diff options
Diffstat (limited to 'crypto/crct10dif_generic.c')
| -rw-r--r-- | crypto/crct10dif_generic.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/crypto/crct10dif_generic.c b/crypto/crct10dif_generic.c deleted file mode 100644 index 259cb01932cb..000000000000 --- a/crypto/crct10dif_generic.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * Cryptographic API. - * - * T10 Data Integrity Field CRC16 Crypto Transform - * - * Copyright (c) 2007 Oracle Corporation. All rights reserved. - * Written by Martin K. Petersen <martin.petersen@oracle.com> - * 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/module.h> -#include <linux/crc-t10dif.h> -#include <crypto/internal/hash.h> -#include <linux/init.h> -#include <linux/kernel.h> - -struct chksum_desc_ctx { - __u16 crc; -}; - -/* - * Steps through buffer one byte at a 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); - - ctx->crc = crc_t10dif_generic(ctx->crc, data, length); - return 0; -} - -static int chksum_update_arch(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - ctx->crc = crc_t10dif_update(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 crc, const u8 *data, unsigned int len, u8 *out) -{ - *(__u16 *)out = crc_t10dif_generic(crc, data, len); - return 0; -} - -static int __chksum_finup_arch(__u16 crc, const u8 *data, unsigned int len, - u8 *out) -{ - *(__u16 *)out = crc_t10dif_update(crc, 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_finup_arch(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup_arch(ctx->crc, data, len, out); -} - -static int chksum_digest(struct shash_desc *desc, const u8 *data, - unsigned int length, u8 *out) -{ - return __chksum_finup(0, data, length, out); -} - -static int chksum_digest_arch(struct shash_desc *desc, const u8 *data, - unsigned int length, u8 *out) -{ - return __chksum_finup_arch(0, data, length, out); -} - -static struct shash_alg algs[] = {{ - .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", - .base.cra_driver_name = "crct10dif-generic", - .base.cra_priority = 100, - .base.cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}, { - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = chksum_init, - .update = chksum_update_arch, - .final = chksum_final, - .finup = chksum_finup_arch, - .digest = chksum_digest_arch, - .descsize = sizeof(struct chksum_desc_ctx), - .base.cra_name = "crct10dif", - .base.cra_driver_name = "crct10dif-" __stringify(ARCH), - .base.cra_priority = 150, - .base.cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}}; - -static int num_algs; - -static int __init crct10dif_mod_init(void) -{ - /* register the arch flavor only if it differs from the generic one */ - num_algs = 1 + crc_t10dif_is_optimized(); - - return crypto_register_shashes(algs, num_algs); -} - -static void __exit crct10dif_mod_fini(void) -{ - crypto_unregister_shashes(algs, num_algs); -} - -subsys_initcall(crct10dif_mod_init); -module_exit(crct10dif_mod_fini); - -MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>"); -MODULE_DESCRIPTION("T10 DIF CRC calculation."); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CRYPTO("crct10dif"); -MODULE_ALIAS_CRYPTO("crct10dif-generic"); |