Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_meter / rte_meter.c

diff --git a/lib/librte_meter/rte_meter.c b/lib/librte_meter/rte_meter.c
new file mode 100644 (file)
index 0000000..5e2dadb
--- /dev/null
+++ b/lib/librte_meter/rte_meter.c
@@ -0,0 +1,120 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   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 Intel Corporation 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
+ *   OWNER 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 <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;
+}