ui/gfx/linux/dmabuf_uapi.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GFX_LINUX_DMABUF_UAPI_H_
#define UI_GFX_LINUX_DMABUF_UAPI_H_

#include <linux/version.h>

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
#include <linux/dma-buf.h>
#else
#include <linux/types.h>

struct dma_buf_sync {
  __u64 flags;
};

constexpr __u64 DMA_BUF_SYNC_READ = 1 << 0;
constexpr __u64 DMA_BUF_SYNC_WRITE = 2 << 0;
constexpr __u64 DMA_BUF_SYNC_RW = DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE;

constexpr __u64 DMA_BUF_SYNC_START = 0 << 2;
constexpr __u64 DMA_BUF_SYNC_END = 1 << 2;

constexpr char DMA_BUF_BASE = 'b';
constexpr unsigned long DMA_BUF_IOCTL_SYNC =
    _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync);
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 0, 0)
struct dma_buf_export_sync_file {
  __u32 flags;
  __s32 fd;
};

struct dma_buf_import_sync_file {
  __u32 flags;
  __s32 fd;
};

constexpr unsigned long DMA_BUF_IOCTL_EXPORT_SYNC_FILE =
    _IOWR(DMA_BUF_BASE, 2, struct dma_buf_export_sync_file);
constexpr unsigned long DMA_BUF_IOCTL_IMPORT_SYNC_FILE =
    _IOW(DMA_BUF_BASE, 3, struct dma_buf_import_sync_file);
#endif

#endif  // UI_GFX_LINUX_DMABUF_UAPI_H_