1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25#ifndef	_GCM_IMPL_H
26#define	_GCM_IMPL_H
27
28/*
29 * GCM function dispatcher.
30 */
31
32#ifdef	__cplusplus
33extern "C" {
34#endif
35
36#include <sys/zfs_context.h>
37#include <sys/crypto/common.h>
38
39/*
40 * Methods used to define GCM implementation
41 *
42 * @gcm_mul_f Perform carry-less multiplication
43 * @gcm_will_work_f Function tests whether implementation will function
44 */
45typedef void		(*gcm_mul_f)(uint64_t *, uint64_t *, uint64_t *);
46typedef boolean_t	(*gcm_will_work_f)(void);
47
48#define	GCM_IMPL_NAME_MAX (16)
49
50typedef struct gcm_impl_ops {
51	gcm_mul_f mul;
52	gcm_will_work_f is_supported;
53	char name[GCM_IMPL_NAME_MAX];
54} gcm_impl_ops_t;
55
56extern const gcm_impl_ops_t gcm_generic_impl;
57#if defined(__x86_64) && defined(HAVE_PCLMULQDQ)
58extern const gcm_impl_ops_t gcm_pclmulqdq_impl;
59#endif
60
61/*
62 * Initializes fastest implementation
63 */
64void gcm_impl_init(void);
65
66/*
67 * Returns optimal allowed GCM implementation
68 */
69const struct gcm_impl_ops *gcm_impl_get_ops(void);
70
71#ifdef	__cplusplus
72}
73#endif
74
75#endif	/* _GCM_IMPL_H */
76