Introduce a new file callback that allows creating long-term dma mapping. All necessary information together with a dmabuf will be passed in the second argument of type struct io_dmabuf_token, which will be defined in following patches.
Signed-off-by: Pavel Begunkov asml.silence@gmail.com --- include/linux/fs.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/fs.h b/include/linux/fs.h index b5b01bb22d12..c5558aab4628 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1920,6 +1920,7 @@ struct dir_context {
struct io_uring_cmd; struct offset_ctx; +struct io_dmabuf_token;
typedef unsigned int __bitwise fop_flags_t;
@@ -1967,6 +1968,7 @@ struct file_operations { int (*uring_cmd_iopoll)(struct io_uring_cmd *, struct io_comp_batch *, unsigned int poll_flags); int (*mmap_prepare)(struct vm_area_desc *); + int (*create_dmabuf_token)(struct file *, struct io_dmabuf_token *); } __randomize_layout;
/* Supports async buffered reads */