netdev - Re: [PATCH v8 net-next 4/5] net: ena: PHC stats through sysfs

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Message-ID: <20250305183637.2e0f6a9f@kernel.org>
Date: Wed, 5 Mar 2025 18:36:37 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Andrew Lunn <andrew@...n.ch>
Cc: David Arinzon <darinzon@...zon.com>, David Miller <davem@...emloft.net>,
 netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, Richard Cochran
 <richardcochran@...il.com>, "Woodhouse, David" <dwmw@...zon.com>,
 "Machulsky, Zorik" <zorik@...zon.com>, "Matushevsky, Alexander"
 <matua@...zon.com>, Saeed Bshara <saeedb@...zon.com>, "Wilson, Matt"
 <msw@...zon.com>, "Liguori, Anthony" <aliguori@...zon.com>, "Bshara, Nafea"
 <nafea@...zon.com>, "Schmeilin, Evgeny" <evgenys@...zon.com>, "Belgazal,
 Netanel" <netanel@...zon.com>, "Saidi, Ali" <alisaidi@...zon.com>,
 "Herrenschmidt, Benjamin" <benh@...zon.com>, "Kiyanovski, Arthur"
 <akiyano@...zon.com>, "Dagan, Noam" <ndagan@...zon.com>, "Bernstein, Amit"
 <amitbern@...zon.com>, "Agroskin, Shay" <shayagr@...zon.com>, "Ostrovsky,
 Evgeny" <evostrov@...zon.com>, "Tabachnik, Ofir" <ofirt@...zon.com>,
 "Machnikowski, Maciek" <maciek@...hnikowski.net>, Rahul Rameshbabu
 <rrameshbabu@...dia.com>, Gal Pressman <gal@...dia.com>, Vadim Fedorenko
 <vadim.fedorenko@...ux.dev>
Subject: Re: [PATCH v8 net-next 4/5] net: ena: PHC stats through sysfs

On Wed, 5 Mar 2025 16:33:10 +0100 Andrew Lunn wrote:
> > I asked them to do this.
> > They are using a PTP device as a pure clock. The netdev doesn't support
> > any HW timestamping, so none of the stats are related to packets.  
> 
> So how intertwined is the PHC with the network device? Can it be
> separated into a different driver? Moved into drivers/ptp?
> 
> We have already been asked if this means network drivers can be
> configured via sysfs. Clearly we don't want that, so we want to get
> this code out of drivers/net if possible.

Is it good enough to move the relevant code to a ptp/ or phc/ dir
under ...thernet/amazon/ena/ ? Moving it to ptp/ proper would require
some weird abstractions, not sure if it's warranted?