1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Cryptographic API.
4 *
5 * SHA-512 and SHA-384 Secure Hash Algorithm.
6 *
7 * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
8 *
9 * Based on crypto/sha512_generic.c, which is:
10 *
11 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
12 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
13 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
14 */
15
16 #include <asm/octeon/crypto.h>
17 #include <asm/octeon/octeon.h>
18
19 /*
20 * We pass everything as 64-bit. OCTEON can handle misaligned data.
21 */
22
sha512_blocks(struct sha512_block_state * state,const u8 * data,size_t nblocks)23 static void sha512_blocks(struct sha512_block_state *state,
24 const u8 *data, size_t nblocks)
25 {
26 struct octeon_cop2_state cop2_state;
27 unsigned long flags;
28
29 if (!octeon_has_crypto())
30 return sha512_blocks_generic(state, data, nblocks);
31
32 flags = octeon_crypto_enable(&cop2_state);
33 write_octeon_64bit_hash_sha512(state->h[0], 0);
34 write_octeon_64bit_hash_sha512(state->h[1], 1);
35 write_octeon_64bit_hash_sha512(state->h[2], 2);
36 write_octeon_64bit_hash_sha512(state->h[3], 3);
37 write_octeon_64bit_hash_sha512(state->h[4], 4);
38 write_octeon_64bit_hash_sha512(state->h[5], 5);
39 write_octeon_64bit_hash_sha512(state->h[6], 6);
40 write_octeon_64bit_hash_sha512(state->h[7], 7);
41
42 do {
43 const u64 *block = (const u64 *)data;
44
45 write_octeon_64bit_block_sha512(block[0], 0);
46 write_octeon_64bit_block_sha512(block[1], 1);
47 write_octeon_64bit_block_sha512(block[2], 2);
48 write_octeon_64bit_block_sha512(block[3], 3);
49 write_octeon_64bit_block_sha512(block[4], 4);
50 write_octeon_64bit_block_sha512(block[5], 5);
51 write_octeon_64bit_block_sha512(block[6], 6);
52 write_octeon_64bit_block_sha512(block[7], 7);
53 write_octeon_64bit_block_sha512(block[8], 8);
54 write_octeon_64bit_block_sha512(block[9], 9);
55 write_octeon_64bit_block_sha512(block[10], 10);
56 write_octeon_64bit_block_sha512(block[11], 11);
57 write_octeon_64bit_block_sha512(block[12], 12);
58 write_octeon_64bit_block_sha512(block[13], 13);
59 write_octeon_64bit_block_sha512(block[14], 14);
60 octeon_sha512_start(block[15]);
61
62 data += SHA512_BLOCK_SIZE;
63 } while (--nblocks);
64
65 state->h[0] = read_octeon_64bit_hash_sha512(0);
66 state->h[1] = read_octeon_64bit_hash_sha512(1);
67 state->h[2] = read_octeon_64bit_hash_sha512(2);
68 state->h[3] = read_octeon_64bit_hash_sha512(3);
69 state->h[4] = read_octeon_64bit_hash_sha512(4);
70 state->h[5] = read_octeon_64bit_hash_sha512(5);
71 state->h[6] = read_octeon_64bit_hash_sha512(6);
72 state->h[7] = read_octeon_64bit_hash_sha512(7);
73 octeon_crypto_disable(&cop2_state, flags);
74 }
75