[PATCH 4/4] drm/panthor: Display heap chunk entries in DebugFS GEMS file

[Adrián Larumbe]

Expand the driver's DebugFS GEMS file to display entries for the heap
chunks' GEM objects, both those allocated at heap creation time through an
ioctl(), or in response to a tiler OOM event.

Signed-off-by: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>
---
 drivers/gpu/drm/panthor/panthor_heap.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/panthor/panthor_heap.c b/drivers/gpu/drm/panthor/panthor_heap.c
index db0285ce5812..520d1fcf5c36 100644
--- a/drivers/gpu/drm/panthor/panthor_heap.c
+++ b/drivers/gpu/drm/panthor/panthor_heap.c
@@ -139,6 +139,10 @@ static int panthor_alloc_heap_chunk(struct panthor_device *ptdev,
 	struct panthor_heap_chunk *chunk;
 	struct panthor_heap_chunk_header *hdr;
 	int ret;
+#ifdef CONFIG_DEBUG_FS
+	struct panthor_gem_object *obj;
+	const char *label;
+#endif
 
 	chunk = kmalloc(sizeof(*chunk), GFP_KERNEL);
 	if (!chunk)
@@ -180,6 +184,17 @@ static int panthor_alloc_heap_chunk(struct panthor_device *ptdev,
 	heap->chunk_count++;
 	mutex_unlock(&heap->lock);
 
+#ifdef CONFIG_DEBUG_FS
+	obj = to_panthor_bo(chunk->bo->obj);
+
+	mutex_lock(&ptdev->gems_lock);
+	list_add_tail(&obj->gems_node, &ptdev->gems);
+	mutex_unlock(&ptdev->gems_lock);
+
+	label = kstrdup_const("\"Tiler heap chunk\"", GFP_KERNEL);
+	panthor_gem_label_bo(chunk->bo->obj, label);
+#endif
+
 	return 0;
 
 err_destroy_bo:
-- 
2.48.1