// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Microsemi Ocelot Switch driver
 *
 * This contains glue logic between the switchdev driver operations and the
 * mscc_ocelot_switch_lib.
 *
 * Copyright (c) 2017, 2019 Microsemi Corporation
 * Copyright 2020-2021 NXP Semiconductors
 */

#include <linux/if_bridge.h>
#include <net/pkt_cls.h>
#include "ocelot.h"
#include "ocelot_vcap.h"

static struct ocelot *devlink_port_to_ocelot(struct devlink_port *dlp)
{
        return devlink_priv(dlp->devlink);
}

static int devlink_port_to_port(struct devlink_port *dlp)
{
        struct ocelot *ocelot = devlink_port_to_ocelot(dlp);

        return dlp - ocelot->devlink_ports;
}

static int ocelot_devlink_sb_pool_get(struct devlink *dl,
                                      unsigned int sb_index, u16 pool_index,
                                      struct devlink_sb_pool_info *pool_info)
{
        struct ocelot *ocelot = devlink_priv(dl);

        return ocelot_sb_pool_get(ocelot, sb_index, pool_index, pool_info);
}

static int ocelot_devlink_sb_pool_set(struct devlink *dl, unsigned int sb_index,
                                      u16 pool_index, u32 size,
                                      enum devlink_sb_threshold_type threshold_type,
                                      struct netlink_ext_ack *extack)
{
        struct ocelot *ocelot = devlink_priv(dl);

        return ocelot_sb_pool_set(ocelot, sb_index, pool_index, size,
                                  threshold_type, extack);
}

static int ocelot_devlink_sb_port_pool_get(struct devlink_port *dlp,
                                           unsigned int sb_index, u16 pool_index,
                                           u32 *p_threshold)
{
        struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
        int port = devlink_port_to_port(dlp);

        return ocelot_sb_port_pool_get(ocelot, port, sb_index, pool_index,
                                       p_threshold);
}

static int ocelot_devlink_sb_port_pool_set(struct devlink_port *dlp,
                                           unsigned int sb_index, u16 pool_index,
                                           u32 threshold,
                                           struct netlink_ext_ack *extack)
{
        struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
        int port = devlink_port_to_port(dlp);

        return ocelot_sb_port_pool_set(ocelot, port, sb_index, pool_index,
                                       threshold, extack);
}

static int
ocelot_devlink_sb_tc_pool_bind_get(struct devlink_port *dlp,
                                   unsigned int sb_index, u16 tc_index,
                                   enum devlink_sb_pool_type pool_type,
                                   u16 *p_pool_index, u32 *p_threshold)
{
        struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
        int port = devlink_port_to_port(dlp);

        return ocelot_sb_tc_pool_bind_get(ocelot, port, sb_index, tc_index,
                                          pool_type, p_pool_index,
                                          p_threshold);
}

static int
ocelot_devlink_sb_tc_pool_bind_set(struct devlink_port *dlp,
                                   unsigned int sb_index, u16 tc_index,
                                   enum devlink_sb_pool_type pool_type,
                                   u16 pool_index, u32 threshold,
                                   struct netlink_ext_ack *extack)
{
        struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
        int port = devlink_port_to_port(dlp);

        return ocelot_sb_tc_pool_bind_set(ocelot, port, sb_index, tc_index,
                                          pool_type, pool_index, threshold,
                                          extack);
}

static int ocelot_devlink_sb_occ_snapshot(struct devlink *dl,
                                          unsigned int sb_index)
{
        struct ocelot *ocelot = devlink_priv(dl);

        return ocelot_sb_occ_snapshot(ocelot, sb_index);
}

static int ocelot_devlink_sb_occ_max_clear(struct devlink *dl,
                                           unsigned int sb_index)
{
        struct ocelot *ocelot = devlink_priv(dl);

        return ocelot_sb_occ_max_clear(ocelot, sb_index);
}

static int ocelot_devlink_sb_occ_port_pool_get(struct devlink_port *dlp,
                                               unsigned int sb_index,
                                               u16 pool_index, u32 *p_cur,
                                               u32 *p_max)
{
        struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
        int port = devlink_port_to_port(dlp);

        return ocelot_sb_occ_port_pool_get(ocelot, port, sb_index, pool_index,
                                           p_cur, p_max);
}

static int
ocelot_devlink_sb_occ_tc_port_bind_get(struct devlink_port *dlp,
                                       unsigned int sb_index, u16 tc_index,
                                       enum devlink_sb_pool_type pool_type,
                                       u32 *p_cur, u32 *p_max)
{
        struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
        int port = devlink_port_to_port(dlp);

        return ocelot_sb_occ_tc_port_bind_get(ocelot, port, sb_index,
                                              tc_index, pool_type,
                                              p_cur, p_max);
}

const struct devlink_ops ocelot_devlink_ops = {
        .sb_pool_get                    = ocelot_devlink_sb_pool_get,
        .sb_pool_set                    = ocelot_devlink_sb_pool_set,
        .sb_port_pool_get               = ocelot_devlink_sb_port_pool_get,
        .sb_port_pool_set               = ocelot_devlink_sb_port_pool_set,
        .sb_tc_pool_bind_get            = ocelot_devlink_sb_tc_pool_bind_get,
        .sb_tc_pool_bind_set            = ocelot_devlink_sb_tc_pool_bind_set,
        .sb_occ_snapshot                = ocelot_devlink_sb_occ_snapshot,
        .sb_occ_max_clear               = ocelot_devlink_sb_occ_max_clear,
        .sb_occ_port_pool_get           = ocelot_devlink_sb_occ_port_pool_get,
        .sb_occ_tc_port_bind_get        = ocelot_devlink_sb_occ_tc_port_bind_get,
};

int ocelot_port_devlink_init(struct ocelot *ocelot, int port,
                             enum devlink_port_flavour flavour)
{
        struct devlink_port *dlp = &ocelot->devlink_ports[port];
        int id_len = sizeof(ocelot->base_mac);
        struct devlink *dl = ocelot->devlink;
        struct devlink_port_attrs attrs = {};

        memcpy(attrs.switch_id.id, &ocelot->base_mac, id_len);
        attrs.switch_id.id_len = id_len;
        attrs.phys.port_number = port;
        attrs.flavour = flavour;

        devlink_port_attrs_set(dlp, &attrs);

        return devlink_port_register(dl, dlp, port);
}

void ocelot_port_devlink_teardown(struct ocelot *ocelot, int port)
{
        struct devlink_port *dlp = &ocelot->devlink_ports[port];

        devlink_port_unregister(dlp);
}

static struct devlink_port *ocelot_get_devlink_port(struct net_device *dev)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        return &ocelot->devlink_ports[port];
}

int ocelot_setup_tc_cls_flower(struct ocelot_port_private *priv,
                               struct flow_cls_offload *f,
                               bool ingress)
{
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        if (!ingress)
                return -EOPNOTSUPP;

        switch (f->command) {
        case FLOW_CLS_REPLACE:
                return ocelot_cls_flower_replace(ocelot, port, f, ingress);
        case FLOW_CLS_DESTROY:
                return ocelot_cls_flower_destroy(ocelot, port, f, ingress);
        case FLOW_CLS_STATS:
                return ocelot_cls_flower_stats(ocelot, port, f, ingress);
        default:
                return -EOPNOTSUPP;
        }
}

static int ocelot_setup_tc_cls_matchall(struct ocelot_port_private *priv,
                                        struct tc_cls_matchall_offload *f,
                                        bool ingress)
{
        struct netlink_ext_ack *extack = f->common.extack;
        struct ocelot *ocelot = priv->port.ocelot;
        struct ocelot_policer pol = { 0 };
        struct flow_action_entry *action;
        int port = priv->chip_port;
        int err;

        if (!ingress) {
                NL_SET_ERR_MSG_MOD(extack, "Only ingress is supported");
                return -EOPNOTSUPP;
        }

        switch (f->command) {
        case TC_CLSMATCHALL_REPLACE:
                if (!flow_offload_has_one_action(&f->rule->action)) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Only one action is supported");
                        return -EOPNOTSUPP;
                }

                if (priv->tc.block_shared) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Rate limit is not supported on shared blocks");
                        return -EOPNOTSUPP;
                }

                action = &f->rule->action.entries[0];

                if (action->id != FLOW_ACTION_POLICE) {
                        NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
                        return -EOPNOTSUPP;
                }

                if (priv->tc.police_id && priv->tc.police_id != f->cookie) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Only one policer per port is supported");
                        return -EEXIST;
                }

                if (action->police.rate_pkt_ps) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "QoS offload not support packets per second");
                        return -EOPNOTSUPP;
                }

                pol.rate = (u32)div_u64(action->police.rate_bytes_ps, 1000) * 8;
                pol.burst = action->police.burst;

                err = ocelot_port_policer_add(ocelot, port, &pol);
                if (err) {
                        NL_SET_ERR_MSG_MOD(extack, "Could not add policer");
                        return err;
                }

                priv->tc.police_id = f->cookie;
                priv->tc.offload_cnt++;
                return 0;
        case TC_CLSMATCHALL_DESTROY:
                if (priv->tc.police_id != f->cookie)
                        return -ENOENT;

                err = ocelot_port_policer_del(ocelot, port);
                if (err) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Could not delete policer");
                        return err;
                }
                priv->tc.police_id = 0;
                priv->tc.offload_cnt--;
                return 0;
        case TC_CLSMATCHALL_STATS:
        default:
                return -EOPNOTSUPP;
        }
}

static int ocelot_setup_tc_block_cb(enum tc_setup_type type,
                                    void *type_data,
                                    void *cb_priv, bool ingress)
{
        struct ocelot_port_private *priv = cb_priv;

        if (!tc_cls_can_offload_and_chain0(priv->dev, type_data))
                return -EOPNOTSUPP;

        switch (type) {
        case TC_SETUP_CLSMATCHALL:
                return ocelot_setup_tc_cls_matchall(priv, type_data, ingress);
        case TC_SETUP_CLSFLOWER:
                return ocelot_setup_tc_cls_flower(priv, type_data, ingress);
        default:
                return -EOPNOTSUPP;
        }
}

static int ocelot_setup_tc_block_cb_ig(enum tc_setup_type type,
                                       void *type_data,
                                       void *cb_priv)
{
        return ocelot_setup_tc_block_cb(type, type_data,
                                        cb_priv, true);
}

static int ocelot_setup_tc_block_cb_eg(enum tc_setup_type type,
                                       void *type_data,
                                       void *cb_priv)
{
        return ocelot_setup_tc_block_cb(type, type_data,
                                        cb_priv, false);
}

static LIST_HEAD(ocelot_block_cb_list);

static int ocelot_setup_tc_block(struct ocelot_port_private *priv,
                                 struct flow_block_offload *f)
{
        struct flow_block_cb *block_cb;
        flow_setup_cb_t *cb;

        if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) {
                cb = ocelot_setup_tc_block_cb_ig;
                priv->tc.block_shared = f->block_shared;
        } else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) {
                cb = ocelot_setup_tc_block_cb_eg;
        } else {
                return -EOPNOTSUPP;
        }

        f->driver_block_list = &ocelot_block_cb_list;

        switch (f->command) {
        case FLOW_BLOCK_BIND:
                if (flow_block_cb_is_busy(cb, priv, &ocelot_block_cb_list))
                        return -EBUSY;

                block_cb = flow_block_cb_alloc(cb, priv, priv, NULL);
                if (IS_ERR(block_cb))
                        return PTR_ERR(block_cb);

                flow_block_cb_add(block_cb, f);
                list_add_tail(&block_cb->driver_list, f->driver_block_list);
                return 0;
        case FLOW_BLOCK_UNBIND:
                block_cb = flow_block_cb_lookup(f->block, cb, priv);
                if (!block_cb)
                        return -ENOENT;

                flow_block_cb_remove(block_cb, f);
                list_del(&block_cb->driver_list);
                return 0;
        default:
                return -EOPNOTSUPP;
        }
}

static int ocelot_setup_tc(struct net_device *dev, enum tc_setup_type type,
                           void *type_data)
{
        struct ocelot_port_private *priv = netdev_priv(dev);

        switch (type) {
        case TC_SETUP_BLOCK:
                return ocelot_setup_tc_block(priv, type_data);
        default:
                return -EOPNOTSUPP;
        }
        return 0;
}

static void ocelot_port_adjust_link(struct net_device *dev)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        ocelot_adjust_link(ocelot, port, dev->phydev);
}

static int ocelot_vlan_vid_prepare(struct net_device *dev, u16 vid, bool pvid,
                                   bool untagged)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        return ocelot_vlan_prepare(ocelot, port, vid, pvid, untagged);
}

static int ocelot_vlan_vid_add(struct net_device *dev, u16 vid, bool pvid,
                               bool untagged)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;
        int ret;

        ret = ocelot_vlan_add(ocelot, port, vid, pvid, untagged);
        if (ret)
                return ret;

        /* Add the port MAC address to with the right VLAN information */
        ocelot_mact_learn(ocelot, PGID_CPU, dev->dev_addr, vid,
                          ENTRYTYPE_LOCKED);

        return 0;
}

static int ocelot_vlan_vid_del(struct net_device *dev, u16 vid)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;
        int ret;

        /* 8021q removes VID 0 on module unload for all interfaces
         * with VLAN filtering feature. We need to keep it to receive
         * untagged traffic.
         */
        if (vid == 0)
                return 0;

        ret = ocelot_vlan_del(ocelot, port, vid);
        if (ret)
                return ret;

        /* Del the port MAC address to with the right VLAN information */
        ocelot_mact_forget(ocelot, dev->dev_addr, vid);

        return 0;
}

static int ocelot_port_open(struct net_device *dev)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;
        int err;

        if (priv->serdes) {
                err = phy_set_mode_ext(priv->serdes, PHY_MODE_ETHERNET,
                                       ocelot_port->phy_mode);
                if (err) {
                        netdev_err(dev, "Could not set mode of SerDes\n");
                        return err;
                }
        }

        err = phy_connect_direct(dev, priv->phy, &ocelot_port_adjust_link,
                                 ocelot_port->phy_mode);
        if (err) {
                netdev_err(dev, "Could not attach to PHY\n");
                return err;
        }

        dev->phydev = priv->phy;

        phy_attached_info(priv->phy);
        phy_start(priv->phy);

        ocelot_port_enable(ocelot, port, priv->phy);

        return 0;
}

static int ocelot_port_stop(struct net_device *dev)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        phy_disconnect(priv->phy);

        dev->phydev = NULL;

        ocelot_port_disable(ocelot, port);

        return 0;
}

static netdev_tx_t ocelot_port_xmit(struct sk_buff *skb, struct net_device *dev)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;
        u32 rew_op = 0;

        if (!ocelot_can_inject(ocelot, 0))
                return NETDEV_TX_BUSY;

        /* Check if timestamping is needed */
        if (ocelot->ptp && (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
                struct sk_buff *clone = NULL;

                if (ocelot_port_txtstamp_request(ocelot, port, skb, &clone)) {
                        kfree_skb(skb);
                        return NETDEV_TX_OK;
                }

                if (clone)
                        OCELOT_SKB_CB(skb)->clone = clone;

                rew_op = ocelot_ptp_rew_op(skb);
        }

        ocelot_port_inject_frame(ocelot, port, 0, rew_op, skb);

        kfree_skb(skb);

        return NETDEV_TX_OK;
}

enum ocelot_action_type {
        OCELOT_MACT_LEARN,
        OCELOT_MACT_FORGET,
};

struct ocelot_mact_work_ctx {
        struct work_struct work;
        struct ocelot *ocelot;
        enum ocelot_action_type type;
        union {
                /* OCELOT_MACT_LEARN */
                struct {
                        unsigned char addr[ETH_ALEN];
                        u16 vid;
                        enum macaccess_entry_type entry_type;
                        int pgid;
                } learn;
                /* OCELOT_MACT_FORGET */
                struct {
                        unsigned char addr[ETH_ALEN];
                        u16 vid;
                } forget;
        };
};

#define ocelot_work_to_ctx(x) \
        container_of((x), struct ocelot_mact_work_ctx, work)

static void ocelot_mact_work(struct work_struct *work)
{
        struct ocelot_mact_work_ctx *w = ocelot_work_to_ctx(work);
        struct ocelot *ocelot = w->ocelot;

        switch (w->type) {
        case OCELOT_MACT_LEARN:
                ocelot_mact_learn(ocelot, w->learn.pgid, w->learn.addr,
                                  w->learn.vid, w->learn.entry_type);
                break;
        case OCELOT_MACT_FORGET:
                ocelot_mact_forget(ocelot, w->forget.addr, w->forget.vid);
                break;
        default:
                break;
        }

        kfree(w);
}

static int ocelot_enqueue_mact_action(struct ocelot *ocelot,
                                      const struct ocelot_mact_work_ctx *ctx)
{
        struct ocelot_mact_work_ctx *w = kmemdup(ctx, sizeof(*w), GFP_ATOMIC);

        if (!w)
                return -ENOMEM;

        w->ocelot = ocelot;
        INIT_WORK(&w->work, ocelot_mact_work);
        queue_work(ocelot->owq, &w->work);

        return 0;
}

static int ocelot_mc_unsync(struct net_device *dev, const unsigned char *addr)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        struct ocelot_mact_work_ctx w;

        ether_addr_copy(w.forget.addr, addr);
        w.forget.vid = ocelot_port->pvid_vlan.vid;
        w.type = OCELOT_MACT_FORGET;

        return ocelot_enqueue_mact_action(ocelot, &w);
}

static int ocelot_mc_sync(struct net_device *dev, const unsigned char *addr)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        struct ocelot_mact_work_ctx w;

        ether_addr_copy(w.learn.addr, addr);
        w.learn.vid = ocelot_port->pvid_vlan.vid;
        w.learn.pgid = PGID_CPU;
        w.learn.entry_type = ENTRYTYPE_LOCKED;
        w.type = OCELOT_MACT_LEARN;

        return ocelot_enqueue_mact_action(ocelot, &w);
}

static void ocelot_set_rx_mode(struct net_device *dev)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        u32 val;
        int i;

        /* This doesn't handle promiscuous mode because the bridge core is
         * setting IFF_PROMISC on all slave interfaces and all frames would be
         * forwarded to the CPU port.
         */
        val = GENMASK(ocelot->num_phys_ports - 1, 0);
        for_each_nonreserved_multicast_dest_pgid(ocelot, i)
                ocelot_write_rix(ocelot, val, ANA_PGID_PGID, i);

        __dev_mc_sync(dev, ocelot_mc_sync, ocelot_mc_unsync);
}

static int ocelot_port_set_mac_address(struct net_device *dev, void *p)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        const struct sockaddr *addr = p;

        /* Learn the new net device MAC address in the mac table. */
        ocelot_mact_learn(ocelot, PGID_CPU, addr->sa_data,
                          ocelot_port->pvid_vlan.vid, ENTRYTYPE_LOCKED);
        /* Then forget the previous one. */
        ocelot_mact_forget(ocelot, dev->dev_addr, ocelot_port->pvid_vlan.vid);

        ether_addr_copy(dev->dev_addr, addr->sa_data);
        return 0;
}

static void ocelot_get_stats64(struct net_device *dev,
                               struct rtnl_link_stats64 *stats)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        /* Configure the port to read the stats from */
        ocelot_write(ocelot, SYS_STAT_CFG_STAT_VIEW(port),
                     SYS_STAT_CFG);

        /* Get Rx stats */
        stats->rx_bytes = ocelot_read(ocelot, SYS_COUNT_RX_OCTETS);
        stats->rx_packets = ocelot_read(ocelot, SYS_COUNT_RX_SHORTS) +
                            ocelot_read(ocelot, SYS_COUNT_RX_FRAGMENTS) +
                            ocelot_read(ocelot, SYS_COUNT_RX_JABBERS) +
                            ocelot_read(ocelot, SYS_COUNT_RX_LONGS) +
                            ocelot_read(ocelot, SYS_COUNT_RX_64) +
                            ocelot_read(ocelot, SYS_COUNT_RX_65_127) +
                            ocelot_read(ocelot, SYS_COUNT_RX_128_255) +
                            ocelot_read(ocelot, SYS_COUNT_RX_256_1023) +
                            ocelot_read(ocelot, SYS_COUNT_RX_1024_1526) +
                            ocelot_read(ocelot, SYS_COUNT_RX_1527_MAX);
        stats->multicast = ocelot_read(ocelot, SYS_COUNT_RX_MULTICAST);
        stats->rx_dropped = dev->stats.rx_dropped;

        /* Get Tx stats */
        stats->tx_bytes = ocelot_read(ocelot, SYS_COUNT_TX_OCTETS);
        stats->tx_packets = ocelot_read(ocelot, SYS_COUNT_TX_64) +
                            ocelot_read(ocelot, SYS_COUNT_TX_65_127) +
                            ocelot_read(ocelot, SYS_COUNT_TX_128_511) +
                            ocelot_read(ocelot, SYS_COUNT_TX_512_1023) +
                            ocelot_read(ocelot, SYS_COUNT_TX_1024_1526) +
                            ocelot_read(ocelot, SYS_COUNT_TX_1527_MAX);
        stats->tx_dropped = ocelot_read(ocelot, SYS_COUNT_TX_DROPS) +
                            ocelot_read(ocelot, SYS_COUNT_TX_AGING);
        stats->collisions = ocelot_read(ocelot, SYS_COUNT_TX_COLLISION);
}

static int ocelot_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                               struct net_device *dev,
                               const unsigned char *addr,
                               u16 vid, u16 flags,
                               struct netlink_ext_ack *extack)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        return ocelot_fdb_add(ocelot, port, addr, vid);
}

static int ocelot_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
                               struct net_device *dev,
                               const unsigned char *addr, u16 vid)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        return ocelot_fdb_del(ocelot, port, addr, vid);
}

static int ocelot_port_fdb_dump(struct sk_buff *skb,
                                struct netlink_callback *cb,
                                struct net_device *dev,
                                struct net_device *filter_dev, int *idx)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        struct ocelot_dump_ctx dump = {
                .dev = dev,
                .skb = skb,
                .cb = cb,
                .idx = *idx,
        };
        int port = priv->chip_port;
        int ret;

        ret = ocelot_fdb_dump(ocelot, port, ocelot_port_fdb_do_dump, &dump);

        *idx = dump.idx;

        return ret;
}

static int ocelot_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
                                  u16 vid)
{
        return ocelot_vlan_vid_add(dev, vid, false, false);
}

static int ocelot_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
                                   u16 vid)
{
        return ocelot_vlan_vid_del(dev, vid);
}

static void ocelot_vlan_mode(struct ocelot *ocelot, int port,
                             netdev_features_t features)
{
        u32 val;

        /* Filtering */
        val = ocelot_read(ocelot, ANA_VLANMASK);
        if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
                val |= BIT(port);
        else
                val &= ~BIT(port);
        ocelot_write(ocelot, val, ANA_VLANMASK);
}

static int ocelot_set_features(struct net_device *dev,
                               netdev_features_t features)
{
        netdev_features_t changed = dev->features ^ features;
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC) &&
            priv->tc.offload_cnt) {
                netdev_err(dev,
                           "Cannot disable HW TC offload while offloads active\n");
                return -EBUSY;
        }

        if (changed & NETIF_F_HW_VLAN_CTAG_FILTER)
                ocelot_vlan_mode(ocelot, port, features);

        return 0;
}

static int ocelot_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        /* If the attached PHY device isn't capable of timestamping operations,
         * use our own (when possible).
         */
        if (!phy_has_hwtstamp(dev->phydev) && ocelot->ptp) {
                switch (cmd) {
                case SIOCSHWTSTAMP:
                        return ocelot_hwstamp_set(ocelot, port, ifr);
                case SIOCGHWTSTAMP:
                        return ocelot_hwstamp_get(ocelot, port, ifr);
                }
        }

        return phy_mii_ioctl(dev->phydev, ifr, cmd);
}

static const struct net_device_ops ocelot_port_netdev_ops = {
        .ndo_open                       = ocelot_port_open,
        .ndo_stop                       = ocelot_port_stop,
        .ndo_start_xmit                 = ocelot_port_xmit,
        .ndo_set_rx_mode                = ocelot_set_rx_mode,
        .ndo_set_mac_address            = ocelot_port_set_mac_address,
        .ndo_get_stats64                = ocelot_get_stats64,
        .ndo_fdb_add                    = ocelot_port_fdb_add,
        .ndo_fdb_del                    = ocelot_port_fdb_del,
        .ndo_fdb_dump                   = ocelot_port_fdb_dump,
        .ndo_vlan_rx_add_vid            = ocelot_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid           = ocelot_vlan_rx_kill_vid,
        .ndo_set_features               = ocelot_set_features,
        .ndo_setup_tc                   = ocelot_setup_tc,
        .ndo_do_ioctl                   = ocelot_ioctl,
        .ndo_get_devlink_port           = ocelot_get_devlink_port,
};

struct net_device *ocelot_port_to_netdev(struct ocelot *ocelot, int port)
{
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        struct ocelot_port_private *priv;

        if (!ocelot_port)
                return NULL;

        priv = container_of(ocelot_port, struct ocelot_port_private, port);

        return priv->dev;
}

/* Checks if the net_device instance given to us originates from our driver */
static bool ocelot_netdevice_dev_check(const struct net_device *dev)
{
        return dev->netdev_ops == &ocelot_port_netdev_ops;
}

int ocelot_netdev_to_port(struct net_device *dev)
{
        struct ocelot_port_private *priv;

        if (!dev || !ocelot_netdevice_dev_check(dev))
                return -EINVAL;

        priv = netdev_priv(dev);

        return priv->chip_port;
}

static void ocelot_port_get_strings(struct net_device *netdev, u32 sset,
                                    u8 *data)
{
        struct ocelot_port_private *priv = netdev_priv(netdev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        ocelot_get_strings(ocelot, port, sset, data);
}

static void ocelot_port_get_ethtool_stats(struct net_device *dev,
                                          struct ethtool_stats *stats,
                                          u64 *data)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        ocelot_get_ethtool_stats(ocelot, port, data);
}

static int ocelot_port_get_sset_count(struct net_device *dev, int sset)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        return ocelot_get_sset_count(ocelot, port, sset);
}

static int ocelot_port_get_ts_info(struct net_device *dev,
                                   struct ethtool_ts_info *info)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;

        if (!ocelot->ptp)
                return ethtool_op_get_ts_info(dev, info);

        return ocelot_get_ts_info(ocelot, port, info);
}

static const struct ethtool_ops ocelot_ethtool_ops = {
        .get_strings            = ocelot_port_get_strings,
        .get_ethtool_stats      = ocelot_port_get_ethtool_stats,
        .get_sset_count         = ocelot_port_get_sset_count,
        .get_link_ksettings     = phy_ethtool_get_link_ksettings,
        .set_link_ksettings     = phy_ethtool_set_link_ksettings,
        .get_ts_info            = ocelot_port_get_ts_info,
};

static void ocelot_port_attr_stp_state_set(struct ocelot *ocelot, int port,
                                           u8 state)
{
        ocelot_bridge_stp_state_set(ocelot, port, state);
}

static void ocelot_port_attr_ageing_set(struct ocelot *ocelot, int port,
                                        unsigned long ageing_clock_t)
{
        unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
        u32 ageing_time = jiffies_to_msecs(ageing_jiffies);

        ocelot_set_ageing_time(ocelot, ageing_time);
}

static void ocelot_port_attr_mc_set(struct ocelot *ocelot, int port, bool mc)
{
        u32 cpu_fwd_mcast = ANA_PORT_CPU_FWD_CFG_CPU_IGMP_REDIR_ENA |
                            ANA_PORT_CPU_FWD_CFG_CPU_MLD_REDIR_ENA |
                            ANA_PORT_CPU_FWD_CFG_CPU_IPMC_CTRL_COPY_ENA;
        u32 val = 0;

        if (mc)
                val = cpu_fwd_mcast;

        ocelot_rmw_gix(ocelot, val, cpu_fwd_mcast,
                       ANA_PORT_CPU_FWD_CFG, port);
}

static int ocelot_port_attr_set(struct net_device *dev,
                                const struct switchdev_attr *attr,
                                struct netlink_ext_ack *extack)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot *ocelot = priv->port.ocelot;
        int port = priv->chip_port;
        int err = 0;

        switch (attr->id) {
        case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
                ocelot_port_attr_stp_state_set(ocelot, port, attr->u.stp_state);
                break;
        case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
                ocelot_port_attr_ageing_set(ocelot, port, attr->u.ageing_time);
                break;
        case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
                ocelot_port_vlan_filtering(ocelot, port, attr->u.vlan_filtering);
                break;
        case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
                ocelot_port_attr_mc_set(ocelot, port, !attr->u.mc_disabled);
                break;
        case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
                err = ocelot_port_pre_bridge_flags(ocelot, port,
                                                   attr->u.brport_flags);
                break;
        case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
                ocelot_port_bridge_flags(ocelot, port, attr->u.brport_flags);
                break;
        default:
                err = -EOPNOTSUPP;
                break;
        }

        return err;
}

static int ocelot_port_obj_add_vlan(struct net_device *dev,
                                    const struct switchdev_obj_port_vlan *vlan)
{
        bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
        bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
        int ret;

        ret = ocelot_vlan_vid_prepare(dev, vlan->vid, pvid, untagged);
        if (ret)
                return ret;

        return ocelot_vlan_vid_add(dev, vlan->vid, pvid, untagged);
}

static int ocelot_port_obj_add_mdb(struct net_device *dev,
                                   const struct switchdev_obj_port_mdb *mdb)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        return ocelot_port_mdb_add(ocelot, port, mdb);
}

static int ocelot_port_obj_del_mdb(struct net_device *dev,
                                   const struct switchdev_obj_port_mdb *mdb)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        return ocelot_port_mdb_del(ocelot, port, mdb);
}

static int ocelot_port_obj_mrp_add(struct net_device *dev,
                                   const struct switchdev_obj_mrp *mrp)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        return ocelot_mrp_add(ocelot, port, mrp);
}

static int ocelot_port_obj_mrp_del(struct net_device *dev,
                                   const struct switchdev_obj_mrp *mrp)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        return ocelot_mrp_del(ocelot, port, mrp);
}

static int
ocelot_port_obj_mrp_add_ring_role(struct net_device *dev,
                                  const struct switchdev_obj_ring_role_mrp *mrp)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        return ocelot_mrp_add_ring_role(ocelot, port, mrp);
}

static int
ocelot_port_obj_mrp_del_ring_role(struct net_device *dev,
                                  const struct switchdev_obj_ring_role_mrp *mrp)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        return ocelot_mrp_del_ring_role(ocelot, port, mrp);
}

static int ocelot_port_obj_add(struct net_device *dev,
                               const struct switchdev_obj *obj,
                               struct netlink_ext_ack *extack)
{
        int ret = 0;

        switch (obj->id) {
        case SWITCHDEV_OBJ_ID_PORT_VLAN:
                ret = ocelot_port_obj_add_vlan(dev,
                                               SWITCHDEV_OBJ_PORT_VLAN(obj));
                break;
        case SWITCHDEV_OBJ_ID_PORT_MDB:
                ret = ocelot_port_obj_add_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
                break;
        case SWITCHDEV_OBJ_ID_MRP:
                ret = ocelot_port_obj_mrp_add(dev, SWITCHDEV_OBJ_MRP(obj));
                break;
        case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
                ret = ocelot_port_obj_mrp_add_ring_role(dev,
                                                        SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
                break;
        default:
                return -EOPNOTSUPP;
        }

        return ret;
}

static int ocelot_port_obj_del(struct net_device *dev,
                               const struct switchdev_obj *obj)
{
        int ret = 0;

        switch (obj->id) {
        case SWITCHDEV_OBJ_ID_PORT_VLAN:
                ret = ocelot_vlan_vid_del(dev,
                                          SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
                break;
        case SWITCHDEV_OBJ_ID_PORT_MDB:
                ret = ocelot_port_obj_del_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
                break;
        case SWITCHDEV_OBJ_ID_MRP:
                ret = ocelot_port_obj_mrp_del(dev, SWITCHDEV_OBJ_MRP(obj));
                break;
        case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
                ret = ocelot_port_obj_mrp_del_ring_role(dev,
                                                        SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
                break;
        default:
                return -EOPNOTSUPP;
        }

        return ret;
}

static void ocelot_inherit_brport_flags(struct ocelot *ocelot, int port,
                                        struct net_device *brport_dev)
{
        struct switchdev_brport_flags flags = {0};
        int flag;

        flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;

        for_each_set_bit(flag, &flags.mask, 32)
                if (br_port_flag_is_set(brport_dev, BIT(flag)))
                        flags.val |= BIT(flag);

        ocelot_port_bridge_flags(ocelot, port, flags);
}

static void ocelot_clear_brport_flags(struct ocelot *ocelot, int port)
{
        struct switchdev_brport_flags flags;

        flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
        flags.val = flags.mask & ~BR_LEARNING;

        ocelot_port_bridge_flags(ocelot, port, flags);
}

static int ocelot_switchdev_sync(struct ocelot *ocelot, int port,
                                 struct net_device *brport_dev,
                                 struct net_device *bridge_dev,
                                 struct netlink_ext_ack *extack)
{
        clock_t ageing_time;
        u8 stp_state;
        int err;

        ocelot_inherit_brport_flags(ocelot, port, brport_dev);

        stp_state = br_port_get_stp_state(brport_dev);
        ocelot_bridge_stp_state_set(ocelot, port, stp_state);

        err = ocelot_port_vlan_filtering(ocelot, port,
                                         br_vlan_enabled(bridge_dev));
        if (err)
                return err;

        ageing_time = br_get_ageing_time(bridge_dev);
        ocelot_port_attr_ageing_set(ocelot, port, ageing_time);

        err = br_mdb_replay(bridge_dev, brport_dev,
                            &ocelot_switchdev_blocking_nb, extack);
        if (err && err != -EOPNOTSUPP)
                return err;

        err = br_fdb_replay(bridge_dev, brport_dev, &ocelot_switchdev_nb);
        if (err)
                return err;

        err = br_vlan_replay(bridge_dev, brport_dev,
                             &ocelot_switchdev_blocking_nb, extack);
        if (err && err != -EOPNOTSUPP)
                return err;

        return 0;
}

static int ocelot_switchdev_unsync(struct ocelot *ocelot, int port)
{
        int err;

        err = ocelot_port_vlan_filtering(ocelot, port, false);
        if (err)
                return err;

        ocelot_clear_brport_flags(ocelot, port);

        ocelot_bridge_stp_state_set(ocelot, port, BR_STATE_FORWARDING);

        return 0;
}

static int ocelot_netdevice_bridge_join(struct net_device *dev,
                                        struct net_device *brport_dev,
                                        struct net_device *bridge,
                                        struct netlink_ext_ack *extack)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;
        int err;

        ocelot_port_bridge_join(ocelot, port, bridge);

        err = ocelot_switchdev_sync(ocelot, port, brport_dev, bridge, extack);
        if (err)
                goto err_switchdev_sync;

        return 0;

err_switchdev_sync:
        ocelot_port_bridge_leave(ocelot, port, bridge);
        return err;
}

static int ocelot_netdevice_bridge_leave(struct net_device *dev,
                                         struct net_device *brport_dev,
                                         struct net_device *bridge)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;
        int err;

        err = ocelot_switchdev_unsync(ocelot, port);
        if (err)
                return err;

        ocelot_port_bridge_leave(ocelot, port, bridge);

        return 0;
}

static int ocelot_netdevice_lag_join(struct net_device *dev,
                                     struct net_device *bond,
                                     struct netdev_lag_upper_info *info,
                                     struct netlink_ext_ack *extack)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        struct net_device *bridge_dev;
        int port = priv->chip_port;
        int err;

        err = ocelot_port_lag_join(ocelot, port, bond, info);
        if (err == -EOPNOTSUPP) {
                NL_SET_ERR_MSG_MOD(extack, "Offloading not supported");
                return 0;
        }

        bridge_dev = netdev_master_upper_dev_get(bond);
        if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
                return 0;

        err = ocelot_netdevice_bridge_join(dev, bond, bridge_dev, extack);
        if (err)
                goto err_bridge_join;

        return 0;

err_bridge_join:
        ocelot_port_lag_leave(ocelot, port, bond);
        return err;
}

static int ocelot_netdevice_lag_leave(struct net_device *dev,
                                      struct net_device *bond)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        struct net_device *bridge_dev;
        int port = priv->chip_port;

        ocelot_port_lag_leave(ocelot, port, bond);

        bridge_dev = netdev_master_upper_dev_get(bond);
        if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
                return 0;

        return ocelot_netdevice_bridge_leave(dev, bond, bridge_dev);
}

static int ocelot_netdevice_changeupper(struct net_device *dev,
                                        struct net_device *brport_dev,
                                        struct netdev_notifier_changeupper_info *info)
{
        struct netlink_ext_ack *extack;
        int err = 0;

        extack = netdev_notifier_info_to_extack(&info->info);

        if (netif_is_bridge_master(info->upper_dev)) {
                if (info->linking)
                        err = ocelot_netdevice_bridge_join(dev, brport_dev,
                                                           info->upper_dev,
                                                           extack);
                else
                        err = ocelot_netdevice_bridge_leave(dev, brport_dev,
                                                            info->upper_dev);
        }
        if (netif_is_lag_master(info->upper_dev)) {
                if (info->linking)
                        err = ocelot_netdevice_lag_join(dev, info->upper_dev,
                                                        info->upper_info, extack);
                else
                        ocelot_netdevice_lag_leave(dev, info->upper_dev);
        }

        return notifier_from_errno(err);
}

/* Treat CHANGEUPPER events on an offloaded LAG as individual CHANGEUPPER
 * events for the lower physical ports of the LAG.
 * If the LAG upper isn't offloaded, ignore its CHANGEUPPER events.
 * In case the LAG joined a bridge, notify that we are offloading it and can do
 * forwarding in hardware towards it.
 */
static int
ocelot_netdevice_lag_changeupper(struct net_device *dev,
                                 struct netdev_notifier_changeupper_info *info)
{
        struct net_device *lower;
        struct list_head *iter;
        int err = NOTIFY_DONE;

        netdev_for_each_lower_dev(dev, lower, iter) {
                struct ocelot_port_private *priv = netdev_priv(lower);
                struct ocelot_port *ocelot_port = &priv->port;

                if (ocelot_port->bond != dev)
                        return NOTIFY_OK;

                err = ocelot_netdevice_changeupper(lower, dev, info);
                if (err)
                        return notifier_from_errno(err);
        }

        return NOTIFY_DONE;
}

static int
ocelot_netdevice_changelowerstate(struct net_device *dev,
                                  struct netdev_lag_lower_state_info *info)
{
        struct ocelot_port_private *priv = netdev_priv(dev);
        bool is_active = info->link_up && info->tx_enabled;
        struct ocelot_port *ocelot_port = &priv->port;
        struct ocelot *ocelot = ocelot_port->ocelot;
        int port = priv->chip_port;

        if (!ocelot_port->bond)
                return NOTIFY_DONE;

        if (ocelot_port->lag_tx_active == is_active)
                return NOTIFY_DONE;

        ocelot_port_lag_change(ocelot, port, is_active);

        return NOTIFY_OK;
}

static int ocelot_netdevice_event(struct notifier_block *unused,
                                  unsigned long event, void *ptr)
{
        struct net_device *dev = netdev_notifier_info_to_dev(ptr);

        switch (event) {
        case NETDEV_CHANGEUPPER: {
                struct netdev_notifier_changeupper_info *info = ptr;

                if (ocelot_netdevice_dev_check(dev))
                        return ocelot_netdevice_changeupper(dev, dev, info);

                if (netif_is_lag_master(dev))
                        return ocelot_netdevice_lag_changeupper(dev, info);

                break;
        }
        case NETDEV_CHANGELOWERSTATE: {
                struct netdev_notifier_changelowerstate_info *info = ptr;

                if (!ocelot_netdevice_dev_check(dev))
                        break;

                return ocelot_netdevice_changelowerstate(dev,
                                                         info->lower_state_info);
        }
        default:
                break;
        }

        return NOTIFY_DONE;
}

struct notifier_block ocelot_netdevice_nb __read_mostly = {
        .notifier_call = ocelot_netdevice_event,
};

static int ocelot_switchdev_event(struct notifier_block *unused,
                                  unsigned long event, void *ptr)
{
        struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
        int err;

        switch (event) {
        case SWITCHDEV_PORT_ATTR_SET:
                err = switchdev_handle_port_attr_set(dev, ptr,
                                                     ocelot_netdevice_dev_check,
                                                     ocelot_port_attr_set);
                return notifier_from_errno(err);
        }

        return NOTIFY_DONE;
}

struct notifier_block ocelot_switchdev_nb __read_mostly = {
        .notifier_call = ocelot_switchdev_event,
};

static int ocelot_switchdev_blocking_event(struct notifier_block *unused,
                                           unsigned long event, void *ptr)
{
        struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
        int err;

        switch (event) {
                /* Blocking events. */
        case SWITCHDEV_PORT_OBJ_ADD:
                err = switchdev_handle_port_obj_add(dev, ptr,
                                                    ocelot_netdevice_dev_check,
                                                    ocelot_port_obj_add);
                return notifier_from_errno(err);
        case SWITCHDEV_PORT_OBJ_DEL:
                err = switchdev_handle_port_obj_del(dev, ptr,
                                                    ocelot_netdevice_dev_check,
                                                    ocelot_port_obj_del);
                return notifier_from_errno(err);
        case SWITCHDEV_PORT_ATTR_SET:
                err = switchdev_handle_port_attr_set(dev, ptr,
                                                     ocelot_netdevice_dev_check,
                                                     ocelot_port_attr_set);
                return notifier_from_errno(err);
        }

        return NOTIFY_DONE;
}

struct notifier_block ocelot_switchdev_blocking_nb __read_mostly = {
        .notifier_call = ocelot_switchdev_blocking_event,
};

int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target,
                      struct phy_device *phy)
{
        struct ocelot_port_private *priv;
        struct ocelot_port *ocelot_port;
        struct net_device *dev;
        int err;

        dev = alloc_etherdev(sizeof(struct ocelot_port_private));
        if (!dev)
                return -ENOMEM;
        SET_NETDEV_DEV(dev, ocelot->dev);
        priv = netdev_priv(dev);
        priv->dev = dev;
        priv->phy = phy;
        priv->chip_port = port;
        ocelot_port = &priv->port;
        ocelot_port->ocelot = ocelot;
        ocelot_port->target = target;
        ocelot->ports[port] = ocelot_port;

        dev->netdev_ops = &ocelot_port_netdev_ops;
        dev->ethtool_ops = &ocelot_ethtool_ops;

        dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXFCS |
                NETIF_F_HW_TC;
        dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC;

        memcpy(dev->dev_addr, ocelot->base_mac, ETH_ALEN);
        dev->dev_addr[ETH_ALEN - 1] += port;
        ocelot_mact_learn(ocelot, PGID_CPU, dev->dev_addr,
                          ocelot_port->pvid_vlan.vid, ENTRYTYPE_LOCKED);

        ocelot_init_port(ocelot, port);

        err = register_netdev(dev);
        if (err) {
                dev_err(ocelot->dev, "register_netdev failed\n");
                free_netdev(dev);
                ocelot->ports[port] = NULL;
                return err;
        }

        return 0;
}

void ocelot_release_port(struct ocelot_port *ocelot_port)
{
        struct ocelot_port_private *priv = container_of(ocelot_port,
                                                struct ocelot_port_private,
                                                port);

        unregister_netdev(priv->dev);
        free_netdev(priv->dev);
}