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855d8f2379
Allow a potential IOMMU'ed GMMU mapping for all SYSMEM buffers inlcuding coherent sysmem. Typically this won't actually happen since IO coherent mappings will also often be accessed over NVLINK which is physically addressed. Also update the comments surrounding this code to take into account the new NVLINK nuances. Since NVLINK buffers are directly mapped even when the IOMMU is enabled this is very deserving of a comment explaining what's going on. Lastly add some simple functions for checking if an nvgpu_mem (or a particular aperture field) is a sysmem aperture. Currently this includes SYSMEM and SYSMEM_COH. JIRA EVLR-2333 Change-Id: I992d3c25d433778eaad9eef338aa5aa42afe597e Signed-off-by: Alex Waterman <alexw@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1665185 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>