diff options
Diffstat (limited to 'arch/x86/crypto/camellia_aesni_avx_glue.c')
| -rw-r--r-- | arch/x86/crypto/camellia_aesni_avx_glue.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/arch/x86/crypto/camellia_aesni_avx_glue.c b/arch/x86/crypto/camellia_aesni_avx_glue.c new file mode 100644 index 000000000..c7ccf63e7 --- /dev/null +++ b/arch/x86/crypto/camellia_aesni_avx_glue.c @@ -0,0 +1,137 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia + * + * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> + */ + +#include <crypto/algapi.h> +#include <crypto/internal/simd.h> +#include <linux/crypto.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/types.h> + +#include "camellia.h" +#include "ecb_cbc_helpers.h" + +#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16 + +/* 16-way parallel cipher functions (avx/aes-ni) */ +asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src); +EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way); + +asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src); +EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way); + +asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src); +EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way); + +static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen) +{ + return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen); +} + +static int ecb_encrypt(struct skcipher_request *req) +{ + ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS); + ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_enc_16way); + ECB_BLOCK(2, camellia_enc_blk_2way); + ECB_BLOCK(1, camellia_enc_blk); + ECB_WALK_END(); +} + +static int ecb_decrypt(struct skcipher_request *req) +{ + ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS); + ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_dec_16way); + ECB_BLOCK(2, camellia_dec_blk_2way); + ECB_BLOCK(1, camellia_dec_blk); + ECB_WALK_END(); +} + +static int cbc_encrypt(struct skcipher_request *req) +{ + CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, -1); + CBC_ENC_BLOCK(camellia_enc_blk); + CBC_WALK_END(); +} + +static int cbc_decrypt(struct skcipher_request *req) +{ + CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS); + CBC_DEC_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_cbc_dec_16way); + CBC_DEC_BLOCK(2, camellia_decrypt_cbc_2way); + CBC_DEC_BLOCK(1, camellia_dec_blk); + CBC_WALK_END(); +} + +static struct skcipher_alg camellia_algs[] = { + { + .base.cra_name = "__ecb(camellia)", + .base.cra_driver_name = "__ecb-camellia-aesni", + .base.cra_priority = 400, + .base.cra_flags = CRYPTO_ALG_INTERNAL, + .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, + .base.cra_ctxsize = sizeof(struct camellia_ctx), + .base.cra_module = THIS_MODULE, + .min_keysize = CAMELLIA_MIN_KEY_SIZE, + .max_keysize = CAMELLIA_MAX_KEY_SIZE, + .setkey = camellia_setkey, + .encrypt = ecb_encrypt, + .decrypt = ecb_decrypt, + }, { + .base.cra_name = "__cbc(camellia)", + .base.cra_driver_name = "__cbc-camellia-aesni", + .base.cra_priority = 400, + .base.cra_flags = CRYPTO_ALG_INTERNAL, + .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, + .base.cra_ctxsize = sizeof(struct camellia_ctx), + .base.cra_module = THIS_MODULE, + .min_keysize = CAMELLIA_MIN_KEY_SIZE, + .max_keysize = CAMELLIA_MAX_KEY_SIZE, + .ivsize = CAMELLIA_BLOCK_SIZE, + .setkey = camellia_setkey, + .encrypt = cbc_encrypt, + .decrypt = cbc_decrypt, + } +}; + +static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)]; + +static int __init camellia_aesni_init(void) +{ + const char *feature_name; + + if (!boot_cpu_has(X86_FEATURE_AVX) || + !boot_cpu_has(X86_FEATURE_AES) || + !boot_cpu_has(X86_FEATURE_OSXSAVE)) { + pr_info("AVX or AES-NI instructions are not detected.\n"); + return -ENODEV; + } + + if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, + &feature_name)) { + pr_info("CPU feature '%s' is not supported.\n", feature_name); + return -ENODEV; + } + + return simd_register_skciphers_compat(camellia_algs, + ARRAY_SIZE(camellia_algs), + camellia_simd_algs); +} + +static void __exit camellia_aesni_fini(void) +{ + simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs), + camellia_simd_algs); +} + +module_init(camellia_aesni_init); +module_exit(camellia_aesni_fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized"); +MODULE_ALIAS_CRYPTO("camellia"); +MODULE_ALIAS_CRYPTO("camellia-asm"); |