NAME¶

mlx5dv_reg_dmabuf_mr - Register a dma-buf based memory region (MR)

SYNOPSIS¶

#include <infiniband/mlx5dv.h>
struct ibv_mr *mlx5dv_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset,


                                    size_t length, uint64_t iova, int fd,


                                    int access, int mlx5_access)
    

DESCRIPTION¶

Register a dma-buf based memory region (MR), it follows the functionality of ibv_reg_dmabuf_mr() with the ability to supply specific mlx5 access flags.

ARGUMENTS¶

pd

The associated protection domain.

offset

The offset of the dma-buf where the MR starts.

length

The length of the MR.
    

iova

Specifies the virtual base address of the MR when accessed through a lkey or rkey. It must have the same page offset as offset and be aligned with the system page size.

fd

The file descriptor that the dma-buf is identified by.

access

The desired memory protection attributes; it is either 0 or the bitwise OR of one or more of enum ibv_access_flags.

mlx5_access

A specific device access flags, it is either 0 or the below.

RETURN VALUE¶

Upon success returns a pointer to the registered MR, or NULL if the request fails, in that case the value of errno indicates the failure reason.

SEE ALSO¶

ibv_reg_dmabuf_mr(3), mlx5dv_get_data_direct_sysfs_path(3)

AUTHOR¶

Yishai Hadas yishaih@nvidia.com