diff options
Diffstat (limited to 'drivers/acpi/pci_root.c')
| -rw-r--r-- | drivers/acpi/pci_root.c | 170 |
1 files changed, 133 insertions, 37 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index b3cc69c..0ac546d 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -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); +} |
