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[PATCH] [IB/cm]: Correct CM port redirect reject codes
[deliverable/linux.git] / drivers / infiniband / ulp / ipoib / ipoib_main.c
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1da177e4
LT		 1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $
33 */
34
35#include "ipoib.h"
36
37#include <linux/version.h>
38#include <linux/module.h>
39
40#include <linux/init.h>
41#include <linux/slab.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
49MODULE_AUTHOR("Roland Dreier");
50MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
51MODULE_LICENSE("Dual BSD/GPL");
52
53#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
54int ipoib_debug_level;
55
56module_param_named(debug_level, ipoib_debug_level, int, 0644);
57MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
58#endif
59
60static const u8 ipv4_bcast_addr[] = {
61 0x00, 0xff, 0xff, 0xff,
62 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
63 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
64};
65
66struct workqueue_struct *ipoib_workqueue;
67
68static void ipoib_add_one(struct ib_device *device);
69static void ipoib_remove_one(struct ib_device *device);
70
71static struct ib_client ipoib_client = {
72 .name = "ipoib",
73 .add = ipoib_add_one,
74 .remove = ipoib_remove_one
75};
76
77int ipoib_open(struct net_device *dev)
78{
79 struct ipoib_dev_priv *priv = netdev_priv(dev);
80
81 ipoib_dbg(priv, "bringing up interface\n");
82
83 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
84
85 if (ipoib_pkey_dev_delay_open(dev))
86 return 0;
87
88 if (ipoib_ib_dev_open(dev))
89 return -EINVAL;
90
91 if (ipoib_ib_dev_up(dev))
92 return -EINVAL;
93
94 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
95 struct ipoib_dev_priv *cpriv;
96
97 /* Bring up any child interfaces too */
98 down(&priv->vlan_mutex);
99 list_for_each_entry(cpriv, &priv->child_intfs, list) {
100 int flags;
101
102 flags = cpriv->dev->flags;
103 if (flags & IFF_UP)
104 continue;
105
106 dev_change_flags(cpriv->dev, flags | IFF_UP);
107 }
108 up(&priv->vlan_mutex);
109 }
110
111 netif_start_queue(dev);
112
113 return 0;
114}
115
116static int ipoib_stop(struct net_device *dev)
117{
118 struct ipoib_dev_priv *priv = netdev_priv(dev);
119
120 ipoib_dbg(priv, "stopping interface\n");
121
122 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
123
124 netif_stop_queue(dev);
125
126 ipoib_ib_dev_down(dev);
127 ipoib_ib_dev_stop(dev);
128
129 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
130 struct ipoib_dev_priv *cpriv;
131
132 /* Bring down any child interfaces too */
133 down(&priv->vlan_mutex);
134 list_for_each_entry(cpriv, &priv->child_intfs, list) {
135 int flags;
136
137 flags = cpriv->dev->flags;
138 if (!(flags & IFF_UP))
139 continue;
140
141 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
142 }
143 up(&priv->vlan_mutex);
144 }
145
146 return 0;
147}
148
149static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
150{
151 struct ipoib_dev_priv *priv = netdev_priv(dev);
152
153 if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN)
154 return -EINVAL;
155
156 priv->admin_mtu = new_mtu;
157
158 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
159
160 return 0;
161}
162
163static struct ipoib_path *__path_find(struct net_device *dev,
164 union ib_gid *gid)
165{
166 struct ipoib_dev_priv *priv = netdev_priv(dev);
167 struct rb_node *n = priv->path_tree.rb_node;
168 struct ipoib_path *path;
169 int ret;
170
171 while (n) {
172 path = rb_entry(n, struct ipoib_path, rb_node);
173
174 ret = memcmp(gid->raw, path->pathrec.dgid.raw,
175 sizeof (union ib_gid));
176
177 if (ret < 0)
178 n = n->rb_left;
179 else if (ret > 0)
180 n = n->rb_right;
181 else
182 return path;
183 }
184
185 return NULL;
186}
187
188static int __path_add(struct net_device *dev, struct ipoib_path *path)
189{
190 struct ipoib_dev_priv *priv = netdev_priv(dev);
191 struct rb_node **n = &priv->path_tree.rb_node;
192 struct rb_node *pn = NULL;
193 struct ipoib_path *tpath;
194 int ret;
195
196 while (*n) {
197 pn = *n;
198 tpath = rb_entry(pn, struct ipoib_path, rb_node);
199
200 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
201 sizeof (union ib_gid));
202 if (ret < 0)
203 n = &pn->rb_left;
204 else if (ret > 0)
205 n = &pn->rb_right;
206 else
207 return -EEXIST;
208 }
209
210 rb_link_node(&path->rb_node, pn, n);
211 rb_insert_color(&path->rb_node, &priv->path_tree);
212
213 list_add_tail(&path->list, &priv->path_list);
214
215 return 0;
216}
217
218static void path_free(struct net_device *dev, struct ipoib_path *path)
219{
220 struct ipoib_dev_priv *priv = netdev_priv(dev);
221 struct ipoib_neigh *neigh, *tn;
222 struct sk_buff *skb;
223 unsigned long flags;
224
225 while ((skb = __skb_dequeue(&path->queue)))
226 dev_kfree_skb_irq(skb);
227
228 spin_lock_irqsave(&priv->lock, flags);
229
230 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
231 /*
232 * It's safe to call ipoib_put_ah() inside priv->lock
233 * here, because we know that path->ah will always
234 * hold one more reference, so ipoib_put_ah() will
235 * never do more than decrement the ref count.
236 */
237 if (neigh->ah)
238 ipoib_put_ah(neigh->ah);
239 *to_ipoib_neigh(neigh->neighbour) = NULL;
240 neigh->neighbour->ops->destructor = NULL;
241 kfree(neigh);
242 }
243
244 spin_unlock_irqrestore(&priv->lock, flags);
245
246 if (path->ah)
247 ipoib_put_ah(path->ah);
248
249 kfree(path);
250}
251
252void ipoib_flush_paths(struct net_device *dev)
253{
254 struct ipoib_dev_priv *priv = netdev_priv(dev);
255 struct ipoib_path *path, *tp;
256 LIST_HEAD(remove_list);
257 unsigned long flags;
258
259 spin_lock_irqsave(&priv->lock, flags);
260
261 list_splice(&priv->path_list, &remove_list);
262 INIT_LIST_HEAD(&priv->path_list);
263
264 list_for_each_entry(path, &remove_list, list)
265 rb_erase(&path->rb_node, &priv->path_tree);
266
267 spin_unlock_irqrestore(&priv->lock, flags);
268
269 list_for_each_entry_safe(path, tp, &remove_list, list) {
270 if (path->query)
271 ib_sa_cancel_query(path->query_id, path->query);
272 wait_for_completion(&path->done);
273 path_free(dev, path);
274 }
275}
276
277static void path_rec_completion(int status,
278 struct ib_sa_path_rec *pathrec,
279 void *path_ptr)
280{
281 struct ipoib_path *path = path_ptr;
282 struct net_device *dev = path->dev;
283 struct ipoib_dev_priv *priv = netdev_priv(dev);
284 struct ipoib_ah *ah = NULL;
285 struct ipoib_neigh *neigh;
286 struct sk_buff_head skqueue;
287 struct sk_buff *skb;
288 unsigned long flags;
289
290 if (pathrec)
291 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
292 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
293 else
294 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
295 status, IPOIB_GID_ARG(path->pathrec.dgid));
296
297 skb_queue_head_init(&skqueue);
298
299 if (!status) {
300 struct ib_ah_attr av = {
301 .dlid = be16_to_cpu(pathrec->dlid),
302 .sl = pathrec->sl,
303 .port_num = priv->port
304 };
e6ded99c 305 int path_rate = ib_sa_rate_enum_to_int(pathrec->rate);
1da177e4 306
e6ded99c
RD		 307 if (path_rate > 0 && priv->local_rate > path_rate)
308 av.static_rate = (priv->local_rate - 1) / path_rate;
1da177e4
LT		 309
310 ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n",
311 av.static_rate, priv->local_rate,
312 ib_sa_rate_enum_to_int(pathrec->rate));
313
314 ah = ipoib_create_ah(dev, priv->pd, &av);
315 }
316
317 spin_lock_irqsave(&priv->lock, flags);
318
319 path->ah = ah;
320
321 if (ah) {
322 path->pathrec = *pathrec;
323
324 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
325 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
326
327 while ((skb = __skb_dequeue(&path->queue)))
328 __skb_queue_tail(&skqueue, skb);
329
330 list_for_each_entry(neigh, &path->neigh_list, list) {
331 kref_get(&path->ah->ref);
332 neigh->ah = path->ah;
333
334 while ((skb = __skb_dequeue(&neigh->queue)))
335 __skb_queue_tail(&skqueue, skb);
336 }
337 } else
338 path->query = NULL;
339
340 complete(&path->done);
341
342 spin_unlock_irqrestore(&priv->lock, flags);
343
344 while ((skb = __skb_dequeue(&skqueue))) {
345 skb->dev = dev;
346 if (dev_queue_xmit(skb))
347 ipoib_warn(priv, "dev_queue_xmit failed "
348 "to requeue packet\n");
349 }
350}
351
352static struct ipoib_path *path_rec_create(struct net_device *dev,
353 union ib_gid *gid)
354{
355 struct ipoib_dev_priv *priv = netdev_priv(dev);
356 struct ipoib_path *path;
357
358 path = kmalloc(sizeof *path, GFP_ATOMIC);
359 if (!path)
360 return NULL;
361
362 path->dev = dev;
363 path->pathrec.dlid = 0;
364 path->ah = NULL;
365
366 skb_queue_head_init(&path->queue);
367
368 INIT_LIST_HEAD(&path->neigh_list);
369 path->query = NULL;
370 init_completion(&path->done);
371
372 memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid));
373 path->pathrec.sgid = priv->local_gid;
374 path->pathrec.pkey = cpu_to_be16(priv->pkey);
375 path->pathrec.numb_path = 1;
376
377 return path;
378}
379
380static int path_rec_start(struct net_device *dev,
381 struct ipoib_path *path)
382{
383 struct ipoib_dev_priv *priv = netdev_priv(dev);
384
385 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
386 IPOIB_GID_ARG(path->pathrec.dgid));
387
388 path->query_id =
389 ib_sa_path_rec_get(priv->ca, priv->port,
390 &path->pathrec,
391 IB_SA_PATH_REC_DGID |
392 IB_SA_PATH_REC_SGID |
393 IB_SA_PATH_REC_NUMB_PATH |
394 IB_SA_PATH_REC_PKEY,
395 1000, GFP_ATOMIC,
396 path_rec_completion,
397 path, &path->query);
398 if (path->query_id < 0) {
399 ipoib_warn(priv, "ib_sa_path_rec_get failed\n");
400 path->query = NULL;
401 return path->query_id;
402 }
403
404 return 0;
405}
406
407static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
408{
409 struct ipoib_dev_priv *priv = netdev_priv(dev);
410 struct ipoib_path *path;
411 struct ipoib_neigh *neigh;
412
413 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
414 if (!neigh) {
415 ++priv->stats.tx_dropped;
416 dev_kfree_skb_any(skb);
417 return;
418 }
419
420 skb_queue_head_init(&neigh->queue);
421 neigh->neighbour = skb->dst->neighbour;
422 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
423
424 /*
425 * We can only be called from ipoib_start_xmit, so we're
426 * inside tx_lock -- no need to save/restore flags.
427 */
428 spin_lock(&priv->lock);
429
430 path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4));
431 if (!path) {
432 path = path_rec_create(dev,
433 (union ib_gid *) (skb->dst->neighbour->ha + 4));
434 if (!path)
435 goto err;
436
437 __path_add(dev, path);
438 }
439
440 list_add_tail(&neigh->list, &path->neigh_list);
441
442 if (path->pathrec.dlid) {
443 kref_get(&path->ah->ref);
444 neigh->ah = path->ah;
445
446 ipoib_send(dev, skb, path->ah,
447 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
448 } else {
449 neigh->ah = NULL;
450 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
451 __skb_queue_tail(&neigh->queue, skb);
452 } else {
453 ++priv->stats.tx_dropped;
454 dev_kfree_skb_any(skb);
455 }
456
457 if (!path->query && path_rec_start(dev, path))
458 goto err;
459 }
460
461 spin_unlock(&priv->lock);
462 return;
463
464err:
465 *to_ipoib_neigh(skb->dst->neighbour) = NULL;
466 list_del(&neigh->list);
467 neigh->neighbour->ops->destructor = NULL;
468 kfree(neigh);
469
470 ++priv->stats.tx_dropped;
471 dev_kfree_skb_any(skb);
472
473 spin_unlock(&priv->lock);
474}
475
476static void path_lookup(struct sk_buff *skb, struct net_device *dev)
477{
478 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
479
480 /* Look up path record for unicasts */
481 if (skb->dst->neighbour->ha[4] != 0xff) {
482 neigh_add_path(skb, dev);
483 return;
484 }
485
486 /* Add in the P_Key for multicasts */
487 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
488 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
489 ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb);
490}
491
492static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
493 struct ipoib_pseudoheader *phdr)
494{
495 struct ipoib_dev_priv *priv = netdev_priv(dev);
496 struct ipoib_path *path;
497
498 /*
499 * We can only be called from ipoib_start_xmit, so we're
500 * inside tx_lock -- no need to save/restore flags.
501 */
502 spin_lock(&priv->lock);
503
504 path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4));
505 if (!path) {
506 path = path_rec_create(dev,
507 (union ib_gid *) (phdr->hwaddr + 4));
508 if (path) {
509 /* put pseudoheader back on for next time */
510 skb_push(skb, sizeof *phdr);
511 __skb_queue_tail(&path->queue, skb);
512
513 if (path_rec_start(dev, path)) {
514 spin_unlock(&priv->lock);
515 path_free(dev, path);
516 return;
517 } else
518 __path_add(dev, path);
519 } else {
520 ++priv->stats.tx_dropped;
521 dev_kfree_skb_any(skb);
522 }
523
524 spin_unlock(&priv->lock);
525 return;
526 }
527
528 if (path->pathrec.dlid) {
529 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
530 be16_to_cpu(path->pathrec.dlid));
531
532 ipoib_send(dev, skb, path->ah,
533 be32_to_cpup((__be32 *) phdr->hwaddr));
534 } else if ((path->query || !path_rec_start(dev, path)) &&
535 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
536 /* put pseudoheader back on for next time */
537 skb_push(skb, sizeof *phdr);
538 __skb_queue_tail(&path->queue, skb);
539 } else {
540 ++priv->stats.tx_dropped;
541 dev_kfree_skb_any(skb);
542 }
543
544 spin_unlock(&priv->lock);
545}
546
547static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
548{
549 struct ipoib_dev_priv *priv = netdev_priv(dev);
550 struct ipoib_neigh *neigh;
551 unsigned long flags;
552
553 local_irq_save(flags);
554 if (!spin_trylock(&priv->tx_lock)) {
555 local_irq_restore(flags);
556 return NETDEV_TX_LOCKED;
557 }
558
559 /*
560 * Check if our queue is stopped. Since we have the LLTX bit
561 * set, we can't rely on netif_stop_queue() preventing our
562 * xmit function from being called with a full queue.
563 */
564 if (unlikely(netif_queue_stopped(dev))) {
565 spin_unlock_irqrestore(&priv->tx_lock, flags);
566 return NETDEV_TX_BUSY;
567 }
568
569 if (skb->dst && skb->dst->neighbour) {
570 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
571 path_lookup(skb, dev);
572 goto out;
573 }
574
575 neigh = *to_ipoib_neigh(skb->dst->neighbour);
576
577 if (likely(neigh->ah)) {
578 ipoib_send(dev, skb, neigh->ah,
579 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
580 goto out;
581 }
582
583 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
584 spin_lock(&priv->lock);
585 __skb_queue_tail(&neigh->queue, skb);
586 spin_unlock(&priv->lock);
587 } else {
588 ++priv->stats.tx_dropped;
589 dev_kfree_skb_any(skb);
590 }
591 } else {
592 struct ipoib_pseudoheader *phdr =
593 (struct ipoib_pseudoheader *) skb->data;
594 skb_pull(skb, sizeof *phdr);
595
596 if (phdr->hwaddr[4] == 0xff) {
597 /* Add in the P_Key for multicast*/
598 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
599 phdr->hwaddr[9] = priv->pkey & 0xff;
600
601 ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb);
602 } else {
603 /* unicast GID -- should be ARP reply */
604
605 if (be16_to_cpup((u16 *) skb->data) != ETH_P_ARP) {
606 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
607 IPOIB_GID_FMT "\n",
608 skb->dst ? "neigh" : "dst",
609 be16_to_cpup((u16 *) skb->data),
610 be32_to_cpup((u32 *) phdr->hwaddr),
611 IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4)));
612 dev_kfree_skb_any(skb);
613 ++priv->stats.tx_dropped;
614 goto out;
615 }
616
617 unicast_arp_send(skb, dev, phdr);
618 }
619 }
620
621out:
622 spin_unlock_irqrestore(&priv->tx_lock, flags);
623
624 return NETDEV_TX_OK;
625}
626
627static struct net_device_stats *ipoib_get_stats(struct net_device *dev)
628{
629 struct ipoib_dev_priv *priv = netdev_priv(dev);
630
631 return &priv->stats;
632}
633
634static void ipoib_timeout(struct net_device *dev)
635{
636 struct ipoib_dev_priv *priv = netdev_priv(dev);
637
638 ipoib_warn(priv, "transmit timeout: latency %ld\n",
639 jiffies - dev->trans_start);
640 /* XXX reset QP, etc. */
641}
642
643static int ipoib_hard_header(struct sk_buff *skb,
644 struct net_device *dev,
645 unsigned short type,
646 void *daddr, void *saddr, unsigned len)
647{
648 struct ipoib_header *header;
649
650 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
651
652 header->proto = htons(type);
653 header->reserved = 0;
654
655 /*
656 * If we don't have a neighbour structure, stuff the
657 * destination address onto the front of the skb so we can
658 * figure out where to send the packet later.
659 */
660 if (!skb->dst || !skb->dst->neighbour) {
661 struct ipoib_pseudoheader *phdr =
662 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
663 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
664 }
665
666 return 0;
667}
668
669static void ipoib_set_mcast_list(struct net_device *dev)
670{
671 struct ipoib_dev_priv *priv = netdev_priv(dev);
672
673 schedule_work(&priv->restart_task);
674}
675
676static void ipoib_neigh_destructor(struct neighbour *n)
677{
678 struct ipoib_neigh *neigh;
679 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
680 unsigned long flags;
681 struct ipoib_ah *ah = NULL;
682
683 ipoib_dbg(priv,
684 "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
685 be32_to_cpup((__be32 *) n->ha),
686 IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4))));
687
688 spin_lock_irqsave(&priv->lock, flags);
689
690 neigh = *to_ipoib_neigh(n);
691 if (neigh) {
692 if (neigh->ah)
693 ah = neigh->ah;
694 list_del(&neigh->list);
695 *to_ipoib_neigh(n) = NULL;
696 kfree(neigh);
697 }
698
699 spin_unlock_irqrestore(&priv->lock, flags);
700
701 if (ah)
702 ipoib_put_ah(ah);
703}
704
705static int ipoib_neigh_setup(struct neighbour *neigh)
706{
707 /*
708 * Is this kosher? I can't find anybody in the kernel that
709 * sets neigh->destructor, so we should be able to set it here
710 * without trouble.
711 */
712 neigh->ops->destructor = ipoib_neigh_destructor;
713
714 return 0;
715}
716
717static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
718{
719 parms->neigh_setup = ipoib_neigh_setup;
720
721 return 0;
722}
723
724int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
725{
726 struct ipoib_dev_priv *priv = netdev_priv(dev);
727
728 /* Allocate RX/TX "rings" to hold queued skbs */
729
730 priv->rx_ring = kmalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf),
731 GFP_KERNEL);
732 if (!priv->rx_ring) {
733 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
734 ca->name, IPOIB_RX_RING_SIZE);
735 goto out;
736 }
737 memset(priv->rx_ring, 0,
738 IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf));
739
740 priv->tx_ring = kmalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf),
741 GFP_KERNEL);
742 if (!priv->tx_ring) {
743 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
744 ca->name, IPOIB_TX_RING_SIZE);
745 goto out_rx_ring_cleanup;
746 }
747 memset(priv->tx_ring, 0,
748 IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf));
749
750 /* priv->tx_head & tx_tail are already 0 */
751
752 if (ipoib_ib_dev_init(dev, ca, port))
753 goto out_tx_ring_cleanup;
754
755 return 0;
756
757out_tx_ring_cleanup:
758 kfree(priv->tx_ring);
759
760out_rx_ring_cleanup:
761 kfree(priv->rx_ring);
762
763out:
764 return -ENOMEM;
765}
766
767void ipoib_dev_cleanup(struct net_device *dev)
768{
769 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
770
771 ipoib_delete_debug_file(dev);
772
773 /* Delete any child interfaces first */
774 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
775 unregister_netdev(cpriv->dev);
776 ipoib_dev_cleanup(cpriv->dev);
777 free_netdev(cpriv->dev);
778 }
779
780 ipoib_ib_dev_cleanup(dev);
781
782 if (priv->rx_ring) {
783 kfree(priv->rx_ring);
784 priv->rx_ring = NULL;
785 }
786
787 if (priv->tx_ring) {
788 kfree(priv->tx_ring);
789 priv->tx_ring = NULL;
790 }
791}
792
793static void ipoib_setup(struct net_device *dev)
794{
795 struct ipoib_dev_priv *priv = netdev_priv(dev);
796
797 dev->open = ipoib_open;
798 dev->stop = ipoib_stop;
799 dev->change_mtu = ipoib_change_mtu;
800 dev->hard_start_xmit = ipoib_start_xmit;
801 dev->get_stats = ipoib_get_stats;
802 dev->tx_timeout = ipoib_timeout;
803 dev->hard_header = ipoib_hard_header;
804 dev->set_multicast_list = ipoib_set_mcast_list;
805 dev->neigh_setup = ipoib_neigh_setup_dev;
806
807 dev->watchdog_timeo = HZ;
808
809 dev->rebuild_header = NULL;
810 dev->set_mac_address = NULL;
811 dev->header_cache_update = NULL;
812
813 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
814
815 /*
816 * We add in INFINIBAND_ALEN to allow for the destination
817 * address "pseudoheader" for skbs without neighbour struct.
818 */
819 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
820 dev->addr_len = INFINIBAND_ALEN;
821 dev->type = ARPHRD_INFINIBAND;
822 dev->tx_queue_len = IPOIB_TX_RING_SIZE * 2;
823 dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
824
825 /* MTU will be reset when mcast join happens */
826 dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN;
827 priv->mcast_mtu = priv->admin_mtu = dev->mtu;
828
829 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
830
831 netif_carrier_off(dev);
832
833 SET_MODULE_OWNER(dev);
834
835 priv->dev = dev;
836
837 spin_lock_init(&priv->lock);
838 spin_lock_init(&priv->tx_lock);
839
840 init_MUTEX(&priv->mcast_mutex);
841 init_MUTEX(&priv->vlan_mutex);
842
843 INIT_LIST_HEAD(&priv->path_list);
844 INIT_LIST_HEAD(&priv->child_intfs);
845 INIT_LIST_HEAD(&priv->dead_ahs);
846 INIT_LIST_HEAD(&priv->multicast_list);
847
848 INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev);
849 INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev);
850 INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev);
851 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev);
852 INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev);
853}
854
855struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
856{
857 struct net_device *dev;
858
859 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
860 ipoib_setup);
861 if (!dev)
862 return NULL;
863
864 return netdev_priv(dev);
865}
866
867static ssize_t show_pkey(struct class_device *cdev, char *buf)
868{
869 struct ipoib_dev_priv *priv =
870 netdev_priv(container_of(cdev, struct net_device, class_dev));
871
872 return sprintf(buf, "0x%04x\n", priv->pkey);
873}
874static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
875
876static ssize_t create_child(struct class_device *cdev,
877 const char *buf, size_t count)
878{
879 int pkey;
880 int ret;
881
882 if (sscanf(buf, "%i", &pkey) != 1)
883 return -EINVAL;
884
885 if (pkey < 0 || pkey > 0xffff)
886 return -EINVAL;
887
888 ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev),
889 pkey);
890
891 return ret ? ret : count;
892}
893static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
894
895static ssize_t delete_child(struct class_device *cdev,
896 const char *buf, size_t count)
897{
898 int pkey;
899 int ret;
900
901 if (sscanf(buf, "%i", &pkey) != 1)
902 return -EINVAL;
903
904 if (pkey < 0 || pkey > 0xffff)
905 return -EINVAL;
906
907 ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev),
908 pkey);
909
910 return ret ? ret : count;
911
912}
913static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
914
915int ipoib_add_pkey_attr(struct net_device *dev)
916{
917 return class_device_create_file(&dev->class_dev,
918 &class_device_attr_pkey);
919}
920
921static struct net_device *ipoib_add_port(const char *format,
922 struct ib_device *hca, u8 port)
923{
924 struct ipoib_dev_priv *priv;
925 int result = -ENOMEM;
926
927 priv = ipoib_intf_alloc(format);
928 if (!priv)
929 goto alloc_mem_failed;
930
931 SET_NETDEV_DEV(priv->dev, hca->dma_device);
932
933 result = ib_query_pkey(hca, port, 0, &priv->pkey);
934 if (result) {
935 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
936 hca->name, port, result);
937 goto alloc_mem_failed;
938 }
939
940 priv->dev->broadcast[8] = priv->pkey >> 8;
941 priv->dev->broadcast[9] = priv->pkey & 0xff;
942
943 result = ib_query_gid(hca, port, 0, &priv->local_gid);
944 if (result) {
945 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
946 hca->name, port, result);
947 goto alloc_mem_failed;
948 } else
949 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
950
951
952 result = ipoib_dev_init(priv->dev, hca, port);
953 if (result < 0) {
954 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
955 hca->name, port, result);
956 goto device_init_failed;
957 }
958
959 INIT_IB_EVENT_HANDLER(&priv->event_handler,
960 priv->ca, ipoib_event);
961 result = ib_register_event_handler(&priv->event_handler);
962 if (result < 0) {
963 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
964 "port %d (ret = %d)\n",
965 hca->name, port, result);
966 goto event_failed;
967 }
968
969 result = register_netdev(priv->dev);
970 if (result) {
971 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
972 hca->name, port, result);
973 goto register_failed;
974 }
975
976 if (ipoib_create_debug_file(priv->dev))
977 goto debug_failed;
978
979 if (ipoib_add_pkey_attr(priv->dev))
980 goto sysfs_failed;
981 if (class_device_create_file(&priv->dev->class_dev,
982 &class_device_attr_create_child))
983 goto sysfs_failed;
984 if (class_device_create_file(&priv->dev->class_dev,
985 &class_device_attr_delete_child))
986 goto sysfs_failed;
987
988 return priv->dev;
989
990sysfs_failed:
991 ipoib_delete_debug_file(priv->dev);
992
993debug_failed:
994 unregister_netdev(priv->dev);
995
996register_failed:
997 ib_unregister_event_handler(&priv->event_handler);
998
999event_failed:
1000 ipoib_dev_cleanup(priv->dev);
1001
1002device_init_failed:
1003 free_netdev(priv->dev);
1004
1005alloc_mem_failed:
1006 return ERR_PTR(result);
1007}
1008
1009static void ipoib_add_one(struct ib_device *device)
1010{
1011 struct list_head *dev_list;
1012 struct net_device *dev;
1013 struct ipoib_dev_priv *priv;
1014 int s, e, p;
1015
1016 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1017 if (!dev_list)
1018 return;
1019
1020 INIT_LIST_HEAD(dev_list);
1021
1022 if (device->node_type == IB_NODE_SWITCH) {
1023 s = 0;
1024 e = 0;
1025 } else {
1026 s = 1;
1027 e = device->phys_port_cnt;
1028 }
1029
1030 for (p = s; p <= e; ++p) {
1031 dev = ipoib_add_port("ib%d", device, p);
1032 if (!IS_ERR(dev)) {
1033 priv = netdev_priv(dev);
1034 list_add_tail(&priv->list, dev_list);
1035 }
1036 }
1037
1038 ib_set_client_data(device, &ipoib_client, dev_list);
1039}
1040
1041static void ipoib_remove_one(struct ib_device *device)
1042{
1043 struct ipoib_dev_priv *priv, *tmp;
1044 struct list_head *dev_list;
1045
1046 dev_list = ib_get_client_data(device, &ipoib_client);
1047
1048 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1049 ib_unregister_event_handler(&priv->event_handler);
1050
1051 unregister_netdev(priv->dev);
1052 ipoib_dev_cleanup(priv->dev);
1053 free_netdev(priv->dev);
1054 }
1055}
1056
1057static int __init ipoib_init_module(void)
1058{
1059 int ret;
1060
1061 ret = ipoib_register_debugfs();
1062 if (ret)
1063 return ret;
1064
1065 /*
1066 * We create our own workqueue mainly because we want to be
1067 * able to flush it when devices are being removed. We can't
1068 * use schedule_work()/flush_scheduled_work() because both
1069 * unregister_netdev() and linkwatch_event take the rtnl lock,
1070 * so flush_scheduled_work() can deadlock during device
1071 * removal.
1072 */
1073 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1074 if (!ipoib_workqueue) {
1075 ret = -ENOMEM;
1076 goto err_fs;
1077 }
1078
1079 ret = ib_register_client(&ipoib_client);
1080 if (ret)
1081 goto err_wq;
1082
1083 return 0;
1084
1da177e4
LT		 1085err_wq:
1086 destroy_workqueue(ipoib_workqueue);
1087
9adec1a8
RD		 1088err_fs:
1089 ipoib_unregister_debugfs();
1090
1da177e4
LT		 1091 return ret;
1092}
1093
1094static void __exit ipoib_cleanup_module(void)
1095{
1da177e4 1096 ib_unregister_client(&ipoib_client);
9adec1a8 1097 ipoib_unregister_debugfs();
1da177e4
LT		 1098 destroy_workqueue(ipoib_workqueue);
1099}
1100
1101module_init(ipoib_init_module);
1102module_exit(ipoib_cleanup_module);
Linux kernel - Deliverables
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