linux-kernel - Re: [PATCH V3 00/21] MMCONFIG refactoring and support for ARM64 PCI hostbridge init based on ACPI

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Date:	Thu, 14 Jan 2016 16:55:34 -0600
From:	Jeremy Linton <jeremy.linton@....com>
To:	Tomasz Nowicki <tn@...ihalf.com>, bhelgaas@...gle.com,
	arnd@...db.de, will.deacon@....com, catalin.marinas@....com,
	rjw@...ysocki.net, hanjun.guo@...aro.org,
	Lorenzo.Pieralisi@....com, okaya@...eaurora.org,
	jiang.liu@...ux.intel.com, Stefano.Stabellini@...citrix.com
Cc:	jchandra@...adcom.com, jcm@...hat.com,
	linaro-acpi@...ts.linaro.org, linux-pci@...r.kernel.org,
	Liviu.Dudau@....com, ddaney@...iumnetworks.com,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	robert.richter@...iumnetworks.com, Suravee.Suthikulpanit@....com,
	msalter@...hat.com, wangyijing@...wei.com, tglx@...utronix.de,
	mw@...ihalf.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V3 00/21] MMCONFIG refactoring and support for ARM64 PCI
 hostbridge init based on ACPI

On 01/13/2016 07:20 AM, Tomasz Nowicki wrote:
>  From the functionality point of view this series might be split into the
> following logic parts:
> 1. Make MMCONFIG code arch-agnostic which allows all architectures to collect
>     PCI config regions and used when necessary.
> 2. Move non-arch specific bits to the core code.
> 3. Use MMCONFIG code and implement generic ACPI based PCI host controller driver.
> 4. Enable above driver on ARM64
>
> Patches has been built on top of 4.4 and can be found here:
> git@...hub.com:semihalf-nowicki-tomasz/linux.git (pci-acpi-v3)

I boot tested this on JunoR2 with a recent build of Tianocore EDK2.

It works enough to boot the machine with PCIe attached sata, and 
ethernet, but is throwing messages like:

[    1.094643] pci 0000:00:00.0: BAR 13: no space for [io  size 0x2000]
[    1.101022] pci 0000:00:00.0: BAR 13: failed to assign [io  size 0x2000]

Its also throwing:

[    1.029958] pci 0000:00:00.0: of_irq_parse_pci() failed with rc=-22
[    1.052784] pci 0000:00:00.0: of_irq_parse_pci() failed with rc=-22


(see other response for the DwordIo resource i'm using).