1 /* $NetBSD: nouveau_hwmon.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $ */ 2 3 /* 4 * Copyright 2010 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: nouveau_hwmon.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $"); 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 #include "nouveau_drv.h" 38 #include "nouveau_hwmon.h" 39 40 #include <nvkm/subdev/iccsense.h> 41 #include <nvkm/subdev/volt.h> 42 43 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE)) 44 45 static ssize_t 46 nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d, 47 struct device_attribute *a, char *buf) 48 { 49 return snprintf(buf, PAGE_SIZE, "%d\n", 100); 50 } 51 static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, 0444, 52 nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0); 53 54 static ssize_t 55 nouveau_hwmon_temp1_auto_point1_temp(struct device *d, 56 struct device_attribute *a, char *buf) 57 { 58 struct drm_device *dev = dev_get_drvdata(d); 59 struct nouveau_drm *drm = nouveau_drm(dev); 60 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 61 62 return snprintf(buf, PAGE_SIZE, "%d\n", 63 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000); 64 } 65 static ssize_t 66 nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d, 67 struct device_attribute *a, 68 const char *buf, size_t count) 69 { 70 struct drm_device *dev = dev_get_drvdata(d); 71 struct nouveau_drm *drm = nouveau_drm(dev); 72 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 73 long value; 74 75 if (kstrtol(buf, 10, &value)) 76 return -EINVAL; 77 78 therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST, 79 value / 1000); 80 81 return count; 82 } 83 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, 0644, 84 nouveau_hwmon_temp1_auto_point1_temp, 85 nouveau_hwmon_set_temp1_auto_point1_temp, 0); 86 87 static ssize_t 88 nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device *d, 89 struct device_attribute *a, char *buf) 90 { 91 struct drm_device *dev = dev_get_drvdata(d); 92 struct nouveau_drm *drm = nouveau_drm(dev); 93 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 94 95 return snprintf(buf, PAGE_SIZE, "%d\n", 96 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000); 97 } 98 static ssize_t 99 nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d, 100 struct device_attribute *a, 101 const char *buf, size_t count) 102 { 103 struct drm_device *dev = dev_get_drvdata(d); 104 struct nouveau_drm *drm = nouveau_drm(dev); 105 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 106 long value; 107 108 if (kstrtol(buf, 10, &value)) 109 return -EINVAL; 110 111 therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST, 112 value / 1000); 113 114 return count; 115 } 116 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, 0644, 117 nouveau_hwmon_temp1_auto_point1_temp_hyst, 118 nouveau_hwmon_set_temp1_auto_point1_temp_hyst, 0); 119 120 static ssize_t 121 nouveau_hwmon_get_pwm1_max(struct device *d, 122 struct device_attribute *a, char *buf) 123 { 124 struct drm_device *dev = dev_get_drvdata(d); 125 struct nouveau_drm *drm = nouveau_drm(dev); 126 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 127 int ret; 128 129 ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY); 130 if (ret < 0) 131 return ret; 132 133 return sprintf(buf, "%i\n", ret); 134 } 135 136 static ssize_t 137 nouveau_hwmon_get_pwm1_min(struct device *d, 138 struct device_attribute *a, char *buf) 139 { 140 struct drm_device *dev = dev_get_drvdata(d); 141 struct nouveau_drm *drm = nouveau_drm(dev); 142 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 143 int ret; 144 145 ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY); 146 if (ret < 0) 147 return ret; 148 149 return sprintf(buf, "%i\n", ret); 150 } 151 152 static ssize_t 153 nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a, 154 const char *buf, size_t count) 155 { 156 struct drm_device *dev = dev_get_drvdata(d); 157 struct nouveau_drm *drm = nouveau_drm(dev); 158 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 159 long value; 160 int ret; 161 162 if (kstrtol(buf, 10, &value)) 163 return -EINVAL; 164 165 ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY, value); 166 if (ret < 0) 167 return ret; 168 169 return count; 170 } 171 static SENSOR_DEVICE_ATTR(pwm1_min, 0644, 172 nouveau_hwmon_get_pwm1_min, 173 nouveau_hwmon_set_pwm1_min, 0); 174 175 static ssize_t 176 nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a, 177 const char *buf, size_t count) 178 { 179 struct drm_device *dev = dev_get_drvdata(d); 180 struct nouveau_drm *drm = nouveau_drm(dev); 181 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 182 long value; 183 int ret; 184 185 if (kstrtol(buf, 10, &value)) 186 return -EINVAL; 187 188 ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY, value); 189 if (ret < 0) 190 return ret; 191 192 return count; 193 } 194 static SENSOR_DEVICE_ATTR(pwm1_max, 0644, 195 nouveau_hwmon_get_pwm1_max, 196 nouveau_hwmon_set_pwm1_max, 0); 197 198 static struct attribute *pwm_fan_sensor_attrs[] = { 199 &sensor_dev_attr_pwm1_min.dev_attr.attr, 200 &sensor_dev_attr_pwm1_max.dev_attr.attr, 201 NULL 202 }; 203 static const struct attribute_group pwm_fan_sensor_group = { 204 .attrs = pwm_fan_sensor_attrs, 205 }; 206 207 static struct attribute *temp1_auto_point_sensor_attrs[] = { 208 &sensor_dev_attr_temp1_auto_point1_pwm.dev_attr.attr, 209 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, 210 &sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr, 211 NULL 212 }; 213 static const struct attribute_group temp1_auto_point_sensor_group = { 214 .attrs = temp1_auto_point_sensor_attrs, 215 }; 216 217 #define N_ATTR_GROUPS 3 218 219 static const u32 nouveau_config_chip[] = { 220 HWMON_C_UPDATE_INTERVAL, 221 0 222 }; 223 224 static const u32 nouveau_config_in[] = { 225 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_LABEL, 226 0 227 }; 228 229 static const u32 nouveau_config_temp[] = { 230 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | 231 HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_EMERGENCY | 232 HWMON_T_EMERGENCY_HYST, 233 0 234 }; 235 236 static const u32 nouveau_config_fan[] = { 237 HWMON_F_INPUT, 238 0 239 }; 240 241 static const u32 nouveau_config_pwm[] = { 242 HWMON_PWM_INPUT | HWMON_PWM_ENABLE, 243 0 244 }; 245 246 static const u32 nouveau_config_power[] = { 247 HWMON_P_INPUT | HWMON_P_CAP_MAX | HWMON_P_CRIT, 248 0 249 }; 250 251 static const struct hwmon_channel_info nouveau_chip = { 252 .type = hwmon_chip, 253 .config = nouveau_config_chip, 254 }; 255 256 static const struct hwmon_channel_info nouveau_temp = { 257 .type = hwmon_temp, 258 .config = nouveau_config_temp, 259 }; 260 261 static const struct hwmon_channel_info nouveau_fan = { 262 .type = hwmon_fan, 263 .config = nouveau_config_fan, 264 }; 265 266 static const struct hwmon_channel_info nouveau_in = { 267 .type = hwmon_in, 268 .config = nouveau_config_in, 269 }; 270 271 static const struct hwmon_channel_info nouveau_pwm = { 272 .type = hwmon_pwm, 273 .config = nouveau_config_pwm, 274 }; 275 276 static const struct hwmon_channel_info nouveau_power = { 277 .type = hwmon_power, 278 .config = nouveau_config_power, 279 }; 280 281 static const struct hwmon_channel_info *nouveau_info[] = { 282 &nouveau_chip, 283 &nouveau_temp, 284 &nouveau_fan, 285 &nouveau_in, 286 &nouveau_pwm, 287 &nouveau_power, 288 NULL 289 }; 290 291 static umode_t 292 nouveau_chip_is_visible(const void *data, u32 attr, int channel) 293 { 294 switch (attr) { 295 case hwmon_chip_update_interval: 296 return 0444; 297 default: 298 return 0; 299 } 300 } 301 302 static umode_t 303 nouveau_power_is_visible(const void *data, u32 attr, int channel) 304 { 305 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 306 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device); 307 308 if (!iccsense || !iccsense->data_valid || list_empty(&iccsense->rails)) 309 return 0; 310 311 switch (attr) { 312 case hwmon_power_input: 313 return 0444; 314 case hwmon_power_max: 315 if (iccsense->power_w_max) 316 return 0444; 317 return 0; 318 case hwmon_power_crit: 319 if (iccsense->power_w_crit) 320 return 0444; 321 return 0; 322 default: 323 return 0; 324 } 325 } 326 327 static umode_t 328 nouveau_temp_is_visible(const void *data, u32 attr, int channel) 329 { 330 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 331 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 332 333 if (!therm || !therm->attr_get || nvkm_therm_temp_get(therm) < 0) 334 return 0; 335 336 switch (attr) { 337 case hwmon_temp_input: 338 return 0444; 339 case hwmon_temp_max: 340 case hwmon_temp_max_hyst: 341 case hwmon_temp_crit: 342 case hwmon_temp_crit_hyst: 343 case hwmon_temp_emergency: 344 case hwmon_temp_emergency_hyst: 345 return 0644; 346 default: 347 return 0; 348 } 349 } 350 351 static umode_t 352 nouveau_pwm_is_visible(const void *data, u32 attr, int channel) 353 { 354 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 355 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 356 357 if (!therm || !therm->attr_get || !therm->fan_get || 358 therm->fan_get(therm) < 0) 359 return 0; 360 361 switch (attr) { 362 case hwmon_pwm_enable: 363 case hwmon_pwm_input: 364 return 0644; 365 default: 366 return 0; 367 } 368 } 369 370 static umode_t 371 nouveau_input_is_visible(const void *data, u32 attr, int channel) 372 { 373 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 374 struct nvkm_volt *volt = nvxx_volt(&drm->client.device); 375 376 if (!volt || nvkm_volt_get(volt) < 0) 377 return 0; 378 379 switch (attr) { 380 case hwmon_in_input: 381 case hwmon_in_label: 382 case hwmon_in_min: 383 case hwmon_in_max: 384 return 0444; 385 default: 386 return 0; 387 } 388 } 389 390 static umode_t 391 nouveau_fan_is_visible(const void *data, u32 attr, int channel) 392 { 393 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 394 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 395 396 if (!therm || !therm->attr_get || nvkm_therm_fan_sense(therm) < 0) 397 return 0; 398 399 switch (attr) { 400 case hwmon_fan_input: 401 return 0444; 402 default: 403 return 0; 404 } 405 } 406 407 static int 408 nouveau_chip_read(struct device *dev, u32 attr, int channel, long *val) 409 { 410 switch (attr) { 411 case hwmon_chip_update_interval: 412 *val = 1000; 413 break; 414 default: 415 return -EOPNOTSUPP; 416 } 417 418 return 0; 419 } 420 421 static int 422 nouveau_temp_read(struct device *dev, u32 attr, int channel, long *val) 423 { 424 struct drm_device *drm_dev = dev_get_drvdata(dev); 425 struct nouveau_drm *drm = nouveau_drm(drm_dev); 426 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 427 int ret; 428 429 if (!therm || !therm->attr_get) 430 return -EOPNOTSUPP; 431 432 switch (attr) { 433 case hwmon_temp_input: 434 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 435 return -EINVAL; 436 ret = nvkm_therm_temp_get(therm); 437 *val = ret < 0 ? ret : (ret * 1000); 438 break; 439 case hwmon_temp_max: 440 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK) 441 * 1000; 442 break; 443 case hwmon_temp_max_hyst: 444 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST) 445 * 1000; 446 break; 447 case hwmon_temp_crit: 448 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL) 449 * 1000; 450 break; 451 case hwmon_temp_crit_hyst: 452 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST) 453 * 1000; 454 break; 455 case hwmon_temp_emergency: 456 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN) 457 * 1000; 458 break; 459 case hwmon_temp_emergency_hyst: 460 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST) 461 * 1000; 462 break; 463 default: 464 return -EOPNOTSUPP; 465 } 466 467 return 0; 468 } 469 470 static int 471 nouveau_fan_read(struct device *dev, u32 attr, int channel, long *val) 472 { 473 struct drm_device *drm_dev = dev_get_drvdata(dev); 474 struct nouveau_drm *drm = nouveau_drm(drm_dev); 475 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 476 477 if (!therm) 478 return -EOPNOTSUPP; 479 480 switch (attr) { 481 case hwmon_fan_input: 482 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 483 return -EINVAL; 484 *val = nvkm_therm_fan_sense(therm); 485 break; 486 default: 487 return -EOPNOTSUPP; 488 } 489 490 return 0; 491 } 492 493 static int 494 nouveau_in_read(struct device *dev, u32 attr, int channel, long *val) 495 { 496 struct drm_device *drm_dev = dev_get_drvdata(dev); 497 struct nouveau_drm *drm = nouveau_drm(drm_dev); 498 struct nvkm_volt *volt = nvxx_volt(&drm->client.device); 499 int ret; 500 501 if (!volt) 502 return -EOPNOTSUPP; 503 504 switch (attr) { 505 case hwmon_in_input: 506 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 507 return -EINVAL; 508 ret = nvkm_volt_get(volt); 509 *val = ret < 0 ? ret : (ret / 1000); 510 break; 511 case hwmon_in_min: 512 *val = volt->min_uv > 0 ? (volt->min_uv / 1000) : -ENODEV; 513 break; 514 case hwmon_in_max: 515 *val = volt->max_uv > 0 ? (volt->max_uv / 1000) : -ENODEV; 516 break; 517 default: 518 return -EOPNOTSUPP; 519 } 520 521 return 0; 522 } 523 524 static int 525 nouveau_pwm_read(struct device *dev, u32 attr, int channel, long *val) 526 { 527 struct drm_device *drm_dev = dev_get_drvdata(dev); 528 struct nouveau_drm *drm = nouveau_drm(drm_dev); 529 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 530 531 if (!therm || !therm->attr_get || !therm->fan_get) 532 return -EOPNOTSUPP; 533 534 switch (attr) { 535 case hwmon_pwm_enable: 536 *val = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MODE); 537 break; 538 case hwmon_pwm_input: 539 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 540 return -EINVAL; 541 *val = therm->fan_get(therm); 542 break; 543 default: 544 return -EOPNOTSUPP; 545 } 546 547 return 0; 548 } 549 550 static int 551 nouveau_power_read(struct device *dev, u32 attr, int channel, long *val) 552 { 553 struct drm_device *drm_dev = dev_get_drvdata(dev); 554 struct nouveau_drm *drm = nouveau_drm(drm_dev); 555 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device); 556 557 if (!iccsense) 558 return -EOPNOTSUPP; 559 560 switch (attr) { 561 case hwmon_power_input: 562 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 563 return -EINVAL; 564 *val = nvkm_iccsense_read_all(iccsense); 565 break; 566 case hwmon_power_max: 567 *val = iccsense->power_w_max; 568 break; 569 case hwmon_power_crit: 570 *val = iccsense->power_w_crit; 571 break; 572 default: 573 return -EOPNOTSUPP; 574 } 575 576 return 0; 577 } 578 579 static int 580 nouveau_temp_write(struct device *dev, u32 attr, int channel, long val) 581 { 582 struct drm_device *drm_dev = dev_get_drvdata(dev); 583 struct nouveau_drm *drm = nouveau_drm(drm_dev); 584 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 585 586 if (!therm || !therm->attr_set) 587 return -EOPNOTSUPP; 588 589 switch (attr) { 590 case hwmon_temp_max: 591 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK, 592 val / 1000); 593 case hwmon_temp_max_hyst: 594 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST, 595 val / 1000); 596 case hwmon_temp_crit: 597 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL, 598 val / 1000); 599 case hwmon_temp_crit_hyst: 600 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST, 601 val / 1000); 602 case hwmon_temp_emergency: 603 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN, 604 val / 1000); 605 case hwmon_temp_emergency_hyst: 606 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST, 607 val / 1000); 608 default: 609 return -EOPNOTSUPP; 610 } 611 } 612 613 static int 614 nouveau_pwm_write(struct device *dev, u32 attr, int channel, long val) 615 { 616 struct drm_device *drm_dev = dev_get_drvdata(dev); 617 struct nouveau_drm *drm = nouveau_drm(drm_dev); 618 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 619 620 if (!therm || !therm->attr_set) 621 return -EOPNOTSUPP; 622 623 switch (attr) { 624 case hwmon_pwm_input: 625 return therm->fan_set(therm, val); 626 case hwmon_pwm_enable: 627 return therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MODE, val); 628 default: 629 return -EOPNOTSUPP; 630 } 631 } 632 633 static umode_t 634 nouveau_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, 635 int channel) 636 { 637 switch (type) { 638 case hwmon_chip: 639 return nouveau_chip_is_visible(data, attr, channel); 640 case hwmon_temp: 641 return nouveau_temp_is_visible(data, attr, channel); 642 case hwmon_fan: 643 return nouveau_fan_is_visible(data, attr, channel); 644 case hwmon_in: 645 return nouveau_input_is_visible(data, attr, channel); 646 case hwmon_pwm: 647 return nouveau_pwm_is_visible(data, attr, channel); 648 case hwmon_power: 649 return nouveau_power_is_visible(data, attr, channel); 650 default: 651 return 0; 652 } 653 } 654 655 static const char input_label[] = "GPU core"; 656 657 static int 658 nouveau_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, 659 int channel, const char **buf) 660 { 661 if (type == hwmon_in && attr == hwmon_in_label) { 662 *buf = input_label; 663 return 0; 664 } 665 666 return -EOPNOTSUPP; 667 } 668 669 static int 670 nouveau_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, 671 int channel, long *val) 672 { 673 switch (type) { 674 case hwmon_chip: 675 return nouveau_chip_read(dev, attr, channel, val); 676 case hwmon_temp: 677 return nouveau_temp_read(dev, attr, channel, val); 678 case hwmon_fan: 679 return nouveau_fan_read(dev, attr, channel, val); 680 case hwmon_in: 681 return nouveau_in_read(dev, attr, channel, val); 682 case hwmon_pwm: 683 return nouveau_pwm_read(dev, attr, channel, val); 684 case hwmon_power: 685 return nouveau_power_read(dev, attr, channel, val); 686 default: 687 return -EOPNOTSUPP; 688 } 689 } 690 691 static int 692 nouveau_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, 693 int channel, long val) 694 { 695 switch (type) { 696 case hwmon_temp: 697 return nouveau_temp_write(dev, attr, channel, val); 698 case hwmon_pwm: 699 return nouveau_pwm_write(dev, attr, channel, val); 700 default: 701 return -EOPNOTSUPP; 702 } 703 } 704 705 static const struct hwmon_ops nouveau_hwmon_ops = { 706 .is_visible = nouveau_is_visible, 707 .read = nouveau_read, 708 .read_string = nouveau_read_string, 709 .write = nouveau_write, 710 }; 711 712 static const struct hwmon_chip_info nouveau_chip_info = { 713 .ops = &nouveau_hwmon_ops, 714 .info = nouveau_info, 715 }; 716 #endif 717 718 int 719 nouveau_hwmon_init(struct drm_device *dev) 720 { 721 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE)) 722 struct nouveau_drm *drm = nouveau_drm(dev); 723 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device); 724 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 725 struct nvkm_volt *volt = nvxx_volt(&drm->client.device); 726 const struct attribute_group *special_groups[N_ATTR_GROUPS]; 727 struct nouveau_hwmon *hwmon; 728 struct device *hwmon_dev; 729 int ret = 0; 730 int i = 0; 731 732 if (!iccsense && !therm && !volt) { 733 NV_DEBUG(drm, "Skipping hwmon registration\n"); 734 return 0; 735 } 736 737 hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL); 738 if (!hwmon) 739 return -ENOMEM; 740 hwmon->dev = dev; 741 742 if (therm && therm->attr_get && therm->attr_set) { 743 if (nvkm_therm_temp_get(therm) >= 0) 744 special_groups[i++] = &temp1_auto_point_sensor_group; 745 if (therm->fan_get && therm->fan_get(therm) >= 0) 746 special_groups[i++] = &pwm_fan_sensor_group; 747 } 748 749 special_groups[i] = NULL; 750 hwmon_dev = hwmon_device_register_with_info(dev->dev, "nouveau", dev, 751 &nouveau_chip_info, 752 special_groups); 753 if (IS_ERR(hwmon_dev)) { 754 ret = PTR_ERR(hwmon_dev); 755 NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret); 756 return ret; 757 } 758 759 hwmon->hwmon = hwmon_dev; 760 return 0; 761 #else 762 return 0; 763 #endif 764 } 765 766 void 767 nouveau_hwmon_fini(struct drm_device *dev) 768 { 769 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE)) 770 struct nouveau_hwmon *hwmon = nouveau_hwmon(dev); 771 772 if (!hwmon) 773 return; 774 775 if (hwmon->hwmon) 776 hwmon_device_unregister(hwmon->hwmon); 777 778 nouveau_drm(dev)->hwmon = NULL; 779 kfree(hwmon); 780 #endif 781 } 782
Indexes created Sat Sep 20 22:09:52 GMT 2025