On Tuesday 08 July 2014, Liviu Dudau wrote: > > Here's what these look like in /proc/iomem and /proc/ioports (note that > > there are two resource structs for each memory-mapped IO port space: one > > IORESOURCE_MEM for the memory-mapped area (used only by the host bridge > > driver), and one IORESOURCE_IO for the I/O port space (this becomes the > > parent of a region used by a regular device driver): > > > > /proc/iomem: > > PCI Bus 0000:00 I/O Ports 00000000-00000fff > > PCI Bus 0001:00 I/O Ports 01000000-01000fff > > > > /proc/ioports: > > 00000000-00000fff : PCI Bus 0000:00 > > 01000000-01000fff : PCI Bus 0001:00 > > OK, I have a question that might be ovbious to you but I have missed the answer > so far: how does the IORESOURCE_MEM area gets created? Is it the host bridge > driver's job to do it? Is it something that the framework should do when it > notices that the IORESOURCE_IO is memory mapped? The host bridge driver should either register the IORESOURCE_MEM resource itself from its probe or setup function, or it should get registered behind the covers in drivers using of_create_pci_host_bridge(). Your new pci_host_bridge_of_get_ranges already loops over all the resources, so it would be a good place to put that. 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
