linux-kernel - Re: [PATCH v3 0/4] PCI: get DMA configuration from parent device

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Date:	Thu, 8 Jan 2015 10:52:36 -0500
From:	Murali Karicheri <m-karicheri2@...com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Joerg Roedel <joro@...tes.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	"open list:INTEL IOMMU (VT-d)" <iommu@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	linux-arm <linux-arm-kernel@...ts.infradead.org>,
	Will Deacon <will.deacon@....com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v3 0/4] PCI: get DMA configuration from parent device

On 01/07/2015 06:08 PM, Bjorn Helgaas wrote:
> On Wed, Jan 7, 2015 at 5:05 PM, Murali Karicheri<m-karicheri2@...com>  wrote:
>> On 01/07/2015 01:49 PM, Murali Karicheri wrote:
>>>
>>> PCI devices on Keystone doesn't have correct dma_pfn_offset set. This
>>> patch
>>> add capability to set the dma configuration such as dma-mask,
>>> dma_pfn_offset,
>>> and dma ops etc using the information from DT. The prior RFCs and
>>> discussions
>>> are available at [1] and [2] below.
>>>
>>> [2] :
>>> https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg790244.html
>>> [1] : http://www.gossamer-threads.com/lists/linux/kernel/2024591
>>>
>>> Change history:
>>>          v3 - addressed comments to re-use of_dma_configure() for PCI
>>>             - To help re-use, change of_iommu_configure() function argument
>>>                  - Move of_dma_configure to of/device.c
>>>                  - Limit the of_iommu_configure to non pci devices
>>>          v2 - update size to coherent_dma_mask + 1 if dma-range info is
>>> missing
>>>             - also check the np for null.
>>>          v1 - updates based on the comments against initial RFC.
>>>             - Added a helper function to get the OF node of the parent
>>>             - Added an API in of_pci.c to update DMA configuration of the
>>> pci
>>>               device.
>>>
>>> Murali Karicheri (4):
>>>     of: iommu: add ptr to OF node arg to of_iommu_configure()
>>>     of: move of_dma_configure() to device,c to help re-use
>>>     of/pci: add of_pci_dma_configure() update dma configuration
>>>     PCI: update dma configuration from DT
>>>
>>>    drivers/iommu/of_iommu.c  |   10 ++++++--
>>>    drivers/of/device.c       |   58
>>> +++++++++++++++++++++++++++++++++++++++++++++
>>>    drivers/of/of_pci.c       |   39 ++++++++++++++++++++++++++++++
>>>    drivers/of/platform.c     |   58
>>> ++-------------------------------------------
>>>    drivers/pci/probe.c       |    2 ++
>>>    include/linux/of_device.h |    2 ++
>>>    include/linux/of_iommu.h  |    6 +++--
>>>    include/linux/of_pci.h    |   12 ++++++++++
>>>    8 files changed, 127 insertions(+), 60 deletions(-)
>>>
>> Bjorn,
>>
>> Could you review this series from the PCI subsystem point of view?
>
> Will do, it's in my patchwork queue.  I'm just returning after a
> couple weeks of vacation, during which I moved across the country, so
> it will take me a bit to catch up.
>
> Bjorn
Bjorn,

Thanks and Happy New year!

-- 
Murali Karicheri
Linux Kernel, Texas Instruments
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