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perf intel-pt: Factor out intel_pt_8b_tsc()
[linux/fpc-iii.git] / drivers / infiniband / ulp / ipoib / ipoib_main.c
blob9b5e11d3fb85c58616af0c80abae7cb2b95953c9
1 /*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include "ipoib.h"
36
37 #include <linux/module.h>
38
39 #include <linux/init.h>
40 #include <linux/slab.h>
41 #include <linux/kernel.h>
42 #include <linux/vmalloc.h>
43
44 #include <linux/if_arp.h> /* For ARPHRD_xxx */
45
46 #include <linux/ip.h>
47 #include <linux/in.h>
48
49 #include <linux/jhash.h>
50 #include <net/arp.h>
51 #include <net/addrconf.h>
52 #include <linux/inetdevice.h>
53 #include <rdma/ib_cache.h>
54
55 #define DRV_VERSION "1.0.0"
56
57 const char ipoib_driver_version[] = DRV_VERSION;
58
59 MODULE_AUTHOR("Roland Dreier");
60 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
61 MODULE_LICENSE("Dual BSD/GPL");
62
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
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
78 struct ipoib_path_iter {
79 struct net_device *dev;
80 struct ipoib_path path;
81 };
82
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
91 struct ib_sa_client ipoib_sa_client;
92
93 static void ipoib_add_one(struct ib_device *device);
94 static void ipoib_remove_one(struct ib_device *device, void *client_data);
95 static void ipoib_neigh_reclaim(struct rcu_head *rp);
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);
100 static int ipoib_set_mac(struct net_device *dev, void *addr);
101 static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr,
102 int cmd);
103
104 static struct ib_client ipoib_client = {
105 .name = "ipoib",
106 .add = ipoib_add_one,
107 .remove = ipoib_remove_one,
108 .get_net_dev_by_params = ipoib_get_net_dev_by_params,
109 };
110
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
138 int ipoib_open(struct net_device *dev)
139 {
140 struct ipoib_dev_priv *priv = ipoib_priv(dev);
141
142 ipoib_dbg(priv, "bringing up interface\n");
143
144 netif_carrier_off(dev);
145
146 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
147
148 priv->sm_fullmember_sendonly_support = false;
149
150 if (ipoib_ib_dev_open(dev)) {
151 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
152 return 0;
153 goto err_disable;
154 }
155
156 ipoib_ib_dev_up(dev);
157
158 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
159 struct ipoib_dev_priv *cpriv;
160
161 /* Bring up any child interfaces too */
162 down_read(&priv->vlan_rwsem);
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, NULL);
171 }
172 up_read(&priv->vlan_rwsem);
173 }
174
175 netif_start_queue(dev);
176
177 return 0;
178
179 err_disable:
180 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
181
182 return -EINVAL;
183 }
184
185 static int ipoib_stop(struct net_device *dev)
186 {
187 struct ipoib_dev_priv *priv = ipoib_priv(dev);
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
195 ipoib_ib_dev_down(dev);
196 ipoib_ib_dev_stop(dev);
197
198 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
199 struct ipoib_dev_priv *cpriv;
200
201 /* Bring down any child interfaces too */
202 down_read(&priv->vlan_rwsem);
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, NULL);
211 }
212 up_read(&priv->vlan_rwsem);
213 }
214
215 return 0;
216 }
217
218 static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features)
219 {
220 struct ipoib_dev_priv *priv = ipoib_priv(dev);
221
222 if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags))
223 features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO);
224
225 return features;
226 }
227
228 static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
229 {
230 struct ipoib_dev_priv *priv = ipoib_priv(dev);
231 int ret = 0;
232
233 /* dev->mtu > 2K ==> connected mode */
234 if (ipoib_cm_admin_enabled(dev)) {
235 if (new_mtu > ipoib_cm_max_mtu(dev))
236 return -EINVAL;
237
238 if (new_mtu > priv->mcast_mtu)
239 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
240 priv->mcast_mtu);
241
242 dev->mtu = new_mtu;
243 return 0;
244 }
245
246 if (new_mtu < (ETH_MIN_MTU + IPOIB_ENCAP_LEN) ||
247 new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
248 return -EINVAL;
249
250 priv->admin_mtu = new_mtu;
251
252 if (priv->mcast_mtu < priv->admin_mtu)
253 ipoib_dbg(priv, "MTU must be smaller than the underlying "
254 "link layer MTU - 4 (%u)\n", priv->mcast_mtu);
255
256 new_mtu = min(priv->mcast_mtu, priv->admin_mtu);
257
258 if (priv->rn_ops->ndo_change_mtu) {
259 bool carrier_status = netif_carrier_ok(dev);
260
261 netif_carrier_off(dev);
262
263 /* notify lower level on the real mtu */
264 ret = priv->rn_ops->ndo_change_mtu(dev, new_mtu);
265
266 if (carrier_status)
267 netif_carrier_on(dev);
268 } else {
269 dev->mtu = new_mtu;
270 }
271
272 return ret;
273 }
274
275 static void ipoib_get_stats(struct net_device *dev,
276 struct rtnl_link_stats64 *stats)
277 {
278 struct ipoib_dev_priv *priv = ipoib_priv(dev);
279
280 if (priv->rn_ops->ndo_get_stats64)
281 priv->rn_ops->ndo_get_stats64(dev, stats);
282 else
283 netdev_stats_to_stats64(stats, &dev->stats);
284 }
285
286 /* Called with an RCU read lock taken */
287 static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr,
288 struct net_device *dev)
289 {
290 struct net *net = dev_net(dev);
291 struct in_device *in_dev;
292 struct sockaddr_in *addr_in = (struct sockaddr_in *)addr;
293 struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr;
294 __be32 ret_addr;
295
296 switch (addr->sa_family) {
297 case AF_INET:
298 in_dev = in_dev_get(dev);
299 if (!in_dev)
300 return false;
301
302 ret_addr = inet_confirm_addr(net, in_dev, 0,
303 addr_in->sin_addr.s_addr,
304 RT_SCOPE_HOST);
305 in_dev_put(in_dev);
306 if (ret_addr)
307 return true;
308
309 break;
310 case AF_INET6:
311 if (IS_ENABLED(CONFIG_IPV6) &&
312 ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1))
313 return true;
314
315 break;
316 }
317 return false;
318 }
319
320 /**
321 * Find the master net_device on top of the given net_device.
322 * @dev: base IPoIB net_device
323 *
324 * Returns the master net_device with a reference held, or the same net_device
325 * if no master exists.
326 */
327 static struct net_device *ipoib_get_master_net_dev(struct net_device *dev)
328 {
329 struct net_device *master;
330
331 rcu_read_lock();
332 master = netdev_master_upper_dev_get_rcu(dev);
333 if (master)
334 dev_hold(master);
335 rcu_read_unlock();
336
337 if (master)
338 return master;
339
340 dev_hold(dev);
341 return dev;
342 }
343
344 struct ipoib_walk_data {
345 const struct sockaddr *addr;
346 struct net_device *result;
347 };
348
349 static int ipoib_upper_walk(struct net_device *upper, void *_data)
350 {
351 struct ipoib_walk_data *data = _data;
352 int ret = 0;
353
354 if (ipoib_is_dev_match_addr_rcu(data->addr, upper)) {
355 dev_hold(upper);
356 data->result = upper;
357 ret = 1;
358 }
359
360 return ret;
361 }
362
363 /**
364 * Find a net_device matching the given address, which is an upper device of
365 * the given net_device.
366 * @addr: IP address to look for.
367 * @dev: base IPoIB net_device
368 *
369 * If found, returns the net_device with a reference held. Otherwise return
370 * NULL.
371 */
372 static struct net_device *ipoib_get_net_dev_match_addr(
373 const struct sockaddr *addr, struct net_device *dev)
374 {
375 struct ipoib_walk_data data = {
376 .addr = addr,
377 };
378
379 rcu_read_lock();
380 if (ipoib_is_dev_match_addr_rcu(addr, dev)) {
381 dev_hold(dev);
382 data.result = dev;
383 goto out;
384 }
385
386 netdev_walk_all_upper_dev_rcu(dev, ipoib_upper_walk, &data);
387 out:
388 rcu_read_unlock();
389 return data.result;
390 }
391
392 /* returns the number of IPoIB netdevs on top a given ipoib device matching a
393 * pkey_index and address, if one exists.
394 *
395 * @found_net_dev: contains a matching net_device if the return value >= 1,
396 * with a reference held. */
397 static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv,
398 const union ib_gid *gid,
399 u16 pkey_index,
400 const struct sockaddr *addr,
401 int nesting,
402 struct net_device **found_net_dev)
403 {
404 struct ipoib_dev_priv *child_priv;
405 struct net_device *net_dev = NULL;
406 int matches = 0;
407
408 if (priv->pkey_index == pkey_index &&
409 (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) {
410 if (!addr) {
411 net_dev = ipoib_get_master_net_dev(priv->dev);
412 } else {
413 /* Verify the net_device matches the IP address, as
414 * IPoIB child devices currently share a GID. */
415 net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev);
416 }
417 if (net_dev) {
418 if (!*found_net_dev)
419 *found_net_dev = net_dev;
420 else
421 dev_put(net_dev);
422 ++matches;
423 }
424 }
425
426 /* Check child interfaces */
427 down_read_nested(&priv->vlan_rwsem, nesting);
428 list_for_each_entry(child_priv, &priv->child_intfs, list) {
429 matches += ipoib_match_gid_pkey_addr(child_priv, gid,
430 pkey_index, addr,
431 nesting + 1,
432 found_net_dev);
433 if (matches > 1)
434 break;
435 }
436 up_read(&priv->vlan_rwsem);
437
438 return matches;
439 }
440
441 /* Returns the number of matching net_devs found (between 0 and 2). Also
442 * return the matching net_device in the @net_dev parameter, holding a
443 * reference to the net_device, if the number of matches >= 1 */
444 static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port,
445 u16 pkey_index,
446 const union ib_gid *gid,
447 const struct sockaddr *addr,
448 struct net_device **net_dev)
449 {
450 struct ipoib_dev_priv *priv;
451 int matches = 0;
452
453 *net_dev = NULL;
454
455 list_for_each_entry(priv, dev_list, list) {
456 if (priv->port != port)
457 continue;
458
459 matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index,
460 addr, 0, net_dev);
461 if (matches > 1)
462 break;
463 }
464
465 return matches;
466 }
467
468 static struct net_device *ipoib_get_net_dev_by_params(
469 struct ib_device *dev, u8 port, u16 pkey,
470 const union ib_gid *gid, const struct sockaddr *addr,
471 void *client_data)
472 {
473 struct net_device *net_dev;
474 struct list_head *dev_list = client_data;
475 u16 pkey_index;
476 int matches;
477 int ret;
478
479 if (!rdma_protocol_ib(dev, port))
480 return NULL;
481
482 ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index);
483 if (ret)
484 return NULL;
485
486 if (!dev_list)
487 return NULL;
488
489 /* See if we can find a unique device matching the L2 parameters */
490 matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
491 gid, NULL, &net_dev);
492
493 switch (matches) {
494 case 0:
495 return NULL;
496 case 1:
497 return net_dev;
498 }
499
500 dev_put(net_dev);
501
502 /* Couldn't find a unique device with L2 parameters only. Use L3
503 * address to uniquely match the net device */
504 matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
505 gid, addr, &net_dev);
506 switch (matches) {
507 case 0:
508 return NULL;
509 default:
510 dev_warn_ratelimited(&dev->dev,
511 "duplicate IP address detected\n");
512 /* Fall through */
513 case 1:
514 return net_dev;
515 }
516 }
517
518 int ipoib_set_mode(struct net_device *dev, const char *buf)
519 {
520 struct ipoib_dev_priv *priv = ipoib_priv(dev);
521
522 if ((test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
523 !strcmp(buf, "connected\n")) ||
524 (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
525 !strcmp(buf, "datagram\n"))) {
526 return 0;
527 }
528
529 /* flush paths if we switch modes so that connections are restarted */
530 if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) {
531 set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
532 ipoib_warn(priv, "enabling connected mode "
533 "will cause multicast packet drops\n");
534 netdev_update_features(dev);
535 dev_set_mtu(dev, ipoib_cm_max_mtu(dev));
536 rtnl_unlock();
537 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
538
539 ipoib_flush_paths(dev);
540 return (!rtnl_trylock()) ? -EBUSY : 0;
541 }
542
543 if (!strcmp(buf, "datagram\n")) {
544 clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
545 netdev_update_features(dev);
546 dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
547 rtnl_unlock();
548 ipoib_flush_paths(dev);
549 return (!rtnl_trylock()) ? -EBUSY : 0;
550 }
551
552 return -EINVAL;
553 }
554
555 struct ipoib_path *__path_find(struct net_device *dev, void *gid)
556 {
557 struct ipoib_dev_priv *priv = ipoib_priv(dev);
558 struct rb_node *n = priv->path_tree.rb_node;
559 struct ipoib_path *path;
560 int ret;
561
562 while (n) {
563 path = rb_entry(n, struct ipoib_path, rb_node);
564
565 ret = memcmp(gid, path->pathrec.dgid.raw,
566 sizeof (union ib_gid));
567
568 if (ret < 0)
569 n = n->rb_left;
570 else if (ret > 0)
571 n = n->rb_right;
572 else
573 return path;
574 }
575
576 return NULL;
577 }
578
579 static int __path_add(struct net_device *dev, struct ipoib_path *path)
580 {
581 struct ipoib_dev_priv *priv = ipoib_priv(dev);
582 struct rb_node **n = &priv->path_tree.rb_node;
583 struct rb_node *pn = NULL;
584 struct ipoib_path *tpath;
585 int ret;
586
587 while (*n) {
588 pn = *n;
589 tpath = rb_entry(pn, struct ipoib_path, rb_node);
590
591 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
592 sizeof (union ib_gid));
593 if (ret < 0)
594 n = &pn->rb_left;
595 else if (ret > 0)
596 n = &pn->rb_right;
597 else
598 return -EEXIST;
599 }
600
601 rb_link_node(&path->rb_node, pn, n);
602 rb_insert_color(&path->rb_node, &priv->path_tree);
603
604 list_add_tail(&path->list, &priv->path_list);
605
606 return 0;
607 }
608
609 static void path_free(struct net_device *dev, struct ipoib_path *path)
610 {
611 struct sk_buff *skb;
612
613 while ((skb = __skb_dequeue(&path->queue)))
614 dev_kfree_skb_irq(skb);
615
616 ipoib_dbg(ipoib_priv(dev), "%s\n", __func__);
617
618 /* remove all neigh connected to this path */
619 ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
620
621 if (path->ah)
622 ipoib_put_ah(path->ah);
623
624 kfree(path);
625 }
626
627 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
628
629 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
630 {
631 struct ipoib_path_iter *iter;
632
633 iter = kmalloc(sizeof(*iter), GFP_KERNEL);
634 if (!iter)
635 return NULL;
636
637 iter->dev = dev;
638 memset(iter->path.pathrec.dgid.raw, 0, 16);
639
640 if (ipoib_path_iter_next(iter)) {
641 kfree(iter);
642 return NULL;
643 }
644
645 return iter;
646 }
647
648 int ipoib_path_iter_next(struct ipoib_path_iter *iter)
649 {
650 struct ipoib_dev_priv *priv = ipoib_priv(iter->dev);
651 struct rb_node *n;
652 struct ipoib_path *path;
653 int ret = 1;
654
655 spin_lock_irq(&priv->lock);
656
657 n = rb_first(&priv->path_tree);
658
659 while (n) {
660 path = rb_entry(n, struct ipoib_path, rb_node);
661
662 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
663 sizeof (union ib_gid)) < 0) {
664 iter->path = *path;
665 ret = 0;
666 break;
667 }
668
669 n = rb_next(n);
670 }
671
672 spin_unlock_irq(&priv->lock);
673
674 return ret;
675 }
676
677 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
678 struct ipoib_path *path)
679 {
680 *path = iter->path;
681 }
682
683 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
684
685 void ipoib_mark_paths_invalid(struct net_device *dev)
686 {
687 struct ipoib_dev_priv *priv = ipoib_priv(dev);
688 struct ipoib_path *path, *tp;
689
690 spin_lock_irq(&priv->lock);
691
692 list_for_each_entry_safe(path, tp, &priv->path_list, list) {
693 ipoib_dbg(priv, "mark path LID 0x%08x GID %pI6 invalid\n",
694 be32_to_cpu(sa_path_get_dlid(&path->pathrec)),
695 path->pathrec.dgid.raw);
696 if (path->ah)
697 path->ah->valid = 0;
698 }
699
700 spin_unlock_irq(&priv->lock);
701 }
702
703 static void push_pseudo_header(struct sk_buff *skb, const char *daddr)
704 {
705 struct ipoib_pseudo_header *phdr;
706
707 phdr = skb_push(skb, sizeof(*phdr));
708 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
709 }
710
711 void ipoib_flush_paths(struct net_device *dev)
712 {
713 struct ipoib_dev_priv *priv = ipoib_priv(dev);
714 struct ipoib_path *path, *tp;
715 LIST_HEAD(remove_list);
716 unsigned long flags;
717
718 netif_tx_lock_bh(dev);
719 spin_lock_irqsave(&priv->lock, flags);
720
721 list_splice_init(&priv->path_list, &remove_list);
722
723 list_for_each_entry(path, &remove_list, list)
724 rb_erase(&path->rb_node, &priv->path_tree);
725
726 list_for_each_entry_safe(path, tp, &remove_list, list) {
727 if (path->query)
728 ib_sa_cancel_query(path->query_id, path->query);
729 spin_unlock_irqrestore(&priv->lock, flags);
730 netif_tx_unlock_bh(dev);
731 wait_for_completion(&path->done);
732 path_free(dev, path);
733 netif_tx_lock_bh(dev);
734 spin_lock_irqsave(&priv->lock, flags);
735 }
736
737 spin_unlock_irqrestore(&priv->lock, flags);
738 netif_tx_unlock_bh(dev);
739 }
740
741 static void path_rec_completion(int status,
742 struct sa_path_rec *pathrec,
743 void *path_ptr)
744 {
745 struct ipoib_path *path = path_ptr;
746 struct net_device *dev = path->dev;
747 struct ipoib_dev_priv *priv = ipoib_priv(dev);
748 struct ipoib_ah *ah = NULL;
749 struct ipoib_ah *old_ah = NULL;
750 struct ipoib_neigh *neigh, *tn;
751 struct sk_buff_head skqueue;
752 struct sk_buff *skb;
753 unsigned long flags;
754
755 if (!status)
756 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n",
757 be32_to_cpu(sa_path_get_dlid(pathrec)),
758 pathrec->dgid.raw);
759 else
760 ipoib_dbg(priv, "PathRec status %d for GID %pI6\n",
761 status, path->pathrec.dgid.raw);
762
763 skb_queue_head_init(&skqueue);
764
765 if (!status) {
766 struct rdma_ah_attr av;
767
768 if (!ib_init_ah_attr_from_path(priv->ca, priv->port,
769 pathrec, &av, NULL)) {
770 ah = ipoib_create_ah(dev, priv->pd, &av);
771 rdma_destroy_ah_attr(&av);
772 }
773 }
774
775 spin_lock_irqsave(&priv->lock, flags);
776
777 if (!IS_ERR_OR_NULL(ah)) {
778 /*
779 * pathrec.dgid is used as the database key from the LLADDR,
780 * it must remain unchanged even if the SA returns a different
781 * GID to use in the AH.
782 */
783 if (memcmp(pathrec->dgid.raw, path->pathrec.dgid.raw,
784 sizeof(union ib_gid))) {
785 ipoib_dbg(
786 priv,
787 "%s got PathRec for gid %pI6 while asked for %pI6\n",
788 dev->name, pathrec->dgid.raw,
789 path->pathrec.dgid.raw);
790 memcpy(pathrec->dgid.raw, path->pathrec.dgid.raw,
791 sizeof(union ib_gid));
792 }
793
794 path->pathrec = *pathrec;
795
796 old_ah = path->ah;
797 path->ah = ah;
798
799 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
800 ah, be32_to_cpu(sa_path_get_dlid(pathrec)),
801 pathrec->sl);
802
803 while ((skb = __skb_dequeue(&path->queue)))
804 __skb_queue_tail(&skqueue, skb);
805
806 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
807 if (neigh->ah) {
808 WARN_ON(neigh->ah != old_ah);
809 /*
810 * Dropping the ah reference inside
811 * priv->lock is safe here, because we
812 * will hold one more reference from
813 * the original value of path->ah (ie
814 * old_ah).
815 */
816 ipoib_put_ah(neigh->ah);
817 }
818 kref_get(&path->ah->ref);
819 neigh->ah = path->ah;
820
821 if (ipoib_cm_enabled(dev, neigh->daddr)) {
822 if (!ipoib_cm_get(neigh))
823 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
824 path,
825 neigh));
826 if (!ipoib_cm_get(neigh)) {
827 ipoib_neigh_free(neigh);
828 continue;
829 }
830 }
831
832 while ((skb = __skb_dequeue(&neigh->queue)))
833 __skb_queue_tail(&skqueue, skb);
834 }
835 path->ah->valid = 1;
836 }
837
838 path->query = NULL;
839 complete(&path->done);
840
841 spin_unlock_irqrestore(&priv->lock, flags);
842
843 if (IS_ERR_OR_NULL(ah))
844 ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
845
846 if (old_ah)
847 ipoib_put_ah(old_ah);
848
849 while ((skb = __skb_dequeue(&skqueue))) {
850 int ret;
851 skb->dev = dev;
852 ret = dev_queue_xmit(skb);
853 if (ret)
854 ipoib_warn(priv, "%s: dev_queue_xmit failed to re-queue packet, ret:%d\n",
855 __func__, ret);
856 }
857 }
858
859 static void init_path_rec(struct ipoib_dev_priv *priv, struct ipoib_path *path,
860 void *gid)
861 {
862 path->dev = priv->dev;
863
864 if (rdma_cap_opa_ah(priv->ca, priv->port))
865 path->pathrec.rec_type = SA_PATH_REC_TYPE_OPA;
866 else
867 path->pathrec.rec_type = SA_PATH_REC_TYPE_IB;
868
869 memcpy(path->pathrec.dgid.raw, gid, sizeof(union ib_gid));
870 path->pathrec.sgid = priv->local_gid;
871 path->pathrec.pkey = cpu_to_be16(priv->pkey);
872 path->pathrec.numb_path = 1;
873 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
874 }
875
876 static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
877 {
878 struct ipoib_dev_priv *priv = ipoib_priv(dev);
879 struct ipoib_path *path;
880
881 if (!priv->broadcast)
882 return NULL;
883
884 path = kzalloc(sizeof(*path), GFP_ATOMIC);
885 if (!path)
886 return NULL;
887
888 skb_queue_head_init(&path->queue);
889
890 INIT_LIST_HEAD(&path->neigh_list);
891
892 init_path_rec(priv, path, gid);
893
894 return path;
895 }
896
897 static int path_rec_start(struct net_device *dev,
898 struct ipoib_path *path)
899 {
900 struct ipoib_dev_priv *priv = ipoib_priv(dev);
901
902 ipoib_dbg(priv, "Start path record lookup for %pI6\n",
903 path->pathrec.dgid.raw);
904
905 init_completion(&path->done);
906
907 path->query_id =
908 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
909 &path->pathrec,
910 IB_SA_PATH_REC_DGID |
911 IB_SA_PATH_REC_SGID |
912 IB_SA_PATH_REC_NUMB_PATH |
913 IB_SA_PATH_REC_TRAFFIC_CLASS |
914 IB_SA_PATH_REC_PKEY,
915 1000, GFP_ATOMIC,
916 path_rec_completion,
917 path, &path->query);
918 if (path->query_id < 0) {
919 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
920 path->query = NULL;
921 complete(&path->done);
922 return path->query_id;
923 }
924
925 return 0;
926 }
927
928 static void neigh_refresh_path(struct ipoib_neigh *neigh, u8 *daddr,
929 struct net_device *dev)
930 {
931 struct ipoib_dev_priv *priv = ipoib_priv(dev);
932 struct ipoib_path *path;
933 unsigned long flags;
934
935 spin_lock_irqsave(&priv->lock, flags);
936
937 path = __path_find(dev, daddr + 4);
938 if (!path)
939 goto out;
940 if (!path->query)
941 path_rec_start(dev, path);
942 out:
943 spin_unlock_irqrestore(&priv->lock, flags);
944 }
945
946 static struct ipoib_neigh *neigh_add_path(struct sk_buff *skb, u8 *daddr,
947 struct net_device *dev)
948 {
949 struct ipoib_dev_priv *priv = ipoib_priv(dev);
950 struct rdma_netdev *rn = netdev_priv(dev);
951 struct ipoib_path *path;
952 struct ipoib_neigh *neigh;
953 unsigned long flags;
954
955 spin_lock_irqsave(&priv->lock, flags);
956 neigh = ipoib_neigh_alloc(daddr, dev);
957 if (!neigh) {
958 spin_unlock_irqrestore(&priv->lock, flags);
959 ++dev->stats.tx_dropped;
960 dev_kfree_skb_any(skb);
961 return NULL;
962 }
963
964 /* To avoid race condition, make sure that the
965 * neigh will be added only once.
966 */
967 if (unlikely(!list_empty(&neigh->list))) {
968 spin_unlock_irqrestore(&priv->lock, flags);
969 return neigh;
970 }
971
972 path = __path_find(dev, daddr + 4);
973 if (!path) {
974 path = path_rec_create(dev, daddr + 4);
975 if (!path)
976 goto err_path;
977
978 __path_add(dev, path);
979 }
980
981 list_add_tail(&neigh->list, &path->neigh_list);
982
983 if (path->ah && path->ah->valid) {
984 kref_get(&path->ah->ref);
985 neigh->ah = path->ah;
986
987 if (ipoib_cm_enabled(dev, neigh->daddr)) {
988 if (!ipoib_cm_get(neigh))
989 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
990 if (!ipoib_cm_get(neigh)) {
991 ipoib_neigh_free(neigh);
992 goto err_drop;
993 }
994 if (skb_queue_len(&neigh->queue) <
995 IPOIB_MAX_PATH_REC_QUEUE) {
996 push_pseudo_header(skb, neigh->daddr);
997 __skb_queue_tail(&neigh->queue, skb);
998 } else {
999 ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
1000 skb_queue_len(&neigh->queue));
1001 goto err_drop;
1002 }
1003 } else {
1004 spin_unlock_irqrestore(&priv->lock, flags);
1005 path->ah->last_send = rn->send(dev, skb, path->ah->ah,
1006 IPOIB_QPN(daddr));
1007 ipoib_neigh_put(neigh);
1008 return NULL;
1009 }
1010 } else {
1011 neigh->ah = NULL;
1012
1013 if (!path->query && path_rec_start(dev, path))
1014 goto err_path;
1015 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
1016 push_pseudo_header(skb, neigh->daddr);
1017 __skb_queue_tail(&neigh->queue, skb);
1018 } else {
1019 goto err_drop;
1020 }
1021 }
1022
1023 spin_unlock_irqrestore(&priv->lock, flags);
1024 ipoib_neigh_put(neigh);
1025 return NULL;
1026
1027 err_path:
1028 ipoib_neigh_free(neigh);
1029 err_drop:
1030 ++dev->stats.tx_dropped;
1031 dev_kfree_skb_any(skb);
1032
1033 spin_unlock_irqrestore(&priv->lock, flags);
1034 ipoib_neigh_put(neigh);
1035
1036 return NULL;
1037 }
1038
1039 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
1040 struct ipoib_pseudo_header *phdr)
1041 {
1042 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1043 struct rdma_netdev *rn = netdev_priv(dev);
1044 struct ipoib_path *path;
1045 unsigned long flags;
1046
1047 spin_lock_irqsave(&priv->lock, flags);
1048
1049 /* no broadcast means that all paths are (going to be) not valid */
1050 if (!priv->broadcast)
1051 goto drop_and_unlock;
1052
1053 path = __path_find(dev, phdr->hwaddr + 4);
1054 if (!path || !path->ah || !path->ah->valid) {
1055 if (!path) {
1056 path = path_rec_create(dev, phdr->hwaddr + 4);
1057 if (!path)
1058 goto drop_and_unlock;
1059 __path_add(dev, path);
1060 } else {
1061 /*
1062 * make sure there are no changes in the existing
1063 * path record
1064 */
1065 init_path_rec(priv, path, phdr->hwaddr + 4);
1066 }
1067 if (!path->query && path_rec_start(dev, path)) {
1068 goto drop_and_unlock;
1069 }
1070
1071 if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
1072 push_pseudo_header(skb, phdr->hwaddr);
1073 __skb_queue_tail(&path->queue, skb);
1074 goto unlock;
1075 } else {
1076 goto drop_and_unlock;
1077 }
1078 }
1079
1080 spin_unlock_irqrestore(&priv->lock, flags);
1081 ipoib_dbg(priv, "Send unicast ARP to %08x\n",
1082 be32_to_cpu(sa_path_get_dlid(&path->pathrec)));
1083 path->ah->last_send = rn->send(dev, skb, path->ah->ah,
1084 IPOIB_QPN(phdr->hwaddr));
1085 return;
1086
1087 drop_and_unlock:
1088 ++dev->stats.tx_dropped;
1089 dev_kfree_skb_any(skb);
1090 unlock:
1091 spin_unlock_irqrestore(&priv->lock, flags);
1092 }
1093
1094 static netdev_tx_t ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
1095 {
1096 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1097 struct rdma_netdev *rn = netdev_priv(dev);
1098 struct ipoib_neigh *neigh;
1099 struct ipoib_pseudo_header *phdr;
1100 struct ipoib_header *header;
1101 unsigned long flags;
1102
1103 phdr = (struct ipoib_pseudo_header *) skb->data;
1104 skb_pull(skb, sizeof(*phdr));
1105 header = (struct ipoib_header *) skb->data;
1106
1107 if (unlikely(phdr->hwaddr[4] == 0xff)) {
1108 /* multicast, arrange "if" according to probability */
1109 if ((header->proto != htons(ETH_P_IP)) &&
1110 (header->proto != htons(ETH_P_IPV6)) &&
1111 (header->proto != htons(ETH_P_ARP)) &&
1112 (header->proto != htons(ETH_P_RARP)) &&
1113 (header->proto != htons(ETH_P_TIPC))) {
1114 /* ethertype not supported by IPoIB */
1115 ++dev->stats.tx_dropped;
1116 dev_kfree_skb_any(skb);
1117 return NETDEV_TX_OK;
1118 }
1119 /* Add in the P_Key for multicast*/
1120 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
1121 phdr->hwaddr[9] = priv->pkey & 0xff;
1122
1123 neigh = ipoib_neigh_get(dev, phdr->hwaddr);
1124 if (likely(neigh))
1125 goto send_using_neigh;
1126 ipoib_mcast_send(dev, phdr->hwaddr, skb);
1127 return NETDEV_TX_OK;
1128 }
1129
1130 /* unicast, arrange "switch" according to probability */
1131 switch (header->proto) {
1132 case htons(ETH_P_IP):
1133 case htons(ETH_P_IPV6):
1134 case htons(ETH_P_TIPC):
1135 neigh = ipoib_neigh_get(dev, phdr->hwaddr);
1136 if (unlikely(!neigh)) {
1137 neigh = neigh_add_path(skb, phdr->hwaddr, dev);
1138 if (likely(!neigh))
1139 return NETDEV_TX_OK;
1140 }
1141 break;
1142 case htons(ETH_P_ARP):
1143 case htons(ETH_P_RARP):
1144 /* for unicast ARP and RARP should always perform path find */
1145 unicast_arp_send(skb, dev, phdr);
1146 return NETDEV_TX_OK;
1147 default:
1148 /* ethertype not supported by IPoIB */
1149 ++dev->stats.tx_dropped;
1150 dev_kfree_skb_any(skb);
1151 return NETDEV_TX_OK;
1152 }
1153
1154 send_using_neigh:
1155 /* note we now hold a ref to neigh */
1156 if (ipoib_cm_get(neigh)) {
1157 if (ipoib_cm_up(neigh)) {
1158 ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
1159 goto unref;
1160 }
1161 } else if (neigh->ah && neigh->ah->valid) {
1162 neigh->ah->last_send = rn->send(dev, skb, neigh->ah->ah,
1163 IPOIB_QPN(phdr->hwaddr));
1164 goto unref;
1165 } else if (neigh->ah) {
1166 neigh_refresh_path(neigh, phdr->hwaddr, dev);
1167 }
1168
1169 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
1170 push_pseudo_header(skb, phdr->hwaddr);
1171 spin_lock_irqsave(&priv->lock, flags);
1172 __skb_queue_tail(&neigh->queue, skb);
1173 spin_unlock_irqrestore(&priv->lock, flags);
1174 } else {
1175 ++dev->stats.tx_dropped;
1176 dev_kfree_skb_any(skb);
1177 }
1178
1179 unref:
1180 ipoib_neigh_put(neigh);
1181
1182 return NETDEV_TX_OK;
1183 }
1184
1185 static void ipoib_timeout(struct net_device *dev)
1186 {
1187 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1188
1189 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
1190 jiffies_to_msecs(jiffies - dev_trans_start(dev)));
1191 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
1192 netif_queue_stopped(dev),
1193 priv->tx_head, priv->tx_tail);
1194 /* XXX reset QP, etc. */
1195 }
1196
1197 static int ipoib_hard_header(struct sk_buff *skb,
1198 struct net_device *dev,
1199 unsigned short type,
1200 const void *daddr,
1201 const void *saddr,
1202 unsigned int len)
1203 {
1204 struct ipoib_header *header;
1205
1206 header = skb_push(skb, sizeof(*header));
1207
1208 header->proto = htons(type);
1209 header->reserved = 0;
1210
1211 /*
1212 * we don't rely on dst_entry structure, always stuff the
1213 * destination address into skb hard header so we can figure out where
1214 * to send the packet later.
1215 */
1216 push_pseudo_header(skb, daddr);
1217
1218 return IPOIB_HARD_LEN;
1219 }
1220
1221 static void ipoib_set_mcast_list(struct net_device *dev)
1222 {
1223 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1224
1225 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
1226 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
1227 return;
1228 }
1229
1230 queue_work(priv->wq, &priv->restart_task);
1231 }
1232
1233 static int ipoib_get_iflink(const struct net_device *dev)
1234 {
1235 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1236
1237 /* parent interface */
1238 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
1239 return dev->ifindex;
1240
1241 /* child/vlan interface */
1242 return priv->parent->ifindex;
1243 }
1244
1245 static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr)
1246 {
1247 /*
1248 * Use only the address parts that contributes to spreading
1249 * The subnet prefix is not used as one can not connect to
1250 * same remote port (GUID) using the same remote QPN via two
1251 * different subnets.
1252 */
1253 /* qpn octets[1:4) & port GUID octets[12:20) */
1254 u32 *d32 = (u32 *) daddr;
1255 u32 hv;
1256
1257 hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0);
1258 return hv & htbl->mask;
1259 }
1260
1261 struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr)
1262 {
1263 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1264 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1265 struct ipoib_neigh_hash *htbl;
1266 struct ipoib_neigh *neigh = NULL;
1267 u32 hash_val;
1268
1269 rcu_read_lock_bh();
1270
1271 htbl = rcu_dereference_bh(ntbl->htbl);
1272
1273 if (!htbl)
1274 goto out_unlock;
1275
1276 hash_val = ipoib_addr_hash(htbl, daddr);
1277 for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]);
1278 neigh != NULL;
1279 neigh = rcu_dereference_bh(neigh->hnext)) {
1280 if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
1281 /* found, take one ref on behalf of the caller */
1282 if (!atomic_inc_not_zero(&neigh->refcnt)) {
1283 /* deleted */
1284 neigh = NULL;
1285 goto out_unlock;
1286 }
1287
1288 if (likely(skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE))
1289 neigh->alive = jiffies;
1290 goto out_unlock;
1291 }
1292 }
1293
1294 out_unlock:
1295 rcu_read_unlock_bh();
1296 return neigh;
1297 }
1298
1299 static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
1300 {
1301 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1302 struct ipoib_neigh_hash *htbl;
1303 unsigned long neigh_obsolete;
1304 unsigned long dt;
1305 unsigned long flags;
1306 int i;
1307 LIST_HEAD(remove_list);
1308
1309 spin_lock_irqsave(&priv->lock, flags);
1310
1311 htbl = rcu_dereference_protected(ntbl->htbl,
1312 lockdep_is_held(&priv->lock));
1313
1314 if (!htbl)
1315 goto out_unlock;
1316
1317 /* neigh is obsolete if it was idle for two GC periods */
1318 dt = 2 * arp_tbl.gc_interval;
1319 neigh_obsolete = jiffies - dt;
1320
1321 for (i = 0; i < htbl->size; i++) {
1322 struct ipoib_neigh *neigh;
1323 struct ipoib_neigh __rcu **np = &htbl->buckets[i];
1324
1325 while ((neigh = rcu_dereference_protected(*np,
1326 lockdep_is_held(&priv->lock))) != NULL) {
1327 /* was the neigh idle for two GC periods */
1328 if (time_after(neigh_obsolete, neigh->alive)) {
1329
1330 ipoib_check_and_add_mcast_sendonly(priv, neigh->daddr + 4, &remove_list);
1331
1332 rcu_assign_pointer(*np,
1333 rcu_dereference_protected(neigh->hnext,
1334 lockdep_is_held(&priv->lock)));
1335 /* remove from path/mc list */
1336 list_del_init(&neigh->list);
1337 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1338 } else {
1339 np = &neigh->hnext;
1340 }
1341
1342 }
1343 }
1344
1345 out_unlock:
1346 spin_unlock_irqrestore(&priv->lock, flags);
1347 ipoib_mcast_remove_list(&remove_list);
1348 }
1349
1350 static void ipoib_reap_neigh(struct work_struct *work)
1351 {
1352 struct ipoib_dev_priv *priv =
1353 container_of(work, struct ipoib_dev_priv, neigh_reap_task.work);
1354
1355 __ipoib_reap_neigh(priv);
1356
1357 queue_delayed_work(priv->wq, &priv->neigh_reap_task,
1358 arp_tbl.gc_interval);
1359 }
1360
1361
1362 static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr,
1363 struct net_device *dev)
1364 {
1365 struct ipoib_neigh *neigh;
1366
1367 neigh = kzalloc(sizeof(*neigh), GFP_ATOMIC);
1368 if (!neigh)
1369 return NULL;
1370
1371 neigh->dev = dev;
1372 memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr));
1373 skb_queue_head_init(&neigh->queue);
1374 INIT_LIST_HEAD(&neigh->list);
1375 ipoib_cm_set(neigh, NULL);
1376 /* one ref on behalf of the caller */
1377 atomic_set(&neigh->refcnt, 1);
1378
1379 return neigh;
1380 }
1381
1382 struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
1383 struct net_device *dev)
1384 {
1385 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1386 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1387 struct ipoib_neigh_hash *htbl;
1388 struct ipoib_neigh *neigh;
1389 u32 hash_val;
1390
1391 htbl = rcu_dereference_protected(ntbl->htbl,
1392 lockdep_is_held(&priv->lock));
1393 if (!htbl) {
1394 neigh = NULL;
1395 goto out_unlock;
1396 }
1397
1398 /* need to add a new neigh, but maybe some other thread succeeded?
1399 * recalc hash, maybe hash resize took place so we do a search
1400 */
1401 hash_val = ipoib_addr_hash(htbl, daddr);
1402 for (neigh = rcu_dereference_protected(htbl->buckets[hash_val],
1403 lockdep_is_held(&priv->lock));
1404 neigh != NULL;
1405 neigh = rcu_dereference_protected(neigh->hnext,
1406 lockdep_is_held(&priv->lock))) {
1407 if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
1408 /* found, take one ref on behalf of the caller */
1409 if (!atomic_inc_not_zero(&neigh->refcnt)) {
1410 /* deleted */
1411 neigh = NULL;
1412 break;
1413 }
1414 neigh->alive = jiffies;
1415 goto out_unlock;
1416 }
1417 }
1418
1419 neigh = ipoib_neigh_ctor(daddr, dev);
1420 if (!neigh)
1421 goto out_unlock;
1422
1423 /* one ref on behalf of the hash table */
1424 atomic_inc(&neigh->refcnt);
1425 neigh->alive = jiffies;
1426 /* put in hash */
1427 rcu_assign_pointer(neigh->hnext,
1428 rcu_dereference_protected(htbl->buckets[hash_val],
1429 lockdep_is_held(&priv->lock)));
1430 rcu_assign_pointer(htbl->buckets[hash_val], neigh);
1431 atomic_inc(&ntbl->entries);
1432
1433 out_unlock:
1434
1435 return neigh;
1436 }
1437
1438 void ipoib_neigh_dtor(struct ipoib_neigh *neigh)
1439 {
1440 /* neigh reference count was dropprd to zero */
1441 struct net_device *dev = neigh->dev;
1442 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1443 struct sk_buff *skb;
1444 if (neigh->ah)
1445 ipoib_put_ah(neigh->ah);
1446 while ((skb = __skb_dequeue(&neigh->queue))) {
1447 ++dev->stats.tx_dropped;
1448 dev_kfree_skb_any(skb);
1449 }
1450 if (ipoib_cm_get(neigh))
1451 ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
1452 ipoib_dbg(ipoib_priv(dev),
1453 "neigh free for %06x %pI6\n",
1454 IPOIB_QPN(neigh->daddr),
1455 neigh->daddr + 4);
1456 kfree(neigh);
1457 if (atomic_dec_and_test(&priv->ntbl.entries)) {
1458 if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags))
1459 complete(&priv->ntbl.flushed);
1460 }
1461 }
1462
1463 static void ipoib_neigh_reclaim(struct rcu_head *rp)
1464 {
1465 /* Called as a result of removal from hash table */
1466 struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu);
1467 /* note TX context may hold another ref */
1468 ipoib_neigh_put(neigh);
1469 }
1470
1471 void ipoib_neigh_free(struct ipoib_neigh *neigh)
1472 {
1473 struct net_device *dev = neigh->dev;
1474 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1475 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1476 struct ipoib_neigh_hash *htbl;
1477 struct ipoib_neigh __rcu **np;
1478 struct ipoib_neigh *n;
1479 u32 hash_val;
1480
1481 htbl = rcu_dereference_protected(ntbl->htbl,
1482 lockdep_is_held(&priv->lock));
1483 if (!htbl)
1484 return;
1485
1486 hash_val = ipoib_addr_hash(htbl, neigh->daddr);
1487 np = &htbl->buckets[hash_val];
1488 for (n = rcu_dereference_protected(*np,
1489 lockdep_is_held(&priv->lock));
1490 n != NULL;
1491 n = rcu_dereference_protected(*np,
1492 lockdep_is_held(&priv->lock))) {
1493 if (n == neigh) {
1494 /* found */
1495 rcu_assign_pointer(*np,
1496 rcu_dereference_protected(neigh->hnext,
1497 lockdep_is_held(&priv->lock)));
1498 /* remove from parent list */
1499 list_del_init(&neigh->list);
1500 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1501 return;
1502 } else {
1503 np = &n->hnext;
1504 }
1505 }
1506 }
1507
1508 static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv)
1509 {
1510 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1511 struct ipoib_neigh_hash *htbl;
1512 struct ipoib_neigh __rcu **buckets;
1513 u32 size;
1514
1515 clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
1516 ntbl->htbl = NULL;
1517 htbl = kzalloc(sizeof(*htbl), GFP_KERNEL);
1518 if (!htbl)
1519 return -ENOMEM;
1520 size = roundup_pow_of_two(arp_tbl.gc_thresh3);
1521 buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL);
1522 if (!buckets) {
1523 kfree(htbl);
1524 return -ENOMEM;
1525 }
1526 htbl->size = size;
1527 htbl->mask = (size - 1);
1528 htbl->buckets = buckets;
1529 RCU_INIT_POINTER(ntbl->htbl, htbl);
1530 htbl->ntbl = ntbl;
1531 atomic_set(&ntbl->entries, 0);
1532
1533 /* start garbage collection */
1534 queue_delayed_work(priv->wq, &priv->neigh_reap_task,
1535 arp_tbl.gc_interval);
1536
1537 return 0;
1538 }
1539
1540 static void neigh_hash_free_rcu(struct rcu_head *head)
1541 {
1542 struct ipoib_neigh_hash *htbl = container_of(head,
1543 struct ipoib_neigh_hash,
1544 rcu);
1545 struct ipoib_neigh __rcu **buckets = htbl->buckets;
1546 struct ipoib_neigh_table *ntbl = htbl->ntbl;
1547
1548 kvfree(buckets);
1549 kfree(htbl);
1550 complete(&ntbl->deleted);
1551 }
1552
1553 void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid)
1554 {
1555 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1556 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1557 struct ipoib_neigh_hash *htbl;
1558 unsigned long flags;
1559 int i;
1560
1561 /* remove all neigh connected to a given path or mcast */
1562 spin_lock_irqsave(&priv->lock, flags);
1563
1564 htbl = rcu_dereference_protected(ntbl->htbl,
1565 lockdep_is_held(&priv->lock));
1566
1567 if (!htbl)
1568 goto out_unlock;
1569
1570 for (i = 0; i < htbl->size; i++) {
1571 struct ipoib_neigh *neigh;
1572 struct ipoib_neigh __rcu **np = &htbl->buckets[i];
1573
1574 while ((neigh = rcu_dereference_protected(*np,
1575 lockdep_is_held(&priv->lock))) != NULL) {
1576 /* delete neighs belong to this parent */
1577 if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) {
1578 rcu_assign_pointer(*np,
1579 rcu_dereference_protected(neigh->hnext,
1580 lockdep_is_held(&priv->lock)));
1581 /* remove from parent list */
1582 list_del_init(&neigh->list);
1583 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1584 } else {
1585 np = &neigh->hnext;
1586 }
1587
1588 }
1589 }
1590 out_unlock:
1591 spin_unlock_irqrestore(&priv->lock, flags);
1592 }
1593
1594 static void ipoib_flush_neighs(struct ipoib_dev_priv *priv)
1595 {
1596 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1597 struct ipoib_neigh_hash *htbl;
1598 unsigned long flags;
1599 int i, wait_flushed = 0;
1600
1601 init_completion(&priv->ntbl.flushed);
1602 set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
1603
1604 spin_lock_irqsave(&priv->lock, flags);
1605
1606 htbl = rcu_dereference_protected(ntbl->htbl,
1607 lockdep_is_held(&priv->lock));
1608 if (!htbl)
1609 goto out_unlock;
1610
1611 wait_flushed = atomic_read(&priv->ntbl.entries);
1612 if (!wait_flushed)
1613 goto free_htbl;
1614
1615 for (i = 0; i < htbl->size; i++) {
1616 struct ipoib_neigh *neigh;
1617 struct ipoib_neigh __rcu **np = &htbl->buckets[i];
1618
1619 while ((neigh = rcu_dereference_protected(*np,
1620 lockdep_is_held(&priv->lock))) != NULL) {
1621 rcu_assign_pointer(*np,
1622 rcu_dereference_protected(neigh->hnext,
1623 lockdep_is_held(&priv->lock)));
1624 /* remove from path/mc list */
1625 list_del_init(&neigh->list);
1626 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1627 }
1628 }
1629
1630 free_htbl:
1631 rcu_assign_pointer(ntbl->htbl, NULL);
1632 call_rcu(&htbl->rcu, neigh_hash_free_rcu);
1633
1634 out_unlock:
1635 spin_unlock_irqrestore(&priv->lock, flags);
1636 if (wait_flushed)
1637 wait_for_completion(&priv->ntbl.flushed);
1638 }
1639
1640 static void ipoib_neigh_hash_uninit(struct net_device *dev)
1641 {
1642 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1643
1644 ipoib_dbg(priv, "%s\n", __func__);
1645 init_completion(&priv->ntbl.deleted);
1646
1647 cancel_delayed_work_sync(&priv->neigh_reap_task);
1648
1649 ipoib_flush_neighs(priv);
1650
1651 wait_for_completion(&priv->ntbl.deleted);
1652 }
1653
1654 static void ipoib_napi_add(struct net_device *dev)
1655 {
1656 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1657
1658 netif_napi_add(dev, &priv->recv_napi, ipoib_rx_poll, IPOIB_NUM_WC);
1659 netif_napi_add(dev, &priv->send_napi, ipoib_tx_poll, MAX_SEND_CQE);
1660 }
1661
1662 static void ipoib_napi_del(struct net_device *dev)
1663 {
1664 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1665
1666 netif_napi_del(&priv->recv_napi);
1667 netif_napi_del(&priv->send_napi);
1668 }
1669
1670 static void ipoib_dev_uninit_default(struct net_device *dev)
1671 {
1672 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1673
1674 ipoib_transport_dev_cleanup(dev);
1675
1676 ipoib_napi_del(dev);
1677
1678 ipoib_cm_dev_cleanup(dev);
1679
1680 kfree(priv->rx_ring);
1681 vfree(priv->tx_ring);
1682
1683 priv->rx_ring = NULL;
1684 priv->tx_ring = NULL;
1685 }
1686
1687 static int ipoib_dev_init_default(struct net_device *dev)
1688 {
1689 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1690
1691 ipoib_napi_add(dev);
1692
1693 /* Allocate RX/TX "rings" to hold queued skbs */
1694 priv->rx_ring = kcalloc(ipoib_recvq_size,
1695 sizeof(*priv->rx_ring),
1696 GFP_KERNEL);
1697 if (!priv->rx_ring)
1698 goto out;
1699
1700 priv->tx_ring = vzalloc(array_size(ipoib_sendq_size,
1701 sizeof(*priv->tx_ring)));
1702 if (!priv->tx_ring) {
1703 pr_warn("%s: failed to allocate TX ring (%d entries)\n",
1704 priv->ca->name, ipoib_sendq_size);
1705 goto out_rx_ring_cleanup;
1706 }
1707
1708 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
1709
1710 if (ipoib_transport_dev_init(dev, priv->ca)) {
1711 pr_warn("%s: ipoib_transport_dev_init failed\n",
1712 priv->ca->name);
1713 goto out_tx_ring_cleanup;
1714 }
1715
1716 /* after qp created set dev address */
1717 priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
1718 priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
1719 priv->dev->dev_addr[3] = (priv->qp->qp_num) & 0xff;
1720
1721 return 0;
1722
1723 out_tx_ring_cleanup:
1724 vfree(priv->tx_ring);
1725
1726 out_rx_ring_cleanup:
1727 kfree(priv->rx_ring);
1728
1729 out:
1730 ipoib_napi_del(dev);
1731 return -ENOMEM;
1732 }
1733
1734 static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr,
1735 int cmd)
1736 {
1737 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1738
1739 if (!priv->rn_ops->ndo_do_ioctl)
1740 return -EOPNOTSUPP;
1741
1742 return priv->rn_ops->ndo_do_ioctl(dev, ifr, cmd);
1743 }
1744
1745 static int ipoib_dev_init(struct net_device *dev)
1746 {
1747 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1748 int ret = -ENOMEM;
1749
1750 priv->qp = NULL;
1751
1752 /*
1753 * the various IPoIB tasks assume they will never race against
1754 * themselves, so always use a single thread workqueue
1755 */
1756 priv->wq = alloc_ordered_workqueue("ipoib_wq", WQ_MEM_RECLAIM);
1757 if (!priv->wq) {
1758 pr_warn("%s: failed to allocate device WQ\n", dev->name);
1759 goto out;
1760 }
1761
1762 /* create pd, which used both for control and datapath*/
1763 priv->pd = ib_alloc_pd(priv->ca, 0);
1764 if (IS_ERR(priv->pd)) {
1765 pr_warn("%s: failed to allocate PD\n", priv->ca->name);
1766 goto clean_wq;
1767 }
1768
1769 ret = priv->rn_ops->ndo_init(dev);
1770 if (ret) {
1771 pr_warn("%s failed to init HW resource\n", dev->name);
1772 goto out_free_pd;
1773 }
1774
1775 ret = ipoib_neigh_hash_init(priv);
1776 if (ret) {
1777 pr_warn("%s failed to init neigh hash\n", dev->name);
1778 goto out_dev_uninit;
1779 }
1780
1781 if (dev->flags & IFF_UP) {
1782 if (ipoib_ib_dev_open(dev)) {
1783 pr_warn("%s failed to open device\n", dev->name);
1784 ret = -ENODEV;
1785 goto out_hash_uninit;
1786 }
1787 }
1788
1789 return 0;
1790
1791 out_hash_uninit:
1792 ipoib_neigh_hash_uninit(dev);
1793
1794 out_dev_uninit:
1795 ipoib_ib_dev_cleanup(dev);
1796
1797 out_free_pd:
1798 if (priv->pd) {
1799 ib_dealloc_pd(priv->pd);
1800 priv->pd = NULL;
1801 }
1802
1803 clean_wq:
1804 if (priv->wq) {
1805 destroy_workqueue(priv->wq);
1806 priv->wq = NULL;
1807 }
1808
1809 out:
1810 return ret;
1811 }
1812
1813 /*
1814 * This must be called before doing an unregister_netdev on a parent device to
1815 * shutdown the IB event handler.
1816 */
1817 static void ipoib_parent_unregister_pre(struct net_device *ndev)
1818 {
1819 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1820
1821 /*
1822 * ipoib_set_mac checks netif_running before pushing work, clearing
1823 * running ensures the it will not add more work.
1824 */
1825 rtnl_lock();
1826 dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP, NULL);
1827 rtnl_unlock();
1828
1829 /* ipoib_event() cannot be running once this returns */
1830 ib_unregister_event_handler(&priv->event_handler);
1831
1832 /*
1833 * Work on the queue grabs the rtnl lock, so this cannot be done while
1834 * also holding it.
1835 */
1836 flush_workqueue(ipoib_workqueue);
1837 }
1838
1839 static void ipoib_set_dev_features(struct ipoib_dev_priv *priv)
1840 {
1841 priv->hca_caps = priv->ca->attrs.device_cap_flags;
1842
1843 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
1844 priv->dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1845
1846 if (priv->hca_caps & IB_DEVICE_UD_TSO)
1847 priv->dev->hw_features |= NETIF_F_TSO;
1848
1849 priv->dev->features |= priv->dev->hw_features;
1850 }
1851 }
1852
1853 static int ipoib_parent_init(struct net_device *ndev)
1854 {
1855 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1856 struct ib_port_attr attr;
1857 int result;
1858
1859 result = ib_query_port(priv->ca, priv->port, &attr);
1860 if (result) {
1861 pr_warn("%s: ib_query_port %d failed\n", priv->ca->name,
1862 priv->port);
1863 return result;
1864 }
1865 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
1866
1867 result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey);
1868 if (result) {
1869 pr_warn("%s: ib_query_pkey port %d failed (ret = %d)\n",
1870 priv->ca->name, priv->port, result);
1871 return result;
1872 }
1873
1874 result = rdma_query_gid(priv->ca, priv->port, 0, &priv->local_gid);
1875 if (result) {
1876 pr_warn("%s: rdma_query_gid port %d failed (ret = %d)\n",
1877 priv->ca->name, priv->port, result);
1878 return result;
1879 }
1880 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw,
1881 sizeof(union ib_gid));
1882
1883 SET_NETDEV_DEV(priv->dev, priv->ca->dev.parent);
1884 priv->dev->dev_port = priv->port - 1;
1885 /* Let's set this one too for backwards compatibility. */
1886 priv->dev->dev_id = priv->port - 1;
1887
1888 return 0;
1889 }
1890
1891 static void ipoib_child_init(struct net_device *ndev)
1892 {
1893 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1894 struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
1895
1896 dev_hold(priv->parent);
1897
1898 down_write(&ppriv->vlan_rwsem);
1899 list_add_tail(&priv->list, &ppriv->child_intfs);
1900 up_write(&ppriv->vlan_rwsem);
1901
1902 priv->max_ib_mtu = ppriv->max_ib_mtu;
1903 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
1904 memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
1905 memcpy(&priv->local_gid, &ppriv->local_gid, sizeof(priv->local_gid));
1906 }
1907
1908 static int ipoib_ndo_init(struct net_device *ndev)
1909 {
1910 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1911 int rc;
1912
1913 if (priv->parent) {
1914 ipoib_child_init(ndev);
1915 } else {
1916 rc = ipoib_parent_init(ndev);
1917 if (rc)
1918 return rc;
1919 }
1920
1921 /* MTU will be reset when mcast join happens */
1922 ndev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
1923 priv->mcast_mtu = priv->admin_mtu = ndev->mtu;
1924 ndev->max_mtu = IPOIB_CM_MTU;
1925
1926 ndev->neigh_priv_len = sizeof(struct ipoib_neigh);
1927
1928 /*
1929 * Set the full membership bit, so that we join the right
1930 * broadcast group, etc.
1931 */
1932 priv->pkey |= 0x8000;
1933
1934 ndev->broadcast[8] = priv->pkey >> 8;
1935 ndev->broadcast[9] = priv->pkey & 0xff;
1936 set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
1937
1938 ipoib_set_dev_features(priv);
1939
1940 rc = ipoib_dev_init(ndev);
1941 if (rc) {
1942 pr_warn("%s: failed to initialize device: %s port %d (ret = %d)\n",
1943 priv->ca->name, priv->dev->name, priv->port, rc);
1944 }
1945
1946 return 0;
1947 }
1948
1949 static void ipoib_ndo_uninit(struct net_device *dev)
1950 {
1951 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1952
1953 ASSERT_RTNL();
1954
1955 /*
1956 * ipoib_remove_one guarantees the children are removed before the
1957 * parent, and that is the only place where a parent can be removed.
1958 */
1959 WARN_ON(!list_empty(&priv->child_intfs));
1960
1961 ipoib_neigh_hash_uninit(dev);
1962
1963 ipoib_ib_dev_cleanup(dev);
1964
1965 /* no more works over the priv->wq */
1966 if (priv->wq) {
1967 flush_workqueue(priv->wq);
1968 destroy_workqueue(priv->wq);
1969 priv->wq = NULL;
1970 }
1971
1972 if (priv->parent) {
1973 struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
1974
1975 down_write(&ppriv->vlan_rwsem);
1976 list_del(&priv->list);
1977 up_write(&ppriv->vlan_rwsem);
1978
1979 dev_put(priv->parent);
1980 }
1981 }
1982
1983 static int ipoib_set_vf_link_state(struct net_device *dev, int vf, int link_state)
1984 {
1985 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1986
1987 return ib_set_vf_link_state(priv->ca, vf, priv->port, link_state);
1988 }
1989
1990 static int ipoib_get_vf_config(struct net_device *dev, int vf,
1991 struct ifla_vf_info *ivf)
1992 {
1993 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1994 int err;
1995
1996 err = ib_get_vf_config(priv->ca, vf, priv->port, ivf);
1997 if (err)
1998 return err;
1999
2000 ivf->vf = vf;
2001
2002 return 0;
2003 }
2004
2005 static int ipoib_set_vf_guid(struct net_device *dev, int vf, u64 guid, int type)
2006 {
2007 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2008
2009 if (type != IFLA_VF_IB_NODE_GUID && type != IFLA_VF_IB_PORT_GUID)
2010 return -EINVAL;
2011
2012 return ib_set_vf_guid(priv->ca, vf, priv->port, guid, type);
2013 }
2014
2015 static int ipoib_get_vf_stats(struct net_device *dev, int vf,
2016 struct ifla_vf_stats *vf_stats)
2017 {
2018 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2019
2020 return ib_get_vf_stats(priv->ca, vf, priv->port, vf_stats);
2021 }
2022
2023 static const struct header_ops ipoib_header_ops = {
2024 .create = ipoib_hard_header,
2025 };
2026
2027 static const struct net_device_ops ipoib_netdev_ops_pf = {
2028 .ndo_init = ipoib_ndo_init,
2029 .ndo_uninit = ipoib_ndo_uninit,
2030 .ndo_open = ipoib_open,
2031 .ndo_stop = ipoib_stop,
2032 .ndo_change_mtu = ipoib_change_mtu,
2033 .ndo_fix_features = ipoib_fix_features,
2034 .ndo_start_xmit = ipoib_start_xmit,
2035 .ndo_tx_timeout = ipoib_timeout,
2036 .ndo_set_rx_mode = ipoib_set_mcast_list,
2037 .ndo_get_iflink = ipoib_get_iflink,
2038 .ndo_set_vf_link_state = ipoib_set_vf_link_state,
2039 .ndo_get_vf_config = ipoib_get_vf_config,
2040 .ndo_get_vf_stats = ipoib_get_vf_stats,
2041 .ndo_set_vf_guid = ipoib_set_vf_guid,
2042 .ndo_set_mac_address = ipoib_set_mac,
2043 .ndo_get_stats64 = ipoib_get_stats,
2044 .ndo_do_ioctl = ipoib_ioctl,
2045 };
2046
2047 static const struct net_device_ops ipoib_netdev_ops_vf = {
2048 .ndo_init = ipoib_ndo_init,
2049 .ndo_uninit = ipoib_ndo_uninit,
2050 .ndo_open = ipoib_open,
2051 .ndo_stop = ipoib_stop,
2052 .ndo_change_mtu = ipoib_change_mtu,
2053 .ndo_fix_features = ipoib_fix_features,
2054 .ndo_start_xmit = ipoib_start_xmit,
2055 .ndo_tx_timeout = ipoib_timeout,
2056 .ndo_set_rx_mode = ipoib_set_mcast_list,
2057 .ndo_get_iflink = ipoib_get_iflink,
2058 .ndo_get_stats64 = ipoib_get_stats,
2059 .ndo_do_ioctl = ipoib_ioctl,
2060 };
2061
2062 void ipoib_setup_common(struct net_device *dev)
2063 {
2064 dev->header_ops = &ipoib_header_ops;
2065
2066 ipoib_set_ethtool_ops(dev);
2067
2068 dev->watchdog_timeo = HZ;
2069
2070 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
2071
2072 dev->hard_header_len = IPOIB_HARD_LEN;
2073 dev->addr_len = INFINIBAND_ALEN;
2074 dev->type = ARPHRD_INFINIBAND;
2075 dev->tx_queue_len = ipoib_sendq_size * 2;
2076 dev->features = (NETIF_F_VLAN_CHALLENGED |
2077 NETIF_F_HIGHDMA);
2078 netif_keep_dst(dev);
2079
2080 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
2081
2082 /*
2083 * unregister_netdev always frees the netdev, we use this mode
2084 * consistently to unify all the various unregister paths, including
2085 * those connected to rtnl_link_ops which require it.
2086 */
2087 dev->needs_free_netdev = true;
2088 }
2089
2090 static void ipoib_build_priv(struct net_device *dev)
2091 {
2092 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2093
2094 priv->dev = dev;
2095 spin_lock_init(&priv->lock);
2096 init_rwsem(&priv->vlan_rwsem);
2097 mutex_init(&priv->mcast_mutex);
2098
2099 INIT_LIST_HEAD(&priv->path_list);
2100 INIT_LIST_HEAD(&priv->child_intfs);
2101 INIT_LIST_HEAD(&priv->dead_ahs);
2102 INIT_LIST_HEAD(&priv->multicast_list);
2103
2104 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
2105 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
2106 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light);
2107 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal);
2108 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
2109 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
2110 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
2111 INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh);
2112 }
2113
2114 static const struct net_device_ops ipoib_netdev_default_pf = {
2115 .ndo_init = ipoib_dev_init_default,
2116 .ndo_uninit = ipoib_dev_uninit_default,
2117 .ndo_open = ipoib_ib_dev_open_default,
2118 .ndo_stop = ipoib_ib_dev_stop_default,
2119 };
2120
2121 static struct net_device *ipoib_alloc_netdev(struct ib_device *hca, u8 port,
2122 const char *name)
2123 {
2124 struct net_device *dev;
2125
2126 dev = rdma_alloc_netdev(hca, port, RDMA_NETDEV_IPOIB, name,
2127 NET_NAME_UNKNOWN, ipoib_setup_common);
2128 if (!IS_ERR(dev) || PTR_ERR(dev) != -EOPNOTSUPP)
2129 return dev;
2130
2131 dev = alloc_netdev(sizeof(struct rdma_netdev), name, NET_NAME_UNKNOWN,
2132 ipoib_setup_common);
2133 if (!dev)
2134 return ERR_PTR(-ENOMEM);
2135 return dev;
2136 }
2137
2138 int ipoib_intf_init(struct ib_device *hca, u8 port, const char *name,
2139 struct net_device *dev)
2140 {
2141 struct rdma_netdev *rn = netdev_priv(dev);
2142 struct ipoib_dev_priv *priv;
2143 int rc;
2144
2145 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2146 if (!priv)
2147 return -ENOMEM;
2148
2149 priv->ca = hca;
2150 priv->port = port;
2151
2152 rc = rdma_init_netdev(hca, port, RDMA_NETDEV_IPOIB, name,
2153 NET_NAME_UNKNOWN, ipoib_setup_common, dev);
2154 if (rc) {
2155 if (rc != -EOPNOTSUPP)
2156 goto out;
2157
2158 dev->netdev_ops = &ipoib_netdev_default_pf;
2159 rn->send = ipoib_send;
2160 rn->attach_mcast = ipoib_mcast_attach;
2161 rn->detach_mcast = ipoib_mcast_detach;
2162 rn->hca = hca;
2163 }
2164
2165 priv->rn_ops = dev->netdev_ops;
2166
2167 if (hca->attrs.device_cap_flags & IB_DEVICE_VIRTUAL_FUNCTION)
2168 dev->netdev_ops = &ipoib_netdev_ops_vf;
2169 else
2170 dev->netdev_ops = &ipoib_netdev_ops_pf;
2171
2172 rn->clnt_priv = priv;
2173 /*
2174 * Only the child register_netdev flows can handle priv_destructor
2175 * being set, so we force it to NULL here and handle manually until it
2176 * is safe to turn on.
2177 */
2178 priv->next_priv_destructor = dev->priv_destructor;
2179 dev->priv_destructor = NULL;
2180
2181 ipoib_build_priv(dev);
2182
2183 return 0;
2184
2185 out:
2186 kfree(priv);
2187 return rc;
2188 }
2189
2190 struct net_device *ipoib_intf_alloc(struct ib_device *hca, u8 port,
2191 const char *name)
2192 {
2193 struct net_device *dev;
2194 int rc;
2195
2196 dev = ipoib_alloc_netdev(hca, port, name);
2197 if (IS_ERR(dev))
2198 return dev;
2199
2200 rc = ipoib_intf_init(hca, port, name, dev);
2201 if (rc) {
2202 free_netdev(dev);
2203 return ERR_PTR(rc);
2204 }
2205
2206 /*
2207 * Upon success the caller must ensure ipoib_intf_free is called or
2208 * register_netdevice succeed'd and priv_destructor is set to
2209 * ipoib_intf_free.
2210 */
2211 return dev;
2212 }
2213
2214 void ipoib_intf_free(struct net_device *dev)
2215 {
2216 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2217 struct rdma_netdev *rn = netdev_priv(dev);
2218
2219 dev->priv_destructor = priv->next_priv_destructor;
2220 if (dev->priv_destructor)
2221 dev->priv_destructor(dev);
2222
2223 /*
2224 * There are some error flows around register_netdev failing that may
2225 * attempt to call priv_destructor twice, prevent that from happening.
2226 */
2227 dev->priv_destructor = NULL;
2228
2229 /* unregister/destroy is very complicated. Make bugs more obvious. */
2230 rn->clnt_priv = NULL;
2231
2232 kfree(priv);
2233 }
2234
2235 static ssize_t show_pkey(struct device *dev,
2236 struct device_attribute *attr, char *buf)
2237 {
2238 struct net_device *ndev = to_net_dev(dev);
2239 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
2240
2241 return sprintf(buf, "0x%04x\n", priv->pkey);
2242 }
2243 static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
2244
2245 static ssize_t show_umcast(struct device *dev,
2246 struct device_attribute *attr, char *buf)
2247 {
2248 struct net_device *ndev = to_net_dev(dev);
2249 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
2250
2251 return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
2252 }
2253
2254 void ipoib_set_umcast(struct net_device *ndev, int umcast_val)
2255 {
2256 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
2257
2258 if (umcast_val > 0) {
2259 set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
2260 ipoib_warn(priv, "ignoring multicast groups joined directly "
2261 "by userspace\n");
2262 } else
2263 clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
2264 }
2265
2266 static ssize_t set_umcast(struct device *dev,
2267 struct device_attribute *attr,
2268 const char *buf, size_t count)
2269 {
2270 unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
2271
2272 ipoib_set_umcast(to_net_dev(dev), umcast_val);
2273
2274 return count;
2275 }
2276 static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
2277
2278 int ipoib_add_umcast_attr(struct net_device *dev)
2279 {
2280 return device_create_file(&dev->dev, &dev_attr_umcast);
2281 }
2282
2283 static void set_base_guid(struct ipoib_dev_priv *priv, union ib_gid *gid)
2284 {
2285 struct ipoib_dev_priv *child_priv;
2286 struct net_device *netdev = priv->dev;
2287
2288 netif_addr_lock_bh(netdev);
2289
2290 memcpy(&priv->local_gid.global.interface_id,
2291 &gid->global.interface_id,
2292 sizeof(gid->global.interface_id));
2293 memcpy(netdev->dev_addr + 4, &priv->local_gid, sizeof(priv->local_gid));
2294 clear_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
2295
2296 netif_addr_unlock_bh(netdev);
2297
2298 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
2299 down_read(&priv->vlan_rwsem);
2300 list_for_each_entry(child_priv, &priv->child_intfs, list)
2301 set_base_guid(child_priv, gid);
2302 up_read(&priv->vlan_rwsem);
2303 }
2304 }
2305
2306 static int ipoib_check_lladdr(struct net_device *dev,
2307 struct sockaddr_storage *ss)
2308 {
2309 union ib_gid *gid = (union ib_gid *)(ss->__data + 4);
2310 int ret = 0;
2311
2312 netif_addr_lock_bh(dev);
2313
2314 /* Make sure the QPN, reserved and subnet prefix match the current
2315 * lladdr, it also makes sure the lladdr is unicast.
2316 */
2317 if (memcmp(dev->dev_addr, ss->__data,
2318 4 + sizeof(gid->global.subnet_prefix)) ||
2319 gid->global.interface_id == 0)
2320 ret = -EINVAL;
2321
2322 netif_addr_unlock_bh(dev);
2323
2324 return ret;
2325 }
2326
2327 static int ipoib_set_mac(struct net_device *dev, void *addr)
2328 {
2329 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2330 struct sockaddr_storage *ss = addr;
2331 int ret;
2332
2333 if (!(dev->priv_flags & IFF_LIVE_ADDR_CHANGE) && netif_running(dev))
2334 return -EBUSY;
2335
2336 ret = ipoib_check_lladdr(dev, ss);
2337 if (ret)
2338 return ret;
2339
2340 set_base_guid(priv, (union ib_gid *)(ss->__data + 4));
2341
2342 queue_work(ipoib_workqueue, &priv->flush_light);
2343
2344 return 0;
2345 }
2346
2347 static ssize_t create_child(struct device *dev,
2348 struct device_attribute *attr,
2349 const char *buf, size_t count)
2350 {
2351 int pkey;
2352 int ret;
2353
2354 if (sscanf(buf, "%i", &pkey) != 1)
2355 return -EINVAL;
2356
2357 if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000)
2358 return -EINVAL;
2359
2360 ret = ipoib_vlan_add(to_net_dev(dev), pkey);
2361
2362 return ret ? ret : count;
2363 }
2364 static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child);
2365
2366 static ssize_t delete_child(struct device *dev,
2367 struct device_attribute *attr,
2368 const char *buf, size_t count)
2369 {
2370 int pkey;
2371 int ret;
2372
2373 if (sscanf(buf, "%i", &pkey) != 1)
2374 return -EINVAL;
2375
2376 if (pkey < 0 || pkey > 0xffff)
2377 return -EINVAL;
2378
2379 ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
2380
2381 return ret ? ret : count;
2382
2383 }
2384 static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child);
2385
2386 int ipoib_add_pkey_attr(struct net_device *dev)
2387 {
2388 return device_create_file(&dev->dev, &dev_attr_pkey);
2389 }
2390
2391 /*
2392 * We erroneously exposed the iface's port number in the dev_id
2393 * sysfs field long after dev_port was introduced for that purpose[1],
2394 * and we need to stop everyone from relying on that.
2395 * Let's overload the shower routine for the dev_id file here
2396 * to gently bring the issue up.
2397 *
2398 * [1] https://www.spinics.net/lists/netdev/msg272123.html
2399 */
2400 static ssize_t dev_id_show(struct device *dev,
2401 struct device_attribute *attr, char *buf)
2402 {
2403 struct net_device *ndev = to_net_dev(dev);
2404
2405 /*
2406 * ndev->dev_port will be equal to 0 in old kernel prior to commit
2407 * 9b8b2a323008 ("IB/ipoib: Use dev_port to expose network interface
2408 * port numbers") Zero was chosen as special case for user space
2409 * applications to fallback and query dev_id to check if it has
2410 * different value or not.
2411 *
2412 * Don't print warning in such scenario.
2413 *
2414 * https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c#L358
2415 */
2416 if (ndev->dev_port && ndev->dev_id == ndev->dev_port)
2417 netdev_info_once(ndev,
2418 "\"%s\" wants to know my dev_id. Should it look at dev_port instead? See Documentation/ABI/testing/sysfs-class-net for more info.\n",
2419 current->comm);
2420
2421 return sprintf(buf, "%#x\n", ndev->dev_id);
2422 }
2423 static DEVICE_ATTR_RO(dev_id);
2424
2425 static int ipoib_intercept_dev_id_attr(struct net_device *dev)
2426 {
2427 device_remove_file(&dev->dev, &dev_attr_dev_id);
2428 return device_create_file(&dev->dev, &dev_attr_dev_id);
2429 }
2430
2431 static struct net_device *ipoib_add_port(const char *format,
2432 struct ib_device *hca, u8 port)
2433 {
2434 struct rtnl_link_ops *ops = ipoib_get_link_ops();
2435 struct rdma_netdev_alloc_params params;
2436 struct ipoib_dev_priv *priv;
2437 struct net_device *ndev;
2438 int result;
2439
2440 ndev = ipoib_intf_alloc(hca, port, format);
2441 if (IS_ERR(ndev)) {
2442 pr_warn("%s, %d: ipoib_intf_alloc failed %ld\n", hca->name, port,
2443 PTR_ERR(ndev));
2444 return ndev;
2445 }
2446 priv = ipoib_priv(ndev);
2447
2448 INIT_IB_EVENT_HANDLER(&priv->event_handler,
2449 priv->ca, ipoib_event);
2450 ib_register_event_handler(&priv->event_handler);
2451
2452 /* call event handler to ensure pkey in sync */
2453 queue_work(ipoib_workqueue, &priv->flush_heavy);
2454
2455 result = register_netdev(ndev);
2456 if (result) {
2457 pr_warn("%s: couldn't register ipoib port %d; error %d\n",
2458 hca->name, port, result);
2459
2460 ipoib_parent_unregister_pre(ndev);
2461 ipoib_intf_free(ndev);
2462 free_netdev(ndev);
2463
2464 return ERR_PTR(result);
2465 }
2466
2467 if (hca->ops.rdma_netdev_get_params) {
2468 int rc = hca->ops.rdma_netdev_get_params(hca, port,
2469 RDMA_NETDEV_IPOIB,
2470 &params);
2471
2472 if (!rc && ops->priv_size < params.sizeof_priv)
2473 ops->priv_size = params.sizeof_priv;
2474 }
2475 /*
2476 * We cannot set priv_destructor before register_netdev because we
2477 * need priv to be always valid during the error flow to execute
2478 * ipoib_parent_unregister_pre(). Instead handle it manually and only
2479 * enter priv_destructor mode once we are completely registered.
2480 */
2481 ndev->priv_destructor = ipoib_intf_free;
2482
2483 if (ipoib_intercept_dev_id_attr(ndev))
2484 goto sysfs_failed;
2485 if (ipoib_cm_add_mode_attr(ndev))
2486 goto sysfs_failed;
2487 if (ipoib_add_pkey_attr(ndev))
2488 goto sysfs_failed;
2489 if (ipoib_add_umcast_attr(ndev))
2490 goto sysfs_failed;
2491 if (device_create_file(&ndev->dev, &dev_attr_create_child))
2492 goto sysfs_failed;
2493 if (device_create_file(&ndev->dev, &dev_attr_delete_child))
2494 goto sysfs_failed;
2495
2496 return ndev;
2497
2498 sysfs_failed:
2499 ipoib_parent_unregister_pre(ndev);
2500 unregister_netdev(ndev);
2501 return ERR_PTR(-ENOMEM);
2502 }
2503
2504 static void ipoib_add_one(struct ib_device *device)
2505 {
2506 struct list_head *dev_list;
2507 struct net_device *dev;
2508 struct ipoib_dev_priv *priv;
2509 unsigned int p;
2510 int count = 0;
2511
2512 dev_list = kmalloc(sizeof(*dev_list), GFP_KERNEL);
2513 if (!dev_list)
2514 return;
2515
2516 INIT_LIST_HEAD(dev_list);
2517
2518 rdma_for_each_port (device, p) {
2519 if (!rdma_protocol_ib(device, p))
2520 continue;
2521 dev = ipoib_add_port("ib%d", device, p);
2522 if (!IS_ERR(dev)) {
2523 priv = ipoib_priv(dev);
2524 list_add_tail(&priv->list, dev_list);
2525 count++;
2526 }
2527 }
2528
2529 if (!count) {
2530 kfree(dev_list);
2531 return;
2532 }
2533
2534 ib_set_client_data(device, &ipoib_client, dev_list);
2535 }
2536
2537 static void ipoib_remove_one(struct ib_device *device, void *client_data)
2538 {
2539 struct ipoib_dev_priv *priv, *tmp, *cpriv, *tcpriv;
2540 struct list_head *dev_list = client_data;
2541
2542 if (!dev_list)
2543 return;
2544
2545 list_for_each_entry_safe(priv, tmp, dev_list, list) {
2546 LIST_HEAD(head);
2547 ipoib_parent_unregister_pre(priv->dev);
2548
2549 rtnl_lock();
2550
2551 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs,
2552 list)
2553 unregister_netdevice_queue(cpriv->dev, &head);
2554 unregister_netdevice_queue(priv->dev, &head);
2555 unregister_netdevice_many(&head);
2556
2557 rtnl_unlock();
2558 }
2559
2560 kfree(dev_list);
2561 }
2562
2563 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
2564 static struct notifier_block ipoib_netdev_notifier = {
2565 .notifier_call = ipoib_netdev_event,
2566 };
2567 #endif
2568
2569 static int __init ipoib_init_module(void)
2570 {
2571 int ret;
2572
2573 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
2574 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
2575 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
2576
2577 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
2578 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
2579 ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE);
2580 #ifdef CONFIG_INFINIBAND_IPOIB_CM
2581 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
2582 ipoib_max_conn_qp = max(ipoib_max_conn_qp, 0);
2583 #endif
2584
2585 /*
2586 * When copying small received packets, we only copy from the
2587 * linear data part of the SKB, so we rely on this condition.
2588 */
2589 BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE);
2590
2591 ipoib_register_debugfs();
2592
2593 /*
2594 * We create a global workqueue here that is used for all flush
2595 * operations. However, if you attempt to flush a workqueue
2596 * from a task on that same workqueue, it deadlocks the system.
2597 * We want to be able to flush the tasks associated with a
2598 * specific net device, so we also create a workqueue for each
2599 * netdevice. We queue up the tasks for that device only on
2600 * its private workqueue, and we only queue up flush events
2601 * on our global flush workqueue. This avoids the deadlocks.
2602 */
2603 ipoib_workqueue = alloc_ordered_workqueue("ipoib_flush", 0);
2604 if (!ipoib_workqueue) {
2605 ret = -ENOMEM;
2606 goto err_fs;
2607 }
2608
2609 ib_sa_register_client(&ipoib_sa_client);
2610
2611 ret = ib_register_client(&ipoib_client);
2612 if (ret)
2613 goto err_sa;
2614
2615 ret = ipoib_netlink_init();
2616 if (ret)
2617 goto err_client;
2618
2619 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
2620 register_netdevice_notifier(&ipoib_netdev_notifier);
2621 #endif
2622 return 0;
2623
2624 err_client:
2625 ib_unregister_client(&ipoib_client);
2626
2627 err_sa:
2628 ib_sa_unregister_client(&ipoib_sa_client);
2629 destroy_workqueue(ipoib_workqueue);
2630
2631 err_fs:
2632 ipoib_unregister_debugfs();
2633
2634 return ret;
2635 }
2636
2637 static void __exit ipoib_cleanup_module(void)
2638 {
2639 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
2640 unregister_netdevice_notifier(&ipoib_netdev_notifier);
2641 #endif
2642 ipoib_netlink_fini();
2643 ib_unregister_client(&ipoib_client);
2644 ib_sa_unregister_client(&ipoib_sa_client);
2645 ipoib_unregister_debugfs();
2646 destroy_workqueue(ipoib_workqueue);
2647 }
2648
2649 module_init(ipoib_init_module);
2650 module_exit(ipoib_cleanup_module);
Linux with added FPC-III support