// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2016-2019 Mellanox Technologies. All rights reserved */

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/types.h>

#include "core.h"
#include "core_env.h"
#include "i2c.h"

static const char mlxsw_m_driver_name[] = "mlxsw_minimal";

#define MLXSW_M_FWREV_MINOR     2000
#define MLXSW_M_FWREV_SUBMINOR  1886

static const struct mlxsw_fw_rev mlxsw_m_fw_rev = {
        .minor = MLXSW_M_FWREV_MINOR,
        .subminor = MLXSW_M_FWREV_SUBMINOR,
};

struct mlxsw_m_port;

struct mlxsw_m_line_card {
        bool active;
        int module_to_port[];
};

struct mlxsw_m {
        struct mlxsw_m_port **ports;
        struct mlxsw_core *core;
        const struct mlxsw_bus_info *bus_info;
        u8 base_mac[ETH_ALEN];
        u8 max_ports;
        u8 max_modules_per_slot; /* Maximum number of modules per-slot. */
        u8 num_of_slots; /* Including the main board. */
        struct mlxsw_m_line_card **line_cards;
};

struct mlxsw_m_port {
        struct net_device *dev;
        struct mlxsw_m *mlxsw_m;
        u16 local_port;
        u8 slot_index;
        u8 module;
        u8 module_offset;
};

static int mlxsw_m_base_mac_get(struct mlxsw_m *mlxsw_m)
{
        char spad_pl[MLXSW_REG_SPAD_LEN] = {0};
        int err;

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

static int mlxsw_m_port_open(struct net_device *dev)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
        struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;

        return mlxsw_env_module_port_up(mlxsw_m->core, 0,
                                        mlxsw_m_port->module);
}

static int mlxsw_m_port_stop(struct net_device *dev)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
        struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;

        mlxsw_env_module_port_down(mlxsw_m->core, 0, mlxsw_m_port->module);
        return 0;
}

static const struct net_device_ops mlxsw_m_port_netdev_ops = {
        .ndo_open               = mlxsw_m_port_open,
        .ndo_stop               = mlxsw_m_port_stop,
};

static void mlxsw_m_module_get_drvinfo(struct net_device *dev,
                                       struct ethtool_drvinfo *drvinfo)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
        struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;

        strscpy(drvinfo->driver, mlxsw_m->bus_info->device_kind,
                sizeof(drvinfo->driver));
        snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
                 "%d.%d.%d",
                 mlxsw_m->bus_info->fw_rev.major,
                 mlxsw_m->bus_info->fw_rev.minor,
                 mlxsw_m->bus_info->fw_rev.subminor);
        strscpy(drvinfo->bus_info, mlxsw_m->bus_info->device_name,
                sizeof(drvinfo->bus_info));
}

static int mlxsw_m_get_module_info(struct net_device *netdev,
                                   struct ethtool_modinfo *modinfo)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
        struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;

        return mlxsw_env_get_module_info(netdev, core,
                                         mlxsw_m_port->slot_index,
                                         mlxsw_m_port->module, modinfo);
}

static int
mlxsw_m_get_module_eeprom(struct net_device *netdev, struct ethtool_eeprom *ee,
                          u8 *data)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
        struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;

        return mlxsw_env_get_module_eeprom(netdev, core,
                                           mlxsw_m_port->slot_index,
                                           mlxsw_m_port->module, ee, data);
}

static int
mlxsw_m_get_module_eeprom_by_page(struct net_device *netdev,
                                  const struct ethtool_module_eeprom *page,
                                  struct netlink_ext_ack *extack)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
        struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;

        return mlxsw_env_get_module_eeprom_by_page(core,
                                                   mlxsw_m_port->slot_index,
                                                   mlxsw_m_port->module,
                                                   page, extack);
}

static int
mlxsw_m_set_module_eeprom_by_page(struct net_device *netdev,
                                  const struct ethtool_module_eeprom *page,
                                  struct netlink_ext_ack *extack)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
        struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;

        return mlxsw_env_set_module_eeprom_by_page(core,
                                                   mlxsw_m_port->slot_index,
                                                   mlxsw_m_port->module,
                                                   page, extack);
}

static int mlxsw_m_reset(struct net_device *netdev, u32 *flags)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
        struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;

        return mlxsw_env_reset_module(netdev, core, mlxsw_m_port->slot_index,
                                      mlxsw_m_port->module,
                                      flags);
}

static int
mlxsw_m_get_module_power_mode(struct net_device *netdev,
                              struct ethtool_module_power_mode_params *params,
                              struct netlink_ext_ack *extack)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
        struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;

        return mlxsw_env_get_module_power_mode(core, mlxsw_m_port->slot_index,
                                               mlxsw_m_port->module,
                                               params, extack);
}

static int
mlxsw_m_set_module_power_mode(struct net_device *netdev,
                              const struct ethtool_module_power_mode_params *params,
                              struct netlink_ext_ack *extack)
{
        struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
        struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;

        return mlxsw_env_set_module_power_mode(core, mlxsw_m_port->slot_index,
                                               mlxsw_m_port->module,
                                               params->policy, extack);
}

static const struct ethtool_ops mlxsw_m_port_ethtool_ops = {
        .get_drvinfo            = mlxsw_m_module_get_drvinfo,
        .get_module_info        = mlxsw_m_get_module_info,
        .get_module_eeprom      = mlxsw_m_get_module_eeprom,
        .get_module_eeprom_by_page = mlxsw_m_get_module_eeprom_by_page,
        .set_module_eeprom_by_page = mlxsw_m_set_module_eeprom_by_page,
        .reset                  = mlxsw_m_reset,
        .get_module_power_mode  = mlxsw_m_get_module_power_mode,
        .set_module_power_mode  = mlxsw_m_set_module_power_mode,
};

static int
mlxsw_m_port_module_info_get(struct mlxsw_m *mlxsw_m, u16 local_port,
                             u8 *p_module, u8 *p_width, u8 *p_slot_index)
{
        char pmlp_pl[MLXSW_REG_PMLP_LEN];
        int err;

        mlxsw_reg_pmlp_pack(pmlp_pl, local_port);
        err = mlxsw_reg_query(mlxsw_m->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);
        *p_slot_index = mlxsw_reg_pmlp_slot_index_get(pmlp_pl, 0);

        return 0;
}

static int
mlxsw_m_port_dev_addr_get(struct mlxsw_m_port *mlxsw_m_port)
{
        struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
        char ppad_pl[MLXSW_REG_PPAD_LEN];
        u8 addr[ETH_ALEN];
        int err;

        mlxsw_reg_ppad_pack(ppad_pl, false, 0);
        err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(ppad), ppad_pl);
        if (err)
                return err;
        mlxsw_reg_ppad_mac_memcpy_from(ppad_pl, addr);
        eth_hw_addr_gen(mlxsw_m_port->dev, addr, mlxsw_m_port->module + 1 +
                        mlxsw_m_port->module_offset);
        return 0;
}

static bool mlxsw_m_port_created(struct mlxsw_m *mlxsw_m, u16 local_port)
{
        return mlxsw_m->ports[local_port];
}

static int
mlxsw_m_port_create(struct mlxsw_m *mlxsw_m, u16 local_port, u8 slot_index,
                    u8 module)
{
        struct mlxsw_m_port *mlxsw_m_port;
        struct net_device *dev;
        int err;

        err = mlxsw_core_port_init(mlxsw_m->core, local_port, slot_index,
                                   module + 1, false, 0, false,
                                   0, mlxsw_m->base_mac,
                                   sizeof(mlxsw_m->base_mac));
        if (err) {
                dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to init core port\n",
                        local_port);
                return err;
        }

        dev = alloc_etherdev(sizeof(struct mlxsw_m_port));
        if (!dev) {
                err = -ENOMEM;
                goto err_alloc_etherdev;
        }

        SET_NETDEV_DEV(dev, mlxsw_m->bus_info->dev);
        dev_net_set(dev, mlxsw_core_net(mlxsw_m->core));
        mlxsw_m_port = netdev_priv(dev);
        mlxsw_core_port_netdev_link(mlxsw_m->core, local_port,
                                    mlxsw_m_port, dev);
        mlxsw_m_port->dev = dev;
        mlxsw_m_port->mlxsw_m = mlxsw_m;
        mlxsw_m_port->local_port = local_port;
        mlxsw_m_port->module = module;
        mlxsw_m_port->slot_index = slot_index;
        /* Add module offset for line card. Offset for main board iz zero.
         * For line card in slot #n offset is calculated as (#n - 1)
         * multiplied by maximum modules number, which could be found on a line
         * card.
         */
        mlxsw_m_port->module_offset = mlxsw_m_port->slot_index ?
                                      (mlxsw_m_port->slot_index - 1) *
                                      mlxsw_m->max_modules_per_slot : 0;

        dev->netdev_ops = &mlxsw_m_port_netdev_ops;
        dev->ethtool_ops = &mlxsw_m_port_ethtool_ops;

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

        netif_carrier_off(dev);
        mlxsw_m->ports[local_port] = mlxsw_m_port;
        err = register_netdev(dev);
        if (err) {
                dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to register netdev\n",
                        mlxsw_m_port->local_port);
                goto err_register_netdev;
        }

        return 0;

err_register_netdev:
        mlxsw_m->ports[local_port] = NULL;
err_dev_addr_get:
        free_netdev(dev);
err_alloc_etherdev:
        mlxsw_core_port_fini(mlxsw_m->core, local_port);
        return err;
}

static void mlxsw_m_port_remove(struct mlxsw_m *mlxsw_m, u16 local_port)
{
        struct mlxsw_m_port *mlxsw_m_port = mlxsw_m->ports[local_port];

        unregister_netdev(mlxsw_m_port->dev); /* This calls ndo_stop */
        mlxsw_m->ports[local_port] = NULL;
        free_netdev(mlxsw_m_port->dev);
        mlxsw_core_port_fini(mlxsw_m->core, local_port);
}

static int*
mlxsw_m_port_mapping_get(struct mlxsw_m *mlxsw_m, u8 slot_index, u8 module)
{
        return &mlxsw_m->line_cards[slot_index]->module_to_port[module];
}

static int mlxsw_m_port_module_map(struct mlxsw_m *mlxsw_m, u16 local_port,
                                   u8 *last_module)
{
        unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
        u8 module, width, slot_index;
        int *module_to_port;
        int err;

        /* Fill out to local port mapping array */
        err = mlxsw_m_port_module_info_get(mlxsw_m, local_port, &module,
                                           &width, &slot_index);
        if (err)
                return err;

        /* Skip if line card has been already configured */
        if (mlxsw_m->line_cards[slot_index]->active)
                return 0;
        if (!width)
                return 0;
        /* Skip, if port belongs to the cluster */
        if (module == *last_module)
                return 0;
        *last_module = module;

        if (WARN_ON_ONCE(module >= max_ports))
                return -EINVAL;
        mlxsw_env_module_port_map(mlxsw_m->core, slot_index, module);
        module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, module);
        *module_to_port = local_port;

        return 0;
}

static void
mlxsw_m_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 slot_index, u8 module)
{
        int *module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index,
                                                       module);
        *module_to_port = -1;
        mlxsw_env_module_port_unmap(mlxsw_m->core, slot_index, module);
}

static int mlxsw_m_linecards_init(struct mlxsw_m *mlxsw_m)
{
        unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
        char mgpir_pl[MLXSW_REG_MGPIR_LEN];
        u8 num_of_modules;
        int i, j, err;

        mlxsw_reg_mgpir_pack(mgpir_pl, 0);
        err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(mgpir), mgpir_pl);
        if (err)
                return err;

        mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, &num_of_modules,
                               &mlxsw_m->num_of_slots);
        /* If the system is modular, get the maximum number of modules per-slot.
         * Otherwise, get the maximum number of modules on the main board.
         */
        if (mlxsw_m->num_of_slots)
                mlxsw_m->max_modules_per_slot =
                        mlxsw_reg_mgpir_max_modules_per_slot_get(mgpir_pl);
        else
                mlxsw_m->max_modules_per_slot = num_of_modules;
        /* Add slot for main board. */
        mlxsw_m->num_of_slots += 1;

        mlxsw_m->ports = kzalloc_objs(*mlxsw_m->ports, max_ports);
        if (!mlxsw_m->ports)
                return -ENOMEM;

        mlxsw_m->line_cards = kzalloc_objs(*mlxsw_m->line_cards,
                                           mlxsw_m->num_of_slots);
        if (!mlxsw_m->line_cards) {
                err = -ENOMEM;
                goto err_kcalloc;
        }

        for (i = 0; i < mlxsw_m->num_of_slots; i++) {
                mlxsw_m->line_cards[i] =
                        kzalloc_flex(*mlxsw_m->line_cards[i], module_to_port,
                                     mlxsw_m->max_modules_per_slot);
                if (!mlxsw_m->line_cards[i]) {
                        err = -ENOMEM;
                        goto err_kmalloc_array;
                }

                /* Invalidate the entries of module to local port mapping array. */
                for (j = 0; j < mlxsw_m->max_modules_per_slot; j++)
                        mlxsw_m->line_cards[i]->module_to_port[j] = -1;
        }

        return 0;

err_kmalloc_array:
        for (i--; i >= 0; i--)
                kfree(mlxsw_m->line_cards[i]);
        kfree(mlxsw_m->line_cards);
err_kcalloc:
        kfree(mlxsw_m->ports);
        return err;
}

static void mlxsw_m_linecards_fini(struct mlxsw_m *mlxsw_m)
{
        int i = mlxsw_m->num_of_slots;

        for (i--; i >= 0; i--)
                kfree(mlxsw_m->line_cards[i]);
        kfree(mlxsw_m->line_cards);
        kfree(mlxsw_m->ports);
}

static void
mlxsw_m_linecard_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 slot_index)
{
        int i;

        for (i = mlxsw_m->max_modules_per_slot - 1; i >= 0; i--) {
                int *module_to_port;

                module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, i);
                if (*module_to_port > 0)
                        mlxsw_m_port_module_unmap(mlxsw_m, slot_index, i);
        }
}

static int
mlxsw_m_linecard_ports_create(struct mlxsw_m *mlxsw_m, u8 slot_index)
{
        int *module_to_port;
        int i, err;

        for (i = 0; i < mlxsw_m->max_modules_per_slot; i++) {
                module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, i);
                if (*module_to_port > 0) {
                        err = mlxsw_m_port_create(mlxsw_m, *module_to_port,
                                                  slot_index, i);
                        if (err)
                                goto err_port_create;
                        /* Mark slot as active */
                        if (!mlxsw_m->line_cards[slot_index]->active)
                                mlxsw_m->line_cards[slot_index]->active = true;
                }
        }
        return 0;

err_port_create:
        for (i--; i >= 0; i--) {
                module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, i);
                if (*module_to_port > 0 &&
                    mlxsw_m_port_created(mlxsw_m, *module_to_port)) {
                        mlxsw_m_port_remove(mlxsw_m, *module_to_port);
                        /* Mark slot as inactive */
                        if (mlxsw_m->line_cards[slot_index]->active)
                                mlxsw_m->line_cards[slot_index]->active = false;
                }
        }
        return err;
}

static void
mlxsw_m_linecard_ports_remove(struct mlxsw_m *mlxsw_m, u8 slot_index)
{
        int i;

        for (i = 0; i < mlxsw_m->max_modules_per_slot; i++) {
                int *module_to_port = mlxsw_m_port_mapping_get(mlxsw_m,
                                                               slot_index, i);

                if (*module_to_port > 0 &&
                    mlxsw_m_port_created(mlxsw_m, *module_to_port)) {
                        mlxsw_m_port_remove(mlxsw_m, *module_to_port);
                        mlxsw_m_port_module_unmap(mlxsw_m, slot_index, i);
                }
        }
}

static int mlxsw_m_ports_module_map(struct mlxsw_m *mlxsw_m)
{
        unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
        u8 last_module = max_ports;
        int i, err;

        for (i = 1; i < max_ports; i++) {
                err = mlxsw_m_port_module_map(mlxsw_m, i, &last_module);
                if (err)
                        return err;
        }

        return 0;
}

static int mlxsw_m_ports_create(struct mlxsw_m *mlxsw_m)
{
        int err;

        /* Fill out module to local port mapping array */
        err = mlxsw_m_ports_module_map(mlxsw_m);
        if (err)
                goto err_ports_module_map;

        /* Create port objects for each valid entry */
        err = mlxsw_m_linecard_ports_create(mlxsw_m, 0);
        if (err)
                goto err_linecard_ports_create;

        return 0;

err_linecard_ports_create:
err_ports_module_map:
        mlxsw_m_linecard_port_module_unmap(mlxsw_m, 0);

        return err;
}

static void mlxsw_m_ports_remove(struct mlxsw_m *mlxsw_m)
{
        mlxsw_m_linecard_ports_remove(mlxsw_m, 0);
}

static void
mlxsw_m_ports_remove_selected(struct mlxsw_core *mlxsw_core,
                              bool (*selector)(void *priv, u16 local_port),
                              void *priv)
{
        struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
        struct mlxsw_linecard *linecard_priv = priv;
        struct mlxsw_m_line_card *linecard;

        linecard = mlxsw_m->line_cards[linecard_priv->slot_index];

        if (WARN_ON(!linecard->active))
                return;

        mlxsw_m_linecard_ports_remove(mlxsw_m, linecard_priv->slot_index);
        linecard->active = false;
}

static int mlxsw_m_fw_rev_validate(struct mlxsw_m *mlxsw_m)
{
        const struct mlxsw_fw_rev *rev = &mlxsw_m->bus_info->fw_rev;

        /* Validate driver and FW are compatible.
         * Do not check major version, since it defines chip type, while
         * driver is supposed to support any type.
         */
        if (mlxsw_core_fw_rev_minor_subminor_validate(rev, &mlxsw_m_fw_rev))
                return 0;

        dev_err(mlxsw_m->bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver (required >= %d.%d.%d)\n",
                rev->major, rev->minor, rev->subminor, rev->major,
                mlxsw_m_fw_rev.minor, mlxsw_m_fw_rev.subminor);

        return -EINVAL;
}

static void
mlxsw_m_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index, void *priv)
{
        struct mlxsw_m_line_card *linecard;
        struct mlxsw_m *mlxsw_m = priv;
        int err;

        linecard = mlxsw_m->line_cards[slot_index];
        /* Skip if line card has been already configured during init */
        if (linecard->active)
                return;

        /* Fill out module to local port mapping array */
        err = mlxsw_m_ports_module_map(mlxsw_m);
        if (err)
                goto err_ports_module_map;

        /* Create port objects for each valid entry */
        err = mlxsw_m_linecard_ports_create(mlxsw_m, slot_index);
        if (err) {
                dev_err(mlxsw_m->bus_info->dev, "Failed to create port for line card at slot %d\n",
                        slot_index);
                goto err_linecard_ports_create;
        }

        linecard->active = true;

        return;

err_linecard_ports_create:
err_ports_module_map:
        mlxsw_m_linecard_port_module_unmap(mlxsw_m, slot_index);
}

static void
mlxsw_m_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index, void *priv)
{
        struct mlxsw_m_line_card *linecard;
        struct mlxsw_m *mlxsw_m = priv;

        linecard = mlxsw_m->line_cards[slot_index];

        if (WARN_ON(!linecard->active))
                return;

        mlxsw_m_linecard_ports_remove(mlxsw_m, slot_index);
        linecard->active = false;
}

static struct mlxsw_linecards_event_ops mlxsw_m_event_ops = {
        .got_active = mlxsw_m_got_active,
        .got_inactive = mlxsw_m_got_inactive,
};

static int mlxsw_m_init(struct mlxsw_core *mlxsw_core,
                        const struct mlxsw_bus_info *mlxsw_bus_info,
                        struct netlink_ext_ack *extack)
{
        struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
        int err;

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

        err = mlxsw_m_fw_rev_validate(mlxsw_m);
        if (err)
                return err;

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

        err = mlxsw_m_linecards_init(mlxsw_m);
        if (err) {
                dev_err(mlxsw_m->bus_info->dev, "Failed to create line cards\n");
                return err;
        }

        err = mlxsw_linecards_event_ops_register(mlxsw_core,
                                                 &mlxsw_m_event_ops, mlxsw_m);
        if (err) {
                dev_err(mlxsw_m->bus_info->dev, "Failed to register line cards operations\n");
                goto linecards_event_ops_register;
        }

        err = mlxsw_m_ports_create(mlxsw_m);
        if (err) {
                dev_err(mlxsw_m->bus_info->dev, "Failed to create ports\n");
                goto err_ports_create;
        }

        return 0;

err_ports_create:
        mlxsw_linecards_event_ops_unregister(mlxsw_core,
                                             &mlxsw_m_event_ops, mlxsw_m);
linecards_event_ops_register:
        mlxsw_m_linecards_fini(mlxsw_m);
        return err;
}

static void mlxsw_m_fini(struct mlxsw_core *mlxsw_core)
{
        struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);

        mlxsw_m_ports_remove(mlxsw_m);
        mlxsw_linecards_event_ops_unregister(mlxsw_core,
                                             &mlxsw_m_event_ops, mlxsw_m);
        mlxsw_m_linecards_fini(mlxsw_m);
}

static const struct mlxsw_config_profile mlxsw_m_config_profile;

static struct mlxsw_driver mlxsw_m_driver = {
        .kind                   = mlxsw_m_driver_name,
        .priv_size              = sizeof(struct mlxsw_m),
        .init                   = mlxsw_m_init,
        .fini                   = mlxsw_m_fini,
        .ports_remove_selected  = mlxsw_m_ports_remove_selected,
        .profile                = &mlxsw_m_config_profile,
};

static const struct i2c_device_id mlxsw_m_i2c_id[] = {
        { "mlxsw_minimal" },
        { }
};

static struct i2c_driver mlxsw_m_i2c_driver = {
        .driver.name = "mlxsw_minimal",
        .id_table = mlxsw_m_i2c_id,
};

static int __init mlxsw_m_module_init(void)
{
        int err;

        err = mlxsw_core_driver_register(&mlxsw_m_driver);
        if (err)
                return err;

        err = mlxsw_i2c_driver_register(&mlxsw_m_i2c_driver);
        if (err)
                goto err_i2c_driver_register;

        return 0;

err_i2c_driver_register:
        mlxsw_core_driver_unregister(&mlxsw_m_driver);

        return err;
}

static void __exit mlxsw_m_module_exit(void)
{
        mlxsw_i2c_driver_unregister(&mlxsw_m_i2c_driver);
        mlxsw_core_driver_unregister(&mlxsw_m_driver);
}

module_init(mlxsw_m_module_init);
module_exit(mlxsw_m_module_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
MODULE_DESCRIPTION("Mellanox minimal driver");
MODULE_DEVICE_TABLE(i2c, mlxsw_m_i2c_id);