drm_syncobj.h | Explore in Territory

/*
 * Copyright © 2017 Red Hat
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *
 */
#ifndef __DRM_SYNCOBJ_H__
#define __DRM_SYNCOBJ_H__

#include <linux/dma-fence.h>
#include <linux/dma-fence-chain.h>

struct drm_file;

/**
 * struct drm_syncobj - sync object.
 *
 * This structure defines a generic sync object which wraps a &dma_fence.
 */
struct drm_syncobj { … };

void drm_syncobj_free(struct kref *kref);

/**
 * drm_syncobj_get - acquire a syncobj reference
 * @obj: sync object
 *
 * This acquires an additional reference to @obj. It is illegal to call this
 * without already holding a reference. No locks required.
 */
static inline void
drm_syncobj_get(struct drm_syncobj *obj)
{ … }

/**
 * drm_syncobj_put - release a reference to a sync object.
 * @obj: sync object.
 */
static inline void
drm_syncobj_put(struct drm_syncobj *obj)
{ … }

/**
 * drm_syncobj_fence_get - get a reference to a fence in a sync object
 * @syncobj: sync object.
 *
 * This acquires additional reference to &drm_syncobj.fence contained in @obj,
 * if not NULL. It is illegal to call this without already holding a reference.
 * No locks required.
 *
 * Returns:
 * Either the fence of @obj or NULL if there's none.
 */
static inline struct dma_fence *
drm_syncobj_fence_get(struct drm_syncobj *syncobj)
{ … }

struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
				     u32 handle);
void drm_syncobj_add_point(struct drm_syncobj *syncobj,
			   struct dma_fence_chain *chain,
			   struct dma_fence *fence,
			   uint64_t point);
void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
			       struct dma_fence *fence);
int drm_syncobj_find_fence(struct drm_file *file_private,
			   u32 handle, u64 point, u64 flags,
			   struct dma_fence **fence);
void drm_syncobj_free(struct kref *kref);
int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
		       struct dma_fence *fence);
int drm_syncobj_get_handle(struct drm_file *file_private,
			   struct drm_syncobj *syncobj, u32 *handle);
int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd);

#endif
linux/include/drm/drm_syncobj.h
