[net-next,0/6] ethtool: add standard FEC statistics

Message

Jakub Kicinski April 14, 2021, 3:44 a.m. UTC

Hi!

This set adds uAPI for reporting standard FEC statistics, and
implements it in a handful of drivers.

The statistics are taken from the IEEE standard, with one
extra seemingly popular but not standard statistics added.

The implementation is similar to that of the pause frame
statistics, user requests the stats by setting a bit
(ETHTOOL_FLAG_STATS) in the common ethtool header of
ETHTOOL_MSG_FEC_GET.

Since standard defines the statistics per lane what's
reported is both total and per-lane counters:

 # ethtool  -I --show-fec eth0
 FEC parameters for eth0:
 Configured FEC encodings: None
 Active FEC encoding: None
 Statistics:
  corrected_blocks: 256
    Lane 0: 255
    Lane 1: 1
  uncorrectable_blocks: 145
    Lane 0: 128
    Lane 1: 17


The driver implementations are compile-tested only.
I'm also guessing the semantics, so careful review
from maintainers would be much appreciated!

Jakub Kicinski (6):
  ethtool: move ethtool_stats_init
  ethtool: fec_prepare_data() - jump to error handling
  ethtool: add FEC statistics
  bnxt: implement ethtool::get_fec_stats
  sfc: ef10: implement ethtool::get_fec_stats
  mlx5: implement ethtool::get_fec_stats

 Documentation/networking/ethtool-netlink.rst  | 21 +++++
 Documentation/networking/statistics.rst       |  2 +
 .../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 15 ++++
 .../ethernet/mellanox/mlx5/core/en_ethtool.c  |  9 +++
 .../ethernet/mellanox/mlx5/core/en_stats.c    | 28 ++++++-
 .../ethernet/mellanox/mlx5/core/en_stats.h    |  2 +
 drivers/net/ethernet/sfc/ef10.c               | 17 ++++
 drivers/net/ethernet/sfc/ethtool.c            | 10 +++
 drivers/net/ethernet/sfc/net_driver.h         |  3 +
 include/linux/ethtool.h                       | 46 +++++++++++
 include/uapi/linux/ethtool_netlink.h          | 14 ++++
 net/ethtool/fec.c                             | 80 ++++++++++++++++++-
 net/ethtool/pause.c                           |  6 --
 13 files changed, 241 insertions(+), 12 deletions(-)