[linux-block.git] / arch / arm / crypto / sha256_neon_glue.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Glue code for the SHA256 Secure Hash Algorithm assembly implementation
 * using NEON instructions.
 *
 * Copyright © 2015 Google Inc.
 *
 * This file is based on sha512_neon_glue.c:
 *   Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
 */

#include <crypto/internal/hash.h>
#include <crypto/internal/simd.h>
#include <linux/types.h>
#include <linux/string.h>
#include <crypto/sha2.h>
#include <crypto/sha256_base.h>
#include <asm/byteorder.h>
#include <asm/simd.h>
#include <asm/neon.h>

#include "sha256_glue.h"

asmlinkage void sha256_block_data_order_neon(struct sha256_state *digest,
					     const u8 *data, int num_blks);

static int crypto_sha256_neon_update(struct shash_desc *desc, const u8 *data,
				     unsigned int len)
{
	struct sha256_state *sctx = shash_desc_ctx(desc);

	if (!crypto_simd_usable() ||
	    (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
		return crypto_sha256_arm_update(desc, data, len);

	kernel_neon_begin();
	sha256_base_do_update(desc, data, len, sha256_block_data_order_neon);
	kernel_neon_end();

	return 0;
}

static int crypto_sha256_neon_finup(struct shash_desc *desc, const u8 *data,
				    unsigned int len, u8 *out)
{
	if (!crypto_simd_usable())
		return crypto_sha256_arm_finup(desc, data, len, out);

	kernel_neon_begin();
	if (len)
		sha256_base_do_update(desc, data, len,
				      sha256_block_data_order_neon);
	sha256_base_do_finalize(desc, sha256_block_data_order_neon);
	kernel_neon_end();

	return sha256_base_finish(desc, out);
}

static int crypto_sha256_neon_final(struct shash_desc *desc, u8 *out)
{
	return crypto_sha256_neon_finup(desc, NULL, 0, out);
}

struct shash_alg sha256_neon_algs[] = { {
	.digestsize	=	SHA256_DIGEST_SIZE,
	.init		=	sha256_base_init,
	.update		=	crypto_sha256_neon_update,
	.final		=	crypto_sha256_neon_final,
	.finup		=	crypto_sha256_neon_finup,
	.descsize	=	sizeof(struct sha256_state),
	.base		=	{
		.cra_name	=	"sha256",
		.cra_driver_name =	"sha256-neon",
		.cra_priority	=	250,
		.cra_blocksize	=	SHA256_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
}, {
	.digestsize	=	SHA224_DIGEST_SIZE,
	.init		=	sha224_base_init,
	.update		=	crypto_sha256_neon_update,
	.final		=	crypto_sha256_neon_final,
	.finup		=	crypto_sha256_neon_finup,
	.descsize	=	sizeof(struct sha256_state),
	.base		=	{
		.cra_name	=	"sha224",
		.cra_driver_name =	"sha224-neon",
		.cra_priority	=	250,
		.cra_blocksize	=	SHA224_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
} };
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
f2f770d7 ST	2	/*
	3	* Glue code for the SHA256 Secure Hash Algorithm assembly implementation
	4	* using NEON instructions.
	5	*
3723c632	6	* Copyright © 2015 Google Inc.
f2f770d7 ST	7	*
f2f770d7 ST	8	* This file is based on sha512_neon_glue.c:
3723c632	9	* Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
f2f770d7 ST	10	*/
	11
	12	#include <crypto/internal/hash.h>
99680c5e	13	#include <crypto/internal/simd.h>
f2f770d7 ST	14	#include <linux/types.h>
f2f770d7 ST	15	#include <linux/string.h>
a24d22b2	16	#include <crypto/sha2.h>
b59e2ae3	17	#include <crypto/sha256_base.h>
f2f770d7 ST	18	#include <asm/byteorder.h>
	19	#include <asm/simd.h>
	20	#include <asm/neon.h>
b59e2ae3	21
f2f770d7 ST	22	#include "sha256_glue.h"
f2f770d7 ST	23
547ea1b1 HX	24	asmlinkage void sha256_block_data_order_neon(struct sha256_state *digest,
547ea1b1 HX	25	const u8 *data, int num_blks);
f2f770d7	26
e4dcc1be HG	27	static int crypto_sha256_neon_update(struct shash_desc desc, const u8 data,
e4dcc1be HG	28	unsigned int len)
f2f770d7 ST	29	{
f2f770d7 ST	30	struct sha256_state *sctx = shash_desc_ctx(desc);
f2f770d7	31
99680c5e	32	if (!crypto_simd_usable() \|\|
b59e2ae3 AB	33	(sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
b59e2ae3 AB	34	return crypto_sha256_arm_update(desc, data, len);
f2f770d7	35
b59e2ae3	36	kernel_neon_begin();
547ea1b1	37	sha256_base_do_update(desc, data, len, sha256_block_data_order_neon);
b59e2ae3	38	kernel_neon_end();
f2f770d7 ST	39
	40	return 0;
	41	}
	42
e4dcc1be HG	43	static int crypto_sha256_neon_finup(struct shash_desc desc, const u8 data,
e4dcc1be HG	44	unsigned int len, u8 *out)
f2f770d7	45	{
99680c5e	46	if (!crypto_simd_usable())
b59e2ae3 AB	47	return crypto_sha256_arm_finup(desc, data, len, out);
	48
	49	kernel_neon_begin();
	50	if (len)
	51	sha256_base_do_update(desc, data, len,
547ea1b1 HX	52	sha256_block_data_order_neon);
547ea1b1 HX	53	sha256_base_do_finalize(desc, sha256_block_data_order_neon);
b59e2ae3 AB	54	kernel_neon_end();
	55
	56	return sha256_base_finish(desc, out);
f2f770d7 ST	57	}
f2f770d7 ST	58
e4dcc1be	59	static int crypto_sha256_neon_final(struct shash_desc desc, u8 out)
f2f770d7	60	{
e4dcc1be	61	return crypto_sha256_neon_finup(desc, NULL, 0, out);
f2f770d7 ST	62	}
	63
	64	struct shash_alg sha256_neon_algs[] = { {
	65	.digestsize = SHA256_DIGEST_SIZE,
b59e2ae3	66	.init = sha256_base_init,
e4dcc1be HG	67	.update = crypto_sha256_neon_update,
	68	.final = crypto_sha256_neon_final,
	69	.finup = crypto_sha256_neon_finup,
f2f770d7	70	.descsize = sizeof(struct sha256_state),
f2f770d7 ST	71	.base = {
	72	.cra_name = "sha256",
	73	.cra_driver_name = "sha256-neon",
	74	.cra_priority = 250,
f2f770d7 ST	75	.cra_blocksize = SHA256_BLOCK_SIZE,
	76	.cra_module = THIS_MODULE,
	77	}
	78	}, {
	79	.digestsize = SHA224_DIGEST_SIZE,
b59e2ae3	80	.init = sha224_base_init,
e4dcc1be HG	81	.update = crypto_sha256_neon_update,
	82	.final = crypto_sha256_neon_final,
	83	.finup = crypto_sha256_neon_finup,
f2f770d7	84	.descsize = sizeof(struct sha256_state),
f2f770d7 ST	85	.base = {
	86	.cra_name = "sha224",
	87	.cra_driver_name = "sha224-neon",
	88	.cra_priority = 250,
f2f770d7 ST	89	.cra_blocksize = SHA224_BLOCK_SIZE,
	90	.cra_module = THIS_MODULE,
	91	}
	92	} };