/*

   * Sync File validation framework and debug infomation

   *
   * Copyright (C) 2012 Google, Inc.
   *
   * 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.
   *
   */
  
  #ifndef _LINUX_SYNC_H
  #define _LINUX_SYNC_H

  #include <linux/list.h>

  #include <linux/rbtree.h>

  #include <linux/spinlock.h>

  #include <linux/dma-fence.h>

  #include <linux/sync_file.h>
  #include <uapi/linux/sync_file.h>

  /**
   * struct sync_timeline - sync object

   * @kref:		reference count on fence.

   * @name:		name of the sync_timeline. Useful for debugging

   * @lock:		lock protecting @pt_list and @value

   * @pt_tree:		rbtree of active (unsignaled/errored) sync_pts

   * @pt_list:		list of active (unsignaled/errored) sync_pts

   * @sync_timeline_list:	membership in global sync_timeline_list

   */
  struct sync_timeline {

  	struct kref		kref;

  	char			name[32];

  	/* protected by lock */

  	u64			context;
  	int			value;

  	struct rb_root		pt_tree;

  	struct list_head	pt_list;
  	spinlock_t		lock;

  
  	struct list_head	sync_timeline_list;

  };

  static inline struct sync_timeline *dma_fence_parent(struct dma_fence *fence)

  {

  	return container_of(fence->lock, struct sync_timeline, lock);

  }

  /**
   * struct sync_pt - sync_pt object
   * @base: base fence object

   * @link: link on the sync timeline's list

   * @node: node in the sync timeline's tree

   */
  struct sync_pt {

  	struct dma_fence base;

  	struct list_head link;

  	struct rb_node node;

  };

  extern const struct file_operations sw_sync_debugfs_fops;

  void sync_timeline_debug_add(struct sync_timeline *obj);
  void sync_timeline_debug_remove(struct sync_timeline *obj);

  void sync_file_debug_add(struct sync_file *fence);
  void sync_file_debug_remove(struct sync_file *fence);

  #endif /* _LINUX_SYNC_H */