linux-kernel - Re: [PATCH RFC net-next v1 0/6] ethtool HW timestamping statistics

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Message-ID: <87ttlyvltg.fsf@nvidia.com>
Date: Fri, 23 Feb 2024 14:47:37 -0800
From: Rahul Rameshbabu <rrameshbabu@...dia.com>
To: Jacob Keller <jacob.e.keller@...el.com>
Cc: Saeed Mahameed <saeed@...nel.org>, Leon Romanovsky <leon@...nel.org>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Jonathan Corbet <corbet@....net>, Richard Cochran
 <richardcochran@...il.com>, Tariq Toukan <tariqt@...dia.com>, Gal Pressman
 <gal@...dia.com>, Vadim Fedorenko <vadim.fedorenko@...ux.dev>, Andrew Lunn
 <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, Przemek Kitszel
 <przemyslaw.kitszel@...el.com>, Ahmed  Zaki <ahmed.zaki@...el.com>,
 Alexander Lobakin <aleksander.lobakin@...el.com>, Hangbin Liu
 <liuhangbin@...il.com>, Paul  Greenwalt <paul.greenwalt@...el.com>, Justin
 Stitt <justinstitt@...gle.com>, Randy Dunlap <rdunlap@...radead.org>,
 Maxime Chevallier <maxime.chevallier@...tlin.com>, Kory Maincent
 <kory.maincent@...tlin.com>, Wojciech Drewek <wojciech.drewek@...el.com>,
 Vladimir Oltean <vladimir.oltean@....com>, Jiri Pirko <jiri@...nulli.us>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>, Jose Abreu
 <joabreu@...opsys.com>, Dragos  Tatulea <dtatulea@...dia.com>,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-doc@...r.kernel.org
Subject: Re: [PATCH RFC net-next v1 0/6] ethtool HW timestamping statistics

On Fri, 23 Feb, 2024 13:00:10 -0800 Jacob Keller <jacob.e.keller@...el.com> wrote:
> On 2/23/2024 11:24 AM, Rahul Rameshbabu wrote:
>> The goal of this patch series is to introduce a common set of ethtool statistics
>> for hardware timestamping that a driver implementer can hook into. The
>> statistics counters added are based on what I believe are common
>> patterns/behaviors found across various hardware timestamping implementations
>> seen in the kernel tree today. The mlx5 family of devices is used as the PoC for
>> this patch series. Other vendors are more than welcome to chim in on this
>> series.
>> 
>> Statistics can be queried from either the DMA or PHY layers. I think this
>> concept of layer-based statistics selection and the general timestamping layer
>> selection work Kory Maincent is working on can be converged together [1].
>> 
>> [1] https://lore.kernel.org/netdev/20240216-feature_ptp_netnext-v8-0-510f42f444fb@bootlin.com/
>> 
>
> Makes sense! I like this direction, I had meant to work on this for the
> Intel parts, but got sidetracked by other tasks.

I still have a back burner task for a cyclecounter API change you
suggested a while back.... Hoping to get to that after getting some
large features out of the way in the next two months.

--
Thanks,

Rahul Rameshbabu