BOOLEAN
NICEvtInterruptIsr(
IN WDFINTERRUPT Interrupt,
IN ULONG MessageID
)
/*++
Routine Description:
Interrupt handler for the device.
Arguments:
Interupt - Address of the framework interrupt object
MessageID -
Return Value:
TRUE if our device is interrupting, FALSE otherwise.
--*/
{
BOOLEAN InterruptRecognized = FALSE;
PFDO_DATA FdoData = NULL;
USHORT IntStatus;
UNREFERENCED_PARAMETER( MessageID );
TraceEvents(TRACE_LEVEL_VERBOSE, DBG_INTERRUPT, "--> NICEvtInterruptIsr\n");
FdoData = FdoGetData(WdfInterruptGetDevice(Interrupt));
//
// We process the interrupt if it's not disabled and it's active
//
if (!NIC_INTERRUPT_DISABLED(FdoData) && NIC_INTERRUPT_ACTIVE(FdoData))
{
InterruptRecognized = TRUE;
//
// Disable the interrupt (will be re-enabled in NICEvtInterruptDpc
//
NICDisableInterrupt(FdoData);
//
// Acknowledge the interrupt(s) and get the interrupt status
//
NIC_ACK_INTERRUPT(FdoData, IntStatus);
WdfInterruptQueueDpcForIsr( Interrupt );
}
TraceEvents(TRACE_LEVEL_VERBOSE, DBG_INTERRUPT, "<-- NICEvtInterruptIsr\n");
return InterruptRecognized;
}
BOOLEAN
MPSetPowerLowPrivate(
PVOID Context
)
/*++
Routine Description:
The section follows the steps mentioned in
Section C.2.6.2 of the Reference Manual.
Arguments:
Adapter Pointer to our adapter
Return Value:
--*/
{
CSR_FILTER_STRUC Filter;
USHORT IntStatus;
MP_PMCSR PMCSR = {0};
ULONG ulResult;
PFDO_DATA FdoData = Context;
DebugPrint(TRACE, DBG_POWER, "-->MPSetPowerLowPrivate\n");
RtlZeroMemory (&Filter, sizeof (Filter));
do
{
//
// Before issue the command to low power state, we should disable the
// interrup and ack all the pending interrupts, then set the adapter's power to
// low state.
//
NICDisableInterrupt(FdoData);
NIC_ACK_INTERRUPT(FdoData, IntStatus);
//
// If the driver should wake up the machine
//
if (FdoData->AllowWakeArming)
{
//
// Send the WakeUp Patter to the nic
MPIssueScbPoMgmtCommand(FdoData, &Filter, TRUE);
//
// Section C.2.6.2 - The driver needs to wait for the CU to idle
// The above function already waits for the CU to idle
//
ASSERT ((FdoData->CSRAddress->ScbStatus & SCB_CUS_MASK) == SCB_CUS_IDLE);
}
else
{
ulResult = FdoData->BusInterface.GetBusData(
FdoData->BusInterface.Context,
PCI_WHICHSPACE_CONFIG,
(PVOID)&PMCSR,
FIELD_OFFSET(MP_PM_PCI_SPACE, PMCSR),
sizeof(PMCSR));
if(ulResult != sizeof(PMCSR)){
ASSERT(ulResult == sizeof(PMCSR));
DebugPrint(ERROR, DBG_POWER, "GetBusData for PMCSR failed\n");
return FALSE;
}
if (PMCSR.PME_En == 1)
{
//
// PME is enabled. Clear the PME_En bit.
// So that it is not asserted
//
MpClearPME_En (FdoData,PMCSR);
}
//
// Set the driver to lower power state by OS
//
}
} while (FALSE);
DebugPrint(TRACE, DBG_POWER, "<--MPSetPowerLowPrivate\n");
return TRUE;
}