Commit | Line | Data |
---|---|---|
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 | ||
bea3348e | 101 | napi_enable(&priv->napi); |
1da177e4 LT |
102 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
103 | ||
104 | if (ipoib_pkey_dev_delay_open(dev)) | |
105 | return 0; | |
106 | ||
bea3348e SH |
107 | if (ipoib_ib_dev_open(dev)) { |
108 | napi_disable(&priv->napi); | |
1da177e4 | 109 | return -EINVAL; |
bea3348e | 110 | } |
1da177e4 | 111 | |
267ee88e | 112 | if (ipoib_ib_dev_up(dev)) { |
26bbf13c | 113 | ipoib_ib_dev_stop(dev, 1); |
bea3348e | 114 | napi_disable(&priv->napi); |
1da177e4 | 115 | return -EINVAL; |
267ee88e | 116 | } |
1da177e4 LT |
117 | |
118 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
119 | struct ipoib_dev_priv *cpriv; | |
120 | ||
121 | /* Bring up any child interfaces too */ | |
95ed644f | 122 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
123 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
124 | int flags; | |
125 | ||
126 | flags = cpriv->dev->flags; | |
127 | if (flags & IFF_UP) | |
128 | continue; | |
129 | ||
130 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
131 | } | |
95ed644f | 132 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
133 | } |
134 | ||
135 | netif_start_queue(dev); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int ipoib_stop(struct net_device *dev) | |
141 | { | |
142 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
143 | ||
144 | ipoib_dbg(priv, "stopping interface\n"); | |
145 | ||
146 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
bea3348e | 147 | napi_disable(&priv->napi); |
1da177e4 LT |
148 | |
149 | netif_stop_queue(dev); | |
150 | ||
0b3ea082 JM |
151 | /* |
152 | * Now flush workqueue to make sure a scheduled task doesn't | |
153 | * bring our internal state back up. | |
154 | */ | |
155 | flush_workqueue(ipoib_workqueue); | |
156 | ||
157 | ipoib_ib_dev_down(dev, 1); | |
26bbf13c | 158 | ipoib_ib_dev_stop(dev, 1); |
1da177e4 LT |
159 | |
160 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
161 | struct ipoib_dev_priv *cpriv; | |
162 | ||
163 | /* Bring down any child interfaces too */ | |
95ed644f | 164 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
165 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
166 | int flags; | |
167 | ||
168 | flags = cpriv->dev->flags; | |
169 | if (!(flags & IFF_UP)) | |
170 | continue; | |
171 | ||
172 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
173 | } | |
95ed644f | 174 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
175 | } |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) | |
181 | { | |
182 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
183 | ||
839fcaba MT |
184 | /* dev->mtu > 2K ==> connected mode */ |
185 | if (ipoib_cm_admin_enabled(dev) && new_mtu <= IPOIB_CM_MTU) { | |
186 | if (new_mtu > priv->mcast_mtu) | |
187 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
188 | priv->mcast_mtu); | |
189 | dev->mtu = new_mtu; | |
190 | return 0; | |
191 | } | |
192 | ||
193 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) { | |
1da177e4 | 194 | return -EINVAL; |
839fcaba | 195 | } |
1da177e4 LT |
196 | |
197 | priv->admin_mtu = new_mtu; | |
198 | ||
199 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
37c22a77 | 204 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
205 | { |
206 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
207 | struct rb_node *n = priv->path_tree.rb_node; | |
208 | struct ipoib_path *path; | |
209 | int ret; | |
210 | ||
211 | while (n) { | |
212 | path = rb_entry(n, struct ipoib_path, rb_node); | |
213 | ||
37c22a77 | 214 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
215 | sizeof (union ib_gid)); |
216 | ||
217 | if (ret < 0) | |
218 | n = n->rb_left; | |
219 | else if (ret > 0) | |
220 | n = n->rb_right; | |
221 | else | |
222 | return path; | |
223 | } | |
224 | ||
225 | return NULL; | |
226 | } | |
227 | ||
228 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
229 | { | |
230 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
231 | struct rb_node **n = &priv->path_tree.rb_node; | |
232 | struct rb_node *pn = NULL; | |
233 | struct ipoib_path *tpath; | |
234 | int ret; | |
235 | ||
236 | while (*n) { | |
237 | pn = *n; | |
238 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
239 | ||
240 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
241 | sizeof (union ib_gid)); | |
242 | if (ret < 0) | |
243 | n = &pn->rb_left; | |
244 | else if (ret > 0) | |
245 | n = &pn->rb_right; | |
246 | else | |
247 | return -EEXIST; | |
248 | } | |
249 | ||
250 | rb_link_node(&path->rb_node, pn, n); | |
251 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
252 | ||
253 | list_add_tail(&path->list, &priv->path_list); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
259 | { | |
260 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
261 | struct ipoib_neigh *neigh, *tn; | |
262 | struct sk_buff *skb; | |
263 | unsigned long flags; | |
264 | ||
265 | while ((skb = __skb_dequeue(&path->queue))) | |
266 | dev_kfree_skb_irq(skb); | |
267 | ||
268 | spin_lock_irqsave(&priv->lock, flags); | |
269 | ||
270 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
271 | /* | |
272 | * It's safe to call ipoib_put_ah() inside priv->lock | |
273 | * here, because we know that path->ah will always | |
274 | * hold one more reference, so ipoib_put_ah() will | |
275 | * never do more than decrement the ref count. | |
276 | */ | |
277 | if (neigh->ah) | |
278 | ipoib_put_ah(neigh->ah); | |
d2e0655e | 279 | |
2745b5b7 | 280 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
281 | } |
282 | ||
283 | spin_unlock_irqrestore(&priv->lock, flags); | |
284 | ||
285 | if (path->ah) | |
286 | ipoib_put_ah(path->ah); | |
287 | ||
288 | kfree(path); | |
289 | } | |
290 | ||
1732b0ef RD |
291 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
292 | ||
293 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
294 | { | |
295 | struct ipoib_path_iter *iter; | |
296 | ||
297 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
298 | if (!iter) | |
299 | return NULL; | |
300 | ||
301 | iter->dev = dev; | |
302 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
303 | ||
304 | if (ipoib_path_iter_next(iter)) { | |
305 | kfree(iter); | |
306 | return NULL; | |
307 | } | |
308 | ||
309 | return iter; | |
310 | } | |
311 | ||
312 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
313 | { | |
314 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
315 | struct rb_node *n; | |
316 | struct ipoib_path *path; | |
317 | int ret = 1; | |
318 | ||
319 | spin_lock_irq(&priv->lock); | |
320 | ||
321 | n = rb_first(&priv->path_tree); | |
322 | ||
323 | while (n) { | |
324 | path = rb_entry(n, struct ipoib_path, rb_node); | |
325 | ||
326 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
327 | sizeof (union ib_gid)) < 0) { | |
328 | iter->path = *path; | |
329 | ret = 0; | |
330 | break; | |
331 | } | |
332 | ||
333 | n = rb_next(n); | |
334 | } | |
335 | ||
336 | spin_unlock_irq(&priv->lock); | |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
341 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
342 | struct ipoib_path *path) | |
343 | { | |
344 | *path = iter->path; | |
345 | } | |
346 | ||
347 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
348 | ||
1da177e4 LT |
349 | void ipoib_flush_paths(struct net_device *dev) |
350 | { | |
351 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
352 | struct ipoib_path *path, *tp; | |
353 | LIST_HEAD(remove_list); | |
1da177e4 | 354 | |
9217b27b MT |
355 | spin_lock_irq(&priv->tx_lock); |
356 | spin_lock(&priv->lock); | |
1da177e4 LT |
357 | |
358 | list_splice(&priv->path_list, &remove_list); | |
359 | INIT_LIST_HEAD(&priv->path_list); | |
360 | ||
361 | list_for_each_entry(path, &remove_list, list) | |
362 | rb_erase(&path->rb_node, &priv->path_tree); | |
363 | ||
1da177e4 LT |
364 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
365 | if (path->query) | |
366 | ib_sa_cancel_query(path->query_id, path->query); | |
9217b27b MT |
367 | spin_unlock(&priv->lock); |
368 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
369 | wait_for_completion(&path->done); |
370 | path_free(dev, path); | |
9217b27b MT |
371 | spin_lock_irq(&priv->tx_lock); |
372 | spin_lock(&priv->lock); | |
1da177e4 | 373 | } |
9217b27b MT |
374 | spin_unlock(&priv->lock); |
375 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
376 | } |
377 | ||
378 | static void path_rec_completion(int status, | |
379 | struct ib_sa_path_rec *pathrec, | |
380 | void *path_ptr) | |
381 | { | |
382 | struct ipoib_path *path = path_ptr; | |
383 | struct net_device *dev = path->dev; | |
384 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
385 | struct ipoib_ah *ah = NULL; | |
d04d01b1 | 386 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
387 | struct sk_buff_head skqueue; |
388 | struct sk_buff *skb; | |
389 | unsigned long flags; | |
390 | ||
843613b0 | 391 | if (!status) |
1da177e4 LT |
392 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", |
393 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); | |
394 | else | |
395 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", | |
396 | status, IPOIB_GID_ARG(path->pathrec.dgid)); | |
397 | ||
398 | skb_queue_head_init(&skqueue); | |
399 | ||
400 | if (!status) { | |
46f1b3d7 SH |
401 | struct ib_ah_attr av; |
402 | ||
403 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
404 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
405 | } |
406 | ||
407 | spin_lock_irqsave(&priv->lock, flags); | |
408 | ||
409 | path->ah = ah; | |
410 | ||
411 | if (ah) { | |
412 | path->pathrec = *pathrec; | |
413 | ||
414 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", | |
415 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
416 | ||
417 | while ((skb = __skb_dequeue(&path->queue))) | |
418 | __skb_queue_tail(&skqueue, skb); | |
419 | ||
d04d01b1 | 420 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
1da177e4 LT |
421 | kref_get(&path->ah->ref); |
422 | neigh->ah = path->ah; | |
8a7f7521 MT |
423 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
424 | sizeof(union ib_gid)); | |
1da177e4 | 425 | |
839fcaba MT |
426 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
427 | if (!ipoib_cm_get(neigh)) | |
428 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
429 | path, | |
430 | neigh)); | |
431 | if (!ipoib_cm_get(neigh)) { | |
432 | list_del(&neigh->list); | |
433 | if (neigh->ah) | |
434 | ipoib_put_ah(neigh->ah); | |
435 | ipoib_neigh_free(dev, neigh); | |
436 | continue; | |
437 | } | |
438 | } | |
439 | ||
1da177e4 LT |
440 | while ((skb = __skb_dequeue(&neigh->queue))) |
441 | __skb_queue_tail(&skqueue, skb); | |
442 | } | |
5872a9fc | 443 | } |
1da177e4 | 444 | |
5872a9fc | 445 | path->query = NULL; |
1da177e4 LT |
446 | complete(&path->done); |
447 | ||
448 | spin_unlock_irqrestore(&priv->lock, flags); | |
449 | ||
450 | while ((skb = __skb_dequeue(&skqueue))) { | |
451 | skb->dev = dev; | |
452 | if (dev_queue_xmit(skb)) | |
453 | ipoib_warn(priv, "dev_queue_xmit failed " | |
454 | "to requeue packet\n"); | |
455 | } | |
456 | } | |
457 | ||
37c22a77 | 458 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
459 | { |
460 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
461 | struct ipoib_path *path; | |
462 | ||
1401b53a JM |
463 | if (!priv->broadcast) |
464 | return NULL; | |
465 | ||
21a38489 | 466 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
467 | if (!path) |
468 | return NULL; | |
469 | ||
21a38489 | 470 | path->dev = dev; |
1da177e4 LT |
471 | |
472 | skb_queue_head_init(&path->queue); | |
473 | ||
474 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 475 | |
37c22a77 | 476 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
81668838 SH |
477 | path->pathrec.sgid = priv->local_gid; |
478 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
479 | path->pathrec.numb_path = 1; | |
480 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
481 | |
482 | return path; | |
483 | } | |
484 | ||
485 | static int path_rec_start(struct net_device *dev, | |
486 | struct ipoib_path *path) | |
487 | { | |
488 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
489 | ||
490 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", | |
491 | IPOIB_GID_ARG(path->pathrec.dgid)); | |
492 | ||
65c7edda RD |
493 | init_completion(&path->done); |
494 | ||
1da177e4 | 495 | path->query_id = |
c1a0b23b | 496 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
497 | &path->pathrec, |
498 | IB_SA_PATH_REC_DGID | | |
499 | IB_SA_PATH_REC_SGID | | |
500 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 501 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
502 | IB_SA_PATH_REC_PKEY, |
503 | 1000, GFP_ATOMIC, | |
504 | path_rec_completion, | |
505 | path, &path->query); | |
506 | if (path->query_id < 0) { | |
507 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); | |
508 | path->query = NULL; | |
509 | return path->query_id; | |
510 | } | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
516 | { | |
517 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
518 | struct ipoib_path *path; | |
519 | struct ipoib_neigh *neigh; | |
520 | ||
732a2170 | 521 | neigh = ipoib_neigh_alloc(skb->dst->neighbour, skb->dev); |
1da177e4 | 522 | if (!neigh) { |
de903512 | 523 | ++dev->stats.tx_dropped; |
1da177e4 LT |
524 | dev_kfree_skb_any(skb); |
525 | return; | |
526 | } | |
527 | ||
1da177e4 LT |
528 | /* |
529 | * We can only be called from ipoib_start_xmit, so we're | |
530 | * inside tx_lock -- no need to save/restore flags. | |
531 | */ | |
532 | spin_lock(&priv->lock); | |
533 | ||
37c22a77 | 534 | path = __path_find(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 535 | if (!path) { |
37c22a77 | 536 | path = path_rec_create(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 537 | if (!path) |
d2e0655e | 538 | goto err_path; |
1da177e4 LT |
539 | |
540 | __path_add(dev, path); | |
541 | } | |
542 | ||
543 | list_add_tail(&neigh->list, &path->neigh_list); | |
544 | ||
47f7a071 | 545 | if (path->ah) { |
1da177e4 LT |
546 | kref_get(&path->ah->ref); |
547 | neigh->ah = path->ah; | |
8a7f7521 MT |
548 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
549 | sizeof(union ib_gid)); | |
1da177e4 | 550 | |
839fcaba MT |
551 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
552 | if (!ipoib_cm_get(neigh)) | |
553 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
554 | if (!ipoib_cm_get(neigh)) { | |
555 | list_del(&neigh->list); | |
556 | if (neigh->ah) | |
557 | ipoib_put_ah(neigh->ah); | |
558 | ipoib_neigh_free(dev, neigh); | |
559 | goto err_drop; | |
560 | } | |
561 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
562 | __skb_queue_tail(&neigh->queue, skb); | |
563 | else { | |
564 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
565 | skb_queue_len(&neigh->queue)); | |
566 | goto err_drop; | |
567 | } | |
568 | } else | |
569 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha)); | |
1da177e4 LT |
570 | } else { |
571 | neigh->ah = NULL; | |
1da177e4 LT |
572 | |
573 | if (!path->query && path_rec_start(dev, path)) | |
d2e0655e | 574 | goto err_list; |
2745b5b7 MT |
575 | |
576 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
577 | } |
578 | ||
579 | spin_unlock(&priv->lock); | |
580 | return; | |
581 | ||
d2e0655e | 582 | err_list: |
1da177e4 | 583 | list_del(&neigh->list); |
1da177e4 | 584 | |
d2e0655e | 585 | err_path: |
2745b5b7 | 586 | ipoib_neigh_free(dev, neigh); |
839fcaba | 587 | err_drop: |
de903512 | 588 | ++dev->stats.tx_dropped; |
1da177e4 LT |
589 | dev_kfree_skb_any(skb); |
590 | ||
591 | spin_unlock(&priv->lock); | |
592 | } | |
593 | ||
d70ed607 | 594 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
595 | { |
596 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
597 | ||
598 | /* Look up path record for unicasts */ | |
599 | if (skb->dst->neighbour->ha[4] != 0xff) { | |
600 | neigh_add_path(skb, dev); | |
601 | return; | |
602 | } | |
603 | ||
604 | /* Add in the P_Key for multicasts */ | |
605 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; | |
606 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; | |
37c22a77 | 607 | ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb); |
1da177e4 LT |
608 | } |
609 | ||
610 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
611 | struct ipoib_pseudoheader *phdr) | |
612 | { | |
613 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
614 | struct ipoib_path *path; | |
615 | ||
616 | /* | |
617 | * We can only be called from ipoib_start_xmit, so we're | |
618 | * inside tx_lock -- no need to save/restore flags. | |
619 | */ | |
620 | spin_lock(&priv->lock); | |
621 | ||
37c22a77 | 622 | path = __path_find(dev, phdr->hwaddr + 4); |
1da177e4 | 623 | if (!path) { |
37c22a77 | 624 | path = path_rec_create(dev, phdr->hwaddr + 4); |
1da177e4 LT |
625 | if (path) { |
626 | /* put pseudoheader back on for next time */ | |
627 | skb_push(skb, sizeof *phdr); | |
628 | __skb_queue_tail(&path->queue, skb); | |
629 | ||
630 | if (path_rec_start(dev, path)) { | |
631 | spin_unlock(&priv->lock); | |
632 | path_free(dev, path); | |
633 | return; | |
634 | } else | |
635 | __path_add(dev, path); | |
636 | } else { | |
de903512 | 637 | ++dev->stats.tx_dropped; |
1da177e4 LT |
638 | dev_kfree_skb_any(skb); |
639 | } | |
640 | ||
641 | spin_unlock(&priv->lock); | |
642 | return; | |
643 | } | |
644 | ||
47f7a071 | 645 | if (path->ah) { |
1da177e4 LT |
646 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
647 | be16_to_cpu(path->pathrec.dlid)); | |
648 | ||
073ae841 | 649 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); |
1da177e4 LT |
650 | } else if ((path->query || !path_rec_start(dev, path)) && |
651 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
652 | /* put pseudoheader back on for next time */ | |
653 | skb_push(skb, sizeof *phdr); | |
654 | __skb_queue_tail(&path->queue, skb); | |
655 | } else { | |
de903512 | 656 | ++dev->stats.tx_dropped; |
1da177e4 LT |
657 | dev_kfree_skb_any(skb); |
658 | } | |
659 | ||
660 | spin_unlock(&priv->lock); | |
661 | } | |
662 | ||
663 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
664 | { | |
665 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
666 | struct ipoib_neigh *neigh; | |
667 | unsigned long flags; | |
668 | ||
a8bfca02 | 669 | if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags))) |
1da177e4 | 670 | return NETDEV_TX_LOCKED; |
1da177e4 LT |
671 | |
672 | /* | |
673 | * Check if our queue is stopped. Since we have the LLTX bit | |
674 | * set, we can't rely on netif_stop_queue() preventing our | |
675 | * xmit function from being called with a full queue. | |
676 | */ | |
677 | if (unlikely(netif_queue_stopped(dev))) { | |
678 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
679 | return NETDEV_TX_BUSY; | |
680 | } | |
681 | ||
a8bfca02 | 682 | if (likely(skb->dst && skb->dst->neighbour)) { |
1da177e4 | 683 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { |
d70ed607 | 684 | ipoib_path_lookup(skb, dev); |
1da177e4 LT |
685 | goto out; |
686 | } | |
687 | ||
688 | neigh = *to_ipoib_neigh(skb->dst->neighbour); | |
689 | ||
839fcaba MT |
690 | if (ipoib_cm_get(neigh)) { |
691 | if (ipoib_cm_up(neigh)) { | |
692 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
693 | goto out; | |
694 | } | |
695 | } else if (neigh->ah) { | |
200d1713 | 696 | if (unlikely((memcmp(&neigh->dgid.raw, |
8a7f7521 | 697 | skb->dst->neighbour->ha + 4, |
200d1713 MS |
698 | sizeof(union ib_gid))) || |
699 | (neigh->dev != dev))) { | |
8a7f7521 MT |
700 | spin_lock(&priv->lock); |
701 | /* | |
702 | * It's safe to call ipoib_put_ah() inside | |
703 | * priv->lock here, because we know that | |
704 | * path->ah will always hold one more reference, | |
705 | * so ipoib_put_ah() will never do more than | |
706 | * decrement the ref count. | |
707 | */ | |
708 | ipoib_put_ah(neigh->ah); | |
709 | list_del(&neigh->list); | |
2745b5b7 | 710 | ipoib_neigh_free(dev, neigh); |
8a7f7521 MT |
711 | spin_unlock(&priv->lock); |
712 | ipoib_path_lookup(skb, dev); | |
713 | goto out; | |
714 | } | |
715 | ||
073ae841 | 716 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha)); |
1da177e4 LT |
717 | goto out; |
718 | } | |
719 | ||
720 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
721 | spin_lock(&priv->lock); | |
722 | __skb_queue_tail(&neigh->queue, skb); | |
723 | spin_unlock(&priv->lock); | |
724 | } else { | |
de903512 | 725 | ++dev->stats.tx_dropped; |
1da177e4 LT |
726 | dev_kfree_skb_any(skb); |
727 | } | |
728 | } else { | |
729 | struct ipoib_pseudoheader *phdr = | |
730 | (struct ipoib_pseudoheader *) skb->data; | |
731 | skb_pull(skb, sizeof *phdr); | |
732 | ||
733 | if (phdr->hwaddr[4] == 0xff) { | |
734 | /* Add in the P_Key for multicast*/ | |
735 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
736 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
737 | ||
37c22a77 | 738 | ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); |
1da177e4 | 739 | } else { |
0dca0f7b | 740 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 741 | |
0dca0f7b HR |
742 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
743 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
1da177e4 LT |
744 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
745 | IPOIB_GID_FMT "\n", | |
746 | skb->dst ? "neigh" : "dst", | |
97f52eb4 | 747 | be16_to_cpup((__be16 *) skb->data), |
073ae841 | 748 | IPOIB_QPN(phdr->hwaddr), |
37c22a77 | 749 | IPOIB_GID_RAW_ARG(phdr->hwaddr + 4)); |
1da177e4 | 750 | dev_kfree_skb_any(skb); |
de903512 | 751 | ++dev->stats.tx_dropped; |
1da177e4 LT |
752 | goto out; |
753 | } | |
754 | ||
755 | unicast_arp_send(skb, dev, phdr); | |
756 | } | |
757 | } | |
758 | ||
759 | out: | |
760 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
761 | ||
762 | return NETDEV_TX_OK; | |
763 | } | |
764 | ||
1da177e4 LT |
765 | static void ipoib_timeout(struct net_device *dev) |
766 | { | |
767 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
768 | ||
4b2d319b RD |
769 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
770 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
771 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
772 | netif_queue_stopped(dev), | |
773 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
774 | /* XXX reset QP, etc. */ |
775 | } | |
776 | ||
777 | static int ipoib_hard_header(struct sk_buff *skb, | |
778 | struct net_device *dev, | |
779 | unsigned short type, | |
3b04ddde | 780 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
781 | { |
782 | struct ipoib_header *header; | |
783 | ||
784 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
785 | ||
786 | header->proto = htons(type); | |
787 | header->reserved = 0; | |
788 | ||
789 | /* | |
790 | * If we don't have a neighbour structure, stuff the | |
791 | * destination address onto the front of the skb so we can | |
792 | * figure out where to send the packet later. | |
793 | */ | |
ef12d456 | 794 | if ((!skb->dst || !skb->dst->neighbour) && daddr) { |
1da177e4 LT |
795 | struct ipoib_pseudoheader *phdr = |
796 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
797 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
798 | } | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | static void ipoib_set_mcast_list(struct net_device *dev) | |
804 | { | |
805 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
806 | ||
7a343d4c LA |
807 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
808 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
809 | return; | |
810 | } | |
811 | ||
1ad62a19 | 812 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
813 | } |
814 | ||
ecbb4169 | 815 | static void ipoib_neigh_cleanup(struct neighbour *n) |
1da177e4 LT |
816 | { |
817 | struct ipoib_neigh *neigh; | |
818 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
819 | unsigned long flags; | |
820 | struct ipoib_ah *ah = NULL; | |
821 | ||
732a2170 MS |
822 | neigh = *to_ipoib_neigh(n); |
823 | if (neigh) { | |
824 | priv = netdev_priv(neigh->dev); | |
825 | ipoib_dbg(priv, "neigh_destructor for bonding device: %s\n", | |
826 | n->dev->name); | |
827 | } else | |
828 | return; | |
1da177e4 | 829 | ipoib_dbg(priv, |
ecbb4169 | 830 | "neigh_cleanup for %06x " IPOIB_GID_FMT "\n", |
073ae841 | 831 | IPOIB_QPN(n->ha), |
37c22a77 | 832 | IPOIB_GID_RAW_ARG(n->ha + 4)); |
1da177e4 LT |
833 | |
834 | spin_lock_irqsave(&priv->lock, flags); | |
835 | ||
732a2170 MS |
836 | if (neigh->ah) |
837 | ah = neigh->ah; | |
838 | list_del(&neigh->list); | |
839 | ipoib_neigh_free(n->dev, neigh); | |
1da177e4 LT |
840 | |
841 | spin_unlock_irqrestore(&priv->lock, flags); | |
842 | ||
843 | if (ah) | |
844 | ipoib_put_ah(ah); | |
845 | } | |
846 | ||
732a2170 MS |
847 | struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour, |
848 | struct net_device *dev) | |
d2e0655e MT |
849 | { |
850 | struct ipoib_neigh *neigh; | |
851 | ||
852 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
853 | if (!neigh) | |
854 | return NULL; | |
855 | ||
856 | neigh->neighbour = neighbour; | |
732a2170 | 857 | neigh->dev = dev; |
d2e0655e | 858 | *to_ipoib_neigh(neighbour) = neigh; |
82b39913 | 859 | skb_queue_head_init(&neigh->queue); |
839fcaba | 860 | ipoib_cm_set(neigh, NULL); |
d2e0655e MT |
861 | |
862 | return neigh; | |
863 | } | |
864 | ||
2745b5b7 | 865 | void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh) |
d2e0655e | 866 | { |
2745b5b7 | 867 | struct sk_buff *skb; |
d2e0655e | 868 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
2745b5b7 | 869 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 870 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
871 | dev_kfree_skb_any(skb); |
872 | } | |
839fcaba MT |
873 | if (ipoib_cm_get(neigh)) |
874 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
d2e0655e MT |
875 | kfree(neigh); |
876 | } | |
877 | ||
1da177e4 LT |
878 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
879 | { | |
ecbb4169 | 880 | parms->neigh_cleanup = ipoib_neigh_cleanup; |
1da177e4 LT |
881 | |
882 | return 0; | |
883 | } | |
884 | ||
885 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
886 | { | |
887 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
888 | ||
889 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 890 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
891 | GFP_KERNEL); |
892 | if (!priv->rx_ring) { | |
893 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 894 | ca->name, ipoib_recvq_size); |
1da177e4 LT |
895 | goto out; |
896 | } | |
1da177e4 | 897 | |
0f485251 | 898 | priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, |
1da177e4 LT |
899 | GFP_KERNEL); |
900 | if (!priv->tx_ring) { | |
901 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 902 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
903 | goto out_rx_ring_cleanup; |
904 | } | |
1da177e4 | 905 | |
1b524963 | 906 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
907 | |
908 | if (ipoib_ib_dev_init(dev, ca, port)) | |
909 | goto out_tx_ring_cleanup; | |
910 | ||
911 | return 0; | |
912 | ||
913 | out_tx_ring_cleanup: | |
914 | kfree(priv->tx_ring); | |
915 | ||
916 | out_rx_ring_cleanup: | |
917 | kfree(priv->rx_ring); | |
918 | ||
919 | out: | |
920 | return -ENOMEM; | |
921 | } | |
922 | ||
923 | void ipoib_dev_cleanup(struct net_device *dev) | |
924 | { | |
925 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
926 | ||
1732b0ef | 927 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
928 | |
929 | /* Delete any child interfaces first */ | |
930 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
931 | unregister_netdev(cpriv->dev); | |
932 | ipoib_dev_cleanup(cpriv->dev); | |
933 | free_netdev(cpriv->dev); | |
934 | } | |
935 | ||
936 | ipoib_ib_dev_cleanup(dev); | |
937 | ||
92a6b34b HR |
938 | kfree(priv->rx_ring); |
939 | kfree(priv->tx_ring); | |
1da177e4 | 940 | |
92a6b34b HR |
941 | priv->rx_ring = NULL; |
942 | priv->tx_ring = NULL; | |
1da177e4 LT |
943 | } |
944 | ||
3b04ddde SH |
945 | static const struct header_ops ipoib_header_ops = { |
946 | .create = ipoib_hard_header, | |
947 | }; | |
948 | ||
1da177e4 LT |
949 | static void ipoib_setup(struct net_device *dev) |
950 | { | |
951 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
952 | ||
953 | dev->open = ipoib_open; | |
954 | dev->stop = ipoib_stop; | |
955 | dev->change_mtu = ipoib_change_mtu; | |
956 | dev->hard_start_xmit = ipoib_start_xmit; | |
1da177e4 | 957 | dev->tx_timeout = ipoib_timeout; |
3b04ddde | 958 | dev->header_ops = &ipoib_header_ops; |
1da177e4 LT |
959 | dev->set_multicast_list = ipoib_set_mcast_list; |
960 | dev->neigh_setup = ipoib_neigh_setup_dev; | |
bea3348e SH |
961 | |
962 | netif_napi_add(dev, &priv->napi, ipoib_poll, 100); | |
1da177e4 LT |
963 | |
964 | dev->watchdog_timeo = HZ; | |
965 | ||
1da177e4 LT |
966 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
967 | ||
968 | /* | |
969 | * We add in INFINIBAND_ALEN to allow for the destination | |
970 | * address "pseudoheader" for skbs without neighbour struct. | |
971 | */ | |
972 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; | |
973 | dev->addr_len = INFINIBAND_ALEN; | |
974 | dev->type = ARPHRD_INFINIBAND; | |
0f485251 | 975 | dev->tx_queue_len = ipoib_sendq_size * 2; |
1da177e4 LT |
976 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; |
977 | ||
978 | /* MTU will be reset when mcast join happens */ | |
979 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; | |
980 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; | |
981 | ||
982 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); | |
983 | ||
984 | netif_carrier_off(dev); | |
985 | ||
1da177e4 LT |
986 | priv->dev = dev; |
987 | ||
988 | spin_lock_init(&priv->lock); | |
989 | spin_lock_init(&priv->tx_lock); | |
990 | ||
95ed644f IM |
991 | mutex_init(&priv->mcast_mutex); |
992 | mutex_init(&priv->vlan_mutex); | |
1da177e4 LT |
993 | |
994 | INIT_LIST_HEAD(&priv->path_list); | |
995 | INIT_LIST_HEAD(&priv->child_intfs); | |
996 | INIT_LIST_HEAD(&priv->dead_ahs); | |
997 | INIT_LIST_HEAD(&priv->multicast_list); | |
998 | ||
26bbf13c YE |
999 | INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); |
1000 | INIT_WORK(&priv->pkey_event_task, ipoib_pkey_event); | |
c4028958 DH |
1001 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
1002 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush); | |
1003 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); | |
1004 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1008 | { | |
1009 | struct net_device *dev; | |
1010 | ||
1011 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
1012 | ipoib_setup); | |
1013 | if (!dev) | |
1014 | return NULL; | |
1015 | ||
1016 | return netdev_priv(dev); | |
1017 | } | |
1018 | ||
43cb76d9 GKH |
1019 | static ssize_t show_pkey(struct device *dev, |
1020 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1021 | { |
43cb76d9 | 1022 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1023 | |
1024 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1025 | } | |
43cb76d9 | 1026 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1027 | |
335a64a5 OG |
1028 | static ssize_t show_umcast(struct device *dev, |
1029 | struct device_attribute *attr, char *buf) | |
1030 | { | |
1031 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1032 | ||
1033 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1034 | } | |
1035 | ||
1036 | static ssize_t set_umcast(struct device *dev, | |
1037 | struct device_attribute *attr, | |
1038 | const char *buf, size_t count) | |
1039 | { | |
1040 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1041 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1042 | ||
1043 | if (umcast_val > 0) { | |
1044 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1045 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1046 | "by userspace\n"); | |
1047 | } else | |
1048 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1049 | ||
1050 | return count; | |
1051 | } | |
1052 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1053 | ||
1054 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1055 | { | |
1056 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1057 | } | |
1058 | ||
43cb76d9 GKH |
1059 | static ssize_t create_child(struct device *dev, |
1060 | struct device_attribute *attr, | |
1da177e4 LT |
1061 | const char *buf, size_t count) |
1062 | { | |
1063 | int pkey; | |
1064 | int ret; | |
1065 | ||
1066 | if (sscanf(buf, "%i", &pkey) != 1) | |
1067 | return -EINVAL; | |
1068 | ||
1069 | if (pkey < 0 || pkey > 0xffff) | |
1070 | return -EINVAL; | |
1071 | ||
4ce05937 RD |
1072 | /* |
1073 | * Set the full membership bit, so that we join the right | |
1074 | * broadcast group, etc. | |
1075 | */ | |
1076 | pkey |= 0x8000; | |
1077 | ||
43cb76d9 | 1078 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1079 | |
1080 | return ret ? ret : count; | |
1081 | } | |
43cb76d9 | 1082 | static DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); |
1da177e4 | 1083 | |
43cb76d9 GKH |
1084 | static ssize_t delete_child(struct device *dev, |
1085 | struct device_attribute *attr, | |
1da177e4 LT |
1086 | const char *buf, size_t count) |
1087 | { | |
1088 | int pkey; | |
1089 | int ret; | |
1090 | ||
1091 | if (sscanf(buf, "%i", &pkey) != 1) | |
1092 | return -EINVAL; | |
1093 | ||
1094 | if (pkey < 0 || pkey > 0xffff) | |
1095 | return -EINVAL; | |
1096 | ||
43cb76d9 | 1097 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1098 | |
1099 | return ret ? ret : count; | |
1100 | ||
1101 | } | |
43cb76d9 | 1102 | static DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); |
1da177e4 LT |
1103 | |
1104 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1105 | { | |
43cb76d9 | 1106 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1107 | } |
1108 | ||
1109 | static struct net_device *ipoib_add_port(const char *format, | |
1110 | struct ib_device *hca, u8 port) | |
1111 | { | |
1112 | struct ipoib_dev_priv *priv; | |
1113 | int result = -ENOMEM; | |
1114 | ||
1115 | priv = ipoib_intf_alloc(format); | |
1116 | if (!priv) | |
1117 | goto alloc_mem_failed; | |
1118 | ||
1119 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
1120 | ||
1121 | result = ib_query_pkey(hca, port, 0, &priv->pkey); | |
1122 | if (result) { | |
1123 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1124 | hca->name, port, result); | |
ca6de177 | 1125 | goto device_init_failed; |
1da177e4 LT |
1126 | } |
1127 | ||
4ce05937 RD |
1128 | /* |
1129 | * Set the full membership bit, so that we join the right | |
1130 | * broadcast group, etc. | |
1131 | */ | |
1132 | priv->pkey |= 0x8000; | |
1133 | ||
1da177e4 LT |
1134 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1135 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1136 | ||
1137 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1138 | if (result) { | |
1139 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1140 | hca->name, port, result); | |
ca6de177 | 1141 | goto device_init_failed; |
1da177e4 LT |
1142 | } else |
1143 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1144 | ||
1145 | ||
1146 | result = ipoib_dev_init(priv->dev, hca, port); | |
1147 | if (result < 0) { | |
1148 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1149 | hca->name, port, result); | |
1150 | goto device_init_failed; | |
1151 | } | |
1152 | ||
1153 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1154 | priv->ca, ipoib_event); | |
1155 | result = ib_register_event_handler(&priv->event_handler); | |
1156 | if (result < 0) { | |
1157 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1158 | "port %d (ret = %d)\n", | |
1159 | hca->name, port, result); | |
1160 | goto event_failed; | |
1161 | } | |
1162 | ||
1163 | result = register_netdev(priv->dev); | |
1164 | if (result) { | |
1165 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1166 | hca->name, port, result); | |
1167 | goto register_failed; | |
1168 | } | |
1169 | ||
1732b0ef | 1170 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1171 | |
839fcaba MT |
1172 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1173 | goto sysfs_failed; | |
1da177e4 LT |
1174 | if (ipoib_add_pkey_attr(priv->dev)) |
1175 | goto sysfs_failed; | |
335a64a5 OG |
1176 | if (ipoib_add_umcast_attr(priv->dev)) |
1177 | goto sysfs_failed; | |
43cb76d9 | 1178 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1179 | goto sysfs_failed; |
43cb76d9 | 1180 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1181 | goto sysfs_failed; |
1182 | ||
1183 | return priv->dev; | |
1184 | ||
1185 | sysfs_failed: | |
1732b0ef | 1186 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1187 | unregister_netdev(priv->dev); |
1188 | ||
1189 | register_failed: | |
1190 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1191 | flush_scheduled_work(); |
1da177e4 LT |
1192 | |
1193 | event_failed: | |
1194 | ipoib_dev_cleanup(priv->dev); | |
1195 | ||
1196 | device_init_failed: | |
1197 | free_netdev(priv->dev); | |
1198 | ||
1199 | alloc_mem_failed: | |
1200 | return ERR_PTR(result); | |
1201 | } | |
1202 | ||
1203 | static void ipoib_add_one(struct ib_device *device) | |
1204 | { | |
1205 | struct list_head *dev_list; | |
1206 | struct net_device *dev; | |
1207 | struct ipoib_dev_priv *priv; | |
1208 | int s, e, p; | |
1209 | ||
07ebafba TT |
1210 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1211 | return; | |
1212 | ||
1da177e4 LT |
1213 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1214 | if (!dev_list) | |
1215 | return; | |
1216 | ||
1217 | INIT_LIST_HEAD(dev_list); | |
1218 | ||
07ebafba | 1219 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1220 | s = 0; |
1221 | e = 0; | |
1222 | } else { | |
1223 | s = 1; | |
1224 | e = device->phys_port_cnt; | |
1225 | } | |
1226 | ||
1227 | for (p = s; p <= e; ++p) { | |
1228 | dev = ipoib_add_port("ib%d", device, p); | |
1229 | if (!IS_ERR(dev)) { | |
1230 | priv = netdev_priv(dev); | |
1231 | list_add_tail(&priv->list, dev_list); | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1236 | } | |
1237 | ||
1238 | static void ipoib_remove_one(struct ib_device *device) | |
1239 | { | |
1240 | struct ipoib_dev_priv *priv, *tmp; | |
1241 | struct list_head *dev_list; | |
1242 | ||
07ebafba TT |
1243 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1244 | return; | |
1245 | ||
1da177e4 LT |
1246 | dev_list = ib_get_client_data(device, &ipoib_client); |
1247 | ||
1248 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1249 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1250 | flush_scheduled_work(); |
1da177e4 LT |
1251 | |
1252 | unregister_netdev(priv->dev); | |
1253 | ipoib_dev_cleanup(priv->dev); | |
1254 | free_netdev(priv->dev); | |
1255 | } | |
06c56e44 MT |
1256 | |
1257 | kfree(dev_list); | |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | static int __init ipoib_init_module(void) | |
1261 | { | |
1262 | int ret; | |
1263 | ||
0f485251 SM |
1264 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1265 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1266 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1267 | ||
1268 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1269 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
1270 | ipoib_sendq_size = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE); | |
1271 | ||
1da177e4 LT |
1272 | ret = ipoib_register_debugfs(); |
1273 | if (ret) | |
1274 | return ret; | |
1275 | ||
1276 | /* | |
1277 | * We create our own workqueue mainly because we want to be | |
1278 | * able to flush it when devices are being removed. We can't | |
1279 | * use schedule_work()/flush_scheduled_work() because both | |
1280 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1281 | * so flush_scheduled_work() can deadlock during device | |
1282 | * removal. | |
1283 | */ | |
1284 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1285 | if (!ipoib_workqueue) { | |
1286 | ret = -ENOMEM; | |
1287 | goto err_fs; | |
1288 | } | |
1289 | ||
c1a0b23b MT |
1290 | ib_sa_register_client(&ipoib_sa_client); |
1291 | ||
1da177e4 LT |
1292 | ret = ib_register_client(&ipoib_client); |
1293 | if (ret) | |
c1a0b23b | 1294 | goto err_sa; |
1da177e4 LT |
1295 | |
1296 | return 0; | |
1297 | ||
c1a0b23b MT |
1298 | err_sa: |
1299 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1300 | destroy_workqueue(ipoib_workqueue); |
1301 | ||
9adec1a8 RD |
1302 | err_fs: |
1303 | ipoib_unregister_debugfs(); | |
1304 | ||
1da177e4 LT |
1305 | return ret; |
1306 | } | |
1307 | ||
1308 | static void __exit ipoib_cleanup_module(void) | |
1309 | { | |
1da177e4 | 1310 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1311 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1312 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1313 | destroy_workqueue(ipoib_workqueue); |
1314 | } | |
1315 | ||
1316 | module_init(ipoib_init_module); | |
1317 | module_exit(ipoib_cleanup_module); |