2 * Copyright (c) 2001 Michael Smith
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/malloc.h>
36 #include <contrib/dev/acpica/include/acpi.h>
37 #include <contrib/dev/acpica/include/accommon.h>
39 #include <dev/acpica/acpivar.h>
42 * ACPI power resource management.
44 * Power resource behaviour is slightly complicated by the fact that
45 * a single power resource may provide power for more than one device.
46 * Thus, we must track the device(s) being powered by a given power
47 * resource, and only deactivate it when there are no powered devices.
49 * Note that this only manages resources for known devices. There is an
50 * ugly case where we may turn of power to a device which is in use because
51 * we don't know that it depends on a given resource. We should perhaps
52 * try to be smarter about this, but a more complete solution would involve
53 * scanning all of the ACPI namespace to find devices we're not currently
54 * aware of, and this raises questions about whether they should be left
55 * on, turned off, etc.
58 MALLOC_DEFINE(M_ACPIPWR, "acpipwr", "ACPI power resources");
60 /* Hooks for the ACPI CA debugging infrastructure */
61 #define _COMPONENT ACPI_POWERRES
62 ACPI_MODULE_NAME("POWERRES")
64 /* Return values from _STA on a power resource */
65 #define ACPI_PWR_OFF 0
67 #define ACPI_PWR_UNK (-1)
69 /* A relationship between a power resource and a consumer. */
70 struct acpi_powerreference {
71 struct acpi_powerconsumer *ar_consumer;
72 struct acpi_powerresource *ar_resource;
73 TAILQ_ENTRY(acpi_powerreference) ar_rlink; /* link on resource list */
74 TAILQ_ENTRY(acpi_powerreference) ar_clink; /* link on consumer */
77 /* A power-managed device. */
78 struct acpi_powerconsumer {
79 /* Device which is powered */
80 ACPI_HANDLE ac_consumer;
82 TAILQ_ENTRY(acpi_powerconsumer) ac_link;
83 TAILQ_HEAD(,acpi_powerreference) ac_references;
86 /* A power resource. */
87 struct acpi_powerresource {
88 TAILQ_ENTRY(acpi_powerresource) ap_link;
89 TAILQ_HEAD(,acpi_powerreference) ap_references;
90 ACPI_HANDLE ap_resource;
91 UINT64 ap_systemlevel;
96 static TAILQ_HEAD(acpi_powerresource_list, acpi_powerresource)
98 static TAILQ_HEAD(acpi_powerconsumer_list, acpi_powerconsumer)
100 ACPI_SERIAL_DECL(powerres, "ACPI power resources");
102 static ACPI_STATUS acpi_pwr_register_consumer(ACPI_HANDLE consumer);
104 static ACPI_STATUS acpi_pwr_deregister_consumer(ACPI_HANDLE consumer);
106 static ACPI_STATUS acpi_pwr_register_resource(ACPI_HANDLE res);
108 static ACPI_STATUS acpi_pwr_deregister_resource(ACPI_HANDLE res);
110 static void acpi_pwr_reference_resource(ACPI_OBJECT *obj,
112 static int acpi_pwr_dereference_resource(struct acpi_powerconsumer
114 static ACPI_STATUS acpi_pwr_switch_power(void);
115 static struct acpi_powerresource
116 *acpi_pwr_find_resource(ACPI_HANDLE res);
117 static struct acpi_powerconsumer
118 *acpi_pwr_find_consumer(ACPI_HANDLE consumer);
120 /* Initialise our lists. */
122 acpi_pwr_init(void *junk)
124 TAILQ_INIT(&acpi_powerresources);
125 TAILQ_INIT(&acpi_powerconsumers);
127 SYSINIT(acpi_powerresource, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_pwr_init, NULL);
130 * Register a power resource.
132 * It's OK to call this if we already know about the resource.
135 acpi_pwr_register_resource(ACPI_HANDLE res)
140 struct acpi_powerresource *rp, *srp;
142 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
143 ACPI_SERIAL_ASSERT(powerres);
148 /* Look to see if we know about this resource */
149 if (acpi_pwr_find_resource(res) != NULL)
150 return_ACPI_STATUS (AE_OK); /* already know about it */
152 /* Allocate a new resource */
153 if ((rp = malloc(sizeof(*rp), M_ACPIPWR, M_NOWAIT | M_ZERO)) == NULL) {
154 status = AE_NO_MEMORY;
157 TAILQ_INIT(&rp->ap_references);
158 rp->ap_resource = res;
160 /* Get the Power Resource object */
161 buf.Length = ACPI_ALLOCATE_BUFFER;
162 if (ACPI_FAILURE(status = AcpiEvaluateObject(res, NULL, NULL, &buf))) {
163 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "no power resource object\n"));
167 if (obj->Type != ACPI_TYPE_POWER) {
168 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
169 "questionable power resource object %s\n",
174 rp->ap_systemlevel = obj->PowerResource.SystemLevel;
175 rp->ap_order = obj->PowerResource.ResourceOrder;
176 rp->ap_state = ACPI_PWR_UNK;
178 /* Sort the resource into the list */
180 srp = TAILQ_FIRST(&acpi_powerresources);
181 if (srp == NULL || rp->ap_order < srp->ap_order) {
182 TAILQ_INSERT_HEAD(&acpi_powerresources, rp, ap_link);
185 TAILQ_FOREACH(srp, &acpi_powerresources, ap_link) {
186 if (rp->ap_order < srp->ap_order) {
187 TAILQ_INSERT_BEFORE(srp, rp, ap_link);
191 TAILQ_INSERT_TAIL(&acpi_powerresources, rp, ap_link);
194 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
195 "registered power resource %s\n", acpi_name(res)));
198 if (buf.Pointer != NULL)
199 AcpiOsFree(buf.Pointer);
200 if (ACPI_FAILURE(status) && rp != NULL)
202 return_ACPI_STATUS (status);
207 * Deregister a power resource.
210 acpi_pwr_deregister_resource(ACPI_HANDLE res)
212 struct acpi_powerresource *rp;
214 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
215 ACPI_SERIAL_ASSERT(powerres);
219 /* Find the resource */
220 if ((rp = acpi_pwr_find_resource(res)) == NULL)
221 return_ACPI_STATUS (AE_BAD_PARAMETER);
223 /* Check that there are no consumers referencing this resource */
224 if (TAILQ_FIRST(&rp->ap_references) != NULL)
225 return_ACPI_STATUS (AE_BAD_PARAMETER);
227 /* Pull it off the list and free it */
228 TAILQ_REMOVE(&acpi_powerresources, rp, ap_link);
231 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "deregistered power resource %s\n",
234 return_ACPI_STATUS (AE_OK);
239 * Register a power consumer.
241 * It's OK to call this if we already know about the consumer.
244 acpi_pwr_register_consumer(ACPI_HANDLE consumer)
246 struct acpi_powerconsumer *pc;
248 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
249 ACPI_SERIAL_ASSERT(powerres);
251 /* Check to see whether we know about this consumer already */
252 if (acpi_pwr_find_consumer(consumer) != NULL)
253 return_ACPI_STATUS (AE_OK);
255 /* Allocate a new power consumer */
256 if ((pc = malloc(sizeof(*pc), M_ACPIPWR, M_NOWAIT)) == NULL)
257 return_ACPI_STATUS (AE_NO_MEMORY);
258 TAILQ_INSERT_HEAD(&acpi_powerconsumers, pc, ac_link);
259 TAILQ_INIT(&pc->ac_references);
260 pc->ac_consumer = consumer;
262 /* XXX we should try to find its current state */
263 pc->ac_state = ACPI_STATE_UNKNOWN;
265 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "registered power consumer %s\n",
266 acpi_name(consumer)));
268 return_ACPI_STATUS (AE_OK);
273 * Deregister a power consumer.
275 * This should only be done once the consumer has been powered off.
276 * (XXX is this correct? Check once implemented)
279 acpi_pwr_deregister_consumer(ACPI_HANDLE consumer)
281 struct acpi_powerconsumer *pc;
283 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
284 ACPI_SERIAL_ASSERT(powerres);
286 /* Find the consumer */
287 if ((pc = acpi_pwr_find_consumer(consumer)) == NULL)
288 return_ACPI_STATUS (AE_BAD_PARAMETER);
290 /* Make sure the consumer's not referencing anything right now */
291 if (TAILQ_FIRST(&pc->ac_references) != NULL)
292 return_ACPI_STATUS (AE_BAD_PARAMETER);
294 /* Pull the consumer off the list and free it */
295 TAILQ_REMOVE(&acpi_powerconsumers, pc, ac_link);
298 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "deregistered power consumer %s\n",
299 acpi_name(consumer)));
301 return_ACPI_STATUS (AE_OK);
306 * Set a power consumer to a particular power state.
309 acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state)
311 struct acpi_powerconsumer *pc;
312 ACPI_HANDLE method_handle, reslist_handle, pr0_handle;
313 ACPI_BUFFER reslist_buffer;
314 ACPI_OBJECT *reslist_object;
316 char *method_name, *reslist_name;
319 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
321 /* It's never ok to switch a non-existent consumer. */
322 if (consumer == NULL)
323 return_ACPI_STATUS (AE_NOT_FOUND);
324 reslist_buffer.Pointer = NULL;
325 reslist_object = NULL;
326 ACPI_SERIAL_BEGIN(powerres);
328 /* Find the consumer */
329 if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) {
330 if (ACPI_FAILURE(status = acpi_pwr_register_consumer(consumer)))
332 if ((pc = acpi_pwr_find_consumer(consumer)) == NULL)
333 panic("acpi added power consumer but can't find it");
336 /* Check for valid transitions. We can only go to D0 from D3. */
337 status = AE_BAD_PARAMETER;
338 if (pc->ac_state == ACPI_STATE_D3 && state != ACPI_STATE_D0)
341 /* Find transition mechanism(s) */
344 method_name = "_PS0";
345 reslist_name = "_PR0";
348 method_name = "_PS1";
349 reslist_name = "_PR1";
352 method_name = "_PS2";
353 reslist_name = "_PR2";
356 method_name = "_PS3";
357 reslist_name = "_PR3";
362 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "setup to switch %s D%d -> D%d\n",
363 acpi_name(consumer), pc->ac_state, state));
366 * Verify that this state is supported, ie. one of method or
367 * reslist must be present. We need to do this before we go
368 * dereferencing resources (since we might be trying to go to
369 * a state we don't support).
371 * Note that if any states are supported, the device has to
372 * support D0 and D3. It's never an error to try to go to
375 if (ACPI_FAILURE(AcpiGetHandle(consumer, method_name, &method_handle)))
376 method_handle = NULL;
377 if (ACPI_FAILURE(AcpiGetHandle(consumer, reslist_name, &reslist_handle)))
378 reslist_handle = NULL;
379 if (reslist_handle == NULL && method_handle == NULL) {
380 if (state == ACPI_STATE_D0) {
381 pc->ac_state = ACPI_STATE_D0;
385 if (state != ACPI_STATE_D3) {
386 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
387 "attempt to set unsupported state D%d\n", state));
392 * Turn off the resources listed in _PR0 to go to D3. If there is
393 * no _PR0 method, this object doesn't support ACPI power states.
395 if (ACPI_FAILURE(AcpiGetHandle(consumer, "_PR0", &pr0_handle))) {
396 status = AE_NOT_FOUND;
397 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
398 "device missing _PR0 (desired state was D%d)\n", state));
401 reslist_buffer.Length = ACPI_ALLOCATE_BUFFER;
402 status = AcpiEvaluateObject(pr0_handle, NULL, NULL, &reslist_buffer);
403 if (ACPI_FAILURE(status)) {
404 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
405 "can't evaluate _PR0 for device %s, state D%d\n",
406 acpi_name(consumer), state));
409 reslist_object = (ACPI_OBJECT *)reslist_buffer.Pointer;
410 if (!ACPI_PKG_VALID(reslist_object, 1)) {
411 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
412 "invalid package object for state D%d\n", state));
416 AcpiOsFree(reslist_buffer.Pointer);
417 reslist_buffer.Pointer = NULL;
418 reslist_object = NULL;
422 * Check that we can actually fetch the list of power resources
424 if (reslist_handle != NULL) {
425 reslist_buffer.Length = ACPI_ALLOCATE_BUFFER;
426 status = AcpiEvaluateObject(reslist_handle, NULL, NULL,
428 if (ACPI_FAILURE(status)) {
429 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
430 "can't evaluate resource list %s\n",
431 acpi_name(reslist_handle)));
434 reslist_object = (ACPI_OBJECT *)reslist_buffer.Pointer;
435 if (reslist_object->Type != ACPI_TYPE_PACKAGE) {
436 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
437 "resource list is not ACPI_TYPE_PACKAGE (%d)\n",
438 reslist_object->Type));
445 * Now we are ready to switch, so kill off any current power
446 * resource references.
448 res_changed = acpi_pwr_dereference_resource(pc);
451 * Add new power resource references, if we have any. Traverse the
452 * package that we got from evaluating reslist_handle, and look up each
453 * of the resources that are referenced.
455 if (reslist_object != NULL) {
456 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "referencing %d new resources\n",
457 reslist_object->Package.Count));
458 acpi_ForeachPackageObject(reslist_object, acpi_pwr_reference_resource,
464 * If we changed anything in the resource list, we need to run a switch
467 if (ACPI_FAILURE(status = acpi_pwr_switch_power())) {
468 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
469 "failed to switch resources from %s to D%d\n",
470 acpi_name(consumer), state));
472 /* XXX is this appropriate? Should we return to previous state? */
476 /* Invoke power state switch method (if present) */
477 if (method_handle != NULL) {
478 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
479 "invoking state transition method %s\n",
480 acpi_name(method_handle)));
481 status = AcpiEvaluateObject(method_handle, NULL, NULL, NULL);
482 if (ACPI_FAILURE(status)) {
483 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "failed to set state - %s\n",
484 AcpiFormatException(status)));
485 pc->ac_state = ACPI_STATE_UNKNOWN;
487 /* XXX Should we return to previous state? */
492 /* Transition was successful */
493 pc->ac_state = state;
497 ACPI_SERIAL_END(powerres);
498 if (reslist_buffer.Pointer != NULL)
499 AcpiOsFree(reslist_buffer.Pointer);
500 return_ACPI_STATUS (status);
503 /* Enable or disable a power resource for wake */
505 acpi_pwr_wake_enable(ACPI_HANDLE consumer, int enable)
508 struct acpi_powerconsumer *pc;
509 struct acpi_prw_data prw;
512 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
514 if (consumer == NULL)
515 return (AE_BAD_PARAMETER);
517 ACPI_SERIAL_BEGIN(powerres);
518 if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) {
519 if (ACPI_FAILURE(status = acpi_pwr_register_consumer(consumer)))
521 if ((pc = acpi_pwr_find_consumer(consumer)) == NULL)
522 panic("acpi wake added power consumer but can't find it");
526 if (acpi_parse_prw(consumer, &prw) != 0)
528 for (i = 0; i < prw.power_res_count; i++)
530 acpi_pwr_reference_resource(&prw.power_res[i], pc);
532 acpi_pwr_dereference_resource(pc);
534 if (prw.power_res_count > 0)
535 acpi_pwr_switch_power();
538 ACPI_SERIAL_END(powerres);
543 * Called to create a reference between a power consumer and a power resource
544 * identified in the object.
547 acpi_pwr_reference_resource(ACPI_OBJECT *obj, void *arg)
549 struct acpi_powerconsumer *pc = (struct acpi_powerconsumer *)arg;
550 struct acpi_powerreference *pr;
551 struct acpi_powerresource *rp;
555 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
556 ACPI_SERIAL_ASSERT(powerres);
558 res = acpi_GetReference(NULL, obj);
560 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
561 "can't create a power reference for object type %d\n",
566 /* Create/look up the resource */
567 if (ACPI_FAILURE(status = acpi_pwr_register_resource(res))) {
568 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
569 "couldn't register power resource %s - %s\n",
570 obj->String.Pointer, AcpiFormatException(status)));
573 if ((rp = acpi_pwr_find_resource(res)) == NULL) {
574 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "power resource list corrupted\n"));
577 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "found power resource %s\n",
578 acpi_name(rp->ap_resource)));
580 /* Create a reference between the consumer and resource */
581 if ((pr = malloc(sizeof(*pr), M_ACPIPWR, M_NOWAIT | M_ZERO)) == NULL) {
582 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
583 "allocation failed for a power consumer reference\n"));
586 pr->ar_consumer = pc;
587 pr->ar_resource = rp;
588 TAILQ_INSERT_TAIL(&pc->ac_references, pr, ar_clink);
589 TAILQ_INSERT_TAIL(&rp->ap_references, pr, ar_rlink);
595 acpi_pwr_dereference_resource(struct acpi_powerconsumer *pc)
597 struct acpi_powerreference *pr;
600 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
601 ACPI_SERIAL_ASSERT(powerres);
604 while ((pr = TAILQ_FIRST(&pc->ac_references)) != NULL) {
605 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "removing reference to %s\n",
606 acpi_name(pr->ar_resource->ap_resource)));
607 TAILQ_REMOVE(&pr->ar_resource->ap_references, pr, ar_rlink);
608 TAILQ_REMOVE(&pc->ac_references, pr, ar_clink);
617 * Switch power resources to conform to the desired state.
619 * Consumers may have modified the power resource list in an arbitrary
620 * fashion; we sweep it in sequence order.
623 acpi_pwr_switch_power(void)
625 struct acpi_powerresource *rp;
629 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
630 ACPI_SERIAL_ASSERT(powerres);
633 * Sweep the list forwards turning things on.
635 TAILQ_FOREACH(rp, &acpi_powerresources, ap_link) {
636 if (TAILQ_FIRST(&rp->ap_references) == NULL) {
637 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
638 "%s has no references, not turning on\n",
639 acpi_name(rp->ap_resource)));
643 /* We could cache this if we trusted it not to change under us */
644 status = acpi_GetInteger(rp->ap_resource, "_STA", &cur);
645 if (ACPI_FAILURE(status)) {
646 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get status of %s - %d\n",
647 acpi_name(rp->ap_resource), status));
648 /* XXX is this correct? Always switch if in doubt? */
650 } else if (rp->ap_state == ACPI_PWR_UNK)
654 * Switch if required. Note that we ignore the result of the switch
655 * effort; we don't know what to do if it fails, so checking wouldn't
658 if (rp->ap_state != ACPI_PWR_ON) {
659 status = AcpiEvaluateObject(rp->ap_resource, "_ON", NULL, NULL);
660 if (ACPI_FAILURE(status)) {
661 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
662 "failed to switch %s on - %s\n",
663 acpi_name(rp->ap_resource),
664 AcpiFormatException(status)));
666 rp->ap_state = ACPI_PWR_ON;
667 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "switched %s on\n",
668 acpi_name(rp->ap_resource)));
671 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "%s is already on\n",
672 acpi_name(rp->ap_resource)));
676 /* Sweep the list backwards turning things off. */
677 TAILQ_FOREACH_REVERSE(rp, &acpi_powerresources, acpi_powerresource_list,
680 if (TAILQ_FIRST(&rp->ap_references) != NULL) {
681 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
682 "%s has references, not turning off\n",
683 acpi_name(rp->ap_resource)));
687 /* We could cache this if we trusted it not to change under us */
688 status = acpi_GetInteger(rp->ap_resource, "_STA", &cur);
689 if (ACPI_FAILURE(status)) {
690 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get status of %s - %d\n",
691 acpi_name(rp->ap_resource), status));
692 /* XXX is this correct? Always switch if in doubt? */
694 } else if (rp->ap_state == ACPI_PWR_UNK)
698 * Switch if required. Note that we ignore the result of the switch
699 * effort; we don't know what to do if it fails, so checking wouldn't
702 if (rp->ap_state != ACPI_PWR_OFF) {
703 status = AcpiEvaluateObject(rp->ap_resource, "_OFF", NULL, NULL);
704 if (ACPI_FAILURE(status)) {
705 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS,
706 "failed to switch %s off - %s\n",
707 acpi_name(rp->ap_resource),
708 AcpiFormatException(status)));
710 rp->ap_state = ACPI_PWR_OFF;
711 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "switched %s off\n",
712 acpi_name(rp->ap_resource)));
715 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "%s is already off\n",
716 acpi_name(rp->ap_resource)));
720 return_ACPI_STATUS (AE_OK);
724 * Find a power resource's control structure.
726 static struct acpi_powerresource *
727 acpi_pwr_find_resource(ACPI_HANDLE res)
729 struct acpi_powerresource *rp;
731 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
732 ACPI_SERIAL_ASSERT(powerres);
734 TAILQ_FOREACH(rp, &acpi_powerresources, ap_link) {
735 if (rp->ap_resource == res)
743 * Find a power consumer's control structure.
745 static struct acpi_powerconsumer *
746 acpi_pwr_find_consumer(ACPI_HANDLE consumer)
748 struct acpi_powerconsumer *pc;
750 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
751 ACPI_SERIAL_ASSERT(powerres);
753 TAILQ_FOREACH(pc, &acpi_powerconsumers, ac_link) {
754 if (pc->ac_consumer == consumer)