netdev - Re: [PATCH RFC net-next 1/5] net: mvpp2: add support for hardware timestamps

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Message-ID: <Z_mJx1qqpYVngnTb@shell.armlinux.org.uk>
Date: Fri, 11 Apr 2025 22:29:43 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Kory Maincent <kory.maincent@...tlin.com>,
	Marcin Wojtas <marcin.s.wojtas@...il.com>, netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH RFC net-next 1/5] net: mvpp2: add support for hardware
 timestamps

On Fri, Apr 11, 2025 at 10:26:31PM +0100, Russell King wrote:
> Add support for hardware timestamps in (e.g.) the PHY by calling
> skb_tx_timestamp() as close as reasonably possible to the point that
> the hardware is instructed to send the queued packets.
> 
> Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>

This patch dates from prior to me joining Oracle, and is unchanged
apart from normal rebasing.

> ---
>  drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> index 416a926a8281..e3f8aa139d1e 100644
> --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> @@ -4439,6 +4439,8 @@ static netdev_tx_t mvpp2_tx(struct sk_buff *skb, struct net_device *dev)
>  		txq_pcpu->count += frags;
>  		aggr_txq->count += frags;
>  
> +		skb_tx_timestamp(skb);
> +
>  		/* Enable transmit */
>  		wmb();
>  		mvpp2_aggr_txq_pend_desc_add(port, frags);
> -- 
> 2.30.2
> 
> 

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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