Onboard SCSI controller support on Ultra 2
Pyun YongHyeon
yongari at kt-is.co.kr
Thu Feb 17 22:39:41 PST 2005
On Thu, Feb 17, 2005 at 11:06:03PM +0100, Marius Strobl wrote:
> On Thu, Feb 17, 2005 at 11:48:34AM +0900, Pyun YongHyeon wrote:
> > On Wed, Feb 16, 2005 at 02:02:08PM +0100, Marius Strobl wrote:
> > [...]
> > >
> > > >
> > > > > > The prob i did find was with QFE card support; they all appear as
> > > > > > hme, have the correct individual MAC addresses--- but little else,
> > > > > > and errors galore.
> > > >
> > > > The QFE actually *is* a quad HME card, that's why FreeBSD uses the
> > > > same driver for it. What kind of problems do you have with it?
> > > >
> > > > I've only used PCI-based QFEs so far, but never encountered any
> > > > problems with them -- they even make a fine Quad card in IA32 machines
> > > > now that FreeBSD supports them outside of OpenFirmware systems.
> > > >
> > >
> > > AFAIK the SBus QFE cards only have a single interrupt for all four
> > > HMEs and the FreeBSD hme(4) doesn't take this into account.
> > >
> > AFAIK HME interrupt handler is called with softc argument. So I guess
> > there is no problem since it can correctly find an instance of softc
> > and related information.
>
> Depends on how it actually works. I can't remember were I read about it
> but my impression was that it doesn't work like a shared IRQ in the
> usual sense.
> Anyway, there were reports in the past that SBus QFE don't work properly
> and act like not getting interrupts.
>
Then it seems the SBus QFE has single interrupt source. If this is
the case hme(4) should be taught to look into all instances of QFE
softc. Adding a code to inspect all softc(maybe be seperate
interrupt handler wrapper that calls real interrupt handler for each
port) would be simple but I guess it also needs special attach/detach
routine for QFE and hme(4) should know a global softc where it starts
the traverse.
--
Regards,
Pyun YongHyeon
http://www.kr.freebsd.org/~yongari | yongari at freebsd.org
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