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From: Shawn Guo <shawnguo@kernel.org>
To: Vladimir Oltean <vladimir.oltean@nxp.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org,
	Rob Herring <robh+dt@kernel.org>, Li Yang <leoyang.li@nxp.com>
Subject: Re: [PATCH devicetree] arm64: dts: ls1028a: mark internal links between Felix and ENETC as capable of flow control
Date: Tue, 5 Oct 2021 14:01:27 +0800	[thread overview]
Message-ID: <20211005060126.GR20743@dragon> (raw)
In-Reply-To: <20210929115226.1383925-1-vladimir.oltean@nxp.com>

On Wed, Sep 29, 2021 at 02:52:26PM +0300, Vladimir Oltean wrote:
> The internal Ethernet switch suffers from erratum A-050484 ("Ethernet
> flow control not functional on L2 switch NPI port when XFH is used").
> XFH stands for "Extraction Frame Header" - which basically means the
> default "ocelot" DSA tagging protocol.
> 
> However, the switch supports one other tagging protocol - "ocelot-8021q",
> and this is not subject to the erratum above. So describe the hardware
> ability to pass PAUSE frames in the device tree, and let the driver
> figure out whether it should use flow control on the CPU port or not,
> depending on whether the "ocelot" or "ocelot-8021q" tagging protocol is
> being used.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>

Applied, thanks!

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WARNING: multiple messages have this Message-ID (diff)
From: Shawn Guo <shawnguo@kernel.org>
To: Vladimir Oltean <vladimir.oltean@nxp.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org,
	Rob Herring <robh+dt@kernel.org>, Li Yang <leoyang.li@nxp.com>
Subject: Re: [PATCH devicetree] arm64: dts: ls1028a: mark internal links between Felix and ENETC as capable of flow control
Date: Tue, 5 Oct 2021 14:01:27 +0800	[thread overview]
Message-ID: <20211005060126.GR20743@dragon> (raw)
In-Reply-To: <20210929115226.1383925-1-vladimir.oltean@nxp.com>

On Wed, Sep 29, 2021 at 02:52:26PM +0300, Vladimir Oltean wrote:
> The internal Ethernet switch suffers from erratum A-050484 ("Ethernet
> flow control not functional on L2 switch NPI port when XFH is used").
> XFH stands for "Extraction Frame Header" - which basically means the
> default "ocelot" DSA tagging protocol.
> 
> However, the switch supports one other tagging protocol - "ocelot-8021q",
> and this is not subject to the erratum above. So describe the hardware
> ability to pass PAUSE frames in the device tree, and let the driver
> figure out whether it should use flow control on the CPU port or not,
> depending on whether the "ocelot" or "ocelot-8021q" tagging protocol is
> being used.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>

Applied, thanks!

  reply	other threads:[~2021-10-05  6:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-29 11:52 [PATCH devicetree] arm64: dts: ls1028a: mark internal links between Felix and ENETC as capable of flow control Vladimir Oltean
2021-09-29 11:52 ` Vladimir Oltean
2021-10-05  6:01 ` Shawn Guo [this message]
2021-10-05  6:01   ` Shawn Guo

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