Re: PCI device order problem

[H. J. Lu]

On Thu, Oct 24, 2002 at 07:49:41PM -0400, Jeff Garzik wrote:
> H. J. Lu wrote:
> 
> >In arch/i386/kernel/pci-pc.c, there are
> >
> >/*
> > * Sort the device list according to PCI BIOS. Nasty hack, but since some
> > * fool forgot to define the `correct' device order in the PCI BIOS specs
> > * and we want to be (possibly bug-to-bug ;-]) compatible with older kernels 
> > * which used BIOS ordering, we are bound to do this... 
> > */
> >
> >static void __devinit pcibios_sort(void)
> >
> >The problem is on my MB:
> >
> >00:00.0 Host bridge: Intel Corp. e7500 [Plumas] DRAM Controller (rev 03)
> >00:00.1 Class ff00: Intel Corp. e7500 [Plumas] DRAM Controller Error Reporting ( rev 03)
> >00:03.0 PCI bridge: Intel Corp. e7500 [Plumas] HI_C Virtual PCI Bridge (F0) (rev 03)
> >00:03.1 Class ff00: Intel Corp. e7500 [Plumas] HI_C Virtual PCI Bridge (F1) (rev 03)
> >00:1d.0 USB Controller: Intel Corp. 82801CA/CAM USB (Hub  (rev 02)
> >00:1d.1 USB Controller: Intel Corp. 82801CA/CAM USB (Hub  (rev 02)
> >00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB PCI Bridge (rev 42)
> >00:1f.0 ISA bridge: Intel Corp. 82801CA ISA Bridge (LPC) (rev 02)
> >00:1f.1 IDE interface: Intel Corp. 82801CA IDE U100 (rev 02)
> >00:1f.3 SMBus: Intel Corp. 82801CA/CAM SMBus (rev 02)
> >01:0c.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
> >02:1c.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 03)
> >02:1d.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 03)
> >02:1e.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 03)
> >02:1f.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 03)
> >03:07.0 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet Controller (rev 01)
> >03:07.1 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet Controller (rev 01)
> >03:08.0 RAID bus controller: 3ware Inc 3ware 7000-series ATA-RAID (rev 01)
> >
> >Eth1 becomes:
> >03:07.0 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet Controller (rev 01)
> >
> >and eth0 becomes:
> >03:07.1 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet Controller (rev 01)
> >
> >Is that a good idea to have an option to sort the PCI device by PCI bus and
> >slot numbers?
> >  
> >
> 
> Without answering your specific question, but addressing $subject, what 
> problem is caused by the PCI device order you see?

It is different from the hardware documentation. The hardware manual says
it has 2 NICs, NIC 1 (03:07.0) and NIC2 (03:07.1), which makes senses
to me. NIC 1 is a special one which supports IPMI over LAN. Since we
only use one NIC now, we'd like to use NIC 1 and call it eth0.

H.J.