audk/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h

/** @file
  Internal library declaration for PCI Bus module.

Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _EFI_PCI_LIB_H_
#define _EFI_PCI_LIB_H_


typedef struct {
  EFI_HANDLE            Handle;
} EFI_DEVICE_HANDLE_EXTENDED_DATA_PAYLOAD;

typedef struct {
  UINT32                             Bar;
  UINT16                             DevicePathSize;
  UINT16                             ReqResSize;
  UINT16                             AllocResSize;
  UINT8                              *DevicePath;
  UINT8                              *ReqRes;
  UINT8                              *AllocRes;
} EFI_RESOURCE_ALLOC_FAILURE_ERROR_DATA_PAYLOAD;


/**
  Retrieve the PCI Card device BAR information via PciIo interface.

  @param PciIoDevice        PCI Card device instance.

**/
VOID
GetBackPcCardBar (
  IN  PCI_IO_DEVICE                  *PciIoDevice
  );

/**
  Remove rejected pci device from specific root bridge
  handle.

  @param RootBridgeHandle  Specific parent root bridge handle.
  @param Bridge            Bridge device instance.

**/
VOID
RemoveRejectedPciDevices (
  IN EFI_HANDLE        RootBridgeHandle,
  IN PCI_IO_DEVICE     *Bridge
  );

/**
  Submits the I/O and memory resource requirements for the specified PCI Host Bridge.

  @param PciResAlloc  Point to protocol instance of EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL.

  @retval EFI_SUCCESS           Successfully finished resource allocation.
  @retval EFI_NOT_FOUND         Cannot get root bridge instance.
  @retval EFI_OUT_OF_RESOURCES  Platform failed to program the resources if no hot plug supported.
  @retval other                 Some error occurred when allocating resources for the PCI Host Bridge.

  @note   Feature flag PcdPciBusHotplugDeviceSupport determine whether need support hotplug.

**/
EFI_STATUS
PciHostBridgeResourceAllocator (
  IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc
  );

/**
  Allocate NumberOfBuses buses and return the next available PCI bus number.

  @param  Bridge           Bridge device instance.
  @param  StartBusNumber   Current available PCI bus number.
  @param  NumberOfBuses    Number of buses enumerated below the StartBusNumber.
  @param  NextBusNumber    Next available PCI bus number.

  @retval EFI_SUCCESS           Available bus number resource is enough. Next available PCI bus number
                                is returned in NextBusNumber.
  @retval EFI_OUT_OF_RESOURCES  Available bus number resource is not enough for allocation.

**/
EFI_STATUS
PciAllocateBusNumber (
  IN PCI_IO_DEVICE                      *Bridge,
  IN UINT8                              StartBusNumber,
  IN UINT8                              NumberOfBuses,
  OUT UINT8                             *NextBusNumber
  );

/**
  Scan pci bus and assign bus number to the given PCI bus system.

  @param  Bridge           Bridge device instance.
  @param  StartBusNumber   start point.
  @param  SubBusNumber     Point to sub bus number.
  @param  PaddedBusRange   Customized bus number.

  @retval EFI_SUCCESS      Successfully scanned and assigned bus number.
  @retval other            Some error occurred when scanning pci bus.

  @note   Feature flag PcdPciBusHotplugDeviceSupport determine whether need support hotplug.

**/
EFI_STATUS
PciScanBus (
  IN PCI_IO_DEVICE                      *Bridge,
  IN UINT8                              StartBusNumber,
  OUT UINT8                             *SubBusNumber,
  OUT UINT8                             *PaddedBusRange
  );

/**
  Process Option Rom on the specified root bridge.

  @param Bridge  Pci root bridge device instance.

  @retval EFI_SUCCESS   Success process.
  @retval other         Some error occurred when processing Option Rom on the root bridge.

**/
EFI_STATUS
PciRootBridgeP2CProcess (
  IN PCI_IO_DEVICE *Bridge
  );

/**
  Process Option Rom on the specified host bridge.

  @param PciResAlloc    Pointer to instance of EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL.

  @retval EFI_SUCCESS   Success process.
  @retval EFI_NOT_FOUND Can not find the root bridge instance.
  @retval other         Some error occurred when processing Option Rom on the host bridge.

**/
EFI_STATUS
PciHostBridgeP2CProcess (
  IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc
  );

/**
  This function is used to enumerate the entire host bridge
  in a given platform.

  @param PciResAlloc   A pointer to the PCI Host Resource Allocation protocol.

  @retval EFI_SUCCESS            Successfully enumerated the host bridge.
  @retval EFI_OUT_OF_RESOURCES   No enough memory available.
  @retval other                  Some error occurred when enumerating the host bridge.

**/
EFI_STATUS
PciHostBridgeEnumerator (
  IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL  *PciResAlloc
  );

#endif