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/** @file
Bus Specific Driver Override protocol as defined in the UEFI 2.0 specification.
Bus drivers that have a bus specific algorithm for matching drivers to controllers are
required to produce this protocol for each controller. For example, a PCI Bus Driver will produce an
instance of this protocol for every PCI controller that has a PCI option ROM that contains one or
more UEFI drivers. The protocol instance is attached to the handle of the PCI controller.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL_H_
#define _EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL_H_
FILE_LICENCE ( BSD2_PATENT );
///
/// Global ID for the Bus Specific Driver Override Protocol
///
#define EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL_GUID \
{ \
0x3bc1b285, 0x8a15, 0x4a82, {0xaa, 0xbf, 0x4d, 0x7d, 0x13, 0xfb, 0x32, 0x65 } \
}
typedef struct _EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL;
//
// Prototypes for the Bus Specific Driver Override Protocol
//
/**
Uses a bus specific algorithm to retrieve a driver image handle for a controller.
@param This A pointer to the EFI_BUS_SPECIFIC_DRIVER_
OVERRIDE_PROTOCOL instance.
@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. Passing in a NULL, will return the first driver
image handle.
@retval EFI_SUCCESS A bus specific override driver is returned in DriverImageHandle.
@retval EFI_NOT_FOUND The end of the list of override drivers was reached.
A bus specific override driver is not returned in DriverImageHandle.
@retval EFI_INVALID_PARAMETER DriverImageHandle is not a handle that was returned on a
previous call to GetDriver().
**/
typedef
EFI_STATUS
(EFIAPI *EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_GET_DRIVER)(
IN EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *This,
IN OUT EFI_HANDLE *DriverImageHandle
);
///
/// This protocol matches one or more drivers to a controller. This protocol is produced by a bus driver,
/// and it is installed on the child handles of buses that require a bus specific algorithm for matching
/// drivers to controllers.
///
struct _EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL {
EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_GET_DRIVER GetDriver;
};
extern EFI_GUID gEfiBusSpecificDriverOverrideProtocolGuid;
#endif
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