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/sha.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(u64 *state, u8 const *src,
24					     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,
37		(sha512_block_fn *)sha512_block_data_order_neon);
38	kernel_neon_end();
39
40	return 0;
41}
42
43static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
44			     unsigned int len, u8 *out)
45{
46	if (!crypto_simd_usable())
47		return sha512_arm_finup(desc, data, len, out);
48
49	kernel_neon_begin();
50	if (len)
51		sha512_base_do_update(desc, data, len,
52			(sha512_block_fn *)sha512_block_data_order_neon);
53	sha512_base_do_finalize(desc,
54		(sha512_block_fn *)sha512_block_data_order_neon);
55	kernel_neon_end();
56
57	return sha512_base_finish(desc, out);
58}
59
60static int sha512_neon_final(struct shash_desc *desc, u8 *out)
61{
62	return sha512_neon_finup(desc, NULL, 0, out);
63}
64
65struct shash_alg sha512_neon_algs[] = { {
66	.init			= sha384_base_init,
67	.update			= sha512_neon_update,
68	.final			= sha512_neon_final,
69	.finup			= sha512_neon_finup,
70	.descsize		= sizeof(struct sha512_state),
71	.digestsize		= SHA384_DIGEST_SIZE,
72	.base			= {
73		.cra_name		= "sha384",
74		.cra_driver_name	= "sha384-neon",
75		.cra_priority		= 300,
76		.cra_blocksize		= SHA384_BLOCK_SIZE,
77		.cra_module		= THIS_MODULE,
78
79	}
80},  {
81	.init			= sha512_base_init,
82	.update			= sha512_neon_update,
83	.final			= sha512_neon_final,
84	.finup			= sha512_neon_finup,
85	.descsize		= sizeof(struct sha512_state),
86	.digestsize		= SHA512_DIGEST_SIZE,
87	.base			= {
88		.cra_name		= "sha512",
89		.cra_driver_name	= "sha512-neon",
90		.cra_priority		= 300,
91		.cra_blocksize		= SHA512_BLOCK_SIZE,
92		.cra_module		= THIS_MODULE,
93	}
94} };
95