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| author | Jason Gunthorpe <jgg@nvidia.com> | 2022-09-01 16:20:55 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-09-27 15:15:24 +0200 |
| commit | 9af859c58d0f169ead0ed95204cdd891b0ee623a (patch) | |
| tree | fb474014d3d9f71b3faf5dfc4b9ebd0f5806b92a /drivers/infiniband | |
| parent | RDMA/core: Add UVERBS_ATTR_RAW_FD (diff) | |
| download | linux-9af859c58d0f169ead0ed95204cdd891b0ee623a.tar.xz linux-9af859c58d0f169ead0ed95204cdd891b0ee623a.zip | |
RDMA/mlx5: Add support for dmabuf to devx umem
This is modeled after the similar EFA enablement in commit
66f4817b5712 ("RDMA/efa: Add support for dmabuf memory regions").
Like EFA there is no support for revocation so we simply call the
ib_umem_dmabuf_get_pinned() to obtain a umem instead of the normal
ib_umem_get(). Everything else stays the same.
Link: https://lore.kernel.org/r/3-v1-bd147097458e+ede-umem_dmabuf_jgg@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/devx.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c index adefff89fb39..a41e8d582f5b 100644 --- a/drivers/infiniband/hw/mlx5/devx.c +++ b/drivers/infiniband/hw/mlx5/devx.c @@ -2183,9 +2183,25 @@ static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext, if (err) return err; - obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access); - if (IS_ERR(obj->umem)) - return PTR_ERR(obj->umem); + if (uverbs_attr_is_valid(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD)) { + struct ib_umem_dmabuf *umem_dmabuf; + int dmabuf_fd; + + err = uverbs_get_raw_fd(&dmabuf_fd, attrs, + MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD); + if (err) + return -EFAULT; + + umem_dmabuf = ib_umem_dmabuf_get_pinned( + &dev->ib_dev, addr, size, dmabuf_fd, access); + if (IS_ERR(umem_dmabuf)) + return PTR_ERR(umem_dmabuf); + obj->umem = &umem_dmabuf->umem; + } else { + obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access); + if (IS_ERR(obj->umem)) + return PTR_ERR(obj->umem); + } return 0; } @@ -2835,6 +2851,8 @@ DECLARE_UVERBS_NAMED_METHOD( UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN, UVERBS_ATTR_TYPE(u64), UA_MANDATORY), + UVERBS_ATTR_RAW_FD(MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD, + UA_OPTIONAL), UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS, enum ib_access_flags), UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP, |