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.

Changes since v1:
        - Dropped the late statistics counter since that was not general enough
        - Dropped the layer selection attribute for timestamping statistics
        - Take Jakub's suggestion and converted to ETHTOOL_FLAG_STATS
        - Provided a working interface to query these new statistics from
          tools/net/ynl/ethtool.py

Link: https://lore.kernel.org/netdev/20240223192658.45893-1-rrameshbabu@nvidia.com/
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.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: Output timestamping statistics from tsinfo-get
    operation

 Documentation/netlink/specs/ethtool.yaml      | 20 +++++++
 .../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    | 48 +++++++++++++++++
 .../ethernet/mellanox/mlx5/core/en_stats.h    |  4 ++
 .../net/ethernet/mellanox/mlx5/core/en_tx.c   |  6 ++-
 include/linux/ethtool.h                       | 21 ++++++++
 include/uapi/linux/ethtool_netlink.h          | 15 ++++++
 net/ethtool/tsinfo.c                          | 52 ++++++++++++++++++-
 tools/net/ynl/ethtool.py                      | 19 +++++--
 11 files changed, 200 insertions(+), 6 deletions(-)

-- 
2.42.0