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[PATCH] IB: sparse endianness cleanup
[deliverable/linux.git] / drivers / infiniband / ulp / ipoib / ipoib_main.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
2a1d9b7f
RD		 3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
1da177e4
LT		 5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $
35 */
36
37#include "ipoib.h"
38
39#include <linux/version.h>
40#include <linux/module.h>
41
42#include <linux/init.h>
43#include <linux/slab.h>
44#include <linux/vmalloc.h>
45
46#include <linux/if_arp.h> /* For ARPHRD_xxx */
47
48#include <linux/ip.h>
49#include <linux/in.h>
50
51MODULE_AUTHOR("Roland Dreier");
52MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
53MODULE_LICENSE("Dual BSD/GPL");
54
55#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
56int ipoib_debug_level;
57
58module_param_named(debug_level, ipoib_debug_level, int, 0644);
59MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
60#endif
61
62static const u8 ipv4_bcast_addr[] = {
63 0x00, 0xff, 0xff, 0xff,
64 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
65 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
66};
67
68struct workqueue_struct *ipoib_workqueue;
69
70static void ipoib_add_one(struct ib_device *device);
71static void ipoib_remove_one(struct ib_device *device);
72
73static struct ib_client ipoib_client = {
74 .name = "ipoib",
75 .add = ipoib_add_one,
76 .remove = ipoib_remove_one
77};
78
79int ipoib_open(struct net_device *dev)
80{
81 struct ipoib_dev_priv *priv = netdev_priv(dev);
82
83 ipoib_dbg(priv, "bringing up interface\n");
84
85 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
86
87 if (ipoib_pkey_dev_delay_open(dev))
88 return 0;
89
90 if (ipoib_ib_dev_open(dev))
91 return -EINVAL;
92
93 if (ipoib_ib_dev_up(dev))
94 return -EINVAL;
95
96 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
97 struct ipoib_dev_priv *cpriv;
98
99 /* Bring up any child interfaces too */
100 down(&priv->vlan_mutex);
101 list_for_each_entry(cpriv, &priv->child_intfs, list) {
102 int flags;
103
104 flags = cpriv->dev->flags;
105 if (flags & IFF_UP)
106 continue;
107
108 dev_change_flags(cpriv->dev, flags | IFF_UP);
109 }
110 up(&priv->vlan_mutex);
111 }
112
113 netif_start_queue(dev);
114
115 return 0;
116}
117
118static int ipoib_stop(struct net_device *dev)
119{
120 struct ipoib_dev_priv *priv = netdev_priv(dev);
121
122 ipoib_dbg(priv, "stopping interface\n");
123
124 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
125
126 netif_stop_queue(dev);
127
128 ipoib_ib_dev_down(dev);
129 ipoib_ib_dev_stop(dev);
130
131 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
132 struct ipoib_dev_priv *cpriv;
133
134 /* Bring down any child interfaces too */
135 down(&priv->vlan_mutex);
136 list_for_each_entry(cpriv, &priv->child_intfs, list) {
137 int flags;
138
139 flags = cpriv->dev->flags;
140 if (!(flags & IFF_UP))
141 continue;
142
143 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
144 }
145 up(&priv->vlan_mutex);
146 }
147
148 return 0;
149}
150
151static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
152{
153 struct ipoib_dev_priv *priv = netdev_priv(dev);
154
155 if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN)
156 return -EINVAL;
157
158 priv->admin_mtu = new_mtu;
159
160 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
161
162 return 0;
163}
164
165static struct ipoib_path *__path_find(struct net_device *dev,
166 union ib_gid *gid)
167{
168 struct ipoib_dev_priv *priv = netdev_priv(dev);
169 struct rb_node *n = priv->path_tree.rb_node;
170 struct ipoib_path *path;
171 int ret;
172
173 while (n) {
174 path = rb_entry(n, struct ipoib_path, rb_node);
175
176 ret = memcmp(gid->raw, path->pathrec.dgid.raw,
177 sizeof (union ib_gid));
178
179 if (ret < 0)
180 n = n->rb_left;
181 else if (ret > 0)
182 n = n->rb_right;
183 else
184 return path;
185 }
186
187 return NULL;
188}
189
190static int __path_add(struct net_device *dev, struct ipoib_path *path)
191{
192 struct ipoib_dev_priv *priv = netdev_priv(dev);
193 struct rb_node **n = &priv->path_tree.rb_node;
194 struct rb_node *pn = NULL;
195 struct ipoib_path *tpath;
196 int ret;
197
198 while (*n) {
199 pn = *n;
200 tpath = rb_entry(pn, struct ipoib_path, rb_node);
201
202 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
203 sizeof (union ib_gid));
204 if (ret < 0)
205 n = &pn->rb_left;
206 else if (ret > 0)
207 n = &pn->rb_right;
208 else
209 return -EEXIST;
210 }
211
212 rb_link_node(&path->rb_node, pn, n);
213 rb_insert_color(&path->rb_node, &priv->path_tree);
214
215 list_add_tail(&path->list, &priv->path_list);
216
217 return 0;
218}
219
220static void path_free(struct net_device *dev, struct ipoib_path *path)
221{
222 struct ipoib_dev_priv *priv = netdev_priv(dev);
223 struct ipoib_neigh *neigh, *tn;
224 struct sk_buff *skb;
225 unsigned long flags;
226
227 while ((skb = __skb_dequeue(&path->queue)))
228 dev_kfree_skb_irq(skb);
229
230 spin_lock_irqsave(&priv->lock, flags);
231
232 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
233 /*
234 * It's safe to call ipoib_put_ah() inside priv->lock
235 * here, because we know that path->ah will always
236 * hold one more reference, so ipoib_put_ah() will
237 * never do more than decrement the ref count.
238 */
239 if (neigh->ah)
240 ipoib_put_ah(neigh->ah);
241 *to_ipoib_neigh(neigh->neighbour) = NULL;
242 neigh->neighbour->ops->destructor = NULL;
243 kfree(neigh);
244 }
245
246 spin_unlock_irqrestore(&priv->lock, flags);
247
248 if (path->ah)
249 ipoib_put_ah(path->ah);
250
251 kfree(path);
252}
253
254void ipoib_flush_paths(struct net_device *dev)
255{
256 struct ipoib_dev_priv *priv = netdev_priv(dev);
257 struct ipoib_path *path, *tp;
258 LIST_HEAD(remove_list);
259 unsigned long flags;
260
261 spin_lock_irqsave(&priv->lock, flags);
262
263 list_splice(&priv->path_list, &remove_list);
264 INIT_LIST_HEAD(&priv->path_list);
265
266 list_for_each_entry(path, &remove_list, list)
267 rb_erase(&path->rb_node, &priv->path_tree);
268
269 spin_unlock_irqrestore(&priv->lock, flags);
270
271 list_for_each_entry_safe(path, tp, &remove_list, list) {
272 if (path->query)
273 ib_sa_cancel_query(path->query_id, path->query);
274 wait_for_completion(&path->done);
275 path_free(dev, path);
276 }
277}
278
279static void path_rec_completion(int status,
280 struct ib_sa_path_rec *pathrec,
281 void *path_ptr)
282{
283 struct ipoib_path *path = path_ptr;
284 struct net_device *dev = path->dev;
285 struct ipoib_dev_priv *priv = netdev_priv(dev);
286 struct ipoib_ah *ah = NULL;
287 struct ipoib_neigh *neigh;
288 struct sk_buff_head skqueue;
289 struct sk_buff *skb;
290 unsigned long flags;
291
292 if (pathrec)
293 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
294 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
295 else
296 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
297 status, IPOIB_GID_ARG(path->pathrec.dgid));
298
299 skb_queue_head_init(&skqueue);
300
301 if (!status) {
302 struct ib_ah_attr av = {
303 .dlid = be16_to_cpu(pathrec->dlid),
304 .sl = pathrec->sl,
305 .port_num = priv->port
306 };
e6ded99c 307 int path_rate = ib_sa_rate_enum_to_int(pathrec->rate);
1da177e4 308
e6ded99c
RD		 309 if (path_rate > 0 && priv->local_rate > path_rate)
310 av.static_rate = (priv->local_rate - 1) / path_rate;
1da177e4
LT		 311
312 ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n",
313 av.static_rate, priv->local_rate,
314 ib_sa_rate_enum_to_int(pathrec->rate));
315
316 ah = ipoib_create_ah(dev, priv->pd, &av);
317 }
318
319 spin_lock_irqsave(&priv->lock, flags);
320
321 path->ah = ah;
322
323 if (ah) {
324 path->pathrec = *pathrec;
325
326 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
327 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
328
329 while ((skb = __skb_dequeue(&path->queue)))
330 __skb_queue_tail(&skqueue, skb);
331
332 list_for_each_entry(neigh, &path->neigh_list, list) {
333 kref_get(&path->ah->ref);
334 neigh->ah = path->ah;
335
336 while ((skb = __skb_dequeue(&neigh->queue)))
337 __skb_queue_tail(&skqueue, skb);
338 }
339 } else
340 path->query = NULL;
341
342 complete(&path->done);
343
344 spin_unlock_irqrestore(&priv->lock, flags);
345
346 while ((skb = __skb_dequeue(&skqueue))) {
347 skb->dev = dev;
348 if (dev_queue_xmit(skb))
349 ipoib_warn(priv, "dev_queue_xmit failed "
350 "to requeue packet\n");
351 }
352}
353
354static struct ipoib_path *path_rec_create(struct net_device *dev,
355 union ib_gid *gid)
356{
357 struct ipoib_dev_priv *priv = netdev_priv(dev);
358 struct ipoib_path *path;
359
360 path = kmalloc(sizeof *path, GFP_ATOMIC);
361 if (!path)
362 return NULL;
363
364 path->dev = dev;
365 path->pathrec.dlid = 0;
366 path->ah = NULL;
367
368 skb_queue_head_init(&path->queue);
369
370 INIT_LIST_HEAD(&path->neigh_list);
371 path->query = NULL;
372 init_completion(&path->done);
373
374 memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid));
375 path->pathrec.sgid = priv->local_gid;
376 path->pathrec.pkey = cpu_to_be16(priv->pkey);
377 path->pathrec.numb_path = 1;
378
379 return path;
380}
381
382static int path_rec_start(struct net_device *dev,
383 struct ipoib_path *path)
384{
385 struct ipoib_dev_priv *priv = netdev_priv(dev);
386
387 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
388 IPOIB_GID_ARG(path->pathrec.dgid));
389
390 path->query_id =
391 ib_sa_path_rec_get(priv->ca, priv->port,
392 &path->pathrec,
393 IB_SA_PATH_REC_DGID |
394 IB_SA_PATH_REC_SGID |
395 IB_SA_PATH_REC_NUMB_PATH |
396 IB_SA_PATH_REC_PKEY,
397 1000, GFP_ATOMIC,
398 path_rec_completion,
399 path, &path->query);
400 if (path->query_id < 0) {
401 ipoib_warn(priv, "ib_sa_path_rec_get failed\n");
402 path->query = NULL;
403 return path->query_id;
404 }
405
406 return 0;
407}
408
409static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
410{
411 struct ipoib_dev_priv *priv = netdev_priv(dev);
412 struct ipoib_path *path;
413 struct ipoib_neigh *neigh;
414
415 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
416 if (!neigh) {
417 ++priv->stats.tx_dropped;
418 dev_kfree_skb_any(skb);
419 return;
420 }
421
422 skb_queue_head_init(&neigh->queue);
423 neigh->neighbour = skb->dst->neighbour;
424 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
425
426 /*
427 * We can only be called from ipoib_start_xmit, so we're
428 * inside tx_lock -- no need to save/restore flags.
429 */
430 spin_lock(&priv->lock);
431
432 path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4));
433 if (!path) {
434 path = path_rec_create(dev,
435 (union ib_gid *) (skb->dst->neighbour->ha + 4));
436 if (!path)
437 goto err;
438
439 __path_add(dev, path);
440 }
441
442 list_add_tail(&neigh->list, &path->neigh_list);
443
444 if (path->pathrec.dlid) {
445 kref_get(&path->ah->ref);
446 neigh->ah = path->ah;
447
448 ipoib_send(dev, skb, path->ah,
449 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
450 } else {
451 neigh->ah = NULL;
452 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
453 __skb_queue_tail(&neigh->queue, skb);
454 } else {
455 ++priv->stats.tx_dropped;
456 dev_kfree_skb_any(skb);
457 }
458
459 if (!path->query && path_rec_start(dev, path))
460 goto err;
461 }
462
463 spin_unlock(&priv->lock);
464 return;
465
466err:
467 *to_ipoib_neigh(skb->dst->neighbour) = NULL;
468 list_del(&neigh->list);
469 neigh->neighbour->ops->destructor = NULL;
470 kfree(neigh);
471
472 ++priv->stats.tx_dropped;
473 dev_kfree_skb_any(skb);
474
475 spin_unlock(&priv->lock);
476}
477
478static void path_lookup(struct sk_buff *skb, struct net_device *dev)
479{
480 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
481
482 /* Look up path record for unicasts */
483 if (skb->dst->neighbour->ha[4] != 0xff) {
484 neigh_add_path(skb, dev);
485 return;
486 }
487
488 /* Add in the P_Key for multicasts */
489 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
490 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
491 ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb);
492}
493
494static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
495 struct ipoib_pseudoheader *phdr)
496{
497 struct ipoib_dev_priv *priv = netdev_priv(dev);
498 struct ipoib_path *path;
499
500 /*
501 * We can only be called from ipoib_start_xmit, so we're
502 * inside tx_lock -- no need to save/restore flags.
503 */
504 spin_lock(&priv->lock);
505
506 path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4));
507 if (!path) {
508 path = path_rec_create(dev,
509 (union ib_gid *) (phdr->hwaddr + 4));
510 if (path) {
511 /* put pseudoheader back on for next time */
512 skb_push(skb, sizeof *phdr);
513 __skb_queue_tail(&path->queue, skb);
514
515 if (path_rec_start(dev, path)) {
516 spin_unlock(&priv->lock);
517 path_free(dev, path);
518 return;
519 } else
520 __path_add(dev, path);
521 } else {
522 ++priv->stats.tx_dropped;
523 dev_kfree_skb_any(skb);
524 }
525
526 spin_unlock(&priv->lock);
527 return;
528 }
529
530 if (path->pathrec.dlid) {
531 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
532 be16_to_cpu(path->pathrec.dlid));
533
534 ipoib_send(dev, skb, path->ah,
535 be32_to_cpup((__be32 *) phdr->hwaddr));
536 } else if ((path->query || !path_rec_start(dev, path)) &&
537 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
538 /* put pseudoheader back on for next time */
539 skb_push(skb, sizeof *phdr);
540 __skb_queue_tail(&path->queue, skb);
541 } else {
542 ++priv->stats.tx_dropped;
543 dev_kfree_skb_any(skb);
544 }
545
546 spin_unlock(&priv->lock);
547}
548
549static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
550{
551 struct ipoib_dev_priv *priv = netdev_priv(dev);
552 struct ipoib_neigh *neigh;
553 unsigned long flags;
554
555 local_irq_save(flags);
556 if (!spin_trylock(&priv->tx_lock)) {
557 local_irq_restore(flags);
558 return NETDEV_TX_LOCKED;
559 }
560
561 /*
562 * Check if our queue is stopped. Since we have the LLTX bit
563 * set, we can't rely on netif_stop_queue() preventing our
564 * xmit function from being called with a full queue.
565 */
566 if (unlikely(netif_queue_stopped(dev))) {
567 spin_unlock_irqrestore(&priv->tx_lock, flags);
568 return NETDEV_TX_BUSY;
569 }
570
571 if (skb->dst && skb->dst->neighbour) {
572 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
573 path_lookup(skb, dev);
574 goto out;
575 }
576
577 neigh = *to_ipoib_neigh(skb->dst->neighbour);
578
579 if (likely(neigh->ah)) {
580 ipoib_send(dev, skb, neigh->ah,
581 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
582 goto out;
583 }
584
585 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
586 spin_lock(&priv->lock);
587 __skb_queue_tail(&neigh->queue, skb);
588 spin_unlock(&priv->lock);
589 } else {
590 ++priv->stats.tx_dropped;
591 dev_kfree_skb_any(skb);
592 }
593 } else {
594 struct ipoib_pseudoheader *phdr =
595 (struct ipoib_pseudoheader *) skb->data;
596 skb_pull(skb, sizeof *phdr);
597
598 if (phdr->hwaddr[4] == 0xff) {
599 /* Add in the P_Key for multicast*/
600 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
601 phdr->hwaddr[9] = priv->pkey & 0xff;
602
603 ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb);
604 } else {
0dca0f7b 605 /* unicast GID -- should be ARP or RARP reply */
1da177e4 606
0dca0f7b
HR		 607 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
608 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
1da177e4
LT		 609 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
610 IPOIB_GID_FMT "\n",
611 skb->dst ? "neigh" : "dst",
97f52eb4
SH		 612 be16_to_cpup((__be16 *) skb->data),
613 be32_to_cpup((__be32 *) phdr->hwaddr),
1da177e4
LT		 614 IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4)));
615 dev_kfree_skb_any(skb);
616 ++priv->stats.tx_dropped;
617 goto out;
618 }
619
620 unicast_arp_send(skb, dev, phdr);
621 }
622 }
623
624out:
625 spin_unlock_irqrestore(&priv->tx_lock, flags);
626
627 return NETDEV_TX_OK;
628}
629
630static struct net_device_stats *ipoib_get_stats(struct net_device *dev)
631{
632 struct ipoib_dev_priv *priv = netdev_priv(dev);
633
634 return &priv->stats;
635}
636
637static void ipoib_timeout(struct net_device *dev)
638{
639 struct ipoib_dev_priv *priv = netdev_priv(dev);
640
641 ipoib_warn(priv, "transmit timeout: latency %ld\n",
642 jiffies - dev->trans_start);
643 /* XXX reset QP, etc. */
644}
645
646static int ipoib_hard_header(struct sk_buff *skb,
647 struct net_device *dev,
648 unsigned short type,
649 void *daddr, void *saddr, unsigned len)
650{
651 struct ipoib_header *header;
652
653 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
654
655 header->proto = htons(type);
656 header->reserved = 0;
657
658 /*
659 * If we don't have a neighbour structure, stuff the
660 * destination address onto the front of the skb so we can
661 * figure out where to send the packet later.
662 */
663 if (!skb->dst || !skb->dst->neighbour) {
664 struct ipoib_pseudoheader *phdr =
665 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
666 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
667 }
668
669 return 0;
670}
671
672static void ipoib_set_mcast_list(struct net_device *dev)
673{
674 struct ipoib_dev_priv *priv = netdev_priv(dev);
675
676 schedule_work(&priv->restart_task);
677}
678
679static void ipoib_neigh_destructor(struct neighbour *n)
680{
681 struct ipoib_neigh *neigh;
682 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
683 unsigned long flags;
684 struct ipoib_ah *ah = NULL;
685
686 ipoib_dbg(priv,
687 "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
688 be32_to_cpup((__be32 *) n->ha),
689 IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4))));
690
691 spin_lock_irqsave(&priv->lock, flags);
692
693 neigh = *to_ipoib_neigh(n);
694 if (neigh) {
695 if (neigh->ah)
696 ah = neigh->ah;
697 list_del(&neigh->list);
698 *to_ipoib_neigh(n) = NULL;
699 kfree(neigh);
700 }
701
702 spin_unlock_irqrestore(&priv->lock, flags);
703
704 if (ah)
705 ipoib_put_ah(ah);
706}
707
708static int ipoib_neigh_setup(struct neighbour *neigh)
709{
710 /*
711 * Is this kosher? I can't find anybody in the kernel that
712 * sets neigh->destructor, so we should be able to set it here
713 * without trouble.
714 */
715 neigh->ops->destructor = ipoib_neigh_destructor;
716
717 return 0;
718}
719
720static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
721{
722 parms->neigh_setup = ipoib_neigh_setup;
723
724 return 0;
725}
726
727int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
728{
729 struct ipoib_dev_priv *priv = netdev_priv(dev);
730
731 /* Allocate RX/TX "rings" to hold queued skbs */
732
733 priv->rx_ring = kmalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf),
734 GFP_KERNEL);
735 if (!priv->rx_ring) {
736 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
737 ca->name, IPOIB_RX_RING_SIZE);
738 goto out;
739 }
740 memset(priv->rx_ring, 0,
741 IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf));
742
743 priv->tx_ring = kmalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf),
744 GFP_KERNEL);
745 if (!priv->tx_ring) {
746 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
747 ca->name, IPOIB_TX_RING_SIZE);
748 goto out_rx_ring_cleanup;
749 }
750 memset(priv->tx_ring, 0,
751 IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf));
752
753 /* priv->tx_head & tx_tail are already 0 */
754
755 if (ipoib_ib_dev_init(dev, ca, port))
756 goto out_tx_ring_cleanup;
757
758 return 0;
759
760out_tx_ring_cleanup:
761 kfree(priv->tx_ring);
762
763out_rx_ring_cleanup:
764 kfree(priv->rx_ring);
765
766out:
767 return -ENOMEM;
768}
769
770void ipoib_dev_cleanup(struct net_device *dev)
771{
772 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
773
774 ipoib_delete_debug_file(dev);
775
776 /* Delete any child interfaces first */
777 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
778 unregister_netdev(cpriv->dev);
779 ipoib_dev_cleanup(cpriv->dev);
780 free_netdev(cpriv->dev);
781 }
782
783 ipoib_ib_dev_cleanup(dev);
784
92a6b34b
HR		 785 kfree(priv->rx_ring);
786 kfree(priv->tx_ring);
1da177e4 787
92a6b34b
HR		 788 priv->rx_ring = NULL;
789 priv->tx_ring = NULL;
1da177e4
LT		 790}
791
792static void ipoib_setup(struct net_device *dev)
793{
794 struct ipoib_dev_priv *priv = netdev_priv(dev);
795
796 dev->open = ipoib_open;
797 dev->stop = ipoib_stop;
798 dev->change_mtu = ipoib_change_mtu;
799 dev->hard_start_xmit = ipoib_start_xmit;
800 dev->get_stats = ipoib_get_stats;
801 dev->tx_timeout = ipoib_timeout;
802 dev->hard_header = ipoib_hard_header;
803 dev->set_multicast_list = ipoib_set_mcast_list;
804 dev->neigh_setup = ipoib_neigh_setup_dev;
805
806 dev->watchdog_timeo = HZ;
807
808 dev->rebuild_header = NULL;
809 dev->set_mac_address = NULL;
810 dev->header_cache_update = NULL;
811
812 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
813
814 /*
815 * We add in INFINIBAND_ALEN to allow for the destination
816 * address "pseudoheader" for skbs without neighbour struct.
817 */
818 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
819 dev->addr_len = INFINIBAND_ALEN;
820 dev->type = ARPHRD_INFINIBAND;
821 dev->tx_queue_len = IPOIB_TX_RING_SIZE * 2;
822 dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
823
824 /* MTU will be reset when mcast join happens */
825 dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN;
826 priv->mcast_mtu = priv->admin_mtu = dev->mtu;
827
828 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
829
830 netif_carrier_off(dev);
831
832 SET_MODULE_OWNER(dev);
833
834 priv->dev = dev;
835
836 spin_lock_init(&priv->lock);
837 spin_lock_init(&priv->tx_lock);
838
839 init_MUTEX(&priv->mcast_mutex);
840 init_MUTEX(&priv->vlan_mutex);
841
842 INIT_LIST_HEAD(&priv->path_list);
843 INIT_LIST_HEAD(&priv->child_intfs);
844 INIT_LIST_HEAD(&priv->dead_ahs);
845 INIT_LIST_HEAD(&priv->multicast_list);
846
847 INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev);
848 INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev);
849 INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev);
850 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev);
851 INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev);
852}
853
854struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
855{
856 struct net_device *dev;
857
858 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
859 ipoib_setup);
860 if (!dev)
861 return NULL;
862
863 return netdev_priv(dev);
864}
865
866static ssize_t show_pkey(struct class_device *cdev, char *buf)
867{
868 struct ipoib_dev_priv *priv =
869 netdev_priv(container_of(cdev, struct net_device, class_dev));
870
871 return sprintf(buf, "0x%04x\n", priv->pkey);
872}
873static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
874
875static ssize_t create_child(struct class_device *cdev,
876 const char *buf, size_t count)
877{
878 int pkey;
879 int ret;
880
881 if (sscanf(buf, "%i", &pkey) != 1)
882 return -EINVAL;
883
884 if (pkey < 0 || pkey > 0xffff)
885 return -EINVAL;
886
887 ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev),
888 pkey);
889
890 return ret ? ret : count;
891}
892static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
893
894static ssize_t delete_child(struct class_device *cdev,
895 const char *buf, size_t count)
896{
897 int pkey;
898 int ret;
899
900 if (sscanf(buf, "%i", &pkey) != 1)
901 return -EINVAL;
902
903 if (pkey < 0 || pkey > 0xffff)
904 return -EINVAL;
905
906 ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev),
907 pkey);
908
909 return ret ? ret : count;
910
911}
912static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
913
914int ipoib_add_pkey_attr(struct net_device *dev)
915{
916 return class_device_create_file(&dev->class_dev,
917 &class_device_attr_pkey);
918}
919
920static struct net_device *ipoib_add_port(const char *format,
921 struct ib_device *hca, u8 port)
922{
923 struct ipoib_dev_priv *priv;
924 int result = -ENOMEM;
925
926 priv = ipoib_intf_alloc(format);
927 if (!priv)
928 goto alloc_mem_failed;
929
930 SET_NETDEV_DEV(priv->dev, hca->dma_device);
931
932 result = ib_query_pkey(hca, port, 0, &priv->pkey);
933 if (result) {
934 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
935 hca->name, port, result);
936 goto alloc_mem_failed;
937 }
938
939 priv->dev->broadcast[8] = priv->pkey >> 8;
940 priv->dev->broadcast[9] = priv->pkey & 0xff;
941
942 result = ib_query_gid(hca, port, 0, &priv->local_gid);
943 if (result) {
944 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
945 hca->name, port, result);
946 goto alloc_mem_failed;
947 } else
948 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
949
950
951 result = ipoib_dev_init(priv->dev, hca, port);
952 if (result < 0) {
953 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
954 hca->name, port, result);
955 goto device_init_failed;
956 }
957
958 INIT_IB_EVENT_HANDLER(&priv->event_handler,
959 priv->ca, ipoib_event);
960 result = ib_register_event_handler(&priv->event_handler);
961 if (result < 0) {
962 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
963 "port %d (ret = %d)\n",
964 hca->name, port, result);
965 goto event_failed;
966 }
967
968 result = register_netdev(priv->dev);
969 if (result) {
970 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
971 hca->name, port, result);
972 goto register_failed;
973 }
974
975 if (ipoib_create_debug_file(priv->dev))
976 goto debug_failed;
977
978 if (ipoib_add_pkey_attr(priv->dev))
979 goto sysfs_failed;
980 if (class_device_create_file(&priv->dev->class_dev,
981 &class_device_attr_create_child))
982 goto sysfs_failed;
983 if (class_device_create_file(&priv->dev->class_dev,
984 &class_device_attr_delete_child))
985 goto sysfs_failed;
986
987 return priv->dev;
988
989sysfs_failed:
990 ipoib_delete_debug_file(priv->dev);
991
992debug_failed:
993 unregister_netdev(priv->dev);
994
995register_failed:
996 ib_unregister_event_handler(&priv->event_handler);
997
998event_failed:
999 ipoib_dev_cleanup(priv->dev);
1000
1001device_init_failed:
1002 free_netdev(priv->dev);
1003
1004alloc_mem_failed:
1005 return ERR_PTR(result);
1006}
1007
1008static void ipoib_add_one(struct ib_device *device)
1009{
1010 struct list_head *dev_list;
1011 struct net_device *dev;
1012 struct ipoib_dev_priv *priv;
1013 int s, e, p;
1014
1015 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1016 if (!dev_list)
1017 return;
1018
1019 INIT_LIST_HEAD(dev_list);
1020
1021 if (device->node_type == IB_NODE_SWITCH) {
1022 s = 0;
1023 e = 0;
1024 } else {
1025 s = 1;
1026 e = device->phys_port_cnt;
1027 }
1028
1029 for (p = s; p <= e; ++p) {
1030 dev = ipoib_add_port("ib%d", device, p);
1031 if (!IS_ERR(dev)) {
1032 priv = netdev_priv(dev);
1033 list_add_tail(&priv->list, dev_list);
1034 }
1035 }
1036
1037 ib_set_client_data(device, &ipoib_client, dev_list);
1038}
1039
1040static void ipoib_remove_one(struct ib_device *device)
1041{
1042 struct ipoib_dev_priv *priv, *tmp;
1043 struct list_head *dev_list;
1044
1045 dev_list = ib_get_client_data(device, &ipoib_client);
1046
1047 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1048 ib_unregister_event_handler(&priv->event_handler);
1049
1050 unregister_netdev(priv->dev);
1051 ipoib_dev_cleanup(priv->dev);
1052 free_netdev(priv->dev);
1053 }
1054}
1055
1056static int __init ipoib_init_module(void)
1057{
1058 int ret;
1059
1060 ret = ipoib_register_debugfs();
1061 if (ret)
1062 return ret;
1063
1064 /*
1065 * We create our own workqueue mainly because we want to be
1066 * able to flush it when devices are being removed. We can't
1067 * use schedule_work()/flush_scheduled_work() because both
1068 * unregister_netdev() and linkwatch_event take the rtnl lock,
1069 * so flush_scheduled_work() can deadlock during device
1070 * removal.
1071 */
1072 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1073 if (!ipoib_workqueue) {
1074 ret = -ENOMEM;
1075 goto err_fs;
1076 }
1077
1078 ret = ib_register_client(&ipoib_client);
1079 if (ret)
1080 goto err_wq;
1081
1082 return 0;
1083
1da177e4
LT		 1084err_wq:
1085 destroy_workqueue(ipoib_workqueue);
1086
9adec1a8
RD		 1087err_fs:
1088 ipoib_unregister_debugfs();
1089
1da177e4
LT		 1090 return ret;
1091}
1092
1093static void __exit ipoib_cleanup_module(void)
1094{
1da177e4 1095 ib_unregister_client(&ipoib_client);
9adec1a8 1096 ipoib_unregister_debugfs();
1da177e4
LT		 1097 destroy_workqueue(ipoib_workqueue);
1098}
1099
1100module_init(ipoib_init_module);
1101module_exit(ipoib_cleanup_module);
Linux kernel - Deliverables
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