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> | |
ddde896e GS |
51 | #include <net/addrconf.h> |
52 | #include <linux/inetdevice.h> | |
53 | #include <rdma/ib_cache.h> | |
14c85021 | 54 | |
4b48680b YB |
55 | #define DRV_VERSION "1.0.0" |
56 | ||
57 | const char ipoib_driver_version[] = DRV_VERSION; | |
58 | ||
1da177e4 LT |
59 | MODULE_AUTHOR("Roland Dreier"); |
60 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
61 | MODULE_LICENSE("Dual BSD/GPL"); | |
4b48680b | 62 | MODULE_VERSION(DRV_VERSION); |
1da177e4 | 63 | |
0f485251 SM |
64 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
65 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
66 | ||
67 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
68 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
69 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
70 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
71 | ||
1da177e4 LT |
72 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
73 | int ipoib_debug_level; | |
74 | ||
75 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
76 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
77 | #endif | |
78 | ||
1732b0ef RD |
79 | struct ipoib_path_iter { |
80 | struct net_device *dev; | |
81 | struct ipoib_path path; | |
82 | }; | |
83 | ||
1da177e4 LT |
84 | static const u8 ipv4_bcast_addr[] = { |
85 | 0x00, 0xff, 0xff, 0xff, | |
86 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
87 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
88 | }; | |
89 | ||
90 | struct workqueue_struct *ipoib_workqueue; | |
91 | ||
c1a0b23b MT |
92 | struct ib_sa_client ipoib_sa_client; |
93 | ||
1da177e4 | 94 | static void ipoib_add_one(struct ib_device *device); |
7c1eb45a | 95 | static void ipoib_remove_one(struct ib_device *device, void *client_data); |
b63b70d8 | 96 | static void ipoib_neigh_reclaim(struct rcu_head *rp); |
ddde896e GS |
97 | static struct net_device *ipoib_get_net_dev_by_params( |
98 | struct ib_device *dev, u8 port, u16 pkey, | |
99 | const union ib_gid *gid, const struct sockaddr *addr, | |
100 | void *client_data); | |
1da177e4 LT |
101 | |
102 | static struct ib_client ipoib_client = { | |
103 | .name = "ipoib", | |
104 | .add = ipoib_add_one, | |
ddde896e GS |
105 | .remove = ipoib_remove_one, |
106 | .get_net_dev_by_params = ipoib_get_net_dev_by_params, | |
1da177e4 LT |
107 | }; |
108 | ||
109 | int ipoib_open(struct net_device *dev) | |
110 | { | |
111 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
112 | ||
113 | ipoib_dbg(priv, "bringing up interface\n"); | |
114 | ||
437708c4 MS |
115 | netif_carrier_off(dev); |
116 | ||
e028cc55 | 117 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
1da177e4 | 118 | |
efc82eee | 119 | if (ipoib_ib_dev_open(dev)) { |
dd57c930 AE |
120 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) |
121 | return 0; | |
b8a1b1ce | 122 | goto err_disable; |
dd57c930 | 123 | } |
fe25c561 | 124 | |
b8a1b1ce RD |
125 | if (ipoib_ib_dev_up(dev)) |
126 | goto err_stop; | |
1da177e4 LT |
127 | |
128 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
129 | struct ipoib_dev_priv *cpriv; | |
130 | ||
131 | /* Bring up any child interfaces too */ | |
f47944cc | 132 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
133 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
134 | int flags; | |
135 | ||
136 | flags = cpriv->dev->flags; | |
137 | if (flags & IFF_UP) | |
138 | continue; | |
139 | ||
140 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
141 | } | |
f47944cc | 142 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
143 | } |
144 | ||
145 | netif_start_queue(dev); | |
146 | ||
147 | return 0; | |
b8a1b1ce RD |
148 | |
149 | err_stop: | |
efc82eee | 150 | ipoib_ib_dev_stop(dev); |
b8a1b1ce RD |
151 | |
152 | err_disable: | |
b8a1b1ce RD |
153 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
154 | ||
155 | return -EINVAL; | |
1da177e4 LT |
156 | } |
157 | ||
158 | static int ipoib_stop(struct net_device *dev) | |
159 | { | |
160 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
161 | ||
162 | ipoib_dbg(priv, "stopping interface\n"); | |
163 | ||
164 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
165 | ||
166 | netif_stop_queue(dev); | |
167 | ||
efc82eee DL |
168 | ipoib_ib_dev_down(dev); |
169 | ipoib_ib_dev_stop(dev); | |
1da177e4 LT |
170 | |
171 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
172 | struct ipoib_dev_priv *cpriv; | |
173 | ||
174 | /* Bring down any child interfaces too */ | |
f47944cc | 175 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
176 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
177 | int flags; | |
178 | ||
179 | flags = cpriv->dev->flags; | |
180 | if (!(flags & IFF_UP)) | |
181 | continue; | |
182 | ||
183 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
184 | } | |
f47944cc | 185 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
186 | } |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
9baa0b03 OG |
191 | static void ipoib_uninit(struct net_device *dev) |
192 | { | |
193 | ipoib_dev_cleanup(dev); | |
194 | } | |
195 | ||
9ca36f7d | 196 | static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features) |
3d96c74d MM |
197 | { |
198 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
199 | ||
200 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
c4268778 | 201 | features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); |
3d96c74d MM |
202 | |
203 | return features; | |
204 | } | |
205 | ||
1da177e4 LT |
206 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
207 | { | |
208 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
209 | ||
839fcaba | 210 | /* dev->mtu > 2K ==> connected mode */ |
586a6934 PS |
211 | if (ipoib_cm_admin_enabled(dev)) { |
212 | if (new_mtu > ipoib_cm_max_mtu(dev)) | |
213 | return -EINVAL; | |
214 | ||
839fcaba MT |
215 | if (new_mtu > priv->mcast_mtu) |
216 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
217 | priv->mcast_mtu); | |
586a6934 | 218 | |
839fcaba MT |
219 | dev->mtu = new_mtu; |
220 | return 0; | |
221 | } | |
222 | ||
bc7b3a36 | 223 | if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) |
1da177e4 LT |
224 | return -EINVAL; |
225 | ||
226 | priv->admin_mtu = new_mtu; | |
227 | ||
228 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
ddde896e GS |
233 | /* Called with an RCU read lock taken */ |
234 | static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr, | |
235 | struct net_device *dev) | |
236 | { | |
237 | struct net *net = dev_net(dev); | |
238 | struct in_device *in_dev; | |
239 | struct sockaddr_in *addr_in = (struct sockaddr_in *)addr; | |
240 | struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr; | |
241 | __be32 ret_addr; | |
242 | ||
243 | switch (addr->sa_family) { | |
244 | case AF_INET: | |
245 | in_dev = in_dev_get(dev); | |
246 | if (!in_dev) | |
247 | return false; | |
248 | ||
249 | ret_addr = inet_confirm_addr(net, in_dev, 0, | |
250 | addr_in->sin_addr.s_addr, | |
251 | RT_SCOPE_HOST); | |
252 | in_dev_put(in_dev); | |
253 | if (ret_addr) | |
254 | return true; | |
255 | ||
256 | break; | |
257 | case AF_INET6: | |
258 | if (IS_ENABLED(CONFIG_IPV6) && | |
259 | ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1)) | |
260 | return true; | |
261 | ||
262 | break; | |
263 | } | |
264 | return false; | |
265 | } | |
266 | ||
267 | /** | |
268 | * Find the master net_device on top of the given net_device. | |
269 | * @dev: base IPoIB net_device | |
270 | * | |
271 | * Returns the master net_device with a reference held, or the same net_device | |
272 | * if no master exists. | |
273 | */ | |
274 | static struct net_device *ipoib_get_master_net_dev(struct net_device *dev) | |
275 | { | |
276 | struct net_device *master; | |
277 | ||
278 | rcu_read_lock(); | |
279 | master = netdev_master_upper_dev_get_rcu(dev); | |
280 | if (master) | |
281 | dev_hold(master); | |
282 | rcu_read_unlock(); | |
283 | ||
284 | if (master) | |
285 | return master; | |
286 | ||
287 | dev_hold(dev); | |
288 | return dev; | |
289 | } | |
290 | ||
291 | /** | |
292 | * Find a net_device matching the given address, which is an upper device of | |
293 | * the given net_device. | |
294 | * @addr: IP address to look for. | |
295 | * @dev: base IPoIB net_device | |
296 | * | |
297 | * If found, returns the net_device with a reference held. Otherwise return | |
298 | * NULL. | |
299 | */ | |
300 | static struct net_device *ipoib_get_net_dev_match_addr( | |
301 | const struct sockaddr *addr, struct net_device *dev) | |
302 | { | |
303 | struct net_device *upper, | |
304 | *result = NULL; | |
305 | struct list_head *iter; | |
306 | ||
307 | rcu_read_lock(); | |
308 | if (ipoib_is_dev_match_addr_rcu(addr, dev)) { | |
309 | dev_hold(dev); | |
310 | result = dev; | |
311 | goto out; | |
312 | } | |
313 | ||
314 | netdev_for_each_all_upper_dev_rcu(dev, upper, iter) { | |
315 | if (ipoib_is_dev_match_addr_rcu(addr, upper)) { | |
316 | dev_hold(upper); | |
317 | result = upper; | |
318 | break; | |
319 | } | |
320 | } | |
321 | out: | |
322 | rcu_read_unlock(); | |
323 | return result; | |
324 | } | |
325 | ||
326 | /* returns the number of IPoIB netdevs on top a given ipoib device matching a | |
327 | * pkey_index and address, if one exists. | |
328 | * | |
329 | * @found_net_dev: contains a matching net_device if the return value >= 1, | |
330 | * with a reference held. */ | |
331 | static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv, | |
332 | const union ib_gid *gid, | |
333 | u16 pkey_index, | |
334 | const struct sockaddr *addr, | |
335 | int nesting, | |
336 | struct net_device **found_net_dev) | |
337 | { | |
338 | struct ipoib_dev_priv *child_priv; | |
339 | struct net_device *net_dev = NULL; | |
340 | int matches = 0; | |
341 | ||
342 | if (priv->pkey_index == pkey_index && | |
343 | (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) { | |
344 | if (!addr) { | |
345 | net_dev = ipoib_get_master_net_dev(priv->dev); | |
346 | } else { | |
347 | /* Verify the net_device matches the IP address, as | |
348 | * IPoIB child devices currently share a GID. */ | |
349 | net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev); | |
350 | } | |
351 | if (net_dev) { | |
352 | if (!*found_net_dev) | |
353 | *found_net_dev = net_dev; | |
354 | else | |
355 | dev_put(net_dev); | |
356 | ++matches; | |
357 | } | |
358 | } | |
359 | ||
360 | /* Check child interfaces */ | |
361 | down_read_nested(&priv->vlan_rwsem, nesting); | |
362 | list_for_each_entry(child_priv, &priv->child_intfs, list) { | |
363 | matches += ipoib_match_gid_pkey_addr(child_priv, gid, | |
364 | pkey_index, addr, | |
365 | nesting + 1, | |
366 | found_net_dev); | |
367 | if (matches > 1) | |
368 | break; | |
369 | } | |
370 | up_read(&priv->vlan_rwsem); | |
371 | ||
372 | return matches; | |
373 | } | |
374 | ||
375 | /* Returns the number of matching net_devs found (between 0 and 2). Also | |
376 | * return the matching net_device in the @net_dev parameter, holding a | |
377 | * reference to the net_device, if the number of matches >= 1 */ | |
378 | static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port, | |
379 | u16 pkey_index, | |
380 | const union ib_gid *gid, | |
381 | const struct sockaddr *addr, | |
382 | struct net_device **net_dev) | |
383 | { | |
384 | struct ipoib_dev_priv *priv; | |
385 | int matches = 0; | |
386 | ||
387 | *net_dev = NULL; | |
388 | ||
389 | list_for_each_entry(priv, dev_list, list) { | |
390 | if (priv->port != port) | |
391 | continue; | |
392 | ||
393 | matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index, | |
394 | addr, 0, net_dev); | |
395 | if (matches > 1) | |
396 | break; | |
397 | } | |
398 | ||
399 | return matches; | |
400 | } | |
401 | ||
402 | static struct net_device *ipoib_get_net_dev_by_params( | |
403 | struct ib_device *dev, u8 port, u16 pkey, | |
404 | const union ib_gid *gid, const struct sockaddr *addr, | |
405 | void *client_data) | |
406 | { | |
407 | struct net_device *net_dev; | |
408 | struct list_head *dev_list = client_data; | |
409 | u16 pkey_index; | |
410 | int matches; | |
411 | int ret; | |
412 | ||
413 | if (!rdma_protocol_ib(dev, port)) | |
414 | return NULL; | |
415 | ||
416 | ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index); | |
417 | if (ret) | |
418 | return NULL; | |
419 | ||
420 | if (!dev_list) | |
421 | return NULL; | |
422 | ||
423 | /* See if we can find a unique device matching the L2 parameters */ | |
424 | matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, | |
425 | gid, NULL, &net_dev); | |
426 | ||
427 | switch (matches) { | |
428 | case 0: | |
429 | return NULL; | |
430 | case 1: | |
431 | return net_dev; | |
432 | } | |
433 | ||
434 | dev_put(net_dev); | |
435 | ||
436 | /* Couldn't find a unique device with L2 parameters only. Use L3 | |
437 | * address to uniquely match the net device */ | |
438 | matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, | |
439 | gid, addr, &net_dev); | |
440 | switch (matches) { | |
441 | case 0: | |
442 | return NULL; | |
443 | default: | |
444 | dev_warn_ratelimited(&dev->dev, | |
445 | "duplicate IP address detected\n"); | |
446 | /* Fall through */ | |
447 | case 1: | |
448 | return net_dev; | |
449 | } | |
450 | } | |
451 | ||
71d9c5f9 RD |
452 | int ipoib_set_mode(struct net_device *dev, const char *buf) |
453 | { | |
454 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
455 | ||
456 | /* flush paths if we switch modes so that connections are restarted */ | |
457 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { | |
458 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
459 | ipoib_warn(priv, "enabling connected mode " | |
460 | "will cause multicast packet drops\n"); | |
461 | netdev_update_features(dev); | |
edcd2a74 | 462 | dev_set_mtu(dev, ipoib_cm_max_mtu(dev)); |
71d9c5f9 RD |
463 | rtnl_unlock(); |
464 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; | |
465 | ||
466 | ipoib_flush_paths(dev); | |
467 | rtnl_lock(); | |
468 | return 0; | |
469 | } | |
470 | ||
471 | if (!strcmp(buf, "datagram\n")) { | |
472 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
473 | netdev_update_features(dev); | |
474 | dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); | |
475 | rtnl_unlock(); | |
476 | ipoib_flush_paths(dev); | |
477 | rtnl_lock(); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | return -EINVAL; | |
482 | } | |
483 | ||
37c22a77 | 484 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
485 | { |
486 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
487 | struct rb_node *n = priv->path_tree.rb_node; | |
488 | struct ipoib_path *path; | |
489 | int ret; | |
490 | ||
491 | while (n) { | |
492 | path = rb_entry(n, struct ipoib_path, rb_node); | |
493 | ||
37c22a77 | 494 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
495 | sizeof (union ib_gid)); |
496 | ||
497 | if (ret < 0) | |
498 | n = n->rb_left; | |
499 | else if (ret > 0) | |
500 | n = n->rb_right; | |
501 | else | |
502 | return path; | |
503 | } | |
504 | ||
505 | return NULL; | |
506 | } | |
507 | ||
508 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
509 | { | |
510 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
511 | struct rb_node **n = &priv->path_tree.rb_node; | |
512 | struct rb_node *pn = NULL; | |
513 | struct ipoib_path *tpath; | |
514 | int ret; | |
515 | ||
516 | while (*n) { | |
517 | pn = *n; | |
518 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
519 | ||
520 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
521 | sizeof (union ib_gid)); | |
522 | if (ret < 0) | |
523 | n = &pn->rb_left; | |
524 | else if (ret > 0) | |
525 | n = &pn->rb_right; | |
526 | else | |
527 | return -EEXIST; | |
528 | } | |
529 | ||
530 | rb_link_node(&path->rb_node, pn, n); | |
531 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
532 | ||
533 | list_add_tail(&path->list, &priv->path_list); | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
538 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
539 | { | |
1da177e4 | 540 | struct sk_buff *skb; |
1da177e4 LT |
541 | |
542 | while ((skb = __skb_dequeue(&path->queue))) | |
543 | dev_kfree_skb_irq(skb); | |
544 | ||
b63b70d8 | 545 | ipoib_dbg(netdev_priv(dev), "path_free\n"); |
1da177e4 | 546 | |
b63b70d8 SP |
547 | /* remove all neigh connected to this path */ |
548 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
1da177e4 LT |
549 | |
550 | if (path->ah) | |
551 | ipoib_put_ah(path->ah); | |
552 | ||
553 | kfree(path); | |
554 | } | |
555 | ||
1732b0ef RD |
556 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
557 | ||
558 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
559 | { | |
560 | struct ipoib_path_iter *iter; | |
561 | ||
562 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
563 | if (!iter) | |
564 | return NULL; | |
565 | ||
566 | iter->dev = dev; | |
567 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
568 | ||
569 | if (ipoib_path_iter_next(iter)) { | |
570 | kfree(iter); | |
571 | return NULL; | |
572 | } | |
573 | ||
574 | return iter; | |
575 | } | |
576 | ||
577 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
578 | { | |
579 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
580 | struct rb_node *n; | |
581 | struct ipoib_path *path; | |
582 | int ret = 1; | |
583 | ||
584 | spin_lock_irq(&priv->lock); | |
585 | ||
586 | n = rb_first(&priv->path_tree); | |
587 | ||
588 | while (n) { | |
589 | path = rb_entry(n, struct ipoib_path, rb_node); | |
590 | ||
591 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
592 | sizeof (union ib_gid)) < 0) { | |
593 | iter->path = *path; | |
594 | ret = 0; | |
595 | break; | |
596 | } | |
597 | ||
598 | n = rb_next(n); | |
599 | } | |
600 | ||
601 | spin_unlock_irq(&priv->lock); | |
602 | ||
603 | return ret; | |
604 | } | |
605 | ||
606 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
607 | struct ipoib_path *path) | |
608 | { | |
609 | *path = iter->path; | |
610 | } | |
611 | ||
612 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
613 | ||
ee1e2c82 MS |
614 | void ipoib_mark_paths_invalid(struct net_device *dev) |
615 | { | |
616 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
617 | struct ipoib_path *path, *tp; | |
618 | ||
619 | spin_lock_irq(&priv->lock); | |
620 | ||
621 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
5b095d98 | 622 | ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", |
ee1e2c82 | 623 | be16_to_cpu(path->pathrec.dlid), |
fcace2fe | 624 | path->pathrec.dgid.raw); |
ee1e2c82 MS |
625 | path->valid = 0; |
626 | } | |
627 | ||
628 | spin_unlock_irq(&priv->lock); | |
629 | } | |
630 | ||
1da177e4 LT |
631 | void ipoib_flush_paths(struct net_device *dev) |
632 | { | |
633 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
634 | struct ipoib_path *path, *tp; | |
635 | LIST_HEAD(remove_list); | |
943c246e | 636 | unsigned long flags; |
1da177e4 | 637 | |
943c246e RD |
638 | netif_tx_lock_bh(dev); |
639 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 640 | |
157de229 | 641 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
642 | |
643 | list_for_each_entry(path, &remove_list, list) | |
644 | rb_erase(&path->rb_node, &priv->path_tree); | |
645 | ||
1da177e4 LT |
646 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
647 | if (path->query) | |
648 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
649 | spin_unlock_irqrestore(&priv->lock, flags); |
650 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
651 | wait_for_completion(&path->done); |
652 | path_free(dev, path); | |
943c246e RD |
653 | netif_tx_lock_bh(dev); |
654 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 655 | } |
943c246e RD |
656 | |
657 | spin_unlock_irqrestore(&priv->lock, flags); | |
658 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
659 | } |
660 | ||
661 | static void path_rec_completion(int status, | |
662 | struct ib_sa_path_rec *pathrec, | |
663 | void *path_ptr) | |
664 | { | |
665 | struct ipoib_path *path = path_ptr; | |
666 | struct net_device *dev = path->dev; | |
667 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
668 | struct ipoib_ah *ah = NULL; | |
c9da4bad | 669 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 670 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
671 | struct sk_buff_head skqueue; |
672 | struct sk_buff *skb; | |
673 | unsigned long flags; | |
674 | ||
843613b0 | 675 | if (!status) |
5b095d98 | 676 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
fcace2fe | 677 | be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); |
1da177e4 | 678 | else |
5b095d98 | 679 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 680 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
681 | |
682 | skb_queue_head_init(&skqueue); | |
683 | ||
684 | if (!status) { | |
46f1b3d7 SH |
685 | struct ib_ah_attr av; |
686 | ||
687 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
688 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
689 | } |
690 | ||
691 | spin_lock_irqsave(&priv->lock, flags); | |
692 | ||
3874397c | 693 | if (!IS_ERR_OR_NULL(ah)) { |
1da177e4 LT |
694 | path->pathrec = *pathrec; |
695 | ||
c9da4bad RD |
696 | old_ah = path->ah; |
697 | path->ah = ah; | |
698 | ||
1da177e4 LT |
699 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
700 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
701 | ||
702 | while ((skb = __skb_dequeue(&path->queue))) | |
703 | __skb_queue_tail(&skqueue, skb); | |
704 | ||
d04d01b1 | 705 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
706 | if (neigh->ah) { |
707 | WARN_ON(neigh->ah != old_ah); | |
708 | /* | |
709 | * Dropping the ah reference inside | |
710 | * priv->lock is safe here, because we | |
711 | * will hold one more reference from | |
712 | * the original value of path->ah (ie | |
713 | * old_ah). | |
714 | */ | |
715 | ipoib_put_ah(neigh->ah); | |
716 | } | |
1da177e4 LT |
717 | kref_get(&path->ah->ref); |
718 | neigh->ah = path->ah; | |
719 | ||
b63b70d8 | 720 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
721 | if (!ipoib_cm_get(neigh)) |
722 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
723 | path, | |
724 | neigh)); | |
725 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 726 | ipoib_neigh_free(neigh); |
839fcaba MT |
727 | continue; |
728 | } | |
729 | } | |
730 | ||
1da177e4 LT |
731 | while ((skb = __skb_dequeue(&neigh->queue))) |
732 | __skb_queue_tail(&skqueue, skb); | |
733 | } | |
ee1e2c82 | 734 | path->valid = 1; |
5872a9fc | 735 | } |
1da177e4 | 736 | |
5872a9fc | 737 | path->query = NULL; |
1da177e4 LT |
738 | complete(&path->done); |
739 | ||
740 | spin_unlock_irqrestore(&priv->lock, flags); | |
741 | ||
f72dd566 RD |
742 | if (IS_ERR_OR_NULL(ah)) |
743 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
744 | ||
ee1e2c82 MS |
745 | if (old_ah) |
746 | ipoib_put_ah(old_ah); | |
747 | ||
1da177e4 LT |
748 | while ((skb = __skb_dequeue(&skqueue))) { |
749 | skb->dev = dev; | |
750 | if (dev_queue_xmit(skb)) | |
751 | ipoib_warn(priv, "dev_queue_xmit failed " | |
752 | "to requeue packet\n"); | |
753 | } | |
754 | } | |
755 | ||
37c22a77 | 756 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
757 | { |
758 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
759 | struct ipoib_path *path; | |
760 | ||
1401b53a JM |
761 | if (!priv->broadcast) |
762 | return NULL; | |
763 | ||
21a38489 | 764 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
765 | if (!path) |
766 | return NULL; | |
767 | ||
21a38489 | 768 | path->dev = dev; |
1da177e4 LT |
769 | |
770 | skb_queue_head_init(&path->queue); | |
771 | ||
772 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 773 | |
37c22a77 | 774 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
2337f809 RD |
775 | path->pathrec.sgid = priv->local_gid; |
776 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
81668838 SH |
777 | path->pathrec.numb_path = 1; |
778 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
779 | |
780 | return path; | |
781 | } | |
782 | ||
783 | static int path_rec_start(struct net_device *dev, | |
784 | struct ipoib_path *path) | |
785 | { | |
786 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
787 | ||
5b095d98 | 788 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 789 | path->pathrec.dgid.raw); |
1da177e4 | 790 | |
65c7edda RD |
791 | init_completion(&path->done); |
792 | ||
1da177e4 | 793 | path->query_id = |
c1a0b23b | 794 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
795 | &path->pathrec, |
796 | IB_SA_PATH_REC_DGID | | |
797 | IB_SA_PATH_REC_SGID | | |
798 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 799 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
800 | IB_SA_PATH_REC_PKEY, |
801 | 1000, GFP_ATOMIC, | |
802 | path_rec_completion, | |
803 | path, &path->query); | |
804 | if (path->query_id < 0) { | |
01b3fc8b | 805 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 806 | path->query = NULL; |
93a3ab93 | 807 | complete(&path->done); |
1da177e4 LT |
808 | return path->query_id; |
809 | } | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
b63b70d8 SP |
814 | static void neigh_add_path(struct sk_buff *skb, u8 *daddr, |
815 | struct net_device *dev) | |
1da177e4 LT |
816 | { |
817 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
818 | struct ipoib_path *path; | |
819 | struct ipoib_neigh *neigh; | |
943c246e | 820 | unsigned long flags; |
1da177e4 | 821 | |
b5120a6e | 822 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 | 823 | neigh = ipoib_neigh_alloc(daddr, dev); |
1da177e4 | 824 | if (!neigh) { |
b5120a6e | 825 | spin_unlock_irqrestore(&priv->lock, flags); |
de903512 | 826 | ++dev->stats.tx_dropped; |
1da177e4 LT |
827 | dev_kfree_skb_any(skb); |
828 | return; | |
829 | } | |
830 | ||
b63b70d8 | 831 | path = __path_find(dev, daddr + 4); |
1da177e4 | 832 | if (!path) { |
b63b70d8 | 833 | path = path_rec_create(dev, daddr + 4); |
1da177e4 | 834 | if (!path) |
d2e0655e | 835 | goto err_path; |
1da177e4 LT |
836 | |
837 | __path_add(dev, path); | |
838 | } | |
839 | ||
840 | list_add_tail(&neigh->list, &path->neigh_list); | |
841 | ||
47f7a071 | 842 | if (path->ah) { |
1da177e4 LT |
843 | kref_get(&path->ah->ref); |
844 | neigh->ah = path->ah; | |
845 | ||
b63b70d8 | 846 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
847 | if (!ipoib_cm_get(neigh)) |
848 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
849 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 850 | ipoib_neigh_free(neigh); |
839fcaba MT |
851 | goto err_drop; |
852 | } | |
853 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
854 | __skb_queue_tail(&neigh->queue, skb); | |
855 | else { | |
856 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
857 | skb_queue_len(&neigh->queue)); | |
858 | goto err_drop; | |
859 | } | |
721d67cd RD |
860 | } else { |
861 | spin_unlock_irqrestore(&priv->lock, flags); | |
b63b70d8 SP |
862 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(daddr)); |
863 | ipoib_neigh_put(neigh); | |
721d67cd RD |
864 | return; |
865 | } | |
1da177e4 LT |
866 | } else { |
867 | neigh->ah = NULL; | |
1da177e4 LT |
868 | |
869 | if (!path->query && path_rec_start(dev, path)) | |
49b8e744 | 870 | goto err_path; |
1e85b806 ES |
871 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) |
872 | __skb_queue_tail(&neigh->queue, skb); | |
873 | else | |
874 | goto err_drop; | |
1da177e4 LT |
875 | } |
876 | ||
943c246e | 877 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 878 | ipoib_neigh_put(neigh); |
1da177e4 LT |
879 | return; |
880 | ||
d2e0655e | 881 | err_path: |
b63b70d8 | 882 | ipoib_neigh_free(neigh); |
839fcaba | 883 | err_drop: |
de903512 | 884 | ++dev->stats.tx_dropped; |
1da177e4 LT |
885 | dev_kfree_skb_any(skb); |
886 | ||
943c246e | 887 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 888 | ipoib_neigh_put(neigh); |
1da177e4 LT |
889 | } |
890 | ||
891 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
936d7de3 | 892 | struct ipoib_cb *cb) |
1da177e4 LT |
893 | { |
894 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
895 | struct ipoib_path *path; | |
943c246e | 896 | unsigned long flags; |
1da177e4 | 897 | |
943c246e | 898 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 899 | |
936d7de3 | 900 | path = __path_find(dev, cb->hwaddr + 4); |
ee1e2c82 | 901 | if (!path || !path->valid) { |
71d98b46 JM |
902 | int new_path = 0; |
903 | ||
904 | if (!path) { | |
936d7de3 | 905 | path = path_rec_create(dev, cb->hwaddr + 4); |
71d98b46 JM |
906 | new_path = 1; |
907 | } | |
1da177e4 | 908 | if (path) { |
1e85b806 ES |
909 | if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
910 | __skb_queue_tail(&path->queue, skb); | |
911 | } else { | |
912 | ++dev->stats.tx_dropped; | |
913 | dev_kfree_skb_any(skb); | |
914 | } | |
1da177e4 | 915 | |
ff79ae80 | 916 | if (!path->query && path_rec_start(dev, path)) { |
943c246e | 917 | spin_unlock_irqrestore(&priv->lock, flags); |
71d98b46 JM |
918 | if (new_path) |
919 | path_free(dev, path); | |
1da177e4 LT |
920 | return; |
921 | } else | |
922 | __path_add(dev, path); | |
923 | } else { | |
de903512 | 924 | ++dev->stats.tx_dropped; |
1da177e4 LT |
925 | dev_kfree_skb_any(skb); |
926 | } | |
927 | ||
943c246e | 928 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
929 | return; |
930 | } | |
931 | ||
47f7a071 | 932 | if (path->ah) { |
1da177e4 LT |
933 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
934 | be16_to_cpu(path->pathrec.dlid)); | |
935 | ||
721d67cd | 936 | spin_unlock_irqrestore(&priv->lock, flags); |
936d7de3 | 937 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(cb->hwaddr)); |
721d67cd | 938 | return; |
1da177e4 LT |
939 | } else if ((path->query || !path_rec_start(dev, path)) && |
940 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
1da177e4 LT |
941 | __skb_queue_tail(&path->queue, skb); |
942 | } else { | |
de903512 | 943 | ++dev->stats.tx_dropped; |
1da177e4 LT |
944 | dev_kfree_skb_any(skb); |
945 | } | |
946 | ||
943c246e | 947 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
948 | } |
949 | ||
950 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
951 | { | |
952 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
953 | struct ipoib_neigh *neigh; | |
b49fe362 | 954 | struct ipoib_cb *cb = ipoib_skb_cb(skb); |
b63b70d8 | 955 | struct ipoib_header *header; |
1da177e4 LT |
956 | unsigned long flags; |
957 | ||
b63b70d8 SP |
958 | header = (struct ipoib_header *) skb->data; |
959 | ||
960 | if (unlikely(cb->hwaddr[4] == 0xff)) { | |
961 | /* multicast, arrange "if" according to probability */ | |
962 | if ((header->proto != htons(ETH_P_IP)) && | |
963 | (header->proto != htons(ETH_P_IPV6)) && | |
964 | (header->proto != htons(ETH_P_ARP)) && | |
dc850b0e PM |
965 | (header->proto != htons(ETH_P_RARP)) && |
966 | (header->proto != htons(ETH_P_TIPC))) { | |
b63b70d8 | 967 | /* ethertype not supported by IPoIB */ |
17e6abee DM |
968 | ++dev->stats.tx_dropped; |
969 | dev_kfree_skb_any(skb); | |
b63b70d8 | 970 | return NETDEV_TX_OK; |
17e6abee | 971 | } |
b63b70d8 SP |
972 | /* Add in the P_Key for multicast*/ |
973 | cb->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
974 | cb->hwaddr[9] = priv->pkey & 0xff; | |
975 | ||
976 | neigh = ipoib_neigh_get(dev, cb->hwaddr); | |
977 | if (likely(neigh)) | |
978 | goto send_using_neigh; | |
979 | ipoib_mcast_send(dev, cb->hwaddr, skb); | |
980 | return NETDEV_TX_OK; | |
17e6abee | 981 | } |
1da177e4 | 982 | |
b63b70d8 SP |
983 | /* unicast, arrange "switch" according to probability */ |
984 | switch (header->proto) { | |
985 | case htons(ETH_P_IP): | |
986 | case htons(ETH_P_IPV6): | |
dc850b0e | 987 | case htons(ETH_P_TIPC): |
b63b70d8 SP |
988 | neigh = ipoib_neigh_get(dev, cb->hwaddr); |
989 | if (unlikely(!neigh)) { | |
990 | neigh_add_path(skb, cb->hwaddr, dev); | |
991 | return NETDEV_TX_OK; | |
a50df398 | 992 | } |
b63b70d8 SP |
993 | break; |
994 | case htons(ETH_P_ARP): | |
995 | case htons(ETH_P_RARP): | |
996 | /* for unicast ARP and RARP should always perform path find */ | |
997 | unicast_arp_send(skb, dev, cb); | |
998 | return NETDEV_TX_OK; | |
999 | default: | |
1000 | /* ethertype not supported by IPoIB */ | |
1001 | ++dev->stats.tx_dropped; | |
1002 | dev_kfree_skb_any(skb); | |
1003 | return NETDEV_TX_OK; | |
1004 | } | |
8a7f7521 | 1005 | |
b63b70d8 SP |
1006 | send_using_neigh: |
1007 | /* note we now hold a ref to neigh */ | |
1008 | if (ipoib_cm_get(neigh)) { | |
1009 | if (ipoib_cm_up(neigh)) { | |
1010 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
1011 | goto unref; | |
1da177e4 | 1012 | } |
b63b70d8 SP |
1013 | } else if (neigh->ah) { |
1014 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(cb->hwaddr)); | |
1015 | goto unref; | |
1016 | } | |
1da177e4 | 1017 | |
b63b70d8 SP |
1018 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
1019 | spin_lock_irqsave(&priv->lock, flags); | |
1020 | __skb_queue_tail(&neigh->queue, skb); | |
1021 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 1022 | } else { |
b63b70d8 SP |
1023 | ++dev->stats.tx_dropped; |
1024 | dev_kfree_skb_any(skb); | |
1025 | } | |
1da177e4 | 1026 | |
b63b70d8 SP |
1027 | unref: |
1028 | ipoib_neigh_put(neigh); | |
1da177e4 | 1029 | |
1da177e4 LT |
1030 | return NETDEV_TX_OK; |
1031 | } | |
1032 | ||
1da177e4 LT |
1033 | static void ipoib_timeout(struct net_device *dev) |
1034 | { | |
1035 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1036 | ||
4b2d319b RD |
1037 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
1038 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
1039 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
1040 | netif_queue_stopped(dev), | |
1041 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
1042 | /* XXX reset QP, etc. */ |
1043 | } | |
1044 | ||
1045 | static int ipoib_hard_header(struct sk_buff *skb, | |
1046 | struct net_device *dev, | |
1047 | unsigned short type, | |
3b04ddde | 1048 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
1049 | { |
1050 | struct ipoib_header *header; | |
b49fe362 | 1051 | struct ipoib_cb *cb = ipoib_skb_cb(skb); |
1da177e4 LT |
1052 | |
1053 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
1054 | ||
1055 | header->proto = htons(type); | |
1056 | header->reserved = 0; | |
1057 | ||
1058 | /* | |
b63b70d8 | 1059 | * we don't rely on dst_entry structure, always stuff the |
936d7de3 RD |
1060 | * destination address into skb->cb so we can figure out where |
1061 | * to send the packet later. | |
1da177e4 | 1062 | */ |
b63b70d8 | 1063 | memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN); |
1da177e4 | 1064 | |
83bdd3b9 | 1065 | return sizeof *header; |
1da177e4 LT |
1066 | } |
1067 | ||
1068 | static void ipoib_set_mcast_list(struct net_device *dev) | |
1069 | { | |
1070 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1071 | ||
7a343d4c LA |
1072 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
1073 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
1074 | return; | |
1075 | } | |
1076 | ||
0b39578b | 1077 | queue_work(priv->wq, &priv->restart_task); |
1da177e4 LT |
1078 | } |
1079 | ||
5aa7add8 ND |
1080 | static int ipoib_get_iflink(const struct net_device *dev) |
1081 | { | |
1082 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1083 | ||
2c153959 ES |
1084 | /* parent interface */ |
1085 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
1086 | return dev->ifindex; | |
1087 | ||
1088 | /* child/vlan interface */ | |
5aa7add8 ND |
1089 | return priv->parent->ifindex; |
1090 | } | |
1091 | ||
b63b70d8 | 1092 | static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) |
1da177e4 | 1093 | { |
b63b70d8 SP |
1094 | /* |
1095 | * Use only the address parts that contributes to spreading | |
1096 | * The subnet prefix is not used as one can not connect to | |
1097 | * same remote port (GUID) using the same remote QPN via two | |
1098 | * different subnets. | |
1099 | */ | |
1100 | /* qpn octets[1:4) & port GUID octets[12:20) */ | |
9d1ad66e | 1101 | u32 *d32 = (u32 *) daddr; |
b63b70d8 SP |
1102 | u32 hv; |
1103 | ||
9d1ad66e | 1104 | hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0); |
b63b70d8 SP |
1105 | return hv & htbl->mask; |
1106 | } | |
1107 | ||
1108 | struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr) | |
1109 | { | |
1110 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1111 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1112 | struct ipoib_neigh_hash *htbl; | |
1113 | struct ipoib_neigh *neigh = NULL; | |
1114 | u32 hash_val; | |
1115 | ||
1116 | rcu_read_lock_bh(); | |
1117 | ||
1118 | htbl = rcu_dereference_bh(ntbl->htbl); | |
1119 | ||
1120 | if (!htbl) | |
1121 | goto out_unlock; | |
1122 | ||
1123 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1124 | for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]); | |
1125 | neigh != NULL; | |
1126 | neigh = rcu_dereference_bh(neigh->hnext)) { | |
1127 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { | |
1128 | /* found, take one ref on behalf of the caller */ | |
1129 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1130 | /* deleted */ | |
1131 | neigh = NULL; | |
1132 | goto out_unlock; | |
1133 | } | |
1134 | neigh->alive = jiffies; | |
1135 | goto out_unlock; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | out_unlock: | |
1140 | rcu_read_unlock_bh(); | |
1141 | return neigh; | |
1142 | } | |
1143 | ||
1144 | static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv) | |
1145 | { | |
1146 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1147 | struct ipoib_neigh_hash *htbl; | |
1148 | unsigned long neigh_obsolete; | |
1149 | unsigned long dt; | |
1da177e4 | 1150 | unsigned long flags; |
b63b70d8 | 1151 | int i; |
1da177e4 | 1152 | |
b63b70d8 | 1153 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) |
732a2170 | 1154 | return; |
1da177e4 | 1155 | |
b5120a6e | 1156 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1157 | |
1158 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1159 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1160 | |
1161 | if (!htbl) | |
1162 | goto out_unlock; | |
1163 | ||
1164 | /* neigh is obsolete if it was idle for two GC periods */ | |
1165 | dt = 2 * arp_tbl.gc_interval; | |
1166 | neigh_obsolete = jiffies - dt; | |
1167 | /* handle possible race condition */ | |
1168 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
1169 | goto out_unlock; | |
1170 | ||
1171 | for (i = 0; i < htbl->size; i++) { | |
1172 | struct ipoib_neigh *neigh; | |
1173 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1174 | ||
1175 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1176 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1177 | /* was the neigh idle for two GC periods */ |
1178 | if (time_after(neigh_obsolete, neigh->alive)) { | |
1179 | rcu_assign_pointer(*np, | |
1180 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1181 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1182 | /* remove from path/mc list */ |
b63b70d8 | 1183 | list_del(&neigh->list); |
b63b70d8 SP |
1184 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1185 | } else { | |
1186 | np = &neigh->hnext; | |
1187 | } | |
1da177e4 | 1188 | |
b63b70d8 SP |
1189 | } |
1190 | } | |
1da177e4 | 1191 | |
b63b70d8 | 1192 | out_unlock: |
b5120a6e | 1193 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 1194 | } |
1da177e4 | 1195 | |
b63b70d8 SP |
1196 | static void ipoib_reap_neigh(struct work_struct *work) |
1197 | { | |
1198 | struct ipoib_dev_priv *priv = | |
1199 | container_of(work, struct ipoib_dev_priv, neigh_reap_task.work); | |
1200 | ||
1201 | __ipoib_reap_neigh(priv); | |
1202 | ||
1203 | if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
0b39578b | 1204 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
b63b70d8 | 1205 | arp_tbl.gc_interval); |
1da177e4 LT |
1206 | } |
1207 | ||
b63b70d8 SP |
1208 | |
1209 | static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr, | |
732a2170 | 1210 | struct net_device *dev) |
d2e0655e MT |
1211 | { |
1212 | struct ipoib_neigh *neigh; | |
1213 | ||
b63b70d8 | 1214 | neigh = kzalloc(sizeof *neigh, GFP_ATOMIC); |
d2e0655e MT |
1215 | if (!neigh) |
1216 | return NULL; | |
1217 | ||
732a2170 | 1218 | neigh->dev = dev; |
b63b70d8 | 1219 | memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr)); |
82b39913 | 1220 | skb_queue_head_init(&neigh->queue); |
b63b70d8 | 1221 | INIT_LIST_HEAD(&neigh->list); |
839fcaba | 1222 | ipoib_cm_set(neigh, NULL); |
b63b70d8 SP |
1223 | /* one ref on behalf of the caller */ |
1224 | atomic_set(&neigh->refcnt, 1); | |
1225 | ||
1226 | return neigh; | |
1227 | } | |
1228 | ||
1229 | struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr, | |
1230 | struct net_device *dev) | |
1231 | { | |
1232 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1233 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1234 | struct ipoib_neigh_hash *htbl; | |
1235 | struct ipoib_neigh *neigh; | |
1236 | u32 hash_val; | |
1237 | ||
b63b70d8 | 1238 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1239 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1240 | if (!htbl) { |
1241 | neigh = NULL; | |
1242 | goto out_unlock; | |
1243 | } | |
1244 | ||
1245 | /* need to add a new neigh, but maybe some other thread succeeded? | |
1246 | * recalc hash, maybe hash resize took place so we do a search | |
1247 | */ | |
1248 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1249 | for (neigh = rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1250 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1251 | neigh != NULL; |
1252 | neigh = rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1253 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1254 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { |
1255 | /* found, take one ref on behalf of the caller */ | |
1256 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1257 | /* deleted */ | |
1258 | neigh = NULL; | |
1259 | break; | |
1260 | } | |
1261 | neigh->alive = jiffies; | |
1262 | goto out_unlock; | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | neigh = ipoib_neigh_ctor(daddr, dev); | |
1267 | if (!neigh) | |
1268 | goto out_unlock; | |
1269 | ||
1270 | /* one ref on behalf of the hash table */ | |
1271 | atomic_inc(&neigh->refcnt); | |
1272 | neigh->alive = jiffies; | |
1273 | /* put in hash */ | |
1274 | rcu_assign_pointer(neigh->hnext, | |
1275 | rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1276 | lockdep_is_held(&priv->lock))); |
b63b70d8 SP |
1277 | rcu_assign_pointer(htbl->buckets[hash_val], neigh); |
1278 | atomic_inc(&ntbl->entries); | |
1279 | ||
1280 | out_unlock: | |
d2e0655e MT |
1281 | |
1282 | return neigh; | |
1283 | } | |
1284 | ||
b63b70d8 | 1285 | void ipoib_neigh_dtor(struct ipoib_neigh *neigh) |
d2e0655e | 1286 | { |
b63b70d8 SP |
1287 | /* neigh reference count was dropprd to zero */ |
1288 | struct net_device *dev = neigh->dev; | |
1289 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2745b5b7 | 1290 | struct sk_buff *skb; |
b63b70d8 SP |
1291 | if (neigh->ah) |
1292 | ipoib_put_ah(neigh->ah); | |
2745b5b7 | 1293 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 1294 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
1295 | dev_kfree_skb_any(skb); |
1296 | } | |
839fcaba MT |
1297 | if (ipoib_cm_get(neigh)) |
1298 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
b63b70d8 SP |
1299 | ipoib_dbg(netdev_priv(dev), |
1300 | "neigh free for %06x %pI6\n", | |
1301 | IPOIB_QPN(neigh->daddr), | |
1302 | neigh->daddr + 4); | |
d2e0655e | 1303 | kfree(neigh); |
b63b70d8 SP |
1304 | if (atomic_dec_and_test(&priv->ntbl.entries)) { |
1305 | if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags)) | |
1306 | complete(&priv->ntbl.flushed); | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | static void ipoib_neigh_reclaim(struct rcu_head *rp) | |
1311 | { | |
1312 | /* Called as a result of removal from hash table */ | |
1313 | struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu); | |
1314 | /* note TX context may hold another ref */ | |
1315 | ipoib_neigh_put(neigh); | |
d2e0655e MT |
1316 | } |
1317 | ||
b63b70d8 | 1318 | void ipoib_neigh_free(struct ipoib_neigh *neigh) |
1da177e4 | 1319 | { |
b63b70d8 SP |
1320 | struct net_device *dev = neigh->dev; |
1321 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1322 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1323 | struct ipoib_neigh_hash *htbl; | |
1324 | struct ipoib_neigh __rcu **np; | |
1325 | struct ipoib_neigh *n; | |
1326 | u32 hash_val; | |
1327 | ||
b63b70d8 | 1328 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1329 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1330 | if (!htbl) |
b5120a6e | 1331 | return; |
b63b70d8 SP |
1332 | |
1333 | hash_val = ipoib_addr_hash(htbl, neigh->daddr); | |
1334 | np = &htbl->buckets[hash_val]; | |
1335 | for (n = rcu_dereference_protected(*np, | |
b5120a6e | 1336 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1337 | n != NULL; |
6c723a68 | 1338 | n = rcu_dereference_protected(*np, |
b5120a6e | 1339 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1340 | if (n == neigh) { |
1341 | /* found */ | |
1342 | rcu_assign_pointer(*np, | |
1343 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1344 | lockdep_is_held(&priv->lock))); |
49b8e744 JF |
1345 | /* remove from parent list */ |
1346 | list_del(&neigh->list); | |
b63b70d8 | 1347 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
b5120a6e | 1348 | return; |
b63b70d8 SP |
1349 | } else { |
1350 | np = &n->hnext; | |
1351 | } | |
1352 | } | |
b63b70d8 SP |
1353 | } |
1354 | ||
1355 | static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) | |
1356 | { | |
1357 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1358 | struct ipoib_neigh_hash *htbl; | |
52374967 | 1359 | struct ipoib_neigh __rcu **buckets; |
b63b70d8 SP |
1360 | u32 size; |
1361 | ||
1362 | clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); | |
1363 | ntbl->htbl = NULL; | |
b63b70d8 SP |
1364 | htbl = kzalloc(sizeof(*htbl), GFP_KERNEL); |
1365 | if (!htbl) | |
1366 | return -ENOMEM; | |
1367 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1368 | size = roundup_pow_of_two(arp_tbl.gc_thresh3); | |
1369 | buckets = kzalloc(size * sizeof(*buckets), GFP_KERNEL); | |
1370 | if (!buckets) { | |
1371 | kfree(htbl); | |
1372 | return -ENOMEM; | |
1373 | } | |
1374 | htbl->size = size; | |
1375 | htbl->mask = (size - 1); | |
1376 | htbl->buckets = buckets; | |
52374967 | 1377 | RCU_INIT_POINTER(ntbl->htbl, htbl); |
66172c09 | 1378 | htbl->ntbl = ntbl; |
b63b70d8 SP |
1379 | atomic_set(&ntbl->entries, 0); |
1380 | ||
1381 | /* start garbage collection */ | |
1382 | clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
0b39578b | 1383 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
b63b70d8 | 1384 | arp_tbl.gc_interval); |
1da177e4 LT |
1385 | |
1386 | return 0; | |
1387 | } | |
1388 | ||
b63b70d8 SP |
1389 | static void neigh_hash_free_rcu(struct rcu_head *head) |
1390 | { | |
1391 | struct ipoib_neigh_hash *htbl = container_of(head, | |
1392 | struct ipoib_neigh_hash, | |
1393 | rcu); | |
1394 | struct ipoib_neigh __rcu **buckets = htbl->buckets; | |
66172c09 | 1395 | struct ipoib_neigh_table *ntbl = htbl->ntbl; |
b63b70d8 SP |
1396 | |
1397 | kfree(buckets); | |
1398 | kfree(htbl); | |
66172c09 | 1399 | complete(&ntbl->deleted); |
b63b70d8 SP |
1400 | } |
1401 | ||
1402 | void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid) | |
1403 | { | |
1404 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1405 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1406 | struct ipoib_neigh_hash *htbl; | |
1407 | unsigned long flags; | |
1408 | int i; | |
1409 | ||
1410 | /* remove all neigh connected to a given path or mcast */ | |
b5120a6e | 1411 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1412 | |
1413 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1414 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1415 | |
1416 | if (!htbl) | |
1417 | goto out_unlock; | |
1418 | ||
1419 | for (i = 0; i < htbl->size; i++) { | |
1420 | struct ipoib_neigh *neigh; | |
1421 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1422 | ||
1423 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1424 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1425 | /* delete neighs belong to this parent */ |
1426 | if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) { | |
1427 | rcu_assign_pointer(*np, | |
1428 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1429 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1430 | /* remove from parent list */ |
b63b70d8 | 1431 | list_del(&neigh->list); |
b63b70d8 SP |
1432 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1433 | } else { | |
1434 | np = &neigh->hnext; | |
1435 | } | |
1436 | ||
1437 | } | |
1438 | } | |
1439 | out_unlock: | |
b5120a6e | 1440 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 SP |
1441 | } |
1442 | ||
1443 | static void ipoib_flush_neighs(struct ipoib_dev_priv *priv) | |
1444 | { | |
1445 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1446 | struct ipoib_neigh_hash *htbl; | |
1447 | unsigned long flags; | |
66172c09 | 1448 | int i, wait_flushed = 0; |
b63b70d8 | 1449 | |
66172c09 | 1450 | init_completion(&priv->ntbl.flushed); |
b63b70d8 | 1451 | |
b5120a6e | 1452 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1453 | |
1454 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1455 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1456 | if (!htbl) |
1457 | goto out_unlock; | |
1458 | ||
66172c09 SP |
1459 | wait_flushed = atomic_read(&priv->ntbl.entries); |
1460 | if (!wait_flushed) | |
1461 | goto free_htbl; | |
1462 | ||
b63b70d8 SP |
1463 | for (i = 0; i < htbl->size; i++) { |
1464 | struct ipoib_neigh *neigh; | |
1465 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1466 | ||
1467 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1468 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1469 | rcu_assign_pointer(*np, |
1470 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1471 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1472 | /* remove from path/mc list */ |
b63b70d8 | 1473 | list_del(&neigh->list); |
b63b70d8 SP |
1474 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1475 | } | |
1476 | } | |
1477 | ||
66172c09 | 1478 | free_htbl: |
b63b70d8 SP |
1479 | rcu_assign_pointer(ntbl->htbl, NULL); |
1480 | call_rcu(&htbl->rcu, neigh_hash_free_rcu); | |
1481 | ||
1482 | out_unlock: | |
b5120a6e | 1483 | spin_unlock_irqrestore(&priv->lock, flags); |
66172c09 SP |
1484 | if (wait_flushed) |
1485 | wait_for_completion(&priv->ntbl.flushed); | |
b63b70d8 SP |
1486 | } |
1487 | ||
1488 | static void ipoib_neigh_hash_uninit(struct net_device *dev) | |
1489 | { | |
1490 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1491 | int stopped; | |
1492 | ||
1493 | ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n"); | |
66172c09 | 1494 | init_completion(&priv->ntbl.deleted); |
b63b70d8 SP |
1495 | set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); |
1496 | ||
1497 | /* Stop GC if called at init fail need to cancel work */ | |
1498 | stopped = test_and_set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1499 | if (!stopped) | |
1500 | cancel_delayed_work(&priv->neigh_reap_task); | |
1501 | ||
66172c09 SP |
1502 | ipoib_flush_neighs(priv); |
1503 | ||
1504 | wait_for_completion(&priv->ntbl.deleted); | |
b63b70d8 SP |
1505 | } |
1506 | ||
1507 | ||
1da177e4 LT |
1508 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
1509 | { | |
1510 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1511 | ||
1512 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 1513 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
1514 | GFP_KERNEL); |
1515 | if (!priv->rx_ring) { | |
1516 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 1517 | ca->name, ipoib_recvq_size); |
be7aa663 | 1518 | goto out; |
1da177e4 | 1519 | } |
1da177e4 | 1520 | |
948579cd | 1521 | priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 LT |
1522 | if (!priv->tx_ring) { |
1523 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 1524 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
1525 | goto out_rx_ring_cleanup; |
1526 | } | |
1da177e4 | 1527 | |
1b524963 | 1528 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
1529 | |
1530 | if (ipoib_ib_dev_init(dev, ca, port)) | |
1531 | goto out_tx_ring_cleanup; | |
1532 | ||
be7aa663 DL |
1533 | /* |
1534 | * Must be after ipoib_ib_dev_init so we can allocate a per | |
1535 | * device wq there and use it here | |
1536 | */ | |
1537 | if (ipoib_neigh_hash_init(priv) < 0) | |
1538 | goto out_dev_uninit; | |
1539 | ||
1da177e4 LT |
1540 | return 0; |
1541 | ||
be7aa663 DL |
1542 | out_dev_uninit: |
1543 | ipoib_ib_dev_cleanup(dev); | |
1544 | ||
1da177e4 | 1545 | out_tx_ring_cleanup: |
10313cbb | 1546 | vfree(priv->tx_ring); |
1da177e4 LT |
1547 | |
1548 | out_rx_ring_cleanup: | |
1549 | kfree(priv->rx_ring); | |
1550 | ||
1551 | out: | |
1552 | return -ENOMEM; | |
1553 | } | |
1554 | ||
1555 | void ipoib_dev_cleanup(struct net_device *dev) | |
1556 | { | |
1557 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
9baa0b03 OG |
1558 | LIST_HEAD(head); |
1559 | ||
1560 | ASSERT_RTNL(); | |
1da177e4 | 1561 | |
1732b0ef | 1562 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
1563 | |
1564 | /* Delete any child interfaces first */ | |
1565 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
b63b70d8 SP |
1566 | /* Stop GC on child */ |
1567 | set_bit(IPOIB_STOP_NEIGH_GC, &cpriv->flags); | |
1568 | cancel_delayed_work(&cpriv->neigh_reap_task); | |
9baa0b03 | 1569 | unregister_netdevice_queue(cpriv->dev, &head); |
1da177e4 | 1570 | } |
9baa0b03 | 1571 | unregister_netdevice_many(&head); |
1da177e4 | 1572 | |
be7aa663 DL |
1573 | /* |
1574 | * Must be before ipoib_ib_dev_cleanup or we delete an in use | |
1575 | * work queue | |
1576 | */ | |
1577 | ipoib_neigh_hash_uninit(dev); | |
1578 | ||
1da177e4 LT |
1579 | ipoib_ib_dev_cleanup(dev); |
1580 | ||
92a6b34b | 1581 | kfree(priv->rx_ring); |
10313cbb | 1582 | vfree(priv->tx_ring); |
1da177e4 | 1583 | |
92a6b34b HR |
1584 | priv->rx_ring = NULL; |
1585 | priv->tx_ring = NULL; | |
1da177e4 LT |
1586 | } |
1587 | ||
3b04ddde SH |
1588 | static const struct header_ops ipoib_header_ops = { |
1589 | .create = ipoib_hard_header, | |
1590 | }; | |
1591 | ||
fe8114e8 | 1592 | static const struct net_device_ops ipoib_netdev_ops = { |
9baa0b03 | 1593 | .ndo_uninit = ipoib_uninit, |
fe8114e8 SH |
1594 | .ndo_open = ipoib_open, |
1595 | .ndo_stop = ipoib_stop, | |
1596 | .ndo_change_mtu = ipoib_change_mtu, | |
3d96c74d | 1597 | .ndo_fix_features = ipoib_fix_features, |
fe8114e8 SH |
1598 | .ndo_start_xmit = ipoib_start_xmit, |
1599 | .ndo_tx_timeout = ipoib_timeout, | |
afc4b13d | 1600 | .ndo_set_rx_mode = ipoib_set_mcast_list, |
5aa7add8 | 1601 | .ndo_get_iflink = ipoib_get_iflink, |
fe8114e8 SH |
1602 | }; |
1603 | ||
9baa0b03 | 1604 | void ipoib_setup(struct net_device *dev) |
1da177e4 LT |
1605 | { |
1606 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1607 | ||
fe8114e8 | 1608 | dev->netdev_ops = &ipoib_netdev_ops; |
2337f809 | 1609 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 1610 | |
82c24c18 EC |
1611 | ipoib_set_ethtool_ops(dev); |
1612 | ||
7f1a3867 | 1613 | netif_napi_add(dev, &priv->napi, ipoib_poll, NAPI_POLL_WEIGHT); |
1da177e4 | 1614 | |
2337f809 | 1615 | dev->watchdog_timeo = HZ; |
1da177e4 | 1616 | |
2337f809 | 1617 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 | 1618 | |
936d7de3 | 1619 | dev->hard_header_len = IPOIB_ENCAP_LEN; |
2337f809 RD |
1620 | dev->addr_len = INFINIBAND_ALEN; |
1621 | dev->type = ARPHRD_INFINIBAND; | |
1622 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 1623 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 1624 | NETIF_F_HIGHDMA); |
02875878 | 1625 | netif_keep_dst(dev); |
1da177e4 | 1626 | |
1da177e4 LT |
1627 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
1628 | ||
1da177e4 LT |
1629 | priv->dev = dev; |
1630 | ||
1631 | spin_lock_init(&priv->lock); | |
1da177e4 | 1632 | |
f47944cc | 1633 | init_rwsem(&priv->vlan_rwsem); |
1da177e4 LT |
1634 | |
1635 | INIT_LIST_HEAD(&priv->path_list); | |
1636 | INIT_LIST_HEAD(&priv->child_intfs); | |
1637 | INIT_LIST_HEAD(&priv->dead_ahs); | |
1638 | INIT_LIST_HEAD(&priv->multicast_list); | |
1639 | ||
c4028958 | 1640 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 1641 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
1642 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
1643 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
1644 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
1645 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
1646 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
b63b70d8 | 1647 | INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh); |
1da177e4 LT |
1648 | } |
1649 | ||
1650 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1651 | { | |
1652 | struct net_device *dev; | |
1653 | ||
c835a677 TG |
1654 | dev = alloc_netdev((int)sizeof(struct ipoib_dev_priv), name, |
1655 | NET_NAME_UNKNOWN, ipoib_setup); | |
1da177e4 LT |
1656 | if (!dev) |
1657 | return NULL; | |
1658 | ||
1659 | return netdev_priv(dev); | |
1660 | } | |
1661 | ||
43cb76d9 GKH |
1662 | static ssize_t show_pkey(struct device *dev, |
1663 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1664 | { |
43cb76d9 | 1665 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1666 | |
1667 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1668 | } | |
43cb76d9 | 1669 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1670 | |
335a64a5 OG |
1671 | static ssize_t show_umcast(struct device *dev, |
1672 | struct device_attribute *attr, char *buf) | |
1673 | { | |
1674 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1675 | ||
1676 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1677 | } | |
1678 | ||
862096a8 | 1679 | void ipoib_set_umcast(struct net_device *ndev, int umcast_val) |
335a64a5 | 1680 | { |
862096a8 | 1681 | struct ipoib_dev_priv *priv = netdev_priv(ndev); |
335a64a5 OG |
1682 | |
1683 | if (umcast_val > 0) { | |
1684 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1685 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1686 | "by userspace\n"); | |
1687 | } else | |
1688 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
862096a8 OG |
1689 | } |
1690 | ||
1691 | static ssize_t set_umcast(struct device *dev, | |
1692 | struct device_attribute *attr, | |
1693 | const char *buf, size_t count) | |
1694 | { | |
1695 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1696 | ||
1697 | ipoib_set_umcast(to_net_dev(dev), umcast_val); | |
335a64a5 OG |
1698 | |
1699 | return count; | |
1700 | } | |
1701 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1702 | ||
1703 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1704 | { | |
1705 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1706 | } | |
1707 | ||
43cb76d9 GKH |
1708 | static ssize_t create_child(struct device *dev, |
1709 | struct device_attribute *attr, | |
1da177e4 LT |
1710 | const char *buf, size_t count) |
1711 | { | |
1712 | int pkey; | |
1713 | int ret; | |
1714 | ||
1715 | if (sscanf(buf, "%i", &pkey) != 1) | |
1716 | return -EINVAL; | |
1717 | ||
3d790a4c | 1718 | if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000) |
1da177e4 LT |
1719 | return -EINVAL; |
1720 | ||
4ce05937 RD |
1721 | /* |
1722 | * Set the full membership bit, so that we join the right | |
1723 | * broadcast group, etc. | |
1724 | */ | |
1725 | pkey |= 0x8000; | |
1726 | ||
43cb76d9 | 1727 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1728 | |
1729 | return ret ? ret : count; | |
1730 | } | |
7a52b34b | 1731 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 1732 | |
43cb76d9 GKH |
1733 | static ssize_t delete_child(struct device *dev, |
1734 | struct device_attribute *attr, | |
1da177e4 LT |
1735 | const char *buf, size_t count) |
1736 | { | |
1737 | int pkey; | |
1738 | int ret; | |
1739 | ||
1740 | if (sscanf(buf, "%i", &pkey) != 1) | |
1741 | return -EINVAL; | |
1742 | ||
1743 | if (pkey < 0 || pkey > 0xffff) | |
1744 | return -EINVAL; | |
1745 | ||
43cb76d9 | 1746 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1747 | |
1748 | return ret ? ret : count; | |
1749 | ||
1750 | } | |
7a52b34b | 1751 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
1752 | |
1753 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1754 | { | |
43cb76d9 | 1755 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1756 | } |
1757 | ||
83bb63f6 OG |
1758 | int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) |
1759 | { | |
1760 | struct ib_device_attr *device_attr; | |
1761 | int result = -ENOMEM; | |
1762 | ||
1763 | device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); | |
1764 | if (!device_attr) { | |
1765 | printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", | |
1766 | hca->name, sizeof *device_attr); | |
1767 | return result; | |
1768 | } | |
1769 | ||
1770 | result = ib_query_device(hca, device_attr); | |
1771 | if (result) { | |
1772 | printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", | |
1773 | hca->name, result); | |
1774 | kfree(device_attr); | |
1775 | return result; | |
1776 | } | |
1777 | priv->hca_caps = device_attr->device_cap_flags; | |
1778 | ||
1779 | kfree(device_attr); | |
1780 | ||
1781 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
3d96c74d MM |
1782 | priv->dev->hw_features = NETIF_F_SG | |
1783 | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; | |
83bb63f6 | 1784 | |
3d96c74d MM |
1785 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
1786 | priv->dev->hw_features |= NETIF_F_TSO; | |
8ae31e5b | 1787 | |
3d96c74d MM |
1788 | priv->dev->features |= priv->dev->hw_features; |
1789 | } | |
83bb63f6 OG |
1790 | |
1791 | return 0; | |
1792 | } | |
1793 | ||
1da177e4 LT |
1794 | static struct net_device *ipoib_add_port(const char *format, |
1795 | struct ib_device *hca, u8 port) | |
1796 | { | |
1797 | struct ipoib_dev_priv *priv; | |
bc7b3a36 | 1798 | struct ib_port_attr attr; |
1da177e4 LT |
1799 | int result = -ENOMEM; |
1800 | ||
1801 | priv = ipoib_intf_alloc(format); | |
1802 | if (!priv) | |
1803 | goto alloc_mem_failed; | |
1804 | ||
1805 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
c3aa9b18 | 1806 | priv->dev->dev_id = port - 1; |
1da177e4 | 1807 | |
58e9cc90 AV |
1808 | result = ib_query_port(hca, port, &attr); |
1809 | if (!result) | |
bc7b3a36 SM |
1810 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); |
1811 | else { | |
1812 | printk(KERN_WARNING "%s: ib_query_port %d failed\n", | |
1813 | hca->name, port); | |
1814 | goto device_init_failed; | |
1815 | } | |
1816 | ||
1817 | /* MTU will be reset when mcast join happens */ | |
1818 | priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1819 | priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; | |
1820 | ||
596b9b68 DM |
1821 | priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh); |
1822 | ||
1da177e4 LT |
1823 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
1824 | if (result) { | |
1825 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1826 | hca->name, port, result); | |
ca6de177 | 1827 | goto device_init_failed; |
1da177e4 LT |
1828 | } |
1829 | ||
58e9cc90 AV |
1830 | result = ipoib_set_dev_features(priv, hca); |
1831 | if (result) | |
6046136c | 1832 | goto device_init_failed; |
af40da89 | 1833 | |
4ce05937 RD |
1834 | /* |
1835 | * Set the full membership bit, so that we join the right | |
1836 | * broadcast group, etc. | |
1837 | */ | |
1838 | priv->pkey |= 0x8000; | |
1839 | ||
1da177e4 LT |
1840 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1841 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1842 | ||
1843 | result = ib_query_gid(hca, port, 0, &priv->local_gid); | |
1844 | if (result) { | |
1845 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1846 | hca->name, port, result); | |
ca6de177 | 1847 | goto device_init_failed; |
1da177e4 LT |
1848 | } else |
1849 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1850 | ||
1da177e4 LT |
1851 | result = ipoib_dev_init(priv->dev, hca, port); |
1852 | if (result < 0) { | |
1853 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1854 | hca->name, port, result); | |
1855 | goto device_init_failed; | |
1856 | } | |
1857 | ||
1858 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1859 | priv->ca, ipoib_event); | |
1860 | result = ib_register_event_handler(&priv->event_handler); | |
1861 | if (result < 0) { | |
1862 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1863 | "port %d (ret = %d)\n", | |
1864 | hca->name, port, result); | |
1865 | goto event_failed; | |
1866 | } | |
1867 | ||
1868 | result = register_netdev(priv->dev); | |
1869 | if (result) { | |
1870 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1871 | hca->name, port, result); | |
1872 | goto register_failed; | |
1873 | } | |
1874 | ||
1732b0ef | 1875 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1876 | |
839fcaba MT |
1877 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1878 | goto sysfs_failed; | |
1da177e4 LT |
1879 | if (ipoib_add_pkey_attr(priv->dev)) |
1880 | goto sysfs_failed; | |
335a64a5 OG |
1881 | if (ipoib_add_umcast_attr(priv->dev)) |
1882 | goto sysfs_failed; | |
43cb76d9 | 1883 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1884 | goto sysfs_failed; |
43cb76d9 | 1885 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1886 | goto sysfs_failed; |
1887 | ||
1888 | return priv->dev; | |
1889 | ||
1890 | sysfs_failed: | |
1732b0ef | 1891 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1892 | unregister_netdev(priv->dev); |
1893 | ||
1894 | register_failed: | |
1895 | ib_unregister_event_handler(&priv->event_handler); | |
0b39578b | 1896 | flush_workqueue(ipoib_workqueue); |
b63b70d8 SP |
1897 | /* Stop GC if started before flush */ |
1898 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1899 | cancel_delayed_work(&priv->neigh_reap_task); | |
0b39578b | 1900 | flush_workqueue(priv->wq); |
1da177e4 LT |
1901 | |
1902 | event_failed: | |
1903 | ipoib_dev_cleanup(priv->dev); | |
1904 | ||
1905 | device_init_failed: | |
1906 | free_netdev(priv->dev); | |
1907 | ||
1908 | alloc_mem_failed: | |
1909 | return ERR_PTR(result); | |
1910 | } | |
1911 | ||
1912 | static void ipoib_add_one(struct ib_device *device) | |
1913 | { | |
1914 | struct list_head *dev_list; | |
1915 | struct net_device *dev; | |
1916 | struct ipoib_dev_priv *priv; | |
4139032b | 1917 | int p; |
8e37ab68 | 1918 | int count = 0; |
07ebafba | 1919 | |
1da177e4 LT |
1920 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1921 | if (!dev_list) | |
1922 | return; | |
1923 | ||
1924 | INIT_LIST_HEAD(dev_list); | |
1925 | ||
4139032b | 1926 | for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) { |
8e37ab68 | 1927 | if (!rdma_protocol_ib(device, p)) |
7b4c8769 | 1928 | continue; |
1da177e4 LT |
1929 | dev = ipoib_add_port("ib%d", device, p); |
1930 | if (!IS_ERR(dev)) { | |
1931 | priv = netdev_priv(dev); | |
1932 | list_add_tail(&priv->list, dev_list); | |
8e37ab68 | 1933 | count++; |
1da177e4 LT |
1934 | } |
1935 | } | |
1936 | ||
8e37ab68 MW |
1937 | if (!count) { |
1938 | kfree(dev_list); | |
1939 | return; | |
1940 | } | |
1941 | ||
1da177e4 LT |
1942 | ib_set_client_data(device, &ipoib_client, dev_list); |
1943 | } | |
1944 | ||
7c1eb45a | 1945 | static void ipoib_remove_one(struct ib_device *device, void *client_data) |
1da177e4 LT |
1946 | { |
1947 | struct ipoib_dev_priv *priv, *tmp; | |
7c1eb45a | 1948 | struct list_head *dev_list = client_data; |
1da177e4 | 1949 | |
5a2815f0 IG |
1950 | if (!dev_list) |
1951 | return; | |
1da177e4 LT |
1952 | |
1953 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
1954 | ib_unregister_event_handler(&priv->event_handler); | |
0b39578b | 1955 | flush_workqueue(ipoib_workqueue); |
a77a57a1 RD |
1956 | |
1957 | rtnl_lock(); | |
1958 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
1959 | rtnl_unlock(); | |
1960 | ||
b63b70d8 SP |
1961 | /* Stop GC */ |
1962 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1963 | cancel_delayed_work(&priv->neigh_reap_task); | |
0b39578b | 1964 | flush_workqueue(priv->wq); |
1da177e4 LT |
1965 | |
1966 | unregister_netdev(priv->dev); | |
1da177e4 LT |
1967 | free_netdev(priv->dev); |
1968 | } | |
06c56e44 MT |
1969 | |
1970 | kfree(dev_list); | |
1da177e4 LT |
1971 | } |
1972 | ||
1973 | static int __init ipoib_init_module(void) | |
1974 | { | |
1975 | int ret; | |
1976 | ||
0f485251 SM |
1977 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
1978 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
1979 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
1980 | ||
1981 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
1982 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
732eacc0 | 1983 | ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); |
68e995a2 PS |
1984 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
1985 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
1986 | #endif | |
0f485251 | 1987 | |
f89271da EC |
1988 | /* |
1989 | * When copying small received packets, we only copy from the | |
1990 | * linear data part of the SKB, so we rely on this condition. | |
1991 | */ | |
1992 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
1993 | ||
1da177e4 LT |
1994 | ret = ipoib_register_debugfs(); |
1995 | if (ret) | |
1996 | return ret; | |
1997 | ||
1998 | /* | |
0b39578b DL |
1999 | * We create a global workqueue here that is used for all flush |
2000 | * operations. However, if you attempt to flush a workqueue | |
2001 | * from a task on that same workqueue, it deadlocks the system. | |
2002 | * We want to be able to flush the tasks associated with a | |
2003 | * specific net device, so we also create a workqueue for each | |
2004 | * netdevice. We queue up the tasks for that device only on | |
2005 | * its private workqueue, and we only queue up flush events | |
2006 | * on our global flush workqueue. This avoids the deadlocks. | |
1da177e4 | 2007 | */ |
0b39578b | 2008 | ipoib_workqueue = create_singlethread_workqueue("ipoib_flush"); |
1da177e4 LT |
2009 | if (!ipoib_workqueue) { |
2010 | ret = -ENOMEM; | |
2011 | goto err_fs; | |
2012 | } | |
2013 | ||
c1a0b23b MT |
2014 | ib_sa_register_client(&ipoib_sa_client); |
2015 | ||
1da177e4 LT |
2016 | ret = ib_register_client(&ipoib_client); |
2017 | if (ret) | |
c1a0b23b | 2018 | goto err_sa; |
1da177e4 | 2019 | |
9baa0b03 OG |
2020 | ret = ipoib_netlink_init(); |
2021 | if (ret) | |
2022 | goto err_client; | |
2023 | ||
1da177e4 LT |
2024 | return 0; |
2025 | ||
9baa0b03 OG |
2026 | err_client: |
2027 | ib_unregister_client(&ipoib_client); | |
2028 | ||
c1a0b23b MT |
2029 | err_sa: |
2030 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
2031 | destroy_workqueue(ipoib_workqueue); |
2032 | ||
9adec1a8 RD |
2033 | err_fs: |
2034 | ipoib_unregister_debugfs(); | |
2035 | ||
1da177e4 LT |
2036 | return ret; |
2037 | } | |
2038 | ||
2039 | static void __exit ipoib_cleanup_module(void) | |
2040 | { | |
9baa0b03 | 2041 | ipoib_netlink_fini(); |
1da177e4 | 2042 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 2043 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 2044 | ipoib_unregister_debugfs(); |
1da177e4 LT |
2045 | destroy_workqueue(ipoib_workqueue); |
2046 | } | |
2047 | ||
2048 | module_init(ipoib_init_module); | |
2049 | module_exit(ipoib_cleanup_module); |