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mlx5dv_devx_query_eqn(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | COLOPHON 

mlx5dv_devx_query_eqn(3)                         mlx5dv_devx_query_eqn(3)

NAME         top

       mlx5dv_devx_query_eqn - Query EQN for a given vector id.

SYNOPSIS         top

              #include <infiniband/mlx5dv.h>

              int mlx5dv_devx_query_eqn(struct ibv_context *context, uint32_t vector,
                                        uint32_t *eqn);

DESCRIPTION         top

       Query EQN for a given input vector, the EQN is needed for other
       device commands over the DEVX interface.

       The DEVX API enables direct access from the user space area to the
       mlx5 device driver, the EQN information is needed for few commands
       such as CQ creation.

ARGUMENTS         top

       context
              RDMA device context to work on.

       vector Completion vector number.

       eqn    The device EQ number which relates to the given input
              vector.

RETURN VALUE         top

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

SEE ALSO         top

       mlx5dv_open_device, mlx5dv_devx_obj_create

       #AUTHOR

       Yishai Hadas ⟨yishaih@mellanox.com⟩

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
       linux-rdma@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2025-08-11.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2025-08-04.)  If you discover any rendering
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       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
       man-pages@man7.org

                                                 mlx5dv_devx_query_eqn(3)

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