ring = NULL; |
939 | priv->tx_ring = NULL; | |
1da177e4 LT |
940 | } |
941 | ||
942 | static void ipoib_setup(struct net_device *dev) | |
943 | { | |
944 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
945 | ||
946 | dev->open = ipoib_open; | |
947 | dev->stop = ipoib_stop; | |
948 | dev->change_mtu = ipoib_change_mtu; | |
949 | dev->hard_start_xmit = ipoib_start_xmit; | |
950 | dev->get_stats = ipoib_get_stats; | |
951 | dev->tx_timeout = ipoib_timeout; | |
952 | dev->hard_header = ipoib_hard_header; | |
953 | dev->set_multicast_list = ipoib_set_mcast_list; | |
954 | dev->neigh_setup = ipoib_neigh_setup_dev; | |
955 | ||
956 | dev->watchdog_timeo = HZ; | |
957 | ||
1da177e4 LT |
958 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
959 | ||
960 | /* | |
961 | * We add in INFINIBAND_ALEN to allow for the destination | |
962 | * address "pseudoheader" for skbs without neighbour struct. | |
963 | */ | |
964 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; | |
965 | dev->addr_len = INFINIBAND_ALEN; | |
966 | dev->type = ARPHRD_INFINIBAND; | |
0f485251 | 967 | dev->tx_queue_len = ipoib_sendq_size * 2; |
1da177e4 LT |
968 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; |
969 | ||
970 | /* MTU will be reset when mcast join happens */ | |
971 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; | |
972 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; | |
973 | ||
974 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); | |
975 | ||
976 | netif_carrier_off(dev); | |
977 | ||
978 | SET_MODULE_OWNER(dev); | |
979 | ||
980 | priv->dev = dev; | |
981 | ||
982 | spin_lock_init(&priv->lock); | |
983 | spin_lock_init(&priv->tx_lock); | |
984 | ||
95ed644f IM |
985 | mutex_init(&priv->mcast_mutex); |
986 | mutex_init(&priv->vlan_mutex); | |
1da177e4 LT |
987 | |
988 | INIT_LIST_HEAD(&priv->path_list); | |
989 | INIT_LIST_HEAD(&priv->child_intfs); | |
990 | INIT_LIST_HEAD(&priv->dead_ahs); | |
991 | INIT_LIST_HEAD(&priv->multicast_list); | |
992 | ||
c4028958 DH |
993 | INIT_DELAYED_WORK(&priv->pkey_task, ipoib_pkey_poll); |
994 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); | |
995 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush); | |
996 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); | |
997 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
1da177e4 LT |
998 | } |
999 | ||
1000 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1001 | { | |
1002 | struct net_device *dev; | |
1003 | ||
1004 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
1005 | ipoib_setup); | |
1006 | if (!dev) | |
1007 | return NULL; | |
1008 | ||
1009 | return netdev_priv(dev); | |
1010 | } | |
1011 | ||
43cb76d9 GKH |
1012 | static ssize_t show_pkey(struct device *dev, |
1013 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1014 | { |
43cb76d9 | 1015 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1016 | |
1017 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1018 | } | |
43cb76d9 | 1019 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1020 | |
43cb76d9 GKH |
1021 | static ssize_t create_child(struct device *dev, |
1022 | struct device_attribute *attr, | |
1da177e4 LT |
1023 | const char *buf, size_t count) |
1024 | { | |
1025 | int pkey; | |
1026 | int ret; | |
1027 | ||
1028 | if (sscanf(buf, "%i", &pkey) != 1) | |
1029 | return -EINVAL; | |
1030 | ||
1031 | if (pkey < 0 || pkey > 0xffff) | |
1032 | return -EINVAL; | |
1033 | ||
4ce05937 RD |
1034 | /* |
1035 | * Set the full membership bit, so that we join the right | |
1036 | * broadcast group, etc. | |
1037 | */ | |
1038 | pkey |= 0x8000; | |
1039 | ||
43cb76d9 | 1040 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1041 | |
1042 | return ret ? ret : count; | |
1043 | } | |
43cb76d9 | 1044 | static DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); |
1da177e4 | 1045 | |
43cb76d9 GKH |
1046 | static ssize_t delete_child(struct device *dev, |
1047 | struct device_attribute *attr, | |
1da177e4 LT |
1048 | const char *buf, size_t count) |
1049 | { | |
1050 | int pkey; | |
1051 | int ret; | |
1052 | ||
1053 | if (sscanf(buf, "%i", &pkey) != 1) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | if (pkey < 0 || pkey > 0xffff) | |
1057 | return -EINVAL; | |
1058 | ||
43cb76d9 | 1059 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1060 | |
1061 | return ret ? ret : count; | |
1062 | ||
1063 | } | |
43cb76d9 | 1064 | static DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); |
1da177e4 LT |
1065 | |
1066 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1067 | { | |
43cb76d9 | 1068 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1069 | } |
1070 | ||
1071 | static struct net_device *ipoib_add_port(const char *format, | |
1072 | struct ib_device *hca, u8 port) | |
1073 | { | |
1074 | struct ipoib_dev_priv *priv; | |
1075 | int result = -ENOMEM; | |
1076 | ||
1077 | priv = ipoib_intf_alloc(format); | |
1078 | if (!priv) | |
1079 | goto alloc_mem_failed; | |
1080 | ||
1081 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
1082 | ||
1083 | result = ib_query_pkey(hca, port, 0, &priv->pkey); | |
1084 | if (result) { | |
1085 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1086 | hca->name, port, result); | |
1087 | goto alloc_mem_failed; | |
1088 | } | |
1089 | ||
4ce05937 RD |
1090 | /* |
1091 | * Set the full membership bit, so that we join the right | |
1092 | * broadcast group, etc. | |
1093 | */ | |
1094 | priv->pkey |= 0x8000; | |
1095 | ||
1da177e4 LT |
1096 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1097 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1098 | ||
1099 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1100 | if (result) { | |
1101 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1102 | hca->name, port, result); | |
1103 | goto alloc_mem_failed; | |
1104 | } else | |
1105 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1106 | ||
1107 | ||
1108 | result = ipoib_dev_init(priv->dev, hca, port); | |
1109 | if (result < 0) { | |
1110 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1111 | hca->name, port, result); | |
1112 | goto device_init_failed; | |
1113 | } | |
1114 | ||
1115 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1116 | priv->ca, ipoib_event); | |
1117 | result = ib_register_event_handler(&priv->event_handler); | |
1118 | if (result < 0) { | |
1119 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1120 | "port %d (ret = %d)\n", | |
1121 | hca->name, port, result); | |
1122 | goto event_failed; | |
1123 | } | |
1124 | ||
1125 | result = register_netdev(priv->dev); | |
1126 | if (result) { | |
1127 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1128 | hca->name, port, result); | |
1129 | goto register_failed; | |
1130 | } | |
1131 | ||
1732b0ef | 1132 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1133 | |
839fcaba MT |
1134 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1135 | goto sysfs_failed; | |
1da177e4 LT |
1136 | if (ipoib_add_pkey_attr(priv->dev)) |
1137 | goto sysfs_failed; | |
43cb76d9 | 1138 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1139 | goto sysfs_failed; |
43cb76d9 | 1140 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1141 | goto sysfs_failed; |
1142 | ||
1143 | return priv->dev; | |
1144 | ||
1145 | sysfs_failed: | |
1732b0ef | 1146 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1147 | unregister_netdev(priv->dev); |
1148 | ||
1149 | register_failed: | |
1150 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1151 | flush_scheduled_work(); |
1da177e4 LT |
1152 | |
1153 | event_failed: | |
1154 | ipoib_dev_cleanup(priv->dev); | |
1155 | ||
1156 | device_init_failed: | |
1157 | free_netdev(priv->dev); | |
1158 | ||
1159 | alloc_mem_failed: | |
1160 | return ERR_PTR(result); | |
1161 | } | |
1162 | ||
1163 | static void ipoib_add_one(struct ib_device *device) | |
1164 | { | |
1165 | struct list_head *dev_list; | |
1166 | struct net_device *dev; | |
1167 | struct ipoib_dev_priv *priv; | |
1168 | int s, e, p; | |
1169 | ||
07ebafba TT |
1170 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1171 | return; | |
1172 | ||
1da177e4 LT |
1173 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1174 | if (!dev_list) | |
1175 | return; | |
1176 | ||
1177 | INIT_LIST_HEAD(dev_list); | |
1178 | ||
07ebafba | 1179 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1180 | s = 0; |
1181 | e = 0; | |
1182 | } else { | |
1183 | s = 1; | |
1184 | e = device->phys_port_cnt; | |
1185 | } | |
1186 | ||
1187 | for (p = s; p <= e; ++p) { | |
1188 | dev = ipoib_add_port("ib%d", device, p); | |
1189 | if (!IS_ERR(dev)) { | |
1190 | priv = netdev_priv(dev); | |
1191 | list_add_tail(&priv->list, dev_list); | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1196 | } | |
1197 | ||
1198 | static void ipoib_remove_one(struct ib_device *device) | |
1199 | { | |
1200 | struct ipoib_dev_priv *priv, *tmp; | |
1201 | struct list_head *dev_list; | |
1202 | ||
07ebafba TT |
1203 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1204 | return; | |
1205 | ||
1da177e4 LT |
1206 | dev_list = ib_get_client_data(device, &ipoib_client); |
1207 | ||
1208 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1209 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1210 | flush_scheduled_work(); |
1da177e4 LT |
1211 | |
1212 | unregister_netdev(priv->dev); | |
1213 | ipoib_dev_cleanup(priv->dev); | |
1214 | free_netdev(priv->dev); | |
1215 | } | |
06c56e44 MT |
1216 | |
1217 | kfree(dev_list); | |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | static int __init ipoib_init_module(void) | |
1221 | { | |
1222 | int ret; | |
1223 | ||
0f485251 SM |
1224 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1225 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1226 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1227 | ||
1228 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1229 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
1230 | ipoib_sendq_size = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE); | |
1231 | ||
1da177e4 LT |
1232 | ret = ipoib_register_debugfs(); |
1233 | if (ret) | |
1234 | return ret; | |
1235 | ||
1236 | /* | |
1237 | * We create our own workqueue mainly because we want to be | |
1238 | * able to flush it when devices are being removed. We can't | |
1239 | * use schedule_work()/flush_scheduled_work() because both | |
1240 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1241 | * so flush_scheduled_work() can deadlock during device | |
1242 | * removal. | |
1243 | */ | |
1244 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1245 | if (!ipoib_workqueue) { | |
1246 | ret = -ENOMEM; | |
1247 | goto err_fs; | |
1248 | } | |
1249 | ||
c1a0b23b MT |
1250 | ib_sa_register_client(&ipoib_sa_client); |
1251 | ||
1da177e4 LT |
1252 | ret = ib_register_client(&ipoib_client); |
1253 | if (ret) | |
c1a0b23b | 1254 | goto err_sa; |
1da177e4 LT |
1255 | |
1256 | return 0; | |
1257 | ||
c1a0b23b MT |
1258 | err_sa: |
1259 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1260 | destroy_workqueue(ipoib_workqueue); |
1261 | ||
9adec1a8 RD |
1262 | err_fs: |
1263 | ipoib_unregister_debugfs(); | |
1264 | ||
1da177e4 LT |
1265 | return ret; |
1266 | } | |
1267 | ||
1268 | static void __exit ipoib_cleanup_module(void) | |
1269 | { | |
1da177e4 | 1270 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1271 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1272 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1273 | destroy_workqueue(ipoib_workqueue); |
1274 | } | |
1275 | ||
1276 | module_init(ipoib_init_module); | |
1277 | module_exit(ipoib_cleanup_module); |