NTSTATUS NTAPI SetDeviceFunctional(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp, IN PDEVICE_EXTENSION DeviceExtension)
{
KIRQL oldIrql;
NTSTATUS ntStatus;
POWER_STATE newState;
PIO_STACK_LOCATION irpStack;
DEVICE_POWER_STATE newDevState, oldDevState;
ntStatus = Irp->IoStatus.Status;
irpStack = IoGetCurrentIrpStackLocation(Irp);
newState = irpStack->Parameters.Power.State;
newDevState = newState.DeviceState;
oldDevState = DeviceExtension->DevPower;
FreeBT_DbgPrint(3, ("FBTUSB: SetDeviceFunctional: Entered\n"));
// update the cached state
DeviceExtension->DevPower = newDevState;
// restore appropriate amount of state to our h/w
// this driver does not implement partial context
// save/restore.
PoSetPowerState(DeviceObject, DevicePowerState, newState);
if(PowerDeviceD0 == newDevState)
{
KeAcquireSpinLock(&DeviceExtension->DevStateLock, &oldIrql);
DeviceExtension->QueueState = AllowRequests;
KeReleaseSpinLock(&DeviceExtension->DevStateLock, oldIrql);
ProcessQueuedRequests(DeviceExtension);
}
PoStartNextPowerIrp(Irp);
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
FreeBT_DbgPrint(3, ("FBTUSB: SetDeviceFunctional::"));
FreeBT_IoDecrement(DeviceExtension);
FreeBT_DbgPrint(3, ("FBTUSB: SetDeviceFunctional: Leaving\n"));
return STATUS_SUCCESS;
}
NTSTATUS
SetDeviceFunctional(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PDEVICE_EXTENSION DeviceExtension
)
/*++
Routine Description:
This routine processes queue of pending irps.
Arguments:
DeviceObject - pointer to device object
Irp - I/O request packet
DeviceExtension - pointer to device extension
Return Value:
NT status value
--*/
{
KIRQL oldIrql;
NTSTATUS ntStatus;
POWER_STATE newState;
PIO_STACK_LOCATION irpStack;
DEVICE_POWER_STATE newDevState,
oldDevState;
//
// initialize variables
//
ntStatus = Irp->IoStatus.Status;
irpStack = IoGetCurrentIrpStackLocation(Irp);
newState = irpStack->Parameters.Power.State;
newDevState = newState.DeviceState;
oldDevState = DeviceExtension->DevPower;
MobiUsb_DbgPrint(3, ("file mobipwr: SetDeviceFunctional - begins\n"));
//
// update the cached state
//
DeviceExtension->DevPower = newDevState;
//
// restore appropriate amount of state to our h/w
// this driver does not implement partial context
// save/restore.
//
PoSetPowerState(DeviceObject, DevicePowerState, newState);
if(PowerDeviceD0 == newDevState) {
//
// empty existing queue of all pending irps.
//
KeAcquireSpinLock(&DeviceExtension->DevStateLock, &oldIrql);
DeviceExtension->QueueState = AllowRequests;
KeReleaseSpinLock(&DeviceExtension->DevStateLock, oldIrql);
ProcessQueuedRequests(DeviceExtension);
}
PoStartNextPowerIrp(Irp);
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
MobiUsb_DbgPrint(3, ("file mobipwr: SetDeviceFunctional::"));
MobiUsb_IoDecrement(DeviceExtension);
MobiUsb_DbgPrint(3, ("file mobipwr: SetDeviceFunctional - ends\n"));
return STATUS_SUCCESS;
}
NTSTATUS NTAPI HandleDeviceSetPower(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
KIRQL oldIrql;
NTSTATUS ntStatus;
POWER_STATE newState;
PIO_STACK_LOCATION irpStack;
PDEVICE_EXTENSION deviceExtension;
DEVICE_POWER_STATE newDevState,
oldDevState;
FreeBT_DbgPrint(3, ("FBTUSB: HandleDeviceSetPower: Entered\n"));
deviceExtension = (PDEVICE_EXTENSION)DeviceObject->DeviceExtension;
irpStack = IoGetCurrentIrpStackLocation(Irp);
oldDevState = deviceExtension->DevPower;
newState = irpStack->Parameters.Power.State;
newDevState = newState.DeviceState;
FreeBT_DbgPrint(3, ("FBTUSB: HandleDeviceSetPower: Set request for device power state D%X\n"
"FBTUSB: HandleDeviceSetPower: Current device power state D%X\n",
newDevState - 1,
deviceExtension->DevPower - 1));
if (newDevState < oldDevState)
{
FreeBT_DbgPrint(3, ("FBTUSB: HandleDeviceSetPower: Adding power to the device\n"));
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine(
Irp,
(PIO_COMPLETION_ROUTINE)FinishDevPoUpIrp,
deviceExtension,
TRUE,
TRUE,
TRUE);
ntStatus = PoCallDriver(deviceExtension->TopOfStackDeviceObject, Irp);
}
else
{
// newDevState >= oldDevState
// hold I/O if transition from D0 -> DX (X = 1, 2, 3)
// if transition from D1 or D2 to deeper sleep states,
// I/O queue is already on hold.
if(PowerDeviceD0 == oldDevState && newDevState > oldDevState)
{
// D0 -> DX transition
FreeBT_DbgPrint(3, ("FBTUSB: HandleDeviceSetPower: Removing power from the device\n"));
ntStatus = HoldIoRequests(DeviceObject, Irp);
if (!NT_SUCCESS(ntStatus))
{
PoStartNextPowerIrp(Irp);
Irp->IoStatus.Status = ntStatus;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
FreeBT_DbgPrint(3, ("FBTUSB: HandleDeviceSetPower::"));
FreeBT_IoDecrement(deviceExtension);
return ntStatus;
}
else
{
goto HandleDeviceSetPower_Exit;
}
}
else if (PowerDeviceD0 == oldDevState && PowerDeviceD0 == newDevState)
{
// D0 -> D0
// unblock the queue which may have been blocked processing
// query irp
FreeBT_DbgPrint(3, ("FBTUSB: HandleDeviceSetPower: A SetD0 request\n"));
KeAcquireSpinLock(&deviceExtension->DevStateLock, &oldIrql);
deviceExtension->QueueState = AllowRequests;
KeReleaseSpinLock(&deviceExtension->DevStateLock, oldIrql);
ProcessQueuedRequests(deviceExtension);
}
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine(
Irp,
(PIO_COMPLETION_ROUTINE) FinishDevPoDnIrp,
deviceExtension,
TRUE,
TRUE,
TRUE);
ntStatus = PoCallDriver(deviceExtension->TopOfStackDeviceObject, Irp);
if(!NT_SUCCESS(ntStatus))
{
FreeBT_DbgPrint(1, ("FBTUSB: HandleDeviceSetPower: Lower drivers failed a power Irp\n"));
}
}
HandleDeviceSetPower_Exit:
FreeBT_DbgPrint(3, ("FBTUSB: HandleDeviceSetPower: Leaving\n"));
return STATUS_PENDING;
}
NTSTATUS
HandleDeviceSetPower(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine services irps of minor type IRP_MN_SET_POWER
for the device power state
Arguments:
DeviceObject - pointer to device object
Irp - I/O request packet sent by the power manager
Return Value:
NT status value
--*/
{
KIRQL oldIrql;
NTSTATUS ntStatus;
POWER_STATE newState;
PIO_STACK_LOCATION irpStack;
PDEVICE_EXTENSION deviceExtension;
DEVICE_POWER_STATE newDevState,
oldDevState;
MobiUsb_DbgPrint(3, ("file mobipwr: HandleDeviceSetPower - begins\n"));
//
// initialize variables
//
deviceExtension = (PDEVICE_EXTENSION)DeviceObject->DeviceExtension;
irpStack = IoGetCurrentIrpStackLocation(Irp);
oldDevState = deviceExtension->DevPower;
newState = irpStack->Parameters.Power.State;
newDevState = newState.DeviceState;
MobiUsb_DbgPrint(3, ("file mobipwr: Set request for device power state D%X\n"
"Current device power state D%X\n",
newDevState - 1,
deviceExtension->DevPower - 1));
if(newDevState < oldDevState) {
//
// adding power
//
MobiUsb_DbgPrint(3, ("file mobipwr: Adding power to the device\n"));
//
// send the power IRP to the next driver in the stack
//
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine(
Irp,
(PIO_COMPLETION_ROUTINE)FinishDevPoUpIrp,
deviceExtension,
TRUE,
TRUE,
TRUE);
ntStatus = PoCallDriver(deviceExtension->TopOfStackDeviceObject, Irp);
}
else {
//
// newDevState >= oldDevState
//
// hold I/O if transition from D0 -> DX (X = 1, 2, 3)
// if transition from D1 or D2 to deeper sleep states,
// I/O queue is already on hold.
//
if(PowerDeviceD0 == oldDevState && newDevState > oldDevState) {
//
// D0 -> DX transition
//
MobiUsb_DbgPrint(3, ("file mobipwr: Removing power from the device\n"));
ntStatus = HoldIoRequests(DeviceObject, Irp);
if(!NT_SUCCESS(ntStatus)) {
PoStartNextPowerIrp(Irp);
Irp->IoStatus.Status = ntStatus;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
MobiUsb_DbgPrint(3, ("file mobipwr: HandleDeviceSetPower::"));
MobiUsb_IoDecrement(deviceExtension);
return ntStatus;
}
else {
goto HandleDeviceSetPower_Exit;
}
}
else if(PowerDeviceD0 == oldDevState && PowerDeviceD0 == newDevState) {
//
// D0 -> D0
// unblock the queue which may have been blocked processing
// query irp
//
MobiUsb_DbgPrint(3, ("file mobipwr: A SetD0 request\n"));
KeAcquireSpinLock(&deviceExtension->DevStateLock, &oldIrql);
deviceExtension->QueueState = AllowRequests;
KeReleaseSpinLock(&deviceExtension->DevStateLock, oldIrql);
ProcessQueuedRequests(deviceExtension);
}
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine(
Irp,
(PIO_COMPLETION_ROUTINE) FinishDevPoDnIrp,
deviceExtension,
TRUE,
TRUE,
TRUE);
ntStatus = PoCallDriver(deviceExtension->TopOfStackDeviceObject, Irp);
if(!NT_SUCCESS(ntStatus)) {
MobiUsb_DbgPrint(1, ("file mobipwr: Lower drivers failed a power Irp\n"));
}
}
HandleDeviceSetPower_Exit:
MobiUsb_DbgPrint(3, ("file mobipwr: HandleDeviceSetPower - ends\n"));
return STATUS_PENDING;
}