drm/i915: don't open code the pdpe/pml4e clearing

Now that it's obvious what the helpers do, we can simplify the code
somewhat by using them when clearing the pdpe/pml4e with the relevant
scratch entry.

Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161213160512.7008-1-matthew.auld@intel.com

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index aa1820d..2d7ab1d 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -793,9 +793,6 @@ static bool gen8_ppgtt_clear_pdp(struct i915_address_space *vm,
        struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
        struct i915_page_directory *pd;
        uint64_t pdpe;
-       gen8_ppgtt_pdpe_t *pdpe_vaddr;
-       gen8_ppgtt_pdpe_t scratch_pdpe =
-               gen8_pdpe_encode(px_dma(vm->scratch_pd), I915_CACHE_LLC);
 
        gen8_for_each_pdpe(pd, pdp, start, length, pdpe) {
                if (WARN_ON(!pdp->page_directory[pdpe]))
@@ -803,11 +800,7 @@ static bool gen8_ppgtt_clear_pdp(struct i915_address_space *vm,
 
                if (gen8_ppgtt_clear_pd(vm, pd, start, length)) {
                        __clear_bit(pdpe, pdp->used_pdpes);
-                       if (USES_FULL_48BIT_PPGTT(dev_priv)) {
-                               pdpe_vaddr = kmap_px(pdp);
-                               pdpe_vaddr[pdpe] = scratch_pdpe;
-                               kunmap_px(ppgtt, pdpe_vaddr);
-                       }
+                       gen8_setup_pdpe(ppgtt, pdp, vm->scratch_pd, pdpe);
                        free_pd(vm->i915, pd);
                }
        }
@@ -832,9 +825,6 @@ static void gen8_ppgtt_clear_pml4(struct i915_address_space *vm,
        struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
        struct i915_page_directory_pointer *pdp;
        uint64_t pml4e;
-       gen8_ppgtt_pml4e_t *pml4e_vaddr;
-       gen8_ppgtt_pml4e_t scratch_pml4e =
-               gen8_pml4e_encode(px_dma(vm->scratch_pdp), I915_CACHE_LLC);
 
        GEM_BUG_ON(!USES_FULL_48BIT_PPGTT(vm->i915));
 
@@ -844,9 +834,7 @@ static void gen8_ppgtt_clear_pml4(struct i915_address_space *vm,
 
                if (gen8_ppgtt_clear_pdp(vm, pdp, start, length)) {
                        __clear_bit(pml4e, pml4->used_pml4es);
-                       pml4e_vaddr = kmap_px(pml4);
-                       pml4e_vaddr[pml4e] = scratch_pml4e;
-                       kunmap_px(ppgtt, pml4e_vaddr);
+                       gen8_setup_pml4e(ppgtt, pml4, vm->scratch_pdp, pml4e);
                        free_pdp(vm->i915, pdp);
                }
        }