drivers/net/bnxt/tf_core/tf_hash.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019-2020 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include "tf_hash.h"
   7
   8 /* CRC polynomial 0xedb88320 */
   9 static const uint32_t tf_hash_crc32tbl[] = {
  10         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
  11         0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
  12         0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  13         0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
  14         0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
  15         0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  16         0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
  17         0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
  18         0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  19         0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
  20         0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
  21         0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  22         0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
  23         0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
  24         0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  25         0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
  26         0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
  27         0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  28         0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
  29         0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
  30         0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  31         0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
  32         0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
  33         0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  34         0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
  35         0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
  36         0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  37         0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
  38         0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
  39         0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  40         0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
  41         0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
  42         0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  43         0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
  44         0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
  45         0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  46         0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
  47         0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
  48         0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  49         0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
  50         0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
  51         0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  52         0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
  53         0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
  54         0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  55         0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
  56         0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
  57         0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  58         0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
  59         0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
  60         0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  61         0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
  62         0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
  63         0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  64         0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
  65         0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
  66         0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  67         0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
  68         0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
  69         0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  70         0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
  71         0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
  72         0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
  73         0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
  74 };
  75
  76 /**
  77  * Calculate a crc32 on the buffer with an initial value and len
  78  *
  79  * Returns the crc32
  80  */
  81 uint32_t
  82 tf_hash_calc_crc32i(uint32_t init, uint8_t *buf, uint32_t len)
  83 {
  84         uint32_t crc = init;
  85
  86         while (len--)
  87                 crc = tf_hash_crc32tbl[(crc ^ buf[len]) & 0xff] ^
  88                         (crc >> 8);
  89
  90         return crc;
  91 }
  92
  93 /**
  94  * Calculate a crc32 on the buffer with a default initial value
  95  *
  96  * Returns the crc32
  97  */
  98 uint32_t
  99 tf_hash_calc_crc32(uint8_t *buf, uint32_t len)
 100 {
 101         uint32_t crc = ~0U;
 102
 103         crc = tf_hash_calc_crc32i(crc, buf, len);
 104
 105         return ~crc;
 106 }