FENCE_REG_GEN6_LO
fence_reg_lo = FENCE_REG_GEN6_LO(fence->id);
fence_reg_lo = FENCE_REG_GEN6_LO(reg->id);
((offset - i915_mmio_reg_offset(FENCE_REG_GEN6_LO(0))) >> 3)
(num * 8 + i915_mmio_reg_offset(FENCE_REG_GEN6_LO(0)))
MMIO_F(FENCE_REG_GEN6_LO(0), 0x80, 0, 0, 0, D_ALL, fence_mmio_read, fence_mmio_write);
FENCE_REG_GEN6_LO(i));
MMIO_F(FENCE_REG_GEN6_LO(0), 0x80);