path: root/ShellPkg/Library/UefiShellDebug1CommandsLib/SmbiosView/LibSmbiosView.c

/** @file
  API for SMBIOS table.

  Copyright (c) 2005 - 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.

**/
    

#include "../UefiShellDebug1CommandsLib.h"
#include <Guid/SmBios.h>
#include "LibSmbios.h"
#include "LibSmbiosView.h"
#include "SmbiosView.h"

STATIC UINT8                    mInit         = 0;
STATIC SMBIOS_STRUCTURE_TABLE   *mSmbiosTable = NULL;
STATIC SMBIOS_STRUCTURE_POINTER m_SmbiosStruct;
STATIC SMBIOS_STRUCTURE_POINTER *mSmbiosStruct = &m_SmbiosStruct;

/**
  Init the SMBIOS VIEW API's environment.

  @retval EFI_SUCCESS  Successful to init the SMBIOS VIEW Lib.
**/
EFI_STATUS
LibSmbiosInit (
  VOID
  )
{
  EFI_STATUS  Status;

  //
  // Init only once
  //
  if (mInit == 1) {
    return EFI_SUCCESS;
  }
  //
  // Get SMBIOS table from System Configure table
  //
  Status = GetSystemConfigurationTable (&gEfiSmbiosTableGuid, (VOID**)&mSmbiosTable);

  if (mSmbiosTable == NULL) {
    ShellPrintHiiEx(-1,-1,NULL,STRING_TOKEN (STR_SMBIOSVIEW_LIBSMBIOSVIEW_CANNOT_GET_TABLE), gShellDebug1HiiHandle);
    return EFI_NOT_FOUND;
  }

  if (EFI_ERROR (Status)) {
    ShellPrintHiiEx(-1,-1,NULL,STRING_TOKEN (STR_SMBIOSVIEW_LIBSMBIOSVIEW_GET_TABLE_ERROR), gShellDebug1HiiHandle, Status);
    return Status;
  }
  //
  // Init SMBIOS structure table address
  //
  mSmbiosStruct->Raw  = (UINT8 *) (UINTN) (mSmbiosTable->TableAddress);

  mInit               = 1;
  return EFI_SUCCESS;
}

/**
  Cleanup the Smbios information.
**/
VOID
LibSmbiosCleanup (
  VOID
  )
{
  //
  // Release resources
  //
  if (mSmbiosTable != NULL) {
    mSmbiosTable = NULL;
  }

  mInit = 0;
}

/**
  Get the entry point structure for the table.

  @param[out] EntryPointStructure  The pointer to populate.
**/
VOID
LibSmbiosGetEPS (
  OUT SMBIOS_STRUCTURE_TABLE **EntryPointStructure
  )
{
  //
  // return SMBIOS Table address
  //
  *EntryPointStructure = mSmbiosTable;
}

/**
    Get SMBIOS structure given the Handle,copy data to the Buffer,
    Handle is changed to the next handle or 0xFFFF when the end is
    reached or the handle is not found.

    @param[in, out] Handle     0xFFFF: get the first structure
                               Others: get a structure according to this value.
    @param[in, out] Buffer     The pointer to the caller's memory buffer.
    @param[out] Length         Length of return buffer in bytes.

    @retval DMI_SUCCESS   Buffer contains the required structure data
                          Handle is updated with next structure handle or
                          0xFFFF(end-of-list).

    @retval DMI_INVALID_HANDLE  Buffer not contain the requiring structure data.
                                Handle is updated with next structure handle or
                                0xFFFF(end-of-list).
**/
EFI_STATUS
LibGetSmbiosStructure (
  IN  OUT UINT16  *Handle,
  IN  OUT UINT8   *Buffer,
  OUT UINT16      *Length
  )
{
  SMBIOS_STRUCTURE_POINTER  Smbios;
  SMBIOS_STRUCTURE_POINTER  SmbiosEnd;
  UINT8                     *Raw;

  if (*Handle == INVALIDE_HANDLE) {
    *Handle = mSmbiosStruct->Hdr->Handle;
    return DMI_INVALID_HANDLE;
  }

  if (Buffer == NULL) {
    ShellPrintHiiEx(-1,-1,NULL,STRING_TOKEN (STR_SMBIOSVIEW_LIBSMBIOSVIEW_NO_BUFF_SPEC), gShellDebug1HiiHandle);
    return DMI_INVALID_HANDLE;
  }

  *Length       = 0;
  Smbios.Hdr    = mSmbiosStruct->Hdr;
  SmbiosEnd.Raw = Smbios.Raw + mSmbiosTable->TableLength;
  while (Smbios.Raw < SmbiosEnd.Raw) {
    if (Smbios.Hdr->Handle == *Handle) {
      Raw = Smbios.Raw;
      //
      // Walk to next structure
      //
      LibGetSmbiosString (&Smbios, (UINT16) (-1));
      //
      // Length = Next structure head - this structure head
      //
      *Length = (UINT16) (Smbios.Raw - Raw);
      CopyMem (Buffer, Raw, *Length);
      //
      // update with the next structure handle.
      //
      if (Smbios.Raw < SmbiosEnd.Raw) {
        *Handle = Smbios.Hdr->Handle;
      } else {
        *Handle = INVALIDE_HANDLE;
      }
      return DMI_SUCCESS;
    }
    //
    // Walk to next structure
    //
    LibGetSmbiosString (&Smbios, (UINT16) (-1));
  }

  *Handle = INVALIDE_HANDLE;
  return DMI_INVALID_HANDLE;
}

/**
  Check the structure to see if it is legal.

  @param[in] Smbios    - Pointer to the structure that will be checked.

  @retval DMI_SUCCESS           Structure data is legal.
  @retval DMI_BAD_PARAMETER     Structure data contains bad parameter.
**/
EFI_STATUS
SmbiosCheckStructure (
  IN  SMBIOS_STRUCTURE_POINTER *Smbios
  )
{
  //
  // If key != value, then error.
  //
#define CHECK_VALUE(key, value) (((key) == (value)) ? EFI_SUCCESS : DMI_BAD_PARAMETER)

  EFI_STATUS  Status;
  //
  // Assume staus is EFI_SUCCESS,
  // but if check is error, then EFI_ERROR.
  //
  Status = EFI_SUCCESS;

  switch (Smbios->Hdr->Type) {
  case 0:
    break;

  case 1:
    if (Smbios->Type1->Hdr.Length == 0x08 || Smbios->Type0->Hdr.Length == 0x19) {
      Status = EFI_SUCCESS;
    } else {
      Status = DMI_BAD_PARAMETER;
    }
    break;

  case 2:
    Status = CHECK_VALUE (Smbios->Type2->Hdr.Length, 0x08);
    break;

  case 6:
    Status = CHECK_VALUE (Smbios->Type6->Hdr.Length, 0x0C);
    break;

  case 11:
    Status = CHECK_VALUE (Smbios->Type11->Hdr.Length, 0x05);
    break;

  case 12:
    Status = CHECK_VALUE (Smbios->Type12->Hdr.Length, 0x05);
    break;

  case 13:
    Status = CHECK_VALUE (Smbios->Type13->Hdr.Length, 0x16);
    break;

  case 16:
    Status = CHECK_VALUE (Smbios->Type16->Hdr.Length, 0x0F);
    break;

  case 19:
    Status = CHECK_VALUE (Smbios->Type19->Hdr.Length, 0x0F);
    break;

  case 20:
    Status = CHECK_VALUE (Smbios->Type20->Hdr.Length, 0x13);
    break;

  case 32:
    //
    // Because EFI_SUCCESS == 0,
    // So errors added up is also error.
    //
    Status = CHECK_VALUE (Smbios->Type32->Reserved[0], 0x00) +
      CHECK_VALUE (Smbios->Type32->Reserved[1], 0x00) +
      CHECK_VALUE (Smbios->Type32->Reserved[2], 0x00) +
      CHECK_VALUE (Smbios->Type32->Reserved[3], 0x00) +
      CHECK_VALUE (Smbios->Type32->Reserved[4], 0x00) +
      CHECK_VALUE (Smbios->Type32->Reserved[5], 0x00);
    break;

  default:
    Status = DMI_BAD_PARAMETER;
  }

  return Status;
}

/**
  Get a string from the smbios information.

  @param[in] Smbios         The pointer to the smbios information.
  @param[in] StringNumber   The index to the string to get.
  @param[out] Buffer        The buffer to fill with the string when retrieved.
**/
VOID
SmbiosGetPendingString (
  IN  SMBIOS_STRUCTURE_POINTER      *Smbios,
  IN  UINT16                        StringNumber,
  OUT CHAR8                         *Buffer
  )
{
  CHAR8 *String;
  if (Buffer == NULL) {
    ShellPrintHiiEx(-1,-1,NULL,STRING_TOKEN (STR_SMBIOSVIEW_LIBSMBIOSVIEW_NO_BUF_SPEC_WHEN_STRUCT), gShellDebug1HiiHandle);
    return ;
  }
  //
  // Get string and copy to buffer.
  // Caller should provide the buffer.
  //
  String = LibGetSmbiosString (Smbios, StringNumber);
  if (String != NULL) {
    CopyMem (Buffer, String, AsciiStrLen(String));
  } else {
    Buffer = NULL;
  }
}