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NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | AUTHOR | COLOPHON |
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mlx5dv_alloc_va...mlx5dv_free_var(3) mlx5dv_alloc_va...mlx5dv_free_var(3)
mlx5dv_alloc_var - Allocates a VAR
mlx5dv_free_var - Frees a VAR
#include <infiniband/mlx5dv.h>
struct mlx5dv_var *
mlx5dv_alloc_var(struct ibv_context *context, uint32_t flags);
void mlx5dv_free_var(struct mlx5dv_var *dv_var);
Create / free a VAR which can be used for some device commands
over the DEVX interface.
The DEVX API enables direct access from the user space area to the
mlx5 device driver, the VAR information is needed for few commands
related to Virtio.
context
RDMA device context to work on.
flags Allocation flags for the UAR.
dv_var
struct mlx5dv_var {
uint32_t page_id;
uint32_t length;
off_t mmap_off;
uint64_t comp_mask;
};
page_id
The device page id to be used.
length The mmap length parameter to be used for mapping a VA to
the allocated VAR entry.
mmap_off
The mmap offset parameter to be used for mapping a VA to
the allocated VAR entry.
Upon success mlx5dv_alloc_var returns a pointer to the created VAR
,on error NULL will be returned and errno will be set.
mlx5dv_open_device, mlx5dv_devx_obj_create
Yishai Hadas ⟨[email protected]⟩
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
[email protected]. 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
[email protected]
mlx5dv_alloc_va...mlx5dv_free_var(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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