reactos/drivers/input/mouclass/mouclass.c

   1 /*
   2
   3  ** Mouse class driver 0.0.1
   4  ** Written by Jason Filby (jasonfilby@yahoo.com)
   5  ** For ReactOS (www.reactos.com)
   6
   7  ** The class driver between win32k and the various mouse port drivers
   8
   9  ** TODO: Change interface to win32k to a callback instead of ReadFile IO
  10           Add support for multiple port devices
  11
  12 */
  13
  14 #include <ddk/ntddk.h>
  15 #include "../include/mouse.h"
  16 #include "mouclass.h"
  17
  18 #define NDEBUG
  19 #include <debug.h>
  20
  21 BOOLEAN AlreadyOpened = FALSE;
  22
  23 BOOLEAN MouseClassCallBack(PDEVICE_OBJECT ClassDeviceObject, PMOUSE_INPUT_DATA MouseDataStart,
  24                         PMOUSE_INPUT_DATA MouseDataEnd, PULONG InputCount)
  25 {
  26    PDEVICE_EXTENSION ClassDeviceExtension = ClassDeviceObject->DeviceExtension;
  27    PIRP Irp;
  28    ULONG ReadSize;
  29    PIO_STACK_LOCATION Stack;
  30
  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.
  34
  35 /*   if(ClassDeviceExtension->ReadIsPending == TRUE)
  36    {
  37       Irp = ClassDeviceObject->CurrentIrp;
  38       ClassDeviceObject->CurrentIrp = NULL;
  39       Stack = IoGetCurrentIrpStackLocation(Irp);
  40
  41       ReadSize = sizeof(MOUSE_INPUT_DATA) * (*InputCount);
  42
  43       // A read request is waiting for input, so go straight to it
  44       RtlMoveMemory(Irp->AssociatedIrp.SystemBuffer, (PCHAR)MouseDataStart, ReadSize);
  45
  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;
  50
  51       IoStartNextPacket(ClassDeviceObject, FALSE);
  52       IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
  53       ClassDeviceExtension->ReadIsPending = FALSE;
  54    } */
  55
  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))
  58   {
  59     if(ClassDeviceExtension->InputCount + *InputCount > MOUSE_BUFFER_SIZE)
  60     {
  61        ReadSize = MOUSE_BUFFER_SIZE - ClassDeviceExtension->InputCount;
  62     } else {
  63        ReadSize = *InputCount;
  64     }
  65
  66     // FIXME: If we exceed the buffer, mouse data gets thrown away.. better solution?
  67
  68
  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);
  72
  73     // Move the pointer and counter up
  74     ClassDeviceExtension->PortData += ReadSize;
  75     ClassDeviceExtension->InputCount += ReadSize;
  76
  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);
  82     } else {
  83           DPRINT("MouseClassCallBack() NO GDI callback installed\n");
  84         }
  85
  86     ClassDeviceExtension->PortData -= ReadSize;
  87     ClassDeviceExtension->InputCount -= ReadSize;
  88     ClassDeviceExtension->ReadIsPending = FALSE;
  89   } else {
  90     DPRINT("MouseClassCallBack() entered, InputCount = %d - DOING NOTHING\n", *InputCount);
  91   }
  92
  93   return TRUE;
  94 }
  95
  96 NTSTATUS ConnectMousePortDriver(PDEVICE_OBJECT ClassDeviceObject)
  97 {
  98    PDEVICE_OBJECT PortDeviceObject = NULL;
  99    PFILE_OBJECT FileObject = NULL;
 100    NTSTATUS status;
 101    UNICODE_STRING PortName = UNICODE_STRING_INITIALIZER(L"\\Device\\Mouse");
 102    IO_STATUS_BLOCK ioStatus;
 103    KEVENT event;
 104    PIRP irp;
 105    CLASS_INFORMATION ClassInformation;
 106    PDEVICE_EXTENSION DeviceExtension = ClassDeviceObject->DeviceExtension;
 107
 108    DeviceExtension->GDIInformation.CallBack = NULL;
 109
 110    // Get the port driver's DeviceObject
 111    // FIXME: The name might change.. find a way to be more dynamic?
 112
 113    status = IoGetDeviceObjectPointer(&PortName, FILE_READ_ATTRIBUTES, &FileObject, &PortDeviceObject);
 114
 115    if(status != STATUS_SUCCESS)
 116    {
 117       DbgPrint("MOUCLASS: Could not connect to mouse port driver\n");
 118       return status;
 119    }
 120
 121    DeviceExtension->PortDeviceObject = PortDeviceObject;
 122    DeviceExtension->PortData = ExAllocatePool(NonPagedPool, MOUSE_BUFFER_SIZE * sizeof(MOUSE_INPUT_DATA));
 123    DeviceExtension->InputCount = 0;
 124    DeviceExtension->ReadIsPending = FALSE;
 125
 126    // Connect our callback to the port driver
 127
 128    KeInitializeEvent(&event, NotificationEvent, FALSE);
 129
 130    ClassInformation.DeviceObject = ClassDeviceObject;
 131    ClassInformation.CallBack     = MouseClassCallBack;
 132
 133    irp = IoBuildDeviceIoControlRequest(IOCTL_INTERNAL_MOUSE_CONNECT,
 134       PortDeviceObject, &ClassInformation, sizeof(CLASS_INFORMATION), NULL, 0, TRUE, &event, &ioStatus);
 135
 136    status = IoCallDriver(DeviceExtension->PortDeviceObject, irp);
 137
 138    if (status == STATUS_PENDING) {
 139       KeWaitForSingleObject(&event, Suspended, KernelMode, FALSE, NULL);
 140    } else {
 141       ioStatus.Status = status;
 142    }
 143
 144    return ioStatus.Status;
 145 }
 146
 147 NTSTATUS STDCALL MouseClassDispatch(PDEVICE_OBJECT DeviceObject, PIRP Irp)
 148 {
 149    PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
 150    NTSTATUS Status;
 151
 152    switch (Stack->MajorFunction)
 153      {
 154       case IRP_MJ_CREATE:
 155         if (AlreadyOpened == TRUE)
 156           {
 157              Status = STATUS_SUCCESS;
 158           }
 159         else
 160           {
 161              Status = STATUS_SUCCESS;
 162              AlreadyOpened = TRUE;
 163           }
 164         break;
 165
 166       case IRP_MJ_CLOSE:
 167         Status = STATUS_SUCCESS;
 168         break;
 169
 170       case IRP_MJ_READ:
 171
 172        if (Stack->Parameters.Read.Length == 0) {
 173            Status = STATUS_SUCCESS;
 174         } else {
 175            Status = STATUS_PENDING;
 176         }
 177         break;
 178
 179       default:
 180         DbgPrint("NOT IMPLEMENTED\n");
 181         Status = STATUS_NOT_IMPLEMENTED;
 182         break;
 183      }
 184
 185    Irp->IoStatus.Status = Status;
 186    Irp->IoStatus.Information = 0;
 187    if (Status==STATUS_PENDING)
 188    {
 189       IoMarkIrpPending(Irp);
 190       IoStartPacket(DeviceObject, Irp, NULL, NULL);
 191    } else {
 192       IoCompleteRequest(Irp, IO_NO_INCREMENT);
 193    }
 194    return(Status);
 195 }
 196
 197 VOID MouseClassStartIo(PDEVICE_OBJECT DeviceObject, PIRP Irp)
 198 {
 199    PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
 200    PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
 201    ULONG ReadSize;
 202
 203    if(DeviceExtension->InputCount>0)
 204    {
 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);
 207
 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;
 212
 213       RtlMoveMemory(Irp->AssociatedIrp.SystemBuffer, (PCHAR)DeviceExtension->PortData, ReadSize);
 214
 215       // Go to next packet and complete this request with STATUS_SUCCESS
 216       Irp->IoStatus.Status = STATUS_SUCCESS;
 217
 218       Irp->IoStatus.Information = ReadSize;
 219       Stack->Parameters.Read.Length = ReadSize;
 220
 221       IoStartNextPacket(DeviceObject, FALSE);
 222       IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
 223    } else {
 224       DeviceExtension->ReadIsPending = TRUE;
 225    }
 226 }
 227
 228 NTSTATUS STDCALL MouseClassInternalDeviceControl(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
 229 {
 230    // Retrieve GDI's callback
 231
 232    PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
 233    PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
 234    NTSTATUS status;
 235
 236    switch(Stack->Parameters.DeviceIoControl.IoControlCode)
 237    {
 238       case IOCTL_INTERNAL_MOUSE_CONNECT:
 239
 240          DeviceExtension->GDIInformation =
 241             *((PGDI_INFORMATION)Stack->Parameters.DeviceIoControl.Type3InputBuffer);
 242
 243          DbgPrint("MouseClassInternalDeviceControl() installed GDI callback at %p\n", DeviceExtension->GDIInformation.CallBack);
 244
 245          status = STATUS_SUCCESS;
 246          break;
 247
 248       case IOCTL_INTERNAL_MOUSE_DISCONNECT:
 249
 250          DeviceExtension->GDIInformation.CallBack = NULL;
 251
 252          status = STATUS_SUCCESS;
 253          break;
 254
 255       default:
 256          status = STATUS_INVALID_DEVICE_REQUEST;
 257          break;
 258    }
 259
 260    Irp->IoStatus.Status = status;
 261    if (status == STATUS_PENDING) {
 262       IoMarkIrpPending(Irp);
 263       IoStartPacket(DeviceObject, Irp, NULL, NULL);
 264    } else {
 265       IoCompleteRequest(Irp, IO_NO_INCREMENT);
 266    }
 267
 268    return status;
 269 }
 270
 271 NTSTATUS STDCALL
 272 DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
 273 {
 274    PDEVICE_OBJECT DeviceObject;
 275    UNICODE_STRING DeviceName = UNICODE_STRING_INITIALIZER(L"\\Device\\MouseClass");
 276    UNICODE_STRING SymlinkName = UNICODE_STRING_INITIALIZER(L"\\??\\MouseClass");
 277
 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;
 283
 284    IoCreateDevice(DriverObject,
 285                   sizeof(DEVICE_EXTENSION),
 286                   &DeviceName,
 287                   FILE_DEVICE_MOUSE,
 288                   0,
 289                   TRUE,
 290                   &DeviceObject);
 291    DeviceObject->Flags = DeviceObject->Flags | DO_BUFFERED_IO;
 292
 293    IoCreateSymbolicLink(&SymlinkName, &DeviceName);
 294
 295    return ConnectMousePortDriver(DeviceObject);
 296 }