kvm-guest-drivers-windows

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/*
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 * Main driver file containing DriverEntry and driver related functions
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 *
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 * Copyright (c) 2016-2017 Red Hat, Inc.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met :
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and / or other materials provided with the distribution.
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 * 3. Neither the names of the copyright holders nor the names of their contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include "precomp.h"
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#include "vioinput.h"
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#if defined(EVENT_TRACING)
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#include "Driver.tmh"
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#endif
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DRIVER_INITIALIZE DriverEntry;
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// Context cleanup callbacks generally run at IRQL <= DISPATCH_LEVEL but
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// WDFDRIVER context cleanup is guaranteed to run at PASSIVE_LEVEL.
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// Annotate the prototype to make static analysis happy.
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EVT_WDF_OBJECT_CONTEXT_CLEANUP _IRQL_requires_(PASSIVE_LEVEL) VIOInputEvtDriverContextCleanup;
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text (INIT, DriverEntry)
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#pragma alloc_text (PAGE, VIOInputEvtDriverContextCleanup)
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#endif
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NTSTATUS
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DriverEntry(
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    IN PDRIVER_OBJECT  DriverObject,
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    IN PUNICODE_STRING RegistryPath)
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{
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    NTSTATUS              status = STATUS_SUCCESS;
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    WDF_DRIVER_CONFIG     config;
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    WDF_OBJECT_ATTRIBUTES attributes;
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    WDFDRIVER             driver;
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    ExInitializeDriverRuntime(DrvRtPoolNxOptIn);
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    InitializeDebugPrints(DriverObject, RegistryPath);
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    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_INIT,
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        "Virtio-input driver started...built on %s %s\n", __DATE__, __TIME__);
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    WDF_DRIVER_CONFIG_INIT(&config,VIOInputEvtDeviceAdd);
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    config.DriverPoolTag  = VIOINPUT_DRIVER_MEMORY_TAG;
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    WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
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    attributes.EvtCleanupCallback = VIOInputEvtDriverContextCleanup;
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    status = WdfDriverCreate(DriverObject,
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                             RegistryPath,
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                             &attributes,
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                             &config,
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                             &driver);
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    if (!NT_SUCCESS(status))
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    {
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        TraceEvents(TRACE_LEVEL_ERROR, DBG_INIT,
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           "WdfDriverCreate failed - 0x%x\n", status);
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        WPP_CLEANUP(DriverObject);
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        return status;
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    }
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    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP, "<-- %s\n", __FUNCTION__);
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    return status;
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}
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VOID
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VIOInputEvtDriverContextCleanup(
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    IN WDFOBJECT Driver)
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{
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    PAGED_CODE();
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    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP, "<--> %s\n", __FUNCTION__);
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    WPP_CLEANUP(WdfDriverWdmGetDriverObject((WDFDRIVER)Driver));
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}
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