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 netdev_features_t
ipoib_fix_features(struct net_device
*dev
, netdev_features_t features
)
178 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
180 if (test_bit(IPOIB_FLAG_ADMIN_CM
, &priv
->flags
))
181 features
&= ~(NETIF_F_SG
| NETIF_F_IP_CSUM
| NETIF_F_TSO
);
186 static int ipoib_change_mtu(struct net_device
*dev
, int new_mtu
)
188 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
190 /* dev->mtu > 2K ==> connected mode */
191 if (ipoib_cm_admin_enabled(dev
)) {
192 if (new_mtu
> ipoib_cm_max_mtu(dev
))
195 if (new_mtu
> priv
->mcast_mtu
)
196 ipoib_warn(priv
, "mtu > %d will cause multicast packet drops.\n",
203 if (new_mtu
> IPOIB_UD_MTU(priv
->max_ib_mtu
))
206 priv
->admin_mtu
= new_mtu
;
208 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
213 static struct ipoib_path
*__path_find(struct net_device
*dev
, void *gid
)
215 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
216 struct rb_node
*n
= priv
->path_tree
.rb_node
;
217 struct ipoib_path
*path
;
221 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
223 ret
= memcmp(gid
, path
->pathrec
.dgid
.raw
,
224 sizeof (union ib_gid
));
237 static int __path_add(struct net_device
*dev
, struct ipoib_path
*path
)
239 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
240 struct rb_node
**n
= &priv
->path_tree
.rb_node
;
241 struct rb_node
*pn
= NULL
;
242 struct ipoib_path
*tpath
;
247 tpath
= rb_entry(pn
, struct ipoib_path
, rb_node
);
249 ret
= memcmp(path
->pathrec
.dgid
.raw
, tpath
->pathrec
.dgid
.raw
,
250 sizeof (union ib_gid
));
259 rb_link_node(&path
->rb_node
, pn
, n
);
260 rb_insert_color(&path
->rb_node
, &priv
->path_tree
);
262 list_add_tail(&path
->list
, &priv
->path_list
);
267 static void path_free(struct net_device
*dev
, struct ipoib_path
*path
)
271 while ((skb
= __skb_dequeue(&path
->queue
)))
272 dev_kfree_skb_irq(skb
);
274 ipoib_dbg(netdev_priv(dev
), "path_free\n");
276 /* remove all neigh connected to this path */
277 ipoib_del_neighs_by_gid(dev
, path
->pathrec
.dgid
.raw
);
280 ipoib_put_ah(path
->ah
);
285 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
287 struct ipoib_path_iter
*ipoib_path_iter_init(struct net_device
*dev
)
289 struct ipoib_path_iter
*iter
;
291 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
296 memset(iter
->path
.pathrec
.dgid
.raw
, 0, 16);
298 if (ipoib_path_iter_next(iter
)) {
306 int ipoib_path_iter_next(struct ipoib_path_iter
*iter
)
308 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
310 struct ipoib_path
*path
;
313 spin_lock_irq(&priv
->lock
);
315 n
= rb_first(&priv
->path_tree
);
318 path
= rb_entry(n
, struct ipoib_path
, rb_node
);
320 if (memcmp(iter
->path
.pathrec
.dgid
.raw
, path
->pathrec
.dgid
.raw
,
321 sizeof (union ib_gid
)) < 0) {
330 spin_unlock_irq(&priv
->lock
);
335 void ipoib_path_iter_read(struct ipoib_path_iter
*iter
,
336 struct ipoib_path
*path
)
341 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
343 void ipoib_mark_paths_invalid(struct net_device
*dev
)
345 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
346 struct ipoib_path
*path
, *tp
;
348 spin_lock_irq(&priv
->lock
);
350 list_for_each_entry_safe(path
, tp
, &priv
->path_list
, list
) {
351 ipoib_dbg(priv
, "mark path LID 0x%04x GID %pI6 invalid\n",
352 be16_to_cpu(path
->pathrec
.dlid
),
353 path
->pathrec
.dgid
.raw
);
357 spin_unlock_irq(&priv
->lock
);
360 void ipoib_flush_paths(struct net_device
*dev
)
362 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
363 struct ipoib_path
*path
, *tp
;
364 LIST_HEAD(remove_list
);
367 netif_tx_lock_bh(dev
);
368 spin_lock_irqsave(&priv
->lock
, flags
);
370 list_splice_init(&priv
->path_list
, &remove_list
);
372 list_for_each_entry(path
, &remove_list
, list
)
373 rb_erase(&path
->rb_node
, &priv
->path_tree
);
375 list_for_each_entry_safe(path
, tp
, &remove_list
, list
) {
377 ib_sa_cancel_query(path
->query_id
, path
->query
);
378 spin_unlock_irqrestore(&priv
->lock
, flags
);
379 netif_tx_unlock_bh(dev
);
380 wait_for_completion(&path
->done
);
381 path_free(dev
, path
);
382 netif_tx_lock_bh(dev
);
383 spin_lock_irqsave(&priv
->lock
, flags
);
386 spin_unlock_irqrestore(&priv
->lock
, flags
);
387 netif_tx_unlock_bh(dev
);
390 static void path_rec_completion(int status
,
391 struct ib_sa_path_rec
*pathrec
,
394 struct ipoib_path
*path
= path_ptr
;
395 struct net_device
*dev
= path
->dev
;
396 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
397 struct ipoib_ah
*ah
= NULL
;
398 struct ipoib_ah
*old_ah
= NULL
;
399 struct ipoib_neigh
*neigh
, *tn
;
400 struct sk_buff_head skqueue
;
405 ipoib_dbg(priv
, "PathRec LID 0x%04x for GID %pI6\n",
406 be16_to_cpu(pathrec
->dlid
), pathrec
->dgid
.raw
);
408 ipoib_dbg(priv
, "PathRec status %d for GID %pI6\n",
409 status
, path
->pathrec
.dgid
.raw
);
411 skb_queue_head_init(&skqueue
);
414 struct ib_ah_attr av
;
416 if (!ib_init_ah_from_path(priv
->ca
, priv
->port
, pathrec
, &av
))
417 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
420 spin_lock_irqsave(&priv
->lock
, flags
);
422 if (!IS_ERR_OR_NULL(ah
)) {
423 path
->pathrec
= *pathrec
;
428 ipoib_dbg(priv
, "created address handle %p for LID 0x%04x, SL %d\n",
429 ah
, be16_to_cpu(pathrec
->dlid
), pathrec
->sl
);
431 while ((skb
= __skb_dequeue(&path
->queue
)))
432 __skb_queue_tail(&skqueue
, skb
);
434 list_for_each_entry_safe(neigh
, tn
, &path
->neigh_list
, list
) {
436 WARN_ON(neigh
->ah
!= old_ah
);
438 * Dropping the ah reference inside
439 * priv->lock is safe here, because we
440 * will hold one more reference from
441 * the original value of path->ah (ie
444 ipoib_put_ah(neigh
->ah
);
446 kref_get(&path
->ah
->ref
);
447 neigh
->ah
= path
->ah
;
449 if (ipoib_cm_enabled(dev
, neigh
->daddr
)) {
450 if (!ipoib_cm_get(neigh
))
451 ipoib_cm_set(neigh
, ipoib_cm_create_tx(dev
,
454 if (!ipoib_cm_get(neigh
)) {
455 list_del(&neigh
->list
);
456 ipoib_neigh_free(neigh
);
461 while ((skb
= __skb_dequeue(&neigh
->queue
)))
462 __skb_queue_tail(&skqueue
, skb
);
468 complete(&path
->done
);
470 spin_unlock_irqrestore(&priv
->lock
, flags
);
473 ipoib_put_ah(old_ah
);
475 while ((skb
= __skb_dequeue(&skqueue
))) {
477 if (dev_queue_xmit(skb
))
478 ipoib_warn(priv
, "dev_queue_xmit failed "
479 "to requeue packet\n");
483 static struct ipoib_path
*path_rec_create(struct net_device
*dev
, void *gid
)
485 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
486 struct ipoib_path
*path
;
488 if (!priv
->broadcast
)
491 path
= kzalloc(sizeof *path
, GFP_ATOMIC
);
497 skb_queue_head_init(&path
->queue
);
499 INIT_LIST_HEAD(&path
->neigh_list
);
501 memcpy(path
->pathrec
.dgid
.raw
, gid
, sizeof (union ib_gid
));
502 path
->pathrec
.sgid
= priv
->local_gid
;
503 path
->pathrec
.pkey
= cpu_to_be16(priv
->pkey
);
504 path
->pathrec
.numb_path
= 1;
505 path
->pathrec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
510 static int path_rec_start(struct net_device
*dev
,
511 struct ipoib_path
*path
)
513 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
515 ipoib_dbg(priv
, "Start path record lookup for %pI6\n",
516 path
->pathrec
.dgid
.raw
);
518 init_completion(&path
->done
);
521 ib_sa_path_rec_get(&ipoib_sa_client
, priv
->ca
, priv
->port
,
523 IB_SA_PATH_REC_DGID
|
524 IB_SA_PATH_REC_SGID
|
525 IB_SA_PATH_REC_NUMB_PATH
|
526 IB_SA_PATH_REC_TRAFFIC_CLASS
|
531 if (path
->query_id
< 0) {
532 ipoib_warn(priv
, "ib_sa_path_rec_get failed: %d\n", path
->query_id
);
534 complete(&path
->done
);
535 return path
->query_id
;
541 static void neigh_add_path(struct sk_buff
*skb
, u8
*daddr
,
542 struct net_device
*dev
)
544 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
545 struct ipoib_path
*path
;
546 struct ipoib_neigh
*neigh
;
549 spin_lock_irqsave(&priv
->lock
, flags
);
550 neigh
= ipoib_neigh_alloc(daddr
, dev
);
552 spin_unlock_irqrestore(&priv
->lock
, flags
);
553 ++dev
->stats
.tx_dropped
;
554 dev_kfree_skb_any(skb
);
558 path
= __path_find(dev
, daddr
+ 4);
560 path
= path_rec_create(dev
, daddr
+ 4);
564 __path_add(dev
, path
);
567 list_add_tail(&neigh
->list
, &path
->neigh_list
);
570 kref_get(&path
->ah
->ref
);
571 neigh
->ah
= path
->ah
;
573 if (ipoib_cm_enabled(dev
, neigh
->daddr
)) {
574 if (!ipoib_cm_get(neigh
))
575 ipoib_cm_set(neigh
, ipoib_cm_create_tx(dev
, path
, neigh
));
576 if (!ipoib_cm_get(neigh
)) {
577 list_del(&neigh
->list
);
578 ipoib_neigh_free(neigh
);
581 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
)
582 __skb_queue_tail(&neigh
->queue
, skb
);
584 ipoib_warn(priv
, "queue length limit %d. Packet drop.\n",
585 skb_queue_len(&neigh
->queue
));
589 spin_unlock_irqrestore(&priv
->lock
, flags
);
590 ipoib_send(dev
, skb
, path
->ah
, IPOIB_QPN(daddr
));
591 ipoib_neigh_put(neigh
);
597 if (!path
->query
&& path_rec_start(dev
, path
))
600 __skb_queue_tail(&neigh
->queue
, skb
);
603 spin_unlock_irqrestore(&priv
->lock
, flags
);
604 ipoib_neigh_put(neigh
);
608 list_del(&neigh
->list
);
611 ipoib_neigh_free(neigh
);
613 ++dev
->stats
.tx_dropped
;
614 dev_kfree_skb_any(skb
);
616 spin_unlock_irqrestore(&priv
->lock
, flags
);
617 ipoib_neigh_put(neigh
);
620 static void unicast_arp_send(struct sk_buff
*skb
, struct net_device
*dev
,
623 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
624 struct ipoib_path
*path
;
627 spin_lock_irqsave(&priv
->lock
, flags
);
629 path
= __path_find(dev
, cb
->hwaddr
+ 4);
630 if (!path
|| !path
->valid
) {
634 path
= path_rec_create(dev
, cb
->hwaddr
+ 4);
638 __skb_queue_tail(&path
->queue
, skb
);
640 if (!path
->query
&& path_rec_start(dev
, path
)) {
641 spin_unlock_irqrestore(&priv
->lock
, flags
);
643 path_free(dev
, path
);
646 __path_add(dev
, path
);
648 ++dev
->stats
.tx_dropped
;
649 dev_kfree_skb_any(skb
);
652 spin_unlock_irqrestore(&priv
->lock
, flags
);
657 ipoib_dbg(priv
, "Send unicast ARP to %04x\n",
658 be16_to_cpu(path
->pathrec
.dlid
));
660 spin_unlock_irqrestore(&priv
->lock
, flags
);
661 ipoib_send(dev
, skb
, path
->ah
, IPOIB_QPN(cb
->hwaddr
));
663 } else if ((path
->query
|| !path_rec_start(dev
, path
)) &&
664 skb_queue_len(&path
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
665 __skb_queue_tail(&path
->queue
, skb
);
667 ++dev
->stats
.tx_dropped
;
668 dev_kfree_skb_any(skb
);
671 spin_unlock_irqrestore(&priv
->lock
, flags
);
674 static int ipoib_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
676 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
677 struct ipoib_neigh
*neigh
;
678 struct ipoib_cb
*cb
= (struct ipoib_cb
*) skb
->cb
;
679 struct ipoib_header
*header
;
682 header
= (struct ipoib_header
*) skb
->data
;
684 if (unlikely(cb
->hwaddr
[4] == 0xff)) {
685 /* multicast, arrange "if" according to probability */
686 if ((header
->proto
!= htons(ETH_P_IP
)) &&
687 (header
->proto
!= htons(ETH_P_IPV6
)) &&
688 (header
->proto
!= htons(ETH_P_ARP
)) &&
689 (header
->proto
!= htons(ETH_P_RARP
))) {
690 /* ethertype not supported by IPoIB */
691 ++dev
->stats
.tx_dropped
;
692 dev_kfree_skb_any(skb
);
695 /* Add in the P_Key for multicast*/
696 cb
->hwaddr
[8] = (priv
->pkey
>> 8) & 0xff;
697 cb
->hwaddr
[9] = priv
->pkey
& 0xff;
699 neigh
= ipoib_neigh_get(dev
, cb
->hwaddr
);
701 goto send_using_neigh
;
702 ipoib_mcast_send(dev
, cb
->hwaddr
, skb
);
706 /* unicast, arrange "switch" according to probability */
707 switch (header
->proto
) {
708 case htons(ETH_P_IP
):
709 case htons(ETH_P_IPV6
):
710 neigh
= ipoib_neigh_get(dev
, cb
->hwaddr
);
711 if (unlikely(!neigh
)) {
712 neigh_add_path(skb
, cb
->hwaddr
, dev
);
716 case htons(ETH_P_ARP
):
717 case htons(ETH_P_RARP
):
718 /* for unicast ARP and RARP should always perform path find */
719 unicast_arp_send(skb
, dev
, cb
);
722 /* ethertype not supported by IPoIB */
723 ++dev
->stats
.tx_dropped
;
724 dev_kfree_skb_any(skb
);
729 /* note we now hold a ref to neigh */
730 if (ipoib_cm_get(neigh
)) {
731 if (ipoib_cm_up(neigh
)) {
732 ipoib_cm_send(dev
, skb
, ipoib_cm_get(neigh
));
735 } else if (neigh
->ah
) {
736 ipoib_send(dev
, skb
, neigh
->ah
, IPOIB_QPN(cb
->hwaddr
));
740 if (skb_queue_len(&neigh
->queue
) < IPOIB_MAX_PATH_REC_QUEUE
) {
741 spin_lock_irqsave(&priv
->lock
, flags
);
742 __skb_queue_tail(&neigh
->queue
, skb
);
743 spin_unlock_irqrestore(&priv
->lock
, flags
);
745 ++dev
->stats
.tx_dropped
;
746 dev_kfree_skb_any(skb
);
750 ipoib_neigh_put(neigh
);
755 static void ipoib_timeout(struct net_device
*dev
)
757 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
759 ipoib_warn(priv
, "transmit timeout: latency %d msecs\n",
760 jiffies_to_msecs(jiffies
- dev
->trans_start
));
761 ipoib_warn(priv
, "queue stopped %d, tx_head %u, tx_tail %u\n",
762 netif_queue_stopped(dev
),
763 priv
->tx_head
, priv
->tx_tail
);
764 /* XXX reset QP, etc. */
767 static int ipoib_hard_header(struct sk_buff
*skb
,
768 struct net_device
*dev
,
770 const void *daddr
, const void *saddr
, unsigned len
)
772 struct ipoib_header
*header
;
773 struct ipoib_cb
*cb
= (struct ipoib_cb
*) skb
->cb
;
775 header
= (struct ipoib_header
*) skb_push(skb
, sizeof *header
);
777 header
->proto
= htons(type
);
778 header
->reserved
= 0;
781 * we don't rely on dst_entry structure, always stuff the
782 * destination address into skb->cb so we can figure out where
783 * to send the packet later.
785 memcpy(cb
->hwaddr
, daddr
, INFINIBAND_ALEN
);
790 static void ipoib_set_mcast_list(struct net_device
*dev
)
792 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
794 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
795 ipoib_dbg(priv
, "IPOIB_FLAG_OPER_UP not set");
799 queue_work(ipoib_workqueue
, &priv
->restart_task
);
802 static u32
ipoib_addr_hash(struct ipoib_neigh_hash
*htbl
, u8
*daddr
)
805 * Use only the address parts that contributes to spreading
806 * The subnet prefix is not used as one can not connect to
807 * same remote port (GUID) using the same remote QPN via two
810 /* qpn octets[1:4) & port GUID octets[12:20) */
811 u32
*daddr_32
= (u32
*) daddr
;
814 hv
= jhash_3words(daddr_32
[3], daddr_32
[4], 0xFFFFFF & daddr_32
[0], 0);
815 return hv
& htbl
->mask
;
818 struct ipoib_neigh
*ipoib_neigh_get(struct net_device
*dev
, u8
*daddr
)
820 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
821 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
822 struct ipoib_neigh_hash
*htbl
;
823 struct ipoib_neigh
*neigh
= NULL
;
828 htbl
= rcu_dereference_bh(ntbl
->htbl
);
833 hash_val
= ipoib_addr_hash(htbl
, daddr
);
834 for (neigh
= rcu_dereference_bh(htbl
->buckets
[hash_val
]);
836 neigh
= rcu_dereference_bh(neigh
->hnext
)) {
837 if (memcmp(daddr
, neigh
->daddr
, INFINIBAND_ALEN
) == 0) {
838 /* found, take one ref on behalf of the caller */
839 if (!atomic_inc_not_zero(&neigh
->refcnt
)) {
844 neigh
->alive
= jiffies
;
850 rcu_read_unlock_bh();
854 static void __ipoib_reap_neigh(struct ipoib_dev_priv
*priv
)
856 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
857 struct ipoib_neigh_hash
*htbl
;
858 unsigned long neigh_obsolete
;
863 if (test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
866 spin_lock_irqsave(&priv
->lock
, flags
);
868 htbl
= rcu_dereference_protected(ntbl
->htbl
,
869 lockdep_is_held(&priv
->lock
));
874 /* neigh is obsolete if it was idle for two GC periods */
875 dt
= 2 * arp_tbl
.gc_interval
;
876 neigh_obsolete
= jiffies
- dt
;
877 /* handle possible race condition */
878 if (test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
881 for (i
= 0; i
< htbl
->size
; i
++) {
882 struct ipoib_neigh
*neigh
;
883 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
885 while ((neigh
= rcu_dereference_protected(*np
,
886 lockdep_is_held(&priv
->lock
))) != NULL
) {
887 /* was the neigh idle for two GC periods */
888 if (time_after(neigh_obsolete
, neigh
->alive
)) {
889 rcu_assign_pointer(*np
,
890 rcu_dereference_protected(neigh
->hnext
,
891 lockdep_is_held(&priv
->lock
)));
892 /* remove from path/mc list */
893 list_del(&neigh
->list
);
894 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
903 spin_unlock_irqrestore(&priv
->lock
, flags
);
906 static void ipoib_reap_neigh(struct work_struct
*work
)
908 struct ipoib_dev_priv
*priv
=
909 container_of(work
, struct ipoib_dev_priv
, neigh_reap_task
.work
);
911 __ipoib_reap_neigh(priv
);
913 if (!test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
914 queue_delayed_work(ipoib_workqueue
, &priv
->neigh_reap_task
,
915 arp_tbl
.gc_interval
);
919 static struct ipoib_neigh
*ipoib_neigh_ctor(u8
*daddr
,
920 struct net_device
*dev
)
922 struct ipoib_neigh
*neigh
;
924 neigh
= kzalloc(sizeof *neigh
, GFP_ATOMIC
);
929 memcpy(&neigh
->daddr
, daddr
, sizeof(neigh
->daddr
));
930 skb_queue_head_init(&neigh
->queue
);
931 INIT_LIST_HEAD(&neigh
->list
);
932 ipoib_cm_set(neigh
, NULL
);
933 /* one ref on behalf of the caller */
934 atomic_set(&neigh
->refcnt
, 1);
939 struct ipoib_neigh
*ipoib_neigh_alloc(u8
*daddr
,
940 struct net_device
*dev
)
942 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
943 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
944 struct ipoib_neigh_hash
*htbl
;
945 struct ipoib_neigh
*neigh
;
948 htbl
= rcu_dereference_protected(ntbl
->htbl
,
949 lockdep_is_held(&priv
->lock
));
955 /* need to add a new neigh, but maybe some other thread succeeded?
956 * recalc hash, maybe hash resize took place so we do a search
958 hash_val
= ipoib_addr_hash(htbl
, daddr
);
959 for (neigh
= rcu_dereference_protected(htbl
->buckets
[hash_val
],
960 lockdep_is_held(&priv
->lock
));
962 neigh
= rcu_dereference_protected(neigh
->hnext
,
963 lockdep_is_held(&priv
->lock
))) {
964 if (memcmp(daddr
, neigh
->daddr
, INFINIBAND_ALEN
) == 0) {
965 /* found, take one ref on behalf of the caller */
966 if (!atomic_inc_not_zero(&neigh
->refcnt
)) {
971 neigh
->alive
= jiffies
;
976 neigh
= ipoib_neigh_ctor(daddr
, dev
);
980 /* one ref on behalf of the hash table */
981 atomic_inc(&neigh
->refcnt
);
982 neigh
->alive
= jiffies
;
984 rcu_assign_pointer(neigh
->hnext
,
985 rcu_dereference_protected(htbl
->buckets
[hash_val
],
986 lockdep_is_held(&priv
->lock
)));
987 rcu_assign_pointer(htbl
->buckets
[hash_val
], neigh
);
988 atomic_inc(&ntbl
->entries
);
995 void ipoib_neigh_dtor(struct ipoib_neigh
*neigh
)
997 /* neigh reference count was dropprd to zero */
998 struct net_device
*dev
= neigh
->dev
;
999 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1000 struct sk_buff
*skb
;
1002 ipoib_put_ah(neigh
->ah
);
1003 while ((skb
= __skb_dequeue(&neigh
->queue
))) {
1004 ++dev
->stats
.tx_dropped
;
1005 dev_kfree_skb_any(skb
);
1007 if (ipoib_cm_get(neigh
))
1008 ipoib_cm_destroy_tx(ipoib_cm_get(neigh
));
1009 ipoib_dbg(netdev_priv(dev
),
1010 "neigh free for %06x %pI6\n",
1011 IPOIB_QPN(neigh
->daddr
),
1014 if (atomic_dec_and_test(&priv
->ntbl
.entries
)) {
1015 if (test_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
))
1016 complete(&priv
->ntbl
.flushed
);
1020 static void ipoib_neigh_reclaim(struct rcu_head
*rp
)
1022 /* Called as a result of removal from hash table */
1023 struct ipoib_neigh
*neigh
= container_of(rp
, struct ipoib_neigh
, rcu
);
1024 /* note TX context may hold another ref */
1025 ipoib_neigh_put(neigh
);
1028 void ipoib_neigh_free(struct ipoib_neigh
*neigh
)
1030 struct net_device
*dev
= neigh
->dev
;
1031 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1032 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1033 struct ipoib_neigh_hash
*htbl
;
1034 struct ipoib_neigh __rcu
**np
;
1035 struct ipoib_neigh
*n
;
1038 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1039 lockdep_is_held(&priv
->lock
));
1043 hash_val
= ipoib_addr_hash(htbl
, neigh
->daddr
);
1044 np
= &htbl
->buckets
[hash_val
];
1045 for (n
= rcu_dereference_protected(*np
,
1046 lockdep_is_held(&priv
->lock
));
1048 n
= rcu_dereference_protected(*np
,
1049 lockdep_is_held(&priv
->lock
))) {
1052 rcu_assign_pointer(*np
,
1053 rcu_dereference_protected(neigh
->hnext
,
1054 lockdep_is_held(&priv
->lock
)));
1055 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1063 static int ipoib_neigh_hash_init(struct ipoib_dev_priv
*priv
)
1065 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1066 struct ipoib_neigh_hash
*htbl
;
1067 struct ipoib_neigh
**buckets
;
1070 clear_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1072 htbl
= kzalloc(sizeof(*htbl
), GFP_KERNEL
);
1075 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1076 size
= roundup_pow_of_two(arp_tbl
.gc_thresh3
);
1077 buckets
= kzalloc(size
* sizeof(*buckets
), GFP_KERNEL
);
1083 htbl
->mask
= (size
- 1);
1084 htbl
->buckets
= buckets
;
1087 atomic_set(&ntbl
->entries
, 0);
1089 /* start garbage collection */
1090 clear_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1091 queue_delayed_work(ipoib_workqueue
, &priv
->neigh_reap_task
,
1092 arp_tbl
.gc_interval
);
1097 static void neigh_hash_free_rcu(struct rcu_head
*head
)
1099 struct ipoib_neigh_hash
*htbl
= container_of(head
,
1100 struct ipoib_neigh_hash
,
1102 struct ipoib_neigh __rcu
**buckets
= htbl
->buckets
;
1103 struct ipoib_neigh_table
*ntbl
= htbl
->ntbl
;
1107 complete(&ntbl
->deleted
);
1110 void ipoib_del_neighs_by_gid(struct net_device
*dev
, u8
*gid
)
1112 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1113 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1114 struct ipoib_neigh_hash
*htbl
;
1115 unsigned long flags
;
1118 /* remove all neigh connected to a given path or mcast */
1119 spin_lock_irqsave(&priv
->lock
, flags
);
1121 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1122 lockdep_is_held(&priv
->lock
));
1127 for (i
= 0; i
< htbl
->size
; i
++) {
1128 struct ipoib_neigh
*neigh
;
1129 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
1131 while ((neigh
= rcu_dereference_protected(*np
,
1132 lockdep_is_held(&priv
->lock
))) != NULL
) {
1133 /* delete neighs belong to this parent */
1134 if (!memcmp(gid
, neigh
->daddr
+ 4, sizeof (union ib_gid
))) {
1135 rcu_assign_pointer(*np
,
1136 rcu_dereference_protected(neigh
->hnext
,
1137 lockdep_is_held(&priv
->lock
)));
1138 /* remove from parent list */
1139 list_del(&neigh
->list
);
1140 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1148 spin_unlock_irqrestore(&priv
->lock
, flags
);
1151 static void ipoib_flush_neighs(struct ipoib_dev_priv
*priv
)
1153 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1154 struct ipoib_neigh_hash
*htbl
;
1155 unsigned long flags
;
1156 int i
, wait_flushed
= 0;
1158 init_completion(&priv
->ntbl
.flushed
);
1160 spin_lock_irqsave(&priv
->lock
, flags
);
1162 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1163 lockdep_is_held(&priv
->lock
));
1167 wait_flushed
= atomic_read(&priv
->ntbl
.entries
);
1171 for (i
= 0; i
< htbl
->size
; i
++) {
1172 struct ipoib_neigh
*neigh
;
1173 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
1175 while ((neigh
= rcu_dereference_protected(*np
,
1176 lockdep_is_held(&priv
->lock
))) != NULL
) {
1177 rcu_assign_pointer(*np
,
1178 rcu_dereference_protected(neigh
->hnext
,
1179 lockdep_is_held(&priv
->lock
)));
1180 /* remove from path/mc list */
1181 list_del(&neigh
->list
);
1182 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1187 rcu_assign_pointer(ntbl
->htbl
, NULL
);
1188 call_rcu(&htbl
->rcu
, neigh_hash_free_rcu
);
1191 spin_unlock_irqrestore(&priv
->lock
, flags
);
1193 wait_for_completion(&priv
->ntbl
.flushed
);
1196 static void ipoib_neigh_hash_uninit(struct net_device
*dev
)
1198 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1201 ipoib_dbg(priv
, "ipoib_neigh_hash_uninit\n");
1202 init_completion(&priv
->ntbl
.deleted
);
1203 set_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1205 /* Stop GC if called at init fail need to cancel work */
1206 stopped
= test_and_set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1208 cancel_delayed_work(&priv
->neigh_reap_task
);
1210 ipoib_flush_neighs(priv
);
1212 wait_for_completion(&priv
->ntbl
.deleted
);
1216 int ipoib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
1218 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1220 if (ipoib_neigh_hash_init(priv
) < 0)
1222 /* Allocate RX/TX "rings" to hold queued skbs */
1223 priv
->rx_ring
= kzalloc(ipoib_recvq_size
* sizeof *priv
->rx_ring
,
1225 if (!priv
->rx_ring
) {
1226 printk(KERN_WARNING
"%s: failed to allocate RX ring (%d entries)\n",
1227 ca
->name
, ipoib_recvq_size
);
1228 goto out_neigh_hash_cleanup
;
1231 priv
->tx_ring
= vzalloc(ipoib_sendq_size
* sizeof *priv
->tx_ring
);
1232 if (!priv
->tx_ring
) {
1233 printk(KERN_WARNING
"%s: failed to allocate TX ring (%d entries)\n",
1234 ca
->name
, ipoib_sendq_size
);
1235 goto out_rx_ring_cleanup
;
1238 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
1240 if (ipoib_ib_dev_init(dev
, ca
, port
))
1241 goto out_tx_ring_cleanup
;
1245 out_tx_ring_cleanup
:
1246 vfree(priv
->tx_ring
);
1248 out_rx_ring_cleanup
:
1249 kfree(priv
->rx_ring
);
1251 out_neigh_hash_cleanup
:
1252 ipoib_neigh_hash_uninit(dev
);
1257 void ipoib_dev_cleanup(struct net_device
*dev
)
1259 struct ipoib_dev_priv
*priv
= netdev_priv(dev
), *cpriv
, *tcpriv
;
1261 ipoib_delete_debug_files(dev
);
1263 /* Delete any child interfaces first */
1264 list_for_each_entry_safe(cpriv
, tcpriv
, &priv
->child_intfs
, list
) {
1265 /* Stop GC on child */
1266 set_bit(IPOIB_STOP_NEIGH_GC
, &cpriv
->flags
);
1267 cancel_delayed_work(&cpriv
->neigh_reap_task
);
1268 unregister_netdev(cpriv
->dev
);
1269 ipoib_dev_cleanup(cpriv
->dev
);
1270 free_netdev(cpriv
->dev
);
1273 ipoib_ib_dev_cleanup(dev
);
1275 kfree(priv
->rx_ring
);
1276 vfree(priv
->tx_ring
);
1278 priv
->rx_ring
= NULL
;
1279 priv
->tx_ring
= NULL
;
1281 ipoib_neigh_hash_uninit(dev
);
1284 static const struct header_ops ipoib_header_ops
= {
1285 .create
= ipoib_hard_header
,
1288 static const struct net_device_ops ipoib_netdev_ops
= {
1289 .ndo_open
= ipoib_open
,
1290 .ndo_stop
= ipoib_stop
,
1291 .ndo_change_mtu
= ipoib_change_mtu
,
1292 .ndo_fix_features
= ipoib_fix_features
,
1293 .ndo_start_xmit
= ipoib_start_xmit
,
1294 .ndo_tx_timeout
= ipoib_timeout
,
1295 .ndo_set_rx_mode
= ipoib_set_mcast_list
,
1298 static void ipoib_setup(struct net_device
*dev
)
1300 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1302 dev
->netdev_ops
= &ipoib_netdev_ops
;
1303 dev
->header_ops
= &ipoib_header_ops
;
1305 ipoib_set_ethtool_ops(dev
);
1307 netif_napi_add(dev
, &priv
->napi
, ipoib_poll
, 100);
1309 dev
->watchdog_timeo
= HZ
;
1311 dev
->flags
|= IFF_BROADCAST
| IFF_MULTICAST
;
1313 dev
->hard_header_len
= IPOIB_ENCAP_LEN
;
1314 dev
->addr_len
= INFINIBAND_ALEN
;
1315 dev
->type
= ARPHRD_INFINIBAND
;
1316 dev
->tx_queue_len
= ipoib_sendq_size
* 2;
1317 dev
->features
= (NETIF_F_VLAN_CHALLENGED
|
1319 dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
1321 memcpy(dev
->broadcast
, ipv4_bcast_addr
, INFINIBAND_ALEN
);
1323 netif_carrier_off(dev
);
1327 spin_lock_init(&priv
->lock
);
1329 mutex_init(&priv
->vlan_mutex
);
1331 INIT_LIST_HEAD(&priv
->path_list
);
1332 INIT_LIST_HEAD(&priv
->child_intfs
);
1333 INIT_LIST_HEAD(&priv
->dead_ahs
);
1334 INIT_LIST_HEAD(&priv
->multicast_list
);
1336 INIT_DELAYED_WORK(&priv
->pkey_poll_task
, ipoib_pkey_poll
);
1337 INIT_DELAYED_WORK(&priv
->mcast_task
, ipoib_mcast_join_task
);
1338 INIT_WORK(&priv
->carrier_on_task
, ipoib_mcast_carrier_on_task
);
1339 INIT_WORK(&priv
->flush_light
, ipoib_ib_dev_flush_light
);
1340 INIT_WORK(&priv
->flush_normal
, ipoib_ib_dev_flush_normal
);
1341 INIT_WORK(&priv
->flush_heavy
, ipoib_ib_dev_flush_heavy
);
1342 INIT_WORK(&priv
->restart_task
, ipoib_mcast_restart_task
);
1343 INIT_DELAYED_WORK(&priv
->ah_reap_task
, ipoib_reap_ah
);
1344 INIT_DELAYED_WORK(&priv
->neigh_reap_task
, ipoib_reap_neigh
);
1347 struct ipoib_dev_priv
*ipoib_intf_alloc(const char *name
)
1349 struct net_device
*dev
;
1351 dev
= alloc_netdev((int) sizeof (struct ipoib_dev_priv
), name
,
1356 return netdev_priv(dev
);
1359 static ssize_t
show_pkey(struct device
*dev
,
1360 struct device_attribute
*attr
, char *buf
)
1362 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1364 return sprintf(buf
, "0x%04x\n", priv
->pkey
);
1366 static DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
1368 static ssize_t
show_umcast(struct device
*dev
,
1369 struct device_attribute
*attr
, char *buf
)
1371 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1373 return sprintf(buf
, "%d\n", test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
));
1376 static ssize_t
set_umcast(struct device
*dev
,
1377 struct device_attribute
*attr
,
1378 const char *buf
, size_t count
)
1380 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1381 unsigned long umcast_val
= simple_strtoul(buf
, NULL
, 0);
1383 if (umcast_val
> 0) {
1384 set_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
);
1385 ipoib_warn(priv
, "ignoring multicast groups joined directly "
1388 clear_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
);
1392 static DEVICE_ATTR(umcast
, S_IWUSR
| S_IRUGO
, show_umcast
, set_umcast
);
1394 int ipoib_add_umcast_attr(struct net_device
*dev
)
1396 return device_create_file(&dev
->dev
, &dev_attr_umcast
);
1399 static ssize_t
create_child(struct device
*dev
,
1400 struct device_attribute
*attr
,
1401 const char *buf
, size_t count
)
1406 if (sscanf(buf
, "%i", &pkey
) != 1)
1409 if (pkey
< 0 || pkey
> 0xffff)
1413 * Set the full membership bit, so that we join the right
1414 * broadcast group, etc.
1418 ret
= ipoib_vlan_add(to_net_dev(dev
), pkey
);
1420 return ret
? ret
: count
;
1422 static DEVICE_ATTR(create_child
, S_IWUSR
, NULL
, create_child
);
1424 static ssize_t
delete_child(struct device
*dev
,
1425 struct device_attribute
*attr
,
1426 const char *buf
, size_t count
)
1431 if (sscanf(buf
, "%i", &pkey
) != 1)
1434 if (pkey
< 0 || pkey
> 0xffff)
1437 ret
= ipoib_vlan_delete(to_net_dev(dev
), pkey
);
1439 return ret
? ret
: count
;
1442 static DEVICE_ATTR(delete_child
, S_IWUSR
, NULL
, delete_child
);
1444 int ipoib_add_pkey_attr(struct net_device
*dev
)
1446 return device_create_file(&dev
->dev
, &dev_attr_pkey
);
1449 int ipoib_set_dev_features(struct ipoib_dev_priv
*priv
, struct ib_device
*hca
)
1451 struct ib_device_attr
*device_attr
;
1452 int result
= -ENOMEM
;
1454 device_attr
= kmalloc(sizeof *device_attr
, GFP_KERNEL
);
1456 printk(KERN_WARNING
"%s: allocation of %zu bytes failed\n",
1457 hca
->name
, sizeof *device_attr
);
1461 result
= ib_query_device(hca
, device_attr
);
1463 printk(KERN_WARNING
"%s: ib_query_device failed (ret = %d)\n",
1468 priv
->hca_caps
= device_attr
->device_cap_flags
;
1472 if (priv
->hca_caps
& IB_DEVICE_UD_IP_CSUM
) {
1473 priv
->dev
->hw_features
= NETIF_F_SG
|
1474 NETIF_F_IP_CSUM
| NETIF_F_RXCSUM
;
1476 if (priv
->hca_caps
& IB_DEVICE_UD_TSO
)
1477 priv
->dev
->hw_features
|= NETIF_F_TSO
;
1479 priv
->dev
->features
|= priv
->dev
->hw_features
;
1485 static struct net_device
*ipoib_add_port(const char *format
,
1486 struct ib_device
*hca
, u8 port
)
1488 struct ipoib_dev_priv
*priv
;
1489 struct ib_port_attr attr
;
1490 int result
= -ENOMEM
;
1492 priv
= ipoib_intf_alloc(format
);
1494 goto alloc_mem_failed
;
1496 SET_NETDEV_DEV(priv
->dev
, hca
->dma_device
);
1497 priv
->dev
->dev_id
= port
- 1;
1499 if (!ib_query_port(hca
, port
, &attr
))
1500 priv
->max_ib_mtu
= ib_mtu_enum_to_int(attr
.max_mtu
);
1502 printk(KERN_WARNING
"%s: ib_query_port %d failed\n",
1504 goto device_init_failed
;
1507 /* MTU will be reset when mcast join happens */
1508 priv
->dev
->mtu
= IPOIB_UD_MTU(priv
->max_ib_mtu
);
1509 priv
->mcast_mtu
= priv
->admin_mtu
= priv
->dev
->mtu
;
1511 priv
->dev
->neigh_priv_len
= sizeof(struct ipoib_neigh
);
1513 result
= ib_query_pkey(hca
, port
, 0, &priv
->pkey
);
1515 printk(KERN_WARNING
"%s: ib_query_pkey port %d failed (ret = %d)\n",
1516 hca
->name
, port
, result
);
1517 goto device_init_failed
;
1520 if (ipoib_set_dev_features(priv
, hca
))
1521 goto device_init_failed
;
1524 * Set the full membership bit, so that we join the right
1525 * broadcast group, etc.
1527 priv
->pkey
|= 0x8000;
1529 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
1530 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
1532 result
= ib_query_gid(hca
, port
, 0, &priv
->local_gid
);
1534 printk(KERN_WARNING
"%s: ib_query_gid port %d failed (ret = %d)\n",
1535 hca
->name
, port
, result
);
1536 goto device_init_failed
;
1538 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
1540 result
= ipoib_dev_init(priv
->dev
, hca
, port
);
1542 printk(KERN_WARNING
"%s: failed to initialize port %d (ret = %d)\n",
1543 hca
->name
, port
, result
);
1544 goto device_init_failed
;
1547 INIT_IB_EVENT_HANDLER(&priv
->event_handler
,
1548 priv
->ca
, ipoib_event
);
1549 result
= ib_register_event_handler(&priv
->event_handler
);
1551 printk(KERN_WARNING
"%s: ib_register_event_handler failed for "
1552 "port %d (ret = %d)\n",
1553 hca
->name
, port
, result
);
1557 result
= register_netdev(priv
->dev
);
1559 printk(KERN_WARNING
"%s: couldn't register ipoib port %d; error %d\n",
1560 hca
->name
, port
, result
);
1561 goto register_failed
;
1564 ipoib_create_debug_files(priv
->dev
);
1566 if (ipoib_cm_add_mode_attr(priv
->dev
))
1568 if (ipoib_add_pkey_attr(priv
->dev
))
1570 if (ipoib_add_umcast_attr(priv
->dev
))
1572 if (device_create_file(&priv
->dev
->dev
, &dev_attr_create_child
))
1574 if (device_create_file(&priv
->dev
->dev
, &dev_attr_delete_child
))
1580 ipoib_delete_debug_files(priv
->dev
);
1581 unregister_netdev(priv
->dev
);
1584 ib_unregister_event_handler(&priv
->event_handler
);
1585 /* Stop GC if started before flush */
1586 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1587 cancel_delayed_work(&priv
->neigh_reap_task
);
1588 flush_workqueue(ipoib_workqueue
);
1591 ipoib_dev_cleanup(priv
->dev
);
1594 free_netdev(priv
->dev
);
1597 return ERR_PTR(result
);
1600 static void ipoib_add_one(struct ib_device
*device
)
1602 struct list_head
*dev_list
;
1603 struct net_device
*dev
;
1604 struct ipoib_dev_priv
*priv
;
1607 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1610 dev_list
= kmalloc(sizeof *dev_list
, GFP_KERNEL
);
1614 INIT_LIST_HEAD(dev_list
);
1616 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
1621 e
= device
->phys_port_cnt
;
1624 for (p
= s
; p
<= e
; ++p
) {
1625 if (rdma_port_get_link_layer(device
, p
) != IB_LINK_LAYER_INFINIBAND
)
1627 dev
= ipoib_add_port("ib%d", device
, p
);
1629 priv
= netdev_priv(dev
);
1630 list_add_tail(&priv
->list
, dev_list
);
1634 ib_set_client_data(device
, &ipoib_client
, dev_list
);
1637 static void ipoib_remove_one(struct ib_device
*device
)
1639 struct ipoib_dev_priv
*priv
, *tmp
;
1640 struct list_head
*dev_list
;
1642 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1645 dev_list
= ib_get_client_data(device
, &ipoib_client
);
1647 list_for_each_entry_safe(priv
, tmp
, dev_list
, list
) {
1648 ib_unregister_event_handler(&priv
->event_handler
);
1651 dev_change_flags(priv
->dev
, priv
->dev
->flags
& ~IFF_UP
);
1655 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1656 cancel_delayed_work(&priv
->neigh_reap_task
);
1657 flush_workqueue(ipoib_workqueue
);
1659 unregister_netdev(priv
->dev
);
1660 ipoib_dev_cleanup(priv
->dev
);
1661 free_netdev(priv
->dev
);
1667 static int __init
ipoib_init_module(void)
1671 ipoib_recvq_size
= roundup_pow_of_two(ipoib_recvq_size
);
1672 ipoib_recvq_size
= min(ipoib_recvq_size
, IPOIB_MAX_QUEUE_SIZE
);
1673 ipoib_recvq_size
= max(ipoib_recvq_size
, IPOIB_MIN_QUEUE_SIZE
);
1675 ipoib_sendq_size
= roundup_pow_of_two(ipoib_sendq_size
);
1676 ipoib_sendq_size
= min(ipoib_sendq_size
, IPOIB_MAX_QUEUE_SIZE
);
1677 ipoib_sendq_size
= max3(ipoib_sendq_size
, 2 * MAX_SEND_CQE
, IPOIB_MIN_QUEUE_SIZE
);
1678 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1679 ipoib_max_conn_qp
= min(ipoib_max_conn_qp
, IPOIB_CM_MAX_CONN_QP
);
1683 * When copying small received packets, we only copy from the
1684 * linear data part of the SKB, so we rely on this condition.
1686 BUILD_BUG_ON(IPOIB_CM_COPYBREAK
> IPOIB_CM_HEAD_SIZE
);
1688 ret
= ipoib_register_debugfs();
1693 * We create our own workqueue mainly because we want to be
1694 * able to flush it when devices are being removed. We can't
1695 * use schedule_work()/flush_scheduled_work() because both
1696 * unregister_netdev() and linkwatch_event take the rtnl lock,
1697 * so flush_scheduled_work() can deadlock during device
1700 ipoib_workqueue
= create_singlethread_workqueue("ipoib");
1701 if (!ipoib_workqueue
) {
1706 ib_sa_register_client(&ipoib_sa_client
);
1708 ret
= ib_register_client(&ipoib_client
);
1715 ib_sa_unregister_client(&ipoib_sa_client
);
1716 destroy_workqueue(ipoib_workqueue
);
1719 ipoib_unregister_debugfs();
1724 static void __exit
ipoib_cleanup_module(void)
1726 ib_unregister_client(&ipoib_client
);
1727 ib_sa_unregister_client(&ipoib_sa_client
);
1728 ipoib_unregister_debugfs();
1729 destroy_workqueue(ipoib_workqueue
);
1732 module_init(ipoib_init_module
);
1733 module_exit(ipoib_cleanup_module
);