1*e96cb950SEric Biggers /* SPDX-License-Identifier: GPL-2.0-or-later */
2*e96cb950SEric Biggers /*
3*e96cb950SEric Biggers * SHA-256 Secure Hash Algorithm.
4*e96cb950SEric Biggers *
5*e96cb950SEric Biggers * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
6*e96cb950SEric Biggers *
7*e96cb950SEric Biggers * Based on crypto/sha256_generic.c, which is:
8*e96cb950SEric Biggers *
9*e96cb950SEric Biggers * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
10*e96cb950SEric Biggers * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
11*e96cb950SEric Biggers * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
12*e96cb950SEric Biggers * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
13*e96cb950SEric Biggers */
14*e96cb950SEric Biggers
15*e96cb950SEric Biggers #include <asm/octeon/crypto.h>
16*e96cb950SEric Biggers #include <asm/octeon/octeon.h>
17*e96cb950SEric Biggers
18*e96cb950SEric Biggers /*
19*e96cb950SEric Biggers * We pass everything as 64-bit. OCTEON can handle misaligned data.
20*e96cb950SEric Biggers */
21*e96cb950SEric Biggers
sha256_blocks(struct sha256_block_state * state,const u8 * data,size_t nblocks)22*e96cb950SEric Biggers static void sha256_blocks(struct sha256_block_state *state,
23*e96cb950SEric Biggers const u8 *data, size_t nblocks)
24*e96cb950SEric Biggers {
25*e96cb950SEric Biggers struct octeon_cop2_state cop2_state;
26*e96cb950SEric Biggers u64 *state64 = (u64 *)state;
27*e96cb950SEric Biggers unsigned long flags;
28*e96cb950SEric Biggers
29*e96cb950SEric Biggers if (!octeon_has_crypto())
30*e96cb950SEric Biggers return sha256_blocks_generic(state, data, nblocks);
31*e96cb950SEric Biggers
32*e96cb950SEric Biggers flags = octeon_crypto_enable(&cop2_state);
33*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[0], 0);
34*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[1], 1);
35*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[2], 2);
36*e96cb950SEric Biggers write_octeon_64bit_hash_dword(state64[3], 3);
37*e96cb950SEric Biggers
38*e96cb950SEric Biggers do {
39*e96cb950SEric Biggers const u64 *block = (const u64 *)data;
40*e96cb950SEric Biggers
41*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[0], 0);
42*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[1], 1);
43*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[2], 2);
44*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[3], 3);
45*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[4], 4);
46*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[5], 5);
47*e96cb950SEric Biggers write_octeon_64bit_block_dword(block[6], 6);
48*e96cb950SEric Biggers octeon_sha256_start(block[7]);
49*e96cb950SEric Biggers
50*e96cb950SEric Biggers data += SHA256_BLOCK_SIZE;
51*e96cb950SEric Biggers } while (--nblocks);
52*e96cb950SEric Biggers
53*e96cb950SEric Biggers state64[0] = read_octeon_64bit_hash_dword(0);
54*e96cb950SEric Biggers state64[1] = read_octeon_64bit_hash_dword(1);
55*e96cb950SEric Biggers state64[2] = read_octeon_64bit_hash_dword(2);
56*e96cb950SEric Biggers state64[3] = read_octeon_64bit_hash_dword(3);
57*e96cb950SEric Biggers octeon_crypto_disable(&cop2_state, flags);
58*e96cb950SEric Biggers }
59