diff options
Diffstat (limited to 'arch/x86/crypto/crct10dif-pclmul_glue.c')
| -rw-r--r-- | arch/x86/crypto/crct10dif-pclmul_glue.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/arch/x86/crypto/crct10dif-pclmul_glue.c b/arch/x86/crypto/crct10dif-pclmul_glue.c deleted file mode 100644 index 7845d7fd54c0..000000000000 --- a/arch/x86/crypto/crct10dif-pclmul_glue.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Cryptographic API. - * - * T10 Data Integrity Field CRC16 Crypto Transform using PCLMULQDQ Instructions - * - * Copyright (C) 2013 Intel Corporation - * Author: Tim Chen <tim.c.chen@linux.intel.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - * - */ - -#include <linux/types.h> -#include <linux/module.h> -#include <linux/crc-t10dif.h> -#include <crypto/internal/hash.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <asm/i387.h> -#include <asm/cpufeature.h> -#include <asm/cpu_device_id.h> - -asmlinkage __u16 crc_t10dif_pcl(__u16 crc, const unsigned char *buf, - size_t len); - -struct chksum_desc_ctx { - __u16 crc; -}; - -/* - * Steps through buffer one byte at at time, calculates reflected - * crc using table. - */ - -static int chksum_init(struct shash_desc *desc) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - ctx->crc = 0; - - return 0; -} - -static int chksum_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - if (irq_fpu_usable()) { - kernel_fpu_begin(); - ctx->crc = crc_t10dif_pcl(ctx->crc, data, length); - kernel_fpu_end(); - } else - ctx->crc = crc_t10dif_generic(ctx->crc, data, length); - return 0; -} - -static int chksum_final(struct shash_desc *desc, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - *(__u16 *)out = ctx->crc; - return 0; -} - -static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len, - u8 *out) -{ - if (irq_fpu_usable()) { - kernel_fpu_begin(); - *(__u16 *)out = crc_t10dif_pcl(*crcp, data, len); - kernel_fpu_end(); - } else - *(__u16 *)out = crc_t10dif_generic(*crcp, data, len); - return 0; -} - -static int chksum_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, len, out); -} - -static int chksum_digest(struct shash_desc *desc, const u8 *data, - unsigned int length, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, length, out); -} - -static struct shash_alg alg = { - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = chksum_init, - .update = chksum_update, - .final = chksum_final, - .finup = chksum_finup, - .digest = chksum_digest, - .descsize = sizeof(struct chksum_desc_ctx), - .base = { - .cra_name = "crct10dif", - .cra_driver_name = "crct10dif-pclmul", - .cra_priority = 200, - .cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}; - -static const struct x86_cpu_id crct10dif_cpu_id[] = { - X86_FEATURE_MATCH(X86_FEATURE_PCLMULQDQ), - {} -}; -MODULE_DEVICE_TABLE(x86cpu, crct10dif_cpu_id); - -static int __init crct10dif_intel_mod_init(void) -{ - if (!x86_match_cpu(crct10dif_cpu_id)) - return -ENODEV; - - return crypto_register_shash(&alg); -} - -static void __exit crct10dif_intel_mod_fini(void) -{ - crypto_unregister_shash(&alg); -} - -module_init(crct10dif_intel_mod_init); -module_exit(crct10dif_intel_mod_fini); - -MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>"); -MODULE_DESCRIPTION("T10 DIF CRC calculation accelerated with PCLMULQDQ."); -MODULE_LICENSE("GPL"); - -MODULE_ALIAS("crct10dif"); -MODULE_ALIAS("crct10dif-pclmul"); |
