xref: /netbsd-src/sys/external/bsd/drm2/dist/drm/nouveau/nouveau_hwmon.c (revision 41ec02673d281bbb3d38e6c78504ce6e30c228c1)
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