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 <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
 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_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",
 87		.base.cra_priority	= 400,
 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_AES) ||
109	    !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
110		pr_info("AVX or AES-NI instructions are not detected.\n");
111		return -ENODEV;
112	}
113
114	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
115				&feature_name)) {
116		pr_info("CPU feature '%s' is not supported.\n", feature_name);
117		return -ENODEV;
118	}
119
120	return simd_register_skciphers_compat(camellia_algs,
121					      ARRAY_SIZE(camellia_algs),
122					      camellia_simd_algs);
123}
124
125static void __exit camellia_aesni_fini(void)
126{
127	simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
128				  camellia_simd_algs);
129}
130
131module_init(camellia_aesni_init);
132module_exit(camellia_aesni_fini);
133
134MODULE_LICENSE("GPL");
135MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
136MODULE_ALIAS_CRYPTO("camellia");
137MODULE_ALIAS_CRYPTO("camellia-asm");