1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * Framework for buffer objects that can be shared across devices/subsystems.
4 *
5 * Copyright(C) 2015 Intel Ltd
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #ifndef _DMA_BUF_UAPI_H_
21 #define _DMA_BUF_UAPI_H_
22
23 #include <linux/types.h>
24
25 /* begin/end dma-buf functions used for userspace mmap. */
26 struct dma_buf_sync {
27 __u64 flags;
28 };
29
30 #define DMA_BUF_SYNC_READ (1 << 0)
31 #define DMA_BUF_SYNC_WRITE (2 << 0)
32 #define DMA_BUF_SYNC_RW (DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE)
33 #define DMA_BUF_SYNC_START (0 << 2)
34 #define DMA_BUF_SYNC_END (1 << 2)
35 #define DMA_BUF_SYNC_VALID_FLAGS_MASK \
36 (DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END)
37
38 #define DMA_BUF_NAME_LEN 32
39
40 #define DMA_BUF_BASE 'b'
41 #define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync)
42
43 /* 32/64bitness of this uapi was botched in android, there's no difference
44 * between them in actual uapi, they're just different numbers.
45 */
46 #define DMA_BUF_SET_NAME _IOW(DMA_BUF_BASE, 1, const char *)
47 #define DMA_BUF_SET_NAME_A _IOW(DMA_BUF_BASE, 1, u32)
48 #define DMA_BUF_SET_NAME_B _IOW(DMA_BUF_BASE, 1, u64)
49
50 #endif