// SPDX-License-Identifier: GPL-2.0+
#include <linux/if_bridge.h>
#include <net/switchdev.h>
#include "lan966x_main.h"
static struct notifier_block lan966x_netdevice_nb __read_mostly;
static void lan966x_port_set_mcast_ip_flood(struct lan966x_port *port,
u32 pgid_ip)
{
struct lan966x *lan966x = port->lan966x;
u32 flood_mask_ip;
flood_mask_ip = lan_rd(lan966x, ANA_PGID(pgid_ip));
flood_mask_ip = ANA_PGID_PGID_GET(flood_mask_ip);
/* If mcast snooping is not enabled then use mcast flood mask
* to decide to enable multicast flooding or not.
*/
if (!port->mcast_ena) {
u32 flood_mask;
flood_mask = lan_rd(lan966x, ANA_PGID(PGID_MC));
flood_mask = ANA_PGID_PGID_GET(flood_mask);
if (flood_mask & BIT(port->chip_port))
flood_mask_ip |= BIT(port->chip_port);
else
flood_mask_ip &= ~BIT(port->chip_port);
} else {
flood_mask_ip &= ~BIT(port->chip_port);
}
lan_rmw(ANA_PGID_PGID_SET(flood_mask_ip),
ANA_PGID_PGID,
lan966x, ANA_PGID(pgid_ip));
}
static void lan966x_port_set_mcast_flood(struct lan966x_port *port,
bool enabled)
{
u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_MC));
val = ANA_PGID_PGID_GET(val);
if (enabled)
val |= BIT(port->chip_port);
else
val &= ~BIT(port->chip_port);
lan_rmw(ANA_PGID_PGID_SET(val),
ANA_PGID_PGID,
port->lan966x, ANA_PGID(PGID_MC));
if (!port->mcast_ena) {
lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV4);
lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV6);
}
}
static void lan966x_port_set_ucast_flood(struct lan966x_port *port,
bool enabled)
{
u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_UC));
val = ANA_PGID_PGID_GET(val);
if (enabled)
val |= BIT(port->chip_port);
else
val &= ~BIT(port->chip_port);
lan_rmw(ANA_PGID_PGID_SET(val),
ANA_PGID_PGID,
port->lan966x, ANA_PGID(PGID_UC));
}
static void lan966x_port_set_bcast_flood(struct lan966x_port *port,
bool enabled)
{
u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_BC));
val = ANA_PGID_PGID_GET(val);
if (enabled)
val |= BIT(port->chip_port);
else
val &= ~BIT(port->chip_port);
lan_rmw(ANA_PGID_PGID_SET(val),
ANA_PGID_PGID,
port->lan966x, ANA_PGID(PGID_BC));
}
static void lan966x_port_set_learning(struct lan966x_port *port, bool enabled)
{
lan_rmw(ANA_PORT_CFG_LEARN_ENA_SET(enabled),
ANA_PORT_CFG_LEARN_ENA,
port->lan966x, ANA_PORT_CFG(port->chip_port));
port->learn_ena = enabled;
}
static void lan966x_port_bridge_flags(struct lan966x_port *port,
struct switchdev_brport_flags flags)
{
if (flags.mask & BR_MCAST_FLOOD)
lan966x_port_set_mcast_flood(port,
!!(flags.val & BR_MCAST_FLOOD));
if (flags.mask & BR_FLOOD)
lan966x_port_set_ucast_flood(port,
!!(flags.val & BR_FLOOD));
if (flags.mask & BR_BCAST_FLOOD)
lan966x_port_set_bcast_flood(port,
!!(flags.val & BR_BCAST_FLOOD));
if (flags.mask & BR_LEARNING)
lan966x_port_set_learning(port,
!!(flags.val & BR_LEARNING));
}
static int lan966x_port_pre_bridge_flags(struct lan966x_port *port,
struct switchdev_brport_flags flags)
{
if (flags.mask & ~(BR_MCAST_FLOOD | BR_FLOOD | BR_BCAST_FLOOD |
BR_LEARNING))
return -EINVAL;
return 0;
}
void lan966x_update_fwd_mask(struct lan966x *lan966x)
{
int i;
for (i = 0; i < lan966x->num_phys_ports; i++) {
struct lan966x_port *port = lan966x->ports[i];
unsigned long mask = 0;
if (port && lan966x->bridge_fwd_mask & BIT(i)) {
mask = lan966x->bridge_fwd_mask & ~BIT(i);
if (port->bond)
mask &= ~lan966x_lag_get_mask(lan966x,
port->bond);
}
mask |= BIT(CPU_PORT);
lan_wr(ANA_PGID_PGID_SET(mask),
lan966x, ANA_PGID(PGID_SRC + i));
}
}
void lan966x_port_stp_state_set(struct lan966x_port *port, u8 state)
{
struct lan966x *lan966x = port->lan966x;
bool learn_ena = false;
if ((state == BR_STATE_FORWARDING || state == BR_STATE_LEARNING) &&
port->learn_ena)
learn_ena = true;
if (state == BR_STATE_FORWARDING)
lan966x->bridge_fwd_mask |= BIT(port->chip_port);
else
lan966x->bridge_fwd_mask &= ~BIT(port->chip_port);
lan_rmw(ANA_PORT_CFG_LEARN_ENA_SET(learn_ena),
ANA_PORT_CFG_LEARN_ENA,
lan966x, ANA_PORT_CFG(port->chip_port));
lan966x_update_fwd_mask(lan966x);
}
void lan966x_port_ageing_set(struct lan966x_port *port,
unsigned long ageing_clock_t)
{
unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
u32 ageing_time = jiffies_to_msecs(ageing_jiffies) / 1000;
lan966x_mac_set_ageing(port->lan966x, ageing_time);
}
static void lan966x_port_mc_set(struct lan966x_port *port, bool mcast_ena)
{
struct lan966x *lan966x = port->lan966x;
port->mcast_ena = mcast_ena;
if (mcast_ena)
lan966x_mdb_restore_entries(lan966x);
else
lan966x_mdb_clear_entries(lan966x);
lan_rmw(ANA_CPU_FWD_CFG_IGMP_REDIR_ENA_SET(mcast_ena) |
ANA_CPU_FWD_CFG_MLD_REDIR_ENA_SET(mcast_ena) |
ANA_CPU_FWD_CFG_IPMC_CTRL_COPY_ENA_SET(mcast_ena),
ANA_CPU_FWD_CFG_IGMP_REDIR_ENA |
ANA_CPU_FWD_CFG_MLD_REDIR_ENA |
ANA_CPU_FWD_CFG_IPMC_CTRL_COPY_ENA,
lan966x, ANA_CPU_FWD_CFG(port->chip_port));
lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV4);
lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV6);
}
static int lan966x_port_attr_set(struct net_device *dev, const void *ctx,
const struct switchdev_attr *attr,
struct netlink_ext_ack *extack)
{
struct lan966x_port *port = netdev_priv(dev);
int err = 0;
if (ctx && ctx != port)
return 0;
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
lan966x_port_bridge_flags(port, attr->u.brport_flags);
break;
case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
err = lan966x_port_pre_bridge_flags(port, attr->u.brport_flags);
break;
case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
lan966x_port_stp_state_set(port, attr->u.stp_state);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
lan966x_port_ageing_set(port, attr->u.ageing_time);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
lan966x_vlan_port_set_vlan_aware(port, attr->u.vlan_filtering);
lan966x_vlan_port_apply(port);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
lan966x_port_mc_set(port, !attr->u.mc_disabled);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int lan966x_port_bridge_join(struct lan966x_port *port,
struct net_device *brport_dev,
struct net_device *bridge,
struct netlink_ext_ack *extack)
{
struct switchdev_brport_flags flags = {0};
struct lan966x *lan966x = port->lan966x;
struct net_device *dev = port->dev;
int err;
if (!lan966x->bridge_mask) {
lan966x->bridge = bridge;
} else {
if (lan966x->bridge != bridge) {
NL_SET_ERR_MSG_MOD(extack, "Not allow to add port to different bridge");
return -ENODEV;
}
}
err = switchdev_bridge_port_offload(brport_dev, dev, port,
&lan966x_switchdev_nb,
&lan966x_switchdev_blocking_nb,
false, extack);
if (err)
return err;
lan966x->bridge_mask |= BIT(port->chip_port);
flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
flags.val = flags.mask;
lan966x_port_bridge_flags(port, flags);
return 0;
}
static void lan966x_port_bridge_leave(struct lan966x_port *port,
struct net_device *bridge)
{
struct switchdev_brport_flags flags = {0};
struct lan966x *lan966x = port->lan966x;
flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
flags.val = flags.mask & ~BR_LEARNING;
lan966x_port_bridge_flags(port, flags);
lan966x->bridge_mask &= ~BIT(port->chip_port);
if (!lan966x->bridge_mask)
lan966x->bridge = NULL;
/* Set the port back to host mode */
lan966x_vlan_port_set_vlan_aware(port, false);
lan966x_vlan_port_set_vid(port, HOST_PVID, false, false);
lan966x_vlan_port_apply(port);
}
int lan966x_port_changeupper(struct net_device *dev,
struct net_device *brport_dev,
struct netdev_notifier_changeupper_info *info)
{
struct lan966x_port *port = netdev_priv(dev);
struct netlink_ext_ack *extack;
int err = 0;
extack = netdev_notifier_info_to_extack(&info->info);
if (netif_is_bridge_master(info->upper_dev)) {
if (info->linking)
err = lan966x_port_bridge_join(port, brport_dev,
info->upper_dev,
extack);
else
lan966x_port_bridge_leave(port, info->upper_dev);
}
if (netif_is_lag_master(info->upper_dev)) {
if (info->linking)
err = lan966x_lag_port_join(port, info->upper_dev,
info->upper_dev,
extack);
else
lan966x_lag_port_leave(port, info->upper_dev);
}
return err;
}
int lan966x_port_prechangeupper(struct net_device *dev,
struct net_device *brport_dev,
struct netdev_notifier_changeupper_info *info)
{
struct lan966x_port *port = netdev_priv(dev);
int err = NOTIFY_DONE;
if (netif_is_bridge_master(info->upper_dev) && !info->linking) {
switchdev_bridge_port_unoffload(port->dev, port, NULL, NULL);
lan966x_fdb_flush_workqueue(port->lan966x);
}
if (netif_is_lag_master(info->upper_dev)) {
err = lan966x_lag_port_prechangeupper(dev, info);
if (err || info->linking)
return err;
switchdev_bridge_port_unoffload(brport_dev, port, NULL, NULL);
lan966x_fdb_flush_workqueue(port->lan966x);
}
return err;
}
static int lan966x_foreign_bridging_check(struct net_device *upper,
bool *has_foreign,
bool *seen_lan966x,
struct netlink_ext_ack *extack)
{
struct lan966x *lan966x = NULL;
struct net_device *dev;
struct list_head *iter;
if (!netif_is_bridge_master(upper) &&
!netif_is_lag_master(upper))
return 0;
netdev_for_each_lower_dev(upper, dev, iter) {
if (lan966x_netdevice_check(dev)) {
struct lan966x_port *port = netdev_priv(dev);
if (lan966x) {
/* Upper already has at least one port of a
* lan966x switch inside it, check that it's
* the same instance of the driver.
*/
if (port->lan966x != lan966x) {
NL_SET_ERR_MSG_MOD(extack,
"Bridging between multiple lan966x switches disallowed");
return -EINVAL;
}
} else {
/* This is the first lan966x port inside this
* upper device
*/
lan966x = port->lan966x;
*seen_lan966x = true;
}
} else if (netif_is_lag_master(dev)) {
/* Allow to have bond interfaces that have only lan966x
* devices
*/
if (lan966x_foreign_bridging_check(dev, has_foreign,
seen_lan966x,
extack))
return -EINVAL;
} else {
*has_foreign = true;
}
if (*seen_lan966x && *has_foreign) {
NL_SET_ERR_MSG_MOD(extack,
"Bridging lan966x ports with foreign interfaces disallowed");
return -EINVAL;
}
}
return 0;
}
static int lan966x_bridge_check(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
bool has_foreign = false;
bool seen_lan966x = false;
return lan966x_foreign_bridging_check(info->upper_dev,
&has_foreign,
&seen_lan966x,
info->info.extack);
}
static int lan966x_netdevice_port_event(struct net_device *dev,
struct notifier_block *nb,
unsigned long event, void *ptr)
{
int err = 0;
if (!lan966x_netdevice_check(dev)) {
switch (event) {
case NETDEV_CHANGEUPPER:
case NETDEV_PRECHANGEUPPER:
err = lan966x_bridge_check(dev, ptr);
if (err)
return err;
if (netif_is_lag_master(dev)) {
if (event == NETDEV_CHANGEUPPER)
err = lan966x_lag_netdev_changeupper(dev,
ptr);
else
err = lan966x_lag_netdev_prechangeupper(dev,
ptr);
return err;
}
break;
default:
return 0;
}
return 0;
}
switch (event) {
case NETDEV_PRECHANGEUPPER:
err = lan966x_port_prechangeupper(dev, dev, ptr);
break;
case NETDEV_CHANGEUPPER:
err = lan966x_bridge_check(dev, ptr);
if (err)
return err;
err = lan966x_port_changeupper(dev, dev, ptr);
break;
case NETDEV_CHANGELOWERSTATE:
err = lan966x_lag_port_changelowerstate(dev, ptr);
break;
}
return err;
}
static int lan966x_netdevice_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
int ret;
ret = lan966x_netdevice_port_event(dev, nb, event, ptr);
return notifier_from_errno(ret);
}
static bool lan966x_foreign_dev_check(const struct net_device *dev,
const struct net_device *foreign_dev)
{
struct lan966x_port *port = netdev_priv(dev);
struct lan966x *lan966x = port->lan966x;
int i;
if (netif_is_bridge_master(foreign_dev))
if (lan966x->bridge == foreign_dev)
return false;
if (netif_is_lag_master(foreign_dev))
for (i = 0; i < lan966x->num_phys_ports; ++i)
if (lan966x->ports[i] &&
lan966x->ports[i]->bond == foreign_dev)
return false;
return true;
}
static int lan966x_switchdev_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
int err;
switch (event) {
case SWITCHDEV_PORT_ATTR_SET:
err = switchdev_handle_port_attr_set(dev, ptr,
lan966x_netdevice_check,
lan966x_port_attr_set);
return notifier_from_errno(err);
case SWITCHDEV_FDB_ADD_TO_DEVICE:
case SWITCHDEV_FDB_DEL_TO_DEVICE:
err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
lan966x_netdevice_check,
lan966x_foreign_dev_check,
lan966x_handle_fdb);
return notifier_from_errno(err);
}
return NOTIFY_DONE;
}
static int lan966x_handle_port_vlan_add(struct lan966x_port *port,
const struct switchdev_obj *obj)
{
const struct switchdev_obj_port_vlan *v = SWITCHDEV_OBJ_PORT_VLAN(obj);
struct lan966x *lan966x = port->lan966x;
if (!netif_is_bridge_master(obj->orig_dev))
lan966x_vlan_port_add_vlan(port, v->vid,
v->flags & BRIDGE_VLAN_INFO_PVID,
v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
else
lan966x_vlan_cpu_add_vlan(lan966x, v->vid);
return 0;
}
static int lan966x_handle_port_obj_add(struct net_device *dev, const void *ctx,
const struct switchdev_obj *obj,
struct netlink_ext_ack *extack)
{
struct lan966x_port *port = netdev_priv(dev);
int err;
if (ctx && ctx != port)
return 0;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = lan966x_handle_port_vlan_add(port, obj);
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
case SWITCHDEV_OBJ_ID_HOST_MDB:
err = lan966x_handle_port_mdb_add(port, obj);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int lan966x_handle_port_vlan_del(struct lan966x_port *port,
const struct switchdev_obj *obj)
{
const struct switchdev_obj_port_vlan *v = SWITCHDEV_OBJ_PORT_VLAN(obj);
struct lan966x *lan966x = port->lan966x;
if (!netif_is_bridge_master(obj->orig_dev))
lan966x_vlan_port_del_vlan(port, v->vid);
else
lan966x_vlan_cpu_del_vlan(lan966x, v->vid);
return 0;
}
static int lan966x_handle_port_obj_del(struct net_device *dev, const void *ctx,
const struct switchdev_obj *obj)
{
struct lan966x_port *port = netdev_priv(dev);
int err;
if (ctx && ctx != port)
return 0;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = lan966x_handle_port_vlan_del(port, obj);
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
case SWITCHDEV_OBJ_ID_HOST_MDB:
err = lan966x_handle_port_mdb_del(port, obj);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int lan966x_switchdev_blocking_event(struct notifier_block *nb,
unsigned long event,
void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
int err;
switch (event) {
case SWITCHDEV_PORT_OBJ_ADD:
err = switchdev_handle_port_obj_add(dev, ptr,
lan966x_netdevice_check,
lan966x_handle_port_obj_add);
return notifier_from_errno(err);
case SWITCHDEV_PORT_OBJ_DEL:
err = switchdev_handle_port_obj_del(dev, ptr,
lan966x_netdevice_check,
lan966x_handle_port_obj_del);
return notifier_from_errno(err);
case SWITCHDEV_PORT_ATTR_SET:
err = switchdev_handle_port_attr_set(dev, ptr,
lan966x_netdevice_check,
lan966x_port_attr_set);
return notifier_from_errno(err);
}
return NOTIFY_DONE;
}
static struct notifier_block lan966x_netdevice_nb __read_mostly = {
.notifier_call = lan966x_netdevice_event,
};
struct notifier_block lan966x_switchdev_nb __read_mostly = {
.notifier_call = lan966x_switchdev_event,
};
struct notifier_block lan966x_switchdev_blocking_nb __read_mostly = {
.notifier_call = lan966x_switchdev_blocking_event,
};
void lan966x_register_notifier_blocks(void)
{
register_netdevice_notifier(&lan966x_netdevice_nb);
register_switchdev_notifier(&lan966x_switchdev_nb);
register_switchdev_blocking_notifier(&lan966x_switchdev_blocking_nb);
}
void lan966x_unregister_notifier_blocks(void)
{
unregister_switchdev_blocking_notifier(&lan966x_switchdev_blocking_nb);
unregister_switchdev_notifier(&lan966x_switchdev_nb);
unregister_netdevice_notifier(&lan966x_netdevice_nb);
}
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