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/vmalloc.h>
44 #include <linux/kernel.h>
46 #include <linux/if_arp.h> /* For ARPHRD_xxx */
53 MODULE_AUTHOR("Roland Dreier");
54 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
55 MODULE_LICENSE("Dual BSD/GPL");
57 int ipoib_sendq_size __read_mostly
= IPOIB_TX_RING_SIZE
;
58 int ipoib_recvq_size __read_mostly
= IPOIB_RX_RING_SIZE
;
60 module_param_named(send_queue_size
, ipoib_sendq_size
, int, 0444);
61 MODULE_PARM_DESC(send_queue_size
, "Number of descriptors in send queue");
62 module_param_named(recv_queue_size
, ipoib_recvq_size
, int, 0444);
63 MODULE_PARM_DESC(recv_queue_size
, "Number of descriptors in receive queue");
65 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
66 int ipoib_debug_level
;
68 module_param_named(debug_level
, ipoib_debug_level
, int, 0644);
69 MODULE_PARM_DESC(debug_level
, "Enable debug tracing if > 0");
72 struct ipoib_path_iter
{
73 struct net_device
*dev
;
74 struct ipoib_path path
;
77 static const u8 ipv4_bcast_addr
[] = {
78 0x00, 0xff, 0xff, 0xff,
79 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
80 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
83 struct workqueue_struct
*ipoib_workqueue
;
85 static void ipoib_add_one(struct ib_device
*device
);
86 static void ipoib_remove_one(struct ib_device
*device
);
88 static struct ib_client ipoib_client
= {
91 .remove
= ipoib_remove_one
94 int ipoib_open(struct net_device
*dev
)
96 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
98 ipoib_dbg(priv
, "bringing up interface\n");
100 set_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
102 if (ipoib_pkey_dev_delay_open(dev
))
105 if (ipoib_ib_dev_open(dev
))
108 if (ipoib_ib_dev_up(dev
)) {
109 ipoib_ib_dev_stop(dev
);
113 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
114 struct ipoib_dev_priv
*cpriv
;
116 /* Bring up any child interfaces too */
117 mutex_lock(&priv
->vlan_mutex
);
118 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
121 flags
= cpriv
->dev
->flags
;
125 dev_change_flags(cpriv
->dev
, flags
| IFF_UP
);
127 mutex_unlock(&priv
->vlan_mutex
);
130 netif_start_queue(dev
);
135 static int ipoib_stop(struct net_device
*dev
)
137 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
139 ipoib_dbg(priv
, "stopping interface\n");
141 clear_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
143 netif_stop_queue(dev
);
146 * Now flush workqueue to make sure a scheduled task doesn't
147 * bring our internal state back up.
149 flush_workqueue(ipoib_workqueue
);
151 ipoib_ib_dev_down(dev
, 1);
152 ipoib_ib_dev_stop(dev
);
154 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
155 struct ipoib_dev_priv
*cpriv
;
157 /* Bring down any child interfaces too */
158 mutex_lock(&priv
->vlan_mutex
);
159 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
162 flags
= cpriv
->dev
->flags
;
163 if (!(flags
& IFF_UP
))
166 dev_change_flags(cpriv
->dev
, flags
& ~IFF_UP
);
168 mutex_unlock(&priv
->vlan_mutex
);
174 static int ipoib_change_mtu(struct net_device
*dev
, int new_mtu
)
176 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
178 if (new_mtu
> IPOIB_PACKET_SIZE
- IPOIB_ENCAP_LEN
)
181 priv
->admin_mtu
= new_mtu
;
183 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
188 static struct ipoib_path
*__path_find(struct net_device
*dev
, void *gid
)
190 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
191 struct rb_node
*n
= priv
->path_tree
.rb_node
;
192 struct ipoib_path
*path
;
196 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
198 ret
= memcmp(gid
, path
->pathrec
.dgid
.raw
,
199 sizeof (union ib_gid
));
212 static int __path_add(struct net_device
*dev
, struct ipoib_path
*path
)
214 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
215 struct rb_node
**n
= &priv
->path_tree
.rb_node
;
216 struct rb_node
*pn
= NULL
;
217 struct ipoib_path
*tpath
;
222 tpath
= rb_entry(pn
, struct ipoib_path
, rb_node
);
224 ret
= memcmp(path
->pathrec
.dgid
.raw
, tpath
->pathrec
.dgid
.raw
,
225 sizeof (union ib_gid
));
234 rb_link_node(&path
->rb_node
, pn
, n
);
235 rb_insert_color(&path
->rb_node
, &priv
->path_tree
);
237 list_add_tail(&path
->list
, &priv
->path_list
);
242 static void path_free(struct net_device
*dev
, struct ipoib_path
*path
)
244 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
245 struct ipoib_neigh
*neigh
, *tn
;
249 while ((skb
= __skb_dequeue(&path
->queue
)))
250 dev_kfree_skb_irq(skb
);
252 spin_lock_irqsave(&priv
->lock
, flags
);
254 list_for_each_entry_safe(neigh
, tn
, &path
->neigh_list
, list
) {
256 * It's safe to call ipoib_put_ah() inside priv->lock
257 * here, because we know that path->ah will always
258 * hold one more reference, so ipoib_put_ah() will
259 * never do more than decrement the ref count.
262 ipoib_put_ah(neigh
->ah
);
264 ipoib_neigh_free(neigh
);
267 spin_unlock_irqrestore(&priv
->lock
, flags
);
270 ipoib_put_ah(path
->ah
);
275 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
277 struct ipoib_path_iter
*ipoib_path_iter_init(struct net_device
*dev
)
279 struct ipoib_path_iter
*iter
;
281 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
286 memset(iter
->path
.pathrec
.dgid
.raw
, 0, 16);
288 if (ipoib_path_iter_next(iter
)) {
296 int ipoib_path_iter_next(struct ipoib_path_iter
*iter
)
298 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
300 struct ipoib_path
*path
;
303 spin_lock_irq(&priv
->lock
);
305 n
= rb_first(&priv
->path_tree
);
308 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
310 if (memcmp(iter
->path
.pathrec
.dgid
.raw
, path
->pathrec
.dgid
.raw
,
311 sizeof (union ib_gid
)) < 0) {
320 spin_unlock_irq(&priv
->lock
);
325 void ipoib_path_iter_read(struct ipoib_path_iter
*iter
,
326 struct ipoib_path
*path
)
331 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
333 void ipoib_flush_paths(struct net_device
*dev
)
335 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
336 struct ipoib_path
*path
, *tp
;
337 LIST_HEAD(remove_list
);
339 spin_lock_irq(&priv
->lock
);
341 list_splice(&priv
->path_list
, &remove_list
);
342 INIT_LIST_HEAD(&priv
->path_list
);
344 list_for_each_entry(path
, &remove_list
, list
)
345 rb_erase(&path
->rb_node
, &priv
->path_tree
);
347 list_for_each_entry_safe(path
, tp
, &remove_list
, list
) {
349 ib_sa_cancel_query(path
->query_id
, path
->query
);
350 spin_unlock_irq(&priv
->lock
);
351 wait_for_completion(&path
->done
);
352 path_free(dev
, path
);
353 spin_lock_irq(&priv
->lock
);
355 spin_unlock_irq(&priv
->lock
);
358 static void path_rec_completion(int status
,
359 struct ib_sa_path_rec
*pathrec
,
362 struct ipoib_path
*path
= path_ptr
;
363 struct net_device
*dev
= path
->dev
;
364 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
365 struct ipoib_ah
*ah
= NULL
;
366 struct ipoib_neigh
*neigh
;
367 struct sk_buff_head skqueue
;
372 ipoib_dbg(priv
, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT
"\n",
373 be16_to_cpu(pathrec
->dlid
), IPOIB_GID_ARG(pathrec
->dgid
));
375 ipoib_dbg(priv
, "PathRec status %d for GID " IPOIB_GID_FMT
"\n",
376 status
, IPOIB_GID_ARG(path
->pathrec
.dgid
));
378 skb_queue_head_init(&skqueue
);
381 struct ib_ah_attr av
= {
382 .dlid
= be16_to_cpu(pathrec
->dlid
),
384 .port_num
= priv
->port
,
385 .static_rate
= pathrec
->rate
388 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
391 spin_lock_irqsave(&priv
->lock
, flags
);
396 path
->pathrec
= *pathrec
;
398 ipoib_dbg(priv
, "created address handle %p for LID 0x%04x, SL %d\n",
399 ah
, be16_to_cpu(pathrec
->dlid
), pathrec
->sl
);
401 while ((skb
= __skb_dequeue(&path
->queue
)))
402 __skb_queue_tail(&skqueue
, skb
);
404 list_for_each_entry(neigh
, &path
->neigh_list
, list
) {
405 kref_get(&path
->ah
->ref
);
406 neigh
->ah
= path
->ah
;
408 while ((skb
= __skb_dequeue(&neigh
->queue
)))
409 __skb_queue_tail(&skqueue
, skb
);
414 complete(&path
->done
);
416 spin_unlock_irqrestore(&priv
->lock
, flags
);
418 while ((skb
= __skb_dequeue(&skqueue
))) {
420 if (dev_queue_xmit(skb
))
421 ipoib_warn(priv
, "dev_queue_xmit failed "
422 "to requeue packet\n");
426 static struct ipoib_path
*path_rec_create(struct net_device
*dev
, void *gid
)
428 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
429 struct ipoib_path
*path
;
431 path
= kzalloc(sizeof *path
, GFP_ATOMIC
);
437 skb_queue_head_init(&path
->queue
);
439 INIT_LIST_HEAD(&path
->neigh_list
);
441 memcpy(path
->pathrec
.dgid
.raw
, gid
, sizeof (union ib_gid
));
442 path
->pathrec
.sgid
= priv
->local_gid
;
443 path
->pathrec
.pkey
= cpu_to_be16(priv
->pkey
);
444 path
->pathrec
.numb_path
= 1;
449 static int path_rec_start(struct net_device
*dev
,
450 struct ipoib_path
*path
)
452 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
454 ipoib_dbg(priv
, "Start path record lookup for " IPOIB_GID_FMT
"\n",
455 IPOIB_GID_ARG(path
->pathrec
.dgid
));
457 init_completion(&path
->done
);
460 ib_sa_path_rec_get(priv
->ca
, priv
->port
,
462 IB_SA_PATH_REC_DGID
|
463 IB_SA_PATH_REC_SGID
|
464 IB_SA_PATH_REC_NUMB_PATH
|
469 if (path
->query_id
< 0) {
470 ipoib_warn(priv
, "ib_sa_path_rec_get failed\n");
472 return path
->query_id
;
478 static void neigh_add_path(struct sk_buff
*skb
, struct net_device
*dev
)
480 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
481 struct ipoib_path
*path
;
482 struct ipoib_neigh
*neigh
;
484 neigh
= ipoib_neigh_alloc(skb
->dst
->neighbour
);
486 ++priv
->stats
.tx_dropped
;
487 dev_kfree_skb_any(skb
);
491 skb_queue_head_init(&neigh
->queue
);
494 * We can only be called from ipoib_start_xmit, so we're
495 * inside tx_lock -- no need to save/restore flags.
497 spin_lock(&priv
->lock
);
499 path
= __path_find(dev
, skb
->dst
->neighbour
->ha
+ 4);
501 path
= path_rec_create(dev
, skb
->dst
->neighbour
->ha
+ 4);
505 __path_add(dev
, path
);
508 list_add_tail(&neigh
->list
, &path
->neigh_list
);
511 kref_get(&path
->ah
->ref
);
512 neigh
->ah
= path
->ah
;
514 ipoib_send(dev
, skb
, path
->ah
,
515 be32_to_cpup((__be32
*) skb
->dst
->neighbour
->ha
));
518 __skb_queue_tail(&neigh
->queue
, skb
);
520 if (!path
->query
&& path_rec_start(dev
, path
))
524 spin_unlock(&priv
->lock
);
528 list_del(&neigh
->list
);
531 ipoib_neigh_free(neigh
);
532 ++priv
->stats
.tx_dropped
;
533 dev_kfree_skb_any(skb
);
535 spin_unlock(&priv
->lock
);
538 static void ipoib_path_lookup(struct sk_buff
*skb
, struct net_device
*dev
)
540 struct ipoib_dev_priv
*priv
= netdev_priv(skb
->dev
);
542 /* Look up path record for unicasts */
543 if (skb
->dst
->neighbour
->ha
[4] != 0xff) {
544 neigh_add_path(skb
, dev
);
548 /* Add in the P_Key for multicasts */
549 skb
->dst
->neighbour
->ha
[8] = (priv
->pkey
>> 8) & 0xff;
550 skb
->dst
->neighbour
->ha
[9] = priv
->pkey
& 0xff;
551 ipoib_mcast_send(dev
, skb
->dst
->neighbour
->ha
+ 4, skb
);
554 static void unicast_arp_send(struct sk_buff
*skb
, struct net_device
*dev
,
555 struct ipoib_pseudoheader
*phdr
)
557 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
558 struct ipoib_path
*path
;
561 * We can only be called from ipoib_start_xmit, so we're
562 * inside tx_lock -- no need to save/restore flags.
564 spin_lock(&priv
->lock
);
566 path
= __path_find(dev
, phdr
->hwaddr
+ 4);
568 path
= path_rec_create(dev
, phdr
->hwaddr
+ 4);
570 /* put pseudoheader back on for next time */
571 skb_push(skb
, sizeof *phdr
);
572 __skb_queue_tail(&path
->queue
, skb
);
574 if (path_rec_start(dev
, path
)) {
575 spin_unlock(&priv
->lock
);
576 path_free(dev
, path
);
579 __path_add(dev
, path
);
581 ++priv
->stats
.tx_dropped
;
582 dev_kfree_skb_any(skb
);
585 spin_unlock(&priv
->lock
);
590 ipoib_dbg(priv
, "Send unicast ARP to %04x\n",
591 be16_to_cpu(path
->pathrec
.dlid
));
593 ipoib_send(dev
, skb
, path
->ah
,
594 be32_to_cpup((__be32
*) phdr
->hwaddr
));
595 } else if ((path
->query
|| !path_rec_start(dev
, path
)) &&
596 skb_queue_len(&path
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
597 /* put pseudoheader back on for next time */
598 skb_push(skb
, sizeof *phdr
);
599 __skb_queue_tail(&path
->queue
, skb
);
601 ++priv
->stats
.tx_dropped
;
602 dev_kfree_skb_any(skb
);
605 spin_unlock(&priv
->lock
);
608 static int ipoib_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
610 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
611 struct ipoib_neigh
*neigh
;
614 if (!spin_trylock_irqsave(&priv
->tx_lock
, flags
))
615 return NETDEV_TX_LOCKED
;
618 * Check if our queue is stopped. Since we have the LLTX bit
619 * set, we can't rely on netif_stop_queue() preventing our
620 * xmit function from being called with a full queue.
622 if (unlikely(netif_queue_stopped(dev
))) {
623 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
624 return NETDEV_TX_BUSY
;
627 if (skb
->dst
&& skb
->dst
->neighbour
) {
628 if (unlikely(!*to_ipoib_neigh(skb
->dst
->neighbour
))) {
629 ipoib_path_lookup(skb
, dev
);
633 neigh
= *to_ipoib_neigh(skb
->dst
->neighbour
);
635 if (likely(neigh
->ah
)) {
636 ipoib_send(dev
, skb
, neigh
->ah
,
637 be32_to_cpup((__be32
*) skb
->dst
->neighbour
->ha
));
641 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
642 spin_lock(&priv
->lock
);
643 __skb_queue_tail(&neigh
->queue
, skb
);
644 spin_unlock(&priv
->lock
);
646 ++priv
->stats
.tx_dropped
;
647 dev_kfree_skb_any(skb
);
650 struct ipoib_pseudoheader
*phdr
=
651 (struct ipoib_pseudoheader
*) skb
->data
;
652 skb_pull(skb
, sizeof *phdr
);
654 if (phdr
->hwaddr
[4] == 0xff) {
655 /* Add in the P_Key for multicast*/
656 phdr
->hwaddr
[8] = (priv
->pkey
>> 8) & 0xff;
657 phdr
->hwaddr
[9] = priv
->pkey
& 0xff;
659 ipoib_mcast_send(dev
, phdr
->hwaddr
+ 4, skb
);
661 /* unicast GID -- should be ARP or RARP reply */
663 if ((be16_to_cpup((__be16
*) skb
->data
) != ETH_P_ARP
) &&
664 (be16_to_cpup((__be16
*) skb
->data
) != ETH_P_RARP
)) {
665 ipoib_warn(priv
, "Unicast, no %s: type %04x, QPN %06x "
667 skb
->dst
? "neigh" : "dst",
668 be16_to_cpup((__be16
*) skb
->data
),
669 be32_to_cpup((__be32
*) phdr
->hwaddr
),
670 IPOIB_GID_RAW_ARG(phdr
->hwaddr
+ 4));
671 dev_kfree_skb_any(skb
);
672 ++priv
->stats
.tx_dropped
;
676 unicast_arp_send(skb
, dev
, phdr
);
681 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
686 static struct net_device_stats
*ipoib_get_stats(struct net_device
*dev
)
688 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
693 static void ipoib_timeout(struct net_device
*dev
)
695 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
697 ipoib_warn(priv
, "transmit timeout: latency %d msecs\n",
698 jiffies_to_msecs(jiffies
- dev
->trans_start
));
699 ipoib_warn(priv
, "queue stopped %d, tx_head %u, tx_tail %u\n",
700 netif_queue_stopped(dev
),
701 priv
->tx_head
, priv
->tx_tail
);
702 /* XXX reset QP, etc. */
705 static int ipoib_hard_header(struct sk_buff
*skb
,
706 struct net_device
*dev
,
708 void *daddr
, void *saddr
, unsigned len
)
710 struct ipoib_header
*header
;
712 header
= (struct ipoib_header
*) skb_push(skb
, sizeof *header
);
714 header
->proto
= htons(type
);
715 header
->reserved
= 0;
718 * If we don't have a neighbour structure, stuff the
719 * destination address onto the front of the skb so we can
720 * figure out where to send the packet later.
722 if ((!skb
->dst
|| !skb
->dst
->neighbour
) && daddr
) {
723 struct ipoib_pseudoheader
*phdr
=
724 (struct ipoib_pseudoheader
*) skb_push(skb
, sizeof *phdr
);
725 memcpy(phdr
->hwaddr
, daddr
, INFINIBAND_ALEN
);
731 static void ipoib_set_mcast_list(struct net_device
*dev
)
733 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
735 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
736 ipoib_dbg(priv
, "IPOIB_FLAG_OPER_UP not set");
740 queue_work(ipoib_workqueue
, &priv
->restart_task
);
743 static void ipoib_neigh_destructor(struct neighbour
*n
)
745 struct ipoib_neigh
*neigh
;
746 struct ipoib_dev_priv
*priv
= netdev_priv(n
->dev
);
748 struct ipoib_ah
*ah
= NULL
;
751 "neigh_destructor for %06x " IPOIB_GID_FMT
"\n",
752 be32_to_cpup((__be32
*) n
->ha
),
753 IPOIB_GID_RAW_ARG(n
->ha
+ 4));
755 spin_lock_irqsave(&priv
->lock
, flags
);
757 neigh
= *to_ipoib_neigh(n
);
761 list_del(&neigh
->list
);
762 ipoib_neigh_free(neigh
);
765 spin_unlock_irqrestore(&priv
->lock
, flags
);
771 struct ipoib_neigh
*ipoib_neigh_alloc(struct neighbour
*neighbour
)
773 struct ipoib_neigh
*neigh
;
775 neigh
= kmalloc(sizeof *neigh
, GFP_ATOMIC
);
779 neigh
->neighbour
= neighbour
;
780 *to_ipoib_neigh(neighbour
) = neigh
;
785 void ipoib_neigh_free(struct ipoib_neigh
*neigh
)
787 *to_ipoib_neigh(neigh
->neighbour
) = NULL
;
791 static int ipoib_neigh_setup_dev(struct net_device
*dev
, struct neigh_parms
*parms
)
793 parms
->neigh_destructor
= ipoib_neigh_destructor
;
798 int ipoib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
800 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
802 /* Allocate RX/TX "rings" to hold queued skbs */
803 priv
->rx_ring
= kzalloc(ipoib_recvq_size
* sizeof *priv
->rx_ring
,
805 if (!priv
->rx_ring
) {
806 printk(KERN_WARNING
"%s: failed to allocate RX ring (%d entries)\n",
807 ca
->name
, ipoib_recvq_size
);
811 priv
->tx_ring
= kzalloc(ipoib_sendq_size
* sizeof *priv
->tx_ring
,
813 if (!priv
->tx_ring
) {
814 printk(KERN_WARNING
"%s: failed to allocate TX ring (%d entries)\n",
815 ca
->name
, ipoib_sendq_size
);
816 goto out_rx_ring_cleanup
;
819 /* priv->tx_head & tx_tail are already 0 */
821 if (ipoib_ib_dev_init(dev
, ca
, port
))
822 goto out_tx_ring_cleanup
;
827 kfree(priv
->tx_ring
);
830 kfree(priv
->rx_ring
);
836 void ipoib_dev_cleanup(struct net_device
*dev
)
838 struct ipoib_dev_priv
*priv
= netdev_priv(dev
), *cpriv
, *tcpriv
;
840 ipoib_delete_debug_files(dev
);
842 /* Delete any child interfaces first */
843 list_for_each_entry_safe(cpriv
, tcpriv
, &priv
->child_intfs
, list
) {
844 unregister_netdev(cpriv
->dev
);
845 ipoib_dev_cleanup(cpriv
->dev
);
846 free_netdev(cpriv
->dev
);
849 ipoib_ib_dev_cleanup(dev
);
851 kfree(priv
->rx_ring
);
852 kfree(priv
->tx_ring
);
854 priv
->rx_ring
= NULL
;
855 priv
->tx_ring
= NULL
;
858 static void ipoib_setup(struct net_device
*dev
)
860 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
862 dev
->open
= ipoib_open
;
863 dev
->stop
= ipoib_stop
;
864 dev
->change_mtu
= ipoib_change_mtu
;
865 dev
->hard_start_xmit
= ipoib_start_xmit
;
866 dev
->get_stats
= ipoib_get_stats
;
867 dev
->tx_timeout
= ipoib_timeout
;
868 dev
->hard_header
= ipoib_hard_header
;
869 dev
->set_multicast_list
= ipoib_set_mcast_list
;
870 dev
->neigh_setup
= ipoib_neigh_setup_dev
;
872 dev
->watchdog_timeo
= HZ
;
874 dev
->flags
|= IFF_BROADCAST
| IFF_MULTICAST
;
877 * We add in INFINIBAND_ALEN to allow for the destination
878 * address "pseudoheader" for skbs without neighbour struct.
880 dev
->hard_header_len
= IPOIB_ENCAP_LEN
+ INFINIBAND_ALEN
;
881 dev
->addr_len
= INFINIBAND_ALEN
;
882 dev
->type
= ARPHRD_INFINIBAND
;
883 dev
->tx_queue_len
= ipoib_sendq_size
* 2;
884 dev
->features
= NETIF_F_VLAN_CHALLENGED
| NETIF_F_LLTX
;
886 /* MTU will be reset when mcast join happens */
887 dev
->mtu
= IPOIB_PACKET_SIZE
- IPOIB_ENCAP_LEN
;
888 priv
->mcast_mtu
= priv
->admin_mtu
= dev
->mtu
;
890 memcpy(dev
->broadcast
, ipv4_bcast_addr
, INFINIBAND_ALEN
);
892 netif_carrier_off(dev
);
894 SET_MODULE_OWNER(dev
);
898 spin_lock_init(&priv
->lock
);
899 spin_lock_init(&priv
->tx_lock
);
901 mutex_init(&priv
->mcast_mutex
);
902 mutex_init(&priv
->vlan_mutex
);
904 INIT_LIST_HEAD(&priv
->path_list
);
905 INIT_LIST_HEAD(&priv
->child_intfs
);
906 INIT_LIST_HEAD(&priv
->dead_ahs
);
907 INIT_LIST_HEAD(&priv
->multicast_list
);
909 INIT_WORK(&priv
->pkey_task
, ipoib_pkey_poll
, priv
->dev
);
910 INIT_WORK(&priv
->mcast_task
, ipoib_mcast_join_task
, priv
->dev
);
911 INIT_WORK(&priv
->flush_task
, ipoib_ib_dev_flush
, priv
->dev
);
912 INIT_WORK(&priv
->restart_task
, ipoib_mcast_restart_task
, priv
->dev
);
913 INIT_WORK(&priv
->ah_reap_task
, ipoib_reap_ah
, priv
->dev
);
916 struct ipoib_dev_priv
*ipoib_intf_alloc(const char *name
)
918 struct net_device
*dev
;
920 dev
= alloc_netdev((int) sizeof (struct ipoib_dev_priv
), name
,
925 return netdev_priv(dev
);
928 static ssize_t
show_pkey(struct class_device
*cdev
, char *buf
)
930 struct ipoib_dev_priv
*priv
=
931 netdev_priv(container_of(cdev
, struct net_device
, class_dev
));
933 return sprintf(buf
, "0x%04x\n", priv
->pkey
);
935 static CLASS_DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
937 static ssize_t
create_child(struct class_device
*cdev
,
938 const char *buf
, size_t count
)
943 if (sscanf(buf
, "%i", &pkey
) != 1)
946 if (pkey
< 0 || pkey
> 0xffff)
950 * Set the full membership bit, so that we join the right
951 * broadcast group, etc.
955 ret
= ipoib_vlan_add(container_of(cdev
, struct net_device
, class_dev
),
958 return ret
? ret
: count
;
960 static CLASS_DEVICE_ATTR(create_child
, S_IWUGO
, NULL
, create_child
);
962 static ssize_t
delete_child(struct class_device
*cdev
,
963 const char *buf
, size_t count
)
968 if (sscanf(buf
, "%i", &pkey
) != 1)
971 if (pkey
< 0 || pkey
> 0xffff)
974 ret
= ipoib_vlan_delete(container_of(cdev
, struct net_device
, class_dev
),
977 return ret
? ret
: count
;
980 static CLASS_DEVICE_ATTR(delete_child
, S_IWUGO
, NULL
, delete_child
);
982 int ipoib_add_pkey_attr(struct net_device
*dev
)
984 return class_device_create_file(&dev
->class_dev
,
985 &class_device_attr_pkey
);
988 static struct net_device
*ipoib_add_port(const char *format
,
989 struct ib_device
*hca
, u8 port
)
991 struct ipoib_dev_priv
*priv
;
992 int result
= -ENOMEM
;
994 priv
= ipoib_intf_alloc(format
);
996 goto alloc_mem_failed
;
998 SET_NETDEV_DEV(priv
->dev
, hca
->dma_device
);
1000 result
= ib_query_pkey(hca
, port
, 0, &priv
->pkey
);
1002 printk(KERN_WARNING
"%s: ib_query_pkey port %d failed (ret = %d)\n",
1003 hca
->name
, port
, result
);
1004 goto alloc_mem_failed
;
1008 * Set the full membership bit, so that we join the right
1009 * broadcast group, etc.
1011 priv
->pkey
|= 0x8000;
1013 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
1014 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
1016 result
= ib_query_gid(hca
, port
, 0, &priv
->local_gid
);
1018 printk(KERN_WARNING
"%s: ib_query_gid port %d failed (ret = %d)\n",
1019 hca
->name
, port
, result
);
1020 goto alloc_mem_failed
;
1022 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
1025 result
= ipoib_dev_init(priv
->dev
, hca
, port
);
1027 printk(KERN_WARNING
"%s: failed to initialize port %d (ret = %d)\n",
1028 hca
->name
, port
, result
);
1029 goto device_init_failed
;
1032 INIT_IB_EVENT_HANDLER(&priv
->event_handler
,
1033 priv
->ca
, ipoib_event
);
1034 result
= ib_register_event_handler(&priv
->event_handler
);
1036 printk(KERN_WARNING
"%s: ib_register_event_handler failed for "
1037 "port %d (ret = %d)\n",
1038 hca
->name
, port
, result
);
1042 result
= register_netdev(priv
->dev
);
1044 printk(KERN_WARNING
"%s: couldn't register ipoib port %d; error %d\n",
1045 hca
->name
, port
, result
);
1046 goto register_failed
;
1049 ipoib_create_debug_files(priv
->dev
);
1051 if (ipoib_add_pkey_attr(priv
->dev
))
1053 if (class_device_create_file(&priv
->dev
->class_dev
,
1054 &class_device_attr_create_child
))
1056 if (class_device_create_file(&priv
->dev
->class_dev
,
1057 &class_device_attr_delete_child
))
1063 ipoib_delete_debug_files(priv
->dev
);
1064 unregister_netdev(priv
->dev
);
1067 ib_unregister_event_handler(&priv
->event_handler
);
1068 flush_scheduled_work();
1071 ipoib_dev_cleanup(priv
->dev
);
1074 free_netdev(priv
->dev
);
1077 return ERR_PTR(result
);
1080 static void ipoib_add_one(struct ib_device
*device
)
1082 struct list_head
*dev_list
;
1083 struct net_device
*dev
;
1084 struct ipoib_dev_priv
*priv
;
1087 dev_list
= kmalloc(sizeof *dev_list
, GFP_KERNEL
);
1091 INIT_LIST_HEAD(dev_list
);
1093 if (device
->node_type
== IB_NODE_SWITCH
) {
1098 e
= device
->phys_port_cnt
;
1101 for (p
= s
; p
<= e
; ++p
) {
1102 dev
= ipoib_add_port("ib%d", device
, p
);
1104 priv
= netdev_priv(dev
);
1105 list_add_tail(&priv
->list
, dev_list
);
1109 ib_set_client_data(device
, &ipoib_client
, dev_list
);
1112 static void ipoib_remove_one(struct ib_device
*device
)
1114 struct ipoib_dev_priv
*priv
, *tmp
;
1115 struct list_head
*dev_list
;
1117 dev_list
= ib_get_client_data(device
, &ipoib_client
);
1119 list_for_each_entry_safe(priv
, tmp
, dev_list
, list
) {
1120 ib_unregister_event_handler(&priv
->event_handler
);
1121 flush_scheduled_work();
1123 unregister_netdev(priv
->dev
);
1124 ipoib_dev_cleanup(priv
->dev
);
1125 free_netdev(priv
->dev
);
1131 static int __init
ipoib_init_module(void)
1135 ipoib_recvq_size
= roundup_pow_of_two(ipoib_recvq_size
);
1136 ipoib_recvq_size
= min(ipoib_recvq_size
, IPOIB_MAX_QUEUE_SIZE
);
1137 ipoib_recvq_size
= max(ipoib_recvq_size
, IPOIB_MIN_QUEUE_SIZE
);
1139 ipoib_sendq_size
= roundup_pow_of_two(ipoib_sendq_size
);
1140 ipoib_sendq_size
= min(ipoib_sendq_size
, IPOIB_MAX_QUEUE_SIZE
);
1141 ipoib_sendq_size
= max(ipoib_sendq_size
, IPOIB_MIN_QUEUE_SIZE
);
1143 ret
= ipoib_register_debugfs();
1148 * We create our own workqueue mainly because we want to be
1149 * able to flush it when devices are being removed. We can't
1150 * use schedule_work()/flush_scheduled_work() because both
1151 * unregister_netdev() and linkwatch_event take the rtnl lock,
1152 * so flush_scheduled_work() can deadlock during device
1155 ipoib_workqueue
= create_singlethread_workqueue("ipoib");
1156 if (!ipoib_workqueue
) {
1161 ret
= ib_register_client(&ipoib_client
);
1168 destroy_workqueue(ipoib_workqueue
);
1171 ipoib_unregister_debugfs();
1176 static void __exit
ipoib_cleanup_module(void)
1178 ib_unregister_client(&ipoib_client
);
1179 ipoib_unregister_debugfs();
1180 destroy_workqueue(ipoib_workqueue
);
1183 module_init(ipoib_init_module
);
1184 module_exit(ipoib_cleanup_module
);