[WDF] Add Windows Driver Framework files

Takern from Microsoft GitHub repo:
d9c6040fe9

Licensed under MIT

sdk/lib/drivers/wdf/shared/irphandlers/pnp/km/powerstatemachinekm.cpp

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+/*++
+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());
+}
+