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/kernel.h>
45 #include <linux/if_arp.h> /* For ARPHRD_xxx */
52 #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)
54 MODULE_AUTHOR("Roland Dreier");
55 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
56 MODULE_LICENSE("Dual BSD/GPL");
58 int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE;
59 int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE;
61 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
62 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
63 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
64 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
66 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
67 int ipoib_debug_level;
69 module_param_named(debug_level, ipoib_debug_level, int, 0644);
70 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
73 struct ipoib_path_iter {
74 struct net_device *dev;
75 struct ipoib_path path;
78 static const u8 ipv4_bcast_addr[] = {
79 0x00, 0xff, 0xff, 0xff,
80 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
81 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
84 struct workqueue_struct *ipoib_workqueue;
86 struct ib_sa_client ipoib_sa_client;
88 static void ipoib_add_one(struct ib_device *device);
89 static void ipoib_remove_one(struct ib_device *device);
91 static struct ib_client ipoib_client = {
94 .remove = ipoib_remove_one
97 int ipoib_open(struct net_device *dev)
99 struct ipoib_dev_priv *priv = netdev_priv(dev);
101 ipoib_dbg(priv, "bringing up interface\n");
103 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
105 if (ipoib_pkey_dev_delay_open(dev))
108 if (ipoib_ib_dev_open(dev))
111 if (ipoib_ib_dev_up(dev)) {
112 ipoib_ib_dev_stop(dev);
116 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
117 struct ipoib_dev_priv *cpriv;
119 /* Bring up any child interfaces too */
120 mutex_lock(&priv->vlan_mutex);
121 list_for_each_entry(cpriv, &priv->child_intfs, list) {
124 flags = cpriv->dev->flags;
128 dev_change_flags(cpriv->dev, flags | IFF_UP);
130 mutex_unlock(&priv->vlan_mutex);
133 netif_start_queue(dev);
138 static int ipoib_stop(struct net_device *dev)
140 struct ipoib_dev_priv *priv = netdev_priv(dev);
142 ipoib_dbg(priv, "stopping interface\n");
144 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
146 netif_stop_queue(dev);
149 * Now flush workqueue to make sure a scheduled task doesn't
150 * bring our internal state back up.
152 flush_workqueue(ipoib_workqueue);
154 ipoib_ib_dev_down(dev, 1);
155 ipoib_ib_dev_stop(dev);
157 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
158 struct ipoib_dev_priv *cpriv;
160 /* Bring down any child interfaces too */
161 mutex_lock(&priv->vlan_mutex);
162 list_for_each_entry(cpriv, &priv->child_intfs, list) {
165 flags = cpriv->dev->flags;
166 if (!(flags & IFF_UP))
169 dev_change_flags(cpriv->dev, flags & ~IFF_UP);
171 mutex_unlock(&priv->vlan_mutex);
177 static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
179 struct ipoib_dev_priv *priv = netdev_priv(dev);
181 if (new_mtu > IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN)
184 priv->admin_mtu = new_mtu;
186 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
191 static struct ipoib_path *__path_find(struct net_device *dev, void *gid)
193 struct ipoib_dev_priv *priv = netdev_priv(dev);
194 struct rb_node *n = priv->path_tree.rb_node;
195 struct ipoib_path *path;
199 path = rb_entry(n, struct ipoib_path, rb_node);
201 ret = memcmp(gid, path->pathrec.dgid.raw,
202 sizeof (union ib_gid));
215 static int __path_add(struct net_device *dev, struct ipoib_path *path)
217 struct ipoib_dev_priv *priv = netdev_priv(dev);
218 struct rb_node **n = &priv->path_tree.rb_node;
219 struct rb_node *pn = NULL;
220 struct ipoib_path *tpath;
225 tpath = rb_entry(pn, struct ipoib_path, rb_node);
227 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
228 sizeof (union ib_gid));
237 rb_link_node(&path->rb_node, pn, n);
238 rb_insert_color(&path->rb_node, &priv->path_tree);
240 list_add_tail(&path->list, &priv->path_list);
245 static void path_free(struct net_device *dev, struct ipoib_path *path)
247 struct ipoib_dev_priv *priv = netdev_priv(dev);
248 struct ipoib_neigh *neigh, *tn;
252 while ((skb = __skb_dequeue(&path->queue)))
253 dev_kfree_skb_irq(skb);
255 spin_lock_irqsave(&priv->lock, flags);
257 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
259 * It's safe to call ipoib_put_ah() inside priv->lock
260 * here, because we know that path->ah will always
261 * hold one more reference, so ipoib_put_ah() will
262 * never do more than decrement the ref count.
265 ipoib_put_ah(neigh->ah);
267 ipoib_neigh_free(neigh);
270 spin_unlock_irqrestore(&priv->lock, flags);
273 ipoib_put_ah(path->ah);
278 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
280 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
282 struct ipoib_path_iter *iter;
284 iter = kmalloc(sizeof *iter, GFP_KERNEL);
289 memset(iter->path.pathrec.dgid.raw, 0, 16);
291 if (ipoib_path_iter_next(iter)) {
299 int ipoib_path_iter_next(struct ipoib_path_iter *iter)
301 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
303 struct ipoib_path *path;
306 spin_lock_irq(&priv->lock);
308 n = rb_first(&priv->path_tree);
311 path = rb_entry(n, struct ipoib_path, rb_node);
313 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
314 sizeof (union ib_gid)) < 0) {
323 spin_unlock_irq(&priv->lock);
328 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
329 struct ipoib_path *path)
334 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
336 void ipoib_flush_paths(struct net_device *dev)
338 struct ipoib_dev_priv *priv = netdev_priv(dev);
339 struct ipoib_path *path, *tp;
340 LIST_HEAD(remove_list);
342 spin_lock_irq(&priv->tx_lock);
343 spin_lock(&priv->lock);
345 list_splice(&priv->path_list, &remove_list);
346 INIT_LIST_HEAD(&priv->path_list);
348 list_for_each_entry(path, &remove_list, list)
349 rb_erase(&path->rb_node, &priv->path_tree);
351 list_for_each_entry_safe(path, tp, &remove_list, list) {
353 ib_sa_cancel_query(path->query_id, path->query);
354 spin_unlock(&priv->lock);
355 spin_unlock_irq(&priv->tx_lock);
356 wait_for_completion(&path->done);
357 path_free(dev, path);
358 spin_lock_irq(&priv->tx_lock);
359 spin_lock(&priv->lock);
361 spin_unlock(&priv->lock);
362 spin_unlock_irq(&priv->tx_lock);
365 static void path_rec_completion(int status,
366 struct ib_sa_path_rec *pathrec,
369 struct ipoib_path *path = path_ptr;
370 struct net_device *dev = path->dev;
371 struct ipoib_dev_priv *priv = netdev_priv(dev);
372 struct ipoib_ah *ah = NULL;
373 struct ipoib_neigh *neigh;
374 struct sk_buff_head skqueue;
379 ipoib_dbg(priv, "PathRec LID 0x%04x for GID " IPOIB_GID_FMT "\n",
380 be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid));
382 ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n",
383 status, IPOIB_GID_ARG(path->pathrec.dgid));
385 skb_queue_head_init(&skqueue);
388 struct ib_ah_attr av = {
389 .dlid = be16_to_cpu(pathrec->dlid),
391 .port_num = priv->port,
392 .static_rate = pathrec->rate
395 ah = ipoib_create_ah(dev, priv->pd, &av);
398 spin_lock_irqsave(&priv->lock, flags);
403 path->pathrec = *pathrec;
405 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
406 ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
408 while ((skb = __skb_dequeue(&path->queue)))
409 __skb_queue_tail(&skqueue, skb);
411 list_for_each_entry(neigh, &path->neigh_list, list) {
412 kref_get(&path->ah->ref);
413 neigh->ah = path->ah;
414 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
415 sizeof(union ib_gid));
417 while ((skb = __skb_dequeue(&neigh->queue)))
418 __skb_queue_tail(&skqueue, skb);
423 complete(&path->done);
425 spin_unlock_irqrestore(&priv->lock, flags);
427 while ((skb = __skb_dequeue(&skqueue))) {
429 if (dev_queue_xmit(skb))
430 ipoib_warn(priv, "dev_queue_xmit failed "
431 "to requeue packet\n");
435 static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
437 struct ipoib_dev_priv *priv = netdev_priv(dev);
438 struct ipoib_path *path;
440 path = kzalloc(sizeof *path, GFP_ATOMIC);
446 skb_queue_head_init(&path->queue);
448 INIT_LIST_HEAD(&path->neigh_list);
450 memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid));
451 path->pathrec.sgid = priv->local_gid;
452 path->pathrec.pkey = cpu_to_be16(priv->pkey);
453 path->pathrec.numb_path = 1;
458 static int path_rec_start(struct net_device *dev,
459 struct ipoib_path *path)
461 struct ipoib_dev_priv *priv = netdev_priv(dev);
463 ipoib_dbg(priv, "Start path record lookup for " IPOIB_GID_FMT "\n",
464 IPOIB_GID_ARG(path->pathrec.dgid));
466 init_completion(&path->done);
469 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
471 IB_SA_PATH_REC_DGID |
472 IB_SA_PATH_REC_SGID |
473 IB_SA_PATH_REC_NUMB_PATH |
478 if (path->query_id < 0) {
479 ipoib_warn(priv, "ib_sa_path_rec_get failed\n");
481 return path->query_id;
487 static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
489 struct ipoib_dev_priv *priv = netdev_priv(dev);
490 struct ipoib_path *path;
491 struct ipoib_neigh *neigh;
493 neigh = ipoib_neigh_alloc(skb->dst->neighbour);
495 ++priv->stats.tx_dropped;
496 dev_kfree_skb_any(skb);
500 skb_queue_head_init(&neigh->queue);
503 * We can only be called from ipoib_start_xmit, so we're
504 * inside tx_lock -- no need to save/restore flags.
506 spin_lock(&priv->lock);
508 path = __path_find(dev, skb->dst->neighbour->ha + 4);
510 path = path_rec_create(dev, skb->dst->neighbour->ha + 4);
514 __path_add(dev, path);
517 list_add_tail(&neigh->list, &path->neigh_list);
520 kref_get(&path->ah->ref);
521 neigh->ah = path->ah;
522 memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
523 sizeof(union ib_gid));
525 ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha));
528 __skb_queue_tail(&neigh->queue, skb);
530 if (!path->query && path_rec_start(dev, path))
534 spin_unlock(&priv->lock);
538 list_del(&neigh->list);
541 ipoib_neigh_free(neigh);
542 ++priv->stats.tx_dropped;
543 dev_kfree_skb_any(skb);
545 spin_unlock(&priv->lock);
548 static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
550 struct ipoib_dev_priv *priv = netdev_priv(skb->dev);
552 /* Look up path record for unicasts */
553 if (skb->dst->neighbour->ha[4] != 0xff) {
554 neigh_add_path(skb, dev);
558 /* Add in the P_Key for multicasts */
559 skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
560 skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
561 ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb);
564 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
565 struct ipoib_pseudoheader *phdr)
567 struct ipoib_dev_priv *priv = netdev_priv(dev);
568 struct ipoib_path *path;
571 * We can only be called from ipoib_start_xmit, so we're
572 * inside tx_lock -- no need to save/restore flags.
574 spin_lock(&priv->lock);
576 path = __path_find(dev, phdr->hwaddr + 4);
578 path = path_rec_create(dev, phdr->hwaddr + 4);
580 /* put pseudoheader back on for next time */
581 skb_push(skb, sizeof *phdr);
582 __skb_queue_tail(&path->queue, skb);
584 if (path_rec_start(dev, path)) {
585 spin_unlock(&priv->lock);
586 path_free(dev, path);
589 __path_add(dev, path);
591 ++priv->stats.tx_dropped;
592 dev_kfree_skb_any(skb);
595 spin_unlock(&priv->lock);
600 ipoib_dbg(priv, "Send unicast ARP to %04x\n",
601 be16_to_cpu(path->pathrec.dlid));
603 ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr));
604 } else if ((path->query || !path_rec_start(dev, path)) &&
605 skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
606 /* put pseudoheader back on for next time */
607 skb_push(skb, sizeof *phdr);
608 __skb_queue_tail(&path->queue, skb);
610 ++priv->stats.tx_dropped;
611 dev_kfree_skb_any(skb);
614 spin_unlock(&priv->lock);
617 static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
619 struct ipoib_dev_priv *priv = netdev_priv(dev);
620 struct ipoib_neigh *neigh;
623 if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags)))
624 return NETDEV_TX_LOCKED;
627 * Check if our queue is stopped. Since we have the LLTX bit
628 * set, we can't rely on netif_stop_queue() preventing our
629 * xmit function from being called with a full queue.
631 if (unlikely(netif_queue_stopped(dev))) {
632 spin_unlock_irqrestore(&priv->tx_lock, flags);
633 return NETDEV_TX_BUSY;
636 if (likely(skb->dst && skb->dst->neighbour)) {
637 if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
638 ipoib_path_lookup(skb, dev);
642 neigh = *to_ipoib_neigh(skb->dst->neighbour);
644 if (likely(neigh->ah)) {
645 if (unlikely(memcmp(&neigh->dgid.raw,
646 skb->dst->neighbour->ha + 4,
647 sizeof(union ib_gid)))) {
648 spin_lock(&priv->lock);
650 * It's safe to call ipoib_put_ah() inside
651 * priv->lock here, because we know that
652 * path->ah will always hold one more reference,
653 * so ipoib_put_ah() will never do more than
654 * decrement the ref count.
656 ipoib_put_ah(neigh->ah);
657 list_del(&neigh->list);
658 ipoib_neigh_free(neigh);
659 spin_unlock(&priv->lock);
660 ipoib_path_lookup(skb, dev);
664 ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha));
668 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
669 spin_lock(&priv->lock);
670 __skb_queue_tail(&neigh->queue, skb);
671 spin_unlock(&priv->lock);
673 ++priv->stats.tx_dropped;
674 dev_kfree_skb_any(skb);
677 struct ipoib_pseudoheader *phdr =
678 (struct ipoib_pseudoheader *) skb->data;
679 skb_pull(skb, sizeof *phdr);
681 if (phdr->hwaddr[4] == 0xff) {
682 /* Add in the P_Key for multicast*/
683 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
684 phdr->hwaddr[9] = priv->pkey & 0xff;
686 ipoib_mcast_send(dev, phdr->hwaddr + 4, skb);
688 /* unicast GID -- should be ARP or RARP reply */
690 if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) &&
691 (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) {
692 ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
694 skb->dst ? "neigh" : "dst",
695 be16_to_cpup((__be16 *) skb->data),
696 IPOIB_QPN(phdr->hwaddr),
697 IPOIB_GID_RAW_ARG(phdr->hwaddr + 4));
698 dev_kfree_skb_any(skb);
699 ++priv->stats.tx_dropped;
703 unicast_arp_send(skb, dev, phdr);
708 spin_unlock_irqrestore(&priv->tx_lock, flags);
713 static struct net_device_stats *ipoib_get_stats(struct net_device *dev)
715 struct ipoib_dev_priv *priv = netdev_priv(dev);
720 static void ipoib_timeout(struct net_device *dev)
722 struct ipoib_dev_priv *priv = netdev_priv(dev);
724 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
725 jiffies_to_msecs(jiffies - dev->trans_start));
726 ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n",
727 netif_queue_stopped(dev),
728 priv->tx_head, priv->tx_tail);
729 /* XXX reset QP, etc. */
732 static int ipoib_hard_header(struct sk_buff *skb,
733 struct net_device *dev,
735 void *daddr, void *saddr, unsigned len)
737 struct ipoib_header *header;
739 header = (struct ipoib_header *) skb_push(skb, sizeof *header);
741 header->proto = htons(type);
742 header->reserved = 0;
745 * If we don't have a neighbour structure, stuff the
746 * destination address onto the front of the skb so we can
747 * figure out where to send the packet later.
749 if ((!skb->dst || !skb->dst->neighbour) && daddr) {
750 struct ipoib_pseudoheader *phdr =
751 (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr);
752 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
758 static void ipoib_set_mcast_list(struct net_device *dev)
760 struct ipoib_dev_priv *priv = netdev_priv(dev);
762 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
763 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
767 queue_work(ipoib_workqueue, &priv->restart_task);
770 static void ipoib_neigh_destructor(struct neighbour *n)
772 struct ipoib_neigh *neigh;
773 struct ipoib_dev_priv *priv = netdev_priv(n->dev);
775 struct ipoib_ah *ah = NULL;
778 "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
780 IPOIB_GID_RAW_ARG(n->ha + 4));
782 spin_lock_irqsave(&priv->lock, flags);
784 neigh = *to_ipoib_neigh(n);
788 list_del(&neigh->list);
789 ipoib_neigh_free(neigh);
792 spin_unlock_irqrestore(&priv->lock, flags);
798 struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour)
800 struct ipoib_neigh *neigh;
802 neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
806 neigh->neighbour = neighbour;
807 *to_ipoib_neigh(neighbour) = neigh;
812 void ipoib_neigh_free(struct ipoib_neigh *neigh)
814 *to_ipoib_neigh(neigh->neighbour) = NULL;
818 static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
820 parms->neigh_destructor = ipoib_neigh_destructor;
825 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
827 struct ipoib_dev_priv *priv = netdev_priv(dev);
829 /* Allocate RX/TX "rings" to hold queued skbs */
830 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
832 if (!priv->rx_ring) {
833 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
834 ca->name, ipoib_recvq_size);
838 priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring,
840 if (!priv->tx_ring) {
841 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
842 ca->name, ipoib_sendq_size);
843 goto out_rx_ring_cleanup;
846 /* priv->tx_head & tx_tail are already 0 */
848 if (ipoib_ib_dev_init(dev, ca, port))
849 goto out_tx_ring_cleanup;
854 kfree(priv->tx_ring);
857 kfree(priv->rx_ring);
863 void ipoib_dev_cleanup(struct net_device *dev)
865 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
867 ipoib_delete_debug_files(dev);
869 /* Delete any child interfaces first */
870 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
871 unregister_netdev(cpriv->dev);
872 ipoib_dev_cleanup(cpriv->dev);
873 free_netdev(cpriv->dev);
876 ipoib_ib_dev_cleanup(dev);
878 kfree(priv->rx_ring);
879 kfree(priv->tx_ring);
881 priv->rx_ring = NULL;
882 priv->tx_ring = NULL;
885 static void ipoib_setup(struct net_device *dev)
887 struct ipoib_dev_priv *priv = netdev_priv(dev);
889 dev->open = ipoib_open;
890 dev->stop = ipoib_stop;
891 dev->change_mtu = ipoib_change_mtu;
892 dev->hard_start_xmit = ipoib_start_xmit;
893 dev->get_stats = ipoib_get_stats;
894 dev->tx_timeout = ipoib_timeout;
895 dev->hard_header = ipoib_hard_header;
896 dev->set_multicast_list = ipoib_set_mcast_list;
897 dev->neigh_setup = ipoib_neigh_setup_dev;
899 dev->watchdog_timeo = HZ;
901 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
904 * We add in INFINIBAND_ALEN to allow for the destination
905 * address "pseudoheader" for skbs without neighbour struct.
907 dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN;
908 dev->addr_len = INFINIBAND_ALEN;
909 dev->type = ARPHRD_INFINIBAND;
910 dev->tx_queue_len = ipoib_sendq_size * 2;
911 dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
913 /* MTU will be reset when mcast join happens */
914 dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN;
915 priv->mcast_mtu = priv->admin_mtu = dev->mtu;
917 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
919 netif_carrier_off(dev);
921 SET_MODULE_OWNER(dev);
925 spin_lock_init(&priv->lock);
926 spin_lock_init(&priv->tx_lock);
928 mutex_init(&priv->mcast_mutex);
929 mutex_init(&priv->vlan_mutex);
931 INIT_LIST_HEAD(&priv->path_list);
932 INIT_LIST_HEAD(&priv->child_intfs);
933 INIT_LIST_HEAD(&priv->dead_ahs);
934 INIT_LIST_HEAD(&priv->multicast_list);
936 INIT_DELAYED_WORK(&priv->pkey_task, ipoib_pkey_poll);
937 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
938 INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush);
939 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
940 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
943 struct ipoib_dev_priv *ipoib_intf_alloc(const char *name)
945 struct net_device *dev;
947 dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name,
952 return netdev_priv(dev);
955 static ssize_t show_pkey(struct class_device *cdev, char *buf)
957 struct ipoib_dev_priv *priv =
958 netdev_priv(container_of(cdev, struct net_device, class_dev));
960 return sprintf(buf, "0x%04x\n", priv->pkey);
962 static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
964 static ssize_t create_child(struct class_device *cdev,
965 const char *buf, size_t count)
970 if (sscanf(buf, "%i", &pkey) != 1)
973 if (pkey < 0 || pkey > 0xffff)
977 * Set the full membership bit, so that we join the right
978 * broadcast group, etc.
982 ret = ipoib_vlan_add(container_of(cdev, struct net_device, class_dev),
985 return ret ? ret : count;
987 static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
989 static ssize_t delete_child(struct class_device *cdev,
990 const char *buf, size_t count)
995 if (sscanf(buf, "%i", &pkey) != 1)
998 if (pkey < 0 || pkey > 0xffff)
1001 ret = ipoib_vlan_delete(container_of(cdev, struct net_device, class_dev),
1004 return ret ? ret : count;
1007 static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
1009 int ipoib_add_pkey_attr(struct net_device *dev)
1011 return class_device_create_file(&dev->class_dev,
1012 &class_device_attr_pkey);
1015 static struct net_device *ipoib_add_port(const char *format,
1016 struct ib_device *hca, u8 port)
1018 struct ipoib_dev_priv *priv;
1019 int result = -ENOMEM;
1021 priv = ipoib_intf_alloc(format);
1023 goto alloc_mem_failed;
1025 SET_NETDEV_DEV(priv->dev, hca->dma_device);
1027 result = ib_query_pkey(hca, port, 0, &priv->pkey);
1029 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
1030 hca->name, port, result);
1031 goto alloc_mem_failed;
1035 * Set the full membership bit, so that we join the right
1036 * broadcast group, etc.
1038 priv->pkey |= 0x8000;
1040 priv->dev->broadcast[8] = priv->pkey >> 8;
1041 priv->dev->broadcast[9] = priv->pkey & 0xff;
1043 result = ib_query_gid(hca, port, 0, &priv->local_gid);
1045 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1046 hca->name, port, result);
1047 goto alloc_mem_failed;
1049 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
1052 result = ipoib_dev_init(priv->dev, hca, port);
1054 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1055 hca->name, port, result);
1056 goto device_init_failed;
1059 INIT_IB_EVENT_HANDLER(&priv->event_handler,
1060 priv->ca, ipoib_event);
1061 result = ib_register_event_handler(&priv->event_handler);
1063 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1064 "port %d (ret = %d)\n",
1065 hca->name, port, result);
1069 result = register_netdev(priv->dev);
1071 printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",
1072 hca->name, port, result);
1073 goto register_failed;
1076 ipoib_create_debug_files(priv->dev);
1078 if (ipoib_add_pkey_attr(priv->dev))
1080 if (class_device_create_file(&priv->dev->class_dev,
1081 &class_device_attr_create_child))
1083 if (class_device_create_file(&priv->dev->class_dev,
1084 &class_device_attr_delete_child))
1090 ipoib_delete_debug_files(priv->dev);
1091 unregister_netdev(priv->dev);
1094 ib_unregister_event_handler(&priv->event_handler);
1095 flush_scheduled_work();
1098 ipoib_dev_cleanup(priv->dev);
1101 free_netdev(priv->dev);
1104 return ERR_PTR(result);
1107 static void ipoib_add_one(struct ib_device *device)
1109 struct list_head *dev_list;
1110 struct net_device *dev;
1111 struct ipoib_dev_priv *priv;
1114 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1117 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1121 INIT_LIST_HEAD(dev_list);
1123 if (device->node_type == RDMA_NODE_IB_SWITCH) {
1128 e = device->phys_port_cnt;
1131 for (p = s; p <= e; ++p) {
1132 dev = ipoib_add_port("ib%d", device, p);
1134 priv = netdev_priv(dev);
1135 list_add_tail(&priv->list, dev_list);
1139 ib_set_client_data(device, &ipoib_client, dev_list);
1142 static void ipoib_remove_one(struct ib_device *device)
1144 struct ipoib_dev_priv *priv, *tmp;
1145 struct list_head *dev_list;
1147 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1150 dev_list = ib_get_client_data(device, &ipoib_client);
1152 list_for_each_entry_safe(priv, tmp, dev_list, list) {
1153 ib_unregister_event_handler(&priv->event_handler);
1154 flush_scheduled_work();
1156 unregister_netdev(priv->dev);
1157 ipoib_dev_cleanup(priv->dev);
1158 free_netdev(priv->dev);
1164 static int __init ipoib_init_module(void)
1168 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1169 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1170 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1172 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1173 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1174 ipoib_sendq_size = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE);
1176 ret = ipoib_register_debugfs();
1181 * We create our own workqueue mainly because we want to be
1182 * able to flush it when devices are being removed. We can't
1183 * use schedule_work()/flush_scheduled_work() because both
1184 * unregister_netdev() and linkwatch_event take the rtnl lock,
1185 * so flush_scheduled_work() can deadlock during device
1188 ipoib_workqueue = create_singlethread_workqueue("ipoib");
1189 if (!ipoib_workqueue) {
1194 ib_sa_register_client(&ipoib_sa_client);
1196 ret = ib_register_client(&ipoib_client);
1203 ib_sa_unregister_client(&ipoib_sa_client);
1204 destroy_workqueue(ipoib_workqueue);
1207 ipoib_unregister_debugfs();
1212 static void __exit ipoib_cleanup_module(void)
1214 ib_unregister_client(&ipoib_client);
1215 ib_sa_unregister_client(&ipoib_sa_client);
1216 ipoib_unregister_debugfs();
1217 destroy_workqueue(ipoib_workqueue);
1220 module_init(ipoib_init_module);
1221 module_exit(ipoib_cleanup_module);