[Intel-gfx] [PATCH 02/11] drm/i915/gtt: Teach restore-gtt to walk the ggtt vma list not the object list

[Chris Wilson]

In preparation, for having non-vma objects stored inside the ggtt, to
handle restoration of the GGTT following resume, we need to walk over
the ggtt address space rebinding vma, as opposed to walking over bound
objects looking for ggtt entries.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Cc: Matthew Auld <matthew.william.auld at gmail.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 12b1386e47e9..4fb5c79ac24b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3568,7 +3568,7 @@ void i915_ggtt_disable_guc(struct drm_i915_private *i915)
 void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv)
 {
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;
-	struct drm_i915_gem_object *obj, *on;
+	struct i915_vma *vma, *vn;
 
 	i915_check_and_clear_faults(dev_priv);
 
@@ -3578,21 +3578,15 @@ void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv)
 	ggtt->vm.closed = true; /* skip rewriting PTE on VMA unbind */
 
 	/* clflush objects bound into the GGTT and rebind them. */
-	list_for_each_entry_safe(obj, on, &dev_priv->mm.bound_list, mm.link) {
-		bool ggtt_bound = false;
-		struct i915_vma *vma;
-
-		for_each_ggtt_vma(vma, obj) {
-			if (!i915_vma_unbind(vma))
-				continue;
+	GEM_BUG_ON(!list_empty(&ggtt->vm.active_list));
+	list_for_each_entry_safe(vma, vn, &ggtt->vm.inactive_list, vm_link) {
+		struct drm_i915_gem_object *obj = vma->obj;
 
-			WARN_ON(i915_vma_bind(vma, obj->cache_level,
-					      PIN_UPDATE));
-			ggtt_bound = true;
-		}
+		if (!i915_vma_unbind(vma))
+			continue;
 
-		if (ggtt_bound)
-			WARN_ON(i915_gem_object_set_to_gtt_domain(obj, false));
+		WARN_ON(i915_vma_bind(vma, obj->cache_level, PIN_UPDATE));
+		WARN_ON(i915_gem_object_set_to_gtt_domain(obj, false));
 	}
 
 	ggtt->vm.closed = false;
-- 
2.17.1