diff options
| -rw-r--r-- | drivers/acpi/glue.c | 135 | ||||
| -rw-r--r-- | drivers/acpi/proc.c | 57 | ||||
| -rw-r--r-- | drivers/acpi/scan.c | 2 | ||||
| -rw-r--r-- | drivers/pnp/pnpacpi/core.c | 7 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 15 |
5 files changed, 139 insertions, 77 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index 243ee85e4d2e..d1a2d74033e9 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -25,6 +25,8 @@ static LIST_HEAD(bus_type_list); static DECLARE_RWSEM(bus_type_sem); +#define PHYSICAL_NODE_STRING "physical_node" + int register_acpi_bus_type(struct acpi_bus_type *type) { if (acpi_disabled) @@ -124,84 +126,119 @@ acpi_handle acpi_get_child(acpi_handle parent, u64 address) EXPORT_SYMBOL(acpi_get_child); -/* Link ACPI devices with physical devices */ -static void acpi_glue_data_handler(acpi_handle handle, - void *context) -{ - /* we provide an empty handler */ -} - -/* Note: a success call will increase reference count by one */ -struct device *acpi_get_physical_device(acpi_handle handle) -{ - acpi_status status; - struct device *dev; - - status = acpi_get_data(handle, acpi_glue_data_handler, (void **)&dev); - if (ACPI_SUCCESS(status)) - return get_device(dev); - return NULL; -} - -EXPORT_SYMBOL(acpi_get_physical_device); - static int acpi_bind_one(struct device *dev, acpi_handle handle) { struct acpi_device *acpi_dev; acpi_status status; + struct acpi_device_physical_node *physical_node; + char physical_node_name[sizeof(PHYSICAL_NODE_STRING) + 2]; + int retval = -EINVAL; if (dev->archdata.acpi_handle) { dev_warn(dev, "Drivers changed 'acpi_handle'\n"); return -EINVAL; } + get_device(dev); - status = acpi_attach_data(handle, acpi_glue_data_handler, dev); - if (ACPI_FAILURE(status)) { - put_device(dev); - return -EINVAL; + status = acpi_bus_get_device(handle, &acpi_dev); + if (ACPI_FAILURE(status)) + goto err; + + physical_node = kzalloc(sizeof(struct acpi_device_physical_node), + GFP_KERNEL); + if (!physical_node) { + retval = -ENOMEM; + goto err; } - dev->archdata.acpi_handle = handle; - status = acpi_bus_get_device(handle, &acpi_dev); - if (!ACPI_FAILURE(status)) { - int ret; - - ret = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj, - "firmware_node"); - ret = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj, - "physical_node"); - if (acpi_dev->wakeup.flags.valid) - device_set_wakeup_capable(dev, true); + mutex_lock(&acpi_dev->physical_node_lock); + /* allocate physical node id according to physical_node_id_bitmap */ + physical_node->node_id = + find_first_zero_bit(acpi_dev->physical_node_id_bitmap, + ACPI_MAX_PHYSICAL_NODE); + if (physical_node->node_id >= ACPI_MAX_PHYSICAL_NODE) { + retval = -ENOSPC; + mutex_unlock(&acpi_dev->physical_node_lock); + goto err; } + set_bit(physical_node->node_id, acpi_dev->physical_node_id_bitmap); + physical_node->dev = dev; + list_add_tail(&physical_node->node, &acpi_dev->physical_node_list); + acpi_dev->physical_node_count++; + mutex_unlock(&acpi_dev->physical_node_lock); + + dev->archdata.acpi_handle = handle; + + if (!physical_node->node_id) + strcpy(physical_node_name, PHYSICAL_NODE_STRING); + else + sprintf(physical_node_name, + "physical_node%d", physical_node->node_id); + retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj, + physical_node_name); + retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj, + "firmware_node"); + + if (acpi_dev->wakeup.flags.valid) + device_set_wakeup_capable(dev, true); + return 0; + + err: + put_device(dev); + return retval; } static int acpi_unbind_one(struct device *dev) { + struct acpi_device_physical_node *entry; + struct acpi_device *acpi_dev; + acpi_status status; + struct list_head *node, *next; + if (!dev->archdata.acpi_handle) return 0; - if (dev == acpi_get_physical_device(dev->archdata.acpi_handle)) { - struct acpi_device *acpi_dev; - /* acpi_get_physical_device increase refcnt by one */ - put_device(dev); + status = acpi_bus_get_device(dev->archdata.acpi_handle, + &acpi_dev); + if (ACPI_FAILURE(status)) + goto err; - if (!acpi_bus_get_device(dev->archdata.acpi_handle, - &acpi_dev)) { - sysfs_remove_link(&dev->kobj, "firmware_node"); - sysfs_remove_link(&acpi_dev->dev.kobj, "physical_node"); - } + mutex_lock(&acpi_dev->physical_node_lock); + list_for_each_safe(node, next, &acpi_dev->physical_node_list) { + char physical_node_name[sizeof(PHYSICAL_NODE_STRING) + 2]; + + entry = list_entry(node, struct acpi_device_physical_node, + node); + if (entry->dev != dev) + continue; + + list_del(node); + clear_bit(entry->node_id, acpi_dev->physical_node_id_bitmap); - acpi_detach_data(dev->archdata.acpi_handle, - acpi_glue_data_handler); + acpi_dev->physical_node_count--; + + if (!entry->node_id) + strcpy(physical_node_name, PHYSICAL_NODE_STRING); + else + sprintf(physical_node_name, + "physical_node%d", entry->node_id); + + sysfs_remove_link(&acpi_dev->dev.kobj, physical_node_name); + sysfs_remove_link(&dev->kobj, "firmware_node"); dev->archdata.acpi_handle = NULL; /* acpi_bind_one increase refcnt by one */ put_device(dev); - } else { - dev_err(dev, "Oops, 'acpi_handle' corrupt\n"); + kfree(entry); } + mutex_unlock(&acpi_dev->physical_node_lock); + return 0; + +err: + dev_err(dev, "Oops, 'acpi_handle' corrupt\n"); + return -EINVAL; } static int acpi_platform_notify(struct device *dev) diff --git a/drivers/acpi/proc.c b/drivers/acpi/proc.c index 251c7b6273a9..27adb090bb30 100644 --- a/drivers/acpi/proc.c +++ b/drivers/acpi/proc.c @@ -302,26 +302,41 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) list_for_each_safe(node, next, &acpi_wakeup_device_list) { struct acpi_device *dev = container_of(node, struct acpi_device, wakeup_list); - struct device *ldev; + struct acpi_device_physical_node *entry; if (!dev->wakeup.flags.valid) continue; - ldev = acpi_get_physical_device(dev->handle); - seq_printf(seq, "%s\t S%d\t%c%-8s ", + seq_printf(seq, "%s\t S%d\t", dev->pnp.bus_id, - (u32) dev->wakeup.sleep_state, - dev->wakeup.flags.run_wake ? '*' : ' ', - (device_may_wakeup(&dev->dev) - || (ldev && device_may_wakeup(ldev))) ? - "enabled" : "disabled"); - if (ldev) - seq_printf(seq, "%s:%s", - ldev->bus ? ldev->bus->name : "no-bus", - dev_name(ldev)); - seq_printf(seq, "\n"); - put_device(ldev); - + (u32) dev->wakeup.sleep_state); + + if (!dev->physical_node_count) + seq_printf(seq, "%c%-8s\n", + dev->wakeup.flags.run_wake ? + '*' : ' ', "disabled"); + else { + struct device *ldev; + list_for_each_entry(entry, &dev->physical_node_list, + node) { + ldev = get_device(entry->dev); + if (!ldev) + continue; + + if (&entry->node != + dev->physical_node_list.next) + seq_printf(seq, "\t\t"); + + seq_printf(seq, "%c%-8s %s:%s\n", + dev->wakeup.flags.run_wake ? '*' : ' ', + (device_may_wakeup(&dev->dev) || + (ldev && device_may_wakeup(ldev))) ? + "enabled" : "disabled", + ldev->bus ? ldev->bus->name : + "no-bus", dev_name(ldev)); + put_device(ldev); + } + } } mutex_unlock(&acpi_device_lock); return 0; @@ -329,12 +344,14 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) static void physical_device_enable_wakeup(struct acpi_device *adev) { - struct device *dev = acpi_get_physical_device(adev->handle); + struct acpi_device_physical_node *entry; - if (dev && device_can_wakeup(dev)) { - bool enable = !device_may_wakeup(dev); - device_set_wakeup_enable(dev, enable); - } + list_for_each_entry(entry, + &adev->physical_node_list, node) + if (entry->dev && device_can_wakeup(entry->dev)) { + bool enable = !device_may_wakeup(entry->dev); + device_set_wakeup_enable(entry->dev, enable); + } } static ssize_t diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index d1ecca2b641a..d730a939ead1 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -481,6 +481,8 @@ static int acpi_device_register(struct acpi_device *device) INIT_LIST_HEAD(&device->children); INIT_LIST_HEAD(&device->node); INIT_LIST_HEAD(&device->wakeup_list); + INIT_LIST_HEAD(&device->physical_node_list); + mutex_init(&device->physical_node_lock); new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); if (!new_bus_id) { diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c index 507a8e2b9a4c..26b5d4b18dd7 100644 --- a/drivers/pnp/pnpacpi/core.c +++ b/drivers/pnp/pnpacpi/core.c @@ -321,14 +321,9 @@ static int __init acpi_pnp_match(struct device *dev, void *_pnp) { struct acpi_device *acpi = to_acpi_device(dev); struct pnp_dev *pnp = _pnp; - struct device *physical_device; - - physical_device = acpi_get_physical_device(acpi->handle); - if (physical_device) - put_device(physical_device); /* true means it matched */ - return !physical_device + return !acpi->physical_node_count && compare_pnp_id(pnp->id, acpi_device_hid(acpi)); } diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index bde976ee068d..453596d4ce65 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -282,8 +282,16 @@ struct acpi_device_wakeup { int prepare_count; }; -/* Device */ +struct acpi_device_physical_node { + u8 node_id; + struct list_head node; + struct device *dev; +}; +/* set maximum of physical nodes to 32 for expansibility */ +#define ACPI_MAX_PHYSICAL_NODE 32 + +/* Device */ struct acpi_device { int device_type; acpi_handle handle; /* no handle for fixed hardware */ @@ -304,6 +312,10 @@ struct acpi_device { struct device dev; struct acpi_bus_ops bus_ops; /* workaround for different code path for hotplug */ enum acpi_bus_removal_type removal_type; /* indicate for different removal type */ + u8 physical_node_count; + struct list_head physical_node_list; + struct mutex physical_node_lock; + DECLARE_BITMAP(physical_node_id_bitmap, ACPI_MAX_PHYSICAL_NODE); }; static inline void *acpi_driver_data(struct acpi_device *d) @@ -394,7 +406,6 @@ struct acpi_bus_type { }; int register_acpi_bus_type(struct acpi_bus_type *); int unregister_acpi_bus_type(struct acpi_bus_type *); -struct device *acpi_get_physical_device(acpi_handle); struct acpi_pci_root { struct list_head node; |