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mlx5dv_devx_destroy_cmd_comp(3) — Linux manual page

mlx5dv_devx_cre...comp, get_async(3)mlx5dv_devx_cre...comp, get_async(3)

NAME        top

       mlx5dv_devx_create_cmd_comp - Create a command completion to be       used for DEVX asynchronous commands.       mlx5dv_devx_destroy_cmd_comp - Destroy a devx command completion.       mlx5dv_devx_get_async_cmd_comp - Get an asynchronous command       completion.  # SYNOPSIS              #include <infiniband/mlx5dv.h>              struct mlx5dv_devx_cmd_comp {                  int fd;              };              struct mlx5dv_devx_cmd_comp *              mlx5dv_devx_create_cmd_comp(struct ibv_context *context)              void mlx5dv_devx_destroy_cmd_comp(struct mlx5dv_devx_cmd_comp *cmd_comp)              struct mlx5dv_devx_async_cmd_hdr {                  uint64_t    wr_id;                  uint8_t     out_data[];              };              int mlx5dv_devx_get_async_cmd_comp(struct mlx5dv_devx_cmd_comp *cmd_comp,                                 struct mlx5dv_devx_async_cmd_hdr *cmd_resp,                                 size_t cmd_resp_len)

DESCRIPTION        top

       Create or destroy a command completion to be used for DEVX       asynchronous commands.       The create verb exposes an mlx5dv_devx_cmd_comp object that can be       used as part of asynchronous DEVX commands.  This lets an       application run asynchronously without blocking and once the       response is ready read it from this object.       The response can be read by the mlx5dv_devx_get_async_cmd_comp()       API, upon response thewr_id that was supplied upon the       asynchronous command is returned and theout_data includes the       data itself.  The application must supply a large enough buffer to       match any command that was issued on thecmd_comp, its size is       given by the inputcmd_resp_len parameter.

ARGUMENTS        top

context              RDMA device context to create the action on.cmd_comp              The command completion object.cmd_resp              The output data from the asynchronous command.cmd_resp_len              The output buffer size to hold the response.

RETURN VALUE        top

       Upon successmlx5dv_devx_create_cmd_comp will return a newstructmlx5dv_devx_cmd_comp object, on error NULL will be returned and       errno will be set.       Upon successmlx5dv_devx_get_async_cmd_comp will return 0,       otherwise errno will be returned.

SEE ALSO        top

mlx5dv_open_device(3),mlx5dv_devx_obj_create(3)       #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_cre...comp, get_async(3)

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