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/*
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* Sync File validation framework and debug infomation
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*
* 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>
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# include <linux/rbtree.h>
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# include <linux/spinlock.h>
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# include <linux/dma-fence.h>
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# include <linux/sync_file.h>
# include <uapi/linux/sync_file.h>
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/**
* struct sync_timeline - sync object
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* @ kref : reference count on fence .
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* @ name : name of the sync_timeline . Useful for debugging
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* @ lock : lock protecting @ pt_list and @ value
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* @ pt_tree : rbtree of active ( unsignaled / errored ) sync_pts
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* @ pt_list : list of active ( unsignaled / errored ) sync_pts
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* @ sync_timeline_list : membership in global sync_timeline_list
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*/
struct sync_timeline {
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struct kref kref ;
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char name [ 32 ] ;
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/* protected by lock */
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u64 context ;
int value ;
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struct rb_root pt_tree ;
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struct list_head pt_list ;
spinlock_t lock ;
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struct list_head sync_timeline_list ;
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} ;
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static inline struct sync_timeline * dma_fence_parent ( struct dma_fence * fence )
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{
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return container_of ( fence - > lock , struct sync_timeline , lock ) ;
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}
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/**
* struct sync_pt - sync_pt object
* @ base : base fence object
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* @ link : link on the sync timeline ' s list
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* @ node : node in the sync timeline ' s tree
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* @ deadline : the earliest fence deadline hint
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*/
struct sync_pt {
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struct dma_fence base ;
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struct list_head link ;
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struct rb_node node ;
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ktime_t deadline ;
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} ;
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extern const struct file_operations sw_sync_debugfs_fops ;
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void sync_timeline_debug_add ( struct sync_timeline * obj ) ;
void sync_timeline_debug_remove ( struct sync_timeline * obj ) ;
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void sync_file_debug_add ( struct sync_file * fence ) ;
void sync_file_debug_remove ( struct sync_file * fence ) ;
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# endif /* _LINUX_SYNC_H */