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

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Message-ID: <56982664.5040009@arm.com>
Date:	Thu, 14 Jan 2016 16:51:16 -0600
From:	Jeremy Linton <jeremy.linton@....com>
To:	Mark Salter <msalter@...hat.com>, 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, 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, jcm@...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 01/14/2016 09:29 AM, Mark Salter wrote:
> IO resources on Mustang get disabled unless I do:
>
> @@ -126,9 +126,10 @@ static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
>          if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
>                  res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
>
> +#if 0
>          if (res->end >= 0x10003)
>                  res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
> -
> +#endif
>
> res->end is way beyond 0x10003 on Mustang:
>
>    pci_bus 0000:00: root bus resource [io  0x0000-0xffff window] (bus address [0x10000000-0x1000ffff])

Juno is throwing "No Space" errors too with the following acpi definition.

DWordIo ( // IO window
	ResourceProducer,
	MinFixed,
	MaxFixed,
	PosDecode,
	EntireRange,
	0x00000000,// Granularity
	0x00000000,// Min Base Address
	0x007fffff,// Max Base Address
	0x5f800000, // Translate
	0x00800000, // Length
	,
	,
	,
	TypeTranslation
)

Although, my reading of the ACPI dword section is suspect...