PCI bus numbering and orphaned devices

[M. Warner Losh]

In message: <20030610121249.GE10527 at cicely12.cicely.de>
            Bernd Walter <ticso at cicely12.cicely.de> writes:
: On Tue, Jun 10, 2003 at 01:56:15PM +0200, Bernd Walter wrote:
: > On Mon, Jun 09, 2003 at 10:46:21PM -0600, M. Warner Losh wrote:
: > > I'm thinking that the loop should be more like:
: > > 
: > > 		pcifunchigh = 0;
: > > 		f = 0;
: > > 		hdrtype	= REG(PCIR_HEADERTYPE, 1);
: > > 		if (hdrtype & 0x7f > 2)
: > > 			continue;
: > > 		if (hdrtype & 0x80)
: > s/0x80/PCIM_MFDEV/
: > Maybe we should add a PCIM_REGLAYOUT as well.
: > 
: > > 			pcifunchigh = PCI_FUNCMAX;
: > > 		for (f = 0; f <= pcifunchigh; f++) {
: > > 			dinfo = pci_read_device(pcib, busno, s, f, dinfo_size);
: > > 			if (dinfo != NULL)
: > > 				pci_add_child(dev, dinfo);
: > > 		}
: > > 
: > > might be better code (REG likely needs to be correctly defined for
: > > this context).
: > 
: > This needs to be tested on that given hardware.
: > I don't know if REG will work as expected because it asks function 0,
: > which is disabled.
: 
: I've reread John-Mark's last mail about the readable registers.
: So - yes it should work.

That's what inspired me.  Also, I'd expected that we'd need some kind
of tweaking to make it actually compile and be neat.

Warner