PCI: Set MPS to match upstream bridge

[mirror_ubuntu-zesty-kernel.git] / include / linux / pci.h

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8a0321a8fb595892c5e80910d5c914c89ded63de..0007942923a7b20611afe88e3fa646b70d0788e3 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -738,10 +738,11 @@ struct pci_driver {
 void pcie_bus_configure_settings(struct pci_bus *bus);
 
 enum pcie_bus_config_types {
-       PCIE_BUS_TUNE_OFF,
-       PCIE_BUS_SAFE,
-       PCIE_BUS_PERFORMANCE,
-       PCIE_BUS_PEER2PEER,
+       PCIE_BUS_TUNE_OFF,      /* don't touch MPS at all */
+       PCIE_BUS_DEFAULT,       /* ensure MPS matches upstream bridge */
+       PCIE_BUS_SAFE,          /* use largest MPS boot-time devices support */
+       PCIE_BUS_PERFORMANCE,   /* use MPS and MRRS for best performance */
+       PCIE_BUS_PEER2PEER,     /* set MPS = 128 for all devices */
 };
 
 extern enum pcie_bus_config_types pcie_bus_config;
@@ -787,6 +788,10 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
 void pci_bus_release_busn_res(struct pci_bus *b);
+struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus,
+                                     struct pci_ops *ops, void *sysdata,
+                                     struct list_head *resources,
+                                     struct msi_controller *msi);
 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
                                             struct pci_ops *ops, void *sysdata,
                                             struct list_head *resources);