Commit f9c961ef authored by Rui Salvaterra's avatar Rui Salvaterra Committed by Tony Nguyen
Browse files

igc: enable HW vlan tag insertion/stripping by default 



This is enabled by default in other Intel drivers I've checked (e1000, e1000e,
iavf, igb and ice). Fixes an out-of-the-box performance issue when running
OpenWrt on typical mini-PCs with igc-supported Ethernet controllers and 802.1Q
VLAN configurations, as ethtool isn't part of the default packages and sane
defaults are expected.

In my specific case, with an Intel N100-based machine with four I226-V Ethernet
controllers, my upload performance increased from under 30 Mb/s to the expected
~1 Gb/s.

Signed-off-by: default avatarRui Salvaterra <rsalvaterra@gmail.com>
Reviewed-by: default avatarSimon Horman <horms@kernel.org>
Reviewed-by: default avatarVitaly Lifshits <vitaly.lifshits@intel.com>
Reviewed-by: default avatarKurt Kanzenbach <kurt@linutronix.de>
Tested-by: default avatarMor Bar-Gabay <morx.bar.gabay@intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
parent cdcb3804

drivers/net/ethernet/intel/igc/igc_main.c

+3 −0
Original line number Diff line number Diff line
@@ -7125,6 +7125,9 @@ static int igc_probe(struct pci_dev *pdev, 
	netdev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |

			       NETDEV_XDP_ACT_XSK_ZEROCOPY;



	/* enable HW vlan tag insertion/stripping by default */

	netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;



	/* MTU range: 68 - 9216 */

	netdev->min_mtu = ETH_MIN_MTU;

	netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;