1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
3 * DMABUF Heaps Userspace API
5 * Copyright (C) 2011 Google, Inc.
6 * Copyright (C) 2019 Linaro Ltd.
8 #ifndef _UAPI_LINUX_DMABUF_POOL_H
9 #define _UAPI_LINUX_DMABUF_POOL_H
11 #include <linux/ioctl.h>
12 #include <linux/types.h>
15 * DOC: DMABUF Heaps Userspace API
18 /* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */
19 #define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE)
21 /* Currently no heap flags */
22 #define DMA_HEAP_VALID_HEAP_FLAGS (0)
25 * struct dma_heap_allocation_data - metadata passed from userspace for
27 * @len: size of the allocation
28 * @fd: will be populated with a fd which provides the
29 * handle to the allocated dma-buf
30 * @fd_flags: file descriptor flags used when allocating
31 * @heap_flags: flags passed to heap
33 * Provided by userspace as an argument to the ioctl
35 struct dma_heap_allocation_data {
42 #define DMA_HEAP_IOC_MAGIC 'H'
45 * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool
47 * Takes a dma_heap_allocation_data struct and returns it with the fd field
48 * populated with the dmabuf handle of the allocation.
50 #define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\
51 struct dma_heap_allocation_data)
53 #endif /* _UAPI_LINUX_DMABUF_POOL_H */