Current state of wireless hardware NAT in mt76 driver?

Installing and Using OpenWrt
1

Hardware NAT for LAN ports works fine on my XDR6088. However, when doing the same speed test on my iPhone using AX wifi, top reports 10% utilization in sys by the napi/mtk_eth-6 . So, I guess mt76 does not support wireless hardware NAT currently?

NFTable Rules:

table ip main {
	flowtable ft {
		hook ingress priority filter
		devices = { eth0, eth1, lan1, lan2, lan3, lan4, lan5, phy0-ap0, phy1-ap0, phy1-ap0.sta1 }
		flags offload
	}

	chain postrouting {
		type nat hook postrouting priority srcnat; policy accept;
		oif "eth1" masquerade
	}

	chain forward {
		type filter hook forward priority mangle; policy accept;
		meta l4proto { tcp, udp } flow add @ft
	}
}
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2

I cannot find any info about 820, but 830 does have "an integrated Wi-Fi Offload engine" according to the product page. So, the only missing piece should be the driver support.

3

Search the forum for Wireless Ethernet Dispatch.
It needs to be enabled manually but can be flaky sometimes with snapshot build.

4

Also asked here:

5

Thanks for pointing the right direction. So, 23.05 does not enable the wed feature by default. For anyone want to use this feature, you need add options mt7915e wed_enable=Y to /etc/modules.conf and reboot. Once rebooted, you should have the following in your demsg output:

[   11.763059] mt798x-wmac 18000000.wifi: attaching wed device 0 version 2
[   11.854924] platform 15010000.wed: MTK WED WO Firmware Version: DEV_000000, Build Time: 20221012175005
[   11.864275] platform 15010000.wed: MTK WED WO Chip ID 00 Region 3

You can confirm whether it's working by cat /sys/kernel/debug/ppe0/bind. Currently, the wireless offloading seems to be only working in TX direction, which reduces CPU usage from 10% to 3% when doing wireless speed tests compare 0% in wired speed tests.

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6

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