include/linux/sync_file.h

   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 */