diff options
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 2162 |
1 files changed, 1464 insertions, 698 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 2b6c21d86b9..f775fa0d850 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -10,14 +10,14 @@ #include <linux/signal.h> #include <linux/kthread.h> #include <linux/dmi.h> +#include <linux/nls.h> -#include <acpi/acpi_drivers.h> +#include <asm/pgtable.h> #include "internal.h" #define _COMPONENT ACPI_BUS_COMPONENT ACPI_MODULE_NAME("scan"); -#define STRUCT_TO_INT(s) (*((int*)&s)) extern struct acpi_device *acpi_root; #define ACPI_BUS_CLASS "system_bus" @@ -26,12 +26,22 @@ extern struct acpi_device *acpi_root; #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) +#define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) + +/* + * If set, devices will be hot-removed even if they cannot be put offline + * gracefully (from the kernel's standpoint). + */ +bool acpi_force_hot_remove; + static const char *dummy_hid = "device"; -static LIST_HEAD(acpi_device_list); static LIST_HEAD(acpi_bus_id_list); +static DEFINE_MUTEX(acpi_scan_lock); +static LIST_HEAD(acpi_scan_handlers_list); DEFINE_MUTEX(acpi_device_lock); LIST_HEAD(acpi_wakeup_device_list); +static DEFINE_MUTEX(acpi_hp_context_lock); struct acpi_device_bus_id{ char bus_id[15]; @@ -39,10 +49,68 @@ struct acpi_device_bus_id{ struct list_head node; }; +void acpi_scan_lock_acquire(void) +{ + mutex_lock(&acpi_scan_lock); +} +EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); + +void acpi_scan_lock_release(void) +{ + mutex_unlock(&acpi_scan_lock); +} +EXPORT_SYMBOL_GPL(acpi_scan_lock_release); + +void acpi_lock_hp_context(void) +{ + mutex_lock(&acpi_hp_context_lock); +} + +void acpi_unlock_hp_context(void) +{ + mutex_unlock(&acpi_hp_context_lock); +} + +void acpi_initialize_hp_context(struct acpi_device *adev, + struct acpi_hotplug_context *hp, + int (*notify)(struct acpi_device *, u32), + void (*uevent)(struct acpi_device *, u32)) +{ + acpi_lock_hp_context(); + acpi_set_hp_context(adev, hp, notify, uevent, NULL); + acpi_unlock_hp_context(); +} +EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); + +int acpi_scan_add_handler(struct acpi_scan_handler *handler) +{ + if (!handler) + return -EINVAL; + + list_add_tail(&handler->list_node, &acpi_scan_handlers_list); + return 0; +} + +int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, + const char *hotplug_profile_name) +{ + int error; + + error = acpi_scan_add_handler(handler); + if (error) + return error; + + acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); + return 0; +} + /* * Creates hid/cid(s) string needed for modalias and uevent * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: * char *modalias: "acpi:IBM0001:ACPI0001" + * Return: 0: no _HID and no _CID + * -EINVAL: output error + * -ENOMEM: output is truncated */ static int create_modalias(struct acpi_device *acpi_dev, char *modalias, int size) @@ -59,8 +127,10 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias, list_for_each_entry(id, &acpi_dev->pnp.ids, list) { count = snprintf(&modalias[len], size, "%s:", id->id); - if (count < 0 || count >= size) - return -EINVAL; + if (count < 0) + return EINVAL; + if (count >= size) + return -ENOMEM; len += count; size -= count; } @@ -69,100 +139,453 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias, return len; } +/* + * Creates uevent modalias field for ACPI enumerated devices. + * Because the other buses does not support ACPI HIDs & CIDs. + * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: + * "acpi:IBM0001:ACPI0001" + */ +int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) +{ + struct acpi_device *acpi_dev; + int len; + + acpi_dev = ACPI_COMPANION(dev); + if (!acpi_dev) + return -ENODEV; + + /* Fall back to bus specific way of modalias exporting */ + if (list_empty(&acpi_dev->pnp.ids)) + return -ENODEV; + + if (add_uevent_var(env, "MODALIAS=")) + return -ENOMEM; + len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], + sizeof(env->buf) - env->buflen); + if (len <= 0) + return len; + env->buflen += len; + return 0; +} +EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); + +/* + * Creates modalias sysfs attribute for ACPI enumerated devices. + * Because the other buses does not support ACPI HIDs & CIDs. + * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: + * "acpi:IBM0001:ACPI0001" + */ +int acpi_device_modalias(struct device *dev, char *buf, int size) +{ + struct acpi_device *acpi_dev; + int len; + + acpi_dev = ACPI_COMPANION(dev); + if (!acpi_dev) + return -ENODEV; + + /* Fall back to bus specific way of modalias exporting */ + if (list_empty(&acpi_dev->pnp.ids)) + return -ENODEV; + + len = create_modalias(acpi_dev, buf, size -1); + if (len <= 0) + return len; + buf[len++] = '\n'; + return len; +} +EXPORT_SYMBOL_GPL(acpi_device_modalias); + static ssize_t acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi_dev = to_acpi_device(dev); int len; - /* Device has no HID and no CID or string is >1024 */ len = create_modalias(acpi_dev, buf, 1024); if (len <= 0) - return 0; + return len; buf[len++] = '\n'; return len; } static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); -static void acpi_bus_hot_remove_device(void *context) +bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) { - struct acpi_device *device; - acpi_handle handle = context; - struct acpi_object_list arg_list; - union acpi_object arg; + struct acpi_device_physical_node *pn; + bool offline = true; + + mutex_lock(&adev->physical_node_lock); + + list_for_each_entry(pn, &adev->physical_node_list, node) + if (device_supports_offline(pn->dev) && !pn->dev->offline) { + if (uevent) + kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); + + offline = false; + break; + } + + mutex_unlock(&adev->physical_node_lock); + return offline; +} + +static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, + void **ret_p) +{ + struct acpi_device *device = NULL; + struct acpi_device_physical_node *pn; + bool second_pass = (bool)data; acpi_status status = AE_OK; if (acpi_bus_get_device(handle, &device)) - return; + return AE_OK; - if (!device) - return; + if (device->handler && !device->handler->hotplug.enabled) { + *ret_p = &device->dev; + return AE_SUPPORT; + } + + mutex_lock(&device->physical_node_lock); + + list_for_each_entry(pn, &device->physical_node_list, node) { + int ret; + + if (second_pass) { + /* Skip devices offlined by the first pass. */ + if (pn->put_online) + continue; + } else { + pn->put_online = false; + } + ret = device_offline(pn->dev); + if (acpi_force_hot_remove) + continue; + + if (ret >= 0) { + pn->put_online = !ret; + } else { + *ret_p = pn->dev; + if (second_pass) { + status = AE_ERROR; + break; + } + } + } + + mutex_unlock(&device->physical_node_lock); + + return status; +} + +static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, + void **ret_p) +{ + struct acpi_device *device = NULL; + struct acpi_device_physical_node *pn; + + if (acpi_bus_get_device(handle, &device)) + return AE_OK; + + mutex_lock(&device->physical_node_lock); + + list_for_each_entry(pn, &device->physical_node_list, node) + if (pn->put_online) { + device_online(pn->dev); + pn->put_online = false; + } + + mutex_unlock(&device->physical_node_lock); + + return AE_OK; +} + +static int acpi_scan_try_to_offline(struct acpi_device *device) +{ + acpi_handle handle = device->handle; + struct device *errdev = NULL; + acpi_status status; + + /* + * Carry out two passes here and ignore errors in the first pass, + * because if the devices in question are memory blocks and + * CONFIG_MEMCG is set, one of the blocks may hold data structures + * that the other blocks depend on, but it is not known in advance which + * block holds them. + * + * If the first pass is successful, the second one isn't needed, though. + */ + status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, + NULL, acpi_bus_offline, (void *)false, + (void **)&errdev); + if (status == AE_SUPPORT) { + dev_warn(errdev, "Offline disabled.\n"); + acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, + acpi_bus_online, NULL, NULL, NULL); + return -EPERM; + } + acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); + if (errdev) { + errdev = NULL; + acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, + NULL, acpi_bus_offline, (void *)true, + (void **)&errdev); + if (!errdev || acpi_force_hot_remove) + acpi_bus_offline(handle, 0, (void *)true, + (void **)&errdev); + + if (errdev && !acpi_force_hot_remove) { + dev_warn(errdev, "Offline failed.\n"); + acpi_bus_online(handle, 0, NULL, NULL); + acpi_walk_namespace(ACPI_TYPE_ANY, handle, + ACPI_UINT32_MAX, acpi_bus_online, + NULL, NULL, NULL); + return -EBUSY; + } + } + return 0; +} + +static int acpi_scan_hot_remove(struct acpi_device *device) +{ + acpi_handle handle = device->handle; + unsigned long long sta; + acpi_status status; + + if (device->handler->hotplug.demand_offline && !acpi_force_hot_remove) { + if (!acpi_scan_is_offline(device, true)) + return -EBUSY; + } else { + int error = acpi_scan_try_to_offline(device); + if (error) + return error; + } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Hot-removing device %s...\n", dev_name(&device->dev))); - if (acpi_bus_trim(device, 1)) { - printk(KERN_ERR PREFIX - "Removing device failed\n"); - return; + acpi_bus_trim(device); + + acpi_evaluate_lck(handle, 0); + /* + * TBD: _EJD support. + */ + status = acpi_evaluate_ej0(handle); + if (status == AE_NOT_FOUND) + return -ENODEV; + else if (ACPI_FAILURE(status)) + return -EIO; + + /* + * Verify if eject was indeed successful. If not, log an error + * message. No need to call _OST since _EJ0 call was made OK. + */ + status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); + if (ACPI_FAILURE(status)) { + acpi_handle_warn(handle, + "Status check after eject failed (0x%x)\n", status); + } else if (sta & ACPI_STA_DEVICE_ENABLED) { + acpi_handle_warn(handle, + "Eject incomplete - status 0x%llx\n", sta); + } + + return 0; +} + +static int acpi_scan_device_not_present(struct acpi_device *adev) +{ + if (!acpi_device_enumerated(adev)) { + dev_warn(&adev->dev, "Still not present\n"); + return -EALREADY; + } + acpi_bus_trim(adev); + return 0; +} + +static int acpi_scan_device_check(struct acpi_device *adev) +{ + int error; + + acpi_bus_get_status(adev); + if (adev->status.present || adev->status.functional) { + /* + * This function is only called for device objects for which + * matching scan handlers exist. The only situation in which + * the scan handler is not attached to this device object yet + * is when the device has just appeared (either it wasn't + * present at all before or it was removed and then added + * again). + */ + if (adev->handler) { + dev_warn(&adev->dev, "Already enumerated\n"); + return -EALREADY; + } + error = acpi_bus_scan(adev->handle); + if (error) { + dev_warn(&adev->dev, "Namespace scan failure\n"); + return error; + } + if (!adev->handler) { + dev_warn(&adev->dev, "Enumeration failure\n"); + error = -ENODEV; + } + } else { + error = acpi_scan_device_not_present(adev); + } + return error; +} + +static int acpi_scan_bus_check(struct acpi_device *adev) +{ + struct acpi_scan_handler *handler = adev->handler; + struct acpi_device *child; + int error; + + acpi_bus_get_status(adev); + if (!(adev->status.present || adev->status.functional)) { + acpi_scan_device_not_present(adev); + return 0; } + if (handler && handler->hotplug.scan_dependent) + return handler->hotplug.scan_dependent(adev); - /* power off device */ - status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); - if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) - printk(KERN_WARNING PREFIX - "Power-off device failed\n"); - - if (device->flags.lockable) { - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = 0; - acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); + error = acpi_bus_scan(adev->handle); + if (error) { + dev_warn(&adev->dev, "Namespace scan failure\n"); + return error; + } + list_for_each_entry(child, &adev->children, node) { + error = acpi_scan_bus_check(child); + if (error) + return error; + } + return 0; +} + +static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) +{ + switch (type) { + case ACPI_NOTIFY_BUS_CHECK: + return acpi_scan_bus_check(adev); + case ACPI_NOTIFY_DEVICE_CHECK: + return acpi_scan_device_check(adev); + case ACPI_NOTIFY_EJECT_REQUEST: + case ACPI_OST_EC_OSPM_EJECT: + if (adev->handler && !adev->handler->hotplug.enabled) { + dev_info(&adev->dev, "Eject disabled\n"); + return -EPERM; + } + acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, + ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); + return acpi_scan_hot_remove(adev); } + return -EINVAL; +} + +void acpi_device_hotplug(struct acpi_device *adev, u32 src) +{ + u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; + int error = -ENODEV; - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = 1; + lock_device_hotplug(); + mutex_lock(&acpi_scan_lock); /* - * TBD: _EJD support. + * The device object's ACPI handle cannot become invalid as long as we + * are holding acpi_scan_lock, but it might have become invalid before + * that lock was acquired. */ - status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); - if (ACPI_FAILURE(status)) - printk(KERN_WARNING PREFIX - "Eject device failed\n"); + if (adev->handle == INVALID_ACPI_HANDLE) + goto err_out; + + if (adev->flags.is_dock_station) { + error = dock_notify(adev, src); + } else if (adev->flags.hotplug_notify) { + error = acpi_generic_hotplug_event(adev, src); + if (error == -EPERM) { + ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; + goto err_out; + } + } else { + int (*notify)(struct acpi_device *, u32); - return; + acpi_lock_hp_context(); + notify = adev->hp ? adev->hp->notify : NULL; + acpi_unlock_hp_context(); + /* + * There may be additional notify handlers for device objects + * without the .event() callback, so ignore them here. + */ + if (notify) + error = notify(adev, src); + else + goto out; + } + if (!error) + ost_code = ACPI_OST_SC_SUCCESS; + + err_out: + acpi_evaluate_ost(adev->handle, src, ost_code, NULL); + + out: + acpi_bus_put_acpi_device(adev); + mutex_unlock(&acpi_scan_lock); + unlock_device_hotplug(); } +static ssize_t real_power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct acpi_device *adev = to_acpi_device(dev); + int state; + int ret; + + ret = acpi_device_get_power(adev, &state); + if (ret) + return ret; + + return sprintf(buf, "%s\n", acpi_power_state_string(state)); +} + +static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); + +static ssize_t power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct acpi_device *adev = to_acpi_device(dev); + + return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); +} + +static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); + static ssize_t acpi_eject_store(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { - int ret = count; - acpi_status status; - acpi_object_type type = 0; struct acpi_device *acpi_device = to_acpi_device(d); + acpi_object_type not_used; + acpi_status status; - if ((!count) || (buf[0] != '1')) { + if (!count || buf[0] != '1') return -EINVAL; - } -#ifndef FORCE_EJECT - if (acpi_device->driver == NULL) { - ret = -ENODEV; - goto err; - } -#endif - status = acpi_get_type(acpi_device->handle, &type); - if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { - ret = -ENODEV; - goto err; - } - acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle); -err: - return ret; + if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) + && !acpi_device->driver) + return -ENODEV; + + status = acpi_get_type(acpi_device->handle, ¬_used); + if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) + return -ENODEV; + + get_device(&acpi_device->dev); + status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); + if (ACPI_SUCCESS(status)) + return count; + + put_device(&acpi_device->dev); + acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, + ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); + return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; } static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); @@ -175,6 +598,25 @@ acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *bu } static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); +static ssize_t acpi_device_uid_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct acpi_device *acpi_dev = to_acpi_device(dev); + + return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); +} +static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); + +static ssize_t acpi_device_adr_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct acpi_device *acpi_dev = to_acpi_device(dev); + + return sprintf(buf, "0x%08x\n", + (unsigned int)(acpi_dev->pnp.bus_address)); +} +static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); + static ssize_t acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi_dev = to_acpi_device(dev); @@ -192,10 +634,60 @@ end: } static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); +/* sysfs file that shows description text from the ACPI _STR method */ +static ssize_t description_show(struct device *dev, + struct device_attribute *attr, + char *buf) { + struct acpi_device *acpi_dev = to_acpi_device(dev); + int result; + + if (acpi_dev->pnp.str_obj == NULL) + return 0; + + /* + * The _STR object contains a Unicode identifier for a device. + * We need to convert to utf-8 so it can be displayed. + */ + result = utf16s_to_utf8s( + (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, + acpi_dev->pnp.str_obj->buffer.length, + UTF16_LITTLE_ENDIAN, buf, + PAGE_SIZE); + + buf[result++] = '\n'; + + return result; +} +static DEVICE_ATTR(description, 0444, description_show, NULL); + +static ssize_t +acpi_device_sun_show(struct device *dev, struct device_attribute *attr, + char *buf) { + struct acpi_device *acpi_dev = to_acpi_device(dev); + + return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); +} +static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); + +static ssize_t status_show(struct device *dev, struct device_attribute *attr, + char *buf) { + struct acpi_device *acpi_dev = to_acpi_device(dev); + acpi_status status; + unsigned long long sta; + + status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); + if (ACPI_FAILURE(status)) + return -ENODEV; + + return sprintf(buf, "%llu\n", sta); +} +static DEVICE_ATTR_RO(status); + static int acpi_device_setup_files(struct acpi_device *dev) { + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; acpi_status status; - acpi_handle temp; + unsigned long long sun; int result = 0; /* @@ -217,32 +709,98 @@ static int acpi_device_setup_files(struct acpi_device *dev) goto end; } + /* + * If device has _STR, 'description' file is created + */ + if (acpi_has_method(dev->handle, "_STR")) { + status = acpi_evaluate_object(dev->handle, "_STR", + NULL, &buffer); + if (ACPI_FAILURE(status)) + buffer.pointer = NULL; + dev->pnp.str_obj = buffer.pointer; + result = device_create_file(&dev->dev, &dev_attr_description); + if (result) + goto end; + } + + if (dev->pnp.type.bus_address) + result = device_create_file(&dev->dev, &dev_attr_adr); + if (dev->pnp.unique_id) + result = device_create_file(&dev->dev, &dev_attr_uid); + + status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); + if (ACPI_SUCCESS(status)) { + dev->pnp.sun = (unsigned long)sun; + result = device_create_file(&dev->dev, &dev_attr_sun); + if (result) + goto end; + } else { + dev->pnp.sun = (unsigned long)-1; + } + + if (acpi_has_method(dev->handle, "_STA")) { + result = device_create_file(&dev->dev, &dev_attr_status); + if (result) + goto end; + } + /* * If device has _EJ0, 'eject' file is created that is used to trigger * hot-removal function from userland. */ - status = acpi_get_handle(dev->handle, "_EJ0", &temp); - if (ACPI_SUCCESS(status)) + if (acpi_has_method(dev->handle, "_EJ0")) { result = device_create_file(&dev->dev, &dev_attr_eject); + if (result) + return result; + } + + if (dev->flags.power_manageable) { + result = device_create_file(&dev->dev, &dev_attr_power_state); + if (result) + return result; + + if (dev->power.flags.power_resources) + result = device_create_file(&dev->dev, + &dev_attr_real_power_state); + } + end: return result; } static void acpi_device_remove_files(struct acpi_device *dev) { - acpi_status status; - acpi_handle temp; + if (dev->flags.power_manageable) { + device_remove_file(&dev->dev, &dev_attr_power_state); + if (dev->power.flags.power_resources) + device_remove_file(&dev->dev, + &dev_attr_real_power_state); + } /* - * If device has _EJ0, 'eject' file is created that is used to trigger - * hot-removal function from userland. + * If device has _STR, remove 'description' file */ - status = acpi_get_handle(dev->handle, "_EJ0", &temp); - if (ACPI_SUCCESS(status)) + if (acpi_has_method(dev->handle, "_STR")) { + kfree(dev->pnp.str_obj); + device_remove_file(&dev->dev, &dev_attr_description); + } + /* + * If device has _EJ0, remove 'eject' file. + */ + if (acpi_has_method(dev->handle, "_EJ0")) device_remove_file(&dev->dev, &dev_attr_eject); + if (acpi_has_method(dev->handle, "_SUN")) + device_remove_file(&dev->dev, &dev_attr_sun); + + if (dev->pnp.unique_id) + device_remove_file(&dev->dev, &dev_attr_uid); + if (dev->pnp.type.bus_address) + device_remove_file(&dev->dev, &dev_attr_adr); device_remove_file(&dev->dev, &dev_attr_modalias); device_remove_file(&dev->dev, &dev_attr_hid); + if (acpi_has_method(dev->handle, "_STA")) + device_remove_file(&dev->dev, &dev_attr_status); if (dev->handle) device_remove_file(&dev->dev, &dev_attr_path); } @@ -250,8 +808,8 @@ static void acpi_device_remove_files(struct acpi_device *dev) ACPI Bus operations -------------------------------------------------------------------------- */ -int acpi_match_device_ids(struct acpi_device *device, - const struct acpi_device_id *ids) +static const struct acpi_device_id *__acpi_match_device( + struct acpi_device *device, const struct acpi_device_id *ids) { const struct acpi_device_id *id; struct acpi_hardware_id *hwid; @@ -261,53 +819,70 @@ int acpi_match_device_ids(struct acpi_device *device, * driver for it. */ if (!device->status.present) - return -ENODEV; + return NULL; for (id = ids; id->id[0]; id++) list_for_each_entry(hwid, &device->pnp.ids, list) if (!strcmp((char *) id->id, hwid->id)) - return 0; + return id; - return -ENOENT; + return NULL; } -EXPORT_SYMBOL(acpi_match_device_ids); -static void acpi_free_ids(struct acpi_device *device) +/** + * acpi_match_device - Match a struct device against a given list of ACPI IDs + * @ids: Array of struct acpi_device_id object to match against. + * @dev: The device structure to match. + * + * Check if @dev has a valid ACPI handle and if there is a struct acpi_device + * object for that handle and use that object to match against a given list of + * device IDs. + * + * Return a pointer to the first matching ID on success or %NULL on failure. + */ +const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, + const struct device *dev) { - struct acpi_hardware_id *id, *tmp; + struct acpi_device *adev; + acpi_handle handle = ACPI_HANDLE(dev); - list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { - kfree(id->id); - kfree(id); - } + if (!ids || !handle || acpi_bus_get_device(handle, &adev)) + return NULL; + + return __acpi_match_device(adev, ids); } +EXPORT_SYMBOL_GPL(acpi_match_device); -static void acpi_device_release(struct device *dev) +int acpi_match_device_ids(struct acpi_device *device, + const struct acpi_device_id *ids) { - struct acpi_device *acpi_dev = to_acpi_device(dev); - - acpi_free_ids(acpi_dev); - kfree(acpi_dev); + return __acpi_match_device(device, ids) ? 0 : -ENOENT; } +EXPORT_SYMBOL(acpi_match_device_ids); -static int acpi_device_suspend(struct device *dev, pm_message_t state) +static void acpi_free_power_resources_lists(struct acpi_device *device) { - struct acpi_device *acpi_dev = to_acpi_device(dev); - struct acpi_driver *acpi_drv = acpi_dev->driver; + int i; - if (acpi_drv && acpi_drv->ops.suspend) - return acpi_drv->ops.suspend(acpi_dev, state); - return 0; + if (device->wakeup.flags.valid) + acpi_power_resources_list_free(&device->wakeup.resources); + + if (!device->flags.power_manageable) + return; + + for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { + struct acpi_device_power_state *ps = &device->power.states[i]; + acpi_power_resources_list_free(&ps->resources); + } } -static int acpi_device_resume(struct device *dev) +static void acpi_device_release(struct device *dev) { struct acpi_device *acpi_dev = to_acpi_device(dev); - struct acpi_driver *acpi_drv = acpi_dev->driver; - if (acpi_drv && acpi_drv->ops.resume) - return acpi_drv->ops.resume(acpi_dev); - return 0; + acpi_free_pnp_ids(&acpi_dev->pnp); + acpi_free_power_resources_lists(acpi_dev); + kfree(acpi_dev); } static int acpi_bus_match(struct device *dev, struct device_driver *drv) @@ -315,7 +890,8 @@ static int acpi_bus_match(struct device *dev, struct device_driver *drv) struct acpi_device *acpi_dev = to_acpi_device(dev); struct acpi_driver *acpi_drv = to_acpi_driver(drv); - return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); + return acpi_dev->flags.match_driver + && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); } static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) @@ -330,8 +906,8 @@ static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) return -ENOMEM; len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], sizeof(env->buf) - env->buflen); - if (len >= (sizeof(env->buf) - env->buflen)) - return -ENOMEM; + if (len <= 0) + return len; env->buflen += len; return 0; } @@ -390,35 +966,43 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device) acpi_device_notify); } -static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); -static int acpi_start_single_object(struct acpi_device *); -static int acpi_device_probe(struct device * dev) +static int acpi_device_probe(struct device *dev) { struct acpi_device *acpi_dev = to_acpi_device(dev); struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); int ret; - ret = acpi_bus_driver_init(acpi_dev, acpi_drv); - if (!ret) { - if (acpi_dev->bus_ops.acpi_op_start) - acpi_start_single_object(acpi_dev); - - if (acpi_drv->ops.notify) { - ret = acpi_device_install_notify_handler(acpi_dev); - if (ret) { - if (acpi_drv->ops.remove) - acpi_drv->ops.remove(acpi_dev, - acpi_dev->removal_type); - return ret; - } - } + if (acpi_dev->handler) + return -EINVAL; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Found driver [%s] for device [%s]\n", - acpi_drv->name, acpi_dev->pnp.bus_id)); - get_device(dev); + if (!acpi_drv->ops.add) + return -ENOSYS; + + ret = acpi_drv->ops.add(acpi_dev); + if (ret) + return ret; + + acpi_dev->driver = acpi_drv; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Driver [%s] successfully bound to device [%s]\n", + acpi_drv->name, acpi_dev->pnp.bus_id)); + + if (acpi_drv->ops.notify) { + ret = acpi_device_install_notify_handler(acpi_dev); + if (ret) { + if (acpi_drv->ops.remove) + acpi_drv->ops.remove(acpi_dev); + + acpi_dev->driver = NULL; + acpi_dev->driver_data = NULL; + return ret; + } } - return ret; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", + acpi_drv->name, acpi_dev->pnp.bus_id)); + get_device(dev); + return 0; } static int acpi_device_remove(struct device * dev) @@ -430,7 +1014,7 @@ static int acpi_device_remove(struct device * dev) if (acpi_drv->ops.notify) acpi_device_remove_notify_handler(acpi_dev); if (acpi_drv->ops.remove) - acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); + acpi_drv->ops.remove(acpi_dev); } acpi_dev->driver = NULL; acpi_dev->driver_data = NULL; @@ -441,20 +1025,161 @@ static int acpi_device_remove(struct device * dev) struct bus_type acpi_bus_type = { .name = "acpi", - .suspend = acpi_device_suspend, - .resume = acpi_device_resume, .match = acpi_bus_match, .probe = acpi_device_probe, .remove = acpi_device_remove, .uevent = acpi_device_uevent, }; -static int acpi_device_register(struct acpi_device *device) +static void acpi_device_del(struct acpi_device *device) +{ + mutex_lock(&acpi_device_lock); + if (device->parent) + list_del(&device->node); + + list_del(&device->wakeup_list); + mutex_unlock(&acpi_device_lock); + + acpi_power_add_remove_device(device, false); + acpi_device_remove_files(device); + if (device->remove) + device->remove(device); + + device_del(&device->dev); +} + +static LIST_HEAD(acpi_device_del_list); +static DEFINE_MUTEX(acpi_device_del_lock); + +static void acpi_device_del_work_fn(struct work_struct *work_not_used) +{ + for (;;) { + struct acpi_device *adev; + + mutex_lock(&acpi_device_del_lock); + + if (list_empty(&acpi_device_del_list)) { + mutex_unlock(&acpi_device_del_lock); + break; + } + adev = list_first_entry(&acpi_device_del_list, + struct acpi_device, del_list); + list_del(&adev->del_list); + + mutex_unlock(&acpi_device_del_lock); + + acpi_device_del(adev); + /* + * Drop references to all power resources that might have been + * used by the device. + */ + acpi_power_transition(adev, ACPI_STATE_D3_COLD); + put_device(&adev->dev); + } +} + +/** + * acpi_scan_drop_device - Drop an ACPI device object. + * @handle: Handle of an ACPI namespace node, not used. + * @context: Address of the ACPI device object to drop. + * + * This is invoked by acpi_ns_delete_node() during the removal of the ACPI + * namespace node the device object pointed to by @context is attached to. + * + * The unregistration is carried out asynchronously to avoid running + * acpi_device_del() under the ACPICA's namespace mutex and the list is used to + * ensure the correct ordering (the device objects must be unregistered in the + * same order in which the corresponding namespace nodes are deleted). + */ +static void acpi_scan_drop_device(acpi_handle handle, void *context) +{ + static DECLARE_WORK(work, acpi_device_del_work_fn); + struct acpi_device *adev = context; + + mutex_lock(&acpi_device_del_lock); + + /* + * Use the ACPI hotplug workqueue which is ordered, so this work item + * won't run after any hotplug work items submitted subsequently. That + * prevents attempts to register device objects identical to those being + * deleted from happening concurrently (such attempts result from + * hotplug events handled via the ACPI hotplug workqueue). It also will + * run after all of the work items submitted previosuly, which helps + * those work items to ensure that they are not accessing stale device + * objects. + */ + if (list_empty(&acpi_device_del_list)) + acpi_queue_hotplug_work(&work); + + list_add_tail(&adev->del_list, &acpi_device_del_list); + /* Make acpi_ns_validate_handle() return NULL for this handle. */ + adev->handle = INVALID_ACPI_HANDLE; + + mutex_unlock(&acpi_device_del_lock); +} + +static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, + void (*callback)(void *)) +{ + acpi_status status; + + if (!device) + return -EINVAL; + + status = acpi_get_data_full(handle, acpi_scan_drop_device, + (void **)device, callback); + if (ACPI_FAILURE(status) || !*device) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", + handle)); + return -ENODEV; + } + return 0; +} + +int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) +{ + return acpi_get_device_data(handle, device, NULL); +} +EXPORT_SYMBOL(acpi_bus_get_device); + +static void get_acpi_device(void *dev) +{ + if (dev) + get_device(&((struct acpi_device *)dev)->dev); +} + +struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) +{ + struct acpi_device *adev = NULL; + + acpi_get_device_data(handle, &adev, get_acpi_device); + return adev; +} + +void acpi_bus_put_acpi_device(struct acpi_device *adev) +{ + put_device(&adev->dev); +} + +int acpi_device_add(struct acpi_device *device, + void (*release)(struct device *)) { int result; struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; int found = 0; + if (device->handle) { + acpi_status status; + + status = acpi_attach_data(device->handle, acpi_scan_drop_device, + device); + if (ACPI_FAILURE(status)) { + acpi_handle_err(device->handle, + "Unable to attach device data\n"); + return -ENODEV; + } + } + /* * Linkage * ------- @@ -463,11 +1188,15 @@ 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); + INIT_LIST_HEAD(&device->del_list); + mutex_init(&device->physical_node_lock); new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); if (!new_bus_id) { - printk(KERN_ERR PREFIX "Memory allocation error\n"); - return -ENOMEM; + pr_err(PREFIX "Memory allocation error\n"); + result = -ENOMEM; + goto err_detach; } mutex_lock(&acpi_device_lock); @@ -502,11 +1231,11 @@ static int acpi_device_register(struct acpi_device *device) if (device->parent) device->dev.parent = &device->parent->dev; device->dev.bus = &acpi_bus_type; - device->dev.release = &acpi_device_release; - result = device_register(&device->dev); + device->dev.release = release; + result = device_add(&device->dev); if (result) { dev_err(&device->dev, "Error registering device\n"); - goto end; + goto err; } result = acpi_device_setup_files(device); @@ -514,92 +1243,24 @@ static int acpi_device_register(struct acpi_device *device) printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", dev_name(&device->dev)); - device->removal_type = ACPI_BUS_REMOVAL_NORMAL; return 0; -end: - mutex_lock(&acpi_device_lock); - if (device->parent) - list_del(&device->node); - list_del(&device->wakeup_list); - mutex_unlock(&acpi_device_lock); - return result; -} -static void acpi_device_unregister(struct acpi_device *device, int type) -{ + err: mutex_lock(&acpi_device_lock); if (device->parent) list_del(&device->node); - list_del(&device->wakeup_list); mutex_unlock(&acpi_device_lock); - acpi_detach_data(device->handle, acpi_bus_data_handler); - - acpi_device_remove_files(device); - device_unregister(&device->dev); + err_detach: + acpi_detach_data(device->handle, acpi_scan_drop_device); + return result; } /* -------------------------------------------------------------------------- Driver Management -------------------------------------------------------------------------- */ /** - * acpi_bus_driver_init - add a device to a driver - * @device: the device to add and initialize - * @driver: driver for the device - * - * Used to initialize a device via its device driver. Called whenever a - * driver is bound to a device. Invokes the driver's add() ops. - */ -static int -acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) -{ - int result = 0; - - if (!device || !driver) - return -EINVAL; - - if (!driver->ops.add) - return -ENOSYS; - - result = driver->ops.add(device); - if (result) { - device->driver = NULL; - device->driver_data = NULL; - return result; - } - - device->driver = driver; - - /* - * TBD - Configuration Management: Assign resources to device based - * upon possible configuration and currently allocated resources. - */ - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Driver successfully bound to device\n")); - return 0; -} - -static int acpi_start_single_object(struct acpi_device *device) -{ - int result = 0; - struct acpi_driver *driver; - - - if (!(driver = device->driver)) - return 0; - - if (driver->ops.start) { - result = driver->ops.start(device); - if (result && driver->ops.remove) - driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); - } - - return result; -} - -/** * acpi_bus_register_driver - register a driver with the ACPI bus * @driver: driver being registered * @@ -624,7 +1285,7 @@ int acpi_bus_register_driver(struct acpi_driver *driver) EXPORT_SYMBOL(acpi_bus_register_driver); /** - * acpi_bus_unregister_driver - unregisters a driver with the APIC bus + * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus * @driver: driver to unregister * * Unregisters a driver with the ACPI bus. Searches the namespace for all @@ -642,29 +1303,23 @@ EXPORT_SYMBOL(acpi_bus_unregister_driver); -------------------------------------------------------------------------- */ static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) { + struct acpi_device *device = NULL; acpi_status status; - int ret; - struct acpi_device *device; /* * Fixed hardware devices do not appear in the namespace and do not * have handles, but we fabricate acpi_devices for them, so we have * to deal with them specially. */ - if (handle == NULL) + if (!handle) return acpi_root; do { status = acpi_get_parent(handle, &handle); - if (status == AE_NULL_ENTRY) - return NULL; if (ACPI_FAILURE(status)) - return acpi_root; - - ret = acpi_bus_get_device(handle, &device); - if (ret == 0) - return device; - } while (1); + return status == AE_NULL_ENTRY ? NULL : acpi_root; + } while (acpi_bus_get_device(handle, &device)); + return device; } acpi_status @@ -690,89 +1345,111 @@ acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) } EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); -void acpi_bus_data_handler(acpi_handle handle, void *context) +static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, + struct acpi_device_wakeup *wakeup) { + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *package = NULL; + union acpi_object *element = NULL; + acpi_status status; + int err = -ENODATA; - /* TBD */ + if (!wakeup) + return -EINVAL; - return; -} + INIT_LIST_HEAD(&wakeup->resources); -static int acpi_bus_get_perf_flags(struct acpi_device *device) -{ - device->performance.state = ACPI_STATE_UNKNOWN; - return 0; -} + /* _PRW */ + status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); + return err; + } -static acpi_status -acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, - union acpi_object *package) -{ - int i = 0; - union acpi_object *element = NULL; + package = (union acpi_object *)buffer.pointer; - if (!device || !package || (package->package.count < 2)) - return AE_BAD_PARAMETER; + if (!package || package->package.count < 2) + goto out; element = &(package->package.elements[0]); if (!element) - return AE_BAD_PARAMETER; + goto out; + if (element->type == ACPI_TYPE_PACKAGE) { if ((element->package.count < 2) || (element->package.elements[0].type != ACPI_TYPE_LOCAL_REFERENCE) || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) - return AE_BAD_DATA; - device->wakeup.gpe_device = + goto out; + + wakeup->gpe_device = element->package.elements[0].reference.handle; - device->wakeup.gpe_number = + wakeup->gpe_number = (u32) element->package.elements[1].integer.value; } else if (element->type == ACPI_TYPE_INTEGER) { - device->wakeup.gpe_number = element->integer.value; - } else - return AE_BAD_DATA; + wakeup->gpe_device = NULL; + wakeup->gpe_number = element->integer.value; + } else { + goto out; + } element = &(package->package.elements[1]); - if (element->type != ACPI_TYPE_INTEGER) { - return AE_BAD_DATA; - } - device->wakeup.sleep_state = element->integer.value; + if (element->type != ACPI_TYPE_INTEGER) + goto out; - if ((package->package.count - 2) > ACPI_MAX_HANDLES) { - return AE_NO_MEMORY; - } - device->wakeup.resources.count = package->package.count - 2; - for (i = 0; i < device->wakeup.resources.count; i++) { - element = &(package->package.elements[i + 2]); - if (element->type != ACPI_TYPE_LOCAL_REFERENCE) - return AE_BAD_DATA; + wakeup->sleep_state = element->integer.value; - device->wakeup.resources.handles[i] = element->reference.handle; - } + err = acpi_extract_power_resources(package, 2, &wakeup->resources); + if (err) + goto out; - acpi_gpe_can_wake(device->wakeup.gpe_device, device->wakeup.gpe_number); + if (!list_empty(&wakeup->resources)) { + int sleep_state; - return AE_OK; + err = acpi_power_wakeup_list_init(&wakeup->resources, + &sleep_state); + if (err) { + acpi_handle_warn(handle, "Retrieving current states " + "of wakeup power resources failed\n"); + acpi_power_resources_list_free(&wakeup->resources); + goto out; + } + if (sleep_state < wakeup->sleep_state) { + acpi_handle_warn(handle, "Overriding _PRW sleep state " + "(S%d) by S%d from power resources\n", + (int)wakeup->sleep_state, sleep_state); + wakeup->sleep_state = sleep_state; + } + } + acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); + + out: + kfree(buffer.pointer); + return err; } static void acpi_bus_set_run_wake_flags(struct acpi_device *device) { struct acpi_device_id button_device_ids[] = { - {"PNP0C0D", 0}, {"PNP0C0C", 0}, + {"PNP0C0D", 0}, {"PNP0C0E", 0}, {"", 0}, }; acpi_status status; acpi_event_status event_status; - device->wakeup.run_wake_count = 0; device->wakeup.flags.notifier_present = 0; /* Power button, Lid switch always enable wakeup */ if (!acpi_match_device_ids(device, button_device_ids)) { device->wakeup.flags.run_wake = 1; - device->wakeup.flags.always_enabled = 1; + if (!acpi_match_device_ids(device, &button_device_ids[1])) { + /* Do not use Lid/sleep button for S5 wakeup */ + if (device->wakeup.sleep_state == ACPI_STATE_S5) + device->wakeup.sleep_state = ACPI_STATE_S4; + } + device_set_wakeup_capable(&device->dev, true); return; } @@ -784,29 +1461,21 @@ static void acpi_bus_set_run_wake_flags(struct acpi_device *device) !!(event_status & ACPI_EVENT_FLAG_HANDLE); } -static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) +static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) { - acpi_status status = 0; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *package = NULL; - int psw_error; + int err; - /* _PRW */ - status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); - goto end; - } + /* Presence of _PRW indicates wake capable */ + if (!acpi_has_method(device->handle, "_PRW")) + return; - package = (union acpi_object *)buffer.pointer; - status = acpi_bus_extract_wakeup_device_power_package(device, package); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); - goto end; + err = acpi_bus_extract_wakeup_device_power_package(device->handle, + &device->wakeup); + if (err) { + dev_err(&device->dev, "_PRW evaluation error: %d\n", err); + return; } - kfree(buffer.pointer); - device->wakeup.flags.valid = 1; device->wakeup.prepare_count = 0; acpi_bus_set_run_wake_flags(device); @@ -816,125 +1485,122 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) * So it is necessary to call _DSW object first. Only when it is not * present will the _PSW object used. */ - psw_error = acpi_device_sleep_wake(device, 0, 0, 0); - if (psw_error) + err = acpi_device_sleep_wake(device, 0, 0, 0); + if (err) ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in _DSW or _PSW evaluation\n")); +} -end: - if (ACPI_FAILURE(status)) - device->flags.wake_capable = 0; - return 0; +static void acpi_bus_init_power_state(struct acpi_device *device, int state) +{ + struct acpi_device_power_state *ps = &device->power.states[state]; + char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + acpi_status status; + + INIT_LIST_HEAD(&ps->resources); + + /* Evaluate "_PRx" to get referenced power resources */ + status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); + if (ACPI_SUCCESS(status)) { + union acpi_object *package = buffer.pointer; + + if (buffer.length && package + && package->type == ACPI_TYPE_PACKAGE + && package->package.count) { + int err = acpi_extract_power_resources(package, 0, + &ps->resources); + if (!err) + device->power.flags.power_resources = 1; + } + ACPI_FREE(buffer.pointer); + } + + /* Evaluate "_PSx" to see if we can do explicit sets */ + pathname[2] = 'S'; + if (acpi_has_method(device->handle, pathname)) + ps->flags.explicit_set = 1; + + /* + * State is valid if there are means to put the device into it. + * D3hot is only valid if _PR3 present. + */ + if (!list_empty(&ps->resources) + || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { + ps->flags.valid = 1; + ps->flags.os_accessible = 1; + } + + ps->power = -1; /* Unknown - driver assigned */ + ps->latency = -1; /* Unknown - driver assigned */ } -static int acpi_bus_get_power_flags(struct acpi_device *device) +static void acpi_bus_get_power_flags(struct acpi_device *device) { - acpi_status status = 0; - acpi_handle handle = NULL; - u32 i = 0; + u32 i; + /* Presence of _PS0|_PR0 indicates 'power manageable' */ + if (!acpi_has_method(device->handle, "_PS0") && + !acpi_has_method(device->handle, "_PR0")) + return; + + device->flags.power_manageable = 1; /* * Power Management Flags */ - status = acpi_get_handle(device->handle, "_PSC", &handle); - if (ACPI_SUCCESS(status)) + if (acpi_has_method(device->handle, "_PSC")) device->power.flags.explicit_get = 1; - status = acpi_get_handle(device->handle, "_IRC", &handle); - if (ACPI_SUCCESS(status)) + + if (acpi_has_method(device->handle, "_IRC")) device->power.flags.inrush_current = 1; + if (acpi_has_method(device->handle, "_DSW")) + device->power.flags.dsw_present = 1; + /* * Enumerate supported power management states */ - for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { - struct acpi_device_power_state *ps = &device->power.states[i]; - char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; - - /* Evaluate "_PRx" to se if power resources are referenced */ - acpi_evaluate_reference(device->handle, object_name, NULL, - &ps->resources); - if (ps->resources.count) { - device->power.flags.power_resources = 1; - ps->flags.valid = 1; - } - - /* Evaluate "_PSx" to see if we can do explicit sets */ - object_name[2] = 'S'; - status = acpi_get_handle(device->handle, object_name, &handle); - if (ACPI_SUCCESS(status)) { - ps->flags.explicit_set = 1; - ps->flags.valid = 1; - } + for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) + acpi_bus_init_power_state(device, i); - /* State is valid if we have some power control */ - if (ps->resources.count || ps->flags.explicit_set) - ps->flags.valid = 1; - - ps->power = -1; /* Unknown - driver assigned */ - ps->latency = -1; /* Unknown - driver assigned */ - } + INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); /* Set defaults for D0 and D3 states (always valid) */ device->power.states[ACPI_STATE_D0].flags.valid = 1; device->power.states[ACPI_STATE_D0].power = 100; - device->power.states[ACPI_STATE_D3].flags.valid = 1; - device->power.states[ACPI_STATE_D3].power = 0; + device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; + device->power.states[ACPI_STATE_D3_COLD].power = 0; - /* TBD: System wake support and resource requirements. */ + /* Set D3cold's explicit_set flag if _PS3 exists. */ + if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) + device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; - device->power.state = ACPI_STATE_UNKNOWN; - acpi_bus_get_power(device->handle, &(device->power.state)); + /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ + if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || + device->power.flags.power_resources) + device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; - return 0; + if (acpi_bus_init_power(device)) { + acpi_free_power_resources_lists(device); + device->flags.power_manageable = 0; + } } -static int acpi_bus_get_flags(struct acpi_device *device) +static void acpi_bus_get_flags(struct acpi_device *device) { - acpi_status status = AE_OK; - acpi_handle temp = NULL; - - /* Presence of _STA indicates 'dynamic_status' */ - status = acpi_get_handle(device->handle, "_STA", &temp); - if (ACPI_SUCCESS(status)) + if (acpi_has_method(device->handle, "_STA")) device->flags.dynamic_status = 1; /* Presence of _RMV indicates 'removable' */ - status = acpi_get_handle(device->handle, "_RMV", &temp); - if (ACPI_SUCCESS(status)) + if (acpi_has_method(device->handle, "_RMV")) device->flags.removable = 1; /* Presence of _EJD|_EJ0 indicates 'ejectable' */ - status = acpi_get_handle(device->handle, "_EJD", &temp); - if (ACPI_SUCCESS(status)) + if (acpi_has_method(device->handle, "_EJD") || + acpi_has_method(device->handle, "_EJ0")) device->flags.ejectable = 1; - else { - status = acpi_get_handle(device->handle, "_EJ0", &temp); - if (ACPI_SUCCESS(status)) - device->flags.ejectable = 1; - } - - /* Presence of _LCK indicates 'lockable' */ - status = acpi_get_handle(device->handle, "_LCK", &temp); - if (ACPI_SUCCESS(status)) - device->flags.lockable = 1; - - /* Presence of _PS0|_PR0 indicates 'power manageable' */ - status = acpi_get_handle(device->handle, "_PS0", &temp); - if (ACPI_FAILURE(status)) - status = acpi_get_handle(device->handle, "_PR0", &temp); - if (ACPI_SUCCESS(status)) - device->flags.power_manageable = 1; - - /* Presence of _PRW indicates wake capable */ - status = acpi_get_handle(device->handle, "_PRW", &temp); - if (ACPI_SUCCESS(status)) - device->flags.wake_capable = 1; - - /* TBD: Performance management */ - - return 0; } static void acpi_device_get_busid(struct acpi_device *device) @@ -976,48 +1642,66 @@ static void acpi_device_get_busid(struct acpi_device *device) } /* - * acpi_bay_match - see if a device is an ejectable driver bay + * acpi_ata_match - see if an acpi object is an ATA device + * + * If an acpi object has one of the ACPI ATA methods defined, + * then we can safely call it an ATA device. + */ +bool acpi_ata_match(acpi_handle handle) +{ + return acpi_has_method(handle, "_GTF") || + acpi_has_method(handle, "_GTM") || + acpi_has_method(handle, "_STM") || + acpi_has_method(handle, "_SDD"); +} + +/* + * acpi_bay_match - see if an acpi object is an ejectable driver bay * * If an acpi object is ejectable and has one of the ACPI ATA methods defined, * then we can safely call it an ejectable drive bay */ -static int acpi_bay_match(struct acpi_device *device){ - acpi_status status; - acpi_handle handle; - acpi_handle tmp; +bool acpi_bay_match(acpi_handle handle) +{ acpi_handle phandle; - handle = device->handle; + if (!acpi_has_method(handle, "_EJ0")) + return false; + if (acpi_ata_match(handle)) + return true; + if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) + return false; - status = acpi_get_handle(handle, "_EJ0", &tmp); - if (ACPI_FAILURE(status)) - return -ENODEV; + return acpi_ata_match(phandle); +} - if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) - return 0; +bool acpi_device_is_battery(struct acpi_device *adev) +{ + struct acpi_hardware_id *hwid; - if (acpi_get_parent(handle, &phandle)) - return -ENODEV; + list_for_each_entry(hwid, &adev->pnp.ids, list) + if (!strcmp("PNP0C0A", hwid->id)) + return true; - if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) - return 0; + return false; +} - return -ENODEV; +static bool is_ejectable_bay(struct acpi_device *adev) +{ + acpi_handle handle = adev->handle; + + if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) + return true; + + return acpi_bay_match(handle); } /* - * acpi_dock_match - see if a device has a _DCK method + * acpi_dock_match - see if an acpi object has a _DCK method */ -static int acpi_dock_match(struct acpi_device *device) +bool acpi_dock_match(acpi_handle handle) { - acpi_handle tmp; - return acpi_get_handle(device->handle, "_DCK", &tmp); + return acpi_has_method(handle, "_DCK"); } const char *acpi_device_hid(struct acpi_device *device) @@ -1032,7 +1716,7 @@ const char *acpi_device_hid(struct acpi_device *device) } EXPORT_SYMBOL(acpi_device_hid); -static void acpi_add_id(struct acpi_device *device, const char *dev_id) +static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) { struct acpi_hardware_id *id; @@ -1040,14 +1724,14 @@ static void acpi_add_id(struct acpi_device *device, const char *dev_id) if (!id) return; - id->id = kmalloc(strlen(dev_id) + 1, GFP_KERNEL); + id->id = kstrdup(dev_id, GFP_KERNEL); if (!id->id) { kfree(id); return; } - strcpy(id->id, dev_id); - list_add_tail(&id->list, &device->pnp.ids); + list_add_tail(&id->list, &pnp->ids); + pnp->type.hardware_id = 1; } /* @@ -1055,67 +1739,80 @@ static void acpi_add_id(struct acpi_device *device, const char *dev_id) * lacks the SMBUS01 HID and the methods do not have the necessary "_" * prefix. Work around this. */ -static int acpi_ibm_smbus_match(struct acpi_device *device) +static bool acpi_ibm_smbus_match(acpi_handle handle) { - acpi_handle h_dummy; - struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; - int result; + char node_name[ACPI_PATH_SEGMENT_LENGTH]; + struct acpi_buffer path = { sizeof(node_name), node_name }; if (!dmi_name_in_vendors("IBM")) - return -ENODEV; + return false; /* Look for SMBS object */ - result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); - if (result) - return result; - - if (strcmp("SMBS", path.pointer)) { - result = -ENODEV; - goto out; - } + if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || + strcmp("SMBS", path.pointer)) + return false; /* Does it have the necessary (but misnamed) methods? */ - result = -ENODEV; - if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && - ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && - ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) - result = 0; -out: - kfree(path.pointer); - return result; + if (acpi_has_method(handle, "SBI") && + acpi_has_method(handle, "SBR") && + acpi_has_method(handle, "SBW")) + return true; + + return false; } -static void acpi_device_set_id(struct acpi_device *device) +static bool acpi_object_is_system_bus(acpi_handle handle) +{ + acpi_handle tmp; + + if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && + tmp == handle) + return true; + if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && + tmp == handle) + return true; + + return false; +} + +static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, + int device_type) { acpi_status status; struct acpi_device_info *info; - struct acpica_device_id_list *cid_list; + struct acpi_pnp_device_id_list *cid_list; int i; - switch (device->device_type) { + switch (device_type) { case ACPI_BUS_TYPE_DEVICE: - if (ACPI_IS_ROOT_DEVICE(device)) { - acpi_add_id(device, ACPI_SYSTEM_HID); + if (handle == ACPI_ROOT_OBJECT) { + acpi_add_id(pnp, ACPI_SYSTEM_HID); break; } - status = acpi_get_object_info(device->handle, &info); + status = acpi_get_object_info(handle, &info); if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); + pr_err(PREFIX "%s: Error reading device info\n", + __func__); return; } - if (info->valid & ACPI_VALID_HID) - acpi_add_id(device, info->hardware_id.string); + if (info->valid & ACPI_VALID_HID) { + acpi_add_id(pnp, info->hardware_id.string); + pnp->type.platform_id = 1; + } if (info->valid & ACPI_VALID_CID) { cid_list = &info->compatible_id_list; for (i = 0; i < cid_list->count; i++) - acpi_add_id(device, cid_list->ids[i].string); + acpi_add_id(pnp, cid_list->ids[i].string); } if (info->valid & ACPI_VALID_ADR) { - device->pnp.bus_address = info->address; - device->flags.bus_address = 1; + pnp->bus_address = info->address; + pnp->type.bus_address = 1; } + if (info->valid & ACPI_VALID_UID) + pnp->unique_id = kstrdup(info->unique_id.string, + GFP_KERNEL); kfree(info); @@ -1123,90 +1820,79 @@ static void acpi_device_set_id(struct acpi_device *device) * Some devices don't reliably have _HIDs & _CIDs, so add * synthetic HIDs to make sure drivers can find them. */ - if (acpi_is_video_device(device)) - acpi_add_id(device, ACPI_VIDEO_HID); - else if (ACPI_SUCCESS(acpi_bay_match(device))) - acpi_add_id(device, ACPI_BAY_HID); - else if (ACPI_SUCCESS(acpi_dock_match(device))) - acpi_add_id(device, ACPI_DOCK_HID); - else if (!acpi_ibm_smbus_match(device)) - acpi_add_id(device, ACPI_SMBUS_IBM_HID); - else if (!acpi_device_hid(device) && - ACPI_IS_ROOT_DEVICE(device->parent)) { - acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ - strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); - strcpy(device->pnp.device_class, ACPI_BUS_CLASS); + if (acpi_is_video_device(handle)) + acpi_add_id(pnp, ACPI_VIDEO_HID); + else if (acpi_bay_match(handle)) + acpi_add_id(pnp, ACPI_BAY_HID); + else if (acpi_dock_match(handle)) + acpi_add_id(pnp, ACPI_DOCK_HID); + else if (acpi_ibm_smbus_match(handle)) + acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); + else if (list_empty(&pnp->ids) && + acpi_object_is_system_bus(handle)) { + /* \_SB, \_TZ, LNXSYBUS */ + acpi_add_id(pnp, ACPI_BUS_HID); + strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); + strcpy(pnp->device_class, ACPI_BUS_CLASS); } break; case ACPI_BUS_TYPE_POWER: - acpi_add_id(device, ACPI_POWER_HID); + acpi_add_id(pnp, ACPI_POWER_HID); break; case ACPI_BUS_TYPE_PROCESSOR: - acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); + acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); break; case ACPI_BUS_TYPE_THERMAL: - acpi_add_id(device, ACPI_THERMAL_HID); + acpi_add_id(pnp, ACPI_THERMAL_HID); break; case ACPI_BUS_TYPE_POWER_BUTTON: - acpi_add_id(device, ACPI_BUTTON_HID_POWERF); + acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); break; case ACPI_BUS_TYPE_SLEEP_BUTTON: - acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); + acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); break; } } -static int acpi_device_set_context(struct acpi_device *device) +void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) { - acpi_status status; - - /* - * Context - * ------- - * Attach this 'struct acpi_device' to the ACPI object. This makes - * resolutions from handle->device very efficient. Fixed hardware - * devices have no handles, so we skip them. - */ - if (!device->handle) - return 0; - - status = acpi_attach_data(device->handle, - acpi_bus_data_handler, device); - if (ACPI_SUCCESS(status)) - return 0; + struct acpi_hardware_id *id, *tmp; - printk(KERN_ERR PREFIX "Error attaching device data\n"); - return -ENODEV; + list_for_each_entry_safe(id, tmp, &pnp->ids, list) { + kfree(id->id); + kfree(id); + } + kfree(pnp->unique_id); } -static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) +void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, + int type, unsigned long long sta) { - if (!dev) - return -EINVAL; - - dev->removal_type = ACPI_BUS_REMOVAL_EJECT; - device_release_driver(&dev->dev); - - if (!rmdevice) - return 0; - - /* - * unbind _ADR-Based Devices when hot removal - */ - if (dev->flags.bus_address) { - if ((dev->parent) && (dev->parent->ops.unbind)) - dev->parent->ops.unbind(dev); - } - acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); + INIT_LIST_HEAD(&device->pnp.ids); + device->device_type = type; + device->handle = handle; + device->parent = acpi_bus_get_parent(handle); + acpi_set_device_status(device, sta); + acpi_device_get_busid(device); + acpi_set_pnp_ids(handle, &device->pnp, type); + acpi_bus_get_flags(device); + device->flags.match_driver = false; + device->flags.initialized = true; + device->flags.visited = false; + device_initialize(&device->dev); + dev_set_uevent_suppress(&device->dev, true); +} - return 0; +void acpi_device_add_finalize(struct acpi_device *device) +{ + dev_set_uevent_suppress(&device->dev, false); + kobject_uevent(&device->dev.kobj, KOBJ_ADD); } static int acpi_add_single_object(struct acpi_device **child, acpi_handle handle, int type, - unsigned long long sta, - struct acpi_bus_ops *ops) + unsigned long long sta) { int result; struct acpi_device *device; @@ -1218,94 +1904,27 @@ static int acpi_add_single_object(struct acpi_device **child, return -ENOMEM; } - INIT_LIST_HEAD(&device->pnp.ids); - device->device_type = type; - device->handle = handle; - device->parent = acpi_bus_get_parent(handle); - device->bus_ops = *ops; /* workround for not call .start */ - STRUCT_TO_INT(device->status) = sta; - - acpi_device_get_busid(device); + acpi_init_device_object(device, handle, type, sta); + acpi_bus_get_power_flags(device); + acpi_bus_get_wakeup_device_flags(device); - /* - * Flags - * ----- - * Note that we only look for object handles -- cannot evaluate objects - * until we know the device is present and properly initialized. - */ - result = acpi_bus_get_flags(device); - if (result) - goto end; - - /* - * Initialize Device - * ----------------- - * TBD: Synch with Core's enumeration/initialization process. - */ - acpi_device_set_id(device); - - /* - * Power Management - * ---------------- - */ - if (device->flags.power_manageable) { - result = acpi_bus_get_power_flags(device); - if (result) - goto end; - } - - /* - * Wakeup device management - *----------------------- - */ - if (device->flags.wake_capable) { - result = acpi_bus_get_wakeup_device_flags(device); - if (result) - goto end; - } - - /* - * Performance Management - * ---------------------- - */ - if (device->flags.performance_manageable) { - result = acpi_bus_get_perf_flags(device); - if (result) - goto end; - } - - if ((result = acpi_device_set_context(device))) - goto end; - - result = acpi_device_register(device); - - /* - * Bind _ADR-Based Devices when hot add - */ - if (device->flags.bus_address) { - if (device->parent && device->parent->ops.bind) - device->parent->ops.bind(device); - } - -end: - if (!result) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Adding %s [%s] parent %s\n", dev_name(&device->dev), - (char *) buffer.pointer, - device->parent ? dev_name(&device->parent->dev) : - "(null)")); - kfree(buffer.pointer); - *child = device; - } else + result = acpi_device_add(device, acpi_device_release); + if (result) { acpi_device_release(&device->dev); + return result; + } - return result; + acpi_power_add_remove_device(device, true); + acpi_device_add_finalize(device); + acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", + dev_name(&device->dev), (char *) buffer.pointer, + device->parent ? dev_name(&device->parent->dev) : "(null)")); + kfree(buffer.pointer); + *child = device; + return 0; } -#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ - ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) - static int acpi_bus_type_and_status(acpi_handle handle, int *type, unsigned long long *sta) { @@ -1345,204 +1964,327 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type, return 0; } -static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, - void *context, void **return_value) +bool acpi_device_is_present(struct acpi_device *adev) +{ + if (adev->status.present || adev->status.functional) + return true; + + adev->flags.initialized = false; + return false; +} + +static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, + char *idstr, + const struct acpi_device_id **matchid) +{ + const struct acpi_device_id *devid; + + if (handler->match) + return handler->match(idstr, matchid); + + for (devid = handler->ids; devid->id[0]; devid++) + if (!strcmp((char *)devid->id, idstr)) { + if (matchid) + *matchid = devid; + + return true; + } + + return false; +} + +static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, + const struct acpi_device_id **matchid) { - struct acpi_bus_ops *ops = context; + struct acpi_scan_handler *handler; + + list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) + if (acpi_scan_handler_matching(handler, idstr, matchid)) + return handler; + + return NULL; +} + +void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) +{ + if (!!hotplug->enabled == !!val) + return; + + mutex_lock(&acpi_scan_lock); + + hotplug->enabled = val; + + mutex_unlock(&acpi_scan_lock); +} + +static void acpi_scan_init_hotplug(struct acpi_device *adev) +{ + struct acpi_hardware_id *hwid; + + if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { + acpi_dock_add(adev); + return; + } + list_for_each_entry(hwid, &adev->pnp.ids, list) { + struct acpi_scan_handler *handler; + + handler = acpi_scan_match_handler(hwid->id, NULL); + if (handler) { + adev->flags.hotplug_notify = true; + break; + } + } +} + +static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, + void *not_used, void **return_value) +{ + struct acpi_device *device = NULL; int type; unsigned long long sta; - struct acpi_device *device; - acpi_status status; int result; + acpi_bus_get_device(handle, &device); + if (device) + goto out; + result = acpi_bus_type_and_status(handle, &type, &sta); if (result) return AE_OK; - if (!(sta & ACPI_STA_DEVICE_PRESENT) && - !(sta & ACPI_STA_DEVICE_FUNCTIONING)) - return AE_CTRL_DEPTH; - - /* - * We may already have an acpi_device from a previous enumeration. If - * so, we needn't add it again, but we may still have to start it. - */ - device = NULL; - acpi_bus_get_device(handle, &device); - if (ops->acpi_op_add && !device) - acpi_add_single_object(&device, handle, type, sta, ops); + if (type == ACPI_BUS_TYPE_POWER) { + acpi_add_power_resource(handle); + return AE_OK; + } + acpi_add_single_object(&device, handle, type, sta); if (!device) return AE_CTRL_DEPTH; - if (ops->acpi_op_start && !(ops->acpi_op_add)) { - status = acpi_start_single_object(device); - if (ACPI_FAILURE(status)) - return AE_CTRL_DEPTH; - } + acpi_scan_init_hotplug(device); + out: if (!*return_value) *return_value = device; + return AE_OK; } -static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, - struct acpi_device **child) +static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) { - acpi_status status; - void *device = NULL; + bool *is_spi_i2c_slave_p = data; - status = acpi_bus_check_add(handle, 0, ops, &device); - if (ACPI_SUCCESS(status)) - acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, - acpi_bus_check_add, NULL, ops, &device); + if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) + return 1; - if (child) - *child = device; + /* + * devices that are connected to UART still need to be enumerated to + * platform bus + */ + if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) + *is_spi_i2c_slave_p = true; - if (device) - return 0; - else - return -ENODEV; + /* no need to do more checking */ + return -1; } -/* - * acpi_bus_add and acpi_bus_start - * - * scan a given ACPI tree and (probably recently hot-plugged) - * create and add or starts found devices. - * - * If no devices were found -ENODEV is returned which does not - * mean that this is a real error, there just have been no suitable - * ACPI objects in the table trunk from which the kernel could create - * a device and add/start an appropriate driver. - */ +static void acpi_default_enumeration(struct acpi_device *device) +{ + struct list_head resource_list; + bool is_spi_i2c_slave = false; + + if (!device->pnp.type.platform_id || device->handler) + return; -int -acpi_bus_add(struct acpi_device **child, - struct acpi_device *parent, acpi_handle handle, int type) + /* + * Do not enemerate SPI/I2C slaves as they will be enuerated by their + * respective parents. + */ + INIT_LIST_HEAD(&resource_list); + acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, + &is_spi_i2c_slave); + acpi_dev_free_resource_list(&resource_list); + if (!is_spi_i2c_slave) + acpi_create_platform_device(device); +} + +static int acpi_scan_attach_handler(struct acpi_device *device) { - struct acpi_bus_ops ops; + struct acpi_hardware_id *hwid; + int ret = 0; - memset(&ops, 0, sizeof(ops)); - ops.acpi_op_add = 1; + list_for_each_entry(hwid, &device->pnp.ids, list) { + const struct acpi_device_id *devid; + struct acpi_scan_handler *handler; - return acpi_bus_scan(handle, &ops, child); + handler = acpi_scan_match_handler(hwid->id, &devid); + if (handler) { + if (!handler->attach) { + device->pnp.type.platform_id = 0; + continue; + } + device->handler = handler; + ret = handler->attach(device, devid); + if (ret > 0) + break; + + device->handler = NULL; + if (ret < 0) + break; + } + } + if (!ret) + acpi_default_enumeration(device); + + return ret; } -EXPORT_SYMBOL(acpi_bus_add); -int acpi_bus_start(struct acpi_device *device) +static void acpi_bus_attach(struct acpi_device *device) { - struct acpi_bus_ops ops; - int result; + struct acpi_device *child; + acpi_handle ejd; + int ret; - if (!device) - return -EINVAL; + if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) + register_dock_dependent_device(device, ejd); - memset(&ops, 0, sizeof(ops)); - ops.acpi_op_start = 1; + acpi_bus_get_status(device); + /* Skip devices that are not present. */ + if (!acpi_device_is_present(device)) { + device->flags.visited = false; + return; + } + if (device->handler) + goto ok; - result = acpi_bus_scan(device->handle, &ops, NULL); + if (!device->flags.initialized) { + acpi_bus_update_power(device, NULL); + device->flags.initialized = true; + } + device->flags.visited = false; + ret = acpi_scan_attach_handler(device); + if (ret < 0) + return; - acpi_update_gpes(); + device->flags.match_driver = true; + if (!ret) { + ret = device_attach(&device->dev); + if (ret < 0) + return; + } + device->flags.visited = true; - return result; + ok: + list_for_each_entry(child, &device->children, node) + acpi_bus_attach(child); } -EXPORT_SYMBOL(acpi_bus_start); -int acpi_bus_trim(struct acpi_device *start, int rmdevice) +/** + * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. + * @handle: Root of the namespace scope to scan. + * + * Scan a given ACPI tree (probably recently hot-plugged) and create and add + * found devices. + * + * If no devices were found, -ENODEV is returned, but it does not mean that + * there has been a real error. There just have been no suitable ACPI objects + * in the table trunk from which the kernel could create a device and add an + * appropriate driver. + * + * Must be called under acpi_scan_lock. + */ +int acpi_bus_scan(acpi_handle handle) { - acpi_status status; - struct acpi_device *parent, *child; - acpi_handle phandle, chandle; - acpi_object_type type; - u32 level = 1; - int err = 0; + void *device = NULL; - parent = start; - phandle = start->handle; - child = chandle = NULL; + if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) + acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, + acpi_bus_check_add, NULL, NULL, &device); - while ((level > 0) && parent && (!err)) { - status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, - chandle, &chandle); + if (device) { + acpi_bus_attach(device); + return 0; + } + return -ENODEV; +} +EXPORT_SYMBOL(acpi_bus_scan); - /* - * If this scope is exhausted then move our way back up. - */ - if (ACPI_FAILURE(status)) { - level--; - chandle = phandle; - acpi_get_parent(phandle, &phandle); - child = parent; - parent = parent->parent; - - if (level == 0) - err = acpi_bus_remove(child, rmdevice); - else - err = acpi_bus_remove(child, 1); +/** + * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. + * @adev: Root of the ACPI namespace scope to walk. + * + * Must be called under acpi_scan_lock. + */ +void acpi_bus_trim(struct acpi_device *adev) +{ + struct acpi_scan_handler *handler = adev->handler; + struct acpi_device *child; - continue; - } + list_for_each_entry_reverse(child, &adev->children, node) + acpi_bus_trim(child); - status = acpi_get_type(chandle, &type); - if (ACPI_FAILURE(status)) { - continue; - } - /* - * If there is a device corresponding to chandle then - * parse it (depth-first). - */ - if (acpi_bus_get_device(chandle, &child) == 0) { - level++; - phandle = chandle; - chandle = NULL; - parent = child; - } - continue; + adev->flags.match_driver = false; + if (handler) { + if (handler->detach) + handler->detach(adev); + + adev->handler = NULL; + } else { + device_release_driver(&adev->dev); } - return err; + /* + * Most likely, the device is going away, so put it into D3cold before + * that. + */ + acpi_device_set_power(adev, ACPI_STATE_D3_COLD); + adev->flags.initialized = false; + adev->flags.visited = false; } EXPORT_SYMBOL_GPL(acpi_bus_trim); static int acpi_bus_scan_fixed(void) { int result = 0; - struct acpi_device *device = NULL; - struct acpi_bus_ops ops; - - memset(&ops, 0, sizeof(ops)); - ops.acpi_op_add = 1; - ops.acpi_op_start = 1; /* * Enumerate all fixed-feature devices. */ - if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { + if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { + struct acpi_device *device = NULL; + result = acpi_add_single_object(&device, NULL, ACPI_BUS_TYPE_POWER_BUTTON, - ACPI_STA_DEFAULT, - &ops); + ACPI_STA_DEFAULT); + if (result) + return result; + + device->flags.match_driver = true; + result = device_attach(&device->dev); + if (result < 0) + return result; + + device_init_wakeup(&device->dev, true); } - if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { + if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { + struct acpi_device *device = NULL; + result = acpi_add_single_object(&device, NULL, ACPI_BUS_TYPE_SLEEP_BUTTON, - ACPI_STA_DEFAULT, - &ops); + ACPI_STA_DEFAULT); + if (result) + return result; + + device->flags.match_driver = true; + result = device_attach(&device->dev); } - return result; + return result < 0 ? result : 0; } int __init acpi_scan_init(void) { int result; - struct acpi_bus_ops ops; - - memset(&ops, 0, sizeof(ops)); - ops.acpi_op_add = 1; - ops.acpi_op_start = 1; result = bus_register(&acpi_bus_type); if (result) { @@ -1550,18 +2292,42 @@ int __init acpi_scan_init(void) printk(KERN_ERR PREFIX "Could not register bus type\n"); } + acpi_pci_root_init(); + acpi_pci_link_init(); + acpi_processor_init(); + acpi_lpss_init(); + acpi_cmos_rtc_init(); + acpi_container_init(); + acpi_memory_hotplug_init(); + acpi_pnp_init(); + + mutex_lock(&acpi_scan_lock); /* * Enumerate devices in the ACPI namespace. */ - result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); + result = acpi_bus_scan(ACPI_ROOT_OBJECT); + if (result) + goto out; + + result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); + if (result) + goto out; - if (!result) + /* Fixed feature devices do not exist on HW-reduced platform */ + if (!acpi_gbl_reduced_hardware) { result = acpi_bus_scan_fixed(); + if (result) { + acpi_detach_data(acpi_root->handle, + acpi_scan_drop_device); + acpi_device_del(acpi_root); + put_device(&acpi_root->dev); + goto out; + } + } - if (result) - acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); - else - acpi_update_gpes(); + acpi_update_all_gpes(); + out: + mutex_unlock(&acpi_scan_lock); return result; } |