MdePkg/Include/Protocol/DriverBinding.h

   1 /** @file
   2   UEFI DriverBinding Protocol is defined in UEFI specification.
   3
   4   This protocol is produced by every driver that follows the UEFI Driver Model,
   5   and it is the central component that allows drivers and controllers to be managed.
   6
   7   Copyright (c) 2006 - 2008, Intel Corporation
   8   All rights reserved. This program and the accompanying materials
   9   are licensed and made available under the terms and conditions of the BSD License
  10   which accompanies this distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15
  16 **/
  17
  18 #ifndef __EFI_DRIVER_BINDING_H__
  19 #define __EFI_DRIVER_BINDING_H__
  20
  21 #include <Protocol/DevicePath.h>
  22 ///
  23 /// Global ID for the ControllerHandle Driver Protocol
  24 ///
  25 #define EFI_DRIVER_BINDING_PROTOCOL_GUID \
  26   { \
  27     0x18a031ab, 0xb443, 0x4d1a, {0xa5, 0xc0, 0xc, 0x9, 0x26, 0x1e, 0x9f, 0x71 } \
  28   }
  29
  30 typedef struct _EFI_DRIVER_BINDING_PROTOCOL  EFI_DRIVER_BINDING_PROTOCOL;
  31
  32 /**
  33   Test to see if this driver supports ControllerHandle. This service
  34   is called by the EFI boot service ConnectController(). In
  35   order to make drivers as small as possible, there are a few calling
  36   restrictions for this service. ConnectController() must
  37   follow these calling restrictions. If any other agent wishes to call
  38   Supported() it must also follow these calling restrictions.
  39
  40   @param  This                Protocol instance pointer.
  41   @param  ControllerHandle    Handle of device to test
  42   @param  RemainingDevicePath Optional parameter use to pick a specific child
  43                               device to start.
  44
  45   @retval EFI_SUCCESS         This driver supports this device
  46   @retval EFI_ALREADY_STARTED This driver is already running on this device
  47   @retval other               This driver does not support this device
  48
  49 **/
  50 typedef
  51 EFI_STATUS
  52 (EFIAPI *EFI_DRIVER_BINDING_SUPPORTED)(
  53   IN EFI_DRIVER_BINDING_PROTOCOL            *This,
  54   IN EFI_HANDLE                             ControllerHandle,
  55   IN EFI_DEVICE_PATH_PROTOCOL               *RemainingDevicePath OPTIONAL
  56   );
  57
  58 /**
  59   Start this driver on ControllerHandle. This service is called by the
  60   EFI boot service ConnectController(). In order to make
  61   drivers as small as possible, there are a few calling restrictions for
  62   this service. ConnectController() must follow these
  63   calling restrictions. If any other agent wishes to call Start() it
  64   must also follow these calling restrictions.
  65
  66   @param  This                 Protocol instance pointer.
  67   @param  ControllerHandle     Handle of device to bind driver to
  68   @param  RemainingDevicePath  Optional parameter use to pick a specific child
  69                                device to start.
  70
  71   @retval EFI_SUCCESS          This driver is added to ControllerHandle
  72   @retval EFI_ALREADY_STARTED  This driver is already running on ControllerHandle
  73   @retval other                This driver does not support this device
  74
  75 **/
  76 typedef
  77 EFI_STATUS
  78 (EFIAPI *EFI_DRIVER_BINDING_START)(
  79   IN EFI_DRIVER_BINDING_PROTOCOL            *This,
  80   IN EFI_HANDLE                             ControllerHandle,
  81   IN EFI_DEVICE_PATH_PROTOCOL               *RemainingDevicePath OPTIONAL
  82   );
  83
  84 /**
  85   Stop this driver on ControllerHandle. This service is called by the
  86   EFI boot service DisconnectController(). In order to
  87   make drivers as small as possible, there are a few calling
  88   restrictions for this service. DisconnectController()
  89   must follow these calling restrictions. If any other agent wishes
  90   to call Stop() it must also follow these calling restrictions.
  91
  92   @param  This              Protocol instance pointer.
  93   @param  ControllerHandle  Handle of device to stop driver on
  94   @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
  95                             children is zero stop the entire bus driver.
  96   @param  ChildHandleBuffer List of Child Handles to Stop.
  97
  98   @retval EFI_SUCCESS       This driver is removed ControllerHandle
  99   @retval other             This driver was not removed from this device
 100
 101 **/
 102 typedef
 103 EFI_STATUS
 104 (EFIAPI *EFI_DRIVER_BINDING_STOP)(
 105   IN EFI_DRIVER_BINDING_PROTOCOL            *This,
 106   IN  EFI_HANDLE                            ControllerHandle,
 107   IN  UINTN                                 NumberOfChildren,
 108   IN  EFI_HANDLE                            *ChildHandleBuffer OPTIONAL
 109   );
 110
 111 ///
 112 /// This protocol provides the services required to determine if a driver supports a given controller.
 113 /// If a controller is supported, then it also provides routines to start and stop the controller.
 114 ///
 115 struct _EFI_DRIVER_BINDING_PROTOCOL {
 116   EFI_DRIVER_BINDING_SUPPORTED  Supported;
 117   EFI_DRIVER_BINDING_START      Start;
 118   EFI_DRIVER_BINDING_STOP       Stop;
 119
 120   ///
 121   /// The version number of the UEFI driver that produced the
 122   /// EFI_DRIVER_BINDING_PROTOCOL. This field is used by
 123   /// the EFI boot service ConnectController() to determine
 124   /// the order that driver's Supported() service will be used when
 125   /// a controller needs to be started. EFI Driver Binding Protocol
 126   /// instances with higher Version values will be used before ones
 127   /// with lower Version values. The Version values of 0x0-
 128   /// 0x0f and 0xfffffff0-0xffffffff are reserved for
 129   /// platform/OEM specific drivers. The Version values of 0x10-
 130   /// 0xffffffef are reserved for IHV-developed drivers.
 131   ///
 132   UINT32                        Version;
 133
 134   ///
 135   /// The image handle of the UEFI driver that produced this instance
 136   /// of the EFI_DRIVER_BINDING_PROTOCOL.
 137   ///
 138   EFI_HANDLE                    ImageHandle;
 139
 140   ///
 141   /// The handle on which this instance of the
 142   /// EFI_DRIVER_BINDING_PROTOCOL is installed. In most
 143   /// cases, this is the same handle as ImageHandle. However, for
 144   /// UEFI drivers that produce more than one instance of the
 145   /// EFI_DRIVER_BINDING_PROTOCOL, this value may not be
 146   /// the same as ImageHandle.
 147   ///
 148   EFI_HANDLE                    DriverBindingHandle;
 149 };
 150
 151 extern EFI_GUID gEfiDriverBindingProtocolGuid;
 152
 153 #endif