LXR linux/arch/x86/crypto/camellia_aesni_avx2

   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");
 139