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SubjectRe: [PATCH v6 0/7] PCI: get DMA configuration from parent device
On Thu, Feb 05, 2015 at 04:52:52PM -0500, Murali Karicheri wrote:
> This patch add an important capability to PCI driver on Keystone. I hope to
> have this merged to the upstream branch so that it is available for v3.20.
> Also would like thank everyone for the contribution.
>
> 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:
> v6 - Rebased to v3.19-v7
> - Addressed some minor comments about node name and DT size validation.
> - Pulled out 8/8 of v5 and plan to send a patch for enhancing
> of_dma_configure() to use size to calculate dma mask.
> - Added Acks from reviewers.
> v5 - moved the dma_mask update in device from ARM specific API to
> of_dma_configure to allow this across other architecture as well
> - improved sanity check for DT dma-range size in of_dma_configure()
> - moved API to get parent bridge device to PCI (host-bridge.c)
> v4 - moved size adjustments in of_iommu_configure() to a separate patch
> - consistent node name comment from Rob
> - patch 6 added for dma_mask adjustment and iommu mapping size
> limiting.
> 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.
>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Grant Likely <grant.likely@linaro.org>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Russell King <linux@arm.linux.org.uk>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
> Acked-by: Murali Karicheri <m-karicheri2@ti.com>
>
> Murali Karicheri (7):
> 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: fix size when dma-range is not used
> PCI: add helper functions pci_get[put]_host_bridge_device()
> of/pci: add of_pci_dma_configure() update dma configuration
> PCI: update dma configuration from DT
> arm: dma-mapping: limit iommu mapping size
>
> arch/arm/mm/dma-mapping.c | 7 +++++
> drivers/iommu/of_iommu.c | 10 ++++--
> drivers/of/device.c | 74 +++++++++++++++++++++++++++++++++++++++++++++
> drivers/of/of_pci.c | 19 ++++++++++++
> drivers/of/platform.c | 58 ++---------------------------------
> drivers/pci/host-bridge.c | 14 +++++++++
> drivers/pci/probe.c | 2 ++
> include/linux/of_device.h | 2 ++
> include/linux/of_iommu.h | 6 ++--
> include/linux/of_pci.h | 5 +++
> include/linux/pci.h | 3 ++
> 11 files changed, 140 insertions(+), 60 deletions(-)

Applied with additional acks/tested-by to pci/iommu for v4.1, thanks!

Bjorn


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