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From: Marius Strobl <marius@FreeBSD.org>
Date: Wed, 14 Jan 2009 21:08:43 +0000 (UTC)
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X-FreeBSD-CVS-Branch: RELENG_6
Subject: cvs commit: src/sys/dev/dcons dcons_crom.c
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marius      2009-01-14 21:08:43 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/dev/dcons        dcons_crom.c 
  Log:
  SVN rev 187242 on 2009-01-14 21:08:43Z by marius
  
  MFC: r185108
  
  Given that the buffer dcons_crom(4) exposes is used for both input
  and output, set BUS_DMA_COHERENT when creating the DMA map used for
  loading the buffer. As a side-effect this solves locking issues on
  sparc64 when dcons(4) calls bus_dmamap_sync(9) while in an interrupt
  filter, which are executed in a critical section, and iommu(4) has
  to use a sleep lock when taking advantage of the streaming buffer.
  
  Reported and tested by: kensmith
  Approved by:            simokawa
  
  Revision  Changes    Path
  1.6.2.2   +1 -1      src/sys/dev/dcons/dcons_crom.c