I965_FENCE_PAGE
GEM_BUG_ON(!IS_ALIGNED(vma->node.start, I965_FENCE_PAGE));
GEM_BUG_ON(!IS_ALIGNED(vma->fence_size, I965_FENCE_PAGE));
val = (vma->node.start + vma->fence_size - I965_FENCE_PAGE) << 32;
return I965_FENCE_PAGE;
GEM_BUG_ON(!IS_ALIGNED(stride, I965_FENCE_PAGE));