1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _INPUT_COMPAT_H
3 #define _INPUT_COMPAT_H
4 
5 /*
6  * 32bit compatibility wrappers for the input subsystem.
7  *
8  * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
9  */
10 
11 #include <linux/compiler.h>
12 #include <linux/compat.h>
13 #include <linux/input.h>
14 
15 #ifdef CONFIG_COMPAT
16 
17 struct input_event_compat {
18 	compat_ulong_t sec;
19 	compat_ulong_t usec;
20 	__u16 type;
21 	__u16 code;
22 	__s32 value;
23 };
24 
25 struct ff_periodic_effect_compat {
26 	__u16 waveform;
27 	__u16 period;
28 	__s16 magnitude;
29 	__s16 offset;
30 	__u16 phase;
31 
32 	struct ff_envelope envelope;
33 
34 	__u32 custom_len;
35 	compat_uptr_t custom_data;
36 };
37 
38 struct ff_effect_compat {
39 	__u16 type;
40 	__s16 id;
41 	__u16 direction;
42 	struct ff_trigger trigger;
43 	struct ff_replay replay;
44 
45 	union {
46 		struct ff_constant_effect constant;
47 		struct ff_ramp_effect ramp;
48 		struct ff_periodic_effect_compat periodic;
49 		struct ff_condition_effect condition[2]; /* One for each axis */
50 		struct ff_rumble_effect rumble;
51 	} u;
52 };
53 
input_event_size(void)54 static inline size_t input_event_size(void)
55 {
56 	return (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) ?
57 		sizeof(struct input_event_compat) : sizeof(struct input_event);
58 }
59 
60 #else
61 
input_event_size(void)62 static inline size_t input_event_size(void)
63 {
64 	return sizeof(struct input_event);
65 }
66 
67 #endif /* CONFIG_COMPAT */
68 
69 int input_event_from_user(const char __user *buffer,
70 			 struct input_event *event);
71 
72 int input_event_to_user(char __user *buffer,
73 			const struct input_event *event);
74 
75 int input_ff_effect_from_user(const char __user *buffer, size_t size,
76 			      struct ff_effect *effect);
77 
78 #endif /* _INPUT_COMPAT_H */
79