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net: dsa: b53: add MTU configuration support

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It looks like the Broadcom switches supported by the b53 driver don't
support precise configuration of the MTU, but just a mumbo-jumbo boolean
flag. Set that.

Also configure BCM583XX devices to send and receive jumbo frames when
ports are configured with 10/100 Mbps speed.

Signed-off-by: Murali Krishna Policharla <murali.policharla@broadcom.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Murali Krishna Policharla 2020-03-27 21:55:44 +02:00 committed by David S. Miller
parent bff33f7e2a
commit 6ae5834b98
1 changed files with 22 additions and 5 deletions
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27
drivers/net/dsa/b53/b53_common.c
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@ -699,9 +699,6 @@ int b53_configure_vlan(struct dsa_switch *ds)
b53_write16(dev, B53_VLAN_PAGE,
B53_VLAN_PORT_DEF_TAG(i), def_vid);
if (!is5325(dev) && !is5365(dev))
b53_set_jumbo(dev, dev->enable_jumbo, false);
return 0;
}
EXPORT_SYMBOL(b53_configure_vlan);
@ -807,8 +804,6 @@ static int b53_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val)
static int b53_reset_switch(struct b53_device *priv)
{
/* reset vlans */
priv->enable_jumbo = false;
memset(priv->vlans, 0, sizeof(*priv->vlans) * priv->num_vlans);
memset(priv->ports, 0, sizeof(*priv->ports) * priv->num_ports);
@ -2065,6 +2060,26 @@ int b53_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
}
EXPORT_SYMBOL(b53_set_mac_eee);
static int b53_change_mtu(struct dsa_switch *ds, int port, int mtu)
{
struct b53_device *dev = ds->priv;
bool enable_jumbo;
bool allow_10_100;
if (is5325(dev) || is5365(dev))
return -EOPNOTSUPP;
enable_jumbo = (mtu >= JMS_MIN_SIZE);
allow_10_100 = (dev->chip_id == BCM583XX_DEVICE_ID);
return b53_set_jumbo(dev, enable_jumbo, allow_10_100);
}
static int b53_get_max_mtu(struct dsa_switch *ds, int port)
{
return JMS_MAX_SIZE;
}
static const struct dsa_switch_ops b53_switch_ops = {
.get_tag_protocol = b53_get_tag_protocol,
.setup = b53_setup,
@ -2102,6 +2117,8 @@ static const struct dsa_switch_ops b53_switch_ops = {
.port_mdb_prepare = b53_mdb_prepare,
.port_mdb_add = b53_mdb_add,
.port_mdb_del = b53_mdb_del,
.port_max_mtu = b53_get_max_mtu,
.port_change_mtu = b53_change_mtu,
};
struct b53_chip_data {