drivers/gpu/drm/nouveau/nouveau_pm.c

   1 /*
   2  * Copyright 2010 Red Hat Inc.
   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: Ben Skeggs
  23  */
  24
  25 #include "drmP.h"
  26
  27 #include "nouveau_drv.h"
  28 #include "nouveau_pm.h"
  29 #include "nouveau_gpio.h"
  30
  31 #ifdef CONFIG_ACPI
  32 #include <linux/acpi.h>
  33 #endif
  34 #include <linux/power_supply.h>
  35 #include <linux/hwmon.h>
  36 #include <linux/hwmon-sysfs.h>
  37
  38 static int
  39 nouveau_pwmfan_get(struct drm_device *dev)
  40 {
  41         struct drm_nouveau_private *dev_priv = dev->dev_private;
  42         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
  43         struct gpio_func gpio;
  44         u32 divs, duty;
  45         int ret;
  46
  47         if (!pm->pwm_get)
  48                 return -ENODEV;
  49
  50         ret = nouveau_gpio_find(dev, 0, DCB_GPIO_PWM_FAN, 0xff, &gpio);
  51         if (ret == 0) {
  52                 ret = pm->pwm_get(dev, gpio.line, &divs, &duty);
  53                 if (ret == 0 && divs) {
  54                         divs = max(divs, duty);
  55                         if (dev_priv->card_type <= NV_40 || (gpio.log[0] & 1))
  56                                 duty = divs - duty;
  57                         return (duty * 100) / divs;
  58                 }
  59
  60                 return nouveau_gpio_func_get(dev, gpio.func) * 100;
  61         }
  62
  63         return -ENODEV;
  64 }
  65
  66 static int
  67 nouveau_pwmfan_set(struct drm_device *dev, int percent)
  68 {
  69         struct drm_nouveau_private *dev_priv = dev->dev_private;
  70         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
  71         struct gpio_func gpio;
  72         u32 divs, duty;
  73         int ret;
  74
  75         if (!pm->pwm_set)
  76                 return -ENODEV;
  77
  78         ret = nouveau_gpio_find(dev, 0, DCB_GPIO_PWM_FAN, 0xff, &gpio);
  79         if (ret == 0) {
  80                 divs = pm->fan.pwm_divisor;
  81                 if (pm->fan.pwm_freq) {
  82                         /*XXX: PNVIO clock more than likely... */
  83                         divs = 135000 / pm->fan.pwm_freq;
  84                         if (dev_priv->chipset < 0xa3)
  85                                 divs /= 4;
  86                 }
  87
  88                 duty = ((divs * percent) + 99) / 100;
  89                 if (dev_priv->card_type <= NV_40 || (gpio.log[0] & 1))
  90                         duty = divs - duty;
  91
  92                 ret = pm->pwm_set(dev, gpio.line, divs, duty);
  93                 if (!ret)
  94                         pm->fan.percent = percent;
  95                 return ret;
  96         }
  97
  98         return -ENODEV;
  99 }
 100
 101 static int
 102 nouveau_pm_perflvl_aux(struct drm_device *dev, struct nouveau_pm_level *perflvl,
 103                        struct nouveau_pm_level *a, struct nouveau_pm_level *b)
 104 {
 105         struct drm_nouveau_private *dev_priv = dev->dev_private;
 106         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 107         int ret;
 108
 109         /*XXX: not on all boards, we should control based on temperature
 110          *     on recent boards..  or maybe on some other factor we don't
 111          *     know about?
 112          */
 113         if (a->fanspeed && b->fanspeed && b->fanspeed > a->fanspeed) {
 114                 ret = nouveau_pwmfan_set(dev, perflvl->fanspeed);
 115                 if (ret && ret != -ENODEV) {
 116                         NV_ERROR(dev, "fanspeed set failed: %d\n", ret);
 117                         return ret;
 118                 }
 119         }
 120
 121         if (pm->voltage.supported && pm->voltage_set) {
 122                 if (perflvl->volt_min && b->volt_min > a->volt_min) {
 123                         ret = pm->voltage_set(dev, perflvl->volt_min);
 124                         if (ret) {
 125                                 NV_ERROR(dev, "voltage set failed: %d\n", ret);
 126                                 return ret;
 127                         }
 128                 }
 129         }
 130
 131         return 0;
 132 }
 133
 134 static int
 135 nouveau_pm_perflvl_set(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 136 {
 137         struct drm_nouveau_private *dev_priv = dev->dev_private;
 138         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 139         void *state;
 140         int ret;
 141
 142         if (perflvl == pm->cur)
 143                 return 0;
 144
 145         ret = nouveau_pm_perflvl_aux(dev, perflvl, pm->cur, perflvl);
 146         if (ret)
 147                 return ret;
 148
 149         state = pm->clocks_pre(dev, perflvl);
 150         if (IS_ERR(state)) {
 151                 ret = PTR_ERR(state);
 152                 goto error;
 153         }
 154         ret = pm->clocks_set(dev, state);
 155         if (ret)
 156                 goto error;
 157
 158         ret = nouveau_pm_perflvl_aux(dev, perflvl, perflvl, pm->cur);
 159         if (ret)
 160                 return ret;
 161
 162         pm->cur = perflvl;
 163         return 0;
 164
 165 error:
 166         /* restore the fan speed and voltage before leaving */
 167         nouveau_pm_perflvl_aux(dev, perflvl, perflvl, pm->cur);
 168         return ret;
 169 }
 170
 171 void
 172 nouveau_pm_trigger(struct drm_device *dev)
 173 {
 174         struct drm_nouveau_private *dev_priv = dev->dev_private;
 175         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 176         struct nouveau_pm_profile *profile = NULL;
 177         struct nouveau_pm_level *perflvl = NULL;
 178         int ret;
 179
 180         /* select power profile based on current power source */
 181         if (power_supply_is_system_supplied())
 182                 profile = pm->profile_ac;
 183         else
 184                 profile = pm->profile_dc;
 185
 186         if (profile != pm->profile) {
 187                 pm->profile->func->fini(pm->profile);
 188                 pm->profile = profile;
 189                 pm->profile->func->init(pm->profile);
 190         }
 191
 192         /* select performance level based on profile */
 193         perflvl = profile->func->select(profile);
 194
 195         /* change perflvl, if necessary */
 196         if (perflvl != pm->cur) {
 197                 struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
 198                 u64 time0 = ptimer->read(dev);
 199
 200                 NV_INFO(dev, "setting performance level: %d", perflvl->id);
 201                 ret = nouveau_pm_perflvl_set(dev, perflvl);
 202                 if (ret)
 203                         NV_INFO(dev, "> reclocking failed: %d\n\n", ret);
 204
 205                 NV_INFO(dev, "> reclocking took %lluns\n\n",
 206                              ptimer->read(dev) - time0);
 207         }
 208 }
 209
 210 static struct nouveau_pm_profile *
 211 profile_find(struct drm_device *dev, const char *string)
 212 {
 213         struct drm_nouveau_private *dev_priv = dev->dev_private;
 214         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 215         struct nouveau_pm_profile *profile;
 216
 217         list_for_each_entry(profile, &pm->profiles, head) {
 218                 if (!strncmp(profile->name, string, sizeof(profile->name)))
 219                         return profile;
 220         }
 221
 222         return NULL;
 223 }
 224
 225 static int
 226 nouveau_pm_profile_set(struct drm_device *dev, const char *profile)
 227 {
 228         struct drm_nouveau_private *dev_priv = dev->dev_private;
 229         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 230         struct nouveau_pm_profile *ac = NULL, *dc = NULL;
 231         char string[16], *cur = string, *ptr;
 232
 233         /* safety precaution, for now */
 234         if (nouveau_perflvl_wr != 7777)
 235                 return -EPERM;
 236
 237         strncpy(string, profile, sizeof(string));
 238         string[sizeof(string) - 1] = 0;
 239         if ((ptr = strchr(string, '\n')))
 240                 *ptr = '\0';
 241
 242         ptr = strsep(&cur, ",");
 243         if (ptr)
 244                 ac = profile_find(dev, ptr);
 245
 246         ptr = strsep(&cur, ",");
 247         if (ptr)
 248                 dc = profile_find(dev, ptr);
 249         else
 250                 dc = ac;
 251
 252         if (ac == NULL || dc == NULL)
 253                 return -EINVAL;
 254
 255         pm->profile_ac = ac;
 256         pm->profile_dc = dc;
 257         nouveau_pm_trigger(dev);
 258         return 0;
 259 }
 260
 261 static void
 262 nouveau_pm_static_dummy(struct nouveau_pm_profile *profile)
 263 {
 264 }
 265
 266 static struct nouveau_pm_level *
 267 nouveau_pm_static_select(struct nouveau_pm_profile *profile)
 268 {
 269         return container_of(profile, struct nouveau_pm_level, profile);
 270 }
 271
 272 const struct nouveau_pm_profile_func nouveau_pm_static_profile_func = {
 273         .destroy = nouveau_pm_static_dummy,
 274         .init = nouveau_pm_static_dummy,
 275         .fini = nouveau_pm_static_dummy,
 276         .select = nouveau_pm_static_select,
 277 };
 278
 279 static int
 280 nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 281 {
 282         struct drm_nouveau_private *dev_priv = dev->dev_private;
 283         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 284         int ret;
 285
 286         memset(perflvl, 0, sizeof(*perflvl));
 287
 288         if (pm->clocks_get) {
 289                 ret = pm->clocks_get(dev, perflvl);
 290                 if (ret)
 291                         return ret;
 292         }
 293
 294         if (pm->voltage.supported && pm->voltage_get) {
 295                 ret = pm->voltage_get(dev);
 296                 if (ret > 0) {
 297                         perflvl->volt_min = ret;
 298                         perflvl->volt_max = ret;
 299                 }
 300         }
 301
 302         ret = nouveau_pwmfan_get(dev);
 303         if (ret > 0)
 304                 perflvl->fanspeed = ret;
 305
 306         nouveau_mem_timing_read(dev, &perflvl->timing);
 307         return 0;
 308 }
 309
 310 static void
 311 nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
 312 {
 313         char c[16], s[16], v[32], f[16], m[16];
 314
 315         c[0] = '\0';
 316         if (perflvl->core)
 317                 snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
 318
 319         s[0] = '\0';
 320         if (perflvl->shader)
 321                 snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);
 322
 323         m[0] = '\0';
 324         if (perflvl->memory)
 325                 snprintf(m, sizeof(m), " memory %dMHz", perflvl->memory / 1000);
 326
 327         v[0] = '\0';
 328         if (perflvl->volt_min && perflvl->volt_min != perflvl->volt_max) {
 329                 snprintf(v, sizeof(v), " voltage %dmV-%dmV",
 330                          perflvl->volt_min / 1000, perflvl->volt_max / 1000);
 331         } else
 332         if (perflvl->volt_min) {
 333                 snprintf(v, sizeof(v), " voltage %dmV",
 334                          perflvl->volt_min / 1000);
 335         }
 336
 337         f[0] = '\0';
 338         if (perflvl->fanspeed)
 339                 snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
 340
 341         snprintf(ptr, len, "%s%s%s%s%s\n", c, s, m, v, f);
 342 }
 343
 344 static ssize_t
 345 nouveau_pm_get_perflvl_info(struct device *d,
 346                             struct device_attribute *a, char *buf)
 347 {
 348         struct nouveau_pm_level *perflvl =
 349                 container_of(a, struct nouveau_pm_level, dev_attr);
 350         char *ptr = buf;
 351         int len = PAGE_SIZE;
 352
 353         snprintf(ptr, len, "%d:", perflvl->id);
 354         ptr += strlen(buf);
 355         len -= strlen(buf);
 356
 357         nouveau_pm_perflvl_info(perflvl, ptr, len);
 358         return strlen(buf);
 359 }
 360
 361 static ssize_t
 362 nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
 363 {
 364         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 365         struct drm_nouveau_private *dev_priv = dev->dev_private;
 366         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 367         struct nouveau_pm_level cur;
 368         int len = PAGE_SIZE, ret;
 369         char *ptr = buf;
 370
 371         snprintf(ptr, len, "profile: %s, %s\nc:",
 372                  pm->profile_ac->name, pm->profile_dc->name);
 373         ptr += strlen(buf);
 374         len -= strlen(buf);
 375
 376         ret = nouveau_pm_perflvl_get(dev, &cur);
 377         if (ret == 0)
 378                 nouveau_pm_perflvl_info(&cur, ptr, len);
 379         return strlen(buf);
 380 }
 381
 382 static ssize_t
 383 nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
 384                        const char *buf, size_t count)
 385 {
 386         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 387         int ret;
 388
 389         ret = nouveau_pm_profile_set(dev, buf);
 390         if (ret)
 391                 return ret;
 392         return strlen(buf);
 393 }
 394
 395 static DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
 396                    nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);
 397
 398 static int
 399 nouveau_sysfs_init(struct drm_device *dev)
 400 {
 401         struct drm_nouveau_private *dev_priv = dev->dev_private;
 402         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 403         struct device *d = &dev->pdev->dev;
 404         int ret, i;
 405
 406         ret = device_create_file(d, &dev_attr_performance_level);
 407         if (ret)
 408                 return ret;
 409
 410         for (i = 0; i < pm->nr_perflvl; i++) {
 411                 struct nouveau_pm_level *perflvl = &pm->perflvl[i];
 412
 413                 perflvl->dev_attr.attr.name = perflvl->name;
 414                 perflvl->dev_attr.attr.mode = S_IRUGO;
 415                 perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
 416                 perflvl->dev_attr.store = NULL;
 417                 sysfs_attr_init(&perflvl->dev_attr.attr);
 418
 419                 ret = device_create_file(d, &perflvl->dev_attr);
 420                 if (ret) {
 421                         NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
 422                                  perflvl->id, i);
 423                         perflvl->dev_attr.attr.name = NULL;
 424                         nouveau_pm_fini(dev);
 425                         return ret;
 426                 }
 427         }
 428
 429         return 0;
 430 }
 431
 432 static void
 433 nouveau_sysfs_fini(struct drm_device *dev)
 434 {
 435         struct drm_nouveau_private *dev_priv = dev->dev_private;
 436         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 437         struct device *d = &dev->pdev->dev;
 438         int i;
 439
 440         device_remove_file(d, &dev_attr_performance_level);
 441         for (i = 0; i < pm->nr_perflvl; i++) {
 442                 struct nouveau_pm_level *pl = &pm->perflvl[i];
 443
 444                 if (!pl->dev_attr.attr.name)
 445                         break;
 446
 447                 device_remove_file(d, &pl->dev_attr);
 448         }
 449 }
 450
 451 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 452 static ssize_t
 453 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
 454 {
 455         struct drm_device *dev = dev_get_drvdata(d);
 456         struct drm_nouveau_private *dev_priv = dev->dev_private;
 457         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 458
 459         return snprintf(buf, PAGE_SIZE, "%d\n", pm->temp_get(dev)*1000);
 460 }
 461 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
 462                                                   NULL, 0);
 463
 464 static ssize_t
 465 nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
 466 {
 467         struct drm_device *dev = dev_get_drvdata(d);
 468         struct drm_nouveau_private *dev_priv = dev->dev_private;
 469         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 470         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 471
 472         return snprintf(buf, PAGE_SIZE, "%d\n", temp->down_clock*1000);
 473 }
 474 static ssize_t
 475 nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
 476                                                 const char *buf, size_t count)
 477 {
 478         struct drm_device *dev = dev_get_drvdata(d);
 479         struct drm_nouveau_private *dev_priv = dev->dev_private;
 480         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 481         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 482         long value;
 483
 484         if (kstrtol(buf, 10, &value) == -EINVAL)
 485                 return count;
 486
 487         temp->down_clock = value/1000;
 488
 489         nouveau_temp_safety_checks(dev);
 490
 491         return count;
 492 }
 493 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
 494                                                   nouveau_hwmon_set_max_temp,
 495                                                   0);
 496
 497 static ssize_t
 498 nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
 499                                                         char *buf)
 500 {
 501         struct drm_device *dev = dev_get_drvdata(d);
 502         struct drm_nouveau_private *dev_priv = dev->dev_private;
 503         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 504         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 505
 506         return snprintf(buf, PAGE_SIZE, "%d\n", temp->critical*1000);
 507 }
 508 static ssize_t
 509 nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
 510                                                             const char *buf,
 511                                                                 size_t count)
 512 {
 513         struct drm_device *dev = dev_get_drvdata(d);
 514         struct drm_nouveau_private *dev_priv = dev->dev_private;
 515         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 516         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 517         long value;
 518
 519         if (kstrtol(buf, 10, &value) == -EINVAL)
 520                 return count;
 521
 522         temp->critical = value/1000;
 523
 524         nouveau_temp_safety_checks(dev);
 525
 526         return count;
 527 }
 528 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
 529                                                 nouveau_hwmon_critical_temp,
 530                                                 nouveau_hwmon_set_critical_temp,
 531                                                 0);
 532
 533 static ssize_t nouveau_hwmon_show_name(struct device *dev,
 534                                       struct device_attribute *attr,
 535                                       char *buf)
 536 {
 537         return sprintf(buf, "nouveau\n");
 538 }
 539 static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
 540
 541 static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
 542                                       struct device_attribute *attr,
 543                                       char *buf)
 544 {
 545         return sprintf(buf, "1000\n");
 546 }
 547 static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
 548                                                 nouveau_hwmon_show_update_rate,
 549                                                 NULL, 0);
 550
 551 static ssize_t
 552 nouveau_hwmon_show_fan0_input(struct device *d, struct device_attribute *attr,
 553                               char *buf)
 554 {
 555         struct drm_device *dev = dev_get_drvdata(d);
 556         struct drm_nouveau_private *dev_priv = dev->dev_private;
 557         struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
 558         struct gpio_func gpio;
 559         u32 cycles, cur, prev;
 560         u64 start;
 561         int ret;
 562
 563         ret = nouveau_gpio_find(dev, 0, DCB_GPIO_FAN_SENSE, 0xff, &gpio);
 564         if (ret)
 565                 return ret;
 566
 567         /* Monitor the GPIO input 0x3b for 250ms.
 568          * When the fan spins, it changes the value of GPIO FAN_SENSE.
 569          * We get 4 changes (0 -> 1 -> 0 -> 1 -> [...]) per complete rotation.
 570          */
 571         start = ptimer->read(dev);
 572         prev = nouveau_gpio_sense(dev, 0, gpio.line);
 573         cycles = 0;
 574         do {
 575                 cur = nouveau_gpio_sense(dev, 0, gpio.line);
 576                 if (prev != cur) {
 577                         cycles++;
 578                         prev = cur;
 579                 }
 580
 581                 usleep_range(500, 1000); /* supports 0 < rpm < 7500 */
 582         } while (ptimer->read(dev) - start < 250000000);
 583
 584         /* interpolate to get rpm */
 585         return sprintf(buf, "%i\n", cycles / 4 * 4 * 60);
 586 }
 587 static SENSOR_DEVICE_ATTR(fan0_input, S_IRUGO, nouveau_hwmon_show_fan0_input,
 588                           NULL, 0);
 589
 590 static ssize_t
 591 nouveau_hwmon_get_pwm0(struct device *d, struct device_attribute *a, char *buf)
 592 {
 593         struct drm_device *dev = dev_get_drvdata(d);
 594         int ret;
 595
 596         ret = nouveau_pwmfan_get(dev);
 597         if (ret < 0)
 598                 return ret;
 599
 600         return sprintf(buf, "%i\n", ret);
 601 }
 602
 603 static ssize_t
 604 nouveau_hwmon_set_pwm0(struct device *d, struct device_attribute *a,
 605                        const char *buf, size_t count)
 606 {
 607         struct drm_device *dev = dev_get_drvdata(d);
 608         struct drm_nouveau_private *dev_priv = dev->dev_private;
 609         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 610         int ret = -ENODEV;
 611         long value;
 612
 613         if (nouveau_perflvl_wr != 7777)
 614                 return -EPERM;
 615
 616         if (kstrtol(buf, 10, &value) == -EINVAL)
 617                 return -EINVAL;
 618
 619         if (value < pm->fan.min_duty)
 620                 value = pm->fan.min_duty;
 621         if (value > pm->fan.max_duty)
 622                 value = pm->fan.max_duty;
 623
 624         ret = nouveau_pwmfan_set(dev, value);
 625         if (ret)
 626                 return ret;
 627
 628         return count;
 629 }
 630
 631 static SENSOR_DEVICE_ATTR(pwm0, S_IRUGO | S_IWUSR,
 632                           nouveau_hwmon_get_pwm0,
 633                           nouveau_hwmon_set_pwm0, 0);
 634
 635 static ssize_t
 636 nouveau_hwmon_get_pwm0_min(struct device *d,
 637                            struct device_attribute *a, char *buf)
 638 {
 639         struct drm_device *dev = dev_get_drvdata(d);
 640         struct drm_nouveau_private *dev_priv = dev->dev_private;
 641         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 642
 643         return sprintf(buf, "%i\n", pm->fan.min_duty);
 644 }
 645
 646 static ssize_t
 647 nouveau_hwmon_set_pwm0_min(struct device *d, struct device_attribute *a,
 648                            const char *buf, size_t count)
 649 {
 650         struct drm_device *dev = dev_get_drvdata(d);
 651         struct drm_nouveau_private *dev_priv = dev->dev_private;
 652         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 653         long value;
 654
 655         if (kstrtol(buf, 10, &value) == -EINVAL)
 656                 return -EINVAL;
 657
 658         if (value < 0)
 659                 value = 0;
 660
 661         if (pm->fan.max_duty - value < 10)
 662                 value = pm->fan.max_duty - 10;
 663
 664         if (value < 10)
 665                 pm->fan.min_duty = 10;
 666         else
 667                 pm->fan.min_duty = value;
 668
 669         return count;
 670 }
 671
 672 static SENSOR_DEVICE_ATTR(pwm0_min, S_IRUGO | S_IWUSR,
 673                           nouveau_hwmon_get_pwm0_min,
 674                           nouveau_hwmon_set_pwm0_min, 0);
 675
 676 static ssize_t
 677 nouveau_hwmon_get_pwm0_max(struct device *d,
 678                            struct device_attribute *a, char *buf)
 679 {
 680         struct drm_device *dev = dev_get_drvdata(d);
 681         struct drm_nouveau_private *dev_priv = dev->dev_private;
 682         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 683
 684         return sprintf(buf, "%i\n", pm->fan.max_duty);
 685 }
 686
 687 static ssize_t
 688 nouveau_hwmon_set_pwm0_max(struct device *d, struct device_attribute *a,
 689                            const char *buf, size_t count)
 690 {
 691         struct drm_device *dev = dev_get_drvdata(d);
 692         struct drm_nouveau_private *dev_priv = dev->dev_private;
 693         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 694         long value;
 695
 696         if (kstrtol(buf, 10, &value) == -EINVAL)
 697                 return -EINVAL;
 698
 699         if (value < 0)
 700                 value = 0;
 701
 702         if (value - pm->fan.min_duty < 10)
 703                 value = pm->fan.min_duty + 10;
 704
 705         if (value > 100)
 706                 pm->fan.max_duty = 100;
 707         else
 708                 pm->fan.max_duty = value;
 709
 710         return count;
 711 }
 712
 713 static SENSOR_DEVICE_ATTR(pwm0_max, S_IRUGO | S_IWUSR,
 714                           nouveau_hwmon_get_pwm0_max,
 715                           nouveau_hwmon_set_pwm0_max, 0);
 716
 717 static struct attribute *hwmon_attributes[] = {
 718         &sensor_dev_attr_temp1_input.dev_attr.attr,
 719         &sensor_dev_attr_temp1_max.dev_attr.attr,
 720         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 721         &sensor_dev_attr_name.dev_attr.attr,
 722         &sensor_dev_attr_update_rate.dev_attr.attr,
 723         NULL
 724 };
 725 static struct attribute *hwmon_fan_rpm_attributes[] = {
 726         &sensor_dev_attr_fan0_input.dev_attr.attr,
 727         NULL
 728 };
 729 static struct attribute *hwmon_pwm_fan_attributes[] = {
 730         &sensor_dev_attr_pwm0.dev_attr.attr,
 731         &sensor_dev_attr_pwm0_min.dev_attr.attr,
 732         &sensor_dev_attr_pwm0_max.dev_attr.attr,
 733         NULL
 734 };
 735
 736 static const struct attribute_group hwmon_attrgroup = {
 737         .attrs = hwmon_attributes,
 738 };
 739 static const struct attribute_group hwmon_fan_rpm_attrgroup = {
 740         .attrs = hwmon_fan_rpm_attributes,
 741 };
 742 static const struct attribute_group hwmon_pwm_fan_attrgroup = {
 743         .attrs = hwmon_pwm_fan_attributes,
 744 };
 745 #endif
 746
 747 static int
 748 nouveau_hwmon_init(struct drm_device *dev)
 749 {
 750         struct drm_nouveau_private *dev_priv = dev->dev_private;
 751         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 752 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 753         struct device *hwmon_dev;
 754         int ret = 0;
 755
 756         if (!pm->temp_get)
 757                 return -ENODEV;
 758
 759         hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 760         if (IS_ERR(hwmon_dev)) {
 761                 ret = PTR_ERR(hwmon_dev);
 762                 NV_ERROR(dev,
 763                         "Unable to register hwmon device: %d\n", ret);
 764                 return ret;
 765         }
 766         dev_set_drvdata(hwmon_dev, dev);
 767
 768         /* default sysfs entries */
 769         ret = sysfs_create_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 770         if (ret) {
 771                 if (ret)
 772                         goto error;
 773         }
 774
 775         /* if the card has a pwm fan */
 776         /*XXX: incorrect, need better detection for this, some boards have
 777          *     the gpio entries for pwm fan control even when there's no
 778          *     actual fan connected to it... therm table? */
 779         if (nouveau_pwmfan_get(dev) >= 0) {
 780                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 781                                          &hwmon_pwm_fan_attrgroup);
 782                 if (ret)
 783                         goto error;
 784         }
 785
 786         /* if the card can read the fan rpm */
 787         if (nouveau_gpio_func_valid(dev, DCB_GPIO_FAN_SENSE)) {
 788                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 789                                          &hwmon_fan_rpm_attrgroup);
 790                 if (ret)
 791                         goto error;
 792         }
 793
 794         pm->hwmon = hwmon_dev;
 795
 796         return 0;
 797
 798 error:
 799         NV_ERROR(dev, "Unable to create some hwmon sysfs files: %d\n", ret);
 800         hwmon_device_unregister(hwmon_dev);
 801         pm->hwmon = NULL;
 802         return ret;
 803 #else
 804         pm->hwmon = NULL;
 805         return 0;
 806 #endif
 807 }
 808
 809 static void
 810 nouveau_hwmon_fini(struct drm_device *dev)
 811 {
 812 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 813         struct drm_nouveau_private *dev_priv = dev->dev_private;
 814         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 815
 816         if (pm->hwmon) {
 817                 sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 818                 sysfs_remove_group(&dev->pdev->dev.kobj,
 819                                    &hwmon_pwm_fan_attrgroup);
 820                 sysfs_remove_group(&dev->pdev->dev.kobj,
 821                                    &hwmon_fan_rpm_attrgroup);
 822
 823                 hwmon_device_unregister(pm->hwmon);
 824         }
 825 #endif
 826 }
 827
 828 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 829 static int
 830 nouveau_pm_acpi_event(struct notifier_block *nb, unsigned long val, void *data)
 831 {
 832         struct drm_nouveau_private *dev_priv =
 833                 container_of(nb, struct drm_nouveau_private, engine.pm.acpi_nb);
 834         struct drm_device *dev = dev_priv->dev;
 835         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
 836
 837         if (strcmp(entry->device_class, "ac_adapter") == 0) {
 838                 bool ac = power_supply_is_system_supplied();
 839
 840                 NV_DEBUG(dev, "power supply changed: %s\n", ac ? "AC" : "DC");
 841                 nouveau_pm_trigger(dev);
 842         }
 843
 844         return NOTIFY_OK;
 845 }
 846 #endif
 847
 848 int
 849 nouveau_pm_init(struct drm_device *dev)
 850 {
 851         struct drm_nouveau_private *dev_priv = dev->dev_private;
 852         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 853         char info[256];
 854         int ret, i;
 855
 856         /* parse aux tables from vbios */
 857         nouveau_volt_init(dev);
 858         nouveau_temp_init(dev);
 859
 860         /* determine current ("boot") performance level */
 861         ret = nouveau_pm_perflvl_get(dev, &pm->boot);
 862         if (ret) {
 863                 NV_ERROR(dev, "failed to determine boot perflvl\n");
 864                 return ret;
 865         }
 866
 867         strncpy(pm->boot.name, "boot", 4);
 868         strncpy(pm->boot.profile.name, "boot", 4);
 869         pm->boot.profile.func = &nouveau_pm_static_profile_func;
 870
 871         INIT_LIST_HEAD(&pm->profiles);
 872         list_add(&pm->boot.profile.head, &pm->profiles);
 873
 874         pm->profile_ac = &pm->boot.profile;
 875         pm->profile_dc = &pm->boot.profile;
 876         pm->profile = &pm->boot.profile;
 877         pm->cur = &pm->boot;
 878
 879         /* add performance levels from vbios */
 880         nouveau_perf_init(dev);
 881
 882         /* display available performance levels */
 883         NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
 884         for (i = 0; i < pm->nr_perflvl; i++) {
 885                 nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
 886                 NV_INFO(dev, "%d:%s", pm->perflvl[i].id, info);
 887         }
 888
 889         nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
 890         NV_INFO(dev, "c:%s", info);
 891
 892         /* switch performance levels now if requested */
 893         if (nouveau_perflvl != NULL)
 894                 nouveau_pm_profile_set(dev, nouveau_perflvl);
 895
 896         /* determine the current fan speed */
 897         pm->fan.percent = nouveau_pwmfan_get(dev);
 898
 899         nouveau_sysfs_init(dev);
 900         nouveau_hwmon_init(dev);
 901 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 902         pm->acpi_nb.notifier_call = nouveau_pm_acpi_event;
 903         register_acpi_notifier(&pm->acpi_nb);
 904 #endif
 905
 906         return 0;
 907 }
 908
 909 void
 910 nouveau_pm_fini(struct drm_device *dev)
 911 {
 912         struct drm_nouveau_private *dev_priv = dev->dev_private;
 913         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 914         struct nouveau_pm_profile *profile, *tmp;
 915
 916         list_for_each_entry_safe(profile, tmp, &pm->profiles, head) {
 917                 list_del(&profile->head);
 918                 profile->func->destroy(profile);
 919         }
 920
 921         if (pm->cur != &pm->boot)
 922                 nouveau_pm_perflvl_set(dev, &pm->boot);
 923
 924         nouveau_temp_fini(dev);
 925         nouveau_perf_fini(dev);
 926         nouveau_volt_fini(dev);
 927
 928 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 929         unregister_acpi_notifier(&pm->acpi_nb);
 930 #endif
 931         nouveau_hwmon_fini(dev);
 932         nouveau_sysfs_fini(dev);
 933 }
 934
 935 void
 936 nouveau_pm_resume(struct drm_device *dev)
 937 {
 938         struct drm_nouveau_private *dev_priv = dev->dev_private;
 939         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 940         struct nouveau_pm_level *perflvl;
 941
 942         if (!pm->cur || pm->cur == &pm->boot)
 943                 return;
 944
 945         perflvl = pm->cur;
 946         pm->cur = &pm->boot;
 947         nouveau_pm_perflvl_set(dev, perflvl);
 948         nouveau_pwmfan_set(dev, pm->fan.percent);
 949 }