Merge tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
[linux-3.10.git] / drivers / acpi / pci_root.c
index b3cc69c..0ac546d 100644 (file)
@@ -103,24 +103,6 @@ void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
 }
 EXPORT_SYMBOL(acpi_pci_unregister_driver);
 
-acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus)
-{
-       struct acpi_pci_root *root;
-       acpi_handle handle = NULL;
-       
-       mutex_lock(&acpi_pci_root_lock);
-       list_for_each_entry(root, &acpi_pci_roots, node)
-               if ((root->segment == (u16) seg) &&
-                   (root->secondary.start == (u16) bus)) {
-                       handle = root->device->handle;
-                       break;
-               }
-       mutex_unlock(&acpi_pci_root_lock);
-       return handle;
-}
-
-EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle);
-
 /**
  * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge
  * @handle - the ACPI CA node in question.
@@ -431,7 +413,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
        acpi_status status;
        int result;
        struct acpi_pci_root *root;
-       acpi_handle handle;
        struct acpi_pci_driver *driver;
        u32 flags, base_flags;
        bool is_osc_granted = false;
@@ -486,16 +467,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
               acpi_device_name(device), acpi_device_bid(device),
               root->segment, &root->secondary);
 
-       /*
-        * PCI Routing Table
-        * -----------------
-        * Evaluate and parse _PRT, if exists.
-        */
-       status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
-       if (ACPI_SUCCESS(status))
-               result = acpi_pci_irq_add_prt(device->handle, root->segment,
-                                             root->secondary.start);
-
        root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
 
        /*
@@ -597,8 +568,10 @@ static int acpi_pci_root_add(struct acpi_device *device,
        if (device->wakeup.flags.run_wake)
                device_set_run_wake(root->bus->bridge, true);
 
-       if (system_state != SYSTEM_BOOTING)
+       if (system_state != SYSTEM_BOOTING) {
+               pcibios_resource_survey_bus(root->bus);
                pci_assign_unassigned_bus_resources(root->bus);
+       }
 
        mutex_lock(&acpi_pci_root_lock);
        list_for_each_entry(driver, &acpi_pci_drivers, node)
@@ -618,7 +591,6 @@ out_del_root:
        list_del(&root->node);
        mutex_unlock(&acpi_pci_root_lock);
 
-       acpi_pci_irq_del_prt(root->segment, root->secondary.start);
 end:
        kfree(root);
        return result;
@@ -626,8 +598,6 @@ end:
 
 static void acpi_pci_root_remove(struct acpi_device *device)
 {
-       acpi_status status;
-       acpi_handle handle;
        struct acpi_pci_root *root = acpi_driver_data(device);
        struct acpi_pci_driver *driver;
 
@@ -642,10 +612,6 @@ static void acpi_pci_root_remove(struct acpi_device *device)
        device_set_run_wake(root->bus->bridge, false);
        pci_acpi_remove_bus_pm_notifier(device);
 
-       status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
-       if (ACPI_SUCCESS(status))
-               acpi_pci_irq_del_prt(root->segment, root->secondary.start);
-
        pci_remove_root_bus(root->bus);
 
        mutex_lock(&acpi_pci_root_lock);
@@ -663,3 +629,133 @@ void __init acpi_pci_root_init(void)
                acpi_scan_add_handler(&pci_root_handler);
        }
 }
+/* Support root bridge hotplug */
+
+static void handle_root_bridge_insertion(acpi_handle handle)
+{
+       struct acpi_device *device;
+
+       if (!acpi_bus_get_device(handle, &device)) {
+               printk(KERN_DEBUG "acpi device exists...\n");
+               return;
+       }
+
+       if (acpi_bus_scan(handle))
+               printk(KERN_ERR "cannot add bridge to acpi list\n");
+}
+
+static void handle_root_bridge_removal(struct acpi_device *device)
+{
+       struct acpi_eject_event *ej_event;
+
+       ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
+       if (!ej_event) {
+               /* Inform firmware the hot-remove operation has error */
+               (void) acpi_evaluate_hotplug_ost(device->handle,
+                                       ACPI_NOTIFY_EJECT_REQUEST,
+                                       ACPI_OST_SC_NON_SPECIFIC_FAILURE,
+                                       NULL);
+               return;
+       }
+
+       ej_event->device = device;
+       ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
+
+       acpi_bus_hot_remove_device(ej_event);
+}
+
+static void _handle_hotplug_event_root(struct work_struct *work)
+{
+       struct acpi_pci_root *root;
+       struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER };
+       struct acpi_hp_work *hp_work;
+       acpi_handle handle;
+       u32 type;
+
+       hp_work = container_of(work, struct acpi_hp_work, work);
+       handle = hp_work->handle;
+       type = hp_work->type;
+
+       root = acpi_pci_find_root(handle);
+
+       acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+
+       switch (type) {
+       case ACPI_NOTIFY_BUS_CHECK:
+               /* bus enumerate */
+               printk(KERN_DEBUG "%s: Bus check notify on %s\n", __func__,
+                                (char *)buffer.pointer);
+               if (!root)
+                       handle_root_bridge_insertion(handle);
+
+               break;
+
+       case ACPI_NOTIFY_DEVICE_CHECK:
+               /* device check */
+               printk(KERN_DEBUG "%s: Device check notify on %s\n", __func__,
+                                (char *)buffer.pointer);
+               if (!root)
+                       handle_root_bridge_insertion(handle);
+               break;
+
+       case ACPI_NOTIFY_EJECT_REQUEST:
+               /* request device eject */
+               printk(KERN_DEBUG "%s: Device eject notify on %s\n", __func__,
+                                (char *)buffer.pointer);
+               if (root)
+                       handle_root_bridge_removal(root->device);
+               break;
+       default:
+               printk(KERN_WARNING "notify_handler: unknown event type 0x%x for %s\n",
+                                type, (char *)buffer.pointer);
+               break;
+       }
+
+       kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
+       kfree(buffer.pointer);
+}
+
+static void handle_hotplug_event_root(acpi_handle handle, u32 type,
+                                       void *context)
+{
+       alloc_acpi_hp_work(handle, type, context,
+                               _handle_hotplug_event_root);
+}
+
+static acpi_status __init
+find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+       acpi_status status;
+       char objname[64];
+       struct acpi_buffer buffer = { .length = sizeof(objname),
+                                     .pointer = objname };
+       int *count = (int *)context;
+
+       if (!acpi_is_root_bridge(handle))
+               return AE_OK;
+
+       (*count)++;
+
+       acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+
+       status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+                                       handle_hotplug_event_root, NULL);
+       if (ACPI_FAILURE(status))
+               printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n",
+                                 objname, (unsigned int)status);
+       else
+               printk(KERN_DEBUG "acpi root: %s notify handler is installed\n",
+                                objname);
+
+       return AE_OK;
+}
+
+void __init acpi_pci_root_hp_init(void)
+{
+       int num = 0;
+
+       acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+               ACPI_UINT32_MAX, find_root_bridges, NULL, &num, NULL);
+
+       printk(KERN_DEBUG "Found %d acpi root devices\n", num);
+}