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 20 MODULE_ALIAS_CRYPTO("sha384-neon"); 21 MODULE_ALIAS_CRYPTO("sha512-neon"); 22 23 asmlinkage void sha512_block_data_order_neon(u64 *state, u8 const *src, 24 int blocks); 25 26 static 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 43 static 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 60 static int sha512_neon_final(struct shash_desc *desc, u8 *out) 61 { 62 return sha512_neon_finup(desc, NULL, 0, out); 63 } 64 65 struct 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