1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON
4 *
5 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6 */
7
8#include <crypto/internal/hash.h>
9#include <crypto/internal/simd.h>
10#include <crypto/sha2.h>
11#include <crypto/sha512_base.h>
12#include <linux/crypto.h>
13#include <linux/module.h>
14
15#include <asm/simd.h>
16#include <asm/neon.h>
17
18#include "sha512.h"
19
20MODULE_ALIAS_CRYPTO("sha384-neon");
21MODULE_ALIAS_CRYPTO("sha512-neon");
22
23asmlinkage void sha512_block_data_order_neon(struct sha512_state *state,
24					     const u8 *src, int blocks);
25
26static int sha512_neon_update(struct shash_desc *desc, const u8 *data,
27			      unsigned int len)
28{
29	struct sha512_state *sctx = shash_desc_ctx(desc);
30
31	if (!crypto_simd_usable() ||
32	    (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
33		return sha512_arm_update(desc, data, len);
34
35	kernel_neon_begin();
36	sha512_base_do_update(desc, data, len, sha512_block_data_order_neon);
37	kernel_neon_end();
38
39	return 0;
40}
41
42static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
43			     unsigned int len, u8 *out)
44{
45	if (!crypto_simd_usable())
46		return sha512_arm_finup(desc, data, len, out);
47
48	kernel_neon_begin();
49	if (len)
50		sha512_base_do_update(desc, data, len,
51				      sha512_block_data_order_neon);
52	sha512_base_do_finalize(desc, sha512_block_data_order_neon);
53	kernel_neon_end();
54
55	return sha512_base_finish(desc, out);
56}
57
58static int sha512_neon_final(struct shash_desc *desc, u8 *out)
59{
60	return sha512_neon_finup(desc, NULL, 0, out);
61}
62
63struct shash_alg sha512_neon_algs[] = { {
64	.init			= sha384_base_init,
65	.update			= sha512_neon_update,
66	.final			= sha512_neon_final,
67	.finup			= sha512_neon_finup,
68	.descsize		= sizeof(struct sha512_state),
69	.digestsize		= SHA384_DIGEST_SIZE,
70	.base			= {
71		.cra_name		= "sha384",
72		.cra_driver_name	= "sha384-neon",
73		.cra_priority		= 300,
74		.cra_blocksize		= SHA384_BLOCK_SIZE,
75		.cra_module		= THIS_MODULE,
76
77	}
78},  {
79	.init			= sha512_base_init,
80	.update			= sha512_neon_update,
81	.final			= sha512_neon_final,
82	.finup			= sha512_neon_finup,
83	.descsize		= sizeof(struct sha512_state),
84	.digestsize		= SHA512_DIGEST_SIZE,
85	.base			= {
86		.cra_name		= "sha512",
87		.cra_driver_name	= "sha512-neon",
88		.cra_priority		= 300,
89		.cra_blocksize		= SHA512_BLOCK_SIZE,
90		.cra_module		= THIS_MODULE,
91	}
92} };
93