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
);