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 <asm/crypto/camellia.h>
   9 #include <asm/crypto/glue_helper.h>
  10 #include <crypto/algapi.h>
  11 #include <crypto/internal/simd.h>
  12 #include <linux/crypto.h>
  13 #include <linux/err.h>
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16
  17 #define CAMELLIA_AESNI_PARALLEL_BLOCKS 16
  18
  19 /* 16-way parallel cipher functions (avx/aes-ni) */
  20 asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
  21 EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
  22
  23 asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
  24 EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
  25
  26 asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
  27 EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
  28
  29 asmlinkage void camellia_ctr_16way(const void *ctx, u8 *dst, const u8 *src,
  30                                    le128 *iv);
  31 EXPORT_SYMBOL_GPL(camellia_ctr_16way);
  32
  33 static const struct common_glue_ctx camellia_enc = {
  34         .num_funcs = 3,
  35         .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  36
  37         .funcs = { {
  38                 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  39                 .fn_u = { .ecb = camellia_ecb_enc_16way }
  40         }, {
  41                 .num_blocks = 2,
  42                 .fn_u = { .ecb = camellia_enc_blk_2way }
  43         }, {
  44                 .num_blocks = 1,
  45                 .fn_u = { .ecb = camellia_enc_blk }
  46         } }
  47 };
  48
  49 static const struct common_glue_ctx camellia_ctr = {
  50         .num_funcs = 3,
  51         .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  52
  53         .funcs = { {
  54                 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  55                 .fn_u = { .ctr = camellia_ctr_16way }
  56         }, {
  57                 .num_blocks = 2,
  58                 .fn_u = { .ctr = camellia_crypt_ctr_2way }
  59         }, {
  60                 .num_blocks = 1,
  61                 .fn_u = { .ctr = camellia_crypt_ctr }
  62         } }
  63 };
  64
  65 static const struct common_glue_ctx camellia_dec = {
  66         .num_funcs = 3,
  67         .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  68
  69         .funcs = { {
  70                 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  71                 .fn_u = { .ecb = camellia_ecb_dec_16way }
  72         }, {
  73                 .num_blocks = 2,
  74                 .fn_u = { .ecb = camellia_dec_blk_2way }
  75         }, {
  76                 .num_blocks = 1,
  77                 .fn_u = { .ecb = camellia_dec_blk }
  78         } }
  79 };
  80
  81 static const struct common_glue_ctx camellia_dec_cbc = {
  82         .num_funcs = 3,
  83         .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  84
  85         .funcs = { {
  86                 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
  87                 .fn_u = { .cbc = camellia_cbc_dec_16way }
  88         }, {
  89                 .num_blocks = 2,
  90                 .fn_u = { .cbc = camellia_decrypt_cbc_2way }
  91         }, {
  92                 .num_blocks = 1,
  93                 .fn_u = { .cbc = camellia_dec_blk }
  94         } }
  95 };
  96
  97 static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
  98                            unsigned int keylen)
  99 {
 100         return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
 101 }
 102
 103 static int ecb_encrypt(struct skcipher_request *req)
 104 {
 105         return glue_ecb_req_128bit(&camellia_enc, req);
 106 }
 107
 108 static int ecb_decrypt(struct skcipher_request *req)
 109 {
 110         return glue_ecb_req_128bit(&camellia_dec, req);
 111 }
 112
 113 static int cbc_encrypt(struct skcipher_request *req)
 114 {
 115         return glue_cbc_encrypt_req_128bit(camellia_enc_blk, req);
 116 }
 117
 118 static int cbc_decrypt(struct skcipher_request *req)
 119 {
 120         return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req);
 121 }
 122
 123 static int ctr_crypt(struct skcipher_request *req)
 124 {
 125         return glue_ctr_req_128bit(&camellia_ctr, req);
 126 }
 127
 128 static struct skcipher_alg camellia_algs[] = {
 129         {
 130                 .base.cra_name          = "__ecb(camellia)",
 131                 .base.cra_driver_name   = "__ecb-camellia-aesni",
 132                 .base.cra_priority      = 400,
 133                 .base.cra_flags         = CRYPTO_ALG_INTERNAL,
 134                 .base.cra_blocksize     = CAMELLIA_BLOCK_SIZE,
 135                 .base.cra_ctxsize       = sizeof(struct camellia_ctx),
 136                 .base.cra_module        = THIS_MODULE,
 137                 .min_keysize            = CAMELLIA_MIN_KEY_SIZE,
 138                 .max_keysize            = CAMELLIA_MAX_KEY_SIZE,
 139                 .setkey                 = camellia_setkey,
 140                 .encrypt                = ecb_encrypt,
 141                 .decrypt                = ecb_decrypt,
 142         }, {
 143                 .base.cra_name          = "__cbc(camellia)",
 144                 .base.cra_driver_name   = "__cbc-camellia-aesni",
 145                 .base.cra_priority      = 400,
 146                 .base.cra_flags         = CRYPTO_ALG_INTERNAL,
 147                 .base.cra_blocksize     = CAMELLIA_BLOCK_SIZE,
 148                 .base.cra_ctxsize       = sizeof(struct camellia_ctx),
 149                 .base.cra_module        = THIS_MODULE,
 150                 .min_keysize            = CAMELLIA_MIN_KEY_SIZE,
 151                 .max_keysize            = CAMELLIA_MAX_KEY_SIZE,
 152                 .ivsize                 = CAMELLIA_BLOCK_SIZE,
 153                 .setkey                 = camellia_setkey,
 154                 .encrypt                = cbc_encrypt,
 155                 .decrypt                = cbc_decrypt,
 156         }, {
 157                 .base.cra_name          = "__ctr(camellia)",
 158                 .base.cra_driver_name   = "__ctr-camellia-aesni",
 159                 .base.cra_priority      = 400,
 160                 .base.cra_flags         = CRYPTO_ALG_INTERNAL,
 161                 .base.cra_blocksize     = 1,
 162                 .base.cra_ctxsize       = sizeof(struct camellia_ctx),
 163                 .base.cra_module        = THIS_MODULE,
 164                 .min_keysize            = CAMELLIA_MIN_KEY_SIZE,
 165                 .max_keysize            = CAMELLIA_MAX_KEY_SIZE,
 166                 .ivsize                 = CAMELLIA_BLOCK_SIZE,
 167                 .chunksize              = CAMELLIA_BLOCK_SIZE,
 168                 .setkey                 = camellia_setkey,
 169                 .encrypt                = ctr_crypt,
 170                 .decrypt                = ctr_crypt,
 171         }
 172 };
 173
 174 static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];
 175
 176 static int __init camellia_aesni_init(void)
 177 {
 178         const char *feature_name;
 179
 180         if (!boot_cpu_has(X86_FEATURE_AVX) ||
 181             !boot_cpu_has(X86_FEATURE_AES) ||
 182             !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
 183                 pr_info("AVX or AES-NI instructions are not detected.\n");
 184                 return -ENODEV;
 185         }
 186
 187         if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
 188                                 &feature_name)) {
 189                 pr_info("CPU feature '%s' is not supported.\n", feature_name);
 190                 return -ENODEV;
 191         }
 192
 193         return simd_register_skciphers_compat(camellia_algs,
 194                                               ARRAY_SIZE(camellia_algs),
 195                                               camellia_simd_algs);
 196 }
 197
 198 static void __exit camellia_aesni_fini(void)
 199 {
 200         simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
 201                                   camellia_simd_algs);
 202 }
 203
 204 module_init(camellia_aesni_init);
 205 module_exit(camellia_aesni_fini);
 206
 207 MODULE_LICENSE("GPL");
 208 MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
 209 MODULE_ALIAS_CRYPTO("camellia");
 210 MODULE_ALIAS_CRYPTO("camellia-asm");