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atl1c: adjust max mtu according to Mikrotik 10/25G NIC ability 

The new Mikrotik 10/25G NIC supports jumbo frames. Jumbo frames are
supported for TSO as well.

This enables the support for mtu up to 9500 bytes.

Signed-off-by: Gatis Peisenieks <gatis@mikrotik.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gatis Peisenieks 2021-05-13 14:43:24 +03:00 committed by David S. Miller
parent d7ab6419bd
commit 545fa3fb1e
1 changed files with 12 additions and 4 deletions
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16
drivers/net/ethernet/atheros/atl1c/atl1c_main.c
View File

@ -478,6 +478,9 @@ static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
static netdev_features_t atl1c_fix_features(struct net_device *netdev,
netdev_features_t features)
{
struct atl1c_adapter *adapter = netdev_priv(netdev);
struct atl1c_hw *hw = &adapter->hw;
/*
* Since there is no support for separate rx/tx vlan accel
* enable/disable make sure tx flag is always in same state as rx.
@ -487,8 +490,10 @@ static netdev_features_t atl1c_fix_features(struct net_device *netdev,
else
features &= ~NETIF_F_HW_VLAN_CTAG_TX;
if (netdev->mtu > MAX_TSO_FRAME_SIZE)
features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
if (hw->nic_type != athr_mt) {
if (netdev->mtu > MAX_TSO_FRAME_SIZE)
features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
}
return features;
}
@ -515,9 +520,12 @@ static void atl1c_set_max_mtu(struct net_device *netdev)
case athr_l1d:
case athr_l1d_2:
netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
(ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
(ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
break;
/* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
case athr_mt:
netdev->max_mtu = 9500;
break;
/* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
default:
netdev->max_mtu = ETH_DATA_LEN;
break;