linux-kernel - Re: [PATCH RFC 2/2] pci: create device tree node for selected devices

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Message-ID: <63c31198-ac4d-f3c7-9259-ea7dc6373b23@gmail.com>
Date:   Tue, 13 Sep 2022 02:03:06 -0500
From:   Frank Rowand <frowand.list@...il.com>
To:     Rob Herring <robh@...nel.org>, Lizhi Hou <lizhi.hou@....com>
Cc:     linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, helgaas@...nel.org,
        clement.leger@...tlin.com, max.zhen@....com, sonal.santan@....com,
        larry.liu@....com, brian.xu@....com, stefano.stabellini@...inx.com,
        trix@...hat.com
Subject: Re: [PATCH RFC 2/2] pci: create device tree node for selected devices

On 9/12/22 01:33, Frank Rowand wrote:
> On 9/2/22 13:54, Rob Herring wrote:
>> On Mon, Aug 29, 2022 at 02:43:37PM -0700, Lizhi Hou wrote:
>>> The PCI endpoint device such as Xilinx Alveo PCI card maps the register
>>> spaces from multiple hardware peripherals to its PCI BAR. Normally,
>>> the PCI core discovers devices and BARs using the PCI enumeration process.
>>> And the process does not provide a way to discover the hardware peripherals
>>> been mapped to PCI BARs.
> 
> < snip >
> 
>>
>> The above bits aren't really particular to PCI, so they probably 
>> belong in the DT core code. Frank will probably have thoughts on what 
>> this should look like.
> 
> < snip >
> 
> I will try to look through this patch series later today (Monday 9/12
> USA time - I will not be in Dublin for the conferences this week.)
> 
> -Frank

I have collected nearly 500 emails on the history behind this patch and
also another set of patch series that has been trying to achieve some
somewhat similar functionality.  Expect me to take a while to wade through
all of this.

-Frank