From: Jakub Kicinski <kuba@kernel.org>
To: Gal Pressman <gal@nvidia.com>
Cc: "leon@kernel.org" <leon@kernel.org>,
"intel-wired-lan@osuosl.org" <intel-wired-lan@osuosl.org>,
Richard Cochran <richardcochran@gmail.com>,
Saeed Mahameed <saeed@kernel.org>,
"edumazet@google.com" <edumazet@google.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Michael Chan <michael.chan@broadcom.com>,
"Zulkifli,
Muhammad Husaini" <muhammad.husaini.zulkifli@intel.com>,
"davem@davemloft.net" <davem@davemloft.net>,
Andy Gospodarek <andy@greyhouse.net>,
"Ahmad Tarmizi, Noor Azura" <noor.azura.ahmad.tarmizi@intel.com>
Subject: Re: [Intel-wired-lan] [PATCH v1 0/4] Add support for DMA timestamp for non-PTP packets
Date: Thu, 29 Sep 2022 08:23:27 -0700 [thread overview]
Message-ID: <20220929082327.209d6227@kernel.org> (raw)
In-Reply-To: <6f6f4487-1c5d-de4e-0c79-452128deae0c@nvidia.com>
On Thu, 29 Sep 2022 17:46:04 +0300 Gal Pressman wrote:
> What exactly do you mean by DMA stamps?
>
> Our NIC supports two modes of operation (both TX/RX):
> - CQE timestamp (I think that's what you call DMA timestamp), where the
> timestamp is written when the completion is being written/generated.
> - Port timestamp (MAC timestamp), where the timstamp is written when the
> packet is being sent to the wire, or received from the wire. This
> doesn't account for the time the packet spent inside the NIC pipeline.
>
> So I believe the answer to your question is yes :).
Thanks! I think we should provide the config API for both Tx and Rx,
then.
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next prev parent reply other threads:[~2022-09-29 15:23 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-27 13:06 [Intel-wired-lan] [PATCH v1 0/4] Add support for DMA timestamp for non-PTP packets Muhammad Husaini Zulkifli
2022-09-27 13:06 ` [Intel-wired-lan] [PATCH v1 1/4] ethtool: Add new hwtstamp flag Muhammad Husaini Zulkifli
2022-09-28 0:11 ` Jakub Kicinski
2022-09-29 3:40 ` Zulkifli, Muhammad Husaini
2022-09-27 13:06 ` [Intel-wired-lan] [PATCH v1 2/4] net-timestamp: Increase the size of tsflags Muhammad Husaini Zulkifli
2022-09-27 13:06 ` [Intel-wired-lan] [PATCH v1 3/4] net: sock: extend SO_TIMESTAMPING for DMA Fetch Muhammad Husaini Zulkifli
2022-09-27 13:06 ` [Intel-wired-lan] [PATCH v1 4/4] igc: Add support for DMA timestamp for non-PTP packets Muhammad Husaini Zulkifli
2022-09-27 15:27 ` [Intel-wired-lan] [PATCH v1 0/4] " Andrew Lunn
2022-09-29 2:22 ` Zulkifli, Muhammad Husaini
2022-09-28 0:09 ` Jakub Kicinski
2022-09-29 2:35 ` Zulkifli, Muhammad Husaini
2022-09-29 13:56 ` Jakub Kicinski
2022-09-29 14:46 ` Gal Pressman
2022-09-29 15:23 ` Jakub Kicinski [this message]
2022-09-30 8:52 ` Zulkifli, Muhammad Husaini
2022-09-30 14:40 ` Jakub Kicinski
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