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

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Date:   Thu, 21 Apr 2022 16:46:46 +0800
From:   Guangbin Huang <huangguangbin2@...wei.com>
To:     <mkubecek@...e.cz>, <davem@...emloft.net>, <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <lipeng321@...wei.com>,
        <huangguangbin2@...wei.com>
Subject: [PATCH ethtool-next v2 2/2] ethtool: add support to get/set tx push by ethtool -G/g

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,
+	},
 	{}
 };
 
-- 
2.33.0