1 | /* $NetBSD: nouveau_subdev_therm_temp.c,v 1.2 2016/02/05 23:49:26 riastradh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2012 The Nouveau community |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a |
7 | * copy of this software and associated documentation files (the "Software"), |
8 | * to deal in the Software without restriction, including without limitation |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
10 | * and/or sell copies of the Software, and to permit persons to whom the |
11 | * Software is furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
22 | * OTHER DEALINGS IN THE SOFTWARE. |
23 | * |
24 | * Authors: Martin Peres |
25 | */ |
26 | |
27 | #include <sys/cdefs.h> |
28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_therm_temp.c,v 1.2 2016/02/05 23:49:26 riastradh Exp $" ); |
29 | |
30 | #include "priv.h" |
31 | |
32 | #include <core/object.h> |
33 | #include <core/device.h> |
34 | |
35 | #include <subdev/bios.h> |
36 | |
37 | static void |
38 | nouveau_therm_temp_set_defaults(struct nouveau_therm *therm) |
39 | { |
40 | struct nouveau_therm_priv *priv = (void *)therm; |
41 | |
42 | priv->bios_sensor.offset_constant = 0; |
43 | |
44 | priv->bios_sensor.thrs_fan_boost.temp = 90; |
45 | priv->bios_sensor.thrs_fan_boost.hysteresis = 3; |
46 | |
47 | priv->bios_sensor.thrs_down_clock.temp = 95; |
48 | priv->bios_sensor.thrs_down_clock.hysteresis = 3; |
49 | |
50 | priv->bios_sensor.thrs_critical.temp = 105; |
51 | priv->bios_sensor.thrs_critical.hysteresis = 5; |
52 | |
53 | priv->bios_sensor.thrs_shutdown.temp = 135; |
54 | priv->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */ |
55 | } |
56 | |
57 | |
58 | static void |
59 | nouveau_therm_temp_safety_checks(struct nouveau_therm *therm) |
60 | { |
61 | struct nouveau_therm_priv *priv = (void *)therm; |
62 | struct nvbios_therm_sensor *s = &priv->bios_sensor; |
63 | |
64 | /* enforce a minimum hysteresis on thresholds */ |
65 | s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2); |
66 | s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2); |
67 | s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2); |
68 | s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2); |
69 | } |
70 | |
71 | /* must be called with alarm_program_lock taken ! */ |
72 | void nouveau_therm_sensor_set_threshold_state(struct nouveau_therm *therm, |
73 | enum nouveau_therm_thrs thrs, |
74 | enum nouveau_therm_thrs_state st) |
75 | { |
76 | struct nouveau_therm_priv *priv = (void *)therm; |
77 | priv->sensor.alarm_state[thrs] = st; |
78 | } |
79 | |
80 | /* must be called with alarm_program_lock taken ! */ |
81 | enum nouveau_therm_thrs_state |
82 | nouveau_therm_sensor_get_threshold_state(struct nouveau_therm *therm, |
83 | enum nouveau_therm_thrs thrs) |
84 | { |
85 | struct nouveau_therm_priv *priv = (void *)therm; |
86 | return priv->sensor.alarm_state[thrs]; |
87 | } |
88 | |
89 | static void |
90 | nv_poweroff_work(struct work_struct *work) |
91 | { |
92 | orderly_poweroff(true); |
93 | kfree(work); |
94 | } |
95 | |
96 | void nouveau_therm_sensor_event(struct nouveau_therm *therm, |
97 | enum nouveau_therm_thrs thrs, |
98 | enum nouveau_therm_thrs_direction dir) |
99 | { |
100 | struct nouveau_therm_priv *priv = (void *)therm; |
101 | bool active; |
102 | const char *thresolds[] = { |
103 | "fanboost" , "downclock" , "critical" , "shutdown" |
104 | }; |
105 | int temperature = therm->temp_get(therm); |
106 | |
107 | if ((unsigned)thrs >= __arraycount(thresolds)) |
108 | return; |
109 | |
110 | if (dir == NOUVEAU_THERM_THRS_FALLING) |
111 | nv_info(therm, "temperature (%i C) went below the '%s' threshold\n" , |
112 | temperature, thresolds[thrs]); |
113 | else |
114 | nv_info(therm, "temperature (%i C) hit the '%s' threshold\n" , |
115 | temperature, thresolds[thrs]); |
116 | |
117 | active = (dir == NOUVEAU_THERM_THRS_RISING); |
118 | switch (thrs) { |
119 | case NOUVEAU_THERM_THRS_FANBOOST: |
120 | if (active) { |
121 | nouveau_therm_fan_set(therm, true, 100); |
122 | nouveau_therm_fan_mode(therm, NOUVEAU_THERM_CTRL_AUTO); |
123 | } |
124 | break; |
125 | case NOUVEAU_THERM_THRS_DOWNCLOCK: |
126 | if (priv->emergency.downclock) |
127 | priv->emergency.downclock(therm, active); |
128 | break; |
129 | case NOUVEAU_THERM_THRS_CRITICAL: |
130 | if (priv->emergency.pause) |
131 | priv->emergency.pause(therm, active); |
132 | break; |
133 | case NOUVEAU_THERM_THRS_SHUTDOWN: |
134 | if (active) { |
135 | struct work_struct *work; |
136 | |
137 | work = kmalloc(sizeof(*work), GFP_ATOMIC); |
138 | if (work) { |
139 | INIT_WORK(work, nv_poweroff_work); |
140 | schedule_work(work); |
141 | } |
142 | } |
143 | break; |
144 | case NOUVEAU_THERM_THRS_NR: |
145 | break; |
146 | } |
147 | |
148 | } |
149 | |
150 | /* must be called with alarm_program_lock taken ! */ |
151 | static void |
152 | nouveau_therm_threshold_hyst_polling(struct nouveau_therm *therm, |
153 | const struct nvbios_therm_threshold *thrs, |
154 | enum nouveau_therm_thrs thrs_name) |
155 | { |
156 | enum nouveau_therm_thrs_direction direction; |
157 | enum nouveau_therm_thrs_state prev_state, new_state; |
158 | int temp = therm->temp_get(therm); |
159 | |
160 | prev_state = nouveau_therm_sensor_get_threshold_state(therm, thrs_name); |
161 | |
162 | if (temp >= thrs->temp && prev_state == NOUVEAU_THERM_THRS_LOWER) { |
163 | direction = NOUVEAU_THERM_THRS_RISING; |
164 | new_state = NOUVEAU_THERM_THRS_HIGHER; |
165 | } else if (temp <= thrs->temp - thrs->hysteresis && |
166 | prev_state == NOUVEAU_THERM_THRS_HIGHER) { |
167 | direction = NOUVEAU_THERM_THRS_FALLING; |
168 | new_state = NOUVEAU_THERM_THRS_LOWER; |
169 | } else |
170 | return; /* nothing to do */ |
171 | |
172 | nouveau_therm_sensor_set_threshold_state(therm, thrs_name, new_state); |
173 | nouveau_therm_sensor_event(therm, thrs_name, direction); |
174 | } |
175 | |
176 | static void |
177 | alarm_timer_callback(struct nouveau_alarm *alarm) |
178 | { |
179 | struct nouveau_therm_priv *priv = |
180 | container_of(alarm, struct nouveau_therm_priv, sensor.therm_poll_alarm); |
181 | struct nvbios_therm_sensor *sensor = &priv->bios_sensor; |
182 | struct nouveau_timer *ptimer = nouveau_timer(priv); |
183 | struct nouveau_therm *therm = &priv->base; |
184 | unsigned long flags; |
185 | |
186 | spin_lock_irqsave(&priv->sensor.alarm_program_lock, flags); |
187 | |
188 | nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_fan_boost, |
189 | NOUVEAU_THERM_THRS_FANBOOST); |
190 | |
191 | nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_down_clock, |
192 | NOUVEAU_THERM_THRS_DOWNCLOCK); |
193 | |
194 | nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_critical, |
195 | NOUVEAU_THERM_THRS_CRITICAL); |
196 | |
197 | nouveau_therm_threshold_hyst_polling(therm, &sensor->thrs_shutdown, |
198 | NOUVEAU_THERM_THRS_SHUTDOWN); |
199 | |
200 | /* schedule the next poll in one second */ |
201 | if (therm->temp_get(therm) >= 0 && list_empty(&alarm->head)) |
202 | ptimer->alarm(ptimer, 1000 * 1000 * 1000, alarm); |
203 | |
204 | spin_unlock_irqrestore(&priv->sensor.alarm_program_lock, flags); |
205 | } |
206 | |
207 | void |
208 | nouveau_therm_program_alarms_polling(struct nouveau_therm *therm) |
209 | { |
210 | struct nouveau_therm_priv *priv = (void *)therm; |
211 | struct nvbios_therm_sensor *sensor = &priv->bios_sensor; |
212 | |
213 | nv_debug(therm, |
214 | "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n" , |
215 | sensor->thrs_fan_boost.temp, sensor->thrs_fan_boost.hysteresis, |
216 | sensor->thrs_down_clock.temp, |
217 | sensor->thrs_down_clock.hysteresis, |
218 | sensor->thrs_critical.temp, sensor->thrs_critical.hysteresis, |
219 | sensor->thrs_shutdown.temp, sensor->thrs_shutdown.hysteresis); |
220 | |
221 | alarm_timer_callback(&priv->sensor.therm_poll_alarm); |
222 | } |
223 | |
224 | int |
225 | nouveau_therm_sensor_init(struct nouveau_therm *therm) |
226 | { |
227 | struct nouveau_therm_priv *priv = (void *)therm; |
228 | priv->sensor.program_alarms(therm); |
229 | return 0; |
230 | } |
231 | |
232 | int |
233 | nouveau_therm_sensor_fini(struct nouveau_therm *therm, bool suspend) |
234 | { |
235 | struct nouveau_therm_priv *priv = (void *)therm; |
236 | struct nouveau_timer *ptimer = nouveau_timer(therm); |
237 | |
238 | if (suspend) |
239 | ptimer->alarm_cancel(ptimer, &priv->sensor.therm_poll_alarm); |
240 | return 0; |
241 | } |
242 | |
243 | void |
244 | nouveau_therm_sensor_preinit(struct nouveau_therm *therm) |
245 | { |
246 | const char *sensor_avail = "yes" ; |
247 | |
248 | if (therm->temp_get(therm) < 0) |
249 | sensor_avail = "no" ; |
250 | |
251 | nv_info(therm, "internal sensor: %s\n" , sensor_avail); |
252 | } |
253 | |
254 | int |
255 | nouveau_therm_sensor_ctor(struct nouveau_therm *therm) |
256 | { |
257 | struct nouveau_therm_priv *priv = (void *)therm; |
258 | struct nouveau_bios *bios = nouveau_bios(therm); |
259 | |
260 | nouveau_alarm_init(&priv->sensor.therm_poll_alarm, alarm_timer_callback); |
261 | |
262 | nouveau_therm_temp_set_defaults(therm); |
263 | if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE, |
264 | &priv->bios_sensor)) |
265 | nv_error(therm, "nvbios_therm_sensor_parse failed\n" ); |
266 | nouveau_therm_temp_safety_checks(therm); |
267 | |
268 | return 0; |
269 | } |
270 | |