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>
45 #include <linux/if_arp.h> /* For ARPHRD_xxx */
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
52 MODULE_LICENSE("Dual BSD/GPL");
54 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
55 int ipoib_debug_level
;
57 module_param_named(debug_level
, ipoib_debug_level
, int, 0644);
58 MODULE_PARM_DESC(debug_level
, "Enable debug tracing if > 0");
61 static const u8 ipv4_bcast_addr
[] = {
62 0x00, 0xff, 0xff, 0xff,
63 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
64 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
67 struct workqueue_struct
*ipoib_workqueue
;
69 static void ipoib_add_one(struct ib_device
*device
);
70 static void ipoib_remove_one(struct ib_device
*device
);
72 static struct ib_client ipoib_client
= {
75 .remove
= ipoib_remove_one
78 int ipoib_open(struct net_device
*dev
)
80 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
82 ipoib_dbg(priv
, "bringing up interface\n");
84 set_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
86 if (ipoib_pkey_dev_delay_open(dev
))
89 if (ipoib_ib_dev_open(dev
))
92 if (ipoib_ib_dev_up(dev
))
95 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
96 struct ipoib_dev_priv
*cpriv
;
98 /* Bring up any child interfaces too */
99 down(&priv
->vlan_mutex
);
100 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
103 flags
= cpriv
->dev
->flags
;
107 dev_change_flags(cpriv
->dev
, flags
| IFF_UP
);
109 up(&priv
->vlan_mutex
);
112 netif_start_queue(dev
);
117 static int ipoib_stop(struct net_device
*dev
)
119 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
121 ipoib_dbg(priv
, "stopping interface\n");
123 clear_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
125 netif_stop_queue(dev
);
127 ipoib_ib_dev_down(dev
);
128 ipoib_ib_dev_stop(dev
);
130 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
131 struct ipoib_dev_priv
*cpriv
;
133 /* Bring down any child interfaces too */
134 down(&priv
->vlan_mutex
);
135 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
138 flags
= cpriv
->dev
->flags
;
139 if (!(flags
& IFF_UP
))
142 dev_change_flags(cpriv
->dev
, flags
& ~IFF_UP
);
144 up(&priv
->vlan_mutex
);
150 static int ipoib_change_mtu(struct net_device
*dev
, int new_mtu
)
152 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
154 if (new_mtu
> IPOIB_PACKET_SIZE
- IPOIB_ENCAP_LEN
)
157 priv
->admin_mtu
= new_mtu
;
159 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
164 static struct ipoib_path
*__path_find(struct net_device
*dev
,
167 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
168 struct rb_node
*n
= priv
->path_tree
.rb_node
;
169 struct ipoib_path
*path
;
173 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
175 ret
= memcmp(gid
->raw
, path
->pathrec
.dgid
.raw
,
176 sizeof (union ib_gid
));
189 static int __path_add(struct net_device
*dev
, struct ipoib_path
*path
)
191 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
192 struct rb_node
**n
= &priv
->path_tree
.rb_node
;
193 struct rb_node
*pn
= NULL
;
194 struct ipoib_path
*tpath
;
199 tpath
= rb_entry(pn
, struct ipoib_path
, rb_node
);
201 ret
= memcmp(path
->pathrec
.dgid
.raw
, tpath
->pathrec
.dgid
.raw
,
202 sizeof (union ib_gid
));
211 rb_link_node(&path
->rb_node
, pn
, n
);
212 rb_insert_color(&path
->rb_node
, &priv
->path_tree
);
214 list_add_tail(&path
->list
, &priv
->path_list
);
219 static void path_free(struct net_device
*dev
, struct ipoib_path
*path
)
221 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
222 struct ipoib_neigh
*neigh
, *tn
;
226 while ((skb
= __skb_dequeue(&path
->queue
)))
227 dev_kfree_skb_irq(skb
);
229 spin_lock_irqsave(&priv
->lock
, flags
);
231 list_for_each_entry_safe(neigh
, tn
, &path
->neigh_list
, list
) {
233 * It's safe to call ipoib_put_ah() inside priv->lock
234 * here, because we know that path->ah will always
235 * hold one more reference, so ipoib_put_ah() will
236 * never do more than decrement the ref count.
239 ipoib_put_ah(neigh
->ah
);
240 *to_ipoib_neigh(neigh
->neighbour
) = NULL
;
241 neigh
->neighbour
->ops
->destructor
= NULL
;
245 spin_unlock_irqrestore(&priv
->lock
, flags
);
248 ipoib_put_ah(path
->ah
);
253 void ipoib_flush_paths(struct net_device
*dev
)
255 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
256 struct ipoib_path
*path
, *tp
;
257 LIST_HEAD(remove_list
);
260 spin_lock_irqsave(&priv
->lock
, flags
);
262 list_splice(&priv
->path_list
, &remove_list
);
263 INIT_LIST_HEAD(&priv
->path_list
);
265 list_for_each_entry(path
, &remove_list
, list
)
266 rb_erase(&path
->rb_node
, &priv
->path_tree
);
268 spin_unlock_irqrestore(&priv
->lock
, flags
);
270 list_for_each_entry_safe(path
, tp
, &remove_list
, list
) {
272 ib_sa_cancel_query(path
->query_id
, path
->query
);
273 wait_for_completion(&path
->done
);
274 path_free(dev
, path
);
278 static void path_rec_completion(int status
,
279 struct ib_sa_path_rec
*pathrec
,
282 struct ipoib_path
*path
= path_ptr
;
283 struct net_device
*dev
= path
->dev
;
284 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
285 struct ipoib_ah
*ah
= NULL
;
286 struct ipoib_neigh
*neigh
;
287 struct sk_buff_head skqueue
;
292 ipoib_dbg(priv
, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT
"\n",
293 be16_to_cpu(pathrec
->dlid
), IPOIB_GID_ARG(pathrec
->dgid
));
295 ipoib_dbg(priv
, "PathRec status %d for GID " IPOIB_GID_FMT
"\n",
296 status
, IPOIB_GID_ARG(path
->pathrec
.dgid
));
298 skb_queue_head_init(&skqueue
);
301 struct ib_ah_attr av
= {
302 .dlid
= be16_to_cpu(pathrec
->dlid
),
304 .port_num
= priv
->port
306 int path_rate
= ib_sa_rate_enum_to_int(pathrec
->rate
);
308 if (path_rate
> 0 && priv
->local_rate
> path_rate
)
309 av
.static_rate
= (priv
->local_rate
- 1) / path_rate
;
311 ipoib_dbg(priv
, "static_rate %d for local port %dX, path %dX\n",
312 av
.static_rate
, priv
->local_rate
,
313 ib_sa_rate_enum_to_int(pathrec
->rate
));
315 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
318 spin_lock_irqsave(&priv
->lock
, flags
);
323 path
->pathrec
= *pathrec
;
325 ipoib_dbg(priv
, "created address handle %p for LID 0x%04x, SL %d\n",
326 ah
, be16_to_cpu(pathrec
->dlid
), pathrec
->sl
);
328 while ((skb
= __skb_dequeue(&path
->queue
)))
329 __skb_queue_tail(&skqueue
, skb
);
331 list_for_each_entry(neigh
, &path
->neigh_list
, list
) {
332 kref_get(&path
->ah
->ref
);
333 neigh
->ah
= path
->ah
;
335 while ((skb
= __skb_dequeue(&neigh
->queue
)))
336 __skb_queue_tail(&skqueue
, skb
);
341 complete(&path
->done
);
343 spin_unlock_irqrestore(&priv
->lock
, flags
);
345 while ((skb
= __skb_dequeue(&skqueue
))) {
347 if (dev_queue_xmit(skb
))
348 ipoib_warn(priv
, "dev_queue_xmit failed "
349 "to requeue packet\n");
353 static struct ipoib_path
*path_rec_create(struct net_device
*dev
,
356 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
357 struct ipoib_path
*path
;
359 path
= kzalloc(sizeof *path
, GFP_ATOMIC
);
365 skb_queue_head_init(&path
->queue
);
367 INIT_LIST_HEAD(&path
->neigh_list
);
368 init_completion(&path
->done
);
370 memcpy(path
->pathrec
.dgid
.raw
, gid
->raw
, sizeof (union ib_gid
));
371 path
->pathrec
.sgid
= priv
->local_gid
;
372 path
->pathrec
.pkey
= cpu_to_be16(priv
->pkey
);
373 path
->pathrec
.numb_path
= 1;
378 static int path_rec_start(struct net_device
*dev
,
379 struct ipoib_path
*path
)
381 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
383 ipoib_dbg(priv
, "Start path record lookup for " IPOIB_GID_FMT
"\n",
384 IPOIB_GID_ARG(path
->pathrec
.dgid
));
387 ib_sa_path_rec_get(priv
->ca
, priv
->port
,
389 IB_SA_PATH_REC_DGID
|
390 IB_SA_PATH_REC_SGID
|
391 IB_SA_PATH_REC_NUMB_PATH
|
396 if (path
->query_id
< 0) {
397 ipoib_warn(priv
, "ib_sa_path_rec_get failed\n");
399 return path
->query_id
;
405 static void neigh_add_path(struct sk_buff
*skb
, struct net_device
*dev
)
407 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
408 struct ipoib_path
*path
;
409 struct ipoib_neigh
*neigh
;
411 neigh
= kmalloc(sizeof *neigh
, GFP_ATOMIC
);
413 ++priv
->stats
.tx_dropped
;
414 dev_kfree_skb_any(skb
);
418 skb_queue_head_init(&neigh
->queue
);
419 neigh
->neighbour
= skb
->dst
->neighbour
;
420 *to_ipoib_neigh(skb
->dst
->neighbour
) = neigh
;
423 * We can only be called from ipoib_start_xmit, so we're
424 * inside tx_lock -- no need to save/restore flags.
426 spin_lock(&priv
->lock
);
428 path
= __path_find(dev
, (union ib_gid
*) (skb
->dst
->neighbour
->ha
+ 4));
430 path
= path_rec_create(dev
,
431 (union ib_gid
*) (skb
->dst
->neighbour
->ha
+ 4));
435 __path_add(dev
, path
);
438 list_add_tail(&neigh
->list
, &path
->neigh_list
);
440 if (path
->pathrec
.dlid
) {
441 kref_get(&path
->ah
->ref
);
442 neigh
->ah
= path
->ah
;
444 ipoib_send(dev
, skb
, path
->ah
,
445 be32_to_cpup((__be32
*) skb
->dst
->neighbour
->ha
));
448 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
449 __skb_queue_tail(&neigh
->queue
, skb
);
451 ++priv
->stats
.tx_dropped
;
452 dev_kfree_skb_any(skb
);
455 if (!path
->query
&& path_rec_start(dev
, path
))
459 spin_unlock(&priv
->lock
);
463 *to_ipoib_neigh(skb
->dst
->neighbour
) = NULL
;
464 list_del(&neigh
->list
);
465 neigh
->neighbour
->ops
->destructor
= NULL
;
468 ++priv
->stats
.tx_dropped
;
469 dev_kfree_skb_any(skb
);
471 spin_unlock(&priv
->lock
);
474 static void ipoib_path_lookup(struct sk_buff
*skb
, struct net_device
*dev
)
476 struct ipoib_dev_priv
*priv
= netdev_priv(skb
->dev
);
478 /* Look up path record for unicasts */
479 if (skb
->dst
->neighbour
->ha
[4] != 0xff) {
480 neigh_add_path(skb
, dev
);
484 /* Add in the P_Key for multicasts */
485 skb
->dst
->neighbour
->ha
[8] = (priv
->pkey
>> 8) & 0xff;
486 skb
->dst
->neighbour
->ha
[9] = priv
->pkey
& 0xff;
487 ipoib_mcast_send(dev
, (union ib_gid
*) (skb
->dst
->neighbour
->ha
+ 4), skb
);
490 static void unicast_arp_send(struct sk_buff
*skb
, struct net_device
*dev
,
491 struct ipoib_pseudoheader
*phdr
)
493 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
494 struct ipoib_path
*path
;
497 * We can only be called from ipoib_start_xmit, so we're
498 * inside tx_lock -- no need to save/restore flags.
500 spin_lock(&priv
->lock
);
502 path
= __path_find(dev
, (union ib_gid
*) (phdr
->hwaddr
+ 4));
504 path
= path_rec_create(dev
,
505 (union ib_gid
*) (phdr
->hwaddr
+ 4));
507 /* put pseudoheader back on for next time */
508 skb_push(skb
, sizeof *phdr
);
509 __skb_queue_tail(&path
->queue
, skb
);
511 if (path_rec_start(dev
, path
)) {
512 spin_unlock(&priv
->lock
);
513 path_free(dev
, path
);
516 __path_add(dev
, path
);
518 ++priv
->stats
.tx_dropped
;
519 dev_kfree_skb_any(skb
);
522 spin_unlock(&priv
->lock
);
526 if (path
->pathrec
.dlid
) {
527 ipoib_dbg(priv
, "Send unicast ARP to %04x\n",
528 be16_to_cpu(path
->pathrec
.dlid
));
530 ipoib_send(dev
, skb
, path
->ah
,
531 be32_to_cpup((__be32
*) phdr
->hwaddr
));
532 } else if ((path
->query
|| !path_rec_start(dev
, path
)) &&
533 skb_queue_len(&path
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
534 /* put pseudoheader back on for next time */
535 skb_push(skb
, sizeof *phdr
);
536 __skb_queue_tail(&path
->queue
, skb
);
538 ++priv
->stats
.tx_dropped
;
539 dev_kfree_skb_any(skb
);
542 spin_unlock(&priv
->lock
);
545 static int ipoib_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
547 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
548 struct ipoib_neigh
*neigh
;
551 if (!spin_trylock_irqsave(&priv
->tx_lock
, flags
))
552 return NETDEV_TX_LOCKED
;
555 * Check if our queue is stopped. Since we have the LLTX bit
556 * set, we can't rely on netif_stop_queue() preventing our
557 * xmit function from being called with a full queue.
559 if (unlikely(netif_queue_stopped(dev
))) {
560 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
561 return NETDEV_TX_BUSY
;
564 if (skb
->dst
&& skb
->dst
->neighbour
) {
565 if (unlikely(!*to_ipoib_neigh(skb
->dst
->neighbour
))) {
566 ipoib_path_lookup(skb
, dev
);
570 neigh
= *to_ipoib_neigh(skb
->dst
->neighbour
);
572 if (likely(neigh
->ah
)) {
573 ipoib_send(dev
, skb
, neigh
->ah
,
574 be32_to_cpup((__be32
*) skb
->dst
->neighbour
->ha
));
578 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
579 spin_lock(&priv
->lock
);
580 __skb_queue_tail(&neigh
->queue
, skb
);
581 spin_unlock(&priv
->lock
);
583 ++priv
->stats
.tx_dropped
;
584 dev_kfree_skb_any(skb
);
587 struct ipoib_pseudoheader
*phdr
=
588 (struct ipoib_pseudoheader
*) skb
->data
;
589 skb_pull(skb
, sizeof *phdr
);
591 if (phdr
->hwaddr
[4] == 0xff) {
592 /* Add in the P_Key for multicast*/
593 phdr
->hwaddr
[8] = (priv
->pkey
>> 8) & 0xff;
594 phdr
->hwaddr
[9] = priv
->pkey
& 0xff;
596 ipoib_mcast_send(dev
, (union ib_gid
*) (phdr
->hwaddr
+ 4), skb
);
598 /* unicast GID -- should be ARP or RARP reply */
600 if ((be16_to_cpup((__be16
*) skb
->data
) != ETH_P_ARP
) &&
601 (be16_to_cpup((__be16
*) skb
->data
) != ETH_P_RARP
)) {
602 ipoib_warn(priv
, "Unicast, no %s: type %04x, QPN %06x "
604 skb
->dst
? "neigh" : "dst",
605 be16_to_cpup((__be16
*) skb
->data
),
606 be32_to_cpup((__be32
*) phdr
->hwaddr
),
607 IPOIB_GID_ARG(*(union ib_gid
*) (phdr
->hwaddr
+ 4)));
608 dev_kfree_skb_any(skb
);
609 ++priv
->stats
.tx_dropped
;
613 unicast_arp_send(skb
, dev
, phdr
);
618 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
623 static struct net_device_stats
*ipoib_get_stats(struct net_device
*dev
)
625 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
630 static void ipoib_timeout(struct net_device
*dev
)
632 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
634 ipoib_warn(priv
, "transmit timeout: latency %d msecs\n",
635 jiffies_to_msecs(jiffies
- dev
->trans_start
));
636 ipoib_warn(priv
, "queue stopped %d, tx_head %u, tx_tail %u\n",
637 netif_queue_stopped(dev
),
638 priv
->tx_head
, priv
->tx_tail
);
639 /* XXX reset QP, etc. */
642 static int ipoib_hard_header(struct sk_buff
*skb
,
643 struct net_device
*dev
,
645 void *daddr
, void *saddr
, unsigned len
)
647 struct ipoib_header
*header
;
649 header
= (struct ipoib_header
*) skb_push(skb
, sizeof *header
);
651 header
->proto
= htons(type
);
652 header
->reserved
= 0;
655 * If we don't have a neighbour structure, stuff the
656 * destination address onto the front of the skb so we can
657 * figure out where to send the packet later.
659 if (!skb
->dst
|| !skb
->dst
->neighbour
) {
660 struct ipoib_pseudoheader
*phdr
=
661 (struct ipoib_pseudoheader
*) skb_push(skb
, sizeof *phdr
);
662 memcpy(phdr
->hwaddr
, daddr
, INFINIBAND_ALEN
);
668 static void ipoib_set_mcast_list(struct net_device
*dev
)
670 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
672 queue_work(ipoib_workqueue
, &priv
->restart_task
);
675 static void ipoib_neigh_destructor(struct neighbour
*n
)
677 struct ipoib_neigh
*neigh
;
678 struct ipoib_dev_priv
*priv
= netdev_priv(n
->dev
);
680 struct ipoib_ah
*ah
= NULL
;
683 "neigh_destructor for %06x " IPOIB_GID_FMT
"\n",
684 be32_to_cpup((__be32
*) n
->ha
),
685 IPOIB_GID_ARG(*((union ib_gid
*) (n
->ha
+ 4))));
687 spin_lock_irqsave(&priv
->lock
, flags
);
689 neigh
= *to_ipoib_neigh(n
);
693 list_del(&neigh
->list
);
694 *to_ipoib_neigh(n
) = NULL
;
698 spin_unlock_irqrestore(&priv
->lock
, flags
);
704 static int ipoib_neigh_setup(struct neighbour
*neigh
)
707 * Is this kosher? I can't find anybody in the kernel that
708 * sets neigh->destructor, so we should be able to set it here
711 neigh
->ops
->destructor
= ipoib_neigh_destructor
;
716 static int ipoib_neigh_setup_dev(struct net_device
*dev
, struct neigh_parms
*parms
)
718 parms
->neigh_setup
= ipoib_neigh_setup
;
723 int ipoib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
725 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
727 /* Allocate RX/TX "rings" to hold queued skbs */
729 priv
->rx_ring
= kzalloc(IPOIB_RX_RING_SIZE
* sizeof (struct ipoib_rx_buf
),
731 if (!priv
->rx_ring
) {
732 printk(KERN_WARNING
"%s: failed to allocate RX ring (%d entries)\n",
733 ca
->name
, IPOIB_RX_RING_SIZE
);
737 priv
->tx_ring
= kzalloc(IPOIB_TX_RING_SIZE
* sizeof (struct ipoib_tx_buf
),
739 if (!priv
->tx_ring
) {
740 printk(KERN_WARNING
"%s: failed to allocate TX ring (%d entries)\n",
741 ca
->name
, IPOIB_TX_RING_SIZE
);
742 goto out_rx_ring_cleanup
;
745 /* priv->tx_head & tx_tail are already 0 */
747 if (ipoib_ib_dev_init(dev
, ca
, port
))
748 goto out_tx_ring_cleanup
;
753 kfree(priv
->tx_ring
);
756 kfree(priv
->rx_ring
);
762 void ipoib_dev_cleanup(struct net_device
*dev
)
764 struct ipoib_dev_priv
*priv
= netdev_priv(dev
), *cpriv
, *tcpriv
;
766 ipoib_delete_debug_file(dev
);
768 /* Delete any child interfaces first */
769 list_for_each_entry_safe(cpriv
, tcpriv
, &priv
->child_intfs
, list
) {
770 unregister_netdev(cpriv
->dev
);
771 ipoib_dev_cleanup(cpriv
->dev
);
772 free_netdev(cpriv
->dev
);
775 ipoib_ib_dev_cleanup(dev
);
777 kfree(priv
->rx_ring
);
778 kfree(priv
->tx_ring
);
780 priv
->rx_ring
= NULL
;
781 priv
->tx_ring
= NULL
;
784 static void ipoib_setup(struct net_device
*dev
)
786 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
788 dev
->open
= ipoib_open
;
789 dev
->stop
= ipoib_stop
;
790 dev
->change_mtu
= ipoib_change_mtu
;
791 dev
->hard_start_xmit
= ipoib_start_xmit
;
792 dev
->get_stats
= ipoib_get_stats
;
793 dev
->tx_timeout
= ipoib_timeout
;
794 dev
->hard_header
= ipoib_hard_header
;
795 dev
->set_multicast_list
= ipoib_set_mcast_list
;
796 dev
->neigh_setup
= ipoib_neigh_setup_dev
;
798 dev
->watchdog_timeo
= HZ
;
800 dev
->flags
|= IFF_BROADCAST
| IFF_MULTICAST
;
803 * We add in INFINIBAND_ALEN to allow for the destination
804 * address "pseudoheader" for skbs without neighbour struct.
806 dev
->hard_header_len
= IPOIB_ENCAP_LEN
+ INFINIBAND_ALEN
;
807 dev
->addr_len
= INFINIBAND_ALEN
;
808 dev
->type
= ARPHRD_INFINIBAND
;
809 dev
->tx_queue_len
= IPOIB_TX_RING_SIZE
* 2;
810 dev
->features
= NETIF_F_VLAN_CHALLENGED
| NETIF_F_LLTX
;
812 /* MTU will be reset when mcast join happens */
813 dev
->mtu
= IPOIB_PACKET_SIZE
- IPOIB_ENCAP_LEN
;
814 priv
->mcast_mtu
= priv
->admin_mtu
= dev
->mtu
;
816 memcpy(dev
->broadcast
, ipv4_bcast_addr
, INFINIBAND_ALEN
);
818 netif_carrier_off(dev
);
820 SET_MODULE_OWNER(dev
);
824 spin_lock_init(&priv
->lock
);
825 spin_lock_init(&priv
->tx_lock
);
827 init_MUTEX(&priv
->mcast_mutex
);
828 init_MUTEX(&priv
->vlan_mutex
);
830 INIT_LIST_HEAD(&priv
->path_list
);
831 INIT_LIST_HEAD(&priv
->child_intfs
);
832 INIT_LIST_HEAD(&priv
->dead_ahs
);
833 INIT_LIST_HEAD(&priv
->multicast_list
);
835 INIT_WORK(&priv
->pkey_task
, ipoib_pkey_poll
, priv
->dev
);
836 INIT_WORK(&priv
->mcast_task
, ipoib_mcast_join_task
, priv
->dev
);
837 INIT_WORK(&priv
->flush_task
, ipoib_ib_dev_flush
, priv
->dev
);
838 INIT_WORK(&priv
->restart_task
, ipoib_mcast_restart_task
, priv
->dev
);
839 INIT_WORK(&priv
->ah_reap_task
, ipoib_reap_ah
, priv
->dev
);
842 struct ipoib_dev_priv
*ipoib_intf_alloc(const char *name
)
844 struct net_device
*dev
;
846 dev
= alloc_netdev((int) sizeof (struct ipoib_dev_priv
), name
,
851 return netdev_priv(dev
);
854 static ssize_t
show_pkey(struct class_device
*cdev
, char *buf
)
856 struct ipoib_dev_priv
*priv
=
857 netdev_priv(container_of(cdev
, struct net_device
, class_dev
));
859 return sprintf(buf
, "0x%04x\n", priv
->pkey
);
861 static CLASS_DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
863 static ssize_t
create_child(struct class_device
*cdev
,
864 const char *buf
, size_t count
)
869 if (sscanf(buf
, "%i", &pkey
) != 1)
872 if (pkey
< 0 || pkey
> 0xffff)
876 * Set the full membership bit, so that we join the right
877 * broadcast group, etc.
881 ret
= ipoib_vlan_add(container_of(cdev
, struct net_device
, class_dev
),
884 return ret
? ret
: count
;
886 static CLASS_DEVICE_ATTR(create_child
, S_IWUGO
, NULL
, create_child
);
888 static ssize_t
delete_child(struct class_device
*cdev
,
889 const char *buf
, size_t count
)
894 if (sscanf(buf
, "%i", &pkey
) != 1)
897 if (pkey
< 0 || pkey
> 0xffff)
900 ret
= ipoib_vlan_delete(container_of(cdev
, struct net_device
, class_dev
),
903 return ret
? ret
: count
;
906 static CLASS_DEVICE_ATTR(delete_child
, S_IWUGO
, NULL
, delete_child
);
908 int ipoib_add_pkey_attr(struct net_device
*dev
)
910 return class_device_create_file(&dev
->class_dev
,
911 &class_device_attr_pkey
);
914 static struct net_device
*ipoib_add_port(const char *format
,
915 struct ib_device
*hca
, u8 port
)
917 struct ipoib_dev_priv
*priv
;
918 int result
= -ENOMEM
;
920 priv
= ipoib_intf_alloc(format
);
922 goto alloc_mem_failed
;
924 SET_NETDEV_DEV(priv
->dev
, hca
->dma_device
);
926 result
= ib_query_pkey(hca
, port
, 0, &priv
->pkey
);
928 printk(KERN_WARNING
"%s: ib_query_pkey port %d failed (ret = %d)\n",
929 hca
->name
, port
, result
);
930 goto alloc_mem_failed
;
934 * Set the full membership bit, so that we join the right
935 * broadcast group, etc.
937 priv
->pkey
|= 0x8000;
939 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
940 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
942 result
= ib_query_gid(hca
, port
, 0, &priv
->local_gid
);
944 printk(KERN_WARNING
"%s: ib_query_gid port %d failed (ret = %d)\n",
945 hca
->name
, port
, result
);
946 goto alloc_mem_failed
;
948 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
951 result
= ipoib_dev_init(priv
->dev
, hca
, port
);
953 printk(KERN_WARNING
"%s: failed to initialize port %d (ret = %d)\n",
954 hca
->name
, port
, result
);
955 goto device_init_failed
;
958 INIT_IB_EVENT_HANDLER(&priv
->event_handler
,
959 priv
->ca
, ipoib_event
);
960 result
= ib_register_event_handler(&priv
->event_handler
);
962 printk(KERN_WARNING
"%s: ib_register_event_handler failed for "
963 "port %d (ret = %d)\n",
964 hca
->name
, port
, result
);
968 result
= register_netdev(priv
->dev
);
970 printk(KERN_WARNING
"%s: couldn't register ipoib port %d; error %d\n",
971 hca
->name
, port
, result
);
972 goto register_failed
;
975 if (ipoib_create_debug_file(priv
->dev
))
978 if (ipoib_add_pkey_attr(priv
->dev
))
980 if (class_device_create_file(&priv
->dev
->class_dev
,
981 &class_device_attr_create_child
))
983 if (class_device_create_file(&priv
->dev
->class_dev
,
984 &class_device_attr_delete_child
))
990 ipoib_delete_debug_file(priv
->dev
);
993 unregister_netdev(priv
->dev
);
996 ib_unregister_event_handler(&priv
->event_handler
);
997 flush_scheduled_work();
1000 ipoib_dev_cleanup(priv
->dev
);
1003 free_netdev(priv
->dev
);
1006 return ERR_PTR(result
);
1009 static void ipoib_add_one(struct ib_device
*device
)
1011 struct list_head
*dev_list
;
1012 struct net_device
*dev
;
1013 struct ipoib_dev_priv
*priv
;
1016 dev_list
= kmalloc(sizeof *dev_list
, GFP_KERNEL
);
1020 INIT_LIST_HEAD(dev_list
);
1022 if (device
->node_type
== IB_NODE_SWITCH
) {
1027 e
= device
->phys_port_cnt
;
1030 for (p
= s
; p
<= e
; ++p
) {
1031 dev
= ipoib_add_port("ib%d", device
, p
);
1033 priv
= netdev_priv(dev
);
1034 list_add_tail(&priv
->list
, dev_list
);
1038 ib_set_client_data(device
, &ipoib_client
, dev_list
);
1041 static void ipoib_remove_one(struct ib_device
*device
)
1043 struct ipoib_dev_priv
*priv
, *tmp
;
1044 struct list_head
*dev_list
;
1046 dev_list
= ib_get_client_data(device
, &ipoib_client
);
1048 list_for_each_entry_safe(priv
, tmp
, dev_list
, list
) {
1049 ib_unregister_event_handler(&priv
->event_handler
);
1050 flush_scheduled_work();
1052 unregister_netdev(priv
->dev
);
1053 ipoib_dev_cleanup(priv
->dev
);
1054 free_netdev(priv
->dev
);
1060 static int __init
ipoib_init_module(void)
1064 ret
= ipoib_register_debugfs();
1069 * We create our own workqueue mainly because we want to be
1070 * able to flush it when devices are being removed. We can't
1071 * use schedule_work()/flush_scheduled_work() because both
1072 * unregister_netdev() and linkwatch_event take the rtnl lock,
1073 * so flush_scheduled_work() can deadlock during device
1076 ipoib_workqueue
= create_singlethread_workqueue("ipoib");
1077 if (!ipoib_workqueue
) {
1082 ret
= ib_register_client(&ipoib_client
);
1089 destroy_workqueue(ipoib_workqueue
);
1092 ipoib_unregister_debugfs();
1097 static void __exit
ipoib_cleanup_module(void)
1099 ib_unregister_client(&ipoib_client
);
1100 ipoib_unregister_debugfs();
1101 destroy_workqueue(ipoib_workqueue
);
1104 module_init(ipoib_init_module
);
1105 module_exit(ipoib_cleanup_module
);