// SPDX-License-Identifier: GPL-2.0
/*
 * DPAA2 Ethernet Switch driver
 *
 * Copyright 2014-2016 Freescale Semiconductor Inc.
 * Copyright 2017-2021 NXP
 *
 */

#include <linux/module.h>

#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/workqueue.h>
#include <linux/iommu.h>
#include <net/pkt_cls.h>

#include <linux/fsl/mc.h>

#include "dpaa2-switch.h"

/* Minimal supported DPSW version */
#define DPSW_MIN_VER_MAJOR              8
#define DPSW_MIN_VER_MINOR              9

#define DEFAULT_VLAN_ID                 1

static u16 dpaa2_switch_port_get_fdb_id(struct ethsw_port_priv *port_priv)
{
        return port_priv->fdb->fdb_id;
}

static struct dpaa2_switch_fdb *dpaa2_switch_fdb_get_unused(struct ethsw_core *ethsw)
{
        int i;

        for (i = 0; i < ethsw->sw_attr.num_ifs; i++)
                if (!ethsw->fdbs[i].in_use)
                        return &ethsw->fdbs[i];
        return NULL;
}

static struct dpaa2_switch_filter_block *
dpaa2_switch_filter_block_get_unused(struct ethsw_core *ethsw)
{
        int i;

        for (i = 0; i < ethsw->sw_attr.num_ifs; i++)
                if (!ethsw->filter_blocks[i].in_use)
                        return &ethsw->filter_blocks[i];
        return NULL;
}

static bool dpaa2_switch_fdb_in_use_by_others(struct ethsw_core *ethsw,
                                              struct dpaa2_switch_fdb *fdb,
                                              struct ethsw_port_priv *except)
{
        int i;

        for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
                if (!ethsw->ports[i] || ethsw->ports[i] == except)
                        continue;
                if (ethsw->ports[i]->fdb == fdb)
                        return true;
        }

        return false;
}

static struct dpaa2_switch_fdb *
dpaa2_switch_fdb_for_join(struct ethsw_port_priv *port_priv,
                          struct net_device *upper_dev)
{
        struct ethsw_port_priv *other_port_priv;
        struct net_device *other_dev;
        struct list_head *iter;

        /* The below call to netdev_for_each_lower_dev() demands the RTNL lock
         * being held. Assert on it so that it's easier to catch new code
         * paths that reach this point without the RTNL lock.
         */
        ASSERT_RTNL();

        /* If part of a bridge, use the FDB of the first dpaa2 switch interface
         * to be present in that bridge
         */
        netdev_for_each_lower_dev(upper_dev, other_dev, iter) {
                if (!dpaa2_switch_port_dev_check(other_dev))
                        continue;

                if (other_dev == port_priv->netdev)
                        continue;

                other_port_priv = netdev_priv(other_dev);
                return other_port_priv->fdb;
        }

        return port_priv->fdb;
}

static struct dpaa2_switch_fdb *
dpaa2_switch_fdb_for_leave(struct ethsw_port_priv *port_priv)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;

        /* If this is the last user of the FDB, just keep using it. */
        if (!dpaa2_switch_fdb_in_use_by_others(ethsw, port_priv->fdb,
                                               port_priv)) {
                return port_priv->fdb;
        }

        /* Since we are not the last port which leaves a bridge,
         * acquire a new FDB and use it.
         */
        return dpaa2_switch_fdb_get_unused(ethsw);
}

static void dpaa2_switch_port_set_fdb(struct ethsw_port_priv *port_priv,
                                      struct net_device *upper_dev,
                                      bool linking)
{
        struct dpaa2_switch_fdb *old_fdb = port_priv->fdb;
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpaa2_switch_fdb *new_fdb;

        new_fdb = linking ? dpaa2_switch_fdb_for_join(port_priv, upper_dev) :
                            dpaa2_switch_fdb_for_leave(port_priv);
        /* The number of FDBs is sized to accommodate all switch ports as
         * standalone, each with its private FDB, which means that FDB must be
         * valid here even on the leave path. WARN if not.
         */
        if (WARN_ON(!new_fdb))
                return;

        if (old_fdb != new_fdb) {
                /* The previous FDB is about to become unused, release
                 * it if we are the last user.
                 */
                if (!dpaa2_switch_fdb_in_use_by_others(ethsw, port_priv->fdb,
                                                       port_priv)) {
                        old_fdb->in_use = false;
                        old_fdb->bridge_dev = NULL;
                }

                new_fdb->in_use = true;
                port_priv->fdb = new_fdb;
        }

        /* Keep track of the new upper bridge device */
        port_priv->fdb->bridge_dev = linking ? upper_dev : NULL;
}

static void dpaa2_switch_fdb_get_flood_cfg(struct ethsw_core *ethsw, u16 fdb_id,
                                           enum dpsw_flood_type type,
                                           struct dpsw_egress_flood_cfg *cfg)
{
        int i = 0, j;

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

        /* Add all the DPAA2 switch ports found in the same bridging domain to
         * the egress flooding domain
         */
        for (j = 0; j < ethsw->sw_attr.num_ifs; j++) {
                if (!ethsw->ports[j])
                        continue;
                if (ethsw->ports[j]->fdb->fdb_id != fdb_id)
                        continue;

                if (type == DPSW_BROADCAST && ethsw->ports[j]->bcast_flood)
                        cfg->if_id[i++] = ethsw->ports[j]->idx;
                else if (type == DPSW_FLOODING && ethsw->ports[j]->ucast_flood)
                        cfg->if_id[i++] = ethsw->ports[j]->idx;
        }

        /* Add the CTRL interface to the egress flooding domain */
        cfg->if_id[i++] = ethsw->sw_attr.num_ifs;

        cfg->fdb_id = fdb_id;
        cfg->flood_type = type;
        cfg->num_ifs = i;
}

static int dpaa2_switch_fdb_set_egress_flood(struct ethsw_core *ethsw, u16 fdb_id)
{
        struct dpsw_egress_flood_cfg flood_cfg;
        int err;

        /* Setup broadcast flooding domain */
        dpaa2_switch_fdb_get_flood_cfg(ethsw, fdb_id, DPSW_BROADCAST, &flood_cfg);
        err = dpsw_set_egress_flood(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                    &flood_cfg);
        if (err) {
                dev_err(ethsw->dev, "dpsw_set_egress_flood() = %d\n", err);
                return err;
        }

        /* Setup unknown flooding domain */
        dpaa2_switch_fdb_get_flood_cfg(ethsw, fdb_id, DPSW_FLOODING, &flood_cfg);
        err = dpsw_set_egress_flood(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                    &flood_cfg);
        if (err) {
                dev_err(ethsw->dev, "dpsw_set_egress_flood() = %d\n", err);
                return err;
        }

        return 0;
}

static void *dpaa2_iova_to_virt(struct iommu_domain *domain,
                                dma_addr_t iova_addr)
{
        phys_addr_t phys_addr;

        phys_addr = domain ? iommu_iova_to_phys(domain, iova_addr) : iova_addr;

        return phys_to_virt(phys_addr);
}

static int dpaa2_switch_add_vlan(struct ethsw_port_priv *port_priv, u16 vid)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpsw_vlan_cfg vcfg = {0};
        int err;

        vcfg.fdb_id = dpaa2_switch_port_get_fdb_id(port_priv);
        err = dpsw_vlan_add(ethsw->mc_io, 0,
                            ethsw->dpsw_handle, vid, &vcfg);
        if (err) {
                dev_err(ethsw->dev, "dpsw_vlan_add err %d\n", err);
                return err;
        }
        ethsw->vlans[vid] = ETHSW_VLAN_MEMBER;

        return 0;
}

static bool dpaa2_switch_port_is_up(struct ethsw_port_priv *port_priv)
{
        struct net_device *netdev = port_priv->netdev;
        struct dpsw_link_state state;
        int err;

        err = dpsw_if_get_link_state(port_priv->ethsw_data->mc_io, 0,
                                     port_priv->ethsw_data->dpsw_handle,
                                     port_priv->idx, &state);
        if (err) {
                netdev_err(netdev, "dpsw_if_get_link_state() err %d\n", err);
                return true;
        }

        WARN_ONCE(state.up > 1, "Garbage read into link_state");

        return state.up ? true : false;
}

static int dpaa2_switch_port_set_pvid(struct ethsw_port_priv *port_priv, u16 pvid)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct net_device *netdev = port_priv->netdev;
        struct dpsw_tci_cfg tci_cfg = { 0 };
        bool up;
        int err, ret;

        err = dpsw_if_get_tci(ethsw->mc_io, 0, ethsw->dpsw_handle,
                              port_priv->idx, &tci_cfg);
        if (err) {
                netdev_err(netdev, "dpsw_if_get_tci err %d\n", err);
                return err;
        }

        tci_cfg.vlan_id = pvid;

        /* Interface needs to be down to change PVID */
        up = dpaa2_switch_port_is_up(port_priv);
        if (up) {
                err = dpsw_if_disable(ethsw->mc_io, 0,
                                      ethsw->dpsw_handle,
                                      port_priv->idx);
                if (err) {
                        netdev_err(netdev, "dpsw_if_disable err %d\n", err);
                        return err;
                }
        }

        err = dpsw_if_set_tci(ethsw->mc_io, 0, ethsw->dpsw_handle,
                              port_priv->idx, &tci_cfg);
        if (err) {
                netdev_err(netdev, "dpsw_if_set_tci err %d\n", err);
                goto set_tci_error;
        }

        /* Delete previous PVID info and mark the new one */
        port_priv->vlans[port_priv->pvid] &= ~ETHSW_VLAN_PVID;
        port_priv->vlans[pvid] |= ETHSW_VLAN_PVID;
        port_priv->pvid = pvid;

set_tci_error:
        if (up) {
                ret = dpsw_if_enable(ethsw->mc_io, 0,
                                     ethsw->dpsw_handle,
                                     port_priv->idx);
                if (ret) {
                        netdev_err(netdev, "dpsw_if_enable err %d\n", ret);
                        return ret;
                }
        }

        return err;
}

static int dpaa2_switch_port_add_vlan(struct ethsw_port_priv *port_priv,
                                      u16 vid, u16 flags, bool changed)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct net_device *netdev = port_priv->netdev;
        struct dpsw_vlan_if_cfg vcfg = {0};
        int err;

        if (!port_priv->vlans[vid]) {
                /* If hit, this VLAN rule will lead the packet into the FDB
                 * table specified in the vlan configuration below
                 */
                vcfg.num_ifs = 1;
                vcfg.if_id[0] = port_priv->idx;
                vcfg.fdb_id = dpaa2_switch_port_get_fdb_id(port_priv);
                vcfg.options |= DPSW_VLAN_ADD_IF_OPT_FDB_ID;
                err = dpsw_vlan_add_if(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                       vid, &vcfg);
                if (err) {
                        netdev_err(netdev, "dpsw_vlan_add_if err %d\n", err);
                        return err;
                }

                port_priv->vlans[vid] = ETHSW_VLAN_MEMBER;
        }

        memset(&vcfg, 0, sizeof(vcfg));
        vcfg.num_ifs = 1;
        vcfg.if_id[0] = port_priv->idx;

        if (flags & BRIDGE_VLAN_INFO_UNTAGGED) {
                if (!(port_priv->vlans[vid] & ETHSW_VLAN_UNTAGGED)) {
                        err = dpsw_vlan_add_if_untagged(ethsw->mc_io, 0,
                                                        ethsw->dpsw_handle,
                                                        vid, &vcfg);
                        if (err) {
                                netdev_err(netdev,
                                           "dpsw_vlan_add_if_untagged err %d\n",
                                           err);
                                return err;
                        }
                        port_priv->vlans[vid] |= ETHSW_VLAN_UNTAGGED;
                }
        } else if (changed && (port_priv->vlans[vid] & ETHSW_VLAN_UNTAGGED)) {
                err = dpsw_vlan_remove_if_untagged(ethsw->mc_io, 0,
                                                   ethsw->dpsw_handle,
                                                   vid, &vcfg);
                if (err) {
                        netdev_err(netdev,
                                   "dpsw_vlan_remove_if_untagged err %d\n",
                                   err);
                }
                port_priv->vlans[vid] &= ~ETHSW_VLAN_UNTAGGED;
        }

        if (flags & BRIDGE_VLAN_INFO_PVID) {
                err = dpaa2_switch_port_set_pvid(port_priv, vid);
                if (err)
                        return err;
        } else if (changed && port_priv->vlans[vid] & ETHSW_VLAN_PVID) {
                err = dpaa2_switch_port_set_pvid(port_priv, 4095);
                if (err)
                        return err;
        }

        return 0;
}

static enum dpsw_stp_state br_stp_state_to_dpsw(u8 state)
{
        switch (state) {
        case BR_STATE_DISABLED:
                return DPSW_STP_STATE_DISABLED;
        case BR_STATE_LISTENING:
                return DPSW_STP_STATE_LISTENING;
        case BR_STATE_LEARNING:
                return DPSW_STP_STATE_LEARNING;
        case BR_STATE_FORWARDING:
                return DPSW_STP_STATE_FORWARDING;
        case BR_STATE_BLOCKING:
                return DPSW_STP_STATE_BLOCKING;
        default:
                return DPSW_STP_STATE_DISABLED;
        }
}

static int dpaa2_switch_port_set_stp_state(struct ethsw_port_priv *port_priv, u8 state)
{
        struct dpsw_stp_cfg stp_cfg = {0};
        int err;
        u16 vid;

        if (!netif_running(port_priv->netdev) || state == port_priv->stp_state)
                return 0;       /* Nothing to do */

        stp_cfg.state = br_stp_state_to_dpsw(state);
        for (vid = 0; vid <= VLAN_VID_MASK; vid++) {
                if (port_priv->vlans[vid] & ETHSW_VLAN_MEMBER) {
                        stp_cfg.vlan_id = vid;
                        err = dpsw_if_set_stp(port_priv->ethsw_data->mc_io, 0,
                                              port_priv->ethsw_data->dpsw_handle,
                                              port_priv->idx, &stp_cfg);
                        if (err) {
                                netdev_err(port_priv->netdev,
                                           "dpsw_if_set_stp err %d\n", err);
                                return err;
                        }
                }
        }

        port_priv->stp_state = state;

        return 0;
}

static int dpaa2_switch_dellink(struct ethsw_core *ethsw, u16 vid)
{
        struct ethsw_port_priv *ppriv_local = NULL;
        int i, err;

        if (!ethsw->vlans[vid])
                return -ENOENT;

        err = dpsw_vlan_remove(ethsw->mc_io, 0, ethsw->dpsw_handle, vid);
        if (err) {
                dev_err(ethsw->dev, "dpsw_vlan_remove err %d\n", err);
                return err;
        }
        ethsw->vlans[vid] = 0;

        for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
                ppriv_local = ethsw->ports[i];
                if (ppriv_local)
                        ppriv_local->vlans[vid] = 0;
        }

        return 0;
}

static int dpaa2_switch_port_fdb_add_uc(struct ethsw_port_priv *port_priv,
                                        const unsigned char *addr)
{
        struct dpsw_fdb_unicast_cfg entry = {0};
        u16 fdb_id;
        int err;

        entry.if_egress = port_priv->idx;
        entry.type = DPSW_FDB_ENTRY_STATIC;
        ether_addr_copy(entry.mac_addr, addr);

        fdb_id = dpaa2_switch_port_get_fdb_id(port_priv);
        err = dpsw_fdb_add_unicast(port_priv->ethsw_data->mc_io, 0,
                                   port_priv->ethsw_data->dpsw_handle,
                                   fdb_id, &entry);
        if (err)
                netdev_err(port_priv->netdev,
                           "dpsw_fdb_add_unicast err %d\n", err);
        return err;
}

static int dpaa2_switch_port_fdb_del_uc(struct ethsw_port_priv *port_priv,
                                        const unsigned char *addr)
{
        struct dpsw_fdb_unicast_cfg entry = {0};
        u16 fdb_id;
        int err;

        entry.if_egress = port_priv->idx;
        entry.type = DPSW_FDB_ENTRY_STATIC;
        ether_addr_copy(entry.mac_addr, addr);

        fdb_id = dpaa2_switch_port_get_fdb_id(port_priv);
        err = dpsw_fdb_remove_unicast(port_priv->ethsw_data->mc_io, 0,
                                      port_priv->ethsw_data->dpsw_handle,
                                      fdb_id, &entry);
        /* Silently discard error for calling multiple times the del command */
        if (err && err != -ENXIO)
                netdev_err(port_priv->netdev,
                           "dpsw_fdb_remove_unicast err %d\n", err);
        return err;
}

static int dpaa2_switch_port_fdb_add_mc(struct ethsw_port_priv *port_priv,
                                        const unsigned char *addr)
{
        struct dpsw_fdb_multicast_cfg entry = {0};
        u16 fdb_id;
        int err;

        ether_addr_copy(entry.mac_addr, addr);
        entry.type = DPSW_FDB_ENTRY_STATIC;
        entry.num_ifs = 1;
        entry.if_id[0] = port_priv->idx;

        fdb_id = dpaa2_switch_port_get_fdb_id(port_priv);
        err = dpsw_fdb_add_multicast(port_priv->ethsw_data->mc_io, 0,
                                     port_priv->ethsw_data->dpsw_handle,
                                     fdb_id, &entry);
        /* Silently discard error for calling multiple times the add command */
        if (err && err != -ENXIO)
                netdev_err(port_priv->netdev, "dpsw_fdb_add_multicast err %d\n",
                           err);
        return err;
}

static int dpaa2_switch_port_fdb_del_mc(struct ethsw_port_priv *port_priv,
                                        const unsigned char *addr)
{
        struct dpsw_fdb_multicast_cfg entry = {0};
        u16 fdb_id;
        int err;

        ether_addr_copy(entry.mac_addr, addr);
        entry.type = DPSW_FDB_ENTRY_STATIC;
        entry.num_ifs = 1;
        entry.if_id[0] = port_priv->idx;

        fdb_id = dpaa2_switch_port_get_fdb_id(port_priv);
        err = dpsw_fdb_remove_multicast(port_priv->ethsw_data->mc_io, 0,
                                        port_priv->ethsw_data->dpsw_handle,
                                        fdb_id, &entry);
        /* Silently discard error for calling multiple times the del command */
        if (err && err != -ENAVAIL)
                netdev_err(port_priv->netdev,
                           "dpsw_fdb_remove_multicast err %d\n", err);
        return err;
}

static void dpaa2_switch_port_get_stats(struct net_device *netdev,
                                        struct rtnl_link_stats64 *stats)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        u64 tmp;
        int err;

        err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
                                  port_priv->ethsw_data->dpsw_handle,
                                  port_priv->idx,
                                  DPSW_CNT_ING_FRAME, &stats->rx_packets);
        if (err)
                goto error;

        err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
                                  port_priv->ethsw_data->dpsw_handle,
                                  port_priv->idx,
                                  DPSW_CNT_EGR_FRAME, &stats->tx_packets);
        if (err)
                goto error;

        err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
                                  port_priv->ethsw_data->dpsw_handle,
                                  port_priv->idx,
                                  DPSW_CNT_ING_BYTE, &stats->rx_bytes);
        if (err)
                goto error;

        err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
                                  port_priv->ethsw_data->dpsw_handle,
                                  port_priv->idx,
                                  DPSW_CNT_EGR_BYTE, &stats->tx_bytes);
        if (err)
                goto error;

        err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
                                  port_priv->ethsw_data->dpsw_handle,
                                  port_priv->idx,
                                  DPSW_CNT_ING_FRAME_DISCARD,
                                  &stats->rx_dropped);
        if (err)
                goto error;

        err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
                                  port_priv->ethsw_data->dpsw_handle,
                                  port_priv->idx,
                                  DPSW_CNT_ING_FLTR_FRAME,
                                  &tmp);
        if (err)
                goto error;
        stats->rx_dropped += tmp;

        err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
                                  port_priv->ethsw_data->dpsw_handle,
                                  port_priv->idx,
                                  DPSW_CNT_EGR_FRAME_DISCARD,
                                  &stats->tx_dropped);
        if (err)
                goto error;

        return;

error:
        netdev_err(netdev, "dpsw_if_get_counter err %d\n", err);
}

static bool dpaa2_switch_port_has_offload_stats(const struct net_device *netdev,
                                                int attr_id)
{
        return (attr_id == IFLA_OFFLOAD_XSTATS_CPU_HIT);
}

static int dpaa2_switch_port_get_offload_stats(int attr_id,
                                               const struct net_device *netdev,
                                               void *sp)
{
        switch (attr_id) {
        case IFLA_OFFLOAD_XSTATS_CPU_HIT:
                dpaa2_switch_port_get_stats((struct net_device *)netdev, sp);
                return 0;
        }

        return -EINVAL;
}

static int dpaa2_switch_port_change_mtu(struct net_device *netdev, int mtu)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        int err;

        err = dpsw_if_set_max_frame_length(port_priv->ethsw_data->mc_io,
                                           0,
                                           port_priv->ethsw_data->dpsw_handle,
                                           port_priv->idx,
                                           (u16)ETHSW_L2_MAX_FRM(mtu));
        if (err) {
                netdev_err(netdev,
                           "dpsw_if_set_max_frame_length() err %d\n", err);
                return err;
        }

        WRITE_ONCE(netdev->mtu, mtu);
        return 0;
}

static int dpaa2_switch_port_link_state_update(struct net_device *netdev)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct dpsw_link_state state;
        int err;

        /* When we manage the MAC/PHY using phylink there is no need
         * to manually update the netif_carrier.
         * We can avoid locking because we are called from the "link changed"
         * IRQ handler, which is the same as the "endpoint changed" IRQ handler
         * (the writer to port_priv->mac), so we cannot race with it.
         */
        if (dpaa2_mac_is_type_phy(port_priv->mac))
                return 0;

        /* Interrupts are received even though no one issued an 'ifconfig up'
         * on the switch interface. Ignore these link state update interrupts
         */
        if (!netif_running(netdev))
                return 0;

        err = dpsw_if_get_link_state(port_priv->ethsw_data->mc_io, 0,
                                     port_priv->ethsw_data->dpsw_handle,
                                     port_priv->idx, &state);
        if (err) {
                netdev_err(netdev, "dpsw_if_get_link_state() err %d\n", err);
                return err;
        }

        WARN_ONCE(state.up > 1, "Garbage read into link_state");

        if (state.up != port_priv->link_state) {
                if (state.up) {
                        netif_carrier_on(netdev);
                        netif_tx_start_all_queues(netdev);
                } else {
                        netif_carrier_off(netdev);
                        netif_tx_stop_all_queues(netdev);
                }
                port_priv->link_state = state.up;
        }

        return 0;
}

/* Manage all NAPI instances for the control interface.
 *
 * We only have one RX queue and one Tx Conf queue for all
 * switch ports. Therefore, we only need to enable the NAPI instance once, the
 * first time one of the switch ports runs .dev_open().
 */

static void dpaa2_switch_enable_ctrl_if_napi(struct ethsw_core *ethsw)
{
        int i;

        /* Access to the ethsw->napi_users relies on the RTNL lock */
        ASSERT_RTNL();

        /* a new interface is using the NAPI instance */
        ethsw->napi_users++;

        /* if there is already a user of the instance, return */
        if (ethsw->napi_users > 1)
                return;

        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++)
                napi_enable(&ethsw->fq[i].napi);
}

static void dpaa2_switch_disable_ctrl_if_napi(struct ethsw_core *ethsw)
{
        int i;

        /* Access to the ethsw->napi_users relies on the RTNL lock */
        ASSERT_RTNL();

        /* If we are not the last interface using the NAPI, return */
        ethsw->napi_users--;
        if (ethsw->napi_users)
                return;

        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++)
                napi_disable(&ethsw->fq[i].napi);
}

static int dpaa2_switch_port_open(struct net_device *netdev)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        int err;

        mutex_lock(&port_priv->mac_lock);

        if (!dpaa2_switch_port_is_type_phy(port_priv)) {
                /* Explicitly set carrier off, otherwise
                 * netif_carrier_ok() will return true and cause 'ip link show'
                 * to report the LOWER_UP flag, even though the link
                 * notification wasn't even received.
                 */
                netif_carrier_off(netdev);
        }

        err = dpsw_if_enable(port_priv->ethsw_data->mc_io, 0,
                             port_priv->ethsw_data->dpsw_handle,
                             port_priv->idx);
        if (err) {
                mutex_unlock(&port_priv->mac_lock);
                netdev_err(netdev, "dpsw_if_enable err %d\n", err);
                return err;
        }

        dpaa2_switch_enable_ctrl_if_napi(ethsw);

        if (dpaa2_switch_port_is_type_phy(port_priv))
                dpaa2_mac_start(port_priv->mac);

        mutex_unlock(&port_priv->mac_lock);

        return 0;
}

static int dpaa2_switch_port_stop(struct net_device *netdev)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        int err;

        mutex_lock(&port_priv->mac_lock);

        if (dpaa2_switch_port_is_type_phy(port_priv)) {
                dpaa2_mac_stop(port_priv->mac);
        } else {
                netif_tx_stop_all_queues(netdev);
                netif_carrier_off(netdev);
        }

        mutex_unlock(&port_priv->mac_lock);

        err = dpsw_if_disable(port_priv->ethsw_data->mc_io, 0,
                              port_priv->ethsw_data->dpsw_handle,
                              port_priv->idx);
        if (err) {
                netdev_err(netdev, "dpsw_if_disable err %d\n", err);
                return err;
        }

        dpaa2_switch_disable_ctrl_if_napi(ethsw);

        return 0;
}

static int dpaa2_switch_port_parent_id(struct net_device *dev,
                                       struct netdev_phys_item_id *ppid)
{
        struct ethsw_port_priv *port_priv = netdev_priv(dev);

        ppid->id_len = 1;
        ppid->id[0] = port_priv->ethsw_data->dev_id;

        return 0;
}

static int dpaa2_switch_port_get_phys_name(struct net_device *netdev, char *name,
                                           size_t len)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        int err;

        err = snprintf(name, len, "p%d", port_priv->idx);
        if (err >= len)
                return -EINVAL;

        return 0;
}

struct ethsw_dump_ctx {
        struct net_device *dev;
        struct sk_buff *skb;
        struct netlink_callback *cb;
        int idx;
};

static int dpaa2_switch_fdb_dump_nl(struct fdb_dump_entry *entry,
                                    struct ethsw_dump_ctx *dump)
{
        struct ndo_fdb_dump_context *ctx = (void *)dump->cb->ctx;
        int is_dynamic = entry->type & DPSW_FDB_ENTRY_DINAMIC;
        u32 portid = NETLINK_CB(dump->cb->skb).portid;
        u32 seq = dump->cb->nlh->nlmsg_seq;
        struct nlmsghdr *nlh;
        struct ndmsg *ndm;

        if (dump->idx < ctx->fdb_idx)
                goto skip;

        nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
                        sizeof(*ndm), NLM_F_MULTI);
        if (!nlh)
                return -EMSGSIZE;

        ndm = nlmsg_data(nlh);
        ndm->ndm_family  = AF_BRIDGE;
        ndm->ndm_pad1    = 0;
        ndm->ndm_pad2    = 0;
        ndm->ndm_flags   = NTF_SELF;
        ndm->ndm_type    = 0;
        ndm->ndm_ifindex = dump->dev->ifindex;
        ndm->ndm_state   = is_dynamic ? NUD_REACHABLE : NUD_NOARP;

        if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, entry->mac_addr))
                goto nla_put_failure;

        nlmsg_end(dump->skb, nlh);

skip:
        dump->idx++;
        return 0;

nla_put_failure:
        nlmsg_cancel(dump->skb, nlh);
        return -EMSGSIZE;
}

static int dpaa2_switch_port_fdb_valid_entry(struct fdb_dump_entry *entry,
                                             struct ethsw_port_priv *port_priv)
{
        int idx = port_priv->idx;
        int valid;

        if (entry->type & DPSW_FDB_ENTRY_TYPE_UNICAST)
                valid = entry->if_info == port_priv->idx;
        else
                valid = entry->if_mask[idx / 8] & BIT(idx % 8);

        return valid;
}

static int dpaa2_switch_fdb_iterate(struct ethsw_port_priv *port_priv,
                                    dpaa2_switch_fdb_cb_t cb, void *data)
{
        struct net_device *net_dev = port_priv->netdev;
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct device *dev = net_dev->dev.parent;
        struct fdb_dump_entry *fdb_entries;
        struct fdb_dump_entry fdb_entry;
        dma_addr_t fdb_dump_iova;
        u16 num_fdb_entries;
        u32 fdb_dump_size;
        int err = 0, i;
        u8 *dma_mem;
        u16 fdb_id;

        fdb_dump_size = ethsw->sw_attr.max_fdb_entries * sizeof(fdb_entry);
        dma_mem = kzalloc(fdb_dump_size, GFP_KERNEL);
        if (!dma_mem)
                return -ENOMEM;

        fdb_dump_iova = dma_map_single(dev, dma_mem, fdb_dump_size,
                                       DMA_FROM_DEVICE);
        if (dma_mapping_error(dev, fdb_dump_iova)) {
                netdev_err(net_dev, "dma_map_single() failed\n");
                err = -ENOMEM;
                goto err_map;
        }

        fdb_id = dpaa2_switch_port_get_fdb_id(port_priv);
        err = dpsw_fdb_dump(ethsw->mc_io, 0, ethsw->dpsw_handle, fdb_id,
                            fdb_dump_iova, fdb_dump_size, &num_fdb_entries);
        if (err) {
                netdev_err(net_dev, "dpsw_fdb_dump() = %d\n", err);
                goto err_dump;
        }

        dma_unmap_single(dev, fdb_dump_iova, fdb_dump_size, DMA_FROM_DEVICE);

        fdb_entries = (struct fdb_dump_entry *)dma_mem;
        for (i = 0; i < num_fdb_entries; i++) {
                fdb_entry = fdb_entries[i];

                err = cb(port_priv, &fdb_entry, data);
                if (err)
                        goto end;
        }

end:
        kfree(dma_mem);

        return 0;

err_dump:
        dma_unmap_single(dev, fdb_dump_iova, fdb_dump_size, DMA_TO_DEVICE);
err_map:
        kfree(dma_mem);
        return err;
}

static int dpaa2_switch_fdb_entry_dump(struct ethsw_port_priv *port_priv,
                                       struct fdb_dump_entry *fdb_entry,
                                       void *data)
{
        if (!dpaa2_switch_port_fdb_valid_entry(fdb_entry, port_priv))
                return 0;

        return dpaa2_switch_fdb_dump_nl(fdb_entry, data);
}

static int dpaa2_switch_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
                                      struct net_device *net_dev,
                                      struct net_device *filter_dev, int *idx)
{
        struct ethsw_port_priv *port_priv = netdev_priv(net_dev);
        struct ethsw_dump_ctx dump = {
                .dev = net_dev,
                .skb = skb,
                .cb = cb,
                .idx = *idx,
        };
        int err;

        err = dpaa2_switch_fdb_iterate(port_priv, dpaa2_switch_fdb_entry_dump, &dump);
        *idx = dump.idx;

        return err;
}

static int dpaa2_switch_fdb_entry_fast_age(struct ethsw_port_priv *port_priv,
                                           struct fdb_dump_entry *fdb_entry,
                                           void *data __always_unused)
{
        if (!dpaa2_switch_port_fdb_valid_entry(fdb_entry, port_priv))
                return 0;

        if (!(fdb_entry->type & DPSW_FDB_ENTRY_TYPE_DYNAMIC))
                return 0;

        if (fdb_entry->type & DPSW_FDB_ENTRY_TYPE_UNICAST)
                dpaa2_switch_port_fdb_del_uc(port_priv, fdb_entry->mac_addr);
        else
                dpaa2_switch_port_fdb_del_mc(port_priv, fdb_entry->mac_addr);

        return 0;
}

static void dpaa2_switch_port_fast_age(struct ethsw_port_priv *port_priv)
{
        dpaa2_switch_fdb_iterate(port_priv,
                                 dpaa2_switch_fdb_entry_fast_age, NULL);
}

static int dpaa2_switch_port_vlan_add(struct net_device *netdev, __be16 proto,
                                      u16 vid)
{
        struct switchdev_obj_port_vlan vlan = {
                .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
                .vid = vid,
                .obj.orig_dev = netdev,
                /* This API only allows programming tagged, non-PVID VIDs */
                .flags = 0,
                .changed = false,
        };

        return dpaa2_switch_port_vlans_add(netdev, &vlan);
}

static int dpaa2_switch_port_vlan_kill(struct net_device *netdev, __be16 proto,
                                       u16 vid)
{
        struct switchdev_obj_port_vlan vlan = {
                .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
                .vid = vid,
                .obj.orig_dev = netdev,
                /* This API only allows programming tagged, non-PVID VIDs */
                .flags = 0,
        };

        return dpaa2_switch_port_vlans_del(netdev, &vlan);
}

static int dpaa2_switch_port_set_mac_addr(struct ethsw_port_priv *port_priv)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct net_device *net_dev = port_priv->netdev;
        struct device *dev = net_dev->dev.parent;
        u8 mac_addr[ETH_ALEN];
        int err;

        if (!(ethsw->features & ETHSW_FEATURE_MAC_ADDR))
                return 0;

        /* Get firmware address, if any */
        err = dpsw_if_get_port_mac_addr(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                        port_priv->idx, mac_addr);
        if (err) {
                dev_err(dev, "dpsw_if_get_port_mac_addr() failed\n");
                return err;
        }

        /* First check if firmware has any address configured by bootloader */
        if (!is_zero_ether_addr(mac_addr)) {
                eth_hw_addr_set(net_dev, mac_addr);
        } else {
                /* No MAC address configured, fill in net_dev->dev_addr
                 * with a random one
                 */
                eth_hw_addr_random(net_dev);
                dev_dbg_once(dev, "device(s) have all-zero hwaddr, replaced with random\n");

                /* Override NET_ADDR_RANDOM set by eth_hw_addr_random(); for all
                 * practical purposes, this will be our "permanent" mac address,
                 * at least until the next reboot. This move will also permit
                 * register_netdevice() to properly fill up net_dev->perm_addr.
                 */
                net_dev->addr_assign_type = NET_ADDR_PERM;
        }

        return 0;
}

static void dpaa2_switch_free_fd(const struct ethsw_core *ethsw,
                                 const struct dpaa2_fd *fd)
{
        struct device *dev = ethsw->dev;
        unsigned char *buffer_start;
        struct sk_buff **skbh, *skb;
        dma_addr_t fd_addr;

        fd_addr = dpaa2_fd_get_addr(fd);
        skbh = dpaa2_iova_to_virt(ethsw->iommu_domain, fd_addr);

        skb = *skbh;
        buffer_start = (unsigned char *)skbh;

        dma_unmap_single(dev, fd_addr,
                         skb_tail_pointer(skb) - buffer_start,
                         DMA_TO_DEVICE);

        /* Move on with skb release */
        dev_kfree_skb(skb);
}

static int dpaa2_switch_build_single_fd(struct ethsw_core *ethsw,
                                        struct sk_buff *skb,
                                        struct dpaa2_fd *fd)
{
        struct device *dev = ethsw->dev;
        struct sk_buff **skbh;
        dma_addr_t addr;
        u8 *buff_start;
        void *hwa;

        buff_start = PTR_ALIGN(skb->data - DPAA2_SWITCH_TX_DATA_OFFSET -
                               DPAA2_SWITCH_TX_BUF_ALIGN,
                               DPAA2_SWITCH_TX_BUF_ALIGN);

        /* Clear FAS to have consistent values for TX confirmation. It is
         * located in the first 8 bytes of the buffer's hardware annotation
         * area
         */
        hwa = buff_start + DPAA2_SWITCH_SWA_SIZE;
        memset(hwa, 0, 8);

        /* Store a backpointer to the skb at the beginning of the buffer
         * (in the private data area) such that we can release it
         * on Tx confirm
         */
        skbh = (struct sk_buff **)buff_start;
        *skbh = skb;

        addr = dma_map_single(dev, buff_start,
                              skb_tail_pointer(skb) - buff_start,
                              DMA_TO_DEVICE);
        if (unlikely(dma_mapping_error(dev, addr)))
                return -ENOMEM;

        /* Setup the FD fields */
        memset(fd, 0, sizeof(*fd));

        dpaa2_fd_set_addr(fd, addr);
        dpaa2_fd_set_offset(fd, (u16)(skb->data - buff_start));
        dpaa2_fd_set_len(fd, skb->len);
        dpaa2_fd_set_format(fd, dpaa2_fd_single);

        return 0;
}

static netdev_tx_t dpaa2_switch_port_tx(struct sk_buff *skb,
                                        struct net_device *net_dev)
{
        struct ethsw_port_priv *port_priv = netdev_priv(net_dev);
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        int retries = DPAA2_SWITCH_SWP_BUSY_RETRIES;
        struct dpaa2_fd fd;
        int err;

        if (unlikely(skb_headroom(skb) < DPAA2_SWITCH_NEEDED_HEADROOM)) {
                struct sk_buff *ns;

                ns = skb_realloc_headroom(skb, DPAA2_SWITCH_NEEDED_HEADROOM);
                if (unlikely(!ns)) {
                        net_err_ratelimited("%s: Error reallocating skb headroom\n", net_dev->name);
                        goto err_free_skb;
                }
                dev_consume_skb_any(skb);
                skb = ns;
        }

        /* We'll be holding a back-reference to the skb until Tx confirmation */
        skb = skb_unshare(skb, GFP_ATOMIC);
        if (unlikely(!skb)) {
                /* skb_unshare() has already freed the skb */
                net_err_ratelimited("%s: Error copying the socket buffer\n", net_dev->name);
                goto err_exit;
        }

        /* At this stage, we do not support non-linear skbs so just try to
         * linearize the skb and if that's not working, just drop the packet.
         */
        err = skb_linearize(skb);
        if (err) {
                net_err_ratelimited("%s: skb_linearize error (%d)!\n", net_dev->name, err);
                goto err_free_skb;
        }

        err = dpaa2_switch_build_single_fd(ethsw, skb, &fd);
        if (unlikely(err)) {
                net_err_ratelimited("%s: ethsw_build_*_fd() %d\n", net_dev->name, err);
                goto err_free_skb;
        }

        do {
                err = dpaa2_io_service_enqueue_qd(NULL,
                                                  port_priv->tx_qdid,
                                                  8, 0, &fd);
                retries--;
        } while (err == -EBUSY && retries);

        if (unlikely(err < 0)) {
                dpaa2_switch_free_fd(ethsw, &fd);
                goto err_exit;
        }

        return NETDEV_TX_OK;

err_free_skb:
        dev_kfree_skb(skb);
err_exit:
        return NETDEV_TX_OK;
}

static int
dpaa2_switch_setup_tc_cls_flower(struct dpaa2_switch_filter_block *filter_block,
                                 struct flow_cls_offload *f)
{
        switch (f->command) {
        case FLOW_CLS_REPLACE:
                return dpaa2_switch_cls_flower_replace(filter_block, f);
        case FLOW_CLS_DESTROY:
                return dpaa2_switch_cls_flower_destroy(filter_block, f);
        default:
                return -EOPNOTSUPP;
        }
}

static int
dpaa2_switch_setup_tc_cls_matchall(struct dpaa2_switch_filter_block *block,
                                   struct tc_cls_matchall_offload *f)
{
        switch (f->command) {
        case TC_CLSMATCHALL_REPLACE:
                return dpaa2_switch_cls_matchall_replace(block, f);
        case TC_CLSMATCHALL_DESTROY:
                return dpaa2_switch_cls_matchall_destroy(block, f);
        default:
                return -EOPNOTSUPP;
        }
}

static int dpaa2_switch_port_setup_tc_block_cb_ig(enum tc_setup_type type,
                                                  void *type_data,
                                                  void *cb_priv)
{
        switch (type) {
        case TC_SETUP_CLSFLOWER:
                return dpaa2_switch_setup_tc_cls_flower(cb_priv, type_data);
        case TC_SETUP_CLSMATCHALL:
                return dpaa2_switch_setup_tc_cls_matchall(cb_priv, type_data);
        default:
                return -EOPNOTSUPP;
        }
}

static LIST_HEAD(dpaa2_switch_block_cb_list);

static int
dpaa2_switch_port_acl_tbl_bind(struct ethsw_port_priv *port_priv,
                               struct dpaa2_switch_filter_block *block)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct net_device *netdev = port_priv->netdev;
        struct dpsw_acl_if_cfg acl_if_cfg;
        int err;

        if (port_priv->filter_block)
                return -EINVAL;

        acl_if_cfg.if_id[0] = port_priv->idx;
        acl_if_cfg.num_ifs = 1;
        err = dpsw_acl_add_if(ethsw->mc_io, 0, ethsw->dpsw_handle,
                              block->acl_id, &acl_if_cfg);
        if (err) {
                netdev_err(netdev, "dpsw_acl_add_if err %d\n", err);
                return err;
        }

        block->ports |= BIT(port_priv->idx);
        port_priv->filter_block = block;

        return 0;
}

static int
dpaa2_switch_port_acl_tbl_unbind(struct ethsw_port_priv *port_priv,
                                 struct dpaa2_switch_filter_block *block)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct net_device *netdev = port_priv->netdev;
        struct dpsw_acl_if_cfg acl_if_cfg;
        int err;

        if (port_priv->filter_block != block)
                return -EINVAL;

        acl_if_cfg.if_id[0] = port_priv->idx;
        acl_if_cfg.num_ifs = 1;
        err = dpsw_acl_remove_if(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                 block->acl_id, &acl_if_cfg);
        if (err) {
                netdev_err(netdev, "dpsw_acl_add_if err %d\n", err);
                return err;
        }

        block->ports &= ~BIT(port_priv->idx);
        port_priv->filter_block = NULL;
        return 0;
}

static int dpaa2_switch_port_block_bind(struct ethsw_port_priv *port_priv,
                                        struct dpaa2_switch_filter_block *block)
{
        struct dpaa2_switch_filter_block *old_block = port_priv->filter_block;
        int err;

        /* Offload all the mirror entries found in the block on this new port
         * joining it.
         */
        err = dpaa2_switch_block_offload_mirror(block, port_priv);
        if (err)
                return err;

        /* If the port is already bound to this ACL table then do nothing. This
         * can happen when this port is the first one to join a tc block
         */
        if (port_priv->filter_block == block)
                return 0;

        err = dpaa2_switch_port_acl_tbl_unbind(port_priv, old_block);
        if (err)
                return err;

        /* Mark the previous ACL table as being unused if this was the last
         * port that was using it.
         */
        if (old_block->ports == 0)
                old_block->in_use = false;

        return dpaa2_switch_port_acl_tbl_bind(port_priv, block);
}

static int
dpaa2_switch_port_block_unbind(struct ethsw_port_priv *port_priv,
                               struct dpaa2_switch_filter_block *block)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpaa2_switch_filter_block *new_block;
        int err;

        /* Unoffload all the mirror entries found in the block from the
         * port leaving it.
         */
        err = dpaa2_switch_block_unoffload_mirror(block, port_priv);
        if (err)
                return err;

        /* We are the last port that leaves a block (an ACL table).
         * We'll continue to use this table.
         */
        if (block->ports == BIT(port_priv->idx))
                return 0;

        err = dpaa2_switch_port_acl_tbl_unbind(port_priv, block);
        if (err)
                return err;

        if (block->ports == 0)
                block->in_use = false;

        new_block = dpaa2_switch_filter_block_get_unused(ethsw);
        new_block->in_use = true;
        return dpaa2_switch_port_acl_tbl_bind(port_priv, new_block);
}

static int dpaa2_switch_setup_tc_block_bind(struct net_device *netdev,
                                            struct flow_block_offload *f)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpaa2_switch_filter_block *filter_block;
        struct flow_block_cb *block_cb;
        bool register_block = false;
        int err;

        block_cb = flow_block_cb_lookup(f->block,
                                        dpaa2_switch_port_setup_tc_block_cb_ig,
                                        ethsw);

        if (!block_cb) {
                /* If the filter block is not already known, then this port
                 * must be the first to join it. In this case, we can just
                 * continue to use our private table
                 */
                filter_block = port_priv->filter_block;

                block_cb = flow_block_cb_alloc(dpaa2_switch_port_setup_tc_block_cb_ig,
                                               ethsw, filter_block, NULL);
                if (IS_ERR(block_cb))
                        return PTR_ERR(block_cb);

                register_block = true;
        } else {
                filter_block = flow_block_cb_priv(block_cb);
        }

        flow_block_cb_incref(block_cb);
        err = dpaa2_switch_port_block_bind(port_priv, filter_block);
        if (err)
                goto err_block_bind;

        if (register_block) {
                flow_block_cb_add(block_cb, f);
                list_add_tail(&block_cb->driver_list,
                              &dpaa2_switch_block_cb_list);
        }

        return 0;

err_block_bind:
        if (!flow_block_cb_decref(block_cb))
                flow_block_cb_free(block_cb);
        return err;
}

static void dpaa2_switch_setup_tc_block_unbind(struct net_device *netdev,
                                               struct flow_block_offload *f)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpaa2_switch_filter_block *filter_block;
        struct flow_block_cb *block_cb;
        int err;

        block_cb = flow_block_cb_lookup(f->block,
                                        dpaa2_switch_port_setup_tc_block_cb_ig,
                                        ethsw);
        if (!block_cb)
                return;

        filter_block = flow_block_cb_priv(block_cb);
        err = dpaa2_switch_port_block_unbind(port_priv, filter_block);
        if (!err && !flow_block_cb_decref(block_cb)) {
                flow_block_cb_remove(block_cb, f);
                list_del(&block_cb->driver_list);
        }
}

static int dpaa2_switch_setup_tc_block(struct net_device *netdev,
                                       struct flow_block_offload *f)
{
        if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
                return -EOPNOTSUPP;

        f->driver_block_list = &dpaa2_switch_block_cb_list;

        switch (f->command) {
        case FLOW_BLOCK_BIND:
                return dpaa2_switch_setup_tc_block_bind(netdev, f);
        case FLOW_BLOCK_UNBIND:
                dpaa2_switch_setup_tc_block_unbind(netdev, f);
                return 0;
        default:
                return -EOPNOTSUPP;
        }
}

static int dpaa2_switch_port_setup_tc(struct net_device *netdev,
                                      enum tc_setup_type type,
                                      void *type_data)
{
        switch (type) {
        case TC_SETUP_BLOCK: {
                return dpaa2_switch_setup_tc_block(netdev, type_data);
        }
        default:
                return -EOPNOTSUPP;
        }

        return 0;
}

static const struct net_device_ops dpaa2_switch_port_ops = {
        .ndo_open               = dpaa2_switch_port_open,
        .ndo_stop               = dpaa2_switch_port_stop,

        .ndo_set_mac_address    = eth_mac_addr,
        .ndo_get_stats64        = dpaa2_switch_port_get_stats,
        .ndo_change_mtu         = dpaa2_switch_port_change_mtu,
        .ndo_has_offload_stats  = dpaa2_switch_port_has_offload_stats,
        .ndo_get_offload_stats  = dpaa2_switch_port_get_offload_stats,
        .ndo_fdb_dump           = dpaa2_switch_port_fdb_dump,
        .ndo_vlan_rx_add_vid    = dpaa2_switch_port_vlan_add,
        .ndo_vlan_rx_kill_vid   = dpaa2_switch_port_vlan_kill,

        .ndo_start_xmit         = dpaa2_switch_port_tx,
        .ndo_get_port_parent_id = dpaa2_switch_port_parent_id,
        .ndo_get_phys_port_name = dpaa2_switch_port_get_phys_name,
        .ndo_setup_tc           = dpaa2_switch_port_setup_tc,
};

bool dpaa2_switch_port_dev_check(const struct net_device *netdev)
{
        return netdev->netdev_ops == &dpaa2_switch_port_ops;
}

static int dpaa2_switch_port_connect_mac(struct ethsw_port_priv *port_priv)
{
        struct fsl_mc_device *dpsw_port_dev, *dpmac_dev;
        struct dpaa2_mac *mac;
        int err;

        dpsw_port_dev = to_fsl_mc_device(port_priv->netdev->dev.parent);
        dpmac_dev = fsl_mc_get_endpoint(dpsw_port_dev, port_priv->idx);

        if (PTR_ERR(dpmac_dev) == -EPROBE_DEFER)
                return PTR_ERR(dpmac_dev);

        if (IS_ERR(dpmac_dev))
                return 0;

        if (dpmac_dev->dev.type != &fsl_mc_bus_dpmac_type) {
                err = 0;
                goto out_put_device;
        }

        mac = kzalloc_obj(*mac);
        if (!mac) {
                err = -ENOMEM;
                goto out_put_device;
        }

        mac->mc_dev = dpmac_dev;
        mac->mc_io = port_priv->ethsw_data->mc_io;
        mac->net_dev = port_priv->netdev;

        err = dpaa2_mac_open(mac);
        if (err)
                goto err_free_mac;

        if (dpaa2_mac_is_type_phy(mac)) {
                err = dpaa2_mac_connect(mac);
                if (err) {
                        netdev_err(port_priv->netdev,
                                   "Error connecting to the MAC endpoint %pe\n",
                                   ERR_PTR(err));
                        goto err_close_mac;
                }
        }

        mutex_lock(&port_priv->mac_lock);
        port_priv->mac = mac;
        mutex_unlock(&port_priv->mac_lock);

        return 0;

err_close_mac:
        dpaa2_mac_close(mac);
err_free_mac:
        kfree(mac);
out_put_device:
        put_device(&dpmac_dev->dev);
        return err;
}

static void dpaa2_switch_port_disconnect_mac(struct ethsw_port_priv *port_priv)
{
        struct dpaa2_mac *mac;

        mutex_lock(&port_priv->mac_lock);
        mac = port_priv->mac;
        port_priv->mac = NULL;
        mutex_unlock(&port_priv->mac_lock);

        if (!mac)
                return;

        if (dpaa2_mac_is_type_phy(mac))
                dpaa2_mac_disconnect(mac);

        dpaa2_mac_close(mac);
        put_device(&mac->mc_dev->dev);
        kfree(mac);
}

static irqreturn_t dpaa2_switch_irq0_handler_thread(int irq_num, void *arg)
{
        struct device *dev = (struct device *)arg;
        struct ethsw_core *ethsw = dev_get_drvdata(dev);
        struct ethsw_port_priv *port_priv;
        int err, if_id;
        bool had_mac;
        u32 status;

        err = dpsw_get_irq_status(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                  DPSW_IRQ_INDEX_IF, &status);
        if (err) {
                dev_err(dev, "Can't get irq status (err %d)\n", err);
                goto out;
        }

        if_id = (status & 0xFFFF0000) >> 16;
        if (if_id >= ethsw->sw_attr.num_ifs) {
                dev_err(dev, "Invalid if_id %d in IRQ status\n", if_id);
                goto out_clear;
        }
        port_priv = ethsw->ports[if_id];

        if (status & DPSW_IRQ_EVENT_LINK_CHANGED)
                dpaa2_switch_port_link_state_update(port_priv->netdev);

        if (status & DPSW_IRQ_EVENT_ENDPOINT_CHANGED) {
                dpaa2_switch_port_set_mac_addr(port_priv);
                /* We can avoid locking because the "endpoint changed" IRQ
                 * handler is the only one who changes priv->mac at runtime,
                 * so we are not racing with anyone.
                 */
                had_mac = !!port_priv->mac;
                if (had_mac)
                        dpaa2_switch_port_disconnect_mac(port_priv);
                else
                        dpaa2_switch_port_connect_mac(port_priv);
        }

out_clear:
        err = dpsw_clear_irq_status(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                    DPSW_IRQ_INDEX_IF, status);
        if (err)
                dev_err(dev, "Can't clear irq status (err %d)\n", err);

out:
        return IRQ_HANDLED;
}

static int dpaa2_switch_setup_irqs(struct fsl_mc_device *sw_dev)
{
        u32 mask = DPSW_IRQ_EVENT_LINK_CHANGED | DPSW_IRQ_EVENT_ENDPOINT_CHANGED;
        struct device *dev = &sw_dev->dev;
        struct ethsw_core *ethsw = dev_get_drvdata(dev);
        struct fsl_mc_device_irq *irq;
        int err;

        err = fsl_mc_allocate_irqs(sw_dev);
        if (err) {
                dev_err(dev, "MC irqs allocation failed\n");
                return err;
        }

        if (WARN_ON(sw_dev->obj_desc.irq_count != DPSW_IRQ_NUM)) {
                err = -EINVAL;
                goto free_irq;
        }

        err = dpsw_set_irq_enable(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                  DPSW_IRQ_INDEX_IF, 0);
        if (err) {
                dev_err(dev, "dpsw_set_irq_enable err %d\n", err);
                goto free_irq;
        }

        irq = sw_dev->irqs[DPSW_IRQ_INDEX_IF];

        err = devm_request_threaded_irq(dev, irq->virq, NULL,
                                        dpaa2_switch_irq0_handler_thread,
                                        IRQF_NO_SUSPEND | IRQF_ONESHOT,
                                        dev_name(dev), dev);
        if (err) {
                dev_err(dev, "devm_request_threaded_irq(): %d\n", err);
                goto free_irq;
        }

        err = dpsw_set_irq_mask(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                DPSW_IRQ_INDEX_IF, mask);
        if (err) {
                dev_err(dev, "dpsw_set_irq_mask(): %d\n", err);
                goto free_devm_irq;
        }

        err = dpsw_set_irq_enable(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                  DPSW_IRQ_INDEX_IF, 1);
        if (err) {
                dev_err(dev, "dpsw_set_irq_enable(): %d\n", err);
                goto free_devm_irq;
        }

        return 0;

free_devm_irq:
        devm_free_irq(dev, irq->virq, dev);
free_irq:
        fsl_mc_free_irqs(sw_dev);
        return err;
}

static void dpaa2_switch_teardown_irqs(struct fsl_mc_device *sw_dev)
{
        struct device *dev = &sw_dev->dev;
        struct ethsw_core *ethsw = dev_get_drvdata(dev);
        int err;

        err = dpsw_set_irq_enable(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                  DPSW_IRQ_INDEX_IF, 0);
        if (err)
                dev_err(dev, "dpsw_set_irq_enable err %d\n", err);

        fsl_mc_free_irqs(sw_dev);
}

static int dpaa2_switch_port_set_learning(struct ethsw_port_priv *port_priv, bool enable)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        enum dpsw_learning_mode learn_mode;
        int err;

        if (enable)
                learn_mode = DPSW_LEARNING_MODE_HW;
        else
                learn_mode = DPSW_LEARNING_MODE_DIS;

        err = dpsw_if_set_learning_mode(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                        port_priv->idx, learn_mode);
        if (err)
                netdev_err(port_priv->netdev, "dpsw_if_set_learning_mode err %d\n", err);

        if (!enable)
                dpaa2_switch_port_fast_age(port_priv);

        return err;
}

static int dpaa2_switch_port_attr_stp_state_set(struct net_device *netdev,
                                                u8 state)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        int err;

        err = dpaa2_switch_port_set_stp_state(port_priv, state);
        if (err)
                return err;

        switch (state) {
        case BR_STATE_DISABLED:
        case BR_STATE_BLOCKING:
        case BR_STATE_LISTENING:
                err = dpaa2_switch_port_set_learning(port_priv, false);
                break;
        case BR_STATE_LEARNING:
        case BR_STATE_FORWARDING:
                err = dpaa2_switch_port_set_learning(port_priv,
                                                     port_priv->learn_ena);
                break;
        }

        return err;
}

static int dpaa2_switch_port_flood(struct ethsw_port_priv *port_priv,
                                   struct switchdev_brport_flags flags)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;

        if (flags.mask & BR_BCAST_FLOOD)
                port_priv->bcast_flood = !!(flags.val & BR_BCAST_FLOOD);

        if (flags.mask & BR_FLOOD)
                port_priv->ucast_flood = !!(flags.val & BR_FLOOD);

        return dpaa2_switch_fdb_set_egress_flood(ethsw, port_priv->fdb->fdb_id);
}

static int dpaa2_switch_port_pre_bridge_flags(struct net_device *netdev,
                                              struct switchdev_brport_flags flags,
                                              struct netlink_ext_ack *extack)
{
        if (flags.mask & ~(BR_LEARNING | BR_BCAST_FLOOD | BR_FLOOD |
                           BR_MCAST_FLOOD))
                return -EINVAL;

        if (flags.mask & (BR_FLOOD | BR_MCAST_FLOOD)) {
                bool multicast = !!(flags.val & BR_MCAST_FLOOD);
                bool unicast = !!(flags.val & BR_FLOOD);

                if (unicast != multicast) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Cannot configure multicast flooding independently of unicast");
                        return -EINVAL;
                }
        }

        return 0;
}

static int dpaa2_switch_port_bridge_flags(struct net_device *netdev,
                                          struct switchdev_brport_flags flags,
                                          struct netlink_ext_ack *extack)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        int err;

        if (flags.mask & BR_LEARNING) {
                bool learn_ena = !!(flags.val & BR_LEARNING);

                err = dpaa2_switch_port_set_learning(port_priv, learn_ena);
                if (err)
                        return err;
                port_priv->learn_ena = learn_ena;
        }

        if (flags.mask & (BR_BCAST_FLOOD | BR_FLOOD | BR_MCAST_FLOOD)) {
                err = dpaa2_switch_port_flood(port_priv, flags);
                if (err)
                        return err;
        }

        return 0;
}

static int dpaa2_switch_port_attr_set(struct net_device *netdev, const void *ctx,
                                      const struct switchdev_attr *attr,
                                      struct netlink_ext_ack *extack)
{
        int err = 0;

        switch (attr->id) {
        case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
                err = dpaa2_switch_port_attr_stp_state_set(netdev,
                                                           attr->u.stp_state);
                break;
        case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
                if (!attr->u.vlan_filtering) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "The DPAA2 switch does not support VLAN-unaware operation");
                        return -EOPNOTSUPP;
                }
                break;
        case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
                err = dpaa2_switch_port_pre_bridge_flags(netdev, attr->u.brport_flags, extack);
                break;
        case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
                err = dpaa2_switch_port_bridge_flags(netdev, attr->u.brport_flags, extack);
                break;
        default:
                err = -EOPNOTSUPP;
                break;
        }

        return err;
}

int dpaa2_switch_port_vlans_add(struct net_device *netdev,
                                const struct switchdev_obj_port_vlan *vlan)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpsw_attr *attr = &ethsw->sw_attr;
        int err = 0;

        if (!port_priv->ethsw_data->vlans[vlan->vid]) {
                /* Only check for space in case this is a new VLAN from the
                 * DPSW perspective
                 */
                err = dpsw_get_attributes(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                          &ethsw->sw_attr);
                if (err) {
                        netdev_err(netdev, "dpsw_get_attributes err %d\n", err);
                        return err;
                }
                if (attr->max_vlans - attr->num_vlans < 1)
                        return -ENOSPC;

                /* this is a new VLAN */
                err = dpaa2_switch_add_vlan(port_priv, vlan->vid);
                if (err)
                        return err;

                port_priv->ethsw_data->vlans[vlan->vid] |= ETHSW_VLAN_GLOBAL;
        }

        return dpaa2_switch_port_add_vlan(port_priv, vlan->vid, vlan->flags,
                                          vlan->changed);
}

static int dpaa2_switch_port_lookup_address(struct net_device *netdev, int is_uc,
                                            const unsigned char *addr)
{
        struct netdev_hw_addr_list *list = (is_uc) ? &netdev->uc : &netdev->mc;
        struct netdev_hw_addr *ha;

        netif_addr_lock_bh(netdev);
        list_for_each_entry(ha, &list->list, list) {
                if (ether_addr_equal(ha->addr, addr)) {
                        netif_addr_unlock_bh(netdev);
                        return 1;
                }
        }
        netif_addr_unlock_bh(netdev);
        return 0;
}

static int dpaa2_switch_port_mdb_add(struct net_device *netdev,
                                     const struct switchdev_obj_port_mdb *mdb)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        int err;

        /* Check if address is already set on this port */
        if (dpaa2_switch_port_lookup_address(netdev, 0, mdb->addr))
                return -EEXIST;

        err = dpaa2_switch_port_fdb_add_mc(port_priv, mdb->addr);
        if (err)
                return err;

        err = dev_mc_add(netdev, mdb->addr);
        if (err) {
                netdev_err(netdev, "dev_mc_add err %d\n", err);
                dpaa2_switch_port_fdb_del_mc(port_priv, mdb->addr);
        }

        return err;
}

static int dpaa2_switch_port_obj_add(struct net_device *netdev,
                                     const struct switchdev_obj *obj)
{
        int err;

        switch (obj->id) {
        case SWITCHDEV_OBJ_ID_PORT_VLAN:
                err = dpaa2_switch_port_vlans_add(netdev,
                                                  SWITCHDEV_OBJ_PORT_VLAN(obj));
                break;
        case SWITCHDEV_OBJ_ID_PORT_MDB:
                err = dpaa2_switch_port_mdb_add(netdev,
                                                SWITCHDEV_OBJ_PORT_MDB(obj));
                break;
        default:
                err = -EOPNOTSUPP;
                break;
        }

        return err;
}

static int dpaa2_switch_port_del_vlan(struct ethsw_port_priv *port_priv, u16 vid)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct net_device *netdev = port_priv->netdev;
        struct dpsw_vlan_if_cfg vcfg;
        int i, err;

        if (!port_priv->vlans[vid])
                return -ENOENT;

        if (port_priv->vlans[vid] & ETHSW_VLAN_PVID) {
                /* If we are deleting the PVID of a port, use VLAN 4095 instead
                 * as we are sure that neither the bridge nor the 8021q module
                 * will use it
                 */
                err = dpaa2_switch_port_set_pvid(port_priv, 4095);
                if (err)
                        return err;
        }

        vcfg.num_ifs = 1;
        vcfg.if_id[0] = port_priv->idx;
        if (port_priv->vlans[vid] & ETHSW_VLAN_UNTAGGED) {
                err = dpsw_vlan_remove_if_untagged(ethsw->mc_io, 0,
                                                   ethsw->dpsw_handle,
                                                   vid, &vcfg);
                if (err) {
                        netdev_err(netdev,
                                   "dpsw_vlan_remove_if_untagged err %d\n",
                                   err);
                }
                port_priv->vlans[vid] &= ~ETHSW_VLAN_UNTAGGED;
        }

        if (port_priv->vlans[vid] & ETHSW_VLAN_MEMBER) {
                err = dpsw_vlan_remove_if(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                          vid, &vcfg);
                if (err) {
                        netdev_err(netdev,
                                   "dpsw_vlan_remove_if err %d\n", err);
                        return err;
                }
                port_priv->vlans[vid] &= ~ETHSW_VLAN_MEMBER;

                /* Delete VLAN from switch if it is no longer configured on
                 * any port
                 */
                for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
                        if (ethsw->ports[i] &&
                            ethsw->ports[i]->vlans[vid] & ETHSW_VLAN_MEMBER)
                                return 0; /* Found a port member in VID */
                }

                ethsw->vlans[vid] &= ~ETHSW_VLAN_GLOBAL;

                err = dpaa2_switch_dellink(ethsw, vid);
                if (err)
                        return err;
        }

        return 0;
}

int dpaa2_switch_port_vlans_del(struct net_device *netdev,
                                const struct switchdev_obj_port_vlan *vlan)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);

        if (netif_is_bridge_master(vlan->obj.orig_dev))
                return -EOPNOTSUPP;

        return dpaa2_switch_port_del_vlan(port_priv, vlan->vid);
}

static int dpaa2_switch_port_mdb_del(struct net_device *netdev,
                                     const struct switchdev_obj_port_mdb *mdb)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        int err;

        if (!dpaa2_switch_port_lookup_address(netdev, 0, mdb->addr))
                return -ENOENT;

        err = dpaa2_switch_port_fdb_del_mc(port_priv, mdb->addr);
        if (err)
                return err;

        err = dev_mc_del(netdev, mdb->addr);
        if (err) {
                netdev_err(netdev, "dev_mc_del err %d\n", err);
                return err;
        }

        return err;
}

static int dpaa2_switch_port_obj_del(struct net_device *netdev,
                                     const struct switchdev_obj *obj)
{
        int err;

        switch (obj->id) {
        case SWITCHDEV_OBJ_ID_PORT_VLAN:
                err = dpaa2_switch_port_vlans_del(netdev, SWITCHDEV_OBJ_PORT_VLAN(obj));
                break;
        case SWITCHDEV_OBJ_ID_PORT_MDB:
                err = dpaa2_switch_port_mdb_del(netdev, SWITCHDEV_OBJ_PORT_MDB(obj));
                break;
        default:
                err = -EOPNOTSUPP;
                break;
        }
        return err;
}

static int dpaa2_switch_port_attr_set_event(struct net_device *netdev,
                                            struct switchdev_notifier_port_attr_info *ptr)
{
        int err;

        err = switchdev_handle_port_attr_set(netdev, ptr,
                                             dpaa2_switch_port_dev_check,
                                             dpaa2_switch_port_attr_set);
        return notifier_from_errno(err);
}

static int dpaa2_switch_port_bridge_join(struct net_device *netdev,
                                         struct net_device *upper_dev,
                                         struct netlink_ext_ack *extack)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct dpaa2_switch_fdb *old_fdb = port_priv->fdb;
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        bool learn_ena;
        int err;

        /* Delete the previously manually installed VLAN 1 */
        err = dpaa2_switch_port_del_vlan(port_priv, 1);
        if (err)
                return err;

        dpaa2_switch_port_set_fdb(port_priv, upper_dev, true);

        /* Inherit the initial bridge port learning state */
        learn_ena = br_port_flag_is_set(netdev, BR_LEARNING);
        err = dpaa2_switch_port_set_learning(port_priv, learn_ena);
        port_priv->learn_ena = learn_ena;

        /* Setup the egress flood policy (broadcast, unknown unicast) */
        err = dpaa2_switch_fdb_set_egress_flood(ethsw, port_priv->fdb->fdb_id);
        if (err)
                goto err_egress_flood;

        /* Recreate the egress flood domain of the FDB that we just left. */
        err = dpaa2_switch_fdb_set_egress_flood(ethsw, old_fdb->fdb_id);
        if (err)
                goto err_egress_flood;

        err = switchdev_bridge_port_offload(netdev, netdev, NULL,
                                            NULL, NULL, false, extack);
        if (err)
                goto err_switchdev_offload;

        return 0;

err_switchdev_offload:
err_egress_flood:
        dpaa2_switch_port_set_fdb(port_priv, upper_dev, false);
        return err;
}

static int dpaa2_switch_port_clear_rxvlan(struct net_device *vdev, int vid, void *arg)
{
        __be16 vlan_proto = htons(ETH_P_8021Q);

        if (vdev)
                vlan_proto = vlan_dev_vlan_proto(vdev);

        return dpaa2_switch_port_vlan_kill(arg, vlan_proto, vid);
}

static int dpaa2_switch_port_restore_rxvlan(struct net_device *vdev, int vid, void *arg)
{
        __be16 vlan_proto = htons(ETH_P_8021Q);

        if (vdev)
                vlan_proto = vlan_dev_vlan_proto(vdev);

        return dpaa2_switch_port_vlan_add(arg, vlan_proto, vid);
}

static void dpaa2_switch_port_pre_bridge_leave(struct net_device *netdev)
{
        switchdev_bridge_port_unoffload(netdev, NULL, NULL, NULL);
}

static int dpaa2_switch_port_bridge_leave(struct net_device *netdev)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct dpaa2_switch_fdb *old_fdb = port_priv->fdb;
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        int err;

        /* First of all, fast age any learn FDB addresses on this switch port */
        dpaa2_switch_port_fast_age(port_priv);

        /* Clear all RX VLANs installed through vlan_vid_add() either as VLAN
         * upper devices or otherwise from the FDB table that we are about to
         * leave
         */
        err = vlan_for_each(netdev, dpaa2_switch_port_clear_rxvlan, netdev);
        if (err)
                netdev_err(netdev, "Unable to clear RX VLANs from old FDB table, err (%d)\n", err);

        dpaa2_switch_port_set_fdb(port_priv, port_priv->fdb->bridge_dev, false);

        /* Restore all RX VLANs into the new FDB table that we just joined */
        err = vlan_for_each(netdev, dpaa2_switch_port_restore_rxvlan, netdev);
        if (err)
                netdev_err(netdev, "Unable to restore RX VLANs to the new FDB, err (%d)\n", err);

        /* Reset the flooding state to denote that this port can send any
         * packet in standalone mode. With this, we are also ensuring that any
         * later bridge join will have the flooding flag on.
         */
        port_priv->bcast_flood = true;
        port_priv->ucast_flood = true;

        /* Setup the egress flood policy (broadcast, unknown unicast).
         * When the port is not under a bridge, only the CTRL interface is part
         * of the flooding domain besides the actual port
         */
        err = dpaa2_switch_fdb_set_egress_flood(ethsw, port_priv->fdb->fdb_id);
        if (err)
                return err;

        /* Recreate the egress flood domain of the FDB that we just left */
        err = dpaa2_switch_fdb_set_egress_flood(ethsw, old_fdb->fdb_id);
        if (err)
                return err;

        /* No HW learning when not under a bridge */
        err = dpaa2_switch_port_set_learning(port_priv, false);
        if (err)
                return err;
        port_priv->learn_ena = false;

        /* Add the VLAN 1 as PVID when not under a bridge. We need this since
         * the dpaa2 switch interfaces are not capable to be VLAN unaware
         */
        return dpaa2_switch_port_add_vlan(port_priv, DEFAULT_VLAN_ID,
                                          BRIDGE_VLAN_INFO_UNTAGGED | BRIDGE_VLAN_INFO_PVID,
                                          false);
}

static int dpaa2_switch_prevent_bridging_with_8021q_upper(struct net_device *netdev)
{
        struct net_device *upper_dev;
        struct list_head *iter;

        /* RCU read lock not necessary because we have write-side protection
         * (rtnl_mutex), however a non-rcu iterator does not exist.
         */
        netdev_for_each_upper_dev_rcu(netdev, upper_dev, iter)
                if (is_vlan_dev(upper_dev))
                        return -EOPNOTSUPP;

        return 0;
}

static int
dpaa2_switch_prechangeupper_sanity_checks(struct net_device *netdev,
                                          struct net_device *upper_dev,
                                          struct netlink_ext_ack *extack)
{
        struct ethsw_port_priv *port_priv = netdev_priv(netdev);
        struct ethsw_port_priv *other_port_priv;
        struct net_device *other_dev;
        struct list_head *iter;
        int err;

        if (!br_vlan_enabled(upper_dev)) {
                NL_SET_ERR_MSG_MOD(extack, "Cannot join a VLAN-unaware bridge");
                return -EOPNOTSUPP;
        }

        err = dpaa2_switch_prevent_bridging_with_8021q_upper(netdev);
        if (err) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Cannot join a bridge while VLAN uppers are present");
                return err;
        }

        netdev_for_each_lower_dev(upper_dev, other_dev, iter) {
                if (!dpaa2_switch_port_dev_check(other_dev))
                        continue;

                other_port_priv = netdev_priv(other_dev);
                if (other_port_priv->ethsw_data != port_priv->ethsw_data) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Interface from a different DPSW is in the bridge already");
                        return -EINVAL;
                }
        }

        return 0;
}

static int dpaa2_switch_port_prechangeupper(struct net_device *netdev,
                                            struct netdev_notifier_changeupper_info *info)
{
        struct ethsw_port_priv *port_priv;
        struct netlink_ext_ack *extack;
        struct net_device *upper_dev;
        int err;

        if (!dpaa2_switch_port_dev_check(netdev))
                return 0;

        extack = netdev_notifier_info_to_extack(&info->info);
        upper_dev = info->upper_dev;
        if (netif_is_bridge_master(upper_dev)) {
                err = dpaa2_switch_prechangeupper_sanity_checks(netdev,
                                                                upper_dev,
                                                                extack);
                if (err)
                        return err;

                if (!info->linking)
                        dpaa2_switch_port_pre_bridge_leave(netdev);
        } else if (is_vlan_dev(upper_dev)) {
                port_priv = netdev_priv(netdev);
                if (port_priv->fdb->bridge_dev) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Cannot accept VLAN uppers while bridged");
                        return -EOPNOTSUPP;
                }
        }

        return 0;
}

static int dpaa2_switch_port_changeupper(struct net_device *netdev,
                                         struct netdev_notifier_changeupper_info *info)
{
        struct netlink_ext_ack *extack;
        struct net_device *upper_dev;

        if (!dpaa2_switch_port_dev_check(netdev))
                return 0;

        extack = netdev_notifier_info_to_extack(&info->info);

        upper_dev = info->upper_dev;
        if (netif_is_bridge_master(upper_dev)) {
                if (info->linking)
                        return dpaa2_switch_port_bridge_join(netdev,
                                                             upper_dev,
                                                             extack);
                else
                        return dpaa2_switch_port_bridge_leave(netdev);
        }

        return 0;
}

static int dpaa2_switch_port_netdevice_event(struct notifier_block *nb,
                                             unsigned long event, void *ptr)
{
        struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
        int err = 0;

        switch (event) {
        case NETDEV_PRECHANGEUPPER:
                err = dpaa2_switch_port_prechangeupper(netdev, ptr);
                if (err)
                        return notifier_from_errno(err);

                break;
        case NETDEV_CHANGEUPPER:
                err = dpaa2_switch_port_changeupper(netdev, ptr);
                if (err)
                        return notifier_from_errno(err);

                break;
        }

        return NOTIFY_DONE;
}

struct ethsw_switchdev_event_work {
        struct work_struct work;
        struct switchdev_notifier_fdb_info fdb_info;
        struct net_device *dev;
        unsigned long event;
};

static void dpaa2_switch_event_work(struct work_struct *work)
{
        struct ethsw_switchdev_event_work *switchdev_work =
                container_of(work, struct ethsw_switchdev_event_work, work);
        struct net_device *dev = switchdev_work->dev;
        struct switchdev_notifier_fdb_info *fdb_info;
        int err;

        rtnl_lock();
        fdb_info = &switchdev_work->fdb_info;

        switch (switchdev_work->event) {
        case SWITCHDEV_FDB_ADD_TO_DEVICE:
                if (!fdb_info->added_by_user || fdb_info->is_local)
                        break;
                if (is_unicast_ether_addr(fdb_info->addr))
                        err = dpaa2_switch_port_fdb_add_uc(netdev_priv(dev),
                                                           fdb_info->addr);
                else
                        err = dpaa2_switch_port_fdb_add_mc(netdev_priv(dev),
                                                           fdb_info->addr);
                if (err)
                        break;
                fdb_info->offloaded = true;
                call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
                                         &fdb_info->info, NULL);
                break;
        case SWITCHDEV_FDB_DEL_TO_DEVICE:
                if (!fdb_info->added_by_user || fdb_info->is_local)
                        break;
                if (is_unicast_ether_addr(fdb_info->addr))
                        dpaa2_switch_port_fdb_del_uc(netdev_priv(dev), fdb_info->addr);
                else
                        dpaa2_switch_port_fdb_del_mc(netdev_priv(dev), fdb_info->addr);
                break;
        }

        rtnl_unlock();
        kfree(switchdev_work->fdb_info.addr);
        kfree(switchdev_work);
        dev_put(dev);
}

/* Called under rcu_read_lock() */
static int dpaa2_switch_port_event(struct notifier_block *nb,
                                   unsigned long event, void *ptr)
{
        struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
        struct ethsw_port_priv *port_priv = netdev_priv(dev);
        struct ethsw_switchdev_event_work *switchdev_work;
        struct switchdev_notifier_fdb_info *fdb_info = ptr;
        struct ethsw_core *ethsw = port_priv->ethsw_data;

        if (event == SWITCHDEV_PORT_ATTR_SET)
                return dpaa2_switch_port_attr_set_event(dev, ptr);

        if (!dpaa2_switch_port_dev_check(dev))
                return NOTIFY_DONE;

        switchdev_work = kzalloc_obj(*switchdev_work, GFP_ATOMIC);
        if (!switchdev_work)
                return NOTIFY_BAD;

        INIT_WORK(&switchdev_work->work, dpaa2_switch_event_work);
        switchdev_work->dev = dev;
        switchdev_work->event = event;

        switch (event) {
        case SWITCHDEV_FDB_ADD_TO_DEVICE:
        case SWITCHDEV_FDB_DEL_TO_DEVICE:
                memcpy(&switchdev_work->fdb_info, ptr,
                       sizeof(switchdev_work->fdb_info));
                switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
                if (!switchdev_work->fdb_info.addr)
                        goto err_addr_alloc;

                ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
                                fdb_info->addr);

                /* Take a reference on the device to avoid being freed. */
                dev_hold(dev);
                break;
        default:
                kfree(switchdev_work);
                return NOTIFY_DONE;
        }

        queue_work(ethsw->workqueue, &switchdev_work->work);

        return NOTIFY_DONE;

err_addr_alloc:
        kfree(switchdev_work);
        return NOTIFY_BAD;
}

static int dpaa2_switch_port_obj_event(unsigned long event,
                                       struct net_device *netdev,
                                       struct switchdev_notifier_port_obj_info *port_obj_info)
{
        int err = -EOPNOTSUPP;

        if (!dpaa2_switch_port_dev_check(netdev))
                return NOTIFY_DONE;

        switch (event) {
        case SWITCHDEV_PORT_OBJ_ADD:
                err = dpaa2_switch_port_obj_add(netdev, port_obj_info->obj);
                break;
        case SWITCHDEV_PORT_OBJ_DEL:
                err = dpaa2_switch_port_obj_del(netdev, port_obj_info->obj);
                break;
        }

        port_obj_info->handled = true;
        return notifier_from_errno(err);
}

static int dpaa2_switch_port_blocking_event(struct notifier_block *nb,
                                            unsigned long event, void *ptr)
{
        struct net_device *dev = switchdev_notifier_info_to_dev(ptr);

        switch (event) {
        case SWITCHDEV_PORT_OBJ_ADD:
        case SWITCHDEV_PORT_OBJ_DEL:
                return dpaa2_switch_port_obj_event(event, dev, ptr);
        case SWITCHDEV_PORT_ATTR_SET:
                return dpaa2_switch_port_attr_set_event(dev, ptr);
        }

        return NOTIFY_DONE;
}

/* Build a linear skb based on a single-buffer frame descriptor */
static struct sk_buff *dpaa2_switch_build_linear_skb(struct ethsw_core *ethsw,
                                                     const struct dpaa2_fd *fd,
                                                     void *fd_vaddr)
{
        u16 fd_offset = dpaa2_fd_get_offset(fd);
        u32 fd_length = dpaa2_fd_get_len(fd);
        struct device *dev = ethsw->dev;
        struct sk_buff *skb = NULL;

        skb = build_skb(fd_vaddr, DPAA2_SWITCH_RX_BUF_SIZE +
                        SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
        if (unlikely(!skb)) {
                dev_err(dev, "build_skb() failed\n");
                return NULL;
        }

        skb_reserve(skb, fd_offset);
        skb_put(skb, fd_length);

        ethsw->buf_count--;

        return skb;
}

static void dpaa2_switch_tx_conf(struct dpaa2_switch_fq *fq,
                                 const struct dpaa2_fd *fd)
{
        dpaa2_switch_free_fd(fq->ethsw, fd);
}

static void dpaa2_switch_rx(struct dpaa2_switch_fq *fq,
                            const struct dpaa2_fd *fd)
{
        dma_addr_t addr = dpaa2_fd_get_addr(fd);
        struct ethsw_core *ethsw = fq->ethsw;
        struct ethsw_port_priv *port_priv;
        struct net_device *netdev;
        struct vlan_ethhdr *hdr;
        struct sk_buff *skb;
        u16 vlan_tci, vid;
        int if_id, err;
        void *vaddr;

        vaddr = dpaa2_iova_to_virt(ethsw->iommu_domain, addr);
        dma_unmap_page(ethsw->dev, addr, DPAA2_SWITCH_RX_BUF_SIZE,
                       DMA_FROM_DEVICE);

        /* get switch ingress interface ID */
        if_id = upper_32_bits(dpaa2_fd_get_flc(fd)) & 0x0000FFFF;
        if (if_id >= ethsw->sw_attr.num_ifs) {
                dev_err(ethsw->dev, "Frame received from unknown interface!\n");
                goto err_free_fd;
        }
        port_priv = ethsw->ports[if_id];
        netdev = port_priv->netdev;

        /* build the SKB based on the FD received */
        if (dpaa2_fd_get_format(fd) != dpaa2_fd_single) {
                if (net_ratelimit()) {
                        netdev_err(netdev, "Received invalid frame format\n");
                        goto err_free_fd;
                }
        }

        skb = dpaa2_switch_build_linear_skb(ethsw, fd, vaddr);
        if (unlikely(!skb))
                goto err_free_fd;

        skb_reset_mac_header(skb);

        /* Remove the VLAN header if the packet that we just received has a vid
         * equal to the port PVIDs. Since the dpaa2-switch can operate only in
         * VLAN-aware mode and no alterations are made on the packet when it's
         * redirected/mirrored to the control interface, we are sure that there
         * will always be a VLAN header present.
         */
        hdr = vlan_eth_hdr(skb);
        vid = ntohs(hdr->h_vlan_TCI) & VLAN_VID_MASK;
        if (vid == port_priv->pvid) {
                err = __skb_vlan_pop(skb, &vlan_tci);
                if (err) {
                        dev_info(ethsw->dev, "__skb_vlan_pop() returned %d", err);
                        kfree_skb(skb);
                        return;
                }
        }

        skb->dev = netdev;
        skb->protocol = eth_type_trans(skb, skb->dev);

        /* Setup the offload_fwd_mark only if the port is under a bridge */
        skb->offload_fwd_mark = !!(port_priv->fdb->bridge_dev);

        netif_receive_skb(skb);

        return;

err_free_fd:
        free_pages((unsigned long)vaddr, 0);
}

static void dpaa2_switch_detect_features(struct ethsw_core *ethsw)
{
        ethsw->features = 0;

        if (ethsw->major > 8 || (ethsw->major == 8 && ethsw->minor >= 6))
                ethsw->features |= ETHSW_FEATURE_MAC_ADDR;
}

static int dpaa2_switch_setup_fqs(struct ethsw_core *ethsw)
{
        struct dpsw_ctrl_if_attr ctrl_if_attr;
        struct device *dev = ethsw->dev;
        int i = 0;
        int err;

        err = dpsw_ctrl_if_get_attributes(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                          &ctrl_if_attr);
        if (err) {
                dev_err(dev, "dpsw_ctrl_if_get_attributes() = %d\n", err);
                return err;
        }

        ethsw->fq[i].fqid = ctrl_if_attr.rx_fqid;
        ethsw->fq[i].ethsw = ethsw;
        ethsw->fq[i++].type = DPSW_QUEUE_RX;

        ethsw->fq[i].fqid = ctrl_if_attr.tx_err_conf_fqid;
        ethsw->fq[i].ethsw = ethsw;
        ethsw->fq[i++].type = DPSW_QUEUE_TX_ERR_CONF;

        return 0;
}

/* Free buffers acquired from the buffer pool or which were meant to
 * be released in the pool
 */
static void dpaa2_switch_free_bufs(struct ethsw_core *ethsw, u64 *buf_array, int count)
{
        struct device *dev = ethsw->dev;
        void *vaddr;
        int i;

        for (i = 0; i < count; i++) {
                vaddr = dpaa2_iova_to_virt(ethsw->iommu_domain, buf_array[i]);
                dma_unmap_page(dev, buf_array[i], DPAA2_SWITCH_RX_BUF_SIZE,
                               DMA_FROM_DEVICE);
                free_pages((unsigned long)vaddr, 0);
        }
}

/* Perform a single release command to add buffers
 * to the specified buffer pool
 */
static int dpaa2_switch_add_bufs(struct ethsw_core *ethsw, u16 bpid)
{
        struct device *dev = ethsw->dev;
        u64 buf_array[BUFS_PER_CMD];
        struct page *page;
        int retries = 0;
        dma_addr_t addr;
        int err;
        int i;

        for (i = 0; i < BUFS_PER_CMD; i++) {
                /* Allocate one page for each Rx buffer. WRIOP sees
                 * the entire page except for a tailroom reserved for
                 * skb shared info
                 */
                page = dev_alloc_pages(0);
                if (!page) {
                        dev_err(dev, "buffer allocation failed\n");
                        goto err_alloc;
                }

                addr = dma_map_page(dev, page, 0, DPAA2_SWITCH_RX_BUF_SIZE,
                                    DMA_FROM_DEVICE);
                if (dma_mapping_error(dev, addr)) {
                        dev_err(dev, "dma_map_single() failed\n");
                        goto err_map;
                }
                buf_array[i] = addr;
        }

release_bufs:
        /* In case the portal is busy, retry until successful or
         * max retries hit.
         */
        while ((err = dpaa2_io_service_release(NULL, bpid,
                                               buf_array, i)) == -EBUSY) {
                if (retries++ >= DPAA2_SWITCH_SWP_BUSY_RETRIES)
                        break;

                cpu_relax();
        }

        /* If release command failed, clean up and bail out. */
        if (err) {
                dpaa2_switch_free_bufs(ethsw, buf_array, i);
                return 0;
        }

        return i;

err_map:
        __free_pages(page, 0);
err_alloc:
        /* If we managed to allocate at least some buffers,
         * release them to hardware
         */
        if (i)
                goto release_bufs;

        return 0;
}

static int dpaa2_switch_refill_bp(struct ethsw_core *ethsw)
{
        int *count = &ethsw->buf_count;
        int new_count;
        int err = 0;

        if (unlikely(*count < DPAA2_ETHSW_REFILL_THRESH)) {
                do {
                        new_count = dpaa2_switch_add_bufs(ethsw, ethsw->bpid);
                        if (unlikely(!new_count)) {
                                /* Out of memory; abort for now, we'll
                                 * try later on
                                 */
                                break;
                        }
                        *count += new_count;
                } while (*count < DPAA2_ETHSW_NUM_BUFS);

                if (unlikely(*count < DPAA2_ETHSW_NUM_BUFS))
                        err = -ENOMEM;
        }

        return err;
}

static int dpaa2_switch_seed_bp(struct ethsw_core *ethsw)
{
        int *count, ret, i;

        for (i = 0; i < DPAA2_ETHSW_NUM_BUFS; i += BUFS_PER_CMD) {
                ret = dpaa2_switch_add_bufs(ethsw, ethsw->bpid);
                count = &ethsw->buf_count;
                *count += ret;

                if (unlikely(ret < BUFS_PER_CMD))
                        return -ENOMEM;
        }

        return 0;
}

static void dpaa2_switch_drain_bp(struct ethsw_core *ethsw)
{
        u64 buf_array[BUFS_PER_CMD];
        int ret;

        do {
                ret = dpaa2_io_service_acquire(NULL, ethsw->bpid,
                                               buf_array, BUFS_PER_CMD);
                if (ret < 0) {
                        dev_err(ethsw->dev,
                                "dpaa2_io_service_acquire() = %d\n", ret);
                        return;
                }
                dpaa2_switch_free_bufs(ethsw, buf_array, ret);

        } while (ret);
}

static int dpaa2_switch_setup_dpbp(struct ethsw_core *ethsw)
{
        struct dpsw_ctrl_if_pools_cfg dpsw_ctrl_if_pools_cfg = { 0 };
        struct device *dev = ethsw->dev;
        struct fsl_mc_device *dpbp_dev;
        struct dpbp_attr dpbp_attrs;
        int err;

        err = fsl_mc_object_allocate(to_fsl_mc_device(dev), FSL_MC_POOL_DPBP,
                                     &dpbp_dev);
        if (err) {
                if (err == -ENXIO)
                        err = -EPROBE_DEFER;
                else
                        dev_err(dev, "DPBP device allocation failed\n");
                return err;
        }
        ethsw->dpbp_dev = dpbp_dev;

        err = dpbp_open(ethsw->mc_io, 0, dpbp_dev->obj_desc.id,
                        &dpbp_dev->mc_handle);
        if (err) {
                dev_err(dev, "dpbp_open() failed\n");
                goto err_open;
        }

        err = dpbp_reset(ethsw->mc_io, 0, dpbp_dev->mc_handle);
        if (err) {
                dev_err(dev, "dpbp_reset() failed\n");
                goto err_reset;
        }

        err = dpbp_enable(ethsw->mc_io, 0, dpbp_dev->mc_handle);
        if (err) {
                dev_err(dev, "dpbp_enable() failed\n");
                goto err_enable;
        }

        err = dpbp_get_attributes(ethsw->mc_io, 0, dpbp_dev->mc_handle,
                                  &dpbp_attrs);
        if (err) {
                dev_err(dev, "dpbp_get_attributes() failed\n");
                goto err_get_attr;
        }

        dpsw_ctrl_if_pools_cfg.num_dpbp = 1;
        dpsw_ctrl_if_pools_cfg.pools[0].dpbp_id = dpbp_attrs.id;
        dpsw_ctrl_if_pools_cfg.pools[0].buffer_size = DPAA2_SWITCH_RX_BUF_SIZE;
        dpsw_ctrl_if_pools_cfg.pools[0].backup_pool = 0;

        err = dpsw_ctrl_if_set_pools(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                     &dpsw_ctrl_if_pools_cfg);
        if (err) {
                dev_err(dev, "dpsw_ctrl_if_set_pools() failed\n");
                goto err_get_attr;
        }
        ethsw->bpid = dpbp_attrs.bpid;

        return 0;

err_get_attr:
        dpbp_disable(ethsw->mc_io, 0, dpbp_dev->mc_handle);
err_enable:
err_reset:
        dpbp_close(ethsw->mc_io, 0, dpbp_dev->mc_handle);
err_open:
        fsl_mc_object_free(dpbp_dev);
        return err;
}

static void dpaa2_switch_free_dpbp(struct ethsw_core *ethsw)
{
        dpbp_disable(ethsw->mc_io, 0, ethsw->dpbp_dev->mc_handle);
        dpbp_close(ethsw->mc_io, 0, ethsw->dpbp_dev->mc_handle);
        fsl_mc_object_free(ethsw->dpbp_dev);
}

static int dpaa2_switch_alloc_rings(struct ethsw_core *ethsw)
{
        int i;

        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++) {
                ethsw->fq[i].store =
                        dpaa2_io_store_create(DPAA2_SWITCH_STORE_SIZE,
                                              ethsw->dev);
                if (!ethsw->fq[i].store) {
                        dev_err(ethsw->dev, "dpaa2_io_store_create failed\n");
                        while (--i >= 0)
                                dpaa2_io_store_destroy(ethsw->fq[i].store);
                        return -ENOMEM;
                }
        }

        return 0;
}

static void dpaa2_switch_destroy_rings(struct ethsw_core *ethsw)
{
        int i;

        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++)
                dpaa2_io_store_destroy(ethsw->fq[i].store);
}

static int dpaa2_switch_pull_fq(struct dpaa2_switch_fq *fq)
{
        int err, retries = 0;

        /* Try to pull from the FQ while the portal is busy and we didn't hit
         * the maximum number fo retries
         */
        do {
                err = dpaa2_io_service_pull_fq(NULL, fq->fqid, fq->store);
                cpu_relax();
        } while (err == -EBUSY && retries++ < DPAA2_SWITCH_SWP_BUSY_RETRIES);

        if (unlikely(err))
                dev_err(fq->ethsw->dev, "dpaa2_io_service_pull err %d", err);

        return err;
}

/* Consume all frames pull-dequeued into the store */
static int dpaa2_switch_store_consume(struct dpaa2_switch_fq *fq)
{
        struct ethsw_core *ethsw = fq->ethsw;
        int cleaned = 0, is_last;
        struct dpaa2_dq *dq;
        int retries = 0;

        do {
                /* Get the next available FD from the store */
                dq = dpaa2_io_store_next(fq->store, &is_last);
                if (unlikely(!dq)) {
                        if (retries++ >= DPAA2_SWITCH_SWP_BUSY_RETRIES) {
                                dev_err_once(ethsw->dev,
                                             "No valid dequeue response\n");
                                return -ETIMEDOUT;
                        }
                        continue;
                }

                if (fq->type == DPSW_QUEUE_RX)
                        dpaa2_switch_rx(fq, dpaa2_dq_fd(dq));
                else
                        dpaa2_switch_tx_conf(fq, dpaa2_dq_fd(dq));
                cleaned++;

        } while (!is_last);

        return cleaned;
}

/* NAPI poll routine */
static int dpaa2_switch_poll(struct napi_struct *napi, int budget)
{
        int err, cleaned = 0, store_cleaned, work_done;
        struct dpaa2_switch_fq *fq;
        int retries = 0;

        fq = container_of(napi, struct dpaa2_switch_fq, napi);

        do {
                err = dpaa2_switch_pull_fq(fq);
                if (unlikely(err))
                        break;

                /* Refill pool if appropriate */
                dpaa2_switch_refill_bp(fq->ethsw);

                store_cleaned = dpaa2_switch_store_consume(fq);
                cleaned += store_cleaned;

                if (cleaned >= budget) {
                        work_done = budget;
                        goto out;
                }

        } while (store_cleaned);

        /* We didn't consume the entire budget, so finish napi and re-enable
         * data availability notifications
         */
        napi_complete_done(napi, cleaned);
        do {
                err = dpaa2_io_service_rearm(NULL, &fq->nctx);
                cpu_relax();
        } while (err == -EBUSY && retries++ < DPAA2_SWITCH_SWP_BUSY_RETRIES);

        work_done = max(cleaned, 1);
out:

        return work_done;
}

static void dpaa2_switch_fqdan_cb(struct dpaa2_io_notification_ctx *nctx)
{
        struct dpaa2_switch_fq *fq;

        fq = container_of(nctx, struct dpaa2_switch_fq, nctx);

        napi_schedule(&fq->napi);
}

static int dpaa2_switch_setup_dpio(struct ethsw_core *ethsw)
{
        struct dpsw_ctrl_if_queue_cfg queue_cfg;
        struct dpaa2_io_notification_ctx *nctx;
        int err, i, j;

        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++) {
                nctx = &ethsw->fq[i].nctx;

                /* Register a new software context for the FQID.
                 * By using NULL as the first parameter, we specify that we do
                 * not care on which cpu are interrupts received for this queue
                 */
                nctx->is_cdan = 0;
                nctx->id = ethsw->fq[i].fqid;
                nctx->desired_cpu = DPAA2_IO_ANY_CPU;
                nctx->cb = dpaa2_switch_fqdan_cb;
                err = dpaa2_io_service_register(NULL, nctx, ethsw->dev);
                if (err) {
                        err = -EPROBE_DEFER;
                        goto err_register;
                }

                queue_cfg.options = DPSW_CTRL_IF_QUEUE_OPT_DEST |
                                    DPSW_CTRL_IF_QUEUE_OPT_USER_CTX;
                queue_cfg.dest_cfg.dest_type = DPSW_CTRL_IF_DEST_DPIO;
                queue_cfg.dest_cfg.dest_id = nctx->dpio_id;
                queue_cfg.dest_cfg.priority = 0;
                queue_cfg.user_ctx = nctx->qman64;

                err = dpsw_ctrl_if_set_queue(ethsw->mc_io, 0,
                                             ethsw->dpsw_handle,
                                             ethsw->fq[i].type,
                                             &queue_cfg);
                if (err)
                        goto err_set_queue;
        }

        return 0;

err_set_queue:
        dpaa2_io_service_deregister(NULL, nctx, ethsw->dev);
err_register:
        for (j = 0; j < i; j++)
                dpaa2_io_service_deregister(NULL, &ethsw->fq[j].nctx,
                                            ethsw->dev);

        return err;
}

static void dpaa2_switch_free_dpio(struct ethsw_core *ethsw)
{
        int i;

        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++)
                dpaa2_io_service_deregister(NULL, &ethsw->fq[i].nctx,
                                            ethsw->dev);
}

static int dpaa2_switch_ctrl_if_setup(struct ethsw_core *ethsw)
{
        int err;

        /* setup FQs for Rx and Tx Conf */
        err = dpaa2_switch_setup_fqs(ethsw);
        if (err)
                return err;

        /* setup the buffer pool needed on the Rx path */
        err = dpaa2_switch_setup_dpbp(ethsw);
        if (err)
                return err;

        err = dpaa2_switch_alloc_rings(ethsw);
        if (err)
                goto err_free_dpbp;

        err = dpaa2_switch_setup_dpio(ethsw);
        if (err)
                goto err_destroy_rings;

        err = dpaa2_switch_seed_bp(ethsw);
        if (err)
                goto err_deregister_dpio;

        err = dpsw_ctrl_if_enable(ethsw->mc_io, 0, ethsw->dpsw_handle);
        if (err) {
                dev_err(ethsw->dev, "dpsw_ctrl_if_enable err %d\n", err);
                goto err_drain_dpbp;
        }

        return 0;

err_drain_dpbp:
        dpaa2_switch_drain_bp(ethsw);
err_deregister_dpio:
        dpaa2_switch_free_dpio(ethsw);
err_destroy_rings:
        dpaa2_switch_destroy_rings(ethsw);
err_free_dpbp:
        dpaa2_switch_free_dpbp(ethsw);

        return err;
}

static void dpaa2_switch_remove_port(struct ethsw_core *ethsw,
                                     u16 port_idx)
{
        struct ethsw_port_priv *port_priv = ethsw->ports[port_idx];

        dpaa2_switch_port_disconnect_mac(port_priv);
        free_netdev(port_priv->netdev);
        ethsw->ports[port_idx] = NULL;
}

static int dpaa2_switch_init(struct fsl_mc_device *sw_dev)
{
        struct device *dev = &sw_dev->dev;
        struct ethsw_core *ethsw = dev_get_drvdata(dev);
        struct dpsw_vlan_if_cfg vcfg = {0};
        struct dpsw_tci_cfg tci_cfg = {0};
        struct dpsw_stp_cfg stp_cfg;
        int err;
        u16 i;

        ethsw->dev_id = sw_dev->obj_desc.id;

        err = dpsw_open(ethsw->mc_io, 0, ethsw->dev_id, &ethsw->dpsw_handle);
        if (err) {
                dev_err(dev, "dpsw_open err %d\n", err);
                return err;
        }

        err = dpsw_get_attributes(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                  &ethsw->sw_attr);
        if (err) {
                dev_err(dev, "dpsw_get_attributes err %d\n", err);
                goto err_close;
        }

        if (!ethsw->sw_attr.num_ifs) {
                dev_err(dev, "DPSW device has no interfaces\n");
                err = -ENODEV;
                goto err_close;
        }

        if (ethsw->sw_attr.num_ifs >= DPSW_MAX_IF) {
                dev_err(dev, "DPSW num_ifs %u exceeds max %u\n",
                        ethsw->sw_attr.num_ifs, DPSW_MAX_IF);
                err = -EINVAL;
                goto err_close;
        }

        err = dpsw_get_api_version(ethsw->mc_io, 0,
                                   &ethsw->major,
                                   &ethsw->minor);
        if (err) {
                dev_err(dev, "dpsw_get_api_version err %d\n", err);
                goto err_close;
        }

        /* Minimum supported DPSW version check */
        if (ethsw->major < DPSW_MIN_VER_MAJOR ||
            (ethsw->major == DPSW_MIN_VER_MAJOR &&
             ethsw->minor < DPSW_MIN_VER_MINOR)) {
                dev_err(dev, "DPSW version %d:%d not supported. Use firmware 10.28.0 or greater.\n",
                        ethsw->major, ethsw->minor);
                err = -EOPNOTSUPP;
                goto err_close;
        }

        if (!dpaa2_switch_supports_cpu_traffic(ethsw)) {
                err = -EOPNOTSUPP;
                goto err_close;
        }

        dpaa2_switch_detect_features(ethsw);

        err = dpsw_reset(ethsw->mc_io, 0, ethsw->dpsw_handle);
        if (err) {
                dev_err(dev, "dpsw_reset err %d\n", err);
                goto err_close;
        }

        stp_cfg.vlan_id = DEFAULT_VLAN_ID;
        stp_cfg.state = DPSW_STP_STATE_FORWARDING;

        for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
                err = dpsw_if_disable(ethsw->mc_io, 0, ethsw->dpsw_handle, i);
                if (err) {
                        dev_err(dev, "dpsw_if_disable err %d\n", err);
                        goto err_close;
                }

                err = dpsw_if_set_stp(ethsw->mc_io, 0, ethsw->dpsw_handle, i,
                                      &stp_cfg);
                if (err) {
                        dev_err(dev, "dpsw_if_set_stp err %d for port %d\n",
                                err, i);
                        goto err_close;
                }

                /* Switch starts with all ports configured to VLAN 1. Need to
                 * remove this setting to allow configuration at bridge join
                 */
                vcfg.num_ifs = 1;
                vcfg.if_id[0] = i;
                err = dpsw_vlan_remove_if_untagged(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                                   DEFAULT_VLAN_ID, &vcfg);
                if (err) {
                        dev_err(dev, "dpsw_vlan_remove_if_untagged err %d\n",
                                err);
                        goto err_close;
                }

                tci_cfg.vlan_id = 4095;
                err = dpsw_if_set_tci(ethsw->mc_io, 0, ethsw->dpsw_handle, i, &tci_cfg);
                if (err) {
                        dev_err(dev, "dpsw_if_set_tci err %d\n", err);
                        goto err_close;
                }

                err = dpsw_vlan_remove_if(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                          DEFAULT_VLAN_ID, &vcfg);
                if (err) {
                        dev_err(dev, "dpsw_vlan_remove_if err %d\n", err);
                        goto err_close;
                }
        }

        err = dpsw_vlan_remove(ethsw->mc_io, 0, ethsw->dpsw_handle, DEFAULT_VLAN_ID);
        if (err) {
                dev_err(dev, "dpsw_vlan_remove err %d\n", err);
                goto err_close;
        }

        ethsw->workqueue = alloc_ordered_workqueue("%s_%d_ordered",
                                                   WQ_MEM_RECLAIM, "ethsw",
                                                   ethsw->sw_attr.id);
        if (!ethsw->workqueue) {
                err = -ENOMEM;
                goto err_close;
        }

        err = dpsw_fdb_remove(ethsw->mc_io, 0, ethsw->dpsw_handle, 0);
        if (err)
                goto err_destroy_ordered_workqueue;

        err = dpaa2_switch_ctrl_if_setup(ethsw);
        if (err)
                goto err_destroy_ordered_workqueue;

        return 0;

err_destroy_ordered_workqueue:
        destroy_workqueue(ethsw->workqueue);

err_close:
        dpsw_close(ethsw->mc_io, 0, ethsw->dpsw_handle);
        return err;
}

/* Add an ACL to redirect frames with specific destination MAC address to
 * control interface
 */
static int dpaa2_switch_port_trap_mac_addr(struct ethsw_port_priv *port_priv,
                                           const char *mac)
{
        struct dpaa2_switch_acl_entry acl_entry = {0};

        /* Match on the destination MAC address */
        ether_addr_copy(acl_entry.key.match.l2_dest_mac, mac);
        eth_broadcast_addr(acl_entry.key.mask.l2_dest_mac);

        /* Trap to CPU */
        acl_entry.cfg.precedence = 0;
        acl_entry.cfg.result.action = DPSW_ACL_ACTION_REDIRECT_TO_CTRL_IF;

        return dpaa2_switch_acl_entry_add(port_priv->filter_block, &acl_entry);
}

static int dpaa2_switch_port_init(struct ethsw_port_priv *port_priv, u16 port)
{
        const char stpa[ETH_ALEN] = {0x01, 0x80, 0xc2, 0x00, 0x00, 0x00};
        struct switchdev_obj_port_vlan vlan = {
                .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
                .vid = DEFAULT_VLAN_ID,
                .flags = BRIDGE_VLAN_INFO_UNTAGGED | BRIDGE_VLAN_INFO_PVID,
        };
        struct net_device *netdev = port_priv->netdev;
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpaa2_switch_filter_block *filter_block;
        struct dpsw_fdb_cfg fdb_cfg = {0};
        struct dpsw_if_attr dpsw_if_attr;
        struct dpaa2_switch_fdb *fdb;
        struct dpsw_acl_cfg acl_cfg;
        u16 fdb_id, acl_tbl_id;
        int err;

        /* Get the Tx queue for this specific port */
        err = dpsw_if_get_attributes(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                     port_priv->idx, &dpsw_if_attr);
        if (err) {
                netdev_err(netdev, "dpsw_if_get_attributes err %d\n", err);
                return err;
        }
        port_priv->tx_qdid = dpsw_if_attr.qdid;

        /* Create a FDB table for this particular switch port */
        fdb_cfg.num_fdb_entries = ethsw->sw_attr.max_fdb_entries / ethsw->sw_attr.num_ifs;
        err = dpsw_fdb_add(ethsw->mc_io, 0, ethsw->dpsw_handle,
                           &fdb_id, &fdb_cfg);
        if (err) {
                netdev_err(netdev, "dpsw_fdb_add err %d\n", err);
                return err;
        }

        /* Find an unused dpaa2_switch_fdb structure and use it */
        fdb = dpaa2_switch_fdb_get_unused(ethsw);
        fdb->fdb_id = fdb_id;
        fdb->in_use = true;
        fdb->bridge_dev = NULL;
        port_priv->fdb = fdb;

        /* We need to add VLAN 1 as the PVID on this port until it is under a
         * bridge since the DPAA2 switch is not able to handle the traffic in a
         * VLAN unaware fashion
         */
        err = dpaa2_switch_port_vlans_add(netdev, &vlan);
        if (err)
                return err;

        /* Setup the egress flooding domains (broadcast, unknown unicast */
        err = dpaa2_switch_fdb_set_egress_flood(ethsw, port_priv->fdb->fdb_id);
        if (err)
                return err;

        /* Create an ACL table to be used by this switch port */
        acl_cfg.max_entries = DPAA2_ETHSW_PORT_MAX_ACL_ENTRIES;
        err = dpsw_acl_add(ethsw->mc_io, 0, ethsw->dpsw_handle,
                           &acl_tbl_id, &acl_cfg);
        if (err) {
                netdev_err(netdev, "dpsw_acl_add err %d\n", err);
                return err;
        }

        filter_block = dpaa2_switch_filter_block_get_unused(ethsw);
        filter_block->ethsw = ethsw;
        filter_block->acl_id = acl_tbl_id;
        filter_block->in_use = true;
        filter_block->num_acl_rules = 0;
        INIT_LIST_HEAD(&filter_block->acl_entries);
        INIT_LIST_HEAD(&filter_block->mirror_entries);

        err = dpaa2_switch_port_acl_tbl_bind(port_priv, filter_block);
        if (err)
                return err;

        err = dpaa2_switch_port_trap_mac_addr(port_priv, stpa);
        if (err)
                return err;

        return err;
}

static void dpaa2_switch_ctrl_if_teardown(struct ethsw_core *ethsw)
{
        dpsw_ctrl_if_disable(ethsw->mc_io, 0, ethsw->dpsw_handle);
        dpaa2_switch_free_dpio(ethsw);
        dpaa2_switch_destroy_rings(ethsw);
        dpaa2_switch_drain_bp(ethsw);
        dpaa2_switch_free_dpbp(ethsw);
}

static void dpaa2_switch_teardown(struct fsl_mc_device *sw_dev)
{
        struct device *dev = &sw_dev->dev;
        struct ethsw_core *ethsw = dev_get_drvdata(dev);
        int err;

        dpaa2_switch_ctrl_if_teardown(ethsw);

        destroy_workqueue(ethsw->workqueue);

        err = dpsw_close(ethsw->mc_io, 0, ethsw->dpsw_handle);
        if (err)
                dev_warn(dev, "dpsw_close err %d\n", err);
}

static void dpaa2_switch_remove(struct fsl_mc_device *sw_dev)
{
        struct ethsw_core *ethsw;
        struct device *dev;
        int i;

        dev = &sw_dev->dev;
        ethsw = dev_get_drvdata(dev);

        dpaa2_switch_teardown_irqs(sw_dev);

        dpsw_disable(ethsw->mc_io, 0, ethsw->dpsw_handle);

        /* Unregister all the netdevs so that they are brought down and the
         * shared NAPI instances gets disabled.
         */
        for (i = 0; i < ethsw->sw_attr.num_ifs; i++)
                unregister_netdev(ethsw->ports[i]->netdev);

        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++)
                netif_napi_del(&ethsw->fq[i].napi);

        for (i = 0; i < ethsw->sw_attr.num_ifs; i++)
                dpaa2_switch_remove_port(ethsw, i);

        kfree(ethsw->fdbs);
        kfree(ethsw->filter_blocks);
        kfree(ethsw->ports);

        dpaa2_switch_teardown(sw_dev);

        fsl_mc_portal_free(ethsw->mc_io);

        kfree(ethsw);

        dev_set_drvdata(dev, NULL);
}

static int dpaa2_switch_probe_port(struct ethsw_core *ethsw,
                                   u16 port_idx)
{
        struct ethsw_port_priv *port_priv;
        struct device *dev = ethsw->dev;
        struct net_device *port_netdev;
        int err;

        port_netdev = alloc_etherdev(sizeof(struct ethsw_port_priv));
        if (!port_netdev) {
                dev_err(dev, "alloc_etherdev error\n");
                return -ENOMEM;
        }

        port_priv = netdev_priv(port_netdev);
        port_priv->netdev = port_netdev;
        port_priv->ethsw_data = ethsw;

        mutex_init(&port_priv->mac_lock);

        port_priv->idx = port_idx;
        port_priv->stp_state = BR_STATE_FORWARDING;

        SET_NETDEV_DEV(port_netdev, dev);
        port_netdev->netdev_ops = &dpaa2_switch_port_ops;
        port_netdev->ethtool_ops = &dpaa2_switch_port_ethtool_ops;

        port_netdev->needed_headroom = DPAA2_SWITCH_NEEDED_HEADROOM;

        port_priv->bcast_flood = true;
        port_priv->ucast_flood = true;

        /* Set MTU limits */
        port_netdev->min_mtu = ETH_MIN_MTU;
        port_netdev->max_mtu = ETHSW_MAX_FRAME_LENGTH;

        /* Populate the private port structure so that later calls to
         * dpaa2_switch_port_init() can use it.
         */
        ethsw->ports[port_idx] = port_priv;

        /* The DPAA2 switch's ingress path depends on the VLAN table,
         * thus we are not able to disable VLAN filtering.
         */
        port_netdev->features = NETIF_F_HW_VLAN_CTAG_FILTER |
                                NETIF_F_HW_VLAN_STAG_FILTER |
                                NETIF_F_HW_TC;
        port_netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;

        err = dpaa2_switch_port_init(port_priv, port_idx);
        if (err)
                goto err_port_probe;

        err = dpaa2_switch_port_set_mac_addr(port_priv);
        if (err)
                goto err_port_probe;

        err = dpaa2_switch_port_set_learning(port_priv, false);
        if (err)
                goto err_port_probe;
        port_priv->learn_ena = false;

        err = dpaa2_switch_port_connect_mac(port_priv);
        if (err)
                goto err_port_probe;

        return 0;

err_port_probe:
        free_netdev(port_netdev);
        ethsw->ports[port_idx] = NULL;

        return err;
}

static int dpaa2_switch_probe(struct fsl_mc_device *sw_dev)
{
        struct device *dev = &sw_dev->dev;
        struct ethsw_core *ethsw;
        int i, err;

        /* Allocate switch core*/
        ethsw = kzalloc_obj(*ethsw);

        if (!ethsw)
                return -ENOMEM;

        ethsw->dev = dev;
        ethsw->iommu_domain = iommu_get_domain_for_dev(dev);
        dev_set_drvdata(dev, ethsw);

        err = fsl_mc_portal_allocate(sw_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
                                     &ethsw->mc_io);
        if (err) {
                if (err == -ENXIO)
                        err = -EPROBE_DEFER;
                else
                        dev_err(dev, "fsl_mc_portal_allocate err %d\n", err);
                goto err_free_drvdata;
        }

        err = dpaa2_switch_init(sw_dev);
        if (err)
                goto err_free_cmdport;

        ethsw->ports = kzalloc_objs(*ethsw->ports, ethsw->sw_attr.num_ifs);
        if (!(ethsw->ports)) {
                err = -ENOMEM;
                goto err_teardown;
        }

        ethsw->fdbs = kzalloc_objs(*ethsw->fdbs, ethsw->sw_attr.num_ifs);
        if (!ethsw->fdbs) {
                err = -ENOMEM;
                goto err_free_ports;
        }

        ethsw->filter_blocks = kzalloc_objs(*ethsw->filter_blocks,
                                            ethsw->sw_attr.num_ifs);
        if (!ethsw->filter_blocks) {
                err = -ENOMEM;
                goto err_free_fdbs;
        }

        for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
                err = dpaa2_switch_probe_port(ethsw, i);
                if (err)
                        goto err_free_netdev;
        }

        /* Add a NAPI instance for each of the Rx queues. The first port's
         * net_device will be associated with the instances since we do not have
         * different queues for each switch ports.
         */
        for (i = 0; i < DPAA2_SWITCH_RX_NUM_FQS; i++)
                netif_napi_add(ethsw->ports[0]->netdev, &ethsw->fq[i].napi,
                               dpaa2_switch_poll);

        /* Setup IRQs */
        err = dpaa2_switch_setup_irqs(sw_dev);
        if (err)
                goto err_stop;

        /* By convention, if the mirror port is equal to the number of switch
         * interfaces, then mirroring of any kind is disabled.
         */
        ethsw->mirror_port =  ethsw->sw_attr.num_ifs;

        /* Register the netdev only when the entire setup is done and the
         * switch port interfaces are ready to receive traffic
         */
        for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
                err = register_netdev(ethsw->ports[i]->netdev);
                if (err < 0) {
                        dev_err(dev, "register_netdev error %d\n", err);
                        goto err_unregister_ports;
                }
        }

        return 0;

err_unregister_ports:
        for (i--; i >= 0; i--)
                unregister_netdev(ethsw->ports[i]->netdev);
        dpaa2_switch_teardown_irqs(sw_dev);
err_stop:
        dpsw_disable(ethsw->mc_io, 0, ethsw->dpsw_handle);
err_free_netdev:
        for (i--; i >= 0; i--)
                dpaa2_switch_remove_port(ethsw, i);
        kfree(ethsw->filter_blocks);
err_free_fdbs:
        kfree(ethsw->fdbs);
err_free_ports:
        kfree(ethsw->ports);

err_teardown:
        dpaa2_switch_teardown(sw_dev);

err_free_cmdport:
        fsl_mc_portal_free(ethsw->mc_io);

err_free_drvdata:
        kfree(ethsw);
        dev_set_drvdata(dev, NULL);

        return err;
}

static const struct fsl_mc_device_id dpaa2_switch_match_id_table[] = {
        {
                .vendor = FSL_MC_VENDOR_FREESCALE,
                .obj_type = "dpsw",
        },
        { .vendor = 0x0 }
};
MODULE_DEVICE_TABLE(fslmc, dpaa2_switch_match_id_table);

static struct fsl_mc_driver dpaa2_switch_drv = {
        .driver = {
                .name = KBUILD_MODNAME,
        },
        .probe = dpaa2_switch_probe,
        .remove = dpaa2_switch_remove,
        .match_id_table = dpaa2_switch_match_id_table
};

static struct notifier_block dpaa2_switch_port_nb __read_mostly = {
        .notifier_call = dpaa2_switch_port_netdevice_event,
};

static struct notifier_block dpaa2_switch_port_switchdev_nb = {
        .notifier_call = dpaa2_switch_port_event,
};

static struct notifier_block dpaa2_switch_port_switchdev_blocking_nb = {
        .notifier_call = dpaa2_switch_port_blocking_event,
};

static int dpaa2_switch_register_notifiers(void)
{
        int err;

        err = register_netdevice_notifier(&dpaa2_switch_port_nb);
        if (err) {
                pr_err("dpaa2-switch: failed to register net_device notifier (%d)\n", err);
                return err;
        }

        err = register_switchdev_notifier(&dpaa2_switch_port_switchdev_nb);
        if (err) {
                pr_err("dpaa2-switch: failed to register switchdev notifier (%d)\n", err);
                goto err_switchdev_nb;
        }

        err = register_switchdev_blocking_notifier(&dpaa2_switch_port_switchdev_blocking_nb);
        if (err) {
                pr_err("dpaa2-switch: failed to register switchdev blocking notifier (%d)\n", err);
                goto err_switchdev_blocking_nb;
        }

        return 0;

err_switchdev_blocking_nb:
        unregister_switchdev_notifier(&dpaa2_switch_port_switchdev_nb);
err_switchdev_nb:
        unregister_netdevice_notifier(&dpaa2_switch_port_nb);

        return err;
}

static void dpaa2_switch_unregister_notifiers(void)
{
        int err;

        err = unregister_switchdev_blocking_notifier(&dpaa2_switch_port_switchdev_blocking_nb);
        if (err)
                pr_err("dpaa2-switch: failed to unregister switchdev blocking notifier (%d)\n",
                       err);

        err = unregister_switchdev_notifier(&dpaa2_switch_port_switchdev_nb);
        if (err)
                pr_err("dpaa2-switch: failed to unregister switchdev notifier (%d)\n", err);

        err = unregister_netdevice_notifier(&dpaa2_switch_port_nb);
        if (err)
                pr_err("dpaa2-switch: failed to unregister net_device notifier (%d)\n", err);
}

static int __init dpaa2_switch_driver_init(void)
{
        int err;

        err = fsl_mc_driver_register(&dpaa2_switch_drv);
        if (err)
                return err;

        err = dpaa2_switch_register_notifiers();
        if (err) {
                fsl_mc_driver_unregister(&dpaa2_switch_drv);
                return err;
        }

        return 0;
}

static void __exit dpaa2_switch_driver_exit(void)
{
        dpaa2_switch_unregister_notifiers();
        fsl_mc_driver_unregister(&dpaa2_switch_drv);
}

module_init(dpaa2_switch_driver_init);
module_exit(dpaa2_switch_driver_exit);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DPAA2 Ethernet Switch Driver");