text: #ifndef __NOUVEAU_FENCE_H__
  #define __NOUVEAU_FENCE_H__
  
  struct nouveau_drm;
  
  struct nouveau_fence {
  	struct list_head head;
  	struct kref kref;
  
  	struct nouveau_channel *channel;
  	unsigned long timeout;
  	u32 sequence;
  
  	void (*work)(void *priv, bool signalled);
  	void *priv;
  };
  
  int  nouveau_fence_new(struct nouveau_channel *, struct nouveau_fence **);
  struct nouveau_fence *
  nouveau_fence_ref(struct nouveau_fence *);
  void nouveau_fence_unref(struct nouveau_fence **);
  
  int  nouveau_fence_emit(struct nouveau_fence *, struct nouveau_channel *);
  bool nouveau_fence_done(struct nouveau_fence *);
  int  nouveau_fence_wait(struct nouveau_fence *, bool lazy, bool intr);
  int  nouveau_fence_sync(struct nouveau_fence *, struct nouveau_channel *);
  
  struct nouveau_fence_chan {
  	struct list_head pending;
  	struct list_head flip;
  
  	spinlock_t lock;
  	u32 sequence;
  };
  
  struct nouveau_fence_priv {
  	void (*dtor)(struct nouveau_drm *);
  	bool (*suspend)(struct nouveau_drm *);
  	void (*resume)(struct nouveau_drm *);
  	int  (*context_new)(struct nouveau_channel *);
  	void (*context_del)(struct nouveau_channel *);
  	int  (*emit)(struct nouveau_fence *);
  	int  (*sync)(struct nouveau_fence *, struct nouveau_channel *,
  		     struct nouveau_channel *);
  	u32  (*read)(struct nouveau_channel *);
  };
  
  #define nouveau_fence(drm) ((struct nouveau_fence_priv *)(drm)->fence)
  
  void nouveau_fence_context_new(struct nouveau_fence_chan *);
  void nouveau_fence_context_del(struct nouveau_fence_chan *);
  
  int nv04_fence_create(struct nouveau_drm *);
  int nv04_fence_mthd(struct nouveau_channel *, u32, u32, u32);
  
  int  nv10_fence_emit(struct nouveau_fence *);
  int  nv17_fence_sync(struct nouveau_fence *, struct nouveau_channel *,
  		     struct nouveau_channel *);
  u32  nv10_fence_read(struct nouveau_channel *);
  void nv10_fence_context_del(struct nouveau_channel *);
  void nv10_fence_destroy(struct nouveau_drm *);
  int  nv10_fence_create(struct nouveau_drm *);
  void nv17_fence_resume(struct nouveau_drm *drm);
  
  int nv50_fence_create(struct nouveau_drm *);
  int nv84_fence_create(struct nouveau_drm *);
  int nvc0_fence_create(struct nouveau_drm *);
  u64 nvc0_fence_crtc(struct nouveau_channel *, int crtc);
  
  int nouveau_flip_complete(void *chan);
  
  #endif
  