3 ** Mouse class driver 0.0.1
4 ** Written by Jason Filby (jasonfilby@yahoo.com)
5 ** For ReactOS (www.reactos.com)
7 ** The class driver between win32k and the various mouse port drivers
9 ** TODO: Change interface to win32k to a callback instead of ReadFile IO
10 Add support for multiple port devices
14 #include <ddk/ntddk.h>
15 #include "../include/mouse.h"
21 BOOLEAN AlreadyOpened = FALSE;
23 BOOLEAN MouseClassCallBack(PDEVICE_OBJECT ClassDeviceObject, PMOUSE_INPUT_DATA MouseDataStart,
24 PMOUSE_INPUT_DATA MouseDataEnd, PULONG InputCount)
26 PDEVICE_EXTENSION ClassDeviceExtension = ClassDeviceObject->DeviceExtension;
29 PIO_STACK_LOCATION Stack;
31 // In classical NT, you would take the input data and pipe it through the IO system, for the GDI to read.
32 // In ReactOS, however, we use a GDI callback for increased mouse responsiveness. The reason we don't
33 // simply call from the port driver is so that our mouse class driver can support NT mouse port drivers.
35 /* if(ClassDeviceExtension->ReadIsPending == TRUE)
37 Irp = ClassDeviceObject->CurrentIrp;
38 ClassDeviceObject->CurrentIrp = NULL;
39 Stack = IoGetCurrentIrpStackLocation(Irp);
41 ReadSize = sizeof(MOUSE_INPUT_DATA) * (*InputCount);
43 // A read request is waiting for input, so go straight to it
44 RtlMoveMemory(Irp->AssociatedIrp.SystemBuffer, (PCHAR)MouseDataStart, ReadSize);
46 // Go to next packet and complete this request with STATUS_SUCCESS
47 Irp->IoStatus.Status = STATUS_SUCCESS;
48 Irp->IoStatus.Information = ReadSize;
49 Stack->Parameters.Read.Length = ReadSize;
51 IoStartNextPacket(ClassDeviceObject, FALSE);
52 IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
53 ClassDeviceExtension->ReadIsPending = FALSE;
56 // If we have data from the port driver and a higher service to send the data to
57 if((*InputCount>0) && (*(PGDI_SERVICE_CALLBACK_ROUTINE)ClassDeviceExtension->GDIInformation.CallBack != NULL))
59 if(ClassDeviceExtension->InputCount + *InputCount > MOUSE_BUFFER_SIZE)
61 ReadSize = MOUSE_BUFFER_SIZE - ClassDeviceExtension->InputCount;
63 ReadSize = *InputCount;
66 // FIXME: If we exceed the buffer, mouse data gets thrown away.. better solution?
69 // Move the mouse input data from the port data queue to our class data queue
70 RtlMoveMemory(ClassDeviceExtension->PortData, (PCHAR)MouseDataStart,
71 sizeof(MOUSE_INPUT_DATA) * ReadSize);
73 // Move the pointer and counter up
74 ClassDeviceExtension->PortData += ReadSize;
75 ClassDeviceExtension->InputCount += ReadSize;
77 // Throw data up to GDI callback
78 if(*(PGDI_SERVICE_CALLBACK_ROUTINE)ClassDeviceExtension->GDIInformation.CallBack != NULL) {
79 DPRINT("MouseClassCallBack() Calling GDI callback at %p\n", ClassDeviceExtension->GDIInformation.CallBack);
80 (*(PGDI_SERVICE_CALLBACK_ROUTINE)ClassDeviceExtension->GDIInformation.CallBack)
81 (ClassDeviceExtension->PortData - ReadSize, ReadSize);
83 DPRINT("MouseClassCallBack() NO GDI callback installed\n");
86 ClassDeviceExtension->PortData -= ReadSize;
87 ClassDeviceExtension->InputCount -= ReadSize;
88 ClassDeviceExtension->ReadIsPending = FALSE;
90 DPRINT("MouseClassCallBack() entered, InputCount = %d - DOING NOTHING\n", *InputCount);
96 NTSTATUS ConnectMousePortDriver(PDEVICE_OBJECT ClassDeviceObject)
98 PDEVICE_OBJECT PortDeviceObject = NULL;
99 PFILE_OBJECT FileObject = NULL;
101 UNICODE_STRING PortName = UNICODE_STRING_INITIALIZER(L"\\Device\\Mouse");
102 IO_STATUS_BLOCK ioStatus;
105 CLASS_INFORMATION ClassInformation;
106 PDEVICE_EXTENSION DeviceExtension = ClassDeviceObject->DeviceExtension;
108 DeviceExtension->GDIInformation.CallBack = NULL;
110 // Get the port driver's DeviceObject
111 // FIXME: The name might change.. find a way to be more dynamic?
113 status = IoGetDeviceObjectPointer(&PortName, FILE_READ_ATTRIBUTES, &FileObject, &PortDeviceObject);
115 if(status != STATUS_SUCCESS)
117 DbgPrint("MOUCLASS: Could not connect to mouse port driver\n");
121 DeviceExtension->PortDeviceObject = PortDeviceObject;
122 DeviceExtension->PortData = ExAllocatePool(NonPagedPool, MOUSE_BUFFER_SIZE * sizeof(MOUSE_INPUT_DATA));
123 DeviceExtension->InputCount = 0;
124 DeviceExtension->ReadIsPending = FALSE;
126 // Connect our callback to the port driver
128 KeInitializeEvent(&event, NotificationEvent, FALSE);
130 ClassInformation.DeviceObject = ClassDeviceObject;
131 ClassInformation.CallBack = MouseClassCallBack;
133 irp = IoBuildDeviceIoControlRequest(IOCTL_INTERNAL_MOUSE_CONNECT,
134 PortDeviceObject, &ClassInformation, sizeof(CLASS_INFORMATION), NULL, 0, TRUE, &event, &ioStatus);
136 status = IoCallDriver(DeviceExtension->PortDeviceObject, irp);
138 if (status == STATUS_PENDING) {
139 KeWaitForSingleObject(&event, Suspended, KernelMode, FALSE, NULL);
141 ioStatus.Status = status;
144 return ioStatus.Status;
147 NTSTATUS STDCALL MouseClassDispatch(PDEVICE_OBJECT DeviceObject, PIRP Irp)
149 PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
152 switch (Stack->MajorFunction)
155 if (AlreadyOpened == TRUE)
157 Status = STATUS_SUCCESS;
161 Status = STATUS_SUCCESS;
162 AlreadyOpened = TRUE;
167 Status = STATUS_SUCCESS;
172 if (Stack->Parameters.Read.Length == 0) {
173 Status = STATUS_SUCCESS;
175 Status = STATUS_PENDING;
180 DbgPrint("NOT IMPLEMENTED\n");
181 Status = STATUS_NOT_IMPLEMENTED;
185 Irp->IoStatus.Status = Status;
186 Irp->IoStatus.Information = 0;
187 if (Status==STATUS_PENDING)
189 IoMarkIrpPending(Irp);
190 IoStartPacket(DeviceObject, Irp, NULL, NULL);
192 IoCompleteRequest(Irp, IO_NO_INCREMENT);
197 VOID MouseClassStartIo(PDEVICE_OBJECT DeviceObject, PIRP Irp)
199 PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
200 PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
203 if(DeviceExtension->InputCount>0)
205 // FIXME: We should not send too much input data.. depends on the max buffer size of the win32k
206 ReadSize = DeviceExtension->InputCount * sizeof(MOUSE_INPUT_DATA);
208 // Bring the PortData back to base so that it can be copied
209 DeviceExtension->PortData -= DeviceExtension->InputCount;
210 DeviceExtension->InputCount = 0;
211 DeviceExtension->ReadIsPending = FALSE;
213 RtlMoveMemory(Irp->AssociatedIrp.SystemBuffer, (PCHAR)DeviceExtension->PortData, ReadSize);
215 // Go to next packet and complete this request with STATUS_SUCCESS
216 Irp->IoStatus.Status = STATUS_SUCCESS;
218 Irp->IoStatus.Information = ReadSize;
219 Stack->Parameters.Read.Length = ReadSize;
221 IoStartNextPacket(DeviceObject, FALSE);
222 IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
224 DeviceExtension->ReadIsPending = TRUE;
228 NTSTATUS STDCALL MouseClassInternalDeviceControl(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
230 // Retrieve GDI's callback
232 PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
233 PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
236 switch(Stack->Parameters.DeviceIoControl.IoControlCode)
238 case IOCTL_INTERNAL_MOUSE_CONNECT:
240 DeviceExtension->GDIInformation =
241 *((PGDI_INFORMATION)Stack->Parameters.DeviceIoControl.Type3InputBuffer);
243 DbgPrint("MouseClassInternalDeviceControl() installed GDI callback at %p\n", DeviceExtension->GDIInformation.CallBack);
245 status = STATUS_SUCCESS;
248 case IOCTL_INTERNAL_MOUSE_DISCONNECT:
250 DeviceExtension->GDIInformation.CallBack = NULL;
252 status = STATUS_SUCCESS;
256 status = STATUS_INVALID_DEVICE_REQUEST;
260 Irp->IoStatus.Status = status;
261 if (status == STATUS_PENDING) {
262 IoMarkIrpPending(Irp);
263 IoStartPacket(DeviceObject, Irp, NULL, NULL);
265 IoCompleteRequest(Irp, IO_NO_INCREMENT);
272 DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
274 PDEVICE_OBJECT DeviceObject;
275 UNICODE_STRING DeviceName = UNICODE_STRING_INITIALIZER(L"\\Device\\MouseClass");
276 UNICODE_STRING SymlinkName = UNICODE_STRING_INITIALIZER(L"\\??\\MouseClass");
278 DriverObject->MajorFunction[IRP_MJ_CREATE] = MouseClassDispatch;
279 // DriverObject->MajorFunction[IRP_MJ_CLOSE] = MouseClassDispatch;
280 // DriverObject->MajorFunction[IRP_MJ_READ] = MouseClassDispatch;
281 DriverObject->MajorFunction[IRP_MJ_INTERNAL_DEVICE_CONTROL] = MouseClassInternalDeviceControl; // to get GDI callback
282 // DriverObject->DriverStartIo = MouseClassStartIo;
284 IoCreateDevice(DriverObject,
285 sizeof(DEVICE_EXTENSION),
291 DeviceObject->Flags = DeviceObject->Flags | DO_BUFFERED_IO;
293 IoCreateSymbolicLink(&SymlinkName, &DeviceName);
295 return ConnectMousePortDriver(DeviceObject);