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authorOleksij Rempel <o.rempel@pengutronix.de>2020-05-20 09:29:14 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-22 03:18:00 +0300
commit8066021915924f58ed338bf38208215f5a7355f6 (patch)
tree2433e62686485794774f5366c6f86b2efff9f4f2 /Documentation/networking/ethtool-netlink.rst
parentb0301a5a288d804374b194e755180967ff7a295b (diff)
downloadlinux-8066021915924f58ed338bf38208215f5a7355f6.tar.xz
ethtool: provide UAPI for PHY Signal Quality Index (SQI)
Signal Quality Index is a mandatory value required by "OPEN Alliance SIG" for the 100Base-T1 PHYs [1]. This indicator can be used for cable integrity diagnostic and investigating other noise sources and implement by at least two vendors: NXP[2] and TI[3]. [1] http://www.opensig.org/download/document/218/Advanced_PHY_features_for_automotive_Ethernet_V1.0.pdf [2] https://www.nxp.com/docs/en/data-sheet/TJA1100.pdf [3] https://www.ti.com/product/DP83TC811R-Q1 Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/ethtool-netlink.rst')
-rw-r--r--Documentation/networking/ethtool-netlink.rst6
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index eed46b6aa07d..7e651ea33eab 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -454,10 +454,12 @@ Request contents:
Kernel response contents:
- ==================================== ====== ==========================
+ ==================================== ====== ============================
``ETHTOOL_A_LINKSTATE_HEADER`` nested reply header
``ETHTOOL_A_LINKSTATE_LINK`` bool link state (up/down)
- ==================================== ====== ==========================
+ ``ETHTOOL_A_LINKSTATE_SQI`` u32 Current Signal Quality Index
+ ``ETHTOOL_A_LINKSTATE_SQI_MAX`` u32 Max support SQI value
+ ==================================== ====== ============================
For most NIC drivers, the value of ``ETHTOOL_A_LINKSTATE_LINK`` returns
carrier flag provided by ``netif_carrier_ok()`` but there are drivers which