cvs commit: src/sys/sparc64/pci psycho.c psychoreg.h

[Marius Strobl]

marius      2007-05-01 13:31:33 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/sparc64/pci      psycho.c psychoreg.h 
  Log:
  MFC: psycho.c 1.61; psychoreg.h 1.12
  
  o Changes to psycho_attach(): [1]
    - Clear the PCI AFSR and status error bits as previous errors still
      might be indicated.
    - Set up the PCI control and diagnostic registers according to the
      capabilities, workarounds, etc of/for specific revisions of the
      supported bridges. This includes no longer setting Hummingbird-/
      Sabre-specific bits in the PCI control register but preserving
      what the firmware has initialized them to like OpenSolaris does.
      Previously we were setting these bits according to the example in
      the Sabre documentation, which I doubt is appropriate for all
      Sabre based designs and especially not for Hummingbirds. This
      also includes not enabling bus parking unless the firmware tells
      us to.
    - Set the PCI latency timer register as this isn't always done by
      the firmware.
  o Remove a redundant argument from psycho_set_intr() and in this
    function check the return value of bus_setup_intr(). [2]
  o Let psycho_setup_intr() return ENOMEM instead of 0 when it can't
    allocate memory for the interrupt wrapper stub and EINVAL instead
    of 0 if it can't find the interrupt vector in the interrupt map.
  o Add a workaround for a bug of the Sabre-APB-combination where it
    doesn't drain DMA write data for devices behind additional PCI-PCI
    bridges underneath the APB PCI-PCI bridge. This workaround (do
    things necessary in order to achieve a manual drain when coherency
    is required) is currently implemented in psycho_setup_intr() and
    psycho_intr_stub() due to lack of a real BUS_GET_DMA_TAG() and
    psycho(4)-specific bus_dma_tag_create() and bus_dmamap_sync()
    methods, respectively, in RELENG_6 and therefore is only applied
    for interrupt handlers but not for polling(4) callbacks. [3]
  o Fix some minor style issues.
  
  Info from:      OpenSolaris [1]
  Info from:      Linux, OpenBSD, OpenSolaris [3]
  Suggested by:   Coverity Prevent (CID 682) [2]
  
  Revision  Changes    Path
  1.53.2.3  +189 -55   src/sys/sparc64/pci/psycho.c
  1.9.2.2   +36 -9     src/sys/sparc64/pci/psychoreg.h