routintf.c File Reference

#include <pci.h>
#include <debug.h>

Include dependency graph for routintf.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
NTSTATUS NTAPI	routeintrf_Initializer (IN PVOID Instance)
NTSTATUS NTAPI	routeintrf_Constructor (IN PVOID DeviceExtension, IN PVOID Instance, IN PVOID InterfaceData, IN USHORT Version, IN USHORT Size, IN PINTERFACE Interface)
NTSTATUS NTAPI	PciCacheLegacyDeviceRouting (IN PDEVICE_OBJECT DeviceObject, IN ULONG BusNumber, IN ULONG SlotNumber, IN UCHAR InterruptLine, IN UCHAR InterruptPin, IN UCHAR BaseClass, IN UCHAR SubClass, IN PDEVICE_OBJECT PhysicalDeviceObject, IN PPCI_PDO_EXTENSION PdoExtension, OUT PDEVICE_OBJECT *pFoundDeviceObject)

Variables
PPCI_LEGACY_DEVICE	PciLegacyDeviceHead
PCI_INTERFACE	PciRoutingInterface

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 13 of file routintf.c.

Function Documentation

PciCacheLegacyDeviceRouting()

NTSTATUS NTAPI PciCacheLegacyDeviceRouting	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	BusNumber,
		IN ULONG	SlotNumber,
		IN UCHAR	InterruptLine,
		IN UCHAR	InterruptPin,
		IN UCHAR	BaseClass,
		IN UCHAR	SubClass,
		IN PDEVICE_OBJECT	PhysicalDeviceObject,
		IN PPCI_PDO_EXTENSION	PdoExtension,
		OUT PDEVICE_OBJECT *	pFoundDeviceObject
	)

Definition at line 70 of file routintf.c.

{
    PPCI_LEGACY_DEVICE *Link;
    PPCI_LEGACY_DEVICE LegacyDevice;
    PDEVICE_OBJECT FoundDeviceObject;
    PAGED_CODE();
 
    /* Scan current registered devices */
    LegacyDevice = PciLegacyDeviceHead;
    Link = &PciLegacyDeviceHead;
    while (LegacyDevice)
    {
        /* Find a match */
        if ((BusNumber == LegacyDevice->BusNumber) &&
            (SlotNumber == LegacyDevice->SlotNumber))
        {
            /* We already know about this routing */
            break;
        }
 
        /* We know about device already, but for a different location */
        if (LegacyDevice->DeviceObject == DeviceObject)
        {
            /* Free the existing structure, move to the next one */
            *Link = LegacyDevice->Next;
            ExFreePoolWithTag(LegacyDevice, 0);
            LegacyDevice = *Link;
        }
        else
        {
            /* Keep going */
            Link = &LegacyDevice->Next;
            LegacyDevice = LegacyDevice->Next;
        }
    }
 
    /* Did we find a match? */
    if (!LegacyDevice)
    {
        /* Allocate a new cache structure */
        LegacyDevice = ExAllocatePoolWithTag(PagedPool,
                                             sizeof(PCI_LEGACY_DEVICE),
                                             'PciR');
        if (!LegacyDevice) return STATUS_INSUFFICIENT_RESOURCES;
 
        /* Save all the data in it */
        RtlZeroMemory(LegacyDevice, sizeof(PCI_LEGACY_DEVICE));
        LegacyDevice->BusNumber = BusNumber;
        LegacyDevice->SlotNumber = SlotNumber;
        LegacyDevice->InterruptLine = InterruptLine;
        LegacyDevice->InterruptPin = InterruptPin;
        LegacyDevice->BaseClass = BaseClass;
        LegacyDevice->SubClass = SubClass;
        LegacyDevice->PhysicalDeviceObject = PhysicalDeviceObject;
        LegacyDevice->DeviceObject = DeviceObject;
        LegacyDevice->PdoExtension = PdoExtension;
 
        /* Link it in the list */
        LegacyDevice->Next = PciLegacyDeviceHead;
        PciLegacyDeviceHead = LegacyDevice;
    }
 
    /* Check if we found, or created, a matching caching structure */
    FoundDeviceObject = LegacyDevice->DeviceObject;
    if (FoundDeviceObject == DeviceObject)
    {
        /* Return the device object and success */
        if (pFoundDeviceObject) *pFoundDeviceObject = DeviceObject;
        return STATUS_SUCCESS;
    }
 
    /* Otherwise, this is a new device object for this location */
    LegacyDevice->DeviceObject = DeviceObject;
    if (pFoundDeviceObject) *pFoundDeviceObject = FoundDeviceObject;
    return STATUS_SUCCESS;
}

Referenced by PciAssignSlotResources().

routeintrf_Constructor()

NTSTATUS NTAPI routeintrf_Constructor	(	IN PVOID	DeviceExtension,
		IN PVOID	Instance,
		IN PVOID	InterfaceData,
		IN USHORT	Version,
		IN USHORT	Size,
		IN PINTERFACE	Interface
	)

Definition at line 47 of file routintf.c.

{
    UNREFERENCED_PARAMETER(DeviceExtension);
    UNREFERENCED_PARAMETER(Instance);
    UNREFERENCED_PARAMETER(InterfaceData);
    UNREFERENCED_PARAMETER(Size);
    UNREFERENCED_PARAMETER(Interface);
 
    /* Only version 1 is supported */
    if (Version != PCI_INT_ROUTE_INTRF_STANDARD_VER) return STATUS_NOINTERFACE;
 
    /* Not yet implemented */
    UNIMPLEMENTED_DBGBREAK();
    return STATUS_NOT_IMPLEMENTED;
}

routeintrf_Initializer()

NTSTATUS NTAPI routeintrf_Initializer

(

IN PVOID

Instance

)

Definition at line 37 of file routintf.c.

{
    UNREFERENCED_PARAMETER(Instance);
    /* PnP Interfaces don't get Initialized */
    ASSERTMSG("PCI routeintrf_Initializer, unexpected call.\n", FALSE);
    return STATUS_UNSUCCESSFUL;
}

Variable Documentation

PciLegacyDeviceHead

PPCI_LEGACY_DEVICE PciLegacyDeviceHead

Definition at line 18 of file routintf.c.

Referenced by PciCacheLegacyDeviceRouting().

PciRoutingInterface

PCI_INTERFACE PciRoutingInterface

Initial value:

=
{
    &GUID_INT_ROUTE_INTERFACE_STANDARD,
    sizeof(INT_ROUTE_INTERFACE_STANDARD),
    PCI_INT_ROUTE_INTRF_STANDARD_VER,
    PCI_INT_ROUTE_INTRF_STANDARD_VER,
    PCI_INTERFACE_FDO,
    0,
    PciInterface_IntRouteHandler,
    routeintrf_Constructor,
    routeintrf_Initializer
}

Definition at line 20 of file routintf.c.