drm/i915: Remove unnecessary gen8_clamp_pd

gen8_clamp_pd clamps to the next page directory boundary, but the macro
gen8_for_each_pde already has a check to stop at the page directory
boundary.

Furthermore, i915_pte_count also restricts to the next page table
boundary.

v2: Rebase after Mika's ppgtt cleanup / scratch merge patch series.

Suggested-by: Akash Goel <akash.goel@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: "Akash Goel" <akash.goel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 96054a5..566466f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -955,7 +955,7 @@ static int gen8_alloc_va_range(struct i915_address_space *vm,
        gen8_for_each_pdpe(pd, &ppgtt->pdp, start, length, temp, pdpe) {
                gen8_pde_t *const page_directory = kmap_px(pd);
                struct i915_page_table *pt;
-               uint64_t pd_len = gen8_clamp_pd(start, length);
+               uint64_t pd_len = length;
                uint64_t pd_start = start;
                uint32_t pde;
 

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index e1cfa29..d5bf953 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -444,17 +444,6 @@ static inline uint32_t gen6_pde_index(uint32_t addr)
             temp = min(temp, length),                                  \
             start += temp, length -= temp)
 
-/* Clamp length to the next page_directory boundary */
-static inline uint64_t gen8_clamp_pd(uint64_t start, uint64_t length)
-{
-       uint64_t next_pd = ALIGN(start + 1, 1 << GEN8_PDPE_SHIFT);
-
-       if (next_pd > (start + length))
-               return length;
-
-       return next_pd - start;
-}
-
 static inline uint32_t gen8_pte_index(uint64_t address)
 {
        return i915_pte_index(address, GEN8_PDE_SHIFT);