2 * drivers/base/sw_sync.c
4 * Copyright (C) 2012 Google, Inc.
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/export.h>
20 #include <linux/file.h>
22 #include <linux/miscdevice.h>
23 #include <linux/syscalls.h>
24 #include <linux/uaccess.h>
28 struct fence *sw_sync_pt_create(struct sw_sync_timeline *obj, u32 value)
30 struct sw_sync_pt *pt;
32 pt = (struct sw_sync_pt *)
33 sync_pt_create(&obj->obj, sizeof(struct sw_sync_pt));
37 return (struct fence *)pt;
39 EXPORT_SYMBOL(sw_sync_pt_create);
41 static int sw_sync_fence_has_signaled(struct fence *fence)
43 struct sw_sync_pt *pt = (struct sw_sync_pt *)fence;
44 struct sw_sync_timeline *obj =
45 (struct sw_sync_timeline *)fence_parent(fence);
47 return (pt->value > obj->value) ? 0 : 1;
50 static void sw_sync_timeline_value_str(struct sync_timeline *sync_timeline,
53 struct sw_sync_timeline *timeline =
54 (struct sw_sync_timeline *)sync_timeline;
55 snprintf(str, size, "%d", timeline->value);
58 static void sw_sync_fence_value_str(struct fence *fence, char *str, int size)
60 struct sw_sync_pt *pt = (struct sw_sync_pt *)fence;
62 snprintf(str, size, "%d", pt->value);
65 static struct sync_timeline_ops sw_sync_timeline_ops = {
66 .driver_name = "sw_sync",
67 .has_signaled = sw_sync_fence_has_signaled,
68 .timeline_value_str = sw_sync_timeline_value_str,
69 .fence_value_str = sw_sync_fence_value_str,
72 struct sw_sync_timeline *sw_sync_timeline_create(const char *name)
74 struct sw_sync_timeline *obj = (struct sw_sync_timeline *)
75 sync_timeline_create(&sw_sync_timeline_ops,
76 sizeof(struct sw_sync_timeline),
81 EXPORT_SYMBOL(sw_sync_timeline_create);
83 void sw_sync_timeline_inc(struct sw_sync_timeline *obj, u32 inc)
87 sync_timeline_signal(&obj->obj);
89 EXPORT_SYMBOL(sw_sync_timeline_inc);