Re: [dpdk-dev] [PATCH v2 05/20] common/mlx5: add support for regex capability query

[Thomas Monjalon <thomas@monjalon.net>]

12/07/2020 22:58, Ori Kam:
> From: Yuval Avnery <yuvalav@mellanox.com>
> 
> Update hca cap struct and common query hca cap function.
> 
> Signed-off-by: Yuval Avnery <yuvalav@mellanox.com>
> Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
> 
> ---
>  drivers/common/mlx5/mlx5_devx_cmds.c | 3 +++
>  drivers/common/mlx5/mlx5_devx_cmds.h | 2 ++
>  drivers/common/mlx5/mlx5_prm.h       | 9 +++++++--
>  3 files changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c b/drivers/common/mlx5/mlx5_devx_cmds.c
> index 2179a83..54b20a7 100644
> --- a/drivers/common/mlx5/mlx5_devx_cmds.c
> +++ b/drivers/common/mlx5/mlx5_devx_cmds.c
> @@ -467,6 +467,9 @@ struct mlx5_devx_obj *
>  	attr->vdpa.queue_counters_valid = !!(MLX5_GET64(cmd_hca_cap, hcattr,
>  							general_obj_types) &
>  				  MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_Q_COUNTERS);
> +	attr->regex = MLX5_GET(cmd_hca_cap, hcattr, regexp);
> +	attr->regexp_num_of_engines = MLX5_GET(cmd_hca_cap, hcattr,
> +					       regexp_num_of_engines);
>  	if (attr->qos.sup) {
>  		MLX5_SET(query_hca_cap_in, in, op_mod,
>  			 MLX5_GET_HCA_CAP_OP_MOD_QOS_CAP |
> diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h
> index 25704ef..bb14ca5 100644
> --- a/drivers/common/mlx5/mlx5_devx_cmds.h
> +++ b/drivers/common/mlx5/mlx5_devx_cmds.h
> @@ -90,6 +90,8 @@ struct mlx5_hca_attr {
>  	uint32_t vhca_id:16;
>  	uint32_t relaxed_ordering_write:1;
>  	uint32_t relaxed_ordering_read:1;
> +	uint32_t regex:1;
> +	uint32_t regexp_num_of_engines;
>  	struct mlx5_hca_qos_attr qos;
>  	struct mlx5_hca_vdpa_attr vdpa;
>  };
> diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
> index ede7810..bfbc58b 100644
> --- a/drivers/common/mlx5/mlx5_prm.h
> +++ b/drivers/common/mlx5/mlx5_prm.h
> @@ -1034,9 +1034,14 @@ struct mlx5_ifc_cmd_hca_cap_bits {
>  	u8 log_max_qp_sz[0x8];
>  	u8 reserved_at_90[0xb];
>  	u8 log_max_qp[0x5];
> -	u8 reserved_at_a0[0xb];
> +	u8 regexp[0x1];
> +	u8 reserved_at_a1[0x3];
> +	u8 regexp_num_of_engines[0x4];
> +	u8 reserved_at_a8[0x3];
>  	u8 log_max_srq[0x5];
> -	u8 reserved_at_b0[0x10];
> +	u8 reserved_at_b0[0x3];
> +	u8 regexp_log_crspace_size[0x5];
> +	u8 reserved_at_b8[0x8];
>  	u8 reserved_at_c0[0x8];
>  	u8 log_max_cq_sz[0x8];
>  	u8 reserved_at_d0[0xb];

Really I don't see any meaning in this patch.

Detail: Why using u8 instead of uint8_t?