/* * 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" /** * struct drm_syncobj - sync object. * * This structure defines a generic sync object which wraps a dma fence. */struct drm_syncobj {	/**	 * @refcount:	 *	 * Reference count of this object.	 */	struct kref refcount;	/**	 * @fence:	 * NULL or a pointer to the fence bound to this object.	 */	struct dma_fence *fence;	/**	 * @file:	 * a file backing for this syncobj.	 */	struct file *file;}; void drm_syncobj_free(struct kref *kref); /** * drm_syncobj_get - acquire a syncobj reference * @obj: sync object * * This acquires additional reference to @obj. It is illegal to call this * without already holding a reference. No locks required. */static inline voiddrm_syncobj_get(struct drm_syncobj *obj){	kref_get(&obj->refcount);} /** * drm_syncobj_put - release a reference to a sync object. * @obj: sync object. */static inline voiddrm_syncobj_put(struct drm_syncobj *obj){	kref_put(&obj->refcount, drm_syncobj_free);} struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,				     u32 handle);void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,			       struct dma_fence *fence);int drm_syncobj_fence_get(struct drm_file *file_private,			  u32 handle,			  struct dma_fence **fence);void drm_syncobj_free(struct kref *kref); #endif