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/** @file
Platform Driver Override protocol as defined in the UEFI 2.1 specification.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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 NULL.
@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 DriverImagePath On input, a pointer to the previous driver device path returned by
GetDriverPath(). On output, a pointer to the next driver
device path. Passing in a pointer to NULL will return the first
driver device path for ControllerHandle.
@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 NULL.
@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 NULL.
@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
);
///
/// 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.
///
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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