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

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Date: Fri, 23 Feb 2024 11:24:44 -0800
From: Rahul Rameshbabu <rrameshbabu@...dia.com>
To: 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>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Dragos Tatulea <dtatulea@...dia.com>
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org,
	Rahul Rameshbabu <rrameshbabu@...dia.com>
Subject: [PATCH RFC net-next v1 0/6] ethtool HW timestamping statistics

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/

Signed-off-by: Rahul Rameshbabu <rrameshbabu@...dia.com>
---
Rahul Rameshbabu (6):
  ethtool: add interface to read Tx hardware timestamping statistics
  net/mlx5e: Introduce lost_cqe statistic counter for PTP Tx port
    timestamping CQ
  net/mlx5e: Introduce timestamps statistic counter for Tx DMA layer
  net/mlx5e: Implement ethtool hardware timestamping statistics
  tools: ynl: ethtool.py: Make tool invokable from any CWD
  tools: ynl: ethtool.py: Add ts ethtool statistics group

 .../ethernet/mellanox/mlx5/counters.rst       | 11 +++
 .../net/ethernet/mellanox/mlx5/core/en/ptp.c  |  1 +
 .../ethernet/mellanox/mlx5/core/en_ethtool.c  |  9 +++
 .../ethernet/mellanox/mlx5/core/en_stats.c    | 71 +++++++++++++++++++
 .../ethernet/mellanox/mlx5/core/en_stats.h    |  4 ++
 .../net/ethernet/mellanox/mlx5/core/en_tx.c   |  6 +-
 include/linux/ethtool.h                       | 28 ++++++++
 include/uapi/linux/ethtool.h                  | 20 ++++++
 include/uapi/linux/ethtool_netlink.h          | 17 +++++
 net/ethtool/netlink.h                         |  3 +-
 net/ethtool/stats.c                           | 53 ++++++++++++--
 net/ethtool/strset.c                          |  5 ++
 tools/net/ynl/ethtool.py                      |  9 ++-
 13 files changed, 227 insertions(+), 10 deletions(-)

-- 
2.42.0