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190 lines
3.6 KiB
190 lines
3.6 KiB
/*++
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Copyright (c) 1991-1998 Microsoft Corporation
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Module Name:
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memcard.c
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Abstract:
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Author:
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Neil Sandlin (neilsa) 26-Apr-99
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Environment:
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Kernel mode only.
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--*/
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#include "pch.h"
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//
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// Internal References
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//
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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 RegistryPath
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);
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VOID
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MemCardUnload(
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IN PDRIVER_OBJECT DriverObject
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);
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NTSTATUS
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MemCardCreateClose(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(INIT,DriverEntry)
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#pragma alloc_text(PAGE,MemCardCreateClose)
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#endif
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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 RegistryPath
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)
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/*++
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Routine Description:
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This routine is the driver's entry point, called by the I/O system
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to load the driver. The driver's entry points are initialized and
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a mutex to control paging is initialized.
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In DBG mode, this routine also examines the registry for special
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debug parameters.
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Arguments:
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DriverObject - a pointer to the object that represents this device
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driver.
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RegistryPath - a pointer to this driver's key in the Services tree.
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Return Value:
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STATUS_SUCCESS unless we can't allocate a mutex.
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--*/
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{
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NTSTATUS ntStatus = STATUS_SUCCESS;
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MemCardDump(MEMCARDSHOW, ("MemCard: DriverEntry\n") );
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//
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// Initialize the driver object with this driver's entry points.
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//
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DriverObject->MajorFunction[IRP_MJ_CREATE] = MemCardCreateClose;
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = MemCardCreateClose;
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DriverObject->MajorFunction[IRP_MJ_READ] = MemCardIrpReadWrite;
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DriverObject->MajorFunction[IRP_MJ_WRITE] = MemCardIrpReadWrite;
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DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = MemCardDeviceControl;
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DriverObject->MajorFunction[IRP_MJ_PNP] = MemCardPnp;
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DriverObject->MajorFunction[IRP_MJ_POWER] = MemCardPower;
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DriverObject->DriverUnload = MemCardUnload;
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DriverObject->DriverExtension->AddDevice = MemCardAddDevice;
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return ntStatus;
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}
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VOID
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MemCardUnload(
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IN PDRIVER_OBJECT DriverObject
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)
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/*++
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Routine Description:
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Unload the driver from the system. The paging mutex is freed before
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final unload.
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Arguments:
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DriverObject - a pointer to the object that represents this device
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driver.
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Return Value:
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none
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--*/
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{
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MemCardDump( MEMCARDSHOW, ("MemCardUnload:\n"));
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//
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// The device object(s) should all be gone by now.
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//
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ASSERT( DriverObject->DeviceObject == NULL );
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return;
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}
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NTSTATUS
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MemCardCreateClose(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine is called only rarely by the I/O system; it's mainly
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for layered drivers to call. All it does is complete the IRP
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successfully.
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Arguments:
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DeviceObject - a pointer to the object that represents the device
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that I/O is to be done on.
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Irp - a pointer to the I/O Request Packet for this request.
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Return Value:
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Always returns STATUS_SUCCESS, since this is a null operation.
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--*/
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{
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UNREFERENCED_PARAMETER( DeviceObject );
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MemCardDump(
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MEMCARDSHOW,
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("MemCardCreateClose...\n")
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);
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//
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// Null operation. Do not give an I/O boost since
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// no I/O was actually done. IoStatus.Information should be
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// FILE_OPENED for an open; it's undefined for a close.
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//
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Irp->IoStatus.Status = STATUS_SUCCESS;
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Irp->IoStatus.Information = FILE_OPENED;
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IoCompleteRequest( Irp, IO_NO_INCREMENT );
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return STATUS_SUCCESS;
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}
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