netdev - Re: [PATCH net-next v2 0/6] ethtool: add standard FEC statistics

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Date:   Tue, 18 May 2021 14:48:13 +0800
From:   "huangguangbin (A)" <huangguangbin2@...wei.com>
To:     Jakub Kicinski <kuba@...nel.org>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <michael.chan@...adcom.com>,
        <saeedm@...dia.com>, <leon@...nel.org>, <ecree.xilinx@...il.com>,
        <habetsm.xilinx@...il.com>, <f.fainelli@...il.com>,
        <andrew@...n.ch>, <mkubecek@...e.cz>, <ariela@...dia.com>
Subject: Re: [PATCH net-next v2 0/6] ethtool: add standard FEC statistics



On 2021/4/16 6:53, Jakub Kicinski wrote:
> 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
> 
Hi, I have a doubt that why active FEC encoding is None here?  Should it actually be BaseR or RS if FEC statistics are reported?

> v2: check for errors in mlx5 register access
> 
> 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    | 29 ++++++-
>   .../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, 242 insertions(+), 12 deletions(-)
>