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("$FreeBSD$"); 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 42 static 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 111 efx_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