camellia_aesni_avx2_glue.c

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