Re: Help: DGE-560T not recognized by Linux

[Sergey Vlasov]

On Sat, 18 Feb 2006 10:01:26 -0700 Brian Hall wrote:

> On Fri, 17 Feb 2006 23:48:41 -0800
> Andrew Morton <akpm@xxxxxxxx> wrote:
> > Brian Hall <brihall@xxxxxxxxxx> wrote:
> > >  I see that the sky2 driver in 2.6.16rc4 lists my card, but for some
> > >  reason it fails to access the card, maybe because I have an ULi
> > > chipset?
> > > 
> > >  Feb 17 23:18:46 syrinx sky2 0000:02:00.0: can't access PCI config
> > > space
> > 
> > Looks like something died way down in the PCI bus config space
> > read/write operations.  I don't know what would cause that.  You
> > could perhaps play with `pci=conf1', `pci=conf2', etc as per
> > Documentation/kernel-parameters.txt.
> 
> OK, I tried all these pci= options, plus acpi=off, to no effect:
> conf1, conf2, nommconf, biosirq, noacpi, routeirq, nosort, rom,
> lastbus=2, assign-busses, usepirqmask acpi=off
> 
> Also tried adjusting PCIe-related stuff in the BIOS (underclocking PCIe
> from 100 to 70 and adjusting Northbridge options). No change.

Most likely it fails here:

		err = pci_write_config_dword(hw->pdev, PEX_UNC_ERR_STAT,
						 0xffffffffUL);
		if (err)
			goto pci_err;

PEX_UNC_ERR_STAT is 0x104; this register is outside of the standard
256-byte PCI configuration space, and is reachable only via the MMCONFIG
access mechanism.  Seems that kernel is not using MMCONFIG for some
reason; you mentioned that you have CONFIG_PCI_MMCONFIG=y in kernel
config, so it looks like your BIOS does not provide proper MCFG table.
Full dmesg output might give some clues.

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