Hi Yong, On Mon, Jan 11, 2021 at 07:18:41PM +0800, Yong Wu wrote: > This patch mainly adds support for mt8192 Multimedia IOMMU and SMI. > > mt8192 also is MTK IOMMU gen2 which uses ARM Short-Descriptor translation > table format. The M4U-SMI HW diagram is as below: > > EMI > | > M4U > | > ------------ > SMI Common > ------------ > | > +-------+------+------+----------------------+-------+ > | | | | ...... | | > | | | | | | > larb0 larb1 larb2 larb4 ...... larb19 larb20 > disp0 disp1 mdp vdec IPE IPE > > All the connections are HW fixed, SW can NOT adjust it. > > Comparing with the preview SoC, this patchset mainly adds two new functions: > a) add iova 34 bits support. > b) add multi domains support since several HW has the special iova > region requirement. > > change note: > v6:a) base on v5.11-rc1. and tlb v4: > > https://lore.kernel.org/linux-mediatek/20210107122909.16317-1-yong...@mediatek.com/T/#t > > b) Remove the "domain id" definition in the binding header file. > Get the domain from dev->dma_range_map. > After this, Change many codes flow. > c) the patchset adds a new common file(mtk_smi-larb-port.h). > This version changes that name into mtk-memory-port.h which reflect > its file path. This only changes the file name. no other change. > thus I keep all the Reviewed-by Tags. > (another reason is that we will add some iommu ports unrelated with > smi-larb) > d) Refactor the power-domain flow suggestted by Tomasz. > e) Some other small fix. use different oas for different soc; Change the > macro for 34bit iova tlb flush. >
Thanks for the fixes. I still think the concept of dma-ranges is not quire right for the problem we need to solve here, but it certainly works for the time being and it's possible to remove it in a follow up patch, so I'm fine with merging this as is. Reviewed-by: Tomasz Figa <tf...@chromium.org> I'll comment on my suggestion for a replacement for the dma-ranges that doesn't need hardcoding arbitrary address ranges in DT in a separate reply. Best regards, Tomasz _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
