[deliverable/linux.git] / arch / arm / crypto / sha1_neon_glue.c

/*
 * 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>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 */

#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/cryptohash.h>
#include <linux/types.h>
#include <crypto/sha.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 (!may_use_simd() ||
	    (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 (!may_use_simd())
		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_flags		= CRYPTO_ALG_TYPE_SHASH,
		.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
60468255 JK	1	/*
	2	* Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
	3	* ARM NEON instructions.
	4	*
	5	* Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
	6	*
	7	* This file is based on sha1_generic.c and sha1_ssse3_glue.c:
	8	* Copyright (c) Alan Smithee.
	9	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	10	* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
	11	* Copyright (c) Mathias Krause <minipli@googlemail.com>
	12	* Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
	13	*
	14	* This program is free software; you can redistribute it and/or modify it
	15	* under the terms of the GNU General Public License as published by the Free
	16	* Software Foundation; either version 2 of the License, or (at your option)
	17	* any later version.
	18	*
	19	*/
	20
	21	#include <crypto/internal/hash.h>
	22	#include <linux/init.h>
	23	#include <linux/module.h>
	24	#include <linux/mm.h>
	25	#include <linux/cryptohash.h>
	26	#include <linux/types.h>
	27	#include <crypto/sha.h>
51e515fa	28	#include <crypto/sha1_base.h>
60468255 JK	29	#include <asm/neon.h>
60468255 JK	30	#include <asm/simd.h>
60468255	31
90451d6b	32	#include "sha1.h"
60468255 JK	33
	34	asmlinkage void sha1_transform_neon(void state_h, const char data,
	35	unsigned int rounds);
	36
60468255	37	static int sha1_neon_update(struct shash_desc desc, const u8 data,
51e515fa	38	unsigned int len)
60468255 JK	39	{
60468255 JK	40	struct sha1_state *sctx = shash_desc_ctx(desc);
60468255	41
51e515fa AB	42	if (!may_use_simd() \|\|
	43	(sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
	44	return sha1_update_arm(desc, data, len);
60468255	45
51e515fa AB	46	kernel_neon_begin();
	47	sha1_base_do_update(desc, data, len,
	48	(sha1_block_fn *)sha1_transform_neon);
	49	kernel_neon_end();
60468255 JK	50
	51	return 0;
	52	}
	53
51e515fa AB	54	static int sha1_neon_finup(struct shash_desc desc, const u8 data,
51e515fa AB	55	unsigned int len, u8 *out)
60468255	56	{
51e515fa AB	57	if (!may_use_simd())
51e515fa AB	58	return sha1_finup_arm(desc, data, len, out);
60468255	59
51e515fa AB	60	kernel_neon_begin();
	61	if (len)
	62	sha1_base_do_update(desc, data, len,
	63	(sha1_block_fn *)sha1_transform_neon);
	64	sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
	65	kernel_neon_end();
60468255	66
51e515fa	67	return sha1_base_finish(desc, out);
60468255 JK	68	}
60468255 JK	69
51e515fa	70	static int sha1_neon_final(struct shash_desc desc, u8 out)
60468255	71	{
51e515fa	72	return sha1_neon_finup(desc, NULL, 0, out);
60468255 JK	73	}
	74
	75	static struct shash_alg alg = {
	76	.digestsize = SHA1_DIGEST_SIZE,
51e515fa	77	.init = sha1_base_init,
60468255 JK	78	.update = sha1_neon_update,
60468255 JK	79	.final = sha1_neon_final,
51e515fa	80	.finup = sha1_neon_finup,
60468255	81	.descsize = sizeof(struct sha1_state),
60468255 JK	82	.base = {
	83	.cra_name = "sha1",
	84	.cra_driver_name = "sha1-neon",
	85	.cra_priority = 250,
	86	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	87	.cra_blocksize = SHA1_BLOCK_SIZE,
	88	.cra_module = THIS_MODULE,
	89	}
	90	};
	91
	92	static int __init sha1_neon_mod_init(void)
	93	{
	94	if (!cpu_has_neon())
	95	return -ENODEV;
	96
	97	return crypto_register_shash(&alg);
	98	}
	99
	100	static void __exit sha1_neon_mod_fini(void)
	101	{
	102	crypto_unregister_shash(&alg);
	103	}
	104
	105	module_init(sha1_neon_mod_init);
	106	module_exit(sha1_neon_mod_fini);
	107
	108	MODULE_LICENSE("GPL");
	109	MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
5d26a105	110	MODULE_ALIAS_CRYPTO("sha1");