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