mly_command_packet
sp[0] = ((sizeof(union mly_command_packet) * MLY_MMBOX_COMMANDS) / 1024);
union mly_command_packet *pkt;
mc->mc_packet->generic.maximum_sense_size = sizeof(union mly_command_packet);
ncmd * sizeof(union mly_command_packet),
mc->mc_packetphys = sc->mly_packetphys + (i * sizeof(union mly_command_packet));
sizeof(union mly_command_packet) * MLY_MAX_COMMANDS, 1, /* maxsize, nsegments */
union mly_command_packet CommandMailbox;
union mly_command_packet mmm_command[MLY_MMBOX_COMMANDS];
union mly_command_packet *mc_packet; /* our controller command */
union mly_command_packet *mly_packet; /* command packets */