+ pci_bus = pci_find_bus(seg, bus);
+ if (!pci_bus) {
+ err("Can't find bus %04x:%02x\n", seg, bus);
+ return 0;
+ }
+
+ /* check if this bridge has ejectable slots */
+ if (detect_ejectable_slots(handle) > 0) {
+ dbg("found PCI host-bus bridge with hot-pluggable slots\n");
+ add_host_bridge(handle, pci_bus);
+ }
+
+ /* search P2P bridges under this host bridge */
+ status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
+ find_p2p_bridge, pci_bus, NULL);
+
+ if (ACPI_FAILURE(status))
+ warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
+
+ return 0;
+}
+
+static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
+{
+ struct list_head *head;
+ list_for_each(head, &bridge_list) {
+ struct acpiphp_bridge *bridge = list_entry(head,
+ struct acpiphp_bridge, list);
+ if (bridge->handle == handle)
+ return bridge;
+ }
+
+ return NULL;
+}
+
+static void cleanup_bridge(struct acpiphp_bridge *bridge)
+{
+ struct list_head *list, *tmp;
+ struct acpiphp_slot *slot;
+ acpi_status status;
+ acpi_handle handle = bridge->handle;
+
+ status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+ handle_hotplug_event_bridge);
+ if (ACPI_FAILURE(status))
+ err("failed to remove notify handler\n");
+
+ if ((bridge->type != BRIDGE_TYPE_HOST) &&
+ ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) {
+ status = acpi_install_notify_handler(bridge->func->handle,
+ ACPI_SYSTEM_NOTIFY,
+ handle_hotplug_event_func,
+ bridge->func);
+ if (ACPI_FAILURE(status))
+ err("failed to install interrupt notify handler\n");
+ }
+
+ slot = bridge->slots;
+ while (slot) {
+ struct acpiphp_slot *next = slot->next;
+ list_for_each_safe (list, tmp, &slot->funcs) {
+ struct acpiphp_func *func;
+ func = list_entry(list, struct acpiphp_func, sibling);
+ if (is_dock_device(func->handle)) {
+ unregister_hotplug_dock_device(func->handle);
+ unregister_dock_notifier(&func->nb);
+ }
+ if (!(func->flags & FUNC_HAS_DCK)) {
+ status = acpi_remove_notify_handler(func->handle,
+ ACPI_SYSTEM_NOTIFY,
+ handle_hotplug_event_func);
+ if (ACPI_FAILURE(status))
+ err("failed to remove notify handler\n");
+ }
+ pci_dev_put(func->pci_dev);
+ list_del(list);
+ kfree(func);
+ }
+ acpiphp_unregister_hotplug_slot(slot);
+ list_del(&slot->funcs);
+ kfree(slot);
+ slot = next;
+ }
+
+ pci_dev_put(bridge->pci_dev);
+ list_del(&bridge->list);
+ kfree(bridge);
+}
+
+static acpi_status
+cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+ struct acpiphp_bridge *bridge;
+
+ /* cleanup p2p bridges under this P2P bridge
+ in a depth-first manner */
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
+ cleanup_p2p_bridge, NULL, NULL);
+
+ if (!(bridge = acpiphp_handle_to_bridge(handle)))
+ return AE_OK;
+ cleanup_bridge(bridge);
+ return AE_OK;
+}
+
+static void remove_bridge(acpi_handle handle)
+{
+ struct acpiphp_bridge *bridge;
+
+ /* cleanup p2p bridges under this host bridge
+ in a depth-first manner */
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
+ (u32)1, cleanup_p2p_bridge, NULL, NULL);
+
+ bridge = acpiphp_handle_to_bridge(handle);
+ if (bridge)
+ cleanup_bridge(bridge);
+}
+
+static struct pci_dev * get_apic_pci_info(acpi_handle handle)
+{
+ struct acpi_pci_id id;
+ struct pci_bus *bus;
+ struct pci_dev *dev;
+
+ if (ACPI_FAILURE(acpi_get_pci_id(handle, &id)))
+ return NULL;
+
+ bus = pci_find_bus(id.segment, id.bus);
+ if (!bus)
+ return NULL;
+
+ dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function));
+ if (!dev)
+ return NULL;
+
+ if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) &&
+ (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC))
+ {
+ pci_dev_put(dev);
+ return NULL;
+ }
+
+ return dev;
+}
+
+static int get_gsi_base(acpi_handle handle, u32 *gsi_base)
+{
+ acpi_status status;
+ int result = -1;
+ unsigned long gsb;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *obj;
+ void *table;
+
+ status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb);
+ if (ACPI_SUCCESS(status)) {
+ *gsi_base = (u32)gsb;
+ return 0;
+ }
+
+ status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer);
+ if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer)
+ return -1;
+
+ obj = buffer.pointer;
+ if (obj->type != ACPI_TYPE_BUFFER)
+ goto out;
+
+ table = obj->buffer.pointer;
+ switch (((acpi_table_entry_header *)table)->type) {
+ case ACPI_MADT_IOSAPIC:
+ *gsi_base = ((struct acpi_table_iosapic *)table)->global_irq_base;
+ result = 0;
+ break;
+ case ACPI_MADT_IOAPIC:
+ *gsi_base = ((struct acpi_table_ioapic *)table)->global_irq_base;
+ result = 0;
+ break;
+ default:
+ break;
+ }
+ out:
+ kfree(buffer.pointer);
+ return result;
+}
+
+static acpi_status
+ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+ acpi_status status;
+ unsigned long sta;
+ acpi_handle tmp;
+ struct pci_dev *pdev;
+ u32 gsi_base;
+ u64 phys_addr;
+ struct acpiphp_ioapic *ioapic;
+
+ /* Evaluate _STA if present */
+ status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+ if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL)
+ return AE_CTRL_DEPTH;
+
+ /* Scan only PCI bus scope */
+ status = acpi_get_handle(handle, "_HID", &tmp);
+ if (ACPI_SUCCESS(status))
+ return AE_CTRL_DEPTH;
+
+ if (get_gsi_base(handle, &gsi_base))
+ return AE_OK;
+
+ ioapic = kmalloc(sizeof(*ioapic), GFP_KERNEL);
+ if (!ioapic)
+ return AE_NO_MEMORY;
+
+ pdev = get_apic_pci_info(handle);
+ if (!pdev)
+ goto exit_kfree;
+
+ if (pci_enable_device(pdev))
+ goto exit_pci_dev_put;
+
+ pci_set_master(pdev);
+
+ if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)"))
+ goto exit_pci_disable_device;
+
+ phys_addr = pci_resource_start(pdev, 0);
+ if (acpi_register_ioapic(handle, phys_addr, gsi_base))
+ goto exit_pci_release_region;
+
+ ioapic->gsi_base = gsi_base;
+ ioapic->dev = pdev;
+ spin_lock(&ioapic_list_lock);
+ list_add_tail(&ioapic->list, &ioapic_list);
+ spin_unlock(&ioapic_list_lock);
+
+ return AE_OK;
+
+ exit_pci_release_region:
+ pci_release_region(pdev, 0);
+ exit_pci_disable_device:
+ pci_disable_device(pdev);
+ exit_pci_dev_put:
+ pci_dev_put(pdev);
+ exit_kfree:
+ kfree(ioapic);
+
+ return AE_OK;
+}
+
+static acpi_status
+ioapic_remove(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+ acpi_status status;
+ unsigned long sta;
+ acpi_handle tmp;
+ u32 gsi_base;
+ struct acpiphp_ioapic *pos, *n, *ioapic = NULL;
+
+ /* Evaluate _STA if present */
+ status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+ if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL)
+ return AE_CTRL_DEPTH;
+
+ /* Scan only PCI bus scope */
+ status = acpi_get_handle(handle, "_HID", &tmp);
+ if (ACPI_SUCCESS(status))
+ return AE_CTRL_DEPTH;
+
+ if (get_gsi_base(handle, &gsi_base))
+ return AE_OK;
+
+ acpi_unregister_ioapic(handle, gsi_base);
+
+ spin_lock(&ioapic_list_lock);
+ list_for_each_entry_safe(pos, n, &ioapic_list, list) {
+ if (pos->gsi_base != gsi_base)
+ continue;
+ ioapic = pos;
+ list_del(&ioapic->list);
+ break;