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 <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 #define CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS 32 19 20 /* 32-way AVX2/AES-NI parallel cipher functions */ 21 asmlinkage void camellia_ecb_enc_32way(const void *ctx, u8 *dst, const u8 *src); 22 asmlinkage void camellia_ecb_dec_32way(const void *ctx, u8 *dst, const u8 *src); 23 24 asmlinkage void camellia_cbc_dec_32way(const void *ctx, u8 *dst, const u8 *src); 25 26 static const struct common_glue_ctx camellia_enc = { 27 .num_funcs = 4, 28 .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, 29 30 .funcs = { { 31 .num_blocks = CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, 32 .fn_u = { .ecb = camellia_ecb_enc_32way } 33 }, { 34 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, 35 .fn_u = { .ecb = camellia_ecb_enc_16way } 36 }, { 37 .num_blocks = 2, 38 .fn_u = { .ecb = camellia_enc_blk_2way } 39 }, { 40 .num_blocks = 1, 41 .fn_u = { .ecb = camellia_enc_blk } 42 } } 43 }; 44 45 static const struct common_glue_ctx camellia_dec = { 46 .num_funcs = 4, 47 .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, 48 49 .funcs = { { 50 .num_blocks = CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, 51 .fn_u = { .ecb = camellia_ecb_dec_32way } 52 }, { 53 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, 54 .fn_u = { .ecb = camellia_ecb_dec_16way } 55 }, { 56 .num_blocks = 2, 57 .fn_u = { .ecb = camellia_dec_blk_2way } 58 }, { 59 .num_blocks = 1, 60 .fn_u = { .ecb = camellia_dec_blk } 61 } } 62 }; 63 64 static const struct common_glue_ctx camellia_dec_cbc = { 65 .num_funcs = 4, 66 .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, 67 68 .funcs = { { 69 .num_blocks = CAMELLIA_AESNI_AVX2_PARALLEL_BLOCKS, 70 .fn_u = { .cbc = camellia_cbc_dec_32way } 71 }, { 72 .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, 73 .fn_u = { .cbc = camellia_cbc_dec_16way } 74 }, { 75 .num_blocks = 2, 76 .fn_u = { .cbc = camellia_decrypt_cbc_2way } 77 }, { 78 .num_blocks = 1, 79 .fn_u = { .cbc = camellia_dec_blk } 80 } } 81 }; 82 83 static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key, 84 unsigned int keylen) 85 { 86 return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen); 87 } 88 89 static int ecb_encrypt(struct skcipher_request *req) 90 { 91 return glue_ecb_req_128bit(&camellia_enc, req); 92 } 93 94 static int ecb_decrypt(struct skcipher_request *req) 95 { 96 return glue_ecb_req_128bit(&camellia_dec, req); 97 } 98 99 static int cbc_encrypt(struct skcipher_request *req) 100 { 101 return glue_cbc_encrypt_req_128bit(camellia_enc_blk, req); 102 } 103 104 static int cbc_decrypt(struct skcipher_request *req) 105 { 106 return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req); 107 } 108 109 static struct skcipher_alg camellia_algs[] = { 110 { 111 .base.cra_name = "__ecb(camellia)", 112 .base.cra_driver_name = "__ecb-camellia-aesni-avx2", 113 .base.cra_priority = 500, 114 .base.cra_flags = CRYPTO_ALG_INTERNAL, 115 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, 116 .base.cra_ctxsize = sizeof(struct camellia_ctx), 117 .base.cra_module = THIS_MODULE, 118 .min_keysize = CAMELLIA_MIN_KEY_SIZE, 119 .max_keysize = CAMELLIA_MAX_KEY_SIZE, 120 .setkey = camellia_setkey, 121 .encrypt = ecb_encrypt, 122 .decrypt = ecb_decrypt, 123 }, { 124 .base.cra_name = "__cbc(camellia)", 125 .base.cra_driver_name = "__cbc-camellia-aesni-avx2", 126 .base.cra_priority = 500, 127 .base.cra_flags = CRYPTO_ALG_INTERNAL, 128 .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, 129 .base.cra_ctxsize = sizeof(struct camellia_ctx), 130 .base.cra_module = THIS_MODULE, 131 .min_keysize = CAMELLIA_MIN_KEY_SIZE, 132 .max_keysize = CAMELLIA_MAX_KEY_SIZE, 133 .ivsize = CAMELLIA_BLOCK_SIZE, 134 .setkey = camellia_setkey, 135 .encrypt = cbc_encrypt, 136 .decrypt = cbc_decrypt, 137 }, 138 }; 139 140 static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)]; 141 142 static int __init camellia_aesni_init(void) 143 { 144 const char *feature_name; 145 146 if (!boot_cpu_has(X86_FEATURE_AVX) || 147 !boot_cpu_has(X86_FEATURE_AVX2) || 148 !boot_cpu_has(X86_FEATURE_AES) || 149 !boot_cpu_has(X86_FEATURE_OSXSAVE)) { 150 pr_info("AVX2 or AES-NI instructions are not detected.\n"); 151 return -ENODEV; 152 } 153 154 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, 155 &feature_name)) { 156 pr_info("CPU feature '%s' is not supported.\n", feature_name); 157 return -ENODEV; 158 } 159 160 return simd_register_skciphers_compat(camellia_algs, 161 ARRAY_SIZE(camellia_algs), 162 camellia_simd_algs); 163 } 164 165 static void __exit camellia_aesni_fini(void) 166 { 167 simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs), 168 camellia_simd_algs); 169 } 170 171 module_init(camellia_aesni_init); 172 module_exit(camellia_aesni_fini); 173 174 MODULE_LICENSE("GPL"); 175 MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX2 optimized"); 176 MODULE_ALIAS_CRYPTO("camellia"); 177 MODULE_ALIAS_CRYPTO("camellia-asm"); 178