summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/nouveau/nvkm/subdev/therm/temp.c
blob: 4ab7ef7da25474862a308816218e44d053972d07 (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
/*
 * Copyright 2012 The Nouveau community
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Martin Peres
 */
#include "priv.h"

static void
nvkm_therm_temp_set_defaults(struct nvkm_therm *therm)
{
	therm->bios_sensor.offset_constant = 0;

	therm->bios_sensor.thrs_fan_boost.temp = 90;
	therm->bios_sensor.thrs_fan_boost.hysteresis = 3;

	therm->bios_sensor.thrs_down_clock.temp = 95;
	therm->bios_sensor.thrs_down_clock.hysteresis = 3;

	therm->bios_sensor.thrs_critical.temp = 105;
	therm->bios_sensor.thrs_critical.hysteresis = 5;

	therm->bios_sensor.thrs_shutdown.temp = 135;
	therm->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */
}

static void
nvkm_therm_temp_safety_checks(struct nvkm_therm *therm)
{
	struct nvbios_therm_sensor *s = &therm->bios_sensor;

	/* enforce a minimum hysteresis on thresholds */
	s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2);
	s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2);
	s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2);
	s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2);
}

/* must be called with alarm_program_lock taken ! */
void
nvkm_therm_sensor_set_threshold_state(struct nvkm_therm *therm,
				      enum nvkm_therm_thrs thrs,
				      enum nvkm_therm_thrs_state st)
{
	therm->sensor.alarm_state[thrs] = st;
}

/* must be called with alarm_program_lock taken ! */
enum nvkm_therm_thrs_state
nvkm_therm_sensor_get_threshold_state(struct nvkm_therm *therm,
				      enum nvkm_therm_thrs thrs)
{
	return therm->sensor.alarm_state[thrs];
}

static void
nv_poweroff_work(struct work_struct *work)
{
	orderly_poweroff(true);
	kfree(work);
}

void
nvkm_therm_sensor_event(struct nvkm_therm *therm, enum nvkm_therm_thrs thrs,
			enum nvkm_therm_thrs_direction dir)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	bool active;
	const char *thresolds[] = {
		"fanboost", "downclock", "critical", "shutdown"
	};
	int temperature = therm->func->temp_get(therm);

	if (thrs < 0 || thrs > 3)
		return;

	if (dir == NVKM_THERM_THRS_FALLING)
		nvkm_info(subdev,
			  "temperature (%i C) went below the '%s' threshold\n",
			  temperature, thresolds[thrs]);
	else
		nvkm_info(subdev, "temperature (%i C) hit the '%s' threshold\n",
			  temperature, thresolds[thrs]);

	active = (dir == NVKM_THERM_THRS_RISING);
	switch (thrs) {
	case NVKM_THERM_THRS_FANBOOST:
		if (active) {
			nvkm_therm_fan_set(therm, true, 100);
			nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
		}
		break;
	case NVKM_THERM_THRS_DOWNCLOCK:
		if (therm->emergency.downclock)
			therm->emergency.downclock(therm, active);
		break;
	case NVKM_THERM_THRS_CRITICAL:
		if (therm->emergency.pause)
			therm->emergency.pause(therm, active);
		break;
	case NVKM_THERM_THRS_SHUTDOWN:
		if (active) {
			struct work_struct *work;

			work = kmalloc(sizeof(*work), GFP_ATOMIC);
			if (work) {
				INIT_WORK(work, nv_poweroff_work);
				schedule_work(work);
			}
		}
		break;
	case NVKM_THERM_THRS_NR:
		break;
	}

}

/* must be called with alarm_program_lock taken ! */
static void
nvkm_therm_threshold_hyst_polling(struct nvkm_therm *therm,
				  const struct nvbios_therm_threshold *thrs,
				  enum nvkm_therm_thrs thrs_name)
{
	enum nvkm_therm_thrs_direction direction;
	enum nvkm_therm_thrs_state prev_state, new_state;
	int temp = therm->func->temp_get(therm);

	prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);

	if (temp >= thrs->temp && prev_state == NVKM_THERM_THRS_LOWER) {
		direction = NVKM_THERM_THRS_RISING;
		new_state = NVKM_THERM_THRS_HIGHER;
	} else if (temp <= thrs->temp - thrs->hysteresis &&
			prev_state == NVKM_THERM_THRS_HIGHER) {
		direction = NVKM_THERM_THRS_FALLING;
		new_state = NVKM_THERM_THRS_LOWER;
	} else
		return; /* nothing to do */

	nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
	nvkm_therm_sensor_event(therm, thrs_name, direction);
}

static void
alarm_timer_callback(struct nvkm_alarm *alarm)
{
	struct nvkm_therm *therm =
		container_of(alarm, struct nvkm_therm, sensor.therm_poll_alarm);
	struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
	struct nvkm_timer *tmr = therm->subdev.device->timer;
	unsigned long flags;

	spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);

	nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost,
					  NVKM_THERM_THRS_FANBOOST);

	nvkm_therm_threshold_hyst_polling(therm,
					  &sensor->thrs_down_clock,
					  NVKM_THERM_THRS_DOWNCLOCK);

	nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_critical,
					  NVKM_THERM_THRS_CRITICAL);

	nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown,
					  NVKM_THERM_THRS_SHUTDOWN);

	spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);

	/* schedule the next poll in one second */
	if (therm->func->temp_get(therm) >= 0 && list_empty(&alarm->head))
		tmr->alarm(tmr, 1000000000ULL, alarm);
}

void
nvkm_therm_program_alarms_polling(struct nvkm_therm *therm)
{
	struct nvbios_therm_sensor *sensor = &therm->bios_sensor;

	nvkm_debug(&therm->subdev,
		   "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
		   sensor->thrs_fan_boost.temp,
		   sensor->thrs_fan_boost.hysteresis,
		   sensor->thrs_down_clock.temp,
		   sensor->thrs_down_clock.hysteresis,
		   sensor->thrs_critical.temp,
		   sensor->thrs_critical.hysteresis,
		   sensor->thrs_shutdown.temp,
		   sensor->thrs_shutdown.hysteresis);

	alarm_timer_callback(&therm->sensor.therm_poll_alarm);
}

int
nvkm_therm_sensor_init(struct nvkm_therm *therm)
{
	therm->func->program_alarms(therm);
	return 0;
}

int
nvkm_therm_sensor_fini(struct nvkm_therm *therm, bool suspend)
{
	struct nvkm_timer *tmr = therm->subdev.device->timer;
	if (suspend)
		tmr->alarm_cancel(tmr, &therm->sensor.therm_poll_alarm);
	return 0;
}

void
nvkm_therm_sensor_preinit(struct nvkm_therm *therm)
{
	const char *sensor_avail = "yes";

	if (therm->func->temp_get(therm) < 0)
		sensor_avail = "no";

	nvkm_debug(&therm->subdev, "internal sensor: %s\n", sensor_avail);
}

int
nvkm_therm_sensor_ctor(struct nvkm_therm *therm)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	struct nvkm_bios *bios = subdev->device->bios;

	nvkm_alarm_init(&therm->sensor.therm_poll_alarm, alarm_timer_callback);

	nvkm_therm_temp_set_defaults(therm);
	if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,
				      &therm->bios_sensor))
		nvkm_error(subdev, "nvbios_therm_sensor_parse failed\n");
	nvkm_therm_temp_safety_checks(therm);

	return 0;
}