cvs commit: src/sys/pci if_ste.c if_stereg.h

[Ruslan Ermilov]

ru          2004/04/06 00:58:32 PDT

  FreeBSD src repository

  Modified files:
    sys/pci              if_ste.c if_stereg.h 
  Log:
  - Improved the TX performance with polling(4) by only checking the
    status registers for error conditions and updating statistics
    when there are cycles left (inspired by the nge(4) driver).
  
  - Removed the TX list counter and the producer/consumer gap; it's
    enough to just ensure we don't reuse the last (free) descriptor,
    as the chip may not have read its next pointer yet.  If we reuse
    it, the TX may stall under a heavy TX load with polling enabled.
  
  - Dropped code to recharge the watchdog timer, it's pointless; the
    watchdog routine will re-init the chip and both RX and TX lists.
  
  Revision  Changes    Path
  1.70      +11 -15    src/sys/pci/if_ste.c
  1.15      +0 -1      src/sys/pci/if_stereg.h