Re: [Xen-users] Re: Problem with Tigon3 network card in Dom0

[Angel de Vicente <angelv@xxxxxx>]

Hi,

> > The network card in this machine is (as reported by dmesg when booted with
> > standard Ubuntu install):
> > 
> > [   59.434219] tg3.c:v3.59.1 (August 25, 2006)
> > [   59.434235] ACPI: PCI Interrupt 0000:05:00.0[A] -> GSI 17 (level, low)
> > [   -> IRQ 177 59.434243] PCI: Setting latency timer of device
> > [   0000:05:00.0 to 64 59.459777] eth0: Tigon3 [partno(BCM95754) rev b002
> > [   PHY(5787)] (PCI Express) 10/100/1000BaseT Ethernet 00:13:72:34:30:d1
> > [   59.459782] eth0: RXcsums[1] LinkChgREG[1] MIirq[1] ASF[0] Split[0]
> > [   WireSpeed[1] TSOcap[1] 59.459785] eth0: dma_rwctrl[76180000]
> > [   dma_mask[64-bit]
> > 
> > 
> > But when I try to boot with the Xen kernel, there is no message about the
> > card in dmesg and it just seems that it has vanished...
> 
> Well, Ubuntu 6.10 comes with a 2.6.17 kernel that has support for your
> Broadcom NIC. But XENs 2.6.16 doesn't have (it has support for Broadcom tg3
> NICs of course, but not for your specific modell). The simplest way is to
> download Broadcoms open source drivers and compile them for your XEN
> kernel. 
> I have the same problem here and it isn't a big thing to do...

Yes, thanks a lot, it was that... I had read somewhere that Broadcom NICs were
supported in the kernel 2.6.16 and I assumed that it had to be something with my
configuration, but just changing from 2.6.17 to 2.6.16 and having this specific
model was a rare coincidence...

In case someone finds a similar problem, I include below the changes that I had
to do to a couple of files in the xen kernel sources to allow compilation.

Basically I just copied the files tg3.c and tg3.h provided by Broadcom
(http://www.broadcom.com/support/ethernet_nic/netxtreme_desktop.php) to
xen-3.0.4_1-src/linux-2.6.16.33-xen/drivers/net

and then did these changes 

in tg3.h:
---------

332c332
< /*static inline void netif_tx_lock(struct net_device *dev)
---
> static inline void netif_tx_lock(struct net_device *dev)
336c336
< }*/
---
> }
338c338
< /*static inline void netif_tx_unlock(struct net_device *dev)
---
> static inline void netif_tx_unlock(struct net_device *dev)
342c342
< }*/
---
> }


in the file include/linux/skbuff.h added the line for SKB_GSO_TCPV6:
--------------------
        SKB_GSO_UDPV4 = 1 << 1,

        /* This indicates the skb is from an untrusted source. */
        SKB_GSO_DODGY = 1 << 2,

        SKB_GSO_TCPV6 = 1 << 4,
};

/** 
 *      struct sk_buff - socket buffer
 *      @next: Next buffer in list


Then recompile, and presto, I can boot to Dom0 without (apparent) problems.

Cheers,
Angel de Vicente
-- 
----------------------------------
http://www.iac.es/galeria/angelv/

PostDoc Software Support
Instituto de Astrofísica de Canarias

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