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/*++
Module Name:
driver.c
Abstract:
This file contains the driver entry points and callbacks.
Environment:
User-mode Driver Framework 2
--*/
#include "driver.h"
#include "driver.tmh"
NTSTATUS
DriverEntry(
_In_ PDRIVER_OBJECT DriverObject,
_In_ PUNICODE_STRING RegistryPath
)
/*++
Routine Description:
DriverEntry initializes the driver and is the first routine called by the
system after the driver is loaded. DriverEntry specifies the other entry
points in the function driver, such as EvtDevice and DriverUnload.
Parameters Description:
DriverObject - represents the instance of the function driver that is loaded
into memory. DriverEntry must initialize members of DriverObject before it
returns to the caller. DriverObject is allocated by the system before the
driver is loaded, and it is released by the system after the system unloads
the function driver from memory.
RegistryPath - represents the driver specific path in the Registry.
The function driver can use the path to store driver related data between
reboots. The path does not store hardware instance specific data.
Return Value:
STATUS_SUCCESS if successful,
STATUS_UNSUCCESSFUL otherwise.
--*/
{
WDF_DRIVER_CONFIG config;
NTSTATUS status;
WDF_OBJECT_ATTRIBUTES attributes;
//
// Initialize WPP Tracing
//
#if UMDF_VERSION_MAJOR == 2 && UMDF_VERSION_MINOR == 0
WPP_INIT_TRACING(MYDRIVER_TRACING_ID);
#else
WPP_INIT_TRACING( DriverObject, RegistryPath );
#endif
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Entry");
//
// Register a cleanup callback so that we can call WPP_CLEANUP when
// the framework driver object is deleted during driver unload.
//
WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
attributes.EvtCleanupCallback = SimpleMediaSourceDriverEvtDriverContextCleanup;
WDF_DRIVER_CONFIG_INIT(&config,
SimpleMediaSourceDriverEvtDeviceAdd
);
status = WdfDriverCreate(DriverObject,
RegistryPath,
&attributes,
&config,
WDF_NO_HANDLE
);
if (!NT_SUCCESS(status)) {
TraceEvents(TRACE_LEVEL_ERROR, TRACE_DRIVER, "WdfDriverCreate failed %!STATUS!", status);
#if UMDF_VERSION_MAJOR == 2 && UMDF_VERSION_MINOR == 0
WPP_CLEANUP();
#else
WPP_CLEANUP(DriverObject);
#endif
return status;
}
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Exit");
return status;
}
NTSTATUS
SimpleMediaSourceDriverEvtDeviceAdd(
_In_ WDFDRIVER Driver,
_Inout_ PWDFDEVICE_INIT DeviceInit
)
/*++
Routine Description:
EvtDeviceAdd is called by the framework in response to AddDevice
call from the PnP manager. We create and initialize a device object to
represent a new instance of the device.
Arguments:
Driver - Handle to a framework driver object created in DriverEntry
DeviceInit - Pointer to a framework-allocated WDFDEVICE_INIT structure.
Return Value:
NTSTATUS
--*/
{
NTSTATUS status;
UNREFERENCED_PARAMETER(Driver);
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Entry");
status = SimpleMediaSourceDriverCreateDevice(DeviceInit);
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Exit");
return status;
}
VOID
SimpleMediaSourceDriverEvtDriverContextCleanup(
_In_ WDFOBJECT DriverObject
)
/*++
Routine Description:
Free all the resources allocated in DriverEntry.
Arguments:
DriverObject - handle to a WDF Driver object.
Return Value:
VOID.
--*/
{
UNREFERENCED_PARAMETER(DriverObject);
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Entry");
//
// Stop WPP Tracing
//
#if UMDF_VERSION_MAJOR == 2 && UMDF_VERSION_MINOR == 0
WPP_CLEANUP();
#else
WPP_CLEANUP(WdfDriverWdmGetDriverObject((WDFDRIVER)DriverObject));
#endif
}
|
