144 lines
4.5 KiB
C
144 lines
4.5 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1998 - 1999
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//
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// File: initunld.c
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//
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//--------------------------------------------------------------------------
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//
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// This file contains functions associated with driver initialization and unload.
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//
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#include "pch.h"
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NTSTATUS
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DriverEntry(
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IN PDRIVER_OBJECT DriverObject,
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IN PUNICODE_STRING pRegistryPath
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)
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/*++dvdf2
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Routine Description:
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This routine initializes the ParClass driver. This is the first driver
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routine called after the driver is loaded.
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Arguments:
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DriverObject - points to the ParClass (parallel.sys) driver object
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pRegistryPath - points to the registry path for this driver
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Return Value:
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STATUS_SUCCESS
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--*/
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{
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PAGED_CODE();
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#if DBG
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ParInitDebugLevel(pRegistryPath); // initialize driver debug settings from registry
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//ParDebugLevel = -1;
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#endif
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ParBreak(PAR_BREAK_ON_DRIVER_ENTRY, ("DriverEntry(PDRIVER_OBJECT, PUNICODE_STRING)\n") );
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//
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// initialize driver globals
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//
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//
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// Default timeout when trying to acquire ParPort
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//
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AcquirePortTimeout.QuadPart = -((LONGLONG) 10*1000*500); // 500 ms (timeouts in 100ns units)
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//
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// Save Registry path that we were given for use later for WMI.
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//
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RegistryPath.Buffer = ExAllocatePool( PagedPool, pRegistryPath->MaximumLength + sizeof(UNICODE_NULL) );
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if( NULL == RegistryPath.Buffer ) {
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ParDump2(PARERRORS, ("initunld::DriverEntry - unable to alloc space to hold RegistryPath\n") );
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return STATUS_INSUFFICIENT_RESOURCES;
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} else {
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RtlZeroMemory( RegistryPath.Buffer, pRegistryPath->MaximumLength + sizeof(UNICODE_NULL) );
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RegistryPath.Length = pRegistryPath->Length;
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RegistryPath.MaximumLength = pRegistryPath->MaximumLength;
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RtlMoveMemory( RegistryPath.Buffer, pRegistryPath->Buffer, pRegistryPath->Length );
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}
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//
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// Check for settings under HKLM\SYSTEM\CurrentControlSet\Services\Parallel\Parameters
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//
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ParGetDriverParameterDword( &RegistryPath, (PWSTR)L"SppNoRaiseIrql", &SppNoRaiseIrql );
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ParGetDriverParameterDword( &RegistryPath, (PWSTR)L"DefaultModes", &DefaultModes );
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ParGetDriverParameterDword( &RegistryPath, (PWSTR)L"DumpDevExtTable", &DumpDevExtTable );
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//
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// Dump DEVICE_EXTENSION offsets if requested
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//
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if( DumpDevExtTable ) {
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ParDumpDevExtTable();
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}
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//
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// initialize DriverObject pointers to our dispatch routines
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//
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DriverObject->MajorFunction[IRP_MJ_CREATE] = ParCreateOpen;
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = ParClose;
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DriverObject->MajorFunction[IRP_MJ_CLEANUP] = ParCleanup;
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DriverObject->MajorFunction[IRP_MJ_READ] = ParReadWrite;
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DriverObject->MajorFunction[IRP_MJ_WRITE] = ParReadWrite;
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DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = ParDeviceControl;
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DriverObject->MajorFunction[IRP_MJ_INTERNAL_DEVICE_CONTROL] = ParInternalDeviceControl;
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DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = ParQueryInformationFile;
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DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = ParSetInformationFile;
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DriverObject->MajorFunction[IRP_MJ_PNP] = ParParallelPnp;
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DriverObject->MajorFunction[IRP_MJ_POWER] = ParPower;
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DriverObject->MajorFunction[IRP_MJ_SYSTEM_CONTROL] = ParWmiPdoSystemControlDispatch;
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DriverObject->DriverExtension->AddDevice = ParPnpAddDevice;
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DriverObject->DriverUnload = ParUnload;
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return STATUS_SUCCESS;
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}
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VOID
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ParUnload(
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IN PDRIVER_OBJECT DriverObject
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)
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/*++dvdf2
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Routine Description:
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This routine is called to allow the ParClass driver to do any required
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cleanup prior to the driver being unloaded. This is the last driver
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routine called before the driver is loaded.
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Arguments:
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DriverObject - points to the ParClass driver object
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Notes:
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No ParClass device objects remain at the time that this routine is called.
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Return Value:
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None
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--*/
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{
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UNREFERENCED_PARAMETER( DriverObject );
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PAGED_CODE();
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RtlFreeUnicodeString( &RegistryPath ); // free buffer we allocated in DriverEntry
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ParDump2(PARUNLOAD, ("ParUnload() - Cleanup prior to unload of ParClass driver (parallel.sys)\n") );
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ParBreak(PAR_BREAK_ON_UNLOAD, ("ParUnload(PDRIVER_OBJECT)\n") );
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}
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