netdev - Re: [PATCH ethtool-next v2 2/2] ethtool: add support to get/set tx push by ethtool -G/g

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Date:   Wed, 27 Apr 2022 19:16:31 +0530
From:   sundeep subbaraya <sundeep.lkml@...il.com>
To:     Guangbin Huang <huangguangbin2@...wei.com>
Cc:     mkubecek@...e.cz, David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        lipeng321@...wei.com, Subbaraya Sundeep <sbhatta@...vell.com>
Subject: Re: [PATCH ethtool-next v2 2/2] ethtool: add support to get/set tx
 push by ethtool -G/g

Hi Guangbin,

On Thu, Apr 21, 2022 at 3:47 PM Guangbin Huang
<huangguangbin2@...wei.com> wrote:
>
> From: Jie Wang <wangjie125@...wei.com>
>
> Currently tx push is a standard feature for NICs such as Mellanox, HNS3.
> But there is no command to set or get this feature.
>
> So this patch adds support for "ethtool -G <dev> tx-push on|off" and
> "ethtool -g <dev>" to set/get tx push mode.
>
> Signed-off-by: Jie Wang <wangjie125@...wei.com>
> ---
>  ethtool.8.in    | 4 ++++
>  ethtool.c       | 1 +
>  netlink/rings.c | 7 +++++++
>  3 files changed, 12 insertions(+)
>
> diff --git a/ethtool.8.in b/ethtool.8.in
> index 12940e1..a87f31f 100644
> --- a/ethtool.8.in
> +++ b/ethtool.8.in
> @@ -199,6 +199,7 @@ ethtool \- query or control network driver and hardware settings
>  .BN rx\-jumbo
>  .BN tx
>  .BN rx\-buf\-len
> +.BN tx\-push
>  .HP
>  .B ethtool \-i|\-\-driver
>  .I devname
> @@ -573,6 +574,9 @@ Changes the number of ring entries for the Tx ring.
>  .TP
>  .BI rx\-buf\-len \ N
>  Changes the size of a buffer in the Rx ring.
> +.TP
> +.BI tx\-push \ on|off
> +Specifies whether TX push should be enabled.
>  .RE
>  .TP
>  .B \-i \-\-driver
> diff --git a/ethtool.c b/ethtool.c
> index 4f5c234..4d2a475 100644
> --- a/ethtool.c
> +++ b/ethtool.c
> @@ -5733,6 +5733,7 @@ static const struct option args[] = {
>                           "             [ rx-jumbo N ]\n"
>                           "             [ tx N ]\n"
>                           "             [ rx-buf-len N]\n"
> +                         "             [ tx-push on|off]\n"
>         },
>         {
>                 .opts   = "-k|--show-features|--show-offload",
> diff --git a/netlink/rings.c b/netlink/rings.c
> index 119178e..a53eed5 100644
> --- a/netlink/rings.c
> +++ b/netlink/rings.c
> @@ -47,6 +47,7 @@ int rings_reply_cb(const struct nlmsghdr *nlhdr, void *data)
>         show_u32(tb[ETHTOOL_A_RINGS_RX_JUMBO], "RX Jumbo:\t");
>         show_u32(tb[ETHTOOL_A_RINGS_TX], "TX:\t\t");
>         show_u32(tb[ETHTOOL_A_RINGS_RX_BUF_LEN], "RX Buf Len:\t\t");
> +       show_bool("tx-push", "TX Push:\t%s\n", tb[ETHTOOL_A_RINGS_TX_PUSH]);
>
>         return MNL_CB_OK;
>  }
> @@ -105,6 +106,12 @@ static const struct param_parser sring_params[] = {
>                 .handler        = nl_parse_direct_u32,
>                 .min_argc       = 1,
>         },
> +       {
> +               .arg            = "tx-push",
> +               .type           = ETHTOOL_A_RINGS_TX_PUSH,
> +               .handler        = nl_parse_u8bool,
> +               .min_argc       = 0,

Why min_argc is 0 ? Thanks for syncing kernel headers. I have patch for adding
cqe-size command and will send after these are merged.

Sundeep
> +       },
>         {}
>  };
>
> --
> 2.33.0
>