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mlx5dv_create_cq(3) — Linux manual page

mlx5dv_create_cq(3)      mlx5 Programmer’s Manualmlx5dv_create_cq(3)

NAME        top

       mlx5dv_create_cq - creates a completion queue (CQ)

SYNOPSIS        top

              #include <infiniband/mlx5dv.h>              struct ibv_cq_ex *mlx5dv_create_cq(struct ibv_context *context,                                 struct ibv_cq_init_attr_ex *cq_attr,                                 struct mlx5dv_cq_init_attr *mlx5_cq_attr);

DESCRIPTION        top

mlx5dv_create_cq()creates a completion queue (CQ) with specific       driver properties.

ARGUMENTS        top

       Please seeibv_create_cq_ex(3)man page forcontextandcq_attrmlx5_cq_attr              struct mlx5dv_cq_init_attr {                  uint64_t comp_mask;                  uint8_t  cqe_comp_res_format;                  uint32_t flags;                  uint16_t cqe_size;              };comp_mask              Bitmask specifying what fields in the structure are valid:              MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE enables creating a              CQ in a mode that few CQEs may be compressed into a single              CQE, valid values incqe_comp_res_format              MLX5DV_CQ_INIT_ATTR_MASK_FLAGS valid values inflags              MLX5DV_CQ_INIT_ATTR_MASK_CQE_SIZE valid values incqe_sizecqe_comp_res_format              A bitwise OR of the various CQE response formats of the              responder side:              MLX5DV_CQE_RES_FORMAT_HASH CQE compression with hash              MLX5DV_CQE_RES_FORMAT_CSUM CQE compression with RX checksum              MLX5DV_CQE_RES_FORMAT_CSUM_STRIDX CQE compression with              stride indexflags  A bitwise OR of the various values described below:              MLX5DV_CQ_INIT_ATTR_FLAGS_CQE_PAD create a padded 128B CQEcqe_size              configure the CQE size to be 64 or 128 bytes other values              will fail mlx5dv_create_cq.

RETURN VALUE        top

mlx5dv_create_cq()returns a pointer to the created CQ, or NULL if       the request fails and errno will be set.

SEE ALSO        top

ibv_create_cq_ex(3),

AUTHOR        top

       Yonatan Cohen ⟨yonatanc@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.orgmlx5                             2018-9-1mlx5dv_create_cq(3)

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