68dbca6c14
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7121 6f19259b-4bc3-4df7-8a09-765794883524
182 lines
8.0 KiB
C
182 lines
8.0 KiB
C
/** @file
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This library provides basic platform driver override functions.
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Copyright (c) 2007 - 2008, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _PLAT_DRI_OVER_LIB_H_
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#define _PLAT_DRI_OVER_LIB_H_
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#include <Protocol/DevicePath.h>
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/**
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Free all the mapping database memory resource and initialize the mapping list entry.
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@param MappingDataBase Mapping database list entry pointer
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@retval EFI_INVALID_PARAMETER mapping database list entry is NULL
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@retval EFI_SUCCESS Free success
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**/
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EFI_STATUS
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EFIAPI
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FreeMappingDatabase (
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IN OUT LIST_ENTRY *MappingDataBase
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);
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/**
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Read the NV environment variable(s) that contain the override mappings from Controller Device Path to
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a set of Driver Device Paths, and create the mapping database in memory to contain these variable info.
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@param MappingDataBase Mapping database list entry pointer
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@retval EFI_INVALID_PARAMETER MappingDataBase pointer is null
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@retval EFI_NOT_FOUND Cannot find the 'PlatDriOver' NV variable
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@retval EFI_VOLUME_CORRUPTED The found NV variable is corrupted
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@retval EFI_SUCCESS Create the mapping database in memory successfully
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**/
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EFI_STATUS
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EFIAPI
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InitOverridesMapping (
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OUT LIST_ENTRY *MappingDataBase
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);
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/**
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Save the memory mapping database into NV environment variable(s).
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If MappingDataBase list is empty, then delete all platform override NV variables.
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@param MappingDataBase Mapping database list entry pointer
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@retval EFI_INVALID_PARAMETER MappingDataBase pointer is null
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@retval EFI_SUCCESS Save memory mapping database successfully
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**/
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EFI_STATUS
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EFIAPI
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SaveOverridesMapping (
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IN LIST_ENTRY *MappingDataBase
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);
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/**
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Retrieves the image handle of the platform override driver for a controller in the system from the memory mapping database.
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@param ControllerHandle The device handle of the controller to check if
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a driver override exists.
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@param DriverImageHandle On output, a pointer to the next driver handle.
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Passing in a pointer to NULL, will return the
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first driver handle for ControllerHandle.
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@param MappingDataBase MappingDataBase - Mapping database list entry
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pointer
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@param CallerImageHandle The caller driver's image handle, for
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UpdateFvFileDevicePath use.
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@retval EFI_INVALID_PARAMETER The handle specified by ControllerHandle is not
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a valid handle. Or DriverImagePath is not a
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device path that was returned on a previous call
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to GetDriverPath().
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@retval EFI_NOT_FOUND A driver override for ControllerHandle was not
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found.
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@retval EFI_UNSUPPORTED The operation is not supported.
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@retval EFI_SUCCESS The driver override for ControllerHandle was
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returned in DriverImagePath.
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**/
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EFI_STATUS
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EFIAPI
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GetDriverFromMapping (
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IN EFI_HANDLE ControllerHandle,
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IN OUT EFI_HANDLE *DriverImageHandle,
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IN LIST_ENTRY *MappingDataBase,
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IN EFI_HANDLE CallerImageHandle
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);
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/**
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Check mapping database whether already has the mapping info which
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records the input Controller to input DriverImage.
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@param ControllerDevicePath The controller device path is to be check.
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@param DriverImageDevicePath The driver image device path is to be check.
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@param MappingDataBase Mapping database list entry pointer
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@param DriverInfoNum the controller's total override driver number
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@param DriverImageNO The driver order number for the input DriverImage.
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If the DriverImageDevicePath is NULL, DriverImageNO is not set.
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@retval EFI_INVALID_PARAMETER ControllerDevicePath or MappingDataBase is NULL.
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@retval EFI_NOT_FOUND ControllerDevicePath is not found in MappingDataBase or
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DriverImageDevicePath is not found in the found DriverImage Info list.
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@retval EFI_SUCCESS The controller's total override driver number and
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input DriverImage's order number is correctly return.
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**/
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EFI_STATUS
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EFIAPI
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CheckMapping (
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IN EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath,
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IN EFI_DEVICE_PATH_PROTOCOL *DriverImageDevicePath OPTIONAL,
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IN LIST_ENTRY *MappingDataBase,
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OUT UINT32 *DriverInfoNum OPTIONAL,
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OUT UINT32 *DriverImageNO OPTIONAL
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);
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/**
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Insert a driver image as a controller's override driver into the mapping database.
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The driver image's order number is indicated by DriverImageNO.
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@param ControllerDevicePath The controller device path need to add a
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override driver image item
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@param DriverImageDevicePath The driver image device path need to be insert
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@param MappingDataBase Mapping database list entry pointer
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@param DriverImageNO The inserted order number. If this number is taken,
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the larger available number will be used.
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@retval EFI_INVALID_PARAMETER ControllerDevicePath is NULL, or DriverImageDevicePath is NULL
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or MappingDataBase is NULL
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@retval EFI_ALREADY_STARTED The input Controller to input DriverImage has been
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recorded into the mapping database.
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@retval EFI_SUCCESS The Controller and DriverImage are inserted into
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the mapping database successfully.
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**/
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EFI_STATUS
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EFIAPI
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InsertDriverImage (
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IN EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath,
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IN EFI_DEVICE_PATH_PROTOCOL *DriverImageDevicePath,
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IN LIST_ENTRY *MappingDataBase,
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IN UINT32 DriverImageNO
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);
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/**
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Delete a controller's override driver from the mapping database.
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@param ControllerDevicePath The controller device path will be deleted
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when all drivers images on it are removed.
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@param DriverImageDevicePath The driver image device path will be delete.
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If NULL, all driver image will be delete.
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@param MappingDataBase Mapping database list entry pointer
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@retval EFI_INVALID_PARAMETER ControllerDevicePath is NULL, or MappingDataBase is NULL
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@retval EFI_NOT_FOUND ControllerDevicePath is not found in MappingDataBase or
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DriverImageDevicePath is not found in the found DriverImage Info list.
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@retval EFI_SUCCESS Delete the specified driver successfully.
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**/
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EFI_STATUS
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EFIAPI
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DeleteDriverImage (
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IN EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath,
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IN EFI_DEVICE_PATH_PROTOCOL *DriverImageDevicePath,
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IN LIST_ENTRY *MappingDataBase
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);
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#endif
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