include/uapi/linux/dma-buf.h

   1 /*
   2  * Framework for buffer objects that can be shared across devices/subsystems.
   3  *
   4  * Copyright(C) 2015 Intel Ltd
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef _DMA_BUF_UAPI_H_
  20 #define _DMA_BUF_UAPI_H_
  21
  22 #include <linux/types.h>
  23
  24 /* begin/end dma-buf functions used for userspace mmap. */
  25 struct dma_buf_sync {
  26         __u64 flags;
  27 };
  28
  29 #define DMA_BUF_SYNC_READ      (1 << 0)
  30 #define DMA_BUF_SYNC_WRITE     (2 << 0)
  31 #define DMA_BUF_SYNC_RW        (DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE)
  32 #define DMA_BUF_SYNC_START     (0 << 2)
  33 #define DMA_BUF_SYNC_END       (1 << 2)
  34 #define DMA_BUF_SYNC_VALID_FLAGS_MASK \
  35         (DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END)
  36
  37 #define DMA_BUF_BASE            'b'
  38 #define DMA_BUF_IOCTL_SYNC      _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync)
  39
  40 #endif