RING_PP_DIR_BASE
ENGINE_READ(engine, RING_PP_DIR_BASE));
ENGINE_WRITE_FW(engine, RING_PP_DIR_BASE, pp_dir(vm));
*cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine->mmio_base));
*cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine->mmio_base));
ENGINE_READ(engine, RING_PP_DIR_BASE);