1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /* 2 /*
3 * Userspace ABI for Counter character devices 3 * Userspace ABI for Counter character devices
4 * Copyright (C) 2020 William Breathitt Gray 4 * Copyright (C) 2020 William Breathitt Gray
5 */ 5 */
6 #ifndef _UAPI_COUNTER_H_ 6 #ifndef _UAPI_COUNTER_H_
7 #define _UAPI_COUNTER_H_ 7 #define _UAPI_COUNTER_H_
8 8
9 #include <linux/ioctl.h> 9 #include <linux/ioctl.h>
10 #include <linux/types.h> 10 #include <linux/types.h>
11 11
12 /* Component type definitions */ 12 /* Component type definitions */
13 enum counter_component_type { 13 enum counter_component_type {
14 COUNTER_COMPONENT_NONE, 14 COUNTER_COMPONENT_NONE,
15 COUNTER_COMPONENT_SIGNAL, 15 COUNTER_COMPONENT_SIGNAL,
16 COUNTER_COMPONENT_COUNT, 16 COUNTER_COMPONENT_COUNT,
17 COUNTER_COMPONENT_FUNCTION, 17 COUNTER_COMPONENT_FUNCTION,
18 COUNTER_COMPONENT_SYNAPSE_ACTION, 18 COUNTER_COMPONENT_SYNAPSE_ACTION,
19 COUNTER_COMPONENT_EXTENSION, 19 COUNTER_COMPONENT_EXTENSION,
20 }; 20 };
21 21
22 /* Component scope definitions */ 22 /* Component scope definitions */
23 enum counter_scope { 23 enum counter_scope {
24 COUNTER_SCOPE_DEVICE, 24 COUNTER_SCOPE_DEVICE,
25 COUNTER_SCOPE_SIGNAL, 25 COUNTER_SCOPE_SIGNAL,
26 COUNTER_SCOPE_COUNT, 26 COUNTER_SCOPE_COUNT,
27 }; 27 };
28 28
29 /** 29 /**
30 * struct counter_component - Counter componen 30 * struct counter_component - Counter component identification
31 * @type: component type (one of enum counter_ 31 * @type: component type (one of enum counter_component_type)
32 * @scope: component scope (one of enum counte 32 * @scope: component scope (one of enum counter_scope)
33 * @parent: parent ID (matching the ID suffix 33 * @parent: parent ID (matching the ID suffix of the respective parent sysfs
34 * path as described by the ABI docum 34 * path as described by the ABI documentation file
35 * Documentation/ABI/testing/sysfs-bu 35 * Documentation/ABI/testing/sysfs-bus-counter)
36 * @id: component ID (matching the ID provided 36 * @id: component ID (matching the ID provided by the respective *_component_id
37 * sysfs attribute of the desired compone 37 * sysfs attribute of the desired component)
38 * 38 *
39 * For example, if the Count 2 ceiling extensi 39 * For example, if the Count 2 ceiling extension of Counter device 4 is desired,
40 * set type equal to COUNTER_COMPONENT_EXTENSI 40 * set type equal to COUNTER_COMPONENT_EXTENSION, scope equal to
41 * COUNTER_SCOPE_COUNT, parent equal to 2, and !! 41 * COUNTER_COUNT_SCOPE, parent equal to 2, and id equal to the value provided by
42 * the respective /sys/bus/counter/devices/cou 42 * the respective /sys/bus/counter/devices/counter4/count2/ceiling_component_id
43 * sysfs attribute. 43 * sysfs attribute.
44 */ 44 */
45 struct counter_component { 45 struct counter_component {
46 __u8 type; 46 __u8 type;
47 __u8 scope; 47 __u8 scope;
48 __u8 parent; 48 __u8 parent;
49 __u8 id; 49 __u8 id;
50 }; 50 };
51 51
52 /* Event type definitions */ 52 /* Event type definitions */
53 enum counter_event_type { 53 enum counter_event_type {
54 /* Count value increased past ceiling 54 /* Count value increased past ceiling */
55 COUNTER_EVENT_OVERFLOW, 55 COUNTER_EVENT_OVERFLOW,
56 /* Count value decreased past floor */ 56 /* Count value decreased past floor */
57 COUNTER_EVENT_UNDERFLOW, 57 COUNTER_EVENT_UNDERFLOW,
58 /* Count value increased past ceiling, 58 /* Count value increased past ceiling, or decreased past floor */
59 COUNTER_EVENT_OVERFLOW_UNDERFLOW, 59 COUNTER_EVENT_OVERFLOW_UNDERFLOW,
60 /* Count value reached threshold */ 60 /* Count value reached threshold */
61 COUNTER_EVENT_THRESHOLD, 61 COUNTER_EVENT_THRESHOLD,
62 /* Index signal detected */ 62 /* Index signal detected */
63 COUNTER_EVENT_INDEX, 63 COUNTER_EVENT_INDEX,
64 /* State of counter is changed */ <<
65 COUNTER_EVENT_CHANGE_OF_STATE, <<
66 /* Count value captured */ <<
67 COUNTER_EVENT_CAPTURE, <<
68 }; 64 };
69 65
70 /** 66 /**
71 * struct counter_watch - Counter component wa 67 * struct counter_watch - Counter component watch configuration
72 * @component: component to watch when event t 68 * @component: component to watch when event triggers
73 * @event: event that triggers (one of enum co 69 * @event: event that triggers (one of enum counter_event_type)
74 * @channel: event channel (typically 0 unless 70 * @channel: event channel (typically 0 unless the device supports concurrent
75 * events of the same type) 71 * events of the same type)
76 */ 72 */
77 struct counter_watch { 73 struct counter_watch {
78 struct counter_component component; 74 struct counter_component component;
79 __u8 event; 75 __u8 event;
80 __u8 channel; 76 __u8 channel;
81 }; 77 };
82 78
83 /* 79 /*
84 * Queues a Counter watch for the specified ev 80 * Queues a Counter watch for the specified event.
85 * 81 *
86 * The queued watches will not be applied unti 82 * The queued watches will not be applied until COUNTER_ENABLE_EVENTS_IOCTL is
87 * called. 83 * called.
88 */ 84 */
89 #define COUNTER_ADD_WATCH_IOCTL _IOW(0x3E, 0x0 85 #define COUNTER_ADD_WATCH_IOCTL _IOW(0x3E, 0x00, struct counter_watch)
90 /* 86 /*
91 * Enables monitoring the events specified by 87 * Enables monitoring the events specified by the Counter watches that were
92 * queued by COUNTER_ADD_WATCH_IOCTL. 88 * queued by COUNTER_ADD_WATCH_IOCTL.
93 * 89 *
94 * If events are already enabled, the new set 90 * If events are already enabled, the new set of watches replaces the old one.
95 * Calling this ioctl also has the effect of c 91 * Calling this ioctl also has the effect of clearing the queue of watches added
96 * by COUNTER_ADD_WATCH_IOCTL. 92 * by COUNTER_ADD_WATCH_IOCTL.
97 */ 93 */
98 #define COUNTER_ENABLE_EVENTS_IOCTL _IO(0x3E, 94 #define COUNTER_ENABLE_EVENTS_IOCTL _IO(0x3E, 0x01)
99 /* 95 /*
100 * Stops monitoring the previously enabled eve 96 * Stops monitoring the previously enabled events.
101 */ 97 */
102 #define COUNTER_DISABLE_EVENTS_IOCTL _IO(0x3E, 98 #define COUNTER_DISABLE_EVENTS_IOCTL _IO(0x3E, 0x02)
103 99
104 /** 100 /**
105 * struct counter_event - Counter event data 101 * struct counter_event - Counter event data
106 * @timestamp: best estimate of time of event 102 * @timestamp: best estimate of time of event occurrence, in nanoseconds
107 * @value: component value 103 * @value: component value
108 * @watch: component watch configuration 104 * @watch: component watch configuration
109 * @status: return status (system error number 105 * @status: return status (system error number)
110 */ 106 */
111 struct counter_event { 107 struct counter_event {
112 __aligned_u64 timestamp; 108 __aligned_u64 timestamp;
113 __aligned_u64 value; 109 __aligned_u64 value;
114 struct counter_watch watch; 110 struct counter_watch watch;
115 __u8 status; 111 __u8 status;
116 }; 112 };
117 113
118 /* Count direction values */ 114 /* Count direction values */
119 enum counter_count_direction { 115 enum counter_count_direction {
120 COUNTER_COUNT_DIRECTION_FORWARD, 116 COUNTER_COUNT_DIRECTION_FORWARD,
121 COUNTER_COUNT_DIRECTION_BACKWARD, 117 COUNTER_COUNT_DIRECTION_BACKWARD,
122 }; 118 };
123 119
124 /* Count mode values */ 120 /* Count mode values */
125 enum counter_count_mode { 121 enum counter_count_mode {
126 COUNTER_COUNT_MODE_NORMAL, 122 COUNTER_COUNT_MODE_NORMAL,
127 COUNTER_COUNT_MODE_RANGE_LIMIT, 123 COUNTER_COUNT_MODE_RANGE_LIMIT,
128 COUNTER_COUNT_MODE_NON_RECYCLE, 124 COUNTER_COUNT_MODE_NON_RECYCLE,
129 COUNTER_COUNT_MODE_MODULO_N, 125 COUNTER_COUNT_MODE_MODULO_N,
130 COUNTER_COUNT_MODE_INTERRUPT_ON_TERMIN <<
131 COUNTER_COUNT_MODE_HARDWARE_RETRIGGERA <<
132 COUNTER_COUNT_MODE_RATE_GENERATOR, <<
133 COUNTER_COUNT_MODE_SQUARE_WAVE_MODE, <<
134 COUNTER_COUNT_MODE_SOFTWARE_TRIGGERED_ <<
135 COUNTER_COUNT_MODE_HARDWARE_TRIGGERED_ <<
136 }; 126 };
137 127
138 /* Count function values */ 128 /* Count function values */
139 enum counter_function { 129 enum counter_function {
140 COUNTER_FUNCTION_INCREASE, 130 COUNTER_FUNCTION_INCREASE,
141 COUNTER_FUNCTION_DECREASE, 131 COUNTER_FUNCTION_DECREASE,
142 COUNTER_FUNCTION_PULSE_DIRECTION, 132 COUNTER_FUNCTION_PULSE_DIRECTION,
143 COUNTER_FUNCTION_QUADRATURE_X1_A, 133 COUNTER_FUNCTION_QUADRATURE_X1_A,
144 COUNTER_FUNCTION_QUADRATURE_X1_B, 134 COUNTER_FUNCTION_QUADRATURE_X1_B,
145 COUNTER_FUNCTION_QUADRATURE_X2_A, 135 COUNTER_FUNCTION_QUADRATURE_X2_A,
146 COUNTER_FUNCTION_QUADRATURE_X2_B, 136 COUNTER_FUNCTION_QUADRATURE_X2_B,
147 COUNTER_FUNCTION_QUADRATURE_X4, 137 COUNTER_FUNCTION_QUADRATURE_X4,
148 }; 138 };
149 139
150 /* Signal values */ 140 /* Signal values */
151 enum counter_signal_level { 141 enum counter_signal_level {
152 COUNTER_SIGNAL_LEVEL_LOW, 142 COUNTER_SIGNAL_LEVEL_LOW,
153 COUNTER_SIGNAL_LEVEL_HIGH, 143 COUNTER_SIGNAL_LEVEL_HIGH,
154 }; 144 };
155 145
156 /* Action mode values */ 146 /* Action mode values */
157 enum counter_synapse_action { 147 enum counter_synapse_action {
158 COUNTER_SYNAPSE_ACTION_NONE, 148 COUNTER_SYNAPSE_ACTION_NONE,
159 COUNTER_SYNAPSE_ACTION_RISING_EDGE, 149 COUNTER_SYNAPSE_ACTION_RISING_EDGE,
160 COUNTER_SYNAPSE_ACTION_FALLING_EDGE, 150 COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
161 COUNTER_SYNAPSE_ACTION_BOTH_EDGES, 151 COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
162 }; <<
163 <<
164 /* Signal polarity values */ <<
165 enum counter_signal_polarity { <<
166 COUNTER_SIGNAL_POLARITY_POSITIVE, <<
167 COUNTER_SIGNAL_POLARITY_NEGATIVE, <<
168 }; 152 };
169 153
170 #endif /* _UAPI_COUNTER_H_ */ 154 #endif /* _UAPI_COUNTER_H_ */
171 155
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.