You shouldn't be able to do this since ahc(4) does not support
simultaneous target/initiator mode.
It can, you just need to disable the multi-target-id feature to do
it. I should probably modify the driver so that it will allow dual
mode operation so long as only one target-id is set and it corresponds
to the initiator's id.
I would REALLY appreciate this since it would allow target mode testing on
a single HBA (i.e. 7890) without any external cabling.