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mlx5dv_devx_cq_query(3) — Linux manual page

mlx5dv_devx_qp..._modify / query(3)mlx5dv_devx_qp..._modify / query(3)

NAME        top

       mlx5dv_devx_qp_modify - Modifies a verbs QP via DEVX       mlx5dv_devx_qp_query - Queries a verbs QP via DEVX       mlx5dv_devx_cq_modify - Modifies a verbs CQ via DEVX       mlx5dv_devx_cq_query - Queries a verbs CQ via DEVX       mlx5dv_devx_srq_modify - Modifies a verbs SRQ via DEVX       mlx5dv_devx_srq_query - Queries a verbs SRQ via DEVX       mlx5dv_devx_wq_modify - Modifies a verbs WQ via DEVX       mlx5dv_devx_wq_query - Queries a verbs WQ via DEVX       mlx5dv_devx_ind_tbl_modify - Modifies a verbs indirection table       via DEVX       mlx5dv_devx_ind_tbl_query - Queries a verbs indirection table via       DEVX

SYNOPSIS        top

              #include <infiniband/mlx5dv.h>              int mlx5dv_devx_qp_modify(struct ibv_qp *qp, const void *in, size_t inlen,                                        void *out, size_t outlen);              int mlx5dv_devx_qp_query(struct ibv_qp *qp, const void *in, size_t inlen,                                       void *out, size_t outlen);              int mlx5dv_devx_cq_modify(struct ibv_cq *cq, const void *in, size_t inlen,                                        void *out, size_t outlen);              int mlx5dv_devx_cq_query(struct ibv_cq *cq, const void *in, size_t inlen,                                       void *out, size_t outlen);              int mlx5dv_devx_srq_modify(struct ibv_srq *srq, const void *in, size_t inlen,                                         void *out, size_t outlen);              int mlx5dv_devx_srq_query(struct ibv_srq *srq, const void *in, size_t inlen,                                        void *out, size_t outlen);              int mlx5dv_devx_wq_modify(struct ibv_wq *wq, const void *in, size_t inlen,                                        void *out, size_t outlen);              int mlx5dv_devx_wq_query(struct ibv_wq *wq, const void *in, size_t inlen,                                       void *out, size_t outlen);              int mlx5dv_devx_ind_tbl_modify(struct ibv_rwq_ind_table *ind_tbl,                                             const void *in, size_t inlen,                                             void *out, size_t outlen);              int mlx5dv_devx_ind_tbl_query(struct ibv_rwq_ind_table *ind_tbl,                                            const void *in, size_t inlen,                                            void *out, size_t outlen);

DESCRIPTION        top

       Modify / query a verb object over the DEVX interface.       The DEVX API enables direct access from the user space area to the       mlx5 device driver by using the KABI mechanism.  The main purpose       is to make the user space driver as independent as possible from       the kernel so that future device functionality and commands can be       activated with minimal to none kernel changes.       The above APIs enables modifying/querying a verb object via the       DEVX interface.  This enables interoperability between verbs and       DEVX.  As such an application can use the create method from verbs       (e.g. ibv_create_qp) and modify and query the created object via       DEVX (e.g. mlx5dv_devx_qp_modify).

ARGUMENTS        top

qp/cq/wq/srq/ind_tbl              The ibv_xxx object to issue the action on.in     A buffer which contains the command’s input data provided              in a device specification format.inlen  The size ofin buffer in bytes.out    A buffer which contains the command’s output data according              to the device specification format.outlen The size ofout buffer in bytes.

RETURN VALUE        top

       Upon success 0 is returned or the value of errno on a failure.       If the error value is EREMOTEIO, outbox.status outbox.syndrome       will contain the command failure details.

SEE ALSO        top

mlx5dv_open_device,mlx5dv_devx_obj_create       #AUTHOR       Yishai Hadas ⟨yishaih@mellanox.com⟩

COLOPHON        top

       This page is part of therdma-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       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 isnot part of the original manual page), send a mail to       man-pages@man7.orgmlx5dv_devx_qp..._modify / query(3)

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