Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <crypto/internal/simd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <crypto/sha.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <crypto/sha1_base.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/cpufeature.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/hwcap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/neon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/simd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "sha1.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) asmlinkage void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 				  int blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			  unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	struct sha1_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	if (!crypto_simd_usable() ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	    (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		return sha1_update_arm(desc, data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	kernel_neon_begin();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	sha1_base_do_update(desc, data, len, sha1_ce_transform);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	kernel_neon_end();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 			 unsigned int len, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (!crypto_simd_usable())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		return sha1_finup_arm(desc, data, len, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	kernel_neon_begin();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	if (len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		sha1_base_do_update(desc, data, len, sha1_ce_transform);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	sha1_base_do_finalize(desc, sha1_ce_transform);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	kernel_neon_end();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	return sha1_base_finish(desc, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int sha1_ce_final(struct shash_desc *desc, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	return sha1_ce_finup(desc, NULL, 0, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static struct shash_alg alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	.init			= sha1_base_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	.update			= sha1_ce_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	.final			= sha1_ce_final,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	.finup			= sha1_ce_finup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	.descsize		= sizeof(struct sha1_state),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	.digestsize		= SHA1_DIGEST_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	.base			= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		.cra_name		= "sha1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 		.cra_driver_name	= "sha1-ce",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 		.cra_priority		= 200,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 		.cra_blocksize		= SHA1_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 		.cra_module		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int __init sha1_ce_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 	return crypto_register_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static void __exit sha1_ce_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	crypto_unregister_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) module_cpu_feature_match(SHA1, sha1_ce_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) module_exit(sha1_ce_mod_fini);