[stable 9]Dell R620 Ethernet Ordering

[John Baldwin]

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