| Ard Biesheuvel | c80ae7c | 2015-05-08 10:46:21 +0200 | [diff] [blame] | 1 | /* |
| 2 | * sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON |
| 3 | * |
| 4 | * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <crypto/internal/hash.h> |
| 12 | #include <crypto/sha.h> |
| 13 | #include <crypto/sha512_base.h> |
| 14 | #include <linux/crypto.h> |
| 15 | #include <linux/module.h> |
| 16 | |
| 17 | #include <asm/simd.h> |
| 18 | #include <asm/neon.h> |
| 19 | |
| 20 | #include "sha512.h" |
| 21 | |
| 22 | MODULE_ALIAS_CRYPTO("sha384-neon"); |
| 23 | MODULE_ALIAS_CRYPTO("sha512-neon"); |
| 24 | |
| 25 | asmlinkage void sha512_block_data_order_neon(u64 *state, u8 const *src, |
| 26 | int blocks); |
| 27 | |
| 28 | static int sha512_neon_update(struct shash_desc *desc, const u8 *data, |
| 29 | unsigned int len) |
| 30 | { |
| 31 | struct sha512_state *sctx = shash_desc_ctx(desc); |
| 32 | |
| 33 | if (!may_use_simd() || |
| 34 | (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE) |
| 35 | return sha512_arm_update(desc, data, len); |
| 36 | |
| 37 | kernel_neon_begin(); |
| 38 | sha512_base_do_update(desc, data, len, |
| 39 | (sha512_block_fn *)sha512_block_data_order_neon); |
| 40 | kernel_neon_end(); |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static int sha512_neon_finup(struct shash_desc *desc, const u8 *data, |
| 46 | unsigned int len, u8 *out) |
| 47 | { |
| 48 | if (!may_use_simd()) |
| 49 | return sha512_arm_finup(desc, data, len, out); |
| 50 | |
| 51 | kernel_neon_begin(); |
| 52 | if (len) |
| 53 | sha512_base_do_update(desc, data, len, |
| 54 | (sha512_block_fn *)sha512_block_data_order_neon); |
| 55 | sha512_base_do_finalize(desc, |
| 56 | (sha512_block_fn *)sha512_block_data_order_neon); |
| 57 | kernel_neon_end(); |
| 58 | |
| 59 | return sha512_base_finish(desc, out); |
| 60 | } |
| 61 | |
| 62 | static int sha512_neon_final(struct shash_desc *desc, u8 *out) |
| 63 | { |
| 64 | return sha512_neon_finup(desc, NULL, 0, out); |
| 65 | } |
| 66 | |
| 67 | struct shash_alg sha512_neon_algs[] = { { |
| 68 | .init = sha384_base_init, |
| 69 | .update = sha512_neon_update, |
| 70 | .final = sha512_neon_final, |
| 71 | .finup = sha512_neon_finup, |
| 72 | .descsize = sizeof(struct sha512_state), |
| 73 | .digestsize = SHA384_DIGEST_SIZE, |
| 74 | .base = { |
| 75 | .cra_name = "sha384", |
| 76 | .cra_driver_name = "sha384-neon", |
| 77 | .cra_priority = 300, |
| 78 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 79 | .cra_blocksize = SHA384_BLOCK_SIZE, |
| 80 | .cra_module = THIS_MODULE, |
| 81 | |
| 82 | } |
| 83 | }, { |
| 84 | .init = sha512_base_init, |
| 85 | .update = sha512_neon_update, |
| 86 | .final = sha512_neon_final, |
| 87 | .finup = sha512_neon_finup, |
| 88 | .descsize = sizeof(struct sha512_state), |
| 89 | .digestsize = SHA512_DIGEST_SIZE, |
| 90 | .base = { |
| 91 | .cra_name = "sha512", |
| 92 | .cra_driver_name = "sha512-neon", |
| 93 | .cra_priority = 300, |
| 94 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 95 | .cra_blocksize = SHA512_BLOCK_SIZE, |
| 96 | .cra_module = THIS_MODULE, |
| 97 | } |
| 98 | } }; |