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net: dsa: qca8k: implement the port MTU callbacks

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This switch has a single max frame size configuration register, so we
track the requested MTU for each port and apply the largest.

v2:
- Address review feedback from Vladimir Oltean

Signed-off-by: Jonathan McDowell <noodles@earth.li>
Acked-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jonathan McDowell
2020-07-18 17:32:14 +01:00
committed by David S. Miller
parent 2b96692bcf
commit f58d2598cf
2 changed files with 34 additions and 0 deletions
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31
drivers/net/dsa/qca8k.c
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@@ -670,6 +670,11 @@ qca8k_setup(struct dsa_switch *ds)
}
}
/* Setup our port MTUs to match power on defaults */
for (i = 0; i < QCA8K_NUM_PORTS; i++)
priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN;
qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN);
/* Flush the FDB table */
qca8k_fdb_flush(priv);
@@ -1098,6 +1103,30 @@ qca8k_port_disable(struct dsa_switch *ds, int port)
priv->port_sts[port].enabled = 0;
}
static int
qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
{
struct qca8k_priv *priv = ds->priv;
int i, mtu = 0;
priv->port_mtu[port] = new_mtu;
for (i = 0; i < QCA8K_NUM_PORTS; i++)
if (priv->port_mtu[port] > mtu)
mtu = priv->port_mtu[port];
/* Include L2 header / FCS length */
qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN);
return 0;
}
static int
qca8k_port_max_mtu(struct dsa_switch *ds, int port)
{
return QCA8K_MAX_MTU;
}
static int
qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
u16 port_mask, u16 vid)
@@ -1174,6 +1203,8 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
.set_mac_eee = qca8k_set_mac_eee,
.port_enable = qca8k_port_enable,
.port_disable = qca8k_port_disable,
.port_change_mtu = qca8k_port_change_mtu,
.port_max_mtu = qca8k_port_max_mtu,
.port_stp_state_set = qca8k_port_stp_state_set,
.port_bridge_join = qca8k_port_bridge_join,
.port_bridge_leave = qca8k_port_bridge_leave,