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 #define DRV_VERSION "1.0.0"
54 const char ipoib_driver_version
[] = DRV_VERSION
;
56 MODULE_AUTHOR("Roland Dreier");
57 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
58 MODULE_LICENSE("Dual BSD/GPL");
59 MODULE_VERSION(DRV_VERSION
);
61 int ipoib_sendq_size __read_mostly
= IPOIB_TX_RING_SIZE
;
62 int ipoib_recvq_size __read_mostly
= IPOIB_RX_RING_SIZE
;
64 module_param_named(send_queue_size
, ipoib_sendq_size
, int, 0444);
65 MODULE_PARM_DESC(send_queue_size
, "Number of descriptors in send queue");
66 module_param_named(recv_queue_size
, ipoib_recvq_size
, int, 0444);
67 MODULE_PARM_DESC(recv_queue_size
, "Number of descriptors in receive queue");
69 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
70 int ipoib_debug_level
;
72 module_param_named(debug_level
, ipoib_debug_level
, int, 0644);
73 MODULE_PARM_DESC(debug_level
, "Enable debug tracing if > 0");
76 struct ipoib_path_iter
{
77 struct net_device
*dev
;
78 struct ipoib_path path
;
81 static const u8 ipv4_bcast_addr
[] = {
82 0x00, 0xff, 0xff, 0xff,
83 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
87 struct workqueue_struct
*ipoib_workqueue
;
89 struct ib_sa_client ipoib_sa_client
;
91 static void ipoib_add_one(struct ib_device
*device
);
92 static void ipoib_remove_one(struct ib_device
*device
);
93 static void ipoib_neigh_reclaim(struct rcu_head
*rp
);
95 static struct ib_client ipoib_client
= {
98 .remove
= ipoib_remove_one
101 int ipoib_open(struct net_device
*dev
)
103 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
105 ipoib_dbg(priv
, "bringing up interface\n");
107 netif_carrier_off(dev
);
109 set_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
111 if (ipoib_ib_dev_open(dev
)) {
112 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
))
117 if (ipoib_ib_dev_up(dev
))
120 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
121 struct ipoib_dev_priv
*cpriv
;
123 /* Bring up any child interfaces too */
124 down_read(&priv
->vlan_rwsem
);
125 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
128 flags
= cpriv
->dev
->flags
;
132 dev_change_flags(cpriv
->dev
, flags
| IFF_UP
);
134 up_read(&priv
->vlan_rwsem
);
137 netif_start_queue(dev
);
142 ipoib_ib_dev_stop(dev
);
145 clear_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
150 static int ipoib_stop(struct net_device
*dev
)
152 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
154 ipoib_dbg(priv
, "stopping interface\n");
156 clear_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
);
158 netif_stop_queue(dev
);
160 ipoib_ib_dev_down(dev
);
161 ipoib_ib_dev_stop(dev
);
163 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
164 struct ipoib_dev_priv
*cpriv
;
166 /* Bring down any child interfaces too */
167 down_read(&priv
->vlan_rwsem
);
168 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
) {
171 flags
= cpriv
->dev
->flags
;
172 if (!(flags
& IFF_UP
))
175 dev_change_flags(cpriv
->dev
, flags
& ~IFF_UP
);
177 up_read(&priv
->vlan_rwsem
);
183 static void ipoib_uninit(struct net_device
*dev
)
185 ipoib_dev_cleanup(dev
);
188 static netdev_features_t
ipoib_fix_features(struct net_device
*dev
, netdev_features_t features
)
190 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
192 if (test_bit(IPOIB_FLAG_ADMIN_CM
, &priv
->flags
))
193 features
&= ~(NETIF_F_SG
| NETIF_F_IP_CSUM
| NETIF_F_TSO
);
198 static int ipoib_change_mtu(struct net_device
*dev
, int new_mtu
)
200 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
202 /* dev->mtu > 2K ==> connected mode */
203 if (ipoib_cm_admin_enabled(dev
)) {
204 if (new_mtu
> ipoib_cm_max_mtu(dev
))
207 if (new_mtu
> priv
->mcast_mtu
)
208 ipoib_warn(priv
, "mtu > %d will cause multicast packet drops.\n",
215 if (new_mtu
> IPOIB_UD_MTU(priv
->max_ib_mtu
))
218 priv
->admin_mtu
= new_mtu
;
220 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
225 int ipoib_set_mode(struct net_device
*dev
, const char *buf
)
227 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
229 /* flush paths if we switch modes so that connections are restarted */
230 if (IPOIB_CM_SUPPORTED(dev
->dev_addr
) && !strcmp(buf
, "connected\n")) {
231 set_bit(IPOIB_FLAG_ADMIN_CM
, &priv
->flags
);
232 ipoib_warn(priv
, "enabling connected mode "
233 "will cause multicast packet drops\n");
234 netdev_update_features(dev
);
236 priv
->tx_wr
.send_flags
&= ~IB_SEND_IP_CSUM
;
238 ipoib_flush_paths(dev
);
243 if (!strcmp(buf
, "datagram\n")) {
244 clear_bit(IPOIB_FLAG_ADMIN_CM
, &priv
->flags
);
245 netdev_update_features(dev
);
246 dev_set_mtu(dev
, min(priv
->mcast_mtu
, dev
->mtu
));
248 ipoib_flush_paths(dev
);
256 static struct ipoib_path
*__path_find(struct net_device
*dev
, void *gid
)
258 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
259 struct rb_node
*n
= priv
->path_tree
.rb_node
;
260 struct ipoib_path
*path
;
264 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
266 ret
= memcmp(gid
, path
->pathrec
.dgid
.raw
,
267 sizeof (union ib_gid
));
280 static int __path_add(struct net_device
*dev
, struct ipoib_path
*path
)
282 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
283 struct rb_node
**n
= &priv
->path_tree
.rb_node
;
284 struct rb_node
*pn
= NULL
;
285 struct ipoib_path
*tpath
;
290 tpath
= rb_entry(pn
, struct ipoib_path
, rb_node
);
292 ret
= memcmp(path
->pathrec
.dgid
.raw
, tpath
->pathrec
.dgid
.raw
,
293 sizeof (union ib_gid
));
302 rb_link_node(&path
->rb_node
, pn
, n
);
303 rb_insert_color(&path
->rb_node
, &priv
->path_tree
);
305 list_add_tail(&path
->list
, &priv
->path_list
);
310 static void path_free(struct net_device
*dev
, struct ipoib_path
*path
)
314 while ((skb
= __skb_dequeue(&path
->queue
)))
315 dev_kfree_skb_irq(skb
);
317 ipoib_dbg(netdev_priv(dev
), "path_free\n");
319 /* remove all neigh connected to this path */
320 ipoib_del_neighs_by_gid(dev
, path
->pathrec
.dgid
.raw
);
323 ipoib_put_ah(path
->ah
);
328 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
330 struct ipoib_path_iter
*ipoib_path_iter_init(struct net_device
*dev
)
332 struct ipoib_path_iter
*iter
;
334 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
339 memset(iter
->path
.pathrec
.dgid
.raw
, 0, 16);
341 if (ipoib_path_iter_next(iter
)) {
349 int ipoib_path_iter_next(struct ipoib_path_iter
*iter
)
351 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
353 struct ipoib_path
*path
;
356 spin_lock_irq(&priv
->lock
);
358 n
= rb_first(&priv
->path_tree
);
361 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
363 if (memcmp(iter
->path
.pathrec
.dgid
.raw
, path
->pathrec
.dgid
.raw
,
364 sizeof (union ib_gid
)) < 0) {
373 spin_unlock_irq(&priv
->lock
);
378 void ipoib_path_iter_read(struct ipoib_path_iter
*iter
,
379 struct ipoib_path
*path
)
384 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
386 void ipoib_mark_paths_invalid(struct net_device
*dev
)
388 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
389 struct ipoib_path
*path
, *tp
;
391 spin_lock_irq(&priv
->lock
);
393 list_for_each_entry_safe(path
, tp
, &priv
->path_list
, list
) {
394 ipoib_dbg(priv
, "mark path LID 0x%04x GID %pI6 invalid\n",
395 be16_to_cpu(path
->pathrec
.dlid
),
396 path
->pathrec
.dgid
.raw
);
400 spin_unlock_irq(&priv
->lock
);
403 void ipoib_flush_paths(struct net_device
*dev
)
405 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
406 struct ipoib_path
*path
, *tp
;
407 LIST_HEAD(remove_list
);
410 netif_tx_lock_bh(dev
);
411 spin_lock_irqsave(&priv
->lock
, flags
);
413 list_splice_init(&priv
->path_list
, &remove_list
);
415 list_for_each_entry(path
, &remove_list
, list
)
416 rb_erase(&path
->rb_node
, &priv
->path_tree
);
418 list_for_each_entry_safe(path
, tp
, &remove_list
, list
) {
420 ib_sa_cancel_query(path
->query_id
, path
->query
);
421 spin_unlock_irqrestore(&priv
->lock
, flags
);
422 netif_tx_unlock_bh(dev
);
423 wait_for_completion(&path
->done
);
424 path_free(dev
, path
);
425 netif_tx_lock_bh(dev
);
426 spin_lock_irqsave(&priv
->lock
, flags
);
429 spin_unlock_irqrestore(&priv
->lock
, flags
);
430 netif_tx_unlock_bh(dev
);
433 static void path_rec_completion(int status
,
434 struct ib_sa_path_rec
*pathrec
,
437 struct ipoib_path
*path
= path_ptr
;
438 struct net_device
*dev
= path
->dev
;
439 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
440 struct ipoib_ah
*ah
= NULL
;
441 struct ipoib_ah
*old_ah
= NULL
;
442 struct ipoib_neigh
*neigh
, *tn
;
443 struct sk_buff_head skqueue
;
448 ipoib_dbg(priv
, "PathRec LID 0x%04x for GID %pI6\n",
449 be16_to_cpu(pathrec
->dlid
), pathrec
->dgid
.raw
);
451 ipoib_dbg(priv
, "PathRec status %d for GID %pI6\n",
452 status
, path
->pathrec
.dgid
.raw
);
454 skb_queue_head_init(&skqueue
);
457 struct ib_ah_attr av
;
459 if (!ib_init_ah_from_path(priv
->ca
, priv
->port
, pathrec
, &av
))
460 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
463 spin_lock_irqsave(&priv
->lock
, flags
);
465 if (!IS_ERR_OR_NULL(ah
)) {
466 path
->pathrec
= *pathrec
;
471 ipoib_dbg(priv
, "created address handle %p for LID 0x%04x, SL %d\n",
472 ah
, be16_to_cpu(pathrec
->dlid
), pathrec
->sl
);
474 while ((skb
= __skb_dequeue(&path
->queue
)))
475 __skb_queue_tail(&skqueue
, skb
);
477 list_for_each_entry_safe(neigh
, tn
, &path
->neigh_list
, list
) {
479 WARN_ON(neigh
->ah
!= old_ah
);
481 * Dropping the ah reference inside
482 * priv->lock is safe here, because we
483 * will hold one more reference from
484 * the original value of path->ah (ie
487 ipoib_put_ah(neigh
->ah
);
489 kref_get(&path
->ah
->ref
);
490 neigh
->ah
= path
->ah
;
492 if (ipoib_cm_enabled(dev
, neigh
->daddr
)) {
493 if (!ipoib_cm_get(neigh
))
494 ipoib_cm_set(neigh
, ipoib_cm_create_tx(dev
,
497 if (!ipoib_cm_get(neigh
)) {
498 ipoib_neigh_free(neigh
);
503 while ((skb
= __skb_dequeue(&neigh
->queue
)))
504 __skb_queue_tail(&skqueue
, skb
);
510 complete(&path
->done
);
512 spin_unlock_irqrestore(&priv
->lock
, flags
);
514 if (IS_ERR_OR_NULL(ah
))
515 ipoib_del_neighs_by_gid(dev
, path
->pathrec
.dgid
.raw
);
518 ipoib_put_ah(old_ah
);
520 while ((skb
= __skb_dequeue(&skqueue
))) {
522 if (dev_queue_xmit(skb
))
523 ipoib_warn(priv
, "dev_queue_xmit failed "
524 "to requeue packet\n");
528 static struct ipoib_path
*path_rec_create(struct net_device
*dev
, void *gid
)
530 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
531 struct ipoib_path
*path
;
533 if (!priv
->broadcast
)
536 path
= kzalloc(sizeof *path
, GFP_ATOMIC
);
542 skb_queue_head_init(&path
->queue
);
544 INIT_LIST_HEAD(&path
->neigh_list
);
546 memcpy(path
->pathrec
.dgid
.raw
, gid
, sizeof (union ib_gid
));
547 path
->pathrec
.sgid
= priv
->local_gid
;
548 path
->pathrec
.pkey
= cpu_to_be16(priv
->pkey
);
549 path
->pathrec
.numb_path
= 1;
550 path
->pathrec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
555 static int path_rec_start(struct net_device
*dev
,
556 struct ipoib_path
*path
)
558 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
560 ipoib_dbg(priv
, "Start path record lookup for %pI6\n",
561 path
->pathrec
.dgid
.raw
);
563 init_completion(&path
->done
);
566 ib_sa_path_rec_get(&ipoib_sa_client
, priv
->ca
, priv
->port
,
568 IB_SA_PATH_REC_DGID
|
569 IB_SA_PATH_REC_SGID
|
570 IB_SA_PATH_REC_NUMB_PATH
|
571 IB_SA_PATH_REC_TRAFFIC_CLASS
|
576 if (path
->query_id
< 0) {
577 ipoib_warn(priv
, "ib_sa_path_rec_get failed: %d\n", path
->query_id
);
579 complete(&path
->done
);
580 return path
->query_id
;
586 static void neigh_add_path(struct sk_buff
*skb
, u8
*daddr
,
587 struct net_device
*dev
)
589 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
590 struct ipoib_path
*path
;
591 struct ipoib_neigh
*neigh
;
594 spin_lock_irqsave(&priv
->lock
, flags
);
595 neigh
= ipoib_neigh_alloc(daddr
, dev
);
597 spin_unlock_irqrestore(&priv
->lock
, flags
);
598 ++dev
->stats
.tx_dropped
;
599 dev_kfree_skb_any(skb
);
603 path
= __path_find(dev
, daddr
+ 4);
605 path
= path_rec_create(dev
, daddr
+ 4);
609 __path_add(dev
, path
);
612 list_add_tail(&neigh
->list
, &path
->neigh_list
);
615 kref_get(&path
->ah
->ref
);
616 neigh
->ah
= path
->ah
;
618 if (ipoib_cm_enabled(dev
, neigh
->daddr
)) {
619 if (!ipoib_cm_get(neigh
))
620 ipoib_cm_set(neigh
, ipoib_cm_create_tx(dev
, path
, neigh
));
621 if (!ipoib_cm_get(neigh
)) {
622 ipoib_neigh_free(neigh
);
625 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
)
626 __skb_queue_tail(&neigh
->queue
, skb
);
628 ipoib_warn(priv
, "queue length limit %d. Packet drop.\n",
629 skb_queue_len(&neigh
->queue
));
633 spin_unlock_irqrestore(&priv
->lock
, flags
);
634 ipoib_send(dev
, skb
, path
->ah
, IPOIB_QPN(daddr
));
635 ipoib_neigh_put(neigh
);
641 if (!path
->query
&& path_rec_start(dev
, path
))
643 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
)
644 __skb_queue_tail(&neigh
->queue
, skb
);
649 spin_unlock_irqrestore(&priv
->lock
, flags
);
650 ipoib_neigh_put(neigh
);
654 ipoib_neigh_free(neigh
);
656 ++dev
->stats
.tx_dropped
;
657 dev_kfree_skb_any(skb
);
659 spin_unlock_irqrestore(&priv
->lock
, flags
);
660 ipoib_neigh_put(neigh
);
663 static void unicast_arp_send(struct sk_buff
*skb
, struct net_device
*dev
,
666 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
667 struct ipoib_path
*path
;
670 spin_lock_irqsave(&priv
->lock
, flags
);
672 path
= __path_find(dev
, cb
->hwaddr
+ 4);
673 if (!path
|| !path
->valid
) {
677 path
= path_rec_create(dev
, cb
->hwaddr
+ 4);
681 if (skb_queue_len(&path
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
682 __skb_queue_tail(&path
->queue
, skb
);
684 ++dev
->stats
.tx_dropped
;
685 dev_kfree_skb_any(skb
);
688 if (!path
->query
&& path_rec_start(dev
, path
)) {
689 spin_unlock_irqrestore(&priv
->lock
, flags
);
691 path_free(dev
, path
);
694 __path_add(dev
, path
);
696 ++dev
->stats
.tx_dropped
;
697 dev_kfree_skb_any(skb
);
700 spin_unlock_irqrestore(&priv
->lock
, flags
);
705 ipoib_dbg(priv
, "Send unicast ARP to %04x\n",
706 be16_to_cpu(path
->pathrec
.dlid
));
708 spin_unlock_irqrestore(&priv
->lock
, flags
);
709 ipoib_send(dev
, skb
, path
->ah
, IPOIB_QPN(cb
->hwaddr
));
711 } else if ((path
->query
|| !path_rec_start(dev
, path
)) &&
712 skb_queue_len(&path
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
713 __skb_queue_tail(&path
->queue
, skb
);
715 ++dev
->stats
.tx_dropped
;
716 dev_kfree_skb_any(skb
);
719 spin_unlock_irqrestore(&priv
->lock
, flags
);
722 static int ipoib_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
724 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
725 struct ipoib_neigh
*neigh
;
726 struct ipoib_cb
*cb
= ipoib_skb_cb(skb
);
727 struct ipoib_header
*header
;
730 header
= (struct ipoib_header
*) skb
->data
;
732 if (unlikely(cb
->hwaddr
[4] == 0xff)) {
733 /* multicast, arrange "if" according to probability */
734 if ((header
->proto
!= htons(ETH_P_IP
)) &&
735 (header
->proto
!= htons(ETH_P_IPV6
)) &&
736 (header
->proto
!= htons(ETH_P_ARP
)) &&
737 (header
->proto
!= htons(ETH_P_RARP
)) &&
738 (header
->proto
!= htons(ETH_P_TIPC
))) {
739 /* ethertype not supported by IPoIB */
740 ++dev
->stats
.tx_dropped
;
741 dev_kfree_skb_any(skb
);
744 /* Add in the P_Key for multicast*/
745 cb
->hwaddr
[8] = (priv
->pkey
>> 8) & 0xff;
746 cb
->hwaddr
[9] = priv
->pkey
& 0xff;
748 neigh
= ipoib_neigh_get(dev
, cb
->hwaddr
);
750 goto send_using_neigh
;
751 ipoib_mcast_send(dev
, cb
->hwaddr
, skb
);
755 /* unicast, arrange "switch" according to probability */
756 switch (header
->proto
) {
757 case htons(ETH_P_IP
):
758 case htons(ETH_P_IPV6
):
759 case htons(ETH_P_TIPC
):
760 neigh
= ipoib_neigh_get(dev
, cb
->hwaddr
);
761 if (unlikely(!neigh
)) {
762 neigh_add_path(skb
, cb
->hwaddr
, dev
);
766 case htons(ETH_P_ARP
):
767 case htons(ETH_P_RARP
):
768 /* for unicast ARP and RARP should always perform path find */
769 unicast_arp_send(skb
, dev
, cb
);
772 /* ethertype not supported by IPoIB */
773 ++dev
->stats
.tx_dropped
;
774 dev_kfree_skb_any(skb
);
779 /* note we now hold a ref to neigh */
780 if (ipoib_cm_get(neigh
)) {
781 if (ipoib_cm_up(neigh
)) {
782 ipoib_cm_send(dev
, skb
, ipoib_cm_get(neigh
));
785 } else if (neigh
->ah
) {
786 ipoib_send(dev
, skb
, neigh
->ah
, IPOIB_QPN(cb
->hwaddr
));
790 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
791 spin_lock_irqsave(&priv
->lock
, flags
);
792 __skb_queue_tail(&neigh
->queue
, skb
);
793 spin_unlock_irqrestore(&priv
->lock
, flags
);
795 ++dev
->stats
.tx_dropped
;
796 dev_kfree_skb_any(skb
);
800 ipoib_neigh_put(neigh
);
805 static void ipoib_timeout(struct net_device
*dev
)
807 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
809 ipoib_warn(priv
, "transmit timeout: latency %d msecs\n",
810 jiffies_to_msecs(jiffies
- dev
->trans_start
));
811 ipoib_warn(priv
, "queue stopped %d, tx_head %u, tx_tail %u\n",
812 netif_queue_stopped(dev
),
813 priv
->tx_head
, priv
->tx_tail
);
814 /* XXX reset QP, etc. */
817 static int ipoib_hard_header(struct sk_buff
*skb
,
818 struct net_device
*dev
,
820 const void *daddr
, const void *saddr
, unsigned len
)
822 struct ipoib_header
*header
;
823 struct ipoib_cb
*cb
= ipoib_skb_cb(skb
);
825 header
= (struct ipoib_header
*) skb_push(skb
, sizeof *header
);
827 header
->proto
= htons(type
);
828 header
->reserved
= 0;
831 * we don't rely on dst_entry structure, always stuff the
832 * destination address into skb->cb so we can figure out where
833 * to send the packet later.
835 memcpy(cb
->hwaddr
, daddr
, INFINIBAND_ALEN
);
837 return sizeof *header
;
840 static void ipoib_set_mcast_list(struct net_device
*dev
)
842 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
844 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
845 ipoib_dbg(priv
, "IPOIB_FLAG_OPER_UP not set");
849 queue_work(priv
->wq
, &priv
->restart_task
);
852 static int ipoib_get_iflink(const struct net_device
*dev
)
854 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
856 /* parent interface */
857 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
))
860 /* child/vlan interface */
861 return priv
->parent
->ifindex
;
864 static u32
ipoib_addr_hash(struct ipoib_neigh_hash
*htbl
, u8
*daddr
)
867 * Use only the address parts that contributes to spreading
868 * The subnet prefix is not used as one can not connect to
869 * same remote port (GUID) using the same remote QPN via two
872 /* qpn octets[1:4) & port GUID octets[12:20) */
873 u32
*d32
= (u32
*) daddr
;
876 hv
= jhash_3words(d32
[3], d32
[4], IPOIB_QPN_MASK
& d32
[0], 0);
877 return hv
& htbl
->mask
;
880 struct ipoib_neigh
*ipoib_neigh_get(struct net_device
*dev
, u8
*daddr
)
882 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
883 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
884 struct ipoib_neigh_hash
*htbl
;
885 struct ipoib_neigh
*neigh
= NULL
;
890 htbl
= rcu_dereference_bh(ntbl
->htbl
);
895 hash_val
= ipoib_addr_hash(htbl
, daddr
);
896 for (neigh
= rcu_dereference_bh(htbl
->buckets
[hash_val
]);
898 neigh
= rcu_dereference_bh(neigh
->hnext
)) {
899 if (memcmp(daddr
, neigh
->daddr
, INFINIBAND_ALEN
) == 0) {
900 /* found, take one ref on behalf of the caller */
901 if (!atomic_inc_not_zero(&neigh
->refcnt
)) {
906 neigh
->alive
= jiffies
;
912 rcu_read_unlock_bh();
916 static void __ipoib_reap_neigh(struct ipoib_dev_priv
*priv
)
918 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
919 struct ipoib_neigh_hash
*htbl
;
920 unsigned long neigh_obsolete
;
925 if (test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
928 spin_lock_irqsave(&priv
->lock
, flags
);
930 htbl
= rcu_dereference_protected(ntbl
->htbl
,
931 lockdep_is_held(&priv
->lock
));
936 /* neigh is obsolete if it was idle for two GC periods */
937 dt
= 2 * arp_tbl
.gc_interval
;
938 neigh_obsolete
= jiffies
- dt
;
939 /* handle possible race condition */
940 if (test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
943 for (i
= 0; i
< htbl
->size
; i
++) {
944 struct ipoib_neigh
*neigh
;
945 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
947 while ((neigh
= rcu_dereference_protected(*np
,
948 lockdep_is_held(&priv
->lock
))) != NULL
) {
949 /* was the neigh idle for two GC periods */
950 if (time_after(neigh_obsolete
, neigh
->alive
)) {
951 rcu_assign_pointer(*np
,
952 rcu_dereference_protected(neigh
->hnext
,
953 lockdep_is_held(&priv
->lock
)));
954 /* remove from path/mc list */
955 list_del(&neigh
->list
);
956 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
965 spin_unlock_irqrestore(&priv
->lock
, flags
);
968 static void ipoib_reap_neigh(struct work_struct
*work
)
970 struct ipoib_dev_priv
*priv
=
971 container_of(work
, struct ipoib_dev_priv
, neigh_reap_task
.work
);
973 __ipoib_reap_neigh(priv
);
975 if (!test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
976 queue_delayed_work(priv
->wq
, &priv
->neigh_reap_task
,
977 arp_tbl
.gc_interval
);
981 static struct ipoib_neigh
*ipoib_neigh_ctor(u8
*daddr
,
982 struct net_device
*dev
)
984 struct ipoib_neigh
*neigh
;
986 neigh
= kzalloc(sizeof *neigh
, GFP_ATOMIC
);
991 memcpy(&neigh
->daddr
, daddr
, sizeof(neigh
->daddr
));
992 skb_queue_head_init(&neigh
->queue
);
993 INIT_LIST_HEAD(&neigh
->list
);
994 ipoib_cm_set(neigh
, NULL
);
995 /* one ref on behalf of the caller */
996 atomic_set(&neigh
->refcnt
, 1);
1001 struct ipoib_neigh
*ipoib_neigh_alloc(u8
*daddr
,
1002 struct net_device
*dev
)
1004 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1005 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1006 struct ipoib_neigh_hash
*htbl
;
1007 struct ipoib_neigh
*neigh
;
1010 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1011 lockdep_is_held(&priv
->lock
));
1017 /* need to add a new neigh, but maybe some other thread succeeded?
1018 * recalc hash, maybe hash resize took place so we do a search
1020 hash_val
= ipoib_addr_hash(htbl
, daddr
);
1021 for (neigh
= rcu_dereference_protected(htbl
->buckets
[hash_val
],
1022 lockdep_is_held(&priv
->lock
));
1024 neigh
= rcu_dereference_protected(neigh
->hnext
,
1025 lockdep_is_held(&priv
->lock
))) {
1026 if (memcmp(daddr
, neigh
->daddr
, INFINIBAND_ALEN
) == 0) {
1027 /* found, take one ref on behalf of the caller */
1028 if (!atomic_inc_not_zero(&neigh
->refcnt
)) {
1033 neigh
->alive
= jiffies
;
1038 neigh
= ipoib_neigh_ctor(daddr
, dev
);
1042 /* one ref on behalf of the hash table */
1043 atomic_inc(&neigh
->refcnt
);
1044 neigh
->alive
= jiffies
;
1046 rcu_assign_pointer(neigh
->hnext
,
1047 rcu_dereference_protected(htbl
->buckets
[hash_val
],
1048 lockdep_is_held(&priv
->lock
)));
1049 rcu_assign_pointer(htbl
->buckets
[hash_val
], neigh
);
1050 atomic_inc(&ntbl
->entries
);
1057 void ipoib_neigh_dtor(struct ipoib_neigh
*neigh
)
1059 /* neigh reference count was dropprd to zero */
1060 struct net_device
*dev
= neigh
->dev
;
1061 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1062 struct sk_buff
*skb
;
1064 ipoib_put_ah(neigh
->ah
);
1065 while ((skb
= __skb_dequeue(&neigh
->queue
))) {
1066 ++dev
->stats
.tx_dropped
;
1067 dev_kfree_skb_any(skb
);
1069 if (ipoib_cm_get(neigh
))
1070 ipoib_cm_destroy_tx(ipoib_cm_get(neigh
));
1071 ipoib_dbg(netdev_priv(dev
),
1072 "neigh free for %06x %pI6\n",
1073 IPOIB_QPN(neigh
->daddr
),
1076 if (atomic_dec_and_test(&priv
->ntbl
.entries
)) {
1077 if (test_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
))
1078 complete(&priv
->ntbl
.flushed
);
1082 static void ipoib_neigh_reclaim(struct rcu_head
*rp
)
1084 /* Called as a result of removal from hash table */
1085 struct ipoib_neigh
*neigh
= container_of(rp
, struct ipoib_neigh
, rcu
);
1086 /* note TX context may hold another ref */
1087 ipoib_neigh_put(neigh
);
1090 void ipoib_neigh_free(struct ipoib_neigh
*neigh
)
1092 struct net_device
*dev
= neigh
->dev
;
1093 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1094 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1095 struct ipoib_neigh_hash
*htbl
;
1096 struct ipoib_neigh __rcu
**np
;
1097 struct ipoib_neigh
*n
;
1100 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1101 lockdep_is_held(&priv
->lock
));
1105 hash_val
= ipoib_addr_hash(htbl
, neigh
->daddr
);
1106 np
= &htbl
->buckets
[hash_val
];
1107 for (n
= rcu_dereference_protected(*np
,
1108 lockdep_is_held(&priv
->lock
));
1110 n
= rcu_dereference_protected(*np
,
1111 lockdep_is_held(&priv
->lock
))) {
1114 rcu_assign_pointer(*np
,
1115 rcu_dereference_protected(neigh
->hnext
,
1116 lockdep_is_held(&priv
->lock
)));
1117 /* remove from parent list */
1118 list_del(&neigh
->list
);
1119 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1127 static int ipoib_neigh_hash_init(struct ipoib_dev_priv
*priv
)
1129 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1130 struct ipoib_neigh_hash
*htbl
;
1131 struct ipoib_neigh
**buckets
;
1134 clear_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1136 htbl
= kzalloc(sizeof(*htbl
), GFP_KERNEL
);
1139 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1140 size
= roundup_pow_of_two(arp_tbl
.gc_thresh3
);
1141 buckets
= kzalloc(size
* sizeof(*buckets
), GFP_KERNEL
);
1147 htbl
->mask
= (size
- 1);
1148 htbl
->buckets
= buckets
;
1151 atomic_set(&ntbl
->entries
, 0);
1153 /* start garbage collection */
1154 clear_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1155 queue_delayed_work(priv
->wq
, &priv
->neigh_reap_task
,
1156 arp_tbl
.gc_interval
);
1161 static void neigh_hash_free_rcu(struct rcu_head
*head
)
1163 struct ipoib_neigh_hash
*htbl
= container_of(head
,
1164 struct ipoib_neigh_hash
,
1166 struct ipoib_neigh __rcu
**buckets
= htbl
->buckets
;
1167 struct ipoib_neigh_table
*ntbl
= htbl
->ntbl
;
1171 complete(&ntbl
->deleted
);
1174 void ipoib_del_neighs_by_gid(struct net_device
*dev
, u8
*gid
)
1176 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1177 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1178 struct ipoib_neigh_hash
*htbl
;
1179 unsigned long flags
;
1182 /* remove all neigh connected to a given path or mcast */
1183 spin_lock_irqsave(&priv
->lock
, flags
);
1185 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1186 lockdep_is_held(&priv
->lock
));
1191 for (i
= 0; i
< htbl
->size
; i
++) {
1192 struct ipoib_neigh
*neigh
;
1193 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
1195 while ((neigh
= rcu_dereference_protected(*np
,
1196 lockdep_is_held(&priv
->lock
))) != NULL
) {
1197 /* delete neighs belong to this parent */
1198 if (!memcmp(gid
, neigh
->daddr
+ 4, sizeof (union ib_gid
))) {
1199 rcu_assign_pointer(*np
,
1200 rcu_dereference_protected(neigh
->hnext
,
1201 lockdep_is_held(&priv
->lock
)));
1202 /* remove from parent list */
1203 list_del(&neigh
->list
);
1204 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1212 spin_unlock_irqrestore(&priv
->lock
, flags
);
1215 static void ipoib_flush_neighs(struct ipoib_dev_priv
*priv
)
1217 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1218 struct ipoib_neigh_hash
*htbl
;
1219 unsigned long flags
;
1220 int i
, wait_flushed
= 0;
1222 init_completion(&priv
->ntbl
.flushed
);
1224 spin_lock_irqsave(&priv
->lock
, flags
);
1226 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1227 lockdep_is_held(&priv
->lock
));
1231 wait_flushed
= atomic_read(&priv
->ntbl
.entries
);
1235 for (i
= 0; i
< htbl
->size
; i
++) {
1236 struct ipoib_neigh
*neigh
;
1237 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
1239 while ((neigh
= rcu_dereference_protected(*np
,
1240 lockdep_is_held(&priv
->lock
))) != NULL
) {
1241 rcu_assign_pointer(*np
,
1242 rcu_dereference_protected(neigh
->hnext
,
1243 lockdep_is_held(&priv
->lock
)));
1244 /* remove from path/mc list */
1245 list_del(&neigh
->list
);
1246 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1251 rcu_assign_pointer(ntbl
->htbl
, NULL
);
1252 call_rcu(&htbl
->rcu
, neigh_hash_free_rcu
);
1255 spin_unlock_irqrestore(&priv
->lock
, flags
);
1257 wait_for_completion(&priv
->ntbl
.flushed
);
1260 static void ipoib_neigh_hash_uninit(struct net_device
*dev
)
1262 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1265 ipoib_dbg(priv
, "ipoib_neigh_hash_uninit\n");
1266 init_completion(&priv
->ntbl
.deleted
);
1267 set_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1269 /* Stop GC if called at init fail need to cancel work */
1270 stopped
= test_and_set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1272 cancel_delayed_work(&priv
->neigh_reap_task
);
1274 ipoib_flush_neighs(priv
);
1276 wait_for_completion(&priv
->ntbl
.deleted
);
1280 int ipoib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
1282 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1284 /* Allocate RX/TX "rings" to hold queued skbs */
1285 priv
->rx_ring
= kzalloc(ipoib_recvq_size
* sizeof *priv
->rx_ring
,
1287 if (!priv
->rx_ring
) {
1288 printk(KERN_WARNING
"%s: failed to allocate RX ring (%d entries)\n",
1289 ca
->name
, ipoib_recvq_size
);
1293 priv
->tx_ring
= vzalloc(ipoib_sendq_size
* sizeof *priv
->tx_ring
);
1294 if (!priv
->tx_ring
) {
1295 printk(KERN_WARNING
"%s: failed to allocate TX ring (%d entries)\n",
1296 ca
->name
, ipoib_sendq_size
);
1297 goto out_rx_ring_cleanup
;
1300 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
1302 if (ipoib_ib_dev_init(dev
, ca
, port
))
1303 goto out_tx_ring_cleanup
;
1306 * Must be after ipoib_ib_dev_init so we can allocate a per
1307 * device wq there and use it here
1309 if (ipoib_neigh_hash_init(priv
) < 0)
1310 goto out_dev_uninit
;
1315 ipoib_ib_dev_cleanup(dev
);
1317 out_tx_ring_cleanup
:
1318 vfree(priv
->tx_ring
);
1320 out_rx_ring_cleanup
:
1321 kfree(priv
->rx_ring
);
1327 void ipoib_dev_cleanup(struct net_device
*dev
)
1329 struct ipoib_dev_priv
*priv
= netdev_priv(dev
), *cpriv
, *tcpriv
;
1334 ipoib_delete_debug_files(dev
);
1336 /* Delete any child interfaces first */
1337 list_for_each_entry_safe(cpriv
, tcpriv
, &priv
->child_intfs
, list
) {
1338 /* Stop GC on child */
1339 set_bit(IPOIB_STOP_NEIGH_GC
, &cpriv
->flags
);
1340 cancel_delayed_work(&cpriv
->neigh_reap_task
);
1341 unregister_netdevice_queue(cpriv
->dev
, &head
);
1343 unregister_netdevice_many(&head
);
1346 * Must be before ipoib_ib_dev_cleanup or we delete an in use
1349 ipoib_neigh_hash_uninit(dev
);
1351 ipoib_ib_dev_cleanup(dev
);
1353 kfree(priv
->rx_ring
);
1354 vfree(priv
->tx_ring
);
1356 priv
->rx_ring
= NULL
;
1357 priv
->tx_ring
= NULL
;
1360 static const struct header_ops ipoib_header_ops
= {
1361 .create
= ipoib_hard_header
,
1364 static const struct net_device_ops ipoib_netdev_ops
= {
1365 .ndo_uninit
= ipoib_uninit
,
1366 .ndo_open
= ipoib_open
,
1367 .ndo_stop
= ipoib_stop
,
1368 .ndo_change_mtu
= ipoib_change_mtu
,
1369 .ndo_fix_features
= ipoib_fix_features
,
1370 .ndo_start_xmit
= ipoib_start_xmit
,
1371 .ndo_tx_timeout
= ipoib_timeout
,
1372 .ndo_set_rx_mode
= ipoib_set_mcast_list
,
1373 .ndo_get_iflink
= ipoib_get_iflink
,
1376 void ipoib_setup(struct net_device
*dev
)
1378 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1380 dev
->netdev_ops
= &ipoib_netdev_ops
;
1381 dev
->header_ops
= &ipoib_header_ops
;
1383 ipoib_set_ethtool_ops(dev
);
1385 netif_napi_add(dev
, &priv
->napi
, ipoib_poll
, NAPI_POLL_WEIGHT
);
1387 dev
->watchdog_timeo
= HZ
;
1389 dev
->flags
|= IFF_BROADCAST
| IFF_MULTICAST
;
1391 dev
->hard_header_len
= IPOIB_ENCAP_LEN
;
1392 dev
->addr_len
= INFINIBAND_ALEN
;
1393 dev
->type
= ARPHRD_INFINIBAND
;
1394 dev
->tx_queue_len
= ipoib_sendq_size
* 2;
1395 dev
->features
= (NETIF_F_VLAN_CHALLENGED
|
1397 netif_keep_dst(dev
);
1399 memcpy(dev
->broadcast
, ipv4_bcast_addr
, INFINIBAND_ALEN
);
1403 spin_lock_init(&priv
->lock
);
1405 init_rwsem(&priv
->vlan_rwsem
);
1407 INIT_LIST_HEAD(&priv
->path_list
);
1408 INIT_LIST_HEAD(&priv
->child_intfs
);
1409 INIT_LIST_HEAD(&priv
->dead_ahs
);
1410 INIT_LIST_HEAD(&priv
->multicast_list
);
1412 INIT_DELAYED_WORK(&priv
->mcast_task
, ipoib_mcast_join_task
);
1413 INIT_WORK(&priv
->carrier_on_task
, ipoib_mcast_carrier_on_task
);
1414 INIT_WORK(&priv
->flush_light
, ipoib_ib_dev_flush_light
);
1415 INIT_WORK(&priv
->flush_normal
, ipoib_ib_dev_flush_normal
);
1416 INIT_WORK(&priv
->flush_heavy
, ipoib_ib_dev_flush_heavy
);
1417 INIT_WORK(&priv
->restart_task
, ipoib_mcast_restart_task
);
1418 INIT_DELAYED_WORK(&priv
->ah_reap_task
, ipoib_reap_ah
);
1419 INIT_DELAYED_WORK(&priv
->neigh_reap_task
, ipoib_reap_neigh
);
1422 struct ipoib_dev_priv
*ipoib_intf_alloc(const char *name
)
1424 struct net_device
*dev
;
1426 dev
= alloc_netdev((int)sizeof(struct ipoib_dev_priv
), name
,
1427 NET_NAME_UNKNOWN
, ipoib_setup
);
1431 return netdev_priv(dev
);
1434 static ssize_t
show_pkey(struct device
*dev
,
1435 struct device_attribute
*attr
, char *buf
)
1437 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1439 return sprintf(buf
, "0x%04x\n", priv
->pkey
);
1441 static DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
1443 static ssize_t
show_umcast(struct device
*dev
,
1444 struct device_attribute
*attr
, char *buf
)
1446 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1448 return sprintf(buf
, "%d\n", test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
));
1451 void ipoib_set_umcast(struct net_device
*ndev
, int umcast_val
)
1453 struct ipoib_dev_priv
*priv
= netdev_priv(ndev
);
1455 if (umcast_val
> 0) {
1456 set_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
);
1457 ipoib_warn(priv
, "ignoring multicast groups joined directly "
1460 clear_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
);
1463 static ssize_t
set_umcast(struct device
*dev
,
1464 struct device_attribute
*attr
,
1465 const char *buf
, size_t count
)
1467 unsigned long umcast_val
= simple_strtoul(buf
, NULL
, 0);
1469 ipoib_set_umcast(to_net_dev(dev
), umcast_val
);
1473 static DEVICE_ATTR(umcast
, S_IWUSR
| S_IRUGO
, show_umcast
, set_umcast
);
1475 int ipoib_add_umcast_attr(struct net_device
*dev
)
1477 return device_create_file(&dev
->dev
, &dev_attr_umcast
);
1480 static ssize_t
create_child(struct device
*dev
,
1481 struct device_attribute
*attr
,
1482 const char *buf
, size_t count
)
1487 if (sscanf(buf
, "%i", &pkey
) != 1)
1490 if (pkey
<= 0 || pkey
> 0xffff || pkey
== 0x8000)
1494 * Set the full membership bit, so that we join the right
1495 * broadcast group, etc.
1499 ret
= ipoib_vlan_add(to_net_dev(dev
), pkey
);
1501 return ret
? ret
: count
;
1503 static DEVICE_ATTR(create_child
, S_IWUSR
, NULL
, create_child
);
1505 static ssize_t
delete_child(struct device
*dev
,
1506 struct device_attribute
*attr
,
1507 const char *buf
, size_t count
)
1512 if (sscanf(buf
, "%i", &pkey
) != 1)
1515 if (pkey
< 0 || pkey
> 0xffff)
1518 ret
= ipoib_vlan_delete(to_net_dev(dev
), pkey
);
1520 return ret
? ret
: count
;
1523 static DEVICE_ATTR(delete_child
, S_IWUSR
, NULL
, delete_child
);
1525 int ipoib_add_pkey_attr(struct net_device
*dev
)
1527 return device_create_file(&dev
->dev
, &dev_attr_pkey
);
1530 int ipoib_set_dev_features(struct ipoib_dev_priv
*priv
, struct ib_device
*hca
)
1532 struct ib_device_attr
*device_attr
;
1533 int result
= -ENOMEM
;
1535 device_attr
= kmalloc(sizeof *device_attr
, GFP_KERNEL
);
1537 printk(KERN_WARNING
"%s: allocation of %zu bytes failed\n",
1538 hca
->name
, sizeof *device_attr
);
1542 result
= ib_query_device(hca
, device_attr
);
1544 printk(KERN_WARNING
"%s: ib_query_device failed (ret = %d)\n",
1549 priv
->hca_caps
= device_attr
->device_cap_flags
;
1553 if (priv
->hca_caps
& IB_DEVICE_UD_IP_CSUM
) {
1554 priv
->dev
->hw_features
= NETIF_F_SG
|
1555 NETIF_F_IP_CSUM
| NETIF_F_RXCSUM
;
1557 if (priv
->hca_caps
& IB_DEVICE_UD_TSO
)
1558 priv
->dev
->hw_features
|= NETIF_F_TSO
;
1560 priv
->dev
->features
|= priv
->dev
->hw_features
;
1566 static struct net_device
*ipoib_add_port(const char *format
,
1567 struct ib_device
*hca
, u8 port
)
1569 struct ipoib_dev_priv
*priv
;
1570 struct ib_port_attr attr
;
1571 int result
= -ENOMEM
;
1573 priv
= ipoib_intf_alloc(format
);
1575 goto alloc_mem_failed
;
1577 SET_NETDEV_DEV(priv
->dev
, hca
->dma_device
);
1578 priv
->dev
->dev_id
= port
- 1;
1580 if (!ib_query_port(hca
, port
, &attr
))
1581 priv
->max_ib_mtu
= ib_mtu_enum_to_int(attr
.max_mtu
);
1583 printk(KERN_WARNING
"%s: ib_query_port %d failed\n",
1585 goto device_init_failed
;
1588 /* MTU will be reset when mcast join happens */
1589 priv
->dev
->mtu
= IPOIB_UD_MTU(priv
->max_ib_mtu
);
1590 priv
->mcast_mtu
= priv
->admin_mtu
= priv
->dev
->mtu
;
1592 priv
->dev
->neigh_priv_len
= sizeof(struct ipoib_neigh
);
1594 result
= ib_query_pkey(hca
, port
, 0, &priv
->pkey
);
1596 printk(KERN_WARNING
"%s: ib_query_pkey port %d failed (ret = %d)\n",
1597 hca
->name
, port
, result
);
1598 goto device_init_failed
;
1601 if (ipoib_set_dev_features(priv
, hca
))
1602 goto device_init_failed
;
1605 * Set the full membership bit, so that we join the right
1606 * broadcast group, etc.
1608 priv
->pkey
|= 0x8000;
1610 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
1611 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
1613 result
= ib_query_gid(hca
, port
, 0, &priv
->local_gid
);
1615 printk(KERN_WARNING
"%s: ib_query_gid port %d failed (ret = %d)\n",
1616 hca
->name
, port
, result
);
1617 goto device_init_failed
;
1619 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
1621 result
= ipoib_dev_init(priv
->dev
, hca
, port
);
1623 printk(KERN_WARNING
"%s: failed to initialize port %d (ret = %d)\n",
1624 hca
->name
, port
, result
);
1625 goto device_init_failed
;
1628 INIT_IB_EVENT_HANDLER(&priv
->event_handler
,
1629 priv
->ca
, ipoib_event
);
1630 result
= ib_register_event_handler(&priv
->event_handler
);
1632 printk(KERN_WARNING
"%s: ib_register_event_handler failed for "
1633 "port %d (ret = %d)\n",
1634 hca
->name
, port
, result
);
1638 result
= register_netdev(priv
->dev
);
1640 printk(KERN_WARNING
"%s: couldn't register ipoib port %d; error %d\n",
1641 hca
->name
, port
, result
);
1642 goto register_failed
;
1645 ipoib_create_debug_files(priv
->dev
);
1647 if (ipoib_cm_add_mode_attr(priv
->dev
))
1649 if (ipoib_add_pkey_attr(priv
->dev
))
1651 if (ipoib_add_umcast_attr(priv
->dev
))
1653 if (device_create_file(&priv
->dev
->dev
, &dev_attr_create_child
))
1655 if (device_create_file(&priv
->dev
->dev
, &dev_attr_delete_child
))
1661 ipoib_delete_debug_files(priv
->dev
);
1662 unregister_netdev(priv
->dev
);
1665 ib_unregister_event_handler(&priv
->event_handler
);
1666 flush_workqueue(ipoib_workqueue
);
1667 /* Stop GC if started before flush */
1668 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1669 cancel_delayed_work(&priv
->neigh_reap_task
);
1670 flush_workqueue(priv
->wq
);
1673 ipoib_dev_cleanup(priv
->dev
);
1676 free_netdev(priv
->dev
);
1679 return ERR_PTR(result
);
1682 static void ipoib_add_one(struct ib_device
*device
)
1684 struct list_head
*dev_list
;
1685 struct net_device
*dev
;
1686 struct ipoib_dev_priv
*priv
;
1689 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1692 dev_list
= kmalloc(sizeof *dev_list
, GFP_KERNEL
);
1696 INIT_LIST_HEAD(dev_list
);
1698 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
1703 e
= device
->phys_port_cnt
;
1706 for (p
= s
; p
<= e
; ++p
) {
1707 if (rdma_port_get_link_layer(device
, p
) != IB_LINK_LAYER_INFINIBAND
)
1709 dev
= ipoib_add_port("ib%d", device
, p
);
1711 priv
= netdev_priv(dev
);
1712 list_add_tail(&priv
->list
, dev_list
);
1716 ib_set_client_data(device
, &ipoib_client
, dev_list
);
1719 static void ipoib_remove_one(struct ib_device
*device
)
1721 struct ipoib_dev_priv
*priv
, *tmp
;
1722 struct list_head
*dev_list
;
1724 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1727 dev_list
= ib_get_client_data(device
, &ipoib_client
);
1731 list_for_each_entry_safe(priv
, tmp
, dev_list
, list
) {
1732 ib_unregister_event_handler(&priv
->event_handler
);
1733 flush_workqueue(ipoib_workqueue
);
1736 dev_change_flags(priv
->dev
, priv
->dev
->flags
& ~IFF_UP
);
1740 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1741 cancel_delayed_work(&priv
->neigh_reap_task
);
1742 flush_workqueue(priv
->wq
);
1744 unregister_netdev(priv
->dev
);
1745 free_netdev(priv
->dev
);
1751 static int __init
ipoib_init_module(void)
1755 ipoib_recvq_size
= roundup_pow_of_two(ipoib_recvq_size
);
1756 ipoib_recvq_size
= min(ipoib_recvq_size
, IPOIB_MAX_QUEUE_SIZE
);
1757 ipoib_recvq_size
= max(ipoib_recvq_size
, IPOIB_MIN_QUEUE_SIZE
);
1759 ipoib_sendq_size
= roundup_pow_of_two(ipoib_sendq_size
);
1760 ipoib_sendq_size
= min(ipoib_sendq_size
, IPOIB_MAX_QUEUE_SIZE
);
1761 ipoib_sendq_size
= max3(ipoib_sendq_size
, 2 * MAX_SEND_CQE
, IPOIB_MIN_QUEUE_SIZE
);
1762 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1763 ipoib_max_conn_qp
= min(ipoib_max_conn_qp
, IPOIB_CM_MAX_CONN_QP
);
1767 * When copying small received packets, we only copy from the
1768 * linear data part of the SKB, so we rely on this condition.
1770 BUILD_BUG_ON(IPOIB_CM_COPYBREAK
> IPOIB_CM_HEAD_SIZE
);
1772 ret
= ipoib_register_debugfs();
1777 * We create a global workqueue here that is used for all flush
1778 * operations. However, if you attempt to flush a workqueue
1779 * from a task on that same workqueue, it deadlocks the system.
1780 * We want to be able to flush the tasks associated with a
1781 * specific net device, so we also create a workqueue for each
1782 * netdevice. We queue up the tasks for that device only on
1783 * its private workqueue, and we only queue up flush events
1784 * on our global flush workqueue. This avoids the deadlocks.
1786 ipoib_workqueue
= create_singlethread_workqueue("ipoib_flush");
1787 if (!ipoib_workqueue
) {
1792 ib_sa_register_client(&ipoib_sa_client
);
1794 ret
= ib_register_client(&ipoib_client
);
1798 ret
= ipoib_netlink_init();
1805 ib_unregister_client(&ipoib_client
);
1808 ib_sa_unregister_client(&ipoib_sa_client
);
1809 destroy_workqueue(ipoib_workqueue
);
1812 ipoib_unregister_debugfs();
1817 static void __exit
ipoib_cleanup_module(void)
1819 ipoib_netlink_fini();
1820 ib_unregister_client(&ipoib_client
);
1821 ib_sa_unregister_client(&ipoib_sa_client
);
1822 ipoib_unregister_debugfs();
1823 destroy_workqueue(ipoib_workqueue
);
1826 module_init(ipoib_init_module
);
1827 module_exit(ipoib_cleanup_module
);