1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Glue Code for x86_64/AVX2/AES-NI assembler optimized version of Camellia
4 *
5 * Copyright �� 2013 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
6 */
7
8#include <crypto/algapi.h>
9#include <crypto/internal/simd.h>
10#include <linux/crypto.h>
11#include <linux/err.h>
12#include <linux/module.h>
13#include <linux/types.h>
14
15#include "camellia.h"
16#include "ecb_cbc_helpers.h"
17
18#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16
19#define CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS 32
20
21/* 32-way AVX2/AES-NI parallel cipher functions */
22asmlinkage void camellia_ecb_enc_32way(const void *ctx, u8 *dst, const u8 *src);
23asmlinkage void camellia_ecb_dec_32way(const void *ctx, u8 *dst, const u8 *src);
24
25asmlinkage void camellia_cbc_dec_32way(const void *ctx, u8 *dst, const u8 *src);
26
27static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
28			   unsigned int keylen)
29{
30	return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
31}
32
33static int ecb_encrypt(struct skcipher_request *req)
34{
35	ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
36	ECB_BLOCK(CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, camellia_ecb_enc_32way);
37	ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_enc_16way);
38	ECB_BLOCK(2, camellia_enc_blk_2way);
39	ECB_BLOCK(1, camellia_enc_blk);
40	ECB_WALK_END();
41}
42
43static int ecb_decrypt(struct skcipher_request *req)
44{
45	ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
46	ECB_BLOCK(CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, camellia_ecb_dec_32way);
47	ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_dec_16way);
48	ECB_BLOCK(2, camellia_dec_blk_2way);
49	ECB_BLOCK(1, camellia_dec_blk);
50	ECB_WALK_END();
51}
52
53static int cbc_encrypt(struct skcipher_request *req)
54{
55	CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, -1);
56	CBC_ENC_BLOCK(camellia_enc_blk);
57	CBC_WALK_END();
58}
59
60static int cbc_decrypt(struct skcipher_request *req)
61{
62	CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
63	CBC_DEC_BLOCK(CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, camellia_cbc_dec_32way);
64	CBC_DEC_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_cbc_dec_16way);
65	CBC_DEC_BLOCK(2, camellia_decrypt_cbc_2way);
66	CBC_DEC_BLOCK(1, camellia_dec_blk);
67	CBC_WALK_END();
68}
69
70static struct skcipher_alg camellia_algs[] = {
71	{
72		.base.cra_name		= "__ecb(camellia)",
73		.base.cra_driver_name	= "__ecb-camellia-aesni-avx2",
74		.base.cra_priority	= 500,
75		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
76		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
77		.base.cra_ctxsize	= sizeof(struct camellia_ctx),
78		.base.cra_module	= THIS_MODULE,
79		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
80		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
81		.setkey			= camellia_setkey,
82		.encrypt		= ecb_encrypt,
83		.decrypt		= ecb_decrypt,
84	}, {
85		.base.cra_name		= "__cbc(camellia)",
86		.base.cra_driver_name	= "__cbc-camellia-aesni-avx2",
87		.base.cra_priority	= 500,
88		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
89		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
90		.base.cra_ctxsize	= sizeof(struct camellia_ctx),
91		.base.cra_module	= THIS_MODULE,
92		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
93		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
94		.ivsize			= CAMELLIA_BLOCK_SIZE,
95		.setkey			= camellia_setkey,
96		.encrypt		= cbc_encrypt,
97		.decrypt		= cbc_decrypt,
98	},
99};
100
101static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];
102
103static int __init camellia_aesni_init(void)
104{
105	const char *feature_name;
106
107	if (!boot_cpu_has(X86_FEATURE_AVX) ||
108	    !boot_cpu_has(X86_FEATURE_AVX2) ||
109	    !boot_cpu_has(X86_FEATURE_AES) ||
110	    !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
111		pr_info("AVX2 or AES-NI instructions are not detected.\n");
112		return -ENODEV;
113	}
114
115	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
116				&feature_name)) {
117		pr_info("CPU feature '%s' is not supported.\n", feature_name);
118		return -ENODEV;
119	}
120
121	return simd_register_skciphers_compat(camellia_algs,
122					      ARRAY_SIZE(camellia_algs),
123					      camellia_simd_algs);
124}
125
126static void __exit camellia_aesni_fini(void)
127{
128	simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
129				  camellia_simd_algs);
130}
131
132module_init(camellia_aesni_init);
133module_exit(camellia_aesni_fini);
134
135MODULE_LICENSE("GPL");
136MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX2 optimized");
137MODULE_ALIAS_CRYPTO("camellia");
138MODULE_ALIAS_CRYPTO("camellia-asm");
139