/*
 * Cryptographic API.
 *
 * MD5 Message Digest Algorithm (RFC1321).
 *
 * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
 *
 * Based on crypto/md5.c, which is:
 *
 * Derived from cryptoapi implementation, originally based on the
 * public domain implementation written by Colin Plumb in 1993.
 *
 * Copyright (c) Cryptoapi developers.
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 *
 * 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 <asm/octeon/crypto.h>
#include <asm/octeon/octeon.h>

/*
 * We pass everything as 64-bit. OCTEON can handle misaligned data.
 */

static void md5_blocks(struct md5_block_state *state,
                       const u8 *data, size_t nblocks)
{
        struct octeon_cop2_state cop2_state;
        u64 *state64 = (u64 *)state;
        unsigned long flags;

        if (!octeon_has_crypto())
                return md5_blocks_generic(state, data, nblocks);

        cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));

        flags = octeon_crypto_enable(&cop2_state);
        write_octeon_64bit_hash_dword(state64[0], 0);
        write_octeon_64bit_hash_dword(state64[1], 1);

        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_md5_start(block[7]);

                data += MD5_BLOCK_SIZE;
        } while (--nblocks);

        state64[0] = read_octeon_64bit_hash_dword(0);
        state64[1] = read_octeon_64bit_hash_dword(1);
        octeon_crypto_disable(&cop2_state, flags);

        le32_to_cpu_array(state->h, ARRAY_SIZE(state->h));
}