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mlxsw: spectrum_switchdev: Add support for learning FDB through notification

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Add support for learning FDB through notification. The driver defers
the hardware update via ordered work queue. Support for stacked devices
is also provided. In case of a successful FDB add a notification is
sent back to bridge.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arkadi Sharshevsky 2017-06-08 08:44:20 +02:00 committed by David S. Miller
parent 1b40dc3d86
commit af06137892
3 changed files with 139 additions and 1 deletions
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2
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View file

@ -3706,7 +3706,7 @@ struct mlxsw_sp *mlxsw_sp_lower_get(struct net_device *dev)
return mlxsw_sp_port ? mlxsw_sp_port->mlxsw_sp : NULL;
}
static struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find_rcu(struct net_device *dev)
struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find_rcu(struct net_device *dev)
{
struct mlxsw_sp_port *mlxsw_sp_port;

1
drivers/net/ethernet/mellanox/mlxsw/spectrum.h
View file

@ -361,6 +361,7 @@ struct mlxsw_sp *mlxsw_sp_lower_get(struct net_device *dev);
struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find(struct net_device *dev);
struct mlxsw_sp_port *mlxsw_sp_port_lower_dev_hold(struct net_device *dev);
void mlxsw_sp_port_dev_put(struct mlxsw_sp_port *mlxsw_sp_port);
struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find_rcu(struct net_device *dev);
/* spectrum_dcb.c */
#ifdef CONFIG_MLXSW_SPECTRUM_DCB

137
drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
View file

@ -1181,6 +1181,43 @@ mlxsw_sp_port_fdb_static_add(struct mlxsw_sp_port *mlxsw_sp_port,
true, false);
}
static int
mlxsw_sp_port_fdb_set(struct mlxsw_sp_port *mlxsw_sp_port,
struct switchdev_notifier_fdb_info *fdb_info, bool adding)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct net_device *orig_dev = fdb_info->info.dev;
struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan;
struct mlxsw_sp_bridge_device *bridge_device;
struct mlxsw_sp_bridge_port *bridge_port;
u16 fid_index, vid;
bridge_port = mlxsw_sp_bridge_port_find(mlxsw_sp->bridge, orig_dev);
if (!bridge_port)
return -EINVAL;
bridge_device = bridge_port->bridge_device;
mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_bridge(mlxsw_sp_port,
bridge_device,
fdb_info->vid);
if (!mlxsw_sp_port_vlan)
return 0;
fid_index = mlxsw_sp_fid_index(mlxsw_sp_port_vlan->fid);
vid = mlxsw_sp_port_vlan->vid;
if (!bridge_port->lagged)
return mlxsw_sp_port_fdb_uc_op(mlxsw_sp,
bridge_port->system_port,
fdb_info->addr, fid_index,
adding, false);
else
return mlxsw_sp_port_fdb_uc_lag_op(mlxsw_sp,
bridge_port->lag_id,
fdb_info->addr, fid_index,
vid, adding, false);
}
static int mlxsw_sp_port_mdb_op(struct mlxsw_sp *mlxsw_sp, const char *addr,
u16 fid, u16 mid, bool adding)
{
@ -2013,6 +2050,97 @@ static void mlxsw_sp_fdb_notify_work(struct work_struct *work)
mlxsw_sp_fdb_notify_work_schedule(mlxsw_sp);
}
struct mlxsw_sp_switchdev_event_work {
struct work_struct work;
struct switchdev_notifier_fdb_info fdb_info;
struct net_device *dev;
unsigned long event;
};
static void mlxsw_sp_switchdev_event_work(struct work_struct *work)
{
struct mlxsw_sp_switchdev_event_work *switchdev_work =
container_of(work, struct mlxsw_sp_switchdev_event_work, work);
struct net_device *dev = switchdev_work->dev;
struct switchdev_notifier_fdb_info *fdb_info;
struct mlxsw_sp_port *mlxsw_sp_port;
int err;
rtnl_lock();
mlxsw_sp_port = mlxsw_sp_port_dev_lower_find(dev);
if (!mlxsw_sp_port)
goto out;
switch (switchdev_work->event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
fdb_info = &switchdev_work->fdb_info;
err = mlxsw_sp_port_fdb_set(mlxsw_sp_port, fdb_info, true);
if (err)
break;
mlxsw_sp_fdb_call_notifiers(SWITCHDEV_FDB_OFFLOADED,
fdb_info->addr,
fdb_info->vid, dev);
break;
case SWITCHDEV_FDB_DEL_TO_DEVICE:
fdb_info = &switchdev_work->fdb_info;
mlxsw_sp_port_fdb_set(mlxsw_sp_port, fdb_info, false);
break;
}
out:
rtnl_unlock();
kfree(switchdev_work->fdb_info.addr);
kfree(switchdev_work);
dev_put(dev);
}
/* Called under rcu_read_lock() */
static int mlxsw_sp_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
struct mlxsw_sp_switchdev_event_work *switchdev_work;
struct switchdev_notifier_fdb_info *fdb_info = ptr;
if (!mlxsw_sp_port_dev_lower_find_rcu(dev))
return NOTIFY_DONE;
switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
if (!switchdev_work)
return NOTIFY_BAD;
INIT_WORK(&switchdev_work->work, mlxsw_sp_switchdev_event_work);
switchdev_work->dev = dev;
switchdev_work->event = event;
switch (event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
case SWITCHDEV_FDB_DEL_TO_DEVICE:
memcpy(&switchdev_work->fdb_info, ptr,
sizeof(switchdev_work->fdb_info));
switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
fdb_info->addr);
/* Take a reference on the device. This can be either
* upper device containig mlxsw_sp_port or just a
* mlxsw_sp_port
*/
dev_hold(dev);
break;
default:
kfree(switchdev_work);
return NOTIFY_DONE;
}
mlxsw_core_schedule_work(&switchdev_work->work);
return NOTIFY_DONE;
}
static struct notifier_block mlxsw_sp_switchdev_notifier = {
.notifier_call = mlxsw_sp_switchdev_event,
};
static int mlxsw_sp_fdb_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_bridge *bridge = mlxsw_sp->bridge;
@ -2023,6 +2151,13 @@ static int mlxsw_sp_fdb_init(struct mlxsw_sp *mlxsw_sp)
dev_err(mlxsw_sp->bus_info->dev, "Failed to set default ageing time\n");
return err;
}
err = register_switchdev_notifier(&mlxsw_sp_switchdev_notifier);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to register switchdev notifier\n");
return err;
}
INIT_DELAYED_WORK(&bridge->fdb_notify.dw, mlxsw_sp_fdb_notify_work);
bridge->fdb_notify.interval = MLXSW_SP_DEFAULT_LEARNING_INTERVAL;
mlxsw_sp_fdb_notify_work_schedule(mlxsw_sp);
@ -2032,6 +2167,8 @@ static int mlxsw_sp_fdb_init(struct mlxsw_sp *mlxsw_sp)
static void mlxsw_sp_fdb_fini(struct mlxsw_sp *mlxsw_sp)
{
cancel_delayed_work_sync(&mlxsw_sp->bridge->fdb_notify.dw);
unregister_switchdev_notifier(&mlxsw_sp_switchdev_notifier);
}
int mlxsw_sp_switchdev_init(struct mlxsw_sp *mlxsw_sp)