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 | 91 | static void ipoib_add_one(struct ib_device *device); |
7c1eb45a | 92 | static void ipoib_remove_one(struct ib_device *device, void *client_data); |
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 | |
efc82eee | 111 | if (ipoib_ib_dev_open(dev)) { |
dd57c930 AE |
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: | |
efc82eee | 142 | ipoib_ib_dev_stop(dev); |
b8a1b1ce RD |
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 | ||
efc82eee DL |
160 | ipoib_ib_dev_down(dev); |
161 | ipoib_ib_dev_stop(dev); | |
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)) | |
c4268778 | 193 | features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); |
3d96c74d MM |
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); | |
edcd2a74 | 235 | dev_set_mtu(dev, ipoib_cm_max_mtu(dev)); |
71d9c5f9 RD |
236 | rtnl_unlock(); |
237 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; | |
238 | ||
239 | ipoib_flush_paths(dev); | |
240 | rtnl_lock(); | |
241 | return 0; | |
242 | } | |
243 | ||
244 | if (!strcmp(buf, "datagram\n")) { | |
245 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
246 | netdev_update_features(dev); | |
247 | dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); | |
248 | rtnl_unlock(); | |
249 | ipoib_flush_paths(dev); | |
250 | rtnl_lock(); | |
251 | return 0; | |
252 | } | |
253 | ||
254 | return -EINVAL; | |
255 | } | |
256 | ||
37c22a77 | 257 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
258 | { |
259 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
260 | struct rb_node *n = priv->path_tree.rb_node; | |
261 | struct ipoib_path *path; | |
262 | int ret; | |
263 | ||
264 | while (n) { | |
265 | path = rb_entry(n, struct ipoib_path, rb_node); | |
266 | ||
37c22a77 | 267 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
268 | sizeof (union ib_gid)); |
269 | ||
270 | if (ret < 0) | |
271 | n = n->rb_left; | |
272 | else if (ret > 0) | |
273 | n = n->rb_right; | |
274 | else | |
275 | return path; | |
276 | } | |
277 | ||
278 | return NULL; | |
279 | } | |
280 | ||
281 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
282 | { | |
283 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
284 | struct rb_node **n = &priv->path_tree.rb_node; | |
285 | struct rb_node *pn = NULL; | |
286 | struct ipoib_path *tpath; | |
287 | int ret; | |
288 | ||
289 | while (*n) { | |
290 | pn = *n; | |
291 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
292 | ||
293 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
294 | sizeof (union ib_gid)); | |
295 | if (ret < 0) | |
296 | n = &pn->rb_left; | |
297 | else if (ret > 0) | |
298 | n = &pn->rb_right; | |
299 | else | |
300 | return -EEXIST; | |
301 | } | |
302 | ||
303 | rb_link_node(&path->rb_node, pn, n); | |
304 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
305 | ||
306 | list_add_tail(&path->list, &priv->path_list); | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
312 | { | |
1da177e4 | 313 | struct sk_buff *skb; |
1da177e4 LT |
314 | |
315 | while ((skb = __skb_dequeue(&path->queue))) | |
316 | dev_kfree_skb_irq(skb); | |
317 | ||
b63b70d8 | 318 | ipoib_dbg(netdev_priv(dev), "path_free\n"); |
1da177e4 | 319 | |
b63b70d8 SP |
320 | /* remove all neigh connected to this path */ |
321 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
1da177e4 LT |
322 | |
323 | if (path->ah) | |
324 | ipoib_put_ah(path->ah); | |
325 | ||
326 | kfree(path); | |
327 | } | |
328 | ||
1732b0ef RD |
329 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
330 | ||
331 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
332 | { | |
333 | struct ipoib_path_iter *iter; | |
334 | ||
335 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
336 | if (!iter) | |
337 | return NULL; | |
338 | ||
339 | iter->dev = dev; | |
340 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
341 | ||
342 | if (ipoib_path_iter_next(iter)) { | |
343 | kfree(iter); | |
344 | return NULL; | |
345 | } | |
346 | ||
347 | return iter; | |
348 | } | |
349 | ||
350 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
351 | { | |
352 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
353 | struct rb_node *n; | |
354 | struct ipoib_path *path; | |
355 | int ret = 1; | |
356 | ||
357 | spin_lock_irq(&priv->lock); | |
358 | ||
359 | n = rb_first(&priv->path_tree); | |
360 | ||
361 | while (n) { | |
362 | path = rb_entry(n, struct ipoib_path, rb_node); | |
363 | ||
364 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
365 | sizeof (union ib_gid)) < 0) { | |
366 | iter->path = *path; | |
367 | ret = 0; | |
368 | break; | |
369 | } | |
370 | ||
371 | n = rb_next(n); | |
372 | } | |
373 | ||
374 | spin_unlock_irq(&priv->lock); | |
375 | ||
376 | return ret; | |
377 | } | |
378 | ||
379 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
380 | struct ipoib_path *path) | |
381 | { | |
382 | *path = iter->path; | |
383 | } | |
384 | ||
385 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
386 | ||
ee1e2c82 MS |
387 | void ipoib_mark_paths_invalid(struct net_device *dev) |
388 | { | |
389 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
390 | struct ipoib_path *path, *tp; | |
391 | ||
392 | spin_lock_irq(&priv->lock); | |
393 | ||
394 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
5b095d98 | 395 | ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", |
ee1e2c82 | 396 | be16_to_cpu(path->pathrec.dlid), |
fcace2fe | 397 | path->pathrec.dgid.raw); |
ee1e2c82 MS |
398 | path->valid = 0; |
399 | } | |
400 | ||
401 | spin_unlock_irq(&priv->lock); | |
402 | } | |
403 | ||
1da177e4 LT |
404 | void ipoib_flush_paths(struct net_device *dev) |
405 | { | |
406 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
407 | struct ipoib_path *path, *tp; | |
408 | LIST_HEAD(remove_list); | |
943c246e | 409 | unsigned long flags; |
1da177e4 | 410 | |
943c246e RD |
411 | netif_tx_lock_bh(dev); |
412 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 413 | |
157de229 | 414 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
415 | |
416 | list_for_each_entry(path, &remove_list, list) | |
417 | rb_erase(&path->rb_node, &priv->path_tree); | |
418 | ||
1da177e4 LT |
419 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
420 | if (path->query) | |
421 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
422 | spin_unlock_irqrestore(&priv->lock, flags); |
423 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
424 | wait_for_completion(&path->done); |
425 | path_free(dev, path); | |
943c246e RD |
426 | netif_tx_lock_bh(dev); |
427 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 428 | } |
943c246e RD |
429 | |
430 | spin_unlock_irqrestore(&priv->lock, flags); | |
431 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
432 | } |
433 | ||
434 | static void path_rec_completion(int status, | |
435 | struct ib_sa_path_rec *pathrec, | |
436 | void *path_ptr) | |
437 | { | |
438 | struct ipoib_path *path = path_ptr; | |
439 | struct net_device *dev = path->dev; | |
440 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
441 | struct ipoib_ah *ah = NULL; | |
c9da4bad | 442 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 443 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
444 | struct sk_buff_head skqueue; |
445 | struct sk_buff *skb; | |
446 | unsigned long flags; | |
447 | ||
843613b0 | 448 | if (!status) |
5b095d98 | 449 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
fcace2fe | 450 | be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); |
1da177e4 | 451 | else |
5b095d98 | 452 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 453 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
454 | |
455 | skb_queue_head_init(&skqueue); | |
456 | ||
457 | if (!status) { | |
46f1b3d7 SH |
458 | struct ib_ah_attr av; |
459 | ||
460 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
461 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
462 | } |
463 | ||
464 | spin_lock_irqsave(&priv->lock, flags); | |
465 | ||
3874397c | 466 | if (!IS_ERR_OR_NULL(ah)) { |
1da177e4 LT |
467 | path->pathrec = *pathrec; |
468 | ||
c9da4bad RD |
469 | old_ah = path->ah; |
470 | path->ah = ah; | |
471 | ||
1da177e4 LT |
472 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
473 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
474 | ||
475 | while ((skb = __skb_dequeue(&path->queue))) | |
476 | __skb_queue_tail(&skqueue, skb); | |
477 | ||
d04d01b1 | 478 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
479 | if (neigh->ah) { |
480 | WARN_ON(neigh->ah != old_ah); | |
481 | /* | |
482 | * Dropping the ah reference inside | |
483 | * priv->lock is safe here, because we | |
484 | * will hold one more reference from | |
485 | * the original value of path->ah (ie | |
486 | * old_ah). | |
487 | */ | |
488 | ipoib_put_ah(neigh->ah); | |
489 | } | |
1da177e4 LT |
490 | kref_get(&path->ah->ref); |
491 | neigh->ah = path->ah; | |
492 | ||
b63b70d8 | 493 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
494 | if (!ipoib_cm_get(neigh)) |
495 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
496 | path, | |
497 | neigh)); | |
498 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 499 | ipoib_neigh_free(neigh); |
839fcaba MT |
500 | continue; |
501 | } | |
502 | } | |
503 | ||
1da177e4 LT |
504 | while ((skb = __skb_dequeue(&neigh->queue))) |
505 | __skb_queue_tail(&skqueue, skb); | |
506 | } | |
ee1e2c82 | 507 | path->valid = 1; |
5872a9fc | 508 | } |
1da177e4 | 509 | |
5872a9fc | 510 | path->query = NULL; |
1da177e4 LT |
511 | complete(&path->done); |
512 | ||
513 | spin_unlock_irqrestore(&priv->lock, flags); | |
514 | ||
f72dd566 RD |
515 | if (IS_ERR_OR_NULL(ah)) |
516 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
517 | ||
ee1e2c82 MS |
518 | if (old_ah) |
519 | ipoib_put_ah(old_ah); | |
520 | ||
1da177e4 LT |
521 | while ((skb = __skb_dequeue(&skqueue))) { |
522 | skb->dev = dev; | |
523 | if (dev_queue_xmit(skb)) | |
524 | ipoib_warn(priv, "dev_queue_xmit failed " | |
525 | "to requeue packet\n"); | |
526 | } | |
527 | } | |
528 | ||
37c22a77 | 529 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
530 | { |
531 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
532 | struct ipoib_path *path; | |
533 | ||
1401b53a JM |
534 | if (!priv->broadcast) |
535 | return NULL; | |
536 | ||
21a38489 | 537 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
538 | if (!path) |
539 | return NULL; | |
540 | ||
21a38489 | 541 | path->dev = dev; |
1da177e4 LT |
542 | |
543 | skb_queue_head_init(&path->queue); | |
544 | ||
545 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 546 | |
37c22a77 | 547 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
2337f809 RD |
548 | path->pathrec.sgid = priv->local_gid; |
549 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
81668838 SH |
550 | path->pathrec.numb_path = 1; |
551 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
552 | |
553 | return path; | |
554 | } | |
555 | ||
556 | static int path_rec_start(struct net_device *dev, | |
557 | struct ipoib_path *path) | |
558 | { | |
559 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
560 | ||
5b095d98 | 561 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 562 | path->pathrec.dgid.raw); |
1da177e4 | 563 | |
65c7edda RD |
564 | init_completion(&path->done); |
565 | ||
1da177e4 | 566 | path->query_id = |
c1a0b23b | 567 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
568 | &path->pathrec, |
569 | IB_SA_PATH_REC_DGID | | |
570 | IB_SA_PATH_REC_SGID | | |
571 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 572 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
573 | IB_SA_PATH_REC_PKEY, |
574 | 1000, GFP_ATOMIC, | |
575 | path_rec_completion, | |
576 | path, &path->query); | |
577 | if (path->query_id < 0) { | |
01b3fc8b | 578 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 579 | path->query = NULL; |
93a3ab93 | 580 | complete(&path->done); |
1da177e4 LT |
581 | return path->query_id; |
582 | } | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
b63b70d8 SP |
587 | static void neigh_add_path(struct sk_buff *skb, u8 *daddr, |
588 | struct net_device *dev) | |
1da177e4 LT |
589 | { |
590 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
591 | struct ipoib_path *path; | |
592 | struct ipoib_neigh *neigh; | |
943c246e | 593 | unsigned long flags; |
1da177e4 | 594 | |
b5120a6e | 595 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 | 596 | neigh = ipoib_neigh_alloc(daddr, dev); |
1da177e4 | 597 | if (!neigh) { |
b5120a6e | 598 | spin_unlock_irqrestore(&priv->lock, flags); |
de903512 | 599 | ++dev->stats.tx_dropped; |
1da177e4 LT |
600 | dev_kfree_skb_any(skb); |
601 | return; | |
602 | } | |
603 | ||
b63b70d8 | 604 | path = __path_find(dev, daddr + 4); |
1da177e4 | 605 | if (!path) { |
b63b70d8 | 606 | path = path_rec_create(dev, daddr + 4); |
1da177e4 | 607 | if (!path) |
d2e0655e | 608 | goto err_path; |
1da177e4 LT |
609 | |
610 | __path_add(dev, path); | |
611 | } | |
612 | ||
613 | list_add_tail(&neigh->list, &path->neigh_list); | |
614 | ||
47f7a071 | 615 | if (path->ah) { |
1da177e4 LT |
616 | kref_get(&path->ah->ref); |
617 | neigh->ah = path->ah; | |
618 | ||
b63b70d8 | 619 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
620 | if (!ipoib_cm_get(neigh)) |
621 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
622 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 623 | ipoib_neigh_free(neigh); |
839fcaba MT |
624 | goto err_drop; |
625 | } | |
626 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
627 | __skb_queue_tail(&neigh->queue, skb); | |
628 | else { | |
629 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
630 | skb_queue_len(&neigh->queue)); | |
631 | goto err_drop; | |
632 | } | |
721d67cd RD |
633 | } else { |
634 | spin_unlock_irqrestore(&priv->lock, flags); | |
b63b70d8 SP |
635 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(daddr)); |
636 | ipoib_neigh_put(neigh); | |
721d67cd RD |
637 | return; |
638 | } | |
1da177e4 LT |
639 | } else { |
640 | neigh->ah = NULL; | |
1da177e4 LT |
641 | |
642 | if (!path->query && path_rec_start(dev, path)) | |
49b8e744 | 643 | goto err_path; |
1e85b806 ES |
644 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) |
645 | __skb_queue_tail(&neigh->queue, skb); | |
646 | else | |
647 | goto err_drop; | |
1da177e4 LT |
648 | } |
649 | ||
943c246e | 650 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 651 | ipoib_neigh_put(neigh); |
1da177e4 LT |
652 | return; |
653 | ||
d2e0655e | 654 | err_path: |
b63b70d8 | 655 | ipoib_neigh_free(neigh); |
839fcaba | 656 | err_drop: |
de903512 | 657 | ++dev->stats.tx_dropped; |
1da177e4 LT |
658 | dev_kfree_skb_any(skb); |
659 | ||
943c246e | 660 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 661 | ipoib_neigh_put(neigh); |
1da177e4 LT |
662 | } |
663 | ||
664 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
936d7de3 | 665 | struct ipoib_cb *cb) |
1da177e4 LT |
666 | { |
667 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
668 | struct ipoib_path *path; | |
943c246e | 669 | unsigned long flags; |
1da177e4 | 670 | |
943c246e | 671 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 672 | |
936d7de3 | 673 | path = __path_find(dev, cb->hwaddr + 4); |
ee1e2c82 | 674 | if (!path || !path->valid) { |
71d98b46 JM |
675 | int new_path = 0; |
676 | ||
677 | if (!path) { | |
936d7de3 | 678 | path = path_rec_create(dev, cb->hwaddr + 4); |
71d98b46 JM |
679 | new_path = 1; |
680 | } | |
1da177e4 | 681 | if (path) { |
1e85b806 ES |
682 | if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
683 | __skb_queue_tail(&path->queue, skb); | |
684 | } else { | |
685 | ++dev->stats.tx_dropped; | |
686 | dev_kfree_skb_any(skb); | |
687 | } | |
1da177e4 | 688 | |
ff79ae80 | 689 | if (!path->query && path_rec_start(dev, path)) { |
943c246e | 690 | spin_unlock_irqrestore(&priv->lock, flags); |
71d98b46 JM |
691 | if (new_path) |
692 | path_free(dev, path); | |
1da177e4 LT |
693 | return; |
694 | } else | |
695 | __path_add(dev, path); | |
696 | } else { | |
de903512 | 697 | ++dev->stats.tx_dropped; |
1da177e4 LT |
698 | dev_kfree_skb_any(skb); |
699 | } | |
700 | ||
943c246e | 701 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
702 | return; |
703 | } | |
704 | ||
47f7a071 | 705 | if (path->ah) { |
1da177e4 LT |
706 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
707 | be16_to_cpu(path->pathrec.dlid)); | |
708 | ||
721d67cd | 709 | spin_unlock_irqrestore(&priv->lock, flags); |
936d7de3 | 710 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(cb->hwaddr)); |
721d67cd | 711 | return; |
1da177e4 LT |
712 | } else if ((path->query || !path_rec_start(dev, path)) && |
713 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
1da177e4 LT |
714 | __skb_queue_tail(&path->queue, skb); |
715 | } else { | |
de903512 | 716 | ++dev->stats.tx_dropped; |
1da177e4 LT |
717 | dev_kfree_skb_any(skb); |
718 | } | |
719 | ||
943c246e | 720 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
721 | } |
722 | ||
723 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
724 | { | |
725 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
726 | struct ipoib_neigh *neigh; | |
b49fe362 | 727 | struct ipoib_cb *cb = ipoib_skb_cb(skb); |
b63b70d8 | 728 | struct ipoib_header *header; |
1da177e4 LT |
729 | unsigned long flags; |
730 | ||
b63b70d8 SP |
731 | header = (struct ipoib_header *) skb->data; |
732 | ||
733 | if (unlikely(cb->hwaddr[4] == 0xff)) { | |
734 | /* multicast, arrange "if" according to probability */ | |
735 | if ((header->proto != htons(ETH_P_IP)) && | |
736 | (header->proto != htons(ETH_P_IPV6)) && | |
737 | (header->proto != htons(ETH_P_ARP)) && | |
dc850b0e PM |
738 | (header->proto != htons(ETH_P_RARP)) && |
739 | (header->proto != htons(ETH_P_TIPC))) { | |
b63b70d8 | 740 | /* ethertype not supported by IPoIB */ |
17e6abee DM |
741 | ++dev->stats.tx_dropped; |
742 | dev_kfree_skb_any(skb); | |
b63b70d8 | 743 | return NETDEV_TX_OK; |
17e6abee | 744 | } |
b63b70d8 SP |
745 | /* Add in the P_Key for multicast*/ |
746 | cb->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
747 | cb->hwaddr[9] = priv->pkey & 0xff; | |
748 | ||
749 | neigh = ipoib_neigh_get(dev, cb->hwaddr); | |
750 | if (likely(neigh)) | |
751 | goto send_using_neigh; | |
752 | ipoib_mcast_send(dev, cb->hwaddr, skb); | |
753 | return NETDEV_TX_OK; | |
17e6abee | 754 | } |
1da177e4 | 755 | |
b63b70d8 SP |
756 | /* unicast, arrange "switch" according to probability */ |
757 | switch (header->proto) { | |
758 | case htons(ETH_P_IP): | |
759 | case htons(ETH_P_IPV6): | |
dc850b0e | 760 | case htons(ETH_P_TIPC): |
b63b70d8 SP |
761 | neigh = ipoib_neigh_get(dev, cb->hwaddr); |
762 | if (unlikely(!neigh)) { | |
763 | neigh_add_path(skb, cb->hwaddr, dev); | |
764 | return NETDEV_TX_OK; | |
a50df398 | 765 | } |
b63b70d8 SP |
766 | break; |
767 | case htons(ETH_P_ARP): | |
768 | case htons(ETH_P_RARP): | |
769 | /* for unicast ARP and RARP should always perform path find */ | |
770 | unicast_arp_send(skb, dev, cb); | |
771 | return NETDEV_TX_OK; | |
772 | default: | |
773 | /* ethertype not supported by IPoIB */ | |
774 | ++dev->stats.tx_dropped; | |
775 | dev_kfree_skb_any(skb); | |
776 | return NETDEV_TX_OK; | |
777 | } | |
8a7f7521 | 778 | |
b63b70d8 SP |
779 | send_using_neigh: |
780 | /* note we now hold a ref to neigh */ | |
781 | if (ipoib_cm_get(neigh)) { | |
782 | if (ipoib_cm_up(neigh)) { | |
783 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
784 | goto unref; | |
1da177e4 | 785 | } |
b63b70d8 SP |
786 | } else if (neigh->ah) { |
787 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(cb->hwaddr)); | |
788 | goto unref; | |
789 | } | |
1da177e4 | 790 | |
b63b70d8 SP |
791 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
792 | spin_lock_irqsave(&priv->lock, flags); | |
793 | __skb_queue_tail(&neigh->queue, skb); | |
794 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 795 | } else { |
b63b70d8 SP |
796 | ++dev->stats.tx_dropped; |
797 | dev_kfree_skb_any(skb); | |
798 | } | |
1da177e4 | 799 | |
b63b70d8 SP |
800 | unref: |
801 | ipoib_neigh_put(neigh); | |
1da177e4 | 802 | |
1da177e4 LT |
803 | return NETDEV_TX_OK; |
804 | } | |
805 | ||
1da177e4 LT |
806 | static void ipoib_timeout(struct net_device *dev) |
807 | { | |
808 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
809 | ||
4b2d319b RD |
810 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
811 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
812 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
813 | netif_queue_stopped(dev), | |
814 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
815 | /* XXX reset QP, etc. */ |
816 | } | |
817 | ||
818 | static int ipoib_hard_header(struct sk_buff *skb, | |
819 | struct net_device *dev, | |
820 | unsigned short type, | |
3b04ddde | 821 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
822 | { |
823 | struct ipoib_header *header; | |
b49fe362 | 824 | struct ipoib_cb *cb = ipoib_skb_cb(skb); |
1da177e4 LT |
825 | |
826 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
827 | ||
828 | header->proto = htons(type); | |
829 | header->reserved = 0; | |
830 | ||
831 | /* | |
b63b70d8 | 832 | * we don't rely on dst_entry structure, always stuff the |
936d7de3 RD |
833 | * destination address into skb->cb so we can figure out where |
834 | * to send the packet later. | |
1da177e4 | 835 | */ |
b63b70d8 | 836 | memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN); |
1da177e4 | 837 | |
83bdd3b9 | 838 | return sizeof *header; |
1da177e4 LT |
839 | } |
840 | ||
841 | static void ipoib_set_mcast_list(struct net_device *dev) | |
842 | { | |
843 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
844 | ||
7a343d4c LA |
845 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
846 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
847 | return; | |
848 | } | |
849 | ||
0b39578b | 850 | queue_work(priv->wq, &priv->restart_task); |
1da177e4 LT |
851 | } |
852 | ||
5aa7add8 ND |
853 | static int ipoib_get_iflink(const struct net_device *dev) |
854 | { | |
855 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
856 | ||
2c153959 ES |
857 | /* parent interface */ |
858 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
859 | return dev->ifindex; | |
860 | ||
861 | /* child/vlan interface */ | |
5aa7add8 ND |
862 | return priv->parent->ifindex; |
863 | } | |
864 | ||
b63b70d8 | 865 | static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) |
1da177e4 | 866 | { |
b63b70d8 SP |
867 | /* |
868 | * Use only the address parts that contributes to spreading | |
869 | * The subnet prefix is not used as one can not connect to | |
870 | * same remote port (GUID) using the same remote QPN via two | |
871 | * different subnets. | |
872 | */ | |
873 | /* qpn octets[1:4) & port GUID octets[12:20) */ | |
9d1ad66e | 874 | u32 *d32 = (u32 *) daddr; |
b63b70d8 SP |
875 | u32 hv; |
876 | ||
9d1ad66e | 877 | hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0); |
b63b70d8 SP |
878 | return hv & htbl->mask; |
879 | } | |
880 | ||
881 | struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr) | |
882 | { | |
883 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
884 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
885 | struct ipoib_neigh_hash *htbl; | |
886 | struct ipoib_neigh *neigh = NULL; | |
887 | u32 hash_val; | |
888 | ||
889 | rcu_read_lock_bh(); | |
890 | ||
891 | htbl = rcu_dereference_bh(ntbl->htbl); | |
892 | ||
893 | if (!htbl) | |
894 | goto out_unlock; | |
895 | ||
896 | hash_val = ipoib_addr_hash(htbl, daddr); | |
897 | for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]); | |
898 | neigh != NULL; | |
899 | neigh = rcu_dereference_bh(neigh->hnext)) { | |
900 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { | |
901 | /* found, take one ref on behalf of the caller */ | |
902 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
903 | /* deleted */ | |
904 | neigh = NULL; | |
905 | goto out_unlock; | |
906 | } | |
907 | neigh->alive = jiffies; | |
908 | goto out_unlock; | |
909 | } | |
910 | } | |
911 | ||
912 | out_unlock: | |
913 | rcu_read_unlock_bh(); | |
914 | return neigh; | |
915 | } | |
916 | ||
917 | static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv) | |
918 | { | |
919 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
920 | struct ipoib_neigh_hash *htbl; | |
921 | unsigned long neigh_obsolete; | |
922 | unsigned long dt; | |
1da177e4 | 923 | unsigned long flags; |
b63b70d8 | 924 | int i; |
1da177e4 | 925 | |
b63b70d8 | 926 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) |
732a2170 | 927 | return; |
1da177e4 | 928 | |
b5120a6e | 929 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
930 | |
931 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 932 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
933 | |
934 | if (!htbl) | |
935 | goto out_unlock; | |
936 | ||
937 | /* neigh is obsolete if it was idle for two GC periods */ | |
938 | dt = 2 * arp_tbl.gc_interval; | |
939 | neigh_obsolete = jiffies - dt; | |
940 | /* handle possible race condition */ | |
941 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
942 | goto out_unlock; | |
943 | ||
944 | for (i = 0; i < htbl->size; i++) { | |
945 | struct ipoib_neigh *neigh; | |
946 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
947 | ||
948 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 949 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
950 | /* was the neigh idle for two GC periods */ |
951 | if (time_after(neigh_obsolete, neigh->alive)) { | |
952 | rcu_assign_pointer(*np, | |
953 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 954 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 955 | /* remove from path/mc list */ |
b63b70d8 | 956 | list_del(&neigh->list); |
b63b70d8 SP |
957 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
958 | } else { | |
959 | np = &neigh->hnext; | |
960 | } | |
1da177e4 | 961 | |
b63b70d8 SP |
962 | } |
963 | } | |
1da177e4 | 964 | |
b63b70d8 | 965 | out_unlock: |
b5120a6e | 966 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 967 | } |
1da177e4 | 968 | |
b63b70d8 SP |
969 | static void ipoib_reap_neigh(struct work_struct *work) |
970 | { | |
971 | struct ipoib_dev_priv *priv = | |
972 | container_of(work, struct ipoib_dev_priv, neigh_reap_task.work); | |
973 | ||
974 | __ipoib_reap_neigh(priv); | |
975 | ||
976 | if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
0b39578b | 977 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
b63b70d8 | 978 | arp_tbl.gc_interval); |
1da177e4 LT |
979 | } |
980 | ||
b63b70d8 SP |
981 | |
982 | static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr, | |
732a2170 | 983 | struct net_device *dev) |
d2e0655e MT |
984 | { |
985 | struct ipoib_neigh *neigh; | |
986 | ||
b63b70d8 | 987 | neigh = kzalloc(sizeof *neigh, GFP_ATOMIC); |
d2e0655e MT |
988 | if (!neigh) |
989 | return NULL; | |
990 | ||
732a2170 | 991 | neigh->dev = dev; |
b63b70d8 | 992 | memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr)); |
82b39913 | 993 | skb_queue_head_init(&neigh->queue); |
b63b70d8 | 994 | INIT_LIST_HEAD(&neigh->list); |
839fcaba | 995 | ipoib_cm_set(neigh, NULL); |
b63b70d8 SP |
996 | /* one ref on behalf of the caller */ |
997 | atomic_set(&neigh->refcnt, 1); | |
998 | ||
999 | return neigh; | |
1000 | } | |
1001 | ||
1002 | struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr, | |
1003 | struct net_device *dev) | |
1004 | { | |
1005 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1006 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1007 | struct ipoib_neigh_hash *htbl; | |
1008 | struct ipoib_neigh *neigh; | |
1009 | u32 hash_val; | |
1010 | ||
b63b70d8 | 1011 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1012 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1013 | if (!htbl) { |
1014 | neigh = NULL; | |
1015 | goto out_unlock; | |
1016 | } | |
1017 | ||
1018 | /* need to add a new neigh, but maybe some other thread succeeded? | |
1019 | * recalc hash, maybe hash resize took place so we do a search | |
1020 | */ | |
1021 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1022 | for (neigh = rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1023 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1024 | neigh != NULL; |
1025 | neigh = rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1026 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1027 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { |
1028 | /* found, take one ref on behalf of the caller */ | |
1029 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1030 | /* deleted */ | |
1031 | neigh = NULL; | |
1032 | break; | |
1033 | } | |
1034 | neigh->alive = jiffies; | |
1035 | goto out_unlock; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | neigh = ipoib_neigh_ctor(daddr, dev); | |
1040 | if (!neigh) | |
1041 | goto out_unlock; | |
1042 | ||
1043 | /* one ref on behalf of the hash table */ | |
1044 | atomic_inc(&neigh->refcnt); | |
1045 | neigh->alive = jiffies; | |
1046 | /* put in hash */ | |
1047 | rcu_assign_pointer(neigh->hnext, | |
1048 | rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1049 | lockdep_is_held(&priv->lock))); |
b63b70d8 SP |
1050 | rcu_assign_pointer(htbl->buckets[hash_val], neigh); |
1051 | atomic_inc(&ntbl->entries); | |
1052 | ||
1053 | out_unlock: | |
d2e0655e MT |
1054 | |
1055 | return neigh; | |
1056 | } | |
1057 | ||
b63b70d8 | 1058 | void ipoib_neigh_dtor(struct ipoib_neigh *neigh) |
d2e0655e | 1059 | { |
b63b70d8 SP |
1060 | /* neigh reference count was dropprd to zero */ |
1061 | struct net_device *dev = neigh->dev; | |
1062 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2745b5b7 | 1063 | struct sk_buff *skb; |
b63b70d8 SP |
1064 | if (neigh->ah) |
1065 | ipoib_put_ah(neigh->ah); | |
2745b5b7 | 1066 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 1067 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
1068 | dev_kfree_skb_any(skb); |
1069 | } | |
839fcaba MT |
1070 | if (ipoib_cm_get(neigh)) |
1071 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
b63b70d8 SP |
1072 | ipoib_dbg(netdev_priv(dev), |
1073 | "neigh free for %06x %pI6\n", | |
1074 | IPOIB_QPN(neigh->daddr), | |
1075 | neigh->daddr + 4); | |
d2e0655e | 1076 | kfree(neigh); |
b63b70d8 SP |
1077 | if (atomic_dec_and_test(&priv->ntbl.entries)) { |
1078 | if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags)) | |
1079 | complete(&priv->ntbl.flushed); | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | static void ipoib_neigh_reclaim(struct rcu_head *rp) | |
1084 | { | |
1085 | /* Called as a result of removal from hash table */ | |
1086 | struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu); | |
1087 | /* note TX context may hold another ref */ | |
1088 | ipoib_neigh_put(neigh); | |
d2e0655e MT |
1089 | } |
1090 | ||
b63b70d8 | 1091 | void ipoib_neigh_free(struct ipoib_neigh *neigh) |
1da177e4 | 1092 | { |
b63b70d8 SP |
1093 | struct net_device *dev = neigh->dev; |
1094 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1095 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1096 | struct ipoib_neigh_hash *htbl; | |
1097 | struct ipoib_neigh __rcu **np; | |
1098 | struct ipoib_neigh *n; | |
1099 | u32 hash_val; | |
1100 | ||
b63b70d8 | 1101 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1102 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1103 | if (!htbl) |
b5120a6e | 1104 | return; |
b63b70d8 SP |
1105 | |
1106 | hash_val = ipoib_addr_hash(htbl, neigh->daddr); | |
1107 | np = &htbl->buckets[hash_val]; | |
1108 | for (n = rcu_dereference_protected(*np, | |
b5120a6e | 1109 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1110 | n != NULL; |
6c723a68 | 1111 | n = rcu_dereference_protected(*np, |
b5120a6e | 1112 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1113 | if (n == neigh) { |
1114 | /* found */ | |
1115 | rcu_assign_pointer(*np, | |
1116 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1117 | lockdep_is_held(&priv->lock))); |
49b8e744 JF |
1118 | /* remove from parent list */ |
1119 | list_del(&neigh->list); | |
b63b70d8 | 1120 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
b5120a6e | 1121 | return; |
b63b70d8 SP |
1122 | } else { |
1123 | np = &n->hnext; | |
1124 | } | |
1125 | } | |
b63b70d8 SP |
1126 | } |
1127 | ||
1128 | static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) | |
1129 | { | |
1130 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1131 | struct ipoib_neigh_hash *htbl; | |
52374967 | 1132 | struct ipoib_neigh __rcu **buckets; |
b63b70d8 SP |
1133 | u32 size; |
1134 | ||
1135 | clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); | |
1136 | ntbl->htbl = NULL; | |
b63b70d8 SP |
1137 | htbl = kzalloc(sizeof(*htbl), GFP_KERNEL); |
1138 | if (!htbl) | |
1139 | return -ENOMEM; | |
1140 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1141 | size = roundup_pow_of_two(arp_tbl.gc_thresh3); | |
1142 | buckets = kzalloc(size * sizeof(*buckets), GFP_KERNEL); | |
1143 | if (!buckets) { | |
1144 | kfree(htbl); | |
1145 | return -ENOMEM; | |
1146 | } | |
1147 | htbl->size = size; | |
1148 | htbl->mask = (size - 1); | |
1149 | htbl->buckets = buckets; | |
52374967 | 1150 | RCU_INIT_POINTER(ntbl->htbl, htbl); |
66172c09 | 1151 | htbl->ntbl = ntbl; |
b63b70d8 SP |
1152 | atomic_set(&ntbl->entries, 0); |
1153 | ||
1154 | /* start garbage collection */ | |
1155 | clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
0b39578b | 1156 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
b63b70d8 | 1157 | arp_tbl.gc_interval); |
1da177e4 LT |
1158 | |
1159 | return 0; | |
1160 | } | |
1161 | ||
b63b70d8 SP |
1162 | static void neigh_hash_free_rcu(struct rcu_head *head) |
1163 | { | |
1164 | struct ipoib_neigh_hash *htbl = container_of(head, | |
1165 | struct ipoib_neigh_hash, | |
1166 | rcu); | |
1167 | struct ipoib_neigh __rcu **buckets = htbl->buckets; | |
66172c09 | 1168 | struct ipoib_neigh_table *ntbl = htbl->ntbl; |
b63b70d8 SP |
1169 | |
1170 | kfree(buckets); | |
1171 | kfree(htbl); | |
66172c09 | 1172 | complete(&ntbl->deleted); |
b63b70d8 SP |
1173 | } |
1174 | ||
1175 | void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid) | |
1176 | { | |
1177 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1178 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1179 | struct ipoib_neigh_hash *htbl; | |
1180 | unsigned long flags; | |
1181 | int i; | |
1182 | ||
1183 | /* remove all neigh connected to a given path or mcast */ | |
b5120a6e | 1184 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1185 | |
1186 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1187 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1188 | |
1189 | if (!htbl) | |
1190 | goto out_unlock; | |
1191 | ||
1192 | for (i = 0; i < htbl->size; i++) { | |
1193 | struct ipoib_neigh *neigh; | |
1194 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1195 | ||
1196 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1197 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1198 | /* delete neighs belong to this parent */ |
1199 | if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) { | |
1200 | rcu_assign_pointer(*np, | |
1201 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1202 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1203 | /* remove from parent list */ |
b63b70d8 | 1204 | list_del(&neigh->list); |
b63b70d8 SP |
1205 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1206 | } else { | |
1207 | np = &neigh->hnext; | |
1208 | } | |
1209 | ||
1210 | } | |
1211 | } | |
1212 | out_unlock: | |
b5120a6e | 1213 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 SP |
1214 | } |
1215 | ||
1216 | static void ipoib_flush_neighs(struct ipoib_dev_priv *priv) | |
1217 | { | |
1218 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1219 | struct ipoib_neigh_hash *htbl; | |
1220 | unsigned long flags; | |
66172c09 | 1221 | int i, wait_flushed = 0; |
b63b70d8 | 1222 | |
66172c09 | 1223 | init_completion(&priv->ntbl.flushed); |
b63b70d8 | 1224 | |
b5120a6e | 1225 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1226 | |
1227 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1228 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1229 | if (!htbl) |
1230 | goto out_unlock; | |
1231 | ||
66172c09 SP |
1232 | wait_flushed = atomic_read(&priv->ntbl.entries); |
1233 | if (!wait_flushed) | |
1234 | goto free_htbl; | |
1235 | ||
b63b70d8 SP |
1236 | for (i = 0; i < htbl->size; i++) { |
1237 | struct ipoib_neigh *neigh; | |
1238 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1239 | ||
1240 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1241 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1242 | rcu_assign_pointer(*np, |
1243 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1244 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1245 | /* remove from path/mc list */ |
b63b70d8 | 1246 | list_del(&neigh->list); |
b63b70d8 SP |
1247 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1248 | } | |
1249 | } | |
1250 | ||
66172c09 | 1251 | free_htbl: |
b63b70d8 SP |
1252 | rcu_assign_pointer(ntbl->htbl, NULL); |
1253 | call_rcu(&htbl->rcu, neigh_hash_free_rcu); | |
1254 | ||
1255 | out_unlock: | |
b5120a6e | 1256 | spin_unlock_irqrestore(&priv->lock, flags); |
66172c09 SP |
1257 | if (wait_flushed) |
1258 | wait_for_completion(&priv->ntbl.flushed); | |
b63b70d8 SP |
1259 | } |
1260 | ||
1261 | static void ipoib_neigh_hash_uninit(struct net_device *dev) | |
1262 | { | |
1263 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1264 | int stopped; | |
1265 | ||
1266 | ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n"); | |
66172c09 | 1267 | init_completion(&priv->ntbl.deleted); |
b63b70d8 SP |
1268 | set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); |
1269 | ||
1270 | /* Stop GC if called at init fail need to cancel work */ | |
1271 | stopped = test_and_set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1272 | if (!stopped) | |
1273 | cancel_delayed_work(&priv->neigh_reap_task); | |
1274 | ||
66172c09 SP |
1275 | ipoib_flush_neighs(priv); |
1276 | ||
1277 | wait_for_completion(&priv->ntbl.deleted); | |
b63b70d8 SP |
1278 | } |
1279 | ||
1280 | ||
1da177e4 LT |
1281 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
1282 | { | |
1283 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1284 | ||
1285 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 1286 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
1287 | GFP_KERNEL); |
1288 | if (!priv->rx_ring) { | |
1289 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 1290 | ca->name, ipoib_recvq_size); |
be7aa663 | 1291 | goto out; |
1da177e4 | 1292 | } |
1da177e4 | 1293 | |
948579cd | 1294 | priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 LT |
1295 | if (!priv->tx_ring) { |
1296 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 1297 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
1298 | goto out_rx_ring_cleanup; |
1299 | } | |
1da177e4 | 1300 | |
1b524963 | 1301 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
1302 | |
1303 | if (ipoib_ib_dev_init(dev, ca, port)) | |
1304 | goto out_tx_ring_cleanup; | |
1305 | ||
be7aa663 DL |
1306 | /* |
1307 | * Must be after ipoib_ib_dev_init so we can allocate a per | |
1308 | * device wq there and use it here | |
1309 | */ | |
1310 | if (ipoib_neigh_hash_init(priv) < 0) | |
1311 | goto out_dev_uninit; | |
1312 | ||
1da177e4 LT |
1313 | return 0; |
1314 | ||
be7aa663 DL |
1315 | out_dev_uninit: |
1316 | ipoib_ib_dev_cleanup(dev); | |
1317 | ||
1da177e4 | 1318 | out_tx_ring_cleanup: |
10313cbb | 1319 | vfree(priv->tx_ring); |
1da177e4 LT |
1320 | |
1321 | out_rx_ring_cleanup: | |
1322 | kfree(priv->rx_ring); | |
1323 | ||
1324 | out: | |
1325 | return -ENOMEM; | |
1326 | } | |
1327 | ||
1328 | void ipoib_dev_cleanup(struct net_device *dev) | |
1329 | { | |
1330 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
9baa0b03 OG |
1331 | LIST_HEAD(head); |
1332 | ||
1333 | ASSERT_RTNL(); | |
1da177e4 | 1334 | |
1732b0ef | 1335 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
1336 | |
1337 | /* Delete any child interfaces first */ | |
1338 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
b63b70d8 SP |
1339 | /* Stop GC on child */ |
1340 | set_bit(IPOIB_STOP_NEIGH_GC, &cpriv->flags); | |
1341 | cancel_delayed_work(&cpriv->neigh_reap_task); | |
9baa0b03 | 1342 | unregister_netdevice_queue(cpriv->dev, &head); |
1da177e4 | 1343 | } |
9baa0b03 | 1344 | unregister_netdevice_many(&head); |
1da177e4 | 1345 | |
be7aa663 DL |
1346 | /* |
1347 | * Must be before ipoib_ib_dev_cleanup or we delete an in use | |
1348 | * work queue | |
1349 | */ | |
1350 | ipoib_neigh_hash_uninit(dev); | |
1351 | ||
1da177e4 LT |
1352 | ipoib_ib_dev_cleanup(dev); |
1353 | ||
92a6b34b | 1354 | kfree(priv->rx_ring); |
10313cbb | 1355 | vfree(priv->tx_ring); |
1da177e4 | 1356 | |
92a6b34b HR |
1357 | priv->rx_ring = NULL; |
1358 | priv->tx_ring = NULL; | |
1da177e4 LT |
1359 | } |
1360 | ||
3b04ddde SH |
1361 | static const struct header_ops ipoib_header_ops = { |
1362 | .create = ipoib_hard_header, | |
1363 | }; | |
1364 | ||
fe8114e8 | 1365 | static const struct net_device_ops ipoib_netdev_ops = { |
9baa0b03 | 1366 | .ndo_uninit = ipoib_uninit, |
fe8114e8 SH |
1367 | .ndo_open = ipoib_open, |
1368 | .ndo_stop = ipoib_stop, | |
1369 | .ndo_change_mtu = ipoib_change_mtu, | |
3d96c74d | 1370 | .ndo_fix_features = ipoib_fix_features, |
fe8114e8 SH |
1371 | .ndo_start_xmit = ipoib_start_xmit, |
1372 | .ndo_tx_timeout = ipoib_timeout, | |
afc4b13d | 1373 | .ndo_set_rx_mode = ipoib_set_mcast_list, |
5aa7add8 | 1374 | .ndo_get_iflink = ipoib_get_iflink, |
fe8114e8 SH |
1375 | }; |
1376 | ||
9baa0b03 | 1377 | void ipoib_setup(struct net_device *dev) |
1da177e4 LT |
1378 | { |
1379 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1380 | ||
fe8114e8 | 1381 | dev->netdev_ops = &ipoib_netdev_ops; |
2337f809 | 1382 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 1383 | |
82c24c18 EC |
1384 | ipoib_set_ethtool_ops(dev); |
1385 | ||
7f1a3867 | 1386 | netif_napi_add(dev, &priv->napi, ipoib_poll, NAPI_POLL_WEIGHT); |
1da177e4 | 1387 | |
2337f809 | 1388 | dev->watchdog_timeo = HZ; |
1da177e4 | 1389 | |
2337f809 | 1390 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 | 1391 | |
936d7de3 | 1392 | dev->hard_header_len = IPOIB_ENCAP_LEN; |
2337f809 RD |
1393 | dev->addr_len = INFINIBAND_ALEN; |
1394 | dev->type = ARPHRD_INFINIBAND; | |
1395 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 1396 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 1397 | NETIF_F_HIGHDMA); |
02875878 | 1398 | netif_keep_dst(dev); |
1da177e4 | 1399 | |
1da177e4 LT |
1400 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
1401 | ||
1da177e4 LT |
1402 | priv->dev = dev; |
1403 | ||
1404 | spin_lock_init(&priv->lock); | |
1da177e4 | 1405 | |
f47944cc | 1406 | init_rwsem(&priv->vlan_rwsem); |
1da177e4 LT |
1407 | |
1408 | INIT_LIST_HEAD(&priv->path_list); | |
1409 | INIT_LIST_HEAD(&priv->child_intfs); | |
1410 | INIT_LIST_HEAD(&priv->dead_ahs); | |
1411 | INIT_LIST_HEAD(&priv->multicast_list); | |
1412 | ||
c4028958 | 1413 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 1414 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
1415 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
1416 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
1417 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
1418 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
1419 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
b63b70d8 | 1420 | INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh); |
1da177e4 LT |
1421 | } |
1422 | ||
1423 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1424 | { | |
1425 | struct net_device *dev; | |
1426 | ||
c835a677 TG |
1427 | dev = alloc_netdev((int)sizeof(struct ipoib_dev_priv), name, |
1428 | NET_NAME_UNKNOWN, ipoib_setup); | |
1da177e4 LT |
1429 | if (!dev) |
1430 | return NULL; | |
1431 | ||
1432 | return netdev_priv(dev); | |
1433 | } | |
1434 | ||
43cb76d9 GKH |
1435 | static ssize_t show_pkey(struct device *dev, |
1436 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1437 | { |
43cb76d9 | 1438 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1439 | |
1440 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1441 | } | |
43cb76d9 | 1442 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1443 | |
335a64a5 OG |
1444 | static ssize_t show_umcast(struct device *dev, |
1445 | struct device_attribute *attr, char *buf) | |
1446 | { | |
1447 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1448 | ||
1449 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1450 | } | |
1451 | ||
862096a8 | 1452 | void ipoib_set_umcast(struct net_device *ndev, int umcast_val) |
335a64a5 | 1453 | { |
862096a8 | 1454 | struct ipoib_dev_priv *priv = netdev_priv(ndev); |
335a64a5 OG |
1455 | |
1456 | if (umcast_val > 0) { | |
1457 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1458 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1459 | "by userspace\n"); | |
1460 | } else | |
1461 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
862096a8 OG |
1462 | } |
1463 | ||
1464 | static ssize_t set_umcast(struct device *dev, | |
1465 | struct device_attribute *attr, | |
1466 | const char *buf, size_t count) | |
1467 | { | |
1468 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1469 | ||
1470 | ipoib_set_umcast(to_net_dev(dev), umcast_val); | |
335a64a5 OG |
1471 | |
1472 | return count; | |
1473 | } | |
1474 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1475 | ||
1476 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1477 | { | |
1478 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1479 | } | |
1480 | ||
43cb76d9 GKH |
1481 | static ssize_t create_child(struct device *dev, |
1482 | struct device_attribute *attr, | |
1da177e4 LT |
1483 | const char *buf, size_t count) |
1484 | { | |
1485 | int pkey; | |
1486 | int ret; | |
1487 | ||
1488 | if (sscanf(buf, "%i", &pkey) != 1) | |
1489 | return -EINVAL; | |
1490 | ||
3d790a4c | 1491 | if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000) |
1da177e4 LT |
1492 | return -EINVAL; |
1493 | ||
4ce05937 RD |
1494 | /* |
1495 | * Set the full membership bit, so that we join the right | |
1496 | * broadcast group, etc. | |
1497 | */ | |
1498 | pkey |= 0x8000; | |
1499 | ||
43cb76d9 | 1500 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1501 | |
1502 | return ret ? ret : count; | |
1503 | } | |
7a52b34b | 1504 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 1505 | |
43cb76d9 GKH |
1506 | static ssize_t delete_child(struct device *dev, |
1507 | struct device_attribute *attr, | |
1da177e4 LT |
1508 | const char *buf, size_t count) |
1509 | { | |
1510 | int pkey; | |
1511 | int ret; | |
1512 | ||
1513 | if (sscanf(buf, "%i", &pkey) != 1) | |
1514 | return -EINVAL; | |
1515 | ||
1516 | if (pkey < 0 || pkey > 0xffff) | |
1517 | return -EINVAL; | |
1518 | ||
43cb76d9 | 1519 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1520 | |
1521 | return ret ? ret : count; | |
1522 | ||
1523 | } | |
7a52b34b | 1524 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
1525 | |
1526 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1527 | { | |
43cb76d9 | 1528 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1529 | } |
1530 | ||
83bb63f6 OG |
1531 | int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) |
1532 | { | |
1533 | struct ib_device_attr *device_attr; | |
1534 | int result = -ENOMEM; | |
1535 | ||
1536 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
1537 | if (!device_attr) { | |
1538 | printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", | |
1539 | hca->name, sizeof *device_attr); | |
1540 | return result; | |
1541 | } | |
1542 | ||
1543 | result = ib_query_device(hca, device_attr); | |
1544 | if (result) { | |
1545 | printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", | |
1546 | hca->name, result); | |
1547 | kfree(device_attr); | |
1548 | return result; | |
1549 | } | |
1550 | priv->hca_caps = device_attr->device_cap_flags; | |
1551 | ||
1552 | kfree(device_attr); | |
1553 | ||
1554 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
3d96c74d MM |
1555 | priv->dev->hw_features = NETIF_F_SG | |
1556 | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; | |
83bb63f6 | 1557 | |
3d96c74d MM |
1558 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
1559 | priv->dev->hw_features |= NETIF_F_TSO; | |
8ae31e5b | 1560 | |
3d96c74d MM |
1561 | priv->dev->features |= priv->dev->hw_features; |
1562 | } | |
83bb63f6 OG |
1563 | |
1564 | return 0; | |
1565 | } | |
1566 | ||
1da177e4 LT |
1567 | static struct net_device *ipoib_add_port(const char *format, |
1568 | struct ib_device *hca, u8 port) | |
1569 | { | |
1570 | struct ipoib_dev_priv *priv; | |
bc7b3a36 | 1571 | struct ib_port_attr attr; |
1da177e4 LT |
1572 | int result = -ENOMEM; |
1573 | ||
1574 | priv = ipoib_intf_alloc(format); | |
1575 | if (!priv) | |
1576 | goto alloc_mem_failed; | |
1577 | ||
1578 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
c3aa9b18 | 1579 | priv->dev->dev_id = port - 1; |
1da177e4 | 1580 | |
58e9cc90 AV |
1581 | result = ib_query_port(hca, port, &attr); |
1582 | if (!result) | |
bc7b3a36 SM |
1583 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); |
1584 | else { | |
1585 | printk(KERN_WARNING "%s: ib_query_port %d failed\n", | |
1586 | hca->name, port); | |
1587 | goto device_init_failed; | |
1588 | } | |
1589 | ||
1590 | /* MTU will be reset when mcast join happens */ | |
1591 | priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1592 | priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; | |
1593 | ||
596b9b68 DM |
1594 | priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh); |
1595 | ||
1da177e4 LT |
1596 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
1597 | if (result) { | |
1598 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1599 | hca->name, port, result); | |
ca6de177 | 1600 | goto device_init_failed; |
1da177e4 LT |
1601 | } |
1602 | ||
58e9cc90 AV |
1603 | result = ipoib_set_dev_features(priv, hca); |
1604 | if (result) | |
6046136c | 1605 | goto device_init_failed; |
af40da89 | 1606 | |
4ce05937 RD |
1607 | /* |
1608 | * Set the full membership bit, so that we join the right | |
1609 | * broadcast group, etc. | |
1610 | */ | |
1611 | priv->pkey |= 0x8000; | |
1612 | ||
1da177e4 LT |
1613 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1614 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1615 | ||
1616 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1617 | if (result) { | |
1618 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1619 | hca->name, port, result); | |
ca6de177 | 1620 | goto device_init_failed; |
1da177e4 LT |
1621 | } else |
1622 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1623 | ||
1da177e4 LT |
1624 | result = ipoib_dev_init(priv->dev, hca, port); |
1625 | if (result < 0) { | |
1626 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1627 | hca->name, port, result); | |
1628 | goto device_init_failed; | |
1629 | } | |
1630 | ||
1631 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1632 | priv->ca, ipoib_event); | |
1633 | result = ib_register_event_handler(&priv->event_handler); | |
1634 | if (result < 0) { | |
1635 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1636 | "port %d (ret = %d)\n", | |
1637 | hca->name, port, result); | |
1638 | goto event_failed; | |
1639 | } | |
1640 | ||
1641 | result = register_netdev(priv->dev); | |
1642 | if (result) { | |
1643 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1644 | hca->name, port, result); | |
1645 | goto register_failed; | |
1646 | } | |
1647 | ||
1732b0ef | 1648 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1649 | |
839fcaba MT |
1650 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1651 | goto sysfs_failed; | |
1da177e4 LT |
1652 | if (ipoib_add_pkey_attr(priv->dev)) |
1653 | goto sysfs_failed; | |
335a64a5 OG |
1654 | if (ipoib_add_umcast_attr(priv->dev)) |
1655 | goto sysfs_failed; | |
43cb76d9 | 1656 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1657 | goto sysfs_failed; |
43cb76d9 | 1658 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1659 | goto sysfs_failed; |
1660 | ||
1661 | return priv->dev; | |
1662 | ||
1663 | sysfs_failed: | |
1732b0ef | 1664 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1665 | unregister_netdev(priv->dev); |
1666 | ||
1667 | register_failed: | |
1668 | ib_unregister_event_handler(&priv->event_handler); | |
0b39578b | 1669 | flush_workqueue(ipoib_workqueue); |
b63b70d8 SP |
1670 | /* Stop GC if started before flush */ |
1671 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1672 | cancel_delayed_work(&priv->neigh_reap_task); | |
0b39578b | 1673 | flush_workqueue(priv->wq); |
1da177e4 LT |
1674 | |
1675 | event_failed: | |
1676 | ipoib_dev_cleanup(priv->dev); | |
1677 | ||
1678 | device_init_failed: | |
1679 | free_netdev(priv->dev); | |
1680 | ||
1681 | alloc_mem_failed: | |
1682 | return ERR_PTR(result); | |
1683 | } | |
1684 | ||
1685 | static void ipoib_add_one(struct ib_device *device) | |
1686 | { | |
1687 | struct list_head *dev_list; | |
1688 | struct net_device *dev; | |
1689 | struct ipoib_dev_priv *priv; | |
4139032b | 1690 | int p; |
8e37ab68 | 1691 | int count = 0; |
07ebafba | 1692 | |
1da177e4 LT |
1693 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1694 | if (!dev_list) | |
1695 | return; | |
1696 | ||
1697 | INIT_LIST_HEAD(dev_list); | |
1698 | ||
4139032b | 1699 | for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) { |
8e37ab68 | 1700 | if (!rdma_protocol_ib(device, p)) |
7b4c8769 | 1701 | continue; |
1da177e4 LT |
1702 | dev = ipoib_add_port("ib%d", device, p); |
1703 | if (!IS_ERR(dev)) { | |
1704 | priv = netdev_priv(dev); | |
1705 | list_add_tail(&priv->list, dev_list); | |
8e37ab68 | 1706 | count++; |
1da177e4 LT |
1707 | } |
1708 | } | |
1709 | ||
8e37ab68 MW |
1710 | if (!count) { |
1711 | kfree(dev_list); | |
1712 | return; | |
1713 | } | |
1714 | ||
1da177e4 LT |
1715 | ib_set_client_data(device, &ipoib_client, dev_list); |
1716 | } | |
1717 | ||
7c1eb45a | 1718 | static void ipoib_remove_one(struct ib_device *device, void *client_data) |
1da177e4 LT |
1719 | { |
1720 | struct ipoib_dev_priv *priv, *tmp; | |
7c1eb45a | 1721 | struct list_head *dev_list = client_data; |
1da177e4 | 1722 | |
5a2815f0 IG |
1723 | if (!dev_list) |
1724 | return; | |
1da177e4 LT |
1725 | |
1726 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1727 | ib_unregister_event_handler(&priv->event_handler); | |
0b39578b | 1728 | flush_workqueue(ipoib_workqueue); |
a77a57a1 RD |
1729 | |
1730 | rtnl_lock(); | |
1731 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
1732 | rtnl_unlock(); | |
1733 | ||
b63b70d8 SP |
1734 | /* Stop GC */ |
1735 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1736 | cancel_delayed_work(&priv->neigh_reap_task); | |
0b39578b | 1737 | flush_workqueue(priv->wq); |
1da177e4 LT |
1738 | |
1739 | unregister_netdev(priv->dev); | |
1da177e4 LT |
1740 | free_netdev(priv->dev); |
1741 | } | |
06c56e44 MT |
1742 | |
1743 | kfree(dev_list); | |
1da177e4 LT |
1744 | } |
1745 | ||
1746 | static int __init ipoib_init_module(void) | |
1747 | { | |
1748 | int ret; | |
1749 | ||
0f485251 SM |
1750 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1751 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1752 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1753 | ||
1754 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1755 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
732eacc0 | 1756 | ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); |
68e995a2 PS |
1757 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
1758 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
1759 | #endif | |
0f485251 | 1760 | |
f89271da EC |
1761 | /* |
1762 | * When copying small received packets, we only copy from the | |
1763 | * linear data part of the SKB, so we rely on this condition. | |
1764 | */ | |
1765 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
1766 | ||
1da177e4 LT |
1767 | ret = ipoib_register_debugfs(); |
1768 | if (ret) | |
1769 | return ret; | |
1770 | ||
1771 | /* | |
0b39578b DL |
1772 | * We create a global workqueue here that is used for all flush |
1773 | * operations. However, if you attempt to flush a workqueue | |
1774 | * from a task on that same workqueue, it deadlocks the system. | |
1775 | * We want to be able to flush the tasks associated with a | |
1776 | * specific net device, so we also create a workqueue for each | |
1777 | * netdevice. We queue up the tasks for that device only on | |
1778 | * its private workqueue, and we only queue up flush events | |
1779 | * on our global flush workqueue. This avoids the deadlocks. | |
1da177e4 | 1780 | */ |
0b39578b | 1781 | ipoib_workqueue = create_singlethread_workqueue("ipoib_flush"); |
1da177e4 LT |
1782 | if (!ipoib_workqueue) { |
1783 | ret = -ENOMEM; | |
1784 | goto err_fs; | |
1785 | } | |
1786 | ||
c1a0b23b MT |
1787 | ib_sa_register_client(&ipoib_sa_client); |
1788 | ||
1da177e4 LT |
1789 | ret = ib_register_client(&ipoib_client); |
1790 | if (ret) | |
c1a0b23b | 1791 | goto err_sa; |
1da177e4 | 1792 | |
9baa0b03 OG |
1793 | ret = ipoib_netlink_init(); |
1794 | if (ret) | |
1795 | goto err_client; | |
1796 | ||
1da177e4 LT |
1797 | return 0; |
1798 | ||
9baa0b03 OG |
1799 | err_client: |
1800 | ib_unregister_client(&ipoib_client); | |
1801 | ||
c1a0b23b MT |
1802 | err_sa: |
1803 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1804 | destroy_workqueue(ipoib_workqueue); |
1805 | ||
9adec1a8 RD |
1806 | err_fs: |
1807 | ipoib_unregister_debugfs(); | |
1808 | ||
1da177e4 LT |
1809 | return ret; |
1810 | } | |
1811 | ||
1812 | static void __exit ipoib_cleanup_module(void) | |
1813 | { | |
9baa0b03 | 1814 | ipoib_netlink_fini(); |
1da177e4 | 1815 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1816 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1817 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1818 | destroy_workqueue(ipoib_workqueue); |
1819 | } | |
1820 | ||
1821 | module_init(ipoib_init_module); | |
1822 | module_exit(ipoib_cleanup_module); |