Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * sha2-ce-glue.c - SHA-224/SHA-256 using ARMv8 Crypto Extensions
 *
 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
 */
 
#include <crypto/internal/hash.h>
#include <crypto/internal/simd.h>
#include <crypto/sha.h>
#include <crypto/sha256_base.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/module.h>
 
#include <asm/hwcap.h>
#include <asm/simd.h>
#include <asm/neon.h>
#include <asm/unaligned.h>
 
#include "sha256_glue.h"
 
MODULE_DESCRIPTION("SHA-224/SHA-256 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
 
asmlinkage void sha2_ce_transform(struct sha256_state *sst, u8 const *src,
<------><------><------><------>  int blocks);
 
static int sha2_ce_update(struct shash_desc *desc, const u8 *data,
<------><------><------>  unsigned int len)
{
<------>struct sha256_state *sctx = shash_desc_ctx(desc);
 
<------>if (!crypto_simd_usable() ||
<------>    (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
<------><------>return crypto_sha256_arm_update(desc, data, len);
 
<------>kernel_neon_begin();
<------>sha256_base_do_update(desc, data, len,
<------><------><------>      (sha256_block_fn *)sha2_ce_transform);
<------>kernel_neon_end();
 
<------>return 0;
}
 
static int sha2_ce_finup(struct shash_desc *desc, const u8 *data,
<------><------><------> unsigned int len, u8 *out)
{
<------>if (!crypto_simd_usable())
<------><------>return crypto_sha256_arm_finup(desc, data, len, out);
 
<------>kernel_neon_begin();
<------>if (len)
<------><------>sha256_base_do_update(desc, data, len,
<------><------><------><------>      (sha256_block_fn *)sha2_ce_transform);
<------>sha256_base_do_finalize(desc, (sha256_block_fn *)sha2_ce_transform);
<------>kernel_neon_end();
 
<------>return sha256_base_finish(desc, out);
}
 
static int sha2_ce_final(struct shash_desc *desc, u8 *out)
{
<------>return sha2_ce_finup(desc, NULL, 0, out);
}
 
static struct shash_alg algs[] = { {
<------>.init			= sha224_base_init,
<------>.update			= sha2_ce_update,
<------>.final			= sha2_ce_final,
<------>.finup			= sha2_ce_finup,
<------>.descsize		= sizeof(struct sha256_state),
<------>.digestsize		= SHA224_DIGEST_SIZE,
<------>.base			= {
<------><------>.cra_name		= "sha224",
<------><------>.cra_driver_name	= "sha224-ce",
<------><------>.cra_priority		= 300,
<------><------>.cra_blocksize		= SHA256_BLOCK_SIZE,
<------><------>.cra_module		= THIS_MODULE,
<------>}
}, {
<------>.init			= sha256_base_init,
<------>.update			= sha2_ce_update,
<------>.final			= sha2_ce_final,
<------>.finup			= sha2_ce_finup,
<------>.descsize		= sizeof(struct sha256_state),
<------>.digestsize		= SHA256_DIGEST_SIZE,
<------>.base			= {
<------><------>.cra_name		= "sha256",
<------><------>.cra_driver_name	= "sha256-ce",
<------><------>.cra_priority		= 300,
<------><------>.cra_blocksize		= SHA256_BLOCK_SIZE,
<------><------>.cra_module		= THIS_MODULE,
<------>}
} };
 
static int __init sha2_ce_mod_init(void)
{
<------>return crypto_register_shashes(algs, ARRAY_SIZE(algs));
}
 
static void __exit sha2_ce_mod_fini(void)
{
<------>crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
}
 
module_cpu_feature_match(SHA2, sha2_ce_mod_init);
module_exit(sha2_ce_mod_fini);