[PATCH][2.6] JS20 support

Jake Moilanen moilanen at austin.ibm.com
Wed Nov 26 01:28:10 EST 2003

> Why is this needed on a JS20 blade?  My understanding is that this
> patch is needed in a partitioned environment where we may get function
> N of a PCI-PCI bridge assigned to a partition but not function 0.  The
> JS20 blade isn't partitioned, so why do we need this patch?

You are correct, the JS20 blade is not partitioned.  But on the 8111 the
the second device is the LPC bus, IDE controller, and some other
controllers we don't use.  On this second device the LPC bus is function
0 and function 1 is the IDE controller.

Firmware wanted to keep the LPC bus hidden since it is not available for
use and if AIX sees an ISA bus, it will assume it has a certain level of
ISA functionality.  Because of this firmware does not have a function 0
in the device-tree.  So without this patch we will not see the IDE


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