From: Jakub Kicinski <kuba@kernel.org>
To: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc: Jiri Pirko <jiri@mellanox.com>, Andrew Lunn <andrew@lunn.ch>,
Robin Murphy <robin.murphy@arm.com>,
Calvin Johnson <calvin.johnson@nxp.com>,
stuyoder@gmail.com, nleeder@codeaurora.org,
Ioana Ciornei <ioana.ciornei@nxp.com>,
Cristi Sovaiala <cristian.sovaiala@nxp.com>,
Hanjun Guo <guohanjun@huawei.com>, Will Deacon <will@kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Marc Zyngier <maz@kernel.org>,
Pankaj Bansal <pankaj.bansal@nxp.com>,
Jon Nettleton <jon@solid-run.com>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Len Brown <lenb@kernel.org>, Jason Cooper <jason@lakedaemon.net>,
Andy Wang <Andy.Wang@arm.com>,
Makarand Pawagi <makarand.pawagi@nxp.com>,
Varun Sethi <V.Sethi@nxp.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Laurentiu Tudor <laurentiu.tudor@nxp.com>,
Paul Yang <Paul.Yang@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
"<netdev@vger.kernel.org>" <netdev@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: [EXT] Re: [PATCH] bus: fsl-mc: Add ACPI support for fsl-mc
Date: Sat, 1 Feb 2020 09:36:20 -0800 [thread overview]
Message-ID: <20200201093620.4b55d6fa@cakuba.hsd1.ca.comcast.net> (raw)
In-Reply-To: <20200201114919.GQ25745@shell.armlinux.org.uk>
On Sat, 1 Feb 2020 11:49:19 +0000, Russell King - ARM Linux admin wrote:
> What if someone decides to do:
>
> devlink port split device/1 count 2
>
> what do we end up with? Presumably two network devices running with
> two serdes lanes each (if supported by the hardware). At that point
> can they then do:
>
> devlink port split device/2 count 2
>
> and end up with one network device with two 10G serdes lanes, and two
> network devices each with one 10G serdes lane,
I think all your guesses are correct, it's a pretty straight forward
API, but it's also pretty thin, and some of the logic is in FW, so
there isn't much in a way of a standard on how things should behave :S
> or can port splitting only be used on the "master" device/port ?
I think both mlxsw and the NFP rejects re-split/further splitting.
Ports have to be unsplit first. So there is only one device for
splitting, and unsplitting can be done on any of the sub-devices.
> Unfortunately, I don't think I have any network devices that support
> this so I can't experiment to find out how this should work; yes, I
> have a Mellanox card, but it supports a single 10G SFP+, and therefore
> does not support port splitting.
I think you'd need a mlxsw or an nfp to play with this.
Maybe Jiri can clarify further :)
next prev parent reply other threads:[~2020-02-01 17:36 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 8:08 [PATCH] bus: fsl-mc: Add ACPI support for fsl-mc Makarand Pawagi
2020-01-28 10:58 ` Marc Zyngier
2020-01-28 11:09 ` Lorenzo Pieralisi
2020-01-31 10:35 ` [EXT] " Makarand Pawagi
2020-01-31 11:06 ` Lorenzo Pieralisi
2020-01-31 11:06 ` Marc Zyngier
2020-01-31 12:01 ` Ard Biesheuvel
2020-01-31 12:28 ` Jon Nettleton
2020-01-31 12:48 ` Robin Murphy
2020-01-31 13:11 ` Jon Nettleton
2020-01-31 13:29 ` Ard Biesheuvel
2020-01-31 13:39 ` Robin Murphy
2020-01-31 14:29 ` Andrew Lunn
2020-01-31 14:47 ` Will Deacon
2020-01-31 15:09 ` Andrew Lunn
2020-01-31 15:14 ` Jon Nettleton
2020-01-31 15:41 ` Andrew Lunn
2020-01-31 15:39 ` Russell King - ARM Linux admin
2020-01-31 15:15 ` Russell King - ARM Linux admin
2020-01-31 15:40 ` Jakub Kicinski
2020-02-01 11:49 ` Russell King - ARM Linux admin
2020-02-01 17:36 ` Jakub Kicinski [this message]
2020-02-14 15:05 ` Pankaj Bansal
2020-02-14 15:54 ` Marc Zyngier
2020-02-14 15:58 ` Pankaj Bansal
2020-02-14 16:19 ` Lorenzo Pieralisi
2020-02-14 16:35 ` Pankaj Bansal
2020-02-14 17:49 ` Lorenzo Pieralisi
2020-02-17 12:35 ` Pankaj Bansal
2020-02-17 15:25 ` Lorenzo Pieralisi
2020-02-17 15:35 ` Marc Zyngier
2020-02-17 16:26 ` Lorenzo Pieralisi
2020-02-18 8:02 ` Pankaj Bansal (OSS)
2020-02-14 16:29 ` Robin Murphy
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