drm: Add memory manager debug function
drm_mm_debug_table will print the memory manager state
in table allowing to give a snapshot of the manager at
given point in time. Usefull for debugging.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index a5c2773..d7d7eac 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -469,6 +469,26 @@
}
EXPORT_SYMBOL(drm_mm_takedown);
+void drm_mm_debug_table(struct drm_mm *mm, const char *prefix)
+{
+ struct drm_mm_node *entry;
+ int total_used = 0, total_free = 0, total = 0;
+
+ list_for_each_entry(entry, &mm->ml_entry, ml_entry) {
+ printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8ld: %s\n",
+ prefix, entry->start, entry->start + entry->size,
+ entry->size, entry->free ? "free" : "used");
+ total += entry->size;
+ if (entry->free)
+ total_free += entry->size;
+ else
+ total_used += entry->size;
+ }
+ printk(KERN_DEBUG "%s total: %d, used %d free %d\n", prefix, total,
+ total_used, total_free);
+}
+EXPORT_SYMBOL(drm_mm_debug_table);
+
#if defined(CONFIG_DEBUG_FS)
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm)
{
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index b40b2f0..4c10be3 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -133,6 +133,7 @@
return block->mm;
}
+extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
#ifdef CONFIG_DEBUG_FS
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
#endif
