driver.h

Programming the Microsoft Windows driver model.2nd 随书光盘。内有很多作者送的实用工具和随书源码。WDM编程

// Declarations for scatgath driver
// Copyright (C) 1999 by Walter Oney
// All rights reserved

#ifndef DRIVER_H
#define DRIVER_H
#include <generic.h>

#define DRIVERNAME "SCATGATH"				// for use in messages
#define LDRIVERNAME L"SCATGATH"
#define MAXTRANSFER PAGE_SIZE				// largest transfer we'll ever attempt
#define MAXSG 16							// maximum # s/g elements for our device

///////////////////////////////////////////////////////////////////////////////
// Device extension structure

typedef struct tagDEVICE_EXTENSION {
	PDEVICE_OBJECT DeviceObject;			// device object this extension belongs to
	PDEVICE_OBJECT LowerDeviceObject;		// next lower driver in same stack
	PDEVICE_OBJECT Pdo;						// the PDO
	IO_REMOVE_LOCK RemoveLock;				// removal control locking structure
	UNICODE_STRING devname;
	PGENERIC_EXTENSION pgx;					// device extension for GENERIC.SYS
	DEVQUEUE dqReadWrite;					// queue for reads and writes
	LONG handles;							// # open handles
	PKINTERRUPT InterruptObject;			// address of interrupt object
	PUCHAR portbase;						// I/O port base address
	ULONG nports;							// number of assigned ports
	PADAPTER_OBJECT AdapterObject;			// DMA adapter object
	ULONG nMapRegisters;					// maximum # mapping registers

	ULONG numxfer;							// # bytes transferred so far
	ULONG nbytes;							// # bytes remaining to transfer
	PSCATTER_GATHER_LIST sglist;			// scatter/gather list for this transfer
	ULONG isg;								// index of 1st s/g element for current stage
	ULONG sgdone;							// # elements processed so far

	BOOLEAN mappedport;						// true if we mapped port addr in StartDevice
	BOOLEAN busy;							// true if device busy with a request
	} DEVICE_EXTENSION, *PDEVICE_EXTENSION;

///////////////////////////////////////////////////////////////////////////////
// Global functions

VOID RemoveDevice(IN PDEVICE_OBJECT fdo);
NTSTATUS CompleteRequest(IN PIRP Irp, IN NTSTATUS status, IN ULONG_PTR info);
NTSTATUS StartDevice(PDEVICE_OBJECT fdo, PCM_PARTIAL_RESOURCE_LIST raw, PCM_PARTIAL_RESOURCE_LIST translated);
VOID StartIo(PDEVICE_OBJECT fdo, PIRP Irp);
VOID StopDevice(PDEVICE_OBJECT fdo, BOOLEAN oktouch = FALSE);
VOID DpcForIsr(PKDPC Dpc, PDEVICE_OBJECT fdo, PIRP junk, PDEVICE_EXTENSION pdx);

// I/O request handlers

NTSTATUS DispatchCreate(PDEVICE_OBJECT fdo, PIRP Irp);
NTSTATUS DispatchClose(PDEVICE_OBJECT fdo, PIRP Irp);
NTSTATUS DispatchReadWrite(PDEVICE_OBJECT fdo, PIRP Irp);
NTSTATUS DispatchCleanup(PDEVICE_OBJECT fdo, PIRP Irp);
NTSTATUS DispatchPower(PDEVICE_OBJECT fdo, PIRP Irp);
NTSTATUS DispatchWmi(PDEVICE_OBJECT fdo, PIRP Irp);
NTSTATUS DispatchPnp(PDEVICE_OBJECT fdo, PIRP Irp);

extern BOOLEAN win98;
extern UNICODE_STRING servkey;

#endif // DRIVER_H