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Date: Mon, 8 Apr 2013 23:53:41 +0200
From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Grant Likely <grant.likely@secretlab.ca>,
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Subject: Re: [PATCHv7 08/17] pci: PCIe driver for Marvell Armada 370/XP
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Dear Arnd Bergmann,

On Mon, 8 Apr 2013 23:34:12 +0200, Arnd Bergmann wrote:

> > No, I'm assuming PCIBIOS_MIN_IO is always 0. So presumarly, this should
> > be something like:
> > 
> >         pcie->realio.end = min(PCIBIOS_MIN_IO +
> >                                 resource_size(&pcie->io),
> >                                 IO_SPACE_LIMIT);
> > 
> 
> Normally PCIBIOS_MIN_IO is 0x1000, since the first 4096 ports are reserved
> for ISA and PCMCIA compatible drivers and should not be assigned to
> PCI devices. So the first port should get ports 0x1000 to 0xffff, later
> ones can used the entire 65536 ports e.g. 0x10000 to 0x1ffff.

Then I guess it should work with the code I'm proposing here, no?

Note: this pcie->realio region is global: it will be shared by all PCIe
interfaces.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com