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Sweden-Number/dlls/hidclass.sys/pnp.c

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/*
* Human Interface Device class driver
*
* Copyright 2015 Aric Stewart
*
* 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 <unistd.h>
#include <stdarg.h>
#include <stdlib.h>
#include "initguid.h"
#include "hid.h"
#include "devguid.h"
#include "devpkey.h"
#include "ntddmou.h"
#include "ntddkbd.h"
#include "ddk/hidtypes.h"
#include "ddk/wdm.h"
#include "regstr.h"
#include "winuser.h"
#include "wine/debug.h"
#include "wine/asm.h"
#include "wine/list.h"
WINE_DEFAULT_DEBUG_CHANNEL(hid);
DEFINE_DEVPROPKEY(DEVPROPKEY_HID_HANDLE, 0xbc62e415, 0xf4fe, 0x405c, 0x8e, 0xda, 0x63, 0x6f, 0xb5, 0x9f, 0x08, 0x98, 2);
DEFINE_GUID(GUID_DEVINTERFACE_WINEXINPUT, 0x6c53d5fd, 0x6480, 0x440f, 0xb6, 0x18, 0x47, 0x67, 0x50, 0xc5, 0xe1, 0xa6);
#ifdef __ASM_USE_FASTCALL_WRAPPER
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
static struct list minidriver_list = LIST_INIT(minidriver_list);
static minidriver *find_minidriver(DRIVER_OBJECT *driver)
{
minidriver *md;
LIST_FOR_EACH_ENTRY(md, &minidriver_list, minidriver, entry)
{
if (md->minidriver.DriverObject == driver)
return md;
}
return NULL;
}
static NTSTATUS get_device_id(DEVICE_OBJECT *device, BUS_QUERY_ID_TYPE type, WCHAR *id)
{
IO_STACK_LOCATION *irpsp;
IO_STATUS_BLOCK irp_status;
KEVENT event;
IRP *irp;
KeInitializeEvent(&event, NotificationEvent, FALSE);
irp = IoBuildSynchronousFsdRequest(IRP_MJ_PNP, device, NULL, 0, NULL, &event, &irp_status);
if (irp == NULL)
return STATUS_NO_MEMORY;
irpsp = IoGetNextIrpStackLocation(irp);
irpsp->MinorFunction = IRP_MN_QUERY_ID;
irpsp->Parameters.QueryId.IdType = type;
if (IoCallDriver(device, irp) == STATUS_PENDING)
KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
wcscpy(id, (WCHAR *)irp_status.Information);
ExFreePool((WCHAR *)irp_status.Information);
return irp_status.Status;
}
/* user32 reserves 1 & 2 for winemouse and winekeyboard,
* keep this in sync with user_private.h */
#define WINE_MOUSE_HANDLE 1
#define WINE_KEYBOARD_HANDLE 2
static UINT32 alloc_rawinput_handle(void)
{
static LONG counter = WINE_KEYBOARD_HANDLE + 1;
return InterlockedIncrement(&counter);
}
/* make sure bRawData can hold UsagePage and Usage without requiring additional allocation */
C_ASSERT(offsetof(RAWINPUT, data.hid.bRawData[2 * sizeof(USAGE)]) < sizeof(RAWINPUT));
static void send_wm_input_device_change(BASE_DEVICE_EXTENSION *ext, LPARAM param)
{
HIDP_COLLECTION_DESC *desc = ext->u.pdo.device_desc.CollectionDesc;
RAWINPUT rawinput;
INPUT input;
if (!IsEqualGUID( ext->class_guid, &GUID_DEVINTERFACE_HID )) return;
rawinput.header.dwType = RIM_TYPEHID;
rawinput.header.dwSize = offsetof(RAWINPUT, data.hid.bRawData[2 * sizeof(USAGE)]);
rawinput.header.hDevice = ULongToHandle(ext->u.pdo.rawinput_handle);
rawinput.header.wParam = param;
rawinput.data.hid.dwCount = 0;
rawinput.data.hid.dwSizeHid = 0;
((USAGE *)rawinput.data.hid.bRawData)[0] = desc->UsagePage;
((USAGE *)rawinput.data.hid.bRawData)[1] = desc->Usage;
input.type = INPUT_HARDWARE;
input.hi.uMsg = WM_INPUT_DEVICE_CHANGE;
input.hi.wParamH = 0;
input.hi.wParamL = 0;
__wine_send_input(0, &input, &rawinput);
}
static NTSTATUS WINAPI driver_add_device(DRIVER_OBJECT *driver, DEVICE_OBJECT *bus_pdo)
{
WCHAR device_id[MAX_DEVICE_ID_LEN], instance_id[MAX_DEVICE_ID_LEN];
BASE_DEVICE_EXTENSION *ext;
BOOL is_xinput_class;
DEVICE_OBJECT *fdo;
NTSTATUS status;
minidriver *minidriver;
if ((status = get_device_id(bus_pdo, BusQueryDeviceID, device_id)))
{
ERR( "Failed to get PDO device id, status %#lx.\n", status );
return status;
}
if ((status = get_device_id(bus_pdo, BusQueryInstanceID, instance_id)))
{
ERR( "Failed to get PDO instance id, status %#lx.\n", status );
return status;
}
TRACE("Adding device to PDO %p, id %s\\%s.\n", bus_pdo, debugstr_w(device_id), debugstr_w(instance_id));
minidriver = find_minidriver(driver);
if ((status = IoCreateDevice(driver, sizeof(*ext) + minidriver->minidriver.DeviceExtensionSize,
NULL, FILE_DEVICE_BUS_EXTENDER, 0, FALSE, &fdo)))
{
ERR( "Failed to create bus FDO, status %#lx.\n", status );
return status;
}
ext = fdo->DeviceExtension;
ext->is_fdo = TRUE;
ext->u.fdo.hid_ext.MiniDeviceExtension = ext + 1;
ext->u.fdo.hid_ext.PhysicalDeviceObject = bus_pdo;
ext->u.fdo.hid_ext.NextDeviceObject = bus_pdo;
swprintf(ext->device_id, ARRAY_SIZE(ext->device_id), L"HID\\%s", wcsrchr(device_id, '\\') + 1);
wcscpy(ext->instance_id, instance_id);
is_xinput_class = !wcsncmp(device_id, L"WINEXINPUT\\", 7) && wcsstr(device_id, L"&XI_") != NULL;
if (is_xinput_class) ext->class_guid = &GUID_DEVINTERFACE_WINEXINPUT;
else ext->class_guid = &GUID_DEVINTERFACE_HID;
status = minidriver->AddDevice(minidriver->minidriver.DriverObject, fdo);
if (status != STATUS_SUCCESS)
{
ERR( "Minidriver AddDevice failed (%lx)\n", status );
IoDeleteDevice(fdo);
return status;
}
IoAttachDeviceToDeviceStack(fdo, bus_pdo);
fdo->Flags &= ~DO_DEVICE_INITIALIZING;
return STATUS_SUCCESS;
}
static void create_child(minidriver *minidriver, DEVICE_OBJECT *fdo)
{
BASE_DEVICE_EXTENSION *fdo_ext = fdo->DeviceExtension, *pdo_ext;
HID_DEVICE_ATTRIBUTES attr = {0};
HID_DESCRIPTOR descriptor = {0};
HIDP_COLLECTION_DESC *desc;
DEVICE_OBJECT *child_pdo;
BYTE *reportDescriptor;
UNICODE_STRING string;
WCHAR pdo_name[255];
IO_STATUS_BLOCK io;
USAGE page, usage;
NTSTATUS status;
INT i;
call_minidriver( IOCTL_HID_GET_DEVICE_ATTRIBUTES, fdo, NULL, 0, &attr, sizeof(attr), &io );
if (io.Status != STATUS_SUCCESS)
{
ERR( "Minidriver failed to get attributes, status %#lx.\n", io.Status );
return;
}
swprintf(pdo_name, ARRAY_SIZE(pdo_name), L"\\Device\\HID#%p&%p", fdo->DriverObject,
fdo_ext->u.fdo.hid_ext.PhysicalDeviceObject);
RtlInitUnicodeString(&string, pdo_name);
if ((status = IoCreateDevice(fdo->DriverObject, sizeof(*pdo_ext), &string, 0, 0, FALSE, &child_pdo)))
{
ERR( "Failed to create child PDO, status %#lx.\n", io.Status );
return;
}
fdo_ext->u.fdo.child_pdo = child_pdo;
pdo_ext = child_pdo->DeviceExtension;
pdo_ext->u.pdo.parent_fdo = fdo;
list_init( &pdo_ext->u.pdo.queues );
KeInitializeSpinLock( &pdo_ext->u.pdo.queues_lock );
wcscpy(pdo_ext->device_id, fdo_ext->device_id);
wcscpy(pdo_ext->instance_id, fdo_ext->instance_id);
pdo_ext->class_guid = fdo_ext->class_guid;
pdo_ext->u.pdo.information.VendorID = attr.VendorID;
pdo_ext->u.pdo.information.ProductID = attr.ProductID;
pdo_ext->u.pdo.information.VersionNumber = attr.VersionNumber;
pdo_ext->u.pdo.information.Polled = minidriver->minidriver.DevicesArePolled;
call_minidriver( IOCTL_HID_GET_DEVICE_DESCRIPTOR, fdo, NULL, 0, &descriptor, sizeof(descriptor), &io );
if (io.Status != STATUS_SUCCESS)
{
ERR( "Cannot get Device Descriptor, status %#lx\n", status );
IoDeleteDevice(child_pdo);
return;
}
for (i = 0; i < descriptor.bNumDescriptors; i++)
if (descriptor.DescriptorList[i].bReportType == HID_REPORT_DESCRIPTOR_TYPE)
break;
if (i >= descriptor.bNumDescriptors)
{
ERR("No Report Descriptor found in reply\n");
IoDeleteDevice(child_pdo);
return;
}
reportDescriptor = malloc(descriptor.DescriptorList[i].wReportLength);
call_minidriver( IOCTL_HID_GET_REPORT_DESCRIPTOR, fdo, NULL, 0, reportDescriptor,
descriptor.DescriptorList[i].wReportLength, &io );
if (io.Status != STATUS_SUCCESS)
{
ERR( "Cannot get Report Descriptor, status %#lx\n", status );
free(reportDescriptor);
IoDeleteDevice(child_pdo);
return;
}
io.Status = HidP_GetCollectionDescription( reportDescriptor, descriptor.DescriptorList[i].wReportLength,
PagedPool, &pdo_ext->u.pdo.device_desc );
free(reportDescriptor);
if (io.Status != HIDP_STATUS_SUCCESS)
{
ERR("Cannot parse Report Descriptor\n");
IoDeleteDevice(child_pdo);
return;
}
desc = pdo_ext->u.pdo.device_desc.CollectionDesc;
pdo_ext->u.pdo.information.DescriptorSize = desc->PreparsedDataLength;
page = desc->UsagePage;
usage = desc->Usage;
if (page == HID_USAGE_PAGE_GENERIC && usage == HID_USAGE_GENERIC_MOUSE)
pdo_ext->u.pdo.rawinput_handle = WINE_MOUSE_HANDLE;
else if (page == HID_USAGE_PAGE_GENERIC && usage == HID_USAGE_GENERIC_KEYBOARD)
pdo_ext->u.pdo.rawinput_handle = WINE_KEYBOARD_HANDLE;
else
pdo_ext->u.pdo.rawinput_handle = alloc_rawinput_handle();
IoInvalidateDeviceRelations(fdo_ext->u.fdo.hid_ext.PhysicalDeviceObject, BusRelations);
if ((status = IoSetDevicePropertyData(child_pdo, &DEVPROPKEY_HID_HANDLE, LOCALE_NEUTRAL,
PLUGPLAY_PROPERTY_PERSISTENT, DEVPROP_TYPE_UINT32,
sizeof(pdo_ext->u.pdo.rawinput_handle), &pdo_ext->u.pdo.rawinput_handle)))
{
ERR( "Failed to set device handle property, status %#lx\n", status );
IoDeleteDevice(child_pdo);
return;
}
pdo_ext->u.pdo.poll_interval = DEFAULT_POLL_INTERVAL;
HID_StartDeviceThread(child_pdo);
send_wm_input_device_change(pdo_ext, GIDC_ARRIVAL);
}
static NTSTATUS fdo_pnp(DEVICE_OBJECT *device, IRP *irp)
{
minidriver *minidriver = find_minidriver(device->DriverObject);
IO_STACK_LOCATION *stack = IoGetCurrentIrpStackLocation(irp);
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
TRACE("irp %p, minor function %#x.\n", irp, stack->MinorFunction);
switch (stack->MinorFunction)
{
case IRP_MN_QUERY_DEVICE_RELATIONS:
{
DEVICE_RELATIONS *devices;
DEVICE_OBJECT *child;
if (stack->Parameters.QueryDeviceRelations.Type != BusRelations)
return minidriver->PNPDispatch(device, irp);
if (!(devices = ExAllocatePool(PagedPool, offsetof(DEVICE_RELATIONS, Objects[1]))))
{
irp->IoStatus.Status = STATUS_NO_MEMORY;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_NO_MEMORY;
}
if ((child = ext->u.fdo.child_pdo))
{
devices->Objects[0] = ext->u.fdo.child_pdo;
call_fastcall_func1(ObfReferenceObject, ext->u.fdo.child_pdo);
devices->Count = 1;
}
else
{
devices->Count = 0;
}
irp->IoStatus.Information = (ULONG_PTR)devices;
irp->IoStatus.Status = STATUS_SUCCESS;
IoSkipCurrentIrpStackLocation(irp);
return IoCallDriver(ext->u.fdo.hid_ext.NextDeviceObject, irp);
}
case IRP_MN_START_DEVICE:
{
NTSTATUS ret;
if ((ret = minidriver->PNPDispatch(device, irp)))
return ret;
create_child(minidriver, device);
return STATUS_SUCCESS;
}
case IRP_MN_REMOVE_DEVICE:
{
NTSTATUS ret;
ret = minidriver->PNPDispatch(device, irp);
IoDetachDevice(ext->u.fdo.hid_ext.NextDeviceObject);
IoDeleteDevice(device);
return ret;
}
default:
return minidriver->PNPDispatch(device, irp);
}
}
static NTSTATUS pdo_pnp(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation(irp);
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
HIDP_COLLECTION_DESC *desc = ext->u.pdo.device_desc.CollectionDesc;
NTSTATUS status = irp->IoStatus.Status;
struct hid_queue *queue, *next;
KIRQL irql;
TRACE("irp %p, minor function %#x.\n", irp, irpsp->MinorFunction);
switch(irpsp->MinorFunction)
{
case IRP_MN_QUERY_ID:
{
WCHAR *id = ExAllocatePool(PagedPool, sizeof(WCHAR) * REGSTR_VAL_MAX_HCID_LEN);
TRACE("IRP_MN_QUERY_ID[%i]\n", irpsp->Parameters.QueryId.IdType);
switch (irpsp->Parameters.QueryId.IdType)
{
case BusQueryHardwareIDs:
case BusQueryCompatibleIDs:
{
WCHAR *ptr;
ptr = id;
/* Device instance ID */
lstrcpyW(ptr, ext->device_id);
ptr += lstrlenW(ext->device_id);
lstrcpyW(ptr, L"\\");
ptr += 1;
lstrcpyW(ptr, ext->instance_id);
ptr += lstrlenW(ext->instance_id) + 1;
/* Device ID */
lstrcpyW(ptr, ext->device_id);
ptr += lstrlenW(ext->device_id) + 1;
/* Bus ID */
lstrcpyW(ptr, L"HID");
ptr += lstrlenW(L"HID") + 1;
*ptr = 0;
irp->IoStatus.Information = (ULONG_PTR)id;
status = STATUS_SUCCESS;
break;
}
case BusQueryDeviceID:
lstrcpyW(id, ext->device_id);
irp->IoStatus.Information = (ULONG_PTR)id;
status = STATUS_SUCCESS;
break;
case BusQueryInstanceID:
lstrcpyW(id, ext->instance_id);
irp->IoStatus.Information = (ULONG_PTR)id;
status = STATUS_SUCCESS;
break;
case BusQueryContainerID:
case BusQueryDeviceSerialNumber:
FIXME("unimplemented id type %#x\n", irpsp->Parameters.QueryId.IdType);
ExFreePool(id);
break;
}
break;
}
case IRP_MN_QUERY_CAPABILITIES:
{
DEVICE_CAPABILITIES *caps = irpsp->Parameters.DeviceCapabilities.Capabilities;
caps->RawDeviceOK = 1;
status = STATUS_SUCCESS;
break;
}
case IRP_MN_START_DEVICE:
if ((status = IoRegisterDeviceInterface(device, ext->class_guid, NULL, &ext->u.pdo.link_name)))
{
ERR( "Failed to register interface, status %#lx.\n", status );
break;
}
/* FIXME: This should probably be done in mouhid.sys. */
if (desc->UsagePage == HID_USAGE_PAGE_GENERIC && desc->Usage == HID_USAGE_GENERIC_MOUSE)
{
if (!IoRegisterDeviceInterface(device, &GUID_DEVINTERFACE_MOUSE, NULL, &ext->u.pdo.mouse_link_name))
ext->u.pdo.is_mouse = TRUE;
}
if (desc->UsagePage == HID_USAGE_PAGE_GENERIC && desc->Usage == HID_USAGE_GENERIC_KEYBOARD)
{
if (!IoRegisterDeviceInterface(device, &GUID_DEVINTERFACE_KEYBOARD, NULL, &ext->u.pdo.keyboard_link_name))
ext->u.pdo.is_keyboard = TRUE;
}
IoSetDeviceInterfaceState(&ext->u.pdo.link_name, TRUE);
if (ext->u.pdo.is_mouse)
IoSetDeviceInterfaceState(&ext->u.pdo.mouse_link_name, TRUE);
if (ext->u.pdo.is_keyboard)
IoSetDeviceInterfaceState(&ext->u.pdo.keyboard_link_name, TRUE);
ext->u.pdo.removed = FALSE;
status = STATUS_SUCCESS;
break;
case IRP_MN_REMOVE_DEVICE:
send_wm_input_device_change(ext, GIDC_REMOVAL);
IoSetDeviceInterfaceState(&ext->u.pdo.link_name, FALSE);
if (ext->u.pdo.is_mouse)
IoSetDeviceInterfaceState(&ext->u.pdo.mouse_link_name, FALSE);
if (ext->u.pdo.is_keyboard)
IoSetDeviceInterfaceState(&ext->u.pdo.keyboard_link_name, FALSE);
if (ext->u.pdo.thread)
{
SetEvent(ext->u.pdo.halt_event);
WaitForSingleObject(ext->u.pdo.thread, INFINITE);
}
CloseHandle(ext->u.pdo.halt_event);
KeAcquireSpinLock( &ext->u.pdo.queues_lock, &irql );
LIST_FOR_EACH_ENTRY_SAFE( queue, next, &ext->u.pdo.queues, struct hid_queue, entry )
hid_queue_destroy( queue );
KeReleaseSpinLock( &ext->u.pdo.queues_lock, irql );
HidP_FreeCollectionDescription(&ext->u.pdo.device_desc);
RtlFreeUnicodeString(&ext->u.pdo.link_name);
irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest(irp, IO_NO_INCREMENT);
IoDeleteDevice(device);
return STATUS_SUCCESS;
case IRP_MN_SURPRISE_REMOVAL:
KeAcquireSpinLock(&ext->u.pdo.lock, &irql);
ext->u.pdo.removed = TRUE;
KeReleaseSpinLock(&ext->u.pdo.lock, irql);
KeAcquireSpinLock( &ext->u.pdo.queues_lock, &irql );
LIST_FOR_EACH_ENTRY_SAFE( queue, next, &ext->u.pdo.queues, struct hid_queue, entry )
hid_queue_remove_pending_irps( queue );
KeReleaseSpinLock( &ext->u.pdo.queues_lock, irql );
SetEvent(ext->u.pdo.halt_event);
status = STATUS_SUCCESS;
break;
default:
FIXME("Unhandled minor function %#x.\n", irpsp->MinorFunction);
}
irp->IoStatus.Status = status;
IoCompleteRequest( irp, IO_NO_INCREMENT );
return status;
}
static NTSTATUS WINAPI driver_pnp(DEVICE_OBJECT *device, IRP *irp)
{
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
if (ext->is_fdo)
return fdo_pnp(device, irp);
else
return pdo_pnp(device, irp);
}
static NTSTATUS WINAPI driver_create(DEVICE_OBJECT *device, IRP *irp)
{
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
if (ext->is_fdo)
{
irp->IoStatus.Status = STATUS_UNSUCCESSFUL;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_UNSUCCESSFUL;
}
return pdo_create(device, irp);
}
static NTSTATUS WINAPI driver_close(DEVICE_OBJECT *device, IRP *irp)
{
return pdo_close(device, irp);
}
static NTSTATUS WINAPI driver_ioctl(DEVICE_OBJECT *device, IRP *irp)
{
return pdo_ioctl(device, irp);
}
static NTSTATUS WINAPI driver_read(DEVICE_OBJECT *device, IRP *irp)
{
return pdo_read(device, irp);
}
static NTSTATUS WINAPI driver_write(DEVICE_OBJECT *device, IRP *irp)
{
return pdo_write(device, irp);
}
static void WINAPI driver_unload(DRIVER_OBJECT *driver)
{
minidriver *md;
TRACE("\n");
if ((md = find_minidriver(driver)))
{
if (md->DriverUnload)
md->DriverUnload(md->minidriver.DriverObject);
list_remove(&md->entry);
free(md);
}
}
NTSTATUS WINAPI HidRegisterMinidriver(HID_MINIDRIVER_REGISTRATION *registration)
{
minidriver *driver;
if (!(driver = calloc(1, sizeof(*driver))))
return STATUS_NO_MEMORY;
driver->DriverUnload = registration->DriverObject->DriverUnload;
registration->DriverObject->DriverUnload = driver_unload;
registration->DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = driver_ioctl;
registration->DriverObject->MajorFunction[IRP_MJ_READ] = driver_read;
registration->DriverObject->MajorFunction[IRP_MJ_WRITE] = driver_write;
registration->DriverObject->MajorFunction[IRP_MJ_CREATE] = driver_create;
registration->DriverObject->MajorFunction[IRP_MJ_CLOSE] = driver_close;
driver->PNPDispatch = registration->DriverObject->MajorFunction[IRP_MJ_PNP];
registration->DriverObject->MajorFunction[IRP_MJ_PNP] = driver_pnp;
driver->AddDevice = registration->DriverObject->DriverExtension->AddDevice;
registration->DriverObject->DriverExtension->AddDevice = driver_add_device;
driver->minidriver = *registration;
list_add_tail(&minidriver_list, &driver->entry);
return STATUS_SUCCESS;
}
void call_minidriver( ULONG code, DEVICE_OBJECT *device, void *in_buff, ULONG in_size,
void *out_buff, ULONG out_size, IO_STATUS_BLOCK *io )
{
IRP *irp;
KEVENT event;
KeInitializeEvent(&event, NotificationEvent, FALSE);
irp = IoBuildDeviceIoControlRequest( code, device, in_buff, in_size, out_buff, out_size, TRUE, &event, io );
if (IoCallDriver(device, irp) == STATUS_PENDING)
KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
}
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