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
md5_blocks(struct md5_block_state * state,const u8 * data,size_t nblocks)29 static 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 }
66