1278 lines
32 KiB
C
1278 lines
32 KiB
C
#if defined(i386)
|
||
|
||
/*++
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||
|
||
Copyright (c) 1989, 1990, 1991, 1992, 1993 Microsoft Corporation
|
||
|
||
Module Name:
|
||
|
||
inpcmn.c
|
||
|
||
Abstract:
|
||
|
||
The common portions of the Microsoft InPort mouse port driver.
|
||
This file should not require modification to support new mice
|
||
that are similar to the InPort mouse.
|
||
|
||
Environment:
|
||
|
||
Kernel mode only.
|
||
|
||
Notes:
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||
|
||
NOTES: (Future/outstanding issues)
|
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|
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- Powerfail not implemented.
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|
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- IOCTL_INTERNAL_MOUSE_DISCONNECT has not been implemented. It's not
|
||
needed until the class unload routine is implemented. Right now,
|
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we don't want to allow the mouse class driver to unload.
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- Consolidate duplicate code, where possible and appropriate.
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||
|
||
Revision History:
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||
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||
--*/
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#include "stdarg.h"
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#include "stdio.h"
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#include "string.h"
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#include "ntddk.h"
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#include "inport.h"
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#include "inplog.h"
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//
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// Declare the global debug flag for this driver.
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//
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#if DBG
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ULONG InportDebug = 0;
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||
#endif
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|
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VOID
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||
InportErrorLogDpc(
|
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IN PKDPC Dpc,
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||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN PIRP Irp,
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||
IN PVOID Context
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||
)
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||
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||
/*++
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||
|
||
Routine Description:
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||
|
||
This routine runs at DISPATCH_LEVEL IRQL to log errors that are
|
||
discovered at IRQL > DISPATCH_LEVEL (e.g., in the ISR routine or
|
||
in a routine that is executed via KeSynchronizeExecution). There
|
||
is not necessarily a current request associated with this condition.
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||
|
||
Arguments:
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||
|
||
Dpc - Pointer to the DPC object.
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||
|
||
DeviceObject - Pointer to the device object.
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||
|
||
Irp - Not used.
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||
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||
Context - Indicates type of error to log.
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||
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||
Return Value:
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||
|
||
None.
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||
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||
--*/
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||
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{
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||
PDEVICE_EXTENSION deviceExtension;
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PIO_ERROR_LOG_PACKET errorLogEntry;
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UNREFERENCED_PARAMETER(Dpc);
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UNREFERENCED_PARAMETER(Irp);
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InpPrint((2, "INPORT-InportErrorLogDpc: enter\n"));
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deviceExtension = DeviceObject->DeviceExtension;
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//
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// Log an error packet.
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//
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errorLogEntry = (PIO_ERROR_LOG_PACKET)IoAllocateErrorLogEntry(
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DeviceObject,
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sizeof(IO_ERROR_LOG_PACKET)
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+ (2 * sizeof(ULONG))
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||
);
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if (errorLogEntry != NULL) {
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errorLogEntry->DumpDataSize = 2 * sizeof(ULONG);
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if ((ULONG) Context == INPORT_MOU_BUFFER_OVERFLOW) {
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errorLogEntry->UniqueErrorValue = INPORT_ERROR_VALUE_BASE + 210;
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errorLogEntry->DumpData[0] = sizeof(MOUSE_INPUT_DATA);
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errorLogEntry->DumpData[1] =
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deviceExtension->Configuration.MouseAttributes.InputDataQueueLength;
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} else {
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errorLogEntry->UniqueErrorValue = INPORT_ERROR_VALUE_BASE + 220;
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errorLogEntry->DumpData[0] = 0;
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errorLogEntry->DumpData[1] = 0;
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}
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errorLogEntry->ErrorCode = (ULONG) Context;
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errorLogEntry->SequenceNumber = 0;
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errorLogEntry->MajorFunctionCode = 0;
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errorLogEntry->IoControlCode = 0;
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errorLogEntry->RetryCount = 0;
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errorLogEntry->FinalStatus = 0;
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IoWriteErrorLogEntry(errorLogEntry);
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}
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InpPrint((2, "INPORT-InportErrorLogDpc: exit\n"));
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||
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}
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NTSTATUS
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InportFlush(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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{
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UNREFERENCED_PARAMETER(DeviceObject);
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||
UNREFERENCED_PARAMETER(Irp);
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InpPrint((2,"INPORT-InportFlush: enter\n"));
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InpPrint((2,"INPORT-InportFlush: exit\n"));
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return(STATUS_NOT_IMPLEMENTED);
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}
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||
NTSTATUS
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InportInternalDeviceControl(
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IN PDEVICE_OBJECT DeviceObject,
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||
IN PIRP Irp
|
||
)
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/*++
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Routine Description:
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This routine is the dispatch routine for internal device control requests.
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||
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Arguments:
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||
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DeviceObject - Pointer to the device object.
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||
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Irp - Pointer to the request packet.
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||
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||
Return Value:
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||
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Status is returned.
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||
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--*/
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{
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||
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PIO_STACK_LOCATION irpSp;
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PDEVICE_EXTENSION deviceExtension;
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||
NTSTATUS status;
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InpPrint((2,"INPORT-InportInternalDeviceControl: enter\n"));
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||
|
||
//
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// Get a pointer to the device extension.
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||
//
|
||
|
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deviceExtension = DeviceObject->DeviceExtension;
|
||
|
||
//
|
||
// Initialize the returned Information field.
|
||
//
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||
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Irp->IoStatus.Information = 0;
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||
|
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//
|
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// Get a pointer to the current parameters for this request. The
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||
// information is contained in the current stack location.
|
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//
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||
|
||
irpSp = IoGetCurrentIrpStackLocation(Irp);
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||
|
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//
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||
// Case on the device control subfunction that is being performed by the
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// requestor.
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//
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switch (irpSp->Parameters.DeviceIoControl.IoControlCode) {
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|
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//
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// Connect a mouse class device driver to the port driver.
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//
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case IOCTL_INTERNAL_MOUSE_CONNECT:
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InpPrint((
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2,
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||
"INPORT-InportInternalDeviceControl: mouse connect\n"
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||
));
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//
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// Only allow one connection.
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//
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// FUTURE: Consider allowing multiple connections, just for
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// the sake of generality?
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//
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|
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if (deviceExtension->ConnectData.ClassService
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!= NULL) {
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||
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InpPrint((
|
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2,
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||
"INPORT-InportInternalDeviceControl: error - already connected\n"
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||
));
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status = STATUS_SHARING_VIOLATION;
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break;
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||
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||
} else
|
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if (irpSp->Parameters.DeviceIoControl.InputBufferLength <
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sizeof(CONNECT_DATA)) {
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InpPrint((
|
||
2,
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||
"INPORT-InportInternalDeviceControl: error - invalid buffer length\n"
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||
));
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||
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||
status = STATUS_INVALID_PARAMETER;
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break;
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}
|
||
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||
//
|
||
// Copy the connection parameters to the device extension.
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||
//
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||
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deviceExtension->ConnectData =
|
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*((PCONNECT_DATA) (irpSp->Parameters.DeviceIoControl.Type3InputBuffer));
|
||
|
||
//
|
||
// Reinitialize the port input data queue synchronously.
|
||
//
|
||
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||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
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(PKSYNCHRONIZE_ROUTINE) InpInitializeDataQueue,
|
||
(PVOID) deviceExtension
|
||
);
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||
|
||
//
|
||
// Set the completion status.
|
||
//
|
||
|
||
status = STATUS_SUCCESS;
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||
break;
|
||
|
||
//
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||
// Disconnect a mouse class device driver from the port driver.
|
||
//
|
||
// NOTE: Not implemented.
|
||
//
|
||
|
||
case IOCTL_INTERNAL_MOUSE_DISCONNECT:
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||
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InpPrint((
|
||
2,
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"INPORT-InportInternalDeviceControl: mouse disconnect\n"
|
||
));
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||
|
||
//
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||
// Perform a mouse interrupt disable call.
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||
//
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||
|
||
//
|
||
// Clear the connection parameters in the device extension.
|
||
// NOTE: Must synchronize this with the mouse ISR.
|
||
//
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||
//
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||
//deviceExtension->ConnectData.ClassDeviceObject =
|
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// Null;
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||
//deviceExtension->ConnectData.ClassService =
|
||
// Null;
|
||
|
||
//
|
||
// Set the completion status.
|
||
//
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||
|
||
status = STATUS_NOT_IMPLEMENTED;
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||
break;
|
||
|
||
//
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||
// Enable mouse interrupts (mark the request pending and handle
|
||
// it in StartIo).
|
||
//
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||
|
||
case IOCTL_INTERNAL_MOUSE_ENABLE:
|
||
|
||
InpPrint((
|
||
2,
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||
"INPORT-InportInternalDeviceControl: mouse enable\n"
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||
));
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||
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||
status = STATUS_PENDING;
|
||
break;
|
||
|
||
//
|
||
// Disable mouse interrupts (mark the request pending and handle
|
||
// it in StartIo).
|
||
//
|
||
|
||
case IOCTL_INTERNAL_MOUSE_DISABLE:
|
||
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportInternalDeviceControl: mouse disable\n"
|
||
));
|
||
|
||
status = STATUS_PENDING;
|
||
break;
|
||
|
||
//
|
||
// Query the mouse attributes. First check for adequate buffer
|
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// length. Then, copy the mouse attributes from the device
|
||
// extension to the output buffer.
|
||
//
|
||
|
||
case IOCTL_MOUSE_QUERY_ATTRIBUTES:
|
||
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportInternalDeviceControl: mouse query attributes\n"
|
||
));
|
||
|
||
if (irpSp->Parameters.DeviceIoControl.OutputBufferLength <
|
||
sizeof(MOUSE_ATTRIBUTES)) {
|
||
status = STATUS_BUFFER_TOO_SMALL;
|
||
} else {
|
||
|
||
//
|
||
// Copy the attributes from the DeviceExtension to the
|
||
// buffer.
|
||
//
|
||
|
||
*(PMOUSE_ATTRIBUTES) Irp->AssociatedIrp.SystemBuffer =
|
||
deviceExtension->Configuration.MouseAttributes;
|
||
|
||
Irp->IoStatus.Information = sizeof(MOUSE_ATTRIBUTES);
|
||
status = STATUS_SUCCESS;
|
||
}
|
||
|
||
break;
|
||
|
||
default:
|
||
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportInternalDeviceControl: INVALID REQUEST\n"
|
||
));
|
||
|
||
status = STATUS_INVALID_DEVICE_REQUEST;
|
||
break;
|
||
}
|
||
|
||
Irp->IoStatus.Status = status;
|
||
if (status == STATUS_PENDING) {
|
||
IoMarkIrpPending(Irp);
|
||
IoStartPacket(DeviceObject, Irp, (PULONG)NULL, NULL);
|
||
} else {
|
||
IoCompleteRequest(Irp, IO_NO_INCREMENT);
|
||
}
|
||
|
||
InpPrint((2,"INPORT-InportInternalDeviceControl: exit\n"));
|
||
|
||
return(status);
|
||
|
||
}
|
||
|
||
VOID
|
||
InportIsrDpc(
|
||
IN PKDPC Dpc,
|
||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN PIRP Irp,
|
||
IN PVOID Context
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine runs at DISPATCH_LEVEL IRQL to finish processing
|
||
mouse interrupts. It is queued in the mouse ISR. The real
|
||
work is done via a callback to the connected mouse class driver.
|
||
|
||
Arguments:
|
||
|
||
Dpc - Pointer to the DPC object.
|
||
|
||
DeviceObject - Pointer to the device object.
|
||
|
||
Irp - Pointer to the Irp.
|
||
|
||
Context - Not used.
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
|
||
PDEVICE_EXTENSION deviceExtension;
|
||
GET_DATA_POINTER_CONTEXT getPointerContext;
|
||
SET_DATA_POINTER_CONTEXT setPointerContext;
|
||
VARIABLE_OPERATION_CONTEXT operationContext;
|
||
PVOID classService;
|
||
PVOID classDeviceObject;
|
||
LONG interlockedResult;
|
||
BOOLEAN moreDpcProcessing;
|
||
ULONG dataNotConsumed = 0;
|
||
ULONG inputDataConsumed = 0;
|
||
LARGE_INTEGER deltaTime;
|
||
|
||
UNREFERENCED_PARAMETER(Dpc);
|
||
UNREFERENCED_PARAMETER(Irp);
|
||
UNREFERENCED_PARAMETER(Context);
|
||
|
||
InpPrint((2, "INPORT-InportIsrDpc: enter\n"));
|
||
|
||
deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
|
||
|
||
//
|
||
// Use DpcInterlockVariable to determine whether the DPC is running
|
||
// concurrently on another processor. We only want one instantiation
|
||
// of the DPC to actually do any work. DpcInterlockVariable is -1
|
||
// when no DPC is executing. We increment it, and if the result is
|
||
// zero then the current instantiation is the only one executing, and it
|
||
// is okay to proceed. Otherwise, we just return.
|
||
//
|
||
//
|
||
|
||
operationContext.VariableAddress =
|
||
&deviceExtension->DpcInterlockVariable;
|
||
operationContext.Operation = IncrementOperation;
|
||
operationContext.NewValue = &interlockedResult;
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpDpcVariableOperation,
|
||
(PVOID) &operationContext
|
||
);
|
||
|
||
moreDpcProcessing = (interlockedResult == 0)? TRUE:FALSE;
|
||
|
||
while (moreDpcProcessing) {
|
||
|
||
dataNotConsumed = 0;
|
||
inputDataConsumed = 0;
|
||
|
||
//
|
||
// Get the port InputData queue pointers synchronously.
|
||
//
|
||
|
||
getPointerContext.DeviceExtension = deviceExtension;
|
||
setPointerContext.DeviceExtension = deviceExtension;
|
||
setPointerContext.InputCount = 0;
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpGetDataQueuePointer,
|
||
(PVOID) &getPointerContext
|
||
);
|
||
|
||
if (getPointerContext.InputCount != 0) {
|
||
|
||
//
|
||
// Call the connected class driver's callback ISR with the
|
||
// port InputData queue pointers. If we have to wrap the queue,
|
||
// break the operation into two pieces, and call the class callback
|
||
// ISR once for each piece.
|
||
//
|
||
|
||
classDeviceObject =
|
||
deviceExtension->ConnectData.ClassDeviceObject;
|
||
classService =
|
||
deviceExtension->ConnectData.ClassService;
|
||
ASSERT(classService != NULL);
|
||
|
||
if (getPointerContext.DataOut >= getPointerContext.DataIn) {
|
||
|
||
//
|
||
// We'll have to wrap the InputData circular buffer. Call
|
||
// the class callback ISR with the chunk of data starting at
|
||
// DataOut and ending at the end of the queue.
|
||
//
|
||
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportIsrDpc: calling class callback\n"
|
||
));
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportIsrDpc: with Start 0x%x and End 0x%x\n",
|
||
getPointerContext.DataOut,
|
||
deviceExtension->DataEnd
|
||
));
|
||
|
||
(*(PSERVICE_CALLBACK_ROUTINE) classService)(
|
||
classDeviceObject,
|
||
getPointerContext.DataOut,
|
||
deviceExtension->DataEnd,
|
||
&inputDataConsumed
|
||
);
|
||
|
||
dataNotConsumed = (((PUCHAR)
|
||
deviceExtension->DataEnd -
|
||
(PUCHAR) getPointerContext.DataOut)
|
||
/ sizeof(MOUSE_INPUT_DATA)) - inputDataConsumed;
|
||
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportIsrDpc: (Wrap) Call callback consumed %d items, left %d\n",
|
||
inputDataConsumed,
|
||
dataNotConsumed
|
||
));
|
||
|
||
setPointerContext.InputCount += inputDataConsumed;
|
||
|
||
if (dataNotConsumed) {
|
||
setPointerContext.DataOut =
|
||
((PUCHAR)getPointerContext.DataOut) +
|
||
(inputDataConsumed * sizeof(MOUSE_INPUT_DATA));
|
||
} else {
|
||
setPointerContext.DataOut =
|
||
deviceExtension->InputData;
|
||
getPointerContext.DataOut = setPointerContext.DataOut;
|
||
}
|
||
}
|
||
|
||
//
|
||
// Call the class callback ISR with data remaining in the queue.
|
||
//
|
||
|
||
if ((dataNotConsumed == 0) &&
|
||
(inputDataConsumed < getPointerContext.InputCount)){
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportIsrDpc: calling class callback\n"
|
||
));
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportIsrDpc: with Start 0x%x and End 0x%x\n",
|
||
getPointerContext.DataOut,
|
||
getPointerContext.DataIn
|
||
));
|
||
|
||
(*(PSERVICE_CALLBACK_ROUTINE) classService)(
|
||
classDeviceObject,
|
||
getPointerContext.DataOut,
|
||
getPointerContext.DataIn,
|
||
&inputDataConsumed
|
||
);
|
||
|
||
dataNotConsumed = (((PUCHAR) getPointerContext.DataIn -
|
||
(PUCHAR) getPointerContext.DataOut)
|
||
/ sizeof(MOUSE_INPUT_DATA)) - inputDataConsumed;
|
||
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportIsrDpc: Call callback consumed %d items, left %d\n",
|
||
inputDataConsumed,
|
||
dataNotConsumed
|
||
));
|
||
|
||
setPointerContext.DataOut =
|
||
((PUCHAR)getPointerContext.DataOut) +
|
||
(inputDataConsumed * sizeof(MOUSE_INPUT_DATA));
|
||
setPointerContext.InputCount += inputDataConsumed;
|
||
|
||
}
|
||
|
||
//
|
||
// Update the port InputData queue DataOut pointer and InputCount
|
||
// synchronously.
|
||
//
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpSetDataQueuePointer,
|
||
(PVOID) &setPointerContext
|
||
);
|
||
|
||
}
|
||
|
||
if (dataNotConsumed) {
|
||
|
||
//
|
||
// The class driver was unable to consume all the data.
|
||
// Reset the interlocked variable to -1. We do not want
|
||
// to attempt to move more data to the class driver at this
|
||
// point, because it is already overloaded. Need to wait a
|
||
// while to give the Raw Input Thread a chance to read some
|
||
// of the data out of the class driver's queue. We accomplish
|
||
// this "wait" via a timer.
|
||
//
|
||
|
||
InpPrint((2, "INPORT-InportIsrDpc: set timer in DPC\n"));
|
||
|
||
operationContext.Operation = WriteOperation;
|
||
interlockedResult = -1;
|
||
operationContext.NewValue = &interlockedResult;
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpDpcVariableOperation,
|
||
(PVOID) &operationContext
|
||
);
|
||
|
||
deltaTime.LowPart = (ULONG)(-10 * 1000 * 1000);
|
||
deltaTime.HighPart = -1;
|
||
|
||
(VOID) KeSetTimer(
|
||
&deviceExtension->DataConsumptionTimer,
|
||
deltaTime,
|
||
&deviceExtension->IsrDpcRetry
|
||
);
|
||
|
||
moreDpcProcessing = FALSE;
|
||
|
||
} else {
|
||
|
||
//
|
||
// Decrement DpcInterlockVariable. If the result goes negative,
|
||
// then we're all finished processing the DPC. Otherwise, either
|
||
// the ISR incremented DpcInterlockVariable because it has more
|
||
// work for the ISR DPC to do, or a concurrent DPC executed on
|
||
// some processor while the current DPC was running (the
|
||
// concurrent DPC wouldn't have done any work). Make sure that
|
||
// the current DPC handles any extra work that is ready to be
|
||
// done.
|
||
//
|
||
|
||
operationContext.Operation = DecrementOperation;
|
||
operationContext.NewValue = &interlockedResult;
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpDpcVariableOperation,
|
||
(PVOID) &operationContext
|
||
);
|
||
|
||
if (interlockedResult != -1) {
|
||
|
||
//
|
||
// The interlocked variable is still greater than or equal to
|
||
// zero. Reset it to zero, so that we execute the loop one
|
||
// more time (assuming no more DPCs execute and bump the
|
||
// variable up again).
|
||
//
|
||
|
||
operationContext.Operation = WriteOperation;
|
||
interlockedResult = 0;
|
||
operationContext.NewValue = &interlockedResult;
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpDpcVariableOperation,
|
||
(PVOID) &operationContext
|
||
);
|
||
|
||
InpPrint((2, "INPORT-InportIsrDpc: loop in DPC\n"));
|
||
} else {
|
||
moreDpcProcessing = FALSE;
|
||
}
|
||
}
|
||
}
|
||
|
||
InpPrint((2, "INPORT-InportIsrDpc: exit\n"));
|
||
|
||
}
|
||
|
||
NTSTATUS
|
||
InportOpenClose(
|
||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN PIRP Irp
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This is the dispatch routine for create/open and close requests.
|
||
These requests complete successfully.
|
||
|
||
Arguments:
|
||
|
||
DeviceObject - Pointer to the device object.
|
||
|
||
Irp - Pointer to the request packet.
|
||
|
||
Return Value:
|
||
|
||
Status is returned.
|
||
|
||
--*/
|
||
|
||
{
|
||
|
||
UNREFERENCED_PARAMETER(DeviceObject);
|
||
|
||
InpPrint((3,"INPORT-InportOpenClose: enter\n"));
|
||
|
||
//
|
||
// Complete the request with successful status.
|
||
//
|
||
|
||
Irp->IoStatus.Status = STATUS_SUCCESS;
|
||
Irp->IoStatus.Information = 0;
|
||
IoCompleteRequest(Irp, IO_NO_INCREMENT);
|
||
|
||
InpPrint((3,"INPORT-InportOpenClose: exit\n"));
|
||
|
||
return(STATUS_SUCCESS);
|
||
|
||
} // end InportOpenClose
|
||
|
||
VOID
|
||
InportStartIo(
|
||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN PIRP Irp
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine starts an I/O operation for the device.
|
||
|
||
Arguments:
|
||
|
||
DeviceObject - Pointer to the device object.
|
||
|
||
Irp - Pointer to the request packet.
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
PDEVICE_EXTENSION deviceExtension;
|
||
PIO_STACK_LOCATION irpSp;
|
||
|
||
InpPrint((2, "INPORT-InportStartIo: enter\n"));
|
||
|
||
deviceExtension = DeviceObject->DeviceExtension;
|
||
|
||
//
|
||
// Bump the error log sequence number.
|
||
//
|
||
|
||
deviceExtension->SequenceNumber += 1;
|
||
|
||
//
|
||
// Get a pointer to the current parameters for this request. The
|
||
// information is contained in the current stack location.
|
||
//
|
||
|
||
irpSp = IoGetCurrentIrpStackLocation(Irp);
|
||
|
||
//
|
||
// We know we got here with an internal device control request. Switch
|
||
// on IoControlCode.
|
||
//
|
||
|
||
switch(irpSp->Parameters.DeviceIoControl.IoControlCode) {
|
||
|
||
//
|
||
// Enable mouse interrupts, by calling InpEnableInterrupts
|
||
// synchronously.
|
||
//
|
||
|
||
case IOCTL_INTERNAL_MOUSE_ENABLE:
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpEnableInterrupts,
|
||
(PVOID) deviceExtension
|
||
);
|
||
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InportStartIo: mouse enable (count %d)\n",
|
||
deviceExtension->MouseEnableCount
|
||
));
|
||
|
||
Irp->IoStatus.Status = STATUS_SUCCESS;
|
||
|
||
//
|
||
// Complete the request.
|
||
//
|
||
|
||
IoStartNextPacket(DeviceObject, FALSE);
|
||
IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
|
||
|
||
break;
|
||
|
||
//
|
||
// Disable mouse interrupts, by calling InpDisableInterrupts
|
||
// synchronously.
|
||
//
|
||
|
||
case IOCTL_INTERNAL_MOUSE_DISABLE:
|
||
|
||
InpPrint((2, "INPORT-InportStartIo: mouse disable"));
|
||
|
||
if (deviceExtension->MouseEnableCount == 0) {
|
||
|
||
//
|
||
// Mouse already disabled.
|
||
//
|
||
|
||
InpPrint((2, " - error\n"));
|
||
|
||
Irp->IoStatus.Status = STATUS_DEVICE_DATA_ERROR;
|
||
|
||
} else {
|
||
|
||
//
|
||
// Disable mouse by calling InpDisableInterrupts.
|
||
//
|
||
|
||
KeSynchronizeExecution(
|
||
deviceExtension->InterruptObject,
|
||
(PKSYNCHRONIZE_ROUTINE) InpDisableInterrupts,
|
||
(PVOID) deviceExtension
|
||
);
|
||
|
||
InpPrint((
|
||
2,
|
||
" (count %d)\n",
|
||
deviceExtension->MouseEnableCount
|
||
));
|
||
|
||
Irp->IoStatus.Status = STATUS_SUCCESS;
|
||
}
|
||
|
||
//
|
||
// Complete the request.
|
||
//
|
||
|
||
IoStartNextPacket(DeviceObject, FALSE);
|
||
IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
|
||
|
||
break;
|
||
|
||
default:
|
||
|
||
InpPrint((2, "INPORT-InportStartIo: INVALID REQUEST\n"));
|
||
|
||
//
|
||
// Log an internal error. Note that we're calling the
|
||
// error log DPC routine directly, rather than duplicating
|
||
// code.
|
||
//
|
||
|
||
InportErrorLogDpc(
|
||
(PKDPC) NULL,
|
||
DeviceObject,
|
||
Irp,
|
||
(PVOID) (ULONG) INPORT_INVALID_STARTIO_REQUEST
|
||
);
|
||
|
||
ASSERT(FALSE);
|
||
break;
|
||
}
|
||
|
||
InpPrint((2, "INPORT-InportStartIo: exit\n"));
|
||
|
||
return;
|
||
}
|
||
|
||
#if DBG
|
||
VOID
|
||
InpDebugPrint(
|
||
ULONG DebugPrintLevel,
|
||
PCCHAR DebugMessage,
|
||
...
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Debug print routine.
|
||
|
||
Arguments:
|
||
|
||
Debug print level between 0 and 3, with 3 being the most verbose.
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
va_list ap;
|
||
|
||
va_start(ap, DebugMessage);
|
||
|
||
if (DebugPrintLevel <= InportDebug) {
|
||
|
||
char buffer[128];
|
||
|
||
(VOID) vsprintf(buffer, DebugMessage, ap);
|
||
|
||
DbgPrint(buffer);
|
||
}
|
||
|
||
va_end(ap);
|
||
|
||
}
|
||
#endif
|
||
|
||
VOID
|
||
InpDpcVariableOperation(
|
||
IN PVOID Context
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine is called synchronously by the ISR DPC to perform an
|
||
operation on the InterlockedDpcVariable. The operations that can be
|
||
performed include increment, decrement, write, and read. The ISR
|
||
itself reads and writes the InterlockedDpcVariable without calling this
|
||
routine.
|
||
|
||
Arguments:
|
||
|
||
Context - Pointer to a structure containing the address of the variable
|
||
to be operated on, the operation to perform, and the address at
|
||
which to copy the resulting value of the variable (the latter is also
|
||
used to pass in the value to write to the variable, on a write
|
||
operation).
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
PVARIABLE_OPERATION_CONTEXT operationContext = Context;
|
||
|
||
InpPrint((3,"INPORT-InpDpcVariableOperation: enter\n"));
|
||
InpPrint((
|
||
3,
|
||
"\tPerforming %s at 0x%x (current value 0x%x)\n",
|
||
(operationContext->Operation == IncrementOperation)? "increment":
|
||
(operationContext->Operation == DecrementOperation)? "decrement":
|
||
(operationContext->Operation == WriteOperation)? "write":
|
||
(operationContext->Operation == ReadOperation)? "read":"",
|
||
operationContext->VariableAddress,
|
||
*(operationContext->VariableAddress)
|
||
));
|
||
|
||
//
|
||
// Perform the specified operation at the specified address.
|
||
//
|
||
|
||
switch(operationContext->Operation) {
|
||
case IncrementOperation:
|
||
*(operationContext->VariableAddress) += 1;
|
||
break;
|
||
case DecrementOperation:
|
||
*(operationContext->VariableAddress) -= 1;
|
||
break;
|
||
case ReadOperation:
|
||
break;
|
||
case WriteOperation:
|
||
InpPrint((
|
||
3,
|
||
"\tWriting 0x%x\n",
|
||
*(operationContext->NewValue)
|
||
));
|
||
*(operationContext->VariableAddress) =
|
||
*(operationContext->NewValue);
|
||
break;
|
||
default:
|
||
ASSERT(FALSE);
|
||
break;
|
||
}
|
||
|
||
*(operationContext->NewValue) = *(operationContext->VariableAddress);
|
||
|
||
InpPrint((
|
||
3,
|
||
"INPORT-InpDpcVariableOperation: exit with value 0x%x\n",
|
||
*(operationContext->NewValue)
|
||
));
|
||
}
|
||
|
||
VOID
|
||
InpGetDataQueuePointer(
|
||
IN PVOID Context
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine is called synchronously to get the current DataIn and DataOut
|
||
pointers for the port InputData queue.
|
||
|
||
Arguments:
|
||
|
||
Context - Pointer to a structure containing the device extension,
|
||
address at which to store the current DataIn pointer, and the
|
||
address at which to store the current DataOut pointer.
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
PDEVICE_EXTENSION deviceExtension;
|
||
|
||
InpPrint((3,"INPORT-InpGetDataQueuePointer: enter\n"));
|
||
|
||
//
|
||
// Get address of device extension.
|
||
//
|
||
|
||
deviceExtension = (PDEVICE_EXTENSION)
|
||
((PGET_DATA_POINTER_CONTEXT) Context)->DeviceExtension;
|
||
|
||
//
|
||
// Get the DataIn and DataOut pointers.
|
||
//
|
||
|
||
InpPrint((
|
||
3,
|
||
"INPORT-InpGetDataQueuePointer: DataIn 0x%x, DataOut 0x%x\n",
|
||
deviceExtension->DataIn,
|
||
deviceExtension->DataOut
|
||
));
|
||
((PGET_DATA_POINTER_CONTEXT) Context)->DataIn = deviceExtension->DataIn;
|
||
((PGET_DATA_POINTER_CONTEXT) Context)->DataOut = deviceExtension->DataOut;
|
||
((PGET_DATA_POINTER_CONTEXT) Context)->InputCount =
|
||
deviceExtension->InputCount;
|
||
|
||
InpPrint((3,"INPORT-InpGetDataQueuePointer: exit\n"));
|
||
}
|
||
|
||
VOID
|
||
InpInitializeDataQueue (
|
||
IN PVOID Context
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine initializes the input data queue. It is called
|
||
via KeSynchronization, except when called from the initialization routine.
|
||
|
||
Arguments:
|
||
|
||
Context - Pointer to the device extension.
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
|
||
PDEVICE_EXTENSION deviceExtension;
|
||
|
||
InpPrint((3,"INPORT-InpInitializeDataQueue: enter\n"));
|
||
|
||
//
|
||
// Get address of device extension.
|
||
//
|
||
|
||
deviceExtension = (PDEVICE_EXTENSION) Context;
|
||
|
||
//
|
||
// Initialize the input data queue.
|
||
//
|
||
|
||
deviceExtension->InputCount = 0;
|
||
deviceExtension->DataIn = deviceExtension->InputData;
|
||
deviceExtension->DataOut = deviceExtension->InputData;
|
||
|
||
deviceExtension->OkayToLogOverflow = TRUE;
|
||
|
||
InpPrint((3,"INPORT-InpInitializeDataQueue: exit\n"));
|
||
|
||
}
|
||
|
||
VOID
|
||
InpSetDataQueuePointer(
|
||
IN PVOID Context
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine is called synchronously to set the DataOut pointer
|
||
and InputCount for the port InputData queue.
|
||
|
||
Arguments:
|
||
|
||
Context - Pointer to a structure containing the device extension
|
||
and the new DataOut value for the port InputData queue.
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
PDEVICE_EXTENSION deviceExtension;
|
||
|
||
InpPrint((3,"INPORT-InpSetDataQueuePointer: enter\n"));
|
||
|
||
//
|
||
// Get address of device extension.
|
||
//
|
||
|
||
deviceExtension = (PDEVICE_EXTENSION)
|
||
((PSET_DATA_POINTER_CONTEXT) Context)->DeviceExtension;
|
||
|
||
//
|
||
// Set the DataOut pointer.
|
||
//
|
||
|
||
InpPrint((
|
||
3,
|
||
"INPORT-InpSetDataQueuePointer: old mouse DataOut 0x%x, InputCount %d\n",
|
||
deviceExtension->DataOut,
|
||
deviceExtension->InputCount
|
||
));
|
||
deviceExtension->DataOut = ((PSET_DATA_POINTER_CONTEXT) Context)->DataOut;
|
||
deviceExtension->InputCount -=
|
||
((PSET_DATA_POINTER_CONTEXT) Context)->InputCount;
|
||
|
||
if (deviceExtension->InputCount == 0) {
|
||
|
||
//
|
||
// Reset the flag that determines whether it is time to log
|
||
// queue overflow errors. We don't want to log errors too often.
|
||
// Instead, log an error on the first overflow that occurs after
|
||
// the ring buffer has been emptied, and then stop logging errors
|
||
// until it gets cleared out and overflows again.
|
||
//
|
||
|
||
InpPrint((
|
||
1,
|
||
"INPORT-InpSetDataQueuePointer: Okay to log overflow\n"
|
||
));
|
||
deviceExtension->OkayToLogOverflow = TRUE;
|
||
}
|
||
|
||
InpPrint((
|
||
3,
|
||
"INPORT-InpSetDataQueuePointer: new mouse DataOut 0x%x, InputCount %d\n",
|
||
deviceExtension->DataOut,
|
||
deviceExtension->InputCount
|
||
));
|
||
|
||
InpPrint((3,"INPORT-InpSetDataQueuePointer: exit\n"));
|
||
}
|
||
|
||
BOOLEAN
|
||
InpWriteDataToQueue(
|
||
PDEVICE_EXTENSION DeviceExtension,
|
||
IN PMOUSE_INPUT_DATA InputData
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine adds input data from the mouse to the InputData queue.
|
||
|
||
Arguments:
|
||
|
||
DeviceExtension - Pointer to the device extension.
|
||
|
||
InputData - Pointer to the data to add to the InputData queue.
|
||
|
||
Return Value:
|
||
|
||
Returns TRUE if the data was added, otherwise FALSE.
|
||
|
||
--*/
|
||
|
||
{
|
||
|
||
InpPrint((2,"INPORT-InpWriteDataToQueue: enter\n"));
|
||
InpPrint((
|
||
3,
|
||
"INPORT-InpWriteDataToQueue: DataIn 0x%x, DataOut 0x%x\n",
|
||
DeviceExtension->DataIn,
|
||
DeviceExtension->DataOut
|
||
));
|
||
InpPrint((
|
||
3,
|
||
"INPORT-InpWriteDataToQueue: InputCount %d\n",
|
||
DeviceExtension->InputCount
|
||
));
|
||
|
||
//
|
||
// Check for full input data queue.
|
||
//
|
||
|
||
if ((DeviceExtension->DataIn == DeviceExtension->DataOut) &&
|
||
(DeviceExtension->InputCount != 0)) {
|
||
|
||
//
|
||
// The input data queue is full. Intentionally ignore
|
||
// the new data.
|
||
//
|
||
|
||
InpPrint((1,"INPORT-InpWriteDataToQueue: OVERFLOW\n"));
|
||
return(FALSE);
|
||
|
||
} else {
|
||
*(DeviceExtension->DataIn) = *InputData;
|
||
DeviceExtension->InputCount += 1;
|
||
DeviceExtension->DataIn++;
|
||
InpPrint((
|
||
2,
|
||
"INPORT-InpWriteDataToQueue: new InputCount %d\n",
|
||
DeviceExtension->InputCount
|
||
));
|
||
if (DeviceExtension->DataIn ==
|
||
DeviceExtension->DataEnd) {
|
||
InpPrint((2,"INPORT-InpWriteDataToQueue: wrap buffer\n"));
|
||
DeviceExtension->DataIn = DeviceExtension->InputData;
|
||
}
|
||
}
|
||
|
||
InpPrint((2,"INPORT-InpWriteDataToQueue: exit\n"));
|
||
|
||
return(TRUE);
|
||
}
|
||
|
||
#endif
|