MdePkg/Include/Protocol/DriverFamilyOverride.h

   1 /** @file
   2   UEFI Driver Family Protocol
   3
   4 Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #ifndef __EFI_DRIVER_FAMILY_OVERRIDE_H__
  10 #define __EFI_DRIVER_FAMILY_OVERRIDE_H__
  11
  12 #define EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL_GUID \
  13   { \
  14     0xb1ee129e, 0xda36, 0x4181, { 0x91, 0xf8, 0x4, 0xa4, 0x92, 0x37, 0x66, 0xa7 } \
  15   }
  16
  17 typedef struct _EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL  EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL;
  18
  19 //
  20 // Prototypes for the Driver Family Override Protocol
  21 //
  22 //
  23 /**
  24   This function returns the version value associated with the driver specified by This.
  25
  26   Retrieves the version of the driver that is used by the EFI Boot Service ConnectController()
  27   to sort the set of Driver Binding Protocols in order from highest priority to lowest priority.
  28   For drivers that support the Driver Family Override Protocol, those drivers are sorted so that
  29   the drivers with higher values returned by GetVersion() are higher priority than drivers that
  30   return lower values from GetVersion().
  31
  32   @param  This                  A pointer to the EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL instance.
  33
  34   @return The version value associated with the driver specified by This.
  35
  36 **/
  37 typedef
  38 UINT32
  39 (EFIAPI *EFI_DRIVER_FAMILY_OVERRIDE_GET_VERSION)(
  40   IN EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL    *This
  41   );
  42
  43 ///
  44 /// When installed, the Driver Family Override Protocol produces a GUID that represents
  45 /// a family of drivers.  Drivers with the same GUID are members of the same family
  46 /// When drivers are connected to controllers, drivers with a higher revision value
  47 /// in the same driver family are connected with a higher priority than drivers
  48 /// with a lower revision value in the same driver family.  The EFI Boot Service
  49 /// Connect Controller uses five rules to build a prioritized list of drivers when
  50 /// a request is made to connect a driver to a controller.  The Driver Family Protocol
  51 /// rule is between the Platform Specific Driver Override Protocol and above the
  52 /// Bus Specific Driver Override Protocol.
  53 ///
  54 struct _EFI_DRIVER_FAMILY_OVERRIDE_PROTOCOL {
  55   EFI_DRIVER_FAMILY_OVERRIDE_GET_VERSION GetVersion;
  56 };
  57
  58 extern EFI_GUID gEfiDriverFamilyOverrideProtocolGuid;
  59
  60 #endif