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/** @file
Functions declaration for Bus Specific Driver Override protocol.
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _EFI_PCI_DRIVER_OVERRRIDE_H_
#define _EFI_PCI_DRIVER_OVERRRIDE_H_
#define DRIVER_OVERRIDE_SIGNATURE SIGNATURE_32 ('d', 'r', 'o', 'v')
//
// PCI driver override driver image list
//
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
EFI_HANDLE DriverImageHandle;
EFI_DEVICE_PATH_PROTOCOL *DriverImagePath;
} PCI_DRIVER_OVERRIDE_LIST;
#define DRIVER_OVERRIDE_FROM_LINK(a) \
CR (a, PCI_DRIVER_OVERRIDE_LIST, Link, DRIVER_OVERRIDE_SIGNATURE)
/**
Initializes a PCI Driver Override Instance.
@param PciIoDevice PCI Device instance.
**/
VOID
InitializePciDriverOverrideInstance (
IN OUT PCI_IO_DEVICE *PciIoDevice
);
/**
Add an overriding driver image.
@param PciIoDevice Instance of PciIo device.
@param DriverImageHandle Image handle of newly added driver image.
@param DriverImagePath Device path of newly added driver image.
@retval EFI_SUCCESS Successfully added driver.
@retval EFI_OUT_OF_RESOURCES No memory resource for new driver instance.
@retval other Some error occurred when locating gEfiLoadedImageProtocolGuid.
**/
EFI_STATUS
AddDriver (
IN PCI_IO_DEVICE *PciIoDevice,
IN EFI_HANDLE DriverImageHandle,
IN EFI_DEVICE_PATH_PROTOCOL *DriverImagePath
);
/**
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().
**/
EFI_STATUS
EFIAPI
GetDriver (
IN EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *This,
IN OUT EFI_HANDLE *DriverImageHandle
);
#endif
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