diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 22fd94e..84ad48d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -463,6 +463,11 @@
  * @unref: release a reference previously taken with @ref. Note that
  *	initially the reference count is 1, making an initial @unref
  *	necessary to allow low power states.
+ * @dump_data: fill a data dump with debug data, maybe containing last
+ *	TX'ed commands and similar. When called with a NULL buffer and
+ *	zero buffer length, provide only the (estimated) required buffer
+ *	length. Return the used buffer length.
+ *	Note that the transport must fill in the proper file headers.
  */
 struct iwl_trans_ops {
 
@@ -511,6 +516,10 @@
 			      u32 value);
 	void (*ref)(struct iwl_trans *trans);
 	void (*unref)(struct iwl_trans *trans);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	u32 (*dump_data)(struct iwl_trans *trans, void *buf, u32 buflen);
+#endif
 };
 
 /**
@@ -664,6 +673,16 @@
 		trans->ops->unref(trans);
 }
 
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+static inline u32 iwl_trans_dump_data(struct iwl_trans *trans,
+				      void *buf, u32 buflen)
+{
+	if (!trans->ops->dump_data)
+		return 0;
+	return trans->ops->dump_data(trans, buf, buflen);
+}
+#endif
+
 static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
 				     struct iwl_host_cmd *cmd)
 {