1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | /* |
3 | * DMABUF Heaps Userspace API |
4 | * |
5 | * Copyright (C) 2011 Google, Inc. |
6 | * Copyright (C) 2019 Linaro Ltd. |
7 | */ |
8 | #ifndef _UAPI_LINUX_DMABUF_POOL_H |
9 | #define _UAPI_LINUX_DMABUF_POOL_H |
10 | |
11 | #include <linux/ioctl.h> |
12 | #include <linux/types.h> |
13 | |
14 | /** |
15 | * DOC: DMABUF Heaps Userspace API |
16 | */ |
17 | |
18 | /* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */ |
19 | #define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE) |
20 | |
21 | /* Currently no heap flags */ |
22 | #define DMA_HEAP_VALID_HEAP_FLAGS (0) |
23 | |
24 | /** |
25 | * struct dma_heap_allocation_data - metadata passed from userspace for |
26 | * allocations |
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 |
32 | * |
33 | * Provided by userspace as an argument to the ioctl |
34 | */ |
35 | struct dma_heap_allocation_data { |
36 | __u64 len; |
37 | __u32 fd; |
38 | __u32 fd_flags; |
39 | __u64 heap_flags; |
40 | }; |
41 | |
42 | #define DMA_HEAP_IOC_MAGIC 'H' |
43 | |
44 | /** |
45 | * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool |
46 | * |
47 | * Takes a dma_heap_allocation_data struct and returns it with the fd field |
48 | * populated with the dmabuf handle of the allocation. |
49 | */ |
50 | #define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\ |
51 | struct dma_heap_allocation_data) |
52 | |
53 | #endif /* _UAPI_LINUX_DMABUF_POOL_H */ |
54 | |