efx_crc32.c revision 300607 
1/*-
2 * Copyright (c) 2013-2016 Solarflare Communications Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 *    this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 *    this list of conditions and the following disclaimer in the documentation
12 *    and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
24 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * The views and conclusions contained in the software and documentation are
27 * those of the authors and should not be interpreted as representing official
28 * policies, either expressed or implied, of the FreeBSD Project.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/sfxge/common/efx_crc32.c 300607 2016-05-24 12:16:57Z arybchik $");
33
34#include "efx.h"
35#include "efx_impl.h"
36
37/*
38 * Precomputed table for computing IEEE 802.3 CRC32
39 * with polynomial 0x04c11db7 (bit-reversed 0xedb88320)
40 */
41
42static const uint32_t efx_crc32_table[256] = {
43    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
44    0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
45    0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
46    0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
47    0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
48    0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
49    0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
50    0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
51    0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
52    0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
53    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
54    0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
55    0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
56    0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
57    0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
58    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
59    0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
60    0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
61    0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
62    0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
63    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
64    0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
65    0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
66    0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
67    0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
68    0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
69    0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
70    0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
71    0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
72    0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
73    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
74    0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
75    0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
76    0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
77    0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
78    0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
79    0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
80    0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
81    0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
82    0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
83    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
84    0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
85    0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
86    0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
87    0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
88    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
89    0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
90    0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
91    0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
92    0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
93    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
94    0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
95    0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
96    0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
97    0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
98    0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
99    0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
100    0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
101    0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
102    0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
103    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
104    0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
105    0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
106    0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
107};
108
109/* Calculate the IEEE 802.3 CRC32 of a MAC addr */
110	__checkReturn		uint32_t
111efx_crc32_calculate(
112	__in			uint32_t crc_init,
113	__in_ecount(length)	uint8_t const *input,
114	__in			int length)
115{
116	int index;
117	uint32_t crc = crc_init;
118
119	for (index = 0; index < length; index++) {
120		uint32_t data = *(input++);
121		crc = (crc >> 8) ^ efx_crc32_table[(crc ^ data) & 0xff];
122	}
123
124	return (crc);
125}
126