summaryrefslogtreecommitdiff
path: root/drivers/misc/habanalabs/hwmon.c
blob: a4319c6fabe65120b5e00fe76a711e1f2ab61db4 (plain)
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
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
// SPDX-License-Identifier: GPL-2.0

/*
 * Copyright 2016-2019 HabanaLabs, Ltd.
 * All Rights Reserved.
 */

#include "habanalabs.h"

#include <linux/pci.h>
#include <linux/hwmon.h>

#define SENSORS_PKT_TIMEOUT		1000000	/* 1s */
#define HWMON_NR_SENSOR_TYPES		(hwmon_pwm + 1)

int hl_build_hwmon_channel_info(struct hl_device *hdev,
				struct armcp_sensor *sensors_arr)
{
	u32 counts[HWMON_NR_SENSOR_TYPES] = {0};
	u32 *sensors_by_type[HWMON_NR_SENSOR_TYPES] = {NULL};
	u32 sensors_by_type_next_index[HWMON_NR_SENSOR_TYPES] = {0};
	struct hwmon_channel_info **channels_info;
	u32 num_sensors_for_type, num_active_sensor_types = 0,
			arr_size = 0, *curr_arr;
	enum hwmon_sensor_types type;
	int rc, i, j;

	for (i = 0 ; i < ARMCP_MAX_SENSORS ; i++) {
		type = __le32_to_cpu(sensors_arr[i].type);

		if ((type == 0) && (sensors_arr[i].flags == 0))
			break;

		if (type >= HWMON_NR_SENSOR_TYPES) {
			dev_err(hdev->dev,
				"Got wrong sensor type %d from device\n", type);
			return -EINVAL;
		}

		counts[type]++;
		arr_size++;
	}

	for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
		if (counts[i] == 0)
			continue;

		num_sensors_for_type = counts[i] + 1;
		curr_arr = kcalloc(num_sensors_for_type, sizeof(*curr_arr),
				GFP_KERNEL);
		if (!curr_arr) {
			rc = -ENOMEM;
			goto sensors_type_err;
		}

		num_active_sensor_types++;
		sensors_by_type[i] = curr_arr;
	}

	for (i = 0 ; i < arr_size ; i++) {
		type = __le32_to_cpu(sensors_arr[i].type);
		curr_arr = sensors_by_type[type];
		curr_arr[sensors_by_type_next_index[type]++] =
				__le32_to_cpu(sensors_arr[i].flags);
	}

	channels_info = kcalloc(num_active_sensor_types + 1,
			sizeof(*channels_info), GFP_KERNEL);
	if (!channels_info) {
		rc = -ENOMEM;
		goto channels_info_array_err;
	}

	for (i = 0 ; i < num_active_sensor_types ; i++) {
		channels_info[i] = kzalloc(sizeof(*channels_info[i]),
				GFP_KERNEL);
		if (!channels_info[i]) {
			rc = -ENOMEM;
			goto channel_info_err;
		}
	}

	for (i = 0, j = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++) {
		if (!sensors_by_type[i])
			continue;

		channels_info[j]->type = i;
		channels_info[j]->config = sensors_by_type[i];
		j++;
	}

	hdev->hl_chip_info->info =
			(const struct hwmon_channel_info **)channels_info;

	return 0;

channel_info_err:
	for (i = 0 ; i < num_active_sensor_types ; i++)
		if (channels_info[i]) {
			kfree(channels_info[i]->config);
			kfree(channels_info[i]);
		}
	kfree(channels_info);
channels_info_array_err:
sensors_type_err:
	for (i = 0 ; i < HWMON_NR_SENSOR_TYPES ; i++)
		kfree(sensors_by_type[i]);

	return rc;
}

static int hl_read(struct device *dev, enum hwmon_sensor_types type,
			u32 attr, int channel, long *val)
{
	struct hl_device *hdev = dev_get_drvdata(dev);

	if (hl_device_disabled_or_in_reset(hdev))
		return -ENODEV;

	switch (type) {
	case hwmon_temp:
		switch (attr) {
		case hwmon_temp_input:
		case hwmon_temp_max:
		case hwmon_temp_crit:
		case hwmon_temp_max_hyst:
		case hwmon_temp_crit_hyst:
			break;
		default:
			return -EINVAL;
		}

		*val = hl_get_temperature(hdev, channel, attr);
		break;
	case hwmon_in:
		switch (attr) {
		case hwmon_in_input:
		case hwmon_in_min:
		case hwmon_in_max:
			break;
		default:
			return -EINVAL;
		}

		*val = hl_get_voltage(hdev, channel, attr);
		break;
	case hwmon_curr:
		switch (attr) {
		case hwmon_curr_input:
		case hwmon_curr_min:
		case hwmon_curr_max:
			break;
		default:
			return -EINVAL;
		}

		*val = hl_get_current(hdev, channel, attr);
		break;
	case hwmon_fan:
		switch (attr) {
		case hwmon_fan_input:
		case hwmon_fan_min:
		case hwmon_fan_max:
			break;
		default:
			return -EINVAL;
		}
		*val = hl_get_fan_speed(hdev, channel, attr);
		break;
	case hwmon_pwm:
		switch (attr) {
		case hwmon_pwm_input:
		case hwmon_pwm_enable:
			break;
		default:
			return -EINVAL;
		}
		*val = hl_get_pwm_info(hdev, channel, attr);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int hl_write(struct device *dev, enum hwmon_sensor_types type,
			u32 attr, int channel, long val)
{
	struct hl_device *hdev = dev_get_drvdata(dev);

	if (hl_device_disabled_or_in_reset(hdev))
		return -ENODEV;

	switch (type) {
	case hwmon_pwm:
		switch (attr) {
		case hwmon_pwm_input:
		case hwmon_pwm_enable:
			break;
		default:
			return -EINVAL;
		}
		hl_set_pwm_info(hdev, channel, attr, val);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static umode_t hl_is_visible(const void *data, enum hwmon_sensor_types type,
				u32 attr, int channel)
{
	switch (type) {
	case hwmon_temp:
		switch (attr) {
		case hwmon_temp_input:
		case hwmon_temp_max:
		case hwmon_temp_max_hyst:
		case hwmon_temp_crit:
		case hwmon_temp_crit_hyst:
			return 0444;
		}
		break;
	case hwmon_in:
		switch (attr) {
		case hwmon_in_input:
		case hwmon_in_min:
		case hwmon_in_max:
			return 0444;
		}
		break;
	case hwmon_curr:
		switch (attr) {
		case hwmon_curr_input:
		case hwmon_curr_min:
		case hwmon_curr_max:
			return 0444;
		}
		break;
	case hwmon_fan:
		switch (attr) {
		case hwmon_fan_input:
		case hwmon_fan_min:
		case hwmon_fan_max:
			return 0444;
		}
		break;
	case hwmon_pwm:
		switch (attr) {
		case hwmon_pwm_input:
		case hwmon_pwm_enable:
			return 0644;
		}
		break;
	default:
		break;
	}
	return 0;
}

static const struct hwmon_ops hl_hwmon_ops = {
	.is_visible = hl_is_visible,
	.read = hl_read,
	.write = hl_write
};

long hl_get_temperature(struct hl_device *hdev, int sensor_index, u32 attr)
{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_TEMPERATURE_GET <<
				ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
			SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
		dev_err(hdev->dev,
			"Failed to get temperature from sensor %d, error %d\n",
			sensor_index, rc);
		result = 0;
	}

	return result;
}

long hl_get_voltage(struct hl_device *hdev, int sensor_index, u32 attr)
{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_VOLTAGE_GET <<
				ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
					SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
		dev_err(hdev->dev,
			"Failed to get voltage from sensor %d, error %d\n",
			sensor_index, rc);
		result = 0;
	}

	return result;
}

long hl_get_current(struct hl_device *hdev, int sensor_index, u32 attr)
{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_CURRENT_GET <<
				ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
					SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
		dev_err(hdev->dev,
			"Failed to get current from sensor %d, error %d\n",
			sensor_index, rc);
		result = 0;
	}

	return result;
}

long hl_get_fan_speed(struct hl_device *hdev, int sensor_index, u32 attr)
{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_FAN_SPEED_GET <<
				ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
					SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
		dev_err(hdev->dev,
			"Failed to get fan speed from sensor %d, error %d\n",
			sensor_index, rc);
		result = 0;
	}

	return result;
}

long hl_get_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr)
{
	struct armcp_packet pkt;
	long result;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_GET <<
				ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
					SENSORS_PKT_TIMEOUT, &result);

	if (rc) {
		dev_err(hdev->dev,
			"Failed to get pwm info from sensor %d, error %d\n",
			sensor_index, rc);
		result = 0;
	}

	return result;
}

void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
			long value)
{
	struct armcp_packet pkt;
	int rc;

	memset(&pkt, 0, sizeof(pkt));

	pkt.ctl = cpu_to_le32(ARMCP_PACKET_PWM_SET <<
				ARMCP_PKT_CTL_OPCODE_SHIFT);
	pkt.sensor_index = __cpu_to_le16(sensor_index);
	pkt.type = __cpu_to_le16(attr);
	pkt.value = cpu_to_le64(value);

	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
					SENSORS_PKT_TIMEOUT, NULL);

	if (rc)
		dev_err(hdev->dev,
			"Failed to set pwm info to sensor %d, error %d\n",
			sensor_index, rc);
}

int hl_hwmon_init(struct hl_device *hdev)
{
	struct device *dev = hdev->pdev ? &hdev->pdev->dev : hdev->dev;
	int rc;

	if ((hdev->hwmon_initialized) || !(hdev->fw_loading))
		return 0;

	if (hdev->hl_chip_info->info) {
		hdev->hl_chip_info->ops = &hl_hwmon_ops;

		hdev->hwmon_dev = hwmon_device_register_with_info(dev,
				"habanalabs", hdev, hdev->hl_chip_info, NULL);
		if (IS_ERR(hdev->hwmon_dev)) {
			rc = PTR_ERR(hdev->hwmon_dev);
			dev_err(hdev->dev,
				"Unable to register hwmon device: %d\n", rc);
			return rc;
		}

		dev_info(hdev->dev, "%s: add sensors information\n",
			dev_name(hdev->hwmon_dev));

		hdev->hwmon_initialized = true;
	} else {
		dev_info(hdev->dev, "no available sensors\n");
	}

	return 0;
}

void hl_hwmon_fini(struct hl_device *hdev)
{
	if (!hdev->hwmon_initialized)
		return;

	hwmon_device_unregister(hdev->hwmon_dev);
}