/* SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright(c) 2019-2021 Xilinx, Inc.
 * Copyright(c) 2016-2019 Solarflare Communications Inc.
 *
 * This software was jointly developed between OKTET Labs (under contract
 * for Solarflare) and Solarflare Communications, Inc.
 */

#include <rte_dev.h>
#include <ethdev_driver.h>
#include <ethdev_pci.h>
#include <rte_pci.h>
#include <rte_bus_pci.h>
#include <rte_errno.h>
#include <rte_string_fns.h>
#include <rte_ether.h>

#include "efx.h"

#include "sfc.h"
#include "sfc_debug.h"
#include "sfc_log.h"
#include "sfc_kvargs.h"
#include "sfc_ev.h"
#include "sfc_rx.h"
#include "sfc_tx.h"
#include "sfc_flow.h"
#include "sfc_flow_tunnel.h"
#include "sfc_dp.h"
#include "sfc_dp_rx.h"
#include "sfc_repr.h"
#include "sfc_sw_stats.h"
#include "sfc_switch.h"
#include "sfc_nic_dma.h"

#define SFC_XSTAT_ID_INVALID_VAL  UINT64_MAX
#define SFC_XSTAT_ID_INVALID_NAME '\0'

uint32_t sfc_logtype_driver;

static struct sfc_dp_list sfc_dp_head =
        TAILQ_HEAD_INITIALIZER(sfc_dp_head);


static void sfc_eth_dev_clear_ops(struct rte_eth_dev *dev);


static int
sfc_fw_version_get(struct rte_eth_dev *dev, char *fw_version, size_t fw_size)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        efx_nic_fw_info_t enfi;
        int ret;
        int rc;

        rc = efx_nic_get_fw_version(sa->nic, &enfi);
        if (rc != 0)
                return -rc;

        ret = snprintf(fw_version, fw_size,
                       "%" PRIu16 ".%" PRIu16 ".%" PRIu16 ".%" PRIu16,
                       enfi.enfi_mc_fw_version[0], enfi.enfi_mc_fw_version[1],
                       enfi.enfi_mc_fw_version[2], enfi.enfi_mc_fw_version[3]);
        if (ret < 0)
                return ret;

        if (enfi.enfi_dpcpu_fw_ids_valid) {
                size_t dpcpu_fw_ids_offset = MIN(fw_size - 1, (size_t)ret);
                int ret_extra;

                ret_extra = snprintf(fw_version + dpcpu_fw_ids_offset,
                                     fw_size - dpcpu_fw_ids_offset,
                                     " rx%" PRIx16 " tx%" PRIx16,
                                     enfi.enfi_rx_dpcpu_fw_id,
                                     enfi.enfi_tx_dpcpu_fw_id);
                if (ret_extra < 0)
                        return ret_extra;

                ret += ret_extra;
        }

        if (fw_size < (size_t)(++ret))
                return ret;
        else
                return 0;
}

static int
sfc_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
{
        const struct sfc_adapter_priv *sap = sfc_adapter_priv_by_eth_dev(dev);
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_rss *rss = &sas->rss;
        struct sfc_mae *mae = &sa->mae;

        sfc_log_init(sa, "entry");

        dev_info->min_mtu = RTE_ETHER_MIN_MTU;
        dev_info->max_mtu = EFX_MAC_SDU_MAX;

        dev_info->max_rx_pktlen = EFX_MAC_PDU_MAX;

        dev_info->max_vfs = sa->sriov.num_vfs;

        /* Autonegotiation may be disabled */
        dev_info->speed_capa = RTE_ETH_LINK_SPEED_FIXED;
        if (sa->port.phy_adv_cap_mask & (1u << EFX_PHY_CAP_1000FDX))
                dev_info->speed_capa |= RTE_ETH_LINK_SPEED_1G;
        if (sa->port.phy_adv_cap_mask & (1u << EFX_PHY_CAP_10000FDX))
                dev_info->speed_capa |= RTE_ETH_LINK_SPEED_10G;
        if (sa->port.phy_adv_cap_mask & (1u << EFX_PHY_CAP_25000FDX))
                dev_info->speed_capa |= RTE_ETH_LINK_SPEED_25G;
        if (sa->port.phy_adv_cap_mask & (1u << EFX_PHY_CAP_40000FDX))
                dev_info->speed_capa |= RTE_ETH_LINK_SPEED_40G;
        if (sa->port.phy_adv_cap_mask & (1u << EFX_PHY_CAP_50000FDX))
                dev_info->speed_capa |= RTE_ETH_LINK_SPEED_50G;
        if (sa->port.phy_adv_cap_mask & (1u << EFX_PHY_CAP_100000FDX))
                dev_info->speed_capa |= RTE_ETH_LINK_SPEED_100G;

        dev_info->max_rx_queues = sa->rxq_max;
        dev_info->max_tx_queues = sa->txq_max;

        /* By default packets are dropped if no descriptors are available */
        dev_info->default_rxconf.rx_drop_en = 1;

        dev_info->rx_queue_offload_capa = sfc_rx_get_queue_offload_caps(sa);

        /*
         * rx_offload_capa includes both device and queue offloads since
         * the latter may be requested on a per device basis which makes
         * sense when some offloads are needed to be set on all queues.
         */
        dev_info->rx_offload_capa = sfc_rx_get_dev_offload_caps(sa) |
                                    dev_info->rx_queue_offload_capa;

        dev_info->tx_queue_offload_capa = sfc_tx_get_queue_offload_caps(sa);

        /*
         * tx_offload_capa includes both device and queue offloads since
         * the latter may be requested on a per device basis which makes
         * sense when some offloads are needed to be set on all queues.
         */
        dev_info->tx_offload_capa = sfc_tx_get_dev_offload_caps(sa) |
                                    dev_info->tx_queue_offload_capa;

        if (rss->context_type != EFX_RX_SCALE_UNAVAILABLE) {
                uint64_t rte_hf = 0;
                unsigned int i;

                for (i = 0; i < rss->hf_map_nb_entries; ++i)
                        rte_hf |= rss->hf_map[i].rte;

                dev_info->reta_size = EFX_RSS_TBL_SIZE;
                dev_info->hash_key_size = EFX_RSS_KEY_SIZE;
                dev_info->flow_type_rss_offloads = rte_hf;
        }

        /* Initialize to hardware limits */
        dev_info->rx_desc_lim.nb_max = sa->rxq_max_entries;
        dev_info->rx_desc_lim.nb_min = sa->rxq_min_entries;
        /* The RXQ hardware requires that the descriptor count is a power
         * of 2, but rx_desc_lim cannot properly describe that constraint.
         */
        dev_info->rx_desc_lim.nb_align = sa->rxq_min_entries;

        /* Initialize to hardware limits */
        dev_info->tx_desc_lim.nb_max = sa->txq_max_entries;
        dev_info->tx_desc_lim.nb_min = sa->txq_min_entries;
        /*
         * The TXQ hardware requires that the descriptor count is a power
         * of 2, but tx_desc_lim cannot properly describe that constraint
         */
        dev_info->tx_desc_lim.nb_align = sa->txq_min_entries;

        if (sap->dp_rx->get_dev_info != NULL)
                sap->dp_rx->get_dev_info(dev_info);
        if (sap->dp_tx->get_dev_info != NULL)
                sap->dp_tx->get_dev_info(dev_info);

        dev_info->dev_capa = RTE_ETH_DEV_CAPA_RUNTIME_RX_QUEUE_SETUP |
                             RTE_ETH_DEV_CAPA_RUNTIME_TX_QUEUE_SETUP;
        dev_info->dev_capa &= ~RTE_ETH_DEV_CAPA_FLOW_RULE_KEEP;

        if (mae->status == SFC_MAE_STATUS_SUPPORTED ||
            mae->status == SFC_MAE_STATUS_ADMIN) {
                dev_info->switch_info.name = dev->device->driver->name;
                dev_info->switch_info.domain_id = mae->switch_domain_id;
                dev_info->switch_info.port_id = mae->switch_port_id;
        }

        return 0;
}

static const uint32_t *
sfc_dev_supported_ptypes_get(struct rte_eth_dev *dev)
{
        const struct sfc_adapter_priv *sap = sfc_adapter_priv_by_eth_dev(dev);

        return sap->dp_rx->supported_ptypes_get(sap->shared->tunnel_encaps);
}

static int
sfc_dev_configure(struct rte_eth_dev *dev)
{
        struct rte_eth_dev_data *dev_data = dev->data;
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        int rc;

        sfc_log_init(sa, "entry n_rxq=%u n_txq=%u",
                     dev_data->nb_rx_queues, dev_data->nb_tx_queues);

        sfc_adapter_lock(sa);
        switch (sa->state) {
        case SFC_ETHDEV_CONFIGURED:
                /* FALLTHROUGH */
        case SFC_ETHDEV_INITIALIZED:
                rc = sfc_configure(sa);
                break;
        default:
                sfc_err(sa, "unexpected adapter state %u to configure",
                        sa->state);
                rc = EINVAL;
                break;
        }
        sfc_adapter_unlock(sa);

        sfc_log_init(sa, "done %d", rc);
        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_dev_start(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        int rc;

        sfc_log_init(sa, "entry");

        sfc_adapter_lock(sa);
        rc = sfc_start(sa);
        sfc_adapter_unlock(sa);

        sfc_log_init(sa, "done %d", rc);
        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct rte_eth_link current_link;
        int ret;

        sfc_log_init(sa, "entry");

        if (sa->state != SFC_ETHDEV_STARTED) {
                sfc_port_link_mode_to_info(EFX_LINK_UNKNOWN, &current_link);
        } else if (wait_to_complete) {
                efx_link_mode_t link_mode;

                if (efx_port_poll(sa->nic, &link_mode) != 0)
                        link_mode = EFX_LINK_UNKNOWN;
                sfc_port_link_mode_to_info(link_mode, &current_link);

        } else {
                sfc_ev_mgmt_qpoll(sa);
                rte_eth_linkstatus_get(dev, &current_link);
        }

        ret = rte_eth_linkstatus_set(dev, &current_link);
        if (ret == 0)
                sfc_notice(sa, "Link status is %s",
                           current_link.link_status ? "UP" : "DOWN");

        return ret;
}

static int
sfc_dev_stop(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);

        sfc_log_init(sa, "entry");

        sfc_adapter_lock(sa);
        sfc_stop(sa);
        sfc_adapter_unlock(sa);

        sfc_log_init(sa, "done");

        return 0;
}

static int
sfc_dev_set_link_up(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        int rc;

        sfc_log_init(sa, "entry");

        sfc_adapter_lock(sa);
        rc = sfc_start(sa);
        sfc_adapter_unlock(sa);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_dev_set_link_down(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);

        sfc_log_init(sa, "entry");

        sfc_adapter_lock(sa);
        sfc_stop(sa);
        sfc_adapter_unlock(sa);

        return 0;
}

static void
sfc_eth_dev_secondary_clear_ops(struct rte_eth_dev *dev)
{
        free(dev->process_private);
        rte_eth_dev_release_port(dev);
}

static int
sfc_dev_close(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);

        sfc_log_init(sa, "entry");

        if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
                sfc_eth_dev_secondary_clear_ops(dev);
                return 0;
        }

        sfc_pre_detach(sa);

        sfc_adapter_lock(sa);
        switch (sa->state) {
        case SFC_ETHDEV_STARTED:
                sfc_stop(sa);
                SFC_ASSERT(sa->state == SFC_ETHDEV_CONFIGURED);
                /* FALLTHROUGH */
        case SFC_ETHDEV_CONFIGURED:
                sfc_close(sa);
                SFC_ASSERT(sa->state == SFC_ETHDEV_INITIALIZED);
                /* FALLTHROUGH */
        case SFC_ETHDEV_INITIALIZED:
                break;
        default:
                sfc_err(sa, "unexpected adapter state %u on close", sa->state);
                break;
        }

        /*
         * Cleanup all resources.
         * Rollback primary process sfc_eth_dev_init() below.
         */

        sfc_eth_dev_clear_ops(dev);

        sfc_nic_dma_detach(sa);
        sfc_detach(sa);
        sfc_unprobe(sa);

        sfc_kvargs_cleanup(sa);

        sfc_adapter_unlock(sa);
        sfc_adapter_lock_fini(sa);

        sfc_log_init(sa, "done");

        /* Required for logging, so cleanup last */
        sa->eth_dev = NULL;

        free(sa);

        return 0;
}

static int
sfc_dev_filter_set(struct rte_eth_dev *dev, enum sfc_dev_filter_mode mode,
                   boolean_t enabled)
{
        struct sfc_port *port;
        boolean_t *toggle;
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        boolean_t allmulti = (mode == SFC_DEV_FILTER_MODE_ALLMULTI);
        const char *desc = (allmulti) ? "all-multi" : "promiscuous";
        int rc = 0;

        sfc_adapter_lock(sa);

        port = &sa->port;
        toggle = (allmulti) ? (&port->allmulti) : (&port->promisc);

        if (*toggle != enabled) {
                *toggle = enabled;

                if (sfc_sa2shared(sa)->isolated) {
                        sfc_warn(sa, "isolated mode is active on the port");
                        sfc_warn(sa, "the change is to be applied on the next "
                                     "start provided that isolated mode is "
                                     "disabled prior the next start");
                } else if ((sa->state == SFC_ETHDEV_STARTED) &&
                           ((rc = sfc_set_rx_mode(sa)) != 0)) {
                        *toggle = !(enabled);
                        sfc_warn(sa, "Failed to %s %s mode, rc = %d",
                                 ((enabled) ? "enable" : "disable"), desc, rc);

                        /*
                         * For promiscuous and all-multicast filters a
                         * permission failure should be reported as an
                         * unsupported filter.
                         */
                        if (rc == EPERM)
                                rc = ENOTSUP;
                }
        }

        sfc_adapter_unlock(sa);
        return rc;
}

static int
sfc_dev_promisc_enable(struct rte_eth_dev *dev)
{
        int rc = sfc_dev_filter_set(dev, SFC_DEV_FILTER_MODE_PROMISC, B_TRUE);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_dev_promisc_disable(struct rte_eth_dev *dev)
{
        int rc = sfc_dev_filter_set(dev, SFC_DEV_FILTER_MODE_PROMISC, B_FALSE);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_dev_allmulti_enable(struct rte_eth_dev *dev)
{
        int rc = sfc_dev_filter_set(dev, SFC_DEV_FILTER_MODE_ALLMULTI, B_TRUE);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_dev_allmulti_disable(struct rte_eth_dev *dev)
{
        int rc = sfc_dev_filter_set(dev, SFC_DEV_FILTER_MODE_ALLMULTI, B_FALSE);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_rx_queue_setup(struct rte_eth_dev *dev, uint16_t ethdev_qid,
                   uint16_t nb_rx_desc, unsigned int socket_id,
                   const struct rte_eth_rxconf *rx_conf,
                   struct rte_mempool *mb_pool)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        sfc_ethdev_qid_t sfc_ethdev_qid = ethdev_qid;
        struct sfc_rxq_info *rxq_info;
        sfc_sw_index_t sw_index;
        int rc;

        sfc_log_init(sa, "RxQ=%u nb_rx_desc=%u socket_id=%u",
                     ethdev_qid, nb_rx_desc, socket_id);

        sfc_adapter_lock(sa);

        sw_index = sfc_rxq_sw_index_by_ethdev_rx_qid(sas, sfc_ethdev_qid);
        rc = sfc_rx_qinit(sa, sw_index, nb_rx_desc, socket_id,
                          rx_conf, mb_pool);
        if (rc != 0)
                goto fail_rx_qinit;

        rxq_info = sfc_rxq_info_by_ethdev_qid(sas, sfc_ethdev_qid);
        dev->data->rx_queues[ethdev_qid] = rxq_info->dp;

        sfc_adapter_unlock(sa);

        return 0;

fail_rx_qinit:
        sfc_adapter_unlock(sa);
        SFC_ASSERT(rc > 0);
        return -rc;
}

static void
sfc_rx_queue_release(struct rte_eth_dev *dev, uint16_t qid)
{
        struct sfc_dp_rxq *dp_rxq = dev->data->rx_queues[qid];
        struct sfc_rxq *rxq;
        struct sfc_adapter *sa;
        sfc_sw_index_t sw_index;

        if (dp_rxq == NULL)
                return;

        rxq = sfc_rxq_by_dp_rxq(dp_rxq);
        sa = rxq->evq->sa;
        sfc_adapter_lock(sa);

        sw_index = dp_rxq->dpq.queue_id;

        sfc_log_init(sa, "RxQ=%u", sw_index);

        sfc_rx_qfini(sa, sw_index);

        sfc_adapter_unlock(sa);
}

static int
sfc_tx_queue_setup(struct rte_eth_dev *dev, uint16_t ethdev_qid,
                   uint16_t nb_tx_desc, unsigned int socket_id,
                   const struct rte_eth_txconf *tx_conf)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_txq_info *txq_info;
        sfc_sw_index_t sw_index;
        int rc;

        sfc_log_init(sa, "TxQ = %u, nb_tx_desc = %u, socket_id = %u",
                     ethdev_qid, nb_tx_desc, socket_id);

        sfc_adapter_lock(sa);

        sw_index = sfc_txq_sw_index_by_ethdev_tx_qid(sas, ethdev_qid);
        rc = sfc_tx_qinit(sa, sw_index, nb_tx_desc, socket_id, tx_conf);
        if (rc != 0)
                goto fail_tx_qinit;

        txq_info = sfc_txq_info_by_ethdev_qid(sas, ethdev_qid);
        dev->data->tx_queues[ethdev_qid] = txq_info->dp;

        sfc_adapter_unlock(sa);
        return 0;

fail_tx_qinit:
        sfc_adapter_unlock(sa);
        SFC_ASSERT(rc > 0);
        return -rc;
}

static void
sfc_tx_queue_release(struct rte_eth_dev *dev, uint16_t qid)
{
        struct sfc_dp_txq *dp_txq = dev->data->tx_queues[qid];
        struct sfc_txq *txq;
        sfc_sw_index_t sw_index;
        struct sfc_adapter *sa;

        if (dp_txq == NULL)
                return;

        txq = sfc_txq_by_dp_txq(dp_txq);
        sw_index = dp_txq->dpq.queue_id;

        SFC_ASSERT(txq->evq != NULL);
        sa = txq->evq->sa;

        sfc_log_init(sa, "TxQ = %u", sw_index);

        sfc_adapter_lock(sa);

        sfc_tx_qfini(sa, sw_index);

        sfc_adapter_unlock(sa);
}

static void
sfc_stats_get_dp_rx(struct sfc_adapter *sa, uint64_t *pkts, uint64_t *bytes)
{
        struct sfc_adapter_shared *sas = sfc_sa2shared(sa);
        uint64_t pkts_sum = 0;
        uint64_t bytes_sum = 0;
        unsigned int i;

        for (i = 0; i < sas->ethdev_rxq_count; ++i) {
                struct sfc_rxq_info *rxq_info;

                rxq_info = sfc_rxq_info_by_ethdev_qid(sas, i);
                if (rxq_info->state & SFC_RXQ_INITIALIZED) {
                        union sfc_pkts_bytes qstats;

                        sfc_pkts_bytes_get(&rxq_info->dp->dpq.stats, &qstats);
                        pkts_sum += qstats.pkts -
                                        sa->sw_stats.reset_rx_pkts[i];
                        bytes_sum += qstats.bytes -
                                        sa->sw_stats.reset_rx_bytes[i];
                }
        }

        *pkts = pkts_sum;
        *bytes = bytes_sum;
}

static void
sfc_stats_get_dp_tx(struct sfc_adapter *sa, uint64_t *pkts, uint64_t *bytes)
{
        struct sfc_adapter_shared *sas = sfc_sa2shared(sa);
        uint64_t pkts_sum = 0;
        uint64_t bytes_sum = 0;
        unsigned int i;

        for (i = 0; i < sas->ethdev_txq_count; ++i) {
                struct sfc_txq_info *txq_info;

                txq_info = sfc_txq_info_by_ethdev_qid(sas, i);
                if (txq_info->state & SFC_TXQ_INITIALIZED) {
                        union sfc_pkts_bytes qstats;

                        sfc_pkts_bytes_get(&txq_info->dp->dpq.stats, &qstats);
                        pkts_sum += qstats.pkts -
                                        sa->sw_stats.reset_tx_pkts[i];
                        bytes_sum += qstats.bytes -
                                        sa->sw_stats.reset_tx_bytes[i];
                }
        }

        *pkts = pkts_sum;
        *bytes = bytes_sum;
}

/*
 * Some statistics are computed as A - B where A and B each increase
 * monotonically with some hardware counter(s) and the counters are read
 * asynchronously.
 *
 * If packet X is counted in A, but not counted in B yet, computed value is
 * greater than real.
 *
 * If packet X is not counted in A at the moment of reading the counter,
 * but counted in B at the moment of reading the counter, computed value
 * is less than real.
 *
 * However, counter which grows backward is worse evil than slightly wrong
 * value. So, let's try to guarantee that it never happens except may be
 * the case when the MAC stats are zeroed as a result of a NIC reset.
 */
static void
sfc_update_diff_stat(uint64_t *stat, uint64_t newval)
{
        if ((int64_t)(newval - *stat) > 0 || newval == 0)
                *stat = newval;
}

static int
sfc_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
        const struct sfc_adapter_priv *sap = sfc_adapter_priv_by_eth_dev(dev);
        bool have_dp_rx_stats = sap->dp_rx->features & SFC_DP_RX_FEAT_STATS;
        bool have_dp_tx_stats = sap->dp_tx->features & SFC_DP_TX_FEAT_STATS;
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_port *port = &sa->port;
        uint64_t *mac_stats;
        int ret;

        sfc_adapter_lock(sa);

        if (have_dp_rx_stats)
                sfc_stats_get_dp_rx(sa, &stats->ipackets, &stats->ibytes);
        if (have_dp_tx_stats)
                sfc_stats_get_dp_tx(sa, &stats->opackets, &stats->obytes);

        ret = sfc_port_update_mac_stats(sa, B_FALSE);
        if (ret != 0)
                goto unlock;

        mac_stats = port->mac_stats_buf;

        if (EFX_MAC_STAT_SUPPORTED(port->mac_stats_mask,
                                   EFX_MAC_VADAPTER_RX_UNICAST_PACKETS)) {
                if (!have_dp_rx_stats) {
                        stats->ipackets =
                                mac_stats[EFX_MAC_VADAPTER_RX_UNICAST_PACKETS] +
                                mac_stats[EFX_MAC_VADAPTER_RX_MULTICAST_PACKETS] +
                                mac_stats[EFX_MAC_VADAPTER_RX_BROADCAST_PACKETS];
                        stats->ibytes =
                                mac_stats[EFX_MAC_VADAPTER_RX_UNICAST_BYTES] +
                                mac_stats[EFX_MAC_VADAPTER_RX_MULTICAST_BYTES] +
                                mac_stats[EFX_MAC_VADAPTER_RX_BROADCAST_BYTES];

                        /* CRC is included in these stats, but shouldn't be */
                        stats->ibytes -= stats->ipackets * RTE_ETHER_CRC_LEN;
                }
                if (!have_dp_tx_stats) {
                        stats->opackets =
                                mac_stats[EFX_MAC_VADAPTER_TX_UNICAST_PACKETS] +
                                mac_stats[EFX_MAC_VADAPTER_TX_MULTICAST_PACKETS] +
                                mac_stats[EFX_MAC_VADAPTER_TX_BROADCAST_PACKETS];
                        stats->obytes =
                                mac_stats[EFX_MAC_VADAPTER_TX_UNICAST_BYTES] +
                                mac_stats[EFX_MAC_VADAPTER_TX_MULTICAST_BYTES] +
                                mac_stats[EFX_MAC_VADAPTER_TX_BROADCAST_BYTES];

                        /* CRC is included in these stats, but shouldn't be */
                        stats->obytes -= stats->opackets * RTE_ETHER_CRC_LEN;
                }
                stats->imissed = mac_stats[EFX_MAC_VADAPTER_RX_BAD_PACKETS];
                stats->oerrors = mac_stats[EFX_MAC_VADAPTER_TX_BAD_PACKETS];
        } else {
                if (!have_dp_tx_stats) {
                        stats->opackets = mac_stats[EFX_MAC_TX_PKTS];
                        stats->obytes = mac_stats[EFX_MAC_TX_OCTETS] -
                                mac_stats[EFX_MAC_TX_PKTS] * RTE_ETHER_CRC_LEN;
                }

                /*
                 * Take into account stats which are whenever supported
                 * on EF10. If some stat is not supported by current
                 * firmware variant or HW revision, it is guaranteed
                 * to be zero in mac_stats.
                 */
                stats->imissed =
                        mac_stats[EFX_MAC_RX_NODESC_DROP_CNT] +
                        mac_stats[EFX_MAC_PM_TRUNC_BB_OVERFLOW] +
                        mac_stats[EFX_MAC_PM_DISCARD_BB_OVERFLOW] +
                        mac_stats[EFX_MAC_PM_TRUNC_VFIFO_FULL] +
                        mac_stats[EFX_MAC_PM_DISCARD_VFIFO_FULL] +
                        mac_stats[EFX_MAC_PM_TRUNC_QBB] +
                        mac_stats[EFX_MAC_PM_DISCARD_QBB] +
                        mac_stats[EFX_MAC_PM_DISCARD_MAPPING] +
                        mac_stats[EFX_MAC_RXDP_Q_DISABLED_PKTS] +
                        mac_stats[EFX_MAC_RXDP_DI_DROPPED_PKTS];
                stats->ierrors =
                        mac_stats[EFX_MAC_RX_FCS_ERRORS] +
                        mac_stats[EFX_MAC_RX_ALIGN_ERRORS] +
                        mac_stats[EFX_MAC_RX_JABBER_PKTS];
                /* no oerrors counters supported on EF10 */

                if (!have_dp_rx_stats) {
                        /* Exclude missed, errors and pauses from Rx packets */
                        sfc_update_diff_stat(&port->ipackets,
                                mac_stats[EFX_MAC_RX_PKTS] -
                                mac_stats[EFX_MAC_RX_PAUSE_PKTS] -
                                stats->imissed - stats->ierrors);
                        stats->ipackets = port->ipackets;
                        stats->ibytes = mac_stats[EFX_MAC_RX_OCTETS] -
                                mac_stats[EFX_MAC_RX_PKTS] * RTE_ETHER_CRC_LEN;
                }
        }

unlock:
        sfc_adapter_unlock(sa);
        SFC_ASSERT(ret >= 0);
        return -ret;
}

static int
sfc_stats_reset(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_port *port = &sa->port;
        int rc;

        sfc_adapter_lock(sa);

        if (sa->state != SFC_ETHDEV_STARTED) {
                /*
                 * The operation cannot be done if port is not started; it
                 * will be scheduled to be done during the next port start
                 */
                port->mac_stats_reset_pending = B_TRUE;
                sfc_adapter_unlock(sa);
                return 0;
        }

        rc = sfc_port_reset_mac_stats(sa);
        if (rc != 0)
                sfc_err(sa, "failed to reset statistics (rc = %d)", rc);

        sfc_sw_xstats_reset(sa);

        sfc_adapter_unlock(sa);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

static unsigned int
sfc_xstats_get_nb_supported(struct sfc_adapter *sa)
{
        struct sfc_port *port = &sa->port;
        unsigned int nb_supported;

        sfc_adapter_lock(sa);
        nb_supported = port->mac_stats_nb_supported +
                       sfc_sw_xstats_get_nb_supported(sa);
        sfc_adapter_unlock(sa);

        return nb_supported;
}

static int
sfc_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
               unsigned int xstats_count)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        unsigned int nb_written = 0;
        unsigned int nb_supported = 0;
        int rc;

        if (unlikely(xstats == NULL))
                return sfc_xstats_get_nb_supported(sa);

        rc = sfc_port_get_mac_stats(sa, xstats, xstats_count, &nb_written);
        if (rc < 0)
                return rc;

        nb_supported = rc;
        sfc_sw_xstats_get_vals(sa, xstats, xstats_count, &nb_written,
                               &nb_supported);

        return nb_supported;
}

static int
sfc_xstats_get_names(struct rte_eth_dev *dev,
                     struct rte_eth_xstat_name *xstats_names,
                     unsigned int xstats_count)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_port *port = &sa->port;
        unsigned int i;
        unsigned int nstats = 0;
        unsigned int nb_written = 0;
        int ret;

        if (unlikely(xstats_names == NULL))
                return sfc_xstats_get_nb_supported(sa);

        for (i = 0; i < EFX_MAC_NSTATS; ++i) {
                if (EFX_MAC_STAT_SUPPORTED(port->mac_stats_mask, i)) {
                        if (nstats < xstats_count) {
                                strlcpy(xstats_names[nstats].name,
                                        efx_mac_stat_name(sa->nic, i),
                                        sizeof(xstats_names[0].name));
                                nb_written++;
                        }
                        nstats++;
                }
        }

        ret = sfc_sw_xstats_get_names(sa, xstats_names, xstats_count,
                                      &nb_written, &nstats);
        if (ret != 0) {
                SFC_ASSERT(ret < 0);
                return ret;
        }

        return nstats;
}

static int
sfc_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
                     uint64_t *values, unsigned int n)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_port *port = &sa->port;
        unsigned int nb_supported;
        unsigned int i;
        int rc;

        if (unlikely(ids == NULL || values == NULL))
                return -EINVAL;

        /*
         * Values array could be filled in nonsequential order. Fill values with
         * constant indicating invalid ID first.
         */
        for (i = 0; i < n; i++)
                values[i] = SFC_XSTAT_ID_INVALID_VAL;

        rc = sfc_port_get_mac_stats_by_id(sa, ids, values, n);
        if (rc != 0)
                return rc;

        nb_supported = port->mac_stats_nb_supported;
        sfc_sw_xstats_get_vals_by_id(sa, ids, values, n, &nb_supported);

        /* Return number of written stats before invalid ID is encountered. */
        for (i = 0; i < n; i++) {
                if (values[i] == SFC_XSTAT_ID_INVALID_VAL)
                        return i;
        }

        return n;
}

static int
sfc_xstats_get_names_by_id(struct rte_eth_dev *dev,
                           const uint64_t *ids,
                           struct rte_eth_xstat_name *xstats_names,
                           unsigned int size)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_port *port = &sa->port;
        unsigned int nb_supported;
        unsigned int i;
        int ret;

        if (unlikely(xstats_names == NULL && ids != NULL) ||
            unlikely(xstats_names != NULL && ids == NULL))
                return -EINVAL;

        if (unlikely(xstats_names == NULL && ids == NULL))
                return sfc_xstats_get_nb_supported(sa);

        /*
         * Names array could be filled in nonsequential order. Fill names with
         * string indicating invalid ID first.
         */
        for (i = 0; i < size; i++)
                xstats_names[i].name[0] = SFC_XSTAT_ID_INVALID_NAME;

        sfc_adapter_lock(sa);

        SFC_ASSERT(port->mac_stats_nb_supported <=
                   RTE_DIM(port->mac_stats_by_id));

        for (i = 0; i < size; i++) {
                if (ids[i] < port->mac_stats_nb_supported) {
                        strlcpy(xstats_names[i].name,
                                efx_mac_stat_name(sa->nic,
                                                 port->mac_stats_by_id[ids[i]]),
                                sizeof(xstats_names[0].name));
                }
        }

        nb_supported = port->mac_stats_nb_supported;

        sfc_adapter_unlock(sa);

        ret = sfc_sw_xstats_get_names_by_id(sa, ids, xstats_names, size,
                                            &nb_supported);
        if (ret != 0) {
                SFC_ASSERT(ret < 0);
                return ret;
        }

        /* Return number of written names before invalid ID is encountered. */
        for (i = 0; i < size; i++) {
                if (xstats_names[i].name[0] == SFC_XSTAT_ID_INVALID_NAME)
                        return i;
        }

        return size;
}

static int
sfc_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        unsigned int wanted_fc, link_fc;

        memset(fc_conf, 0, sizeof(*fc_conf));

        sfc_adapter_lock(sa);

        if (sa->state == SFC_ETHDEV_STARTED)
                efx_mac_fcntl_get(sa->nic, &wanted_fc, &link_fc);
        else
                link_fc = sa->port.flow_ctrl;

        switch (link_fc) {
        case 0:
                fc_conf->mode = RTE_ETH_FC_NONE;
                break;
        case EFX_FCNTL_RESPOND:
                fc_conf->mode = RTE_ETH_FC_RX_PAUSE;
                break;
        case EFX_FCNTL_GENERATE:
                fc_conf->mode = RTE_ETH_FC_TX_PAUSE;
                break;
        case (EFX_FCNTL_RESPOND | EFX_FCNTL_GENERATE):
                fc_conf->mode = RTE_ETH_FC_FULL;
                break;
        default:

                sfc_err(sa, "%s: unexpected flow control value %#x",
                        __func__, link_fc);
        }

        fc_conf->autoneg = sa->port.flow_ctrl_autoneg;

        sfc_adapter_unlock(sa);

        return 0;
}

static int
sfc_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_port *port = &sa->port;
        unsigned int fcntl;
        int rc;

        if (fc_conf->high_water != 0 || fc_conf->low_water != 0 ||
            fc_conf->pause_time != 0 || fc_conf->send_xon != 0 ||
            fc_conf->mac_ctrl_frame_fwd != 0) {
                sfc_err(sa, "unsupported flow control settings specified");
                rc = EINVAL;
                goto fail_inval;
        }

        switch (fc_conf->mode) {
        case RTE_ETH_FC_NONE:
                fcntl = 0;
                break;
        case RTE_ETH_FC_RX_PAUSE:
                fcntl = EFX_FCNTL_RESPOND;
                break;
        case RTE_ETH_FC_TX_PAUSE:
                fcntl = EFX_FCNTL_GENERATE;
                break;
        case RTE_ETH_FC_FULL:
                fcntl = EFX_FCNTL_RESPOND | EFX_FCNTL_GENERATE;
                break;
        default:
                rc = EINVAL;
                goto fail_inval;
        }

        sfc_adapter_lock(sa);

        if (sa->state == SFC_ETHDEV_STARTED) {
                rc = efx_mac_fcntl_set(sa->nic, fcntl, fc_conf->autoneg);
                if (rc != 0)
                        goto fail_mac_fcntl_set;
        }

        port->flow_ctrl = fcntl;
        port->flow_ctrl_autoneg = fc_conf->autoneg;

        sfc_adapter_unlock(sa);

        return 0;

fail_mac_fcntl_set:
        sfc_adapter_unlock(sa);
fail_inval:
        SFC_ASSERT(rc > 0);
        return -rc;
}

static int
sfc_check_scatter_on_all_rx_queues(struct sfc_adapter *sa, size_t pdu)
{
        struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
        const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
        boolean_t scatter_enabled;
        const char *error;
        unsigned int i;

        for (i = 0; i < sas->rxq_count; i++) {
                if ((sas->rxq_info[i].state & SFC_RXQ_INITIALIZED) == 0)
                        continue;

                scatter_enabled = (sas->rxq_info[i].type_flags &
                                   EFX_RXQ_FLAG_SCATTER);

                if (!sfc_rx_check_scatter(pdu, sa->rxq_ctrl[i].buf_size,
                                          encp->enc_rx_prefix_size,
                                          scatter_enabled,
                                          encp->enc_rx_scatter_max, &error)) {
                        sfc_err(sa, "MTU check for RxQ %u failed: %s", i,
                                error);
                        return EINVAL;
                }
        }

        return 0;
}

static int
sfc_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        size_t pdu = EFX_MAC_PDU(mtu);
        size_t old_pdu;
        int rc;

        sfc_log_init(sa, "mtu=%u", mtu);

        rc = EINVAL;
        if (pdu < EFX_MAC_PDU_MIN) {
                sfc_err(sa, "too small MTU %u (PDU size %u less than min %u)",
                        (unsigned int)mtu, (unsigned int)pdu,
                        EFX_MAC_PDU_MIN);
                goto fail_inval;
        }
        if (pdu > EFX_MAC_PDU_MAX) {
                sfc_err(sa, "too big MTU %u (PDU size %u greater than max %u)",
                        (unsigned int)mtu, (unsigned int)pdu,
                        (unsigned int)EFX_MAC_PDU_MAX);
                goto fail_inval;
        }

        sfc_adapter_lock(sa);

        rc = sfc_check_scatter_on_all_rx_queues(sa, pdu);
        if (rc != 0)
                goto fail_check_scatter;

        if (pdu != sa->port.pdu) {
                if (sa->state == SFC_ETHDEV_STARTED) {
                        sfc_stop(sa);

                        old_pdu = sa->port.pdu;
                        sa->port.pdu = pdu;
                        rc = sfc_start(sa);
                        if (rc != 0)
                                goto fail_start;
                } else {
                        sa->port.pdu = pdu;
                }
        }

        sfc_adapter_unlock(sa);

        sfc_log_init(sa, "done");
        return 0;

fail_start:
        sa->port.pdu = old_pdu;
        if (sfc_start(sa) != 0)
                sfc_err(sa, "cannot start with neither new (%u) nor old (%u) "
                        "PDU max size - port is stopped",
                        (unsigned int)pdu, (unsigned int)old_pdu);

fail_check_scatter:
        sfc_adapter_unlock(sa);

fail_inval:
        sfc_log_init(sa, "failed %d", rc);
        SFC_ASSERT(rc > 0);
        return -rc;
}
static int
sfc_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
        struct sfc_port *port = &sa->port;
        struct rte_ether_addr *old_addr = &dev->data->mac_addrs[0];
        int rc = 0;

        sfc_adapter_lock(sa);

        if (rte_is_same_ether_addr(mac_addr, &port->default_mac_addr))
                goto unlock;

        /*
         * Copy the address to the device private data so that
         * it could be recalled in the case of adapter restart.
         */
        rte_ether_addr_copy(mac_addr, &port->default_mac_addr);

        /*
         * Neither of the two following checks can return
         * an error. The new MAC address is preserved in
         * the device private data and can be activated
         * on the next port start if the user prevents
         * isolated mode from being enabled.
         */
        if (sfc_sa2shared(sa)->isolated) {
                sfc_warn(sa, "isolated mode is active on the port");
                sfc_warn(sa, "will not set MAC address");
                goto unlock;
        }

        if (sa->state != SFC_ETHDEV_STARTED) {
                sfc_notice(sa, "the port is not started");
                sfc_notice(sa, "the new MAC address will be set on port start");

                goto unlock;
        }

        if (encp->enc_allow_set_mac_with_installed_filters) {
                rc = efx_mac_addr_set(sa->nic, mac_addr->addr_bytes);
                if (rc != 0) {
                        sfc_err(sa, "cannot set MAC address (rc = %u)", rc);
                        goto unlock;
                }

                /*
                 * Changing the MAC address by means of MCDI request
                 * has no effect on received traffic, therefore
                 * we also need to update unicast filters
                 */
                rc = sfc_set_rx_mode_unchecked(sa);
                if (rc != 0) {
                        sfc_err(sa, "cannot set filter (rc = %u)", rc);
                        /* Rollback the old address */
                        (void)efx_mac_addr_set(sa->nic, old_addr->addr_bytes);
                        (void)sfc_set_rx_mode_unchecked(sa);
                }
        } else {
                sfc_warn(sa, "cannot set MAC address with filters installed");
                sfc_warn(sa, "adapter will be restarted to pick the new MAC");
                sfc_warn(sa, "(some traffic may be dropped)");

                /*
                 * Since setting MAC address with filters installed is not
                 * allowed on the adapter, the new MAC address will be set
                 * by means of adapter restart. sfc_start() shall retrieve
                 * the new address from the device private data and set it.
                 */
                sfc_stop(sa);
                rc = sfc_start(sa);
                if (rc != 0)
                        sfc_err(sa, "cannot restart adapter (rc = %u)", rc);
        }

unlock:
        if (rc != 0)
                rte_ether_addr_copy(old_addr, &port->default_mac_addr);

        sfc_adapter_unlock(sa);

        SFC_ASSERT(rc >= 0);
        return -rc;
}


static int
sfc_set_mc_addr_list(struct rte_eth_dev *dev,
                struct rte_ether_addr *mc_addr_set, uint32_t nb_mc_addr)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_port *port = &sa->port;
        uint8_t *mc_addrs = port->mcast_addrs;
        int rc;
        unsigned int i;

        if (sfc_sa2shared(sa)->isolated) {
                sfc_err(sa, "isolated mode is active on the port");
                sfc_err(sa, "will not set multicast address list");
                return -ENOTSUP;
        }

        if (mc_addrs == NULL)
                return -ENOBUFS;

        if (nb_mc_addr > port->max_mcast_addrs) {
                sfc_err(sa, "too many multicast addresses: %u > %u",
                         nb_mc_addr, port->max_mcast_addrs);
                return -EINVAL;
        }

        for (i = 0; i < nb_mc_addr; ++i) {
                rte_memcpy(mc_addrs, mc_addr_set[i].addr_bytes,
                                 EFX_MAC_ADDR_LEN);
                mc_addrs += EFX_MAC_ADDR_LEN;
        }

        port->nb_mcast_addrs = nb_mc_addr;

        if (sa->state != SFC_ETHDEV_STARTED)
                return 0;

        rc = efx_mac_multicast_list_set(sa->nic, port->mcast_addrs,
                                        port->nb_mcast_addrs);
        if (rc != 0)
                sfc_err(sa, "cannot set multicast address list (rc = %u)", rc);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

/*
 * The function is used by the secondary process as well. It must not
 * use any process-local pointers from the adapter data.
 */
static void
sfc_rx_queue_info_get(struct rte_eth_dev *dev, uint16_t ethdev_qid,
                      struct rte_eth_rxq_info *qinfo)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        sfc_ethdev_qid_t sfc_ethdev_qid = ethdev_qid;
        struct sfc_rxq_info *rxq_info;

        rxq_info = sfc_rxq_info_by_ethdev_qid(sas, sfc_ethdev_qid);

        qinfo->mp = rxq_info->refill_mb_pool;
        qinfo->conf.rx_free_thresh = rxq_info->refill_threshold;
        qinfo->conf.rx_drop_en = 1;
        qinfo->conf.rx_deferred_start = rxq_info->deferred_start;
        qinfo->conf.offloads = dev->data->dev_conf.rxmode.offloads;
        if (rxq_info->type_flags & EFX_RXQ_FLAG_SCATTER) {
                qinfo->conf.offloads |= RTE_ETH_RX_OFFLOAD_SCATTER;
                qinfo->scattered_rx = 1;
        }
        qinfo->nb_desc = rxq_info->entries;
}

/*
 * The function is used by the secondary process as well. It must not
 * use any process-local pointers from the adapter data.
 */
static void
sfc_tx_queue_info_get(struct rte_eth_dev *dev, uint16_t ethdev_qid,
                      struct rte_eth_txq_info *qinfo)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_txq_info *txq_info;

        SFC_ASSERT(ethdev_qid < sas->ethdev_txq_count);

        txq_info = sfc_txq_info_by_ethdev_qid(sas, ethdev_qid);

        memset(qinfo, 0, sizeof(*qinfo));

        qinfo->conf.offloads = txq_info->offloads;
        qinfo->conf.tx_free_thresh = txq_info->free_thresh;
        qinfo->conf.tx_deferred_start = txq_info->deferred_start;
        qinfo->nb_desc = txq_info->entries;
}

/*
 * The function is used by the secondary process as well. It must not
 * use any process-local pointers from the adapter data.
 */
static uint32_t
sfc_rx_queue_count(void *rx_queue)
{
        struct sfc_dp_rxq *dp_rxq = rx_queue;
        const struct sfc_dp_rx *dp_rx;
        struct sfc_rxq_info *rxq_info;

        dp_rx = sfc_dp_rx_by_dp_rxq(dp_rxq);
        rxq_info = sfc_rxq_info_by_dp_rxq(dp_rxq);

        if ((rxq_info->state & SFC_RXQ_STARTED) == 0)
                return 0;

        return dp_rx->qdesc_npending(dp_rxq);
}

/*
 * The function is used by the secondary process as well. It must not
 * use any process-local pointers from the adapter data.
 */
static int
sfc_rx_descriptor_status(void *queue, uint16_t offset)
{
        struct sfc_dp_rxq *dp_rxq = queue;
        const struct sfc_dp_rx *dp_rx;

        dp_rx = sfc_dp_rx_by_dp_rxq(dp_rxq);

        return dp_rx->qdesc_status(dp_rxq, offset);
}

/*
 * The function is used by the secondary process as well. It must not
 * use any process-local pointers from the adapter data.
 */
static int
sfc_tx_descriptor_status(void *queue, uint16_t offset)
{
        struct sfc_dp_txq *dp_txq = queue;
        const struct sfc_dp_tx *dp_tx;

        dp_tx = sfc_dp_tx_by_dp_txq(dp_txq);

        return dp_tx->qdesc_status(dp_txq, offset);
}

static int
sfc_rx_queue_start(struct rte_eth_dev *dev, uint16_t ethdev_qid)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        sfc_ethdev_qid_t sfc_ethdev_qid = ethdev_qid;
        struct sfc_rxq_info *rxq_info;
        sfc_sw_index_t sw_index;
        int rc;

        sfc_log_init(sa, "RxQ=%u", ethdev_qid);

        sfc_adapter_lock(sa);

        rc = EINVAL;
        if (sa->state != SFC_ETHDEV_STARTED)
                goto fail_not_started;

        rxq_info = sfc_rxq_info_by_ethdev_qid(sas, sfc_ethdev_qid);
        if (rxq_info->state != SFC_RXQ_INITIALIZED)
                goto fail_not_setup;

        sw_index = sfc_rxq_sw_index_by_ethdev_rx_qid(sas, sfc_ethdev_qid);
        rc = sfc_rx_qstart(sa, sw_index);
        if (rc != 0)
                goto fail_rx_qstart;

        rxq_info->deferred_started = B_TRUE;

        sfc_adapter_unlock(sa);

        return 0;

fail_rx_qstart:
fail_not_setup:
fail_not_started:
        sfc_adapter_unlock(sa);
        SFC_ASSERT(rc > 0);
        return -rc;
}

static int
sfc_rx_queue_stop(struct rte_eth_dev *dev, uint16_t ethdev_qid)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        sfc_ethdev_qid_t sfc_ethdev_qid = ethdev_qid;
        struct sfc_rxq_info *rxq_info;
        sfc_sw_index_t sw_index;

        sfc_log_init(sa, "RxQ=%u", ethdev_qid);

        sfc_adapter_lock(sa);

        sw_index = sfc_rxq_sw_index_by_ethdev_rx_qid(sas, sfc_ethdev_qid);
        sfc_rx_qstop(sa, sw_index);

        rxq_info = sfc_rxq_info_by_ethdev_qid(sas, sfc_ethdev_qid);
        rxq_info->deferred_started = B_FALSE;

        sfc_adapter_unlock(sa);

        return 0;
}

static int
sfc_tx_queue_start(struct rte_eth_dev *dev, uint16_t ethdev_qid)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_txq_info *txq_info;
        sfc_sw_index_t sw_index;
        int rc;

        sfc_log_init(sa, "TxQ = %u", ethdev_qid);

        sfc_adapter_lock(sa);

        rc = EINVAL;
        if (sa->state != SFC_ETHDEV_STARTED)
                goto fail_not_started;

        txq_info = sfc_txq_info_by_ethdev_qid(sas, ethdev_qid);
        if (txq_info->state != SFC_TXQ_INITIALIZED)
                goto fail_not_setup;

        sw_index = sfc_txq_sw_index_by_ethdev_tx_qid(sas, ethdev_qid);
        rc = sfc_tx_qstart(sa, sw_index);
        if (rc != 0)
                goto fail_tx_qstart;

        txq_info->deferred_started = B_TRUE;

        sfc_adapter_unlock(sa);
        return 0;

fail_tx_qstart:

fail_not_setup:
fail_not_started:
        sfc_adapter_unlock(sa);
        SFC_ASSERT(rc > 0);
        return -rc;
}

static int
sfc_tx_queue_stop(struct rte_eth_dev *dev, uint16_t ethdev_qid)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_txq_info *txq_info;
        sfc_sw_index_t sw_index;

        sfc_log_init(sa, "TxQ = %u", ethdev_qid);

        sfc_adapter_lock(sa);

        sw_index = sfc_txq_sw_index_by_ethdev_tx_qid(sas, ethdev_qid);
        sfc_tx_qstop(sa, sw_index);

        txq_info = sfc_txq_info_by_ethdev_qid(sas, ethdev_qid);
        txq_info->deferred_started = B_FALSE;

        sfc_adapter_unlock(sa);
        return 0;
}

static efx_tunnel_protocol_t
sfc_tunnel_rte_type_to_efx_udp_proto(enum rte_eth_tunnel_type rte_type)
{
        switch (rte_type) {
        case RTE_ETH_TUNNEL_TYPE_VXLAN:
                return EFX_TUNNEL_PROTOCOL_VXLAN;
        case RTE_ETH_TUNNEL_TYPE_GENEVE:
                return EFX_TUNNEL_PROTOCOL_GENEVE;
        default:
                return EFX_TUNNEL_NPROTOS;
        }
}

enum sfc_udp_tunnel_op_e {
        SFC_UDP_TUNNEL_ADD_PORT,
        SFC_UDP_TUNNEL_DEL_PORT,
};

static int
sfc_dev_udp_tunnel_op(struct rte_eth_dev *dev,
                      struct rte_eth_udp_tunnel *tunnel_udp,
                      enum sfc_udp_tunnel_op_e op)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        efx_tunnel_protocol_t tunnel_proto;
        int rc;

        sfc_log_init(sa, "%s udp_port=%u prot_type=%u",
                     (op == SFC_UDP_TUNNEL_ADD_PORT) ? "add" :
                     (op == SFC_UDP_TUNNEL_DEL_PORT) ? "delete" : "unknown",
                     tunnel_udp->udp_port, tunnel_udp->prot_type);

        tunnel_proto =
                sfc_tunnel_rte_type_to_efx_udp_proto(tunnel_udp->prot_type);
        if (tunnel_proto >= EFX_TUNNEL_NPROTOS) {
                rc = ENOTSUP;
                goto fail_bad_proto;
        }

        sfc_adapter_lock(sa);

        switch (op) {
        case SFC_UDP_TUNNEL_ADD_PORT:
                rc = efx_tunnel_config_udp_add(sa->nic,
                                               tunnel_udp->udp_port,
                                               tunnel_proto);
                break;
        case SFC_UDP_TUNNEL_DEL_PORT:
                rc = efx_tunnel_config_udp_remove(sa->nic,
                                                  tunnel_udp->udp_port,
                                                  tunnel_proto);
                break;
        default:
                rc = EINVAL;
                goto fail_bad_op;
        }

        if (rc != 0)
                goto fail_op;

        if (sa->state == SFC_ETHDEV_STARTED) {
                rc = efx_tunnel_reconfigure(sa->nic);
                if (rc == EAGAIN) {
                        /*
                         * Configuration is accepted by FW and MC reboot
                         * is initiated to apply the changes. MC reboot
                         * will be handled in a usual way (MC reboot
                         * event on management event queue and adapter
                         * restart).
                         */
                        rc = 0;
                } else if (rc != 0) {
                        goto fail_reconfigure;
                }
        }

        sfc_adapter_unlock(sa);
        return 0;

fail_reconfigure:
        /* Remove/restore entry since the change makes the trouble */
        switch (op) {
        case SFC_UDP_TUNNEL_ADD_PORT:
                (void)efx_tunnel_config_udp_remove(sa->nic,
                                                   tunnel_udp->udp_port,
                                                   tunnel_proto);
                break;
        case SFC_UDP_TUNNEL_DEL_PORT:
                (void)efx_tunnel_config_udp_add(sa->nic,
                                                tunnel_udp->udp_port,
                                                tunnel_proto);
                break;
        }

fail_op:
fail_bad_op:
        sfc_adapter_unlock(sa);

fail_bad_proto:
        SFC_ASSERT(rc > 0);
        return -rc;
}

static int
sfc_dev_udp_tunnel_port_add(struct rte_eth_dev *dev,
                            struct rte_eth_udp_tunnel *tunnel_udp)
{
        return sfc_dev_udp_tunnel_op(dev, tunnel_udp, SFC_UDP_TUNNEL_ADD_PORT);
}

static int
sfc_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
                            struct rte_eth_udp_tunnel *tunnel_udp)
{
        return sfc_dev_udp_tunnel_op(dev, tunnel_udp, SFC_UDP_TUNNEL_DEL_PORT);
}

/*
 * The function is used by the secondary process as well. It must not
 * use any process-local pointers from the adapter data.
 */
static int
sfc_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
                          struct rte_eth_rss_conf *rss_conf)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_rss *rss = &sas->rss;

        if (rss->context_type != EFX_RX_SCALE_EXCLUSIVE)
                return -ENOTSUP;

        /*
         * Mapping of hash configuration between RTE and EFX is not one-to-one,
         * hence, conversion is done here to derive a correct set of RTE_ETH_RSS
         * flags which corresponds to the active EFX configuration stored
         * locally in 'sfc_adapter' and kept up-to-date
         */
        rss_conf->rss_hf = sfc_rx_hf_efx_to_rte(rss, rss->hash_types);
        rss_conf->rss_key_len = EFX_RSS_KEY_SIZE;
        if (rss_conf->rss_key != NULL)
                rte_memcpy(rss_conf->rss_key, rss->key, EFX_RSS_KEY_SIZE);

        return 0;
}

static int
sfc_dev_rss_hash_update(struct rte_eth_dev *dev,
                        struct rte_eth_rss_conf *rss_conf)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_rss *rss = &sfc_sa2shared(sa)->rss;
        unsigned int efx_hash_types;
        unsigned int n_contexts;
        unsigned int mode_i = 0;
        unsigned int key_i = 0;
        uint32_t contexts[2];
        unsigned int i = 0;
        int rc = 0;

        if (sfc_sa2shared(sa)->isolated)
                return -ENOTSUP;

        if (rss->context_type != EFX_RX_SCALE_EXCLUSIVE) {
                sfc_err(sa, "RSS is not available");
                return -ENOTSUP;
        }

        if (rss->channels == 0) {
                sfc_err(sa, "RSS is not configured");
                return -EINVAL;
        }

        if ((rss_conf->rss_key != NULL) &&
            (rss_conf->rss_key_len != sizeof(rss->key))) {
                sfc_err(sa, "RSS key size is wrong (should be %zu)",
                        sizeof(rss->key));
                return -EINVAL;
        }

        sfc_adapter_lock(sa);

        rc = sfc_rx_hf_rte_to_efx(sa, rss_conf->rss_hf, &efx_hash_types);
        if (rc != 0)
                goto fail_rx_hf_rte_to_efx;

        contexts[0] = EFX_RSS_CONTEXT_DEFAULT;
        contexts[1] = rss->dummy_ctx.nic_handle;
        n_contexts = (rss->dummy_ctx.nic_handle_refcnt == 0) ? 1 : 2;

        for (mode_i = 0; mode_i < n_contexts; mode_i++) {
                rc = efx_rx_scale_mode_set(sa->nic, contexts[mode_i],
                                           rss->hash_alg, efx_hash_types,
                                           B_TRUE);
                if (rc != 0)
                        goto fail_scale_mode_set;
        }

        if (rss_conf->rss_key != NULL) {
                if (sa->state == SFC_ETHDEV_STARTED) {
                        for (key_i = 0; key_i < n_contexts; key_i++) {
                                rc = efx_rx_scale_key_set(sa->nic,
                                                          contexts[key_i],
                                                          rss_conf->rss_key,
                                                          sizeof(rss->key));
                                if (rc != 0)
                                        goto fail_scale_key_set;
                        }
                }

                rte_memcpy(rss->key, rss_conf->rss_key, sizeof(rss->key));
        }

        rss->hash_types = efx_hash_types;

        sfc_adapter_unlock(sa);

        return 0;

fail_scale_key_set:
        for (i = 0; i < key_i; i++) {
                if (efx_rx_scale_key_set(sa->nic, contexts[i], rss->key,
                                         sizeof(rss->key)) != 0)
                        sfc_err(sa, "failed to restore RSS key");
        }

fail_scale_mode_set:
        for (i = 0; i < mode_i; i++) {
                if (efx_rx_scale_mode_set(sa->nic, contexts[i],
                                          EFX_RX_HASHALG_TOEPLITZ,
                                          rss->hash_types, B_TRUE) != 0)
                        sfc_err(sa, "failed to restore RSS mode");
        }

fail_rx_hf_rte_to_efx:
        sfc_adapter_unlock(sa);
        return -rc;
}

/*
 * The function is used by the secondary process as well. It must not
 * use any process-local pointers from the adapter data.
 */
static int
sfc_dev_rss_reta_query(struct rte_eth_dev *dev,
                       struct rte_eth_rss_reta_entry64 *reta_conf,
                       uint16_t reta_size)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_rss *rss = &sas->rss;
        int entry;

        if (rss->context_type != EFX_RX_SCALE_EXCLUSIVE || sas->isolated)
                return -ENOTSUP;

        if (rss->channels == 0)
                return -EINVAL;

        if (reta_size != EFX_RSS_TBL_SIZE)
                return -EINVAL;

        for (entry = 0; entry < reta_size; entry++) {
                int grp = entry / RTE_ETH_RETA_GROUP_SIZE;
                int grp_idx = entry % RTE_ETH_RETA_GROUP_SIZE;

                if ((reta_conf[grp].mask >> grp_idx) & 1)
                        reta_conf[grp].reta[grp_idx] = rss->tbl[entry];
        }

        return 0;
}

static int
sfc_dev_rss_reta_update(struct rte_eth_dev *dev,
                        struct rte_eth_rss_reta_entry64 *reta_conf,
                        uint16_t reta_size)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_rss *rss = &sfc_sa2shared(sa)->rss;
        unsigned int *rss_tbl_new;
        uint16_t entry;
        int rc = 0;


        if (sfc_sa2shared(sa)->isolated)
                return -ENOTSUP;

        if (rss->context_type != EFX_RX_SCALE_EXCLUSIVE) {
                sfc_err(sa, "RSS is not available");
                return -ENOTSUP;
        }

        if (rss->channels == 0) {
                sfc_err(sa, "RSS is not configured");
                return -EINVAL;
        }

        if (reta_size != EFX_RSS_TBL_SIZE) {
                sfc_err(sa, "RETA size is wrong (should be %u)",
                        EFX_RSS_TBL_SIZE);
                return -EINVAL;
        }

        rss_tbl_new = rte_zmalloc("rss_tbl_new", sizeof(rss->tbl), 0);
        if (rss_tbl_new == NULL)
                return -ENOMEM;

        sfc_adapter_lock(sa);

        rte_memcpy(rss_tbl_new, rss->tbl, sizeof(rss->tbl));

        for (entry = 0; entry < reta_size; entry++) {
                int grp_idx = entry % RTE_ETH_RETA_GROUP_SIZE;
                struct rte_eth_rss_reta_entry64 *grp;

                grp = &reta_conf[entry / RTE_ETH_RETA_GROUP_SIZE];

                if (grp->mask & (1ull << grp_idx)) {
                        if (grp->reta[grp_idx] >= rss->channels) {
                                rc = EINVAL;
                                goto bad_reta_entry;
                        }
                        rss_tbl_new[entry] = grp->reta[grp_idx];
                }
        }

        if (sa->state == SFC_ETHDEV_STARTED) {
                rc = efx_rx_scale_tbl_set(sa->nic, EFX_RSS_CONTEXT_DEFAULT,
                                          rss_tbl_new, EFX_RSS_TBL_SIZE);
                if (rc != 0)
                        goto fail_scale_tbl_set;
        }

        rte_memcpy(rss->tbl, rss_tbl_new, sizeof(rss->tbl));

fail_scale_tbl_set:
bad_reta_entry:
        sfc_adapter_unlock(sa);

        rte_free(rss_tbl_new);

        SFC_ASSERT(rc >= 0);
        return -rc;
}

static int
sfc_dev_flow_ops_get(struct rte_eth_dev *dev __rte_unused,
                     const struct rte_flow_ops **ops)
{
        *ops = &sfc_flow_ops;
        return 0;
}

static int
sfc_pool_ops_supported(struct rte_eth_dev *dev, const char *pool)
{
        const struct sfc_adapter_priv *sap = sfc_adapter_priv_by_eth_dev(dev);

        /*
         * If Rx datapath does not provide callback to check mempool,
         * all pools are supported.
         */
        if (sap->dp_rx->pool_ops_supported == NULL)
                return 1;

        return sap->dp_rx->pool_ops_supported(pool);
}

static int
sfc_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t ethdev_qid)
{
        const struct sfc_adapter_priv *sap = sfc_adapter_priv_by_eth_dev(dev);
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        sfc_ethdev_qid_t sfc_ethdev_qid = ethdev_qid;
        struct sfc_rxq_info *rxq_info;

        rxq_info = sfc_rxq_info_by_ethdev_qid(sas, sfc_ethdev_qid);

        return sap->dp_rx->intr_enable(rxq_info->dp);
}

static int
sfc_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t ethdev_qid)
{
        const struct sfc_adapter_priv *sap = sfc_adapter_priv_by_eth_dev(dev);
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        sfc_ethdev_qid_t sfc_ethdev_qid = ethdev_qid;
        struct sfc_rxq_info *rxq_info;

        rxq_info = sfc_rxq_info_by_ethdev_qid(sas, sfc_ethdev_qid);

        return sap->dp_rx->intr_disable(rxq_info->dp);
}

struct sfc_mport_journal_ctx {
        struct sfc_adapter              *sa;
        uint16_t                        switch_domain_id;
        uint32_t                        mcdi_handle;
        bool                            controllers_assigned;
        efx_pcie_interface_t            *controllers;
        size_t                          nb_controllers;
};

static int
sfc_journal_ctx_add_controller(struct sfc_mport_journal_ctx *ctx,
                               efx_pcie_interface_t intf)
{
        efx_pcie_interface_t *new_controllers;
        size_t i, target;
        size_t new_size;

        if (ctx->controllers == NULL) {
                ctx->controllers = rte_malloc("sfc_controller_mapping",
                                              sizeof(ctx->controllers[0]), 0);
                if (ctx->controllers == NULL)
                        return ENOMEM;

                ctx->controllers[0] = intf;
                ctx->nb_controllers = 1;

                return 0;
        }

        for (i = 0; i < ctx->nb_controllers; i++) {
                if (ctx->controllers[i] == intf)
                        return 0;
                if (ctx->controllers[i] > intf)
                        break;
        }
        target = i;

        ctx->nb_controllers += 1;
        new_size = ctx->nb_controllers * sizeof(ctx->controllers[0]);

        new_controllers = rte_realloc(ctx->controllers, new_size, 0);
        if (new_controllers == NULL) {
                rte_free(ctx->controllers);
                return ENOMEM;
        }
        ctx->controllers = new_controllers;

        for (i = target + 1; i < ctx->nb_controllers; i++)
                ctx->controllers[i] = ctx->controllers[i - 1];

        ctx->controllers[target] = intf;

        return 0;
}

static efx_rc_t
sfc_process_mport_journal_entry(struct sfc_mport_journal_ctx *ctx,
                                efx_mport_desc_t *mport)
{
        struct sfc_mae_switch_port_request req;
        efx_mport_sel_t entity_selector;
        efx_mport_sel_t ethdev_mport;
        uint16_t switch_port_id;
        efx_rc_t efx_rc;
        int rc;

        sfc_dbg(ctx->sa,
                "processing mport id %u (controller %u pf %u vf %u)",
                mport->emd_id.id, mport->emd_vnic.ev_intf,
                mport->emd_vnic.ev_pf, mport->emd_vnic.ev_vf);
        efx_mae_mport_invalid(&ethdev_mport);

        if (!ctx->controllers_assigned) {
                rc = sfc_journal_ctx_add_controller(ctx,
                                                    mport->emd_vnic.ev_intf);
                if (rc != 0)
                        return rc;
        }

        /* Build Mport selector */
        efx_rc = efx_mae_mport_by_pcie_mh_function(mport->emd_vnic.ev_intf,
                                                mport->emd_vnic.ev_pf,
                                                mport->emd_vnic.ev_vf,
                                                &entity_selector);
        if (efx_rc != 0) {
                sfc_err(ctx->sa, "failed to build entity mport selector for c%upf%uvf%u",
                        mport->emd_vnic.ev_intf,
                        mport->emd_vnic.ev_pf,
                        mport->emd_vnic.ev_vf);

                return efx_rc;
        }

        rc = sfc_mae_switch_port_id_by_entity(ctx->switch_domain_id,
                                              &entity_selector,
                                              SFC_MAE_SWITCH_PORT_REPRESENTOR,
                                              &switch_port_id);
        switch (rc) {
        case 0:
                /* Already registered */
                break;
        case ENOENT:
                /*
                 * No representor has been created for this entity.
                 * Create a dummy switch registry entry with an invalid ethdev
                 * mport selector. When a corresponding representor is created,
                 * this entry will be updated.
                 */
                req.type = SFC_MAE_SWITCH_PORT_REPRESENTOR;
                req.entity_mportp = &entity_selector;
                req.ethdev_mportp = &ethdev_mport;
                req.ethdev_port_id = RTE_MAX_ETHPORTS;
                req.port_data.repr.intf = mport->emd_vnic.ev_intf;
                req.port_data.repr.pf = mport->emd_vnic.ev_pf;
                req.port_data.repr.vf = mport->emd_vnic.ev_vf;

                rc = sfc_mae_assign_switch_port(ctx->switch_domain_id,
                                                &req, &switch_port_id);
                if (rc != 0) {
                        sfc_err(ctx->sa,
                                "failed to assign MAE switch port for c%upf%uvf%u: %s",
                                mport->emd_vnic.ev_intf,
                                mport->emd_vnic.ev_pf,
                                mport->emd_vnic.ev_vf,
                                rte_strerror(rc));
                        return rc;
                }
                break;
        default:
                sfc_err(ctx->sa, "failed to find MAE switch port for c%upf%uvf%u: %s",
                        mport->emd_vnic.ev_intf,
                        mport->emd_vnic.ev_pf,
                        mport->emd_vnic.ev_vf,
                        rte_strerror(rc));
                return rc;
        }

        return 0;
}

static efx_rc_t
sfc_process_mport_journal_cb(void *data, efx_mport_desc_t *mport,
                             size_t mport_len)
{
        struct sfc_mport_journal_ctx *ctx = data;

        if (ctx == NULL || ctx->sa == NULL) {
                sfc_err(ctx->sa, "received NULL context or SFC adapter");
                return EINVAL;
        }

        if (mport_len != sizeof(*mport)) {
                sfc_err(ctx->sa, "actual and expected mport buffer sizes differ");
                return EINVAL;
        }

        SFC_ASSERT(sfc_adapter_is_locked(ctx->sa));

        /*
         * If a zombie flag is set, it means the mport has been marked for
         * deletion and cannot be used for any new operations. The mport will
         * be destroyed completely once all references to it are released.
         */
        if (mport->emd_zombie) {
                sfc_dbg(ctx->sa, "mport is a zombie, skipping");
                return 0;
        }
        if (mport->emd_type != EFX_MPORT_TYPE_VNIC) {
                sfc_dbg(ctx->sa, "mport is not a VNIC, skipping");
                return 0;
        }
        if (mport->emd_vnic.ev_client_type != EFX_MPORT_VNIC_CLIENT_FUNCTION) {
                sfc_dbg(ctx->sa, "mport is not a function, skipping");
                return 0;
        }
        if (mport->emd_vnic.ev_handle == ctx->mcdi_handle) {
                sfc_dbg(ctx->sa, "mport is this driver instance, skipping");
                return 0;
        }

        return sfc_process_mport_journal_entry(ctx, mport);
}

static int
sfc_process_mport_journal(struct sfc_adapter *sa)
{
        struct sfc_mport_journal_ctx ctx;
        const efx_pcie_interface_t *controllers;
        size_t nb_controllers;
        efx_rc_t efx_rc;
        int rc;

        memset(&ctx, 0, sizeof(ctx));
        ctx.sa = sa;
        ctx.switch_domain_id = sa->mae.switch_domain_id;

        efx_rc = efx_mcdi_get_own_client_handle(sa->nic, &ctx.mcdi_handle);
        if (efx_rc != 0) {
                sfc_err(sa, "failed to get own MCDI handle");
                SFC_ASSERT(efx_rc > 0);
                return efx_rc;
        }

        rc = sfc_mae_switch_domain_controllers(ctx.switch_domain_id,
                                               &controllers, &nb_controllers);
        if (rc != 0) {
                sfc_err(sa, "failed to get controller mapping");
                return rc;
        }

        ctx.controllers_assigned = controllers != NULL;
        ctx.controllers = NULL;
        ctx.nb_controllers = 0;

        efx_rc = efx_mae_read_mport_journal(sa->nic,
                                            sfc_process_mport_journal_cb, &ctx);
        if (efx_rc != 0) {
                sfc_err(sa, "failed to process MAE mport journal");
                SFC_ASSERT(efx_rc > 0);
                return efx_rc;
        }

        if (controllers == NULL) {
                rc = sfc_mae_switch_domain_map_controllers(ctx.switch_domain_id,
                                                           ctx.controllers,
                                                           ctx.nb_controllers);
                if (rc != 0)
                        return rc;
        }

        return 0;
}

static void
sfc_count_representors_cb(enum sfc_mae_switch_port_type type,
                          const efx_mport_sel_t *ethdev_mportp __rte_unused,
                          uint16_t ethdev_port_id __rte_unused,
                          const efx_mport_sel_t *entity_mportp __rte_unused,
                          uint16_t switch_port_id __rte_unused,
                          union sfc_mae_switch_port_data *port_datap
                                __rte_unused,
                          void *user_datap)
{
        int *counter = user_datap;

        SFC_ASSERT(counter != NULL);

        if (type == SFC_MAE_SWITCH_PORT_REPRESENTOR)
                (*counter)++;
}

struct sfc_get_representors_ctx {
        struct rte_eth_representor_info *info;
        struct sfc_adapter              *sa;
        uint16_t                        switch_domain_id;
        const efx_pcie_interface_t      *controllers;
        size_t                          nb_controllers;
};

static void
sfc_get_representors_cb(enum sfc_mae_switch_port_type type,
                        const efx_mport_sel_t *ethdev_mportp __rte_unused,
                        uint16_t ethdev_port_id __rte_unused,
                        const efx_mport_sel_t *entity_mportp __rte_unused,
                        uint16_t switch_port_id,
                        union sfc_mae_switch_port_data *port_datap,
                        void *user_datap)
{
        struct sfc_get_representors_ctx *ctx = user_datap;
        struct rte_eth_representor_range *range;
        int ret;
        int rc;

        SFC_ASSERT(ctx != NULL);
        SFC_ASSERT(ctx->info != NULL);
        SFC_ASSERT(ctx->sa != NULL);

        if (type != SFC_MAE_SWITCH_PORT_REPRESENTOR) {
                sfc_dbg(ctx->sa, "not a representor, skipping");
                return;
        }
        if (ctx->info->nb_ranges >= ctx->info->nb_ranges_alloc) {
                sfc_dbg(ctx->sa, "info structure is full already");
                return;
        }

        range = &ctx->info->ranges[ctx->info->nb_ranges];
        rc = sfc_mae_switch_controller_from_mapping(ctx->controllers,
                                                    ctx->nb_controllers,
                                                    port_datap->repr.intf,
                                                    &range->controller);
        if (rc != 0) {
                sfc_err(ctx->sa, "invalid representor controller: %d",
                        port_datap->repr.intf);
                range->controller = -1;
        }
        range->pf = port_datap->repr.pf;
        range->id_base = switch_port_id;
        range->id_end = switch_port_id;

        if (port_datap->repr.vf != EFX_PCI_VF_INVALID) {
                range->type = RTE_ETH_REPRESENTOR_VF;
                range->vf = port_datap->repr.vf;
                ret = snprintf(range->name, RTE_DEV_NAME_MAX_LEN,
                               "c%dpf%dvf%d", range->controller, range->pf,
                               range->vf);
        } else {
                range->type = RTE_ETH_REPRESENTOR_PF;
                ret = snprintf(range->name, RTE_DEV_NAME_MAX_LEN,
                         "c%dpf%d", range->controller, range->pf);
        }
        if (ret >= RTE_DEV_NAME_MAX_LEN) {
                sfc_err(ctx->sa, "representor name has been truncated: %s",
                        range->name);
        }

        ctx->info->nb_ranges++;
}

static int
sfc_representor_info_get(struct rte_eth_dev *dev,
                         struct rte_eth_representor_info *info)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_get_representors_ctx get_repr_ctx;
        const efx_nic_cfg_t *nic_cfg;
        uint16_t switch_domain_id;
        uint32_t nb_repr;
        int controller;
        int rc;

        sfc_adapter_lock(sa);

        if (sa->mae.status != SFC_MAE_STATUS_ADMIN) {
                sfc_adapter_unlock(sa);
                return -ENOTSUP;
        }

        rc = sfc_process_mport_journal(sa);
        if (rc != 0) {
                sfc_adapter_unlock(sa);
                SFC_ASSERT(rc > 0);
                return -rc;
        }

        switch_domain_id = sa->mae.switch_domain_id;

        nb_repr = 0;
        rc = sfc_mae_switch_ports_iterate(switch_domain_id,
                                          sfc_count_representors_cb,
                                          &nb_repr);
        if (rc != 0) {
                sfc_adapter_unlock(sa);
                SFC_ASSERT(rc > 0);
                return -rc;
        }

        if (info == NULL) {
                sfc_adapter_unlock(sa);
                return nb_repr;
        }

        rc = sfc_mae_switch_domain_controllers(switch_domain_id,
                                               &get_repr_ctx.controllers,
                                               &get_repr_ctx.nb_controllers);
        if (rc != 0) {
                sfc_adapter_unlock(sa);
                SFC_ASSERT(rc > 0);
                return -rc;
        }

        nic_cfg = efx_nic_cfg_get(sa->nic);

        rc = sfc_mae_switch_domain_get_controller(switch_domain_id,
                                                  nic_cfg->enc_intf,
                                                  &controller);
        if (rc != 0) {
                sfc_err(sa, "invalid controller: %d", nic_cfg->enc_intf);
                controller = -1;
        }

        info->controller = controller;
        info->pf = nic_cfg->enc_pf;

        get_repr_ctx.info = info;
        get_repr_ctx.sa = sa;
        get_repr_ctx.switch_domain_id = switch_domain_id;
        rc = sfc_mae_switch_ports_iterate(switch_domain_id,
                                          sfc_get_representors_cb,
                                          &get_repr_ctx);
        if (rc != 0) {
                sfc_adapter_unlock(sa);
                SFC_ASSERT(rc > 0);
                return -rc;
        }

        sfc_adapter_unlock(sa);
        return nb_repr;
}

static int
sfc_rx_metadata_negotiate(struct rte_eth_dev *dev, uint64_t *features)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        uint64_t supported = 0;

        sfc_adapter_lock(sa);

        if ((sa->priv.dp_rx->features & SFC_DP_RX_FEAT_FLOW_FLAG) != 0)
                supported |= RTE_ETH_RX_METADATA_USER_FLAG;

        if ((sa->priv.dp_rx->features & SFC_DP_RX_FEAT_FLOW_MARK) != 0)
                supported |= RTE_ETH_RX_METADATA_USER_MARK;

        if (sfc_ft_is_supported(sa))
                supported |= RTE_ETH_RX_METADATA_TUNNEL_ID;

        sa->negotiated_rx_metadata = supported & *features;
        *features = sa->negotiated_rx_metadata;

        sfc_adapter_unlock(sa);

        return 0;
}

static const struct eth_dev_ops sfc_eth_dev_ops = {
        .dev_configure                  = sfc_dev_configure,
        .dev_start                      = sfc_dev_start,
        .dev_stop                       = sfc_dev_stop,
        .dev_set_link_up                = sfc_dev_set_link_up,
        .dev_set_link_down              = sfc_dev_set_link_down,
        .dev_close                      = sfc_dev_close,
        .promiscuous_enable             = sfc_dev_promisc_enable,
        .promiscuous_disable            = sfc_dev_promisc_disable,
        .allmulticast_enable            = sfc_dev_allmulti_enable,
        .allmulticast_disable           = sfc_dev_allmulti_disable,
        .link_update                    = sfc_dev_link_update,
        .stats_get                      = sfc_stats_get,
        .stats_reset                    = sfc_stats_reset,
        .xstats_get                     = sfc_xstats_get,
        .xstats_reset                   = sfc_stats_reset,
        .xstats_get_names               = sfc_xstats_get_names,
        .dev_infos_get                  = sfc_dev_infos_get,
        .dev_supported_ptypes_get       = sfc_dev_supported_ptypes_get,
        .mtu_set                        = sfc_dev_set_mtu,
        .rx_queue_start                 = sfc_rx_queue_start,
        .rx_queue_stop                  = sfc_rx_queue_stop,
        .tx_queue_start                 = sfc_tx_queue_start,
        .tx_queue_stop                  = sfc_tx_queue_stop,
        .rx_queue_setup                 = sfc_rx_queue_setup,
        .rx_queue_release               = sfc_rx_queue_release,
        .rx_queue_intr_enable           = sfc_rx_queue_intr_enable,
        .rx_queue_intr_disable          = sfc_rx_queue_intr_disable,
        .tx_queue_setup                 = sfc_tx_queue_setup,
        .tx_queue_release               = sfc_tx_queue_release,
        .flow_ctrl_get                  = sfc_flow_ctrl_get,
        .flow_ctrl_set                  = sfc_flow_ctrl_set,
        .mac_addr_set                   = sfc_mac_addr_set,
        .udp_tunnel_port_add            = sfc_dev_udp_tunnel_port_add,
        .udp_tunnel_port_del            = sfc_dev_udp_tunnel_port_del,
        .reta_update                    = sfc_dev_rss_reta_update,
        .reta_query                     = sfc_dev_rss_reta_query,
        .rss_hash_update                = sfc_dev_rss_hash_update,
        .rss_hash_conf_get              = sfc_dev_rss_hash_conf_get,
        .flow_ops_get                   = sfc_dev_flow_ops_get,
        .set_mc_addr_list               = sfc_set_mc_addr_list,
        .rxq_info_get                   = sfc_rx_queue_info_get,
        .txq_info_get                   = sfc_tx_queue_info_get,
        .fw_version_get                 = sfc_fw_version_get,
        .xstats_get_by_id               = sfc_xstats_get_by_id,
        .xstats_get_names_by_id         = sfc_xstats_get_names_by_id,
        .pool_ops_supported             = sfc_pool_ops_supported,
        .representor_info_get           = sfc_representor_info_get,
        .rx_metadata_negotiate          = sfc_rx_metadata_negotiate,
};

struct sfc_ethdev_init_data {
        uint16_t                nb_representors;
};

/**
 * Duplicate a string in potentially shared memory required for
 * multi-process support.
 *
 * strdup() allocates from process-local heap/memory.
 */
static char *
sfc_strdup(const char *str)
{
        size_t size;
        char *copy;

        if (str == NULL)
                return NULL;

        size = strlen(str) + 1;
        copy = rte_malloc(__func__, size, 0);
        if (copy != NULL)
                rte_memcpy(copy, str, size);

        return copy;
}

static int
sfc_eth_dev_set_ops(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        const struct sfc_dp_rx *dp_rx;
        const struct sfc_dp_tx *dp_tx;
        const efx_nic_cfg_t *encp;
        unsigned int avail_caps = 0;
        const char *rx_name = NULL;
        const char *tx_name = NULL;
        int rc;

        switch (sa->family) {
        case EFX_FAMILY_HUNTINGTON:
        case EFX_FAMILY_MEDFORD:
        case EFX_FAMILY_MEDFORD2:
                avail_caps |= SFC_DP_HW_FW_CAP_EF10;
                avail_caps |= SFC_DP_HW_FW_CAP_RX_EFX;
                avail_caps |= SFC_DP_HW_FW_CAP_TX_EFX;
                break;
        case EFX_FAMILY_RIVERHEAD:
                avail_caps |= SFC_DP_HW_FW_CAP_EF100;
                break;
        default:
                break;
        }

        encp = efx_nic_cfg_get(sa->nic);
        if (encp->enc_rx_es_super_buffer_supported)
                avail_caps |= SFC_DP_HW_FW_CAP_RX_ES_SUPER_BUFFER;

        rc = sfc_kvargs_process(sa, SFC_KVARG_RX_DATAPATH,
                                sfc_kvarg_string_handler, &rx_name);
        if (rc != 0)
                goto fail_kvarg_rx_datapath;

        if (rx_name != NULL) {
                dp_rx = sfc_dp_find_rx_by_name(&sfc_dp_head, rx_name);
                if (dp_rx == NULL) {
                        sfc_err(sa, "Rx datapath %s not found", rx_name);
                        rc = ENOENT;
                        goto fail_dp_rx;
                }
                if (!sfc_dp_match_hw_fw_caps(&dp_rx->dp, avail_caps)) {
                        sfc_err(sa,
                                "Insufficient Hw/FW capabilities to use Rx datapath %s",
                                rx_name);
                        rc = EINVAL;
                        goto fail_dp_rx_caps;
                }
        } else {
                dp_rx = sfc_dp_find_rx_by_caps(&sfc_dp_head, avail_caps);
                if (dp_rx == NULL) {
                        sfc_err(sa, "Rx datapath by caps %#x not found",
                                avail_caps);
                        rc = ENOENT;
                        goto fail_dp_rx;
                }
        }

        sas->dp_rx_name = sfc_strdup(dp_rx->dp.name);
        if (sas->dp_rx_name == NULL) {
                rc = ENOMEM;
                goto fail_dp_rx_name;
        }

        if (strcmp(dp_rx->dp.name, SFC_KVARG_DATAPATH_EF10_ESSB) == 0) {
                /* FLAG and MARK are always available from Rx prefix. */
                sa->negotiated_rx_metadata |= RTE_ETH_RX_METADATA_USER_FLAG;
                sa->negotiated_rx_metadata |= RTE_ETH_RX_METADATA_USER_MARK;
        }

        sfc_notice(sa, "use %s Rx datapath", sas->dp_rx_name);

        rc = sfc_kvargs_process(sa, SFC_KVARG_TX_DATAPATH,
                                sfc_kvarg_string_handler, &tx_name);
        if (rc != 0)
                goto fail_kvarg_tx_datapath;

        if (tx_name != NULL) {
                dp_tx = sfc_dp_find_tx_by_name(&sfc_dp_head, tx_name);
                if (dp_tx == NULL) {
                        sfc_err(sa, "Tx datapath %s not found", tx_name);
                        rc = ENOENT;
                        goto fail_dp_tx;
                }
                if (!sfc_dp_match_hw_fw_caps(&dp_tx->dp, avail_caps)) {
                        sfc_err(sa,
                                "Insufficient Hw/FW capabilities to use Tx datapath %s",
                                tx_name);
                        rc = EINVAL;
                        goto fail_dp_tx_caps;
                }
        } else {
                dp_tx = sfc_dp_find_tx_by_caps(&sfc_dp_head, avail_caps);
                if (dp_tx == NULL) {
                        sfc_err(sa, "Tx datapath by caps %#x not found",
                                avail_caps);
                        rc = ENOENT;
                        goto fail_dp_tx;
                }
        }

        sas->dp_tx_name = sfc_strdup(dp_tx->dp.name);
        if (sas->dp_tx_name == NULL) {
                rc = ENOMEM;
                goto fail_dp_tx_name;
        }

        sfc_notice(sa, "use %s Tx datapath", sas->dp_tx_name);

        sa->priv.dp_rx = dp_rx;
        sa->priv.dp_tx = dp_tx;

        dev->rx_pkt_burst = dp_rx->pkt_burst;
        dev->tx_pkt_prepare = dp_tx->pkt_prepare;
        dev->tx_pkt_burst = dp_tx->pkt_burst;

        dev->rx_queue_count = sfc_rx_queue_count;
        dev->rx_descriptor_status = sfc_rx_descriptor_status;
        dev->tx_descriptor_status = sfc_tx_descriptor_status;
        dev->dev_ops = &sfc_eth_dev_ops;

        return 0;

fail_dp_tx_name:
fail_dp_tx_caps:
fail_dp_tx:
fail_kvarg_tx_datapath:
        rte_free(sas->dp_rx_name);
        sas->dp_rx_name = NULL;

fail_dp_rx_name:
fail_dp_rx_caps:
fail_dp_rx:
fail_kvarg_rx_datapath:
        return rc;
}

static void
sfc_eth_dev_clear_ops(struct rte_eth_dev *dev)
{
        struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);

        dev->dev_ops = NULL;
        dev->tx_pkt_prepare = NULL;
        dev->rx_pkt_burst = NULL;
        dev->tx_pkt_burst = NULL;

        rte_free(sas->dp_tx_name);
        sas->dp_tx_name = NULL;
        sa->priv.dp_tx = NULL;

        rte_free(sas->dp_rx_name);
        sas->dp_rx_name = NULL;
        sa->priv.dp_rx = NULL;
}

static const struct eth_dev_ops sfc_eth_dev_secondary_ops = {
        .dev_supported_ptypes_get       = sfc_dev_supported_ptypes_get,
        .reta_query                     = sfc_dev_rss_reta_query,
        .rss_hash_conf_get              = sfc_dev_rss_hash_conf_get,
        .rxq_info_get                   = sfc_rx_queue_info_get,
        .txq_info_get                   = sfc_tx_queue_info_get,
};

static int
sfc_eth_dev_secondary_init(struct rte_eth_dev *dev, uint32_t logtype_main)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct sfc_adapter_priv *sap;
        const struct sfc_dp_rx *dp_rx;
        const struct sfc_dp_tx *dp_tx;
        int rc;

        /*
         * Allocate process private data from heap, since it should not
         * be located in shared memory allocated using rte_malloc() API.
         */
        sap = calloc(1, sizeof(*sap));
        if (sap == NULL) {
                rc = ENOMEM;
                goto fail_alloc_priv;
        }

        sap->logtype_main = logtype_main;

        dp_rx = sfc_dp_find_rx_by_name(&sfc_dp_head, sas->dp_rx_name);
        if (dp_rx == NULL) {
                SFC_LOG(sas, RTE_LOG_ERR, logtype_main,
                        "cannot find %s Rx datapath", sas->dp_rx_name);
                rc = ENOENT;
                goto fail_dp_rx;
        }
        if (~dp_rx->features & SFC_DP_RX_FEAT_MULTI_PROCESS) {
                SFC_LOG(sas, RTE_LOG_ERR, logtype_main,
                        "%s Rx datapath does not support multi-process",
                        sas->dp_rx_name);
                rc = EINVAL;
                goto fail_dp_rx_multi_process;
        }

        dp_tx = sfc_dp_find_tx_by_name(&sfc_dp_head, sas->dp_tx_name);
        if (dp_tx == NULL) {
                SFC_LOG(sas, RTE_LOG_ERR, logtype_main,
                        "cannot find %s Tx datapath", sas->dp_tx_name);
                rc = ENOENT;
                goto fail_dp_tx;
        }
        if (~dp_tx->features & SFC_DP_TX_FEAT_MULTI_PROCESS) {
                SFC_LOG(sas, RTE_LOG_ERR, logtype_main,
                        "%s Tx datapath does not support multi-process",
                        sas->dp_tx_name);
                rc = EINVAL;
                goto fail_dp_tx_multi_process;
        }

        sap->dp_rx = dp_rx;
        sap->dp_tx = dp_tx;

        dev->process_private = sap;
        dev->rx_pkt_burst = dp_rx->pkt_burst;
        dev->tx_pkt_prepare = dp_tx->pkt_prepare;
        dev->tx_pkt_burst = dp_tx->pkt_burst;
        dev->rx_queue_count = sfc_rx_queue_count;
        dev->rx_descriptor_status = sfc_rx_descriptor_status;
        dev->tx_descriptor_status = sfc_tx_descriptor_status;
        dev->dev_ops = &sfc_eth_dev_secondary_ops;

        return 0;

fail_dp_tx_multi_process:
fail_dp_tx:
fail_dp_rx_multi_process:
fail_dp_rx:
        free(sap);

fail_alloc_priv:
        return rc;
}

static void
sfc_register_dp(void)
{
        /* Register once */
        if (TAILQ_EMPTY(&sfc_dp_head)) {
                /* Prefer EF10 datapath */
                sfc_dp_register(&sfc_dp_head, &sfc_ef100_rx.dp);
                sfc_dp_register(&sfc_dp_head, &sfc_ef10_essb_rx.dp);
                sfc_dp_register(&sfc_dp_head, &sfc_ef10_rx.dp);
                sfc_dp_register(&sfc_dp_head, &sfc_efx_rx.dp);

                sfc_dp_register(&sfc_dp_head, &sfc_ef100_tx.dp);
                sfc_dp_register(&sfc_dp_head, &sfc_ef10_tx.dp);
                sfc_dp_register(&sfc_dp_head, &sfc_efx_tx.dp);
                sfc_dp_register(&sfc_dp_head, &sfc_ef10_simple_tx.dp);
        }
}

static int
sfc_parse_switch_mode(struct sfc_adapter *sa, bool has_representors)
{
        const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
        const char *switch_mode = NULL;
        int rc;

        sfc_log_init(sa, "entry");

        rc = sfc_kvargs_process(sa, SFC_KVARG_SWITCH_MODE,
                                sfc_kvarg_string_handler, &switch_mode);
        if (rc != 0)
                goto fail_kvargs;

        if (switch_mode == NULL) {
                sa->switchdev = encp->enc_mae_admin &&
                                (!encp->enc_datapath_cap_evb ||
                                 has_representors);
        } else if (strcasecmp(switch_mode, SFC_KVARG_SWITCH_MODE_LEGACY) == 0) {
                sa->switchdev = false;
        } else if (strcasecmp(switch_mode,
                              SFC_KVARG_SWITCH_MODE_SWITCHDEV) == 0) {
                sa->switchdev = true;
        } else {
                sfc_err(sa, "invalid switch mode device argument '%s'",
                        switch_mode);
                rc = EINVAL;
                goto fail_mode;
        }

        sfc_log_init(sa, "done");

        return 0;

fail_mode:
fail_kvargs:
        sfc_log_init(sa, "failed: %s", rte_strerror(rc));

        return rc;
}

static int
sfc_eth_dev_init(struct rte_eth_dev *dev, void *init_params)
{
        struct sfc_adapter_shared *sas = sfc_adapter_shared_by_eth_dev(dev);
        struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
        struct sfc_ethdev_init_data *init_data = init_params;
        uint32_t logtype_main;
        struct sfc_adapter *sa;
        int rc;
        const efx_nic_cfg_t *encp;
        const struct rte_ether_addr *from;
        int ret;

        if (sfc_efx_dev_class_get(pci_dev->device.devargs) !=
                        SFC_EFX_DEV_CLASS_NET) {
                SFC_GENERIC_LOG(DEBUG,
                        "Incompatible device class: skip probing, should be probed by other sfc driver.");
                return 1;
        }

        rc = sfc_dp_mport_register();
        if (rc != 0)
                return rc;

        sfc_register_dp();

        logtype_main = sfc_register_logtype(&pci_dev->addr,
                                            SFC_LOGTYPE_MAIN_STR,
                                            RTE_LOG_NOTICE);

        if (rte_eal_process_type() != RTE_PROC_PRIMARY)
                return -sfc_eth_dev_secondary_init(dev, logtype_main);

        /* Required for logging */
        ret = snprintf(sas->log_prefix, sizeof(sas->log_prefix),
                        "PMD: sfc_efx " PCI_PRI_FMT " #%" PRIu16 ": ",
                        pci_dev->addr.domain, pci_dev->addr.bus,
                        pci_dev->addr.devid, pci_dev->addr.function,
                        dev->data->port_id);
        if (ret < 0 || ret >= (int)sizeof(sas->log_prefix)) {
                SFC_GENERIC_LOG(ERR,
                        "reserved log prefix is too short for " PCI_PRI_FMT,
                        pci_dev->addr.domain, pci_dev->addr.bus,
                        pci_dev->addr.devid, pci_dev->addr.function);
                return -EINVAL;
        }
        sas->pci_addr = pci_dev->addr;
        sas->port_id = dev->data->port_id;

        /*
         * Allocate process private data from heap, since it should not
         * be located in shared memory allocated using rte_malloc() API.
         */
        sa = calloc(1, sizeof(*sa));
        if (sa == NULL) {
                rc = ENOMEM;
                goto fail_alloc_sa;
        }

        dev->process_private = sa;

        /* Required for logging */
        sa->priv.shared = sas;
        sa->priv.logtype_main = logtype_main;

        sa->eth_dev = dev;

        /* Copy PCI device info to the dev->data */
        rte_eth_copy_pci_info(dev, pci_dev);
        dev->data->dev_flags |= RTE_ETH_DEV_FLOW_OPS_THREAD_SAFE;

        rc = sfc_kvargs_parse(sa);
        if (rc != 0)
                goto fail_kvargs_parse;

        sfc_log_init(sa, "entry");

        dev->data->mac_addrs = rte_zmalloc("sfc", RTE_ETHER_ADDR_LEN, 0);
        if (dev->data->mac_addrs == NULL) {
                rc = ENOMEM;
                goto fail_mac_addrs;
        }

        sfc_adapter_lock_init(sa);
        sfc_adapter_lock(sa);

        sfc_log_init(sa, "probing");
        rc = sfc_probe(sa);
        if (rc != 0)
                goto fail_probe;

        /*
         * Selecting a default switch mode requires the NIC to be probed and
         * to have its capabilities filled in.
         */
        rc = sfc_parse_switch_mode(sa, init_data->nb_representors > 0);
        if (rc != 0)
                goto fail_switch_mode;

        sfc_log_init(sa, "set device ops");
        rc = sfc_eth_dev_set_ops(dev);
        if (rc != 0)
                goto fail_set_ops;

        sfc_log_init(sa, "attaching");
        rc = sfc_attach(sa);
        if (rc != 0)
                goto fail_attach;

        if (sa->switchdev && sa->mae.status != SFC_MAE_STATUS_ADMIN) {
                sfc_err(sa,
                        "failed to enable switchdev mode without admin MAE privilege");
                rc = ENOTSUP;
                goto fail_switchdev_no_mae;
        }

        encp = efx_nic_cfg_get(sa->nic);

        /*
         * The arguments are really reverse order in comparison to
         * Linux kernel. Copy from NIC config to Ethernet device data.
         */
        from = (const struct rte_ether_addr *)(encp->enc_mac_addr);
        rte_ether_addr_copy(from, &dev->data->mac_addrs[0]);

        /*
         * Setup the NIC DMA mapping handler. All internal mempools
         * MUST be created on attach before this point, and the
         * adapter MUST NOT create mempools with the adapter lock
         * held after this point.
         */
        rc = sfc_nic_dma_attach(sa);
        if (rc != 0)
                goto fail_nic_dma_attach;

        sfc_adapter_unlock(sa);

        sfc_log_init(sa, "done");
        return 0;

fail_nic_dma_attach:
fail_switchdev_no_mae:
        sfc_detach(sa);

fail_attach:
        sfc_eth_dev_clear_ops(dev);

fail_set_ops:
fail_switch_mode:
        sfc_unprobe(sa);

fail_probe:
        sfc_adapter_unlock(sa);
        sfc_adapter_lock_fini(sa);
        rte_free(dev->data->mac_addrs);
        dev->data->mac_addrs = NULL;

fail_mac_addrs:
        sfc_kvargs_cleanup(sa);

fail_kvargs_parse:
        sfc_log_init(sa, "failed %d", rc);
        dev->process_private = NULL;
        free(sa);

fail_alloc_sa:
        SFC_ASSERT(rc > 0);
        return -rc;
}

static int
sfc_eth_dev_uninit(struct rte_eth_dev *dev)
{
        sfc_dev_close(dev);

        return 0;
}

static const struct rte_pci_id pci_id_sfc_efx_map[] = {
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_FARMINGDALE) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_FARMINGDALE_VF) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_GREENPORT) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_GREENPORT_VF) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD_VF) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD2) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD2_VF) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_XILINX, EFX_PCI_DEVID_RIVERHEAD) },
        { RTE_PCI_DEVICE(EFX_PCI_VENID_XILINX, EFX_PCI_DEVID_RIVERHEAD_VF) },
        { .vendor_id = 0 /* sentinel */ }
};

static int
sfc_parse_rte_devargs(const char *args, struct rte_eth_devargs *devargs)
{
        struct rte_eth_devargs eth_da = { .nb_representor_ports = 0 };
        int rc;

        if (args != NULL) {
                rc = rte_eth_devargs_parse(args, &eth_da);
                if (rc != 0) {
                        SFC_GENERIC_LOG(ERR,
                                        "Failed to parse generic devargs '%s'",
                                        args);
                        return rc;
                }
        }

        *devargs = eth_da;

        return 0;
}

static int
sfc_eth_dev_find_or_create(struct rte_pci_device *pci_dev,
                           struct sfc_ethdev_init_data *init_data,
                           struct rte_eth_dev **devp,
                           bool *dev_created)
{
        struct rte_eth_dev *dev;
        bool created = false;
        int rc;

        dev = rte_eth_dev_allocated(pci_dev->device.name);
        if (dev == NULL) {
                rc = rte_eth_dev_create(&pci_dev->device, pci_dev->device.name,
                                        sizeof(struct sfc_adapter_shared),
                                        eth_dev_pci_specific_init, pci_dev,
                                        sfc_eth_dev_init, init_data);
                if (rc != 0) {
                        SFC_GENERIC_LOG(ERR, "Failed to create sfc ethdev '%s'",
                                        pci_dev->device.name);
                        return rc;
                }

                created = true;

                dev = rte_eth_dev_allocated(pci_dev->device.name);
                if (dev == NULL) {
                        SFC_GENERIC_LOG(ERR,
                                "Failed to find allocated sfc ethdev '%s'",
                                pci_dev->device.name);
                        return -ENODEV;
                }
        }

        *devp = dev;
        *dev_created = created;

        return 0;
}

static int
sfc_eth_dev_create_repr(struct sfc_adapter *sa,
                        efx_pcie_interface_t controller,
                        uint16_t port,
                        uint16_t repr_port,
                        enum rte_eth_representor_type type)
{
        struct sfc_repr_entity_info entity;
        efx_mport_sel_t mport_sel;
        int rc;

        switch (type) {
        case RTE_ETH_REPRESENTOR_NONE:
                return 0;
        case RTE_ETH_REPRESENTOR_VF:
        case RTE_ETH_REPRESENTOR_PF:
                break;
        case RTE_ETH_REPRESENTOR_SF:
                sfc_err(sa, "SF representors are not supported");
                return ENOTSUP;
        default:
                sfc_err(sa, "unknown representor type: %d", type);
                return ENOTSUP;
        }

        rc = efx_mae_mport_by_pcie_mh_function(controller,
                                               port,
                                               repr_port,
                                               &mport_sel);
        if (rc != 0) {
                sfc_err(sa,
                        "failed to get m-port selector for controller %u port %u repr_port %u: %s",
                        controller, port, repr_port, rte_strerror(-rc));

                return rc;
        }

        memset(&entity, 0, sizeof(entity));
        entity.type = type;
        entity.intf = controller;
        entity.pf = port;
        entity.vf = repr_port;

        rc = sfc_repr_create(sa->eth_dev, &entity, sa->mae.switch_domain_id,
                             &mport_sel);
        if (rc != 0) {
                sfc_err(sa,
                        "failed to create representor for controller %u port %u repr_port %u: %s",
                        controller, port, repr_port, rte_strerror(-rc));
                return rc;
        }

        return 0;
}

static int
sfc_eth_dev_create_repr_port(struct sfc_adapter *sa,
                             const struct rte_eth_devargs *eth_da,
                             efx_pcie_interface_t controller,
                             uint16_t port)
{
        int first_error = 0;
        uint16_t i;
        int rc;

        if (eth_da->type == RTE_ETH_REPRESENTOR_PF) {
                return sfc_eth_dev_create_repr(sa, controller, port,
                                               EFX_PCI_VF_INVALID,
                                               eth_da->type);
        }

        for (i = 0; i < eth_da->nb_representor_ports; i++) {
                rc = sfc_eth_dev_create_repr(sa, controller, port,
                                             eth_da->representor_ports[i],
                                             eth_da->type);
                if (rc != 0 && first_error == 0)
                        first_error = rc;
        }

        return first_error;
}

static int
sfc_eth_dev_create_repr_controller(struct sfc_adapter *sa,
                                   const struct rte_eth_devargs *eth_da,
                                   efx_pcie_interface_t controller)
{
        const efx_nic_cfg_t *encp;
        int first_error = 0;
        uint16_t default_port;
        uint16_t i;
        int rc;

        if (eth_da->nb_ports == 0) {
                encp = efx_nic_cfg_get(sa->nic);
                default_port = encp->enc_intf == controller ? encp->enc_pf : 0;
                return sfc_eth_dev_create_repr_port(sa, eth_da, controller,
                                                    default_port);
        }

        for (i = 0; i < eth_da->nb_ports; i++) {
                rc = sfc_eth_dev_create_repr_port(sa, eth_da, controller,
                                                  eth_da->ports[i]);
                if (rc != 0 && first_error == 0)
                        first_error = rc;
        }

        return first_error;
}

static int
sfc_eth_dev_create_representors(struct rte_eth_dev *dev,
                                const struct rte_eth_devargs *eth_da)
{
        efx_pcie_interface_t intf;
        const efx_nic_cfg_t *encp;
        struct sfc_adapter *sa;
        uint16_t switch_domain_id;
        uint16_t i;
        int rc;

        sa = sfc_adapter_by_eth_dev(dev);
        switch_domain_id = sa->mae.switch_domain_id;

        switch (eth_da->type) {
        case RTE_ETH_REPRESENTOR_NONE:
                return 0;
        case RTE_ETH_REPRESENTOR_PF:
        case RTE_ETH_REPRESENTOR_VF:
                break;
        case RTE_ETH_REPRESENTOR_SF:
                sfc_err(sa, "SF representors are not supported");
                return -ENOTSUP;
        default:
                sfc_err(sa, "unknown representor type: %d",
                        eth_da->type);
                return -ENOTSUP;
        }

        if (!sa->switchdev) {
                sfc_err(sa, "cannot create representors in non-switchdev mode");
                return -EINVAL;
        }

        if (!sfc_repr_available(sfc_sa2shared(sa))) {
                sfc_err(sa, "cannot create representors: unsupported");

                return -ENOTSUP;
        }

        /*
         * This is needed to construct the DPDK controller -> EFX interface
         * mapping.
         */
        sfc_adapter_lock(sa);
        rc = sfc_process_mport_journal(sa);
        sfc_adapter_unlock(sa);
        if (rc != 0) {
                SFC_ASSERT(rc > 0);
                return -rc;
        }

        if (eth_da->nb_mh_controllers > 0) {
                for (i = 0; i < eth_da->nb_mh_controllers; i++) {
                        rc = sfc_mae_switch_domain_get_intf(switch_domain_id,
                                                eth_da->mh_controllers[i],
                                                &intf);
                        if (rc != 0) {
                                sfc_err(sa, "failed to get representor");
                                continue;
                        }
                        sfc_eth_dev_create_repr_controller(sa, eth_da, intf);
                }
        } else {
                encp = efx_nic_cfg_get(sa->nic);
                sfc_eth_dev_create_repr_controller(sa, eth_da, encp->enc_intf);
        }

        return 0;
}

static int sfc_eth_dev_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
        struct rte_pci_device *pci_dev)
{
        struct sfc_ethdev_init_data init_data;
        struct rte_eth_devargs eth_da;
        struct rte_eth_dev *dev;
        bool dev_created;
        int rc;

        if (pci_dev->device.devargs != NULL) {
                rc = sfc_parse_rte_devargs(pci_dev->device.devargs->args,
                                           &eth_da);
                if (rc != 0)
                        return rc;
        } else {
                memset(&eth_da, 0, sizeof(eth_da));
        }

        /* If no VF representors specified, check for PF ones */
        if (eth_da.nb_representor_ports > 0)
                init_data.nb_representors = eth_da.nb_representor_ports;
        else
                init_data.nb_representors = eth_da.nb_ports;

        if (init_data.nb_representors > 0 &&
            rte_eal_process_type() != RTE_PROC_PRIMARY) {
                SFC_GENERIC_LOG(ERR,
                        "Create representors from secondary process not supported, dev '%s'",
                        pci_dev->device.name);
                return -ENOTSUP;
        }

        /*
         * Driver supports RTE_PCI_DRV_PROBE_AGAIN. Hence create device only
         * if it does not already exist. Re-probing an existing device is
         * expected to allow additional representors to be configured.
         */
        rc = sfc_eth_dev_find_or_create(pci_dev, &init_data, &dev,
                                        &dev_created);
        if (rc != 0)
                return rc;

        rc = sfc_eth_dev_create_representors(dev, &eth_da);
        if (rc != 0) {
                if (dev_created)
                        (void)rte_eth_dev_destroy(dev, sfc_eth_dev_uninit);

                return rc;
        }

        return 0;
}

static int sfc_eth_dev_pci_remove(struct rte_pci_device *pci_dev)
{
        return rte_eth_dev_pci_generic_remove(pci_dev, sfc_eth_dev_uninit);
}

static struct rte_pci_driver sfc_efx_pmd = {
        .id_table = pci_id_sfc_efx_map,
        .drv_flags =
                RTE_PCI_DRV_INTR_LSC |
                RTE_PCI_DRV_NEED_MAPPING |
                RTE_PCI_DRV_PROBE_AGAIN,
        .probe = sfc_eth_dev_pci_probe,
        .remove = sfc_eth_dev_pci_remove,
};

RTE_PMD_REGISTER_PCI(net_sfc_efx, sfc_efx_pmd);
RTE_PMD_REGISTER_PCI_TABLE(net_sfc_efx, pci_id_sfc_efx_map);
RTE_PMD_REGISTER_KMOD_DEP(net_sfc_efx, "* igb_uio | uio_pci_generic | vfio-pci");
RTE_PMD_REGISTER_PARAM_STRING(net_sfc_efx,
        SFC_KVARG_SWITCH_MODE "=" SFC_KVARG_VALUES_SWITCH_MODE " "
        SFC_KVARG_RX_DATAPATH "=" SFC_KVARG_VALUES_RX_DATAPATH " "
        SFC_KVARG_TX_DATAPATH "=" SFC_KVARG_VALUES_TX_DATAPATH " "
        SFC_KVARG_PERF_PROFILE "=" SFC_KVARG_VALUES_PERF_PROFILE " "
        SFC_KVARG_FW_VARIANT "=" SFC_KVARG_VALUES_FW_VARIANT " "
        SFC_KVARG_RXD_WAIT_TIMEOUT_NS "=<long> "
        SFC_KVARG_STATS_UPDATE_PERIOD_MS "=<long>");

RTE_INIT(sfc_driver_register_logtype)
{
        int ret;

        ret = rte_log_register_type_and_pick_level(SFC_LOGTYPE_PREFIX "driver",
                                                   RTE_LOG_NOTICE);
        sfc_logtype_driver = (ret < 0) ? RTE_LOGTYPE_PMD : ret;
}