Commit | Line | Data |
---|---|---|
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"); | |
62 | ||
0f485251 SM |
63 | int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; |
64 | int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; | |
65 | ||
66 | module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); | |
67 | MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); | |
68 | module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); | |
69 | MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); | |
70 | ||
1da177e4 LT |
71 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
72 | int ipoib_debug_level; | |
73 | ||
74 | module_param_named(debug_level, ipoib_debug_level, int, 0644); | |
75 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
76 | #endif | |
77 | ||
1732b0ef RD |
78 | struct ipoib_path_iter { |
79 | struct net_device *dev; | |
80 | struct ipoib_path path; | |
81 | }; | |
82 | ||
1da177e4 LT |
83 | static const u8 ipv4_bcast_addr[] = { |
84 | 0x00, 0xff, 0xff, 0xff, | |
85 | 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, | |
86 | 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff | |
87 | }; | |
88 | ||
89 | struct workqueue_struct *ipoib_workqueue; | |
90 | ||
c1a0b23b MT |
91 | struct ib_sa_client ipoib_sa_client; |
92 | ||
1da177e4 | 93 | static void ipoib_add_one(struct ib_device *device); |
7c1eb45a | 94 | static void ipoib_remove_one(struct ib_device *device, void *client_data); |
b63b70d8 | 95 | static void ipoib_neigh_reclaim(struct rcu_head *rp); |
ddde896e GS |
96 | static struct net_device *ipoib_get_net_dev_by_params( |
97 | struct ib_device *dev, u8 port, u16 pkey, | |
98 | const union ib_gid *gid, const struct sockaddr *addr, | |
99 | void *client_data); | |
492a7e67 | 100 | static int ipoib_set_mac(struct net_device *dev, void *addr); |
31a82362 FD |
101 | static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr, |
102 | int cmd); | |
1da177e4 LT |
103 | |
104 | static struct ib_client ipoib_client = { | |
105 | .name = "ipoib", | |
106 | .add = ipoib_add_one, | |
ddde896e GS |
107 | .remove = ipoib_remove_one, |
108 | .get_net_dev_by_params = ipoib_get_net_dev_by_params, | |
1da177e4 LT |
109 | }; |
110 | ||
771a5258 SR |
111 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
112 | static int ipoib_netdev_event(struct notifier_block *this, | |
113 | unsigned long event, void *ptr) | |
114 | { | |
115 | struct netdev_notifier_info *ni = ptr; | |
116 | struct net_device *dev = ni->dev; | |
117 | ||
118 | if (dev->netdev_ops->ndo_open != ipoib_open) | |
119 | return NOTIFY_DONE; | |
120 | ||
121 | switch (event) { | |
122 | case NETDEV_REGISTER: | |
123 | ipoib_create_debug_files(dev); | |
124 | break; | |
125 | case NETDEV_CHANGENAME: | |
126 | ipoib_delete_debug_files(dev); | |
127 | ipoib_create_debug_files(dev); | |
128 | break; | |
129 | case NETDEV_UNREGISTER: | |
130 | ipoib_delete_debug_files(dev); | |
131 | break; | |
132 | } | |
133 | ||
134 | return NOTIFY_DONE; | |
135 | } | |
136 | #endif | |
137 | ||
1da177e4 LT |
138 | int ipoib_open(struct net_device *dev) |
139 | { | |
c1048aff | 140 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
141 | |
142 | ipoib_dbg(priv, "bringing up interface\n"); | |
143 | ||
437708c4 MS |
144 | netif_carrier_off(dev); |
145 | ||
e028cc55 | 146 | set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
1da177e4 | 147 | |
3b561130 ES |
148 | priv->sm_fullmember_sendonly_support = false; |
149 | ||
efc82eee | 150 | if (ipoib_ib_dev_open(dev)) { |
dd57c930 AE |
151 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) |
152 | return 0; | |
b8a1b1ce | 153 | goto err_disable; |
dd57c930 | 154 | } |
fe25c561 | 155 | |
5c37077f | 156 | ipoib_ib_dev_up(dev); |
1da177e4 LT |
157 | |
158 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
159 | struct ipoib_dev_priv *cpriv; | |
160 | ||
161 | /* Bring up any child interfaces too */ | |
f47944cc | 162 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
163 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
164 | int flags; | |
165 | ||
166 | flags = cpriv->dev->flags; | |
167 | if (flags & IFF_UP) | |
168 | continue; | |
169 | ||
170 | dev_change_flags(cpriv->dev, flags | IFF_UP); | |
171 | } | |
f47944cc | 172 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
173 | } |
174 | ||
175 | netif_start_queue(dev); | |
176 | ||
177 | return 0; | |
b8a1b1ce | 178 | |
b8a1b1ce | 179 | err_disable: |
b8a1b1ce RD |
180 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
181 | ||
182 | return -EINVAL; | |
1da177e4 LT |
183 | } |
184 | ||
185 | static int ipoib_stop(struct net_device *dev) | |
186 | { | |
c1048aff | 187 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
188 | |
189 | ipoib_dbg(priv, "stopping interface\n"); | |
190 | ||
191 | clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); | |
192 | ||
193 | netif_stop_queue(dev); | |
194 | ||
efc82eee | 195 | ipoib_ib_dev_down(dev); |
cd565b4b | 196 | ipoib_ib_dev_stop(dev); |
1da177e4 LT |
197 | |
198 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
199 | struct ipoib_dev_priv *cpriv; | |
200 | ||
201 | /* Bring down any child interfaces too */ | |
f47944cc | 202 | down_read(&priv->vlan_rwsem); |
1da177e4 LT |
203 | list_for_each_entry(cpriv, &priv->child_intfs, list) { |
204 | int flags; | |
205 | ||
206 | flags = cpriv->dev->flags; | |
207 | if (!(flags & IFF_UP)) | |
208 | continue; | |
209 | ||
210 | dev_change_flags(cpriv->dev, flags & ~IFF_UP); | |
211 | } | |
f47944cc | 212 | up_read(&priv->vlan_rwsem); |
1da177e4 LT |
213 | } |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
9ca36f7d | 218 | static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features) |
3d96c74d | 219 | { |
c1048aff | 220 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
3d96c74d MM |
221 | |
222 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
c4268778 | 223 | features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); |
3d96c74d MM |
224 | |
225 | return features; | |
226 | } | |
227 | ||
1da177e4 LT |
228 | static int ipoib_change_mtu(struct net_device *dev, int new_mtu) |
229 | { | |
c1048aff | 230 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
ed7b521d | 231 | int ret = 0; |
1da177e4 | 232 | |
839fcaba | 233 | /* dev->mtu > 2K ==> connected mode */ |
586a6934 PS |
234 | if (ipoib_cm_admin_enabled(dev)) { |
235 | if (new_mtu > ipoib_cm_max_mtu(dev)) | |
236 | return -EINVAL; | |
237 | ||
839fcaba MT |
238 | if (new_mtu > priv->mcast_mtu) |
239 | ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", | |
240 | priv->mcast_mtu); | |
586a6934 | 241 | |
839fcaba MT |
242 | dev->mtu = new_mtu; |
243 | return 0; | |
244 | } | |
245 | ||
bc7b3a36 | 246 | if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) |
1da177e4 LT |
247 | return -EINVAL; |
248 | ||
249 | priv->admin_mtu = new_mtu; | |
250 | ||
29da686d FD |
251 | if (priv->mcast_mtu < priv->admin_mtu) |
252 | ipoib_dbg(priv, "MTU must be smaller than the underlying " | |
253 | "link layer MTU - 4 (%u)\n", priv->mcast_mtu); | |
254 | ||
ed7b521d | 255 | new_mtu = min(priv->mcast_mtu, priv->admin_mtu); |
1da177e4 | 256 | |
ed7b521d ES |
257 | if (priv->rn_ops->ndo_change_mtu) { |
258 | bool carrier_status = netif_carrier_ok(dev); | |
259 | ||
260 | netif_carrier_off(dev); | |
261 | ||
262 | /* notify lower level on the real mtu */ | |
263 | ret = priv->rn_ops->ndo_change_mtu(dev, new_mtu); | |
264 | ||
265 | if (carrier_status) | |
266 | netif_carrier_on(dev); | |
267 | } else { | |
268 | dev->mtu = new_mtu; | |
269 | } | |
270 | ||
271 | return ret; | |
1da177e4 LT |
272 | } |
273 | ||
b6c871e5 ES |
274 | static void ipoib_get_stats(struct net_device *dev, |
275 | struct rtnl_link_stats64 *stats) | |
276 | { | |
277 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
278 | ||
279 | if (priv->rn_ops->ndo_get_stats64) | |
280 | priv->rn_ops->ndo_get_stats64(dev, stats); | |
281 | else | |
282 | netdev_stats_to_stats64(stats, &dev->stats); | |
283 | } | |
284 | ||
ddde896e GS |
285 | /* Called with an RCU read lock taken */ |
286 | static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr, | |
287 | struct net_device *dev) | |
288 | { | |
289 | struct net *net = dev_net(dev); | |
290 | struct in_device *in_dev; | |
291 | struct sockaddr_in *addr_in = (struct sockaddr_in *)addr; | |
292 | struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr; | |
293 | __be32 ret_addr; | |
294 | ||
295 | switch (addr->sa_family) { | |
296 | case AF_INET: | |
297 | in_dev = in_dev_get(dev); | |
298 | if (!in_dev) | |
299 | return false; | |
300 | ||
301 | ret_addr = inet_confirm_addr(net, in_dev, 0, | |
302 | addr_in->sin_addr.s_addr, | |
303 | RT_SCOPE_HOST); | |
304 | in_dev_put(in_dev); | |
305 | if (ret_addr) | |
306 | return true; | |
307 | ||
308 | break; | |
309 | case AF_INET6: | |
310 | if (IS_ENABLED(CONFIG_IPV6) && | |
311 | ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1)) | |
312 | return true; | |
313 | ||
314 | break; | |
315 | } | |
316 | return false; | |
317 | } | |
318 | ||
319 | /** | |
320 | * Find the master net_device on top of the given net_device. | |
321 | * @dev: base IPoIB net_device | |
322 | * | |
323 | * Returns the master net_device with a reference held, or the same net_device | |
324 | * if no master exists. | |
325 | */ | |
326 | static struct net_device *ipoib_get_master_net_dev(struct net_device *dev) | |
327 | { | |
328 | struct net_device *master; | |
329 | ||
330 | rcu_read_lock(); | |
331 | master = netdev_master_upper_dev_get_rcu(dev); | |
332 | if (master) | |
333 | dev_hold(master); | |
334 | rcu_read_unlock(); | |
335 | ||
336 | if (master) | |
337 | return master; | |
338 | ||
339 | dev_hold(dev); | |
340 | return dev; | |
341 | } | |
342 | ||
e0e79c8e DA |
343 | struct ipoib_walk_data { |
344 | const struct sockaddr *addr; | |
345 | struct net_device *result; | |
346 | }; | |
347 | ||
348 | static int ipoib_upper_walk(struct net_device *upper, void *_data) | |
349 | { | |
350 | struct ipoib_walk_data *data = _data; | |
351 | int ret = 0; | |
352 | ||
353 | if (ipoib_is_dev_match_addr_rcu(data->addr, upper)) { | |
354 | dev_hold(upper); | |
355 | data->result = upper; | |
356 | ret = 1; | |
357 | } | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
ddde896e GS |
362 | /** |
363 | * Find a net_device matching the given address, which is an upper device of | |
364 | * the given net_device. | |
365 | * @addr: IP address to look for. | |
366 | * @dev: base IPoIB net_device | |
367 | * | |
368 | * If found, returns the net_device with a reference held. Otherwise return | |
369 | * NULL. | |
370 | */ | |
371 | static struct net_device *ipoib_get_net_dev_match_addr( | |
372 | const struct sockaddr *addr, struct net_device *dev) | |
373 | { | |
e0e79c8e DA |
374 | struct ipoib_walk_data data = { |
375 | .addr = addr, | |
376 | }; | |
ddde896e GS |
377 | |
378 | rcu_read_lock(); | |
379 | if (ipoib_is_dev_match_addr_rcu(addr, dev)) { | |
380 | dev_hold(dev); | |
e0e79c8e | 381 | data.result = dev; |
ddde896e GS |
382 | goto out; |
383 | } | |
384 | ||
e0e79c8e | 385 | netdev_walk_all_upper_dev_rcu(dev, ipoib_upper_walk, &data); |
ddde896e GS |
386 | out: |
387 | rcu_read_unlock(); | |
e0e79c8e | 388 | return data.result; |
ddde896e GS |
389 | } |
390 | ||
391 | /* returns the number of IPoIB netdevs on top a given ipoib device matching a | |
392 | * pkey_index and address, if one exists. | |
393 | * | |
394 | * @found_net_dev: contains a matching net_device if the return value >= 1, | |
395 | * with a reference held. */ | |
396 | static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv, | |
397 | const union ib_gid *gid, | |
398 | u16 pkey_index, | |
399 | const struct sockaddr *addr, | |
400 | int nesting, | |
401 | struct net_device **found_net_dev) | |
402 | { | |
403 | struct ipoib_dev_priv *child_priv; | |
404 | struct net_device *net_dev = NULL; | |
405 | int matches = 0; | |
406 | ||
407 | if (priv->pkey_index == pkey_index && | |
408 | (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) { | |
409 | if (!addr) { | |
410 | net_dev = ipoib_get_master_net_dev(priv->dev); | |
411 | } else { | |
412 | /* Verify the net_device matches the IP address, as | |
413 | * IPoIB child devices currently share a GID. */ | |
414 | net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev); | |
415 | } | |
416 | if (net_dev) { | |
417 | if (!*found_net_dev) | |
418 | *found_net_dev = net_dev; | |
419 | else | |
420 | dev_put(net_dev); | |
421 | ++matches; | |
422 | } | |
423 | } | |
424 | ||
425 | /* Check child interfaces */ | |
426 | down_read_nested(&priv->vlan_rwsem, nesting); | |
427 | list_for_each_entry(child_priv, &priv->child_intfs, list) { | |
428 | matches += ipoib_match_gid_pkey_addr(child_priv, gid, | |
429 | pkey_index, addr, | |
430 | nesting + 1, | |
431 | found_net_dev); | |
432 | if (matches > 1) | |
433 | break; | |
434 | } | |
435 | up_read(&priv->vlan_rwsem); | |
436 | ||
437 | return matches; | |
438 | } | |
439 | ||
440 | /* Returns the number of matching net_devs found (between 0 and 2). Also | |
441 | * return the matching net_device in the @net_dev parameter, holding a | |
442 | * reference to the net_device, if the number of matches >= 1 */ | |
443 | static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port, | |
444 | u16 pkey_index, | |
445 | const union ib_gid *gid, | |
446 | const struct sockaddr *addr, | |
447 | struct net_device **net_dev) | |
448 | { | |
449 | struct ipoib_dev_priv *priv; | |
450 | int matches = 0; | |
451 | ||
452 | *net_dev = NULL; | |
453 | ||
454 | list_for_each_entry(priv, dev_list, list) { | |
455 | if (priv->port != port) | |
456 | continue; | |
457 | ||
458 | matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index, | |
459 | addr, 0, net_dev); | |
460 | if (matches > 1) | |
461 | break; | |
462 | } | |
463 | ||
464 | return matches; | |
465 | } | |
466 | ||
467 | static struct net_device *ipoib_get_net_dev_by_params( | |
468 | struct ib_device *dev, u8 port, u16 pkey, | |
469 | const union ib_gid *gid, const struct sockaddr *addr, | |
470 | void *client_data) | |
471 | { | |
472 | struct net_device *net_dev; | |
473 | struct list_head *dev_list = client_data; | |
474 | u16 pkey_index; | |
475 | int matches; | |
476 | int ret; | |
477 | ||
478 | if (!rdma_protocol_ib(dev, port)) | |
479 | return NULL; | |
480 | ||
481 | ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index); | |
482 | if (ret) | |
483 | return NULL; | |
484 | ||
485 | if (!dev_list) | |
486 | return NULL; | |
487 | ||
488 | /* See if we can find a unique device matching the L2 parameters */ | |
489 | matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, | |
490 | gid, NULL, &net_dev); | |
491 | ||
492 | switch (matches) { | |
493 | case 0: | |
494 | return NULL; | |
495 | case 1: | |
496 | return net_dev; | |
497 | } | |
498 | ||
499 | dev_put(net_dev); | |
500 | ||
501 | /* Couldn't find a unique device with L2 parameters only. Use L3 | |
502 | * address to uniquely match the net device */ | |
503 | matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, | |
504 | gid, addr, &net_dev); | |
505 | switch (matches) { | |
506 | case 0: | |
507 | return NULL; | |
508 | default: | |
509 | dev_warn_ratelimited(&dev->dev, | |
510 | "duplicate IP address detected\n"); | |
511 | /* Fall through */ | |
512 | case 1: | |
513 | return net_dev; | |
514 | } | |
515 | } | |
516 | ||
71d9c5f9 RD |
517 | int ipoib_set_mode(struct net_device *dev, const char *buf) |
518 | { | |
c1048aff | 519 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
71d9c5f9 | 520 | |
80b5b35a FD |
521 | if ((test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) && |
522 | !strcmp(buf, "connected\n")) || | |
523 | (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) && | |
524 | !strcmp(buf, "datagram\n"))) { | |
525 | return 0; | |
526 | } | |
527 | ||
71d9c5f9 RD |
528 | /* flush paths if we switch modes so that connections are restarted */ |
529 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { | |
530 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
531 | ipoib_warn(priv, "enabling connected mode " | |
532 | "will cause multicast packet drops\n"); | |
533 | netdev_update_features(dev); | |
edcd2a74 | 534 | dev_set_mtu(dev, ipoib_cm_max_mtu(dev)); |
71d9c5f9 | 535 | rtnl_unlock(); |
e622f2f4 | 536 | priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; |
71d9c5f9 RD |
537 | |
538 | ipoib_flush_paths(dev); | |
0a0007f2 | 539 | return (!rtnl_trylock()) ? -EBUSY : 0; |
71d9c5f9 RD |
540 | } |
541 | ||
542 | if (!strcmp(buf, "datagram\n")) { | |
543 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
544 | netdev_update_features(dev); | |
545 | dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); | |
546 | rtnl_unlock(); | |
547 | ipoib_flush_paths(dev); | |
0a0007f2 | 548 | return (!rtnl_trylock()) ? -EBUSY : 0; |
71d9c5f9 RD |
549 | } |
550 | ||
551 | return -EINVAL; | |
552 | } | |
553 | ||
546481c2 | 554 | struct ipoib_path *__path_find(struct net_device *dev, void *gid) |
1da177e4 | 555 | { |
c1048aff | 556 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
557 | struct rb_node *n = priv->path_tree.rb_node; |
558 | struct ipoib_path *path; | |
559 | int ret; | |
560 | ||
561 | while (n) { | |
562 | path = rb_entry(n, struct ipoib_path, rb_node); | |
563 | ||
37c22a77 | 564 | ret = memcmp(gid, path->pathrec.dgid.raw, |
1da177e4 LT |
565 | sizeof (union ib_gid)); |
566 | ||
567 | if (ret < 0) | |
568 | n = n->rb_left; | |
569 | else if (ret > 0) | |
570 | n = n->rb_right; | |
571 | else | |
572 | return path; | |
573 | } | |
574 | ||
575 | return NULL; | |
576 | } | |
577 | ||
578 | static int __path_add(struct net_device *dev, struct ipoib_path *path) | |
579 | { | |
c1048aff | 580 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
581 | struct rb_node **n = &priv->path_tree.rb_node; |
582 | struct rb_node *pn = NULL; | |
583 | struct ipoib_path *tpath; | |
584 | int ret; | |
585 | ||
586 | while (*n) { | |
587 | pn = *n; | |
588 | tpath = rb_entry(pn, struct ipoib_path, rb_node); | |
589 | ||
590 | ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, | |
591 | sizeof (union ib_gid)); | |
592 | if (ret < 0) | |
593 | n = &pn->rb_left; | |
594 | else if (ret > 0) | |
595 | n = &pn->rb_right; | |
596 | else | |
597 | return -EEXIST; | |
598 | } | |
599 | ||
600 | rb_link_node(&path->rb_node, pn, n); | |
601 | rb_insert_color(&path->rb_node, &priv->path_tree); | |
602 | ||
603 | list_add_tail(&path->list, &priv->path_list); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
608 | static void path_free(struct net_device *dev, struct ipoib_path *path) | |
609 | { | |
1da177e4 | 610 | struct sk_buff *skb; |
1da177e4 LT |
611 | |
612 | while ((skb = __skb_dequeue(&path->queue))) | |
613 | dev_kfree_skb_irq(skb); | |
614 | ||
c1048aff | 615 | ipoib_dbg(ipoib_priv(dev), "path_free\n"); |
1da177e4 | 616 | |
b63b70d8 SP |
617 | /* remove all neigh connected to this path */ |
618 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
1da177e4 LT |
619 | |
620 | if (path->ah) | |
621 | ipoib_put_ah(path->ah); | |
622 | ||
623 | kfree(path); | |
624 | } | |
625 | ||
1732b0ef RD |
626 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
627 | ||
628 | struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) | |
629 | { | |
630 | struct ipoib_path_iter *iter; | |
631 | ||
b1b63970 | 632 | iter = kmalloc(sizeof(*iter), GFP_KERNEL); |
1732b0ef RD |
633 | if (!iter) |
634 | return NULL; | |
635 | ||
636 | iter->dev = dev; | |
637 | memset(iter->path.pathrec.dgid.raw, 0, 16); | |
638 | ||
639 | if (ipoib_path_iter_next(iter)) { | |
640 | kfree(iter); | |
641 | return NULL; | |
642 | } | |
643 | ||
644 | return iter; | |
645 | } | |
646 | ||
647 | int ipoib_path_iter_next(struct ipoib_path_iter *iter) | |
648 | { | |
c1048aff | 649 | struct ipoib_dev_priv *priv = ipoib_priv(iter->dev); |
1732b0ef RD |
650 | struct rb_node *n; |
651 | struct ipoib_path *path; | |
652 | int ret = 1; | |
653 | ||
654 | spin_lock_irq(&priv->lock); | |
655 | ||
656 | n = rb_first(&priv->path_tree); | |
657 | ||
658 | while (n) { | |
659 | path = rb_entry(n, struct ipoib_path, rb_node); | |
660 | ||
661 | if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, | |
662 | sizeof (union ib_gid)) < 0) { | |
663 | iter->path = *path; | |
664 | ret = 0; | |
665 | break; | |
666 | } | |
667 | ||
668 | n = rb_next(n); | |
669 | } | |
670 | ||
671 | spin_unlock_irq(&priv->lock); | |
672 | ||
673 | return ret; | |
674 | } | |
675 | ||
676 | void ipoib_path_iter_read(struct ipoib_path_iter *iter, | |
677 | struct ipoib_path *path) | |
678 | { | |
679 | *path = iter->path; | |
680 | } | |
681 | ||
682 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ | |
683 | ||
ee1e2c82 MS |
684 | void ipoib_mark_paths_invalid(struct net_device *dev) |
685 | { | |
c1048aff | 686 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
ee1e2c82 MS |
687 | struct ipoib_path *path, *tp; |
688 | ||
689 | spin_lock_irq(&priv->lock); | |
690 | ||
691 | list_for_each_entry_safe(path, tp, &priv->path_list, list) { | |
57520751 DC |
692 | ipoib_dbg(priv, "mark path LID 0x%08x GID %pI6 invalid\n", |
693 | be32_to_cpu(sa_path_get_dlid(&path->pathrec)), | |
694 | path->pathrec.dgid.raw); | |
fa9391db DL |
695 | if (path->ah) |
696 | path->ah->valid = 0; | |
ee1e2c82 MS |
697 | } |
698 | ||
699 | spin_unlock_irq(&priv->lock); | |
700 | } | |
701 | ||
2b084176 ES |
702 | static void push_pseudo_header(struct sk_buff *skb, const char *daddr) |
703 | { | |
704 | struct ipoib_pseudo_header *phdr; | |
705 | ||
d58ff351 | 706 | phdr = skb_push(skb, sizeof(*phdr)); |
2b084176 ES |
707 | memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); |
708 | } | |
709 | ||
1da177e4 LT |
710 | void ipoib_flush_paths(struct net_device *dev) |
711 | { | |
c1048aff | 712 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
713 | struct ipoib_path *path, *tp; |
714 | LIST_HEAD(remove_list); | |
943c246e | 715 | unsigned long flags; |
1da177e4 | 716 | |
943c246e RD |
717 | netif_tx_lock_bh(dev); |
718 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 719 | |
157de229 | 720 | list_splice_init(&priv->path_list, &remove_list); |
1da177e4 LT |
721 | |
722 | list_for_each_entry(path, &remove_list, list) | |
723 | rb_erase(&path->rb_node, &priv->path_tree); | |
724 | ||
1da177e4 LT |
725 | list_for_each_entry_safe(path, tp, &remove_list, list) { |
726 | if (path->query) | |
727 | ib_sa_cancel_query(path->query_id, path->query); | |
943c246e RD |
728 | spin_unlock_irqrestore(&priv->lock, flags); |
729 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
730 | wait_for_completion(&path->done); |
731 | path_free(dev, path); | |
943c246e RD |
732 | netif_tx_lock_bh(dev); |
733 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 734 | } |
943c246e RD |
735 | |
736 | spin_unlock_irqrestore(&priv->lock, flags); | |
737 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
738 | } |
739 | ||
740 | static void path_rec_completion(int status, | |
c2f8fc4e | 741 | struct sa_path_rec *pathrec, |
1da177e4 LT |
742 | void *path_ptr) |
743 | { | |
744 | struct ipoib_path *path = path_ptr; | |
745 | struct net_device *dev = path->dev; | |
c1048aff | 746 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 747 | struct ipoib_ah *ah = NULL; |
c9da4bad | 748 | struct ipoib_ah *old_ah = NULL; |
d04d01b1 | 749 | struct ipoib_neigh *neigh, *tn; |
1da177e4 LT |
750 | struct sk_buff_head skqueue; |
751 | struct sk_buff *skb; | |
752 | unsigned long flags; | |
753 | ||
843613b0 | 754 | if (!status) |
5b095d98 | 755 | ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", |
57520751 | 756 | be32_to_cpu(sa_path_get_dlid(pathrec)), |
9fdca4da | 757 | pathrec->dgid.raw); |
1da177e4 | 758 | else |
5b095d98 | 759 | ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", |
fcace2fe | 760 | status, path->pathrec.dgid.raw); |
1da177e4 LT |
761 | |
762 | skb_queue_head_init(&skqueue); | |
763 | ||
764 | if (!status) { | |
90898850 | 765 | struct rdma_ah_attr av; |
46f1b3d7 | 766 | |
4ad6a024 | 767 | if (!ib_init_ah_attr_from_path(priv->ca, priv->port, |
39839107 | 768 | pathrec, &av, NULL)) { |
46f1b3d7 | 769 | ah = ipoib_create_ah(dev, priv->pd, &av); |
aa74f487 PP |
770 | rdma_destroy_ah_attr(&av); |
771 | } | |
1da177e4 LT |
772 | } |
773 | ||
774 | spin_lock_irqsave(&priv->lock, flags); | |
775 | ||
3874397c | 776 | if (!IS_ERR_OR_NULL(ah)) { |
43900089 ES |
777 | /* |
778 | * pathrec.dgid is used as the database key from the LLADDR, | |
779 | * it must remain unchanged even if the SA returns a different | |
780 | * GID to use in the AH. | |
781 | */ | |
782 | if (memcmp(pathrec->dgid.raw, path->pathrec.dgid.raw, | |
783 | sizeof(union ib_gid))) { | |
784 | ipoib_dbg( | |
785 | priv, | |
786 | "%s got PathRec for gid %pI6 while asked for %pI6\n", | |
787 | dev->name, pathrec->dgid.raw, | |
788 | path->pathrec.dgid.raw); | |
789 | memcpy(pathrec->dgid.raw, path->pathrec.dgid.raw, | |
790 | sizeof(union ib_gid)); | |
791 | } | |
792 | ||
1da177e4 LT |
793 | path->pathrec = *pathrec; |
794 | ||
c9da4bad RD |
795 | old_ah = path->ah; |
796 | path->ah = ah; | |
797 | ||
1da177e4 | 798 | ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", |
57520751 | 799 | ah, be32_to_cpu(sa_path_get_dlid(pathrec)), |
9fdca4da | 800 | pathrec->sl); |
1da177e4 LT |
801 | |
802 | while ((skb = __skb_dequeue(&path->queue))) | |
803 | __skb_queue_tail(&skqueue, skb); | |
804 | ||
d04d01b1 | 805 | list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { |
ee1e2c82 MS |
806 | if (neigh->ah) { |
807 | WARN_ON(neigh->ah != old_ah); | |
808 | /* | |
809 | * Dropping the ah reference inside | |
810 | * priv->lock is safe here, because we | |
811 | * will hold one more reference from | |
812 | * the original value of path->ah (ie | |
813 | * old_ah). | |
814 | */ | |
815 | ipoib_put_ah(neigh->ah); | |
816 | } | |
1da177e4 LT |
817 | kref_get(&path->ah->ref); |
818 | neigh->ah = path->ah; | |
819 | ||
b63b70d8 | 820 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
821 | if (!ipoib_cm_get(neigh)) |
822 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, | |
823 | path, | |
824 | neigh)); | |
825 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 826 | ipoib_neigh_free(neigh); |
839fcaba MT |
827 | continue; |
828 | } | |
829 | } | |
830 | ||
1da177e4 LT |
831 | while ((skb = __skb_dequeue(&neigh->queue))) |
832 | __skb_queue_tail(&skqueue, skb); | |
833 | } | |
fa9391db | 834 | path->ah->valid = 1; |
5872a9fc | 835 | } |
1da177e4 | 836 | |
5872a9fc | 837 | path->query = NULL; |
1da177e4 LT |
838 | complete(&path->done); |
839 | ||
840 | spin_unlock_irqrestore(&priv->lock, flags); | |
841 | ||
f72dd566 RD |
842 | if (IS_ERR_OR_NULL(ah)) |
843 | ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); | |
844 | ||
ee1e2c82 MS |
845 | if (old_ah) |
846 | ipoib_put_ah(old_ah); | |
847 | ||
1da177e4 | 848 | while ((skb = __skb_dequeue(&skqueue))) { |
d32b9a81 | 849 | int ret; |
1da177e4 | 850 | skb->dev = dev; |
d32b9a81 FD |
851 | ret = dev_queue_xmit(skb); |
852 | if (ret) | |
853 | ipoib_warn(priv, "%s: dev_queue_xmit failed to re-queue packet, ret:%d\n", | |
854 | __func__, ret); | |
1da177e4 LT |
855 | } |
856 | } | |
857 | ||
98aebc55 ES |
858 | static void init_path_rec(struct ipoib_dev_priv *priv, struct ipoib_path *path, |
859 | void *gid) | |
860 | { | |
861 | path->dev = priv->dev; | |
862 | ||
863 | if (rdma_cap_opa_ah(priv->ca, priv->port)) | |
864 | path->pathrec.rec_type = SA_PATH_REC_TYPE_OPA; | |
865 | else | |
866 | path->pathrec.rec_type = SA_PATH_REC_TYPE_IB; | |
867 | ||
868 | memcpy(path->pathrec.dgid.raw, gid, sizeof(union ib_gid)); | |
869 | path->pathrec.sgid = priv->local_gid; | |
870 | path->pathrec.pkey = cpu_to_be16(priv->pkey); | |
871 | path->pathrec.numb_path = 1; | |
872 | path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
873 | } | |
874 | ||
37c22a77 | 875 | static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) |
1da177e4 | 876 | { |
c1048aff | 877 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
878 | struct ipoib_path *path; |
879 | ||
1401b53a JM |
880 | if (!priv->broadcast) |
881 | return NULL; | |
882 | ||
b1b63970 | 883 | path = kzalloc(sizeof(*path), GFP_ATOMIC); |
1da177e4 LT |
884 | if (!path) |
885 | return NULL; | |
886 | ||
1da177e4 LT |
887 | skb_queue_head_init(&path->queue); |
888 | ||
889 | INIT_LIST_HEAD(&path->neigh_list); | |
1da177e4 | 890 | |
98aebc55 | 891 | init_path_rec(priv, path, gid); |
1da177e4 LT |
892 | |
893 | return path; | |
894 | } | |
895 | ||
896 | static int path_rec_start(struct net_device *dev, | |
897 | struct ipoib_path *path) | |
898 | { | |
c1048aff | 899 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 900 | |
5b095d98 | 901 | ipoib_dbg(priv, "Start path record lookup for %pI6\n", |
fcace2fe | 902 | path->pathrec.dgid.raw); |
1da177e4 | 903 | |
65c7edda RD |
904 | init_completion(&path->done); |
905 | ||
1da177e4 | 906 | path->query_id = |
c1a0b23b | 907 | ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, |
1da177e4 LT |
908 | &path->pathrec, |
909 | IB_SA_PATH_REC_DGID | | |
910 | IB_SA_PATH_REC_SGID | | |
911 | IB_SA_PATH_REC_NUMB_PATH | | |
81668838 | 912 | IB_SA_PATH_REC_TRAFFIC_CLASS | |
1da177e4 LT |
913 | IB_SA_PATH_REC_PKEY, |
914 | 1000, GFP_ATOMIC, | |
915 | path_rec_completion, | |
916 | path, &path->query); | |
917 | if (path->query_id < 0) { | |
01b3fc8b | 918 | ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); |
1da177e4 | 919 | path->query = NULL; |
93a3ab93 | 920 | complete(&path->done); |
1da177e4 LT |
921 | return path->query_id; |
922 | } | |
923 | ||
924 | return 0; | |
925 | } | |
926 | ||
fa9391db DL |
927 | static void neigh_refresh_path(struct ipoib_neigh *neigh, u8 *daddr, |
928 | struct net_device *dev) | |
929 | { | |
930 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
931 | struct ipoib_path *path; | |
932 | unsigned long flags; | |
933 | ||
934 | spin_lock_irqsave(&priv->lock, flags); | |
935 | ||
936 | path = __path_find(dev, daddr + 4); | |
937 | if (!path) | |
938 | goto out; | |
939 | if (!path->query) | |
940 | path_rec_start(dev, path); | |
941 | out: | |
942 | spin_unlock_irqrestore(&priv->lock, flags); | |
943 | } | |
944 | ||
16ba3def ES |
945 | static struct ipoib_neigh *neigh_add_path(struct sk_buff *skb, u8 *daddr, |
946 | struct net_device *dev) | |
1da177e4 | 947 | { |
c1048aff | 948 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
cd565b4b | 949 | struct rdma_netdev *rn = netdev_priv(dev); |
1da177e4 LT |
950 | struct ipoib_path *path; |
951 | struct ipoib_neigh *neigh; | |
943c246e | 952 | unsigned long flags; |
1da177e4 | 953 | |
b5120a6e | 954 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 | 955 | neigh = ipoib_neigh_alloc(daddr, dev); |
1da177e4 | 956 | if (!neigh) { |
b5120a6e | 957 | spin_unlock_irqrestore(&priv->lock, flags); |
de903512 | 958 | ++dev->stats.tx_dropped; |
1da177e4 | 959 | dev_kfree_skb_any(skb); |
16ba3def ES |
960 | return NULL; |
961 | } | |
962 | ||
963 | /* To avoid race condition, make sure that the | |
964 | * neigh will be added only once. | |
965 | */ | |
966 | if (unlikely(!list_empty(&neigh->list))) { | |
967 | spin_unlock_irqrestore(&priv->lock, flags); | |
968 | return neigh; | |
1da177e4 LT |
969 | } |
970 | ||
b63b70d8 | 971 | path = __path_find(dev, daddr + 4); |
1da177e4 | 972 | if (!path) { |
b63b70d8 | 973 | path = path_rec_create(dev, daddr + 4); |
1da177e4 | 974 | if (!path) |
d2e0655e | 975 | goto err_path; |
1da177e4 LT |
976 | |
977 | __path_add(dev, path); | |
978 | } | |
979 | ||
980 | list_add_tail(&neigh->list, &path->neigh_list); | |
981 | ||
fa9391db | 982 | if (path->ah && path->ah->valid) { |
1da177e4 LT |
983 | kref_get(&path->ah->ref); |
984 | neigh->ah = path->ah; | |
985 | ||
b63b70d8 | 986 | if (ipoib_cm_enabled(dev, neigh->daddr)) { |
839fcaba MT |
987 | if (!ipoib_cm_get(neigh)) |
988 | ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); | |
989 | if (!ipoib_cm_get(neigh)) { | |
b63b70d8 | 990 | ipoib_neigh_free(neigh); |
839fcaba MT |
991 | goto err_drop; |
992 | } | |
fc791b63 PA |
993 | if (skb_queue_len(&neigh->queue) < |
994 | IPOIB_MAX_PATH_REC_QUEUE) { | |
2b084176 | 995 | push_pseudo_header(skb, neigh->daddr); |
839fcaba | 996 | __skb_queue_tail(&neigh->queue, skb); |
fc791b63 | 997 | } else { |
839fcaba MT |
998 | ipoib_warn(priv, "queue length limit %d. Packet drop.\n", |
999 | skb_queue_len(&neigh->queue)); | |
1000 | goto err_drop; | |
1001 | } | |
721d67cd RD |
1002 | } else { |
1003 | spin_unlock_irqrestore(&priv->lock, flags); | |
cd565b4b ES |
1004 | path->ah->last_send = rn->send(dev, skb, path->ah->ah, |
1005 | IPOIB_QPN(daddr)); | |
b63b70d8 | 1006 | ipoib_neigh_put(neigh); |
16ba3def | 1007 | return NULL; |
721d67cd | 1008 | } |
1da177e4 LT |
1009 | } else { |
1010 | neigh->ah = NULL; | |
1da177e4 LT |
1011 | |
1012 | if (!path->query && path_rec_start(dev, path)) | |
49b8e744 | 1013 | goto err_path; |
2b084176 ES |
1014 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
1015 | push_pseudo_header(skb, neigh->daddr); | |
1e85b806 | 1016 | __skb_queue_tail(&neigh->queue, skb); |
2b084176 | 1017 | } else { |
1e85b806 | 1018 | goto err_drop; |
2b084176 | 1019 | } |
1da177e4 LT |
1020 | } |
1021 | ||
943c246e | 1022 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 1023 | ipoib_neigh_put(neigh); |
16ba3def | 1024 | return NULL; |
1da177e4 | 1025 | |
d2e0655e | 1026 | err_path: |
b63b70d8 | 1027 | ipoib_neigh_free(neigh); |
839fcaba | 1028 | err_drop: |
de903512 | 1029 | ++dev->stats.tx_dropped; |
1da177e4 LT |
1030 | dev_kfree_skb_any(skb); |
1031 | ||
943c246e | 1032 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 | 1033 | ipoib_neigh_put(neigh); |
16ba3def ES |
1034 | |
1035 | return NULL; | |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, | |
fc791b63 | 1039 | struct ipoib_pseudo_header *phdr) |
1da177e4 | 1040 | { |
c1048aff | 1041 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
cd565b4b | 1042 | struct rdma_netdev *rn = netdev_priv(dev); |
1da177e4 | 1043 | struct ipoib_path *path; |
943c246e | 1044 | unsigned long flags; |
1da177e4 | 1045 | |
943c246e | 1046 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 1047 | |
98aebc55 ES |
1048 | /* no broadcast means that all paths are (going to be) not valid */ |
1049 | if (!priv->broadcast) | |
1050 | goto drop_and_unlock; | |
1051 | ||
fc791b63 | 1052 | path = __path_find(dev, phdr->hwaddr + 4); |
fa9391db | 1053 | if (!path || !path->ah || !path->ah->valid) { |
71d98b46 | 1054 | if (!path) { |
fc791b63 | 1055 | path = path_rec_create(dev, phdr->hwaddr + 4); |
15517080 ES |
1056 | if (!path) |
1057 | goto drop_and_unlock; | |
1058 | __path_add(dev, path); | |
1059 | } else { | |
1060 | /* | |
1061 | * make sure there are no changes in the existing | |
1062 | * path record | |
1063 | */ | |
1064 | init_path_rec(priv, path, phdr->hwaddr + 4); | |
1065 | } | |
1066 | if (!path->query && path_rec_start(dev, path)) { | |
1067 | goto drop_and_unlock; | |
71d98b46 | 1068 | } |
1da177e4 | 1069 | |
15517080 ES |
1070 | if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
1071 | push_pseudo_header(skb, phdr->hwaddr); | |
1072 | __skb_queue_tail(&path->queue, skb); | |
1073 | goto unlock; | |
1da177e4 | 1074 | } else { |
98aebc55 | 1075 | goto drop_and_unlock; |
1da177e4 | 1076 | } |
1da177e4 LT |
1077 | } |
1078 | ||
943c246e | 1079 | spin_unlock_irqrestore(&priv->lock, flags); |
15517080 ES |
1080 | ipoib_dbg(priv, "Send unicast ARP to %08x\n", |
1081 | be32_to_cpu(sa_path_get_dlid(&path->pathrec))); | |
1082 | path->ah->last_send = rn->send(dev, skb, path->ah->ah, | |
1083 | IPOIB_QPN(phdr->hwaddr)); | |
98aebc55 ES |
1084 | return; |
1085 | ||
1086 | drop_and_unlock: | |
1087 | ++dev->stats.tx_dropped; | |
1088 | dev_kfree_skb_any(skb); | |
15517080 | 1089 | unlock: |
98aebc55 | 1090 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1091 | } |
1092 | ||
47a3968a | 1093 | static netdev_tx_t ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 1094 | { |
c1048aff | 1095 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
cd565b4b | 1096 | struct rdma_netdev *rn = netdev_priv(dev); |
1da177e4 | 1097 | struct ipoib_neigh *neigh; |
fc791b63 | 1098 | struct ipoib_pseudo_header *phdr; |
b63b70d8 | 1099 | struct ipoib_header *header; |
1da177e4 LT |
1100 | unsigned long flags; |
1101 | ||
fc791b63 PA |
1102 | phdr = (struct ipoib_pseudo_header *) skb->data; |
1103 | skb_pull(skb, sizeof(*phdr)); | |
b63b70d8 SP |
1104 | header = (struct ipoib_header *) skb->data; |
1105 | ||
fc791b63 | 1106 | if (unlikely(phdr->hwaddr[4] == 0xff)) { |
b63b70d8 SP |
1107 | /* multicast, arrange "if" according to probability */ |
1108 | if ((header->proto != htons(ETH_P_IP)) && | |
1109 | (header->proto != htons(ETH_P_IPV6)) && | |
1110 | (header->proto != htons(ETH_P_ARP)) && | |
dc850b0e PM |
1111 | (header->proto != htons(ETH_P_RARP)) && |
1112 | (header->proto != htons(ETH_P_TIPC))) { | |
b63b70d8 | 1113 | /* ethertype not supported by IPoIB */ |
17e6abee DM |
1114 | ++dev->stats.tx_dropped; |
1115 | dev_kfree_skb_any(skb); | |
b63b70d8 | 1116 | return NETDEV_TX_OK; |
17e6abee | 1117 | } |
b63b70d8 | 1118 | /* Add in the P_Key for multicast*/ |
fc791b63 PA |
1119 | phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; |
1120 | phdr->hwaddr[9] = priv->pkey & 0xff; | |
b63b70d8 | 1121 | |
fc791b63 | 1122 | neigh = ipoib_neigh_get(dev, phdr->hwaddr); |
b63b70d8 SP |
1123 | if (likely(neigh)) |
1124 | goto send_using_neigh; | |
fc791b63 | 1125 | ipoib_mcast_send(dev, phdr->hwaddr, skb); |
b63b70d8 | 1126 | return NETDEV_TX_OK; |
17e6abee | 1127 | } |
1da177e4 | 1128 | |
b63b70d8 SP |
1129 | /* unicast, arrange "switch" according to probability */ |
1130 | switch (header->proto) { | |
1131 | case htons(ETH_P_IP): | |
1132 | case htons(ETH_P_IPV6): | |
dc850b0e | 1133 | case htons(ETH_P_TIPC): |
fc791b63 | 1134 | neigh = ipoib_neigh_get(dev, phdr->hwaddr); |
b63b70d8 | 1135 | if (unlikely(!neigh)) { |
16ba3def ES |
1136 | neigh = neigh_add_path(skb, phdr->hwaddr, dev); |
1137 | if (likely(!neigh)) | |
1138 | return NETDEV_TX_OK; | |
a50df398 | 1139 | } |
b63b70d8 SP |
1140 | break; |
1141 | case htons(ETH_P_ARP): | |
1142 | case htons(ETH_P_RARP): | |
1143 | /* for unicast ARP and RARP should always perform path find */ | |
fc791b63 | 1144 | unicast_arp_send(skb, dev, phdr); |
b63b70d8 SP |
1145 | return NETDEV_TX_OK; |
1146 | default: | |
1147 | /* ethertype not supported by IPoIB */ | |
1148 | ++dev->stats.tx_dropped; | |
1149 | dev_kfree_skb_any(skb); | |
1150 | return NETDEV_TX_OK; | |
1151 | } | |
8a7f7521 | 1152 | |
b63b70d8 SP |
1153 | send_using_neigh: |
1154 | /* note we now hold a ref to neigh */ | |
1155 | if (ipoib_cm_get(neigh)) { | |
1156 | if (ipoib_cm_up(neigh)) { | |
1157 | ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); | |
1158 | goto unref; | |
1da177e4 | 1159 | } |
fa9391db | 1160 | } else if (neigh->ah && neigh->ah->valid) { |
cd565b4b ES |
1161 | neigh->ah->last_send = rn->send(dev, skb, neigh->ah->ah, |
1162 | IPOIB_QPN(phdr->hwaddr)); | |
b63b70d8 | 1163 | goto unref; |
fa9391db DL |
1164 | } else if (neigh->ah) { |
1165 | neigh_refresh_path(neigh, phdr->hwaddr, dev); | |
b63b70d8 | 1166 | } |
1da177e4 | 1167 | |
b63b70d8 | 1168 | if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
2b084176 | 1169 | push_pseudo_header(skb, phdr->hwaddr); |
b63b70d8 SP |
1170 | spin_lock_irqsave(&priv->lock, flags); |
1171 | __skb_queue_tail(&neigh->queue, skb); | |
1172 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 1173 | } else { |
b63b70d8 SP |
1174 | ++dev->stats.tx_dropped; |
1175 | dev_kfree_skb_any(skb); | |
1176 | } | |
1da177e4 | 1177 | |
b63b70d8 SP |
1178 | unref: |
1179 | ipoib_neigh_put(neigh); | |
1da177e4 | 1180 | |
1da177e4 LT |
1181 | return NETDEV_TX_OK; |
1182 | } | |
1183 | ||
1da177e4 LT |
1184 | static void ipoib_timeout(struct net_device *dev) |
1185 | { | |
c1048aff | 1186 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 1187 | |
4b2d319b | 1188 | ipoib_warn(priv, "transmit timeout: latency %d msecs\n", |
4d0e9657 | 1189 | jiffies_to_msecs(jiffies - dev_trans_start(dev))); |
4b2d319b RD |
1190 | ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", |
1191 | netif_queue_stopped(dev), | |
1192 | priv->tx_head, priv->tx_tail); | |
1da177e4 LT |
1193 | /* XXX reset QP, etc. */ |
1194 | } | |
1195 | ||
1196 | static int ipoib_hard_header(struct sk_buff *skb, | |
1197 | struct net_device *dev, | |
1198 | unsigned short type, | |
0578cdad KH |
1199 | const void *daddr, |
1200 | const void *saddr, | |
1201 | unsigned int len) | |
1da177e4 LT |
1202 | { |
1203 | struct ipoib_header *header; | |
1204 | ||
b1b63970 | 1205 | header = skb_push(skb, sizeof(*header)); |
1da177e4 LT |
1206 | |
1207 | header->proto = htons(type); | |
1208 | header->reserved = 0; | |
1209 | ||
1210 | /* | |
b63b70d8 | 1211 | * we don't rely on dst_entry structure, always stuff the |
fc791b63 | 1212 | * destination address into skb hard header so we can figure out where |
936d7de3 | 1213 | * to send the packet later. |
1da177e4 | 1214 | */ |
2b084176 | 1215 | push_pseudo_header(skb, daddr); |
1da177e4 | 1216 | |
fc791b63 | 1217 | return IPOIB_HARD_LEN; |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | static void ipoib_set_mcast_list(struct net_device *dev) | |
1221 | { | |
c1048aff | 1222 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 1223 | |
7a343d4c LA |
1224 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { |
1225 | ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); | |
1226 | return; | |
1227 | } | |
1228 | ||
0b39578b | 1229 | queue_work(priv->wq, &priv->restart_task); |
1da177e4 LT |
1230 | } |
1231 | ||
5aa7add8 ND |
1232 | static int ipoib_get_iflink(const struct net_device *dev) |
1233 | { | |
c1048aff | 1234 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
5aa7add8 | 1235 | |
2c153959 ES |
1236 | /* parent interface */ |
1237 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
1238 | return dev->ifindex; | |
1239 | ||
1240 | /* child/vlan interface */ | |
5aa7add8 ND |
1241 | return priv->parent->ifindex; |
1242 | } | |
1243 | ||
b63b70d8 | 1244 | static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) |
1da177e4 | 1245 | { |
b63b70d8 SP |
1246 | /* |
1247 | * Use only the address parts that contributes to spreading | |
1248 | * The subnet prefix is not used as one can not connect to | |
1249 | * same remote port (GUID) using the same remote QPN via two | |
1250 | * different subnets. | |
1251 | */ | |
1252 | /* qpn octets[1:4) & port GUID octets[12:20) */ | |
9d1ad66e | 1253 | u32 *d32 = (u32 *) daddr; |
b63b70d8 SP |
1254 | u32 hv; |
1255 | ||
9d1ad66e | 1256 | hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0); |
b63b70d8 SP |
1257 | return hv & htbl->mask; |
1258 | } | |
1259 | ||
1260 | struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr) | |
1261 | { | |
c1048aff | 1262 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
b63b70d8 SP |
1263 | struct ipoib_neigh_table *ntbl = &priv->ntbl; |
1264 | struct ipoib_neigh_hash *htbl; | |
1265 | struct ipoib_neigh *neigh = NULL; | |
1266 | u32 hash_val; | |
1267 | ||
1268 | rcu_read_lock_bh(); | |
1269 | ||
1270 | htbl = rcu_dereference_bh(ntbl->htbl); | |
1271 | ||
1272 | if (!htbl) | |
1273 | goto out_unlock; | |
1274 | ||
1275 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1276 | for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]); | |
1277 | neigh != NULL; | |
1278 | neigh = rcu_dereference_bh(neigh->hnext)) { | |
1279 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { | |
1280 | /* found, take one ref on behalf of the caller */ | |
1281 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1282 | /* deleted */ | |
1283 | neigh = NULL; | |
1284 | goto out_unlock; | |
1285 | } | |
61c78eea ES |
1286 | |
1287 | if (likely(skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)) | |
1288 | neigh->alive = jiffies; | |
b63b70d8 SP |
1289 | goto out_unlock; |
1290 | } | |
1291 | } | |
1292 | ||
1293 | out_unlock: | |
1294 | rcu_read_unlock_bh(); | |
1295 | return neigh; | |
1296 | } | |
1297 | ||
1298 | static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv) | |
1299 | { | |
1300 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1301 | struct ipoib_neigh_hash *htbl; | |
1302 | unsigned long neigh_obsolete; | |
1303 | unsigned long dt; | |
1da177e4 | 1304 | unsigned long flags; |
b63b70d8 | 1305 | int i; |
bd99b2e0 | 1306 | LIST_HEAD(remove_list); |
1da177e4 | 1307 | |
b5120a6e | 1308 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1309 | |
1310 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1311 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1312 | |
1313 | if (!htbl) | |
1314 | goto out_unlock; | |
1315 | ||
1316 | /* neigh is obsolete if it was idle for two GC periods */ | |
1317 | dt = 2 * arp_tbl.gc_interval; | |
1318 | neigh_obsolete = jiffies - dt; | |
b63b70d8 SP |
1319 | |
1320 | for (i = 0; i < htbl->size; i++) { | |
1321 | struct ipoib_neigh *neigh; | |
1322 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1323 | ||
1324 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1325 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1326 | /* was the neigh idle for two GC periods */ |
1327 | if (time_after(neigh_obsolete, neigh->alive)) { | |
bd99b2e0 | 1328 | |
432c55ff | 1329 | ipoib_check_and_add_mcast_sendonly(priv, neigh->daddr + 4, &remove_list); |
bd99b2e0 | 1330 | |
b63b70d8 SP |
1331 | rcu_assign_pointer(*np, |
1332 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1333 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1334 | /* remove from path/mc list */ |
c586071d | 1335 | list_del_init(&neigh->list); |
b63b70d8 SP |
1336 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1337 | } else { | |
1338 | np = &neigh->hnext; | |
1339 | } | |
1da177e4 | 1340 | |
b63b70d8 SP |
1341 | } |
1342 | } | |
1da177e4 | 1343 | |
b63b70d8 | 1344 | out_unlock: |
b5120a6e | 1345 | spin_unlock_irqrestore(&priv->lock, flags); |
50be28de | 1346 | ipoib_mcast_remove_list(&remove_list); |
b63b70d8 | 1347 | } |
1da177e4 | 1348 | |
b63b70d8 SP |
1349 | static void ipoib_reap_neigh(struct work_struct *work) |
1350 | { | |
1351 | struct ipoib_dev_priv *priv = | |
1352 | container_of(work, struct ipoib_dev_priv, neigh_reap_task.work); | |
1353 | ||
1354 | __ipoib_reap_neigh(priv); | |
1355 | ||
cda8daf1 ES |
1356 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
1357 | arp_tbl.gc_interval); | |
1da177e4 LT |
1358 | } |
1359 | ||
b63b70d8 SP |
1360 | |
1361 | static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr, | |
732a2170 | 1362 | struct net_device *dev) |
d2e0655e MT |
1363 | { |
1364 | struct ipoib_neigh *neigh; | |
1365 | ||
b1b63970 | 1366 | neigh = kzalloc(sizeof(*neigh), GFP_ATOMIC); |
d2e0655e MT |
1367 | if (!neigh) |
1368 | return NULL; | |
1369 | ||
732a2170 | 1370 | neigh->dev = dev; |
b63b70d8 | 1371 | memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr)); |
82b39913 | 1372 | skb_queue_head_init(&neigh->queue); |
b63b70d8 | 1373 | INIT_LIST_HEAD(&neigh->list); |
839fcaba | 1374 | ipoib_cm_set(neigh, NULL); |
b63b70d8 SP |
1375 | /* one ref on behalf of the caller */ |
1376 | atomic_set(&neigh->refcnt, 1); | |
1377 | ||
1378 | return neigh; | |
1379 | } | |
1380 | ||
1381 | struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr, | |
1382 | struct net_device *dev) | |
1383 | { | |
c1048aff | 1384 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
b63b70d8 SP |
1385 | struct ipoib_neigh_table *ntbl = &priv->ntbl; |
1386 | struct ipoib_neigh_hash *htbl; | |
1387 | struct ipoib_neigh *neigh; | |
1388 | u32 hash_val; | |
1389 | ||
b63b70d8 | 1390 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1391 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1392 | if (!htbl) { |
1393 | neigh = NULL; | |
1394 | goto out_unlock; | |
1395 | } | |
1396 | ||
1397 | /* need to add a new neigh, but maybe some other thread succeeded? | |
1398 | * recalc hash, maybe hash resize took place so we do a search | |
1399 | */ | |
1400 | hash_val = ipoib_addr_hash(htbl, daddr); | |
1401 | for (neigh = rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1402 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1403 | neigh != NULL; |
1404 | neigh = rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1405 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1406 | if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { |
1407 | /* found, take one ref on behalf of the caller */ | |
1408 | if (!atomic_inc_not_zero(&neigh->refcnt)) { | |
1409 | /* deleted */ | |
1410 | neigh = NULL; | |
1411 | break; | |
1412 | } | |
1413 | neigh->alive = jiffies; | |
1414 | goto out_unlock; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | neigh = ipoib_neigh_ctor(daddr, dev); | |
1419 | if (!neigh) | |
1420 | goto out_unlock; | |
1421 | ||
1422 | /* one ref on behalf of the hash table */ | |
1423 | atomic_inc(&neigh->refcnt); | |
1424 | neigh->alive = jiffies; | |
1425 | /* put in hash */ | |
1426 | rcu_assign_pointer(neigh->hnext, | |
1427 | rcu_dereference_protected(htbl->buckets[hash_val], | |
b5120a6e | 1428 | lockdep_is_held(&priv->lock))); |
b63b70d8 SP |
1429 | rcu_assign_pointer(htbl->buckets[hash_val], neigh); |
1430 | atomic_inc(&ntbl->entries); | |
1431 | ||
1432 | out_unlock: | |
d2e0655e MT |
1433 | |
1434 | return neigh; | |
1435 | } | |
1436 | ||
b63b70d8 | 1437 | void ipoib_neigh_dtor(struct ipoib_neigh *neigh) |
d2e0655e | 1438 | { |
b63b70d8 SP |
1439 | /* neigh reference count was dropprd to zero */ |
1440 | struct net_device *dev = neigh->dev; | |
c1048aff | 1441 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
2745b5b7 | 1442 | struct sk_buff *skb; |
b63b70d8 SP |
1443 | if (neigh->ah) |
1444 | ipoib_put_ah(neigh->ah); | |
2745b5b7 | 1445 | while ((skb = __skb_dequeue(&neigh->queue))) { |
de903512 | 1446 | ++dev->stats.tx_dropped; |
2745b5b7 MT |
1447 | dev_kfree_skb_any(skb); |
1448 | } | |
839fcaba MT |
1449 | if (ipoib_cm_get(neigh)) |
1450 | ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); | |
c1048aff | 1451 | ipoib_dbg(ipoib_priv(dev), |
b63b70d8 SP |
1452 | "neigh free for %06x %pI6\n", |
1453 | IPOIB_QPN(neigh->daddr), | |
1454 | neigh->daddr + 4); | |
d2e0655e | 1455 | kfree(neigh); |
b63b70d8 SP |
1456 | if (atomic_dec_and_test(&priv->ntbl.entries)) { |
1457 | if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags)) | |
1458 | complete(&priv->ntbl.flushed); | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | static void ipoib_neigh_reclaim(struct rcu_head *rp) | |
1463 | { | |
1464 | /* Called as a result of removal from hash table */ | |
1465 | struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu); | |
1466 | /* note TX context may hold another ref */ | |
1467 | ipoib_neigh_put(neigh); | |
d2e0655e MT |
1468 | } |
1469 | ||
b63b70d8 | 1470 | void ipoib_neigh_free(struct ipoib_neigh *neigh) |
1da177e4 | 1471 | { |
b63b70d8 | 1472 | struct net_device *dev = neigh->dev; |
c1048aff | 1473 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
b63b70d8 SP |
1474 | struct ipoib_neigh_table *ntbl = &priv->ntbl; |
1475 | struct ipoib_neigh_hash *htbl; | |
1476 | struct ipoib_neigh __rcu **np; | |
1477 | struct ipoib_neigh *n; | |
1478 | u32 hash_val; | |
1479 | ||
b63b70d8 | 1480 | htbl = rcu_dereference_protected(ntbl->htbl, |
b5120a6e | 1481 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1482 | if (!htbl) |
b5120a6e | 1483 | return; |
b63b70d8 SP |
1484 | |
1485 | hash_val = ipoib_addr_hash(htbl, neigh->daddr); | |
1486 | np = &htbl->buckets[hash_val]; | |
1487 | for (n = rcu_dereference_protected(*np, | |
b5120a6e | 1488 | lockdep_is_held(&priv->lock)); |
b63b70d8 | 1489 | n != NULL; |
6c723a68 | 1490 | n = rcu_dereference_protected(*np, |
b5120a6e | 1491 | lockdep_is_held(&priv->lock))) { |
b63b70d8 SP |
1492 | if (n == neigh) { |
1493 | /* found */ | |
1494 | rcu_assign_pointer(*np, | |
1495 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1496 | lockdep_is_held(&priv->lock))); |
49b8e744 | 1497 | /* remove from parent list */ |
c586071d | 1498 | list_del_init(&neigh->list); |
b63b70d8 | 1499 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
b5120a6e | 1500 | return; |
b63b70d8 SP |
1501 | } else { |
1502 | np = &n->hnext; | |
1503 | } | |
1504 | } | |
b63b70d8 SP |
1505 | } |
1506 | ||
1507 | static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) | |
1508 | { | |
1509 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1510 | struct ipoib_neigh_hash *htbl; | |
52374967 | 1511 | struct ipoib_neigh __rcu **buckets; |
b63b70d8 SP |
1512 | u32 size; |
1513 | ||
1514 | clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); | |
1515 | ntbl->htbl = NULL; | |
b63b70d8 SP |
1516 | htbl = kzalloc(sizeof(*htbl), GFP_KERNEL); |
1517 | if (!htbl) | |
1518 | return -ENOMEM; | |
b63b70d8 | 1519 | size = roundup_pow_of_two(arp_tbl.gc_thresh3); |
259e1914 | 1520 | buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL); |
b63b70d8 SP |
1521 | if (!buckets) { |
1522 | kfree(htbl); | |
1523 | return -ENOMEM; | |
1524 | } | |
1525 | htbl->size = size; | |
1526 | htbl->mask = (size - 1); | |
1527 | htbl->buckets = buckets; | |
52374967 | 1528 | RCU_INIT_POINTER(ntbl->htbl, htbl); |
66172c09 | 1529 | htbl->ntbl = ntbl; |
b63b70d8 SP |
1530 | atomic_set(&ntbl->entries, 0); |
1531 | ||
1532 | /* start garbage collection */ | |
0b39578b | 1533 | queue_delayed_work(priv->wq, &priv->neigh_reap_task, |
b63b70d8 | 1534 | arp_tbl.gc_interval); |
1da177e4 LT |
1535 | |
1536 | return 0; | |
1537 | } | |
1538 | ||
b63b70d8 SP |
1539 | static void neigh_hash_free_rcu(struct rcu_head *head) |
1540 | { | |
1541 | struct ipoib_neigh_hash *htbl = container_of(head, | |
1542 | struct ipoib_neigh_hash, | |
1543 | rcu); | |
1544 | struct ipoib_neigh __rcu **buckets = htbl->buckets; | |
66172c09 | 1545 | struct ipoib_neigh_table *ntbl = htbl->ntbl; |
b63b70d8 | 1546 | |
259e1914 | 1547 | kvfree(buckets); |
b63b70d8 | 1548 | kfree(htbl); |
66172c09 | 1549 | complete(&ntbl->deleted); |
b63b70d8 SP |
1550 | } |
1551 | ||
1552 | void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid) | |
1553 | { | |
c1048aff | 1554 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
b63b70d8 SP |
1555 | struct ipoib_neigh_table *ntbl = &priv->ntbl; |
1556 | struct ipoib_neigh_hash *htbl; | |
1557 | unsigned long flags; | |
1558 | int i; | |
1559 | ||
1560 | /* remove all neigh connected to a given path or mcast */ | |
b5120a6e | 1561 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1562 | |
1563 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1564 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1565 | |
1566 | if (!htbl) | |
1567 | goto out_unlock; | |
1568 | ||
1569 | for (i = 0; i < htbl->size; i++) { | |
1570 | struct ipoib_neigh *neigh; | |
1571 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1572 | ||
1573 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1574 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1575 | /* delete neighs belong to this parent */ |
1576 | if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) { | |
1577 | rcu_assign_pointer(*np, | |
1578 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1579 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1580 | /* remove from parent list */ |
c586071d | 1581 | list_del_init(&neigh->list); |
b63b70d8 SP |
1582 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1583 | } else { | |
1584 | np = &neigh->hnext; | |
1585 | } | |
1586 | ||
1587 | } | |
1588 | } | |
1589 | out_unlock: | |
b5120a6e | 1590 | spin_unlock_irqrestore(&priv->lock, flags); |
b63b70d8 SP |
1591 | } |
1592 | ||
1593 | static void ipoib_flush_neighs(struct ipoib_dev_priv *priv) | |
1594 | { | |
1595 | struct ipoib_neigh_table *ntbl = &priv->ntbl; | |
1596 | struct ipoib_neigh_hash *htbl; | |
1597 | unsigned long flags; | |
66172c09 | 1598 | int i, wait_flushed = 0; |
b63b70d8 | 1599 | |
66172c09 | 1600 | init_completion(&priv->ntbl.flushed); |
d2e46fcc | 1601 | set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); |
b63b70d8 | 1602 | |
b5120a6e | 1603 | spin_lock_irqsave(&priv->lock, flags); |
b63b70d8 SP |
1604 | |
1605 | htbl = rcu_dereference_protected(ntbl->htbl, | |
b5120a6e | 1606 | lockdep_is_held(&priv->lock)); |
b63b70d8 SP |
1607 | if (!htbl) |
1608 | goto out_unlock; | |
1609 | ||
66172c09 SP |
1610 | wait_flushed = atomic_read(&priv->ntbl.entries); |
1611 | if (!wait_flushed) | |
1612 | goto free_htbl; | |
1613 | ||
b63b70d8 SP |
1614 | for (i = 0; i < htbl->size; i++) { |
1615 | struct ipoib_neigh *neigh; | |
1616 | struct ipoib_neigh __rcu **np = &htbl->buckets[i]; | |
1617 | ||
1618 | while ((neigh = rcu_dereference_protected(*np, | |
b5120a6e | 1619 | lockdep_is_held(&priv->lock))) != NULL) { |
b63b70d8 SP |
1620 | rcu_assign_pointer(*np, |
1621 | rcu_dereference_protected(neigh->hnext, | |
b5120a6e | 1622 | lockdep_is_held(&priv->lock))); |
b63b70d8 | 1623 | /* remove from path/mc list */ |
c586071d | 1624 | list_del_init(&neigh->list); |
b63b70d8 SP |
1625 | call_rcu(&neigh->rcu, ipoib_neigh_reclaim); |
1626 | } | |
1627 | } | |
1628 | ||
66172c09 | 1629 | free_htbl: |
b63b70d8 SP |
1630 | rcu_assign_pointer(ntbl->htbl, NULL); |
1631 | call_rcu(&htbl->rcu, neigh_hash_free_rcu); | |
1632 | ||
1633 | out_unlock: | |
b5120a6e | 1634 | spin_unlock_irqrestore(&priv->lock, flags); |
66172c09 SP |
1635 | if (wait_flushed) |
1636 | wait_for_completion(&priv->ntbl.flushed); | |
b63b70d8 SP |
1637 | } |
1638 | ||
1639 | static void ipoib_neigh_hash_uninit(struct net_device *dev) | |
1640 | { | |
c1048aff | 1641 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
b63b70d8 SP |
1642 | |
1643 | ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n"); | |
66172c09 | 1644 | init_completion(&priv->ntbl.deleted); |
b63b70d8 | 1645 | |
cda8daf1 | 1646 | cancel_delayed_work_sync(&priv->neigh_reap_task); |
b63b70d8 | 1647 | |
66172c09 SP |
1648 | ipoib_flush_neighs(priv); |
1649 | ||
1650 | wait_for_completion(&priv->ntbl.deleted); | |
b63b70d8 SP |
1651 | } |
1652 | ||
8966e28d ES |
1653 | static void ipoib_napi_add(struct net_device *dev) |
1654 | { | |
1655 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
1656 | ||
1657 | netif_napi_add(dev, &priv->recv_napi, ipoib_rx_poll, IPOIB_NUM_WC); | |
1658 | netif_napi_add(dev, &priv->send_napi, ipoib_tx_poll, MAX_SEND_CQE); | |
1659 | } | |
1660 | ||
1661 | static void ipoib_napi_del(struct net_device *dev) | |
1662 | { | |
1663 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
1664 | ||
1665 | netif_napi_del(&priv->recv_napi); | |
1666 | netif_napi_del(&priv->send_napi); | |
1667 | } | |
1668 | ||
0a1a9726 | 1669 | static void ipoib_dev_uninit_default(struct net_device *dev) |
515ed4f3 | 1670 | { |
c1048aff | 1671 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
b63b70d8 | 1672 | |
515ed4f3 ES |
1673 | ipoib_transport_dev_cleanup(dev); |
1674 | ||
8966e28d | 1675 | ipoib_napi_del(dev); |
b53d4566 | 1676 | |
515ed4f3 ES |
1677 | ipoib_cm_dev_cleanup(dev); |
1678 | ||
1679 | kfree(priv->rx_ring); | |
1680 | vfree(priv->tx_ring); | |
1681 | ||
1682 | priv->rx_ring = NULL; | |
1683 | priv->tx_ring = NULL; | |
1684 | } | |
1685 | ||
cd565b4b | 1686 | static int ipoib_dev_init_default(struct net_device *dev) |
1da177e4 | 1687 | { |
c1048aff | 1688 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 1689 | |
8966e28d | 1690 | ipoib_napi_add(dev); |
cd565b4b | 1691 | |
1da177e4 | 1692 | /* Allocate RX/TX "rings" to hold queued skbs */ |
6396bb22 KC |
1693 | priv->rx_ring = kcalloc(ipoib_recvq_size, |
1694 | sizeof(*priv->rx_ring), | |
1695 | GFP_KERNEL); | |
74226649 | 1696 | if (!priv->rx_ring) |
be7aa663 | 1697 | goto out; |
1da177e4 | 1698 | |
fad953ce KC |
1699 | priv->tx_ring = vzalloc(array_size(ipoib_sendq_size, |
1700 | sizeof(*priv->tx_ring))); | |
1da177e4 | 1701 | if (!priv->tx_ring) { |
c55359a2 YS |
1702 | pr_warn("%s: failed to allocate TX ring (%d entries)\n", |
1703 | priv->ca->name, ipoib_sendq_size); | |
1da177e4 LT |
1704 | goto out_rx_ring_cleanup; |
1705 | } | |
1da177e4 | 1706 | |
1b524963 | 1707 | /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ |
1da177e4 | 1708 | |
cd565b4b ES |
1709 | if (ipoib_transport_dev_init(dev, priv->ca)) { |
1710 | pr_warn("%s: ipoib_transport_dev_init failed\n", | |
1711 | priv->ca->name); | |
1da177e4 | 1712 | goto out_tx_ring_cleanup; |
515ed4f3 ES |
1713 | } |
1714 | ||
cd565b4b ES |
1715 | /* after qp created set dev address */ |
1716 | priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff; | |
1717 | priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff; | |
1718 | priv->dev->dev_addr[3] = (priv->qp->qp_num) & 0xff; | |
1719 | ||
515ed4f3 ES |
1720 | return 0; |
1721 | ||
1722 | out_tx_ring_cleanup: | |
1723 | vfree(priv->tx_ring); | |
1724 | ||
1725 | out_rx_ring_cleanup: | |
1726 | kfree(priv->rx_ring); | |
1727 | ||
1728 | out: | |
8966e28d | 1729 | ipoib_napi_del(dev); |
515ed4f3 ES |
1730 | return -ENOMEM; |
1731 | } | |
1732 | ||
31a82362 FD |
1733 | static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr, |
1734 | int cmd) | |
1735 | { | |
1736 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
1737 | ||
1738 | if (!priv->rn_ops->ndo_do_ioctl) | |
1739 | return -EOPNOTSUPP; | |
1740 | ||
1741 | return priv->rn_ops->ndo_do_ioctl(dev, ifr, cmd); | |
1742 | } | |
1743 | ||
eaeb3984 | 1744 | static int ipoib_dev_init(struct net_device *dev) |
515ed4f3 | 1745 | { |
c1048aff | 1746 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
515ed4f3 ES |
1747 | int ret = -ENOMEM; |
1748 | ||
515ed4f3 | 1749 | priv->qp = NULL; |
1da177e4 | 1750 | |
be7aa663 | 1751 | /* |
515ed4f3 ES |
1752 | * the various IPoIB tasks assume they will never race against |
1753 | * themselves, so always use a single thread workqueue | |
be7aa663 | 1754 | */ |
515ed4f3 ES |
1755 | priv->wq = alloc_ordered_workqueue("ipoib_wq", WQ_MEM_RECLAIM); |
1756 | if (!priv->wq) { | |
1757 | pr_warn("%s: failed to allocate device WQ\n", dev->name); | |
1758 | goto out; | |
1759 | } | |
1760 | ||
1761 | /* create pd, which used both for control and datapath*/ | |
1762 | priv->pd = ib_alloc_pd(priv->ca, 0); | |
1763 | if (IS_ERR(priv->pd)) { | |
eaeb3984 | 1764 | pr_warn("%s: failed to allocate PD\n", priv->ca->name); |
515ed4f3 ES |
1765 | goto clean_wq; |
1766 | } | |
1767 | ||
cd565b4b | 1768 | ret = priv->rn_ops->ndo_init(dev); |
515ed4f3 ES |
1769 | if (ret) { |
1770 | pr_warn("%s failed to init HW resource\n", dev->name); | |
1771 | goto out_free_pd; | |
1772 | } | |
1773 | ||
99a7e2bf WY |
1774 | ret = ipoib_neigh_hash_init(priv); |
1775 | if (ret) { | |
515ed4f3 | 1776 | pr_warn("%s failed to init neigh hash\n", dev->name); |
be7aa663 | 1777 | goto out_dev_uninit; |
515ed4f3 ES |
1778 | } |
1779 | ||
1780 | if (dev->flags & IFF_UP) { | |
1781 | if (ipoib_ib_dev_open(dev)) { | |
1782 | pr_warn("%s failed to open device\n", dev->name); | |
1783 | ret = -ENODEV; | |
cda8daf1 | 1784 | goto out_hash_uninit; |
515ed4f3 ES |
1785 | } |
1786 | } | |
be7aa663 | 1787 | |
1da177e4 LT |
1788 | return 0; |
1789 | ||
cda8daf1 ES |
1790 | out_hash_uninit: |
1791 | ipoib_neigh_hash_uninit(dev); | |
1792 | ||
be7aa663 DL |
1793 | out_dev_uninit: |
1794 | ipoib_ib_dev_cleanup(dev); | |
1795 | ||
515ed4f3 ES |
1796 | out_free_pd: |
1797 | if (priv->pd) { | |
1798 | ib_dealloc_pd(priv->pd); | |
1799 | priv->pd = NULL; | |
1800 | } | |
1da177e4 | 1801 | |
515ed4f3 ES |
1802 | clean_wq: |
1803 | if (priv->wq) { | |
1804 | destroy_workqueue(priv->wq); | |
1805 | priv->wq = NULL; | |
1806 | } | |
1da177e4 LT |
1807 | |
1808 | out: | |
515ed4f3 | 1809 | return ret; |
1da177e4 LT |
1810 | } |
1811 | ||
7cbee87c JG |
1812 | /* |
1813 | * This must be called before doing an unregister_netdev on a parent device to | |
1814 | * shutdown the IB event handler. | |
1815 | */ | |
1816 | static void ipoib_parent_unregister_pre(struct net_device *ndev) | |
1817 | { | |
1818 | struct ipoib_dev_priv *priv = ipoib_priv(ndev); | |
1819 | ||
1820 | /* | |
1821 | * ipoib_set_mac checks netif_running before pushing work, clearing | |
1822 | * running ensures the it will not add more work. | |
1823 | */ | |
1824 | rtnl_lock(); | |
1825 | dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); | |
1826 | rtnl_unlock(); | |
1827 | ||
1828 | /* ipoib_event() cannot be running once this returns */ | |
1829 | ib_unregister_event_handler(&priv->event_handler); | |
1830 | ||
1831 | /* | |
1832 | * Work on the queue grabs the rtnl lock, so this cannot be done while | |
1833 | * also holding it. | |
1834 | */ | |
1835 | flush_workqueue(ipoib_workqueue); | |
1836 | } | |
1837 | ||
eaeb3984 JG |
1838 | static void ipoib_set_dev_features(struct ipoib_dev_priv *priv) |
1839 | { | |
1840 | priv->hca_caps = priv->ca->attrs.device_cap_flags; | |
1841 | ||
1842 | if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { | |
1843 | priv->dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM; | |
1844 | ||
1845 | if (priv->hca_caps & IB_DEVICE_UD_TSO) | |
1846 | priv->dev->hw_features |= NETIF_F_TSO; | |
1847 | ||
1848 | priv->dev->features |= priv->dev->hw_features; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | static int ipoib_parent_init(struct net_device *ndev) | |
1853 | { | |
1854 | struct ipoib_dev_priv *priv = ipoib_priv(ndev); | |
1855 | struct ib_port_attr attr; | |
1856 | int result; | |
1857 | ||
1858 | result = ib_query_port(priv->ca, priv->port, &attr); | |
1859 | if (result) { | |
1860 | pr_warn("%s: ib_query_port %d failed\n", priv->ca->name, | |
1861 | priv->port); | |
1862 | return result; | |
1863 | } | |
1864 | priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); | |
1865 | ||
1866 | result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); | |
1867 | if (result) { | |
1868 | pr_warn("%s: ib_query_pkey port %d failed (ret = %d)\n", | |
1869 | priv->ca->name, priv->port, result); | |
1870 | return result; | |
1871 | } | |
1872 | ||
1873 | result = rdma_query_gid(priv->ca, priv->port, 0, &priv->local_gid); | |
1874 | if (result) { | |
1875 | pr_warn("%s: rdma_query_gid port %d failed (ret = %d)\n", | |
1876 | priv->ca->name, priv->port, result); | |
1877 | return result; | |
1878 | } | |
1879 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, | |
1880 | sizeof(union ib_gid)); | |
1881 | ||
1882 | SET_NETDEV_DEV(priv->dev, priv->ca->dev.parent); | |
1883 | priv->dev->dev_id = priv->port - 1; | |
1884 | ||
1885 | return 0; | |
1886 | } | |
1887 | ||
1888 | static void ipoib_child_init(struct net_device *ndev) | |
1889 | { | |
1890 | struct ipoib_dev_priv *priv = ipoib_priv(ndev); | |
1891 | struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent); | |
1892 | ||
1893 | priv->max_ib_mtu = ppriv->max_ib_mtu; | |
1894 | set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); | |
1895 | memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN); | |
1896 | memcpy(&priv->local_gid, &ppriv->local_gid, sizeof(priv->local_gid)); | |
1897 | } | |
1898 | ||
1899 | static int ipoib_ndo_init(struct net_device *ndev) | |
1900 | { | |
1901 | struct ipoib_dev_priv *priv = ipoib_priv(ndev); | |
1902 | int rc; | |
1903 | ||
1904 | if (priv->parent) { | |
1905 | ipoib_child_init(ndev); | |
1906 | } else { | |
1907 | rc = ipoib_parent_init(ndev); | |
1908 | if (rc) | |
1909 | return rc; | |
1910 | } | |
1911 | ||
1912 | /* MTU will be reset when mcast join happens */ | |
1913 | ndev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); | |
1914 | priv->mcast_mtu = priv->admin_mtu = ndev->mtu; | |
1915 | ndev->max_mtu = IPOIB_CM_MTU; | |
1916 | ||
1917 | ndev->neigh_priv_len = sizeof(struct ipoib_neigh); | |
1918 | ||
1919 | /* | |
1920 | * Set the full membership bit, so that we join the right | |
1921 | * broadcast group, etc. | |
1922 | */ | |
1923 | priv->pkey |= 0x8000; | |
1924 | ||
1925 | ndev->broadcast[8] = priv->pkey >> 8; | |
1926 | ndev->broadcast[9] = priv->pkey & 0xff; | |
1927 | set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); | |
1928 | ||
1929 | ipoib_set_dev_features(priv); | |
1930 | ||
1931 | rc = ipoib_dev_init(ndev); | |
1932 | if (rc) { | |
1933 | pr_warn("%s: failed to initialize device: %s port %d (ret = %d)\n", | |
1934 | priv->ca->name, priv->dev->name, priv->port, rc); | |
1935 | } | |
1936 | ||
1937 | return 0; | |
1938 | } | |
1939 | ||
7cbee87c | 1940 | static void ipoib_ndo_uninit(struct net_device *dev) |
1da177e4 | 1941 | { |
25405d98 | 1942 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
9baa0b03 OG |
1943 | |
1944 | ASSERT_RTNL(); | |
1da177e4 | 1945 | |
25405d98 JG |
1946 | /* |
1947 | * ipoib_remove_one guarantees the children are removed before the | |
1948 | * parent, and that is the only place where a parent can be removed. | |
1949 | */ | |
1950 | WARN_ON(!list_empty(&priv->child_intfs)); | |
1da177e4 | 1951 | |
be7aa663 DL |
1952 | ipoib_neigh_hash_uninit(dev); |
1953 | ||
1da177e4 LT |
1954 | ipoib_ib_dev_cleanup(dev); |
1955 | ||
515ed4f3 ES |
1956 | /* no more works over the priv->wq */ |
1957 | if (priv->wq) { | |
1958 | flush_workqueue(priv->wq); | |
1959 | destroy_workqueue(priv->wq); | |
1960 | priv->wq = NULL; | |
1961 | } | |
1da177e4 LT |
1962 | } |
1963 | ||
9c3c5f8e EC |
1964 | static int ipoib_set_vf_link_state(struct net_device *dev, int vf, int link_state) |
1965 | { | |
c1048aff | 1966 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
9c3c5f8e EC |
1967 | |
1968 | return ib_set_vf_link_state(priv->ca, vf, priv->port, link_state); | |
1969 | } | |
1970 | ||
1971 | static int ipoib_get_vf_config(struct net_device *dev, int vf, | |
1972 | struct ifla_vf_info *ivf) | |
1973 | { | |
c1048aff | 1974 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
9c3c5f8e EC |
1975 | int err; |
1976 | ||
1977 | err = ib_get_vf_config(priv->ca, vf, priv->port, ivf); | |
1978 | if (err) | |
1979 | return err; | |
1980 | ||
1981 | ivf->vf = vf; | |
1982 | ||
1983 | return 0; | |
1984 | } | |
1985 | ||
1986 | static int ipoib_set_vf_guid(struct net_device *dev, int vf, u64 guid, int type) | |
1987 | { | |
c1048aff | 1988 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
9c3c5f8e EC |
1989 | |
1990 | if (type != IFLA_VF_IB_NODE_GUID && type != IFLA_VF_IB_PORT_GUID) | |
1991 | return -EINVAL; | |
1992 | ||
1993 | return ib_set_vf_guid(priv->ca, vf, priv->port, guid, type); | |
1994 | } | |
1995 | ||
1996 | static int ipoib_get_vf_stats(struct net_device *dev, int vf, | |
1997 | struct ifla_vf_stats *vf_stats) | |
1998 | { | |
c1048aff | 1999 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
9c3c5f8e EC |
2000 | |
2001 | return ib_get_vf_stats(priv->ca, vf, priv->port, vf_stats); | |
2002 | } | |
2003 | ||
3b04ddde SH |
2004 | static const struct header_ops ipoib_header_ops = { |
2005 | .create = ipoib_hard_header, | |
2006 | }; | |
2007 | ||
9c3c5f8e | 2008 | static const struct net_device_ops ipoib_netdev_ops_pf = { |
eaeb3984 | 2009 | .ndo_init = ipoib_ndo_init, |
7cbee87c | 2010 | .ndo_uninit = ipoib_ndo_uninit, |
9c3c5f8e EC |
2011 | .ndo_open = ipoib_open, |
2012 | .ndo_stop = ipoib_stop, | |
2013 | .ndo_change_mtu = ipoib_change_mtu, | |
2014 | .ndo_fix_features = ipoib_fix_features, | |
2015 | .ndo_start_xmit = ipoib_start_xmit, | |
2016 | .ndo_tx_timeout = ipoib_timeout, | |
2017 | .ndo_set_rx_mode = ipoib_set_mcast_list, | |
2018 | .ndo_get_iflink = ipoib_get_iflink, | |
2019 | .ndo_set_vf_link_state = ipoib_set_vf_link_state, | |
2020 | .ndo_get_vf_config = ipoib_get_vf_config, | |
2021 | .ndo_get_vf_stats = ipoib_get_vf_stats, | |
2022 | .ndo_set_vf_guid = ipoib_set_vf_guid, | |
492a7e67 | 2023 | .ndo_set_mac_address = ipoib_set_mac, |
b6c871e5 | 2024 | .ndo_get_stats64 = ipoib_get_stats, |
31a82362 | 2025 | .ndo_do_ioctl = ipoib_ioctl, |
9c3c5f8e EC |
2026 | }; |
2027 | ||
2028 | static const struct net_device_ops ipoib_netdev_ops_vf = { | |
eaeb3984 | 2029 | .ndo_init = ipoib_ndo_init, |
7cbee87c | 2030 | .ndo_uninit = ipoib_ndo_uninit, |
fe8114e8 SH |
2031 | .ndo_open = ipoib_open, |
2032 | .ndo_stop = ipoib_stop, | |
2033 | .ndo_change_mtu = ipoib_change_mtu, | |
3d96c74d | 2034 | .ndo_fix_features = ipoib_fix_features, |
fe8114e8 SH |
2035 | .ndo_start_xmit = ipoib_start_xmit, |
2036 | .ndo_tx_timeout = ipoib_timeout, | |
afc4b13d | 2037 | .ndo_set_rx_mode = ipoib_set_mcast_list, |
5aa7add8 | 2038 | .ndo_get_iflink = ipoib_get_iflink, |
eb54714d | 2039 | .ndo_get_stats64 = ipoib_get_stats, |
31a82362 | 2040 | .ndo_do_ioctl = ipoib_ioctl, |
fe8114e8 SH |
2041 | }; |
2042 | ||
cd565b4b | 2043 | void ipoib_setup_common(struct net_device *dev) |
1da177e4 | 2044 | { |
2337f809 | 2045 | dev->header_ops = &ipoib_header_ops; |
bea3348e | 2046 | |
82c24c18 EC |
2047 | ipoib_set_ethtool_ops(dev); |
2048 | ||
2337f809 | 2049 | dev->watchdog_timeo = HZ; |
1da177e4 | 2050 | |
2337f809 | 2051 | dev->flags |= IFF_BROADCAST | IFF_MULTICAST; |
1da177e4 | 2052 | |
fc791b63 | 2053 | dev->hard_header_len = IPOIB_HARD_LEN; |
2337f809 RD |
2054 | dev->addr_len = INFINIBAND_ALEN; |
2055 | dev->type = ARPHRD_INFINIBAND; | |
2056 | dev->tx_queue_len = ipoib_sendq_size * 2; | |
eb14032f | 2057 | dev->features = (NETIF_F_VLAN_CHALLENGED | |
eb14032f | 2058 | NETIF_F_HIGHDMA); |
02875878 | 2059 | netif_keep_dst(dev); |
1da177e4 | 2060 | |
1da177e4 | 2061 | memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
9f49a5b5 JG |
2062 | |
2063 | /* | |
2064 | * unregister_netdev always frees the netdev, we use this mode | |
2065 | * consistently to unify all the various unregister paths, including | |
2066 | * those connected to rtnl_link_ops which require it. | |
2067 | */ | |
2068 | dev->needs_free_netdev = true; | |
cd565b4b | 2069 | } |
1da177e4 | 2070 | |
cd565b4b ES |
2071 | static void ipoib_build_priv(struct net_device *dev) |
2072 | { | |
2073 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
1da177e4 | 2074 | |
cd565b4b | 2075 | priv->dev = dev; |
1da177e4 | 2076 | spin_lock_init(&priv->lock); |
f47944cc | 2077 | init_rwsem(&priv->vlan_rwsem); |
edf3f301 | 2078 | mutex_init(&priv->mcast_mutex); |
1da177e4 LT |
2079 | |
2080 | INIT_LIST_HEAD(&priv->path_list); | |
2081 | INIT_LIST_HEAD(&priv->child_intfs); | |
2082 | INIT_LIST_HEAD(&priv->dead_ahs); | |
2083 | INIT_LIST_HEAD(&priv->multicast_list); | |
2084 | ||
c4028958 | 2085 | INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
e8224e4b | 2086 | INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); |
ee1e2c82 MS |
2087 | INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); |
2088 | INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); | |
2089 | INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); | |
c4028958 DH |
2090 | INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); |
2091 | INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); | |
b63b70d8 | 2092 | INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh); |
1da177e4 LT |
2093 | } |
2094 | ||
cd565b4b ES |
2095 | static const struct net_device_ops ipoib_netdev_default_pf = { |
2096 | .ndo_init = ipoib_dev_init_default, | |
2097 | .ndo_uninit = ipoib_dev_uninit_default, | |
2098 | .ndo_open = ipoib_ib_dev_open_default, | |
2099 | .ndo_stop = ipoib_ib_dev_stop_default, | |
2100 | }; | |
2101 | ||
2102 | static struct net_device | |
2103 | *ipoib_create_netdev_default(struct ib_device *hca, | |
2104 | const char *name, | |
2105 | unsigned char name_assign_type, | |
2106 | void (*setup)(struct net_device *)) | |
1da177e4 LT |
2107 | { |
2108 | struct net_device *dev; | |
cd565b4b | 2109 | struct rdma_netdev *rn; |
1da177e4 | 2110 | |
cd565b4b ES |
2111 | dev = alloc_netdev((int)sizeof(struct rdma_netdev), |
2112 | name, | |
2113 | name_assign_type, setup); | |
1da177e4 LT |
2114 | if (!dev) |
2115 | return NULL; | |
2116 | ||
cd565b4b ES |
2117 | rn = netdev_priv(dev); |
2118 | ||
2119 | rn->send = ipoib_send; | |
2120 | rn->attach_mcast = ipoib_mcast_attach; | |
2121 | rn->detach_mcast = ipoib_mcast_detach; | |
2122 | rn->hca = hca; | |
cd565b4b ES |
2123 | dev->netdev_ops = &ipoib_netdev_default_pf; |
2124 | ||
2125 | return dev; | |
2126 | } | |
2127 | ||
2128 | static struct net_device *ipoib_get_netdev(struct ib_device *hca, u8 port, | |
2129 | const char *name) | |
2130 | { | |
2131 | struct net_device *dev; | |
2132 | ||
2133 | if (hca->alloc_rdma_netdev) { | |
2134 | dev = hca->alloc_rdma_netdev(hca, port, | |
2135 | RDMA_NETDEV_IPOIB, name, | |
2136 | NET_NAME_UNKNOWN, | |
2137 | ipoib_setup_common); | |
2138 | if (IS_ERR_OR_NULL(dev) && PTR_ERR(dev) != -EOPNOTSUPP) | |
2139 | return NULL; | |
2140 | } | |
2141 | ||
2142 | if (!hca->alloc_rdma_netdev || PTR_ERR(dev) == -EOPNOTSUPP) | |
2143 | dev = ipoib_create_netdev_default(hca, name, NET_NAME_UNKNOWN, | |
2144 | ipoib_setup_common); | |
2145 | ||
2146 | return dev; | |
2147 | } | |
2148 | ||
2149 | struct ipoib_dev_priv *ipoib_intf_alloc(struct ib_device *hca, u8 port, | |
2150 | const char *name) | |
2151 | { | |
2152 | struct net_device *dev; | |
2153 | struct ipoib_dev_priv *priv; | |
2154 | struct rdma_netdev *rn; | |
2155 | ||
2156 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
2157 | if (!priv) | |
2158 | return NULL; | |
2159 | ||
eaeb3984 JG |
2160 | priv->ca = hca; |
2161 | priv->port = port; | |
2162 | ||
cd565b4b ES |
2163 | dev = ipoib_get_netdev(hca, port, name); |
2164 | if (!dev) | |
2165 | goto free_priv; | |
2166 | ||
2167 | priv->rn_ops = dev->netdev_ops; | |
2168 | ||
2169 | /* fixme : should be after the query_cap */ | |
2170 | if (priv->hca_caps & IB_DEVICE_VIRTUAL_FUNCTION) | |
2171 | dev->netdev_ops = &ipoib_netdev_ops_vf; | |
2172 | else | |
2173 | dev->netdev_ops = &ipoib_netdev_ops_pf; | |
2174 | ||
2175 | rn = netdev_priv(dev); | |
2176 | rn->clnt_priv = priv; | |
9f49a5b5 JG |
2177 | |
2178 | /* | |
2179 | * Only the child register_netdev flows can handle priv_destructor | |
2180 | * being set, so we force it to NULL here and handle manually until it | |
2181 | * is safe to turn on. | |
2182 | */ | |
2183 | priv->next_priv_destructor = dev->priv_destructor; | |
2184 | dev->priv_destructor = NULL; | |
2185 | ||
cd565b4b ES |
2186 | ipoib_build_priv(dev); |
2187 | ||
2188 | return priv; | |
2189 | free_priv: | |
2190 | kfree(priv); | |
2191 | return NULL; | |
1da177e4 LT |
2192 | } |
2193 | ||
9f49a5b5 JG |
2194 | void ipoib_intf_free(struct net_device *dev) |
2195 | { | |
2196 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
2197 | struct rdma_netdev *rn = netdev_priv(dev); | |
2198 | ||
2199 | dev->priv_destructor = priv->next_priv_destructor; | |
2200 | if (dev->priv_destructor) | |
2201 | dev->priv_destructor(dev); | |
2202 | ||
2203 | /* | |
2204 | * There are some error flows around register_netdev failing that may | |
2205 | * attempt to call priv_destructor twice, prevent that from happening. | |
2206 | */ | |
2207 | dev->priv_destructor = NULL; | |
2208 | ||
2209 | /* unregister/destroy is very complicated. Make bugs more obvious. */ | |
2210 | rn->clnt_priv = NULL; | |
2211 | ||
2212 | kfree(priv); | |
2213 | } | |
2214 | ||
43cb76d9 GKH |
2215 | static ssize_t show_pkey(struct device *dev, |
2216 | struct device_attribute *attr, char *buf) | |
1da177e4 | 2217 | { |
c1048aff ES |
2218 | struct net_device *ndev = to_net_dev(dev); |
2219 | struct ipoib_dev_priv *priv = ipoib_priv(ndev); | |
1da177e4 LT |
2220 | |
2221 | return sprintf(buf, "0x%04x\n", priv->pkey); | |
2222 | } | |
43cb76d9 | 2223 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); |
1da177e4 | 2224 | |
335a64a5 OG |
2225 | static ssize_t show_umcast(struct device *dev, |
2226 | struct device_attribute *attr, char *buf) | |
2227 | { | |
c1048aff ES |
2228 | struct net_device *ndev = to_net_dev(dev); |
2229 | struct ipoib_dev_priv *priv = ipoib_priv(ndev); | |
335a64a5 OG |
2230 | |
2231 | return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); | |
2232 | } | |
2233 | ||
862096a8 | 2234 | void ipoib_set_umcast(struct net_device *ndev, int umcast_val) |
335a64a5 | 2235 | { |
c1048aff | 2236 | struct ipoib_dev_priv *priv = ipoib_priv(ndev); |
335a64a5 OG |
2237 | |
2238 | if (umcast_val > 0) { | |
2239 | set_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
2240 | ipoib_warn(priv, "ignoring multicast groups joined directly " | |
2241 | "by userspace\n"); | |
2242 | } else | |
2243 | clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); | |
862096a8 OG |
2244 | } |
2245 | ||
2246 | static ssize_t set_umcast(struct device *dev, | |
2247 | struct device_attribute *attr, | |
2248 | const char *buf, size_t count) | |
2249 | { | |
2250 | unsigned long umcast_val = simple_strtoul(buf, NULL, 0); | |
2251 | ||
2252 | ipoib_set_umcast(to_net_dev(dev), umcast_val); | |
335a64a5 OG |
2253 | |
2254 | return count; | |
2255 | } | |
2256 | static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); | |
2257 | ||
2258 | int ipoib_add_umcast_attr(struct net_device *dev) | |
2259 | { | |
2260 | return device_create_file(&dev->dev, &dev_attr_umcast); | |
2261 | } | |
2262 | ||
492a7e67 MB |
2263 | static void set_base_guid(struct ipoib_dev_priv *priv, union ib_gid *gid) |
2264 | { | |
2265 | struct ipoib_dev_priv *child_priv; | |
2266 | struct net_device *netdev = priv->dev; | |
2267 | ||
9b29953b | 2268 | netif_addr_lock_bh(netdev); |
492a7e67 MB |
2269 | |
2270 | memcpy(&priv->local_gid.global.interface_id, | |
2271 | &gid->global.interface_id, | |
2272 | sizeof(gid->global.interface_id)); | |
2273 | memcpy(netdev->dev_addr + 4, &priv->local_gid, sizeof(priv->local_gid)); | |
2274 | clear_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); | |
2275 | ||
9b29953b | 2276 | netif_addr_unlock_bh(netdev); |
492a7e67 MB |
2277 | |
2278 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
2279 | down_read(&priv->vlan_rwsem); | |
2280 | list_for_each_entry(child_priv, &priv->child_intfs, list) | |
2281 | set_base_guid(child_priv, gid); | |
2282 | up_read(&priv->vlan_rwsem); | |
2283 | } | |
2284 | } | |
2285 | ||
2286 | static int ipoib_check_lladdr(struct net_device *dev, | |
2287 | struct sockaddr_storage *ss) | |
2288 | { | |
2289 | union ib_gid *gid = (union ib_gid *)(ss->__data + 4); | |
2290 | int ret = 0; | |
2291 | ||
9b29953b | 2292 | netif_addr_lock_bh(dev); |
492a7e67 MB |
2293 | |
2294 | /* Make sure the QPN, reserved and subnet prefix match the current | |
2295 | * lladdr, it also makes sure the lladdr is unicast. | |
2296 | */ | |
2297 | if (memcmp(dev->dev_addr, ss->__data, | |
2298 | 4 + sizeof(gid->global.subnet_prefix)) || | |
2299 | gid->global.interface_id == 0) | |
2300 | ret = -EINVAL; | |
2301 | ||
9b29953b | 2302 | netif_addr_unlock_bh(dev); |
492a7e67 MB |
2303 | |
2304 | return ret; | |
2305 | } | |
2306 | ||
2307 | static int ipoib_set_mac(struct net_device *dev, void *addr) | |
2308 | { | |
c1048aff | 2309 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
492a7e67 MB |
2310 | struct sockaddr_storage *ss = addr; |
2311 | int ret; | |
2312 | ||
2313 | if (!(dev->priv_flags & IFF_LIVE_ADDR_CHANGE) && netif_running(dev)) | |
2314 | return -EBUSY; | |
2315 | ||
2316 | ret = ipoib_check_lladdr(dev, ss); | |
2317 | if (ret) | |
2318 | return ret; | |
2319 | ||
2320 | set_base_guid(priv, (union ib_gid *)(ss->__data + 4)); | |
2321 | ||
2322 | queue_work(ipoib_workqueue, &priv->flush_light); | |
2323 | ||
2324 | return 0; | |
2325 | } | |
2326 | ||
43cb76d9 GKH |
2327 | static ssize_t create_child(struct device *dev, |
2328 | struct device_attribute *attr, | |
1da177e4 LT |
2329 | const char *buf, size_t count) |
2330 | { | |
2331 | int pkey; | |
2332 | int ret; | |
2333 | ||
2334 | if (sscanf(buf, "%i", &pkey) != 1) | |
2335 | return -EINVAL; | |
2336 | ||
3d790a4c | 2337 | if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000) |
1da177e4 LT |
2338 | return -EINVAL; |
2339 | ||
43cb76d9 | 2340 | ret = ipoib_vlan_add(to_net_dev(dev), pkey); |
1da177e4 LT |
2341 | |
2342 | return ret ? ret : count; | |
2343 | } | |
7a52b34b | 2344 | static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); |
1da177e4 | 2345 | |
43cb76d9 GKH |
2346 | static ssize_t delete_child(struct device *dev, |
2347 | struct device_attribute *attr, | |
1da177e4 LT |
2348 | const char *buf, size_t count) |
2349 | { | |
2350 | int pkey; | |
2351 | int ret; | |
2352 | ||
2353 | if (sscanf(buf, "%i", &pkey) != 1) | |
2354 | return -EINVAL; | |
2355 | ||
2356 | if (pkey < 0 || pkey > 0xffff) | |
2357 | return -EINVAL; | |
2358 | ||
43cb76d9 | 2359 | ret = ipoib_vlan_delete(to_net_dev(dev), pkey); |
1da177e4 LT |
2360 | |
2361 | return ret ? ret : count; | |
2362 | ||
2363 | } | |
7a52b34b | 2364 | static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); |
1da177e4 LT |
2365 | |
2366 | int ipoib_add_pkey_attr(struct net_device *dev) | |
2367 | { | |
43cb76d9 | 2368 | return device_create_file(&dev->dev, &dev_attr_pkey); |
1da177e4 LT |
2369 | } |
2370 | ||
2371 | static struct net_device *ipoib_add_port(const char *format, | |
2372 | struct ib_device *hca, u8 port) | |
2373 | { | |
2374 | struct ipoib_dev_priv *priv; | |
9f49a5b5 | 2375 | struct net_device *ndev; |
eaeb3984 | 2376 | int result; |
1da177e4 | 2377 | |
cd565b4b | 2378 | priv = ipoib_intf_alloc(hca, port, format); |
ac6dbf7f YS |
2379 | if (!priv) { |
2380 | pr_warn("%s, %d: ipoib_intf_alloc failed\n", hca->name, port); | |
eaeb3984 | 2381 | return ERR_PTR(-ENOMEM); |
1da177e4 | 2382 | } |
9f49a5b5 | 2383 | ndev = priv->dev; |
1da177e4 LT |
2384 | |
2385 | INIT_IB_EVENT_HANDLER(&priv->event_handler, | |
2386 | priv->ca, ipoib_event); | |
dcc9881e | 2387 | ib_register_event_handler(&priv->event_handler); |
1da177e4 | 2388 | |
10293610 AE |
2389 | /* call event handler to ensure pkey in sync */ |
2390 | queue_work(ipoib_workqueue, &priv->flush_heavy); | |
2391 | ||
9f49a5b5 | 2392 | result = register_netdev(ndev); |
1da177e4 | 2393 | if (result) { |
c55359a2 YS |
2394 | pr_warn("%s: couldn't register ipoib port %d; error %d\n", |
2395 | hca->name, port, result); | |
9f49a5b5 JG |
2396 | |
2397 | ipoib_parent_unregister_pre(ndev); | |
2398 | ipoib_intf_free(ndev); | |
2399 | free_netdev(ndev); | |
2400 | ||
2401 | return ERR_PTR(result); | |
1da177e4 LT |
2402 | } |
2403 | ||
9f49a5b5 JG |
2404 | /* |
2405 | * We cannot set priv_destructor before register_netdev because we | |
2406 | * need priv to be always valid during the error flow to execute | |
2407 | * ipoib_parent_unregister_pre(). Instead handle it manually and only | |
2408 | * enter priv_destructor mode once we are completely registered. | |
2409 | */ | |
2410 | ndev->priv_destructor = ipoib_intf_free; | |
2411 | ||
2412 | if (ipoib_cm_add_mode_attr(ndev)) | |
839fcaba | 2413 | goto sysfs_failed; |
9f49a5b5 | 2414 | if (ipoib_add_pkey_attr(ndev)) |
1da177e4 | 2415 | goto sysfs_failed; |
9f49a5b5 | 2416 | if (ipoib_add_umcast_attr(ndev)) |
335a64a5 | 2417 | goto sysfs_failed; |
9f49a5b5 | 2418 | if (device_create_file(&ndev->dev, &dev_attr_create_child)) |
1da177e4 | 2419 | goto sysfs_failed; |
9f49a5b5 | 2420 | if (device_create_file(&ndev->dev, &dev_attr_delete_child)) |
1da177e4 LT |
2421 | goto sysfs_failed; |
2422 | ||
9f49a5b5 | 2423 | return ndev; |
1da177e4 LT |
2424 | |
2425 | sysfs_failed: | |
9f49a5b5 JG |
2426 | ipoib_parent_unregister_pre(ndev); |
2427 | unregister_netdev(ndev); | |
2428 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
2429 | } |
2430 | ||
2431 | static void ipoib_add_one(struct ib_device *device) | |
2432 | { | |
2433 | struct list_head *dev_list; | |
2434 | struct net_device *dev; | |
2435 | struct ipoib_dev_priv *priv; | |
4139032b | 2436 | int p; |
8e37ab68 | 2437 | int count = 0; |
07ebafba | 2438 | |
b1b63970 | 2439 | dev_list = kmalloc(sizeof(*dev_list), GFP_KERNEL); |
1da177e4 LT |
2440 | if (!dev_list) |
2441 | return; | |
2442 | ||
2443 | INIT_LIST_HEAD(dev_list); | |
2444 | ||
4139032b | 2445 | for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) { |
8e37ab68 | 2446 | if (!rdma_protocol_ib(device, p)) |
7b4c8769 | 2447 | continue; |
1da177e4 LT |
2448 | dev = ipoib_add_port("ib%d", device, p); |
2449 | if (!IS_ERR(dev)) { | |
c1048aff | 2450 | priv = ipoib_priv(dev); |
1da177e4 | 2451 | list_add_tail(&priv->list, dev_list); |
8e37ab68 | 2452 | count++; |
1da177e4 LT |
2453 | } |
2454 | } | |
2455 | ||
8e37ab68 | 2456 | if (!count) { |
ac6dbf7f | 2457 | kfree(dev_list); |
8e37ab68 MW |
2458 | return; |
2459 | } | |
2460 | ||
1da177e4 LT |
2461 | ib_set_client_data(device, &ipoib_client, dev_list); |
2462 | } | |
2463 | ||
7c1eb45a | 2464 | static void ipoib_remove_one(struct ib_device *device, void *client_data) |
1da177e4 | 2465 | { |
25405d98 | 2466 | struct ipoib_dev_priv *priv, *tmp, *cpriv, *tcpriv; |
7c1eb45a | 2467 | struct list_head *dev_list = client_data; |
1da177e4 | 2468 | |
5a2815f0 IG |
2469 | if (!dev_list) |
2470 | return; | |
1da177e4 LT |
2471 | |
2472 | list_for_each_entry_safe(priv, tmp, dev_list, list) { | |
25405d98 | 2473 | LIST_HEAD(head); |
7cbee87c | 2474 | ipoib_parent_unregister_pre(priv->dev); |
1da177e4 | 2475 | |
25405d98 JG |
2476 | rtnl_lock(); |
2477 | ||
2478 | list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, | |
2479 | list) | |
2480 | unregister_netdevice_queue(cpriv->dev, &head); | |
2481 | unregister_netdevice_queue(priv->dev, &head); | |
2482 | unregister_netdevice_many(&head); | |
2483 | ||
2484 | rtnl_unlock(); | |
1da177e4 | 2485 | } |
06c56e44 MT |
2486 | |
2487 | kfree(dev_list); | |
1da177e4 LT |
2488 | } |
2489 | ||
771a5258 SR |
2490 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
2491 | static struct notifier_block ipoib_netdev_notifier = { | |
2492 | .notifier_call = ipoib_netdev_event, | |
2493 | }; | |
2494 | #endif | |
2495 | ||
1da177e4 LT |
2496 | static int __init ipoib_init_module(void) |
2497 | { | |
2498 | int ret; | |
2499 | ||
0f485251 SM |
2500 | ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); |
2501 | ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); | |
2502 | ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); | |
2503 | ||
2504 | ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); | |
2505 | ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); | |
732eacc0 | 2506 | ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); |
68e995a2 PS |
2507 | #ifdef CONFIG_INFINIBAND_IPOIB_CM |
2508 | ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); | |
11f74b40 | 2509 | ipoib_max_conn_qp = max(ipoib_max_conn_qp, 0); |
68e995a2 | 2510 | #endif |
0f485251 | 2511 | |
f89271da EC |
2512 | /* |
2513 | * When copying small received packets, we only copy from the | |
2514 | * linear data part of the SKB, so we rely on this condition. | |
2515 | */ | |
2516 | BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); | |
2517 | ||
1da177e4 LT |
2518 | ret = ipoib_register_debugfs(); |
2519 | if (ret) | |
2520 | return ret; | |
2521 | ||
2522 | /* | |
0b39578b DL |
2523 | * We create a global workqueue here that is used for all flush |
2524 | * operations. However, if you attempt to flush a workqueue | |
2525 | * from a task on that same workqueue, it deadlocks the system. | |
2526 | * We want to be able to flush the tasks associated with a | |
2527 | * specific net device, so we also create a workqueue for each | |
2528 | * netdevice. We queue up the tasks for that device only on | |
2529 | * its private workqueue, and we only queue up flush events | |
2530 | * on our global flush workqueue. This avoids the deadlocks. | |
1da177e4 | 2531 | */ |
ee190ab7 | 2532 | ipoib_workqueue = alloc_ordered_workqueue("ipoib_flush", 0); |
1da177e4 LT |
2533 | if (!ipoib_workqueue) { |
2534 | ret = -ENOMEM; | |
2535 | goto err_fs; | |
2536 | } | |
2537 | ||
c1a0b23b MT |
2538 | ib_sa_register_client(&ipoib_sa_client); |
2539 | ||
1da177e4 LT |
2540 | ret = ib_register_client(&ipoib_client); |
2541 | if (ret) | |
c1a0b23b | 2542 | goto err_sa; |
1da177e4 | 2543 | |
9baa0b03 OG |
2544 | ret = ipoib_netlink_init(); |
2545 | if (ret) | |
2546 | goto err_client; | |
2547 | ||
771a5258 SR |
2548 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
2549 | register_netdevice_notifier(&ipoib_netdev_notifier); | |
2550 | #endif | |
1da177e4 LT |
2551 | return 0; |
2552 | ||
9baa0b03 OG |
2553 | err_client: |
2554 | ib_unregister_client(&ipoib_client); | |
2555 | ||
c1a0b23b MT |
2556 | err_sa: |
2557 | ib_sa_unregister_client(&ipoib_sa_client); | |
1da177e4 LT |
2558 | destroy_workqueue(ipoib_workqueue); |
2559 | ||
9adec1a8 RD |
2560 | err_fs: |
2561 | ipoib_unregister_debugfs(); | |
2562 | ||
1da177e4 LT |
2563 | return ret; |
2564 | } | |
2565 | ||
2566 | static void __exit ipoib_cleanup_module(void) | |
2567 | { | |
771a5258 SR |
2568 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
2569 | unregister_netdevice_notifier(&ipoib_netdev_notifier); | |
2570 | #endif | |
9baa0b03 | 2571 | ipoib_netlink_fini(); |
1da177e4 | 2572 | ib_unregister_client(&ipoib_client); |
c1a0b23b | 2573 | ib_sa_unregister_client(&ipoib_sa_client); |
9adec1a8 | 2574 | ipoib_unregister_debugfs(); |
1da177e4 LT |
2575 | destroy_workqueue(ipoib_workqueue); |
2576 | } | |
2577 | ||
2578 | module_init(ipoib_init_module); | |
2579 | module_exit(ipoib_cleanup_module); |