Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7;
Date:   Mon, 20 Nov 2023 10:17:57 +0100
From:   =?UTF-8?B?S8O2cnk=?= Maincent <kory.maincent@bootlin.com>
To:     Jakub Kicinski <kuba@kernel.org>
Cc:     Florian Fainelli <florian.fainelli@broadcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@broadcom.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>,
        Richard Cochran <richardcochran@gmail.com>,
        Radu Pirea <radu-nicolae.pirea@oss.nxp.com>,
        Jay Vosburgh <j.vosburgh@gmail.com>,
        Andy Gospodarek <andy@greyhouse.net>,
        Nicolas Ferre <nicolas.ferre@microchip.com>,
        Claudiu Beznea <claudiu.beznea@tuxon.dev>,
        Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Horatiu Vultur <horatiu.vultur@microchip.com>,
        UNGLinuxDriver@microchip.com, Simon Horman <horms@kernel.org>,
        Vladimir Oltean <vladimir.oltean@nxp.com>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-doc@vger.kernel.org,
        Maxime Chevallier <maxime.chevallier@bootlin.com>
Subject: Re: [PATCH net-next v7 08/16] net: ethtool: Add a command to expose
 current time stamping layer
Message-ID: <20231120101757.7ecf40b2@kmaincent-XPS-13-7390>
In-Reply-To: <20231118182424.2d569940@kernel.org>
References: <20231114-feature_ptp_netnext-v7-0-472e77951e40@bootlin.com>
        <20231114-feature_ptp_netnext-v7-8-472e77951e40@bootlin.com>
        <20231118182424.2d569940@kernel.org>
Organization: bootlin
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

On Sat, 18 Nov 2023 18:24:24 -0800
Jakub Kicinski <kuba@kernel.org> wrote:

> On Tue, 14 Nov 2023 12:28:36 +0100 Kory Maincent wrote:
> > +		ops->get_ts_info(dev, &ts_info);
> > +		if (ts_info.so_timestamping &
> > +		    SOF_TIMESTAMPING_HARDWARE_MASK)
> > +			data->ts_layer =3D MAC_TIMESTAMPING;
> > +
> > +		if (ts_info.so_timestamping &
> > +		    SOF_TIMESTAMPING_SOFTWARE_MASK)
> > +			data->ts_layer =3D SOFTWARE_TIMESTAMPING; =20
>=20
> How does this work? so_timestamping is capabilities, not what's
> enabled now. So if driver supports SW stamping we always return
> SOFTWARE?

Yes, the software timestamping comes from the MAC capabilities.
I decided to separate software and MAC timestamping. If we select PHY
timestamping we can't use software timestamping and for an user, selecting =
the
MAC as timestamping seems not logical to use software timestamping.

Indeed there is a mistake here I should have used "else if" condition.
Mmh in fact, maybe not, because it would breaks the access to software
timestamping until patch 13.
I will remove the SOFTWARE/MAC timestamping distinction from this patch.

Regards,
--=20
K=C3=B6ry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com