netdev - Re: [Intel-wired-lan] [PATCH iwl-next v3 10/13] ice: add method to disable FDIR SWAP option

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Message-ID: <6cc70dc8-62ef-4fdf-99e8-1091cc454352@intel.com>
Date: Thu, 18 Jul 2024 10:54:34 -0600
From: Ahmed Zaki <ahmed.zaki@...el.com>
To: Paul Menzel <pmenzel@...gen.mpg.de>
CC: Junfeng Guo <junfeng.guo@...el.com>, <netdev@...r.kernel.org>,
	<anthony.l.nguyen@...el.com>, Marcin Szycik <marcin.szycik@...ux.intel.com>,
	<intel-wired-lan@...ts.osuosl.org>, <horms@...nel.org>
Subject: Re: [Intel-wired-lan] [PATCH iwl-next v3 10/13] ice: add method to
 disable FDIR SWAP option



On 2024-07-17 3:55 a.m., Paul Menzel wrote:
> Dear Ahmed,
> 
> 
> Thank you for your reply.
> 
> 
> Am 15.07.24 um 16:23 schrieb Ahmed Zaki:
> 
>> On 2024-07-10 10:59 p.m., Paul Menzel wrote:
> 
>>> Am 10.07.24 um 22:40 schrieb Ahmed Zaki:
>>>> From: Junfeng Guo <junfeng.guo@...el.com>
>>>>
>>>> The SWAP Flag in the FDIR Programming Descriptor doesn't work properly,
>>>> it is always set and cannot be unset (hardware bug).
>>>
>>> Please document the datasheet/errata.
>>
>> Unfortunately, I don't think this is in any docs or errata.
> 
> Oh. How did you find out?
> 

I believe that was discovered when changing the SWAP flag in the 
descriptor did not have any effect at all.

>>>> Thus, add a method to effectively disable the FDIR SWAP option by
>>>> setting the FDSWAP instead of FDINSET registers.
>>>

Ahmed