2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $
39 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/vmalloc.h>
45 #include <linux/if_arp.h> /* For ARPHRD_xxx */
52 MODULE_AUTHOR("Roland Dreier");
53 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
54 MODULE_LICENSE("Dual BSD/GPL");
56 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
57 int ipoib_debug_level;
59 module_param_named(debug_level, ipoib_debug_level, int, 0644);
60 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
63 struct ipoib_path_iter {
64 struct net_device *dev;
65 struct ipoib_path path;
68 static const u8 ipv4_bcast_addr[] = {
69 0x00, 0xff, 0xff, 0xff,
70 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
71 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
74 struct workqueue_struct *ipoib_workqueue;
76 static void ipoib_add_one(struct ib_device *device);
77 static void ipoib_remove_one(struct ib_device *device);
79 static struct ib_client ipoib_client = {
82 .remove = ipoib_remove_one
85 int ipoib_open(struct net_device *dev)
87 struct ipoib_dev_priv *priv = netdev_priv(dev);
89 ipoib_dbg(priv, "bringing up interface\n");
91 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
93 if (ipoib_pkey_dev_delay_open(dev))
96 if (ipoib_ib_dev_open(dev))
99 if (ipoib_ib_dev_up(dev)) {
100 ipoib_ib_dev_stop(dev);
104 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
105 struct ipoib_dev_priv *cpriv;
107 /* Bring up any child interfaces too */
108 mutex_lock(&priv->vlan_mutex);
109 list_for_each_entry(cpriv, &priv->child_intfs, list) {
112 flags = cpriv->dev->flags;
116 dev_change_flags(cpriv->dev, flags | IFF_UP);
118 mutex_unlock(&priv->vlan_mutex);
121 netif_start_queue(dev);
126 static int ipoib_stop(struct net_device *dev)
128 struct ipoib_dev_priv *priv = netdev_priv(dev);
130 ipoib_dbg(priv, "stopping interface\n");
132 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
134 netif_stop_queue(dev);
137 * Now flush workqueue to make sure a scheduled task doesn't
138 * bring our internal state back up.
140 flush_workqueue(ipoib_workqueue);
142 ipoib_ib_dev_down(dev, 1);
143 ipoib_ib_dev_stop(dev);
145 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
146 struct ipoib_dev_priv *cpriv;
148 /* Bring down any child interfaces too */
149 mutex_lock(&priv->vlan_mutex);
150 list_for_each_entry(cpriv, &priv->child_intfs, list) {
153 flags = cpriv->dev->flags;
154 if (!(flags & IFF_UP))
157 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
159 mutex_unlock(&priv->vlan_mutex);
165 static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
167 struct ipoib_dev_priv *priv = netdev_priv(dev);
169 if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN)
172 priv->admin_mtu = new_mtu;
174 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
179 static struct ipoib_path *__path_find(struct net_device *dev,
182 struct ipoib_dev_priv *priv = netdev_priv(dev);
183 struct rb_node *n = priv->path_tree.rb_node;
184 struct ipoib_path *path;
188 path = rb_entry(n, struct ipoib_path, rb_node);
190 ret = memcmp(gid->raw, path->pathrec.dgid.raw,
191 sizeof (union ib_gid));
204 static int __path_add(struct net_device *dev, struct ipoib_path *path)
206 struct ipoib_dev_priv *priv = netdev_priv(dev);
207 struct rb_node **n = &priv->path_tree.rb_node;
208 struct rb_node *pn = NULL;
209 struct ipoib_path *tpath;
214 tpath = rb_entry(pn, struct ipoib_path, rb_node);
216 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
217 sizeof (union ib_gid));
226 rb_link_node(&path->rb_node, pn, n);
227 rb_insert_color(&path->rb_node, &priv->path_tree);
229 list_add_tail(&path->list, &priv->path_list);
234 static void path_free(struct net_device *dev, struct ipoib_path *path)
236 struct ipoib_dev_priv *priv = netdev_priv(dev);
237 struct ipoib_neigh *neigh, *tn;
241 while ((skb = __skb_dequeue(&path->queue)))
242 dev_kfree_skb_irq(skb);
244 spin_lock_irqsave(&priv->lock, flags);
246 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
248 * It's safe to call ipoib_put_ah() inside priv->lock
249 * here, because we know that path->ah will always
250 * hold one more reference, so ipoib_put_ah() will
251 * never do more than decrement the ref count.
254 ipoib_put_ah(neigh->ah);
255 *to_ipoib_neigh(neigh->neighbour) = NULL;
256 neigh->neighbour->ops->destructor = NULL;
260 spin_unlock_irqrestore(&priv->lock, flags);
263 ipoib_put_ah(path->ah);
268 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
270 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
272 struct ipoib_path_iter *iter;
274 iter = kmalloc(sizeof *iter, GFP_KERNEL);
279 memset(iter->path.pathrec.dgid.raw, 0, 16);
281 if (ipoib_path_iter_next(iter)) {
289 int ipoib_path_iter_next(struct ipoib_path_iter *iter)
291 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
293 struct ipoib_path *path;
296 spin_lock_irq(&priv->lock);
298 n = rb_first(&priv->path_tree);
301 path = rb_entry(n, struct ipoib_path, rb_node);
303 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
304 sizeof (union ib_gid)) < 0) {
313 spin_unlock_irq(&priv->lock);
318 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
319 struct ipoib_path *path)
324 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
326 void ipoib_flush_paths(struct net_device *dev)
328 struct ipoib_dev_priv *priv = netdev_priv(dev);
329 struct ipoib_path *path, *tp;
330 LIST_HEAD(remove_list);
333 spin_lock_irqsave(&priv->lock, flags);
335 list_splice(&priv->path_list, &remove_list);
336 INIT_LIST_HEAD(&priv->path_list);
338 list_for_each_entry(path, &remove_list, list)
339 rb_erase(&path->rb_node, &priv->path_tree);
341 spin_unlock_irqrestore(&priv->lock, flags);
343 list_for_each_entry_safe(path, tp, &remove_list, list) {
345 ib_sa_cancel_query(path->query_id, path->query);
346 wait_for_completion(&path->done);
347 path_free(dev, path);
351 static void path_rec_completion(int status,
352 struct ib_sa_path_rec *pathrec,
355 struct ipoib_path *path = path_ptr;
356 struct net_device *dev = path->dev;
357 struct ipoib_dev_priv *priv = netdev_priv(dev);
358 struct ipoib_ah *ah = NULL;
359 struct ipoib_neigh *neigh;
360 struct sk_buff_head skqueue;
365 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
366 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
368 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
369 status, IPOIB_GID_ARG(path->pathrec.dgid));
371 skb_queue_head_init(&skqueue);
374 struct ib_ah_attr av = {
375 .dlid = be16_to_cpu(pathrec->dlid),
377 .port_num = priv->port
379 int path_rate = ib_sa_rate_enum_to_int(pathrec->rate);
381 if (path_rate > 0 && priv->local_rate > path_rate)
382 av.static_rate = (priv->local_rate - 1) / path_rate;
384 ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n",
385 av.static_rate, priv->local_rate,
386 ib_sa_rate_enum_to_int(pathrec->rate));
388 ah = ipoib_create_ah(dev, priv->pd, &av);
391 spin_lock_irqsave(&priv->lock, flags);
396 path->pathrec = *pathrec;
398 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
399 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
401 while ((skb = __skb_dequeue(&path->queue)))
402 __skb_queue_tail(&skqueue, skb);
404 list_for_each_entry(neigh, &path->neigh_list, list) {
405 kref_get(&path->ah->ref);
406 neigh->ah = path->ah;
408 while ((skb = __skb_dequeue(&neigh->queue)))
409 __skb_queue_tail(&skqueue, skb);
414 complete(&path->done);
416 spin_unlock_irqrestore(&priv->lock, flags);
418 while ((skb = __skb_dequeue(&skqueue))) {
420 if (dev_queue_xmit(skb))
421 ipoib_warn(priv, "dev_queue_xmit failed "
422 "to requeue packet\n");
426 static struct ipoib_path *path_rec_create(struct net_device *dev,
429 struct ipoib_dev_priv *priv = netdev_priv(dev);
430 struct ipoib_path *path;
432 path = kzalloc(sizeof *path, GFP_ATOMIC);
438 skb_queue_head_init(&path->queue);
440 INIT_LIST_HEAD(&path->neigh_list);
442 memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid));
443 path->pathrec.sgid = priv->local_gid;
444 path->pathrec.pkey = cpu_to_be16(priv->pkey);
445 path->pathrec.numb_path = 1;
450 static int path_rec_start(struct net_device *dev,
451 struct ipoib_path *path)
453 struct ipoib_dev_priv *priv = netdev_priv(dev);
455 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
456 IPOIB_GID_ARG(path->pathrec.dgid));
458 init_completion(&path->done);
461 ib_sa_path_rec_get(priv->ca, priv->port,
463 IB_SA_PATH_REC_DGID |
464 IB_SA_PATH_REC_SGID |
465 IB_SA_PATH_REC_NUMB_PATH |
470 if (path->query_id < 0) {
471 ipoib_warn(priv, "ib_sa_path_rec_get failed\n");
473 return path->query_id;
479 static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
481 struct ipoib_dev_priv *priv = netdev_priv(dev);
482 struct ipoib_path *path;
483 struct ipoib_neigh *neigh;
485 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
487 ++priv->stats.tx_dropped;
488 dev_kfree_skb_any(skb);
492 skb_queue_head_init(&neigh->queue);
493 neigh->neighbour = skb->dst->neighbour;
494 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
497 * We can only be called from ipoib_start_xmit, so we're
498 * inside tx_lock -- no need to save/restore flags.
500 spin_lock(&priv->lock);
502 path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4));
504 path = path_rec_create(dev,
505 (union ib_gid *) (skb->dst->neighbour->ha + 4));
509 __path_add(dev, path);
512 list_add_tail(&neigh->list, &path->neigh_list);
515 kref_get(&path->ah->ref);
516 neigh->ah = path->ah;
518 ipoib_send(dev, skb, path->ah,
519 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
522 __skb_queue_tail(&neigh->queue, skb);
524 if (!path->query && path_rec_start(dev, path))
528 spin_unlock(&priv->lock);
532 *to_ipoib_neigh(skb->dst->neighbour) = NULL;
533 list_del(&neigh->list);
534 neigh->neighbour->ops->destructor = NULL;
537 ++priv->stats.tx_dropped;
538 dev_kfree_skb_any(skb);
540 spin_unlock(&priv->lock);
543 static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
545 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
547 /* Look up path record for unicasts */
548 if (skb->dst->neighbour->ha[4] != 0xff) {
549 neigh_add_path(skb, dev);
553 /* Add in the P_Key for multicasts */
554 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
555 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
556 ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb);
559 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
560 struct ipoib_pseudoheader *phdr)
562 struct ipoib_dev_priv *priv = netdev_priv(dev);
563 struct ipoib_path *path;
566 * We can only be called from ipoib_start_xmit, so we're
567 * inside tx_lock -- no need to save/restore flags.
569 spin_lock(&priv->lock);
571 path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4));
573 path = path_rec_create(dev,
574 (union ib_gid *) (phdr->hwaddr + 4));
576 /* put pseudoheader back on for next time */
577 skb_push(skb, sizeof *phdr);
578 __skb_queue_tail(&path->queue, skb);
580 if (path_rec_start(dev, path)) {
581 spin_unlock(&priv->lock);
582 path_free(dev, path);
585 __path_add(dev, path);
587 ++priv->stats.tx_dropped;
588 dev_kfree_skb_any(skb);
591 spin_unlock(&priv->lock);
596 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
597 be16_to_cpu(path->pathrec.dlid));
599 ipoib_send(dev, skb, path->ah,
600 be32_to_cpup((__be32 *) phdr->hwaddr));
601 } else if ((path->query || !path_rec_start(dev, path)) &&
602 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
603 /* put pseudoheader back on for next time */
604 skb_push(skb, sizeof *phdr);
605 __skb_queue_tail(&path->queue, skb);
607 ++priv->stats.tx_dropped;
608 dev_kfree_skb_any(skb);
611 spin_unlock(&priv->lock);
614 static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
616 struct ipoib_dev_priv *priv = netdev_priv(dev);
617 struct ipoib_neigh *neigh;
620 if (!spin_trylock_irqsave(&priv->tx_lock, flags))
621 return NETDEV_TX_LOCKED;
624 * Check if our queue is stopped. Since we have the LLTX bit
625 * set, we can't rely on netif_stop_queue() preventing our
626 * xmit function from being called with a full queue.
628 if (unlikely(netif_queue_stopped(dev))) {
629 spin_unlock_irqrestore(&priv->tx_lock, flags);
630 return NETDEV_TX_BUSY;
633 if (skb->dst && skb->dst->neighbour) {
634 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
635 ipoib_path_lookup(skb, dev);
639 neigh = *to_ipoib_neigh(skb->dst->neighbour);
641 if (likely(neigh->ah)) {
642 ipoib_send(dev, skb, neigh->ah,
643 be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
647 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
648 spin_lock(&priv->lock);
649 __skb_queue_tail(&neigh->queue, skb);
650 spin_unlock(&priv->lock);
652 ++priv->stats.tx_dropped;
653 dev_kfree_skb_any(skb);
656 struct ipoib_pseudoheader *phdr =
657 (struct ipoib_pseudoheader *) skb->data;
658 skb_pull(skb, sizeof *phdr);
660 if (phdr->hwaddr[4] == 0xff) {
661 /* Add in the P_Key for multicast*/
662 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
663 phdr->hwaddr[9] = priv->pkey & 0xff;
665 ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb);
667 /* unicast GID -- should be ARP or RARP reply */
669 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
670 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
671 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
673 skb->dst ? "neigh" : "dst",
674 be16_to_cpup((__be16 *) skb->data),
675 be32_to_cpup((__be32 *) phdr->hwaddr),
676 IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4)));
677 dev_kfree_skb_any(skb);
678 ++priv->stats.tx_dropped;
682 unicast_arp_send(skb, dev, phdr);
687 spin_unlock_irqrestore(&priv->tx_lock, flags);
692 static struct net_device_stats *ipoib_get_stats(struct net_device *dev)
694 struct ipoib_dev_priv *priv = netdev_priv(dev);
699 static void ipoib_timeout(struct net_device *dev)
701 struct ipoib_dev_priv *priv = netdev_priv(dev);
703 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
704 jiffies_to_msecs(jiffies - dev->trans_start));
705 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
706 netif_queue_stopped(dev),
707 priv->tx_head, priv->tx_tail);
708 /* XXX reset QP, etc. */
711 static int ipoib_hard_header(struct sk_buff *skb,
712 struct net_device *dev,
714 void *daddr, void *saddr, unsigned len)
716 struct ipoib_header *header;
718 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
720 header->proto = htons(type);
721 header->reserved = 0;
724 * If we don't have a neighbour structure, stuff the
725 * destination address onto the front of the skb so we can
726 * figure out where to send the packet later.
728 if (!skb->dst || !skb->dst->neighbour) {
729 struct ipoib_pseudoheader *phdr =
730 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
731 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
737 static void ipoib_set_mcast_list(struct net_device *dev)
739 struct ipoib_dev_priv *priv = netdev_priv(dev);
741 queue_work(ipoib_workqueue, &priv->restart_task);
744 static void ipoib_neigh_destructor(struct neighbour *n)
746 struct ipoib_neigh *neigh;
747 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
749 struct ipoib_ah *ah = NULL;
752 "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
753 be32_to_cpup((__be32 *) n->ha),
754 IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4))));
756 spin_lock_irqsave(&priv->lock, flags);
758 neigh = *to_ipoib_neigh(n);
762 list_del(&neigh->list);
763 *to_ipoib_neigh(n) = NULL;
767 spin_unlock_irqrestore(&priv->lock, flags);
773 static int ipoib_neigh_setup(struct neighbour *neigh)
776 * Is this kosher? I can't find anybody in the kernel that
777 * sets neigh->destructor, so we should be able to set it here
780 neigh->ops->destructor = ipoib_neigh_destructor;
785 static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
787 parms->neigh_setup = ipoib_neigh_setup;
792 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
794 struct ipoib_dev_priv *priv = netdev_priv(dev);
796 /* Allocate RX/TX "rings" to hold queued skbs */
798 priv->rx_ring = kzalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_rx_buf),
800 if (!priv->rx_ring) {
801 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
802 ca->name, IPOIB_RX_RING_SIZE);
806 priv->tx_ring = kzalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_tx_buf),
808 if (!priv->tx_ring) {
809 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
810 ca->name, IPOIB_TX_RING_SIZE);
811 goto out_rx_ring_cleanup;
814 /* priv->tx_head & tx_tail are already 0 */
816 if (ipoib_ib_dev_init(dev, ca, port))
817 goto out_tx_ring_cleanup;
822 kfree(priv->tx_ring);
825 kfree(priv->rx_ring);
831 void ipoib_dev_cleanup(struct net_device *dev)
833 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
835 ipoib_delete_debug_files(dev);
837 /* Delete any child interfaces first */
838 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
839 unregister_netdev(cpriv->dev);
840 ipoib_dev_cleanup(cpriv->dev);
841 free_netdev(cpriv->dev);
844 ipoib_ib_dev_cleanup(dev);
846 kfree(priv->rx_ring);
847 kfree(priv->tx_ring);
849 priv->rx_ring = NULL;
850 priv->tx_ring = NULL;
853 static void ipoib_setup(struct net_device *dev)
855 struct ipoib_dev_priv *priv = netdev_priv(dev);
857 dev->open = ipoib_open;
858 dev->stop = ipoib_stop;
859 dev->change_mtu = ipoib_change_mtu;
860 dev->hard_start_xmit = ipoib_start_xmit;
861 dev->get_stats = ipoib_get_stats;
862 dev->tx_timeout = ipoib_timeout;
863 dev->hard_header = ipoib_hard_header;
864 dev->set_multicast_list = ipoib_set_mcast_list;
865 dev->neigh_setup = ipoib_neigh_setup_dev;
867 dev->watchdog_timeo = HZ;
869 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
872 * We add in INFINIBAND_ALEN to allow for the destination
873 * address "pseudoheader" for skbs without neighbour struct.
875 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
876 dev->addr_len = INFINIBAND_ALEN;
877 dev->type = ARPHRD_INFINIBAND;
878 dev->tx_queue_len = IPOIB_TX_RING_SIZE * 2;
879 dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
881 /* MTU will be reset when mcast join happens */
882 dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN;
883 priv->mcast_mtu = priv->admin_mtu = dev->mtu;
885 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
887 netif_carrier_off(dev);
889 SET_MODULE_OWNER(dev);
893 spin_lock_init(&priv->lock);
894 spin_lock_init(&priv->tx_lock);
896 mutex_init(&priv->mcast_mutex);
897 mutex_init(&priv->vlan_mutex);
899 INIT_LIST_HEAD(&priv->path_list);
900 INIT_LIST_HEAD(&priv->child_intfs);
901 INIT_LIST_HEAD(&priv->dead_ahs);
902 INIT_LIST_HEAD(&priv->multicast_list);
904 INIT_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev);
905 INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev);
906 INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev);
907 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev);
908 INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev);
911 struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
913 struct net_device *dev;
915 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
920 return netdev_priv(dev);
923 static ssize_t show_pkey(struct class_device *cdev, char *buf)
925 struct ipoib_dev_priv *priv =
926 netdev_priv(container_of(cdev, struct net_device, class_dev));
928 return sprintf(buf, "0x%04x\n", priv->pkey);
930 static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
932 static ssize_t create_child(struct class_device *cdev,
933 const char *buf, size_t count)
938 if (sscanf(buf, "%i", &pkey) != 1)
941 if (pkey < 0 || pkey > 0xffff)
945 * Set the full membership bit, so that we join the right
946 * broadcast group, etc.
950 ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev),
953 return ret ? ret : count;
955 static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
957 static ssize_t delete_child(struct class_device *cdev,
958 const char *buf, size_t count)
963 if (sscanf(buf, "%i", &pkey) != 1)
966 if (pkey < 0 || pkey > 0xffff)
969 ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev),
972 return ret ? ret : count;
975 static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
977 int ipoib_add_pkey_attr(struct net_device *dev)
979 return class_device_create_file(&dev->class_dev,
980 &class_device_attr_pkey);
983 static struct net_device *ipoib_add_port(const char *format,
984 struct ib_device *hca, u8 port)
986 struct ipoib_dev_priv *priv;
987 int result = -ENOMEM;
989 priv = ipoib_intf_alloc(format);
991 goto alloc_mem_failed;
993 SET_NETDEV_DEV(priv->dev, hca->dma_device);
995 result = ib_query_pkey(hca, port, 0, &priv->pkey);
997 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
998 hca->name, port, result);
999 goto alloc_mem_failed;
1003 * Set the full membership bit, so that we join the right
1004 * broadcast group, etc.
1006 priv->pkey |= 0x8000;
1008 priv->dev->broadcast[8] = priv->pkey >> 8;
1009 priv->dev->broadcast[9] = priv->pkey & 0xff;
1011 result = ib_query_gid(hca, port, 0, &priv->local_gid);
1013 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1014 hca->name, port, result);
1015 goto alloc_mem_failed;
1017 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
1020 result = ipoib_dev_init(priv->dev, hca, port);
1022 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1023 hca->name, port, result);
1024 goto device_init_failed;
1027 INIT_IB_EVENT_HANDLER(&priv->event_handler,
1028 priv->ca, ipoib_event);
1029 result = ib_register_event_handler(&priv->event_handler);
1031 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1032 "port %d (ret = %d)\n",
1033 hca->name, port, result);
1037 result = register_netdev(priv->dev);
1039 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1040 hca->name, port, result);
1041 goto register_failed;
1044 ipoib_create_debug_files(priv->dev);
1046 if (ipoib_add_pkey_attr(priv->dev))
1048 if (class_device_create_file(&priv->dev->class_dev,
1049 &class_device_attr_create_child))
1051 if (class_device_create_file(&priv->dev->class_dev,
1052 &class_device_attr_delete_child))
1058 ipoib_delete_debug_files(priv->dev);
1059 unregister_netdev(priv->dev);
1062 ib_unregister_event_handler(&priv->event_handler);
1063 flush_scheduled_work();
1066 ipoib_dev_cleanup(priv->dev);
1069 free_netdev(priv->dev);
1072 return ERR_PTR(result);
1075 static void ipoib_add_one(struct ib_device *device)
1077 struct list_head *dev_list;
1078 struct net_device *dev;
1079 struct ipoib_dev_priv *priv;
1082 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1086 INIT_LIST_HEAD(dev_list);
1088 if (device->node_type == IB_NODE_SWITCH) {
1093 e = device->phys_port_cnt;
1096 for (p = s; p <= e; ++p) {
1097 dev = ipoib_add_port("ib%d", device, p);
1099 priv = netdev_priv(dev);
1100 list_add_tail(&priv->list, dev_list);
1104 ib_set_client_data(device, &ipoib_client, dev_list);
1107 static void ipoib_remove_one(struct ib_device *device)
1109 struct ipoib_dev_priv *priv, *tmp;
1110 struct list_head *dev_list;
1112 dev_list = ib_get_client_data(device, &ipoib_client);
1114 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1115 ib_unregister_event_handler(&priv->event_handler);
1116 flush_scheduled_work();
1118 unregister_netdev(priv->dev);
1119 ipoib_dev_cleanup(priv->dev);
1120 free_netdev(priv->dev);
1126 static int __init ipoib_init_module(void)
1130 ret = ipoib_register_debugfs();
1135 * We create our own workqueue mainly because we want to be
1136 * able to flush it when devices are being removed. We can't
1137 * use schedule_work()/flush_scheduled_work() because both
1138 * unregister_netdev() and linkwatch_event take the rtnl lock,
1139 * so flush_scheduled_work() can deadlock during device
1142 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1143 if (!ipoib_workqueue) {
1148 ret = ib_register_client(&ipoib_client);
1155 destroy_workqueue(ipoib_workqueue);
1158 ipoib_unregister_debugfs();
1163 static void __exit ipoib_cleanup_module(void)
1165 ib_unregister_client(&ipoib_client);
1166 ipoib_unregister_debugfs();
1167 destroy_workqueue(ipoib_workqueue);
1170 module_init(ipoib_init_module);
1171 module_exit(ipoib_cleanup_module);