From: Honghui Zhang <honghui.zhang@xxxxxxxxxxxx> Mediatek's m4u(Multimedia Memory Management Unit) and SMI(Smart Multimedia Interface)have two generations HW. They basically sharing the same hardware block diagram, but have some difference as below: Generation one m4u only supports one layer, flat pagetable addressing, and only supports 4K size page mapping. While generation two m4u supports 2 levels of pagetable which uses the ARM short-descriptor translation table format for address translation. They have slight different register base and register offset. They have very different HW ports defines. Generaion one SMI has additional "async" clock which transform the smi clock into emi clock domain, this clock should be prepared and enabled for SMI generation one HW. The register which control the iommu need to translation the address or not for a particular port is located at smi ao base(smi always on register base) for generation one SMI HW, but located at each larb's register base for generation two HW. This patch set add mt2701 iommu support, it's based on 4.6-rc1 and James Liao's "Add clock support for Mediatek MT2701 v8[1]" and "Mediatek MT2701 SCPSYS power domain support v7[2]" patch. v2: -Fix syntax errors in dt-bindings. -Use dma_alloc/free_coherent to allocate pagetable memory and reduce the streaming DMA stuff. -Make the mtk_iommu_ops.pgsize_bitmap as ~0UL << MT2701_IOMMU_PAGE_SHIFT. -Use macro instead of variable to indicate the pagetable size. -Change some macro name from MTK_XXX to MT2701_XXX. v1: http://lists.infradead.org/pipermail/linux-mediatek/2016-May/005301.html -initial version [1] http://lists.infradead.org/pipermail/linux-mediatek/2016-May/005439.html [2] http://lists.infradead.org/pipermail/linux-mediatek/2016-May/005429.html Honghui Zhang (5): dt-bindings: mediatek: add descriptions for mediatek mt2701 iommu and smi iommu/mediatek: move the common struct into header file memory/mediatek: add support for mt2701 iommu/mediatek: add support for mtk iommu generation one HW ARM: dts: mt2701: add iommu/smi dtsi node for mt2701 .../devicetree/bindings/iommu/mediatek,iommu.txt | 13 +- .../memory-controllers/mediatek,smi-common.txt | 21 +- .../memory-controllers/mediatek,smi-larb.txt | 4 +- arch/arm/boot/dts/mt2701.dtsi | 51 ++ drivers/iommu/Kconfig | 19 + drivers/iommu/Makefile | 1 + drivers/iommu/mtk_iommu.c | 62 +- drivers/iommu/mtk_iommu.h | 93 +++ drivers/iommu/mtk_iommu_v1.c | 742 +++++++++++++++++++++ drivers/memory/mtk-smi.c | 168 ++++- include/dt-bindings/memory/mt2701-larb-port.h | 85 +++ 11 files changed, 1171 insertions(+), 88 deletions(-) create mode 100644 drivers/iommu/mtk_iommu.h create mode 100644 drivers/iommu/mtk_iommu_v1.c create mode 100644 include/dt-bindings/memory/mt2701-larb-port.h -- 1.8.1.1.dirty -- 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
