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/*
* WINE XInput device driver
*
* Copyright 2021 Rémi Bernon for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "winioctl.h"
#include "cfgmgr32.h"
#include "ddk/wdm.h"
#include "ddk/hidport.h"
#include "ddk/hidpddi.h"
#include "wine/asm.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(winexinput);
#if defined(__i386__) && !defined(_WIN32)
extern void *WINAPI wrap_fastcall_func1(void *func, const void *a);
__ASM_STDCALL_FUNC(wrap_fastcall_func1, 8,
"popl %ecx\n\t"
"popl %eax\n\t"
"xchgl (%esp),%ecx\n\t"
"jmp *%eax");
#define call_fastcall_func1(func,a) wrap_fastcall_func1(func,a)
#else
#define call_fastcall_func1(func,a) func(a)
#endif
struct device
{
BOOL is_fdo;
BOOL is_gamepad;
BOOL removed;
WCHAR device_id[MAX_DEVICE_ID_LEN];
};
static inline struct device *impl_from_DEVICE_OBJECT(DEVICE_OBJECT *device)
{
return (struct device *)device->DeviceExtension;
}
struct phys_device
{
struct device base;
struct func_device *fdo;
};
struct func_device
{
struct device base;
DEVICE_OBJECT *bus_device;
/* the bogus HID gamepad, as exposed by native XUSB */
DEVICE_OBJECT *gamepad_device;
/* the Wine-specific hidden HID device, used by XInput */
DEVICE_OBJECT *xinput_device;
WCHAR instance_id[MAX_DEVICE_ID_LEN];
/* everything below requires holding the cs */
CRITICAL_SECTION cs;
ULONG report_len;
char *report_buf;
IRP *pending_read;
BOOL pending_is_gamepad;
};
static inline struct func_device *fdo_from_DEVICE_OBJECT(DEVICE_OBJECT *device)
{
struct device *impl = impl_from_DEVICE_OBJECT(device);
if (impl->is_fdo) return CONTAINING_RECORD(impl, struct func_device, base);
else return CONTAINING_RECORD(impl, struct phys_device, base)->fdo;
}
static NTSTATUS WINAPI read_completion(DEVICE_OBJECT *device, IRP *xinput_irp, void *context)
{
IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(xinput_irp);
ULONG offset, read_len = stack->Parameters.DeviceIoControl.OutputBufferLength;
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
char *read_buf = xinput_irp->UserBuffer;
IRP *gamepad_irp = context;
gamepad_irp->IoStatus.Status = xinput_irp->IoStatus.Status;
gamepad_irp->IoStatus.Information = xinput_irp->IoStatus.Information;
if (!xinput_irp->IoStatus.Status)
{
RtlEnterCriticalSection(&fdo->cs);
offset = fdo->report_buf[0] ? 0 : 1;
memcpy(fdo->report_buf + offset, read_buf, read_len);
memcpy(gamepad_irp->UserBuffer, read_buf, read_len);
RtlLeaveCriticalSection(&fdo->cs);
}
IoCompleteRequest(gamepad_irp, IO_NO_INCREMENT);
if (xinput_irp->PendingReturned) IoMarkIrpPending(xinput_irp);
return STATUS_SUCCESS;
}
/* check for a pending read from the other PDO, and complete both at a time.
* if there's none, save irp as pending, the other PDO will complete it.
* if the device is being removed, complete irp with an error. */
static NTSTATUS try_complete_pending_read(DEVICE_OBJECT *device, IRP *irp)
{
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
struct device *impl = impl_from_DEVICE_OBJECT(device);
IRP *pending, *xinput_irp, *gamepad_irp;
BOOL removed, pending_is_gamepad;
RtlEnterCriticalSection(&fdo->cs);
pending_is_gamepad = fdo->pending_is_gamepad;
if ((removed = impl->removed))
pending = NULL;
else if ((pending = fdo->pending_read))
fdo->pending_read = NULL;
else
{
fdo->pending_read = irp;
fdo->pending_is_gamepad = impl->is_gamepad;
IoMarkIrpPending(irp);
}
RtlLeaveCriticalSection(&fdo->cs);
if (removed)
{
irp->IoStatus.Status = STATUS_DELETE_PENDING;
irp->IoStatus.Information = 0;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_DELETE_PENDING;
}
if (!pending) return STATUS_PENDING;
/* only one read at a time per device from hidclass.sys design */
if (pending_is_gamepad == impl->is_gamepad) ERR("multiple read requests!\n");
gamepad_irp = impl->is_gamepad ? irp : pending;
xinput_irp = impl->is_gamepad ? pending : irp;
/* pass xinput irp down, and complete gamepad irp on its way back */
IoCopyCurrentIrpStackLocationToNext(xinput_irp);
IoSetCompletionRoutine(xinput_irp, read_completion, gamepad_irp, TRUE, TRUE, TRUE);
return IoCallDriver(fdo->bus_device, xinput_irp);
}
static NTSTATUS WINAPI gamepad_internal_ioctl(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(irp);
ULONG code = stack->Parameters.DeviceIoControl.IoControlCode;
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
TRACE("device %p, irp %p, code %#x, bus_device %p.\n", device, irp, code, fdo->bus_device);
switch (code)
{
case IOCTL_HID_GET_INPUT_REPORT:
{
HID_XFER_PACKET *packet = (HID_XFER_PACKET *)irp->UserBuffer;
RtlEnterCriticalSection(&fdo->cs);
memcpy(packet->reportBuffer, fdo->report_buf, fdo->report_len);
irp->IoStatus.Information = fdo->report_len;
RtlLeaveCriticalSection(&fdo->cs);
irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
default:
IoSkipCurrentIrpStackLocation(irp);
return IoCallDriver(fdo->bus_device, irp);
}
return STATUS_SUCCESS;
}
static NTSTATUS WINAPI internal_ioctl(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(irp);
ULONG code = stack->Parameters.DeviceIoControl.IoControlCode;
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
struct device *impl = impl_from_DEVICE_OBJECT(device);
if (InterlockedOr(&impl->removed, FALSE))
{
irp->IoStatus.Status = STATUS_DELETE_PENDING;
irp->IoStatus.Information = 0;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_DELETE_PENDING;
}
TRACE("device %p, irp %p, code %#x, bus_device %p.\n", device, irp, code, fdo->bus_device);
if (code == IOCTL_HID_READ_REPORT) return try_complete_pending_read(device, irp);
if (impl->is_gamepad) return gamepad_internal_ioctl(device, irp);
IoSkipCurrentIrpStackLocation(irp);
return IoCallDriver(fdo->bus_device, irp);
}
static WCHAR *query_instance_id(DEVICE_OBJECT *device)
{
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
DWORD size = (wcslen(fdo->instance_id) + 1) * sizeof(WCHAR);
WCHAR *dst;
if ((dst = ExAllocatePool(PagedPool, size)))
memcpy(dst, fdo->instance_id, size);
return dst;
}
static WCHAR *query_device_id(DEVICE_OBJECT *device)
{
struct device *impl = impl_from_DEVICE_OBJECT(device);
DWORD size = (wcslen(impl->device_id) + 1) * sizeof(WCHAR);
WCHAR *dst;
if ((dst = ExAllocatePool(PagedPool, size)))
memcpy(dst, impl->device_id, size);
return dst;
}
static WCHAR *query_hardware_ids(DEVICE_OBJECT *device)
{
struct device *impl = impl_from_DEVICE_OBJECT(device);
DWORD size = (wcslen(impl->device_id) + 1) * sizeof(WCHAR);
WCHAR *dst;
if ((dst = ExAllocatePool(PagedPool, size + sizeof(WCHAR))))
{
memcpy(dst, impl->device_id, size);
dst[size / sizeof(WCHAR)] = 0;
}
return dst;
}
static WCHAR *query_compatible_ids(DEVICE_OBJECT *device)
{
static const WCHAR hid_compat[] = L"WINEBUS\\WINE_COMP_HID";
DWORD size = sizeof(hid_compat);
WCHAR *dst;
if ((dst = ExAllocatePool(PagedPool, size + sizeof(WCHAR))))
{
memcpy(dst, hid_compat, sizeof(hid_compat));
dst[size / sizeof(WCHAR)] = 0;
}
return dst;
}
static NTSTATUS WINAPI pdo_pnp(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(irp);
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
struct device *impl = impl_from_DEVICE_OBJECT(device);
ULONG code = stack->MinorFunction;
NTSTATUS status;
IRP *pending;
TRACE("device %p, irp %p, code %#x, bus_device %p.\n", device, irp, code, fdo->bus_device);
switch (code)
{
case IRP_MN_START_DEVICE:
status = STATUS_SUCCESS;
break;
case IRP_MN_SURPRISE_REMOVAL:
status = STATUS_SUCCESS;
if (InterlockedExchange(&impl->removed, TRUE)) break;
RtlEnterCriticalSection(&fdo->cs);
pending = fdo->pending_read;
fdo->pending_read = NULL;
RtlLeaveCriticalSection(&fdo->cs);
if (pending)
{
pending->IoStatus.Status = STATUS_DELETE_PENDING;
pending->IoStatus.Information = 0;
IoCompleteRequest(pending, IO_NO_INCREMENT);
}
break;
case IRP_MN_REMOVE_DEVICE:
irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest(irp, IO_NO_INCREMENT);
IoDeleteDevice(device);
return STATUS_SUCCESS;
case IRP_MN_QUERY_ID:
{
BUS_QUERY_ID_TYPE type = stack->Parameters.QueryId.IdType;
switch (type)
{
case BusQueryHardwareIDs:
irp->IoStatus.Information = (ULONG_PTR)query_hardware_ids(device);
if (!irp->IoStatus.Information) status = STATUS_NO_MEMORY;
else status = STATUS_SUCCESS;
break;
case BusQueryCompatibleIDs:
irp->IoStatus.Information = (ULONG_PTR)query_compatible_ids(device);
if (!irp->IoStatus.Information) status = STATUS_NO_MEMORY;
else status = STATUS_SUCCESS;
break;
case BusQueryDeviceID:
irp->IoStatus.Information = (ULONG_PTR)query_device_id(device);
if (!irp->IoStatus.Information) status = STATUS_NO_MEMORY;
else status = STATUS_SUCCESS;
break;
case BusQueryInstanceID:
irp->IoStatus.Information = (ULONG_PTR)query_instance_id(device);
if (!irp->IoStatus.Information) status = STATUS_NO_MEMORY;
else status = STATUS_SUCCESS;
break;
default:
FIXME("IRP_MN_QUERY_ID type %u, not implemented!\n", type);
status = irp->IoStatus.Status;
break;
}
break;
}
case IRP_MN_QUERY_CAPABILITIES:
status = STATUS_SUCCESS;
break;
case IRP_MN_QUERY_DEVICE_RELATIONS:
status = irp->IoStatus.Status;
break;
default:
FIXME("code %#x, not implemented!\n", code);
status = irp->IoStatus.Status;
break;
}
irp->IoStatus.Status = status;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return status;
}
static NTSTATUS create_child_pdos(DEVICE_OBJECT *device)
{
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
DEVICE_OBJECT *gamepad_device, *xinput_device;
struct phys_device *pdo;
UNICODE_STRING name_str;
WCHAR *tmp, name[255];
NTSTATUS status;
swprintf(name, ARRAY_SIZE(name), L"\\Device\\WINEXINPUT#%p&%p&0",
device->DriverObject, fdo->bus_device);
RtlInitUnicodeString(&name_str, name);
if ((status = IoCreateDevice(device->DriverObject, sizeof(struct phys_device),
&name_str, 0, 0, FALSE, &gamepad_device)))
{
ERR("failed to create gamepad device, status %#x.\n", status);
return status;
}
swprintf(name, ARRAY_SIZE(name), L"\\Device\\WINEXINPUT#%p&%p&1",
device->DriverObject, fdo->bus_device);
RtlInitUnicodeString(&name_str, name);
if ((status = IoCreateDevice(device->DriverObject, sizeof(struct phys_device),
&name_str, 0, 0, FALSE, &xinput_device)))
{
ERR("failed to create xinput device, status %#x.\n", status);
IoDeleteDevice(gamepad_device);
return status;
}
fdo->gamepad_device = gamepad_device;
pdo = gamepad_device->DeviceExtension;
pdo->fdo = fdo;
pdo->base.is_fdo = FALSE;
pdo->base.is_gamepad = TRUE;
wcscpy(pdo->base.device_id, fdo->base.device_id);
if ((tmp = wcsstr(pdo->base.device_id, L"&MI_"))) memcpy(tmp, L"&IG", 6);
else wcscat(pdo->base.device_id, L"&IG_00");
TRACE("device %p, gamepad device %p.\n", device, gamepad_device);
fdo->xinput_device = xinput_device;
pdo = xinput_device->DeviceExtension;
pdo->fdo = fdo;
pdo->base.is_fdo = FALSE;
pdo->base.is_gamepad = FALSE;
wcscpy(pdo->base.device_id, fdo->base.device_id);
if ((tmp = wcsstr(pdo->base.device_id, L"&MI_"))) memcpy(tmp, L"&XI", 6);
else wcscat(pdo->base.device_id, L"&XI_00");
TRACE("device %p, xinput device %p.\n", device, xinput_device);
IoInvalidateDeviceRelations(fdo->bus_device, BusRelations);
return STATUS_SUCCESS;
}
static NTSTATUS sync_ioctl(DEVICE_OBJECT *device, DWORD code, void *in_buf, DWORD in_len, void *out_buf, DWORD out_len)
{
IO_STATUS_BLOCK io;
KEVENT event;
IRP *irp;
KeInitializeEvent(&event, NotificationEvent, FALSE);
irp = IoBuildDeviceIoControlRequest(code, device, in_buf, in_len, out_buf, out_len, TRUE, &event, &io);
if (IoCallDriver(device, irp) == STATUS_PENDING) KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
return io.Status;
}
static NTSTATUS initialize_device(DEVICE_OBJECT *device)
{
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
ULONG i, report_desc_len, report_count;
PHIDP_REPORT_DESCRIPTOR report_desc;
PHIDP_PREPARSED_DATA preparsed;
HIDP_DEVICE_DESC device_desc;
HIDP_REPORT_IDS *reports;
HID_DESCRIPTOR hid_desc;
NTSTATUS status;
HIDP_CAPS caps;
if ((status = sync_ioctl(fdo->bus_device, IOCTL_HID_GET_DEVICE_DESCRIPTOR, NULL, 0, &hid_desc, sizeof(hid_desc))))
return status;
if (!(report_desc_len = hid_desc.DescriptorList[0].wReportLength)) return STATUS_UNSUCCESSFUL;
if (!(report_desc = malloc(report_desc_len))) return STATUS_NO_MEMORY;
status = sync_ioctl(fdo->bus_device, IOCTL_HID_GET_REPORT_DESCRIPTOR, NULL, 0, report_desc, report_desc_len);
if (!status) status = HidP_GetCollectionDescription(report_desc, report_desc_len, PagedPool, &device_desc);
free(report_desc);
if (status != HIDP_STATUS_SUCCESS) return status;
preparsed = device_desc.CollectionDesc->PreparsedData;
status = HidP_GetCaps(preparsed, &caps);
if (status != HIDP_STATUS_SUCCESS) return status;
reports = device_desc.ReportIDs;
report_count = device_desc.ReportIDsLength;
for (i = 0; i < report_count; ++i) if (!reports[i].ReportID || reports[i].InputLength) break;
if (i == report_count) i = 0; /* no input report?!, just use first ID */
fdo->report_len = caps.InputReportByteLength;
if (!(fdo->report_buf = malloc(fdo->report_len))) return STATUS_NO_MEMORY;
fdo->report_buf[0] = reports[i].ReportID;
HidP_FreeCollectionDescription(&device_desc);
return STATUS_SUCCESS;
}
static NTSTATUS WINAPI set_event_completion(DEVICE_OBJECT *device, IRP *irp, void *context)
{
if (irp->PendingReturned) KeSetEvent((KEVENT *)context, IO_NO_INCREMENT, FALSE);
return STATUS_MORE_PROCESSING_REQUIRED;
}
static NTSTATUS WINAPI fdo_pnp(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(irp);
struct func_device *fdo = fdo_from_DEVICE_OBJECT(device);
ULONG code = stack->MinorFunction;
DEVICE_RELATIONS *devices;
DEVICE_OBJECT *child;
NTSTATUS status;
KEVENT event;
TRACE("device %p, irp %p, code %#x, bus_device %p.\n", device, irp, code, fdo->bus_device);
switch (stack->MinorFunction)
{
case IRP_MN_QUERY_DEVICE_RELATIONS:
if (stack->Parameters.QueryDeviceRelations.Type == BusRelations)
{
if (!(devices = ExAllocatePool(PagedPool, offsetof(DEVICE_RELATIONS, Objects[2]))))
{
irp->IoStatus.Status = STATUS_NO_MEMORY;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_NO_MEMORY;
}
devices->Count = 0;
if ((child = fdo->xinput_device))
{
devices->Objects[devices->Count] = child;
call_fastcall_func1(ObfReferenceObject, child);
devices->Count++;
}
if ((child = fdo->gamepad_device))
{
devices->Objects[devices->Count] = child;
call_fastcall_func1(ObfReferenceObject, child);
devices->Count++;
}
irp->IoStatus.Information = (ULONG_PTR)devices;
irp->IoStatus.Status = STATUS_SUCCESS;
}
IoSkipCurrentIrpStackLocation(irp);
return IoCallDriver(fdo->bus_device, irp);
case IRP_MN_START_DEVICE:
KeInitializeEvent(&event, NotificationEvent, FALSE);
IoCopyCurrentIrpStackLocationToNext(irp);
IoSetCompletionRoutine(irp, set_event_completion, &event, TRUE, TRUE, TRUE);
status = IoCallDriver(fdo->bus_device, irp);
if (status == STATUS_PENDING)
{
KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
status = irp->IoStatus.Status;
}
if (!status) status = initialize_device(device);
if (!status) status = create_child_pdos(device);
if (status) irp->IoStatus.Status = status;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return status;
case IRP_MN_REMOVE_DEVICE:
IoSkipCurrentIrpStackLocation(irp);
status = IoCallDriver(fdo->bus_device, irp);
IoDetachDevice(fdo->bus_device);
RtlDeleteCriticalSection(&fdo->cs);
free(fdo->report_buf);
IoDeleteDevice(device);
return status;
default:
IoSkipCurrentIrpStackLocation(irp);
return IoCallDriver(fdo->bus_device, irp);
}
return STATUS_SUCCESS;
}
static NTSTATUS WINAPI driver_pnp(DEVICE_OBJECT *device, IRP *irp)
{
struct device *impl = impl_from_DEVICE_OBJECT(device);
if (impl->is_fdo) return fdo_pnp(device, irp);
return pdo_pnp(device, irp);
}
static NTSTATUS get_device_id(DEVICE_OBJECT *device, BUS_QUERY_ID_TYPE type, WCHAR *id)
{
IO_STACK_LOCATION *stack;
IO_STATUS_BLOCK io;
KEVENT event;
IRP *irp;
KeInitializeEvent(&event, NotificationEvent, FALSE);
irp = IoBuildSynchronousFsdRequest(IRP_MJ_PNP, device, NULL, 0, NULL, &event, &io);
if (irp == NULL) return STATUS_NO_MEMORY;
stack = IoGetNextIrpStackLocation(irp);
stack->MinorFunction = IRP_MN_QUERY_ID;
stack->Parameters.QueryId.IdType = type;
if (IoCallDriver(device, irp) == STATUS_PENDING)
KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
wcscpy(id, (WCHAR *)io.Information);
ExFreePool((WCHAR *)io.Information);
return io.Status;
}
static NTSTATUS WINAPI add_device(DRIVER_OBJECT *driver, DEVICE_OBJECT *bus_device)
{
WCHAR bus_id[MAX_DEVICE_ID_LEN], *device_id, instance_id[MAX_DEVICE_ID_LEN];
struct func_device *fdo;
DEVICE_OBJECT *device;
NTSTATUS status;
TRACE("driver %p, bus_device %p.\n", driver, bus_device);
if ((status = get_device_id(bus_device, BusQueryDeviceID, bus_id)))
{
ERR("failed to get bus device id, status %#x.\n", status);
return status;
}
if ((device_id = wcsrchr(bus_id, '\\'))) *device_id++ = 0;
else
{
ERR("unexpected device id %s\n", debugstr_w(bus_id));
return STATUS_UNSUCCESSFUL;
}
if ((status = get_device_id(bus_device, BusQueryInstanceID, instance_id)))
{
ERR("failed to get bus device instance id, status %#x.\n", status);
return status;
}
if ((status = IoCreateDevice(driver, sizeof(struct func_device), NULL,
FILE_DEVICE_BUS_EXTENDER, 0, FALSE, &device)))
{
ERR("failed to create bus FDO, status %#x.\n", status);
return status;
}
fdo = device->DeviceExtension;
fdo->base.is_fdo = TRUE;
swprintf(fdo->base.device_id, MAX_DEVICE_ID_LEN, L"WINEXINPUT\\%s", device_id);
fdo->bus_device = bus_device;
wcscpy(fdo->instance_id, instance_id);
RtlInitializeCriticalSection(&fdo->cs);
fdo->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": func_device.cs");
TRACE("device %p, bus_id %s, device_id %s, instance_id %s.\n", device, debugstr_w(bus_id),
debugstr_w(fdo->base.device_id), debugstr_w(fdo->instance_id));
IoAttachDeviceToDeviceStack(device, bus_device);
device->Flags &= ~DO_DEVICE_INITIALIZING;
return STATUS_SUCCESS;
}
static void WINAPI driver_unload(DRIVER_OBJECT *driver)
{
TRACE("driver %p\n", driver);
}
NTSTATUS WINAPI DriverEntry(DRIVER_OBJECT *driver, UNICODE_STRING *path)
{
TRACE("driver %p, path %s.\n", driver, debugstr_w(path->Buffer));
driver->MajorFunction[IRP_MJ_INTERNAL_DEVICE_CONTROL] = internal_ioctl;
driver->MajorFunction[IRP_MJ_PNP] = driver_pnp;
driver->DriverExtension->AddDevice = add_device;
driver->DriverUnload = driver_unload;
return STATUS_SUCCESS;
}
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