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>
51 #include <net/addrconf.h>
52 #include <linux/inetdevice.h>
53 #include <rdma/ib_cache.h>
55 MODULE_AUTHOR("Roland Dreier");
56 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
57 MODULE_LICENSE("Dual BSD/GPL");
59 int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE;
60 int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE;
62 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
63 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
64 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
65 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
67 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
68 int ipoib_debug_level;
70 module_param_named(debug_level, ipoib_debug_level, int, 0644);
71 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
74 struct ipoib_path_iter {
75 struct net_device *dev;
76 struct ipoib_path path;
79 static const u8 ipv4_bcast_addr[] = {
80 0x00, 0xff, 0xff, 0xff,
81 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
85 struct workqueue_struct *ipoib_workqueue;
87 struct ib_sa_client ipoib_sa_client;
89 static int ipoib_add_one(struct ib_device *device);
90 static void ipoib_remove_one(struct ib_device *device, void *client_data);
91 static void ipoib_neigh_reclaim(struct rcu_head *rp);
92 static struct net_device *ipoib_get_net_dev_by_params(
93 struct ib_device *dev, u8 port, u16 pkey,
94 const union ib_gid *gid, const struct sockaddr *addr,
96 static int ipoib_set_mac(struct net_device *dev, void *addr);
97 static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr,
100 static struct ib_client ipoib_client = {
102 .add = ipoib_add_one,
103 .remove = ipoib_remove_one,
104 .get_net_dev_by_params = ipoib_get_net_dev_by_params,
107 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
108 static int ipoib_netdev_event(struct notifier_block *this,
109 unsigned long event, void *ptr)
111 struct netdev_notifier_info *ni = ptr;
112 struct net_device *dev = ni->dev;
114 if (dev->netdev_ops->ndo_open != ipoib_open)
118 case NETDEV_REGISTER:
119 ipoib_create_debug_files(dev);
121 case NETDEV_CHANGENAME:
122 ipoib_delete_debug_files(dev);
123 ipoib_create_debug_files(dev);
125 case NETDEV_UNREGISTER:
126 ipoib_delete_debug_files(dev);
134 int ipoib_open(struct net_device *dev)
136 struct ipoib_dev_priv *priv = ipoib_priv(dev);
138 ipoib_dbg(priv, "bringing up interface\n");
140 netif_carrier_off(dev);
142 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
144 priv->sm_fullmember_sendonly_support = false;
146 if (ipoib_ib_dev_open(dev)) {
147 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
152 ipoib_ib_dev_up(dev);
154 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
155 struct ipoib_dev_priv *cpriv;
157 /* Bring up any child interfaces too */
158 down_read(&priv->vlan_rwsem);
159 list_for_each_entry(cpriv, &priv->child_intfs, list) {
162 flags = cpriv->dev->flags;
166 dev_change_flags(cpriv->dev, flags | IFF_UP, NULL);
168 up_read(&priv->vlan_rwsem);
171 netif_start_queue(dev);
176 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
181 static int ipoib_stop(struct net_device *dev)
183 struct ipoib_dev_priv *priv = ipoib_priv(dev);
185 ipoib_dbg(priv, "stopping interface\n");
187 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
189 netif_stop_queue(dev);
191 ipoib_ib_dev_down(dev);
192 ipoib_ib_dev_stop(dev);
194 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
195 struct ipoib_dev_priv *cpriv;
197 /* Bring down any child interfaces too */
198 down_read(&priv->vlan_rwsem);
199 list_for_each_entry(cpriv, &priv->child_intfs, list) {
202 flags = cpriv->dev->flags;
203 if (!(flags & IFF_UP))
206 dev_change_flags(cpriv->dev, flags & ~IFF_UP, NULL);
208 up_read(&priv->vlan_rwsem);
214 static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features)
216 struct ipoib_dev_priv *priv = ipoib_priv(dev);
218 if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags))
219 features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO);
224 static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
226 struct ipoib_dev_priv *priv = ipoib_priv(dev);
229 /* dev->mtu > 2K ==> connected mode */
230 if (ipoib_cm_admin_enabled(dev)) {
231 if (new_mtu > ipoib_cm_max_mtu(dev))
234 if (new_mtu > priv->mcast_mtu)
235 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
242 if (new_mtu < (ETH_MIN_MTU + IPOIB_ENCAP_LEN) ||
243 new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
246 priv->admin_mtu = new_mtu;
248 if (priv->mcast_mtu < priv->admin_mtu)
249 ipoib_dbg(priv, "MTU must be smaller than the underlying "
250 "link layer MTU - 4 (%u)\n", priv->mcast_mtu);
252 new_mtu = min(priv->mcast_mtu, priv->admin_mtu);
254 if (priv->rn_ops->ndo_change_mtu) {
255 bool carrier_status = netif_carrier_ok(dev);
257 netif_carrier_off(dev);
259 /* notify lower level on the real mtu */
260 ret = priv->rn_ops->ndo_change_mtu(dev, new_mtu);
263 netif_carrier_on(dev);
271 static void ipoib_get_stats(struct net_device *dev,
272 struct rtnl_link_stats64 *stats)
274 struct ipoib_dev_priv *priv = ipoib_priv(dev);
276 if (priv->rn_ops->ndo_get_stats64)
277 priv->rn_ops->ndo_get_stats64(dev, stats);
279 netdev_stats_to_stats64(stats, &dev->stats);
282 /* Called with an RCU read lock taken */
283 static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr,
284 struct net_device *dev)
286 struct net *net = dev_net(dev);
287 struct in_device *in_dev;
288 struct sockaddr_in *addr_in = (struct sockaddr_in *)addr;
289 struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr;
292 switch (addr->sa_family) {
294 in_dev = in_dev_get(dev);
298 ret_addr = inet_confirm_addr(net, in_dev, 0,
299 addr_in->sin_addr.s_addr,
307 if (IS_ENABLED(CONFIG_IPV6) &&
308 ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1))
317 * Find the master net_device on top of the given net_device.
318 * @dev: base IPoIB net_device
320 * Returns the master net_device with a reference held, or the same net_device
321 * if no master exists.
323 static struct net_device *ipoib_get_master_net_dev(struct net_device *dev)
325 struct net_device *master;
328 master = netdev_master_upper_dev_get_rcu(dev);
340 struct ipoib_walk_data {
341 const struct sockaddr *addr;
342 struct net_device *result;
345 static int ipoib_upper_walk(struct net_device *upper,
346 struct netdev_nested_priv *priv)
348 struct ipoib_walk_data *data = (struct ipoib_walk_data *)priv->data;
351 if (ipoib_is_dev_match_addr_rcu(data->addr, upper)) {
353 data->result = upper;
361 * Find a net_device matching the given address, which is an upper device of
362 * the given net_device.
363 * @addr: IP address to look for.
364 * @dev: base IPoIB net_device
366 * If found, returns the net_device with a reference held. Otherwise return
369 static struct net_device *ipoib_get_net_dev_match_addr(
370 const struct sockaddr *addr, struct net_device *dev)
372 struct netdev_nested_priv priv;
373 struct ipoib_walk_data data = {
377 priv.data = (void *)&data;
379 if (ipoib_is_dev_match_addr_rcu(addr, dev)) {
385 netdev_walk_all_upper_dev_rcu(dev, ipoib_upper_walk, &priv);
391 /* returns the number of IPoIB netdevs on top a given ipoib device matching a
392 * pkey_index and address, if one exists.
394 * @found_net_dev: contains a matching net_device if the return value >= 1,
395 * with a reference held. */
396 static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv,
397 const union ib_gid *gid,
399 const struct sockaddr *addr,
401 struct net_device **found_net_dev)
403 struct ipoib_dev_priv *child_priv;
404 struct net_device *net_dev = NULL;
407 if (priv->pkey_index == pkey_index &&
408 (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) {
410 net_dev = ipoib_get_master_net_dev(priv->dev);
412 /* Verify the net_device matches the IP address, as
413 * IPoIB child devices currently share a GID. */
414 net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev);
418 *found_net_dev = net_dev;
425 /* Check child interfaces */
426 down_read_nested(&priv->vlan_rwsem, nesting);
427 list_for_each_entry(child_priv, &priv->child_intfs, list) {
428 matches += ipoib_match_gid_pkey_addr(child_priv, gid,
435 up_read(&priv->vlan_rwsem);
440 /* Returns the number of matching net_devs found (between 0 and 2). Also
441 * return the matching net_device in the @net_dev parameter, holding a
442 * reference to the net_device, if the number of matches >= 1 */
443 static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port,
445 const union ib_gid *gid,
446 const struct sockaddr *addr,
447 struct net_device **net_dev)
449 struct ipoib_dev_priv *priv;
454 list_for_each_entry(priv, dev_list, list) {
455 if (priv->port != port)
458 matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index,
467 static struct net_device *ipoib_get_net_dev_by_params(
468 struct ib_device *dev, u8 port, u16 pkey,
469 const union ib_gid *gid, const struct sockaddr *addr,
472 struct net_device *net_dev;
473 struct list_head *dev_list = client_data;
478 if (!rdma_protocol_ib(dev, port))
481 ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index);
485 /* See if we can find a unique device matching the L2 parameters */
486 matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
487 gid, NULL, &net_dev);
498 /* Couldn't find a unique device with L2 parameters only. Use L3
499 * address to uniquely match the net device */
500 matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
501 gid, addr, &net_dev);
506 dev_warn_ratelimited(&dev->dev,
507 "duplicate IP address detected\n");
514 int ipoib_set_mode(struct net_device *dev, const char *buf)
516 struct ipoib_dev_priv *priv = ipoib_priv(dev);
518 if ((test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
519 !strcmp(buf, "connected\n")) ||
520 (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
521 !strcmp(buf, "datagram\n"))) {
525 /* flush paths if we switch modes so that connections are restarted */
526 if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) {
527 set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
528 ipoib_warn(priv, "enabling connected mode "
529 "will cause multicast packet drops\n");
530 netdev_update_features(dev);
531 dev_set_mtu(dev, ipoib_cm_max_mtu(dev));
532 netif_set_real_num_tx_queues(dev, 1);
534 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
536 ipoib_flush_paths(dev);
537 return (!rtnl_trylock()) ? -EBUSY : 0;
540 if (!strcmp(buf, "datagram\n")) {
541 clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
542 netdev_update_features(dev);
543 dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
544 netif_set_real_num_tx_queues(dev, dev->num_tx_queues);
546 ipoib_flush_paths(dev);
547 return (!rtnl_trylock()) ? -EBUSY : 0;
553 struct ipoib_path *__path_find(struct net_device *dev, void *gid)
555 struct ipoib_dev_priv *priv = ipoib_priv(dev);
556 struct rb_node *n = priv->path_tree.rb_node;
557 struct ipoib_path *path;
561 path = rb_entry(n, struct ipoib_path, rb_node);
563 ret = memcmp(gid, path->pathrec.dgid.raw,
564 sizeof (union ib_gid));
577 static int __path_add(struct net_device *dev, struct ipoib_path *path)
579 struct ipoib_dev_priv *priv = ipoib_priv(dev);
580 struct rb_node **n = &priv->path_tree.rb_node;
581 struct rb_node *pn = NULL;
582 struct ipoib_path *tpath;
587 tpath = rb_entry(pn, struct ipoib_path, rb_node);
589 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
590 sizeof (union ib_gid));
599 rb_link_node(&path->rb_node, pn, n);
600 rb_insert_color(&path->rb_node, &priv->path_tree);
602 list_add_tail(&path->list, &priv->path_list);
607 static void path_free(struct net_device *dev, struct ipoib_path *path)
611 while ((skb = __skb_dequeue(&path->queue)))
612 dev_kfree_skb_irq(skb);
614 ipoib_dbg(ipoib_priv(dev), "%s\n", __func__);
616 /* remove all neigh connected to this path */
617 ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
620 ipoib_put_ah(path->ah);
625 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
627 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
629 struct ipoib_path_iter *iter;
631 iter = kmalloc(sizeof(*iter), GFP_KERNEL);
636 memset(iter->path.pathrec.dgid.raw, 0, 16);
638 if (ipoib_path_iter_next(iter)) {
646 int ipoib_path_iter_next(struct ipoib_path_iter *iter)
648 struct ipoib_dev_priv *priv = ipoib_priv(iter->dev);
650 struct ipoib_path *path;
653 spin_lock_irq(&priv->lock);
655 n = rb_first(&priv->path_tree);
658 path = rb_entry(n, struct ipoib_path, rb_node);
660 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
661 sizeof (union ib_gid)) < 0) {
670 spin_unlock_irq(&priv->lock);
675 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
676 struct ipoib_path *path)
681 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
683 void ipoib_mark_paths_invalid(struct net_device *dev)
685 struct ipoib_dev_priv *priv = ipoib_priv(dev);
686 struct ipoib_path *path, *tp;
688 spin_lock_irq(&priv->lock);
690 list_for_each_entry_safe(path, tp, &priv->path_list, list) {
691 ipoib_dbg(priv, "mark path LID 0x%08x GID %pI6 invalid\n",
692 be32_to_cpu(sa_path_get_dlid(&path->pathrec)),
693 path->pathrec.dgid.raw);
698 spin_unlock_irq(&priv->lock);
701 static void push_pseudo_header(struct sk_buff *skb, const char *daddr)
703 struct ipoib_pseudo_header *phdr;
705 phdr = skb_push(skb, sizeof(*phdr));
706 memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
709 void ipoib_flush_paths(struct net_device *dev)
711 struct ipoib_dev_priv *priv = ipoib_priv(dev);
712 struct ipoib_path *path, *tp;
713 LIST_HEAD(remove_list);
716 netif_tx_lock_bh(dev);
717 spin_lock_irqsave(&priv->lock, flags);
719 list_splice_init(&priv->path_list, &remove_list);
721 list_for_each_entry(path, &remove_list, list)
722 rb_erase(&path->rb_node, &priv->path_tree);
724 list_for_each_entry_safe(path, tp, &remove_list, list) {
726 ib_sa_cancel_query(path->query_id, path->query);
727 spin_unlock_irqrestore(&priv->lock, flags);
728 netif_tx_unlock_bh(dev);
729 wait_for_completion(&path->done);
730 path_free(dev, path);
731 netif_tx_lock_bh(dev);
732 spin_lock_irqsave(&priv->lock, flags);
735 spin_unlock_irqrestore(&priv->lock, flags);
736 netif_tx_unlock_bh(dev);
739 static void path_rec_completion(int status,
740 struct sa_path_rec *pathrec,
743 struct ipoib_path *path = path_ptr;
744 struct net_device *dev = path->dev;
745 struct ipoib_dev_priv *priv = ipoib_priv(dev);
746 struct ipoib_ah *ah = NULL;
747 struct ipoib_ah *old_ah = NULL;
748 struct ipoib_neigh *neigh, *tn;
749 struct sk_buff_head skqueue;
754 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n",
755 be32_to_cpu(sa_path_get_dlid(pathrec)),
758 ipoib_dbg(priv, "PathRec status %d for GID %pI6\n",
759 status, path->pathrec.dgid.raw);
761 skb_queue_head_init(&skqueue);
764 struct rdma_ah_attr av;
766 if (!ib_init_ah_attr_from_path(priv->ca, priv->port,
767 pathrec, &av, NULL)) {
768 ah = ipoib_create_ah(dev, priv->pd, &av);
769 rdma_destroy_ah_attr(&av);
773 spin_lock_irqsave(&priv->lock, flags);
775 if (!IS_ERR_OR_NULL(ah)) {
777 * pathrec.dgid is used as the database key from the LLADDR,
778 * it must remain unchanged even if the SA returns a different
779 * GID to use in the AH.
781 if (memcmp(pathrec->dgid.raw, path->pathrec.dgid.raw,
782 sizeof(union ib_gid))) {
785 "%s got PathRec for gid %pI6 while asked for %pI6\n",
786 dev->name, pathrec->dgid.raw,
787 path->pathrec.dgid.raw);
788 memcpy(pathrec->dgid.raw, path->pathrec.dgid.raw,
789 sizeof(union ib_gid));
792 path->pathrec = *pathrec;
797 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
798 ah, be32_to_cpu(sa_path_get_dlid(pathrec)),
801 while ((skb = __skb_dequeue(&path->queue)))
802 __skb_queue_tail(&skqueue, skb);
804 list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
806 WARN_ON(neigh->ah != old_ah);
808 * Dropping the ah reference inside
809 * priv->lock is safe here, because we
810 * will hold one more reference from
811 * the original value of path->ah (ie
814 ipoib_put_ah(neigh->ah);
816 kref_get(&path->ah->ref);
817 neigh->ah = path->ah;
819 if (ipoib_cm_enabled(dev, neigh->daddr)) {
820 if (!ipoib_cm_get(neigh))
821 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev,
824 if (!ipoib_cm_get(neigh)) {
825 ipoib_neigh_free(neigh);
830 while ((skb = __skb_dequeue(&neigh->queue)))
831 __skb_queue_tail(&skqueue, skb);
837 complete(&path->done);
839 spin_unlock_irqrestore(&priv->lock, flags);
841 if (IS_ERR_OR_NULL(ah))
842 ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
845 ipoib_put_ah(old_ah);
847 while ((skb = __skb_dequeue(&skqueue))) {
850 ret = dev_queue_xmit(skb);
852 ipoib_warn(priv, "%s: dev_queue_xmit failed to re-queue packet, ret:%d\n",
857 static void init_path_rec(struct ipoib_dev_priv *priv, struct ipoib_path *path,
860 path->dev = priv->dev;
862 if (rdma_cap_opa_ah(priv->ca, priv->port))
863 path->pathrec.rec_type = SA_PATH_REC_TYPE_OPA;
865 path->pathrec.rec_type = SA_PATH_REC_TYPE_IB;
867 memcpy(path->pathrec.dgid.raw, gid, sizeof(union ib_gid));
868 path->pathrec.sgid = priv->local_gid;
869 path->pathrec.pkey = cpu_to_be16(priv->pkey);
870 path->pathrec.numb_path = 1;
871 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
874 static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
876 struct ipoib_dev_priv *priv = ipoib_priv(dev);
877 struct ipoib_path *path;
879 if (!priv->broadcast)
882 path = kzalloc(sizeof(*path), GFP_ATOMIC);
886 skb_queue_head_init(&path->queue);
888 INIT_LIST_HEAD(&path->neigh_list);
890 init_path_rec(priv, path, gid);
895 static int path_rec_start(struct net_device *dev,
896 struct ipoib_path *path)
898 struct ipoib_dev_priv *priv = ipoib_priv(dev);
900 ipoib_dbg(priv, "Start path record lookup for %pI6\n",
901 path->pathrec.dgid.raw);
903 init_completion(&path->done);
906 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
908 IB_SA_PATH_REC_DGID |
909 IB_SA_PATH_REC_SGID |
910 IB_SA_PATH_REC_NUMB_PATH |
911 IB_SA_PATH_REC_TRAFFIC_CLASS |
916 if (path->query_id < 0) {
917 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
919 complete(&path->done);
920 return path->query_id;
926 static void neigh_refresh_path(struct ipoib_neigh *neigh, u8 *daddr,
927 struct net_device *dev)
929 struct ipoib_dev_priv *priv = ipoib_priv(dev);
930 struct ipoib_path *path;
933 spin_lock_irqsave(&priv->lock, flags);
935 path = __path_find(dev, daddr + 4);
939 path_rec_start(dev, path);
941 spin_unlock_irqrestore(&priv->lock, flags);
944 static struct ipoib_neigh *neigh_add_path(struct sk_buff *skb, u8 *daddr,
945 struct net_device *dev)
947 struct ipoib_dev_priv *priv = ipoib_priv(dev);
948 struct rdma_netdev *rn = netdev_priv(dev);
949 struct ipoib_path *path;
950 struct ipoib_neigh *neigh;
953 spin_lock_irqsave(&priv->lock, flags);
954 neigh = ipoib_neigh_alloc(daddr, dev);
956 spin_unlock_irqrestore(&priv->lock, flags);
957 ++dev->stats.tx_dropped;
958 dev_kfree_skb_any(skb);
962 /* To avoid race condition, make sure that the
963 * neigh will be added only once.
965 if (unlikely(!list_empty(&neigh->list))) {
966 spin_unlock_irqrestore(&priv->lock, flags);
970 path = __path_find(dev, daddr + 4);
972 path = path_rec_create(dev, daddr + 4);
976 __path_add(dev, path);
979 list_add_tail(&neigh->list, &path->neigh_list);
981 if (path->ah && path->ah->valid) {
982 kref_get(&path->ah->ref);
983 neigh->ah = path->ah;
985 if (ipoib_cm_enabled(dev, neigh->daddr)) {
986 if (!ipoib_cm_get(neigh))
987 ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh));
988 if (!ipoib_cm_get(neigh)) {
989 ipoib_neigh_free(neigh);
992 if (skb_queue_len(&neigh->queue) <
993 IPOIB_MAX_PATH_REC_QUEUE) {
994 push_pseudo_header(skb, neigh->daddr);
995 __skb_queue_tail(&neigh->queue, skb);
997 ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
998 skb_queue_len(&neigh->queue));
1002 spin_unlock_irqrestore(&priv->lock, flags);
1003 path->ah->last_send = rn->send(dev, skb, path->ah->ah,
1005 ipoib_neigh_put(neigh);
1011 if (!path->query && path_rec_start(dev, path))
1013 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
1014 push_pseudo_header(skb, neigh->daddr);
1015 __skb_queue_tail(&neigh->queue, skb);
1021 spin_unlock_irqrestore(&priv->lock, flags);
1022 ipoib_neigh_put(neigh);
1026 ipoib_neigh_free(neigh);
1028 ++dev->stats.tx_dropped;
1029 dev_kfree_skb_any(skb);
1031 spin_unlock_irqrestore(&priv->lock, flags);
1032 ipoib_neigh_put(neigh);
1037 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
1038 struct ipoib_pseudo_header *phdr)
1040 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1041 struct rdma_netdev *rn = netdev_priv(dev);
1042 struct ipoib_path *path;
1043 unsigned long flags;
1045 spin_lock_irqsave(&priv->lock, flags);
1047 /* no broadcast means that all paths are (going to be) not valid */
1048 if (!priv->broadcast)
1049 goto drop_and_unlock;
1051 path = __path_find(dev, phdr->hwaddr + 4);
1052 if (!path || !path->ah || !path->ah->valid) {
1054 path = path_rec_create(dev, phdr->hwaddr + 4);
1056 goto drop_and_unlock;
1057 __path_add(dev, path);
1060 * make sure there are no changes in the existing
1063 init_path_rec(priv, path, phdr->hwaddr + 4);
1065 if (!path->query && path_rec_start(dev, path)) {
1066 goto drop_and_unlock;
1069 if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
1070 push_pseudo_header(skb, phdr->hwaddr);
1071 __skb_queue_tail(&path->queue, skb);
1074 goto drop_and_unlock;
1078 spin_unlock_irqrestore(&priv->lock, flags);
1079 ipoib_dbg(priv, "Send unicast ARP to %08x\n",
1080 be32_to_cpu(sa_path_get_dlid(&path->pathrec)));
1081 path->ah->last_send = rn->send(dev, skb, path->ah->ah,
1082 IPOIB_QPN(phdr->hwaddr));
1086 ++dev->stats.tx_dropped;
1087 dev_kfree_skb_any(skb);
1089 spin_unlock_irqrestore(&priv->lock, flags);
1092 static netdev_tx_t ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
1094 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1095 struct rdma_netdev *rn = netdev_priv(dev);
1096 struct ipoib_neigh *neigh;
1097 struct ipoib_pseudo_header *phdr;
1098 struct ipoib_header *header;
1099 unsigned long flags;
1101 phdr = (struct ipoib_pseudo_header *) skb->data;
1102 skb_pull(skb, sizeof(*phdr));
1103 header = (struct ipoib_header *) skb->data;
1105 if (unlikely(phdr->hwaddr[4] == 0xff)) {
1106 /* multicast, arrange "if" according to probability */
1107 if ((header->proto != htons(ETH_P_IP)) &&
1108 (header->proto != htons(ETH_P_IPV6)) &&
1109 (header->proto != htons(ETH_P_ARP)) &&
1110 (header->proto != htons(ETH_P_RARP)) &&
1111 (header->proto != htons(ETH_P_TIPC))) {
1112 /* ethertype not supported by IPoIB */
1113 ++dev->stats.tx_dropped;
1114 dev_kfree_skb_any(skb);
1115 return NETDEV_TX_OK;
1117 /* Add in the P_Key for multicast*/
1118 phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
1119 phdr->hwaddr[9] = priv->pkey & 0xff;
1121 neigh = ipoib_neigh_get(dev, phdr->hwaddr);
1123 goto send_using_neigh;
1124 ipoib_mcast_send(dev, phdr->hwaddr, skb);
1125 return NETDEV_TX_OK;
1128 /* unicast, arrange "switch" according to probability */
1129 switch (header->proto) {
1130 case htons(ETH_P_IP):
1131 case htons(ETH_P_IPV6):
1132 case htons(ETH_P_TIPC):
1133 neigh = ipoib_neigh_get(dev, phdr->hwaddr);
1134 if (unlikely(!neigh)) {
1135 neigh = neigh_add_path(skb, phdr->hwaddr, dev);
1137 return NETDEV_TX_OK;
1140 case htons(ETH_P_ARP):
1141 case htons(ETH_P_RARP):
1142 /* for unicast ARP and RARP should always perform path find */
1143 unicast_arp_send(skb, dev, phdr);
1144 return NETDEV_TX_OK;
1146 /* ethertype not supported by IPoIB */
1147 ++dev->stats.tx_dropped;
1148 dev_kfree_skb_any(skb);
1149 return NETDEV_TX_OK;
1153 /* note we now hold a ref to neigh */
1154 if (ipoib_cm_get(neigh)) {
1155 if (ipoib_cm_up(neigh)) {
1156 ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
1159 } else if (neigh->ah && neigh->ah->valid) {
1160 neigh->ah->last_send = rn->send(dev, skb, neigh->ah->ah,
1161 IPOIB_QPN(phdr->hwaddr));
1163 } else if (neigh->ah) {
1164 neigh_refresh_path(neigh, phdr->hwaddr, dev);
1167 if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
1168 push_pseudo_header(skb, phdr->hwaddr);
1169 spin_lock_irqsave(&priv->lock, flags);
1170 __skb_queue_tail(&neigh->queue, skb);
1171 spin_unlock_irqrestore(&priv->lock, flags);
1173 ++dev->stats.tx_dropped;
1174 dev_kfree_skb_any(skb);
1178 ipoib_neigh_put(neigh);
1180 return NETDEV_TX_OK;
1183 static void ipoib_timeout(struct net_device *dev, unsigned int txqueue)
1185 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1187 ipoib_warn(priv, "transmit timeout: latency %d msecs\n",
1188 jiffies_to_msecs(jiffies - dev_trans_start(dev)));
1190 "queue stopped %d, tx_head %u, tx_tail %u, global_tx_head %u, global_tx_tail %u\n",
1191 netif_queue_stopped(dev), priv->tx_head, priv->tx_tail,
1192 priv->global_tx_head, priv->global_tx_tail);
1194 /* XXX reset QP, etc. */
1197 static int ipoib_hard_header(struct sk_buff *skb,
1198 struct net_device *dev,
1199 unsigned short type,
1204 struct ipoib_header *header;
1206 header = skb_push(skb, sizeof(*header));
1208 header->proto = htons(type);
1209 header->reserved = 0;
1212 * we don't rely on dst_entry structure, always stuff the
1213 * destination address into skb hard header so we can figure out where
1214 * to send the packet later.
1216 push_pseudo_header(skb, daddr);
1218 return IPOIB_HARD_LEN;
1221 static void ipoib_set_mcast_list(struct net_device *dev)
1223 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1225 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
1226 ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set");
1230 queue_work(priv->wq, &priv->restart_task);
1233 static int ipoib_get_iflink(const struct net_device *dev)
1235 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1237 /* parent interface */
1238 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
1239 return dev->ifindex;
1241 /* child/vlan interface */
1242 return priv->parent->ifindex;
1245 static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr)
1248 * Use only the address parts that contributes to spreading
1249 * The subnet prefix is not used as one can not connect to
1250 * same remote port (GUID) using the same remote QPN via two
1251 * different subnets.
1253 /* qpn octets[1:4) & port GUID octets[12:20) */
1254 u32 *d32 = (u32 *) daddr;
1257 hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0);
1258 return hv & htbl->mask;
1261 struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr)
1263 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1264 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1265 struct ipoib_neigh_hash *htbl;
1266 struct ipoib_neigh *neigh = NULL;
1271 htbl = rcu_dereference_bh(ntbl->htbl);
1276 hash_val = ipoib_addr_hash(htbl, daddr);
1277 for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]);
1279 neigh = rcu_dereference_bh(neigh->hnext)) {
1280 if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
1281 /* found, take one ref on behalf of the caller */
1282 if (!atomic_inc_not_zero(&neigh->refcnt)) {
1288 if (likely(skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE))
1289 neigh->alive = jiffies;
1295 rcu_read_unlock_bh();
1299 static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
1301 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1302 struct ipoib_neigh_hash *htbl;
1303 unsigned long neigh_obsolete;
1305 unsigned long flags;
1307 LIST_HEAD(remove_list);
1309 spin_lock_irqsave(&priv->lock, flags);
1311 htbl = rcu_dereference_protected(ntbl->htbl,
1312 lockdep_is_held(&priv->lock));
1317 /* neigh is obsolete if it was idle for two GC periods */
1318 dt = 2 * arp_tbl.gc_interval;
1319 neigh_obsolete = jiffies - dt;
1321 for (i = 0; i < htbl->size; i++) {
1322 struct ipoib_neigh *neigh;
1323 struct ipoib_neigh __rcu **np = &htbl->buckets[i];
1325 while ((neigh = rcu_dereference_protected(*np,
1326 lockdep_is_held(&priv->lock))) != NULL) {
1327 /* was the neigh idle for two GC periods */
1328 if (time_after(neigh_obsolete, neigh->alive)) {
1330 ipoib_check_and_add_mcast_sendonly(priv, neigh->daddr + 4, &remove_list);
1332 rcu_assign_pointer(*np,
1333 rcu_dereference_protected(neigh->hnext,
1334 lockdep_is_held(&priv->lock)));
1335 /* remove from path/mc list */
1336 list_del_init(&neigh->list);
1337 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1346 spin_unlock_irqrestore(&priv->lock, flags);
1347 ipoib_mcast_remove_list(&remove_list);
1350 static void ipoib_reap_neigh(struct work_struct *work)
1352 struct ipoib_dev_priv *priv =
1353 container_of(work, struct ipoib_dev_priv, neigh_reap_task.work);
1355 __ipoib_reap_neigh(priv);
1357 queue_delayed_work(priv->wq, &priv->neigh_reap_task,
1358 arp_tbl.gc_interval);
1362 static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr,
1363 struct net_device *dev)
1365 struct ipoib_neigh *neigh;
1367 neigh = kzalloc(sizeof(*neigh), GFP_ATOMIC);
1372 memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr));
1373 skb_queue_head_init(&neigh->queue);
1374 INIT_LIST_HEAD(&neigh->list);
1375 ipoib_cm_set(neigh, NULL);
1376 /* one ref on behalf of the caller */
1377 atomic_set(&neigh->refcnt, 1);
1382 struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
1383 struct net_device *dev)
1385 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1386 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1387 struct ipoib_neigh_hash *htbl;
1388 struct ipoib_neigh *neigh;
1391 htbl = rcu_dereference_protected(ntbl->htbl,
1392 lockdep_is_held(&priv->lock));
1398 /* need to add a new neigh, but maybe some other thread succeeded?
1399 * recalc hash, maybe hash resize took place so we do a search
1401 hash_val = ipoib_addr_hash(htbl, daddr);
1402 for (neigh = rcu_dereference_protected(htbl->buckets[hash_val],
1403 lockdep_is_held(&priv->lock));
1405 neigh = rcu_dereference_protected(neigh->hnext,
1406 lockdep_is_held(&priv->lock))) {
1407 if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
1408 /* found, take one ref on behalf of the caller */
1409 if (!atomic_inc_not_zero(&neigh->refcnt)) {
1414 neigh->alive = jiffies;
1419 neigh = ipoib_neigh_ctor(daddr, dev);
1423 /* one ref on behalf of the hash table */
1424 atomic_inc(&neigh->refcnt);
1425 neigh->alive = jiffies;
1427 rcu_assign_pointer(neigh->hnext,
1428 rcu_dereference_protected(htbl->buckets[hash_val],
1429 lockdep_is_held(&priv->lock)));
1430 rcu_assign_pointer(htbl->buckets[hash_val], neigh);
1431 atomic_inc(&ntbl->entries);
1438 void ipoib_neigh_dtor(struct ipoib_neigh *neigh)
1440 /* neigh reference count was dropprd to zero */
1441 struct net_device *dev = neigh->dev;
1442 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1443 struct sk_buff *skb;
1445 ipoib_put_ah(neigh->ah);
1446 while ((skb = __skb_dequeue(&neigh->queue))) {
1447 ++dev->stats.tx_dropped;
1448 dev_kfree_skb_any(skb);
1450 if (ipoib_cm_get(neigh))
1451 ipoib_cm_destroy_tx(ipoib_cm_get(neigh));
1452 ipoib_dbg(ipoib_priv(dev),
1453 "neigh free for %06x %pI6\n",
1454 IPOIB_QPN(neigh->daddr),
1457 if (atomic_dec_and_test(&priv->ntbl.entries)) {
1458 if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags))
1459 complete(&priv->ntbl.flushed);
1463 static void ipoib_neigh_reclaim(struct rcu_head *rp)
1465 /* Called as a result of removal from hash table */
1466 struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu);
1467 /* note TX context may hold another ref */
1468 ipoib_neigh_put(neigh);
1471 void ipoib_neigh_free(struct ipoib_neigh *neigh)
1473 struct net_device *dev = neigh->dev;
1474 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1475 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1476 struct ipoib_neigh_hash *htbl;
1477 struct ipoib_neigh __rcu **np;
1478 struct ipoib_neigh *n;
1481 htbl = rcu_dereference_protected(ntbl->htbl,
1482 lockdep_is_held(&priv->lock));
1486 hash_val = ipoib_addr_hash(htbl, neigh->daddr);
1487 np = &htbl->buckets[hash_val];
1488 for (n = rcu_dereference_protected(*np,
1489 lockdep_is_held(&priv->lock));
1491 n = rcu_dereference_protected(*np,
1492 lockdep_is_held(&priv->lock))) {
1495 rcu_assign_pointer(*np,
1496 rcu_dereference_protected(neigh->hnext,
1497 lockdep_is_held(&priv->lock)));
1498 /* remove from parent list */
1499 list_del_init(&neigh->list);
1500 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1508 static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv)
1510 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1511 struct ipoib_neigh_hash *htbl;
1512 struct ipoib_neigh __rcu **buckets;
1515 clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
1517 htbl = kzalloc(sizeof(*htbl), GFP_KERNEL);
1520 size = roundup_pow_of_two(arp_tbl.gc_thresh3);
1521 buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL);
1527 htbl->mask = (size - 1);
1528 htbl->buckets = buckets;
1529 RCU_INIT_POINTER(ntbl->htbl, htbl);
1531 atomic_set(&ntbl->entries, 0);
1533 /* start garbage collection */
1534 queue_delayed_work(priv->wq, &priv->neigh_reap_task,
1535 arp_tbl.gc_interval);
1540 static void neigh_hash_free_rcu(struct rcu_head *head)
1542 struct ipoib_neigh_hash *htbl = container_of(head,
1543 struct ipoib_neigh_hash,
1545 struct ipoib_neigh __rcu **buckets = htbl->buckets;
1546 struct ipoib_neigh_table *ntbl = htbl->ntbl;
1550 complete(&ntbl->deleted);
1553 void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid)
1555 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1556 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1557 struct ipoib_neigh_hash *htbl;
1558 unsigned long flags;
1561 /* remove all neigh connected to a given path or mcast */
1562 spin_lock_irqsave(&priv->lock, flags);
1564 htbl = rcu_dereference_protected(ntbl->htbl,
1565 lockdep_is_held(&priv->lock));
1570 for (i = 0; i < htbl->size; i++) {
1571 struct ipoib_neigh *neigh;
1572 struct ipoib_neigh __rcu **np = &htbl->buckets[i];
1574 while ((neigh = rcu_dereference_protected(*np,
1575 lockdep_is_held(&priv->lock))) != NULL) {
1576 /* delete neighs belong to this parent */
1577 if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) {
1578 rcu_assign_pointer(*np,
1579 rcu_dereference_protected(neigh->hnext,
1580 lockdep_is_held(&priv->lock)));
1581 /* remove from parent list */
1582 list_del_init(&neigh->list);
1583 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1591 spin_unlock_irqrestore(&priv->lock, flags);
1594 static void ipoib_flush_neighs(struct ipoib_dev_priv *priv)
1596 struct ipoib_neigh_table *ntbl = &priv->ntbl;
1597 struct ipoib_neigh_hash *htbl;
1598 unsigned long flags;
1599 int i, wait_flushed = 0;
1601 init_completion(&priv->ntbl.flushed);
1602 set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
1604 spin_lock_irqsave(&priv->lock, flags);
1606 htbl = rcu_dereference_protected(ntbl->htbl,
1607 lockdep_is_held(&priv->lock));
1611 wait_flushed = atomic_read(&priv->ntbl.entries);
1615 for (i = 0; i < htbl->size; i++) {
1616 struct ipoib_neigh *neigh;
1617 struct ipoib_neigh __rcu **np = &htbl->buckets[i];
1619 while ((neigh = rcu_dereference_protected(*np,
1620 lockdep_is_held(&priv->lock))) != NULL) {
1621 rcu_assign_pointer(*np,
1622 rcu_dereference_protected(neigh->hnext,
1623 lockdep_is_held(&priv->lock)));
1624 /* remove from path/mc list */
1625 list_del_init(&neigh->list);
1626 call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
1631 rcu_assign_pointer(ntbl->htbl, NULL);
1632 call_rcu(&htbl->rcu, neigh_hash_free_rcu);
1635 spin_unlock_irqrestore(&priv->lock, flags);
1637 wait_for_completion(&priv->ntbl.flushed);
1640 static void ipoib_neigh_hash_uninit(struct net_device *dev)
1642 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1644 ipoib_dbg(priv, "%s\n", __func__);
1645 init_completion(&priv->ntbl.deleted);
1647 cancel_delayed_work_sync(&priv->neigh_reap_task);
1649 ipoib_flush_neighs(priv);
1651 wait_for_completion(&priv->ntbl.deleted);
1654 static void ipoib_napi_add(struct net_device *dev)
1656 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1658 netif_napi_add(dev, &priv->recv_napi, ipoib_rx_poll, IPOIB_NUM_WC);
1659 netif_napi_add(dev, &priv->send_napi, ipoib_tx_poll, MAX_SEND_CQE);
1662 static void ipoib_napi_del(struct net_device *dev)
1664 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1666 netif_napi_del(&priv->recv_napi);
1667 netif_napi_del(&priv->send_napi);
1670 static void ipoib_dev_uninit_default(struct net_device *dev)
1672 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1674 ipoib_transport_dev_cleanup(dev);
1676 ipoib_napi_del(dev);
1678 ipoib_cm_dev_cleanup(dev);
1680 kfree(priv->rx_ring);
1681 vfree(priv->tx_ring);
1683 priv->rx_ring = NULL;
1684 priv->tx_ring = NULL;
1687 static int ipoib_dev_init_default(struct net_device *dev)
1689 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1691 ipoib_napi_add(dev);
1693 /* Allocate RX/TX "rings" to hold queued skbs */
1694 priv->rx_ring = kcalloc(ipoib_recvq_size,
1695 sizeof(*priv->rx_ring),
1700 priv->tx_ring = vzalloc(array_size(ipoib_sendq_size,
1701 sizeof(*priv->tx_ring)));
1702 if (!priv->tx_ring) {
1703 pr_warn("%s: failed to allocate TX ring (%d entries)\n",
1704 priv->ca->name, ipoib_sendq_size);
1705 goto out_rx_ring_cleanup;
1708 /* priv->tx_head, tx_tail and global_tx_tail/head are already 0 */
1710 if (ipoib_transport_dev_init(dev, priv->ca)) {
1711 pr_warn("%s: ipoib_transport_dev_init failed\n",
1713 goto out_tx_ring_cleanup;
1716 /* after qp created set dev address */
1717 priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
1718 priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
1719 priv->dev->dev_addr[3] = (priv->qp->qp_num) & 0xff;
1723 out_tx_ring_cleanup:
1724 vfree(priv->tx_ring);
1726 out_rx_ring_cleanup:
1727 kfree(priv->rx_ring);
1730 ipoib_napi_del(dev);
1734 static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr,
1737 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1739 if (!priv->rn_ops->ndo_do_ioctl)
1742 return priv->rn_ops->ndo_do_ioctl(dev, ifr, cmd);
1745 static int ipoib_dev_init(struct net_device *dev)
1747 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1753 * the various IPoIB tasks assume they will never race against
1754 * themselves, so always use a single thread workqueue
1756 priv->wq = alloc_ordered_workqueue("ipoib_wq", WQ_MEM_RECLAIM);
1758 pr_warn("%s: failed to allocate device WQ\n", dev->name);
1762 /* create pd, which used both for control and datapath*/
1763 priv->pd = ib_alloc_pd(priv->ca, 0);
1764 if (IS_ERR(priv->pd)) {
1765 pr_warn("%s: failed to allocate PD\n", priv->ca->name);
1769 ret = priv->rn_ops->ndo_init(dev);
1771 pr_warn("%s failed to init HW resource\n", dev->name);
1775 ret = ipoib_neigh_hash_init(priv);
1777 pr_warn("%s failed to init neigh hash\n", dev->name);
1778 goto out_dev_uninit;
1781 if (dev->flags & IFF_UP) {
1782 if (ipoib_ib_dev_open(dev)) {
1783 pr_warn("%s failed to open device\n", dev->name);
1785 goto out_hash_uninit;
1792 ipoib_neigh_hash_uninit(dev);
1795 ipoib_ib_dev_cleanup(dev);
1799 ib_dealloc_pd(priv->pd);
1805 destroy_workqueue(priv->wq);
1814 * This must be called before doing an unregister_netdev on a parent device to
1815 * shutdown the IB event handler.
1817 static void ipoib_parent_unregister_pre(struct net_device *ndev)
1819 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1822 * ipoib_set_mac checks netif_running before pushing work, clearing
1823 * running ensures the it will not add more work.
1826 dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP, NULL);
1829 /* ipoib_event() cannot be running once this returns */
1830 ib_unregister_event_handler(&priv->event_handler);
1833 * Work on the queue grabs the rtnl lock, so this cannot be done while
1836 flush_workqueue(ipoib_workqueue);
1839 static void ipoib_set_dev_features(struct ipoib_dev_priv *priv)
1841 priv->hca_caps = priv->ca->attrs.device_cap_flags;
1843 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
1844 priv->dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1846 if (priv->hca_caps & IB_DEVICE_UD_TSO)
1847 priv->dev->hw_features |= NETIF_F_TSO;
1849 priv->dev->features |= priv->dev->hw_features;
1853 static int ipoib_parent_init(struct net_device *ndev)
1855 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1856 struct ib_port_attr attr;
1859 result = ib_query_port(priv->ca, priv->port, &attr);
1861 pr_warn("%s: ib_query_port %d failed\n", priv->ca->name,
1865 priv->max_ib_mtu = rdma_mtu_from_attr(priv->ca, priv->port, &attr);
1867 result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey);
1869 pr_warn("%s: ib_query_pkey port %d failed (ret = %d)\n",
1870 priv->ca->name, priv->port, result);
1874 result = rdma_query_gid(priv->ca, priv->port, 0, &priv->local_gid);
1876 pr_warn("%s: rdma_query_gid port %d failed (ret = %d)\n",
1877 priv->ca->name, priv->port, result);
1880 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw,
1881 sizeof(union ib_gid));
1883 SET_NETDEV_DEV(priv->dev, priv->ca->dev.parent);
1884 priv->dev->dev_port = priv->port - 1;
1885 /* Let's set this one too for backwards compatibility. */
1886 priv->dev->dev_id = priv->port - 1;
1891 static void ipoib_child_init(struct net_device *ndev)
1893 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1894 struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
1896 priv->max_ib_mtu = ppriv->max_ib_mtu;
1897 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
1898 if (memchr_inv(priv->dev->dev_addr, 0, INFINIBAND_ALEN))
1899 memcpy(&priv->local_gid, priv->dev->dev_addr + 4,
1900 sizeof(priv->local_gid));
1902 memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr,
1904 memcpy(&priv->local_gid, &ppriv->local_gid,
1905 sizeof(priv->local_gid));
1909 static int ipoib_ndo_init(struct net_device *ndev)
1911 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
1913 struct rdma_netdev *rn = netdev_priv(ndev);
1916 ipoib_child_init(ndev);
1918 rc = ipoib_parent_init(ndev);
1923 /* MTU will be reset when mcast join happens */
1924 ndev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
1925 priv->mcast_mtu = priv->admin_mtu = ndev->mtu;
1926 rn->mtu = priv->mcast_mtu;
1927 ndev->max_mtu = IPOIB_CM_MTU;
1929 ndev->neigh_priv_len = sizeof(struct ipoib_neigh);
1932 * Set the full membership bit, so that we join the right
1933 * broadcast group, etc.
1935 priv->pkey |= 0x8000;
1937 ndev->broadcast[8] = priv->pkey >> 8;
1938 ndev->broadcast[9] = priv->pkey & 0xff;
1939 set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
1941 ipoib_set_dev_features(priv);
1943 rc = ipoib_dev_init(ndev);
1945 pr_warn("%s: failed to initialize device: %s port %d (ret = %d)\n",
1946 priv->ca->name, priv->dev->name, priv->port, rc);
1951 struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
1953 dev_hold(priv->parent);
1955 down_write(&ppriv->vlan_rwsem);
1956 list_add_tail(&priv->list, &ppriv->child_intfs);
1957 up_write(&ppriv->vlan_rwsem);
1963 static void ipoib_ndo_uninit(struct net_device *dev)
1965 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1970 * ipoib_remove_one guarantees the children are removed before the
1971 * parent, and that is the only place where a parent can be removed.
1973 WARN_ON(!list_empty(&priv->child_intfs));
1976 struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
1978 down_write(&ppriv->vlan_rwsem);
1979 list_del(&priv->list);
1980 up_write(&ppriv->vlan_rwsem);
1983 ipoib_neigh_hash_uninit(dev);
1985 ipoib_ib_dev_cleanup(dev);
1987 /* no more works over the priv->wq */
1989 /* See ipoib_mcast_carrier_on_task() */
1990 WARN_ON(test_bit(IPOIB_FLAG_OPER_UP, &priv->flags));
1991 flush_workqueue(priv->wq);
1992 destroy_workqueue(priv->wq);
1997 dev_put(priv->parent);
2000 static int ipoib_set_vf_link_state(struct net_device *dev, int vf, int link_state)
2002 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2004 return ib_set_vf_link_state(priv->ca, vf, priv->port, link_state);
2007 static int ipoib_get_vf_config(struct net_device *dev, int vf,
2008 struct ifla_vf_info *ivf)
2010 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2013 err = ib_get_vf_config(priv->ca, vf, priv->port, ivf);
2018 memcpy(ivf->mac, dev->dev_addr, dev->addr_len);
2023 static int ipoib_set_vf_guid(struct net_device *dev, int vf, u64 guid, int type)
2025 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2027 if (type != IFLA_VF_IB_NODE_GUID && type != IFLA_VF_IB_PORT_GUID)
2030 return ib_set_vf_guid(priv->ca, vf, priv->port, guid, type);
2033 static int ipoib_get_vf_guid(struct net_device *dev, int vf,
2034 struct ifla_vf_guid *node_guid,
2035 struct ifla_vf_guid *port_guid)
2037 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2039 return ib_get_vf_guid(priv->ca, vf, priv->port, node_guid, port_guid);
2042 static int ipoib_get_vf_stats(struct net_device *dev, int vf,
2043 struct ifla_vf_stats *vf_stats)
2045 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2047 return ib_get_vf_stats(priv->ca, vf, priv->port, vf_stats);
2050 static const struct header_ops ipoib_header_ops = {
2051 .create = ipoib_hard_header,
2054 static const struct net_device_ops ipoib_netdev_ops_pf = {
2055 .ndo_init = ipoib_ndo_init,
2056 .ndo_uninit = ipoib_ndo_uninit,
2057 .ndo_open = ipoib_open,
2058 .ndo_stop = ipoib_stop,
2059 .ndo_change_mtu = ipoib_change_mtu,
2060 .ndo_fix_features = ipoib_fix_features,
2061 .ndo_start_xmit = ipoib_start_xmit,
2062 .ndo_tx_timeout = ipoib_timeout,
2063 .ndo_set_rx_mode = ipoib_set_mcast_list,
2064 .ndo_get_iflink = ipoib_get_iflink,
2065 .ndo_set_vf_link_state = ipoib_set_vf_link_state,
2066 .ndo_get_vf_config = ipoib_get_vf_config,
2067 .ndo_get_vf_stats = ipoib_get_vf_stats,
2068 .ndo_get_vf_guid = ipoib_get_vf_guid,
2069 .ndo_set_vf_guid = ipoib_set_vf_guid,
2070 .ndo_set_mac_address = ipoib_set_mac,
2071 .ndo_get_stats64 = ipoib_get_stats,
2072 .ndo_do_ioctl = ipoib_ioctl,
2075 static const struct net_device_ops ipoib_netdev_ops_vf = {
2076 .ndo_init = ipoib_ndo_init,
2077 .ndo_uninit = ipoib_ndo_uninit,
2078 .ndo_open = ipoib_open,
2079 .ndo_stop = ipoib_stop,
2080 .ndo_change_mtu = ipoib_change_mtu,
2081 .ndo_fix_features = ipoib_fix_features,
2082 .ndo_start_xmit = ipoib_start_xmit,
2083 .ndo_tx_timeout = ipoib_timeout,
2084 .ndo_set_rx_mode = ipoib_set_mcast_list,
2085 .ndo_get_iflink = ipoib_get_iflink,
2086 .ndo_get_stats64 = ipoib_get_stats,
2087 .ndo_do_ioctl = ipoib_ioctl,
2090 static const struct net_device_ops ipoib_netdev_default_pf = {
2091 .ndo_init = ipoib_dev_init_default,
2092 .ndo_uninit = ipoib_dev_uninit_default,
2093 .ndo_open = ipoib_ib_dev_open_default,
2094 .ndo_stop = ipoib_ib_dev_stop_default,
2097 void ipoib_setup_common(struct net_device *dev)
2099 dev->header_ops = &ipoib_header_ops;
2100 dev->netdev_ops = &ipoib_netdev_default_pf;
2102 ipoib_set_ethtool_ops(dev);
2104 dev->watchdog_timeo = HZ;
2106 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
2108 dev->hard_header_len = IPOIB_HARD_LEN;
2109 dev->addr_len = INFINIBAND_ALEN;
2110 dev->type = ARPHRD_INFINIBAND;
2111 dev->tx_queue_len = ipoib_sendq_size * 2;
2112 dev->features = (NETIF_F_VLAN_CHALLENGED |
2114 netif_keep_dst(dev);
2116 memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
2119 * unregister_netdev always frees the netdev, we use this mode
2120 * consistently to unify all the various unregister paths, including
2121 * those connected to rtnl_link_ops which require it.
2123 dev->needs_free_netdev = true;
2126 static void ipoib_build_priv(struct net_device *dev)
2128 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2131 spin_lock_init(&priv->lock);
2132 init_rwsem(&priv->vlan_rwsem);
2133 mutex_init(&priv->mcast_mutex);
2135 INIT_LIST_HEAD(&priv->path_list);
2136 INIT_LIST_HEAD(&priv->child_intfs);
2137 INIT_LIST_HEAD(&priv->dead_ahs);
2138 INIT_LIST_HEAD(&priv->multicast_list);
2140 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task);
2141 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
2142 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light);
2143 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal);
2144 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy);
2145 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
2146 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
2147 INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh);
2150 static struct net_device *ipoib_alloc_netdev(struct ib_device *hca, u8 port,
2153 struct net_device *dev;
2155 dev = rdma_alloc_netdev(hca, port, RDMA_NETDEV_IPOIB, name,
2156 NET_NAME_UNKNOWN, ipoib_setup_common);
2157 if (!IS_ERR(dev) || PTR_ERR(dev) != -EOPNOTSUPP)
2160 dev = alloc_netdev(sizeof(struct rdma_netdev), name, NET_NAME_UNKNOWN,
2161 ipoib_setup_common);
2163 return ERR_PTR(-ENOMEM);
2167 int ipoib_intf_init(struct ib_device *hca, u8 port, const char *name,
2168 struct net_device *dev)
2170 struct rdma_netdev *rn = netdev_priv(dev);
2171 struct ipoib_dev_priv *priv;
2174 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2181 rc = rdma_init_netdev(hca, port, RDMA_NETDEV_IPOIB, name,
2182 NET_NAME_UNKNOWN, ipoib_setup_common, dev);
2184 if (rc != -EOPNOTSUPP)
2187 rn->send = ipoib_send;
2188 rn->attach_mcast = ipoib_mcast_attach;
2189 rn->detach_mcast = ipoib_mcast_detach;
2193 priv->rn_ops = dev->netdev_ops;
2195 if (hca->attrs.device_cap_flags & IB_DEVICE_VIRTUAL_FUNCTION)
2196 dev->netdev_ops = &ipoib_netdev_ops_vf;
2198 dev->netdev_ops = &ipoib_netdev_ops_pf;
2200 rn->clnt_priv = priv;
2202 * Only the child register_netdev flows can handle priv_destructor
2203 * being set, so we force it to NULL here and handle manually until it
2204 * is safe to turn on.
2206 priv->next_priv_destructor = dev->priv_destructor;
2207 dev->priv_destructor = NULL;
2209 ipoib_build_priv(dev);
2218 struct net_device *ipoib_intf_alloc(struct ib_device *hca, u8 port,
2221 struct net_device *dev;
2224 dev = ipoib_alloc_netdev(hca, port, name);
2228 rc = ipoib_intf_init(hca, port, name, dev);
2235 * Upon success the caller must ensure ipoib_intf_free is called or
2236 * register_netdevice succeed'd and priv_destructor is set to
2242 void ipoib_intf_free(struct net_device *dev)
2244 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2245 struct rdma_netdev *rn = netdev_priv(dev);
2247 dev->priv_destructor = priv->next_priv_destructor;
2248 if (dev->priv_destructor)
2249 dev->priv_destructor(dev);
2252 * There are some error flows around register_netdev failing that may
2253 * attempt to call priv_destructor twice, prevent that from happening.
2255 dev->priv_destructor = NULL;
2257 /* unregister/destroy is very complicated. Make bugs more obvious. */
2258 rn->clnt_priv = NULL;
2263 static ssize_t show_pkey(struct device *dev,
2264 struct device_attribute *attr, char *buf)
2266 struct net_device *ndev = to_net_dev(dev);
2267 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
2269 return sprintf(buf, "0x%04x\n", priv->pkey);
2271 static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
2273 static ssize_t show_umcast(struct device *dev,
2274 struct device_attribute *attr, char *buf)
2276 struct net_device *ndev = to_net_dev(dev);
2277 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
2279 return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags));
2282 void ipoib_set_umcast(struct net_device *ndev, int umcast_val)
2284 struct ipoib_dev_priv *priv = ipoib_priv(ndev);
2286 if (umcast_val > 0) {
2287 set_bit(IPOIB_FLAG_UMCAST, &priv->flags);
2288 ipoib_warn(priv, "ignoring multicast groups joined directly "
2291 clear_bit(IPOIB_FLAG_UMCAST, &priv->flags);
2294 static ssize_t set_umcast(struct device *dev,
2295 struct device_attribute *attr,
2296 const char *buf, size_t count)
2298 unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
2300 ipoib_set_umcast(to_net_dev(dev), umcast_val);
2304 static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast);
2306 int ipoib_add_umcast_attr(struct net_device *dev)
2308 return device_create_file(&dev->dev, &dev_attr_umcast);
2311 static void set_base_guid(struct ipoib_dev_priv *priv, union ib_gid *gid)
2313 struct ipoib_dev_priv *child_priv;
2314 struct net_device *netdev = priv->dev;
2316 netif_addr_lock_bh(netdev);
2318 memcpy(&priv->local_gid.global.interface_id,
2319 &gid->global.interface_id,
2320 sizeof(gid->global.interface_id));
2321 memcpy(netdev->dev_addr + 4, &priv->local_gid, sizeof(priv->local_gid));
2322 clear_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
2324 netif_addr_unlock_bh(netdev);
2326 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
2327 down_read(&priv->vlan_rwsem);
2328 list_for_each_entry(child_priv, &priv->child_intfs, list)
2329 set_base_guid(child_priv, gid);
2330 up_read(&priv->vlan_rwsem);
2334 static int ipoib_check_lladdr(struct net_device *dev,
2335 struct sockaddr_storage *ss)
2337 union ib_gid *gid = (union ib_gid *)(ss->__data + 4);
2340 netif_addr_lock_bh(dev);
2342 /* Make sure the QPN, reserved and subnet prefix match the current
2343 * lladdr, it also makes sure the lladdr is unicast.
2345 if (memcmp(dev->dev_addr, ss->__data,
2346 4 + sizeof(gid->global.subnet_prefix)) ||
2347 gid->global.interface_id == 0)
2350 netif_addr_unlock_bh(dev);
2355 static int ipoib_set_mac(struct net_device *dev, void *addr)
2357 struct ipoib_dev_priv *priv = ipoib_priv(dev);
2358 struct sockaddr_storage *ss = addr;
2361 if (!(dev->priv_flags & IFF_LIVE_ADDR_CHANGE) && netif_running(dev))
2364 ret = ipoib_check_lladdr(dev, ss);
2368 set_base_guid(priv, (union ib_gid *)(ss->__data + 4));
2370 queue_work(ipoib_workqueue, &priv->flush_light);
2375 static ssize_t create_child(struct device *dev,
2376 struct device_attribute *attr,
2377 const char *buf, size_t count)
2382 if (sscanf(buf, "%i", &pkey) != 1)
2385 if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000)
2388 ret = ipoib_vlan_add(to_net_dev(dev), pkey);
2390 return ret ? ret : count;
2392 static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child);
2394 static ssize_t delete_child(struct device *dev,
2395 struct device_attribute *attr,
2396 const char *buf, size_t count)
2401 if (sscanf(buf, "%i", &pkey) != 1)
2404 if (pkey < 0 || pkey > 0xffff)
2407 ret = ipoib_vlan_delete(to_net_dev(dev), pkey);
2409 return ret ? ret : count;
2412 static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child);
2414 int ipoib_add_pkey_attr(struct net_device *dev)
2416 return device_create_file(&dev->dev, &dev_attr_pkey);
2420 * We erroneously exposed the iface's port number in the dev_id
2421 * sysfs field long after dev_port was introduced for that purpose[1],
2422 * and we need to stop everyone from relying on that.
2423 * Let's overload the shower routine for the dev_id file here
2424 * to gently bring the issue up.
2426 * [1] https://www.spinics.net/lists/netdev/msg272123.html
2428 static ssize_t dev_id_show(struct device *dev,
2429 struct device_attribute *attr, char *buf)
2431 struct net_device *ndev = to_net_dev(dev);
2434 * ndev->dev_port will be equal to 0 in old kernel prior to commit
2435 * 9b8b2a323008 ("IB/ipoib: Use dev_port to expose network interface
2436 * port numbers") Zero was chosen as special case for user space
2437 * applications to fallback and query dev_id to check if it has
2438 * different value or not.
2440 * Don't print warning in such scenario.
2442 * https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c#L358
2444 if (ndev->dev_port && ndev->dev_id == ndev->dev_port)
2445 netdev_info_once(ndev,
2446 "\"%s\" wants to know my dev_id. Should it look at dev_port instead? See Documentation/ABI/testing/sysfs-class-net for more info.\n",
2449 return sprintf(buf, "%#x\n", ndev->dev_id);
2451 static DEVICE_ATTR_RO(dev_id);
2453 static int ipoib_intercept_dev_id_attr(struct net_device *dev)
2455 device_remove_file(&dev->dev, &dev_attr_dev_id);
2456 return device_create_file(&dev->dev, &dev_attr_dev_id);
2459 static struct net_device *ipoib_add_port(const char *format,
2460 struct ib_device *hca, u8 port)
2462 struct rtnl_link_ops *ops = ipoib_get_link_ops();
2463 struct rdma_netdev_alloc_params params;
2464 struct ipoib_dev_priv *priv;
2465 struct net_device *ndev;
2468 ndev = ipoib_intf_alloc(hca, port, format);
2470 pr_warn("%s, %d: ipoib_intf_alloc failed %ld\n", hca->name, port,
2474 priv = ipoib_priv(ndev);
2476 INIT_IB_EVENT_HANDLER(&priv->event_handler,
2477 priv->ca, ipoib_event);
2478 ib_register_event_handler(&priv->event_handler);
2480 /* call event handler to ensure pkey in sync */
2481 queue_work(ipoib_workqueue, &priv->flush_heavy);
2483 ndev->rtnl_link_ops = ipoib_get_link_ops();
2485 result = register_netdev(ndev);
2487 pr_warn("%s: couldn't register ipoib port %d; error %d\n",
2488 hca->name, port, result);
2490 ipoib_parent_unregister_pre(ndev);
2491 ipoib_intf_free(ndev);
2494 return ERR_PTR(result);
2497 if (hca->ops.rdma_netdev_get_params) {
2498 int rc = hca->ops.rdma_netdev_get_params(hca, port,
2502 if (!rc && ops->priv_size < params.sizeof_priv)
2503 ops->priv_size = params.sizeof_priv;
2506 * We cannot set priv_destructor before register_netdev because we
2507 * need priv to be always valid during the error flow to execute
2508 * ipoib_parent_unregister_pre(). Instead handle it manually and only
2509 * enter priv_destructor mode once we are completely registered.
2511 ndev->priv_destructor = ipoib_intf_free;
2513 if (ipoib_intercept_dev_id_attr(ndev))
2515 if (ipoib_cm_add_mode_attr(ndev))
2517 if (ipoib_add_pkey_attr(ndev))
2519 if (ipoib_add_umcast_attr(ndev))
2521 if (device_create_file(&ndev->dev, &dev_attr_create_child))
2523 if (device_create_file(&ndev->dev, &dev_attr_delete_child))
2529 ipoib_parent_unregister_pre(ndev);
2530 unregister_netdev(ndev);
2531 return ERR_PTR(-ENOMEM);
2534 static int ipoib_add_one(struct ib_device *device)
2536 struct list_head *dev_list;
2537 struct net_device *dev;
2538 struct ipoib_dev_priv *priv;
2542 dev_list = kmalloc(sizeof(*dev_list), GFP_KERNEL);
2546 INIT_LIST_HEAD(dev_list);
2548 rdma_for_each_port (device, p) {
2549 if (!rdma_protocol_ib(device, p))
2551 dev = ipoib_add_port("ib%d", device, p);
2553 priv = ipoib_priv(dev);
2554 list_add_tail(&priv->list, dev_list);
2564 ib_set_client_data(device, &ipoib_client, dev_list);
2568 static void ipoib_remove_one(struct ib_device *device, void *client_data)
2570 struct ipoib_dev_priv *priv, *tmp, *cpriv, *tcpriv;
2571 struct list_head *dev_list = client_data;
2573 list_for_each_entry_safe(priv, tmp, dev_list, list) {
2575 ipoib_parent_unregister_pre(priv->dev);
2579 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs,
2581 unregister_netdevice_queue(cpriv->dev, &head);
2582 unregister_netdevice_queue(priv->dev, &head);
2583 unregister_netdevice_many(&head);
2591 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
2592 static struct notifier_block ipoib_netdev_notifier = {
2593 .notifier_call = ipoib_netdev_event,
2597 static int __init ipoib_init_module(void)
2601 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
2602 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
2603 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
2605 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
2606 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
2607 ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE);
2608 #ifdef CONFIG_INFINIBAND_IPOIB_CM
2609 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
2610 ipoib_max_conn_qp = max(ipoib_max_conn_qp, 0);
2614 * When copying small received packets, we only copy from the
2615 * linear data part of the SKB, so we rely on this condition.
2617 BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE);
2619 ipoib_register_debugfs();
2622 * We create a global workqueue here that is used for all flush
2623 * operations. However, if you attempt to flush a workqueue
2624 * from a task on that same workqueue, it deadlocks the system.
2625 * We want to be able to flush the tasks associated with a
2626 * specific net device, so we also create a workqueue for each
2627 * netdevice. We queue up the tasks for that device only on
2628 * its private workqueue, and we only queue up flush events
2629 * on our global flush workqueue. This avoids the deadlocks.
2631 ipoib_workqueue = alloc_ordered_workqueue("ipoib_flush", 0);
2632 if (!ipoib_workqueue) {
2637 ib_sa_register_client(&ipoib_sa_client);
2639 ret = ib_register_client(&ipoib_client);
2643 ret = ipoib_netlink_init();
2647 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
2648 register_netdevice_notifier(&ipoib_netdev_notifier);
2653 ib_unregister_client(&ipoib_client);
2656 ib_sa_unregister_client(&ipoib_sa_client);
2657 destroy_workqueue(ipoib_workqueue);
2660 ipoib_unregister_debugfs();
2665 static void __exit ipoib_cleanup_module(void)
2667 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
2668 unregister_netdevice_notifier(&ipoib_netdev_notifier);
2670 ipoib_netlink_fini();
2671 ib_unregister_client(&ipoib_client);
2672 ib_sa_unregister_client(&ipoib_sa_client);
2673 ipoib_unregister_debugfs();
2674 destroy_workqueue(ipoib_workqueue);
2677 module_init(ipoib_init_module);
2678 module_exit(ipoib_cleanup_module);