linux-kernel - Re: [PATCH v4 1/4] fpga: dfl: reorganize to subdir layout

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Date:   Thu, 17 Jun 2021 06:21:07 -0700
From:   Tom Rix <trix@...hat.com>
To:     "Wu, Hao" <hao.wu@...el.com>, Moritz Fischer <mdf@...nel.org>
Cc:     "corbet@....net" <corbet@....net>,
        "michal.simek@...inx.com" <michal.simek@...inx.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "krzysztof.kozlowski@...onical.com" 
        <krzysztof.kozlowski@...onical.com>,
        "nava.manne@...inx.com" <nava.manne@...inx.com>,
        "Xu, Yilun" <yilun.xu@...el.com>,
        "davidgow@...gle.com" <davidgow@...gle.com>,
        "fpacheco@...hat.com" <fpacheco@...hat.com>,
        "Gong, Richard" <richard.gong@...el.com>,
        "luca@...aceresoli.net" <luca@...aceresoli.net>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 1/4] fpga: dfl: reorganize to subdir layout


On 6/17/21 1:34 AM, Wu, Hao wrote:
>> On Wed, Jun 16, 2021 at 01:05:36AM +0000, Wu, Hao wrote:
>>>> On 6/15/21 1:08 AM, Wu, Hao wrote:
>>>>>> Subject: [PATCH v4 1/4] fpga: dfl: reorganize to subdir layout
>>>>>>
>>>>>> From: Tom Rix <trix@...hat.com>
>>>>>>
>>>>>> Follow drivers/net/ethernet/ which has control configs
>>>>>> NET_VENDOR_BLA that map to drivers/net/ethernet/bla
>>>>>> Since fpgas do not have many vendors, drop the 'VENDOR' and use
>>>>>> FPGA_BLA.
>>>>> Hi Tom,
>>>>>
>>>>> Thanks for this patch. : )
>>>>>
>>>>> DFL is not a vendor, but something can be shared/reused. It's possible that
>>>>> other vendors reuse the same concepts and the drivers of DFL. If vendor
>>>>> drivers need to be moved inside sub folders, then maybe it's better to
>>>>> leave DFL in the parent folder?
>>>> xrt is also not a vendor, more a subdevice framework like dfl.
>>>>
>>>> I am not sure what you mean by other dfl vendors can you give an example ?
>>> It's fine, but the description here is a little confusing on vendor/framework
>>> handling. No other vendor so far, but it's possible, DFL can be used in
>>> non-intel device, and related drivers can be reused as well. Then a fpga
>>> mgr driver depends on DFL, should be put inside dfl folder or new
>>> vendor's subfolder?
>>>
>>> Hao
>>>
>> I'm somewhat neutral on this. If someone non-intel starts using DFL we could
>> also
>> move the common parts back ...
> That's fine.
>
>> That being said, I'm not super convinced we have to move stuff in the
>> first place.
> I remember that the first submission of our code is having everything inside a sub
> folder, but was suggested that to have everything moved out, this is why we have
> dfl files here now. To be honest, I have the similar feeling as you, I didn't see any
> strong reason to make this something we must do, but both solutions should be
> fine. : )

xrt is bringing in the subdir xrt/

Even after the likely move of xrt subdevices to other subsystems, there 
will be about as many files in fpga/xrt/ as in fpga/

If both of you are fine with a mixed files and subdir organization, then 
I'll drop this patchset.

If you want only files, then xrt needs to refactor, so let them know.

Tom

> Thanks
> Hao
>
>> - Moritz