[linux-block.git] / arch / arm / crypto / sha1_neon_glue.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
 * ARM NEON instructions.
 *
 * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
 *
 * This file is based on sha1_generic.c and sha1_ssse3_glue.c:
 *  Copyright (c) Alan Smithee.
 *  Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
 *  Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
 *  Copyright (c) Mathias Krause <minipli@googlemail.com>
 *  Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
 */

#include <crypto/internal/hash.h>
#include <crypto/internal/simd.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sha1.h>
#include <crypto/sha1_base.h>
#include <asm/neon.h>
#include <asm/simd.h>

#include "sha1.h"

asmlinkage void sha1_transform_neon(void *state_h, const char *data,
				    unsigned int rounds);

static int sha1_neon_update(struct shash_desc *desc, const u8 *data,
			  unsigned int len)
{
	struct sha1_state *sctx = shash_desc_ctx(desc);

	if (!crypto_simd_usable() ||
	    (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
		return sha1_update_arm(desc, data, len);

	kernel_neon_begin();
	sha1_base_do_update(desc, data, len,
			    (sha1_block_fn *)sha1_transform_neon);
	kernel_neon_end();

	return 0;
}

static int sha1_neon_finup(struct shash_desc *desc, const u8 *data,
			   unsigned int len, u8 *out)
{
	if (!crypto_simd_usable())
		return sha1_finup_arm(desc, data, len, out);

	kernel_neon_begin();
	if (len)
		sha1_base_do_update(desc, data, len,
				    (sha1_block_fn *)sha1_transform_neon);
	sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
	kernel_neon_end();

	return sha1_base_finish(desc, out);
}

static int sha1_neon_final(struct shash_desc *desc, u8 *out)
{
	return sha1_neon_finup(desc, NULL, 0, out);
}

static struct shash_alg alg = {
	.digestsize	=	SHA1_DIGEST_SIZE,
	.init		=	sha1_base_init,
	.update		=	sha1_neon_update,
	.final		=	sha1_neon_final,
	.finup		=	sha1_neon_finup,
	.descsize	=	sizeof(struct sha1_state),
	.base		=	{
		.cra_name		= "sha1",
		.cra_driver_name	= "sha1-neon",
		.cra_priority		= 250,
		.cra_blocksize		= SHA1_BLOCK_SIZE,
		.cra_module		= THIS_MODULE,
	}
};

static int __init sha1_neon_mod_init(void)
{
	if (!cpu_has_neon())
		return -ENODEV;

	return crypto_register_shash(&alg);
}

static void __exit sha1_neon_mod_fini(void)
{
	crypto_unregister_shash(&alg);
}

module_init(sha1_neon_mod_init);
module_exit(sha1_neon_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
MODULE_ALIAS_CRYPTO("sha1");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
60468255 JK	2	/*
	3	* Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
	4	* ARM NEON instructions.
	5	*
	6	* Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
	7	*
	8	* This file is based on sha1_generic.c and sha1_ssse3_glue.c:
	9	* Copyright (c) Alan Smithee.
	10	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	11	* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
	12	* Copyright (c) Mathias Krause <minipli@googlemail.com>
	13	* Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
60468255 JK	14	*/
	15
	16	#include <crypto/internal/hash.h>
99680c5e	17	#include <crypto/internal/simd.h>
60468255 JK	18	#include <linux/init.h>
	19	#include <linux/module.h>
	20	#include <linux/mm.h>
60468255	21	#include <linux/types.h>
a24d22b2	22	#include <crypto/sha1.h>
51e515fa	23	#include <crypto/sha1_base.h>
60468255 JK	24	#include <asm/neon.h>
60468255 JK	25	#include <asm/simd.h>
60468255	26
90451d6b	27	#include "sha1.h"
60468255 JK	28
	29	asmlinkage void sha1_transform_neon(void state_h, const char data,
	30	unsigned int rounds);
	31
60468255	32	static int sha1_neon_update(struct shash_desc desc, const u8 data,
51e515fa	33	unsigned int len)
60468255 JK	34	{
60468255 JK	35	struct sha1_state *sctx = shash_desc_ctx(desc);
60468255	36
99680c5e	37	if (!crypto_simd_usable() \|\|
51e515fa AB	38	(sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
51e515fa AB	39	return sha1_update_arm(desc, data, len);
60468255	40
51e515fa AB	41	kernel_neon_begin();
	42	sha1_base_do_update(desc, data, len,
	43	(sha1_block_fn *)sha1_transform_neon);
	44	kernel_neon_end();
60468255 JK	45
	46	return 0;
	47	}
	48
51e515fa AB	49	static int sha1_neon_finup(struct shash_desc desc, const u8 data,
51e515fa AB	50	unsigned int len, u8 *out)
60468255	51	{
99680c5e	52	if (!crypto_simd_usable())
51e515fa	53	return sha1_finup_arm(desc, data, len, out);
60468255	54
51e515fa AB	55	kernel_neon_begin();
	56	if (len)
	57	sha1_base_do_update(desc, data, len,
	58	(sha1_block_fn *)sha1_transform_neon);
	59	sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
	60	kernel_neon_end();
60468255	61
51e515fa	62	return sha1_base_finish(desc, out);
60468255 JK	63	}
60468255 JK	64
51e515fa	65	static int sha1_neon_final(struct shash_desc desc, u8 out)
60468255	66	{
51e515fa	67	return sha1_neon_finup(desc, NULL, 0, out);
60468255 JK	68	}
	69
	70	static struct shash_alg alg = {
	71	.digestsize = SHA1_DIGEST_SIZE,
51e515fa	72	.init = sha1_base_init,
60468255 JK	73	.update = sha1_neon_update,
60468255 JK	74	.final = sha1_neon_final,
51e515fa	75	.finup = sha1_neon_finup,
60468255	76	.descsize = sizeof(struct sha1_state),
60468255 JK	77	.base = {
	78	.cra_name = "sha1",
	79	.cra_driver_name = "sha1-neon",
	80	.cra_priority = 250,
60468255 JK	81	.cra_blocksize = SHA1_BLOCK_SIZE,
	82	.cra_module = THIS_MODULE,
	83	}
	84	};
	85
	86	static int __init sha1_neon_mod_init(void)
	87	{
	88	if (!cpu_has_neon())
	89	return -ENODEV;
	90
	91	return crypto_register_shash(&alg);
	92	}
	93
	94	static void __exit sha1_neon_mod_fini(void)
	95	{
	96	crypto_unregister_shash(&alg);
	97	}
	98
	99	module_init(sha1_neon_mod_init);
	100	module_exit(sha1_neon_mod_fini);
	101
	102	MODULE_LICENSE("GPL");
	103	MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
5d26a105	104	MODULE_ALIAS_CRYPTO("sha1");