md5.h

 1/*
 2 * Cryptographic API.
 3 *
 4 * MD5 Message Digest Algorithm (RFC1321).
 5 *
 6 * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
 7 *
 8 * Based on crypto/md5.c, which is:
 9 *
10 * Derived from cryptoapi implementation, originally based on the
11 * public domain implementation written by Colin Plumb in 1993.
12 *
13 * Copyright (c) Cryptoapi developers.
14 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
15 *
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the Free
18 * Software Foundation; either version 2 of the License, or (at your option)
19 * any later version.
20 */
21
22#include <asm/octeon/crypto.h>
23#include <asm/octeon/octeon.h>
24
25/*
26 * We pass everything as 64-bit. OCTEON can handle misaligned data.
27 */
28
29static void md5_blocks(struct md5_block_state *state,
30		       const u8 *data, size_t nblocks)
31{
32	struct octeon_cop2_state cop2_state;
33	u64 *state64 = (u64 *)state;
34	unsigned long flags;
35
36	if (!octeon_has_crypto())
37		return md5_blocks_generic(state, data, nblocks);
38
39	cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
40
41	flags = octeon_crypto_enable(&cop2_state);
42	write_octeon_64bit_hash_dword(state64[0], 0);
43	write_octeon_64bit_hash_dword(state64[1], 1);
44
45	do {
46		const u64 *block = (const u64 *)data;
47
48		write_octeon_64bit_block_dword(block[0], 0);
49		write_octeon_64bit_block_dword(block[1], 1);
50		write_octeon_64bit_block_dword(block[2], 2);
51		write_octeon_64bit_block_dword(block[3], 3);
52		write_octeon_64bit_block_dword(block[4], 4);
53		write_octeon_64bit_block_dword(block[5], 5);
54		write_octeon_64bit_block_dword(block[6], 6);
55		octeon_md5_start(block[7]);
56
57		data += MD5_BLOCK_SIZE;
58	} while (--nblocks);
59
60	state64[0] = read_octeon_64bit_hash_dword(0);
61	state64[1] = read_octeon_64bit_hash_dword(1);
62	octeon_crypto_disable(&cop2_state, flags);
63
64	le32_to_cpu_array(state->h, ARRAY_SIZE(state->h));
65}