[PATCH v2 00/13] drm/tegra: Fix IOVA space on Tegra186 and later

[Dmitry Osipenko]

24.01.2019 21:02, Thierry Reding пишет:
> From: Thierry Reding <treding at nvidia.com>
> 
> Tegra186 and later are different from earlier generations in that they
> use an ARM SMMU rather than the Tegra SMMU. The ARM SMMU driver behaves
> slightly differently in that the geometry for IOMMU domains is set only
> after a device was attached to it. This is to make sure that the SMMU
> instance that the domain belongs to is known, because each instance can
> have a different input address space (i.e. geometry).
> 
> Work around this by moving all IOVA allocations to a point where the
> geometry of the domain is properly initialized.
> 
> This second version of the series addresses all review comments and adds
> a number of patches that will actually allow host1x to work with an SMMU
> enabled on Tegra186. The patches also add programming required to
> address the full 40 bits of address space.
> 
> This supersedes the following patch:
> 
>     https://patchwork.kernel.org/patch/10775579/

My understanding is that falcon won't boot because source DMA address of the firmware isn't set up correctly if the address is >32bit. Please correct me if I'm wrong, otherwise that need to be addressed in this series as well for completeness.