net: dsa: mv88e6xxx: Implement MTU change
The Marvell Switches support jumbo packages. So implement the
callbacks needed for changing the MTU.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index d995f5b..6f01995 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2693,6 +2693,31 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
return mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_DEFAULT_VLAN, 0);
}
+static int mv88e6xxx_get_max_mtu(struct dsa_switch *ds, int port)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+
+ if (chip->info->ops->port_set_jumbo_size)
+ return 10240;
+ return 1522;
+}
+
+static int mv88e6xxx_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+ int ret = 0;
+
+ mv88e6xxx_reg_lock(chip);
+ if (chip->info->ops->port_set_jumbo_size)
+ ret = chip->info->ops->port_set_jumbo_size(chip, port, new_mtu);
+ else
+ if (new_mtu > 1522)
+ ret = -EINVAL;
+ mv88e6xxx_reg_unlock(chip);
+
+ return ret;
+}
+
static int mv88e6xxx_port_enable(struct dsa_switch *ds, int port,
struct phy_device *phydev)
{
@@ -5525,6 +5550,8 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
.get_sset_count = mv88e6xxx_get_sset_count,
.port_enable = mv88e6xxx_port_enable,
.port_disable = mv88e6xxx_port_disable,
+ .port_max_mtu = mv88e6xxx_get_max_mtu,
+ .port_change_mtu = mv88e6xxx_change_mtu,
.get_mac_eee = mv88e6xxx_get_mac_eee,
.set_mac_eee = mv88e6xxx_set_mac_eee,
.get_eeprom_len = mv88e6xxx_get_eeprom_len,