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/** @file
Platform Driver Override protocol as defined in the UEFI 2.1 specification.
Copyright (c) 2006 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL_H__
#define __EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL_H__
///
/// Global ID for the Platform Driver Override Protocol
///
#define EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL_GUID \
{ \
0x6b30c738, 0xa391, 0x11d4, {0x9a, 0x3b, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
}
typedef struct _EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL;
//
// Prototypes for the Platform Driver Override Protocol
//
/**
Retrieves the image handle of the platform override driver for a controller in the system.
@param This A pointer to the EFI_PLATFORM_DRIVER_OVERRIDE_
PROTOCOL instance.
@param ControllerHandle The device handle of the controller to check if a driver override
exists.
@param DriverImageHandle On input, a pointer to the previous driver image handle returned
by GetDriver(). On output, a pointer to the next driver
image handle.
@retval EFI_SUCCESS The driver override for ControllerHandle was returned in
DriverImageHandle.
@retval EFI_NOT_FOUND A driver override for ControllerHandle was not found.
@retval EFI_INVALID_PARAMETER The handle specified by ControllerHandle is not a valid handle.
@retval EFI_INVALID_PARAMETER DriverImageHandle is not a handle that was returned on a
previous call to GetDriver().
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PLATFORM_DRIVER_OVERRIDE_GET_DRIVER)(
IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN OUT EFI_HANDLE *DriverImageHandle
);
/**
Retrieves the device path of the platform override driver for a controller in the system.
@param This A pointer to the EFI_PLATFORM_DRIVER_OVERRIDE_
PROTOCOL instance.
@param ControllerHandle The device handle of the controller to check if a driver override
exists.
@param DriverImageHandle On input, a pointer to the previous driver image handle returned
by GetDriverPath(). On output, a pointer to the next driver
device path.
@retval EFI_SUCCESS The driver override for ControllerHandle was returned in
DriverImageHandle.
@retval EFI_UNSUPPORTED The operation is not supported.
@retval EFI_NOT_FOUND A driver override for ControllerHandle was not found.
@retval EFI_INVALID_PARAMETER The handle specified by ControllerHandle is not a valid handle.
@retval EFI_INVALID_PARAMETER DriverImagePath is not a device path that was returned on a
previous call to GetDriverPath().
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PLATFORM_DRIVER_OVERRIDE_GET_DRIVER_PATH)(
IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN OUT EFI_DEVICE_PATH_PROTOCOL **DriverImagePath
);
/**
Used to associate a driver image handle with a device path that was returned on a prior call to the
GetDriverPath() service. This driver image handle will then be available through the
GetDriver() service.
@param This A pointer to the EFI_PLATFORM_DRIVER_OVERRIDE_
PROTOCOL instance.
@param ControllerHandle The device handle of the controller.
@param DriverImagePath A pointer to the driver device path that was returned in a prior
call to GetDriverPath().
@param DriverImageHandle The driver image handle that was returned by LoadImage()
when the driver specified by DriverImagePath was loaded
into memory.
@retval EFI_SUCCESS The association between DriverImagePath and
DriverImageHandle was established for the controller specified
by ControllerHandle.
@retval EFI_UNSUPPORTED The operation is not supported.
@retval EFI_NOT_FOUND DriverImagePath is not a device path that was returned on a prior
call to GetDriverPath() for the controller specified by
ControllerHandle.
@retval EFI_INVALID_PARAMETER ControllerHandle is not a valid device handle.
@retval EFI_INVALID_PARAMETER DriverImagePath is not a valid device path.
@retval EFI_INVALID_PARAMETER DriverImageHandle is not a valid image handle.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PLATFORM_DRIVER_OVERRIDE_DRIVER_LOADED)(
IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *DriverImagePath,
IN EFI_HANDLE DriverImageHandle
);
//
// Interface structure for the Platform Driver Override Protocol
//
/**
@par Protocol Description:
This protocol matches one or more drivers to a controller. A platform driver
produces this protocol, and it is installed on a separate handle. This protocol
is used by the ConnectController() boot service to select the best driver
for a controller. All of the drivers returned by this protocol have a higher
precedence than drivers found from an EFI Bus Specific Driver Override Protocol
or drivers found from the general UEFI driver Binding search algorithm. If more
than one driver is returned by this protocol, then the drivers are returned in
order from highest precedence to lowest precedence.
@param GetDriver
Retrieves the image handle of a platform override driver for a controller in the system.
@param GetDriverPath
Retrieves the device path of a platform override driver for a controller in the system.
@param DriverLoaded
This function is used after a driver has been loaded using a device path returned
by GetDriverPath(). This function associates a device path to an image handle,
so the image handle can be returned the next time that GetDriver() is called for
the same controller.
**/
struct _EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL {
EFI_PLATFORM_DRIVER_OVERRIDE_GET_DRIVER GetDriver;
EFI_PLATFORM_DRIVER_OVERRIDE_GET_DRIVER_PATH GetDriverPath;
EFI_PLATFORM_DRIVER_OVERRIDE_DRIVER_LOADED DriverLoaded;
};
extern EFI_GUID gEfiPlatformDriverOverrideProtocolGuid;
#endif
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