LRC_STATE_PN
#define LRC_STATE_OFFSET (LRC_STATE_PN * PAGE_SIZE)
const unsigned long start = LRC_STATE_PN * PAGE_SIZE;
gma_start = i915_ggtt_offset(ce->state) + LRC_STATE_PN*PAGE_SIZE;
(LRC_STATE_PN << I915_GTT_PAGE_SHIFT);
(LRC_STATE_PN << I915_GTT_PAGE_SHIFT);