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 | ||
b63b70d8 SP |
49 | #include <linux/jhash.h> |
50 | #include <net/arp.h> | |
14c85021 | 51 | |
4b48680b YB |
52 | #define DRV_VERSION "1.0.0" |
53 | ||
54 | const char ipoib_driver_version[] = DRV_VERSION; | |
55 | ||
1da177e4 LT |
56 | MODULE_AUTHOR("Roland Dreier"); |
57 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
58 | MODULE_LICENSE("Dual BSD/GPL"); | |
4b48680b | 59 | MODULE_VERSION(DRV_VERSION); |
1da177e4 | 60 | |
0f485251 SM |
61 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
62 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
63 | ||
64 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
65 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
66 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
67 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
68 | ||
1da177e4 LT |
69 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
70 | int ipoib_debug_level; | |
71 | ||
72 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
73 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
74 | #endif | |
75 | ||
1732b0ef RD |
76 | struct ipoib_path_iter { |
77 | struct net_device *dev; | |
78 | struct ipoib_path path; | |
79 | }; | |
80 | ||
1da177e4 LT |
81 | static const u8 ipv4_bcast_addr[] = { |
82 | 0x00, 0xff, 0xff, 0xff, | |
83 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
84 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
85 | }; | |
86 | ||
87 | struct workqueue_struct *ipoib_workqueue; | |
88 | ||
c1a0b23b MT |
89 | struct ib_sa_client ipoib_sa_client; |
90 | ||
1da177e4 LT |
91 | static void ipoib_add_one(struct ib_device *device); |
92 | static void ipoib_remove_one(struct ib_device *device); | |
b63b70d8 | 93 | static void ipoib_neigh_reclaim(struct rcu_head *rp); |
1da177e4 LT |
94 | |
95 | static struct ib_client ipoib_client = { | |
96 | .name = "ipoib", | |
97 | .add = ipoib_add_one, | |
98 | .remove = ipoib_remove_one | |
99 | }; | |
100 | ||
101 | int ipoib_open(struct net_device *dev) | |
102 | { | |
103 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
104 | ||
105 | ipoib_dbg(priv, "bringing up interface\n"); | |
106 | ||
437708c4 MS |
107 | netif_carrier_off(dev); |
108 | ||
e028cc55 | 109 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
1da177e4 | 110 | |
dd57c930 AE |
111 | if (ipoib_ib_dev_open(dev, 1)) { |
112 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) | |
113 | return 0; | |
b8a1b1ce | 114 | goto err_disable; |
dd57c930 | 115 | } |
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 */ | |
f47944cc | 124 | down_read(&priv->vlan_rwsem); |
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 | } | |
f47944cc | 134 | up_read(&priv->vlan_rwsem); |
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 | ||
bea1e22d | 160 | ipoib_ib_dev_down(dev, 1); |
a77a57a1 | 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 */ | |
f47944cc | 167 | down_read(&priv->vlan_rwsem); |
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 | } | |
f47944cc | 177 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
178 | } |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
9baa0b03 OG |
183 | static void ipoib_uninit(struct net_device *dev) |
184 | { | |
185 | ipoib_dev_cleanup(dev); | |
186 | } | |
187 | ||
9ca36f7d | 188 | static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features) |
3d96c74d MM |
189 | { |
190 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
191 | ||
192 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
193 | features &= ~(NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO); | |
194 | ||
195 | return features; | |
196 | } | |
197 | ||
1da177e4 LT |
198 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
199 | { | |
200 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
201 | ||
839fcaba | 202 | /* dev->mtu > 2K ==> connected mode */ |
586a6934 PS |
203 | if (ipoib_cm_admin_enabled(dev)) { |
204 | if (new_mtu > ipoib_cm_max_mtu(dev)) | |
205 | return -EINVAL; | |
206 | ||
839fcaba MT |
207 | if (new_mtu > priv->mcast_mtu) |
208 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
209 | priv->mcast_mtu); | |
586a6934 | 210 | |
839fcaba MT |
211 | dev->mtu = new_mtu; |
212 | return 0; | |
213 | } | |
214 | ||
bc7b3a36 | 215 | if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) |
1da177e4 LT |
216 | return -EINVAL; |
217 | ||
218 | priv->admin_mtu = new_mtu; | |
219 | ||
220 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
71d9c5f9 RD |
225 | int ipoib_set_mode(struct net_device *dev, const char *buf) |
226 | { | |
227 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
228 | ||
229 | /* flush paths if we switch modes so that connections are restarted */ | |
230 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { | |
231 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
232 | ipoib_warn(priv, "enabling connected mode " | |
233 | "will cause multicast packet drops\n"); | |
234 | netdev_update_features(dev); | |
235 | rtnl_unlock(); | |
236 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; | |
237 | ||
238 | ipoib_flush_paths(dev); | |
239 | rtnl_lock(); | |
240 | return 0; | |
241 | } | |
242 | ||
243 | if (!strcmp(buf, "datagram\n")) { | |
244 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
245 | netdev_update_features(dev); | |
246 | dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); | |
247 | rtnl_unlock(); | |
248 | ipoib_flush_paths(dev); | |
249 | rtnl_lock(); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | return -EINVAL; | |
254 | } | |
255 | ||
37c22a77 | 256 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
257 | { |
258 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
259 | struct rb_node *n = priv->path_tree.rb_node; | |
260 | struct ipoib_path *path; | |
261 | int ret; | |
262 | ||
263 | while (n) { | |
264 | path = rb_entry(n, struct ipoib_path, rb_node); | |
265 | ||
37c22a77 | 266 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
267 | sizeof (union ib_gid)); |
268 | ||
269 | if (ret < 0) | |
270 | n = n->rb_left; | |
271 | else if (ret > 0) | |
272 | n = n->rb_right; | |
273 | else | |
274 | return path; | |
275 | } | |
276 | ||
277 | return NULL; | |
278 | } | |
279 | ||
280 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
281 | { | |
282 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
283 | struct rb_node **n = &priv->path_tree.rb_node; | |
284 | struct rb_node *pn = NULL; | |
285 | struct ipoib_path *tpath; | |
286 | int ret; | |
287 | ||
288 | while (*n) { | |
289 | pn = *n; | |
290 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
291 | ||
292 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
293 | sizeof (union ib_gid)); | |
294 | if (ret < 0) | |
295 | n = &pn->rb_left; | |
296 | else if (ret > 0) | |
297 | n = &pn->rb_right; | |
298 | else | |
299 | return -EEXIST; | |
300 | } | |
301 | ||
302 | rb_link_node(&path->rb_node, pn, n); | |
303 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
304 | ||
305 | list_add_tail(&path->list, &priv->path_list); | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
311 | { | |
1da177e4 | 312 | struct sk_buff *skb; |
1da177e4 LT |
313 | |
314 | while ((skb = __skb_dequeue(&path->queue))) | |
315 | dev_kfree_skb_irq(skb); | |
316 | ||
b63b70d8 | 317 | ipoib_dbg(netdev_priv(dev), "path_free\n"); |
1da177e4 | 318 | |
b63b70d8 SP |
319 | /* remove all neigh connected to this path */ |
320 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
1da177e4 LT |
321 | |
322 | if (path->ah) | |
323 | ipoib_put_ah(path->ah); | |
324 | ||
325 | kfree(path); | |
326 | } | |
327 | ||
1732b0ef RD |
328 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
329 | ||
330 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
331 | { | |
332 | struct ipoib_path_iter *iter; | |
333 | ||
334 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
335 | if (!iter) | |
336 | return NULL; | |
337 | ||
338 | iter->dev = dev; | |
339 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
340 | ||
341 | if (ipoib_path_iter_next(iter)) { | |
342 | kfree(iter); | |
343 | return NULL; | |
344 | } | |
345 | ||
346 | return iter; | |
347 | } | |
348 | ||
349 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
350 | { | |
351 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
352 | struct rb_node *n; | |
353 | struct ipoib_path *path; | |
354 | int ret = 1; | |
355 | ||
356 | spin_lock_irq(&priv->lock); | |
357 | ||
358 | n = rb_first(&priv->path_tree); | |
359 | ||
360 | while (n) { | |
361 | path = rb_entry(n, struct ipoib_path, rb_node); | |
362 | ||
363 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
364 | sizeof (union ib_gid)) < 0) { | |
365 | iter->path = *path; | |
366 | ret = 0; | |
367 | break; | |
368 | } | |
369 | ||
370 | n = rb_next(n); | |
371 | } | |
372 | ||
373 | spin_unlock_irq(&priv->lock); | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
378 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
379 | struct ipoib_path *path) | |
380 | { | |
381 | *path = iter->path; | |
382 | } | |
383 | ||
384 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
385 | ||
ee1e2c82 MS |
386 | void ipoib_mark_paths_invalid(struct net_device *dev) |
387 | { | |
388 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
389 | struct ipoib_path *path, *tp; | |
390 | ||
391 | spin_lock_irq(&priv->lock); | |
392 | ||
393 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
5b095d98 | 394 | ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", |
ee1e2c82 | 395 | be16_to_cpu(path->pathrec.dlid), |
fcace2fe | 396 | path->pathrec.dgid.raw); |
ee1e2c82 MS |
397 | path->valid = 0; |
398 | } | |
399 | ||
400 | spin_unlock_irq(&priv->lock); | |
401 | } | |
402 | ||
1da177e4 LT |
403 | void ipoib_flush_paths(struct net_device *dev) |
404 | { | |
405 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
406 | struct ipoib_path *path, *tp; | |
407 | LIST_HEAD(remove_list); | |
943c246e | 408 | unsigned long flags; |
1da177e4 | 409 | |
943c246e RD |
410 | netif_tx_lock_bh(dev); |
411 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 412 | |
157de229 | 413 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
414 | |
415 | list_for_each_entry(path, &remove_list, list) | |
416 | rb_erase(&path->rb_node, &priv->path_tree); | |
417 | ||
1da177e4 LT |
418 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
419 | if (path->query) | |
420 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
421 | spin_unlock_irqrestore(&priv->lock, flags); |
422 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
423 | wait_for_completion(&path->done); |
424 | path_free(dev, path); | |
943c246e RD |
425 | netif_tx_lock_bh(dev); |
426 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 427 | } |
943c246e RD |
428 | |
429 | spin_unlock_irqrestore(&priv->lock, flags); | |
430 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
431 | } |
432 | ||
433 | static void path_rec_completion(int status, | |
434 | struct ib_sa_path_rec *pathrec, | |
435 | void *path_ptr) | |
436 | { | |
437 | struct ipoib_path *path = path_ptr; | |
438 | struct net_device *dev = path->dev; | |
439 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
440 | struct ipoib_ah *ah = NULL; | |
c9da4bad | 441 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 442 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
443 | struct sk_buff_head skqueue; |
444 | struct sk_buff *skb; | |
445 | unsigned long flags; | |
446 | ||
843613b0 | 447 | if (!status) |
5b095d98 | 448 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
fcace2fe | 449 | be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); |
1da177e4 | 450 | else |
5b095d98 | 451 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 452 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
453 | |
454 | skb_queue_head_init(&skqueue); | |
455 | ||
456 | if (!status) { | |
46f1b3d7 SH |
457 | struct ib_ah_attr av; |
458 | ||
459 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
460 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
461 | } |
462 | ||
463 | spin_lock_irqsave(&priv->lock, flags); | |
464 | ||
3874397c | 465 | if (!IS_ERR_OR_NULL(ah)) { |
1da177e4 LT |
466 | path->pathrec = *pathrec; |
467 | ||
c9da4bad RD |
468 | old_ah = path->ah; |
469 | path->ah = ah; | |
470 | ||
1da177e4 LT |
471 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
472 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
473 | ||
474 | while ((skb = __skb_dequeue(&path->queue))) | |
475 | __skb_queue_tail(&skqueue, skb); | |
476 | ||
d04d01b1 | 477 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
478 | if (neigh->ah) { |
479 | WARN_ON(neigh->ah != old_ah); | |
480 | /* | |
481 | * Dropping the ah reference inside | |
482 | * priv->lock is safe here, because we | |
483 | * will hold one more reference from | |
484 | * the original value of path->ah (ie | |
485 | * old_ah). | |
486 | */ | |
487 | ipoib_put_ah(neigh->ah); | |
488 | } | |
1da177e4 LT |
489 | kref_get(&path->ah->ref); |
490 | neigh->ah = path->ah; | |
491 | ||
b63b70d8 | 492 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
493 | if (!ipoib_cm_get(neigh)) |
494 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
495 | path, | |
496 | neigh)); | |
497 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 498 | ipoib_neigh_free(neigh); |
839fcaba MT |
499 | continue; |
500 | } | |
501 | } | |
502 | ||
1da177e4 LT |
503 | while ((skb = __skb_dequeue(&neigh->queue))) |
504 | __skb_queue_tail(&skqueue, skb); | |
505 | } | |
ee1e2c82 | 506 | path->valid = 1; |
5872a9fc | 507 | } |
1da177e4 | 508 | |
5872a9fc | 509 | path->query = NULL; |
1da177e4 LT |
510 | complete(&path->done); |
511 | ||
512 | spin_unlock_irqrestore(&priv->lock, flags); | |
513 | ||
f72dd566 RD |
514 | if (IS_ERR_OR_NULL(ah)) |
515 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
516 | ||
ee1e2c82 MS |
517 | if (old_ah) |
518 | ipoib_put_ah(old_ah); | |
519 | ||
1da177e4 LT |
520 | while ((skb = __skb_dequeue(&skqueue))) { |
521 | skb->dev = dev; | |
522 | if (dev_queue_xmit(skb)) | |
523 | ipoib_warn(priv, "dev_queue_xmit failed " | |
524 | "to requeue packet\n"); | |
525 | } | |
526 | } | |
527 | ||
37c22a77 | 528 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
529 | { |
530 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
531 | struct ipoib_path *path; | |
532 | ||
1401b53a JM |
533 | if (!priv->broadcast) |
534 | return NULL; | |
535 | ||
21a38489 | 536 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
537 | if (!path) |
538 | return NULL; | |
539 | ||
21a38489 | 540 | path->dev = dev; |
1da177e4 LT |
541 | |
542 | skb_queue_head_init(&path->queue); | |
543 | ||
544 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 545 | |
37c22a77 | 546 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
2337f809 RD |
547 | path->pathrec.sgid = priv->local_gid; |
548 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
81668838 SH |
549 | path->pathrec.numb_path = 1; |
550 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
551 | |
552 | return path; | |
553 | } | |
554 | ||
555 | static int path_rec_start(struct net_device *dev, | |
556 | struct ipoib_path *path) | |
557 | { | |
558 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
559 | ||
5b095d98 | 560 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 561 | path->pathrec.dgid.raw); |
1da177e4 | 562 | |
65c7edda RD |
563 | init_completion(&path->done); |
564 | ||
1da177e4 | 565 | path->query_id = |
c1a0b23b | 566 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
567 | &path->pathrec, |
568 | IB_SA_PATH_REC_DGID | | |
569 | IB_SA_PATH_REC_SGID | | |
570 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 571 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
572 | IB_SA_PATH_REC_PKEY, |
573 | 1000, GFP_ATOMIC, | |
574 | path_rec_completion, | |
575 | path, &path->query); | |
576 | if (path->query_id < 0) { | |
01b3fc8b | 577 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 578 | path->query = NULL; |
93a3ab93 | 579 | complete(&path->done); |
1da177e4 LT |
580 | return path->query_id; |
581 | } | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
b63b70d8 SP |
586 | static void neigh_add_path(struct sk_buff *skb, u8 *daddr, |
587 | struct net_device *dev) | |
1da177e4 LT |
588 | { |
589 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
590 | struct ipoib_path *path; | |
591 | struct ipoib_neigh *neigh; | |
943c246e | 592 | unsigned long flags; |
1da177e4 | 593 | |
b5120a6e | 594 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 | 595 | neigh = ipoib_neigh_alloc(daddr, dev); |
1da177e4 | 596 | if (!neigh) { |
b5120a6e | 597 | spin_unlock_irqrestore(&priv->lock, flags); |
de903512 | 598 | ++dev->stats.tx_dropped; |
1da177e4 LT |
599 | dev_kfree_skb_any(skb); |
600 | return; | |
601 | } | |
602 | ||
b63b70d8 | 603 | path = __path_find(dev, daddr + 4); |
1da177e4 | 604 | if (!path) { |
b63b70d8 | 605 | path = path_rec_create(dev, daddr + 4); |
1da177e4 | 606 | if (!path) |
d2e0655e | 607 | goto err_path; |
1da177e4 LT |
608 | |
609 | __path_add(dev, path); | |
610 | } | |
611 | ||
612 | list_add_tail(&neigh->list, &path->neigh_list); | |
613 | ||
47f7a071 | 614 | if (path->ah) { |
1da177e4 LT |
615 | kref_get(&path->ah->ref); |
616 | neigh->ah = path->ah; | |
617 | ||
b63b70d8 | 618 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
619 | if (!ipoib_cm_get(neigh)) |
620 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
621 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 622 | ipoib_neigh_free(neigh); |
839fcaba MT |
623 | goto err_drop; |
624 | } | |
625 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
626 | __skb_queue_tail(&neigh->queue, skb); | |
627 | else { | |
628 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
629 | skb_queue_len(&neigh->queue)); | |
630 | goto err_drop; | |
631 | } | |
721d67cd RD |
632 | } else { |
633 | spin_unlock_irqrestore(&priv->lock, flags); | |
b63b70d8 SP |
634 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(daddr)); |
635 | ipoib_neigh_put(neigh); | |
721d67cd RD |
636 | return; |
637 | } | |
1da177e4 LT |
638 | } else { |
639 | neigh->ah = NULL; | |
1da177e4 LT |
640 | |
641 | if (!path->query && path_rec_start(dev, path)) | |
49b8e744 | 642 | goto err_path; |
2745b5b7 MT |
643 | |
644 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
645 | } |
646 | ||
943c246e | 647 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 648 | ipoib_neigh_put(neigh); |
1da177e4 LT |
649 | return; |
650 | ||
d2e0655e | 651 | err_path: |
b63b70d8 | 652 | ipoib_neigh_free(neigh); |
839fcaba | 653 | err_drop: |
de903512 | 654 | ++dev->stats.tx_dropped; |
1da177e4 LT |
655 | dev_kfree_skb_any(skb); |
656 | ||
943c246e | 657 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 658 | ipoib_neigh_put(neigh); |
1da177e4 LT |
659 | } |
660 | ||
661 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
936d7de3 | 662 | struct ipoib_cb *cb) |
1da177e4 LT |
663 | { |
664 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
665 | struct ipoib_path *path; | |
943c246e | 666 | unsigned long flags; |
1da177e4 | 667 | |
943c246e | 668 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 669 | |
936d7de3 | 670 | path = __path_find(dev, cb->hwaddr + 4); |
ee1e2c82 | 671 | if (!path || !path->valid) { |
71d98b46 JM |
672 | int new_path = 0; |
673 | ||
674 | if (!path) { | |
936d7de3 | 675 | path = path_rec_create(dev, cb->hwaddr + 4); |
71d98b46 JM |
676 | new_path = 1; |
677 | } | |
1da177e4 | 678 | if (path) { |
1da177e4 LT |
679 | __skb_queue_tail(&path->queue, skb); |
680 | ||
ff79ae80 | 681 | if (!path->query && path_rec_start(dev, path)) { |
943c246e | 682 | spin_unlock_irqrestore(&priv->lock, flags); |
71d98b46 JM |
683 | if (new_path) |
684 | path_free(dev, path); | |
1da177e4 LT |
685 | return; |
686 | } else | |
687 | __path_add(dev, path); | |
688 | } else { | |
de903512 | 689 | ++dev->stats.tx_dropped; |
1da177e4 LT |
690 | dev_kfree_skb_any(skb); |
691 | } | |
692 | ||
943c246e | 693 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
694 | return; |
695 | } | |
696 | ||
47f7a071 | 697 | if (path->ah) { |
1da177e4 LT |
698 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
699 | be16_to_cpu(path->pathrec.dlid)); | |
700 | ||
721d67cd | 701 | spin_unlock_irqrestore(&priv->lock, flags); |
936d7de3 | 702 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(cb->hwaddr)); |
721d67cd | 703 | return; |
1da177e4 LT |
704 | } else if ((path->query || !path_rec_start(dev, path)) && |
705 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
1da177e4 LT |
706 | __skb_queue_tail(&path->queue, skb); |
707 | } else { | |
de903512 | 708 | ++dev->stats.tx_dropped; |
1da177e4 LT |
709 | dev_kfree_skb_any(skb); |
710 | } | |
711 | ||
943c246e | 712 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
713 | } |
714 | ||
715 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
716 | { | |
717 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
718 | struct ipoib_neigh *neigh; | |
b63b70d8 SP |
719 | struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb; |
720 | struct ipoib_header *header; | |
1da177e4 LT |
721 | unsigned long flags; |
722 | ||
b63b70d8 SP |
723 | header = (struct ipoib_header *) skb->data; |
724 | ||
725 | if (unlikely(cb->hwaddr[4] == 0xff)) { | |
726 | /* multicast, arrange "if" according to probability */ | |
727 | if ((header->proto != htons(ETH_P_IP)) && | |
728 | (header->proto != htons(ETH_P_IPV6)) && | |
729 | (header->proto != htons(ETH_P_ARP)) && | |
dc850b0e PM |
730 | (header->proto != htons(ETH_P_RARP)) && |
731 | (header->proto != htons(ETH_P_TIPC))) { | |
b63b70d8 | 732 | /* ethertype not supported by IPoIB */ |
17e6abee DM |
733 | ++dev->stats.tx_dropped; |
734 | dev_kfree_skb_any(skb); | |
b63b70d8 | 735 | return NETDEV_TX_OK; |
17e6abee | 736 | } |
b63b70d8 SP |
737 | /* Add in the P_Key for multicast*/ |
738 | cb->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
739 | cb->hwaddr[9] = priv->pkey & 0xff; | |
740 | ||
741 | neigh = ipoib_neigh_get(dev, cb->hwaddr); | |
742 | if (likely(neigh)) | |
743 | goto send_using_neigh; | |
744 | ipoib_mcast_send(dev, cb->hwaddr, skb); | |
745 | return NETDEV_TX_OK; | |
17e6abee | 746 | } |
1da177e4 | 747 | |
b63b70d8 SP |
748 | /* unicast, arrange "switch" according to probability */ |
749 | switch (header->proto) { | |
750 | case htons(ETH_P_IP): | |
751 | case htons(ETH_P_IPV6): | |
dc850b0e | 752 | case htons(ETH_P_TIPC): |
b63b70d8 SP |
753 | neigh = ipoib_neigh_get(dev, cb->hwaddr); |
754 | if (unlikely(!neigh)) { | |
755 | neigh_add_path(skb, cb->hwaddr, dev); | |
756 | return NETDEV_TX_OK; | |
a50df398 | 757 | } |
b63b70d8 SP |
758 | break; |
759 | case htons(ETH_P_ARP): | |
760 | case htons(ETH_P_RARP): | |
761 | /* for unicast ARP and RARP should always perform path find */ | |
762 | unicast_arp_send(skb, dev, cb); | |
763 | return NETDEV_TX_OK; | |
764 | default: | |
765 | /* ethertype not supported by IPoIB */ | |
766 | ++dev->stats.tx_dropped; | |
767 | dev_kfree_skb_any(skb); | |
768 | return NETDEV_TX_OK; | |
769 | } | |
8a7f7521 | 770 | |
b63b70d8 SP |
771 | send_using_neigh: |
772 | /* note we now hold a ref to neigh */ | |
773 | if (ipoib_cm_get(neigh)) { | |
774 | if (ipoib_cm_up(neigh)) { | |
775 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
776 | goto unref; | |
1da177e4 | 777 | } |
b63b70d8 SP |
778 | } else if (neigh->ah) { |
779 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(cb->hwaddr)); | |
780 | goto unref; | |
781 | } | |
1da177e4 | 782 | |
b63b70d8 SP |
783 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
784 | spin_lock_irqsave(&priv->lock, flags); | |
785 | __skb_queue_tail(&neigh->queue, skb); | |
786 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 787 | } else { |
b63b70d8 SP |
788 | ++dev->stats.tx_dropped; |
789 | dev_kfree_skb_any(skb); | |
790 | } | |
1da177e4 | 791 | |
b63b70d8 SP |
792 | unref: |
793 | ipoib_neigh_put(neigh); | |
1da177e4 | 794 | |
1da177e4 LT |
795 | return NETDEV_TX_OK; |
796 | } | |
797 | ||
1da177e4 LT |
798 | static void ipoib_timeout(struct net_device *dev) |
799 | { | |
800 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
801 | ||
4b2d319b RD |
802 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
803 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
804 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
805 | netif_queue_stopped(dev), | |
806 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
807 | /* XXX reset QP, etc. */ |
808 | } | |
809 | ||
810 | static int ipoib_hard_header(struct sk_buff *skb, | |
811 | struct net_device *dev, | |
812 | unsigned short type, | |
3b04ddde | 813 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
814 | { |
815 | struct ipoib_header *header; | |
b63b70d8 | 816 | struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb; |
1da177e4 LT |
817 | |
818 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
819 | ||
820 | header->proto = htons(type); | |
821 | header->reserved = 0; | |
822 | ||
823 | /* | |
b63b70d8 | 824 | * we don't rely on dst_entry structure, always stuff the |
936d7de3 RD |
825 | * destination address into skb->cb so we can figure out where |
826 | * to send the packet later. | |
1da177e4 | 827 | */ |
b63b70d8 | 828 | memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN); |
1da177e4 | 829 | |
83bdd3b9 | 830 | return sizeof *header; |
1da177e4 LT |
831 | } |
832 | ||
833 | static void ipoib_set_mcast_list(struct net_device *dev) | |
834 | { | |
835 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
836 | ||
7a343d4c LA |
837 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
838 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
839 | return; | |
840 | } | |
841 | ||
1ad62a19 | 842 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
843 | } |
844 | ||
b63b70d8 | 845 | static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) |
1da177e4 | 846 | { |
b63b70d8 SP |
847 | /* |
848 | * Use only the address parts that contributes to spreading | |
849 | * The subnet prefix is not used as one can not connect to | |
850 | * same remote port (GUID) using the same remote QPN via two | |
851 | * different subnets. | |
852 | */ | |
853 | /* qpn octets[1:4) & port GUID octets[12:20) */ | |
9d1ad66e | 854 | u32 *d32 = (u32 *) daddr; |
b63b70d8 SP |
855 | u32 hv; |
856 | ||
9d1ad66e | 857 | hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0); |
b63b70d8 SP |
858 | return hv & htbl->mask; |
859 | } | |
860 | ||
861 | struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr) | |
862 | { | |
863 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
864 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
865 | struct ipoib_neigh_hash *htbl; | |
866 | struct ipoib_neigh *neigh = NULL; | |
867 | u32 hash_val; | |
868 | ||
869 | rcu_read_lock_bh(); | |
870 | ||
871 | htbl = rcu_dereference_bh(ntbl->htbl); | |
872 | ||
873 | if (!htbl) | |
874 | goto out_unlock; | |
875 | ||
876 | hash_val = ipoib_addr_hash(htbl, daddr); | |
877 | for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]); | |
878 | neigh != NULL; | |
879 | neigh = rcu_dereference_bh(neigh->hnext)) { | |
880 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { | |
881 | /* found, take one ref on behalf of the caller */ | |
882 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
883 | /* deleted */ | |
884 | neigh = NULL; | |
885 | goto out_unlock; | |
886 | } | |
887 | neigh->alive = jiffies; | |
888 | goto out_unlock; | |
889 | } | |
890 | } | |
891 | ||
892 | out_unlock: | |
893 | rcu_read_unlock_bh(); | |
894 | return neigh; | |
895 | } | |
896 | ||
897 | static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv) | |
898 | { | |
899 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
900 | struct ipoib_neigh_hash *htbl; | |
901 | unsigned long neigh_obsolete; | |
902 | unsigned long dt; | |
1da177e4 | 903 | unsigned long flags; |
b63b70d8 | 904 | int i; |
1da177e4 | 905 | |
b63b70d8 | 906 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) |
732a2170 | 907 | return; |
1da177e4 | 908 | |
b5120a6e | 909 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
910 | |
911 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 912 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
913 | |
914 | if (!htbl) | |
915 | goto out_unlock; | |
916 | ||
917 | /* neigh is obsolete if it was idle for two GC periods */ | |
918 | dt = 2 * arp_tbl.gc_interval; | |
919 | neigh_obsolete = jiffies - dt; | |
920 | /* handle possible race condition */ | |
921 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
922 | goto out_unlock; | |
923 | ||
924 | for (i = 0; i < htbl->size; i++) { | |
925 | struct ipoib_neigh *neigh; | |
926 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
927 | ||
928 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 929 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
930 | /* was the neigh idle for two GC periods */ |
931 | if (time_after(neigh_obsolete, neigh->alive)) { | |
932 | rcu_assign_pointer(*np, | |
933 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 934 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 935 | /* remove from path/mc list */ |
b63b70d8 | 936 | list_del(&neigh->list); |
b63b70d8 SP |
937 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
938 | } else { | |
939 | np = &neigh->hnext; | |
940 | } | |
1da177e4 | 941 | |
b63b70d8 SP |
942 | } |
943 | } | |
1da177e4 | 944 | |
b63b70d8 | 945 | out_unlock: |
b5120a6e | 946 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 947 | } |
1da177e4 | 948 | |
b63b70d8 SP |
949 | static void ipoib_reap_neigh(struct work_struct *work) |
950 | { | |
951 | struct ipoib_dev_priv *priv = | |
952 | container_of(work, struct ipoib_dev_priv, neigh_reap_task.work); | |
953 | ||
954 | __ipoib_reap_neigh(priv); | |
955 | ||
956 | if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
957 | queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task, | |
958 | arp_tbl.gc_interval); | |
1da177e4 LT |
959 | } |
960 | ||
b63b70d8 SP |
961 | |
962 | static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr, | |
732a2170 | 963 | struct net_device *dev) |
d2e0655e MT |
964 | { |
965 | struct ipoib_neigh *neigh; | |
966 | ||
b63b70d8 | 967 | neigh = kzalloc(sizeof *neigh, GFP_ATOMIC); |
d2e0655e MT |
968 | if (!neigh) |
969 | return NULL; | |
970 | ||
732a2170 | 971 | neigh->dev = dev; |
b63b70d8 | 972 | memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr)); |
82b39913 | 973 | skb_queue_head_init(&neigh->queue); |
b63b70d8 | 974 | INIT_LIST_HEAD(&neigh->list); |
839fcaba | 975 | ipoib_cm_set(neigh, NULL); |
b63b70d8 SP |
976 | /* one ref on behalf of the caller */ |
977 | atomic_set(&neigh->refcnt, 1); | |
978 | ||
979 | return neigh; | |
980 | } | |
981 | ||
982 | struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr, | |
983 | struct net_device *dev) | |
984 | { | |
985 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
986 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
987 | struct ipoib_neigh_hash *htbl; | |
988 | struct ipoib_neigh *neigh; | |
989 | u32 hash_val; | |
990 | ||
b63b70d8 | 991 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 992 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
993 | if (!htbl) { |
994 | neigh = NULL; | |
995 | goto out_unlock; | |
996 | } | |
997 | ||
998 | /* need to add a new neigh, but maybe some other thread succeeded? | |
999 | * recalc hash, maybe hash resize took place so we do a search | |
1000 | */ | |
1001 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1002 | for (neigh = rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1003 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1004 | neigh != NULL; |
1005 | neigh = rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1006 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1007 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { |
1008 | /* found, take one ref on behalf of the caller */ | |
1009 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1010 | /* deleted */ | |
1011 | neigh = NULL; | |
1012 | break; | |
1013 | } | |
1014 | neigh->alive = jiffies; | |
1015 | goto out_unlock; | |
1016 | } | |
1017 | } | |
1018 | ||
1019 | neigh = ipoib_neigh_ctor(daddr, dev); | |
1020 | if (!neigh) | |
1021 | goto out_unlock; | |
1022 | ||
1023 | /* one ref on behalf of the hash table */ | |
1024 | atomic_inc(&neigh->refcnt); | |
1025 | neigh->alive = jiffies; | |
1026 | /* put in hash */ | |
1027 | rcu_assign_pointer(neigh->hnext, | |
1028 | rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1029 | lockdep_is_held(&priv->lock))); |
b63b70d8 SP |
1030 | rcu_assign_pointer(htbl->buckets[hash_val], neigh); |
1031 | atomic_inc(&ntbl->entries); | |
1032 | ||
1033 | out_unlock: | |
d2e0655e MT |
1034 | |
1035 | return neigh; | |
1036 | } | |
1037 | ||
b63b70d8 | 1038 | void ipoib_neigh_dtor(struct ipoib_neigh *neigh) |
d2e0655e | 1039 | { |
b63b70d8 SP |
1040 | /* neigh reference count was dropprd to zero */ |
1041 | struct net_device *dev = neigh->dev; | |
1042 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2745b5b7 | 1043 | struct sk_buff *skb; |
b63b70d8 SP |
1044 | if (neigh->ah) |
1045 | ipoib_put_ah(neigh->ah); | |
2745b5b7 | 1046 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 1047 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
1048 | dev_kfree_skb_any(skb); |
1049 | } | |
839fcaba MT |
1050 | if (ipoib_cm_get(neigh)) |
1051 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
b63b70d8 SP |
1052 | ipoib_dbg(netdev_priv(dev), |
1053 | "neigh free for %06x %pI6\n", | |
1054 | IPOIB_QPN(neigh->daddr), | |
1055 | neigh->daddr + 4); | |
d2e0655e | 1056 | kfree(neigh); |
b63b70d8 SP |
1057 | if (atomic_dec_and_test(&priv->ntbl.entries)) { |
1058 | if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags)) | |
1059 | complete(&priv->ntbl.flushed); | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | static void ipoib_neigh_reclaim(struct rcu_head *rp) | |
1064 | { | |
1065 | /* Called as a result of removal from hash table */ | |
1066 | struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu); | |
1067 | /* note TX context may hold another ref */ | |
1068 | ipoib_neigh_put(neigh); | |
d2e0655e MT |
1069 | } |
1070 | ||
b63b70d8 | 1071 | void ipoib_neigh_free(struct ipoib_neigh *neigh) |
1da177e4 | 1072 | { |
b63b70d8 SP |
1073 | struct net_device *dev = neigh->dev; |
1074 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1075 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1076 | struct ipoib_neigh_hash *htbl; | |
1077 | struct ipoib_neigh __rcu **np; | |
1078 | struct ipoib_neigh *n; | |
1079 | u32 hash_val; | |
1080 | ||
b63b70d8 | 1081 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1082 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1083 | if (!htbl) |
b5120a6e | 1084 | return; |
b63b70d8 SP |
1085 | |
1086 | hash_val = ipoib_addr_hash(htbl, neigh->daddr); | |
1087 | np = &htbl->buckets[hash_val]; | |
1088 | for (n = rcu_dereference_protected(*np, | |
b5120a6e | 1089 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1090 | n != NULL; |
6c723a68 | 1091 | n = rcu_dereference_protected(*np, |
b5120a6e | 1092 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1093 | if (n == neigh) { |
1094 | /* found */ | |
1095 | rcu_assign_pointer(*np, | |
1096 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1097 | lockdep_is_held(&priv->lock))); |
49b8e744 JF |
1098 | /* remove from parent list */ |
1099 | list_del(&neigh->list); | |
b63b70d8 | 1100 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
b5120a6e | 1101 | return; |
b63b70d8 SP |
1102 | } else { |
1103 | np = &n->hnext; | |
1104 | } | |
1105 | } | |
b63b70d8 SP |
1106 | } |
1107 | ||
1108 | static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) | |
1109 | { | |
1110 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1111 | struct ipoib_neigh_hash *htbl; | |
1112 | struct ipoib_neigh **buckets; | |
1113 | u32 size; | |
1114 | ||
1115 | clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); | |
1116 | ntbl->htbl = NULL; | |
b63b70d8 SP |
1117 | htbl = kzalloc(sizeof(*htbl), GFP_KERNEL); |
1118 | if (!htbl) | |
1119 | return -ENOMEM; | |
1120 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1121 | size = roundup_pow_of_two(arp_tbl.gc_thresh3); | |
1122 | buckets = kzalloc(size * sizeof(*buckets), GFP_KERNEL); | |
1123 | if (!buckets) { | |
1124 | kfree(htbl); | |
1125 | return -ENOMEM; | |
1126 | } | |
1127 | htbl->size = size; | |
1128 | htbl->mask = (size - 1); | |
1129 | htbl->buckets = buckets; | |
1130 | ntbl->htbl = htbl; | |
66172c09 | 1131 | htbl->ntbl = ntbl; |
b63b70d8 SP |
1132 | atomic_set(&ntbl->entries, 0); |
1133 | ||
1134 | /* start garbage collection */ | |
1135 | clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1136 | queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task, | |
1137 | arp_tbl.gc_interval); | |
1da177e4 LT |
1138 | |
1139 | return 0; | |
1140 | } | |
1141 | ||
b63b70d8 SP |
1142 | static void neigh_hash_free_rcu(struct rcu_head *head) |
1143 | { | |
1144 | struct ipoib_neigh_hash *htbl = container_of(head, | |
1145 | struct ipoib_neigh_hash, | |
1146 | rcu); | |
1147 | struct ipoib_neigh __rcu **buckets = htbl->buckets; | |
66172c09 | 1148 | struct ipoib_neigh_table *ntbl = htbl->ntbl; |
b63b70d8 SP |
1149 | |
1150 | kfree(buckets); | |
1151 | kfree(htbl); | |
66172c09 | 1152 | complete(&ntbl->deleted); |
b63b70d8 SP |
1153 | } |
1154 | ||
1155 | void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid) | |
1156 | { | |
1157 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1158 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1159 | struct ipoib_neigh_hash *htbl; | |
1160 | unsigned long flags; | |
1161 | int i; | |
1162 | ||
1163 | /* remove all neigh connected to a given path or mcast */ | |
b5120a6e | 1164 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1165 | |
1166 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1167 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1168 | |
1169 | if (!htbl) | |
1170 | goto out_unlock; | |
1171 | ||
1172 | for (i = 0; i < htbl->size; i++) { | |
1173 | struct ipoib_neigh *neigh; | |
1174 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1175 | ||
1176 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1177 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1178 | /* delete neighs belong to this parent */ |
1179 | if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) { | |
1180 | rcu_assign_pointer(*np, | |
1181 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1182 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1183 | /* remove from parent list */ |
b63b70d8 | 1184 | list_del(&neigh->list); |
b63b70d8 SP |
1185 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1186 | } else { | |
1187 | np = &neigh->hnext; | |
1188 | } | |
1189 | ||
1190 | } | |
1191 | } | |
1192 | out_unlock: | |
b5120a6e | 1193 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 SP |
1194 | } |
1195 | ||
1196 | static void ipoib_flush_neighs(struct ipoib_dev_priv *priv) | |
1197 | { | |
1198 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1199 | struct ipoib_neigh_hash *htbl; | |
1200 | unsigned long flags; | |
66172c09 | 1201 | int i, wait_flushed = 0; |
b63b70d8 | 1202 | |
66172c09 | 1203 | init_completion(&priv->ntbl.flushed); |
b63b70d8 | 1204 | |
b5120a6e | 1205 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1206 | |
1207 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1208 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1209 | if (!htbl) |
1210 | goto out_unlock; | |
1211 | ||
66172c09 SP |
1212 | wait_flushed = atomic_read(&priv->ntbl.entries); |
1213 | if (!wait_flushed) | |
1214 | goto free_htbl; | |
1215 | ||
b63b70d8 SP |
1216 | for (i = 0; i < htbl->size; i++) { |
1217 | struct ipoib_neigh *neigh; | |
1218 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1219 | ||
1220 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1221 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1222 | rcu_assign_pointer(*np, |
1223 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1224 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1225 | /* remove from path/mc list */ |
b63b70d8 | 1226 | list_del(&neigh->list); |
b63b70d8 SP |
1227 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1228 | } | |
1229 | } | |
1230 | ||
66172c09 | 1231 | free_htbl: |
b63b70d8 SP |
1232 | rcu_assign_pointer(ntbl->htbl, NULL); |
1233 | call_rcu(&htbl->rcu, neigh_hash_free_rcu); | |
1234 | ||
1235 | out_unlock: | |
b5120a6e | 1236 | spin_unlock_irqrestore(&priv->lock, flags); |
66172c09 SP |
1237 | if (wait_flushed) |
1238 | wait_for_completion(&priv->ntbl.flushed); | |
b63b70d8 SP |
1239 | } |
1240 | ||
1241 | static void ipoib_neigh_hash_uninit(struct net_device *dev) | |
1242 | { | |
1243 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1244 | int stopped; | |
1245 | ||
1246 | ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n"); | |
66172c09 | 1247 | init_completion(&priv->ntbl.deleted); |
b63b70d8 SP |
1248 | set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); |
1249 | ||
1250 | /* Stop GC if called at init fail need to cancel work */ | |
1251 | stopped = test_and_set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1252 | if (!stopped) | |
1253 | cancel_delayed_work(&priv->neigh_reap_task); | |
1254 | ||
66172c09 SP |
1255 | ipoib_flush_neighs(priv); |
1256 | ||
1257 | wait_for_completion(&priv->ntbl.deleted); | |
b63b70d8 SP |
1258 | } |
1259 | ||
1260 | ||
1da177e4 LT |
1261 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
1262 | { | |
1263 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1264 | ||
b63b70d8 SP |
1265 | if (ipoib_neigh_hash_init(priv) < 0) |
1266 | goto out; | |
1da177e4 | 1267 | /* Allocate RX/TX "rings" to hold queued skbs */ |
0f485251 | 1268 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
1269 | GFP_KERNEL); |
1270 | if (!priv->rx_ring) { | |
1271 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 1272 | ca->name, ipoib_recvq_size); |
b63b70d8 | 1273 | goto out_neigh_hash_cleanup; |
1da177e4 | 1274 | } |
1da177e4 | 1275 | |
948579cd | 1276 | priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 LT |
1277 | if (!priv->tx_ring) { |
1278 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 1279 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
1280 | goto out_rx_ring_cleanup; |
1281 | } | |
1da177e4 | 1282 | |
1b524963 | 1283 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
1284 | |
1285 | if (ipoib_ib_dev_init(dev, ca, port)) | |
1286 | goto out_tx_ring_cleanup; | |
1287 | ||
1288 | return 0; | |
1289 | ||
1290 | out_tx_ring_cleanup: | |
10313cbb | 1291 | vfree(priv->tx_ring); |
1da177e4 LT |
1292 | |
1293 | out_rx_ring_cleanup: | |
1294 | kfree(priv->rx_ring); | |
1295 | ||
b63b70d8 SP |
1296 | out_neigh_hash_cleanup: |
1297 | ipoib_neigh_hash_uninit(dev); | |
1da177e4 LT |
1298 | out: |
1299 | return -ENOMEM; | |
1300 | } | |
1301 | ||
1302 | void ipoib_dev_cleanup(struct net_device *dev) | |
1303 | { | |
1304 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
9baa0b03 OG |
1305 | LIST_HEAD(head); |
1306 | ||
1307 | ASSERT_RTNL(); | |
1da177e4 | 1308 | |
1732b0ef | 1309 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
1310 | |
1311 | /* Delete any child interfaces first */ | |
1312 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
b63b70d8 SP |
1313 | /* Stop GC on child */ |
1314 | set_bit(IPOIB_STOP_NEIGH_GC, &cpriv->flags); | |
1315 | cancel_delayed_work(&cpriv->neigh_reap_task); | |
9baa0b03 | 1316 | unregister_netdevice_queue(cpriv->dev, &head); |
1da177e4 | 1317 | } |
9baa0b03 | 1318 | unregister_netdevice_many(&head); |
1da177e4 LT |
1319 | |
1320 | ipoib_ib_dev_cleanup(dev); | |
1321 | ||
92a6b34b | 1322 | kfree(priv->rx_ring); |
10313cbb | 1323 | vfree(priv->tx_ring); |
1da177e4 | 1324 | |
92a6b34b HR |
1325 | priv->rx_ring = NULL; |
1326 | priv->tx_ring = NULL; | |
b63b70d8 SP |
1327 | |
1328 | ipoib_neigh_hash_uninit(dev); | |
1da177e4 LT |
1329 | } |
1330 | ||
3b04ddde SH |
1331 | static const struct header_ops ipoib_header_ops = { |
1332 | .create = ipoib_hard_header, | |
1333 | }; | |
1334 | ||
fe8114e8 | 1335 | static const struct net_device_ops ipoib_netdev_ops = { |
9baa0b03 | 1336 | .ndo_uninit = ipoib_uninit, |
fe8114e8 SH |
1337 | .ndo_open = ipoib_open, |
1338 | .ndo_stop = ipoib_stop, | |
1339 | .ndo_change_mtu = ipoib_change_mtu, | |
3d96c74d | 1340 | .ndo_fix_features = ipoib_fix_features, |
fe8114e8 SH |
1341 | .ndo_start_xmit = ipoib_start_xmit, |
1342 | .ndo_tx_timeout = ipoib_timeout, | |
afc4b13d | 1343 | .ndo_set_rx_mode = ipoib_set_mcast_list, |
fe8114e8 SH |
1344 | }; |
1345 | ||
9baa0b03 | 1346 | void ipoib_setup(struct net_device *dev) |
1da177e4 LT |
1347 | { |
1348 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1349 | ||
fe8114e8 | 1350 | dev->netdev_ops = &ipoib_netdev_ops; |
2337f809 | 1351 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 1352 | |
82c24c18 EC |
1353 | ipoib_set_ethtool_ops(dev); |
1354 | ||
7f1a3867 | 1355 | netif_napi_add(dev, &priv->napi, ipoib_poll, NAPI_POLL_WEIGHT); |
1da177e4 | 1356 | |
2337f809 | 1357 | dev->watchdog_timeo = HZ; |
1da177e4 | 1358 | |
2337f809 | 1359 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 | 1360 | |
936d7de3 | 1361 | dev->hard_header_len = IPOIB_ENCAP_LEN; |
2337f809 RD |
1362 | dev->addr_len = INFINIBAND_ALEN; |
1363 | dev->type = ARPHRD_INFINIBAND; | |
1364 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 1365 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 1366 | NETIF_F_HIGHDMA); |
86d15cd8 | 1367 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 | 1368 | |
1da177e4 LT |
1369 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
1370 | ||
1da177e4 LT |
1371 | priv->dev = dev; |
1372 | ||
1373 | spin_lock_init(&priv->lock); | |
1da177e4 | 1374 | |
f47944cc | 1375 | init_rwsem(&priv->vlan_rwsem); |
1da177e4 LT |
1376 | |
1377 | INIT_LIST_HEAD(&priv->path_list); | |
1378 | INIT_LIST_HEAD(&priv->child_intfs); | |
1379 | INIT_LIST_HEAD(&priv->dead_ahs); | |
1380 | INIT_LIST_HEAD(&priv->multicast_list); | |
1381 | ||
c4028958 | 1382 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 1383 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
1384 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
1385 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
1386 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
1387 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
1388 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
b63b70d8 | 1389 | INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh); |
1da177e4 LT |
1390 | } |
1391 | ||
1392 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1393 | { | |
1394 | struct net_device *dev; | |
1395 | ||
1396 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
1397 | ipoib_setup); | |
1398 | if (!dev) | |
1399 | return NULL; | |
1400 | ||
1401 | return netdev_priv(dev); | |
1402 | } | |
1403 | ||
43cb76d9 GKH |
1404 | static ssize_t show_pkey(struct device *dev, |
1405 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1406 | { |
43cb76d9 | 1407 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1408 | |
1409 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1410 | } | |
43cb76d9 | 1411 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1412 | |
335a64a5 OG |
1413 | static ssize_t show_umcast(struct device *dev, |
1414 | struct device_attribute *attr, char *buf) | |
1415 | { | |
1416 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1417 | ||
1418 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1419 | } | |
1420 | ||
862096a8 | 1421 | void ipoib_set_umcast(struct net_device *ndev, int umcast_val) |
335a64a5 | 1422 | { |
862096a8 | 1423 | struct ipoib_dev_priv *priv = netdev_priv(ndev); |
335a64a5 OG |
1424 | |
1425 | if (umcast_val > 0) { | |
1426 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1427 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1428 | "by userspace\n"); | |
1429 | } else | |
1430 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
862096a8 OG |
1431 | } |
1432 | ||
1433 | static ssize_t set_umcast(struct device *dev, | |
1434 | struct device_attribute *attr, | |
1435 | const char *buf, size_t count) | |
1436 | { | |
1437 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1438 | ||
1439 | ipoib_set_umcast(to_net_dev(dev), umcast_val); | |
335a64a5 OG |
1440 | |
1441 | return count; | |
1442 | } | |
1443 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1444 | ||
1445 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1446 | { | |
1447 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1448 | } | |
1449 | ||
43cb76d9 GKH |
1450 | static ssize_t create_child(struct device *dev, |
1451 | struct device_attribute *attr, | |
1da177e4 LT |
1452 | const char *buf, size_t count) |
1453 | { | |
1454 | int pkey; | |
1455 | int ret; | |
1456 | ||
1457 | if (sscanf(buf, "%i", &pkey) != 1) | |
1458 | return -EINVAL; | |
1459 | ||
3d790a4c | 1460 | if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000) |
1da177e4 LT |
1461 | return -EINVAL; |
1462 | ||
4ce05937 RD |
1463 | /* |
1464 | * Set the full membership bit, so that we join the right | |
1465 | * broadcast group, etc. | |
1466 | */ | |
1467 | pkey |= 0x8000; | |
1468 | ||
43cb76d9 | 1469 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1470 | |
1471 | return ret ? ret : count; | |
1472 | } | |
7a52b34b | 1473 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 1474 | |
43cb76d9 GKH |
1475 | static ssize_t delete_child(struct device *dev, |
1476 | struct device_attribute *attr, | |
1da177e4 LT |
1477 | const char *buf, size_t count) |
1478 | { | |
1479 | int pkey; | |
1480 | int ret; | |
1481 | ||
1482 | if (sscanf(buf, "%i", &pkey) != 1) | |
1483 | return -EINVAL; | |
1484 | ||
1485 | if (pkey < 0 || pkey > 0xffff) | |
1486 | return -EINVAL; | |
1487 | ||
43cb76d9 | 1488 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1489 | |
1490 | return ret ? ret : count; | |
1491 | ||
1492 | } | |
7a52b34b | 1493 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
1494 | |
1495 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1496 | { | |
43cb76d9 | 1497 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1498 | } |
1499 | ||
83bb63f6 OG |
1500 | int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) |
1501 | { | |
1502 | struct ib_device_attr *device_attr; | |
1503 | int result = -ENOMEM; | |
1504 | ||
1505 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
1506 | if (!device_attr) { | |
1507 | printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", | |
1508 | hca->name, sizeof *device_attr); | |
1509 | return result; | |
1510 | } | |
1511 | ||
1512 | result = ib_query_device(hca, device_attr); | |
1513 | if (result) { | |
1514 | printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", | |
1515 | hca->name, result); | |
1516 | kfree(device_attr); | |
1517 | return result; | |
1518 | } | |
1519 | priv->hca_caps = device_attr->device_cap_flags; | |
1520 | ||
1521 | kfree(device_attr); | |
1522 | ||
1523 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
3d96c74d MM |
1524 | priv->dev->hw_features = NETIF_F_SG | |
1525 | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; | |
83bb63f6 | 1526 | |
3d96c74d MM |
1527 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
1528 | priv->dev->hw_features |= NETIF_F_TSO; | |
8ae31e5b | 1529 | |
3d96c74d MM |
1530 | priv->dev->features |= priv->dev->hw_features; |
1531 | } | |
83bb63f6 OG |
1532 | |
1533 | return 0; | |
1534 | } | |
1535 | ||
1da177e4 LT |
1536 | static struct net_device *ipoib_add_port(const char *format, |
1537 | struct ib_device *hca, u8 port) | |
1538 | { | |
1539 | struct ipoib_dev_priv *priv; | |
bc7b3a36 | 1540 | struct ib_port_attr attr; |
1da177e4 LT |
1541 | int result = -ENOMEM; |
1542 | ||
1543 | priv = ipoib_intf_alloc(format); | |
1544 | if (!priv) | |
1545 | goto alloc_mem_failed; | |
1546 | ||
1547 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
c3aa9b18 | 1548 | priv->dev->dev_id = port - 1; |
1da177e4 | 1549 | |
bc7b3a36 SM |
1550 | if (!ib_query_port(hca, port, &attr)) |
1551 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); | |
1552 | else { | |
1553 | printk(KERN_WARNING "%s: ib_query_port %d failed\n", | |
1554 | hca->name, port); | |
1555 | goto device_init_failed; | |
1556 | } | |
1557 | ||
1558 | /* MTU will be reset when mcast join happens */ | |
1559 | priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1560 | priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; | |
1561 | ||
596b9b68 DM |
1562 | priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh); |
1563 | ||
1da177e4 LT |
1564 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
1565 | if (result) { | |
1566 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1567 | hca->name, port, result); | |
ca6de177 | 1568 | goto device_init_failed; |
1da177e4 LT |
1569 | } |
1570 | ||
83bb63f6 | 1571 | if (ipoib_set_dev_features(priv, hca)) |
6046136c | 1572 | goto device_init_failed; |
af40da89 | 1573 | |
4ce05937 RD |
1574 | /* |
1575 | * Set the full membership bit, so that we join the right | |
1576 | * broadcast group, etc. | |
1577 | */ | |
1578 | priv->pkey |= 0x8000; | |
1579 | ||
1da177e4 LT |
1580 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1581 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1582 | ||
1583 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1584 | if (result) { | |
1585 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1586 | hca->name, port, result); | |
ca6de177 | 1587 | goto device_init_failed; |
1da177e4 LT |
1588 | } else |
1589 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1590 | ||
1da177e4 LT |
1591 | result = ipoib_dev_init(priv->dev, hca, port); |
1592 | if (result < 0) { | |
1593 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1594 | hca->name, port, result); | |
1595 | goto device_init_failed; | |
1596 | } | |
1597 | ||
1598 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1599 | priv->ca, ipoib_event); | |
1600 | result = ib_register_event_handler(&priv->event_handler); | |
1601 | if (result < 0) { | |
1602 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1603 | "port %d (ret = %d)\n", | |
1604 | hca->name, port, result); | |
1605 | goto event_failed; | |
1606 | } | |
1607 | ||
1608 | result = register_netdev(priv->dev); | |
1609 | if (result) { | |
1610 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1611 | hca->name, port, result); | |
1612 | goto register_failed; | |
1613 | } | |
1614 | ||
1732b0ef | 1615 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1616 | |
839fcaba MT |
1617 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1618 | goto sysfs_failed; | |
1da177e4 LT |
1619 | if (ipoib_add_pkey_attr(priv->dev)) |
1620 | goto sysfs_failed; | |
335a64a5 OG |
1621 | if (ipoib_add_umcast_attr(priv->dev)) |
1622 | goto sysfs_failed; | |
43cb76d9 | 1623 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1624 | goto sysfs_failed; |
43cb76d9 | 1625 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1626 | goto sysfs_failed; |
1627 | ||
1628 | return priv->dev; | |
1629 | ||
1630 | sysfs_failed: | |
1732b0ef | 1631 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1632 | unregister_netdev(priv->dev); |
1633 | ||
1634 | register_failed: | |
1635 | ib_unregister_event_handler(&priv->event_handler); | |
b63b70d8 SP |
1636 | /* Stop GC if started before flush */ |
1637 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1638 | cancel_delayed_work(&priv->neigh_reap_task); | |
a77a57a1 | 1639 | flush_workqueue(ipoib_workqueue); |
1da177e4 LT |
1640 | |
1641 | event_failed: | |
1642 | ipoib_dev_cleanup(priv->dev); | |
1643 | ||
1644 | device_init_failed: | |
1645 | free_netdev(priv->dev); | |
1646 | ||
1647 | alloc_mem_failed: | |
1648 | return ERR_PTR(result); | |
1649 | } | |
1650 | ||
1651 | static void ipoib_add_one(struct ib_device *device) | |
1652 | { | |
1653 | struct list_head *dev_list; | |
1654 | struct net_device *dev; | |
1655 | struct ipoib_dev_priv *priv; | |
1656 | int s, e, p; | |
1657 | ||
07ebafba TT |
1658 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1659 | return; | |
1660 | ||
1da177e4 LT |
1661 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1662 | if (!dev_list) | |
1663 | return; | |
1664 | ||
1665 | INIT_LIST_HEAD(dev_list); | |
1666 | ||
07ebafba | 1667 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1668 | s = 0; |
1669 | e = 0; | |
1670 | } else { | |
1671 | s = 1; | |
1672 | e = device->phys_port_cnt; | |
1673 | } | |
1674 | ||
1675 | for (p = s; p <= e; ++p) { | |
7b4c8769 EC |
1676 | if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) |
1677 | continue; | |
1da177e4 LT |
1678 | dev = ipoib_add_port("ib%d", device, p); |
1679 | if (!IS_ERR(dev)) { | |
1680 | priv = netdev_priv(dev); | |
1681 | list_add_tail(&priv->list, dev_list); | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1686 | } | |
1687 | ||
1688 | static void ipoib_remove_one(struct ib_device *device) | |
1689 | { | |
1690 | struct ipoib_dev_priv *priv, *tmp; | |
1691 | struct list_head *dev_list; | |
1692 | ||
07ebafba TT |
1693 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1694 | return; | |
1695 | ||
1da177e4 | 1696 | dev_list = ib_get_client_data(device, &ipoib_client); |
5a2815f0 IG |
1697 | if (!dev_list) |
1698 | return; | |
1da177e4 LT |
1699 | |
1700 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1701 | ib_unregister_event_handler(&priv->event_handler); | |
a77a57a1 RD |
1702 | |
1703 | rtnl_lock(); | |
1704 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
1705 | rtnl_unlock(); | |
1706 | ||
b63b70d8 SP |
1707 | /* Stop GC */ |
1708 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1709 | cancel_delayed_work(&priv->neigh_reap_task); | |
a77a57a1 | 1710 | flush_workqueue(ipoib_workqueue); |
1da177e4 LT |
1711 | |
1712 | unregister_netdev(priv->dev); | |
1da177e4 LT |
1713 | free_netdev(priv->dev); |
1714 | } | |
06c56e44 MT |
1715 | |
1716 | kfree(dev_list); | |
1da177e4 LT |
1717 | } |
1718 | ||
1719 | static int __init ipoib_init_module(void) | |
1720 | { | |
1721 | int ret; | |
1722 | ||
0f485251 SM |
1723 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1724 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1725 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1726 | ||
1727 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1728 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
732eacc0 | 1729 | ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); |
68e995a2 PS |
1730 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
1731 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
1732 | #endif | |
0f485251 | 1733 | |
f89271da EC |
1734 | /* |
1735 | * When copying small received packets, we only copy from the | |
1736 | * linear data part of the SKB, so we rely on this condition. | |
1737 | */ | |
1738 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
1739 | ||
1da177e4 LT |
1740 | ret = ipoib_register_debugfs(); |
1741 | if (ret) | |
1742 | return ret; | |
1743 | ||
1744 | /* | |
1745 | * We create our own workqueue mainly because we want to be | |
1746 | * able to flush it when devices are being removed. We can't | |
1747 | * use schedule_work()/flush_scheduled_work() because both | |
1748 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1749 | * so flush_scheduled_work() can deadlock during device | |
1750 | * removal. | |
1751 | */ | |
1752 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1753 | if (!ipoib_workqueue) { | |
1754 | ret = -ENOMEM; | |
1755 | goto err_fs; | |
1756 | } | |
1757 | ||
c1a0b23b MT |
1758 | ib_sa_register_client(&ipoib_sa_client); |
1759 | ||
1da177e4 LT |
1760 | ret = ib_register_client(&ipoib_client); |
1761 | if (ret) | |
c1a0b23b | 1762 | goto err_sa; |
1da177e4 | 1763 | |
9baa0b03 OG |
1764 | ret = ipoib_netlink_init(); |
1765 | if (ret) | |
1766 | goto err_client; | |
1767 | ||
1da177e4 LT |
1768 | return 0; |
1769 | ||
9baa0b03 OG |
1770 | err_client: |
1771 | ib_unregister_client(&ipoib_client); | |
1772 | ||
c1a0b23b MT |
1773 | err_sa: |
1774 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1775 | destroy_workqueue(ipoib_workqueue); |
1776 | ||
9adec1a8 RD |
1777 | err_fs: |
1778 | ipoib_unregister_debugfs(); | |
1779 | ||
1da177e4 LT |
1780 | return ret; |
1781 | } | |
1782 | ||
1783 | static void __exit ipoib_cleanup_module(void) | |
1784 | { | |
9baa0b03 | 1785 | ipoib_netlink_fini(); |
1da177e4 | 1786 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1787 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1788 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1789 | destroy_workqueue(ipoib_workqueue); |
1790 | } | |
1791 | ||
1792 | module_init(ipoib_init_module); | |
1793 | module_exit(ipoib_cleanup_module); |