Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
4 | * Copyright (c) 2004 Voltaire, Inc. All rights reserved. | |
1da177e4 LT |
5 | * |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
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 | ||
af40da89 VS |
63 | static int lro; |
64 | module_param(lro, bool, 0444); | |
65 | MODULE_PARM_DESC(lro, "Enable LRO (Large Receive Offload)"); | |
66 | ||
67 | static int lro_max_aggr = IPOIB_LRO_MAX_AGGR; | |
68 | module_param(lro_max_aggr, int, 0644); | |
69 | MODULE_PARM_DESC(lro_max_aggr, "LRO: Max packets to be aggregated " | |
70 | "(default = 64)"); | |
71 | ||
1da177e4 LT |
72 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
73 | int ipoib_debug_level; | |
74 | ||
75 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
76 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
77 | #endif | |
78 | ||
1732b0ef RD |
79 | struct ipoib_path_iter { |
80 | struct net_device *dev; | |
81 | struct ipoib_path path; | |
82 | }; | |
83 | ||
1da177e4 LT |
84 | static const u8 ipv4_bcast_addr[] = { |
85 | 0x00, 0xff, 0xff, 0xff, | |
86 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
87 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
88 | }; | |
89 | ||
90 | struct workqueue_struct *ipoib_workqueue; | |
91 | ||
c1a0b23b MT |
92 | struct ib_sa_client ipoib_sa_client; |
93 | ||
1da177e4 LT |
94 | static void ipoib_add_one(struct ib_device *device); |
95 | static void ipoib_remove_one(struct ib_device *device); | |
96 | ||
97 | static struct ib_client ipoib_client = { | |
98 | .name = "ipoib", | |
99 | .add = ipoib_add_one, | |
100 | .remove = ipoib_remove_one | |
101 | }; | |
102 | ||
103 | int ipoib_open(struct net_device *dev) | |
104 | { | |
105 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
106 | ||
107 | ipoib_dbg(priv, "bringing up interface\n"); | |
108 | ||
e028cc55 | 109 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
1da177e4 LT |
110 | |
111 | if (ipoib_pkey_dev_delay_open(dev)) | |
112 | return 0; | |
113 | ||
b8a1b1ce RD |
114 | if (ipoib_ib_dev_open(dev)) |
115 | goto err_disable; | |
fe25c561 | 116 | |
b8a1b1ce RD |
117 | if (ipoib_ib_dev_up(dev)) |
118 | goto err_stop; | |
1da177e4 LT |
119 | |
120 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
121 | struct ipoib_dev_priv *cpriv; | |
122 | ||
123 | /* Bring up any child interfaces too */ | |
95ed644f | 124 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
125 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
126 | int flags; | |
127 | ||
128 | flags = cpriv->dev->flags; | |
129 | if (flags & IFF_UP) | |
130 | continue; | |
131 | ||
132 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
133 | } | |
95ed644f | 134 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
135 | } |
136 | ||
137 | netif_start_queue(dev); | |
138 | ||
139 | return 0; | |
b8a1b1ce RD |
140 | |
141 | err_stop: | |
142 | ipoib_ib_dev_stop(dev, 1); | |
143 | ||
144 | err_disable: | |
b8a1b1ce RD |
145 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
146 | ||
147 | return -EINVAL; | |
1da177e4 LT |
148 | } |
149 | ||
150 | static int ipoib_stop(struct net_device *dev) | |
151 | { | |
152 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
153 | ||
154 | ipoib_dbg(priv, "stopping interface\n"); | |
155 | ||
156 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
157 | ||
158 | netif_stop_queue(dev); | |
159 | ||
a77a57a1 RD |
160 | ipoib_ib_dev_down(dev, 0); |
161 | ipoib_ib_dev_stop(dev, 0); | |
1da177e4 LT |
162 | |
163 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
164 | struct ipoib_dev_priv *cpriv; | |
165 | ||
166 | /* Bring down any child interfaces too */ | |
95ed644f | 167 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
168 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
169 | int flags; | |
170 | ||
171 | flags = cpriv->dev->flags; | |
172 | if (!(flags & IFF_UP)) | |
173 | continue; | |
174 | ||
175 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
176 | } | |
95ed644f | 177 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
178 | } |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) | |
184 | { | |
185 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
186 | ||
839fcaba | 187 | /* dev->mtu > 2K ==> connected mode */ |
586a6934 PS |
188 | if (ipoib_cm_admin_enabled(dev)) { |
189 | if (new_mtu > ipoib_cm_max_mtu(dev)) | |
190 | return -EINVAL; | |
191 | ||
839fcaba MT |
192 | if (new_mtu > priv->mcast_mtu) |
193 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
194 | priv->mcast_mtu); | |
586a6934 | 195 | |
839fcaba MT |
196 | dev->mtu = new_mtu; |
197 | return 0; | |
198 | } | |
199 | ||
bc7b3a36 | 200 | if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) |
1da177e4 LT |
201 | return -EINVAL; |
202 | ||
203 | priv->admin_mtu = new_mtu; | |
204 | ||
205 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
37c22a77 | 210 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
211 | { |
212 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
213 | struct rb_node *n = priv->path_tree.rb_node; | |
214 | struct ipoib_path *path; | |
215 | int ret; | |
216 | ||
217 | while (n) { | |
218 | path = rb_entry(n, struct ipoib_path, rb_node); | |
219 | ||
37c22a77 | 220 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
221 | sizeof (union ib_gid)); |
222 | ||
223 | if (ret < 0) | |
224 | n = n->rb_left; | |
225 | else if (ret > 0) | |
226 | n = n->rb_right; | |
227 | else | |
228 | return path; | |
229 | } | |
230 | ||
231 | return NULL; | |
232 | } | |
233 | ||
234 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
235 | { | |
236 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
237 | struct rb_node **n = &priv->path_tree.rb_node; | |
238 | struct rb_node *pn = NULL; | |
239 | struct ipoib_path *tpath; | |
240 | int ret; | |
241 | ||
242 | while (*n) { | |
243 | pn = *n; | |
244 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
245 | ||
246 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
247 | sizeof (union ib_gid)); | |
248 | if (ret < 0) | |
249 | n = &pn->rb_left; | |
250 | else if (ret > 0) | |
251 | n = &pn->rb_right; | |
252 | else | |
253 | return -EEXIST; | |
254 | } | |
255 | ||
256 | rb_link_node(&path->rb_node, pn, n); | |
257 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
258 | ||
259 | list_add_tail(&path->list, &priv->path_list); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
265 | { | |
266 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
267 | struct ipoib_neigh *neigh, *tn; | |
268 | struct sk_buff *skb; | |
269 | unsigned long flags; | |
270 | ||
271 | while ((skb = __skb_dequeue(&path->queue))) | |
272 | dev_kfree_skb_irq(skb); | |
273 | ||
274 | spin_lock_irqsave(&priv->lock, flags); | |
275 | ||
276 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
277 | /* | |
278 | * It's safe to call ipoib_put_ah() inside priv->lock | |
279 | * here, because we know that path->ah will always | |
280 | * hold one more reference, so ipoib_put_ah() will | |
281 | * never do more than decrement the ref count. | |
282 | */ | |
283 | if (neigh->ah) | |
284 | ipoib_put_ah(neigh->ah); | |
d2e0655e | 285 | |
2745b5b7 | 286 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
287 | } |
288 | ||
289 | spin_unlock_irqrestore(&priv->lock, flags); | |
290 | ||
291 | if (path->ah) | |
292 | ipoib_put_ah(path->ah); | |
293 | ||
294 | kfree(path); | |
295 | } | |
296 | ||
1732b0ef RD |
297 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
298 | ||
299 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
300 | { | |
301 | struct ipoib_path_iter *iter; | |
302 | ||
303 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
304 | if (!iter) | |
305 | return NULL; | |
306 | ||
307 | iter->dev = dev; | |
308 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
309 | ||
310 | if (ipoib_path_iter_next(iter)) { | |
311 | kfree(iter); | |
312 | return NULL; | |
313 | } | |
314 | ||
315 | return iter; | |
316 | } | |
317 | ||
318 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
319 | { | |
320 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
321 | struct rb_node *n; | |
322 | struct ipoib_path *path; | |
323 | int ret = 1; | |
324 | ||
325 | spin_lock_irq(&priv->lock); | |
326 | ||
327 | n = rb_first(&priv->path_tree); | |
328 | ||
329 | while (n) { | |
330 | path = rb_entry(n, struct ipoib_path, rb_node); | |
331 | ||
332 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
333 | sizeof (union ib_gid)) < 0) { | |
334 | iter->path = *path; | |
335 | ret = 0; | |
336 | break; | |
337 | } | |
338 | ||
339 | n = rb_next(n); | |
340 | } | |
341 | ||
342 | spin_unlock_irq(&priv->lock); | |
343 | ||
344 | return ret; | |
345 | } | |
346 | ||
347 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
348 | struct ipoib_path *path) | |
349 | { | |
350 | *path = iter->path; | |
351 | } | |
352 | ||
353 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
354 | ||
ee1e2c82 MS |
355 | void ipoib_mark_paths_invalid(struct net_device *dev) |
356 | { | |
357 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
358 | struct ipoib_path *path, *tp; | |
359 | ||
360 | spin_lock_irq(&priv->lock); | |
361 | ||
362 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
5b095d98 | 363 | ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", |
ee1e2c82 | 364 | be16_to_cpu(path->pathrec.dlid), |
fcace2fe | 365 | path->pathrec.dgid.raw); |
ee1e2c82 MS |
366 | path->valid = 0; |
367 | } | |
368 | ||
369 | spin_unlock_irq(&priv->lock); | |
370 | } | |
371 | ||
1da177e4 LT |
372 | void ipoib_flush_paths(struct net_device *dev) |
373 | { | |
374 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
375 | struct ipoib_path *path, *tp; | |
376 | LIST_HEAD(remove_list); | |
943c246e | 377 | unsigned long flags; |
1da177e4 | 378 | |
943c246e RD |
379 | netif_tx_lock_bh(dev); |
380 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 381 | |
157de229 | 382 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
383 | |
384 | list_for_each_entry(path, &remove_list, list) | |
385 | rb_erase(&path->rb_node, &priv->path_tree); | |
386 | ||
1da177e4 LT |
387 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
388 | if (path->query) | |
389 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
390 | spin_unlock_irqrestore(&priv->lock, flags); |
391 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
392 | wait_for_completion(&path->done); |
393 | path_free(dev, path); | |
943c246e RD |
394 | netif_tx_lock_bh(dev); |
395 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 396 | } |
943c246e RD |
397 | |
398 | spin_unlock_irqrestore(&priv->lock, flags); | |
399 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
400 | } |
401 | ||
402 | static void path_rec_completion(int status, | |
403 | struct ib_sa_path_rec *pathrec, | |
404 | void *path_ptr) | |
405 | { | |
406 | struct ipoib_path *path = path_ptr; | |
407 | struct net_device *dev = path->dev; | |
408 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
409 | struct ipoib_ah *ah = NULL; | |
c9da4bad | 410 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 411 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
412 | struct sk_buff_head skqueue; |
413 | struct sk_buff *skb; | |
414 | unsigned long flags; | |
415 | ||
843613b0 | 416 | if (!status) |
5b095d98 | 417 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
fcace2fe | 418 | be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); |
1da177e4 | 419 | else |
5b095d98 | 420 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 421 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
422 | |
423 | skb_queue_head_init(&skqueue); | |
424 | ||
425 | if (!status) { | |
46f1b3d7 SH |
426 | struct ib_ah_attr av; |
427 | ||
428 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
429 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
430 | } |
431 | ||
432 | spin_lock_irqsave(&priv->lock, flags); | |
433 | ||
1da177e4 LT |
434 | if (ah) { |
435 | path->pathrec = *pathrec; | |
436 | ||
c9da4bad RD |
437 | old_ah = path->ah; |
438 | path->ah = ah; | |
439 | ||
1da177e4 LT |
440 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
441 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
442 | ||
443 | while ((skb = __skb_dequeue(&path->queue))) | |
444 | __skb_queue_tail(&skqueue, skb); | |
445 | ||
d04d01b1 | 446 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
447 | if (neigh->ah) { |
448 | WARN_ON(neigh->ah != old_ah); | |
449 | /* | |
450 | * Dropping the ah reference inside | |
451 | * priv->lock is safe here, because we | |
452 | * will hold one more reference from | |
453 | * the original value of path->ah (ie | |
454 | * old_ah). | |
455 | */ | |
456 | ipoib_put_ah(neigh->ah); | |
457 | } | |
1da177e4 LT |
458 | kref_get(&path->ah->ref); |
459 | neigh->ah = path->ah; | |
8a7f7521 MT |
460 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
461 | sizeof(union ib_gid)); | |
1da177e4 | 462 | |
839fcaba MT |
463 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
464 | if (!ipoib_cm_get(neigh)) | |
465 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
466 | path, | |
467 | neigh)); | |
468 | if (!ipoib_cm_get(neigh)) { | |
469 | list_del(&neigh->list); | |
470 | if (neigh->ah) | |
471 | ipoib_put_ah(neigh->ah); | |
472 | ipoib_neigh_free(dev, neigh); | |
473 | continue; | |
474 | } | |
475 | } | |
476 | ||
1da177e4 LT |
477 | while ((skb = __skb_dequeue(&neigh->queue))) |
478 | __skb_queue_tail(&skqueue, skb); | |
479 | } | |
ee1e2c82 | 480 | path->valid = 1; |
5872a9fc | 481 | } |
1da177e4 | 482 | |
5872a9fc | 483 | path->query = NULL; |
1da177e4 LT |
484 | complete(&path->done); |
485 | ||
486 | spin_unlock_irqrestore(&priv->lock, flags); | |
487 | ||
ee1e2c82 MS |
488 | if (old_ah) |
489 | ipoib_put_ah(old_ah); | |
490 | ||
1da177e4 LT |
491 | while ((skb = __skb_dequeue(&skqueue))) { |
492 | skb->dev = dev; | |
493 | if (dev_queue_xmit(skb)) | |
494 | ipoib_warn(priv, "dev_queue_xmit failed " | |
495 | "to requeue packet\n"); | |
496 | } | |
497 | } | |
498 | ||
37c22a77 | 499 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
500 | { |
501 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
502 | struct ipoib_path *path; | |
503 | ||
1401b53a JM |
504 | if (!priv->broadcast) |
505 | return NULL; | |
506 | ||
21a38489 | 507 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
508 | if (!path) |
509 | return NULL; | |
510 | ||
21a38489 | 511 | path->dev = dev; |
1da177e4 LT |
512 | |
513 | skb_queue_head_init(&path->queue); | |
514 | ||
515 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 516 | |
37c22a77 | 517 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
2337f809 RD |
518 | path->pathrec.sgid = priv->local_gid; |
519 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
81668838 SH |
520 | path->pathrec.numb_path = 1; |
521 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
522 | |
523 | return path; | |
524 | } | |
525 | ||
526 | static int path_rec_start(struct net_device *dev, | |
527 | struct ipoib_path *path) | |
528 | { | |
529 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
530 | ||
5b095d98 | 531 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 532 | path->pathrec.dgid.raw); |
1da177e4 | 533 | |
65c7edda RD |
534 | init_completion(&path->done); |
535 | ||
1da177e4 | 536 | path->query_id = |
c1a0b23b | 537 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
538 | &path->pathrec, |
539 | IB_SA_PATH_REC_DGID | | |
540 | IB_SA_PATH_REC_SGID | | |
541 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 542 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
543 | IB_SA_PATH_REC_PKEY, |
544 | 1000, GFP_ATOMIC, | |
545 | path_rec_completion, | |
546 | path, &path->query); | |
547 | if (path->query_id < 0) { | |
01b3fc8b | 548 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 549 | path->query = NULL; |
93a3ab93 | 550 | complete(&path->done); |
1da177e4 LT |
551 | return path->query_id; |
552 | } | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
558 | { | |
559 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
560 | struct ipoib_path *path; | |
561 | struct ipoib_neigh *neigh; | |
943c246e | 562 | unsigned long flags; |
1da177e4 | 563 | |
adf30907 | 564 | neigh = ipoib_neigh_alloc(skb_dst(skb)->neighbour, skb->dev); |
1da177e4 | 565 | if (!neigh) { |
de903512 | 566 | ++dev->stats.tx_dropped; |
1da177e4 LT |
567 | dev_kfree_skb_any(skb); |
568 | return; | |
569 | } | |
570 | ||
943c246e | 571 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 572 | |
adf30907 | 573 | path = __path_find(dev, skb_dst(skb)->neighbour->ha + 4); |
1da177e4 | 574 | if (!path) { |
adf30907 | 575 | path = path_rec_create(dev, skb_dst(skb)->neighbour->ha + 4); |
1da177e4 | 576 | if (!path) |
d2e0655e | 577 | goto err_path; |
1da177e4 LT |
578 | |
579 | __path_add(dev, path); | |
580 | } | |
581 | ||
582 | list_add_tail(&neigh->list, &path->neigh_list); | |
583 | ||
47f7a071 | 584 | if (path->ah) { |
1da177e4 LT |
585 | kref_get(&path->ah->ref); |
586 | neigh->ah = path->ah; | |
8a7f7521 MT |
587 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
588 | sizeof(union ib_gid)); | |
1da177e4 | 589 | |
839fcaba MT |
590 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
591 | if (!ipoib_cm_get(neigh)) | |
592 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
593 | if (!ipoib_cm_get(neigh)) { | |
594 | list_del(&neigh->list); | |
595 | if (neigh->ah) | |
596 | ipoib_put_ah(neigh->ah); | |
597 | ipoib_neigh_free(dev, neigh); | |
598 | goto err_drop; | |
599 | } | |
600 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
601 | __skb_queue_tail(&neigh->queue, skb); | |
602 | else { | |
603 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
604 | skb_queue_len(&neigh->queue)); | |
605 | goto err_drop; | |
606 | } | |
721d67cd RD |
607 | } else { |
608 | spin_unlock_irqrestore(&priv->lock, flags); | |
adf30907 | 609 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb_dst(skb)->neighbour->ha)); |
721d67cd RD |
610 | return; |
611 | } | |
1da177e4 LT |
612 | } else { |
613 | neigh->ah = NULL; | |
1da177e4 LT |
614 | |
615 | if (!path->query && path_rec_start(dev, path)) | |
d2e0655e | 616 | goto err_list; |
2745b5b7 MT |
617 | |
618 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
619 | } |
620 | ||
943c246e | 621 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
622 | return; |
623 | ||
d2e0655e | 624 | err_list: |
1da177e4 | 625 | list_del(&neigh->list); |
1da177e4 | 626 | |
d2e0655e | 627 | err_path: |
2745b5b7 | 628 | ipoib_neigh_free(dev, neigh); |
839fcaba | 629 | err_drop: |
de903512 | 630 | ++dev->stats.tx_dropped; |
1da177e4 LT |
631 | dev_kfree_skb_any(skb); |
632 | ||
943c246e | 633 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
634 | } |
635 | ||
d70ed607 | 636 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
637 | { |
638 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
639 | ||
640 | /* Look up path record for unicasts */ | |
adf30907 | 641 | if (skb_dst(skb)->neighbour->ha[4] != 0xff) { |
1da177e4 LT |
642 | neigh_add_path(skb, dev); |
643 | return; | |
644 | } | |
645 | ||
646 | /* Add in the P_Key for multicasts */ | |
adf30907 ED |
647 | skb_dst(skb)->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; |
648 | skb_dst(skb)->neighbour->ha[9] = priv->pkey & 0xff; | |
649 | ipoib_mcast_send(dev, skb_dst(skb)->neighbour->ha + 4, skb); | |
1da177e4 LT |
650 | } |
651 | ||
652 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
653 | struct ipoib_pseudoheader *phdr) | |
654 | { | |
655 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
656 | struct ipoib_path *path; | |
943c246e | 657 | unsigned long flags; |
1da177e4 | 658 | |
943c246e | 659 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 660 | |
37c22a77 | 661 | path = __path_find(dev, phdr->hwaddr + 4); |
ee1e2c82 | 662 | if (!path || !path->valid) { |
71d98b46 JM |
663 | int new_path = 0; |
664 | ||
665 | if (!path) { | |
ee1e2c82 | 666 | path = path_rec_create(dev, phdr->hwaddr + 4); |
71d98b46 JM |
667 | new_path = 1; |
668 | } | |
1da177e4 LT |
669 | if (path) { |
670 | /* put pseudoheader back on for next time */ | |
671 | skb_push(skb, sizeof *phdr); | |
672 | __skb_queue_tail(&path->queue, skb); | |
673 | ||
ff79ae80 | 674 | if (!path->query && path_rec_start(dev, path)) { |
943c246e | 675 | spin_unlock_irqrestore(&priv->lock, flags); |
71d98b46 JM |
676 | if (new_path) |
677 | path_free(dev, path); | |
1da177e4 LT |
678 | return; |
679 | } else | |
680 | __path_add(dev, path); | |
681 | } else { | |
de903512 | 682 | ++dev->stats.tx_dropped; |
1da177e4 LT |
683 | dev_kfree_skb_any(skb); |
684 | } | |
685 | ||
943c246e | 686 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
687 | return; |
688 | } | |
689 | ||
47f7a071 | 690 | if (path->ah) { |
1da177e4 LT |
691 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
692 | be16_to_cpu(path->pathrec.dlid)); | |
693 | ||
721d67cd | 694 | spin_unlock_irqrestore(&priv->lock, flags); |
073ae841 | 695 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); |
721d67cd | 696 | return; |
1da177e4 LT |
697 | } else if ((path->query || !path_rec_start(dev, path)) && |
698 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
699 | /* put pseudoheader back on for next time */ | |
700 | skb_push(skb, sizeof *phdr); | |
701 | __skb_queue_tail(&path->queue, skb); | |
702 | } else { | |
de903512 | 703 | ++dev->stats.tx_dropped; |
1da177e4 LT |
704 | dev_kfree_skb_any(skb); |
705 | } | |
706 | ||
943c246e | 707 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
708 | } |
709 | ||
710 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
711 | { | |
712 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
713 | struct ipoib_neigh *neigh; | |
714 | unsigned long flags; | |
715 | ||
adf30907 ED |
716 | if (likely(skb_dst(skb) && skb_dst(skb)->neighbour)) { |
717 | if (unlikely(!*to_ipoib_neigh(skb_dst(skb)->neighbour))) { | |
d70ed607 | 718 | ipoib_path_lookup(skb, dev); |
943c246e | 719 | return NETDEV_TX_OK; |
1da177e4 LT |
720 | } |
721 | ||
adf30907 | 722 | neigh = *to_ipoib_neigh(skb_dst(skb)->neighbour); |
1da177e4 | 723 | |
a50df398 | 724 | if (unlikely((memcmp(&neigh->dgid.raw, |
adf30907 | 725 | skb_dst(skb)->neighbour->ha + 4, |
a50df398 YE |
726 | sizeof(union ib_gid))) || |
727 | (neigh->dev != dev))) { | |
728 | spin_lock_irqsave(&priv->lock, flags); | |
729 | /* | |
730 | * It's safe to call ipoib_put_ah() inside | |
731 | * priv->lock here, because we know that | |
732 | * path->ah will always hold one more reference, | |
733 | * so ipoib_put_ah() will never do more than | |
734 | * decrement the ref count. | |
735 | */ | |
736 | if (neigh->ah) | |
8a7f7521 | 737 | ipoib_put_ah(neigh->ah); |
a50df398 YE |
738 | list_del(&neigh->list); |
739 | ipoib_neigh_free(dev, neigh); | |
740 | spin_unlock_irqrestore(&priv->lock, flags); | |
741 | ipoib_path_lookup(skb, dev); | |
742 | return NETDEV_TX_OK; | |
743 | } | |
8a7f7521 | 744 | |
bafff974 OG |
745 | if (ipoib_cm_get(neigh)) { |
746 | if (ipoib_cm_up(neigh)) { | |
747 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
943c246e | 748 | return NETDEV_TX_OK; |
bafff974 OG |
749 | } |
750 | } else if (neigh->ah) { | |
adf30907 | 751 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb_dst(skb)->neighbour->ha)); |
943c246e | 752 | return NETDEV_TX_OK; |
1da177e4 LT |
753 | } |
754 | ||
755 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
943c246e | 756 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 757 | __skb_queue_tail(&neigh->queue, skb); |
943c246e | 758 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 759 | } else { |
de903512 | 760 | ++dev->stats.tx_dropped; |
1da177e4 LT |
761 | dev_kfree_skb_any(skb); |
762 | } | |
763 | } else { | |
764 | struct ipoib_pseudoheader *phdr = | |
765 | (struct ipoib_pseudoheader *) skb->data; | |
766 | skb_pull(skb, sizeof *phdr); | |
767 | ||
768 | if (phdr->hwaddr[4] == 0xff) { | |
769 | /* Add in the P_Key for multicast*/ | |
770 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
771 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
772 | ||
37c22a77 | 773 | ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); |
1da177e4 | 774 | } else { |
0dca0f7b | 775 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 776 | |
0dca0f7b HR |
777 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
778 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
5b095d98 | 779 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x %pI6\n", |
adf30907 | 780 | skb_dst(skb) ? "neigh" : "dst", |
97f52eb4 | 781 | be16_to_cpup((__be16 *) skb->data), |
073ae841 | 782 | IPOIB_QPN(phdr->hwaddr), |
fcace2fe | 783 | phdr->hwaddr + 4); |
1da177e4 | 784 | dev_kfree_skb_any(skb); |
de903512 | 785 | ++dev->stats.tx_dropped; |
943c246e | 786 | return NETDEV_TX_OK; |
1da177e4 LT |
787 | } |
788 | ||
789 | unicast_arp_send(skb, dev, phdr); | |
790 | } | |
791 | } | |
792 | ||
1da177e4 LT |
793 | return NETDEV_TX_OK; |
794 | } | |
795 | ||
1da177e4 LT |
796 | static void ipoib_timeout(struct net_device *dev) |
797 | { | |
798 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
799 | ||
4b2d319b RD |
800 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
801 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
802 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
803 | netif_queue_stopped(dev), | |
804 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
805 | /* XXX reset QP, etc. */ |
806 | } | |
807 | ||
808 | static int ipoib_hard_header(struct sk_buff *skb, | |
809 | struct net_device *dev, | |
810 | unsigned short type, | |
3b04ddde | 811 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
812 | { |
813 | struct ipoib_header *header; | |
814 | ||
815 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
816 | ||
817 | header->proto = htons(type); | |
818 | header->reserved = 0; | |
819 | ||
820 | /* | |
821 | * If we don't have a neighbour structure, stuff the | |
822 | * destination address onto the front of the skb so we can | |
823 | * figure out where to send the packet later. | |
824 | */ | |
adf30907 | 825 | if ((!skb_dst(skb) || !skb_dst(skb)->neighbour) && daddr) { |
1da177e4 LT |
826 | struct ipoib_pseudoheader *phdr = |
827 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
828 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
829 | } | |
830 | ||
831 | return 0; | |
832 | } | |
833 | ||
834 | static void ipoib_set_mcast_list(struct net_device *dev) | |
835 | { | |
836 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
837 | ||
7a343d4c LA |
838 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
839 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
840 | return; | |
841 | } | |
842 | ||
1ad62a19 | 843 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
844 | } |
845 | ||
ecbb4169 | 846 | static void ipoib_neigh_cleanup(struct neighbour *n) |
1da177e4 LT |
847 | { |
848 | struct ipoib_neigh *neigh; | |
849 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
850 | unsigned long flags; | |
851 | struct ipoib_ah *ah = NULL; | |
852 | ||
732a2170 | 853 | neigh = *to_ipoib_neigh(n); |
7bc531dd | 854 | if (neigh) |
732a2170 | 855 | priv = netdev_priv(neigh->dev); |
7bc531dd | 856 | else |
732a2170 | 857 | return; |
1da177e4 | 858 | ipoib_dbg(priv, |
5b095d98 | 859 | "neigh_cleanup for %06x %pI6\n", |
073ae841 | 860 | IPOIB_QPN(n->ha), |
fcace2fe | 861 | n->ha + 4); |
1da177e4 LT |
862 | |
863 | spin_lock_irqsave(&priv->lock, flags); | |
864 | ||
732a2170 MS |
865 | if (neigh->ah) |
866 | ah = neigh->ah; | |
867 | list_del(&neigh->list); | |
868 | ipoib_neigh_free(n->dev, neigh); | |
1da177e4 LT |
869 | |
870 | spin_unlock_irqrestore(&priv->lock, flags); | |
871 | ||
872 | if (ah) | |
873 | ipoib_put_ah(ah); | |
874 | } | |
875 | ||
732a2170 MS |
876 | struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour, |
877 | struct net_device *dev) | |
d2e0655e MT |
878 | { |
879 | struct ipoib_neigh *neigh; | |
880 | ||
881 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
882 | if (!neigh) | |
883 | return NULL; | |
884 | ||
885 | neigh->neighbour = neighbour; | |
732a2170 | 886 | neigh->dev = dev; |
0cd4d0fd | 887 | memset(&neigh->dgid.raw, 0, sizeof (union ib_gid)); |
d2e0655e | 888 | *to_ipoib_neigh(neighbour) = neigh; |
82b39913 | 889 | skb_queue_head_init(&neigh->queue); |
839fcaba | 890 | ipoib_cm_set(neigh, NULL); |
d2e0655e MT |
891 | |
892 | return neigh; | |
893 | } | |
894 | ||
2745b5b7 | 895 | void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh) |
d2e0655e | 896 | { |
2745b5b7 | 897 | struct sk_buff *skb; |
d2e0655e | 898 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
2745b5b7 | 899 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 900 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
901 | dev_kfree_skb_any(skb); |
902 | } | |
839fcaba MT |
903 | if (ipoib_cm_get(neigh)) |
904 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
d2e0655e MT |
905 | kfree(neigh); |
906 | } | |
907 | ||
1da177e4 LT |
908 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
909 | { | |
ecbb4169 | 910 | parms->neigh_cleanup = ipoib_neigh_cleanup; |
1da177e4 LT |
911 | |
912 | return 0; | |
913 | } | |
914 | ||
915 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
916 | { | |
917 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
918 | ||
919 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 920 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
921 | GFP_KERNEL); |
922 | if (!priv->rx_ring) { | |
923 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 924 | ca->name, ipoib_recvq_size); |
1da177e4 LT |
925 | goto out; |
926 | } | |
1da177e4 | 927 | |
10313cbb | 928 | priv->tx_ring = vmalloc(ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 LT |
929 | if (!priv->tx_ring) { |
930 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 931 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
932 | goto out_rx_ring_cleanup; |
933 | } | |
10313cbb | 934 | memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 | 935 | |
1b524963 | 936 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
937 | |
938 | if (ipoib_ib_dev_init(dev, ca, port)) | |
939 | goto out_tx_ring_cleanup; | |
940 | ||
941 | return 0; | |
942 | ||
943 | out_tx_ring_cleanup: | |
10313cbb | 944 | vfree(priv->tx_ring); |
1da177e4 LT |
945 | |
946 | out_rx_ring_cleanup: | |
947 | kfree(priv->rx_ring); | |
948 | ||
949 | out: | |
950 | return -ENOMEM; | |
951 | } | |
952 | ||
953 | void ipoib_dev_cleanup(struct net_device *dev) | |
954 | { | |
955 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
956 | ||
1732b0ef | 957 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
958 | |
959 | /* Delete any child interfaces first */ | |
960 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
961 | unregister_netdev(cpriv->dev); | |
962 | ipoib_dev_cleanup(cpriv->dev); | |
963 | free_netdev(cpriv->dev); | |
964 | } | |
965 | ||
966 | ipoib_ib_dev_cleanup(dev); | |
967 | ||
92a6b34b | 968 | kfree(priv->rx_ring); |
10313cbb | 969 | vfree(priv->tx_ring); |
1da177e4 | 970 | |
92a6b34b HR |
971 | priv->rx_ring = NULL; |
972 | priv->tx_ring = NULL; | |
1da177e4 LT |
973 | } |
974 | ||
3b04ddde SH |
975 | static const struct header_ops ipoib_header_ops = { |
976 | .create = ipoib_hard_header, | |
977 | }; | |
978 | ||
af40da89 VS |
979 | static int get_skb_hdr(struct sk_buff *skb, void **iphdr, |
980 | void **tcph, u64 *hdr_flags, void *priv) | |
981 | { | |
982 | unsigned int ip_len; | |
983 | struct iphdr *iph; | |
984 | ||
985 | if (unlikely(skb->protocol != htons(ETH_P_IP))) | |
986 | return -1; | |
987 | ||
988 | /* | |
989 | * In the future we may add an else clause that verifies the | |
990 | * checksum and allows devices which do not calculate checksum | |
991 | * to use LRO. | |
992 | */ | |
993 | if (unlikely(skb->ip_summed != CHECKSUM_UNNECESSARY)) | |
994 | return -1; | |
995 | ||
996 | /* Check for non-TCP packet */ | |
997 | skb_reset_network_header(skb); | |
998 | iph = ip_hdr(skb); | |
999 | if (iph->protocol != IPPROTO_TCP) | |
1000 | return -1; | |
1001 | ||
1002 | ip_len = ip_hdrlen(skb); | |
1003 | skb_set_transport_header(skb, ip_len); | |
1004 | *tcph = tcp_hdr(skb); | |
1005 | ||
1006 | /* check if IP header and TCP header are complete */ | |
1007 | if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) | |
1008 | return -1; | |
1009 | ||
1010 | *hdr_flags = LRO_IPV4 | LRO_TCP; | |
1011 | *iphdr = iph; | |
1012 | ||
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static void ipoib_lro_setup(struct ipoib_dev_priv *priv) | |
1017 | { | |
1018 | priv->lro.lro_mgr.max_aggr = lro_max_aggr; | |
1019 | priv->lro.lro_mgr.max_desc = IPOIB_MAX_LRO_DESCRIPTORS; | |
1020 | priv->lro.lro_mgr.lro_arr = priv->lro.lro_desc; | |
1021 | priv->lro.lro_mgr.get_skb_header = get_skb_hdr; | |
1022 | priv->lro.lro_mgr.features = LRO_F_NAPI; | |
1023 | priv->lro.lro_mgr.dev = priv->dev; | |
1024 | priv->lro.lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; | |
1025 | } | |
1026 | ||
fe8114e8 SH |
1027 | static const struct net_device_ops ipoib_netdev_ops = { |
1028 | .ndo_open = ipoib_open, | |
1029 | .ndo_stop = ipoib_stop, | |
1030 | .ndo_change_mtu = ipoib_change_mtu, | |
1031 | .ndo_start_xmit = ipoib_start_xmit, | |
1032 | .ndo_tx_timeout = ipoib_timeout, | |
1033 | .ndo_set_multicast_list = ipoib_set_mcast_list, | |
1034 | .ndo_neigh_setup = ipoib_neigh_setup_dev, | |
1035 | }; | |
1036 | ||
1da177e4 LT |
1037 | static void ipoib_setup(struct net_device *dev) |
1038 | { | |
1039 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1040 | ||
fe8114e8 | 1041 | dev->netdev_ops = &ipoib_netdev_ops; |
2337f809 | 1042 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 1043 | |
82c24c18 EC |
1044 | ipoib_set_ethtool_ops(dev); |
1045 | ||
bea3348e | 1046 | netif_napi_add(dev, &priv->napi, ipoib_poll, 100); |
1da177e4 | 1047 | |
2337f809 | 1048 | dev->watchdog_timeo = HZ; |
1da177e4 | 1049 | |
2337f809 | 1050 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 LT |
1051 | |
1052 | /* | |
1053 | * We add in INFINIBAND_ALEN to allow for the destination | |
1054 | * address "pseudoheader" for skbs without neighbour struct. | |
1055 | */ | |
2337f809 RD |
1056 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; |
1057 | dev->addr_len = INFINIBAND_ALEN; | |
1058 | dev->type = ARPHRD_INFINIBAND; | |
1059 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 1060 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 1061 | NETIF_F_HIGHDMA); |
86d15cd8 | 1062 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 | 1063 | |
1da177e4 LT |
1064 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
1065 | ||
1066 | netif_carrier_off(dev); | |
1067 | ||
1da177e4 LT |
1068 | priv->dev = dev; |
1069 | ||
af40da89 VS |
1070 | ipoib_lro_setup(priv); |
1071 | ||
1da177e4 | 1072 | spin_lock_init(&priv->lock); |
1da177e4 | 1073 | |
95ed644f | 1074 | mutex_init(&priv->vlan_mutex); |
1da177e4 LT |
1075 | |
1076 | INIT_LIST_HEAD(&priv->path_list); | |
1077 | INIT_LIST_HEAD(&priv->child_intfs); | |
1078 | INIT_LIST_HEAD(&priv->dead_ahs); | |
1079 | INIT_LIST_HEAD(&priv->multicast_list); | |
1080 | ||
26bbf13c | 1081 | INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); |
c4028958 | 1082 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 1083 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
1084 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
1085 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
1086 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
1087 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
1088 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
1da177e4 LT |
1089 | } |
1090 | ||
1091 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1092 | { | |
1093 | struct net_device *dev; | |
1094 | ||
1095 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
1096 | ipoib_setup); | |
1097 | if (!dev) | |
1098 | return NULL; | |
1099 | ||
1100 | return netdev_priv(dev); | |
1101 | } | |
1102 | ||
43cb76d9 GKH |
1103 | static ssize_t show_pkey(struct device *dev, |
1104 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1105 | { |
43cb76d9 | 1106 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1107 | |
1108 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1109 | } | |
43cb76d9 | 1110 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1111 | |
335a64a5 OG |
1112 | static ssize_t show_umcast(struct device *dev, |
1113 | struct device_attribute *attr, char *buf) | |
1114 | { | |
1115 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1116 | ||
1117 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1118 | } | |
1119 | ||
1120 | static ssize_t set_umcast(struct device *dev, | |
1121 | struct device_attribute *attr, | |
1122 | const char *buf, size_t count) | |
1123 | { | |
1124 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1125 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1126 | ||
1127 | if (umcast_val > 0) { | |
1128 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1129 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1130 | "by userspace\n"); | |
1131 | } else | |
1132 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1133 | ||
1134 | return count; | |
1135 | } | |
1136 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1137 | ||
1138 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1139 | { | |
1140 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1141 | } | |
1142 | ||
43cb76d9 GKH |
1143 | static ssize_t create_child(struct device *dev, |
1144 | struct device_attribute *attr, | |
1da177e4 LT |
1145 | const char *buf, size_t count) |
1146 | { | |
1147 | int pkey; | |
1148 | int ret; | |
1149 | ||
1150 | if (sscanf(buf, "%i", &pkey) != 1) | |
1151 | return -EINVAL; | |
1152 | ||
1153 | if (pkey < 0 || pkey > 0xffff) | |
1154 | return -EINVAL; | |
1155 | ||
4ce05937 RD |
1156 | /* |
1157 | * Set the full membership bit, so that we join the right | |
1158 | * broadcast group, etc. | |
1159 | */ | |
1160 | pkey |= 0x8000; | |
1161 | ||
43cb76d9 | 1162 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1163 | |
1164 | return ret ? ret : count; | |
1165 | } | |
7a52b34b | 1166 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 1167 | |
43cb76d9 GKH |
1168 | static ssize_t delete_child(struct device *dev, |
1169 | struct device_attribute *attr, | |
1da177e4 LT |
1170 | const char *buf, size_t count) |
1171 | { | |
1172 | int pkey; | |
1173 | int ret; | |
1174 | ||
1175 | if (sscanf(buf, "%i", &pkey) != 1) | |
1176 | return -EINVAL; | |
1177 | ||
1178 | if (pkey < 0 || pkey > 0xffff) | |
1179 | return -EINVAL; | |
1180 | ||
43cb76d9 | 1181 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1182 | |
1183 | return ret ? ret : count; | |
1184 | ||
1185 | } | |
7a52b34b | 1186 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
1187 | |
1188 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1189 | { | |
43cb76d9 | 1190 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1191 | } |
1192 | ||
83bb63f6 OG |
1193 | int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) |
1194 | { | |
1195 | struct ib_device_attr *device_attr; | |
1196 | int result = -ENOMEM; | |
1197 | ||
1198 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
1199 | if (!device_attr) { | |
1200 | printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", | |
1201 | hca->name, sizeof *device_attr); | |
1202 | return result; | |
1203 | } | |
1204 | ||
1205 | result = ib_query_device(hca, device_attr); | |
1206 | if (result) { | |
1207 | printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", | |
1208 | hca->name, result); | |
1209 | kfree(device_attr); | |
1210 | return result; | |
1211 | } | |
1212 | priv->hca_caps = device_attr->device_cap_flags; | |
1213 | ||
1214 | kfree(device_attr); | |
1215 | ||
1216 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
1217 | set_bit(IPOIB_FLAG_CSUM, &priv->flags); | |
1218 | priv->dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; | |
1219 | } | |
1220 | ||
1221 | if (lro) | |
1222 | priv->dev->features |= NETIF_F_LRO; | |
1223 | ||
1224 | if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) | |
1225 | priv->dev->features |= NETIF_F_TSO; | |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | ||
1da177e4 LT |
1231 | static struct net_device *ipoib_add_port(const char *format, |
1232 | struct ib_device *hca, u8 port) | |
1233 | { | |
1234 | struct ipoib_dev_priv *priv; | |
bc7b3a36 | 1235 | struct ib_port_attr attr; |
1da177e4 LT |
1236 | int result = -ENOMEM; |
1237 | ||
1238 | priv = ipoib_intf_alloc(format); | |
1239 | if (!priv) | |
1240 | goto alloc_mem_failed; | |
1241 | ||
1242 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
1243 | ||
bc7b3a36 SM |
1244 | if (!ib_query_port(hca, port, &attr)) |
1245 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); | |
1246 | else { | |
1247 | printk(KERN_WARNING "%s: ib_query_port %d failed\n", | |
1248 | hca->name, port); | |
1249 | goto device_init_failed; | |
1250 | } | |
1251 | ||
1252 | /* MTU will be reset when mcast join happens */ | |
1253 | priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1254 | priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; | |
1255 | ||
1da177e4 LT |
1256 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
1257 | if (result) { | |
1258 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1259 | hca->name, port, result); | |
ca6de177 | 1260 | goto device_init_failed; |
1da177e4 LT |
1261 | } |
1262 | ||
83bb63f6 | 1263 | if (ipoib_set_dev_features(priv, hca)) |
6046136c | 1264 | goto device_init_failed; |
af40da89 | 1265 | |
4ce05937 RD |
1266 | /* |
1267 | * Set the full membership bit, so that we join the right | |
1268 | * broadcast group, etc. | |
1269 | */ | |
1270 | priv->pkey |= 0x8000; | |
1271 | ||
1da177e4 LT |
1272 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1273 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1274 | ||
1275 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1276 | if (result) { | |
1277 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1278 | hca->name, port, result); | |
ca6de177 | 1279 | goto device_init_failed; |
1da177e4 LT |
1280 | } else |
1281 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1282 | ||
1da177e4 LT |
1283 | result = ipoib_dev_init(priv->dev, hca, port); |
1284 | if (result < 0) { | |
1285 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1286 | hca->name, port, result); | |
1287 | goto device_init_failed; | |
1288 | } | |
1289 | ||
1290 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1291 | priv->ca, ipoib_event); | |
1292 | result = ib_register_event_handler(&priv->event_handler); | |
1293 | if (result < 0) { | |
1294 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1295 | "port %d (ret = %d)\n", | |
1296 | hca->name, port, result); | |
1297 | goto event_failed; | |
1298 | } | |
1299 | ||
1300 | result = register_netdev(priv->dev); | |
1301 | if (result) { | |
1302 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1303 | hca->name, port, result); | |
1304 | goto register_failed; | |
1305 | } | |
1306 | ||
1732b0ef | 1307 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1308 | |
839fcaba MT |
1309 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1310 | goto sysfs_failed; | |
1da177e4 LT |
1311 | if (ipoib_add_pkey_attr(priv->dev)) |
1312 | goto sysfs_failed; | |
335a64a5 OG |
1313 | if (ipoib_add_umcast_attr(priv->dev)) |
1314 | goto sysfs_failed; | |
43cb76d9 | 1315 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1316 | goto sysfs_failed; |
43cb76d9 | 1317 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1318 | goto sysfs_failed; |
1319 | ||
1320 | return priv->dev; | |
1321 | ||
1322 | sysfs_failed: | |
1732b0ef | 1323 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1324 | unregister_netdev(priv->dev); |
1325 | ||
1326 | register_failed: | |
1327 | ib_unregister_event_handler(&priv->event_handler); | |
a77a57a1 | 1328 | flush_workqueue(ipoib_workqueue); |
1da177e4 LT |
1329 | |
1330 | event_failed: | |
1331 | ipoib_dev_cleanup(priv->dev); | |
1332 | ||
1333 | device_init_failed: | |
1334 | free_netdev(priv->dev); | |
1335 | ||
1336 | alloc_mem_failed: | |
1337 | return ERR_PTR(result); | |
1338 | } | |
1339 | ||
1340 | static void ipoib_add_one(struct ib_device *device) | |
1341 | { | |
1342 | struct list_head *dev_list; | |
1343 | struct net_device *dev; | |
1344 | struct ipoib_dev_priv *priv; | |
1345 | int s, e, p; | |
1346 | ||
07ebafba TT |
1347 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1348 | return; | |
1349 | ||
1da177e4 LT |
1350 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1351 | if (!dev_list) | |
1352 | return; | |
1353 | ||
1354 | INIT_LIST_HEAD(dev_list); | |
1355 | ||
07ebafba | 1356 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1357 | s = 0; |
1358 | e = 0; | |
1359 | } else { | |
1360 | s = 1; | |
1361 | e = device->phys_port_cnt; | |
1362 | } | |
1363 | ||
1364 | for (p = s; p <= e; ++p) { | |
1365 | dev = ipoib_add_port("ib%d", device, p); | |
1366 | if (!IS_ERR(dev)) { | |
1367 | priv = netdev_priv(dev); | |
1368 | list_add_tail(&priv->list, dev_list); | |
1369 | } | |
1370 | } | |
1371 | ||
1372 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1373 | } | |
1374 | ||
1375 | static void ipoib_remove_one(struct ib_device *device) | |
1376 | { | |
1377 | struct ipoib_dev_priv *priv, *tmp; | |
1378 | struct list_head *dev_list; | |
1379 | ||
07ebafba TT |
1380 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1381 | return; | |
1382 | ||
1da177e4 LT |
1383 | dev_list = ib_get_client_data(device, &ipoib_client); |
1384 | ||
1385 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1386 | ib_unregister_event_handler(&priv->event_handler); | |
a77a57a1 RD |
1387 | |
1388 | rtnl_lock(); | |
1389 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
1390 | rtnl_unlock(); | |
1391 | ||
1392 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
1393 | |
1394 | unregister_netdev(priv->dev); | |
1395 | ipoib_dev_cleanup(priv->dev); | |
1396 | free_netdev(priv->dev); | |
1397 | } | |
06c56e44 MT |
1398 | |
1399 | kfree(dev_list); | |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | static int __init ipoib_init_module(void) | |
1403 | { | |
1404 | int ret; | |
1405 | ||
0f485251 SM |
1406 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1407 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1408 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1409 | ||
1410 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1411 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
f56bcd80 EC |
1412 | ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE, |
1413 | IPOIB_MIN_QUEUE_SIZE)); | |
68e995a2 PS |
1414 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
1415 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
1416 | #endif | |
0f485251 | 1417 | |
f89271da EC |
1418 | /* |
1419 | * When copying small received packets, we only copy from the | |
1420 | * linear data part of the SKB, so we rely on this condition. | |
1421 | */ | |
1422 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
1423 | ||
1da177e4 LT |
1424 | ret = ipoib_register_debugfs(); |
1425 | if (ret) | |
1426 | return ret; | |
1427 | ||
1428 | /* | |
1429 | * We create our own workqueue mainly because we want to be | |
1430 | * able to flush it when devices are being removed. We can't | |
1431 | * use schedule_work()/flush_scheduled_work() because both | |
1432 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1433 | * so flush_scheduled_work() can deadlock during device | |
1434 | * removal. | |
1435 | */ | |
1436 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1437 | if (!ipoib_workqueue) { | |
1438 | ret = -ENOMEM; | |
1439 | goto err_fs; | |
1440 | } | |
1441 | ||
c1a0b23b MT |
1442 | ib_sa_register_client(&ipoib_sa_client); |
1443 | ||
1da177e4 LT |
1444 | ret = ib_register_client(&ipoib_client); |
1445 | if (ret) | |
c1a0b23b | 1446 | goto err_sa; |
1da177e4 LT |
1447 | |
1448 | return 0; | |
1449 | ||
c1a0b23b MT |
1450 | err_sa: |
1451 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1452 | destroy_workqueue(ipoib_workqueue); |
1453 | ||
9adec1a8 RD |
1454 | err_fs: |
1455 | ipoib_unregister_debugfs(); | |
1456 | ||
1da177e4 LT |
1457 | return ret; |
1458 | } | |
1459 | ||
1460 | static void __exit ipoib_cleanup_module(void) | |
1461 | { | |
1da177e4 | 1462 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1463 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1464 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1465 | destroy_workqueue(ipoib_workqueue); |
1466 | } | |
1467 | ||
1468 | module_init(ipoib_init_module); | |
1469 | module_exit(ipoib_cleanup_module); |