Commit 6ae5834b authored by Murali Krishna Policharla's avatar Murali Krishna Policharla Committed by David S. Miller
Browse files

net: dsa: b53: add MTU configuration support 



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: default avatarMurali Krishna Policharla <murali.policharla@broadcom.com>
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bff33f7e

drivers/net/dsa/b53/b53_common.c

+22 −5
Original line number Diff line number Diff line
@@ -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 {

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