--- /dev/null
+/*
+ * Copyright (c) 2004 Topspin Communications. 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/version.h>
+#include <linux/module.h>
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <linux/if_arp.h> /* For ARPHRD_xxx */
+
+#include <linux/ip.h>
+#include <linux/in.h>
+
+MODULE_AUTHOR("Roland Dreier");
+MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
+MODULE_LICENSE("Dual BSD/GPL");
+
+#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
+int debug_level;
+
+module_param(debug_level, int, 0644);
+MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
+#endif
+
+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;
+
+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))
+ return -EINVAL;
+
+ if (ipoib_ib_dev_up(dev))
+ return -EINVAL;
+
+ if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
+ struct ipoib_dev_priv *cpriv;
+
+ /* Bring up any child interfaces too */
+ down(&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);
+ }
+ up(&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);
+
+ netif_stop_queue(dev);
+
+ ipoib_ib_dev_down(dev);
+ ipoib_ib_dev_stop(dev);
+
+ if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
+ struct ipoib_dev_priv *cpriv;
+
+ /* Bring down any child interfaces too */
+ down(&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);
+ }
+ up(&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);
+
+ 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,
+ union ib_gid *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->raw, 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;
+
+ while ((skb = __skb_dequeue(&path->queue)))
+ dev_kfree_skb_irq(skb);
+
+ list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) {
+ if (neigh->ah)
+ ipoib_put_ah(neigh->ah);
+ *to_ipoib_neigh(neigh->neighbour) = NULL;
+ neigh->neighbour->ops->destructor = NULL;
+ kfree(neigh);
+ }
+
+ if (path->ah)
+ ipoib_put_ah(path->ah);
+
+ rb_erase(&path->rb_node, &priv->path_tree);
+ list_del(&path->list);
+ kfree(path);
+}
+
+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;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ list_splice(&priv->path_list, &remove_list);
+ INIT_LIST_HEAD(&priv->path_list);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ list_for_each_entry_safe(path, tp, &remove_list, list) {
+ if (path->query)
+ ib_sa_cancel_query(path->query_id, path->query);
+ wait_for_completion(&path->done);
+ __path_free(dev, path);
+ }
+}
+
+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;
+ struct sk_buff_head skqueue;
+ struct sk_buff *skb;
+ unsigned long flags;
+
+ if (pathrec)
+ 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 = {
+ .dlid = be16_to_cpu(pathrec->dlid),
+ .sl = pathrec->sl,
+ .port_num = priv->port
+ };
+
+ if (ib_sa_rate_enum_to_int(pathrec->rate) > 0)
+ av.static_rate = (2 * priv->local_rate -
+ ib_sa_rate_enum_to_int(pathrec->rate) - 1) /
+ (priv->local_rate ? priv->local_rate : 1);
+
+ ipoib_dbg(priv, "static_rate %d for local port %dX, path %dX\n",
+ av.static_rate, priv->local_rate,
+ ib_sa_rate_enum_to_int(pathrec->rate));
+
+ 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(neigh, &path->neigh_list, list) {
+ kref_get(&path->ah->ref);
+ neigh->ah = path->ah;
+
+ while ((skb = __skb_dequeue(&neigh->queue)))
+ __skb_queue_tail(&skqueue, skb);
+ }
+ } else
+ 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,
+ union ib_gid *gid)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ struct ipoib_path *path;
+
+ path = kmalloc(sizeof *path, GFP_ATOMIC);
+ if (!path)
+ return NULL;
+
+ path->dev = dev;
+ path->pathrec.dlid = 0;
+
+ skb_queue_head_init(&path->queue);
+
+ INIT_LIST_HEAD(&path->neigh_list);
+ path->query = NULL;
+ init_completion(&path->done);
+
+ memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid));
+ path->pathrec.sgid = priv->local_gid;
+ path->pathrec.pkey = cpu_to_be16(priv->pkey);
+ path->pathrec.numb_path = 1;
+
+ __path_add(dev, path);
+
+ 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));
+
+ path->query_id =
+ ib_sa_path_rec_get(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_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 = kmalloc(sizeof *neigh, GFP_ATOMIC);
+ if (!neigh) {
+ ++priv->stats.tx_dropped;
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ skb_queue_head_init(&neigh->queue);
+ neigh->neighbour = skb->dst->neighbour;
+ *to_ipoib_neigh(skb->dst->neighbour) = neigh;
+
+ /*
+ * 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, (union ib_gid *) (skb->dst->neighbour->ha + 4));
+ if (!path) {
+ path = path_rec_create(dev,
+ (union ib_gid *) (skb->dst->neighbour->ha + 4));
+ if (!path)
+ goto err;
+ }
+
+ list_add_tail(&neigh->list, &path->neigh_list);
+
+ if (path->pathrec.dlid) {
+ kref_get(&path->ah->ref);
+ neigh->ah = path->ah;
+
+ ipoib_send(dev, skb, path->ah,
+ be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
+ } else {
+ neigh->ah = NULL;
+ if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
+ __skb_queue_tail(&neigh->queue, skb);
+ } else {
+ ++priv->stats.tx_dropped;
+ dev_kfree_skb_any(skb);
+ }
+
+ if (!path->query && path_rec_start(dev, path))
+ goto err;
+ }
+
+ spin_unlock(&priv->lock);
+ return;
+
+err:
+ *to_ipoib_neigh(skb->dst->neighbour) = NULL;
+ list_del(&neigh->list);
+ kfree(neigh);
+ neigh->neighbour->ops->destructor = NULL;
+
+ ++priv->stats.tx_dropped;
+ dev_kfree_skb_any(skb);
+
+ spin_unlock(&priv->lock);
+}
+
+static void 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, (union ib_gid *) (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, (union ib_gid *) (phdr->hwaddr + 4));
+ if (!path) {
+ path = path_rec_create(dev,
+ (union ib_gid *) (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))
+ __path_free(dev, path);
+ } else {
+ ++priv->stats.tx_dropped;
+ dev_kfree_skb_any(skb);
+ }
+
+ spin_unlock(&priv->lock);
+ return;
+ }
+
+ if (path->pathrec.dlid) {
+ ipoib_dbg(priv, "Send unicast ARP to %04x\n",
+ be16_to_cpu(path->pathrec.dlid));
+
+ ipoib_send(dev, skb, path->ah,
+ be32_to_cpup((__be32 *) 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 {
+ ++priv->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;
+
+ local_irq_save(flags);
+ if (!spin_trylock(&priv->tx_lock)) {
+ local_irq_restore(flags);
+ return NETDEV_TX_LOCKED;
+ }
+
+ /*
+ * Check if our queue is stopped. Since we have the LLTX bit
+ * set, we can't rely on netif_stop_queue() preventing our
+ * xmit function from being called with a full queue.
+ */
+ if (unlikely(netif_queue_stopped(dev))) {
+ spin_unlock_irqrestore(&priv->tx_lock, flags);
+ return NETDEV_TX_BUSY;
+ }
+
+ if (skb->dst && skb->dst->neighbour) {
+ if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
+ path_lookup(skb, dev);
+ goto out;
+ }
+
+ neigh = *to_ipoib_neigh(skb->dst->neighbour);
+
+ if (likely(neigh->ah)) {
+ ipoib_send(dev, skb, neigh->ah,
+ be32_to_cpup((__be32 *) 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 {
+ ++priv->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, (union ib_gid *) (phdr->hwaddr + 4), skb);
+ } else {
+ /* unicast GID -- should be ARP reply */
+
+ if (be16_to_cpup((u16 *) skb->data) != ETH_P_ARP) {
+ ipoib_warn(priv, "Unicast, no %s: type %04x, QPN %06x "
+ IPOIB_GID_FMT "\n",
+ skb->dst ? "neigh" : "dst",
+ be16_to_cpup((u16 *) skb->data),
+ be32_to_cpup((u32 *) phdr->hwaddr),
+ IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4)));
+ dev_kfree_skb_any(skb);
+ ++priv->stats.tx_dropped;
+ goto out;
+ }
+
+ unicast_arp_send(skb, dev, phdr);
+ }
+ }
+
+out:
+ spin_unlock_irqrestore(&priv->tx_lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+static struct net_device_stats *ipoib_get_stats(struct net_device *dev)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+ return &priv->stats;
+}
+
+static void ipoib_timeout(struct net_device *dev)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+ ipoib_warn(priv, "transmit timeout: latency %ld\n",
+ jiffies - dev->trans_start);
+ /* XXX reset QP, etc. */
+}
+
+static int ipoib_hard_header(struct sk_buff *skb,
+ struct net_device *dev,
+ unsigned short type,
+ void *daddr, 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) {
+ 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);
+
+ schedule_work(&priv->restart_task);
+}
+
+static void ipoib_neigh_destructor(struct neighbour *n)
+{
+ struct ipoib_neigh *neigh = *to_ipoib_neigh(n);
+ struct ipoib_dev_priv *priv = netdev_priv(n->dev);
+ unsigned long flags;
+
+ ipoib_dbg(priv,
+ "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
+ be32_to_cpup((__be32 *) n->ha),
+ IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4))));
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (neigh) {
+ if (neigh->ah)
+ ipoib_put_ah(neigh->ah);
+ list_del(&neigh->list);
+ *to_ipoib_neigh(n) = NULL;
+ kfree(neigh);
+ }
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int ipoib_neigh_setup(struct neighbour *neigh)
+{
+ /*
+ * Is this kosher? I can't find anybody in the kernel that
+ * sets neigh->destructor, so we should be able to set it here
+ * without trouble.
+ */
+ neigh->ops->destructor = ipoib_neigh_destructor;
+
+ return 0;
+}
+
+static int ipoib_neigh_setup_dev(struct net_device *dev, struct neigh_parms *parms)
+{
+ parms->neigh_setup = ipoib_neigh_setup;
+
+ 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 = kmalloc(IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf),
+ GFP_KERNEL);
+ if (!priv->rx_ring) {
+ printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
+ ca->name, IPOIB_RX_RING_SIZE);
+ goto out;
+ }
+ memset(priv->rx_ring, 0,
+ IPOIB_RX_RING_SIZE * sizeof (struct ipoib_buf));
+
+ priv->tx_ring = kmalloc(IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf),
+ GFP_KERNEL);
+ if (!priv->tx_ring) {
+ printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
+ ca->name, IPOIB_TX_RING_SIZE);
+ goto out_rx_ring_cleanup;
+ }
+ memset(priv->tx_ring, 0,
+ IPOIB_TX_RING_SIZE * sizeof (struct ipoib_buf));
+
+ /* priv->tx_head & tx_tail are already 0 */
+
+ if (ipoib_ib_dev_init(dev, ca, port))
+ goto out_tx_ring_cleanup;
+
+ return 0;
+
+out_tx_ring_cleanup:
+ kfree(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_file(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);
+
+ if (priv->rx_ring) {
+ kfree(priv->rx_ring);
+ priv->rx_ring = NULL;
+ }
+
+ if (priv->tx_ring) {
+ kfree(priv->tx_ring);
+ priv->tx_ring = NULL;
+ }
+}
+
+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->get_stats = ipoib_get_stats;
+ dev->tx_timeout = ipoib_timeout;
+ dev->hard_header = ipoib_hard_header;
+ dev->set_multicast_list = ipoib_set_mcast_list;
+ dev->neigh_setup = ipoib_neigh_setup_dev;
+
+ dev->watchdog_timeo = HZ;
+
+ dev->rebuild_header = NULL;
+ dev->set_mac_address = NULL;
+ dev->header_cache_update = NULL;
+
+ 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_TX_RING_SIZE * 2;
+ dev->features = NETIF_F_VLAN_CHALLENGED | NETIF_F_LLTX;
+
+ /* 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);
+
+ SET_MODULE_OWNER(dev);
+
+ priv->dev = dev;
+
+ spin_lock_init(&priv->lock);
+ spin_lock_init(&priv->tx_lock);
+
+ init_MUTEX(&priv->mcast_mutex);
+ init_MUTEX(&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_WORK(&priv->pkey_task, ipoib_pkey_poll, priv->dev);
+ INIT_WORK(&priv->mcast_task, ipoib_mcast_join_task, priv->dev);
+ INIT_WORK(&priv->flush_task, ipoib_ib_dev_flush, priv->dev);
+ INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task, priv->dev);
+ INIT_WORK(&priv->ah_reap_task, ipoib_reap_ah, priv->dev);
+}
+
+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 class_device *cdev, char *buf)
+{
+ struct ipoib_dev_priv *priv =
+ netdev_priv(container_of(cdev, struct net_device, class_dev));
+
+ return sprintf(buf, "0x%04x\n", priv->pkey);
+}
+static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
+
+static ssize_t create_child(struct class_device *cdev,
+ 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_add(container_of(cdev, struct net_device, class_dev),
+ pkey);
+
+ return ret ? ret : count;
+}
+static CLASS_DEVICE_ATTR(create_child, S_IWUGO, NULL, create_child);
+
+static ssize_t delete_child(struct class_device *cdev,
+ 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(container_of(cdev, struct net_device, class_dev),
+ pkey);
+
+ return ret ? ret : count;
+
+}
+static CLASS_DEVICE_ATTR(delete_child, S_IWUGO, NULL, delete_child);
+
+int ipoib_add_pkey_attr(struct net_device *dev)
+{
+ return class_device_create_file(&dev->class_dev,
+ &class_device_attr_pkey);
+}
+
+static struct net_device *ipoib_add_port(const char *format,
+ struct ib_device *hca, u8 port)
+{
+ struct ipoib_dev_priv *priv;
+ 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 alloc_mem_failed;
+ }
+
+ 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 alloc_mem_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;
+ }
+
+ if (ipoib_create_debug_file(priv->dev))
+ goto debug_failed;
+
+ if (ipoib_add_pkey_attr(priv->dev))
+ goto sysfs_failed;
+ if (class_device_create_file(&priv->dev->class_dev,
+ &class_device_attr_create_child))
+ goto sysfs_failed;
+ if (class_device_create_file(&priv->dev->class_dev,
+ &class_device_attr_delete_child))
+ goto sysfs_failed;
+
+ return priv->dev;
+
+sysfs_failed:
+ ipoib_delete_debug_file(priv->dev);
+
+debug_failed:
+ unregister_netdev(priv->dev);
+
+register_failed:
+ ib_unregister_event_handler(&priv->event_handler);
+
+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;
+
+ dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
+ if (!dev_list)
+ return;
+
+ INIT_LIST_HEAD(dev_list);
+
+ if (device->node_type == IB_NODE_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;
+
+ 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);
+
+ unregister_netdev(priv->dev);
+ ipoib_dev_cleanup(priv->dev);
+ free_netdev(priv->dev);
+ }
+}
+
+static int __init ipoib_init_module(void)
+{
+ int ret;
+
+ 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;
+ }
+
+ ret = ib_register_client(&ipoib_client);
+ if (ret)
+ goto err_wq;
+
+ return 0;
+
+err_fs:
+ ipoib_unregister_debugfs();
+
+err_wq:
+ destroy_workqueue(ipoib_workqueue);
+
+ return ret;
+}
+
+static void __exit ipoib_cleanup_module(void)
+{
+ ipoib_unregister_debugfs();
+ ib_unregister_client(&ipoib_client);
+ destroy_workqueue(ipoib_workqueue);
+}
+
+module_init(ipoib_init_module);
+module_exit(ipoib_cleanup_module);
git://git.onelab.eu / linux-2.6.git / blobdiff