771 lines
20 KiB
C
771 lines
20 KiB
C
/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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CmbWmi.c
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Abstract:
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Wmi section for Control Method Battery Miniport Driver
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Author:
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Michael Hills
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Environment:
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Kernel mode
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Revision History:
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--*/
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#include "CmBattp.h"
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#include <initguid.h>
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#include <wdmguid.h>
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#include <wmistr.h>
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#include <wmilib.h>
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NTSTATUS
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CmBattSetWmiDataItem(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG DataItemId,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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);
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NTSTATUS
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CmBattSetWmiDataBlock(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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);
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NTSTATUS
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CmBattQueryWmiDataBlock(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG InstanceCount,
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IN OUT PULONG InstanceLengthArray,
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IN ULONG BufferAvail,
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OUT PUCHAR Buffer
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);
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NTSTATUS
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CmBattQueryWmiRegInfo(
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IN PDEVICE_OBJECT DeviceObject,
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OUT ULONG *RegFlags,
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OUT PUNICODE_STRING InstanceName,
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OUT PUNICODE_STRING *RegistryPath,
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OUT PUNICODE_STRING MofResourceName,
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OUT PDEVICE_OBJECT *Pdo
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);
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#if DEBUG
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PCHAR
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WMIMinorFunctionString (
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UCHAR MinorFunction
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);
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#endif
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE,CmBattWmiRegistration)
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#pragma alloc_text(PAGE,CmBattWmiDeRegistration)
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#pragma alloc_text(PAGE,CmBattSystemControl)
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#pragma alloc_text(PAGE,CmBattSetWmiDataItem)
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#pragma alloc_text(PAGE,CmBattSetWmiDataBlock)
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#pragma alloc_text(PAGE,CmBattQueryWmiDataBlock)
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#pragma alloc_text(PAGE,CmBattQueryWmiRegInfo)
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#endif
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//
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// WMI info
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//
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#define MOFRESOURCENAME L"BATTWMI"
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typedef struct _MSPower_DeviceWakeEnable
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{
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//
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BOOLEAN Enable;
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#define MSPower_DeviceWakeEnable_Enable_SIZE sizeof(BOOLEAN)
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#define MSPower_DeviceWakeEnable_Enable_ID 1
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} MSPower_DeviceWakeEnable, *PMSPower_DeviceWakeEnable;
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WMIGUIDREGINFO CmBattWmiGuidList[1] =
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{
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{
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&GUID_POWER_DEVICE_WAKE_ENABLE, 1, 0
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}
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};
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NTSTATUS
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CmBattSystemControl(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine passes the request down the stack
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Arguments:
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DeviceObject - The target
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Irp - The request
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Return Value:
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NTSTATUS
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--*/
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{
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NTSTATUS status = STATUS_NOT_SUPPORTED;
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PCM_BATT CmBatt;
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PIO_STACK_LOCATION stack;
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SYSCTL_IRP_DISPOSITION disposition = IrpForward;
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PAGED_CODE();
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stack = IoGetCurrentIrpStackLocation (Irp);
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CmBattPrint((CMBATT_TRACE), ("CmBatt: SystemControl: %s\n",
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WMIMinorFunctionString(stack->MinorFunction)));
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CmBatt = (PCM_BATT) DeviceObject->DeviceExtension;
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//
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// Aquire remove lock
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//
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InterlockedIncrement (&CmBatt->InUseCount);
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if (CmBatt->WantToRemove == TRUE) {
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if (0 == InterlockedDecrement(&CmBatt->InUseCount)) {
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KeSetEvent (&CmBatt->ReadyToRemove, IO_NO_INCREMENT, FALSE);
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}
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status = STATUS_DEVICE_REMOVED;
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Irp->IoStatus.Status = status;
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IoCompleteRequest (Irp, IO_NO_INCREMENT);
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return status;
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}
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if (CmBatt->Type == CM_BATTERY_TYPE) {
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status = BatteryClassSystemControl(CmBatt->Class,
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&CmBatt->WmiLibContext,
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DeviceObject,
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Irp,
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&disposition);
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} else {
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status = WmiSystemControl(&CmBatt->WmiLibContext,
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DeviceObject,
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Irp,
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&disposition);
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}
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switch(disposition)
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{
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case IrpProcessed:
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{
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//
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// This irp has been processed and may be completed or pending.
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CmBattPrint((CMBATT_TRACE), ("CmBatt: SystemControl: Irp Processed\n"));
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break;
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}
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case IrpNotCompleted:
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{
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//
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// This irp has not been completed, but has been fully processed.
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// we will complete it now
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CmBattPrint((CMBATT_TRACE), ("CmBatt: SystemControl: Irp Not Completed.\n"));
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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break;
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}
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case IrpForward:
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case IrpNotWmi:
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{
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//
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// This irp is either not a WMI irp or is a WMI irp targeted
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// at a device lower in the stack.
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CmBattPrint((CMBATT_TRACE), ("CmBatt: SystemControl: Irp Forward.\n"));
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IoSkipCurrentIrpStackLocation (Irp);
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status = IoCallDriver (CmBatt->LowerDeviceObject, Irp);
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break;
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}
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default:
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{
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//
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// We really should never get here, but if we do just forward....
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ASSERT(FALSE);
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IoSkipCurrentIrpStackLocation (Irp);
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status = IoCallDriver (CmBatt->LowerDeviceObject, Irp);
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break;
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}
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}
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//
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// Release Removal Lock
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//
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if (0 == InterlockedDecrement(&CmBatt->InUseCount)) {
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KeSetEvent (&CmBatt->ReadyToRemove, IO_NO_INCREMENT, FALSE);
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}
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return status;
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}
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NTSTATUS
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CmBattWmiRegistration(
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PCM_BATT CmBatt
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)
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/*++
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Routine Description
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Registers with WMI as a data provider for this
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instance of the device
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--*/
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{
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NTSTATUS status;
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PAGED_CODE();
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CmBatt->WmiLibContext.GuidCount = sizeof (CmBattWmiGuidList) /
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sizeof (WMIGUIDREGINFO);
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ASSERT (1 == CmBatt->WmiLibContext.GuidCount);
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CmBatt->WmiLibContext.GuidList = CmBattWmiGuidList;
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CmBatt->WmiLibContext.QueryWmiRegInfo = CmBattQueryWmiRegInfo;
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CmBatt->WmiLibContext.QueryWmiDataBlock = CmBattQueryWmiDataBlock;
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CmBatt->WmiLibContext.SetWmiDataBlock = CmBattSetWmiDataBlock;
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CmBatt->WmiLibContext.SetWmiDataItem = CmBattSetWmiDataItem;
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CmBatt->WmiLibContext.ExecuteWmiMethod = NULL;
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CmBatt->WmiLibContext.WmiFunctionControl = NULL;
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//
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// Register with WMI
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//
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status = IoWMIRegistrationControl(CmBatt->Fdo,
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WMIREG_ACTION_REGISTER
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);
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return status;
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}
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NTSTATUS
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CmBattWmiDeRegistration(
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PCM_BATT CmBatt
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)
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/*++
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Routine Description
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Inform WMI to remove this DeviceObject from its
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list of providers. This function also
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decrements the reference count of the deviceobject.
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--*/
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{
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PAGED_CODE();
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return IoWMIRegistrationControl(CmBatt->Fdo,
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WMIREG_ACTION_DEREGISTER
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);
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}
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//
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// WMI System Call back functions
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//
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NTSTATUS
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CmBattSetWmiDataItem(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG DataItemId,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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)
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/*++
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Routine Description:
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This routine is a callback into the driver to set for the contents of
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a data block. When the driver has finished filling the data block it
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must call WmiCompleteRequest to complete the irp. The driver can
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return STATUS_PENDING if the irp cannot be completed immediately.
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Arguments:
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DeviceObject is the device whose data block is being queried
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Irp is the Irp that makes this request
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GuidIndex is the index into the list of guids provided when the
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device registered
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InstanceIndex is the index that denotes which instance of the data block
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is being queried.
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DataItemId has the id of the data item being set
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BufferSize has the size of the data item passed
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Buffer has the new values for the data item
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Return Value:
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status
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--*/
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{
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PCM_BATT CmBatt = (PCM_BATT) DeviceObject->DeviceExtension;
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NTSTATUS status;
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HANDLE devInstRegKey;
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UNICODE_STRING valueName;
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ULONG tmp;
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PAGED_CODE();
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CmBattPrint ((CMBATT_TRACE), ("Entered CmBattSetWmiDataItem\n"));
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switch(GuidIndex) {
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case 0:
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if(DataItemId == 0) {
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if (CmBatt->WakeEnabled != *((PBOOLEAN)Buffer)) {
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CmBatt->WakeEnabled = *((PBOOLEAN)Buffer);
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//
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// Save setting in registry
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//
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if ((NT_SUCCESS(IoOpenDeviceRegistryKey (CmBatt->Pdo,
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PLUGPLAY_REGKEY_DEVICE,
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STANDARD_RIGHTS_ALL,
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&devInstRegKey)))) {
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RtlInitUnicodeString (&valueName, WaitWakeEnableKey);
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tmp = (ULONG) CmBatt->WakeEnabled;
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ZwSetValueKey (devInstRegKey,
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&valueName,
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0,
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REG_DWORD,
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&tmp,
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sizeof(tmp));
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ZwClose (devInstRegKey);
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}
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if (CmBatt->WakeEnabled) {
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if (CmBatt->WakeSupportedState.SystemState == PowerSystemUnspecified) {
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CmBatt->WakeEnabled = FALSE;
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status = STATUS_UNSUCCESSFUL;
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} else if (!CmBatt->WaitWakeIrp) {
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status = PoRequestPowerIrp(
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CmBatt->DeviceObject,
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IRP_MN_WAIT_WAKE,
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CmBatt->WakeSupportedState,
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CmBattWaitWakeLoop,
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NULL,
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&(CmBatt->WaitWakeIrp)
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);
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CmBattPrint (CMBATT_PNP, ("CmBattSetWmiDataItem: wait/Wake irp sent.\n"));
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}
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} else {
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if (CmBatt->WaitWakeIrp) {
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status = IoCancelIrp(CmBatt->WaitWakeIrp);
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CmBattPrint (CMBATT_PNP, ("CmBattSetWmiDataItem: Canceled wait/Wake irp.\n"));
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}
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}
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}
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status = STATUS_SUCCESS;
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} else {
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status = STATUS_WMI_READ_ONLY;
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}
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break;
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default:
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status = STATUS_WMI_GUID_NOT_FOUND;
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}
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status = WmiCompleteRequest( DeviceObject,
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Irp,
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status,
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0,
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IO_NO_INCREMENT);
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return status;
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}
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NTSTATUS
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CmBattSetWmiDataBlock(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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)
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/*++
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Routine Description:
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This routine is a callback into the driver to set the contents of
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a data block. When the driver has finished filling the data block it
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must call WmiCompleteRequest to complete the irp. The driver can
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return STATUS_PENDING if the irp cannot be completed immediately.
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Arguments:
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DeviceObject is the device whose data block is being queried
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Irp is the Irp that makes this request
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GuidIndex is the index into the list of guids provided when the
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device registered
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InstanceIndex is the index that denotes which instance of the data block
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is being queried.
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BufferSize has the size of the data block passed
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Buffer has the new values for the data block
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Return Value:
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status
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--*/
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{
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PCM_BATT CmBatt = (PCM_BATT) DeviceObject->DeviceExtension;
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NTSTATUS status;
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HANDLE devInstRegKey;
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UNICODE_STRING valueName;
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ULONG tmp;
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PAGED_CODE();
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CmBattPrint ((CMBATT_TRACE), ("Entered CmBattSetWmiDataBlock\n"));
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switch(GuidIndex) {
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case 0:
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//
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// We will update only writable elements.
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//
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if (CmBatt->WakeEnabled != *((PBOOLEAN)Buffer)) {
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CmBatt->WakeEnabled = *((PBOOLEAN)Buffer);
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//
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// Save setting in registry
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//
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if ((NT_SUCCESS(IoOpenDeviceRegistryKey (CmBatt->Pdo,
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PLUGPLAY_REGKEY_DEVICE,
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STANDARD_RIGHTS_ALL,
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&devInstRegKey)))) {
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RtlInitUnicodeString (&valueName, WaitWakeEnableKey);
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tmp = (ULONG) CmBatt->WakeEnabled;
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ZwSetValueKey (devInstRegKey,
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&valueName,
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0,
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REG_DWORD,
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&tmp,
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sizeof(tmp));
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ZwClose (devInstRegKey);
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}
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if (CmBatt->WakeEnabled) {
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if (CmBatt->WakeSupportedState.SystemState == PowerSystemUnspecified) {
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CmBatt->WakeEnabled = FALSE;
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status = STATUS_UNSUCCESSFUL;
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} else if (!CmBatt->WaitWakeIrp) {
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status = PoRequestPowerIrp(
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CmBatt->DeviceObject,
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IRP_MN_WAIT_WAKE,
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CmBatt->WakeSupportedState,
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CmBattWaitWakeLoop,
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NULL,
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&(CmBatt->WaitWakeIrp)
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);
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CmBattPrint (CMBATT_PNP, ("CmBattSetWmiDataItem: wait/Wake irp sent.\n"));
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}
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} else {
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if (CmBatt->WaitWakeIrp) {
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status = IoCancelIrp(CmBatt->WaitWakeIrp);
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CmBattPrint (CMBATT_PNP, ("CmBattSetWmiDataItem: Canceled wait/Wake irp.\n"));
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}
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}
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}
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status = STATUS_SUCCESS;
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break;
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default:
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status = STATUS_WMI_GUID_NOT_FOUND;
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}
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status = WmiCompleteRequest( DeviceObject,
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Irp,
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status,
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0,
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IO_NO_INCREMENT);
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return(status);
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}
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NTSTATUS
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CmBattQueryWmiDataBlock(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG InstanceCount,
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IN OUT PULONG InstanceLengthArray,
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IN ULONG OutBufferSize,
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OUT PUCHAR Buffer
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)
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/*++
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Routine Description:
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This routine is a callback into the driver to query for the contents of
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a data block. When the driver has finished filling the data block it
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must call WmiCompleteRequest to complete the irp. The driver can
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return STATUS_PENDING if the irp cannot be completed immediately.
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Arguments:
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DeviceObject is the device whose data block is being queried
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Irp is the Irp that makes this request
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GuidIndex is the index into the list of guids provided when the
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device registered
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InstanceIndex is the index that denotes which instance of the data block
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is being queried.
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InstanceCount is the number of instances expected to be returned for
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the data block.
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InstanceLengthArray is a pointer to an array of ULONG that returns the
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lengths of each instance of the data block. If this is NULL then
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there was not enough space in the output buffer to fulfill the request
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so the irp should be completed with the buffer needed.
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BufferAvail on has the maximum size available to write the data
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block.
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Buffer on return is filled with the returned data block
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Return Value:
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status
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--*/
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{
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PCM_BATT CmBatt = (PCM_BATT) DeviceObject->DeviceExtension;
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NTSTATUS status;
|
|
ULONG size = 0;
|
|
|
|
PAGED_CODE();
|
|
|
|
CmBattPrint ((CMBATT_TRACE), ("Entered CmBattQueryWmiDataBlock\n"));
|
|
|
|
//
|
|
// Only ever registers 1 instance per guid
|
|
ASSERT((InstanceIndex == 0) &&
|
|
(InstanceCount == 1));
|
|
|
|
if (CmBatt->Type == CM_BATTERY_TYPE) {
|
|
status = BatteryClassQueryWmiDataBlock(
|
|
CmBatt->Class,
|
|
DeviceObject,
|
|
Irp,
|
|
GuidIndex,
|
|
InstanceLengthArray,
|
|
OutBufferSize,
|
|
Buffer);
|
|
|
|
if (status != STATUS_WMI_GUID_NOT_FOUND) {
|
|
CmBattPrint ((CMBATT_TRACE), ("CmBattQueryWmiDataBlock: Handled by Battery Class.\n"));
|
|
return status;
|
|
}
|
|
}
|
|
|
|
CmBattPrint ((CMBATT_TRACE), ("CmBattQueryWmiDataBlock: Handling.\n"));
|
|
|
|
switch (GuidIndex) {
|
|
case 0:
|
|
|
|
if (CmBatt->WakeSupportedState.SystemState != PowerSystemUnspecified) {
|
|
size = sizeof (BOOLEAN);
|
|
if (OutBufferSize < size ) {
|
|
status = STATUS_BUFFER_TOO_SMALL;
|
|
break;
|
|
}
|
|
|
|
(BOOLEAN) (* Buffer) = CmBatt->WakeEnabled;
|
|
*InstanceLengthArray = size;
|
|
status = STATUS_SUCCESS;
|
|
} else {
|
|
status = STATUS_WMI_GUID_NOT_FOUND;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
status = STATUS_WMI_GUID_NOT_FOUND;
|
|
}
|
|
|
|
status = WmiCompleteRequest( DeviceObject,
|
|
Irp,
|
|
status,
|
|
size,
|
|
IO_NO_INCREMENT);
|
|
|
|
return status;
|
|
}
|
|
|
|
NTSTATUS
|
|
CmBattQueryWmiRegInfo(
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
OUT ULONG *RegFlags,
|
|
OUT PUNICODE_STRING InstanceName,
|
|
OUT PUNICODE_STRING *RegistryPath,
|
|
OUT PUNICODE_STRING MofResourceName,
|
|
OUT PDEVICE_OBJECT *Pdo
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine is a callback into the driver to retrieve the list of
|
|
guids or data blocks that the driver wants to register with WMI. This
|
|
routine may not pend or block. Driver should NOT call
|
|
WmiCompleteRequest.
|
|
|
|
Arguments:
|
|
|
|
DeviceObject is the device whose data block is being queried
|
|
|
|
*RegFlags returns with a set of flags that describe the guids being
|
|
registered for this device. If the device wants enable and disable
|
|
collection callbacks before receiving queries for the registered
|
|
guids then it should return the WMIREG_FLAG_EXPENSIVE flag. Also the
|
|
returned flags may specify WMIREG_FLAG_INSTANCE_PDO in which case
|
|
the instance name is determined from the PDO associated with the
|
|
device object. Note that the PDO must have an associated devnode. If
|
|
WMIREG_FLAG_INSTANCE_PDO is not set then Name must return a unique
|
|
name for the device.
|
|
|
|
InstanceName returns with the instance name for the guids if
|
|
WMIREG_FLAG_INSTANCE_PDO is not set in the returned *RegFlags. The
|
|
caller will call ExFreePool with the buffer returned.
|
|
|
|
*RegistryPath returns with the registry path of the driver
|
|
|
|
*MofResourceName returns with the name of the MOF resource attached to
|
|
the binary file. If the driver does not have a mof resource attached
|
|
then this can be returned as NULL.
|
|
|
|
*Pdo returns with the device object for the PDO associated with this
|
|
device if the WMIREG_FLAG_INSTANCE_PDO flag is returned in
|
|
*RegFlags.
|
|
|
|
Return Value:
|
|
|
|
status
|
|
|
|
--*/
|
|
{
|
|
PCM_BATT CmBatt = DeviceObject->DeviceExtension;
|
|
|
|
PAGED_CODE();
|
|
|
|
CmBattPrint ((CMBATT_TRACE), ("CmBatt: Entered CmBattQueryWmiRegInfo\n"));
|
|
|
|
|
|
*RegFlags = WMIREG_FLAG_INSTANCE_PDO;
|
|
*RegistryPath = &GlobalRegistryPath;
|
|
*Pdo = CmBatt->Pdo;
|
|
// RtlInitUnicodeString(MofResourceName, MOFRESOURCENAME);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
#if DEBUG
|
|
|
|
PCHAR
|
|
WMIMinorFunctionString (
|
|
UCHAR MinorFunction
|
|
)
|
|
{
|
|
switch (MinorFunction)
|
|
{
|
|
case IRP_MN_CHANGE_SINGLE_INSTANCE:
|
|
return "IRP_MN_CHANGE_SINGLE_INSTANCE";
|
|
case IRP_MN_CHANGE_SINGLE_ITEM:
|
|
return "IRP_MN_CHANGE_SINGLE_ITEM";
|
|
case IRP_MN_DISABLE_COLLECTION:
|
|
return "IRP_MN_DISABLE_COLLECTION";
|
|
case IRP_MN_DISABLE_EVENTS:
|
|
return "IRP_MN_DISABLE_EVENTS";
|
|
case IRP_MN_ENABLE_COLLECTION:
|
|
return "IRP_MN_ENABLE_COLLECTION";
|
|
case IRP_MN_ENABLE_EVENTS:
|
|
return "IRP_MN_ENABLE_EVENTS";
|
|
case IRP_MN_EXECUTE_METHOD:
|
|
return "IRP_MN_EXECUTE_METHOD";
|
|
case IRP_MN_QUERY_ALL_DATA:
|
|
return "IRP_MN_QUERY_ALL_DATA";
|
|
case IRP_MN_QUERY_SINGLE_INSTANCE:
|
|
return "IRP_MN_QUERY_SINGLE_INSTANCE";
|
|
case IRP_MN_REGINFO:
|
|
return "IRP_MN_REGINFO";
|
|
default:
|
|
return "IRP_MN_?????";
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
|