Commit a91eba5b authored by David S. Miller's avatar David S. Miller
parents b8273570 0aea51c3
/* A simple network driver using virtio. /* A network driver using virtio.
* *
* Copyright 2007 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation * Copyright 2007 Rusty Russell <rusty@rustcorp.com.au> IBM Corporation
* *
...@@ -48,19 +48,9 @@ struct virtnet_info ...@@ -48,19 +48,9 @@ struct virtnet_info
struct napi_struct napi; struct napi_struct napi;
unsigned int status; unsigned int status;
/* The skb we couldn't send because buffers were full. */
struct sk_buff *last_xmit_skb;
/* If we need to free in a timer, this is it. */
struct timer_list xmit_free_timer;
/* Number of input buffers, and max we've ever had. */ /* Number of input buffers, and max we've ever had. */
unsigned int num, max; unsigned int num, max;
/* For cleaning up after transmission. */
struct tasklet_struct tasklet;
bool free_in_tasklet;
/* I like... big packets and I cannot lie! */ /* I like... big packets and I cannot lie! */
bool big_packets; bool big_packets;
...@@ -78,9 +68,17 @@ struct virtnet_info ...@@ -78,9 +68,17 @@ struct virtnet_info
struct page *pages; struct page *pages;
}; };
static inline void *skb_vnet_hdr(struct sk_buff *skb) struct skb_vnet_hdr {
union {
struct virtio_net_hdr hdr;
struct virtio_net_hdr_mrg_rxbuf mhdr;
};
unsigned int num_sg;
};
static inline struct skb_vnet_hdr *skb_vnet_hdr(struct sk_buff *skb)
{ {
return (struct virtio_net_hdr *)skb->cb; return (struct skb_vnet_hdr *)skb->cb;
} }
static void give_a_page(struct virtnet_info *vi, struct page *page) static void give_a_page(struct virtnet_info *vi, struct page *page)
...@@ -119,17 +117,13 @@ static void skb_xmit_done(struct virtqueue *svq) ...@@ -119,17 +117,13 @@ static void skb_xmit_done(struct virtqueue *svq)
/* We were probably waiting for more output buffers. */ /* We were probably waiting for more output buffers. */
netif_wake_queue(vi->dev); netif_wake_queue(vi->dev);
/* Make sure we re-xmit last_xmit_skb: if there are no more packets
* queued, start_xmit won't be called. */
tasklet_schedule(&vi->tasklet);
} }
static void receive_skb(struct net_device *dev, struct sk_buff *skb, static void receive_skb(struct net_device *dev, struct sk_buff *skb,
unsigned len) unsigned len)
{ {
struct virtnet_info *vi = netdev_priv(dev); struct virtnet_info *vi = netdev_priv(dev);
struct virtio_net_hdr *hdr = skb_vnet_hdr(skb); struct skb_vnet_hdr *hdr = skb_vnet_hdr(skb);
int err; int err;
int i; int i;
...@@ -140,7 +134,6 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -140,7 +134,6 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
} }
if (vi->mergeable_rx_bufs) { if (vi->mergeable_rx_bufs) {
struct virtio_net_hdr_mrg_rxbuf *mhdr = skb_vnet_hdr(skb);
unsigned int copy; unsigned int copy;
char *p = page_address(skb_shinfo(skb)->frags[0].page); char *p = page_address(skb_shinfo(skb)->frags[0].page);
...@@ -148,8 +141,8 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -148,8 +141,8 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
len = PAGE_SIZE; len = PAGE_SIZE;
len -= sizeof(struct virtio_net_hdr_mrg_rxbuf); len -= sizeof(struct virtio_net_hdr_mrg_rxbuf);
memcpy(hdr, p, sizeof(*mhdr)); memcpy(&hdr->mhdr, p, sizeof(hdr->mhdr));
p += sizeof(*mhdr); p += sizeof(hdr->mhdr);
copy = len; copy = len;
if (copy > skb_tailroom(skb)) if (copy > skb_tailroom(skb))
...@@ -164,13 +157,13 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -164,13 +157,13 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
skb_shinfo(skb)->nr_frags--; skb_shinfo(skb)->nr_frags--;
} else { } else {
skb_shinfo(skb)->frags[0].page_offset += skb_shinfo(skb)->frags[0].page_offset +=
sizeof(*mhdr) + copy; sizeof(hdr->mhdr) + copy;
skb_shinfo(skb)->frags[0].size = len; skb_shinfo(skb)->frags[0].size = len;
skb->data_len += len; skb->data_len += len;
skb->len += len; skb->len += len;
} }
while (--mhdr->num_buffers) { while (--hdr->mhdr.num_buffers) {
struct sk_buff *nskb; struct sk_buff *nskb;
i = skb_shinfo(skb)->nr_frags; i = skb_shinfo(skb)->nr_frags;
...@@ -184,7 +177,7 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -184,7 +177,7 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
nskb = vi->rvq->vq_ops->get_buf(vi->rvq, &len); nskb = vi->rvq->vq_ops->get_buf(vi->rvq, &len);
if (!nskb) { if (!nskb) {
pr_debug("%s: rx error: %d buffers missing\n", pr_debug("%s: rx error: %d buffers missing\n",
dev->name, mhdr->num_buffers); dev->name, hdr->mhdr.num_buffers);
dev->stats.rx_length_errors++; dev->stats.rx_length_errors++;
goto drop; goto drop;
} }
...@@ -205,7 +198,7 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -205,7 +198,7 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
skb->len += len; skb->len += len;
} }
} else { } else {
len -= sizeof(struct virtio_net_hdr); len -= sizeof(hdr->hdr);
if (len <= MAX_PACKET_LEN) if (len <= MAX_PACKET_LEN)
trim_pages(vi, skb); trim_pages(vi, skb);
...@@ -223,9 +216,11 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -223,9 +216,11 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
dev->stats.rx_bytes += skb->len; dev->stats.rx_bytes += skb->len;
dev->stats.rx_packets++; dev->stats.rx_packets++;
if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
pr_debug("Needs csum!\n"); pr_debug("Needs csum!\n");
if (!skb_partial_csum_set(skb,hdr->csum_start,hdr->csum_offset)) if (!skb_partial_csum_set(skb,
hdr->hdr.csum_start,
hdr->hdr.csum_offset))
goto frame_err; goto frame_err;
} }
...@@ -233,9 +228,9 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -233,9 +228,9 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
pr_debug("Receiving skb proto 0x%04x len %i type %i\n", pr_debug("Receiving skb proto 0x%04x len %i type %i\n",
ntohs(skb->protocol), skb->len, skb->pkt_type); ntohs(skb->protocol), skb->len, skb->pkt_type);
if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) { if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
pr_debug("GSO!\n"); pr_debug("GSO!\n");
switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
case VIRTIO_NET_HDR_GSO_TCPV4: case VIRTIO_NET_HDR_GSO_TCPV4:
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
break; break;
...@@ -248,14 +243,14 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb, ...@@ -248,14 +243,14 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
default: default:
if (net_ratelimit()) if (net_ratelimit())
printk(KERN_WARNING "%s: bad gso type %u.\n", printk(KERN_WARNING "%s: bad gso type %u.\n",
dev->name, hdr->gso_type); dev->name, hdr->hdr.gso_type);
goto frame_err; goto frame_err;
} }
if (hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN) if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)
skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN; skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
skb_shinfo(skb)->gso_size = hdr->gso_size; skb_shinfo(skb)->gso_size = hdr->hdr.gso_size;
if (skb_shinfo(skb)->gso_size == 0) { if (skb_shinfo(skb)->gso_size == 0) {
if (net_ratelimit()) if (net_ratelimit())
printk(KERN_WARNING "%s: zero gso size.\n", printk(KERN_WARNING "%s: zero gso size.\n",
...@@ -285,8 +280,8 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp) ...@@ -285,8 +280,8 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp)
bool oom = false; bool oom = false;
sg_init_table(sg, 2+MAX_SKB_FRAGS); sg_init_table(sg, 2+MAX_SKB_FRAGS);
for (;;) { do {
struct virtio_net_hdr *hdr; struct skb_vnet_hdr *hdr;
skb = netdev_alloc_skb(vi->dev, MAX_PACKET_LEN + NET_IP_ALIGN); skb = netdev_alloc_skb(vi->dev, MAX_PACKET_LEN + NET_IP_ALIGN);
if (unlikely(!skb)) { if (unlikely(!skb)) {
...@@ -298,7 +293,7 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp) ...@@ -298,7 +293,7 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp)
skb_put(skb, MAX_PACKET_LEN); skb_put(skb, MAX_PACKET_LEN);
hdr = skb_vnet_hdr(skb); hdr = skb_vnet_hdr(skb);
sg_set_buf(sg, hdr, sizeof(*hdr)); sg_set_buf(sg, &hdr->hdr, sizeof(hdr->hdr));
if (vi->big_packets) { if (vi->big_packets) {
for (i = 0; i < MAX_SKB_FRAGS; i++) { for (i = 0; i < MAX_SKB_FRAGS; i++) {
...@@ -328,7 +323,7 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp) ...@@ -328,7 +323,7 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp)
break; break;
} }
vi->num++; vi->num++;
} } while (err >= num);
if (unlikely(vi->num > vi->max)) if (unlikely(vi->num > vi->max))
vi->max = vi->num; vi->max = vi->num;
vi->rvq->vq_ops->kick(vi->rvq); vi->rvq->vq_ops->kick(vi->rvq);
...@@ -346,7 +341,7 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp) ...@@ -346,7 +341,7 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp)
if (!vi->mergeable_rx_bufs) if (!vi->mergeable_rx_bufs)
return try_fill_recv_maxbufs(vi, gfp); return try_fill_recv_maxbufs(vi, gfp);
for (;;) { do {
skb_frag_t *f; skb_frag_t *f;
skb = netdev_alloc_skb(vi->dev, GOOD_COPY_LEN + NET_IP_ALIGN); skb = netdev_alloc_skb(vi->dev, GOOD_COPY_LEN + NET_IP_ALIGN);
...@@ -380,7 +375,7 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp) ...@@ -380,7 +375,7 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp)
break; break;
} }
vi->num++; vi->num++;
} } while (err > 0);
if (unlikely(vi->num > vi->max)) if (unlikely(vi->num > vi->max))
vi->max = vi->num; vi->max = vi->num;
vi->rvq->vq_ops->kick(vi->rvq); vi->rvq->vq_ops->kick(vi->rvq);
...@@ -448,42 +443,26 @@ again: ...@@ -448,42 +443,26 @@ again:
return received; return received;
} }
static void free_old_xmit_skbs(struct virtnet_info *vi) static unsigned int free_old_xmit_skbs(struct virtnet_info *vi)
{ {
struct sk_buff *skb; struct sk_buff *skb;
unsigned int len; unsigned int len, tot_sgs = 0;
while ((skb = vi->svq->vq_ops->get_buf(vi->svq, &len)) != NULL) { while ((skb = vi->svq->vq_ops->get_buf(vi->svq, &len)) != NULL) {
pr_debug("Sent skb %p\n", skb); pr_debug("Sent skb %p\n", skb);
__skb_unlink(skb, &vi->send); __skb_unlink(skb, &vi->send);
vi->dev->stats.tx_bytes += skb->len; vi->dev->stats.tx_bytes += skb->len;
vi->dev->stats.tx_packets++; vi->dev->stats.tx_packets++;
tot_sgs += skb_vnet_hdr(skb)->num_sg;
kfree_skb(skb); kfree_skb(skb);
} }
} return tot_sgs;
/* If the virtio transport doesn't always notify us when all in-flight packets
* are consumed, we fall back to using this function on a timer to free them. */
static void xmit_free(unsigned long data)
{
struct virtnet_info *vi = (void *)data;
netif_tx_lock(vi->dev);
free_old_xmit_skbs(vi);
if (!skb_queue_empty(&vi->send))
mod_timer(&vi->xmit_free_timer, jiffies + (HZ/10));
netif_tx_unlock(vi->dev);
} }
static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
{ {
int num, err;
struct scatterlist sg[2+MAX_SKB_FRAGS]; struct scatterlist sg[2+MAX_SKB_FRAGS];
struct virtio_net_hdr_mrg_rxbuf *mhdr = skb_vnet_hdr(skb); struct skb_vnet_hdr *hdr = skb_vnet_hdr(skb);
struct virtio_net_hdr *hdr = skb_vnet_hdr(skb);
const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest; const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest;
sg_init_table(sg, 2+MAX_SKB_FRAGS); sg_init_table(sg, 2+MAX_SKB_FRAGS);
...@@ -491,108 +470,89 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) ...@@ -491,108 +470,89 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest); pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest);
if (skb->ip_summed == CHECKSUM_PARTIAL) { if (skb->ip_summed == CHECKSUM_PARTIAL) {
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; hdr->hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = skb->csum_start - skb_headroom(skb); hdr->hdr.csum_start = skb->csum_start - skb_headroom(skb);
hdr->csum_offset = skb->csum_offset; hdr->hdr.csum_offset = skb->csum_offset;
} else { } else {
hdr->flags = 0; hdr->hdr.flags = 0;
hdr->csum_offset = hdr->csum_start = 0; hdr->hdr.csum_offset = hdr->hdr.csum_start = 0;
} }
if (skb_is_gso(skb)) { if (skb_is_gso(skb)) {
hdr->hdr_len = skb_headlen(skb); hdr->hdr.hdr_len = skb_headlen(skb);
hdr->gso_size = skb_shinfo(skb)->gso_size; hdr->hdr.gso_size = skb_shinfo(skb)->gso_size;
if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4)
hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP; hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else else
BUG(); BUG();
if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN) if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN)
hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN; hdr->hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else { } else {
hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
hdr->gso_size = hdr->hdr_len = 0; hdr->hdr.gso_size = hdr->hdr.hdr_len = 0;
} }
mhdr->num_buffers = 0; hdr->mhdr.num_buffers = 0;
/* Encode metadata header at front. */ /* Encode metadata header at front. */
if (vi->mergeable_rx_bufs) if (vi->mergeable_rx_bufs)
sg_set_buf(sg, mhdr, sizeof(*mhdr)); sg_set_buf(sg, &hdr->mhdr, sizeof(hdr->mhdr));
else else
sg_set_buf(sg, hdr, sizeof(*hdr)); sg_set_buf(sg, &hdr->hdr, sizeof(hdr->hdr));
num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1; hdr->num_sg = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1;
return vi->svq->vq_ops->add_buf(vi->svq, sg, hdr->num_sg, 0, skb);
err = vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb);
if (err >= 0 && !vi->free_in_tasklet)
mod_timer(&vi->xmit_free_timer, jiffies + (HZ/10));
return err;
}
static void xmit_tasklet(unsigned long data)
{
struct virtnet_info *vi = (void *)data;
netif_tx_lock_bh(vi->dev);
if (vi->last_xmit_skb && xmit_skb(vi, vi->last_xmit_skb) >= 0) {
vi->svq->vq_ops->kick(vi->svq);
vi->last_xmit_skb = NULL;
}
if (vi->free_in_tasklet)
free_old_xmit_skbs(vi);
netif_tx_unlock_bh(vi->dev);
} }
static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
{ {
struct virtnet_info *vi = netdev_priv(dev); struct virtnet_info *vi = netdev_priv(dev);
int capacity;
again: again:
/* Free up any pending old buffers before queueing new ones. */ /* Free up any pending old buffers before queueing new ones. */
free_old_xmit_skbs(vi); free_old_xmit_skbs(vi);
/* If we has a buffer left over from last time, send it now. */
if (unlikely(vi->last_xmit_skb) &&
xmit_skb(vi, vi->last_xmit_skb) < 0)
goto stop_queue;
vi->last_xmit_skb = NULL;
/* Put new one in send queue and do transmit */ /* Put new one in send queue and do transmit */
if (likely(skb)) { __skb_queue_head(&vi->send, skb);
__skb_queue_head(&vi->send, skb); capacity = xmit_skb(vi, skb);
if (xmit_skb(vi, skb) < 0) {
vi->last_xmit_skb = skb; /* This can happen with OOM and indirect buffers. */
skb = NULL; if (unlikely(capacity < 0)) {
goto stop_queue; netif_stop_queue(dev);
dev_warn(&dev->dev, "Unexpected full queue\n");
if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
vi->svq->vq_ops->disable_cb(vi->svq);
netif_start_queue(dev);
goto again;
} }
return NETDEV_TX_BUSY;
} }
done:
vi->svq->vq_ops->kick(vi->svq);
return NETDEV_TX_OK;
stop_queue: vi->svq->vq_ops->kick(vi->svq);
pr_debug("%s: virtio not prepared to send\n", dev->name); /* Don't wait up for transmitted skbs to be freed. */
netif_stop_queue(dev); skb_orphan(skb);
nf_reset(skb);
/* Activate callback for using skbs: if this returns false it
* means some were used in the meantime. */ /* Apparently nice girls don't return TX_BUSY; stop the queue
if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) { * before it gets out of hand. Naturally, this wastes entries. */
vi->svq->vq_ops->disable_cb(vi->svq); if (capacity < 2+MAX_SKB_FRAGS) {
netif_start_queue(dev); netif_stop_queue(dev);
goto again; if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
} /* More just got used, free them then recheck. */
if (skb) { capacity += free_old_xmit_skbs(vi);
/* Drop this skb: we only queue one. */ if (capacity >= 2+MAX_SKB_FRAGS) {
vi->dev->stats.tx_dropped++; netif_start_queue(dev);
kfree_skb(skb); vi->svq->vq_ops->disable_cb(vi->svq);
}
}
} }
goto done;
return NETDEV_TX_OK;
} }
static int virtnet_set_mac_address(struct net_device *dev, void *p) static int virtnet_set_mac_address(struct net_device *dev, void *p)
...@@ -925,10 +885,6 @@ static int virtnet_probe(struct virtio_device *vdev) ...@@ -925,10 +885,6 @@ static int virtnet_probe(struct virtio_device *vdev)
vi->pages = NULL; vi->pages = NULL;
INIT_DELAYED_WORK(&vi->refill, refill_work); INIT_DELAYED_WORK(&vi->refill, refill_work);
/* If they give us a callback when all buffers are done, we don't need
* the timer. */
vi->free_in_tasklet = virtio_has_feature(vdev,VIRTIO_F_NOTIFY_ON_EMPTY);
/* If we can receive ANY GSO packets, we must allocate large ones. */ /* If we can receive ANY GSO packets, we must allocate large ones. */
if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4)
|| virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) || virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6)
...@@ -960,11 +916,6 @@ static int virtnet_probe(struct virtio_device *vdev) ...@@ -960,11 +916,6 @@ static int virtnet_probe(struct virtio_device *vdev)
skb_queue_head_init(&vi->recv); skb_queue_head_init(&vi->recv);
skb_queue_head_init(&vi->send); skb_queue_head_init(&vi->send);
tasklet_init(&vi->tasklet, xmit_tasklet, (unsigned long)vi);
if (!vi->free_in_tasklet)
setup_timer(&vi->xmit_free_timer, xmit_free, (unsigned long)vi);
err = register_netdev(dev); err = register_netdev(dev);
if (err) { if (err) {
pr_debug("virtio_net: registering device failed\n"); pr_debug("virtio_net: registering device failed\n");
...@@ -1005,9 +956,6 @@ static void virtnet_remove(struct virtio_device *vdev) ...@@ -1005,9 +956,6 @@ static void virtnet_remove(struct virtio_device *vdev)
/* Stop all the virtqueues. */ /* Stop all the virtqueues. */
vdev->config->reset(vdev); vdev->config->reset(vdev);
if (!vi->free_in_tasklet)
del_timer_sync(&vi->xmit_free_timer);
/* Free our skbs in send and recv queues, if any. */ /* Free our skbs in send and recv queues, if any. */
while ((skb = __skb_dequeue(&vi->recv)) != NULL) { while ((skb = __skb_dequeue(&vi->recv)) != NULL) {
kfree_skb(skb); kfree_skb(skb);
...@@ -1041,7 +989,6 @@ static unsigned int features[] = { ...@@ -1041,7 +989,6 @@ static unsigned int features[] = {
VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_UFO, VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_UFO,
VIRTIO_NET_F_MRG_RXBUF, VIRTIO_NET_F_STATUS, VIRTIO_NET_F_CTRL_VQ, VIRTIO_NET_F_MRG_RXBUF, VIRTIO_NET_F_STATUS, VIRTIO_NET_F_CTRL_VQ,
VIRTIO_NET_F_CTRL_RX, VIRTIO_NET_F_CTRL_VLAN, VIRTIO_NET_F_CTRL_RX, VIRTIO_NET_F_CTRL_VLAN,
VIRTIO_F_NOTIFY_ON_EMPTY,
}; };
static struct virtio_driver virtio_net = { static struct virtio_driver virtio_net = {
......
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