pci.h

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#ifndef _PCI_PCH_
#define _PCI_PCH_

#include <ntifs.h>

#define TAG_PCI '0ICP'

typedef struct _PCI_DEVICE
{
    // Entry on device list
    LIST_ENTRY ListEntry;
    // Physical Device Object of device
    PDEVICE_OBJECT Pdo;
    // PCI bus number
    ULONG BusNumber;
    // PCI slot number
    PCI_SLOT_NUMBER SlotNumber;
    // PCI configuration data
    PCI_COMMON_CONFIG PciConfig;
    // Enable memory space
    BOOLEAN EnableMemorySpace;
    // Enable I/O space
    BOOLEAN EnableIoSpace;
    // Enable bus master
    BOOLEAN EnableBusMaster;
} PCI_DEVICE, *PPCI_DEVICE;


typedef enum
{
    dsStopped,
    dsStarted,
    dsPaused,
    dsRemoved,
    dsSurpriseRemoved
} PCI_DEVICE_STATE;


typedef struct _COMMON_DEVICE_EXTENSION
{
    // Pointer to device object, this device extension is associated with
    PDEVICE_OBJECT DeviceObject;
    // Wether this device extension is for an FDO or PDO
    BOOLEAN IsFDO;
    // Wether the device is removed
    BOOLEAN Removed;
    // Current device power state for the device
    DEVICE_POWER_STATE DevicePowerState;
} COMMON_DEVICE_EXTENSION, *PCOMMON_DEVICE_EXTENSION;

/* Physical Device Object device extension for a child device */
typedef struct _PDO_DEVICE_EXTENSION
{
    // Common device data
    COMMON_DEVICE_EXTENSION Common;
    // Functional device object
    PDEVICE_OBJECT Fdo;
    // Pointer to PCI Device informations
    PPCI_DEVICE PciDevice;
    // Device ID
    UNICODE_STRING DeviceID;
    // Instance ID
    UNICODE_STRING InstanceID;
    // Hardware IDs
    UNICODE_STRING HardwareIDs;
    // Compatible IDs
    UNICODE_STRING CompatibleIDs;
    // Textual description of device
    UNICODE_STRING DeviceDescription;
    // Textual description of device location
    UNICODE_STRING DeviceLocation;
    // Number of interfaces references
    LONG References;
} PDO_DEVICE_EXTENSION, *PPDO_DEVICE_EXTENSION;

/* Functional Device Object device extension for the PCI driver device object */
typedef struct _FDO_DEVICE_EXTENSION
{
    // Common device data
    COMMON_DEVICE_EXTENSION Common;
    // Entry on device list
    LIST_ENTRY ListEntry;
    // PCI bus number serviced by this FDO
    ULONG BusNumber;
    // Current state of the driver
    PCI_DEVICE_STATE State;
    // Namespace device list
    LIST_ENTRY DeviceListHead;
    // Number of (not removed) devices in device list
    ULONG DeviceListCount;
    // Lock for namespace device list
    KSPIN_LOCK DeviceListLock;
    // Lower device object
    PDEVICE_OBJECT Ldo;
} FDO_DEVICE_EXTENSION, *PFDO_DEVICE_EXTENSION;


/* Driver extension associated with PCI driver */
typedef struct _PCI_DRIVER_EXTENSION
{
    //
    LIST_ENTRY BusListHead;
    // Lock for namespace bus list
    KSPIN_LOCK BusListLock;
} PCI_DRIVER_EXTENSION, *PPCI_DRIVER_EXTENSION;


/* We need a global variable to get the driver extension,
 * because at least InterfacePciDevicePresent has no
 * other way to get it... */
extern PPCI_DRIVER_EXTENSION DriverExtension;

/* fdo.c */

NTSTATUS
FdoPnpControl(
    PDEVICE_OBJECT DeviceObject,
    PIRP Irp);

NTSTATUS
FdoPowerControl(
    PDEVICE_OBJECT DeviceObject,
    PIRP Irp);

/* pci.c */

NTSTATUS
PciCreateDeviceIDString(
    PUNICODE_STRING DeviceID,
    PPCI_DEVICE Device);

NTSTATUS
PciCreateInstanceIDString(
    PUNICODE_STRING InstanceID,
    PPCI_DEVICE Device);

NTSTATUS
PciCreateHardwareIDsString(
    PUNICODE_STRING HardwareIDs,
    PPCI_DEVICE Device);

NTSTATUS
PciCreateCompatibleIDsString(
    PUNICODE_STRING HardwareIDs,
    PPCI_DEVICE Device);

NTSTATUS
PciCreateDeviceDescriptionString(
    PUNICODE_STRING DeviceDescription,
    PPCI_DEVICE Device);

NTSTATUS
PciCreateDeviceLocationString(
    PUNICODE_STRING DeviceLocation,
    PPCI_DEVICE Device);

NTSTATUS
PciDuplicateUnicodeString(
    IN ULONG Flags,
    IN PCUNICODE_STRING SourceString,
    OUT PUNICODE_STRING DestinationString);

/* pdo.c */

NTSTATUS
PdoPnpControl(
    PDEVICE_OBJECT DeviceObject,
    PIRP Irp);

NTSTATUS
PdoPowerControl(
    PDEVICE_OBJECT DeviceObject,
    PIRP Irp);

NTSTATUS
NTAPI
DriverEntry(
    IN PDRIVER_OBJECT DriverObject,
    IN PUNICODE_STRING RegistryPath);

#endif /* _PCI_PCH_ */