netdev - Re: [PATCH net-next 3/6] net/mlx5: Add DCBX firmware commands support

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Date:   Wed, 31 Aug 2016 19:24:03 +0800
From:   zhuyj <zyjzyj2000@...il.com>
To:     Saeed Mahameed <saeedm@...lanox.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>, Huy Nguyen <huyn@...lanox.com>
Subject: Re: [PATCH net-next 3/6] net/mlx5: Add DCBX firmware commands support

+       u32 in[MLX5_ST_SZ_DW(dcbx_param)];
+
+       memset(in, 0, sizeof(in));

can we replace the above with "u32 in[MLX5_ST_SZ_DW(dcbx_param)] = {0};"?



On Tue, Aug 30, 2016 at 7:29 PM, Saeed Mahameed <saeedm@...lanox.com> wrote:
> From: Huy Nguyen <huyn@...lanox.com>
>
> Add set/query commands for DCBX_PARAM register
>
> Signed-off-by: Huy Nguyen <huyn@...lanox.com>
> Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/port.c | 22 ++++++++++++++++++++++
>  include/linux/mlx5/driver.h                    |  7 +++++++
>  include/linux/mlx5/port.h                      |  2 ++
>  3 files changed, 31 insertions(+)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/port.c b/drivers/net/ethernet/mellanox/mlx5/core/port.c
> index 2f75f86..8a66595 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/port.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/port.c
> @@ -548,6 +548,28 @@ int mlx5_max_tc(struct mlx5_core_dev *mdev)
>         return num_tc - 1;
>  }
>
> +int mlx5_query_port_dcbx_param(struct mlx5_core_dev *mdev, u32 *out)
> +{
> +       u32 in[MLX5_ST_SZ_DW(dcbx_param)];
> +
> +       memset(in, 0, sizeof(in));
> +
> +       MLX5_SET(dcbx_param, in, port_number, 1);
> +
> +       return  mlx5_core_access_reg(mdev, in, sizeof(in), out,
> +                                   sizeof(in), MLX5_REG_DCBX_PARAM, 0, 0);
> +}
> +
> +int mlx5_set_port_dcbx_param(struct mlx5_core_dev *mdev, u32 *in)
> +{
> +       u32 out[MLX5_ST_SZ_DW(dcbx_param)];
> +
> +       MLX5_SET(dcbx_param, in, port_number, 1);
> +
> +       return mlx5_core_access_reg(mdev, in, sizeof(out), out,
> +                                   sizeof(out), MLX5_REG_DCBX_PARAM, 0, 1);
> +}
> +
>  int mlx5_set_port_prio_tc(struct mlx5_core_dev *mdev, u8 *prio_tc)
>  {
>         u32 in[MLX5_ST_SZ_DW(qtct_reg)] = {0};
> diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
> index 5cb9fa7..b53f19c 100644
> --- a/include/linux/mlx5/driver.h
> +++ b/include/linux/mlx5/driver.h
> @@ -104,6 +104,8 @@ enum {
>  enum {
>         MLX5_REG_QETCR           = 0x4005,
>         MLX5_REG_QTCT            = 0x400a,
> +       MLX5_REG_DCBX_PARAM      = 0x4020,
> +       MLX5_REG_DCBX_APP        = 0x4021,
>         MLX5_REG_PCAP            = 0x5001,
>         MLX5_REG_PMTU            = 0x5003,
>         MLX5_REG_PTYS            = 0x5004,
> @@ -123,6 +125,11 @@ enum {
>         MLX5_REG_MLCR            = 0x902b,
>  };
>
> +enum mlx5_dcbx_oper_mode {
> +       MLX5E_DCBX_PARAM_VER_OPER_HOST  = 0x0,
> +       MLX5E_DCBX_PARAM_VER_OPER_AUTO  = 0x3,
> +};
> +
>  enum {
>         MLX5_ATOMIC_OPS_CMP_SWAP        = 1 << 0,
>         MLX5_ATOMIC_OPS_FETCH_ADD       = 1 << 1,
> diff --git a/include/linux/mlx5/port.h b/include/linux/mlx5/port.h
> index ddad24d..62e2259 100644
> --- a/include/linux/mlx5/port.h
> +++ b/include/linux/mlx5/port.h
> @@ -159,4 +159,6 @@ void mlx5_query_port_fcs(struct mlx5_core_dev *mdev, bool *supported,
>  int mlx5_query_module_eeprom(struct mlx5_core_dev *dev,
>                              u16 offset, u16 size, u8 *data);
>
> +int mlx5_query_port_dcbx_param(struct mlx5_core_dev *mdev, u32 *out);
> +int mlx5_set_port_dcbx_param(struct mlx5_core_dev *mdev, u32 *in);
>  #endif /* __MLX5_PORT_H__ */
> --
> 2.7.4
>