diff options
| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2022-08-01 14:39:02 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-08-11 04:26:07 -0400 |
| commit | a335b33f4f354c5b77a79d505708f6d2f486ceab (patch) | |
| tree | f408bbe52d3ca539d5ab376a73fa99f5bf4878ed /drivers/net | |
| parent | ebcce492636506443e4361db6587e6acd1a624f9 (diff) | |
| download | linux-a335b33f4f354c5b77a79d505708f6d2f486ceab.tar.bz2 | |
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/virtio_net.c | 48 |
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, |