linux-kernel - Re: [V4 PATCH 3/6] pci: Generic function for setting up PCI device DMA coherency

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Message-ID: <D17CC88E.1AFDA%suravee.suthikulpanit@amd.com>
Date:	Sat, 16 May 2015 15:14:36 +0000
From:	"Suthikulpanit, Suravee" <Suravee.Suthikulpanit@....com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Rafael Wysocki <rjw@...ysocki.net>, Len Brown <lenb@...nel.org>,
	"Catalin Marinas" <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	"Lendacky, Thomas" <Thomas.Lendacky@....com>,
	"herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
	David Miller <davem@...emloft.net>,
	"Arnd Bergmann" <arnd@...db.de>, Mark Salter <msalter@...hat.com>,
	Hanjun Guo <hanjun.guo@...aro.org>,
	Al Stone <al.stone@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	"Duran, Leo" <leo.duran@....com>,
	linux-arm <linux-arm-kernel@...ts.infradead.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>,
	netdev <netdev@...r.kernel.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Murali Karicheri <m-karicheri2@...com>
Subject: Re: [V4 PATCH 3/6] pci: Generic function for setting up PCI device
 DMA coherency

Hi Bjorn,

On 5/16/15, 07:41, "Bjorn Helgaas" <bhelgaas@...gle.com> wrote:

>On Fri, May 15, 2015 at 4:23 PM, Suravee Suthikulpanit
><Suravee.Suthikulpanit@....com> wrote:
>> This patch refactors of_pci_dma_configure() into a more generic
>> pci_dma_configure(), which can be reused by non-OF code.
>> Then, it adds support for setting up PCI device DMA coherency from
>> ACPI _CCA object that should normally be specified in the DSDT node
>> of its PCI host bridge..
>
>>From the changelog, it sounds like you might be able to split this
>into two patches:
>
>1) Refactor of_pci_dma_configure(), with no functional change
>2) Add support for using _CCA
>
>If that's possible, please do so to make this easier to review.
>
>Bjorn

Yes, I can separate the patch out. This would mainly affect ACPI+PCI
support for ARM64 (which is in progress).

Thanks,

Surafvee

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