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RDMA/mlx5: Add support for dmabuf to devx umem
This is modeled after the similar EFA enablement in commit
66f4817b57
("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>
This commit is contained in:
parent
015bda8abd
commit
9af859c58d
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@ -2183,9 +2183,25 @@ static int devx_umem_get(struct mlx5_ib_dev *dev, struct ib_ucontext *ucontext,
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if (err)
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return err;
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obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access);
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if (IS_ERR(obj->umem))
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return PTR_ERR(obj->umem);
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if (uverbs_attr_is_valid(attrs, MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD)) {
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struct ib_umem_dmabuf *umem_dmabuf;
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int dmabuf_fd;
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err = uverbs_get_raw_fd(&dmabuf_fd, attrs,
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MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD);
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if (err)
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return -EFAULT;
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umem_dmabuf = ib_umem_dmabuf_get_pinned(
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&dev->ib_dev, addr, size, dmabuf_fd, access);
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if (IS_ERR(umem_dmabuf))
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return PTR_ERR(umem_dmabuf);
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obj->umem = &umem_dmabuf->umem;
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} else {
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obj->umem = ib_umem_get(&dev->ib_dev, addr, size, access);
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if (IS_ERR(obj->umem))
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return PTR_ERR(obj->umem);
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}
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return 0;
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}
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@ -2835,6 +2851,8 @@ DECLARE_UVERBS_NAMED_METHOD(
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UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
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UVERBS_ATTR_TYPE(u64),
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UA_MANDATORY),
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UVERBS_ATTR_RAW_FD(MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD,
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UA_OPTIONAL),
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UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
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enum ib_access_flags),
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UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
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@ -174,6 +174,7 @@ enum mlx5_ib_devx_umem_reg_attrs {
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MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
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MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
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MLX5_IB_ATTR_DEVX_UMEM_REG_PGSZ_BITMAP,
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MLX5_IB_ATTR_DEVX_UMEM_REG_DMABUF_FD,
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};
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enum mlx5_ib_devx_umem_dereg_attrs {
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