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Date: Mon, 16 Oct 2023 07:22:04 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: =?UTF-8?B?S8O2cnk=?= Maincent <kory.maincent@bootlin.com>
Cc: Andrew Lunn <andrew@lunn.ch>, Florian Fainelli
 <florian.fainelli@broadcom.com>, netdev@vger.kernel.org,
 linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Thomas Petazzoni
 <thomas.petazzoni@bootlin.com>, "David S . Miller" <davem@davemloft.net>,
 Eric Dumazet <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>,
 Jonathan Corbet <corbet@lwn.net>, Jay Vosburgh <j.vosburgh@gmail.com>, Andy
 Gospodarek <andy@greyhouse.net>, Nicolas Ferre
 <nicolas.ferre@microchip.com>, Claudiu Beznea <claudiu.beznea@tuxon.dev>,
 Horatiu Vultur <horatiu.vultur@microchip.com>,
 UNGLinuxDriver@microchip.com, Broadcom internal kernel review list
 <bcm-kernel-feedback-list@broadcom.com>, Heiner Kallweit
 <hkallweit1@gmail.com>, Russell King <linux@armlinux.org.uk>, Richard
 Cochran <richardcochran@gmail.com>, Radu Pirea
 <radu-nicolae.pirea@oss.nxp.com>, Willem de Bruijn
 <willemdebruijn.kernel@gmail.com>, Vladimir Oltean
 <vladimir.oltean@nxp.com>, Michael Walle <michael@walle.cc>, Jacob Keller
 <jacob.e.keller@intel.com>, Maxime Chevallier
 <maxime.chevallier@bootlin.com>
Subject: Re: [PATCH net-next v5 08/16] net: ethtool: Add a command to expose
 current time stamping layer
Message-ID: <20231016072204.1cb41eab@kernel.org>
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On Mon, 16 Oct 2023 12:41:34 +0200 K=C3=B6ry Maincent wrote:
> > Netdev vs phylib is an implementation detail of Linux.
> > I'm also surprised that you changed this. =20
>=20
> This is the main reason I changed this. This is Linux implementation purp=
ose to
> know whether it should go through netdev or phylib, and then each of these
> drivers could use other timestamps which are hardware related.

For an integrated design there's 90% chance the stamping is done=20
by the MAC. Even if it isn't there's no difference between PHY
and MAC in terms of quality.

But there is a big difference between MAC/PHY and DMA which would
both fall under NETDEV?