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163 lines
4.7 KiB
163 lines
4.7 KiB
/*++
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Copyright (c) 1994 Microsoft Corporation
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Module Name:
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dispatch.c
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Abstract:
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This module contains the global dispatch related
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routines for the pcmcia controller & it's child devices
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Author:
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Ravisankar Pudipeddi (ravisp) 11/1/96
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Environment:
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Kernel mode
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Revision History :
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--*/
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#include "pch.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, PcmciaInitDeviceDispatchTable)
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#endif
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//
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// Dispatch table array for FDOs/PDOs
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//
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PDRIVER_DISPATCH DeviceObjectDispatch[sizeof(DEVICE_OBJECT_TYPE)][IRP_MJ_MAXIMUM_FUNCTION + 1];
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VOID
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PcmciaInitDeviceDispatchTable(
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IN PDRIVER_OBJECT DriverObject
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)
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/*++
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Routine Description:
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Initializes the IRP dispatch tables for Pdo's & Fdo's
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Arguments:
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None
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Return value:
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None
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--*/
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{
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ULONG i;
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PAGED_CODE();
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//
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// Init the controller (FDO) dispatch table
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//
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DeviceObjectDispatch[FDO][IRP_MJ_CREATE] = PcmciaOpenCloseDispatch;
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DeviceObjectDispatch[FDO][IRP_MJ_CLOSE] = PcmciaOpenCloseDispatch;
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DeviceObjectDispatch[FDO][IRP_MJ_CLEANUP]= PcmciaCleanupDispatch;
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DeviceObjectDispatch[FDO][IRP_MJ_DEVICE_CONTROL] = PcmciaDeviceControl;
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DeviceObjectDispatch[FDO][IRP_MJ_SYSTEM_CONTROL] = PcmciaFdoSystemControl;
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DeviceObjectDispatch[FDO][IRP_MJ_PNP] = PcmciaFdoPnpDispatch;
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DeviceObjectDispatch[FDO][IRP_MJ_POWER] = PcmciaFdoPowerDispatch;
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//
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// Init the PDO dispatch table
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//
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DeviceObjectDispatch[PDO][IRP_MJ_DEVICE_CONTROL] = PcmciaPdoDeviceControl;
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DeviceObjectDispatch[PDO][IRP_MJ_SYSTEM_CONTROL] = PcmciaPdoSystemControl;
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DeviceObjectDispatch[PDO][IRP_MJ_PNP] = PcmciaPdoPnpDispatch;
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DeviceObjectDispatch[PDO][IRP_MJ_POWER] = PcmciaPdoPowerDispatch;
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//
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// Set the global dispatch table
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DriverObject->MajorFunction[IRP_MJ_CREATE] = PcmciaDispatch;
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = PcmciaDispatch;
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DriverObject->MajorFunction[IRP_MJ_CLEANUP] = PcmciaDispatch;
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DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = PcmciaDispatch;
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DriverObject->MajorFunction[IRP_MJ_SYSTEM_CONTROL] = PcmciaDispatch;
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DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = PcmciaDispatch;
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DriverObject->MajorFunction[IRP_MJ_PNP] = PcmciaDispatch;
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DriverObject->MajorFunction[IRP_MJ_POWER] = PcmciaDispatch;
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}
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NTSTATUS
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PcmciaDispatch(
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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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Routine Description:
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Dispatch routine for all IRPs handled by this driver. This dispatch would then
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call the appropriate real dispatch routine which corresponds to the device object
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type (physical or functional).
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Arguments:
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DeviceObject - Pointer to the device object this dispatch is intended for
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Irp - Pointer to the IRP to be handled
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Return value:
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Returns the status from the 'real' dispatch routine which handles this IRP
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--*/
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{
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PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
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NTSTATUS status;
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DEVICE_OBJECT_TYPE devtype = IS_PDO(DeviceObject) ? PDO : FDO;
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UCHAR MajorFunction = irpStack->MajorFunction;
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if ((MajorFunction > IRP_MJ_MAXIMUM_FUNCTION) ||
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(DeviceObjectDispatch[devtype][MajorFunction] == NULL)) {
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DebugPrint((PCMCIA_DEBUG_INFO, "PCMCIA: Dispatch skipping unimplemented Irp MJ function %x\n", MajorFunction));
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status = Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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} else if (((devtype == PDO) && IsDeviceDeleted((PPDO_EXTENSION)DeviceObject->DeviceExtension)) ||
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((devtype == FDO) && IsDeviceDeleted((PFDO_EXTENSION)DeviceObject->DeviceExtension))) {
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//
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// This do was supposed to have been already deleted
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// so we don't support any IRPs on it
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//
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DebugPrint((PCMCIA_DEBUG_INFO, "PCMCIA: Dispatch skipping Irp on deleted DO %08x MJ function %x\n", DeviceObject, MajorFunction));
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if (MajorFunction == IRP_MJ_POWER) {
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PoStartNextPowerIrp(Irp);
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}
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status = Irp->IoStatus.Status = STATUS_DELETE_PENDING;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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} else if (((KeGetCurrentIrql() == DISPATCH_LEVEL) && (MajorFunction != IRP_MJ_POWER)) ||
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(KeGetCurrentIrql() > DISPATCH_LEVEL)) {
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//
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// This is too high an IRQL to handle
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//
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if (MajorFunction == IRP_MJ_POWER) {
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PoStartNextPowerIrp(Irp);
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}
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status = Irp->IoStatus.Status = STATUS_UNSUCCESSFUL;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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} else {
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//
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// Dispatch the irp
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//
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status = ((*DeviceObjectDispatch[devtype][MajorFunction])(DeviceObject, Irp));
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}
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return status;
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}
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