mirror of
https://github.com/reactos/reactos.git
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152 lines
5.2 KiB
C
152 lines
5.2 KiB
C
/*
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* PROJECT: ReactOS PCI Bus Driver
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: drivers/bus/pci/intrface/intrface.c
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* PURPOSE: Common Interface Support Routines
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#include <pci.h>
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS ********************************************************************/
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PPCI_INTERFACE PciInterfaces[] =
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{
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&ArbiterInterfaceBusNumber,
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&ArbiterInterfaceMemory,
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&ArbiterInterfaceIo,
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&BusHandlerInterface,
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&PciRoutingInterface,
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&PciCardbusPrivateInterface,
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&PciLegacyDeviceDetectionInterface,
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&PciPmeInterface,
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&PciDevicePresentInterface,
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// &PciNativeIdeInterface,
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&PciLocationInterface,
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&AgpTargetInterface,
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NULL
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};
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PPCI_INTERFACE PciInterfacesLastResort[] =
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{
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&TranslatorInterfaceInterrupt,
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NULL
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};
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/* FUNCTIONS ******************************************************************/
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NTSTATUS
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NTAPI
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PciQueryInterface(IN PPCI_FDO_EXTENSION DeviceExtension,
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IN CONST GUID* InterfaceType,
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IN ULONG Size,
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IN ULONG Version,
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IN PVOID InterfaceData,
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IN PINTERFACE Interface,
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IN BOOLEAN LastChance)
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{
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UNICODE_STRING GuidString;
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NTSTATUS Status;
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PPCI_INTERFACE *InterfaceList;
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PPCI_INTERFACE PciInterface;
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RtlStringFromGUID(InterfaceType, &GuidString);
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DPRINT1("PCI - PciQueryInterface TYPE = %wZ\n", &GuidString);
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RtlFreeUnicodeString(&GuidString);
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DPRINT1(" Size = %u, Version = %u, InterfaceData = %p, LastChance = %s\n",
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Size,
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Version,
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InterfaceData,
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LastChance ? "TRUE" : "FALSE");
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/* Loop all the available interfaces */
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for (InterfaceList = LastChance ? PciInterfacesLastResort : PciInterfaces;
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*InterfaceList;
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InterfaceList++)
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{
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/* Get the current interface */
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PciInterface = *InterfaceList;
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/* For debugging, construct the GUID string */
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RtlStringFromGUID(PciInterface->InterfaceType, &GuidString);
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/* Check if this is an FDO or PDO */
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if (DeviceExtension->ExtensionType == PciFdoExtensionType)
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{
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/* Check if the interface is for FDOs */
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if (!(PciInterface->Flags & PCI_INTERFACE_FDO))
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{
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/* This interface is not for FDOs, skip it */
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DPRINT1("PCI - PciQueryInterface: guid = %wZ only for FDOs\n",
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&GuidString);
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RtlFreeUnicodeString(&GuidString);
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continue;
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}
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/* Check if the interface is for root FDO only */
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if ((PciInterface->Flags & PCI_INTERFACE_ROOT) &&
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(!PCI_IS_ROOT_FDO(DeviceExtension)))
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{
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/* This FDO isn't the root, skip the interface */
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DPRINT1("PCI - PciQueryInterface: guid = %wZ only for ROOT\n",
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&GuidString);
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RtlFreeUnicodeString(&GuidString);
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continue;
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}
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}
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else
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{
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/* This is a PDO, check if the interface is for PDOs too */
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if (!(PciInterface->Flags & PCI_INTERFACE_PDO))
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{
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/* It isn't, skip it */
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DPRINT1("PCI - PciQueryInterface: guid = %wZ only for PDOs\n",
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&GuidString);
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RtlFreeUnicodeString(&GuidString);
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continue;
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}
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}
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/* Print the GUID for debugging, and then free the string */
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DPRINT1("PCI - PciQueryInterface looking at guid = %wZ\n", &GuidString);
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RtlFreeUnicodeString(&GuidString);
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/* Check if the GUID, version, and size all match */
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if ((IsEqualGUIDAligned(PciInterface->InterfaceType, InterfaceType)) &&
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(Version >= PciInterface->MinVersion) &&
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(Version <= PciInterface->MaxVersion) &&
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(Size >= PciInterface->MinSize))
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{
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/* Call the interface's constructor */
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Status = PciInterface->Constructor(DeviceExtension,
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PciInterface,
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InterfaceData,
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Version,
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Size,
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Interface);
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if (!NT_SUCCESS(Status))
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{
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/* This interface was not initialized correctly, skip it */
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DPRINT1("PCI - PciQueryInterface - Constructor %p = %08lx\n",
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PciInterface->Constructor, Status);
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continue;
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}
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/* Reference the interface and return success, all is good */
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Interface->InterfaceReference(Interface->Context);
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DPRINT1("PCI - PciQueryInterface returning SUCCESS\n");
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return Status;
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}
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}
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/* An interface of this type, and for this device, could not be found */
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DPRINT1("PCI - PciQueryInterface FAILED TO FIND INTERFACE\n");
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return STATUS_NOT_SUPPORTED;
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}
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/* EOF */
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