mlx4dv_query_device(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | AUTHORS | COLOPHON

MLX4DV_QUERY_DEVICE(3)  Library Functions Manual  MLX4DV_QUERY_DEVICE(3)

NAME         top

       mlx4dv_query_device - Query device capabilities specific to mlx4

SYNOPSIS         top

       #include <infiniband/mlx4dv.h>

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

DESCRIPTION         top

       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         top

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

NOTES         top

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

SEE ALSO         top

       mlx4dv(7), ibv_query_device(3)

AUTHORS         top

       Maor Gottlieb <[email protected]>

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug
       report for this manual page, send it to
       [email protected].  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2024-06-14.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2024-06-10.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       [email protected]

1.0.0                          2017-06-27         MLX4DV_QUERY_DEVICE(3)