Jun Sun wrote:
>
> Has anybody succssfully used pci_assign_unassigned_resources() in latest 2.4?
> It was badly broken in early 2.4 kernels while pci_auto was the only
> option.
In fact, I have used pci_assign_unassigned_resources() from early 2.4
days. The only code I had to supply was
fixup of PCI-PCI bridge spaces which was done in pcibios_fixup_bus,
something like
if(!bus->self) /* Primary busses */
bus->resource[0] = &ioport_resource;
bus->resource[1] = &iomem_resource;
else /* busses behind PCI-PCI bridges */
for IO, MEM, and PREFETCH spaces:
bus->resource[i] =
&bus->self->resource[PCI_BRIDGE_RESOURCES+i];
bus->resource[i]->start =
bus->parent->resource[i]->start;
bus->resource[i]->end = bus->parent->resource[i]->end;
bus->resource[i]->flags =
bus->parent->resource[i]->flags;
bus->resource[i]->name = bus->name;
Ah, I had to disable ISA mapping in 2.4.25.
After that, pci_assign_unassigned_resources() assigns all resources
properly. If for some reason, you have to preserve PBAR's values
assigned by a BIOS, setup pci_dev.resource[].parent before invoking
pci_assign_unassigned_resources.
>
> So at most you can only say "pci_assign_unassigned_resources() can
> finally does what pci_auto does". :)
Exactly.
Regards,
Gleb.
