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| author | Yishai Hadas <yishaih@nvidia.com> | 2026-02-01 16:34:06 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2026-02-08 23:50:41 -0500 |
| commit | d6c58f4eb3d00a695f5a610ea780cad322ec714e (patch) | |
| tree | 46fae564630e8c006f49371dc84b3cd10bfcd1ca /kernel | |
| parent | 0ac6f4056c4a257f4b230b910e3e6fee6c6fc9b9 (diff) | |
RDMA/mlx5: Implement DMABUF export ops
Enable p2pdma on the mlx5 PCI device to allow DMABUF-based peer-to-peer
DMA mappings.
Add implementation of the mmap_get_pfns and pgoff_to_mmap_entry device
operations required for DMABUF support in the mlx5 RDMA driver.
The pgoff_to_mmap_entry operation converts a page offset to the
corresponding rdma_user_mmap_entry by extracting the command and index
from the offset and looking it up in the ucontext's mmap_xa.
The mmap_get_pfns operation retrieves the physical address and length
from the mmap entry and obtains the p2pdma provider for the underlying
PCI device, which is needed for peer-to-peer DMA operations with
DMABUFs.
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Edward Srouji <edwards@nvidia.com>
Link: https://patch.msgid.link/20260201-dmabuf-export-v3-3-da238b614fe3@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions