drm/i915: Remove the list of pinned inactive objects

Simplify object tracking by removing the inactive but pinned list. The
only place where this was used is for counting the available memory,
which is just as easy performed by checking all objects on the rare
occasions it is required (application startup). For ease of debugging,
we keep the reporting of pinned objects through the error-state and
debugfs.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 8 insertions, 30 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 2fc7c55e0e05..bf4683c9aed8 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -132,7 +132,7 @@ int i915_mutex_lock_interruptible(struct drm_device *dev)
 static inline bool
 i915_gem_object_is_inactive(struct drm_i915_gem_object *obj)
 {
-        return !obj->active && obj->pin_count == 0;
+        return !obj->active;
 }
 
 int
@@ -171,8 +171,9 @@ i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
 
         pinned = 0;
         mutex_lock(&dev->struct_mutex);
-        list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list)
-                pinned += obj->gtt_space->size;
+        list_for_each_entry(obj, &dev_priv->mm.gtt_list, gtt_list)
+                if (obj->pin_count)
+                        pinned += obj->gtt_space->size;
         mutex_unlock(&dev->struct_mutex);
 
         args->aper_size = dev_priv->mm.gtt_total;
@@ -1455,10 +1456,7 @@ i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj)
         struct drm_device *dev = obj->base.dev;
         struct drm_i915_private *dev_priv = dev->dev_private;
 
-        if (obj->pin_count != 0)
-                list_move_tail(&obj->mm_list, &dev_priv->mm.pinned_list);
-        else
-                list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
+        list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list);
 
         BUG_ON(!list_empty(&obj->gpu_write_list));
         BUG_ON(!obj->active);
@@ -3063,12 +3061,9 @@ i915_gem_object_pin(struct drm_i915_gem_object *obj,
                     uint32_t alignment,
                     bool map_and_fenceable)
 {
-        struct drm_device *dev = obj->base.dev;
-        struct drm_i915_private *dev_priv = dev->dev_private;
         int ret;
 
         BUG_ON(obj->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT);
-        WARN_ON(i915_verify_lists(dev));
 
         if (obj->gtt_space != NULL) {
                 if ((alignment && obj->gtt_offset & (alignment - 1)) ||
@@ -3096,34 +3091,20 @@ i915_gem_object_pin(struct drm_i915_gem_object *obj,
         if (!obj->has_global_gtt_mapping && map_and_fenceable)
                 i915_gem_gtt_bind_object(obj, obj->cache_level);
 
-        if (obj->pin_count++ == 0) {
-                if (!obj->active)
-                        list_move_tail(&obj->mm_list,
-                                       &dev_priv->mm.pinned_list);
-        }
+        obj->pin_count++;
         obj->pin_mappable |= map_and_fenceable;
 
-        WARN_ON(i915_verify_lists(dev));
         return 0;
 }
 
 void
 i915_gem_object_unpin(struct drm_i915_gem_object *obj)
 {
-        struct drm_device *dev = obj->base.dev;
-        drm_i915_private_t *dev_priv = dev->dev_private;
-
-        WARN_ON(i915_verify_lists(dev));
         BUG_ON(obj->pin_count == 0);
         BUG_ON(obj->gtt_space == NULL);
 
-        if (--obj->pin_count == 0) {
-                if (!obj->active)
-                        list_move_tail(&obj->mm_list,
-                                       &dev_priv->mm.inactive_list);
+        if (--obj->pin_count == 0)
                 obj->pin_mappable = false;
-        }
-        WARN_ON(i915_verify_lists(dev));
 }
 
 int
@@ -3426,12 +3407,10 @@ void i915_gem_free_object(struct drm_gem_object *gem_obj)
         struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);
         struct drm_device *dev = obj->base.dev;
 
-        while (obj->pin_count > 0)
-                i915_gem_object_unpin(obj);
-
         if (obj->phys_obj)
                 i915_gem_detach_phys_object(dev, obj);
 
+        obj->pin_count = 0;
         i915_gem_free_object_tail(obj);
 }
 
@@ -3699,7 +3678,6 @@ i915_gem_load(struct drm_device *dev)
         INIT_LIST_HEAD(&dev_priv->mm.active_list);
         INIT_LIST_HEAD(&dev_priv->mm.flushing_list);
         INIT_LIST_HEAD(&dev_priv->mm.inactive_list);
-        INIT_LIST_HEAD(&dev_priv->mm.pinned_list);
         INIT_LIST_HEAD(&dev_priv->mm.fence_list);
         INIT_LIST_HEAD(&dev_priv->mm.deferred_free_list);
         INIT_LIST_HEAD(&dev_priv->mm.gtt_list);