netdev - Get MAC supported link modes for SFP port

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Message-ID: <87pn40uo25.fsf@tarshish>
Date:   Thu, 26 Nov 2020 17:37:22 +0200
From:   Baruch Siach <baruch@...s.co.il>
To:     netdev@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>
Subject: Get MAC supported link modes for SFP port

Hi netdev list,

I am trying to retrieve all MAC supported link modes
(ETHTOOL_LINK_MODE_*) for network interfaces with SFP port. The
'supported' bit mask that ETHTOOL_GLINKSETTINGS provides in
link_mode_masks[] changes to match the SFP module that happens to be
plugged in. When no SFP module is plugged, the bit mask looks
meaningless.

I understand that ETHTOOL_LINK_MODE_* bits are meant to describe PHY
level capabilities. So I would settle for a MAC level "supported rates"
list.

Is there anything like that?

Thanks,
baruch

-- 
                                                     ~. .~   Tk Open Systems
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