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
37 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/slab.h>
41 #include <linux/kernel.h>
42 #include <linux/vmalloc.h>
44 #include <linux/if_arp.h> /* For ARPHRD_xxx */
49 #include <linux/jhash.h>
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
);
88 static void ipoib_neigh_reclaim(struct rcu_head
*rp
);
90 static struct ib_client ipoib_client
= {
93 .remove
= ipoib_remove_one
96 int ipoib_open(struct net_device
*dev
)
98 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
100 ipoib_dbg(priv
, "bringing up interface\n");
102 set_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
104 if (ipoib_pkey_dev_delay_open(dev
))
107 if (ipoib_ib_dev_open(dev
))
110 if (ipoib_ib_dev_up(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 ipoib_ib_dev_stop(dev
, 1);
138 clear_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
143 static int ipoib_stop(struct net_device
*dev
)
145 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
147 ipoib_dbg(priv
, "stopping interface\n");
149 clear_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
151 netif_stop_queue(dev
);
153 ipoib_ib_dev_down(dev
, 0);
154 ipoib_ib_dev_stop(dev
, 0);
156 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
157 struct ipoib_dev_priv
*cpriv
;
159 /* Bring down any child interfaces too */
160 mutex_lock(&priv
->vlan_mutex
);
161 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
164 flags
= cpriv
->dev
->flags
;
165 if (!(flags
& IFF_UP
))
168 dev_change_flags(cpriv
->dev
, flags
& ~IFF_UP
);
170 mutex_unlock(&priv
->vlan_mutex
);
176 static void ipoib_uninit(struct net_device
*dev
)
178 ipoib_dev_cleanup(dev
);
181 static netdev_features_t
ipoib_fix_features(struct net_device
*dev
, netdev_features_t features
)
183 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
185 if (test_bit(IPOIB_FLAG_ADMIN_CM
, &priv
->flags
))
186 features
&= ~(NETIF_F_SG
| NETIF_F_IP_CSUM
| NETIF_F_TSO
);
191 static int ipoib_change_mtu(struct net_device
*dev
, int new_mtu
)
193 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
195 /* dev->mtu > 2K ==> connected mode */
196 if (ipoib_cm_admin_enabled(dev
)) {
197 if (new_mtu
> ipoib_cm_max_mtu(dev
))
200 if (new_mtu
> priv
->mcast_mtu
)
201 ipoib_warn(priv
, "mtu > %d will cause multicast packet drops.\n",
208 if (new_mtu
> IPOIB_UD_MTU(priv
->max_ib_mtu
))
211 priv
->admin_mtu
= new_mtu
;
213 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
218 static struct ipoib_path
*__path_find(struct net_device
*dev
, void *gid
)
220 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
221 struct rb_node
*n
= priv
->path_tree
.rb_node
;
222 struct ipoib_path
*path
;
226 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
228 ret
= memcmp(gid
, path
->pathrec
.dgid
.raw
,
229 sizeof (union ib_gid
));
242 static int __path_add(struct net_device
*dev
, struct ipoib_path
*path
)
244 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
245 struct rb_node
**n
= &priv
->path_tree
.rb_node
;
246 struct rb_node
*pn
= NULL
;
247 struct ipoib_path
*tpath
;
252 tpath
= rb_entry(pn
, struct ipoib_path
, rb_node
);
254 ret
= memcmp(path
->pathrec
.dgid
.raw
, tpath
->pathrec
.dgid
.raw
,
255 sizeof (union ib_gid
));
264 rb_link_node(&path
->rb_node
, pn
, n
);
265 rb_insert_color(&path
->rb_node
, &priv
->path_tree
);
267 list_add_tail(&path
->list
, &priv
->path_list
);
272 static void path_free(struct net_device
*dev
, struct ipoib_path
*path
)
276 while ((skb
= __skb_dequeue(&path
->queue
)))
277 dev_kfree_skb_irq(skb
);
279 ipoib_dbg(netdev_priv(dev
), "path_free\n");
281 /* remove all neigh connected to this path */
282 ipoib_del_neighs_by_gid(dev
, path
->pathrec
.dgid
.raw
);
285 ipoib_put_ah(path
->ah
);
290 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
292 struct ipoib_path_iter
*ipoib_path_iter_init(struct net_device
*dev
)
294 struct ipoib_path_iter
*iter
;
296 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
301 memset(iter
->path
.pathrec
.dgid
.raw
, 0, 16);
303 if (ipoib_path_iter_next(iter
)) {
311 int ipoib_path_iter_next(struct ipoib_path_iter
*iter
)
313 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
315 struct ipoib_path
*path
;
318 spin_lock_irq(&priv
->lock
);
320 n
= rb_first(&priv
->path_tree
);
323 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
325 if (memcmp(iter
->path
.pathrec
.dgid
.raw
, path
->pathrec
.dgid
.raw
,
326 sizeof (union ib_gid
)) < 0) {
335 spin_unlock_irq(&priv
->lock
);
340 void ipoib_path_iter_read(struct ipoib_path_iter
*iter
,
341 struct ipoib_path
*path
)
346 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
348 void ipoib_mark_paths_invalid(struct net_device
*dev
)
350 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
351 struct ipoib_path
*path
, *tp
;
353 spin_lock_irq(&priv
->lock
);
355 list_for_each_entry_safe(path
, tp
, &priv
->path_list
, list
) {
356 ipoib_dbg(priv
, "mark path LID 0x%04x GID %pI6 invalid\n",
357 be16_to_cpu(path
->pathrec
.dlid
),
358 path
->pathrec
.dgid
.raw
);
362 spin_unlock_irq(&priv
->lock
);
365 void ipoib_flush_paths(struct net_device
*dev
)
367 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
368 struct ipoib_path
*path
, *tp
;
369 LIST_HEAD(remove_list
);
372 netif_tx_lock_bh(dev
);
373 spin_lock_irqsave(&priv
->lock
, flags
);
375 list_splice_init(&priv
->path_list
, &remove_list
);
377 list_for_each_entry(path
, &remove_list
, list
)
378 rb_erase(&path
->rb_node
, &priv
->path_tree
);
380 list_for_each_entry_safe(path
, tp
, &remove_list
, list
) {
382 ib_sa_cancel_query(path
->query_id
, path
->query
);
383 spin_unlock_irqrestore(&priv
->lock
, flags
);
384 netif_tx_unlock_bh(dev
);
385 wait_for_completion(&path
->done
);
386 path_free(dev
, path
);
387 netif_tx_lock_bh(dev
);
388 spin_lock_irqsave(&priv
->lock
, flags
);
391 spin_unlock_irqrestore(&priv
->lock
, flags
);
392 netif_tx_unlock_bh(dev
);
395 static void path_rec_completion(int status
,
396 struct ib_sa_path_rec
*pathrec
,
399 struct ipoib_path
*path
= path_ptr
;
400 struct net_device
*dev
= path
->dev
;
401 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
402 struct ipoib_ah
*ah
= NULL
;
403 struct ipoib_ah
*old_ah
= NULL
;
404 struct ipoib_neigh
*neigh
, *tn
;
405 struct sk_buff_head skqueue
;
410 ipoib_dbg(priv
, "PathRec LID 0x%04x for GID %pI6\n",
411 be16_to_cpu(pathrec
->dlid
), pathrec
->dgid
.raw
);
413 ipoib_dbg(priv
, "PathRec status %d for GID %pI6\n",
414 status
, path
->pathrec
.dgid
.raw
);
416 skb_queue_head_init(&skqueue
);
419 struct ib_ah_attr av
;
421 if (!ib_init_ah_from_path(priv
->ca
, priv
->port
, pathrec
, &av
))
422 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
425 spin_lock_irqsave(&priv
->lock
, flags
);
427 if (!IS_ERR_OR_NULL(ah
)) {
428 path
->pathrec
= *pathrec
;
433 ipoib_dbg(priv
, "created address handle %p for LID 0x%04x, SL %d\n",
434 ah
, be16_to_cpu(pathrec
->dlid
), pathrec
->sl
);
436 while ((skb
= __skb_dequeue(&path
->queue
)))
437 __skb_queue_tail(&skqueue
, skb
);
439 list_for_each_entry_safe(neigh
, tn
, &path
->neigh_list
, list
) {
441 WARN_ON(neigh
->ah
!= old_ah
);
443 * Dropping the ah reference inside
444 * priv->lock is safe here, because we
445 * will hold one more reference from
446 * the original value of path->ah (ie
449 ipoib_put_ah(neigh
->ah
);
451 kref_get(&path
->ah
->ref
);
452 neigh
->ah
= path
->ah
;
454 if (ipoib_cm_enabled(dev
, neigh
->daddr
)) {
455 if (!ipoib_cm_get(neigh
))
456 ipoib_cm_set(neigh
, ipoib_cm_create_tx(dev
,
459 if (!ipoib_cm_get(neigh
)) {
460 list_del(&neigh
->list
);
461 ipoib_neigh_free(neigh
);
466 while ((skb
= __skb_dequeue(&neigh
->queue
)))
467 __skb_queue_tail(&skqueue
, skb
);
473 complete(&path
->done
);
475 spin_unlock_irqrestore(&priv
->lock
, flags
);
478 ipoib_put_ah(old_ah
);
480 while ((skb
= __skb_dequeue(&skqueue
))) {
482 if (dev_queue_xmit(skb
))
483 ipoib_warn(priv
, "dev_queue_xmit failed "
484 "to requeue packet\n");
488 static struct ipoib_path
*path_rec_create(struct net_device
*dev
, void *gid
)
490 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
491 struct ipoib_path
*path
;
493 if (!priv
->broadcast
)
496 path
= kzalloc(sizeof *path
, GFP_ATOMIC
);
502 skb_queue_head_init(&path
->queue
);
504 INIT_LIST_HEAD(&path
->neigh_list
);
506 memcpy(path
->pathrec
.dgid
.raw
, gid
, sizeof (union ib_gid
));
507 path
->pathrec
.sgid
= priv
->local_gid
;
508 path
->pathrec
.pkey
= cpu_to_be16(priv
->pkey
);
509 path
->pathrec
.numb_path
= 1;
510 path
->pathrec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
515 static int path_rec_start(struct net_device
*dev
,
516 struct ipoib_path
*path
)
518 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
520 ipoib_dbg(priv
, "Start path record lookup for %pI6\n",
521 path
->pathrec
.dgid
.raw
);
523 init_completion(&path
->done
);
526 ib_sa_path_rec_get(&ipoib_sa_client
, priv
->ca
, priv
->port
,
528 IB_SA_PATH_REC_DGID
|
529 IB_SA_PATH_REC_SGID
|
530 IB_SA_PATH_REC_NUMB_PATH
|
531 IB_SA_PATH_REC_TRAFFIC_CLASS
|
536 if (path
->query_id
< 0) {
537 ipoib_warn(priv
, "ib_sa_path_rec_get failed: %d\n", path
->query_id
);
539 complete(&path
->done
);
540 return path
->query_id
;
546 static void neigh_add_path(struct sk_buff
*skb
, u8
*daddr
,
547 struct net_device
*dev
)
549 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
550 struct ipoib_path
*path
;
551 struct ipoib_neigh
*neigh
;
554 spin_lock_irqsave(&priv
->lock
, flags
);
555 neigh
= ipoib_neigh_alloc(daddr
, dev
);
557 spin_unlock_irqrestore(&priv
->lock
, flags
);
558 ++dev
->stats
.tx_dropped
;
559 dev_kfree_skb_any(skb
);
563 path
= __path_find(dev
, daddr
+ 4);
565 path
= path_rec_create(dev
, daddr
+ 4);
569 __path_add(dev
, path
);
572 list_add_tail(&neigh
->list
, &path
->neigh_list
);
575 kref_get(&path
->ah
->ref
);
576 neigh
->ah
= path
->ah
;
578 if (ipoib_cm_enabled(dev
, neigh
->daddr
)) {
579 if (!ipoib_cm_get(neigh
))
580 ipoib_cm_set(neigh
, ipoib_cm_create_tx(dev
, path
, neigh
));
581 if (!ipoib_cm_get(neigh
)) {
582 list_del(&neigh
->list
);
583 ipoib_neigh_free(neigh
);
586 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
)
587 __skb_queue_tail(&neigh
->queue
, skb
);
589 ipoib_warn(priv
, "queue length limit %d. Packet drop.\n",
590 skb_queue_len(&neigh
->queue
));
594 spin_unlock_irqrestore(&priv
->lock
, flags
);
595 ipoib_send(dev
, skb
, path
->ah
, IPOIB_QPN(daddr
));
596 ipoib_neigh_put(neigh
);
602 if (!path
->query
&& path_rec_start(dev
, path
))
605 __skb_queue_tail(&neigh
->queue
, skb
);
608 spin_unlock_irqrestore(&priv
->lock
, flags
);
609 ipoib_neigh_put(neigh
);
613 list_del(&neigh
->list
);
616 ipoib_neigh_free(neigh
);
618 ++dev
->stats
.tx_dropped
;
619 dev_kfree_skb_any(skb
);
621 spin_unlock_irqrestore(&priv
->lock
, flags
);
622 ipoib_neigh_put(neigh
);
625 static void unicast_arp_send(struct sk_buff
*skb
, struct net_device
*dev
,
628 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
629 struct ipoib_path
*path
;
632 spin_lock_irqsave(&priv
->lock
, flags
);
634 path
= __path_find(dev
, cb
->hwaddr
+ 4);
635 if (!path
|| !path
->valid
) {
639 path
= path_rec_create(dev
, cb
->hwaddr
+ 4);
643 __skb_queue_tail(&path
->queue
, skb
);
645 if (!path
->query
&& path_rec_start(dev
, path
)) {
646 spin_unlock_irqrestore(&priv
->lock
, flags
);
648 path_free(dev
, path
);
651 __path_add(dev
, path
);
653 ++dev
->stats
.tx_dropped
;
654 dev_kfree_skb_any(skb
);
657 spin_unlock_irqrestore(&priv
->lock
, flags
);
662 ipoib_dbg(priv
, "Send unicast ARP to %04x\n",
663 be16_to_cpu(path
->pathrec
.dlid
));
665 spin_unlock_irqrestore(&priv
->lock
, flags
);
666 ipoib_send(dev
, skb
, path
->ah
, IPOIB_QPN(cb
->hwaddr
));
668 } else if ((path
->query
|| !path_rec_start(dev
, path
)) &&
669 skb_queue_len(&path
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
670 __skb_queue_tail(&path
->queue
, skb
);
672 ++dev
->stats
.tx_dropped
;
673 dev_kfree_skb_any(skb
);
676 spin_unlock_irqrestore(&priv
->lock
, flags
);
679 static int ipoib_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
681 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
682 struct ipoib_neigh
*neigh
;
683 struct ipoib_cb
*cb
= (struct ipoib_cb
*) skb
->cb
;
684 struct ipoib_header
*header
;
687 header
= (struct ipoib_header
*) skb
->data
;
689 if (unlikely(cb
->hwaddr
[4] == 0xff)) {
690 /* multicast, arrange "if" according to probability */
691 if ((header
->proto
!= htons(ETH_P_IP
)) &&
692 (header
->proto
!= htons(ETH_P_IPV6
)) &&
693 (header
->proto
!= htons(ETH_P_ARP
)) &&
694 (header
->proto
!= htons(ETH_P_RARP
))) {
695 /* ethertype not supported by IPoIB */
696 ++dev
->stats
.tx_dropped
;
697 dev_kfree_skb_any(skb
);
700 /* Add in the P_Key for multicast*/
701 cb
->hwaddr
[8] = (priv
->pkey
>> 8) & 0xff;
702 cb
->hwaddr
[9] = priv
->pkey
& 0xff;
704 neigh
= ipoib_neigh_get(dev
, cb
->hwaddr
);
706 goto send_using_neigh
;
707 ipoib_mcast_send(dev
, cb
->hwaddr
, skb
);
711 /* unicast, arrange "switch" according to probability */
712 switch (header
->proto
) {
713 case htons(ETH_P_IP
):
714 case htons(ETH_P_IPV6
):
715 neigh
= ipoib_neigh_get(dev
, cb
->hwaddr
);
716 if (unlikely(!neigh
)) {
717 neigh_add_path(skb
, cb
->hwaddr
, dev
);
721 case htons(ETH_P_ARP
):
722 case htons(ETH_P_RARP
):
723 /* for unicast ARP and RARP should always perform path find */
724 unicast_arp_send(skb
, dev
, cb
);
727 /* ethertype not supported by IPoIB */
728 ++dev
->stats
.tx_dropped
;
729 dev_kfree_skb_any(skb
);
734 /* note we now hold a ref to neigh */
735 if (ipoib_cm_get(neigh
)) {
736 if (ipoib_cm_up(neigh
)) {
737 ipoib_cm_send(dev
, skb
, ipoib_cm_get(neigh
));
740 } else if (neigh
->ah
) {
741 ipoib_send(dev
, skb
, neigh
->ah
, IPOIB_QPN(cb
->hwaddr
));
745 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
746 spin_lock_irqsave(&priv
->lock
, flags
);
747 __skb_queue_tail(&neigh
->queue
, skb
);
748 spin_unlock_irqrestore(&priv
->lock
, flags
);
750 ++dev
->stats
.tx_dropped
;
751 dev_kfree_skb_any(skb
);
755 ipoib_neigh_put(neigh
);
760 static void ipoib_timeout(struct net_device
*dev
)
762 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
764 ipoib_warn(priv
, "transmit timeout: latency %d msecs\n",
765 jiffies_to_msecs(jiffies
- dev
->trans_start
));
766 ipoib_warn(priv
, "queue stopped %d, tx_head %u, tx_tail %u\n",
767 netif_queue_stopped(dev
),
768 priv
->tx_head
, priv
->tx_tail
);
769 /* XXX reset QP, etc. */
772 static int ipoib_hard_header(struct sk_buff
*skb
,
773 struct net_device
*dev
,
775 const void *daddr
, const void *saddr
, unsigned len
)
777 struct ipoib_header
*header
;
778 struct ipoib_cb
*cb
= (struct ipoib_cb
*) skb
->cb
;
780 header
= (struct ipoib_header
*) skb_push(skb
, sizeof *header
);
782 header
->proto
= htons(type
);
783 header
->reserved
= 0;
786 * we don't rely on dst_entry structure, always stuff the
787 * destination address into skb->cb so we can figure out where
788 * to send the packet later.
790 memcpy(cb
->hwaddr
, daddr
, INFINIBAND_ALEN
);
795 static void ipoib_set_mcast_list(struct net_device
*dev
)
797 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
799 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
800 ipoib_dbg(priv
, "IPOIB_FLAG_OPER_UP not set");
804 queue_work(ipoib_workqueue
, &priv
->restart_task
);
807 static u32
ipoib_addr_hash(struct ipoib_neigh_hash
*htbl
, u8
*daddr
)
810 * Use only the address parts that contributes to spreading
811 * The subnet prefix is not used as one can not connect to
812 * same remote port (GUID) using the same remote QPN via two
815 /* qpn octets[1:4) & port GUID octets[12:20) */
816 u32
*daddr_32
= (u32
*) daddr
;
819 hv
= jhash_3words(daddr_32
[3], daddr_32
[4], 0xFFFFFF & daddr_32
[0], 0);
820 return hv
& htbl
->mask
;
823 struct ipoib_neigh
*ipoib_neigh_get(struct net_device
*dev
, u8
*daddr
)
825 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
826 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
827 struct ipoib_neigh_hash
*htbl
;
828 struct ipoib_neigh
*neigh
= NULL
;
833 htbl
= rcu_dereference_bh(ntbl
->htbl
);
838 hash_val
= ipoib_addr_hash(htbl
, daddr
);
839 for (neigh
= rcu_dereference_bh(htbl
->buckets
[hash_val
]);
841 neigh
= rcu_dereference_bh(neigh
->hnext
)) {
842 if (memcmp(daddr
, neigh
->daddr
, INFINIBAND_ALEN
) == 0) {
843 /* found, take one ref on behalf of the caller */
844 if (!atomic_inc_not_zero(&neigh
->refcnt
)) {
849 neigh
->alive
= jiffies
;
855 rcu_read_unlock_bh();
859 static void __ipoib_reap_neigh(struct ipoib_dev_priv
*priv
)
861 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
862 struct ipoib_neigh_hash
*htbl
;
863 unsigned long neigh_obsolete
;
868 if (test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
871 spin_lock_irqsave(&priv
->lock
, flags
);
873 htbl
= rcu_dereference_protected(ntbl
->htbl
,
874 lockdep_is_held(&priv
->lock
));
879 /* neigh is obsolete if it was idle for two GC periods */
880 dt
= 2 * arp_tbl
.gc_interval
;
881 neigh_obsolete
= jiffies
- dt
;
882 /* handle possible race condition */
883 if (test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
886 for (i
= 0; i
< htbl
->size
; i
++) {
887 struct ipoib_neigh
*neigh
;
888 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
890 while ((neigh
= rcu_dereference_protected(*np
,
891 lockdep_is_held(&priv
->lock
))) != NULL
) {
892 /* was the neigh idle for two GC periods */
893 if (time_after(neigh_obsolete
, neigh
->alive
)) {
894 rcu_assign_pointer(*np
,
895 rcu_dereference_protected(neigh
->hnext
,
896 lockdep_is_held(&priv
->lock
)));
897 /* remove from path/mc list */
898 list_del(&neigh
->list
);
899 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
908 spin_unlock_irqrestore(&priv
->lock
, flags
);
911 static void ipoib_reap_neigh(struct work_struct
*work
)
913 struct ipoib_dev_priv
*priv
=
914 container_of(work
, struct ipoib_dev_priv
, neigh_reap_task
.work
);
916 __ipoib_reap_neigh(priv
);
918 if (!test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
919 queue_delayed_work(ipoib_workqueue
, &priv
->neigh_reap_task
,
920 arp_tbl
.gc_interval
);
924 static struct ipoib_neigh
*ipoib_neigh_ctor(u8
*daddr
,
925 struct net_device
*dev
)
927 struct ipoib_neigh
*neigh
;
929 neigh
= kzalloc(sizeof *neigh
, GFP_ATOMIC
);
934 memcpy(&neigh
->daddr
, daddr
, sizeof(neigh
->daddr
));
935 skb_queue_head_init(&neigh
->queue
);
936 INIT_LIST_HEAD(&neigh
->list
);
937 ipoib_cm_set(neigh
, NULL
);
938 /* one ref on behalf of the caller */
939 atomic_set(&neigh
->refcnt
, 1);
944 struct ipoib_neigh
*ipoib_neigh_alloc(u8
*daddr
,
945 struct net_device
*dev
)
947 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
948 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
949 struct ipoib_neigh_hash
*htbl
;
950 struct ipoib_neigh
*neigh
;
953 htbl
= rcu_dereference_protected(ntbl
->htbl
,
954 lockdep_is_held(&priv
->lock
));
960 /* need to add a new neigh, but maybe some other thread succeeded?
961 * recalc hash, maybe hash resize took place so we do a search
963 hash_val
= ipoib_addr_hash(htbl
, daddr
);
964 for (neigh
= rcu_dereference_protected(htbl
->buckets
[hash_val
],
965 lockdep_is_held(&priv
->lock
));
967 neigh
= rcu_dereference_protected(neigh
->hnext
,
968 lockdep_is_held(&priv
->lock
))) {
969 if (memcmp(daddr
, neigh
->daddr
, INFINIBAND_ALEN
) == 0) {
970 /* found, take one ref on behalf of the caller */
971 if (!atomic_inc_not_zero(&neigh
->refcnt
)) {
976 neigh
->alive
= jiffies
;
981 neigh
= ipoib_neigh_ctor(daddr
, dev
);
985 /* one ref on behalf of the hash table */
986 atomic_inc(&neigh
->refcnt
);
987 neigh
->alive
= jiffies
;
989 rcu_assign_pointer(neigh
->hnext
,
990 rcu_dereference_protected(htbl
->buckets
[hash_val
],
991 lockdep_is_held(&priv
->lock
)));
992 rcu_assign_pointer(htbl
->buckets
[hash_val
], neigh
);
993 atomic_inc(&ntbl
->entries
);
1000 void ipoib_neigh_dtor(struct ipoib_neigh
*neigh
)
1002 /* neigh reference count was dropprd to zero */
1003 struct net_device
*dev
= neigh
->dev
;
1004 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1005 struct sk_buff
*skb
;
1007 ipoib_put_ah(neigh
->ah
);
1008 while ((skb
= __skb_dequeue(&neigh
->queue
))) {
1009 ++dev
->stats
.tx_dropped
;
1010 dev_kfree_skb_any(skb
);
1012 if (ipoib_cm_get(neigh
))
1013 ipoib_cm_destroy_tx(ipoib_cm_get(neigh
));
1014 ipoib_dbg(netdev_priv(dev
),
1015 "neigh free for %06x %pI6\n",
1016 IPOIB_QPN(neigh
->daddr
),
1019 if (atomic_dec_and_test(&priv
->ntbl
.entries
)) {
1020 if (test_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
))
1021 complete(&priv
->ntbl
.flushed
);
1025 static void ipoib_neigh_reclaim(struct rcu_head
*rp
)
1027 /* Called as a result of removal from hash table */
1028 struct ipoib_neigh
*neigh
= container_of(rp
, struct ipoib_neigh
, rcu
);
1029 /* note TX context may hold another ref */
1030 ipoib_neigh_put(neigh
);
1033 void ipoib_neigh_free(struct ipoib_neigh
*neigh
)
1035 struct net_device
*dev
= neigh
->dev
;
1036 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1037 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1038 struct ipoib_neigh_hash
*htbl
;
1039 struct ipoib_neigh __rcu
**np
;
1040 struct ipoib_neigh
*n
;
1043 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1044 lockdep_is_held(&priv
->lock
));
1048 hash_val
= ipoib_addr_hash(htbl
, neigh
->daddr
);
1049 np
= &htbl
->buckets
[hash_val
];
1050 for (n
= rcu_dereference_protected(*np
,
1051 lockdep_is_held(&priv
->lock
));
1053 n
= rcu_dereference_protected(*np
,
1054 lockdep_is_held(&priv
->lock
))) {
1057 rcu_assign_pointer(*np
,
1058 rcu_dereference_protected(neigh
->hnext
,
1059 lockdep_is_held(&priv
->lock
)));
1060 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1068 static int ipoib_neigh_hash_init(struct ipoib_dev_priv
*priv
)
1070 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1071 struct ipoib_neigh_hash
*htbl
;
1072 struct ipoib_neigh
**buckets
;
1075 clear_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1077 htbl
= kzalloc(sizeof(*htbl
), GFP_KERNEL
);
1080 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1081 size
= roundup_pow_of_two(arp_tbl
.gc_thresh3
);
1082 buckets
= kzalloc(size
* sizeof(*buckets
), GFP_KERNEL
);
1088 htbl
->mask
= (size
- 1);
1089 htbl
->buckets
= buckets
;
1092 atomic_set(&ntbl
->entries
, 0);
1094 /* start garbage collection */
1095 clear_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1096 queue_delayed_work(ipoib_workqueue
, &priv
->neigh_reap_task
,
1097 arp_tbl
.gc_interval
);
1102 static void neigh_hash_free_rcu(struct rcu_head
*head
)
1104 struct ipoib_neigh_hash
*htbl
= container_of(head
,
1105 struct ipoib_neigh_hash
,
1107 struct ipoib_neigh __rcu
**buckets
= htbl
->buckets
;
1108 struct ipoib_neigh_table
*ntbl
= htbl
->ntbl
;
1112 complete(&ntbl
->deleted
);
1115 void ipoib_del_neighs_by_gid(struct net_device
*dev
, u8
*gid
)
1117 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1118 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1119 struct ipoib_neigh_hash
*htbl
;
1120 unsigned long flags
;
1123 /* remove all neigh connected to a given path or mcast */
1124 spin_lock_irqsave(&priv
->lock
, flags
);
1126 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1127 lockdep_is_held(&priv
->lock
));
1132 for (i
= 0; i
< htbl
->size
; i
++) {
1133 struct ipoib_neigh
*neigh
;
1134 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
1136 while ((neigh
= rcu_dereference_protected(*np
,
1137 lockdep_is_held(&priv
->lock
))) != NULL
) {
1138 /* delete neighs belong to this parent */
1139 if (!memcmp(gid
, neigh
->daddr
+ 4, sizeof (union ib_gid
))) {
1140 rcu_assign_pointer(*np
,
1141 rcu_dereference_protected(neigh
->hnext
,
1142 lockdep_is_held(&priv
->lock
)));
1143 /* remove from parent list */
1144 list_del(&neigh
->list
);
1145 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1153 spin_unlock_irqrestore(&priv
->lock
, flags
);
1156 static void ipoib_flush_neighs(struct ipoib_dev_priv
*priv
)
1158 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1159 struct ipoib_neigh_hash
*htbl
;
1160 unsigned long flags
;
1161 int i
, wait_flushed
= 0;
1163 init_completion(&priv
->ntbl
.flushed
);
1165 spin_lock_irqsave(&priv
->lock
, flags
);
1167 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1168 lockdep_is_held(&priv
->lock
));
1172 wait_flushed
= atomic_read(&priv
->ntbl
.entries
);
1176 for (i
= 0; i
< htbl
->size
; i
++) {
1177 struct ipoib_neigh
*neigh
;
1178 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
1180 while ((neigh
= rcu_dereference_protected(*np
,
1181 lockdep_is_held(&priv
->lock
))) != NULL
) {
1182 rcu_assign_pointer(*np
,
1183 rcu_dereference_protected(neigh
->hnext
,
1184 lockdep_is_held(&priv
->lock
)));
1185 /* remove from path/mc list */
1186 list_del(&neigh
->list
);
1187 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1192 rcu_assign_pointer(ntbl
->htbl
, NULL
);
1193 call_rcu(&htbl
->rcu
, neigh_hash_free_rcu
);
1196 spin_unlock_irqrestore(&priv
->lock
, flags
);
1198 wait_for_completion(&priv
->ntbl
.flushed
);
1201 static void ipoib_neigh_hash_uninit(struct net_device
*dev
)
1203 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1206 ipoib_dbg(priv
, "ipoib_neigh_hash_uninit\n");
1207 init_completion(&priv
->ntbl
.deleted
);
1208 set_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1210 /* Stop GC if called at init fail need to cancel work */
1211 stopped
= test_and_set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1213 cancel_delayed_work(&priv
->neigh_reap_task
);
1215 ipoib_flush_neighs(priv
);
1217 wait_for_completion(&priv
->ntbl
.deleted
);
1221 int ipoib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
1223 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1225 if (ipoib_neigh_hash_init(priv
) < 0)
1227 /* Allocate RX/TX "rings" to hold queued skbs */
1228 priv
->rx_ring
= kzalloc(ipoib_recvq_size
* sizeof *priv
->rx_ring
,
1230 if (!priv
->rx_ring
) {
1231 printk(KERN_WARNING
"%s: failed to allocate RX ring (%d entries)\n",
1232 ca
->name
, ipoib_recvq_size
);
1233 goto out_neigh_hash_cleanup
;
1236 priv
->tx_ring
= vzalloc(ipoib_sendq_size
* sizeof *priv
->tx_ring
);
1237 if (!priv
->tx_ring
) {
1238 printk(KERN_WARNING
"%s: failed to allocate TX ring (%d entries)\n",
1239 ca
->name
, ipoib_sendq_size
);
1240 goto out_rx_ring_cleanup
;
1243 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
1245 if (ipoib_ib_dev_init(dev
, ca
, port
))
1246 goto out_tx_ring_cleanup
;
1250 out_tx_ring_cleanup
:
1251 vfree(priv
->tx_ring
);
1253 out_rx_ring_cleanup
:
1254 kfree(priv
->rx_ring
);
1256 out_neigh_hash_cleanup
:
1257 ipoib_neigh_hash_uninit(dev
);
1262 void ipoib_dev_cleanup(struct net_device
*dev
)
1264 struct ipoib_dev_priv
*priv
= netdev_priv(dev
), *cpriv
, *tcpriv
;
1269 ipoib_delete_debug_files(dev
);
1271 /* Delete any child interfaces first */
1272 list_for_each_entry_safe(cpriv
, tcpriv
, &priv
->child_intfs
, list
) {
1273 /* Stop GC on child */
1274 set_bit(IPOIB_STOP_NEIGH_GC
, &cpriv
->flags
);
1275 cancel_delayed_work(&cpriv
->neigh_reap_task
);
1276 unregister_netdevice_queue(cpriv
->dev
, &head
);
1278 unregister_netdevice_many(&head
);
1280 ipoib_ib_dev_cleanup(dev
);
1282 kfree(priv
->rx_ring
);
1283 vfree(priv
->tx_ring
);
1285 priv
->rx_ring
= NULL
;
1286 priv
->tx_ring
= NULL
;
1288 ipoib_neigh_hash_uninit(dev
);
1291 static const struct header_ops ipoib_header_ops
= {
1292 .create
= ipoib_hard_header
,
1295 static const struct net_device_ops ipoib_netdev_ops
= {
1296 .ndo_uninit
= ipoib_uninit
,
1297 .ndo_open
= ipoib_open
,
1298 .ndo_stop
= ipoib_stop
,
1299 .ndo_change_mtu
= ipoib_change_mtu
,
1300 .ndo_fix_features
= ipoib_fix_features
,
1301 .ndo_start_xmit
= ipoib_start_xmit
,
1302 .ndo_tx_timeout
= ipoib_timeout
,
1303 .ndo_set_rx_mode
= ipoib_set_mcast_list
,
1306 void ipoib_setup(struct net_device
*dev
)
1308 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1310 dev
->netdev_ops
= &ipoib_netdev_ops
;
1311 dev
->header_ops
= &ipoib_header_ops
;
1313 ipoib_set_ethtool_ops(dev
);
1315 netif_napi_add(dev
, &priv
->napi
, ipoib_poll
, 100);
1317 dev
->watchdog_timeo
= HZ
;
1319 dev
->flags
|= IFF_BROADCAST
| IFF_MULTICAST
;
1321 dev
->hard_header_len
= IPOIB_ENCAP_LEN
;
1322 dev
->addr_len
= INFINIBAND_ALEN
;
1323 dev
->type
= ARPHRD_INFINIBAND
;
1324 dev
->tx_queue_len
= ipoib_sendq_size
* 2;
1325 dev
->features
= (NETIF_F_VLAN_CHALLENGED
|
1327 dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
1329 memcpy(dev
->broadcast
, ipv4_bcast_addr
, INFINIBAND_ALEN
);
1331 netif_carrier_off(dev
);
1335 spin_lock_init(&priv
->lock
);
1337 mutex_init(&priv
->vlan_mutex
);
1339 INIT_LIST_HEAD(&priv
->path_list
);
1340 INIT_LIST_HEAD(&priv
->child_intfs
);
1341 INIT_LIST_HEAD(&priv
->dead_ahs
);
1342 INIT_LIST_HEAD(&priv
->multicast_list
);
1344 INIT_DELAYED_WORK(&priv
->pkey_poll_task
, ipoib_pkey_poll
);
1345 INIT_DELAYED_WORK(&priv
->mcast_task
, ipoib_mcast_join_task
);
1346 INIT_WORK(&priv
->carrier_on_task
, ipoib_mcast_carrier_on_task
);
1347 INIT_WORK(&priv
->flush_light
, ipoib_ib_dev_flush_light
);
1348 INIT_WORK(&priv
->flush_normal
, ipoib_ib_dev_flush_normal
);
1349 INIT_WORK(&priv
->flush_heavy
, ipoib_ib_dev_flush_heavy
);
1350 INIT_WORK(&priv
->restart_task
, ipoib_mcast_restart_task
);
1351 INIT_DELAYED_WORK(&priv
->ah_reap_task
, ipoib_reap_ah
);
1352 INIT_DELAYED_WORK(&priv
->neigh_reap_task
, ipoib_reap_neigh
);
1355 struct ipoib_dev_priv
*ipoib_intf_alloc(const char *name
)
1357 struct net_device
*dev
;
1359 dev
= alloc_netdev((int) sizeof (struct ipoib_dev_priv
), name
,
1364 return netdev_priv(dev
);
1367 static ssize_t
show_pkey(struct device
*dev
,
1368 struct device_attribute
*attr
, char *buf
)
1370 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1372 return sprintf(buf
, "0x%04x\n", priv
->pkey
);
1374 static DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
1376 static ssize_t
show_umcast(struct device
*dev
,
1377 struct device_attribute
*attr
, char *buf
)
1379 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1381 return sprintf(buf
, "%d\n", test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
));
1384 void ipoib_set_umcast(struct net_device
*ndev
, int umcast_val
)
1386 struct ipoib_dev_priv
*priv
= netdev_priv(ndev
);
1388 if (umcast_val
> 0) {
1389 set_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
);
1390 ipoib_warn(priv
, "ignoring multicast groups joined directly "
1393 clear_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
);
1396 static ssize_t
set_umcast(struct device
*dev
,
1397 struct device_attribute
*attr
,
1398 const char *buf
, size_t count
)
1400 unsigned long umcast_val
= simple_strtoul(buf
, NULL
, 0);
1402 ipoib_set_umcast(to_net_dev(dev
), umcast_val
);
1406 static DEVICE_ATTR(umcast
, S_IWUSR
| S_IRUGO
, show_umcast
, set_umcast
);
1408 int ipoib_add_umcast_attr(struct net_device
*dev
)
1410 return device_create_file(&dev
->dev
, &dev_attr_umcast
);
1413 static ssize_t
create_child(struct device
*dev
,
1414 struct device_attribute
*attr
,
1415 const char *buf
, size_t count
)
1420 if (sscanf(buf
, "%i", &pkey
) != 1)
1423 if (pkey
< 0 || pkey
> 0xffff)
1427 * Set the full membership bit, so that we join the right
1428 * broadcast group, etc.
1432 ret
= ipoib_vlan_add(to_net_dev(dev
), pkey
);
1434 return ret
? ret
: count
;
1436 static DEVICE_ATTR(create_child
, S_IWUSR
, NULL
, create_child
);
1438 static ssize_t
delete_child(struct device
*dev
,
1439 struct device_attribute
*attr
,
1440 const char *buf
, size_t count
)
1445 if (sscanf(buf
, "%i", &pkey
) != 1)
1448 if (pkey
< 0 || pkey
> 0xffff)
1451 ret
= ipoib_vlan_delete(to_net_dev(dev
), pkey
);
1453 return ret
? ret
: count
;
1456 static DEVICE_ATTR(delete_child
, S_IWUSR
, NULL
, delete_child
);
1458 int ipoib_add_pkey_attr(struct net_device
*dev
)
1460 return device_create_file(&dev
->dev
, &dev_attr_pkey
);
1463 int ipoib_set_dev_features(struct ipoib_dev_priv
*priv
, struct ib_device
*hca
)
1465 struct ib_device_attr
*device_attr
;
1466 int result
= -ENOMEM
;
1468 device_attr
= kmalloc(sizeof *device_attr
, GFP_KERNEL
);
1470 printk(KERN_WARNING
"%s: allocation of %zu bytes failed\n",
1471 hca
->name
, sizeof *device_attr
);
1475 result
= ib_query_device(hca
, device_attr
);
1477 printk(KERN_WARNING
"%s: ib_query_device failed (ret = %d)\n",
1482 priv
->hca_caps
= device_attr
->device_cap_flags
;
1486 if (priv
->hca_caps
& IB_DEVICE_UD_IP_CSUM
) {
1487 priv
->dev
->hw_features
= NETIF_F_SG
|
1488 NETIF_F_IP_CSUM
| NETIF_F_RXCSUM
;
1490 if (priv
->hca_caps
& IB_DEVICE_UD_TSO
)
1491 priv
->dev
->hw_features
|= NETIF_F_TSO
;
1493 priv
->dev
->features
|= priv
->dev
->hw_features
;
1499 static struct net_device
*ipoib_add_port(const char *format
,
1500 struct ib_device
*hca
, u8 port
)
1502 struct ipoib_dev_priv
*priv
;
1503 struct ib_port_attr attr
;
1504 int result
= -ENOMEM
;
1506 priv
= ipoib_intf_alloc(format
);
1508 goto alloc_mem_failed
;
1510 SET_NETDEV_DEV(priv
->dev
, hca
->dma_device
);
1511 priv
->dev
->dev_id
= port
- 1;
1513 if (!ib_query_port(hca
, port
, &attr
))
1514 priv
->max_ib_mtu
= ib_mtu_enum_to_int(attr
.max_mtu
);
1516 printk(KERN_WARNING
"%s: ib_query_port %d failed\n",
1518 goto device_init_failed
;
1521 /* MTU will be reset when mcast join happens */
1522 priv
->dev
->mtu
= IPOIB_UD_MTU(priv
->max_ib_mtu
);
1523 priv
->mcast_mtu
= priv
->admin_mtu
= priv
->dev
->mtu
;
1525 priv
->dev
->neigh_priv_len
= sizeof(struct ipoib_neigh
);
1527 result
= ib_query_pkey(hca
, port
, 0, &priv
->pkey
);
1529 printk(KERN_WARNING
"%s: ib_query_pkey port %d failed (ret = %d)\n",
1530 hca
->name
, port
, result
);
1531 goto device_init_failed
;
1534 if (ipoib_set_dev_features(priv
, hca
))
1535 goto device_init_failed
;
1538 * Set the full membership bit, so that we join the right
1539 * broadcast group, etc.
1541 priv
->pkey
|= 0x8000;
1543 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
1544 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
1546 result
= ib_query_gid(hca
, port
, 0, &priv
->local_gid
);
1548 printk(KERN_WARNING
"%s: ib_query_gid port %d failed (ret = %d)\n",
1549 hca
->name
, port
, result
);
1550 goto device_init_failed
;
1552 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
1554 result
= ipoib_dev_init(priv
->dev
, hca
, port
);
1556 printk(KERN_WARNING
"%s: failed to initialize port %d (ret = %d)\n",
1557 hca
->name
, port
, result
);
1558 goto device_init_failed
;
1561 INIT_IB_EVENT_HANDLER(&priv
->event_handler
,
1562 priv
->ca
, ipoib_event
);
1563 result
= ib_register_event_handler(&priv
->event_handler
);
1565 printk(KERN_WARNING
"%s: ib_register_event_handler failed for "
1566 "port %d (ret = %d)\n",
1567 hca
->name
, port
, result
);
1571 result
= register_netdev(priv
->dev
);
1573 printk(KERN_WARNING
"%s: couldn't register ipoib port %d; error %d\n",
1574 hca
->name
, port
, result
);
1575 goto register_failed
;
1578 ipoib_create_debug_files(priv
->dev
);
1580 if (ipoib_cm_add_mode_attr(priv
->dev
))
1582 if (ipoib_add_pkey_attr(priv
->dev
))
1584 if (ipoib_add_umcast_attr(priv
->dev
))
1586 if (device_create_file(&priv
->dev
->dev
, &dev_attr_create_child
))
1588 if (device_create_file(&priv
->dev
->dev
, &dev_attr_delete_child
))
1594 ipoib_delete_debug_files(priv
->dev
);
1595 unregister_netdev(priv
->dev
);
1598 ib_unregister_event_handler(&priv
->event_handler
);
1599 /* Stop GC if started before flush */
1600 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1601 cancel_delayed_work(&priv
->neigh_reap_task
);
1602 flush_workqueue(ipoib_workqueue
);
1605 ipoib_dev_cleanup(priv
->dev
);
1608 free_netdev(priv
->dev
);
1611 return ERR_PTR(result
);
1614 static void ipoib_add_one(struct ib_device
*device
)
1616 struct list_head
*dev_list
;
1617 struct net_device
*dev
;
1618 struct ipoib_dev_priv
*priv
;
1621 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1624 dev_list
= kmalloc(sizeof *dev_list
, GFP_KERNEL
);
1628 INIT_LIST_HEAD(dev_list
);
1630 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
1635 e
= device
->phys_port_cnt
;
1638 for (p
= s
; p
<= e
; ++p
) {
1639 if (rdma_port_get_link_layer(device
, p
) != IB_LINK_LAYER_INFINIBAND
)
1641 dev
= ipoib_add_port("ib%d", device
, p
);
1643 priv
= netdev_priv(dev
);
1644 list_add_tail(&priv
->list
, dev_list
);
1648 ib_set_client_data(device
, &ipoib_client
, dev_list
);
1651 static void ipoib_remove_one(struct ib_device
*device
)
1653 struct ipoib_dev_priv
*priv
, *tmp
;
1654 struct list_head
*dev_list
;
1656 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1659 dev_list
= ib_get_client_data(device
, &ipoib_client
);
1661 list_for_each_entry_safe(priv
, tmp
, dev_list
, list
) {
1662 ib_unregister_event_handler(&priv
->event_handler
);
1665 dev_change_flags(priv
->dev
, priv
->dev
->flags
& ~IFF_UP
);
1669 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1670 cancel_delayed_work(&priv
->neigh_reap_task
);
1671 flush_workqueue(ipoib_workqueue
);
1673 unregister_netdev(priv
->dev
);
1674 free_netdev(priv
->dev
);
1680 static int __init
ipoib_init_module(void)
1684 ipoib_recvq_size
= roundup_pow_of_two(ipoib_recvq_size
);
1685 ipoib_recvq_size
= min(ipoib_recvq_size
, IPOIB_MAX_QUEUE_SIZE
);
1686 ipoib_recvq_size
= max(ipoib_recvq_size
, IPOIB_MIN_QUEUE_SIZE
);
1688 ipoib_sendq_size
= roundup_pow_of_two(ipoib_sendq_size
);
1689 ipoib_sendq_size
= min(ipoib_sendq_size
, IPOIB_MAX_QUEUE_SIZE
);
1690 ipoib_sendq_size
= max3(ipoib_sendq_size
, 2 * MAX_SEND_CQE
, IPOIB_MIN_QUEUE_SIZE
);
1691 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1692 ipoib_max_conn_qp
= min(ipoib_max_conn_qp
, IPOIB_CM_MAX_CONN_QP
);
1696 * When copying small received packets, we only copy from the
1697 * linear data part of the SKB, so we rely on this condition.
1699 BUILD_BUG_ON(IPOIB_CM_COPYBREAK
> IPOIB_CM_HEAD_SIZE
);
1701 ret
= ipoib_register_debugfs();
1706 * We create our own workqueue mainly because we want to be
1707 * able to flush it when devices are being removed. We can't
1708 * use schedule_work()/flush_scheduled_work() because both
1709 * unregister_netdev() and linkwatch_event take the rtnl lock,
1710 * so flush_scheduled_work() can deadlock during device
1713 ipoib_workqueue
= create_singlethread_workqueue("ipoib");
1714 if (!ipoib_workqueue
) {
1719 ib_sa_register_client(&ipoib_sa_client
);
1721 ret
= ib_register_client(&ipoib_client
);
1725 ret
= ipoib_netlink_init();
1732 ib_unregister_client(&ipoib_client
);
1735 ib_sa_unregister_client(&ipoib_sa_client
);
1736 destroy_workqueue(ipoib_workqueue
);
1739 ipoib_unregister_debugfs();
1744 static void __exit
ipoib_cleanup_module(void)
1746 ipoib_netlink_fini();
1747 ib_unregister_client(&ipoib_client
);
1748 ib_sa_unregister_client(&ipoib_sa_client
);
1749 ipoib_unregister_debugfs();
1750 destroy_workqueue(ipoib_workqueue
);
1753 module_init(ipoib_init_module
);
1754 module_exit(ipoib_cleanup_module
);