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Date: Wed, 25 Oct 2023 11:03:32 +0800
From: Jason Wang <jasowang@...hat.com>
To: Heng Qi <hengqi@...ux.alibaba.com>
Cc: "Michael S. Tsirkin" <mst@...hat.com>, netdev@...r.kernel.org,
virtualization@...ts.linux-foundation.org,
Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Eric Dumazet <edumazet@...gle.com>,
"David S. Miller" <davem@...emloft.net>, Paolo Abeni <pabeni@...hat.com>,
Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>,
Alexei Starovoitov <ast@...nel.org>, Jakub Kicinski <kuba@...nel.org>, Simon Horman <horms@...nel.org>,
"Liu, Yujie" <yujie.liu@...el.com>
Subject: Re: [PATCH net-next 3/5] virtio-net: extract virtqueue coalescig cmd
for reuse
On Thu, Oct 12, 2023 at 3:44 PM Heng Qi <hengqi@...ux.alibaba.com> wrote:
>
> Extract commands to set virtqueue coalescing parameters for reuse
> by ethtool -Q, vq resize and netdim.
>
> Signed-off-by: Heng Qi <hengqi@...ux.alibaba.com>
Acked-by: Jason Wang <jasowang@...hat.com>
Thanks
> ---
> drivers/net/virtio_net.c | 106 +++++++++++++++++++++++----------------
> 1 file changed, 64 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 54b3fb8d0384..caef78bb3963 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -2846,6 +2846,58 @@ static void virtnet_cpu_notif_remove(struct virtnet_info *vi)
> &vi->node_dead);
> }
>
> +static int virtnet_send_ctrl_coal_vq_cmd(struct virtnet_info *vi,
> + u16 vqn, u32 max_usecs, u32 max_packets)
> +{
> + struct scatterlist sgs;
> +
> + vi->ctrl->coal_vq.vqn = cpu_to_le16(vqn);
> + vi->ctrl->coal_vq.coal.max_usecs = cpu_to_le32(max_usecs);
> + vi->ctrl->coal_vq.coal.max_packets = cpu_to_le32(max_packets);
> + sg_init_one(&sgs, &vi->ctrl->coal_vq, sizeof(vi->ctrl->coal_vq));
> +
> + if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL,
> + VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET,
> + &sgs))
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static int virtnet_send_rx_ctrl_coal_vq_cmd(struct virtnet_info *vi,
> + u16 queue, u32 max_usecs,
> + u32 max_packets)
> +{
> + int err;
> +
> + err = virtnet_send_ctrl_coal_vq_cmd(vi, rxq2vq(queue),
> + max_usecs, max_packets);
> + if (err)
> + return err;
> +
> + vi->rq[queue].intr_coal.max_usecs = max_usecs;
> + vi->rq[queue].intr_coal.max_packets = max_packets;
> +
> + return 0;
> +}
> +
> +static int virtnet_send_tx_ctrl_coal_vq_cmd(struct virtnet_info *vi,
> + u16 queue, u32 max_usecs,
> + u32 max_packets)
> +{
> + int err;
> +
> + err = virtnet_send_ctrl_coal_vq_cmd(vi, txq2vq(queue),
> + max_usecs, max_packets);
> + if (err)
> + return err;
> +
> + vi->sq[queue].intr_coal.max_usecs = max_usecs;
> + vi->sq[queue].intr_coal.max_packets = max_packets;
> +
> + return 0;
> +}
> +
> static void virtnet_get_ringparam(struct net_device *dev,
> struct ethtool_ringparam *ring,
> struct kernel_ethtool_ringparam *kernel_ring,
> @@ -2903,14 +2955,11 @@ static int virtnet_set_ringparam(struct net_device *dev,
> * 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);
> + err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, 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) {
> @@ -2919,14 +2968,11 @@ static int virtnet_set_ringparam(struct net_device *dev,
> 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);
> + err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, 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;
> }
> }
>
> @@ -3327,48 +3373,24 @@ static int virtnet_send_notf_coal_cmds(struct virtnet_info *vi,
> return 0;
> }
>
> -static int virtnet_send_ctrl_coal_vq_cmd(struct virtnet_info *vi,
> - u16 vqn, u32 max_usecs, u32 max_packets)
> -{
> - struct scatterlist sgs;
> -
> - vi->ctrl->coal_vq.vqn = cpu_to_le16(vqn);
> - vi->ctrl->coal_vq.coal.max_usecs = cpu_to_le32(max_usecs);
> - vi->ctrl->coal_vq.coal.max_packets = cpu_to_le32(max_packets);
> - sg_init_one(&sgs, &vi->ctrl->coal_vq, sizeof(vi->ctrl->coal_vq));
> -
> - if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL,
> - VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET,
> - &sgs))
> - return -EINVAL;
> -
> - return 0;
> -}
> -
> static int virtnet_send_notf_coal_vq_cmds(struct virtnet_info *vi,
> struct ethtool_coalesce *ec,
> u16 queue)
> {
> int err;
>
> - err = virtnet_send_ctrl_coal_vq_cmd(vi, rxq2vq(queue),
> - ec->rx_coalesce_usecs,
> - ec->rx_max_coalesced_frames);
> + err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, queue,
> + ec->rx_coalesce_usecs,
> + ec->rx_max_coalesced_frames);
> if (err)
> return err;
>
> - vi->rq[queue].intr_coal.max_usecs = ec->rx_coalesce_usecs;
> - vi->rq[queue].intr_coal.max_packets = ec->rx_max_coalesced_frames;
> -
> - err = virtnet_send_ctrl_coal_vq_cmd(vi, txq2vq(queue),
> - ec->tx_coalesce_usecs,
> - ec->tx_max_coalesced_frames);
> + err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, queue,
> + ec->tx_coalesce_usecs,
> + ec->tx_max_coalesced_frames);
> if (err)
> return err;
>
> - vi->sq[queue].intr_coal.max_usecs = ec->tx_coalesce_usecs;
> - vi->sq[queue].intr_coal.max_packets = ec->tx_max_coalesced_frames;
> -
> return 0;
> }
>
> --
> 2.19.1.6.gb485710b
>
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