Brian Ruthven - Solaris Network Sustaining - Sun UK wrote:
Another avenue of Sbus machine testing could be the old Enterprise
Server range such as the E4500 which was very popular, and last time I
checked (about a year ago) is still in use at a number of customer
sites. These are (mostly) SBus-based, and IIRC, have a hme port on
each I/O board. They would certainly accept the SBus version of the
qfe card. I'm not sure whether we produced SBus hme cards or not.
We did... they were a combo card with SCSI and hme both. (SunSwift
cards.)
- Garrett
Regards,
Brian
James Legg wrote:
Hi Garret,
I could find you an Ultra 10 with onboard hme in our lab and arrange
remote access if you needed something to test on if that is any use?
I think the last couple of Ultra 2s we keep around are in cold
storage these days, but I might be able to dig one out and a card
perhaps as well.
Let me know this would be helpful.
-James
Garrett D'Amore wrote:
Earlier this week I got yet another request for qfe support for x86
systems. I get these requests fairly periodically. I guess there
are a lot of 4-port qfe cards still out there.
This last one finally gave me the impetus to do the work to do the
port. What I want to do is poll the community on this, because I'm
going to need help:
1) testing -- my last SPARC system with onboard hme died a while
back
2) testing -- I have no sbus hme ports -- a Sun Ultra 2 or some
other system with sbus qfe or sunswift would be helpful here.
3) review -- as part of this effort I've removed all the legacy
dvma and on-demand DMA resource allocation, and replaced it with a
very simple "preallocated" DMA region/bcopy -- this is typical for
most simple 1G and slower ethernet NICs today. (This eliminated
about 1000 lines from the driver.)
4) perf. testing -- the above changes "potentially" have
performance impact. I think on any supported CPU that these cards
run on, the simplifications will greatly outweigh the savings
formerly afforded by the "private" dvma interface this driver used
to use
Now, the good news is that the entire effort here has only taken me
a few hours. But I figure if I can help out some of these folks
with those older qfe cards, its probably worth it. And the
simplification in the code, and getting one closer to elimination of
the "private" dvma interface is IMO a worthy goal.
I'd also like to convert this driver (and also eri and dmfe) to
support Brussels. If some enterprising community member wants to
help out, let me know.
-- Garrett
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