freebsd stable - May 2012 - [stable 9]Dell R620 Ethernet Ordering

I'm trying to understand the newbus and acpi interactions on this Dell
R620 that result in the Broadcom adapter board being probed
"backwards"
or just plain out of order in comparison to the connector layout and the
linux tg3 driver. 

We seem to be detecting PCI0:2:0 before PCI0:1:0.  This seems odd to me.
When I replace the broadcom daughter card with an intel daughter card,
this does not show up, so I assume either a malfunction of the Dell ACPI
tables or the bge(4) driver.

http://people.freebsd.org/~sbruno/dell_12g_pciconf.txt

http://people.freebsd.org/~sbruno/r620_acpidump.txt

> Incidentally, does the broadcom driver in either 8 or 9 work for anyone?
When I try
> to use an 8 or 9 compiled in the past week I get unusable networking that
bounces up
> and down. I'm using an R620 with the quad-port broadcom daughtercard.
I'm using several Dell servers with FreeBSD 8.2-STABLE and the bge
driver. No problems that I can see.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no

On Sunday, May 27, 2012 06:43:43 PM Sean Bruno wrote:
> I'm trying to understand the newbus and acpi interactions on this Dell
> R620 that result in the Broadcom adapter board being probed
"backwards"
> or just plain out of order in comparison to the connector layout and the
> linux tg3 driver.
> 
> We seem to be detecting PCI0:2:0 before PCI0:1:0.  This seems odd to me.
> When I replace the broadcom daughter card with an intel daughter card,
> this does not show up, so I assume either a malfunction of the Dell ACPI
> tables or the bge(4) driver.
Oof, you confused me.  You are detecting bus PCI domain 0 bus 1 after PCI
domain 0 bus 2.  A dmesg would be more useful here.  FreeBSD walks the PCI 
tree in a deterministic depth-first order, and we enumerate host bridges in 
the order ACPI enumerates them.  Looking at the ACPI dump, you have 3 host 
bridges, PCI bus 0, and two uncore busses for your CPU sockets.  So busses 1 
and 2 must be children of bus 0.  It would seem that bus 2 comes before bus 1 
on PCI bus 0.  You can tell this by seeing what the parent pcibX device of 
busses 1 and 2 are and looking at the address of that pcibX device on PCI bus 
0.

-- 
John Baldwin