/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. * Copyright (c) 2004 Voltaire, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include "ipoib.h" #include #include #include #include #include #include /* For ARPHRD_xxx */ #include #include #include MODULE_AUTHOR("Roland Dreier"); MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); MODULE_LICENSE("Dual BSD/GPL"); int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG int ipoib_debug_level; module_param_named(debug_level, ipoib_debug_level, int, 0644); MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); #endif struct ipoib_path_iter { struct net_device *dev; struct ipoib_path path; }; static const u8 ipv4_bcast_addr[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff }; struct workqueue_struct *ipoib_workqueue; struct ib_sa_client ipoib_sa_client; static void ipoib_add_one(struct ib_device *device); static void ipoib_remove_one(struct ib_device *device); static struct ib_client ipoib_client = { .name = "ipoib", .add = ipoib_add_one, .remove = ipoib_remove_one }; int ipoib_open(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); ipoib_dbg(priv, "bringing up interface\n"); set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); if (ipoib_pkey_dev_delay_open(dev)) return 0; if (ipoib_ib_dev_open(dev)) goto err_disable; if (ipoib_ib_dev_up(dev)) goto err_stop; if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { struct ipoib_dev_priv *cpriv; /* Bring up any child interfaces too */ mutex_lock(&priv->vlan_mutex); list_for_each_entry(cpriv, &priv->child_intfs, list) { int flags; flags = cpriv->dev->flags; if (flags & IFF_UP) continue; dev_change_flags(cpriv->dev, flags | IFF_UP); } mutex_unlock(&priv->vlan_mutex); } netif_start_queue(dev); return 0; err_stop: ipoib_ib_dev_stop(dev, 1); err_disable: clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); return -EINVAL; } static int ipoib_stop(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); ipoib_dbg(priv, "stopping interface\n"); clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); netif_stop_queue(dev); ipoib_ib_dev_down(dev, 0); ipoib_ib_dev_stop(dev, 0); if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { struct ipoib_dev_priv *cpriv; /* Bring down any child interfaces too */ mutex_lock(&priv->vlan_mutex); list_for_each_entry(cpriv, &priv->child_intfs, list) { int flags; flags = cpriv->dev->flags; if (!(flags & IFF_UP)) continue; dev_change_flags(cpriv->dev, flags & ~IFF_UP); } mutex_unlock(&priv->vlan_mutex); } return 0; } static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features) { struct ipoib_dev_priv *priv = netdev_priv(dev); if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) features &= ~(NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO); return features; } static int ipoib_change_mtu(struct net_device *dev, int new_mtu) { struct ipoib_dev_priv *priv = netdev_priv(dev); /* dev->mtu > 2K ==> connected mode */ if (ipoib_cm_admin_enabled(dev)) { if (new_mtu > ipoib_cm_max_mtu(dev)) return -EINVAL; if (new_mtu > priv->mcast_mtu) ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", priv->mcast_mtu); dev->mtu = new_mtu; return 0; } if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) return -EINVAL; priv->admin_mtu = new_mtu; dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); return 0; } static struct ipoib_path *__path_find(struct net_device *dev, void *gid) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct rb_node *n = priv->path_tree.rb_node; struct ipoib_path *path; int ret; while (n) { path = rb_entry(n, struct ipoib_path, rb_node); ret = memcmp(gid, path->pathrec.dgid.raw, sizeof (union ib_gid)); if (ret < 0) n = n->rb_left; else if (ret > 0) n = n->rb_right; else return path; } return NULL; } static int __path_add(struct net_device *dev, struct ipoib_path *path) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct rb_node **n = &priv->path_tree.rb_node; struct rb_node *pn = NULL; struct ipoib_path *tpath; int ret; while (*n) { pn = *n; tpath = rb_entry(pn, struct ipoib_path, rb_node); ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, sizeof (union ib_gid)); if (ret < 0) n = &pn->rb_left; else if (ret > 0) n = &pn->rb_right; else return -EEXIST; } rb_link_node(&path->rb_node, pn, n); rb_insert_color(&path->rb_node, &priv->path_tree); list_add_tail(&path->list, &priv->path_list); return 0; } static void path_free(struct net_device *dev, struct ipoib_path *path) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_neigh *neigh, *tn; struct sk_buff *skb; unsigned long flags; while ((skb = __skb_dequeue(&path->queue))) dev_kfree_skb_irq(skb); spin_lock_irqsave(&priv->lock, flags); list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { /* * It's safe to call ipoib_put_ah() inside priv->lock * here, because we know that path->ah will always * hold one more reference, so ipoib_put_ah() will * never do more than decrement the ref count. */ if (neigh->ah) ipoib_put_ah(neigh->ah); ipoib_neigh_free(dev, neigh); } spin_unlock_irqrestore(&priv->lock, flags); if (path->ah) ipoib_put_ah(path->ah); kfree(path); } #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) { struct ipoib_path_iter *iter; iter = kmalloc(sizeof *iter, GFP_KERNEL); if (!iter) return NULL; iter->dev = dev; memset(iter->path.pathrec.dgid.raw, 0, 16); if (ipoib_path_iter_next(iter)) { kfree(iter); return NULL; } return iter; } int ipoib_path_iter_next(struct ipoib_path_iter *iter) { struct ipoib_dev_priv *priv = netdev_priv(iter->dev); struct rb_node *n; struct ipoib_path *path; int ret = 1; spin_lock_irq(&priv->lock); n = rb_first(&priv->path_tree); while (n) { path = rb_entry(n, struct ipoib_path, rb_node); if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, sizeof (union ib_gid)) < 0) { iter->path = *path; ret = 0; break; } n = rb_next(n); } spin_unlock_irq(&priv->lock); return ret; } void ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path) { *path = iter->path; } #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ void ipoib_mark_paths_invalid(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_path *path, *tp; spin_lock_irq(&priv->lock); list_for_each_entry_safe(path, tp, &priv->path_list, list) { ipoib_dbg(priv, "mark path LID 0x%04x GID %pI6 invalid\n", be16_to_cpu(path->pathrec.dlid), path->pathrec.dgid.raw); path->valid = 0; } spin_unlock_irq(&priv->lock); } void ipoib_flush_paths(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_path *path, *tp; LIST_HEAD(remove_list); unsigned long flags; netif_tx_lock_bh(dev); spin_lock_irqsave(&priv->lock, flags); list_splice_init(&priv->path_list, &remove_list); list_for_each_entry(path, &remove_list, list) rb_erase(&path->rb_node, &priv->path_tree); list_for_each_entry_safe(path, tp, &remove_list, list) { if (path->query) ib_sa_cancel_query(path->query_id, path->query); spin_unlock_irqrestore(&priv->lock, flags); netif_tx_unlock_bh(dev); wait_for_completion(&path->done); path_free(dev, path); netif_tx_lock_bh(dev); spin_lock_irqsave(&priv->lock, flags); } spin_unlock_irqrestore(&priv->lock, flags); netif_tx_unlock_bh(dev); } static void path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr) { struct ipoib_path *path = path_ptr; struct net_device *dev = path->dev; struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_ah *ah = NULL; struct ipoib_ah *old_ah = NULL; struct ipoib_neigh *neigh, *tn; struct sk_buff_head skqueue; struct sk_buff *skb; unsigned long flags; if (!status) ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", be16_to_cpu(pathrec->dlid), pathrec->dgid.raw); else ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", status, path->pathrec.dgid.raw); skb_queue_head_init(&skqueue); if (!status) { struct ib_ah_attr av; if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) ah = ipoib_create_ah(dev, priv->pd, &av); } spin_lock_irqsave(&priv->lock, flags); if (!IS_ERR_OR_NULL(ah)) { path->pathrec = *pathrec; old_ah = path->ah; path->ah = ah; ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", ah, be16_to_cpu(pathrec->dlid), pathrec->sl); while ((skb = __skb_dequeue(&path->queue))) __skb_queue_tail(&skqueue, skb); list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { if (neigh->ah) { WARN_ON(neigh->ah != old_ah); /* * Dropping the ah reference inside * priv->lock is safe here, because we * will hold one more reference from * the original value of path->ah (ie * old_ah). */ ipoib_put_ah(neigh->ah); } kref_get(&path->ah->ref); neigh->ah = path->ah; memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, sizeof(union ib_gid)); if (ipoib_cm_enabled(dev, neigh->neighbour)) { if (!ipoib_cm_get(neigh)) ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); if (!ipoib_cm_get(neigh)) { list_del(&neigh->list); if (neigh->ah) ipoib_put_ah(neigh->ah); ipoib_neigh_free(dev, neigh); continue; } } while ((skb = __skb_dequeue(&neigh->queue))) __skb_queue_tail(&skqueue, skb); } path->valid = 1; } path->query = NULL; complete(&path->done); spin_unlock_irqrestore(&priv->lock, flags); if (old_ah) ipoib_put_ah(old_ah); while ((skb = __skb_dequeue(&skqueue))) { skb->dev = dev; if (dev_queue_xmit(skb)) ipoib_warn(priv, "dev_queue_xmit failed " "to requeue packet\n"); } } static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_path *path; if (!priv->broadcast) return NULL; path = kzalloc(sizeof *path, GFP_ATOMIC); if (!path) return NULL; path->dev = dev; skb_queue_head_init(&path->queue); INIT_LIST_HEAD(&path->neigh_list); memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); path->pathrec.sgid = priv->local_gid; path->pathrec.pkey = cpu_to_be16(priv->pkey); path->pathrec.numb_path = 1; path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; return path; } static int path_rec_start(struct net_device *dev, struct ipoib_path *path) { struct ipoib_dev_priv *priv = netdev_priv(dev); ipoib_dbg(priv, "Start path record lookup for %pI6\n", path->pathrec.dgid.raw); init_completion(&path->done); path->query_id = ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, &path->pathrec, IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | IB_SA_PATH_REC_NUMB_PATH | IB_SA_PATH_REC_TRAFFIC_CLASS | IB_SA_PATH_REC_PKEY, 1000, GFP_ATOMIC, path_rec_completion, path, &path->query); if (path->query_id < 0) { ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); path->query = NULL; complete(&path->done); return path->query_id; } return 0; } /* called with rcu_read_lock */ static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_path *path; struct ipoib_neigh *neigh; struct neighbour *n; unsigned long flags; n = dst_get_neighbour(skb_dst(skb)); neigh = ipoib_neigh_alloc(n, skb->dev); if (!neigh) { ++dev->stats.tx_dropped; dev_kfree_skb_any(skb); return; } spin_lock_irqsave(&priv->lock, flags); path = __path_find(dev, n->ha + 4); if (!path) { path = path_rec_create(dev, n->ha + 4); if (!path) goto err_path; __path_add(dev, path); } list_add_tail(&neigh->list, &path->neigh_list); if (path->ah) { kref_get(&path->ah->ref); neigh->ah = path->ah; memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw, sizeof(union ib_gid)); if (ipoib_cm_enabled(dev, neigh->neighbour)) { if (!ipoib_cm_get(neigh)) ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); if (!ipoib_cm_get(neigh)) { list_del(&neigh->list); if (neigh->ah) ipoib_put_ah(neigh->ah); ipoib_neigh_free(dev, neigh); goto err_drop; } if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) __skb_queue_tail(&neigh->queue, skb); else { ipoib_warn(priv, "queue length limit %d. Packet drop.\n", skb_queue_len(&neigh->queue)); goto err_drop; } } else { spin_unlock_irqrestore(&priv->lock, flags); ipoib_send(dev, skb, path->ah, IPOIB_QPN(n->ha)); return; } } else { neigh->ah = NULL; if (!path->query && path_rec_start(dev, path)) goto err_list; __skb_queue_tail(&neigh->queue, skb); } spin_unlock_irqrestore(&priv->lock, flags); return; err_list: list_del(&neigh->list); err_path: ipoib_neigh_free(dev, neigh); err_drop: ++dev->stats.tx_dropped; dev_kfree_skb_any(skb); spin_unlock_irqrestore(&priv->lock, flags); } /* called with rcu_read_lock */ static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(skb->dev); struct dst_entry *dst = skb_dst(skb); struct neighbour *n; /* Look up path record for unicasts */ n = dst_get_neighbour(dst); if (n->ha[4] != 0xff) { neigh_add_path(skb, dev); return; } /* Add in the P_Key for multicasts */ n->ha[8] = (priv->pkey >> 8) & 0xff; n->ha[9] = priv->pkey & 0xff; ipoib_mcast_send(dev, n->ha + 4, skb); } static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, struct ipoib_pseudoheader *phdr) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_path *path; unsigned long flags; spin_lock_irqsave(&priv->lock, flags); path = __path_find(dev, phdr->hwaddr + 4); if (!path || !path->valid) { int new_path = 0; if (!path) { path = path_rec_create(dev, phdr->hwaddr + 4); new_path = 1; } if (path) { /* put pseudoheader back on for next time */ skb_push(skb, sizeof *phdr); __skb_queue_tail(&path->queue, skb); if (!path->query && path_rec_start(dev, path)) { spin_unlock_irqrestore(&priv->lock, flags); if (new_path) path_free(dev, path); return; } else __path_add(dev, path); } else { ++dev->stats.tx_dropped; dev_kfree_skb_any(skb); } spin_unlock_irqrestore(&priv->lock, flags); return; } if (path->ah) { ipoib_dbg(priv, "Send unicast ARP to %04x\n", be16_to_cpu(path->pathrec.dlid)); spin_unlock_irqrestore(&priv->lock, flags); ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); return; } else if ((path->query || !path_rec_start(dev, path)) && skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { /* put pseudoheader back on for next time */ skb_push(skb, sizeof *phdr); __skb_queue_tail(&path->queue, skb); } else { ++dev->stats.tx_dropped; dev_kfree_skb_any(skb); } spin_unlock_irqrestore(&priv->lock, flags); } static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_neigh *neigh; struct neighbour *n = NULL; unsigned long flags; rcu_read_lock(); if (likely(skb_dst(skb))) n = dst_get_neighbour(skb_dst(skb)); if (likely(n)) { if (unlikely(!*to_ipoib_neigh(n))) { ipoib_path_lookup(skb, dev); goto unlock; } neigh = *to_ipoib_neigh(n); if (unlikely((memcmp(&neigh->dgid.raw, n->ha + 4, sizeof(union ib_gid))) || (neigh->dev != dev))) { spin_lock_irqsave(&priv->lock, flags); /* * It's safe to call ipoib_put_ah() inside * priv->lock here, because we know that * path->ah will always hold one more reference, * so ipoib_put_ah() will never do more than * decrement the ref count. */ if (neigh->ah) ipoib_put_ah(neigh->ah); list_del(&neigh->list); ipoib_neigh_free(dev, neigh); spin_unlock_irqrestore(&priv->lock, flags); ipoib_path_lookup(skb, dev); goto unlock; } if (ipoib_cm_get(neigh)) { if (ipoib_cm_up(neigh)) { ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); goto unlock; } } else if (neigh->ah) { ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(n->ha)); goto unlock; } if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { spin_lock_irqsave(&priv->lock, flags); __skb_queue_tail(&neigh->queue, skb); spin_unlock_irqrestore(&priv->lock, flags); } else { ++dev->stats.tx_dropped; dev_kfree_skb_any(skb); } } else { struct ipoib_pseudoheader *phdr = (struct ipoib_pseudoheader *) skb->data; skb_pull(skb, sizeof *phdr); if (phdr->hwaddr[4] == 0xff) { /* Add in the P_Key for multicast*/ phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; phdr->hwaddr[9] = priv->pkey & 0xff; ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); } else { /* unicast GID -- should be ARP or RARP reply */ if ((be16_to_cpup((__be16 *) skb->data) != ETH_P_ARP) && (be16_to_cpup((__be16 *) skb->data) != ETH_P_RARP)) { ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x %pI6\n", skb_dst(skb) ? "neigh" : "dst", be16_to_cpup((__be16 *) skb->data), IPOIB_QPN(phdr->hwaddr), phdr->hwaddr + 4); dev_kfree_skb_any(skb); ++dev->stats.tx_dropped; goto unlock; } unicast_arp_send(skb, dev, phdr); } } unlock: rcu_read_unlock(); return NETDEV_TX_OK; } static void ipoib_timeout(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); ipoib_warn(priv, "transmit timeout: latency %d msecs\n", jiffies_to_msecs(jiffies - dev->trans_start)); ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", netif_queue_stopped(dev), priv->tx_head, priv->tx_tail); /* XXX reset QP, etc. */ } static int ipoib_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned len) { struct ipoib_header *header; struct dst_entry *dst; struct neighbour *n; header = (struct ipoib_header *) skb_push(skb, sizeof *header); header->proto = htons(type); header->reserved = 0; /* * If we don't have a neighbour structure, stuff the * destination address onto the front of the skb so we can * figure out where to send the packet later. */ dst = skb_dst(skb); n = NULL; if (dst) n = dst_get_neighbour_raw(dst); if ((!dst || !n) && daddr) { struct ipoib_pseudoheader *phdr = (struct ipoib_pseudoheader *) skb_push(skb, sizeof *phdr); memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); } return 0; } static void ipoib_set_mcast_list(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); return; } queue_work(ipoib_workqueue, &priv->restart_task); } static void ipoib_neigh_cleanup(struct neighbour *n) { struct ipoib_neigh *neigh; struct ipoib_dev_priv *priv = netdev_priv(n->dev); unsigned long flags; struct ipoib_ah *ah = NULL; neigh = *to_ipoib_neigh(n); if (neigh) priv = netdev_priv(neigh->dev); else return; ipoib_dbg(priv, "neigh_cleanup for %06x %pI6\n", IPOIB_QPN(n->ha), n->ha + 4); spin_lock_irqsave(&priv->lock, flags); if (neigh->ah) ah = neigh->ah; list_del(&neigh->list); ipoib_neigh_free(n->dev, neigh); spin_unlock_irqrestore(&priv->lock, flags); if (ah) ipoib_put_ah(ah); } struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour, struct net_device *dev) { struct ipoib_neigh *neigh; neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); if (!neigh) return NULL; neigh->neighbour = neighbour; neigh->dev = dev; memset(&neigh->dgid.raw, 0, sizeof (union ib_gid)); *to_ipoib_neigh(neighbour) = neigh; skb_queue_head_init(&neigh->queue); ipoib_cm_set(neigh, NULL); return neigh; } void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh) { struct sk_buff *skb; *to_ipoib_neigh(neigh->neighbour) = NULL; while ((skb = __skb_dequeue(&neigh->queue))) { ++dev->stats.tx_dropped; dev_kfree_skb_any(skb); } if (ipoib_cm_get(neigh)) ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); kfree(neigh); } static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms) { parms->neigh_cleanup = ipoib_neigh_cleanup; return 0; } int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port) { struct ipoib_dev_priv *priv = netdev_priv(dev); /* Allocate RX/TX "rings" to hold queued skbs */ priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, GFP_KERNEL); if (!priv->rx_ring) { printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", ca->name, ipoib_recvq_size); goto out; } priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring); if (!priv->tx_ring) { printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", ca->name, ipoib_sendq_size); goto out_rx_ring_cleanup; } /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ if (ipoib_ib_dev_init(dev, ca, port)) goto out_tx_ring_cleanup; return 0; out_tx_ring_cleanup: vfree(priv->tx_ring); out_rx_ring_cleanup: kfree(priv->rx_ring); out: return -ENOMEM; } void ipoib_dev_cleanup(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv; ipoib_delete_debug_files(dev); /* Delete any child interfaces first */ list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { unregister_netdev(cpriv->dev); ipoib_dev_cleanup(cpriv->dev); free_netdev(cpriv->dev); } ipoib_ib_dev_cleanup(dev); kfree(priv->rx_ring); vfree(priv->tx_ring); priv->rx_ring = NULL; priv->tx_ring = NULL; } static const struct header_ops ipoib_header_ops = { .create = ipoib_hard_header, }; static const struct net_device_ops ipoib_netdev_ops = { .ndo_open = ipoib_open, .ndo_stop = ipoib_stop, .ndo_change_mtu = ipoib_change_mtu, .ndo_fix_features = ipoib_fix_features, .ndo_start_xmit = ipoib_start_xmit, .ndo_tx_timeout = ipoib_timeout, .ndo_set_rx_mode = ipoib_set_mcast_list, .ndo_neigh_setup = ipoib_neigh_setup_dev, }; static void ipoib_setup(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); dev->netdev_ops = &ipoib_netdev_ops; dev->header_ops = &ipoib_header_ops; ipoib_set_ethtool_ops(dev); netif_napi_add(dev, &priv->napi, ipoib_poll, 100); dev->watchdog_timeo = HZ; dev->flags |= IFF_BROADCAST | IFF_MULTICAST; /* * We add in INFINIBAND_ALEN to allow for the destination * address "pseudoheader" for skbs without neighbour struct. */ dev->hard_header_len = IPOIB_ENCAP_LEN + INFINIBAND_ALEN; dev->addr_len = INFINIBAND_ALEN; dev->type = ARPHRD_INFINIBAND; dev->tx_queue_len = ipoib_sendq_size * 2; dev->features = (NETIF_F_VLAN_CHALLENGED | NETIF_F_HIGHDMA); dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); netif_carrier_off(dev); priv->dev = dev; spin_lock_init(&priv->lock); mutex_init(&priv->vlan_mutex); INIT_LIST_HEAD(&priv->path_list); INIT_LIST_HEAD(&priv->child_intfs); INIT_LIST_HEAD(&priv->dead_ahs); INIT_LIST_HEAD(&priv->multicast_list); INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); } struct ipoib_dev_priv *ipoib_intf_alloc(const char *name) { struct net_device *dev; dev = alloc_netdev((int) sizeof (struct ipoib_dev_priv), name, ipoib_setup); if (!dev) return NULL; return netdev_priv(dev); } static ssize_t show_pkey(struct device *dev, struct device_attribute *attr, char *buf) { struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); return sprintf(buf, "0x%04x\n", priv->pkey); } static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); static ssize_t show_umcast(struct device *dev, struct device_attribute *attr, char *buf) { struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); } static ssize_t set_umcast(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(dev)); unsigned long umcast_val = simple_strtoul(buf, NULL, 0); if (umcast_val > 0) { set_bit(IPOIB_FLAG_UMCAST, &priv->flags); ipoib_warn(priv, "ignoring multicast groups joined directly " "by userspace\n"); } else clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); return count; } static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); int ipoib_add_umcast_attr(struct net_device *dev) { return device_create_file(&dev->dev, &dev_attr_umcast); } static ssize_t create_child(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int pkey; int ret; if (sscanf(buf, "%i", &pkey) != 1) return -EINVAL; if (pkey < 0 || pkey > 0xffff) return -EINVAL; /* * Set the full membership bit, so that we join the right * broadcast group, etc. */ pkey |= 0x8000; ret = ipoib_vlan_add(to_net_dev(dev), pkey); return ret ? ret : count; } static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); static ssize_t delete_child(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int pkey; int ret; if (sscanf(buf, "%i", &pkey) != 1) return -EINVAL; if (pkey < 0 || pkey > 0xffff) return -EINVAL; ret = ipoib_vlan_delete(to_net_dev(dev), pkey); return ret ? ret : count; } static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); int ipoib_add_pkey_attr(struct net_device *dev) { return device_create_file(&dev->dev, &dev_attr_pkey); } int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) { struct ib_device_attr *device_attr; int result = -ENOMEM; device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); if (!device_attr) { printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", hca->name, sizeof *device_attr); return result; } result = ib_query_device(hca, device_attr); if (result) { printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", hca->name, result); kfree(device_attr); return result; } priv->hca_caps = device_attr->device_cap_flags; kfree(device_attr); if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { priv->dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; if (priv->hca_caps & IB_DEVICE_UD_TSO) priv->dev->hw_features |= NETIF_F_TSO; priv->dev->features |= priv->dev->hw_features; } return 0; } static struct net_device *ipoib_add_port(const char *format, struct ib_device *hca, u8 port) { struct ipoib_dev_priv *priv; struct ib_port_attr attr; int result = -ENOMEM; priv = ipoib_intf_alloc(format); if (!priv) goto alloc_mem_failed; SET_NETDEV_DEV(priv->dev, hca->dma_device); priv->dev->dev_id = port - 1; if (!ib_query_port(hca, port, &attr)) priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); else { printk(KERN_WARNING "%s: ib_query_port %d failed\n", hca->name, port); goto device_init_failed; } /* MTU will be reset when mcast join happens */ priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh); result = ib_query_pkey(hca, port, 0, &priv->pkey); if (result) { printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", hca->name, port, result); goto device_init_failed; } if (ipoib_set_dev_features(priv, hca)) goto device_init_failed; /* * Set the full membership bit, so that we join the right * broadcast group, etc. */ priv->pkey |= 0x8000; priv->dev->broadcast[8] = priv->pkey >> 8; priv->dev->broadcast[9] = priv->pkey & 0xff; result = ib_query_gid(hca, port, 0, &priv->local_gid); if (result) { printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", hca->name, port, result); goto device_init_failed; } else memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); result = ipoib_dev_init(priv->dev, hca, port); if (result < 0) { printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", hca->name, port, result); goto device_init_failed; } INIT_IB_EVENT_HANDLER(&priv->event_handler, priv->ca, ipoib_event); result = ib_register_event_handler(&priv->event_handler); if (result < 0) { printk(KERN_WARNING "%s: ib_register_event_handler failed for " "port %d (ret = %d)\n", hca->name, port, result); goto event_failed; } result = register_netdev(priv->dev); if (result) { printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n", hca->name, port, result); goto register_failed; } ipoib_create_debug_files(priv->dev); if (ipoib_cm_add_mode_attr(priv->dev)) goto sysfs_failed; if (ipoib_add_pkey_attr(priv->dev)) goto sysfs_failed; if (ipoib_add_umcast_attr(priv->dev)) goto sysfs_failed; if (device_create_file(&priv->dev->dev, &dev_attr_create_child)) goto sysfs_failed; if (device_create_file(&priv->dev->dev, &dev_attr_delete_child)) goto sysfs_failed; return priv->dev; sysfs_failed: ipoib_delete_debug_files(priv->dev); unregister_netdev(priv->dev); register_failed: ib_unregister_event_handler(&priv->event_handler); flush_workqueue(ipoib_workqueue); event_failed: ipoib_dev_cleanup(priv->dev); device_init_failed: free_netdev(priv->dev); alloc_mem_failed: return ERR_PTR(result); } static void ipoib_add_one(struct ib_device *device) { struct list_head *dev_list; struct net_device *dev; struct ipoib_dev_priv *priv; int s, e, p; if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) return; dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); if (!dev_list) return; INIT_LIST_HEAD(dev_list); if (device->node_type == RDMA_NODE_IB_SWITCH) { s = 0; e = 0; } else { s = 1; e = device->phys_port_cnt; } for (p = s; p <= e; ++p) { if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) continue; dev = ipoib_add_port("ib%d", device, p); if (!IS_ERR(dev)) { priv = netdev_priv(dev); list_add_tail(&priv->list, dev_list); } } ib_set_client_data(device, &ipoib_client, dev_list); } static void ipoib_remove_one(struct ib_device *device) { struct ipoib_dev_priv *priv, *tmp; struct list_head *dev_list; if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) return; dev_list = ib_get_client_data(device, &ipoib_client); list_for_each_entry_safe(priv, tmp, dev_list, list) { ib_unregister_event_handler(&priv->event_handler); rtnl_lock(); dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); rtnl_unlock(); flush_workqueue(ipoib_workqueue); unregister_netdev(priv->dev); ipoib_dev_cleanup(priv->dev); free_netdev(priv->dev); } kfree(dev_list); } static int __init ipoib_init_module(void) { int ret; ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); #ifdef CONFIG_INFINIBAND_IPOIB_CM ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); #endif /* * When copying small received packets, we only copy from the * linear data part of the SKB, so we rely on this condition. */ BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); ret = ipoib_register_debugfs(); if (ret) return ret; /* * We create our own workqueue mainly because we want to be * able to flush it when devices are being removed. We can't * use schedule_work()/flush_scheduled_work() because both * unregister_netdev() and linkwatch_event take the rtnl lock, * so flush_scheduled_work() can deadlock during device * removal. */ ipoib_workqueue = create_singlethread_workqueue("ipoib"); if (!ipoib_workqueue) { ret = -ENOMEM; goto err_fs; } ib_sa_register_client(&ipoib_sa_client); ret = ib_register_client(&ipoib_client); if (ret) goto err_sa; return 0; err_sa: ib_sa_unregister_client(&ipoib_sa_client); destroy_workqueue(ipoib_workqueue); err_fs: ipoib_unregister_debugfs(); return ret; } static void __exit ipoib_cleanup_module(void) { ib_unregister_client(&ipoib_client); ib_sa_unregister_client(&ipoib_sa_client); ipoib_unregister_debugfs(); destroy_workqueue(ipoib_workqueue); } module_init(ipoib_init_module); module_exit(ipoib_cleanup_module);