From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: "Marek Behún" <kabel@kernel.org>
Cc: Vladimir Oltean <olteanv@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Alvin __ipraga <alsi@bang-olufsen.dk>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Claudiu Manoil <claudiu.manoil@nxp.com>,
Daniel Scally <djrscally@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
DENG Qingfang <dqfext@gmail.com>,
Eric Dumazet <edumazet@google.com>,
Florian Fainelli <f.fainelli@gmail.com>,
George McCollister <george.mccollister@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Hauke Mehrtens <hauke@hauke-m.de>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Jakub Kicinski <kuba@kernel.org>,
Kurt Kanzenbach <kurt@linutronix.de>,
Landen Chao <Landen.Chao@mediatek.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
Matthias Brugger <matthias.bgg@gmail.com>,
netdev@vger.kernel.org, Paolo Abeni <pabeni@redhat.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Sean Wang <sean.wang@mediatek.com>,
UNGLinuxDriver@microchip.com,
Vivien Didelot <vivien.didelot@gmail.com>,
Woojung Huh <woojung.huh@microchip.com>
Subject: Re: [PATCH net-next 3/6] net: dsa: add support for retrieving the interface mode
Date: Fri, 22 Jul 2022 14:23:18 +0100 [thread overview]
Message-ID: <YtqkxklImfR9gW1Z@shell.armlinux.org.uk> (raw)
In-Reply-To: <20220722145936.497ac73f@dellmb>
On Fri, Jul 22, 2022 at 02:59:36PM +0200, Marek Behún wrote:
> The 2.5GBASE-X PCS does not support Clause 37 Auto-Negotiation.
> Hence, the 1000BASE-X PCS is expected to have its Clause 37
> Auto-Negotiation functionality disabled so that the /C/ ordered set
> will not be transmitted. If a 2.5GBASE-X PCS receives /C/ ordered
> set, then undefined behavior may occur.
> ...
The reason that's probably stated is because there hasn't been any
standardisation of it, different implementations behave differently,
so they can't define a standard behaviour without breaking what's
already out there.
With mvneta, the reality is that the 2.5G speed is implemented by
changing the clock configuration in the COMPHY block (serdes) - which
basically clocks everything 2.5x faster. I seem to remember mvpp2 is
the same deal.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
WARNING: multiple messages have this Message-ID (diff)
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: "Marek Behún" <kabel@kernel.org>
Cc: Vladimir Oltean <olteanv@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Alvin __ipraga <alsi@bang-olufsen.dk>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Claudiu Manoil <claudiu.manoil@nxp.com>,
Daniel Scally <djrscally@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
DENG Qingfang <dqfext@gmail.com>,
Eric Dumazet <edumazet@google.com>,
Florian Fainelli <f.fainelli@gmail.com>,
George McCollister <george.mccollister@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Hauke Mehrtens <hauke@hauke-m.de>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Jakub Kicinski <kuba@kernel.org>,
Kurt Kanzenbach <kurt@linutronix.de>,
Landen Chao <Landen.Chao@mediatek.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
Matthias Brugger <matthias.bgg@gmail.com>,
netdev@vger.kernel.org, Paolo Abeni <pabeni@redhat.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Sean Wang <sean.wang@mediatek.com>,
UNGLinuxDriver@microchip.com,
Vivien Didelot <vivien.didelot@gmail.com>,
Woojung Huh <woojung.huh@microchip.com>
Subject: Re: [PATCH net-next 3/6] net: dsa: add support for retrieving the interface mode
Date: Fri, 22 Jul 2022 14:23:18 +0100 [thread overview]
Message-ID: <YtqkxklImfR9gW1Z@shell.armlinux.org.uk> (raw)
In-Reply-To: <20220722145936.497ac73f@dellmb>
On Fri, Jul 22, 2022 at 02:59:36PM +0200, Marek Behún wrote:
> The 2.5GBASE-X PCS does not support Clause 37 Auto-Negotiation.
> Hence, the 1000BASE-X PCS is expected to have its Clause 37
> Auto-Negotiation functionality disabled so that the /C/ ordered set
> will not be transmitted. If a 2.5GBASE-X PCS receives /C/ ordered
> set, then undefined behavior may occur.
> ...
The reason that's probably stated is because there hasn't been any
standardisation of it, different implementations behave differently,
so they can't define a standard behaviour without breaking what's
already out there.
With mvneta, the reality is that the 2.5G speed is implemented by
changing the clock configuration in the COMPHY block (serdes) - which
basically clocks everything 2.5x faster. I seem to remember mvpp2 is
the same deal.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
_______________________________________________
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next prev parent reply other threads:[~2022-07-22 13:52 UTC|newest]
Thread overview: 168+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-15 16:00 [PATCH net-next 0/6] net: dsa: always use phylink Russell King (Oracle)
2022-07-15 16:00 ` Russell King (Oracle)
2022-07-15 16:01 ` [PATCH net-next 1/6] net: phylink: split out and export interface to caps translation Russell King (Oracle)
2022-07-15 16:01 ` Russell King (Oracle)
2022-07-15 16:01 ` [PATCH net-next 2/6] software node: allow named software node to be created Russell King
2022-07-15 16:01 ` Russell King
2022-07-15 19:57 ` Andy Shevchenko
2022-07-15 19:57 ` Andy Shevchenko
2022-07-15 20:17 ` Vladimir Oltean
2022-07-15 20:17 ` Vladimir Oltean
2022-07-15 20:33 ` Andy Shevchenko
2022-07-15 20:33 ` Andy Shevchenko
2022-07-15 20:48 ` Vladimir Oltean
2022-07-15 20:48 ` Vladimir Oltean
2022-07-18 12:29 ` Andy Shevchenko
2022-07-18 12:29 ` Andy Shevchenko
2022-07-18 13:27 ` Russell King (Oracle)
2022-07-18 13:27 ` Russell King (Oracle)
2022-07-18 18:43 ` Andy Shevchenko
2022-07-18 18:43 ` Andy Shevchenko
2022-07-18 18:53 ` Andy Shevchenko
2022-07-18 18:53 ` Andy Shevchenko
2022-07-18 19:14 ` Russell King (Oracle)
2022-07-18 19:14 ` Russell King (Oracle)
2022-07-18 19:24 ` Andy Shevchenko
2022-07-18 19:24 ` Andy Shevchenko
2022-07-18 20:39 ` Marek Behún
2022-07-18 20:39 ` Marek Behún
2022-07-18 20:48 ` Andy Shevchenko
2022-07-18 20:48 ` Andy Shevchenko
2022-07-19 7:18 ` Marek Behún
2022-07-19 7:18 ` Marek Behún
2022-07-29 12:08 ` Andy Shevchenko
2022-07-29 12:08 ` Andy Shevchenko
2022-07-18 19:11 ` Russell King (Oracle)
2022-07-18 19:11 ` Russell King (Oracle)
2022-07-18 20:07 ` Andy Shevchenko
2022-07-18 20:07 ` Andy Shevchenko
2022-07-18 20:38 ` Russell King (Oracle)
2022-07-18 20:38 ` Russell King (Oracle)
2022-07-19 8:50 ` Sakari Ailus
2022-07-19 8:50 ` Sakari Ailus
2022-07-20 22:56 ` Vladimir Oltean
2022-07-20 22:56 ` Vladimir Oltean
2022-07-22 6:21 ` Sakari Ailus
2022-07-22 6:21 ` Sakari Ailus
2022-07-18 20:42 ` Andrew Lunn
2022-07-18 20:42 ` Andrew Lunn
2022-07-15 16:01 ` [PATCH net-next 3/6] net: dsa: add support for retrieving the interface mode Russell King (Oracle)
2022-07-15 16:01 ` Russell King (Oracle)
2022-07-15 17:24 ` Vladimir Oltean
2022-07-15 17:24 ` Vladimir Oltean
2022-07-15 21:31 ` Russell King (Oracle)
2022-07-15 21:31 ` Russell King (Oracle)
2022-07-15 22:23 ` Vladimir Oltean
2022-07-15 22:23 ` Vladimir Oltean
2022-07-15 22:57 ` Russell King (Oracle)
2022-07-15 22:57 ` Russell King (Oracle)
2022-07-16 10:57 ` Vladimir Oltean
2022-07-16 10:57 ` Vladimir Oltean
2022-07-16 11:13 ` Russell King (Oracle)
2022-07-16 11:13 ` Russell King (Oracle)
2022-07-16 12:36 ` Vladimir Oltean
2022-07-16 12:36 ` Vladimir Oltean
2022-07-18 8:48 ` Russell King (Oracle)
2022-07-18 8:48 ` Russell King (Oracle)
2022-07-20 22:44 ` Vladimir Oltean
2022-07-20 22:44 ` Vladimir Oltean
2022-07-21 13:46 ` Vladimir Oltean
2022-07-21 13:46 ` Vladimir Oltean
2022-07-21 14:46 ` Andrew Lunn
2022-07-21 14:46 ` Andrew Lunn
2022-07-21 14:54 ` Russell King (Oracle)
2022-07-21 14:54 ` Russell King (Oracle)
2022-07-21 15:15 ` Vladimir Oltean
2022-07-21 15:15 ` Vladimir Oltean
2022-07-21 17:21 ` Marek Behún
2022-07-21 17:21 ` Marek Behún
2022-07-21 18:15 ` Russell King (Oracle)
2022-07-21 18:15 ` Russell King (Oracle)
2022-07-21 18:22 ` Vladimir Oltean
2022-07-21 18:22 ` Vladimir Oltean
2022-07-21 21:14 ` Russell King (Oracle)
2022-07-21 21:14 ` Russell King (Oracle)
2022-07-21 21:36 ` Vladimir Oltean
2022-07-21 21:36 ` Vladimir Oltean
2022-07-22 8:28 ` Russell King (Oracle)
2022-07-22 8:28 ` Russell King (Oracle)
2022-07-22 10:52 ` Vladimir Oltean
2022-07-22 10:52 ` Vladimir Oltean
2022-07-22 11:44 ` Russell King (Oracle)
2022-07-22 11:44 ` Russell King (Oracle)
2022-07-22 12:14 ` Russell King (Oracle)
2022-07-22 12:14 ` Russell King (Oracle)
2022-07-22 12:46 ` Vladimir Oltean
2022-07-22 12:46 ` Vladimir Oltean
2022-07-22 13:16 ` Russell King (Oracle)
2022-07-22 13:16 ` Russell King (Oracle)
2022-07-22 16:56 ` Vladimir Oltean
2022-07-22 16:56 ` Vladimir Oltean
2022-07-22 21:20 ` Russell King (Oracle)
2022-07-22 21:20 ` Russell King (Oracle)
2022-07-22 21:53 ` Andrew Lunn
2022-07-22 21:53 ` Andrew Lunn
2022-07-22 22:35 ` Andrew Lunn
2022-07-22 22:35 ` Andrew Lunn
2022-07-22 22:39 ` Vladimir Oltean
2022-07-22 22:39 ` Vladimir Oltean
2022-07-23 7:12 ` Russell King (Oracle)
2022-07-23 7:12 ` Russell King (Oracle)
2022-07-23 13:44 ` Vladimir Oltean
2022-07-23 13:44 ` Vladimir Oltean
2022-07-25 10:11 ` Russell King (Oracle)
2022-07-25 10:11 ` Russell King (Oracle)
2022-07-23 17:26 ` Marek Behún
2022-07-23 17:26 ` Marek Behún
2022-07-24 17:39 ` Vladimir Oltean
2022-07-24 17:39 ` Vladimir Oltean
2022-07-22 13:20 ` Andrew Lunn
2022-07-22 13:20 ` Andrew Lunn
2022-07-22 12:59 ` Marek Behún
2022-07-22 12:59 ` Marek Behún
2022-07-22 13:23 ` Russell King (Oracle) [this message]
2022-07-22 13:23 ` Russell King (Oracle)
2022-07-22 14:19 ` Marek Behún
2022-07-22 14:19 ` Marek Behún
2022-07-15 16:01 ` [PATCH net-next 4/6] net: dsa: mv88e6xxx: report the default interface mode for the port Russell King (Oracle)
2022-07-15 16:01 ` Russell King (Oracle)
2022-07-15 16:01 ` [PATCH net-next 5/6] net: dsa: use swnode fixed-link if using default params Russell King (Oracle)
2022-07-15 16:01 ` Russell King (Oracle)
2022-07-15 20:11 ` Andy Shevchenko
2022-07-15 20:11 ` Andy Shevchenko
2022-07-15 21:36 ` Russell King (Oracle)
2022-07-15 21:36 ` Russell King (Oracle)
2022-07-18 18:59 ` Andy Shevchenko
2022-07-18 18:59 ` Andy Shevchenko
2022-07-18 19:13 ` Russell King (Oracle)
2022-07-18 19:13 ` Russell King (Oracle)
2022-07-18 20:08 ` Andy Shevchenko
2022-07-18 20:08 ` Andy Shevchenko
2022-07-15 16:01 ` [PATCH net-next 6/6] net: dsa: mv88e6xxx: remove handling for DSA and CPU ports Russell King (Oracle)
2022-07-15 16:01 ` Russell King (Oracle)
2022-07-15 17:17 ` [PATCH net-next 0/6] net: dsa: always use phylink Vladimir Oltean
2022-07-15 17:17 ` Vladimir Oltean
2022-07-15 20:59 ` Russell King (Oracle)
2022-07-15 20:59 ` Russell King (Oracle)
2022-07-15 23:03 ` Jakub Kicinski
2022-07-15 23:03 ` Jakub Kicinski
2022-07-16 11:15 ` Vladimir Oltean
2022-07-16 11:15 ` Vladimir Oltean
2022-07-16 11:43 ` Russell King (Oracle)
2022-07-16 11:43 ` Russell King (Oracle)
2022-07-16 13:13 ` Vladimir Oltean
2022-07-16 13:13 ` Vladimir Oltean
2022-07-18 8:53 ` Russell King (Oracle)
2022-07-18 8:53 ` Russell King (Oracle)
2022-07-18 12:45 ` Vladimir Oltean
2022-07-18 12:45 ` Vladimir Oltean
2022-07-18 13:02 ` Russell King (Oracle)
2022-07-18 13:02 ` Russell King (Oracle)
2022-07-18 14:25 ` Vladimir Oltean
2022-07-18 14:25 ` Vladimir Oltean
2022-07-16 23:44 ` Jakub Kicinski
2022-07-16 23:44 ` Jakub Kicinski
2022-07-27 9:00 ` Marek Behún
2022-07-27 9:00 ` Marek Behún
2022-07-27 13:38 ` Vladimir Oltean
2022-07-27 13:38 ` Vladimir Oltean
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