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 <nvkm/core/option.h> 25 #include "priv.h" 26 27 int 28 nvkm_therm_temp_get(struct nvkm_therm *therm) 29 { 30 if (therm->func->temp_get) 31 return therm->func->temp_get(therm); 32 return -ENODEV; 33 } 34 35 static int 36 nvkm_therm_update_trip(struct nvkm_therm *therm) 37 { 38 struct nvbios_therm_trip_point *trip = therm->fan->bios.trip, 39 *cur_trip = NULL, 40 *last_trip = therm->last_trip; 41 u8 temp = therm->func->temp_get(therm); 42 u16 duty, i; 43 44 /* look for the trip point corresponding to the current temperature */ 45 cur_trip = NULL; 46 for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) { 47 if (temp >= trip[i].temp) 48 cur_trip = &trip[i]; 49 } 50 51 /* account for the hysteresis cycle */ 52 if (last_trip && temp <= (last_trip->temp) && 53 temp > (last_trip->temp - last_trip->hysteresis)) 54 cur_trip = last_trip; 55 56 if (cur_trip) { 57 duty = cur_trip->fan_duty; 58 therm->last_trip = cur_trip; 59 } else { 60 duty = 0; 61 therm->last_trip = NULL; 62 } 63 64 return duty; 65 } 66 67 static int 68 nvkm_therm_compute_linear_duty(struct nvkm_therm *therm, u8 linear_min_temp, 69 u8 linear_max_temp) 70 { 71 u8 temp = therm->func->temp_get(therm); 72 u16 duty; 73 74 /* handle the non-linear part first */ 75 if (temp < linear_min_temp) 76 return therm->fan->bios.min_duty; 77 else if (temp > linear_max_temp) 78 return therm->fan->bios.max_duty; 79 80 /* we are in the linear zone */ 81 duty = (temp - linear_min_temp); 82 duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty); 83 duty /= (linear_max_temp - linear_min_temp); 84 duty += therm->fan->bios.min_duty; 85 return duty; 86 } 87 88 static int 89 nvkm_therm_update_linear(struct nvkm_therm *therm) 90 { 91 u8 min = therm->fan->bios.linear_min_temp; 92 u8 max = therm->fan->bios.linear_max_temp; 93 return nvkm_therm_compute_linear_duty(therm, min, max); 94 } 95 96 static int 97 nvkm_therm_update_linear_fallback(struct nvkm_therm *therm) 98 { 99 u8 max = therm->bios_sensor.thrs_fan_boost.temp; 100 return nvkm_therm_compute_linear_duty(therm, 30, max); 101 } 102 103 static void 104 nvkm_therm_update(struct nvkm_therm *therm, int mode) 105 { 106 struct nvkm_subdev *subdev = &therm->subdev; 107 struct nvkm_timer *tmr = subdev->device->timer; 108 unsigned long flags; 109 bool immd = true; 110 bool poll = true; 111 int duty = -1; 112 113 spin_lock_irqsave(&therm->lock, flags); 114 if (mode < 0) 115 mode = therm->mode; 116 therm->mode = mode; 117 118 switch (mode) { 119 case NVKM_THERM_CTRL_MANUAL: 120 nvkm_timer_alarm(tmr, 0, &therm->alarm); 121 duty = nvkm_therm_fan_get(therm); 122 if (duty < 0) 123 duty = 100; 124 poll = false; 125 break; 126 case NVKM_THERM_CTRL_AUTO: 127 switch(therm->fan->bios.fan_mode) { 128 case NVBIOS_THERM_FAN_TRIP: 129 duty = nvkm_therm_update_trip(therm); 130 break; 131 case NVBIOS_THERM_FAN_LINEAR: 132 duty = nvkm_therm_update_linear(therm); 133 break; 134 case NVBIOS_THERM_FAN_OTHER: 135 if (therm->cstate) 136 duty = therm->cstate; 137 else 138 duty = nvkm_therm_update_linear_fallback(therm); 139 poll = false; 140 break; 141 } 142 immd = false; 143 break; 144 case NVKM_THERM_CTRL_NONE: 145 default: 146 nvkm_timer_alarm(tmr, 0, &therm->alarm); 147 poll = false; 148 } 149 150 if (poll) 151 nvkm_timer_alarm(tmr, 1000000000ULL, &therm->alarm); 152 spin_unlock_irqrestore(&therm->lock, flags); 153 154 if (duty >= 0) { 155 nvkm_debug(subdev, "FAN target request: %d%%\n", duty); 156 nvkm_therm_fan_set(therm, immd, duty); 157 } 158 } 159 160 int 161 nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir) 162 { 163 struct nvkm_subdev *subdev = &therm->subdev; 164 if (!dir || (dir < 0 && fan < therm->cstate) || 165 (dir > 0 && fan > therm->cstate)) { 166 nvkm_debug(subdev, "default fan speed -> %d%%\n", fan); 167 therm->cstate = fan; 168 nvkm_therm_update(therm, -1); 169 } 170 return 0; 171 } 172 173 static void 174 nvkm_therm_alarm(struct nvkm_alarm *alarm) 175 { 176 struct nvkm_therm *therm = 177 container_of(alarm, struct nvkm_therm, alarm); 178 nvkm_therm_update(therm, -1); 179 } 180 181 int 182 nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode) 183 { 184 struct nvkm_subdev *subdev = &therm->subdev; 185 struct nvkm_device *device = subdev->device; 186 static const char *name[] = { 187 "disabled", 188 "manual", 189 "automatic" 190 }; 191 192 /* The default PPWR ucode on fermi interferes with fan management */ 193 if ((mode >= ARRAY_SIZE(name)) || 194 (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 && 195 !device->pmu)) 196 return -EINVAL; 197 198 /* do not allow automatic fan management if the thermal sensor is 199 * not available */ 200 if (mode == NVKM_THERM_CTRL_AUTO && 201 therm->func->temp_get(therm) < 0) 202 return -EINVAL; 203 204 if (therm->mode == mode) 205 return 0; 206 207 nvkm_debug(subdev, "fan management: %s\n", name[mode]); 208 nvkm_therm_update(therm, mode); 209 return 0; 210 } 211 212 int 213 nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type) 214 { 215 switch (type) { 216 case NVKM_THERM_ATTR_FAN_MIN_DUTY: 217 return therm->fan->bios.min_duty; 218 case NVKM_THERM_ATTR_FAN_MAX_DUTY: 219 return therm->fan->bios.max_duty; 220 case NVKM_THERM_ATTR_FAN_MODE: 221 return therm->mode; 222 case NVKM_THERM_ATTR_THRS_FAN_BOOST: 223 return therm->bios_sensor.thrs_fan_boost.temp; 224 case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST: 225 return therm->bios_sensor.thrs_fan_boost.hysteresis; 226 case NVKM_THERM_ATTR_THRS_DOWN_CLK: 227 return therm->bios_sensor.thrs_down_clock.temp; 228 case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST: 229 return therm->bios_sensor.thrs_down_clock.hysteresis; 230 case NVKM_THERM_ATTR_THRS_CRITICAL: 231 return therm->bios_sensor.thrs_critical.temp; 232 case NVKM_THERM_ATTR_THRS_CRITICAL_HYST: 233 return therm->bios_sensor.thrs_critical.hysteresis; 234 case NVKM_THERM_ATTR_THRS_SHUTDOWN: 235 return therm->bios_sensor.thrs_shutdown.temp; 236 case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST: 237 return therm->bios_sensor.thrs_shutdown.hysteresis; 238 } 239 240 return -EINVAL; 241 } 242 243 int 244 nvkm_therm_attr_set(struct nvkm_therm *therm, 245 enum nvkm_therm_attr_type type, int value) 246 { 247 switch (type) { 248 case NVKM_THERM_ATTR_FAN_MIN_DUTY: 249 if (value < 0) 250 value = 0; 251 if (value > therm->fan->bios.max_duty) 252 value = therm->fan->bios.max_duty; 253 therm->fan->bios.min_duty = value; 254 return 0; 255 case NVKM_THERM_ATTR_FAN_MAX_DUTY: 256 if (value < 0) 257 value = 0; 258 if (value < therm->fan->bios.min_duty) 259 value = therm->fan->bios.min_duty; 260 therm->fan->bios.max_duty = value; 261 return 0; 262 case NVKM_THERM_ATTR_FAN_MODE: 263 return nvkm_therm_fan_mode(therm, value); 264 case NVKM_THERM_ATTR_THRS_FAN_BOOST: 265 therm->bios_sensor.thrs_fan_boost.temp = value; 266 therm->func->program_alarms(therm); 267 return 0; 268 case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST: 269 therm->bios_sensor.thrs_fan_boost.hysteresis = value; 270 therm->func->program_alarms(therm); 271 return 0; 272 case NVKM_THERM_ATTR_THRS_DOWN_CLK: 273 therm->bios_sensor.thrs_down_clock.temp = value; 274 therm->func->program_alarms(therm); 275 return 0; 276 case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST: 277 therm->bios_sensor.thrs_down_clock.hysteresis = value; 278 therm->func->program_alarms(therm); 279 return 0; 280 case NVKM_THERM_ATTR_THRS_CRITICAL: 281 therm->bios_sensor.thrs_critical.temp = value; 282 therm->func->program_alarms(therm); 283 return 0; 284 case NVKM_THERM_ATTR_THRS_CRITICAL_HYST: 285 therm->bios_sensor.thrs_critical.hysteresis = value; 286 therm->func->program_alarms(therm); 287 return 0; 288 case NVKM_THERM_ATTR_THRS_SHUTDOWN: 289 therm->bios_sensor.thrs_shutdown.temp = value; 290 therm->func->program_alarms(therm); 291 return 0; 292 case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST: 293 therm->bios_sensor.thrs_shutdown.hysteresis = value; 294 therm->func->program_alarms(therm); 295 return 0; 296 } 297 298 return -EINVAL; 299 } 300 301 void 302 nvkm_therm_clkgate_enable(struct nvkm_therm *therm) 303 { 304 if (!therm || !therm->func->clkgate_enable || !therm->clkgating_enabled) 305 return; 306 307 nvkm_debug(&therm->subdev, 308 "Enabling clockgating\n"); 309 therm->func->clkgate_enable(therm); 310 } 311 312 void 313 nvkm_therm_clkgate_fini(struct nvkm_therm *therm, bool suspend) 314 { 315 if (!therm || !therm->func->clkgate_fini || !therm->clkgating_enabled) 316 return; 317 318 nvkm_debug(&therm->subdev, 319 "Preparing clockgating for %s\n", 320 suspend ? "suspend" : "fini"); 321 therm->func->clkgate_fini(therm, suspend); 322 } 323 324 static void 325 nvkm_therm_clkgate_oneinit(struct nvkm_therm *therm) 326 { 327 if (!therm->func->clkgate_enable || !therm->clkgating_enabled) 328 return; 329 330 nvkm_info(&therm->subdev, "Clockgating enabled\n"); 331 } 332 333 static void 334 nvkm_therm_intr(struct nvkm_subdev *subdev) 335 { 336 struct nvkm_therm *therm = nvkm_therm(subdev); 337 if (therm->func->intr) 338 therm->func->intr(therm); 339 } 340 341 static int 342 nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend) 343 { 344 struct nvkm_therm *therm = nvkm_therm(subdev); 345 346 if (therm->func->fini) 347 therm->func->fini(therm); 348 349 nvkm_therm_fan_fini(therm, suspend); 350 nvkm_therm_sensor_fini(therm, suspend); 351 352 if (suspend) { 353 therm->suspend = therm->mode; 354 therm->mode = NVKM_THERM_CTRL_NONE; 355 } 356 357 return 0; 358 } 359 360 static int 361 nvkm_therm_oneinit(struct nvkm_subdev *subdev) 362 { 363 struct nvkm_therm *therm = nvkm_therm(subdev); 364 nvkm_therm_sensor_ctor(therm); 365 nvkm_therm_ic_ctor(therm); 366 nvkm_therm_fan_ctor(therm); 367 nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO); 368 nvkm_therm_sensor_preinit(therm); 369 nvkm_therm_clkgate_oneinit(therm); 370 return 0; 371 } 372 373 static int 374 nvkm_therm_init(struct nvkm_subdev *subdev) 375 { 376 struct nvkm_therm *therm = nvkm_therm(subdev); 377 378 if (therm->func->init) 379 therm->func->init(therm); 380 381 if (therm->suspend >= 0) { 382 /* restore the pwm value only when on manual or auto mode */ 383 if (therm->suspend > 0) 384 nvkm_therm_fan_set(therm, true, therm->fan->percent); 385 386 nvkm_therm_fan_mode(therm, therm->suspend); 387 } 388 389 nvkm_therm_sensor_init(therm); 390 nvkm_therm_fan_init(therm); 391 return 0; 392 } 393 394 void 395 nvkm_therm_clkgate_init(struct nvkm_therm *therm, 396 const struct nvkm_therm_clkgate_pack *p) 397 { 398 if (!therm || !therm->func->clkgate_init || !therm->clkgating_enabled) 399 return; 400 401 therm->func->clkgate_init(therm, p); 402 } 403 404 static void * 405 nvkm_therm_dtor(struct nvkm_subdev *subdev) 406 { 407 struct nvkm_therm *therm = nvkm_therm(subdev); 408 kfree(therm->fan); 409 return therm; 410 } 411 412 static const struct nvkm_subdev_func 413 nvkm_therm = { 414 .dtor = nvkm_therm_dtor, 415 .oneinit = nvkm_therm_oneinit, 416 .init = nvkm_therm_init, 417 .fini = nvkm_therm_fini, 418 .intr = nvkm_therm_intr, 419 }; 420 421 void 422 nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device, 423 int index, const struct nvkm_therm_func *func) 424 { 425 nvkm_subdev_ctor(&nvkm_therm, device, index, &therm->subdev); 426 therm->func = func; 427 428 nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm); 429 spin_lock_init(&therm->lock); 430 spin_lock_init(&therm->sensor.alarm_program_lock); 431 432 therm->fan_get = nvkm_therm_fan_user_get; 433 therm->fan_set = nvkm_therm_fan_user_set; 434 therm->attr_get = nvkm_therm_attr_get; 435 therm->attr_set = nvkm_therm_attr_set; 436 therm->mode = therm->suspend = -1; /* undefined */ 437 438 therm->clkgating_enabled = nvkm_boolopt(device->cfgopt, 439 "NvPmEnableGating", false); 440 } 441 442 int 443 nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device, 444 int index, struct nvkm_therm **ptherm) 445 { 446 struct nvkm_therm *therm; 447 448 if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL))) 449 return -ENOMEM; 450 451 nvkm_therm_ctor(therm, device, index, func); 452 return 0; 453 } 454