Thread (6 messages) 6 messages, 4 authors, 2026-01-13

Re: [Intel-wired-lan] [PATCH iwl-next v4] idpf: export RX hardware timestamping information to XDP

From: Mina Almasry <hidden>
Date: 2026-01-11 19:19:01
Also in: bpf, intel-wired-lan, lkml

On Sat, Jan 10, 2026 at 12:36 AM Paul Menzel [off-list ref] wrote:
Dear Mina,


Thank you for your patch. Some minor comments, should you resend.
Thanks, looks like I have reviews and this is on its way, but should I
resend I will fix the minor comments.
Am 23.12.25 um 20:46 schrieb Mina Almasry via Intel-wired-lan:
quoted
From: YiFei Zhu <redacted>

The logic is similar to idpf_rx_hwtstamp, but the data is exported
as a BPF kfunc instead of appended to an skb to support grabbing
timestamps in xsk packets.

A idpf_queue_has(PTP, rxq) condition is added to check the queue
supports PTP similar to idpf_rx_process_skb_fields.

Tested using an xsk connection and checking xdp timestamps are
retreivable in received packets.
retr*ie*vable

It’d be great if you could share the commands.
I don't have easy repro to share in the commit message. The test
involves hacking up the xsk_rr Sami used for his busypolling patch to
enable xdp metadata and retrieve timestamps, or (what I did) actually
set up openonload with this patch and test onload can get the
timestamps. Let me see what I can do, but it's likely too much context
for someone unfamiliar to piece together.

-- 
Thanks,
Mina
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