| /* |
| * 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. |
| * |
| * $Id: ipoib_main.c 1377 2004-12-23 19:57:12Z roland $ |
| */ |
| |
| #include "ipoib.h" |
| |
| #include <linux/module.h> |
| |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/kernel.h> |
| #include <linux/vmalloc.h> |
| |
| #include <linux/if_arp.h> /* For ARPHRD_xxx */ |
| |
| #include <linux/ip.h> |
| #include <linux/in.h> |
| |
| #include <net/dst.h> |
| |
| 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"); |
| |
| napi_enable(&priv->napi); |
| set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); |
| |
| if (ipoib_pkey_dev_delay_open(dev)) |
| return 0; |
| |
| if (ipoib_ib_dev_open(dev)) { |
| napi_disable(&priv->napi); |
| return -EINVAL; |
| } |
| |
| if (ipoib_ib_dev_up(dev)) { |
| ipoib_ib_dev_stop(dev, 1); |
| napi_disable(&priv->napi); |
| return -EINVAL; |
| } |
| |
| 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; |
| } |
| |
| 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); |
| napi_disable(&priv->napi); |
| |
| netif_stop_queue(dev); |
| |
| /* |
| * Now flush workqueue to make sure a scheduled task doesn't |
| * bring our internal state back up. |
| */ |
| flush_workqueue(ipoib_workqueue); |
| |
| ipoib_ib_dev_down(dev, 1); |
| ipoib_ib_dev_stop(dev, 1); |
| |
| 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 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_PACKET_SIZE - IPOIB_ENCAP_LEN) |
| 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_flush_paths(struct net_device *dev) |
| { |
| struct ipoib_dev_priv *priv = netdev_priv(dev); |
| struct ipoib_path *path, *tp; |
| LIST_HEAD(remove_list); |
| |
| spin_lock_irq(&priv->tx_lock); |
| spin_lock(&priv->lock); |
| |
| 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(&priv->lock); |
| spin_unlock_irq(&priv->tx_lock); |
| wait_for_completion(&path->done); |
| path_free(dev, path); |
| spin_lock_irq(&priv->tx_lock); |
| spin_lock(&priv->lock); |
| } |
| spin_unlock(&priv->lock); |
| spin_unlock_irq(&priv->tx_lock); |
| } |
| |
| 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_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 " IPOIB_GID_FMT "\n", |
| be16_to_cpu(pathrec->dlid), IPOIB_GID_ARG(pathrec->dgid)); |
| else |
| ipoib_dbg(priv, "PathRec status %d for GID " IPOIB_GID_FMT "\n", |
| status, IPOIB_GID_ARG(path->pathrec.dgid)); |
| |
| 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); |
| |
| path->ah = ah; |
| |
| if (ah) { |
| path->pathrec = *pathrec; |
| |
| 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) { |
| 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->query = NULL; |
| complete(&path->done); |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| 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 " IPOIB_GID_FMT "\n", |
| IPOIB_GID_ARG(path->pathrec.dgid)); |
| |
| 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\n"); |
| path->query = NULL; |
| return path->query_id; |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| |
| neigh = ipoib_neigh_alloc(skb->dst->neighbour, skb->dev); |
| if (!neigh) { |
| ++dev->stats.tx_dropped; |
| dev_kfree_skb_any(skb); |
| return; |
| } |
| |
| /* |
| * We can only be called from ipoib_start_xmit, so we're |
| * inside tx_lock -- no need to save/restore flags. |
| */ |
| spin_lock(&priv->lock); |
| |
| path = __path_find(dev, skb->dst->neighbour->ha + 4); |
| if (!path) { |
| path = path_rec_create(dev, skb->dst->neighbour->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 |
| ipoib_send(dev, skb, path->ah, IPOIB_QPN(skb->dst->neighbour->ha)); |
| } else { |
| neigh->ah = NULL; |
| |
| if (!path->query && path_rec_start(dev, path)) |
| goto err_list; |
| |
| __skb_queue_tail(&neigh->queue, skb); |
| } |
| |
| spin_unlock(&priv->lock); |
| 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(&priv->lock); |
| } |
| |
| static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct ipoib_dev_priv *priv = netdev_priv(skb->dev); |
| |
| /* Look up path record for unicasts */ |
| if (skb->dst->neighbour->ha[4] != 0xff) { |
| neigh_add_path(skb, dev); |
| return; |
| } |
| |
| /* Add in the P_Key for multicasts */ |
| skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; |
| skb->dst->neighbour->ha[9] = priv->pkey & 0xff; |
| ipoib_mcast_send(dev, skb->dst->neighbour->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; |
| |
| /* |
| * We can only be called from ipoib_start_xmit, so we're |
| * inside tx_lock -- no need to save/restore flags. |
| */ |
| spin_lock(&priv->lock); |
| |
| path = __path_find(dev, phdr->hwaddr + 4); |
| if (!path) { |
| path = path_rec_create(dev, phdr->hwaddr + 4); |
| if (path) { |
| /* put pseudoheader back on for next time */ |
| skb_push(skb, sizeof *phdr); |
| __skb_queue_tail(&path->queue, skb); |
| |
| if (path_rec_start(dev, path)) { |
| spin_unlock(&priv->lock); |
| path_free(dev, path); |
| return; |
| } else |
| __path_add(dev, path); |
| } else { |
| ++dev->stats.tx_dropped; |
| dev_kfree_skb_any(skb); |
| } |
| |
| spin_unlock(&priv->lock); |
| return; |
| } |
| |
| if (path->ah) { |
| ipoib_dbg(priv, "Send unicast ARP to %04x\n", |
| be16_to_cpu(path->pathrec.dlid)); |
| |
| ipoib_send(dev, skb, path->ah, IPOIB_QPN(phdr->hwaddr)); |
| } 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(&priv->lock); |
| } |
| |
| 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; |
| unsigned long flags; |
| |
| if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags))) |
| return NETDEV_TX_LOCKED; |
| |
| if (likely(skb->dst && skb->dst->neighbour)) { |
| if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) { |
| ipoib_path_lookup(skb, dev); |
| goto out; |
| } |
| |
| neigh = *to_ipoib_neigh(skb->dst->neighbour); |
| |
| if (neigh->ah) |
| if (unlikely((memcmp(&neigh->dgid.raw, |
| skb->dst->neighbour->ha + 4, |
| sizeof(union ib_gid))) || |
| (neigh->dev != dev))) { |
| spin_lock(&priv->lock); |
| /* |
| * 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. |
| */ |
| ipoib_put_ah(neigh->ah); |
| list_del(&neigh->list); |
| ipoib_neigh_free(dev, neigh); |
| spin_unlock(&priv->lock); |
| ipoib_path_lookup(skb, dev); |
| goto out; |
| } |
| |
| if (ipoib_cm_get(neigh)) { |
| if (ipoib_cm_up(neigh)) { |
| ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); |
| goto out; |
| } |
| } else if (neigh->ah) { |
| ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha)); |
| goto out; |
| } |
| |
| if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { |
| spin_lock(&priv->lock); |
| __skb_queue_tail(&neigh->queue, skb); |
| spin_unlock(&priv->lock); |
| } 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 " |
| IPOIB_GID_FMT "\n", |
| skb->dst ? "neigh" : "dst", |
| be16_to_cpup((__be16 *) skb->data), |
| IPOIB_QPN(phdr->hwaddr), |
| IPOIB_GID_RAW_ARG(phdr->hwaddr + 4)); |
| dev_kfree_skb_any(skb); |
| ++dev->stats.tx_dropped; |
| goto out; |
| } |
| |
| unicast_arp_send(skb, dev, phdr); |
| } |
| } |
| |
| out: |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| |
| 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; |
| |
| 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. |
| */ |
| if ((!skb->dst || !skb->dst->neighbour) && 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 " IPOIB_GID_FMT "\n", |
| IPOIB_QPN(n->ha), |
| IPOIB_GID_RAW_ARG(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; |
| *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 = vmalloc(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; |
| } |
| memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring); |
| |
| /* 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 void ipoib_setup(struct net_device *dev) |
| { |
| struct ipoib_dev_priv *priv = netdev_priv(dev); |
| |
| dev->open = ipoib_open; |
| dev->stop = ipoib_stop; |
| dev->change_mtu = ipoib_change_mtu; |
| dev->hard_start_xmit = ipoib_start_xmit; |
| dev->tx_timeout = ipoib_timeout; |
| dev->header_ops = &ipoib_header_ops; |
| dev->set_multicast_list = ipoib_set_mcast_list; |
| dev->neigh_setup = ipoib_neigh_setup_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_LLTX | |
| NETIF_F_HIGHDMA); |
| |
| /* MTU will be reset when mcast join happens */ |
| dev->mtu = IPOIB_PACKET_SIZE - IPOIB_ENCAP_LEN; |
| priv->mcast_mtu = priv->admin_mtu = dev->mtu; |
| |
| memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); |
| |
| netif_carrier_off(dev); |
| |
| priv->dev = dev; |
| |
| spin_lock_init(&priv->lock); |
| spin_lock_init(&priv->tx_lock); |
| |
| mutex_init(&priv->mcast_mutex); |
| 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_WORK(&priv->pkey_event_task, ipoib_pkey_event); |
| INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); |
| INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush); |
| 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_IWUGO, 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_IWUGO, NULL, delete_child); |
| |
| int ipoib_add_pkey_attr(struct net_device *dev) |
| { |
| return device_create_file(&dev->dev, &dev_attr_pkey); |
| } |
| |
| static struct net_device *ipoib_add_port(const char *format, |
| struct ib_device *hca, u8 port) |
| { |
| struct ipoib_dev_priv *priv; |
| struct ib_device_attr *device_attr; |
| int result = -ENOMEM; |
| |
| priv = ipoib_intf_alloc(format); |
| if (!priv) |
| goto alloc_mem_failed; |
| |
| SET_NETDEV_DEV(priv->dev, hca->dma_device); |
| |
| 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; |
| } |
| |
| 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); |
| goto device_init_failed; |
| } |
| |
| 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); |
| goto device_init_failed; |
| } |
| |
| if (device_attr->device_cap_flags & IB_DEVICE_UD_IP_CSUM) { |
| set_bit(IPOIB_FLAG_CSUM, &priv->flags); |
| priv->dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; |
| } |
| |
| kfree(device_attr); |
| |
| /* |
| * 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_scheduled_work(); |
| |
| 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) { |
| 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); |
| flush_scheduled_work(); |
| |
| 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 = max(ipoib_sendq_size, IPOIB_MIN_QUEUE_SIZE); |
| #ifdef CONFIG_INFINIBAND_IPOIB_CM |
| ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); |
| #endif |
| |
| 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); |