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>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index a1f4c91fb11265dfca517f6662d0dd55adb1644a..1a87cc9fd899992f4dc6241707eafd8610ff45c2 100644 (file)
--- 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},