drm/i915: Count how many VMA are bound for an object

Since we may have VMA allocated for an object, but we interrupted their
binding, there is a disparity between have elements on the obj->vma_list
and being bound. i915_gem_obj_bound_any() does this check, but this is
not rigorously observed - add an explicit count to make it easier.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-7-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9bd5eb3..44cf4d0 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -174,6 +174,9 @@
 	if (obj->fence_reg != I915_FENCE_REG_NONE)
 		seq_printf(m, " (fence: %d)", obj->fence_reg);
 	list_for_each_entry(vma, &obj->vma_list, obj_link) {
+		if (!drm_mm_node_allocated(&vma->node))
+			continue;
+
 		seq_printf(m, " (%sgtt offset: %08llx, size: %08llx",
 			   vma->is_ggtt ? "g" : "pp",
 			   vma->node.start, vma->node.size);
@@ -335,11 +338,11 @@
 	struct drm_i915_gem_object *obj = ptr;
 	struct file_stats *stats = data;
 	struct i915_vma *vma;
-	int bound = 0;
 
 	stats->count++;
 	stats->total += obj->base.size;
-
+	if (!obj->bind_count)
+		stats->unbound += obj->base.size;
 	if (obj->base.name || obj->base.dma_buf)
 		stats->shared += obj->base.size;
 
@@ -347,8 +350,6 @@
 		if (!drm_mm_node_allocated(&vma->node))
 			continue;
 
-		bound++;
-
 		if (vma->is_ggtt) {
 			stats->global += vma->node.size;
 		} else {
@@ -364,9 +365,6 @@
 			stats->inactive += vma->node.size;
 	}
 
-	if (!bound)
-		stats->unbound += obj->base.size;
-
 	return 0;
 }