/*
* 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
* @ deadline : the earliest fence deadline hint
*/
struct sync_pt {
struct dma_fence base;
struct list_head link;
struct rb_node node;
ktime_t deadline;
};
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);
#endif /* _LINUX_SYNC_H */
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