Re: sio: lots of silo overflows on Asus K8V with Moxa Smartio C104H/PCI

On Mon, 26 Apr 2004 23:48:46 +1000 (EST) Bruce Evans wrote:

> On Mon, 26 Apr 2004, Burkard Meyendriesch wrote:
> 
> > on my Asus K8V with Moxa Smartio C104H/PCI I get lots of silo
> > overflows when backing up my Palm over a serial line, even at 19.200
> > baud.
> >
> > What's going wrong here? And what can I do?
> > ...
> 
> You seem to have trimmed too much from the boot messages (I trimmed
> the rest).  sio5 is not there.
> 
> > /var/log/messages after boot -v:
> > Apr 24 14:09:00 Reineke kernel: Mounting root from ufs:/dev/ad10s1a
> > Apr 24 14:09:00 Reineke kernel: ata6: spurious interrupt -
> > status=0x50 error=0x00 Apr 24 14:09:00 Reineke last message repeated
> > 4 times Apr 24 14:09:00 Reineke kernel: start_inata6: spurious
> > interrupt - status=0x50 error=0x00 Apr 24 14:09:00 Reineke kernel:
> > ata6: spurious interrupt - status=0x50 error=0x00 Apr 24 14:09:01
> > Reineke last message repeated 666 times Apr 24 14:09:01 Reineke
> > named[301]: starting BIND 9.2.3..
> >
> > Apr 26 11:03:12 Reineke kernel: sio5: 1 more silo overflow (total
> > 43) Apr 26 11:03:12 Reineke kernel: ata6: spurious interrupt -
> > status=0x50 error=0x00 Apr 26 11:03:32 Reineke last message repeated
> > 172 times Apr 26 11:03:33 Reineke kernel: sio5: 1 more silo overflow
> > (total 44) Apr 26 11:03:33 Reineke kernel: ata6: spurious interrupt
> > - status=0x50 error=0x00 Apr 26 11:03:43 Reineke last message
> > repeated 21 times Apr 26 11:03:44 Reineke kernel: sio5: 1 more silo
> > overflow (total 45)
> 
> sio5's interrupt might be misconfigured.  If it has none, then it is
> supposed to fall back to polled mode but should still get less
> overflows than above.  ata6 seems to be getting sio5's interrupts.
> 
> In general, puc must be used with sio except for isa ports, and all
> sio interrupts should be unshared.  For pci sio cards, making the
> interrupt unshared may require juggling pci slots or using APIC mode.
> 
Sorry, I forgot to send the sio's boot message (I forgot it because it
didn't say anything in boot -v mode). Here are the boot messages:

Apr 30 10:13:38 Reineke kernel: puc0: <Moxa Technologies, Smartio C104H/PCI> port 0xa000-0xa00f,0xa400-0xa43f,0xa800-0xa87f irq 19 at device 14.0 on pci0
Apr 30 10:13:38 Reineke kernel: puc0: Reserved 0x40 bytes for rid 0x18 type 4 at 0xa400
Apr 30 10:13:38 Reineke kernel: sio4: <Moxa Technologies, Smartio C104H/PCI> on puc0
Apr 30 10:13:38 Reineke kernel: sio4: type 16550A
Apr 30 10:13:38 Reineke kernel: sio4: unable to activate interrupt in fast mode - using normal mode
Apr 30 10:13:38 Reineke kernel: sio5: <Moxa Technologies, Smartio C104H/PCI> on puc0
Apr 30 10:13:38 Reineke kernel: sio5: type 16550A
Apr 30 10:13:38 Reineke kernel: sio5: unable to activate interrupt in fast mode - using normal mode
Apr 30 10:13:38 Reineke kernel: sio6: <Moxa Technologies, Smartio C104H/PCI> on puc0
Apr 30 10:13:38 Reineke kernel: sio6: type 16550A
Apr 30 10:13:38 Reineke kernel: sio6: unable to activate interrupt in fast mode - using normal mode
Apr 30 10:13:38 Reineke kernel: sio7: <Moxa Technologies, Smartio C104H/PCI> on puc0
Apr 30 10:13:38 Reineke kernel: sio7: type 16550A
Apr 30 10:13:38 Reineke kernel: sio7: unable to activate interrupt in fast mode - using normal mode

Meanwhile I plugged the Moxa board into another PCI slot of my motherboard
and the conflict with the ata6 interrupt seems to be solved. The silo over-
flows are still there.

By the way: How should I set the BIOS parameters "PCPI 2.0 yes/no" and
"ACPI APIC yes/no"? Do they have anything to do with the PCI interrupt
behaviour?

Burkard

--
Burkard Meyendriesch
Stevern 2
D-48301 Nottuln