summaryrefslogtreecommitdiffstats
blob: 94752158436ca89b0e9442b8aebba3c60436a65c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
/**
 * Copyright (C) ARM Limited 2013. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include "Hwmon.h"

#include "libsensors/sensors.h"

#include "Buffer.h"
#include "Counter.h"
#include "Logging.h"
#include "SessionData.h"

class HwmonCounter {
public:
	HwmonCounter(HwmonCounter *next, int key, const sensors_chip_name *chip, const sensors_feature *feature);
	~HwmonCounter();

	HwmonCounter *getNext() const { return next; }
	int getKey() const { return key; }
	bool isEnabled() const { return enabled; }
	const char *getName() const { return name; }
	const char *getLabel() const { return label; }
	const char *getTitle() const { return title; }
	bool isDuplicate() const { return duplicate; }
	const char *getDisplay() const { return display; }
	const char *getUnit() const { return unit; }
	int getModifier() const { return modifier; }

	void setEnabled(const bool enabled) {
		this->enabled = enabled;
		// canRead will clear enabled if the counter is not readable
		canRead();
	}

	double read();
	bool canRead();

private:
	void init(const sensors_chip_name *chip, const sensors_feature *feature);

	HwmonCounter *const next;
	const int key;
	int polled : 1,
		readable : 1,
		enabled : 1,
		monotonic: 1,
		duplicate : 1;

	const sensors_chip_name *chip;
	const sensors_feature *feature;

	char *name;
	char *label;
	const char *title;
	const char *display;
	const char *unit;
	int modifier;
	double previous_value;

	sensors_subfeature_type input;
};

HwmonCounter::HwmonCounter(HwmonCounter *next, int key, const sensors_chip_name *chip, const sensors_feature *feature) : next(next), key(key), polled(false), readable(false), enabled(false), duplicate(false), chip(chip), feature(feature) {

	int len = sensors_snprintf_chip_name(NULL, 0, chip) + 1;
	char *chip_name = new char[len];
	sensors_snprintf_chip_name(chip_name, len, chip);

	len = snprintf(NULL, 0, "hwmon_%s_%d", chip_name, feature->number) + 1;
	name = new char[len];
	len = snprintf(name, len, "hwmon_%s_%d", chip_name, feature->number);

	delete [] chip_name;

	label = sensors_get_label(chip, feature);

	switch (feature->type) {
	case SENSORS_FEATURE_IN:
		title = "Voltage";
		input = SENSORS_SUBFEATURE_IN_INPUT;
		display = "average";
		unit = "V";
		modifier = 1000;
		monotonic = false;
		break;
	case SENSORS_FEATURE_FAN:
		title = "Fan";
		input = SENSORS_SUBFEATURE_FAN_INPUT;
		display = "average";
		unit = "RPM";
		modifier = 1;
		monotonic = false;
		break;
	case SENSORS_FEATURE_TEMP:
		title = "Temperature";
		input = SENSORS_SUBFEATURE_TEMP_INPUT;
		display = "maximum";
		unit = "°C";
		modifier = 1000;
		monotonic = false;
		break;
	case SENSORS_FEATURE_POWER:
		title = "Power";
		input = SENSORS_SUBFEATURE_POWER_INPUT;
		display = "average";
		unit = "W";
		modifier = 1000000;
		monotonic = false;
		break;
	case SENSORS_FEATURE_ENERGY:
		title = "Energy";
		input = SENSORS_SUBFEATURE_ENERGY_INPUT;
		display = "accumulate";
		unit = "J";
		modifier = 1000000;
		monotonic = true;
		break;
	case SENSORS_FEATURE_CURR:
		title = "Current";
		input = SENSORS_SUBFEATURE_CURR_INPUT;
		display = "average";
		unit = "A";
		modifier = 1000;
		monotonic = false;
		break;
	case SENSORS_FEATURE_HUMIDITY:
		title = "Humidity";
		input = SENSORS_SUBFEATURE_HUMIDITY_INPUT;
		display = "average";
		unit = "%";
		modifier = 1000;
		monotonic = false;
		break;
	default:
		logg->logError(__FILE__, __LINE__, "Unsupported hwmon feature %i", feature->type);
		handleException();
	}

	for (HwmonCounter * counter = next; counter != NULL; counter = counter->getNext()) {
		if (strcmp(label, counter->getLabel()) == 0 && strcmp(title, counter->getTitle()) == 0) {
			duplicate = true;
			counter->duplicate = true;
			break;
		}
	}
}

HwmonCounter::~HwmonCounter() {
	free((void *)label);
	delete [] name;
}

double HwmonCounter::read() {
	double value;
	double result;
	const sensors_subfeature *subfeature;

	// Keep in sync with canRead
	subfeature = sensors_get_subfeature(chip, feature, input);
	if (!subfeature) {
		logg->logError(__FILE__, __LINE__, "No input value for hwmon sensor %s", label);
		handleException();
	}

	if (sensors_get_value(chip, subfeature->number, &value) != 0) {
		logg->logError(__FILE__, __LINE__, "Can't get input value for hwmon sensor %s", label);
		handleException();
	}

	result = (monotonic ? value - previous_value : value);
	previous_value = value;

	return result;
}

bool HwmonCounter::canRead() {
	if (!polled) {
		double value;
		const sensors_subfeature *subfeature;
		bool result = true;

		subfeature = sensors_get_subfeature(chip, feature, input);
		if (!subfeature) {
			result = false;
		} else {
			result = sensors_get_value(chip, subfeature->number, &value) == 0;
		}

		polled = true;
		readable = result;
	}

	enabled &= readable;

	return readable;
}

Hwmon::Hwmon() : counters(NULL) {
	int err = sensors_init(NULL);
	if (err) {
		logg->logMessage("Failed to initialize libsensors! (%d)", err);
		return;
	}
	sensors_sysfs_no_scaling = 1;

	int chip_nr = 0;
	const sensors_chip_name *chip;
	while ((chip = sensors_get_detected_chips(NULL, &chip_nr))) {
		int feature_nr = 0;
		const sensors_feature *feature;
		while ((feature = sensors_get_features(chip, &feature_nr))) {
			counters = new HwmonCounter(counters, getEventKey(), chip, feature);
		}
	}
}

Hwmon::~Hwmon() {
	while (counters != NULL) {
		HwmonCounter * counter = counters;
		counters = counter->getNext();
		delete counter;
	}
	sensors_cleanup();
}

HwmonCounter *Hwmon::findCounter(const Counter &counter) const {
	for (HwmonCounter * hwmonCounter = counters; hwmonCounter != NULL; hwmonCounter = hwmonCounter->getNext()) {
		if (hwmonCounter->canRead() && strcmp(hwmonCounter->getName(), counter.getType()) == 0) {
			return hwmonCounter;
		}
	}

	return NULL;
}

bool Hwmon::claimCounter(const Counter &counter) const {
	return findCounter(counter) != NULL;
}

bool Hwmon::countersEnabled() const {
	for (HwmonCounter * counter = counters; counter != NULL; counter = counter->getNext()) {
		if (counter->isEnabled()) {
			return true;
		}
	}
	return false;
}

void Hwmon::resetCounters() {
	for (HwmonCounter * counter = counters; counter != NULL; counter = counter->getNext()) {
		counter->setEnabled(false);
	}
}

void Hwmon::setupCounter(Counter &counter) {
	HwmonCounter *const hwmonCounter = findCounter(counter);
	if (hwmonCounter == NULL) {
		counter.setEnabled(false);
		return;
	}
	hwmonCounter->setEnabled(true);
	counter.setKey(hwmonCounter->getKey());
}

void Hwmon::writeCounters(mxml_node_t *root) const {
	for (HwmonCounter * counter = counters; counter != NULL; counter = counter->getNext()) {
		if (!counter->canRead()) {
			continue;
		}
		mxml_node_t *node = mxmlNewElement(root, "counter");
		mxmlElementSetAttr(node, "name", counter->getName());
	}
}

void Hwmon::writeEvents(mxml_node_t *root) const {
	root = mxmlNewElement(root, "category");
	mxmlElementSetAttr(root, "name", "hwmon");

	char buf[1024];
	for (HwmonCounter * counter = counters; counter != NULL; counter = counter->getNext()) {
		if (!counter->canRead()) {
			continue;
		}
		mxml_node_t *node = mxmlNewElement(root, "event");
		mxmlElementSetAttr(node, "counter", counter->getName());
		mxmlElementSetAttr(node, "title", counter->getTitle());
		if (counter->isDuplicate()) {
			mxmlElementSetAttrf(node, "name", "%s (0x%x)", counter->getLabel(), counter->getKey());
		} else {
			mxmlElementSetAttr(node, "name", counter->getLabel());
		}
		mxmlElementSetAttr(node, "display", counter->getDisplay());
		mxmlElementSetAttr(node, "units", counter->getUnit());
		if (counter->getModifier() != 1) {
			mxmlElementSetAttrf(node, "modifier", "%d", counter->getModifier());
		}
		if (strcmp(counter->getDisplay(), "average") == 0 || strcmp(counter->getDisplay(), "maximum") == 0) {
			mxmlElementSetAttr(node, "average_selection", "yes");
		}
		snprintf(buf, sizeof(buf), "libsensors %s sensor %s (%s)", counter->getTitle(), counter->getLabel(), counter->getName());
		mxmlElementSetAttr(node, "description", buf);
	}
}

void Hwmon::start() {
	for (HwmonCounter * counter = counters; counter != NULL; counter = counter->getNext()) {
		if (!counter->isEnabled()) {
			continue;
		}
		counter->read();
	}
}

void Hwmon::read(Buffer * const buffer) {
	for (HwmonCounter * counter = counters; counter != NULL; counter = counter->getNext()) {
		if (!counter->isEnabled()) {
			continue;
		}
		buffer->event(counter->getKey(), counter->read());
	}
}