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 27 nvkm_therm_temp_set_defaults(struct nvkm_therm *obj) 28 { 29 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 30 31 therm->bios_sensor.offset_constant = 0; 32 33 therm->bios_sensor.thrs_fan_boost.temp = 90; 34 therm->bios_sensor.thrs_fan_boost.hysteresis = 3; 35 36 therm->bios_sensor.thrs_down_clock.temp = 95; 37 therm->bios_sensor.thrs_down_clock.hysteresis = 3; 38 39 therm->bios_sensor.thrs_critical.temp = 105; 40 therm->bios_sensor.thrs_critical.hysteresis = 5; 41 42 therm->bios_sensor.thrs_shutdown.temp = 135; 43 therm->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */ 44 } 45 46 47 static void 48 nvkm_therm_temp_safety_checks(struct nvkm_therm *obj) 49 { 50 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 51 struct nvbios_therm_sensor *s = &therm->bios_sensor; 52 53 /* enforce a minimum hysteresis on thresholds */ 54 s->thrs_fan_boost.hysteresis = max_t(u8, s->thrs_fan_boost.hysteresis, 2); 55 s->thrs_down_clock.hysteresis = max_t(u8, s->thrs_down_clock.hysteresis, 2); 56 s->thrs_critical.hysteresis = max_t(u8, s->thrs_critical.hysteresis, 2); 57 s->thrs_shutdown.hysteresis = max_t(u8, s->thrs_shutdown.hysteresis, 2); 58 } 59 60 /* must be called with alarm_program_lock taken ! */ 61 void 62 nvkm_therm_sensor_set_threshold_state(struct nvkm_therm *obj, 63 enum nvkm_therm_thrs thrs, 64 enum nvkm_therm_thrs_state st) 65 { 66 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 67 therm->sensor.alarm_state[thrs] = st; 68 } 69 70 /* must be called with alarm_program_lock taken ! */ 71 enum nvkm_therm_thrs_state 72 nvkm_therm_sensor_get_threshold_state(struct nvkm_therm *obj, 73 enum nvkm_therm_thrs thrs) 74 { 75 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 76 return therm->sensor.alarm_state[thrs]; 77 } 78 79 static void 80 nv_poweroff_work(struct work_struct *work) 81 { 82 orderly_poweroff(true); 83 kfree(work); 84 } 85 86 void 87 nvkm_therm_sensor_event(struct nvkm_therm *obj, enum nvkm_therm_thrs thrs, 88 enum nvkm_therm_thrs_direction dir) 89 { 90 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 91 bool active; 92 const char *thresolds[] = { 93 "fanboost", "downclock", "critical", "shutdown" 94 }; 95 int temperature = therm->base.temp_get(&therm->base); 96 97 if (thrs < 0 || thrs > 3) 98 return; 99 100 if (dir == NVKM_THERM_THRS_FALLING) 101 nv_info(therm, "temperature (%i C) went below the '%s' threshold\n", 102 temperature, thresolds[thrs]); 103 else 104 nv_info(therm, "temperature (%i C) hit the '%s' threshold\n", 105 temperature, thresolds[thrs]); 106 107 active = (dir == NVKM_THERM_THRS_RISING); 108 switch (thrs) { 109 case NVKM_THERM_THRS_FANBOOST: 110 if (active) { 111 nvkm_therm_fan_set(&therm->base, true, 100); 112 nvkm_therm_fan_mode(&therm->base, NVKM_THERM_CTRL_AUTO); 113 } 114 break; 115 case NVKM_THERM_THRS_DOWNCLOCK: 116 if (therm->emergency.downclock) 117 therm->emergency.downclock(&therm->base, active); 118 break; 119 case NVKM_THERM_THRS_CRITICAL: 120 if (therm->emergency.pause) 121 therm->emergency.pause(&therm->base, active); 122 break; 123 case NVKM_THERM_THRS_SHUTDOWN: 124 if (active) { 125 struct work_struct *work; 126 127 work = kmalloc(sizeof(*work), GFP_ATOMIC); 128 if (work) { 129 INIT_WORK(work, nv_poweroff_work); 130 schedule_work(work); 131 } 132 } 133 break; 134 case NVKM_THERM_THRS_NR: 135 break; 136 } 137 138 } 139 140 /* must be called with alarm_program_lock taken ! */ 141 static void 142 nvkm_therm_threshold_hyst_polling(struct nvkm_therm *therm, 143 const struct nvbios_therm_threshold *thrs, 144 enum nvkm_therm_thrs thrs_name) 145 { 146 enum nvkm_therm_thrs_direction direction; 147 enum nvkm_therm_thrs_state prev_state, new_state; 148 int temp = therm->temp_get(therm); 149 150 prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name); 151 152 if (temp >= thrs->temp && prev_state == NVKM_THERM_THRS_LOWER) { 153 direction = NVKM_THERM_THRS_RISING; 154 new_state = NVKM_THERM_THRS_HIGHER; 155 } else if (temp <= thrs->temp - thrs->hysteresis && 156 prev_state == NVKM_THERM_THRS_HIGHER) { 157 direction = NVKM_THERM_THRS_FALLING; 158 new_state = NVKM_THERM_THRS_LOWER; 159 } else 160 return; /* nothing to do */ 161 162 nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state); 163 nvkm_therm_sensor_event(therm, thrs_name, direction); 164 } 165 166 static void 167 alarm_timer_callback(struct nvkm_alarm *alarm) 168 { 169 struct nvkm_therm_priv *therm = 170 container_of(alarm, struct nvkm_therm_priv, sensor.therm_poll_alarm); 171 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 172 struct nvkm_timer *tmr = nvkm_timer(therm); 173 unsigned long flags; 174 175 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); 176 177 nvkm_therm_threshold_hyst_polling(&therm->base, &sensor->thrs_fan_boost, 178 NVKM_THERM_THRS_FANBOOST); 179 180 nvkm_therm_threshold_hyst_polling(&therm->base, 181 &sensor->thrs_down_clock, 182 NVKM_THERM_THRS_DOWNCLOCK); 183 184 nvkm_therm_threshold_hyst_polling(&therm->base, &sensor->thrs_critical, 185 NVKM_THERM_THRS_CRITICAL); 186 187 nvkm_therm_threshold_hyst_polling(&therm->base, &sensor->thrs_shutdown, 188 NVKM_THERM_THRS_SHUTDOWN); 189 190 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); 191 192 /* schedule the next poll in one second */ 193 if (therm->base.temp_get(&therm->base) >= 0 && list_empty(&alarm->head)) 194 tmr->alarm(tmr, 1000000000ULL, alarm); 195 } 196 197 void 198 nvkm_therm_program_alarms_polling(struct nvkm_therm *obj) 199 { 200 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 201 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 202 203 nv_debug(therm, 204 "programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n", 205 sensor->thrs_fan_boost.temp, sensor->thrs_fan_boost.hysteresis, 206 sensor->thrs_down_clock.temp, 207 sensor->thrs_down_clock.hysteresis, 208 sensor->thrs_critical.temp, sensor->thrs_critical.hysteresis, 209 sensor->thrs_shutdown.temp, sensor->thrs_shutdown.hysteresis); 210 211 alarm_timer_callback(&therm->sensor.therm_poll_alarm); 212 } 213 214 int 215 nvkm_therm_sensor_init(struct nvkm_therm *obj) 216 { 217 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 218 therm->sensor.program_alarms(&therm->base); 219 return 0; 220 } 221 222 int 223 nvkm_therm_sensor_fini(struct nvkm_therm *obj, bool suspend) 224 { 225 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 226 struct nvkm_timer *tmr = nvkm_timer(therm); 227 228 if (suspend) 229 tmr->alarm_cancel(tmr, &therm->sensor.therm_poll_alarm); 230 return 0; 231 } 232 233 void 234 nvkm_therm_sensor_preinit(struct nvkm_therm *therm) 235 { 236 const char *sensor_avail = "yes"; 237 238 if (therm->temp_get(therm) < 0) 239 sensor_avail = "no"; 240 241 nv_info(therm, "internal sensor: %s\n", sensor_avail); 242 } 243 244 int 245 nvkm_therm_sensor_ctor(struct nvkm_therm *obj) 246 { 247 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 248 struct nvkm_bios *bios = nvkm_bios(therm); 249 250 nvkm_alarm_init(&therm->sensor.therm_poll_alarm, alarm_timer_callback); 251 252 nvkm_therm_temp_set_defaults(&therm->base); 253 if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE, 254 &therm->bios_sensor)) 255 nv_error(therm, "nvbios_therm_sensor_parse failed\n"); 256 nvkm_therm_temp_safety_checks(&therm->base); 257 258 return 0; 259 } 260