power.cpp File Reference

#include "private.hpp"
#include <debug.h>

Include dependency graph for power.cpp:

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Macros
#define	NDEBUG

Functions
NTSTATUS NTAPI	PcRegisterAdapterPowerManagement (IN PUNKNOWN pUnknown, IN PVOID pvContext)
NTSTATUS NTAPI	PcUnregisterAdapterPowerManagement (IN PDEVICE_OBJECT DeviceObject)
static VOID NTAPI	PwrCompletionCallback (IN PDEVICE_OBJECT DeviceObject, IN UCHAR MinorFunction, IN POWER_STATE PowerState, IN PVOID Context, IN PIO_STATUS_BLOCK IoStatus)
NTSTATUS NTAPI	PcRequestNewPowerState (IN PDEVICE_OBJECT DeviceObject, IN DEVICE_POWER_STATE RequestedNewState)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 11 of file power.cpp.

Function Documentation

PcRegisterAdapterPowerManagement()

NTSTATUS NTAPI PcRegisterAdapterPowerManagement	(	IN PUNKNOWN	pUnknown,
		IN PVOID	pvContext
	)

Definition at line 16 of file power.cpp.

{
    NTSTATUS Status;
    PDEVICE_OBJECT pDeviceObject;
    PPCLASS_DEVICE_EXTENSION DeviceExt;
    IAdapterPowerManagement * pPower;
 
    DPRINT("PcRegisterAdapterPowerManagement pUnknown %p pvContext %p\n", pUnknown, pvContext);
    PC_ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
 
    if (!pUnknown || !pvContext)
        return STATUS_INVALID_PARAMETER;
 
    pDeviceObject = (PDEVICE_OBJECT)pvContext;
    DeviceExt = (PPCLASS_DEVICE_EXTENSION)pDeviceObject->DeviceExtension;
 
    Status = pUnknown->QueryInterface(IID_IAdapterPowerManagement, (PVOID*)&pPower);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("PcRegisterAdapterPowerManagement no IAdapterPowerManagement interface %x\n", Status);
        DeviceExt->AdapterPowerManagement = NULL;
        return STATUS_SUCCESS;
    }
 
    DeviceExt->AdapterPowerManagement = pPower;
    DPRINT("PcRegisterAdapterPowerManagement success %x\n", Status);
    return STATUS_SUCCESS;
}

Referenced by StartDevice().

PcRequestNewPowerState()

NTSTATUS NTAPI PcRequestNewPowerState	(	IN PDEVICE_OBJECT	DeviceObject,
		IN DEVICE_POWER_STATE	RequestedNewState
	)

Definition at line 85 of file power.cpp.

{
    KEVENT Event;
    NTSTATUS Status;
    POWER_STATE PowerState;
    PPCLASS_DEVICE_EXTENSION DeviceExt;
 
    PC_ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
 
    if (!DeviceObject || !RequestedNewState)
        return STATUS_INVALID_PARAMETER;
 
    DeviceExt = (PPCLASS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
    KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 
    PowerState.DeviceState = RequestedNewState;
    PowerState.SystemState = PowerSystemUnspecified;
 
    Status = PoRequestPowerIrp(DeviceExt->PhysicalDeviceObject, IRP_MN_SET_POWER, PowerState, PwrCompletionCallback, (PVOID)&Event, NULL);
    if (NT_SUCCESS(Status))
    {
        KeWaitForSingleObject((PVOID)&Event, Executive, KernelMode, FALSE, NULL);
    }
 
    return Status;
}

PcUnregisterAdapterPowerManagement()

NTSTATUS NTAPI PcUnregisterAdapterPowerManagement

(

IN PDEVICE_OBJECT

DeviceObject

)

Definition at line 49 of file power.cpp.

{
    PPCLASS_DEVICE_EXTENSION DeviceExt;
 
    DPRINT("PcUnregisterAdapterPowerManagement pUnknown %p pvContext %p\n", DeviceObject);
    PC_ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
 
    if (!DeviceObject)
        return STATUS_INVALID_PARAMETER;
 
    DeviceExt = (PPCLASS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
 
    if (DeviceExt->AdapterPowerManagement)
    {
        DeviceExt->AdapterPowerManagement->Release();
    }
    DeviceExt->AdapterPowerManagement = NULL;
    return STATUS_SUCCESS;
}

PwrCompletionCallback()

static VOID NTAPI PwrCompletionCallback ( IN PDEVICE_OBJECT  DeviceObject, IN UCHAR  MinorFunction, IN POWER_STATE  PowerState, IN PVOID  Context, IN PIO_STATUS_BLOCK  IoStatus  )

static

Definition at line 73 of file power.cpp.

{
    KeSetEvent((PRKEVENT)Context, IO_NO_INCREMENT, FALSE);
}

Referenced by PcRequestNewPowerState().