On Thursday 27 February 2014 14:21:03 Liviu Dudau wrote: > On Thu, Feb 27, 2014 at 02:08:44PM +0000, Arnd Bergmann wrote: > > I think using pci_address_to_pio() at that point is just wrong > > in either way. Before the host is fully registered, you can't actually > > look up the port number -- you are only trying to assign one at this time. > > > > The implementation that Will wrote for ARM would work here: find the > > next available virtual I/O range, call pci_ioremap_io on range->pci_addr > > and then return the virtual address. Unfortunately that code is not > > architecture independent at this time, and we will first have to come > > up with something that can be made to work for powerpc, microblaze, > > mips and arm. > > No, no, no... we cannot use the virtual address as the start of the resource > as this will later be used when doing pcibios_resource_to_bus(). My mistake: I meant to say return the offset into the virtual window, i.e. what IORESOURCE_IO space is about. > What we need here is a portable way of converting from PCI range that uses physical > CPU addresses to a IORESOURCE_IO type resource that uses logical IO > addresses. Using logical IO values works, as Bjorn's code treats it as > physical address. Right. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
