arch/x86/crypto/camellia_aesni_avx2_glue.c

   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 */
  22 asmlinkage void camellia_ecb_enc_32way(const void *ctx, u8 *dst, const u8 *src);
  23 asmlinkage void camellia_ecb_dec_32way(const void *ctx, u8 *dst, const u8 *src);
  24
  25 asmlinkage void camellia_cbc_dec_32way(const void *ctx, u8 *dst, const u8 *src);
  26
  27 static 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
  33 static 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
  43 static 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
  53 static 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
  60 static 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
  70 static 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
 101 static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];
 102
 103 static 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
 126 static void __exit camellia_aesni_fini(void)
 127 {
 128         simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
 129                                   camellia_simd_algs);
 130 }
 131
 132 module_init(camellia_aesni_init);
 133 module_exit(camellia_aesni_fini);
 134
 135 MODULE_LICENSE("GPL");
 136 MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX2 optimized");
 137 MODULE_ALIAS_CRYPTO("camellia");
 138 MODULE_ALIAS_CRYPTO("camellia-asm");