blob: 44c670807fb3cd89885dace707c385a9154965e7 [file] [log] [blame]
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2019-2020 Marvell International Ltd. All rights reserved */
#include <linux/etherdevice.h>
#include <linux/jiffies.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdev_features.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/if_vlan.h>
#include "prestera.h"
#include "prestera_hw.h"
#include "prestera_acl.h"
#include "prestera_flow.h"
#include "prestera_span.h"
#include "prestera_rxtx.h"
#include "prestera_devlink.h"
#include "prestera_ethtool.h"
#include "prestera_switchdev.h"
#define PRESTERA_MTU_DEFAULT 1536
#define PRESTERA_STATS_DELAY_MS 1000
#define PRESTERA_MAC_ADDR_NUM_MAX 255
static struct workqueue_struct *prestera_wq;
int prestera_port_pvid_set(struct prestera_port *port, u16 vid)
{
enum prestera_accept_frm_type frm_type;
int err;
frm_type = PRESTERA_ACCEPT_FRAME_TYPE_TAGGED;
if (vid) {
err = prestera_hw_vlan_port_vid_set(port, vid);
if (err)
return err;
frm_type = PRESTERA_ACCEPT_FRAME_TYPE_ALL;
}
err = prestera_hw_port_accept_frm_type(port, frm_type);
if (err && frm_type == PRESTERA_ACCEPT_FRAME_TYPE_ALL)
prestera_hw_vlan_port_vid_set(port, port->pvid);
port->pvid = vid;
return 0;
}
struct prestera_port *prestera_port_find_by_hwid(struct prestera_switch *sw,
u32 dev_id, u32 hw_id)
{
struct prestera_port *port = NULL;
read_lock(&sw->port_list_lock);
list_for_each_entry(port, &sw->port_list, list) {
if (port->dev_id == dev_id && port->hw_id == hw_id)
break;
}
read_unlock(&sw->port_list_lock);
return port;
}
struct prestera_port *prestera_find_port(struct prestera_switch *sw, u32 id)
{
struct prestera_port *port = NULL;
read_lock(&sw->port_list_lock);
list_for_each_entry(port, &sw->port_list, list) {
if (port->id == id)
break;
}
read_unlock(&sw->port_list_lock);
return port;
}
static int prestera_port_open(struct net_device *dev)
{
struct prestera_port *port = netdev_priv(dev);
int err;
err = prestera_hw_port_state_set(port, true);
if (err)
return err;
netif_start_queue(dev);
return 0;
}
static int prestera_port_close(struct net_device *dev)
{
struct prestera_port *port = netdev_priv(dev);
netif_stop_queue(dev);
return prestera_hw_port_state_set(port, false);
}
static netdev_tx_t prestera_port_xmit(struct sk_buff *skb,
struct net_device *dev)
{
return prestera_rxtx_xmit(netdev_priv(dev), skb);
}
static int prestera_is_valid_mac_addr(struct prestera_port *port, u8 *addr)
{
if (!is_valid_ether_addr(addr))
return -EADDRNOTAVAIL;
/* firmware requires that port's MAC address contains first 5 bytes
* of the base MAC address
*/
if (memcmp(port->sw->base_mac, addr, ETH_ALEN - 1))
return -EINVAL;
return 0;
}
static int prestera_port_set_mac_address(struct net_device *dev, void *p)
{
struct prestera_port *port = netdev_priv(dev);
struct sockaddr *addr = p;
int err;
err = prestera_is_valid_mac_addr(port, addr->sa_data);
if (err)
return err;
err = prestera_hw_port_mac_set(port, addr->sa_data);
if (err)
return err;
ether_addr_copy(dev->dev_addr, addr->sa_data);
return 0;
}
static int prestera_port_change_mtu(struct net_device *dev, int mtu)
{
struct prestera_port *port = netdev_priv(dev);
int err;
err = prestera_hw_port_mtu_set(port, mtu);
if (err)
return err;
dev->mtu = mtu;
return 0;
}
static void prestera_port_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats)
{
struct prestera_port *port = netdev_priv(dev);
struct prestera_port_stats *port_stats = &port->cached_hw_stats.stats;
stats->rx_packets = port_stats->broadcast_frames_received +
port_stats->multicast_frames_received +
port_stats->unicast_frames_received;
stats->tx_packets = port_stats->broadcast_frames_sent +
port_stats->multicast_frames_sent +
port_stats->unicast_frames_sent;
stats->rx_bytes = port_stats->good_octets_received;
stats->tx_bytes = port_stats->good_octets_sent;
stats->rx_errors = port_stats->rx_error_frame_received;
stats->tx_errors = port_stats->mac_trans_error;
stats->rx_dropped = port_stats->buffer_overrun;
stats->tx_dropped = 0;
stats->multicast = port_stats->multicast_frames_received;
stats->collisions = port_stats->excessive_collision;
stats->rx_crc_errors = port_stats->bad_crc;
}
static void prestera_port_get_hw_stats(struct prestera_port *port)
{
prestera_hw_port_stats_get(port, &port->cached_hw_stats.stats);
}
static void prestera_port_stats_update(struct work_struct *work)
{
struct prestera_port *port =
container_of(work, struct prestera_port,
cached_hw_stats.caching_dw.work);
prestera_port_get_hw_stats(port);
queue_delayed_work(prestera_wq, &port->cached_hw_stats.caching_dw,
msecs_to_jiffies(PRESTERA_STATS_DELAY_MS));
}
static int prestera_port_setup_tc(struct net_device *dev,
enum tc_setup_type type,
void *type_data)
{
struct prestera_port *port = netdev_priv(dev);
switch (type) {
case TC_SETUP_BLOCK:
return prestera_flow_block_setup(port, type_data);
default:
return -EOPNOTSUPP;
}
}
static const struct net_device_ops prestera_netdev_ops = {
.ndo_open = prestera_port_open,
.ndo_stop = prestera_port_close,
.ndo_start_xmit = prestera_port_xmit,
.ndo_setup_tc = prestera_port_setup_tc,
.ndo_change_mtu = prestera_port_change_mtu,
.ndo_get_stats64 = prestera_port_get_stats64,
.ndo_set_mac_address = prestera_port_set_mac_address,
.ndo_get_devlink_port = prestera_devlink_get_port,
};
int prestera_port_autoneg_set(struct prestera_port *port, bool enable,
u64 adver_link_modes, u8 adver_fec)
{
bool refresh = false;
u64 link_modes;
int err;
u8 fec;
if (port->caps.type != PRESTERA_PORT_TYPE_TP)
return enable ? -EINVAL : 0;
if (!enable)
goto set_autoneg;
link_modes = port->caps.supp_link_modes & adver_link_modes;
fec = port->caps.supp_fec & adver_fec;
if (!link_modes && !fec)
return -EOPNOTSUPP;
if (link_modes && port->adver_link_modes != link_modes) {
port->adver_link_modes = link_modes;
refresh = true;
}
if (fec && port->adver_fec != fec) {
port->adver_fec = fec;
refresh = true;
}
set_autoneg:
if (port->autoneg == enable && !refresh)
return 0;
err = prestera_hw_port_autoneg_set(port, enable, port->adver_link_modes,
port->adver_fec);
if (err)
return err;
port->autoneg = enable;
return 0;
}
static void prestera_port_list_add(struct prestera_port *port)
{
write_lock(&port->sw->port_list_lock);
list_add(&port->list, &port->sw->port_list);
write_unlock(&port->sw->port_list_lock);
}
static void prestera_port_list_del(struct prestera_port *port)
{
write_lock(&port->sw->port_list_lock);
list_del(&port->list);
write_unlock(&port->sw->port_list_lock);
}
static int prestera_port_create(struct prestera_switch *sw, u32 id)
{
struct prestera_port *port;
struct net_device *dev;
int err;
dev = alloc_etherdev(sizeof(*port));
if (!dev)
return -ENOMEM;
port = netdev_priv(dev);
INIT_LIST_HEAD(&port->vlans_list);
port->pvid = PRESTERA_DEFAULT_VID;
port->lag = NULL;
port->dev = dev;
port->id = id;
port->sw = sw;
err = prestera_hw_port_info_get(port, &port->dev_id, &port->hw_id,
&port->fp_id);
if (err) {
dev_err(prestera_dev(sw), "Failed to get port(%u) info\n", id);
goto err_port_info_get;
}
err = prestera_devlink_port_register(port);
if (err)
goto err_dl_port_register;
dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_HW_TC;
dev->netdev_ops = &prestera_netdev_ops;
dev->ethtool_ops = &prestera_ethtool_ops;
netif_carrier_off(dev);
dev->mtu = min_t(unsigned int, sw->mtu_max, PRESTERA_MTU_DEFAULT);
dev->min_mtu = sw->mtu_min;
dev->max_mtu = sw->mtu_max;
err = prestera_hw_port_mtu_set(port, dev->mtu);
if (err) {
dev_err(prestera_dev(sw), "Failed to set port(%u) mtu(%d)\n",
id, dev->mtu);
goto err_port_init;
}
if (port->fp_id >= PRESTERA_MAC_ADDR_NUM_MAX) {
err = -EINVAL;
goto err_port_init;
}
/* firmware requires that port's MAC address consist of the first
* 5 bytes of the base MAC address
*/
memcpy(dev->dev_addr, sw->base_mac, dev->addr_len - 1);
dev->dev_addr[dev->addr_len - 1] = port->fp_id;
err = prestera_hw_port_mac_set(port, dev->dev_addr);
if (err) {
dev_err(prestera_dev(sw), "Failed to set port(%u) mac addr\n", id);
goto err_port_init;
}
err = prestera_hw_port_cap_get(port, &port->caps);
if (err) {
dev_err(prestera_dev(sw), "Failed to get port(%u) caps\n", id);
goto err_port_init;
}
port->adver_fec = BIT(PRESTERA_PORT_FEC_OFF);
prestera_port_autoneg_set(port, true, port->caps.supp_link_modes,
port->caps.supp_fec);
err = prestera_hw_port_state_set(port, false);
if (err) {
dev_err(prestera_dev(sw), "Failed to set port(%u) down\n", id);
goto err_port_init;
}
err = prestera_rxtx_port_init(port);
if (err)
goto err_port_init;
INIT_DELAYED_WORK(&port->cached_hw_stats.caching_dw,
&prestera_port_stats_update);
prestera_port_list_add(port);
err = register_netdev(dev);
if (err)
goto err_register_netdev;
prestera_devlink_port_set(port);
return 0;
err_register_netdev:
prestera_port_list_del(port);
err_port_init:
prestera_devlink_port_unregister(port);
err_dl_port_register:
err_port_info_get:
free_netdev(dev);
return err;
}
static void prestera_port_destroy(struct prestera_port *port)
{
struct net_device *dev = port->dev;
cancel_delayed_work_sync(&port->cached_hw_stats.caching_dw);
prestera_devlink_port_clear(port);
unregister_netdev(dev);
prestera_port_list_del(port);
prestera_devlink_port_unregister(port);
free_netdev(dev);
}
static void prestera_destroy_ports(struct prestera_switch *sw)
{
struct prestera_port *port, *tmp;
list_for_each_entry_safe(port, tmp, &sw->port_list, list)
prestera_port_destroy(port);
}
static int prestera_create_ports(struct prestera_switch *sw)
{
struct prestera_port *port, *tmp;
u32 port_idx;
int err;
for (port_idx = 0; port_idx < sw->port_count; port_idx++) {
err = prestera_port_create(sw, port_idx);
if (err)
goto err_port_create;
}
return 0;
err_port_create:
list_for_each_entry_safe(port, tmp, &sw->port_list, list)
prestera_port_destroy(port);
return err;
}
static void prestera_port_handle_event(struct prestera_switch *sw,
struct prestera_event *evt, void *arg)
{
struct delayed_work *caching_dw;
struct prestera_port *port;
port = prestera_find_port(sw, evt->port_evt.port_id);
if (!port || !port->dev)
return;
caching_dw = &port->cached_hw_stats.caching_dw;
if (evt->id == PRESTERA_PORT_EVENT_STATE_CHANGED) {
if (evt->port_evt.data.oper_state) {
netif_carrier_on(port->dev);
if (!delayed_work_pending(caching_dw))
queue_delayed_work(prestera_wq, caching_dw, 0);
} else if (netif_running(port->dev) &&
netif_carrier_ok(port->dev)) {
netif_carrier_off(port->dev);
if (delayed_work_pending(caching_dw))
cancel_delayed_work(caching_dw);
}
}
}
static int prestera_event_handlers_register(struct prestera_switch *sw)
{
return prestera_hw_event_handler_register(sw, PRESTERA_EVENT_TYPE_PORT,
prestera_port_handle_event,
NULL);
}
static void prestera_event_handlers_unregister(struct prestera_switch *sw)
{
prestera_hw_event_handler_unregister(sw, PRESTERA_EVENT_TYPE_PORT,
prestera_port_handle_event);
}
static int prestera_switch_set_base_mac_addr(struct prestera_switch *sw)
{
struct device_node *base_mac_np;
struct device_node *np;
int ret;
np = of_find_compatible_node(NULL, NULL, "marvell,prestera");
base_mac_np = of_parse_phandle(np, "base-mac-provider", 0);
ret = of_get_mac_address(base_mac_np, sw->base_mac);
if (ret) {
eth_random_addr(sw->base_mac);
dev_info(prestera_dev(sw), "using random base mac address\n");
}
of_node_put(base_mac_np);
return prestera_hw_switch_mac_set(sw, sw->base_mac);
}
struct prestera_lag *prestera_lag_by_id(struct prestera_switch *sw, u16 id)
{
return id < sw->lag_max ? &sw->lags[id] : NULL;
}
static struct prestera_lag *prestera_lag_by_dev(struct prestera_switch *sw,
struct net_device *dev)
{
struct prestera_lag *lag;
u16 id;
for (id = 0; id < sw->lag_max; id++) {
lag = &sw->lags[id];
if (lag->dev == dev)
return lag;
}
return NULL;
}
static struct prestera_lag *prestera_lag_create(struct prestera_switch *sw,
struct net_device *lag_dev)
{
struct prestera_lag *lag = NULL;
u16 id;
for (id = 0; id < sw->lag_max; id++) {
lag = &sw->lags[id];
if (!lag->dev)
break;
}
if (lag) {
INIT_LIST_HEAD(&lag->members);
lag->dev = lag_dev;
}
return lag;
}
static void prestera_lag_destroy(struct prestera_switch *sw,
struct prestera_lag *lag)
{
WARN_ON(!list_empty(&lag->members));
lag->member_count = 0;
lag->dev = NULL;
}
static int prestera_lag_port_add(struct prestera_port *port,
struct net_device *lag_dev)
{
struct prestera_switch *sw = port->sw;
struct prestera_lag *lag;
int err;
lag = prestera_lag_by_dev(sw, lag_dev);
if (!lag) {
lag = prestera_lag_create(sw, lag_dev);
if (!lag)
return -ENOSPC;
}
if (lag->member_count >= sw->lag_member_max)
return -ENOSPC;
err = prestera_hw_lag_member_add(port, lag->lag_id);
if (err) {
if (!lag->member_count)
prestera_lag_destroy(sw, lag);
return err;
}
list_add(&port->lag_member, &lag->members);
lag->member_count++;
port->lag = lag;
return 0;
}
static int prestera_lag_port_del(struct prestera_port *port)
{
struct prestera_switch *sw = port->sw;
struct prestera_lag *lag = port->lag;
int err;
if (!lag || !lag->member_count)
return -EINVAL;
err = prestera_hw_lag_member_del(port, lag->lag_id);
if (err)
return err;
list_del(&port->lag_member);
lag->member_count--;
port->lag = NULL;
if (netif_is_bridge_port(lag->dev)) {
struct net_device *br_dev;
br_dev = netdev_master_upper_dev_get(lag->dev);
prestera_bridge_port_leave(br_dev, port);
}
if (!lag->member_count)
prestera_lag_destroy(sw, lag);
return 0;
}
bool prestera_port_is_lag_member(const struct prestera_port *port)
{
return !!port->lag;
}
u16 prestera_port_lag_id(const struct prestera_port *port)
{
return port->lag->lag_id;
}
static int prestera_lag_init(struct prestera_switch *sw)
{
u16 id;
sw->lags = kcalloc(sw->lag_max, sizeof(*sw->lags), GFP_KERNEL);
if (!sw->lags)
return -ENOMEM;
for (id = 0; id < sw->lag_max; id++)
sw->lags[id].lag_id = id;
return 0;
}
static void prestera_lag_fini(struct prestera_switch *sw)
{
u8 idx;
for (idx = 0; idx < sw->lag_max; idx++)
WARN_ON(sw->lags[idx].member_count);
kfree(sw->lags);
}
bool prestera_netdev_check(const struct net_device *dev)
{
return dev->netdev_ops == &prestera_netdev_ops;
}
static int prestera_lower_dev_walk(struct net_device *dev,
struct netdev_nested_priv *priv)
{
struct prestera_port **pport = (struct prestera_port **)priv->data;
if (prestera_netdev_check(dev)) {
*pport = netdev_priv(dev);
return 1;
}
return 0;
}
struct prestera_port *prestera_port_dev_lower_find(struct net_device *dev)
{
struct prestera_port *port = NULL;
struct netdev_nested_priv priv = {
.data = (void *)&port,
};
if (prestera_netdev_check(dev))
return netdev_priv(dev);
netdev_walk_all_lower_dev(dev, prestera_lower_dev_walk, &priv);
return port;
}
static int prestera_netdev_port_lower_event(struct net_device *dev,
unsigned long event, void *ptr)
{
struct netdev_notifier_changelowerstate_info *info = ptr;
struct netdev_lag_lower_state_info *lower_state_info;
struct prestera_port *port = netdev_priv(dev);
bool enabled;
if (!netif_is_lag_port(dev))
return 0;
if (!prestera_port_is_lag_member(port))
return 0;
lower_state_info = info->lower_state_info;
enabled = lower_state_info->link_up && lower_state_info->tx_enabled;
return prestera_hw_lag_member_enable(port, port->lag->lag_id, enabled);
}
static bool prestera_lag_master_check(struct net_device *lag_dev,
struct netdev_lag_upper_info *info,
struct netlink_ext_ack *ext_ack)
{
if (info->tx_type != NETDEV_LAG_TX_TYPE_HASH) {
NL_SET_ERR_MSG_MOD(ext_ack, "Unsupported LAG Tx type");
return false;
}
return true;
}
static int prestera_netdev_port_event(struct net_device *lower,
struct net_device *dev,
unsigned long event, void *ptr)
{
struct netdev_notifier_changeupper_info *info = ptr;
struct prestera_port *port = netdev_priv(dev);
struct netlink_ext_ack *extack;
struct net_device *upper;
extack = netdev_notifier_info_to_extack(&info->info);
upper = info->upper_dev;
switch (event) {
case NETDEV_PRECHANGEUPPER:
if (!netif_is_bridge_master(upper) &&
!netif_is_lag_master(upper)) {
NL_SET_ERR_MSG_MOD(extack, "Unknown upper device type");
return -EINVAL;
}
if (!info->linking)
break;
if (netdev_has_any_upper_dev(upper)) {
NL_SET_ERR_MSG_MOD(extack, "Upper device is already enslaved");
return -EINVAL;
}
if (netif_is_lag_master(upper) &&
!prestera_lag_master_check(upper, info->upper_info, extack))
return -EOPNOTSUPP;
if (netif_is_lag_master(upper) && vlan_uses_dev(dev)) {
NL_SET_ERR_MSG_MOD(extack,
"Master device is a LAG master and port has a VLAN");
return -EINVAL;
}
if (netif_is_lag_port(dev) && is_vlan_dev(upper) &&
!netif_is_lag_master(vlan_dev_real_dev(upper))) {
NL_SET_ERR_MSG_MOD(extack,
"Can not put a VLAN on a LAG port");
return -EINVAL;
}
break;
case NETDEV_CHANGEUPPER:
if (netif_is_bridge_master(upper)) {
if (info->linking)
return prestera_bridge_port_join(upper, port,
extack);
else
prestera_bridge_port_leave(upper, port);
} else if (netif_is_lag_master(upper)) {
if (info->linking)
return prestera_lag_port_add(port, upper);
else
prestera_lag_port_del(port);
}
break;
case NETDEV_CHANGELOWERSTATE:
return prestera_netdev_port_lower_event(dev, event, ptr);
}
return 0;
}
static int prestera_netdevice_lag_event(struct net_device *lag_dev,
unsigned long event, void *ptr)
{
struct net_device *dev;
struct list_head *iter;
int err;
netdev_for_each_lower_dev(lag_dev, dev, iter) {
if (prestera_netdev_check(dev)) {
err = prestera_netdev_port_event(lag_dev, dev, event,
ptr);
if (err)
return err;
}
}
return 0;
}
static int prestera_netdev_event_handler(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
int err = 0;
if (prestera_netdev_check(dev))
err = prestera_netdev_port_event(dev, dev, event, ptr);
else if (netif_is_lag_master(dev))
err = prestera_netdevice_lag_event(dev, event, ptr);
return notifier_from_errno(err);
}
static int prestera_netdev_event_handler_register(struct prestera_switch *sw)
{
sw->netdev_nb.notifier_call = prestera_netdev_event_handler;
return register_netdevice_notifier(&sw->netdev_nb);
}
static void prestera_netdev_event_handler_unregister(struct prestera_switch *sw)
{
unregister_netdevice_notifier(&sw->netdev_nb);
}
static int prestera_switch_init(struct prestera_switch *sw)
{
int err;
err = prestera_hw_switch_init(sw);
if (err) {
dev_err(prestera_dev(sw), "Failed to init Switch device\n");
return err;
}
rwlock_init(&sw->port_list_lock);
INIT_LIST_HEAD(&sw->port_list);
err = prestera_switch_set_base_mac_addr(sw);
if (err)
return err;
err = prestera_netdev_event_handler_register(sw);
if (err)
return err;
err = prestera_switchdev_init(sw);
if (err)
goto err_swdev_register;
err = prestera_rxtx_switch_init(sw);
if (err)
goto err_rxtx_register;
err = prestera_event_handlers_register(sw);
if (err)
goto err_handlers_register;
err = prestera_acl_init(sw);
if (err)
goto err_acl_init;
err = prestera_span_init(sw);
if (err)
goto err_span_init;
err = prestera_devlink_register(sw);
if (err)
goto err_dl_register;
err = prestera_lag_init(sw);
if (err)
goto err_lag_init;
err = prestera_create_ports(sw);
if (err)
goto err_ports_create;
return 0;
err_ports_create:
prestera_lag_fini(sw);
err_lag_init:
prestera_devlink_unregister(sw);
err_dl_register:
prestera_span_fini(sw);
err_span_init:
prestera_acl_fini(sw);
err_acl_init:
prestera_event_handlers_unregister(sw);
err_handlers_register:
prestera_rxtx_switch_fini(sw);
err_rxtx_register:
prestera_switchdev_fini(sw);
err_swdev_register:
prestera_netdev_event_handler_unregister(sw);
prestera_hw_switch_fini(sw);
return err;
}
static void prestera_switch_fini(struct prestera_switch *sw)
{
prestera_destroy_ports(sw);
prestera_lag_fini(sw);
prestera_devlink_unregister(sw);
prestera_span_fini(sw);
prestera_acl_fini(sw);
prestera_event_handlers_unregister(sw);
prestera_rxtx_switch_fini(sw);
prestera_switchdev_fini(sw);
prestera_netdev_event_handler_unregister(sw);
prestera_hw_switch_fini(sw);
}
int prestera_device_register(struct prestera_device *dev)
{
struct prestera_switch *sw;
int err;
sw = prestera_devlink_alloc(dev);
if (!sw)
return -ENOMEM;
dev->priv = sw;
sw->dev = dev;
err = prestera_switch_init(sw);
if (err) {
prestera_devlink_free(sw);
return err;
}
return 0;
}
EXPORT_SYMBOL(prestera_device_register);
void prestera_device_unregister(struct prestera_device *dev)
{
struct prestera_switch *sw = dev->priv;
prestera_switch_fini(sw);
prestera_devlink_free(sw);
}
EXPORT_SYMBOL(prestera_device_unregister);
static int __init prestera_module_init(void)
{
prestera_wq = alloc_workqueue("prestera", 0, 0);
if (!prestera_wq)
return -ENOMEM;
return 0;
}
static void __exit prestera_module_exit(void)
{
destroy_workqueue(prestera_wq);
}
module_init(prestera_module_init);
module_exit(prestera_module_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Marvell Prestera switch driver");