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.

              MLX5DV_REG_DMABUF_ACCESS_DATA_DIRECT  if  set,  this  MR  will be accessed through the Data Direct
              engine bonded with that RDMA device.

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

                                                                                         mlx5dv_reg_dmabuf_mr(3)