/*-
 * Copyright (c) 2018 Mellanox Technologies. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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 "opt_rss.h"
#include "opt_ratelimit.h"

#include <dev/mlx5/mlx5_en/en.h>

void
mlx5e_dim_build_cq_param(struct mlx5e_priv *priv,
    struct mlx5e_cq_param *param)
{
        struct net_dim_cq_moder prof;
        void *cqc = param->cqc;

        if (priv->params.rx_cq_moderation_mode < 2)
                return;

        switch (MLX5_GET(cqc, cqc, cq_period_mode)) {
        case MLX5_CQ_PERIOD_MODE_START_FROM_CQE:
                prof = net_dim_profile[NET_DIM_CQ_PERIOD_MODE_START_FROM_CQE]
                    [NET_DIM_DEF_PROFILE_CQE];
                MLX5_SET(cqc, cqc, cq_period, prof.usec);
                MLX5_SET(cqc, cqc, cq_max_count, prof.pkts);
                break;

        case MLX5_CQ_PERIOD_MODE_START_FROM_EQE:
                prof = net_dim_profile[NET_DIM_CQ_PERIOD_MODE_START_FROM_EQE]
                    [NET_DIM_DEF_PROFILE_EQE];
                MLX5_SET(cqc, cqc, cq_period, prof.usec);
                MLX5_SET(cqc, cqc, cq_max_count, prof.pkts);
                break;
        default:
                break;
        }
}

void
mlx5e_dim_work(struct work_struct *work)
{
        struct net_dim *dim = container_of(work, struct net_dim, work);
        struct mlx5e_rq *rq = container_of(dim, struct mlx5e_rq, dim);
        struct mlx5e_channel *c = container_of(rq, struct mlx5e_channel, rq);
        struct net_dim_cq_moder cur_profile;
        u8 profile_ix;
        u8 mode;

        /* copy current auto moderation settings and set new state */
        mtx_lock(&rq->mtx);
        profile_ix = dim->profile_ix;
        mode = dim->mode;
        dim->state = NET_DIM_START_MEASURE;
        mtx_unlock(&rq->mtx);

        /* check for invalid mode */
        if (mode == 255)
                return;

        /* get current profile */
        cur_profile = net_dim_profile[mode][profile_ix];

        /* apply LRO restrictions */
        if (c->priv->params.hw_lro_en &&
            cur_profile.pkts > MLX5E_DIM_MAX_RX_CQ_MODERATION_PKTS_WITH_LRO) {
                cur_profile.pkts = MLX5E_DIM_MAX_RX_CQ_MODERATION_PKTS_WITH_LRO;
        }

        /* modify CQ */
        mlx5_core_modify_cq_moderation(c->priv->mdev, &rq->cq.mcq,
            cur_profile.usec, cur_profile.pkts);
}