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acpi_powerres.c (78993) acpi_powerres.c (79357)
1/*-
2 * Copyright (c) 2001 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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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
24 * SUCH DAMAGE.
25 *
1/*-
2 * Copyright (c) 2001 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 9 unchanged lines hidden (view full) ---

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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/acpica/acpi_powerres.c 78993 2001-06-29 20:32:29Z msmith $
26 * $FreeBSD: head/sys/dev/acpica/acpi_powerres.c 79357 2001-07-06 09:00:07Z msmith $
27 */
28
29#include "opt_acpi.h" /* XXX trim includes */
30#include <sys/param.h>
31#include <sys/kernel.h>
32#include <sys/proc.h>
33#include <sys/lock.h>
34#include <sys/malloc.h>

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72MALLOC_DEFINE(M_ACPIPWR, "acpipwr", "ACPI power resources");
73
74/*
75 * Hooks for the ACPI CA debugging infrastructure
76 */
77#define _COMPONENT ACPI_POWER
78MODULE_NAME("POWERRES")
79
27 */
28
29#include "opt_acpi.h" /* XXX trim includes */
30#include <sys/param.h>
31#include <sys/kernel.h>
32#include <sys/proc.h>
33#include <sys/lock.h>
34#include <sys/malloc.h>

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72MALLOC_DEFINE(M_ACPIPWR, "acpipwr", "ACPI power resources");
73
74/*
75 * Hooks for the ACPI CA debugging infrastructure
76 */
77#define _COMPONENT ACPI_POWER
78MODULE_NAME("POWERRES")
79
80/* return values from _STA on a power resource */
81#define ACPI_PWR_OFF 0
82#define ACPI_PWR_ON 1
83
80/*
81 * A relationship between a power resource and a consumer.
82 */
83struct acpi_powerreference {
84 struct acpi_powerconsumer *ar_consumer;
85 struct acpi_powerresource *ar_resource;
86 TAILQ_ENTRY(acpi_powerreference) ar_rlink; /* link on resource list */
87 TAILQ_ENTRY(acpi_powerreference) ar_clink; /* link on consumer */

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101 * A power resource.
102 */
103struct acpi_powerresource {
104 TAILQ_ENTRY(acpi_powerresource) ap_link;
105 TAILQ_HEAD(,acpi_powerreference) ap_references;
106 ACPI_HANDLE ap_resource; /* the resource's handle */
107 ACPI_INTEGER ap_systemlevel;
108 ACPI_INTEGER ap_order;
84/*
85 * A relationship between a power resource and a consumer.
86 */
87struct acpi_powerreference {
88 struct acpi_powerconsumer *ar_consumer;
89 struct acpi_powerresource *ar_resource;
90 TAILQ_ENTRY(acpi_powerreference) ar_rlink; /* link on resource list */
91 TAILQ_ENTRY(acpi_powerreference) ar_clink; /* link on consumer */

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105 * A power resource.
106 */
107struct acpi_powerresource {
108 TAILQ_ENTRY(acpi_powerresource) ap_link;
109 TAILQ_HEAD(,acpi_powerreference) ap_references;
110 ACPI_HANDLE ap_resource; /* the resource's handle */
111 ACPI_INTEGER ap_systemlevel;
112 ACPI_INTEGER ap_order;
109 int ap_state;
110#define ACPI_PWR_OFF 0
111#define ACPI_PWR_ON 1
112};
113
114TAILQ_HEAD(acpi_powerresource_list, acpi_powerresource) acpi_powerresources;
115TAILQ_HEAD(acpi_powerconsumer_list, acpi_powerconsumer) acpi_powerconsumers;
116
117static ACPI_STATUS acpi_pwr_register_consumer(ACPI_HANDLE consumer);
118static ACPI_STATUS acpi_pwr_deregister_consumer(ACPI_HANDLE consumer);
119static ACPI_STATUS acpi_pwr_register_resource(ACPI_HANDLE res);

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166
167 /* get the Power Resource object */
168 if ((status = acpi_EvaluateIntoBuffer(res, NULL, NULL, &buf)) != AE_OK) {
169 DEBUG_PRINT(TRACE_OBJECTS, ("no power resource object\n"));
170 goto out;
171 }
172 obj = buf.Pointer;
173 if (obj->Common.Type != ACPI_TYPE_POWER) {
113};
114
115TAILQ_HEAD(acpi_powerresource_list, acpi_powerresource) acpi_powerresources;
116TAILQ_HEAD(acpi_powerconsumer_list, acpi_powerconsumer) acpi_powerconsumers;
117
118static ACPI_STATUS acpi_pwr_register_consumer(ACPI_HANDLE consumer);
119static ACPI_STATUS acpi_pwr_deregister_consumer(ACPI_HANDLE consumer);
120static ACPI_STATUS acpi_pwr_register_resource(ACPI_HANDLE res);

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167
168 /* get the Power Resource object */
169 if ((status = acpi_EvaluateIntoBuffer(res, NULL, NULL, &buf)) != AE_OK) {
170 DEBUG_PRINT(TRACE_OBJECTS, ("no power resource object\n"));
171 goto out;
172 }
173 obj = buf.Pointer;
174 if (obj->Common.Type != ACPI_TYPE_POWER) {
174 DEBUG_PRINT(TRACE_OBJECTS, ("bad power resource object\n"));
175 status = AE_TYPE;
176 goto out;
175 DEBUG_PRINT(TRACE_OBJECTS, ("questionable power resource object %s\n", acpi_name(res)));
176 /* XXX ACPI CA seems to return ACPI_TYPE_ANY, needs to be fixed */
177 rp->ap_systemlevel = 0;
178 rp->ap_order = 0;
179 } else {
180 rp->ap_systemlevel = obj->PowerResource.SystemLevel;
181 rp->ap_order = obj->PowerResource.ResourceOrder;
177 }
182 }
178 rp->ap_systemlevel = obj->PowerResource.SystemLevel;
179 rp->ap_order = obj->PowerResource.ResourceOrder;
180
183
181 /* get the current state of the resource */
182 if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &rp->ap_state)) != AE_OK) {
183 /* XXX is this an error? */
184 DEBUG_PRINT(TRACE_OBJECTS, ("can't get current power resource state\n"));
185 goto out;
186 }
187
188 /* sort the resource into the list */
189 status = AE_OK;
190 srp = TAILQ_FIRST(&acpi_powerresources);
191 if ((srp == NULL) || (rp->ap_order < srp->ap_order)) {
192 TAILQ_INSERT_HEAD(&acpi_powerresources, rp, ap_link);
184 /* sort the resource into the list */
185 status = AE_OK;
186 srp = TAILQ_FIRST(&acpi_powerresources);
187 if ((srp == NULL) || (rp->ap_order < srp->ap_order)) {
188 TAILQ_INSERT_HEAD(&acpi_powerresources, rp, ap_link);
193 goto out;
189 goto done;
194 }
195 TAILQ_FOREACH(srp, &acpi_powerresources, ap_link)
196 if (rp->ap_order < srp->ap_order) {
197 TAILQ_INSERT_BEFORE(srp, rp, ap_link);
190 }
191 TAILQ_FOREACH(srp, &acpi_powerresources, ap_link)
192 if (rp->ap_order < srp->ap_order) {
193 TAILQ_INSERT_BEFORE(srp, rp, ap_link);
198 goto out;
194 goto done;
199 }
200 TAILQ_INSERT_TAIL(&acpi_powerresources, rp, ap_link);
195 }
196 TAILQ_INSERT_TAIL(&acpi_powerresources, rp, ap_link);
201 DEBUG_PRINT(TRACE_OBJECTS, ("registered power resource %s\n", acpi_name(res)));
202
197
198 done:
199 DEBUG_PRINT(TRACE_OBJECTS, ("registered power resource %s\n", acpi_name(res)));
203 out:
204 if (obj != NULL)
205 AcpiOsFree(obj);
206 if ((status != AE_OK) && (rp != NULL))
207 free(rp, M_ACPIPWR);
208 return_ACPI_STATUS(status);
209}
210

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392 } else {
393 reslist_object = NULL;
394 }
395
396 /*
397 * Now we are ready to switch, so kill off any current power resource references.
398 */
399 res_changed = 0;
200 out:
201 if (obj != NULL)
202 AcpiOsFree(obj);
203 if ((status != AE_OK) && (rp != NULL))
204 free(rp, M_ACPIPWR);
205 return_ACPI_STATUS(status);
206}
207

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389 } else {
390 reslist_object = NULL;
391 }
392
393 /*
394 * Now we are ready to switch, so kill off any current power resource references.
395 */
396 res_changed = 0;
400 TAILQ_FOREACH(pr, &pc->ac_references, ar_clink) {
401 TAILQ_REMOVE(&pr->ar_resource->ap_references, pr, ar_rlink);
397 while((pr = TAILQ_FIRST(&pc->ac_references)) != NULL) {
402 res_changed = 1;
398 res_changed = 1;
399 DEBUG_PRINT(TRACE_OBJECTS, ("removing reference to %s\n", acpi_name(pr->ar_resource->ap_resource)));
400 TAILQ_REMOVE(&pr->ar_resource->ap_references, pr, ar_rlink);
401 TAILQ_REMOVE(&pc->ac_references, pr, ar_clink);
402 free(pr, M_ACPIPWR);
403 }
404
405 /*
406 * Add new power resource references, if we have any. Traverse the
407 * package that we got from evaluating reslist_handle, and look up each
408 * of the resources that are referenced.
409 */
410 if (reslist_object != NULL) {

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441/*
442 * Called to create a reference between a power consumer and a power resource
443 * identified in the object.
444 */
445static void
446acpi_pwr_reference_resource(ACPI_OBJECT *obj, void *arg)
447{
448 struct acpi_powerconsumer *pc = (struct acpi_powerconsumer *)arg;
403 }
404
405 /*
406 * Add new power resource references, if we have any. Traverse the
407 * package that we got from evaluating reslist_handle, and look up each
408 * of the resources that are referenced.
409 */
410 if (reslist_object != NULL) {

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441/*
442 * Called to create a reference between a power consumer and a power resource
443 * identified in the object.
444 */
445static void
446acpi_pwr_reference_resource(ACPI_OBJECT *obj, void *arg)
447{
448 struct acpi_powerconsumer *pc = (struct acpi_powerconsumer *)arg;
449 struct acpi_powerreference *pr;
450 struct acpi_powerresource *rp;
451 ACPI_HANDLE res;
452 ACPI_STATUS status;
449
450 FUNCTION_TRACE(__func__);
451
453
454 FUNCTION_TRACE(__func__);
455
452 DEBUG_PRINT(TRACE_OBJECTS, ("called to create a reference using object type %d\n",
453 obj->Type));
456 /* check the object type */
457 if (obj->Type != ACPI_TYPE_STRING) {
458 DEBUG_PRINT(TRACE_OBJECTS, ("don't know how to create a power reference to object type %d\n",
459 obj->Type));
460 return_VOID;
461 }
454
462
463 DEBUG_PRINT(TRACE_OBJECTS, ("building reference from %s to %s\n",
464 acpi_name(pc->ac_consumer), obj->String.Pointer));
465
466 /* get the handle of the resource */
467 if (ACPI_FAILURE(status = AcpiGetHandle(NULL, obj->String.Pointer, &res))) {
468 DEBUG_PRINT(TRACE_OBJECTS, ("couldn't find power resource %s\n",
469 obj->String.Pointer));
470 return_VOID;
471 }
472
473 /* create/look up the resource */
474 if (ACPI_FAILURE(status = acpi_pwr_register_resource(res))) {
475 DEBUG_PRINT(TRACE_OBJECTS, ("couldn't register power resource %s - %s\n",
476 obj->String.Pointer, acpi_strerror(status)));
477 return_VOID;
478 }
479 if ((rp = acpi_pwr_find_resource(res)) == NULL) {
480 DEBUG_PRINT(TRACE_OBJECTS, ("power resource list corrupted\n"));
481 return_VOID;
482 }
483 DEBUG_PRINT(TRACE_OBJECTS, ("found power resource %s\n", acpi_name(rp->ap_resource)));
484
485 /* create a reference between the consumer and resource */
486 if ((pr = malloc(sizeof(*pr), M_ACPIPWR, M_NOWAIT | M_ZERO)) == NULL) {
487 DEBUG_PRINT(TRACE_OBJECTS, ("couldn't allocate memory for a power consumer reference\n"));
488 return_VOID;
489 }
490 pr->ar_consumer = pc;
491 pr->ar_resource = rp;
492 TAILQ_INSERT_TAIL(&pc->ac_references, pr, ar_clink);
493 TAILQ_INSERT_TAIL(&rp->ap_references, pr, ar_rlink);
494
455 return_VOID;
456}
457
458
459/*
460 * Switch power resources to conform to the desired state.
461 *
462 * Consumers may have modified the power resource list in an arbitrary

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470 int cur;
471
472 FUNCTION_TRACE(__func__);
473
474 /*
475 * Sweep the list forwards turning things on.
476 */
477 TAILQ_FOREACH(rp, &acpi_powerresources, ap_link) {
495 return_VOID;
496}
497
498
499/*
500 * Switch power resources to conform to the desired state.
501 *
502 * Consumers may have modified the power resource list in an arbitrary

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510 int cur;
511
512 FUNCTION_TRACE(__func__);
513
514 /*
515 * Sweep the list forwards turning things on.
516 */
517 TAILQ_FOREACH(rp, &acpi_powerresources, ap_link) {
478 if (rp->ap_state != ACPI_PWR_ON)
479 continue; /* not turning this one on */
518 if (TAILQ_FIRST(&rp->ap_references) == NULL) {
519 DEBUG_PRINT(TRACE_OBJECTS, ("%s has no references, not turning on\n",
520 acpi_name(rp->ap_resource)));
521 continue;
522 }
480
481 /* we could cache this if we trusted it not to change under us */
482 if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &cur)) != AE_OK) {
483 DEBUG_PRINT(TRACE_OBJECTS, ("can't get status of %s - %d\n",
484 acpi_name(rp->ap_resource), status));
485 continue; /* XXX is this correct? Always switch if in doubt? */
486 }
487
488 /*
489 * Switch if required. Note that we ignore the result of the switch
490 * effort; we don't know what to do if it fails, so checking wouldn't
491 * help much.
492 */
523
524 /* we could cache this if we trusted it not to change under us */
525 if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &cur)) != AE_OK) {
526 DEBUG_PRINT(TRACE_OBJECTS, ("can't get status of %s - %d\n",
527 acpi_name(rp->ap_resource), status));
528 continue; /* XXX is this correct? Always switch if in doubt? */
529 }
530
531 /*
532 * Switch if required. Note that we ignore the result of the switch
533 * effort; we don't know what to do if it fails, so checking wouldn't
534 * help much.
535 */
493 if (cur != ACPI_PWR_ON)
494 AcpiEvaluateObject(rp->ap_resource, "_ON", NULL, NULL);
536 if (cur != ACPI_PWR_ON) {
537 if (ACPI_FAILURE(status = AcpiEvaluateObject(rp->ap_resource, "_ON", NULL, NULL))) {
538 DEBUG_PRINT(TRACE_OBJECTS, ("failed to switch %s on - %s\n",
539 acpi_name(rp->ap_resource), acpi_strerror(status)));
540 } else {
541 DEBUG_PRINT(TRACE_OBJECTS, ("switched %s on\n", acpi_name(rp->ap_resource)));
542 }
543 } else {
544 DEBUG_PRINT(TRACE_OBJECTS, ("%s is already on\n", acpi_name(rp->ap_resource)));
545 }
495 }
496
497 /*
498 * Sweep the list backwards turning things off.
499 */
500 TAILQ_FOREACH_REVERSE(rp, &acpi_powerresources, acpi_powerresource_list, ap_link) {
546 }
547
548 /*
549 * Sweep the list backwards turning things off.
550 */
551 TAILQ_FOREACH_REVERSE(rp, &acpi_powerresources, acpi_powerresource_list, ap_link) {
501 if (rp->ap_state != ACPI_PWR_OFF)
502 continue; /* not turning this one off */
552 if (TAILQ_FIRST(&rp->ap_references) != NULL) {
553 DEBUG_PRINT(TRACE_OBJECTS, ("%s has references, not turning off\n",
554 acpi_name(rp->ap_resource)));
555 continue;
556 }
503
504 /* we could cache this if we trusted it not to change under us */
505 if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &cur)) != AE_OK) {
506 DEBUG_PRINT(TRACE_OBJECTS, ("can't get status of %s - %d\n",
507 acpi_name(rp->ap_resource), status));
508 continue; /* XXX is this correct? Always switch if in doubt? */
509 }
510
511 /*
512 * Switch if required. Note that we ignore the result of the switch
513 * effort; we don't know what to do if it fails, so checking wouldn't
514 * help much.
515 */
557
558 /* we could cache this if we trusted it not to change under us */
559 if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &cur)) != AE_OK) {
560 DEBUG_PRINT(TRACE_OBJECTS, ("can't get status of %s - %d\n",
561 acpi_name(rp->ap_resource), status));
562 continue; /* XXX is this correct? Always switch if in doubt? */
563 }
564
565 /*
566 * Switch if required. Note that we ignore the result of the switch
567 * effort; we don't know what to do if it fails, so checking wouldn't
568 * help much.
569 */
516 if (cur != ACPI_PWR_OFF)
517 AcpiEvaluateObject(rp->ap_resource, "_OFF", NULL, NULL);
570 if (cur != ACPI_PWR_OFF) {
571 if (ACPI_FAILURE(status = AcpiEvaluateObject(rp->ap_resource, "_OFF", NULL, NULL))) {
572 DEBUG_PRINT(TRACE_OBJECTS, ("failed to switch %s off - %s\n",
573 acpi_name(rp->ap_resource), acpi_strerror(status)));
574 } else {
575 DEBUG_PRINT(TRACE_OBJECTS, ("switched %s off\n", acpi_name(rp->ap_resource)));
576 }
577 } else {
578 DEBUG_PRINT(TRACE_OBJECTS, ("%s is already off\n", acpi_name(rp->ap_resource)));
579 }
518 }
519 return_ACPI_STATUS(AE_OK);
520}
521
522/*
523 * Find a power resource's control structure.
524 */
525static struct acpi_powerresource *

--- 28 unchanged lines hidden --- 		580 }
581 return_ACPI_STATUS(AE_OK);
582}
583
584/*
585 * Find a power resource's control structure.
586 */
587static struct acpi_powerresource *

--- 28 unchanged lines hidden ---