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1/**
2 * Routines supporting VMX instructions on the Power 8
3 *
4 * Copyright (C) 2015 International Business Machines Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 only.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 *
19 * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
20 */
21
22#include <linux/module.h>
23#include <linux/moduleparam.h>
24#include <linux/types.h>
25#include <linux/err.h>
26#include <linux/cpufeature.h>
27#include <linux/crypto.h>
28#include <asm/cputable.h>
29#include <crypto/internal/hash.h>
30
31extern struct shash_alg p8_ghash_alg;
32extern struct crypto_alg p8_aes_alg;
33extern struct crypto_alg p8_aes_cbc_alg;
34extern struct crypto_alg p8_aes_ctr_alg;
35extern struct crypto_alg p8_aes_xts_alg;
36static struct crypto_alg *algs[] = {
37 &p8_aes_alg,
38 &p8_aes_cbc_alg,
39 &p8_aes_ctr_alg,
40 &p8_aes_xts_alg,
41 NULL,
42};
43
44int __init p8_init(void)
45{
46 int ret = 0;
47 struct crypto_alg **alg_it;
48
49 for (alg_it = algs; *alg_it; alg_it++) {
50 ret = crypto_register_alg(*alg_it);
51 printk(KERN_INFO "crypto_register_alg '%s' = %d\n",
52 (*alg_it)->cra_name, ret);
53 if (ret) {
54 for (alg_it--; alg_it >= algs; alg_it--)
55 crypto_unregister_alg(*alg_it);
56 break;
57 }
58 }
59 if (ret)
60 return ret;
61
62 ret = crypto_register_shash(&p8_ghash_alg);
63 if (ret) {
64 for (alg_it = algs; *alg_it; alg_it++)
65 crypto_unregister_alg(*alg_it);
66 }
67 return ret;
68}
69
70void __exit p8_exit(void)
71{
72 struct crypto_alg **alg_it;
73
74 for (alg_it = algs; *alg_it; alg_it++) {
75 printk(KERN_INFO "Removing '%s'\n", (*alg_it)->cra_name);
76 crypto_unregister_alg(*alg_it);
77 }
78 crypto_unregister_shash(&p8_ghash_alg);
79}
80
81module_cpu_feature_match(PPC_MODULE_FEATURE_VEC_CRYPTO, p8_init);
82module_exit(p8_exit);
83
84MODULE_AUTHOR("Marcelo Cerri<mhcerri@br.ibm.com>");
85MODULE_DESCRIPTION("IBM VMX cryptographic acceleration instructions "
86 "support on Power 8");
87MODULE_LICENSE("GPL");
88MODULE_VERSION("1.0.0");