/** @file This is service binding for Hash driver. Copyright (c) 2015, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License that accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php. THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/ #include "Driver.h" EFI_SERVICE_BINDING_PROTOCOL mHash2ServiceBindingProtocol = { Hash2ServiceBindingCreateChild, Hash2ServiceBindingDestroyChild }; /** Creates a child handle with a set of I/O services. @param[in] This Protocol instance pointer. @param[in, out] ChildHandle Pointer to the handle of the child to create. If it is NULL, then a new handle is created. If it is not NULL, then the I/O services are added to the existing child handle. @retval EFI_SUCCES The protocol was added to ChildHandle. @retval EFI_INVALID_PARAMETER ChildHandle is NULL. @retval EFI_OUT_OF_RESOURCES There are not enough resources availabe to create the child. @retval Others The child handle was not created. **/ EFI_STATUS EFIAPI Hash2ServiceBindingCreateChild ( IN EFI_SERVICE_BINDING_PROTOCOL *This, IN OUT EFI_HANDLE *ChildHandle ) { EFI_STATUS Status; HASH2_SERVICE_DATA *Hash2ServiceData; HASH2_INSTANCE_DATA *Instance; EFI_TPL OldTpl; if ((This == NULL) || (ChildHandle == NULL)) { return EFI_INVALID_PARAMETER; } Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This); // // Allocate buffer for the new instance. // Instance = AllocateZeroPool (sizeof (HASH2_INSTANCE_DATA)); if (Instance == NULL) { return EFI_OUT_OF_RESOURCES; } // // Init the instance data. // Instance->Signature = HASH2_INSTANCE_DATA_SIGNATURE; CopyMem (&Instance->Hash2Protocol, &mHash2Protocol, sizeof (Instance->Hash2Protocol)); Instance->Hash2ServiceData = Hash2ServiceData; Status = gBS->InstallMultipleProtocolInterfaces ( ChildHandle, &gEfiHash2ProtocolGuid, &Instance->Hash2Protocol, NULL ); if (EFI_ERROR (Status)) { FreePool (Instance); return Status; } Instance->Handle = *ChildHandle; // // Add the child instance into ChildrenList. // OldTpl = gBS->RaiseTPL (TPL_CALLBACK); InsertTailList (&Hash2ServiceData->ChildrenList, &Instance->InstEntry); gBS->RestoreTPL (OldTpl); return Status; } /** Destroys a child handle with a set of I/O services. The DestroyChild() function does the opposite of CreateChild(). It removes a protocol that was installed by CreateChild() from ChildHandle. If the removed protocol is the last protocol on ChildHandle, then ChildHandle is destroyed. @param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance. @param[in] ChildHandle Handle of the child to destroy. @retval EFI_SUCCES The protocol was removed from ChildHandle. @retval EFI_UNSUPPORTED ChildHandle does not support the protocol that is being removed. @retval EFI_INVALID_PARAMETER ChildHandle is NULL. @retval EFI_ACCESS_DENIED The protocol could not be removed from the ChildHandle because its services are being used. @retval Others The child handle was not destroyed. **/ EFI_STATUS EFIAPI Hash2ServiceBindingDestroyChild ( IN EFI_SERVICE_BINDING_PROTOCOL *This, IN EFI_HANDLE ChildHandle ) { EFI_STATUS Status; HASH2_SERVICE_DATA *Hash2ServiceData; EFI_HASH2_PROTOCOL *Hash2Protocol; HASH2_INSTANCE_DATA *Instance; EFI_TPL OldTpl; LIST_ENTRY *Entry; if ((This == NULL) || (ChildHandle == NULL)) { return EFI_INVALID_PARAMETER; } Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This); // // Check if this ChildHandle is valid // Instance = NULL; for(Entry = (&Hash2ServiceData->ChildrenList)->ForwardLink; Entry != (&Hash2ServiceData->ChildrenList); Entry = Entry->ForwardLink) { Instance = HASH2_INSTANCE_DATA_FROM_LINK (Entry); if (Instance->Handle == ChildHandle) { break; } else { Instance = NULL; } } if (Instance == NULL) { DEBUG ((EFI_D_ERROR, "Hash2ServiceBindingDestroyChild - Invalid handle\n")); return EFI_UNSUPPORTED; } // // Get HashProtocol // Status = gBS->HandleProtocol ( ChildHandle, &gEfiHash2ProtocolGuid, (VOID **)&Hash2Protocol ); if (EFI_ERROR (Status)) { return Status; } ASSERT (Hash2Protocol == &Instance->Hash2Protocol); // // Uninstall the Hash protocol. // Status = gBS->UninstallMultipleProtocolInterfaces ( ChildHandle, &gEfiHash2ProtocolGuid, &Instance->Hash2Protocol, NULL ); if (EFI_ERROR (Status)) { return Status; } OldTpl = gBS->RaiseTPL (TPL_CALLBACK); // // Remove this instance from the ChildrenList. // RemoveEntryList (&Instance->InstEntry); gBS->RestoreTPL (OldTpl); FreePool (Instance); return Status; } /** The entry point for Hash driver which installs the service binding protocol. @param[in] ImageHandle The image handle of the driver. @param[in] SystemTable The system table. @retval EFI_SUCCES The service binding protocols is successfully installed. @retval Others Other errors as indicated. **/ EFI_STATUS EFIAPI Hash2DriverEntryPoint ( IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable ) { EFI_STATUS Status; HASH2_SERVICE_DATA *Hash2ServiceData; // // Initialize the Hash Service Data. // Hash2ServiceData = AllocateZeroPool (sizeof (HASH2_SERVICE_DATA)); if (Hash2ServiceData == NULL) { return EFI_OUT_OF_RESOURCES; } Hash2ServiceData->Signature = HASH2_SERVICE_DATA_SIGNATURE; CopyMem (&Hash2ServiceData->ServiceBinding, &mHash2ServiceBindingProtocol, sizeof (EFI_SERVICE_BINDING_PROTOCOL)); InitializeListHead (&Hash2ServiceData->ChildrenList); // // Install the HASH Service Binding Protocol // Status = gBS->InstallMultipleProtocolInterfaces ( &Hash2ServiceData->ServiceHandle, &gEfiHash2ServiceBindingProtocolGuid, &Hash2ServiceData->ServiceBinding, NULL ); if (EFI_ERROR (Status)) { FreePool (Hash2ServiceData); } return Status; }