2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
34 * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $
39 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/kernel.h>
45 #include <linux/if_arp.h> /* For ARPHRD_xxx */
52 MODULE_AUTHOR("Roland Dreier");
53 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
54 MODULE_LICENSE("Dual BSD/GPL");
56 int ipoib_sendq_size __read_mostly
= IPOIB_TX_RING_SIZE
;
57 int ipoib_recvq_size __read_mostly
= IPOIB_RX_RING_SIZE
;
59 module_param_named(send_queue_size
, ipoib_sendq_size
, int, 0444);
60 MODULE_PARM_DESC(send_queue_size
, "Number of descriptors in send queue");
61 module_param_named(recv_queue_size
, ipoib_recvq_size
, int, 0444);
62 MODULE_PARM_DESC(recv_queue_size
, "Number of descriptors in receive queue");
64 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
65 int ipoib_debug_level
;
67 module_param_named(debug_level
, ipoib_debug_level
, int, 0644);
68 MODULE_PARM_DESC(debug_level
, "Enable debug tracing if > 0");
71 struct ipoib_path_iter
{
72 struct net_device
*dev
;
73 struct ipoib_path path
;
76 static const u8 ipv4_bcast_addr
[] = {
77 0x00, 0xff, 0xff, 0xff,
78 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
79 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
82 struct workqueue_struct
*ipoib_workqueue
;
84 struct ib_sa_client ipoib_sa_client
;
86 static void ipoib_add_one(struct ib_device
*device
);
87 static void ipoib_remove_one(struct ib_device
*device
);
89 static struct ib_client ipoib_client
= {
92 .remove
= ipoib_remove_one
95 int ipoib_open(struct net_device
*dev
)
97 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
99 ipoib_dbg(priv
, "bringing up interface\n");
101 set_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
103 if (ipoib_pkey_dev_delay_open(dev
))
106 if (ipoib_ib_dev_open(dev
))
109 if (ipoib_ib_dev_up(dev
)) {
110 ipoib_ib_dev_stop(dev
);
114 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
115 struct ipoib_dev_priv
*cpriv
;
117 /* Bring up any child interfaces too */
118 mutex_lock(&priv
->vlan_mutex
);
119 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
122 flags
= cpriv
->dev
->flags
;
126 dev_change_flags(cpriv
->dev
, flags
| IFF_UP
);
128 mutex_unlock(&priv
->vlan_mutex
);
131 netif_start_queue(dev
);
136 static int ipoib_stop(struct net_device
*dev
)
138 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
140 ipoib_dbg(priv
, "stopping interface\n");
142 clear_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
144 netif_stop_queue(dev
);
147 * Now flush workqueue to make sure a scheduled task doesn't
148 * bring our internal state back up.
150 flush_workqueue(ipoib_workqueue
);
152 ipoib_ib_dev_down(dev
, 1);
153 ipoib_ib_dev_stop(dev
);
155 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
156 struct ipoib_dev_priv
*cpriv
;
158 /* Bring down any child interfaces too */
159 mutex_lock(&priv
->vlan_mutex
);
160 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
163 flags
= cpriv
->dev
->flags
;
164 if (!(flags
& IFF_UP
))
167 dev_change_flags(cpriv
->dev
, flags
& ~IFF_UP
);
169 mutex_unlock(&priv
->vlan_mutex
);
175 static int ipoib_change_mtu(struct net_device
*dev
, int new_mtu
)
177 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
179 if (new_mtu
> IPOIB_PACKET_SIZE
- IPOIB_ENCAP_LEN
)
182 priv
->admin_mtu
= new_mtu
;
184 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
189 static struct ipoib_path
*__path_find(struct net_device
*dev
, void *gid
)
191 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
192 struct rb_node
*n
= priv
->path_tree
.rb_node
;
193 struct ipoib_path
*path
;
197 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
199 ret
= memcmp(gid
, path
->pathrec
.dgid
.raw
,
200 sizeof (union ib_gid
));
213 static int __path_add(struct net_device
*dev
, struct ipoib_path
*path
)
215 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
216 struct rb_node
**n
= &priv
->path_tree
.rb_node
;
217 struct rb_node
*pn
= NULL
;
218 struct ipoib_path
*tpath
;
223 tpath
= rb_entry(pn
, struct ipoib_path
, rb_node
);
225 ret
= memcmp(path
->pathrec
.dgid
.raw
, tpath
->pathrec
.dgid
.raw
,
226 sizeof (union ib_gid
));
235 rb_link_node(&path
->rb_node
, pn
, n
);
236 rb_insert_color(&path
->rb_node
, &priv
->path_tree
);
238 list_add_tail(&path
->list
, &priv
->path_list
);
243 static void path_free(struct net_device
*dev
, struct ipoib_path
*path
)
245 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
246 struct ipoib_neigh
*neigh
, *tn
;
250 while ((skb
= __skb_dequeue(&path
->queue
)))
251 dev_kfree_skb_irq(skb
);
253 spin_lock_irqsave(&priv
->lock
, flags
);
255 list_for_each_entry_safe(neigh
, tn
, &path
->neigh_list
, list
) {
257 * It's safe to call ipoib_put_ah() inside priv->lock
258 * here, because we know that path->ah will always
259 * hold one more reference, so ipoib_put_ah() will
260 * never do more than decrement the ref count.
263 ipoib_put_ah(neigh
->ah
);
265 ipoib_neigh_free(neigh
);
268 spin_unlock_irqrestore(&priv
->lock
, flags
);
271 ipoib_put_ah(path
->ah
);
276 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
278 struct ipoib_path_iter
*ipoib_path_iter_init(struct net_device
*dev
)
280 struct ipoib_path_iter
*iter
;
282 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
287 memset(iter
->path
.pathrec
.dgid
.raw
, 0, 16);
289 if (ipoib_path_iter_next(iter
)) {
297 int ipoib_path_iter_next(struct ipoib_path_iter
*iter
)
299 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
301 struct ipoib_path
*path
;
304 spin_lock_irq(&priv
->lock
);
306 n
= rb_first(&priv
->path_tree
);
309 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
311 if (memcmp(iter
->path
.pathrec
.dgid
.raw
, path
->pathrec
.dgid
.raw
,
312 sizeof (union ib_gid
)) < 0) {
321 spin_unlock_irq(&priv
->lock
);
326 void ipoib_path_iter_read(struct ipoib_path_iter
*iter
,
327 struct ipoib_path
*path
)
332 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
334 void ipoib_flush_paths(struct net_device
*dev
)
336 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
337 struct ipoib_path
*path
, *tp
;
338 LIST_HEAD(remove_list
);
340 spin_lock_irq(&priv
->tx_lock
);
341 spin_lock(&priv
->lock
);
343 list_splice(&priv
->path_list
, &remove_list
);
344 INIT_LIST_HEAD(&priv
->path_list
);
346 list_for_each_entry(path
, &remove_list
, list
)
347 rb_erase(&path
->rb_node
, &priv
->path_tree
);
349 list_for_each_entry_safe(path
, tp
, &remove_list
, list
) {
351 ib_sa_cancel_query(path
->query_id
, path
->query
);
352 spin_unlock(&priv
->lock
);
353 spin_unlock_irq(&priv
->tx_lock
);
354 wait_for_completion(&path
->done
);
355 path_free(dev
, path
);
356 spin_lock_irq(&priv
->tx_lock
);
357 spin_lock(&priv
->lock
);
359 spin_unlock(&priv
->lock
);
360 spin_unlock_irq(&priv
->tx_lock
);
363 static void path_rec_completion(int status
,
364 struct ib_sa_path_rec
*pathrec
,
367 struct ipoib_path
*path
= path_ptr
;
368 struct net_device
*dev
= path
->dev
;
369 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
370 struct ipoib_ah
*ah
= NULL
;
371 struct ipoib_neigh
*neigh
;
372 struct sk_buff_head skqueue
;
377 ipoib_dbg(priv
, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT
"\n",
378 be16_to_cpu(pathrec
->dlid
), IPOIB_GID_ARG(pathrec
->dgid
));
380 ipoib_dbg(priv
, "PathRec status %d for GID " IPOIB_GID_FMT
"\n",
381 status
, IPOIB_GID_ARG(path
->pathrec
.dgid
));
383 skb_queue_head_init(&skqueue
);
386 struct ib_ah_attr av
= {
387 .dlid
= be16_to_cpu(pathrec
->dlid
),
389 .port_num
= priv
->port
,
390 .static_rate
= pathrec
->rate
393 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
396 spin_lock_irqsave(&priv
->lock
, flags
);
401 path
->pathrec
= *pathrec
;
403 ipoib_dbg(priv
, "created address handle %p for LID 0x%04x, SL %d\n",
404 ah
, be16_to_cpu(pathrec
->dlid
), pathrec
->sl
);
406 while ((skb
= __skb_dequeue(&path
->queue
)))
407 __skb_queue_tail(&skqueue
, skb
);
409 list_for_each_entry(neigh
, &path
->neigh_list
, list
) {
410 kref_get(&path
->ah
->ref
);
411 neigh
->ah
= path
->ah
;
412 memcpy(&neigh
->dgid
.raw
, &path
->pathrec
.dgid
.raw
,
413 sizeof(union ib_gid
));
415 while ((skb
= __skb_dequeue(&neigh
->queue
)))
416 __skb_queue_tail(&skqueue
, skb
);
421 complete(&path
->done
);
423 spin_unlock_irqrestore(&priv
->lock
, flags
);
425 while ((skb
= __skb_dequeue(&skqueue
))) {
427 if (dev_queue_xmit(skb
))
428 ipoib_warn(priv
, "dev_queue_xmit failed "
429 "to requeue packet\n");
433 static struct ipoib_path
*path_rec_create(struct net_device
*dev
, void *gid
)
435 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
436 struct ipoib_path
*path
;
438 path
= kzalloc(sizeof *path
, GFP_ATOMIC
);
444 skb_queue_head_init(&path
->queue
);
446 INIT_LIST_HEAD(&path
->neigh_list
);
448 memcpy(path
->pathrec
.dgid
.raw
, gid
, sizeof (union ib_gid
));
449 path
->pathrec
.sgid
= priv
->local_gid
;
450 path
->pathrec
.pkey
= cpu_to_be16(priv
->pkey
);
451 path
->pathrec
.numb_path
= 1;
456 static int path_rec_start(struct net_device
*dev
,
457 struct ipoib_path
*path
)
459 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
461 ipoib_dbg(priv
, "Start path record lookup for " IPOIB_GID_FMT
"\n",
462 IPOIB_GID_ARG(path
->pathrec
.dgid
));
464 init_completion(&path
->done
);
467 ib_sa_path_rec_get(&ipoib_sa_client
, priv
->ca
, priv
->port
,
469 IB_SA_PATH_REC_DGID
|
470 IB_SA_PATH_REC_SGID
|
471 IB_SA_PATH_REC_NUMB_PATH
|
476 if (path
->query_id
< 0) {
477 ipoib_warn(priv
, "ib_sa_path_rec_get failed\n");
479 return path
->query_id
;
485 static void neigh_add_path(struct sk_buff
*skb
, struct net_device
*dev
)
487 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
488 struct ipoib_path
*path
;
489 struct ipoib_neigh
*neigh
;
491 neigh
= ipoib_neigh_alloc(skb
->dst
->neighbour
);
493 ++priv
->stats
.tx_dropped
;
494 dev_kfree_skb_any(skb
);
498 skb_queue_head_init(&neigh
->queue
);
501 * We can only be called from ipoib_start_xmit, so we're
502 * inside tx_lock -- no need to save/restore flags.
504 spin_lock(&priv
->lock
);
506 path
= __path_find(dev
, skb
->dst
->neighbour
->ha
+ 4);
508 path
= path_rec_create(dev
, skb
->dst
->neighbour
->ha
+ 4);
512 __path_add(dev
, path
);
515 list_add_tail(&neigh
->list
, &path
->neigh_list
);
518 kref_get(&path
->ah
->ref
);
519 neigh
->ah
= path
->ah
;
520 memcpy(&neigh
->dgid
.raw
, &path
->pathrec
.dgid
.raw
,
521 sizeof(union ib_gid
));
523 ipoib_send(dev
, skb
, path
->ah
,
524 be32_to_cpup((__be32
*) skb
->dst
->neighbour
->ha
));
527 __skb_queue_tail(&neigh
->queue
, skb
);
529 if (!path
->query
&& path_rec_start(dev
, path
))
533 spin_unlock(&priv
->lock
);
537 list_del(&neigh
->list
);
540 ipoib_neigh_free(neigh
);
541 ++priv
->stats
.tx_dropped
;
542 dev_kfree_skb_any(skb
);
544 spin_unlock(&priv
->lock
);
547 static void ipoib_path_lookup(struct sk_buff
*skb
, struct net_device
*dev
)
549 struct ipoib_dev_priv
*priv
= netdev_priv(skb
->dev
);
551 /* Look up path record for unicasts */
552 if (skb
->dst
->neighbour
->ha
[4] != 0xff) {
553 neigh_add_path(skb
, dev
);
557 /* Add in the P_Key for multicasts */
558 skb
->dst
->neighbour
->ha
[8] = (priv
->pkey
>> 8) & 0xff;
559 skb
->dst
->neighbour
->ha
[9] = priv
->pkey
& 0xff;
560 ipoib_mcast_send(dev
, skb
->dst
->neighbour
->ha
+ 4, skb
);
563 static void unicast_arp_send(struct sk_buff
*skb
, struct net_device
*dev
,
564 struct ipoib_pseudoheader
*phdr
)
566 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
567 struct ipoib_path
*path
;
570 * We can only be called from ipoib_start_xmit, so we're
571 * inside tx_lock -- no need to save/restore flags.
573 spin_lock(&priv
->lock
);
575 path
= __path_find(dev
, phdr
->hwaddr
+ 4);
577 path
= path_rec_create(dev
, phdr
->hwaddr
+ 4);
579 /* put pseudoheader back on for next time */
580 skb_push(skb
, sizeof *phdr
);
581 __skb_queue_tail(&path
->queue
, skb
);
583 if (path_rec_start(dev
, path
)) {
584 spin_unlock(&priv
->lock
);
585 path_free(dev
, path
);
588 __path_add(dev
, path
);
590 ++priv
->stats
.tx_dropped
;
591 dev_kfree_skb_any(skb
);
594 spin_unlock(&priv
->lock
);
599 ipoib_dbg(priv
, "Send unicast ARP to %04x\n",
600 be16_to_cpu(path
->pathrec
.dlid
));
602 ipoib_send(dev
, skb
, path
->ah
,
603 be32_to_cpup((__be32
*) phdr
->hwaddr
));
604 } else if ((path
->query
|| !path_rec_start(dev
, path
)) &&
605 skb_queue_len(&path
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
606 /* put pseudoheader back on for next time */
607 skb_push(skb
, sizeof *phdr
);
608 __skb_queue_tail(&path
->queue
, skb
);
610 ++priv
->stats
.tx_dropped
;
611 dev_kfree_skb_any(skb
);
614 spin_unlock(&priv
->lock
);
617 static int ipoib_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
619 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
620 struct ipoib_neigh
*neigh
;
623 if (!spin_trylock_irqsave(&priv
->tx_lock
, flags
))
624 return NETDEV_TX_LOCKED
;
627 * Check if our queue is stopped. Since we have the LLTX bit
628 * set, we can't rely on netif_stop_queue() preventing our
629 * xmit function from being called with a full queue.
631 if (unlikely(netif_queue_stopped(dev
))) {
632 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
633 return NETDEV_TX_BUSY
;
636 if (skb
->dst
&& skb
->dst
->neighbour
) {
637 if (unlikely(!*to_ipoib_neigh(skb
->dst
->neighbour
))) {
638 ipoib_path_lookup(skb
, dev
);
642 neigh
= *to_ipoib_neigh(skb
->dst
->neighbour
);
644 if (likely(neigh
->ah
)) {
645 if (unlikely(memcmp(&neigh
->dgid
.raw
,
646 skb
->dst
->neighbour
->ha
+ 4,
647 sizeof(union ib_gid
)))) {
648 spin_lock(&priv
->lock
);
650 * It's safe to call ipoib_put_ah() inside
651 * priv->lock here, because we know that
652 * path->ah will always hold one more reference,
653 * so ipoib_put_ah() will never do more than
654 * decrement the ref count.
656 ipoib_put_ah(neigh
->ah
);
657 list_del(&neigh
->list
);
658 ipoib_neigh_free(neigh
);
659 spin_unlock(&priv
->lock
);
660 ipoib_path_lookup(skb
, dev
);
664 ipoib_send(dev
, skb
, neigh
->ah
,
665 be32_to_cpup((__be32
*) skb
->dst
->neighbour
->ha
));
669 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
670 spin_lock(&priv
->lock
);
671 __skb_queue_tail(&neigh
->queue
, skb
);
672 spin_unlock(&priv
->lock
);
674 ++priv
->stats
.tx_dropped
;
675 dev_kfree_skb_any(skb
);
678 struct ipoib_pseudoheader
*phdr
=
679 (struct ipoib_pseudoheader
*) skb
->data
;
680 skb_pull(skb
, sizeof *phdr
);
682 if (phdr
->hwaddr
[4] == 0xff) {
683 /* Add in the P_Key for multicast*/
684 phdr
->hwaddr
[8] = (priv
->pkey
>> 8) & 0xff;
685 phdr
->hwaddr
[9] = priv
->pkey
& 0xff;
687 ipoib_mcast_send(dev
, phdr
->hwaddr
+ 4, skb
);
689 /* unicast GID -- should be ARP or RARP reply */
691 if ((be16_to_cpup((__be16
*) skb
->data
) != ETH_P_ARP
) &&
692 (be16_to_cpup((__be16
*) skb
->data
) != ETH_P_RARP
)) {
693 ipoib_warn(priv
, "Unicast, no %s: type %04x, QPN %06x "
695 skb
->dst
? "neigh" : "dst",
696 be16_to_cpup((__be16
*) skb
->data
),
697 be32_to_cpup((__be32
*) phdr
->hwaddr
),
698 IPOIB_GID_RAW_ARG(phdr
->hwaddr
+ 4));
699 dev_kfree_skb_any(skb
);
700 ++priv
->stats
.tx_dropped
;
704 unicast_arp_send(skb
, dev
, phdr
);
709 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
714 static struct net_device_stats
*ipoib_get_stats(struct net_device
*dev
)
716 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
721 static void ipoib_timeout(struct net_device
*dev
)
723 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
725 ipoib_warn(priv
, "transmit timeout: latency %d msecs\n",
726 jiffies_to_msecs(jiffies
- dev
->trans_start
));
727 ipoib_warn(priv
, "queue stopped %d, tx_head %u, tx_tail %u\n",
728 netif_queue_stopped(dev
),
729 priv
->tx_head
, priv
->tx_tail
);
730 /* XXX reset QP, etc. */
733 static int ipoib_hard_header(struct sk_buff
*skb
,
734 struct net_device
*dev
,
736 void *daddr
, void *saddr
, unsigned len
)
738 struct ipoib_header
*header
;
740 header
= (struct ipoib_header
*) skb_push(skb
, sizeof *header
);
742 header
->proto
= htons(type
);
743 header
->reserved
= 0;
746 * If we don't have a neighbour structure, stuff the
747 * destination address onto the front of the skb so we can
748 * figure out where to send the packet later.
750 if ((!skb
->dst
|| !skb
->dst
->neighbour
) && daddr
) {
751 struct ipoib_pseudoheader
*phdr
=
752 (struct ipoib_pseudoheader
*) skb_push(skb
, sizeof *phdr
);
753 memcpy(phdr
->hwaddr
, daddr
, INFINIBAND_ALEN
);
759 static void ipoib_set_mcast_list(struct net_device
*dev
)
761 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
763 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
764 ipoib_dbg(priv
, "IPOIB_FLAG_OPER_UP not set");
768 queue_work(ipoib_workqueue
, &priv
->restart_task
);
771 static void ipoib_neigh_destructor(struct neighbour
*n
)
773 struct ipoib_neigh
*neigh
;
774 struct ipoib_dev_priv
*priv
= netdev_priv(n
->dev
);
776 struct ipoib_ah
*ah
= NULL
;
779 "neigh_destructor for %06x " IPOIB_GID_FMT
"\n",
780 be32_to_cpup((__be32
*) n
->ha
),
781 IPOIB_GID_RAW_ARG(n
->ha
+ 4));
783 spin_lock_irqsave(&priv
->lock
, flags
);
785 neigh
= *to_ipoib_neigh(n
);
789 list_del(&neigh
->list
);
790 ipoib_neigh_free(neigh
);
793 spin_unlock_irqrestore(&priv
->lock
, flags
);
799 struct ipoib_neigh
*ipoib_neigh_alloc(struct neighbour
*neighbour
)
801 struct ipoib_neigh
*neigh
;
803 neigh
= kmalloc(sizeof *neigh
, GFP_ATOMIC
);
807 neigh
->neighbour
= neighbour
;
808 *to_ipoib_neigh(neighbour
) = neigh
;
813 void ipoib_neigh_free(struct ipoib_neigh
*neigh
)
815 *to_ipoib_neigh(neigh
->neighbour
) = NULL
;
819 static int ipoib_neigh_setup_dev(struct net_device
*dev
, struct neigh_parms
*parms
)
821 parms
->neigh_destructor
= ipoib_neigh_destructor
;
826 int ipoib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
828 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
830 /* Allocate RX/TX "rings" to hold queued skbs */
831 priv
->rx_ring
= kzalloc(ipoib_recvq_size
* sizeof *priv
->rx_ring
,
833 if (!priv
->rx_ring
) {
834 printk(KERN_WARNING
"%s: failed to allocate RX ring (%d entries)\n",
835 ca
->name
, ipoib_recvq_size
);
839 priv
->tx_ring
= kzalloc(ipoib_sendq_size
* sizeof *priv
->tx_ring
,
841 if (!priv
->tx_ring
) {
842 printk(KERN_WARNING
"%s: failed to allocate TX ring (%d entries)\n",
843 ca
->name
, ipoib_sendq_size
);
844 goto out_rx_ring_cleanup
;
847 /* priv->tx_head & tx_tail are already 0 */
849 if (ipoib_ib_dev_init(dev
, ca
, port
))
850 goto out_tx_ring_cleanup
;
855 kfree(priv
->tx_ring
);
858 kfree(priv
->rx_ring
);
864 void ipoib_dev_cleanup(struct net_device
*dev
)
866 struct ipoib_dev_priv
*priv
= netdev_priv(dev
), *cpriv
, *tcpriv
;
868 ipoib_delete_debug_files(dev
);
870 /* Delete any child interfaces first */
871 list_for_each_entry_safe(cpriv
, tcpriv
, &priv
->child_intfs
, list
) {
872 unregister_netdev(cpriv
->dev
);
873 ipoib_dev_cleanup(cpriv
->dev
);
874 free_netdev(cpriv
->dev
);
877 ipoib_ib_dev_cleanup(dev
);
879 kfree(priv
->rx_ring
);
880 kfree(priv
->tx_ring
);
882 priv
->rx_ring
= NULL
;
883 priv
->tx_ring
= NULL
;
886 static void ipoib_setup(struct net_device
*dev
)
888 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
890 dev
->open
= ipoib_open
;
891 dev
->stop
= ipoib_stop
;
892 dev
->change_mtu
= ipoib_change_mtu
;
893 dev
->hard_start_xmit
= ipoib_start_xmit
;
894 dev
->get_stats
= ipoib_get_stats
;
895 dev
->tx_timeout
= ipoib_timeout
;
896 dev
->hard_header
= ipoib_hard_header
;
897 dev
->set_multicast_list
= ipoib_set_mcast_list
;
898 dev
->neigh_setup
= ipoib_neigh_setup_dev
;
900 dev
->watchdog_timeo
= HZ
;
902 dev
->flags
|= IFF_BROADCAST
| IFF_MULTICAST
;
905 * We add in INFINIBAND_ALEN to allow for the destination
906 * address "pseudoheader" for skbs without neighbour struct.
908 dev
->hard_header_len
= IPOIB_ENCAP_LEN
+ INFINIBAND_ALEN
;
909 dev
->addr_len
= INFINIBAND_ALEN
;
910 dev
->type
= ARPHRD_INFINIBAND
;
911 dev
->tx_queue_len
= ipoib_sendq_size
* 2;
912 dev
->features
= NETIF_F_VLAN_CHALLENGED
| NETIF_F_LLTX
;
914 /* MTU will be reset when mcast join happens */
915 dev
->mtu
= IPOIB_PACKET_SIZE
- IPOIB_ENCAP_LEN
;
916 priv
->mcast_mtu
= priv
->admin_mtu
= dev
->mtu
;
918 memcpy(dev
->broadcast
, ipv4_bcast_addr
, INFINIBAND_ALEN
);
920 netif_carrier_off(dev
);
922 SET_MODULE_OWNER(dev
);
926 spin_lock_init(&priv
->lock
);
927 spin_lock_init(&priv
->tx_lock
);
929 mutex_init(&priv
->mcast_mutex
);
930 mutex_init(&priv
->vlan_mutex
);
932 INIT_LIST_HEAD(&priv
->path_list
);
933 INIT_LIST_HEAD(&priv
->child_intfs
);
934 INIT_LIST_HEAD(&priv
->dead_ahs
);
935 INIT_LIST_HEAD(&priv
->multicast_list
);
937 INIT_WORK(&priv
->pkey_task
, ipoib_pkey_poll
, priv
->dev
);
938 INIT_WORK(&priv
->mcast_task
, ipoib_mcast_join_task
, priv
->dev
);
939 INIT_WORK(&priv
->flush_task
, ipoib_ib_dev_flush
, priv
->dev
);
940 INIT_WORK(&priv
->restart_task
, ipoib_mcast_restart_task
, priv
->dev
);
941 INIT_WORK(&priv
->ah_reap_task
, ipoib_reap_ah
, priv
->dev
);
944 struct ipoib_dev_priv
*ipoib_intf_alloc(const char *name
)
946 struct net_device
*dev
;
948 dev
= alloc_netdev((int) sizeof (struct ipoib_dev_priv
), name
,
953 return netdev_priv(dev
);
956 static ssize_t
show_pkey(struct class_device
*cdev
, char *buf
)
958 struct ipoib_dev_priv
*priv
=
959 netdev_priv(container_of(cdev
, struct net_device
, class_dev
));
961 return sprintf(buf
, "0x%04x\n", priv
->pkey
);
963 static CLASS_DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
965 static ssize_t
create_child(struct class_device
*cdev
,
966 const char *buf
, size_t count
)
971 if (sscanf(buf
, "%i", &pkey
) != 1)
974 if (pkey
< 0 || pkey
> 0xffff)
978 * Set the full membership bit, so that we join the right
979 * broadcast group, etc.
983 ret
= ipoib_vlan_add(container_of(cdev
, struct net_device
, class_dev
),
986 return ret
? ret
: count
;
988 static CLASS_DEVICE_ATTR(create_child
, S_IWUGO
, NULL
, create_child
);
990 static ssize_t
delete_child(struct class_device
*cdev
,
991 const char *buf
, size_t count
)
996 if (sscanf(buf
, "%i", &pkey
) != 1)
999 if (pkey
< 0 || pkey
> 0xffff)
1002 ret
= ipoib_vlan_delete(container_of(cdev
, struct net_device
, class_dev
),
1005 return ret
? ret
: count
;
1008 static CLASS_DEVICE_ATTR(delete_child
, S_IWUGO
, NULL
, delete_child
);
1010 int ipoib_add_pkey_attr(struct net_device
*dev
)
1012 return class_device_create_file(&dev
->class_dev
,
1013 &class_device_attr_pkey
);
1016 static struct net_device
*ipoib_add_port(const char *format
,
1017 struct ib_device
*hca
, u8 port
)
1019 struct ipoib_dev_priv
*priv
;
1020 int result
= -ENOMEM
;
1022 priv
= ipoib_intf_alloc(format
);
1024 goto alloc_mem_failed
;
1026 SET_NETDEV_DEV(priv
->dev
, hca
->dma_device
);
1028 result
= ib_query_pkey(hca
, port
, 0, &priv
->pkey
);
1030 printk(KERN_WARNING
"%s: ib_query_pkey port %d failed (ret = %d)\n",
1031 hca
->name
, port
, result
);
1032 goto alloc_mem_failed
;
1036 * Set the full membership bit, so that we join the right
1037 * broadcast group, etc.
1039 priv
->pkey
|= 0x8000;
1041 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
1042 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
1044 result
= ib_query_gid(hca
, port
, 0, &priv
->local_gid
);
1046 printk(KERN_WARNING
"%s: ib_query_gid port %d failed (ret = %d)\n",
1047 hca
->name
, port
, result
);
1048 goto alloc_mem_failed
;
1050 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
1053 result
= ipoib_dev_init(priv
->dev
, hca
, port
);
1055 printk(KERN_WARNING
"%s: failed to initialize port %d (ret = %d)\n",
1056 hca
->name
, port
, result
);
1057 goto device_init_failed
;
1060 INIT_IB_EVENT_HANDLER(&priv
->event_handler
,
1061 priv
->ca
, ipoib_event
);
1062 result
= ib_register_event_handler(&priv
->event_handler
);
1064 printk(KERN_WARNING
"%s: ib_register_event_handler failed for "
1065 "port %d (ret = %d)\n",
1066 hca
->name
, port
, result
);
1070 result
= register_netdev(priv
->dev
);
1072 printk(KERN_WARNING
"%s: couldn't register ipoib port %d; error %d\n",
1073 hca
->name
, port
, result
);
1074 goto register_failed
;
1077 ipoib_create_debug_files(priv
->dev
);
1079 if (ipoib_add_pkey_attr(priv
->dev
))
1081 if (class_device_create_file(&priv
->dev
->class_dev
,
1082 &class_device_attr_create_child
))
1084 if (class_device_create_file(&priv
->dev
->class_dev
,
1085 &class_device_attr_delete_child
))
1091 ipoib_delete_debug_files(priv
->dev
);
1092 unregister_netdev(priv
->dev
);
1095 ib_unregister_event_handler(&priv
->event_handler
);
1096 flush_scheduled_work();
1099 ipoib_dev_cleanup(priv
->dev
);
1102 free_netdev(priv
->dev
);
1105 return ERR_PTR(result
);
1108 static void ipoib_add_one(struct ib_device
*device
)
1110 struct list_head
*dev_list
;
1111 struct net_device
*dev
;
1112 struct ipoib_dev_priv
*priv
;
1115 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1118 dev_list
= kmalloc(sizeof *dev_list
, GFP_KERNEL
);
1122 INIT_LIST_HEAD(dev_list
);
1124 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
1129 e
= device
->phys_port_cnt
;
1132 for (p
= s
; p
<= e
; ++p
) {
1133 dev
= ipoib_add_port("ib%d", device
, p
);
1135 priv
= netdev_priv(dev
);
1136 list_add_tail(&priv
->list
, dev_list
);
1140 ib_set_client_data(device
, &ipoib_client
, dev_list
);
1143 static void ipoib_remove_one(struct ib_device
*device
)
1145 struct ipoib_dev_priv
*priv
, *tmp
;
1146 struct list_head
*dev_list
;
1148 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1151 dev_list
= ib_get_client_data(device
, &ipoib_client
);
1153 list_for_each_entry_safe(priv
, tmp
, dev_list
, list
) {
1154 ib_unregister_event_handler(&priv
->event_handler
);
1155 flush_scheduled_work();
1157 unregister_netdev(priv
->dev
);
1158 ipoib_dev_cleanup(priv
->dev
);
1159 free_netdev(priv
->dev
);
1165 static int __init
ipoib_init_module(void)
1169 ipoib_recvq_size
= roundup_pow_of_two(ipoib_recvq_size
);
1170 ipoib_recvq_size
= min(ipoib_recvq_size
, IPOIB_MAX_QUEUE_SIZE
);
1171 ipoib_recvq_size
= max(ipoib_recvq_size
, IPOIB_MIN_QUEUE_SIZE
);
1173 ipoib_sendq_size
= roundup_pow_of_two(ipoib_sendq_size
);
1174 ipoib_sendq_size
= min(ipoib_sendq_size
, IPOIB_MAX_QUEUE_SIZE
);
1175 ipoib_sendq_size
= max(ipoib_sendq_size
, IPOIB_MIN_QUEUE_SIZE
);
1177 ret
= ipoib_register_debugfs();
1182 * We create our own workqueue mainly because we want to be
1183 * able to flush it when devices are being removed. We can't
1184 * use schedule_work()/flush_scheduled_work() because both
1185 * unregister_netdev() and linkwatch_event take the rtnl lock,
1186 * so flush_scheduled_work() can deadlock during device
1189 ipoib_workqueue
= create_singlethread_workqueue("ipoib");
1190 if (!ipoib_workqueue
) {
1195 ib_sa_register_client(&ipoib_sa_client
);
1197 ret
= ib_register_client(&ipoib_client
);
1204 ib_sa_unregister_client(&ipoib_sa_client
);
1205 destroy_workqueue(ipoib_workqueue
);
1208 ipoib_unregister_debugfs();
1213 static void __exit
ipoib_cleanup_module(void)
1215 ib_unregister_client(&ipoib_client
);
1216 ib_sa_unregister_client(&ipoib_sa_client
);
1217 ipoib_unregister_debugfs();
1218 destroy_workqueue(ipoib_workqueue
);
1221 module_init(ipoib_init_module
);
1222 module_exit(ipoib_cleanup_module
);