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NAME | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | COLOPHON |
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mlx5dv_devx_cre...comp, get_async(3) mlx5dv_devx_cre...comp, get_async(3)
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)
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 the wr_id that was supplied upon the
asynchronous command is returned and the out_data includes the
data itself. The application must supply a large enough buffer to
match any command that was issued on the cmd_comp, its size is
given by the input cmd_resp_len parameter.
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.
Upon success mlx5dv_devx_create_cmd_comp will return a new struct
mlx5dv_devx_cmd_comp object, on error NULL will be returned and
errno will be set.
Upon success mlx5dv_devx_get_async_cmd_comp will return 0,
otherwise errno will be returned.
mlx5dv_open_device(3), mlx5dv_devx_obj_create(3)
#AUTHOR
Yishai Hadas ⟨yishaih@mellanox.com⟩
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
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
man-pages@man7.org
mlx5dv_devx_cre...comp, get_async(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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