[mirror_edk2.git] / MdeModulePkg / Library / UefiBootManagerLib / BmBootDescription.c

/** @file\r
  Library functions which relate with boot option description.\r
\r
Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>\r
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "InternalBm.h"\r
\r
#define VENDOR_IDENTIFICATION_OFFSET     3\r
#define VENDOR_IDENTIFICATION_LENGTH     8\r
#define PRODUCT_IDENTIFICATION_OFFSET    11\r
#define PRODUCT_IDENTIFICATION_LENGTH    16\r
\r
CONST UINT16 mBmUsbLangId    = 0x0409; // English\r
CHAR16       mBmUefiPrefix[] = L"UEFI ";\r
\r
LIST_ENTRY mPlatformBootDescriptionHandlers = INITIALIZE_LIST_HEAD_VARIABLE (mPlatformBootDescriptionHandlers);\r
\r
/**\r
  For a bootable Device path, return its boot type.\r
\r
  @param  DevicePath        The bootable device Path to check\r
\r
  @retval AcpiFloppyBoot    If given device path contains ACPI_DEVICE_PATH type device path node\r
                            which HID is floppy device.\r
  @retval MessageAtapiBoot  If given device path contains MESSAGING_DEVICE_PATH type device path node\r
                            and its last device path node's subtype is MSG_ATAPI_DP.\r
  @retval MessageSataBoot   If given device path contains MESSAGING_DEVICE_PATH type device path node\r
                            and its last device path node's subtype is MSG_SATA_DP.\r
  @retval MessageScsiBoot   If given device path contains MESSAGING_DEVICE_PATH type device path node\r
                            and its last device path node's subtype is MSG_SCSI_DP.\r
  @retval MessageUsbBoot    If given device path contains MESSAGING_DEVICE_PATH type device path node\r
                            and its last device path node's subtype is MSG_USB_DP.\r
  @retval BmMiscBoot        If tiven device path doesn't match the above condition.\r
\r
**/\r
BM_BOOT_TYPE\r
BmDevicePathType (\r
  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePath\r
  )\r
{\r
  EFI_DEVICE_PATH_PROTOCOL      *Node;\r
  EFI_DEVICE_PATH_PROTOCOL      *NextNode;\r
\r
  ASSERT (DevicePath != NULL);\r
\r
  for (Node = DevicePath; !IsDevicePathEndType (Node); Node = NextDevicePathNode (Node)) {\r
    switch (DevicePathType (Node)) {\r
\r
      case ACPI_DEVICE_PATH:\r
        if (EISA_ID_TO_NUM (((ACPI_HID_DEVICE_PATH *) Node)->HID) == 0x0604) {\r
          return BmAcpiFloppyBoot;\r
        }\r
        break;\r
\r
      case HARDWARE_DEVICE_PATH:\r
        if (DevicePathSubType (Node) == HW_CONTROLLER_DP) {\r
          return BmHardwareDeviceBoot;\r
        }\r
        break;\r
\r
      case MESSAGING_DEVICE_PATH:\r
        //\r
        // Skip LUN device node\r
        //\r
        NextNode = Node;\r
        do {\r
          NextNode = NextDevicePathNode (NextNode);\r
        } while (\r
            (DevicePathType (NextNode) == MESSAGING_DEVICE_PATH) &&\r
            (DevicePathSubType(NextNode) == MSG_DEVICE_LOGICAL_UNIT_DP)\r
            );\r
\r
        //\r
        // If the device path not only point to driver device, it is not a messaging device path,\r
        //\r
        if (!IsDevicePathEndType (NextNode)) {\r
          continue;\r
        }\r
\r
        switch (DevicePathSubType (Node)) {\r
        case MSG_ATAPI_DP:\r
          return BmMessageAtapiBoot;\r
          break;\r
\r
        case MSG_SATA_DP:\r
          return BmMessageSataBoot;\r
          break;\r
\r
        case MSG_USB_DP:\r
          return BmMessageUsbBoot;\r
          break;\r
\r
        case MSG_SCSI_DP:\r
          return BmMessageScsiBoot;\r
          break;\r
        }\r
    }\r
  }\r
\r
  return BmMiscBoot;\r
}\r
\r
/**\r
  Eliminate the extra spaces in the Str to one space.\r
\r
  @param    Str     Input string info.\r
**/\r
VOID\r
BmEliminateExtraSpaces (\r
  IN CHAR16                    *Str\r
  )\r
{\r
  UINTN                        Index;\r
  UINTN                        ActualIndex;\r
\r
  for (Index = 0, ActualIndex = 0; Str[Index] != L'\0'; Index++) {\r
    if ((Str[Index] != L' ') || ((ActualIndex > 0) && (Str[ActualIndex - 1] != L' '))) {\r
      Str[ActualIndex++] = Str[Index];\r
    }\r
  }\r
  Str[ActualIndex] = L'\0';\r
}\r
\r
/**\r
  Try to get the controller's ATA/ATAPI description.\r
\r
  @param Handle                Controller handle.\r
\r
  @return  The description string.\r
**/\r
CHAR16 *\r
BmGetDescriptionFromDiskInfo (\r
  IN EFI_HANDLE                Handle\r
  )\r
{\r
  UINTN                        Index;\r
  EFI_STATUS                   Status;\r
  EFI_DISK_INFO_PROTOCOL       *DiskInfo;\r
  UINT32                       BufferSize;\r
  EFI_ATAPI_IDENTIFY_DATA      IdentifyData;\r
  EFI_SCSI_INQUIRY_DATA        InquiryData;\r
  CHAR16                       *Description;\r
  UINTN                        Length;\r
  CONST UINTN                  ModelNameLength    = 40;\r
  CONST UINTN                  SerialNumberLength = 20;\r
  CHAR8                        *StrPtr;\r
  UINT8                        Temp;\r
  EFI_DEVICE_PATH_PROTOCOL     *DevicePath;\r
\r
  Description  = NULL;\r
\r
  Status = gBS->HandleProtocol (\r
                  Handle,\r
                  &gEfiDiskInfoProtocolGuid,\r
                  (VOID **) &DiskInfo\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return NULL;\r
  }\r
\r
  if (CompareGuid (&DiskInfo->Interface, &gEfiDiskInfoAhciInterfaceGuid) ||\r
      CompareGuid (&DiskInfo->Interface, &gEfiDiskInfoIdeInterfaceGuid)) {\r
    BufferSize   = sizeof (EFI_ATAPI_IDENTIFY_DATA);\r
    Status = DiskInfo->Identify (\r
                         DiskInfo,\r
                         &IdentifyData,\r
                         &BufferSize\r
                         );\r
    if (!EFI_ERROR (Status)) {\r
      Description = AllocateZeroPool ((ModelNameLength + SerialNumberLength + 2) * sizeof (CHAR16));\r
      ASSERT (Description != NULL);\r
      for (Index = 0; Index + 1 < ModelNameLength; Index += 2) {\r
        Description[Index]     = (CHAR16) IdentifyData.ModelName[Index + 1];\r
        Description[Index + 1] = (CHAR16) IdentifyData.ModelName[Index];\r
      }\r
\r
      Length = Index;\r
      Description[Length++] = L' ';\r
\r
      for (Index = 0; Index + 1 < SerialNumberLength; Index += 2) {\r
        Description[Length + Index]     = (CHAR16) IdentifyData.SerialNo[Index + 1];\r
        Description[Length + Index + 1] = (CHAR16) IdentifyData.SerialNo[Index];\r
      }\r
      Length += Index;\r
      Description[Length++] = L'\0';\r
      ASSERT (Length == ModelNameLength + SerialNumberLength + 2);\r
\r
      BmEliminateExtraSpaces (Description);\r
    }\r
  } else if (CompareGuid (&DiskInfo->Interface, &gEfiDiskInfoScsiInterfaceGuid)) {\r
    BufferSize   = sizeof (EFI_SCSI_INQUIRY_DATA);\r
    Status = DiskInfo->Inquiry (\r
                         DiskInfo,\r
                         &InquiryData,\r
                         &BufferSize\r
                         );\r
    if (!EFI_ERROR (Status)) {\r
      Description = AllocateZeroPool ((VENDOR_IDENTIFICATION_LENGTH + PRODUCT_IDENTIFICATION_LENGTH + 2) * sizeof (CHAR16));\r
      ASSERT (Description != NULL);\r
\r
      //\r
      // Per SCSI spec, EFI_SCSI_INQUIRY_DATA.Reserved_5_95[3 - 10] save the Verdor identification\r
      // EFI_SCSI_INQUIRY_DATA.Reserved_5_95[11 - 26] save the product identification,\r
      // Here combine the vendor identification and product identification to the description.\r
      //\r
      StrPtr = (CHAR8 *) (&InquiryData.Reserved_5_95[VENDOR_IDENTIFICATION_OFFSET]);\r
      Temp = StrPtr[VENDOR_IDENTIFICATION_LENGTH];\r
      StrPtr[VENDOR_IDENTIFICATION_LENGTH] = '\0';\r
      AsciiStrToUnicodeStrS (StrPtr, Description, VENDOR_IDENTIFICATION_LENGTH + 1);\r
      StrPtr[VENDOR_IDENTIFICATION_LENGTH] = Temp;\r
\r
      //\r
      // Add one space at the middle of vendor information and product information.\r
      //\r
      Description[VENDOR_IDENTIFICATION_LENGTH] = L' ';\r
\r
      StrPtr = (CHAR8 *) (&InquiryData.Reserved_5_95[PRODUCT_IDENTIFICATION_OFFSET]);\r
      StrPtr[PRODUCT_IDENTIFICATION_LENGTH] = '\0';\r
      AsciiStrToUnicodeStrS (StrPtr, Description + VENDOR_IDENTIFICATION_LENGTH + 1, PRODUCT_IDENTIFICATION_LENGTH + 1);\r
\r
      BmEliminateExtraSpaces (Description);\r
    }\r
  } else if (CompareGuid (&DiskInfo->Interface, &gEfiDiskInfoSdMmcInterfaceGuid)) {\r
    DevicePath = DevicePathFromHandle (Handle);\r
    if (DevicePath == NULL) {\r
      return NULL;\r
    }\r
\r
    while (!IsDevicePathEnd (DevicePath) && (DevicePathType (DevicePath) != MESSAGING_DEVICE_PATH)) {\r
      DevicePath = NextDevicePathNode (DevicePath);\r
    }\r
    if (IsDevicePathEnd (DevicePath)) {\r
      return NULL;\r
    }\r
\r
    if (DevicePathSubType (DevicePath) == MSG_SD_DP) {\r
      Description = L"SD Device";\r
    } else if (DevicePathSubType (DevicePath) == MSG_EMMC_DP) {\r
      Description = L"eMMC Device";\r
    } else {\r
      return NULL;\r
    }\r
\r
    Description = AllocateCopyPool (StrSize (Description), Description);\r
  }\r
\r
  return Description;\r
}\r
\r
/**\r
  Try to get the controller's USB description.\r
\r
  @param Handle                Controller handle.\r
\r
  @return  The description string.\r
**/\r
CHAR16 *\r
BmGetUsbDescription (\r
  IN EFI_HANDLE                Handle\r
  )\r
{\r
  EFI_STATUS                   Status;\r
  EFI_USB_IO_PROTOCOL          *UsbIo;\r
  CHAR16                       NullChar;\r
  CHAR16                       *Manufacturer;\r
  CHAR16                       *Product;\r
  CHAR16                       *SerialNumber;\r
  CHAR16                       *Description;\r
  EFI_USB_DEVICE_DESCRIPTOR    DevDesc;\r
  UINTN                        DescMaxSize;\r
\r
  Status = gBS->HandleProtocol (\r
                  Handle,\r
                  &gEfiUsbIoProtocolGuid,\r
                  (VOID **) &UsbIo\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return NULL;\r
  }\r
\r
  NullChar = L'\0';\r
\r
  Status = UsbIo->UsbGetDeviceDescriptor (UsbIo, &DevDesc);\r
  if (EFI_ERROR (Status)) {\r
    return NULL;\r
  }\r
\r
  Status = UsbIo->UsbGetStringDescriptor (\r
                    UsbIo,\r
                    mBmUsbLangId,\r
                    DevDesc.StrManufacturer,\r
                    &Manufacturer\r
                    );\r
  if (EFI_ERROR (Status)) {\r
    Manufacturer = &NullChar;\r
  }\r
\r
  Status = UsbIo->UsbGetStringDescriptor (\r
                    UsbIo,\r
                    mBmUsbLangId,\r
                    DevDesc.StrProduct,\r
                    &Product\r
                    );\r
  if (EFI_ERROR (Status)) {\r
    Product = &NullChar;\r
  }\r
\r
  Status = UsbIo->UsbGetStringDescriptor (\r
                    UsbIo,\r
                    mBmUsbLangId,\r
                    DevDesc.StrSerialNumber,\r
                    &SerialNumber\r
                    );\r
  if (EFI_ERROR (Status)) {\r
    SerialNumber = &NullChar;\r
  }\r
\r
  if ((Manufacturer == &NullChar) &&\r
      (Product == &NullChar) &&\r
      (SerialNumber == &NullChar)\r
      ) {\r
    return NULL;\r
  }\r
\r
  DescMaxSize = StrSize (Manufacturer) + StrSize (Product) + StrSize (SerialNumber);\r
  Description = AllocateZeroPool (DescMaxSize);\r
  ASSERT (Description != NULL);\r
  StrCatS (Description, DescMaxSize/sizeof(CHAR16), Manufacturer);\r
  StrCatS (Description, DescMaxSize/sizeof(CHAR16), L" ");\r
\r
  StrCatS (Description, DescMaxSize/sizeof(CHAR16), Product);\r
  StrCatS (Description, DescMaxSize/sizeof(CHAR16), L" ");\r
\r
  StrCatS (Description, DescMaxSize/sizeof(CHAR16), SerialNumber);\r
\r
  if (Manufacturer != &NullChar) {\r
    FreePool (Manufacturer);\r
  }\r
  if (Product != &NullChar) {\r
    FreePool (Product);\r
  }\r
  if (SerialNumber != &NullChar) {\r
    FreePool (SerialNumber);\r
  }\r
\r
  BmEliminateExtraSpaces (Description);\r
\r
  return Description;\r
}\r
\r
/**\r
  Return the description for network boot device.\r
\r
  @param Handle                Controller handle.\r
\r
  @return  The description string.\r
**/\r
CHAR16 *\r
BmGetNetworkDescription (\r
  IN EFI_HANDLE                  Handle\r
  )\r
{\r
  EFI_STATUS                     Status;\r
  EFI_DEVICE_PATH_PROTOCOL       *DevicePath;\r
  MAC_ADDR_DEVICE_PATH           *Mac;\r
  VLAN_DEVICE_PATH               *Vlan;\r
  EFI_DEVICE_PATH_PROTOCOL       *Ip;\r
  EFI_DEVICE_PATH_PROTOCOL       *Uri;\r
  CHAR16                         *Description;\r
  UINTN                          DescriptionSize;\r
\r
  Status = gBS->OpenProtocol (\r
                  Handle,\r
                  &gEfiLoadFileProtocolGuid,\r
                  NULL,\r
                  gImageHandle,\r
                  Handle,\r
                  EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return NULL;\r
  }\r
\r
  Status = gBS->OpenProtocol (\r
                  Handle,\r
                  &gEfiDevicePathProtocolGuid,\r
                  (VOID **) &DevicePath,\r
                  gImageHandle,\r
                  Handle,\r
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
                  );\r
  if (EFI_ERROR (Status) || (DevicePath == NULL)) {\r
    return NULL;\r
  }\r
\r
  //\r
  // The PXE device path is like:\r
  //   ....../Mac(...)[/Vlan(...)][/Wi-Fi(...)]\r
  //   ....../Mac(...)[/Vlan(...)][/Wi-Fi(...)]/IPv4(...)\r
  //   ....../Mac(...)[/Vlan(...)][/Wi-Fi(...)]/IPv6(...)\r
  //\r
  // The HTTP device path is like:\r
  //   ....../Mac(...)[/Vlan(...)][/Wi-Fi(...)]/IPv4(...)[/Dns(...)]/Uri(...)\r
  //   ....../Mac(...)[/Vlan(...)][/Wi-Fi(...)]/IPv6(...)[/Dns(...)]/Uri(...)\r
  //\r
  while (!IsDevicePathEnd (DevicePath) &&\r
         ((DevicePathType (DevicePath) != MESSAGING_DEVICE_PATH) ||\r
          (DevicePathSubType (DevicePath) != MSG_MAC_ADDR_DP))\r
         ) {\r
    DevicePath = NextDevicePathNode (DevicePath);\r
  }\r
\r
  if (IsDevicePathEnd (DevicePath)) {\r
    return NULL;\r
  }\r
\r
  Mac = (MAC_ADDR_DEVICE_PATH *) DevicePath;\r
  DevicePath = NextDevicePathNode (DevicePath);\r
\r
  //\r
  // Locate the optional Vlan node\r
  //\r
  if ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) &&\r
      (DevicePathSubType (DevicePath) == MSG_VLAN_DP)\r
      ) {\r
    Vlan = (VLAN_DEVICE_PATH *) DevicePath;\r
    DevicePath = NextDevicePathNode (DevicePath);\r
  } else {\r
    Vlan = NULL;\r
  }\r
\r
  //\r
  // Skip the optional Wi-Fi node\r
  //\r
  if ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) &&\r
      (DevicePathSubType (DevicePath) == MSG_WIFI_DP)\r
      ) {\r
    DevicePath = NextDevicePathNode (DevicePath);\r
  }\r
\r
  //\r
  // Locate the IP node\r
  //\r
  if ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) &&\r
      ((DevicePathSubType (DevicePath) == MSG_IPv4_DP) ||\r
       (DevicePathSubType (DevicePath) == MSG_IPv6_DP))\r
      ) {\r
    Ip = DevicePath;\r
    DevicePath = NextDevicePathNode (DevicePath);\r
  } else {\r
    Ip = NULL;\r
  }\r
\r
  //\r
  // Skip the optional DNS node\r
  //\r
  if ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) &&\r
      (DevicePathSubType (DevicePath) == MSG_DNS_DP)\r
      ) {\r
    DevicePath = NextDevicePathNode (DevicePath);\r
  }\r
\r
  //\r
  // Locate the URI node\r
  //\r
  if ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) &&\r
      (DevicePathSubType (DevicePath) == MSG_URI_DP)\r
      ) {\r
    Uri = DevicePath;\r
    DevicePath = NextDevicePathNode (DevicePath);\r
  } else {\r
    Uri = NULL;\r
  }\r
\r
  //\r
  // Build description like below:\r
  //   "PXEv6 (MAC:112233445566 VLAN1)"\r
  //   "HTTPv4 (MAC:112233445566)"\r
  //\r
  DescriptionSize = sizeof (L"HTTPv6 (MAC:112233445566 VLAN65535)");\r
  Description     = AllocatePool (DescriptionSize);\r
  ASSERT (Description != NULL);\r
  UnicodeSPrint (\r
    Description, DescriptionSize,\r
    (Vlan == NULL) ?\r
    L"%sv%d (MAC:%02x%02x%02x%02x%02x%02x)" :\r
    L"%sv%d (MAC:%02x%02x%02x%02x%02x%02x VLAN%d)",\r
    (Uri == NULL) ? L"PXE" : L"HTTP",\r
    ((Ip == NULL) || (DevicePathSubType (Ip) == MSG_IPv4_DP)) ? 4 : 6,\r
    Mac->MacAddress.Addr[0], Mac->MacAddress.Addr[1], Mac->MacAddress.Addr[2],\r
    Mac->MacAddress.Addr[3], Mac->MacAddress.Addr[4], Mac->MacAddress.Addr[5],\r
    (Vlan == NULL) ? 0 : Vlan->VlanId\r
    );\r
  return Description;\r
}\r
\r
/**\r
  Return the boot description for LoadFile\r
\r
  @param Handle                Controller handle.\r
\r
  @return  The description string.\r
**/\r
CHAR16 *\r
BmGetLoadFileDescription (\r
  IN EFI_HANDLE                  Handle\r
  )\r
{\r
  EFI_STATUS                            Status;\r
  EFI_DEVICE_PATH_PROTOCOL              *FilePath;\r
  EFI_DEVICE_PATH_PROTOCOL              *DevicePathNode;\r
  CHAR16                                *Description;\r
  EFI_LOAD_FILE_PROTOCOL                *LoadFile;\r
\r
  Status = gBS->HandleProtocol (Handle, &gEfiLoadFileProtocolGuid, (VOID **)&LoadFile);\r
  if (EFI_ERROR (Status)) {\r
    return NULL;\r
  }\r
\r
  //\r
  // Get the file name\r
  //\r
  Description = NULL;\r
  Status = gBS->HandleProtocol (Handle, &gEfiDevicePathProtocolGuid, (VOID **)&FilePath);\r
  if (!EFI_ERROR (Status)) {\r
    DevicePathNode = FilePath;\r
    while (!IsDevicePathEnd (DevicePathNode)) {\r
      if (DevicePathNode->Type == MEDIA_DEVICE_PATH && DevicePathNode->SubType == MEDIA_FILEPATH_DP) {\r
        Description = (CHAR16 *)(DevicePathNode + 1);\r
        break;\r
      }\r
      DevicePathNode = NextDevicePathNode (DevicePathNode);\r
    }\r
  }\r
\r
  if (Description != NULL) {\r
    return AllocateCopyPool (StrSize (Description), Description);\r
  }\r
\r
  return NULL;\r
}\r
\r
/**\r
  Return the boot description for NVME boot device.\r
\r
  @param Handle                Controller handle.\r
\r
  @return  The description string.\r
**/\r
CHAR16 *\r
BmGetNvmeDescription (\r
  IN EFI_HANDLE                      Handle\r
  )\r
{\r
  EFI_STATUS                               Status;\r
  EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL       *NvmePassthru;\r
  EFI_DEV_PATH_PTR                         DevicePath;\r
  EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET CommandPacket;\r
  EFI_NVM_EXPRESS_COMMAND                  Command;\r
  EFI_NVM_EXPRESS_COMPLETION               Completion;\r
  NVME_ADMIN_CONTROLLER_DATA               ControllerData;\r
  CHAR16                                   *Description;\r
  CHAR16                                   *Char;\r
  UINTN                                    Index;\r
\r
  Status = gBS->HandleProtocol (Handle, &gEfiDevicePathProtocolGuid, (VOID **) &DevicePath.DevPath);\r
  if (EFI_ERROR (Status)) {\r
    return NULL;\r
  }\r
\r
  Status = gBS->LocateDevicePath (&gEfiNvmExpressPassThruProtocolGuid, &DevicePath.DevPath, &Handle);\r
  if (EFI_ERROR (Status) ||\r
      (DevicePathType (DevicePath.DevPath) != MESSAGING_DEVICE_PATH) ||\r
      (DevicePathSubType (DevicePath.DevPath) != MSG_NVME_NAMESPACE_DP)) {\r
    //\r
    // Do not return description when the Handle is not a child of NVME controller.\r
    //\r
    return NULL;\r
  }\r
\r
  //\r
  // Send ADMIN_IDENTIFY command to NVME controller to get the model and serial number.\r
  //\r
  Status = gBS->HandleProtocol (Handle, &gEfiNvmExpressPassThruProtocolGuid, (VOID **) &NvmePassthru);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  ZeroMem (&CommandPacket, sizeof(EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET));\r
  ZeroMem (&Command, sizeof(EFI_NVM_EXPRESS_COMMAND));\r
  ZeroMem (&Completion, sizeof(EFI_NVM_EXPRESS_COMPLETION));\r
\r
  Command.Cdw0.Opcode = NVME_ADMIN_IDENTIFY_CMD;\r
  //\r
  // According to Nvm Express 1.1 spec Figure 38, When not used, the field shall be cleared to 0h.\r
  // For the Identify command, the Namespace Identifier is only used for the Namespace data structure.\r
  //\r
  Command.Nsid        = 0;\r
  CommandPacket.NvmeCmd        = &Command;\r
  CommandPacket.NvmeCompletion = &Completion;\r
  CommandPacket.TransferBuffer = &ControllerData;\r
  CommandPacket.TransferLength = sizeof (ControllerData);\r
  CommandPacket.CommandTimeout = EFI_TIMER_PERIOD_SECONDS (5);\r
  CommandPacket.QueueType      = NVME_ADMIN_QUEUE;\r
  //\r
  // Set bit 0 (Cns bit) to 1 to identify a controller\r
  //\r
  Command.Cdw10                = 1;\r
  Command.Flags                = CDW10_VALID;\r
\r
  Status = NvmePassthru->PassThru (\r
                               NvmePassthru,\r
                               0,\r
                               &CommandPacket,\r
                               NULL\r
                               );\r
  if (EFI_ERROR (Status)) {\r
    return NULL;\r
  }\r
\r
  Description = AllocateZeroPool (\r
                  (ARRAY_SIZE (ControllerData.Mn) + 1\r
                   + ARRAY_SIZE (ControllerData.Sn) + 1\r
                   + MAXIMUM_VALUE_CHARACTERS + 1\r
                   ) * sizeof (CHAR16));\r
  if (Description != NULL) {\r
    Char = Description;\r
    for (Index = 0; Index < ARRAY_SIZE (ControllerData.Mn); Index++) {\r
      *(Char++) = (CHAR16) ControllerData.Mn[Index];\r
    }\r
    *(Char++) = L' ';\r
    for (Index = 0; Index < ARRAY_SIZE (ControllerData.Sn); Index++) {\r
      *(Char++) = (CHAR16) ControllerData.Sn[Index];\r
    }\r
    *(Char++) = L' ';\r
    UnicodeValueToStringS (\r
      Char, sizeof (CHAR16) * (MAXIMUM_VALUE_CHARACTERS + 1),\r
      0, DevicePath.NvmeNamespace->NamespaceId, 0\r
      );\r
    BmEliminateExtraSpaces (Description);\r
  }\r
\r
  return Description;\r
}\r
\r
/**\r
  Return the boot description for the controller based on the type.\r
\r
  @param Handle                Controller handle.\r
\r
  @return  The description string.\r
**/\r
CHAR16 *\r
BmGetMiscDescription (\r
  IN EFI_HANDLE                  Handle\r
  )\r
{\r
  EFI_STATUS                      Status;\r
  CHAR16                          *Description;\r
  EFI_BLOCK_IO_PROTOCOL           *BlockIo;\r
  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Fs;\r
\r
  switch (BmDevicePathType (DevicePathFromHandle (Handle))) {\r
  case BmAcpiFloppyBoot:\r
    Description = L"Floppy";\r
    break;\r
\r
  case BmMessageAtapiBoot:\r
  case BmMessageSataBoot:\r
    Status = gBS->HandleProtocol (Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r
    ASSERT_EFI_ERROR (Status);\r
    //\r
    // Assume a removable SATA device should be the DVD/CD device\r
    //\r
    Description = BlockIo->Media->RemovableMedia ? L"DVD/CDROM" : L"Hard Drive";\r
    break;\r
\r
  case BmMessageUsbBoot:\r
    Description = L"USB Device";\r
    break;\r
\r
  case BmMessageScsiBoot:\r
    Description = L"SCSI Device";\r
    break;\r
\r
  case BmHardwareDeviceBoot:\r
    Status = gBS->HandleProtocol (Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r
    if (!EFI_ERROR (Status)) {\r
      Description = BlockIo->Media->RemovableMedia ? L"Removable Disk" : L"Hard Drive";\r
    } else {\r
      Description = L"Misc Device";\r
    }\r
    break;\r
\r
  default:\r
    Status = gBS->HandleProtocol (Handle, &gEfiSimpleFileSystemProtocolGuid, (VOID **) &Fs);\r
    if (!EFI_ERROR (Status)) {\r
      Description = L"Non-Block Boot Device";\r
    } else {\r
      Description = L"Misc Device";\r
    }\r
    break;\r
  }\r
\r
  return AllocateCopyPool (StrSize (Description), Description);\r
}\r
\r
/**\r
  Register the platform provided boot description handler.\r
\r
  @param Handler  The platform provided boot description handler\r
\r
  @retval EFI_SUCCESS          The handler was registered successfully.\r
  @retval EFI_ALREADY_STARTED  The handler was already registered.\r
  @retval EFI_OUT_OF_RESOURCES There is not enough resource to perform the registration.\r
**/\r
EFI_STATUS\r
EFIAPI\r
EfiBootManagerRegisterBootDescriptionHandler (\r
  IN EFI_BOOT_MANAGER_BOOT_DESCRIPTION_HANDLER  Handler\r
  )\r
{\r
  LIST_ENTRY                                    *Link;\r
  BM_BOOT_DESCRIPTION_ENTRY                    *Entry;\r
\r
  for ( Link = GetFirstNode (&mPlatformBootDescriptionHandlers)\r
      ; !IsNull (&mPlatformBootDescriptionHandlers, Link)\r
      ; Link = GetNextNode (&mPlatformBootDescriptionHandlers, Link)\r
      ) {\r
    Entry = CR (Link, BM_BOOT_DESCRIPTION_ENTRY, Link, BM_BOOT_DESCRIPTION_ENTRY_SIGNATURE);\r
    if (Entry->Handler == Handler) {\r
      return EFI_ALREADY_STARTED;\r
    }\r
  }\r
\r
  Entry = AllocatePool (sizeof (BM_BOOT_DESCRIPTION_ENTRY));\r
  if (Entry == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  Entry->Signature = BM_BOOT_DESCRIPTION_ENTRY_SIGNATURE;\r
  Entry->Handler   = Handler;\r
  InsertTailList (&mPlatformBootDescriptionHandlers, &Entry->Link);\r
  return EFI_SUCCESS;\r
}\r
\r
BM_GET_BOOT_DESCRIPTION mBmBootDescriptionHandlers[] = {\r
  BmGetUsbDescription,\r
  BmGetDescriptionFromDiskInfo,\r
  BmGetNetworkDescription,\r
  BmGetLoadFileDescription,\r
  BmGetNvmeDescription,\r
  BmGetMiscDescription\r
};\r
\r
/**\r
  Return the boot description for the controller.\r
\r
  @param Handle                Controller handle.\r
\r
  @return  The description string.\r
**/\r
CHAR16 *\r
BmGetBootDescription (\r
  IN EFI_HANDLE                  Handle\r
  )\r
{\r
  LIST_ENTRY                     *Link;\r
  BM_BOOT_DESCRIPTION_ENTRY      *Entry;\r
  CHAR16                         *Description;\r
  CHAR16                         *DefaultDescription;\r
  CHAR16                         *Temp;\r
  UINTN                          Index;\r
\r
  //\r
  // Firstly get the default boot description\r
  //\r
  DefaultDescription = NULL;\r
  for (Index = 0; Index < ARRAY_SIZE (mBmBootDescriptionHandlers); Index++) {\r
    DefaultDescription = mBmBootDescriptionHandlers[Index] (Handle);\r
    if (DefaultDescription != NULL) {\r
      //\r
      // Avoid description confusion between UEFI & Legacy boot option by adding "UEFI " prefix\r
      // ONLY for core provided boot description handler.\r
      //\r
      Temp = AllocatePool (StrSize (DefaultDescription) + sizeof (mBmUefiPrefix));\r
      ASSERT (Temp != NULL);\r
      StrCpyS (Temp, (StrSize (DefaultDescription) + sizeof (mBmUefiPrefix)) / sizeof (CHAR16), mBmUefiPrefix);\r
      StrCatS (Temp, (StrSize (DefaultDescription) + sizeof (mBmUefiPrefix)) / sizeof (CHAR16), DefaultDescription);\r
      FreePool (DefaultDescription);\r
      DefaultDescription = Temp;\r
      break;\r
    }\r
  }\r
  ASSERT (DefaultDescription != NULL);\r
\r
  //\r
  // Secondly query platform for the better boot description\r
  //\r
  for ( Link = GetFirstNode (&mPlatformBootDescriptionHandlers)\r
      ; !IsNull (&mPlatformBootDescriptionHandlers, Link)\r
      ; Link = GetNextNode (&mPlatformBootDescriptionHandlers, Link)\r
      ) {\r
    Entry = CR (Link, BM_BOOT_DESCRIPTION_ENTRY, Link, BM_BOOT_DESCRIPTION_ENTRY_SIGNATURE);\r
    Description = Entry->Handler (Handle, DefaultDescription);\r
    if (Description != NULL) {\r
      FreePool (DefaultDescription);\r
      return Description;\r
    }\r
  }\r
\r
  return DefaultDescription;\r
}\r
\r
/**\r
  Enumerate all boot option descriptions and append " 2"/" 3"/... to make\r
  unique description.\r
\r
  @param BootOptions            Array of boot options.\r
  @param BootOptionCount        Count of boot options.\r
**/\r
VOID\r
BmMakeBootOptionDescriptionUnique (\r
  EFI_BOOT_MANAGER_LOAD_OPTION         *BootOptions,\r
  UINTN                                BootOptionCount\r
  )\r
{\r
  UINTN                                Base;\r
  UINTN                                Index;\r
  UINTN                                DescriptionSize;\r
  UINTN                                MaxSuffixSize;\r
  BOOLEAN                              *Visited;\r
  UINTN                                MatchCount;\r
\r
  if (BootOptionCount == 0) {\r
    return;\r
  }\r
\r
  //\r
  // Calculate the maximum buffer size for the number suffix.\r
  // The initial sizeof (CHAR16) is for the blank space before the number.\r
  //\r
  MaxSuffixSize = sizeof (CHAR16);\r
  for (Index = BootOptionCount; Index != 0; Index = Index / 10) {\r
    MaxSuffixSize += sizeof (CHAR16);\r
  }\r
\r
  Visited = AllocateZeroPool (sizeof (BOOLEAN) * BootOptionCount);\r
  ASSERT (Visited != NULL);\r
\r
  for (Base = 0; Base < BootOptionCount; Base++) {\r
    if (!Visited[Base]) {\r
      MatchCount      = 1;\r
      Visited[Base]   = TRUE;\r
      DescriptionSize = StrSize (BootOptions[Base].Description);\r
      for (Index = Base + 1; Index < BootOptionCount; Index++) {\r
        if (!Visited[Index] && StrCmp (BootOptions[Base].Description, BootOptions[Index].Description) == 0) {\r
          Visited[Index] = TRUE;\r
          MatchCount++;\r
          FreePool (BootOptions[Index].Description);\r
          BootOptions[Index].Description = AllocatePool (DescriptionSize + MaxSuffixSize);\r
          UnicodeSPrint (\r
            BootOptions[Index].Description, DescriptionSize + MaxSuffixSize,\r
            L"%s %d",\r
            BootOptions[Base].Description, MatchCount\r
            );\r
        }\r
      }\r
    }\r
  }\r
\r
  FreePool (Visited);\r
}\r