audk/DynamicTablesPkg/Drivers/DynamicTableFactoryDxe/SmbiosTableFactory/SmbiosTableFactory.c

/** @file
  SMBIOS Table Factory

  Copyright (c) 2017 - 2019, ARM Limited. All rights reserved.

  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.

  @par Glossary:
    - Std - Standard
**/

#include <IndustryStandard/SmBios.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>

// Module specific include files.
#include <SmbiosTableGenerator.h>
#include <ConfigurationManagerObject.h>
#include <Protocol/ConfigurationManagerProtocol.h>
#include <Protocol/DynamicTableFactoryProtocol.h>

#include "DynamicTableFactory.h"

extern EDKII_DYNAMIC_TABLE_FACTORY_INFO TableFactoryInfo;

/** Return a pointer to the SMBIOS table generator.

  @param [in]  This         Pointer to the Dynamic Table Factory Protocol.
  @param [in]  GeneratorId  The SMBIOS table generator ID for the
                            requested generator.
  @param [out] Generator    Pointer to the requested SMBIOS table
                            generator.

  @retval EFI_SUCCESS           Success.
  @retval EFI_INVALID_PARAMETER A parameter is invalid.
  @retval EFI_NOT_FOUND         The requested generator is not found
                                in the list of registered generators.
**/
EFI_STATUS
EFIAPI
GetSmbiosTableGenerator (
  IN  CONST EDKII_DYNAMIC_TABLE_FACTORY_PROTOCOL  * CONST This,
  IN  CONST SMBIOS_TABLE_GENERATOR_ID                     GeneratorId,
  OUT CONST SMBIOS_TABLE_GENERATOR               ** CONST Generator
  )
{
  UINT16                             TableId;
  EDKII_DYNAMIC_TABLE_FACTORY_INFO * FactoryInfo;

  ASSERT (This != NULL);

  FactoryInfo = This->TableFactoryInfo;

  if (Generator == NULL) {
    DEBUG ((DEBUG_ERROR, "ERROR: Invalid Generator pointer\n"));
    return EFI_INVALID_PARAMETER;
  }

  if (!IS_GENERATOR_TYPE_SMBIOS (GeneratorId)) {
    DEBUG ((DEBUG_ERROR, "ERROR: Generator Type is not SMBIOS\n"));
    return EFI_INVALID_PARAMETER;
  }

  *Generator = NULL;
  TableId = GET_TABLE_ID (GeneratorId);
  if (IS_GENERATOR_NAMESPACE_STD (GeneratorId)) {
    if (TableId >= EStdSmbiosTableIdMax) {
      ASSERT (TableId < EStdSmbiosTableIdMax);
      return EFI_INVALID_PARAMETER;
    }
    if (FactoryInfo->StdSmbiosTableGeneratorList[TableId] != NULL) {
      *Generator = FactoryInfo->StdSmbiosTableGeneratorList[TableId];
    } else {
      return EFI_NOT_FOUND;
    }
  } else {
    if (TableId > FixedPcdGet16 (PcdMaxCustomSMBIOSGenerators)) {
      ASSERT (TableId <= FixedPcdGet16 (PcdMaxCustomSMBIOSGenerators));
      return EFI_INVALID_PARAMETER;
    }
    if (FactoryInfo->CustomSmbiosTableGeneratorList[TableId] != NULL) {
      *Generator = FactoryInfo->CustomSmbiosTableGeneratorList[TableId];
    } else {
      return EFI_NOT_FOUND;
    }
  }
  return EFI_SUCCESS;
}

/** Register SMBIOS table factory generator.

  The SMBIOS table factory maintains a list of the Standard and OEM SMBIOS
  table generators.

  @param [in]  Generator       Pointer to the SMBIOS table generator.

  @retval EFI_SUCCESS           The Generator was registered
                                successfully.
  @retval EFI_INVALID_PARAMETER The Generator ID is invalid or
                                the Generator pointer is NULL.
  @retval EFI_ALREADY_STARTED   The Generator for the Table ID is
                                already registered.
**/
EFI_STATUS
EFIAPI
RegisterSmbiosTableGenerator (
  IN  CONST SMBIOS_TABLE_GENERATOR              * CONST Generator
  )
{
  UINT16  TableId;

  if (Generator == NULL) {
    DEBUG ((DEBUG_ERROR, "ERROR: SMBIOS register - Invalid Generator\n"));
    return EFI_INVALID_PARAMETER;
  }

  if (!IS_GENERATOR_TYPE_SMBIOS (Generator->GeneratorID)) {
    DEBUG ((
      DEBUG_ERROR,
      "ERROR: SMBIOS register - Generator" \
      " Type is not SMBIOS\n"
      ));
    return EFI_INVALID_PARAMETER;
  }

  DEBUG ((DEBUG_INFO, "Registering %s\n", Generator->Description));

  TableId = GET_TABLE_ID (Generator->GeneratorID);
  if (IS_GENERATOR_NAMESPACE_STD (Generator->GeneratorID)) {
    if (TableId >= EStdSmbiosTableIdMax) {
      ASSERT (TableId < EStdSmbiosTableIdMax);
      return EFI_INVALID_PARAMETER;
    }
    if (TableFactoryInfo.StdSmbiosTableGeneratorList[TableId] == NULL) {
      TableFactoryInfo.StdSmbiosTableGeneratorList[TableId] = Generator;
    } else {
      return EFI_ALREADY_STARTED;
    }
  } else {
    if (TableId > FixedPcdGet16 (PcdMaxCustomSMBIOSGenerators)) {
      ASSERT (TableId <= FixedPcdGet16 (PcdMaxCustomSMBIOSGenerators));
      return EFI_INVALID_PARAMETER;
    }
    if (TableFactoryInfo.CustomSmbiosTableGeneratorList[TableId] == NULL) {
      TableFactoryInfo.CustomSmbiosTableGeneratorList[TableId] = Generator;
    } else {
      return EFI_ALREADY_STARTED;
    }
  }
  return EFI_SUCCESS;
}

/** Deregister SMBIOS generator.

  This function is called by the SMBIOS table generator to deregister itself
  from the SMBIOS table factory.

  @param [in]  Generator       Pointer to the SMBIOS table generator.

  @retval EFI_SUCCESS           Success.
  @retval EFI_INVALID_PARAMETER The generator is invalid.
  @retval EFI_NOT_FOUND         The requested generator is not found
                                in the list of registered generators.
**/
EFI_STATUS
EFIAPI
DeregisterSmbiosTableGenerator (
  IN  CONST SMBIOS_TABLE_GENERATOR              * CONST Generator
  )
{
  UINT16  TableId;

  if (Generator == NULL) {
    DEBUG ((DEBUG_ERROR, "ERROR: SMBIOS deregister - Invalid Generator\n"));
    return EFI_INVALID_PARAMETER;
  }

  if (!IS_GENERATOR_TYPE_SMBIOS (Generator->GeneratorID)) {
    DEBUG ((
      DEBUG_ERROR,
      "ERROR: SMBIOS deregister - Generator" \
      " Type is not SMBIOS\n"
      ));
    return EFI_INVALID_PARAMETER;
  }

  TableId = GET_TABLE_ID (Generator->GeneratorID);
  if (IS_GENERATOR_NAMESPACE_STD (Generator->GeneratorID)) {
    if (TableId >= EStdSmbiosTableIdMax) {
      ASSERT (TableId < EStdSmbiosTableIdMax);
      return EFI_INVALID_PARAMETER;
    }
    if (TableFactoryInfo.StdSmbiosTableGeneratorList[TableId] != NULL) {
      if (Generator != TableFactoryInfo.StdSmbiosTableGeneratorList[TableId]) {
        return EFI_INVALID_PARAMETER;
      }
      TableFactoryInfo.StdSmbiosTableGeneratorList[TableId] = NULL;
    } else {
      return EFI_NOT_FOUND;
    }
  } else {
    if (TableId > FixedPcdGet16 (PcdMaxCustomSMBIOSGenerators)) {
      ASSERT (TableId <= FixedPcdGet16 (PcdMaxCustomSMBIOSGenerators));
      return EFI_INVALID_PARAMETER;
    }
    if (TableFactoryInfo.CustomSmbiosTableGeneratorList[TableId] != NULL) {
      if (Generator !=
          TableFactoryInfo.CustomSmbiosTableGeneratorList[TableId]) {
        return EFI_INVALID_PARAMETER;
      }
      TableFactoryInfo.CustomSmbiosTableGeneratorList[TableId] = NULL;
    } else {
      return EFI_NOT_FOUND;
    }
  }

  DEBUG ((DEBUG_INFO, "Deregistering %s\n", Generator->Description));
  return EFI_SUCCESS;
}