drm/i915/stolen: actually mark as contiguous

Stolen memory is always allocated as physically contiguous pages, so
mark the object flags as such. It looks like the flags were previously
just ignored so this had no effect. In the future we might to add the
proper plumbing for passing the flags all over the way down from the
caller, but for now we don't have a use for that.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210421104658.304142-4-matthew.auld@intel.com

drivers/gpu/drm/i915/gem/i915_gem_stolen.c

@@ -637,10 +637,17 @@ static int __i915_gem_object_create_stolen(struct intel_memory_region *mem,
 {
 	static struct lock_class_key lock_class;
 	unsigned int cache_level;
+	unsigned int flags;
 	int err;
 
+	/*
+	 * Stolen objects are always physically contiguous since we just
+	 * allocate one big block underneath using the drm_mm range allocator.
+	 */
+	flags = I915_BO_ALLOC_CONTIGUOUS;
+
 	drm_gem_private_object_init(&mem->i915->drm, &obj->base, stolen->size);
-	i915_gem_object_init(obj, &i915_gem_object_stolen_ops, &lock_class, 0);
+	i915_gem_object_init(obj, &i915_gem_object_stolen_ops, &lock_class, flags);
 
 	obj->stolen = stolen;
 	obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
@@ -699,8 +706,7 @@ struct drm_i915_gem_object *
 i915_gem_object_create_stolen(struct drm_i915_private *i915,
 			      resource_size_t size)
 {
-	return i915_gem_object_create_region(i915->mm.stolen_region,
-					     size, I915_BO_ALLOC_CONTIGUOUS);
+	return i915_gem_object_create_region(i915->mm.stolen_region, size, 0);
 }
 
 static int init_stolen_smem(struct intel_memory_region *mem)