From: Ferruh Yigit <ferruh.yigit@amd.com>
To: Huisong Li <lihuisong@huawei.com>,
dev@dpdk.org, Gagandeep Singh <g.singh@nxp.com>,
Hemant Agrawal <hemant.agrawal@nxp.com>
Cc: thomas@monjalon.net, andrew.rybchenko@oktetlabs.ru,
liuyonglong@huawei.com
Subject: Re: [PATCH v3 0/2] ethdev: add the check for PTP capability
Date: Fri, 15 Sep 2023 18:46:29 +0100 [thread overview]
Message-ID: <1834a6a9-ef92-4a67-a987-490151cf5380@amd.com> (raw)
In-Reply-To: <20230817084226.55327-1-lihuisong@huawei.com>
On 8/17/2023 9:42 AM, Huisong Li wrote:
> From the first version of ptpclient, it seems that this example assume that
> the PMDs support the PTP feature and enable PTP by default. Please see
> commit ab129e9065a5 ("examples/ptpclient: add minimal PTP client")
> which are introduced in 2015.
>
> And two years later, Rx HW timestamp offload was introduced to enable or
> disable PTP feature in HW via rte_eth_rxmode. Please see
> commit 42ffc45aa340 ("ethdev: add Rx HW timestamp capability").
>
Hi Huisong,
As far as I know this offload is not for PTP.
PTP and TIMESTAMP are different.
PTP is a protocol for time sync.
Rx TIMESTAMP offload is to ask HW to add timestamp to mbuf.
> And then about four years later, ptpclient enable Rx timestamp offload
> because some PMDs require this offload to enable. Please see
> commit 7a04a4f67dca ("examples/ptpclient: enable Rx timestamp offload").
>
dpaa2 seems using TIMESTAMP offload and PTP together, hence they updated
ptpclient sample to set TIMESTAMP offload.
We need to clarify dpaa2 usage.
> By all the records, this is more like a process of perfecting PTP feature.
> Not all network adaptors support PTP feature. So adding the check for PTP
> capability in ethdev layer is necessary.
>
Nope, as PTP (IEEE1588/802.1AS) implemented as dev_ops, and ops already
checked, so no additional check is needed.
We just need to clarify TIMESTAMP offload and PTP usage and find out
what is causing confusion.
I would be great if you can help on clarification, and update
documentation or API comments, or what ever required, for this.
> ---
> v3:
> - patch [2/3] for hns3 has been applied and so remove it.
> - ops pointer check is closer to usage.
>
> Huisong Li (2):
> examples/ptpclient: add the check for PTP capability
> ethdev: add the check for the valitity of timestamp offload
>
> examples/ptpclient/ptpclient.c | 5 +++
> lib/ethdev/rte_ethdev.c | 57 +++++++++++++++++++++++++++++++++-
> 2 files changed, 61 insertions(+), 1 deletion(-)
>
next prev parent reply other threads:[~2023-09-15 17:46 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-28 13:39 [PATCH 0/3] some bugfixes for PTP Dongdong Liu
2022-06-28 13:39 ` [PATCH 1/3] examples/ptpclient: add the check for PTP capability Dongdong Liu
2022-06-28 13:39 ` [PATCH 2/3] net/hns3: fix fail to receive PTP packet Dongdong Liu
2022-06-28 13:39 ` [PATCH 3/3] ethdev: add the check for the valitity of timestamp offload Dongdong Liu
2022-07-02 8:17 ` [PATCH v2 0/3] some bugfixes for PTP Dongdong Liu
2022-07-02 8:17 ` [PATCH v2 1/3] examples/ptpclient: add the check for PTP capability Dongdong Liu
2022-07-02 8:17 ` [PATCH v2 2/3] net/hns3: fix fail to receive PTP packet Dongdong Liu
2022-07-02 8:17 ` [PATCH v2 3/3] ethdev: add the check for the valitity of timestamp offload Dongdong Liu
2022-07-06 14:57 ` Andrew Rybchenko
2022-07-07 2:05 ` lihuisong (C)
2023-08-17 8:42 ` [PATCH v3 0/2] ethdev: add the check for PTP capability Huisong Li
2023-08-17 8:42 ` [PATCH v3 1/2] examples/ptpclient: " Huisong Li
2023-09-15 17:29 ` Ferruh Yigit
2023-09-21 9:18 ` lihuisong (C)
2023-09-21 11:02 ` Ferruh Yigit
2023-09-21 11:22 ` Hemant Agrawal
2023-10-20 4:05 ` lihuisong (C)
2023-09-21 11:36 ` lihuisong (C)
2023-08-17 8:42 ` [PATCH v3 2/2] ethdev: add the check for the valitity of timestamp offload Huisong Li
2023-09-15 17:46 ` Ferruh Yigit [this message]
2023-09-21 10:02 ` [PATCH v3 0/2] ethdev: add the check for PTP capability lihuisong (C)
2023-09-21 11:06 ` Ferruh Yigit
2023-09-21 11:17 ` Hemant Agrawal
2023-10-20 3:58 ` lihuisong (C)
2023-11-01 23:39 ` Ferruh Yigit
2023-11-23 11:40 ` lihuisong (C)
2023-11-01 23:39 ` Ferruh Yigit
2023-09-21 11:59 ` lihuisong (C)
2023-11-01 23:39 ` Ferruh Yigit
2023-11-23 11:56 ` lihuisong (C)
2024-01-11 6:25 ` lihuisong (C)
2024-01-26 16:54 ` Ferruh Yigit
2024-01-27 1:52 ` lihuisong (C)
2024-01-29 11:16 ` Ferruh Yigit
2024-01-29 13:58 ` lihuisong (C)
2024-01-29 15:00 ` Ferruh Yigit
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1834a6a9-ef92-4a67-a987-490151cf5380@amd.com \
--to=ferruh.yigit@amd.com \
--cc=andrew.rybchenko@oktetlabs.ru \
--cc=dev@dpdk.org \
--cc=g.singh@nxp.com \
--cc=hemant.agrawal@nxp.com \
--cc=lihuisong@huawei.com \
--cc=liuyonglong@huawei.com \
--cc=thomas@monjalon.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).