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 neigh
= ipoib_neigh_alloc(daddr
, dev
);
551 ++dev
->stats
.tx_dropped
;
552 dev_kfree_skb_any(skb
);
556 spin_lock_irqsave(&priv
->lock
, flags
);
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 write_lock_bh(&ntbl
->rwlock
);
868 htbl
= rcu_dereference_protected(ntbl
->htbl
,
869 lockdep_is_held(&ntbl
->rwlock
));
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(&ntbl
->rwlock
))) != 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(&ntbl
->rwlock
)));
892 /* remove from path/mc list */
893 spin_lock_irqsave(&priv
->lock
, flags
);
894 list_del(&neigh
->list
);
895 spin_unlock_irqrestore(&priv
->lock
, flags
);
896 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
905 write_unlock_bh(&ntbl
->rwlock
);
908 static void ipoib_reap_neigh(struct work_struct
*work
)
910 struct ipoib_dev_priv
*priv
=
911 container_of(work
, struct ipoib_dev_priv
, neigh_reap_task
.work
);
913 __ipoib_reap_neigh(priv
);
915 if (!test_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
))
916 queue_delayed_work(ipoib_workqueue
, &priv
->neigh_reap_task
,
917 arp_tbl
.gc_interval
);
921 static struct ipoib_neigh
*ipoib_neigh_ctor(u8
*daddr
,
922 struct net_device
*dev
)
924 struct ipoib_neigh
*neigh
;
926 neigh
= kzalloc(sizeof *neigh
, GFP_ATOMIC
);
931 memcpy(&neigh
->daddr
, daddr
, sizeof(neigh
->daddr
));
932 skb_queue_head_init(&neigh
->queue
);
933 INIT_LIST_HEAD(&neigh
->list
);
934 ipoib_cm_set(neigh
, NULL
);
935 /* one ref on behalf of the caller */
936 atomic_set(&neigh
->refcnt
, 1);
941 struct ipoib_neigh
*ipoib_neigh_alloc(u8
*daddr
,
942 struct net_device
*dev
)
944 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
945 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
946 struct ipoib_neigh_hash
*htbl
;
947 struct ipoib_neigh
*neigh
;
950 write_lock_bh(&ntbl
->rwlock
);
952 htbl
= rcu_dereference_protected(ntbl
->htbl
,
953 lockdep_is_held(&ntbl
->rwlock
));
959 /* need to add a new neigh, but maybe some other thread succeeded?
960 * recalc hash, maybe hash resize took place so we do a search
962 hash_val
= ipoib_addr_hash(htbl
, daddr
);
963 for (neigh
= rcu_dereference_protected(htbl
->buckets
[hash_val
],
964 lockdep_is_held(&ntbl
->rwlock
));
966 neigh
= rcu_dereference_protected(neigh
->hnext
,
967 lockdep_is_held(&ntbl
->rwlock
))) {
968 if (memcmp(daddr
, neigh
->daddr
, INFINIBAND_ALEN
) == 0) {
969 /* found, take one ref on behalf of the caller */
970 if (!atomic_inc_not_zero(&neigh
->refcnt
)) {
975 neigh
->alive
= jiffies
;
980 neigh
= ipoib_neigh_ctor(daddr
, dev
);
984 /* one ref on behalf of the hash table */
985 atomic_inc(&neigh
->refcnt
);
986 neigh
->alive
= jiffies
;
988 rcu_assign_pointer(neigh
->hnext
,
989 rcu_dereference_protected(htbl
->buckets
[hash_val
],
990 lockdep_is_held(&ntbl
->rwlock
)));
991 rcu_assign_pointer(htbl
->buckets
[hash_val
], neigh
);
992 atomic_inc(&ntbl
->entries
);
995 write_unlock_bh(&ntbl
->rwlock
);
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 write_lock_bh(&ntbl
->rwlock
);
1045 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1046 lockdep_is_held(&ntbl
->rwlock
));
1050 hash_val
= ipoib_addr_hash(htbl
, neigh
->daddr
);
1051 np
= &htbl
->buckets
[hash_val
];
1052 for (n
= rcu_dereference_protected(*np
,
1053 lockdep_is_held(&ntbl
->rwlock
));
1055 n
= rcu_dereference_protected(*np
,
1056 lockdep_is_held(&ntbl
->rwlock
))) {
1059 rcu_assign_pointer(*np
,
1060 rcu_dereference_protected(neigh
->hnext
,
1061 lockdep_is_held(&ntbl
->rwlock
)));
1062 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1070 write_unlock_bh(&ntbl
->rwlock
);
1074 static int ipoib_neigh_hash_init(struct ipoib_dev_priv
*priv
)
1076 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1077 struct ipoib_neigh_hash
*htbl
;
1078 struct ipoib_neigh
**buckets
;
1081 clear_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1083 rwlock_init(&ntbl
->rwlock
);
1084 htbl
= kzalloc(sizeof(*htbl
), GFP_KERNEL
);
1087 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1088 size
= roundup_pow_of_two(arp_tbl
.gc_thresh3
);
1089 buckets
= kzalloc(size
* sizeof(*buckets
), GFP_KERNEL
);
1095 htbl
->mask
= (size
- 1);
1096 htbl
->buckets
= buckets
;
1098 atomic_set(&ntbl
->entries
, 0);
1100 /* start garbage collection */
1101 clear_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1102 queue_delayed_work(ipoib_workqueue
, &priv
->neigh_reap_task
,
1103 arp_tbl
.gc_interval
);
1108 static void neigh_hash_free_rcu(struct rcu_head
*head
)
1110 struct ipoib_neigh_hash
*htbl
= container_of(head
,
1111 struct ipoib_neigh_hash
,
1113 struct ipoib_neigh __rcu
**buckets
= htbl
->buckets
;
1119 void ipoib_del_neighs_by_gid(struct net_device
*dev
, u8
*gid
)
1121 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1122 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1123 struct ipoib_neigh_hash
*htbl
;
1124 unsigned long flags
;
1127 /* remove all neigh connected to a given path or mcast */
1128 write_lock_bh(&ntbl
->rwlock
);
1130 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1131 lockdep_is_held(&ntbl
->rwlock
));
1136 for (i
= 0; i
< htbl
->size
; i
++) {
1137 struct ipoib_neigh
*neigh
;
1138 struct ipoib_neigh __rcu
**np
= &htbl
->buckets
[i
];
1140 while ((neigh
= rcu_dereference_protected(*np
,
1141 lockdep_is_held(&ntbl
->rwlock
))) != NULL
) {
1142 /* delete neighs belong to this parent */
1143 if (!memcmp(gid
, neigh
->daddr
+ 4, sizeof (union ib_gid
))) {
1144 rcu_assign_pointer(*np
,
1145 rcu_dereference_protected(neigh
->hnext
,
1146 lockdep_is_held(&ntbl
->rwlock
)));
1147 /* remove from parent list */
1148 spin_lock_irqsave(&priv
->lock
, flags
);
1149 list_del(&neigh
->list
);
1150 spin_unlock_irqrestore(&priv
->lock
, flags
);
1151 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1159 write_unlock_bh(&ntbl
->rwlock
);
1162 static void ipoib_flush_neighs(struct ipoib_dev_priv
*priv
)
1164 struct ipoib_neigh_table
*ntbl
= &priv
->ntbl
;
1165 struct ipoib_neigh_hash
*htbl
;
1166 unsigned long flags
;
1169 write_lock_bh(&ntbl
->rwlock
);
1171 htbl
= rcu_dereference_protected(ntbl
->htbl
,
1172 lockdep_is_held(&ntbl
->rwlock
));
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(&ntbl
->rwlock
))) != NULL
) {
1182 rcu_assign_pointer(*np
,
1183 rcu_dereference_protected(neigh
->hnext
,
1184 lockdep_is_held(&ntbl
->rwlock
)));
1185 /* remove from path/mc list */
1186 spin_lock_irqsave(&priv
->lock
, flags
);
1187 list_del(&neigh
->list
);
1188 spin_unlock_irqrestore(&priv
->lock
, flags
);
1189 call_rcu(&neigh
->rcu
, ipoib_neigh_reclaim
);
1193 rcu_assign_pointer(ntbl
->htbl
, NULL
);
1194 call_rcu(&htbl
->rcu
, neigh_hash_free_rcu
);
1197 write_unlock_bh(&ntbl
->rwlock
);
1200 static void ipoib_neigh_hash_uninit(struct net_device
*dev
)
1202 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1205 ipoib_dbg(priv
, "ipoib_neigh_hash_uninit\n");
1206 init_completion(&priv
->ntbl
.flushed
);
1207 set_bit(IPOIB_NEIGH_TBL_FLUSH
, &priv
->flags
);
1209 /* Stop GC if called at init fail need to cancel work */
1210 stopped
= test_and_set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1212 cancel_delayed_work(&priv
->neigh_reap_task
);
1214 if (atomic_read(&priv
->ntbl
.entries
)) {
1215 ipoib_flush_neighs(priv
);
1216 wait_for_completion(&priv
->ntbl
.flushed
);
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
;
1266 ipoib_delete_debug_files(dev
);
1268 /* Delete any child interfaces first */
1269 list_for_each_entry_safe(cpriv
, tcpriv
, &priv
->child_intfs
, list
) {
1270 /* Stop GC on child */
1271 set_bit(IPOIB_STOP_NEIGH_GC
, &cpriv
->flags
);
1272 cancel_delayed_work(&cpriv
->neigh_reap_task
);
1273 unregister_netdev(cpriv
->dev
);
1274 ipoib_dev_cleanup(cpriv
->dev
);
1275 free_netdev(cpriv
->dev
);
1278 ipoib_ib_dev_cleanup(dev
);
1280 kfree(priv
->rx_ring
);
1281 vfree(priv
->tx_ring
);
1283 priv
->rx_ring
= NULL
;
1284 priv
->tx_ring
= NULL
;
1286 ipoib_neigh_hash_uninit(dev
);
1289 static const struct header_ops ipoib_header_ops
= {
1290 .create
= ipoib_hard_header
,
1293 static const struct net_device_ops ipoib_netdev_ops
= {
1294 .ndo_open
= ipoib_open
,
1295 .ndo_stop
= ipoib_stop
,
1296 .ndo_change_mtu
= ipoib_change_mtu
,
1297 .ndo_fix_features
= ipoib_fix_features
,
1298 .ndo_start_xmit
= ipoib_start_xmit
,
1299 .ndo_tx_timeout
= ipoib_timeout
,
1300 .ndo_set_rx_mode
= ipoib_set_mcast_list
,
1303 static void ipoib_setup(struct net_device
*dev
)
1305 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1307 dev
->netdev_ops
= &ipoib_netdev_ops
;
1308 dev
->header_ops
= &ipoib_header_ops
;
1310 ipoib_set_ethtool_ops(dev
);
1312 netif_napi_add(dev
, &priv
->napi
, ipoib_poll
, 100);
1314 dev
->watchdog_timeo
= HZ
;
1316 dev
->flags
|= IFF_BROADCAST
| IFF_MULTICAST
;
1318 dev
->hard_header_len
= IPOIB_ENCAP_LEN
;
1319 dev
->addr_len
= INFINIBAND_ALEN
;
1320 dev
->type
= ARPHRD_INFINIBAND
;
1321 dev
->tx_queue_len
= ipoib_sendq_size
* 2;
1322 dev
->features
= (NETIF_F_VLAN_CHALLENGED
|
1324 dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
1326 memcpy(dev
->broadcast
, ipv4_bcast_addr
, INFINIBAND_ALEN
);
1328 netif_carrier_off(dev
);
1332 spin_lock_init(&priv
->lock
);
1334 mutex_init(&priv
->vlan_mutex
);
1336 INIT_LIST_HEAD(&priv
->path_list
);
1337 INIT_LIST_HEAD(&priv
->child_intfs
);
1338 INIT_LIST_HEAD(&priv
->dead_ahs
);
1339 INIT_LIST_HEAD(&priv
->multicast_list
);
1341 INIT_DELAYED_WORK(&priv
->pkey_poll_task
, ipoib_pkey_poll
);
1342 INIT_DELAYED_WORK(&priv
->mcast_task
, ipoib_mcast_join_task
);
1343 INIT_WORK(&priv
->carrier_on_task
, ipoib_mcast_carrier_on_task
);
1344 INIT_WORK(&priv
->flush_light
, ipoib_ib_dev_flush_light
);
1345 INIT_WORK(&priv
->flush_normal
, ipoib_ib_dev_flush_normal
);
1346 INIT_WORK(&priv
->flush_heavy
, ipoib_ib_dev_flush_heavy
);
1347 INIT_WORK(&priv
->restart_task
, ipoib_mcast_restart_task
);
1348 INIT_DELAYED_WORK(&priv
->ah_reap_task
, ipoib_reap_ah
);
1349 INIT_DELAYED_WORK(&priv
->neigh_reap_task
, ipoib_reap_neigh
);
1352 struct ipoib_dev_priv
*ipoib_intf_alloc(const char *name
)
1354 struct net_device
*dev
;
1356 dev
= alloc_netdev((int) sizeof (struct ipoib_dev_priv
), name
,
1361 return netdev_priv(dev
);
1364 static ssize_t
show_pkey(struct device
*dev
,
1365 struct device_attribute
*attr
, char *buf
)
1367 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1369 return sprintf(buf
, "0x%04x\n", priv
->pkey
);
1371 static DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
1373 static ssize_t
show_umcast(struct device
*dev
,
1374 struct device_attribute
*attr
, char *buf
)
1376 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1378 return sprintf(buf
, "%d\n", test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
));
1381 static ssize_t
set_umcast(struct device
*dev
,
1382 struct device_attribute
*attr
,
1383 const char *buf
, size_t count
)
1385 struct ipoib_dev_priv
*priv
= netdev_priv(to_net_dev(dev
));
1386 unsigned long umcast_val
= simple_strtoul(buf
, NULL
, 0);
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
);
1397 static DEVICE_ATTR(umcast
, S_IWUSR
| S_IRUGO
, show_umcast
, set_umcast
);
1399 int ipoib_add_umcast_attr(struct net_device
*dev
)
1401 return device_create_file(&dev
->dev
, &dev_attr_umcast
);
1404 static ssize_t
create_child(struct device
*dev
,
1405 struct device_attribute
*attr
,
1406 const char *buf
, size_t count
)
1411 if (sscanf(buf
, "%i", &pkey
) != 1)
1414 if (pkey
< 0 || pkey
> 0xffff)
1418 * Set the full membership bit, so that we join the right
1419 * broadcast group, etc.
1423 ret
= ipoib_vlan_add(to_net_dev(dev
), pkey
);
1425 return ret
? ret
: count
;
1427 static DEVICE_ATTR(create_child
, S_IWUSR
, NULL
, create_child
);
1429 static ssize_t
delete_child(struct device
*dev
,
1430 struct device_attribute
*attr
,
1431 const char *buf
, size_t count
)
1436 if (sscanf(buf
, "%i", &pkey
) != 1)
1439 if (pkey
< 0 || pkey
> 0xffff)
1442 ret
= ipoib_vlan_delete(to_net_dev(dev
), pkey
);
1444 return ret
? ret
: count
;
1447 static DEVICE_ATTR(delete_child
, S_IWUSR
, NULL
, delete_child
);
1449 int ipoib_add_pkey_attr(struct net_device
*dev
)
1451 return device_create_file(&dev
->dev
, &dev_attr_pkey
);
1454 int ipoib_set_dev_features(struct ipoib_dev_priv
*priv
, struct ib_device
*hca
)
1456 struct ib_device_attr
*device_attr
;
1457 int result
= -ENOMEM
;
1459 device_attr
= kmalloc(sizeof *device_attr
, GFP_KERNEL
);
1461 printk(KERN_WARNING
"%s: allocation of %zu bytes failed\n",
1462 hca
->name
, sizeof *device_attr
);
1466 result
= ib_query_device(hca
, device_attr
);
1468 printk(KERN_WARNING
"%s: ib_query_device failed (ret = %d)\n",
1473 priv
->hca_caps
= device_attr
->device_cap_flags
;
1477 if (priv
->hca_caps
& IB_DEVICE_UD_IP_CSUM
) {
1478 priv
->dev
->hw_features
= NETIF_F_SG
|
1479 NETIF_F_IP_CSUM
| NETIF_F_RXCSUM
;
1481 if (priv
->hca_caps
& IB_DEVICE_UD_TSO
)
1482 priv
->dev
->hw_features
|= NETIF_F_TSO
;
1484 priv
->dev
->features
|= priv
->dev
->hw_features
;
1490 static struct net_device
*ipoib_add_port(const char *format
,
1491 struct ib_device
*hca
, u8 port
)
1493 struct ipoib_dev_priv
*priv
;
1494 struct ib_port_attr attr
;
1495 int result
= -ENOMEM
;
1497 priv
= ipoib_intf_alloc(format
);
1499 goto alloc_mem_failed
;
1501 SET_NETDEV_DEV(priv
->dev
, hca
->dma_device
);
1502 priv
->dev
->dev_id
= port
- 1;
1504 if (!ib_query_port(hca
, port
, &attr
))
1505 priv
->max_ib_mtu
= ib_mtu_enum_to_int(attr
.max_mtu
);
1507 printk(KERN_WARNING
"%s: ib_query_port %d failed\n",
1509 goto device_init_failed
;
1512 /* MTU will be reset when mcast join happens */
1513 priv
->dev
->mtu
= IPOIB_UD_MTU(priv
->max_ib_mtu
);
1514 priv
->mcast_mtu
= priv
->admin_mtu
= priv
->dev
->mtu
;
1516 priv
->dev
->neigh_priv_len
= sizeof(struct ipoib_neigh
);
1518 result
= ib_query_pkey(hca
, port
, 0, &priv
->pkey
);
1520 printk(KERN_WARNING
"%s: ib_query_pkey port %d failed (ret = %d)\n",
1521 hca
->name
, port
, result
);
1522 goto device_init_failed
;
1525 if (ipoib_set_dev_features(priv
, hca
))
1526 goto device_init_failed
;
1529 * Set the full membership bit, so that we join the right
1530 * broadcast group, etc.
1532 priv
->pkey
|= 0x8000;
1534 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
1535 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
1537 result
= ib_query_gid(hca
, port
, 0, &priv
->local_gid
);
1539 printk(KERN_WARNING
"%s: ib_query_gid port %d failed (ret = %d)\n",
1540 hca
->name
, port
, result
);
1541 goto device_init_failed
;
1543 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
1545 result
= ipoib_dev_init(priv
->dev
, hca
, port
);
1547 printk(KERN_WARNING
"%s: failed to initialize port %d (ret = %d)\n",
1548 hca
->name
, port
, result
);
1549 goto device_init_failed
;
1552 INIT_IB_EVENT_HANDLER(&priv
->event_handler
,
1553 priv
->ca
, ipoib_event
);
1554 result
= ib_register_event_handler(&priv
->event_handler
);
1556 printk(KERN_WARNING
"%s: ib_register_event_handler failed for "
1557 "port %d (ret = %d)\n",
1558 hca
->name
, port
, result
);
1562 result
= register_netdev(priv
->dev
);
1564 printk(KERN_WARNING
"%s: couldn't register ipoib port %d; error %d\n",
1565 hca
->name
, port
, result
);
1566 goto register_failed
;
1569 ipoib_create_debug_files(priv
->dev
);
1571 if (ipoib_cm_add_mode_attr(priv
->dev
))
1573 if (ipoib_add_pkey_attr(priv
->dev
))
1575 if (ipoib_add_umcast_attr(priv
->dev
))
1577 if (device_create_file(&priv
->dev
->dev
, &dev_attr_create_child
))
1579 if (device_create_file(&priv
->dev
->dev
, &dev_attr_delete_child
))
1585 ipoib_delete_debug_files(priv
->dev
);
1586 unregister_netdev(priv
->dev
);
1589 ib_unregister_event_handler(&priv
->event_handler
);
1590 /* Stop GC if started before flush */
1591 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1592 cancel_delayed_work(&priv
->neigh_reap_task
);
1593 flush_workqueue(ipoib_workqueue
);
1596 ipoib_dev_cleanup(priv
->dev
);
1599 free_netdev(priv
->dev
);
1602 return ERR_PTR(result
);
1605 static void ipoib_add_one(struct ib_device
*device
)
1607 struct list_head
*dev_list
;
1608 struct net_device
*dev
;
1609 struct ipoib_dev_priv
*priv
;
1612 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1615 dev_list
= kmalloc(sizeof *dev_list
, GFP_KERNEL
);
1619 INIT_LIST_HEAD(dev_list
);
1621 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
1626 e
= device
->phys_port_cnt
;
1629 for (p
= s
; p
<= e
; ++p
) {
1630 if (rdma_port_get_link_layer(device
, p
) != IB_LINK_LAYER_INFINIBAND
)
1632 dev
= ipoib_add_port("ib%d", device
, p
);
1634 priv
= netdev_priv(dev
);
1635 list_add_tail(&priv
->list
, dev_list
);
1639 ib_set_client_data(device
, &ipoib_client
, dev_list
);
1642 static void ipoib_remove_one(struct ib_device
*device
)
1644 struct ipoib_dev_priv
*priv
, *tmp
;
1645 struct list_head
*dev_list
;
1647 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
1650 dev_list
= ib_get_client_data(device
, &ipoib_client
);
1652 list_for_each_entry_safe(priv
, tmp
, dev_list
, list
) {
1653 ib_unregister_event_handler(&priv
->event_handler
);
1656 dev_change_flags(priv
->dev
, priv
->dev
->flags
& ~IFF_UP
);
1660 set_bit(IPOIB_STOP_NEIGH_GC
, &priv
->flags
);
1661 cancel_delayed_work(&priv
->neigh_reap_task
);
1662 flush_workqueue(ipoib_workqueue
);
1664 unregister_netdev(priv
->dev
);
1665 ipoib_dev_cleanup(priv
->dev
);
1666 free_netdev(priv
->dev
);
1672 static int __init
ipoib_init_module(void)
1676 ipoib_recvq_size
= roundup_pow_of_two(ipoib_recvq_size
);
1677 ipoib_recvq_size
= min(ipoib_recvq_size
, IPOIB_MAX_QUEUE_SIZE
);
1678 ipoib_recvq_size
= max(ipoib_recvq_size
, IPOIB_MIN_QUEUE_SIZE
);
1680 ipoib_sendq_size
= roundup_pow_of_two(ipoib_sendq_size
);
1681 ipoib_sendq_size
= min(ipoib_sendq_size
, IPOIB_MAX_QUEUE_SIZE
);
1682 ipoib_sendq_size
= max3(ipoib_sendq_size
, 2 * MAX_SEND_CQE
, IPOIB_MIN_QUEUE_SIZE
);
1683 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1684 ipoib_max_conn_qp
= min(ipoib_max_conn_qp
, IPOIB_CM_MAX_CONN_QP
);
1688 * When copying small received packets, we only copy from the
1689 * linear data part of the SKB, so we rely on this condition.
1691 BUILD_BUG_ON(IPOIB_CM_COPYBREAK
> IPOIB_CM_HEAD_SIZE
);
1693 ret
= ipoib_register_debugfs();
1698 * We create our own workqueue mainly because we want to be
1699 * able to flush it when devices are being removed. We can't
1700 * use schedule_work()/flush_scheduled_work() because both
1701 * unregister_netdev() and linkwatch_event take the rtnl lock,
1702 * so flush_scheduled_work() can deadlock during device
1705 ipoib_workqueue
= create_singlethread_workqueue("ipoib");
1706 if (!ipoib_workqueue
) {
1711 ib_sa_register_client(&ipoib_sa_client
);
1713 ret
= ib_register_client(&ipoib_client
);
1720 ib_sa_unregister_client(&ipoib_sa_client
);
1721 destroy_workqueue(ipoib_workqueue
);
1724 ipoib_unregister_debugfs();
1729 static void __exit
ipoib_cleanup_module(void)
1731 ib_unregister_client(&ipoib_client
);
1732 ib_sa_unregister_client(&ipoib_sa_client
);
1733 ipoib_unregister_debugfs();
1734 destroy_workqueue(ipoib_workqueue
);
1737 module_init(ipoib_init_module
);
1738 module_exit(ipoib_cleanup_module
);