KGRAPHICS_SCRUBBER_HANDLE_VAS
ret = r535_mmu_vaspace_new(gr->scrubber.vmm, KGRAPHICS_SCRUBBER_HANDLE_VAS, false);
#define KGRAPHICS_SCRUBBER_HANDLE_CHANNEL (KGRAPHICS_SCRUBBER_HANDLE_VAS + 3)
#define KGRAPHICS_SCRUBBER_HANDLE_3DOBJ (KGRAPHICS_SCRUBBER_HANDLE_VAS + 4)