ceph/src/spdk/dpdk/test/test/test_memcpy.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <stdlib.h>
   9
  10 #include <rte_common.h>
  11 #include <rte_random.h>
  12 #include <rte_memcpy.h>
  13
  14 #include "test.h"
  15
  16 /*
  17  * Set this to the maximum buffer size you want to test. If it is 0, then the
  18  * values in the buf_sizes[] array below will be used.
  19  */
  20 #define TEST_VALUE_RANGE        0
  21
  22 /* List of buffer sizes to test */
  23 #if TEST_VALUE_RANGE == 0
  24 static size_t buf_sizes[] = {
  25         0, 1, 7, 8, 9, 15, 16, 17, 31, 32, 33, 63, 64, 65, 127, 128, 129, 255,
  26         256, 257, 320, 384, 511, 512, 513, 1023, 1024, 1025, 1518, 1522, 1600,
  27         2048, 3072, 4096, 5120, 6144, 7168, 8192
  28 };
  29 /* MUST be as large as largest packet size above */
  30 #define SMALL_BUFFER_SIZE       8192
  31 #else /* TEST_VALUE_RANGE != 0 */
  32 static size_t buf_sizes[TEST_VALUE_RANGE];
  33 #define SMALL_BUFFER_SIZE       TEST_VALUE_RANGE
  34 #endif /* TEST_VALUE_RANGE == 0 */
  35
  36 /* Data is aligned on this many bytes (power of 2) */
  37 #define ALIGNMENT_UNIT          32
  38
  39
  40 /*
  41  * Create two buffers, and initialise one with random values. These are copied
  42  * to the second buffer and then compared to see if the copy was successful.
  43  * The bytes outside the copied area are also checked to make sure they were not
  44  * changed.
  45  */
  46 static int
  47 test_single_memcpy(unsigned int off_src, unsigned int off_dst, size_t size)
  48 {
  49         unsigned int i;
  50         uint8_t dest[SMALL_BUFFER_SIZE + ALIGNMENT_UNIT];
  51         uint8_t src[SMALL_BUFFER_SIZE + ALIGNMENT_UNIT];
  52         void * ret;
  53
  54         /* Setup buffers */
  55         for (i = 0; i < SMALL_BUFFER_SIZE + ALIGNMENT_UNIT; i++) {
  56                 dest[i] = 0;
  57                 src[i] = (uint8_t) rte_rand();
  58         }
  59
  60         /* Do the copy */
  61         ret = rte_memcpy(dest + off_dst, src + off_src, size);
  62         if (ret != (dest + off_dst)) {
  63                 printf("rte_memcpy() returned %p, not %p\n",
  64                        ret, dest + off_dst);
  65         }
  66
  67         /* Check nothing before offset is affected */
  68         for (i = 0; i < off_dst; i++) {
  69                 if (dest[i] != 0) {
  70                         printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
  71                                "[modified before start of dst].\n",
  72                                (unsigned)size, off_src, off_dst);
  73                         return -1;
  74                 }
  75         }
  76
  77         /* Check everything was copied */
  78         for (i = 0; i < size; i++) {
  79                 if (dest[i + off_dst] != src[i + off_src]) {
  80                         printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
  81                                "[didn't copy byte %u].\n",
  82                                (unsigned)size, off_src, off_dst, i);
  83                         return -1;
  84                 }
  85         }
  86
  87         /* Check nothing after copy was affected */
  88         for (i = size; i < SMALL_BUFFER_SIZE; i++) {
  89                 if (dest[i + off_dst] != 0) {
  90                         printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
  91                                "[copied too many].\n",
  92                                (unsigned)size, off_src, off_dst);
  93                         return -1;
  94                 }
  95         }
  96         return 0;
  97 }
  98
  99 /*
 100  * Check functionality for various buffer sizes and data offsets/alignments.
 101  */
 102 static int
 103 func_test(void)
 104 {
 105         unsigned int off_src, off_dst, i;
 106         unsigned int num_buf_sizes = sizeof(buf_sizes) / sizeof(buf_sizes[0]);
 107         int ret;
 108
 109         for (off_src = 0; off_src < ALIGNMENT_UNIT; off_src++) {
 110                 for (off_dst = 0; off_dst < ALIGNMENT_UNIT; off_dst++) {
 111                         for (i = 0; i < num_buf_sizes; i++) {
 112                                 ret = test_single_memcpy(off_src, off_dst,
 113                                                          buf_sizes[i]);
 114                                 if (ret != 0)
 115                                         return -1;
 116                         }
 117                 }
 118         }
 119         return 0;
 120 }
 121
 122 static int
 123 test_memcpy(void)
 124 {
 125         int ret;
 126
 127         ret = func_test();
 128         if (ret != 0)
 129                 return -1;
 130         return 0;
 131 }
 132
 133 REGISTER_TEST_COMMAND(memcpy_autotest, test_memcpy);