drivers/net/mlx5/mlx5_flow_meter.c

   1 // SPDX-License-Identifier: BSD-3-Clause
   2 /*
   3  * Copyright 2018 Mellanox Technologies, Ltd
   4  */
   5 #include <math.h>
   6
   7 #include <rte_mtr.h>
   8 #include <rte_mtr_driver.h>
   9
  10 #include "mlx5.h"
  11 #include "mlx5_flow.h"
  12
  13 /**
  14  * Callback to get MTR capabilities.
  15  *
  16  * @param[in] dev
  17  *   Pointer to Ethernet device.
  18  * @param[out] cap
  19  *   Pointer to save MTR capabilities.
  20  * @param[out] error
  21  *   Pointer to the error structure.
  22  *
  23  * @return
  24  *   0 on success, a negative errno value otherwise and rte_errno is set.
  25  */
  26 static int
  27 mlx5_flow_mtr_cap_get(struct rte_eth_dev *dev,
  28                  struct rte_mtr_capabilities *cap,
  29                  struct rte_mtr_error *error __rte_unused)
  30 {
  31         struct mlx5_priv *priv = dev->data->dev_private;
  32         struct mlx5_hca_qos_attr *qattr = &priv->config.hca_attr.qos;
  33
  34         if (!priv->mtr_en)
  35                 return -rte_mtr_error_set(error, ENOTSUP,
  36                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
  37                                           "Meter is not support");
  38         memset(cap, 0, sizeof(*cap));
  39         cap->n_max = 1 << qattr->log_max_flow_meter;
  40         cap->n_shared_max = cap->n_max;
  41         cap->identical = 1;
  42         cap->shared_identical = 1;
  43         cap->shared_n_flows_per_mtr_max = 4 << 20;
  44         /* 2M flows can share the same meter. */
  45         cap->chaining_n_mtrs_per_flow_max = 1; /* Chaining is not supported. */
  46         cap->meter_srtcm_rfc2697_n_max = qattr->srtcm_sup ? cap->n_max : 0;
  47         cap->meter_rate_max = 1ULL << 40; /* 1 Tera tokens per sec. */
  48         cap->policer_action_drop_supported = 1;
  49         cap->stats_mask = RTE_MTR_STATS_N_BYTES_DROPPED |
  50                           RTE_MTR_STATS_N_PKTS_DROPPED;
  51         return 0;
  52 }
  53
  54 static const struct rte_mtr_ops mlx5_flow_mtr_ops = {
  55         .capabilities_get = mlx5_flow_mtr_cap_get,
  56         .meter_profile_add = NULL,
  57         .meter_profile_delete = NULL,
  58         .create = NULL,
  59         .destroy = NULL,
  60         .meter_enable = NULL,
  61         .meter_disable = NULL,
  62         .meter_profile_update = NULL,
  63         .meter_dscp_table_update = NULL,
  64         .policer_actions_update = NULL,
  65         .stats_update = NULL,
  66         .stats_read = NULL,
  67 };
  68
  69 /**
  70  * Get meter operations.
  71  *
  72  * @param dev
  73  *   Pointer to Ethernet device structure.
  74  * @param arg
  75  *   Pointer to set the mtr operations.
  76  *
  77  * @return
  78  *   Always 0.
  79  */
  80 int
  81 mlx5_flow_meter_ops_get(struct rte_eth_dev *dev __rte_unused, void *arg)
  82 {
  83         *(const struct rte_mtr_ops **)arg = &mlx5_flow_mtr_ops;
  84         return 0;
  85 }