Well, hello there, #iwm 9k 
# ifconfig iwm0 scan | grep nwid | wc -l
52
Follow
And here is a diff for testing with 9260 and 9560 #iwm devices: https://marc.info/?l=openbsd-tech&m=157391965606322&w=2
Receive performance is bad with this diff. But it's already better than nothing.
@stsp
That will help throughput!
Always wait for the second diff!
It's almost identical but I tweaked the Rx config register settings to fix a huge amount of received packets getting lost.
https://marc.info/?l=openbsd-tech&m=157392072807186&w=2
#iwm #openbsd