/*
 * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/mlx5/fs.h>
#include "en.h"
#include "eswitch.h"

struct mlx5e_rq_param {
        u32                        rqc[MLX5_ST_SZ_DW(rqc)];
        struct mlx5_wq_param       wq;
};

struct mlx5e_sq_param {
        u32                        sqc[MLX5_ST_SZ_DW(sqc)];
        struct mlx5_wq_param       wq;
        u16                        max_inline;
};

struct mlx5e_cq_param {
        u32                        cqc[MLX5_ST_SZ_DW(cqc)];
        struct mlx5_wq_param       wq;
        u16                        eq_ix;
};

struct mlx5e_channel_param {
        struct mlx5e_rq_param      rq;
        struct mlx5e_sq_param      sq;
        struct mlx5e_cq_param      rx_cq;
        struct mlx5e_cq_param      tx_cq;
};

static void mlx5e_update_carrier(struct mlx5e_priv *priv)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        u8 port_state;

        port_state = mlx5_query_vport_state(mdev,
                MLX5_QUERY_VPORT_STATE_IN_OP_MOD_VNIC_VPORT, 0);

        if (port_state == VPORT_STATE_UP)
                netif_carrier_on(priv->netdev);
        else
                netif_carrier_off(priv->netdev);
}

static void mlx5e_update_carrier_work(struct work_struct *work)
{
        struct mlx5e_priv *priv = container_of(work, struct mlx5e_priv,
                                               update_carrier_work);

        mutex_lock(&priv->state_lock);
        if (test_bit(MLX5E_STATE_OPENED, &priv->state))
                mlx5e_update_carrier(priv);
        mutex_unlock(&priv->state_lock);
}

static void mlx5e_update_pport_counters(struct mlx5e_priv *priv)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        struct mlx5e_pport_stats *s = &priv->stats.pport;
        u32 *in;
        u32 *out;
        int sz = MLX5_ST_SZ_BYTES(ppcnt_reg);

        in  = mlx5_vzalloc(sz);
        out = mlx5_vzalloc(sz);
        if (!in || !out)
                goto free_out;

        MLX5_SET(ppcnt_reg, in, local_port, 1);

        MLX5_SET(ppcnt_reg, in, grp, MLX5_IEEE_802_3_COUNTERS_GROUP);
        mlx5_core_access_reg(mdev, in, sz, out,
                             sz, MLX5_REG_PPCNT, 0, 0);
        memcpy(s->IEEE_802_3_counters,
               MLX5_ADDR_OF(ppcnt_reg, out, counter_set),
               sizeof(s->IEEE_802_3_counters));

        MLX5_SET(ppcnt_reg, in, grp, MLX5_RFC_2863_COUNTERS_GROUP);
        mlx5_core_access_reg(mdev, in, sz, out,
                             sz, MLX5_REG_PPCNT, 0, 0);
        memcpy(s->RFC_2863_counters,
               MLX5_ADDR_OF(ppcnt_reg, out, counter_set),
               sizeof(s->RFC_2863_counters));

        MLX5_SET(ppcnt_reg, in, grp, MLX5_RFC_2819_COUNTERS_GROUP);
        mlx5_core_access_reg(mdev, in, sz, out,
                             sz, MLX5_REG_PPCNT, 0, 0);
        memcpy(s->RFC_2819_counters,
               MLX5_ADDR_OF(ppcnt_reg, out, counter_set),
               sizeof(s->RFC_2819_counters));

free_out:
        kvfree(in);
        kvfree(out);
}

void mlx5e_update_stats(struct mlx5e_priv *priv)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        struct mlx5e_vport_stats *s = &priv->stats.vport;
        struct mlx5e_rq_stats *rq_stats;
        struct mlx5e_sq_stats *sq_stats;
        u32 in[MLX5_ST_SZ_DW(query_vport_counter_in)];
        u32 *out;
        int outlen = MLX5_ST_SZ_BYTES(query_vport_counter_out);
        u64 tx_offload_none;
        int i, j;

        out = mlx5_vzalloc(outlen);
        if (!out)
                return;

        /* Collect firts the SW counters and then HW for consistency */
        s->rx_packets           = 0;
        s->rx_bytes             = 0;
        s->tx_packets           = 0;
        s->tx_bytes             = 0;
        s->tso_packets          = 0;
        s->tso_bytes            = 0;
        s->tx_queue_stopped     = 0;
        s->tx_queue_wake        = 0;
        s->tx_queue_dropped     = 0;
        tx_offload_none         = 0;
        s->lro_packets          = 0;
        s->lro_bytes            = 0;
        s->rx_csum_none         = 0;
        s->rx_csum_sw           = 0;
        s->rx_wqe_err           = 0;
        for (i = 0; i < priv->params.num_channels; i++) {
                rq_stats = &priv->channel[i]->rq.stats;

                s->rx_packets   += rq_stats->packets;
                s->rx_bytes     += rq_stats->bytes;
                s->lro_packets  += rq_stats->lro_packets;
                s->lro_bytes    += rq_stats->lro_bytes;
                s->rx_csum_none += rq_stats->csum_none;
                s->rx_csum_sw   += rq_stats->csum_sw;
                s->rx_wqe_err   += rq_stats->wqe_err;

                for (j = 0; j < priv->params.num_tc; j++) {
                        sq_stats = &priv->channel[i]->sq[j].stats;

                        s->tx_packets           += sq_stats->packets;
                        s->tx_bytes             += sq_stats->bytes;
                        s->tso_packets          += sq_stats->tso_packets;
                        s->tso_bytes            += sq_stats->tso_bytes;
                        s->tx_queue_stopped     += sq_stats->stopped;
                        s->tx_queue_wake        += sq_stats->wake;
                        s->tx_queue_dropped     += sq_stats->dropped;
                        tx_offload_none         += sq_stats->csum_offload_none;
                }
        }

        /* HW counters */
        memset(in, 0, sizeof(in));

        MLX5_SET(query_vport_counter_in, in, opcode,
                 MLX5_CMD_OP_QUERY_VPORT_COUNTER);
        MLX5_SET(query_vport_counter_in, in, op_mod, 0);
        MLX5_SET(query_vport_counter_in, in, other_vport, 0);

        memset(out, 0, outlen);

        if (mlx5_cmd_exec(mdev, in, sizeof(in), out, outlen))
                goto free_out;

#define MLX5_GET_CTR(p, x) \
        MLX5_GET64(query_vport_counter_out, p, x)

        s->rx_error_packets     =
                MLX5_GET_CTR(out, received_errors.packets);
        s->rx_error_bytes       =
                MLX5_GET_CTR(out, received_errors.octets);
        s->tx_error_packets     =
                MLX5_GET_CTR(out, transmit_errors.packets);
        s->tx_error_bytes       =
                MLX5_GET_CTR(out, transmit_errors.octets);

        s->rx_unicast_packets   =
                MLX5_GET_CTR(out, received_eth_unicast.packets);
        s->rx_unicast_bytes     =
                MLX5_GET_CTR(out, received_eth_unicast.octets);
        s->tx_unicast_packets   =
                MLX5_GET_CTR(out, transmitted_eth_unicast.packets);
        s->tx_unicast_bytes     =
                MLX5_GET_CTR(out, transmitted_eth_unicast.octets);

        s->rx_multicast_packets =
                MLX5_GET_CTR(out, received_eth_multicast.packets);
        s->rx_multicast_bytes   =
                MLX5_GET_CTR(out, received_eth_multicast.octets);
        s->tx_multicast_packets =
                MLX5_GET_CTR(out, transmitted_eth_multicast.packets);
        s->tx_multicast_bytes   =
                MLX5_GET_CTR(out, transmitted_eth_multicast.octets);

        s->rx_broadcast_packets =
                MLX5_GET_CTR(out, received_eth_broadcast.packets);
        s->rx_broadcast_bytes   =
                MLX5_GET_CTR(out, received_eth_broadcast.octets);
        s->tx_broadcast_packets =
                MLX5_GET_CTR(out, transmitted_eth_broadcast.packets);
        s->tx_broadcast_bytes   =
                MLX5_GET_CTR(out, transmitted_eth_broadcast.octets);

        /* Update calculated offload counters */
        s->tx_csum_offload = s->tx_packets - tx_offload_none;
        s->rx_csum_good    = s->rx_packets - s->rx_csum_none -
                               s->rx_csum_sw;

        mlx5e_update_pport_counters(priv);
free_out:
        kvfree(out);
}

static void mlx5e_update_stats_work(struct work_struct *work)
{
        struct delayed_work *dwork = to_delayed_work(work);
        struct mlx5e_priv *priv = container_of(dwork, struct mlx5e_priv,
                                               update_stats_work);
        mutex_lock(&priv->state_lock);
        if (test_bit(MLX5E_STATE_OPENED, &priv->state)) {
                mlx5e_update_stats(priv);
                schedule_delayed_work(dwork,
                                      msecs_to_jiffies(
                                              MLX5E_UPDATE_STATS_INTERVAL));
        }
        mutex_unlock(&priv->state_lock);
}

static void __mlx5e_async_event(struct mlx5e_priv *priv,
                                enum mlx5_dev_event event)
{
        switch (event) {
        case MLX5_DEV_EVENT_PORT_UP:
        case MLX5_DEV_EVENT_PORT_DOWN:
                schedule_work(&priv->update_carrier_work);
                break;

        default:
                break;
        }
}

static void mlx5e_async_event(struct mlx5_core_dev *mdev, void *vpriv,
                              enum mlx5_dev_event event, unsigned long param)
{
        struct mlx5e_priv *priv = vpriv;

        spin_lock(&priv->async_events_spinlock);
        if (test_bit(MLX5E_STATE_ASYNC_EVENTS_ENABLE, &priv->state))
                __mlx5e_async_event(priv, event);
        spin_unlock(&priv->async_events_spinlock);
}

static void mlx5e_enable_async_events(struct mlx5e_priv *priv)
{
        set_bit(MLX5E_STATE_ASYNC_EVENTS_ENABLE, &priv->state);
}

static void mlx5e_disable_async_events(struct mlx5e_priv *priv)
{
        spin_lock_irq(&priv->async_events_spinlock);
        clear_bit(MLX5E_STATE_ASYNC_EVENTS_ENABLE, &priv->state);
        spin_unlock_irq(&priv->async_events_spinlock);
}

#define MLX5E_HW2SW_MTU(hwmtu) (hwmtu - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN))
#define MLX5E_SW2HW_MTU(swmtu) (swmtu + (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN))

static int mlx5e_create_rq(struct mlx5e_channel *c,
                           struct mlx5e_rq_param *param,
                           struct mlx5e_rq *rq)
{
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;
        void *rqc = param->rqc;
        void *rqc_wq = MLX5_ADDR_OF(rqc, rqc, wq);
        int wq_sz;
        int err;
        int i;

        param->wq.db_numa_node = cpu_to_node(c->cpu);

        err = mlx5_wq_ll_create(mdev, &param->wq, rqc_wq, &rq->wq,
                                &rq->wq_ctrl);
        if (err)
                return err;

        rq->wq.db = &rq->wq.db[MLX5_RCV_DBR];

        wq_sz = mlx5_wq_ll_get_size(&rq->wq);
        rq->skb = kzalloc_node(wq_sz * sizeof(*rq->skb), GFP_KERNEL,
                               cpu_to_node(c->cpu));
        if (!rq->skb) {
                err = -ENOMEM;
                goto err_rq_wq_destroy;
        }

        rq->wqe_sz = (priv->params.lro_en) ? priv->params.lro_wqe_sz :
                                             MLX5E_SW2HW_MTU(priv->netdev->mtu);
        rq->wqe_sz = SKB_DATA_ALIGN(rq->wqe_sz + MLX5E_NET_IP_ALIGN);

        for (i = 0; i < wq_sz; i++) {
                struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(&rq->wq, i);
                u32 byte_count = rq->wqe_sz - MLX5E_NET_IP_ALIGN;

                wqe->data.lkey       = c->mkey_be;
                wqe->data.byte_count =
                        cpu_to_be32(byte_count | MLX5_HW_START_PADDING);
        }

        rq->pdev    = c->pdev;
        rq->netdev  = c->netdev;
        rq->tstamp  = &priv->tstamp;
        rq->channel = c;
        rq->ix      = c->ix;
        rq->priv    = c->priv;

        return 0;

err_rq_wq_destroy:
        mlx5_wq_destroy(&rq->wq_ctrl);

        return err;
}

static void mlx5e_destroy_rq(struct mlx5e_rq *rq)
{
        kfree(rq->skb);
        mlx5_wq_destroy(&rq->wq_ctrl);
}

static int mlx5e_enable_rq(struct mlx5e_rq *rq, struct mlx5e_rq_param *param)
{
        struct mlx5e_priv *priv = rq->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        void *in;
        void *rqc;
        void *wq;
        int inlen;
        int err;

        inlen = MLX5_ST_SZ_BYTES(create_rq_in) +
                sizeof(u64) * rq->wq_ctrl.buf.npages;
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        rqc = MLX5_ADDR_OF(create_rq_in, in, ctx);
        wq  = MLX5_ADDR_OF(rqc, rqc, wq);

        memcpy(rqc, param->rqc, sizeof(param->rqc));

        MLX5_SET(rqc,  rqc, cqn,                rq->cq.mcq.cqn);
        MLX5_SET(rqc,  rqc, state,              MLX5_RQC_STATE_RST);
        MLX5_SET(rqc,  rqc, flush_in_error_en,  1);
        MLX5_SET(wq,   wq,  log_wq_pg_sz,       rq->wq_ctrl.buf.page_shift -
                                                MLX5_ADAPTER_PAGE_SHIFT);
        MLX5_SET64(wq, wq,  dbr_addr,           rq->wq_ctrl.db.dma);

        mlx5_fill_page_array(&rq->wq_ctrl.buf,
                             (__be64 *)MLX5_ADDR_OF(wq, wq, pas));

        err = mlx5_core_create_rq(mdev, in, inlen, &rq->rqn);

        kvfree(in);

        return err;
}

static int mlx5e_modify_rq(struct mlx5e_rq *rq, int curr_state, int next_state)
{
        struct mlx5e_channel *c = rq->channel;
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        void *in;
        void *rqc;
        int inlen;
        int err;

        inlen = MLX5_ST_SZ_BYTES(modify_rq_in);
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        rqc = MLX5_ADDR_OF(modify_rq_in, in, ctx);

        MLX5_SET(modify_rq_in, in, rq_state, curr_state);
        MLX5_SET(rqc, rqc, state, next_state);

        err = mlx5_core_modify_rq(mdev, rq->rqn, in, inlen);

        kvfree(in);

        return err;
}

static void mlx5e_disable_rq(struct mlx5e_rq *rq)
{
        mlx5_core_destroy_rq(rq->priv->mdev, rq->rqn);
}

static int mlx5e_wait_for_min_rx_wqes(struct mlx5e_rq *rq)
{
        unsigned long exp_time = jiffies + msecs_to_jiffies(20000);
        struct mlx5e_channel *c = rq->channel;
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_wq_ll *wq = &rq->wq;

        while (time_before(jiffies, exp_time)) {
                if (wq->cur_sz >= priv->params.min_rx_wqes)
                        return 0;

                msleep(20);
        }

        return -ETIMEDOUT;
}

static int mlx5e_open_rq(struct mlx5e_channel *c,
                         struct mlx5e_rq_param *param,
                         struct mlx5e_rq *rq)
{
        int err;

        err = mlx5e_create_rq(c, param, rq);
        if (err)
                return err;

        err = mlx5e_enable_rq(rq, param);
        if (err)
                goto err_destroy_rq;

        err = mlx5e_modify_rq(rq, MLX5_RQC_STATE_RST, MLX5_RQC_STATE_RDY);
        if (err)
                goto err_disable_rq;

        set_bit(MLX5E_RQ_STATE_POST_WQES_ENABLE, &rq->state);
        mlx5e_send_nop(&c->sq[0], true); /* trigger mlx5e_post_rx_wqes() */

        return 0;

err_disable_rq:
        mlx5e_disable_rq(rq);
err_destroy_rq:
        mlx5e_destroy_rq(rq);

        return err;
}

static void mlx5e_close_rq(struct mlx5e_rq *rq)
{
        clear_bit(MLX5E_RQ_STATE_POST_WQES_ENABLE, &rq->state);
        napi_synchronize(&rq->channel->napi); /* prevent mlx5e_post_rx_wqes */

        mlx5e_modify_rq(rq, MLX5_RQC_STATE_RDY, MLX5_RQC_STATE_ERR);
        while (!mlx5_wq_ll_is_empty(&rq->wq))
                msleep(20);

        /* avoid destroying rq before mlx5e_poll_rx_cq() is done with it */
        napi_synchronize(&rq->channel->napi);

        mlx5e_disable_rq(rq);
        mlx5e_destroy_rq(rq);
}

static void mlx5e_free_sq_db(struct mlx5e_sq *sq)
{
        kfree(sq->wqe_info);
        kfree(sq->dma_fifo);
        kfree(sq->skb);
}

static int mlx5e_alloc_sq_db(struct mlx5e_sq *sq, int numa)
{
        int wq_sz = mlx5_wq_cyc_get_size(&sq->wq);
        int df_sz = wq_sz * MLX5_SEND_WQEBB_NUM_DS;

        sq->skb = kzalloc_node(wq_sz * sizeof(*sq->skb), GFP_KERNEL, numa);
        sq->dma_fifo = kzalloc_node(df_sz * sizeof(*sq->dma_fifo), GFP_KERNEL,
                                    numa);
        sq->wqe_info = kzalloc_node(wq_sz * sizeof(*sq->wqe_info), GFP_KERNEL,
                                    numa);

        if (!sq->skb || !sq->dma_fifo || !sq->wqe_info) {
                mlx5e_free_sq_db(sq);
                return -ENOMEM;
        }

        sq->dma_fifo_mask = df_sz - 1;

        return 0;
}

static int mlx5e_create_sq(struct mlx5e_channel *c,
                           int tc,
                           struct mlx5e_sq_param *param,
                           struct mlx5e_sq *sq)
{
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        void *sqc = param->sqc;
        void *sqc_wq = MLX5_ADDR_OF(sqc, sqc, wq);
        int txq_ix;
        int err;

        err = mlx5_alloc_map_uar(mdev, &sq->uar);
        if (err)
                return err;

        param->wq.db_numa_node = cpu_to_node(c->cpu);

        err = mlx5_wq_cyc_create(mdev, &param->wq, sqc_wq, &sq->wq,
                                 &sq->wq_ctrl);
        if (err)
                goto err_unmap_free_uar;

        sq->wq.db       = &sq->wq.db[MLX5_SND_DBR];
        sq->uar_map     = sq->uar.map;
        sq->uar_bf_map  = sq->uar.bf_map;
        sq->bf_buf_size = (1 << MLX5_CAP_GEN(mdev, log_bf_reg_size)) / 2;
        sq->max_inline  = param->max_inline;

        err = mlx5e_alloc_sq_db(sq, cpu_to_node(c->cpu));
        if (err)
                goto err_sq_wq_destroy;

        txq_ix = c->ix + tc * priv->params.num_channels;
        sq->txq = netdev_get_tx_queue(priv->netdev, txq_ix);

        sq->pdev      = c->pdev;
        sq->tstamp    = &priv->tstamp;
        sq->mkey_be   = c->mkey_be;
        sq->channel   = c;
        sq->tc        = tc;
        sq->edge      = (sq->wq.sz_m1 + 1) - MLX5_SEND_WQE_MAX_WQEBBS;
        sq->bf_budget = MLX5E_SQ_BF_BUDGET;
        priv->txq_to_sq_map[txq_ix] = sq;

        return 0;

err_sq_wq_destroy:
        mlx5_wq_destroy(&sq->wq_ctrl);

err_unmap_free_uar:
        mlx5_unmap_free_uar(mdev, &sq->uar);

        return err;
}

static void mlx5e_destroy_sq(struct mlx5e_sq *sq)
{
        struct mlx5e_channel *c = sq->channel;
        struct mlx5e_priv *priv = c->priv;

        mlx5e_free_sq_db(sq);
        mlx5_wq_destroy(&sq->wq_ctrl);
        mlx5_unmap_free_uar(priv->mdev, &sq->uar);
}

static int mlx5e_enable_sq(struct mlx5e_sq *sq, struct mlx5e_sq_param *param)
{
        struct mlx5e_channel *c = sq->channel;
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        void *in;
        void *sqc;
        void *wq;
        int inlen;
        int err;

        inlen = MLX5_ST_SZ_BYTES(create_sq_in) +
                sizeof(u64) * sq->wq_ctrl.buf.npages;
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        sqc = MLX5_ADDR_OF(create_sq_in, in, ctx);
        wq = MLX5_ADDR_OF(sqc, sqc, wq);

        memcpy(sqc, param->sqc, sizeof(param->sqc));

        MLX5_SET(sqc,  sqc, tis_num_0,          priv->tisn[sq->tc]);
        MLX5_SET(sqc,  sqc, cqn,                c->sq[sq->tc].cq.mcq.cqn);
        MLX5_SET(sqc,  sqc, state,              MLX5_SQC_STATE_RST);
        MLX5_SET(sqc,  sqc, tis_lst_sz,         1);
        MLX5_SET(sqc,  sqc, flush_in_error_en,  1);

        MLX5_SET(wq,   wq, wq_type,       MLX5_WQ_TYPE_CYCLIC);
        MLX5_SET(wq,   wq, uar_page,      sq->uar.index);
        MLX5_SET(wq,   wq, log_wq_pg_sz,  sq->wq_ctrl.buf.page_shift -
                                          MLX5_ADAPTER_PAGE_SHIFT);
        MLX5_SET64(wq, wq, dbr_addr,      sq->wq_ctrl.db.dma);

        mlx5_fill_page_array(&sq->wq_ctrl.buf,
                             (__be64 *)MLX5_ADDR_OF(wq, wq, pas));

        err = mlx5_core_create_sq(mdev, in, inlen, &sq->sqn);

        kvfree(in);

        return err;
}

static int mlx5e_modify_sq(struct mlx5e_sq *sq, int curr_state, int next_state)
{
        struct mlx5e_channel *c = sq->channel;
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        void *in;
        void *sqc;
        int inlen;
        int err;

        inlen = MLX5_ST_SZ_BYTES(modify_sq_in);
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        sqc = MLX5_ADDR_OF(modify_sq_in, in, ctx);

        MLX5_SET(modify_sq_in, in, sq_state, curr_state);
        MLX5_SET(sqc, sqc, state, next_state);

        err = mlx5_core_modify_sq(mdev, sq->sqn, in, inlen);

        kvfree(in);

        return err;
}

static void mlx5e_disable_sq(struct mlx5e_sq *sq)
{
        struct mlx5e_channel *c = sq->channel;
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        mlx5_core_destroy_sq(mdev, sq->sqn);
}

static int mlx5e_open_sq(struct mlx5e_channel *c,
                         int tc,
                         struct mlx5e_sq_param *param,
                         struct mlx5e_sq *sq)
{
        int err;

        err = mlx5e_create_sq(c, tc, param, sq);
        if (err)
                return err;

        err = mlx5e_enable_sq(sq, param);
        if (err)
                goto err_destroy_sq;

        err = mlx5e_modify_sq(sq, MLX5_SQC_STATE_RST, MLX5_SQC_STATE_RDY);
        if (err)
                goto err_disable_sq;

        set_bit(MLX5E_SQ_STATE_WAKE_TXQ_ENABLE, &sq->state);
        netdev_tx_reset_queue(sq->txq);
        netif_tx_start_queue(sq->txq);

        return 0;

err_disable_sq:
        mlx5e_disable_sq(sq);
err_destroy_sq:
        mlx5e_destroy_sq(sq);

        return err;
}

static inline void netif_tx_disable_queue(struct netdev_queue *txq)
{
        __netif_tx_lock_bh(txq);
        netif_tx_stop_queue(txq);
        __netif_tx_unlock_bh(txq);
}

static void mlx5e_close_sq(struct mlx5e_sq *sq)
{
        clear_bit(MLX5E_SQ_STATE_WAKE_TXQ_ENABLE, &sq->state);
        napi_synchronize(&sq->channel->napi); /* prevent netif_tx_wake_queue */
        netif_tx_disable_queue(sq->txq);

        /* ensure hw is notified of all pending wqes */
        if (mlx5e_sq_has_room_for(sq, 1))
                mlx5e_send_nop(sq, true);

        mlx5e_modify_sq(sq, MLX5_SQC_STATE_RDY, MLX5_SQC_STATE_ERR);
        while (sq->cc != sq->pc) /* wait till sq is empty */
                msleep(20);

        /* avoid destroying sq before mlx5e_poll_tx_cq() is done with it */
        napi_synchronize(&sq->channel->napi);

        mlx5e_disable_sq(sq);
        mlx5e_destroy_sq(sq);
}

static int mlx5e_create_cq(struct mlx5e_channel *c,
                           struct mlx5e_cq_param *param,
                           struct mlx5e_cq *cq)
{
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;
        struct mlx5_core_cq *mcq = &cq->mcq;
        int eqn_not_used;
        unsigned int irqn;
        int err;
        u32 i;

        param->wq.buf_numa_node = cpu_to_node(c->cpu);
        param->wq.db_numa_node  = cpu_to_node(c->cpu);
        param->eq_ix   = c->ix;

        err = mlx5_cqwq_create(mdev, &param->wq, param->cqc, &cq->wq,
                               &cq->wq_ctrl);
        if (err)
                return err;

        mlx5_vector2eqn(mdev, param->eq_ix, &eqn_not_used, &irqn);

        cq->napi        = &c->napi;

        mcq->cqe_sz     = 64;
        mcq->set_ci_db  = cq->wq_ctrl.db.db;
        mcq->arm_db     = cq->wq_ctrl.db.db + 1;
        *mcq->set_ci_db = 0;
        *mcq->arm_db    = 0;
        mcq->vector     = param->eq_ix;
        mcq->comp       = mlx5e_completion_event;
        mcq->event      = mlx5e_cq_error_event;
        mcq->irqn       = irqn;
        mcq->uar        = &priv->cq_uar;

        for (i = 0; i < mlx5_cqwq_get_size(&cq->wq); i++) {
                struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(&cq->wq, i);

                cqe->op_own = 0xf1;
        }

        cq->channel = c;
        cq->priv = priv;

        return 0;
}

static void mlx5e_destroy_cq(struct mlx5e_cq *cq)
{
        mlx5_wq_destroy(&cq->wq_ctrl);
}

static int mlx5e_enable_cq(struct mlx5e_cq *cq, struct mlx5e_cq_param *param)
{
        struct mlx5e_priv *priv = cq->priv;
        struct mlx5_core_dev *mdev = priv->mdev;
        struct mlx5_core_cq *mcq = &cq->mcq;

        void *in;
        void *cqc;
        int inlen;
        unsigned int irqn_not_used;
        int eqn;
        int err;

        inlen = MLX5_ST_SZ_BYTES(create_cq_in) +
                sizeof(u64) * cq->wq_ctrl.buf.npages;
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);

        memcpy(cqc, param->cqc, sizeof(param->cqc));

        mlx5_fill_page_array(&cq->wq_ctrl.buf,
                             (__be64 *)MLX5_ADDR_OF(create_cq_in, in, pas));

        mlx5_vector2eqn(mdev, param->eq_ix, &eqn, &irqn_not_used);

        MLX5_SET(cqc,   cqc, c_eqn,         eqn);
        MLX5_SET(cqc,   cqc, uar_page,      mcq->uar->index);
        MLX5_SET(cqc,   cqc, log_page_size, cq->wq_ctrl.buf.page_shift -
                                            MLX5_ADAPTER_PAGE_SHIFT);
        MLX5_SET64(cqc, cqc, dbr_addr,      cq->wq_ctrl.db.dma);

        err = mlx5_core_create_cq(mdev, mcq, in, inlen);

        kvfree(in);

        if (err)
                return err;

        mlx5e_cq_arm(cq);

        return 0;
}

static void mlx5e_disable_cq(struct mlx5e_cq *cq)
{
        struct mlx5e_priv *priv = cq->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        mlx5_core_destroy_cq(mdev, &cq->mcq);
}

static int mlx5e_open_cq(struct mlx5e_channel *c,
                         struct mlx5e_cq_param *param,
                         struct mlx5e_cq *cq,
                         u16 moderation_usecs,
                         u16 moderation_frames)
{
        int err;
        struct mlx5e_priv *priv = c->priv;
        struct mlx5_core_dev *mdev = priv->mdev;

        err = mlx5e_create_cq(c, param, cq);
        if (err)
                return err;

        err = mlx5e_enable_cq(cq, param);
        if (err)
                goto err_destroy_cq;

        err = mlx5_core_modify_cq_moderation(mdev, &cq->mcq,
                                             moderation_usecs,
                                             moderation_frames);
        if (err)
                goto err_destroy_cq;

        return 0;

err_destroy_cq:
        mlx5e_destroy_cq(cq);

        return err;
}

static void mlx5e_close_cq(struct mlx5e_cq *cq)
{
        mlx5e_disable_cq(cq);
        mlx5e_destroy_cq(cq);
}

static int mlx5e_get_cpu(struct mlx5e_priv *priv, int ix)
{
        return cpumask_first(priv->mdev->priv.irq_info[ix].mask);
}

static int mlx5e_open_tx_cqs(struct mlx5e_channel *c,
                             struct mlx5e_channel_param *cparam)
{
        struct mlx5e_priv *priv = c->priv;
        int err;
        int tc;

        for (tc = 0; tc < c->num_tc; tc++) {
                err = mlx5e_open_cq(c, &cparam->tx_cq, &c->sq[tc].cq,
                                    priv->params.tx_cq_moderation_usec,
                                    priv->params.tx_cq_moderation_pkts);
                if (err)
                        goto err_close_tx_cqs;
        }

        return 0;

err_close_tx_cqs:
        for (tc--; tc >= 0; tc--)
                mlx5e_close_cq(&c->sq[tc].cq);

        return err;
}

static void mlx5e_close_tx_cqs(struct mlx5e_channel *c)
{
        int tc;

        for (tc = 0; tc < c->num_tc; tc++)
                mlx5e_close_cq(&c->sq[tc].cq);
}

static int mlx5e_open_sqs(struct mlx5e_channel *c,
                          struct mlx5e_channel_param *cparam)
{
        int err;
        int tc;

        for (tc = 0; tc < c->num_tc; tc++) {
                err = mlx5e_open_sq(c, tc, &cparam->sq, &c->sq[tc]);
                if (err)
                        goto err_close_sqs;
        }

        return 0;

err_close_sqs:
        for (tc--; tc >= 0; tc--)
                mlx5e_close_sq(&c->sq[tc]);

        return err;
}

static void mlx5e_close_sqs(struct mlx5e_channel *c)
{
        int tc;

        for (tc = 0; tc < c->num_tc; tc++)
                mlx5e_close_sq(&c->sq[tc]);
}

static void mlx5e_build_channeltc_to_txq_map(struct mlx5e_priv *priv, int ix)
{
        int i;

        for (i = 0; i < MLX5E_MAX_NUM_TC; i++)
                priv->channeltc_to_txq_map[ix][i] =
                        ix + i * priv->params.num_channels;
}

static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix,
                              struct mlx5e_channel_param *cparam,
                              struct mlx5e_channel **cp)
{
        struct net_device *netdev = priv->netdev;
        int cpu = mlx5e_get_cpu(priv, ix);
        struct mlx5e_channel *c;
        int err;

        c = kzalloc_node(sizeof(*c), GFP_KERNEL, cpu_to_node(cpu));
        if (!c)
                return -ENOMEM;

        c->priv     = priv;
        c->ix       = ix;
        c->cpu      = cpu;
        c->pdev     = &priv->mdev->pdev->dev;
        c->netdev   = priv->netdev;
        c->mkey_be  = cpu_to_be32(priv->mr.key);
        c->num_tc   = priv->params.num_tc;

        mlx5e_build_channeltc_to_txq_map(priv, ix);

        netif_napi_add(netdev, &c->napi, mlx5e_napi_poll, 64);

        err = mlx5e_open_tx_cqs(c, cparam);
        if (err)
                goto err_napi_del;

        err = mlx5e_open_cq(c, &cparam->rx_cq, &c->rq.cq,
                            priv->params.rx_cq_moderation_usec,
                            priv->params.rx_cq_moderation_pkts);
        if (err)
                goto err_close_tx_cqs;

        napi_enable(&c->napi);

        err = mlx5e_open_sqs(c, cparam);
        if (err)
                goto err_disable_napi;

        err = mlx5e_open_rq(c, &cparam->rq, &c->rq);
        if (err)

                goto err_close_sqs;

        netif_set_xps_queue(netdev, get_cpu_mask(c->cpu), ix);
        *cp = c;

        return 0;

err_close_sqs:
        mlx5e_close_sqs(c);

err_disable_napi:
        napi_disable(&c->napi);
        mlx5e_close_cq(&c->rq.cq);

err_close_tx_cqs:
        mlx5e_close_tx_cqs(c);

err_napi_del:
        netif_napi_del(&c->napi);
        napi_hash_del(&c->napi);
        kfree(c);

        return err;
}

static void mlx5e_close_channel(struct mlx5e_channel *c)
{
        mlx5e_close_rq(&c->rq);
        mlx5e_close_sqs(c);
        napi_disable(&c->napi);
        mlx5e_close_cq(&c->rq.cq);
        mlx5e_close_tx_cqs(c);
        netif_napi_del(&c->napi);

        napi_hash_del(&c->napi);
        synchronize_rcu();

        kfree(c);
}

static void mlx5e_build_rq_param(struct mlx5e_priv *priv,
                                 struct mlx5e_rq_param *param)
{
        void *rqc = param->rqc;
        void *wq = MLX5_ADDR_OF(rqc, rqc, wq);

        MLX5_SET(wq, wq, wq_type,          MLX5_WQ_TYPE_LINKED_LIST);
        MLX5_SET(wq, wq, end_padding_mode, MLX5_WQ_END_PAD_MODE_ALIGN);
        MLX5_SET(wq, wq, log_wq_stride,    ilog2(sizeof(struct mlx5e_rx_wqe)));
        MLX5_SET(wq, wq, log_wq_sz,        priv->params.log_rq_size);
        MLX5_SET(wq, wq, pd,               priv->pdn);

        param->wq.buf_numa_node = dev_to_node(&priv->mdev->pdev->dev);
        param->wq.linear = 1;
}

static void mlx5e_build_sq_param(struct mlx5e_priv *priv,
                                 struct mlx5e_sq_param *param)
{
        void *sqc = param->sqc;
        void *wq = MLX5_ADDR_OF(sqc, sqc, wq);

        MLX5_SET(wq, wq, log_wq_sz,     priv->params.log_sq_size);
        MLX5_SET(wq, wq, log_wq_stride, ilog2(MLX5_SEND_WQE_BB));
        MLX5_SET(wq, wq, pd,            priv->pdn);

        param->wq.buf_numa_node = dev_to_node(&priv->mdev->pdev->dev);
        param->max_inline = priv->params.tx_max_inline;
}

static void mlx5e_build_common_cq_param(struct mlx5e_priv *priv,
                                        struct mlx5e_cq_param *param)
{
        void *cqc = param->cqc;

        MLX5_SET(cqc, cqc, uar_page, priv->cq_uar.index);
}

static void mlx5e_build_rx_cq_param(struct mlx5e_priv *priv,
                                    struct mlx5e_cq_param *param)
{
        void *cqc = param->cqc;

        MLX5_SET(cqc, cqc, log_cq_size,  priv->params.log_rq_size);

        mlx5e_build_common_cq_param(priv, param);
}

static void mlx5e_build_tx_cq_param(struct mlx5e_priv *priv,
                                    struct mlx5e_cq_param *param)
{
        void *cqc = param->cqc;

        MLX5_SET(cqc, cqc, log_cq_size,  priv->params.log_sq_size);

        mlx5e_build_common_cq_param(priv, param);
}

static void mlx5e_build_channel_param(struct mlx5e_priv *priv,
                                      struct mlx5e_channel_param *cparam)
{
        memset(cparam, 0, sizeof(*cparam));

        mlx5e_build_rq_param(priv, &cparam->rq);
        mlx5e_build_sq_param(priv, &cparam->sq);
        mlx5e_build_rx_cq_param(priv, &cparam->rx_cq);
        mlx5e_build_tx_cq_param(priv, &cparam->tx_cq);
}

static int mlx5e_open_channels(struct mlx5e_priv *priv)
{
        struct mlx5e_channel_param cparam;
        int nch = priv->params.num_channels;
        int err = -ENOMEM;
        int i;
        int j;

        priv->channel = kcalloc(nch, sizeof(struct mlx5e_channel *),
                                GFP_KERNEL);

        priv->txq_to_sq_map = kcalloc(nch * priv->params.num_tc,
                                      sizeof(struct mlx5e_sq *), GFP_KERNEL);

        if (!priv->channel || !priv->txq_to_sq_map)
                goto err_free_txq_to_sq_map;

        mlx5e_build_channel_param(priv, &cparam);
        for (i = 0; i < nch; i++) {
                err = mlx5e_open_channel(priv, i, &cparam, &priv->channel[i]);
                if (err)
                        goto err_close_channels;
        }

        for (j = 0; j < nch; j++) {
                err = mlx5e_wait_for_min_rx_wqes(&priv->channel[j]->rq);
                if (err)
                        goto err_close_channels;
        }

        return 0;

err_close_channels:
        for (i--; i >= 0; i--)
                mlx5e_close_channel(priv->channel[i]);

err_free_txq_to_sq_map:
        kfree(priv->txq_to_sq_map);
        kfree(priv->channel);

        return err;
}

static void mlx5e_close_channels(struct mlx5e_priv *priv)
{
        int i;

        for (i = 0; i < priv->params.num_channels; i++)
                mlx5e_close_channel(priv->channel[i]);

        kfree(priv->txq_to_sq_map);
        kfree(priv->channel);
}

static int mlx5e_rx_hash_fn(int hfunc)
{
        return (hfunc == ETH_RSS_HASH_TOP) ?
               MLX5_RX_HASH_FN_TOEPLITZ :
               MLX5_RX_HASH_FN_INVERTED_XOR8;
}

static int mlx5e_bits_invert(unsigned long a, int size)
{
        int inv = 0;
        int i;

        for (i = 0; i < size; i++)
                inv |= (test_bit(size - i - 1, &a) ? 1 : 0) << i;

        return inv;
}

static void mlx5e_fill_indir_rqt_rqns(struct mlx5e_priv *priv, void *rqtc)
{
        int i;

        for (i = 0; i < MLX5E_INDIR_RQT_SIZE; i++) {
                int ix = i;

                if (priv->params.rss_hfunc == ETH_RSS_HASH_XOR)
                        ix = mlx5e_bits_invert(i, MLX5E_LOG_INDIR_RQT_SIZE);

                ix = priv->params.indirection_rqt[ix];
                MLX5_SET(rqtc, rqtc, rq_num[i],
                         test_bit(MLX5E_STATE_OPENED, &priv->state) ?
                         priv->channel[ix]->rq.rqn :
                         priv->drop_rq.rqn);
        }
}

static void mlx5e_fill_rqt_rqns(struct mlx5e_priv *priv, void *rqtc,
                                enum mlx5e_rqt_ix rqt_ix)
{

        switch (rqt_ix) {
        case MLX5E_INDIRECTION_RQT:
                mlx5e_fill_indir_rqt_rqns(priv, rqtc);

                break;

        default: /* MLX5E_SINGLE_RQ_RQT */
                MLX5_SET(rqtc, rqtc, rq_num[0],
                         test_bit(MLX5E_STATE_OPENED, &priv->state) ?
                         priv->channel[0]->rq.rqn :
                         priv->drop_rq.rqn);

                break;
        }
}

static int mlx5e_create_rqt(struct mlx5e_priv *priv, enum mlx5e_rqt_ix rqt_ix)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        u32 *in;
        void *rqtc;
        int inlen;
        int sz;
        int err;

        sz = (rqt_ix == MLX5E_SINGLE_RQ_RQT) ? 1 : MLX5E_INDIR_RQT_SIZE;

        inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + sizeof(u32) * sz;
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        rqtc = MLX5_ADDR_OF(create_rqt_in, in, rqt_context);

        MLX5_SET(rqtc, rqtc, rqt_actual_size, sz);
        MLX5_SET(rqtc, rqtc, rqt_max_size, sz);

        mlx5e_fill_rqt_rqns(priv, rqtc, rqt_ix);

        err = mlx5_core_create_rqt(mdev, in, inlen, &priv->rqtn[rqt_ix]);

        kvfree(in);

        return err;
}

int mlx5e_redirect_rqt(struct mlx5e_priv *priv, enum mlx5e_rqt_ix rqt_ix)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        u32 *in;
        void *rqtc;
        int inlen;
        int sz;
        int err;

        sz = (rqt_ix == MLX5E_SINGLE_RQ_RQT) ? 1 : MLX5E_INDIR_RQT_SIZE;

        inlen = MLX5_ST_SZ_BYTES(modify_rqt_in) + sizeof(u32) * sz;
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        rqtc = MLX5_ADDR_OF(modify_rqt_in, in, ctx);

        MLX5_SET(rqtc, rqtc, rqt_actual_size, sz);

        mlx5e_fill_rqt_rqns(priv, rqtc, rqt_ix);

        MLX5_SET(modify_rqt_in, in, bitmask.rqn_list, 1);

        err = mlx5_core_modify_rqt(mdev, priv->rqtn[rqt_ix], in, inlen);

        kvfree(in);

        return err;
}

static void mlx5e_destroy_rqt(struct mlx5e_priv *priv, enum mlx5e_rqt_ix rqt_ix)
{
        mlx5_core_destroy_rqt(priv->mdev, priv->rqtn[rqt_ix]);
}

static void mlx5e_redirect_rqts(struct mlx5e_priv *priv)
{
        mlx5e_redirect_rqt(priv, MLX5E_INDIRECTION_RQT);
        mlx5e_redirect_rqt(priv, MLX5E_SINGLE_RQ_RQT);
}

static void mlx5e_build_tir_ctx_lro(void *tirc, struct mlx5e_priv *priv)
{
        if (!priv->params.lro_en)
                return;

#define ROUGH_MAX_L2_L3_HDR_SZ 256

        MLX5_SET(tirc, tirc, lro_enable_mask,
                 MLX5_TIRC_LRO_ENABLE_MASK_IPV4_LRO |
                 MLX5_TIRC_LRO_ENABLE_MASK_IPV6_LRO);
        MLX5_SET(tirc, tirc, lro_max_ip_payload_size,
                 (priv->params.lro_wqe_sz -
                  ROUGH_MAX_L2_L3_HDR_SZ) >> 8);
        MLX5_SET(tirc, tirc, lro_timeout_period_usecs,
                 MLX5_CAP_ETH(priv->mdev,
                              lro_timer_supported_periods[2]));
}

void mlx5e_build_tir_ctx_hash(void *tirc, struct mlx5e_priv *priv)
{
        MLX5_SET(tirc, tirc, rx_hash_fn,
                 mlx5e_rx_hash_fn(priv->params.rss_hfunc));
        if (priv->params.rss_hfunc == ETH_RSS_HASH_TOP) {
                void *rss_key = MLX5_ADDR_OF(tirc, tirc,
                                             rx_hash_toeplitz_key);
                size_t len = MLX5_FLD_SZ_BYTES(tirc,
                                               rx_hash_toeplitz_key);

                MLX5_SET(tirc, tirc, rx_hash_symmetric, 1);
                memcpy(rss_key, priv->params.toeplitz_hash_key, len);
        }
}

static int mlx5e_modify_tirs_lro(struct mlx5e_priv *priv)
{
        struct mlx5_core_dev *mdev = priv->mdev;

        void *in;
        void *tirc;
        int inlen;
        int err;
        int tt;

        inlen = MLX5_ST_SZ_BYTES(modify_tir_in);
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        MLX5_SET(modify_tir_in, in, bitmask.lro, 1);
        tirc = MLX5_ADDR_OF(modify_tir_in, in, ctx);

        mlx5e_build_tir_ctx_lro(tirc, priv);

        for (tt = 0; tt < MLX5E_NUM_TT; tt++) {
                err = mlx5_core_modify_tir(mdev, priv->tirn[tt], in, inlen);
                if (err)
                        break;
        }

        kvfree(in);

        return err;
}

static int mlx5e_refresh_tir_self_loopback_enable(struct mlx5_core_dev *mdev,
                                                  u32 tirn)
{
        void *in;
        int inlen;
        int err;

        inlen = MLX5_ST_SZ_BYTES(modify_tir_in);
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        MLX5_SET(modify_tir_in, in, bitmask.self_lb_en, 1);

        err = mlx5_core_modify_tir(mdev, tirn, in, inlen);

        kvfree(in);

        return err;
}

static int mlx5e_refresh_tirs_self_loopback_enable(struct mlx5e_priv *priv)
{
        int err;
        int i;

        for (i = 0; i < MLX5E_NUM_TT; i++) {
                err = mlx5e_refresh_tir_self_loopback_enable(priv->mdev,
                                                             priv->tirn[i]);
                if (err)
                        return err;
        }

        return 0;
}

static int mlx5e_set_dev_port_mtu(struct net_device *netdev)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        struct mlx5_core_dev *mdev = priv->mdev;
        int hw_mtu;
        int err;

        err = mlx5_set_port_mtu(mdev, MLX5E_SW2HW_MTU(netdev->mtu), 1);
        if (err)
                return err;

        mlx5_query_port_oper_mtu(mdev, &hw_mtu, 1);

        if (MLX5E_HW2SW_MTU(hw_mtu) != netdev->mtu)
                netdev_warn(netdev, "%s: Port MTU %d is different than netdev mtu %d\n",
                            __func__, MLX5E_HW2SW_MTU(hw_mtu), netdev->mtu);

        netdev->mtu = MLX5E_HW2SW_MTU(hw_mtu);
        return 0;
}

int mlx5e_open_locked(struct net_device *netdev)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        int num_txqs;
        int err;

        set_bit(MLX5E_STATE_OPENED, &priv->state);

        num_txqs = priv->params.num_channels * priv->params.num_tc;
        netif_set_real_num_tx_queues(netdev, num_txqs);
        netif_set_real_num_rx_queues(netdev, priv->params.num_channels);

        err = mlx5e_set_dev_port_mtu(netdev);
        if (err)
                goto err_clear_state_opened_flag;

        err = mlx5e_open_channels(priv);
        if (err) {
                netdev_err(netdev, "%s: mlx5e_open_channels failed, %d\n",
                           __func__, err);
                goto err_clear_state_opened_flag;
        }

        err = mlx5e_refresh_tirs_self_loopback_enable(priv);
        if (err) {
                netdev_err(netdev, "%s: mlx5e_refresh_tirs_self_loopback_enable failed, %d\n",
                           __func__, err);
                goto err_close_channels;
        }

        mlx5e_update_carrier(priv);
        mlx5e_redirect_rqts(priv);
        mlx5e_timestamp_init(priv);

        schedule_delayed_work(&priv->update_stats_work, 0);

        return 0;

err_close_channels:
        mlx5e_close_channels(priv);
err_clear_state_opened_flag:
        clear_bit(MLX5E_STATE_OPENED, &priv->state);
        return err;
}

static int mlx5e_open(struct net_device *netdev)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        int err;

        mutex_lock(&priv->state_lock);
        err = mlx5e_open_locked(netdev);
        mutex_unlock(&priv->state_lock);

        return err;
}

int mlx5e_close_locked(struct net_device *netdev)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);

        /* May already be CLOSED in case a previous configuration operation
         * (e.g RX/TX queue size change) that involves close&open failed.
         */
        if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
                return 0;

        clear_bit(MLX5E_STATE_OPENED, &priv->state);

        mlx5e_timestamp_cleanup(priv);
        mlx5e_redirect_rqts(priv);
        netif_carrier_off(priv->netdev);
        mlx5e_close_channels(priv);

        return 0;
}

static int mlx5e_close(struct net_device *netdev)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        int err;

        mutex_lock(&priv->state_lock);
        err = mlx5e_close_locked(netdev);
        mutex_unlock(&priv->state_lock);

        return err;
}

static int mlx5e_create_drop_rq(struct mlx5e_priv *priv,
                                struct mlx5e_rq *rq,
                                struct mlx5e_rq_param *param)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        void *rqc = param->rqc;
        void *rqc_wq = MLX5_ADDR_OF(rqc, rqc, wq);
        int err;

        param->wq.db_numa_node = param->wq.buf_numa_node;

        err = mlx5_wq_ll_create(mdev, &param->wq, rqc_wq, &rq->wq,
                                &rq->wq_ctrl);
        if (err)
                return err;

        rq->priv = priv;

        return 0;
}

static int mlx5e_create_drop_cq(struct mlx5e_priv *priv,
                                struct mlx5e_cq *cq,
                                struct mlx5e_cq_param *param)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        struct mlx5_core_cq *mcq = &cq->mcq;
        int eqn_not_used;
        unsigned int irqn;
        int err;

        err = mlx5_cqwq_create(mdev, &param->wq, param->cqc, &cq->wq,
                               &cq->wq_ctrl);
        if (err)
                return err;

        mlx5_vector2eqn(mdev, param->eq_ix, &eqn_not_used, &irqn);

        mcq->cqe_sz     = 64;
        mcq->set_ci_db  = cq->wq_ctrl.db.db;
        mcq->arm_db     = cq->wq_ctrl.db.db + 1;
        *mcq->set_ci_db = 0;
        *mcq->arm_db    = 0;
        mcq->vector     = param->eq_ix;
        mcq->comp       = mlx5e_completion_event;
        mcq->event      = mlx5e_cq_error_event;
        mcq->irqn       = irqn;
        mcq->uar        = &priv->cq_uar;

        cq->priv = priv;

        return 0;
}

static int mlx5e_open_drop_rq(struct mlx5e_priv *priv)
{
        struct mlx5e_cq_param cq_param;
        struct mlx5e_rq_param rq_param;
        struct mlx5e_rq *rq = &priv->drop_rq;
        struct mlx5e_cq *cq = &priv->drop_rq.cq;
        int err;

        memset(&cq_param, 0, sizeof(cq_param));
        memset(&rq_param, 0, sizeof(rq_param));
        mlx5e_build_rx_cq_param(priv, &cq_param);
        mlx5e_build_rq_param(priv, &rq_param);

        err = mlx5e_create_drop_cq(priv, cq, &cq_param);
        if (err)
                return err;

        err = mlx5e_enable_cq(cq, &cq_param);
        if (err)
                goto err_destroy_cq;

        err = mlx5e_create_drop_rq(priv, rq, &rq_param);
        if (err)
                goto err_disable_cq;

        err = mlx5e_enable_rq(rq, &rq_param);
        if (err)
                goto err_destroy_rq;

        return 0;

err_destroy_rq:
        mlx5e_destroy_rq(&priv->drop_rq);

err_disable_cq:
        mlx5e_disable_cq(&priv->drop_rq.cq);

err_destroy_cq:
        mlx5e_destroy_cq(&priv->drop_rq.cq);

        return err;
}

static void mlx5e_close_drop_rq(struct mlx5e_priv *priv)
{
        mlx5e_disable_rq(&priv->drop_rq);
        mlx5e_destroy_rq(&priv->drop_rq);
        mlx5e_disable_cq(&priv->drop_rq.cq);
        mlx5e_destroy_cq(&priv->drop_rq.cq);
}

static int mlx5e_create_tis(struct mlx5e_priv *priv, int tc)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        u32 in[MLX5_ST_SZ_DW(create_tis_in)];
        void *tisc = MLX5_ADDR_OF(create_tis_in, in, ctx);

        memset(in, 0, sizeof(in));

        MLX5_SET(tisc, tisc, prio,  tc);
        MLX5_SET(tisc, tisc, transport_domain, priv->tdn);

        return mlx5_core_create_tis(mdev, in, sizeof(in), &priv->tisn[tc]);
}

static void mlx5e_destroy_tis(struct mlx5e_priv *priv, int tc)
{
        mlx5_core_destroy_tis(priv->mdev, priv->tisn[tc]);
}

static int mlx5e_create_tises(struct mlx5e_priv *priv)
{
        int err;
        int tc;

        for (tc = 0; tc < priv->params.num_tc; tc++) {
                err = mlx5e_create_tis(priv, tc);
                if (err)
                        goto err_close_tises;
        }

        return 0;

err_close_tises:
        for (tc--; tc >= 0; tc--)
                mlx5e_destroy_tis(priv, tc);

        return err;
}

static void mlx5e_destroy_tises(struct mlx5e_priv *priv)
{
        int tc;

        for (tc = 0; tc < priv->params.num_tc; tc++)
                mlx5e_destroy_tis(priv, tc);
}

static void mlx5e_build_tir_ctx(struct mlx5e_priv *priv, u32 *tirc, int tt)
{
        void *hfso = MLX5_ADDR_OF(tirc, tirc, rx_hash_field_selector_outer);

        MLX5_SET(tirc, tirc, transport_domain, priv->tdn);

#define MLX5_HASH_IP            (MLX5_HASH_FIELD_SEL_SRC_IP   |\
                                 MLX5_HASH_FIELD_SEL_DST_IP)

#define MLX5_HASH_IP_L4PORTS    (MLX5_HASH_FIELD_SEL_SRC_IP   |\
                                 MLX5_HASH_FIELD_SEL_DST_IP   |\
                                 MLX5_HASH_FIELD_SEL_L4_SPORT |\
                                 MLX5_HASH_FIELD_SEL_L4_DPORT)

#define MLX5_HASH_IP_IPSEC_SPI  (MLX5_HASH_FIELD_SEL_SRC_IP   |\
                                 MLX5_HASH_FIELD_SEL_DST_IP   |\
                                 MLX5_HASH_FIELD_SEL_IPSEC_SPI)

        mlx5e_build_tir_ctx_lro(tirc, priv);

        MLX5_SET(tirc, tirc, disp_type, MLX5_TIRC_DISP_TYPE_INDIRECT);

        switch (tt) {
        case MLX5E_TT_ANY:
                MLX5_SET(tirc, tirc, indirect_table,
                         priv->rqtn[MLX5E_SINGLE_RQ_RQT]);
                MLX5_SET(tirc, tirc, rx_hash_fn, MLX5_RX_HASH_FN_INVERTED_XOR8);
                break;
        default:
                MLX5_SET(tirc, tirc, indirect_table,
                         priv->rqtn[MLX5E_INDIRECTION_RQT]);
                mlx5e_build_tir_ctx_hash(tirc, priv);
                break;
        }

        switch (tt) {
        case MLX5E_TT_IPV4_TCP:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV4);
                MLX5_SET(rx_hash_field_select, hfso, l4_prot_type,
                         MLX5_L4_PROT_TYPE_TCP);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_L4PORTS);
                break;

        case MLX5E_TT_IPV6_TCP:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV6);
                MLX5_SET(rx_hash_field_select, hfso, l4_prot_type,
                         MLX5_L4_PROT_TYPE_TCP);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_L4PORTS);
                break;

        case MLX5E_TT_IPV4_UDP:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV4);
                MLX5_SET(rx_hash_field_select, hfso, l4_prot_type,
                         MLX5_L4_PROT_TYPE_UDP);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_L4PORTS);
                break;

        case MLX5E_TT_IPV6_UDP:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV6);
                MLX5_SET(rx_hash_field_select, hfso, l4_prot_type,
                         MLX5_L4_PROT_TYPE_UDP);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_L4PORTS);
                break;

        case MLX5E_TT_IPV4_IPSEC_AH:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV4);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_IPSEC_SPI);
                break;

        case MLX5E_TT_IPV6_IPSEC_AH:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV6);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_IPSEC_SPI);
                break;

        case MLX5E_TT_IPV4_IPSEC_ESP:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV4);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_IPSEC_SPI);
                break;

        case MLX5E_TT_IPV6_IPSEC_ESP:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV6);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP_IPSEC_SPI);
                break;

        case MLX5E_TT_IPV4:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV4);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP);
                break;

        case MLX5E_TT_IPV6:
                MLX5_SET(rx_hash_field_select, hfso, l3_prot_type,
                         MLX5_L3_PROT_TYPE_IPV6);
                MLX5_SET(rx_hash_field_select, hfso, selected_fields,
                         MLX5_HASH_IP);
                break;
        }
}

static int mlx5e_create_tir(struct mlx5e_priv *priv, int tt)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        u32 *in;
        void *tirc;
        int inlen;
        int err;

        inlen = MLX5_ST_SZ_BYTES(create_tir_in);
        in = mlx5_vzalloc(inlen);
        if (!in)
                return -ENOMEM;

        tirc = MLX5_ADDR_OF(create_tir_in, in, ctx);

        mlx5e_build_tir_ctx(priv, tirc, tt);

        err = mlx5_core_create_tir(mdev, in, inlen, &priv->tirn[tt]);

        kvfree(in);

        return err;
}

static void mlx5e_destroy_tir(struct mlx5e_priv *priv, int tt)
{
        mlx5_core_destroy_tir(priv->mdev, priv->tirn[tt]);
}

static int mlx5e_create_tirs(struct mlx5e_priv *priv)
{
        int err;
        int i;

        for (i = 0; i < MLX5E_NUM_TT; i++) {
                err = mlx5e_create_tir(priv, i);
                if (err)
                        goto err_destroy_tirs;
        }

        return 0;

err_destroy_tirs:
        for (i--; i >= 0; i--)
                mlx5e_destroy_tir(priv, i);

        return err;
}

static void mlx5e_destroy_tirs(struct mlx5e_priv *priv)
{
        int i;

        for (i = 0; i < MLX5E_NUM_TT; i++)
                mlx5e_destroy_tir(priv, i);
}

static struct rtnl_link_stats64 *
mlx5e_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5e_vport_stats *vstats = &priv->stats.vport;

        stats->rx_packets = vstats->rx_packets;
        stats->rx_bytes   = vstats->rx_bytes;
        stats->tx_packets = vstats->tx_packets;
        stats->tx_bytes   = vstats->tx_bytes;
        stats->multicast  = vstats->rx_multicast_packets +
                            vstats->tx_multicast_packets;
        stats->tx_errors  = vstats->tx_error_packets;
        stats->rx_errors  = vstats->rx_error_packets;
        stats->tx_dropped = vstats->tx_queue_dropped;
        stats->rx_crc_errors = 0;
        stats->rx_length_errors = 0;

        return stats;
}

static void mlx5e_set_rx_mode(struct net_device *dev)
{
        struct mlx5e_priv *priv = netdev_priv(dev);

        schedule_work(&priv->set_rx_mode_work);
}

static int mlx5e_set_mac(struct net_device *netdev, void *addr)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        struct sockaddr *saddr = addr;

        if (!is_valid_ether_addr(saddr->sa_data))
                return -EADDRNOTAVAIL;

        netif_addr_lock_bh(netdev);
        ether_addr_copy(netdev->dev_addr, saddr->sa_data);
        netif_addr_unlock_bh(netdev);

        schedule_work(&priv->set_rx_mode_work);

        return 0;
}

static int mlx5e_set_features(struct net_device *netdev,
                              netdev_features_t features)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        int err = 0;
        netdev_features_t changes = features ^ netdev->features;

        mutex_lock(&priv->state_lock);

        if (changes & NETIF_F_LRO) {
                bool was_opened = test_bit(MLX5E_STATE_OPENED, &priv->state);

                if (was_opened)
                        mlx5e_close_locked(priv->netdev);

                priv->params.lro_en = !!(features & NETIF_F_LRO);
                err = mlx5e_modify_tirs_lro(priv);
                if (err)
                        mlx5_core_warn(priv->mdev, "lro modify failed, %d\n",
                                       err);

                if (was_opened)
                        err = mlx5e_open_locked(priv->netdev);
        }

        mutex_unlock(&priv->state_lock);

        if (changes & NETIF_F_HW_VLAN_CTAG_FILTER) {
                if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
                        mlx5e_enable_vlan_filter(priv);
                else
                        mlx5e_disable_vlan_filter(priv);
        }

        return err;
}

static int mlx5e_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        struct mlx5_core_dev *mdev = priv->mdev;
        bool was_opened;
        int max_mtu;
        int err = 0;

        mlx5_query_port_max_mtu(mdev, &max_mtu, 1);

        max_mtu = MLX5E_HW2SW_MTU(max_mtu);

        if (new_mtu > max_mtu) {
                netdev_err(netdev,
                           "%s: Bad MTU (%d) > (%d) Max\n",
                           __func__, new_mtu, max_mtu);
                return -EINVAL;
        }

        mutex_lock(&priv->state_lock);

        was_opened = test_bit(MLX5E_STATE_OPENED, &priv->state);
        if (was_opened)
                mlx5e_close_locked(netdev);

        netdev->mtu = new_mtu;

        if (was_opened)
                err = mlx5e_open_locked(netdev);

        mutex_unlock(&priv->state_lock);

        return err;
}

static int mlx5e_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
        switch (cmd) {
        case SIOCSHWTSTAMP:
                return mlx5e_hwstamp_set(dev, ifr);
        case SIOCGHWTSTAMP:
                return mlx5e_hwstamp_get(dev, ifr);
        default:
                return -EOPNOTSUPP;
        }
}

static int mlx5e_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_core_dev *mdev = priv->mdev;

        return mlx5_eswitch_set_vport_mac(mdev->priv.eswitch, vf + 1, mac);
}

static int mlx5e_set_vf_vlan(struct net_device *dev, int vf, u16 vlan, u8 qos)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_core_dev *mdev = priv->mdev;

        return mlx5_eswitch_set_vport_vlan(mdev->priv.eswitch, vf + 1,
                                           vlan, qos);
}

static int mlx5_vport_link2ifla(u8 esw_link)
{
        switch (esw_link) {
        case MLX5_ESW_VPORT_ADMIN_STATE_DOWN:
                return IFLA_VF_LINK_STATE_DISABLE;
        case MLX5_ESW_VPORT_ADMIN_STATE_UP:
                return IFLA_VF_LINK_STATE_ENABLE;
        }
        return IFLA_VF_LINK_STATE_AUTO;
}

static int mlx5_ifla_link2vport(u8 ifla_link)
{
        switch (ifla_link) {
        case IFLA_VF_LINK_STATE_DISABLE:
                return MLX5_ESW_VPORT_ADMIN_STATE_DOWN;
        case IFLA_VF_LINK_STATE_ENABLE:
                return MLX5_ESW_VPORT_ADMIN_STATE_UP;
        }
        return MLX5_ESW_VPORT_ADMIN_STATE_AUTO;
}

static int mlx5e_set_vf_link_state(struct net_device *dev, int vf,
                                   int link_state)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_core_dev *mdev = priv->mdev;

        return mlx5_eswitch_set_vport_state(mdev->priv.eswitch, vf + 1,
                                            mlx5_ifla_link2vport(link_state));
}

static int mlx5e_get_vf_config(struct net_device *dev,
                               int vf, struct ifla_vf_info *ivi)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_core_dev *mdev = priv->mdev;
        int err;

        err = mlx5_eswitch_get_vport_config(mdev->priv.eswitch, vf + 1, ivi);
        if (err)
                return err;
        ivi->linkstate = mlx5_vport_link2ifla(ivi->linkstate);
        return 0;
}

static int mlx5e_get_vf_stats(struct net_device *dev,
                              int vf, struct ifla_vf_stats *vf_stats)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_core_dev *mdev = priv->mdev;

        return mlx5_eswitch_get_vport_stats(mdev->priv.eswitch, vf + 1,
                                            vf_stats);
}

static const struct net_device_ops mlx5e_netdev_ops_basic = {
        .ndo_open                = mlx5e_open,
        .ndo_stop                = mlx5e_close,
        .ndo_start_xmit          = mlx5e_xmit,
        .ndo_get_stats64         = mlx5e_get_stats,
        .ndo_set_rx_mode         = mlx5e_set_rx_mode,
        .ndo_set_mac_address     = mlx5e_set_mac,
        .ndo_vlan_rx_add_vid     = mlx5e_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid    = mlx5e_vlan_rx_kill_vid,
        .ndo_set_features        = mlx5e_set_features,
        .ndo_change_mtu          = mlx5e_change_mtu,
        .ndo_do_ioctl            = mlx5e_ioctl,
};

static const struct net_device_ops mlx5e_netdev_ops_sriov = {
        .ndo_open                = mlx5e_open,
        .ndo_stop                = mlx5e_close,
        .ndo_start_xmit          = mlx5e_xmit,
        .ndo_get_stats64         = mlx5e_get_stats,
        .ndo_set_rx_mode         = mlx5e_set_rx_mode,
        .ndo_set_mac_address     = mlx5e_set_mac,
        .ndo_vlan_rx_add_vid     = mlx5e_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid    = mlx5e_vlan_rx_kill_vid,
        .ndo_set_features        = mlx5e_set_features,
        .ndo_change_mtu          = mlx5e_change_mtu,
        .ndo_do_ioctl            = mlx5e_ioctl,
        .ndo_set_vf_mac          = mlx5e_set_vf_mac,
        .ndo_set_vf_vlan         = mlx5e_set_vf_vlan,
        .ndo_get_vf_config       = mlx5e_get_vf_config,
        .ndo_set_vf_link_state   = mlx5e_set_vf_link_state,
        .ndo_get_vf_stats        = mlx5e_get_vf_stats,
};

static int mlx5e_check_required_hca_cap(struct mlx5_core_dev *mdev)
{
        if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
                return -ENOTSUPP;
        if (!MLX5_CAP_GEN(mdev, eth_net_offloads) ||
            !MLX5_CAP_GEN(mdev, nic_flow_table) ||
            !MLX5_CAP_ETH(mdev, csum_cap) ||
            !MLX5_CAP_ETH(mdev, max_lso_cap) ||
            !MLX5_CAP_ETH(mdev, vlan_cap) ||
            !MLX5_CAP_ETH(mdev, rss_ind_tbl_cap) ||
            MLX5_CAP_FLOWTABLE(mdev,
                               flow_table_properties_nic_receive.max_ft_level)
                               < 3) {
                mlx5_core_warn(mdev,
                               "Not creating net device, some required device capabilities are missing\n");
                return -ENOTSUPP;
        }
        if (!MLX5_CAP_ETH(mdev, self_lb_en_modifiable))
                mlx5_core_warn(mdev, "Self loop back prevention is not supported\n");

        return 0;
}

u16 mlx5e_get_max_inline_cap(struct mlx5_core_dev *mdev)
{
        int bf_buf_size = (1 << MLX5_CAP_GEN(mdev, log_bf_reg_size)) / 2;

        return bf_buf_size -
               sizeof(struct mlx5e_tx_wqe) +
               2 /*sizeof(mlx5e_tx_wqe.inline_hdr_start)*/;
}

void mlx5e_build_default_indir_rqt(u32 *indirection_rqt, int len,
                                   int num_channels)
{
        int i;

        for (i = 0; i < len; i++)
                indirection_rqt[i] = i % num_channels;
}

static void mlx5e_build_netdev_priv(struct mlx5_core_dev *mdev,
                                    struct net_device *netdev,
                                    int num_channels)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);

        priv->params.log_sq_size           =
                MLX5E_PARAMS_DEFAULT_LOG_SQ_SIZE;
        priv->params.log_rq_size           =
                MLX5E_PARAMS_DEFAULT_LOG_RQ_SIZE;
        priv->params.rx_cq_moderation_usec =
                MLX5E_PARAMS_DEFAULT_RX_CQ_MODERATION_USEC;
        priv->params.rx_cq_moderation_pkts =
                MLX5E_PARAMS_DEFAULT_RX_CQ_MODERATION_PKTS;
        priv->params.tx_cq_moderation_usec =
                MLX5E_PARAMS_DEFAULT_TX_CQ_MODERATION_USEC;
        priv->params.tx_cq_moderation_pkts =
                MLX5E_PARAMS_DEFAULT_TX_CQ_MODERATION_PKTS;
        priv->params.tx_max_inline         = mlx5e_get_max_inline_cap(mdev);
        priv->params.min_rx_wqes           =
                MLX5E_PARAMS_DEFAULT_MIN_RX_WQES;
        priv->params.num_tc                = 1;
        priv->params.default_vlan_prio     = 0;
        priv->params.rss_hfunc             = ETH_RSS_HASH_XOR;

        netdev_rss_key_fill(priv->params.toeplitz_hash_key,
                            sizeof(priv->params.toeplitz_hash_key));

        mlx5e_build_default_indir_rqt(priv->params.indirection_rqt,
                                      MLX5E_INDIR_RQT_SIZE, num_channels);

        priv->params.lro_wqe_sz            =
                MLX5E_PARAMS_DEFAULT_LRO_WQE_SZ;

        priv->mdev                         = mdev;
        priv->netdev                       = netdev;
        priv->params.num_channels          = num_channels;
        priv->default_vlan_prio            = priv->params.default_vlan_prio;

        spin_lock_init(&priv->async_events_spinlock);
        mutex_init(&priv->state_lock);

        INIT_WORK(&priv->update_carrier_work, mlx5e_update_carrier_work);
        INIT_WORK(&priv->set_rx_mode_work, mlx5e_set_rx_mode_work);
        INIT_DELAYED_WORK(&priv->update_stats_work, mlx5e_update_stats_work);
}

static void mlx5e_set_netdev_dev_addr(struct net_device *netdev)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);

        mlx5_query_nic_vport_mac_address(priv->mdev, 0, netdev->dev_addr);
        if (is_zero_ether_addr(netdev->dev_addr) &&
            !MLX5_CAP_GEN(priv->mdev, vport_group_manager)) {
                eth_hw_addr_random(netdev);
                mlx5_core_info(priv->mdev, "Assigned random MAC address %pM\n", netdev->dev_addr);
        }
}

static void mlx5e_build_netdev(struct net_device *netdev)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);
        struct mlx5_core_dev *mdev = priv->mdev;

        SET_NETDEV_DEV(netdev, &mdev->pdev->dev);

        if (MLX5_CAP_GEN(mdev, vport_group_manager))
                netdev->netdev_ops = &mlx5e_netdev_ops_sriov;
        else
                netdev->netdev_ops = &mlx5e_netdev_ops_basic;

        netdev->watchdog_timeo    = 15 * HZ;

        netdev->ethtool_ops       = &mlx5e_ethtool_ops;

        netdev->vlan_features    |= NETIF_F_SG;
        netdev->vlan_features    |= NETIF_F_IP_CSUM;
        netdev->vlan_features    |= NETIF_F_IPV6_CSUM;
        netdev->vlan_features    |= NETIF_F_GRO;
        netdev->vlan_features    |= NETIF_F_TSO;
        netdev->vlan_features    |= NETIF_F_TSO6;
        netdev->vlan_features    |= NETIF_F_RXCSUM;
        netdev->vlan_features    |= NETIF_F_RXHASH;

        if (!!MLX5_CAP_ETH(mdev, lro_cap))
                netdev->vlan_features    |= NETIF_F_LRO;

        netdev->hw_features       = netdev->vlan_features;
        netdev->hw_features      |= NETIF_F_HW_VLAN_CTAG_TX;
        netdev->hw_features      |= NETIF_F_HW_VLAN_CTAG_RX;
        netdev->hw_features      |= NETIF_F_HW_VLAN_CTAG_FILTER;

        netdev->features          = netdev->hw_features;
        if (!priv->params.lro_en)
                netdev->features  &= ~NETIF_F_LRO;

        netdev->features         |= NETIF_F_HIGHDMA;

        netdev->priv_flags       |= IFF_UNICAST_FLT;

        mlx5e_set_netdev_dev_addr(netdev);
}

static int mlx5e_create_mkey(struct mlx5e_priv *priv, u32 pdn,
                             struct mlx5_core_mr *mr)
{
        struct mlx5_core_dev *mdev = priv->mdev;
        struct mlx5_create_mkey_mbox_in *in;
        int err;

        in = mlx5_vzalloc(sizeof(*in));
        if (!in)
                return -ENOMEM;

        in->seg.flags = MLX5_PERM_LOCAL_WRITE |
                        MLX5_PERM_LOCAL_READ  |
                        MLX5_ACCESS_MODE_PA;
        in->seg.flags_pd = cpu_to_be32(pdn | MLX5_MKEY_LEN64);
        in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);

        err = mlx5_core_create_mkey(mdev, mr, in, sizeof(*in), NULL, NULL,
                                    NULL);

        kvfree(in);

        return err;
}

static void *mlx5e_create_netdev(struct mlx5_core_dev *mdev)
{
        struct net_device *netdev;
        struct mlx5e_priv *priv;
        int nch = mlx5e_get_max_num_channels(mdev);
        int err;

        if (mlx5e_check_required_hca_cap(mdev))
                return NULL;

        netdev = alloc_etherdev_mqs(sizeof(struct mlx5e_priv), nch, nch);
        if (!netdev) {
                mlx5_core_err(mdev, "alloc_etherdev_mqs() failed\n");
                return NULL;
        }

        mlx5e_build_netdev_priv(mdev, netdev, nch);
        mlx5e_build_netdev(netdev);

        netif_carrier_off(netdev);

        priv = netdev_priv(netdev);

        err = mlx5_alloc_map_uar(mdev, &priv->cq_uar);
        if (err) {
                mlx5_core_err(mdev, "alloc_map uar failed, %d\n", err);
                goto err_free_netdev;
        }

        err = mlx5_core_alloc_pd(mdev, &priv->pdn);
        if (err) {
                mlx5_core_err(mdev, "alloc pd failed, %d\n", err);
                goto err_unmap_free_uar;
        }

        err = mlx5_core_alloc_transport_domain(mdev, &priv->tdn);
        if (err) {
                mlx5_core_err(mdev, "alloc td failed, %d\n", err);
                goto err_dealloc_pd;
        }

        err = mlx5e_create_mkey(priv, priv->pdn, &priv->mr);
        if (err) {
                mlx5_core_err(mdev, "create mkey failed, %d\n", err);
                goto err_dealloc_transport_domain;
        }

        err = mlx5e_create_tises(priv);
        if (err) {
                mlx5_core_warn(mdev, "create tises failed, %d\n", err);
                goto err_destroy_mkey;
        }

        err = mlx5e_open_drop_rq(priv);
        if (err) {
                mlx5_core_err(mdev, "open drop rq failed, %d\n", err);
                goto err_destroy_tises;
        }

        err = mlx5e_create_rqt(priv, MLX5E_INDIRECTION_RQT);
        if (err) {
                mlx5_core_warn(mdev, "create rqt(INDIR) failed, %d\n", err);
                goto err_close_drop_rq;
        }

        err = mlx5e_create_rqt(priv, MLX5E_SINGLE_RQ_RQT);
        if (err) {
                mlx5_core_warn(mdev, "create rqt(SINGLE) failed, %d\n", err);
                goto err_destroy_rqt_indir;
        }

        err = mlx5e_create_tirs(priv);
        if (err) {
                mlx5_core_warn(mdev, "create tirs failed, %d\n", err);
                goto err_destroy_rqt_single;
        }

        err = mlx5e_create_flow_tables(priv);
        if (err) {
                mlx5_core_warn(mdev, "create flow tables failed, %d\n", err);
                goto err_destroy_tirs;
        }

        mlx5e_init_eth_addr(priv);

        err = register_netdev(netdev);
        if (err) {
                mlx5_core_err(mdev, "register_netdev failed, %d\n", err);
                goto err_destroy_flow_tables;
        }

        mlx5e_enable_async_events(priv);
        schedule_work(&priv->set_rx_mode_work);

        return priv;

err_destroy_flow_tables:
        mlx5e_destroy_flow_tables(priv);

err_destroy_tirs:
        mlx5e_destroy_tirs(priv);

err_destroy_rqt_single:
        mlx5e_destroy_rqt(priv, MLX5E_SINGLE_RQ_RQT);

err_destroy_rqt_indir:
        mlx5e_destroy_rqt(priv, MLX5E_INDIRECTION_RQT);

err_close_drop_rq:
        mlx5e_close_drop_rq(priv);

err_destroy_tises:
        mlx5e_destroy_tises(priv);

err_destroy_mkey:
        mlx5_core_destroy_mkey(mdev, &priv->mr);

err_dealloc_transport_domain:
        mlx5_core_dealloc_transport_domain(mdev, priv->tdn);

err_dealloc_pd:
        mlx5_core_dealloc_pd(mdev, priv->pdn);

err_unmap_free_uar:
        mlx5_unmap_free_uar(mdev, &priv->cq_uar);

err_free_netdev:
        free_netdev(netdev);

        return NULL;
}

static void mlx5e_destroy_netdev(struct mlx5_core_dev *mdev, void *vpriv)
{
        struct mlx5e_priv *priv = vpriv;
        struct net_device *netdev = priv->netdev;

        set_bit(MLX5E_STATE_DESTROYING, &priv->state);

        schedule_work(&priv->set_rx_mode_work);
        mlx5e_disable_async_events(priv);
        flush_scheduled_work();
        unregister_netdev(netdev);
        mlx5e_destroy_flow_tables(priv);
        mlx5e_destroy_tirs(priv);
        mlx5e_destroy_rqt(priv, MLX5E_SINGLE_RQ_RQT);
        mlx5e_destroy_rqt(priv, MLX5E_INDIRECTION_RQT);
        mlx5e_close_drop_rq(priv);
        mlx5e_destroy_tises(priv);
        mlx5_core_destroy_mkey(priv->mdev, &priv->mr);
        mlx5_core_dealloc_transport_domain(priv->mdev, priv->tdn);
        mlx5_core_dealloc_pd(priv->mdev, priv->pdn);
        mlx5_unmap_free_uar(priv->mdev, &priv->cq_uar);
        free_netdev(netdev);
}

static void *mlx5e_get_netdev(void *vpriv)
{
        struct mlx5e_priv *priv = vpriv;

        return priv->netdev;
}

static struct mlx5_interface mlx5e_interface = {
        .add       = mlx5e_create_netdev,
        .remove    = mlx5e_destroy_netdev,
        .event     = mlx5e_async_event,
        .protocol  = MLX5_INTERFACE_PROTOCOL_ETH,
        .get_dev   = mlx5e_get_netdev,
};

void mlx5e_init(void)
{
        mlx5_register_interface(&mlx5e_interface);
}

void mlx5e_cleanup(void)
{
        mlx5_unregister_interface(&mlx5e_interface);
}