diff options
| author | Heng Qi <hengqi@linux.alibaba.com> | 2023-10-08 09:27:43 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-11 09:13:50 +0300 |
| commit | f61fe5f081cf40de08d0a4c89659baf23c900f0c (patch) | |
| tree | c79b48e2e34d3f6eeeca96d38d861be9d8dae854 /drivers/net/virtio_net.c | |
| parent | bfb2b3609162135625bf96acf5118051cd0d082e (diff) | |
| download | linux-f61fe5f081cf40de08d0a4c89659baf23c900f0c.tar.xz | |
virtio-net: fix the vq coalescing setting for vq resize
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: 394bd87764b6 ("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>
Diffstat (limited to 'drivers/net/virtio_net.c')
| -rw-r--r-- | drivers/net/virtio_net.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index e3ad2f28e868..26e4a7749628 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -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; } } |