This is a Linux kernel mode driver that enables direct P2P communication between the memory of an Intel GPU card that supports the DMA-Buf framework and an HCA device that supports the PeerDirect interface from Mellanox.
It provides two interfaces:
-
As a Peer-Memory client: Peer-Memory is a Mellanox OFED (MOFED) specific kernel API that allows the owner of a memory allocation to claim the ownership and provide virtual address to DMA address translation for the RDMA drivers. The dmabuf_peer_mem KMD registers itself with MOFED as a Peer-Memory client.
-
As a dma-buf memory registry. The registry is a database of user supplied information of DMA-buf based memory allocations, including the virtuall address range and the file descriptor. The registry is accessed via ioctl interface over a character device (
/dev/dmabuf_reg).
This driver is part of a collection of kernel-mode drivers that enable support for Intel graphics. The main graphics driver listed below must be installed for the driver to work properly:
- Intel® Graphics Driver Backports for Linux - The main graphics driver (includes a compatible DRM subsystem and dmabuf if necessary)
| OSV | Branch | installation instructions |
|---|---|---|
| SUSE® Linux® Enterprise Server 15SP4 | suse/main | Readme |