cvs commit: src/sys/dev/sym sym_hipd.c

Stefan Esser se at
Fri Jul 20 23:02:11 UTC 2007

se          2007-07-20 23:02:01 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/sym          sym_hipd.c 
  Fix Symbios driver on amd64: Since amd64 has 64 bit pointers but the same
  4KB pages as i386, data structures that just fit in one page on i386 (and
  on 64 bit architectures with 8KB pages) can be distributed over two pages
  on amd64. This is a porblem in the case of the Symbios driver, since the
  SCRIPTS engine in the SCSI chip operates on physical addresses and needs
  physically contiguous memory. Earlier patches used contigmalloc on amd64,
  but this version replaces part of a structure by a pointer to that data.
  In order to not introduce an extra indirection for other architectures,
  the change has been made conditional on __amd64__.
  Earlier attempts to repair this problem are removed (i.e. the macros that
  made amd64 use contigmalloc). The fix was submitted by Jan Mikkelsen and
  modified by me to only affect amd64.
  PR:             89550
  Submitted by:   janm at transactionware dot com (Jan Mikkelsen)
  Approved by:    re (Hiroki Sato)
  MFC after:      2 weeks
  Revision  Changes    Path
  1.67      +17 -12    src/sys/dev/sym/sym_hipd.c

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