Hi Roger,
On 11/10/25 03:07, 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
ZjQcmQRYFpfptBannerStart
This message was sent from outside of Texas Instruments.
Do not click links or open attachments unless you recognize the source
of this email and know the content is safe.
Report Suspicious
<https://us-phishalarm-ewt.proofpoint.com/EWT/v1/G3vK!
u7dqXRfP1k07KyXOF3NDf8vo0my_AFaH4vPAPLVnKCsqFWj_bXKNsRmhTJBE82Rrr_w736hROV-tgpjEGb6O7cQAClKjG9x9il73ZT70$>
ZjQcmQRYFpfptBannerEnd
This series adds AF_XDP zero coppy support to am65-cpsw driver.
Tests were performed on AM62x-sk with xdpsock application [1].
A clear improvement is seen in 64 byte packets on Transmit (txonly)
and receive (rxdrop).
1500 byte test seems to be limited by line rate (1G link) so no
improvement seen there in packet rate. A test on higher speed link
(or PHY-less setup) might be worthwile.
There is some issue during l2fwd with 64 byte packets and benchmark
results show 0. This issue needs to be debugged further.
A 512 byte l2fwd test result has been added to compare instead.
AF_XDP performance using 64 byte packets in Kpps.
Benchmark: XDP-SKB XDP-Native XDP-Native(ZeroCopy)
rxdrop 322 491 845
txonly 390 394 723
l2fwd 205 257 0
AF_XDP performance using 512 byte packets in Kpps.
l2fwd 140 167 231
AF_XDP performance using 1500 byte packets in Kpps.
Benchmark: XDP-SKB XDP-Native XDP-Native(ZeroCopy)
rxdrop 82 82 82
txonly 82 82 82
l2fwd 82 82 82
[1]:https://urldefense.com/v3/__https://github.com/xdp-project/bpf-examples/
tree/master/AF_XDP-example__;!!G3vK!
SX4J82NfOn_sfwizSTYO-8W3GRuffFIHyCngO1J2CT4Alea18pIGiBI4l5XKFKVUbxESDgb4GkCb$ <https://urldefense.com/v3/__https://github.com/xdp-project/bpf-examples/tree/master/AF_XDP-example__;!!G3vK!SX4J82NfOn_sfwizSTYO-8W3GRuffFIHyCngO1J2CT4Alea18pIGiBI4l5XKFKVUbxESDgb4GkCb$>
Signed-off-by: Roger Quadros <[email protected]>
---
This series causes nfs boot failure for am62lxx-evm:
https://gist.github.com/MeghanaMalladiTI/dda232ebe6c24554e933085513ce8b33
Due to descriptor leakage during Rx teardown. I have faced similar
problem in ICSSG and a fix similar to this is needed for CPSW as well.
Please incorporate this fix as well in your v3:
https://gist.github.com/MeghanaMalladiTI/c5467e2a5c9d4ebdc5e71e3720b6524d
Changes in v2:
- Prevent crash on systems with 1 of 2 ports disabled in device tree. check
for valid ndev before registering/unregistering XDP RXQ.
Reported-by: Meghana Malladi <[email protected]>
- Retain page pool on XDP program exchangae so we don't have to re-alloacate
memory.
- Fix clearing of irq_disabled flag in am65_cpsw_nuss_rx_poll().
- Link to v1:https://urldefense.com/v3/__https://lore.kernel.org/r/20250520-am65-
[email protected]__;!!G3vK!
SX4J82NfOn_sfwizSTYO-8W3GRuffFIHyCngO1J2CT4Alea18pIGiBI4l5XKFKVUbxESDgAECR9g$ <https://urldefense.com/v3/__https://lore.kernel.org/r/[email protected]__;!!G3vK!SX4J82NfOn_sfwizSTYO-8W3GRuffFIHyCngO1J2CT4Alea18pIGiBI4l5XKFKVUbxESDgAECR9g$>
---
Roger Quadros (7):
net: ethernet: ti: am65-cpsw: fix BPF Program change on multi-port CPSW
net: ethernet: ti: am65-cpsw: Retain page_pool on XDP program exchange
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
net: ethernet: ti: am65-cpsw: Fix clearing of irq_disabled flag in
rx_poll
drivers/net/ethernet/ti/Makefile | 2 +-
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 583 ++++++++++++++++++++++++++-----
drivers/net/ethernet/ti/am65-cpsw-nuss.h | 37 +-
drivers/net/ethernet/ti/am65-cpsw-xdp.c | 155 ++++++++
4 files changed, 692 insertions(+), 85 deletions(-)
---
base-commit: a0c3aefb08cd81864b17c23c25b388dba90b9dad
change-id: 20250225-am65-cpsw-xdp-zc-2af9e4be1356
Best regards,
--
Roger Quadros <[email protected]>
