netdev - [PATCH V5 net-next 1/6] ethtool: add support to set/get tx copybreak buf size via ethtool

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Message-ID: <20211030131001.38739-2-huangguangbin2@huawei.com>
Date:   Sat, 30 Oct 2021 21:09:56 +0800
From:   Guangbin Huang <huangguangbin2@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <mkubecek@...e.cz>,
        <andrew@...n.ch>, <amitc@...lanox.com>, <idosch@...sch.org>,
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        <anthony.l.nguyen@...el.com>, <jdike@...toit.com>,
        <richard@....at>, <anton.ivanov@...bridgegreys.com>,
        <netanel@...zon.com>, <akiyano@...zon.com>, <gtzalik@...zon.com>,
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        <kgraul@...ux.ibm.com>, <hca@...ux.ibm.com>, <gor@...ux.ibm.com>,
        <johannes@...solutions.net>
CC:     <netdev@...r.kernel.org>, <lipeng321@...wei.com>,
        <chenhao288@...ilicon.com>, <huangguangbin2@...wei.com>,
        <linux-s390@...r.kernel.org>
Subject: [PATCH V5 net-next 1/6] ethtool: add support to set/get tx copybreak buf size via ethtool

From: Hao Chen <chenhao288@...ilicon.com>

Add support for ethtool to set/get tx copybreak buf size.

Signed-off-by: Hao Chen <chenhao288@...ilicon.com>
Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
---
 include/uapi/linux/ethtool.h | 1 +
 net/ethtool/common.c         | 1 +
 net/ethtool/ioctl.c          | 1 +
 3 files changed, 3 insertions(+)

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index a2223b685451..7bc4b8def12c 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -231,6 +231,7 @@ enum tunable_id {
 	ETHTOOL_RX_COPYBREAK,
 	ETHTOOL_TX_COPYBREAK,
 	ETHTOOL_PFC_PREVENTION_TOUT, /* timeout in msecs */
+	ETHTOOL_TX_COPYBREAK_BUF_SIZE,
 	/*
 	 * Add your fresh new tunable attribute above and remember to update
 	 * tunable_strings[] in net/ethtool/common.c
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index c63e0739dc6a..0c5210015911 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -89,6 +89,7 @@ tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_RX_COPYBREAK]	= "rx-copybreak",
 	[ETHTOOL_TX_COPYBREAK]	= "tx-copybreak",
 	[ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
+	[ETHTOOL_TX_COPYBREAK_BUF_SIZE] = "tx-copybreak-buf-size",
 };
 
 const char
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 44430b6ab843..3dc81edf5ca5 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2382,6 +2382,7 @@ static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
 	switch (tuna->id) {
 	case ETHTOOL_RX_COPYBREAK:
 	case ETHTOOL_TX_COPYBREAK:
+	case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
 		if (tuna->len != sizeof(u32) ||
 		    tuna->type_id != ETHTOOL_TUNABLE_U32)
 			return -EINVAL;
-- 
2.33.0