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/ktime.h> 18 #include <linux/list.h> 19 #include <linux/spinlock.h> 20 #include <linux/dma-fence.h> 21 #include <linux/dma-fence-array.h> 22 23 /** 24 * struct sync_file - sync file to export to the userspace 25 * @file: file representing this fence 26 * @sync_file_list: membership in global file list 27 * @wq: wait queue for fence signaling 28 * @fence: fence with the fences in the sync_file 29 * @cb: fence callback information 30 */ 31 struct sync_file { 32 struct file *file; 33 /** 34 * @user_name: 35 * 36 * Name of the sync file provided by userspace, for merged fences. 37 * Otherwise generated through driver callbacks (in which case the 38 * entire array is 0). 39 */ 40 char user_name[32]; 41 #ifdef CONFIG_DEBUG_FS 42 struct list_head sync_file_list; 43 #endif 44 45 wait_queue_head_t wq; 46 unsigned long flags; 47 48 struct dma_fence *fence; 49 struct dma_fence_cb cb; 50 }; 51 52 #define POLL_ENABLED 0 53 54 struct sync_file *sync_file_create(struct dma_fence *fence); 55 struct dma_fence *sync_file_get_fence(int fd); 56 char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len); 57 58 #endif /* _LINUX_SYNC_H */ 59