写一个wdf驱动程序，能够访问pcie配置空间

好的，下面是一个简单的WDF驱动程序代码，可以访问PCIe配置空间：

#include <ntddk.h>
#include <wdf.h>

DRIVER_INITIALIZE DriverEntry;
EVT_WDF_DRIVER_UNLOAD OnDriverUnload;
EVT_WDF_DRIVER_DEVICE_ADD OnDeviceAdd;
EVT_WDF_DEVICE_CONTEXT_CLEANUP OnDeviceCleanup;

typedef struct _DEVICE_CONTEXT
{
    WDFDEVICE Device;
} DEVICE_CONTEXT, *PDEVICE_CONTEXT;

WDF_DECLARE_CONTEXT_TYPE_WITH_NAME(DEVICE_CONTEXT, GetDeviceContext)

NTSTATUS DriverEntry(_In_ PDRIVER_OBJECT DriverObject, _In_ PUNICODE_STRING RegistryPath)
{
    NTSTATUS status;
    WDF_DRIVER_CONFIG config;

    WDF_DRIVER_CONFIG_INIT(&config, OnDeviceAdd);
    config.EvtDriverUnload = OnDriverUnload;

    status = WdfDriverCreate(DriverObject, RegistryPath, WDF_NO_OBJECT_ATTRIBUTES, &config, WDF_NO_HANDLE);
    if (!NT_SUCCESS(status))
    {
        KdPrint(("WdfDriverCreate failed with status 0x%x\n", status));
        return status;
    }

    return STATUS_SUCCESS;
}

VOID OnDriverUnload(_In_ WDFDRIVER Driver)
{
    UNREFERENCED_PARAMETER(Driver);
    KdPrint(("Driver unloaded\n"));
}

NTSTATUS OnDeviceAdd(_In_ WDFDRIVER Driver, _Inout_ PWDFDEVICE_INIT DeviceInit)
{
    NTSTATUS status;
    WDF_OBJECT_ATTRIBUTES attributes;
    PDEVICE_CONTEXT deviceContext;
    WDFDEVICE device;

    UNREFERENCED_PARAMETER(Driver);

    WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&attributes, DEVICE_CONTEXT);
    status = WdfDeviceCreate(&DeviceInit, &attributes, &device);
    if (!NT_SUCCESS(status))
    {
        KdPrint(("WdfDeviceCreate failed with status 0x%x\n", status));
        return status;
    }

    deviceContext = GetDeviceContext(device);

    // Access PCIe configuration space
    ULONG pciConfigSpaceAddress = 0x80000000; // example address, replace with your own
    ULONG data = 0;

    status = WdfDeviceQueryProperty(device, DevicePropertyPciConfigSpace, sizeof(pciConfigSpaceAddress), &pciConfigSpaceAddress, &data, sizeof(data), NULL);
    if (!NT_SUCCESS(status))
    {
        KdPrint(("WdfDeviceQueryProperty failed with status 0x%x\n", status));
        return status;
    }

    // do something with the data

    return STATUS_SUCCESS;
}

VOID OnDeviceCleanup(_In_ WDFOBJECT Object)
{
    UNREFERENCED_PARAMETER(Object);
    KdPrint(("Device cleanup\n"));
}

这个驱动程序创建一个设备，并在设备创建时访问PCIe配置空间。在 `OnDeviceAdd` 回调函数中，使用 `WdfDeviceQueryProperty` 函数查询设备的PCIe配置空间，获取相应的数据，然后进行处理即可。其中，`DevicePropertyPciConfigSpace` 参数用于指定查询PCIe配置空间的属性，`pciConfigSpaceAddress` 参数用于指定配置空间地址。这里仅作为一个示例，实际应用中需要根据具体情况修改代码。

需要注意的是，在驱动程序中访问PCIe配置空间需要管理员权限，因此必须以管理员身份运行驱动程序。