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To be able to access the full physical memory range, gpu's dma_mask needs to be set to the max value of H/W compatible range. For example. In order to support from 2GB to 66 GB, GV11B's dma_mask needs to be atleast 37 bits. Set GV11B's dma_mask to 38 bit and T23X's dma_mask to 39 bit. These values are supported by H/W Bug 3656729 Signed-off-by: Debarshi Dutta <ddutta@nvidia.com> Change-Id: Icfff3c36a8c9cf074a254fa773c42e18020ae5de Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2723640 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com> Reviewed-by: Brad Griffis <bgriffis@nvidia.com> Reviewed-by: Alex Waterman <alexw@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: Brad Griffis <bgriffis@nvidia.com>