drm/xe: Add debugfs for dumping GGTT mappings

Adding a debugfs dump of GGTT was useful for some debugging I did,
and easy to add. Might be useful for others too.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_ggtt.c b/drivers/gpu/drm/xe/xe_ggtt.c
index 20450ed8400b..907a603572b2 100644
--- a/drivers/gpu/drm/xe/xe_ggtt.c
+++ b/drivers/gpu/drm/xe/xe_ggtt.c
@@ -345,3 +345,16 @@ void xe_ggtt_remove_bo(struct xe_ggtt *ggtt, struct xe_bo *bo)
 
 	xe_ggtt_remove_node(ggtt, &bo->ggtt_node);
 }
+
+int xe_ggtt_dump(struct xe_ggtt *ggtt, struct drm_printer *p)
+{
+	int err;
+
+	err = mutex_lock_interruptible(&ggtt->lock);
+	if (err)
+		return err;
+
+	drm_mm_print(&ggtt->mm, p);
+	mutex_unlock(&ggtt->lock);
+	return err;
+}