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head/sys/dev/sfxge/common/efx_crc32.c
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svn:eol-style | null | native \ No newline at end of property |
svn:keywords | null | FreeBSD=%H \ No newline at end of property |
svn:mime-type | null | text/plain \ No newline at end of property |
/*- | |||||
* Copyright (c) 2013-2015 Solarflare Communications Inc. | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions are met: | |||||
* | |||||
* 1. Redistributions of source code must retain the above copyright notice, | |||||
* this list of conditions and the following disclaimer. | |||||
* 2. Redistributions in binary form must reproduce the above copyright notice, | |||||
* this list of conditions and the following disclaimer in the documentation | |||||
* and/or other materials provided with the distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |||||
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |||||
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |||||
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |||||
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |||||
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |||||
* | |||||
* The views and conclusions contained in the software and documentation are | |||||
* those of the authors and should not be interpreted as representing official | |||||
* policies, either expressed or implied, of the FreeBSD Project. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
#include "efsys.h" | |||||
#include "efx.h" | |||||
#include "efx_types.h" | |||||
#include "efx_impl.h" | |||||
/* | |||||
* Precomputed table for computing IEEE 802.3 CRC32 | |||||
* with polynomial 0x04c11db7 (bit-reversed 0xedb88320) | |||||
*/ | |||||
static const uint32_t crc32_table[256] = { | |||||
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, | |||||
0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, | |||||
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, | |||||
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, | |||||
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, | |||||
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, | |||||
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, | |||||
0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, | |||||
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, | |||||
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, | |||||
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, | |||||
0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, | |||||
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, | |||||
0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, | |||||
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, | |||||
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, | |||||
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, | |||||
0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, | |||||
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, | |||||
0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, | |||||
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, | |||||
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, | |||||
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, | |||||
0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, | |||||
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, | |||||
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, | |||||
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, | |||||
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, | |||||
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, | |||||
0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, | |||||
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, | |||||
0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, | |||||
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, | |||||
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, | |||||
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, | |||||
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, | |||||
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, | |||||
0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, | |||||
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, | |||||
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, | |||||
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, | |||||
0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, | |||||
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, | |||||
0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, | |||||
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, | |||||
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, | |||||
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, | |||||
0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, | |||||
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, | |||||
0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, | |||||
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, | |||||
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, | |||||
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, | |||||
0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, | |||||
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, | |||||
0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, | |||||
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, | |||||
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, | |||||
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, | |||||
0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, | |||||
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, | |||||
0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, | |||||
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, | |||||
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d | |||||
}; | |||||
/* Calculate the IEEE 802.3 CRC32 of a MAC addr */ | |||||
__checkReturn uint32_t | |||||
efx_crc32_calculate( | |||||
__in uint32_t crc_init, | |||||
__in_ecount(length) uint8_t const *input, | |||||
__in int length) | |||||
{ | |||||
int index; | |||||
uint32_t crc = crc_init; | |||||
for (index = 0; index < length; index++) { | |||||
uint32_t data = *(input++); | |||||
crc = (crc >> 8) ^ crc32_table[(crc ^ data) & 0xff]; | |||||
} | |||||
return (crc); | |||||
} |