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ethtool: Extend cable testing interface with result source information

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Extend the ethtool netlink cable testing interface by adding support for
specifying the source of cable testing results. This allows users to
differentiate between results obtained through different diagnostic
methods.

For example, some TI 10BaseT1L PHYs provide two variants of cable
diagnostics: Time Domain Reflectometry (TDR) and Active Link Cable
Diagnostic (ALCD). By introducing `ETHTOOL_A_CABLE_RESULT_SRC` and
`ETHTOOL_A_CABLE_FAULT_LENGTH_SRC` attributes, this update enables
drivers to indicate whether the result was derived from TDR or ALCD,
improving the clarity and utility of diagnostic information.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240822120703.1393130-2-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Oleksij Rempel 2024-08-22 14:07:01 +02:00 • committed by Jakub Kicinski
parent b494b16738
commit abcd3026dd
3 changed files with 22 additions and 0 deletions
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6
Documentation/netlink/specs/ethtool.yaml
View file

@ -667,6 +667,9 @@ attribute-sets:
-
name: code
type: u8
-
name: src
type: u32
-
name: cable-fault-length
attributes:
@ -676,6 +679,9 @@ attribute-sets:
-
name: cm
type: u32
-
name: src
type: u32
-
name: cable-nest
attributes:

5
Documentation/networking/ethtool-netlink.rst
View file

@ -1314,12 +1314,17 @@ information.
+-+-+-----------------------------------------+--------+---------------------+
| | | ``ETHTOOL_A_CABLE_RESULTS_CODE`` | u8 | result code |
+-+-+-----------------------------------------+--------+---------------------+
| | | ``ETHTOOL_A_CABLE_RESULT_SRC`` | u32 | information source |
+-+-+-----------------------------------------+--------+---------------------+
| | ``ETHTOOL_A_CABLE_NEST_FAULT_LENGTH`` | nested | cable length |
+-+-+-----------------------------------------+--------+---------------------+
| | | ``ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR`` | u8 | pair number |
+-+-+-----------------------------------------+--------+---------------------+
| | | ``ETHTOOL_A_CABLE_FAULT_LENGTH_CM`` | u32 | length in cm |
+-+-+-----------------------------------------+--------+---------------------+
| | | ``ETHTOOL_A_CABLE_FAULT_LENGTH_SRC`` | u32 | information source |
+-+-+-----------------------------------------+--------+---------------------+
CABLE_TEST TDR
==============

11
include/uapi/linux/ethtool_netlink.h
View file

@ -573,10 +573,20 @@ enum {
ETHTOOL_A_CABLE_PAIR_D,
};
/* Information source for specific results. */
enum {
ETHTOOL_A_CABLE_INF_SRC_UNSPEC,
/* Results provided by the Time Domain Reflectometry (TDR) */
ETHTOOL_A_CABLE_INF_SRC_TDR,
/* Results provided by the Active Link Cable Diagnostic (ALCD) */
ETHTOOL_A_CABLE_INF_SRC_ALCD,
};
enum {
ETHTOOL_A_CABLE_RESULT_UNSPEC,
ETHTOOL_A_CABLE_RESULT_PAIR, /* u8 ETHTOOL_A_CABLE_PAIR_ */
ETHTOOL_A_CABLE_RESULT_CODE, /* u8 ETHTOOL_A_CABLE_RESULT_CODE_ */
ETHTOOL_A_CABLE_RESULT_SRC, /* u32 ETHTOOL_A_CABLE_INF_SRC_ */
__ETHTOOL_A_CABLE_RESULT_CNT,
ETHTOOL_A_CABLE_RESULT_MAX = (__ETHTOOL_A_CABLE_RESULT_CNT - 1)
@ -586,6 +596,7 @@ enum {
ETHTOOL_A_CABLE_FAULT_LENGTH_UNSPEC,
ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR, /* u8 ETHTOOL_A_CABLE_PAIR_ */
ETHTOOL_A_CABLE_FAULT_LENGTH_CM, /* u32 */
ETHTOOL_A_CABLE_FAULT_LENGTH_SRC, /* u32 ETHTOOL_A_CABLE_INF_SRC_ */
__ETHTOOL_A_CABLE_FAULT_LENGTH_CNT,
ETHTOOL_A_CABLE_FAULT_LENGTH_MAX = (__ETHTOOL_A_CABLE_FAULT_LENGTH_CNT - 1)