[Xen-users] Problem with mISDN and HFC-Cards in Asterisk-DomU

[Dennis Petschull <dennis.petschull@xxxxxx>]

Hello,

I am having problems, getting my asterisk-domU to work properly. It consists 
of the following components:

- Debian Etch under Xen-3.1 with a 2.6.18-kernel
- Asterisk 1.2.24
- mISDN-1.1.5

I have 2 HFC-ISDN-cards, which I pass through to the Asterisk-DomU in 
permissive mode. This is working fine.
The strange problem is, that the two HFC-ISDN-cards are not beeing initialized 
by the mISDN-driver if there are more than 3 other domUs up and running.

I get the following error message:
HFC-PCI: Error allocating memory for FIFO!
FATAL: Error inserting hfcpci (/lib/modules/2.6.18-xenU/extra/hfcpci.ko): No 
such device

If you look into the mISDN source-code you will find the following snippet of 
code in /drivers/isdn/hardware/mISDN/hfc_pci.c, which produces the above 
error:

        /* Allocate memory for FIFOS */
        /* the memory needs to be on a 32k boundary within the first 4G */
        pci_set_dma_mask(dev_hfcpci, 0xFFFF8000);
        buffer = pci_alloc_consistent(dev_hfcpci, 0x8000, &hc->hw.dmahandle);
        /* We silently assume the address is okay if nonzero */
        if(!buffer) {
                printk(KERN_WARNING "HFC-PCI: Error allocating memory for 
FIFO!\n");
                return 1;
        }


But what is even more strange is the following: 
As far as I can see, mISDN will also not initialize the HFC-cards in the 
asterisk domU if I have not started all the other domUs at least once. Than I 
have to shut down one of the other domUs, initialize the mISDN drivers, and 
restart the other domU again.

Just in case it might help to solve the problem, I will post the output of 
lspci -vv in the case where mISDN CAN initialize the cards and in the case 
where it CANNOT. Here it comes:

mISDN CAN initialize the cards:

asterisk:~# lspci -vv
01:07.0 Network controller: Cologne Chip Designs GmbH ISDN network controller 
[HFC-PCI] (rev 02)
        Subsystem: Cologne Chip Designs GmbH ISDN Board
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 16 (4000ns max)
        Interrupt: pin A routed to IRQ 19
        Region 0: I/O ports at a400 [disabled] [size=8]
        Region 1: Memory at f4004000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [40] Power Management version 1
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME+

01:08.0 Network controller: Cologne Chip Designs GmbH ISDN network controller 
[HFC-PCI] (rev 02)
        Subsystem: Cologne Chip Designs GmbH ISDN Board
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 16 (4000ns max)
        Interrupt: pin A routed to IRQ 18
        Region 0: I/O ports at a800 [disabled] [size=8]
        Region 1: Memory at f4005000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [40] Power Management version 1
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME+


mISDN CANNOT initialize the cards:

asterisk:~# lspci -vv
01:07.0 Network controller: Cologne Chip Designs GmbH ISDN network controller 
[HFC-PCI] (rev 02)
        Subsystem: Cologne Chip Designs GmbH ISDN Board
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 16 (4000ns max)
        Interrupt: pin A routed to IRQ 19
        Region 0: I/O ports at a400 [size=8]
        Region 1: Memory at f4004000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [40] Power Management version 1
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME+

01:08.0 Network controller: Cologne Chip Designs GmbH ISDN network controller 
[HFC-PCI] (rev 02)
        Subsystem: Cologne Chip Designs GmbH ISDN Board
        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin A routed to IRQ 18
        Region 0: I/O ports at a800 [disabled] [size=8]
        Region 1: Memory at f4005000 (32-bit, non-prefetchable) [disabled] 
[size=256]
        Capabilities: [40] Power Management version 1
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME+


Has anyone ever encountered such a strange problem? Does anyone know how to 
solve this problem?

Thanks!

Greetings,
Dennis

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