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1 /*-
2  * Copyright (c) 2013-2015 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("$FreeBSD$");
33
34 #include "efsys.h"
35 #include "efx.h"
36 #include "efx_types.h"
37 #include "efx_impl.h"
38
39 /*
40  * Precomputed table for computing IEEE 802.3 CRC32
41  * with polynomial 0x04c11db7 (bit-reversed 0xedb88320)
42  */
43
44 static const uint32_t crc32_table[256] = {
45     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
46     0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
47     0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
48     0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
49     0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
50     0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
51     0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
52     0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
53     0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
54     0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
55     0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
56     0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
57     0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
58     0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
59     0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
60     0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
61     0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
62     0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
63     0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
64     0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
65     0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
66     0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
67     0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
68     0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
69     0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
70     0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
71     0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
72     0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
73     0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
74     0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
75     0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
76     0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
77     0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
78     0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
79     0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
80     0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
81     0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
82     0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
83     0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
84     0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
85     0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
86     0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
87     0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
88     0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
89     0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
90     0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
91     0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
92     0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
93     0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
94     0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
95     0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
96     0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
97     0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
98     0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
99     0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
100     0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
101     0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
102     0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
103     0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
104     0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
105     0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
106     0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
107     0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
108     0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
109 };
110
111 /* Calculate the IEEE 802.3 CRC32 of a MAC addr */
112         __checkReturn           uint32_t
113 efx_crc32_calculate(
114         __in                    uint32_t crc_init,
115         __in_ecount(length)     uint8_t const *input,
116         __in                    int length)
117 {
118         int index;
119         uint32_t crc = crc_init;
120
121         for (index = 0; index < length; index++) {
122                 uint32_t data = *(input++);
123                 crc = (crc >> 8) ^ crc32_table[(crc ^ data) & 0xff];
124         }
125
126         return (crc);
127 }