cvs commit: src/sys/dev/ata atapi-cam.c

[Scott Long]

scottl      2005-04-05 02:03:31 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/ata          atapi-cam.c 
  Log:
  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
  
  Revision  Changes    Path
  1.36      +186 -151  src/sys/dev/ata/atapi-cam.c