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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> | |
9c3c5f8e | 54 | #include <linux/pci.h> |
14c85021 | 55 | |
4b48680b YB |
56 | #define DRV_VERSION "1.0.0" |
57 | ||
58 | const char ipoib_driver_version[] = DRV_VERSION; | |
59 | ||
1da177e4 LT |
60 | MODULE_AUTHOR("Roland Dreier"); |
61 | MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); | |
62 | MODULE_LICENSE("Dual BSD/GPL"); | |
4b48680b | 63 | MODULE_VERSION(DRV_VERSION); |
1da177e4 | 64 | |
0f485251 SM |
65 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
66 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
67 | ||
68 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
69 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
70 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
71 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
72 | ||
1da177e4 LT |
73 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
74 | int ipoib_debug_level; | |
75 | ||
76 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
77 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
78 | #endif | |
79 | ||
1732b0ef RD |
80 | struct ipoib_path_iter { |
81 | struct net_device *dev; | |
82 | struct ipoib_path path; | |
83 | }; | |
84 | ||
1da177e4 LT |
85 | static const u8 ipv4_bcast_addr[] = { |
86 | 0x00, 0xff, 0xff, 0xff, | |
87 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
88 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
89 | }; | |
90 | ||
91 | struct workqueue_struct *ipoib_workqueue; | |
92 | ||
c1a0b23b MT |
93 | struct ib_sa_client ipoib_sa_client; |
94 | ||
1da177e4 | 95 | static void ipoib_add_one(struct ib_device *device); |
7c1eb45a | 96 | static void ipoib_remove_one(struct ib_device *device, void *client_data); |
b63b70d8 | 97 | static void ipoib_neigh_reclaim(struct rcu_head *rp); |
ddde896e GS |
98 | static struct net_device *ipoib_get_net_dev_by_params( |
99 | struct ib_device *dev, u8 port, u16 pkey, | |
100 | const union ib_gid *gid, const struct sockaddr *addr, | |
101 | void *client_data); | |
1da177e4 LT |
102 | |
103 | static struct ib_client ipoib_client = { | |
104 | .name = "ipoib", | |
105 | .add = ipoib_add_one, | |
ddde896e GS |
106 | .remove = ipoib_remove_one, |
107 | .get_net_dev_by_params = ipoib_get_net_dev_by_params, | |
1da177e4 LT |
108 | }; |
109 | ||
110 | int ipoib_open(struct net_device *dev) | |
111 | { | |
112 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
113 | ||
114 | ipoib_dbg(priv, "bringing up interface\n"); | |
115 | ||
437708c4 MS |
116 | netif_carrier_off(dev); |
117 | ||
e028cc55 | 118 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
1da177e4 | 119 | |
efc82eee | 120 | if (ipoib_ib_dev_open(dev)) { |
dd57c930 AE |
121 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) |
122 | return 0; | |
b8a1b1ce | 123 | goto err_disable; |
dd57c930 | 124 | } |
fe25c561 | 125 | |
b8a1b1ce RD |
126 | if (ipoib_ib_dev_up(dev)) |
127 | goto err_stop; | |
1da177e4 LT |
128 | |
129 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
130 | struct ipoib_dev_priv *cpriv; | |
131 | ||
132 | /* Bring up any child interfaces too */ | |
f47944cc | 133 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
134 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
135 | int flags; | |
136 | ||
137 | flags = cpriv->dev->flags; | |
138 | if (flags & IFF_UP) | |
139 | continue; | |
140 | ||
141 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
142 | } | |
f47944cc | 143 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
144 | } |
145 | ||
146 | netif_start_queue(dev); | |
147 | ||
148 | return 0; | |
b8a1b1ce RD |
149 | |
150 | err_stop: | |
efc82eee | 151 | ipoib_ib_dev_stop(dev); |
b8a1b1ce RD |
152 | |
153 | err_disable: | |
b8a1b1ce RD |
154 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
155 | ||
156 | return -EINVAL; | |
1da177e4 LT |
157 | } |
158 | ||
159 | static int ipoib_stop(struct net_device *dev) | |
160 | { | |
161 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
162 | ||
163 | ipoib_dbg(priv, "stopping interface\n"); | |
164 | ||
165 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
166 | ||
167 | netif_stop_queue(dev); | |
168 | ||
efc82eee DL |
169 | ipoib_ib_dev_down(dev); |
170 | ipoib_ib_dev_stop(dev); | |
1da177e4 LT |
171 | |
172 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
173 | struct ipoib_dev_priv *cpriv; | |
174 | ||
175 | /* Bring down any child interfaces too */ | |
f47944cc | 176 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
177 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
178 | int flags; | |
179 | ||
180 | flags = cpriv->dev->flags; | |
181 | if (!(flags & IFF_UP)) | |
182 | continue; | |
183 | ||
184 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
185 | } | |
f47944cc | 186 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
187 | } |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
9baa0b03 OG |
192 | static void ipoib_uninit(struct net_device *dev) |
193 | { | |
194 | ipoib_dev_cleanup(dev); | |
195 | } | |
196 | ||
9ca36f7d | 197 | static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features) |
3d96c74d MM |
198 | { |
199 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
200 | ||
201 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
c4268778 | 202 | features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); |
3d96c74d MM |
203 | |
204 | return features; | |
205 | } | |
206 | ||
1da177e4 LT |
207 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
208 | { | |
209 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
210 | ||
839fcaba | 211 | /* dev->mtu > 2K ==> connected mode */ |
586a6934 PS |
212 | if (ipoib_cm_admin_enabled(dev)) { |
213 | if (new_mtu > ipoib_cm_max_mtu(dev)) | |
214 | return -EINVAL; | |
215 | ||
839fcaba MT |
216 | if (new_mtu > priv->mcast_mtu) |
217 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
218 | priv->mcast_mtu); | |
586a6934 | 219 | |
839fcaba MT |
220 | dev->mtu = new_mtu; |
221 | return 0; | |
222 | } | |
223 | ||
bc7b3a36 | 224 | if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) |
1da177e4 LT |
225 | return -EINVAL; |
226 | ||
227 | priv->admin_mtu = new_mtu; | |
228 | ||
229 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
ddde896e GS |
234 | /* Called with an RCU read lock taken */ |
235 | static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr, | |
236 | struct net_device *dev) | |
237 | { | |
238 | struct net *net = dev_net(dev); | |
239 | struct in_device *in_dev; | |
240 | struct sockaddr_in *addr_in = (struct sockaddr_in *)addr; | |
241 | struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr; | |
242 | __be32 ret_addr; | |
243 | ||
244 | switch (addr->sa_family) { | |
245 | case AF_INET: | |
246 | in_dev = in_dev_get(dev); | |
247 | if (!in_dev) | |
248 | return false; | |
249 | ||
250 | ret_addr = inet_confirm_addr(net, in_dev, 0, | |
251 | addr_in->sin_addr.s_addr, | |
252 | RT_SCOPE_HOST); | |
253 | in_dev_put(in_dev); | |
254 | if (ret_addr) | |
255 | return true; | |
256 | ||
257 | break; | |
258 | case AF_INET6: | |
259 | if (IS_ENABLED(CONFIG_IPV6) && | |
260 | ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1)) | |
261 | return true; | |
262 | ||
263 | break; | |
264 | } | |
265 | return false; | |
266 | } | |
267 | ||
268 | /** | |
269 | * Find the master net_device on top of the given net_device. | |
270 | * @dev: base IPoIB net_device | |
271 | * | |
272 | * Returns the master net_device with a reference held, or the same net_device | |
273 | * if no master exists. | |
274 | */ | |
275 | static struct net_device *ipoib_get_master_net_dev(struct net_device *dev) | |
276 | { | |
277 | struct net_device *master; | |
278 | ||
279 | rcu_read_lock(); | |
280 | master = netdev_master_upper_dev_get_rcu(dev); | |
281 | if (master) | |
282 | dev_hold(master); | |
283 | rcu_read_unlock(); | |
284 | ||
285 | if (master) | |
286 | return master; | |
287 | ||
288 | dev_hold(dev); | |
289 | return dev; | |
290 | } | |
291 | ||
292 | /** | |
293 | * Find a net_device matching the given address, which is an upper device of | |
294 | * the given net_device. | |
295 | * @addr: IP address to look for. | |
296 | * @dev: base IPoIB net_device | |
297 | * | |
298 | * If found, returns the net_device with a reference held. Otherwise return | |
299 | * NULL. | |
300 | */ | |
301 | static struct net_device *ipoib_get_net_dev_match_addr( | |
302 | const struct sockaddr *addr, struct net_device *dev) | |
303 | { | |
304 | struct net_device *upper, | |
305 | *result = NULL; | |
306 | struct list_head *iter; | |
307 | ||
308 | rcu_read_lock(); | |
309 | if (ipoib_is_dev_match_addr_rcu(addr, dev)) { | |
310 | dev_hold(dev); | |
311 | result = dev; | |
312 | goto out; | |
313 | } | |
314 | ||
315 | netdev_for_each_all_upper_dev_rcu(dev, upper, iter) { | |
316 | if (ipoib_is_dev_match_addr_rcu(addr, upper)) { | |
317 | dev_hold(upper); | |
318 | result = upper; | |
319 | break; | |
320 | } | |
321 | } | |
322 | out: | |
323 | rcu_read_unlock(); | |
324 | return result; | |
325 | } | |
326 | ||
327 | /* returns the number of IPoIB netdevs on top a given ipoib device matching a | |
328 | * pkey_index and address, if one exists. | |
329 | * | |
330 | * @found_net_dev: contains a matching net_device if the return value >= 1, | |
331 | * with a reference held. */ | |
332 | static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv, | |
333 | const union ib_gid *gid, | |
334 | u16 pkey_index, | |
335 | const struct sockaddr *addr, | |
336 | int nesting, | |
337 | struct net_device **found_net_dev) | |
338 | { | |
339 | struct ipoib_dev_priv *child_priv; | |
340 | struct net_device *net_dev = NULL; | |
341 | int matches = 0; | |
342 | ||
343 | if (priv->pkey_index == pkey_index && | |
344 | (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) { | |
345 | if (!addr) { | |
346 | net_dev = ipoib_get_master_net_dev(priv->dev); | |
347 | } else { | |
348 | /* Verify the net_device matches the IP address, as | |
349 | * IPoIB child devices currently share a GID. */ | |
350 | net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev); | |
351 | } | |
352 | if (net_dev) { | |
353 | if (!*found_net_dev) | |
354 | *found_net_dev = net_dev; | |
355 | else | |
356 | dev_put(net_dev); | |
357 | ++matches; | |
358 | } | |
359 | } | |
360 | ||
361 | /* Check child interfaces */ | |
362 | down_read_nested(&priv->vlan_rwsem, nesting); | |
363 | list_for_each_entry(child_priv, &priv->child_intfs, list) { | |
364 | matches += ipoib_match_gid_pkey_addr(child_priv, gid, | |
365 | pkey_index, addr, | |
366 | nesting + 1, | |
367 | found_net_dev); | |
368 | if (matches > 1) | |
369 | break; | |
370 | } | |
371 | up_read(&priv->vlan_rwsem); | |
372 | ||
373 | return matches; | |
374 | } | |
375 | ||
376 | /* Returns the number of matching net_devs found (between 0 and 2). Also | |
377 | * return the matching net_device in the @net_dev parameter, holding a | |
378 | * reference to the net_device, if the number of matches >= 1 */ | |
379 | static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port, | |
380 | u16 pkey_index, | |
381 | const union ib_gid *gid, | |
382 | const struct sockaddr *addr, | |
383 | struct net_device **net_dev) | |
384 | { | |
385 | struct ipoib_dev_priv *priv; | |
386 | int matches = 0; | |
387 | ||
388 | *net_dev = NULL; | |
389 | ||
390 | list_for_each_entry(priv, dev_list, list) { | |
391 | if (priv->port != port) | |
392 | continue; | |
393 | ||
394 | matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index, | |
395 | addr, 0, net_dev); | |
396 | if (matches > 1) | |
397 | break; | |
398 | } | |
399 | ||
400 | return matches; | |
401 | } | |
402 | ||
403 | static struct net_device *ipoib_get_net_dev_by_params( | |
404 | struct ib_device *dev, u8 port, u16 pkey, | |
405 | const union ib_gid *gid, const struct sockaddr *addr, | |
406 | void *client_data) | |
407 | { | |
408 | struct net_device *net_dev; | |
409 | struct list_head *dev_list = client_data; | |
410 | u16 pkey_index; | |
411 | int matches; | |
412 | int ret; | |
413 | ||
414 | if (!rdma_protocol_ib(dev, port)) | |
415 | return NULL; | |
416 | ||
417 | ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index); | |
418 | if (ret) | |
419 | return NULL; | |
420 | ||
421 | if (!dev_list) | |
422 | return NULL; | |
423 | ||
424 | /* See if we can find a unique device matching the L2 parameters */ | |
425 | matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, | |
426 | gid, NULL, &net_dev); | |
427 | ||
428 | switch (matches) { | |
429 | case 0: | |
430 | return NULL; | |
431 | case 1: | |
432 | return net_dev; | |
433 | } | |
434 | ||
435 | dev_put(net_dev); | |
436 | ||
437 | /* Couldn't find a unique device with L2 parameters only. Use L3 | |
438 | * address to uniquely match the net device */ | |
439 | matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, | |
440 | gid, addr, &net_dev); | |
441 | switch (matches) { | |
442 | case 0: | |
443 | return NULL; | |
444 | default: | |
445 | dev_warn_ratelimited(&dev->dev, | |
446 | "duplicate IP address detected\n"); | |
447 | /* Fall through */ | |
448 | case 1: | |
449 | return net_dev; | |
450 | } | |
451 | } | |
452 | ||
71d9c5f9 RD |
453 | int ipoib_set_mode(struct net_device *dev, const char *buf) |
454 | { | |
455 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
456 | ||
457 | /* flush paths if we switch modes so that connections are restarted */ | |
458 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { | |
459 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
460 | ipoib_warn(priv, "enabling connected mode " | |
461 | "will cause multicast packet drops\n"); | |
462 | netdev_update_features(dev); | |
edcd2a74 | 463 | dev_set_mtu(dev, ipoib_cm_max_mtu(dev)); |
71d9c5f9 | 464 | rtnl_unlock(); |
e622f2f4 | 465 | priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; |
71d9c5f9 RD |
466 | |
467 | ipoib_flush_paths(dev); | |
468 | rtnl_lock(); | |
469 | return 0; | |
470 | } | |
471 | ||
472 | if (!strcmp(buf, "datagram\n")) { | |
473 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
474 | netdev_update_features(dev); | |
475 | dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); | |
476 | rtnl_unlock(); | |
477 | ipoib_flush_paths(dev); | |
478 | rtnl_lock(); | |
479 | return 0; | |
480 | } | |
481 | ||
482 | return -EINVAL; | |
483 | } | |
484 | ||
37c22a77 | 485 | static struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 LT |
486 | { |
487 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
488 | struct rb_node *n = priv->path_tree.rb_node; | |
489 | struct ipoib_path *path; | |
490 | int ret; | |
491 | ||
492 | while (n) { | |
493 | path = rb_entry(n, struct ipoib_path, rb_node); | |
494 | ||
37c22a77 | 495 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
496 | sizeof (union ib_gid)); |
497 | ||
498 | if (ret < 0) | |
499 | n = n->rb_left; | |
500 | else if (ret > 0) | |
501 | n = n->rb_right; | |
502 | else | |
503 | return path; | |
504 | } | |
505 | ||
506 | return NULL; | |
507 | } | |
508 | ||
509 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
510 | { | |
511 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
512 | struct rb_node **n = &priv->path_tree.rb_node; | |
513 | struct rb_node *pn = NULL; | |
514 | struct ipoib_path *tpath; | |
515 | int ret; | |
516 | ||
517 | while (*n) { | |
518 | pn = *n; | |
519 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
520 | ||
521 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
522 | sizeof (union ib_gid)); | |
523 | if (ret < 0) | |
524 | n = &pn->rb_left; | |
525 | else if (ret > 0) | |
526 | n = &pn->rb_right; | |
527 | else | |
528 | return -EEXIST; | |
529 | } | |
530 | ||
531 | rb_link_node(&path->rb_node, pn, n); | |
532 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
533 | ||
534 | list_add_tail(&path->list, &priv->path_list); | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
540 | { | |
1da177e4 | 541 | struct sk_buff *skb; |
1da177e4 LT |
542 | |
543 | while ((skb = __skb_dequeue(&path->queue))) | |
544 | dev_kfree_skb_irq(skb); | |
545 | ||
b63b70d8 | 546 | ipoib_dbg(netdev_priv(dev), "path_free\n"); |
1da177e4 | 547 | |
b63b70d8 SP |
548 | /* remove all neigh connected to this path */ |
549 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
1da177e4 LT |
550 | |
551 | if (path->ah) | |
552 | ipoib_put_ah(path->ah); | |
553 | ||
554 | kfree(path); | |
555 | } | |
556 | ||
1732b0ef RD |
557 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
558 | ||
559 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
560 | { | |
561 | struct ipoib_path_iter *iter; | |
562 | ||
563 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
564 | if (!iter) | |
565 | return NULL; | |
566 | ||
567 | iter->dev = dev; | |
568 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
569 | ||
570 | if (ipoib_path_iter_next(iter)) { | |
571 | kfree(iter); | |
572 | return NULL; | |
573 | } | |
574 | ||
575 | return iter; | |
576 | } | |
577 | ||
578 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
579 | { | |
580 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
581 | struct rb_node *n; | |
582 | struct ipoib_path *path; | |
583 | int ret = 1; | |
584 | ||
585 | spin_lock_irq(&priv->lock); | |
586 | ||
587 | n = rb_first(&priv->path_tree); | |
588 | ||
589 | while (n) { | |
590 | path = rb_entry(n, struct ipoib_path, rb_node); | |
591 | ||
592 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
593 | sizeof (union ib_gid)) < 0) { | |
594 | iter->path = *path; | |
595 | ret = 0; | |
596 | break; | |
597 | } | |
598 | ||
599 | n = rb_next(n); | |
600 | } | |
601 | ||
602 | spin_unlock_irq(&priv->lock); | |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
607 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
608 | struct ipoib_path *path) | |
609 | { | |
610 | *path = iter->path; | |
611 | } | |
612 | ||
613 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
614 | ||
ee1e2c82 MS |
615 | void ipoib_mark_paths_invalid(struct net_device *dev) |
616 | { | |
617 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
618 | struct ipoib_path *path, *tp; | |
619 | ||
620 | spin_lock_irq(&priv->lock); | |
621 | ||
622 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
5b095d98 | 623 | ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", |
ee1e2c82 | 624 | be16_to_cpu(path->pathrec.dlid), |
fcace2fe | 625 | path->pathrec.dgid.raw); |
ee1e2c82 MS |
626 | path->valid = 0; |
627 | } | |
628 | ||
629 | spin_unlock_irq(&priv->lock); | |
630 | } | |
631 | ||
1da177e4 LT |
632 | void ipoib_flush_paths(struct net_device *dev) |
633 | { | |
634 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
635 | struct ipoib_path *path, *tp; | |
636 | LIST_HEAD(remove_list); | |
943c246e | 637 | unsigned long flags; |
1da177e4 | 638 | |
943c246e RD |
639 | netif_tx_lock_bh(dev); |
640 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 641 | |
157de229 | 642 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
643 | |
644 | list_for_each_entry(path, &remove_list, list) | |
645 | rb_erase(&path->rb_node, &priv->path_tree); | |
646 | ||
1da177e4 LT |
647 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
648 | if (path->query) | |
649 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
650 | spin_unlock_irqrestore(&priv->lock, flags); |
651 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
652 | wait_for_completion(&path->done); |
653 | path_free(dev, path); | |
943c246e RD |
654 | netif_tx_lock_bh(dev); |
655 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 656 | } |
943c246e RD |
657 | |
658 | spin_unlock_irqrestore(&priv->lock, flags); | |
659 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
660 | } |
661 | ||
662 | static void path_rec_completion(int status, | |
663 | struct ib_sa_path_rec *pathrec, | |
664 | void *path_ptr) | |
665 | { | |
666 | struct ipoib_path *path = path_ptr; | |
667 | struct net_device *dev = path->dev; | |
668 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
669 | struct ipoib_ah *ah = NULL; | |
c9da4bad | 670 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 671 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
672 | struct sk_buff_head skqueue; |
673 | struct sk_buff *skb; | |
674 | unsigned long flags; | |
675 | ||
843613b0 | 676 | if (!status) |
5b095d98 | 677 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
fcace2fe | 678 | be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); |
1da177e4 | 679 | else |
5b095d98 | 680 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 681 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
682 | |
683 | skb_queue_head_init(&skqueue); | |
684 | ||
685 | if (!status) { | |
46f1b3d7 SH |
686 | struct ib_ah_attr av; |
687 | ||
688 | if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) | |
689 | ah = ipoib_create_ah(dev, priv->pd, &av); | |
1da177e4 LT |
690 | } |
691 | ||
692 | spin_lock_irqsave(&priv->lock, flags); | |
693 | ||
3874397c | 694 | if (!IS_ERR_OR_NULL(ah)) { |
1da177e4 LT |
695 | path->pathrec = *pathrec; |
696 | ||
c9da4bad RD |
697 | old_ah = path->ah; |
698 | path->ah = ah; | |
699 | ||
1da177e4 LT |
700 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
701 | ah, be16_to_cpu(pathrec->dlid), pathrec->sl); | |
702 | ||
703 | while ((skb = __skb_dequeue(&path->queue))) | |
704 | __skb_queue_tail(&skqueue, skb); | |
705 | ||
d04d01b1 | 706 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
707 | if (neigh->ah) { |
708 | WARN_ON(neigh->ah != old_ah); | |
709 | /* | |
710 | * Dropping the ah reference inside | |
711 | * priv->lock is safe here, because we | |
712 | * will hold one more reference from | |
713 | * the original value of path->ah (ie | |
714 | * old_ah). | |
715 | */ | |
716 | ipoib_put_ah(neigh->ah); | |
717 | } | |
1da177e4 LT |
718 | kref_get(&path->ah->ref); |
719 | neigh->ah = path->ah; | |
720 | ||
b63b70d8 | 721 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
722 | if (!ipoib_cm_get(neigh)) |
723 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
724 | path, | |
725 | neigh)); | |
726 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 727 | ipoib_neigh_free(neigh); |
839fcaba MT |
728 | continue; |
729 | } | |
730 | } | |
731 | ||
1da177e4 LT |
732 | while ((skb = __skb_dequeue(&neigh->queue))) |
733 | __skb_queue_tail(&skqueue, skb); | |
734 | } | |
ee1e2c82 | 735 | path->valid = 1; |
5872a9fc | 736 | } |
1da177e4 | 737 | |
5872a9fc | 738 | path->query = NULL; |
1da177e4 LT |
739 | complete(&path->done); |
740 | ||
741 | spin_unlock_irqrestore(&priv->lock, flags); | |
742 | ||
f72dd566 RD |
743 | if (IS_ERR_OR_NULL(ah)) |
744 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
745 | ||
ee1e2c82 MS |
746 | if (old_ah) |
747 | ipoib_put_ah(old_ah); | |
748 | ||
1da177e4 LT |
749 | while ((skb = __skb_dequeue(&skqueue))) { |
750 | skb->dev = dev; | |
751 | if (dev_queue_xmit(skb)) | |
752 | ipoib_warn(priv, "dev_queue_xmit failed " | |
753 | "to requeue packet\n"); | |
754 | } | |
755 | } | |
756 | ||
37c22a77 | 757 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 LT |
758 | { |
759 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
760 | struct ipoib_path *path; | |
761 | ||
1401b53a JM |
762 | if (!priv->broadcast) |
763 | return NULL; | |
764 | ||
21a38489 | 765 | path = kzalloc(sizeof *path, GFP_ATOMIC); |
1da177e4 LT |
766 | if (!path) |
767 | return NULL; | |
768 | ||
21a38489 | 769 | path->dev = dev; |
1da177e4 LT |
770 | |
771 | skb_queue_head_init(&path->queue); | |
772 | ||
773 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 774 | |
37c22a77 | 775 | memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); |
2337f809 RD |
776 | path->pathrec.sgid = priv->local_gid; |
777 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
81668838 SH |
778 | path->pathrec.numb_path = 1; |
779 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
1da177e4 LT |
780 | |
781 | return path; | |
782 | } | |
783 | ||
784 | static int path_rec_start(struct net_device *dev, | |
785 | struct ipoib_path *path) | |
786 | { | |
787 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
788 | ||
5b095d98 | 789 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 790 | path->pathrec.dgid.raw); |
1da177e4 | 791 | |
65c7edda RD |
792 | init_completion(&path->done); |
793 | ||
1da177e4 | 794 | path->query_id = |
c1a0b23b | 795 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
796 | &path->pathrec, |
797 | IB_SA_PATH_REC_DGID | | |
798 | IB_SA_PATH_REC_SGID | | |
799 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 800 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
801 | IB_SA_PATH_REC_PKEY, |
802 | 1000, GFP_ATOMIC, | |
803 | path_rec_completion, | |
804 | path, &path->query); | |
805 | if (path->query_id < 0) { | |
01b3fc8b | 806 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 807 | path->query = NULL; |
93a3ab93 | 808 | complete(&path->done); |
1da177e4 LT |
809 | return path->query_id; |
810 | } | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
b63b70d8 SP |
815 | static void neigh_add_path(struct sk_buff *skb, u8 *daddr, |
816 | struct net_device *dev) | |
1da177e4 LT |
817 | { |
818 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
819 | struct ipoib_path *path; | |
820 | struct ipoib_neigh *neigh; | |
943c246e | 821 | unsigned long flags; |
1da177e4 | 822 | |
b5120a6e | 823 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 | 824 | neigh = ipoib_neigh_alloc(daddr, dev); |
1da177e4 | 825 | if (!neigh) { |
b5120a6e | 826 | spin_unlock_irqrestore(&priv->lock, flags); |
de903512 | 827 | ++dev->stats.tx_dropped; |
1da177e4 LT |
828 | dev_kfree_skb_any(skb); |
829 | return; | |
830 | } | |
831 | ||
b63b70d8 | 832 | path = __path_find(dev, daddr + 4); |
1da177e4 | 833 | if (!path) { |
b63b70d8 | 834 | path = path_rec_create(dev, daddr + 4); |
1da177e4 | 835 | if (!path) |
d2e0655e | 836 | goto err_path; |
1da177e4 LT |
837 | |
838 | __path_add(dev, path); | |
839 | } | |
840 | ||
841 | list_add_tail(&neigh->list, &path->neigh_list); | |
842 | ||
47f7a071 | 843 | if (path->ah) { |
1da177e4 LT |
844 | kref_get(&path->ah->ref); |
845 | neigh->ah = path->ah; | |
846 | ||
b63b70d8 | 847 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
848 | if (!ipoib_cm_get(neigh)) |
849 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
850 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 851 | ipoib_neigh_free(neigh); |
839fcaba MT |
852 | goto err_drop; |
853 | } | |
854 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) | |
855 | __skb_queue_tail(&neigh->queue, skb); | |
856 | else { | |
857 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", | |
858 | skb_queue_len(&neigh->queue)); | |
859 | goto err_drop; | |
860 | } | |
721d67cd RD |
861 | } else { |
862 | spin_unlock_irqrestore(&priv->lock, flags); | |
b63b70d8 SP |
863 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(daddr)); |
864 | ipoib_neigh_put(neigh); | |
721d67cd RD |
865 | return; |
866 | } | |
1da177e4 LT |
867 | } else { |
868 | neigh->ah = NULL; | |
1da177e4 LT |
869 | |
870 | if (!path->query && path_rec_start(dev, path)) | |
49b8e744 | 871 | goto err_path; |
1e85b806 ES |
872 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) |
873 | __skb_queue_tail(&neigh->queue, skb); | |
874 | else | |
875 | goto err_drop; | |
1da177e4 LT |
876 | } |
877 | ||
943c246e | 878 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 879 | ipoib_neigh_put(neigh); |
1da177e4 LT |
880 | return; |
881 | ||
d2e0655e | 882 | err_path: |
b63b70d8 | 883 | ipoib_neigh_free(neigh); |
839fcaba | 884 | err_drop: |
de903512 | 885 | ++dev->stats.tx_dropped; |
1da177e4 LT |
886 | dev_kfree_skb_any(skb); |
887 | ||
943c246e | 888 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 889 | ipoib_neigh_put(neigh); |
1da177e4 LT |
890 | } |
891 | ||
892 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
936d7de3 | 893 | struct ipoib_cb *cb) |
1da177e4 LT |
894 | { |
895 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
896 | struct ipoib_path *path; | |
943c246e | 897 | unsigned long flags; |
1da177e4 | 898 | |
943c246e | 899 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 900 | |
936d7de3 | 901 | path = __path_find(dev, cb->hwaddr + 4); |
ee1e2c82 | 902 | if (!path || !path->valid) { |
71d98b46 JM |
903 | int new_path = 0; |
904 | ||
905 | if (!path) { | |
936d7de3 | 906 | path = path_rec_create(dev, cb->hwaddr + 4); |
71d98b46 JM |
907 | new_path = 1; |
908 | } | |
1da177e4 | 909 | if (path) { |
1e85b806 ES |
910 | if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
911 | __skb_queue_tail(&path->queue, skb); | |
912 | } else { | |
913 | ++dev->stats.tx_dropped; | |
914 | dev_kfree_skb_any(skb); | |
915 | } | |
1da177e4 | 916 | |
ff79ae80 | 917 | if (!path->query && path_rec_start(dev, path)) { |
943c246e | 918 | spin_unlock_irqrestore(&priv->lock, flags); |
71d98b46 JM |
919 | if (new_path) |
920 | path_free(dev, path); | |
1da177e4 LT |
921 | return; |
922 | } else | |
923 | __path_add(dev, path); | |
924 | } else { | |
de903512 | 925 | ++dev->stats.tx_dropped; |
1da177e4 LT |
926 | dev_kfree_skb_any(skb); |
927 | } | |
928 | ||
943c246e | 929 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
930 | return; |
931 | } | |
932 | ||
47f7a071 | 933 | if (path->ah) { |
1da177e4 LT |
934 | ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
935 | be16_to_cpu(path->pathrec.dlid)); | |
936 | ||
721d67cd | 937 | spin_unlock_irqrestore(&priv->lock, flags); |
936d7de3 | 938 | ipoib_send(dev, skb, path->ah, IPOIB_QPN(cb->hwaddr)); |
721d67cd | 939 | return; |
1da177e4 LT |
940 | } else if ((path->query || !path_rec_start(dev, path)) && |
941 | skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { | |
1da177e4 LT |
942 | __skb_queue_tail(&path->queue, skb); |
943 | } else { | |
de903512 | 944 | ++dev->stats.tx_dropped; |
1da177e4 LT |
945 | dev_kfree_skb_any(skb); |
946 | } | |
947 | ||
943c246e | 948 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
949 | } |
950 | ||
951 | static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
952 | { | |
953 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
954 | struct ipoib_neigh *neigh; | |
b49fe362 | 955 | struct ipoib_cb *cb = ipoib_skb_cb(skb); |
b63b70d8 | 956 | struct ipoib_header *header; |
1da177e4 LT |
957 | unsigned long flags; |
958 | ||
b63b70d8 SP |
959 | header = (struct ipoib_header *) skb->data; |
960 | ||
961 | if (unlikely(cb->hwaddr[4] == 0xff)) { | |
962 | /* multicast, arrange "if" according to probability */ | |
963 | if ((header->proto != htons(ETH_P_IP)) && | |
964 | (header->proto != htons(ETH_P_IPV6)) && | |
965 | (header->proto != htons(ETH_P_ARP)) && | |
dc850b0e PM |
966 | (header->proto != htons(ETH_P_RARP)) && |
967 | (header->proto != htons(ETH_P_TIPC))) { | |
b63b70d8 | 968 | /* ethertype not supported by IPoIB */ |
17e6abee DM |
969 | ++dev->stats.tx_dropped; |
970 | dev_kfree_skb_any(skb); | |
b63b70d8 | 971 | return NETDEV_TX_OK; |
17e6abee | 972 | } |
b63b70d8 SP |
973 | /* Add in the P_Key for multicast*/ |
974 | cb->hwaddr[8] = (priv->pkey >> 8) & 0xff; | |
975 | cb->hwaddr[9] = priv->pkey & 0xff; | |
976 | ||
977 | neigh = ipoib_neigh_get(dev, cb->hwaddr); | |
978 | if (likely(neigh)) | |
979 | goto send_using_neigh; | |
980 | ipoib_mcast_send(dev, cb->hwaddr, skb); | |
981 | return NETDEV_TX_OK; | |
17e6abee | 982 | } |
1da177e4 | 983 | |
b63b70d8 SP |
984 | /* unicast, arrange "switch" according to probability */ |
985 | switch (header->proto) { | |
986 | case htons(ETH_P_IP): | |
987 | case htons(ETH_P_IPV6): | |
dc850b0e | 988 | case htons(ETH_P_TIPC): |
b63b70d8 SP |
989 | neigh = ipoib_neigh_get(dev, cb->hwaddr); |
990 | if (unlikely(!neigh)) { | |
991 | neigh_add_path(skb, cb->hwaddr, dev); | |
992 | return NETDEV_TX_OK; | |
a50df398 | 993 | } |
b63b70d8 SP |
994 | break; |
995 | case htons(ETH_P_ARP): | |
996 | case htons(ETH_P_RARP): | |
997 | /* for unicast ARP and RARP should always perform path find */ | |
998 | unicast_arp_send(skb, dev, cb); | |
999 | return NETDEV_TX_OK; | |
1000 | default: | |
1001 | /* ethertype not supported by IPoIB */ | |
1002 | ++dev->stats.tx_dropped; | |
1003 | dev_kfree_skb_any(skb); | |
1004 | return NETDEV_TX_OK; | |
1005 | } | |
8a7f7521 | 1006 | |
b63b70d8 SP |
1007 | send_using_neigh: |
1008 | /* note we now hold a ref to neigh */ | |
1009 | if (ipoib_cm_get(neigh)) { | |
1010 | if (ipoib_cm_up(neigh)) { | |
1011 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
1012 | goto unref; | |
1da177e4 | 1013 | } |
b63b70d8 SP |
1014 | } else if (neigh->ah) { |
1015 | ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(cb->hwaddr)); | |
1016 | goto unref; | |
1017 | } | |
1da177e4 | 1018 | |
b63b70d8 SP |
1019 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
1020 | spin_lock_irqsave(&priv->lock, flags); | |
1021 | __skb_queue_tail(&neigh->queue, skb); | |
1022 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 1023 | } else { |
b63b70d8 SP |
1024 | ++dev->stats.tx_dropped; |
1025 | dev_kfree_skb_any(skb); | |
1026 | } | |
1da177e4 | 1027 | |
b63b70d8 SP |
1028 | unref: |
1029 | ipoib_neigh_put(neigh); | |
1da177e4 | 1030 | |
1da177e4 LT |
1031 | return NETDEV_TX_OK; |
1032 | } | |
1033 | ||
1da177e4 LT |
1034 | static void ipoib_timeout(struct net_device *dev) |
1035 | { | |
1036 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1037 | ||
4b2d319b RD |
1038 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
1039 | jiffies_to_msecs(jiffies - dev->trans_start)); | |
1040 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", | |
1041 | netif_queue_stopped(dev), | |
1042 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
1043 | /* XXX reset QP, etc. */ |
1044 | } | |
1045 | ||
1046 | static int ipoib_hard_header(struct sk_buff *skb, | |
1047 | struct net_device *dev, | |
1048 | unsigned short type, | |
3b04ddde | 1049 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
1050 | { |
1051 | struct ipoib_header *header; | |
b49fe362 | 1052 | struct ipoib_cb *cb = ipoib_skb_cb(skb); |
1da177e4 LT |
1053 | |
1054 | header = (struct ipoib_header *) skb_push(skb, sizeof *header); | |
1055 | ||
1056 | header->proto = htons(type); | |
1057 | header->reserved = 0; | |
1058 | ||
1059 | /* | |
b63b70d8 | 1060 | * we don't rely on dst_entry structure, always stuff the |
936d7de3 RD |
1061 | * destination address into skb->cb so we can figure out where |
1062 | * to send the packet later. | |
1da177e4 | 1063 | */ |
b63b70d8 | 1064 | memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN); |
1da177e4 | 1065 | |
83bdd3b9 | 1066 | return sizeof *header; |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | static void ipoib_set_mcast_list(struct net_device *dev) | |
1070 | { | |
1071 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1072 | ||
7a343d4c LA |
1073 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
1074 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
1075 | return; | |
1076 | } | |
1077 | ||
0b39578b | 1078 | queue_work(priv->wq, &priv->restart_task); |
1da177e4 LT |
1079 | } |
1080 | ||
5aa7add8 ND |
1081 | static int ipoib_get_iflink(const struct net_device *dev) |
1082 | { | |
1083 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1084 | ||
2c153959 ES |
1085 | /* parent interface */ |
1086 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
1087 | return dev->ifindex; | |
1088 | ||
1089 | /* child/vlan interface */ | |
5aa7add8 ND |
1090 | return priv->parent->ifindex; |
1091 | } | |
1092 | ||
b63b70d8 | 1093 | static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) |
1da177e4 | 1094 | { |
b63b70d8 SP |
1095 | /* |
1096 | * Use only the address parts that contributes to spreading | |
1097 | * The subnet prefix is not used as one can not connect to | |
1098 | * same remote port (GUID) using the same remote QPN via two | |
1099 | * different subnets. | |
1100 | */ | |
1101 | /* qpn octets[1:4) & port GUID octets[12:20) */ | |
9d1ad66e | 1102 | u32 *d32 = (u32 *) daddr; |
b63b70d8 SP |
1103 | u32 hv; |
1104 | ||
9d1ad66e | 1105 | hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0); |
b63b70d8 SP |
1106 | return hv & htbl->mask; |
1107 | } | |
1108 | ||
1109 | struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr) | |
1110 | { | |
1111 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1112 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1113 | struct ipoib_neigh_hash *htbl; | |
1114 | struct ipoib_neigh *neigh = NULL; | |
1115 | u32 hash_val; | |
1116 | ||
1117 | rcu_read_lock_bh(); | |
1118 | ||
1119 | htbl = rcu_dereference_bh(ntbl->htbl); | |
1120 | ||
1121 | if (!htbl) | |
1122 | goto out_unlock; | |
1123 | ||
1124 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1125 | for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]); | |
1126 | neigh != NULL; | |
1127 | neigh = rcu_dereference_bh(neigh->hnext)) { | |
1128 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { | |
1129 | /* found, take one ref on behalf of the caller */ | |
1130 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1131 | /* deleted */ | |
1132 | neigh = NULL; | |
1133 | goto out_unlock; | |
1134 | } | |
1135 | neigh->alive = jiffies; | |
1136 | goto out_unlock; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | out_unlock: | |
1141 | rcu_read_unlock_bh(); | |
1142 | return neigh; | |
1143 | } | |
1144 | ||
1145 | static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv) | |
1146 | { | |
1147 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1148 | struct ipoib_neigh_hash *htbl; | |
1149 | unsigned long neigh_obsolete; | |
1150 | unsigned long dt; | |
1da177e4 | 1151 | unsigned long flags; |
b63b70d8 | 1152 | int i; |
bd99b2e0 | 1153 | LIST_HEAD(remove_list); |
1da177e4 | 1154 | |
b63b70d8 | 1155 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) |
732a2170 | 1156 | return; |
1da177e4 | 1157 | |
b5120a6e | 1158 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1159 | |
1160 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1161 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1162 | |
1163 | if (!htbl) | |
1164 | goto out_unlock; | |
1165 | ||
1166 | /* neigh is obsolete if it was idle for two GC periods */ | |
1167 | dt = 2 * arp_tbl.gc_interval; | |
1168 | neigh_obsolete = jiffies - dt; | |
1169 | /* handle possible race condition */ | |
1170 | if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
1171 | goto out_unlock; | |
1172 | ||
1173 | for (i = 0; i < htbl->size; i++) { | |
1174 | struct ipoib_neigh *neigh; | |
1175 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1176 | ||
1177 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1178 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1179 | /* was the neigh idle for two GC periods */ |
1180 | if (time_after(neigh_obsolete, neigh->alive)) { | |
bd99b2e0 | 1181 | |
432c55ff | 1182 | ipoib_check_and_add_mcast_sendonly(priv, neigh->daddr + 4, &remove_list); |
bd99b2e0 | 1183 | |
b63b70d8 SP |
1184 | rcu_assign_pointer(*np, |
1185 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1186 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1187 | /* remove from path/mc list */ |
b63b70d8 | 1188 | list_del(&neigh->list); |
b63b70d8 SP |
1189 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1190 | } else { | |
1191 | np = &neigh->hnext; | |
1192 | } | |
1da177e4 | 1193 | |
b63b70d8 SP |
1194 | } |
1195 | } | |
1da177e4 | 1196 | |
b63b70d8 | 1197 | out_unlock: |
b5120a6e | 1198 | spin_unlock_irqrestore(&priv->lock, flags); |
50be28de | 1199 | ipoib_mcast_remove_list(&remove_list); |
b63b70d8 | 1200 | } |
1da177e4 | 1201 | |
b63b70d8 SP |
1202 | static void ipoib_reap_neigh(struct work_struct *work) |
1203 | { | |
1204 | struct ipoib_dev_priv *priv = | |
1205 | container_of(work, struct ipoib_dev_priv, neigh_reap_task.work); | |
1206 | ||
1207 | __ipoib_reap_neigh(priv); | |
1208 | ||
1209 | if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) | |
0b39578b | 1210 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
b63b70d8 | 1211 | arp_tbl.gc_interval); |
1da177e4 LT |
1212 | } |
1213 | ||
b63b70d8 SP |
1214 | |
1215 | static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr, | |
732a2170 | 1216 | struct net_device *dev) |
d2e0655e MT |
1217 | { |
1218 | struct ipoib_neigh *neigh; | |
1219 | ||
b63b70d8 | 1220 | neigh = kzalloc(sizeof *neigh, GFP_ATOMIC); |
d2e0655e MT |
1221 | if (!neigh) |
1222 | return NULL; | |
1223 | ||
732a2170 | 1224 | neigh->dev = dev; |
b63b70d8 | 1225 | memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr)); |
82b39913 | 1226 | skb_queue_head_init(&neigh->queue); |
b63b70d8 | 1227 | INIT_LIST_HEAD(&neigh->list); |
839fcaba | 1228 | ipoib_cm_set(neigh, NULL); |
b63b70d8 SP |
1229 | /* one ref on behalf of the caller */ |
1230 | atomic_set(&neigh->refcnt, 1); | |
1231 | ||
1232 | return neigh; | |
1233 | } | |
1234 | ||
1235 | struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr, | |
1236 | struct net_device *dev) | |
1237 | { | |
1238 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1239 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1240 | struct ipoib_neigh_hash *htbl; | |
1241 | struct ipoib_neigh *neigh; | |
1242 | u32 hash_val; | |
1243 | ||
b63b70d8 | 1244 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1245 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1246 | if (!htbl) { |
1247 | neigh = NULL; | |
1248 | goto out_unlock; | |
1249 | } | |
1250 | ||
1251 | /* need to add a new neigh, but maybe some other thread succeeded? | |
1252 | * recalc hash, maybe hash resize took place so we do a search | |
1253 | */ | |
1254 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1255 | for (neigh = rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1256 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1257 | neigh != NULL; |
1258 | neigh = rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1259 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1260 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { |
1261 | /* found, take one ref on behalf of the caller */ | |
1262 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1263 | /* deleted */ | |
1264 | neigh = NULL; | |
1265 | break; | |
1266 | } | |
1267 | neigh->alive = jiffies; | |
1268 | goto out_unlock; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | neigh = ipoib_neigh_ctor(daddr, dev); | |
1273 | if (!neigh) | |
1274 | goto out_unlock; | |
1275 | ||
1276 | /* one ref on behalf of the hash table */ | |
1277 | atomic_inc(&neigh->refcnt); | |
1278 | neigh->alive = jiffies; | |
1279 | /* put in hash */ | |
1280 | rcu_assign_pointer(neigh->hnext, | |
1281 | rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1282 | lockdep_is_held(&priv->lock))); |
b63b70d8 SP |
1283 | rcu_assign_pointer(htbl->buckets[hash_val], neigh); |
1284 | atomic_inc(&ntbl->entries); | |
1285 | ||
1286 | out_unlock: | |
d2e0655e MT |
1287 | |
1288 | return neigh; | |
1289 | } | |
1290 | ||
b63b70d8 | 1291 | void ipoib_neigh_dtor(struct ipoib_neigh *neigh) |
d2e0655e | 1292 | { |
b63b70d8 SP |
1293 | /* neigh reference count was dropprd to zero */ |
1294 | struct net_device *dev = neigh->dev; | |
1295 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2745b5b7 | 1296 | struct sk_buff *skb; |
b63b70d8 SP |
1297 | if (neigh->ah) |
1298 | ipoib_put_ah(neigh->ah); | |
2745b5b7 | 1299 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 1300 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
1301 | dev_kfree_skb_any(skb); |
1302 | } | |
839fcaba MT |
1303 | if (ipoib_cm_get(neigh)) |
1304 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
b63b70d8 SP |
1305 | ipoib_dbg(netdev_priv(dev), |
1306 | "neigh free for %06x %pI6\n", | |
1307 | IPOIB_QPN(neigh->daddr), | |
1308 | neigh->daddr + 4); | |
d2e0655e | 1309 | kfree(neigh); |
b63b70d8 SP |
1310 | if (atomic_dec_and_test(&priv->ntbl.entries)) { |
1311 | if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags)) | |
1312 | complete(&priv->ntbl.flushed); | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | static void ipoib_neigh_reclaim(struct rcu_head *rp) | |
1317 | { | |
1318 | /* Called as a result of removal from hash table */ | |
1319 | struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu); | |
1320 | /* note TX context may hold another ref */ | |
1321 | ipoib_neigh_put(neigh); | |
d2e0655e MT |
1322 | } |
1323 | ||
b63b70d8 | 1324 | void ipoib_neigh_free(struct ipoib_neigh *neigh) |
1da177e4 | 1325 | { |
b63b70d8 SP |
1326 | struct net_device *dev = neigh->dev; |
1327 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1328 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1329 | struct ipoib_neigh_hash *htbl; | |
1330 | struct ipoib_neigh __rcu **np; | |
1331 | struct ipoib_neigh *n; | |
1332 | u32 hash_val; | |
1333 | ||
b63b70d8 | 1334 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1335 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1336 | if (!htbl) |
b5120a6e | 1337 | return; |
b63b70d8 SP |
1338 | |
1339 | hash_val = ipoib_addr_hash(htbl, neigh->daddr); | |
1340 | np = &htbl->buckets[hash_val]; | |
1341 | for (n = rcu_dereference_protected(*np, | |
b5120a6e | 1342 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1343 | n != NULL; |
6c723a68 | 1344 | n = rcu_dereference_protected(*np, |
b5120a6e | 1345 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1346 | if (n == neigh) { |
1347 | /* found */ | |
1348 | rcu_assign_pointer(*np, | |
1349 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1350 | lockdep_is_held(&priv->lock))); |
49b8e744 JF |
1351 | /* remove from parent list */ |
1352 | list_del(&neigh->list); | |
b63b70d8 | 1353 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
b5120a6e | 1354 | return; |
b63b70d8 SP |
1355 | } else { |
1356 | np = &n->hnext; | |
1357 | } | |
1358 | } | |
b63b70d8 SP |
1359 | } |
1360 | ||
1361 | static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) | |
1362 | { | |
1363 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1364 | struct ipoib_neigh_hash *htbl; | |
52374967 | 1365 | struct ipoib_neigh __rcu **buckets; |
b63b70d8 SP |
1366 | u32 size; |
1367 | ||
1368 | clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); | |
1369 | ntbl->htbl = NULL; | |
b63b70d8 SP |
1370 | htbl = kzalloc(sizeof(*htbl), GFP_KERNEL); |
1371 | if (!htbl) | |
1372 | return -ENOMEM; | |
1373 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1374 | size = roundup_pow_of_two(arp_tbl.gc_thresh3); | |
1375 | buckets = kzalloc(size * sizeof(*buckets), GFP_KERNEL); | |
1376 | if (!buckets) { | |
1377 | kfree(htbl); | |
1378 | return -ENOMEM; | |
1379 | } | |
1380 | htbl->size = size; | |
1381 | htbl->mask = (size - 1); | |
1382 | htbl->buckets = buckets; | |
52374967 | 1383 | RCU_INIT_POINTER(ntbl->htbl, htbl); |
66172c09 | 1384 | htbl->ntbl = ntbl; |
b63b70d8 SP |
1385 | atomic_set(&ntbl->entries, 0); |
1386 | ||
1387 | /* start garbage collection */ | |
1388 | clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
0b39578b | 1389 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
b63b70d8 | 1390 | arp_tbl.gc_interval); |
1da177e4 LT |
1391 | |
1392 | return 0; | |
1393 | } | |
1394 | ||
b63b70d8 SP |
1395 | static void neigh_hash_free_rcu(struct rcu_head *head) |
1396 | { | |
1397 | struct ipoib_neigh_hash *htbl = container_of(head, | |
1398 | struct ipoib_neigh_hash, | |
1399 | rcu); | |
1400 | struct ipoib_neigh __rcu **buckets = htbl->buckets; | |
66172c09 | 1401 | struct ipoib_neigh_table *ntbl = htbl->ntbl; |
b63b70d8 SP |
1402 | |
1403 | kfree(buckets); | |
1404 | kfree(htbl); | |
66172c09 | 1405 | complete(&ntbl->deleted); |
b63b70d8 SP |
1406 | } |
1407 | ||
1408 | void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid) | |
1409 | { | |
1410 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1411 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1412 | struct ipoib_neigh_hash *htbl; | |
1413 | unsigned long flags; | |
1414 | int i; | |
1415 | ||
1416 | /* remove all neigh connected to a given path or mcast */ | |
b5120a6e | 1417 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1418 | |
1419 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1420 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1421 | |
1422 | if (!htbl) | |
1423 | goto out_unlock; | |
1424 | ||
1425 | for (i = 0; i < htbl->size; i++) { | |
1426 | struct ipoib_neigh *neigh; | |
1427 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1428 | ||
1429 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1430 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1431 | /* delete neighs belong to this parent */ |
1432 | if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) { | |
1433 | rcu_assign_pointer(*np, | |
1434 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1435 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1436 | /* remove from parent list */ |
b63b70d8 | 1437 | list_del(&neigh->list); |
b63b70d8 SP |
1438 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1439 | } else { | |
1440 | np = &neigh->hnext; | |
1441 | } | |
1442 | ||
1443 | } | |
1444 | } | |
1445 | out_unlock: | |
b5120a6e | 1446 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 SP |
1447 | } |
1448 | ||
1449 | static void ipoib_flush_neighs(struct ipoib_dev_priv *priv) | |
1450 | { | |
1451 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1452 | struct ipoib_neigh_hash *htbl; | |
1453 | unsigned long flags; | |
66172c09 | 1454 | int i, wait_flushed = 0; |
b63b70d8 | 1455 | |
66172c09 | 1456 | init_completion(&priv->ntbl.flushed); |
b63b70d8 | 1457 | |
b5120a6e | 1458 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1459 | |
1460 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1461 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1462 | if (!htbl) |
1463 | goto out_unlock; | |
1464 | ||
66172c09 SP |
1465 | wait_flushed = atomic_read(&priv->ntbl.entries); |
1466 | if (!wait_flushed) | |
1467 | goto free_htbl; | |
1468 | ||
b63b70d8 SP |
1469 | for (i = 0; i < htbl->size; i++) { |
1470 | struct ipoib_neigh *neigh; | |
1471 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1472 | ||
1473 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1474 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1475 | rcu_assign_pointer(*np, |
1476 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1477 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1478 | /* remove from path/mc list */ |
b63b70d8 | 1479 | list_del(&neigh->list); |
b63b70d8 SP |
1480 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1481 | } | |
1482 | } | |
1483 | ||
66172c09 | 1484 | free_htbl: |
b63b70d8 SP |
1485 | rcu_assign_pointer(ntbl->htbl, NULL); |
1486 | call_rcu(&htbl->rcu, neigh_hash_free_rcu); | |
1487 | ||
1488 | out_unlock: | |
b5120a6e | 1489 | spin_unlock_irqrestore(&priv->lock, flags); |
66172c09 SP |
1490 | if (wait_flushed) |
1491 | wait_for_completion(&priv->ntbl.flushed); | |
b63b70d8 SP |
1492 | } |
1493 | ||
1494 | static void ipoib_neigh_hash_uninit(struct net_device *dev) | |
1495 | { | |
1496 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1497 | int stopped; | |
1498 | ||
1499 | ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n"); | |
66172c09 | 1500 | init_completion(&priv->ntbl.deleted); |
b63b70d8 SP |
1501 | set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); |
1502 | ||
1503 | /* Stop GC if called at init fail need to cancel work */ | |
1504 | stopped = test_and_set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1505 | if (!stopped) | |
1506 | cancel_delayed_work(&priv->neigh_reap_task); | |
1507 | ||
66172c09 SP |
1508 | ipoib_flush_neighs(priv); |
1509 | ||
1510 | wait_for_completion(&priv->ntbl.deleted); | |
b63b70d8 SP |
1511 | } |
1512 | ||
1513 | ||
1da177e4 LT |
1514 | int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) |
1515 | { | |
1516 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1517 | ||
1518 | /* Allocate RX/TX "rings" to hold queued skbs */ | |
0f485251 | 1519 | priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, |
1da177e4 LT |
1520 | GFP_KERNEL); |
1521 | if (!priv->rx_ring) { | |
1522 | printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", | |
0f485251 | 1523 | ca->name, ipoib_recvq_size); |
be7aa663 | 1524 | goto out; |
1da177e4 | 1525 | } |
1da177e4 | 1526 | |
948579cd | 1527 | priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring); |
1da177e4 LT |
1528 | if (!priv->tx_ring) { |
1529 | printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", | |
0f485251 | 1530 | ca->name, ipoib_sendq_size); |
1da177e4 LT |
1531 | goto out_rx_ring_cleanup; |
1532 | } | |
1da177e4 | 1533 | |
1b524963 | 1534 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 LT |
1535 | |
1536 | if (ipoib_ib_dev_init(dev, ca, port)) | |
1537 | goto out_tx_ring_cleanup; | |
1538 | ||
be7aa663 DL |
1539 | /* |
1540 | * Must be after ipoib_ib_dev_init so we can allocate a per | |
1541 | * device wq there and use it here | |
1542 | */ | |
1543 | if (ipoib_neigh_hash_init(priv) < 0) | |
1544 | goto out_dev_uninit; | |
1545 | ||
1da177e4 LT |
1546 | return 0; |
1547 | ||
be7aa663 DL |
1548 | out_dev_uninit: |
1549 | ipoib_ib_dev_cleanup(dev); | |
1550 | ||
1da177e4 | 1551 | out_tx_ring_cleanup: |
10313cbb | 1552 | vfree(priv->tx_ring); |
1da177e4 LT |
1553 | |
1554 | out_rx_ring_cleanup: | |
1555 | kfree(priv->rx_ring); | |
1556 | ||
1557 | out: | |
1558 | return -ENOMEM; | |
1559 | } | |
1560 | ||
1561 | void ipoib_dev_cleanup(struct net_device *dev) | |
1562 | { | |
1563 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; | |
9baa0b03 OG |
1564 | LIST_HEAD(head); |
1565 | ||
1566 | ASSERT_RTNL(); | |
1da177e4 | 1567 | |
1732b0ef | 1568 | ipoib_delete_debug_files(dev); |
1da177e4 LT |
1569 | |
1570 | /* Delete any child interfaces first */ | |
1571 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { | |
b63b70d8 SP |
1572 | /* Stop GC on child */ |
1573 | set_bit(IPOIB_STOP_NEIGH_GC, &cpriv->flags); | |
1574 | cancel_delayed_work(&cpriv->neigh_reap_task); | |
9baa0b03 | 1575 | unregister_netdevice_queue(cpriv->dev, &head); |
1da177e4 | 1576 | } |
9baa0b03 | 1577 | unregister_netdevice_many(&head); |
1da177e4 | 1578 | |
be7aa663 DL |
1579 | /* |
1580 | * Must be before ipoib_ib_dev_cleanup or we delete an in use | |
1581 | * work queue | |
1582 | */ | |
1583 | ipoib_neigh_hash_uninit(dev); | |
1584 | ||
1da177e4 LT |
1585 | ipoib_ib_dev_cleanup(dev); |
1586 | ||
92a6b34b | 1587 | kfree(priv->rx_ring); |
10313cbb | 1588 | vfree(priv->tx_ring); |
1da177e4 | 1589 | |
92a6b34b HR |
1590 | priv->rx_ring = NULL; |
1591 | priv->tx_ring = NULL; | |
1da177e4 LT |
1592 | } |
1593 | ||
9c3c5f8e EC |
1594 | static int ipoib_set_vf_link_state(struct net_device *dev, int vf, int link_state) |
1595 | { | |
1596 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1597 | ||
1598 | return ib_set_vf_link_state(priv->ca, vf, priv->port, link_state); | |
1599 | } | |
1600 | ||
1601 | static int ipoib_get_vf_config(struct net_device *dev, int vf, | |
1602 | struct ifla_vf_info *ivf) | |
1603 | { | |
1604 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1605 | int err; | |
1606 | ||
1607 | err = ib_get_vf_config(priv->ca, vf, priv->port, ivf); | |
1608 | if (err) | |
1609 | return err; | |
1610 | ||
1611 | ivf->vf = vf; | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | static int ipoib_set_vf_guid(struct net_device *dev, int vf, u64 guid, int type) | |
1617 | { | |
1618 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1619 | ||
1620 | if (type != IFLA_VF_IB_NODE_GUID && type != IFLA_VF_IB_PORT_GUID) | |
1621 | return -EINVAL; | |
1622 | ||
1623 | return ib_set_vf_guid(priv->ca, vf, priv->port, guid, type); | |
1624 | } | |
1625 | ||
1626 | static int ipoib_get_vf_stats(struct net_device *dev, int vf, | |
1627 | struct ifla_vf_stats *vf_stats) | |
1628 | { | |
1629 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1630 | ||
1631 | return ib_get_vf_stats(priv->ca, vf, priv->port, vf_stats); | |
1632 | } | |
1633 | ||
3b04ddde SH |
1634 | static const struct header_ops ipoib_header_ops = { |
1635 | .create = ipoib_hard_header, | |
1636 | }; | |
1637 | ||
9c3c5f8e EC |
1638 | static const struct net_device_ops ipoib_netdev_ops_pf = { |
1639 | .ndo_uninit = ipoib_uninit, | |
1640 | .ndo_open = ipoib_open, | |
1641 | .ndo_stop = ipoib_stop, | |
1642 | .ndo_change_mtu = ipoib_change_mtu, | |
1643 | .ndo_fix_features = ipoib_fix_features, | |
1644 | .ndo_start_xmit = ipoib_start_xmit, | |
1645 | .ndo_tx_timeout = ipoib_timeout, | |
1646 | .ndo_set_rx_mode = ipoib_set_mcast_list, | |
1647 | .ndo_get_iflink = ipoib_get_iflink, | |
1648 | .ndo_set_vf_link_state = ipoib_set_vf_link_state, | |
1649 | .ndo_get_vf_config = ipoib_get_vf_config, | |
1650 | .ndo_get_vf_stats = ipoib_get_vf_stats, | |
1651 | .ndo_set_vf_guid = ipoib_set_vf_guid, | |
1652 | }; | |
1653 | ||
1654 | static const struct net_device_ops ipoib_netdev_ops_vf = { | |
9baa0b03 | 1655 | .ndo_uninit = ipoib_uninit, |
fe8114e8 SH |
1656 | .ndo_open = ipoib_open, |
1657 | .ndo_stop = ipoib_stop, | |
1658 | .ndo_change_mtu = ipoib_change_mtu, | |
3d96c74d | 1659 | .ndo_fix_features = ipoib_fix_features, |
fe8114e8 SH |
1660 | .ndo_start_xmit = ipoib_start_xmit, |
1661 | .ndo_tx_timeout = ipoib_timeout, | |
afc4b13d | 1662 | .ndo_set_rx_mode = ipoib_set_mcast_list, |
5aa7add8 | 1663 | .ndo_get_iflink = ipoib_get_iflink, |
fe8114e8 SH |
1664 | }; |
1665 | ||
9baa0b03 | 1666 | void ipoib_setup(struct net_device *dev) |
1da177e4 LT |
1667 | { |
1668 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1669 | ||
9c3c5f8e EC |
1670 | if (priv->hca_caps & IB_DEVICE_VIRTUAL_FUNCTION) |
1671 | dev->netdev_ops = &ipoib_netdev_ops_vf; | |
1672 | else | |
1673 | dev->netdev_ops = &ipoib_netdev_ops_pf; | |
1674 | ||
2337f809 | 1675 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 1676 | |
82c24c18 EC |
1677 | ipoib_set_ethtool_ops(dev); |
1678 | ||
7f1a3867 | 1679 | netif_napi_add(dev, &priv->napi, ipoib_poll, NAPI_POLL_WEIGHT); |
1da177e4 | 1680 | |
2337f809 | 1681 | dev->watchdog_timeo = HZ; |
1da177e4 | 1682 | |
2337f809 | 1683 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 | 1684 | |
936d7de3 | 1685 | dev->hard_header_len = IPOIB_ENCAP_LEN; |
2337f809 RD |
1686 | dev->addr_len = INFINIBAND_ALEN; |
1687 | dev->type = ARPHRD_INFINIBAND; | |
1688 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 1689 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 1690 | NETIF_F_HIGHDMA); |
02875878 | 1691 | netif_keep_dst(dev); |
1da177e4 | 1692 | |
1da177e4 LT |
1693 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
1694 | ||
1da177e4 LT |
1695 | priv->dev = dev; |
1696 | ||
1697 | spin_lock_init(&priv->lock); | |
1da177e4 | 1698 | |
f47944cc | 1699 | init_rwsem(&priv->vlan_rwsem); |
1da177e4 LT |
1700 | |
1701 | INIT_LIST_HEAD(&priv->path_list); | |
1702 | INIT_LIST_HEAD(&priv->child_intfs); | |
1703 | INIT_LIST_HEAD(&priv->dead_ahs); | |
1704 | INIT_LIST_HEAD(&priv->multicast_list); | |
1705 | ||
c4028958 | 1706 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 1707 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
1708 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
1709 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
1710 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
1711 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
1712 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
b63b70d8 | 1713 | INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh); |
1da177e4 LT |
1714 | } |
1715 | ||
1716 | struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) | |
1717 | { | |
1718 | struct net_device *dev; | |
1719 | ||
c835a677 TG |
1720 | dev = alloc_netdev((int)sizeof(struct ipoib_dev_priv), name, |
1721 | NET_NAME_UNKNOWN, ipoib_setup); | |
1da177e4 LT |
1722 | if (!dev) |
1723 | return NULL; | |
1724 | ||
1725 | return netdev_priv(dev); | |
1726 | } | |
1727 | ||
43cb76d9 GKH |
1728 | static ssize_t show_pkey(struct device *dev, |
1729 | struct device_attribute *attr, char *buf) | |
1da177e4 | 1730 | { |
43cb76d9 | 1731 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); |
1da177e4 LT |
1732 | |
1733 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
1734 | } | |
43cb76d9 | 1735 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 1736 | |
335a64a5 OG |
1737 | static ssize_t show_umcast(struct device *dev, |
1738 | struct device_attribute *attr, char *buf) | |
1739 | { | |
1740 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); | |
1741 | ||
1742 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
1743 | } | |
1744 | ||
862096a8 | 1745 | void ipoib_set_umcast(struct net_device *ndev, int umcast_val) |
335a64a5 | 1746 | { |
862096a8 | 1747 | struct ipoib_dev_priv *priv = netdev_priv(ndev); |
335a64a5 OG |
1748 | |
1749 | if (umcast_val > 0) { | |
1750 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
1751 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
1752 | "by userspace\n"); | |
1753 | } else | |
1754 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
862096a8 OG |
1755 | } |
1756 | ||
1757 | static ssize_t set_umcast(struct device *dev, | |
1758 | struct device_attribute *attr, | |
1759 | const char *buf, size_t count) | |
1760 | { | |
1761 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
1762 | ||
1763 | ipoib_set_umcast(to_net_dev(dev), umcast_val); | |
335a64a5 OG |
1764 | |
1765 | return count; | |
1766 | } | |
1767 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
1768 | ||
1769 | int ipoib_add_umcast_attr(struct net_device *dev) | |
1770 | { | |
1771 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
1772 | } | |
1773 | ||
43cb76d9 GKH |
1774 | static ssize_t create_child(struct device *dev, |
1775 | struct device_attribute *attr, | |
1da177e4 LT |
1776 | const char *buf, size_t count) |
1777 | { | |
1778 | int pkey; | |
1779 | int ret; | |
1780 | ||
1781 | if (sscanf(buf, "%i", &pkey) != 1) | |
1782 | return -EINVAL; | |
1783 | ||
3d790a4c | 1784 | if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000) |
1da177e4 LT |
1785 | return -EINVAL; |
1786 | ||
4ce05937 RD |
1787 | /* |
1788 | * Set the full membership bit, so that we join the right | |
1789 | * broadcast group, etc. | |
1790 | */ | |
1791 | pkey |= 0x8000; | |
1792 | ||
43cb76d9 | 1793 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
1794 | |
1795 | return ret ? ret : count; | |
1796 | } | |
7a52b34b | 1797 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 1798 | |
43cb76d9 GKH |
1799 | static ssize_t delete_child(struct device *dev, |
1800 | struct device_attribute *attr, | |
1da177e4 LT |
1801 | const char *buf, size_t count) |
1802 | { | |
1803 | int pkey; | |
1804 | int ret; | |
1805 | ||
1806 | if (sscanf(buf, "%i", &pkey) != 1) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | if (pkey < 0 || pkey > 0xffff) | |
1810 | return -EINVAL; | |
1811 | ||
43cb76d9 | 1812 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
1813 | |
1814 | return ret ? ret : count; | |
1815 | ||
1816 | } | |
7a52b34b | 1817 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
1818 | |
1819 | int ipoib_add_pkey_attr(struct net_device *dev) | |
1820 | { | |
43cb76d9 | 1821 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
1822 | } |
1823 | ||
83bb63f6 OG |
1824 | int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) |
1825 | { | |
4a061b28 | 1826 | priv->hca_caps = hca->attrs.device_cap_flags; |
83bb63f6 OG |
1827 | |
1828 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
3d96c74d MM |
1829 | priv->dev->hw_features = NETIF_F_SG | |
1830 | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; | |
83bb63f6 | 1831 | |
3d96c74d MM |
1832 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
1833 | priv->dev->hw_features |= NETIF_F_TSO; | |
8ae31e5b | 1834 | |
3d96c74d MM |
1835 | priv->dev->features |= priv->dev->hw_features; |
1836 | } | |
83bb63f6 OG |
1837 | |
1838 | return 0; | |
1839 | } | |
1840 | ||
1da177e4 LT |
1841 | static struct net_device *ipoib_add_port(const char *format, |
1842 | struct ib_device *hca, u8 port) | |
1843 | { | |
1844 | struct ipoib_dev_priv *priv; | |
bc7b3a36 | 1845 | struct ib_port_attr attr; |
1da177e4 LT |
1846 | int result = -ENOMEM; |
1847 | ||
1848 | priv = ipoib_intf_alloc(format); | |
1849 | if (!priv) | |
1850 | goto alloc_mem_failed; | |
1851 | ||
1852 | SET_NETDEV_DEV(priv->dev, hca->dma_device); | |
c3aa9b18 | 1853 | priv->dev->dev_id = port - 1; |
1da177e4 | 1854 | |
58e9cc90 AV |
1855 | result = ib_query_port(hca, port, &attr); |
1856 | if (!result) | |
bc7b3a36 SM |
1857 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); |
1858 | else { | |
1859 | printk(KERN_WARNING "%s: ib_query_port %d failed\n", | |
1860 | hca->name, port); | |
1861 | goto device_init_failed; | |
1862 | } | |
1863 | ||
1864 | /* MTU will be reset when mcast join happens */ | |
1865 | priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1866 | priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; | |
1867 | ||
596b9b68 DM |
1868 | priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh); |
1869 | ||
1da177e4 LT |
1870 | result = ib_query_pkey(hca, port, 0, &priv->pkey); |
1871 | if (result) { | |
1872 | printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1873 | hca->name, port, result); | |
ca6de177 | 1874 | goto device_init_failed; |
1da177e4 LT |
1875 | } |
1876 | ||
58e9cc90 AV |
1877 | result = ipoib_set_dev_features(priv, hca); |
1878 | if (result) | |
6046136c | 1879 | goto device_init_failed; |
af40da89 | 1880 | |
4ce05937 RD |
1881 | /* |
1882 | * Set the full membership bit, so that we join the right | |
1883 | * broadcast group, etc. | |
1884 | */ | |
1885 | priv->pkey |= 0x8000; | |
1886 | ||
1da177e4 LT |
1887 | priv->dev->broadcast[8] = priv->pkey >> 8; |
1888 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1889 | ||
55ee3ab2 | 1890 | result = ib_query_gid(hca, port, 0, &priv->local_gid, NULL); |
1da177e4 LT |
1891 | if (result) { |
1892 | printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", | |
1893 | hca->name, port, result); | |
ca6de177 | 1894 | goto device_init_failed; |
1da177e4 LT |
1895 | } else |
1896 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
1897 | ||
1da177e4 LT |
1898 | result = ipoib_dev_init(priv->dev, hca, port); |
1899 | if (result < 0) { | |
1900 | printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", | |
1901 | hca->name, port, result); | |
1902 | goto device_init_failed; | |
1903 | } | |
1904 | ||
1905 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
1906 | priv->ca, ipoib_event); | |
1907 | result = ib_register_event_handler(&priv->event_handler); | |
1908 | if (result < 0) { | |
1909 | printk(KERN_WARNING "%s: ib_register_event_handler failed for " | |
1910 | "port %d (ret = %d)\n", | |
1911 | hca->name, port, result); | |
1912 | goto event_failed; | |
1913 | } | |
1914 | ||
1915 | result = register_netdev(priv->dev); | |
1916 | if (result) { | |
1917 | printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", | |
1918 | hca->name, port, result); | |
1919 | goto register_failed; | |
1920 | } | |
1921 | ||
1732b0ef | 1922 | ipoib_create_debug_files(priv->dev); |
1da177e4 | 1923 | |
839fcaba MT |
1924 | if (ipoib_cm_add_mode_attr(priv->dev)) |
1925 | goto sysfs_failed; | |
1da177e4 LT |
1926 | if (ipoib_add_pkey_attr(priv->dev)) |
1927 | goto sysfs_failed; | |
335a64a5 OG |
1928 | if (ipoib_add_umcast_attr(priv->dev)) |
1929 | goto sysfs_failed; | |
43cb76d9 | 1930 | if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) |
1da177e4 | 1931 | goto sysfs_failed; |
43cb76d9 | 1932 | if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
1933 | goto sysfs_failed; |
1934 | ||
1935 | return priv->dev; | |
1936 | ||
1937 | sysfs_failed: | |
1732b0ef | 1938 | ipoib_delete_debug_files(priv->dev); |
1da177e4 LT |
1939 | unregister_netdev(priv->dev); |
1940 | ||
1941 | register_failed: | |
1942 | ib_unregister_event_handler(&priv->event_handler); | |
0b39578b | 1943 | flush_workqueue(ipoib_workqueue); |
b63b70d8 SP |
1944 | /* Stop GC if started before flush */ |
1945 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
1946 | cancel_delayed_work(&priv->neigh_reap_task); | |
0b39578b | 1947 | flush_workqueue(priv->wq); |
1da177e4 LT |
1948 | |
1949 | event_failed: | |
1950 | ipoib_dev_cleanup(priv->dev); | |
1951 | ||
1952 | device_init_failed: | |
1953 | free_netdev(priv->dev); | |
1954 | ||
1955 | alloc_mem_failed: | |
1956 | return ERR_PTR(result); | |
1957 | } | |
1958 | ||
1959 | static void ipoib_add_one(struct ib_device *device) | |
1960 | { | |
1961 | struct list_head *dev_list; | |
1962 | struct net_device *dev; | |
1963 | struct ipoib_dev_priv *priv; | |
4139032b | 1964 | int p; |
8e37ab68 | 1965 | int count = 0; |
07ebafba | 1966 | |
1da177e4 LT |
1967 | dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); |
1968 | if (!dev_list) | |
1969 | return; | |
1970 | ||
1971 | INIT_LIST_HEAD(dev_list); | |
1972 | ||
4139032b | 1973 | for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) { |
8e37ab68 | 1974 | if (!rdma_protocol_ib(device, p)) |
7b4c8769 | 1975 | continue; |
1da177e4 LT |
1976 | dev = ipoib_add_port("ib%d", device, p); |
1977 | if (!IS_ERR(dev)) { | |
1978 | priv = netdev_priv(dev); | |
1979 | list_add_tail(&priv->list, dev_list); | |
8e37ab68 | 1980 | count++; |
1da177e4 LT |
1981 | } |
1982 | } | |
1983 | ||
8e37ab68 MW |
1984 | if (!count) { |
1985 | kfree(dev_list); | |
1986 | return; | |
1987 | } | |
1988 | ||
1da177e4 LT |
1989 | ib_set_client_data(device, &ipoib_client, dev_list); |
1990 | } | |
1991 | ||
7c1eb45a | 1992 | static void ipoib_remove_one(struct ib_device *device, void *client_data) |
1da177e4 LT |
1993 | { |
1994 | struct ipoib_dev_priv *priv, *tmp; | |
7c1eb45a | 1995 | struct list_head *dev_list = client_data; |
1da177e4 | 1996 | |
5a2815f0 IG |
1997 | if (!dev_list) |
1998 | return; | |
1da177e4 LT |
1999 | |
2000 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
2001 | ib_unregister_event_handler(&priv->event_handler); | |
0b39578b | 2002 | flush_workqueue(ipoib_workqueue); |
a77a57a1 RD |
2003 | |
2004 | rtnl_lock(); | |
2005 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
2006 | rtnl_unlock(); | |
2007 | ||
b63b70d8 SP |
2008 | /* Stop GC */ |
2009 | set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); | |
2010 | cancel_delayed_work(&priv->neigh_reap_task); | |
0b39578b | 2011 | flush_workqueue(priv->wq); |
1da177e4 LT |
2012 | |
2013 | unregister_netdev(priv->dev); | |
1da177e4 LT |
2014 | free_netdev(priv->dev); |
2015 | } | |
06c56e44 MT |
2016 | |
2017 | kfree(dev_list); | |
1da177e4 LT |
2018 | } |
2019 | ||
2020 | static int __init ipoib_init_module(void) | |
2021 | { | |
2022 | int ret; | |
2023 | ||
0f485251 SM |
2024 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
2025 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
2026 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
2027 | ||
2028 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
2029 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
732eacc0 | 2030 | ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); |
68e995a2 PS |
2031 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
2032 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
2033 | #endif | |
0f485251 | 2034 | |
f89271da EC |
2035 | /* |
2036 | * When copying small received packets, we only copy from the | |
2037 | * linear data part of the SKB, so we rely on this condition. | |
2038 | */ | |
2039 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
2040 | ||
1da177e4 LT |
2041 | ret = ipoib_register_debugfs(); |
2042 | if (ret) | |
2043 | return ret; | |
2044 | ||
2045 | /* | |
0b39578b DL |
2046 | * We create a global workqueue here that is used for all flush |
2047 | * operations. However, if you attempt to flush a workqueue | |
2048 | * from a task on that same workqueue, it deadlocks the system. | |
2049 | * We want to be able to flush the tasks associated with a | |
2050 | * specific net device, so we also create a workqueue for each | |
2051 | * netdevice. We queue up the tasks for that device only on | |
2052 | * its private workqueue, and we only queue up flush events | |
2053 | * on our global flush workqueue. This avoids the deadlocks. | |
1da177e4 | 2054 | */ |
0b39578b | 2055 | ipoib_workqueue = create_singlethread_workqueue("ipoib_flush"); |
1da177e4 LT |
2056 | if (!ipoib_workqueue) { |
2057 | ret = -ENOMEM; | |
2058 | goto err_fs; | |
2059 | } | |
2060 | ||
c1a0b23b MT |
2061 | ib_sa_register_client(&ipoib_sa_client); |
2062 | ||
1da177e4 LT |
2063 | ret = ib_register_client(&ipoib_client); |
2064 | if (ret) | |
c1a0b23b | 2065 | goto err_sa; |
1da177e4 | 2066 | |
9baa0b03 OG |
2067 | ret = ipoib_netlink_init(); |
2068 | if (ret) | |
2069 | goto err_client; | |
2070 | ||
1da177e4 LT |
2071 | return 0; |
2072 | ||
9baa0b03 OG |
2073 | err_client: |
2074 | ib_unregister_client(&ipoib_client); | |
2075 | ||
c1a0b23b MT |
2076 | err_sa: |
2077 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
2078 | destroy_workqueue(ipoib_workqueue); |
2079 | ||
9adec1a8 RD |
2080 | err_fs: |
2081 | ipoib_unregister_debugfs(); | |
2082 | ||
1da177e4 LT |
2083 | return ret; |
2084 | } | |
2085 | ||
2086 | static void __exit ipoib_cleanup_module(void) | |
2087 | { | |
9baa0b03 | 2088 | ipoib_netlink_fini(); |
1da177e4 | 2089 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 2090 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 2091 | ipoib_unregister_debugfs(); |
1da177e4 LT |
2092 | destroy_workqueue(ipoib_workqueue); |
2093 | } | |
2094 | ||
2095 | module_init(ipoib_init_module); | |
2096 | module_exit(ipoib_cleanup_module); |