netdev - Re: [PATCH net-next 6/6] mlx5: implement ethtool::get_fec

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Date:   Wed, 14 Apr 2021 23:37:59 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     Jakub Kicinski <kuba@...nel.org>, davem@...emloft.net
Cc:     netdev@...r.kernel.org, michael.chan@...adcom.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 6/6] mlx5: implement ethtool::get_fec_stats

On Tue, 2021-04-13 at 20:44 -0700, Jakub Kicinski wrote:
> Report corrected bits.
> 
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> ---
>  .../ethernet/mellanox/mlx5/core/en_ethtool.c  |  9 ++++++
>  .../ethernet/mellanox/mlx5/core/en_stats.c    | 28
> +++++++++++++++++--
>  
> -#define MLX5E_READ_CTR64_BE_F(ptr, c)                  \
> +#define MLX5E_READ_CTR64_BE_F(ptr, set, c)             \
>         be64_to_cpu(*(__be64 *)((char *)ptr +           \
>                 MLX5_BYTE_OFF(ppcnt_reg,                \
> -
>                        counter_set.eth_802_3_cntrs_grp_data_layout.c##
> _high)))
> +                             counter_set.set.c##_high)))

squint...... looks fine :) 

>  
>  void mlx5e_stats_pause_get(struct mlx5e_priv *priv,
>                            struct ethtool_pause_stats *pause_stats)
> @@ -791,9 +791,11 @@ void mlx5e_stats_pause_get(struct mlx5e_priv
> *priv,
>  
>         pause_stats->tx_pause_frames =
>                 MLX5E_READ_CTR64_BE_F(ppcnt_ieee_802_3,
> +                                    
> eth_802_3_cntrs_grp_data_layout,
>                                      
> a_pause_mac_ctrl_frames_transmitted);
>         pause_stats->rx_pause_frames =
>                 MLX5E_READ_CTR64_BE_F(ppcnt_ieee_802_3,
> +                                    
> eth_802_3_cntrs_grp_data_layout,
>                                      
> a_pause_mac_ctrl_frames_received);
>  }
>  
> @@ -1015,6 +1017,28 @@ static
> MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(phy)
>         mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT,
> 0, 0);
>  }
>  
> +void mlx5e_stats_fec_get(struct mlx5e_priv *priv,
> +                        struct ethtool_fec_stats *fec_stats)
> +{
> +       u32 ppcnt_phy_statistical[MLX5_ST_SZ_DW(ppcnt_reg)];
> +       struct mlx5_core_dev *mdev = priv->mdev;
> +       u32 in[MLX5_ST_SZ_DW(ppcnt_reg)] = {0};
> +       int sz = MLX5_ST_SZ_BYTES(ppcnt_reg);
> +
> +       if (!MLX5_CAP_PCAM_FEATURE(mdev, ppcnt_statistical_group))
> +               return;
> +
> +       MLX5_SET(ppcnt_reg, in, local_port, 1);
> +       MLX5_SET(ppcnt_reg, in, grp,
> MLX5_PHYSICAL_LAYER_STATISTICAL_GROUP);
> +       mlx5_core_access_reg(mdev, in, sz, ppcnt_phy_statistical,
> +                            sz, MLX5_REG_PPCNT, 0, 0);
> +

other than that the FW might fail us here, LGTM.

Acked-by: Saeed Mahameed <saeedm@...dia.com>