[Intel-gfx] [PATCH v3] drm/i915: Report correct GGTT space usage

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Currently only normal views were accounted which under-accounts
the usage as reported in debugfs and by the GET_APERTURE ioctl.

Introduce new helper, i915_gem_obj_total_ggtt_size, and use it
from call sites which want to know how much GGTT space are
objects using.

v2: Single loop in i915_gem_get_aperture_ioctl. (Chris Wilson)

v3: Walk GGTT active/inactive lists in i915_gem_get_aperture_ioctl
    for better efficiency. (Chris Wilson, Daniel Vetter)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
---
Sorry guys for a period I was convinced "mm.bound_list" is actually
"vm.bound_list". :)
---
 drivers/gpu/drm/i915/i915_debugfs.c |  8 ++++----
 drivers/gpu/drm/i915/i915_drv.h     |  3 +++
 drivers/gpu/drm/i915/i915_gem.c     | 26 ++++++++++++++++++++++----
 3 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 31d87685f3b9..3bb6c99d9869 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -269,7 +269,7 @@ static int i915_gem_stolen_list_info(struct seq_file *m, void *data)
 		list_add(&obj->obj_exec_link, &stolen);
 
 		total_obj_size += obj->base.size;
-		total_gtt_size += i915_gem_obj_ggtt_size(obj);
+		total_gtt_size += i915_gem_obj_total_ggtt_size(obj);
 		count++;
 	}
 	list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) {
@@ -299,7 +299,7 @@ static int i915_gem_stolen_list_info(struct seq_file *m, void *data)
 
 #define count_objects(list, member) do { \
 	list_for_each_entry(obj, list, member) { \
-		size += i915_gem_obj_ggtt_size(obj); \
+		size += i915_gem_obj_total_ggtt_size(obj); \
 		++count; \
 		if (obj->map_and_fenceable) { \
 			mappable_size += i915_gem_obj_ggtt_size(obj); \
@@ -405,7 +405,7 @@ static void print_batch_pool_stats(struct seq_file *m,
 
 #define count_vmas(list, member) do { \
 	list_for_each_entry(vma, list, member) { \
-		size += i915_gem_obj_ggtt_size(vma->obj); \
+		size += i915_gem_obj_total_ggtt_size(vma->obj); \
 		++count; \
 		if (vma->obj->map_and_fenceable) { \
 			mappable_size += i915_gem_obj_ggtt_size(vma->obj); \
@@ -535,7 +535,7 @@ static int i915_gem_gtt_info(struct seq_file *m, void *data)
 		describe_obj(m, obj);
 		seq_putc(m, '\n');
 		total_obj_size += obj->base.size;
-		total_gtt_size += i915_gem_obj_ggtt_size(obj);
+		total_gtt_size += i915_gem_obj_total_ggtt_size(obj);
 		count++;
 	}
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ea9caf22283f..690b541ed3b8 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3010,6 +3010,9 @@ i915_gem_obj_ggtt_size(struct drm_i915_gem_object *obj)
 	return i915_gem_obj_size(obj, i915_obj_to_ggtt(obj));
 }
 
+unsigned long
+i915_gem_obj_total_ggtt_size(struct drm_i915_gem_object *obj);
+
 static inline int __must_check
 i915_gem_obj_ggtt_pin(struct drm_i915_gem_object *obj,
 		      uint32_t alignment,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a2a4a271555c..76c72996be66 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -149,14 +149,18 @@ i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_i915_gem_get_aperture *args = data;
-	struct drm_i915_gem_object *obj;
+	struct i915_gtt *ggtt = &dev_priv->gtt;
+	struct i915_vma *vma;
 	size_t pinned;
 
 	pinned = 0;
 	mutex_lock(&dev->struct_mutex);
-	list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
-		if (i915_gem_obj_is_pinned(obj))
-			pinned += i915_gem_obj_ggtt_size(obj);
+	list_for_each_entry(vma, &ggtt->base.active_list, mm_list)
+		if (vma->pin_count)
+			pinned += vma->node.size;
+	list_for_each_entry(vma, &ggtt->base.inactive_list, mm_list)
+		if (vma->pin_count)
+			pinned += vma->node.size;
 	mutex_unlock(&dev->struct_mutex);
 
 	args->aper_size = dev_priv->gtt.base.total;
@@ -5469,3 +5473,17 @@ bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj)
 	return false;
 }
 
+unsigned long
+i915_gem_obj_total_ggtt_size(struct drm_i915_gem_object *obj)
+{
+	unsigned long size = 0;
+	struct i915_vma *vma;
+
+	list_for_each_entry(vma, &obj->vma_list, vma_link) {
+		if (i915_is_ggtt(vma->vm) &&
+		    drm_mm_node_allocated(&vma->node))
+			size += vma->node.size;
+	}
+
+	return size;
+}
-- 
2.4.2