How to see number of pci-slots

[Alexander Apprich]

Mitch,

Nifty Hat Mitch wrote:
> On Mon, Jan 17, 2005 at 02:49:24PM +0100, Alexander Apprich wrote:
> 
>>Phil Schaffner wrote:
>>
>>>On Mon, 2005-01-17 at 12:01 +0100, Alexander Apprich wrote:
>>>
>>>>Kam Leo wrote:
>>>>
>>>>>On Mon, 17 Jan 2005 10:01:16 +0100, Alexander Apprich
>>>>>
>>>>>>Roger Grosswiler wrote:
>>>>>>
>>>>>>>Alexander Apprich schrieb:
>>>>>>>
>>>>>>>>Roger Grosswiler wrote:
> 
> 
> 
>>>>>>>>>I would like to see all pci-slots on a system via shell, not only the
>>>>>>>>>used slots.
> 
> ....
> 
>>>>  root at elmstreet / # dmidecode | grep PCI | wc -l
>>>>  7
> 
> ....
> 
>>Well, Roger asked for number of PCI-Slots...
> 
> 
> I am not sure that there is a way to do exactly what
> I think the OP is asking.
> 

Well, as he didn't say anything it must be what he asked for :-)

> In some MB the difference between 1, 2, 3 and 4 PCI slots
> is simply the presence of a connector.  i.e. The chip set
> can support more than are wired on the PWB.
> 

As I said, this is allways possible.

> It is possible to count the bridge2pci interfaces but
> empty pci slots cannot be seen as far as I know (jtag?).
> 
>    "Dmidecode reports information about your system's hardware as
>    described in your system BIOS according to the SMBIOS/DMI standard
>    (see a sample output). This information typically includes system
>    manufacturer, model name, serial number, BIOS version, asset tag as
>    well as a lot of other details of varying level of interest and
>    reliability depending on the manufacturer. This will often include
>    usage status for the CPU sockets, expansion slots (e.g. AGP, PCI,
>    ISA) and memory module slots, and the list of I/O ports
>    (e.g. serial, parallel, USB)."
> 
> Since dmidecode is getting info from the BIOS it is possible for the
> vendor to know what the build list for the MB is and return the right
> info, but as far as I know software cannot "see" empty slots.
> 

Yep, it also possible that there is no info availible

apprich at sagnix apprich $ sudo /usr/local/bin/dmidecode
SYSID present.
RSD PTR found at 0xF6D60.
OEM PTLTD
PNP BIOS present.
apprich at sagnix apprich $ cat /etc/issue | head -n 1
Red Hat Linux release 9 (Shrike)

> Note also that many MBs have multiple PCI busses.  Some are dedicated
> for resources on the MB.  One or more will have connectors to plug
> stuff into.
> 

I agree that it may no work in 100% of all cases, but most of the time
it works :-)

apprich at c7po methods $ cat pci_slots
#!/usr/local/bin/perl -w

use strict;
use warnings;

my $dmi  = "/usr/local/bin/dmidecode";
my $host = "$ENV{HOST}";
my $pcicount = 0;

open IN, "$dmi|" or die "Cannot execute $dmi\n";
foreach my $key (<IN>) {
         next if ! ( $key =~ m/^.*Type\: 32bit.*PCI.*$/i );
         $pcicount++
}

Found 6 PCI Slots on altels
Found 6 PCI Slots on aragorn
Found 6 PCI Slots on avalon
Found 5 PCI Slots on beastie
Found 6 PCI Slots on bellona
Found 6 PCI Slots on bizkit
Found 6 PCI Slots on blondel
Found 6 PCI Slots on cantor
Found 5 PCI Slots on deneb
Found 6 PCI Slots on earth
Found 5 PCI Slots on elise
Found 6 PCI Slots on elmstreet
Found 5 PCI Slots on gerda
Found 7 PCI Slots on ginga
Found 5 PCI Slots on hydra
Found 5 PCI Slots on inti
Found 5 PCI Slots on ivar
Found 6 PCI Slots on kai
Found 6 PCI Slots on legolas
Found 6 PCI Slots on magellan
Found 6 PCI Slots on marica
Found 6 PCI Slots on nebula
Found 6 PCI Slots on photonix
Found 6 PCI Slots on sindibad
Found 4 PCI Slots on terminalix
Found 6 PCI Slots on titan
Found 6 PCI Slots on titania
Found 6 PCI Slots on vanquish
Found 5 PCI Slots on wurzelausix

I checked them all and dmidecode was right in all cases.

Alex