From: Heiko Stuebner <heiko@sntech•de>
To: Carlos de Paula <me@carlosedp•com>
Cc: jose.abreu@synopsys•com, Mark Rutland <mark.rutland@arm•com>,
Jonas Karlman <jonas@kwiboo•se>,
Katsuhiro Suzuki <katsuhiro@katsuster•net>,
Daniel Lezcano <daniel.lezcano@linaro•org>,
linux-kernel@vger•kernel.org, linux-rockchip@lists•infradead.org,
devicetree@vger•kernel.org, Rob Herring <robh+dt@kernel•org>,
linux-arm-kernel@lists•infradead.org,
Peter Geis <pgwipeout@gmail•com>,
Enric Balletbo i Serra <enric.balletbo@collabora•com>,
Johan Jonker <jbx6244@gmail•com>,
Philipp Tomsich <philipp.tomsich@theobroma-systems•com>,
Robin Murphy <robin.murphy@arm•com>,
papadakospan@gmail•com,
Christoph Muellner <christoph.muellner@theobroma-systems•com>
Subject: Re: [PATCH] arm64: dts: rockchip: Add txpbl node for RK3399/RK3328
Date: Sun, 01 Mar 2020 01:25:16 +0100 [thread overview]
Message-ID: <6132615.msM8OCcsVu@phil> (raw)
In-Reply-To: <20200218221040.10955-1-me@carlosedp.com>
Am Dienstag, 18. Februar 2020, 23:10:37 CET schrieb Carlos de Paula:
> Some rockchip SoCs like the RK3399 and RK3328 exhibit an issue
> where tx checksumming does not work with packets larger than 1498.
>
> The default Programmable Buffer Length for TX in these GMAC's is
> not suitable for MTUs higher than 1498. The workaround is to disable
> TX offloading with 'ethtool -K eth0 tx off rx off' causing performance
> impacts as it disables hardware checksumming.
>
> This patch sets snps,txpbl to 0x4 which is a safe number tested ok for
> the most popular MTU value of 1500.
>
> For reference, see https://lkml.org/lkml/2019/4/1/1382.
>
> Signed-off-by: Carlos de Paula <me@carlosedp•com>
applied for 5.7
Thanks
Heiko
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next prev parent reply other threads:[~2020-03-01 0:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-18 22:10 [PATCH] arm64: dts: rockchip: Add txpbl node for RK3399/RK3328 Carlos de Paula
2020-03-01 0:25 ` Heiko Stuebner [this message]
2020-03-01 2:06 ` Leonidas P.
2020-03-01 8:22 ` Daniel Lezcano
2020-03-01 9:02 ` Daniel Lezcano
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