netdev - [RFC PATCH ethtool-next v2 6/6] ethtool: Add transceiver module extended states

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Message-Id: <20210818155306.1278356-7-idosch@idosch.org>
Date:   Wed, 18 Aug 2021 18:53:06 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, andrew@...n.ch,
        mkubecek@...e.cz, pali@...nel.org, jacob.e.keller@...el.com,
        jiri@...dia.com, vadimp@...dia.com, mlxsw@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [RFC PATCH ethtool-next v2 6/6] ethtool: Add transceiver module extended states

From: Ido Schimmel <idosch@...dia.com>

Add support for an extended state and two extended sub-states to
describe link issues related to transceiver modules.

Output example:

 $ ethtool swp13
 ...
 Link detected: no (Module, Module is in low power mode)

In case "CMIS transceiver module is not in ModuleReady state" and the
module is in ModuleFault state, it is possible to read the fault reason
from the EEPROM dump.

Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 netlink/settings.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/netlink/settings.c b/netlink/settings.c
index e47a38f3058f..515b9302c09d 100644
--- a/netlink/settings.c
+++ b/netlink/settings.c
@@ -593,6 +593,7 @@ static const char *const names_link_ext_state[] = {
 	[ETHTOOL_LINK_EXT_STATE_CALIBRATION_FAILURE]	= "Calibration failure",
 	[ETHTOOL_LINK_EXT_STATE_POWER_BUDGET_EXCEEDED]	= "Power budget exceeded",
 	[ETHTOOL_LINK_EXT_STATE_OVERHEAT]		= "Overheat",
+	[ETHTOOL_LINK_EXT_STATE_MODULE]			= "Module",
 };
 
 static const char *const names_autoneg_link_ext_substate[] = {
@@ -648,6 +649,13 @@ static const char *const names_cable_issue_link_ext_substate[] = {
 		"Cable test failure",
 };
 
+static const char *const names_module_link_ext_substate[] = {
+	[ETHTOOL_LINK_EXT_SUBSTATE_MODULE_LOW_POWER_MODE]	=
+		"Module is in low power mode",
+	[ETHTOOL_LINK_EXT_SUBSTATE_MODULE_CMIS_NOT_READY]	=
+		"CMIS module is not in ModuleReady state",
+};
+
 static const char *link_ext_substate_get(uint8_t link_ext_state_val, uint8_t link_ext_substate_val)
 {
 	switch (link_ext_state_val) {
@@ -671,6 +679,10 @@ static const char *link_ext_substate_get(uint8_t link_ext_state_val, uint8_t lin
 		return get_enum_string(names_cable_issue_link_ext_substate,
 				       ARRAY_SIZE(names_cable_issue_link_ext_substate),
 				       link_ext_substate_val);
+	case ETHTOOL_LINK_EXT_STATE_MODULE:
+		return get_enum_string(names_module_link_ext_substate,
+				       ARRAY_SIZE(names_module_link_ext_substate),
+				       link_ext_substate_val);
 	default:
 		return NULL;
 	}
-- 
2.31.1