diff options
Diffstat (limited to 'src/interface/efi/efi_service.c')
| -rw-r--r-- | src/interface/efi/efi_service.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/interface/efi/efi_service.c b/src/interface/efi/efi_service.c new file mode 100644 index 00000000..d4129c0d --- /dev/null +++ b/src/interface/efi/efi_service.c @@ -0,0 +1,138 @@ +/* + * Copyright (C) 2024 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +/** @file + * + * EFI service binding + * + */ + +#include <string.h> +#include <errno.h> +#include <ipxe/efi/efi.h> +#include <ipxe/efi/efi_service.h> +#include <ipxe/efi/Protocol/ServiceBinding.h> + +/** + * Add service to child handle + * + * @v service Service binding handle + * @v binding Service binding protocol GUID + * @v handle Handle on which to install child + * @ret rc Return status code + */ +int efi_service_add ( EFI_HANDLE service, EFI_GUID *binding, + EFI_HANDLE *handle ) { + EFI_BOOT_SERVICES *bs = efi_systab->BootServices; + union { + EFI_SERVICE_BINDING_PROTOCOL *sb; + void *interface; + } u; + EFI_STATUS efirc; + int rc; + + /* Open service binding protocol */ + if ( ( efirc = bs->OpenProtocol ( service, binding, &u.interface, + efi_image_handle, service, + EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){ + rc = -EEFI ( efirc ); + DBGC ( service, "EFISVC %s cannot open %s binding: %s\n", + efi_handle_name ( service ), efi_guid_ntoa ( binding ), + strerror ( rc ) ); + goto err_open; + } + + /* Create child handle */ + if ( ( efirc = u.sb->CreateChild ( u.sb, handle ) ) != 0 ) { + rc = -EEFI ( efirc ); + DBGC ( service, "EFISVC %s could not create %s child: %s\n", + efi_handle_name ( service ), efi_guid_ntoa ( binding ), + strerror ( rc ) ); + goto err_create; + } + + /* Success */ + rc = 0; + DBGC ( service, "EFISVC %s created %s child ", + efi_handle_name ( service ), efi_guid_ntoa ( binding ) ); + DBGC ( service, "%s\n", efi_handle_name ( *handle ) ); + + err_create: + bs->CloseProtocol ( service, binding, efi_image_handle, service ); + err_open: + return rc; +} + +/** + * Remove service from child handle + * + * @v service Service binding handle + * @v binding Service binding protocol GUID + * @v handle Child handle + * @ret rc Return status code + */ +int efi_service_del ( EFI_HANDLE service, EFI_GUID *binding, + EFI_HANDLE handle ) { + EFI_BOOT_SERVICES *bs = efi_systab->BootServices; + union { + EFI_SERVICE_BINDING_PROTOCOL *sb; + void *interface; + } u; + EFI_STATUS efirc; + int rc; + + DBGC ( service, "EFISVC %s removing %s child ", + efi_handle_name ( service ), efi_guid_ntoa ( binding ) ); + DBGC ( service, "%s\n", efi_handle_name ( handle ) ); + + /* Open service binding protocol */ + if ( ( efirc = bs->OpenProtocol ( service, binding, &u.interface, + efi_image_handle, service, + EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){ + rc = -EEFI ( efirc ); + DBGC ( service, "EFISVC %s cannot open %s binding: %s\n", + efi_handle_name ( service ), efi_guid_ntoa ( binding ), + strerror ( rc ) ); + goto err_open; + } + + /* Destroy child handle */ + if ( ( efirc = u.sb->DestroyChild ( u.sb, handle ) ) != 0 ) { + rc = -EEFI ( efirc ); + DBGC ( service, "EFISVC %s could not destroy %s child ", + efi_handle_name ( service ), efi_guid_ntoa ( binding ) ); + DBGC ( service, "%s: %s\n", + efi_handle_name ( handle ), strerror ( rc ) ); + goto err_destroy; + } + + /* Success */ + rc = 0; + + err_destroy: + bs->CloseProtocol ( service, binding, efi_image_handle, service ); + err_open: + return rc; +} |