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