Hi all, Here is version three of the RFC I've previously posted here:
RFCv1: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-August/283023.html RFCv2: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/283752.html Changes since RFCv2 include: - Put the iommu_ops in iommu_data so of_iommu_configure can avoid using the bus_type - Initialise the offset and DMA masks on the dev in of_dma_configure instead of in the arch callback (as this would cause a regression on some architectures) - Added deconfigure/teardown code based on ref counting the iommu_dma_mapping - A bunch of small fixes (_OF_DECLARE, some code shuffling, fix multiple IOMMU parsing) All feedback welcome. Hopefully this is now at a point where people can start looking to port dma-mapping and/or IOMMU drivers to it. Cheers, Will --->8 Will Deacon (7): iommu: provide early initialisation hook for IOMMU drivers dma-mapping: replace set_arch_dma_coherent_ops with arch_setup_dma_ops iommu: add new iommu_ops callback for adding an OF device iommu: provide helper function to configure an IOMMU for an of master dma-mapping: detect and configure IOMMU in of_dma_configure arm: call iommu_init before of_platform_populate arm: dma-mapping: plumb our iommu mapping ops into arch_setup_dma_ops arch/arm/include/asm/dma-mapping.h | 9 ++-- arch/arm/kernel/setup.c | 2 + arch/arm/mm/dma-mapping.c | 68 ++++++++++++++++++++++++++---- drivers/iommu/Kconfig | 2 +- drivers/iommu/of_iommu.c | 84 ++++++++++++++++++++++++++++++++++++++ drivers/of/platform.c | 53 +++++++++++++----------- include/asm-generic/vmlinux.lds.h | 2 + include/linux/dma-mapping.h | 21 +++++++--- include/linux/iommu.h | 15 +++++++ include/linux/of_iommu.h | 35 ++++++++++++++++ 10 files changed, 247 insertions(+), 44 deletions(-) -- 2.1.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
