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");