linux-kernel - Re: [PATCH net-next V2 1/3] ptp: Add ioctl commands to expose raw cycle counter values

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Message-ID: <aLmQiiwI_1Uvb4J3@hoboy.vegasvil.org>
Date: Thu, 4 Sep 2025 06:13:46 -0700
From: Richard Cochran <richardcochran@...il.com>
To: Tariq Toukan <tariqt@...dia.com>
Cc: Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Saeed Mahameed <saeedm@...dia.com>,
	Leon Romanovsky <leon@...nel.org>, Mark Bloch <mbloch@...dia.com>,
	netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org, Gal Pressman <gal@...dia.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Carolina Jubran <cjubran@...dia.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Dragos Tatulea <dtatulea@...dia.com>
Subject: Re: [PATCH net-next V2 1/3] ptp: Add ioctl commands to expose raw
 cycle counter values

On Tue, Aug 12, 2025 at 05:17:06PM +0300, Tariq Toukan wrote:
> From: Carolina Jubran <cjubran@...dia.com>
> 
> Introduce two new ioctl commands, PTP_SYS_OFFSET_PRECISE_CYCLES and
> PTP_SYS_OFFSET_EXTENDED_CYCLES, to allow user space to access the
> raw free-running cycle counter from PTP devices.
> 
> These ioctls are variants of the existing PRECISE and EXTENDED
> offset queries, but instead of returning device time in realtime,
> they return the raw cycle counter value.
> 
> Signed-off-by: Carolina Jubran <cjubran@...dia.com>
> Reviewed-by: Dragos Tatulea <dtatulea@...dia.com>
> Signed-off-by: Tariq Toukan <tariqt@...dia.com>

Acked-by: Richard Cochran <richardcochran@...il.com>