Re: PATCH: ncr/sym drivers and bridges
Barrett G. Lyon (blyon@netpr.com)
Sun, 25 Jul 1999 19:22:01 -0700
At 07:57 PM 7/25/99 +0200, you wrote:
>
>I can propose a small preliminary patch that may be useful for ensuring
>that the ncr/sym drivers will not lose completions with some not PCI
>compliant bridges regarding flushing of posted write transactions.
>
>For now, the changes consist in the following:
>
>- Intel and IBM bridges are assumed fine.
>
>- Alpha bridges (21172 and friends) is ok for the sym53c8xx driver by just
> adding a dummy read in the interrupt handler. (The ncr53c8xx requires
> a minor change in the SCRIPTS in order to be ok for the 21172 and I will
> provide such a change after my vacations).
>
>- For other cases (ncr53c8xx under alpha included), the drivers may have
> to reap completions from its timer (ncr_timeout) handler.
> For the history, the original FreeBSD ncr.c still run such an handler
> and I donnot know of any other driver reaping interrupts this way.:)
>
>By the way, I cannot beleive some other drivers I know a bit to be really
>100% sure of not losing completions with some bridges I read about.
>
>The patch should apply to everything as ncr53c8xx-3.2* + sym53c8xx-1.3*
>up to latest.
>
>I am in vacation for the first half of August. Will refine the change
>as necessary after my vacation.
>
>I cannot test the patch since I only have x86 boxes, assumed ok.
>You may want to let me know asap if the patch makes problems.
With this patch I still get:
PYXIS machine check NOT expected on the SYM driver in 2.2.10-ac12 + your
patch.
In 2.2.10 I do not get the PYXIS errors.. I really need to move off of
2.2.10 because it has some serious problems.
-Barrett
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