powerstatemachinekm.cpp

Go to the documentation of this file.

/*++
Copyright (c) Microsoft. All rights reserved.
 
Module Name:
 
    PowerStateMachineKm.cpp
 
Abstract:
 
    This module implements the Power state machine for the driver framework.
    This code was split out from FxPkgPnp.cpp.
 
Author:
 
 
 
 
Environment:
 
    Kernel mode only
 
Revision History:
 
--*/
 
#include "../pnppriv.hpp"
 
extern "C" {
#if defined(EVENT_TRACING)
#include "PowerStateMachineKm.tmh"
#endif
}
 
_Must_inspect_result_
BOOLEAN
FxPkgPnp::PowerDmaPowerUp(
    VOID
    )
/*++
 
Routine Description:
    Calls FxDmaEnabler::PowerUp on all registered FxDmaEnabler objects.  As soon
    as a PowerUp call fails, we stop iterating over the list.
 
Arguments:
    None
 
Return Value:
    TRUE if PowerUp succeeded on all enablers, FALSE otherwise
 
  --*/
 
{
    // FxTransactionedEntry* ple;
    // NTSTATUS status;
    BOOLEAN result;
 
    result = TRUE;
 
    //
    // Power up each dma enabler
    //
    // if (m_DmaEnablerList != NULL) {
    //     m_DmaEnablerList->LockForEnum(GetDriverGlobals());
 
    //     ple = NULL;
    //     while ((ple = m_DmaEnablerList->GetNextEntry(ple)) != NULL) {
    //         status = ((FxDmaEnabler*) ple->GetTransactionedObject())->PowerUp();
 
    //         if (!NT_SUCCESS(status)) {
    //             result = FALSE;
    //             break;
    //         }
    //     }
 
    //     m_DmaEnablerList->UnlockFromEnum(GetDriverGlobals());
    // }
 
    return result;
}
 
BOOLEAN
FxPkgPnp::PowerDmaPowerDown(
    VOID
    )
/*++
 
Routine Description:
    Calls FxDmaEnabler::PowerDown on all registered FxDmaEnabler objects.  All
    errors are accumulated, all enablers will be PowerDown'ed.
 
Arguments:
    None
 
Return Value:
    TRUE if PowerDown succeeded on all enablers, FALSE otherwise
 
  --*/
{
    // FxTransactionedEntry* ple;
    // NTSTATUS status;
    BOOLEAN result;
 
    result = TRUE;
 
    //
    // Power up each dma enabler
    //
    // if (m_DmaEnablerList != NULL) {
    //     m_DmaEnablerList->LockForEnum(GetDriverGlobals());
 
    //     ple = NULL;
    //     while ((ple = m_DmaEnablerList->GetNextEntry(ple)) != NULL) {
    //         status = ((FxDmaEnabler*) ple->GetTransactionedObject())->PowerDown();
 
    //         if (!NT_SUCCESS(status)) {
    //             //
    //             // We do not break out of the loop on power down failure.  We will
    //             // continue to power down each channel regardless of the previous
    //             // channel's power down status.
    //             //
    //             result = FALSE;
    //         }
    //     }
 
    //     m_DmaEnablerList->UnlockFromEnum(GetDriverGlobals());
    // }
 
    return result;
}
 
VOID
FxPkgPnp::_PowerSetSystemWakeSource(
    __in FxIrp* Irp
    )
/*++
 
Routine Description:
    Set source of wake if OS supports this.
 
Arguments:
    Irp
 
Return Value:
    None
 
  --*/
{
    PoSetSystemWake(Irp->GetIrp());
}