arch/x86/crypto/camellia_aesni_avx_glue.c

   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) */
  21 asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
  22 EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
  23
  24 asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
  25 EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
  26
  27 asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
  28 EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
  29
  30 static 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
  36 static 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
  45 static 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
  54 static 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
  61 static 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
  70 static 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
 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_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
 125 static void __exit camellia_aesni_fini(void)
 126 {
 127         simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
 128                                   camellia_simd_algs);
 129 }
 130
 131 module_init(camellia_aesni_init);
 132 module_exit(camellia_aesni_fini);
 133
 134 MODULE_LICENSE("GPL");
 135 MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
 136 MODULE_ALIAS_CRYPTO("camellia");
 137 MODULE_ALIAS_CRYPTO("camellia-asm");