netdev - [PATCH ethtool 1/5] ethtool: Extend ethtool link modes settings uAPI with lanes

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Message-Id: <20210106131006.2110613-2-danieller@mellanox.com>
Date:   Wed,  6 Jan 2021 15:10:02 +0200
From:   Danielle Ratson <danieller@...lanox.com>
To:     netdev@...r.kernel.org
Cc:     mkubecek@...e.cz, f.fainelli@...il.com, kuba@...nel.org,
        andrew@...n.ch, mlxsw@...dia.com,
        Danielle Ratson <danieller@...lanox.com>
Subject: [PATCH ethtool 1/5] ethtool: Extend ethtool link modes settings uAPI with lanes

Add ETHTOOL_A_LINKMODES_LANES, expand ethtool_link_settings with
lanes attribute and define valid lanes in order to support a new
lanes-selector.

Signed-off-by: Danielle Ratson <danieller@...lanox.com>
Reviewed-by: Jiri Pirko <jiri@...dia.com>
---
 netlink/desc-ethtool.c       | 1 +
 uapi/linux/ethtool.h         | 8 ++++++++
 uapi/linux/ethtool_netlink.h | 1 +
 3 files changed, 10 insertions(+)

diff --git a/netlink/desc-ethtool.c b/netlink/desc-ethtool.c
index 96291b9..fe5d7ba 100644
--- a/netlink/desc-ethtool.c
+++ b/netlink/desc-ethtool.c
@@ -87,6 +87,7 @@ static const struct pretty_nla_desc __linkmodes_desc[] = {
 	NLATTR_DESC_U8(ETHTOOL_A_LINKMODES_DUPLEX),
 	NLATTR_DESC_U8(ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG),
 	NLATTR_DESC_U8(ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE),
+	NLATTR_DESC_U32(ETHTOOL_A_LINKMODES_LANES),
 };
 
 static const struct pretty_nla_desc __linkstate_desc[] = {
diff --git a/uapi/linux/ethtool.h b/uapi/linux/ethtool.h
index 052689b..85ec9c8 100644
--- a/uapi/linux/ethtool.h
+++ b/uapi/linux/ethtool.h
@@ -1736,6 +1736,14 @@ static __inline__ int ethtool_validate_speed(__u32 speed)
 	return speed <= INT_MAX || speed == (__u32)SPEED_UNKNOWN;
 }
 
+/* Lanes, 1, 2, 4 or 8. */
+#define ETHTOOL_LANES_1			1
+#define ETHTOOL_LANES_2			2
+#define ETHTOOL_LANES_4			4
+#define ETHTOOL_LANES_8			8
+
+#define ETHTOOL_LANES_UNKNOWN		0
+
 /* Duplex, half or full. */
 #define DUPLEX_HALF		0x00
 #define DUPLEX_FULL		0x01
diff --git a/uapi/linux/ethtool_netlink.h b/uapi/linux/ethtool_netlink.h
index c022883..0cd6906 100644
--- a/uapi/linux/ethtool_netlink.h
+++ b/uapi/linux/ethtool_netlink.h
@@ -227,6 +227,7 @@ enum {
 	ETHTOOL_A_LINKMODES_DUPLEX,		/* u8 */
 	ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG,	/* u8 */
 	ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE,	/* u8 */
+	ETHTOOL_A_LINKMODES_LANES,		/* u32 */
 
 	/* add new constants above here */
 	__ETHTOOL_A_LINKMODES_CNT,
-- 
2.26.2