netdev - Re: [PATCH net-next RFC v4 4/5] net: Let the active time stamping layer be selectable.

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Message-ID: <20230511155439.7652757c@kernel.org>
Date: Thu, 11 May 2023 15:54:39 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Vladimir Oltean <vladimir.oltean@....com>, Köry Maincent
 <kory.maincent@...tlin.com>, netdev@...r.kernel.org, glipus@...il.com,
 maxime.chevallier@...tlin.com, vadim.fedorenko@...ux.dev,
 richardcochran@...il.com, gerhard@...leder-embedded.com,
 thomas.petazzoni@...tlin.com, krzysztof.kozlowski+dt@...aro.org,
 robh+dt@...nel.org
Subject: Re: [PATCH net-next RFC v4 4/5] net: Let the active time stamping
 layer be selectable.

On Thu, 11 May 2023 22:06:36 +0100 Russell King (Oracle) wrote:
> I haven't thought this through fully, but just putting this out there
> as a potential suggestion...
> 
> Would it help at all if we distilled the entire timestamping interface
> into a separate set of ops which are registered independently from the
> NDO, and NDO has a call to get the ops for the layer being configured?
> 
> That would allow a netdev driver to return the ops appropriate for the
> MAC layer or its own PHY layer, or maybe phylib.
> 
> In the case of phylib, as there is a raft of drivers that only bind to
> their phylib PHY in the NDO open method, we'd need to figure out how
> to get the ops for the current mode at that time.
> 
> There's probably lots I've missed though...

Sounds reasonable, only question is what to pass as the object (first
argument) of these ops. Some new struct?