// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* BLAKE2b digest algorithm, NEON accelerated
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*
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* Copyright 2020 Google LLC
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*/
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#include <crypto/internal/blake2b.h>
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#include <crypto/internal/hash.h>
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#include <crypto/internal/simd.h>
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#include <linux/module.h>
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#include <linux/sizes.h>
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#include <asm/neon.h>
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#include <asm/simd.h>
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asmlinkage void blake2b_compress_neon(struct blake2b_state *state,
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const u8 *block, size_t nblocks, u32 inc);
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static void blake2b_compress_arch(struct blake2b_state *state,
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const u8 *block, size_t nblocks, u32 inc)
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{
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if (!crypto_simd_usable()) {
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blake2b_compress_generic(state, block, nblocks, inc);
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return;
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}
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do {
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const size_t blocks = min_t(size_t, nblocks,
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SZ_4K / BLAKE2B_BLOCK_SIZE);
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kernel_neon_begin();
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blake2b_compress_neon(state, block, blocks, inc);
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kernel_neon_end();
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nblocks -= blocks;
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block += blocks * BLAKE2B_BLOCK_SIZE;
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} while (nblocks);
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}
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static int crypto_blake2b_update_neon(struct shash_desc *desc,
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const u8 *in, unsigned int inlen)
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{
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return crypto_blake2b_update(desc, in, inlen, blake2b_compress_arch);
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}
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static int crypto_blake2b_final_neon(struct shash_desc *desc, u8 *out)
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{
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return crypto_blake2b_final(desc, out, blake2b_compress_arch);
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}
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#define BLAKE2B_ALG(name, driver_name, digest_size) \
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{ \
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.base.cra_name = name, \
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.base.cra_driver_name = driver_name, \
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.base.cra_priority = 200, \
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
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.base.cra_blocksize = BLAKE2B_BLOCK_SIZE, \
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.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx), \
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.base.cra_module = THIS_MODULE, \
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.digestsize = digest_size, \
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.setkey = crypto_blake2b_setkey, \
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.init = crypto_blake2b_init, \
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.update = crypto_blake2b_update_neon, \
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.final = crypto_blake2b_final_neon, \
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.descsize = sizeof(struct blake2b_state), \
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}
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static struct shash_alg blake2b_neon_algs[] = {
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BLAKE2B_ALG("blake2b-160", "blake2b-160-neon", BLAKE2B_160_HASH_SIZE),
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BLAKE2B_ALG("blake2b-256", "blake2b-256-neon", BLAKE2B_256_HASH_SIZE),
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BLAKE2B_ALG("blake2b-384", "blake2b-384-neon", BLAKE2B_384_HASH_SIZE),
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BLAKE2B_ALG("blake2b-512", "blake2b-512-neon", BLAKE2B_512_HASH_SIZE),
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};
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static int __init blake2b_neon_mod_init(void)
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{
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if (!(elf_hwcap & HWCAP_NEON))
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return -ENODEV;
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return crypto_register_shashes(blake2b_neon_algs,
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ARRAY_SIZE(blake2b_neon_algs));
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}
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static void __exit blake2b_neon_mod_exit(void)
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{
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crypto_unregister_shashes(blake2b_neon_algs,
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ARRAY_SIZE(blake2b_neon_algs));
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}
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module_init(blake2b_neon_mod_init);
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module_exit(blake2b_neon_mod_exit);
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MODULE_DESCRIPTION("BLAKE2b digest algorithm, NEON accelerated");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>");
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MODULE_ALIAS_CRYPTO("blake2b-160");
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MODULE_ALIAS_CRYPTO("blake2b-160-neon");
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MODULE_ALIAS_CRYPTO("blake2b-256");
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MODULE_ALIAS_CRYPTO("blake2b-256-neon");
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MODULE_ALIAS_CRYPTO("blake2b-384");
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MODULE_ALIAS_CRYPTO("blake2b-384-neon");
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MODULE_ALIAS_CRYPTO("blake2b-512");
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MODULE_ALIAS_CRYPTO("blake2b-512-neon");
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