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1232b21473
2, Add DevicePathLib library class to module's INF that use device path utility macros git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6456 6f19259b-4bc3-4df7-8a09-765794883524
1934 lines
68 KiB
C
1934 lines
68 KiB
C
/** @file
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Implementation of Platform Driver Override Library.
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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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#include "PlatDriOver.h"
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LIST_ENTRY mDevicePathStack = INITIALIZE_LIST_HEAD_VARIABLE (mDevicePathStack);
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/**
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Installs the Platform Driver Override Protocol.
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This function installs the Platform Driver Override Protocol, and ensure there is only one
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Platform Driver Override Protocol in the system.
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@param gPlatformDriverOverride PlatformDriverOverride protocol interface which
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needs to be installed
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@retval EFI_SUCCESS The protocol is installed successfully.
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@retval EFI_ALREADY_STARTED There has been a Platform Driver Override
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Protocol in the system, cannot install it again.
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**/
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EFI_STATUS
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EFIAPI
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InstallPlatformDriverOverrideProtocol (
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EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *gPlatformDriverOverride
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)
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{
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EFI_HANDLE Handle;
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EFI_STATUS Status;
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UINTN HandleCount;
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EFI_HANDLE *HandleBuffer;
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//
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// According to UEFI spec, there can be at most a single instance
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// in the system of the EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL.
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// So here we check the existence.
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//
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Status = gBS->LocateHandleBuffer (
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ByProtocol,
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&gEfiPlatformDriverOverrideProtocolGuid,
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NULL,
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&HandleCount,
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&HandleBuffer
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);
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//
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// If there was no error, assume there is an installation and return error
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//
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if (!EFI_ERROR (Status)) {
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if (HandleBuffer != NULL) {
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FreePool (HandleBuffer);
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}
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return EFI_ALREADY_STARTED;
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}
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//
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// Install platform driver override protocol
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//
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Handle = NULL;
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Status = gBS->InstallProtocolInterface (
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&Handle,
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&gEfiPlatformDriverOverrideProtocolGuid,
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EFI_NATIVE_INTERFACE,
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gPlatformDriverOverride
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);
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ASSERT_EFI_ERROR (Status);
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return EFI_SUCCESS;
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}
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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_SUCCESS Mapping database successfully freed
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@retval EFI_INVALID_PARAMETER MappingDataBase is NULL
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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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LIST_ENTRY *OverrideItemListIndex;
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LIST_ENTRY *ImageInfoListIndex;
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PLATFORM_OVERRIDE_ITEM *OverrideItem;
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DRIVER_IMAGE_INFO *DriverImageInfo;
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if (MappingDataBase == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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OverrideItemListIndex = GetFirstNode (MappingDataBase);
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while (!IsNull (MappingDataBase, OverrideItemListIndex)) {
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OverrideItem = CR(OverrideItemListIndex, PLATFORM_OVERRIDE_ITEM, Link, PLATFORM_OVERRIDE_ITEM_SIGNATURE);
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//
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// Free PLATFORM_OVERRIDE_ITEM.ControllerDevicePath[]
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//
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if (OverrideItem->ControllerDevicePath != NULL){
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FreePool (OverrideItem->ControllerDevicePath);
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}
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ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
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while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
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//
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// Free DRIVER_IMAGE_INFO.DriverImagePath[]
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//
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DriverImageInfo = CR(ImageInfoListIndex, DRIVER_IMAGE_INFO, Link, DRIVER_IMAGE_INFO_SIGNATURE);
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if (DriverImageInfo->DriverImagePath != NULL) {
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FreePool(DriverImageInfo->DriverImagePath);
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}
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//
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// Free DRIVER_IMAGE_INFO itself
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//
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ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
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RemoveEntryList (&DriverImageInfo->Link);
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FreePool (DriverImageInfo);
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}
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//
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// Free PLATFORM_OVERRIDE_ITEM itself
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//
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OverrideItemListIndex = GetNextNode (MappingDataBase, OverrideItemListIndex);
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RemoveEntryList (&OverrideItem->Link);
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FreePool (OverrideItem);
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}
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InitializeListHead (MappingDataBase);
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return EFI_SUCCESS;
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}
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/**
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Create the mappging database according to variable.
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Read the 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 with those variable info.
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VariableLayout{
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//
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// NotEnd indicate whether the variable is the last one, and has no subsequent variable need to load.
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// Each variable has MaximumVariableSize limitation, so we maybe need multiple variables to store
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// large mapping infos.
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// The variable(s) name rule is PlatDriOver, PlatDriOver1, PlatDriOver2, ....
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//
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UINT32 NotEnd;
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//
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// The entry which contains the mapping that Controller Device Path to a set of Driver Device Paths
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// There are often multi mapping entries in a variable.
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//
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UINT32 SIGNATURE; //EFI_SIGNATURE_32('p','d','o','i')
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UINT32 DriverNum;
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EFI_DEVICE_PATH_PROTOCOL ControllerDevicePath[];
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EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
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EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
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EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
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......
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UINT32 SIGNATURE;
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UINT32 DriverNum;
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EFI_DEVICE_PATH_PROTOCOL ControllerDevicePath[];
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EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
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EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
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EFI_DEVICE_PATH_PROTOCOL DriverDevicePath[];
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......
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}
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@param MappingDataBase Mapping database list entry pointer
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@retval EFI_SUCCESS Create the mapping database in memory successfully
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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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**/
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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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UINTN BufferSize;
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VOID *VariableBuffer;
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UINT8 *VariableIndex;
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UINTN VariableNum;
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CHAR16 OverrideVariableName[40];
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UINT32 NotEnd;
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UINT32 DriverNumber;
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PLATFORM_OVERRIDE_ITEM *OverrideItem;
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DRIVER_IMAGE_INFO *DriverImageInfo;
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BOOLEAN Corrupted;
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UINT32 Signature;
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EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath;
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EFI_DEVICE_PATH_PROTOCOL *DriverDevicePath;
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UINTN Index;
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if (MappingDataBase == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check the environment variable(s) that contain the override mappings .
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//
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VariableBuffer = GetVariableAndSize (L"PlatDriOver", &gEfiOverrideVariableGuid, &BufferSize);
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ASSERT ((UINTN) VariableBuffer % sizeof(UINTN) == 0);
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if (VariableBuffer == NULL) {
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return EFI_NOT_FOUND;
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}
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//
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// Traverse all variables.
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//
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VariableNum = 1;
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Corrupted = FALSE;
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do {
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VariableIndex = VariableBuffer;
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NotEnd = *(UINT32*) VariableIndex;
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//
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// Traverse the entries containing the mapping that Controller Device Path
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// to a set of Driver Device Paths within this variable.
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//
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VariableIndex = VariableIndex + sizeof (UINT32);
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while (VariableIndex < ((UINT8 *)VariableBuffer + BufferSize)) {
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//
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// Check signature of this entry
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//
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Signature = *(UINT32 *) VariableIndex;
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if (Signature != PLATFORM_OVERRIDE_ITEM_SIGNATURE) {
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Corrupted = TRUE;
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break;
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}
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//
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// Create PLATFORM_OVERRIDE_ITEM for this mapping
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//
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OverrideItem = AllocateZeroPool (sizeof (PLATFORM_OVERRIDE_ITEM));
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ASSERT (OverrideItem != NULL);
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OverrideItem->Signature = PLATFORM_OVERRIDE_ITEM_SIGNATURE;
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InitializeListHead (&OverrideItem->DriverInfoList);
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VariableIndex = VariableIndex + sizeof (UINT32);
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//
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// Get DriverNum
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//
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DriverNumber = *(UINT32*) VariableIndex;
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OverrideItem->DriverInfoNum = DriverNumber;
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VariableIndex = VariableIndex + sizeof (UINT32);
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//
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// Get ControllerDevicePath[]
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//
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ControllerDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) VariableIndex;
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OverrideItem->ControllerDevicePath = DuplicateDevicePath (ControllerDevicePath);
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VariableIndex = VariableIndex + GetDevicePathSize (ControllerDevicePath);
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//
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// Align the VariableIndex since the controller device path may not be aligned, refer to the SaveOverridesMapping()
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//
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VariableIndex += ((sizeof(UINT32) - ((UINTN) (VariableIndex))) & (sizeof(UINT32) - 1));
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//
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// Get all DriverDevicePath[]
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//
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for (Index = 0; Index < DriverNumber; Index++) {
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//
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// Create DRIVER_IMAGE_INFO for this DriverDevicePath[]
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//
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DriverImageInfo = AllocateZeroPool (sizeof (DRIVER_IMAGE_INFO));
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ASSERT (DriverImageInfo != NULL);
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DriverImageInfo->Signature = DRIVER_IMAGE_INFO_SIGNATURE;
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DriverDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) VariableIndex;
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DriverImageInfo->DriverImagePath = DuplicateDevicePath (DriverDevicePath);
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VariableIndex = VariableIndex + GetDevicePathSize (DriverDevicePath);
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//
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// Align the VariableIndex since the driver image device path may not be aligned, refer to the SaveOverridesMapping()
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//
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VariableIndex += ((sizeof(UINT32) - ((UINTN) (VariableIndex))) & (sizeof(UINT32) - 1));
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InsertTailList (&OverrideItem->DriverInfoList, &DriverImageInfo->Link);
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}
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InsertTailList (MappingDataBase, &OverrideItem->Link);
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}
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FreePool (VariableBuffer);
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if (Corrupted) {
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FreeMappingDatabase (MappingDataBase);
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return EFI_VOLUME_CORRUPTED;
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}
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//
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// If there are additional variables (PlatDriOver1, PlatDriOver2, PlatDriOver3.....), get them.
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// NotEnd indicates whether current variable is the end variable.
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//
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if (NotEnd != 0) {
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UnicodeSPrint (OverrideVariableName, sizeof (OverrideVariableName), L"PlatDriOver%d", VariableNum);
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VariableBuffer = GetVariableAndSize (OverrideVariableName, &gEfiOverrideVariableGuid, &BufferSize);
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ASSERT ((UINTN) VariableBuffer % sizeof(UINTN) == 0);
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VariableNum++;
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if (VariableBuffer == NULL) {
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FreeMappingDatabase (MappingDataBase);
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return EFI_VOLUME_CORRUPTED;
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}
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}
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} while (NotEnd != 0);
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return EFI_SUCCESS;
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}
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/**
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Calculate the needed size in NV variable for recording a specific PLATFORM_OVERRIDE_ITEM info.
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@param OverrideItemListIndex Pointer to the list of a specific PLATFORM_OVERRIDE_ITEM
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@return The needed size number
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**/
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UINTN
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EFIAPI
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GetOneItemNeededSize (
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IN LIST_ENTRY *OverrideItemListIndex
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)
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{
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UINTN NeededSize;
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PLATFORM_OVERRIDE_ITEM *OverrideItem;
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LIST_ENTRY *ImageInfoListIndex;
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DRIVER_IMAGE_INFO *DriverImageInfo;
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UINTN DevicePathSize;
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NeededSize = 0;
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OverrideItem = CR(OverrideItemListIndex, PLATFORM_OVERRIDE_ITEM, Link, PLATFORM_OVERRIDE_ITEM_SIGNATURE);
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NeededSize += sizeof (UINT32); //UINT32 SIGNATURE;
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NeededSize += sizeof (UINT32); //UINT32 DriverNum;
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DevicePathSize = GetDevicePathSize (OverrideItem->ControllerDevicePath);
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NeededSize += DevicePathSize; // ControllerDevicePath
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//
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// Align the controller device path
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//
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NeededSize += ((sizeof(UINT32) - DevicePathSize) & (sizeof(UINT32) - 1));
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//
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// Traverse the Driver Info List of this Override Item
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//
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ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
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while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
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DriverImageInfo = CR(ImageInfoListIndex, DRIVER_IMAGE_INFO, Link, DRIVER_IMAGE_INFO_SIGNATURE);
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DevicePathSize = GetDevicePathSize (DriverImageInfo->DriverImagePath);
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NeededSize += DevicePathSize; //DriverDevicePath
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//
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// Align the driver image device path
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//
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NeededSize += ((sizeof(UINT32) - DevicePathSize) & (sizeof(UINT32) - 1));
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ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
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}
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return NeededSize;
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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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@param MappingDataBase Mapping database list entry pointer
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@retval EFI_SUCCESS Save memory mapping database successfully
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@retval EFI_INVALID_PARAMETER MappingDataBase pointer is null
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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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EFI_STATUS Status;
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VOID *VariableBuffer;
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UINT8 *VariableIndex;
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UINTN NumIndex;
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CHAR16 OverrideVariableName[40];
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UINT32 NotEnd;
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PLATFORM_OVERRIDE_ITEM *OverrideItem;
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DRIVER_IMAGE_INFO *DriverImageInfo;
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LIST_ENTRY *OverrideItemListIndex;
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LIST_ENTRY *ItemIndex;
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LIST_ENTRY *ImageInfoListIndex;
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UINTN VariableNeededSize;
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UINT64 MaximumVariableStorageSize;
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UINT64 RemainingVariableStorageSize;
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UINT64 MaximumVariableSize;
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UINTN OneItemNeededSize;
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if (MappingDataBase == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (IsListEmpty (MappingDataBase)) {
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Status = DeleteOverridesVariables ();
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ASSERT_EFI_ERROR (Status);
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return EFI_SUCCESS;
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}
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//
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// Get the the maximum size of an individual EFI variable in current system
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//
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gRT->QueryVariableInfo (
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EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
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&MaximumVariableStorageSize,
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&RemainingVariableStorageSize,
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&MaximumVariableSize
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);
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NumIndex = 0;
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OverrideItemListIndex = GetFirstNode (MappingDataBase);
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while (!IsNull (MappingDataBase, OverrideItemListIndex)) {
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//
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// Try to find the most proper variable size which <= MaximumVariableSize,
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// but can contain mapping info as much as possible
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//
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VariableNeededSize = sizeof (UINT32); // NotEnd;
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ItemIndex = OverrideItemListIndex;
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NotEnd = FALSE;
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//
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// Traverse all PLATFORM_OVERRIDE_ITEMs and get the total size.
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//
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while (!IsNull (MappingDataBase, ItemIndex)) {
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OneItemNeededSize = GetOneItemNeededSize (ItemIndex);
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//
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// If the total size exceeds the MaximumVariableSize, then we must use
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// multiple variables.
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//
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if ((VariableNeededSize +
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OneItemNeededSize +
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sizeof (VARIABLE_HEADER) +
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StrSize (L"PlatDriOver ")
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) >= MaximumVariableSize
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) {
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NotEnd = TRUE;
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break;
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}
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VariableNeededSize += OneItemNeededSize;
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ItemIndex = GetNextNode (MappingDataBase, ItemIndex);
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}
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if (NotEnd != 0) {
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if (VariableNeededSize == sizeof (UINT32)) {
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//
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// If an individual EFI variable cannot contain a single Item, return error
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//
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return EFI_OUT_OF_RESOURCES;
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}
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}
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//
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// VariableNeededSize is the most proper variable size, allocate variable buffer
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// ItemIndex now points to the next PLATFORM_OVERRIDE_ITEM which is not covered by VariableNeededSize
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//
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VariableBuffer = AllocateZeroPool (VariableNeededSize);
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ASSERT ((UINTN) VariableBuffer % sizeof(UINTN) == 0);
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//
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// Fill the variable buffer according to MappingDataBase
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//
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VariableIndex = VariableBuffer;
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*(UINT32 *) VariableIndex = NotEnd;
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VariableIndex += sizeof (UINT32); // pass NotEnd
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//
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// ItemIndex points to the next PLATFORM_OVERRIDE_ITEM which is not covered by VariableNeededSize
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//
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while (OverrideItemListIndex != ItemIndex){
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*(UINT32 *) VariableIndex = PLATFORM_OVERRIDE_ITEM_SIGNATURE;
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VariableIndex += sizeof (UINT32); // pass SIGNATURE
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OverrideItem = CR(OverrideItemListIndex, PLATFORM_OVERRIDE_ITEM, Link, PLATFORM_OVERRIDE_ITEM_SIGNATURE);
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*(UINT32 *) VariableIndex = OverrideItem->DriverInfoNum;
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VariableIndex += sizeof (UINT32); // pass DriverNum
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CopyMem (VariableIndex, OverrideItem->ControllerDevicePath, GetDevicePathSize (OverrideItem->ControllerDevicePath));
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VariableIndex += GetDevicePathSize (OverrideItem->ControllerDevicePath); // pass ControllerDevicePath
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//
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// Align the VariableIndex since the controller device path may not be aligned
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//
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VariableIndex += ((sizeof(UINT32) - ((UINTN) (VariableIndex))) & (sizeof(UINT32) - 1));
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//
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// Save the Driver Info List of this PLATFORM_OVERRIDE_ITEM
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//
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ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
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while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
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DriverImageInfo = CR(ImageInfoListIndex, DRIVER_IMAGE_INFO, Link, DRIVER_IMAGE_INFO_SIGNATURE);
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CopyMem (VariableIndex, DriverImageInfo->DriverImagePath, GetDevicePathSize (DriverImageInfo->DriverImagePath));
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VariableIndex += GetDevicePathSize (DriverImageInfo->DriverImagePath); // pass DriverImageDevicePath
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//
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// Align the VariableIndex since the driver image device path may not be aligned
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//
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VariableIndex += ((sizeof(UINT32) - ((UINTN) (VariableIndex))) & (sizeof(UINT32) - 1));
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ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
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}
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OverrideItemListIndex = GetNextNode (MappingDataBase, OverrideItemListIndex);
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}
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ASSERT (((UINTN)VariableIndex - (UINTN)VariableBuffer) == VariableNeededSize);
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if (NumIndex == 0) {
|
|
UnicodeSPrint (OverrideVariableName, sizeof (OverrideVariableName), L"PlatDriOver");
|
|
} else {
|
|
UnicodeSPrint (OverrideVariableName, sizeof (OverrideVariableName), L"PlatDriOver%d", NumIndex );
|
|
}
|
|
|
|
Status = gRT->SetVariable (
|
|
OverrideVariableName,
|
|
&gEfiOverrideVariableGuid,
|
|
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
|
|
VariableNeededSize,
|
|
VariableBuffer
|
|
);
|
|
ASSERT (!EFI_ERROR(Status));
|
|
|
|
NumIndex ++;
|
|
FreePool (VariableBuffer);
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINTN Index;
|
|
UINTN DriverBindingHandleCount;
|
|
EFI_HANDLE *DriverBindingHandleBuffer;
|
|
EFI_DRIVER_BINDING_PROTOCOL *DriverBindingInterface;
|
|
|
|
if (BindingHandle == NULL || ImageHandle == NULL) {
|
|
return NULL;
|
|
}
|
|
//
|
|
// Get all drivers which support driver binding protocol
|
|
//
|
|
DriverBindingHandleCount = 0;
|
|
Status = gBS->LocateHandleBuffer (
|
|
ByProtocol,
|
|
&gEfiDriverBindingProtocolGuid,
|
|
NULL,
|
|
&DriverBindingHandleCount,
|
|
&DriverBindingHandleBuffer
|
|
);
|
|
if (EFI_ERROR (Status) || (DriverBindingHandleCount == 0)) {
|
|
return NULL;
|
|
}
|
|
|
|
for (Index = 0; Index < DriverBindingHandleCount; Index++) {
|
|
DriverBindingInterface = NULL;
|
|
Status = gBS->OpenProtocol (
|
|
DriverBindingHandleBuffer[Index],
|
|
&gEfiDriverBindingProtocolGuid,
|
|
(VOID **) &DriverBindingInterface,
|
|
NULL,
|
|
NULL,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
continue;
|
|
}
|
|
|
|
if (DriverBindingInterface->ImageHandle == ImageHandle) {
|
|
*BindingHandle = DriverBindingHandleBuffer[Index];
|
|
FreePool (DriverBindingHandleBuffer);
|
|
return DriverBindingInterface;
|
|
}
|
|
}
|
|
|
|
//
|
|
// If no Driver Binding Protocol instance is found
|
|
//
|
|
FreePool (DriverBindingHandleBuffer);
|
|
*BindingHandle = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Return the current TPL.
|
|
|
|
@return Current TPL
|
|
|
|
**/
|
|
EFI_TPL
|
|
GetCurrentTpl (
|
|
VOID
|
|
)
|
|
{
|
|
EFI_TPL Tpl;
|
|
|
|
Tpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
|
|
gBS->RestoreTPL (Tpl);
|
|
|
|
return Tpl;
|
|
}
|
|
|
|
|
|
/**
|
|
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 input, the previously returnd driver image handle.
|
|
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 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 Status;
|
|
EFI_DEVICE_PATH_PROTOCOL *ControllerDevicePath;
|
|
BOOLEAN ControllerFound;
|
|
BOOLEAN ImageFound;
|
|
EFI_HANDLE *ImageHandleBuffer;
|
|
UINTN ImageHandleCount;
|
|
UINTN Index;
|
|
EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
|
|
EFI_HANDLE DriverBindingHandle;
|
|
BOOLEAN FoundLastReturned;
|
|
PLATFORM_OVERRIDE_ITEM *OverrideItem;
|
|
DRIVER_IMAGE_INFO *DriverImageInfo;
|
|
LIST_ENTRY *OverrideItemListIndex;
|
|
LIST_ENTRY *ImageInfoListIndex;
|
|
EFI_DEVICE_PATH_PROTOCOL *TempDriverImagePath;
|
|
EFI_HANDLE ImageHandle;
|
|
EFI_HANDLE Handle;
|
|
EFI_DEVICE_PATH_PROTOCOL *LoadedImageDevicePath;
|
|
EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *BusSpecificDriverOverride;
|
|
UINTN DevicePathSize;
|
|
|
|
//
|
|
// Check that ControllerHandle is a valid handle
|
|
//
|
|
if (ControllerHandle == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
//
|
|
// Get the device path of ControllerHandle
|
|
//
|
|
Status = gBS->HandleProtocol (
|
|
ControllerHandle,
|
|
&gEfiDevicePathProtocolGuid,
|
|
(VOID **) &ControllerDevicePath
|
|
);
|
|
if (EFI_ERROR (Status) || ControllerDevicePath == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Search ControllerDevicePath in MappingDataBase
|
|
//
|
|
OverrideItem = NULL;
|
|
ControllerFound = FALSE;
|
|
DevicePathSize = GetDevicePathSize (ControllerDevicePath);
|
|
|
|
OverrideItemListIndex = GetFirstNode (MappingDataBase);
|
|
while (!IsNull (MappingDataBase, OverrideItemListIndex)) {
|
|
OverrideItem = CR(OverrideItemListIndex, PLATFORM_OVERRIDE_ITEM, Link, PLATFORM_OVERRIDE_ITEM_SIGNATURE);
|
|
if (DevicePathSize == GetDevicePathSize (OverrideItem->ControllerDevicePath)) {
|
|
if (CompareMem (
|
|
ControllerDevicePath,
|
|
OverrideItem->ControllerDevicePath,
|
|
DevicePathSize
|
|
) == 0
|
|
) {
|
|
ControllerFound = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
OverrideItemListIndex = GetNextNode (MappingDataBase, OverrideItemListIndex);
|
|
}
|
|
|
|
if (!ControllerFound) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
//
|
|
// Passing in a pointer to NULL, will return the first driver device path for ControllerHandle.
|
|
// Check whether the driverImagePath is not a device path that was returned on a previous call to GetDriverPath().
|
|
//
|
|
if (*DriverImageHandle != NULL) {
|
|
if (*DriverImageHandle != OverrideItem->LastReturnedImageHandle) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
//
|
|
// The GetDriverPath() may be called recursively, because it use ConnectDevicePath() internally,
|
|
// so should check whether there is a dead loop.
|
|
// Here use a controller device path stack to record all processed controller device path during a GetDriverPath() call,
|
|
// and check the controller device path whether appear again during the GetDriverPath() call.
|
|
//
|
|
if (CheckExistInStack (OverrideItem->ControllerDevicePath)) {
|
|
//
|
|
// There is a dependecy dead loop if the ControllerDevicePath appear in stack twice
|
|
//
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
PushDevPathStack (OverrideItem->ControllerDevicePath);
|
|
|
|
//
|
|
// Check every override driver, try to load and start them
|
|
//
|
|
ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
|
|
while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
|
|
DriverImageInfo = CR(ImageInfoListIndex, DRIVER_IMAGE_INFO, Link, DRIVER_IMAGE_INFO_SIGNATURE);
|
|
if (DriverImageInfo->ImageHandle == NULL) {
|
|
//
|
|
// Skip if the image is unloadable or unstartable
|
|
//
|
|
if ((!DriverImageInfo->UnLoadable) && ((!DriverImageInfo->UnStartable))) {
|
|
TempDriverImagePath = DriverImageInfo->DriverImagePath;
|
|
//
|
|
// If the image device path contains an FV node, check the FV file device path is valid.
|
|
// If it is invalid, try to return the valid device path.
|
|
// FV address maybe changes for memory layout adjust from time to time,
|
|
// use this funciton could promise the FV file device path is right.
|
|
//
|
|
Status = UpdateFvFileDevicePath (&TempDriverImagePath, NULL, CallerImageHandle);
|
|
if (!EFI_ERROR (Status)) {
|
|
FreePool (DriverImageInfo->DriverImagePath);
|
|
DriverImageInfo->DriverImagePath = TempDriverImagePath;
|
|
}
|
|
//
|
|
// Get all Loaded Image protocol to check whether the driver image has been loaded and started
|
|
//
|
|
ImageFound = FALSE;
|
|
ImageHandleCount = 0;
|
|
Status = gBS->LocateHandleBuffer (
|
|
ByProtocol,
|
|
&gEfiLoadedImageProtocolGuid,
|
|
NULL,
|
|
&ImageHandleCount,
|
|
&ImageHandleBuffer
|
|
);
|
|
if (EFI_ERROR (Status) || (ImageHandleCount == 0)) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
for(Index = 0; Index < ImageHandleCount; Index ++) {
|
|
//
|
|
// Get the EFI Loaded Image Device Path Protocol
|
|
//
|
|
LoadedImageDevicePath = NULL;
|
|
Status = gBS->HandleProtocol (
|
|
ImageHandleBuffer[Index],
|
|
&gEfiLoadedImageDevicePathProtocolGuid,
|
|
(VOID **) &LoadedImageDevicePath
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
//
|
|
// Maybe not all EFI_LOADED_IMAGE_DEVICE_PATH_PROTOCOL existed.
|
|
//
|
|
continue;
|
|
}
|
|
|
|
DevicePathSize = GetDevicePathSize (DriverImageInfo->DriverImagePath);
|
|
if (DevicePathSize == GetDevicePathSize (LoadedImageDevicePath)) {
|
|
if (CompareMem (
|
|
DriverImageInfo->DriverImagePath,
|
|
LoadedImageDevicePath,
|
|
GetDevicePathSize (LoadedImageDevicePath)
|
|
) == 0
|
|
) {
|
|
ImageFound = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ImageFound) {
|
|
//
|
|
// Find its related driver binding protocol
|
|
// Driver binding handle may be different with its driver's Image Handle.
|
|
//
|
|
DriverBindingHandle = NULL;
|
|
DriverBinding = GetBindingProtocolFromImageHandle (
|
|
ImageHandleBuffer[Index],
|
|
&DriverBindingHandle
|
|
);
|
|
ASSERT (DriverBinding != NULL);
|
|
DriverImageInfo->ImageHandle = ImageHandleBuffer[Index];
|
|
} else if (GetCurrentTpl() <= TPL_CALLBACK){
|
|
//
|
|
// The driver image has not been loaded and started. Try to load and start it now.
|
|
// Try to connect all device in the driver image path.
|
|
//
|
|
// Note: LoadImage() and StartImage() should be called under CALLBACK TPL in theory, but
|
|
// since many device need to be connected in CALLBACK level environment( e.g. Usb devices )
|
|
// and the Fat and Patition driver can endure executing in CALLBACK level in fact, so here permit
|
|
// to use LoadImage() and StartImage() in CALLBACK TPL.
|
|
//
|
|
Status = ConnectDevicePath (DriverImageInfo->DriverImagePath);
|
|
//
|
|
// check whether it points to a PCI Option Rom image,
|
|
// and try to use bus override protocol to get its first option rom image driver
|
|
//
|
|
TempDriverImagePath = DriverImageInfo->DriverImagePath;
|
|
gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &TempDriverImagePath, &Handle);
|
|
//
|
|
// Get the Bus Specific Driver Override Protocol instance on the Controller Handle
|
|
//
|
|
Status = gBS->HandleProtocol(
|
|
Handle,
|
|
&gEfiBusSpecificDriverOverrideProtocolGuid,
|
|
(VOID **) &BusSpecificDriverOverride
|
|
);
|
|
if (!EFI_ERROR (Status) && (BusSpecificDriverOverride != NULL)) {
|
|
ImageHandle = NULL;
|
|
Status = BusSpecificDriverOverride->GetDriver (
|
|
BusSpecificDriverOverride,
|
|
&ImageHandle
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
//
|
|
// Find its related driver binding protocol
|
|
// Driver binding handle may be different with its driver's Image handle
|
|
//
|
|
DriverBindingHandle = NULL;
|
|
DriverBinding = GetBindingProtocolFromImageHandle (
|
|
ImageHandle,
|
|
&DriverBindingHandle
|
|
);
|
|
ASSERT (DriverBinding != NULL);
|
|
DriverImageInfo->ImageHandle = ImageHandle;
|
|
}
|
|
}
|
|
//
|
|
// Skip if any device cannot be connected now, future passes through GetDriver() may be able to load that driver.
|
|
// Only file path media or FwVol Device Path Node remain if all device is connected
|
|
//
|
|
TempDriverImagePath = DriverImageInfo->DriverImagePath;
|
|
gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &TempDriverImagePath, &Handle);
|
|
if (((DevicePathType (TempDriverImagePath) == MEDIA_DEVICE_PATH) &&
|
|
(DevicePathSubType (TempDriverImagePath) == MEDIA_FILEPATH_DP)) ||
|
|
(EfiGetNameGuidFromFwVolDevicePathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) TempDriverImagePath) != NULL)
|
|
) {
|
|
//
|
|
// Try to load the driver
|
|
//
|
|
TempDriverImagePath = DriverImageInfo->DriverImagePath;
|
|
Status = gBS->LoadImage (
|
|
FALSE,
|
|
CallerImageHandle,
|
|
TempDriverImagePath,
|
|
NULL,
|
|
0,
|
|
&ImageHandle
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
//
|
|
// Try to start the driver
|
|
//
|
|
Status = gBS->StartImage (ImageHandle, NULL, NULL);
|
|
if (EFI_ERROR (Status)){
|
|
DriverImageInfo->UnStartable = TRUE;
|
|
DriverImageInfo->ImageHandle = NULL;
|
|
} else {
|
|
//
|
|
// Find its related driver binding protocol
|
|
// Driver binding handle may be different with its driver's Image handle
|
|
//
|
|
DriverBindingHandle = NULL;
|
|
DriverBinding = GetBindingProtocolFromImageHandle (
|
|
ImageHandle,
|
|
&DriverBindingHandle
|
|
);
|
|
ASSERT (DriverBinding != NULL);
|
|
DriverImageInfo->ImageHandle = ImageHandle;
|
|
}
|
|
} else {
|
|
DriverImageInfo->UnLoadable = TRUE;
|
|
DriverImageInfo->ImageHandle = NULL;
|
|
}
|
|
}
|
|
}
|
|
FreePool (ImageHandleBuffer);
|
|
}
|
|
}
|
|
ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
|
|
}
|
|
//
|
|
// Finish try to load and start the override driver of a controller, popup the controller's device path
|
|
//
|
|
PopDevPathStack (NULL);
|
|
|
|
//
|
|
// return the DriverImageHandle for ControllerHandle
|
|
//
|
|
FoundLastReturned = FALSE;
|
|
ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
|
|
while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
|
|
DriverImageInfo = CR(ImageInfoListIndex, DRIVER_IMAGE_INFO, Link, DRIVER_IMAGE_INFO_SIGNATURE);
|
|
if (DriverImageInfo->ImageHandle != NULL) {
|
|
if ((*DriverImageHandle == NULL) || FoundLastReturned) {
|
|
//
|
|
// If DriverImageHandle is NULL, then we just need to return the first driver.
|
|
// If FoundLastReturned, this means we have just encountered the previously returned driver.
|
|
// For both cases, we just return the image handle of this driver.
|
|
//
|
|
OverrideItem->LastReturnedImageHandle = DriverImageInfo->ImageHandle;
|
|
*DriverImageHandle = DriverImageInfo->ImageHandle;
|
|
return EFI_SUCCESS;
|
|
} else if (*DriverImageHandle == DriverImageInfo->ImageHandle){
|
|
//
|
|
// We have found the previously returned driver.
|
|
//
|
|
FoundLastReturned = TRUE;
|
|
}
|
|
}
|
|
ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
|
|
}
|
|
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
|
|
/**
|
|
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 OPTIONAL,
|
|
IN LIST_ENTRY *MappingDataBase,
|
|
OUT UINT32 *DriverInfoNum OPTIONAL,
|
|
OUT UINT32 *DriverImageNO OPTIONAL
|
|
)
|
|
{
|
|
LIST_ENTRY *OverrideItemListIndex;
|
|
PLATFORM_OVERRIDE_ITEM *OverrideItem;
|
|
LIST_ENTRY *ImageInfoListIndex;
|
|
DRIVER_IMAGE_INFO *DriverImageInfo;
|
|
BOOLEAN Found;
|
|
UINT32 ImageNO;
|
|
UINTN DevicePathSize;
|
|
|
|
if (ControllerDevicePath == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
if (MappingDataBase == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Search ControllerDevicePath in MappingDataBase
|
|
//
|
|
Found = FALSE;
|
|
OverrideItem = NULL;
|
|
OverrideItemListIndex = GetFirstNode (MappingDataBase);
|
|
while (!IsNull (MappingDataBase, OverrideItemListIndex)) {
|
|
OverrideItem = CR(OverrideItemListIndex, PLATFORM_OVERRIDE_ITEM, Link, PLATFORM_OVERRIDE_ITEM_SIGNATURE);
|
|
DevicePathSize = GetDevicePathSize (ControllerDevicePath);
|
|
if (DevicePathSize == GetDevicePathSize (OverrideItem->ControllerDevicePath)) {
|
|
if (CompareMem (
|
|
ControllerDevicePath,
|
|
OverrideItem->ControllerDevicePath,
|
|
DevicePathSize
|
|
) == 0
|
|
) {
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
OverrideItemListIndex = GetNextNode (MappingDataBase, OverrideItemListIndex);
|
|
}
|
|
|
|
if (!Found) {
|
|
//
|
|
// ControllerDevicePath is not in MappingDataBase
|
|
//
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
ASSERT (OverrideItem->DriverInfoNum != 0);
|
|
if (DriverInfoNum != NULL) {
|
|
*DriverInfoNum = OverrideItem->DriverInfoNum;
|
|
}
|
|
|
|
//
|
|
// If DriverImageDevicePath is NULL, skip checking DriverImageDevicePath
|
|
// in the controller's Driver Image Info List
|
|
//
|
|
if (DriverImageDevicePath == NULL) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
//
|
|
// return the DriverImageHandle for ControllerHandle
|
|
//
|
|
ImageNO = 0;
|
|
Found = FALSE;
|
|
ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
|
|
while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
|
|
DriverImageInfo = CR(ImageInfoListIndex, DRIVER_IMAGE_INFO, Link, DRIVER_IMAGE_INFO_SIGNATURE);
|
|
ImageNO++;
|
|
DevicePathSize = GetDevicePathSize (DriverImageDevicePath);
|
|
if (DevicePathSize == GetDevicePathSize (DriverImageInfo->DriverImagePath)) {
|
|
if (CompareMem (
|
|
DriverImageDevicePath,
|
|
DriverImageInfo->DriverImagePath,
|
|
GetDevicePathSize (DriverImageInfo->DriverImagePath)
|
|
) == 0
|
|
) {
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
|
|
}
|
|
|
|
if (!Found) {
|
|
//
|
|
// DriverImageDevicePath is not found in the controller's Driver Image Info List
|
|
//
|
|
return EFI_NOT_FOUND;
|
|
} else {
|
|
if (DriverImageNO != NULL) {
|
|
*DriverImageNO = ImageNO;
|
|
}
|
|
return EFI_SUCCESS;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
LIST_ENTRY *OverrideItemListIndex;
|
|
PLATFORM_OVERRIDE_ITEM *OverrideItem;
|
|
LIST_ENTRY *ImageInfoListIndex;
|
|
DRIVER_IMAGE_INFO *DriverImageInfo;
|
|
BOOLEAN Found;
|
|
UINT32 ImageNO;
|
|
UINTN DevicePathSize;
|
|
|
|
if (ControllerDevicePath == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
if (DriverImageDevicePath == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
if (MappingDataBase == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// If the driver is already in the controller's Driver Image Info List,
|
|
// just return EFI_ALREADY_STARTED.
|
|
//
|
|
Status = CheckMapping (
|
|
ControllerDevicePath,
|
|
DriverImageDevicePath,
|
|
MappingDataBase,
|
|
NULL,
|
|
NULL
|
|
);
|
|
if (Status == EFI_SUCCESS) {
|
|
return EFI_ALREADY_STARTED;
|
|
}
|
|
|
|
//
|
|
// Search the input ControllerDevicePath in MappingDataBase
|
|
//
|
|
Found = FALSE;
|
|
OverrideItem = NULL;
|
|
OverrideItemListIndex = GetFirstNode (MappingDataBase);
|
|
while (!IsNull (MappingDataBase, OverrideItemListIndex)) {
|
|
OverrideItem = CR(OverrideItemListIndex, PLATFORM_OVERRIDE_ITEM, Link, PLATFORM_OVERRIDE_ITEM_SIGNATURE);
|
|
DevicePathSize = GetDevicePathSize (ControllerDevicePath);
|
|
if (DevicePathSize == GetDevicePathSize (OverrideItem->ControllerDevicePath)) {
|
|
if (CompareMem (
|
|
ControllerDevicePath,
|
|
OverrideItem->ControllerDevicePath,
|
|
DevicePathSize
|
|
) == 0
|
|
) {
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
OverrideItemListIndex = GetNextNode (MappingDataBase, OverrideItemListIndex);
|
|
}
|
|
//
|
|
// If cannot find, this is a new controller item
|
|
// Add the Controller related PLATFORM_OVERRIDE_ITEM structrue in mapping data base
|
|
//
|
|
if (!Found) {
|
|
OverrideItem = AllocateZeroPool (sizeof (PLATFORM_OVERRIDE_ITEM));
|
|
ASSERT (OverrideItem != NULL);
|
|
OverrideItem->Signature = PLATFORM_OVERRIDE_ITEM_SIGNATURE;
|
|
OverrideItem->ControllerDevicePath = DuplicateDevicePath (ControllerDevicePath);
|
|
InitializeListHead (&OverrideItem->DriverInfoList);
|
|
InsertTailList (MappingDataBase, &OverrideItem->Link);
|
|
}
|
|
|
|
//
|
|
// Prepare the driver image related DRIVER_IMAGE_INFO structure.
|
|
//
|
|
DriverImageInfo = AllocateZeroPool (sizeof (DRIVER_IMAGE_INFO));
|
|
ASSERT (DriverImageInfo != NULL);
|
|
DriverImageInfo->Signature = DRIVER_IMAGE_INFO_SIGNATURE;
|
|
DriverImageInfo->DriverImagePath = DuplicateDevicePath (DriverImageDevicePath);
|
|
//
|
|
// Find the driver image wanted order location
|
|
//
|
|
ImageNO = 0;
|
|
Found = FALSE;
|
|
ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
|
|
while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
|
|
if (ImageNO == (DriverImageNO - 1)) {
|
|
//
|
|
// find the wanted order location, insert it
|
|
//
|
|
InsertTailList (ImageInfoListIndex, &DriverImageInfo->Link);
|
|
OverrideItem->DriverInfoNum ++;
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
ImageNO++;
|
|
ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
|
|
}
|
|
|
|
if (!Found) {
|
|
//
|
|
// if not find the wantted order location, add it as last item of the controller mapping item
|
|
//
|
|
InsertTailList (&OverrideItem->DriverInfoList, &DriverImageInfo->Link);
|
|
OverrideItem->DriverInfoNum ++;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
LIST_ENTRY *OverrideItemListIndex;
|
|
PLATFORM_OVERRIDE_ITEM *OverrideItem;
|
|
LIST_ENTRY *ImageInfoListIndex;
|
|
DRIVER_IMAGE_INFO *DriverImageInfo;
|
|
BOOLEAN Found;
|
|
UINTN DevicePathSize;
|
|
|
|
if (ControllerDevicePath == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (MappingDataBase == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// If ControllerDevicePath is not found in mapping database, return EFI_NOT_FOUND.
|
|
//
|
|
Status = CheckMapping (
|
|
ControllerDevicePath,
|
|
DriverImageDevicePath,
|
|
MappingDataBase,
|
|
NULL,
|
|
NULL
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
//
|
|
// Search ControllerDevicePath in MappingDataBase
|
|
//
|
|
Found = FALSE;
|
|
OverrideItem = NULL;
|
|
OverrideItemListIndex = GetFirstNode (MappingDataBase);
|
|
while (!IsNull (MappingDataBase, OverrideItemListIndex)) {
|
|
OverrideItem = CR(OverrideItemListIndex, PLATFORM_OVERRIDE_ITEM, Link, PLATFORM_OVERRIDE_ITEM_SIGNATURE);
|
|
DevicePathSize = GetDevicePathSize (ControllerDevicePath);
|
|
if (DevicePathSize == GetDevicePathSize (OverrideItem->ControllerDevicePath)) {
|
|
if (CompareMem (
|
|
ControllerDevicePath,
|
|
OverrideItem->ControllerDevicePath,
|
|
DevicePathSize
|
|
) == 0
|
|
) {
|
|
Found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
OverrideItemListIndex = GetNextNode (MappingDataBase, OverrideItemListIndex);
|
|
}
|
|
|
|
ASSERT (Found);
|
|
ASSERT (OverrideItem->DriverInfoNum != 0);
|
|
|
|
Found = FALSE;
|
|
ImageInfoListIndex = GetFirstNode (&OverrideItem->DriverInfoList);
|
|
while (!IsNull (&OverrideItem->DriverInfoList, ImageInfoListIndex)) {
|
|
DriverImageInfo = CR(ImageInfoListIndex, DRIVER_IMAGE_INFO, Link, DRIVER_IMAGE_INFO_SIGNATURE);
|
|
ImageInfoListIndex = GetNextNode (&OverrideItem->DriverInfoList, ImageInfoListIndex);
|
|
if (DriverImageDevicePath != NULL) {
|
|
//
|
|
// Search for the specified DriverImageDevicePath and remove it, then break.
|
|
//
|
|
DevicePathSize = GetDevicePathSize (DriverImageDevicePath);
|
|
if (DevicePathSize == GetDevicePathSize (DriverImageInfo->DriverImagePath)) {
|
|
if (CompareMem (
|
|
DriverImageDevicePath,
|
|
DriverImageInfo->DriverImagePath,
|
|
GetDevicePathSize (DriverImageInfo->DriverImagePath)
|
|
) == 0
|
|
) {
|
|
Found = TRUE;
|
|
FreePool(DriverImageInfo->DriverImagePath);
|
|
RemoveEntryList (&DriverImageInfo->Link);
|
|
OverrideItem->DriverInfoNum --;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
//
|
|
// Remove all existing driver image info entries, so no break here.
|
|
//
|
|
Found = TRUE;
|
|
FreePool(DriverImageInfo->DriverImagePath);
|
|
RemoveEntryList (&DriverImageInfo->Link);
|
|
OverrideItem->DriverInfoNum --;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Confirm all driver image info entries have been removed,
|
|
// if DriverImageDevicePath is NULL.
|
|
//
|
|
if (DriverImageDevicePath == NULL) {
|
|
ASSERT (OverrideItem->DriverInfoNum == 0);
|
|
}
|
|
//
|
|
// If Override Item has no driver image info entry, then delete this item.
|
|
//
|
|
if (OverrideItem->DriverInfoNum == 0) {
|
|
FreePool(OverrideItem->ControllerDevicePath);
|
|
RemoveEntryList (&OverrideItem->Link);
|
|
FreePool (OverrideItem);
|
|
}
|
|
|
|
if (!Found) {
|
|
//
|
|
// DriverImageDevicePath is not NULL and cannot be found in the controller's
|
|
// driver image info list.
|
|
//
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
VOID *VariableBuffer;
|
|
UINTN VariableNum;
|
|
UINTN BufferSize;
|
|
UINTN Index;
|
|
CHAR16 OverrideVariableName[40];
|
|
|
|
//
|
|
// Get environment variable(s) number
|
|
//
|
|
VariableNum = 0;
|
|
VariableBuffer = GetVariableAndSize (L"PlatDriOver", &gEfiOverrideVariableGuid, &BufferSize);
|
|
VariableNum++;
|
|
if (VariableBuffer == NULL) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
//
|
|
// Check NotEnd to get all PlatDriOverX variable(s)
|
|
//
|
|
while ((*(UINT32*)VariableBuffer) != 0) {
|
|
UnicodeSPrint (OverrideVariableName, sizeof (OverrideVariableName), L"PlatDriOver%d", VariableNum);
|
|
VariableBuffer = GetVariableAndSize (OverrideVariableName, &gEfiOverrideVariableGuid, &BufferSize);
|
|
VariableNum++;
|
|
ASSERT (VariableBuffer != NULL);
|
|
}
|
|
|
|
//
|
|
// Delete PlatDriOver and all additional variables, if exist.
|
|
//
|
|
Status = gRT->SetVariable (
|
|
L"PlatDriOver",
|
|
&gEfiOverrideVariableGuid,
|
|
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
|
|
0,
|
|
NULL
|
|
);
|
|
ASSERT (!EFI_ERROR (Status));
|
|
for (Index = 1; Index < VariableNum; Index++) {
|
|
UnicodeSPrint (OverrideVariableName, sizeof (OverrideVariableName), L"PlatDriOver%d", Index);
|
|
Status = gRT->SetVariable (
|
|
OverrideVariableName,
|
|
&gEfiOverrideVariableGuid,
|
|
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
|
|
0,
|
|
NULL
|
|
);
|
|
ASSERT (!EFI_ERROR (Status));
|
|
}
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
Push a controller device path into a globle device path list.
|
|
|
|
@param DevicePath The controller device path to push into stack
|
|
|
|
@retval EFI_SUCCESS Device path successfully pushed into the stack.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PushDevPathStack (
|
|
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
|
|
)
|
|
{
|
|
DEVICE_PATH_STACK_ITEM *DevicePathStackItem;
|
|
|
|
DevicePathStackItem = AllocateZeroPool (sizeof (DEVICE_PATH_STACK_ITEM));
|
|
ASSERT (DevicePathStackItem != NULL);
|
|
DevicePathStackItem->Signature = DEVICE_PATH_STACK_ITEM_SIGNATURE;
|
|
DevicePathStackItem->DevicePath = DuplicateDevicePath (DevicePath);
|
|
InsertTailList (&mDevicePathStack, &DevicePathStackItem->Link);
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
Pop a controller device path from a globle device path list
|
|
|
|
@param DevicePath The controller device path popped from stack
|
|
|
|
@retval EFI_SUCCESS Controller device path successfully popped.
|
|
@retval EFI_NOT_FOUND Stack is empty.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PopDevPathStack (
|
|
OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
|
|
)
|
|
{
|
|
DEVICE_PATH_STACK_ITEM *DevicePathStackItem;
|
|
LIST_ENTRY *ItemListIndex;
|
|
|
|
ItemListIndex = mDevicePathStack.BackLink;
|
|
//
|
|
// Check if the stack is empty
|
|
//
|
|
if (ItemListIndex != &mDevicePathStack){
|
|
DevicePathStackItem = CR(ItemListIndex, DEVICE_PATH_STACK_ITEM, Link, DEVICE_PATH_STACK_ITEM_SIGNATURE);
|
|
if (DevicePath != NULL) {
|
|
*DevicePath = DuplicateDevicePath (DevicePathStackItem->DevicePath);
|
|
}
|
|
FreePool (DevicePathStackItem->DevicePath);
|
|
RemoveEntryList (&DevicePathStackItem->Link);
|
|
FreePool (DevicePathStackItem);
|
|
return EFI_SUCCESS;
|
|
}
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
|
|
/**
|
|
Check whether a controller device path is in a globle device path list
|
|
|
|
@param DevicePath The controller device path to check
|
|
|
|
@retval TRUE DevicePath exists in the stack.
|
|
@retval FALSE DevicePath does not exist in the stack.
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
CheckExistInStack (
|
|
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
|
|
)
|
|
{
|
|
DEVICE_PATH_STACK_ITEM *DevicePathStackItem;
|
|
LIST_ENTRY *ItemListIndex;
|
|
UINTN DevicePathSize;
|
|
|
|
ItemListIndex = mDevicePathStack.BackLink;
|
|
while (ItemListIndex != &mDevicePathStack){
|
|
DevicePathStackItem = CR(ItemListIndex, DEVICE_PATH_STACK_ITEM, Link, DEVICE_PATH_STACK_ITEM_SIGNATURE);
|
|
DevicePathSize = GetDevicePathSize (DevicePath);
|
|
if (DevicePathSize == GetDevicePathSize (DevicePathStackItem->DevicePath)) {
|
|
if (CompareMem (DevicePath, DevicePathStackItem->DevicePath, DevicePathSize) == 0) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
ItemListIndex = ItemListIndex->BackLink;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/**
|
|
Update the FV file device path if it is not valid.
|
|
|
|
According to a file GUID, check a Fv file device path is valid. If it is invalid,
|
|
try to return the valid device path.
|
|
FV address maybe changes for memory layout adjust from time to time, use this funciton
|
|
could promise the Fv file device path is right.
|
|
|
|
@param DevicePath On input, the FV file device path to check
|
|
On output, the updated valid FV file device path
|
|
@param FileGuid The FV file GUID
|
|
@param CallerImageHandle Image handle of the caller
|
|
|
|
@retval EFI_INVALID_PARAMETER the input DevicePath or FileGuid is invalid
|
|
parameter
|
|
@retval EFI_UNSUPPORTED the input DevicePath does not contain FV file
|
|
GUID at all
|
|
@retval EFI_ALREADY_STARTED the input DevicePath has pointed to FV file, it
|
|
is valid
|
|
@retval EFI_SUCCESS Successfully updated the invalid DevicePath,
|
|
and return the updated device path in DevicePath
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
UpdateFvFileDevicePath (
|
|
IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,
|
|
IN EFI_GUID *FileGuid,
|
|
IN EFI_HANDLE CallerImageHandle
|
|
)
|
|
{
|
|
EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;
|
|
EFI_DEVICE_PATH_PROTOCOL *LastDeviceNode;
|
|
EFI_STATUS Status;
|
|
EFI_GUID *GuidPoint;
|
|
UINTN Index;
|
|
UINTN FvHandleCount;
|
|
EFI_HANDLE *FvHandleBuffer;
|
|
EFI_FV_FILETYPE Type;
|
|
UINTN Size;
|
|
EFI_FV_FILE_ATTRIBUTES Attributes;
|
|
UINT32 AuthenticationStatus;
|
|
BOOLEAN FindFvFile;
|
|
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
|
|
EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;
|
|
MEDIA_FW_VOL_FILEPATH_DEVICE_PATH FvFileNode;
|
|
EFI_HANDLE FoundFvHandle;
|
|
EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;
|
|
BOOLEAN HasFvNode;
|
|
|
|
if (DevicePath == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (*DevicePath == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Check whether the device path points to the default the input FV file
|
|
//
|
|
TempDevicePath = *DevicePath;
|
|
LastDeviceNode = TempDevicePath;
|
|
while (!IsDevicePathEnd (TempDevicePath)) {
|
|
LastDeviceNode = TempDevicePath;
|
|
TempDevicePath = NextDevicePathNode (TempDevicePath);
|
|
}
|
|
GuidPoint = EfiGetNameGuidFromFwVolDevicePathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LastDeviceNode);
|
|
if (GuidPoint == NULL) {
|
|
//
|
|
// If this option does not point to a FV file, just return EFI_UNSUPPORTED.
|
|
//
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
if (FileGuid != NULL) {
|
|
if (!CompareGuid (GuidPoint, FileGuid)) {
|
|
//
|
|
// If the FV file is not the input file GUID, just return EFI_UNSUPPORTED
|
|
//
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
} else {
|
|
FileGuid = GuidPoint;
|
|
}
|
|
|
|
//
|
|
// Check to see if the device path contains memory map node
|
|
//
|
|
TempDevicePath = *DevicePath;
|
|
HasFvNode = FALSE;
|
|
while (!IsDevicePathEnd (TempDevicePath)) {
|
|
//
|
|
// Use old Device Path
|
|
//
|
|
if (DevicePathType (TempDevicePath) == HARDWARE_DEVICE_PATH &&
|
|
DevicePathSubType (TempDevicePath) == HW_MEMMAP_DP) {
|
|
HasFvNode = TRUE;
|
|
break;
|
|
}
|
|
TempDevicePath = NextDevicePathNode (TempDevicePath);
|
|
}
|
|
|
|
if (!HasFvNode) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
//
|
|
// Check whether the input Fv file device path is valid
|
|
//
|
|
TempDevicePath = *DevicePath;
|
|
FoundFvHandle = NULL;
|
|
Status = gBS->LocateDevicePath (
|
|
&gEfiFirmwareVolume2ProtocolGuid,
|
|
&TempDevicePath,
|
|
&FoundFvHandle
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
Status = gBS->HandleProtocol (
|
|
FoundFvHandle,
|
|
&gEfiFirmwareVolume2ProtocolGuid,
|
|
(VOID **) &Fv
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
//
|
|
// Set FV ReadFile Buffer as NULL, only need to check whether input Fv file exist there
|
|
//
|
|
Status = Fv->ReadFile (
|
|
Fv,
|
|
FileGuid,
|
|
NULL,
|
|
&Size,
|
|
&Type,
|
|
&Attributes,
|
|
&AuthenticationStatus
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
return EFI_ALREADY_STARTED;
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Look for the input wanted FV file in current FV
|
|
// First, try to look for in Caller own FV. Caller and input wanted FV file usually are in the same FV
|
|
//
|
|
FindFvFile = FALSE;
|
|
FoundFvHandle = NULL;
|
|
Status = gBS->HandleProtocol (
|
|
CallerImageHandle,
|
|
&gEfiLoadedImageProtocolGuid,
|
|
(VOID **) &LoadedImage
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
Status = gBS->HandleProtocol (
|
|
LoadedImage->DeviceHandle,
|
|
&gEfiFirmwareVolume2ProtocolGuid,
|
|
(VOID **) &Fv
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
Status = Fv->ReadFile (
|
|
Fv,
|
|
FileGuid,
|
|
NULL,
|
|
&Size,
|
|
&Type,
|
|
&Attributes,
|
|
&AuthenticationStatus
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
FindFvFile = TRUE;
|
|
FoundFvHandle = LoadedImage->DeviceHandle;
|
|
}
|
|
}
|
|
}
|
|
//
|
|
// Second, if fail to find, try to enumerate all FV
|
|
//
|
|
if (!FindFvFile) {
|
|
gBS->LocateHandleBuffer (
|
|
ByProtocol,
|
|
&gEfiFirmwareVolume2ProtocolGuid,
|
|
NULL,
|
|
&FvHandleCount,
|
|
&FvHandleBuffer
|
|
);
|
|
for (Index = 0; Index < FvHandleCount; Index++) {
|
|
gBS->HandleProtocol (
|
|
FvHandleBuffer[Index],
|
|
&gEfiFirmwareVolume2ProtocolGuid,
|
|
(VOID **) &Fv
|
|
);
|
|
|
|
Status = Fv->ReadFile (
|
|
Fv,
|
|
FileGuid,
|
|
NULL,
|
|
&Size,
|
|
&Type,
|
|
&Attributes,
|
|
&AuthenticationStatus
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
//
|
|
// Skip if input Fv file not in the FV
|
|
//
|
|
continue;
|
|
}
|
|
FindFvFile = TRUE;
|
|
FoundFvHandle = FvHandleBuffer[Index];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (FindFvFile) {
|
|
//
|
|
// Build the shell device path
|
|
//
|
|
NewDevicePath = DevicePathFromHandle (FoundFvHandle);
|
|
EfiInitializeFwVolDevicepathNode (&FvFileNode, FileGuid);
|
|
NewDevicePath = AppendDevicePathNode (NewDevicePath, (EFI_DEVICE_PATH_PROTOCOL *) &FvFileNode);
|
|
*DevicePath = NewDevicePath;
|
|
return EFI_SUCCESS;
|
|
}
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
|
|
/**
|
|
Gets the data and size of a variable.
|
|
|
|
Read the EFI variable (VendorGuid/Name) and return a dynamically allocated
|
|
buffer, and the size of the buffer. If failure return NULL.
|
|
|
|
@param Name String part of EFI variable name
|
|
@param VendorGuid GUID part of EFI variable name
|
|
@param VariableSize Returns the size of the EFI variable that was
|
|
read
|
|
|
|
@return Dynamically allocated memory that contains a copy of the EFI variable.
|
|
Caller is responsible freeing the buffer.
|
|
@retval NULL Variable was not read
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
GetVariableAndSize (
|
|
IN CHAR16 *Name,
|
|
IN EFI_GUID *VendorGuid,
|
|
OUT UINTN *VariableSize
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINTN BufferSize;
|
|
VOID *Buffer;
|
|
|
|
Buffer = NULL;
|
|
|
|
//
|
|
// Pass in a zero size buffer to find the required buffer size.
|
|
//
|
|
BufferSize = 0;
|
|
Status = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);
|
|
if (Status == EFI_BUFFER_TOO_SMALL) {
|
|
//
|
|
// Allocate the buffer to return
|
|
//
|
|
Buffer = AllocateZeroPool (BufferSize);
|
|
if (Buffer == NULL) {
|
|
return NULL;
|
|
}
|
|
//
|
|
// Read variable into the allocated buffer.
|
|
//
|
|
Status = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);
|
|
if (EFI_ERROR (Status)) {
|
|
BufferSize = 0;
|
|
}
|
|
}
|
|
|
|
*VariableSize = BufferSize;
|
|
return Buffer;
|
|
}
|
|
|
|
|
|
/**
|
|
Connect to the handle to a device on the device path.
|
|
|
|
This function will create all handles associate with every device
|
|
path node. If the handle associate with one device path node can not
|
|
be created success, then still give one chance to do the dispatch,
|
|
which load the missing drivers if possible.
|
|
|
|
@param DevicePathToConnect The device path which will be connected, it can
|
|
be a multi-instance device path
|
|
|
|
@retval EFI_SUCCESS All handles associate with every device path
|
|
node have been created
|
|
@retval EFI_OUT_OF_RESOURCES There is no resource to create new handles
|
|
@retval EFI_NOT_FOUND Create the handle associate with one device
|
|
path node failed
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
ConnectDevicePath (
|
|
IN EFI_DEVICE_PATH_PROTOCOL *DevicePathToConnect
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
|
|
EFI_DEVICE_PATH_PROTOCOL *CopyOfDevicePath;
|
|
EFI_DEVICE_PATH_PROTOCOL *Instance;
|
|
EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;
|
|
EFI_DEVICE_PATH_PROTOCOL *Next;
|
|
EFI_HANDLE Handle;
|
|
EFI_HANDLE PreviousHandle;
|
|
UINTN Size;
|
|
|
|
if (DevicePathToConnect == NULL) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
DevicePath = DuplicateDevicePath (DevicePathToConnect);
|
|
CopyOfDevicePath = DevicePath;
|
|
if (DevicePath == NULL) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
do {
|
|
//
|
|
// The outer loop handles multi instance device paths.
|
|
// Only console variables contain multiple instance device paths.
|
|
//
|
|
// After this call DevicePath points to the next Instance
|
|
//
|
|
Instance = GetNextDevicePathInstance (&DevicePath, &Size);
|
|
Next = Instance;
|
|
while (!IsDevicePathEndType (Next)) {
|
|
Next = NextDevicePathNode (Next);
|
|
}
|
|
|
|
SetDevicePathEndNode (Next);
|
|
|
|
//
|
|
// Start the real work of connect with RemainingDevicePath
|
|
//
|
|
PreviousHandle = NULL;
|
|
do {
|
|
//
|
|
// Find the handle that best matches the Device Path. If it is only a
|
|
// partial match the remaining part of the device path is returned in
|
|
// RemainingDevicePath.
|
|
//
|
|
RemainingDevicePath = Instance;
|
|
Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &Handle);
|
|
|
|
if (!EFI_ERROR (Status)) {
|
|
if (Handle == PreviousHandle) {
|
|
//
|
|
// If no forward progress is made try invoking the Dispatcher.
|
|
// A new FV may have been added to the system an new drivers
|
|
// may now be found.
|
|
// Status == EFI_SUCCESS means a driver was dispatched
|
|
// Status == EFI_NOT_FOUND means no new drivers were dispatched
|
|
//
|
|
Status = gDS->Dispatch ();
|
|
}
|
|
|
|
if (!EFI_ERROR (Status)) {
|
|
PreviousHandle = Handle;
|
|
//
|
|
// Connect all drivers that apply to Handle and RemainingDevicePath,
|
|
// the Recursive flag is FALSE so only one level will be expanded.
|
|
//
|
|
// Do not check the connect status here, if the connect controller fail,
|
|
// then still give the chance to do dispatch, because partial
|
|
// RemainingDevicepath may be in the new FV
|
|
//
|
|
// 1. If the connect fails, RemainingDevicepath and handle will not
|
|
// change, so next time will do the dispatch, then dispatch's status
|
|
// will take effect
|
|
// 2. If the connect succeeds, the RemainingDevicepath and handle will
|
|
// change, then avoid the dispatch, we have chance to continue the
|
|
// next connection
|
|
//
|
|
gBS->ConnectController (Handle, NULL, RemainingDevicePath, FALSE);
|
|
}
|
|
}
|
|
//
|
|
// Loop until RemainingDevicePath is an empty device path
|
|
//
|
|
} while (!EFI_ERROR (Status) && !IsDevicePathEnd (RemainingDevicePath));
|
|
|
|
} while (DevicePath != NULL);
|
|
|
|
if (CopyOfDevicePath != NULL) {
|
|
FreePool (CopyOfDevicePath);
|
|
}
|
|
//
|
|
// All handle with DevicePath exists in the handle database
|
|
//
|
|
return Status;
|
|
}
|