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Date: Sat, 14 Mar 2026 20:52:11 +0100
From: Nicolai Buchwitz <nb@tipi-net.de>
To: Jakub Kicinski <kuba@kernel.org>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>, "David S . Miller"
 <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Paolo Abeni
 <pabeni@redhat.com>, Doug Berger <opendmb@gmail.com>, Florian Fainelli
 <florian.fainelli@broadcom.com>, Broadcom internal kernel review list
 <bcm-kernel-feedback-list@broadcom.com>, Vikas Gupta
 <vikas.gupta@broadcom.com>, Bhargava Marreddy
 <bhargava.marreddy@broadcom.com>, Rajashekar Hudumula
 <rajashekar.hudumula@broadcom.com>, Eric Biggers <ebiggers@kernel.org>,
 Heiner Kallweit <hkallweit1@gmail.com>, =?UTF-8?Q?Markus_Bl=C3=B6chl?=
 <mbloch@rooftopnetworks.de>, Arnd Bergmann <arnd@arndb.de>,
 netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next 0/6] net: bcmgenet: add XDP support
In-Reply-To: <20260314085232.089ea669@kernel.org>
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 <20260314085232.089ea669@kernel.org>
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On 14.3.2026 16:52, Jakub Kicinski wrote:
> On Fri, 13 Mar 2026 10:20:55 +0100 Nicolai Buchwitz wrote:
>> Add XDP support to the bcmgenet driver, covering XDP_PASS, XDP_DROP,
>> XDP_TX, XDP_REDIRECT, and ndo_xdp_xmit.
>> 
>> The first patch converts the RX path from the existing kmalloc-based
>> allocation to page_pool, which is a prerequisite for XDP. The 
>> remaining
>> patches incrementally add XDP functionality and per-action statistics.
>> 
>> Tested on Raspberry Pi CM4 (BCM2711, bcmgenet, 1Gbps link):
>> - XDP_PASS: 943 Mbit/s TX, 935 Mbit/s RX (no regression vs baseline)
>> - XDP_PASS latency: 0.164ms avg, 0% packet loss
>> - XDP_DROP: all inbound traffic blocked as expected
>> - XDP_TX: TX counter increments (packet reflection working)
>> - Link flap with XDP attached: no errors
>> - Program swap under iperf3 load: no errors
> 
> Have you had a chance to run the XDP tests from
> tools/testing/selftests/drivers/net/hw/
> ?

Not yet - thanks for the poibter. I will run it and include results in 
v2.

Nicolai