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[INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h
[GitHub/mt8127/android_kernel_alcatel_ttab.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
1da177e4
LT		 39#include <linux/module.h>
40
41#include <linux/init.h>
42#include <linux/slab.h>
43#include <linux/vmalloc.h>
44
45#include <linux/if_arp.h> /* For ARPHRD_xxx */
46
47#include <linux/ip.h>
48#include <linux/in.h>
49
14c85021
ACM		 50#include <net/dst.h>
51
1da177e4
LT		 52MODULE_AUTHOR("Roland Dreier");
53MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
54MODULE_LICENSE("Dual BSD/GPL");
55
56#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
57int ipoib_debug_level;
58
59module_param_named(debug_level, ipoib_debug_level, int, 0644);
60MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
61#endif
62
1732b0ef
RD		 63struct ipoib_path_iter {
64 struct net_device *dev;
65 struct ipoib_path path;
66};
67
1da177e4
LT		 68static const u8 ipv4_bcast_addr[] = {
69 0x00, 0xff, 0xff, 0xff,
70 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
71 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
72};
73
74struct workqueue_struct *ipoib_workqueue;
75
76static void ipoib_add_one(struct ib_device *device);
77static void ipoib_remove_one(struct ib_device *device);
78
79static struct ib_client ipoib_client = {
80 .name = "ipoib",
81 .add = ipoib_add_one,
82 .remove = ipoib_remove_one
83};
84
85int ipoib_open(struct net_device *dev)
86{
87 struct ipoib_dev_priv *priv = netdev_priv(dev);
88
89 ipoib_dbg(priv, "bringing up interface\n");
90
91 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
92
93 if (ipoib_pkey_dev_delay_open(dev))
94 return 0;
95
96 if (ipoib_ib_dev_open(dev))
97 return -EINVAL;
98
267ee88e
RD		 99 if (ipoib_ib_dev_up(dev)) {
100 ipoib_ib_dev_stop(dev);
1da177e4 101 return -EINVAL;
267ee88e 102 }
1da177e4
LT		 103
104 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
105 struct ipoib_dev_priv *cpriv;
106
107 /* Bring up any child interfaces too */
108 down(&priv->vlan_mutex);
109 list_for_each_entry(cpriv, &priv->child_intfs, list) {
110 int flags;
111
112 flags = cpriv->dev->flags;
113 if (flags & IFF_UP)
114 continue;
115
116 dev_change_flags(cpriv->dev, flags | IFF_UP);
117 }
118 up(&priv->vlan_mutex);
119 }
120
121 netif_start_queue(dev);
122
123 return 0;
124}
125
126static int ipoib_stop(struct net_device *dev)
127{
128 struct ipoib_dev_priv *priv = netdev_priv(dev);
129
130 ipoib_dbg(priv, "stopping interface\n");
131
132 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
133
134 netif_stop_queue(dev);
135
136 ipoib_ib_dev_down(dev);
137 ipoib_ib_dev_stop(dev);
138
139 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
140 struct ipoib_dev_priv *cpriv;
141
142 /* Bring down any child interfaces too */
143 down(&priv->vlan_mutex);
144 list_for_each_entry(cpriv, &priv->child_intfs, list) {
145 int flags;
146
147 flags = cpriv->dev->flags;
148 if (!(flags & IFF_UP))
149 continue;
150
151 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
152 }
153 up(&priv->vlan_mutex);
154 }
155
156 return 0;
157}
158
159static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
160{
161 struct ipoib_dev_priv *priv = netdev_priv(dev);
162
163 if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN)
164 return -EINVAL;
165
166 priv->admin_mtu = new_mtu;
167
168 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
169
170 return 0;
171}
172
173static struct ipoib_path *__path_find(struct net_device *dev,
174 union ib_gid *gid)
175{
176 struct ipoib_dev_priv *priv = netdev_priv(dev);
177 struct rb_node *n = priv->path_tree.rb_node;
178 struct ipoib_path *path;
179 int ret;
180
181 while (n) {
182 path = rb_entry(n, struct ipoib_path, rb_node);
183
184 ret = memcmp(gid->raw, path->pathrec.dgid.raw,
185 sizeof (union ib_gid));
186
187 if (ret < 0)
188 n = n->rb_left;
189 else if (ret > 0)
190 n = n->rb_right;
191 else
192 return path;
193 }
194
195 return NULL;
196}
197
198static int __path_add(struct net_device *dev, struct ipoib_path *path)
199{
200 struct ipoib_dev_priv *priv = netdev_priv(dev);
201 struct rb_node **n = &priv->path_tree.rb_node;
202 struct rb_node *pn = NULL;
203 struct ipoib_path *tpath;
204 int ret;
205
206 while (*n) {
207 pn = *n;
208 tpath = rb_entry(pn, struct ipoib_path, rb_node);
209
210 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
211 sizeof (union ib_gid));
212 if (ret < 0)
213 n = &pn->rb_left;
214 else if (ret > 0)
215 n = &pn->rb_right;
216 else
217 return -EEXIST;
218 }
219
220 rb_link_node(&path->rb_node, pn, n);
221 rb_insert_color(&path->rb_node, &priv->path_tree);
222
223 list_add_tail(&path->list, &priv->path_list);
224
225 return 0;
226}
227
228static void path_free(struct net_device *dev, struct ipoib_path *path)
229{
230 struct ipoib_dev_priv *priv = netdev_priv(dev);
231 struct ipoib_neigh *neigh, *tn;
232 struct sk_buff *skb;
233 unsigned long flags;
234
235 while ((skb = __skb_dequeue(&path->queue)))
236 dev_kfree_skb_irq(skb);
237
238 spin_lock_irqsave(&priv->lock, flags);
239
240 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
241 /*
242 * It's safe to call ipoib_put_ah() inside priv->lock
243 * here, because we know that path->ah will always
244 * hold one more reference, so ipoib_put_ah() will
245 * never do more than decrement the ref count.
246 */
247 if (neigh->ah)
248 ipoib_put_ah(neigh->ah);
249 *to_ipoib_neigh(neigh->neighbour) = NULL;
250 neigh->neighbour->ops->destructor = NULL;
251 kfree(neigh);
252 }
253
254 spin_unlock_irqrestore(&priv->lock, flags);
255
256 if (path->ah)
257 ipoib_put_ah(path->ah);
258
259 kfree(path);
260}
261
1732b0ef
RD		 262#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
263
264struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
265{
266 struct ipoib_path_iter *iter;
267
268 iter = kmalloc(sizeof *iter, GFP_KERNEL);
269 if (!iter)
270 return NULL;
271
272 iter->dev = dev;
273 memset(iter->path.pathrec.dgid.raw, 0, 16);
274
275 if (ipoib_path_iter_next(iter)) {
276 kfree(iter);
277 return NULL;
278 }
279
280 return iter;
281}
282
283int ipoib_path_iter_next(struct ipoib_path_iter *iter)
284{
285 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
286 struct rb_node *n;
287 struct ipoib_path *path;
288 int ret = 1;
289
290 spin_lock_irq(&priv->lock);
291
292 n = rb_first(&priv->path_tree);
293
294 while (n) {
295 path = rb_entry(n, struct ipoib_path, rb_node);
296
297 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
298 sizeof (union ib_gid)) < 0) {
299 iter->path = *path;
300 ret = 0;
301 break;
302 }
303
304 n = rb_next(n);
305 }
306
307 spin_unlock_irq(&priv->lock);
308
309 return ret;
310}
311
312void ipoib_path_iter_read(struct ipoib_path_iter *iter,
313 struct ipoib_path *path)
314{
315 *path = iter->path;
316}
317
318#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
319
1da177e4
LT		 320void ipoib_flush_paths(struct net_device *dev)
321{
322 struct ipoib_dev_priv *priv = netdev_priv(dev);
323 struct ipoib_path *path, *tp;
324 LIST_HEAD(remove_list);
325 unsigned long flags;
326
327 spin_lock_irqsave(&priv->lock, flags);
328
329 list_splice(&priv->path_list, &remove_list);
330 INIT_LIST_HEAD(&priv->path_list);
331
332 list_for_each_entry(path, &remove_list, list)
333 rb_erase(&path->rb_node, &priv->path_tree);
334
335 spin_unlock_irqrestore(&priv->lock, flags);
336
337 list_for_each_entry_safe(path, tp, &remove_list, list) {
338 if (path->query)
339 ib_sa_cancel_query(path->query_id, path->query);
340 wait_for_completion(&path->done);
341 path_free(dev, path);
342 }
343}
344
345static void path_rec_completion(int status,
346 struct ib_sa_path_rec *pathrec,
347 void *path_ptr)
348{
349 struct ipoib_path *path = path_ptr;
350 struct net_device *dev = path->dev;
351 struct ipoib_dev_priv *priv = netdev_priv(dev);
352 struct ipoib_ah *ah = NULL;
353 struct ipoib_neigh *neigh;
354 struct sk_buff_head skqueue;
355 struct sk_buff *skb;
356 unsigned long flags;
357
358 if (pathrec)
359 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
360 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
361 else
362 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
363 status, IPOIB_GID_ARG(path->pathrec.dgid));
364
365 skb_queue_head_init(&skqueue);
366
367 if (!status) {
368 struct ib_ah_attr av = {
369 .dlid = be16_to_cpu(pathrec->dlid),
370 .sl = pathrec->sl,
371 .port_num = priv->port
372 };
e6ded99c 373 int path_rate = ib_sa_rate_enum_to_int(pathrec->rate);
1da177e4 374
e6ded99c
RD		 375 if (path_rate > 0 && priv->local_rate > path_rate)
376 av.static_rate = (priv->local_rate - 1) / path_rate;
1da177e4
LT		 377
378 ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n",
379 av.static_rate, priv->local_rate,
380 ib_sa_rate_enum_to_int(pathrec->rate));
381
382 ah = ipoib_create_ah(dev, priv->pd, &av);
383 }
384
385 spin_lock_irqsave(&priv->lock, flags);
386
387 path->ah = ah;
388
389 if (ah) {
390 path->pathrec = *pathrec;
391
392 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
393 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
394
395 while ((skb = __skb_dequeue(&path->queue)))
396 __skb_queue_tail(&skqueue, skb);
397
398 list_for_each_entry(neigh, &path->neigh_list, list) {
399 kref_get(&path->ah->ref);
400 neigh->ah = path->ah;
401
402 while ((skb = __skb_dequeue(&neigh->queue)))
403 __skb_queue_tail(&skqueue, skb);
404 }
5872a9fc 405 }
1da177e4 406
5872a9fc 407 path->query = NULL;
1da177e4
LT		 408 complete(&path->done);
409
410 spin_unlock_irqrestore(&priv->lock, flags);
411
412 while ((skb = __skb_dequeue(&skqueue))) {
413 skb->dev = dev;
414 if (dev_queue_xmit(skb))
415 ipoib_warn(priv, "dev_queue_xmit failed "
416 "to requeue packet\n");
417 }
418}
419
420static struct ipoib_path *path_rec_create(struct net_device *dev,
421 union ib_gid *gid)
422{
423 struct ipoib_dev_priv *priv = netdev_priv(dev);
424 struct ipoib_path *path;
425
21a38489 426 path = kzalloc(sizeof *path, GFP_ATOMIC);
1da177e4
LT		 427 if (!path)
428 return NULL;
429
21a38489 430 path->dev = dev;
1da177e4
LT		 431
432 skb_queue_head_init(&path->queue);
433
434 INIT_LIST_HEAD(&path->neigh_list);
1da177e4
LT		 435
436 memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid));
437 path->pathrec.sgid = priv->local_gid;
438 path->pathrec.pkey = cpu_to_be16(priv->pkey);
439 path->pathrec.numb_path = 1;
440
441 return path;
442}
443
444static int path_rec_start(struct net_device *dev,
445 struct ipoib_path *path)
446{
447 struct ipoib_dev_priv *priv = netdev_priv(dev);
448
449 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
450 IPOIB_GID_ARG(path->pathrec.dgid));
451
65c7edda
RD		 452 init_completion(&path->done);
453
1da177e4
LT		 454 path->query_id =
455 ib_sa_path_rec_get(priv->ca, priv->port,
456 &path->pathrec,
457 IB_SA_PATH_REC_DGID |
458 IB_SA_PATH_REC_SGID |
459 IB_SA_PATH_REC_NUMB_PATH |
460 IB_SA_PATH_REC_PKEY,
461 1000, GFP_ATOMIC,
462 path_rec_completion,
463 path, &path->query);
464 if (path->query_id < 0) {
465 ipoib_warn(priv, "ib_sa_path_rec_get failed\n");
466 path->query = NULL;
467 return path->query_id;
468 }
469
470 return 0;
471}
472
473static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
474{
475 struct ipoib_dev_priv *priv = netdev_priv(dev);
476 struct ipoib_path *path;
477 struct ipoib_neigh *neigh;
478
479 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
480 if (!neigh) {
481 ++priv->stats.tx_dropped;
482 dev_kfree_skb_any(skb);
483 return;
484 }
485
486 skb_queue_head_init(&neigh->queue);
487 neigh->neighbour = skb->dst->neighbour;
488 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
489
490 /*
491 * We can only be called from ipoib_start_xmit, so we're
492 * inside tx_lock -- no need to save/restore flags.
493 */
494 spin_lock(&priv->lock);
495
496 path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4));
497 if (!path) {
498 path = path_rec_create(dev,
499 (union ib_gid *) (skb->dst->neighbour->ha + 4));
500 if (!path)
501 goto err;
502
503 __path_add(dev, path);
504 }
505
506 list_add_tail(&neigh->list, &path->neigh_list);
507
508 if (path->pathrec.dlid) {
509 kref_get(&path->ah->ref);
510 neigh->ah = path->ah;
511
512 ipoib_send(dev, skb, path->ah,
513 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
514 } else {
515 neigh->ah = NULL;
516 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
517 __skb_queue_tail(&neigh->queue, skb);
518 } else {
519 ++priv->stats.tx_dropped;
520 dev_kfree_skb_any(skb);
521 }
522
523 if (!path->query && path_rec_start(dev, path))
524 goto err;
525 }
526
527 spin_unlock(&priv->lock);
528 return;
529
530err:
531 *to_ipoib_neigh(skb->dst->neighbour) = NULL;
532 list_del(&neigh->list);
533 neigh->neighbour->ops->destructor = NULL;
534 kfree(neigh);
535
536 ++priv->stats.tx_dropped;
537 dev_kfree_skb_any(skb);
538
539 spin_unlock(&priv->lock);
540}
541
d70ed607 542static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
1da177e4
LT		 543{
544 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
545
546 /* Look up path record for unicasts */
547 if (skb->dst->neighbour->ha[4] != 0xff) {
548 neigh_add_path(skb, dev);
549 return;
550 }
551
552 /* Add in the P_Key for multicasts */
553 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
554 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
555 ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb);
556}
557
558static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
559 struct ipoib_pseudoheader *phdr)
560{
561 struct ipoib_dev_priv *priv = netdev_priv(dev);
562 struct ipoib_path *path;
563
564 /*
565 * We can only be called from ipoib_start_xmit, so we're
566 * inside tx_lock -- no need to save/restore flags.
567 */
568 spin_lock(&priv->lock);
569
570 path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4));
571 if (!path) {
572 path = path_rec_create(dev,
573 (union ib_gid *) (phdr->hwaddr + 4));
574 if (path) {
575 /* put pseudoheader back on for next time */
576 skb_push(skb, sizeof *phdr);
577 __skb_queue_tail(&path->queue, skb);
578
579 if (path_rec_start(dev, path)) {
580 spin_unlock(&priv->lock);
581 path_free(dev, path);
582 return;
583 } else
584 __path_add(dev, path);
585 } else {
586 ++priv->stats.tx_dropped;
587 dev_kfree_skb_any(skb);
588 }
589
590 spin_unlock(&priv->lock);
591 return;
592 }
593
594 if (path->pathrec.dlid) {
595 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
596 be16_to_cpu(path->pathrec.dlid));
597
598 ipoib_send(dev, skb, path->ah,
599 be32_to_cpup((__be32 *) phdr->hwaddr));
600 } else if ((path->query || !path_rec_start(dev, path)) &&
601 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
602 /* put pseudoheader back on for next time */
603 skb_push(skb, sizeof *phdr);
604 __skb_queue_tail(&path->queue, skb);
605 } else {
606 ++priv->stats.tx_dropped;
607 dev_kfree_skb_any(skb);
608 }
609
610 spin_unlock(&priv->lock);
611}
612
613static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
614{
615 struct ipoib_dev_priv *priv = netdev_priv(dev);
616 struct ipoib_neigh *neigh;
617 unsigned long flags;
618
a20583a7 619 if (!spin_trylock_irqsave(&priv->tx_lock, flags))
1da177e4 620 return NETDEV_TX_LOCKED;
1da177e4
LT		 621
622 /*
623 * Check if our queue is stopped. Since we have the LLTX bit
624 * set, we can't rely on netif_stop_queue() preventing our
625 * xmit function from being called with a full queue.
626 */
627 if (unlikely(netif_queue_stopped(dev))) {
628 spin_unlock_irqrestore(&priv->tx_lock, flags);
629 return NETDEV_TX_BUSY;
630 }
631
632 if (skb->dst && skb->dst->neighbour) {
633 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
d70ed607 634 ipoib_path_lookup(skb, dev);
1da177e4
LT		 635 goto out;
636 }
637
638 neigh = *to_ipoib_neigh(skb->dst->neighbour);
639
640 if (likely(neigh->ah)) {
641 ipoib_send(dev, skb, neigh->ah,
642 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
643 goto out;
644 }
645
646 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
647 spin_lock(&priv->lock);
648 __skb_queue_tail(&neigh->queue, skb);
649 spin_unlock(&priv->lock);
650 } else {
651 ++priv->stats.tx_dropped;
652 dev_kfree_skb_any(skb);
653 }
654 } else {
655 struct ipoib_pseudoheader *phdr =
656 (struct ipoib_pseudoheader *) skb->data;
657 skb_pull(skb, sizeof *phdr);
658
659 if (phdr->hwaddr[4] == 0xff) {
660 /* Add in the P_Key for multicast*/
661 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
662 phdr->hwaddr[9] = priv->pkey & 0xff;
663
664 ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb);
665 } else {
0dca0f7b 666 /* unicast GID -- should be ARP or RARP reply */
1da177e4 667
0dca0f7b
HR		 668 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
669 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
1da177e4
LT		 670 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
671 IPOIB_GID_FMT "\n",
672 skb->dst ? "neigh" : "dst",
97f52eb4
SH		 673 be16_to_cpup((__be16 *) skb->data),
674 be32_to_cpup((__be32 *) phdr->hwaddr),
1da177e4
LT		 675 IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4)));
676 dev_kfree_skb_any(skb);
677 ++priv->stats.tx_dropped;
678 goto out;
679 }
680
681 unicast_arp_send(skb, dev, phdr);
682 }
683 }
684
685out:
686 spin_unlock_irqrestore(&priv->tx_lock, flags);
687
688 return NETDEV_TX_OK;
689}
690
691static struct net_device_stats *ipoib_get_stats(struct net_device *dev)
692{
693 struct ipoib_dev_priv *priv = netdev_priv(dev);
694
695 return &priv->stats;
696}
697
698static void ipoib_timeout(struct net_device *dev)
699{
700 struct ipoib_dev_priv *priv = netdev_priv(dev);
701
4b2d319b
RD		 702 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
703 jiffies_to_msecs(jiffies - dev->trans_start));
704 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
705 netif_queue_stopped(dev),
706 priv->tx_head, priv->tx_tail);
1da177e4
LT		 707 /* XXX reset QP, etc. */
708}
709
710static int ipoib_hard_header(struct sk_buff *skb,
711 struct net_device *dev,
712 unsigned short type,
713 void *daddr, void *saddr, unsigned len)
714{
715 struct ipoib_header *header;
716
717 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
718
719 header->proto = htons(type);
720 header->reserved = 0;
721
722 /*
723 * If we don't have a neighbour structure, stuff the
724 * destination address onto the front of the skb so we can
725 * figure out where to send the packet later.
726 */
727 if (!skb->dst || !skb->dst->neighbour) {
728 struct ipoib_pseudoheader *phdr =
729 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
730 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
731 }
732
733 return 0;
734}
735
736static void ipoib_set_mcast_list(struct net_device *dev)
737{
738 struct ipoib_dev_priv *priv = netdev_priv(dev);
739
1ad62a19 740 queue_work(ipoib_workqueue, &priv->restart_task);
1da177e4
LT		 741}
742
743static void ipoib_neigh_destructor(struct neighbour *n)
744{
745 struct ipoib_neigh *neigh;
746 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
747 unsigned long flags;
748 struct ipoib_ah *ah = NULL;
749
750 ipoib_dbg(priv,
751 "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
752 be32_to_cpup((__be32 *) n->ha),
753 IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4))));
754
755 spin_lock_irqsave(&priv->lock, flags);
756
757 neigh = *to_ipoib_neigh(n);
758 if (neigh) {
759 if (neigh->ah)
760 ah = neigh->ah;
761 list_del(&neigh->list);
762 *to_ipoib_neigh(n) = NULL;
763 kfree(neigh);
764 }
765
766 spin_unlock_irqrestore(&priv->lock, flags);
767
768 if (ah)
769 ipoib_put_ah(ah);
770}
771
772static int ipoib_neigh_setup(struct neighbour *neigh)
773{
774 /*
775 * Is this kosher? I can't find anybody in the kernel that
776 * sets neigh->destructor, so we should be able to set it here
777 * without trouble.
778 */
779 neigh->ops->destructor = ipoib_neigh_destructor;
780
781 return 0;
782}
783
784static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
785{
786 parms->neigh_setup = ipoib_neigh_setup;
787
788 return 0;
789}
790
791int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
792{
793 struct ipoib_dev_priv *priv = netdev_priv(dev);
794
795 /* Allocate RX/TX "rings" to hold queued skbs */
796
de6eb66b 797 priv->rx_ring = kzalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_rx_buf),
1da177e4
LT		 798 GFP_KERNEL);
799 if (!priv->rx_ring) {
800 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
801 ca->name, IPOIB_RX_RING_SIZE);
802 goto out;
803 }
1da177e4 804
de6eb66b 805 priv->tx_ring = kzalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_tx_buf),
1da177e4
LT		 806 GFP_KERNEL);
807 if (!priv->tx_ring) {
808 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
809 ca->name, IPOIB_TX_RING_SIZE);
810 goto out_rx_ring_cleanup;
811 }
1da177e4
LT		 812
813 /* priv->tx_head & tx_tail are already 0 */
814
815 if (ipoib_ib_dev_init(dev, ca, port))
816 goto out_tx_ring_cleanup;
817
818 return 0;
819
820out_tx_ring_cleanup:
821 kfree(priv->tx_ring);
822
823out_rx_ring_cleanup:
824 kfree(priv->rx_ring);
825
826out:
827 return -ENOMEM;
828}
829
830void ipoib_dev_cleanup(struct net_device *dev)
831{
832 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
833
1732b0ef 834 ipoib_delete_debug_files(dev);
1da177e4
LT		 835
836 /* Delete any child interfaces first */
837 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
838 unregister_netdev(cpriv->dev);
839 ipoib_dev_cleanup(cpriv->dev);
840 free_netdev(cpriv->dev);
841 }
842
843 ipoib_ib_dev_cleanup(dev);
844
92a6b34b
HR		 845 kfree(priv->rx_ring);
846 kfree(priv->tx_ring);
1da177e4 847
92a6b34b
HR		 848 priv->rx_ring = NULL;
849 priv->tx_ring = NULL;
1da177e4
LT		 850}
851
852static void ipoib_setup(struct net_device *dev)
853{
854 struct ipoib_dev_priv *priv = netdev_priv(dev);
855
856 dev->open = ipoib_open;
857 dev->stop = ipoib_stop;
858 dev->change_mtu = ipoib_change_mtu;
859 dev->hard_start_xmit = ipoib_start_xmit;
860 dev->get_stats = ipoib_get_stats;
861 dev->tx_timeout = ipoib_timeout;
862 dev->hard_header = ipoib_hard_header;
863 dev->set_multicast_list = ipoib_set_mcast_list;
864 dev->neigh_setup = ipoib_neigh_setup_dev;
865
866 dev->watchdog_timeo = HZ;
867
1da177e4
LT		 868 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
869
870 /*
871 * We add in INFINIBAND_ALEN to allow for the destination
872 * address "pseudoheader" for skbs without neighbour struct.
873 */
874 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
875 dev->addr_len = INFINIBAND_ALEN;
876 dev->type = ARPHRD_INFINIBAND;
877 dev->tx_queue_len = IPOIB_TX_RING_SIZE * 2;
878 dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
879
880 /* MTU will be reset when mcast join happens */
881 dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN;
882 priv->mcast_mtu = priv->admin_mtu = dev->mtu;
883
884 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
885
886 netif_carrier_off(dev);
887
888 SET_MODULE_OWNER(dev);
889
890 priv->dev = dev;
891
892 spin_lock_init(&priv->lock);
893 spin_lock_init(&priv->tx_lock);
894
895 init_MUTEX(&priv->mcast_mutex);
896 init_MUTEX(&priv->vlan_mutex);
897
898 INIT_LIST_HEAD(&priv->path_list);
899 INIT_LIST_HEAD(&priv->child_intfs);
900 INIT_LIST_HEAD(&priv->dead_ahs);
901 INIT_LIST_HEAD(&priv->multicast_list);
902
903 INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev);
904 INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev);
905 INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev);
906 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev);
907 INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev);
908}
909
910struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
911{
912 struct net_device *dev;
913
914 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
915 ipoib_setup);
916 if (!dev)
917 return NULL;
918
919 return netdev_priv(dev);
920}
921
922static ssize_t show_pkey(struct class_device *cdev, char *buf)
923{
924 struct ipoib_dev_priv *priv =
925 netdev_priv(container_of(cdev, struct net_device, class_dev));
926
927 return sprintf(buf, "0x%04x\n", priv->pkey);
928}
929static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
930
931static ssize_t create_child(struct class_device *cdev,
932 const char *buf, size_t count)
933{
934 int pkey;
935 int ret;
936
937 if (sscanf(buf, "%i", &pkey) != 1)
938 return -EINVAL;
939
940 if (pkey < 0 || pkey > 0xffff)
941 return -EINVAL;
942
4ce05937
RD		 943 /*
944 * Set the full membership bit, so that we join the right
945 * broadcast group, etc.
946 */
947 pkey |= 0x8000;
948
1da177e4
LT		 949 ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev),
950 pkey);
951
952 return ret ? ret : count;
953}
954static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
955
956static ssize_t delete_child(struct class_device *cdev,
957 const char *buf, size_t count)
958{
959 int pkey;
960 int ret;
961
962 if (sscanf(buf, "%i", &pkey) != 1)
963 return -EINVAL;
964
965 if (pkey < 0 || pkey > 0xffff)
966 return -EINVAL;
967
968 ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev),
969 pkey);
970
971 return ret ? ret : count;
972
973}
974static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
975
976int ipoib_add_pkey_attr(struct net_device *dev)
977{
978 return class_device_create_file(&dev->class_dev,
979 &class_device_attr_pkey);
980}
981
982static struct net_device *ipoib_add_port(const char *format,
983 struct ib_device *hca, u8 port)
984{
985 struct ipoib_dev_priv *priv;
986 int result = -ENOMEM;
987
988 priv = ipoib_intf_alloc(format);
989 if (!priv)
990 goto alloc_mem_failed;
991
992 SET_NETDEV_DEV(priv->dev, hca->dma_device);
993
994 result = ib_query_pkey(hca, port, 0, &priv->pkey);
995 if (result) {
996 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
997 hca->name, port, result);
998 goto alloc_mem_failed;
999 }
1000
4ce05937
RD		 1001 /*
1002 * Set the full membership bit, so that we join the right
1003 * broadcast group, etc.
1004 */
1005 priv->pkey |= 0x8000;
1006
1da177e4
LT		 1007 priv->dev->broadcast[8] = priv->pkey >> 8;
1008 priv->dev->broadcast[9] = priv->pkey & 0xff;
1009
1010 result = ib_query_gid(hca, port, 0, &priv->local_gid);
1011 if (result) {
1012 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1013 hca->name, port, result);
1014 goto alloc_mem_failed;
1015 } else
1016 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
1017
1018
1019 result = ipoib_dev_init(priv->dev, hca, port);
1020 if (result < 0) {
1021 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1022 hca->name, port, result);
1023 goto device_init_failed;
1024 }
1025
1026 INIT_IB_EVENT_HANDLER(&priv->event_handler,
1027 priv->ca, ipoib_event);
1028 result = ib_register_event_handler(&priv->event_handler);
1029 if (result < 0) {
1030 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1031 "port %d (ret = %d)\n",
1032 hca->name, port, result);
1033 goto event_failed;
1034 }
1035
1036 result = register_netdev(priv->dev);
1037 if (result) {
1038 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1039 hca->name, port, result);
1040 goto register_failed;
1041 }
1042
1732b0ef 1043 ipoib_create_debug_files(priv->dev);
1da177e4
LT		 1044
1045 if (ipoib_add_pkey_attr(priv->dev))
1046 goto sysfs_failed;
1047 if (class_device_create_file(&priv->dev->class_dev,
1048 &class_device_attr_create_child))
1049 goto sysfs_failed;
1050 if (class_device_create_file(&priv->dev->class_dev,
1051 &class_device_attr_delete_child))
1052 goto sysfs_failed;
1053
1054 return priv->dev;
1055
1056sysfs_failed:
1732b0ef 1057 ipoib_delete_debug_files(priv->dev);
1da177e4
LT		 1058 unregister_netdev(priv->dev);
1059
1060register_failed:
1061 ib_unregister_event_handler(&priv->event_handler);
51574e03 1062 flush_scheduled_work();
1da177e4
LT		 1063
1064event_failed:
1065 ipoib_dev_cleanup(priv->dev);
1066
1067device_init_failed:
1068 free_netdev(priv->dev);
1069
1070alloc_mem_failed:
1071 return ERR_PTR(result);
1072}
1073
1074static void ipoib_add_one(struct ib_device *device)
1075{
1076 struct list_head *dev_list;
1077 struct net_device *dev;
1078 struct ipoib_dev_priv *priv;
1079 int s, e, p;
1080
1081 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1082 if (!dev_list)
1083 return;
1084
1085 INIT_LIST_HEAD(dev_list);
1086
1087 if (device->node_type == IB_NODE_SWITCH) {
1088 s = 0;
1089 e = 0;
1090 } else {
1091 s = 1;
1092 e = device->phys_port_cnt;
1093 }
1094
1095 for (p = s; p <= e; ++p) {
1096 dev = ipoib_add_port("ib%d", device, p);
1097 if (!IS_ERR(dev)) {
1098 priv = netdev_priv(dev);
1099 list_add_tail(&priv->list, dev_list);
1100 }
1101 }
1102
1103 ib_set_client_data(device, &ipoib_client, dev_list);
1104}
1105
1106static void ipoib_remove_one(struct ib_device *device)
1107{
1108 struct ipoib_dev_priv *priv, *tmp;
1109 struct list_head *dev_list;
1110
1111 dev_list = ib_get_client_data(device, &ipoib_client);
1112
1113 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1114 ib_unregister_event_handler(&priv->event_handler);
51574e03 1115 flush_scheduled_work();
1da177e4
LT		 1116
1117 unregister_netdev(priv->dev);
1118 ipoib_dev_cleanup(priv->dev);
1119 free_netdev(priv->dev);
1120 }
06c56e44
MT		 1121
1122 kfree(dev_list);
1da177e4
LT		 1123}
1124
1125static int __init ipoib_init_module(void)
1126{
1127 int ret;
1128
1129 ret = ipoib_register_debugfs();
1130 if (ret)
1131 return ret;
1132
1133 /*
1134 * We create our own workqueue mainly because we want to be
1135 * able to flush it when devices are being removed. We can't
1136 * use schedule_work()/flush_scheduled_work() because both
1137 * unregister_netdev() and linkwatch_event take the rtnl lock,
1138 * so flush_scheduled_work() can deadlock during device
1139 * removal.
1140 */
1141 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1142 if (!ipoib_workqueue) {
1143 ret = -ENOMEM;
1144 goto err_fs;
1145 }
1146
1147 ret = ib_register_client(&ipoib_client);
1148 if (ret)
1149 goto err_wq;
1150
1151 return 0;
1152
1da177e4
LT		 1153err_wq:
1154 destroy_workqueue(ipoib_workqueue);
1155
9adec1a8
RD		 1156err_fs:
1157 ipoib_unregister_debugfs();
1158
1da177e4
LT		 1159 return ret;
1160}
1161
1162static void __exit ipoib_cleanup_module(void)
1163{
1da177e4 1164 ib_unregister_client(&ipoib_client);
9adec1a8 1165 ipoib_unregister_debugfs();
1da177e4
LT		 1166 destroy_workqueue(ipoib_workqueue);
1167}
1168
1169module_init(ipoib_init_module);
1170module_exit(ipoib_cleanup_module);
kernel source for telekom puls (alcatel/mediatek)