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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. | |
33 | * | |
34 | * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $ | |
35 | */ | |
36 | ||
37 | #include "ipoib.h" | |
38 | ||
1da177e4 LT |
39 | #include <linux/module.h> |
40 | ||
41 | #include <linux/init.h> | |
42 | #include <linux/slab.h> | |
0f485251 | 43 | #include <linux/kernel.h> |
1da177e4 LT |
44 | |
45 | #include <linux/if_arp.h> /* For ARPHRD_xxx */ | |
46 | ||
47 | #include <linux/ip.h> | |
48 | #include <linux/in.h> | |
49 | ||
14c85021 ACM |
50 | #include <net/dst.h> |
51 | ||
1da177e4 LT |
52 | MODULE_AUTHOR("Roland Dreier"); |
53 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
0f485251 SM |
56 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
57 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
58 | ||
59 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
60 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
61 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
62 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
63 | ||
1da177e4 LT |
64 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
65 | int ipoib_debug_level; | |
66 | ||
67 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
68 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
69 | #endif | |
70 | ||
1732b0ef RD |
71 | struct ipoib_path_iter { |
72 | struct net_device *dev; | |
73 | struct ipoib_path path; | |
74 | }; | |
75 | ||
1da177e4 LT |
76 | static const u8 ipv4_bcast_addr[] = { |
77 | 0x00, 0xff, 0xff, 0xff, | |
78 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
79 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
80 | }; | |
81 | ||
82 | struct workqueue_struct *ipoib_workqueue; | |
83 | ||
c1a0b23b MT |
84 | struct ib_sa_client ipoib_sa_client; |
85 | ||
1da177e4 LT |
86 | static void ipoib_add_one(struct ib_device *device); |
87 | static void ipoib_remove_one(struct ib_device *device); | |
88 | ||
89 | static struct ib_client ipoib_client = { | |
90 | .name = "ipoib", | |
91 | .add = ipoib_add_one, | |
92 | .remove = ipoib_remove_one | |
93 | }; | |
94 | ||
95 | int ipoib_open(struct net_device *dev) | |
96 | { | |
97 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
98 | ||
99 | ipoib_dbg(priv, "bringing up interface\n"); | |
100 | ||
101 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
102 | ||
103 | if (ipoib_pkey_dev_delay_open(dev)) | |
104 | return 0; | |
105 | ||
106 | if (ipoib_ib_dev_open(dev)) | |
107 | return -EINVAL; | |
108 | ||
267ee88e | 109 | if (ipoib_ib_dev_up(dev)) { |
26bbf13c | 110 | ipoib_ib_dev_stop(dev, 1); |
1da177e4 | 111 | return -EINVAL; |
267ee88e | 112 | } |
1da177e4 LT |
113 | |
114 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
115 | struct ipoib_dev_priv *cpriv; | |
116 | ||
117 | /* Bring up any child interfaces too */ | |
95ed644f | 118 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
119 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
120 | int flags; | |
121 | ||
122 | flags = cpriv->dev->flags; | |
123 | if (flags & IFF_UP) | |
124 | continue; | |
125 | ||
126 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
127 | } | |
95ed644f | 128 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
129 | } |
130 | ||
131 | netif_start_queue(dev); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static int ipoib_stop(struct net_device *dev) | |
137 | { | |
138 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
139 | ||
140 | ipoib_dbg(priv, "stopping interface\n"); | |
141 | ||
142 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
143 | ||
144 | netif_stop_queue(dev); | |
145 | ||
839fcaba MT |
146 | clear_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags); |
147 | ||
0b3ea082 JM |
148 | /* |
149 | * Now flush workqueue to make sure a scheduled task doesn't | |
150 | * bring our internal state back up. | |
151 | */ | |
152 | flush_workqueue(ipoib_workqueue); | |
153 | ||
154 | ipoib_ib_dev_down(dev, 1); | |
26bbf13c | 155 | ipoib_ib_dev_stop(dev, 1); |
1da177e4 LT |
156 | |
157 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
158 | struct ipoib_dev_priv *cpriv; | |
159 | ||
160 | /* Bring down any child interfaces too */ | |
95ed644f | 161 | mutex_lock(&priv->vlan_mutex); |
1da177e4 LT |
162 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
163 | int flags; | |
164 | ||
165 | flags = cpriv->dev->flags; | |
166 | if (!(flags & IFF_UP)) | |
167 | continue; | |
168 | ||
169 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
170 | } | |
95ed644f | 171 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
172 | } |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) | |
178 | { | |
179 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
180 | ||
839fcaba MT |
181 | /* dev->mtu > 2K ==> connected mode */ |
182 | if (ipoib_cm_admin_enabled(dev) && new_mtu <= IPOIB_CM_MTU) { | |
183 | if (new_mtu > priv->mcast_mtu) | |
184 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
185 | priv->mcast_mtu); | |
186 | dev->mtu = new_mtu; | |
187 | return 0; | |
188 | } | |
189 | ||
190 | if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN) { | |
1da177e4 | 191 | return -EINVAL; |
839fcaba | 192 | } |
1da177e4 LT |
193 | |
194 | priv->admin_mtu = new_mtu; | |
195 | ||
196 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
37c22a77 | 201 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
202 | { |
203 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
204 | struct rb_node *n = priv->path_tree.rb_node; | |
205 | struct ipoib_path *path; | |
206 | int ret; | |
207 | ||
208 | while (n) { | |
209 | path = rb_entry(n, struct ipoib_path, rb_node); | |
210 | ||
37c22a77 | 211 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
212 | sizeof (union ib_gid)); |
213 | ||
214 | if (ret < 0) | |
215 | n = n->rb_left; | |
216 | else if (ret > 0) | |
217 | n = n->rb_right; | |
218 | else | |
219 | return path; | |
220 | } | |
221 | ||
222 | return NULL; | |
223 | } | |
224 | ||
225 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
226 | { | |
227 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
228 | struct rb_node **n = &priv->path_tree.rb_node; | |
229 | struct rb_node *pn = NULL; | |
230 | struct ipoib_path *tpath; | |
231 | int ret; | |
232 | ||
233 | while (*n) { | |
234 | pn = *n; | |
235 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
236 | ||
237 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
238 | sizeof (union ib_gid)); | |
239 | if (ret < 0) | |
240 | n = &pn->rb_left; | |
241 | else if (ret > 0) | |
242 | n = &pn->rb_right; | |
243 | else | |
244 | return -EEXIST; | |
245 | } | |
246 | ||
247 | rb_link_node(&path->rb_node, pn, n); | |
248 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
249 | ||
250 | list_add_tail(&path->list, &priv->path_list); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
256 | { | |
257 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
258 | struct ipoib_neigh *neigh, *tn; | |
259 | struct sk_buff *skb; | |
260 | unsigned long flags; | |
261 | ||
262 | while ((skb = __skb_dequeue(&path->queue))) | |
263 | dev_kfree_skb_irq(skb); | |
264 | ||
265 | spin_lock_irqsave(&priv->lock, flags); | |
266 | ||
267 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { | |
268 | /* | |
269 | * It's safe to call ipoib_put_ah() inside priv->lock | |
270 | * here, because we know that path->ah will always | |
271 | * hold one more reference, so ipoib_put_ah() will | |
272 | * never do more than decrement the ref count. | |
273 | */ | |
274 | if (neigh->ah) | |
275 | ipoib_put_ah(neigh->ah); | |
d2e0655e | 276 | |
2745b5b7 | 277 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
278 | } |
279 | ||
280 | spin_unlock_irqrestore(&priv->lock, flags); | |
281 | ||
282 | if (path->ah) | |
283 | ipoib_put_ah(path->ah); | |
284 | ||
285 | kfree(path); | |
286 | } | |
287 | ||
1732b0ef RD |
288 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
289 | ||
290 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
291 | { | |
292 | struct ipoib_path_iter *iter; | |
293 | ||
294 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
295 | if (!iter) | |
296 | return NULL; | |
297 | ||
298 | iter->dev = dev; | |
299 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
300 | ||
301 | if (ipoib_path_iter_next(iter)) { | |
302 | kfree(iter); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | return iter; | |
307 | } | |
308 | ||
309 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
310 | { | |
311 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
312 | struct rb_node *n; | |
313 | struct ipoib_path *path; | |
314 | int ret = 1; | |
315 | ||
316 | spin_lock_irq(&priv->lock); | |
317 | ||
318 | n = rb_first(&priv->path_tree); | |
319 | ||
320 | while (n) { | |
321 | path = rb_entry(n, struct ipoib_path, rb_node); | |
322 | ||
323 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
324 | sizeof (union ib_gid)) < 0) { | |
325 | iter->path = *path; | |
326 | ret = 0; | |
327 | break; | |
328 | } | |
329 | ||
330 | n = rb_next(n); | |
331 | } | |
332 | ||
333 | spin_unlock_irq(&priv->lock); | |
334 | ||
335 | return ret; | |
336 | } | |
337 | ||
338 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
339 | struct ipoib_path *path) | |
340 | { | |
341 | *path = iter->path; | |
342 | } | |
343 | ||
344 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
345 | ||
1da177e4 LT |
346 | void ipoib_flush_paths(struct net_device *dev) |
347 | { | |
348 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
349 | struct ipoib_path *path, *tp; | |
350 | LIST_HEAD(remove_list); | |
1da177e4 | 351 | |
9217b27b MT |
352 | spin_lock_irq(&priv->tx_lock); |
353 | spin_lock(&priv->lock); | |
1da177e4 LT |
354 | |
355 | list_splice(&priv->path_list, &remove_list); | |
356 | INIT_LIST_HEAD(&priv->path_list); | |
357 | ||
358 | list_for_each_entry(path, &remove_list, list) | |
359 | rb_erase(&path->rb_node, &priv->path_tree); | |
360 | ||
1da177e4 LT |
361 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
362 | if (path->query) | |
363 | ib_sa_cancel_query(path->query_id, path->query); | |
9217b27b MT |
364 | spin_unlock(&priv->lock); |
365 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
366 | wait_for_completion(&path->done); |
367 | path_free(dev, path); | |
9217b27b MT |
368 | spin_lock_irq(&priv->tx_lock); |
369 | spin_lock(&priv->lock); | |
1da177e4 | 370 | } |
9217b27b MT |
371 | spin_unlock(&priv->lock); |
372 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
373 | } |
374 | ||
375 | static void path_rec_completion(int status, | |
376 | struct ib_sa_path_rec *pathrec, | |
377 | void *path_ptr) | |
378 | { | |
379 | struct ipoib_path *path = path_ptr; | |
380 | struct net_device *dev = path->dev; | |
381 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
382 | struct ipoib_ah *ah = NULL; | |
d04d01b1 | 383 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
384 | struct sk_buff_head skqueue; |
385 | struct sk_buff *skb; | |
386 | unsigned long flags; | |
387 | ||
843613b0 | 388 | if (!status) |
1da177e4 LT |
389 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n", |
390 | be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); | |
391 | else | |
392 | ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", | |
393 | status, IPOIB_GID_ARG(path->pathrec.dgid)); | |
394 | ||
395 | skb_queue_head_init(&skqueue); | |
396 | ||
397 | if (!status) { | |
46f1b3d7 SH |
398 | struct ib_ah_attr av; |
399 | ||
400 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
401 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
402 | } |
403 | ||
404 | spin_lock_irqsave(&priv->lock, flags); | |
405 | ||
406 | path->ah = ah; | |
407 | ||
408 | if (ah) { | |
409 | path->pathrec = *pathrec; | |
410 | ||
411 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", | |
412 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
413 | ||
414 | while ((skb = __skb_dequeue(&path->queue))) | |
415 | __skb_queue_tail(&skqueue, skb); | |
416 | ||
d04d01b1 | 417 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
1da177e4 LT |
418 | kref_get(&path->ah->ref); |
419 | neigh->ah = path->ah; | |
8a7f7521 MT |
420 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
421 | sizeof(union ib_gid)); | |
1da177e4 | 422 | |
839fcaba MT |
423 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
424 | if (!ipoib_cm_get(neigh)) | |
425 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
426 | path, | |
427 | neigh)); | |
428 | if (!ipoib_cm_get(neigh)) { | |
429 | list_del(&neigh->list); | |
430 | if (neigh->ah) | |
431 | ipoib_put_ah(neigh->ah); | |
432 | ipoib_neigh_free(dev, neigh); | |
433 | continue; | |
434 | } | |
435 | } | |
436 | ||
1da177e4 LT |
437 | while ((skb = __skb_dequeue(&neigh->queue))) |
438 | __skb_queue_tail(&skqueue, skb); | |
439 | } | |
5872a9fc | 440 | } |
1da177e4 | 441 | |
5872a9fc | 442 | path->query = NULL; |
1da177e4 LT |
443 | complete(&path->done); |
444 | ||
445 | spin_unlock_irqrestore(&priv->lock, flags); | |
446 | ||
447 | while ((skb = __skb_dequeue(&skqueue))) { | |
448 | skb->dev = dev; | |
449 | if (dev_queue_xmit(skb)) | |
450 | ipoib_warn(priv, "dev_queue_xmit failed " | |
451 | "to requeue packet\n"); | |
452 | } | |
453 | } | |
454 | ||
37c22a77 | 455 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
456 | { |
457 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
458 | struct ipoib_path *path; | |
459 | ||
21a38489 | 460 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
461 | if (!path) |
462 | return NULL; | |
463 | ||
21a38489 | 464 | path->dev = dev; |
1da177e4 LT |
465 | |
466 | skb_queue_head_init(&path->queue); | |
467 | ||
468 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 469 | |
37c22a77 | 470 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
81668838 SH |
471 | path->pathrec.sgid = priv->local_gid; |
472 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
473 | path->pathrec.numb_path = 1; | |
474 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
475 | |
476 | return path; | |
477 | } | |
478 | ||
479 | static int path_rec_start(struct net_device *dev, | |
480 | struct ipoib_path *path) | |
481 | { | |
482 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
483 | ||
484 | ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n", | |
485 | IPOIB_GID_ARG(path->pathrec.dgid)); | |
486 | ||
65c7edda RD |
487 | init_completion(&path->done); |
488 | ||
1da177e4 | 489 | path->query_id = |
c1a0b23b | 490 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
491 | &path->pathrec, |
492 | IB_SA_PATH_REC_DGID | | |
493 | IB_SA_PATH_REC_SGID | | |
494 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 495 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
496 | IB_SA_PATH_REC_PKEY, |
497 | 1000, GFP_ATOMIC, | |
498 | path_rec_completion, | |
499 | path, &path->query); | |
500 | if (path->query_id < 0) { | |
501 | ipoib_warn(priv, "ib_sa_path_rec_get failed\n"); | |
502 | path->query = NULL; | |
503 | return path->query_id; | |
504 | } | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) | |
510 | { | |
511 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
512 | struct ipoib_path *path; | |
513 | struct ipoib_neigh *neigh; | |
514 | ||
d2e0655e | 515 | neigh = ipoib_neigh_alloc(skb->dst->neighbour); |
1da177e4 LT |
516 | if (!neigh) { |
517 | ++priv->stats.tx_dropped; | |
518 | dev_kfree_skb_any(skb); | |
519 | return; | |
520 | } | |
521 | ||
1da177e4 LT |
522 | /* |
523 | * We can only be called from ipoib_start_xmit, so we're | |
524 | * inside tx_lock -- no need to save/restore flags. | |
525 | */ | |
526 | spin_lock(&priv->lock); | |
527 | ||
37c22a77 | 528 | path = __path_find(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 529 | if (!path) { |
37c22a77 | 530 | path = path_rec_create(dev, skb->dst->neighbour->ha + 4); |
1da177e4 | 531 | if (!path) |
d2e0655e | 532 | goto err_path; |
1da177e4 LT |
533 | |
534 | __path_add(dev, path); | |
535 | } | |
536 | ||
537 | list_add_tail(&neigh->list, &path->neigh_list); | |
538 | ||
47f7a071 | 539 | if (path->ah) { |
1da177e4 LT |
540 | kref_get(&path->ah->ref); |
541 | neigh->ah = path->ah; | |
8a7f7521 MT |
542 | memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, |
543 | sizeof(union ib_gid)); | |
1da177e4 | 544 | |
839fcaba MT |
545 | if (ipoib_cm_enabled(dev, neigh->neighbour)) { |
546 | if (!ipoib_cm_get(neigh)) | |
547 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
548 | if (!ipoib_cm_get(neigh)) { | |
549 | list_del(&neigh->list); | |
550 | if (neigh->ah) | |
551 | ipoib_put_ah(neigh->ah); | |
552 | ipoib_neigh_free(dev, neigh); | |
553 | goto err_drop; | |
554 | } | |
555 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
556 | __skb_queue_tail(&neigh->queue, skb); | |
557 | else { | |
558 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
559 | skb_queue_len(&neigh->queue)); | |
560 | goto err_drop; | |
561 | } | |
562 | } else | |
563 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha)); | |
1da177e4 LT |
564 | } else { |
565 | neigh->ah = NULL; | |
1da177e4 LT |
566 | |
567 | if (!path->query && path_rec_start(dev, path)) | |
d2e0655e | 568 | goto err_list; |
2745b5b7 MT |
569 | |
570 | __skb_queue_tail(&neigh->queue, skb); | |
1da177e4 LT |
571 | } |
572 | ||
573 | spin_unlock(&priv->lock); | |
574 | return; | |
575 | ||
d2e0655e | 576 | err_list: |
1da177e4 | 577 | list_del(&neigh->list); |
1da177e4 | 578 | |
d2e0655e | 579 | err_path: |
2745b5b7 | 580 | ipoib_neigh_free(dev, neigh); |
839fcaba | 581 | err_drop: |
1da177e4 LT |
582 | ++priv->stats.tx_dropped; |
583 | dev_kfree_skb_any(skb); | |
584 | ||
585 | spin_unlock(&priv->lock); | |
586 | } | |
587 | ||
d70ed607 | 588 | static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
589 | { |
590 | struct ipoib_dev_priv *priv = netdev_priv(skb->dev); | |
591 | ||
592 | /* Look up path record for unicasts */ | |
593 | if (skb->dst->neighbour->ha[4] != 0xff) { | |
594 | neigh_add_path(skb, dev); | |
595 | return; | |
596 | } | |
597 | ||
598 | /* Add in the P_Key for multicasts */ | |
599 | skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; | |
600 | skb->dst->neighbour->ha[9] = priv->pkey & 0xff; | |
37c22a77 | 601 | ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb); |
1da177e4 LT |
602 | } |
603 | ||
604 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
605 | struct ipoib_pseudoheader *phdr) | |
606 | { | |
607 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
608 | struct ipoib_path *path; | |
609 | ||
610 | /* | |
611 | * We can only be called from ipoib_start_xmit, so we're | |
612 | * inside tx_lock -- no need to save/restore flags. | |
613 | */ | |
614 | spin_lock(&priv->lock); | |
615 | ||
37c22a77 | 616 | path = __path_find(dev, phdr->hwaddr + 4); |
1da177e4 | 617 | if (!path) { |
37c22a77 | 618 | path = path_rec_create(dev, phdr->hwaddr + 4); |
1da177e4 LT |
619 | if (path) { |
620 | /* put pseudoheader back on for next time */ | |
621 | skb_push(skb, sizeof *phdr); | |
622 | __skb_queue_tail(&path->queue, skb); | |
623 | ||
624 | if (path_rec_start(dev, path)) { | |
625 | spin_unlock(&priv->lock); | |
626 | path_free(dev, path); | |
627 | return; | |
628 | } else | |
629 | __path_add(dev, path); | |
630 | } else { | |
631 | ++priv->stats.tx_dropped; | |
632 | dev_kfree_skb_any(skb); | |
633 | } | |
634 | ||
635 | spin_unlock(&priv->lock); | |
636 | return; | |
637 | } | |
638 | ||
47f7a071 | 639 | if (path->ah) { |
1da177e4 LT |
640 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
641 | be16_to_cpu(path->pathrec.dlid)); | |
642 | ||
073ae841 | 643 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); |
1da177e4 LT |
644 | } else if ((path->query || !path_rec_start(dev, path)) && |
645 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
646 | /* put pseudoheader back on for next time */ | |
647 | skb_push(skb, sizeof *phdr); | |
648 | __skb_queue_tail(&path->queue, skb); | |
649 | } else { | |
650 | ++priv->stats.tx_dropped; | |
651 | dev_kfree_skb_any(skb); | |
652 | } | |
653 | ||
654 | spin_unlock(&priv->lock); | |
655 | } | |
656 | ||
657 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
658 | { | |
659 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
660 | struct ipoib_neigh *neigh; | |
661 | unsigned long flags; | |
662 | ||
a8bfca02 | 663 | if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags))) |
1da177e4 | 664 | return NETDEV_TX_LOCKED; |
1da177e4 LT |
665 | |
666 | /* | |
667 | * Check if our queue is stopped. Since we have the LLTX bit | |
668 | * set, we can't rely on netif_stop_queue() preventing our | |
669 | * xmit function from being called with a full queue. | |
670 | */ | |
671 | if (unlikely(netif_queue_stopped(dev))) { | |
672 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
673 | return NETDEV_TX_BUSY; | |
674 | } | |
675 | ||
a8bfca02 | 676 | if (likely(skb->dst && skb->dst->neighbour)) { |
1da177e4 | 677 | if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { |
d70ed607 | 678 | ipoib_path_lookup(skb, dev); |
1da177e4 LT |
679 | goto out; |
680 | } | |
681 | ||
682 | neigh = *to_ipoib_neigh(skb->dst->neighbour); | |
683 | ||
839fcaba MT |
684 | if (ipoib_cm_get(neigh)) { |
685 | if (ipoib_cm_up(neigh)) { | |
686 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
687 | goto out; | |
688 | } | |
689 | } else if (neigh->ah) { | |
8a7f7521 MT |
690 | if (unlikely(memcmp(&neigh->dgid.raw, |
691 | skb->dst->neighbour->ha + 4, | |
692 | sizeof(union ib_gid)))) { | |
693 | spin_lock(&priv->lock); | |
694 | /* | |
695 | * It's safe to call ipoib_put_ah() inside | |
696 | * priv->lock here, because we know that | |
697 | * path->ah will always hold one more reference, | |
698 | * so ipoib_put_ah() will never do more than | |
699 | * decrement the ref count. | |
700 | */ | |
701 | ipoib_put_ah(neigh->ah); | |
702 | list_del(&neigh->list); | |
2745b5b7 | 703 | ipoib_neigh_free(dev, neigh); |
8a7f7521 MT |
704 | spin_unlock(&priv->lock); |
705 | ipoib_path_lookup(skb, dev); | |
706 | goto out; | |
707 | } | |
708 | ||
073ae841 | 709 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha)); |
1da177e4 LT |
710 | goto out; |
711 | } | |
712 | ||
713 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
714 | spin_lock(&priv->lock); | |
715 | __skb_queue_tail(&neigh->queue, skb); | |
716 | spin_unlock(&priv->lock); | |
717 | } else { | |
718 | ++priv->stats.tx_dropped; | |
719 | dev_kfree_skb_any(skb); | |
720 | } | |
721 | } else { | |
722 | struct ipoib_pseudoheader *phdr = | |
723 | (struct ipoib_pseudoheader *) skb->data; | |
724 | skb_pull(skb, sizeof *phdr); | |
725 | ||
726 | if (phdr->hwaddr[4] == 0xff) { | |
727 | /* Add in the P_Key for multicast*/ | |
728 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
729 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
730 | ||
37c22a77 | 731 | ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); |
1da177e4 | 732 | } else { |
0dca0f7b | 733 | /* unicast GID -- should be ARP or RARP reply */ |
1da177e4 | 734 | |
0dca0f7b HR |
735 | if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && |
736 | (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { | |
1da177e4 LT |
737 | ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x " |
738 | IPOIB_GID_FMT "\n", | |
739 | skb->dst ? "neigh" : "dst", | |
97f52eb4 | 740 | be16_to_cpup((__be16 *) skb->data), |
073ae841 | 741 | IPOIB_QPN(phdr->hwaddr), |
37c22a77 | 742 | IPOIB_GID_RAW_ARG(phdr->hwaddr + 4)); |
1da177e4 LT |
743 | dev_kfree_skb_any(skb); |
744 | ++priv->stats.tx_dropped; | |
745 | goto out; | |
746 | } | |
747 | ||
748 | unicast_arp_send(skb, dev, phdr); | |
749 | } | |
750 | } | |
751 | ||
752 | out: | |
753 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
754 | ||
755 | return NETDEV_TX_OK; | |
756 | } | |
757 | ||
758 | static struct net_device_stats *ipoib_get_stats(struct net_device *dev) | |
759 | { | |
760 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
761 | ||
762 | return &priv->stats; | |
763 | } | |
764 | ||
765 | static void ipoib_timeout(struct net_device *dev) | |
766 | { | |
767 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
768 | ||
4b2d319b RD |
769 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
770 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
771 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
772 | netif_queue_stopped(dev), | |
773 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
774 | /* XXX reset QP, etc. */ |
775 | } | |
776 | ||
777 | static int ipoib_hard_header(struct sk_buff *skb, | |
778 | struct net_device *dev, | |
779 | unsigned short type, | |
780 | void *daddr, void *saddr, unsigned len) | |
781 | { | |
782 | struct ipoib_header *header; | |
783 | ||
784 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
785 | ||
786 | header->proto = htons(type); | |
787 | header->reserved = 0; | |
788 | ||
789 | /* | |
790 | * If we don't have a neighbour structure, stuff the | |
791 | * destination address onto the front of the skb so we can | |
792 | * figure out where to send the packet later. | |
793 | */ | |
ef12d456 | 794 | if ((!skb->dst || !skb->dst->neighbour) && daddr) { |
1da177e4 LT |
795 | struct ipoib_pseudoheader *phdr = |
796 | (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); | |
797 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); | |
798 | } | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | static void ipoib_set_mcast_list(struct net_device *dev) | |
804 | { | |
805 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
806 | ||
7a343d4c LA |
807 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
808 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
809 | return; | |
810 | } | |
811 | ||
1ad62a19 | 812 | queue_work(ipoib_workqueue, &priv->restart_task); |
1da177e4 LT |
813 | } |
814 | ||
ecbb4169 | 815 | static void ipoib_neigh_cleanup(struct neighbour *n) |
1da177e4 LT |
816 | { |
817 | struct ipoib_neigh *neigh; | |
818 | struct ipoib_dev_priv *priv = netdev_priv(n->dev); | |
819 | unsigned long flags; | |
820 | struct ipoib_ah *ah = NULL; | |
821 | ||
822 | ipoib_dbg(priv, | |
ecbb4169 | 823 | "neigh_cleanup for %06x " IPOIB_GID_FMT "\n", |
073ae841 | 824 | IPOIB_QPN(n->ha), |
37c22a77 | 825 | IPOIB_GID_RAW_ARG(n->ha + 4)); |
1da177e4 LT |
826 | |
827 | spin_lock_irqsave(&priv->lock, flags); | |
828 | ||
829 | neigh = *to_ipoib_neigh(n); | |
830 | if (neigh) { | |
831 | if (neigh->ah) | |
832 | ah = neigh->ah; | |
833 | list_del(&neigh->list); | |
2745b5b7 | 834 | ipoib_neigh_free(n->dev, neigh); |
1da177e4 LT |
835 | } |
836 | ||
837 | spin_unlock_irqrestore(&priv->lock, flags); | |
838 | ||
839 | if (ah) | |
840 | ipoib_put_ah(ah); | |
841 | } | |
842 | ||
d2e0655e MT |
843 | struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour) |
844 | { | |
845 | struct ipoib_neigh *neigh; | |
846 | ||
847 | neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
848 | if (!neigh) | |
849 | return NULL; | |
850 | ||
851 | neigh->neighbour = neighbour; | |
852 | *to_ipoib_neigh(neighbour) = neigh; | |
82b39913 | 853 | skb_queue_head_init(&neigh->queue); |
839fcaba | 854 | ipoib_cm_set(neigh, NULL); |
d2e0655e MT |
855 | |
856 | return neigh; | |
857 | } | |
858 | ||
2745b5b7 | 859 | void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh) |
d2e0655e | 860 | { |
2745b5b7 MT |
861 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
862 | struct sk_buff *skb; | |
d2e0655e | 863 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
2745b5b7 MT |
864 | while ((skb = __skb_dequeue(&neigh->queue))) { |
865 | ++priv->stats.tx_dropped; | |
866 | dev_kfree_skb_any(skb); | |
867 | } | |
839fcaba MT |
868 | if (ipoib_cm_get(neigh)) |
869 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
d2e0655e MT |
870 | kfree(neigh); |
871 | } | |
872 | ||
1da177e4 LT |
873 | static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) |
874 | { | |
ecbb4169 | 875 | parms->neigh_cleanup = ipoib_neigh_cleanup; |
1da177e4 LT |
876 | |
877 | return 0; | |
878 | } | |
879 | ||
880 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
881 | { | |
882 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
883 | ||
884 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 885 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
886 | GFP_KERNEL); |
887 | if (!priv->rx_ring) { | |
888 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 889 | ca->name, ipoib_recvq_size); |
1da177e4 LT |
890 | goto out; |
891 | } | |
1da177e4 | 892 | |
0f485251 | 893 | priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, |
1da177e4 LT |
894 | GFP_KERNEL); |
895 | if (!priv->tx_ring) { | |
896 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 897 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
898 | goto out_rx_ring_cleanup; |
899 | } | |
1da177e4 LT |
900 | |
901 | /* priv->tx_head & tx_tail are already 0 */ | |
902 | ||
903 | if (ipoib_ib_dev_init(dev, ca, port)) | |
904 | goto out_tx_ring_cleanup; | |
905 | ||
906 | return 0; | |
907 | ||
908 | out_tx_ring_cleanup: | |
909 | kfree(priv->tx_ring); | |
910 | ||
911 | out_rx_ring_cleanup: | |
912 | kfree(priv->rx_ring); | |
913 | ||
914 | out: | |
915 | return -ENOMEM; | |
916 | } | |
917 | ||
918 | void ipoib_dev_cleanup(struct net_device *dev) | |
919 | { | |
920 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
921 | ||
1732b0ef | 922 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
923 | |
924 | /* Delete any child interfaces first */ | |
925 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
926 | unregister_netdev(cpriv->dev); | |
927 | ipoib_dev_cleanup(cpriv->dev); | |
928 | free_netdev(cpriv->dev); | |
929 | } | |
930 | ||
931 | ipoib_ib_dev_cleanup(dev); | |
932 | ||
92a6b34b HR |
933 | kfree(priv->rx_ring); |
934 | kfree(priv->tx_ring); | |
1da177e4 | 935 | |
92a6b34b HR |
936 | priv->rx_ring = NULL; |
937 | priv->tx_ring = NULL; | |
1da177e4 LT |
938 | } |
939 | ||
940 | static void ipoib_setup(struct net_device *dev) | |
941 | { | |
942 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
943 | ||
944 | dev->open = ipoib_open; | |
945 | dev->stop = ipoib_stop; | |
946 | dev->change_mtu = ipoib_change_mtu; | |
947 | dev->hard_start_xmit = ipoib_start_xmit; | |
948 | dev->get_stats = ipoib_get_stats; | |
949 | dev->tx_timeout = ipoib_timeout; | |
950 | dev->hard_header = ipoib_hard_header; | |
951 | dev->set_multicast_list = ipoib_set_mcast_list; | |
952 | dev->neigh_setup = ipoib_neigh_setup_dev; | |
8d1cc86a RD |
953 | dev->poll = ipoib_poll; |
954 | dev->weight = 100; | |
1da177e4 LT |
955 | |
956 | dev->watchdog_timeo = HZ; | |
957 | ||
1da177e4 LT |
958 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
959 | ||
960 | /* | |
961 | * We add in INFINIBAND_ALEN to allow for the destination | |
962 | * address "pseudoheader" for skbs without neighbour struct. | |
963 | */ | |
964 | dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; | |
965 | dev->addr_len = INFINIBAND_ALEN; | |
966 | dev->type = ARPHRD_INFINIBAND; | |
0f485251 | 967 | dev->tx_queue_len = ipoib_sendq_size * 2; |
1da177e4 LT |
968 | dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX; |
969 | ||
970 | /* MTU will be reset when mcast join happens */ | |
971 | dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; | |
972 | priv->mcast_mtu = priv->admin_mtu = dev->mtu; | |
973 | ||
974 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); | |
975 | ||
976 | netif_carrier_off(dev); | |
977 | ||
978 | SET_MODULE_OWNER(dev); | |
979 | ||
980 | priv->dev = dev; | |
981 | ||
982 | spin_lock_init(&priv->lock); | |
983 | spin_lock_init(&priv->tx_lock); | |
984 | ||
95ed644f IM |
985 | mutex_init(&priv->mcast_mutex); |
986 | mutex_init(&priv->vlan_mutex); | |
1da177e4 LT |
987 | |
988 | INIT_LIST_HEAD(&priv->path_list); | |
989 | INIT_LIST_HEAD(&priv->child_intfs); | |
990 | INIT_LIST_HEAD(&priv->dead_ahs); | |
991 | INIT_LIST_HEAD(&priv->multicast_list); | |
992 | ||
26bbf13c YE |
993 | INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); |
994 | INIT_WORK(&priv->pkey_event_task, ipoib_pkey_event); | |
c4028958 DH |
995 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
996 | INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush); | |
997 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); | |
998 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
1da177e4 LT |
999 | } |
1000 | ||
1001 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1002 | { | |
1003 | struct net_device *dev; | |
1004 | ||
1005 | dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, | |
1006 | ipoib_setup); | |
1007 | if (!dev) | |
1008 | return NULL; | |
1009 | ||
1010 | return netdev_priv(dev); | |
1011 | } | |
1012 | ||
43cb76d9 GKH |
1013 | static ssize_t show_pkey(struct device *dev, |
1014 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1015 | { |
43cb76d9 | 1016 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1017 | |
1018 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1019 | } | |
43cb76d9 | 1020 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1021 | |
335a64a5 OG |
1022 | static ssize_t show_umcast(struct device *dev, |
1023 | struct device_attribute *attr, char *buf) | |
1024 | { | |
1025 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1026 | ||
1027 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1028 | } | |
1029 | ||
1030 | static ssize_t set_umcast(struct device *dev, | |
1031 | struct device_attribute *attr, | |
1032 | const char *buf, size_t count) | |
1033 | { | |
1034 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1035 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1036 | ||
1037 | if (umcast_val > 0) { | |
1038 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1039 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1040 | "by userspace\n"); | |
1041 | } else | |
1042 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1043 | ||
1044 | return count; | |
1045 | } | |
1046 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1047 | ||
1048 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1049 | { | |
1050 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1051 | } | |
1052 | ||
43cb76d9 GKH |
1053 | static ssize_t create_child(struct device *dev, |
1054 | struct device_attribute *attr, | |
1da177e4 LT |
1055 | const char *buf, size_t count) |
1056 | { | |
1057 | int pkey; | |
1058 | int ret; | |
1059 | ||
1060 | if (sscanf(buf, "%i", &pkey) != 1) | |
1061 | return -EINVAL; | |
1062 | ||
1063 | if (pkey < 0 || pkey > 0xffff) | |
1064 | return -EINVAL; | |
1065 | ||
4ce05937 RD |
1066 | /* |
1067 | * Set the full membership bit, so that we join the right | |
1068 | * broadcast group, etc. | |
1069 | */ | |
1070 | pkey |= 0x8000; | |
1071 | ||
43cb76d9 | 1072 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1073 | |
1074 | return ret ? ret : count; | |
1075 | } | |
43cb76d9 | 1076 | static DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child); |
1da177e4 | 1077 | |
43cb76d9 GKH |
1078 | static ssize_t delete_child(struct device *dev, |
1079 | struct device_attribute *attr, | |
1da177e4 LT |
1080 | const char *buf, size_t count) |
1081 | { | |
1082 | int pkey; | |
1083 | int ret; | |
1084 | ||
1085 | if (sscanf(buf, "%i", &pkey) != 1) | |
1086 | return -EINVAL; | |
1087 | ||
1088 | if (pkey < 0 || pkey > 0xffff) | |
1089 | return -EINVAL; | |
1090 | ||
43cb76d9 | 1091 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1092 | |
1093 | return ret ? ret : count; | |
1094 | ||
1095 | } | |
43cb76d9 | 1096 | static DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child); |
1da177e4 LT |
1097 | |
1098 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1099 | { | |
43cb76d9 | 1100 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1101 | } |
1102 | ||
1103 | static struct net_device *ipoib_add_port(const char *format, | |
1104 | struct ib_device *hca, u8 port) | |
1105 | { | |
1106 | struct ipoib_dev_priv *priv; | |
1107 | int result = -ENOMEM; | |
1108 | ||
1109 | priv = ipoib_intf_alloc(format); | |
1110 | if (!priv) | |
1111 | goto alloc_mem_failed; | |
1112 | ||
1113 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
1114 | ||
1115 | result = ib_query_pkey(hca, port, 0, &priv->pkey); | |
1116 | if (result) { | |
1117 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1118 | hca->name, port, result); | |
ca6de177 | 1119 | goto device_init_failed; |
1da177e4 LT |
1120 | } |
1121 | ||
4ce05937 RD |
1122 | /* |
1123 | * Set the full membership bit, so that we join the right | |
1124 | * broadcast group, etc. | |
1125 | */ | |
1126 | priv->pkey |= 0x8000; | |
1127 | ||
1da177e4 LT |
1128 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1129 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1130 | ||
1131 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1132 | if (result) { | |
1133 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1134 | hca->name, port, result); | |
ca6de177 | 1135 | goto device_init_failed; |
1da177e4 LT |
1136 | } else |
1137 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1138 | ||
1139 | ||
1140 | result = ipoib_dev_init(priv->dev, hca, port); | |
1141 | if (result < 0) { | |
1142 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1143 | hca->name, port, result); | |
1144 | goto device_init_failed; | |
1145 | } | |
1146 | ||
1147 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1148 | priv->ca, ipoib_event); | |
1149 | result = ib_register_event_handler(&priv->event_handler); | |
1150 | if (result < 0) { | |
1151 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1152 | "port %d (ret = %d)\n", | |
1153 | hca->name, port, result); | |
1154 | goto event_failed; | |
1155 | } | |
1156 | ||
1157 | result = register_netdev(priv->dev); | |
1158 | if (result) { | |
1159 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1160 | hca->name, port, result); | |
1161 | goto register_failed; | |
1162 | } | |
1163 | ||
1732b0ef | 1164 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1165 | |
839fcaba MT |
1166 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1167 | goto sysfs_failed; | |
1da177e4 LT |
1168 | if (ipoib_add_pkey_attr(priv->dev)) |
1169 | goto sysfs_failed; | |
335a64a5 OG |
1170 | if (ipoib_add_umcast_attr(priv->dev)) |
1171 | goto sysfs_failed; | |
43cb76d9 | 1172 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1173 | goto sysfs_failed; |
43cb76d9 | 1174 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1175 | goto sysfs_failed; |
1176 | ||
1177 | return priv->dev; | |
1178 | ||
1179 | sysfs_failed: | |
1732b0ef | 1180 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1181 | unregister_netdev(priv->dev); |
1182 | ||
1183 | register_failed: | |
1184 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1185 | flush_scheduled_work(); |
1da177e4 LT |
1186 | |
1187 | event_failed: | |
1188 | ipoib_dev_cleanup(priv->dev); | |
1189 | ||
1190 | device_init_failed: | |
1191 | free_netdev(priv->dev); | |
1192 | ||
1193 | alloc_mem_failed: | |
1194 | return ERR_PTR(result); | |
1195 | } | |
1196 | ||
1197 | static void ipoib_add_one(struct ib_device *device) | |
1198 | { | |
1199 | struct list_head *dev_list; | |
1200 | struct net_device *dev; | |
1201 | struct ipoib_dev_priv *priv; | |
1202 | int s, e, p; | |
1203 | ||
07ebafba TT |
1204 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1205 | return; | |
1206 | ||
1da177e4 LT |
1207 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1208 | if (!dev_list) | |
1209 | return; | |
1210 | ||
1211 | INIT_LIST_HEAD(dev_list); | |
1212 | ||
07ebafba | 1213 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
1214 | s = 0; |
1215 | e = 0; | |
1216 | } else { | |
1217 | s = 1; | |
1218 | e = device->phys_port_cnt; | |
1219 | } | |
1220 | ||
1221 | for (p = s; p <= e; ++p) { | |
1222 | dev = ipoib_add_port("ib%d", device, p); | |
1223 | if (!IS_ERR(dev)) { | |
1224 | priv = netdev_priv(dev); | |
1225 | list_add_tail(&priv->list, dev_list); | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | ib_set_client_data(device, &ipoib_client, dev_list); | |
1230 | } | |
1231 | ||
1232 | static void ipoib_remove_one(struct ib_device *device) | |
1233 | { | |
1234 | struct ipoib_dev_priv *priv, *tmp; | |
1235 | struct list_head *dev_list; | |
1236 | ||
07ebafba TT |
1237 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
1238 | return; | |
1239 | ||
1da177e4 LT |
1240 | dev_list = ib_get_client_data(device, &ipoib_client); |
1241 | ||
1242 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1243 | ib_unregister_event_handler(&priv->event_handler); | |
51574e03 | 1244 | flush_scheduled_work(); |
1da177e4 LT |
1245 | |
1246 | unregister_netdev(priv->dev); | |
1247 | ipoib_dev_cleanup(priv->dev); | |
1248 | free_netdev(priv->dev); | |
1249 | } | |
06c56e44 MT |
1250 | |
1251 | kfree(dev_list); | |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | static int __init ipoib_init_module(void) | |
1255 | { | |
1256 | int ret; | |
1257 | ||
0f485251 SM |
1258 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1259 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1260 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1261 | ||
1262 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1263 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
1264 | ipoib_sendq_size = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE); | |
1265 | ||
1da177e4 LT |
1266 | ret = ipoib_register_debugfs(); |
1267 | if (ret) | |
1268 | return ret; | |
1269 | ||
1270 | /* | |
1271 | * We create our own workqueue mainly because we want to be | |
1272 | * able to flush it when devices are being removed. We can't | |
1273 | * use schedule_work()/flush_scheduled_work() because both | |
1274 | * unregister_netdev() and linkwatch_event take the rtnl lock, | |
1275 | * so flush_scheduled_work() can deadlock during device | |
1276 | * removal. | |
1277 | */ | |
1278 | ipoib_workqueue = create_singlethread_workqueue("ipoib"); | |
1279 | if (!ipoib_workqueue) { | |
1280 | ret = -ENOMEM; | |
1281 | goto err_fs; | |
1282 | } | |
1283 | ||
c1a0b23b MT |
1284 | ib_sa_register_client(&ipoib_sa_client); |
1285 | ||
1da177e4 LT |
1286 | ret = ib_register_client(&ipoib_client); |
1287 | if (ret) | |
c1a0b23b | 1288 | goto err_sa; |
1da177e4 LT |
1289 | |
1290 | return 0; | |
1291 | ||
c1a0b23b MT |
1292 | err_sa: |
1293 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
1294 | destroy_workqueue(ipoib_workqueue); |
1295 | ||
9adec1a8 RD |
1296 | err_fs: |
1297 | ipoib_unregister_debugfs(); | |
1298 | ||
1da177e4 LT |
1299 | return ret; |
1300 | } | |
1301 | ||
1302 | static void __exit ipoib_cleanup_module(void) | |
1303 | { | |
1da177e4 | 1304 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 1305 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 1306 | ipoib_unregister_debugfs(); |
1da177e4 LT |
1307 | destroy_workqueue(ipoib_workqueue); |
1308 | } | |
1309 | ||
1310 | module_init(ipoib_init_module); | |
1311 | module_exit(ipoib_cleanup_module); |