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Add two useful functions in UefiLib for the implementation of Component Name, Driver Config, and Driver Diag protocols.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2267 6f19259b-4bc3-4df7-8a09-765794883524
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qhuang8
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@ -1,7 +1,7 @@
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/** @file
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MDE UEFI library functions and macros
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Copyright (c) 2006, Intel Corporation
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Copyright (c) 2006 - 2007, 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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@ -233,6 +233,63 @@ EfiReleaseLock (
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IN EFI_LOCK *Lock
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);
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/**
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Tests whether a controller is managed by a specific driver.
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This function tests whether a specific driver manages ControllerHandle by
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opening on DriverBindingHandle a protocol specified by ProtocolGuid with
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attribute EFI_OPEN_PROTOCOL_BY_DRIVER. This library function is used to
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implement the Component Name Protocol for EFI Drivers.
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If ProtocolGuid is NULL, then ASSERT().
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@param ControllerHandle A handle for a controller to test.
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@param DriverBindingHandle Specifies the driver binding handle for the
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driver.
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@param ProtocolGuid Supplies GUID for the protocol opened by the
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driver on the controller.
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@retval EFI_SUCCESS ControllerHandle is managed by the specific
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driver.
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@retval EFI_UNSUPPORTED ControllerHandle is not managed by the specific
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driver.
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**/
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EFI_STATUS
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EFIAPI
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EfiTestManagedDevice (
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IN CONST EFI_HANDLE ControllerHandle,
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IN CONST EFI_HANDLE DriverBindingHandle,
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IN CONST EFI_GUID *ProtocolGuid
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);
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/**
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Tests whether a child handle is a children device of the controller.
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This function tests whether ChildHandle is one of the children of
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ControllerHandle which are consuming a protocol specified by ProtocolGuid
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with the attribute bit EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER set. This
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library function is used to implement the Component Name Protocol for EFI
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Drivers.
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If ProtocolGuid is NULL, then ASSERT().
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@param ControllerHandle A handle for a (parent) controller to test.
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@param ChildHandle A child handle to test.
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@param ConsumsedGuid Supplies GUID for the protocol consumed by
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children from controller.
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@retval EFI_SUCCESS ChildHandle is a child of the ControllerHandle.
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@retval EFI_UNSUPPORTED ChildHandle is not a child of the
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ControllerHandle.
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**/
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EFI_STATUS
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EFIAPI
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EfiTestChildHandle (
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IN CONST EFI_HANDLE ControllerHandle,
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IN CONST EFI_HANDLE ChildHandle,
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IN CONST EFI_GUID *ProtocolGuid
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);
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/**
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This function looks up a Unicode string in UnicodeStringTable. If Language is
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a member of SupportedLanguages and a Unicode string is found in UnicodeStringTable
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@ -1,7 +1,7 @@
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/** @file
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Mde UEFI library functions.
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Copyright (c) 2006, Intel Corporation<BR>
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Copyright (c) 2006 - 2007, Intel Corporation<BR>
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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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@ -347,6 +347,130 @@ EfiReleaseLock (
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gBS->RestoreTPL (Tpl);
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}
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/**
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Tests whether a controller is managed by a specific driver.
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This function tests whether a specific driver manages ControllerHandle by
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opening on DriverBindingHandle a protocol specified by ProtocolGuid with
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attribute EFI_OPEN_PROTOCOL_BY_DRIVER. This library function is used to
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implement the Component Name Protocol for EFI Drivers.
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If ProtocolGuid is NULL, then ASSERT().
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@param ControllerHandle A handle for a controller to test.
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@param DriverBindingHandle Specifies the driver binding handle for the
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driver.
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@param ProtocolGuid Supplies GUID for the protocol opened by the
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driver on the controller.
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@retval EFI_SUCCESS ControllerHandle is managed by the specific
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driver.
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@retval EFI_UNSUPPORTED ControllerHandle is not managed by the specific
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driver.
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**/
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EFI_STATUS
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EFIAPI
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EfiTestManagedDevice (
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IN CONST EFI_HANDLE ControllerHandle,
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IN CONST EFI_HANDLE DriverBindingHandle,
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IN CONST EFI_GUID *ProtocolGuid
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)
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{
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EFI_STATUS Status;
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VOID *ManagedInterface;
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ASSERT (ProtocolGuid != NULL);
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Status = gBS->OpenProtocol (
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ControllerHandle,
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(EFI_GUID *) ProtocolGuid,
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&ManagedInterface,
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DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (!EFI_ERROR (Status)) {
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gBS->CloseProtocol (
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ControllerHandle,
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(EFI_GUID *) ProtocolGuid,
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DriverBindingHandle,
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ControllerHandle
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);
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return EFI_UNSUPPORTED;
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}
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if (Status != EFI_ALREADY_STARTED) {
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return EFI_UNSUPPORTED;
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}
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return EFI_SUCCESS;
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}
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/**
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Tests whether a child handle is a children device of the controller.
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This function tests whether ChildHandle is one of the children of
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ControllerHandle which are consuming a protocol specified by ProtocolGuid
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with the attribute bit EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER set. This
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library function is used to implement the Component Name Protocol for EFI
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Drivers.
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If ProtocolGuid is NULL, then ASSERT().
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@param ControllerHandle A handle for a (parent) controller to test.
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@param ChildHandle A child handle to test.
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@param ConsumsedGuid Supplies GUID for the protocol consumed by
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children from controller.
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@retval EFI_SUCCESS ChildHandle is a child of the ControllerHandle.
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@retval EFI_UNSUPPORTED ChildHandle is not a child of the
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ControllerHandle.
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**/
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EFI_STATUS
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EFIAPI
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EfiTestChildHandle (
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IN CONST EFI_HANDLE ControllerHandle,
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IN CONST EFI_HANDLE ChildHandle,
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IN CONST EFI_GUID *ProtocolGuid
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)
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{
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EFI_STATUS Status;
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EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;
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UINTN EntryCount;
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UINTN Index;
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ASSERT (ProtocolGuid != NULL);
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//
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// Retrieve the list of agents that are consuming the specific protocol
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// on ControllerHandle.
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//
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Status = gBS->OpenProtocolInformation (
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ControllerHandle,
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(EFI_GUID *) ProtocolGuid,
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&OpenInfoBuffer,
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&EntryCount
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);
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if (EFI_ERROR (Status)) {
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return EFI_UNSUPPORTED;
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}
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//
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// Inspect if ChildHandle is one of the agents.
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//
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Status = EFI_UNSUPPORTED;
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for (Index = 0; Index < EntryCount; Index++) {
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if ((OpenInfoBuffer[Index].ControllerHandle == ChildHandle) &&
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(OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {
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Status = EFI_SUCCESS;
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break;
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}
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}
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FreePool (OpenInfoBuffer);
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return Status;
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}
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/**
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This function looks up a Unicode string in UnicodeStringTable. If Language is
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a member of SupportedLanguages and a Unicode string is found in UnicodeStringTable
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