mirror of https://github.com/ipxe/ipxe.git
[efi] Add helper functions for service binding protocols
The EFI service binding abstraction is used to add and remove child handles for multiple different protocols. Provide a common interface for doing so. Signed-off-by: Michael Brown <mcb30@ipxe.org>pull/1130/merge
Michael Brown
parent
a15ce00182
commit
ca483a196c
|
|
@ -0,0 +1,90 @@
|
|||
/** @file
|
||||
UEFI Service Binding Protocol is defined in UEFI specification.
|
||||
|
||||
The file defines the generic Service Binding Protocol functions.
|
||||
It provides services that are required to create and destroy child
|
||||
handles that support a given set of protocols.
|
||||
|
||||
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
|
||||
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||||
|
||||
**/
|
||||
|
||||
#ifndef __EFI_SERVICE_BINDING_H__
|
||||
#define __EFI_SERVICE_BINDING_H__
|
||||
|
||||
FILE_LICENCE ( BSD2_PATENT );
|
||||
|
||||
///
|
||||
/// Forward reference for pure ANSI compatability
|
||||
///
|
||||
typedef struct _EFI_SERVICE_BINDING_PROTOCOL EFI_SERVICE_BINDING_PROTOCOL;
|
||||
|
||||
/**
|
||||
Creates a child handle and installs a protocol.
|
||||
|
||||
The CreateChild() function installs a protocol on ChildHandle.
|
||||
If ChildHandle is a pointer to NULL, then a new handle is created and returned in ChildHandle.
|
||||
If ChildHandle is not a pointer to NULL, then the protocol installs on the existing ChildHandle.
|
||||
|
||||
@param This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
|
||||
@param ChildHandle Pointer to the handle of the child to create. If it is NULL,
|
||||
then a new handle is created. If it is a pointer to an existing UEFI handle,
|
||||
then the protocol is added to the existing UEFI 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 available to create
|
||||
the child
|
||||
@retval other The child handle was not created
|
||||
|
||||
**/
|
||||
typedef
|
||||
EFI_STATUS
|
||||
(EFIAPI *EFI_SERVICE_BINDING_CREATE_CHILD)(
|
||||
IN EFI_SERVICE_BINDING_PROTOCOL *This,
|
||||
IN OUT EFI_HANDLE *ChildHandle
|
||||
);
|
||||
|
||||
/**
|
||||
Destroys a child handle with a protocol installed on it.
|
||||
|
||||
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 This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
|
||||
@param 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 Child handle is NULL.
|
||||
@retval EFI_ACCESS_DENIED The protocol could not be removed from the ChildHandle
|
||||
because its services are being used.
|
||||
@retval other The child handle was not destroyed
|
||||
|
||||
**/
|
||||
typedef
|
||||
EFI_STATUS
|
||||
(EFIAPI *EFI_SERVICE_BINDING_DESTROY_CHILD)(
|
||||
IN EFI_SERVICE_BINDING_PROTOCOL *This,
|
||||
IN EFI_HANDLE ChildHandle
|
||||
);
|
||||
|
||||
///
|
||||
/// The EFI_SERVICE_BINDING_PROTOCOL provides member functions to create and destroy
|
||||
/// child handles. A driver is responsible for adding protocols to the child handle
|
||||
/// in CreateChild() and removing protocols in DestroyChild(). It is also required
|
||||
/// that the CreateChild() function opens the parent protocol BY_CHILD_CONTROLLER
|
||||
/// to establish the parent-child relationship, and closes the protocol in DestroyChild().
|
||||
/// The pseudo code for CreateChild() and DestroyChild() is provided to specify the
|
||||
/// required behavior, not to specify the required implementation. Each consumer of
|
||||
/// a software protocol is responsible for calling CreateChild() when it requires the
|
||||
/// protocol and calling DestroyChild() when it is finished with that protocol.
|
||||
///
|
||||
struct _EFI_SERVICE_BINDING_PROTOCOL {
|
||||
EFI_SERVICE_BINDING_CREATE_CHILD CreateChild;
|
||||
EFI_SERVICE_BINDING_DESTROY_CHILD DestroyChild;
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
#ifndef _IPXE_EFI_SERVICE_H
|
||||
#define _IPXE_EFI_SERVICE_H
|
||||
|
||||
/** @file
|
||||
*
|
||||
* EFI service binding
|
||||
*
|
||||
*/
|
||||
|
||||
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
||||
|
||||
#include <ipxe/efi/efi.h>
|
||||
|
||||
extern int efi_service_add ( EFI_HANDLE service, EFI_GUID *binding,
|
||||
EFI_HANDLE *handle );
|
||||
extern int efi_service_del ( EFI_HANDLE service, EFI_GUID *binding,
|
||||
EFI_HANDLE handle );
|
||||
|
||||
#endif /* _IPXE_EFI_SERVICE_H */
|
||||
|
|
@ -82,6 +82,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|||
#define ERRFILE_uuid ( ERRFILE_CORE | 0x002a0000 )
|
||||
#define ERRFILE_efi_path ( ERRFILE_CORE | 0x002b0000 )
|
||||
#define ERRFILE_efi_mp ( ERRFILE_CORE | 0x002c0000 )
|
||||
#define ERRFILE_efi_service ( ERRFILE_CORE | 0x002d0000 )
|
||||
|
||||
#define ERRFILE_eisa ( ERRFILE_DRIVER | 0x00000000 )
|
||||
#define ERRFILE_isa ( ERRFILE_DRIVER | 0x00010000 )
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
}
|
||||
Loading…
Reference in New Issue