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 * @flags: flags for the sync_file 29 * @fence: fence with the fences in the sync_file 30 * @cb: fence callback information 31 * 32 * flags: 33 * POLL_ENABLED: whether userspace is currently poll()'ing or not 34 */ 35 struct sync_file { 36 struct file *file; 37 /** 38 * @user_name: 39 * 40 * Name of the sync file provided by userspace, for merged fences. 41 * Otherwise generated through driver callbacks (in which case the 42 * entire array is 0). 43 */ 44 char user_name[32]; 45 #ifdef CONFIG_DEBUG_FS 46 struct list_head sync_file_list; 47 #endif 48 49 wait_queue_head_t wq; 50 unsigned long flags; 51 52 struct dma_fence *fence; 53 struct dma_fence_cb cb; 54 }; 55 56 #define POLL_ENABLED 0 57 58 struct sync_file *sync_file_create(struct dma_fence *fence); 59 struct dma_fence *sync_file_get_fence(int fd); 60 char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len); 61 62 #endif /* _LINUX_SYNC_H */ 63