From: "Arinzon, David" <darinzon@amazon.com>
To: Leon Romanovsky <leon@kernel.org>, Andrew Lunn <andrew@lunn.ch>
Cc: David Woodhouse <dwmw2@infradead.org>,
David Miller <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
Richard Cochran <richardcochran@gmail.com>,
"Machulsky, Zorik" <zorik@amazon.com>,
"Matushevsky, Alexander" <matua@amazon.com>,
"Bshara, Saeed" <saeedb@amazon.com>,
"Wilson, Matt" <msw@amazon.com>,
"Liguori, Anthony" <aliguori@amazon.com>,
"Bshara, Nafea" <nafea@amazon.com>,
"Schmeilin, Evgeny" <evgenys@amazon.com>,
"Belgazal, Netanel" <netanel@amazon.com>,
"Saidi, Ali" <alisaidi@amazon.com>,
"Herrenschmidt, Benjamin" <benh@amazon.com>,
"Kiyanovski, Arthur" <akiyano@amazon.com>,
"Dagan, Noam" <ndagan@amazon.com>,
"Bernstein, Amit" <amitbern@amazon.com>,
"Allen, Neil" <shayagr@amazon.com>,
"Ostrovsky, Evgeny" <evostrov@amazon.com>,
"Tabachnik, Ofir" <ofirt@amazon.com>,
"Machnikowski, Maciek" <maciek@machnikowski.net>,
Rahul Rameshbabu <rrameshbabu@nvidia.com>,
Gal Pressman <gal@nvidia.com>,
Vadim Fedorenko <vadim.fedorenko@linux.dev>
Subject: RE: [PATCH v8 net-next 5/5] net: ena: Add PHC documentation
Date: Wed, 26 Mar 2025 15:32:00 +0000 [thread overview]
Message-ID: <db859110a34d440fb36c52a7ff99cb65@amazon.com> (raw)
In-Reply-To: <20250305175243.GN1955273@unreal>
> > > If you read the actual code in that patch, there's a hint though.
> > > Because the actual process in ena_phc_enable_set() does the following:
> > >
> > > + ena_destroy_device(adapter, false);
> > > + rc = ena_restore_device(adapter);
> > >
> > > Is that actually tearing down the whole netdev and recreating it
> > > when the PHC enable is flipped?
> >
> > Well Jakub said it is a pure clock, not related to the netdev.
The PHC device is a PTP clock integrated with the networking device under the same PCI device.
As previously mentioned in this thread, enabling or disabling the ENA PHC requires reconfiguring the ENA network device,
which involves tearing down and recreating the netdev.
This necessitates having a separate control knob.
Thanks,
David
>
> So why are you ready to merge the code which is not netdev, doesn't have
> any association with netdev and doesn't follow netdev semantics (no custom
> sysfs files)?
>
> Thanks
next prev parent reply other threads:[~2025-03-26 15:32 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-04 19:04 [PATCH v8 net-next 0/5] PHC support in ENA driver David Arinzon
2025-03-04 19:05 ` [PATCH v8 net-next 1/5] net: ena: Add PHC support in the " David Arinzon
2025-03-04 19:05 ` [PATCH v8 net-next 2/5] net: ena: PHC silent reset David Arinzon
2025-03-04 19:05 ` [PATCH v8 net-next 3/5] net: ena: PHC enable through sysfs David Arinzon
2025-03-04 19:05 ` [PATCH v8 net-next 4/5] net: ena: PHC stats " David Arinzon
2025-03-04 21:07 ` Andrew Lunn
2025-03-04 22:58 ` Jakub Kicinski
2025-03-05 15:33 ` Andrew Lunn
2025-03-06 2:36 ` Jakub Kicinski
2025-03-06 7:15 ` Leon Romanovsky
2025-03-06 15:40 ` Andrew Lunn
2025-03-06 17:31 ` Leon Romanovsky
2025-03-26 15:39 ` Arinzon, David
2025-03-04 19:05 ` [PATCH v8 net-next 5/5] net: ena: Add PHC documentation David Arinzon
2025-03-04 21:10 ` Andrew Lunn
2025-03-05 12:50 ` Arinzon, David
2025-03-05 12:59 ` [EXTERNAL] " David Woodhouse
2025-03-05 15:35 ` Andrew Lunn
2025-03-05 17:52 ` Leon Romanovsky
2025-03-26 15:32 ` Arinzon, David [this message]
2025-03-27 11:15 ` Leon Romanovsky
2025-03-27 12:01 ` David Woodhouse
2025-04-01 8:02 ` David Woodhouse
2025-04-01 8:46 ` David Woodhouse
2025-04-02 16:23 ` Jakub Kicinski
2025-04-02 19:38 ` Leon Romanovsky
2025-04-07 7:01 ` Arinzon, David
2025-04-07 14:02 ` Andrew Lunn
2025-04-07 16:27 ` Jakub Kicinski
2025-04-08 14:47 ` Richard Cochran
2025-04-08 15:24 ` Jakub Kicinski
2025-04-10 4:07 ` Richard Cochran
2025-04-10 16:01 ` Jakub Kicinski
2025-03-04 23:00 ` [PATCH v8 net-next 0/5] PHC support in ENA driver Jakub Kicinski
2025-03-05 6:34 ` Arinzon, David
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