linux-kernel - Re: xilinx-pci driver and pci in general

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Date:	Mon, 18 Jan 2010 10:38:13 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	michal.simek@...alogix.com, linuxppc-dev@...abs.org,
	thunderbird2k@....net, John Williams <john.williams@...alogix.com>,
	Arnd Bergmann <arnd@...db.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: xilinx-pci driver and pci in general

On Wed, Jan 13, 2010 at 7:07 PM, Benjamin Herrenschmidt
<benh@...nel.crashing.org> wrote:
> On Wed, 2010-01-13 at 16:23 +0100, Michal Simek wrote:
>
>> The main problems are:
>> ppc use ppc_md struct which we don't have it on Microblaze.
>> xilinx-pci driver uses exclude_device function. This function is used in
>> indirect_pci.c too. There could be a way to move that function directly
>> to pci_controller structure which could be useful for other controllers
>> too. What do you think?
>>
>> Then there are some other ppc_md. calling like pcibios_after_init which
>> if I see correctly not used for ppc too.
>
> We may not be using after_init() anymore in which case you are welcome
> to send a patch to remove it :-)
>
> As for the others, well ... maybe you can do wrappers for these that
> call into ppc_md. on powerpc and into some kind of arch_pci_ops. that
> the platform provides on microblaze ?

I agree.  Replace the direct ppc_md. references with arch-provided wrappers.

>> Files contains CONFIG_PPC_OF and we would like to use only CONFIG_OF.
>> I remember any discuss around but not sure what was the conclusion on
>> powerpc.
>
> I think that should be allright, Grant, any objection there ?

None whatsoever.

>> Part of headers are the same that's why there will be a space to move
>> them to asm-generic.
>
> If you can convince other archs that it makes sense to do so ? :-)

Arnd can give you good advice here I think.

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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