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

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 enumibv_access_flags. mlx5_access A specific device access flags, it is either 0 or the below. MLX5DV_REG_DMABUF_ACCESS_DATA_DIRECT if set, this MR will be accessed through the Data Direct engine bonded with that RDMA device.

Yishai Hadas yishaih@nvidia.commlx5dv_reg_dmabuf_mr(3)

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.

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

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.

ibv_reg_dmabuf_mr(3), mlx5dv_get_data_direct_sysfs_path(3)

#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)