mlx5dv_alloc_var / mlx5dv_free_var - Online Linux Manual PageSection : 3
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NAMEmlx5dv_alloc_var - Allocates a VAR mlx5dv_free_var - Frees a VAR
SYNOPSIS
#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);
DESCRIPTIONCreate / 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.
ARGUMENTScontext 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.
RETURN VALUEUpon success mlx5dv_alloc_var returns a pointer to the created VAR ,on error NULL will be returned and errno will be set.
SEE ALSOmlx5dv_open_device, mlx5dv_devx_obj_create
AUTHORYishai Hadas <yishaih@mellanox.com> 0
Johanes Gumabo
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