LXR linux/arch/arm/crypto/sha512-neon-glue.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON
   4 *
   5 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
   6 */
   7
   8#include <crypto/internal/hash.h>
   9#include <crypto/internal/simd.h>
  10#include <crypto/sha.h>
  11#include <crypto/sha512_base.h>
  12#include <linux/crypto.h>
  13#include <linux/module.h>
  14
  15#include <asm/simd.h>
  16#include <asm/neon.h>
  17
  18#include "sha512.h"
  19
  20MODULE_ALIAS_CRYPTO("sha384-neon");
  21MODULE_ALIAS_CRYPTO("sha512-neon");
  22
  23asmlinkage void sha512_block_data_order_neon(u64 *state, u8 const *src,
  24                                             int blocks);
  25
  26static int sha512_neon_update(struct shash_desc *desc, const u8 *data,
  27                              unsigned int len)
  28{
  29        struct sha512_state *sctx = shash_desc_ctx(desc);
  30
  31        if (!crypto_simd_usable() ||
  32            (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
  33                return sha512_arm_update(desc, data, len);
  34
  35        kernel_neon_begin();
  36        sha512_base_do_update(desc, data, len,
  37                (sha512_block_fn *)sha512_block_data_order_neon);
  38        kernel_neon_end();
  39
  40        return 0;
  41}
  42
  43static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
  44                             unsigned int len, u8 *out)
  45{
  46        if (!crypto_simd_usable())
  47                return sha512_arm_finup(desc, data, len, out);
  48
  49        kernel_neon_begin();
  50        if (len)
  51                sha512_base_do_update(desc, data, len,
  52                        (sha512_block_fn *)sha512_block_data_order_neon);
  53        sha512_base_do_finalize(desc,
  54                (sha512_block_fn *)sha512_block_data_order_neon);
  55        kernel_neon_end();
  56
  57        return sha512_base_finish(desc, out);
  58}
  59
  60static int sha512_neon_final(struct shash_desc *desc, u8 *out)
  61{
  62        return sha512_neon_finup(desc, NULL, 0, out);
  63}
  64
  65struct shash_alg sha512_neon_algs[] = { {
  66        .init                   = sha384_base_init,
  67        .update                 = sha512_neon_update,
  68        .final                  = sha512_neon_final,
  69        .finup                  = sha512_neon_finup,
  70        .descsize               = sizeof(struct sha512_state),
  71        .digestsize             = SHA384_DIGEST_SIZE,
  72        .base                   = {
  73                .cra_name               = "sha384",
  74                .cra_driver_name        = "sha384-neon",
  75                .cra_priority           = 300,
  76                .cra_blocksize          = SHA384_BLOCK_SIZE,
  77                .cra_module             = THIS_MODULE,
  78
  79        }
  80},  {
  81        .init                   = sha512_base_init,
  82        .update                 = sha512_neon_update,
  83        .final                  = sha512_neon_final,
  84        .finup                  = sha512_neon_finup,
  85        .descsize               = sizeof(struct sha512_state),
  86        .digestsize             = SHA512_DIGEST_SIZE,
  87        .base                   = {
  88                .cra_name               = "sha512",
  89                .cra_driver_name        = "sha512-neon",
  90                .cra_priority           = 300,
  91                .cra_blocksize          = SHA512_BLOCK_SIZE,
  92                .cra_module             = THIS_MODULE,
  93        }
  94} };
  95