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/*
* test-bus.c
* ----------
* Test raw read/write performance across the EIM or FMC bus.
*
* Copyright (c) 2015, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the NORDUnet nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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
* HOLDER 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <sys/time.h>
#include <hal.h>
#define TEST_NUM_ROUNDS 2000000
/*
* Sanity test - can we read and write the dummy register?
*/
static int sanity(const hal_core_t *board_core)
{
uint32_t rnd = 0xdeadbeef, data;
hal_error_t err;
if (board_core == NULL) {
printf("initialization failed (is the bitstream loaded?)\n");
return 1;
}
if ((err = hal_io_write(board_core, 0xFF, (const uint8_t *) &rnd, sizeof(rnd))) != HAL_OK) {
printf("writing dummy: %s\n", hal_error_string(err));
return 1;
}
if ((err = hal_io_read(board_core, 0xFF, (uint8_t *) &data, sizeof(data))) != HAL_OK) {
printf("reading dummy: %s\n", hal_error_string(err));
return 1;
}
if (data != rnd) {
printf("Data bus fail: expected %08lx, got %08lx, diff %08lx\n",
(unsigned long) rnd, (unsigned long) data, (unsigned long) (data ^ rnd));
return 1;
}
return 0;
}
/*
* Time a test.
*/
static void _time_check(char *label, const struct timeval t0, const int err)
{
struct timeval t;
float rounds;
gettimeofday(&t, NULL);
t.tv_sec -= t0.tv_sec;
t.tv_usec -= t0.tv_usec;
if (t.tv_usec < 0) {
t.tv_usec += 1000000;
t.tv_sec -= 1;
}
rounds = (float)TEST_NUM_ROUNDS/((float)t.tv_sec + ((float)t.tv_usec / 1000000));
printf("%s%lu.%06lu seconds, %u/sec\n", label,
(unsigned long)t.tv_sec, (unsigned long)t.tv_usec, (unsigned)rounds);
}
#define time_check(_label_, _expr_) \
do { \
struct timeval _t; \
gettimeofday(&_t, NULL); \
int _err = (_expr_); \
_time_check(_label_, _t, _err); \
err |= _err; \
} while (0)
/*
* Read and write over and over again.
*/
static int test_read(const hal_core_t *board_core)
{
uint32_t i, data;
hal_error_t err;
for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
if ((err = hal_io_read(board_core, 0xFF, (uint8_t *) &data, sizeof(data))) != HAL_OK) {
printf("reading dummy: %s\n", hal_error_string(err));
return 1;
}
}
return 0;
}
static int test_write(const hal_core_t *board_core)
{
uint32_t i;
hal_error_t err;
for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
if ((err = hal_io_write(board_core, 0xFF, (const uint8_t *) &i, sizeof(i))) != HAL_OK) {
printf("writing dummy: %s\n", hal_error_string(err));
return 1;
}
}
return 0;
}
int main(void)
{
const hal_core_t *board_core = hal_core_find(NOVENA_BOARD_NAME, NULL);
int err = 0;
if (sanity(board_core) != 0)
return 1;
time_check("read ", test_read(board_core));
time_check("write ", test_write(board_core));
return err;
}
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