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. | |
1da177e4 LT |
33 | */ |
34 | ||
35 | #include "ipoib.h" | |
36 | ||
1da177e4 LT |
37 | #include <linux/module.h> |
38 | ||
39 | #include <linux/init.h> | |
40 | #include <linux/slab.h> | |
0f485251 | 41 | #include <linux/kernel.h> |
10313cbb | 42 | #include <linux/vmalloc.h> |
1da177e4 LT |
43 | |
44 | #include <linux/if_arp.h> /* For ARPHRD_xxx */ | |
45 | ||
46 | #include <linux/ip.h> | |
47 | #include <linux/in.h> | |
48 | ||
14c85021 ACM |
49 | #include <net/dst.h> |
50 | ||
1da177e4 LT |
51 | MODULE_AUTHOR("Roland Dreier"); |
52 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
53 | MODULE_LICENSE("Dual BSD/GPL"); | |
54 | ||
0f485251 SM |
55 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
56 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
57 | ||
58 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
59 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
60 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
61 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
62 | ||
1da177e4 LT |
63 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
64 | int ipoib_debug_level; | |
65 | ||
66 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
67 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
68 | #endif | |
69 | ||
1732b0ef RD |
70 | struct ipoib_path_iter { |
71 | struct net_device *dev; | |
72 | struct ipoib_path path; | |
73 | }; | |
74 | ||
1da177e4 LT |
75 | static const u8 ipv4_bcast_addr[] = { |
76 | 0x00, 0xff, 0xff, 0xff, | |
77 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
78 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
79 | }; | |
80 | ||
81 | struct workqueue_struct *ipoib_workqueue; | |
82 | ||
c1a0b23b MT |
83 | struct ib_sa_client ipoib_sa_client; |
84 | ||
1da177e4 LT |
85 | static void ipoib_add_one(struct ib_device *device); |
86 | static void ipoib_remove_one(struct ib_device *device); | |
87 | ||
88 | static struct ib_client ipoib_client = { | |
89 | .name = "ipoib", | |
90 | .add = ipoib_add_one, | |
91 | .remove = ipoib_remove_one | |
92 | }; | |
93 | ||
94 | int ipoib_open(struct net_device *dev) | |
95 | { | |
96 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
97 | ||
98 | ipoib_dbg(priv, "bringing up interface\n"); | |
99 | ||
e028cc55 | 100 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
1da177e4 LT |
101 | |
102 | if (ipoib_pkey_dev_delay_open(dev)) | |
103 | return 0; | |
104 | ||
b8a1b1ce RD |
105 | if (ipoib_ib_dev_open(dev)) |
106 | goto err_disable; | |
fe25c561 | 107 | |
b8a1b1ce RD |
108 | if (ipoib_ib_dev_up(dev)) |
109 | goto err_stop; | |
1da177e4 LT |
110 | |
111 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
112 | struct ipoib_dev_priv *cpriv; | |
113 | ||
114 | /* Bring up any child interfaces too */ | |
95ed644f | 115 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
116 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
117 | int flags; | |
118 | ||
119 | flags = cpriv->dev->flags; | |
120 | if (flags & IFF_UP) | |
121 | continue; | |
122 | ||
123 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
124 | } | |
95ed644f | 125 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
126 | } |
127 | ||
128 | netif_start_queue(dev); | |
129 | ||
130 | return 0; | |
b8a1b1ce RD |
131 | |
132 | err_stop: | |
133 | ipoib_ib_dev_stop(dev, 1); | |
134 | ||
135 | err_disable: | |
b8a1b1ce RD |
136 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
137 | ||
138 | return -EINVAL; | |
1da177e4 LT |
139 | } |
140 | ||
141 | static int ipoib_stop(struct net_device *dev) | |
142 | { | |
143 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
144 | ||
145 | ipoib_dbg(priv, "stopping interface\n"); | |
146 | ||
147 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
148 | ||
149 | netif_stop_queue(dev); | |
150 | ||
a77a57a1 RD |
151 | ipoib_ib_dev_down(dev, 0); |
152 | ipoib_ib_dev_stop(dev, 0); | |
1da177e4 LT |
153 | |
154 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
155 | struct ipoib_dev_priv *cpriv; | |
156 | ||
157 | /* Bring down any child interfaces too */ | |
95ed644f | 158 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
159 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
160 | int flags; | |
161 | ||
162 | flags = cpriv->dev->flags; | |
163 | if (!(flags & IFF_UP)) | |
164 | continue; | |
165 | ||
166 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
167 | } | |
95ed644f | 168 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
169 | } |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
3d96c74d MM |
174 | static u32 ipoib_fix_features(struct net_device *dev, u32 features) |
175 | { | |
176 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
177 | ||
178 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
179 | features &= ~(NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO); | |
180 | ||
181 | return features; | |
182 | } | |
183 | ||
1da177e4 LT |
184 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
185 | { | |
186 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
187 | ||
839fcaba | 188 | /* dev->mtu > 2K ==> connected mode */ |
586a6934 PS |
189 | if (ipoib_cm_admin_enabled(dev)) { |
190 | if (new_mtu > ipoib_cm_max_mtu(dev)) | |
191 | return -EINVAL; | |
192 | ||
839fcaba MT |
193 | if (new_mtu > priv->mcast_mtu) |
194 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
195 | priv->mcast_mtu); | |
586a6934 | 196 | |
839fcaba MT |
197 | dev->mtu = new_mtu; |
198 | return 0; | |
199 | } | |
200 | ||
bc7b3a36 | 201 | if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) |
1da177e4 LT |
202 | return -EINVAL; |
203 | ||
204 | priv->admin_mtu = new_mtu; | |
205 | ||
206 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
37c22a77 | 211 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
212 | { |
213 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
214 | struct rb_node *n = priv->path_tree.rb_node; | |
215 | struct ipoib_path *path; | |
216 | int ret; | |
217 | ||
218 | while (n) { | |
219 | path = rb_entry(n, struct ipoib_path, rb_node); | |
220 | ||
37c22a77 | 221 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
222 | sizeof (union ib_gid)); |
223 | ||
224 | if (ret < 0) | |
225 | n = n->rb_left; | |
226 | else if (ret > 0) | |
227 | n = n->rb_right; | |
228 | else | |
229 | return path; | |
230 | } | |
231 | ||
232 | return NULL; | |
233 | } | |
234 | ||
235 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
236 | { | |
237 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
238 | struct rb_node **n = &priv->path_tree.rb_node; | |
239 | struct rb_node *pn = NULL; | |
240 | struct ipoib_path *tpath; | |
241 | int ret; | |
242 | ||
243 | while (*n) { | |
244 | pn = *n; | |
245 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
246 | ||
247 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
248 | sizeof (union ib_gid)); | |
249 | if (ret < 0) | |
250 | n = &pn->rb_left; | |
251 | else if (ret > 0) | |
252 | n = &pn->rb_right; | |
253 | else | |
254 | return -EEXIST; | |
255 | } | |
256 | ||
257 | rb_link_node(&path->rb_node, pn, n); | |
258 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
259 | ||
260 | list_add_tail(&path->list, &priv->path_list); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
266 | { | |
267 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
268 | struct ipoib_neigh *neigh, *tn; | |
269 | struct sk_buff *skb; | |
270 | unsigned long flags; | |
271 | ||
272 | while ((skb = __skb_dequeue(&path->queue))) | |
273 | dev_kfree_skb_irq(skb); | |
274 | ||
275 | spin_lock_irqsave(&priv->lock, flags); | |
276 | ||
277 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
278 | /* | |
279 | * It's safe to call ipoib_put_ah() inside priv->lock | |
280 | * here, because we know that path->ah will always | |
281 | * hold one more reference, so ipoib_put_ah() will | |
282 | * never do more than decrement the ref count. | |
283 | */ | |
284 | if (neigh->ah) | |
285 | ipoib_put_ah(neigh->ah); | |
d2e0655e | 286 | |
2745b5b7 | 287 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
288 | } |
289 | ||
290 | spin_unlock_irqrestore(&priv->lock, flags); | |
291 | ||
292 | if (path->ah) | |
293 | ipoib_put_ah(path->ah); | |
294 | ||
295 | kfree(path); | |
296 | } | |
297 | ||
1732b0ef RD |
298 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
299 | ||
300 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
301 | { | |
302 | struct ipoib_path_iter *iter; | |
303 | ||
304 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
305 | if (!iter) | |
306 | return NULL; | |
307 | ||
308 | iter->dev = dev; | |
309 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
310 | ||
311 | if (ipoib_path_iter_next(iter)) { | |
312 | kfree(iter); | |
313 | return NULL; | |
314 | } | |
315 | ||
316 | return iter; | |
317 | } | |
318 | ||
319 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
320 | { | |
321 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
322 | struct rb_node *n; | |
323 | struct ipoib_path *path; | |
324 | int ret = 1; | |
325 | ||
326 | spin_lock_irq(&priv->lock); | |
327 | ||
328 | n = rb_first(&priv->path_tree); | |
329 | ||
330 | while (n) { | |
331 | path = rb_entry(n, struct ipoib_path, rb_node); | |
332 | ||
333 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
334 | sizeof (union ib_gid)) < 0) { | |
335 | iter->path = *path; | |
336 | ret = 0; | |
337 | break; | |
338 | } | |
339 | ||
340 | n = rb_next(n); | |
341 | } | |
342 | ||
343 | spin_unlock_irq(&priv->lock); | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
348 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
349 | struct ipoib_path *path) | |
350 | { | |
351 | *path = iter->path; | |
352 | } | |
353 | ||
354 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
355 | ||
ee1e2c82 MS |
356 | void ipoib_mark_paths_invalid(struct net_device *dev) |
357 | { | |
358 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
359 | struct ipoib_path *path, *tp; | |
360 | ||
361 | spin_lock_irq(&priv->lock); | |
362 | ||
363 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
5b095d98 | 364 | ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", |
ee1e2c82 | 365 | be16_to_cpu(path->pathrec.dlid), |
fcace2fe | 366 | path->pathrec.dgid.raw); |
ee1e2c82 MS |
367 | path->valid = 0; |
368 | } | |
369 | ||
370 | spin_unlock_irq(&priv->lock); | |
371 | } | |
372 | ||
1da177e4 LT |
373 | void ipoib_flush_paths(struct net_device *dev) |
374 | { | |
375 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
376 | struct ipoib_path *path, *tp; | |
377 | LIST_HEAD(remove_list); | |
943c246e | 378 | unsigned long flags; |
1da177e4 | 379 | |
943c246e RD |
380 | netif_tx_lock_bh(dev); |
381 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 382 | |
157de229 | 383 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
384 | |
385 | list_for_each_entry(path, &remove_list, list) | |
386 | rb_erase(&path->rb_node, &priv->path_tree); | |
387 | ||
1da177e4 LT |
388 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
389 | if (path->query) | |
390 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
391 | spin_unlock_irqrestore(&priv->lock, flags); |
392 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
393 | wait_for_completion(&path->done); |
394 | path_free(dev, path); | |
943c246e RD |
395 | netif_tx_lock_bh(dev); |
396 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 397 | } |
943c246e RD |
398 | |
399 | spin_unlock_irqrestore(&priv->lock, flags); | |
400 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
401 | } |
402 | ||
403 | static void path_rec_completion(int status, | |
404 | struct ib_sa_path_rec *pathrec, | |
405 | void *path_ptr) | |
406 | { | |
407 | struct ipoib_path *path = path_ptr; | |
408 | struct net_device *dev = path->dev; | |
409 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
410 | struct ipoib_ah *ah = NULL; | |
c9da4bad | 411 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 412 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
413 | struct sk_buff_head skqueue; |
414 | struct sk_buff *skb; | |
415 | unsigned long flags; | |
416 | ||
843613b0 | 417 | if (!status) |
5b095d98 | 418 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
fcace2fe | 419 | be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); |
1da177e4 | 420 | else |
5b095d98 | 421 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 422 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
423 | |
424 | skb_queue_head_init(&skqueue); | |
425 | ||
426 | if (!status) { | |
46f1b3d7 SH |
427 | struct ib_ah_attr av; |
428 | ||
429 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
430 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
431 | } |
432 | ||
433 | spin_lock_irqsave(&priv->lock, flags); | |
434 | ||
1da177e4 LT |
435 | if (ah) { |
436 | path->pathrec = *pathrec; | |
437 | ||
c9da4bad RD |
438 | old_ah = path->ah; |
439 | path->ah = ah; | |
440 | ||
1da177e4 LT |
441 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
442 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
443 | ||
444 | while ((skb = __skb_dequeue(&path->queue))) | |
445 | __skb_queue_tail(&skqueue, skb); | |
446 | ||
d04d01b1 | 447 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
448 | if (neigh->ah) { |
449 | WARN_ON(neigh->ah != old_ah); | |
450 | /* | |
451 | * Dropping the ah reference inside | |
452 | * priv->lock is safe here, because we | |
453 | * will hold one more reference from | |
454 | * the original value of path->ah (ie | |
455 | * old_ah). | |
456 | */ | |
457 | ipoib_put_ah(neigh->ah); | |
458 | } | |
1da177e4 LT |
459 | kref_get(&path->ah->ref); |
460 | neigh->ah = path->ah; | |
8a7f7521 MT |
461 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
462 | sizeof(union ib_gid)); | |
1da177e4 | 463 | |
839fcaba MT |
464 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
465 | if (!ipoib_cm_get(neigh)) | |
466 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
467 | path, | |
468 | neigh)); | |
469 | if (!ipoib_cm_get(neigh)) { | |
470 | list_del(&neigh->list); | |
471 | if (neigh->ah) | |
472 | ipoib_put_ah(neigh->ah); | |
473 | ipoib_neigh_free(dev, neigh); | |
474 | continue; | |
475 | } | |
476 | } | |
477 | ||
1da177e4 LT |
478 | while ((skb = __skb_dequeue(&neigh->queue))) |
479 | __skb_queue_tail(&skqueue, skb); | |
480 | } | |
ee1e2c82 | 481 | path->valid = 1; |
5872a9fc | 482 | } |
1da177e4 | 483 | |
5872a9fc | 484 | path->query = NULL; |
1da177e4 LT |
485 | complete(&path->done); |
486 | ||
487 | spin_unlock_irqrestore(&priv->lock, flags); | |
488 | ||
ee1e2c82 MS |
489 | if (old_ah) |
490 | ipoib_put_ah(old_ah); | |
491 | ||
1da177e4 LT |
492 | while ((skb = __skb_dequeue(&skqueue))) { |
493 | skb->dev = dev; | |
494 | if (dev_queue_xmit(skb)) | |
495 | ipoib_warn(priv, "dev_queue_xmit failed " | |
496 | "to requeue packet\n"); | |
497 | } | |
498 | } | |
499 | ||
37c22a77 | 500 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
501 | { |
502 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
503 | struct ipoib_path *path; | |
504 | ||
1401b53a JM |
505 | if (!priv->broadcast) |
506 | return NULL; | |
507 | ||
21a38489 | 508 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
509 | if (!path) |
510 | return NULL; | |
511 | ||
21a38489 | 512 | path->dev = dev; |
1da177e4 LT |
513 | |
514 | skb_queue_head_init(&path->queue); | |
515 | ||
516 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 517 | |
37c22a77 | 518 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
2337f809 RD |
519 | path->pathrec.sgid = priv->local_gid; |
520 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
81668838 SH |
521 | path->pathrec.numb_path = 1; |
522 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
523 | |
524 | return path; | |
525 | } | |
526 | ||
527 | static int path_rec_start(struct net_device *dev, | |
528 | struct ipoib_path *path) | |
529 | { | |
530 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
531 | ||
5b095d98 | 532 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 533 | path->pathrec.dgid.raw); |
1da177e4 | 534 | |
65c7edda RD |
535 | init_completion(&path->done); |
536 | ||
1da177e4 | 537 | path->query_id = |
c1a0b23b | 538 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
539 | &path->pathrec, |
540 | IB_SA_PATH_REC_DGID | | |
541 | IB_SA_PATH_REC_SGID | | |
542 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 543 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
544 | IB_SA_PATH_REC_PKEY, |
545 | 1000, GFP_ATOMIC, | |
546 | path_rec_completion, | |
547 | path, &path->query); | |
548 | if (path->query_id < 0) { | |
01b3fc8b | 549 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 550 | path->query = NULL; |
93a3ab93 | 551 | complete(&path->done); |
1da177e4 LT |
552 | return path->query_id; |
553 | } | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
559 | { | |
560 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
561 | struct ipoib_path *path; | |
562 | struct ipoib_neigh *neigh; | |
69cce1d1 | 563 | struct neighbour *n; |
943c246e | 564 | unsigned long flags; |
1da177e4 | 565 | |
69cce1d1 DM |
566 | n = dst_get_neighbour(skb_dst(skb)); |
567 | neigh = ipoib_neigh_alloc(n, skb->dev); | |
1da177e4 | 568 | if (!neigh) { |
de903512 | 569 | ++dev->stats.tx_dropped; |
1da177e4 LT |
570 | dev_kfree_skb_any(skb); |
571 | return; | |
572 | } | |
573 | ||
943c246e | 574 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 575 | |
69cce1d1 | 576 | path = __path_find(dev, n->ha + 4); |
1da177e4 | 577 | if (!path) { |
69cce1d1 | 578 | path = path_rec_create(dev, n->ha + 4); |
1da177e4 | 579 | if (!path) |
d2e0655e | 580 | goto err_path; |
1da177e4 LT |
581 | |
582 | __path_add(dev, path); | |
583 | } | |
584 | ||
585 | list_add_tail(&neigh->list, &path->neigh_list); | |
586 | ||
47f7a071 | 587 | if (path->ah) { |
1da177e4 LT |
588 | kref_get(&path->ah->ref); |
589 | neigh->ah = path->ah; | |
8a7f7521 MT |
590 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
591 | sizeof(union ib_gid)); | |
1da177e4 | 592 | |
839fcaba MT |
593 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
594 | if (!ipoib_cm_get(neigh)) | |
595 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
596 | if (!ipoib_cm_get(neigh)) { | |
597 | list_del(&neigh->list); | |
598 | if (neigh->ah) | |
599 | ipoib_put_ah(neigh->ah); | |
600 | ipoib_neigh_free(dev, neigh); | |
601 | goto err_drop; | |
602 | } | |
603 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
604 | __skb_queue_tail(&neigh->queue, skb); | |
605 | else { | |
606 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
607 | skb_queue_len(&neigh->queue)); | |
608 | goto err_drop; | |
609 | } | |
721d67cd RD |
610 | } else { |
611 | spin_unlock_irqrestore(&priv->lock, flags); | |
69cce1d1 | 612 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(n->ha)); |
721d67cd RD |
613 | return; |
614 | } | |
1da177e4 LT |
615 | } else { |
616 | neigh->ah = NULL; | |
1da177e4 LT |
617 | |
618 | if (!path->query && path_rec_start(dev, path)) | |
d2e0655e | 619 | goto err_list; |
2745b5b7 MT |
620 | |
621 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
622 | } |
623 | ||
943c246e | 624 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
625 | return; |
626 | ||
d2e0655e | 627 | err_list: |
1da177e4 | 628 | list_del(&neigh->list); |
1da177e4 | 629 | |
d2e0655e | 630 | err_path: |
2745b5b7 | 631 | ipoib_neigh_free(dev, neigh); |
839fcaba | 632 | err_drop: |
de903512 | 633 | ++dev->stats.tx_dropped; |
1da177e4 LT |
634 | dev_kfree_skb_any(skb); |
635 | ||
943c246e | 636 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
637 | } |
638 | ||
d70ed607 | 639 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
640 | { |
641 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
69cce1d1 DM |
642 | struct dst_entry *dst = skb_dst(skb); |
643 | struct neighbour *n; | |
1da177e4 LT |
644 | |
645 | /* Look up path record for unicasts */ | |
69cce1d1 DM |
646 | n = dst_get_neighbour(dst); |
647 | if (n->ha[4] != 0xff) { | |
1da177e4 LT |
648 | neigh_add_path(skb, dev); |
649 | return; | |
650 | } | |
651 | ||
652 | /* Add in the P_Key for multicasts */ | |
69cce1d1 DM |
653 | n->ha[8] = (priv->pkey >> 8) & 0xff; |
654 | n->ha[9] = priv->pkey & 0xff; | |
655 | ipoib_mcast_send(dev, n->ha + 4, skb); | |
1da177e4 LT |
656 | } |
657 | ||
658 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
659 | struct ipoib_pseudoheader *phdr) | |
660 | { | |
661 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
662 | struct ipoib_path *path; | |
943c246e | 663 | unsigned long flags; |
1da177e4 | 664 | |
943c246e | 665 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 666 | |
37c22a77 | 667 | path = __path_find(dev, phdr->hwaddr + 4); |
ee1e2c82 | 668 | if (!path || !path->valid) { |
71d98b46 JM |
669 | int new_path = 0; |
670 | ||
671 | if (!path) { | |
ee1e2c82 | 672 | path = path_rec_create(dev, phdr->hwaddr + 4); |
71d98b46 JM |
673 | new_path = 1; |
674 | } | |
1da177e4 LT |
675 | if (path) { |
676 | /* put pseudoheader back on for next time */ | |
677 | skb_push(skb, sizeof *phdr); | |
678 | __skb_queue_tail(&path->queue, skb); | |
679 | ||
ff79ae80 | 680 | if (!path->query && path_rec_start(dev, path)) { |
943c246e | 681 | spin_unlock_irqrestore(&priv->lock, flags); |
71d98b46 JM |
682 | if (new_path) |
683 | path_free(dev, path); | |
1da177e4 LT |
684 | return; |
685 | } else | |
686 | __path_add(dev, path); | |
687 | } else { | |
de903512 | 688 | ++dev->stats.tx_dropped; |
1da177e4 LT |
689 | dev_kfree_skb_any(skb); |
690 | } | |
691 | ||
943c246e | 692 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
693 | return; |
694 | } | |
695 | ||
47f7a071 | 696 | if (path->ah) { |
1da177e4 LT |
697 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
698 | be16_to_cpu(path->pathrec.dlid)); | |
699 | ||
721d67cd | 700 | spin_unlock_irqrestore(&priv->lock, flags); |
073ae841 | 701 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); |
721d67cd | 702 | return; |
1da177e4 LT |
703 | } else if ((path->query || !path_rec_start(dev, path)) && |
704 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
705 | /* put pseudoheader back on for next time */ | |
706 | skb_push(skb, sizeof *phdr); | |
707 | __skb_queue_tail(&path->queue, skb); | |
708 | } else { | |
de903512 | 709 | ++dev->stats.tx_dropped; |
1da177e4 LT |
710 | dev_kfree_skb_any(skb); |
711 | } | |
712 | ||
943c246e | 713 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
714 | } |
715 | ||
716 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
717 | { | |
718 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
719 | struct ipoib_neigh *neigh; | |
22cfb0bf | 720 | struct neighbour *n = NULL; |
1da177e4 LT |
721 | unsigned long flags; |
722 | ||
22cfb0bf BS |
723 | if (likely(skb_dst(skb))) |
724 | n = dst_get_neighbour(skb_dst(skb)); | |
725 | ||
726 | if (likely(n)) { | |
69cce1d1 | 727 | if (unlikely(!*to_ipoib_neigh(n))) { |
d70ed607 | 728 | ipoib_path_lookup(skb, dev); |
943c246e | 729 | return NETDEV_TX_OK; |
1da177e4 LT |
730 | } |
731 | ||
69cce1d1 | 732 | neigh = *to_ipoib_neigh(n); |
1da177e4 | 733 | |
a50df398 | 734 | if (unlikely((memcmp(&neigh->dgid.raw, |
69cce1d1 | 735 | n->ha + 4, |
a50df398 YE |
736 | sizeof(union ib_gid))) || |
737 | (neigh->dev != dev))) { | |
738 | spin_lock_irqsave(&priv->lock, flags); | |
739 | /* | |
740 | * It's safe to call ipoib_put_ah() inside | |
741 | * priv->lock here, because we know that | |
742 | * path->ah will always hold one more reference, | |
743 | * so ipoib_put_ah() will never do more than | |
744 | * decrement the ref count. | |
745 | */ | |
746 | if (neigh->ah) | |
8a7f7521 | 747 | ipoib_put_ah(neigh->ah); |
a50df398 YE |
748 | list_del(&neigh->list); |
749 | ipoib_neigh_free(dev, neigh); | |
750 | spin_unlock_irqrestore(&priv->lock, flags); | |
751 | ipoib_path_lookup(skb, dev); | |
752 | return NETDEV_TX_OK; | |
753 | } | |
8a7f7521 | 754 | |
bafff974 OG |
755 | if (ipoib_cm_get(neigh)) { |
756 | if (ipoib_cm_up(neigh)) { | |
757 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
943c246e | 758 | return NETDEV_TX_OK; |
bafff974 OG |
759 | } |
760 | } else if (neigh->ah) { | |
69cce1d1 | 761 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(n->ha)); |
943c246e | 762 | return NETDEV_TX_OK; |
1da177e4 LT |
763 | } |
764 | ||
765 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
943c246e | 766 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 767 | __skb_queue_tail(&neigh->queue, skb); |
943c246e | 768 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 769 | } else { |
de903512 | 770 | ++dev->stats.tx_dropped; |
1da177e4 LT |
771 | dev_kfree_skb_any(skb); |
772 | } | |
773 | } else { | |
774 | struct ipoib_pseudoheader *phdr = | |
775 | (struct ipoib_pseudoheader *) skb->data; | |
776 | skb_pull(skb, sizeof *phdr); | |
777 | ||
778 | if (phdr->hwaddr[4] == 0xff) { | |
779 | /* Add in the P_Key for multicast*/ | |
780 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
781 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
782 | ||
37c22a77 | 783 | ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); |
1da177e4 | 784 | } else { |
0dca0f7b | 785 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 786 | |
0dca0f7b HR |
787 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
788 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
5b095d98 | 789 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x %pI6\n", |
adf30907 | 790 | skb_dst(skb) ? "neigh" : "dst", |
97f52eb4 | 791 | be16_to_cpup((__be16 *) skb->data), |
073ae841 | 792 | IPOIB_QPN(phdr->hwaddr), |
fcace2fe | 793 | phdr->hwaddr + 4); |
1da177e4 | 794 | dev_kfree_skb_any(skb); |
de903512 | 795 | ++dev->stats.tx_dropped; |
943c246e | 796 | return NETDEV_TX_OK; |
1da177e4 LT |
797 | } |
798 | ||
799 | unicast_arp_send(skb, dev, phdr); | |
800 | } | |
801 | } | |
802 | ||
1da177e4 LT |
803 | return NETDEV_TX_OK; |
804 | } | |
805 | ||
1da177e4 LT |
806 | static void ipoib_timeout(struct net_device *dev) |
807 | { | |
808 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
809 | ||
4b2d319b RD |
810 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
811 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
812 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
813 | netif_queue_stopped(dev), | |
814 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
815 | /* XXX reset QP, etc. */ |
816 | } | |
817 | ||
818 | static int ipoib_hard_header(struct sk_buff *skb, | |
819 | struct net_device *dev, | |
820 | unsigned short type, | |
3b04ddde | 821 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
822 | { |
823 | struct ipoib_header *header; | |
69cce1d1 DM |
824 | struct dst_entry *dst; |
825 | struct neighbour *n; | |
1da177e4 LT |
826 | |
827 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
828 | ||
829 | header->proto = htons(type); | |
830 | header->reserved = 0; | |
831 | ||
832 | /* | |
833 | * If we don't have a neighbour structure, stuff the | |
834 | * destination address onto the front of the skb so we can | |
835 | * figure out where to send the packet later. | |
836 | */ | |
69cce1d1 DM |
837 | dst = skb_dst(skb); |
838 | n = NULL; | |
839 | if (dst) | |
840 | n = dst_get_neighbour(dst); | |
841 | if ((!dst || !n) && daddr) { | |
1da177e4 LT |
842 | struct ipoib_pseudoheader *phdr = |
843 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
844 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
845 | } | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
850 | static void ipoib_set_mcast_list(struct net_device *dev) | |
851 | { | |
852 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
853 | ||
7a343d4c LA |
854 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
855 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
856 | return; | |
857 | } | |
858 | ||
1ad62a19 | 859 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
860 | } |
861 | ||
ecbb4169 | 862 | static void ipoib_neigh_cleanup(struct neighbour *n) |
1da177e4 LT |
863 | { |
864 | struct ipoib_neigh *neigh; | |
865 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
866 | unsigned long flags; | |
867 | struct ipoib_ah *ah = NULL; | |
868 | ||
732a2170 | 869 | neigh = *to_ipoib_neigh(n); |
7bc531dd | 870 | if (neigh) |
732a2170 | 871 | priv = netdev_priv(neigh->dev); |
7bc531dd | 872 | else |
732a2170 | 873 | return; |
1da177e4 | 874 | ipoib_dbg(priv, |
5b095d98 | 875 | "neigh_cleanup for %06x %pI6\n", |
073ae841 | 876 | IPOIB_QPN(n->ha), |
fcace2fe | 877 | n->ha + 4); |
1da177e4 LT |
878 | |
879 | spin_lock_irqsave(&priv->lock, flags); | |
880 | ||
732a2170 MS |
881 | if (neigh->ah) |
882 | ah = neigh->ah; | |
883 | list_del(&neigh->list); | |
884 | ipoib_neigh_free(n->dev, neigh); | |
1da177e4 LT |
885 | |
886 | spin_unlock_irqrestore(&priv->lock, flags); | |
887 | ||
888 | if (ah) | |
889 | ipoib_put_ah(ah); | |
890 | } | |
891 | ||
732a2170 MS |
892 | struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour, |
893 | struct net_device *dev) | |
d2e0655e MT |
894 | { |
895 | struct ipoib_neigh *neigh; | |
896 | ||
897 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
898 | if (!neigh) | |
899 | return NULL; | |
900 | ||
901 | neigh->neighbour = neighbour; | |
732a2170 | 902 | neigh->dev = dev; |
0cd4d0fd | 903 | memset(&neigh->dgid.raw, 0, sizeof (union ib_gid)); |
d2e0655e | 904 | *to_ipoib_neigh(neighbour) = neigh; |
82b39913 | 905 | skb_queue_head_init(&neigh->queue); |
839fcaba | 906 | ipoib_cm_set(neigh, NULL); |
d2e0655e MT |
907 | |
908 | return neigh; | |
909 | } | |
910 | ||
2745b5b7 | 911 | void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh) |
d2e0655e | 912 | { |
2745b5b7 | 913 | struct sk_buff *skb; |
d2e0655e | 914 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
2745b5b7 | 915 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 916 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
917 | dev_kfree_skb_any(skb); |
918 | } | |
839fcaba MT |
919 | if (ipoib_cm_get(neigh)) |
920 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
d2e0655e MT |
921 | kfree(neigh); |
922 | } | |
923 | ||
1da177e4 LT |
924 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
925 | { | |
ecbb4169 | 926 | parms->neigh_cleanup = ipoib_neigh_cleanup; |
1da177e4 LT |
927 | |
928 | return 0; | |
929 | } | |
930 | ||
931 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
932 | { | |
933 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
934 | ||
935 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 936 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
937 | GFP_KERNEL); |
938 | if (!priv->rx_ring) { | |
939 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 940 | ca->name, ipoib_recvq_size); |
1da177e4 LT |
941 | goto out; |
942 | } | |
1da177e4 | 943 | |
948579cd | 944 | priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 LT |
945 | if (!priv->tx_ring) { |
946 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 947 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
948 | goto out_rx_ring_cleanup; |
949 | } | |
1da177e4 | 950 | |
1b524963 | 951 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
952 | |
953 | if (ipoib_ib_dev_init(dev, ca, port)) | |
954 | goto out_tx_ring_cleanup; | |
955 | ||
956 | return 0; | |
957 | ||
958 | out_tx_ring_cleanup: | |
10313cbb | 959 | vfree(priv->tx_ring); |
1da177e4 LT |
960 | |
961 | out_rx_ring_cleanup: | |
962 | kfree(priv->rx_ring); | |
963 | ||
964 | out: | |
965 | return -ENOMEM; | |
966 | } | |
967 | ||
968 | void ipoib_dev_cleanup(struct net_device *dev) | |
969 | { | |
970 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
971 | ||
1732b0ef | 972 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
973 | |
974 | /* Delete any child interfaces first */ | |
975 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
976 | unregister_netdev(cpriv->dev); | |
977 | ipoib_dev_cleanup(cpriv->dev); | |
978 | free_netdev(cpriv->dev); | |
979 | } | |
980 | ||
981 | ipoib_ib_dev_cleanup(dev); | |
982 | ||
92a6b34b | 983 | kfree(priv->rx_ring); |
10313cbb | 984 | vfree(priv->tx_ring); |
1da177e4 | 985 | |
92a6b34b HR |
986 | priv->rx_ring = NULL; |
987 | priv->tx_ring = NULL; | |
1da177e4 LT |
988 | } |
989 | ||
3b04ddde SH |
990 | static const struct header_ops ipoib_header_ops = { |
991 | .create = ipoib_hard_header, | |
992 | }; | |
993 | ||
fe8114e8 SH |
994 | static const struct net_device_ops ipoib_netdev_ops = { |
995 | .ndo_open = ipoib_open, | |
996 | .ndo_stop = ipoib_stop, | |
997 | .ndo_change_mtu = ipoib_change_mtu, | |
3d96c74d | 998 | .ndo_fix_features = ipoib_fix_features, |
fe8114e8 SH |
999 | .ndo_start_xmit = ipoib_start_xmit, |
1000 | .ndo_tx_timeout = ipoib_timeout, | |
afc4b13d | 1001 | .ndo_set_rx_mode = ipoib_set_mcast_list, |
fe8114e8 SH |
1002 | .ndo_neigh_setup = ipoib_neigh_setup_dev, |
1003 | }; | |
1004 | ||
1da177e4 LT |
1005 | static void ipoib_setup(struct net_device *dev) |
1006 | { | |
1007 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1008 | ||
fe8114e8 | 1009 | dev->netdev_ops = &ipoib_netdev_ops; |
2337f809 | 1010 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 1011 | |
82c24c18 EC |
1012 | ipoib_set_ethtool_ops(dev); |
1013 | ||
bea3348e | 1014 | netif_napi_add(dev, &priv->napi, ipoib_poll, 100); |
1da177e4 | 1015 | |
2337f809 | 1016 | dev->watchdog_timeo = HZ; |
1da177e4 | 1017 | |
2337f809 | 1018 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 LT |
1019 | |
1020 | /* | |
1021 | * We add in INFINIBAND_ALEN to allow for the destination | |
1022 | * address "pseudoheader" for skbs without neighbour struct. | |
1023 | */ | |
2337f809 RD |
1024 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; |
1025 | dev->addr_len = INFINIBAND_ALEN; | |
1026 | dev->type = ARPHRD_INFINIBAND; | |
1027 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 1028 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 1029 | NETIF_F_HIGHDMA); |
86d15cd8 | 1030 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 | 1031 | |
1da177e4 LT |
1032 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
1033 | ||
1034 | netif_carrier_off(dev); | |
1035 | ||
1da177e4 LT |
1036 | priv->dev = dev; |
1037 | ||
1038 | spin_lock_init(&priv->lock); | |
1da177e4 | 1039 | |
95ed644f | 1040 | mutex_init(&priv->vlan_mutex); |
1da177e4 LT |
1041 | |
1042 | INIT_LIST_HEAD(&priv->path_list); | |
1043 | INIT_LIST_HEAD(&priv->child_intfs); | |
1044 | INIT_LIST_HEAD(&priv->dead_ahs); | |
1045 | INIT_LIST_HEAD(&priv->multicast_list); | |
1046 | ||
26bbf13c | 1047 | INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); |
c4028958 | 1048 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 1049 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
1050 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
1051 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
1052 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
1053 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
1054 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1058 | { | |
1059 | struct net_device *dev; | |
1060 | ||
1061 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
1062 | ipoib_setup); | |
1063 | if (!dev) | |
1064 | return NULL; | |
1065 | ||
1066 | return netdev_priv(dev); | |
1067 | } | |
1068 | ||
43cb76d9 GKH |
1069 | static ssize_t show_pkey(struct device *dev, |
1070 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1071 | { |
43cb76d9 | 1072 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1073 | |
1074 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1075 | } | |
43cb76d9 | 1076 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1077 | |
335a64a5 OG |
1078 | static ssize_t show_umcast(struct device *dev, |
1079 | struct device_attribute *attr, char *buf) | |
1080 | { | |
1081 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1082 | ||
1083 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1084 | } | |
1085 | ||
1086 | static ssize_t set_umcast(struct device *dev, | |
1087 | struct device_attribute *attr, | |
1088 | const char *buf, size_t count) | |
1089 | { | |
1090 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1091 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1092 | ||
1093 | if (umcast_val > 0) { | |
1094 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1095 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1096 | "by userspace\n"); | |
1097 | } else | |
1098 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1099 | ||
1100 | return count; | |
1101 | } | |
1102 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1103 | ||
1104 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1105 | { | |
1106 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1107 | } | |
1108 | ||
43cb76d9 GKH |
1109 | static ssize_t create_child(struct device *dev, |
1110 | struct device_attribute *attr, | |
1da177e4 LT |
1111 | const char *buf, size_t count) |
1112 | { | |
1113 | int pkey; | |
1114 | int ret; | |
1115 | ||
1116 | if (sscanf(buf, "%i", &pkey) != 1) | |
1117 | return -EINVAL; | |
1118 | ||
1119 | if (pkey < 0 || pkey > 0xffff) | |
1120 | return -EINVAL; | |
1121 | ||
4ce05937 RD |
1122 | /* |
1123 | * Set the full membership bit, so that we join the right | |
1124 | * broadcast group, etc. | |
1125 | */ | |
1126 | pkey |= 0x8000; | |
1127 | ||
43cb76d9 | 1128 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1129 | |
1130 | return ret ? ret : count; | |
1131 | } | |
7a52b34b | 1132 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 1133 | |
43cb76d9 GKH |
1134 | static ssize_t delete_child(struct device *dev, |
1135 | struct device_attribute *attr, | |
1da177e4 LT |
1136 | const char *buf, size_t count) |
1137 | { | |
1138 | int pkey; | |
1139 | int ret; | |
1140 | ||
1141 | if (sscanf(buf, "%i", &pkey) != 1) | |
1142 | return -EINVAL; | |
1143 | ||
1144 | if (pkey < 0 || pkey > 0xffff) | |
1145 | return -EINVAL; | |
1146 | ||
43cb76d9 | 1147 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1148 | |
1149 | return ret ? ret : count; | |
1150 | ||
1151 | } | |
7a52b34b | 1152 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
1153 | |
1154 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1155 | { | |
43cb76d9 | 1156 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1157 | } |
1158 | ||
83bb63f6 OG |
1159 | int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) |
1160 | { | |
1161 | struct ib_device_attr *device_attr; | |
1162 | int result = -ENOMEM; | |
1163 | ||
1164 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
1165 | if (!device_attr) { | |
1166 | printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", | |
1167 | hca->name, sizeof *device_attr); | |
1168 | return result; | |
1169 | } | |
1170 | ||
1171 | result = ib_query_device(hca, device_attr); | |
1172 | if (result) { | |
1173 | printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", | |
1174 | hca->name, result); | |
1175 | kfree(device_attr); | |
1176 | return result; | |
1177 | } | |
1178 | priv->hca_caps = device_attr->device_cap_flags; | |
1179 | ||
1180 | kfree(device_attr); | |
1181 | ||
1182 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
3d96c74d MM |
1183 | priv->dev->hw_features = NETIF_F_SG | |
1184 | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; | |
83bb63f6 | 1185 | |
3d96c74d MM |
1186 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
1187 | priv->dev->hw_features |= NETIF_F_TSO; | |
8ae31e5b | 1188 | |
3d96c74d MM |
1189 | priv->dev->features |= priv->dev->hw_features; |
1190 | } | |
83bb63f6 OG |
1191 | |
1192 | return 0; | |
1193 | } | |
1194 | ||
1da177e4 LT |
1195 | static struct net_device *ipoib_add_port(const char *format, |
1196 | struct ib_device *hca, u8 port) | |
1197 | { | |
1198 | struct ipoib_dev_priv *priv; | |
bc7b3a36 | 1199 | struct ib_port_attr attr; |
1da177e4 LT |
1200 | int result = -ENOMEM; |
1201 | ||
1202 | priv = ipoib_intf_alloc(format); | |
1203 | if (!priv) | |
1204 | goto alloc_mem_failed; | |
1205 | ||
1206 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
c3aa9b18 | 1207 | priv->dev->dev_id = port - 1; |
1da177e4 | 1208 | |
bc7b3a36 SM |
1209 | if (!ib_query_port(hca, port, &attr)) |
1210 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); | |
1211 | else { | |
1212 | printk(KERN_WARNING "%s: ib_query_port %d failed\n", | |
1213 | hca->name, port); | |
1214 | goto device_init_failed; | |
1215 | } | |
1216 | ||
1217 | /* MTU will be reset when mcast join happens */ | |
1218 | priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1219 | priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; | |
1220 | ||
1da177e4 LT |
1221 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
1222 | if (result) { | |
1223 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1224 | hca->name, port, result); | |
ca6de177 | 1225 | goto device_init_failed; |
1da177e4 LT |
1226 | } |
1227 | ||
83bb63f6 | 1228 | if (ipoib_set_dev_features(priv, hca)) |
6046136c | 1229 | goto device_init_failed; |
af40da89 | 1230 | |
4ce05937 RD |
1231 | /* |
1232 | * Set the full membership bit, so that we join the right | |
1233 | * broadcast group, etc. | |
1234 | */ | |
1235 | priv->pkey |= 0x8000; | |
1236 | ||
1da177e4 LT |
1237 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1238 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1239 | ||
1240 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1241 | if (result) { | |
1242 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1243 | hca->name, port, result); | |
ca6de177 | 1244 | goto device_init_failed; |
1da177e4 LT |
1245 | } else |
1246 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1247 | ||
1da177e4 LT |
1248 | result = ipoib_dev_init(priv->dev, hca, port); |
1249 | if (result < 0) { | |
1250 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1251 | hca->name, port, result); | |
1252 | goto device_init_failed; | |
1253 | } | |
1254 | ||
1255 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1256 | priv->ca, ipoib_event); | |
1257 | result = ib_register_event_handler(&priv->event_handler); | |
1258 | if (result < 0) { | |
1259 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1260 | "port %d (ret = %d)\n", | |
1261 | hca->name, port, result); | |
1262 | goto event_failed; | |
1263 | } | |
1264 | ||
1265 | result = register_netdev(priv->dev); | |
1266 | if (result) { | |
1267 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1268 | hca->name, port, result); | |
1269 | goto register_failed; | |
1270 | } | |
1271 | ||
1732b0ef | 1272 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1273 | |
839fcaba MT |
1274 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1275 | goto sysfs_failed; | |
1da177e4 LT |
1276 | if (ipoib_add_pkey_attr(priv->dev)) |
1277 | goto sysfs_failed; | |
335a64a5 OG |
1278 | if (ipoib_add_umcast_attr(priv->dev)) |
1279 | goto sysfs_failed; | |
43cb76d9 | 1280 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1281 | goto sysfs_failed; |
43cb76d9 | 1282 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1283 | goto sysfs_failed; |
1284 | ||
1285 | return priv->dev; | |
1286 | ||
1287 | sysfs_failed: | |
1732b0ef | 1288 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1289 | unregister_netdev(priv->dev); |
1290 | ||
1291 | register_failed: | |
1292 | ib_unregister_event_handler(&priv->event_handler); | |
a77a57a1 | 1293 | flush_workqueue(ipoib_workqueue); |
1da177e4 LT |
1294 | |
1295 | event_failed: | |
1296 | ipoib_dev_cleanup(priv->dev); | |
1297 | ||
1298 | device_init_failed: | |
1299 | free_netdev(priv->dev); | |
1300 | ||
1301 | alloc_mem_failed: | |
1302 | return ERR_PTR(result); | |
1303 | } | |
1304 | ||
1305 | static void ipoib_add_one(struct ib_device *device) | |
1306 | { | |
1307 | struct list_head *dev_list; | |
1308 | struct net_device *dev; | |
1309 | struct ipoib_dev_priv *priv; | |
1310 | int s, e, p; | |
1311 | ||
07ebafba TT |
1312 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1313 | return; | |
1314 | ||
1da177e4 LT |
1315 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1316 | if (!dev_list) | |
1317 | return; | |
1318 | ||
1319 | INIT_LIST_HEAD(dev_list); | |
1320 | ||
07ebafba | 1321 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1322 | s = 0; |
1323 | e = 0; | |
1324 | } else { | |
1325 | s = 1; | |
1326 | e = device->phys_port_cnt; | |
1327 | } | |
1328 | ||
1329 | for (p = s; p <= e; ++p) { | |
7b4c8769 EC |
1330 | if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) |
1331 | continue; | |
1da177e4 LT |
1332 | dev = ipoib_add_port("ib%d", device, p); |
1333 | if (!IS_ERR(dev)) { | |
1334 | priv = netdev_priv(dev); | |
1335 | list_add_tail(&priv->list, dev_list); | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1340 | } | |
1341 | ||
1342 | static void ipoib_remove_one(struct ib_device *device) | |
1343 | { | |
1344 | struct ipoib_dev_priv *priv, *tmp; | |
1345 | struct list_head *dev_list; | |
1346 | ||
07ebafba TT |
1347 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1348 | return; | |
1349 | ||
1da177e4 LT |
1350 | dev_list = ib_get_client_data(device, &ipoib_client); |
1351 | ||
1352 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1353 | ib_unregister_event_handler(&priv->event_handler); | |
a77a57a1 RD |
1354 | |
1355 | rtnl_lock(); | |
1356 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
1357 | rtnl_unlock(); | |
1358 | ||
1359 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
1360 | |
1361 | unregister_netdev(priv->dev); | |
1362 | ipoib_dev_cleanup(priv->dev); | |
1363 | free_netdev(priv->dev); | |
1364 | } | |
06c56e44 MT |
1365 | |
1366 | kfree(dev_list); | |
1da177e4 LT |
1367 | } |
1368 | ||
1369 | static int __init ipoib_init_module(void) | |
1370 | { | |
1371 | int ret; | |
1372 | ||
0f485251 SM |
1373 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1374 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1375 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1376 | ||
1377 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1378 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
732eacc0 | 1379 | ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); |
68e995a2 PS |
1380 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
1381 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
1382 | #endif | |
0f485251 | 1383 | |
f89271da EC |
1384 | /* |
1385 | * When copying small received packets, we only copy from the | |
1386 | * linear data part of the SKB, so we rely on this condition. | |
1387 | */ | |
1388 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
1389 | ||
1da177e4 LT |
1390 | ret = ipoib_register_debugfs(); |
1391 | if (ret) | |
1392 | return ret; | |
1393 | ||
1394 | /* | |
1395 | * We create our own workqueue mainly because we want to be | |
1396 | * able to flush it when devices are being removed. We can't | |
1397 | * use schedule_work()/flush_scheduled_work() because both | |
1398 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1399 | * so flush_scheduled_work() can deadlock during device | |
1400 | * removal. | |
1401 | */ | |
1402 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1403 | if (!ipoib_workqueue) { | |
1404 | ret = -ENOMEM; | |
1405 | goto err_fs; | |
1406 | } | |
1407 | ||
c1a0b23b MT |
1408 | ib_sa_register_client(&ipoib_sa_client); |
1409 | ||
1da177e4 LT |
1410 | ret = ib_register_client(&ipoib_client); |
1411 | if (ret) | |
c1a0b23b | 1412 | goto err_sa; |
1da177e4 LT |
1413 | |
1414 | return 0; | |
1415 | ||
c1a0b23b MT |
1416 | err_sa: |
1417 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1418 | destroy_workqueue(ipoib_workqueue); |
1419 | ||
9adec1a8 RD |
1420 | err_fs: |
1421 | ipoib_unregister_debugfs(); | |
1422 | ||
1da177e4 LT |
1423 | return ret; |
1424 | } | |
1425 | ||
1426 | static void __exit ipoib_cleanup_module(void) | |
1427 | { | |
1da177e4 | 1428 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1429 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1430 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1431 | destroy_workqueue(ipoib_workqueue); |
1432 | } | |
1433 | ||
1434 | module_init(ipoib_init_module); | |
1435 | module_exit(ipoib_cleanup_module); |