Skip to content

L
linux
Commit e9d7417b authored by Jason Wang's avatar Jason Wang Committed by David S. Miller
Browse files
Options

virtio-net: separate fields of sending/receiving queue from virtnet_info 

To support multiqueue transmitq/receiveq, the first step is to separate queue
related structure from virtnet_info. This patch introduce send_queue and
receive_queue structure and use the pointer to them as the parameter in
functions handling sending/receiving.
Signed-off-by: default avatarKrishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0afb1666
Show whitespace changes
Inline Side-by-side
Showing with 158 additions and 124 deletions
drivers/net/virtio_net.c
View file @ e9d7417b
......@@ -51,16 +51,40 @@ struct virtnet_stats {
u64 rx_packets;
};
struct virtnet_info {
struct virtio_device *vdev;
struct virtqueue *rvq, *svq, *cvq;
struct net_device *dev;
/* Internal representation of a send virtqueue */
struct send_queue {
/* Virtqueue associated with this send _queue */
struct virtqueue *vq;
/* TX: fragments + linear part + virtio header */
struct scatterlist sg[MAX_SKB_FRAGS + 2];
};
/* Internal representation of a receive virtqueue */
struct receive_queue {
/* Virtqueue associated with this receive_queue */
struct virtqueue *vq;
struct napi_struct napi;
unsigned int status;
/* Number of input buffers, and max we've ever had. */
unsigned int num, max;
/* Chain pages by the private ptr. */
struct page *pages;
/* RX: fragments + linear part + virtio header */
struct scatterlist sg[MAX_SKB_FRAGS + 2];
};
struct virtnet_info {
struct virtio_device *vdev;
struct virtqueue *cvq;
struct net_device *dev;
struct send_queue sq;
struct receive_queue rq;
unsigned int status;
/* I like... big packets and I cannot lie! */
bool big_packets;
......@@ -81,13 +105,6 @@ struct virtnet_info {
/* Lock for config space updates */
struct mutex config_lock;
/* Chain pages by the private ptr. */
struct page *pages;
/* fragments + linear part + virtio header */
struct scatterlist rx_sg[MAX_SKB_FRAGS + 2];
struct scatterlist tx_sg[MAX_SKB_FRAGS + 2];
};
struct skb_vnet_hdr {
......@@ -117,22 +134,22 @@ static inline struct skb_vnet_hdr *skb_vnet_hdr(struct sk_buff *skb)
* private is used to chain pages for big packets, put the whole
* most recent used list in the beginning for reuse
*/
static void give_pages(struct virtnet_info *vi, struct page *page)
static void give_pages(struct receive_queue *rq, struct page *page)
{
struct page *end;
/* Find end of list, sew whole thing into vi->pages. */
/* Find end of list, sew whole thing into vi->rq.pages. */
for (end = page; end->private; end = (struct page *)end->private);
end->private = (unsigned long)vi->pages;
vi->pages = page;
end->private = (unsigned long)rq->pages;
rq->pages = page;
}
static struct page *get_a_page(struct virtnet_info *vi, gfp_t gfp_mask)
static struct page *get_a_page(struct receive_queue *rq, gfp_t gfp_mask)
{
struct page *p = vi->pages;
struct page *p = rq->pages;
if (p) {
vi->pages = (struct page *)p->private;
rq->pages = (struct page *)p->private;
/* clear private here, it is used to chain pages */
p->private = 0;
} else
......@@ -140,12 +157,12 @@ static struct page *get_a_page(struct virtnet_info *vi, gfp_t gfp_mask)
return p;
}
static void skb_xmit_done(struct virtqueue *svq)
static void skb_xmit_done(struct virtqueue *vq)
{
struct virtnet_info *vi = svq->vdev->priv;
struct virtnet_info *vi = vq->vdev->priv;
/* Suppress further interrupts. */
virtqueue_disable_cb(svq);
virtqueue_disable_cb(vq);
/* We were probably waiting for more output buffers. */
netif_wake_queue(vi->dev);
......@@ -167,9 +184,10 @@ static void set_skb_frag(struct sk_buff *skb, struct page *page,
}
/* Called from bottom half context */
static struct sk_buff *page_to_skb(struct virtnet_info *vi,
static struct sk_buff *page_to_skb(struct receive_queue *rq,
struct page *page, unsigned int len)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
struct sk_buff *skb;
struct skb_vnet_hdr *hdr;
unsigned int copy, hdr_len, offset;
......@@ -224,12 +242,12 @@ static struct sk_buff *page_to_skb(struct virtnet_info *vi,
}
if (page)
give_pages(vi, page);
give_pages(rq, page);
return skb;
}
static int receive_mergeable(struct virtnet_info *vi, struct sk_buff *skb)
static int receive_mergeable(struct receive_queue *rq, struct sk_buff *skb)
{
struct skb_vnet_hdr *hdr = skb_vnet_hdr(skb);
struct page *page;
......@@ -243,7 +261,7 @@ static int receive_mergeable(struct virtnet_info *vi, struct sk_buff *skb)
skb->dev->stats.rx_length_errors++;
return -EINVAL;
}
page = virtqueue_get_buf(vi->rvq, &len);
page = virtqueue_get_buf(rq->vq, &len);
if (!page) {
pr_debug("%s: rx error: %d buffers missing\n",
skb->dev->name, hdr->mhdr.num_buffers);
......@@ -256,14 +274,15 @@ static int receive_mergeable(struct virtnet_info *vi, struct sk_buff *skb)
set_skb_frag(skb, page, 0, &len);
--vi->num;
--rq->num;
}
return 0;
}
static void receive_buf(struct net_device *dev, void *buf, unsigned int len)
static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
{
struct virtnet_info *vi = netdev_priv(dev);
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;
struct page *page;
......@@ -273,7 +292,7 @@ static void receive_buf(struct net_device *dev, void *buf, unsigned int len)
pr_debug("%s: short packet %i\n", dev->name, len);
dev->stats.rx_length_errors++;
if (vi->mergeable_rx_bufs || vi->big_packets)
give_pages(vi, buf);
give_pages(rq, buf);
else
dev_kfree_skb(buf);
return;
......@@ -285,14 +304,14 @@ static void receive_buf(struct net_device *dev, void *buf, unsigned int len)
skb_trim(skb, len);
} else {
page = buf;
skb = page_to_skb(vi, page, len);
skb = page_to_skb(rq, page, len);
if (unlikely(!skb)) {
dev->stats.rx_dropped++;
give_pages(vi, page);
give_pages(rq, page);
return;
}
if (vi->mergeable_rx_bufs)
if (receive_mergeable(vi, skb)) {
if (receive_mergeable(rq, skb)) {
dev_kfree_skb(skb);
return;
}
......@@ -359,8 +378,9 @@ static void receive_buf(struct net_device *dev, void *buf, unsigned int len)
dev_kfree_skb(skb);
}
static int add_recvbuf_small(struct virtnet_info *vi, gfp_t gfp)
static int add_recvbuf_small(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;
......@@ -372,77 +392,77 @@ static int add_recvbuf_small(struct virtnet_info *vi, gfp_t gfp)
skb_put(skb, MAX_PACKET_LEN);
hdr = skb_vnet_hdr(skb);
sg_set_buf(vi->rx_sg, &hdr->hdr, sizeof hdr->hdr);
sg_set_buf(rq->sg, &hdr->hdr, sizeof hdr->hdr);
skb_to_sgvec(skb, vi->rx_sg + 1, 0, skb->len);
skb_to_sgvec(skb, rq->sg + 1, 0, skb->len);
err = virtqueue_add_buf(vi->rvq, vi->rx_sg, 0, 2, skb, gfp);
err = virtqueue_add_buf(rq->vq, rq->sg, 0, 2, skb, gfp);
if (err < 0)
dev_kfree_skb(skb);
return err;
}
static int add_recvbuf_big(struct virtnet_info *vi, gfp_t gfp)
static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp)
{
struct page *first, *list = NULL;
char *p;
int i, err, offset;
/* page in vi->rx_sg[MAX_SKB_FRAGS + 1] is list tail */
/* page in rq->sg[MAX_SKB_FRAGS + 1] is list tail */
for (i = MAX_SKB_FRAGS + 1; i > 1; --i) {
first = get_a_page(vi, gfp);
first = get_a_page(rq, gfp);
if (!first) {
if (list)
give_pages(vi, list);
give_pages(rq, list);
return -ENOMEM;
}
sg_set_buf(&vi->rx_sg[i], page_address(first), PAGE_SIZE);
sg_set_buf(&rq->sg[i], page_address(first), PAGE_SIZE);
/* chain new page in list head to match sg */
first->private = (unsigned long)list;
list = first;
}
first = get_a_page(vi, gfp);
first = get_a_page(rq, gfp);
if (!first) {
give_pages(vi, list);
give_pages(rq, list);
return -ENOMEM;
}
p = page_address(first);
/* vi->rx_sg[0], vi->rx_sg[1] share the same page */
/* a separated vi->rx_sg[0] for virtio_net_hdr only due to QEMU bug */
sg_set_buf(&vi->rx_sg[0], p, sizeof(struct virtio_net_hdr));
/* rq->sg[0], rq->sg[1] share the same page */
/* a separated rq->sg[0] for virtio_net_hdr only due to QEMU bug */
sg_set_buf(&rq->sg[0], p, sizeof(struct virtio_net_hdr));
/* vi->rx_sg[1] for data packet, from offset */
/* rq->sg[1] for data packet, from offset */
offset = sizeof(struct padded_vnet_hdr);
sg_set_buf(&vi->rx_sg[1], p + offset, PAGE_SIZE - offset);
sg_set_buf(&rq->sg[1], p + offset, PAGE_SIZE - offset);
/* chain first in list head */
first->private = (unsigned long)list;
err = virtqueue_add_buf(vi->rvq, vi->rx_sg, 0, MAX_SKB_FRAGS + 2,
err = virtqueue_add_buf(rq->vq, rq->sg, 0, MAX_SKB_FRAGS + 2,
first, gfp);
if (err < 0)
give_pages(vi, first);
give_pages(rq, first);
return err;
}
static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp)
static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp)
{
struct page *page;
int err;
page = get_a_page(vi, gfp);
page = get_a_page(rq, gfp);
if (!page)
return -ENOMEM;
sg_init_one(vi->rx_sg, page_address(page), PAGE_SIZE);
sg_init_one(rq->sg, page_address(page), PAGE_SIZE);
err = virtqueue_add_buf(vi->rvq, vi->rx_sg, 0, 1, page, gfp);
err = virtqueue_add_buf(rq->vq, rq->sg, 0, 1, page, gfp);
if (err < 0)
give_pages(vi, page);
give_pages(rq, page);
return err;
}
......@@ -454,65 +474,68 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, 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 virtnet_info *vi, gfp_t gfp)
static bool try_fill_recv(struct receive_queue *rq, gfp_t gfp)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
int err;
bool oom;
do {
if (vi->mergeable_rx_bufs)
err = add_recvbuf_mergeable(vi, gfp);
err = add_recvbuf_mergeable(rq, gfp);
else if (vi->big_packets)
err = add_recvbuf_big(vi, gfp);
err = add_recvbuf_big(rq, gfp);
else
err = add_recvbuf_small(vi, gfp);
err = add_recvbuf_small(rq, gfp);
oom = err == -ENOMEM;
if (err < 0)
break;
++vi->num;
++rq->num;
} while (err > 0);
if (unlikely(vi->num > vi->max))
vi->max = vi->num;
virtqueue_kick(vi->rvq);
if (unlikely(rq->num > rq->max))
rq->max = rq->num;
virtqueue_kick(rq->vq);
return !oom;
}
static void skb_recv_done(struct virtqueue *rvq)
{
struct virtnet_info *vi = rvq->vdev->priv;
struct receive_queue *rq = &vi->rq;
/* Schedule NAPI, Suppress further interrupts if successful. */
if (napi_schedule_prep(&vi->napi)) {
if (napi_schedule_prep(&rq->napi)) {
virtqueue_disable_cb(rvq);
__napi_schedule(&vi->napi);
__napi_schedule(&rq->napi);
}
}
static void virtnet_napi_enable(struct virtnet_info *vi)
static void virtnet_napi_enable(struct receive_queue *rq)
{
napi_enable(&vi->napi);
napi_enable(&rq->napi);
/* If all buffers were filled by other side before we napi_enabled, we
* won't get another interrupt, so process any outstanding packets
* now. virtnet_poll wants re-enable the queue, so we disable here.
* We synchronize against interrupts via NAPI_STATE_SCHED */
if (napi_schedule_prep(&vi->napi)) {
virtqueue_disable_cb(vi->rvq);
if (napi_schedule_prep(&rq->napi)) {
virtqueue_disable_cb(rq->vq);
local_bh_disable();
__napi_schedule(&vi->napi);
__napi_schedule(&rq->napi);
local_bh_enable();
}
}
static void refill_work(struct work_struct *work)
{
struct virtnet_info *vi;
struct virtnet_info *vi =
container_of(work, struct virtnet_info, refill.work);
bool still_empty;
vi = container_of(work, struct virtnet_info, refill.work);
napi_disable(&vi->napi);
still_empty = !try_fill_recv(vi, GFP_KERNEL);
virtnet_napi_enable(vi);
napi_disable(&vi->rq.napi);
still_empty = !try_fill_recv(&vi->rq, GFP_KERNEL);
virtnet_napi_enable(&vi->rq);
/* In theory, this can happen: if we don't get any buffers in
* we will *never* try to fill again. */
......@@ -522,29 +545,31 @@ static void refill_work(struct work_struct *work)
static int virtnet_poll(struct napi_struct *napi, int budget)
{
struct virtnet_info *vi = container_of(napi, struct virtnet_info, napi);
struct receive_queue *rq =
container_of(napi, struct receive_queue, napi);
struct virtnet_info *vi = rq->vq->vdev->priv;
void *buf;
unsigned int len, received = 0;
again:
while (received < budget &&
(buf = virtqueue_get_buf(vi->rvq, &len)) != NULL) {
receive_buf(vi->dev, buf, len);
--vi->num;
(buf = virtqueue_get_buf(rq->vq, &len)) != NULL) {
receive_buf(rq, buf, len);
--rq->num;
received++;
}
if (vi->num < vi->max / 2) {
if (!try_fill_recv(vi, GFP_ATOMIC))
if (rq->num < rq->max / 2) {
if (!try_fill_recv(rq, GFP_ATOMIC))
schedule_delayed_work(&vi->refill, 0);
}
/* Out of packets? */
if (received < budget) {
napi_complete(napi);
if (unlikely(!virtqueue_enable_cb(vi->rvq)) &&
if (unlikely(!virtqueue_enable_cb(rq->vq)) &&
napi_schedule_prep(napi)) {
virtqueue_disable_cb(vi->rvq);
virtqueue_disable_cb(rq->vq);
__napi_schedule(napi);
goto again;
}
......@@ -553,13 +578,14 @@ static int virtnet_poll(struct napi_struct *napi, int budget)
return received;
}
static unsigned int free_old_xmit_skbs(struct virtnet_info *vi)
static unsigned int free_old_xmit_skbs(struct send_queue *sq)
{
struct sk_buff *skb;
unsigned int len, tot_sgs = 0;
struct virtnet_info *vi = sq->vq->vdev->priv;
struct virtnet_stats *stats = this_cpu_ptr(vi->stats);
while ((skb = virtqueue_get_buf(vi->svq, &len)) != NULL) {
while ((skb = virtqueue_get_buf(sq->vq, &len)) != NULL) {
pr_debug("Sent skb %p\n", skb);
u64_stats_update_begin(&stats->tx_syncp);
......@@ -573,10 +599,11 @@ static unsigned int free_old_xmit_skbs(struct virtnet_info *vi)
return tot_sgs;
}
static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
static int xmit_skb(struct send_queue *sq, struct sk_buff *skb)
{
struct skb_vnet_hdr *hdr = skb_vnet_hdr(skb);
const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest;
struct virtnet_info *vi = sq->vq->vdev->priv;
pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest);
......@@ -611,25 +638,26 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
/* Encode metadata header at front. */
if (vi->mergeable_rx_bufs)
sg_set_buf(vi->tx_sg, &hdr->mhdr, sizeof hdr->mhdr);
sg_set_buf(sq->sg, &hdr->mhdr, sizeof hdr->mhdr);
else
sg_set_buf(vi->tx_sg, &hdr->hdr, sizeof hdr->hdr);
sg_set_buf(sq->sg, &hdr->hdr, sizeof hdr->hdr);
hdr->num_sg = skb_to_sgvec(skb, vi->tx_sg + 1, 0, skb->len) + 1;
return virtqueue_add_buf(vi->svq, vi->tx_sg, hdr->num_sg,
hdr->num_sg = skb_to_sgvec(skb, sq->sg + 1, 0, skb->len) + 1;
return virtqueue_add_buf(sq->vq, sq->sg, hdr->num_sg,
0, skb, GFP_ATOMIC);
}
static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct virtnet_info *vi = netdev_priv(dev);
struct send_queue *sq = &vi->sq;
int capacity;
/* Free up any pending old buffers before queueing new ones. */
free_old_xmit_skbs(vi);
free_old_xmit_skbs(sq);
/* Try to transmit */
capacity = xmit_skb(vi, skb);
capacity = xmit_skb(sq, skb);
/* This can happen with OOM and indirect buffers. */
if (unlikely(capacity < 0)) {
......@@ -648,7 +676,7 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
kfree_skb(skb);
return NETDEV_TX_OK;
}
virtqueue_kick(vi->svq);
virtqueue_kick(sq->vq);
/* Don't wait up for transmitted skbs to be freed. */
skb_orphan(skb);
......@@ -658,12 +686,12 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
* before it gets out of hand. Naturally, this wastes entries. */
if (capacity < 2+MAX_SKB_FRAGS) {
netif_stop_queue(dev);
if (unlikely(!virtqueue_enable_cb_delayed(vi->svq))) {
if (unlikely(!virtqueue_enable_cb_delayed(sq->vq))) {
/* More just got used, free them then recheck. */
capacity += free_old_xmit_skbs(vi);
capacity += free_old_xmit_skbs(sq);
if (capacity >= 2+MAX_SKB_FRAGS) {
netif_start_queue(dev);
virtqueue_disable_cb(vi->svq);
virtqueue_disable_cb(sq->vq);
}
}
}
......@@ -731,7 +759,7 @@ static void virtnet_netpoll(struct net_device *dev)
{
struct virtnet_info *vi = netdev_priv(dev);
napi_schedule(&vi->napi);
napi_schedule(&vi->rq.napi);
}
#endif
......@@ -740,10 +768,10 @@ static int virtnet_open(struct net_device *dev)
struct virtnet_info *vi = netdev_priv(dev);
/* Make sure we have some buffers: if oom use wq. */
if (!try_fill_recv(vi, GFP_KERNEL))
if (!try_fill_recv(&vi->rq, GFP_KERNEL))
schedule_delayed_work(&vi->refill, 0);
virtnet_napi_enable(vi);
virtnet_napi_enable(&vi->rq);
return 0;
}
......@@ -808,7 +836,7 @@ static int virtnet_close(struct net_device *dev)
/* Make sure refill_work doesn't re-enable napi! */
cancel_delayed_work_sync(&vi->refill);
napi_disable(&vi->napi);
napi_disable(&vi->rq.napi);
return 0;
}
......@@ -920,11 +948,10 @@ static void virtnet_get_ringparam(struct net_device *dev,
{
struct virtnet_info *vi = netdev_priv(dev);
ring->rx_max_pending = virtqueue_get_vring_size(vi->rvq);
ring->tx_max_pending = virtqueue_get_vring_size(vi->svq);
ring->rx_max_pending = virtqueue_get_vring_size(vi->rq.vq);
ring->tx_max_pending = virtqueue_get_vring_size(vi->sq.vq);
ring->rx_pending = ring->rx_max_pending;
ring->tx_pending = ring->tx_max_pending;
}
......@@ -1019,6 +1046,13 @@ static void virtnet_config_changed(struct virtio_device *vdev)
schedule_work(&vi->config_work);
}
static void virtnet_del_vqs(struct virtnet_info *vi)
{
struct virtio_device *vdev = vi->vdev;
vdev->config->del_vqs(vdev);
}
static int init_vqs(struct virtnet_info *vi)
{
struct virtqueue *vqs[3];
......@@ -1034,8 +1068,8 @@ static int init_vqs(struct virtnet_info *vi)
if (err)
return err;
vi->rvq = vqs[0];
vi->svq = vqs[1];
vi->rq.vq = vqs[0];
vi->sq.vq = vqs[1];
if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ)) {
vi->cvq = vqs[2];
......@@ -1099,11 +1133,11 @@ static int virtnet_probe(struct virtio_device *vdev)
/* Set up our device-specific information */
vi = netdev_priv(dev);
netif_napi_add(dev, &vi->napi, virtnet_poll, napi_weight);
netif_napi_add(dev, &vi->rq.napi, virtnet_poll, napi_weight);
vi->dev = dev;
vi->vdev = vdev;
vdev->priv = vi;
vi->pages = NULL;
vi->rq.pages = NULL;
vi->stats = alloc_percpu(struct virtnet_stats);
err = -ENOMEM;
if (vi->stats == NULL)
......@@ -1113,8 +1147,8 @@ static int virtnet_probe(struct virtio_device *vdev)
mutex_init(&vi->config_lock);
vi->config_enable = true;
INIT_WORK(&vi->config_work, virtnet_config_changed_work);
sg_init_table(vi->rx_sg, ARRAY_SIZE(vi->rx_sg));
sg_init_table(vi->tx_sg, ARRAY_SIZE(vi->tx_sg));
sg_init_table(vi->rq.sg, ARRAY_SIZE(vi->rq.sg));
sg_init_table(vi->sq.sg, ARRAY_SIZE(vi->sq.sg));
/* If we can receive ANY GSO packets, we must allocate large ones. */
if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) ||
......@@ -1136,10 +1170,10 @@ static int virtnet_probe(struct virtio_device *vdev)
}
/* Last of all, set up some receive buffers. */
try_fill_recv(vi, GFP_KERNEL);
try_fill_recv(&vi->rq, GFP_KERNEL);
/* If we didn't even get one input buffer, we're useless. */
if (vi->num == 0) {
if (vi->rq.num == 0) {
err = -ENOMEM;
goto unregister;
}
......@@ -1160,7 +1194,7 @@ static int virtnet_probe(struct virtio_device *vdev)
unregister:
unregister_netdev(dev);
free_vqs:
vdev->config->del_vqs(vdev);
virtnet_del_vqs(vi);
free_stats:
free_percpu(vi->stats);
free:
......@@ -1172,22 +1206,22 @@ static void free_unused_bufs(struct virtnet_info *vi)
{
void *buf;
while (1) {
buf = virtqueue_detach_unused_buf(vi->svq);
buf = virtqueue_detach_unused_buf(vi->sq.vq);
if (!buf)
break;
dev_kfree_skb(buf);
}
while (1) {
buf = virtqueue_detach_unused_buf(vi->rvq);
buf = virtqueue_detach_unused_buf(vi->rq.vq);
if (!buf)
break;
if (vi->mergeable_rx_bufs || vi->big_packets)
give_pages(vi, buf);
give_pages(&vi->rq, buf);
else
dev_kfree_skb(buf);
--vi->num;
--vi->rq.num;
}
BUG_ON(vi->num != 0);
BUG_ON(vi->rq.num != 0);
}
static void remove_vq_common(struct virtnet_info *vi)
......@@ -1197,10 +1231,10 @@ static void remove_vq_common(struct virtnet_info *vi)
/* Free unused buffers in both send and recv, if any. */
free_unused_bufs(vi);
vi->vdev->config->del_vqs(vi->vdev);
virtnet_del_vqs(vi);
while (vi->pages)
__free_pages(get_a_page(vi, GFP_KERNEL), 0);
while (vi->rq.pages)
__free_pages(get_a_page(&vi->rq, GFP_KERNEL), 0);
}
static void virtnet_remove(struct virtio_device *vdev)
......@@ -1236,7 +1270,7 @@ static int virtnet_freeze(struct virtio_device *vdev)
cancel_delayed_work_sync(&vi->refill);
if (netif_running(vi->dev))
napi_disable(&vi->napi);
napi_disable(&vi->rq.napi);
remove_vq_common(vi);
......@@ -1255,11 +1289,11 @@ static int virtnet_restore(struct virtio_device *vdev)
return err;
if (netif_running(vi->dev))
virtnet_napi_enable(vi);
virtnet_napi_enable(&vi->rq);
netif_device_attach(vi->dev);
if (!try_fill_recv(vi, GFP_KERNEL))
if (!try_fill_recv(&vi->rq, GFP_KERNEL))
schedule_delayed_work(&vi->refill, 0);
mutex_lock(&vi->config_lock);
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7