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/*
* sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON
*
* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <crypto/sha512_base.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <asm/simd.h>
#include <asm/neon.h>
#include "sha512.h"
MODULE_ALIAS_CRYPTO("sha384-neon");
MODULE_ALIAS_CRYPTO("sha512-neon");
asmlinkage void sha512_block_data_order_neon(u64 *state, u8 const *src,
int blocks);
static int sha512_neon_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha512_state *sctx = shash_desc_ctx(desc);
if (!may_use_simd() ||
(sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
return sha512_arm_update(desc, data, len);
kernel_neon_begin();
sha512_base_do_update(desc, data, len,
(sha512_block_fn *)sha512_block_data_order_neon);
kernel_neon_end();
return 0;
}
static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out)
{
if (!may_use_simd())
return sha512_arm_finup(desc, data, len, out);
kernel_neon_begin();
if (len)
sha512_base_do_update(desc, data, len,
(sha512_block_fn *)sha512_block_data_order_neon);
sha512_base_do_finalize(desc,
(sha512_block_fn *)sha512_block_data_order_neon);
kernel_neon_end();
return sha512_base_finish(desc, out);
}
static int sha512_neon_final(struct shash_desc *desc, u8 *out)
{
return sha512_neon_finup(desc, NULL, 0, out);
}
struct shash_alg sha512_neon_algs[] = { {
.init = sha384_base_init,
.update = sha512_neon_update,
.final = sha512_neon_final,
.finup = sha512_neon_finup,
.descsize = sizeof(struct sha512_state),
.digestsize = SHA384_DIGEST_SIZE,
.base = {
.cra_name = "sha384",
.cra_driver_name = "sha384-neon",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA384_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
}, {
.init = sha512_base_init,
.update = sha512_neon_update,
.final = sha512_neon_final,
.finup = sha512_neon_finup,
.descsize = sizeof(struct sha512_state),
.digestsize = SHA512_DIGEST_SIZE,
.base = {
.cra_name = "sha512",
.cra_driver_name = "sha512-neon",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA512_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
} };
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