redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

virtio_net: pass vi around 

Too many places poke at [rs]q->vq->vdev->priv just to get
the vi structure.  Let's just pass the pointer around: seems
cleaner, and might even be faster.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
hifive-unleashed-5.1
Michael S. Tsirkin 2014-10-24 00:12:10 +03:00
parent 38f37b578f
commit 946fa5647b
1 changed files with 20 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/net/virtio_net.c
View File

@ -241,11 +241,11 @@ static unsigned long mergeable_buf_to_ctx(void *buf, unsigned int truesize)
}
/* Called from bottom half context */
static struct sk_buff *page_to_skb(struct receive_queue *rq,
static struct sk_buff *page_to_skb(struct virtnet_info *vi,
struct receive_queue *rq,
struct page *page, unsigned int offset,
unsigned int len, unsigned int truesize)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
struct sk_buff *skb;
struct skb_vnet_hdr *hdr;
unsigned int copy, hdr_len, hdr_padded_len;
@ -328,12 +328,13 @@ static struct sk_buff *receive_small(void *buf, unsigned int len)
}
static struct sk_buff *receive_big(struct net_device *dev,
struct virtnet_info *vi,
struct receive_queue *rq,
void *buf,
unsigned int len)
{
struct page *page = buf;
struct sk_buff *skb = page_to_skb(rq, page, 0, len, PAGE_SIZE);
struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE);
if (unlikely(!skb))
goto err;
@ -359,7 +360,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
int offset = buf - page_address(page);
unsigned int truesize = max(len, mergeable_ctx_to_buf_truesize(ctx));
struct sk_buff *head_skb = page_to_skb(rq, page, offset, len, truesize);
struct sk_buff *head_skb = page_to_skb(vi, rq, page, offset, len,
truesize);
struct sk_buff *curr_skb = head_skb;
if (unlikely(!curr_skb))
@ -433,9 +435,9 @@ err_buf:
return NULL;
}
static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
void *buf, unsigned int len)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
struct net_device *dev = vi->dev;
struct virtnet_stats *stats = this_cpu_ptr(vi->stats);
struct sk_buff *skb;
@ -459,7 +461,7 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
if (vi->mergeable_rx_bufs)
skb = receive_mergeable(dev, vi, rq, (unsigned long)buf, len);
else if (vi->big_packets)
skb = receive_big(dev, rq, buf, len);
skb = receive_big(dev, vi, rq, buf, len);
else
skb = receive_small(buf, len);
@ -539,9 +541,9 @@ frame_err:
dev_kfree_skb(skb);
}
static int add_recvbuf_small(struct receive_queue *rq, gfp_t gfp)
static int add_recvbuf_small(struct virtnet_info *vi, struct receive_queue *rq,
gfp_t gfp)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
struct sk_buff *skb;
struct skb_vnet_hdr *hdr;
int err;
@ -664,9 +666,9 @@ static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp)
* before we're receiving packets, or from refill_work which is
* careful to disable receiving (using napi_disable).
*/
static bool try_fill_recv(struct receive_queue *rq, gfp_t gfp)
static bool try_fill_recv(struct virtnet_info *vi, struct receive_queue *rq,
gfp_t gfp)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
int err;
bool oom;
@ -677,7 +679,7 @@ static bool try_fill_recv(struct receive_queue *rq, gfp_t gfp)
else if (vi->big_packets)
err = add_recvbuf_big(rq, gfp);
else
err = add_recvbuf_small(rq, gfp);
err = add_recvbuf_small(vi, rq, gfp);
oom = err == -ENOMEM;
if (err)
@ -726,7 +728,7 @@ static void refill_work(struct work_struct *work)
struct receive_queue *rq = &vi->rq[i];
napi_disable(&rq->napi);
still_empty = !try_fill_recv(rq, GFP_KERNEL);
still_empty = !try_fill_recv(vi, rq, GFP_KERNEL);
virtnet_napi_enable(rq);
/* In theory, this can happen: if we don't get any buffers in
@ -745,12 +747,12 @@ static int virtnet_receive(struct receive_queue *rq, int budget)
while (received < budget &&
(buf = virtqueue_get_buf(rq->vq, &len)) != NULL) {
receive_buf(rq, buf, len);
receive_buf(vi, rq, buf, len);
received++;
}
if (rq->vq->num_free > virtqueue_get_vring_size(rq->vq) / 2) {
if (!try_fill_recv(rq, GFP_ATOMIC))
if (!try_fill_recv(vi, rq, GFP_ATOMIC))
schedule_delayed_work(&vi->refill, 0);
}
@ -826,7 +828,7 @@ static int virtnet_open(struct net_device *dev)
for (i = 0; i < vi->max_queue_pairs; i++) {
if (i < vi->curr_queue_pairs)
/* Make sure we have some buffers: if oom use wq. */
if (!try_fill_recv(&vi->rq[i], GFP_KERNEL))
if (!try_fill_recv(vi, &vi->rq[i], GFP_KERNEL))
schedule_delayed_work(&vi->refill, 0);
virtnet_napi_enable(&vi->rq[i]);
}
@ -1851,7 +1853,7 @@ static int virtnet_probe(struct virtio_device *vdev)
/* Last of all, set up some receive buffers. */
for (i = 0; i < vi->curr_queue_pairs; i++) {
try_fill_recv(&vi->rq[i], GFP_KERNEL);
try_fill_recv(vi, &vi->rq[i], GFP_KERNEL);
/* If we didn't even get one input buffer, we're useless. */
if (vi->rq[i].vq->num_free ==
@ -1971,7 +1973,7 @@ static int virtnet_restore(struct virtio_device *vdev)
if (netif_running(vi->dev)) {
for (i = 0; i < vi->curr_queue_pairs; i++)
if (!try_fill_recv(&vi->rq[i], GFP_KERNEL))
if (!try_fill_recv(vi, &vi->rq[i], GFP_KERNEL))
schedule_delayed_work(&vi->refill, 0);
for (i = 0; i < vi->max_queue_pairs; i++)