AMDGPU_RLCG_VFI_STAT__BUSY
writel(AMDGPU_RLCG_VFI_STAT__BUSY, vfi_stat);
if (stat != AMDGPU_RLCG_VFI_STAT__BUSY)
case AMDGPU_RLCG_VFI_STAT__BUSY: