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authorXuan Zhuo <xuanzhuo@linux.alibaba.com>2022-08-01 14:39:02 +0800
committerMichael S. Tsirkin <mst@redhat.com>2022-08-11 04:26:07 -0400
commita335b33f4f354c5b77a79d505708f6d2f486ceab (patch)
treef408bbe52d3ca539d5ab376a73fa99f5bf4878ed
parentebcce492636506443e4361db6587e6acd1a624f9 (diff)
virtio_net: support set_ringparam
Support set_ringparam based on virtio queue reset. Users can use ethtool -G eth0 <ring_num> to modify the ring size of virtio-net. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-43-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-rw-r--r--drivers/net/virtio_net.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 6aa0871b438c..16783ed782c5 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2363,6 +2363,53 @@ static void virtnet_get_ringparam(struct net_device *dev,
ring->tx_pending = virtqueue_get_vring_size(vi->sq[0].vq);
}
+static int virtnet_set_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *ring,
+ struct kernel_ethtool_ringparam *kernel_ring,
+ struct netlink_ext_ack *extack)
+{
+ struct virtnet_info *vi = netdev_priv(dev);
+ u32 rx_pending, tx_pending;
+ struct receive_queue *rq;
+ struct send_queue *sq;
+ int i, err;
+
+ if (ring->rx_mini_pending || ring->rx_jumbo_pending)
+ return -EINVAL;
+
+ rx_pending = virtqueue_get_vring_size(vi->rq[0].vq);
+ tx_pending = virtqueue_get_vring_size(vi->sq[0].vq);
+
+ if (ring->rx_pending == rx_pending &&
+ ring->tx_pending == tx_pending)
+ return 0;
+
+ if (ring->rx_pending > vi->rq[0].vq->num_max)
+ return -EINVAL;
+
+ if (ring->tx_pending > vi->sq[0].vq->num_max)
+ return -EINVAL;
+
+ for (i = 0; i < vi->max_queue_pairs; i++) {
+ rq = vi->rq + i;
+ sq = vi->sq + i;
+
+ if (ring->tx_pending != tx_pending) {
+ err = virtnet_tx_resize(vi, sq, ring->tx_pending);
+ if (err)
+ return err;
+ }
+
+ if (ring->rx_pending != rx_pending) {
+ err = virtnet_rx_resize(vi, rq, ring->rx_pending);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
static bool virtnet_commit_rss_command(struct virtnet_info *vi)
{
struct net_device *dev = vi->dev;
@@ -2850,6 +2897,7 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
.get_drvinfo = virtnet_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_ringparam = virtnet_get_ringparam,
+ .set_ringparam = virtnet_set_ringparam,
.get_strings = virtnet_get_strings,
.get_sset_count = virtnet_get_sset_count,
.get_ethtool_stats = virtnet_get_ethtool_stats,