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, &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, divs, duty);
  94         }
  95
  96         return -ENODEV;
  97 }
  98
  99 static int
 100 nouveau_pm_clock_set(struct drm_device *dev, struct nouveau_pm_level *perflvl,
 101                      u8 id, u32 khz)
 102 {
 103         struct drm_nouveau_private *dev_priv = dev->dev_private;
 104         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 105         void *pre_state;
 106
 107         if (khz == 0)
 108                 return 0;
 109
 110         pre_state = pm->clock_pre(dev, perflvl, id, khz);
 111         if (IS_ERR(pre_state))
 112                 return PTR_ERR(pre_state);
 113
 114         if (pre_state)
 115                 pm->clock_set(dev, pre_state);
 116         return 0;
 117 }
 118
 119 static int
 120 nouveau_pm_perflvl_set(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 121 {
 122         struct drm_nouveau_private *dev_priv = dev->dev_private;
 123         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 124         int ret;
 125
 126         if (perflvl == pm->cur)
 127                 return 0;
 128
 129         /*XXX: not on all boards, we should control based on temperature
 130          *     on recent boards..  or maybe on some other factor we don't
 131          *     know about?
 132          */
 133         if (perflvl->fanspeed) {
 134                 ret = nouveau_pwmfan_set(dev, perflvl->fanspeed);
 135                 if (ret && ret != -ENODEV)
 136                         NV_ERROR(dev, "set fanspeed failed: %d\n", ret);
 137         }
 138
 139         if (pm->voltage.supported && pm->voltage_set && perflvl->volt_min) {
 140                 ret = pm->voltage_set(dev, perflvl->volt_min);
 141                 if (ret) {
 142                         NV_ERROR(dev, "voltage_set %d failed: %d\n",
 143                                  perflvl->volt_min, ret);
 144                 }
 145         }
 146
 147         if (pm->clocks_pre) {
 148                 void *state = pm->clocks_pre(dev, perflvl);
 149                 if (IS_ERR(state))
 150                         return PTR_ERR(state);
 151                 pm->clocks_set(dev, state);
 152         } else
 153         if (pm->clock_set) {
 154                 nouveau_pm_clock_set(dev, perflvl, PLL_CORE, perflvl->core);
 155                 nouveau_pm_clock_set(dev, perflvl, PLL_SHADER, perflvl->shader);
 156                 nouveau_pm_clock_set(dev, perflvl, PLL_MEMORY, perflvl->memory);
 157                 nouveau_pm_clock_set(dev, perflvl, PLL_UNK05, perflvl->unk05);
 158         }
 159
 160         pm->cur = perflvl;
 161         return 0;
 162 }
 163
 164 static int
 165 nouveau_pm_profile_set(struct drm_device *dev, const char *profile)
 166 {
 167         struct drm_nouveau_private *dev_priv = dev->dev_private;
 168         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 169         struct nouveau_pm_level *perflvl = NULL;
 170
 171         /* safety precaution, for now */
 172         if (nouveau_perflvl_wr != 7777)
 173                 return -EPERM;
 174
 175         if (!strncmp(profile, "boot", 4))
 176                 perflvl = &pm->boot;
 177         else {
 178                 int pl = simple_strtol(profile, NULL, 10);
 179                 int i;
 180
 181                 for (i = 0; i < pm->nr_perflvl; i++) {
 182                         if (pm->perflvl[i].id == pl) {
 183                                 perflvl = &pm->perflvl[i];
 184                                 break;
 185                         }
 186                 }
 187
 188                 if (!perflvl)
 189                         return -EINVAL;
 190         }
 191
 192         NV_INFO(dev, "setting performance level: %s\n", profile);
 193         return nouveau_pm_perflvl_set(dev, perflvl);
 194 }
 195
 196 static int
 197 nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 198 {
 199         struct drm_nouveau_private *dev_priv = dev->dev_private;
 200         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 201         int ret;
 202
 203         memset(perflvl, 0, sizeof(*perflvl));
 204
 205         if (pm->clocks_get) {
 206                 ret = pm->clocks_get(dev, perflvl);
 207                 if (ret)
 208                         return ret;
 209         } else
 210         if (pm->clock_get) {
 211                 ret = pm->clock_get(dev, PLL_CORE);
 212                 if (ret > 0)
 213                         perflvl->core = ret;
 214
 215                 ret = pm->clock_get(dev, PLL_MEMORY);
 216                 if (ret > 0)
 217                         perflvl->memory = ret;
 218
 219                 ret = pm->clock_get(dev, PLL_SHADER);
 220                 if (ret > 0)
 221                         perflvl->shader = ret;
 222
 223                 ret = pm->clock_get(dev, PLL_UNK05);
 224                 if (ret > 0)
 225                         perflvl->unk05 = ret;
 226         }
 227
 228         if (pm->voltage.supported && pm->voltage_get) {
 229                 ret = pm->voltage_get(dev);
 230                 if (ret > 0) {
 231                         perflvl->volt_min = ret;
 232                         perflvl->volt_max = ret;
 233                 }
 234         }
 235
 236         ret = nouveau_pwmfan_get(dev);
 237         if (ret > 0)
 238                 perflvl->fanspeed = ret;
 239
 240         return 0;
 241 }
 242
 243 static void
 244 nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
 245 {
 246         char c[16], s[16], v[32], f[16], t[16], m[16];
 247
 248         c[0] = '\0';
 249         if (perflvl->core)
 250                 snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
 251
 252         s[0] = '\0';
 253         if (perflvl->shader)
 254                 snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);
 255
 256         m[0] = '\0';
 257         if (perflvl->memory)
 258                 snprintf(m, sizeof(m), " memory %dMHz", perflvl->memory / 1000);
 259
 260         v[0] = '\0';
 261         if (perflvl->volt_min && perflvl->volt_min != perflvl->volt_max) {
 262                 snprintf(v, sizeof(v), " voltage %dmV-%dmV",
 263                          perflvl->volt_min / 1000, perflvl->volt_max / 1000);
 264         } else
 265         if (perflvl->volt_min) {
 266                 snprintf(v, sizeof(v), " voltage %dmV",
 267                          perflvl->volt_min / 1000);
 268         }
 269
 270         f[0] = '\0';
 271         if (perflvl->fanspeed)
 272                 snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
 273
 274         t[0] = '\0';
 275         if (perflvl->timing)
 276                 snprintf(t, sizeof(t), " timing %d", perflvl->timing->id);
 277
 278         snprintf(ptr, len, "%s%s%s%s%s%s\n", c, s, m, t, v, f);
 279 }
 280
 281 static ssize_t
 282 nouveau_pm_get_perflvl_info(struct device *d,
 283                             struct device_attribute *a, char *buf)
 284 {
 285         struct nouveau_pm_level *perflvl = (struct nouveau_pm_level *)a;
 286         char *ptr = buf;
 287         int len = PAGE_SIZE;
 288
 289         snprintf(ptr, len, "%d:", perflvl->id);
 290         ptr += strlen(buf);
 291         len -= strlen(buf);
 292
 293         nouveau_pm_perflvl_info(perflvl, ptr, len);
 294         return strlen(buf);
 295 }
 296
 297 static ssize_t
 298 nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
 299 {
 300         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 301         struct drm_nouveau_private *dev_priv = dev->dev_private;
 302         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 303         struct nouveau_pm_level cur;
 304         int len = PAGE_SIZE, ret;
 305         char *ptr = buf;
 306
 307         if (!pm->cur)
 308                 snprintf(ptr, len, "setting: boot\n");
 309         else if (pm->cur == &pm->boot)
 310                 snprintf(ptr, len, "setting: boot\nc:");
 311         else
 312                 snprintf(ptr, len, "setting: static %d\nc:", pm->cur->id);
 313         ptr += strlen(buf);
 314         len -= strlen(buf);
 315
 316         ret = nouveau_pm_perflvl_get(dev, &cur);
 317         if (ret == 0)
 318                 nouveau_pm_perflvl_info(&cur, ptr, len);
 319         return strlen(buf);
 320 }
 321
 322 static ssize_t
 323 nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
 324                        const char *buf, size_t count)
 325 {
 326         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 327         int ret;
 328
 329         ret = nouveau_pm_profile_set(dev, buf);
 330         if (ret)
 331                 return ret;
 332         return strlen(buf);
 333 }
 334
 335 static DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
 336                    nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);
 337
 338 static int
 339 nouveau_sysfs_init(struct drm_device *dev)
 340 {
 341         struct drm_nouveau_private *dev_priv = dev->dev_private;
 342         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 343         struct device *d = &dev->pdev->dev;
 344         int ret, i;
 345
 346         ret = device_create_file(d, &dev_attr_performance_level);
 347         if (ret)
 348                 return ret;
 349
 350         for (i = 0; i < pm->nr_perflvl; i++) {
 351                 struct nouveau_pm_level *perflvl = &pm->perflvl[i];
 352
 353                 perflvl->dev_attr.attr.name = perflvl->name;
 354                 perflvl->dev_attr.attr.mode = S_IRUGO;
 355                 perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
 356                 perflvl->dev_attr.store = NULL;
 357                 sysfs_attr_init(&perflvl->dev_attr.attr);
 358
 359                 ret = device_create_file(d, &perflvl->dev_attr);
 360                 if (ret) {
 361                         NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
 362                                  perflvl->id, i);
 363                         perflvl->dev_attr.attr.name = NULL;
 364                         nouveau_pm_fini(dev);
 365                         return ret;
 366                 }
 367         }
 368
 369         return 0;
 370 }
 371
 372 static void
 373 nouveau_sysfs_fini(struct drm_device *dev)
 374 {
 375         struct drm_nouveau_private *dev_priv = dev->dev_private;
 376         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 377         struct device *d = &dev->pdev->dev;
 378         int i;
 379
 380         device_remove_file(d, &dev_attr_performance_level);
 381         for (i = 0; i < pm->nr_perflvl; i++) {
 382                 struct nouveau_pm_level *pl = &pm->perflvl[i];
 383
 384                 if (!pl->dev_attr.attr.name)
 385                         break;
 386
 387                 device_remove_file(d, &pl->dev_attr);
 388         }
 389 }
 390
 391 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 392 static ssize_t
 393 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
 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
 399         return snprintf(buf, PAGE_SIZE, "%d\n", pm->temp_get(dev)*1000);
 400 }
 401 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
 402                                                   NULL, 0);
 403
 404 static ssize_t
 405 nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
 406 {
 407         struct drm_device *dev = dev_get_drvdata(d);
 408         struct drm_nouveau_private *dev_priv = dev->dev_private;
 409         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 410         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 411
 412         return snprintf(buf, PAGE_SIZE, "%d\n", temp->down_clock*1000);
 413 }
 414 static ssize_t
 415 nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
 416                                                 const char *buf, size_t count)
 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         long value;
 423
 424         if (strict_strtol(buf, 10, &value) == -EINVAL)
 425                 return count;
 426
 427         temp->down_clock = value/1000;
 428
 429         nouveau_temp_safety_checks(dev);
 430
 431         return count;
 432 }
 433 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
 434                                                   nouveau_hwmon_set_max_temp,
 435                                                   0);
 436
 437 static ssize_t
 438 nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
 439                                                         char *buf)
 440 {
 441         struct drm_device *dev = dev_get_drvdata(d);
 442         struct drm_nouveau_private *dev_priv = dev->dev_private;
 443         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 444         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 445
 446         return snprintf(buf, PAGE_SIZE, "%d\n", temp->critical*1000);
 447 }
 448 static ssize_t
 449 nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
 450                                                             const char *buf,
 451                                                                 size_t count)
 452 {
 453         struct drm_device *dev = dev_get_drvdata(d);
 454         struct drm_nouveau_private *dev_priv = dev->dev_private;
 455         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 456         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 457         long value;
 458
 459         if (strict_strtol(buf, 10, &value) == -EINVAL)
 460                 return count;
 461
 462         temp->critical = value/1000;
 463
 464         nouveau_temp_safety_checks(dev);
 465
 466         return count;
 467 }
 468 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
 469                                                 nouveau_hwmon_critical_temp,
 470                                                 nouveau_hwmon_set_critical_temp,
 471                                                 0);
 472
 473 static ssize_t nouveau_hwmon_show_name(struct device *dev,
 474                                       struct device_attribute *attr,
 475                                       char *buf)
 476 {
 477         return sprintf(buf, "nouveau\n");
 478 }
 479 static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
 480
 481 static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
 482                                       struct device_attribute *attr,
 483                                       char *buf)
 484 {
 485         return sprintf(buf, "1000\n");
 486 }
 487 static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
 488                                                 nouveau_hwmon_show_update_rate,
 489                                                 NULL, 0);
 490
 491 static ssize_t
 492 nouveau_hwmon_show_fan0_input(struct device *d, struct device_attribute *attr,
 493                               char *buf)
 494 {
 495         struct drm_device *dev = dev_get_drvdata(d);
 496         struct drm_nouveau_private *dev_priv = dev->dev_private;
 497         struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
 498         struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
 499         struct dcb_gpio_entry *gpio;
 500         u32 cycles, cur, prev;
 501         u64 start;
 502
 503         gpio = nouveau_bios_gpio_entry(dev, DCB_GPIO_FAN_SENSE);
 504         if (!gpio)
 505                 return -ENODEV;
 506
 507         /* Monitor the GPIO input 0x3b for 250ms.
 508          * When the fan spins, it changes the value of GPIO FAN_SENSE.
 509          * We get 4 changes (0 -> 1 -> 0 -> 1 -> [...]) per complete rotation.
 510          */
 511         start = ptimer->read(dev);
 512         prev = pgpio->get(dev, DCB_GPIO_FAN_SENSE);
 513         cycles = 0;
 514         do {
 515                 cur = pgpio->get(dev, DCB_GPIO_FAN_SENSE);
 516                 if (prev != cur) {
 517                         cycles++;
 518                         prev = cur;
 519                 }
 520
 521                 usleep_range(500, 1000); /* supports 0 < rpm < 7500 */
 522         } while (ptimer->read(dev) - start < 250000000);
 523
 524         /* interpolate to get rpm */
 525         return sprintf(buf, "%i\n", cycles / 4 * 4 * 60);
 526 }
 527 static SENSOR_DEVICE_ATTR(fan0_input, S_IRUGO, nouveau_hwmon_show_fan0_input,
 528                           NULL, 0);
 529
 530 static ssize_t
 531 nouveau_hwmon_get_pwm0(struct device *d, struct device_attribute *a, char *buf)
 532 {
 533         struct drm_device *dev = dev_get_drvdata(d);
 534         int ret;
 535
 536         ret = nouveau_pwmfan_get(dev);
 537         if (ret < 0)
 538                 return ret;
 539
 540         return sprintf(buf, "%i\n", ret);
 541 }
 542
 543 static ssize_t
 544 nouveau_hwmon_set_pwm0(struct device *d, struct device_attribute *a,
 545                        const char *buf, size_t count)
 546 {
 547         struct drm_device *dev = dev_get_drvdata(d);
 548         struct drm_nouveau_private *dev_priv = dev->dev_private;
 549         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 550         int ret = -ENODEV;
 551         long value;
 552
 553         if (nouveau_perflvl_wr != 7777)
 554                 return -EPERM;
 555
 556         if (strict_strtol(buf, 10, &value) == -EINVAL)
 557                 return -EINVAL;
 558
 559         if (value < pm->fan.min_duty)
 560                 value = pm->fan.min_duty;
 561         if (value > pm->fan.max_duty)
 562                 value = pm->fan.max_duty;
 563
 564         ret = nouveau_pwmfan_set(dev, value);
 565         if (ret)
 566                 return ret;
 567
 568         return count;
 569 }
 570
 571 static SENSOR_DEVICE_ATTR(pwm0, S_IRUGO | S_IWUSR,
 572                           nouveau_hwmon_get_pwm0,
 573                           nouveau_hwmon_set_pwm0, 0);
 574
 575 static ssize_t
 576 nouveau_hwmon_get_pwm0_min(struct device *d,
 577                            struct device_attribute *a, char *buf)
 578 {
 579         struct drm_device *dev = dev_get_drvdata(d);
 580         struct drm_nouveau_private *dev_priv = dev->dev_private;
 581         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 582
 583         return sprintf(buf, "%i\n", pm->fan.min_duty);
 584 }
 585
 586 static ssize_t
 587 nouveau_hwmon_set_pwm0_min(struct device *d, struct device_attribute *a,
 588                            const char *buf, size_t count)
 589 {
 590         struct drm_device *dev = dev_get_drvdata(d);
 591         struct drm_nouveau_private *dev_priv = dev->dev_private;
 592         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 593         long value;
 594
 595         if (strict_strtol(buf, 10, &value) == -EINVAL)
 596                 return -EINVAL;
 597
 598         if (value < 0)
 599                 value = 0;
 600
 601         if (pm->fan.max_duty - value < 10)
 602                 value = pm->fan.max_duty - 10;
 603
 604         if (value < 10)
 605                 pm->fan.min_duty = 10;
 606         else
 607                 pm->fan.min_duty = value;
 608
 609         return count;
 610 }
 611
 612 static SENSOR_DEVICE_ATTR(pwm0_min, S_IRUGO | S_IWUSR,
 613                           nouveau_hwmon_get_pwm0_min,
 614                           nouveau_hwmon_set_pwm0_min, 0);
 615
 616 static ssize_t
 617 nouveau_hwmon_get_pwm0_max(struct device *d,
 618                            struct device_attribute *a, char *buf)
 619 {
 620         struct drm_device *dev = dev_get_drvdata(d);
 621         struct drm_nouveau_private *dev_priv = dev->dev_private;
 622         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 623
 624         return sprintf(buf, "%i\n", pm->fan.max_duty);
 625 }
 626
 627 static ssize_t
 628 nouveau_hwmon_set_pwm0_max(struct device *d, struct device_attribute *a,
 629                            const char *buf, size_t count)
 630 {
 631         struct drm_device *dev = dev_get_drvdata(d);
 632         struct drm_nouveau_private *dev_priv = dev->dev_private;
 633         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 634         long value;
 635
 636         if (strict_strtol(buf, 10, &value) == -EINVAL)
 637                 return -EINVAL;
 638
 639         if (value < 0)
 640                 value = 0;
 641
 642         if (value - pm->fan.min_duty < 10)
 643                 value = pm->fan.min_duty + 10;
 644
 645         if (value > 100)
 646                 pm->fan.max_duty = 100;
 647         else
 648                 pm->fan.max_duty = value;
 649
 650         return count;
 651 }
 652
 653 static SENSOR_DEVICE_ATTR(pwm0_max, S_IRUGO | S_IWUSR,
 654                           nouveau_hwmon_get_pwm0_max,
 655                           nouveau_hwmon_set_pwm0_max, 0);
 656
 657 static struct attribute *hwmon_attributes[] = {
 658         &sensor_dev_attr_temp1_input.dev_attr.attr,
 659         &sensor_dev_attr_temp1_max.dev_attr.attr,
 660         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 661         &sensor_dev_attr_name.dev_attr.attr,
 662         &sensor_dev_attr_update_rate.dev_attr.attr,
 663         NULL
 664 };
 665 static struct attribute *hwmon_fan_rpm_attributes[] = {
 666         &sensor_dev_attr_fan0_input.dev_attr.attr,
 667         NULL
 668 };
 669 static struct attribute *hwmon_pwm_fan_attributes[] = {
 670         &sensor_dev_attr_pwm0.dev_attr.attr,
 671         &sensor_dev_attr_pwm0_min.dev_attr.attr,
 672         &sensor_dev_attr_pwm0_max.dev_attr.attr,
 673         NULL
 674 };
 675
 676 static const struct attribute_group hwmon_attrgroup = {
 677         .attrs = hwmon_attributes,
 678 };
 679 static const struct attribute_group hwmon_fan_rpm_attrgroup = {
 680         .attrs = hwmon_fan_rpm_attributes,
 681 };
 682 static const struct attribute_group hwmon_pwm_fan_attrgroup = {
 683         .attrs = hwmon_pwm_fan_attributes,
 684 };
 685 #endif
 686
 687 static int
 688 nouveau_hwmon_init(struct drm_device *dev)
 689 {
 690 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 691         struct drm_nouveau_private *dev_priv = dev->dev_private;
 692         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 693         struct device *hwmon_dev;
 694         int ret = 0;
 695
 696         if (!pm->temp_get)
 697                 return -ENODEV;
 698
 699         hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 700         if (IS_ERR(hwmon_dev)) {
 701                 ret = PTR_ERR(hwmon_dev);
 702                 NV_ERROR(dev,
 703                         "Unable to register hwmon device: %d\n", ret);
 704                 return ret;
 705         }
 706         dev_set_drvdata(hwmon_dev, dev);
 707
 708         /* default sysfs entries */
 709         ret = sysfs_create_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 710         if (ret) {
 711                 if (ret)
 712                         goto error;
 713         }
 714
 715         /* if the card has a pwm fan */
 716         /*XXX: incorrect, need better detection for this, some boards have
 717          *     the gpio entries for pwm fan control even when there's no
 718          *     actual fan connected to it... therm table? */
 719         if (nouveau_pwmfan_get(dev) >= 0) {
 720                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 721                                          &hwmon_pwm_fan_attrgroup);
 722                 if (ret)
 723                         goto error;
 724         }
 725
 726         /* if the card can read the fan rpm */
 727         if (nouveau_bios_gpio_entry(dev, DCB_GPIO_FAN_SENSE)) {
 728                 ret = sysfs_create_group(&dev->pdev->dev.kobj,
 729                                          &hwmon_fan_rpm_attrgroup);
 730                 if (ret)
 731                         goto error;
 732         }
 733
 734         pm->hwmon = hwmon_dev;
 735
 736         return 0;
 737
 738 error:
 739         NV_ERROR(dev, "Unable to create some hwmon sysfs files: %d\n", ret);
 740         hwmon_device_unregister(hwmon_dev);
 741         pm->hwmon = NULL;
 742         return ret;
 743 #else
 744         pm->hwmon = NULL;
 745         return 0;
 746 #endif
 747 }
 748
 749 static void
 750 nouveau_hwmon_fini(struct drm_device *dev)
 751 {
 752 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 753         struct drm_nouveau_private *dev_priv = dev->dev_private;
 754         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 755
 756         if (pm->hwmon) {
 757                 sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 758                 sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_pwm_fan_attrgroup);
 759                 sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_fan_rpm_attrgroup);
 760
 761                 hwmon_device_unregister(pm->hwmon);
 762         }
 763 #endif
 764 }
 765
 766 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 767 static int
 768 nouveau_pm_acpi_event(struct notifier_block *nb, unsigned long val, void *data)
 769 {
 770         struct drm_nouveau_private *dev_priv =
 771                 container_of(nb, struct drm_nouveau_private, engine.pm.acpi_nb);
 772         struct drm_device *dev = dev_priv->dev;
 773         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
 774
 775         if (strcmp(entry->device_class, "ac_adapter") == 0) {
 776                 bool ac = power_supply_is_system_supplied();
 777
 778                 NV_DEBUG(dev, "power supply changed: %s\n", ac ? "AC" : "DC");
 779         }
 780
 781         return NOTIFY_OK;
 782 }
 783 #endif
 784
 785 int
 786 nouveau_pm_init(struct drm_device *dev)
 787 {
 788         struct drm_nouveau_private *dev_priv = dev->dev_private;
 789         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 790         char info[256];
 791         int ret, i;
 792
 793         nouveau_mem_timing_init(dev);
 794         nouveau_volt_init(dev);
 795         nouveau_perf_init(dev);
 796         nouveau_temp_init(dev);
 797
 798         NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
 799         for (i = 0; i < pm->nr_perflvl; i++) {
 800                 nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
 801                 NV_INFO(dev, "%d:%s", pm->perflvl[i].id, info);
 802         }
 803
 804         /* determine current ("boot") performance level */
 805         ret = nouveau_pm_perflvl_get(dev, &pm->boot);
 806         if (ret == 0) {
 807                 strncpy(pm->boot.name, "boot", 4);
 808                 pm->cur = &pm->boot;
 809
 810                 nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
 811                 NV_INFO(dev, "c:%s", info);
 812         }
 813
 814         /* switch performance levels now if requested */
 815         if (nouveau_perflvl != NULL) {
 816                 ret = nouveau_pm_profile_set(dev, nouveau_perflvl);
 817                 if (ret) {
 818                         NV_ERROR(dev, "error setting perflvl \"%s\": %d\n",
 819                                  nouveau_perflvl, ret);
 820                 }
 821         }
 822
 823         nouveau_sysfs_init(dev);
 824         nouveau_hwmon_init(dev);
 825 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 826         pm->acpi_nb.notifier_call = nouveau_pm_acpi_event;
 827         register_acpi_notifier(&pm->acpi_nb);
 828 #endif
 829
 830         return 0;
 831 }
 832
 833 void
 834 nouveau_pm_fini(struct drm_device *dev)
 835 {
 836         struct drm_nouveau_private *dev_priv = dev->dev_private;
 837         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 838
 839         if (pm->cur != &pm->boot)
 840                 nouveau_pm_perflvl_set(dev, &pm->boot);
 841
 842         nouveau_temp_fini(dev);
 843         nouveau_perf_fini(dev);
 844         nouveau_volt_fini(dev);
 845         nouveau_mem_timing_fini(dev);
 846
 847 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 848         unregister_acpi_notifier(&pm->acpi_nb);
 849 #endif
 850         nouveau_hwmon_fini(dev);
 851         nouveau_sysfs_fini(dev);
 852 }
 853
 854 void
 855 nouveau_pm_resume(struct drm_device *dev)
 856 {
 857         struct drm_nouveau_private *dev_priv = dev->dev_private;
 858         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 859         struct nouveau_pm_level *perflvl;
 860
 861         if (!pm->cur || pm->cur == &pm->boot)
 862                 return;
 863
 864         perflvl = pm->cur;
 865         pm->cur = &pm->boot;
 866         nouveau_pm_perflvl_set(dev, perflvl);
 867 }