linux/arch/x86/crypto/camellia_aesni_avx_glue.c
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   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");
 138