On Thu, May 29, 2008 at 12:57:09PM -0600, Matthew Wilcox wrote:
> I was thinking "That seems pretty dodgy". But it seems to be what the
> driver does now in address_read_file():
>
> if (bus->self)
> retval = sprintf(buf, pci_name(bus->self));
> else
> retval = sprintf(buf, "%04x:%02x:00.0",
> pci_domain_nr(bus), bus->number);
No, I'm wrong. This is dodgy.
Basically, we need to know, given a slot, what PCI devfn a device will
have that's plugged into it. There's a hint this might be possible to
get from the OF node. Only available on ppc32, we see:
reg = of_get_property(node, "reg", NULL);
if (!reg)
return -ENODEV;
*bus = (reg[0] >> 16) & 0xff;
*devfn = ((reg[0] >> 8) & 0xff);
But this is for the OF node that's for the pci_dev, not for the OF node
that's for the slot. Is there a property on the slot's OF node that
would tell us the devfn (ok, not the 'fn' part, but YKWIM)?
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
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