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2018-03-21iommu/mediatek: Fix protect memory settingYong Wu1-0/+1
In MediaTek's IOMMU design, When a iommu translation fault occurs (HW can NOT translate the destination address to a valid physical address), the IOMMU HW output the dirty data into a special memory to avoid corrupting the main memory, this is called "protect memory". the register(0x114) for protect memory is a little different between mt8173 and mt2712. In the mt8173, bit[30:6] in the register represents [31:7] of the physical address. In the 4GB mode, the register bit[31] should be 1. While in the mt2712, the bits don't shift. bit[31:7] in the register represents [31:7] in the physical address, and bit[1:0] in the register represents bit[33:32] of the physical address if it has. Fixes: e6dec9230862 ("iommu/mediatek: Add mt2712 IOMMU support") Reported-by: Honghui Zhang <honghui.zhang@mediatek.com> Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-22iommu/mediatek: Merge 2 M4U HWs into one iommu domainYong Wu1-0/+2
In theory, If there are 2 M4U HWs, there should be 2 IOMMU domains. But one IOMMU domain(4GB iova range) is enough for us currently, It's unnecessary to maintain 2 pagetables. Besides, This patch can simplify our consumer code largely. They don't need map a iova range from one domain into another, They can share the iova address easily. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-22iommu/mediatek: Add mt2712 IOMMU supportYong Wu1-0/+7
The M4U IP blocks in mt2712 is MTK's generation2 M4U which use the ARM Short-descriptor like mt8173, and most of the HW registers are the same. The difference is that there are 2 M4U HWs in mt2712 while there's only one in mt8173. The purpose of 2 M4U HWs is for balance the bandwidth. Normally if there are 2 M4U HWs, there should be 2 iommu domains, each M4U has a iommu domain. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-07-20iommu/mtk: Avoid redundant TLB syncs locallyRobin Murphy1-0/+1
Under certain circumstances, the io-pgtable code may end up issuing two TLB sync operations without any intervening invalidations. This goes badly for the M4U hardware, since it means the second sync ends up polling for a non-existent operation to finish, and as a result times out and warns. The io_pgtable_tlb_* helpers implement a high-level optimisation to avoid issuing the second sync at all in such cases, but in order to work correctly that requires all pagetable operations to be serialised under a lock, thus is no longer applicable to all io-pgtable users. Since we're the only user actually relying on this flag for correctness, let's reimplement it locally to avoid the headache of trying to make the high-level version concurrency-safe for other users. CC: Yong Wu <yong.wu@mediatek.com> CC: Matthias Brugger <matthias.bgg@gmail.com> Tested-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-02-10iommu/mediatek: Make use of iommu_device_register interfaceJoerg Roedel1-0/+2
Register individual Mediatek IOMMUs to the iommu core and add sysfs entries. Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-11-10iommu/mediatek: Convert DT component matching to component_match_add_release()Russell King1-0/+5
Convert DT component matching to use component_match_add_release(). Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-11-10iommu/mediatek: Convert M4Uv1 to iommu_fwspecRobin Murphy1-6/+0
Our per-device data consists of the M4U instance and firmware-provided list of LARB IDs, which is a perfect fit for the generic iommu_fwspec machinery. Use that directly instead of the custom archdata code - while we can't rely on the of_xlate() mechanism to initialise things until the 32-bit ARM DMA code learns about groups and default domains, it still results in a reasonable simplification overall. CC: Honghui Zhang <honghui.zhang@mediatek.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Honghui Zhang <honghui.zhang@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-08-09iommu/mediatek: Mark static functions in headers inlineJoerg Roedel1-3/+3
This was an oversight while merging these functions. Fix it. Cc: Honghui Zhang <honghui.zhang@mediatek.com> Fixes: 9ca340c98c0d ('iommu/mediatek: move the common struct into header file') Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-06-21iommu/mediatek: move the common struct into header fileHonghui Zhang1-0/+77
Move the struct defines of mtk iommu into a new header files for common use. Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>