RING_IPEHR
ENGINE_READ(engine, RING_IPEHR));
i915_reg_t reg_ipehr = RING_IPEHR(0);
{ RING_IPEHR(0), 0, 0, "IPEHR" }, \
ee->ipehr = ENGINE_READ(engine, RING_IPEHR);
MMIO_RING_D(RING_IPEHR);
{ RING_IPEHR(0), REG_32BIT, 0, 0, 0, "IPEHR"}, \