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 static int
 172 nouveau_pm_profile_set(struct drm_device *dev, const char *profile)
 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_level *perflvl = NULL;
 177         u64 start_time;
 178         int ret = 0;
 179         long pl;
 180
 181         /* safety precaution, for now */
 182         if (nouveau_perflvl_wr != 7777)
 183                 return -EPERM;
 184
 185         if (!strncmp(profile, "boot", 4))
 186                 perflvl = &pm->boot;
 187         else {
 188                 int i;
 189                 if (kstrtol(profile, 10, &pl) == -EINVAL)
 190                         return -EINVAL;
 191
 192                 for (i = 0; i < pm->nr_perflvl; i++) {
 193                         if (pm->perflvl[i].id == pl) {
 194                                 perflvl = &pm->perflvl[i];
 195                                 break;
 196                         }
 197                 }
 198
 199                 if (!perflvl)
 200                         return -EINVAL;
 201         }
 202
 203         NV_INFO(dev, "setting performance level: %s", profile);
 204         start_time = nv04_timer_read(dev);
 205         ret = nouveau_pm_perflvl_set(dev, perflvl);
 206         if (!ret) {
 207                 NV_INFO(dev, "> reclocking took %lluns\n\n",
 208                         (nv04_timer_read(dev) - start_time));
 209         } else {
 210                 NV_INFO(dev, "> reclocking failed\n\n");
 211         }
 212
 213         return ret;
 214 }
 215
 216 static int
 217 nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 218 {
 219         struct drm_nouveau_private *dev_priv = dev->dev_private;
 220         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 221         int ret;
 222
 223         memset(perflvl, 0, sizeof(*perflvl));
 224
 225         ret = pm->clocks_get(dev, perflvl);
 226         if (ret)
 227                 return ret;
 228
 229         if (pm->voltage.supported && pm->voltage_get) {
 230                 ret = pm->voltage_get(dev);
 231                 if (ret > 0) {
 232                         perflvl->volt_min = ret;
 233                         perflvl->volt_max = ret;
 234                 }
 235         }
 236
 237         ret = nouveau_pwmfan_get(dev);
 238         if (ret > 0)
 239                 perflvl->fanspeed = ret;
 240
 241         return 0;
 242 }
 243
 244 static void
 245 nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
 246 {
 247         char c[16], s[16], v[32], f[16], t[16], m[16];
 248
 249         c[0] = '\0';
 250         if (perflvl->core)
 251                 snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
 252
 253         s[0] = '\0';
 254         if (perflvl->shader)
 255                 snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);
 256
 257         m[0] = '\0';
 258         if (perflvl->memory)
 259                 snprintf(m, sizeof(m), " memory %dMHz", perflvl->memory / 1000);
 260
 261         v[0] = '\0';
 262         if (perflvl->volt_min && perflvl->volt_min != perflvl->volt_max) {
 263                 snprintf(v, sizeof(v), " voltage %dmV-%dmV",
 264                          perflvl->volt_min / 1000, perflvl->volt_max / 1000);
 265         } else
 266         if (perflvl->volt_min) {
 267                 snprintf(v, sizeof(v), " voltage %dmV",
 268                          perflvl->volt_min / 1000);
 269         }
 270
 271         f[0] = '\0';
 272         if (perflvl->fanspeed)
 273                 snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
 274
 275         t[0] = '\0';
 276         if (perflvl->timing)
 277                 snprintf(t, sizeof(t), " timing %d", perflvl->timing->id);
 278
 279         snprintf(ptr, len, "%s%s%s%s%s%s\n", c, s, m, t, v, f);
 280 }
 281
 282 static ssize_t
 283 nouveau_pm_get_perflvl_info(struct device *d,
 284                             struct device_attribute *a, char *buf)
 285 {
 286         struct nouveau_pm_level *perflvl = (struct nouveau_pm_level *)a;
 287         char *ptr = buf;
 288         int len = PAGE_SIZE;
 289
 290         snprintf(ptr, len, "%d:", perflvl->id);
 291         ptr += strlen(buf);
 292         len -= strlen(buf);
 293
 294         nouveau_pm_perflvl_info(perflvl, ptr, len);
 295         return strlen(buf);
 296 }
 297
 298 static ssize_t
 299 nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
 300 {
 301         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 302         struct drm_nouveau_private *dev_priv = dev->dev_private;
 303         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 304         struct nouveau_pm_level cur;
 305         int len = PAGE_SIZE, ret;
 306         char *ptr = buf;
 307
 308         if (!pm->cur)
 309                 snprintf(ptr, len, "setting: boot\n");
 310         else if (pm->cur == &pm->boot)
 311                 snprintf(ptr, len, "setting: boot\nc:");
 312         else
 313                 snprintf(ptr, len, "setting: static %d\nc:", pm->cur->id);
 314         ptr += strlen(buf);
 315         len -= strlen(buf);
 316
 317         ret = nouveau_pm_perflvl_get(dev, &cur);
 318         if (ret == 0)
 319                 nouveau_pm_perflvl_info(&cur, ptr, len);
 320         return strlen(buf);
 321 }
 322
 323 static ssize_t
 324 nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
 325                        const char *buf, size_t count)
 326 {
 327         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 328         int ret;
 329
 330         ret = nouveau_pm_profile_set(dev, buf);
 331         if (ret)
 332                 return ret;
 333         return strlen(buf);
 334 }
 335
 336 static DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
 337                    nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);
 338
 339 static int
 340 nouveau_sysfs_init(struct drm_device *dev)
 341 {
 342         struct drm_nouveau_private *dev_priv = dev->dev_private;
 343         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 344         struct device *d = &dev->pdev->dev;
 345         int ret, i;
 346
 347         ret = device_create_file(d, &dev_attr_performance_level);
 348         if (ret)
 349                 return ret;
 350
 351         for (i = 0; i < pm->nr_perflvl; i++) {
 352                 struct nouveau_pm_level *perflvl = &pm->perflvl[i];
 353
 354                 perflvl->dev_attr.attr.name = perflvl->name;
 355                 perflvl->dev_attr.attr.mode = S_IRUGO;
 356                 perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
 357                 perflvl->dev_attr.store = NULL;
 358                 sysfs_attr_init(&perflvl->dev_attr.attr);
 359
 360                 ret = device_create_file(d, &perflvl->dev_attr);
 361                 if (ret) {
 362                         NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
 363                                  perflvl->id, i);
 364                         perflvl->dev_attr.attr.name = NULL;
 365                         nouveau_pm_fini(dev);
 366                         return ret;
 367                 }
 368         }
 369
 370         return 0;
 371 }
 372
 373 static void
 374 nouveau_sysfs_fini(struct drm_device *dev)
 375 {
 376         struct drm_nouveau_private *dev_priv = dev->dev_private;
 377         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 378         struct device *d = &dev->pdev->dev;
 379         int i;
 380
 381         device_remove_file(d, &dev_attr_performance_level);
 382         for (i = 0; i < pm->nr_perflvl; i++) {
 383                 struct nouveau_pm_level *pl = &pm->perflvl[i];
 384
 385                 if (!pl->dev_attr.attr.name)
 386                         break;
 387
 388                 device_remove_file(d, &pl->dev_attr);
 389         }
 390 }
 391
 392 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 393 static ssize_t
 394 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
 395 {
 396         struct drm_device *dev = dev_get_drvdata(d);
 397         struct drm_nouveau_private *dev_priv = dev->dev_private;
 398         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 399
 400         return snprintf(buf, PAGE_SIZE, "%d\n", pm->temp_get(dev)*1000);
 401 }
 402 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
 403                                                   NULL, 0);
 404
 405 static ssize_t
 406 nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
 407 {
 408         struct drm_device *dev = dev_get_drvdata(d);
 409         struct drm_nouveau_private *dev_priv = dev->dev_private;
 410         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 411         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 412
 413         return snprintf(buf, PAGE_SIZE, "%d\n", temp->down_clock*1000);
 414 }
 415 static ssize_t
 416 nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
 417                                                 const char *buf, size_t count)
 418 {
 419         struct drm_device *dev = dev_get_drvdata(d);
 420         struct drm_nouveau_private *dev_priv = dev->dev_private;
 421         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 422         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 423         long value;
 424
 425         if (kstrtol(buf, 10, &value) == -EINVAL)
 426                 return count;
 427
 428         temp->down_clock = value/1000;
 429
 430         nouveau_temp_safety_checks(dev);
 431
 432         return count;
 433 }
 434 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
 435                                                   nouveau_hwmon_set_max_temp,
 436                                                   0);
 437
 438 static ssize_t
 439 nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
 440                                                         char *buf)
 441 {
 442         struct drm_device *dev = dev_get_drvdata(d);
 443         struct drm_nouveau_private *dev_priv = dev->dev_private;
 444         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 445         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 446
 447         return snprintf(buf, PAGE_SIZE, "%d\n", temp->critical*1000);
 448 }
 449 static ssize_t
 450 nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
 451                                                             const char *buf,
 452                                                                 size_t count)
 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         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 458         long value;
 459
 460         if (kstrtol(buf, 10, &value) == -EINVAL)
 461                 return count;
 462
 463         temp->critical = value/1000;
 464
 465         nouveau_temp_safety_checks(dev);
 466
 467         return count;
 468 }
 469 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
 470                                                 nouveau_hwmon_critical_temp,
 471                                                 nouveau_hwmon_set_critical_temp,
 472                                                 0);
 473
 474 static ssize_t nouveau_hwmon_show_name(struct device *dev,
 475                                       struct device_attribute *attr,
 476                                       char *buf)
 477 {
 478         return sprintf(buf, "nouveau\n");
 479 }
 480 static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
 481
 482 static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
 483                                       struct device_attribute *attr,
 484                                       char *buf)
 485 {
 486         return sprintf(buf, "1000\n");
 487 }
 488 static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
 489                                                 nouveau_hwmon_show_update_rate,
 490                                                 NULL, 0);
 491
 492 static ssize_t
 493 nouveau_hwmon_show_fan0_input(struct device *d, struct device_attribute *attr,
 494                               char *buf)
 495 {
 496         struct drm_device *dev = dev_get_drvdata(d);
 497         struct drm_nouveau_private *dev_priv = dev->dev_private;
 498         struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
 499         struct gpio_func gpio;
 500         u32 cycles, cur, prev;
 501         u64 start;
 502         int ret;
 503
 504         ret = nouveau_gpio_find(dev, 0, DCB_GPIO_FAN_SENSE, 0xff, &gpio);
 505         if (ret)
 506                 return ret;
 507
 508         /* Monitor the GPIO input 0x3b for 250ms.
 509          * When the fan spins, it changes the value of GPIO FAN_SENSE.
 510          * We get 4 changes (0 -> 1 -> 0 -> 1 -> [...]) per complete rotation.
 511          */
 512         start = ptimer->read(dev);
 513         prev = nouveau_gpio_sense(dev, 0, gpio.line);
 514         cycles = 0;
 515         do {
 516                 cur = nouveau_gpio_sense(dev, 0, gpio.line);
 517                 if (prev != cur) {
 518                         cycles++;
 519                         prev = cur;
 520                 }
 521
 522                 usleep_range(500, 1000); /* supports 0 < rpm < 7500 */
 523         } while (ptimer->read(dev) - start < 250000000);
 524
 525         /* interpolate to get rpm */
 526         return sprintf(buf, "%i\n", cycles / 4 * 4 * 60);
 527 }
 528 static SENSOR_DEVICE_ATTR(fan0_input, S_IRUGO, nouveau_hwmon_show_fan0_input,
 529                           NULL, 0);
 530
 531 static ssize_t
 532 nouveau_hwmon_get_pwm0(struct device *d, struct device_attribute *a, char *buf)
 533 {
 534         struct drm_device *dev = dev_get_drvdata(d);
 535         int ret;
 536
 537         ret = nouveau_pwmfan_get(dev);
 538         if (ret < 0)
 539                 return ret;
 540
 541         return sprintf(buf, "%i\n", ret);
 542 }
 543
 544 static ssize_t
 545 nouveau_hwmon_set_pwm0(struct device *d, struct device_attribute *a,
 546                        const char *buf, size_t count)
 547 {
 548         struct drm_device *dev = dev_get_drvdata(d);
 549         struct drm_nouveau_private *dev_priv = dev->dev_private;
 550         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 551         int ret = -ENODEV;
 552         long value;
 553
 554         if (nouveau_perflvl_wr != 7777)
 555                 return -EPERM;
 556
 557         if (kstrtol(buf, 10, &value) == -EINVAL)
 558                 return -EINVAL;
 559
 560         if (value < pm->fan.min_duty)
 561                 value = pm->fan.min_duty;
 562         if (value > pm->fan.max_duty)
 563                 value = pm->fan.max_duty;
 564
 565         ret = nouveau_pwmfan_set(dev, value);
 566         if (ret)
 567                 return ret;
 568
 569         return count;
 570 }
 571
 572 static SENSOR_DEVICE_ATTR(pwm0, S_IRUGO | S_IWUSR,
 573                           nouveau_hwmon_get_pwm0,
 574                           nouveau_hwmon_set_pwm0, 0);
 575
 576 static ssize_t
 577 nouveau_hwmon_get_pwm0_min(struct device *d,
 578                            struct device_attribute *a, char *buf)
 579 {
 580         struct drm_device *dev = dev_get_drvdata(d);
 581         struct drm_nouveau_private *dev_priv = dev->dev_private;
 582         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 583
 584         return sprintf(buf, "%i\n", pm->fan.min_duty);
 585 }
 586
 587 static ssize_t
 588 nouveau_hwmon_set_pwm0_min(struct device *d, struct device_attribute *a,
 589                            const char *buf, size_t count)
 590 {
 591         struct drm_device *dev = dev_get_drvdata(d);
 592         struct drm_nouveau_private *dev_priv = dev->dev_private;
 593         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 594         long value;
 595
 596         if (kstrtol(buf, 10, &value) == -EINVAL)
 597                 return -EINVAL;
 598
 599         if (value < 0)
 600                 value = 0;
 601
 602         if (pm->fan.max_duty - value < 10)
 603                 value = pm->fan.max_duty - 10;
 604
 605         if (value < 10)
 606                 pm->fan.min_duty = 10;
 607         else
 608                 pm->fan.min_duty = value;
 609
 610         return count;
 611 }
 612
 613 static SENSOR_DEVICE_ATTR(pwm0_min, S_IRUGO | S_IWUSR,
 614                           nouveau_hwmon_get_pwm0_min,
 615                           nouveau_hwmon_set_pwm0_min, 0);
 616
 617 static ssize_t
 618 nouveau_hwmon_get_pwm0_max(struct device *d,
 619                            struct device_attribute *a, char *buf)
 620 {
 621         struct drm_device *dev = dev_get_drvdata(d);
 622         struct drm_nouveau_private *dev_priv = dev->dev_private;
 623         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 624
 625         return sprintf(buf, "%i\n", pm->fan.max_duty);
 626 }
 627
 628 static ssize_t
 629 nouveau_hwmon_set_pwm0_max(struct device *d, struct device_attribute *a,
 630                            const char *buf, size_t count)
 631 {
 632         struct drm_device *dev = dev_get_drvdata(d);
 633         struct drm_nouveau_private *dev_priv = dev->dev_private;
 634         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 635         long value;
 636
 637         if (kstrtol(buf, 10, &value) == -EINVAL)
 638                 return -EINVAL;
 639
 640         if (value < 0)
 641                 value = 0;
 642
 643         if (value - pm->fan.min_duty < 10)
 644                 value = pm->fan.min_duty + 10;
 645
 646         if (value > 100)
 647                 pm->fan.max_duty = 100;
 648         else
 649                 pm->fan.max_duty = value;
 650
 651         return count;
 652 }
 653
 654 static SENSOR_DEVICE_ATTR(pwm0_max, S_IRUGO | S_IWUSR,
 655                           nouveau_hwmon_get_pwm0_max,
 656                           nouveau_hwmon_set_pwm0_max, 0);
 657
 658 static struct attribute *hwmon_attributes[] = {
 659         &sensor_dev_attr_temp1_input.dev_attr.attr,
 660         &sensor_dev_attr_temp1_max.dev_attr.attr,
 661         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 662         &sensor_dev_attr_name.dev_attr.attr,
 663         &sensor_dev_attr_update_rate.dev_attr.attr,
 664         NULL
 665 };
 666 static struct attribute *hwmon_fan_rpm_attributes[] = {
 667         &sensor_dev_attr_fan0_input.dev_attr.attr,
 668         NULL
 669 };
 670 static struct attribute *hwmon_pwm_fan_attributes[] = {
 671         &sensor_dev_attr_pwm0.dev_attr.attr,
 672         &sensor_dev_attr_pwm0_min.dev_attr.attr,
 673         &sensor_dev_attr_pwm0_max.dev_attr.attr,
 674         NULL
 675 };
 676
 677 static const struct attribute_group hwmon_attrgroup = {
 678         .attrs = hwmon_attributes,
 679 };
 680 static const struct attribute_group hwmon_fan_rpm_attrgroup = {
 681         .attrs = hwmon_fan_rpm_attributes,
 682 };
 683 static const struct attribute_group hwmon_pwm_fan_attrgroup = {
 684         .attrs = hwmon_pwm_fan_attributes,
 685 };
 686 #endif
 687
 688 static int
 689 nouveau_hwmon_init(struct drm_device *dev)
 690 {
 691         struct drm_nouveau_private *dev_priv = dev->dev_private;
 692         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 693 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 694         struct device *hwmon_dev;
 695         int ret = 0;
 696
 697         if (!pm->temp_get)
 698                 return -ENODEV;
 699
 700         hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 701         if (IS_ERR(hwmon_dev)) {
 702                 ret = PTR_ERR(hwmon_dev);
 703                 NV_ERROR(dev,
 704                         "Unable to register hwmon device: %d\n", ret);
 705                 return ret;
 706         }
 707         dev_set_drvdata(hwmon_dev, dev);
 708
 709         /* default sysfs entries */
 710         ret = sysfs_create_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 711         if (ret) {
 712                 if (ret)
 713                         goto error;
 714         }
 715
 716         /* if the card has a pwm fan */
 717         /*XXX: incorrect, need better detection for this, some boards have
 718          *     the gpio entries for pwm fan control even when there's no
 719          *     actual fan connected to it... therm table? */
 720         if (nouveau_pwmfan_get(dev) >= 0) {
 721                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 722                                          &hwmon_pwm_fan_attrgroup);
 723                 if (ret)
 724                         goto error;
 725         }
 726
 727         /* if the card can read the fan rpm */
 728         if (nouveau_gpio_func_valid(dev, DCB_GPIO_FAN_SENSE)) {
 729                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 730                                          &hwmon_fan_rpm_attrgroup);
 731                 if (ret)
 732                         goto error;
 733         }
 734
 735         pm->hwmon = hwmon_dev;
 736
 737         return 0;
 738
 739 error:
 740         NV_ERROR(dev, "Unable to create some hwmon sysfs files: %d\n", ret);
 741         hwmon_device_unregister(hwmon_dev);
 742         pm->hwmon = NULL;
 743         return ret;
 744 #else
 745         pm->hwmon = NULL;
 746         return 0;
 747 #endif
 748 }
 749
 750 static void
 751 nouveau_hwmon_fini(struct drm_device *dev)
 752 {
 753 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 754         struct drm_nouveau_private *dev_priv = dev->dev_private;
 755         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 756
 757         if (pm->hwmon) {
 758                 sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 759                 sysfs_remove_group(&dev->pdev->dev.kobj,
 760                                    &hwmon_pwm_fan_attrgroup);
 761                 sysfs_remove_group(&dev->pdev->dev.kobj,
 762                                    &hwmon_fan_rpm_attrgroup);
 763
 764                 hwmon_device_unregister(pm->hwmon);
 765         }
 766 #endif
 767 }
 768
 769 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 770 static int
 771 nouveau_pm_acpi_event(struct notifier_block *nb, unsigned long val, void *data)
 772 {
 773         struct drm_nouveau_private *dev_priv =
 774                 container_of(nb, struct drm_nouveau_private, engine.pm.acpi_nb);
 775         struct drm_device *dev = dev_priv->dev;
 776         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
 777
 778         if (strcmp(entry->device_class, "ac_adapter") == 0) {
 779                 bool ac = power_supply_is_system_supplied();
 780
 781                 NV_DEBUG(dev, "power supply changed: %s\n", ac ? "AC" : "DC");
 782         }
 783
 784         return NOTIFY_OK;
 785 }
 786 #endif
 787
 788 int
 789 nouveau_pm_init(struct drm_device *dev)
 790 {
 791         struct drm_nouveau_private *dev_priv = dev->dev_private;
 792         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 793         char info[256];
 794         int ret, i;
 795
 796         nouveau_mem_timing_init(dev);
 797         nouveau_volt_init(dev);
 798         nouveau_perf_init(dev);
 799         nouveau_temp_init(dev);
 800
 801         NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
 802         for (i = 0; i < pm->nr_perflvl; i++) {
 803                 nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
 804                 NV_INFO(dev, "%d:%s", pm->perflvl[i].id, info);
 805         }
 806
 807         /* determine current ("boot") performance level */
 808         ret = nouveau_pm_perflvl_get(dev, &pm->boot);
 809         if (ret == 0) {
 810                 strncpy(pm->boot.name, "boot", 4);
 811                 pm->boot.timing = &pm->memtimings.boot;
 812                 pm->cur = &pm->boot;
 813
 814                 nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
 815                 NV_INFO(dev, "c:%s", info);
 816         }
 817
 818         /* switch performance levels now if requested */
 819         if (nouveau_perflvl != NULL) {
 820                 ret = nouveau_pm_profile_set(dev, nouveau_perflvl);
 821                 if (ret) {
 822                         NV_ERROR(dev, "error setting perflvl \"%s\": %d\n",
 823                                  nouveau_perflvl, ret);
 824                 }
 825         }
 826
 827         /* determine the current fan speed */
 828         pm->fan.percent = nouveau_pwmfan_get(dev);
 829
 830         nouveau_sysfs_init(dev);
 831         nouveau_hwmon_init(dev);
 832 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 833         pm->acpi_nb.notifier_call = nouveau_pm_acpi_event;
 834         register_acpi_notifier(&pm->acpi_nb);
 835 #endif
 836
 837         return 0;
 838 }
 839
 840 void
 841 nouveau_pm_fini(struct drm_device *dev)
 842 {
 843         struct drm_nouveau_private *dev_priv = dev->dev_private;
 844         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 845
 846         if (pm->cur != &pm->boot)
 847                 nouveau_pm_perflvl_set(dev, &pm->boot);
 848
 849         nouveau_temp_fini(dev);
 850         nouveau_perf_fini(dev);
 851         nouveau_volt_fini(dev);
 852         nouveau_mem_timing_fini(dev);
 853
 854 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 855         unregister_acpi_notifier(&pm->acpi_nb);
 856 #endif
 857         nouveau_hwmon_fini(dev);
 858         nouveau_sysfs_fini(dev);
 859 }
 860
 861 void
 862 nouveau_pm_resume(struct drm_device *dev)
 863 {
 864         struct drm_nouveau_private *dev_priv = dev->dev_private;
 865         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 866         struct nouveau_pm_level *perflvl;
 867
 868         if (!pm->cur || pm->cur == &pm->boot)
 869                 return;
 870
 871         perflvl = pm->cur;
 872         pm->cur = &pm->boot;
 873         nouveau_pm_perflvl_set(dev, perflvl);
 874         nouveau_pwmfan_set(dev, pm->fan.percent);
 875 }