Function mlx5_flow_meter_find

dpdk/drivers/net/mlx5/mlx5_flow_meter.c:2024–2066

* Find meter by id. * * @param priv * Pointer to mlx5_priv. * @param meter_id * Meter id. * @param mtr_idx * Pointer to Meter index. * * @return * Pointer to the meter info found on success, NULL otherwise. */

 *   Pointer to the meter info found on success, NULL otherwise.
 */
struct mlx5_flow_meter_info *
mlx5_flow_meter_find(struct mlx5_priv *priv, uint32_t meter_id,
		uint32_t *mtr_idx)
{
	struct mlx5_legacy_flow_meter *legacy_fm;
	struct mlx5_legacy_flow_meters *fms = &priv->flow_meters;
	struct mlx5_aso_mtr *aso_mtr;
	struct mlx5_aso_mtr_pools_mng *pools_mng =
				&priv->sh->mtrmng->pools_mng;
	union mlx5_l3t_data data;
	uint16_t n_valid;

	if (priv->mtr_bulk.aso) {
		if (mtr_idx)
			*mtr_idx = meter_id;
		aso_mtr = priv->mtr_bulk.aso + meter_id;
		return &aso_mtr->fm;
	}
	if (priv->sh->meter_aso_en) {
		rte_rwlock_read_lock(&pools_mng->resize_mtrwl);
		n_valid = pools_mng->n_valid;
		rte_rwlock_read_unlock(&pools_mng->resize_mtrwl);
		if (!n_valid || !priv->mtr_idx_tbl ||
		    (mlx5_l3t_get_entry(priv->mtr_idx_tbl, meter_id, &data) ||
		    !data.dword))
			return NULL;
		if (mtr_idx)
			*mtr_idx = data.dword;
		aso_mtr = mlx5_aso_meter_by_idx(priv, data.dword);
		/* Remove reference taken by the mlx5_l3t_get_entry. */
		mlx5_l3t_clear_entry(priv->mtr_idx_tbl, meter_id);
		if (!aso_mtr || aso_mtr->state == ASO_METER_FREE)
			return NULL;
		return &aso_mtr->fm;
	}
	TAILQ_FOREACH(legacy_fm, fms, next)
		if (meter_id == legacy_fm->fm.meter_id) {
			if (mtr_idx)
				*mtr_idx = legacy_fm->idx;
			return &legacy_fm->fm;
		}
	return NULL;
}

/**
 * Find meter by index.