> > See this post:
> > http://groups.yahoo.com/group/solarisx86/message/26749
>
> I didn't really understand what he was tryin to say in that post.
If you look at "prtconf -Dv" output, you'll notice that the interrupt handlers
for
the USB host controller devices all run at interrupt priority level 1 (ipl 1).
On
my S10 GA x86 box, I get:
% prtconf -Dv | egrep 'vector|driver'
...
pci925,1234, instance #0 (driver name: uhci)
Interrupt Priority=0x1 (ipl 1), vector=0xa (10)
...
pci1033,35, instance #1 (driver name: ohci)
Interrupt Priority=0x1 (ipl 1), vector=0xb (11)
...
pcie55,2928, instance #0 (driver name: ehci)
Interrupt Priority=0x1 (ipl 1), vector=0xa (10)
> The files he refers have only one forceattach entry in them. Can you please
> explain?
The idea is apparently to raise the ipl for the usb driver from ipl 1 to an ipl
higher
than the device that is blocking usb (audio?, ide/atapi?). The ipl can be
changed
by adding a line
interrupt-priorities=9;
to uhci.conf / ohci.conf / ehci.conf. That would raise the ipl for usb to ipl
9.
Note: Avoid interrupt priorities > 9, that would change the interrupt handler
to a
"high level" interrupt (see ddi_intr_hilevel(9F)) and the usb device driver
probably
won't handle high level interrupts.
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