DynamicTablesPkg/Include/Library/SsdtPcieSupportLib.h

/** @file
  Ssdt PCIe Support Library

  Copyright (c) 2021 - 2022, Arm Limited. All rights reserved.<BR>

  SPDX-License-Identifier: BSD-2-Clause-Patent
**/

#ifndef SSDT_PCIE_SUPPORT_LIB_H_
#define SSDT_PCIE_SUPPORT_LIB_H_

#pragma pack(1)

/** Structure used to map integer to an index.
*/
typedef struct MappingTable {
  /// Mapping table.
  /// Contains the Index <-> integer mapping
  UINT32    *Table;

  /// Last used index of the Table.
  /// Bound by MaxIndex.
  UINT32    LastIndex;

  /// Number of entries in the Table.
  UINT32    MaxIndex;
} MAPPING_TABLE;

#pragma pack()

/** Add an _OSC template method to the PciNode.

  The _OSC method is provided as an AML blob. The blob is
  parsed and attached at the end of the PciNode list of variable elements.

  @param [in]       PciInfo     Pci device information.
  @param [in, out]  PciNode     Pci node to amend.

  @retval EFI_SUCCESS             The function completed successfully.
  @retval EFI_INVALID_PARAMETER   Invalid parameter.
  @retval EFI_OUT_OF_RESOURCES    Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AddOscMethod (
  IN      CONST CM_ARM_PCI_CONFIG_SPACE_INFO  *PciInfo,
  IN  OUT   AML_OBJECT_NODE_HANDLE            PciNode
  );

/** Generate Pci slots devices.

  PCI Firmware Specification - Revision 3.3,
  s4.8 "Generic ACPI PCI Slot Description" requests to describe the PCI slot
  used. It should be possible to enumerate them, but this is additional
  information.

  @param [in]       PciInfo       Pci device information.
  @param [in]       MappingTable  The mapping table structure.
  @param [in]       Uid           Unique Id of the Pci device.
  @param [in, out]  PciNode       Pci node to amend.

  @retval EFI_SUCCESS            Success.
  @retval EFI_INVALID_PARAMETER  Invalid parameter.
  @retval EFI_OUT_OF_RESOURCES   Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
GeneratePciSlots (
  IN      CONST CM_ARM_PCI_CONFIG_SPACE_INFO  *PciInfo,
  IN      CONST MAPPING_TABLE                 *MappingTable,
  IN            UINT32                        Uid,
  IN  OUT       AML_OBJECT_NODE_HANDLE        PciNode
  );

#endif // SSDT_PCIE_SUPPORT_LIB_H_