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/** @file
This library provides basic platform driver override functions.
Copyright (c) 2007 - 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 _PLAT_DRI_OVER_LIB_H_
#define _PLAT_DRI_OVER_LIB_H_
#include <PiDxe.h>
#include <Protocol/PlatformDriverOverride.h>
#include <Protocol/DevicePath.h>
#include <Protocol/DriverBinding.h>
#include <Library/BaseLib.h>
#include <VariableFormat.h>
/**
Install the Platform Driver Override Protocol, and ensure there is only one Platform Driver Override Protocol
in the system.
@param gPlatformDriverOverride PlatformDriverOverride protocol interface which
needs to be installed
@retval EFI_ALREADY_STARTED There has been a Platform Driver Override
Protocol in the system, cannot install it again.
@retval EFI_SUCCESS The protocol is installed successfully.
**/
EFI_STATUS
EFIAPI
InstallPlatformDriverOverrideProtocol (
EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *gPlatformDriverOverride
);
/**
Free all the mapping database memory resource and initialize the mapping list entry.
@param MappingDataBase Mapping database list entry pointer
@retval EFI_INVALID_PARAMETER mapping database list entry is NULL
@retval EFI_SUCCESS Free success
**/
EFI_STATUS
EFIAPI
FreeMappingDatabase (
IN OUT LIST_ENTRY *MappingDataBase
);
/**
Read the environment variable(s) that contain the override mappings from Controller Device Path to
a set of Driver Device Paths, and create the mapping database in memory with those variable info.
@param MappingDataBase Mapping database list entry pointer
@retval EFI_INVALID_PARAMETER MappingDataBase pointer is null
@retval EFI_NOT_FOUND Cannot find the 'PlatDriOver' NV variable
@retval EFI_VOLUME_CORRUPTED The found NV variable is corrupted
@retval EFI_SUCCESS Create the mapping database in memory successfully
**/
EFI_STATUS
EFIAPI
InitOverridesMapping (
OUT LIST_ENTRY *MappingDataBase
);
/**
Save the memory mapping database into NV environment variable(s).
@param MappingDataBase Mapping database list entry pointer
@retval EFI_INVALID_PARAMETER MappingDataBase pointer is null
@retval EFI_SUCCESS Save memory mapping database successfully
**/
EFI_STATUS
EFIAPI
SaveOverridesMapping (
IN LIST_ENTRY *MappingDataBase
);
/**
Retrieves the image handle of the platform override driver for a controller in the system from the memory mapping database.
@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 output, a pointer to the next driver handle.
Passing in a pointer to NULL, will return the
first driver handle for ControllerHandle.
@param MappingDataBase MappingDataBase - Mapping database list entry
pointer
@param CallerImageHandle The caller driver's image handle, for
UpdateFvFileDevicePath use.
@retval EFI_INVALID_PARAMETER The handle specified by ControllerHandle is not
a valid handle. Or DriverImagePath is not a
device path that was returned on a previous call
to GetDriverPath().
@retval EFI_NOT_FOUND A driver override for ControllerHandle was not
found.
@retval EFI_UNSUPPORTED The operation is not supported.
@retval EFI_SUCCESS The driver override for ControllerHandle was
returned in DriverImagePath.
**/
EFI_STATUS
EFIAPI
GetDriverFromMapping (
IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL * This,
IN EFI_HANDLE ControllerHandle,
IN OUT EFI_HANDLE * DriverImageHandle,
IN LIST_ENTRY * MappingDataBase,
IN EFI_HANDLE CallerImageHandle
);
/**
Deletes all environment variable(s) that contain the override mappings from Controller Device Path to
a set of Driver Device Paths.
@retval EFI_SUCCESS Delete all variable(s) successfully.
**/
EFI_STATUS
EFIAPI
DeleteOverridesVariables (
VOID
);
/**
Check mapping database whether already has the mapping info which
records the input Controller to input DriverImage.
@param ControllerDevicePath The controller device path is to be check.
@param DriverImageDevicePath The driver image device path is to be check.
@param MappingDataBase Mapping database list entry pointer
@param DriverInfoNum the controller's total override driver number
@param DriverImageNO The driver order number for the input DriverImage.
If the DriverImageDevicePath is NULL, DriverImageNO is not set.
@retval EFI_INVALID_PARAMETER ControllerDevicePath or MappingDataBase is NULL.
@retval EFI_NOT_FOUND ControllerDevicePath is not found in MappingDataBase or
DriverImageDevicePath is not found in the found DriverImage Info list.
@retval EFI_SUCCESS The controller's total override driver number and
input DriverImage's order number is correctly return.
**/
EFI_STATUS
EFIAPI
CheckMapping (
IN EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL *DriverImageDevicePath,
IN LIST_ENTRY * MappingDataBase,
OUT UINT32 *DriverInfoNum,
OUT UINT32 *DriverImageNO
);
/**
Insert a driver image as a controller's override driver into the mapping database.
The driver image's order number is indicated by DriverImageNO.
@param ControllerDevicePath The controller device path need to add a
override driver image item
@param DriverImageDevicePath The driver image device path need to be insert
@param MappingDataBase Mapping database list entry pointer
@param DriverImageNO The inserted order number. If this number is taken,
the larger available number will be used.
@retval EFI_INVALID_PARAMETER ControllerDevicePath is NULL, or DriverImageDevicePath is NULL
or MappingDataBase is NULL
@retval EFI_ALREADY_STARTED The input Controller to input DriverImage has been
recorded into the mapping database.
@retval EFI_SUCCESS The Controller and DriverImage are inserted into
the mapping database successfully.
**/
EFI_STATUS
EFIAPI
InsertDriverImage (
IN EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL *DriverImageDevicePath,
IN LIST_ENTRY *MappingDataBase,
IN UINT32 DriverImageNO
);
/**
Delete a controller's override driver from the mapping database.
@param ControllerDevicePath The controller device path will be deleted
when all drivers images on it are removed.
@param DriverImageDevicePath The driver image device path will be delete.
If NULL, all driver image will be delete.
@param MappingDataBase Mapping database list entry pointer
@retval EFI_INVALID_PARAMETER ControllerDevicePath is NULL, or MappingDataBase is NULL
@retval EFI_NOT_FOUND ControllerDevicePath is not found in MappingDataBase or
DriverImageDevicePath is not found in the found DriverImage Info list.
@retval EFI_SUCCESS Delete the specified driver successfully.
**/
EFI_STATUS
EFIAPI
DeleteDriverImage (
IN EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL *DriverImageDevicePath,
IN LIST_ENTRY *MappingDataBase
);
/**
Get the first Binding protocol which has the specific image handle
@param ImageHandle The Image handle
@param BindingHandle The BindingHandle of the found Driver Binding protocol.
If Binding protocol is not found, it is set to NULL.
@return Pointer into the Binding Protocol interface
@retval NULL The paramter is not valid or the binding protocol is not found.
**/
EFI_DRIVER_BINDING_PROTOCOL *
EFIAPI
GetBindingProtocolFromImageHandle (
IN EFI_HANDLE ImageHandle,
OUT EFI_HANDLE *BindingHandle
);
#endif
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