ceph/src/spdk/isa-l/crc/crc16_t10dif_test.c

   1 /**********************************************************************
   2   Copyright(c) 2011-2015 Intel Corporation All rights reserved.
   3
   4   Redistribution and use in source and binary forms, with or without
   5   modification, are permitted provided that the following conditions
   6   are met:
   7     * Redistributions of source code must retain the above copyright
   8       notice, this list of conditions and the following disclaimer.
   9     * Redistributions in binary form must reproduce the above copyright
  10       notice, this list of conditions and the following disclaimer in
  11       the documentation and/or other materials provided with the
  12       distribution.
  13     * Neither the name of Intel Corporation nor the names of its
  14       contributors may be used to endorse or promote products derived
  15       from this software without specific prior written permission.
  16
  17   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 **********************************************************************/
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <stdint.h>
  33 #include <stdlib.h>
  34 #include "crc.h"
  35 #include "types.h"
  36
  37 #ifndef TEST_SEED
  38 # define TEST_SEED 0x1234
  39 #endif
  40
  41 #define MAX_BUF   512
  42 #define TEST_SIZE  20
  43
  44 typedef uint32_t u32;
  45 typedef uint16_t u16;
  46 typedef uint8_t u8;
  47
  48 void rand_buffer(unsigned char *buf, long buffer_size)
  49 {
  50         long i;
  51         for (i = 0; i < buffer_size; i++)
  52                 buf[i] = rand();
  53 }
  54
  55 int main(int argc, char *argv[])
  56 {
  57         int fail = 0;
  58         u32 r = 0;
  59         int verbose = argc - 1;
  60         int i, s;
  61         void *buf_raw;
  62         unsigned char *buf;
  63
  64         printf("Test crc16_t10dif_test ");
  65         if (posix_memalign(&buf_raw, MAX_BUF, MAX_BUF * TEST_SIZE)) {
  66                 printf("alloc error: Fail");
  67                 return -1;
  68         }
  69         buf = (unsigned char *)buf_raw;
  70
  71         srand(TEST_SEED);
  72
  73         // Test of all zeros
  74         memset(buf, 0, MAX_BUF * 10);
  75         u16 crc = crc16_t10dif(TEST_SEED, buf, MAX_BUF);
  76         u16 crc_ref = crc16_t10dif_base(TEST_SEED, buf, MAX_BUF);
  77         if (crc != crc_ref) {
  78                 fail++;
  79                 printf("\n           opt   ref\n");
  80                 printf("         ------ ------\n");
  81                 printf("crc    zero = 0x%4x 0x%4x \n", crc, crc_ref);
  82         } else
  83                 printf(".");
  84
  85         // Another simple test pattern
  86         memset(buf, 0x8a, MAX_BUF);
  87         crc = crc16_t10dif(TEST_SEED, buf, MAX_BUF);
  88         crc_ref = crc16_t10dif_base(TEST_SEED, buf, MAX_BUF);
  89         if (crc != crc_ref) {
  90                 fail++;
  91                 printf("crc  all 8a = 0x%4x 0x%4x\n", crc, crc_ref);
  92         } else
  93                 printf(".");
  94
  95         // Do a few random tests
  96
  97         rand_buffer(buf, MAX_BUF * TEST_SIZE);
  98
  99         for (i = 0; i < TEST_SIZE; i++) {
 100                 crc = crc16_t10dif(TEST_SEED, buf, MAX_BUF);
 101                 crc_ref = crc16_t10dif_base(TEST_SEED, buf, MAX_BUF);
 102                 if (crc != crc_ref)
 103                         fail++;
 104                 if (verbose)
 105                         printf("crc rand%3d = 0x%4x 0x%4x\n", i, crc, crc_ref);
 106                 else
 107                         printf(".");
 108                 buf += MAX_BUF;
 109         }
 110
 111         // Do a few random sizes
 112         buf = (unsigned char *)buf_raw; //reset buf
 113         r = rand();
 114
 115         for (i = MAX_BUF; i >= 0; i--) {
 116                 crc = crc16_t10dif(r, buf, i);
 117                 crc_ref = crc16_t10dif_base(r, buf, i);
 118                 if (crc != crc_ref) {
 119                         fail++;
 120                         printf("fail random size%i 0x%8x 0x%8x\n", i, crc, crc_ref);
 121                 } else
 122                         printf(".");
 123         }
 124
 125         // Try different seeds
 126         for (s = 0; s < 20; s++) {
 127                 buf = (unsigned char *)buf_raw; //reset buf
 128
 129                 r = rand();     // just to get a new seed
 130                 rand_buffer(buf, MAX_BUF * TEST_SIZE);  // new pseudo-rand data
 131
 132                 if (verbose)
 133                         printf("seed = 0x%x\n", r);
 134
 135                 for (i = 0; i < TEST_SIZE; i++) {
 136                         crc = crc16_t10dif(r, buf, MAX_BUF);
 137                         crc_ref = crc16_t10dif_base(r, buf, MAX_BUF);
 138                         if (crc != crc_ref)
 139                                 fail++;
 140                         if (verbose)
 141                                 printf("crc rand%3d = 0x%4x 0x%4x\n", i, crc, crc_ref);
 142                         else
 143                                 printf(".");
 144                         buf += MAX_BUF;
 145                 }
 146         }
 147
 148         // Run tests at end of buffer
 149         buf = (unsigned char *)buf_raw; //reset buf
 150         buf = buf + ((MAX_BUF - 1) * TEST_SIZE);        //Line up TEST_SIZE from end
 151         for (i = 0; i < TEST_SIZE; i++) {
 152                 crc = crc16_t10dif(TEST_SEED, buf + i, TEST_SIZE - i);
 153                 crc_ref = crc16_t10dif_base(TEST_SEED, buf + i, TEST_SIZE - i);
 154                 if (crc != crc_ref)
 155                         fail++;
 156                 if (verbose)
 157                         printf("crc eob rand%3d = 0x%4x 0x%4x\n", i, crc, crc_ref);
 158                 else
 159                         printf(".");
 160         }
 161
 162         printf("Test done: %s\n", fail ? "Fail" : "Pass");
 163         if (fail)
 164                 printf("\nFailed %d tests\n", fail);
 165
 166         return fail;
 167 }