| Christopher Ferris | 2598113 | 2017-11-14 16:53:49 -0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| Christopher Ferris | ccfaccd | 2016-08-24 12:11:31 -0700 | [diff] [blame] | 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_BASE 'b' |
| 39 | #define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync) |
| 40 | |
| 41 | #endif |