[PATCH v11 37/40] virtio_net: split free_unused_bufs()

Xuan Zhuo
2022-06-29T07:01:29Z

This patch separates two functions for freeing sq buf and rq buf from
free_unused_bufs().

When supporting the enable/disable tx/rq queue in the future, it is
necessary to support separate recovery of a sq buf or a rq buf.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
drivers/net/virtio_net.c | 41 ++++++++++++++++++++++++----------------
1 file changed, 25 insertions(+), 16 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 63f990bdc302..9fe222a3663a 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3151,6 +3151,27 @@ static void free_receive_page_frags(struct virtnet_info *vi)
put_page(vi->rq[i].alloc_frag.page);
}

+static void virtnet_sq_free_unused_buf(struct virtqueue *vq, void *buf)
+{
+ if (!is_xdp_frame(buf))
+ dev_kfree_skb(buf);
+ else
+ xdp_return_frame(ptr_to_xdp(buf));
+}
+
+static void virtnet_rq_free_unused_buf(struct virtqueue *vq, void *buf)
+{
+ struct virtnet_info *vi = vq->vdev->priv;
+ int i = vq2rxq(vq);
+
+ if (vi->mergeable_rx_bufs)
+ put_page(virt_to_head_page(buf));
+ else if (vi->big_packets)
+ give_pages(&vi->rq[i], buf);
+ else
+ put_page(virt_to_head_page(buf));
+}
+
static void free_unused_bufs(struct virtnet_info *vi)
{
void *buf;
@@ -3158,26 +3179,14 @@ static void free_unused_bufs(struct virtnet_info *vi)

for (i = 0; i < vi->max_queue_pairs; i++) {
struct virtqueue *vq = vi->sq[i].vq;
- while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) {
- if (!is_xdp_frame(buf))
- dev_kfree_skb(buf);
- else
- xdp_return_frame(ptr_to_xdp(buf));
- }
+ while ((buf = virtqueue_detach_unused_buf(vq)) != NULL)
+ virtnet_sq_free_unused_buf(vq, buf);
}

for (i = 0; i < vi->max_queue_pairs; i++) {
struct virtqueue *vq = vi->rq[i].vq;
-
- while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) {
- if (vi->mergeable_rx_bufs) {
- put_page(virt_to_head_page(buf));
- } else if (vi->big_packets) {
- give_pages(&vi->rq[i], buf);
- } else {
- put_page(virt_to_head_page(buf));
- }
- }
+ while ((buf = virtqueue_detach_unused_buf(vq)) != NULL)
+ virtnet_rq_free_unused_buf(vq, buf);
}
}

--
2.31.0