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         if ((ptr = strchr(string, '\n')))
 239                 *ptr = '\0';
 240
 241         ptr = strsep(&cur, ",");
 242         if (ptr)
 243                 ac = profile_find(dev, ptr);
 244
 245         ptr = strsep(&cur, ",");
 246         if (ptr)
 247                 dc = profile_find(dev, ptr);
 248         else
 249                 dc = ac;
 250
 251         if (ac == NULL || dc == NULL)
 252                 return -EINVAL;
 253
 254         pm->profile_ac = ac;
 255         pm->profile_dc = dc;
 256         nouveau_pm_trigger(dev);
 257         return 0;
 258 }
 259
 260 static void
 261 nouveau_pm_static_dummy(struct nouveau_pm_profile *profile)
 262 {
 263 }
 264
 265 static struct nouveau_pm_level *
 266 nouveau_pm_static_select(struct nouveau_pm_profile *profile)
 267 {
 268         return container_of(profile, struct nouveau_pm_level, profile);
 269 }
 270
 271 const struct nouveau_pm_profile_func nouveau_pm_static_profile_func = {
 272         .destroy = nouveau_pm_static_dummy,
 273         .init = nouveau_pm_static_dummy,
 274         .fini = nouveau_pm_static_dummy,
 275         .select = nouveau_pm_static_select,
 276 };
 277
 278 static int
 279 nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 280 {
 281         struct drm_nouveau_private *dev_priv = dev->dev_private;
 282         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 283         int ret;
 284
 285         memset(perflvl, 0, sizeof(*perflvl));
 286
 287         if (pm->clocks_get) {
 288                 ret = pm->clocks_get(dev, perflvl);
 289                 if (ret)
 290                         return ret;
 291         }
 292
 293         if (pm->voltage.supported && pm->voltage_get) {
 294                 ret = pm->voltage_get(dev);
 295                 if (ret > 0) {
 296                         perflvl->volt_min = ret;
 297                         perflvl->volt_max = ret;
 298                 }
 299         }
 300
 301         ret = nouveau_pwmfan_get(dev);
 302         if (ret > 0)
 303                 perflvl->fanspeed = ret;
 304
 305         nouveau_mem_timing_read(dev, &perflvl->timing);
 306         return 0;
 307 }
 308
 309 static void
 310 nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
 311 {
 312         char c[16], s[16], v[32], f[16], m[16];
 313
 314         c[0] = '\0';
 315         if (perflvl->core)
 316                 snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
 317
 318         s[0] = '\0';
 319         if (perflvl->shader)
 320                 snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);
 321
 322         m[0] = '\0';
 323         if (perflvl->memory)
 324                 snprintf(m, sizeof(m), " memory %dMHz", perflvl->memory / 1000);
 325
 326         v[0] = '\0';
 327         if (perflvl->volt_min && perflvl->volt_min != perflvl->volt_max) {
 328                 snprintf(v, sizeof(v), " voltage %dmV-%dmV",
 329                          perflvl->volt_min / 1000, perflvl->volt_max / 1000);
 330         } else
 331         if (perflvl->volt_min) {
 332                 snprintf(v, sizeof(v), " voltage %dmV",
 333                          perflvl->volt_min / 1000);
 334         }
 335
 336         f[0] = '\0';
 337         if (perflvl->fanspeed)
 338                 snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
 339
 340         snprintf(ptr, len, "%s%s%s%s%s\n", c, s, m, v, f);
 341 }
 342
 343 static ssize_t
 344 nouveau_pm_get_perflvl_info(struct device *d,
 345                             struct device_attribute *a, char *buf)
 346 {
 347         struct nouveau_pm_level *perflvl =
 348                 container_of(a, struct nouveau_pm_level, dev_attr);
 349         char *ptr = buf;
 350         int len = PAGE_SIZE;
 351
 352         snprintf(ptr, len, "%d:", perflvl->id);
 353         ptr += strlen(buf);
 354         len -= strlen(buf);
 355
 356         nouveau_pm_perflvl_info(perflvl, ptr, len);
 357         return strlen(buf);
 358 }
 359
 360 static ssize_t
 361 nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
 362 {
 363         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 364         struct drm_nouveau_private *dev_priv = dev->dev_private;
 365         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 366         struct nouveau_pm_level cur;
 367         int len = PAGE_SIZE, ret;
 368         char *ptr = buf;
 369
 370         snprintf(ptr, len, "profile: %s, %s\nc:",
 371                  pm->profile_ac->name, pm->profile_dc->name);
 372         ptr += strlen(buf);
 373         len -= strlen(buf);
 374
 375         ret = nouveau_pm_perflvl_get(dev, &cur);
 376         if (ret == 0)
 377                 nouveau_pm_perflvl_info(&cur, ptr, len);
 378         return strlen(buf);
 379 }
 380
 381 static ssize_t
 382 nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
 383                        const char *buf, size_t count)
 384 {
 385         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 386         int ret;
 387
 388         ret = nouveau_pm_profile_set(dev, buf);
 389         if (ret)
 390                 return ret;
 391         return strlen(buf);
 392 }
 393
 394 static DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
 395                    nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);
 396
 397 static int
 398 nouveau_sysfs_init(struct drm_device *dev)
 399 {
 400         struct drm_nouveau_private *dev_priv = dev->dev_private;
 401         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 402         struct device *d = &dev->pdev->dev;
 403         int ret, i;
 404
 405         ret = device_create_file(d, &dev_attr_performance_level);
 406         if (ret)
 407                 return ret;
 408
 409         for (i = 0; i < pm->nr_perflvl; i++) {
 410                 struct nouveau_pm_level *perflvl = &pm->perflvl[i];
 411
 412                 perflvl->dev_attr.attr.name = perflvl->name;
 413                 perflvl->dev_attr.attr.mode = S_IRUGO;
 414                 perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
 415                 perflvl->dev_attr.store = NULL;
 416                 sysfs_attr_init(&perflvl->dev_attr.attr);
 417
 418                 ret = device_create_file(d, &perflvl->dev_attr);
 419                 if (ret) {
 420                         NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
 421                                  perflvl->id, i);
 422                         perflvl->dev_attr.attr.name = NULL;
 423                         nouveau_pm_fini(dev);
 424                         return ret;
 425                 }
 426         }
 427
 428         return 0;
 429 }
 430
 431 static void
 432 nouveau_sysfs_fini(struct drm_device *dev)
 433 {
 434         struct drm_nouveau_private *dev_priv = dev->dev_private;
 435         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 436         struct device *d = &dev->pdev->dev;
 437         int i;
 438
 439         device_remove_file(d, &dev_attr_performance_level);
 440         for (i = 0; i < pm->nr_perflvl; i++) {
 441                 struct nouveau_pm_level *pl = &pm->perflvl[i];
 442
 443                 if (!pl->dev_attr.attr.name)
 444                         break;
 445
 446                 device_remove_file(d, &pl->dev_attr);
 447         }
 448 }
 449
 450 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 451 static ssize_t
 452 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
 453 {
 454         struct drm_device *dev = dev_get_drvdata(d);
 455         struct drm_nouveau_private *dev_priv = dev->dev_private;
 456         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 457
 458         return snprintf(buf, PAGE_SIZE, "%d\n", pm->temp_get(dev)*1000);
 459 }
 460 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
 461                                                   NULL, 0);
 462
 463 static ssize_t
 464 nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
 465 {
 466         struct drm_device *dev = dev_get_drvdata(d);
 467         struct drm_nouveau_private *dev_priv = dev->dev_private;
 468         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 469         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 470
 471         return snprintf(buf, PAGE_SIZE, "%d\n", temp->down_clock*1000);
 472 }
 473 static ssize_t
 474 nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
 475                                                 const char *buf, size_t count)
 476 {
 477         struct drm_device *dev = dev_get_drvdata(d);
 478         struct drm_nouveau_private *dev_priv = dev->dev_private;
 479         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 480         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 481         long value;
 482
 483         if (kstrtol(buf, 10, &value) == -EINVAL)
 484                 return count;
 485
 486         temp->down_clock = value/1000;
 487
 488         nouveau_temp_safety_checks(dev);
 489
 490         return count;
 491 }
 492 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
 493                                                   nouveau_hwmon_set_max_temp,
 494                                                   0);
 495
 496 static ssize_t
 497 nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
 498                                                         char *buf)
 499 {
 500         struct drm_device *dev = dev_get_drvdata(d);
 501         struct drm_nouveau_private *dev_priv = dev->dev_private;
 502         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 503         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 504
 505         return snprintf(buf, PAGE_SIZE, "%d\n", temp->critical*1000);
 506 }
 507 static ssize_t
 508 nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
 509                                                             const char *buf,
 510                                                                 size_t count)
 511 {
 512         struct drm_device *dev = dev_get_drvdata(d);
 513         struct drm_nouveau_private *dev_priv = dev->dev_private;
 514         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 515         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 516         long value;
 517
 518         if (kstrtol(buf, 10, &value) == -EINVAL)
 519                 return count;
 520
 521         temp->critical = value/1000;
 522
 523         nouveau_temp_safety_checks(dev);
 524
 525         return count;
 526 }
 527 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
 528                                                 nouveau_hwmon_critical_temp,
 529                                                 nouveau_hwmon_set_critical_temp,
 530                                                 0);
 531
 532 static ssize_t nouveau_hwmon_show_name(struct device *dev,
 533                                       struct device_attribute *attr,
 534                                       char *buf)
 535 {
 536         return sprintf(buf, "nouveau\n");
 537 }
 538 static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
 539
 540 static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
 541                                       struct device_attribute *attr,
 542                                       char *buf)
 543 {
 544         return sprintf(buf, "1000\n");
 545 }
 546 static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
 547                                                 nouveau_hwmon_show_update_rate,
 548                                                 NULL, 0);
 549
 550 static ssize_t
 551 nouveau_hwmon_show_fan0_input(struct device *d, struct device_attribute *attr,
 552                               char *buf)
 553 {
 554         struct drm_device *dev = dev_get_drvdata(d);
 555         struct drm_nouveau_private *dev_priv = dev->dev_private;
 556         struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
 557         struct gpio_func gpio;
 558         u32 cycles, cur, prev;
 559         u64 start;
 560         int ret;
 561
 562         ret = nouveau_gpio_find(dev, 0, DCB_GPIO_FAN_SENSE, 0xff, &gpio);
 563         if (ret)
 564                 return ret;
 565
 566         /* Monitor the GPIO input 0x3b for 250ms.
 567          * When the fan spins, it changes the value of GPIO FAN_SENSE.
 568          * We get 4 changes (0 -> 1 -> 0 -> 1 -> [...]) per complete rotation.
 569          */
 570         start = ptimer->read(dev);
 571         prev = nouveau_gpio_sense(dev, 0, gpio.line);
 572         cycles = 0;
 573         do {
 574                 cur = nouveau_gpio_sense(dev, 0, gpio.line);
 575                 if (prev != cur) {
 576                         cycles++;
 577                         prev = cur;
 578                 }
 579
 580                 usleep_range(500, 1000); /* supports 0 < rpm < 7500 */
 581         } while (ptimer->read(dev) - start < 250000000);
 582
 583         /* interpolate to get rpm */
 584         return sprintf(buf, "%i\n", cycles / 4 * 4 * 60);
 585 }
 586 static SENSOR_DEVICE_ATTR(fan0_input, S_IRUGO, nouveau_hwmon_show_fan0_input,
 587                           NULL, 0);
 588
 589 static ssize_t
 590 nouveau_hwmon_get_pwm0(struct device *d, struct device_attribute *a, char *buf)
 591 {
 592         struct drm_device *dev = dev_get_drvdata(d);
 593         int ret;
 594
 595         ret = nouveau_pwmfan_get(dev);
 596         if (ret < 0)
 597                 return ret;
 598
 599         return sprintf(buf, "%i\n", ret);
 600 }
 601
 602 static ssize_t
 603 nouveau_hwmon_set_pwm0(struct device *d, struct device_attribute *a,
 604                        const char *buf, size_t count)
 605 {
 606         struct drm_device *dev = dev_get_drvdata(d);
 607         struct drm_nouveau_private *dev_priv = dev->dev_private;
 608         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 609         int ret = -ENODEV;
 610         long value;
 611
 612         if (nouveau_perflvl_wr != 7777)
 613                 return -EPERM;
 614
 615         if (kstrtol(buf, 10, &value) == -EINVAL)
 616                 return -EINVAL;
 617
 618         if (value < pm->fan.min_duty)
 619                 value = pm->fan.min_duty;
 620         if (value > pm->fan.max_duty)
 621                 value = pm->fan.max_duty;
 622
 623         ret = nouveau_pwmfan_set(dev, value);
 624         if (ret)
 625                 return ret;
 626
 627         return count;
 628 }
 629
 630 static SENSOR_DEVICE_ATTR(pwm0, S_IRUGO | S_IWUSR,
 631                           nouveau_hwmon_get_pwm0,
 632                           nouveau_hwmon_set_pwm0, 0);
 633
 634 static ssize_t
 635 nouveau_hwmon_get_pwm0_min(struct device *d,
 636                            struct device_attribute *a, char *buf)
 637 {
 638         struct drm_device *dev = dev_get_drvdata(d);
 639         struct drm_nouveau_private *dev_priv = dev->dev_private;
 640         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 641
 642         return sprintf(buf, "%i\n", pm->fan.min_duty);
 643 }
 644
 645 static ssize_t
 646 nouveau_hwmon_set_pwm0_min(struct device *d, struct device_attribute *a,
 647                            const char *buf, size_t count)
 648 {
 649         struct drm_device *dev = dev_get_drvdata(d);
 650         struct drm_nouveau_private *dev_priv = dev->dev_private;
 651         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 652         long value;
 653
 654         if (kstrtol(buf, 10, &value) == -EINVAL)
 655                 return -EINVAL;
 656
 657         if (value < 0)
 658                 value = 0;
 659
 660         if (pm->fan.max_duty - value < 10)
 661                 value = pm->fan.max_duty - 10;
 662
 663         if (value < 10)
 664                 pm->fan.min_duty = 10;
 665         else
 666                 pm->fan.min_duty = value;
 667
 668         return count;
 669 }
 670
 671 static SENSOR_DEVICE_ATTR(pwm0_min, S_IRUGO | S_IWUSR,
 672                           nouveau_hwmon_get_pwm0_min,
 673                           nouveau_hwmon_set_pwm0_min, 0);
 674
 675 static ssize_t
 676 nouveau_hwmon_get_pwm0_max(struct device *d,
 677                            struct device_attribute *a, char *buf)
 678 {
 679         struct drm_device *dev = dev_get_drvdata(d);
 680         struct drm_nouveau_private *dev_priv = dev->dev_private;
 681         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 682
 683         return sprintf(buf, "%i\n", pm->fan.max_duty);
 684 }
 685
 686 static ssize_t
 687 nouveau_hwmon_set_pwm0_max(struct device *d, struct device_attribute *a,
 688                            const char *buf, size_t count)
 689 {
 690         struct drm_device *dev = dev_get_drvdata(d);
 691         struct drm_nouveau_private *dev_priv = dev->dev_private;
 692         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 693         long value;
 694
 695         if (kstrtol(buf, 10, &value) == -EINVAL)
 696                 return -EINVAL;
 697
 698         if (value < 0)
 699                 value = 0;
 700
 701         if (value - pm->fan.min_duty < 10)
 702                 value = pm->fan.min_duty + 10;
 703
 704         if (value > 100)
 705                 pm->fan.max_duty = 100;
 706         else
 707                 pm->fan.max_duty = value;
 708
 709         return count;
 710 }
 711
 712 static SENSOR_DEVICE_ATTR(pwm0_max, S_IRUGO | S_IWUSR,
 713                           nouveau_hwmon_get_pwm0_max,
 714                           nouveau_hwmon_set_pwm0_max, 0);
 715
 716 static struct attribute *hwmon_attributes[] = {
 717         &sensor_dev_attr_temp1_input.dev_attr.attr,
 718         &sensor_dev_attr_temp1_max.dev_attr.attr,
 719         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 720         &sensor_dev_attr_name.dev_attr.attr,
 721         &sensor_dev_attr_update_rate.dev_attr.attr,
 722         NULL
 723 };
 724 static struct attribute *hwmon_fan_rpm_attributes[] = {
 725         &sensor_dev_attr_fan0_input.dev_attr.attr,
 726         NULL
 727 };
 728 static struct attribute *hwmon_pwm_fan_attributes[] = {
 729         &sensor_dev_attr_pwm0.dev_attr.attr,
 730         &sensor_dev_attr_pwm0_min.dev_attr.attr,
 731         &sensor_dev_attr_pwm0_max.dev_attr.attr,
 732         NULL
 733 };
 734
 735 static const struct attribute_group hwmon_attrgroup = {
 736         .attrs = hwmon_attributes,
 737 };
 738 static const struct attribute_group hwmon_fan_rpm_attrgroup = {
 739         .attrs = hwmon_fan_rpm_attributes,
 740 };
 741 static const struct attribute_group hwmon_pwm_fan_attrgroup = {
 742         .attrs = hwmon_pwm_fan_attributes,
 743 };
 744 #endif
 745
 746 static int
 747 nouveau_hwmon_init(struct drm_device *dev)
 748 {
 749         struct drm_nouveau_private *dev_priv = dev->dev_private;
 750         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 751 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 752         struct device *hwmon_dev;
 753         int ret = 0;
 754
 755         if (!pm->temp_get)
 756                 return -ENODEV;
 757
 758         hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 759         if (IS_ERR(hwmon_dev)) {
 760                 ret = PTR_ERR(hwmon_dev);
 761                 NV_ERROR(dev,
 762                         "Unable to register hwmon device: %d\n", ret);
 763                 return ret;
 764         }
 765         dev_set_drvdata(hwmon_dev, dev);
 766
 767         /* default sysfs entries */
 768         ret = sysfs_create_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 769         if (ret) {
 770                 if (ret)
 771                         goto error;
 772         }
 773
 774         /* if the card has a pwm fan */
 775         /*XXX: incorrect, need better detection for this, some boards have
 776          *     the gpio entries for pwm fan control even when there's no
 777          *     actual fan connected to it... therm table? */
 778         if (nouveau_pwmfan_get(dev) >= 0) {
 779                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 780                                          &hwmon_pwm_fan_attrgroup);
 781                 if (ret)
 782                         goto error;
 783         }
 784
 785         /* if the card can read the fan rpm */
 786         if (nouveau_gpio_func_valid(dev, DCB_GPIO_FAN_SENSE)) {
 787                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 788                                          &hwmon_fan_rpm_attrgroup);
 789                 if (ret)
 790                         goto error;
 791         }
 792
 793         pm->hwmon = hwmon_dev;
 794
 795         return 0;
 796
 797 error:
 798         NV_ERROR(dev, "Unable to create some hwmon sysfs files: %d\n", ret);
 799         hwmon_device_unregister(hwmon_dev);
 800         pm->hwmon = NULL;
 801         return ret;
 802 #else
 803         pm->hwmon = NULL;
 804         return 0;
 805 #endif
 806 }
 807
 808 static void
 809 nouveau_hwmon_fini(struct drm_device *dev)
 810 {
 811 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 812         struct drm_nouveau_private *dev_priv = dev->dev_private;
 813         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 814
 815         if (pm->hwmon) {
 816                 sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 817                 sysfs_remove_group(&dev->pdev->dev.kobj,
 818                                    &hwmon_pwm_fan_attrgroup);
 819                 sysfs_remove_group(&dev->pdev->dev.kobj,
 820                                    &hwmon_fan_rpm_attrgroup);
 821
 822                 hwmon_device_unregister(pm->hwmon);
 823         }
 824 #endif
 825 }
 826
 827 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 828 static int
 829 nouveau_pm_acpi_event(struct notifier_block *nb, unsigned long val, void *data)
 830 {
 831         struct drm_nouveau_private *dev_priv =
 832                 container_of(nb, struct drm_nouveau_private, engine.pm.acpi_nb);
 833         struct drm_device *dev = dev_priv->dev;
 834         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
 835
 836         if (strcmp(entry->device_class, "ac_adapter") == 0) {
 837                 bool ac = power_supply_is_system_supplied();
 838
 839                 NV_DEBUG(dev, "power supply changed: %s\n", ac ? "AC" : "DC");
 840                 nouveau_pm_trigger(dev);
 841         }
 842
 843         return NOTIFY_OK;
 844 }
 845 #endif
 846
 847 int
 848 nouveau_pm_init(struct drm_device *dev)
 849 {
 850         struct drm_nouveau_private *dev_priv = dev->dev_private;
 851         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 852         char info[256];
 853         int ret, i;
 854
 855         /* parse aux tables from vbios */
 856         nouveau_volt_init(dev);
 857         nouveau_temp_init(dev);
 858
 859         /* determine current ("boot") performance level */
 860         ret = nouveau_pm_perflvl_get(dev, &pm->boot);
 861         if (ret) {
 862                 NV_ERROR(dev, "failed to determine boot perflvl\n");
 863                 return ret;
 864         }
 865
 866         strncpy(pm->boot.name, "boot", 4);
 867         strncpy(pm->boot.profile.name, "boot", 4);
 868         pm->boot.profile.func = &nouveau_pm_static_profile_func;
 869
 870         INIT_LIST_HEAD(&pm->profiles);
 871         list_add(&pm->boot.profile.head, &pm->profiles);
 872
 873         pm->profile_ac = &pm->boot.profile;
 874         pm->profile_dc = &pm->boot.profile;
 875         pm->profile = &pm->boot.profile;
 876         pm->cur = &pm->boot;
 877
 878         /* add performance levels from vbios */
 879         nouveau_perf_init(dev);
 880
 881         /* display available performance levels */
 882         NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
 883         for (i = 0; i < pm->nr_perflvl; i++) {
 884                 nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
 885                 NV_INFO(dev, "%d:%s", pm->perflvl[i].id, info);
 886         }
 887
 888         nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
 889         NV_INFO(dev, "c:%s", info);
 890
 891         /* switch performance levels now if requested */
 892         if (nouveau_perflvl != NULL)
 893                 nouveau_pm_profile_set(dev, nouveau_perflvl);
 894
 895         /* determine the current fan speed */
 896         pm->fan.percent = nouveau_pwmfan_get(dev);
 897
 898         nouveau_sysfs_init(dev);
 899         nouveau_hwmon_init(dev);
 900 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 901         pm->acpi_nb.notifier_call = nouveau_pm_acpi_event;
 902         register_acpi_notifier(&pm->acpi_nb);
 903 #endif
 904
 905         return 0;
 906 }
 907
 908 void
 909 nouveau_pm_fini(struct drm_device *dev)
 910 {
 911         struct drm_nouveau_private *dev_priv = dev->dev_private;
 912         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 913         struct nouveau_pm_profile *profile, *tmp;
 914
 915         list_for_each_entry_safe(profile, tmp, &pm->profiles, head) {
 916                 list_del(&profile->head);
 917                 profile->func->destroy(profile);
 918         }
 919
 920         if (pm->cur != &pm->boot)
 921                 nouveau_pm_perflvl_set(dev, &pm->boot);
 922
 923         nouveau_temp_fini(dev);
 924         nouveau_perf_fini(dev);
 925         nouveau_volt_fini(dev);
 926
 927 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 928         unregister_acpi_notifier(&pm->acpi_nb);
 929 #endif
 930         nouveau_hwmon_fini(dev);
 931         nouveau_sysfs_fini(dev);
 932 }
 933
 934 void
 935 nouveau_pm_resume(struct drm_device *dev)
 936 {
 937         struct drm_nouveau_private *dev_priv = dev->dev_private;
 938         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 939         struct nouveau_pm_level *perflvl;
 940
 941         if (!pm->cur || pm->cur == &pm->boot)
 942                 return;
 943
 944         perflvl = pm->cur;
 945         pm->cur = &pm->boot;
 946         nouveau_pm_perflvl_set(dev, perflvl);
 947         nouveau_pwmfan_set(dev, pm->fan.percent);
 948 }