Movatterモバイル変換

mlx5dv_reg_dmabuf_mr(3) — Linux manual page

mlx5dv_reg_dmabuf_mr(3)mlx5dv_reg_dmabuf_mr(3)

NAME        top

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

SYNOPSIS        top

              #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        top

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

ARGUMENTS        top

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              asoffset 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 ofenum 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        top

       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        top

ibv_reg_dmabuf_mr(3),mlx5dv_get_data_direct_sysfs_path(3)

AUTHOR        top

       Yishai Hadas ⟨yishaih@nvidia.com⟩

COLOPHON        top

       This page is part of therdma-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       linux-rdma@vger.kernel.org.  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 isnot part of the original manual page), send a mail to       man-pages@man7.orgmlx5dv_reg_dmabuf_mr(3)

HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH.