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[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / mellanox / mlxsw / switchx2.c

/*
 * drivers/net/ethernet/mellanox/mlxsw/switchx2.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/slab.h>
#include <linux/device.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <net/switchdev.h>
#include <generated/utsrelease.h>

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

static const char mlxsw_sx_driver_name[] = "mlxsw_switchx2";
static const char mlxsw_sx_driver_version[] = "1.0";

struct mlxsw_sx_port;

#define MLXSW_SW_HW_ID_LEN 6

struct mlxsw_sx {
        struct mlxsw_sx_port **ports;
        struct mlxsw_core *core;
        const struct mlxsw_bus_info *bus_info;
        u8 hw_id[MLXSW_SW_HW_ID_LEN];
};

struct mlxsw_sx_port_pcpu_stats {
        u64                     rx_packets;
        u64                     rx_bytes;
        u64                     tx_packets;
        u64                     tx_bytes;
        struct u64_stats_sync   syncp;
        u32                     tx_dropped;
};

struct mlxsw_sx_port {
        struct net_device *dev;
        struct mlxsw_sx_port_pcpu_stats __percpu *pcpu_stats;
        struct mlxsw_sx *mlxsw_sx;
        u8 local_port;
};

/* tx_hdr_version
 * Tx header version.
 * Must be set to 0.
 */
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_etclass
 * Egress TClass to be used on the egress device on the egress port.
 * The MSB is specified in the 'ctclass3' field.
 * Range is 0-15, where 15 is the highest priority.
 */
MLXSW_ITEM32(tx, hdr, etclass, 0x00, 18, 3);

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

/* 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_ctclass3
 * See field 'etclass'.
 */
MLXSW_ITEM32(tx, hdr, ctclass3, 0x04, 14, 1);

/* tx_hdr_rdq
 * RDQ for control packets sent to remote CPU.
 * Must be set to 0x1F for EMADs, otherwise 0.
 */
MLXSW_ITEM32(tx, hdr, rdq, 0x04, 9, 5);

/* tx_hdr_cpu_sig
 * Signature control for packets going to CPU. Must be set to 0.
 */
MLXSW_ITEM32(tx, hdr, cpu_sig, 0x04, 0, 9);

/* tx_hdr_sig
 * Stacking protocl signature. Must be set to 0xE0E0.
 */
MLXSW_ITEM32(tx, hdr, sig, 0x0C, 16, 16);

/* tx_hdr_stclass
 * Stacking TClass.
 */
MLXSW_ITEM32(tx, hdr, stclass, 0x0C, 13, 3);

/* tx_hdr_emad
 * EMAD bit. Must be set for EMADs.
 */
MLXSW_ITEM32(tx, hdr, emad, 0x0C, 5, 1);

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

static void mlxsw_sx_txhdr_construct(struct sk_buff *skb,
                                     const struct mlxsw_tx_info *tx_info)
{
        char *txhdr = skb_push(skb, MLXSW_TXHDR_LEN);
        bool is_emad = tx_info->is_emad;

        memset(txhdr, 0, MLXSW_TXHDR_LEN);

        /* We currently set default values for the egress tclass (QoS). */
        mlxsw_tx_hdr_version_set(txhdr, MLXSW_TXHDR_VERSION_0);
        mlxsw_tx_hdr_ctl_set(txhdr, MLXSW_TXHDR_ETH_CTL);
        mlxsw_tx_hdr_proto_set(txhdr, MLXSW_TXHDR_PROTO_ETH);
        mlxsw_tx_hdr_etclass_set(txhdr, is_emad ? MLXSW_TXHDR_ETCLASS_6 :
                                                  MLXSW_TXHDR_ETCLASS_5);
        mlxsw_tx_hdr_swid_set(txhdr, 0);
        mlxsw_tx_hdr_port_mid_set(txhdr, tx_info->local_port);
        mlxsw_tx_hdr_ctclass3_set(txhdr, MLXSW_TXHDR_CTCLASS3);
        mlxsw_tx_hdr_rdq_set(txhdr, is_emad ? MLXSW_TXHDR_RDQ_EMAD :
                                              MLXSW_TXHDR_RDQ_OTHER);
        mlxsw_tx_hdr_cpu_sig_set(txhdr, MLXSW_TXHDR_CPU_SIG);
        mlxsw_tx_hdr_sig_set(txhdr, MLXSW_TXHDR_SIG);
        mlxsw_tx_hdr_stclass_set(txhdr, MLXSW_TXHDR_STCLASS_NONE);
        mlxsw_tx_hdr_emad_set(txhdr, is_emad ? MLXSW_TXHDR_EMAD :
                                               MLXSW_TXHDR_NOT_EMAD);
        mlxsw_tx_hdr_type_set(txhdr, MLXSW_TXHDR_TYPE_CONTROL);
}

static int mlxsw_sx_port_admin_status_set(struct mlxsw_sx_port *mlxsw_sx_port,
                                          bool is_up)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        char paos_pl[MLXSW_REG_PAOS_LEN];

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

static int mlxsw_sx_port_oper_status_get(struct mlxsw_sx_port *mlxsw_sx_port,
                                         bool *p_is_up)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        char paos_pl[MLXSW_REG_PAOS_LEN];
        u8 oper_status;
        int err;

        mlxsw_reg_paos_pack(paos_pl, mlxsw_sx_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sx->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_sx_port_mtu_set(struct mlxsw_sx_port *mlxsw_sx_port, u16 mtu)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        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_sx_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sx->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_sx_port->local_port, mtu);
        return mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(pmtu), pmtu_pl);
}

static int mlxsw_sx_port_swid_set(struct mlxsw_sx_port *mlxsw_sx_port, u8 swid)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        char pspa_pl[MLXSW_REG_PSPA_LEN];

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

static int
mlxsw_sx_port_system_port_mapping_set(struct mlxsw_sx_port *mlxsw_sx_port)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        char sspr_pl[MLXSW_REG_SSPR_LEN];

        mlxsw_reg_sspr_pack(sspr_pl, mlxsw_sx_port->local_port);
        return mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sspr), sspr_pl);
}

static int mlxsw_sx_port_module_check(struct mlxsw_sx_port *mlxsw_sx_port,
                                      bool *p_usable)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        char pmlp_pl[MLXSW_REG_PMLP_LEN];
        int err;

        mlxsw_reg_pmlp_pack(pmlp_pl, mlxsw_sx_port->local_port);
        err = mlxsw_reg_query(mlxsw_sx->core, MLXSW_REG(pmlp), pmlp_pl);
        if (err)
                return err;
        *p_usable = mlxsw_reg_pmlp_width_get(pmlp_pl) ? true : false;
        return 0;
}

static int mlxsw_sx_port_open(struct net_device *dev)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        int err;

        err = mlxsw_sx_port_admin_status_set(mlxsw_sx_port, true);
        if (err)
                return err;
        netif_start_queue(dev);
        return 0;
}

static int mlxsw_sx_port_stop(struct net_device *dev)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);

        netif_stop_queue(dev);
        return mlxsw_sx_port_admin_status_set(mlxsw_sx_port, false);
}

static netdev_tx_t mlxsw_sx_port_xmit(struct sk_buff *skb,
                                      struct net_device *dev)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        struct mlxsw_sx_port_pcpu_stats *pcpu_stats;
        const struct mlxsw_tx_info tx_info = {
                .local_port = mlxsw_sx_port->local_port,
                .is_emad = false,
        };
        u64 len;
        int err;

        if (mlxsw_core_skb_transmit_busy(mlxsw_sx, &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_sx_port->pcpu_stats->tx_dropped);
                        dev_kfree_skb_any(skb_orig);
                        return NETDEV_TX_OK;
                }
        }
        mlxsw_sx_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_sx, skb, &tx_info);

        if (!err) {
                pcpu_stats = this_cpu_ptr(mlxsw_sx_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_sx_port->pcpu_stats->tx_dropped);
                dev_kfree_skb_any(skb);
        }
        return NETDEV_TX_OK;
}

static int mlxsw_sx_port_change_mtu(struct net_device *dev, int mtu)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        int err;

        err = mlxsw_sx_port_mtu_set(mlxsw_sx_port, mtu);
        if (err)
                return err;
        dev->mtu = mtu;
        return 0;
}

static struct rtnl_link_stats64 *
mlxsw_sx_port_get_stats64(struct net_device *dev,
                          struct rtnl_link_stats64 *stats)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        struct mlxsw_sx_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_sx_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;
}

static const struct net_device_ops mlxsw_sx_port_netdev_ops = {
        .ndo_open               = mlxsw_sx_port_open,
        .ndo_stop               = mlxsw_sx_port_stop,
        .ndo_start_xmit         = mlxsw_sx_port_xmit,
        .ndo_change_mtu         = mlxsw_sx_port_change_mtu,
        .ndo_get_stats64        = mlxsw_sx_port_get_stats64,
};

static void mlxsw_sx_port_get_drvinfo(struct net_device *dev,
                                      struct ethtool_drvinfo *drvinfo)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;

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

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

static const struct mlxsw_sx_port_hw_stats mlxsw_sx_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_SX_PORT_HW_STATS_LEN ARRAY_SIZE(mlxsw_sx_port_hw_stats)

static void mlxsw_sx_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_SX_PORT_HW_STATS_LEN; i++) {
                        memcpy(p, mlxsw_sx_port_hw_stats[i].str,
                               ETH_GSTRING_LEN);
                        p += ETH_GSTRING_LEN;
                }
                break;
        }
}

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

        mlxsw_reg_ppcnt_pack(ppcnt_pl, mlxsw_sx_port->local_port);
        err = mlxsw_reg_query(mlxsw_sx->core, MLXSW_REG(ppcnt), ppcnt_pl);
        for (i = 0; i < MLXSW_SX_PORT_HW_STATS_LEN; i++)
                data[i] = !err ? mlxsw_sx_port_hw_stats[i].getter(ppcnt_pl) : 0;
}

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

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

static const struct mlxsw_sx_port_link_mode mlxsw_sx_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_SX_PORT_LINK_MODE_LEN ARRAY_SIZE(mlxsw_sx_port_link_mode)

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

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

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

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

static void mlxsw_sx_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_SX_PORT_LINK_MODE_LEN; i++) {
                if (ptys_eth_proto & mlxsw_sx_port_link_mode[i].mask) {
                        speed = mlxsw_sx_port_link_mode[i].speed;
                        duplex = DUPLEX_FULL;
                        break;
                }
        }
out:
        ethtool_cmd_speed_set(cmd, speed);
        cmd->duplex = duplex;
}

static u8 mlxsw_sx_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_sx_port_get_settings(struct net_device *dev,
                                      struct ethtool_cmd *cmd)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        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_sx_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sx->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_sx_from_ptys_supported_port(eth_proto_cap) |
                         mlxsw_sx_from_ptys_supported_link(eth_proto_cap) |
                         SUPPORTED_Pause | SUPPORTED_Asym_Pause;
        cmd->advertising = mlxsw_sx_from_ptys_advert_link(eth_proto_admin);
        mlxsw_sx_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_sx_port_connector_port(eth_proto_oper);
        cmd->lp_advertising = mlxsw_sx_from_ptys_advert_link(eth_proto_oper);

        cmd->transceiver = XCVR_INTERNAL;
        return 0;
}

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

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

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

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

static int mlxsw_sx_port_set_settings(struct net_device *dev,
                                      struct ethtool_cmd *cmd)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        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_sx_to_ptys_advert_link(cmd->advertising) :
                mlxsw_sx_to_ptys_speed(speed);

        mlxsw_reg_ptys_pack(ptys_pl, mlxsw_sx_port->local_port, 0);
        err = mlxsw_reg_query(mlxsw_sx->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_sx_port->local_port, eth_proto_new);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(ptys), ptys_pl);
        if (err) {
                netdev_err(dev, "Failed to set proto admin");
                return err;
        }

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

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

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

        return 0;
}

static const struct ethtool_ops mlxsw_sx_port_ethtool_ops = {
        .get_drvinfo            = mlxsw_sx_port_get_drvinfo,
        .get_link               = ethtool_op_get_link,
        .get_strings            = mlxsw_sx_port_get_strings,
        .get_ethtool_stats      = mlxsw_sx_port_get_stats,
        .get_sset_count         = mlxsw_sx_port_get_sset_count,
        .get_settings           = mlxsw_sx_port_get_settings,
        .set_settings           = mlxsw_sx_port_set_settings,
};

static int mlxsw_sx_port_attr_get(struct net_device *dev,
                                  struct switchdev_attr *attr)
{
        struct mlxsw_sx_port *mlxsw_sx_port = netdev_priv(dev);
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;

        switch (attr->id) {
        case SWITCHDEV_ATTR_PORT_PARENT_ID:
                attr->u.ppid.id_len = sizeof(mlxsw_sx->hw_id);
                memcpy(&attr->u.ppid.id, &mlxsw_sx->hw_id, attr->u.ppid.id_len);
                break;
        default:
                return -EOPNOTSUPP;
        }

        return 0;
}

static const struct switchdev_ops mlxsw_sx_port_switchdev_ops = {
        .switchdev_port_attr_get        = mlxsw_sx_port_attr_get,
};

static int mlxsw_sx_hw_id_get(struct mlxsw_sx *mlxsw_sx)
{
        char spad_pl[MLXSW_REG_SPAD_LEN];
        int err;

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

static int mlxsw_sx_port_dev_addr_get(struct mlxsw_sx_port *mlxsw_sx_port)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        struct net_device *dev = mlxsw_sx_port->dev;
        char ppad_pl[MLXSW_REG_PPAD_LEN];
        int err;

        mlxsw_reg_ppad_pack(ppad_pl, false, 0);
        err = mlxsw_reg_query(mlxsw_sx->core, MLXSW_REG(ppad), ppad_pl);
        if (err)
                return err;
        mlxsw_reg_ppad_mac_memcpy_from(ppad_pl, dev->dev_addr);
        /* The last byte value in base mac address is guaranteed
         * to be such it does not overflow when adding local_port
         * value.
         */
        dev->dev_addr[ETH_ALEN - 1] += mlxsw_sx_port->local_port;
        return 0;
}

static int mlxsw_sx_port_stp_state_set(struct mlxsw_sx_port *mlxsw_sx_port,
                                       u16 vid, enum mlxsw_reg_spms_state state)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        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_sx_port->local_port, vid, state);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(spms), spms_pl);
        kfree(spms_pl);
        return err;
}

static int mlxsw_sx_port_speed_set(struct mlxsw_sx_port *mlxsw_sx_port,
                                   u32 speed)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        char ptys_pl[MLXSW_REG_PTYS_LEN];

        mlxsw_reg_ptys_pack(ptys_pl, mlxsw_sx_port->local_port, speed);
        return mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(ptys), ptys_pl);
}

static int
mlxsw_sx_port_mac_learning_mode_set(struct mlxsw_sx_port *mlxsw_sx_port,
                                    enum mlxsw_reg_spmlr_learn_mode mode)
{
        struct mlxsw_sx *mlxsw_sx = mlxsw_sx_port->mlxsw_sx;
        char spmlr_pl[MLXSW_REG_SPMLR_LEN];

        mlxsw_reg_spmlr_pack(spmlr_pl, mlxsw_sx_port->local_port, mode);
        return mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(spmlr), spmlr_pl);
}

static int mlxsw_sx_port_create(struct mlxsw_sx *mlxsw_sx, u8 local_port)
{
        struct mlxsw_sx_port *mlxsw_sx_port;
        struct net_device *dev;
        bool usable;
        int err;

        dev = alloc_etherdev(sizeof(struct mlxsw_sx_port));
        if (!dev)
                return -ENOMEM;
        mlxsw_sx_port = netdev_priv(dev);
        mlxsw_sx_port->dev = dev;
        mlxsw_sx_port->mlxsw_sx = mlxsw_sx;
        mlxsw_sx_port->local_port = local_port;

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

        dev->netdev_ops = &mlxsw_sx_port_netdev_ops;
        dev->ethtool_ops = &mlxsw_sx_port_ethtool_ops;
        dev->switchdev_ops = &mlxsw_sx_port_switchdev_ops;

        err = mlxsw_sx_port_dev_addr_get(mlxsw_sx_port);
        if (err) {
                dev_err(mlxsw_sx->bus_info->dev, "Port %d: Unable to get port mac address\n",
                        mlxsw_sx_port->local_port);
                goto err_dev_addr_get;
        }

        netif_carrier_off(dev);

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

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

        err = mlxsw_sx_port_module_check(mlxsw_sx_port, &usable);
        if (err) {
                dev_err(mlxsw_sx->bus_info->dev, "Port %d: Failed to check module\n",
                        mlxsw_sx_port->local_port);
                goto err_port_module_check;
        }

        if (!usable) {
                dev_dbg(mlxsw_sx->bus_info->dev, "Port %d: Not usable, skipping initialization\n",
                        mlxsw_sx_port->local_port);
                goto port_not_usable;
        }

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

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

        err = mlxsw_sx_port_speed_set(mlxsw_sx_port,
                                      MLXSW_REG_PTYS_ETH_SPEED_40GBASE_CR4);
        if (err) {
                dev_err(mlxsw_sx->bus_info->dev, "Port %d: Failed to set speed\n",
                        mlxsw_sx_port->local_port);
                goto err_port_speed_set;
        }

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

        err = mlxsw_sx_port_admin_status_set(mlxsw_sx_port, false);
        if (err)
                goto err_port_admin_status_set;

        err = mlxsw_sx_port_stp_state_set(mlxsw_sx_port,
                                          MLXSW_PORT_DEFAULT_VID,
                                          MLXSW_REG_SPMS_STATE_FORWARDING);
        if (err) {
                dev_err(mlxsw_sx->bus_info->dev, "Port %d: Failed to set STP state\n",
                        mlxsw_sx_port->local_port);
                goto err_port_stp_state_set;
        }

        err = mlxsw_sx_port_mac_learning_mode_set(mlxsw_sx_port,
                                                  MLXSW_REG_SPMLR_LEARN_MODE_DISABLE);
        if (err) {
                dev_err(mlxsw_sx->bus_info->dev, "Port %d: Failed to set MAC learning mode\n",
                        mlxsw_sx_port->local_port);
                goto err_port_mac_learning_mode_set;
        }

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

        mlxsw_sx->ports[local_port] = mlxsw_sx_port;
        return 0;

err_register_netdev:
err_port_admin_status_set:
err_port_mac_learning_mode_set:
err_port_stp_state_set:
err_port_mtu_set:
err_port_speed_set:
err_port_swid_set:
err_port_system_port_mapping_set:
port_not_usable:
err_port_module_check:
err_dev_addr_get:
        free_percpu(mlxsw_sx_port->pcpu_stats);
err_alloc_stats:
        free_netdev(dev);
        return err;
}

static void mlxsw_sx_port_remove(struct mlxsw_sx *mlxsw_sx, u8 local_port)
{
        struct mlxsw_sx_port *mlxsw_sx_port = mlxsw_sx->ports[local_port];

        if (!mlxsw_sx_port)
                return;
        unregister_netdev(mlxsw_sx_port->dev); /* This calls ndo_stop */
        mlxsw_sx_port_swid_set(mlxsw_sx_port, MLXSW_PORT_SWID_DISABLED_PORT);
        free_percpu(mlxsw_sx_port->pcpu_stats);
        free_netdev(mlxsw_sx_port->dev);
}

static void mlxsw_sx_ports_remove(struct mlxsw_sx *mlxsw_sx)
{
        int i;

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

static int mlxsw_sx_ports_create(struct mlxsw_sx *mlxsw_sx)
{
        size_t alloc_size;
        int i;
        int err;

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

        for (i = 1; i < MLXSW_PORT_MAX_PORTS; i++) {
                err = mlxsw_sx_port_create(mlxsw_sx, i);
                if (err)
                        goto err_port_create;
        }
        return 0;

err_port_create:
        for (i--; i >= 1; i--)
                mlxsw_sx_port_remove(mlxsw_sx, i);
        kfree(mlxsw_sx->ports);
        return err;
}

static void mlxsw_sx_pude_event_func(const struct mlxsw_reg_info *reg,
                                     char *pude_pl, void *priv)
{
        struct mlxsw_sx *mlxsw_sx = priv;
        struct mlxsw_sx_port *mlxsw_sx_port;
        enum mlxsw_reg_pude_oper_status status;
        u8 local_port;

        local_port = mlxsw_reg_pude_local_port_get(pude_pl);
        mlxsw_sx_port = mlxsw_sx->ports[local_port];
        if (!mlxsw_sx_port) {
                dev_warn(mlxsw_sx->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 (MLXSW_PORT_OPER_STATUS_UP == status) {
                netdev_info(mlxsw_sx_port->dev, "link up\n");
                netif_carrier_on(mlxsw_sx_port->dev);
        } else {
                netdev_info(mlxsw_sx_port->dev, "link down\n");
                netif_carrier_off(mlxsw_sx_port->dev);
        }
}

static struct mlxsw_event_listener mlxsw_sx_pude_event = {
        .func = mlxsw_sx_pude_event_func,
        .trap_id = MLXSW_TRAP_ID_PUDE,
};

static int mlxsw_sx_event_register(struct mlxsw_sx *mlxsw_sx,
                                   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_sx_pude_event;
                break;
        }
        err = mlxsw_core_event_listener_register(mlxsw_sx->core, el, mlxsw_sx);
        if (err)
                return err;

        mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_FORWARD,
                            MLXSW_REG_HTGT_TRAP_GROUP_EMAD, trap_id);
        err = mlxsw_reg_write(mlxsw_sx->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_sx->core, el, mlxsw_sx);
        return err;
}

static void mlxsw_sx_event_unregister(struct mlxsw_sx *mlxsw_sx,
                                      enum mlxsw_event_trap_id trap_id)
{
        struct mlxsw_event_listener *el;

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

static void mlxsw_sx_rx_listener_func(struct sk_buff *skb, u8 local_port,
                                      void *priv)
{
        struct mlxsw_sx *mlxsw_sx = priv;
        struct mlxsw_sx_port *mlxsw_sx_port = mlxsw_sx->ports[local_port];
        struct mlxsw_sx_port_pcpu_stats *pcpu_stats;

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

        skb->dev = mlxsw_sx_port->dev;

        pcpu_stats = this_cpu_ptr(mlxsw_sx_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_sx_rx_listener[] = {
        {
                .func = mlxsw_sx_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_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_STP,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_LACP,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_EAPOL,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_LLDP,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_MMRP,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_MVRP,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_RPVST,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_DHCP,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_QUERY,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V1_REPORT,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V2_REPORT,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V2_LEAVE,
        },
        {
                .func = mlxsw_sx_rx_listener_func,
                .local_port = MLXSW_PORT_DONT_CARE,
                .trap_id = MLXSW_TRAP_ID_IGMP_V3_REPORT,
        },
};

static int mlxsw_sx_traps_init(struct mlxsw_sx *mlxsw_sx)
{
        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_sx->core, MLXSW_REG(htgt), htgt_pl);
        if (err)
                return err;

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

                mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_TRAP_TO_CPU,
                                    MLXSW_REG_HTGT_TRAP_GROUP_RX,
                                    mlxsw_sx_rx_listener[i].trap_id);
                err = mlxsw_reg_write(mlxsw_sx->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_sx->core,
                                          &mlxsw_sx_rx_listener[i],
                                          mlxsw_sx);
err_rx_listener_register:
        for (i--; i >= 0; i--) {
                mlxsw_reg_hpkt_pack(hpkt_pl, MLXSW_REG_HPKT_ACTION_FORWARD,
                                    MLXSW_REG_HTGT_TRAP_GROUP_RX,
                                    mlxsw_sx_rx_listener[i].trap_id);
                mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(hpkt), hpkt_pl);

                mlxsw_core_rx_listener_unregister(mlxsw_sx->core,
                                                  &mlxsw_sx_rx_listener[i],
                                                  mlxsw_sx);
        }
        return err;
}

static void mlxsw_sx_traps_fini(struct mlxsw_sx *mlxsw_sx)
{
        char hpkt_pl[MLXSW_REG_HPKT_LEN];
        int i;

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

                mlxsw_core_rx_listener_unregister(mlxsw_sx->core,
                                                  &mlxsw_sx_rx_listener[i],
                                                  mlxsw_sx);
        }
}

static int mlxsw_sx_flood_init(struct mlxsw_sx *mlxsw_sx)
{
        char sfgc_pl[MLXSW_REG_SFGC_LEN];
        char sgcr_pl[MLXSW_REG_SGCR_LEN];
        char *smid_pl;
        char *sftr_pl;
        int err;

        /* Due to FW bug, we must configure SMID. */
        smid_pl = kmalloc(MLXSW_REG_SMID_LEN, GFP_KERNEL);
        if (!smid_pl)
                return -ENOMEM;
        mlxsw_reg_smid_pack(smid_pl, MLXSW_PORT_MID);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(smid), smid_pl);
        kfree(smid_pl);
        if (err)
                return err;

        /* Configure a flooding table, which includes only CPU port. */
        sftr_pl = kmalloc(MLXSW_REG_SFTR_LEN, GFP_KERNEL);
        if (!sftr_pl)
                return -ENOMEM;
        mlxsw_reg_sftr_pack(sftr_pl, 0, 0, MLXSW_REG_SFGC_TABLE_TYPE_SINGLE, 0);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sftr), sftr_pl);
        kfree(sftr_pl);
        if (err)
                return err;

        /* Flood different packet types using the flooding table. */
        mlxsw_reg_sfgc_pack(sfgc_pl,
                            MLXSW_REG_SFGC_TYPE_UNKNOWN_UNICAST,
                            MLXSW_REG_SFGC_BRIDGE_TYPE_1Q_FID,
                            MLXSW_REG_SFGC_TABLE_TYPE_SINGLE,
                            0);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sfgc), sfgc_pl);
        if (err)
                return err;

        mlxsw_reg_sfgc_pack(sfgc_pl,
                            MLXSW_REG_SFGC_TYPE_BROADCAST,
                            MLXSW_REG_SFGC_BRIDGE_TYPE_1Q_FID,
                            MLXSW_REG_SFGC_TABLE_TYPE_SINGLE,
                            0);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sfgc), sfgc_pl);
        if (err)
                return err;

        mlxsw_reg_sfgc_pack(sfgc_pl,
                            MLXSW_REG_SFGC_TYPE_UNREGISTERED_MULTICAST_NON_IP,
                            MLXSW_REG_SFGC_BRIDGE_TYPE_1Q_FID,
                            MLXSW_REG_SFGC_TABLE_TYPE_SINGLE,
                            0);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sfgc), sfgc_pl);
        if (err)
                return err;

        mlxsw_reg_sfgc_pack(sfgc_pl,
                            MLXSW_REG_SFGC_TYPE_UNREGISTERED_MULTICAST_IPV6,
                            MLXSW_REG_SFGC_BRIDGE_TYPE_1Q_FID,
                            MLXSW_REG_SFGC_TABLE_TYPE_SINGLE,
                            0);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sfgc), sfgc_pl);
        if (err)
                return err;

        mlxsw_reg_sfgc_pack(sfgc_pl,
                            MLXSW_REG_SFGC_TYPE_UNREGISTERED_MULTICAST_IPV4,
                            MLXSW_REG_SFGC_BRIDGE_TYPE_1Q_FID,
                            MLXSW_REG_SFGC_TABLE_TYPE_SINGLE,
                            0);
        err = mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sfgc), sfgc_pl);
        if (err)
                return err;

        mlxsw_reg_sgcr_pack(sgcr_pl, true);
        return mlxsw_reg_write(mlxsw_sx->core, MLXSW_REG(sgcr), sgcr_pl);
}

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

        mlxsw_sx->core = mlxsw_core;
        mlxsw_sx->bus_info = mlxsw_bus_info;

        err = mlxsw_sx_hw_id_get(mlxsw_sx);
        if (err) {
                dev_err(mlxsw_sx->bus_info->dev, "Failed to get switch HW ID\n");
                return err;
        }

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

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

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

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

        return 0;

err_flood_init:
        mlxsw_sx_traps_fini(mlxsw_sx);
err_rx_listener_register:
        mlxsw_sx_event_unregister(mlxsw_sx, MLXSW_TRAP_ID_PUDE);
err_event_register:
        mlxsw_sx_ports_remove(mlxsw_sx);
        return err;
}

static void mlxsw_sx_fini(void *priv)
{
        struct mlxsw_sx *mlxsw_sx = priv;

        mlxsw_sx_traps_fini(mlxsw_sx);
        mlxsw_sx_event_unregister(mlxsw_sx, MLXSW_TRAP_ID_PUDE);
        mlxsw_sx_ports_remove(mlxsw_sx);
}

static struct mlxsw_config_profile mlxsw_sx_config_profile = {
        .used_max_vepa_channels         = 1,
        .max_vepa_channels              = 0,
        .used_max_lag                   = 1,
        .max_lag                        = 64,
        .used_max_port_per_lag          = 1,
        .max_port_per_lag               = 16,
        .used_max_mid                   = 1,
        .max_mid                        = 7000,
        .used_max_pgt                   = 1,
        .max_pgt                        = 0,
        .used_max_system_port           = 1,
        .max_system_port                = 48000,
        .used_max_vlan_groups           = 1,
        .max_vlan_groups                = 127,
        .used_max_regions               = 1,
        .max_regions                    = 400,
        .used_flood_tables              = 1,
        .max_flood_tables               = 2,
        .max_vid_flood_tables           = 1,
        .used_flood_mode                = 1,
        .flood_mode                     = 3,
        .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_sx_driver = {
        .kind                   = MLXSW_DEVICE_KIND_SWITCHX2,
        .owner                  = THIS_MODULE,
        .priv_size              = sizeof(struct mlxsw_sx),
        .init                   = mlxsw_sx_init,
        .fini                   = mlxsw_sx_fini,
        .txhdr_construct        = mlxsw_sx_txhdr_construct,
        .txhdr_len              = MLXSW_TXHDR_LEN,
        .profile                = &mlxsw_sx_config_profile,
};

static int __init mlxsw_sx_module_init(void)
{
        return mlxsw_core_driver_register(&mlxsw_sx_driver);
}

static void __exit mlxsw_sx_module_exit(void)
{
        mlxsw_core_driver_unregister(&mlxsw_sx_driver);
}

module_init(mlxsw_sx_module_init);
module_exit(mlxsw_sx_module_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Mellanox SwitchX-2 driver");
MODULE_MLXSW_DRIVER_ALIAS(MLXSW_DEVICE_KIND_SWITCHX2);