1 /*-
2 * Copyright (c) 2000, 2001 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/5.4/sys/dev/acpica/acpi_thermal.c 142509 2005-02-25 21:43:38Z njl $");
30
31 #include "opt_acpi.h"
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/kthread.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/bus.h>
39 #include <sys/proc.h>
40 #include <sys/reboot.h>
41 #include <sys/sysctl.h>
42 #include <sys/unistd.h>
43 #include <sys/power.h>
44
45 #include "acpi.h"
46 #include <dev/acpica/acpivar.h>
47
48 /* Hooks for the ACPI CA debugging infrastructure */
49 #define _COMPONENT ACPI_THERMAL
50 ACPI_MODULE_NAME("THERMAL")
51
52 #define TZ_ZEROC 2732
53 #define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), (((x) - TZ_ZEROC) % 10)
54
55 #define TZ_NOTIFY_TEMPERATURE 0x80 /* Temperature changed. */
56 #define TZ_NOTIFY_LEVELS 0x81 /* Cooling levels changed. */
57 #define TZ_NOTIFY_DEVICES 0x82 /* Device lists changed. */
58 #define TZ_NOTIFY_CRITICAL 0xcc /* Fake notify that _CRT/_HOT reached. */
59
60 /* Check for temperature changes every 10 seconds by default */
61 #define TZ_POLLRATE 10
62
63 /* Make sure the reported temperature is valid for this number of polls. */
64 #define TZ_VALIDCHECKS 3
65
66 /* Notify the user we will be shutting down in one more poll cycle. */
67 #define TZ_NOTIFYCOUNT (TZ_VALIDCHECKS - 1)
68
69 /* ACPI spec defines this */
70 #define TZ_NUMLEVELS 10
71 struct acpi_tz_zone {
72 int ac[TZ_NUMLEVELS];
73 ACPI_BUFFER al[TZ_NUMLEVELS];
74 int crt;
75 int hot;
76 ACPI_BUFFER psl;
77 int psv;
78 int tc1;
79 int tc2;
80 int tsp;
81 int tzp;
82 };
83
84 struct acpi_tz_softc {
85 device_t tz_dev;
86 ACPI_HANDLE tz_handle; /*Thermal zone handle*/
87 int tz_temperature; /*Current temperature*/
88 int tz_active; /*Current active cooling*/
89 #define TZ_ACTIVE_NONE -1
90 int tz_requested; /*Minimum active cooling*/
91 int tz_thflags; /*Current temp-related flags*/
92 #define TZ_THFLAG_NONE 0
93 #define TZ_THFLAG_PSV (1<<0)
94 #define TZ_THFLAG_HOT (1<<2)
95 #define TZ_THFLAG_CRT (1<<3)
96 int tz_flags;
97 #define TZ_FLAG_NO_SCP (1<<0) /*No _SCP method*/
98 #define TZ_FLAG_GETPROFILE (1<<1) /*Get power_profile in timeout*/
99 #define TZ_FLAG_GETSETTINGS (1<<2) /*Get devs/setpoints*/
100 struct timespec tz_cooling_started;
101 /*Current cooling starting time*/
102
103 struct sysctl_ctx_list tz_sysctl_ctx;
104 struct sysctl_oid *tz_sysctl_tree;
105 eventhandler_tag tz_event;
106
107 struct acpi_tz_zone tz_zone; /*Thermal zone parameters*/
108 int tz_validchecks;
109 };
110
111 static int acpi_tz_probe(device_t dev);
112 static int acpi_tz_attach(device_t dev);
113 static int acpi_tz_establish(struct acpi_tz_softc *sc);
114 static void acpi_tz_monitor(void *Context);
115 static void acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg);
116 static void acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg);
117 static void acpi_tz_getparam(struct acpi_tz_softc *sc, char *node,
118 int *data);
119 static void acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what);
120 static int acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS);
121 static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify,
122 void *context);
123 static void acpi_tz_signal(struct acpi_tz_softc *sc, int flags);
124 static void acpi_tz_timeout(struct acpi_tz_softc *sc, int flags);
125 static void acpi_tz_power_profile(void *arg);
126 static void acpi_tz_thread(void *arg);
127
128 static device_method_t acpi_tz_methods[] = {
129 /* Device interface */
130 DEVMETHOD(device_probe, acpi_tz_probe),
131 DEVMETHOD(device_attach, acpi_tz_attach),
132
133 {0, 0}
134 };
135
136 static driver_t acpi_tz_driver = {
137 "acpi_tz",
138 acpi_tz_methods,
139 sizeof(struct acpi_tz_softc),
140 };
141
142 static devclass_t acpi_tz_devclass;
143 DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, 0, 0);
144 MODULE_DEPEND(acpi_tz, acpi, 1, 1, 1);
145
146 static struct sysctl_ctx_list acpi_tz_sysctl_ctx;
147 static struct sysctl_oid *acpi_tz_sysctl_tree;
148
149 /* Minimum cooling run time */
150 static int acpi_tz_min_runtime = 0;
151 static int acpi_tz_polling_rate = TZ_POLLRATE;
152
153 /* Timezone polling thread */
154 static struct proc *acpi_tz_proc;
155 ACPI_LOCK_DECL(thermal, "ACPI thermal zone");
156
157 static int
158 acpi_tz_probe(device_t dev)
159 {
160 int result;
161
162 if (acpi_get_type(dev) == ACPI_TYPE_THERMAL && !acpi_disabled("thermal")) {
163 device_set_desc(dev, "Thermal Zone");
164 result = -10;
165 } else
166 result = ENXIO;
167 return (result);
168 }
169
170 static int
171 acpi_tz_attach(device_t dev)
172 {
173 struct acpi_tz_softc *sc;
174 struct acpi_softc *acpi_sc;
175 int error;
176 char oidname[8];
177
178 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
179
180 sc = device_get_softc(dev);
181 sc->tz_dev = dev;
182 sc->tz_handle = acpi_get_handle(dev);
183 sc->tz_requested = TZ_ACTIVE_NONE;
184 sc->tz_active = TZ_ACTIVE_NONE;
185 sc->tz_thflags = TZ_THFLAG_NONE;
186
187 /*
188 * Parse the current state of the thermal zone and build control
189 * structures. We don't need to worry about interference with the
190 * control thread since we haven't fully attached this device yet.
191 */
192 if ((error = acpi_tz_establish(sc)) != 0)
193 return (error);
194
195 /*
196 * Register for any Notify events sent to this zone.
197 */
198 AcpiInstallNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY,
199 acpi_tz_notify_handler, sc);
200
201 /*
202 * Create our sysctl nodes.
203 *
204 * XXX we need a mechanism for adding nodes under ACPI.
205 */
206 if (device_get_unit(dev) == 0) {
207 acpi_sc = acpi_device_get_parent_softc(dev);
208 sysctl_ctx_init(&acpi_tz_sysctl_ctx);
209 acpi_tz_sysctl_tree = SYSCTL_ADD_NODE(&acpi_tz_sysctl_ctx,
210 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
211 OID_AUTO, "thermal", CTLFLAG_RD, 0, "");
212 SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx,
213 SYSCTL_CHILDREN(acpi_tz_sysctl_tree),
214 OID_AUTO, "min_runtime", CTLFLAG_RD | CTLFLAG_RW,
215 &acpi_tz_min_runtime, 0,
216 "minimum cooling run time in sec");
217 SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx,
218 SYSCTL_CHILDREN(acpi_tz_sysctl_tree),
219 OID_AUTO, "polling_rate", CTLFLAG_RD | CTLFLAG_RW,
220 &acpi_tz_polling_rate, 0, "monitor polling rate");
221 }
222 sysctl_ctx_init(&sc->tz_sysctl_ctx);
223 sprintf(oidname, "tz%d", device_get_unit(dev));
224 sc->tz_sysctl_tree = SYSCTL_ADD_NODE(&sc->tz_sysctl_ctx,
225 SYSCTL_CHILDREN(acpi_tz_sysctl_tree),
226 OID_AUTO, oidname, CTLFLAG_RD, 0, "");
227 SYSCTL_ADD_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
228 OID_AUTO, "temperature", CTLFLAG_RD, &sc->tz_temperature,
229 sizeof(sc->tz_temperature), "IK",
230 "current thermal zone temperature");
231 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
232 OID_AUTO, "active", CTLTYPE_INT | CTLFLAG_RW,
233 sc, 0, acpi_tz_active_sysctl, "I", "");
234
235 SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
236 OID_AUTO, "thermal_flags", CTLFLAG_RD,
237 &sc->tz_thflags, 0, "thermal zone flags");
238 SYSCTL_ADD_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
239 OID_AUTO, "_PSV", CTLFLAG_RD, &sc->tz_zone.psv,
240 sizeof(sc->tz_zone.psv), "IK", "");
241 SYSCTL_ADD_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
242 OID_AUTO, "_HOT", CTLFLAG_RD, &sc->tz_zone.hot,
243 sizeof(sc->tz_zone.hot), "IK", "");
244 SYSCTL_ADD_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
245 OID_AUTO, "_CRT", CTLFLAG_RD, &sc->tz_zone.crt,
246 sizeof(sc->tz_zone.crt), "IK", "");
247 SYSCTL_ADD_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
248 OID_AUTO, "_ACx", CTLFLAG_RD, &sc->tz_zone.ac,
249 sizeof(sc->tz_zone.ac), "IK", "");
250
251 /*
252 * Create our thread; we only need one, it will service all of the
253 * thermal zones. Register our power profile event handler.
254 */
255 sc->tz_event = EVENTHANDLER_REGISTER(power_profile_change,
256 acpi_tz_power_profile, sc, 0);
257 if (acpi_tz_proc == NULL) {
258 error = kthread_create(acpi_tz_thread, NULL, &acpi_tz_proc,
259 RFHIGHPID, 0, "acpi_thermal");
260 if (error != 0) {
261 device_printf(sc->tz_dev, "could not create thread - %d", error);
262 goto out;
263 }
264 }
265
266 /*
267 * Flag the event handler for a manual invocation by our timeout.
268 * We defer it like this so that the rest of the subsystem has time
269 * to come up. Don't bother evaluating/printing the temperature at
270 * this point; on many systems it'll be bogus until the EC is running.
271 */
272 sc->tz_flags |= TZ_FLAG_GETPROFILE;
273
274 out:
275 if (error != 0) {
276 EVENTHANDLER_DEREGISTER(power_profile_change, sc->tz_event);
277 AcpiRemoveNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY,
278 acpi_tz_notify_handler);
279 sysctl_ctx_free(&sc->tz_sysctl_ctx);
280 }
281 return_VALUE (error);
282 }
283
284 /*
285 * Parse the current state of this thermal zone and set up to use it.
286 *
287 * Note that we may have previous state, which will have to be discarded.
288 */
289 static int
290 acpi_tz_establish(struct acpi_tz_softc *sc)
291 {
292 ACPI_OBJECT *obj;
293 int i;
294 char nbuf[8];
295
296 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
297
298 /* Erase any existing state. */
299 for (i = 0; i < TZ_NUMLEVELS; i++)
300 if (sc->tz_zone.al[i].Pointer != NULL)
301 AcpiOsFree(sc->tz_zone.al[i].Pointer);
302 if (sc->tz_zone.psl.Pointer != NULL)
303 AcpiOsFree(sc->tz_zone.psl.Pointer);
304 bzero(&sc->tz_zone, sizeof(sc->tz_zone));
305
306 /* Evaluate thermal zone parameters. */
307 for (i = 0; i < TZ_NUMLEVELS; i++) {
308 sprintf(nbuf, "_AC%d", i);
309 acpi_tz_getparam(sc, nbuf, &sc->tz_zone.ac[i]);
310 sprintf(nbuf, "_AL%d", i);
311 sc->tz_zone.al[i].Length = ACPI_ALLOCATE_BUFFER;
312 sc->tz_zone.al[i].Pointer = NULL;
313 AcpiEvaluateObject(sc->tz_handle, nbuf, NULL, &sc->tz_zone.al[i]);
314 obj = (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer;
315 if (obj != NULL) {
316 /* Should be a package containing a list of power objects */
317 if (obj->Type != ACPI_TYPE_PACKAGE) {
318 device_printf(sc->tz_dev, "%s has unknown type %d, rejecting\n",
319 nbuf, obj->Type);
320 return_VALUE (ENXIO);
321 }
322 }
323 }
324 acpi_tz_getparam(sc, "_CRT", &sc->tz_zone.crt);
325 acpi_tz_getparam(sc, "_HOT", &sc->tz_zone.hot);
326 sc->tz_zone.psl.Length = ACPI_ALLOCATE_BUFFER;
327 sc->tz_zone.psl.Pointer = NULL;
328 AcpiEvaluateObject(sc->tz_handle, "_PSL", NULL, &sc->tz_zone.psl);
329 acpi_tz_getparam(sc, "_PSV", &sc->tz_zone.psv);
330 acpi_tz_getparam(sc, "_TC1", &sc->tz_zone.tc1);
331 acpi_tz_getparam(sc, "_TC2", &sc->tz_zone.tc2);
332 acpi_tz_getparam(sc, "_TSP", &sc->tz_zone.tsp);
333 acpi_tz_getparam(sc, "_TZP", &sc->tz_zone.tzp);
334
335 /*
336 * Sanity-check the values we've been given.
337 *
338 * XXX what do we do about systems that give us the same value for
339 * more than one of these setpoints?
340 */
341 acpi_tz_sanity(sc, &sc->tz_zone.crt, "_CRT");
342 acpi_tz_sanity(sc, &sc->tz_zone.hot, "_HOT");
343 acpi_tz_sanity(sc, &sc->tz_zone.psv, "_PSV");
344 for (i = 0; i < TZ_NUMLEVELS; i++)
345 acpi_tz_sanity(sc, &sc->tz_zone.ac[i], "_ACx");
346
347 return_VALUE (0);
348 }
349
350 static char *aclevel_string[] = {
351 "NONE", "_AC0", "_AC1", "_AC2", "_AC3", "_AC4",
352 "_AC5", "_AC6", "_AC7", "_AC8", "_AC9"
353 };
354
355 static __inline const char *
356 acpi_tz_aclevel_string(int active)
357 {
358 if (active < -1 || active >= TZ_NUMLEVELS)
359 return (aclevel_string[0]);
360
361 return (aclevel_string[active + 1]);
362 }
363
364 /*
365 * Evaluate the condition of a thermal zone, take appropriate actions.
366 */
367 static void
368 acpi_tz_monitor(void *Context)
369 {
370 struct acpi_tz_softc *sc;
371 struct timespec curtime;
372 int temp;
373 int i;
374 int newactive, newflags;
375 ACPI_STATUS status;
376
377 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
378
379 sc = (struct acpi_tz_softc *)Context;
380
381 /* Get the current temperature. */
382 status = acpi_GetInteger(sc->tz_handle, "_TMP", &temp);
383 if (ACPI_FAILURE(status)) {
384 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
385 "error fetching current temperature -- %s\n",
386 AcpiFormatException(status));
387 /* XXX disable zone? go to max cooling? */
388 return_VOID;
389 }
390
391 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "got %d.%dC\n", TZ_KELVTOC(temp)));
392 sc->tz_temperature = temp;
393
394 /*
395 * Work out what we ought to be doing right now.
396 *
397 * Note that the _ACx levels sort from hot to cold.
398 */
399 newactive = TZ_ACTIVE_NONE;
400 for (i = TZ_NUMLEVELS - 1; i >= 0; i--) {
401 if (sc->tz_zone.ac[i] != -1 && temp >= sc->tz_zone.ac[i]) {
402 newactive = i;
403 if (sc->tz_active != newactive) {
404 ACPI_VPRINT(sc->tz_dev,
405 acpi_device_get_parent_softc(sc->tz_dev),
406 "_AC%d: temperature %d.%d >= setpoint %d.%d\n", i,
407 TZ_KELVTOC(temp), TZ_KELVTOC(sc->tz_zone.ac[i]));
408 }
409 }
410 }
411
412 /*
413 * We are going to get _ACx level down (colder side), but give a guaranteed
414 * minimum cooling run time if requested.
415 */
416 if (acpi_tz_min_runtime > 0 && sc->tz_active != TZ_ACTIVE_NONE &&
417 (newactive == TZ_ACTIVE_NONE || newactive > sc->tz_active)) {
418
419 getnanotime(&curtime);
420 timespecsub(&curtime, &sc->tz_cooling_started);
421 if (curtime.tv_sec < acpi_tz_min_runtime)
422 newactive = sc->tz_active;
423 }
424
425 /* Handle user override of active mode */
426 if (sc->tz_requested != TZ_ACTIVE_NONE && sc->tz_requested < newactive)
427 newactive = sc->tz_requested;
428
429 /* update temperature-related flags */
430 newflags = TZ_THFLAG_NONE;
431 if (sc->tz_zone.psv != -1 && temp >= sc->tz_zone.psv)
432 newflags |= TZ_THFLAG_PSV;
433 if (sc->tz_zone.hot != -1 && temp >= sc->tz_zone.hot)
434 newflags |= TZ_THFLAG_HOT;
435 if (sc->tz_zone.crt != -1 && temp >= sc->tz_zone.crt)
436 newflags |= TZ_THFLAG_CRT;
437
438 /* If the active cooling state has changed, we have to switch things. */
439 if (newactive != sc->tz_active) {
440 /* Turn off the cooling devices that are on, if any are */
441 if (sc->tz_active != TZ_ACTIVE_NONE)
442 acpi_ForeachPackageObject(
443 (ACPI_OBJECT *)sc->tz_zone.al[sc->tz_active].Pointer,
444 acpi_tz_switch_cooler_off, sc);
445
446 /* Turn on cooling devices that are required, if any are */
447 if (newactive != TZ_ACTIVE_NONE) {
448 acpi_ForeachPackageObject(
449 (ACPI_OBJECT *)sc->tz_zone.al[newactive].Pointer,
450 acpi_tz_switch_cooler_on, sc);
451 }
452 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
453 "switched from %s to %s: %d.%dC\n",
454 acpi_tz_aclevel_string(sc->tz_active),
455 acpi_tz_aclevel_string(newactive), TZ_KELVTOC(temp));
456 sc->tz_active = newactive;
457 getnanotime(&sc->tz_cooling_started);
458 }
459
460 /* XXX (de)activate any passive cooling that may be required. */
461
462 /*
463 * If the temperature is at _HOT or _CRT, increment our event count.
464 * If it has occurred enough times, shutdown the system. This is
465 * needed because some systems will report an invalid high temperature
466 * for one poll cycle. It is suspected this is due to the embedded
467 * controller timing out. A typical value is 138C for one cycle on
468 * a system that is otherwise 65C.
469 *
470 * If we're almost at that threshold, notify the user through devd(8).
471 */
472 if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) {
473 sc->tz_validchecks++;
474 if (sc->tz_validchecks == TZ_VALIDCHECKS) {
475 device_printf(sc->tz_dev,
476 "WARNING - current temperature (%d.%dC) exceeds safe limits\n",
477 TZ_KELVTOC(sc->tz_temperature));
478 shutdown_nice(RB_POWEROFF);
479 } else if (sc->tz_validchecks == TZ_NOTIFYCOUNT)
480 acpi_UserNotify("Thermal", sc->tz_handle, TZ_NOTIFY_CRITICAL);
481 } else {
482 sc->tz_validchecks = 0;
483 }
484 sc->tz_thflags = newflags;
485
486 return_VOID;
487 }
488
489 /*
490 * Given an object, verify that it's a reference to a device of some sort,
491 * and try to switch it off.
492 */
493 static void
494 acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg)
495 {
496 ACPI_HANDLE cooler;
497
498 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
499
500 cooler = acpi_GetReference(NULL, obj);
501 if (cooler == NULL) {
502 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n"));
503 return_VOID;
504 }
505
506 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s off\n",
507 acpi_name(cooler)));
508 acpi_pwr_switch_consumer(cooler, ACPI_STATE_D3);
509
510 return_VOID;
511 }
512
513 /*
514 * Given an object, verify that it's a reference to a device of some sort,
515 * and try to switch it on.
516 *
517 * XXX replication of off/on function code is bad.
518 */
519 static void
520 acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg)
521 {
522 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
523 ACPI_HANDLE cooler;
524 ACPI_STATUS status;
525
526 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
527
528 cooler = acpi_GetReference(NULL, obj);
529 if (cooler == NULL) {
530 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n"));
531 return_VOID;
532 }
533
534 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s on\n",
535 acpi_name(cooler)));
536 status = acpi_pwr_switch_consumer(cooler, ACPI_STATE_D0);
537 if (ACPI_FAILURE(status)) {
538 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
539 "failed to activate %s - %s\n", acpi_name(cooler),
540 AcpiFormatException(status));
541 }
542
543 return_VOID;
544 }
545
546 /*
547 * Read/debug-print a parameter, default it to -1.
548 */
549 static void
550 acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, int *data)
551 {
552
553 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
554
555 if (ACPI_FAILURE(acpi_GetInteger(sc->tz_handle, node, data))) {
556 *data = -1;
557 } else {
558 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "%s.%s = %d\n",
559 acpi_name(sc->tz_handle), node, *data));
560 }
561
562 return_VOID;
563 }
564
565 /*
566 * Sanity-check a temperature value. Assume that setpoints
567 * should be between 0C and 150C.
568 */
569 static void
570 acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what)
571 {
572 if (*val != -1 && (*val < TZ_ZEROC || *val > TZ_ZEROC + 1500)) {
573 device_printf(sc->tz_dev, "%s value is absurd, ignored (%d.%dC)\n",
574 what, TZ_KELVTOC(*val));
575 *val = -1;
576 }
577 }
578
579 /*
580 * Respond to a sysctl on the active state node.
581 */
582 static int
583 acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS)
584 {
585 struct acpi_tz_softc *sc;
586 int active;
587 int error;
588
589 sc = (struct acpi_tz_softc *)oidp->oid_arg1;
590 active = sc->tz_active;
591 error = sysctl_handle_int(oidp, &active, 0, req);
592
593 /* Error or no new value */
594 if (error != 0 || req->newptr == NULL)
595 return (error);
596 if (active < -1 || active >= TZ_NUMLEVELS)
597 return (EINVAL);
598
599 /* Set new preferred level and re-switch */
600 sc->tz_requested = active;
601 acpi_tz_signal(sc, 0);
602 return (0);
603 }
604
605 static void
606 acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
607 {
608 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)context;
609
610 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
611
612 switch (notify) {
613 case TZ_NOTIFY_TEMPERATURE:
614 /* Temperature change occurred */
615 acpi_tz_signal(sc, 0);
616 break;
617 case TZ_NOTIFY_DEVICES:
618 case TZ_NOTIFY_LEVELS:
619 /* Zone devices/setpoints changed */
620 acpi_tz_signal(sc, TZ_FLAG_GETSETTINGS);
621 break;
622 default:
623 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
624 "unknown Notify event 0x%x\n", notify);
625 break;
626 }
627
628 acpi_UserNotify("Thermal", h, notify);
629
630 return_VOID;
631 }
632
633 static void
634 acpi_tz_signal(struct acpi_tz_softc *sc, int flags)
635 {
636 ACPI_LOCK(thermal);
637 sc->tz_flags |= flags;
638 ACPI_UNLOCK(thermal);
639 wakeup(&acpi_tz_proc);
640 }
641
642 /*
643 * Notifies can be generated asynchronously but have also been seen to be
644 * triggered by other thermal methods. One system generates a notify of
645 * 0x81 when the fan is turned on or off. Another generates it when _SCP
646 * is called. To handle these situations, we check the zone via
647 * acpi_tz_monitor() before evaluating changes to setpoints or the cooling
648 * policy.
649 */
650 static void
651 acpi_tz_timeout(struct acpi_tz_softc *sc, int flags)
652 {
653
654 /* Check the current temperature and take action based on it */
655 acpi_tz_monitor(sc);
656
657 /* If requested, get the power profile settings. */
658 if (flags & TZ_FLAG_GETPROFILE)
659 acpi_tz_power_profile(sc);
660
661 /*
662 * If requested, check for new devices/setpoints. After finding them,
663 * check if we need to switch fans based on the new values.
664 */
665 if (flags & TZ_FLAG_GETSETTINGS) {
666 acpi_tz_establish(sc);
667 acpi_tz_monitor(sc);
668 }
669
670 /* XXX passive cooling actions? */
671 }
672
673 /*
674 * System power profile may have changed; fetch and notify the
675 * thermal zone accordingly.
676 *
677 * Since this can be called from an arbitrary eventhandler, it needs
678 * to get the ACPI lock itself.
679 */
680 static void
681 acpi_tz_power_profile(void *arg)
682 {
683 ACPI_STATUS status;
684 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
685 int state;
686
687 state = power_profile_get_state();
688 if (state != POWER_PROFILE_PERFORMANCE && state != POWER_PROFILE_ECONOMY)
689 return;
690
691 /* check that we haven't decided there's no _SCP method */
692 if ((sc->tz_flags & TZ_FLAG_NO_SCP) == 0) {
693
694 /* Call _SCP to set the new profile */
695 status = acpi_SetInteger(sc->tz_handle, "_SCP",
696 (state == POWER_PROFILE_PERFORMANCE) ? 0 : 1);
697 if (ACPI_FAILURE(status)) {
698 if (status != AE_NOT_FOUND)
699 ACPI_VPRINT(sc->tz_dev,
700 acpi_device_get_parent_softc(sc->tz_dev),
701 "can't evaluate %s._SCP - %s\n",
702 acpi_name(sc->tz_handle),
703 AcpiFormatException(status));
704 sc->tz_flags |= TZ_FLAG_NO_SCP;
705 } else {
706 /* We have to re-evaluate the entire zone now */
707 acpi_tz_signal(sc, TZ_FLAG_GETSETTINGS);
708 }
709 }
710 }
711
712 /*
713 * Thermal zone monitor thread.
714 */
715 static void
716 acpi_tz_thread(void *arg)
717 {
718 device_t *devs;
719 int devcount, i;
720 int flags;
721 struct acpi_tz_softc **sc;
722
723 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
724
725 devs = NULL;
726 devcount = 0;
727 sc = NULL;
728
729 for (;;) {
730 /* If the number of devices has changed, re-evaluate. */
731 if (devclass_get_maxunit(acpi_tz_devclass) != devcount) {
732 if (devs != NULL) {
733 free(devs, M_TEMP);
734 free(sc, M_TEMP);
735 }
736 devclass_get_devices(acpi_tz_devclass, &devs, &devcount);
737 sc = malloc(sizeof(struct acpi_tz_softc *) * devcount, M_TEMP,
738 M_WAITOK | M_ZERO);
739 for (i = 0; i < devcount; i++)
740 sc[i] = device_get_softc(devs[i]);
741 }
742
743 /* Check for temperature events and act on them. */
744 for (i = 0; i < devcount; i++) {
745 ACPI_LOCK(thermal);
746 flags = sc[i]->tz_flags;
747 sc[i]->tz_flags &= TZ_FLAG_NO_SCP;
748 ACPI_UNLOCK(thermal);
749 acpi_tz_timeout(sc[i], flags);
750 }
751
752 /* If more work to do, don't go to sleep yet. */
753 ACPI_LOCK(thermal);
754 for (i = 0; i < devcount; i++) {
755 if (sc[i]->tz_flags & ~TZ_FLAG_NO_SCP)
756 break;
757 }
758
759 /*
760 * If we have no more work, sleep for a while, setting PDROP so that
761 * the mutex will not be reacquired. Otherwise, drop the mutex and
762 * loop to handle more events.
763 */
764 if (i == devcount)
765 msleep(&acpi_tz_proc, &thermal_mutex, PZERO | PDROP, "tzpoll",
766 hz * acpi_tz_polling_rate);
767 else
768 ACPI_UNLOCK(thermal);
769 }
770 }
Cache object: 782eb26933e9f01373b71bf2956c49c8
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