scottl 95301ebbdf Commit ATAPI-CAM for ATAmkIII. Improvements and changes:
- newbus plumbing.  Each atapicam bus is a child off of a parent ata channel
  bus.  This is somewhat of a hack, but allows the ata core to be completely
  free of atapicam knowledge.
- No more global lists of softc's and no more groping around in internal ata
  structures on each command.
- Giant-free operation of the completion handler.
- Per-bus mutex for protecting the busy list and synchronizing detach.
- Lots of streamlining and dead code elimination, better adherence to the
  CAM locking protocol.

This feature still requires that the appropriate atapi-* driver be present
for each atapi device that you want to talk to (i.e. atapi-cd for cdroms).
It does work both compiled into the kernel and as a loadable module.

Reviewed by: thomas, sos
2005-04-05 02:03:31 +00:00
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