netdev - Re: [[RFC PATCH v4 net-next] 0/2] net: dsa: hsr: Enable HSR HW offloading for KSZ9477

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Date: Mon, 11 Sep 2023 16:58:48 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Tristram.Ha@...rochip.com, Eric Dumazet <edumazet@...gle.com>, Andrew
 Lunn <andrew@...n.ch>, davem@...emloft.net, Woojung Huh
 <woojung.huh@...rochip.com>, Vladimir Oltean <olteanv@...il.com>, Oleksij
 Rempel <o.rempel@...gutronix.de>
Cc: Florian Fainelli <f.fainelli@...il.com>, Jakub Kicinski
 <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 UNGLinuxDriver@...rochip.com, Oleksij Rempel <linux@...pel-privat.de>,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [[RFC PATCH v4 net-next] 0/2] net: dsa: hsr: Enable HSR HW
 offloading for KSZ9477

Dear Community,

> This patch series provides support for HSR HW offloading in KSZ9477
> switch IC.
> 
> To test this feature:
> ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45
> version 1 ip link set dev lan1 up
> ip link set dev lan2 up
> ip a add 192.168.0.1/24 dev hsr0
> ip link set dev hsr0 up
> 
> To remove HSR network device:
> ip link del hsr0
> 
> It is also possible to create another HSR interface, but it will
> only support HSR is software - e.g.
> ip link add name hsr1 type hsr slave1 lan3 slave2 lan4 supervision 45
> version 1
> 
> Test HW:
> Two KSZ9477-EVB boards with HSR ports set to "Port1" and "Port2".
> 
> Performance SW used:
> nuttcp -S --nofork
> nuttcp -vv -T 60 -r 192.168.0.2
> nuttcp -vv -T 60 -t 192.168.0.2
> 
> Code: v6.5-rc7 Linux repository
> Tested HSR v0 and v1
> Results:
> With KSZ9477 offloading support added: RX: 100 Mbps TX: 98 Mbps
> With no offloading 		       RX: 63 Mbps  TX: 63 Mbps
> 
> 
> Lukasz Majewski (2):
>   net: dsa: Extend ksz9477 TAG setup to support HSR frames duplication
>   net: dsa: hsr: Enable in KSZ9477 switch HW HSR offloading
> 
>  drivers/net/dsa/microchip/ksz9477.c    | 81
> ++++++++++++++++++++++++++ drivers/net/dsa/microchip/ksz9477.h    |
> 2 + drivers/net/dsa/microchip/ksz_common.c | 76
> ++++++++++++++++++++++++ drivers/net/dsa/microchip/ksz_common.h |  3 +
>  net/dsa/tag_ksz.c                      |  8 +++
>  5 files changed, 170 insertions(+)
> 


Are there any comments regarding this new revision of the HSR support
for KSZ9477 switch?

Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@...x.de

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