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virtio-net: fix the vq coalescing setting for vq resize

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According to the definition of virtqueue coalescing spec[1]:

  Upon disabling and re-enabling a transmit virtqueue, the device MUST set
  the coalescing parameters of the virtqueue to those configured through the
  VIRTIO_NET_CTRL_NOTF_COAL_TX_SET command, or, if the driver did not set
  any TX coalescing parameters, to 0.

  Upon disabling and re-enabling a receive virtqueue, the device MUST set
  the coalescing parameters of the virtqueue to those configured through the
  VIRTIO_NET_CTRL_NOTF_COAL_RX_SET command, or, if the driver did not set
  any RX coalescing parameters, to 0.

We need to add this setting for vq resize (ethtool -G) where vq_reset happens.

[1] https://lists.oasis-open.org/archives/virtio-dev/202303/msg00415.html

Fixes: 394bd87764 ("virtio_net: support per queue interrupt coalesce command")
Cc: Gavin Li <gavinl@nvidia.com>
Signed-off-by: Heng Qi <hengqi@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heng Qi 2023-10-08 14:27:43 +08:00 committed by David S. Miller
parent bfb2b36091
commit f61fe5f081
1 changed files with 27 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

27
drivers/net/virtio_net.c
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@ -2855,6 +2855,9 @@ static void virtnet_get_ringparam(struct net_device *dev,
ring->tx_pending = virtqueue_get_vring_size(vi->sq[0].vq);
}
static int virtnet_send_ctrl_coal_vq_cmd(struct virtnet_info *vi,
u16 vqn, u32 max_usecs, u32 max_packets);
static int virtnet_set_ringparam(struct net_device *dev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
@ -2890,12 +2893,36 @@ static int virtnet_set_ringparam(struct net_device *dev,
err = virtnet_tx_resize(vi, sq, ring->tx_pending);
if (err)
return err;
/* Upon disabling and re-enabling a transmit virtqueue, the device must
* set the coalescing parameters of the virtqueue to those configured
* through the VIRTIO_NET_CTRL_NOTF_COAL_TX_SET command, or, if the driver
* did not set any TX coalescing parameters, to 0.
*/
err = virtnet_send_ctrl_coal_vq_cmd(vi, txq2vq(i),
vi->intr_coal_tx.max_usecs,
vi->intr_coal_tx.max_packets);
if (err)
return err;
vi->sq[i].intr_coal.max_usecs = vi->intr_coal_tx.max_usecs;
vi->sq[i].intr_coal.max_packets = vi->intr_coal_tx.max_packets;
}
if (ring->rx_pending != rx_pending) {
err = virtnet_rx_resize(vi, rq, ring->rx_pending);
if (err)
return err;
/* The reason is same as the transmit virtqueue reset */
err = virtnet_send_ctrl_coal_vq_cmd(vi, rxq2vq(i),
vi->intr_coal_rx.max_usecs,
vi->intr_coal_rx.max_packets);
if (err)
return err;
vi->rq[i].intr_coal.max_usecs = vi->intr_coal_rx.max_usecs;
vi->rq[i].intr_coal.max_packets = vi->intr_coal_rx.max_packets;
}
}