PCI/ACPI: Add interface acpi_pci_root_create()

Introduce common interface acpi_pci_root_create() and related data
structures to create PCI root bus for ACPI PCI host bridges. It will
be used to kill duplicated arch specific code for IA64 and x86. It may
also help ARM64 in future.

Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index a965efa52152..89ab0572dbc6 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -52,6 +52,30 @@ static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
         return ACPI_HANDLE(dev);
 }
 
+struct acpi_pci_root;
+struct acpi_pci_root_ops;
+
+struct acpi_pci_root_info {
+        struct acpi_pci_root            *root;
+        struct acpi_device              *bridge;
+        struct acpi_pci_root_ops        *ops;
+        struct list_head                resources;
+        char                            name[16];
+};
+
+struct acpi_pci_root_ops {
+        struct pci_ops *pci_ops;
+        int (*init_info)(struct acpi_pci_root_info *info);
+        void (*release_info)(struct acpi_pci_root_info *info);
+        int (*prepare_resources)(struct acpi_pci_root_info *info);
+};
+
+extern int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info);
+extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
+                                            struct acpi_pci_root_ops *ops,
+                                            struct acpi_pci_root_info *info,
+                                            void *sd);
+
 void acpi_pci_add_bus(struct pci_bus *bus);
 void acpi_pci_remove_bus(struct pci_bus *bus);