Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 4189 insertions, 0 deletions

diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c
new file mode 100644
index 00000000..0bfc7aac
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.c
@@ -0,0 +1,1712 @@
+/** @file
+  This file implements protocol interfaces for ATA bus driver.
+
+  This file implements protocol interfaces: Driver Binding protocol,
+  Block IO protocol and DiskInfo protocol.
+
+  Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+
+**/
+
+#include "AtaBus.h"
+
+//
+// ATA Bus Driver Binding Protocol Instance
+//
+EFI_DRIVER_BINDING_PROTOCOL gAtaBusDriverBinding = {
+  AtaBusDriverBindingSupported,
+  AtaBusDriverBindingStart,
+  AtaBusDriverBindingStop,
+  0x10,
+  NULL,
+  NULL
+};
+
+//
+// Template for ATA Child Device.
+//
+ATA_DEVICE gAtaDeviceTemplate = {
+  ATA_DEVICE_SIGNATURE,        // Signature
+  NULL,                        // Handle
+  {                            // BlockIo
+    EFI_BLOCK_IO_PROTOCOL_REVISION,
+    NULL,
+    AtaBlockIoReset,
+    AtaBlockIoReadBlocks,
+    AtaBlockIoWriteBlocks,
+    AtaBlockIoFlushBlocks
+  },
+  {                            // BlockIo2
+    NULL,
+    AtaBlockIoResetEx,
+    AtaBlockIoReadBlocksEx,
+    AtaBlockIoWriteBlocksEx,
+    AtaBlockIoFlushBlocksEx
+  },
+  {                            // BlockMedia
+    0,                         // MediaId
+    FALSE,                     // RemovableMedia
+    TRUE,                      // MediaPresent
+    FALSE,                     // LogicPartition
+    FALSE,                     // ReadOnly
+    FALSE,                     // WritingCache
+    0x200,                     // BlockSize
+    0,                         // IoAlign
+    0,                         // LastBlock
+    0,                         // LowestAlignedLba
+    1                          // LogicalBlocksPerPhysicalBlock
+  },
+  {                            // DiskInfo
+    EFI_DISK_INFO_IDE_INTERFACE_GUID,
+    AtaDiskInfoInquiry,
+    AtaDiskInfoIdentify,
+    AtaDiskInfoSenseData,
+    AtaDiskInfoWhichIde
+  },
+  NULL,                        // DevicePath
+  {
+    AtaStorageSecurityReceiveData,
+    AtaStorageSecuritySendData
+  },
+  NULL,                        // AtaBusDriverData
+  0,                           // Port
+  0,                           // PortMultiplierPort
+  { 0, },                      // Packet
+  {{ 0}, },                    // Acb
+  NULL,                        // Asb
+  FALSE,                       // UdmaValid
+  FALSE,                       // Lba48Bit
+  NULL,                        // IdentifyData
+  NULL,                        // ControllerNameTable
+  {L'\0', },                   // ModelName
+  {NULL, NULL},                // AtaTaskList
+  {NULL, NULL},                // AtaSubTaskList
+  FALSE                        // Abort
+};
+
+/**
+  Allocates an aligned buffer for ATA device.
+
+  This function allocates an aligned buffer for the ATA device to perform
+  ATA pass through operations. The alignment requirement is from ATA pass
+  through interface.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+  @param  BufferSize        The request buffer size.
+
+  @return A pointer to the aligned buffer or NULL if the allocation fails.
+
+**/
+VOID *
+AllocateAlignedBuffer (
+  IN ATA_DEVICE               *AtaDevice,
+  IN UINTN                    BufferSize
+  )
+{
+  return AllocateAlignedPages (EFI_SIZE_TO_PAGES (BufferSize), AtaDevice->AtaBusDriverData->AtaPassThru->Mode->IoAlign);
+}
+
+/**
+  Frees an aligned buffer for ATA device.
+
+  This function frees an aligned buffer for the ATA device to perform
+  ATA pass through operations.
+
+  @param  Buffer            The aligned buffer to be freed.
+  @param  BufferSize        The request buffer size.
+
+**/
+VOID
+FreeAlignedBuffer (
+  IN VOID                     *Buffer,
+  IN UINTN                    BufferSize
+  )
+{
+  if (Buffer != NULL) {
+    FreeAlignedPages (Buffer, EFI_SIZE_TO_PAGES (BufferSize));
+  }
+}
+
+
+/**
+  Release all the resources allocated for the ATA device.
+
+  This function releases all the resources allocated for the ATA device.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+**/
+VOID
+ReleaseAtaResources (
+  IN ATA_DEVICE  *AtaDevice
+  )
+{
+  ATA_BUS_ASYN_SUB_TASK *SubTask;
+  ATA_BUS_ASYN_TASK     *AtaTask;
+  LIST_ENTRY            *Entry;
+  LIST_ENTRY            *DelEntry;
+  EFI_TPL               OldTpl;
+
+  FreeUnicodeStringTable (AtaDevice->ControllerNameTable);
+  FreeAlignedBuffer (AtaDevice->Asb, sizeof (EFI_ATA_STATUS_BLOCK));
+  FreeAlignedBuffer (AtaDevice->IdentifyData, sizeof (ATA_IDENTIFY_DATA));
+  if (AtaDevice->DevicePath != NULL) {
+    FreePool (AtaDevice->DevicePath);
+  }
+  OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+  if (!IsListEmpty (&AtaDevice->AtaSubTaskList)) {
+    //
+    // Free the Subtask list.
+    //
+    for(Entry = AtaDevice->AtaSubTaskList.ForwardLink;
+        Entry != (&AtaDevice->AtaSubTaskList);
+       ) {
+      DelEntry = Entry;
+      Entry    = Entry->ForwardLink;
+      SubTask  = ATA_ASYN_SUB_TASK_FROM_ENTRY (DelEntry);
+
+      RemoveEntryList (DelEntry);
+      FreeAtaSubTask (SubTask);
+    }
+  }
+  if (!IsListEmpty (&AtaDevice->AtaTaskList)) {
+    //
+    // Free the Subtask list.
+    //
+    for(Entry = AtaDevice->AtaTaskList.ForwardLink;
+        Entry != (&AtaDevice->AtaTaskList);
+       ) {
+      DelEntry = Entry;
+      Entry    = Entry->ForwardLink;
+      AtaTask  = ATA_ASYN_TASK_FROM_ENTRY (DelEntry);
+
+      RemoveEntryList (DelEntry);
+      FreePool (AtaTask);
+    }
+  }
+  gBS->RestoreTPL (OldTpl);
+  FreePool (AtaDevice);
+}
+
+
+/**
+  Registers an ATA device.
+
+  This function allocates an ATA device structure for the ATA device specified by
+  Port and PortMultiplierPort if the ATA device is identified as a valid one.
+  Then it will create child handle and install Block IO and Disk Info protocol on
+  it.
+
+  @param  AtaBusDriverData      The parent ATA bus driver data structure.
+  @param  Port                  The port number of the ATA device.
+  @param  PortMultiplierPort    The port multiplier port number of the ATA device.
+
+  @retval EFI_SUCCESS           The ATA device is successfully registered.
+  @retval EFI_OUT_OF_RESOURCES  There is not enough memory to allocate the ATA device
+                                and related data structures.
+  @return Others                Some error occurs when registering the ATA device.
+**/
+EFI_STATUS
+RegisterAtaDevice (
+  IN OUT ATA_BUS_DRIVER_DATA        *AtaBusDriverData,
+  IN     UINT16                     Port,
+  IN     UINT16                     PortMultiplierPort
+  )
+{
+  EFI_STATUS                        Status;
+  ATA_DEVICE                        *AtaDevice;
+  EFI_ATA_PASS_THRU_PROTOCOL        *AtaPassThru;
+  EFI_DEVICE_PATH_PROTOCOL          *NewDevicePathNode;
+  EFI_DEVICE_PATH_PROTOCOL          *DevicePath;
+  EFI_DEVICE_PATH_PROTOCOL          *RemainingDevicePath;
+  EFI_HANDLE                        DeviceHandle;
+
+  AtaDevice         = NULL;
+  NewDevicePathNode = NULL;
+  DevicePath        = NULL;
+  RemainingDevicePath = NULL;
+
+  //
+  // Build device path
+  //
+  AtaPassThru = AtaBusDriverData->AtaPassThru;
+  Status = AtaPassThru->BuildDevicePath (AtaPassThru, Port, PortMultiplierPort, &NewDevicePathNode);
+  if (EFI_ERROR (Status)) {
+    goto Done;
+  }
+
+  DevicePath = AppendDevicePathNode (AtaBusDriverData->ParentDevicePath, NewDevicePathNode);
+  if (DevicePath == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  DeviceHandle = NULL;
+  RemainingDevicePath = DevicePath;
+  Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &DeviceHandle);
+  if (!EFI_ERROR (Status) && (DeviceHandle != NULL) && IsDevicePathEnd(RemainingDevicePath)) {
+    Status = EFI_ALREADY_STARTED;
+    FreePool (DevicePath);
+    goto Done;
+  }
+
+  //
+  // Allocate ATA device from the template.
+  //
+  AtaDevice = AllocateCopyPool (sizeof (ATA_DEVICE), &gAtaDeviceTemplate);
+  if (AtaDevice == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  //
+  // Initializes ATA device structures and allocates the required buffer.
+  //
+  AtaDevice->BlockIo.Media      = &AtaDevice->BlockMedia;
+  AtaDevice->BlockIo2.Media     = &AtaDevice->BlockMedia;
+  AtaDevice->AtaBusDriverData   = AtaBusDriverData;
+  AtaDevice->DevicePath         = DevicePath;
+  AtaDevice->Port               = Port;
+  AtaDevice->PortMultiplierPort = PortMultiplierPort;
+  AtaDevice->Asb = AllocateAlignedBuffer (AtaDevice, sizeof (EFI_ATA_STATUS_BLOCK));
+  if (AtaDevice->Asb == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Done;
+  }
+  AtaDevice->IdentifyData = AllocateAlignedBuffer (AtaDevice, sizeof (ATA_IDENTIFY_DATA));
+  if (AtaDevice->IdentifyData == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Done;
+  }
+
+  //
+  // Initial Ata Task List
+  //
+  InitializeListHead (&AtaDevice->AtaTaskList);
+  InitializeListHead (&AtaDevice->AtaSubTaskList);
+
+  //
+  // Report Status Code to indicate the ATA device will be enabled
+  //
+  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
+    EFI_PROGRESS_CODE,
+    (EFI_IO_BUS_ATA_ATAPI | EFI_IOB_PC_ENABLE),
+    AtaBusDriverData->ParentDevicePath
+    );
+
+  //
+  // Try to identify the ATA device via the ATA pass through command.
+  //
+  Status = DiscoverAtaDevice (AtaDevice);
+  if (EFI_ERROR (Status)) {
+    goto Done;
+  }
+
+  //
+  // Build controller name for Component Name (2) protocol.
+  //
+  Status = AddUnicodeString2 (
+             "eng",
+             gAtaBusComponentName.SupportedLanguages,
+             &AtaDevice->ControllerNameTable,
+             AtaDevice->ModelName,
+             TRUE
+             );
+  if (EFI_ERROR (Status)) {
+    goto Done;
+  }
+
+  Status = AddUnicodeString2 (
+             "en",
+             gAtaBusComponentName2.SupportedLanguages,
+             &AtaDevice->ControllerNameTable,
+             AtaDevice->ModelName,
+             FALSE
+             );
+  if (EFI_ERROR (Status)) {
+    goto Done;
+  }
+
+  //
+  // Update to AHCI interface GUID based on device path node. The default one
+  // is IDE interface GUID copied from template.
+  //
+  if (NewDevicePathNode->SubType == MSG_SATA_DP) {
+    CopyGuid (&AtaDevice->DiskInfo.Interface, &gEfiDiskInfoAhciInterfaceGuid);
+  }
+
+  Status = gBS->InstallMultipleProtocolInterfaces (
+                  &AtaDevice->Handle,
+                  &gEfiDevicePathProtocolGuid,
+                  AtaDevice->DevicePath,
+                  &gEfiBlockIoProtocolGuid,
+                  &AtaDevice->BlockIo,
+                  &gEfiBlockIo2ProtocolGuid,
+                  &AtaDevice->BlockIo2,
+                  &gEfiDiskInfoProtocolGuid,
+                  &AtaDevice->DiskInfo,
+                  NULL
+                  );
+  if (EFI_ERROR (Status)) {
+    goto Done;
+  }
+
+  //
+  // See if the ata device support trust computing feature or not.
+  // If yes, then install Storage Security Protocol at the ata device handle.
+  //
+  if ((AtaDevice->IdentifyData->trusted_computing_support & BIT0) != 0) {
+    DEBUG ((EFI_D_INFO, "Found TCG support in Port %x PortMultiplierPort %x\n", Port, PortMultiplierPort));
+    Status = gBS->InstallProtocolInterface (
+                    &AtaDevice->Handle,
+                    &gEfiStorageSecurityCommandProtocolGuid,
+                    EFI_NATIVE_INTERFACE,
+                    &AtaDevice->StorageSecurity
+                    );
+    if (EFI_ERROR (Status)) {
+      goto Done;
+    }
+    DEBUG ((EFI_D_INFO, "Successfully Install Storage Security Protocol on the ATA device\n"));
+  }
+
+  gBS->OpenProtocol (
+         AtaBusDriverData->Controller,
+         &gEfiAtaPassThruProtocolGuid,
+         (VOID **) &AtaPassThru,
+         AtaBusDriverData->DriverBindingHandle,
+         AtaDevice->Handle,
+         EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+         );
+
+Done:
+  if (NewDevicePathNode != NULL) {
+    FreePool (NewDevicePathNode);
+  }
+
+  if (EFI_ERROR (Status) && (AtaDevice != NULL)) {
+    ReleaseAtaResources (AtaDevice);
+    DEBUG ((EFI_D_ERROR | EFI_D_INIT, "Failed to initialize Port %x PortMultiplierPort %x, status = %r\n", Port, PortMultiplierPort, Status));
+  }
+  return Status;
+}
+
+
+/**
+  Unregisters an ATA device.
+
+  This function removes the protocols installed on the controller handle and
+  frees the resources allocated for the ATA device.
+
+  @param  This                  The pointer to EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param  Controller            The controller handle of the ATA device.
+  @param  Handle                The child handle.
+
+  @retval EFI_SUCCESS           The ATA device is successfully unregistered.
+  @return Others                Some error occurs when unregistering the ATA device.
+
+**/
+EFI_STATUS
+UnregisterAtaDevice (
+  IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
+  IN  EFI_HANDLE                     Controller,
+  IN  EFI_HANDLE                     Handle
+  )
+{
+  EFI_STATUS                               Status;
+  EFI_BLOCK_IO_PROTOCOL                    *BlockIo;
+  EFI_BLOCK_IO2_PROTOCOL                   *BlockIo2;
+  ATA_DEVICE                               *AtaDevice;
+  EFI_ATA_PASS_THRU_PROTOCOL               *AtaPassThru;
+  EFI_STORAGE_SECURITY_COMMAND_PROTOCOL    *StorageSecurity;
+
+  BlockIo2             =     NULL;
+  BlockIo              =     NULL;
+
+  Status = gBS->OpenProtocol (
+                  Handle,
+                  &gEfiBlockIoProtocolGuid,
+                  (VOID **) &BlockIo,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                  );
+  if (EFI_ERROR (Status)) {
+    //
+    // Locate BlockIo2 protocol
+    //
+    Status = gBS->OpenProtocol (
+                    Handle,
+                    &gEfiBlockIo2ProtocolGuid,
+                    (VOID **) &BlockIo2,
+                    This->DriverBindingHandle,
+                    Controller,
+                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                    );
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+  }
+
+  //
+  // Get AtaDevice data.
+  //
+  if (BlockIo != NULL) {
+    AtaDevice = ATA_DEVICE_FROM_BLOCK_IO (BlockIo);
+  } else {
+    ASSERT (BlockIo2 != NULL);
+    AtaDevice = ATA_DEVICE_FROM_BLOCK_IO2 (BlockIo2);
+  }
+
+  //
+  // Close the child handle
+  //
+  gBS->CloseProtocol (
+         Controller,
+         &gEfiAtaPassThruProtocolGuid,
+         This->DriverBindingHandle,
+         Handle
+         );
+
+  //
+  // The Ata Bus driver installs the BlockIo and BlockIo2 in the DriverBindingStart().
+  // Here should uninstall both of them.
+  //
+  Status = gBS->UninstallMultipleProtocolInterfaces (
+                  Handle,
+                  &gEfiDevicePathProtocolGuid,
+                  AtaDevice->DevicePath,
+                  &gEfiBlockIoProtocolGuid,
+                  &AtaDevice->BlockIo,
+                  &gEfiBlockIo2ProtocolGuid,
+                  &AtaDevice->BlockIo2,
+                  &gEfiDiskInfoProtocolGuid,
+                  &AtaDevice->DiskInfo,
+                  NULL
+                  );
+
+  if (EFI_ERROR (Status)) {
+    gBS->OpenProtocol (
+          Controller,
+          &gEfiAtaPassThruProtocolGuid,
+          (VOID **) &AtaPassThru,
+          This->DriverBindingHandle,
+          Handle,
+          EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+          );
+    return Status;
+  }
+
+  //
+  // If Storage Security Command Protocol is installed, then uninstall this protocol.
+  //
+  Status = gBS->OpenProtocol (
+                  Handle,
+                  &gEfiStorageSecurityCommandProtocolGuid,
+                  (VOID **) &StorageSecurity,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                  );
+
+  if (!EFI_ERROR (Status)) {
+    Status = gBS->UninstallProtocolInterface (
+                    Handle,
+                    &gEfiStorageSecurityCommandProtocolGuid,
+                    &AtaDevice->StorageSecurity
+                    );
+    if (EFI_ERROR (Status)) {
+      gBS->OpenProtocol (
+        Controller,
+        &gEfiAtaPassThruProtocolGuid,
+        (VOID **) &AtaPassThru,
+        This->DriverBindingHandle,
+        Handle,
+        EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+        );
+      return Status;
+    }
+  }
+
+  ReleaseAtaResources (AtaDevice);
+  return EFI_SUCCESS;
+}
+
+
+
+/**
+  Tests to see if this driver supports a given controller. If a child device is provided,
+  it further tests to see if this driver supports creating a handle for the specified child device.
+
+  This function checks to see if the driver specified by This supports the device specified by
+  ControllerHandle. Drivers will typically use the device path attached to
+  ControllerHandle and/or the services from the bus I/O abstraction attached to
+  ControllerHandle to determine if the driver supports ControllerHandle. This function
+  may be called many times during platform initialization. In order to reduce boot times, the tests
+  performed by this function must be very small, and take as little time as possible to execute. This
+  function must not change the state of any hardware devices, and this function must be aware that the
+  device specified by ControllerHandle may already be managed by the same driver or a
+  different driver. This function must match its calls to AllocatePages() with FreePages(),
+  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+  Since ControllerHandle may have been previously started by the same driver, if a protocol is
+  already in the opened state, then it must not be closed with CloseProtocol(). This is required
+  to guarantee the state of ControllerHandle is not modified by this function.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to test. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For bus drivers, if this parameter is not NULL, then
+                                   the bus driver must determine if the bus controller specified
+                                   by ControllerHandle and the child controller specified
+                                   by RemainingDevicePath are both supported by this
+                                   bus driver.
+
+  @retval EFI_SUCCESS              The device specified by ControllerHandle and
+                                   RemainingDevicePath is supported by the driver specified by This.
+  @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by the driver
+                                   specified by This.
+  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by a different
+                                   driver or an application that requires exclusive access.
+                                   Currently not implemented.
+  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
+                                   RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+AtaBusDriverBindingSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
+  )
+{
+  EFI_STATUS                        Status;
+  EFI_DEVICE_PATH_PROTOCOL          *ParentDevicePath;
+  EFI_ATA_PASS_THRU_PROTOCOL        *AtaPassThru;
+  UINT16                            Port;
+  UINT16                            PortMultiplierPort;
+
+  //
+  // Test EFI_ATA_PASS_THRU_PROTOCOL on controller handle.
+  //
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiAtaPassThruProtocolGuid,
+                  (VOID **) &AtaPassThru,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_BY_DRIVER
+                  );
+
+  if (Status == EFI_ALREADY_STARTED) {
+    return EFI_SUCCESS;
+  }
+
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Test to see if this ATA Pass Thru Protocol is for a LOGICAL channel
+  //
+  if ((AtaPassThru->Mode->Attributes & EFI_ATA_PASS_THRU_ATTRIBUTES_LOGICAL) == 0) {
+    //
+    // Close the I/O Abstraction(s) used to perform the supported test
+    //
+    gBS->CloseProtocol (
+          Controller,
+          &gEfiAtaPassThruProtocolGuid,
+          This->DriverBindingHandle,
+          Controller
+          );
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Test RemainingDevicePath is valid or not.
+  //
+  if ((RemainingDevicePath != NULL) && !IsDevicePathEnd (RemainingDevicePath)) {
+    Status = AtaPassThru->GetDevice (AtaPassThru, RemainingDevicePath, &Port, &PortMultiplierPort);
+    if (EFI_ERROR (Status)) {
+      //
+      // Close the I/O Abstraction(s) used to perform the supported test
+      //
+      gBS->CloseProtocol (
+            Controller,
+            &gEfiAtaPassThruProtocolGuid,
+            This->DriverBindingHandle,
+            Controller
+            );
+      return Status;
+    }
+  }
+
+  //
+  // Close the I/O Abstraction(s) used to perform the supported test
+  //
+  gBS->CloseProtocol (
+        Controller,
+        &gEfiAtaPassThruProtocolGuid,
+        This->DriverBindingHandle,
+        Controller
+        );
+
+  //
+  // Open the EFI Device Path protocol needed to perform the supported test
+  //
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiDevicePathProtocolGuid,
+                  (VOID **) &ParentDevicePath,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                  );
+  return Status;
+}
+
+
+/**
+  Starts a device controller or a bus controller.
+
+  The Start() function is designed to be invoked from the EFI boot service ConnectController().
+  As a result, much of the error checking on the parameters to Start() has been moved into this
+  common boot service. It is legal to call Start() from other locations,
+  but the following calling restrictions must be followed or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE.
+  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+     EFI_DEVICE_PATH_PROTOCOL.
+  3. Prior to calling Start(), the Supported() function for the driver specified by This must
+     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to start. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For a bus driver, if this parameter is NULL, then handles
+                                   for all the children of Controller are created by this driver.
+                                   If this parameter is not NULL and the first Device Path Node is
+                                   not the End of Device Path Node, then only the handle for the
+                                   child device specified by the first Device Path Node of
+                                   RemainingDevicePath is created by this driver.
+                                   If the first Device Path Node of RemainingDevicePath is
+                                   the End of Device Path Node, no child handle is created by this
+                                   driver.
+
+  @retval EFI_SUCCESS              The device was started.
+  @retval EFI_DEVICE_ERROR         The device could not be started due to a device error.Currently not implemented.
+  @retval EFI_OUT_OF_RESOURCES     The request could not be completed due to a lack of resources.
+  @retval Others                   The driver failed to start the device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusDriverBindingStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
+  )
+{
+  EFI_STATUS                        Status;
+  EFI_ATA_PASS_THRU_PROTOCOL        *AtaPassThru;
+  EFI_DEVICE_PATH_PROTOCOL          *ParentDevicePath;
+  ATA_BUS_DRIVER_DATA               *AtaBusDriverData;
+  UINT16                            Port;
+  UINT16                            PortMultiplierPort;
+
+  AtaBusDriverData = NULL;
+
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiDevicePathProtocolGuid,
+                  (VOID **) &ParentDevicePath,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                  );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Report Status Code to indicate ATA bus starts
+  //
+  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
+    EFI_PROGRESS_CODE,
+    (EFI_IO_BUS_ATA_ATAPI | EFI_IOB_PC_INIT),
+    ParentDevicePath
+    );
+
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiAtaPassThruProtocolGuid,
+                  (VOID **) &AtaPassThru,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_BY_DRIVER
+                  );
+  if ((EFI_ERROR (Status)) && (Status != EFI_ALREADY_STARTED)) {
+    goto ErrorExit;
+  }
+
+  //
+  // Check EFI_ALREADY_STARTED to reuse the original ATA_BUS_DRIVER_DATA.
+  //
+  if (Status != EFI_ALREADY_STARTED) {
+    AtaBusDriverData = AllocateZeroPool (sizeof (ATA_BUS_DRIVER_DATA));
+    if (AtaBusDriverData == NULL) {
+      Status = EFI_OUT_OF_RESOURCES;
+      goto ErrorExit;
+    }
+
+    AtaBusDriverData->AtaPassThru = AtaPassThru;
+    AtaBusDriverData->Controller  = Controller;
+    AtaBusDriverData->ParentDevicePath = ParentDevicePath;
+    AtaBusDriverData->DriverBindingHandle = This->DriverBindingHandle;
+
+    Status = gBS->InstallMultipleProtocolInterfaces (
+                    &Controller,
+                    &gEfiCallerIdGuid,
+                    AtaBusDriverData,
+                    NULL
+                    );
+    if (EFI_ERROR (Status)) {
+      goto ErrorExit;
+    }
+
+  } else {
+    Status = gBS->OpenProtocol (
+                    Controller,
+                    &gEfiCallerIdGuid,
+                    (VOID **) &AtaBusDriverData,
+                    This->DriverBindingHandle,
+                    Controller,
+                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                    );
+    if (EFI_ERROR (Status)) {
+      AtaBusDriverData = NULL;
+      goto ErrorExit;
+    }
+  }
+
+  //
+  // Report Status Code to indicate detecting devices on bus
+  //
+  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
+    EFI_PROGRESS_CODE,
+    (EFI_IO_BUS_ATA_ATAPI | EFI_IOB_PC_DETECT),
+    ParentDevicePath
+    );
+
+  if (RemainingDevicePath == NULL) {
+    Port = 0xFFFF;
+    while (TRUE) {
+      Status = AtaPassThru->GetNextPort (AtaPassThru, &Port);
+      if (EFI_ERROR (Status)) {
+        //
+        // We cannot find more legal port then we are done.
+        //
+        break;
+      }
+
+      PortMultiplierPort = 0xFFFF;
+      while (TRUE) {
+        Status = AtaPassThru->GetNextDevice (AtaPassThru, Port, &PortMultiplierPort);
+        if (EFI_ERROR (Status)) {
+          //
+          // We cannot find more legal port multiplier port number for ATA device
+          // on the port, then we are done.
+          //
+          break;
+        }
+        RegisterAtaDevice (AtaBusDriverData, Port, PortMultiplierPort);
+      }
+    }
+    Status = EFI_SUCCESS;
+  } else if (!IsDevicePathEnd (RemainingDevicePath)) {
+    Status = AtaPassThru->GetDevice (AtaPassThru, RemainingDevicePath, &Port, &PortMultiplierPort);
+    if (!EFI_ERROR (Status)) {
+      Status = RegisterAtaDevice (AtaBusDriverData,Port, PortMultiplierPort);
+    }
+  }
+
+  return Status;
+
+ErrorExit:
+
+  if (AtaBusDriverData != NULL) {
+    gBS->UninstallMultipleProtocolInterfaces (
+           Controller,
+           &gEfiCallerIdGuid,
+           AtaBusDriverData,
+           NULL
+           );
+    FreePool (AtaBusDriverData);
+  }
+
+  gBS->CloseProtocol (
+        Controller,
+        &gEfiAtaPassThruProtocolGuid,
+        This->DriverBindingHandle,
+        Controller
+        );
+
+  return Status;
+
+}
+
+
+/**
+  Stops a device controller or a bus controller.
+
+  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+  As a result, much of the error checking on the parameters to Stop() has been moved
+  into this common boot service. It is legal to call Stop() from other locations,
+  but the following calling restrictions must be followed or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+     same driver's Start() function.
+  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+     EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+     Start() function, and the Start() function must have called OpenProtocol() on
+     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
+                                support a bus specific I/O protocol for the driver
+                                to use to stop the device.
+  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.
+  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
+                                if NumberOfChildren is 0.
+
+  @retval EFI_SUCCESS           The device was stopped.
+  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusDriverBindingStop (
+  IN  EFI_DRIVER_BINDING_PROTOCOL     *This,
+  IN  EFI_HANDLE                      Controller,
+  IN  UINTN                           NumberOfChildren,
+  IN  EFI_HANDLE                      *ChildHandleBuffer
+  )
+{
+  EFI_STATUS                  Status;
+  BOOLEAN                     AllChildrenStopped;
+  UINTN                       Index;
+  ATA_BUS_DRIVER_DATA         *AtaBusDriverData;
+
+  if (NumberOfChildren == 0) {
+    Status = gBS->OpenProtocol (
+                    Controller,
+                    &gEfiCallerIdGuid,
+                    (VOID **) &AtaBusDriverData,
+                    This->DriverBindingHandle,
+                    Controller,
+                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                    );
+    if (!EFI_ERROR (Status)) {
+      gBS->UninstallMultipleProtocolInterfaces (
+            Controller,
+            &gEfiCallerIdGuid,
+            AtaBusDriverData,
+            NULL
+            );
+      FreePool (AtaBusDriverData);
+    }
+
+    gBS->CloseProtocol (
+          Controller,
+          &gEfiAtaPassThruProtocolGuid,
+          This->DriverBindingHandle,
+          Controller
+          );
+
+    return EFI_SUCCESS;
+  }
+
+  AllChildrenStopped = TRUE;
+
+  for (Index = 0; Index < NumberOfChildren; Index++) {
+
+    Status = UnregisterAtaDevice (This, Controller, ChildHandleBuffer[Index]);
+    if (EFI_ERROR (Status)) {
+      AllChildrenStopped = FALSE;
+    }
+  }
+
+  if (!AllChildrenStopped) {
+    return EFI_DEVICE_ERROR;
+  }
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Reset the Block Device.
+
+  @param  This                 Indicates a pointer to the calling context.
+  @param  ExtendedVerification Driver may perform diagnostics on reset.
+
+  @retval EFI_SUCCESS          The device was reset.
+  @retval EFI_DEVICE_ERROR     The device is not functioning properly and could
+                               not be reset.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoReset (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This,
+  IN  BOOLEAN                 ExtendedVerification
+  )
+{
+  EFI_STATUS      Status;
+  ATA_DEVICE      *AtaDevice;
+  EFI_TPL         OldTpl;
+
+  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+  AtaDevice = ATA_DEVICE_FROM_BLOCK_IO (This);
+
+  Status = ResetAtaDevice (AtaDevice);
+
+  if (EFI_ERROR (Status)) {
+    Status = EFI_DEVICE_ERROR;
+  }
+
+  gBS->RestoreTPL (OldTpl);
+  return Status;
+}
+
+
+/**
+  Read/Write BufferSize bytes from Lba from/into Buffer.
+
+  @param[in]       This       Indicates a pointer to the calling context. Either be
+                              block I/O or block I/O2.
+  @param[in]       MediaId    The media ID that the read/write request is for.
+  @param[in]       Lba        The starting logical block address to be read/written.
+                              The caller is responsible for reading/writing to only
+                              legitimate locations.
+  @param[in, out]  Token      A pointer to the token associated with the transaction.
+  @param[in]       BufferSize Size of Buffer, must be a multiple of device block size.
+  @param[out]      Buffer     A pointer to the destination/source buffer for the data.
+  @param[in]       IsBlockIo2 Indicate the calling is from BlockIO or BlockIO2. TRUE is
+                              from BlockIO2, FALSE is for BlockIO.
+  @param[in]       IsWrite    Indicates whether it is a write operation.
+
+  @retval EFI_SUCCESS           The data was read/written correctly to the device.
+  @retval EFI_WRITE_PROTECTED   The device can not be read/written to.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing the read/write.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
+  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.
+  @retval EFI_INVALID_PARAMETER The read/write request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+
+**/
+EFI_STATUS
+BlockIoReadWrite (
+  IN     VOID                    *This,
+  IN     UINT32                  MediaId,
+  IN     EFI_LBA                 Lba,
+  IN OUT EFI_BLOCK_IO2_TOKEN     *Token,
+  IN     UINTN                   BufferSize,
+  OUT    VOID                    *Buffer,
+  IN     BOOLEAN                 IsBlockIo2,
+  IN     BOOLEAN                 IsWrite
+  )
+{
+  ATA_DEVICE                        *AtaDevice;
+  EFI_STATUS                        Status;
+  EFI_TPL                           OldTpl;
+  EFI_BLOCK_IO_MEDIA                *Media;
+  UINTN                             BlockSize;
+  UINTN                             NumberOfBlocks;
+  UINTN                             IoAlign;
+
+  if (IsBlockIo2) {
+   Media     = ((EFI_BLOCK_IO2_PROTOCOL *) This)->Media;
+   AtaDevice = ATA_DEVICE_FROM_BLOCK_IO2 (This);
+  } else {
+   Media     = ((EFI_BLOCK_IO_PROTOCOL *) This)->Media;
+   AtaDevice = ATA_DEVICE_FROM_BLOCK_IO (This);
+  }
+
+  if (MediaId != Media->MediaId) {
+    return EFI_MEDIA_CHANGED;
+  }
+
+  //
+  // Check parameters.
+  //
+  if (Buffer == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  if (BufferSize == 0) {
+    if ((Token != NULL) && (Token->Event != NULL)) {
+      Token->TransactionStatus = EFI_SUCCESS;
+      gBS->SignalEvent (Token->Event);
+    }
+    return EFI_SUCCESS;
+  }
+
+  BlockSize = Media->BlockSize;
+  if ((BufferSize % BlockSize) != 0) {
+    return EFI_BAD_BUFFER_SIZE;
+  }
+
+  NumberOfBlocks  = BufferSize / BlockSize;
+  if ((Lba + NumberOfBlocks - 1) > Media->LastBlock) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  IoAlign = Media->IoAlign;
+  if (IoAlign > 0 && (((UINTN) Buffer & (IoAlign - 1)) != 0)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+  //
+  // Invoke low level AtaDevice Access Routine.
+  //
+  Status = AccessAtaDevice (AtaDevice, Buffer, Lba, NumberOfBlocks, IsWrite, Token);
+
+  gBS->RestoreTPL (OldTpl);
+
+  return Status;
+}
+
+
+/**
+  Read BufferSize bytes from Lba into Buffer.
+
+  @param  This       Indicates a pointer to the calling context.
+  @param  MediaId    Id of the media, changes every time the media is replaced.
+  @param  Lba        The starting Logical Block Address to read from
+  @param  BufferSize Size of Buffer, must be a multiple of device block size.
+  @param  Buffer     A pointer to the destination buffer for the data. The caller is
+                     responsible for either having implicit or explicit ownership of the buffer.
+
+  @retval EFI_SUCCESS           The data was read correctly from the device.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing the read.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
+  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.
+  @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoReadBlocks (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN  UINTN                   BufferSize,
+  OUT VOID                    *Buffer
+  )
+{
+  return BlockIoReadWrite ((VOID *) This, MediaId, Lba, NULL, BufferSize, Buffer, FALSE, FALSE);
+}
+
+
+/**
+  Write BufferSize bytes from Lba into Buffer.
+
+  @param  This       Indicates a pointer to the calling context.
+  @param  MediaId    The media ID that the write request is for.
+  @param  Lba        The starting logical block address to be written. The caller is
+                     responsible for writing to only legitimate locations.
+  @param  BufferSize Size of Buffer, must be a multiple of device block size.
+  @param  Buffer     A pointer to the source buffer for the data.
+
+  @retval EFI_SUCCESS           The data was written correctly to the device.
+  @retval EFI_WRITE_PROTECTED   The device can not be written to.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing the write.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
+  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.
+  @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoWriteBlocks (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN  UINTN                   BufferSize,
+  IN  VOID                    *Buffer
+  )
+{
+  return BlockIoReadWrite ((VOID *) This, MediaId, Lba, NULL, BufferSize, Buffer, FALSE, TRUE);
+}
+
+
+/**
+  Flush the Block Device.
+
+  @param  This              Indicates a pointer to the calling context.
+
+  @retval EFI_SUCCESS       All outstanding data was written to the device
+  @retval EFI_DEVICE_ERROR  The device reported an error while writing back the data
+  @retval EFI_NO_MEDIA      There is no media in the device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoFlushBlocks (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This
+  )
+{
+  //
+  // return directly
+  //
+  return EFI_SUCCESS;
+}
+
+/**
+  Reset the Block Device.
+
+  @param[in]  This                 Indicates a pointer to the calling context.
+  @param[in]  ExtendedVerification Driver may perform diagnostics on reset.
+
+  @retval EFI_SUCCESS          The device was reset.
+  @retval EFI_DEVICE_ERROR     The device is not functioning properly and could
+                               not be reset.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoResetEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN  BOOLEAN                 ExtendedVerification
+  )
+{
+  EFI_STATUS      Status;
+  ATA_DEVICE      *AtaDevice;
+  EFI_TPL         OldTpl;
+
+  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+  AtaDevice = ATA_DEVICE_FROM_BLOCK_IO2 (This);
+
+  AtaTerminateNonBlockingTask (AtaDevice);
+
+  Status = ResetAtaDevice (AtaDevice);
+
+  if (EFI_ERROR (Status)) {
+    Status = EFI_DEVICE_ERROR;
+  }
+
+  gBS->RestoreTPL (OldTpl);
+  return Status;
+}
+
+/**
+  Read BufferSize bytes from Lba into Buffer.
+
+  @param[in]       This       Indicates a pointer to the calling context.
+  @param[in]       MediaId    Id of the media, changes every time the media is replaced.
+  @param[in]       Lba        The starting Logical Block Address to read from.
+  @param[in, out]  Token      A pointer to the token associated with the transaction.
+  @param[in]       BufferSize Size of Buffer, must be a multiple of device block size.
+  @param[out]      Buffer     A pointer to the destination buffer for the data. The caller is
+                              responsible for either having implicit or explicit ownership of the buffer.
+
+  @retval EFI_SUCCESS           The read request was queued if Event is not NULL.
+                                The data was read correctly from the device if
+                                the Event is NULL.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing
+                                the read.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId is not for the current media.
+  @retval EFI_BAD_BUFFER_SIZE   The BufferSize parameter is not a multiple of the
+                                intrinsic block size of the device.
+  @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+  @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack
+                                of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoReadBlocksEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN OUT EFI_BLOCK_IO2_TOKEN  *Token,
+  IN  UINTN                   BufferSize,
+  OUT VOID                    *Buffer
+  )
+{
+  return BlockIoReadWrite ((VOID *) This, MediaId, Lba, Token, BufferSize, Buffer, TRUE, FALSE);
+}
+
+
+/**
+  Write BufferSize bytes from Lba into Buffer.
+
+  @param[in]       This       Indicates a pointer to the calling context.
+  @param[in]       MediaId    The media ID that the write request is for.
+  @param[in]       Lba        The starting logical block address to be written. The
+                              caller is responsible for writing to only legitimate
+                              locations.
+  @param[in, out]  Token      A pointer to the token associated with the transaction.
+  @param[in]       BufferSize Size of Buffer, must be a multiple of device block size.
+  @param[in]       Buffer     A pointer to the source buffer for the data.
+
+  @retval EFI_SUCCESS           The data was written correctly to the device.
+  @retval EFI_WRITE_PROTECTED   The device can not be written to.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing the write.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
+  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.
+  @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoWriteBlocksEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN OUT EFI_BLOCK_IO2_TOKEN  *Token,
+  IN  UINTN                   BufferSize,
+  IN  VOID                    *Buffer
+  )
+{
+  return BlockIoReadWrite ((VOID *) This, MediaId, Lba, Token, BufferSize, Buffer, TRUE, TRUE);
+}
+
+
+/**
+  Flush the Block Device.
+
+  @param[in]       This       Indicates a pointer to the calling context.
+  @param[in, out]  Token      A pointer to the token associated with the transaction.
+
+  @retval EFI_SUCCESS       All outstanding data was written to the device
+  @retval EFI_DEVICE_ERROR  The device reported an error while writing back the data
+  @retval EFI_NO_MEDIA      There is no media in the device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoFlushBlocksEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN OUT EFI_BLOCK_IO2_TOKEN  *Token
+  )
+{
+  //
+  // Signal event and return directly.
+  //
+  if (Token != NULL && Token->Event != NULL) {
+    Token->TransactionStatus = EFI_SUCCESS;
+    gBS->SignalEvent (Token->Event);
+  }
+  return EFI_SUCCESS;
+}
+/**
+  Provides inquiry information for the controller type.
+
+  This function is used by the IDE bus driver to get inquiry data.  Data format
+  of Identify data is defined by the Interface GUID.
+
+  @param[in]      This             Pointer to the EFI_DISK_INFO_PROTOCOL instance.
+  @param[in, out] InquiryData      Pointer to a buffer for the inquiry data.
+  @param[in, out] InquiryDataSize  Pointer to the value for the inquiry data size.
+
+  @retval EFI_SUCCESS            The command was accepted without any errors.
+  @retval EFI_NOT_FOUND          Device does not support this data class
+  @retval EFI_DEVICE_ERROR       Error reading InquiryData from device
+  @retval EFI_BUFFER_TOO_SMALL   InquiryDataSize not big enough
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoInquiry (
+  IN     EFI_DISK_INFO_PROTOCOL   *This,
+  IN OUT VOID                     *InquiryData,
+  IN OUT UINT32                   *InquiryDataSize
+  )
+{
+  return EFI_NOT_FOUND;
+}
+
+
+/**
+  Provides identify information for the controller type.
+
+  This function is used by the IDE bus driver to get identify data.  Data format
+  of Identify data is defined by the Interface GUID.
+
+  @param[in]      This              Pointer to the EFI_DISK_INFO_PROTOCOL
+                                    instance.
+  @param[in, out] IdentifyData      Pointer to a buffer for the identify data.
+  @param[in, out] IdentifyDataSize  Pointer to the value for the identify data
+                                    size.
+
+  @retval EFI_SUCCESS            The command was accepted without any errors.
+  @retval EFI_NOT_FOUND          Device does not support this data class
+  @retval EFI_DEVICE_ERROR       Error reading IdentifyData from device
+  @retval EFI_BUFFER_TOO_SMALL   IdentifyDataSize not big enough
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoIdentify (
+  IN     EFI_DISK_INFO_PROTOCOL   *This,
+  IN OUT VOID                     *IdentifyData,
+  IN OUT UINT32                   *IdentifyDataSize
+  )
+{
+  EFI_STATUS                      Status;
+  ATA_DEVICE                      *AtaDevice;
+
+  AtaDevice = ATA_DEVICE_FROM_DISK_INFO (This);
+
+  Status = EFI_BUFFER_TOO_SMALL;
+  if (*IdentifyDataSize >= sizeof (ATA_IDENTIFY_DATA)) {
+    Status = EFI_SUCCESS;
+    CopyMem (IdentifyData, AtaDevice->IdentifyData, sizeof (ATA_IDENTIFY_DATA));
+  }
+  *IdentifyDataSize = sizeof (ATA_IDENTIFY_DATA);
+
+  return Status;
+}
+
+
+/**
+  Provides sense data information for the controller type.
+
+  This function is used by the IDE bus driver to get sense data.
+  Data format of Sense data is defined by the Interface GUID.
+
+  @param[in]      This             Pointer to the EFI_DISK_INFO_PROTOCOL instance.
+  @param[in, out] SenseData        Pointer to the SenseData.
+  @param[in, out] SenseDataSize    Size of SenseData in bytes.
+  @param[out]     SenseDataNumber  Pointer to the value for the sense data size.
+
+  @retval EFI_SUCCESS            The command was accepted without any errors.
+  @retval EFI_NOT_FOUND          Device does not support this data class.
+  @retval EFI_DEVICE_ERROR       Error reading SenseData from device.
+  @retval EFI_BUFFER_TOO_SMALL   SenseDataSize not big enough.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoSenseData (
+  IN     EFI_DISK_INFO_PROTOCOL   *This,
+  IN OUT VOID                     *SenseData,
+  IN OUT UINT32                   *SenseDataSize,
+  OUT    UINT8                    *SenseDataNumber
+  )
+{
+  return EFI_NOT_FOUND;
+}
+
+
+/**
+  This function is used by the IDE bus driver to get controller information.
+
+  @param[in]  This         Pointer to the EFI_DISK_INFO_PROTOCOL instance.
+  @param[out] IdeChannel   Pointer to the Ide Channel number.  Primary or secondary.
+  @param[out] IdeDevice    Pointer to the Ide Device number.  Master or slave.
+
+  @retval EFI_SUCCESS       IdeChannel and IdeDevice are valid.
+  @retval EFI_UNSUPPORTED   This is not an IDE device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoWhichIde (
+  IN  EFI_DISK_INFO_PROTOCOL   *This,
+  OUT UINT32                   *IdeChannel,
+  OUT UINT32                   *IdeDevice
+  )
+{
+  ATA_DEVICE                   *AtaDevice;
+
+  AtaDevice       = ATA_DEVICE_FROM_DISK_INFO (This);
+  *IdeChannel     = AtaDevice->Port;
+  *IdeDevice      = AtaDevice->PortMultiplierPort;
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Send a security protocol command to a device that receives data and/or the result
+  of one or more commands sent by SendData.
+
+  The ReceiveData function sends a security protocol command to the given MediaId.
+  The security protocol command sent is defined by SecurityProtocolId and contains
+  the security protocol specific data SecurityProtocolSpecificData. The function
+  returns the data from the security protocol command in PayloadBuffer.
+
+  For devices supporting the SCSI command set, the security protocol command is sent
+  using the SECURITY PROTOCOL IN command defined in SPC-4.
+
+  For devices supporting the ATA command set, the security protocol command is sent
+  using one of the TRUSTED RECEIVE commands defined in ATA8-ACS if PayloadBufferSize
+  is non-zero.
+
+  If the PayloadBufferSize is zero, the security protocol command is sent using the
+  Trusted Non-Data command defined in ATA8-ACS.
+
+  If PayloadBufferSize is too small to store the available data from the security
+  protocol command, the function shall copy PayloadBufferSize bytes into the
+  PayloadBuffer and return EFI_WARN_BUFFER_TOO_SMALL.
+
+  If PayloadBuffer or PayloadTransferSize is NULL and PayloadBufferSize is non-zero,
+  the function shall return EFI_INVALID_PARAMETER.
+
+  If the given MediaId does not support security protocol commands, the function shall
+  return EFI_UNSUPPORTED. If there is no media in the device, the function returns
+  EFI_NO_MEDIA. If the MediaId is not the ID for the current media in the device,
+  the function returns EFI_MEDIA_CHANGED.
+
+  If the security protocol fails to complete within the Timeout period, the function
+  shall return EFI_TIMEOUT.
+
+  If the security protocol command completes without an error, the function shall
+  return EFI_SUCCESS. If the security protocol command completes with an error, the
+  function shall return EFI_DEVICE_ERROR.
+
+  @param  This                         Indicates a pointer to the calling context.
+  @param  MediaId                      ID of the medium to receive data from.
+  @param  Timeout                      The timeout, in 100ns units, to use for the execution
+                                       of the security protocol command. A Timeout value of 0
+                                       means that this function will wait indefinitely for the
+                                       security protocol command to execute. If Timeout is greater
+                                       than zero, then this function will return EFI_TIMEOUT
+                                       if the time required to execute the receive data command
+                                       is greater than Timeout.
+  @param  SecurityProtocolId           The value of the "Security Protocol" parameter of
+                                       the security protocol command to be sent.
+  @param  SecurityProtocolSpecificData The value of the "Security Protocol Specific" parameter
+                                       of the security protocol command to be sent.
+  @param  PayloadBufferSize            Size in bytes of the payload data buffer.
+  @param  PayloadBuffer                A pointer to a destination buffer to store the security
+                                       protocol command specific payload data for the security
+                                       protocol command. The caller is responsible for having
+                                       either implicit or explicit ownership of the buffer.
+  @param  PayloadTransferSize          A pointer to a buffer to store the size in bytes of the
+                                       data written to the payload data buffer.
+
+  @retval EFI_SUCCESS                  The security protocol command completed successfully.
+  @retval EFI_WARN_BUFFER_TOO_SMALL    The PayloadBufferSize was too small to store the available
+                                       data from the device. The PayloadBuffer contains the truncated data.
+  @retval EFI_UNSUPPORTED              The given MediaId does not support security protocol commands.
+  @retval EFI_DEVICE_ERROR             The security protocol command completed with an error.
+  @retval EFI_NO_MEDIA                 There is no media in the device.
+  @retval EFI_MEDIA_CHANGED            The MediaId is not for the current media.
+  @retval EFI_INVALID_PARAMETER        The PayloadBuffer or PayloadTransferSize is NULL and
+                                       PayloadBufferSize is non-zero.
+  @retval EFI_TIMEOUT                  A timeout occurred while waiting for the security
+                                       protocol command to execute.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaStorageSecurityReceiveData (
+  IN EFI_STORAGE_SECURITY_COMMAND_PROTOCOL    *This,
+  IN UINT32                                   MediaId,
+  IN UINT64                                   Timeout,
+  IN UINT8                                    SecurityProtocolId,
+  IN UINT16                                   SecurityProtocolSpecificData,
+  IN UINTN                                    PayloadBufferSize,
+  OUT VOID                                    *PayloadBuffer,
+  OUT UINTN                                   *PayloadTransferSize
+  )
+{
+  EFI_STATUS                       Status;
+  ATA_DEVICE                       *Private;
+  EFI_TPL                          OldTpl;
+
+  DEBUG ((EFI_D_INFO, "EFI Storage Security Protocol - Read\n"));
+  if ((PayloadBuffer == NULL || PayloadTransferSize == NULL) && PayloadBufferSize != 0) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status  = EFI_SUCCESS;
+  Private = ATA_DEVICE_FROM_STORAGE_SECURITY (This);
+
+  if (MediaId != Private->BlockIo.Media->MediaId) {
+    return EFI_MEDIA_CHANGED;
+  }
+
+  if (!Private->BlockIo.Media->MediaPresent) {
+    return EFI_NO_MEDIA;
+  }
+
+  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+  Status = TrustTransferAtaDevice (
+             Private,
+             PayloadBuffer,
+             SecurityProtocolId,
+             SecurityProtocolSpecificData,
+             PayloadBufferSize,
+             FALSE,
+             Timeout,
+             PayloadTransferSize
+             );
+
+  gBS->RestoreTPL (OldTpl);
+  return Status;
+}
+
+/**
+  Send a security protocol command to a device.
+
+  The SendData function sends a security protocol command containing the payload
+  PayloadBuffer to the given MediaId. The security protocol command sent is
+  defined by SecurityProtocolId and contains the security protocol specific data
+  SecurityProtocolSpecificData. If the underlying protocol command requires a
+  specific padding for the command payload, the SendData function shall add padding
+  bytes to the command payload to satisfy the padding requirements.
+
+  For devices supporting the SCSI command set, the security protocol command is sent
+  using the SECURITY PROTOCOL OUT command defined in SPC-4.
+
+  For devices supporting the ATA command set, the security protocol command is sent
+  using one of the TRUSTED SEND commands defined in ATA8-ACS if PayloadBufferSize
+  is non-zero. If the PayloadBufferSize is zero, the security protocol command is
+  sent using the Trusted Non-Data command defined in ATA8-ACS.
+
+  If PayloadBuffer is NULL and PayloadBufferSize is non-zero, the function shall
+  return EFI_INVALID_PARAMETER.
+
+  If the given MediaId does not support security protocol commands, the function
+  shall return EFI_UNSUPPORTED. If there is no media in the device, the function
+  returns EFI_NO_MEDIA. If the MediaId is not the ID for the current media in the
+  device, the function returns EFI_MEDIA_CHANGED.
+
+  If the security protocol fails to complete within the Timeout period, the function
+  shall return EFI_TIMEOUT.
+
+  If the security protocol command completes without an error, the function shall return
+  EFI_SUCCESS. If the security protocol command completes with an error, the function
+  shall return EFI_DEVICE_ERROR.
+
+  @param  This                         Indicates a pointer to the calling context.
+  @param  MediaId                      ID of the medium to receive data from.
+  @param  Timeout                      The timeout, in 100ns units, to use for the execution
+                                       of the security protocol command. A Timeout value of 0
+                                       means that this function will wait indefinitely for the
+                                       security protocol command to execute. If Timeout is greater
+                                       than zero, then this function will return EFI_TIMEOUT
+                                       if the time required to execute the receive data command
+                                       is greater than Timeout.
+  @param  SecurityProtocolId           The value of the "Security Protocol" parameter of
+                                       the security protocol command to be sent.
+  @param  SecurityProtocolSpecificData The value of the "Security Protocol Specific" parameter
+                                       of the security protocol command to be sent.
+  @param  PayloadBufferSize            Size in bytes of the payload data buffer.
+  @param  PayloadBuffer                A pointer to a destination buffer to store the security
+                                       protocol command specific payload data for the security
+                                       protocol command.
+
+  @retval EFI_SUCCESS                  The security protocol command completed successfully.
+  @retval EFI_UNSUPPORTED              The given MediaId does not support security protocol commands.
+  @retval EFI_DEVICE_ERROR             The security protocol command completed with an error.
+  @retval EFI_NO_MEDIA                 There is no media in the device.
+  @retval EFI_MEDIA_CHANGED            The MediaId is not for the current media.
+  @retval EFI_INVALID_PARAMETER        The PayloadBuffer is NULL and PayloadBufferSize is non-zero.
+  @retval EFI_TIMEOUT                  A timeout occurred while waiting for the security
+                                       protocol command to execute.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaStorageSecuritySendData (
+  IN EFI_STORAGE_SECURITY_COMMAND_PROTOCOL    *This,
+  IN UINT32                                   MediaId,
+  IN UINT64                                   Timeout,
+  IN UINT8                                    SecurityProtocolId,
+  IN UINT16                                   SecurityProtocolSpecificData,
+  IN UINTN                                    PayloadBufferSize,
+  IN VOID                                     *PayloadBuffer
+  )
+{
+  EFI_STATUS                       Status;
+  ATA_DEVICE                       *Private;
+  EFI_TPL                          OldTpl;
+
+  DEBUG ((EFI_D_INFO, "EFI Storage Security Protocol - Send\n"));
+  if ((PayloadBuffer == NULL) && (PayloadBufferSize != 0)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status  = EFI_SUCCESS;
+  Private = ATA_DEVICE_FROM_STORAGE_SECURITY (This);
+
+  if (MediaId != Private->BlockIo.Media->MediaId) {
+    return EFI_MEDIA_CHANGED;
+  }
+
+  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+  Status = TrustTransferAtaDevice (
+             Private,
+             PayloadBuffer,
+             SecurityProtocolId,
+             SecurityProtocolSpecificData,
+             PayloadBufferSize,
+             TRUE,
+             Timeout,
+             NULL
+             );
+
+  gBS->RestoreTPL (OldTpl);
+  return Status;
+}
+
+/**
+  The user Entry Point for module AtaBus. The user code starts with this function.
+
+  @param[in] ImageHandle    The firmware allocated handle for the EFI image.
+  @param[in] SystemTable    A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS       The entry point is executed successfully.
+  @retval other             Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeAtaBus(
+  IN EFI_HANDLE           ImageHandle,
+  IN EFI_SYSTEM_TABLE     *SystemTable
+  )
+{
+  EFI_STATUS              Status;
+
+  //
+  // Install driver model protocol(s).
+  //
+  Status = EfiLibInstallDriverBindingComponentName2 (
+             ImageHandle,
+             SystemTable,
+             &gAtaBusDriverBinding,
+             ImageHandle,
+             &gAtaBusComponentName,
+             &gAtaBusComponentName2
+             );
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
+
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.h b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.h
new file mode 100644
index 00000000..73a926ad
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBus.h
@@ -0,0 +1,1075 @@
+/** @file
+  Master header file for ATA Bus Driver.
+
+  This file defines common data structures, macro definitions and some module
+  internal function header files.
+
+  Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _ATA_BUS_H_
+#define _ATA_BUS_H_
+
+#include <Uefi.h>
+
+#include <Protocol/AtaPassThru.h>
+#include <Protocol/BlockIo.h>
+#include <Protocol/BlockIo2.h>
+#include <Protocol/DiskInfo.h>
+#include <Protocol/DevicePath.h>
+#include <Protocol/StorageSecurityCommand.h>
+
+#include <Library/DebugLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/BaseLib.h>
+#include <Library/UefiLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/TimerLib.h>
+#include <Library/ReportStatusCodeLib.h>
+
+#include <IndustryStandard/Atapi.h>
+
+//
+// Time out value for ATA pass through protocol
+//
+#define ATA_TIMEOUT                       EFI_TIMER_PERIOD_SECONDS (3)
+
+//
+// Maximum number of times to retry ATA command
+//
+#define MAX_RETRY_TIMES                   3
+
+//
+// The maximum total sectors count in 28 bit addressing mode
+//
+#define MAX_28BIT_ADDRESSING_CAPACITY     0xfffffff
+
+//
+// The maximum ATA transaction sector count in 28 bit addressing mode.
+//
+#define MAX_28BIT_TRANSFER_BLOCK_NUM      0x100
+
+//
+// The maximum ATA transaction sector count in 48 bit addressing mode.
+//
+//#define MAX_48BIT_TRANSFER_BLOCK_NUM      0x10000
+
+//
+// BugBug: if the TransferLength is equal with 0x10000 (the 48bit max length),
+// there is a bug that even the register interrupt bit has been sit, the buffer
+// seems not ready. Change the Maximum Sector Numbers to 0xFFFF to work round
+// this issue.
+//
+#define MAX_48BIT_TRANSFER_BLOCK_NUM      0xFFFF
+
+//
+// The maximum model name in ATA identify data
+//
+#define MAX_MODEL_NAME_LEN                40
+
+#define ATA_TASK_SIGNATURE                SIGNATURE_32 ('A', 'T', 'S', 'K')
+#define ATA_DEVICE_SIGNATURE              SIGNATURE_32 ('A', 'B', 'I', 'D')
+#define ATA_SUB_TASK_SIGNATURE            SIGNATURE_32 ('A', 'S', 'T', 'S')
+#define IS_ALIGNED(addr, size)            (((UINTN) (addr) & (size - 1)) == 0)
+
+//
+// ATA bus data structure for ATA controller
+//
+typedef struct {
+  EFI_ATA_PASS_THRU_PROTOCOL  *AtaPassThru;
+  EFI_HANDLE                  Controller;
+  EFI_DEVICE_PATH_PROTOCOL    *ParentDevicePath;
+  EFI_HANDLE                  DriverBindingHandle;
+} ATA_BUS_DRIVER_DATA;
+
+//
+// ATA device data structure for each child device
+//
+typedef struct {
+  UINT32                                Signature;
+
+  EFI_HANDLE                            Handle;
+  EFI_BLOCK_IO_PROTOCOL                 BlockIo;
+  EFI_BLOCK_IO2_PROTOCOL                BlockIo2;
+  EFI_BLOCK_IO_MEDIA                    BlockMedia;
+  EFI_DISK_INFO_PROTOCOL                DiskInfo;
+  EFI_DEVICE_PATH_PROTOCOL              *DevicePath;
+  EFI_STORAGE_SECURITY_COMMAND_PROTOCOL StorageSecurity;
+
+  ATA_BUS_DRIVER_DATA                   *AtaBusDriverData;
+  UINT16                                Port;
+  UINT16                                PortMultiplierPort;
+
+  //
+  // Buffer for the execution of ATA pass through protocol
+  //
+  EFI_ATA_PASS_THRU_COMMAND_PACKET      Packet;
+  EFI_ATA_COMMAND_BLOCK                 Acb;
+  EFI_ATA_STATUS_BLOCK                  *Asb;
+
+  BOOLEAN                               UdmaValid;
+  BOOLEAN                               Lba48Bit;
+
+  //
+  // Cached data for ATA identify data
+  //
+  ATA_IDENTIFY_DATA                     *IdentifyData;
+
+  EFI_UNICODE_STRING_TABLE              *ControllerNameTable;
+  CHAR16                                ModelName[MAX_MODEL_NAME_LEN + 1];
+
+  LIST_ENTRY                            AtaTaskList;
+  LIST_ENTRY                            AtaSubTaskList;
+  BOOLEAN                               Abort;
+} ATA_DEVICE;
+
+//
+// Sub-Task for the non blocking I/O
+//
+typedef struct {
+  UINT32                            Signature;
+  ATA_DEVICE                        *AtaDevice;
+  EFI_BLOCK_IO2_TOKEN               *Token;
+  UINTN                             *UnsignalledEventCount;
+  EFI_ATA_PASS_THRU_COMMAND_PACKET  Packet;
+  BOOLEAN                           *IsError;// Indicate whether meeting error during source allocation for new task.
+  LIST_ENTRY                        TaskEntry;
+} ATA_BUS_ASYN_SUB_TASK;
+
+//
+// Task for the non blocking I/O
+//
+typedef struct {
+  UINT32                            Signature;
+  EFI_BLOCK_IO2_TOKEN               *Token;
+  ATA_DEVICE                        *AtaDevice;
+  UINT8                             *Buffer;
+  EFI_LBA                           StartLba;
+  UINTN                             NumberOfBlocks;
+  BOOLEAN                           IsWrite;
+  LIST_ENTRY                        TaskEntry;
+} ATA_BUS_ASYN_TASK;
+
+#define ATA_DEVICE_FROM_BLOCK_IO(a)         CR (a, ATA_DEVICE, BlockIo, ATA_DEVICE_SIGNATURE)
+#define ATA_DEVICE_FROM_BLOCK_IO2(a)        CR (a, ATA_DEVICE, BlockIo2, ATA_DEVICE_SIGNATURE)
+#define ATA_DEVICE_FROM_DISK_INFO(a)        CR (a, ATA_DEVICE, DiskInfo, ATA_DEVICE_SIGNATURE)
+#define ATA_DEVICE_FROM_STORAGE_SECURITY(a) CR (a, ATA_DEVICE, StorageSecurity, ATA_DEVICE_SIGNATURE)
+#define ATA_ASYN_SUB_TASK_FROM_ENTRY(a)     CR (a, ATA_BUS_ASYN_SUB_TASK, TaskEntry, ATA_SUB_TASK_SIGNATURE)
+#define ATA_ASYN_TASK_FROM_ENTRY(a)         CR (a, ATA_BUS_ASYN_TASK, TaskEntry, ATA_TASK_SIGNATURE)
+
+//
+// Global Variables
+//
+extern EFI_DRIVER_BINDING_PROTOCOL        gAtaBusDriverBinding;
+extern EFI_COMPONENT_NAME_PROTOCOL        gAtaBusComponentName;
+extern EFI_COMPONENT_NAME2_PROTOCOL       gAtaBusComponentName2;
+
+/**
+  Allocates an aligned buffer for ATA device.
+
+  This function allocates an aligned buffer for the ATA device to perform
+  ATA pass through operations. The alignment requirement is from ATA pass
+  through interface.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+  @param  BufferSize        The request buffer size.
+
+  @return A pointer to the aligned buffer or NULL if the allocation fails.
+
+**/
+VOID *
+AllocateAlignedBuffer (
+  IN ATA_DEVICE               *AtaDevice,
+  IN UINTN                    BufferSize
+  );
+
+/**
+  Frees an aligned buffer for ATA device.
+
+  This function frees an aligned buffer for the ATA device to perform
+  ATA pass through operations.
+
+  @param  Buffer            The aligned buffer to be freed.
+  @param  BufferSize        The request buffer size.
+
+**/
+VOID
+FreeAlignedBuffer (
+  IN VOID                     *Buffer,
+  IN UINTN                    BufferSize
+  );
+
+/**
+  Free SubTask.
+
+  @param[in, out]  Task      Pointer to task to be freed.
+
+**/
+VOID
+EFIAPI
+FreeAtaSubTask (
+  IN OUT ATA_BUS_ASYN_SUB_TASK  *Task
+  );
+
+/**
+  Wrapper for EFI_ATA_PASS_THRU_PROTOCOL.ResetDevice().
+
+  This function wraps the ResetDevice() invocation for ATA pass through function
+  for an ATA device.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+  @return The return status from EFI_ATA_PASS_THRU_PROTOCOL.PassThru().
+
+**/
+EFI_STATUS
+ResetAtaDevice (
+  IN ATA_DEVICE                           *AtaDevice
+  );
+
+
+/**
+  Discovers whether it is a valid ATA device.
+
+  This function issues ATA_CMD_IDENTIFY_DRIVE command to the ATA device to identify it.
+  If the command is executed successfully, it then identifies it and initializes
+  the Media information in Block IO protocol interface.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+  @retval EFI_SUCCESS       The device is successfully identified and Media information
+                            is correctly initialized.
+  @return others            Some error occurs when discovering the ATA device.
+
+**/
+EFI_STATUS
+DiscoverAtaDevice (
+  IN OUT ATA_DEVICE                 *AtaDevice
+  );
+
+/**
+  Read or write a number of blocks from ATA device.
+
+  This function performs ATA pass through transactions to read/write data from/to
+  ATA device. It may separate the read/write request into several ATA pass through
+  transactions.
+
+  @param[in, out]  AtaDevice       The ATA child device involved for the operation.
+  @param[in, out]  Buffer          The pointer to the current transaction buffer.
+  @param[in]       StartLba        The starting logical block address to be accessed.
+  @param[in]       NumberOfBlocks  The block number or sector count of the transfer.
+  @param[in]       IsWrite         Indicates whether it is a write operation.
+  @param[in, out]  Token           A pointer to the token associated with the transaction.
+
+  @retval EFI_SUCCESS       The data transfer is complete successfully.
+  @return others            Some error occurs when transferring data.
+
+**/
+EFI_STATUS
+AccessAtaDevice(
+  IN OUT ATA_DEVICE                 *AtaDevice,
+  IN OUT UINT8                      *Buffer,
+  IN EFI_LBA                        StartLba,
+  IN UINTN                          NumberOfBlocks,
+  IN BOOLEAN                        IsWrite,
+  IN OUT EFI_BLOCK_IO2_TOKEN        *Token
+  );
+
+/**
+  Trust transfer data from/to ATA device.
+
+  This function performs one ATA pass through transaction to do a trust transfer from/to
+  ATA device. It chooses the appropriate ATA command and protocol to invoke PassThru
+  interface of ATA pass through.
+
+  @param  AtaDevice                    The ATA child device involved for the operation.
+  @param  Buffer                       The pointer to the current transaction buffer.
+  @param  SecurityProtocolId           The value of the "Security Protocol" parameter of
+                                       the security protocol command to be sent.
+  @param  SecurityProtocolSpecificData The value of the "Security Protocol Specific" parameter
+                                       of the security protocol command to be sent.
+  @param  TransferLength               The block number or sector count of the transfer.
+  @param  IsTrustSend                  Indicates whether it is a trust send operation or not.
+  @param  Timeout                      The timeout, in 100ns units, to use for the execution
+                                       of the security protocol command. A Timeout value of 0
+                                       means that this function will wait indefinitely for the
+                                       security protocol command to execute. If Timeout is greater
+                                       than zero, then this function will return EFI_TIMEOUT
+                                       if the time required to execute the receive data command
+                                       is greater than Timeout.
+  @param  TransferLengthOut            A pointer to a buffer to store the size in bytes of the data
+                                       written to the buffer. Ignore it when IsTrustSend is TRUE.
+
+  @retval EFI_SUCCESS       The data transfer is complete successfully.
+  @return others            Some error occurs when transferring data.
+
+**/
+EFI_STATUS
+EFIAPI
+TrustTransferAtaDevice (
+  IN OUT ATA_DEVICE                 *AtaDevice,
+  IN OUT VOID                       *Buffer,
+  IN UINT8                          SecurityProtocolId,
+  IN UINT16                         SecurityProtocolSpecificData,
+  IN UINTN                          TransferLength,
+  IN BOOLEAN                        IsTrustSend,
+  IN UINT64                         Timeout,
+  OUT UINTN                         *TransferLengthOut
+  );
+
+//
+// Protocol interface prototypes
+//
+/**
+  Tests to see if this driver supports a given controller. If a child device is provided,
+  it further tests to see if this driver supports creating a handle for the specified child device.
+
+  This function checks to see if the driver specified by This supports the device specified by
+  ControllerHandle. Drivers will typically use the device path attached to
+  ControllerHandle and/or the services from the bus I/O abstraction attached to
+  ControllerHandle to determine if the driver supports ControllerHandle. This function
+  may be called many times during platform initialization. In order to reduce boot times, the tests
+  performed by this function must be very small, and take as little time as possible to execute. This
+  function must not change the state of any hardware devices, and this function must be aware that the
+  device specified by ControllerHandle may already be managed by the same driver or a
+  different driver. This function must match its calls to AllocatePages() with FreePages(),
+  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+  Since ControllerHandle may have been previously started by the same driver, if a protocol is
+  already in the opened state, then it must not be closed with CloseProtocol(). This is required
+  to guarantee the state of ControllerHandle is not modified by this function.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to test. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For bus drivers, if this parameter is not NULL, then
+                                   the bus driver must determine if the bus controller specified
+                                   by ControllerHandle and the child controller specified
+                                   by RemainingDevicePath are both supported by this
+                                   bus driver.
+
+  @retval EFI_SUCCESS              The device specified by ControllerHandle and
+                                   RemainingDevicePath is supported by the driver specified by This.
+  @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by the driver
+                                   specified by This.
+  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by a different
+                                   driver or an application that requires exclusive access.
+                                   Currently not implemented.
+  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
+                                   RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+AtaBusDriverBindingSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
+  );
+
+/**
+  Starts a device controller or a bus controller.
+
+  The Start() function is designed to be invoked from the EFI boot service ConnectController().
+  As a result, much of the error checking on the parameters to Start() has been moved into this
+  common boot service. It is legal to call Start() from other locations,
+  but the following calling restrictions must be followed or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE.
+  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+     EFI_DEVICE_PATH_PROTOCOL.
+  3. Prior to calling Start(), the Supported() function for the driver specified by This must
+     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to start. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For a bus driver, if this parameter is NULL, then handles
+                                   for all the children of Controller are created by this driver.
+                                   If this parameter is not NULL and the first Device Path Node is
+                                   not the End of Device Path Node, then only the handle for the
+                                   child device specified by the first Device Path Node of
+                                   RemainingDevicePath is created by this driver.
+                                   If the first Device Path Node of RemainingDevicePath is
+                                   the End of Device Path Node, no child handle is created by this
+                                   driver.
+
+  @retval EFI_SUCCESS              The device was started.
+  @retval EFI_DEVICE_ERROR         The device could not be started due to a device error.Currently not implemented.
+  @retval EFI_OUT_OF_RESOURCES     The request could not be completed due to a lack of resources.
+  @retval Others                   The driver failed to start the device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusDriverBindingStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
+  );
+
+/**
+  Stops a device controller or a bus controller.
+
+  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+  As a result, much of the error checking on the parameters to Stop() has been moved
+  into this common boot service. It is legal to call Stop() from other locations,
+  but the following calling restrictions must be followed or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+     same driver's Start() function.
+  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+     EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+     Start() function, and the Start() function must have called OpenProtocol() on
+     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
+                                support a bus specific I/O protocol for the driver
+                                to use to stop the device.
+  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.
+  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
+                                if NumberOfChildren is 0.
+
+  @retval EFI_SUCCESS           The device was stopped.
+  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusDriverBindingStop (
+  IN  EFI_DRIVER_BINDING_PROTOCOL     *This,
+  IN  EFI_HANDLE                      Controller,
+  IN  UINTN                           NumberOfChildren,
+  IN  EFI_HANDLE                      *ChildHandleBuffer
+  );
+
+
+/**
+  Retrieves a Unicode string that is the user readable name of the driver.
+
+  This function retrieves the user readable name of a driver in the form of a
+  Unicode string. If the driver specified by This has a user readable name in
+  the language specified by Language, then a pointer to the driver name is
+  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
+  by This does not support the language specified by Language,
+  then EFI_UNSUPPORTED is returned.
+
+  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+                                EFI_COMPONENT_NAME_PROTOCOL instance.
+
+  @param  Language[in]          A pointer to a Null-terminated ASCII string
+                                array indicating the language. This is the
+                                language of the driver name that the caller is
+                                requesting, and it must match one of the
+                                languages specified in SupportedLanguages. The
+                                number of languages supported by a driver is up
+                                to the driver writer. Language is specified
+                                in RFC 4646 or ISO 639-2 language code format.
+
+  @param  DriverName[out]       A pointer to the Unicode string to return.
+                                This Unicode string is the name of the
+                                driver specified by This in the language
+                                specified by Language.
+
+  @retval EFI_SUCCESS           The Unicode string for the Driver specified by
+                                This and the language specified by Language was
+                                returned in DriverName.
+
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+
+  @retval EFI_INVALID_PARAMETER DriverName is NULL.
+
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support
+                                the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusComponentNameGetDriverName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
+  IN  CHAR8                        *Language,
+  OUT CHAR16                       **DriverName
+  );
+
+
+/**
+  Retrieves a Unicode string that is the user readable name of the controller
+  that is being managed by a driver.
+
+  This function retrieves the user readable name of the controller specified by
+  ControllerHandle and ChildHandle in the form of a Unicode string. If the
+  driver specified by This has a user readable name in the language specified by
+  Language, then a pointer to the controller name is returned in ControllerName,
+  and EFI_SUCCESS is returned.  If the driver specified by This is not currently
+  managing the controller specified by ControllerHandle and ChildHandle,
+  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
+  support the language specified by Language, then EFI_UNSUPPORTED is returned.
+
+  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+                                EFI_COMPONENT_NAME_PROTOCOL instance.
+
+  @param  ControllerHandle[in]  The handle of a controller that the driver
+                                specified by This is managing.  This handle
+                                specifies the controller whose name is to be
+                                returned.
+
+  @param  ChildHandle[in]       The handle of the child controller to retrieve
+                                the name of.  This is an optional parameter that
+                                may be NULL.  It will be NULL for device
+                                drivers.  It will also be NULL for a bus drivers
+                                that wish to retrieve the name of the bus
+                                controller.  It will not be NULL for a bus
+                                driver that wishes to retrieve the name of a
+                                child controller.
+
+  @param  Language[in]          A pointer to a Null-terminated ASCII string
+                                array indicating the language.  This is the
+                                language of the driver name that the caller is
+                                requesting, and it must match one of the
+                                languages specified in SupportedLanguages. The
+                                number of languages supported by a driver is up
+                                to the driver writer. Language is specified in
+                                RFC 4646 or ISO 639-2 language code format.
+
+  @param  ControllerName[out]   A pointer to the Unicode string to return.
+                                This Unicode string is the name of the
+                                controller specified by ControllerHandle and
+                                ChildHandle in the language specified by
+                                Language from the point of view of the driver
+                                specified by This.
+
+  @retval EFI_SUCCESS           The Unicode string for the user readable name in
+                                the language specified by Language for the
+                                driver specified by This was returned in
+                                DriverName.
+
+  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
+
+  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
+                                EFI_HANDLE.
+
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+
+  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
+
+  @retval EFI_UNSUPPORTED       The driver specified by This is not currently
+                                managing the controller specified by
+                                ControllerHandle and ChildHandle.
+
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support
+                                the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusComponentNameGetControllerName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL                     *This,
+  IN  EFI_HANDLE                                      ControllerHandle,
+  IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,
+  IN  CHAR8                                           *Language,
+  OUT CHAR16                                          **ControllerName
+  );
+
+
+/**
+  Reset the Block Device.
+
+  @param  This                 Indicates a pointer to the calling context.
+  @param  ExtendedVerification Driver may perform diagnostics on reset.
+
+  @retval EFI_SUCCESS          The device was reset.
+  @retval EFI_DEVICE_ERROR     The device is not functioning properly and could
+                               not be reset.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoReset (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This,
+  IN  BOOLEAN                 ExtendedVerification
+  );
+
+
+/**
+  Read BufferSize bytes from Lba into Buffer.
+
+  @param  This       Indicates a pointer to the calling context.
+  @param  MediaId    Id of the media, changes every time the media is replaced.
+  @param  Lba        The starting Logical Block Address to read from
+  @param  BufferSize Size of Buffer, must be a multiple of device block size.
+  @param  Buffer     A pointer to the destination buffer for the data. The caller is
+                     responsible for either having implicit or explicit ownership of the buffer.
+
+  @retval EFI_SUCCESS           The data was read correctly from the device.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing the read.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
+  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.
+  @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoReadBlocks (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN  UINTN                   BufferSize,
+  OUT VOID                    *Buffer
+  );
+
+
+/**
+  Write BufferSize bytes from Lba into Buffer.
+
+  @param  This       Indicates a pointer to the calling context.
+  @param  MediaId    The media ID that the write request is for.
+  @param  Lba        The starting logical block address to be written. The caller is
+                     responsible for writing to only legitimate locations.
+  @param  BufferSize Size of Buffer, must be a multiple of device block size.
+  @param  Buffer     A pointer to the source buffer for the data.
+
+  @retval EFI_SUCCESS           The data was written correctly to the device.
+  @retval EFI_WRITE_PROTECTED   The device can not be written to.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing the write.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
+  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.
+  @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoWriteBlocks (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN  UINTN                   BufferSize,
+  IN  VOID                    *Buffer
+  );
+
+
+/**
+  Flush the Block Device.
+
+  @param  This              Indicates a pointer to the calling context.
+
+  @retval EFI_SUCCESS       All outstanding data was written to the device
+  @retval EFI_DEVICE_ERROR  The device reported an error while writing back the data
+  @retval EFI_NO_MEDIA      There is no media in the device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoFlushBlocks (
+  IN  EFI_BLOCK_IO_PROTOCOL   *This
+  );
+
+/**
+  Reset the Block Device through Block I/O2 protocol.
+
+  @param[in]  This                 Indicates a pointer to the calling context.
+  @param[in]  ExtendedVerification Driver may perform diagnostics on reset.
+
+  @retval EFI_SUCCESS          The device was reset.
+  @retval EFI_DEVICE_ERROR     The device is not functioning properly and could
+                               not be reset.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoResetEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN  BOOLEAN                 ExtendedVerification
+  );
+
+/**
+  Read BufferSize bytes from Lba into Buffer.
+
+  @param[in]       This       Indicates a pointer to the calling context.
+  @param[in]       MediaId    Id of the media, changes every time the media is replaced.
+  @param[in]       Lba        The starting Logical Block Address to read from.
+  @param[in, out]  Token      A pointer to the token associated with the transaction.
+  @param[in]       BufferSize Size of Buffer, must be a multiple of device block size.
+  @param[out]      Buffer     A pointer to the destination buffer for the data. The caller is
+                              responsible for either having implicit or explicit ownership of the buffer.
+
+  @retval EFI_SUCCESS           The read request was queued if Event is not NULL.
+                                The data was read correctly from the device if
+                                the Event is NULL.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing
+                                the read.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId is not for the current media.
+  @retval EFI_BAD_BUFFER_SIZE   The BufferSize parameter is not a multiple of the
+                                intrinsic block size of the device.
+  @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+  @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack
+                                of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoReadBlocksEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN OUT EFI_BLOCK_IO2_TOKEN  *Token,
+  IN  UINTN                   BufferSize,
+  OUT VOID                    *Buffer
+  );
+
+/**
+  Write BufferSize bytes from Lba into Buffer.
+
+  @param[in]       This       Indicates a pointer to the calling context.
+  @param[in]       MediaId    The media ID that the write request is for.
+  @param[in]       Lba        The starting logical block address to be written. The
+                              caller is responsible for writing to only legitimate
+                              locations.
+  @param[in, out]  Token      A pointer to the token associated with the transaction.
+  @param[in]       BufferSize Size of Buffer, must be a multiple of device block size.
+  @param[in]       Buffer     A pointer to the source buffer for the data.
+
+  @retval EFI_SUCCESS           The data was written correctly to the device.
+  @retval EFI_WRITE_PROTECTED   The device can not be written to.
+  @retval EFI_DEVICE_ERROR      The device reported an error while performing the write.
+  @retval EFI_NO_MEDIA          There is no media in the device.
+  @retval EFI_MEDIA_CHANGED     The MediaId does not match the current device.
+  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.
+  @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
+                                or the buffer is not on proper alignment.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoWriteBlocksEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN  UINT32                  MediaId,
+  IN  EFI_LBA                 Lba,
+  IN OUT EFI_BLOCK_IO2_TOKEN  *Token,
+  IN  UINTN                   BufferSize,
+  IN  VOID                    *Buffer
+  );
+
+/**
+  Flush the Block Device.
+
+  @param[in]       This       Indicates a pointer to the calling context.
+  @param[in, out]  Token      A pointer to the token associated with the transaction.
+
+  @retval EFI_SUCCESS       All outstanding data was written to the device
+  @retval EFI_DEVICE_ERROR  The device reported an error while writing back the data
+  @retval EFI_NO_MEDIA      There is no media in the device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBlockIoFlushBlocksEx (
+  IN  EFI_BLOCK_IO2_PROTOCOL  *This,
+  IN OUT EFI_BLOCK_IO2_TOKEN  *Token
+  );
+
+/**
+  Terminate any in-flight non-blocking I/O requests by signaling an EFI_ABORTED
+  in the TransactionStatus member of the EFI_BLOCK_IO2_TOKEN for the non-blocking
+  I/O. After that it is safe to free any Token or Buffer data structures that
+  were allocated to initiate the non-blockingI/O requests that were in-flight for
+  this device.
+
+  @param[in]  AtaDevice     The ATA child device involved for the operation.
+
+**/
+VOID
+EFIAPI
+AtaTerminateNonBlockingTask (
+  IN ATA_DEVICE               *AtaDevice
+  );
+
+/**
+  Provides inquiry information for the controller type.
+
+  This function is used by the IDE bus driver to get inquiry data.  Data format
+  of Identify data is defined by the Interface GUID.
+
+  @param[in]      This             Pointer to the EFI_DISK_INFO_PROTOCOL instance.
+  @param[in, out] InquiryData      Pointer to a buffer for the inquiry data.
+  @param[in, out] InquiryDataSize  Pointer to the value for the inquiry data size.
+
+  @retval EFI_SUCCESS            The command was accepted without any errors.
+  @retval EFI_NOT_FOUND          Device does not support this data class
+  @retval EFI_DEVICE_ERROR       Error reading InquiryData from device
+  @retval EFI_BUFFER_TOO_SMALL   InquiryDataSize not big enough
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoInquiry (
+  IN     EFI_DISK_INFO_PROTOCOL   *This,
+  IN OUT VOID                     *InquiryData,
+  IN OUT UINT32                   *InquiryDataSize
+  );
+
+
+/**
+  Provides identify information for the controller type.
+
+  This function is used by the IDE bus driver to get identify data.  Data format
+  of Identify data is defined by the Interface GUID.
+
+  @param[in]      This              Pointer to the EFI_DISK_INFO_PROTOCOL
+                                    instance.
+  @param[in, out] IdentifyData      Pointer to a buffer for the identify data.
+  @param[in, out] IdentifyDataSize  Pointer to the value for the identify data
+                                    size.
+
+  @retval EFI_SUCCESS            The command was accepted without any errors.
+  @retval EFI_NOT_FOUND          Device does not support this data class
+  @retval EFI_DEVICE_ERROR       Error reading IdentifyData from device
+  @retval EFI_BUFFER_TOO_SMALL   IdentifyDataSize not big enough
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoIdentify (
+  IN     EFI_DISK_INFO_PROTOCOL   *This,
+  IN OUT VOID                     *IdentifyData,
+  IN OUT UINT32                   *IdentifyDataSize
+  );
+
+
+/**
+  Provides sense data information for the controller type.
+
+  This function is used by the IDE bus driver to get sense data.
+  Data format of Sense data is defined by the Interface GUID.
+
+  @param[in]      This             Pointer to the EFI_DISK_INFO_PROTOCOL instance.
+  @param[in, out] SenseData        Pointer to the SenseData.
+  @param[in, out] SenseDataSize    Size of SenseData in bytes.
+  @param[out]     SenseDataNumber  Pointer to the value for the sense data size.
+
+  @retval EFI_SUCCESS            The command was accepted without any errors.
+  @retval EFI_NOT_FOUND          Device does not support this data class.
+  @retval EFI_DEVICE_ERROR       Error reading SenseData from device.
+  @retval EFI_BUFFER_TOO_SMALL   SenseDataSize not big enough.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoSenseData (
+  IN     EFI_DISK_INFO_PROTOCOL   *This,
+  IN OUT VOID                     *SenseData,
+  IN OUT UINT32                   *SenseDataSize,
+  OUT    UINT8                    *SenseDataNumber
+  );
+
+
+/**
+  This function is used by the IDE bus driver to get controller information.
+
+  @param[in]  This         Pointer to the EFI_DISK_INFO_PROTOCOL instance.
+  @param[out] IdeChannel   Pointer to the Ide Channel number.  Primary or secondary.
+  @param[out] IdeDevice    Pointer to the Ide Device number.  Master or slave.
+
+  @retval EFI_SUCCESS       IdeChannel and IdeDevice are valid.
+  @retval EFI_UNSUPPORTED   This is not an IDE device.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaDiskInfoWhichIde (
+  IN  EFI_DISK_INFO_PROTOCOL   *This,
+  OUT UINT32                   *IdeChannel,
+  OUT UINT32                   *IdeDevice
+  );
+
+/**
+  Send a security protocol command to a device that receives data and/or the result
+  of one or more commands sent by SendData.
+
+  The ReceiveData function sends a security protocol command to the given MediaId.
+  The security protocol command sent is defined by SecurityProtocolId and contains
+  the security protocol specific data SecurityProtocolSpecificData. The function
+  returns the data from the security protocol command in PayloadBuffer.
+
+  For devices supporting the SCSI command set, the security protocol command is sent
+  using the SECURITY PROTOCOL IN command defined in SPC-4.
+
+  For devices supporting the ATA command set, the security protocol command is sent
+  using one of the TRUSTED RECEIVE commands defined in ATA8-ACS if PayloadBufferSize
+  is non-zero.
+
+  If the PayloadBufferSize is zero, the security protocol command is sent using the
+  Trusted Non-Data command defined in ATA8-ACS.
+
+  If PayloadBufferSize is too small to store the available data from the security
+  protocol command, the function shall copy PayloadBufferSize bytes into the
+  PayloadBuffer and return EFI_WARN_BUFFER_TOO_SMALL.
+
+  If PayloadBuffer or PayloadTransferSize is NULL and PayloadBufferSize is non-zero,
+  the function shall return EFI_INVALID_PARAMETER.
+
+  If the given MediaId does not support security protocol commands, the function shall
+  return EFI_UNSUPPORTED. If there is no media in the device, the function returns
+  EFI_NO_MEDIA. If the MediaId is not the ID for the current media in the device,
+  the function returns EFI_MEDIA_CHANGED.
+
+  If the security protocol fails to complete within the Timeout period, the function
+  shall return EFI_TIMEOUT.
+
+  If the security protocol command completes without an error, the function shall
+  return EFI_SUCCESS. If the security protocol command completes with an error, the
+  function shall return EFI_DEVICE_ERROR.
+
+  @param  This                         Indicates a pointer to the calling context.
+  @param  MediaId                      ID of the medium to receive data from.
+  @param  Timeout                      The timeout, in 100ns units, to use for the execution
+                                       of the security protocol command. A Timeout value of 0
+                                       means that this function will wait indefinitely for the
+                                       security protocol command to execute. If Timeout is greater
+                                       than zero, then this function will return EFI_TIMEOUT
+                                       if the time required to execute the receive data command
+                                       is greater than Timeout.
+  @param  SecurityProtocolId           The value of the "Security Protocol" parameter of
+                                       the security protocol command to be sent.
+  @param  SecurityProtocolSpecificData The value of the "Security Protocol Specific" parameter
+                                       of the security protocol command to be sent.
+  @param  PayloadBufferSize            Size in bytes of the payload data buffer.
+  @param  PayloadBuffer                A pointer to a destination buffer to store the security
+                                       protocol command specific payload data for the security
+                                       protocol command. The caller is responsible for having
+                                       either implicit or explicit ownership of the buffer.
+  @param  PayloadTransferSize          A pointer to a buffer to store the size in bytes of the
+                                       data written to the payload data buffer.
+
+  @retval EFI_SUCCESS                  The security protocol command completed successfully.
+  @retval EFI_WARN_BUFFER_TOO_SMALL    The PayloadBufferSize was too small to store the available
+                                       data from the device. The PayloadBuffer contains the truncated data.
+  @retval EFI_UNSUPPORTED              The given MediaId does not support security protocol commands.
+  @retval EFI_DEVICE_ERROR             The security protocol command completed with an error.
+  @retval EFI_NO_MEDIA                 There is no media in the device.
+  @retval EFI_MEDIA_CHANGED            The MediaId is not for the current media.
+  @retval EFI_INVALID_PARAMETER        The PayloadBuffer or PayloadTransferSize is NULL and
+                                       PayloadBufferSize is non-zero.
+  @retval EFI_TIMEOUT                  A timeout occurred while waiting for the security
+                                       protocol command to execute.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaStorageSecurityReceiveData (
+  IN EFI_STORAGE_SECURITY_COMMAND_PROTOCOL    *This,
+  IN UINT32                                   MediaId,
+  IN UINT64                                   Timeout,
+  IN UINT8                                    SecurityProtocolId,
+  IN UINT16                                   SecurityProtocolSpecificData,
+  IN UINTN                                    PayloadBufferSize,
+  OUT VOID                                    *PayloadBuffer,
+  OUT UINTN                                   *PayloadTransferSize
+  );
+
+/**
+  Send a security protocol command to a device.
+
+  The SendData function sends a security protocol command containing the payload
+  PayloadBuffer to the given MediaId. The security protocol command sent is
+  defined by SecurityProtocolId and contains the security protocol specific data
+  SecurityProtocolSpecificData. If the underlying protocol command requires a
+  specific padding for the command payload, the SendData function shall add padding
+  bytes to the command payload to satisfy the padding requirements.
+
+  For devices supporting the SCSI command set, the security protocol command is sent
+  using the SECURITY PROTOCOL OUT command defined in SPC-4.
+
+  For devices supporting the ATA command set, the security protocol command is sent
+  using one of the TRUSTED SEND commands defined in ATA8-ACS if PayloadBufferSize
+  is non-zero. If the PayloadBufferSize is zero, the security protocol command is
+  sent using the Trusted Non-Data command defined in ATA8-ACS.
+
+  If PayloadBuffer is NULL and PayloadBufferSize is non-zero, the function shall
+  return EFI_INVALID_PARAMETER.
+
+  If the given MediaId does not support security protocol commands, the function
+  shall return EFI_UNSUPPORTED. If there is no media in the device, the function
+  returns EFI_NO_MEDIA. If the MediaId is not the ID for the current media in the
+  device, the function returns EFI_MEDIA_CHANGED.
+
+  If the security protocol fails to complete within the Timeout period, the function
+  shall return EFI_TIMEOUT.
+
+  If the security protocol command completes without an error, the function shall return
+  EFI_SUCCESS. If the security protocol command completes with an error, the function
+  shall return EFI_DEVICE_ERROR.
+
+  @param  This                         Indicates a pointer to the calling context.
+  @param  MediaId                      ID of the medium to receive data from.
+  @param  Timeout                      The timeout, in 100ns units, to use for the execution
+                                       of the security protocol command. A Timeout value of 0
+                                       means that this function will wait indefinitely for the
+                                       security protocol command to execute. If Timeout is greater
+                                       than zero, then this function will return EFI_TIMEOUT
+                                       if the time required to execute the receive data command
+                                       is greater than Timeout.
+  @param  SecurityProtocolId           The value of the "Security Protocol" parameter of
+                                       the security protocol command to be sent.
+  @param  SecurityProtocolSpecificData The value of the "Security Protocol Specific" parameter
+                                       of the security protocol command to be sent.
+  @param  PayloadBufferSize            Size in bytes of the payload data buffer.
+  @param  PayloadBuffer                A pointer to a destination buffer to store the security
+                                       protocol command specific payload data for the security
+                                       protocol command.
+
+  @retval EFI_SUCCESS                  The security protocol command completed successfully.
+  @retval EFI_UNSUPPORTED              The given MediaId does not support security protocol commands.
+  @retval EFI_DEVICE_ERROR             The security protocol command completed with an error.
+  @retval EFI_NO_MEDIA                 There is no media in the device.
+  @retval EFI_MEDIA_CHANGED            The MediaId is not for the current media.
+  @retval EFI_INVALID_PARAMETER        The PayloadBuffer is NULL and PayloadBufferSize is non-zero.
+  @retval EFI_TIMEOUT                  A timeout occurred while waiting for the security
+                                       protocol command to execute.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaStorageSecuritySendData (
+  IN EFI_STORAGE_SECURITY_COMMAND_PROTOCOL    *This,
+  IN UINT32                                   MediaId,
+  IN UINT64                                   Timeout,
+  IN UINT8                                    SecurityProtocolId,
+  IN UINT16                                   SecurityProtocolSpecificData,
+  IN UINTN                                    PayloadBufferSize,
+  IN VOID                                     *PayloadBuffer
+  );
+
+/**
+  Send TPer Reset command to reset eDrive to lock all protected bands.
+  Typically, there are 2 mechanism for resetting eDrive. They are:
+  1. TPer Reset through IEEE 1667 protocol.
+  2. TPer Reset through native TCG protocol.
+  This routine will detect what protocol the attached eDrive conform to, TCG or
+  IEEE 1667 protocol. Then send out TPer Reset command separately.
+
+  @param[in] AtaDevice    ATA_DEVICE pointer.
+
+**/
+VOID
+InitiateTPerReset (
+  IN   ATA_DEVICE       *AtaDevice
+  );
+
+#endif
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.inf b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.inf
new file mode 100644
index 00000000..a98281bd
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.inf
@@ -0,0 +1,71 @@
+## @file
+#  ATA Bus driver to enumerate and identify ATA devices.
+#
+#  This driver follows UEFI driver model and layers on ATA Pass Thru protocol defined
+#  in UEFI spec 2.2. It installs Block IO and Disk Info protocol for each ATA device
+#  it enumerates and identifies successfully.
+#
+#  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = AtaBusDxe
+  MODULE_UNI_FILE                = AtaBusDxe.uni
+  FILE_GUID                      = 19DF145A-B1D4-453f-8507-38816676D7F6
+  MODULE_TYPE                    = UEFI_DRIVER
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = InitializeAtaBus
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+#  DRIVER_BINDING                =  gAtaBusDriverBinding
+#  COMPONENT_NAME                =  gAtaBusComponentName
+#  COMPONENT_NAME2               =  gAtaBusComponentName2
+#
+#
+
+[Sources]
+  AtaBus.h
+  AtaBus.c
+  AtaPassThruExecute.c
+  ComponentName.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  DevicePathLib
+  UefiBootServicesTableLib
+  UefiRuntimeServicesTableLib
+  MemoryAllocationLib
+  BaseMemoryLib
+  UefiLib
+  BaseLib
+  UefiDriverEntryPoint
+  DebugLib
+  TimerLib
+  ReportStatusCodeLib
+
+[Guids]
+  gEfiDiskInfoAhciInterfaceGuid                 ## SOMETIMES_PRODUCES ## UNDEFINED
+
+[Protocols]
+  gEfiDiskInfoProtocolGuid                      ## BY_START
+  gEfiBlockIoProtocolGuid                       ## BY_START
+  gEfiBlockIo2ProtocolGuid                      ## BY_START
+  ## TO_START
+  ## BY_START
+  gEfiDevicePathProtocolGuid
+  gEfiAtaPassThruProtocolGuid                   ## TO_START
+  gEfiStorageSecurityCommandProtocolGuid        ## BY_START
+
+[UserExtensions.TianoCore."ExtraFiles"]
+  AtaBusDxeExtra.uni
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.uni b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.uni
new file mode 100644
index 00000000..ec4aab24
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.uni
@@ -0,0 +1,18 @@
+// /** @file

+// ATA Bus driver to enumerate and identify ATA devices.

+//

+// This driver follows UEFI driver model and layers on ATA Pass Thru protocol defined

+// in UEFI spec 2.2. It installs Block IO and Disk Info protocol for each ATA device

+// it enumerates and identifies successfully.

+//

+// Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>

+//

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

+//

+// **/

+

+

+#string STR_MODULE_ABSTRACT             #language en-US "ATA Bus driver to enumerate and identify ATA devices"

+

+#string STR_MODULE_DESCRIPTION          #language en-US "This driver follows the UEFI driver model and layers on the ATA Pass Thru protocol defined in UEFI Specification 2.2. It installs Block IO and Disk Info protocols for each ATA device it enumerates and identifies successfully."

+

diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxeExtra.uni b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxeExtra.uni
new file mode 100644
index 00000000..71372a9d
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxeExtra.uni
@@ -0,0 +1,14 @@
+// /** @file

+// AtaBusDxe Localized Strings and Content

+//

+// Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>

+//

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

+//

+// **/

+

+#string STR_PROPERTIES_MODULE_NAME

+#language en-US

+"ATA Bus DXE Driver"

+

+

diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaPassThruExecute.c b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaPassThruExecute.c
new file mode 100644
index 00000000..b333f24b
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/AtaPassThruExecute.c
@@ -0,0 +1,1067 @@
+/** @file
+  This file implements ATA pass through transaction for ATA bus driver.
+
+  This file implements the low level execution of ATA pass through transaction.
+  It transforms the high level identity, read/write, reset command to ATA pass
+  through command and protocol.
+
+  NOTE: This file also implements the StorageSecurityCommandProtocol(SSP). For input
+  parameter SecurityProtocolSpecificData, ATA spec has no explicitly definition
+  for Security Protocol Specific layout. This implementation uses big endian for
+  Cylinder register.
+
+  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+
+**/
+
+#include "AtaBus.h"
+
+#define ATA_CMD_TRUST_NON_DATA    0x5B
+#define ATA_CMD_TRUST_RECEIVE     0x5C
+#define ATA_CMD_TRUST_RECEIVE_DMA 0x5D
+#define ATA_CMD_TRUST_SEND        0x5E
+#define ATA_CMD_TRUST_SEND_DMA    0x5F
+
+//
+// Look up table (UdmaValid, IsWrite) for EFI_ATA_PASS_THRU_CMD_PROTOCOL
+//
+EFI_ATA_PASS_THRU_CMD_PROTOCOL mAtaPassThruCmdProtocols[][2] = {
+  {
+    EFI_ATA_PASS_THRU_PROTOCOL_PIO_DATA_IN,
+    EFI_ATA_PASS_THRU_PROTOCOL_PIO_DATA_OUT
+  },
+  {
+    EFI_ATA_PASS_THRU_PROTOCOL_UDMA_DATA_IN,
+    EFI_ATA_PASS_THRU_PROTOCOL_UDMA_DATA_OUT,
+  }
+};
+
+//
+// Look up table (UdmaValid, Lba48Bit, IsIsWrite) for ATA_CMD
+//
+UINT8 mAtaCommands[][2][2] = {
+  {
+    {
+      ATA_CMD_READ_SECTORS,            // 28-bit LBA; PIO read
+      ATA_CMD_WRITE_SECTORS            // 28-bit LBA; PIO write
+    },
+    {
+      ATA_CMD_READ_SECTORS_EXT,        // 48-bit LBA; PIO read
+      ATA_CMD_WRITE_SECTORS_EXT        // 48-bit LBA; PIO write
+    }
+  },
+  {
+    {
+      ATA_CMD_READ_DMA,                // 28-bit LBA; DMA read
+      ATA_CMD_WRITE_DMA                // 28-bit LBA; DMA write
+    },
+    {
+      ATA_CMD_READ_DMA_EXT,            // 48-bit LBA; DMA read
+      ATA_CMD_WRITE_DMA_EXT            // 48-bit LBA; DMA write
+    }
+  }
+};
+
+//
+// Look up table (UdmaValid, IsTrustSend) for ATA_CMD
+//
+UINT8 mAtaTrustCommands[2][2] = {
+  {
+    ATA_CMD_TRUST_RECEIVE,            // PIO read
+    ATA_CMD_TRUST_SEND                // PIO write
+  },
+  {
+    ATA_CMD_TRUST_RECEIVE_DMA,        // DMA read
+    ATA_CMD_TRUST_SEND_DMA            // DMA write
+  }
+};
+
+
+//
+// Look up table (Lba48Bit) for maximum transfer block number
+//
+UINTN mMaxTransferBlockNumber[] = {
+  MAX_28BIT_TRANSFER_BLOCK_NUM,
+  MAX_48BIT_TRANSFER_BLOCK_NUM
+};
+
+
+/**
+  Wrapper for EFI_ATA_PASS_THRU_PROTOCOL.PassThru().
+
+  This function wraps the PassThru() invocation for ATA pass through function
+  for an ATA device. It assembles the ATA pass through command packet for ATA
+  transaction.
+
+  @param[in, out]  AtaDevice   The ATA child device involved for the operation.
+  @param[in, out]  TaskPacket  Pointer to a Pass Thru Command Packet. Optional,
+                               if it is NULL, blocking mode, and use the packet
+                               in AtaDevice. If it is not NULL, non blocking mode,
+                               and pass down this Packet.
+  @param[in, out]  Event       If Event is NULL, then blocking I/O is performed.
+                               If Event is not NULL and non-blocking I/O is
+                               supported,then non-blocking I/O is performed,
+                               and Event will be signaled when the write
+                               request is completed.
+
+  @return The return status from EFI_ATA_PASS_THRU_PROTOCOL.PassThru().
+
+**/
+EFI_STATUS
+AtaDevicePassThru (
+  IN OUT ATA_DEVICE                       *AtaDevice,
+  IN OUT EFI_ATA_PASS_THRU_COMMAND_PACKET *TaskPacket, OPTIONAL
+  IN OUT EFI_EVENT                        Event OPTIONAL
+  )
+{
+  EFI_STATUS                              Status;
+  EFI_ATA_PASS_THRU_PROTOCOL              *AtaPassThru;
+  EFI_ATA_PASS_THRU_COMMAND_PACKET        *Packet;
+
+  //
+  // Assemble packet. If it is non blocking mode, the Ata driver should keep each
+  // subtask and clean them when the event is signaled.
+  //
+  if (TaskPacket != NULL) {
+    Packet = TaskPacket;
+    Packet->Asb = AllocateAlignedBuffer (AtaDevice, sizeof (EFI_ATA_STATUS_BLOCK));
+    if (Packet->Asb == NULL) {
+      return EFI_OUT_OF_RESOURCES;
+    }
+
+    CopyMem (Packet->Asb, AtaDevice->Asb, sizeof (EFI_ATA_STATUS_BLOCK));
+    Packet->Acb = AllocateCopyPool (sizeof (EFI_ATA_COMMAND_BLOCK), &AtaDevice->Acb);
+  } else {
+    Packet = &AtaDevice->Packet;
+    Packet->Asb = AtaDevice->Asb;
+    Packet->Acb = &AtaDevice->Acb;
+  }
+
+  AtaPassThru = AtaDevice->AtaBusDriverData->AtaPassThru;
+
+  Status = AtaPassThru->PassThru (
+                          AtaPassThru,
+                          AtaDevice->Port,
+                          AtaDevice->PortMultiplierPort,
+                          Packet,
+                          Event
+                          );
+  //
+  // Ensure ATA pass through caller and callee have the same
+  // interpretation of ATA pass through protocol.
+  //
+  ASSERT (Status != EFI_INVALID_PARAMETER);
+  ASSERT (Status != EFI_BAD_BUFFER_SIZE);
+
+  return Status;
+}
+
+
+/**
+  Wrapper for EFI_ATA_PASS_THRU_PROTOCOL.ResetDevice().
+
+  This function wraps the ResetDevice() invocation for ATA pass through function
+  for an ATA device.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+  @return The return status from EFI_ATA_PASS_THRU_PROTOCOL.PassThru().
+
+**/
+EFI_STATUS
+ResetAtaDevice (
+  IN ATA_DEVICE                           *AtaDevice
+  )
+{
+  EFI_ATA_PASS_THRU_PROTOCOL              *AtaPassThru;
+
+  AtaPassThru = AtaDevice->AtaBusDriverData->AtaPassThru;
+
+  //
+  // Report Status Code to indicate reset happens
+  //
+  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
+    EFI_PROGRESS_CODE,
+    (EFI_IO_BUS_ATA_ATAPI | EFI_IOB_PC_RESET),
+    AtaDevice->AtaBusDriverData->ParentDevicePath
+    );
+
+  return AtaPassThru->ResetDevice (
+                        AtaPassThru,
+                        AtaDevice->Port,
+                        AtaDevice->PortMultiplierPort
+                        );
+}
+
+
+/**
+  Prints ATA model name to ATA device structure.
+
+  This function converts ATA device model name from ATA identify data
+  to a string in ATA device structure. It needs to change the character
+  order in the original model name string.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+**/
+VOID
+PrintAtaModelName (
+  IN OUT ATA_DEVICE  *AtaDevice
+  )
+{
+  UINTN   Index;
+  CHAR8   *Source;
+  CHAR16  *Destination;
+
+  Source = AtaDevice->IdentifyData->ModelName;
+  Destination = AtaDevice->ModelName;
+
+  //
+  // Swap the byte order in the original module name.
+  //
+  for (Index = 0; Index < MAX_MODEL_NAME_LEN; Index += 2) {
+    Destination[Index]      = Source[Index + 1];
+    Destination[Index + 1]  = Source[Index];
+  }
+  AtaDevice->ModelName[MAX_MODEL_NAME_LEN] = L'\0';
+}
+
+
+/**
+  Gets ATA device Capacity according to ATA 6.
+
+  This function returns the capacity of the ATA device if it follows
+  ATA 6 to support 48 bit addressing.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+  @return The capacity of the ATA device or 0 if the device does not support
+          48-bit addressing defined in ATA 6.
+
+**/
+EFI_LBA
+GetAtapi6Capacity (
+  IN ATA_DEVICE                 *AtaDevice
+  )
+{
+  EFI_LBA                       Capacity;
+  EFI_LBA                       TmpLba;
+  UINTN                         Index;
+  ATA_IDENTIFY_DATA             *IdentifyData;
+
+  IdentifyData = AtaDevice->IdentifyData;
+  if ((IdentifyData->command_set_supported_83 & BIT10) == 0) {
+    //
+    // The device doesn't support 48 bit addressing
+    //
+    return 0;
+  }
+
+  //
+  // 48 bit address feature set is supported, get maximum capacity
+  //
+  Capacity = 0;
+  for (Index = 0; Index < 4; Index++) {
+    //
+    // Lower byte goes first: word[100] is the lowest word, word[103] is highest
+    //
+    TmpLba = IdentifyData->maximum_lba_for_48bit_addressing[Index];
+    Capacity |= LShiftU64 (TmpLba, 16 * Index);
+  }
+
+  return Capacity;
+}
+
+
+/**
+  Identifies ATA device via the Identify data.
+
+  This function identifies the ATA device and initializes the Media information in
+  Block IO protocol interface.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+  @retval EFI_UNSUPPORTED   The device is not a valid ATA device (hard disk).
+  @retval EFI_SUCCESS       The device is successfully identified and Media information
+                            is correctly initialized.
+
+**/
+EFI_STATUS
+IdentifyAtaDevice (
+  IN OUT ATA_DEVICE                 *AtaDevice
+  )
+{
+  ATA_IDENTIFY_DATA                 *IdentifyData;
+  EFI_BLOCK_IO_MEDIA                *BlockMedia;
+  EFI_LBA                           Capacity;
+  UINT16                            PhyLogicSectorSupport;
+  UINT16                            UdmaMode;
+
+  IdentifyData = AtaDevice->IdentifyData;
+
+  if ((IdentifyData->config & BIT15) != 0) {
+    //
+    // This is not an hard disk
+    //
+    return EFI_UNSUPPORTED;
+  }
+
+  DEBUG ((EFI_D_INFO, "AtaBus - Identify Device: Port %x PortMultiplierPort %x\n", AtaDevice->Port, AtaDevice->PortMultiplierPort));
+
+  //
+  // Check whether the WORD 88 (supported UltraDMA by drive) is valid
+  //
+  if ((IdentifyData->field_validity & BIT2) != 0) {
+    UdmaMode = IdentifyData->ultra_dma_mode;
+    if ((UdmaMode & (BIT0 | BIT1 | BIT2 | BIT3 | BIT4 | BIT5 | BIT6)) != 0) {
+      //
+      // If BIT0~BIT6 is selected, then UDMA is supported
+      //
+      AtaDevice->UdmaValid = TRUE;
+    }
+  }
+
+  Capacity = GetAtapi6Capacity (AtaDevice);
+  if (Capacity > MAX_28BIT_ADDRESSING_CAPACITY) {
+    //
+    // Capacity exceeds 120GB. 48-bit addressing is really needed
+    //
+    AtaDevice->Lba48Bit = TRUE;
+  } else {
+    //
+    // This is a hard disk <= 120GB capacity, treat it as normal hard disk
+    //
+    Capacity = ((UINT32)IdentifyData->user_addressable_sectors_hi << 16) | IdentifyData->user_addressable_sectors_lo;
+    AtaDevice->Lba48Bit = FALSE;
+  }
+
+  //
+  // Block Media Information:
+  //
+  BlockMedia = &AtaDevice->BlockMedia;
+  BlockMedia->LastBlock = Capacity - 1;
+  BlockMedia->IoAlign = AtaDevice->AtaBusDriverData->AtaPassThru->Mode->IoAlign;
+  //
+  // Check whether Long Physical Sector Feature is supported
+  //
+  PhyLogicSectorSupport = IdentifyData->phy_logic_sector_support;
+  if ((PhyLogicSectorSupport & (BIT14 | BIT15)) == BIT14) {
+    //
+    // Check whether one physical block contains multiple physical blocks
+    //
+    if ((PhyLogicSectorSupport & BIT13) != 0) {
+      BlockMedia->LogicalBlocksPerPhysicalBlock = (UINT32) (1 << (PhyLogicSectorSupport & 0x000f));
+      //
+      // Check lowest alignment of logical blocks within physical block
+      //
+      if ((IdentifyData->alignment_logic_in_phy_blocks & (BIT14 | BIT15)) == BIT14) {
+        BlockMedia->LowestAlignedLba = (EFI_LBA) ((BlockMedia->LogicalBlocksPerPhysicalBlock - ((UINT32)IdentifyData->alignment_logic_in_phy_blocks & 0x3fff)) %
+          BlockMedia->LogicalBlocksPerPhysicalBlock);
+      }
+    }
+    //
+    // Check logical block size
+    //
+    if ((PhyLogicSectorSupport & BIT12) != 0) {
+      BlockMedia->BlockSize = (UINT32) (((IdentifyData->logic_sector_size_hi << 16) | IdentifyData->logic_sector_size_lo) * sizeof (UINT16));
+    }
+    AtaDevice->BlockIo.Revision = EFI_BLOCK_IO_PROTOCOL_REVISION2;
+  }
+  //
+  // Get ATA model name from identify data structure.
+  //
+  PrintAtaModelName (AtaDevice);
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Discovers whether it is a valid ATA device.
+
+  This function issues ATA_CMD_IDENTIFY_DRIVE command to the ATA device to identify it.
+  If the command is executed successfully, it then identifies it and initializes
+  the Media information in Block IO protocol interface.
+
+  @param  AtaDevice         The ATA child device involved for the operation.
+
+  @retval EFI_SUCCESS       The device is successfully identified and Media information
+                            is correctly initialized.
+  @return others            Some error occurs when discovering the ATA device.
+
+**/
+EFI_STATUS
+DiscoverAtaDevice (
+  IN OUT ATA_DEVICE                 *AtaDevice
+  )
+{
+  EFI_STATUS                        Status;
+  EFI_ATA_COMMAND_BLOCK             *Acb;
+  EFI_ATA_PASS_THRU_COMMAND_PACKET  *Packet;
+  UINTN                             Retry;
+
+  //
+  // Prepare for ATA command block.
+  //
+  Acb = ZeroMem (&AtaDevice->Acb, sizeof (EFI_ATA_COMMAND_BLOCK));
+  Acb->AtaCommand = ATA_CMD_IDENTIFY_DRIVE;
+  Acb->AtaDeviceHead = (UINT8) (BIT7 | BIT6 | BIT5 | (AtaDevice->PortMultiplierPort == 0xFFFF ? 0 : (AtaDevice->PortMultiplierPort << 4)));
+
+  //
+  // Prepare for ATA pass through packet.
+  //
+  Packet = ZeroMem (&AtaDevice->Packet, sizeof (EFI_ATA_PASS_THRU_COMMAND_PACKET));
+  Packet->InDataBuffer = AtaDevice->IdentifyData;
+  Packet->InTransferLength = sizeof (ATA_IDENTIFY_DATA);
+  Packet->Protocol = EFI_ATA_PASS_THRU_PROTOCOL_PIO_DATA_IN;
+  Packet->Length   = EFI_ATA_PASS_THRU_LENGTH_BYTES | EFI_ATA_PASS_THRU_LENGTH_SECTOR_COUNT;
+  Packet->Timeout  = ATA_TIMEOUT;
+
+  Retry = MAX_RETRY_TIMES;
+  do {
+    Status = AtaDevicePassThru (AtaDevice, NULL, NULL);
+    if (!EFI_ERROR (Status)) {
+      //
+      // The command is issued successfully
+      //
+      Status = IdentifyAtaDevice (AtaDevice);
+      return Status;
+    }
+  } while (Retry-- > 0);
+
+  return Status;
+}
+
+/**
+  Transfer data from ATA device.
+
+  This function performs one ATA pass through transaction to transfer data from/to
+  ATA device. It chooses the appropriate ATA command and protocol to invoke PassThru
+  interface of ATA pass through.
+
+  @param[in, out]  AtaDevice       The ATA child device involved for the operation.
+  @param[in, out]  TaskPacket      Pointer to a Pass Thru Command Packet. Optional,
+                                   if it is NULL, blocking mode, and use the packet
+                                   in AtaDevice. If it is not NULL, non blocking mode,
+                                   and pass down this Packet.
+  @param[in, out]  Buffer          The pointer to the current transaction buffer.
+  @param[in]       StartLba        The starting logical block address to be accessed.
+  @param[in]       TransferLength  The block number or sector count of the transfer.
+  @param[in]       IsWrite         Indicates whether it is a write operation.
+  @param[in]       Event           If Event is NULL, then blocking I/O is performed.
+                                   If Event is not NULL and non-blocking I/O is
+                                   supported,then non-blocking I/O is performed,
+                                   and Event will be signaled when the write
+                                   request is completed.
+
+  @retval EFI_SUCCESS       The data transfer is complete successfully.
+  @return others            Some error occurs when transferring data.
+
+**/
+EFI_STATUS
+TransferAtaDevice (
+  IN OUT ATA_DEVICE                       *AtaDevice,
+  IN OUT EFI_ATA_PASS_THRU_COMMAND_PACKET *TaskPacket, OPTIONAL
+  IN OUT VOID                             *Buffer,
+  IN EFI_LBA                              StartLba,
+  IN UINT32                               TransferLength,
+  IN BOOLEAN                              IsWrite,
+  IN EFI_EVENT                            Event OPTIONAL
+  )
+{
+  EFI_ATA_COMMAND_BLOCK             *Acb;
+  EFI_ATA_PASS_THRU_COMMAND_PACKET  *Packet;
+
+  //
+  // Ensure AtaDevice->UdmaValid, AtaDevice->Lba48Bit and IsWrite are valid boolean values
+  //
+  ASSERT ((UINTN) AtaDevice->UdmaValid < 2);
+  ASSERT ((UINTN) AtaDevice->Lba48Bit < 2);
+  ASSERT ((UINTN) IsWrite < 2);
+  //
+  // Prepare for ATA command block.
+  //
+  Acb = ZeroMem (&AtaDevice->Acb, sizeof (EFI_ATA_COMMAND_BLOCK));
+  Acb->AtaCommand = mAtaCommands[AtaDevice->UdmaValid][AtaDevice->Lba48Bit][IsWrite];
+  Acb->AtaSectorNumber = (UINT8) StartLba;
+  Acb->AtaCylinderLow = (UINT8) RShiftU64 (StartLba, 8);
+  Acb->AtaCylinderHigh = (UINT8) RShiftU64 (StartLba, 16);
+  Acb->AtaDeviceHead = (UINT8) (BIT7 | BIT6 | BIT5 | (AtaDevice->PortMultiplierPort == 0xFFFF ? 0 : (AtaDevice->PortMultiplierPort << 4)));
+  Acb->AtaSectorCount = (UINT8) TransferLength;
+  if (AtaDevice->Lba48Bit) {
+    Acb->AtaSectorNumberExp = (UINT8) RShiftU64 (StartLba, 24);
+    Acb->AtaCylinderLowExp = (UINT8) RShiftU64 (StartLba, 32);
+    Acb->AtaCylinderHighExp = (UINT8) RShiftU64 (StartLba, 40);
+    Acb->AtaSectorCountExp = (UINT8) (TransferLength >> 8);
+  } else {
+    Acb->AtaDeviceHead = (UINT8) (Acb->AtaDeviceHead | RShiftU64 (StartLba, 24));
+  }
+
+  //
+  // Prepare for ATA pass through packet.
+  //
+  if (TaskPacket != NULL) {
+    Packet = ZeroMem (TaskPacket, sizeof (EFI_ATA_PASS_THRU_COMMAND_PACKET));
+  } else {
+    Packet = ZeroMem (&AtaDevice->Packet, sizeof (EFI_ATA_PASS_THRU_COMMAND_PACKET));
+  }
+
+  if (IsWrite) {
+    Packet->OutDataBuffer = Buffer;
+    Packet->OutTransferLength = TransferLength;
+  } else {
+    Packet->InDataBuffer = Buffer;
+    Packet->InTransferLength = TransferLength;
+  }
+
+  Packet->Protocol = mAtaPassThruCmdProtocols[AtaDevice->UdmaValid][IsWrite];
+  Packet->Length = EFI_ATA_PASS_THRU_LENGTH_SECTOR_COUNT;
+  //
+  // |------------------------|-----------------|------------------------|-----------------|
+  // | ATA PIO Transfer Mode  |  Transfer Rate  | ATA DMA Transfer Mode  |  Transfer Rate  |
+  // |------------------------|-----------------|------------------------|-----------------|
+  // |       PIO Mode 0       |  3.3Mbytes/sec  | Single-word DMA Mode 0 |  2.1Mbytes/sec  |
+  // |------------------------|-----------------|------------------------|-----------------|
+  // |       PIO Mode 1       |  5.2Mbytes/sec  | Single-word DMA Mode 1 |  4.2Mbytes/sec  |
+  // |------------------------|-----------------|------------------------|-----------------|
+  // |       PIO Mode 2       |  8.3Mbytes/sec  | Single-word DMA Mode 2 |  8.4Mbytes/sec  |
+  // |------------------------|-----------------|------------------------|-----------------|
+  // |       PIO Mode 3       | 11.1Mbytes/sec  | Multi-word DMA Mode 0  |  4.2Mbytes/sec  |
+  // |------------------------|-----------------|------------------------|-----------------|
+  // |       PIO Mode 4       | 16.6Mbytes/sec  | Multi-word DMA Mode 1  | 13.3Mbytes/sec  |
+  // |------------------------|-----------------|------------------------|-----------------|
+  //
+  // As AtaBus is used to manage ATA devices, we have to use the lowest transfer rate to
+  // calculate the possible maximum timeout value for each read/write operation.
+  // The timeout value is rounded up to nearest integer and here an additional 30s is added
+  // to follow ATA spec in which it mentioned that the device may take up to 30s to respond
+  // commands in the Standby/Idle mode.
+  //
+  if (AtaDevice->UdmaValid) {
+    //
+    // Calculate the maximum timeout value for DMA read/write operation.
+    //
+    Packet->Timeout  = EFI_TIMER_PERIOD_SECONDS (DivU64x32 (MultU64x32 (TransferLength, AtaDevice->BlockMedia.BlockSize), 2100000) + 31);
+  } else {
+    //
+    // Calculate the maximum timeout value for PIO read/write operation
+    //
+    Packet->Timeout  = EFI_TIMER_PERIOD_SECONDS (DivU64x32 (MultU64x32 (TransferLength, AtaDevice->BlockMedia.BlockSize), 3300000) + 31);
+  }
+
+  return AtaDevicePassThru (AtaDevice, TaskPacket, Event);
+}
+
+/**
+  Free SubTask.
+
+  @param[in, out]  Task      Pointer to task to be freed.
+
+**/
+VOID
+EFIAPI
+FreeAtaSubTask (
+  IN OUT ATA_BUS_ASYN_SUB_TASK  *Task
+  )
+{
+  if (Task->Packet.Asb != NULL) {
+    FreeAlignedBuffer (Task->Packet.Asb, sizeof (EFI_ATA_STATUS_BLOCK));
+  }
+  if (Task->Packet.Acb != NULL) {
+    FreePool (Task->Packet.Acb);
+  }
+
+  FreePool (Task);
+}
+
+/**
+  Terminate any in-flight non-blocking I/O requests by signaling an EFI_ABORTED
+  in the TransactionStatus member of the EFI_BLOCK_IO2_TOKEN for the non-blocking
+  I/O. After that it is safe to free any Token or Buffer data structures that
+  were allocated to initiate the non-blockingI/O requests that were in-flight for
+  this device.
+
+  @param[in]  AtaDevice     The ATA child device involved for the operation.
+
+**/
+VOID
+EFIAPI
+AtaTerminateNonBlockingTask (
+  IN ATA_DEVICE               *AtaDevice
+  )
+{
+  BOOLEAN               SubTaskEmpty;
+  EFI_TPL               OldTpl;
+  ATA_BUS_ASYN_TASK     *AtaTask;
+  LIST_ENTRY            *Entry;
+  LIST_ENTRY            *List;
+
+  OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+  //
+  // Abort all executing tasks from now.
+  //
+  AtaDevice->Abort = TRUE;
+
+  List = &AtaDevice->AtaTaskList;
+  for (Entry = GetFirstNode (List); !IsNull (List, Entry);) {
+    AtaTask  = ATA_ASYN_TASK_FROM_ENTRY (Entry);
+    AtaTask->Token->TransactionStatus = EFI_ABORTED;
+    gBS->SignalEvent (AtaTask->Token->Event);
+
+    Entry = RemoveEntryList (Entry);
+    FreePool (AtaTask);
+  }
+  gBS->RestoreTPL (OldTpl);
+
+  do {
+    OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+    //
+    // Wait for executing subtasks done.
+    //
+    SubTaskEmpty = IsListEmpty (&AtaDevice->AtaSubTaskList);
+    gBS->RestoreTPL (OldTpl);
+  } while (!SubTaskEmpty);
+
+  //
+  // Aborting operation has been done. From now on, don't need to abort normal operation.
+  //
+  OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+  AtaDevice->Abort = FALSE;
+  gBS->RestoreTPL (OldTpl);
+}
+
+/**
+  Call back function when the event is signaled.
+
+  @param[in]  Event     The Event this notify function registered to.
+  @param[in]  Context   Pointer to the context data registered to the
+                        Event.
+
+**/
+VOID
+EFIAPI
+AtaNonBlockingCallBack (
+  IN EFI_EVENT                Event,
+  IN VOID                     *Context
+  )
+{
+  ATA_BUS_ASYN_SUB_TASK *Task;
+  ATA_BUS_ASYN_TASK     *AtaTask;
+  ATA_DEVICE            *AtaDevice;
+  LIST_ENTRY            *Entry;
+  EFI_STATUS            Status;
+
+  Task = (ATA_BUS_ASYN_SUB_TASK *) Context;
+  gBS->CloseEvent (Event);
+
+  AtaDevice = Task->AtaDevice;
+
+  //
+  // Check the command status.
+  // If there is error during the sub task source allocation, the error status
+  // should be returned to the caller directly, so here the Task->Token may already
+  // be deleted by the caller and no need to update the status.
+  //
+  if ((!(*Task->IsError)) && ((Task->Packet.Asb->AtaStatus & 0x01) == 0x01)) {
+    Task->Token->TransactionStatus = EFI_DEVICE_ERROR;
+  }
+
+  if (AtaDevice->Abort) {
+    Task->Token->TransactionStatus = EFI_ABORTED;
+  }
+
+  DEBUG ((
+    EFI_D_BLKIO,
+    "NON-BLOCKING EVENT FINISHED!- STATUS = %r\n",
+    Task->Token->TransactionStatus
+    ));
+
+  //
+  // Reduce the SubEventCount, till it comes to zero.
+  //
+  (*Task->UnsignalledEventCount) --;
+  DEBUG ((EFI_D_BLKIO, "UnsignalledEventCount = %d\n", *Task->UnsignalledEventCount));
+
+  //
+  // Remove the SubTask from the Task list.
+  //
+  RemoveEntryList (&Task->TaskEntry);
+  if ((*Task->UnsignalledEventCount) == 0) {
+    //
+    // All Sub tasks are done, then signal the upper layer event.
+    // Except there is error during the sub task source allocation.
+    //
+    if (!(*Task->IsError)) {
+      gBS->SignalEvent (Task->Token->Event);
+      DEBUG ((EFI_D_BLKIO, "Signal the upper layer event!\n"));
+    }
+
+    FreePool (Task->UnsignalledEventCount);
+    FreePool (Task->IsError);
+
+
+    //
+    // Finish all subtasks and move to the next task in AtaTaskList.
+    //
+    if (!IsListEmpty (&AtaDevice->AtaTaskList)) {
+      Entry   = GetFirstNode (&AtaDevice->AtaTaskList);
+      AtaTask = ATA_ASYN_TASK_FROM_ENTRY (Entry);
+      DEBUG ((EFI_D_BLKIO, "Start to embark a new Ata Task\n"));
+      DEBUG ((EFI_D_BLKIO, "AtaTask->NumberOfBlocks = %x; AtaTask->Token=%x\n", AtaTask->NumberOfBlocks, AtaTask->Token));
+      Status = AccessAtaDevice (
+                 AtaTask->AtaDevice,
+                 AtaTask->Buffer,
+                 AtaTask->StartLba,
+                 AtaTask->NumberOfBlocks,
+                 AtaTask->IsWrite,
+                 AtaTask->Token
+                 );
+      if (EFI_ERROR (Status)) {
+        AtaTask->Token->TransactionStatus = Status;
+        gBS->SignalEvent (AtaTask->Token->Event);
+      }
+      RemoveEntryList (Entry);
+      FreePool (AtaTask);
+    }
+  }
+
+  DEBUG ((
+    EFI_D_BLKIO,
+    "PACKET INFO: Write=%s, Length=%x, LowCylinder=%x, HighCylinder=%x, SectionNumber=%x\n",
+    Task->Packet.OutDataBuffer != NULL ? L"YES" : L"NO",
+    Task->Packet.OutDataBuffer != NULL ? Task->Packet.OutTransferLength : Task->Packet.InTransferLength,
+    Task->Packet.Acb->AtaCylinderLow,
+    Task->Packet.Acb->AtaCylinderHigh,
+    Task->Packet.Acb->AtaSectorCount
+    ));
+
+  //
+  // Free the buffer of SubTask.
+  //
+  FreeAtaSubTask (Task);
+}
+
+/**
+  Read or write a number of blocks from ATA device.
+
+  This function performs ATA pass through transactions to read/write data from/to
+  ATA device. It may separate the read/write request into several ATA pass through
+  transactions.
+
+  @param[in, out]  AtaDevice       The ATA child device involved for the operation.
+  @param[in, out]  Buffer          The pointer to the current transaction buffer.
+  @param[in]       StartLba        The starting logical block address to be accessed.
+  @param[in]       NumberOfBlocks  The block number or sector count of the transfer.
+  @param[in]       IsWrite         Indicates whether it is a write operation.
+  @param[in, out]  Token           A pointer to the token associated with the transaction.
+
+  @retval EFI_SUCCESS       The data transfer is complete successfully.
+  @return others            Some error occurs when transferring data.
+
+**/
+EFI_STATUS
+AccessAtaDevice(
+  IN OUT ATA_DEVICE                 *AtaDevice,
+  IN OUT UINT8                      *Buffer,
+  IN EFI_LBA                        StartLba,
+  IN UINTN                          NumberOfBlocks,
+  IN BOOLEAN                        IsWrite,
+  IN OUT EFI_BLOCK_IO2_TOKEN        *Token
+  )
+{
+  EFI_STATUS                        Status;
+  UINTN                             MaxTransferBlockNumber;
+  UINTN                             TransferBlockNumber;
+  UINTN                             BlockSize;
+  ATA_BUS_ASYN_SUB_TASK             *SubTask;
+  UINTN                             *EventCount;
+  UINTN                             TempCount;
+  ATA_BUS_ASYN_TASK                 *AtaTask;
+  EFI_EVENT                         SubEvent;
+  UINTN                             Index;
+  BOOLEAN                           *IsError;
+  EFI_TPL                           OldTpl;
+
+  TempCount  = 0;
+  Status     = EFI_SUCCESS;
+  EventCount = NULL;
+  IsError    = NULL;
+  Index      = 0;
+  SubTask    = NULL;
+  SubEvent   = NULL;
+  AtaTask    = NULL;
+
+  //
+  // Ensure AtaDevice->Lba48Bit is a valid boolean value
+  //
+  ASSERT ((UINTN) AtaDevice->Lba48Bit < 2);
+  MaxTransferBlockNumber = mMaxTransferBlockNumber[AtaDevice->Lba48Bit];
+  BlockSize              = AtaDevice->BlockMedia.BlockSize;
+
+  //
+  // Initial the return status and shared account for Non Blocking.
+  //
+  if ((Token != NULL) && (Token->Event != NULL)) {
+    OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+
+    if (!IsListEmpty (&AtaDevice->AtaSubTaskList)) {
+      AtaTask = AllocateZeroPool (sizeof (ATA_BUS_ASYN_TASK));
+      if (AtaTask == NULL) {
+        gBS->RestoreTPL (OldTpl);
+        return EFI_OUT_OF_RESOURCES;
+      }
+      AtaTask->AtaDevice      = AtaDevice;
+      AtaTask->Buffer         = Buffer;
+      AtaTask->IsWrite        = IsWrite;
+      AtaTask->NumberOfBlocks = NumberOfBlocks;
+      AtaTask->Signature      = ATA_TASK_SIGNATURE;
+      AtaTask->StartLba       = StartLba;
+      AtaTask->Token          = Token;
+
+      InsertTailList (&AtaDevice->AtaTaskList, &AtaTask->TaskEntry);
+      gBS->RestoreTPL (OldTpl);
+      return EFI_SUCCESS;
+    }
+    gBS->RestoreTPL (OldTpl);
+
+    Token->TransactionStatus = EFI_SUCCESS;
+    EventCount = AllocateZeroPool (sizeof (UINTN));
+    if (EventCount == NULL) {
+      return EFI_OUT_OF_RESOURCES;
+    }
+
+    IsError = AllocateZeroPool (sizeof (BOOLEAN));
+    if (IsError == NULL) {
+      FreePool (EventCount);
+      return EFI_OUT_OF_RESOURCES;
+    }
+    DEBUG ((EFI_D_BLKIO, "Allocation IsError Addr=%x\n", IsError));
+    *IsError = FALSE;
+    TempCount   = (NumberOfBlocks + MaxTransferBlockNumber - 1) / MaxTransferBlockNumber;
+    *EventCount = TempCount;
+    DEBUG ((EFI_D_BLKIO, "AccessAtaDevice, NumberOfBlocks=%x\n", NumberOfBlocks));
+    DEBUG ((EFI_D_BLKIO, "AccessAtaDevice, MaxTransferBlockNumber=%x\n", MaxTransferBlockNumber));
+    DEBUG ((EFI_D_BLKIO, "AccessAtaDevice, EventCount=%x\n", TempCount));
+  } else {
+    while (!IsListEmpty (&AtaDevice->AtaTaskList) || !IsListEmpty (&AtaDevice->AtaSubTaskList)) {
+      //
+      // Stall for 100us.
+      //
+      MicroSecondDelay (100);
+    }
+  }
+
+  do {
+    if (NumberOfBlocks > MaxTransferBlockNumber) {
+      TransferBlockNumber = MaxTransferBlockNumber;
+      NumberOfBlocks     -= MaxTransferBlockNumber;
+    } else  {
+      TransferBlockNumber = NumberOfBlocks;
+      NumberOfBlocks      = 0;
+    }
+
+    //
+    // Create sub event for the sub ata task. Non-blocking mode.
+    //
+    if ((Token != NULL) && (Token->Event != NULL)) {
+      SubTask  = NULL;
+      SubEvent = NULL;
+
+      SubTask = AllocateZeroPool (sizeof (ATA_BUS_ASYN_SUB_TASK));
+      if (SubTask == NULL) {
+        Status = EFI_OUT_OF_RESOURCES;
+        goto EXIT;
+      }
+
+      OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+      SubTask->UnsignalledEventCount = EventCount;
+      SubTask->Signature             = ATA_SUB_TASK_SIGNATURE;
+      SubTask->AtaDevice             = AtaDevice;
+      SubTask->Token                 = Token;
+      SubTask->IsError               = IsError;
+      InsertTailList (&AtaDevice->AtaSubTaskList, &SubTask->TaskEntry);
+      gBS->RestoreTPL (OldTpl);
+
+      Status = gBS->CreateEvent (
+                      EVT_NOTIFY_SIGNAL,
+                      TPL_NOTIFY,
+                      AtaNonBlockingCallBack,
+                      SubTask,
+                      &SubEvent
+                      );
+      //
+      // If resource allocation fail, the un-signalled event count should equal to
+      // the original one minus the unassigned subtasks number.
+      //
+      if (EFI_ERROR (Status)) {
+        Status = EFI_OUT_OF_RESOURCES;
+        goto EXIT;
+      }
+
+      Status = TransferAtaDevice (AtaDevice, &SubTask->Packet, Buffer, StartLba, (UINT32) TransferBlockNumber, IsWrite, SubEvent);
+    } else {
+      //
+      // Blocking Mode.
+      //
+      DEBUG ((EFI_D_BLKIO, "Blocking AccessAtaDevice, TransferBlockNumber=%x; StartLba = %x\n", TransferBlockNumber, StartLba));
+      Status = TransferAtaDevice (AtaDevice, NULL, Buffer, StartLba, (UINT32) TransferBlockNumber, IsWrite, NULL);
+    }
+
+    if (EFI_ERROR (Status)) {
+      goto EXIT;
+    }
+
+    Index++;
+    StartLba += TransferBlockNumber;
+    Buffer   += TransferBlockNumber * BlockSize;
+  } while (NumberOfBlocks > 0);
+
+EXIT:
+  if ((Token != NULL) && (Token->Event != NULL)) {
+    //
+    // Release resource at non-blocking mode.
+    //
+    if (EFI_ERROR (Status)) {
+      OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+      Token->TransactionStatus = Status;
+      *EventCount = (*EventCount) - (TempCount - Index);
+      *IsError    = TRUE;
+
+      if (*EventCount == 0) {
+        FreePool (EventCount);
+        FreePool (IsError);
+      }
+
+      if (SubTask != NULL) {
+        RemoveEntryList (&SubTask->TaskEntry);
+        FreeAtaSubTask (SubTask);
+      }
+
+      if (SubEvent != NULL) {
+        gBS->CloseEvent (SubEvent);
+      }
+      gBS->RestoreTPL (OldTpl);
+    }
+  }
+
+  return Status;
+}
+
+/**
+  Trust transfer data from/to ATA device.
+
+  This function performs one ATA pass through transaction to do a trust transfer from/to
+  ATA device. It chooses the appropriate ATA command and protocol to invoke PassThru
+  interface of ATA pass through.
+
+  @param  AtaDevice                    The ATA child device involved for the operation.
+  @param  Buffer                       The pointer to the current transaction buffer.
+  @param  SecurityProtocolId           The value of the "Security Protocol" parameter of
+                                       the security protocol command to be sent.
+  @param  SecurityProtocolSpecificData The value of the "Security Protocol Specific" parameter
+                                       of the security protocol command to be sent.
+  @param  TransferLength               The block number or sector count of the transfer.
+  @param  IsTrustSend                  Indicates whether it is a trust send operation or not.
+  @param  Timeout                      The timeout, in 100ns units, to use for the execution
+                                       of the security protocol command. A Timeout value of 0
+                                       means that this function will wait indefinitely for the
+                                       security protocol command to execute. If Timeout is greater
+                                       than zero, then this function will return EFI_TIMEOUT
+                                       if the time required to execute the receive data command
+                                       is greater than Timeout.
+  @param  TransferLengthOut            A pointer to a buffer to store the size in bytes of the data
+                                       written to the buffer. Ignore it when IsTrustSend is TRUE.
+
+  @retval EFI_SUCCESS       The data transfer is complete successfully.
+  @return others            Some error occurs when transferring data.
+
+**/
+EFI_STATUS
+EFIAPI
+TrustTransferAtaDevice (
+  IN OUT ATA_DEVICE                 *AtaDevice,
+  IN OUT VOID                       *Buffer,
+  IN UINT8                          SecurityProtocolId,
+  IN UINT16                         SecurityProtocolSpecificData,
+  IN UINTN                          TransferLength,
+  IN BOOLEAN                        IsTrustSend,
+  IN UINT64                         Timeout,
+  OUT UINTN                         *TransferLengthOut
+  )
+{
+  EFI_ATA_COMMAND_BLOCK             *Acb;
+  EFI_ATA_PASS_THRU_COMMAND_PACKET  *Packet;
+  EFI_STATUS                        Status;
+  VOID                              *NewBuffer;
+  EFI_ATA_PASS_THRU_PROTOCOL        *AtaPassThru;
+
+  //
+  // Ensure AtaDevice->UdmaValid and IsTrustSend are valid boolean values
+  //
+  ASSERT ((UINTN) AtaDevice->UdmaValid < 2);
+  ASSERT ((UINTN) IsTrustSend < 2);
+  //
+  // Prepare for ATA command block.
+  //
+  Acb = ZeroMem (&AtaDevice->Acb, sizeof (EFI_ATA_COMMAND_BLOCK));
+  if (TransferLength == 0) {
+    Acb->AtaCommand    = ATA_CMD_TRUST_NON_DATA;
+  } else {
+    Acb->AtaCommand    = mAtaTrustCommands[AtaDevice->UdmaValid][IsTrustSend];
+  }
+  Acb->AtaFeatures      = SecurityProtocolId;
+  Acb->AtaSectorCount   = (UINT8) (TransferLength / 512);
+  Acb->AtaSectorNumber  = (UINT8) ((TransferLength / 512) >> 8);
+  //
+  // NOTE: ATA Spec has no explicitly definition for Security Protocol Specific layout.
+  // Here use big endian for Cylinder register.
+  //
+  Acb->AtaCylinderHigh  = (UINT8) SecurityProtocolSpecificData;
+  Acb->AtaCylinderLow   = (UINT8) (SecurityProtocolSpecificData >> 8);
+  Acb->AtaDeviceHead = (UINT8) (BIT7 | BIT6 | BIT5 | (AtaDevice->PortMultiplierPort == 0xFFFF ? 0 : (AtaDevice->PortMultiplierPort << 4)));
+
+  //
+  // Prepare for ATA pass through packet.
+  //
+  Packet = ZeroMem (&AtaDevice->Packet, sizeof (EFI_ATA_PASS_THRU_COMMAND_PACKET));
+  if (TransferLength == 0) {
+    Packet->InTransferLength  = 0;
+    Packet->OutTransferLength = 0;
+    Packet->Protocol = EFI_ATA_PASS_THRU_PROTOCOL_ATA_NON_DATA;
+  } else if (IsTrustSend) {
+    //
+    // Check the alignment of the incoming buffer prior to invoking underlying ATA PassThru
+    //
+    AtaPassThru = AtaDevice->AtaBusDriverData->AtaPassThru;
+    if ((AtaPassThru->Mode->IoAlign > 1) && !IS_ALIGNED (Buffer, AtaPassThru->Mode->IoAlign)) {
+      NewBuffer = AllocateAlignedBuffer (AtaDevice, TransferLength);
+      if (NewBuffer == NULL) {
+        return EFI_OUT_OF_RESOURCES;
+      }
+
+      CopyMem (NewBuffer, Buffer, TransferLength);
+      FreePool (Buffer);
+      Buffer = NewBuffer;
+    }
+    Packet->OutDataBuffer = Buffer;
+    Packet->OutTransferLength = (UINT32) TransferLength;
+    Packet->Protocol = mAtaPassThruCmdProtocols[AtaDevice->UdmaValid][IsTrustSend];
+  } else {
+    Packet->InDataBuffer = Buffer;
+    Packet->InTransferLength = (UINT32) TransferLength;
+    Packet->Protocol = mAtaPassThruCmdProtocols[AtaDevice->UdmaValid][IsTrustSend];
+  }
+  Packet->Length   = EFI_ATA_PASS_THRU_LENGTH_BYTES;
+  Packet->Timeout  = Timeout;
+
+  Status = AtaDevicePassThru (AtaDevice, NULL, NULL);
+  if (TransferLengthOut != NULL) {
+    if (! IsTrustSend) {
+      *TransferLengthOut = Packet->InTransferLength;
+    }
+  }
+  return Status;
+}
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/ComponentName.c b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/ComponentName.c
new file mode 100644
index 00000000..22168f0a
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Bus/Ata/AtaBusDxe/ComponentName.c
@@ -0,0 +1,232 @@
+/** @file
+  UEFI Component Name(2) protocol implementation for ConPlatform driver.
+
+  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "AtaBus.h"
+
+//
+// Driver name table
+//
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mAtaBusDriverNameTable[] = {
+  { "eng;en", L"ATA Bus Driver" },
+  { NULL , NULL }
+};
+
+//
+// Controller name table
+//
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mAtaBusControllerNameTable[] = {
+  { "eng;en", L"ATA Controller" },
+  { NULL , NULL }
+};
+
+
+//
+// EFI Component Name Protocol
+//
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME_PROTOCOL  gAtaBusComponentName = {
+  AtaBusComponentNameGetDriverName,
+  AtaBusComponentNameGetControllerName,
+  "eng"
+};
+
+//
+// EFI Component Name 2 Protocol
+//
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME2_PROTOCOL gAtaBusComponentName2 = {
+  (EFI_COMPONENT_NAME2_GET_DRIVER_NAME) AtaBusComponentNameGetDriverName,
+  (EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME) AtaBusComponentNameGetControllerName,
+  "en"
+};
+
+/**
+  Retrieves a Unicode string that is the user readable name of the driver.
+
+  This function retrieves the user readable name of a driver in the form of a
+  Unicode string. If the driver specified by This has a user readable name in
+  the language specified by Language, then a pointer to the driver name is
+  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
+  by This does not support the language specified by Language,
+  then EFI_UNSUPPORTED is returned.
+
+  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+                                EFI_COMPONENT_NAME_PROTOCOL instance.
+
+  @param  Language[in]          A pointer to a Null-terminated ASCII string
+                                array indicating the language. This is the
+                                language of the driver name that the caller is
+                                requesting, and it must match one of the
+                                languages specified in SupportedLanguages. The
+                                number of languages supported by a driver is up
+                                to the driver writer. Language is specified
+                                in RFC 4646 or ISO 639-2 language code format.
+
+  @param  DriverName[out]       A pointer to the Unicode string to return.
+                                This Unicode string is the name of the
+                                driver specified by This in the language
+                                specified by Language.
+
+  @retval EFI_SUCCESS           The Unicode string for the Driver specified by
+                                This and the language specified by Language was
+                                returned in DriverName.
+
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+
+  @retval EFI_INVALID_PARAMETER DriverName is NULL.
+
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support
+                                the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusComponentNameGetDriverName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
+  IN  CHAR8                        *Language,
+  OUT CHAR16                       **DriverName
+  )
+{
+  return LookupUnicodeString2 (
+           Language,
+           This->SupportedLanguages,
+           mAtaBusDriverNameTable,
+           DriverName,
+           (BOOLEAN)(This == &gAtaBusComponentName)
+           );
+}
+
+
+/**
+  Retrieves a Unicode string that is the user readable name of the controller
+  that is being managed by a driver.
+
+  This function retrieves the user readable name of the controller specified by
+  ControllerHandle and ChildHandle in the form of a Unicode string. If the
+  driver specified by This has a user readable name in the language specified by
+  Language, then a pointer to the controller name is returned in ControllerName,
+  and EFI_SUCCESS is returned.  If the driver specified by This is not currently
+  managing the controller specified by ControllerHandle and ChildHandle,
+  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
+  support the language specified by Language, then EFI_UNSUPPORTED is returned.
+
+  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+                                EFI_COMPONENT_NAME_PROTOCOL instance.
+
+  @param  ControllerHandle[in]  The handle of a controller that the driver
+                                specified by This is managing.  This handle
+                                specifies the controller whose name is to be
+                                returned.
+
+  @param  ChildHandle[in]       The handle of the child controller to retrieve
+                                the name of.  This is an optional parameter that
+                                may be NULL.  It will be NULL for device
+                                drivers.  It will also be NULL for a bus drivers
+                                that wish to retrieve the name of the bus
+                                controller.  It will not be NULL for a bus
+                                driver that wishes to retrieve the name of a
+                                child controller.
+
+  @param  Language[in]          A pointer to a Null-terminated ASCII string
+                                array indicating the language.  This is the
+                                language of the driver name that the caller is
+                                requesting, and it must match one of the
+                                languages specified in SupportedLanguages. The
+                                number of languages supported by a driver is up
+                                to the driver writer. Language is specified in
+                                RFC 4646 or ISO 639-2 language code format.
+
+  @param  ControllerName[out]   A pointer to the Unicode string to return.
+                                This Unicode string is the name of the
+                                controller specified by ControllerHandle and
+                                ChildHandle in the language specified by
+                                Language from the point of view of the driver
+                                specified by This.
+
+  @retval EFI_SUCCESS           The Unicode string for the user readable name in
+                                the language specified by Language for the
+                                driver specified by This was returned in
+                                DriverName.
+
+  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
+
+  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
+                                EFI_HANDLE.
+
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+
+  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
+
+  @retval EFI_UNSUPPORTED       The driver specified by This is not currently
+                                managing the controller specified by
+                                ControllerHandle and ChildHandle.
+
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support
+                                the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+AtaBusComponentNameGetControllerName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL                     *This,
+  IN  EFI_HANDLE                                      ControllerHandle,
+  IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,
+  IN  CHAR8                                           *Language,
+  OUT CHAR16                                          **ControllerName
+  )
+{
+  EFI_STATUS                Status;
+  EFI_BLOCK_IO_PROTOCOL     *BlockIo;
+  ATA_DEVICE                *AtaDevice;
+  EFI_UNICODE_STRING_TABLE  *ControllerNameTable;
+
+  //
+  // Make sure this driver is currently managing ControllHandle
+  //
+  Status = EfiTestManagedDevice (
+             ControllerHandle,
+             gAtaBusDriverBinding.DriverBindingHandle,
+             &gEfiAtaPassThruProtocolGuid
+             );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  ControllerNameTable = mAtaBusControllerNameTable;
+  if (ChildHandle != NULL) {
+    Status = EfiTestChildHandle (
+               ControllerHandle,
+               ChildHandle,
+               &gEfiAtaPassThruProtocolGuid
+               );
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+    //
+    // Get the child context
+    //
+    Status = gBS->OpenProtocol (
+                    ChildHandle,
+                    &gEfiBlockIoProtocolGuid,
+                    (VOID **) &BlockIo,
+                    gAtaBusDriverBinding.DriverBindingHandle,
+                    ChildHandle,
+                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                    );
+    if (EFI_ERROR (Status)) {
+      return EFI_UNSUPPORTED;
+    }
+    AtaDevice = ATA_DEVICE_FROM_BLOCK_IO (BlockIo);
+    ControllerNameTable =AtaDevice->ControllerNameTable;
+  }
+  return LookupUnicodeString2 (
+           Language,
+           This->SupportedLanguages,
+           ControllerNameTable,
+           ControllerName,
+           (BOOLEAN)(This == &gAtaBusComponentName)
+           );
+}