linux-kernel - Re: [PATCH net-next v9 0/3] Add minimal XDP support to TI AM65 CPSW Ethernet driver

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Date: Thu, 18 Apr 2024 13:17:47 +0200
From: Julien Panis <jpanis@...libre.com>
To: Siddharth Vadapalli <s-vadapalli@...com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Russell King <linux@...linux.org.uk>, Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 John Fastabend <john.fastabend@...il.com>,
 Sumit Semwal <sumit.semwal@...aro.org>,
 Christian König <christian.koenig@....com>,
 Simon Horman <horms@...nel.org>, Andrew Lunn <andrew@...n.ch>,
 Ratheesh Kannoth <rkannoth@...vell.com>,
 Naveen Mamindlapalli <naveenm@...vell.com>,
 Jacob Keller <jacob.e.keller@...el.com>
Cc: danishanwar@...com, yuehaibing@...wei.com, rogerq@...nel.org,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
 linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH net-next v9 0/3] Add minimal XDP support to TI AM65 CPSW
 Ethernet driver

On 4/18/24 13:00, Siddharth Vadapalli wrote:
> On 12-04-2024 21:08, Julien Panis wrote:
>> This patch adds XDP support to TI AM65 CPSW Ethernet driver.
>>
>> The following features are implemented: NETDEV_XDP_ACT_BASIC,
>> NETDEV_XDP_ACT_REDIRECT, and NETDEV_XDP_ACT_NDO_XMIT.
>>
>> Zero-copy and non-linear XDP buffer supports are NOT implemented.
>>
>> Besides, the page pool memory model is used to get better performance.
>>
>> Signed-off-by: Julien Panis <jpanis@...libre.com>
> Hello Julien,
>
> This series crashes Linux on AM62ax SoC which also uses the
> AM65-CPSW-NUSS driver:
> https://gist.github.com/Siddharth-Vadapalli-at-TI/5ed0e436606001c247a7da664f75edee
>
> Regards,
> Siddharth.

Hello Siddharth.

Thanks for the log. I can read:
[    1.966094] Missing net_device from driver

Did you check that nodes exist in the device tree for the net devices ?

Julien