diff options
| author | Gal Pressman <galpress@amazon.com> | 2021-10-12 15:09:02 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-10-28 08:58:26 -0300 |
| commit | 1e4df4a21c5ac722df1099eee30cad9246c889b5 (patch) | |
| tree | f0b3af65c7ea5416f698aca4b7d827cbd14bd267 /include/rdma | |
| parent | 5460601de590158b37619f8e18b678aa18da6345 (diff) | |
| download | lwn-1e4df4a21c5ac722df1099eee30cad9246c889b5.tar.gz lwn-1e4df4a21c5ac722df1099eee30cad9246c889b5.zip | |
RDMA/umem: Allow pinned dmabuf umem usage
Introduce ib_umem_dmabuf_get_pinned() which allows the driver to get a
dmabuf umem which is pinned and does not require move_notify callback
implementation.
The returned umem is pinned and DMA mapped like standard cpu umems, and is
released through ib_umem_release() (incl. unpinning and unmapping).
Link: https://lore.kernel.org/r/20211012120903.96933-3-galpress@amazon.com
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/ib_umem.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h index 5ae9dff74dac..92a673cd9b4f 100644 --- a/include/rdma/ib_umem.h +++ b/include/rdma/ib_umem.h @@ -38,6 +38,7 @@ struct ib_umem_dmabuf { unsigned long first_sg_offset; unsigned long last_sg_trim; void *private; + u8 pinned : 1; }; static inline struct ib_umem_dmabuf *to_ib_umem_dmabuf(struct ib_umem *umem) @@ -139,6 +140,10 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device, unsigned long offset, size_t size, int fd, int access, const struct dma_buf_attach_ops *ops); +struct ib_umem_dmabuf *ib_umem_dmabuf_get_pinned(struct ib_device *device, + unsigned long offset, + size_t size, int fd, + int access); int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf); void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf); void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf); @@ -179,6 +184,12 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device, { return ERR_PTR(-EOPNOTSUPP); } +static inline struct ib_umem_dmabuf * +ib_umem_dmabuf_get_pinned(struct ib_device *device, unsigned long offset, + size_t size, int fd, int access) +{ + return ERR_PTR(-EOPNOTSUPP); +} static inline int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf) { return -EOPNOTSUPP; |