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_pm_clock_set(struct drm_device *dev, struct nouveau_pm_level *perflvl,
  39                      u8 id, u32 khz)
  40 {
  41         struct drm_nouveau_private *dev_priv = dev->dev_private;
  42         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
  43         void *pre_state;
  44
  45         if (khz == 0)
  46                 return 0;
  47
  48         pre_state = pm->clock_pre(dev, perflvl, id, khz);
  49         if (IS_ERR(pre_state))
  50                 return PTR_ERR(pre_state);
  51
  52         if (pre_state)
  53                 pm->clock_set(dev, pre_state);
  54         return 0;
  55 }
  56
  57 static int
  58 nouveau_pm_perflvl_set(struct drm_device *dev, struct nouveau_pm_level *perflvl)
  59 {
  60         struct drm_nouveau_private *dev_priv = dev->dev_private;
  61         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
  62         int ret;
  63
  64         if (perflvl == pm->cur)
  65                 return 0;
  66
  67         if (pm->voltage.supported && pm->voltage_set && perflvl->voltage) {
  68                 ret = pm->voltage_set(dev, perflvl->voltage);
  69                 if (ret) {
  70                         NV_ERROR(dev, "voltage_set %d failed: %d\n",
  71                                  perflvl->voltage, ret);
  72                 }
  73         }
  74
  75         nouveau_pm_clock_set(dev, perflvl, PLL_CORE, perflvl->core);
  76         nouveau_pm_clock_set(dev, perflvl, PLL_SHADER, perflvl->shader);
  77         nouveau_pm_clock_set(dev, perflvl, PLL_MEMORY, perflvl->memory);
  78         nouveau_pm_clock_set(dev, perflvl, PLL_UNK05, perflvl->unk05);
  79
  80         pm->cur = perflvl;
  81         return 0;
  82 }
  83
  84 static int
  85 nouveau_pm_profile_set(struct drm_device *dev, const char *profile)
  86 {
  87         struct drm_nouveau_private *dev_priv = dev->dev_private;
  88         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
  89         struct nouveau_pm_level *perflvl = NULL;
  90
  91         /* safety precaution, for now */
  92         if (nouveau_perflvl_wr != 7777)
  93                 return -EPERM;
  94
  95         if (!pm->clock_set)
  96                 return -EINVAL;
  97
  98         if (!strncmp(profile, "boot", 4))
  99                 perflvl = &pm->boot;
 100         else {
 101                 int pl = simple_strtol(profile, NULL, 10);
 102                 int i;
 103
 104                 for (i = 0; i < pm->nr_perflvl; i++) {
 105                         if (pm->perflvl[i].id == pl) {
 106                                 perflvl = &pm->perflvl[i];
 107                                 break;
 108                         }
 109                 }
 110
 111                 if (!perflvl)
 112                         return -EINVAL;
 113         }
 114
 115         NV_INFO(dev, "setting performance level: %s\n", profile);
 116         return nouveau_pm_perflvl_set(dev, perflvl);
 117 }
 118
 119 static int
 120 nouveau_pm_perflvl_get(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 (!pm->clock_get)
 127                 return -EINVAL;
 128
 129         memset(perflvl, 0, sizeof(*perflvl));
 130
 131         ret = pm->clock_get(dev, PLL_CORE);
 132         if (ret > 0)
 133                 perflvl->core = ret;
 134
 135         ret = pm->clock_get(dev, PLL_MEMORY);
 136         if (ret > 0)
 137                 perflvl->memory = ret;
 138
 139         ret = pm->clock_get(dev, PLL_SHADER);
 140         if (ret > 0)
 141                 perflvl->shader = ret;
 142
 143         ret = pm->clock_get(dev, PLL_UNK05);
 144         if (ret > 0)
 145                 perflvl->unk05 = ret;
 146
 147         if (pm->voltage.supported && pm->voltage_get) {
 148                 ret = pm->voltage_get(dev);
 149                 if (ret > 0)
 150                         perflvl->voltage = ret;
 151         }
 152
 153         return 0;
 154 }
 155
 156 static void
 157 nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
 158 {
 159         char c[16], s[16], v[16], f[16], t[16];
 160
 161         c[0] = '\0';
 162         if (perflvl->core)
 163                 snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
 164
 165         s[0] = '\0';
 166         if (perflvl->shader)
 167                 snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);
 168
 169         v[0] = '\0';
 170         if (perflvl->voltage)
 171                 snprintf(v, sizeof(v), " voltage %dmV", perflvl->voltage * 10);
 172
 173         f[0] = '\0';
 174         if (perflvl->fanspeed)
 175                 snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
 176
 177         t[0] = '\0';
 178         if (perflvl->timing)
 179                 snprintf(t, sizeof(t), " timing %d", perflvl->timing->id);
 180
 181         snprintf(ptr, len, "memory %dMHz%s%s%s%s%s\n", perflvl->memory / 1000,
 182                  c, s, v, f, t);
 183 }
 184
 185 static ssize_t
 186 nouveau_pm_get_perflvl_info(struct device *d,
 187                             struct device_attribute *a, char *buf)
 188 {
 189         struct nouveau_pm_level *perflvl = (struct nouveau_pm_level *)a;
 190         char *ptr = buf;
 191         int len = PAGE_SIZE;
 192
 193         snprintf(ptr, len, "%d: ", perflvl->id);
 194         ptr += strlen(buf);
 195         len -= strlen(buf);
 196
 197         nouveau_pm_perflvl_info(perflvl, ptr, len);
 198         return strlen(buf);
 199 }
 200
 201 static ssize_t
 202 nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
 203 {
 204         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 205         struct drm_nouveau_private *dev_priv = dev->dev_private;
 206         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 207         struct nouveau_pm_level cur;
 208         int len = PAGE_SIZE, ret;
 209         char *ptr = buf;
 210
 211         if (!pm->cur)
 212                 snprintf(ptr, len, "setting: boot\n");
 213         else if (pm->cur == &pm->boot)
 214                 snprintf(ptr, len, "setting: boot\nc: ");
 215         else
 216                 snprintf(ptr, len, "setting: static %d\nc: ", pm->cur->id);
 217         ptr += strlen(buf);
 218         len -= strlen(buf);
 219
 220         ret = nouveau_pm_perflvl_get(dev, &cur);
 221         if (ret == 0)
 222                 nouveau_pm_perflvl_info(&cur, ptr, len);
 223         return strlen(buf);
 224 }
 225
 226 static ssize_t
 227 nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
 228                        const char *buf, size_t count)
 229 {
 230         struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
 231         int ret;
 232
 233         ret = nouveau_pm_profile_set(dev, buf);
 234         if (ret)
 235                 return ret;
 236         return strlen(buf);
 237 }
 238
 239 static DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
 240                    nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);
 241
 242 static int
 243 nouveau_sysfs_init(struct drm_device *dev)
 244 {
 245         struct drm_nouveau_private *dev_priv = dev->dev_private;
 246         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 247         struct device *d = &dev->pdev->dev;
 248         int ret, i;
 249
 250         ret = device_create_file(d, &dev_attr_performance_level);
 251         if (ret)
 252                 return ret;
 253
 254         for (i = 0; i < pm->nr_perflvl; i++) {
 255                 struct nouveau_pm_level *perflvl = &pm->perflvl[i];
 256
 257                 perflvl->dev_attr.attr.name = perflvl->name;
 258                 perflvl->dev_attr.attr.mode = S_IRUGO;
 259                 perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
 260                 perflvl->dev_attr.store = NULL;
 261                 sysfs_attr_init(&perflvl->dev_attr.attr);
 262
 263                 ret = device_create_file(d, &perflvl->dev_attr);
 264                 if (ret) {
 265                         NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
 266                                  perflvl->id, i);
 267                         perflvl->dev_attr.attr.name = NULL;
 268                         nouveau_pm_fini(dev);
 269                         return ret;
 270                 }
 271         }
 272
 273         return 0;
 274 }
 275
 276 static void
 277 nouveau_sysfs_fini(struct drm_device *dev)
 278 {
 279         struct drm_nouveau_private *dev_priv = dev->dev_private;
 280         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 281         struct device *d = &dev->pdev->dev;
 282         int i;
 283
 284         device_remove_file(d, &dev_attr_performance_level);
 285         for (i = 0; i < pm->nr_perflvl; i++) {
 286                 struct nouveau_pm_level *pl = &pm->perflvl[i];
 287
 288                 if (!pl->dev_attr.attr.name)
 289                         break;
 290
 291                 device_remove_file(d, &pl->dev_attr);
 292         }
 293 }
 294
 295 #ifdef CONFIG_HWMON
 296 static ssize_t
 297 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
 298 {
 299         struct drm_device *dev = dev_get_drvdata(d);
 300         struct drm_nouveau_private *dev_priv = dev->dev_private;
 301         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 302
 303         return snprintf(buf, PAGE_SIZE, "%d\n", pm->temp_get(dev)*1000);
 304 }
 305 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
 306                                                   NULL, 0);
 307
 308 static ssize_t
 309 nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
 310 {
 311         struct drm_device *dev = dev_get_drvdata(d);
 312         struct drm_nouveau_private *dev_priv = dev->dev_private;
 313         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 314         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 315
 316         return snprintf(buf, PAGE_SIZE, "%d\n", temp->down_clock*1000);
 317 }
 318 static ssize_t
 319 nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
 320                                                 const char *buf, size_t count)
 321 {
 322         struct drm_device *dev = dev_get_drvdata(d);
 323         struct drm_nouveau_private *dev_priv = dev->dev_private;
 324         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 325         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 326         long value;
 327
 328         if (strict_strtol(buf, 10, &value) == -EINVAL)
 329                 return count;
 330
 331         temp->down_clock = value/1000;
 332
 333         nouveau_temp_safety_checks(dev);
 334
 335         return count;
 336 }
 337 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
 338                                                   nouveau_hwmon_set_max_temp,
 339                                                   0);
 340
 341 static ssize_t
 342 nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
 343                                                         char *buf)
 344 {
 345         struct drm_device *dev = dev_get_drvdata(d);
 346         struct drm_nouveau_private *dev_priv = dev->dev_private;
 347         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 348         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 349
 350         return snprintf(buf, PAGE_SIZE, "%d\n", temp->critical*1000);
 351 }
 352 static ssize_t
 353 nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
 354                                                             const char *buf,
 355                                                                 size_t count)
 356 {
 357         struct drm_device *dev = dev_get_drvdata(d);
 358         struct drm_nouveau_private *dev_priv = dev->dev_private;
 359         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 360         struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
 361         long value;
 362
 363         if (strict_strtol(buf, 10, &value) == -EINVAL)
 364                 return count;
 365
 366         temp->critical = value/1000;
 367
 368         nouveau_temp_safety_checks(dev);
 369
 370         return count;
 371 }
 372 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
 373                                                 nouveau_hwmon_critical_temp,
 374                                                 nouveau_hwmon_set_critical_temp,
 375                                                 0);
 376
 377 static ssize_t nouveau_hwmon_show_name(struct device *dev,
 378                                       struct device_attribute *attr,
 379                                       char *buf)
 380 {
 381         return sprintf(buf, "nouveau\n");
 382 }
 383 static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
 384
 385 static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
 386                                       struct device_attribute *attr,
 387                                       char *buf)
 388 {
 389         return sprintf(buf, "1000\n");
 390 }
 391 static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
 392                                                 nouveau_hwmon_show_update_rate,
 393                                                 NULL, 0);
 394
 395 static struct attribute *hwmon_attributes[] = {
 396         &sensor_dev_attr_temp1_input.dev_attr.attr,
 397         &sensor_dev_attr_temp1_max.dev_attr.attr,
 398         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 399         &sensor_dev_attr_name.dev_attr.attr,
 400         &sensor_dev_attr_update_rate.dev_attr.attr,
 401         NULL
 402 };
 403
 404 static const struct attribute_group hwmon_attrgroup = {
 405         .attrs = hwmon_attributes,
 406 };
 407 #endif
 408
 409 static int
 410 nouveau_hwmon_init(struct drm_device *dev)
 411 {
 412 #ifdef CONFIG_HWMON
 413         struct drm_nouveau_private *dev_priv = dev->dev_private;
 414         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 415         struct device *hwmon_dev;
 416         int ret;
 417
 418         if (!pm->temp_get)
 419                 return -ENODEV;
 420
 421         hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 422         if (IS_ERR(hwmon_dev)) {
 423                 ret = PTR_ERR(hwmon_dev);
 424                 NV_ERROR(dev,
 425                         "Unable to register hwmon device: %d\n", ret);
 426                 return ret;
 427         }
 428         dev_set_drvdata(hwmon_dev, dev);
 429         ret = sysfs_create_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 430         if (ret) {
 431                 NV_ERROR(dev,
 432                         "Unable to create hwmon sysfs file: %d\n", ret);
 433                 hwmon_device_unregister(hwmon_dev);
 434                 return ret;
 435         }
 436
 437         pm->hwmon = hwmon_dev;
 438 #endif
 439         return 0;
 440 }
 441
 442 static void
 443 nouveau_hwmon_fini(struct drm_device *dev)
 444 {
 445 #ifdef CONFIG_HWMON
 446         struct drm_nouveau_private *dev_priv = dev->dev_private;
 447         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 448
 449         if (pm->hwmon) {
 450                 sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
 451                 hwmon_device_unregister(pm->hwmon);
 452         }
 453 #endif
 454 }
 455
 456 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 457 static int
 458 nouveau_pm_acpi_event(struct notifier_block *nb, unsigned long val, void *data)
 459 {
 460         struct drm_nouveau_private *dev_priv =
 461                 container_of(nb, struct drm_nouveau_private, engine.pm.acpi_nb);
 462         struct drm_device *dev = dev_priv->dev;
 463         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
 464
 465         if (strcmp(entry->device_class, "ac_adapter") == 0) {
 466                 bool ac = power_supply_is_system_supplied();
 467
 468                 NV_DEBUG(dev, "power supply changed: %s\n", ac ? "AC" : "DC");
 469         }
 470
 471         return NOTIFY_OK;
 472 }
 473 #endif
 474
 475 int
 476 nouveau_pm_init(struct drm_device *dev)
 477 {
 478         struct drm_nouveau_private *dev_priv = dev->dev_private;
 479         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 480         char info[256];
 481         int ret, i;
 482
 483         nouveau_mem_timing_init(dev);
 484         nouveau_volt_init(dev);
 485         nouveau_perf_init(dev);
 486         nouveau_temp_init(dev);
 487
 488         NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
 489         for (i = 0; i < pm->nr_perflvl; i++) {
 490                 nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
 491                 NV_INFO(dev, "%d: %s", pm->perflvl[i].id, info);
 492         }
 493
 494         /* determine current ("boot") performance level */
 495         ret = nouveau_pm_perflvl_get(dev, &pm->boot);
 496         if (ret == 0) {
 497                 strncpy(pm->boot.name, "boot", 4);
 498                 pm->cur = &pm->boot;
 499
 500                 nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
 501                 NV_INFO(dev, "c: %s", info);
 502         }
 503
 504         /* switch performance levels now if requested */
 505         if (nouveau_perflvl != NULL) {
 506                 ret = nouveau_pm_profile_set(dev, nouveau_perflvl);
 507                 if (ret) {
 508                         NV_ERROR(dev, "error setting perflvl \"%s\": %d\n",
 509                                  nouveau_perflvl, ret);
 510                 }
 511         }
 512
 513         nouveau_sysfs_init(dev);
 514         nouveau_hwmon_init(dev);
 515 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 516         pm->acpi_nb.notifier_call = nouveau_pm_acpi_event;
 517         register_acpi_notifier(&pm->acpi_nb);
 518 #endif
 519
 520         return 0;
 521 }
 522
 523 void
 524 nouveau_pm_fini(struct drm_device *dev)
 525 {
 526         struct drm_nouveau_private *dev_priv = dev->dev_private;
 527         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 528
 529         if (pm->cur != &pm->boot)
 530                 nouveau_pm_perflvl_set(dev, &pm->boot);
 531
 532         nouveau_temp_fini(dev);
 533         nouveau_perf_fini(dev);
 534         nouveau_volt_fini(dev);
 535         nouveau_mem_timing_fini(dev);
 536
 537 #if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
 538         unregister_acpi_notifier(&pm->acpi_nb);
 539 #endif
 540         nouveau_hwmon_fini(dev);
 541         nouveau_sysfs_fini(dev);
 542 }
 543
 544 void
 545 nouveau_pm_resume(struct drm_device *dev)
 546 {
 547         struct drm_nouveau_private *dev_priv = dev->dev_private;
 548         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 549         struct nouveau_pm_level *perflvl;
 550
 551         if (!pm->cur || pm->cur == &pm->boot)
 552                 return;
 553
 554         perflvl = pm->cur;
 555         pm->cur = &pm->boot;
 556         nouveau_pm_perflvl_set(dev, perflvl);
 557 }