1/* 2 * Sync File validation framework and debug infomation 3 * 4 * Copyright (C) 2012 Google, Inc. 5 * 6 * This program is distributed in the hope that it will be useful, 7 * but WITHOUT ANY WARRANTY; without even the implied warranty of 8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9 * GNU General Public License for more details. 10 * 11 */ 12 13#ifndef _LINUX_SYNC_H 14#define _LINUX_SYNC_H 15 16#include <linux/list.h> 17#include <linux/rbtree.h> 18#include <linux/spinlock.h> 19#include <linux/dma-fence.h> 20 21#include <linux/sync_file.h> 22#include <uapi/linux/sync_file.h> 23 24/** 25 * struct sync_timeline - sync object 26 * @kref: reference count on fence. 27 * @name: name of the sync_timeline. Useful for debugging 28 * @lock: lock protecting @pt_list and @value 29 * @pt_tree: rbtree of active (unsignaled/errored) sync_pts 30 * @pt_list: list of active (unsignaled/errored) sync_pts 31 * @sync_timeline_list: membership in global sync_timeline_list 32 */ 33struct sync_timeline { 34 struct kref kref; 35 char name[32]; 36 37 /* protected by lock */ 38 u64 context; 39 int value; 40 41 struct rb_root pt_tree; 42 struct list_head pt_list; 43 spinlock_t lock; 44 45 struct list_head sync_timeline_list; 46}; 47 48static inline struct sync_timeline *dma_fence_parent(struct dma_fence *fence) 49{ 50 return container_of(fence->lock, struct sync_timeline, lock); 51} 52 53/** 54 * struct sync_pt - sync_pt object 55 * @base: base fence object 56 * @link: link on the sync timeline's list 57 * @node: node in the sync timeline's tree 58 */ 59struct sync_pt { 60 struct dma_fence base; 61 struct list_head link; 62 struct rb_node node; 63}; 64 65extern const struct file_operations sw_sync_debugfs_fops; 66 67void sync_timeline_debug_add(struct sync_timeline *obj); 68void sync_timeline_debug_remove(struct sync_timeline *obj); 69void sync_file_debug_add(struct sync_file *fence); 70void sync_file_debug_remove(struct sync_file *fence); 71 72#endif /* _LINUX_SYNC_H */ 73