linux-kernel - Re: [PATCH net-next v7 08/16] net: ethtool: Add a command to expose current time stamping layer

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Message-ID: <20231118182424.2d569940@kernel.org>
Date:   Sat, 18 Nov 2023 18:24:24 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Kory Maincent <kory.maincent@...tlin.com>
Cc:     Florian Fainelli <florian.fainelli@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Richard Cochran <richardcochran@...il.com>,
        Radu Pirea <radu-nicolae.pirea@....nxp.com>,
        Jay Vosburgh <j.vosburgh@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Claudiu Beznea <claudiu.beznea@...on.dev>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Simon Horman <horms@...nel.org>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org,
        Maxime Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH net-next v7 08/16] net: ethtool: Add a command to expose
 current time stamping layer

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 = MAC_TIMESTAMPING;
> +
> +		if (ts_info.so_timestamping &
> +		    SOF_TIMESTAMPING_SOFTWARE_MASK)
> +			data->ts_layer = SOFTWARE_TIMESTAMPING;

How does this work? so_timestamping is capabilities, not what's
enabled now. So if driver supports SW stamping we always return
SOFTWARE?