On Monday 01 September 2014 12:47:08 Marek Szyprowski wrote: > > Who do you think needs to set this flag, and who needs to read it? > > In the proposed solution Exynos IOMMU driver creates a separate IO > address space > for every client device in a system and binds it to the default > dma-mapping space > for the given device. When drivers are doing its own management of IO > address > space, instead of relying on what is available by default with dma-mapping > interface, this will require releasing of the previously created default > structures and resources. So this flag is set by the driver doing its own > management of io address space. The flags is then checked by Exynos > IOMMU driver > to avoid creating the default dma-mapping address space for devices > which driver > does its own management. I don't completely understand it yet. I would assume the device to be added to the default domain at device creation time (of_platform_populate), way before we know which device driver is going to be used. How can this prevent the iommu driver from doing the association with the domain? Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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