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| author | Clément Léger <clement.leger@bootlin.com> | 2021-12-09 18:49:10 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-11 07:56:57 +0300 |
| commit | de5841e1c93f2275bb73c471255b718b5ec2f0ec (patch) | |
| tree | 68f4fdafe8cf61809b57df6be062276f3ce557a7 /drivers/net/ethernet/mscc/ocelot_net.c | |
| parent | b471a71e525c73608a6ae5a3fdd2a5d1224da6a9 (diff) | |
| download | linux-de5841e1c93f2275bb73c471255b718b5ec2f0ec.tar.xz | |
net: ocelot: add support for ndo_change_mtu
This commit adds support for changing MTU for the ocelot register based
interface. For ocelot, JUMBO frame size can be set up to 25000 bytes
but has been set to 9000 which is a saner value and allows for maximum
gain of performance with FDMA.
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/mscc/ocelot_net.c')
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot_net.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c index 0fcf359a6975..881e4d8e7f8e 100644 --- a/drivers/net/ethernet/mscc/ocelot_net.c +++ b/drivers/net/ethernet/mscc/ocelot_net.c @@ -764,10 +764,23 @@ static int ocelot_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) return phy_mii_ioctl(dev->phydev, ifr, cmd); } +static int ocelot_change_mtu(struct net_device *dev, int new_mtu) +{ + struct ocelot_port_private *priv = netdev_priv(dev); + struct ocelot_port *ocelot_port = &priv->port; + struct ocelot *ocelot = ocelot_port->ocelot; + + ocelot_port_set_maxlen(ocelot, priv->chip_port, new_mtu); + WRITE_ONCE(dev->mtu, new_mtu); + + return 0; +} + static const struct net_device_ops ocelot_port_netdev_ops = { .ndo_open = ocelot_port_open, .ndo_stop = ocelot_port_stop, .ndo_start_xmit = ocelot_port_xmit, + .ndo_change_mtu = ocelot_change_mtu, .ndo_set_rx_mode = ocelot_set_rx_mode, .ndo_set_mac_address = ocelot_port_set_mac_address, .ndo_get_stats64 = ocelot_get_stats64, @@ -1670,6 +1683,7 @@ int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target, dev->netdev_ops = &ocelot_port_netdev_ops; dev->ethtool_ops = &ocelot_ethtool_ops; + dev->max_mtu = OCELOT_JUMBO_MTU; dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXFCS | NETIF_F_HW_TC; |