[PATCH v2 3/3] netlink: add LINKSTATE SQI support

From: Oleksij Rempel <o.rempel@pengutronix.de>
To: Andrew Lunn <andrew@lunn.ch>,
	"David S. Miller" <davem@davemloft.net>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Jonathan Corbet <corbet@lwn.net>,
	Michal Kubecek <mkubecek@suse.cz>,
	"John W. Linville" <linville@tuxdriver.com>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>,
	David Jander <david@protonic.nl>,
	kernel@pengutronix.de, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
	mkl@pengutronix.de, Marek Vasut <marex@denx.de>,
	Christian Herber <christian.herber@nxp.com>,
	Amit Cohen <amitc@mellanox.com>,
	Petr Machata <petrm@mellanox.com>
Subject: [PATCH v2 3/3] netlink: add LINKSTATE SQI support
Date: Thu, 28 May 2020 13:54:14 +0200	[thread overview]
Message-ID: <20200528115414.11516-4-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20200528115414.11516-1-o.rempel@pengutronix.de>

Some PHYs provide Signal Quality Index (SQI) if the link is in active
state. This information can help to diagnose cable and system design
related issues.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
 netlink/desc-ethtool.c |  2 ++
 netlink/settings.c     | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/netlink/desc-ethtool.c b/netlink/desc-ethtool.c
index b0a793c..8f4c36b 100644
--- a/netlink/desc-ethtool.c
+++ b/netlink/desc-ethtool.c
@@ -93,6 +93,8 @@ static const struct pretty_nla_desc __linkstate_desc[] = {
 	NLATTR_DESC_INVALID(ETHTOOL_A_LINKSTATE_UNSPEC),
 	NLATTR_DESC_NESTED(ETHTOOL_A_LINKSTATE_HEADER, header),
 	NLATTR_DESC_BOOL(ETHTOOL_A_LINKSTATE_LINK),
+	NLATTR_DESC_U32(ETHTOOL_A_LINKSTATE_SQI),
+	NLATTR_DESC_U32(ETHTOOL_A_LINKSTATE_SQI_MAX),
 };
 
 static const struct pretty_nla_desc __debug_desc[] = {
diff --git a/netlink/settings.c b/netlink/settings.c
index 851de15..cd4b9a7 100644
--- a/netlink/settings.c
+++ b/netlink/settings.c
@@ -638,6 +638,22 @@ int linkstate_reply_cb(const struct nlmsghdr *nlhdr, void *data)
 		printf("\tLink detected: %s\n", val ? "yes" : "no");
 	}
 
+	if (tb[ETHTOOL_A_LINKSTATE_SQI]) {
+		uint32_t val = mnl_attr_get_u32(tb[ETHTOOL_A_LINKSTATE_SQI]);
+
+		print_banner(nlctx);
+		printf("\tSQI: %u", val);
+
+		if (tb[ETHTOOL_A_LINKSTATE_SQI_MAX]) {
+			uint32_t max;
+
+			max = mnl_attr_get_u32(tb[ETHTOOL_A_LINKSTATE_SQI_MAX]);
+			printf("/%u\n", max);
+		} else {
+			printf("\n");
+		}
+	}
+
 	return MNL_CB_OK;
 }
 
-- 
2.26.2

