camellia_aesni_avx_glue.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia
  4 *
  5 * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
  6 */
  7
  8#include <crypto/algapi.h>
  9#include <linux/crypto.h>
 10#include <linux/err.h>
 11#include <linux/export.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
 20/* 16-way parallel cipher functions (avx/aes-ni) */
 21asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
 22EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
 23
 24asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
 25EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
 26
 27asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
 28EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
 29
 30static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
 31			   unsigned int keylen)
 32{
 33	return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
 34}
 35
 36static int ecb_encrypt(struct skcipher_request *req)
 37{
 38	ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
 39	ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_enc_16way);
 40	ECB_BLOCK(2, camellia_enc_blk_2way);
 41	ECB_BLOCK(1, camellia_enc_blk);
 42	ECB_WALK_END();
 43}
 44
 45static int ecb_decrypt(struct skcipher_request *req)
 46{
 47	ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
 48	ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_dec_16way);
 49	ECB_BLOCK(2, camellia_dec_blk_2way);
 50	ECB_BLOCK(1, camellia_dec_blk);
 51	ECB_WALK_END();
 52}
 53
 54static int cbc_encrypt(struct skcipher_request *req)
 55{
 56	CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, -1);
 57	CBC_ENC_BLOCK(camellia_enc_blk);
 58	CBC_WALK_END();
 59}
 60
 61static int cbc_decrypt(struct skcipher_request *req)
 62{
 63	CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
 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",
 74		.base.cra_priority	= 400,
 75		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
 76		.base.cra_ctxsize	= sizeof(struct camellia_ctx),
 77		.base.cra_module	= THIS_MODULE,
 78		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
 79		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
 80		.setkey			= camellia_setkey,
 81		.encrypt		= ecb_encrypt,
 82		.decrypt		= ecb_decrypt,
 83	}, {
 84		.base.cra_name		= "cbc(camellia)",
 85		.base.cra_driver_name	= "cbc-camellia-aesni",
 86		.base.cra_priority	= 400,
 87		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
 88		.base.cra_ctxsize	= sizeof(struct camellia_ctx),
 89		.base.cra_module	= THIS_MODULE,
 90		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
 91		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
 92		.ivsize			= CAMELLIA_BLOCK_SIZE,
 93		.setkey			= camellia_setkey,
 94		.encrypt		= cbc_encrypt,
 95		.decrypt		= cbc_decrypt,
 96	}
 97};
 98
 99static int __init camellia_aesni_init(void)
100{
101	const char *feature_name;
102
103	if (!boot_cpu_has(X86_FEATURE_AVX) ||
104	    !boot_cpu_has(X86_FEATURE_AES) ||
105	    !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
106		pr_info("AVX 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/AVX optimized");
130MODULE_ALIAS_CRYPTO("camellia");
131MODULE_ALIAS_CRYPTO("camellia-asm");