formal way to map from pf to vfs when using VT-d?

Hi,

I'm using the igb/igbvf drivers. If I set igb.max_vfs=7,7,7,7 it creates 7 vfs for each of my pfs. So far so good.

Now, how do I map from a given pf to the PCI addresses for the set of vfs that are associated with it? I don't have virsh installed, so is there a way to query this with sysfs or something?

Thanks,
Chris

Chris Friesen
Software Designer

3500 Carling Avenue
Ottawa, Ontario K2H 8E9
www.genband.com

I think I found it.../sys/class/net/eth0/device/ has "virtfnX" entries which are symlinks to the appropriate pci address.

Chris

Here's a script used by our validation team, inserted inline.

#!/usr/bin/perl
use strict;

if ($#ARGV <1)

{
        print " Usage: ./list_vfs.pl Nic_name (t for Twinville, n for niantic, k for kawela, p for powerville) port_numer( 1 for first port, 2 for second port..) \n";

        exit ;
}

my $nic_name=$ARGV[0];
#my $port_n=$ARGV[1]%4;
my $all_vfs;
my $vf_str;
my $mode = 2;
my $my_pf_str;

if ($nic_name eq 't') {
        $my_pf_str= "\"10 Gigabit\"";
	$vf_str="\"Intel Corporation Device 1515\"";
} elsif ($nic_name eq 'n') {
	$my_pf_str="\"82599EB\"";
	$vf_str="\"82599 Ethernet Controller Virtual\"";
} elsif ($nic_name eq 'k') {
	$my_pf_str="\"82576 Gigabit Network Connection\"";
	$vf_str="\"Intel Corporation 82576 Virtual Function\"";
} elsif ($nic_name eq 'p') {
	$my_pf_str= "\"I350\"";
	$vf_str="\"Intel Corporation Device 1520\"";
	$mode=4;
} else {
	print "No such virtual Function device, please check again\n";
}

my $port_n=$ARGV[1]%$mode;

my $my_pf=qx(lspci | grep $my_pf_str | awk '{print \$1}' | awk 'NR%$mode==$port_n'); print "PF=$my_pf\n";
my $all_vfs=qx(lspci | grep $vf_str | awk '{print \$1}' | awk 'NR%$mode==$port_n'); print "VFs are:\n";
print "$all_vfs\n";

- Greg