On 3/13/26 16:01, Florian Fainelli wrote:

On 3/13/26 02:20, Nicolai Buchwitz wrote:

quoted

Add XDP support to the bcmgenet driver, covering XDP_PASS, XDP_DROP,
XDP_TX, XDP_REDIRECT, and ndo_xdp_xmit.

The first patch converts the RX path from the existing kmalloc-based
allocation to page_pool, which is a prerequisite for XDP. The remaining
patches incrementally add XDP functionality and per-action statistics.

Tested on Raspberry Pi CM4 (BCM2711, bcmgenet, 1Gbps link):
- XDP_PASS: 943 Mbit/s TX, 935 Mbit/s RX (no regression vs baseline)
- XDP_PASS latency: 0.164ms avg, 0% packet loss
- XDP_DROP: all inbound traffic blocked as expected
- XDP_TX: TX counter increments (packet reflection working)
- Link flap with XDP attached: no errors
- Program swap under iperf3 load: no errors

This is very nice, thanks for doing that work! If the network is brought 
up and there is a background iperf3 client transmitting data, and then 
you issue "reboot -f", you will see the following NPD:

Sorry to flood you with more messages, after a little while I see those 
showing up on the console, is that intended?

# [ 4322.017024] page_pool_release_retry() stalled pool shutdown: id 5, 
256 inflight 4289 sec
[ 4331.297004] page_pool_release_retry() stalled pool shutdown: id 6, 
256 inflight 60 sec
-- 
Florian