module/icp/include/modes/gcm_impl.h

   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 https://opensource.org/licenses/CDDL-1.0.
  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
  33 extern "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  */
  45 typedef void            (*gcm_mul_f)(uint64_t *, uint64_t *, uint64_t *);
  46 typedef boolean_t       (*gcm_will_work_f)(void);
  47
  48 #define GCM_IMPL_NAME_MAX (16)
  49
  50 typedef 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
  56 extern const gcm_impl_ops_t gcm_generic_impl;
  57 #if defined(__x86_64) && defined(HAVE_PCLMULQDQ)
  58 extern const gcm_impl_ops_t gcm_pclmulqdq_impl;
  59 #endif
  60
  61 /*
  62  * Initializes fastest implementation
  63  */
  64 void gcm_impl_init(void);
  65
  66 /*
  67  * Returns optimal allowed GCM implementation
  68  */
  69 const struct gcm_impl_ops *gcm_impl_get_ops(void);
  70
  71 #ifdef  __cplusplus
  72 }
  73 #endif
  74
  75 #endif  /* _GCM_IMPL_H */