Hi Yijing, On Wed, Jan 21, 2015 at 12:29:55AM +0000, Yijing Wang wrote: > v1->v2: > Split pci_host_bridge_list into a new patch, remove .phb_probe_mode > and rework powerpc .phb_of_scan_bus() for simpilicty suggested by > Arnd. Refresh some patch description log, and add a new patch to fix > build warning in ia64. > > This series is based on Bjorn's pci-next branch. > > Patch 1-4 ripped out pci_bus_add_devices() from pci scan interfaces > for better pci scan flow. > > Patch 5-11 make a generic pci_host_bridge to hold pci_host_bridge > related informations, and introduce a pci_host_bridge_ops to > support platform host drivers provide its own pci_host_bridge > related operations to setup pci_host_bridge during pci enumeration. > > Patch 12-28 apply the new pci scan interfaces to platform pci host > bridge drivers. > > Now in kernel, we scan pci bus use the following ways: > 1. pci_scan_bus. > parent = NULL, default io/mem/bus resources > call pci_bus_add_devices() > > 2. pci_scan_bus_parented() + pci_bus_add_devices() > default io/mem/bus resources, only used by xen > > 3. pci_scan_root_bus() + pci_bus_add_devices() > > 4. pci_create_root_bus() + pci_scan_child_bus() + pci_bus_add_devices() > > 5. pci_create_root_bus() + xx_of_scan_bus() + pci_bus_add_devices() > > And we have a lot of arch specific pci_domain_nr() and other platform > specific weak function like pcibios_root_bridge_prepare(). > > After applied this series, we have following scan interfaces: > > 1. pci_scan_bus_legacy() > parent = NULL, default io/mem/bus resources. > for legacy pci scan > > 2. pci_scan_root_bus() > for callers provide its own parent and io/mem/bus resources > but no platform specific pci_host_bridge operations > > 3. pci_scan_root_bridge() > for callers provide its own parent and io/mem/bus resources > and pci_host_bridge_ops. > > Besides, above pci scan interfaces all need addtionally call pci_bus_add_devices() > to set match_driver true and try to attach drivers. > > Also we could eliminate all arch specific pci_domain_nr() after applied this series. > > I tested this series on x86 (with or without ACPI). > Comments and tests are warmly welcome! Can you push a public branch out rebased against mainline for us to pull and test please ? Thanks ! Lorenzo -- 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
