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 int 27 nvkm_therm_update_trip(struct nvkm_therm *obj) 28 { 29 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 30 struct nvbios_therm_trip_point *trip = therm->fan->bios.trip, 31 *cur_trip = NULL, 32 *last_trip = therm->last_trip; 33 u8 temp = therm->base.temp_get(&therm->base); 34 u16 duty, i; 35 36 /* look for the trip point corresponding to the current temperature */ 37 cur_trip = NULL; 38 for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) { 39 if (temp >= trip[i].temp) 40 cur_trip = &trip[i]; 41 } 42 43 /* account for the hysteresis cycle */ 44 if (last_trip && temp <= (last_trip->temp) && 45 temp > (last_trip->temp - last_trip->hysteresis)) 46 cur_trip = last_trip; 47 48 if (cur_trip) { 49 duty = cur_trip->fan_duty; 50 therm->last_trip = cur_trip; 51 } else { 52 duty = 0; 53 therm->last_trip = NULL; 54 } 55 56 return duty; 57 } 58 59 static int 60 nvkm_therm_update_linear(struct nvkm_therm *obj) 61 { 62 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 63 u8 linear_min_temp = therm->fan->bios.linear_min_temp; 64 u8 linear_max_temp = therm->fan->bios.linear_max_temp; 65 u8 temp = therm->base.temp_get(&therm->base); 66 u16 duty; 67 68 /* handle the non-linear part first */ 69 if (temp < linear_min_temp) 70 return therm->fan->bios.min_duty; 71 else if (temp > linear_max_temp) 72 return therm->fan->bios.max_duty; 73 74 /* we are in the linear zone */ 75 duty = (temp - linear_min_temp); 76 duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty); 77 duty /= (linear_max_temp - linear_min_temp); 78 duty += therm->fan->bios.min_duty; 79 return duty; 80 } 81 82 static void 83 nvkm_therm_update(struct nvkm_therm *obj, int mode) 84 { 85 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 86 struct nvkm_timer *tmr = nvkm_timer(therm); 87 unsigned long flags; 88 bool immd = true; 89 bool poll = true; 90 int duty = -1; 91 92 spin_lock_irqsave(&therm->lock, flags); 93 if (mode < 0) 94 mode = therm->mode; 95 therm->mode = mode; 96 97 switch (mode) { 98 case NVKM_THERM_CTRL_MANUAL: 99 tmr->alarm_cancel(tmr, &therm->alarm); 100 duty = nvkm_therm_fan_get(&therm->base); 101 if (duty < 0) 102 duty = 100; 103 poll = false; 104 break; 105 case NVKM_THERM_CTRL_AUTO: 106 switch(therm->fan->bios.fan_mode) { 107 case NVBIOS_THERM_FAN_TRIP: 108 duty = nvkm_therm_update_trip(&therm->base); 109 break; 110 case NVBIOS_THERM_FAN_LINEAR: 111 duty = nvkm_therm_update_linear(&therm->base); 112 break; 113 case NVBIOS_THERM_FAN_OTHER: 114 if (therm->cstate) 115 duty = therm->cstate; 116 poll = false; 117 break; 118 } 119 immd = false; 120 break; 121 case NVKM_THERM_CTRL_NONE: 122 default: 123 tmr->alarm_cancel(tmr, &therm->alarm); 124 poll = false; 125 } 126 127 if (list_empty(&therm->alarm.head) && poll) 128 tmr->alarm(tmr, 1000000000ULL, &therm->alarm); 129 spin_unlock_irqrestore(&therm->lock, flags); 130 131 if (duty >= 0) { 132 nv_debug(therm, "FAN target request: %d%%\n", duty); 133 nvkm_therm_fan_set(&therm->base, immd, duty); 134 } 135 } 136 137 int 138 nvkm_therm_cstate(struct nvkm_therm *obj, int fan, int dir) 139 { 140 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 141 if (!dir || (dir < 0 && fan < therm->cstate) || 142 (dir > 0 && fan > therm->cstate)) { 143 nv_debug(therm, "default fan speed -> %d%%\n", fan); 144 therm->cstate = fan; 145 nvkm_therm_update(&therm->base, -1); 146 } 147 return 0; 148 } 149 150 static void 151 nvkm_therm_alarm(struct nvkm_alarm *alarm) 152 { 153 struct nvkm_therm_priv *therm = 154 container_of(alarm, struct nvkm_therm_priv, alarm); 155 nvkm_therm_update(&therm->base, -1); 156 } 157 158 int 159 nvkm_therm_fan_mode(struct nvkm_therm *obj, int mode) 160 { 161 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 162 struct nvkm_device *device = nv_device(therm); 163 static const char *name[] = { 164 "disabled", 165 "manual", 166 "automatic" 167 }; 168 169 /* The default PPWR ucode on fermi interferes with fan management */ 170 if ((mode >= ARRAY_SIZE(name)) || 171 (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 && 172 !nvkm_subdev(device, NVDEV_SUBDEV_PMU))) 173 return -EINVAL; 174 175 /* do not allow automatic fan management if the thermal sensor is 176 * not available */ 177 if (mode == NVKM_THERM_CTRL_AUTO && 178 therm->base.temp_get(&therm->base) < 0) 179 return -EINVAL; 180 181 if (therm->mode == mode) 182 return 0; 183 184 nv_info(therm, "fan management: %s\n", name[mode]); 185 nvkm_therm_update(&therm->base, mode); 186 return 0; 187 } 188 189 int 190 nvkm_therm_attr_get(struct nvkm_therm *obj, enum nvkm_therm_attr_type type) 191 { 192 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 193 194 switch (type) { 195 case NVKM_THERM_ATTR_FAN_MIN_DUTY: 196 return therm->fan->bios.min_duty; 197 case NVKM_THERM_ATTR_FAN_MAX_DUTY: 198 return therm->fan->bios.max_duty; 199 case NVKM_THERM_ATTR_FAN_MODE: 200 return therm->mode; 201 case NVKM_THERM_ATTR_THRS_FAN_BOOST: 202 return therm->bios_sensor.thrs_fan_boost.temp; 203 case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST: 204 return therm->bios_sensor.thrs_fan_boost.hysteresis; 205 case NVKM_THERM_ATTR_THRS_DOWN_CLK: 206 return therm->bios_sensor.thrs_down_clock.temp; 207 case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST: 208 return therm->bios_sensor.thrs_down_clock.hysteresis; 209 case NVKM_THERM_ATTR_THRS_CRITICAL: 210 return therm->bios_sensor.thrs_critical.temp; 211 case NVKM_THERM_ATTR_THRS_CRITICAL_HYST: 212 return therm->bios_sensor.thrs_critical.hysteresis; 213 case NVKM_THERM_ATTR_THRS_SHUTDOWN: 214 return therm->bios_sensor.thrs_shutdown.temp; 215 case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST: 216 return therm->bios_sensor.thrs_shutdown.hysteresis; 217 } 218 219 return -EINVAL; 220 } 221 222 int 223 nvkm_therm_attr_set(struct nvkm_therm *obj, 224 enum nvkm_therm_attr_type type, int value) 225 { 226 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 227 228 switch (type) { 229 case NVKM_THERM_ATTR_FAN_MIN_DUTY: 230 if (value < 0) 231 value = 0; 232 if (value > therm->fan->bios.max_duty) 233 value = therm->fan->bios.max_duty; 234 therm->fan->bios.min_duty = value; 235 return 0; 236 case NVKM_THERM_ATTR_FAN_MAX_DUTY: 237 if (value < 0) 238 value = 0; 239 if (value < therm->fan->bios.min_duty) 240 value = therm->fan->bios.min_duty; 241 therm->fan->bios.max_duty = value; 242 return 0; 243 case NVKM_THERM_ATTR_FAN_MODE: 244 return nvkm_therm_fan_mode(&therm->base, value); 245 case NVKM_THERM_ATTR_THRS_FAN_BOOST: 246 therm->bios_sensor.thrs_fan_boost.temp = value; 247 therm->sensor.program_alarms(&therm->base); 248 return 0; 249 case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST: 250 therm->bios_sensor.thrs_fan_boost.hysteresis = value; 251 therm->sensor.program_alarms(&therm->base); 252 return 0; 253 case NVKM_THERM_ATTR_THRS_DOWN_CLK: 254 therm->bios_sensor.thrs_down_clock.temp = value; 255 therm->sensor.program_alarms(&therm->base); 256 return 0; 257 case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST: 258 therm->bios_sensor.thrs_down_clock.hysteresis = value; 259 therm->sensor.program_alarms(&therm->base); 260 return 0; 261 case NVKM_THERM_ATTR_THRS_CRITICAL: 262 therm->bios_sensor.thrs_critical.temp = value; 263 therm->sensor.program_alarms(&therm->base); 264 return 0; 265 case NVKM_THERM_ATTR_THRS_CRITICAL_HYST: 266 therm->bios_sensor.thrs_critical.hysteresis = value; 267 therm->sensor.program_alarms(&therm->base); 268 return 0; 269 case NVKM_THERM_ATTR_THRS_SHUTDOWN: 270 therm->bios_sensor.thrs_shutdown.temp = value; 271 therm->sensor.program_alarms(&therm->base); 272 return 0; 273 case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST: 274 therm->bios_sensor.thrs_shutdown.hysteresis = value; 275 therm->sensor.program_alarms(&therm->base); 276 return 0; 277 } 278 279 return -EINVAL; 280 } 281 282 int 283 _nvkm_therm_init(struct nvkm_object *object) 284 { 285 struct nvkm_therm_priv *therm = (void *)object; 286 int ret; 287 288 ret = nvkm_subdev_init(&therm->base.subdev); 289 if (ret) 290 return ret; 291 292 if (therm->suspend >= 0) { 293 /* restore the pwm value only when on manual or auto mode */ 294 if (therm->suspend > 0) 295 nvkm_therm_fan_set(&therm->base, true, therm->fan->percent); 296 297 nvkm_therm_fan_mode(&therm->base, therm->suspend); 298 } 299 nvkm_therm_sensor_init(&therm->base); 300 nvkm_therm_fan_init(&therm->base); 301 return 0; 302 } 303 304 int 305 _nvkm_therm_fini(struct nvkm_object *object, bool suspend) 306 { 307 struct nvkm_therm_priv *therm = (void *)object; 308 309 nvkm_therm_fan_fini(&therm->base, suspend); 310 nvkm_therm_sensor_fini(&therm->base, suspend); 311 if (suspend) { 312 therm->suspend = therm->mode; 313 therm->mode = NVKM_THERM_CTRL_NONE; 314 } 315 316 return nvkm_subdev_fini(&therm->base.subdev, suspend); 317 } 318 319 int 320 nvkm_therm_create_(struct nvkm_object *parent, struct nvkm_object *engine, 321 struct nvkm_oclass *oclass, int length, void **pobject) 322 { 323 struct nvkm_therm_priv *therm; 324 int ret; 325 326 ret = nvkm_subdev_create_(parent, engine, oclass, 0, "PTHERM", 327 "therm", length, pobject); 328 therm = *pobject; 329 if (ret) 330 return ret; 331 332 nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm); 333 spin_lock_init(&therm->lock); 334 spin_lock_init(&therm->sensor.alarm_program_lock); 335 336 therm->base.fan_get = nvkm_therm_fan_user_get; 337 therm->base.fan_set = nvkm_therm_fan_user_set; 338 therm->base.fan_sense = nvkm_therm_fan_sense; 339 therm->base.attr_get = nvkm_therm_attr_get; 340 therm->base.attr_set = nvkm_therm_attr_set; 341 therm->mode = therm->suspend = -1; /* undefined */ 342 return 0; 343 } 344 345 int 346 nvkm_therm_preinit(struct nvkm_therm *therm) 347 { 348 nvkm_therm_sensor_ctor(therm); 349 nvkm_therm_ic_ctor(therm); 350 nvkm_therm_fan_ctor(therm); 351 352 nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO); 353 nvkm_therm_sensor_preinit(therm); 354 return 0; 355 } 356 357 void 358 _nvkm_therm_dtor(struct nvkm_object *object) 359 { 360 struct nvkm_therm_priv *therm = (void *)object; 361 kfree(therm->fan); 362 nvkm_subdev_destroy(&therm->base.subdev); 363 } 364