Perfect the msa of the following modules, DiskIo, Partition, English and Ebc.

[mirror_edk2.git] / EdkModulePkg / Universal / Disk / Partition / Dxe / Partition.c

/*++\r
\r
Copyright (c) 2006, Intel Corporation\r
All rights reserved. This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
Module Name:\r
\r
  Partition.c\r
\r
Abstract:\r
\r
  Partition driver that produces logical BlockIo devices from a physical\r
  BlockIo device. The logical BlockIo devices are based on the format\r
  of the raw block devices media. Currently "El Torito CD-ROM", Legacy\r
  MBR, and GPT partition schemes are supported.\r
\r
--*/\r
\r
#include "Partition.h"\r
\r
//\r
// Partition Driver Global Variables\r
//\r
EFI_DRIVER_BINDING_PROTOCOL gPartitionDriverBinding = {\r
  PartitionDriverBindingSupported,\r
  PartitionDriverBindingStart,\r
  PartitionDriverBindingStop,\r
  0xa,\r
  NULL,\r
  NULL\r
};\r
\r
STATIC \r
PARTITION_DETECT_ROUTINE mPartitionDetectRoutineTable[] = {\r
  PartitionInstallGptChildHandles,\r
  PartitionInstallElToritoChildHandles,\r
  PartitionInstallMbrChildHandles,\r
  NULL\r
};\r
\r
\r
EFI_STATUS\r
EFIAPI\r
PartitionDriverBindingSupported (\r
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN EFI_HANDLE                   ControllerHandle,\r
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath\r
  )\r
/*++\r
\r
  Routine Description:\r
    Test to see if this driver supports ControllerHandle. Any ControllerHandle\r
    than contains a BlockIo and DiskIo protocol can be supported.\r
\r
  Arguments:\r
    This                - Protocol instance pointer.\r
    ControllerHandle    - Handle of device to test\r
    RemainingDevicePath - Not used\r
\r
  Returns:\r
    EFI_SUCCESS         - This driver supports this device\r
    EFI_ALREADY_STARTED - This driver is already running on this device\r
    EFI_UNSUPPORTED     - This driver does not support this device\r
\r
--*/\r
{\r
  EFI_STATUS                Status;\r
  EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath;\r
  EFI_DISK_IO_PROTOCOL      *DiskIo;\r
  EFI_DEV_PATH              *Node;\r
\r
  if (RemainingDevicePath != NULL) {\r
    Node = (EFI_DEV_PATH *) RemainingDevicePath;\r
    if (Node->DevPath.Type != MEDIA_DEVICE_PATH ||\r
        Node->DevPath.SubType != MEDIA_HARDDRIVE_DP ||\r
        DevicePathNodeLength (&Node->DevPath) != sizeof (HARDDRIVE_DEVICE_PATH)\r
        ) {\r
      return EFI_UNSUPPORTED;\r
    }\r
  }\r
  //\r
  // Open the IO Abstraction(s) needed to perform the supported test\r
  //\r
  Status = gBS->OpenProtocol (\r
                  ControllerHandle,\r
                  &gEfiDevicePathProtocolGuid,\r
                  (VOID **) &ParentDevicePath,\r
                  This->DriverBindingHandle,\r
                  ControllerHandle,\r
                  EFI_OPEN_PROTOCOL_BY_DRIVER\r
                  );\r
  if (Status == EFI_ALREADY_STARTED) {\r
    return EFI_SUCCESS;\r
  }\r
\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
  //\r
  // Close the I/O Abstraction(s) used to perform the supported test\r
  //\r
  gBS->CloseProtocol (\r
        ControllerHandle,\r
        &gEfiDevicePathProtocolGuid,\r
        This->DriverBindingHandle,\r
        ControllerHandle\r
        );\r
\r
  //\r
  // Open the IO Abstraction(s) needed to perform the supported test\r
  //\r
  Status = gBS->OpenProtocol (\r
                  ControllerHandle,\r
                  &gEfiDiskIoProtocolGuid,\r
                  (VOID **) &DiskIo,\r
                  This->DriverBindingHandle,\r
                  ControllerHandle,\r
                  EFI_OPEN_PROTOCOL_BY_DRIVER\r
                  );\r
  if (Status == EFI_ALREADY_STARTED) {\r
    return EFI_SUCCESS;\r
  }\r
\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
  //\r
  // Close the I/O Abstraction(s) used to perform the supported test\r
  //\r
  gBS->CloseProtocol (\r
        ControllerHandle,\r
        &gEfiDiskIoProtocolGuid,\r
        This->DriverBindingHandle,\r
        ControllerHandle\r
        );\r
\r
  //\r
  // Open the IO Abstraction(s) needed to perform the supported test\r
  //\r
  Status = gBS->OpenProtocol (\r
                  ControllerHandle,\r
                  &gEfiBlockIoProtocolGuid,\r
                  NULL,\r
                  This->DriverBindingHandle,\r
                  ControllerHandle,\r
                  EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r
                  );\r
\r
  return Status;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
PartitionDriverBindingStart (\r
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN EFI_HANDLE                   ControllerHandle,\r
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath\r
  )\r
/*++\r
\r
  Routine Description:\r
    Start this driver on ControllerHandle by opening a Block IO and Disk IO\r
    protocol, reading Device Path, and creating a child handle with a\r
    Disk IO and device path protocol.\r
\r
  Arguments:\r
    This                - Protocol instance pointer.\r
    ControllerHandle    - Handle of device to bind driver to\r
    RemainingDevicePath - Not used\r
\r
  Returns:\r
    EFI_SUCCESS         - This driver is added to DeviceHandle\r
    EFI_ALREADY_STARTED - This driver is already running on DeviceHandle\r
    other               - This driver does not support this device\r
\r
--*/\r
{\r
  EFI_STATUS                Status;\r
  EFI_STATUS                OpenStatus;\r
  EFI_BLOCK_IO_PROTOCOL     *BlockIo;\r
  EFI_DISK_IO_PROTOCOL      *DiskIo;\r
  EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath;\r
  PARTITION_DETECT_ROUTINE  *Routine;\r
\r
  Status = gBS->OpenProtocol (\r
                  ControllerHandle,\r
                  &gEfiBlockIoProtocolGuid,\r
                  (VOID **) &BlockIo,\r
                  This->DriverBindingHandle,\r
                  ControllerHandle,\r
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
  //\r
  // Get the Device Path Protocol on ControllerHandle's handle\r
  //\r
  Status = gBS->OpenProtocol (\r
                  ControllerHandle,\r
                  &gEfiDevicePathProtocolGuid,\r
                  (VOID **) &ParentDevicePath,\r
                  This->DriverBindingHandle,\r
                  ControllerHandle,\r
                  EFI_OPEN_PROTOCOL_BY_DRIVER\r
                  );\r
  if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r
    return Status;\r
  }\r
\r
  Status = gBS->OpenProtocol (\r
                  ControllerHandle,\r
                  &gEfiDiskIoProtocolGuid,\r
                  (VOID **) &DiskIo,\r
                  This->DriverBindingHandle,\r
                  ControllerHandle,\r
                  EFI_OPEN_PROTOCOL_BY_DRIVER\r
                  );\r
  if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r
    gBS->CloseProtocol (\r
          ControllerHandle,\r
          &gEfiDevicePathProtocolGuid,\r
          This->DriverBindingHandle,\r
          ControllerHandle\r
          );\r
    return Status;\r
  }\r
\r
  OpenStatus = Status;\r
\r
  //\r
  // If no media is present, do nothing here.\r
  //\r
  Status = EFI_UNSUPPORTED;\r
  if (BlockIo->Media->MediaPresent) {\r
    //\r
    // Try for GPT, then El Torito, and then legacy MBR partition types. If the\r
    // media supports a given partition type install child handles to represent\r
    // the partitions described by the media.\r
    //\r
    Routine = &mPartitionDetectRoutineTable[0];\r
    while (*Routine != NULL) {\r
      Status = (*Routine) (\r
                   This,\r
                   ControllerHandle,\r
                   DiskIo,\r
                   BlockIo,\r
                   ParentDevicePath\r
                   );\r
      if (!EFI_ERROR (Status) || Status == EFI_MEDIA_CHANGED) {\r
        break;\r
      }\r
      Routine++;\r
    }\r
  }\r
  //\r
  // In the case that the driver is already started (OpenStatus == EFI_ALREADY_STARTED),\r
  // the DevicePathProtocol and the DiskIoProtocol are not actually opened by the\r
  // driver. So don't try to close them. Otherwise, we will break the dependency\r
  // between the controller and the driver set up before.\r
  //\r
  if (EFI_ERROR (Status) && !EFI_ERROR (OpenStatus) && Status != EFI_MEDIA_CHANGED) {\r
    gBS->CloseProtocol (\r
          ControllerHandle,\r
          &gEfiDiskIoProtocolGuid,\r
          This->DriverBindingHandle,\r
          ControllerHandle\r
          );\r
\r
    gBS->CloseProtocol (\r
          ControllerHandle,\r
          &gEfiDevicePathProtocolGuid,\r
          This->DriverBindingHandle,\r
          ControllerHandle\r
          );\r
  }\r
\r
  return Status;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
PartitionDriverBindingStop (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL   *This,\r
  IN  EFI_HANDLE                    ControllerHandle,\r
  IN  UINTN                         NumberOfChildren,\r
  IN  EFI_HANDLE                    *ChildHandleBuffer\r
  )\r
/*++\r
\r
  Routine Description:\r
    Stop this driver on ControllerHandle. Support stoping any child handles\r
    created by this driver.\r
\r
  Arguments:\r
    This              - Protocol instance pointer.\r
    ControllerHandle  - Handle of device to stop driver on\r
    NumberOfChildren  - Number of Children in the ChildHandleBuffer\r
    ChildHandleBuffer - List of handles for the children we need to stop.\r
\r
  Returns:\r
    EFI_SUCCESS         - This driver is removed DeviceHandle\r
    EFI_DEVICE_ERROR    - This driver was not removed from this device\r
\r
--*/\r
{\r
  EFI_STATUS              Status;\r
  UINTN                   Index;\r
  EFI_BLOCK_IO_PROTOCOL   *BlockIo;\r
  BOOLEAN                 AllChildrenStopped;\r
  PARTITION_PRIVATE_DATA  *Private;\r
  EFI_DISK_IO_PROTOCOL    *DiskIo;\r
\r
  if (NumberOfChildren == 0) {\r
    //\r
    // Close the bus driver\r
    //\r
    gBS->CloseProtocol (\r
          ControllerHandle,\r
          &gEfiDiskIoProtocolGuid,\r
          This->DriverBindingHandle,\r
          ControllerHandle\r
          );\r
\r
    gBS->CloseProtocol (\r
          ControllerHandle,\r
          &gEfiDevicePathProtocolGuid,\r
          This->DriverBindingHandle,\r
          ControllerHandle\r
          );\r
\r
    return EFI_SUCCESS;\r
  }\r
\r
  AllChildrenStopped = TRUE;\r
  for (Index = 0; Index < NumberOfChildren; Index++) {\r
    Status = gBS->OpenProtocol (\r
                    ChildHandleBuffer[Index],\r
                    &gEfiBlockIoProtocolGuid,\r
                    (VOID **) &BlockIo,\r
                    This->DriverBindingHandle,\r
                    ControllerHandle,\r
                    EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
                    );\r
    if (!EFI_ERROR (Status)) {\r
\r
      Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (BlockIo);\r
\r
      //\r
      // All Software protocols have be freed from the handle so remove it.\r
      //\r
      BlockIo->FlushBlocks (BlockIo);\r
\r
      Status = gBS->CloseProtocol (\r
                      ControllerHandle,\r
                      &gEfiDiskIoProtocolGuid,\r
                      This->DriverBindingHandle,\r
                      ChildHandleBuffer[Index]\r
                      );\r
\r
      Status = gBS->UninstallMultipleProtocolInterfaces (\r
                      ChildHandleBuffer[Index],\r
                      &gEfiDevicePathProtocolGuid,\r
                      Private->DevicePath,\r
                      &gEfiBlockIoProtocolGuid,\r
                      &Private->BlockIo,\r
                      Private->EspGuid,\r
                      NULL,\r
                      NULL\r
                      );\r
      if (EFI_ERROR (Status)) {\r
        gBS->OpenProtocol (\r
              ControllerHandle,\r
              &gEfiDiskIoProtocolGuid,\r
              (VOID **) &DiskIo,\r
              This->DriverBindingHandle,\r
              ChildHandleBuffer[Index],\r
              EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r
              );\r
      } else {\r
        FreePool (Private->DevicePath);\r
        FreePool (Private);\r
      }\r
\r
    }\r
\r
    if (EFI_ERROR (Status)) {\r
      AllChildrenStopped = FALSE;\r
    }\r
  }\r
\r
  if (!AllChildrenStopped) {\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
PartitionReset (\r
  IN EFI_BLOCK_IO_PROTOCOL  *This,\r
  IN BOOLEAN                ExtendedVerification\r
  )\r
/*++\r
\r
  Routine Description:\r
    Reset the parent Block Device.\r
\r
  Arguments:\r
    This                 - Protocol instance pointer.\r
    ExtendedVerification - Driver may perform diagnostics on reset.\r
\r
  Returns:\r
    EFI_SUCCESS           - The device was reset.\r
    EFI_DEVICE_ERROR      - The device is not functioning properly and could\r
                            not be reset.\r
\r
--*/\r
{\r
  PARTITION_PRIVATE_DATA  *Private;\r
\r
  Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r
\r
  return Private->ParentBlockIo->Reset (\r
                                  Private->ParentBlockIo,\r
                                  ExtendedVerification\r
                                  );\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
PartitionReadBlocks (\r
  IN EFI_BLOCK_IO_PROTOCOL  *This,\r
  IN UINT32                 MediaId,\r
  IN EFI_LBA                Lba,\r
  IN UINTN                  BufferSize,\r
  OUT VOID                  *Buffer\r
  )\r
/*++\r
\r
  Routine Description:\r
    Read by using the Disk IO protocol on the parent device. Lba addresses\r
    must be converted to byte offsets.\r
\r
  Arguments:\r
    This       - Protocol instance pointer.\r
    MediaId    - Id of the media, changes every time the media is replaced.\r
    Lba        - The starting Logical Block Address to read from\r
    BufferSize - Size of Buffer, must be a multiple of device block size.\r
    Buffer     - Buffer containing read data\r
\r
  Returns:\r
    EFI_SUCCESS           - The data was read correctly from the device.\r
    EFI_DEVICE_ERROR      - The device reported an error while performing the read.\r
    EFI_NO_MEDIA          - There is no media in the device.\r
    EFI_MEDIA_CHANGED     - The MediaId does not matched the current device.\r
    EFI_BAD_BUFFER_SIZE   - The Buffer was not a multiple of the block size of the\r
                            device.\r
    EFI_INVALID_PARAMETER - The read request contains device addresses that are not\r
                            valid for the device.\r
\r
--*/\r
{\r
  PARTITION_PRIVATE_DATA  *Private;\r
  UINT64                  Offset;\r
\r
  Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r
\r
  if (BufferSize % Private->BlockSize != 0) {\r
    return EFI_BAD_BUFFER_SIZE;\r
  }\r
\r
  Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r
  if (Offset + BufferSize > Private->End) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
  //\r
  // Because some kinds of partition have different block size from their parent\r
  // device, we call the Disk IO protocol on the parent device, not the Block IO\r
  // protocol\r
  //\r
  return Private->DiskIo->ReadDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
PartitionWriteBlocks (\r
  IN EFI_BLOCK_IO_PROTOCOL  *This,\r
  IN UINT32                 MediaId,\r
  IN EFI_LBA                Lba,\r
  IN UINTN                  BufferSize,\r
  OUT VOID                  *Buffer\r
  )\r
/*++\r
\r
  Routine Description:\r
    Write by using the Disk IO protocol on the parent device. Lba addresses\r
    must be converted to byte offsets.\r
\r
  Arguments:\r
    This       - Protocol instance pointer.\r
    MediaId    - Id of the media, changes every time the media is replaced.\r
    Lba        - The starting Logical Block Address to read from\r
    BufferSize - Size of Buffer, must be a multiple of device block size.\r
    Buffer     - Buffer containing read data\r
\r
  Returns:\r
    EFI_SUCCESS           - The data was written correctly to the device.\r
    EFI_WRITE_PROTECTED   - The device can not be written to.\r
    EFI_DEVICE_ERROR      - The device reported an error while performing the write.\r
    EFI_NO_MEDIA          - There is no media in the device.\r
    EFI_MEDIA_CHNAGED     - The MediaId does not matched the current device.\r
    EFI_BAD_BUFFER_SIZE   - The Buffer was not a multiple of the block size of the\r
                            device.\r
    EFI_INVALID_PARAMETER - The write request contains a LBA that is not\r
                            valid for the device.\r
\r
--*/\r
{\r
  PARTITION_PRIVATE_DATA  *Private;\r
  UINT64                  Offset;\r
\r
  Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r
\r
  if (BufferSize % Private->BlockSize != 0) {\r
    return EFI_BAD_BUFFER_SIZE;\r
  }\r
\r
  Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r
  if (Offset + BufferSize > Private->End) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
  //\r
  // Because some kinds of partition have different block size from their parent\r
  // device, we call the Disk IO protocol on the parent device, not the Block IO\r
  // protocol\r
  //\r
  return Private->DiskIo->WriteDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
PartitionFlushBlocks (\r
  IN EFI_BLOCK_IO_PROTOCOL  *This\r
  )\r
/*++\r
\r
  Routine Description:\r
    Flush the parent Block Device.\r
\r
  Arguments:\r
    This             - Protocol instance pointer.\r
\r
  Returns:\r
    EFI_SUCCESS      - All outstanding data was written to the device\r
    EFI_DEVICE_ERROR - The device reported an error while writing back the data\r
    EFI_NO_MEDIA     - There is no media in the device.\r
\r
--*/\r
{\r
  PARTITION_PRIVATE_DATA  *Private;\r
\r
  Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r
\r
  return Private->ParentBlockIo->FlushBlocks (Private->ParentBlockIo);\r
}\r
\r
EFI_STATUS\r
PartitionInstallChildHandle (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN  EFI_HANDLE                   ParentHandle,\r
  IN  EFI_DISK_IO_PROTOCOL         *ParentDiskIo,\r
  IN  EFI_BLOCK_IO_PROTOCOL        *ParentBlockIo,\r
  IN  EFI_DEVICE_PATH_PROTOCOL     *ParentDevicePath,\r
  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePathNode,\r
  IN  EFI_LBA                      Start,\r
  IN  EFI_LBA                      End,\r
  IN  UINT32                       BlockSize,\r
  IN  BOOLEAN                      InstallEspGuid\r
  )\r
/*++\r
\r
Routine Description:\r
  Create a child handle for a logical block device that represents the\r
  bytes Start to End of the Parent Block IO device.\r
\r
Arguments:\r
  This             - Calling context.\r
  ParentHandle     - Parent Handle for new child\r
  ParentDiskIo     - Parent DiskIo interface\r
  ParentBlockIo    - Parent BlockIo interface\r
  ParentDevicePath - Parent Device Path\r
  DevicePathNode   - Child Device Path node\r
  Start            - Start Block\r
  End              - End Block\r
  BlockSize        - Child block size\r
  InstallEspGuid   - Flag to install EFI System Partition GUID on handle\r
\r
Returns:\r
  EFI_SUCCESS - If a child handle was added\r
  EFI_OUT_OF_RESOURCES  - A child handle was not added\r
\r
--*/\r
{\r
  EFI_STATUS              Status;\r
  PARTITION_PRIVATE_DATA  *Private;\r
\r
  Private = AllocateZeroPool (sizeof (PARTITION_PRIVATE_DATA));\r
  if (Private == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  Private->Signature        = PARTITION_PRIVATE_DATA_SIGNATURE;\r
\r
  Private->Start            = MultU64x32 (Start, ParentBlockIo->Media->BlockSize);\r
  Private->End              = MultU64x32 (End + 1, ParentBlockIo->Media->BlockSize);\r
\r
  Private->BlockSize        = BlockSize;\r
  Private->ParentBlockIo    = ParentBlockIo;\r
  Private->DiskIo           = ParentDiskIo;\r
\r
  Private->BlockIo.Revision = EFI_BLOCK_IO_PROTOCOL_REVISION;\r
\r
  Private->BlockIo.Media    = &Private->Media;\r
  CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));\r
  Private->Media.LogicalPartition = TRUE;\r
  Private->Media.LastBlock = DivU64x32 (\r
                               MultU64x32 (\r
                                 End - Start + 1,\r
                                 ParentBlockIo->Media->BlockSize\r
                                 ),\r
                               BlockSize\r
                               ) - 1;\r
\r
  Private->Media.BlockSize      = (UINT32) BlockSize;\r
\r
  Private->BlockIo.Reset        = PartitionReset;\r
  Private->BlockIo.ReadBlocks   = PartitionReadBlocks;\r
  Private->BlockIo.WriteBlocks  = PartitionWriteBlocks;\r
  Private->BlockIo.FlushBlocks  = PartitionFlushBlocks;\r
\r
  Private->DevicePath           = AppendDevicePathNode (ParentDevicePath, DevicePathNode);\r
\r
  if (Private->DevicePath == NULL) {\r
    FreePool (Private);\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  if (InstallEspGuid) {\r
    Private->EspGuid = &gEfiPartTypeSystemPartGuid;\r
  } else {\r
    //\r
    // If NULL InstallMultipleProtocolInterfaces will ignore it.\r
    //\r
    Private->EspGuid = NULL;\r
  }\r
  //\r
  // Create the new handle\r
  //\r
  Private->Handle = NULL;\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                  &Private->Handle,\r
                  &gEfiDevicePathProtocolGuid,\r
                  Private->DevicePath,\r
                  &gEfiBlockIoProtocolGuid,\r
                  &Private->BlockIo,\r
                  Private->EspGuid,\r
                  NULL,\r
                  NULL\r
                  );\r
\r
  if (!EFI_ERROR (Status)) {\r
    //\r
    // Open the Parent Handle for the child\r
    //\r
    Status = gBS->OpenProtocol (\r
                    ParentHandle,\r
                    &gEfiDiskIoProtocolGuid,\r
                    (VOID **) &ParentDiskIo,\r
                    This->DriverBindingHandle,\r
                    Private->Handle,\r
                    EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r
                    );\r
  } else {\r
    FreePool (Private->DevicePath);\r
    FreePool (Private);\r
  }\r
\r
  return Status;\r
}\r