Hi Roger,
On 5/20/2025 3:53 PM, Roger Quadros wrote:
This series adds AF_XDP zero coppy support to am65-cpsw driver.
Tests were performed on AM62x-sk with xdpsock application [1].
A clear improvement is seen in 64 byte packets on Transmit (txonly)
and receive (rxdrop).
1500 byte test seems to be limited by line rate (1G link) so no
improvement seen there in packet rate. A test on higher speed link
(or PHY-less setup) might be worthwile.
There is some issue during l2fwd with 64 byte packets and benchmark
results show 0. I'm still investigating this issue.
AF_XDP performance using 64 byte packets in Kpps.
Benchmark: XDP-SKB XDP-Native XDP-Native(ZeroCopy)
rxdrop 317 504 824
txonly 400 405 757
l2fwd 207 264 0
AF_XDP performance using 1500 byte packets in Kpps.
Benchmark: XDP-SKB XDP-Native XDP-Native(ZeroCopy)
rxdrop 82 82 82
txonly 82 82 82
l2fwd 82 82 82
[1]: https://github.com/xdp-project/bpf-examples/tree/master/AF_XDP-example
To:
Signed-off-by: Roger Quadros <rogerq@xxxxxxxxxx>
This series crashes Linux on am64xx-hsevm, when I tried nfs boot using
AM65-CPSW-NUSS driver:
logs:
https://gist.github.com/MeghanaMalladiTI/d655a1c8ca88113ee7f5f57d6ab0ec4c
Seems like you have reverted the fix for the same bug which was reported
by Siddharth and fixed by Julien:
https://lore.kernel.org/all/7f7fb71a-6d15-46f1-b63c-b569a2e230b7@xxxxxxxxxxxx/
reverted lines:
if (!common->ports[port].ndev)
/* FIXME should we BUG here? */
continue;
Can you please take a look at it.
---
Roger Quadros (5):
net: ethernet: ti: am65-cpsw: fix BPF Program change on multi-port CPSW
net: ethernet: ti: am65-cpsw: add XSK pool helpers
net: ethernet: ti: am65-cpsw: Add AF_XDP zero copy for RX
net: ethernet: ti: am65-cpsw: Add AF_XDP zero copy for TX
net: ethernet: ti: am65-cpsw: enable zero copy in XDP features
drivers/net/ethernet/ti/Makefile | 2 +-
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 526 +++++++++++++++++++++++++++----
drivers/net/ethernet/ti/am65-cpsw-nuss.h | 37 ++-
drivers/net/ethernet/ti/am65-cpsw-xdp.c | 155 +++++++++
4 files changed, 656 insertions(+), 64 deletions(-)
---
base-commit: 9f607dc39b6658ba8ea647bd99725e68c66071b7
change-id: 20250225-am65-cpsw-xdp-zc-2af9e4be1356
Best regards,
--
Thanks,
Meghana Malladi
