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Code Issues Releases Activity

Sync to my work in progress:

Browse Source 
- Reorder the acpi_* functions in a sensible fashion
 - Add acpi_ForeachPackageObject and acpi_GetHandleInScope
 - Use the new debugging layer/level names
 - Implement most of the guts of the acpi_thermal module; passive cooling
   isn't there yet, but active cooling should work.
 - Implement power resource handling (acpi_powerres.c)

This compiles and mostly works, but my test coverage is small, so feedback
is welcome.
This commit is contained in:
Mike Smith 2001-06-28 06:17:16 +00:00
parent 5b9eb1684e
commit c5ba0be495
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=78915
4 changed files with 1093 additions and 147 deletions
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289
sys/dev/acpica/acpi.c
View File

@ -706,6 +706,27 @@ acpi_enable_fixed_events(struct acpi_softc *sc)
first_time = 0;
}
/*
* Returns true if the device is actually present and should
* be attached to. This requires the present, enabled, UI-visible
* and diagnostics-passed bits to be set.
*/
BOOLEAN
acpi_DeviceIsPresent(device_t dev)
{
ACPI_HANDLE h;
ACPI_DEVICE_INFO devinfo;
ACPI_STATUS error;
if ((h = acpi_get_handle(dev)) == NULL)
return(FALSE);
if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK)
return(FALSE);
if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf))
return(TRUE);
return(FALSE);
}
/*
* Match a HID string against a device
*/
@ -727,6 +748,46 @@ acpi_MatchHid(device_t dev, char *hid)
return(FALSE);
}
/*
* Return the handle of a named object within our scope, ie. that of (parent)
* or one if its parents.
*/
ACPI_STATUS
acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
{
ACPI_HANDLE r;
ACPI_STATUS status;
/* walk back up the tree to the root */
for (;;) {
status = AcpiGetHandle(parent, path, &r);
if (status == AE_OK) {
*result = r;
return(AE_OK);
}
if (status != AE_NOT_FOUND)
return(AE_OK);
if (AcpiGetParent(parent, &r) != AE_OK)
return(AE_NOT_FOUND);
parent = r;
}
}
/*
* Allocate a buffer with a preset data size.
*/
ACPI_BUFFER *
acpi_AllocBuffer(int size)
{
ACPI_BUFFER *buf;
if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
return(NULL);
buf->Length = size;
buf->Pointer = (void *)(buf + 1);
return(buf);
}
/*
* Perform the tedious double-get procedure required for fetching something into
* an ACPI_BUFFER that has not been initialised.
@ -747,20 +808,75 @@ acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUF
}
/*
* Allocate a buffer with a preset data size.
* Perform the tedious double-evaluate procedure for evaluating something into
* an ACPI_BUFFER that has not been initialised. Note that this evaluates
* twice, so avoid applying this to things that may have side-effects.
*
* This is like AcpiEvaluateObject with automatic buffer allocation.
*/
ACPI_BUFFER *
acpi_AllocBuffer(int size)
ACPI_STATUS
acpi_EvaluateIntoBuffer(ACPI_HANDLE object, ACPI_STRING pathname, ACPI_OBJECT_LIST *params,
ACPI_BUFFER *buf)
{
ACPI_BUFFER *buf;
ACPI_STATUS status;
buf->Length = 0;
buf->Pointer = NULL;
if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
return(NULL);
buf->Length = size;
buf->Pointer = (void *)(buf + 1);
return(buf);
if ((status = AcpiEvaluateObject(object, pathname, params, buf)) != AE_BUFFER_OVERFLOW)
return(status);
if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL)
return(AE_NO_MEMORY);
return(AcpiEvaluateObject(object, pathname, params, buf));
}
/*
* Evaluate a path that should return an integer.
*/
ACPI_STATUS
acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number)
{
ACPI_STATUS error;
ACPI_BUFFER buf;
ACPI_OBJECT param;
if (handle == NULL)
handle = ACPI_ROOT_OBJECT;
buf.Pointer = &param;
buf.Length = sizeof(param);
if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) {
if (param.Type == ACPI_TYPE_INTEGER) {
*number = param.Integer.Value;
} else {
error = AE_TYPE;
}
}
return(error);
}
/*
* Iterate over the elements of an a package object, calling the supplied
* function for each element.
*
* XXX possible enhancement might be to abort traversal on error.
*/
ACPI_STATUS
acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg)
{
ACPI_OBJECT *comp;
int i;
if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE))
return(AE_BAD_PARAMETER);
/* iterate over components */
for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++)
func(comp, arg);
return(AE_OK);
}
static ACPI_STATUS __inline
acpi_wakeup(UINT8 state)
{
@ -952,51 +1068,6 @@ acpi_Disable(struct acpi_softc *sc)
return_ACPI_STATUS(status);
}
/*
* Returns true if the device is actually present and should
* be attached to. This requires the present, enabled, UI-visible
* and diagnostics-passed bits to be set.
*/
BOOLEAN
acpi_DeviceIsPresent(device_t dev)
{
ACPI_HANDLE h;
ACPI_DEVICE_INFO devinfo;
ACPI_STATUS error;
if ((h = acpi_get_handle(dev)) == NULL)
return(FALSE);
if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK)
return(FALSE);
if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf))
return(TRUE);
return(FALSE);
}
/*
* Evaluate a path that should return an integer.
*/
ACPI_STATUS
acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number)
{
ACPI_STATUS error;
ACPI_BUFFER buf;
ACPI_OBJECT param;
if (handle == NULL)
handle = ACPI_ROOT_OBJECT;
buf.Pointer = &param;
buf.Length = sizeof(param);
if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) {
if (param.Type == ACPI_TYPE_INTEGER) {
*number = param.Integer.Value;
} else {
error = AE_TYPE;
}
}
return(error);
}
/*
* ACPI Event Handlers
*/
@ -1347,63 +1418,67 @@ struct debugtag
};
static struct debugtag dbg_layer[] = {
{"GLOBAL", 0x00000001},
{"COMMON", 0x00000002},
{"PARSER", 0x00000004},
{"DISPATCHER", 0x00000008},
{"INTERPRETER", 0x00000010},
{"NAMESPACE", 0x00000020},
{"RESOURCE_MANAGER", 0x00000040},
{"TABLE_MANAGER", 0x00000080},
{"EVENT_HANDLING", 0x00000100},
{"HARDWARE", 0x00000200},
{"MISCELLANEOUS", 0x00000400},
{"OS_DEPENDENT", 0x00000800},
{"BUS_MANAGER", 0x00001000},
{"PROCESSOR_CONTROL", 0x00002000},
{"SYSTEM_CONTROL", 0x00004000},
{"THERMAL_CONTROL", 0x00008000},
{"POWER_CONTROL", 0x00010000},
{"EMBEDDED_CONTROLLER", 0x00020000},
{"BATTERY", 0x00040000},
{"DEBUGGER", 0x00100000},
{"ALL_COMPONENTS", 0x001FFFFF},
{"ACPI_UTILITIES", ACPI_UTILITIES},
{"ACPI_HARDWARE", ACPI_HARDWARE},
{"ACPI_EVENTS", ACPI_EVENTS},
{"ACPI_TABLES", ACPI_TABLES},
{"ACPI_NAMESPACE", ACPI_NAMESPACE},
{"ACPI_PARSER", ACPI_PARSER},
{"ACPI_DISPATCHER", ACPI_DISPATCHER},
{"ACPI_EXECUTER", ACPI_EXECUTER},
{"ACPI_RESOURCES", ACPI_RESOURCES},
{"ACPI_DEVICES", ACPI_DEVICES},
{"ACPI_POWER", ACPI_POWER},
{"ACPI_BUS_MANAGER", ACPI_BUS_MANAGER},
{"ACPI_POWER_CONTROL", ACPI_POWER_CONTROL},
{"ACPI_EMBEDDED_CONTROLLER", ACPI_EMBEDDED_CONTROLLER},
{"ACPI_PROCESSOR_CONTROL", ACPI_PROCESSOR_CONTROL},
{"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
{"ACPI_BATTERY", ACPI_BATTERY},
{"ACPI_BUTTON", ACPI_BUTTON},
{"ACPI_SYSTEM", ACPI_SYSTEM},
{"ACPI_THERMAL_ZONE", ACPI_THERMAL_ZONE},
{"ACPI_DEBUGGER", ACPI_DEBUGGER},
{"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
{"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
{NULL, 0}
};
static struct debugtag dbg_level[] = {
{"ACPI_OK", 0x00000001},
{"ACPI_INFO", 0x00000002},
{"ACPI_WARN", 0x00000004},
{"ACPI_ERROR", 0x00000008},
{"ACPI_FATAL", 0x00000010},
{"ACPI_DEBUG_OBJECT", 0x00000020},
{"ACPI_ALL", 0x0000003F},
{"TRACE_PARSE", 0x00000100},
{"TRACE_DISPATCH", 0x00000200},
{"TRACE_LOAD", 0x00000400},
{"TRACE_EXEC", 0x00000800},
{"TRACE_NAMES", 0x00001000},
{"TRACE_OPREGION", 0x00002000},
{"TRACE_BFIELD", 0x00004000},
{"TRACE_TRASH", 0x00008000},
{"TRACE_TABLES", 0x00010000},
{"TRACE_FUNCTIONS", 0x00020000},
{"TRACE_VALUES", 0x00040000},
{"TRACE_OBJECTS", 0x00080000},
{"TRACE_ALLOCATIONS", 0x00100000},
{"TRACE_RESOURCES", 0x00200000},
{"TRACE_IO", 0x00400000},
{"TRACE_INTERRUPTS", 0x00800000},
{"TRACE_USER_REQUESTS", 0x01000000},
{"TRACE_PACKAGE", 0x02000000},
{"TRACE_MUTEX", 0x04000000},
{"TRACE_ALL", 0x0FFFFF00},
{"VERBOSE_AML_DISASSEMBLE", 0x10000000},
{"VERBOSE_INFO", 0x20000000},
{"VERBOSE_TABLES", 0x40000000},
{"VERBOSE_EVENTS", 0x80000000},
{"VERBOSE_ALL", 0xF0000000},
{"ACPI_OK", ACPI_OK},
{"ACPI_INFO", ACPI_INFO},
{"ACPI_WARN", ACPI_WARN},
{"ACPI_ERROR", ACPI_ERROR},
{"ACPI_FATAL", ACPI_FATAL},
{"ACPI_DEBUG_OBJECT", ACPI_DEBUG_OBJECT},
{"ACPI_ALL", ACPI_ALL},
{"TRACE_THREADS", TRACE_THREADS},
{"TRACE_PARSE", TRACE_PARSE},
{"TRACE_DISPATCH", TRACE_DISPATCH},
{"TRACE_LOAD", TRACE_LOAD},
{"TRACE_EXEC", TRACE_EXEC},
{"TRACE_NAMES", TRACE_NAMES},
{"TRACE_OPREGION", TRACE_OPREGION},
{"TRACE_BFIELD", TRACE_BFIELD},
{"TRACE_TRASH", TRACE_TRASH},
{"TRACE_TABLES", TRACE_TABLES},
{"TRACE_FUNCTIONS", TRACE_FUNCTIONS},
{"TRACE_VALUES", TRACE_VALUES},
{"TRACE_OBJECTS", TRACE_OBJECTS},
{"TRACE_ALLOCATIONS", TRACE_ALLOCATIONS},
{"TRACE_RESOURCES", TRACE_RESOURCES},
{"TRACE_IO", TRACE_IO},
{"TRACE_INTERRUPTS", TRACE_INTERRUPTS},
{"TRACE_USER_REQUESTS", TRACE_USER_REQUESTS},
{"TRACE_PACKAGE", TRACE_PACKAGE},
{"TRACE_MUTEX", TRACE_MUTEX},
{"TRACE_INIT", TRACE_INIT},
{"TRACE_ALL", TRACE_ALL},
{"VERBOSE_AML_DISASSEMBLE", VERBOSE_AML_DISASSEMBLE},
{"VERBOSE_INFO", VERBOSE_INFO},
{"VERBOSE_TABLES", VERBOSE_TABLES},
{"VERBOSE_EVENTS", VERBOSE_EVENTS},
{"VERBOSE_ALL", VERBOSE_ALL},
{NULL, 0}
};

553
sys/dev/acpica/acpi_powerres.c Normal file
View File

@ -0,0 +1,553 @@
/*-
* Copyright (c) 2001 Michael Smith
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_acpi.h" /* XXX trim includes */
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/ioccom.h>
#include <sys/reboot.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/ctype.h>
#include <machine/clock.h>
#include <machine/resource.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
/*
* ACPI power resource management.
*
* Power resource behaviour is slightly complicated by the fact that
* a single power resource may provide power for more than one device.
* Thus, we must track the device(s) being powered by a given power
* resource, and only deactivate it when there are no powered devices.
*
* Note that this only manages resources for known devices. There is an
* ugly case where we may turn of power to a device which is in use because
* we don't know that it depends on a given resource. We should perhaps
* try to be smarter about this, but a more complete solution would involve
* scanning all of the ACPI namespace to find devices we're not currently
* aware of, and this raises questions about whether they should be left
* on, turned off, etc.
*
* XXX locking
*/
MALLOC_DEFINE(M_ACPIPWR, "acpipwr", "ACPI power resources");
/*
* Hooks for the ACPI CA debugging infrastructure
*/
#define _COMPONENT ACPI_POWER_CONTROL
MODULE_NAME("POWERRES")
/*
* A relationship between a power resource and a consumer.
*/
struct acpi_powerreference {
struct acpi_powerconsumer *ar_consumer;
struct acpi_powerresource *ar_resource;
TAILQ_ENTRY(acpi_powerreference) ar_rlink; /* link on resource list */
TAILQ_ENTRY(acpi_powerreference) ar_clink; /* link on consumer */
};
/*
* A power-managed device.
*/
struct acpi_powerconsumer {
ACPI_HANDLE ac_consumer; /* device which is powered */
int ac_state;
TAILQ_ENTRY(acpi_powerconsumer) ac_link;
TAILQ_HEAD(,acpi_powerreference) ac_references;
};
/*
* A power resource.
*/
struct acpi_powerresource {
TAILQ_ENTRY(acpi_powerresource) ap_link;
TAILQ_HEAD(,acpi_powerreference) ap_references;
ACPI_HANDLE ap_resource; /* the resource's handle */
ACPI_INTEGER ap_systemlevel;
ACPI_INTEGER ap_order;
int ap_state;
#define ACPI_PWR_OFF 0
#define ACPI_PWR_ON 1
};
TAILQ_HEAD(acpi_powerresource_list, acpi_powerresource) acpi_powerresources;
TAILQ_HEAD(acpi_powerconsumer_list, acpi_powerconsumer) acpi_powerconsumers;
static ACPI_STATUS acpi_pwr_register_consumer(ACPI_HANDLE consumer);
static ACPI_STATUS acpi_pwr_deregister_consumer(ACPI_HANDLE consumer);
static ACPI_STATUS acpi_pwr_register_resource(ACPI_HANDLE res);
static ACPI_STATUS acpi_pwr_deregister_resource(ACPI_HANDLE res);
static void acpi_pwr_reference_resource(ACPI_OBJECT *obj, void *arg);
static ACPI_STATUS acpi_pwr_switch_power(void);
static struct acpi_powerresource *acpi_pwr_find_resource(ACPI_HANDLE res);
static struct acpi_powerconsumer *acpi_pwr_find_consumer(ACPI_HANDLE consumer);
/*
* Initialise our lists.
*/
static void
acpi_pwr_init(void *junk)
{
TAILQ_INIT(&acpi_powerresources);
TAILQ_INIT(&acpi_powerconsumers);
}
SYSINIT(acpi_powerresource, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_pwr_init, NULL);
/*
* Register a power resource.
*
* It's OK to call this if we already know about the resource.
*/
static ACPI_STATUS
acpi_pwr_register_resource(ACPI_HANDLE res)
{
ACPI_STATUS status;
ACPI_BUFFER buf;
ACPI_OPERAND_OBJECT *obj;
struct acpi_powerresource *rp, *srp;
FUNCTION_TRACE(__func__);
rp = NULL;
obj = NULL;
/* look to see if we know about this resource */
if (acpi_pwr_find_resource(res) != NULL)
return_ACPI_STATUS(AE_OK); /* already know about it */
/* allocate a new resource */
if ((rp = malloc(sizeof(*rp), M_ACPIPWR, M_NOWAIT | M_ZERO)) == NULL) {
status = AE_NO_MEMORY;
goto out;
}
TAILQ_INIT(&rp->ap_references);
rp->ap_resource = res;
/* get the Power Resource object */
if ((status = acpi_EvaluateIntoBuffer(res, NULL, NULL, &buf)) != AE_OK) {
DEBUG_PRINT(TRACE_OBJECTS, ("no power resource object\n"));
goto out;
}
obj = buf.Pointer;
if (obj->Common.Type != ACPI_TYPE_POWER) {
DEBUG_PRINT(TRACE_OBJECTS, ("bad power resource object\n"));
status = AE_TYPE;
goto out;
}
rp->ap_systemlevel = obj->PowerResource.SystemLevel;
rp->ap_order = obj->PowerResource.ResourceOrder;
/* get the current state of the resource */
if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &rp->ap_state)) != AE_OK) {
/* XXX is this an error? */
DEBUG_PRINT(TRACE_OBJECTS, ("can't get current power resource state\n"));
goto out;
}
/* sort the resource into the list */
status = AE_OK;
srp = TAILQ_FIRST(&acpi_powerresources);
if ((srp == NULL) || (rp->ap_order < srp->ap_order)) {
TAILQ_INSERT_HEAD(&acpi_powerresources, rp, ap_link);
goto out;
}
TAILQ_FOREACH(srp, &acpi_powerresources, ap_link)
if (rp->ap_order < srp->ap_order) {
TAILQ_INSERT_BEFORE(srp, rp, ap_link);
goto out;
}
TAILQ_INSERT_TAIL(&acpi_powerresources, rp, ap_link);
DEBUG_PRINT(TRACE_OBJECTS, ("registered power resource %s\n", acpi_name(res)));
out:
if (obj != NULL)
AcpiOsFree(obj);
if ((status != AE_OK) && (rp != NULL))
free(rp, M_ACPIPWR);
return_ACPI_STATUS(status);
}
/*
* Deregister a power resource.
*/
static ACPI_STATUS
acpi_pwr_deregister_resource(ACPI_HANDLE res)
{
struct acpi_powerresource *rp;
FUNCTION_TRACE(__func__);
rp = NULL;
/* find the resource */
if ((rp = acpi_pwr_find_resource(res)) == NULL)
return_ACPI_STATUS(AE_BAD_PARAMETER);
/* check that there are no consumers referencing this resource */
if (TAILQ_FIRST(&rp->ap_references) != NULL)
return_ACPI_STATUS(AE_BAD_PARAMETER);
/* pull it off the list and free it */
TAILQ_REMOVE(&acpi_powerresources, rp, ap_link);
free(rp, M_ACPIPWR);
DEBUG_PRINT(TRACE_OBJECTS, ("deregistered power resource %s\n", acpi_name(res)));
return_ACPI_STATUS(AE_OK);
}
/*
* Register a power consumer.
*
* It's OK to call this if we already know about the consumer.
*/
static ACPI_STATUS
acpi_pwr_register_consumer(ACPI_HANDLE consumer)
{
struct acpi_powerconsumer *pc;
FUNCTION_TRACE(__func__);
/* check to see whether we know about this consumer already */
if ((pc = acpi_pwr_find_consumer(consumer)) != NULL)
return_ACPI_STATUS(AE_OK);
/* allocate a new power consumer */
if ((pc = malloc(sizeof(*pc), M_ACPIPWR, M_NOWAIT)) == NULL)
return_ACPI_STATUS(AE_NO_MEMORY);
TAILQ_INSERT_HEAD(&acpi_powerconsumers, pc, ac_link);
TAILQ_INIT(&pc->ac_references);
pc->ac_consumer = consumer;
pc->ac_state = ACPI_STATE_UNKNOWN; /* XXX we should try to find its current state */
DEBUG_PRINT(TRACE_OBJECTS, ("registered power consumer %s\n", acpi_name(consumer)));
return_ACPI_STATUS(AE_OK);
}
/*
* Deregister a power consumer.
*
* This should only be done once the consumer has been powered off.
* (XXX is this correct? Check once implemented)
*/
static ACPI_STATUS
acpi_pwr_deregister_consumer(ACPI_HANDLE consumer)
{
struct acpi_powerconsumer *pc;
FUNCTION_TRACE(__func__);
/* find the consumer */
if ((pc = acpi_pwr_find_consumer(consumer)) == NULL)
return_ACPI_STATUS(AE_BAD_PARAMETER);
/* make sure the consumer's not referencing anything right now */
if (TAILQ_FIRST(&pc->ac_references) != NULL)
return_ACPI_STATUS(AE_BAD_PARAMETER);
/* pull the consumer off the list and free it */
TAILQ_REMOVE(&acpi_powerconsumers, pc, ac_link);
DEBUG_PRINT(TRACE_OBJECTS, ("deregistered power consumer %s\n", acpi_name(consumer)));
return_ACPI_STATUS(AE_OK);
}
/*
* Set a power consumer to a particular power state.
*/
ACPI_STATUS
acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state)
{
struct acpi_powerconsumer *pc;
struct acpi_powerreference *pr;
ACPI_HANDLE method_handle, reslist_handle;
ACPI_BUFFER reslist_buffer;
ACPI_OBJECT *reslist_object;
ACPI_STATUS status;
char *method_name, *reslist_name;
int res_changed;
FUNCTION_TRACE(__func__);
/* find the consumer */
if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) {
if ((status = acpi_pwr_register_consumer(consumer)) != AE_OK)
return_ACPI_STATUS(status);
if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) {
return_ACPI_STATUS(AE_ERROR); /* something very wrong */
}
}
/* check for valid transitions */
if ((pc->ac_state == ACPI_STATE_D3) && (state != ACPI_STATE_D0))
return_ACPI_STATUS(AE_BAD_PARAMETER); /* can only go to D0 from D3 */
/* find transition mechanism(s) */
switch(state) {
case ACPI_STATE_D0:
method_name = "_PS0";
reslist_name = "_PR0";
break;
case ACPI_STATE_D1:
method_name = "_PS1";
reslist_name = "_PR1";
break;
case ACPI_STATE_D2:
method_name = "_PS2";
reslist_name = "_PR2";
break;
case ACPI_STATE_D3:
method_name = "_PS3";
reslist_name = "_PR3";
break;
default:
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
DEBUG_PRINT(TRACE_OBJECTS, ("setup to switch %s D%d -> D%d\n",
acpi_name(consumer), pc->ac_state, state));
/*
* Verify that this state is supported, ie. one of method or
* reslist must be present. We need to do this before we go
* dereferencing resources (since we might be trying to go to
* a state we don't support).
*
* Note that if any states are supported, the device has to
* support D0 and D3. It's never an error to try to go to
* D0.
*/
if (AcpiGetHandle(consumer, method_name, &method_handle) != AE_OK)
method_handle = NULL;
if (AcpiGetHandle(consumer, reslist_name, &reslist_handle) != AE_OK)
reslist_handle = NULL;
if ((reslist_handle == NULL) && (method_handle == NULL)) {
if (state == ACPI_STATE_D0) {
pc->ac_state = ACPI_STATE_D0;
return_ACPI_STATUS(AE_OK);
}
DEBUG_PRINT(TRACE_OBJECTS, ("attempt to set unsupported state D%d\n",
state));
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* Check that we can actually fetch the list of power resources
*/
if (reslist_handle != NULL) {
if ((status = acpi_EvaluateIntoBuffer(reslist_handle, NULL, NULL, &reslist_buffer)) != AE_OK) {
DEBUG_PRINT(TRACE_OBJECTS, ("can't evaluate resource list %s\n",
acpi_name(reslist_handle)));
return_ACPI_STATUS(status);
}
reslist_object = (ACPI_OBJECT *)reslist_buffer.Pointer;
if (reslist_object->Type != ACPI_TYPE_PACKAGE) {
DEBUG_PRINT(TRACE_OBJECTS, ("resource list is not ACPI_TYPE_PACKAGE (%d)\n",
reslist_object->Type));
return_ACPI_STATUS(AE_TYPE);
}
} else {
reslist_object = NULL;
}
/*
* Now we are ready to switch, so kill off any current power resource references.
*/
res_changed = 0;
TAILQ_FOREACH(pr, &pc->ac_references, ar_clink) {
TAILQ_REMOVE(&pr->ar_resource->ap_references, pr, ar_rlink);
res_changed = 1;
}
/*
* Add new power resource references, if we have any. Traverse the
* package that we got from evaluating reslist_handle, and look up each
* of the resources that are referenced.
*/
if (reslist_object != NULL) {
DEBUG_PRINT(TRACE_OBJECTS, ("referencing %d new resources\n",
reslist_object->Package.Count));
acpi_ForeachPackageObject(reslist_object, acpi_pwr_reference_resource, pc);
res_changed = 1;
}
/*
* If we changed anything in the resource list, we need to run a switch
* pass now.
*/
if ((status = acpi_pwr_switch_power()) != AE_OK) {
DEBUG_PRINT(TRACE_OBJECTS, ("failed to correctly switch resources to move %s to D%d\n",
acpi_name(consumer), state));
return_ACPI_STATUS(status); /* XXX is this appropriate? Should we return to previous state? */
}
/* invoke power state switch method (if present) */
if (method_handle != NULL) {
DEBUG_PRINT(TRACE_OBJECTS, ("invoking state transition method %s\n",
acpi_name(method_handle)));
if ((status = AcpiEvaluateObject(method_handle, NULL, NULL, NULL)) != AE_OK)
pc->ac_state = ACPI_STATE_UNKNOWN;
return_ACPI_STATUS(status); /* XXX is this appropriate? Should we return to previous state? */
}
/* transition was successful */
pc->ac_state = state;
return_ACPI_STATUS(AE_OK);
}
/*
* Called to create a reference between a power consumer and a power resource
* identified in the object.
*/
static void
acpi_pwr_reference_resource(ACPI_OBJECT *obj, void *arg)
{
struct acpi_powerconsumer *pc = (struct acpi_powerconsumer *)arg;
FUNCTION_TRACE(__func__);
DEBUG_PRINT(TRACE_OBJECTS, ("called to create a reference using object type %d\n",
obj->Type));
return_VOID;
}
/*
* Switch power resources to conform to the desired state.
*
* Consumers may have modified the power resource list in an arbitrary
* fashion; we sweep it in sequence order.
*/
static ACPI_STATUS
acpi_pwr_switch_power(void)
{
struct acpi_powerresource *rp;
ACPI_STATUS status;
int cur;
FUNCTION_TRACE(__func__);
/*
* Sweep the list forwards turning things on.
*/
TAILQ_FOREACH(rp, &acpi_powerresources, ap_link) {
if (rp->ap_state != ACPI_PWR_ON)
continue; /* not turning this one on */
/* we could cache this if we trusted it not to change under us */
if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &cur)) != AE_OK) {
DEBUG_PRINT(TRACE_OBJECTS, ("can't get status of %s - %d\n",
acpi_name(rp->ap_resource), status));
continue; /* XXX is this correct? Always switch if in doubt? */
}
/*
* Switch if required. Note that we ignore the result of the switch
* effort; we don't know what to do if it fails, so checking wouldn't
* help much.
*/
if (cur != ACPI_PWR_ON)
AcpiEvaluateObject(rp->ap_resource, "_ON", NULL, NULL);
}
/*
* Sweep the list backwards turning things off.
*/
TAILQ_FOREACH_REVERSE(rp, &acpi_powerresources, acpi_powerresource_list, ap_link) {
if (rp->ap_state != ACPI_PWR_OFF)
continue; /* not turning this one off */
/* we could cache this if we trusted it not to change under us */
if ((status = acpi_EvaluateInteger(rp->ap_resource, "_STA", &cur)) != AE_OK) {
DEBUG_PRINT(TRACE_OBJECTS, ("can't get status of %s - %d\n",
acpi_name(rp->ap_resource), status));
continue; /* XXX is this correct? Always switch if in doubt? */
}
/*
* Switch if required. Note that we ignore the result of the switch
* effort; we don't know what to do if it fails, so checking wouldn't
* help much.
*/
if (cur != ACPI_PWR_OFF)
AcpiEvaluateObject(rp->ap_resource, "_OFF", NULL, NULL);
}
return_ACPI_STATUS(AE_OK);
}
/*
* Find a power resource's control structure.
*/
static struct acpi_powerresource *
acpi_pwr_find_resource(ACPI_HANDLE res)
{
struct acpi_powerresource *rp;
FUNCTION_TRACE(__func__);
TAILQ_FOREACH(rp, &acpi_powerresources, ap_link)
if (rp->ap_resource == res)
break;
return_VALUE(rp);
}
/*
* Find a power consumer's control structure.
*/
static struct acpi_powerconsumer *
acpi_pwr_find_consumer(ACPI_HANDLE consumer)
{
struct acpi_powerconsumer *pc;
FUNCTION_TRACE(__func__);
TAILQ_FOREACH(pc, &acpi_powerconsumers, ac_link)
if (pc->ac_consumer == consumer)
break;
return_VALUE(pc);
}

380
sys/dev/acpica/acpi_thermal.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2000, 2001 Michael Smith
* Copyright (c) 2000 BSDi
* All rights reserved.
*
@ -31,6 +31,7 @@
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/reboot.h>
#include "acpi.h"
@ -45,16 +46,50 @@ MODULE_NAME("THERMAL")
#define TZ_ZEROC 2732
#define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), (((x) - TZ_ZEROC) % 10)
#define TZ_NOTIFY_TEMPERATURE 0x80
#define TZ_NOTIFY_DEVICES 0x81
#define TZ_NOTIFY_LEVELS 0x82
#define TZ_POLLRATE (hz * 10) /* every ten seconds */
#define TZ_NUMLEVELS 10 /* defined by ACPI spec */
struct acpi_tz_state {
int ac[TZ_NUMLEVELS];
ACPI_BUFFER al[TZ_NUMLEVELS];
int crt;
int hot;
ACPI_BUFFER psl;
int psv;
int tc1;
int tc2;
int tsp;
int tzp;
};
struct acpi_tz_softc {
device_t tz_dev;
ACPI_HANDLE tz_handle;
int tz_tmp;
device_t tz_dev;
ACPI_HANDLE tz_handle;
struct callout_handle tz_timeout;
int tz_current;
#define TZ_STATE_NONE 0
#define TZ_STATE_PSV 1
#define TZ_STATE_AC0 2
#define TZ_STATE_HOT (TZ_STATE_AC0 + TZ_NUMLEVELS)
#define TZ_STATE_CRT (TZ_STATE_AC0 + TZ_NUMLEVELS + 1)
struct acpi_tz_state tz_state;
};
static int acpi_tz_probe(device_t dev);
static int acpi_tz_attach(device_t dev);
static void acpi_tz_check_tripping_point(void *context);
static int acpi_tz_establish(struct acpi_tz_softc *sc);
static void acpi_tz_all_off(struct acpi_tz_softc *sc);
static void acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg);
static void acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg);
static void acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, int *data);
static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context);
static void acpi_tz_timeout(void *arg);
static device_method_t acpi_tz_methods[] = {
/* Device interface */
@ -73,25 +108,31 @@ static driver_t acpi_tz_driver = {
devclass_t acpi_tz_devclass;
DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, 0, 0);
/*
* Match an ACPI thermal zone.
*/
static int
acpi_tz_probe(device_t dev)
{
FUNCTION_TRACE(__func__);
/* no FUNCTION_TRACE - too noisy */
if ((acpi_get_type(dev) == ACPI_TYPE_THERMAL) &&
!acpi_disabled("thermal")) {
device_set_desc(dev, "thermal zone");
return_VALUE(0);
return(-10);
}
return_VALUE(ENXIO);
return(ENXIO);
}
/*
* Attach to an ACPI thermal zone.
*/
static int
acpi_tz_attach(device_t dev)
{
struct acpi_tz_softc *sc;
struct acpi_softc *acpi_sc;
int error;
FUNCTION_TRACE(__func__);
@ -99,17 +140,19 @@ acpi_tz_attach(device_t dev)
sc->tz_dev = dev;
sc->tz_handle = acpi_get_handle(dev);
/*
* Parse the current state of the thermal zone and build control
* structures.
*/
if ((error = acpi_tz_establish(sc)) != 0)
return_VALUE(error);
/*
* Register for any Notify events sent to this zone.
*/
AcpiInstallNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY,
acpi_tz_notify_handler, dev);
if (device_get_unit(dev) == 0) {
acpi_sc = acpi_device_get_parent_softc(dev);
SYSCTL_ADD_UINT(&acpi_sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
OID_AUTO, "temperature", CTLFLAG_RD,
&sc->tz_tmp, 0, "");
}
/*
* Don't bother evaluating/printing the temperature at this point;
* on many systems it'll be bogus until the EC is running.
@ -117,43 +160,306 @@ acpi_tz_attach(device_t dev)
return_VALUE(0);
}
static void
acpi_tz_check_tripping_point(void *context)
/*
* Parse the current state of this thermal zone and set up to use it.
*
* Note that we may have previous state, which will have to be discarded.
*/
static int
acpi_tz_establish(struct acpi_tz_softc *sc)
{
struct acpi_tz_softc *sc;
device_t dev = context;
ACPI_STATUS status;
int tp;
ACPI_OBJECT *obj;
int i;
char nbuf[8];
FUNCTION_TRACE(__func__);
/*
* Power everything off and erase any existing state.
*/
acpi_tz_all_off(sc);
for (i = 0; i < TZ_NUMLEVELS; i++)
if (sc->tz_state.al[i].Pointer != NULL)
AcpiOsFree(sc->tz_state.al[i].Pointer);
if (sc->tz_state.psl.Pointer != NULL)
AcpiOsFree(sc->tz_state.psl.Pointer);
bzero(&sc->tz_state, sizeof(sc->tz_state));
/* kill the timeout (harmless if not running */
untimeout(acpi_tz_timeout, sc, sc->tz_timeout);
/*
* Evaluate thermal zone parameters.
*/
for (i = 0; i < TZ_NUMLEVELS; i++) {
sprintf(nbuf, "_AC%d", i);
acpi_tz_getparam(sc, nbuf, &sc->tz_state.ac[i]);
sprintf(nbuf, "_AL%d", i);
acpi_EvaluateIntoBuffer(sc->tz_handle, nbuf, NULL, &sc->tz_state.al[i]);
obj = (ACPI_OBJECT *)sc->tz_state.al[i].Pointer;
if (obj != NULL) {
/* should be a package containing a list of power objects */
if (obj->Type != ACPI_TYPE_PACKAGE) {
device_printf(sc->tz_dev, "%s has unknown object type %d, rejecting\n",
nbuf, obj->Type);
return_VALUE(ENXIO);
}
}
}
acpi_tz_getparam(sc, "_CRT", &sc->tz_state.crt);
acpi_tz_getparam(sc, "_HOT", &sc->tz_state.hot);
acpi_EvaluateIntoBuffer(sc->tz_handle, "_PSL", NULL, &sc->tz_state.psl);
acpi_tz_getparam(sc, "_PSV", &sc->tz_state.psv);
acpi_tz_getparam(sc, "_TC1", &sc->tz_state.tc1);
acpi_tz_getparam(sc, "_TC2", &sc->tz_state.tc2);
acpi_tz_getparam(sc, "_TSP", &sc->tz_state.tsp);
acpi_tz_getparam(sc, "_TZP", &sc->tz_state.tzp);
/*
* Power off everything that we've just been given.
*/
acpi_tz_all_off(sc);
/*
* Do we need to poll the thermal zone? Ignore the suggested
* rate.
*/
if (sc->tz_state.tzp != 0)
sc->tz_timeout = timeout(acpi_tz_timeout, sc, TZ_POLLRATE);
return_VALUE(0);
}
/*
* Evaluate the condition of a thermal zone, take appropriate actions.
*/
static void
acpi_tz_monitor(struct acpi_tz_softc *sc)
{
int temp, new;
int i;
FUNCTION_TRACE(__func__);
sc = device_get_softc(dev);
if ((status = acpi_EvaluateInteger(sc->tz_handle, "_TMP", &tp)) != AE_OK) {
device_printf(dev, "can't evaluate _TMP method - %s\n", acpi_strerror(status));
/*
* Get the current temperature.
*/
if ((acpi_EvaluateInteger(sc->tz_handle, "_TMP", &temp)) != AE_OK) {
device_printf(sc->tz_dev, "error fetching current temperature\n");
/* XXX disable zone? go to max cooling? */
return_VOID;
}
/*
* Work out what we ought to be doing right now.
*/
new = TZ_STATE_NONE;
if ((sc->tz_state.psv != -1) && (temp > sc->tz_state.psv))
new = TZ_STATE_PSV;
for (i = 0; i < TZ_NUMLEVELS; i++)
if ((sc->tz_state.ac[i] != -1) && (temp > sc->tz_state.ac[i]))
new = TZ_STATE_AC0 + i;
if ((sc->tz_state.hot != -1) && (temp > sc->tz_state.hot))
new = TZ_STATE_HOT;
if ((sc->tz_state.crt != -1) && (temp > sc->tz_state.crt))
new = TZ_STATE_CRT;
/*
* If our state has not changed, do nothing.
*/
if (new == sc->tz_current)
return_VOID;
sc->tz_tmp = (tp - TZ_ZEROC) / 10;
if (bootverbose) {
device_printf(dev, "%dC\n", sc->tz_tmp);
/*
* XXX if we're in a passive-cooling mode, revert to full-speed operation.
*/
if (sc->tz_current == TZ_STATE_PSV) {
/* XXX implement */
}
/*
* If we're in an active-cooling mode, turn off the current cooler(s).
*/
if ((sc->tz_current >= TZ_STATE_AC0) && (sc->tz_current < (TZ_STATE_AC0 + TZ_NUMLEVELS)))
acpi_ForeachPackageObject((ACPI_OBJECT *)sc->tz_state.al[sc->tz_current - TZ_STATE_AC0].Pointer,
acpi_tz_switch_cooler_off, sc);
/*
* XXX If the new mode is passive-cooling, make appropriate adjustments.
*/
/*
* If the new mode is an active-cooling mode, turn on the new cooler(s).
*/
if ((new >= TZ_STATE_AC0) && (new < (TZ_STATE_AC0 + TZ_NUMLEVELS)))
acpi_ForeachPackageObject((ACPI_OBJECT *)sc->tz_state.al[new - TZ_STATE_AC0].Pointer,
acpi_tz_switch_cooler_on, sc);
/*
* If we're _HOT or _CRT, shut down now!
*/
if ((new == TZ_STATE_HOT) || (new == TZ_STATE_CRT)) {
device_printf(sc->tz_dev, "WARNING - emergency thermal shutdown in progress.\n");
shutdown_nice(RB_POWEROFF);
}
/* gone to new state */
sc->tz_current = new;
return_VOID;
}
#define ACPI_TZ_STATUS_CHANGE 0x80
#define ACPI_TZ_TRIPPOINT_CHANGE 0x81
/*
* Turn off all the cooling devices.
*/
static void
acpi_tz_all_off(struct acpi_tz_softc *sc)
{
int i;
FUNCTION_TRACE(__func__);
/*
* Scan all the _AL objects, and turn them all off.
*/
for (i = 0; i < TZ_NUMLEVELS; i++) {
if (sc->tz_state.al[i].Pointer == NULL)
continue;
acpi_ForeachPackageObject((ACPI_OBJECT *)sc->tz_state.al[i].Pointer,
acpi_tz_switch_cooler_off, sc);
}
/*
* XXX revert any passive-cooling options.
*/
sc->tz_current = TZ_STATE_NONE;
return_VOID;
}
/*
* Given an object, verify that it's a reference to a device of some sort,
* and try to switch it off.
*/
static void
acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg)
{
struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
ACPI_HANDLE cooler;
FUNCTION_TRACE(__func__);
switch(obj->Type) {
case ACPI_TYPE_STRING:
DEBUG_PRINT(TRACE_OBJECTS, ("called to turn %s off\n", obj->String.Pointer));
/*
* Find the handle for the device and turn it off.
* The String object here seems to contain a fully-qualified path, so we
* don't have to search for it in our parents.
*
* XXX This may not always be the case.
*/
if (AcpiGetHandle(obj->String.Pointer, NULL, &cooler) == AE_OK)
acpi_pwr_switch_consumer(cooler, ACPI_STATE_D3);
break;
default:
DEBUG_PRINT(TRACE_OBJECTS, ("called to handle unsupported object type %d\n",
obj->Type));
break;
}
return_VOID;
}
/*
* Given an object, verify that it's a reference to a device of some sort,
* and try to switch it on.
*
* XXX replication of off/on function code is bad, mmmkay?
*/
static void
acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg)
{
struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
ACPI_HANDLE cooler, parent;
FUNCTION_TRACE(__func__);
switch(obj->Type) {
case ACPI_TYPE_STRING:
DEBUG_PRINT(TRACE_OBJECTS, ("called to turn %s off\n", obj->String.Pointer));
/* find the handle for the device and turn it off */
if (acpi_GetHandleInScope(sc->tz_handle, obj->String.Pointer, &cooler) == AE_OK)
acpi_pwr_switch_consumer(cooler, ACPI_STATE_D0);
break;
default:
DEBUG_PRINT(TRACE_OBJECTS, ("called to handle unsupported object type %d\n",
obj->Type));
break;
}
return_VOID;
}
/*
* Read/debug-print a parameter, default it to -1.
*/
static void
acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, int *data)
{
FUNCTION_TRACE(__func__);
if (acpi_EvaluateInteger(sc->tz_handle, node, data) != AE_OK) {
*data = -1;
} else {
DEBUG_PRINT(TRACE_VALUES, ("%s.%s = %d\n", acpi_name(sc->tz_handle),
node, *data));
}
return_VOID;
}
/*
* Respond to a Notify event sent to the zone.
*/
static void
acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
{
struct acpi_tz_softc *sc = (struct acpi_tz_softc *)context;
FUNCTION_TRACE(__func__);
switch(notify){
case ACPI_TZ_STATUS_CHANGE:
case ACPI_TZ_TRIPPOINT_CHANGE:
/*Check trip point*/
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_tz_check_tripping_point, context);
break;
switch(notify) {
case TZ_NOTIFY_TEMPERATURE:
acpi_tz_monitor(sc); /* temperature change occurred */
break;
case TZ_NOTIFY_DEVICES:
case TZ_NOTIFY_LEVELS:
acpi_tz_establish(sc); /* zone devices/setpoints changed */
break;
default:
device_printf(sc->tz_dev, "unknown Notify event 0x%x\n", notify);
break;
}
return_VOID;
}
/*
* Poll the thermal zone.
*/
static void
acpi_tz_timeout(void *arg)
{
struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
/* check temperature, take action */
acpi_tz_monitor(sc);
/* XXX passive cooling actions? */
/* re-register ourself */
sc->tz_timeout = timeout(acpi_tz_timeout, sc, TZ_POLLRATE);
}

18
sys/dev/acpica/acpivar.h
View File

@ -164,16 +164,23 @@ extern void acpi_EnterDebugger(void);
#define STEP(x)
#endif
extern BOOLEAN acpi_DeviceIsPresent(device_t dev);
extern BOOLEAN acpi_MatchHid(device_t dev, char *hid);
extern ACPI_STATUS acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result);
extern ACPI_BUFFER *acpi_AllocBuffer(int size);
extern ACPI_STATUS acpi_GetIntoBuffer(ACPI_HANDLE handle,
ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *),
ACPI_BUFFER *buf);
extern ACPI_BUFFER *acpi_AllocBuffer(int size);
extern ACPI_STATUS acpi_EvaluateIntoBuffer(ACPI_HANDLE object, ACPI_STRING pathname,
ACPI_OBJECT_LIST *params, ACPI_BUFFER *buf);
extern ACPI_STATUS acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number);
extern ACPI_STATUS acpi_ForeachPackageObject(ACPI_OBJECT *obj,
void (* func)(ACPI_OBJECT *comp, void *arg),
void *arg);
extern ACPI_STATUS acpi_SetSleepState(struct acpi_softc *sc, int state);
extern ACPI_STATUS acpi_Enable(struct acpi_softc *sc);
extern ACPI_STATUS acpi_Disable(struct acpi_softc *sc);
extern BOOLEAN acpi_DeviceIsPresent(device_t dev);
extern ACPI_STATUS acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number);
struct acpi_parse_resource_set {
void (* set_init)(device_t dev, void **context);
@ -214,6 +221,11 @@ typedef void (*acpi_event_handler_t) __P((void *, int));
EVENTHANDLER_DECLARE(acpi_sleep_event, acpi_event_handler_t);
EVENTHANDLER_DECLARE(acpi_wakeup_event, acpi_event_handler_t);
/*
* Device power control.
*/
extern ACPI_STATUS acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state);
/*
* Misc.
*/