interrupt.c

来自「ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机」· C语言 代码 · 共 146 行

/*
 * VideoPort driver
 *
 * Copyright (C) 2002, 2003, 2004 ReactOS Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; see the file COPYING.LIB.
 * If not, write to the Free Software Foundation,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * $Id: interrupt.c 21844 2006-05-07 19:34:23Z ion $
 */

#include "videoprt.h"

/* PRIVATE FUNCTIONS **********************************************************/

BOOLEAN NTAPI
IntVideoPortInterruptRoutine(
   IN struct _KINTERRUPT *Interrupt,
   IN PVOID ServiceContext)
{
   PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension = ServiceContext;

   ASSERT(DeviceExtension->DriverExtension->InitializationData.HwInterrupt != NULL);

   return DeviceExtension->DriverExtension->InitializationData.HwInterrupt(
      &DeviceExtension->MiniPortDeviceExtension);
}

BOOLEAN NTAPI
IntVideoPortSetupInterrupt(
   IN PDEVICE_OBJECT DeviceObject,
   IN PVIDEO_PORT_DRIVER_EXTENSION DriverExtension,
   IN PVIDEO_PORT_CONFIG_INFO ConfigInfo)
{
   NTSTATUS Status;
   PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;

   DeviceExtension = (PVIDEO_PORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension;

   if (ConfigInfo->BusInterruptVector == 0)
      ConfigInfo->BusInterruptVector = DeviceExtension->InterruptVector;

   if (ConfigInfo->BusInterruptLevel == 0)
      ConfigInfo->BusInterruptLevel = DeviceExtension->InterruptLevel;

   if (DriverExtension->InitializationData.HwInterrupt != NULL)
   {
      ULONG InterruptVector;
      KIRQL Irql;
      KAFFINITY Affinity;

      InterruptVector = HalGetInterruptVector(
         ConfigInfo->AdapterInterfaceType,
         ConfigInfo->SystemIoBusNumber,
         ConfigInfo->BusInterruptLevel,
         ConfigInfo->BusInterruptVector,
         &Irql,
         &Affinity);

      if (InterruptVector == 0)
      {
         DPRINT("HalGetInterruptVector failed\n");
         return FALSE;
      }

      KeInitializeSpinLock(&DeviceExtension->InterruptSpinLock);
      Status = IoConnectInterrupt(
         &DeviceExtension->InterruptObject,
         IntVideoPortInterruptRoutine,
         DeviceExtension,
         &DeviceExtension->InterruptSpinLock,
         InterruptVector,
         Irql,
         Irql,
         ConfigInfo->InterruptMode,
         DeviceExtension->InterruptShared,
         Affinity,
         FALSE);

      if (!NT_SUCCESS(Status))
      {
         DPRINT("IoConnectInterrupt failed with status 0x%08x\n", Status);
         return FALSE;
      }
   }

   return TRUE;
}

/* PUBLIC FUNCTIONS ***********************************************************/

/*
 * @implemented
 */

VP_STATUS NTAPI
VideoPortEnableInterrupt(IN PVOID HwDeviceExtension)
{
   PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
   BOOLEAN Status;

   DPRINT("VideoPortEnableInterrupt\n");

   DeviceExtension = VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension);

   Status = HalEnableSystemInterrupt(
      DeviceExtension->InterruptVector,
      0,
      DeviceExtension->InterruptLevel);

   return Status ? NO_ERROR : ERROR_INVALID_ACCESS;
}

/*
 * @implemented
 */

VP_STATUS NTAPI
VideoPortDisableInterrupt(IN PVOID HwDeviceExtension)
{
   PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
   BOOLEAN Status;

   DPRINT("VideoPortDisableInterrupt\n");

   DeviceExtension = VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension);

   Status = HalDisableSystemInterrupt(
      DeviceExtension->InterruptVector,
      0);

   return Status ? NO_ERROR : ERROR_INVALID_ACCESS;
}