[PATCH net-next 3/4] atl1c: adjust max mtu according to Mikrotik 10/25G NIC ability
From: Gatis Peisenieks <hidden>
Date: 2021-04-19 14:35:20
Also in:
lkml
Subsystem:
atlx ethernet drivers, networking drivers, the rest · Maintainers:
Chris Snook, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> --- drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index 8b097964a035..920e408ce7b4 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c@@ -478,6 +478,8 @@ 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 +489,10 @@ 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; }
@@ -517,6 +521,9 @@ static void atl1c_set_max_mtu(struct net_device *netdev) netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); break; + 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;
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2.31.1