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Date: Fri, 26 Jan 1996 18:33:51 -0800 (PST)
From: Bruce Evans <bde>
Message-Id: <199601270233.SAA16081@freefall.freebsd.org>
To: CVS-committers, cvs-sys
Subject: cvs commit: src/sys/i386/isa/sound dmabuf.c
Sender: owner-commit@FreeBSD.ORG
Precedence: bulk

bde         96/01/26 18:33:50

  Modified:    sys/i386/i386  machdep.c
               sys/i386/include  md_var.h
               sys/i386/isa  fd.c isa.c wt.c
               sys/i386/isa/sound  dmabuf.c
  Log:
  Allocate DMA bounce buffers only when requested by drivers.  Only the
  fd and wt drivers need bounce buffers, so this normally saves 32K-1K
  of kernel memory.
  
  Keep track of which DMA channels are busy.  isa_dmadone() must now be
  called when DMA has finished or been aborted.
  
  Panic for unallocated and too-small (required) bounce buffers.
  
  fd.c:
  There will be new warnings about isa_dmadone() not being called after
  DMA has been aborted.
  
  sound/dmabuf.c:
  isa_dmadone() needs more parameters than are available, so temporarily
  use a new interface isa_dmadone_nobounce() to avoid having to worry
  about panics for fake parameters.  Untested.
  
  Revision  Changes    Path
  1.173     +1 -9      src/sys/i386/i386/machdep.c
  1.6       +1 -2      src/sys/i386/include/md_var.h
  1.78      +2 -1      src/sys/i386/isa/fd.c
  1.63      +67 -17    src/sys/i386/isa/isa.c
  1.29      +2 -1      src/sys/i386/isa/wt.c
  1.22      +4 -1      src/sys/i386/isa/sound/dmabuf.c