1 /* 2 * include/linux/sync_file.h 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_FILE_H 14 #define _LINUX_SYNC_FILE_H 15 16 #include <linux/types.h> 17 #include <linux/kref.h> 18 #include <linux/ktime.h> 19 #include <linux/list.h> 20 #include <linux/spinlock.h> 21 #include <linux/fence.h> 22 23 struct sync_file_cb { 24 struct fence_cb cb; 25 struct fence *fence; 26 struct sync_file *sync_file; 27 }; 28 29 /** 30 * struct sync_file - sync file to export to the userspace 31 * @file: file representing this fence 32 * @kref: reference count on fence. 33 * @name: name of sync_file. Useful for debugging 34 * @sync_file_list: membership in global file list 35 * @num_fences: number of sync_pts in the fence 36 * @wq: wait queue for fence signaling 37 * @status: 0: signaled, >0:active, <0: error 38 * @cbs: sync_pts callback information 39 */ 40 struct sync_file { 41 struct file *file; 42 struct kref kref; 43 char name[32]; 44 #ifdef CONFIG_DEBUG_FS 45 struct list_head sync_file_list; 46 #endif 47 int num_fences; 48 49 wait_queue_head_t wq; 50 atomic_t status; 51 52 struct sync_file_cb cbs[]; 53 }; 54 55 struct sync_file *sync_file_create(struct fence *fence); 56 57 #endif /* _LINUX_SYNC_H */ 58