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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <inttypes.h>
#include <stdio.h>
#include <math.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_cycles.h>
#include "rte_meter.h"
#ifndef RTE_METER_TB_PERIOD_MIN
#define RTE_METER_TB_PERIOD_MIN 100
#endif
static void
rte_meter_get_tb_params(uint64_t hz, uint64_t rate, uint64_t *tb_period, uint64_t *tb_bytes_per_period)
{
double period = ((double) hz) / ((double) rate);
if (period >= RTE_METER_TB_PERIOD_MIN) {
*tb_bytes_per_period = 1;
*tb_period = (uint64_t) period;
} else {
*tb_bytes_per_period = (uint64_t) ceil(RTE_METER_TB_PERIOD_MIN / period);
*tb_period = (hz * (*tb_bytes_per_period)) / rate;
}
}
int
rte_meter_srtcm_config(struct rte_meter_srtcm *m, struct rte_meter_srtcm_params *params)
{
uint64_t hz;
/* Check input parameters */
if ((m == NULL) || (params == NULL)) {
return -1;
}
if ((params->cir == 0) || ((params->cbs == 0) && (params->ebs == 0))) {
return -2;
}
/* Initialize srTCM run-time structure */
hz = rte_get_tsc_hz();
m->time = rte_get_tsc_cycles();
m->tc = m->cbs = params->cbs;
m->te = m->ebs = params->ebs;
rte_meter_get_tb_params(hz, params->cir, &m->cir_period, &m->cir_bytes_per_period);
RTE_LOG(INFO, METER, "Low level srTCM config: \n"
"\tCIR period = %" PRIu64 ", CIR bytes per period = %" PRIu64 "\n",
m->cir_period, m->cir_bytes_per_period);
return 0;
}
int
rte_meter_trtcm_config(struct rte_meter_trtcm *m, struct rte_meter_trtcm_params *params)
{
uint64_t hz;
/* Check input parameters */
if ((m == NULL) || (params == NULL)) {
return -1;
}
if ((params->cir == 0) || (params->pir == 0) || (params->pir < params->cir) ||
(params->cbs == 0) || (params->pbs == 0)) {
return -2;
}
/* Initialize trTCM run-time structure */
hz = rte_get_tsc_hz();
m->time_tc = m->time_tp = rte_get_tsc_cycles();
m->tc = m->cbs = params->cbs;
m->tp = m->pbs = params->pbs;
rte_meter_get_tb_params(hz, params->cir, &m->cir_period, &m->cir_bytes_per_period);
rte_meter_get_tb_params(hz, params->pir, &m->pir_period, &m->pir_bytes_per_period);
RTE_LOG(INFO, METER, "Low level trTCM config: \n"
"\tCIR period = %" PRIu64 ", CIR bytes per period = %" PRIu64 "\n"
"\tPIR period = %" PRIu64 ", PIR bytes per period = %" PRIu64 "\n",
m->cir_period, m->cir_bytes_per_period,
m->pir_period, m->pir_bytes_per_period);
return 0;
}
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