static
VOID
GetIoQueueList_ProcessQueueListEntry(
PLIST_ENTRY QueueLE,
PSINGLE_LIST_ENTRY SListHead,
PVOID Tag
)
{
FxIoQueueNode* listNode;
FxIoQueue* queue;
//
// Skip any nodes that are not queues. They can be bookmarks for
// in-progress flush operations.
//
listNode = FxIoQueueNode::_FromListEntry(QueueLE);
if (listNode->IsNodeType(FxIoQueueNodeTypeQueue) == FALSE) {
return;
}
queue = FxIoQueue::_FromIoPkgListEntry(QueueLE);
PushEntryList(SListHead, &queue->m_PowerSListEntry);
//
// Add a reference since the request will be touched outside of the
// lock being held. We will use the enumerant value as the tag.
//
queue->ADDREF(Tag);
}
VOID
FxPkgIo::AddIoQueue(
__inout FxIoQueue* IoQueue
)
{
PLIST_ENTRY listHead, le;
FxIoQueue* queue;
KIRQL irql;
FxIoQueueNode* listNode;
CCHAR queueIndex, curIndex;
listHead = &m_IoQueueListHead;
queueIndex = FxDevice::GetCxDriverIndex(IoQueue->GetCxDeviceInfo());
Lock(&irql);
ASSERT(IoQueue->m_IoPkgListNode.IsNodeType(FxIoQueueNodeTypeQueue));
//
// Insert new queue in sorted list; search from last to first.
//
for (le = listHead->Blink; le != listHead; le = le->Blink) {
//
// Skip any nodes that are not queues. They can be bookmarks for
// in-progress flush operations.
//
listNode = FxIoQueueNode::_FromListEntry(le);
if (listNode->IsNodeType(FxIoQueueNodeTypeQueue) == FALSE) {
continue;
}
//
// Get current queue's driver index.
//
queue = FxIoQueue::_FromIoPkgListEntry(le);
curIndex = FxDevice::GetCxDriverIndex(queue->GetCxDeviceInfo());
//
// Queues are inserted in order at the end of its allowed range.
//
if (curIndex < queueIndex || curIndex == queueIndex) {
break;
}
}
InsertHeadList(le, &IoQueue->m_IoPkgListNode.m_ListEntry);
if (m_PowerStateOn) {
IoQueue->SetPowerState(FxIoQueuePowerOn);
} else {
IoQueue->SetPowerState(FxIoQueuePowerOff);
if (m_QueuesAreShuttingDown) {
// Clear accept requests
IoQueue->SetStateForShutdown();
}
}
Unlock(irql);
return;
}
VOID
FxPkgIo::ResetStateForRestart(
VOID
)
/*++
Routine Description:
This is called on a device which has been restarted from the removed
state. It will reset purged queues so that they can accept new requests
when ResumeProcessingForPower is called afterwards.
Arguments:
None
Return Value:
None
--*/
{
KIRQL irql;
FxIoQueue* queue;
SINGLE_LIST_ENTRY queueList, *ple;
DoTraceLevelMessage(GetDriverGlobals(), TRACE_LEVEL_INFORMATION, TRACINGIO,
"Restart queues from purged state for WDFDEVICE 0x%p due to "
"device restart", m_Device->GetHandle());
queueList.Next = NULL;
Lock(&irql);
GetIoQueueListLocked(&queueList, FxIoQueueIteratorListPowerOn);
Unlock(irql);
for (ple = PopEntryList(&queueList);
ple != NULL;
ple = PopEntryList(&queueList)) {
queue = FxIoQueue::_FromPowerSListEntry(ple);
queue->ResetStateForRestart();
ple->Next = NULL;
queue->RELEASE(IO_ITERATOR_POWER_TAG);
}
Lock(&irql);
m_PowerStateOn = TRUE;
m_QueuesAreShuttingDown = FALSE;
Unlock(irql);
return;
}
FxIoQueue*
FxPkgIo::GetNextIoQueueLocked(
__in FxIoQueueNode* QueueBookmark,
__in PVOID Tag
)
/*++
Routine Description:
Moves the provided bookmark ahead in the IO Package's queue list
and returns the next available queue (if any).
Return Value:
NULL if there are no more queues in list else
FxIoQueue* reference to the next queue in list.
--*/
{
PLIST_ENTRY ple = NULL;
FxIoQueue* queue = NULL;
FxIoQueueNode* listNode = NULL;
ASSERT(QueueBookmark->IsNodeType(FxIoQueueNodeTypeBookmark));
ASSERT(IsListEmpty(&QueueBookmark->m_ListEntry) == FALSE);
//
// Try to advance bookmark to next location.
//
ple = QueueBookmark->m_ListEntry.Flink;
RemoveEntryList(&QueueBookmark->m_ListEntry);
InitializeListHead(&QueueBookmark->m_ListEntry);
for (; ple != &m_IoQueueListHead; ple = ple->Flink) {
//
// Skip any nodes that are not queues. These nodes can be
// bookmarks for in-progress flush operations.
//
listNode = FxIoQueueNode::_FromListEntry(ple);
if (listNode->IsNodeType(FxIoQueueNodeTypeQueue)) {
//
// This entry is a real queue.
//
queue = FxIoQueue::_FromIoPkgListEntry(ple);
queue->ADDREF(Tag);
//
// Insert bookmark after this entry.
//
InsertHeadList(ple, &QueueBookmark->m_ListEntry);
break;
}
}
return queue;
}
_Must_inspect_result_
NTSTATUS
FxPkgIo::FlushAllQueuesByFileObject(
__in MdFileObject FileObject
)
/*++
Routine Description:
Enumerate all the queues and cancel the requests that have
the same fileobject as the Cleanup IRP.
We are making an assumption that cleanup irps are sent only
at passive-level.
Return Value:
NTSTATUS
--*/
{
FxIoQueue* queue = NULL;
PFX_DRIVER_GLOBALS pFxDriverGlobals = GetDriverGlobals();
FxIoQueueNode flushBookmark(FxIoQueueNodeTypeBookmark);
KIRQL irql;
if(Mx::MxGetCurrentIrql() != PASSIVE_LEVEL) {
DoTraceLevelMessage(pFxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGIO,
"Currently framework allow flushing of queues "
"by fileobject on cleanup only at PASSIVE_LEVEL");
FxVerifierDbgBreakPoint(pFxDriverGlobals);
return STATUS_SUCCESS;
}
//
// Iterate through the queue list and flush each one.
//
Lock(&irql);
queue = GetFirstIoQueueLocked(&flushBookmark, IO_ITERATOR_FLUSH_TAG);
Unlock(irql);
while(queue != NULL) {
queue->FlushByFileObject(FileObject);
queue->RELEASE(IO_ITERATOR_FLUSH_TAG);
Lock(&irql);
queue = GetNextIoQueueLocked(&flushBookmark, IO_ITERATOR_FLUSH_TAG);
Unlock(irql);
}
return STATUS_SUCCESS;
}
NTSTATUS
WDFEXPORT(WdfDeviceWdmDispatchIrpToIoQueue)(
__in
PWDF_DRIVER_GLOBALS DriverGlobals,
__in
WDFDEVICE Device,
__in
MdIrp Irp,
__in
WDFQUEUE Queue,
__in
ULONG Flags
)
{
FxIoQueue *queue;
FxDevice *device;
PFX_DRIVER_GLOBALS fxDriverGlobals;
PIO_STACK_LOCATION stack;
NTSTATUS status;
FxIoInCallerContext* ioInCallerCtx;
queue = NULL;
ioInCallerCtx = NULL;
FxObjectHandleGetPtr(GetFxDriverGlobals(DriverGlobals),
Device,
FX_TYPE_DEVICE,
(PVOID*) &device);
fxDriverGlobals = device->GetDriverGlobals();
FX_TRACK_DRIVER(fxDriverGlobals);
FxObjectHandleGetPtr(GetFxDriverGlobals(DriverGlobals),
Queue,
FX_TYPE_QUEUE,
(PVOID*)&queue);
FxPointerNotNull(fxDriverGlobals, Irp);
//
// If the caller is a preprocess routine, the contract for this DDI is just like IoCallDriver.
// The caller sets up their stack location and then the DDI advances to the next stack
// location. This means that the caller either has to call IoSkipCurrentIrpStackLocation
// or IoCopyCurrentIrpStackLocationToNext before calling this DDI.
//
if (Flags & WDF_DISPATCH_IRP_TO_IO_QUEUE_PREPROCESSED_IRP) {
IoSetNextIrpStackLocation(Irp);
}
//
// Verifier checks.
//
status = VerifyWdfDeviceWdmDispatchIrpToIoQueue(fxDriverGlobals,
device,
Irp,
queue,
Flags);
if(!NT_SUCCESS(status)) {
Irp->IoStatus.Status = status;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return status;
}
//
// Adjust stack if IRP needs to be forwarded to parent device.
//
if (device->m_ParentDevice == queue->GetDevice()) {
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetNextIrpStackLocation(Irp);
//
// From now on use new device.
//
device = device->m_ParentDevice;
//
// Save a pointer to the device object for this request so that it can
// be used later in completion.
//
stack = IoGetCurrentIrpStackLocation(Irp);
stack->DeviceObject = device->GetDeviceObject();
}
//
// Get in-context caller callback if required.
//
if (Flags & WDF_DISPATCH_IRP_TO_IO_QUEUE_INVOKE_INCALLERCTX_CALLBACK) {
ioInCallerCtx = device->m_PkgIo->GetIoInCallerContextCallback(
queue->GetCxDeviceInfo());
}
//
// DispatchStep2 will convert the IRP into a WDFREQUEST, queue it and if
// possible dispatch the request to the driver.
//
return device->m_PkgIo->DispatchStep2(Irp, ioInCallerCtx, queue);
}
VOID
FxIoTargetSelf::Send(
_In_ MdIrp Irp
)
/*++
Routine Description:
send an MdIrp to the Self IO Target.
Arguments:
MdIrp for IRP_MJ_READ, IRP_MJ_WRITE, or IRP_MJ_DEVICE_CONTROL
Returns:
VOID
Implementation Note:
Function body inspired by WdfDeviceWdmDispatchIrpToIoQueue API.
--*/
{
FxIrp irp(Irp);
FxIoQueue* queue;
NTSTATUS status;
UCHAR majorFunction;
FxIoInCallerContext* ioInCallerCtx;
#if (FX_CORE_MODE == FX_CORE_USER_MODE)
//
// Prepare the request to forward to the inteternal target.
//
(static_cast<IWudfIoIrp2*>(Irp))->PrepareToForwardToSelf();
#else
//
// Set Next Stack Location
//
irp.SetNextIrpStackLocation();
//
// Set Device Object.
//
irp.SetCurrentDeviceObject(m_Device->GetDeviceObject());
#endif
majorFunction = irp.GetMajorFunction();
//
// Retrieve Queue
//
queue = GetDispatchQueue(majorFunction);
if (queue == NULL) {
DoTraceLevelMessage(
GetDriverGlobals(), TRACE_LEVEL_ERROR, TRACINGIOTARGET,
"Send WDFIOTARGET %p, No Dispatch Queue Found for Major Function %d",
GetObjectHandle(), majorFunction);
status = STATUS_INVALID_DEVICE_STATE;
goto Fail;
}
//
// Only read/writes/ctrls/internal_ctrls IRPs are allowed to be sent to
// Self IO Target
//
if (m_Device->GetDispatchPackage(majorFunction) != m_Device->m_PkgIo) {
status = STATUS_INVALID_PARAMETER;
DoTraceLevelMessage(
GetDriverGlobals(), TRACE_LEVEL_ERROR, TRACINGIOTARGET,
"Only Read/Write/Control/Internal-Control IRPs can be "
"forwarded to Self IO Target 0x%p, %!IRPMJ!, "
"IRP_MN %x, Device 0x%p, %!STATUS!",
GetHandle(), majorFunction, irp.GetMinorFunction(),
m_Device->GetObjectHandle(), status);
FxVerifierDbgBreakPoint(GetDriverGlobals());
goto Fail;
}
//
// Retrieve the InContextCallback function
//
ioInCallerCtx = m_Device->m_PkgIo->GetIoInCallerContextCallback(
queue->GetCxDeviceInfo());
//
// DispatchStep2 will convert the IRP into a WDFREQUEST, queue it and if
// possible dispatch the request to the driver.
// If a failure occurs, DispatchStep2 completes teh Irp
//
(VOID) m_Device->m_PkgIo->DispatchStep2(Irp, ioInCallerCtx, queue);
return;
Fail:
irp.SetStatus(status);
irp.SetInformation(0);
irp.CompleteRequest(IO_NO_INCREMENT);
return;
}
_Must_inspect_result_
NTSTATUS
FxPkgIo::CreateQueue(
__in PWDF_IO_QUEUE_CONFIG Config,
__in PWDF_OBJECT_ATTRIBUTES QueueAttributes,
__in_opt FxDriver* Caller,
__deref_out FxIoQueue** ppQueue
)
{
PFX_DRIVER_GLOBALS pFxDriverGlobals;
FxObject* pParent;
FxIoQueue* pQueue;
NTSTATUS status;
FxDriver* pDriver;
pParent = NULL;
pQueue = NULL;
pDriver = NULL;
pFxDriverGlobals = GetDriverGlobals();
if (QueueAttributes != NULL && QueueAttributes->ParentObject != NULL) {
CfxDeviceBase* pSearchDevice;
FxObjectHandleGetPtr(pFxDriverGlobals,
QueueAttributes->ParentObject,
FX_TYPE_OBJECT,
(PVOID*)&pParent);
pSearchDevice = FxDeviceBase::_SearchForDevice(pParent, NULL);
if (pSearchDevice == NULL) {
status = STATUS_INVALID_DEVICE_REQUEST;
DoTraceLevelMessage(
pFxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGIO,
"QueueAttributes->ParentObject 0x%p must have WDFDEVICE as an "
"eventual ancestor, %!STATUS!",
QueueAttributes->ParentObject, status);
return status;
}
else if (pSearchDevice != m_DeviceBase) {
status = STATUS_INVALID_DEVICE_REQUEST;
DoTraceLevelMessage(
pFxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGIO,
"Attributes->ParentObject 0x%p ancestor is WDFDEVICE %p, but "
"not the same WDFDEVICE 0x%p passed to WdfIoQueueCreate, "
"%!STATUS!",
QueueAttributes->ParentObject, pSearchDevice->GetHandle(),
m_Device->GetHandle(), status);
return status;
}
}
else {
//
// By default, use the package as the parent
//
pParent = this;
}
//
// v1.11 and up: get driver object if driver handle is specified.
// Client driver can also specify a driver handle, the end result in this case is
// a PkgIoContext that is NULL (see below), i.e., the same as if driver handle
// was NULL.
//
if (Config->Size > sizeof(WDF_IO_QUEUE_CONFIG_V1_9) &&
Config->Driver != NULL) {
FxObjectHandleGetPtr(GetDriverGlobals(),
Config->Driver,
FX_TYPE_DRIVER,
(PVOID*)&pDriver);
}
status = FxIoQueue::_Create(pFxDriverGlobals,
QueueAttributes,
Config,
Caller,
this,
m_PowerStateOn,
&pQueue
);
if (!NT_SUCCESS(status)) {
ASSERT(pQueue == NULL);
return status;
}
//
// Class extension support: associate queue with a specific cx layer.
//
if (pDriver != NULL) {
pQueue->SetCxDeviceInfo(m_Device->GetCxDeviceInfo(pDriver));
}
status = pQueue->Commit(QueueAttributes, NULL, pParent);
if (!NT_SUCCESS(status)) {
pQueue->DeleteFromFailedCreate();
return status;
}
AddIoQueue(pQueue);
*ppQueue = pQueue;
return status;
}
//
// This inserts a request into the I/O processing pipeline
//
_Must_inspect_result_
NTSTATUS
FxPkgIo::EnqueueRequest(
__in CfxDevice* Device,
__inout FxRequest* pRequest
)
{
NTSTATUS status;
FxIoQueue* pQueue;
FxIrp* Irp = NULL;
FxRequestCompletionState oldState;
PFX_DRIVER_GLOBALS FxDriverGlobals = GetDriverGlobals();
SHORT origVerifierFlags = 0;
//
// Request is owned by the driver, and has a reference count of == 1
// (or > 1 if EvtIoInCallerContext callback took an additional reference),
// with a FxPkgIoInProcessRequestComplete callback registered.
//
ASSERT(pRequest->GetRefCnt() >= 1);
Irp = pRequest->GetFxIrp();
DoTraceLevelMessage(FxDriverGlobals, TRACE_LEVEL_VERBOSE, TRACINGIO,
"WDFREQUEST 0x%p", pRequest->GetObjectHandle());
status = VerifyEnqueueRequestUpdateFlags(FxDriverGlobals,
pRequest,
&origVerifierFlags);
if (!NT_SUCCESS(status)) {
return status;
}
//
// Get the associated queue
//
pQueue = (FxIoQueue*) pRequest->GetInternalContext();
if (NULL == pQueue) {
pQueue = m_DispatchTable[Irp->GetMajorFunction()];
if (pQueue == NULL) {
//
// No queue configured yet, fail request unless the driver is a filter.
//
if (m_Filter) {
goto Forward;
}
status = STATUS_INVALID_DEVICE_REQUEST;
DoTraceLevelMessage(FxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGIO,
"No queue configured for WDFDEVICE 0x%p, "
"failing WDFREQUEST 0x%p %!STATUS!",
Device->GetHandle(),
pRequest->GetObjectHandle(),
status);
FxVerifierDbgBreakPoint(FxDriverGlobals);
//
// Return it back to the driver to decide the outcome
//
goto Error;
}
}
//
// If the queue is a default-queue and driver is a filter then before
// calling the queue we should make sure the queue can dispatch
// requests to the driver. If the queue cannot dispatch request,
// we should forward it down to the lower driver ourself.
if (m_Filter &&
pQueue == m_DefaultQueue &&
pQueue->IsIoEventHandlerRegistered((WDF_REQUEST_TYPE)Irp->GetMajorFunction()) == FALSE) {
//
// Default queue doesn't have callback events registered to
// handle this request. So forward it down.
//
goto Forward;
}
pQueue->AddRef();
// Must add a reference before releasing the callback and its reference
pRequest->ADDREF(FXREQUEST_STATE_TAG);
// Release the callback
oldState = pRequest->SetCompletionState(FxRequestCompletionStateNone);
ASSERT(oldState != FxRequestCompletionStateNone);
UNREFERENCED_PARAMETER(oldState);
status = pQueue->QueueRequestFromForward(pRequest);
pQueue->Release();
//
// If not successfull, must place the request back
// to the state it was in on entry so that the driver
// can decide what to do next with it
//
if (!NT_SUCCESS(status)) {
//
// If the request comes back to us, it should still
// have a reference count of 1
//
oldState = pRequest->SetCompletionState(FxRequestCompletionStateIoPkg);
ASSERT(oldState == FxRequestCompletionStateNone);
UNREFERENCED_PARAMETER(oldState);
//
// Release the reference count on the request since
// the callback will hold the only one that gets
// decremented when the request is completed
//
pRequest->RELEASE(FXREQUEST_STATE_TAG);
goto Error;
}
else {
//
// On success, can not touch the request since it
// may have already been completed
//
}
return status;
Forward:
//
// Cannot send-and-forget a request with a formatted IO context.
//
if (pRequest->HasContext()) {
status = STATUS_INVALID_DEVICE_REQUEST;
DoTraceLevelMessage(
FxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGIO,
"Cannot send-and-forget WDFREQUEST 0x%p with formatted IO"
" context for filter WDFDEVICE 0x%p, %!STATUS!",
pRequest->GetObjectHandle(),
Device->GetHandle(),
status );
FxVerifierDbgBreakPoint(FxDriverGlobals);
goto Error;
}
//
// This will skip the current stack location and perform
// early dispose on the request.
//
pRequest->PreProcessSendAndForget();
(VOID)Irp->CallDriver(Device->GetAttachedDevice());
//
// This will delete the request and free the memory back
// to the device lookaside list.
//
pRequest->PostProcessSendAndForget();
//
// Return a success status in this code path even if the previous call
// to send the request to the lower driver failed. The status code returned
// by this function should reflect the status of enqueuing the request and
// not the status returned by the lower driver.
//
return STATUS_SUCCESS;
Error:
//
// If not successful, we must set the original verifier flags.
//
VerifyEnqueueRequestRestoreFlags(FxDriverGlobals, pRequest, origVerifierFlags);
return status;
}
FORCEINLINE
_Must_inspect_result_
NTSTATUS
__fastcall
FxPkgIo::DispatchStep1(
__inout MdIrp Irp,
__in WDFCONTEXT DispatchContext
)
/*++
Routine Description:
Checks for any registered dynamic dispatch callbacks that handles this type of request, else
selects the default queue based on the IRP's major code.
Arguments:
Irp - WDM request.
DispatchContext - Is the next FxIrpDynamicDispatchInfo element.
Return Value:
Irp's status.
--*/
{
NTSTATUS status;
FxIrp fxIrp(Irp);
ASSERT(((UCHAR)DispatchContext & FX_IN_DISPATCH_CALLBACK) == 0);
ASSERT(fxIrp.GetMajorFunction() <= IRP_MJ_MAXIMUM_FUNCTION);
//
// Look for I/O dynamic dispatch callbacks.
//
if ((PLIST_ENTRY)DispatchContext != &m_DynamicDispatchInfoListHead) {
int index;
index = FxIrpDynamicDispatchInfo::Mj2Index(fxIrp.GetMajorFunction());
//
// Only read/writes/ctrls/internal_ctrls IRPs are allowed, i.e., request cannot
// IRP type in its callback.
//
if (index >= (int)FxIrpDynamicDispatchInfo::DynamicDispatchMax) {
status = STATUS_INVALID_PARAMETER;
DoTraceLevelMessage(
GetDriverGlobals(), TRACE_LEVEL_ERROR, TRACINGIO,
"Driver cannot change the IRP type in its dispatch "
"callback Irp 0x%p, %!IRPMJ!, IRP_MN %x, Device 0x%p, "
"%!STATUS!",
Irp, fxIrp.GetMajorFunction(), fxIrp.GetMinorFunction(),
m_Device->GetHandle(), status);
FxVerifierDbgBreakPoint(GetDriverGlobals());
goto CompleteIrp;
}
//
// Verifier checks.
//
status = VerifyDispatchContext(GetDriverGlobals(), DispatchContext);
if( !NT_SUCCESS(status)) {
goto CompleteIrp;
}
do {
FxIrpDynamicDispatchInfo* info;
info = CONTAINING_RECORD(DispatchContext,
FxIrpDynamicDispatchInfo,
ListEntry);
//
// Advance to next node.
//
DispatchContext = (WDFCONTEXT)(((PLIST_ENTRY)DispatchContext)->Flink);
ASSERT(((UCHAR)DispatchContext & FX_IN_DISPATCH_CALLBACK) == 0);
ASSERT(fxIrp.GetMajorFunction() == IRP_MJ_READ ||
fxIrp.GetMajorFunction() == IRP_MJ_WRITE ||
fxIrp.GetMajorFunction() == IRP_MJ_DEVICE_CONTROL ||
fxIrp.GetMajorFunction() == IRP_MJ_INTERNAL_DEVICE_CONTROL);
//
// If registered, invoke dispatch callback for this major function.
//
ASSERT(index < (int)FxIrpDynamicDispatchInfo::DynamicDispatchMax);
if (NULL != info->Dispatch[index].EvtDeviceDynamicDispatch) {
return info->Dispatch[index].EvtDeviceDynamicDispatch(
m_Device->GetHandle(),
fxIrp.GetMajorFunction(),
fxIrp.GetMinorFunction(),
fxIrp.GetParameterIoctlCode(),
info->Dispatch[index].DriverContext,
reinterpret_cast<PIRP> (fxIrp.GetIrp()),
(WDFCONTEXT)((ULONG_PTR)DispatchContext |
FX_IN_DISPATCH_CALLBACK)
);
}
} while ((PLIST_ENTRY)DispatchContext !=
&m_DynamicDispatchInfoListHead);
}
//
// Only now push these local variables on the stack, this is to keep the
// stack from growing unnecessarily in the dynamic dispatch path above.
//
FxIoQueue* queue;
FxIoInCallerContext* ioInCallerCtx;
//
// Get the queue from the dispatch-table
//
queue = m_DispatchTable[fxIrp.GetMajorFunction()];
if (queue == NULL) {
ioInCallerCtx = GetIoInCallerContextCallback(NULL);
if (ioInCallerCtx->m_Method == NULL) {
//
// No queue configured yet, fail request unless the driver is a filter.
//
if (m_Filter) {
goto Forward;
}
status = STATUS_INVALID_DEVICE_REQUEST;
DoTraceLevelMessage(
GetDriverGlobals(), TRACE_LEVEL_ERROR, TRACINGIO,
"No queue configured for WDFDEVICE 0x%p, failing IRP 0x%p,"
" %!STATUS!",
m_Device->GetHandle(), Irp, status);
goto CompleteIrp;
}
}
else {
ioInCallerCtx = GetIoInCallerContextCallback(queue->GetCxDeviceInfo());
}
//
// If the driver is filter and queue is a default-queue then before
// calling the queue, we should make sure the queue can dispatch
// requests to the driver. If the queue cannot dispatch request,
// we should forward it down to the lower driver ourself.
// This is to cover the scenario where the driver has registered only
// type specific handler and expect the framework to auto-forward other
// requests.
//
if (m_Filter &&
ioInCallerCtx->m_Method == NULL &&
queue == m_DefaultQueue &&
queue->IsIoEventHandlerRegistered((WDF_REQUEST_TYPE)fxIrp.GetMajorFunction()) == FALSE) {
//
// Default queue doesn't have callback events registered to
// handle this request. So forward it down.
//
goto Forward;
}
//
// Finally queue request.
//
return DispatchStep2(Irp, ioInCallerCtx, queue);
Forward:
fxIrp.SkipCurrentIrpStackLocation();
return fxIrp.CallDriver(m_Device->GetAttachedDevice());
CompleteIrp:
fxIrp.SetStatus(status);
fxIrp.SetInformation(0);
fxIrp.CompleteRequest(IO_NO_INCREMENT);
return status;
}
_Must_inspect_result_
NTSTATUS
FxPkgIo::ResumeProcessingForPower()
/*++
Routine Description:
Resumes all PowerManaged queues for automatic I/O processing due to
a power event that allows I/O to resume.
Non-PowerManaged queues are left alone.
Arguments:
Return Value:
NTSTATUS
--*/
{
KIRQL irql;
FxIoQueue* queue;
SINGLE_LIST_ENTRY queueList, *ple;
DoTraceLevelMessage(GetDriverGlobals(), TRACE_LEVEL_INFORMATION, TRACINGIO,
"Power resume all queues of WDFDEVICE 0x%p",
m_Device->GetHandle());
queueList.Next = NULL;
Lock(&irql);
GetIoQueueListLocked(&queueList, FxIoQueueIteratorListPowerOn);
//
// Change the state so that new queues created while we
// are resuming the existing queues can be in a powered-on state.
//
m_PowerStateOn = TRUE;
//
// Change the accepting state so that new queues created while we
// are resuming the existing queues can be accept request.
//
m_QueuesAreShuttingDown = FALSE;
Unlock(irql);
//
// We will power-up the queues in two steps. First we will resume
// the power of all the queues and then we will start dispatching I/Os.
// This is to avoid a queue being powered up at the begining of the list
// trying to forward a request to another queue lower in the list that's
// not powered up yet.
//
for(ple = queueList.Next; ple != NULL; ple = ple->Next) {
queue = FxIoQueue::_FromPowerSListEntry(ple);
queue->ResumeProcessingForPower();
}
for (ple = PopEntryList(&queueList);
ple != NULL;
ple = PopEntryList(&queueList)) {
queue = FxIoQueue::_FromPowerSListEntry(ple);
queue->StartPowerTransitionOn();
ple->Next = NULL;
queue->RELEASE(IO_ITERATOR_POWER_TAG);
}
return STATUS_SUCCESS;
}
_Must_inspect_result_
NTSTATUS
FxPkgIo::StopProcessingForPower(
__in FxIoStopProcessingForPowerAction Action
)
/*++
Routine Description:
Stops all PowerManaged queues automatic I/O processing due to
a power event that requires I/O to stop.
This is called on a PASSIVE_LEVEL thread that can block until
I/O has been stopped, or completed/cancelled.
Arguments:
Action -
FxIoStopProcessingForPowerHold:
the function returns when the driver has acknowledged that it has
stopped all I/O processing, but may have outstanding "in-flight" requests
that have not been completed.
FxIoStopProcessingForPowerPurgeManaged:
the function returns when all requests from a power managed queue have
been completed and/or cancelled., and there are no more in-flight requests.
FxIoStopProcessingForPowerPurgeNonManaged:
the function returns when all requests from a non-power managed queue have
been completed and/or cancelled., and there are no more in-flight requests.
Only called during device-remove.
Return Value:
NTSTATUS
--*/
{
KIRQL irql;
FxIoQueue* queue;
SINGLE_LIST_ENTRY queueList, *ple;
DoTraceLevelMessage(GetDriverGlobals(), TRACE_LEVEL_INFORMATION, TRACINGIO,
"Perform %!FxIoStopProcessingForPowerAction! for all queues of "
"WDFDEVICE 0x%p", Action, m_Device->GetHandle());
queueList.Next = NULL;
Lock(&irql);
//
// Device is moving into low power state. So any new queues
// created after this point would start off as powered off.
//
m_PowerStateOn = FALSE;
//
// If queues are shutting down, any new queue created after
// this point would not accept any requests.
//
switch(Action) {
case FxIoStopProcessingForPowerPurgeManaged:
case FxIoStopProcessingForPowerPurgeNonManaged:
m_QueuesAreShuttingDown = TRUE;
break;
}
GetIoQueueListLocked(&queueList, FxIoQueueIteratorListPowerOff);
Unlock(irql);
//
// If the power action is hold then first change the state of all the queues
// to PowerStartTransition. This will prevent the queues from dispatching
// new requests before we start asking each queue to stop processing
// inflight requests.
//
if(Action == FxIoStopProcessingForPowerHold) {
//
// Walk the list without popping entries because we need to scan
// the list again.
//
for(ple = queueList.Next; ple != NULL; ple = ple->Next) {
queue = FxIoQueue::_FromPowerSListEntry(ple);
queue->StartPowerTransitionOff();
}
}
//
// Ask the queues to stop processing inflight requests.
//
for (ple = PopEntryList(&queueList); ple != NULL;
ple = PopEntryList(&queueList)) {
queue = FxIoQueue::_FromPowerSListEntry(ple);
queue->StopProcessingForPower(Action);
ple->Next = NULL;
queue->RELEASE(IO_ITERATOR_POWER_TAG);
}
return STATUS_SUCCESS;
}
