VOID
OsrFxEvtIoRead(
_In_ WDFQUEUE Queue,
_In_ WDFREQUEST Request,
_In_ size_t Length
)
/*++
Routine Description:
Called by the framework when it receives Read or Write requests.
Arguments:
Queue - Default queue handle
Request - Handle to the read/write request
Lenght - Length of the data buffer associated with the request.
The default property of the queue is to not dispatch
zero lenght read & write requests to the driver and
complete is with status success. So we will never get
a zero length request.
Return Value:
--*/
{
WDFUSBPIPE pipe;
NTSTATUS status;
WDFMEMORY reqMemory;
PDEVICE_CONTEXT pDeviceContext;
GUID activity = RequestToActivityId(Request);
UNREFERENCED_PARAMETER(Queue);
//
// Log read start event, using IRP activity ID if available or request
// handle otherwise.
//
EventWriteReadStart(&activity, WdfIoQueueGetDevice(Queue), (ULONG)Length);
TraceEvents(TRACE_LEVEL_VERBOSE, DBG_READ, "-->OsrFxEvtIoRead\n");
//
// First validate input parameters.
//
if (Length > TEST_BOARD_TRANSFER_BUFFER_SIZE) {
TraceEvents(TRACE_LEVEL_ERROR, DBG_READ, "Transfer exceeds %d\n",
TEST_BOARD_TRANSFER_BUFFER_SIZE);
status = STATUS_INVALID_PARAMETER;
goto Exit;
}
pDeviceContext = GetDeviceContext(WdfIoQueueGetDevice(Queue));
pipe = pDeviceContext->BulkReadPipe;
status = WdfRequestRetrieveOutputMemory(Request, &reqMemory);
if(!NT_SUCCESS(status)){
TraceEvents(TRACE_LEVEL_ERROR, DBG_READ,
"WdfRequestRetrieveOutputMemory failed %!STATUS!\n", status);
goto Exit;
}
//
// The format call validates to make sure that you are reading or
// writing to the right pipe type, sets the appropriate transfer flags,
// creates an URB and initializes the request.
//
status = WdfUsbTargetPipeFormatRequestForRead(pipe,
Request,
reqMemory,
NULL // Offsets
);
if (!NT_SUCCESS(status)) {
TraceEvents(TRACE_LEVEL_ERROR, DBG_READ,
"WdfUsbTargetPipeFormatRequestForRead failed 0x%x\n", status);
goto Exit;
}
WdfRequestSetCompletionRoutine(
Request,
EvtRequestReadCompletionRoutine,
pipe);
//
// Send the request asynchronously.
//
if (WdfRequestSend(Request, WdfUsbTargetPipeGetIoTarget(pipe), WDF_NO_SEND_OPTIONS) == FALSE) {
//
// Framework couldn't send the request for some reason.
//
TraceEvents(TRACE_LEVEL_ERROR, DBG_READ, "WdfRequestSend failed\n");
status = WdfRequestGetStatus(Request);
goto Exit;
}
Exit:
if (!NT_SUCCESS(status)) {
//
// log event read failed
//
EventWriteReadFail(&activity, WdfIoQueueGetDevice(Queue), status);
WdfRequestCompleteWithInformation(Request, status, 0);
}
TraceEvents(TRACE_LEVEL_INFORMATION, DBG_READ, "<-- OsrFxEvtIoRead\n");
return;
}
VOID
OsrFxEvtIoWrite(
__in WDFQUEUE Queue,
__in WDFREQUEST Request,
__in size_t Length
)
/*++
Routine Description:
Called by the framework when it receives Read or Write requests.
Arguments:
Queue - Default queue handle
Request - Handle to the read/write request
Lenght - Length of the data buffer associated with the request.
The default property of the queue is to not dispatch
zero lenght read & write requests to the driver and
complete is with status success. So we will never get
a zero length request.
Return Value:
--*/
{
NTSTATUS status;
WDFUSBPIPE pipe;
WDFMEMORY reqMemory;
PDEVICE_CONTEXT pDeviceContext;
GUID activity = RequestToActivityId(Request);
UNREFERENCED_PARAMETER(Queue);
//
// Log write start event, using request as activity id.
//
EventWriteReadStart(&activity, WdfIoQueueGetDevice(Queue), (ULONG)Length);
TraceEvents(TRACE_LEVEL_VERBOSE, DBG_WRITE, "-->OsrFxEvtIoWrite\n");
//
// First validate input parameters.
//
if (Length > TEST_BOARD_TRANSFER_BUFFER_SIZE) {
TraceEvents(TRACE_LEVEL_ERROR, DBG_READ, "Transfer exceeds %d\n",
TEST_BOARD_TRANSFER_BUFFER_SIZE);
status = STATUS_INVALID_PARAMETER;
goto Exit;
}
pDeviceContext = GetDeviceContext(WdfIoQueueGetDevice(Queue));
pipe = pDeviceContext->BulkWritePipe;
status = WdfRequestRetrieveInputMemory(Request, &reqMemory);
if(!NT_SUCCESS(status)){
TraceEvents(TRACE_LEVEL_ERROR, DBG_WRITE, "WdfRequestRetrieveInputBuffer failed\n");
goto Exit;
}
status = WdfUsbTargetPipeFormatRequestForWrite(pipe,
Request,
reqMemory,
NULL); // Offset
if (!NT_SUCCESS(status)) {
TraceEvents(TRACE_LEVEL_ERROR, DBG_WRITE,
"WdfUsbTargetPipeFormatRequest failed 0x%x\n", status);
goto Exit;
}
WdfRequestSetCompletionRoutine(
Request,
EvtRequestWriteCompletionRoutine,
pipe);
//
// Send the request asynchronously.
//
if (WdfRequestSend(Request, WdfUsbTargetPipeGetIoTarget(pipe), WDF_NO_SEND_OPTIONS) == FALSE) {
//
// Framework couldn't send the request for some reason.
//
TraceEvents(TRACE_LEVEL_ERROR, DBG_WRITE, "WdfRequestSend failed\n");
status = WdfRequestGetStatus(Request);
goto Exit;
}
Exit:
if (!NT_SUCCESS(status)) {
//
// log event write failed
//
EventWriteWriteFail(&activity, WdfIoQueueGetDevice(Queue), status);
WdfRequestCompleteWithInformation(Request, status, 0);
}
TraceEvents(TRACE_LEVEL_VERBOSE, DBG_WRITE, "<-- OsrFxEvtIoWrite\n");
return;
}
