IXP_BD_NUMS
port->fragfr = port->nframes / IXP_BD_NUMS;
port->bdl_size = sizeof (audioixp_bd_entry_t) * IXP_BD_NUMS;
for (int i = 0; i < IXP_BD_NUMS; i++) {
(((i + 1) % IXP_BD_NUMS) * sizeof (audioixp_bd_entry_t)));