cvs commit: src/sys/dev/mpt mpt.c

[Scott Long]

scottl      2008-03-31 21:54:05 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/mpt          mpt.c 
  Log:
  The MPT driver treats the "core" module with the same importance and
  abstraction as the RAID and CAM modules, making it nearly impossible
  for enough initialization to be done in time for the RAID module to
  know whether to attach.  On top of this, no reset was being done on
  the controller on attach, in violation of the spec.  Additionally,
  the port enable step was being deferred to the end of the attach
  process, long after it should have been done to ensure reliable
  operation from the controller.  Fix all of these with a few hacks
  to force the "attach" and "enable" steps of the core module early
  on, and ensure that a reset and port enable also happens early on.
  In the future, the driver needs to be refactored to eliminate the
  core module abstraction, clean up withe reset/enable steps, and
  defer event messages until all of the modules are available to
  recieve them.
  
  Revision  Changes    Path
  1.47      +7 -4      src/sys/dev/mpt/mpt.c