1 /*
2 * Copyright 2012 The Nouveau community
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Martin Peres
23 */
24 #include "priv.h"
25
26 static void
nvkm_therm_temp_set_defaults(struct nvkm_therm * therm)27 nvkm_therm_temp_set_defaults(struct nvkm_therm *therm)
28 {
29 therm->bios_sensor.offset_constant = 0;
30
31 therm->bios_sensor.thrs_fan_boost.temp = 90;
32 therm->bios_sensor.thrs_fan_boost.hysteresis = 3;
33
34 therm->bios_sensor.thrs_down_clock.temp = 95;
35 therm->bios_sensor.thrs_down_clock.hysteresis = 3;
36
37 therm->bios_sensor.thrs_critical.temp = 105;
38 therm->bios_sensor.thrs_critical.hysteresis = 5;
39
40 therm->bios_sensor.thrs_shutdown.temp = 135;
41 therm->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */
42 }
43
44 static void
nvkm_therm_temp_safety_checks(struct nvkm_therm * therm)45 nvkm_therm_temp_safety_checks(struct nvkm_therm *therm)
46 {
47 struct nvbios_therm_sensor *s = &therm->bios_sensor;
48
49 /* enforce a minimum hysteresis on thresholds */
50 s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2);
51 s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2);
52 s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2);
53 s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2);
54 }
55
56 /* must be called with alarm_program_lock taken ! */
57 void
nvkm_therm_sensor_set_threshold_state(struct nvkm_therm * therm,enum nvkm_therm_thrs thrs,enum nvkm_therm_thrs_state st)58 nvkm_therm_sensor_set_threshold_state(struct nvkm_therm *therm,
59 enum nvkm_therm_thrs thrs,
60 enum nvkm_therm_thrs_state st)
61 {
62 therm->sensor.alarm_state[thrs] = st;
63 }
64
65 /* must be called with alarm_program_lock taken ! */
66 enum nvkm_therm_thrs_state
nvkm_therm_sensor_get_threshold_state(struct nvkm_therm * therm,enum nvkm_therm_thrs thrs)67 nvkm_therm_sensor_get_threshold_state(struct nvkm_therm *therm,
68 enum nvkm_therm_thrs thrs)
69 {
70 return therm->sensor.alarm_state[thrs];
71 }
72
73 static void
nv_poweroff_work(struct work_struct * work)74 nv_poweroff_work(struct work_struct *work)
75 {
76 orderly_poweroff(true);
77 kfree(work);
78 }
79
80 void
nvkm_therm_sensor_event(struct nvkm_therm * therm,enum nvkm_therm_thrs thrs,enum nvkm_therm_thrs_direction dir)81 nvkm_therm_sensor_event(struct nvkm_therm *therm, enum nvkm_therm_thrs thrs,
82 enum nvkm_therm_thrs_direction dir)
83 {
84 struct nvkm_subdev *subdev = &therm->subdev;
85 bool active;
86 static const char * const thresholds[] = {
87 "fanboost", "downclock", "critical", "shutdown"
88 };
89 int temperature = therm->func->temp_get(therm);
90
91 if (thrs < 0 || thrs > 3)
92 return;
93
94 if (dir == NVKM_THERM_THRS_FALLING)
95 nvkm_info(subdev,
96 "temperature (%i C) went below the '%s' threshold\n",
97 temperature, thresholds[thrs]);
98 else
99 nvkm_info(subdev, "temperature (%i C) hit the '%s' threshold\n",
100 temperature, thresholds[thrs]);
101
102 active = (dir == NVKM_THERM_THRS_RISING);
103 switch (thrs) {
104 case NVKM_THERM_THRS_FANBOOST:
105 if (active) {
106 nvkm_therm_fan_set(therm, true, 100);
107 nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
108 }
109 break;
110 case NVKM_THERM_THRS_DOWNCLOCK:
111 if (therm->emergency.downclock)
112 therm->emergency.downclock(therm, active);
113 break;
114 case NVKM_THERM_THRS_CRITICAL:
115 if (therm->emergency.pause)
116 therm->emergency.pause(therm, active);
117 break;
118 case NVKM_THERM_THRS_SHUTDOWN:
119 if (active) {
120 struct work_struct *work;
121
122 work = kmalloc(sizeof(*work), GFP_ATOMIC);
123 if (work) {
124 INIT_WORK(work, nv_poweroff_work);
125 schedule_work(work);
126 }
127 }
128 break;
129 case NVKM_THERM_THRS_NR:
130 break;
131 }
132
133 }
134
135 /* must be called with alarm_program_lock taken ! */
136 static void
nvkm_therm_threshold_hyst_polling(struct nvkm_therm * therm,const struct nvbios_therm_threshold * thrs,enum nvkm_therm_thrs thrs_name)137 nvkm_therm_threshold_hyst_polling(struct nvkm_therm *therm,
138 const struct nvbios_therm_threshold *thrs,
139 enum nvkm_therm_thrs thrs_name)
140 {
141 enum nvkm_therm_thrs_direction direction;
142 enum nvkm_therm_thrs_state prev_state, new_state;
143 int temp = therm->func->temp_get(therm);
144
145 prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
146
147 if (temp >= thrs->temp && prev_state == NVKM_THERM_THRS_LOWER) {
148 direction = NVKM_THERM_THRS_RISING;
149 new_state = NVKM_THERM_THRS_HIGHER;
150 } else if (temp <= thrs->temp - thrs->hysteresis &&
151 prev_state == NVKM_THERM_THRS_HIGHER) {
152 direction = NVKM_THERM_THRS_FALLING;
153 new_state = NVKM_THERM_THRS_LOWER;
154 } else
155 return; /* nothing to do */
156
157 nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
158 nvkm_therm_sensor_event(therm, thrs_name, direction);
159 }
160
161 static void
alarm_timer_callback(struct nvkm_alarm * alarm)162 alarm_timer_callback(struct nvkm_alarm *alarm)
163 {
164 struct nvkm_therm *therm =
165 container_of(alarm, struct nvkm_therm, sensor.therm_poll_alarm);
166 struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
167 struct nvkm_timer *tmr = therm->subdev.device->timer;
168 unsigned long flags;
169
170 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
171
172 nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost,
173 NVKM_THERM_THRS_FANBOOST);
174
175 nvkm_therm_threshold_hyst_polling(therm,
176 &sensor->thrs_down_clock,
177 NVKM_THERM_THRS_DOWNCLOCK);
178
179 nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_critical,
180 NVKM_THERM_THRS_CRITICAL);
181
182 nvkm_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown,
183 NVKM_THERM_THRS_SHUTDOWN);
184
185 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
186
187 /* schedule the next poll in one second */
188 if (therm->func->temp_get(therm) >= 0)
189 nvkm_timer_alarm(tmr, 1000000000ULL, alarm);
190 }
191
192 void
nvkm_therm_program_alarms_polling(struct nvkm_therm * therm)193 nvkm_therm_program_alarms_polling(struct nvkm_therm *therm)
194 {
195 struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
196
197 nvkm_debug(&therm->subdev,
198 "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
199 sensor->thrs_fan_boost.temp,
200 sensor->thrs_fan_boost.hysteresis,
201 sensor->thrs_down_clock.temp,
202 sensor->thrs_down_clock.hysteresis,
203 sensor->thrs_critical.temp,
204 sensor->thrs_critical.hysteresis,
205 sensor->thrs_shutdown.temp,
206 sensor->thrs_shutdown.hysteresis);
207
208 alarm_timer_callback(&therm->sensor.therm_poll_alarm);
209 }
210
211 int
nvkm_therm_sensor_init(struct nvkm_therm * therm)212 nvkm_therm_sensor_init(struct nvkm_therm *therm)
213 {
214 therm->func->program_alarms(therm);
215 return 0;
216 }
217
218 int
nvkm_therm_sensor_fini(struct nvkm_therm * therm,bool suspend)219 nvkm_therm_sensor_fini(struct nvkm_therm *therm, bool suspend)
220 {
221 struct nvkm_timer *tmr = therm->subdev.device->timer;
222 if (suspend)
223 nvkm_timer_alarm(tmr, 0, &therm->sensor.therm_poll_alarm);
224 return 0;
225 }
226
227 void
nvkm_therm_sensor_preinit(struct nvkm_therm * therm)228 nvkm_therm_sensor_preinit(struct nvkm_therm *therm)
229 {
230 const char *sensor_avail = "yes";
231
232 if (therm->func->temp_get(therm) < 0)
233 sensor_avail = "no";
234
235 nvkm_debug(&therm->subdev, "internal sensor: %s\n", sensor_avail);
236 }
237
238 int
nvkm_therm_sensor_ctor(struct nvkm_therm * therm)239 nvkm_therm_sensor_ctor(struct nvkm_therm *therm)
240 {
241 struct nvkm_subdev *subdev = &therm->subdev;
242 struct nvkm_bios *bios = subdev->device->bios;
243
244 nvkm_alarm_init(&therm->sensor.therm_poll_alarm, alarm_timer_callback);
245
246 nvkm_therm_temp_set_defaults(therm);
247 if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,
248 &therm->bios_sensor))
249 nvkm_error(subdev, "nvbios_therm_sensor_parse failed\n");
250 nvkm_therm_temp_safety_checks(therm);
251
252 return 0;
253 }
254