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
nouveau_hwmon_show_temp1_auto_point1_pwm(struct device * d,struct device_attribute * a,char * buf)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
nouveau_hwmon_temp1_auto_point1_temp(struct device * d,struct device_attribute * a,char * buf)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
nouveau_hwmon_set_temp1_auto_point1_temp(struct device * d,struct device_attribute * a,const char * buf,size_t count)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
nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device * d,struct device_attribute * a,char * buf)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
nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device * d,struct device_attribute * a,const char * buf,size_t count)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
nouveau_hwmon_get_pwm1_max(struct device * d,struct device_attribute * a,char * buf)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
nouveau_hwmon_get_pwm1_min(struct device * d,struct device_attribute * a,char * buf)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
nouveau_hwmon_set_pwm1_min(struct device * d,struct device_attribute * a,const char * buf,size_t count)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
nouveau_hwmon_set_pwm1_max(struct device * d,struct device_attribute * a,const char * buf,size_t count)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
nouveau_chip_is_visible(const void * data,u32 attr,int channel)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
nouveau_power_is_visible(const void * data,u32 attr,int channel)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
nouveau_temp_is_visible(const void * data,u32 attr,int channel)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
nouveau_pwm_is_visible(const void * data,u32 attr,int channel)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
nouveau_input_is_visible(const void * data,u32 attr,int channel)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
nouveau_fan_is_visible(const void * data,u32 attr,int channel)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
nouveau_chip_read(struct device * dev,u32 attr,int channel,long * val)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
nouveau_temp_read(struct device * dev,u32 attr,int channel,long * val)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
nouveau_fan_read(struct device * dev,u32 attr,int channel,long * val)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
nouveau_in_read(struct device * dev,u32 attr,int channel,long * val)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
nouveau_pwm_read(struct device * dev,u32 attr,int channel,long * val)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
nouveau_power_read(struct device * dev,u32 attr,int channel,long * val)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
nouveau_temp_write(struct device * dev,u32 attr,int channel,long val)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
nouveau_pwm_write(struct device * dev,u32 attr,int channel,long val)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
nouveau_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)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
nouveau_read_string(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,const char ** buf)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
nouveau_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)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
nouveau_write(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long val)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
nouveau_hwmon_init(struct drm_device * dev)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
nouveau_hwmon_fini(struct drm_device * dev)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