Re: [Xen-users] PCI devices forwarded but does not work

[Todd Deshane <todd.deshane@xxxxxxx>]

On Tue, Aug 30, 2011 at 2:55 PM, MisterE <MisterE2002@xxxxxxxxx> wrote:
> Hello Xen folks,
>
>
> I use Debian Squeeze
> I seize a soundcard (inc. HDMI) and a network card with the next kernel 
> parameters:
> module  /vmlinuz-2.6.32-5-xen-amd64 placeholder 
> root=/dev/mapper/vg_dom0-lv_root ro  xen-pciback.permissive 
> xen-pciback.hide=(00:14.2)(01:05.1)(03:00.0)
>
> root@dom0:/boot/grub# dmesg | grep seizing
> [    0.147445] pciback 0000:00:14.2: seizing device
> [    0.147934] pciback 0000:01:05.1: seizing device
> [    0.148070] pciback 0000:03:00.0: seizing device
>
>
> root@dom0:/boot/grub# lspci -k
> 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
>        Subsystem: Giga-byte Technology Device a022
>        Kernel driver in use: pciback
> 01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller
>        Subsystem: ATI Technologies Inc RS780 Azalia controller
>        Kernel driver in use: pciback
> 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B 
> PCI Express Gigabit Ethernet controller (rev 02)
>        Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express 
> Gigabit Ethernet controller
>        Kernel driver in use: pciback
>
>
> root@dom0:/etc/xen# grep pci /etc/xen/paradeb01.cfg
> pci = [ '00:14.2', '01:05.1', '03:00.0' ]
>
>
> In the DomU:
>
>
> root@paradeb01:~# lspci -k
> 00:00.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
>        Subsystem: Giga-byte Technology Device a022
>        Kernel driver in use: HDA Intel
> 00:01.1 Audio device: ATI Technologies Inc RS780 Azalia controller
>        Subsystem: ATI Technologies Inc RS780 Azalia controller
>        Kernel driver in use: HDA Intel
> 00:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B 
> PCI Express Gigabit Ethernet controller (rev 02)
>        Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express 
> Gigabit Ethernet controller
>        Kernel driver in use: r8169
>
>
> I see the network card with "ifconfig -a". But
> The domu sees connecting/disconnect the device:
>
>        root@paradeb01:~# [ 1059.451908] r8169: eth1: link up
>        root@paradeb01:~# dhclient eth1
>        root@paradeb01:~# echo $?
>        0
>
>
> But it fails to set an IP to the device.
>
>
>
> I see the soundcard with "alsamixer". But playing mp3 does not work. It 
> simply hangs:
>        root@paradeb01:~# mplayer -ao alsa *.mp3
>        MPlayer 1.0rc3-4.4.4 (C) 2000-2009 MPlayer Team
>        mplayer: could not connect to socket
>        mplayer: No such file or directory
>        Failed to open LIRC support. You will not be able to use your remote 
> control.
>       
>  ==========================================================================
>        Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
>        AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 16000->176400)
>        Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
>       
>  ==========================================================================
>        AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
>        Video: no video
>        Starting playback...
>        A:   0.0 (00.0) of 381.0 (06:21.0) ??,?%
>
>
> With older Debian version (pre pvops?) i did not have many problems. At first 
> the audio was glitchy, but adding it to
> "xend-pci permissive.sxp" fixed it. But now it failes to play completely.

Some general debugging steps here:
http://wiki.xensource.com/xenwiki/XenPCIpassthrough

You may want to see if you can reproduce this issue on Jeremy's git tree. See:
http://wiki.xensource.com/xenwiki/XenParavirtOps

You may also be interested in the PV audio project that a Google
Summer of Code student worked on:
http://blog.xen.org/index.php/2011/06/08/george-boutsioukis-paravirtualized-audio/

Hope that helps.

Thanks,
Todd

-- 
Todd Deshane
http://www.linkedin.com/in/deshantm
http://www.xen.org/products/cloudxen.html
http://runningxen.com/

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