1 /* 1
2 * Cryptographic API.
3 *
4 * T10 Data Integrity Field CRC16 Crypto Trans
5 *
6 * Copyright (c) 2007 Oracle Corporation. All
7 * Written by Martin K. Petersen <martin.peter
8 * Copyright (C) 2013 Intel Corporation
9 * Author: Tim Chen <tim.c.chen@linux.intel.co
10 *
11 * This program is free software; you can redi
12 * under the terms of the GNU General Public L
13 * Software Foundation; either version 2 of th
14 * any later version.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT W
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMIT
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR P
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTH
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER L
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARIS
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * SOFTWARE.
24 *
25 */
26
27 #include <linux/crc-t10dif.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30
31 /* Table generated using the following polynom
32 * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5
33 * gt: 0x8bb7
34 */
35 static const __u16 t10_dif_crc_table[256] = {
36 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205
37 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8
38 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8
39 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975
40 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F
41 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422
42 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52
43 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF
44 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86
45 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B
46 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B
47 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6
48 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C
49 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1
50 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1
51 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C
52 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4
53 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709
54 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79
55 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4
56 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E
57 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93
58 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3
59 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E
60 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037
61 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A
62 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA
63 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47
64 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD
65 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610
66 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60
67 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD
68 };
69
70 __u16 crc_t10dif_generic(__u16 crc, const unsi
71 {
72 unsigned int i;
73
74 for (i = 0 ; i < len ; i++)
75 crc = (crc << 8) ^ t10_dif_crc
76
77 return crc;
78 }
79 EXPORT_SYMBOL(crc_t10dif_generic);
80
81 MODULE_DESCRIPTION("T10 DIF CRC calculation co
82 MODULE_LICENSE("GPL");
83
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