- 根目录:
- drivers
- infiniband
- ulp
- ipoib
- ipoib_main.c
/*
* 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 <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 <linux/jhash.h>
#include <net/arp.h>
#define DRV_VERSION "1.0.0"
const char ipoib_driver_version[] = DRV_VERSION;
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);
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 void ipoib_neigh_reclaim(struct rcu_head *rp);
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, 1);
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 void ipoib_uninit(struct net_device *dev)
{
ipoib_dev_cleanup(dev);
}
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;
}
int ipoib_set_mode(struct net_device *dev, const char *buf)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
/* flush paths if we switch modes so that connections are restarted */
if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) {
set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
ipoib_warn(priv, "enabling connected mode "
"will cause multicast packet drops\n");
netdev_update_features(dev);
rtnl_unlock();
priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
ipoib_flush_paths(dev);
rtnl_lock();
return 0;
}
if (!strcmp(buf, "datagram\n")) {
clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
netdev_update_features(dev);
dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
rtnl_unlock();
ipoib_flush_paths(dev);
rtnl_lock();
return 0;
}
return -EINVAL;
}
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 sk_buff *skb;
while ((skb = __skb_dequeue(&path->queue)))
dev_kfree_skb_irq(skb);
ipoib_dbg(netdev_priv(dev), "path_free\n");
/* remove all neigh connected to this path */
ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
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;
if (ipoib_cm_enabled(dev, neigh->daddr)) {
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);
ipoib_neigh_free(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 (IS_ERR_OR_NULL(ah))
ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
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;
}
static void neigh_add_path(struct sk_buff *skb, u8 *daddr,
struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_path *path;
struct ipoib_neigh *neigh;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
neigh = ipoib_neigh_alloc(daddr, dev);
if (!neigh) {
spin_unlock_irqrestore(&priv->lock, flags);
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
return;
}
path = __path_find(dev, daddr + 4);
if (!path) {
path = path_rec_create(dev, daddr + 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;
if (ipoib_cm_enabled(dev, neigh->daddr)) {
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);
ipoib_neigh_free(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(daddr));
ipoib_neigh_put(neigh);
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);
ipoib_neigh_put(neigh);
return;
err_list:
list_del(&neigh->list);
err_path:
ipoib_neigh_free(neigh);
err_drop:
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
spin_unlock_irqrestore(&priv->lock, flags);
ipoib_neigh_put(neigh);
}
static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
struct ipoib_cb *cb)
{
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, cb->hwaddr + 4);
if (!path || !path->valid) {
int new_path = 0;
if (!path) {
path = path_rec_create(dev, cb->hwaddr + 4);
new_path = 1;
}
if (path) {
__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(cb->hwaddr));
return;
} else if ((path->query || !path_rec_start(dev, path)) &&
skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
__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 ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
struct ipoib_header *header;
unsigned long flags;
header = (struct ipoib_header *) skb->data;
if (unlikely(cb->hwaddr[4] == 0xff)) {
/* multicast, arrange "if" according to probability */
if ((header->proto != htons(ETH_P_IP)) &&
(header->proto != htons(ETH_P_IPV6)) &&
(header->proto != htons(ETH_P_ARP)) &&
(header->proto != htons(ETH_P_RARP)) &&
(header->proto != htons(ETH_P_TIPC))) {
/* ethertype not supported by IPoIB */
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
/* Add in the P_Key for multicast*/
cb->hwaddr[8] = (priv->pkey >> 8) & 0xff;
cb->hwaddr[9] = priv->pkey & 0xff;
neigh = ipoib_neigh_get(dev, cb->hwaddr);
if (likely(neigh))
goto send_using_neigh;
ipoib_mcast_send(dev, cb->hwaddr, skb);
return NETDEV_TX_OK;
}
/* unicast, arrange "switch" according to probability */
switch (header->proto) {
case htons(ETH_P_IP):
case htons(ETH_P_IPV6):
case htons(ETH_P_TIPC):
neigh = ipoib_neigh_get(dev, cb->hwaddr);
if (unlikely(!neigh)) {
neigh_add_path(skb, cb->hwaddr, dev);
return NETDEV_TX_OK;
}
break;
case htons(ETH_P_ARP):
case htons(ETH_P_RARP):
/* for unicast ARP and RARP should always perform path find */
unicast_arp_send(skb, dev, cb);
return NETDEV_TX_OK;
default:
/* ethertype not supported by IPoIB */
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
send_using_neigh:
/* note we now hold a ref to neigh */
if (ipoib_cm_get(neigh)) {
if (ipoib_cm_up(neigh)) {
ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
goto unref;
}
} else if (neigh->ah) {
ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(cb->hwaddr));
goto unref;
}
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);
}
unref:
ipoib_neigh_put(neigh);
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 ipoib_cb *cb = (struct ipoib_cb *) skb->cb;
header = (struct ipoib_header *) skb_push(skb, sizeof *header);
header->proto = htons(type);
header->reserved = 0;
/*
* we don't rely on dst_entry structure, always stuff the
* destination address into skb->cb so we can figure out where
* to send the packet later.
*/
memcpy(cb->hwaddr, daddr, INFINIBAND_ALEN);
return sizeof *header;
}
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 u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr)
{
/*
* Use only the address parts that contributes to spreading
* The subnet prefix is not used as one can not connect to
* same remote port (GUID) using the same remote QPN via two
* different subnets.
*/
/* qpn octets[1:4) & port GUID octets[12:20) */
u32 *d32 = (u32 *) daddr;
u32 hv;
hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0);
return hv & htbl->mask;
}
struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh *neigh = NULL;
u32 hash_val;
rcu_read_lock_bh();
htbl = rcu_dereference_bh(ntbl->htbl);
if (!htbl)
goto out_unlock;
hash_val = ipoib_addr_hash(htbl, daddr);
for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]);
neigh != NULL;
neigh = rcu_dereference_bh(neigh->hnext)) {
if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
/* found, take one ref on behalf of the caller */
if (!atomic_inc_not_zero(&neigh->refcnt)) {
/* deleted */
neigh = NULL;
goto out_unlock;
}
neigh->alive = jiffies;
goto out_unlock;
}
}
out_unlock:
rcu_read_unlock_bh();
return neigh;
}
static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
{
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
unsigned long neigh_obsolete;
unsigned long dt;
unsigned long flags;
int i;
if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
return;
spin_lock_irqsave(&priv->lock, flags);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&priv->lock));
if (!htbl)
goto out_unlock;
/* neigh is obsolete if it was idle for two GC periods */
dt = 2 * arp_tbl.gc_interval;
neigh_obsolete = jiffies - dt;
/* handle possible race condition */
if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
goto out_unlock;
for (i = 0; i < htbl->size; i++) {
struct ipoib_neigh *neigh;
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
while ((neigh = rcu_dereference_protected(*np,
lockdep_is_held(&priv->lock))) != NULL) {
/* was the neigh idle for two GC periods */
if (time_after(neigh_obsolete, neigh->alive)) {
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&priv->lock)));
/* remove from path/mc list */
list_del(&neigh->list);
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
} else {
np = &neigh->hnext;
}
}
}
out_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
}
static void ipoib_reap_neigh(struct work_struct *work)
{
struct ipoib_dev_priv *priv =
container_of(work, struct ipoib_dev_priv, neigh_reap_task.work);
__ipoib_reap_neigh(priv);
if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task,
arp_tbl.gc_interval);
}
static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr,
struct net_device *dev)
{
struct ipoib_neigh *neigh;
neigh = kzalloc(sizeof *neigh, GFP_ATOMIC);
if (!neigh)
return NULL;
neigh->dev = dev;
memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr));
skb_queue_head_init(&neigh->queue);
INIT_LIST_HEAD(&neigh->list);
ipoib_cm_set(neigh, NULL);
/* one ref on behalf of the caller */
atomic_set(&neigh->refcnt, 1);
return neigh;
}
struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh *neigh;
u32 hash_val;
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&priv->lock));
if (!htbl) {
neigh = NULL;
goto out_unlock;
}
/* need to add a new neigh, but maybe some other thread succeeded?
* recalc hash, maybe hash resize took place so we do a search
*/
hash_val = ipoib_addr_hash(htbl, daddr);
for (neigh = rcu_dereference_protected(htbl->buckets[hash_val],
lockdep_is_held(&priv->lock));
neigh != NULL;
neigh = rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&priv->lock))) {
if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) {
/* found, take one ref on behalf of the caller */
if (!atomic_inc_not_zero(&neigh->refcnt)) {
/* deleted */
neigh = NULL;
break;
}
neigh->alive = jiffies;
goto out_unlock;
}
}
neigh = ipoib_neigh_ctor(daddr, dev);
if (!neigh)
goto out_unlock;
/* one ref on behalf of the hash table */
atomic_inc(&neigh->refcnt);
neigh->alive = jiffies;
/* put in hash */
rcu_assign_pointer(neigh->hnext,
rcu_dereference_protected(htbl->buckets[hash_val],
lockdep_is_held(&priv->lock)));
rcu_assign_pointer(htbl->buckets[hash_val], neigh);
atomic_inc(&ntbl->entries);
out_unlock:
return neigh;
}
void ipoib_neigh_dtor(struct ipoib_neigh *neigh)
{
/* neigh reference count was dropprd to zero */
struct net_device *dev = neigh->dev;
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct sk_buff *skb;
if (neigh->ah)
ipoib_put_ah(neigh->ah);
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));
ipoib_dbg(netdev_priv(dev),
"neigh free for %06x %pI6\n",
IPOIB_QPN(neigh->daddr),
neigh->daddr + 4);
kfree(neigh);
if (atomic_dec_and_test(&priv->ntbl.entries)) {
if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags))
complete(&priv->ntbl.flushed);
}
}
static void ipoib_neigh_reclaim(struct rcu_head *rp)
{
/* Called as a result of removal from hash table */
struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu);
/* note TX context may hold another ref */
ipoib_neigh_put(neigh);
}
void ipoib_neigh_free(struct ipoib_neigh *neigh)
{
struct net_device *dev = neigh->dev;
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh __rcu **np;
struct ipoib_neigh *n;
u32 hash_val;
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&priv->lock));
if (!htbl)
return;
hash_val = ipoib_addr_hash(htbl, neigh->daddr);
np = &htbl->buckets[hash_val];
for (n = rcu_dereference_protected(*np,
lockdep_is_held(&priv->lock));
n != NULL;
n = rcu_dereference_protected(*np,
lockdep_is_held(&priv->lock))) {
if (n == neigh) {
/* found */
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&priv->lock)));
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
return;
} else {
np = &n->hnext;
}
}
}
static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv)
{
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
struct ipoib_neigh **buckets;
u32 size;
clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
ntbl->htbl = NULL;
htbl = kzalloc(sizeof(*htbl), GFP_KERNEL);
if (!htbl)
return -ENOMEM;
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
size = roundup_pow_of_two(arp_tbl.gc_thresh3);
buckets = kzalloc(size * sizeof(*buckets), GFP_KERNEL);
if (!buckets) {
kfree(htbl);
return -ENOMEM;
}
htbl->size = size;
htbl->mask = (size - 1);
htbl->buckets = buckets;
ntbl->htbl = htbl;
htbl->ntbl = ntbl;
atomic_set(&ntbl->entries, 0);
/* start garbage collection */
clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task,
arp_tbl.gc_interval);
return 0;
}
static void neigh_hash_free_rcu(struct rcu_head *head)
{
struct ipoib_neigh_hash *htbl = container_of(head,
struct ipoib_neigh_hash,
rcu);
struct ipoib_neigh __rcu **buckets = htbl->buckets;
struct ipoib_neigh_table *ntbl = htbl->ntbl;
kfree(buckets);
kfree(htbl);
complete(&ntbl->deleted);
}
void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
unsigned long flags;
int i;
/* remove all neigh connected to a given path or mcast */
spin_lock_irqsave(&priv->lock, flags);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&priv->lock));
if (!htbl)
goto out_unlock;
for (i = 0; i < htbl->size; i++) {
struct ipoib_neigh *neigh;
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
while ((neigh = rcu_dereference_protected(*np,
lockdep_is_held(&priv->lock))) != NULL) {
/* delete neighs belong to this parent */
if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) {
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&priv->lock)));
/* remove from parent list */
list_del(&neigh->list);
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
} else {
np = &neigh->hnext;
}
}
}
out_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
}
static void ipoib_flush_neighs(struct ipoib_dev_priv *priv)
{
struct ipoib_neigh_table *ntbl = &priv->ntbl;
struct ipoib_neigh_hash *htbl;
unsigned long flags;
int i, wait_flushed = 0;
init_completion(&priv->ntbl.flushed);
spin_lock_irqsave(&priv->lock, flags);
htbl = rcu_dereference_protected(ntbl->htbl,
lockdep_is_held(&priv->lock));
if (!htbl)
goto out_unlock;
wait_flushed = atomic_read(&priv->ntbl.entries);
if (!wait_flushed)
goto free_htbl;
for (i = 0; i < htbl->size; i++) {
struct ipoib_neigh *neigh;
struct ipoib_neigh __rcu **np = &htbl->buckets[i];
while ((neigh = rcu_dereference_protected(*np,
lockdep_is_held(&priv->lock))) != NULL) {
rcu_assign_pointer(*np,
rcu_dereference_protected(neigh->hnext,
lockdep_is_held(&priv->lock)));
/* remove from path/mc list */
list_del(&neigh->list);
call_rcu(&neigh->rcu, ipoib_neigh_reclaim);
}
}
free_htbl:
rcu_assign_pointer(ntbl->htbl, NULL);
call_rcu(&htbl->rcu, neigh_hash_free_rcu);
out_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
if (wait_flushed)
wait_for_completion(&priv->ntbl.flushed);
}
static void ipoib_neigh_hash_uninit(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
int stopped;
ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n");
init_completion(&priv->ntbl.deleted);
set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags);
/* Stop GC if called at init fail need to cancel work */
stopped = test_and_set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
if (!stopped)
cancel_delayed_work(&priv->neigh_reap_task);
ipoib_flush_neighs(priv);
wait_for_completion(&priv->ntbl.deleted);
}
int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
if (ipoib_neigh_hash_init(priv) < 0)
goto out;
/* 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_neigh_hash_cleanup;
}
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_neigh_hash_cleanup:
ipoib_neigh_hash_uninit(dev);
out:
return -ENOMEM;
}
void ipoib_dev_cleanup(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
LIST_HEAD(head);
ASSERT_RTNL();
ipoib_delete_debug_files(dev);
/* Delete any child interfaces first */
list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
/* Stop GC on child */
set_bit(IPOIB_STOP_NEIGH_GC, &cpriv->flags);
cancel_delayed_work(&cpriv->neigh_reap_task);
unregister_netdevice_queue(cpriv->dev, &head);
}
unregister_netdevice_many(&head);
ipoib_ib_dev_cleanup(dev);
kfree(priv->rx_ring);
vfree(priv->tx_ring);
priv->rx_ring = NULL;
priv->tx_ring = NULL;
ipoib_neigh_hash_uninit(dev);
}
static const struct header_ops ipoib_header_ops = {
.create = ipoib_hard_header,
};
static const struct net_device_ops ipoib_netdev_ops = {
.ndo_uninit = ipoib_uninit,
.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,
};
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;
dev->hard_header_len = IPOIB_ENCAP_LEN;
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);
INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh);
}
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));
}
void ipoib_set_umcast(struct net_device *ndev, int umcast_val)
{
struct ipoib_dev_priv *priv = netdev_priv(ndev);
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);
}
static ssize_t set_umcast(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long umcast_val = simple_strtoul(buf, NULL, 0);
ipoib_set_umcast(to_net_dev(dev), umcast_val);
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);
/* Stop GC if started before flush */
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
cancel_delayed_work(&priv->neigh_reap_task);
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);
if (!dev_list)
return;
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();
/* Stop GC */
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
cancel_delayed_work(&priv->neigh_reap_task);
flush_workqueue(ipoib_workqueue);
unregister_netdev(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;
ret = ipoib_netlink_init();
if (ret)
goto err_client;
return 0;
err_client:
ib_unregister_client(&ipoib_client);
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)
{
ipoib_netlink_fini();
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);