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Date:      Wed, 03 May 2000 12:49:23 -0700
From:      Mike Smith <msmith@freebsd.org>
To:        "Shawn Barnhart" <swb@grasslake.net>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: HPDA/DAC960PL errors 
Message-ID:  <200005031949.MAA00506@mass.cdrom.com>
In-Reply-To: Your message of "Wed, 03 May 2000 13:40:40 CDT." <00c801bfb52f$150f2e30$b8209fc0@marlowe> 

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> 
> | (Just to continue talking to myself) - The reason I never ran into this,
> | I realised, is that I did all my work on the 2.x firmware in Alpha
> | systems which have an 8k page size.  With a 64k d_maxio, you'll never see
> | more than 9 segments.
> |
> | Sorry about this.
> 
> I'm just glad I found the problem for you.
> 
> I'd like to get this server built using this DAC sooner rather than later,
> and it's likely I can get 3.x firmware from Mylex before you'll update the
> driver (no offense meant).

None taken.  Unfortunately the 3.x firmware is probably going to have the 
same problem; we cap at 16 S/G segments there as well.

> If there's a ghost of a chance you might have a
> fix you want tested completed before this time next week, let me know and
> I'll hold off installing 3.x chips to test the fix -- an install, full CVS
> update, and a make world ought to be a decent test?  I could probably do
> something

That'd do it, certainly.

> I have two other DAC960s, but they both suffer from the ""couldn't allocate
> mailbox window" problem you're also working on, so they might not be decent
> test subjects unless you want to try to fix both problems at once.  :)

I know what's going on there - I don't support I/O mapped controllers at 
all.  I'm not sure that I want to, either, yet; there is a performance 
cost that extends to other controllers if I do.  If you can narrow down 
the differences between the controllers that come up I/O mapped and those 
that come up memory-mapped, I'd really appreciate it.  It's possible that 
the I/O mapped ones can be convinced to memory-map if I can work out 
what's wrong.

-- 
\\ Give a man a fish, and you feed him for a day. \\  Mike Smith
\\ Tell him he should learn how to fish himself,  \\  msmith@freebsd.org
\\ and he'll hate you for a lifetime.             \\  msmith@cdrom.com




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