NAME

       mlx4dv_query_device - Query device capabilities specific to mlx4

SYNOPSIS

       #include <infiniband/mlx4dv.h>

       int mlx4dv_query_device(struct ibv_context *ctx_in,
                               struct mlx4dv_context *attrs_out);

DESCRIPTION

       mlx4dv_query_device() Query mlx4 specific device information that is usable via the direct
       verbs interface.

       This function returns a version and compatibility mask. The version represents the  format
       of the internal hardware structures that mlx4dv.h exposes.  Future additions of new fields
       to the existing structures are handled by the comp_mask field.

       struct mlx4dv_context {
               uint8_t         version;
               uint32_t        max_inl_recv_sz; /* Maximum supported size of inline receive  */
               uint64_t        comp_mask;
       };

RETURN VALUE

       0 on success or the value of errno on failure (which indicates the failure reason).

NOTES

        * Compatibility mask (comp_mask) is an in/out field.

SEE ALSO

       mlx4dv(7), ibv_query_device(3)

AUTHORS

       Maor Gottlieb <maorg@mellanox.com>