On Thu, Nov 2, 2023 at 9:10 PM Heng Qi <hen...@linux.alibaba.com> wrote:
>
> We do not currently support tx dim, so respond to -EOPNOTSUPP.
>
> Signed-off-by: Heng Qi <hen...@linux.alibaba.com>
> ---
> v1->v2:
> - Use -EOPNOTSUPP instead of specific implementation.
>
> drivers/net/virtio_net.c | 29 ++++++++++++++++++++++++++---
> 1 file changed, 26 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 5473aa1ee5cd..03edeadd0725 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -3364,9 +3364,15 @@ static int virtnet_get_link_ksettings(struct
> net_device *dev,
> static int virtnet_send_tx_notf_coal_cmds(struct virtnet_info *vi,
> struct ethtool_coalesce *ec)
> {
> + bool tx_ctrl_dim_on = !!ec->use_adaptive_tx_coalesce;
> struct scatterlist sgs_tx;
> int i;
>
> + if (tx_ctrl_dim_on) {
> + pr_debug("Failed to enable adaptive-tx, which is not
> supported\n");
> + return -EOPNOTSUPP;
> + }
When can we hit this?
Thanks
> +
> vi->ctrl->coal_tx.tx_usecs = cpu_to_le32(ec->tx_coalesce_usecs);
> vi->ctrl->coal_tx.tx_max_packets =
> cpu_to_le32(ec->tx_max_coalesced_frames);
> sg_init_one(&sgs_tx, &vi->ctrl->coal_tx, sizeof(vi->ctrl->coal_tx));
> @@ -3497,6 +3503,25 @@ static int virtnet_send_rx_notf_coal_vq_cmds(struct
> virtnet_info *vi,
> return 0;
> }
>
> +static int virtnet_send_tx_notf_coal_vq_cmds(struct virtnet_info *vi,
> + struct ethtool_coalesce *ec,
> + u16 queue)
> +{
> + bool tx_ctrl_dim_on = !!ec->use_adaptive_tx_coalesce;
> + int err;
> +
> + if (tx_ctrl_dim_on) {
> + pr_debug("Enabling adaptive-tx for txq%d is not supported\n",
> queue);
> + return -EOPNOTSUPP;
> + }
> +
> + err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, queue,
> + ec->tx_coalesce_usecs,
> + ec->tx_max_coalesced_frames);
> +
> + return err;
> +}
> +
> static int virtnet_send_notf_coal_vq_cmds(struct virtnet_info *vi,
> struct ethtool_coalesce *ec,
> u16 queue)
> @@ -3507,9 +3532,7 @@ static int virtnet_send_notf_coal_vq_cmds(struct
> virtnet_info *vi,
> if (err)
> return err;
>
> - err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, queue,
> - ec->tx_coalesce_usecs,
> - ec->tx_max_coalesced_frames);
> + err = virtnet_send_tx_notf_coal_vq_cmds(vi, ec, queue);
> if (err)
> return err;
>
> --
> 2.19.1.6.gb485710b
>
