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authorJason Gunthorpe <jgg@nvidia.com>2022-09-01 11:20:55 -0300
committerJason Gunthorpe <jgg@nvidia.com>2022-09-27 10:15:24 -0300
commit9af859c58d0f169ead0ed95204cdd891b0ee623a (patch)
treefb474014d3d9f71b3faf5dfc4b9ebd0f5806b92a /drivers/infiniband
parent015bda8abd3a6a77656e60b36d499c43a2c0f0a1 (diff)
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.c24
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,