CCBS_FOR_SCSIPI
sess->s_send_window = max(2, window_size(sess, CCBS_FOR_SCSIPI));
adapt->adapt_max_periph = CCBS_FOR_SCSIPI;
if (sess->s_refcount < CCBS_FOR_SCSIPI &&
sess->s_send_window < CCBS_FOR_SCSIPI) {
win = window_size(sess, CCBS_FOR_SCSIPI - sess->s_refcount);