drm/nouveau/therm: convert to new-style nvkm_subdev
[pandora-kernel.git] / drivers / gpu / drm / nouveau / nvkm / subdev / therm / base.c
1 /*
2  * Copyright 2012 The Nouveau community
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: Martin Peres
23  */
24 #include "priv.h"
25
26 int
27 nvkm_therm_temp_get(struct nvkm_therm *therm)
28 {
29         if (therm->func->temp_get)
30                 return therm->func->temp_get(therm);
31         return -ENODEV;
32 }
33
34 static int
35 nvkm_therm_update_trip(struct nvkm_therm *therm)
36 {
37         struct nvbios_therm_trip_point *trip = therm->fan->bios.trip,
38                                        *cur_trip = NULL,
39                                        *last_trip = therm->last_trip;
40         u8  temp = therm->func->temp_get(therm);
41         u16 duty, i;
42
43         /* look for the trip point corresponding to the current temperature */
44         cur_trip = NULL;
45         for (i = 0; i < therm->fan->bios.nr_fan_trip; i++) {
46                 if (temp >= trip[i].temp)
47                         cur_trip = &trip[i];
48         }
49
50         /* account for the hysteresis cycle */
51         if (last_trip && temp <= (last_trip->temp) &&
52             temp > (last_trip->temp - last_trip->hysteresis))
53                 cur_trip = last_trip;
54
55         if (cur_trip) {
56                 duty = cur_trip->fan_duty;
57                 therm->last_trip = cur_trip;
58         } else {
59                 duty = 0;
60                 therm->last_trip = NULL;
61         }
62
63         return duty;
64 }
65
66 static int
67 nvkm_therm_update_linear(struct nvkm_therm *therm)
68 {
69         u8  linear_min_temp = therm->fan->bios.linear_min_temp;
70         u8  linear_max_temp = therm->fan->bios.linear_max_temp;
71         u8  temp = therm->func->temp_get(therm);
72         u16 duty;
73
74         /* handle the non-linear part first */
75         if (temp < linear_min_temp)
76                 return therm->fan->bios.min_duty;
77         else if (temp > linear_max_temp)
78                 return therm->fan->bios.max_duty;
79
80         /* we are in the linear zone */
81         duty  = (temp - linear_min_temp);
82         duty *= (therm->fan->bios.max_duty - therm->fan->bios.min_duty);
83         duty /= (linear_max_temp - linear_min_temp);
84         duty += therm->fan->bios.min_duty;
85         return duty;
86 }
87
88 static void
89 nvkm_therm_update(struct nvkm_therm *therm, int mode)
90 {
91         struct nvkm_subdev *subdev = &therm->subdev;
92         struct nvkm_timer *tmr = subdev->device->timer;
93         unsigned long flags;
94         bool immd = true;
95         bool poll = true;
96         int duty = -1;
97
98         spin_lock_irqsave(&therm->lock, flags);
99         if (mode < 0)
100                 mode = therm->mode;
101         therm->mode = mode;
102
103         switch (mode) {
104         case NVKM_THERM_CTRL_MANUAL:
105                 tmr->alarm_cancel(tmr, &therm->alarm);
106                 duty = nvkm_therm_fan_get(therm);
107                 if (duty < 0)
108                         duty = 100;
109                 poll = false;
110                 break;
111         case NVKM_THERM_CTRL_AUTO:
112                 switch(therm->fan->bios.fan_mode) {
113                 case NVBIOS_THERM_FAN_TRIP:
114                         duty = nvkm_therm_update_trip(therm);
115                         break;
116                 case NVBIOS_THERM_FAN_LINEAR:
117                         duty = nvkm_therm_update_linear(therm);
118                         break;
119                 case NVBIOS_THERM_FAN_OTHER:
120                         if (therm->cstate)
121                                 duty = therm->cstate;
122                         poll = false;
123                         break;
124                 }
125                 immd = false;
126                 break;
127         case NVKM_THERM_CTRL_NONE:
128         default:
129                 tmr->alarm_cancel(tmr, &therm->alarm);
130                 poll = false;
131         }
132
133         if (list_empty(&therm->alarm.head) && poll)
134                 tmr->alarm(tmr, 1000000000ULL, &therm->alarm);
135         spin_unlock_irqrestore(&therm->lock, flags);
136
137         if (duty >= 0) {
138                 nvkm_debug(subdev, "FAN target request: %d%%\n", duty);
139                 nvkm_therm_fan_set(therm, immd, duty);
140         }
141 }
142
143 int
144 nvkm_therm_cstate(struct nvkm_therm *therm, int fan, int dir)
145 {
146         struct nvkm_subdev *subdev = &therm->subdev;
147         if (!dir || (dir < 0 && fan < therm->cstate) ||
148                     (dir > 0 && fan > therm->cstate)) {
149                 nvkm_debug(subdev, "default fan speed -> %d%%\n", fan);
150                 therm->cstate = fan;
151                 nvkm_therm_update(therm, -1);
152         }
153         return 0;
154 }
155
156 static void
157 nvkm_therm_alarm(struct nvkm_alarm *alarm)
158 {
159         struct nvkm_therm *therm =
160                container_of(alarm, struct nvkm_therm, alarm);
161         nvkm_therm_update(therm, -1);
162 }
163
164 int
165 nvkm_therm_fan_mode(struct nvkm_therm *therm, int mode)
166 {
167         struct nvkm_subdev *subdev = &therm->subdev;
168         struct nvkm_device *device = subdev->device;
169         static const char *name[] = {
170                 "disabled",
171                 "manual",
172                 "automatic"
173         };
174
175         /* The default PPWR ucode on fermi interferes with fan management */
176         if ((mode >= ARRAY_SIZE(name)) ||
177             (mode != NVKM_THERM_CTRL_NONE && device->card_type >= NV_C0 &&
178              !device->pmu))
179                 return -EINVAL;
180
181         /* do not allow automatic fan management if the thermal sensor is
182          * not available */
183         if (mode == NVKM_THERM_CTRL_AUTO &&
184             therm->func->temp_get(therm) < 0)
185                 return -EINVAL;
186
187         if (therm->mode == mode)
188                 return 0;
189
190         nvkm_debug(subdev, "fan management: %s\n", name[mode]);
191         nvkm_therm_update(therm, mode);
192         return 0;
193 }
194
195 int
196 nvkm_therm_attr_get(struct nvkm_therm *therm, enum nvkm_therm_attr_type type)
197 {
198         switch (type) {
199         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
200                 return therm->fan->bios.min_duty;
201         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
202                 return therm->fan->bios.max_duty;
203         case NVKM_THERM_ATTR_FAN_MODE:
204                 return therm->mode;
205         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
206                 return therm->bios_sensor.thrs_fan_boost.temp;
207         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
208                 return therm->bios_sensor.thrs_fan_boost.hysteresis;
209         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
210                 return therm->bios_sensor.thrs_down_clock.temp;
211         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
212                 return therm->bios_sensor.thrs_down_clock.hysteresis;
213         case NVKM_THERM_ATTR_THRS_CRITICAL:
214                 return therm->bios_sensor.thrs_critical.temp;
215         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
216                 return therm->bios_sensor.thrs_critical.hysteresis;
217         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
218                 return therm->bios_sensor.thrs_shutdown.temp;
219         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
220                 return therm->bios_sensor.thrs_shutdown.hysteresis;
221         }
222
223         return -EINVAL;
224 }
225
226 int
227 nvkm_therm_attr_set(struct nvkm_therm *therm,
228                     enum nvkm_therm_attr_type type, int value)
229 {
230         switch (type) {
231         case NVKM_THERM_ATTR_FAN_MIN_DUTY:
232                 if (value < 0)
233                         value = 0;
234                 if (value > therm->fan->bios.max_duty)
235                         value = therm->fan->bios.max_duty;
236                 therm->fan->bios.min_duty = value;
237                 return 0;
238         case NVKM_THERM_ATTR_FAN_MAX_DUTY:
239                 if (value < 0)
240                         value = 0;
241                 if (value < therm->fan->bios.min_duty)
242                         value = therm->fan->bios.min_duty;
243                 therm->fan->bios.max_duty = value;
244                 return 0;
245         case NVKM_THERM_ATTR_FAN_MODE:
246                 return nvkm_therm_fan_mode(therm, value);
247         case NVKM_THERM_ATTR_THRS_FAN_BOOST:
248                 therm->bios_sensor.thrs_fan_boost.temp = value;
249                 therm->func->program_alarms(therm);
250                 return 0;
251         case NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST:
252                 therm->bios_sensor.thrs_fan_boost.hysteresis = value;
253                 therm->func->program_alarms(therm);
254                 return 0;
255         case NVKM_THERM_ATTR_THRS_DOWN_CLK:
256                 therm->bios_sensor.thrs_down_clock.temp = value;
257                 therm->func->program_alarms(therm);
258                 return 0;
259         case NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST:
260                 therm->bios_sensor.thrs_down_clock.hysteresis = value;
261                 therm->func->program_alarms(therm);
262                 return 0;
263         case NVKM_THERM_ATTR_THRS_CRITICAL:
264                 therm->bios_sensor.thrs_critical.temp = value;
265                 therm->func->program_alarms(therm);
266                 return 0;
267         case NVKM_THERM_ATTR_THRS_CRITICAL_HYST:
268                 therm->bios_sensor.thrs_critical.hysteresis = value;
269                 therm->func->program_alarms(therm);
270                 return 0;
271         case NVKM_THERM_ATTR_THRS_SHUTDOWN:
272                 therm->bios_sensor.thrs_shutdown.temp = value;
273                 therm->func->program_alarms(therm);
274                 return 0;
275         case NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST:
276                 therm->bios_sensor.thrs_shutdown.hysteresis = value;
277                 therm->func->program_alarms(therm);
278                 return 0;
279         }
280
281         return -EINVAL;
282 }
283
284 static void
285 nvkm_therm_intr(struct nvkm_subdev *subdev)
286 {
287         struct nvkm_therm *therm = nvkm_therm(subdev);
288         if (therm->func->intr)
289                 therm->func->intr(therm);
290 }
291
292 static int
293 nvkm_therm_fini(struct nvkm_subdev *subdev, bool suspend)
294 {
295         struct nvkm_therm *therm = nvkm_therm(subdev);
296
297         if (therm->func->fini)
298                 therm->func->fini(therm);
299
300         nvkm_therm_fan_fini(therm, suspend);
301         nvkm_therm_sensor_fini(therm, suspend);
302
303         if (suspend) {
304                 therm->suspend = therm->mode;
305                 therm->mode = NVKM_THERM_CTRL_NONE;
306         }
307
308         return 0;
309 }
310
311 static int
312 nvkm_therm_oneinit(struct nvkm_subdev *subdev)
313 {
314         struct nvkm_therm *therm = nvkm_therm(subdev);
315         nvkm_therm_sensor_ctor(therm);
316         nvkm_therm_ic_ctor(therm);
317         nvkm_therm_fan_ctor(therm);
318         nvkm_therm_fan_mode(therm, NVKM_THERM_CTRL_AUTO);
319         nvkm_therm_sensor_preinit(therm);
320         return 0;
321 }
322
323 static int
324 nvkm_therm_init(struct nvkm_subdev *subdev)
325 {
326         struct nvkm_therm *therm = nvkm_therm(subdev);
327
328         therm->func->init(therm);
329
330         if (therm->suspend >= 0) {
331                 /* restore the pwm value only when on manual or auto mode */
332                 if (therm->suspend > 0)
333                         nvkm_therm_fan_set(therm, true, therm->fan->percent);
334
335                 nvkm_therm_fan_mode(therm, therm->suspend);
336         }
337
338         nvkm_therm_sensor_init(therm);
339         nvkm_therm_fan_init(therm);
340         return 0;
341 }
342
343 static void *
344 nvkm_therm_dtor(struct nvkm_subdev *subdev)
345 {
346         struct nvkm_therm *therm = nvkm_therm(subdev);
347         kfree(therm->fan);
348         return therm;
349 }
350
351 static const struct nvkm_subdev_func
352 nvkm_therm = {
353         .dtor = nvkm_therm_dtor,
354         .oneinit = nvkm_therm_oneinit,
355         .init = nvkm_therm_init,
356         .fini = nvkm_therm_fini,
357         .intr = nvkm_therm_intr,
358 };
359
360 int
361 nvkm_therm_new_(const struct nvkm_therm_func *func, struct nvkm_device *device,
362                 int index, struct nvkm_therm **ptherm)
363 {
364         struct nvkm_therm *therm;
365
366         if (!(therm = *ptherm = kzalloc(sizeof(*therm), GFP_KERNEL)))
367                 return -ENOMEM;
368
369         nvkm_subdev_ctor(&nvkm_therm, device, index, 0, &therm->subdev);
370         therm->func = func;
371
372         nvkm_alarm_init(&therm->alarm, nvkm_therm_alarm);
373         spin_lock_init(&therm->lock);
374         spin_lock_init(&therm->sensor.alarm_program_lock);
375
376         therm->fan_get = nvkm_therm_fan_user_get;
377         therm->fan_set = nvkm_therm_fan_user_set;
378         therm->attr_get = nvkm_therm_attr_get;
379         therm->attr_set = nvkm_therm_attr_set;
380         therm->mode = therm->suspend = -1; /* undefined */
381         return 0;
382 }