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net: dsa: support switchdev ageing time attr

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Add a new function for DSA drivers to handle the switchdev
SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME attribute.

The ageing time is passed as milliseconds.

Also because we can have multiple logical bridges on top of a physical
switch and ageing time are switch-wide, call the driver function with
the fastest ageing time in use on the chip instead of the requested one.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2016-07-18 20:45:38 -04:00 committed by David S. Miller
parent 8ec61c7f7c
commit 34a79f63bb
2 changed files with 43 additions and 0 deletions
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2
include/net/dsa.h
View File

@ -141,6 +141,7 @@ struct dsa_switch_tree {
struct dsa_port {
struct net_device *netdev;
struct device_node *dn;
unsigned int ageing_time;
};
struct dsa_switch {
@ -329,6 +330,7 @@ struct dsa_switch_driver {
/*
* Bridge integration
*/
int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
int (*port_bridge_join)(struct dsa_switch *ds, int port,
struct net_device *bridge);
void (*port_bridge_leave)(struct dsa_switch *ds, int port);

41
net/dsa/slave.c
View File

@ -333,6 +333,44 @@ static int dsa_slave_vlan_filtering(struct net_device *dev,
return 0;
}
static int dsa_fastest_ageing_time(struct dsa_switch *ds,
unsigned int ageing_time)
{
int i;
for (i = 0; i < DSA_MAX_PORTS; ++i) {
struct dsa_port *dp = &ds->ports[i];
if (dp && dp->ageing_time && dp->ageing_time < ageing_time)
ageing_time = dp->ageing_time;
}
return ageing_time;
}
static int dsa_slave_ageing_time(struct net_device *dev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time);
unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
/* bridge skips -EOPNOTSUPP, so skip the prepare phase */
if (switchdev_trans_ph_prepare(trans))
return 0;
/* Keep the fastest ageing time in case of multiple bridges */
ds->ports[p->port].ageing_time = ageing_time;
ageing_time = dsa_fastest_ageing_time(ds, ageing_time);
if (ds->drv->set_ageing_time)
return ds->drv->set_ageing_time(ds, ageing_time);
return 0;
}
static int dsa_slave_port_attr_set(struct net_device *dev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
@ -346,6 +384,9 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
ret = dsa_slave_vlan_filtering(dev, attr, trans);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
ret = dsa_slave_ageing_time(dev, attr, trans);
break;
default:
ret = -EOPNOTSUPP;
break;