ceph/src/seastar/dpdk/lib/librte_meter/rte_meter.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <inttypes.h>
   6 #include <stdio.h>
   7 #include <math.h>
   8
   9 #include <rte_common.h>
  10 #include <rte_log.h>
  11 #include <rte_cycles.h>
  12
  13 #include "rte_meter.h"
  14
  15 #ifndef RTE_METER_TB_PERIOD_MIN
  16 #define RTE_METER_TB_PERIOD_MIN      100
  17 #endif
  18
  19 static void
  20 rte_meter_get_tb_params(uint64_t hz, uint64_t rate, uint64_t *tb_period, uint64_t *tb_bytes_per_period)
  21 {
  22         double period;
  23
  24         if (rate == 0) {
  25                 *tb_bytes_per_period = 0;
  26                 *tb_period = RTE_METER_TB_PERIOD_MIN;
  27                 return;
  28         }
  29
  30         period = ((double) hz) / ((double) rate);
  31
  32         if (period >= RTE_METER_TB_PERIOD_MIN) {
  33                 *tb_bytes_per_period = 1;
  34                 *tb_period = (uint64_t) period;
  35         } else {
  36                 *tb_bytes_per_period = (uint64_t) ceil(RTE_METER_TB_PERIOD_MIN / period);
  37                 *tb_period = (hz * (*tb_bytes_per_period)) / rate;
  38         }
  39 }
  40
  41 int
  42 rte_meter_srtcm_profile_config(struct rte_meter_srtcm_profile *p,
  43         struct rte_meter_srtcm_params *params)
  44 {
  45         uint64_t hz = rte_get_tsc_hz();
  46
  47         /* Check input parameters */
  48         if ((p == NULL) ||
  49                 (params == NULL) ||
  50                 (params->cir == 0) ||
  51                 ((params->cbs == 0) && (params->ebs == 0)))
  52                 return -EINVAL;
  53
  54         /* Initialize srTCM run-time structure */
  55         p->cbs = params->cbs;
  56         p->ebs = params->ebs;
  57         rte_meter_get_tb_params(hz, params->cir, &p->cir_period,
  58                 &p->cir_bytes_per_period);
  59
  60         return 0;
  61 }
  62
  63 int
  64 rte_meter_srtcm_config(struct rte_meter_srtcm *m,
  65         struct rte_meter_srtcm_profile *p)
  66 {
  67         /* Check input parameters */
  68         if ((m == NULL) || (p == NULL))
  69                 return -EINVAL;
  70
  71         /* Initialize srTCM run-time structure */
  72         m->time = rte_get_tsc_cycles();
  73         m->tc = p->cbs;
  74         m->te = p->ebs;
  75
  76         return 0;
  77 }
  78
  79 int
  80 rte_meter_trtcm_profile_config(struct rte_meter_trtcm_profile *p,
  81         struct rte_meter_trtcm_params *params)
  82 {
  83         uint64_t hz = rte_get_tsc_hz();
  84
  85         /* Check input parameters */
  86         if ((p == NULL) ||
  87                 (params == NULL) ||
  88                 (params->cir == 0) ||
  89                 (params->pir == 0) ||
  90                 (params->pir < params->cir) ||
  91                 (params->cbs == 0) ||
  92                 (params->pbs == 0))
  93                 return -EINVAL;
  94
  95         /* Initialize trTCM run-time structure */
  96         p->cbs = params->cbs;
  97         p->pbs = params->pbs;
  98         rte_meter_get_tb_params(hz, params->cir, &p->cir_period,
  99                 &p->cir_bytes_per_period);
 100         rte_meter_get_tb_params(hz, params->pir, &p->pir_period,
 101                 &p->pir_bytes_per_period);
 102
 103         return 0;
 104 }
 105
 106 int
 107 rte_meter_trtcm_config(struct rte_meter_trtcm *m,
 108         struct rte_meter_trtcm_profile *p)
 109 {
 110         /* Check input parameters */
 111         if ((m == NULL) || (p == NULL))
 112                 return -EINVAL;
 113
 114         /* Initialize trTCM run-time structure */
 115         m->time_tc = m->time_tp = rte_get_tsc_cycles();
 116         m->tc = p->cbs;
 117         m->tp = p->pbs;
 118
 119         return 0;
 120 }
 121
 122 int __rte_experimental
 123 rte_meter_trtcm_rfc4115_profile_config(
 124         struct rte_meter_trtcm_rfc4115_profile *p,
 125         struct rte_meter_trtcm_rfc4115_params *params)
 126 {
 127         uint64_t hz = rte_get_tsc_hz();
 128
 129         /* Check input parameters */
 130         if ((p == NULL) ||
 131                 (params == NULL) ||
 132                 (params->cir != 0 && params->cbs == 0) ||
 133                 (params->eir != 0 && params->ebs == 0))
 134                 return -EINVAL;
 135
 136         /* Initialize trTCM run-time structure */
 137         p->cbs = params->cbs;
 138         p->ebs = params->ebs;
 139         rte_meter_get_tb_params(hz, params->cir, &p->cir_period,
 140                 &p->cir_bytes_per_period);
 141         rte_meter_get_tb_params(hz, params->eir, &p->eir_period,
 142                 &p->eir_bytes_per_period);
 143
 144         return 0;
 145 }
 146
 147 int __rte_experimental
 148 rte_meter_trtcm_rfc4115_config(
 149         struct rte_meter_trtcm_rfc4115 *m,
 150         struct rte_meter_trtcm_rfc4115_profile *p)
 151 {
 152         /* Check input parameters */
 153         if ((m == NULL) || (p == NULL))
 154                 return -EINVAL;
 155
 156         /* Initialize trTCM run-time structure */
 157         m->time_tc = m->time_te = rte_get_tsc_cycles();
 158         m->tc = p->cbs;
 159         m->te = p->ebs;
 160
 161         return 0;
 162 }