Le Tue, 19 Aug 2025 09:12:54 +0200, Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> a écrit : > Extend ETHTOOL_MSG_LINKSTATE_GET to optionally return a simplified > Mean Square Error (MSE) reading alongside existing link status fields. > > The new attributes are: > - ETHTOOL_A_LINKSTATE_MSE_VALUE: current average MSE value > - ETHTOOL_A_LINKSTATE_MSE_MAX: scale limit for the reported value > - ETHTOOL_A_LINKSTATE_MSE_CHANNEL: source channel selector > > This path reuses the PHY MSE core API, but only retrieves a single > value intended for quick link-health checks: > * If the PHY supports a WORST channel selector, report its current > average MSE. > * Otherwise, if LINK-wide measurements are supported, report those. > * If neither is available, omit the attributes. > > Unlike the full MSE_GET interface, LINKSTATE_GET does not expose > per-channel or peak/worst-peak values and incurs minimal overhead. > Drivers that implement get_mse_config() / get_mse_snapshot() will > automatically populate this data. > > The intent is to provide tooling with a “fast path” health indicator > without issuing a separate MSE_GET request, though the long-term > overlap with the full interface may need reevaluation. Reviewed-by: Kory Maincent <kory.maincent@xxxxxxxxxxx> Thank you! -- Köry Maincent, Bootlin Embedded Linux and kernel engineering https://bootlin.com
