diff options
Diffstat (limited to 'arch/arm64/crypto/crct10dif-ce-glue.c')
-rw-r--r-- | arch/arm64/crypto/crct10dif-ce-glue.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/arch/arm64/crypto/crct10dif-ce-glue.c b/arch/arm64/crypto/crct10dif-ce-glue.c deleted file mode 100644 index 08bcbd884395..000000000000 --- a/arch/arm64/crypto/crct10dif-ce-glue.c +++ /dev/null @@ -1,132 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Accelerated CRC-T10DIF using arm64 NEON and Crypto Extensions instructions - * - * Copyright (C) 2016 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org> - */ - -#include <linux/cpufeature.h> -#include <linux/crc-t10dif.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/string.h> - -#include <crypto/internal/hash.h> -#include <crypto/internal/simd.h> - -#include <asm/neon.h> -#include <asm/simd.h> - -#define CRC_T10DIF_PMULL_CHUNK_SIZE 16U - -asmlinkage void crc_t10dif_pmull_p8(u16 init_crc, const u8 *buf, size_t len, - u8 out[16]); -asmlinkage u16 crc_t10dif_pmull_p64(u16 init_crc, const u8 *buf, size_t len); - -static int crct10dif_init(struct shash_desc *desc) -{ - u16 *crc = shash_desc_ctx(desc); - - *crc = 0; - return 0; -} - -static int crct10dif_update_pmull_p8(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u16 *crcp = shash_desc_ctx(desc); - u16 crc = *crcp; - u8 buf[16]; - - if (length > CRC_T10DIF_PMULL_CHUNK_SIZE && crypto_simd_usable()) { - kernel_neon_begin(); - crc_t10dif_pmull_p8(crc, data, length, buf); - kernel_neon_end(); - - crc = 0; - data = buf; - length = sizeof(buf); - } - - *crcp = crc_t10dif_generic(crc, data, length); - return 0; -} - -static int crct10dif_update_pmull_p64(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u16 *crc = shash_desc_ctx(desc); - - if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE && crypto_simd_usable()) { - kernel_neon_begin(); - *crc = crc_t10dif_pmull_p64(*crc, data, length); - kernel_neon_end(); - } else { - *crc = crc_t10dif_generic(*crc, data, length); - } - - return 0; -} - -static int crct10dif_final(struct shash_desc *desc, u8 *out) -{ - u16 *crc = shash_desc_ctx(desc); - - *(u16 *)out = *crc; - return 0; -} - -static struct shash_alg crc_t10dif_alg[] = {{ - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = crct10dif_init, - .update = crct10dif_update_pmull_p8, - .final = crct10dif_final, - .descsize = CRC_T10DIF_DIGEST_SIZE, - - .base.cra_name = "crct10dif", - .base.cra_driver_name = "crct10dif-arm64-neon", - .base.cra_priority = 150, - .base.cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}, { - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = crct10dif_init, - .update = crct10dif_update_pmull_p64, - .final = crct10dif_final, - .descsize = CRC_T10DIF_DIGEST_SIZE, - - .base.cra_name = "crct10dif", - .base.cra_driver_name = "crct10dif-arm64-ce", - .base.cra_priority = 200, - .base.cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}}; - -static int __init crc_t10dif_mod_init(void) -{ - if (cpu_have_named_feature(PMULL)) - return crypto_register_shashes(crc_t10dif_alg, - ARRAY_SIZE(crc_t10dif_alg)); - else - /* only register the first array element */ - return crypto_register_shash(crc_t10dif_alg); -} - -static void __exit crc_t10dif_mod_exit(void) -{ - if (cpu_have_named_feature(PMULL)) - crypto_unregister_shashes(crc_t10dif_alg, - ARRAY_SIZE(crc_t10dif_alg)); - else - crypto_unregister_shash(crc_t10dif_alg); -} - -module_cpu_feature_match(ASIMD, crc_t10dif_mod_init); -module_exit(crc_t10dif_mod_exit); - -MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); -MODULE_DESCRIPTION("CRC-T10DIF using arm64 NEON and Crypto Extensions"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_CRYPTO("crct10dif"); -MODULE_ALIAS_CRYPTO("crct10dif-arm64-ce"); |