ETXD_INTWHENDONE
desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_D0V | w0);
desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE |
desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_B1V | w0);