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/*
* include/uapi/linux/nvdev_fence.h
*
* Tegra PVA/DLA fence support
*
* Copyright (c) 2018-2021, NVIDIA Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 LINUX_NVDEV_FENCE_H
#define LINUX_NVDEV_FENCE_H
#include <linux/types.h>
/* used for the recording with keventlib */
enum nvdev_fence_kind {
NVDEV_FENCE_KIND_PRE = 0,
NVDEV_FENCE_KIND_POST
};
/**
* struct nvdev_fence structure for passing fence information
*
* @type: Type of the fence (syncpoint, sync fd or semaphore)
* @type: fence action (wait or signal)
* @syncpoint_index: Syncpoint id
* @syncpoint_value: Value of syncpoint id
* @sync_fd: Linux sync FD handle
* @semaphore_handle: File handle to the semaphore memory buffer
* @semaphore_offset: Offset to the semaphore within the buffer
* @semaphore_value: Value of the semaphore
*/
struct nvdev_fence {
__u32 type;
#define NVDEV_FENCE_TYPE_SYNCPT 0
#define NVDEV_FENCE_TYPE_SYNC_FD 1
#define NVDEV_FENCE_TYPE_SEMAPHORE 2
#define NVDEV_FENCE_TYPE_SEMAPHORE_TS 3
__u32 action;
#define NVDEV_FENCE_WAIT 0
#define NVDEV_FENCE_SIGNAL 1
#define NVDEV_FENCE_SIGNAL_STRIDE 2
__u32 syncpoint_index;
__u32 syncpoint_value;
__u32 sync_fd;
__u32 semaphore_handle;
__u32 semaphore_offset;
__u32 semaphore_value;
};
#endif /* LINUX_NVDEV_FENCE_H */
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