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