/*
 * drivers/net/ethernet/mellanox/mlxsw/spectrum.c
 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
 * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
 * Copyright (c) 2015 Elad Raz <eladr@mellanox.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/if_bridge.h>
#include <linux/workqueue.h>
#include <linux/jiffies.h>
#include <linux/bitops.h>
#include <linux/list.h>
#include <net/devlink.h>
#include <net/switchdev.h>
#include <generated/utsrelease.h>

#include "spectrum.h"
#include "core.h"
#include "reg.h"
#include "port.h"
#include "trap.h"
#include "txheader.h"

static const char mlxsw_sp_driver_name[] = "mlxsw_spectrum";
static const char mlxsw_sp_driver_version[] = "1.0";

/* tx_hdr_version
 * Tx header version.
 * Must be set to 1.
 */
MLXSW_ITEM32(tx, hdr, version, 0x00, 28, 4);

/* tx_hdr_ctl
 * Packet control type.
 * 0 - Ethernet control (e.g. EMADs, LACP)
 * 1 - Ethernet data
 */
MLXSW_ITEM32(tx, hdr, ctl, 0x00, 26, 2);

/* tx_hdr_proto
 * Packet protocol type. Must be set to 1 (Ethernet).
 */
MLXSW_ITEM32(tx, hdr, proto, 0x00, 21, 3);

/* tx_hdr_rx_is_router
 * Packet is sent from the router. Valid for data packets only.
 */
MLXSW_ITEM32(tx, hdr, rx_is_router, 0x00, 19, 1);

/* tx_hdr_fid_valid
 * Indicates if the 'fid' field is valid and should be used for
 * forwarding lookup. Valid for data packets only.
 */
MLXSW_ITEM32(tx, hdr, fid_valid, 0x00, 16, 1);

/* tx_hdr_swid
 * Switch partition ID. Must be set to 0.
 */
MLXSW_ITEM32(tx, hdr, swid, 0x00, 12, 3);

/* tx_hdr_control_tclass
 * Indicates if the packet should use the control TClass and not one
 * of the data TClasses.
 */
MLXSW_ITEM32(tx, hdr, control_tclass, 0x00, 6, 1);

/* tx_hdr_etclass
 * Egress TClass to be used on the egress device on the egress port.
 */
MLXSW_ITEM32(tx, hdr, etclass, 0x00, 0, 4);

/* tx_hdr_port_mid
 * Destination local port for unicast packets.
 * Destination multicast ID for multicast packets.
 *
 * Control packets are directed to a specific egress port, while data
 * packets are transmitted through the CPU port (0) into the switch partition,
 * where forwarding rules are applied.
 */
MLXSW_ITEM32(tx, hdr, port_mid, 0x04, 16, 16);

/* tx_hdr_fid
 * Forwarding ID used for L2 forwarding lookup. Valid only if 'fid_valid' is
 * set, otherwise calculated based on the packet's VID using VID to FID mapping.
 * Valid for data packets only.
 */
MLXSW_ITEM32(tx, hdr, fid, 0x08, 0, 16);

/* tx_hdr_type
 * 0 - Data packets
 * 6 - Control packets
 */
MLXSW_ITEM32(tx, hdr, type, 0x0C, 0, 4);

static void mlxsw_sp_txhdr_construct(struct sk_buff *skb,
                                     const struct mlxsw_tx_info *tx_info)
{
        char *txhdr = skb_push(skb, MLXSW_TXHDR_LEN);

        memset(txhdr, 0, MLXSW_TXHDR_LEN);

        mlxsw_tx_hdr_version_set(txhdr, MLXSW_TXHDR_VERSION_1);
        mlxsw_tx_hdr_ctl_set(txhdr, MLXSW_TXHDR_ETH_CTL);
        mlxsw_tx_hdr_proto_set(txhdr, MLXSW_TXHDR_PROTO_ETH);
        mlxsw_tx_hdr_swid_set(txhdr, 0);
        mlxsw_tx_hdr_control_tclass_set(txhdr, 1);
        mlxsw_tx_hdr_port_mid_set(txhdr, tx_info->local_port);
        mlxsw_tx_hdr_type_set(txhdr, MLXSW_TXHDR_TYPE_CONTROL);
}

static int mlxsw_sp_base_mac_get(struct mlxsw_sp *mlxsw_sp)
{
        char spad_pl[MLXSW_REG_SPAD_LEN];
        int err;

        err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(spad), spad_pl);
        if (err)
                return err;
        mlxsw_reg_spad_base_mac_memcpy_from(spad_pl, mlxsw_sp->base_mac);
        return 0;
}

static int mlxsw_sp_port_admin_status_set(struct mlxsw_sp_port *mlxsw_sp_port,
                                          bool is_up)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char paos_pl[MLXSW_REG_PAOS_LEN];

        mlxsw_reg_paos_pack(paos_pl, mlxsw_sp_port->local_port,
                            is_up ? MLXSW_PORT_ADMIN_STATUS_UP :
                            MLXSW_PORT_ADMIN_STATUS_DOWN);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(paos), paos_pl);
}

static int mlxsw_sp_port_oper_status_get(struct mlxsw_sp_port *mlxsw_sp_port,
                                         bool *p_is_up)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char paos_pl[MLXSW_REG_PAOS_LEN];
        u8 oper_status;
        int err;

        mlxsw_reg_paos_pack(paos_pl, mlxsw_sp_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(paos), paos_pl);
        if (err)
                return err;
        oper_status = mlxsw_reg_paos_oper_status_get(paos_pl);
        *p_is_up = oper_status == MLXSW_PORT_ADMIN_STATUS_UP ? true : false;
        return 0;
}

static int mlxsw_sp_port_dev_addr_set(struct mlxsw_sp_port *mlxsw_sp_port,
                                      unsigned char *addr)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char ppad_pl[MLXSW_REG_PPAD_LEN];

        mlxsw_reg_ppad_pack(ppad_pl, true, mlxsw_sp_port->local_port);
        mlxsw_reg_ppad_mac_memcpy_to(ppad_pl, addr);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ppad), ppad_pl);
}

static int mlxsw_sp_port_dev_addr_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        unsigned char *addr = mlxsw_sp_port->dev->dev_addr;

        ether_addr_copy(addr, mlxsw_sp->base_mac);
        addr[ETH_ALEN - 1] += mlxsw_sp_port->local_port;
        return mlxsw_sp_port_dev_addr_set(mlxsw_sp_port, addr);
}

static int mlxsw_sp_port_stp_state_set(struct mlxsw_sp_port *mlxsw_sp_port,
                                       u16 vid, enum mlxsw_reg_spms_state state)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char *spms_pl;
        int err;

        spms_pl = kmalloc(MLXSW_REG_SPMS_LEN, GFP_KERNEL);
        if (!spms_pl)
                return -ENOMEM;
        mlxsw_reg_spms_pack(spms_pl, mlxsw_sp_port->local_port);
        mlxsw_reg_spms_vid_pack(spms_pl, vid, state);
        err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(spms), spms_pl);
        kfree(spms_pl);
        return err;
}

static int mlxsw_sp_port_mtu_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 mtu)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char pmtu_pl[MLXSW_REG_PMTU_LEN];
        int max_mtu;
        int err;

        mtu += MLXSW_TXHDR_LEN + ETH_HLEN;
        mlxsw_reg_pmtu_pack(pmtu_pl, mlxsw_sp_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(pmtu), pmtu_pl);
        if (err)
                return err;
        max_mtu = mlxsw_reg_pmtu_max_mtu_get(pmtu_pl);

        if (mtu > max_mtu)
                return -EINVAL;

        mlxsw_reg_pmtu_pack(pmtu_pl, mlxsw_sp_port->local_port, mtu);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pmtu), pmtu_pl);
}

static int mlxsw_sp_port_swid_set(struct mlxsw_sp_port *mlxsw_sp_port, u8 swid)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char pspa_pl[MLXSW_REG_PSPA_LEN];

        mlxsw_reg_pspa_pack(pspa_pl, swid, mlxsw_sp_port->local_port);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pspa), pspa_pl);
}

static int mlxsw_sp_port_vp_mode_set(struct mlxsw_sp_port *mlxsw_sp_port,
                                     bool enable)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char svpe_pl[MLXSW_REG_SVPE_LEN];

        mlxsw_reg_svpe_pack(svpe_pl, mlxsw_sp_port->local_port, enable);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(svpe), svpe_pl);
}

int mlxsw_sp_port_vid_to_fid_set(struct mlxsw_sp_port *mlxsw_sp_port,
                                 enum mlxsw_reg_svfa_mt mt, bool valid, u16 fid,
                                 u16 vid)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char svfa_pl[MLXSW_REG_SVFA_LEN];

        mlxsw_reg_svfa_pack(svfa_pl, mlxsw_sp_port->local_port, mt, valid,
                            fid, vid);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(svfa), svfa_pl);
}

static int mlxsw_sp_port_vid_learning_set(struct mlxsw_sp_port *mlxsw_sp_port,
                                          u16 vid, bool learn_enable)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char *spvmlr_pl;
        int err;

        spvmlr_pl = kmalloc(MLXSW_REG_SPVMLR_LEN, GFP_KERNEL);
        if (!spvmlr_pl)
                return -ENOMEM;
        mlxsw_reg_spvmlr_pack(spvmlr_pl, mlxsw_sp_port->local_port, vid, vid,
                              learn_enable);
        err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(spvmlr), spvmlr_pl);
        kfree(spvmlr_pl);
        return err;
}

static int
mlxsw_sp_port_system_port_mapping_set(struct mlxsw_sp_port *mlxsw_sp_port)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char sspr_pl[MLXSW_REG_SSPR_LEN];

        mlxsw_reg_sspr_pack(sspr_pl, mlxsw_sp_port->local_port);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sspr), sspr_pl);
}

static int mlxsw_sp_port_module_info_get(struct mlxsw_sp *mlxsw_sp,
                                         u8 local_port, u8 *p_module,
                                         u8 *p_width)
{
        char pmlp_pl[MLXSW_REG_PMLP_LEN];
        int err;

        mlxsw_reg_pmlp_pack(pmlp_pl, local_port);
        err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(pmlp), pmlp_pl);
        if (err)
                return err;
        *p_module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0);
        *p_width = mlxsw_reg_pmlp_width_get(pmlp_pl);
        return 0;
}

static int mlxsw_sp_port_module_map(struct mlxsw_sp *mlxsw_sp, u8 local_port,
                                    u8 module, u8 width, u8 lane)
{
        char pmlp_pl[MLXSW_REG_PMLP_LEN];
        int i;

        mlxsw_reg_pmlp_pack(pmlp_pl, local_port);
        mlxsw_reg_pmlp_width_set(pmlp_pl, width);
        for (i = 0; i < width; i++) {
                mlxsw_reg_pmlp_module_set(pmlp_pl, i, module);
                mlxsw_reg_pmlp_tx_lane_set(pmlp_pl, i, lane + i);  /* Rx & Tx */
        }

        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pmlp), pmlp_pl);
}

static int mlxsw_sp_port_module_unmap(struct mlxsw_sp *mlxsw_sp, u8 local_port)
{
        char pmlp_pl[MLXSW_REG_PMLP_LEN];

        mlxsw_reg_pmlp_pack(pmlp_pl, local_port);
        mlxsw_reg_pmlp_width_set(pmlp_pl, 0);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pmlp), pmlp_pl);
}

static int mlxsw_sp_port_open(struct net_device *dev)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        int err;

        err = mlxsw_sp_port_admin_status_set(mlxsw_sp_port, true);
        if (err)
                return err;
        netif_start_queue(dev);
        return 0;
}

static int mlxsw_sp_port_stop(struct net_device *dev)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);

        netif_stop_queue(dev);
        return mlxsw_sp_port_admin_status_set(mlxsw_sp_port, false);
}

static netdev_tx_t mlxsw_sp_port_xmit(struct sk_buff *skb,
                                      struct net_device *dev)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        struct mlxsw_sp_port_pcpu_stats *pcpu_stats;
        const struct mlxsw_tx_info tx_info = {
                .local_port = mlxsw_sp_port->local_port,
                .is_emad = false,
        };
        u64 len;
        int err;

        if (mlxsw_core_skb_transmit_busy(mlxsw_sp, &tx_info))
                return NETDEV_TX_BUSY;

        if (unlikely(skb_headroom(skb) < MLXSW_TXHDR_LEN)) {
                struct sk_buff *skb_orig = skb;

                skb = skb_realloc_headroom(skb, MLXSW_TXHDR_LEN);
                if (!skb) {
                        this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
                        dev_kfree_skb_any(skb_orig);
                        return NETDEV_TX_OK;
                }
        }

        if (eth_skb_pad(skb)) {
                this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
                return NETDEV_TX_OK;
        }

        mlxsw_sp_txhdr_construct(skb, &tx_info);
        len = skb->len;
        /* Due to a race we might fail here because of a full queue. In that
         * unlikely case we simply drop the packet.
         */
        err = mlxsw_core_skb_transmit(mlxsw_sp, skb, &tx_info);

        if (!err) {
                pcpu_stats = this_cpu_ptr(mlxsw_sp_port->pcpu_stats);
                u64_stats_update_begin(&pcpu_stats->syncp);
                pcpu_stats->tx_packets++;
                pcpu_stats->tx_bytes += len;
                u64_stats_update_end(&pcpu_stats->syncp);
        } else {
                this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
                dev_kfree_skb_any(skb);
        }
        return NETDEV_TX_OK;
}

static void mlxsw_sp_set_rx_mode(struct net_device *dev)
{
}

static int mlxsw_sp_port_set_mac_address(struct net_device *dev, void *p)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct sockaddr *addr = p;
        int err;

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

        err = mlxsw_sp_port_dev_addr_set(mlxsw_sp_port, addr->sa_data);
        if (err)
                return err;
        memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
        return 0;
}

static int mlxsw_sp_port_change_mtu(struct net_device *dev, int mtu)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        int err;

        err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu);
        if (err)
                return err;
        dev->mtu = mtu;
        return 0;
}

static struct rtnl_link_stats64 *
mlxsw_sp_port_get_stats64(struct net_device *dev,
                          struct rtnl_link_stats64 *stats)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp_port_pcpu_stats *p;
        u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
        u32 tx_dropped = 0;
        unsigned int start;
        int i;

        for_each_possible_cpu(i) {
                p = per_cpu_ptr(mlxsw_sp_port->pcpu_stats, i);
                do {
                        start = u64_stats_fetch_begin_irq(&p->syncp);
                        rx_packets      = p->rx_packets;
                        rx_bytes        = p->rx_bytes;
                        tx_packets      = p->tx_packets;
                        tx_bytes        = p->tx_bytes;
                } while (u64_stats_fetch_retry_irq(&p->syncp, start));

                stats->rx_packets       += rx_packets;
                stats->rx_bytes         += rx_bytes;
                stats->tx_packets       += tx_packets;
                stats->tx_bytes         += tx_bytes;
                /* tx_dropped is u32, updated without syncp protection. */
                tx_dropped      += p->tx_dropped;
        }
        stats->tx_dropped       = tx_dropped;
        return stats;
}

int mlxsw_sp_port_vlan_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid_begin,
                           u16 vid_end, bool is_member, bool untagged)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char *spvm_pl;
        int err;

        spvm_pl = kmalloc(MLXSW_REG_SPVM_LEN, GFP_KERNEL);
        if (!spvm_pl)
                return -ENOMEM;

        mlxsw_reg_spvm_pack(spvm_pl, mlxsw_sp_port->local_port, vid_begin,
                            vid_end, is_member, untagged);
        err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(spvm), spvm_pl);
        kfree(spvm_pl);
        return err;
}

static int mlxsw_sp_port_vp_mode_trans(struct mlxsw_sp_port *mlxsw_sp_port)
{
        enum mlxsw_reg_svfa_mt mt = MLXSW_REG_SVFA_MT_PORT_VID_TO_FID;
        u16 vid, last_visited_vid;
        int err;

        for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID) {
                err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt, true, vid,
                                                   vid);
                if (err) {
                        last_visited_vid = vid;
                        goto err_port_vid_to_fid_set;
                }
        }

        err = mlxsw_sp_port_vp_mode_set(mlxsw_sp_port, true);
        if (err) {
                last_visited_vid = VLAN_N_VID;
                goto err_port_vid_to_fid_set;
        }

        return 0;

err_port_vid_to_fid_set:
        for_each_set_bit(vid, mlxsw_sp_port->active_vlans, last_visited_vid)
                mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt, false, vid,
                                             vid);
        return err;
}

static int mlxsw_sp_port_vlan_mode_trans(struct mlxsw_sp_port *mlxsw_sp_port)
{
        enum mlxsw_reg_svfa_mt mt = MLXSW_REG_SVFA_MT_PORT_VID_TO_FID;
        u16 vid;
        int err;

        err = mlxsw_sp_port_vp_mode_set(mlxsw_sp_port, false);
        if (err)
                return err;

        for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID) {
                err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt, false,
                                                   vid, vid);
                if (err)
                        return err;
        }

        return 0;
}

static struct mlxsw_sp_vfid *
mlxsw_sp_vfid_find(const struct mlxsw_sp *mlxsw_sp, u16 vid)
{
        struct mlxsw_sp_vfid *vfid;

        list_for_each_entry(vfid, &mlxsw_sp->port_vfids.list, list) {
                if (vfid->vid == vid)
                        return vfid;
        }

        return NULL;
}

static u16 mlxsw_sp_avail_vfid_get(const struct mlxsw_sp *mlxsw_sp)
{
        return find_first_zero_bit(mlxsw_sp->port_vfids.mapped,
                                   MLXSW_SP_VFID_PORT_MAX);
}

static int __mlxsw_sp_vfid_create(struct mlxsw_sp *mlxsw_sp, u16 vfid)
{
        u16 fid = mlxsw_sp_vfid_to_fid(vfid);
        char sfmr_pl[MLXSW_REG_SFMR_LEN];

        mlxsw_reg_sfmr_pack(sfmr_pl, MLXSW_REG_SFMR_OP_CREATE_FID, fid, 0);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfmr), sfmr_pl);
}

static void __mlxsw_sp_vfid_destroy(struct mlxsw_sp *mlxsw_sp, u16 vfid)
{
        u16 fid = mlxsw_sp_vfid_to_fid(vfid);
        char sfmr_pl[MLXSW_REG_SFMR_LEN];

        mlxsw_reg_sfmr_pack(sfmr_pl, MLXSW_REG_SFMR_OP_DESTROY_FID, fid, 0);
        mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfmr), sfmr_pl);
}

static struct mlxsw_sp_vfid *mlxsw_sp_vfid_create(struct mlxsw_sp *mlxsw_sp,
                                                  u16 vid)
{
        struct device *dev = mlxsw_sp->bus_info->dev;
        struct mlxsw_sp_vfid *vfid;
        u16 n_vfid;
        int err;

        n_vfid = mlxsw_sp_avail_vfid_get(mlxsw_sp);
        if (n_vfid == MLXSW_SP_VFID_PORT_MAX) {
                dev_err(dev, "No available vFIDs\n");
                return ERR_PTR(-ERANGE);
        }

        err = __mlxsw_sp_vfid_create(mlxsw_sp, n_vfid);
        if (err) {
                dev_err(dev, "Failed to create vFID=%d\n", n_vfid);
                return ERR_PTR(err);
        }

        vfid = kzalloc(sizeof(*vfid), GFP_KERNEL);
        if (!vfid)
                goto err_allocate_vfid;

        vfid->vfid = n_vfid;
        vfid->vid = vid;

        list_add(&vfid->list, &mlxsw_sp->port_vfids.list);
        set_bit(n_vfid, mlxsw_sp->port_vfids.mapped);

        return vfid;

err_allocate_vfid:
        __mlxsw_sp_vfid_destroy(mlxsw_sp, n_vfid);
        return ERR_PTR(-ENOMEM);
}

static void mlxsw_sp_vfid_destroy(struct mlxsw_sp *mlxsw_sp,
                                  struct mlxsw_sp_vfid *vfid)
{
        clear_bit(vfid->vfid, mlxsw_sp->port_vfids.mapped);
        list_del(&vfid->list);

        __mlxsw_sp_vfid_destroy(mlxsw_sp, vfid->vfid);

        kfree(vfid);
}

static struct mlxsw_sp_port *
mlxsw_sp_port_vport_create(struct mlxsw_sp_port *mlxsw_sp_port,
                           struct mlxsw_sp_vfid *vfid)
{
        struct mlxsw_sp_port *mlxsw_sp_vport;

        mlxsw_sp_vport = kzalloc(sizeof(*mlxsw_sp_vport), GFP_KERNEL);
        if (!mlxsw_sp_vport)
                return NULL;

        /* dev will be set correctly after the VLAN device is linked
         * with the real device. In case of bridge SELF invocation, dev
         * will remain as is.
         */
        mlxsw_sp_vport->dev = mlxsw_sp_port->dev;
        mlxsw_sp_vport->mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        mlxsw_sp_vport->local_port = mlxsw_sp_port->local_port;
        mlxsw_sp_vport->stp_state = BR_STATE_FORWARDING;
        mlxsw_sp_vport->lagged = mlxsw_sp_port->lagged;
        mlxsw_sp_vport->lag_id = mlxsw_sp_port->lag_id;
        mlxsw_sp_vport->vport.vfid = vfid;
        mlxsw_sp_vport->vport.vid = vfid->vid;

        list_add(&mlxsw_sp_vport->vport.list, &mlxsw_sp_port->vports_list);

        return mlxsw_sp_vport;
}

static void mlxsw_sp_port_vport_destroy(struct mlxsw_sp_port *mlxsw_sp_vport)
{
        list_del(&mlxsw_sp_vport->vport.list);
        kfree(mlxsw_sp_vport);
}

int mlxsw_sp_port_add_vid(struct net_device *dev, __be16 __always_unused proto,
                          u16 vid)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        struct mlxsw_sp_port *mlxsw_sp_vport;
        struct mlxsw_sp_vfid *vfid;
        int err;

        /* VLAN 0 is added to HW filter when device goes up, but it is
         * reserved in our case, so simply return.
         */
        if (!vid)
                return 0;

        if (mlxsw_sp_port_vport_find(mlxsw_sp_port, vid)) {
                netdev_warn(dev, "VID=%d already configured\n", vid);
                return 0;
        }

        vfid = mlxsw_sp_vfid_find(mlxsw_sp, vid);
        if (!vfid) {
                vfid = mlxsw_sp_vfid_create(mlxsw_sp, vid);
                if (IS_ERR(vfid)) {
                        netdev_err(dev, "Failed to create vFID for VID=%d\n",
                                   vid);
                        return PTR_ERR(vfid);
                }
        }

        mlxsw_sp_vport = mlxsw_sp_port_vport_create(mlxsw_sp_port, vfid);
        if (!mlxsw_sp_vport) {
                netdev_err(dev, "Failed to create vPort for VID=%d\n", vid);
                err = -ENOMEM;
                goto err_port_vport_create;
        }

        if (!vfid->nr_vports) {
                err = mlxsw_sp_vport_flood_set(mlxsw_sp_vport, vfid->vfid,
                                               true, false);
                if (err) {
                        netdev_err(dev, "Failed to setup flooding for vFID=%d\n",
                                   vfid->vfid);
                        goto err_vport_flood_set;
                }
        }

        /* When adding the first VLAN interface on a bridged port we need to
         * transition all the active 802.1Q bridge VLANs to use explicit
         * {Port, VID} to FID mappings and set the port's mode to Virtual mode.
         */
        if (list_is_singular(&mlxsw_sp_port->vports_list)) {
                err = mlxsw_sp_port_vp_mode_trans(mlxsw_sp_port);
                if (err) {
                        netdev_err(dev, "Failed to set to Virtual mode\n");
                        goto err_port_vp_mode_trans;
                }
        }

        err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
                                           MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
                                           true,
                                           mlxsw_sp_vfid_to_fid(vfid->vfid),
                                           vid);
        if (err) {
                netdev_err(dev, "Failed to map {Port, VID=%d} to vFID=%d\n",
                           vid, vfid->vfid);
                goto err_port_vid_to_fid_set;
        }

        err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_vport, vid, false);
        if (err) {
                netdev_err(dev, "Failed to disable learning for VID=%d\n", vid);
                goto err_port_vid_learning_set;
        }

        err = mlxsw_sp_port_vlan_set(mlxsw_sp_vport, vid, vid, true, false);
        if (err) {
                netdev_err(dev, "Failed to set VLAN membership for VID=%d\n",
                           vid);
                goto err_port_add_vid;
        }

        err = mlxsw_sp_port_stp_state_set(mlxsw_sp_vport, vid,
                                          MLXSW_REG_SPMS_STATE_FORWARDING);
        if (err) {
                netdev_err(dev, "Failed to set STP state for VID=%d\n", vid);
                goto err_port_stp_state_set;
        }

        vfid->nr_vports++;

        return 0;

err_port_stp_state_set:
        mlxsw_sp_port_vlan_set(mlxsw_sp_vport, vid, vid, false, false);
err_port_add_vid:
        mlxsw_sp_port_vid_learning_set(mlxsw_sp_vport, vid, true);
err_port_vid_learning_set:
        mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
                                     MLXSW_REG_SVFA_MT_PORT_VID_TO_FID, false,
                                     mlxsw_sp_vfid_to_fid(vfid->vfid), vid);
err_port_vid_to_fid_set:
        if (list_is_singular(&mlxsw_sp_port->vports_list))
                mlxsw_sp_port_vlan_mode_trans(mlxsw_sp_port);
err_port_vp_mode_trans:
        if (!vfid->nr_vports)
                mlxsw_sp_vport_flood_set(mlxsw_sp_vport, vfid->vfid, false,
                                         false);
err_vport_flood_set:
        mlxsw_sp_port_vport_destroy(mlxsw_sp_vport);
err_port_vport_create:
        if (!vfid->nr_vports)
                mlxsw_sp_vfid_destroy(mlxsw_sp, vfid);
        return err;
}

int mlxsw_sp_port_kill_vid(struct net_device *dev,
                           __be16 __always_unused proto, u16 vid)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp_port *mlxsw_sp_vport;
        struct mlxsw_sp_vfid *vfid;
        int err;

        /* VLAN 0 is removed from HW filter when device goes down, but
         * it is reserved in our case, so simply return.
         */
        if (!vid)
                return 0;

        mlxsw_sp_vport = mlxsw_sp_port_vport_find(mlxsw_sp_port, vid);
        if (!mlxsw_sp_vport) {
                netdev_warn(dev, "VID=%d does not exist\n", vid);
                return 0;
        }

        vfid = mlxsw_sp_vport->vport.vfid;

        err = mlxsw_sp_port_stp_state_set(mlxsw_sp_vport, vid,
                                          MLXSW_REG_SPMS_STATE_DISCARDING);
        if (err) {
                netdev_err(dev, "Failed to set STP state for VID=%d\n", vid);
                return err;
        }

        err = mlxsw_sp_port_vlan_set(mlxsw_sp_vport, vid, vid, false, false);
        if (err) {
                netdev_err(dev, "Failed to set VLAN membership for VID=%d\n",
                           vid);
                return err;
        }

        err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_vport, vid, true);
        if (err) {
                netdev_err(dev, "Failed to enable learning for VID=%d\n", vid);
                return err;
        }

        err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
                                           MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
                                           false,
                                           mlxsw_sp_vfid_to_fid(vfid->vfid),
                                           vid);
        if (err) {
                netdev_err(dev, "Failed to invalidate {Port, VID=%d} to vFID=%d mapping\n",
                           vid, vfid->vfid);
                return err;
        }

        /* When removing the last VLAN interface on a bridged port we need to
         * transition all active 802.1Q bridge VLANs to use VID to FID
         * mappings and set port's mode to VLAN mode.
         */
        if (list_is_singular(&mlxsw_sp_port->vports_list)) {
                err = mlxsw_sp_port_vlan_mode_trans(mlxsw_sp_port);
                if (err) {
                        netdev_err(dev, "Failed to set to VLAN mode\n");
                        return err;
                }
        }

        vfid->nr_vports--;
        mlxsw_sp_port_vport_destroy(mlxsw_sp_vport);

        /* Destroy the vFID if no vPorts are assigned to it anymore. */
        if (!vfid->nr_vports)
                mlxsw_sp_vfid_destroy(mlxsw_sp_port->mlxsw_sp, vfid);

        return 0;
}

static const struct net_device_ops mlxsw_sp_port_netdev_ops = {
        .ndo_open               = mlxsw_sp_port_open,
        .ndo_stop               = mlxsw_sp_port_stop,
        .ndo_start_xmit         = mlxsw_sp_port_xmit,
        .ndo_set_rx_mode        = mlxsw_sp_set_rx_mode,
        .ndo_set_mac_address    = mlxsw_sp_port_set_mac_address,
        .ndo_change_mtu         = mlxsw_sp_port_change_mtu,
        .ndo_get_stats64        = mlxsw_sp_port_get_stats64,
        .ndo_vlan_rx_add_vid    = mlxsw_sp_port_add_vid,
        .ndo_vlan_rx_kill_vid   = mlxsw_sp_port_kill_vid,
        .ndo_fdb_add            = switchdev_port_fdb_add,
        .ndo_fdb_del            = switchdev_port_fdb_del,
        .ndo_fdb_dump           = switchdev_port_fdb_dump,
        .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
        .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
        .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
};

static void mlxsw_sp_port_get_drvinfo(struct net_device *dev,
                                      struct ethtool_drvinfo *drvinfo)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;

        strlcpy(drvinfo->driver, mlxsw_sp_driver_name, sizeof(drvinfo->driver));
        strlcpy(drvinfo->version, mlxsw_sp_driver_version,
                sizeof(drvinfo->version));
        snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
                 "%d.%d.%d",
                 mlxsw_sp->bus_info->fw_rev.major,
                 mlxsw_sp->bus_info->fw_rev.minor,
                 mlxsw_sp->bus_info->fw_rev.subminor);
        strlcpy(drvinfo->bus_info, mlxsw_sp->bus_info->device_name,
                sizeof(drvinfo->bus_info));
}

struct mlxsw_sp_port_hw_stats {
        char str[ETH_GSTRING_LEN];
        u64 (*getter)(char *payload);
};

static const struct mlxsw_sp_port_hw_stats mlxsw_sp_port_hw_stats[] = {
        {
                .str = "a_frames_transmitted_ok",
                .getter = mlxsw_reg_ppcnt_a_frames_transmitted_ok_get,
        },
        {
                .str = "a_frames_received_ok",
                .getter = mlxsw_reg_ppcnt_a_frames_received_ok_get,
        },
        {
                .str = "a_frame_check_sequence_errors",
                .getter = mlxsw_reg_ppcnt_a_frame_check_sequence_errors_get,
        },
        {
                .str = "a_alignment_errors",
                .getter = mlxsw_reg_ppcnt_a_alignment_errors_get,
        },
        {
                .str = "a_octets_transmitted_ok",
                .getter = mlxsw_reg_ppcnt_a_octets_transmitted_ok_get,
        },
        {
                .str = "a_octets_received_ok",
                .getter = mlxsw_reg_ppcnt_a_octets_received_ok_get,
        },
        {
                .str = "a_multicast_frames_xmitted_ok",
                .getter = mlxsw_reg_ppcnt_a_multicast_frames_xmitted_ok_get,
        },
        {
                .str = "a_broadcast_frames_xmitted_ok",
                .getter = mlxsw_reg_ppcnt_a_broadcast_frames_xmitted_ok_get,
        },
        {
                .str = "a_multicast_frames_received_ok",
                .getter = mlxsw_reg_ppcnt_a_multicast_frames_received_ok_get,
        },
        {
                .str = "a_broadcast_frames_received_ok",
                .getter = mlxsw_reg_ppcnt_a_broadcast_frames_received_ok_get,
        },
        {
                .str = "a_in_range_length_errors",
                .getter = mlxsw_reg_ppcnt_a_in_range_length_errors_get,
        },
        {
                .str = "a_out_of_range_length_field",
                .getter = mlxsw_reg_ppcnt_a_out_of_range_length_field_get,
        },
        {
                .str = "a_frame_too_long_errors",
                .getter = mlxsw_reg_ppcnt_a_frame_too_long_errors_get,
        },
        {
                .str = "a_symbol_error_during_carrier",
                .getter = mlxsw_reg_ppcnt_a_symbol_error_during_carrier_get,
        },
        {
                .str = "a_mac_control_frames_transmitted",
                .getter = mlxsw_reg_ppcnt_a_mac_control_frames_transmitted_get,
        },
        {
                .str = "a_mac_control_frames_received",
                .getter = mlxsw_reg_ppcnt_a_mac_control_frames_received_get,
        },
        {
                .str = "a_unsupported_opcodes_received",
                .getter = mlxsw_reg_ppcnt_a_unsupported_opcodes_received_get,
        },
        {
                .str = "a_pause_mac_ctrl_frames_received",
                .getter = mlxsw_reg_ppcnt_a_pause_mac_ctrl_frames_received_get,
        },
        {
                .str = "a_pause_mac_ctrl_frames_xmitted",
                .getter = mlxsw_reg_ppcnt_a_pause_mac_ctrl_frames_transmitted_get,
        },
};

#define MLXSW_SP_PORT_HW_STATS_LEN ARRAY_SIZE(mlxsw_sp_port_hw_stats)

static void mlxsw_sp_port_get_strings(struct net_device *dev,
                                      u32 stringset, u8 *data)
{
        u8 *p = data;
        int i;

        switch (stringset) {
        case ETH_SS_STATS:
                for (i = 0; i < MLXSW_SP_PORT_HW_STATS_LEN; i++) {
                        memcpy(p, mlxsw_sp_port_hw_stats[i].str,
                               ETH_GSTRING_LEN);
                        p += ETH_GSTRING_LEN;
                }
                break;
        }

}

static int mlxsw_sp_port_set_phys_id(struct net_device *dev,
                                     enum ethtool_phys_id_state state)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char mlcr_pl[MLXSW_REG_MLCR_LEN];
        bool active;

        switch (state) {
        case ETHTOOL_ID_ACTIVE:
                active = true;
                break;
        case ETHTOOL_ID_INACTIVE:
                active = false;
                break;
        default:
                return -EOPNOTSUPP;
        }

        mlxsw_reg_mlcr_pack(mlcr_pl, mlxsw_sp_port->local_port, active);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mlcr), mlcr_pl);
}

static void mlxsw_sp_port_get_stats(struct net_device *dev,
                                    struct ethtool_stats *stats, u64 *data)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char ppcnt_pl[MLXSW_REG_PPCNT_LEN];
        int i;
        int err;

        mlxsw_reg_ppcnt_pack(ppcnt_pl, mlxsw_sp_port->local_port);
        err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ppcnt), ppcnt_pl);
        for (i = 0; i < MLXSW_SP_PORT_HW_STATS_LEN; i++)
                data[i] = !err ? mlxsw_sp_port_hw_stats[i].getter(ppcnt_pl) : 0;
}

static int mlxsw_sp_port_get_sset_count(struct net_device *dev, int sset)
{
        switch (sset) {
        case ETH_SS_STATS:
                return MLXSW_SP_PORT_HW_STATS_LEN;
        default:
                return -EOPNOTSUPP;
        }
}

struct mlxsw_sp_port_link_mode {
        u32 mask;
        u32 supported;
        u32 advertised;
        u32 speed;
};

static const struct mlxsw_sp_port_link_mode mlxsw_sp_port_link_mode[] = {
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_100BASE_T,
                .supported      = SUPPORTED_100baseT_Full,
                .advertised     = ADVERTISED_100baseT_Full,
                .speed          = 100,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_100BASE_TX,
                .speed          = 100,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_SGMII |
                                  MLXSW_REG_PTYS_ETH_SPEED_1000BASE_KX,
                .supported      = SUPPORTED_1000baseKX_Full,
                .advertised     = ADVERTISED_1000baseKX_Full,
                .speed          = 1000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_10GBASE_T,
                .supported      = SUPPORTED_10000baseT_Full,
                .advertised     = ADVERTISED_10000baseT_Full,
                .speed          = 10000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_10GBASE_CX4 |
                                  MLXSW_REG_PTYS_ETH_SPEED_10GBASE_KX4,
                .supported      = SUPPORTED_10000baseKX4_Full,
                .advertised     = ADVERTISED_10000baseKX4_Full,
                .speed          = 10000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_10GBASE_KR |
                                  MLXSW_REG_PTYS_ETH_SPEED_10GBASE_CR |
                                  MLXSW_REG_PTYS_ETH_SPEED_10GBASE_SR |
                                  MLXSW_REG_PTYS_ETH_SPEED_10GBASE_ER_LR,
                .supported      = SUPPORTED_10000baseKR_Full,
                .advertised     = ADVERTISED_10000baseKR_Full,
                .speed          = 10000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_20GBASE_KR2,
                .supported      = SUPPORTED_20000baseKR2_Full,
                .advertised     = ADVERTISED_20000baseKR2_Full,
                .speed          = 20000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_40GBASE_CR4,
                .supported      = SUPPORTED_40000baseCR4_Full,
                .advertised     = ADVERTISED_40000baseCR4_Full,
                .speed          = 40000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_40GBASE_KR4,
                .supported      = SUPPORTED_40000baseKR4_Full,
                .advertised     = ADVERTISED_40000baseKR4_Full,
                .speed          = 40000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_40GBASE_SR4,
                .supported      = SUPPORTED_40000baseSR4_Full,
                .advertised     = ADVERTISED_40000baseSR4_Full,
                .speed          = 40000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_40GBASE_LR4_ER4,
                .supported      = SUPPORTED_40000baseLR4_Full,
                .advertised     = ADVERTISED_40000baseLR4_Full,
                .speed          = 40000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_25GBASE_CR |
                                  MLXSW_REG_PTYS_ETH_SPEED_25GBASE_KR |
                                  MLXSW_REG_PTYS_ETH_SPEED_25GBASE_SR,
                .speed          = 25000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_50GBASE_KR4 |
                                  MLXSW_REG_PTYS_ETH_SPEED_50GBASE_CR2 |
                                  MLXSW_REG_PTYS_ETH_SPEED_50GBASE_KR2,
                .speed          = 50000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_56GBASE_R4,
                .supported      = SUPPORTED_56000baseKR4_Full,
                .advertised     = ADVERTISED_56000baseKR4_Full,
                .speed          = 56000,
        },
        {
                .mask           = MLXSW_REG_PTYS_ETH_SPEED_100GBASE_CR4 |
                                  MLXSW_REG_PTYS_ETH_SPEED_100GBASE_SR4 |
                                  MLXSW_REG_PTYS_ETH_SPEED_100GBASE_KR4 |
                                  MLXSW_REG_PTYS_ETH_SPEED_100GBASE_LR4_ER4,
                .speed          = 100000,
        },
};

#define MLXSW_SP_PORT_LINK_MODE_LEN ARRAY_SIZE(mlxsw_sp_port_link_mode)

static u32 mlxsw_sp_from_ptys_supported_port(u32 ptys_eth_proto)
{
        if (ptys_eth_proto & (MLXSW_REG_PTYS_ETH_SPEED_10GBASE_CR |
                              MLXSW_REG_PTYS_ETH_SPEED_10GBASE_SR |
                              MLXSW_REG_PTYS_ETH_SPEED_40GBASE_CR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_40GBASE_SR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_100GBASE_SR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_SGMII))
                return SUPPORTED_FIBRE;

        if (ptys_eth_proto & (MLXSW_REG_PTYS_ETH_SPEED_10GBASE_KR |
                              MLXSW_REG_PTYS_ETH_SPEED_10GBASE_KX4 |
                              MLXSW_REG_PTYS_ETH_SPEED_40GBASE_KR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_100GBASE_KR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_1000BASE_KX))
                return SUPPORTED_Backplane;
        return 0;
}

static u32 mlxsw_sp_from_ptys_supported_link(u32 ptys_eth_proto)
{
        u32 modes = 0;
        int i;

        for (i = 0; i < MLXSW_SP_PORT_LINK_MODE_LEN; i++) {
                if (ptys_eth_proto & mlxsw_sp_port_link_mode[i].mask)
                        modes |= mlxsw_sp_port_link_mode[i].supported;
        }
        return modes;
}

static u32 mlxsw_sp_from_ptys_advert_link(u32 ptys_eth_proto)
{
        u32 modes = 0;
        int i;

        for (i = 0; i < MLXSW_SP_PORT_LINK_MODE_LEN; i++) {
                if (ptys_eth_proto & mlxsw_sp_port_link_mode[i].mask)
                        modes |= mlxsw_sp_port_link_mode[i].advertised;
        }
        return modes;
}

static void mlxsw_sp_from_ptys_speed_duplex(bool carrier_ok, u32 ptys_eth_proto,
                                            struct ethtool_cmd *cmd)
{
        u32 speed = SPEED_UNKNOWN;
        u8 duplex = DUPLEX_UNKNOWN;
        int i;

        if (!carrier_ok)
                goto out;

        for (i = 0; i < MLXSW_SP_PORT_LINK_MODE_LEN; i++) {
                if (ptys_eth_proto & mlxsw_sp_port_link_mode[i].mask) {
                        speed = mlxsw_sp_port_link_mode[i].speed;
                        duplex = DUPLEX_FULL;
                        break;
                }
        }
out:
        ethtool_cmd_speed_set(cmd, speed);
        cmd->duplex = duplex;
}

static u8 mlxsw_sp_port_connector_port(u32 ptys_eth_proto)
{
        if (ptys_eth_proto & (MLXSW_REG_PTYS_ETH_SPEED_10GBASE_SR |
                              MLXSW_REG_PTYS_ETH_SPEED_40GBASE_SR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_100GBASE_SR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_SGMII))
                return PORT_FIBRE;

        if (ptys_eth_proto & (MLXSW_REG_PTYS_ETH_SPEED_10GBASE_CR |
                              MLXSW_REG_PTYS_ETH_SPEED_40GBASE_CR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_100GBASE_CR4))
                return PORT_DA;

        if (ptys_eth_proto & (MLXSW_REG_PTYS_ETH_SPEED_10GBASE_KR |
                              MLXSW_REG_PTYS_ETH_SPEED_10GBASE_KX4 |
                              MLXSW_REG_PTYS_ETH_SPEED_40GBASE_KR4 |
                              MLXSW_REG_PTYS_ETH_SPEED_100GBASE_KR4))
                return PORT_NONE;

        return PORT_OTHER;
}

static int mlxsw_sp_port_get_settings(struct net_device *dev,
                                      struct ethtool_cmd *cmd)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char ptys_pl[MLXSW_REG_PTYS_LEN];
        u32 eth_proto_cap;
        u32 eth_proto_admin;
        u32 eth_proto_oper;
        int err;

        mlxsw_reg_ptys_pack(ptys_pl, mlxsw_sp_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
        if (err) {
                netdev_err(dev, "Failed to get proto");
                return err;
        }
        mlxsw_reg_ptys_unpack(ptys_pl, &eth_proto_cap,
                              &eth_proto_admin, &eth_proto_oper);

        cmd->supported = mlxsw_sp_from_ptys_supported_port(eth_proto_cap) |
                         mlxsw_sp_from_ptys_supported_link(eth_proto_cap) |
                         SUPPORTED_Pause | SUPPORTED_Asym_Pause;
        cmd->advertising = mlxsw_sp_from_ptys_advert_link(eth_proto_admin);
        mlxsw_sp_from_ptys_speed_duplex(netif_carrier_ok(dev),
                                        eth_proto_oper, cmd);

        eth_proto_oper = eth_proto_oper ? eth_proto_oper : eth_proto_cap;
        cmd->port = mlxsw_sp_port_connector_port(eth_proto_oper);
        cmd->lp_advertising = mlxsw_sp_from_ptys_advert_link(eth_proto_oper);

        cmd->transceiver = XCVR_INTERNAL;
        return 0;
}

static u32 mlxsw_sp_to_ptys_advert_link(u32 advertising)
{
        u32 ptys_proto = 0;
        int i;

        for (i = 0; i < MLXSW_SP_PORT_LINK_MODE_LEN; i++) {
                if (advertising & mlxsw_sp_port_link_mode[i].advertised)
                        ptys_proto |= mlxsw_sp_port_link_mode[i].mask;
        }
        return ptys_proto;
}

static u32 mlxsw_sp_to_ptys_speed(u32 speed)
{
        u32 ptys_proto = 0;
        int i;

        for (i = 0; i < MLXSW_SP_PORT_LINK_MODE_LEN; i++) {
                if (speed == mlxsw_sp_port_link_mode[i].speed)
                        ptys_proto |= mlxsw_sp_port_link_mode[i].mask;
        }
        return ptys_proto;
}

static u32 mlxsw_sp_to_ptys_upper_speed(u32 upper_speed)
{
        u32 ptys_proto = 0;
        int i;

        for (i = 0; i < MLXSW_SP_PORT_LINK_MODE_LEN; i++) {
                if (mlxsw_sp_port_link_mode[i].speed <= upper_speed)
                        ptys_proto |= mlxsw_sp_port_link_mode[i].mask;
        }
        return ptys_proto;
}

static int mlxsw_sp_port_set_settings(struct net_device *dev,
                                      struct ethtool_cmd *cmd)
{
        struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char ptys_pl[MLXSW_REG_PTYS_LEN];
        u32 speed;
        u32 eth_proto_new;
        u32 eth_proto_cap;
        u32 eth_proto_admin;
        bool is_up;
        int err;

        speed = ethtool_cmd_speed(cmd);

        eth_proto_new = cmd->autoneg == AUTONEG_ENABLE ?
                mlxsw_sp_to_ptys_advert_link(cmd->advertising) :
                mlxsw_sp_to_ptys_speed(speed);

        mlxsw_reg_ptys_pack(ptys_pl, mlxsw_sp_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
        if (err) {
                netdev_err(dev, "Failed to get proto");
                return err;
        }
        mlxsw_reg_ptys_unpack(ptys_pl, &eth_proto_cap, &eth_proto_admin, NULL);

        eth_proto_new = eth_proto_new & eth_proto_cap;
        if (!eth_proto_new) {
                netdev_err(dev, "Not supported proto admin requested");
                return -EINVAL;
        }
        if (eth_proto_new == eth_proto_admin)
                return 0;

        mlxsw_reg_ptys_pack(ptys_pl, mlxsw_sp_port->local_port, eth_proto_new);
        err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
        if (err) {
                netdev_err(dev, "Failed to set proto admin");
                return err;
        }

        err = mlxsw_sp_port_oper_status_get(mlxsw_sp_port, &is_up);
        if (err) {
                netdev_err(dev, "Failed to get oper status");
                return err;
        }
        if (!is_up)
                return 0;

        err = mlxsw_sp_port_admin_status_set(mlxsw_sp_port, false);
        if (err) {
                netdev_err(dev, "Failed to set admin status");
                return err;
        }

        err = mlxsw_sp_port_admin_status_set(mlxsw_sp_port, true);
        if (err) {
                netdev_err(dev, "Failed to set admin status");
                return err;
        }

        return 0;
}

static const struct ethtool_ops mlxsw_sp_port_ethtool_ops = {
        .get_drvinfo            = mlxsw_sp_port_get_drvinfo,
        .get_link               = ethtool_op_get_link,
        .get_strings            = mlxsw_sp_port_get_strings,
        .set_phys_id            = mlxsw_sp_port_set_phys_id,
        .get_ethtool_stats      = mlxsw_sp_port_get_stats,
        .get_sset_count         = mlxsw_sp_port_get_sset_count,
        .get_settings           = mlxsw_sp_port_get_settings,
        .set_settings           = mlxsw_sp_port_set_settings,
};

static int
mlxsw_sp_port_speed_by_width_set(struct mlxsw_sp_port *mlxsw_sp_port, u8 width)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        u32 upper_speed = MLXSW_SP_PORT_BASE_SPEED * width;
        char ptys_pl[MLXSW_REG_PTYS_LEN];
        u32 eth_proto_admin;

        eth_proto_admin = mlxsw_sp_to_ptys_upper_speed(upper_speed);
        mlxsw_reg_ptys_pack(ptys_pl, mlxsw_sp_port->local_port,
                            eth_proto_admin);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
}

static int __mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
                                  bool split, u8 module, u8 width)
{
        struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
        struct mlxsw_sp_port *mlxsw_sp_port;
        struct devlink_port *devlink_port;
        struct net_device *dev;
        size_t bytes;
        int err;

        dev = alloc_etherdev(sizeof(struct mlxsw_sp_port));
        if (!dev)
                return -ENOMEM;
        mlxsw_sp_port = netdev_priv(dev);
        mlxsw_sp_port->dev = dev;
        mlxsw_sp_port->mlxsw_sp = mlxsw_sp;
        mlxsw_sp_port->local_port = local_port;
        mlxsw_sp_port->split = split;
        bytes = DIV_ROUND_UP(VLAN_N_VID, BITS_PER_BYTE);
        mlxsw_sp_port->active_vlans = kzalloc(bytes, GFP_KERNEL);
        if (!mlxsw_sp_port->active_vlans) {
                err = -ENOMEM;
                goto err_port_active_vlans_alloc;
        }
        mlxsw_sp_port->untagged_vlans = kzalloc(bytes, GFP_KERNEL);
        if (!mlxsw_sp_port->untagged_vlans) {
                err = -ENOMEM;
                goto err_port_untagged_vlans_alloc;
        }
        INIT_LIST_HEAD(&mlxsw_sp_port->vports_list);

        mlxsw_sp_port->pcpu_stats =
                netdev_alloc_pcpu_stats(struct mlxsw_sp_port_pcpu_stats);
        if (!mlxsw_sp_port->pcpu_stats) {
                err = -ENOMEM;
                goto err_alloc_stats;
        }

        dev->netdev_ops = &mlxsw_sp_port_netdev_ops;
        dev->ethtool_ops = &mlxsw_sp_port_ethtool_ops;

        err = mlxsw_sp_port_dev_addr_init(mlxsw_sp_port);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Unable to init port mac address\n",
                        mlxsw_sp_port->local_port);
                goto err_dev_addr_init;
        }

        netif_carrier_off(dev);

        dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_LLTX | NETIF_F_SG |
                         NETIF_F_HW_VLAN_CTAG_FILTER;

        /* Each packet needs to have a Tx header (metadata) on top all other
         * headers.
         */
        dev->hard_header_len += MLXSW_TXHDR_LEN;

        devlink_port = &mlxsw_sp_port->devlink_port;
        if (mlxsw_sp_port->split)
                devlink_port_split_set(devlink_port, module);
        err = devlink_port_register(devlink, devlink_port, local_port);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to register devlink port\n",
                        mlxsw_sp_port->local_port);
                goto err_devlink_port_register;
        }

        err = mlxsw_sp_port_system_port_mapping_set(mlxsw_sp_port);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to set system port mapping\n",
                        mlxsw_sp_port->local_port);
                goto err_port_system_port_mapping_set;
        }

        err = mlxsw_sp_port_swid_set(mlxsw_sp_port, 0);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to set SWID\n",
                        mlxsw_sp_port->local_port);
                goto err_port_swid_set;
        }

        err = mlxsw_sp_port_speed_by_width_set(mlxsw_sp_port, width);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to enable speeds\n",
                        mlxsw_sp_port->local_port);
                goto err_port_speed_by_width_set;
        }

        err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, ETH_DATA_LEN);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to set MTU\n",
                        mlxsw_sp_port->local_port);
                goto err_port_mtu_set;
        }

        err = mlxsw_sp_port_admin_status_set(mlxsw_sp_port, false);
        if (err)
                goto err_port_admin_status_set;

        err = mlxsw_sp_port_buffers_init(mlxsw_sp_port);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to initialize buffers\n",
                        mlxsw_sp_port->local_port);
                goto err_port_buffers_init;
        }

        mlxsw_sp_port_switchdev_init(mlxsw_sp_port);
        err = register_netdev(dev);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Port %d: Failed to register netdev\n",
                        mlxsw_sp_port->local_port);
                goto err_register_netdev;
        }

        devlink_port_type_eth_set(devlink_port, dev);

        err = mlxsw_sp_port_vlan_init(mlxsw_sp_port);
        if (err)
                goto err_port_vlan_init;

        mlxsw_sp->ports[local_port] = mlxsw_sp_port;
        return 0;

err_port_vlan_init:
        unregister_netdev(dev);
err_register_netdev:
err_port_buffers_init:
err_port_admin_status_set:
err_port_mtu_set:
err_port_speed_by_width_set:
err_port_swid_set:
err_port_system_port_mapping_set:
        devlink_port_unregister(&mlxsw_sp_port->devlink_port);
err_devlink_port_register:
err_dev_addr_init:
        free_percpu(mlxsw_sp_port->pcpu_stats);
err_alloc_stats:
        kfree(mlxsw_sp_port->untagged_vlans);
err_port_untagged_vlans_alloc:
        kfree(mlxsw_sp_port->active_vlans);
err_port_active_vlans_alloc:
        free_netdev(dev);
        return err;
}

static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
                                bool split, u8 module, u8 width, u8 lane)
{
        int err;

        err = mlxsw_sp_port_module_map(mlxsw_sp, local_port, module, width,
                                       lane);
        if (err)
                return err;

        err = __mlxsw_sp_port_create(mlxsw_sp, local_port, split, module,
                                     width);
        if (err)
                goto err_port_create;

        return 0;

err_port_create:
        mlxsw_sp_port_module_unmap(mlxsw_sp, local_port);
        return err;
}

static void mlxsw_sp_port_vports_fini(struct mlxsw_sp_port *mlxsw_sp_port)
{
        struct net_device *dev = mlxsw_sp_port->dev;
        struct mlxsw_sp_port *mlxsw_sp_vport, *tmp;

        list_for_each_entry_safe(mlxsw_sp_vport, tmp,
                                 &mlxsw_sp_port->vports_list, vport.list) {
                u16 vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);

                /* vPorts created for VLAN devices should already be gone
                 * by now, since we unregistered the port netdev.
                 */
                WARN_ON(is_vlan_dev(mlxsw_sp_vport->dev));
                mlxsw_sp_port_kill_vid(dev, 0, vid);
        }
}

static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
{
        struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp->ports[local_port];
        struct devlink_port *devlink_port;

        if (!mlxsw_sp_port)
                return;
        mlxsw_sp->ports[local_port] = NULL;
        devlink_port = &mlxsw_sp_port->devlink_port;
        devlink_port_type_clear(devlink_port);
        unregister_netdev(mlxsw_sp_port->dev); /* This calls ndo_stop */
        devlink_port_unregister(devlink_port);
        mlxsw_sp_port_vports_fini(mlxsw_sp_port);
        mlxsw_sp_port_switchdev_fini(mlxsw_sp_port);
        mlxsw_sp_port_swid_set(mlxsw_sp_port, MLXSW_PORT_SWID_DISABLED_PORT);
        mlxsw_sp_port_module_unmap(mlxsw_sp, mlxsw_sp_port->local_port);
        free_percpu(mlxsw_sp_port->pcpu_stats);
        kfree(mlxsw_sp_port->untagged_vlans);
        kfree(mlxsw_sp_port->active_vlans);
        free_netdev(mlxsw_sp_port->dev);
}

static void mlxsw_sp_ports_remove(struct mlxsw_sp *mlxsw_sp)
{
        int i;

        for (i = 1; i < MLXSW_PORT_MAX_PORTS; i++)
                mlxsw_sp_port_remove(mlxsw_sp, i);
        kfree(mlxsw_sp->ports);
}

static int mlxsw_sp_ports_create(struct mlxsw_sp *mlxsw_sp)
{
        size_t alloc_size;
        u8 module, width;
        int i;
        int err;

        alloc_size = sizeof(struct mlxsw_sp_port *) * MLXSW_PORT_MAX_PORTS;
        mlxsw_sp->ports = kzalloc(alloc_size, GFP_KERNEL);
        if (!mlxsw_sp->ports)
                return -ENOMEM;

        for (i = 1; i < MLXSW_PORT_MAX_PORTS; i++) {
                err = mlxsw_sp_port_module_info_get(mlxsw_sp, i, &module,
                                                    &width);
                if (err)
                        goto err_port_module_info_get;
                if (!width)
                        continue;
                mlxsw_sp->port_to_module[i] = module;
                err = __mlxsw_sp_port_create(mlxsw_sp, i, false, module, width);
                if (err)
                        goto err_port_create;
        }
        return 0;

err_port_create:
err_port_module_info_get:
        for (i--; i >= 1; i--)
                mlxsw_sp_port_remove(mlxsw_sp, i);
        kfree(mlxsw_sp->ports);
        return err;
}

static u8 mlxsw_sp_cluster_base_port_get(u8 local_port)
{
        u8 offset = (local_port - 1) % MLXSW_SP_PORTS_PER_CLUSTER_MAX;

        return local_port - offset;
}

static int mlxsw_sp_port_split(void *priv, u8 local_port, unsigned int count)
{
        struct mlxsw_sp *mlxsw_sp = priv;
        struct mlxsw_sp_port *mlxsw_sp_port;
        u8 width = MLXSW_PORT_MODULE_MAX_WIDTH / count;
        u8 module, cur_width, base_port;
        int i;
        int err;

        mlxsw_sp_port = mlxsw_sp->ports[local_port];
        if (!mlxsw_sp_port) {
                dev_err(mlxsw_sp->bus_info->dev, "Port number \"%d\" does not exist\n",
                        local_port);
                return -EINVAL;
        }

        if (count != 2 && count != 4) {
                netdev_err(mlxsw_sp_port->dev, "Port can only be split into 2 or 4 ports\n");
                return -EINVAL;
        }

        err = mlxsw_sp_port_module_info_get(mlxsw_sp, local_port, &module,
                                            &cur_width);
        if (err) {
                netdev_err(mlxsw_sp_port->dev, "Failed to get port's width\n");
                return err;
        }

        if (cur_width != MLXSW_PORT_MODULE_MAX_WIDTH) {
                netdev_err(mlxsw_sp_port->dev, "Port cannot be split further\n");
                return -EINVAL;
        }

        /* Make sure we have enough slave (even) ports for the split. */
        if (count == 2) {
                base_port = local_port;
                if (mlxsw_sp->ports[base_port + 1]) {
                        netdev_err(mlxsw_sp_port->dev, "Invalid split configuration\n");
                        return -EINVAL;
                }
        } else {
                base_port = mlxsw_sp_cluster_base_port_get(local_port);
                if (mlxsw_sp->ports[base_port + 1] ||
                    mlxsw_sp->ports[base_port + 3]) {
                        netdev_err(mlxsw_sp_port->dev, "Invalid split configuration\n");
                        return -EINVAL;
                }
        }

        for (i = 0; i < count; i++)
                mlxsw_sp_port_remove(mlxsw_sp, base_port + i);

        for (i = 0; i < count; i++) {
                err = mlxsw_sp_port_create(mlxsw_sp, base_port + i, true,
                                           module, width, i * width);
                if (err) {
                        dev_err(mlxsw_sp->bus_info->dev, "Failed to create split port\n");
                        goto err_port_create;
                }
        }

        return 0;

err_port_create:
        for (i--; i >= 0; i--)
                mlxsw_sp_port_remove(mlxsw_sp, base_port + i);
        for (i = 0; i < count / 2; i++) {
                module = mlxsw_sp->port_to_module[base_port + i * 2];
                mlxsw_sp_port_create(mlxsw_sp, base_port + i * 2, false,
                                     module, MLXSW_PORT_MODULE_MAX_WIDTH, 0);
        }
        return err;
}

static int mlxsw_sp_port_unsplit(void *priv, u8 local_port)
{
        struct mlxsw_sp *mlxsw_sp = priv;
        struct mlxsw_sp_port *mlxsw_sp_port;
        u8 module, cur_width, base_port;
        unsigned int count;
        int i;
        int err;

        mlxsw_sp_port = mlxsw_sp->ports[local_port];
        if (!mlxsw_sp_port) {
                dev_err(mlxsw_sp->bus_info->dev, "Port number \"%d\" does not exist\n",
                        local_port);
                return -EINVAL;
        }

        if (!mlxsw_sp_port->split) {
                netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
                return -EINVAL;
        }

        err = mlxsw_sp_port_module_info_get(mlxsw_sp, local_port, &module,
                                            &cur_width);
        if (err) {
                netdev_err(mlxsw_sp_port->dev, "Failed to get port's width\n");
                return err;
        }
        count = cur_width == 1 ? 4 : 2;

        base_port = mlxsw_sp_cluster_base_port_get(local_port);

        /* Determine which ports to remove. */
        if (count == 2 && local_port >= base_port + 2)
                base_port = base_port + 2;

        for (i = 0; i < count; i++)
                mlxsw_sp_port_remove(mlxsw_sp, base_port + i);

        for (i = 0; i < count / 2; i++) {
                module = mlxsw_sp->port_to_module[base_port + i * 2];
                err = mlxsw_sp_port_create(mlxsw_sp, base_port + i * 2, false,
                                           module, MLXSW_PORT_MODULE_MAX_WIDTH,
                                           0);
                if (err)
                        dev_err(mlxsw_sp->bus_info->dev, "Failed to reinstantiate port\n");
        }

        return 0;
}

static void mlxsw_sp_pude_event_func(const struct mlxsw_reg_info *reg,
                                     char *pude_pl, void *priv)
{
        struct mlxsw_sp *mlxsw_sp = priv;
        struct mlxsw_sp_port *mlxsw_sp_port;
        enum mlxsw_reg_pude_oper_status status;
        u8 local_port;

        local_port = mlxsw_reg_pude_local_port_get(pude_pl);
        mlxsw_sp_port = mlxsw_sp->ports[local_port];
        if (!mlxsw_sp_port) {
                dev_warn(mlxsw_sp->bus_info->dev, "Port %d: Link event received for non-existent port\n",
                         local_port);
                return;
        }

        status = mlxsw_reg_pude_oper_status_get(pude_pl);
        if (status == MLXSW_PORT_OPER_STATUS_UP) {
                netdev_info(mlxsw_sp_port->dev, "link up\n");
                netif_carrier_on(mlxsw_sp_port->dev);
        } else {
                netdev_info(mlxsw_sp_port->dev, "link down\n");
                netif_carrier_off(mlxsw_sp_port->dev);
        }
}

static struct mlxsw_event_listener mlxsw_sp_pude_event = {
        .func = mlxsw_sp_pude_event_func,
        .trap_id = MLXSW_TRAP_ID_PUDE,
};

static int mlxsw_sp_event_register(struct mlxsw_sp *mlxsw_sp,
                                   enum mlxsw_event_trap_id trap_id)
{
        struct mlxsw_event_listener *el;
        char hpkt_pl[MLXSW_REG_HPKT_LEN];
        int err;

        switch (trap_id) {
        case MLXSW_TRAP_ID_PUDE:
                el = &mlxsw_sp_pude_event;
                break;
        }
        err = mlxsw_core_event_listener_register(mlxsw_sp->core, el, mlxsw_sp);
        if (err)
                return err;

        mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_FORWARD, trap_id);
        err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(hpkt), hpkt_pl);
        if (err)
                goto err_event_trap_set;

        return 0;

err_event_trap_set:
        mlxsw_core_event_listener_unregister(mlxsw_sp->core, el, mlxsw_sp);
        return err;
}

static void mlxsw_sp_event_unregister(struct mlxsw_sp *mlxsw_sp,
                                      enum mlxsw_event_trap_id trap_id)
{
        struct mlxsw_event_listener *el;

        switch (trap_id) {
        case MLXSW_TRAP_ID_PUDE:
                el = &mlxsw_sp_pude_event;
                break;
        }
        mlxsw_core_event_listener_unregister(mlxsw_sp->core, el, mlxsw_sp);
}

static void mlxsw_sp_rx_listener_func(struct sk_buff *skb, u8 local_port,
                                      void *priv)
{
        struct mlxsw_sp *mlxsw_sp = priv;
        struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp->ports[local_port];
        struct mlxsw_sp_port_pcpu_stats *pcpu_stats;

        if (unlikely(!mlxsw_sp_port)) {
                dev_warn_ratelimited(mlxsw_sp->bus_info->dev, "Port %d: skb received for non-existent port\n",
                                     local_port);
                return;
        }

        skb->dev = mlxsw_sp_port->dev;

        pcpu_stats = this_cpu_ptr(mlxsw_sp_port->pcpu_stats);
        u64_stats_update_begin(&pcpu_stats->syncp);
        pcpu_stats->rx_packets++;
        pcpu_stats->rx_bytes += skb->len;
        u64_stats_update_end(&pcpu_stats->syncp);

        skb->protocol = eth_type_trans(skb, skb->dev);
        netif_receive_skb(skb);
}

static const struct mlxsw_rx_listener mlxsw_sp_rx_listener[] = {
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_FDB_MC,
        },
        /* Traps for specific L2 packet types, not trapped as FDB MC */
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_STP,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_LACP,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_EAPOL,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_LLDP,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_MMRP,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_MVRP,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_RPVST,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_DHCP,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_QUERY,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V1_REPORT,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V2_REPORT,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V2_LEAVE,
        },
        {
                .func = mlxsw_sp_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V3_REPORT,
        },
};

static int mlxsw_sp_traps_init(struct mlxsw_sp *mlxsw_sp)
{
        char htgt_pl[MLXSW_REG_HTGT_LEN];
        char hpkt_pl[MLXSW_REG_HPKT_LEN];
        int i;
        int err;

        mlxsw_reg_htgt_pack(htgt_pl, MLXSW_REG_HTGT_TRAP_GROUP_RX);
        err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(htgt), htgt_pl);
        if (err)
                return err;

        mlxsw_reg_htgt_pack(htgt_pl, MLXSW_REG_HTGT_TRAP_GROUP_CTRL);
        err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(htgt), htgt_pl);
        if (err)
                return err;

        for (i = 0; i < ARRAY_SIZE(mlxsw_sp_rx_listener); i++) {
                err = mlxsw_core_rx_listener_register(mlxsw_sp->core,
                                                      &mlxsw_sp_rx_listener[i],
                                                      mlxsw_sp);
                if (err)
                        goto err_rx_listener_register;

                mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_TRAP_TO_CPU,
                                    mlxsw_sp_rx_listener[i].trap_id);
                err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(hpkt), hpkt_pl);
                if (err)
                        goto err_rx_trap_set;
        }
        return 0;

err_rx_trap_set:
        mlxsw_core_rx_listener_unregister(mlxsw_sp->core,
                                          &mlxsw_sp_rx_listener[i],
                                          mlxsw_sp);
err_rx_listener_register:
        for (i--; i >= 0; i--) {
                mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_FORWARD,
                                    mlxsw_sp_rx_listener[i].trap_id);
                mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(hpkt), hpkt_pl);

                mlxsw_core_rx_listener_unregister(mlxsw_sp->core,
                                                  &mlxsw_sp_rx_listener[i],

                                                  mlxsw_sp);
        }
        return err;
}

static void mlxsw_sp_traps_fini(struct mlxsw_sp *mlxsw_sp)
{
        char hpkt_pl[MLXSW_REG_HPKT_LEN];
        int i;

        for (i = 0; i < ARRAY_SIZE(mlxsw_sp_rx_listener); i++) {
                mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_FORWARD,
                                    mlxsw_sp_rx_listener[i].trap_id);
                mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(hpkt), hpkt_pl);

                mlxsw_core_rx_listener_unregister(mlxsw_sp->core,
                                                  &mlxsw_sp_rx_listener[i],
                                                  mlxsw_sp);
        }
}

static int __mlxsw_sp_flood_init(struct mlxsw_core *mlxsw_core,
                                 enum mlxsw_reg_sfgc_type type,
                                 enum mlxsw_reg_sfgc_bridge_type bridge_type)
{
        enum mlxsw_flood_table_type table_type;
        enum mlxsw_sp_flood_table flood_table;
        char sfgc_pl[MLXSW_REG_SFGC_LEN];

        if (bridge_type == MLXSW_REG_SFGC_BRIDGE_TYPE_VFID)
                table_type = MLXSW_REG_SFGC_TABLE_TYPE_FID;
        else
                table_type = MLXSW_REG_SFGC_TABLE_TYPE_FID_OFFEST;

        if (type == MLXSW_REG_SFGC_TYPE_UNKNOWN_UNICAST)
                flood_table = MLXSW_SP_FLOOD_TABLE_UC;
        else
                flood_table = MLXSW_SP_FLOOD_TABLE_BM;

        mlxsw_reg_sfgc_pack(sfgc_pl, type, bridge_type, table_type,
                            flood_table);
        return mlxsw_reg_write(mlxsw_core, MLXSW_REG(sfgc), sfgc_pl);
}

static int mlxsw_sp_flood_init(struct mlxsw_sp *mlxsw_sp)
{
        int type, err;

        for (type = 0; type < MLXSW_REG_SFGC_TYPE_MAX; type++) {
                if (type == MLXSW_REG_SFGC_TYPE_RESERVED)
                        continue;

                err = __mlxsw_sp_flood_init(mlxsw_sp->core, type,
                                            MLXSW_REG_SFGC_BRIDGE_TYPE_VFID);
                if (err)
                        return err;

                err = __mlxsw_sp_flood_init(mlxsw_sp->core, type,
                                            MLXSW_REG_SFGC_BRIDGE_TYPE_1Q_FID);
                if (err)
                        return err;
        }

        return 0;
}

static int mlxsw_sp_lag_init(struct mlxsw_sp *mlxsw_sp)
{
        char slcr_pl[MLXSW_REG_SLCR_LEN];

        mlxsw_reg_slcr_pack(slcr_pl, MLXSW_REG_SLCR_LAG_HASH_SMAC |
                                     MLXSW_REG_SLCR_LAG_HASH_DMAC |
                                     MLXSW_REG_SLCR_LAG_HASH_ETHERTYPE |
                                     MLXSW_REG_SLCR_LAG_HASH_VLANID |
                                     MLXSW_REG_SLCR_LAG_HASH_SIP |
                                     MLXSW_REG_SLCR_LAG_HASH_DIP |
                                     MLXSW_REG_SLCR_LAG_HASH_SPORT |
                                     MLXSW_REG_SLCR_LAG_HASH_DPORT |
                                     MLXSW_REG_SLCR_LAG_HASH_IPPROTO);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(slcr), slcr_pl);
}

static int mlxsw_sp_init(void *priv, struct mlxsw_core *mlxsw_core,
                         const struct mlxsw_bus_info *mlxsw_bus_info)
{
        struct mlxsw_sp *mlxsw_sp = priv;
        int err;

        mlxsw_sp->core = mlxsw_core;
        mlxsw_sp->bus_info = mlxsw_bus_info;
        INIT_LIST_HEAD(&mlxsw_sp->port_vfids.list);
        INIT_LIST_HEAD(&mlxsw_sp->br_vfids.list);
        INIT_LIST_HEAD(&mlxsw_sp->br_mids.list);

        err = mlxsw_sp_base_mac_get(mlxsw_sp);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to get base mac\n");
                return err;
        }

        err = mlxsw_sp_ports_create(mlxsw_sp);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to create ports\n");
                return err;
        }

        err = mlxsw_sp_event_register(mlxsw_sp, MLXSW_TRAP_ID_PUDE);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to register for PUDE events\n");
                goto err_event_register;
        }

        err = mlxsw_sp_traps_init(mlxsw_sp);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to set traps for RX\n");
                goto err_rx_listener_register;
        }

        err = mlxsw_sp_flood_init(mlxsw_sp);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize flood tables\n");
                goto err_flood_init;
        }

        err = mlxsw_sp_buffers_init(mlxsw_sp);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize buffers\n");
                goto err_buffers_init;
        }

        err = mlxsw_sp_lag_init(mlxsw_sp);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize LAG\n");
                goto err_lag_init;
        }

        err = mlxsw_sp_switchdev_init(mlxsw_sp);
        if (err) {
                dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize switchdev\n");
                goto err_switchdev_init;
        }

        return 0;

err_switchdev_init:
err_lag_init:
err_buffers_init:
err_flood_init:
        mlxsw_sp_traps_fini(mlxsw_sp);
err_rx_listener_register:
        mlxsw_sp_event_unregister(mlxsw_sp, MLXSW_TRAP_ID_PUDE);
err_event_register:
        mlxsw_sp_ports_remove(mlxsw_sp);
        return err;
}

static void mlxsw_sp_fini(void *priv)
{
        struct mlxsw_sp *mlxsw_sp = priv;

        mlxsw_sp_switchdev_fini(mlxsw_sp);
        mlxsw_sp_traps_fini(mlxsw_sp);
        mlxsw_sp_event_unregister(mlxsw_sp, MLXSW_TRAP_ID_PUDE);
        mlxsw_sp_ports_remove(mlxsw_sp);
}

static struct mlxsw_config_profile mlxsw_sp_config_profile = {
        .used_max_vepa_channels         = 1,
        .max_vepa_channels              = 0,
        .used_max_lag                   = 1,
        .max_lag                        = MLXSW_SP_LAG_MAX,
        .used_max_port_per_lag          = 1,
        .max_port_per_lag               = MLXSW_SP_PORT_PER_LAG_MAX,
        .used_max_mid                   = 1,
        .max_mid                        = MLXSW_SP_MID_MAX,
        .used_max_pgt                   = 1,
        .max_pgt                        = 0,
        .used_max_system_port           = 1,
        .max_system_port                = 64,
        .used_max_vlan_groups           = 1,
        .max_vlan_groups                = 127,
        .used_max_regions               = 1,
        .max_regions                    = 400,
        .used_flood_tables              = 1,
        .used_flood_mode                = 1,
        .flood_mode                     = 3,
        .max_fid_offset_flood_tables    = 2,
        .fid_offset_flood_table_size    = VLAN_N_VID - 1,
        .max_fid_flood_tables           = 2,
        .fid_flood_table_size           = MLXSW_SP_VFID_MAX,
        .used_max_ib_mc                 = 1,
        .max_ib_mc                      = 0,
        .used_max_pkey                  = 1,
        .max_pkey                       = 0,
        .swid_config                    = {
                {
                        .used_type      = 1,
                        .type           = MLXSW_PORT_SWID_TYPE_ETH,
                }
        },
};

static struct mlxsw_driver mlxsw_sp_driver = {
        .kind                   = MLXSW_DEVICE_KIND_SPECTRUM,
        .owner                  = THIS_MODULE,
        .priv_size              = sizeof(struct mlxsw_sp),
        .init                   = mlxsw_sp_init,
        .fini                   = mlxsw_sp_fini,
        .port_split             = mlxsw_sp_port_split,
        .port_unsplit           = mlxsw_sp_port_unsplit,
        .txhdr_construct        = mlxsw_sp_txhdr_construct,
        .txhdr_len              = MLXSW_TXHDR_LEN,
        .profile                = &mlxsw_sp_config_profile,
};

static int
mlxsw_sp_port_fdb_flush_by_port(const struct mlxsw_sp_port *mlxsw_sp_port)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char sfdf_pl[MLXSW_REG_SFDF_LEN];

        mlxsw_reg_sfdf_pack(sfdf_pl, MLXSW_REG_SFDF_FLUSH_PER_PORT);
        mlxsw_reg_sfdf_system_port_set(sfdf_pl, mlxsw_sp_port->local_port);

        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfdf), sfdf_pl);
}

static int
mlxsw_sp_port_fdb_flush_by_port_fid(const struct mlxsw_sp_port *mlxsw_sp_port,
                                    u16 fid)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char sfdf_pl[MLXSW_REG_SFDF_LEN];

        mlxsw_reg_sfdf_pack(sfdf_pl, MLXSW_REG_SFDF_FLUSH_PER_PORT_AND_FID);
        mlxsw_reg_sfdf_fid_set(sfdf_pl, fid);
        mlxsw_reg_sfdf_port_fid_system_port_set(sfdf_pl,
                                                mlxsw_sp_port->local_port);

        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfdf), sfdf_pl);
}

static int
mlxsw_sp_port_fdb_flush_by_lag_id(const struct mlxsw_sp_port *mlxsw_sp_port)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char sfdf_pl[MLXSW_REG_SFDF_LEN];

        mlxsw_reg_sfdf_pack(sfdf_pl, MLXSW_REG_SFDF_FLUSH_PER_LAG);
        mlxsw_reg_sfdf_lag_id_set(sfdf_pl, mlxsw_sp_port->lag_id);

        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfdf), sfdf_pl);
}

static int
mlxsw_sp_port_fdb_flush_by_lag_id_fid(const struct mlxsw_sp_port *mlxsw_sp_port,
                                      u16 fid)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char sfdf_pl[MLXSW_REG_SFDF_LEN];

        mlxsw_reg_sfdf_pack(sfdf_pl, MLXSW_REG_SFDF_FLUSH_PER_LAG_AND_FID);
        mlxsw_reg_sfdf_fid_set(sfdf_pl, fid);
        mlxsw_reg_sfdf_lag_fid_lag_id_set(sfdf_pl, mlxsw_sp_port->lag_id);

        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfdf), sfdf_pl);
}

static int
__mlxsw_sp_port_fdb_flush(const struct mlxsw_sp_port *mlxsw_sp_port)
{
        int err, last_err = 0;
        u16 vid;

        for (vid = 1; vid < VLAN_N_VID - 1; vid++) {
                err = mlxsw_sp_port_fdb_flush_by_port_fid(mlxsw_sp_port, vid);
                if (err)
                        last_err = err;
        }

        return last_err;
}

static int
__mlxsw_sp_port_fdb_flush_lagged(const struct mlxsw_sp_port *mlxsw_sp_port)
{
        int err, last_err = 0;
        u16 vid;

        for (vid = 1; vid < VLAN_N_VID - 1; vid++) {
                err = mlxsw_sp_port_fdb_flush_by_lag_id_fid(mlxsw_sp_port, vid);
                if (err)
                        last_err = err;
        }

        return last_err;
}

static int mlxsw_sp_port_fdb_flush(struct mlxsw_sp_port *mlxsw_sp_port)
{
        if (!list_empty(&mlxsw_sp_port->vports_list))
                if (mlxsw_sp_port->lagged)
                        return __mlxsw_sp_port_fdb_flush_lagged(mlxsw_sp_port);
                else
                        return __mlxsw_sp_port_fdb_flush(mlxsw_sp_port);
        else
                if (mlxsw_sp_port->lagged)
                        return mlxsw_sp_port_fdb_flush_by_lag_id(mlxsw_sp_port);
                else
                        return mlxsw_sp_port_fdb_flush_by_port(mlxsw_sp_port);
}

static int mlxsw_sp_vport_fdb_flush(struct mlxsw_sp_port *mlxsw_sp_vport)
{
        u16 vfid = mlxsw_sp_vport_vfid_get(mlxsw_sp_vport);
        u16 fid = mlxsw_sp_vfid_to_fid(vfid);

        if (mlxsw_sp_vport->lagged)
                return mlxsw_sp_port_fdb_flush_by_lag_id_fid(mlxsw_sp_vport,
                                                             fid);
        else
                return mlxsw_sp_port_fdb_flush_by_port_fid(mlxsw_sp_vport, fid);
}

static bool mlxsw_sp_port_dev_check(const struct net_device *dev)
{
        return dev->netdev_ops == &mlxsw_sp_port_netdev_ops;
}

static int mlxsw_sp_port_bridge_join(struct mlxsw_sp_port *mlxsw_sp_port)
{
        struct net_device *dev = mlxsw_sp_port->dev;
        int err;

        /* When port is not bridged untagged packets are tagged with
         * PVID=VID=1, thereby creating an implicit VLAN interface in
         * the device. Remove it and let bridge code take care of its
         * own VLANs.
         */
        err = mlxsw_sp_port_kill_vid(dev, 0, 1);
        if (err)
                return err;

        mlxsw_sp_port->learning = 1;
        mlxsw_sp_port->learning_sync = 1;
        mlxsw_sp_port->uc_flood = 1;
        mlxsw_sp_port->bridged = 1;

        return 0;
}

static int mlxsw_sp_port_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_port,
                                      bool flush_fdb)
{
        struct net_device *dev = mlxsw_sp_port->dev;

        if (flush_fdb && mlxsw_sp_port_fdb_flush(mlxsw_sp_port))
                netdev_err(mlxsw_sp_port->dev, "Failed to flush FDB\n");

        mlxsw_sp_port_pvid_set(mlxsw_sp_port, 1);

        mlxsw_sp_port->learning = 0;
        mlxsw_sp_port->learning_sync = 0;
        mlxsw_sp_port->uc_flood = 0;
        mlxsw_sp_port->bridged = 0;

        /* Add implicit VLAN interface in the device, so that untagged
         * packets will be classified to the default vFID.
         */
        return mlxsw_sp_port_add_vid(dev, 0, 1);
}

static bool mlxsw_sp_master_bridge_check(struct mlxsw_sp *mlxsw_sp,
                                         struct net_device *br_dev)
{
        return !mlxsw_sp->master_bridge.dev ||
               mlxsw_sp->master_bridge.dev == br_dev;
}

static void mlxsw_sp_master_bridge_inc(struct mlxsw_sp *mlxsw_sp,
                                       struct net_device *br_dev)
{
        mlxsw_sp->master_bridge.dev = br_dev;
        mlxsw_sp->master_bridge.ref_count++;
}

static void mlxsw_sp_master_bridge_dec(struct mlxsw_sp *mlxsw_sp,
                                       struct net_device *br_dev)
{
        if (--mlxsw_sp->master_bridge.ref_count == 0)
                mlxsw_sp->master_bridge.dev = NULL;
}

static int mlxsw_sp_lag_create(struct mlxsw_sp *mlxsw_sp, u16 lag_id)
{
        char sldr_pl[MLXSW_REG_SLDR_LEN];

        mlxsw_reg_sldr_lag_create_pack(sldr_pl, lag_id);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sldr), sldr_pl);
}

static int mlxsw_sp_lag_destroy(struct mlxsw_sp *mlxsw_sp, u16 lag_id)
{
        char sldr_pl[MLXSW_REG_SLDR_LEN];

        mlxsw_reg_sldr_lag_destroy_pack(sldr_pl, lag_id);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sldr), sldr_pl);
}

static int mlxsw_sp_lag_col_port_add(struct mlxsw_sp_port *mlxsw_sp_port,
                                     u16 lag_id, u8 port_index)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char slcor_pl[MLXSW_REG_SLCOR_LEN];

        mlxsw_reg_slcor_port_add_pack(slcor_pl, mlxsw_sp_port->local_port,
                                      lag_id, port_index);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(slcor), slcor_pl);
}

static int mlxsw_sp_lag_col_port_remove(struct mlxsw_sp_port *mlxsw_sp_port,
                                        u16 lag_id)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char slcor_pl[MLXSW_REG_SLCOR_LEN];

        mlxsw_reg_slcor_port_remove_pack(slcor_pl, mlxsw_sp_port->local_port,
                                         lag_id);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(slcor), slcor_pl);
}

static int mlxsw_sp_lag_col_port_enable(struct mlxsw_sp_port *mlxsw_sp_port,
                                        u16 lag_id)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char slcor_pl[MLXSW_REG_SLCOR_LEN];

        mlxsw_reg_slcor_col_enable_pack(slcor_pl, mlxsw_sp_port->local_port,
                                        lag_id);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(slcor), slcor_pl);
}

static int mlxsw_sp_lag_col_port_disable(struct mlxsw_sp_port *mlxsw_sp_port,
                                         u16 lag_id)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char slcor_pl[MLXSW_REG_SLCOR_LEN];

        mlxsw_reg_slcor_col_disable_pack(slcor_pl, mlxsw_sp_port->local_port,
                                         lag_id);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(slcor), slcor_pl);
}

static int mlxsw_sp_lag_index_get(struct mlxsw_sp *mlxsw_sp,
                                  struct net_device *lag_dev,
                                  u16 *p_lag_id)
{
        struct mlxsw_sp_upper *lag;
        int free_lag_id = -1;
        int i;

        for (i = 0; i < MLXSW_SP_LAG_MAX; i++) {
                lag = mlxsw_sp_lag_get(mlxsw_sp, i);
                if (lag->ref_count) {
                        if (lag->dev == lag_dev) {
                                *p_lag_id = i;
                                return 0;
                        }
                } else if (free_lag_id < 0) {
                        free_lag_id = i;
                }
        }
        if (free_lag_id < 0)
                return -EBUSY;
        *p_lag_id = free_lag_id;
        return 0;
}

static bool
mlxsw_sp_master_lag_check(struct mlxsw_sp *mlxsw_sp,
                          struct net_device *lag_dev,
                          struct netdev_lag_upper_info *lag_upper_info)
{
        u16 lag_id;

        if (mlxsw_sp_lag_index_get(mlxsw_sp, lag_dev, &lag_id) != 0)
                return false;
        if (lag_upper_info->tx_type != NETDEV_LAG_TX_TYPE_HASH)
                return false;
        return true;
}

static int mlxsw_sp_port_lag_index_get(struct mlxsw_sp *mlxsw_sp,
                                       u16 lag_id, u8 *p_port_index)
{
        int i;

        for (i = 0; i < MLXSW_SP_PORT_PER_LAG_MAX; i++) {
                if (!mlxsw_sp_port_lagged_get(mlxsw_sp, lag_id, i)) {
                        *p_port_index = i;
                        return 0;
                }
        }
        return -EBUSY;
}

static int mlxsw_sp_port_lag_join(struct mlxsw_sp_port *mlxsw_sp_port,
                                  struct net_device *lag_dev)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        struct mlxsw_sp_upper *lag;
        u16 lag_id;
        u8 port_index;
        int err;

        err = mlxsw_sp_lag_index_get(mlxsw_sp, lag_dev, &lag_id);
        if (err)
                return err;
        lag = mlxsw_sp_lag_get(mlxsw_sp, lag_id);
        if (!lag->ref_count) {
                err = mlxsw_sp_lag_create(mlxsw_sp, lag_id);
                if (err)
                        return err;
                lag->dev = lag_dev;
        }

        err = mlxsw_sp_port_lag_index_get(mlxsw_sp, lag_id, &port_index);
        if (err)
                return err;
        err = mlxsw_sp_lag_col_port_add(mlxsw_sp_port, lag_id, port_index);
        if (err)
                goto err_col_port_add;
        err = mlxsw_sp_lag_col_port_enable(mlxsw_sp_port, lag_id);
        if (err)
                goto err_col_port_enable;

        mlxsw_core_lag_mapping_set(mlxsw_sp->core, lag_id, port_index,
                                   mlxsw_sp_port->local_port);
        mlxsw_sp_port->lag_id = lag_id;
        mlxsw_sp_port->lagged = 1;
        lag->ref_count++;
        return 0;

err_col_port_enable:
        mlxsw_sp_lag_col_port_remove(mlxsw_sp_port, lag_id);
err_col_port_add:
        if (!lag->ref_count)
                mlxsw_sp_lag_destroy(mlxsw_sp, lag_id);
        return err;
}

static int mlxsw_sp_vport_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_vport,
                                       struct net_device *br_dev,
                                       bool flush_fdb);

static int mlxsw_sp_port_lag_leave(struct mlxsw_sp_port *mlxsw_sp_port,
                                   struct net_device *lag_dev)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        struct mlxsw_sp_port *mlxsw_sp_vport;
        struct mlxsw_sp_upper *lag;
        u16 lag_id = mlxsw_sp_port->lag_id;
        int err;

        if (!mlxsw_sp_port->lagged)
                return 0;
        lag = mlxsw_sp_lag_get(mlxsw_sp, lag_id);
        WARN_ON(lag->ref_count == 0);

        err = mlxsw_sp_lag_col_port_disable(mlxsw_sp_port, lag_id);
        if (err)
                return err;
        err = mlxsw_sp_lag_col_port_remove(mlxsw_sp_port, lag_id);
        if (err)
                return err;

        /* In case we leave a LAG device that has bridges built on top,
         * then their teardown sequence is never issued and we need to
         * invoke the necessary cleanup routines ourselves.
         */
        list_for_each_entry(mlxsw_sp_vport, &mlxsw_sp_port->vports_list,
                            vport.list) {
                struct net_device *br_dev;

                if (!mlxsw_sp_vport->bridged)
                        continue;

                br_dev = mlxsw_sp_vport_br_get(mlxsw_sp_vport);
                mlxsw_sp_vport_bridge_leave(mlxsw_sp_vport, br_dev, false);
        }

        if (mlxsw_sp_port->bridged) {
                mlxsw_sp_port_active_vlans_del(mlxsw_sp_port);
                mlxsw_sp_port_bridge_leave(mlxsw_sp_port, false);
                mlxsw_sp_master_bridge_dec(mlxsw_sp, NULL);
        }

        if (lag->ref_count == 1) {
                if (mlxsw_sp_port_fdb_flush_by_lag_id(mlxsw_sp_port))
                        netdev_err(mlxsw_sp_port->dev, "Failed to flush FDB\n");
                err = mlxsw_sp_lag_destroy(mlxsw_sp, lag_id);
                if (err)
                        return err;
        }

        mlxsw_core_lag_mapping_clear(mlxsw_sp->core, lag_id,
                                     mlxsw_sp_port->local_port);
        mlxsw_sp_port->lagged = 0;
        lag->ref_count--;
        return 0;
}

static int mlxsw_sp_lag_dist_port_add(struct mlxsw_sp_port *mlxsw_sp_port,
                                      u16 lag_id)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char sldr_pl[MLXSW_REG_SLDR_LEN];

        mlxsw_reg_sldr_lag_add_port_pack(sldr_pl, lag_id,
                                         mlxsw_sp_port->local_port);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sldr), sldr_pl);
}

static int mlxsw_sp_lag_dist_port_remove(struct mlxsw_sp_port *mlxsw_sp_port,
                                         u16 lag_id)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        char sldr_pl[MLXSW_REG_SLDR_LEN];

        mlxsw_reg_sldr_lag_remove_port_pack(sldr_pl, lag_id,
                                            mlxsw_sp_port->local_port);
        return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sldr), sldr_pl);
}

static int mlxsw_sp_port_lag_tx_en_set(struct mlxsw_sp_port *mlxsw_sp_port,
                                       bool lag_tx_enabled)
{
        if (lag_tx_enabled)
                return mlxsw_sp_lag_dist_port_add(mlxsw_sp_port,
                                                  mlxsw_sp_port->lag_id);
        else
                return mlxsw_sp_lag_dist_port_remove(mlxsw_sp_port,
                                                     mlxsw_sp_port->lag_id);
}

static int mlxsw_sp_port_lag_changed(struct mlxsw_sp_port *mlxsw_sp_port,
                                     struct netdev_lag_lower_state_info *info)
{
        return mlxsw_sp_port_lag_tx_en_set(mlxsw_sp_port, info->tx_enabled);
}

static int mlxsw_sp_port_vlan_link(struct mlxsw_sp_port *mlxsw_sp_port,
                                   struct net_device *vlan_dev)
{
        struct mlxsw_sp_port *mlxsw_sp_vport;
        u16 vid = vlan_dev_vlan_id(vlan_dev);

        mlxsw_sp_vport = mlxsw_sp_port_vport_find(mlxsw_sp_port, vid);
        if (!mlxsw_sp_vport) {
                WARN_ON(!mlxsw_sp_vport);
                return -EINVAL;
        }

        mlxsw_sp_vport->dev = vlan_dev;

        return 0;
}

static int mlxsw_sp_port_vlan_unlink(struct mlxsw_sp_port *mlxsw_sp_port,
                                     struct net_device *vlan_dev)
{
        struct mlxsw_sp_port *mlxsw_sp_vport;
        u16 vid = vlan_dev_vlan_id(vlan_dev);

        mlxsw_sp_vport = mlxsw_sp_port_vport_find(mlxsw_sp_port, vid);
        if (!mlxsw_sp_vport) {
                WARN_ON(!mlxsw_sp_vport);
                return -EINVAL;
        }

        /* When removing a VLAN device while still bridged we should first
         * remove it from the bridge, as we receive the bridge's notification
         * when the vPort is already gone.
         */
        if (mlxsw_sp_vport->bridged) {
                struct net_device *br_dev;

                br_dev = mlxsw_sp_vport_br_get(mlxsw_sp_vport);
                mlxsw_sp_vport_bridge_leave(mlxsw_sp_vport, br_dev, true);
        }

        mlxsw_sp_vport->dev = mlxsw_sp_port->dev;

        return 0;
}

static int mlxsw_sp_netdevice_port_upper_event(struct net_device *dev,
                                               unsigned long event, void *ptr)
{
        struct netdev_notifier_changeupper_info *info;
        struct mlxsw_sp_port *mlxsw_sp_port;
        struct net_device *upper_dev;
        struct mlxsw_sp *mlxsw_sp;
        int err;

        mlxsw_sp_port = netdev_priv(dev);
        mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
        info = ptr;

        switch (event) {
        case NETDEV_PRECHANGEUPPER:
                upper_dev = info->upper_dev;
                if (!info->master || !info->linking)
                        break;
                /* HW limitation forbids to put ports to multiple bridges. */
                if (netif_is_bridge_master(upper_dev) &&
                    !mlxsw_sp_master_bridge_check(mlxsw_sp, upper_dev))
                        return NOTIFY_BAD;
                if (netif_is_lag_master(upper_dev) &&
                    !mlxsw_sp_master_lag_check(mlxsw_sp, upper_dev,
                                               info->upper_info))
                        return NOTIFY_BAD;
                break;
        case NETDEV_CHANGEUPPER:
                upper_dev = info->upper_dev;
                if (is_vlan_dev(upper_dev)) {
                        if (info->linking) {
                                err = mlxsw_sp_port_vlan_link(mlxsw_sp_port,
                                                              upper_dev);
                                if (err) {
                                        netdev_err(dev, "Failed to link VLAN device\n");
                                        return NOTIFY_BAD;
                                }
                        } else {
                                err = mlxsw_sp_port_vlan_unlink(mlxsw_sp_port,
                                                                upper_dev);
                                if (err) {
                                        netdev_err(dev, "Failed to unlink VLAN device\n");
                                        return NOTIFY_BAD;
                                }
                        }
                } else if (netif_is_bridge_master(upper_dev)) {
                        if (info->linking) {
                                err = mlxsw_sp_port_bridge_join(mlxsw_sp_port);
                                if (err) {
                                        netdev_err(dev, "Failed to join bridge\n");
                                        return NOTIFY_BAD;
                                }
                                mlxsw_sp_master_bridge_inc(mlxsw_sp, upper_dev);
                        } else {
                                err = mlxsw_sp_port_bridge_leave(mlxsw_sp_port,
                                                                 true);
                                mlxsw_sp_master_bridge_dec(mlxsw_sp, upper_dev);
                                if (err) {
                                        netdev_err(dev, "Failed to leave bridge\n");
                                        return NOTIFY_BAD;
                                }
                        }
                } else if (netif_is_lag_master(upper_dev)) {
                        if (info->linking) {
                                err = mlxsw_sp_port_lag_join(mlxsw_sp_port,
                                                             upper_dev);
                                if (err) {
                                        netdev_err(dev, "Failed to join link aggregation\n");
                                        return NOTIFY_BAD;
                                }
                        } else {
                                err = mlxsw_sp_port_lag_leave(mlxsw_sp_port,
                                                              upper_dev);
                                if (err) {
                                        netdev_err(dev, "Failed to leave link aggregation\n");
                                        return NOTIFY_BAD;
                                }
                        }
                }
                break;
        }

        return NOTIFY_DONE;
}

static int mlxsw_sp_netdevice_port_lower_event(struct net_device *dev,
                                               unsigned long event, void *ptr)
{
        struct netdev_notifier_changelowerstate_info *info;
        struct mlxsw_sp_port *mlxsw_sp_port;
        int err;

        mlxsw_sp_port = netdev_priv(dev);
        info = ptr;

        switch (event) {
        case NETDEV_CHANGELOWERSTATE:
                if (netif_is_lag_port(dev) && mlxsw_sp_port->lagged) {
                        err = mlxsw_sp_port_lag_changed(mlxsw_sp_port,
                                                        info->lower_state_info);
                        if (err)
                                netdev_err(dev, "Failed to reflect link aggregation lower state change\n");
                }
                break;
        }

        return NOTIFY_DONE;
}

static int mlxsw_sp_netdevice_port_event(struct net_device *dev,
                                         unsigned long event, void *ptr)
{
        switch (event) {
        case NETDEV_PRECHANGEUPPER:
        case NETDEV_CHANGEUPPER:
                return mlxsw_sp_netdevice_port_upper_event(dev, event, ptr);
        case NETDEV_CHANGELOWERSTATE:
                return mlxsw_sp_netdevice_port_lower_event(dev, event, ptr);
        }

        return NOTIFY_DONE;
}

static int mlxsw_sp_netdevice_lag_event(struct net_device *lag_dev,
                                        unsigned long event, void *ptr)
{
        struct net_device *dev;
        struct list_head *iter;
        int ret;

        netdev_for_each_lower_dev(lag_dev, dev, iter) {
                if (mlxsw_sp_port_dev_check(dev)) {
                        ret = mlxsw_sp_netdevice_port_event(dev, event, ptr);
                        if (ret == NOTIFY_BAD)
                                return ret;
                }
        }

        return NOTIFY_DONE;
}

static struct mlxsw_sp_vfid *
mlxsw_sp_br_vfid_find(const struct mlxsw_sp *mlxsw_sp,
                      const struct net_device *br_dev)
{
        struct mlxsw_sp_vfid *vfid;

        list_for_each_entry(vfid, &mlxsw_sp->br_vfids.list, list) {
                if (vfid->br_dev == br_dev)
                        return vfid;
        }

        return NULL;
}

static u16 mlxsw_sp_vfid_to_br_vfid(u16 vfid)
{
        return vfid - MLXSW_SP_VFID_PORT_MAX;
}

static u16 mlxsw_sp_br_vfid_to_vfid(u16 br_vfid)
{
        return MLXSW_SP_VFID_PORT_MAX + br_vfid;
}

static u16 mlxsw_sp_avail_br_vfid_get(const struct mlxsw_sp *mlxsw_sp)
{
        return find_first_zero_bit(mlxsw_sp->br_vfids.mapped,
                                   MLXSW_SP_VFID_BR_MAX);
}

static struct mlxsw_sp_vfid *mlxsw_sp_br_vfid_create(struct mlxsw_sp *mlxsw_sp,
                                                     struct net_device *br_dev)
{
        struct device *dev = mlxsw_sp->bus_info->dev;
        struct mlxsw_sp_vfid *vfid;
        u16 n_vfid;
        int err;

        n_vfid = mlxsw_sp_br_vfid_to_vfid(mlxsw_sp_avail_br_vfid_get(mlxsw_sp));
        if (n_vfid == MLXSW_SP_VFID_MAX) {
                dev_err(dev, "No available vFIDs\n");
                return ERR_PTR(-ERANGE);
        }

        err = __mlxsw_sp_vfid_create(mlxsw_sp, n_vfid);
        if (err) {
                dev_err(dev, "Failed to create vFID=%d\n", n_vfid);
                return ERR_PTR(err);
        }

        vfid = kzalloc(sizeof(*vfid), GFP_KERNEL);
        if (!vfid)
                goto err_allocate_vfid;

        vfid->vfid = n_vfid;
        vfid->br_dev = br_dev;

        list_add(&vfid->list, &mlxsw_sp->br_vfids.list);
        set_bit(mlxsw_sp_vfid_to_br_vfid(n_vfid), mlxsw_sp->br_vfids.mapped);

        return vfid;

err_allocate_vfid:
        __mlxsw_sp_vfid_destroy(mlxsw_sp, n_vfid);
        return ERR_PTR(-ENOMEM);
}

static void mlxsw_sp_br_vfid_destroy(struct mlxsw_sp *mlxsw_sp,
                                     struct mlxsw_sp_vfid *vfid)
{
        u16 br_vfid = mlxsw_sp_vfid_to_br_vfid(vfid->vfid);

        clear_bit(br_vfid, mlxsw_sp->br_vfids.mapped);
        list_del(&vfid->list);

        __mlxsw_sp_vfid_destroy(mlxsw_sp, vfid->vfid);

        kfree(vfid);
}

static int mlxsw_sp_vport_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_vport,
                                       struct net_device *br_dev,
                                       bool flush_fdb)
{
        struct mlxsw_sp *mlxsw_sp = mlxsw_sp_vport->mlxsw_sp;
        u16 vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);
        struct net_device *dev = mlxsw_sp_vport->dev;
        struct mlxsw_sp_vfid *vfid, *new_vfid;
        int err;

        vfid = mlxsw_sp_br_vfid_find(mlxsw_sp, br_dev);
        if (!vfid) {
                WARN_ON(!vfid);
                return -EINVAL;
        }

        /* We need a vFID to go back to after leaving the bridge's vFID. */
        new_vfid = mlxsw_sp_vfid_find(mlxsw_sp, vid);
        if (!new_vfid) {
                new_vfid = mlxsw_sp_vfid_create(mlxsw_sp, vid);
                if (IS_ERR(new_vfid)) {
                        netdev_err(dev, "Failed to create vFID for VID=%d\n",
                                   vid);
                        return PTR_ERR(new_vfid);
                }
        }

        /* Invalidate existing {Port, VID} to vFID mapping and create a new
         * one for the new vFID.
         */
        err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
                                           MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
                                           false,
                                           mlxsw_sp_vfid_to_fid(vfid->vfid),
                                           vid);
        if (err) {
                netdev_err(dev, "Failed to invalidate {Port, VID} to vFID=%d mapping\n",
                           vfid->vfid);
                goto err_port_vid_to_fid_invalidate;
        }

        err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_vport,
                                           MLXSW_REG_SVFA_MT_PORT_VID_TO_FID,
                                           true,
                                           mlxsw_sp_vfid_to_fid(new_vfid->vfid),
                                           vid);
        if (err) {
                netdev_err(dev, "Failed to map {Port, VID} to vFID=%d\n",
                           new_vfid->vfid);
                goto err_port_vid_to_fid_validate;
        }

        err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_vport, vid, false);
        if (err) {
                netdev_err(dev, "Failed to disable learning\n");
                goto err_port_vid_learning_set;
        }

        err = mlxsw_sp_vport_flood_set(mlxsw_sp_vport, vfid->vfid, false,
                                       false);
        if (err) {
                netdev_err(dev, "Failed clear to clear flooding\n");
                goto err_vport_flood_set;
        }

        err = mlxsw_sp_port_stp_state_set(mlxsw_sp_vport, vid,
                                          MLXSW_REG_SPMS_STATE_FORWARDING);
        if (err) {
                netdev_err(dev, "Failed to set STP state\n");
                goto err_port_stp_state_set;
        }

        if (flush_fdb && mlxsw_sp_vport_fdb_flush(mlxsw_sp_vport))
                netdev_err(dev, "Failed to flush FDB\n");

        /* Switch between the vFIDs and destroy the old one if needed. */
        new_vfid->nr_vports++;
        mlxsw_sp_vport->vport.vfid = new_vfid;
        vfid->nr_vports--;
        if (!vfid->nr_vports)
                mlxsw_sp_br_vfid_destroy(mlxsw_sp, vfid);

        mlxsw_sp_vport->learning = 0;