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audk/MdeModulePkg/Include/Library/PlatDriOverLib.h

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/** @file
Copyright (c) 2007, 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.
Module Name:
PlatDriOverLib.h
Abstract:
**/
#ifndef _PLAT_DRI_OVER_LIB_H_
#define _PLAT_DRI_OVER_LIB_H_
#include <PiDxe.h>
#include <Protocol/PlatformDriverOverride.h>
#include <Protocol/DevicePath.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 Other Returned by InstallProtocolInterface
**/
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.
VariableLayout{
//
// NotEnd indicate whether the variable is the last one, and has no subsequent variable need to load.
// Each variable has MaximumVariableSize limitation, so we maybe need multi variables to store
// large mapping infos.
// The variable(s) name rule is PlatDriOver, PlatDriOver1, PlatDriOver2, ....
//
UINT32 NotEnd;
//
// The entry which contains the mapping that Controller Device Path to a set of Driver Device Paths
// There are often multi mapping entries in a variable.
//
UINT32 SIGNATURE; //EFI_SIGNATURE_32('p','d','o','i')
UINT32 DriverNum;
EFI_DEVICE_PATH_PROTOCOL ControllerDevicePath[];
EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
......
UINT32 SIGNATURE;
UINT32 DriverNum;
EFI_DEVICE_PATH_PROTOCOL ControllerDevicePath[];
EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
......
}
typedef struct _PLATFORM_OVERRIDE_ITEM{
UINTN Signature; //EFI_SIGNATURE_32('p','d','o','i')
LIST_ENTRY Link;
UINT32 DriverInfoNum;
EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath;
LIST_ENTRY DriverInfoList; //DRIVER_IMAGE_INFO List
} PLATFORM_OVERRIDE_ITEM;
typedef struct _DRIVER_IMAGE_INFO{
UINTN Signature; //EFI_SIGNATURE_32('p','d','i','i')
LIST_ENTRY Link;
EFI_HANDLE ImageHandle;
EFI_DEVICE_PATH_PROTOCOL *DriverImagePath;
BOOLEAN UnLoadable;
BOOLEAN UnStartable;
} DRIVER_IMAGE_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
);
EFI_STATUS
EFIAPI
DeleteOverridesVariables (
VOID
);
/**
Check mapping database whether already has the mapping info which
records the input Controller to input DriverImage.
If has, the controller's total override driver number and input DriverImage's order number is return.
@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 DriverInfoNum the controller's total override driver number
@param DriverImageNO The inserted order number
@return EFI_INVALID_PARAMETER
@return EFI_NOT_FOUND
@return EFI_SUCCESS
**/
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
@return EFI_INVALID_PARAMETER
@return EFI_ALREADY_STARTED
@return EFI_SUCCESS
**/
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 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
@return EFI_INVALID_PARAMETER
@return EFI_NOT_FOUND
@return EFI_SUCCESS
**/
EFI_STATUS
EFIAPI
DeleteDriverImage (
IN EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath,
IN EFI_DEVICE_PATH_PROTOCOL *DriverImageDevicePath,
IN LIST_ENTRY *MappingDataBase
);
#endif
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