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@xxxxxxxxxxxxxxx/msg790244.html [1] : http://www.gossamer-threads.com/lists/linux/kernel/2024591 Change history: 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@xxxxxxxxxx> Cc: Grant Likely <grant.likely@xxxxxxxxxx> Cc: Rob Herring <robh+dt@xxxxxxxxxx> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Cc: Will Deacon <will.deacon@xxxxxxx> Cc: Russell King <linux@xxxxxxxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> Murali Karicheri (6): 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 of/pci: add of_pci_dma_configure() update dma configuration PCI: update dma configuration from DT arm: dma-mapping: updates to limit dma_mask and iommu mapping size arch/arm/mm/dma-mapping.c | 10 +++++++ drivers/iommu/of_iommu.c | 10 +++++-- drivers/of/device.c | 71 +++++++++++++++++++++++++++++++++++++++++++++ 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 ++++++++ 9 files changed, 150 insertions(+), 60 deletions(-) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
