netdev - Re: [RFC] RJ45 to SFP auto-sensing and switching in mux-ed single-mac devices (XOR RJ/SFP)

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Date: Mon, 4 Sep 2023 00:51:05 +0200
From: Andrew Lunn <andrew@...n.ch>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Nicolò Veronese <nicveronese@...il.com>,
	netdev@...r.kernel.org, simonebortolin@...k-gpon.org,
	nanomad@...k-gpon.org, Federico Cappon <dududede371@...il.com>,
	daniel@...rotopia.org, lorenzo@...nel.org, ftp21@...21.eu,
	pierto88@...k-gpon.org, hitech95@...k-gpon.org, davem@...emloft.net,
	edumazet@...gle.com, hkallweit1@...il.com, kuba@...nel.org,
	pabeni@...hat.com, nbd@....name, maxime.chevallier@...tlin.com
Subject: Re: [RFC] RJ45 to SFP auto-sensing and switching in mux-ed
 single-mac devices (XOR RJ/SFP)

> To solve that sanely, every PHY-based ethtool probably needs a way
> to specify which PHY the command is intended for, but then there's
> the question of how userspace users react to that - because it's
> likely more than just modifying the ethtool utility, ethtool
> commands are probably used from many programs.

This idea of extending ethtool with a PHY ID has discussed last
year. It helps solve some of the problems discussed here. You can then
enumerate all the PHYs connected to a MAC, and operate on each PHY
independently.

https://lore.kernel.org/netdev/20221017105100.0cb33490@pc-8.home/

	Andrew