Root/
Source at commit fbf123cd4cc0c097fe9a99c90109ebb2a5e94a50 created 10 years 3 months ago. By Lars-Peter Clausen, dma: jz4740: Dequeue descriptor from active list before completing it | |
---|---|
1 | /* |
2 | * Cryptographic API. |
3 | * |
4 | * T10 Data Integrity Field CRC16 Crypto Transform |
5 | * |
6 | * Copyright (c) 2007 Oracle Corporation. All rights reserved. |
7 | * Written by Martin K. Petersen <martin.petersen@oracle.com> |
8 | * Copyright (C) 2013 Intel Corporation |
9 | * Author: Tim Chen <tim.c.chen@linux.intel.com> |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify it |
12 | * under the terms of the GNU General Public License as published by the Free |
13 | * Software Foundation; either version 2 of the License, or (at your option) |
14 | * any later version. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
17 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
19 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
20 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
21 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
23 | * SOFTWARE. |
24 | * |
25 | */ |
26 | |
27 | #include <linux/module.h> |
28 | #include <linux/crc-t10dif.h> |
29 | #include <crypto/internal/hash.h> |
30 | #include <linux/init.h> |
31 | #include <linux/kernel.h> |
32 | |
33 | struct chksum_desc_ctx { |
34 | __u16 crc; |
35 | }; |
36 | |
37 | /* |
38 | * Steps through buffer one byte at at time, calculates reflected |
39 | * crc using table. |
40 | */ |
41 | |
42 | static int chksum_init(struct shash_desc *desc) |
43 | { |
44 | struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); |
45 | |
46 | ctx->crc = 0; |
47 | |
48 | return 0; |
49 | } |
50 | |
51 | static int chksum_update(struct shash_desc *desc, const u8 *data, |
52 | unsigned int length) |
53 | { |
54 | struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); |
55 | |
56 | ctx->crc = crc_t10dif_generic(ctx->crc, data, length); |
57 | return 0; |
58 | } |
59 | |
60 | static int chksum_final(struct shash_desc *desc, u8 *out) |
61 | { |
62 | struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); |
63 | |
64 | *(__u16 *)out = ctx->crc; |
65 | return 0; |
66 | } |
67 | |
68 | static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len, |
69 | u8 *out) |
70 | { |
71 | *(__u16 *)out = crc_t10dif_generic(*crcp, data, len); |
72 | return 0; |
73 | } |
74 | |
75 | static int chksum_finup(struct shash_desc *desc, const u8 *data, |
76 | unsigned int len, u8 *out) |
77 | { |
78 | struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); |
79 | |
80 | return __chksum_finup(&ctx->crc, data, len, out); |
81 | } |
82 | |
83 | static int chksum_digest(struct shash_desc *desc, const u8 *data, |
84 | unsigned int length, u8 *out) |
85 | { |
86 | struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); |
87 | |
88 | return __chksum_finup(&ctx->crc, data, length, out); |
89 | } |
90 | |
91 | static struct shash_alg alg = { |
92 | .digestsize = CRC_T10DIF_DIGEST_SIZE, |
93 | .init = chksum_init, |
94 | .update = chksum_update, |
95 | .final = chksum_final, |
96 | .finup = chksum_finup, |
97 | .digest = chksum_digest, |
98 | .descsize = sizeof(struct chksum_desc_ctx), |
99 | .base = { |
100 | .cra_name = "crct10dif", |
101 | .cra_driver_name = "crct10dif-generic", |
102 | .cra_priority = 100, |
103 | .cra_blocksize = CRC_T10DIF_BLOCK_SIZE, |
104 | .cra_module = THIS_MODULE, |
105 | } |
106 | }; |
107 | |
108 | static int __init crct10dif_mod_init(void) |
109 | { |
110 | int ret; |
111 | |
112 | ret = crypto_register_shash(&alg); |
113 | return ret; |
114 | } |
115 | |
116 | static void __exit crct10dif_mod_fini(void) |
117 | { |
118 | crypto_unregister_shash(&alg); |
119 | } |
120 | |
121 | module_init(crct10dif_mod_init); |
122 | module_exit(crct10dif_mod_fini); |
123 | |
124 | MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>"); |
125 | MODULE_DESCRIPTION("T10 DIF CRC calculation."); |
126 | MODULE_LICENSE("GPL"); |
127 | MODULE_ALIAS("crct10dif"); |
128 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9