42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
||
|
|
/*
|
||
|
|
* Framework for buffer objects that can be shared across devices/subsystems.
|
||
|
|
*
|
||
|
|
* Copyright(C) 2015 Intel Ltd
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License version 2 as published by
|
||
|
|
* the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||
|
|
* more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along with
|
||
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _DMA_BUF_UAPI_H_
|
||
|
|
#define _DMA_BUF_UAPI_H_
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
/* begin/end dma-buf functions used for userspace mmap. */
|
||
|
|
struct dma_buf_sync {
|
||
|
|
__u64 flags;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define DMA_BUF_SYNC_READ (1 << 0)
|
||
|
|
#define DMA_BUF_SYNC_WRITE (2 << 0)
|
||
|
|
#define DMA_BUF_SYNC_RW (DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE)
|
||
|
|
#define DMA_BUF_SYNC_START (0 << 2)
|
||
|
|
#define DMA_BUF_SYNC_END (1 << 2)
|
||
|
|
#define DMA_BUF_SYNC_VALID_FLAGS_MASK \
|
||
|
|
(DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END)
|
||
|
|
|
||
|
|
#define DMA_BUF_BASE 'b'
|
||
|
|
#define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync)
|
||
|
|
|
||
|
|
#endif
|