Date: Fri, 28 Jul 2000 06:43:20 -0700 (PDT) From: Matthew Jacob <mjacob@feral.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: "Koster, K.J." <K.J.Koster@kpn.com>, "'FreeBSD Alpha mailing list'" <freebsd-alpha@FreeBSD.ORG> Subject: RE: fxp0 hangs my AXPpci33 Message-ID: <Pine.BSF.4.10.10007280637430.60544-100000@beppo.feral.com> In-Reply-To: <14721.35393.181226.803212@grasshopper.cs.duke.edu>
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> I'm reluctant to commit it because I don't really understand why it
> works. It was just a shot-in-the-dark kind of thing..
>
> Does anybody have any ideas why using I/O port access should work,
> while using the memory mapped access wouldn't? Matt, Doug?
>
>
> The only thing I can think of is that memory mapped access is
> generally broken on the apecs/lca.. But the NCR driver works, and it
> uses memory mapped access..
>
They're not the same kind of device at all.
So, why does I/O access also break on Qlogic cards on alphas? They work just
peachy on i386. And there are many fine cards that work fine with I/O instead
of mem access on alpha....
Look- I've had the
if (getenv_int("isp_mem_map", &bitmap)) {
if (bitmap & (1 << unit)) {
m1 = PCIM_CMD_MEMEN;
m2 = PCIM_CMD_PORTEN;
}
}
bitmap = 0;
if (getenv_int("isp_io_map", &bitmap)) {
if (bitmap & (1 << unit)) {
m1 = PCIM_CMD_PORTEN;
m2 = PCIM_CMD_MEMEN;
}
}
stuff in isp_pci since newbus came in. Somebody should add the same to if_fxp
(or some more general selector solution) and make this an alpha HARDWARE.TXT
entry ("On AXPpci33/Multia, fxp needs to be set for mem_only mapping").
-matt
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