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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SHA-256 Secure Hash Algorithm.
*
* Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
*
* Based on crypto/sha256_generic.c, which is:
*
* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
*/
#include <asm/octeon/octeon.h>
#include <crypto/internal/sha2.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "octeon-crypto.h"
/*
* We pass everything as 64-bit. OCTEON can handle misaligned data.
*/
void sha256_blocks_arch(u32 state[SHA256_STATE_WORDS],
const u8 *data, size_t nblocks)
{
struct octeon_cop2_state cop2_state;
u64 *state64 = (u64 *)state;
unsigned long flags;
if (!octeon_has_crypto())
return sha256_blocks_generic(state, data, nblocks);
flags = octeon_crypto_enable(&cop2_state);
write_octeon_64bit_hash_dword(state64[0], 0);
write_octeon_64bit_hash_dword(state64[1], 1);
write_octeon_64bit_hash_dword(state64[2], 2);
write_octeon_64bit_hash_dword(state64[3], 3);
do {
const u64 *block = (const u64 *)data;
write_octeon_64bit_block_dword(block[0], 0);
write_octeon_64bit_block_dword(block[1], 1);
write_octeon_64bit_block_dword(block[2], 2);
write_octeon_64bit_block_dword(block[3], 3);
write_octeon_64bit_block_dword(block[4], 4);
write_octeon_64bit_block_dword(block[5], 5);
write_octeon_64bit_block_dword(block[6], 6);
octeon_sha256_start(block[7]);
data += SHA256_BLOCK_SIZE;
} while (--nblocks);
state64[0] = read_octeon_64bit_hash_dword(0);
state64[1] = read_octeon_64bit_hash_dword(1);
state64[2] = read_octeon_64bit_hash_dword(2);
state64[3] = read_octeon_64bit_hash_dword(3);
octeon_crypto_disable(&cop2_state, flags);
}
EXPORT_SYMBOL_GPL(sha256_blocks_arch);
bool sha256_is_arch_optimized(void)
{
return octeon_has_crypto();
}
EXPORT_SYMBOL_GPL(sha256_is_arch_optimized);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA-256 Secure Hash Algorithm (OCTEON)");
MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
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