mmVM_INVALIDATE_ENG0_REQ
SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG0_REQ);
hub->eng_distance = mmVM_INVALIDATE_ENG1_REQ - mmVM_INVALIDATE_ENG0_REQ;
SOC15_REG_OFFSET(MMHUB, 0, mmVM_INVALIDATE_ENG0_REQ);
hub->eng_distance = mmVM_INVALIDATE_ENG1_REQ - mmVM_INVALIDATE_ENG0_REQ;