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 | ||
e028cc55 | 107 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
1da177e4 LT |
108 | |
109 | if (ipoib_pkey_dev_delay_open(dev)) | |
110 | return 0; | |
111 | ||
b8a1b1ce RD |
112 | if (ipoib_ib_dev_open(dev)) |
113 | goto err_disable; | |
fe25c561 | 114 | |
b8a1b1ce RD |
115 | if (ipoib_ib_dev_up(dev)) |
116 | goto err_stop; | |
1da177e4 LT |
117 | |
118 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
119 | struct ipoib_dev_priv *cpriv; | |
120 | ||
121 | /* Bring up any child interfaces too */ | |
f47944cc | 122 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
123 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
124 | int flags; | |
125 | ||
126 | flags = cpriv->dev->flags; | |
127 | if (flags & IFF_UP) | |
128 | continue; | |
129 | ||
130 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
131 | } | |
f47944cc | 132 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
133 | } |
134 | ||
135 | netif_start_queue(dev); | |
136 | ||
137 | return 0; | |
b8a1b1ce RD |
138 | |
139 | err_stop: | |
140 | ipoib_ib_dev_stop(dev, 1); | |
141 | ||
142 | err_disable: | |
b8a1b1ce RD |
143 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
144 | ||
145 | return -EINVAL; | |
1da177e4 LT |
146 | } |
147 | ||
148 | static int ipoib_stop(struct net_device *dev) | |
149 | { | |
150 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
151 | ||
152 | ipoib_dbg(priv, "stopping interface\n"); | |
153 | ||
154 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
155 | ||
156 | netif_stop_queue(dev); | |
157 | ||
bea1e22d | 158 | ipoib_ib_dev_down(dev, 1); |
a77a57a1 | 159 | ipoib_ib_dev_stop(dev, 0); |
1da177e4 LT |
160 | |
161 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
162 | struct ipoib_dev_priv *cpriv; | |
163 | ||
164 | /* Bring down any child interfaces too */ | |
f47944cc | 165 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
166 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
167 | int flags; | |
168 | ||
169 | flags = cpriv->dev->flags; | |
170 | if (!(flags & IFF_UP)) | |
171 | continue; | |
172 | ||
173 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
174 | } | |
f47944cc | 175 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
176 | } |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
9baa0b03 OG |
181 | static void ipoib_uninit(struct net_device *dev) |
182 | { | |
183 | ipoib_dev_cleanup(dev); | |
184 | } | |
185 | ||
9ca36f7d | 186 | static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features) |
3d96c74d MM |
187 | { |
188 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
189 | ||
190 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
191 | features &= ~(NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO); | |
192 | ||
193 | return features; | |
194 | } | |
195 | ||
1da177e4 LT |
196 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
197 | { | |
198 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
199 | ||
839fcaba | 200 | /* dev->mtu > 2K ==> connected mode */ |
586a6934 PS |
201 | if (ipoib_cm_admin_enabled(dev)) { |
202 | if (new_mtu > ipoib_cm_max_mtu(dev)) | |
203 | return -EINVAL; | |
204 | ||
839fcaba MT |
205 | if (new_mtu > priv->mcast_mtu) |
206 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
207 | priv->mcast_mtu); | |
586a6934 | 208 | |
839fcaba MT |
209 | dev->mtu = new_mtu; |
210 | return 0; | |
211 | } | |
212 | ||
bc7b3a36 | 213 | if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) |
1da177e4 LT |
214 | return -EINVAL; |
215 | ||
216 | priv->admin_mtu = new_mtu; | |
217 | ||
218 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
71d9c5f9 RD |
223 | int ipoib_set_mode(struct net_device *dev, const char *buf) |
224 | { | |
225 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
226 | ||
227 | /* flush paths if we switch modes so that connections are restarted */ | |
228 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { | |
229 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
230 | ipoib_warn(priv, "enabling connected mode " | |
231 | "will cause multicast packet drops\n"); | |
232 | netdev_update_features(dev); | |
233 | rtnl_unlock(); | |
234 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; | |
235 | ||
236 | ipoib_flush_paths(dev); | |
237 | rtnl_lock(); | |
238 | return 0; | |
239 | } | |
240 | ||
241 | if (!strcmp(buf, "datagram\n")) { | |
242 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
243 | netdev_update_features(dev); | |
244 | dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); | |
245 | rtnl_unlock(); | |
246 | ipoib_flush_paths(dev); | |
247 | rtnl_lock(); | |
248 | return 0; | |
249 | } | |
250 | ||
251 | return -EINVAL; | |
252 | } | |
253 | ||
37c22a77 | 254 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
255 | { |
256 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
257 | struct rb_node *n = priv->path_tree.rb_node; | |
258 | struct ipoib_path *path; | |
259 | int ret; | |
260 | ||
261 | while (n) { | |
262 | path = rb_entry(n, struct ipoib_path, rb_node); | |
263 | ||
37c22a77 | 264 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
265 | sizeof (union ib_gid)); |
266 | ||
267 | if (ret < 0) | |
268 | n = n->rb_left; | |
269 | else if (ret > 0) | |
270 | n = n->rb_right; | |
271 | else | |
272 | return path; | |
273 | } | |
274 | ||
275 | return NULL; | |
276 | } | |
277 | ||
278 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
279 | { | |
280 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
281 | struct rb_node **n = &priv->path_tree.rb_node; | |
282 | struct rb_node *pn = NULL; | |
283 | struct ipoib_path *tpath; | |
284 | int ret; | |
285 | ||
286 | while (*n) { | |
287 | pn = *n; | |
288 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
289 | ||
290 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
291 | sizeof (union ib_gid)); | |
292 | if (ret < 0) | |
293 | n = &pn->rb_left; | |
294 | else if (ret > 0) | |
295 | n = &pn->rb_right; | |
296 | else | |
297 | return -EEXIST; | |
298 | } | |
299 | ||
300 | rb_link_node(&path->rb_node, pn, n); | |
301 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
302 | ||
303 | list_add_tail(&path->list, &priv->path_list); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
309 | { | |
1da177e4 | 310 | struct sk_buff *skb; |
1da177e4 LT |
311 | |
312 | while ((skb = __skb_dequeue(&path->queue))) | |
313 | dev_kfree_skb_irq(skb); | |
314 | ||
b63b70d8 | 315 | ipoib_dbg(netdev_priv(dev), "path_free\n"); |
1da177e4 | 316 | |
b63b70d8 SP |
317 | /* remove all neigh connected to this path */ |
318 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
1da177e4 LT |
319 | |
320 | if (path->ah) | |
321 | ipoib_put_ah(path->ah); | |
322 | ||
323 | kfree(path); | |
324 | } | |
325 | ||
1732b0ef RD |
326 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
327 | ||
328 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
329 | { | |
330 | struct ipoib_path_iter *iter; | |
331 | ||
332 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
333 | if (!iter) | |
334 | return NULL; | |
335 | ||
336 | iter->dev = dev; | |
337 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
338 | ||
339 | if (ipoib_path_iter_next(iter)) { | |
340 | kfree(iter); | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | return iter; | |
345 | } | |
346 | ||
347 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
348 | { | |
349 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
350 | struct rb_node *n; | |
351 | struct ipoib_path *path; | |
352 | int ret = 1; | |
353 | ||
354 | spin_lock_irq(&priv->lock); | |
355 | ||
356 | n = rb_first(&priv->path_tree); | |
357 | ||
358 | while (n) { | |
359 | path = rb_entry(n, struct ipoib_path, rb_node); | |
360 | ||
361 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
362 | sizeof (union ib_gid)) < 0) { | |
363 | iter->path = *path; | |
364 | ret = 0; | |
365 | break; | |
366 | } | |
367 | ||
368 | n = rb_next(n); | |
369 | } | |
370 | ||
371 | spin_unlock_irq(&priv->lock); | |
372 | ||
373 | return ret; | |
374 | } | |
375 | ||
376 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
377 | struct ipoib_path *path) | |
378 | { | |
379 | *path = iter->path; | |
380 | } | |
381 | ||
382 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
383 | ||
ee1e2c82 MS |
384 | void ipoib_mark_paths_invalid(struct net_device *dev) |
385 | { | |
386 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
387 | struct ipoib_path *path, *tp; | |
388 | ||
389 | spin_lock_irq(&priv->lock); | |
390 | ||
391 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
5b095d98 | 392 | ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", |
ee1e2c82 | 393 | be16_to_cpu(path->pathrec.dlid), |
fcace2fe | 394 | path->pathrec.dgid.raw); |
ee1e2c82 MS |
395 | path->valid = 0; |
396 | } | |
397 | ||
398 | spin_unlock_irq(&priv->lock); | |
399 | } | |
400 | ||
1da177e4 LT |
401 | void ipoib_flush_paths(struct net_device *dev) |
402 | { | |
403 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
404 | struct ipoib_path *path, *tp; | |
405 | LIST_HEAD(remove_list); | |
943c246e | 406 | unsigned long flags; |
1da177e4 | 407 | |
943c246e RD |
408 | netif_tx_lock_bh(dev); |
409 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 410 | |
157de229 | 411 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
412 | |
413 | list_for_each_entry(path, &remove_list, list) | |
414 | rb_erase(&path->rb_node, &priv->path_tree); | |
415 | ||
1da177e4 LT |
416 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
417 | if (path->query) | |
418 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
419 | spin_unlock_irqrestore(&priv->lock, flags); |
420 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
421 | wait_for_completion(&path->done); |
422 | path_free(dev, path); | |
943c246e RD |
423 | netif_tx_lock_bh(dev); |
424 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 425 | } |
943c246e RD |
426 | |
427 | spin_unlock_irqrestore(&priv->lock, flags); | |
428 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
429 | } |
430 | ||
431 | static void path_rec_completion(int status, | |
432 | struct ib_sa_path_rec *pathrec, | |
433 | void *path_ptr) | |
434 | { | |
435 | struct ipoib_path *path = path_ptr; | |
436 | struct net_device *dev = path->dev; | |
437 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
438 | struct ipoib_ah *ah = NULL; | |
c9da4bad | 439 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 440 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
441 | struct sk_buff_head skqueue; |
442 | struct sk_buff *skb; | |
443 | unsigned long flags; | |
444 | ||
843613b0 | 445 | if (!status) |
5b095d98 | 446 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
fcace2fe | 447 | be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); |
1da177e4 | 448 | else |
5b095d98 | 449 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 450 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
451 | |
452 | skb_queue_head_init(&skqueue); | |
453 | ||
454 | if (!status) { | |
46f1b3d7 SH |
455 | struct ib_ah_attr av; |
456 | ||
457 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
458 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
459 | } |
460 | ||
461 | spin_lock_irqsave(&priv->lock, flags); | |
462 | ||
3874397c | 463 | if (!IS_ERR_OR_NULL(ah)) { |
1da177e4 LT |
464 | path->pathrec = *pathrec; |
465 | ||
c9da4bad RD |
466 | old_ah = path->ah; |
467 | path->ah = ah; | |
468 | ||
1da177e4 LT |
469 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
470 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
471 | ||
472 | while ((skb = __skb_dequeue(&path->queue))) | |
473 | __skb_queue_tail(&skqueue, skb); | |
474 | ||
d04d01b1 | 475 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
476 | if (neigh->ah) { |
477 | WARN_ON(neigh->ah != old_ah); | |
478 | /* | |
479 | * Dropping the ah reference inside | |
480 | * priv->lock is safe here, because we | |
481 | * will hold one more reference from | |
482 | * the original value of path->ah (ie | |
483 | * old_ah). | |
484 | */ | |
485 | ipoib_put_ah(neigh->ah); | |
486 | } | |
1da177e4 LT |
487 | kref_get(&path->ah->ref); |
488 | neigh->ah = path->ah; | |
489 | ||
b63b70d8 | 490 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
491 | if (!ipoib_cm_get(neigh)) |
492 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
493 | path, | |
494 | neigh)); | |
495 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 496 | ipoib_neigh_free(neigh); |
839fcaba MT |
497 | continue; |
498 | } | |
499 | } | |
500 | ||
1da177e4 LT |
501 | while ((skb = __skb_dequeue(&neigh->queue))) |
502 | __skb_queue_tail(&skqueue, skb); | |
503 | } | |
ee1e2c82 | 504 | path->valid = 1; |
5872a9fc | 505 | } |
1da177e4 | 506 | |
5872a9fc | 507 | path->query = NULL; |
1da177e4 LT |
508 | complete(&path->done); |
509 | ||
510 | spin_unlock_irqrestore(&priv->lock, flags); | |
511 | ||
f72dd566 RD |
512 | if (IS_ERR_OR_NULL(ah)) |
513 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
514 | ||
ee1e2c82 MS |
515 | if (old_ah) |
516 | ipoib_put_ah(old_ah); | |
517 | ||
1da177e4 LT |
518 | while ((skb = __skb_dequeue(&skqueue))) { |
519 | skb->dev = dev; | |
520 | if (dev_queue_xmit(skb)) | |
521 | ipoib_warn(priv, "dev_queue_xmit failed " | |
522 | "to requeue packet\n"); | |
523 | } | |
524 | } | |
525 | ||
37c22a77 | 526 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
527 | { |
528 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
529 | struct ipoib_path *path; | |
530 | ||
1401b53a JM |
531 | if (!priv->broadcast) |
532 | return NULL; | |
533 | ||
21a38489 | 534 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
535 | if (!path) |
536 | return NULL; | |
537 | ||
21a38489 | 538 | path->dev = dev; |
1da177e4 LT |
539 | |
540 | skb_queue_head_init(&path->queue); | |
541 | ||
542 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 543 | |
37c22a77 | 544 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
2337f809 RD |
545 | path->pathrec.sgid = priv->local_gid; |
546 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
81668838 SH |
547 | path->pathrec.numb_path = 1; |
548 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
549 | |
550 | return path; | |
551 | } | |
552 | ||
553 | static int path_rec_start(struct net_device *dev, | |
554 | struct ipoib_path *path) | |
555 | { | |
556 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
557 | ||
5b095d98 | 558 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 559 | path->pathrec.dgid.raw); |
1da177e4 | 560 | |
65c7edda RD |
561 | init_completion(&path->done); |
562 | ||
1da177e4 | 563 | path->query_id = |
c1a0b23b | 564 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
565 | &path->pathrec, |
566 | IB_SA_PATH_REC_DGID | | |
567 | IB_SA_PATH_REC_SGID | | |
568 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 569 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
570 | IB_SA_PATH_REC_PKEY, |
571 | 1000, GFP_ATOMIC, | |
572 | path_rec_completion, | |
573 | path, &path->query); | |
574 | if (path->query_id < 0) { | |
01b3fc8b | 575 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 576 | path->query = NULL; |
93a3ab93 | 577 | complete(&path->done); |
1da177e4 LT |
578 | return path->query_id; |
579 | } | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
b63b70d8 SP |
584 | static void neigh_add_path(struct sk_buff *skb, u8 *daddr, |
585 | struct net_device *dev) | |
1da177e4 LT |
586 | { |
587 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
588 | struct ipoib_path *path; | |
589 | struct ipoib_neigh *neigh; | |
943c246e | 590 | unsigned long flags; |
1da177e4 | 591 | |
b5120a6e | 592 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 | 593 | neigh = ipoib_neigh_alloc(daddr, dev); |
1da177e4 | 594 | if (!neigh) { |
b5120a6e | 595 | spin_unlock_irqrestore(&priv->lock, flags); |
de903512 | 596 | ++dev->stats.tx_dropped; |
1da177e4 LT |
597 | dev_kfree_skb_any(skb); |
598 | return; | |
599 | } | |
600 | ||
b63b70d8 | 601 | path = __path_find(dev, daddr + 4); |
1da177e4 | 602 | if (!path) { |
b63b70d8 | 603 | path = path_rec_create(dev, daddr + 4); |
1da177e4 | 604 | if (!path) |
d2e0655e | 605 | goto err_path; |
1da177e4 LT |
606 | |
607 | __path_add(dev, path); | |
608 | } | |
609 | ||
610 | list_add_tail(&neigh->list, &path->neigh_list); | |
611 | ||
47f7a071 | 612 | if (path->ah) { |
1da177e4 LT |
613 | kref_get(&path->ah->ref); |
614 | neigh->ah = path->ah; | |
615 | ||
b63b70d8 | 616 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
617 | if (!ipoib_cm_get(neigh)) |
618 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
619 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 620 | ipoib_neigh_free(neigh); |
839fcaba MT |
621 | goto err_drop; |
622 | } | |
623 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
624 | __skb_queue_tail(&neigh->queue, skb); | |
625 | else { | |
626 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
627 | skb_queue_len(&neigh->queue)); | |
628 | goto err_drop; | |
629 | } | |
721d67cd RD |
630 | } else { |
631 | spin_unlock_irqrestore(&priv->lock, flags); | |
b63b70d8 SP |
632 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(daddr)); |
633 | ipoib_neigh_put(neigh); | |
721d67cd RD |
634 | return; |
635 | } | |
1da177e4 LT |
636 | } else { |
637 | neigh->ah = NULL; | |
1da177e4 LT |
638 | |
639 | if (!path->query && path_rec_start(dev, path)) | |
49b8e744 | 640 | goto err_path; |
2745b5b7 MT |
641 | |
642 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
643 | } |
644 | ||
943c246e | 645 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 646 | ipoib_neigh_put(neigh); |
1da177e4 LT |
647 | return; |
648 | ||
d2e0655e | 649 | err_path: |
b63b70d8 | 650 | ipoib_neigh_free(neigh); |
839fcaba | 651 | err_drop: |
de903512 | 652 | ++dev->stats.tx_dropped; |
1da177e4 LT |
653 | dev_kfree_skb_any(skb); |
654 | ||
943c246e | 655 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 656 | ipoib_neigh_put(neigh); |
1da177e4 LT |
657 | } |
658 | ||
659 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
936d7de3 | 660 | struct ipoib_cb *cb) |
1da177e4 LT |
661 | { |
662 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
663 | struct ipoib_path *path; | |
943c246e | 664 | unsigned long flags; |
1da177e4 | 665 | |
943c246e | 666 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 667 | |
936d7de3 | 668 | path = __path_find(dev, cb->hwaddr + 4); |
ee1e2c82 | 669 | if (!path || !path->valid) { |
71d98b46 JM |
670 | int new_path = 0; |
671 | ||
672 | if (!path) { | |
936d7de3 | 673 | path = path_rec_create(dev, cb->hwaddr + 4); |
71d98b46 JM |
674 | new_path = 1; |
675 | } | |
1da177e4 | 676 | if (path) { |
1da177e4 LT |
677 | __skb_queue_tail(&path->queue, skb); |
678 | ||
ff79ae80 | 679 | if (!path->query && path_rec_start(dev, path)) { |
943c246e | 680 | spin_unlock_irqrestore(&priv->lock, flags); |
71d98b46 JM |
681 | if (new_path) |
682 | path_free(dev, path); | |
1da177e4 LT |
683 | return; |
684 | } else | |
685 | __path_add(dev, path); | |
686 | } else { | |
de903512 | 687 | ++dev->stats.tx_dropped; |
1da177e4 LT |
688 | dev_kfree_skb_any(skb); |
689 | } | |
690 | ||
943c246e | 691 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
692 | return; |
693 | } | |
694 | ||
47f7a071 | 695 | if (path->ah) { |
1da177e4 LT |
696 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
697 | be16_to_cpu(path->pathrec.dlid)); | |
698 | ||
721d67cd | 699 | spin_unlock_irqrestore(&priv->lock, flags); |
936d7de3 | 700 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(cb->hwaddr)); |
721d67cd | 701 | return; |
1da177e4 LT |
702 | } else if ((path->query || !path_rec_start(dev, path)) && |
703 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
1da177e4 LT |
704 | __skb_queue_tail(&path->queue, skb); |
705 | } else { | |
de903512 | 706 | ++dev->stats.tx_dropped; |
1da177e4 LT |
707 | dev_kfree_skb_any(skb); |
708 | } | |
709 | ||
943c246e | 710 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
711 | } |
712 | ||
713 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
714 | { | |
715 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
716 | struct ipoib_neigh *neigh; | |
b63b70d8 SP |
717 | struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb; |
718 | struct ipoib_header *header; | |
1da177e4 LT |
719 | unsigned long flags; |
720 | ||
b63b70d8 SP |
721 | header = (struct ipoib_header *) skb->data; |
722 | ||
723 | if (unlikely(cb->hwaddr[4] == 0xff)) { | |
724 | /* multicast, arrange "if" according to probability */ | |
725 | if ((header->proto != htons(ETH_P_IP)) && | |
726 | (header->proto != htons(ETH_P_IPV6)) && | |
727 | (header->proto != htons(ETH_P_ARP)) && | |
dc850b0e PM |
728 | (header->proto != htons(ETH_P_RARP)) && |
729 | (header->proto != htons(ETH_P_TIPC))) { | |
b63b70d8 | 730 | /* ethertype not supported by IPoIB */ |
17e6abee DM |
731 | ++dev->stats.tx_dropped; |
732 | dev_kfree_skb_any(skb); | |
b63b70d8 | 733 | return NETDEV_TX_OK; |
17e6abee | 734 | } |
b63b70d8 SP |
735 | /* Add in the P_Key for multicast*/ |
736 | cb->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
737 | cb->hwaddr[9] = priv->pkey & 0xff; | |
738 | ||
739 | neigh = ipoib_neigh_get(dev, cb->hwaddr); | |
740 | if (likely(neigh)) | |
741 | goto send_using_neigh; | |
742 | ipoib_mcast_send(dev, cb->hwaddr, skb); | |
743 | return NETDEV_TX_OK; | |
17e6abee | 744 | } |
1da177e4 | 745 | |
b63b70d8 SP |
746 | /* unicast, arrange "switch" according to probability */ |
747 | switch (header->proto) { | |
748 | case htons(ETH_P_IP): | |
749 | case htons(ETH_P_IPV6): | |
dc850b0e | 750 | case htons(ETH_P_TIPC): |
b63b70d8 SP |
751 | neigh = ipoib_neigh_get(dev, cb->hwaddr); |
752 | if (unlikely(!neigh)) { | |
753 | neigh_add_path(skb, cb->hwaddr, dev); | |
754 | return NETDEV_TX_OK; | |
a50df398 | 755 | } |
b63b70d8 SP |
756 | break; |
757 | case htons(ETH_P_ARP): | |
758 | case htons(ETH_P_RARP): | |
759 | /* for unicast ARP and RARP should always perform path find */ | |
760 | unicast_arp_send(skb, dev, cb); | |
761 | return NETDEV_TX_OK; | |
762 | default: | |
763 | /* ethertype not supported by IPoIB */ | |
764 | ++dev->stats.tx_dropped; | |
765 | dev_kfree_skb_any(skb); | |
766 | return NETDEV_TX_OK; | |
767 | } | |
8a7f7521 | 768 | |
b63b70d8 SP |
769 | send_using_neigh: |
770 | /* note we now hold a ref to neigh */ | |
771 | if (ipoib_cm_get(neigh)) { | |
772 | if (ipoib_cm_up(neigh)) { | |
773 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
774 | goto unref; | |
1da177e4 | 775 | } |
b63b70d8 SP |
776 | } else if (neigh->ah) { |
777 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(cb->hwaddr)); | |
778 | goto unref; | |
779 | } | |
1da177e4 | 780 | |
b63b70d8 SP |
781 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
782 | spin_lock_irqsave(&priv->lock, flags); | |
783 | __skb_queue_tail(&neigh->queue, skb); | |
784 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 785 | } else { |
b63b70d8 SP |
786 | ++dev->stats.tx_dropped; |
787 | dev_kfree_skb_any(skb); | |
788 | } | |
1da177e4 | 789 | |
b63b70d8 SP |
790 | unref: |
791 | ipoib_neigh_put(neigh); | |
1da177e4 | 792 | |
1da177e4 LT |
793 | return NETDEV_TX_OK; |
794 | } | |
795 | ||
1da177e4 LT |
796 | static void ipoib_timeout(struct net_device *dev) |
797 | { | |
798 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
799 | ||
4b2d319b RD |
800 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
801 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
802 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
803 | netif_queue_stopped(dev), | |
804 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
805 | /* XXX reset QP, etc. */ |
806 | } | |
807 | ||
808 | static int ipoib_hard_header(struct sk_buff *skb, | |
809 | struct net_device *dev, | |
810 | unsigned short type, | |
3b04ddde | 811 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
812 | { |
813 | struct ipoib_header *header; | |
b63b70d8 | 814 | struct ipoib_cb *cb = (struct ipoib_cb *) skb->cb; |
1da177e4 LT |
815 | |
816 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
817 | ||
818 | header->proto = htons(type); | |
819 | header->reserved = 0; | |
820 | ||
821 | /* | |
b63b70d8 | 822 | * we don't rely on dst_entry structure, always stuff the |
936d7de3 RD |
823 | * destination address into skb->cb so we can figure out where |
824 | * to send the packet later. | |
1da177e4 | 825 | */ |
b63b70d8 | 826 | memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN); |
1da177e4 | 827 | |
83bdd3b9 | 828 | return sizeof *header; |
1da177e4 LT |
829 | } |
830 | ||
831 | static void ipoib_set_mcast_list(struct net_device *dev) | |
832 | { | |
833 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
834 | ||
7a343d4c LA |
835 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
836 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
837 | return; | |
838 | } | |
839 | ||
1ad62a19 | 840 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
841 | } |
842 | ||
b63b70d8 | 843 | static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) |
1da177e4 | 844 | { |
b63b70d8 SP |
845 | /* |
846 | * Use only the address parts that contributes to spreading | |
847 | * The subnet prefix is not used as one can not connect to | |
848 | * same remote port (GUID) using the same remote QPN via two | |
849 | * different subnets. | |
850 | */ | |
851 | /* qpn octets[1:4) & port GUID octets[12:20) */ | |
9d1ad66e | 852 | u32 *d32 = (u32 *) daddr; |
b63b70d8 SP |
853 | u32 hv; |
854 | ||
9d1ad66e | 855 | hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0); |
b63b70d8 SP |
856 | return hv & htbl->mask; |
857 | } | |
858 | ||
859 | struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr) | |
860 | { | |
861 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
862 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
863 | struct ipoib_neigh_hash *htbl; | |
864 | struct ipoib_neigh *neigh = NULL; | |
865 | u32 hash_val; | |
866 | ||
867 | rcu_read_lock_bh(); | |
868 | ||
869 | htbl = rcu_dereference_bh(ntbl->htbl); | |
870 | ||
871 | if (!htbl) | |
872 | goto out_unlock; | |
873 | ||
874 | hash_val = ipoib_addr_hash(htbl, daddr); | |
875 | for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]); | |
876 | neigh != NULL; | |
877 | neigh = rcu_dereference_bh(neigh->hnext)) { | |
878 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { | |
879 | /* found, take one ref on behalf of the caller */ | |
880 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
881 | /* deleted */ | |
882 | neigh = NULL; | |
883 | goto out_unlock; | |
884 | } | |
885 | neigh->alive = jiffies; | |
886 | goto out_unlock; | |
887 | } | |
888 | } | |
889 | ||
890 | out_unlock: | |
891 | rcu_read_unlock_bh(); | |
892 | return neigh; | |
893 | } | |
894 | ||
895 | static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv) | |
896 | { | |
897 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
898 | struct ipoib_neigh_hash *htbl; | |
899 | unsigned long neigh_obsolete; | |
900 | unsigned long dt; | |
1da177e4 | 901 | unsigned long flags; |
b63b70d8 | 902 | int i; |
1da177e4 | 903 | |
b63b70d8 | 904 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) |
732a2170 | 905 | return; |
1da177e4 | 906 | |
b5120a6e | 907 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
908 | |
909 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 910 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
911 | |
912 | if (!htbl) | |
913 | goto out_unlock; | |
914 | ||
915 | /* neigh is obsolete if it was idle for two GC periods */ | |
916 | dt = 2 * arp_tbl.gc_interval; | |
917 | neigh_obsolete = jiffies - dt; | |
918 | /* handle possible race condition */ | |
919 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
920 | goto out_unlock; | |
921 | ||
922 | for (i = 0; i < htbl->size; i++) { | |
923 | struct ipoib_neigh *neigh; | |
924 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
925 | ||
926 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 927 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
928 | /* was the neigh idle for two GC periods */ |
929 | if (time_after(neigh_obsolete, neigh->alive)) { | |
930 | rcu_assign_pointer(*np, | |
931 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 932 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 933 | /* remove from path/mc list */ |
b63b70d8 | 934 | list_del(&neigh->list); |
b63b70d8 SP |
935 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
936 | } else { | |
937 | np = &neigh->hnext; | |
938 | } | |
1da177e4 | 939 | |
b63b70d8 SP |
940 | } |
941 | } | |
1da177e4 | 942 | |
b63b70d8 | 943 | out_unlock: |
b5120a6e | 944 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 945 | } |
1da177e4 | 946 | |
b63b70d8 SP |
947 | static void ipoib_reap_neigh(struct work_struct *work) |
948 | { | |
949 | struct ipoib_dev_priv *priv = | |
950 | container_of(work, struct ipoib_dev_priv, neigh_reap_task.work); | |
951 | ||
952 | __ipoib_reap_neigh(priv); | |
953 | ||
954 | if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
955 | queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task, | |
956 | arp_tbl.gc_interval); | |
1da177e4 LT |
957 | } |
958 | ||
b63b70d8 SP |
959 | |
960 | static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr, | |
732a2170 | 961 | struct net_device *dev) |
d2e0655e MT |
962 | { |
963 | struct ipoib_neigh *neigh; | |
964 | ||
b63b70d8 | 965 | neigh = kzalloc(sizeof *neigh, GFP_ATOMIC); |
d2e0655e MT |
966 | if (!neigh) |
967 | return NULL; | |
968 | ||
732a2170 | 969 | neigh->dev = dev; |
b63b70d8 | 970 | memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr)); |
82b39913 | 971 | skb_queue_head_init(&neigh->queue); |
b63b70d8 | 972 | INIT_LIST_HEAD(&neigh->list); |
839fcaba | 973 | ipoib_cm_set(neigh, NULL); |
b63b70d8 SP |
974 | /* one ref on behalf of the caller */ |
975 | atomic_set(&neigh->refcnt, 1); | |
976 | ||
977 | return neigh; | |
978 | } | |
979 | ||
980 | struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr, | |
981 | struct net_device *dev) | |
982 | { | |
983 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
984 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
985 | struct ipoib_neigh_hash *htbl; | |
986 | struct ipoib_neigh *neigh; | |
987 | u32 hash_val; | |
988 | ||
b63b70d8 | 989 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 990 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
991 | if (!htbl) { |
992 | neigh = NULL; | |
993 | goto out_unlock; | |
994 | } | |
995 | ||
996 | /* need to add a new neigh, but maybe some other thread succeeded? | |
997 | * recalc hash, maybe hash resize took place so we do a search | |
998 | */ | |
999 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1000 | for (neigh = rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1001 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1002 | neigh != NULL; |
1003 | neigh = rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1004 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1005 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { |
1006 | /* found, take one ref on behalf of the caller */ | |
1007 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1008 | /* deleted */ | |
1009 | neigh = NULL; | |
1010 | break; | |
1011 | } | |
1012 | neigh->alive = jiffies; | |
1013 | goto out_unlock; | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | neigh = ipoib_neigh_ctor(daddr, dev); | |
1018 | if (!neigh) | |
1019 | goto out_unlock; | |
1020 | ||
1021 | /* one ref on behalf of the hash table */ | |
1022 | atomic_inc(&neigh->refcnt); | |
1023 | neigh->alive = jiffies; | |
1024 | /* put in hash */ | |
1025 | rcu_assign_pointer(neigh->hnext, | |
1026 | rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1027 | lockdep_is_held(&priv->lock))); |
b63b70d8 SP |
1028 | rcu_assign_pointer(htbl->buckets[hash_val], neigh); |
1029 | atomic_inc(&ntbl->entries); | |
1030 | ||
1031 | out_unlock: | |
d2e0655e MT |
1032 | |
1033 | return neigh; | |
1034 | } | |
1035 | ||
b63b70d8 | 1036 | void ipoib_neigh_dtor(struct ipoib_neigh *neigh) |
d2e0655e | 1037 | { |
b63b70d8 SP |
1038 | /* neigh reference count was dropprd to zero */ |
1039 | struct net_device *dev = neigh->dev; | |
1040 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2745b5b7 | 1041 | struct sk_buff *skb; |
b63b70d8 SP |
1042 | if (neigh->ah) |
1043 | ipoib_put_ah(neigh->ah); | |
2745b5b7 | 1044 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 1045 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
1046 | dev_kfree_skb_any(skb); |
1047 | } | |
839fcaba MT |
1048 | if (ipoib_cm_get(neigh)) |
1049 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
b63b70d8 SP |
1050 | ipoib_dbg(netdev_priv(dev), |
1051 | "neigh free for %06x %pI6\n", | |
1052 | IPOIB_QPN(neigh->daddr), | |
1053 | neigh->daddr + 4); | |
d2e0655e | 1054 | kfree(neigh); |
b63b70d8 SP |
1055 | if (atomic_dec_and_test(&priv->ntbl.entries)) { |
1056 | if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags)) | |
1057 | complete(&priv->ntbl.flushed); | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | static void ipoib_neigh_reclaim(struct rcu_head *rp) | |
1062 | { | |
1063 | /* Called as a result of removal from hash table */ | |
1064 | struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu); | |
1065 | /* note TX context may hold another ref */ | |
1066 | ipoib_neigh_put(neigh); | |
d2e0655e MT |
1067 | } |
1068 | ||
b63b70d8 | 1069 | void ipoib_neigh_free(struct ipoib_neigh *neigh) |
1da177e4 | 1070 | { |
b63b70d8 SP |
1071 | struct net_device *dev = neigh->dev; |
1072 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1073 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1074 | struct ipoib_neigh_hash *htbl; | |
1075 | struct ipoib_neigh __rcu **np; | |
1076 | struct ipoib_neigh *n; | |
1077 | u32 hash_val; | |
1078 | ||
b63b70d8 | 1079 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1080 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1081 | if (!htbl) |
b5120a6e | 1082 | return; |
b63b70d8 SP |
1083 | |
1084 | hash_val = ipoib_addr_hash(htbl, neigh->daddr); | |
1085 | np = &htbl->buckets[hash_val]; | |
1086 | for (n = rcu_dereference_protected(*np, | |
b5120a6e | 1087 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1088 | n != NULL; |
6c723a68 | 1089 | n = rcu_dereference_protected(*np, |
b5120a6e | 1090 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1091 | if (n == neigh) { |
1092 | /* found */ | |
1093 | rcu_assign_pointer(*np, | |
1094 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1095 | lockdep_is_held(&priv->lock))); |
49b8e744 JF |
1096 | /* remove from parent list */ |
1097 | list_del(&neigh->list); | |
b63b70d8 | 1098 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
b5120a6e | 1099 | return; |
b63b70d8 SP |
1100 | } else { |
1101 | np = &n->hnext; | |
1102 | } | |
1103 | } | |
b63b70d8 SP |
1104 | } |
1105 | ||
1106 | static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) | |
1107 | { | |
1108 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1109 | struct ipoib_neigh_hash *htbl; | |
1110 | struct ipoib_neigh **buckets; | |
1111 | u32 size; | |
1112 | ||
1113 | clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); | |
1114 | ntbl->htbl = NULL; | |
b63b70d8 SP |
1115 | htbl = kzalloc(sizeof(*htbl), GFP_KERNEL); |
1116 | if (!htbl) | |
1117 | return -ENOMEM; | |
1118 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1119 | size = roundup_pow_of_two(arp_tbl.gc_thresh3); | |
1120 | buckets = kzalloc(size * sizeof(*buckets), GFP_KERNEL); | |
1121 | if (!buckets) { | |
1122 | kfree(htbl); | |
1123 | return -ENOMEM; | |
1124 | } | |
1125 | htbl->size = size; | |
1126 | htbl->mask = (size - 1); | |
1127 | htbl->buckets = buckets; | |
1128 | ntbl->htbl = htbl; | |
66172c09 | 1129 | htbl->ntbl = ntbl; |
b63b70d8 SP |
1130 | atomic_set(&ntbl->entries, 0); |
1131 | ||
1132 | /* start garbage collection */ | |
1133 | clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1134 | queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task, | |
1135 | arp_tbl.gc_interval); | |
1da177e4 LT |
1136 | |
1137 | return 0; | |
1138 | } | |
1139 | ||
b63b70d8 SP |
1140 | static void neigh_hash_free_rcu(struct rcu_head *head) |
1141 | { | |
1142 | struct ipoib_neigh_hash *htbl = container_of(head, | |
1143 | struct ipoib_neigh_hash, | |
1144 | rcu); | |
1145 | struct ipoib_neigh __rcu **buckets = htbl->buckets; | |
66172c09 | 1146 | struct ipoib_neigh_table *ntbl = htbl->ntbl; |
b63b70d8 SP |
1147 | |
1148 | kfree(buckets); | |
1149 | kfree(htbl); | |
66172c09 | 1150 | complete(&ntbl->deleted); |
b63b70d8 SP |
1151 | } |
1152 | ||
1153 | void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid) | |
1154 | { | |
1155 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1156 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1157 | struct ipoib_neigh_hash *htbl; | |
1158 | unsigned long flags; | |
1159 | int i; | |
1160 | ||
1161 | /* remove all neigh connected to a given path or mcast */ | |
b5120a6e | 1162 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1163 | |
1164 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1165 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1166 | |
1167 | if (!htbl) | |
1168 | goto out_unlock; | |
1169 | ||
1170 | for (i = 0; i < htbl->size; i++) { | |
1171 | struct ipoib_neigh *neigh; | |
1172 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1173 | ||
1174 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1175 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1176 | /* delete neighs belong to this parent */ |
1177 | if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) { | |
1178 | rcu_assign_pointer(*np, | |
1179 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1180 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1181 | /* remove from parent list */ |
b63b70d8 | 1182 | list_del(&neigh->list); |
b63b70d8 SP |
1183 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1184 | } else { | |
1185 | np = &neigh->hnext; | |
1186 | } | |
1187 | ||
1188 | } | |
1189 | } | |
1190 | out_unlock: | |
b5120a6e | 1191 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 SP |
1192 | } |
1193 | ||
1194 | static void ipoib_flush_neighs(struct ipoib_dev_priv *priv) | |
1195 | { | |
1196 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1197 | struct ipoib_neigh_hash *htbl; | |
1198 | unsigned long flags; | |
66172c09 | 1199 | int i, wait_flushed = 0; |
b63b70d8 | 1200 | |
66172c09 | 1201 | init_completion(&priv->ntbl.flushed); |
b63b70d8 | 1202 | |
b5120a6e | 1203 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1204 | |
1205 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1206 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1207 | if (!htbl) |
1208 | goto out_unlock; | |
1209 | ||
66172c09 SP |
1210 | wait_flushed = atomic_read(&priv->ntbl.entries); |
1211 | if (!wait_flushed) | |
1212 | goto free_htbl; | |
1213 | ||
b63b70d8 SP |
1214 | for (i = 0; i < htbl->size; i++) { |
1215 | struct ipoib_neigh *neigh; | |
1216 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1217 | ||
1218 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1219 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1220 | rcu_assign_pointer(*np, |
1221 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1222 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1223 | /* remove from path/mc list */ |
b63b70d8 | 1224 | list_del(&neigh->list); |
b63b70d8 SP |
1225 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1226 | } | |
1227 | } | |
1228 | ||
66172c09 | 1229 | free_htbl: |
b63b70d8 SP |
1230 | rcu_assign_pointer(ntbl->htbl, NULL); |
1231 | call_rcu(&htbl->rcu, neigh_hash_free_rcu); | |
1232 | ||
1233 | out_unlock: | |
b5120a6e | 1234 | spin_unlock_irqrestore(&priv->lock, flags); |
66172c09 SP |
1235 | if (wait_flushed) |
1236 | wait_for_completion(&priv->ntbl.flushed); | |
b63b70d8 SP |
1237 | } |
1238 | ||
1239 | static void ipoib_neigh_hash_uninit(struct net_device *dev) | |
1240 | { | |
1241 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1242 | int stopped; | |
1243 | ||
1244 | ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n"); | |
66172c09 | 1245 | init_completion(&priv->ntbl.deleted); |
b63b70d8 SP |
1246 | set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); |
1247 | ||
1248 | /* Stop GC if called at init fail need to cancel work */ | |
1249 | stopped = test_and_set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1250 | if (!stopped) | |
1251 | cancel_delayed_work(&priv->neigh_reap_task); | |
1252 | ||
66172c09 SP |
1253 | ipoib_flush_neighs(priv); |
1254 | ||
1255 | wait_for_completion(&priv->ntbl.deleted); | |
b63b70d8 SP |
1256 | } |
1257 | ||
1258 | ||
1da177e4 LT |
1259 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
1260 | { | |
1261 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1262 | ||
b63b70d8 SP |
1263 | if (ipoib_neigh_hash_init(priv) < 0) |
1264 | goto out; | |
1da177e4 | 1265 | /* Allocate RX/TX "rings" to hold queued skbs */ |
0f485251 | 1266 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
1267 | GFP_KERNEL); |
1268 | if (!priv->rx_ring) { | |
1269 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 1270 | ca->name, ipoib_recvq_size); |
b63b70d8 | 1271 | goto out_neigh_hash_cleanup; |
1da177e4 | 1272 | } |
1da177e4 | 1273 | |
948579cd | 1274 | priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 LT |
1275 | if (!priv->tx_ring) { |
1276 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 1277 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
1278 | goto out_rx_ring_cleanup; |
1279 | } | |
1da177e4 | 1280 | |
1b524963 | 1281 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
1282 | |
1283 | if (ipoib_ib_dev_init(dev, ca, port)) | |
1284 | goto out_tx_ring_cleanup; | |
1285 | ||
1286 | return 0; | |
1287 | ||
1288 | out_tx_ring_cleanup: | |
10313cbb | 1289 | vfree(priv->tx_ring); |
1da177e4 LT |
1290 | |
1291 | out_rx_ring_cleanup: | |
1292 | kfree(priv->rx_ring); | |
1293 | ||
b63b70d8 SP |
1294 | out_neigh_hash_cleanup: |
1295 | ipoib_neigh_hash_uninit(dev); | |
1da177e4 LT |
1296 | out: |
1297 | return -ENOMEM; | |
1298 | } | |
1299 | ||
1300 | void ipoib_dev_cleanup(struct net_device *dev) | |
1301 | { | |
1302 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
9baa0b03 OG |
1303 | LIST_HEAD(head); |
1304 | ||
1305 | ASSERT_RTNL(); | |
1da177e4 | 1306 | |
1732b0ef | 1307 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
1308 | |
1309 | /* Delete any child interfaces first */ | |
1310 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
b63b70d8 SP |
1311 | /* Stop GC on child */ |
1312 | set_bit(IPOIB_STOP_NEIGH_GC, &cpriv->flags); | |
1313 | cancel_delayed_work(&cpriv->neigh_reap_task); | |
9baa0b03 | 1314 | unregister_netdevice_queue(cpriv->dev, &head); |
1da177e4 | 1315 | } |
9baa0b03 | 1316 | unregister_netdevice_many(&head); |
1da177e4 LT |
1317 | |
1318 | ipoib_ib_dev_cleanup(dev); | |
1319 | ||
92a6b34b | 1320 | kfree(priv->rx_ring); |
10313cbb | 1321 | vfree(priv->tx_ring); |
1da177e4 | 1322 | |
92a6b34b HR |
1323 | priv->rx_ring = NULL; |
1324 | priv->tx_ring = NULL; | |
b63b70d8 SP |
1325 | |
1326 | ipoib_neigh_hash_uninit(dev); | |
1da177e4 LT |
1327 | } |
1328 | ||
3b04ddde SH |
1329 | static const struct header_ops ipoib_header_ops = { |
1330 | .create = ipoib_hard_header, | |
1331 | }; | |
1332 | ||
fe8114e8 | 1333 | static const struct net_device_ops ipoib_netdev_ops = { |
9baa0b03 | 1334 | .ndo_uninit = ipoib_uninit, |
fe8114e8 SH |
1335 | .ndo_open = ipoib_open, |
1336 | .ndo_stop = ipoib_stop, | |
1337 | .ndo_change_mtu = ipoib_change_mtu, | |
3d96c74d | 1338 | .ndo_fix_features = ipoib_fix_features, |
fe8114e8 SH |
1339 | .ndo_start_xmit = ipoib_start_xmit, |
1340 | .ndo_tx_timeout = ipoib_timeout, | |
afc4b13d | 1341 | .ndo_set_rx_mode = ipoib_set_mcast_list, |
fe8114e8 SH |
1342 | }; |
1343 | ||
9baa0b03 | 1344 | void ipoib_setup(struct net_device *dev) |
1da177e4 LT |
1345 | { |
1346 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1347 | ||
fe8114e8 | 1348 | dev->netdev_ops = &ipoib_netdev_ops; |
2337f809 | 1349 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 1350 | |
82c24c18 EC |
1351 | ipoib_set_ethtool_ops(dev); |
1352 | ||
7f1a3867 | 1353 | netif_napi_add(dev, &priv->napi, ipoib_poll, NAPI_POLL_WEIGHT); |
1da177e4 | 1354 | |
2337f809 | 1355 | dev->watchdog_timeo = HZ; |
1da177e4 | 1356 | |
2337f809 | 1357 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 | 1358 | |
936d7de3 | 1359 | dev->hard_header_len = IPOIB_ENCAP_LEN; |
2337f809 RD |
1360 | dev->addr_len = INFINIBAND_ALEN; |
1361 | dev->type = ARPHRD_INFINIBAND; | |
1362 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 1363 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 1364 | NETIF_F_HIGHDMA); |
86d15cd8 | 1365 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 | 1366 | |
1da177e4 LT |
1367 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
1368 | ||
1369 | netif_carrier_off(dev); | |
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 | ||
26bbf13c | 1382 | INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); |
c4028958 | 1383 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 1384 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
1385 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
1386 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
1387 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
1388 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
1389 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
b63b70d8 | 1390 | INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh); |
1da177e4 LT |
1391 | } |
1392 | ||
1393 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1394 | { | |
1395 | struct net_device *dev; | |
1396 | ||
1397 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
1398 | ipoib_setup); | |
1399 | if (!dev) | |
1400 | return NULL; | |
1401 | ||
1402 | return netdev_priv(dev); | |
1403 | } | |
1404 | ||
43cb76d9 GKH |
1405 | static ssize_t show_pkey(struct device *dev, |
1406 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1407 | { |
43cb76d9 | 1408 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1409 | |
1410 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1411 | } | |
43cb76d9 | 1412 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1413 | |
335a64a5 OG |
1414 | static ssize_t show_umcast(struct device *dev, |
1415 | struct device_attribute *attr, char *buf) | |
1416 | { | |
1417 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1418 | ||
1419 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1420 | } | |
1421 | ||
862096a8 | 1422 | void ipoib_set_umcast(struct net_device *ndev, int umcast_val) |
335a64a5 | 1423 | { |
862096a8 | 1424 | struct ipoib_dev_priv *priv = netdev_priv(ndev); |
335a64a5 OG |
1425 | |
1426 | if (umcast_val > 0) { | |
1427 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1428 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1429 | "by userspace\n"); | |
1430 | } else | |
1431 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
862096a8 OG |
1432 | } |
1433 | ||
1434 | static ssize_t set_umcast(struct device *dev, | |
1435 | struct device_attribute *attr, | |
1436 | const char *buf, size_t count) | |
1437 | { | |
1438 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1439 | ||
1440 | ipoib_set_umcast(to_net_dev(dev), umcast_val); | |
335a64a5 OG |
1441 | |
1442 | return count; | |
1443 | } | |
1444 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1445 | ||
1446 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1447 | { | |
1448 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1449 | } | |
1450 | ||
43cb76d9 GKH |
1451 | static ssize_t create_child(struct device *dev, |
1452 | struct device_attribute *attr, | |
1da177e4 LT |
1453 | const char *buf, size_t count) |
1454 | { | |
1455 | int pkey; | |
1456 | int ret; | |
1457 | ||
1458 | if (sscanf(buf, "%i", &pkey) != 1) | |
1459 | return -EINVAL; | |
1460 | ||
3d790a4c | 1461 | if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000) |
1da177e4 LT |
1462 | return -EINVAL; |
1463 | ||
4ce05937 RD |
1464 | /* |
1465 | * Set the full membership bit, so that we join the right | |
1466 | * broadcast group, etc. | |
1467 | */ | |
1468 | pkey |= 0x8000; | |
1469 | ||
43cb76d9 | 1470 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1471 | |
1472 | return ret ? ret : count; | |
1473 | } | |
7a52b34b | 1474 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 1475 | |
43cb76d9 GKH |
1476 | static ssize_t delete_child(struct device *dev, |
1477 | struct device_attribute *attr, | |
1da177e4 LT |
1478 | const char *buf, size_t count) |
1479 | { | |
1480 | int pkey; | |
1481 | int ret; | |
1482 | ||
1483 | if (sscanf(buf, "%i", &pkey) != 1) | |
1484 | return -EINVAL; | |
1485 | ||
1486 | if (pkey < 0 || pkey > 0xffff) | |
1487 | return -EINVAL; | |
1488 | ||
43cb76d9 | 1489 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1490 | |
1491 | return ret ? ret : count; | |
1492 | ||
1493 | } | |
7a52b34b | 1494 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
1495 | |
1496 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1497 | { | |
43cb76d9 | 1498 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1499 | } |
1500 | ||
83bb63f6 OG |
1501 | int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) |
1502 | { | |
1503 | struct ib_device_attr *device_attr; | |
1504 | int result = -ENOMEM; | |
1505 | ||
1506 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
1507 | if (!device_attr) { | |
1508 | printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", | |
1509 | hca->name, sizeof *device_attr); | |
1510 | return result; | |
1511 | } | |
1512 | ||
1513 | result = ib_query_device(hca, device_attr); | |
1514 | if (result) { | |
1515 | printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", | |
1516 | hca->name, result); | |
1517 | kfree(device_attr); | |
1518 | return result; | |
1519 | } | |
1520 | priv->hca_caps = device_attr->device_cap_flags; | |
1521 | ||
1522 | kfree(device_attr); | |
1523 | ||
1524 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
3d96c74d MM |
1525 | priv->dev->hw_features = NETIF_F_SG | |
1526 | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; | |
83bb63f6 | 1527 | |
3d96c74d MM |
1528 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
1529 | priv->dev->hw_features |= NETIF_F_TSO; | |
8ae31e5b | 1530 | |
3d96c74d MM |
1531 | priv->dev->features |= priv->dev->hw_features; |
1532 | } | |
83bb63f6 OG |
1533 | |
1534 | return 0; | |
1535 | } | |
1536 | ||
1da177e4 LT |
1537 | static struct net_device *ipoib_add_port(const char *format, |
1538 | struct ib_device *hca, u8 port) | |
1539 | { | |
1540 | struct ipoib_dev_priv *priv; | |
bc7b3a36 | 1541 | struct ib_port_attr attr; |
1da177e4 LT |
1542 | int result = -ENOMEM; |
1543 | ||
1544 | priv = ipoib_intf_alloc(format); | |
1545 | if (!priv) | |
1546 | goto alloc_mem_failed; | |
1547 | ||
1548 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
c3aa9b18 | 1549 | priv->dev->dev_id = port - 1; |
1da177e4 | 1550 | |
bc7b3a36 SM |
1551 | if (!ib_query_port(hca, port, &attr)) |
1552 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); | |
1553 | else { | |
1554 | printk(KERN_WARNING "%s: ib_query_port %d failed\n", | |
1555 | hca->name, port); | |
1556 | goto device_init_failed; | |
1557 | } | |
1558 | ||
1559 | /* MTU will be reset when mcast join happens */ | |
1560 | priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1561 | priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; | |
1562 | ||
596b9b68 DM |
1563 | priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh); |
1564 | ||
1da177e4 LT |
1565 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
1566 | if (result) { | |
1567 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1568 | hca->name, port, result); | |
ca6de177 | 1569 | goto device_init_failed; |
1da177e4 LT |
1570 | } |
1571 | ||
83bb63f6 | 1572 | if (ipoib_set_dev_features(priv, hca)) |
6046136c | 1573 | goto device_init_failed; |
af40da89 | 1574 | |
4ce05937 RD |
1575 | /* |
1576 | * Set the full membership bit, so that we join the right | |
1577 | * broadcast group, etc. | |
1578 | */ | |
1579 | priv->pkey |= 0x8000; | |
1580 | ||
1da177e4 LT |
1581 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1582 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1583 | ||
1584 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1585 | if (result) { | |
1586 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1587 | hca->name, port, result); | |
ca6de177 | 1588 | goto device_init_failed; |
1da177e4 LT |
1589 | } else |
1590 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1591 | ||
1da177e4 LT |
1592 | result = ipoib_dev_init(priv->dev, hca, port); |
1593 | if (result < 0) { | |
1594 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1595 | hca->name, port, result); | |
1596 | goto device_init_failed; | |
1597 | } | |
1598 | ||
1599 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1600 | priv->ca, ipoib_event); | |
1601 | result = ib_register_event_handler(&priv->event_handler); | |
1602 | if (result < 0) { | |
1603 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1604 | "port %d (ret = %d)\n", | |
1605 | hca->name, port, result); | |
1606 | goto event_failed; | |
1607 | } | |
1608 | ||
1609 | result = register_netdev(priv->dev); | |
1610 | if (result) { | |
1611 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1612 | hca->name, port, result); | |
1613 | goto register_failed; | |
1614 | } | |
1615 | ||
1732b0ef | 1616 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1617 | |
839fcaba MT |
1618 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1619 | goto sysfs_failed; | |
1da177e4 LT |
1620 | if (ipoib_add_pkey_attr(priv->dev)) |
1621 | goto sysfs_failed; | |
335a64a5 OG |
1622 | if (ipoib_add_umcast_attr(priv->dev)) |
1623 | goto sysfs_failed; | |
43cb76d9 | 1624 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1625 | goto sysfs_failed; |
43cb76d9 | 1626 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1627 | goto sysfs_failed; |
1628 | ||
1629 | return priv->dev; | |
1630 | ||
1631 | sysfs_failed: | |
1732b0ef | 1632 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1633 | unregister_netdev(priv->dev); |
1634 | ||
1635 | register_failed: | |
1636 | ib_unregister_event_handler(&priv->event_handler); | |
b63b70d8 SP |
1637 | /* Stop GC if started before flush */ |
1638 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1639 | cancel_delayed_work(&priv->neigh_reap_task); | |
a77a57a1 | 1640 | flush_workqueue(ipoib_workqueue); |
1da177e4 LT |
1641 | |
1642 | event_failed: | |
1643 | ipoib_dev_cleanup(priv->dev); | |
1644 | ||
1645 | device_init_failed: | |
1646 | free_netdev(priv->dev); | |
1647 | ||
1648 | alloc_mem_failed: | |
1649 | return ERR_PTR(result); | |
1650 | } | |
1651 | ||
1652 | static void ipoib_add_one(struct ib_device *device) | |
1653 | { | |
1654 | struct list_head *dev_list; | |
1655 | struct net_device *dev; | |
1656 | struct ipoib_dev_priv *priv; | |
1657 | int s, e, p; | |
1658 | ||
07ebafba TT |
1659 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1660 | return; | |
1661 | ||
1da177e4 LT |
1662 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1663 | if (!dev_list) | |
1664 | return; | |
1665 | ||
1666 | INIT_LIST_HEAD(dev_list); | |
1667 | ||
07ebafba | 1668 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1669 | s = 0; |
1670 | e = 0; | |
1671 | } else { | |
1672 | s = 1; | |
1673 | e = device->phys_port_cnt; | |
1674 | } | |
1675 | ||
1676 | for (p = s; p <= e; ++p) { | |
7b4c8769 EC |
1677 | if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) |
1678 | continue; | |
1da177e4 LT |
1679 | dev = ipoib_add_port("ib%d", device, p); |
1680 | if (!IS_ERR(dev)) { | |
1681 | priv = netdev_priv(dev); | |
1682 | list_add_tail(&priv->list, dev_list); | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1687 | } | |
1688 | ||
1689 | static void ipoib_remove_one(struct ib_device *device) | |
1690 | { | |
1691 | struct ipoib_dev_priv *priv, *tmp; | |
1692 | struct list_head *dev_list; | |
1693 | ||
07ebafba TT |
1694 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1695 | return; | |
1696 | ||
1da177e4 | 1697 | dev_list = ib_get_client_data(device, &ipoib_client); |
5a2815f0 IG |
1698 | if (!dev_list) |
1699 | return; | |
1da177e4 LT |
1700 | |
1701 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1702 | ib_unregister_event_handler(&priv->event_handler); | |
a77a57a1 RD |
1703 | |
1704 | rtnl_lock(); | |
1705 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
1706 | rtnl_unlock(); | |
1707 | ||
b63b70d8 SP |
1708 | /* Stop GC */ |
1709 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1710 | cancel_delayed_work(&priv->neigh_reap_task); | |
a77a57a1 | 1711 | flush_workqueue(ipoib_workqueue); |
1da177e4 LT |
1712 | |
1713 | unregister_netdev(priv->dev); | |
1da177e4 LT |
1714 | free_netdev(priv->dev); |
1715 | } | |
06c56e44 MT |
1716 | |
1717 | kfree(dev_list); | |
1da177e4 LT |
1718 | } |
1719 | ||
1720 | static int __init ipoib_init_module(void) | |
1721 | { | |
1722 | int ret; | |
1723 | ||
0f485251 SM |
1724 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1725 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1726 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1727 | ||
1728 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1729 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
732eacc0 | 1730 | ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); |
68e995a2 PS |
1731 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
1732 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
1733 | #endif | |
0f485251 | 1734 | |
f89271da EC |
1735 | /* |
1736 | * When copying small received packets, we only copy from the | |
1737 | * linear data part of the SKB, so we rely on this condition. | |
1738 | */ | |
1739 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
1740 | ||
1da177e4 LT |
1741 | ret = ipoib_register_debugfs(); |
1742 | if (ret) | |
1743 | return ret; | |
1744 | ||
1745 | /* | |
1746 | * We create our own workqueue mainly because we want to be | |
1747 | * able to flush it when devices are being removed. We can't | |
1748 | * use schedule_work()/flush_scheduled_work() because both | |
1749 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1750 | * so flush_scheduled_work() can deadlock during device | |
1751 | * removal. | |
1752 | */ | |
1753 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1754 | if (!ipoib_workqueue) { | |
1755 | ret = -ENOMEM; | |
1756 | goto err_fs; | |
1757 | } | |
1758 | ||
c1a0b23b MT |
1759 | ib_sa_register_client(&ipoib_sa_client); |
1760 | ||
1da177e4 LT |
1761 | ret = ib_register_client(&ipoib_client); |
1762 | if (ret) | |
c1a0b23b | 1763 | goto err_sa; |
1da177e4 | 1764 | |
9baa0b03 OG |
1765 | ret = ipoib_netlink_init(); |
1766 | if (ret) | |
1767 | goto err_client; | |
1768 | ||
1da177e4 LT |
1769 | return 0; |
1770 | ||
9baa0b03 OG |
1771 | err_client: |
1772 | ib_unregister_client(&ipoib_client); | |
1773 | ||
c1a0b23b MT |
1774 | err_sa: |
1775 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1776 | destroy_workqueue(ipoib_workqueue); |
1777 | ||
9adec1a8 RD |
1778 | err_fs: |
1779 | ipoib_unregister_debugfs(); | |
1780 | ||
1da177e4 LT |
1781 | return ret; |
1782 | } | |
1783 | ||
1784 | static void __exit ipoib_cleanup_module(void) | |
1785 | { | |
9baa0b03 | 1786 | ipoib_netlink_fini(); |
1da177e4 | 1787 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1788 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1789 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1790 | destroy_workqueue(ipoib_workqueue); |
1791 | } | |
1792 | ||
1793 | module_init(ipoib_init_module); | |
1794 | module_exit(ipoib_cleanup_module); |