[wlug] Xen pci pass through

20 Nov 2013


      Hi all out there,

For the last few weeks i have been playing with xen and asterisk
I have now got the base install completed and have a few extentions working
internally

The part i am up to now is assigning my tdm400 card over to the asterisk pvm

I have completed the lspci with the tv flags
Here is the output:
-[0000:00]-+-00.0  Intel Corporation 82P965/G965 Memory Controller Hub
           +-02.0  Intel Corporation 82G965 Integrated Graphics Controller
           +-03.0  Intel Corporation 82P965/G965 HECI Controller
           +-19.0  Intel Corporation 82566DC Gigabit Network Connection
           +-1a.0  Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #4
           +-1a.1  Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #5
           +-1a.7  Intel Corporation 82801H (ICH8 Family) USB2 EHCI
Controller #2
           +-1b.0  Intel Corporation 82801H (ICH8 Family) HD Audio
Controller
           +-1c.0-[01]--
           +-1c.1-[02]----00.0  Marvell Technology Group Ltd. 88SE6101/6102
single-port PATA133 interface
           +-1c.2-[03]--
           +-1c.3-[04]--
           +-1c.4-[05]--
           +-1d.0  Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #1
           +-1d.1  Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #2
           +-1d.2  Intel Corporation 82801H (ICH8 Family) USB UHCI
Controller #3
           +-1d.7  Intel Corporation 82801H (ICH8 Family) USB2 EHCI
Controller #1
           +-1e.0-[06]--+-00.0  Texas Instruments TSB43AB23 IEEE-1394a-2000
Controller (PHY/Link)
           |            +-01.0  Realtek Semiconductor Co., Ltd. RTL8169 PCI
Gigabit Ethernet Controller
           |            +-02.0  Tiger Jet Network Inc. Tiger3XX Modem/ISDN
interface
           |            \-03.0  Texas Instruments TSB43AB22A IEEE-1394a-2000
Controller (PHY/Link) [iOHCI-Lynx]
           +-1f.0  Intel Corporation 82801HH (ICH8DH) LPC Interface
Controller
           +-1f.2  Intel Corporation 82801 SATA Controller [RAID mode]
           \-1f.3  Intel Corporation 82801H (ICH8 Family) SMBus Controller

I have also written/copied a couple of scripts to make things nice and easy

start_pci.sh - used to get it all running ( hide and assign the device to xl
etc)
#!/bin/bash
/data/domains/windows/start_pci1.sh 0000:06.2.0
modprobe xen-pciback 'hide=(0000:06.2.0)'
xl pci-assignable-add 06.2.0

and also start_pci1.sh - used to get it all ready

#!/bin/bash
if [ $# -eq 0 ]; then
    echo "Require PCI devices in format:  <domain>:<bus>:<slot>.<function>"
    echo "Eg: $(basename $0) 0000:00:1b.0"
    exit 1
fi
modprobe xen-pciback
for pcidev in $@; do
    if [ -h /sys/bus/pci/devices/"$pcidev"/driver ]; then
        echo "Unbinding $pcidev from" $(basename $(readlink
/sys/bus/pci/devices/"$pcidev"/driver))
        echo -n "$pcidev" > /sys/bus/pci/devices/"$pcidev"/driver/unbind
    fi
    echo "Binding $pcidev to pciback"
    echo -n "$pcidev" > /sys/bus/pci/drivers/pciback/new_slot
    echo -n "$pcidev" > /sys/bus/pci/drivers/pciback/bind
done

now when I try and get it all running I get the following errors

Binding 0000:06.2.0 to pciback
/data/domains/windows/start_pci1.sh: line 17: echo: write error: Invalid
argument
/data/domains/windows/start_pci1.sh: line 18: echo: write error: No such
device
pci-assignable-add: malformed BDF specification "06.2.0"

if anyone can help I can supply beer :)

Jonathan

[wlug] Xen pci pass through

Jonathan Wood