/**
* Verify and store value for device argument.
*
* @param[in] key
* Key argument to verify.
* @param[in] val
* Value associated with key.
* @param[in, out] conf
* Shared configuration data.
*
* @return
* 0 on success, negative errno value otherwise and rte_errno is set.
*/
static int
mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf)
{
unsigned long tmp;
errno = 0;
tmp = strtoul(val, NULL, 0);
if (errno) {
rte_errno = errno;
WARN("%s: \"%s\" is not a valid integer", key, val);
return -rte_errno;
}
if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
uint32_t ports = rte_log2_u32(conf->ports.present + 1);
if (tmp >= ports) {
ERROR("port index %lu outside range [0,%" PRIu32 ")",
tmp, ports);
return -EINVAL;
}
if (!(conf->ports.present & (1 << tmp))) {
rte_errno = EINVAL;
ERROR("invalid port index %lu", tmp);
return -rte_errno;
}
conf->ports.enabled |= 1 << tmp;
} else {
rte_errno = EINVAL;
WARN("%s: unknown parameter", key);
return -rte_errno;
}
return 0;
}
static int
test_log2(void)
{
uint32_t i, base, compare;
const uint32_t max = 0x10000;
const uint32_t step = 1;
for (i = 0; i < max; i = i + step) {
base = (uint32_t)ceilf(log2((uint32_t)i));
compare = rte_log2_u32(i);
if (base != compare) {
printf("Wrong rte_log2_u32(%x) val %x, expected %x\n",
i, compare, base);
return TEST_FAILED;
}
}
return 0;
}
