drm/i915/gtt: Mark TLBS dirty for gen8+

When we touch gen8+ page maps, mark them dirty like we
do with previous gens.

v2: Update comment (Joonas)

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.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 2279e03..bc41063 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -831,6 +831,16 @@ err_out:
        return -ENOMEM;
 }
 
+/* PDE TLBs are a pain to invalidate on GEN8+. When we modify
+ * the page table structures, we mark them dirty so that
+ * context switching/execlist queuing code takes extra steps
+ * to ensure that tlbs are flushed.
+ */
+static void mark_tlbs_dirty(struct i915_hw_ppgtt *ppgtt)
+{
+       ppgtt->pd_dirty_rings = INTEL_INFO(ppgtt->base.dev)->ring_mask;
+}
+
 static int gen8_alloc_va_range(struct i915_address_space *vm,
                               uint64_t start,
                               uint64_t length)
@@ -916,6 +926,7 @@ static int gen8_alloc_va_range(struct i915_address_space *vm,
        }
 
        free_gen8_temp_bitmaps(new_page_dirs, new_page_tables);
+       mark_tlbs_dirty(ppgtt);
        return 0;
 
 err_out:
@@ -928,6 +939,7 @@ err_out:
                unmap_and_free_pd(ppgtt->pdp.page_directory[pdpe], vm->dev);
 
        free_gen8_temp_bitmaps(new_page_dirs, new_page_tables);
+       mark_tlbs_dirty(ppgtt);
        return ret;
 }
 
@@ -1272,16 +1284,6 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
                kunmap_atomic(pt_vaddr);
 }
 
-/* PDE TLBs are a pain invalidate pre GEN8. It requires a context reload. If we
- * are switching between contexts with the same LRCA, we also must do a force
- * restore.
- */
-static void mark_tlbs_dirty(struct i915_hw_ppgtt *ppgtt)
-{
-       /* If current vm != vm, */
-       ppgtt->pd_dirty_rings = INTEL_INFO(ppgtt->base.dev)->ring_mask;
-}
-
 static void gen6_initialize_pt(struct i915_address_space *vm,
                struct i915_page_table *pt)
 {