netdev - Re: [PATCH net-next v2 2/2] net/mlx5: implement swp_l4_csum

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Message-ID: <p3pj3mu4mabgninwowqikegeotxgzhc4yptf7qrfhns37bnkoz@ugkbgvlkxqxb>
Date: Tue, 4 Nov 2025 15:39:54 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: Daniel Zahka <daniel.zahka@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
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	linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org
Subject: Re: [PATCH net-next v2 2/2] net/mlx5: implement swp_l4_csum_mode via
 devlink params

Tue, Nov 04, 2025 at 01:51:16PM +0100, daniel.zahka@...il.com wrote:
>
>
>On 11/4/25 6:38 AM, Daniel Zahka wrote:
>> 
>> 
>> On 11/4/25 5:14 AM, Jiri Pirko wrote:
>> > I did some research. 0/DEVICE_DEFAULT should not be ever reported back
>> > from FW. It's purpose is for user to reset to default FW configuration.
>> > What's the usecase for that? I think you could just avoid
>> > 0/DEVICE_DEFAULT entirely, for both get and set.
>> 
>> I find that 0/DEVICE_DEFAULT is reported back on my device. I have
>> observed this same behavior when using the mstconfig tool for setting the
>> parameter too.
>
>e.g.
>$ dmesg | grep -i mlx | grep -i firmware
>[   10.165767] mlx5_core 0000:01:00.0: firmware version: 28.46.1006
>
>$ ./mstconfig -d 01:00.0 -b ./mlxconfig_host.db query SWP_L4_CHECKSUM_MODE
>
>Device #1:
>----------
>
>Device type:        ConnectX7
>Name:               CX71143DMC-CDAE_FB_Ax
>Description:        ConnectX-7 Ethernet adapter card; 100 GbE OCP3.0;
>Single-port QSFP; Multi Host; 2 Host; PCIe 4.0 x16; Crypto and Secure Boot
>Device:             01:00.0
>
>Configurations:                                          Next Boot
>        SWP_L4_CHECKSUM_MODE DEVICE_DEFAULT(0)

This is next-boot value. You should query current (--enable_verbosity)
to show in param get.