| Alistair Delva | a2e4f6d | 2020-04-27 08:11:53 -0700 | [diff] [blame] | 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 */ |