drm/i915: List objects allocated from stolen memory in debugfs

I was curious as to what objects were currently allocated from stolen
memory, and so exported it from debugfs.

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

1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index a1f4c91fb112..1a87cc9fd899 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -30,6 +30,7 @@
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 #include <linux/export.h>
+#include <linux/list_sort.h>
 #include <drm/drmP.h>
 #include "intel_drv.h"
 #include "intel_ringbuffer.h"
@@ -188,6 +189,67 @@ static int i915_gem_object_list_info(struct seq_file *m, void *data)
         return 0;
 }
 
+static int obj_rank_by_stolen(void *priv,
+                              struct list_head *A, struct list_head *B)
+{
+        struct drm_i915_gem_object *a =
+                container_of(A, struct drm_i915_gem_object, exec_list);
+        struct drm_i915_gem_object *b =
+                container_of(B, struct drm_i915_gem_object, exec_list);
+
+        return a->stolen->start - b->stolen->start;
+}
+
+static int i915_gem_stolen_list_info(struct seq_file *m, void *data)
+{
+        struct drm_info_node *node = (struct drm_info_node *) m->private;
+        struct drm_device *dev = node->minor->dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct drm_i915_gem_object *obj;
+        size_t total_obj_size, total_gtt_size;
+        LIST_HEAD(stolen);
+        int count, ret;
+
+        ret = mutex_lock_interruptible(&dev->struct_mutex);
+        if (ret)
+                return ret;
+
+        total_obj_size = total_gtt_size = count = 0;
+        list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
+                if (obj->stolen == NULL)
+                        continue;
+
+                list_add(&obj->exec_list, &stolen);
+
+                total_obj_size += obj->base.size;
+                total_gtt_size += i915_gem_obj_ggtt_size(obj);
+                count++;
+        }
+        list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) {
+                if (obj->stolen == NULL)
+                        continue;
+
+                list_add(&obj->exec_list, &stolen);
+
+                total_obj_size += obj->base.size;
+                count++;
+        }
+        list_sort(NULL, &stolen, obj_rank_by_stolen);
+        seq_puts(m, "Stolen:\n");
+        while (!list_empty(&stolen)) {
+                obj = list_first_entry(&stolen, typeof(*obj), exec_list);
+                seq_puts(m, "   ");
+                describe_obj(m, obj);
+                seq_putc(m, '\n');
+                list_del_init(&obj->exec_list);
+        }
+        mutex_unlock(&dev->struct_mutex);
+
+        seq_printf(m, "Total %d objects, %zu bytes, %zu GTT size\n",
+                   count, total_obj_size, total_gtt_size);
+        return 0;
+}
+
 #define count_objects(list, member) do { \
         list_for_each_entry(obj, list, member) { \
                 size += i915_gem_obj_ggtt_size(obj); \
@@ -2114,6 +2176,7 @@ static struct drm_info_list i915_debugfs_list[] = {
         {"i915_gem_pinned", i915_gem_gtt_info, 0, (void *) PINNED_LIST},
         {"i915_gem_active", i915_gem_object_list_info, 0, (void *) ACTIVE_LIST},
         {"i915_gem_inactive", i915_gem_object_list_info, 0, (void *) INACTIVE_LIST},
+        {"i915_gem_stolen", i915_gem_stolen_list_info },
         {"i915_gem_pageflip", i915_gem_pageflip_info, 0},
         {"i915_gem_request", i915_gem_request_info, 0},
         {"i915_gem_seqno", i915_gem_seqno_info, 0},