1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panthor/panthor_heap.c b/drivers/gpu/drm/panthor/panthor_heap.c
index 3796a9eb22af..db0285ce5812 100644
--- a/drivers/gpu/drm/panthor/panthor_heap.c
+++ b/drivers/gpu/drm/panthor/panthor_heap.c
@@ -603,3 +603,29 @@ void panthor_heap_pool_destroy(struct panthor_heap_pool *pool)
 
 	panthor_heap_pool_put(pool);
 }
+
+/**
+ * panthor_heap_pool_size() - Calculate size of all chunks across all heaps in a pool
+ * @pool: Pool whose total chunk size to calculate.
+ *
+ * This function adds the size of all heap chunks across all heaps in the
+ * argument pool. It also adds the size of the gpu contexts kernel bo.
+ * It is meant to be used by fdinfo for displaying the size of internal
+ * driver BO's that aren't exposed to userspace through a GEM handle.
+ *
+ */
+size_t panthor_heap_pool_size(struct panthor_heap_pool *pool)
+{
+	struct panthor_heap *heap;
+	unsigned long i;
+	size_t size = 0;
+
+	down_read(&pool->lock);
+	xa_for_each(&pool->xa, i, heap)
+		size += heap->chunk_size * heap->chunk_count;
+	up_read(&pool->lock);
+
+	size += pool->gpu_contexts->obj->size;
+
+	return size;
+}