194742Sobrien// SPDX-License-Identifier: GPL-2.0-or-later 294742Sobrien/* 3146890Speter * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using 4146890Speter * ARM NEON instructions. 5146890Speter * 6146890Speter * Copyright �� 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> 7146890Speter * 8146890Speter * This file is based on sha1_generic.c and sha1_ssse3_glue.c: 9146890Speter * Copyright (c) Alan Smithee. 10146890Speter * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> 11146890Speter * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> 12146890Speter * Copyright (c) Mathias Krause <minipli@googlemail.com> 13146890Speter * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com> 14146890Speter */ 15146890Speter 16146890Speter#include <crypto/internal/hash.h> 17146890Speter#include <crypto/internal/simd.h> 18146890Speter#include <linux/init.h> 19146890Speter#include <linux/module.h> 20146890Speter#include <linux/mm.h> 2194742Sobrien#include <linux/types.h> 2295253Sru#include <crypto/sha1.h> 2394742Sobrien#include <crypto/sha1_base.h> 2496991Srwatson#include <asm/neon.h> 2596991Srwatson#include <asm/simd.h> 2696991Srwatson 27102773Srwatson#include "sha1.h" 28102773Srwatson 2994854Ssosasmlinkage void sha1_transform_neon(struct sha1_state *state_h, 3094917Simp const u8 *data, int rounds); 31126445Sobrien 3294917Simpstatic int sha1_neon_update(struct shash_desc *desc, const u8 *data, 3394917Simp unsigned int len) 34146933Simp{ 35146918Smarkm struct sha1_state *sctx = shash_desc_ctx(desc); 36146918Smarkm 37125244Snectar if (!crypto_simd_usable() || 38125244Snectar (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE) 3994847Sjhb return sha1_update_arm(desc, data, len); 4094847Sjhb 4194847Sjhb kernel_neon_begin(); 42126337Svkashyap sha1_base_do_update(desc, data, len, sha1_transform_neon); 43128023Svkashyap kernel_neon_end(); 4494855Sscottl 45126054Sscottl return 0; 46126054Sscottl} 47126054Sscottl 48126054Sscottlstatic int sha1_neon_finup(struct shash_desc *desc, const u8 *data, 49126054Sscottl unsigned int len, u8 *out) 50126054Sscottl{ 5194915Sken if (!crypto_simd_usable()) 5299607Smjacob return sha1_finup_arm(desc, data, len, out); 5394915Sken 5494915Sken kernel_neon_begin(); 5594915Sken if (len) 5694915Sken sha1_base_do_update(desc, data, len, sha1_transform_neon); 5794915Sken sha1_base_do_finalize(desc, sha1_transform_neon); 5894915Sken kernel_neon_end(); 5994915Sken 6094915Sken return sha1_base_finish(desc, out); 6199607Smjacob} 62106734Smjacob 63128435Stackermanstatic int sha1_neon_final(struct shash_desc *desc, u8 *out) 6497611Sbillf{ 6594918Sgshapiro return sha1_neon_finup(desc, NULL, 0, out); 6694918Sgshapiro} 6794918Sgshapiro 6894918Sgshapirostatic struct shash_alg alg = { 6994918Sgshapiro .digestsize = SHA1_DIGEST_SIZE, 70118316Smbr .init = sha1_base_init, 7194955Smurray .update = sha1_neon_update, 72106187Sdes .final = sha1_neon_final, 73106187Sdes .finup = sha1_neon_finup, 7495455Sdes .descsize = sizeof(struct sha1_state), 7598750Sdes .base = { 7699606Sdes .cra_name = "sha1", 7799606Sdes .cra_driver_name = "sha1-neon", 7899606Sdes .cra_priority = 250, 7996268Sgad .cra_blocksize = SHA1_BLOCK_SIZE, 8096268Sgad .cra_module = THIS_MODULE, 81116233Sgad } 82139390Sgad}; 83139390Sgad 84139390Sgadstatic int __init sha1_neon_mod_init(void) 8596332Speter{ 8696332Speter if (!cpu_has_neon()) 8796332Speter return -ENODEV; 8896332Speter 8996332Speter return crypto_register_shash(&alg); 90100314Sru} 91146921Sru 92146921Srustatic void __exit sha1_neon_mod_fini(void) 9397611Sbillf{ 9498333Sanholt crypto_unregister_shash(&alg); 95111061Sjmallett} 9699732Sjoerg 9799732Sjoergmodule_init(sha1_neon_mod_init); 98113692Snectarmodule_exit(sha1_neon_mod_fini); 99113692Snectar 100115825SfanfMODULE_LICENSE("GPL"); 101126445SobrienMODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated"); 102117645SdwmaloneMODULE_ALIAS_CRYPTO("sha1"); 103118204Sbp