Merge branch 'add-af_xdp-zero-copy-support'

Merge branch 'add-af_xdp-zero-copy-support'

Meghana Malladi says:

====================
Add AF_XDP zero copy support

This series adds AF_XDP zero coppy support to icssg driver.

Tests were performed on AM64x-EVM with xdpsock application [1].

A clear improvement is seen Transmit (txonly) and receive (rxdrop)
for 64 byte packets. 1500 byte test seems to be limited by line
rate (1G link) so no improvement seen there in packet rate

Having some issue with l2fwd as the benchmarking numbers show 0
for 64 byte packets after forwading first batch packets and I am
currently looking into it.

AF_XDP performance using 64 byte packets in Kpps.
AF_XDP performance using 64 byte packets in Kpps.
Benchmark:	XDP-SKB		XDP-Native	XDP-Native(ZeroCopy)
rxdrop		253		473		656
txonly		350		354		855
l2fwd 		178		240		0

AF_XDP performance using 1500 byte packets in Kpps.
Benchmark:	XDP-SKB		XDP-Native	XDP-Native(ZeroCopy)
rxdrop		82		82		82
txonly		81		82		82
l2fwd 		81		82		82

[1]: https://github.com/xdp-project/bpf-examples/tree/master/AF_XDP-example
v5: https://lore.kernel.org/all/20251111101523.3160680-1-m-malladi@ti.com/
====================

Link: https://patch.msgid.link/20251118135542.380574-1-m-malladi@ti.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>