+ /*
+ * fill in this function to allow the queue depth of this host
+ * to be changeable (on a per device basis). returns either
+ * the current queue depth setting (may be different from what
+ * was passed in) or an error. An error should only be
+ * returned if the requested depth is legal but the driver was
+ * unable to set it. If the requested depth is illegal, the
+ * driver should set and return the closest legal queue depth.
+ *
+ */
+ int (* change_queue_depth)(struct scsi_device *, int);
+
+ /*
+ * fill in this function to allow the changing of tag types
+ * (this also allows the enabling/disabling of tag command
+ * queueing). An error should only be returned if something
+ * went wrong in the driver while trying to set the tag type.
+ * If the driver doesn't support the requested tag type, then
+ * it should set the closest type it does support without
+ * returning an error. Returns the actual tag type set.
+ */
+ int (* change_queue_type)(struct scsi_device *, int);
+