pte_len            86 drivers/gpu/drm/i915/i915_gem_gtt.h #define I915_PTES(pte_len)		((unsigned int)(PAGE_SIZE / (pte_len)))
pte_len            87 drivers/gpu/drm/i915/i915_gem_gtt.h #define I915_PTE_MASK(pte_len)		(I915_PTES(pte_len) - 1)