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

[Guangbin Huang <huangguangbin2@huawei.com>]

From: Jie Wang <wangjie125@huawei.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@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
---
 ethtool.8.in                 | 4 ++++
 ethtool.c                    | 1 +
 netlink/rings.c              | 7 +++++++
 uapi/linux/ethtool_netlink.h | 1 +
 4 files changed, 13 insertions(+)

diff --git a/ethtool.8.in b/ethtool.8.in
index 12940e1b32aa..a87f31f90077 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 4f5c234304be..4d2a475051a7 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 119178ea336b..a53eed5dbc60 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,
+	},
 	{}
 };
 
diff --git a/uapi/linux/ethtool_netlink.h b/uapi/linux/ethtool_netlink.h
index d8b19cf98003..79fe0bf686f3 100644
--- a/uapi/linux/ethtool_netlink.h
+++ b/uapi/linux/ethtool_netlink.h
@@ -330,6 +330,7 @@ enum {
 	ETHTOOL_A_RINGS_RX_JUMBO,			/* u32 */
 	ETHTOOL_A_RINGS_TX,				/* u32 */
 	ETHTOOL_A_RINGS_RX_BUF_LEN,                     /* u32 */
+	ETHTOOL_A_RINGS_TX_PUSH = 13,			/* u8  */
 
 	/* add new constants above here */
 	__ETHTOOL_A_RINGS_CNT,
-- 
2.33.0