| 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 | |