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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137/* * 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 { /** * @refcount: Reference count of this object. */ struct kref refcount; /** * @fence: * NULL or a pointer to the fence bound to this object. * * This field should not be used directly. Use drm_syncobj_fence_get() * and drm_syncobj_replace_fence() instead. */ struct dma_fence __rcu *fence; /** * @cb_list: List of callbacks to call when the &fence gets replaced. */ struct list_head cb_list; /** * @ev_fd_list: List of registered eventfd. */ struct list_head ev_fd_list; /** * @lock: Protects &cb_list and &ev_fd_list, and write-locks &fence. */ spinlock_t lock; /** * @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 an 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);}
/** * 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 dma_fence *fence;
rcu_read_lock(); fence = dma_fence_get_rcu_safe(&syncobj->fence); rcu_read_unlock();
return fence;}
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