* scan.c - support for transforming the ACPI namespace into individual objects
*/
+#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
-#include <linux/module.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */
#define ACPI_BUS_DEVICE_NAME "System Bus"
static LIST_HEAD(acpi_device_list);
-spinlock_t acpi_device_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_SPINLOCK(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
+static int
+acpi_bus_trim(struct acpi_device *start,
+ int rmdevice);
+
static void acpi_device_release(struct kobject * kobj)
{
struct acpi_device * dev = container_of(kobj,struct acpi_device,kobj);
kfree(dev);
}
+struct acpi_device_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct acpi_device *, char *);
+ ssize_t (*store)(struct acpi_device *, const char *, size_t);
+};
+
+typedef void acpi_device_sysfs_files(struct kobject *,
+ const struct attribute *);
+
+static void setup_sys_fs_device_files(struct acpi_device *dev,
+ acpi_device_sysfs_files *func);
+
+#define create_sysfs_device_files(dev) \
+ setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_create_file)
+#define remove_sysfs_device_files(dev) \
+ setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_remove_file)
+
+
+#define to_acpi_device(n) container_of(n, struct acpi_device, kobj)
+#define to_handle_attr(n) container_of(n, struct acpi_device_attribute, attr);
+
+static ssize_t acpi_device_attr_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct acpi_device *device = to_acpi_device(kobj);
+ struct acpi_device_attribute *attribute = to_handle_attr(attr);
+ return attribute->show ? attribute->show(device, buf) : 0;
+}
+static ssize_t acpi_device_attr_store(struct kobject *kobj,
+ struct attribute *attr, const char *buf, size_t len)
+{
+ struct acpi_device *device = to_acpi_device(kobj);
+ struct acpi_device_attribute *attribute = to_handle_attr(attr);
+ return attribute->store ? attribute->store(device, buf, len) : len;
+}
+
+static struct sysfs_ops acpi_device_sysfs_ops = {
+ .show = acpi_device_attr_show,
+ .store = acpi_device_attr_store,
+};
+
static struct kobj_type ktype_acpi_ns = {
+ .sysfs_ops = &acpi_device_sysfs_ops,
.release = acpi_device_release,
};
+static int namespace_hotplug(struct kset *kset, struct kobject *kobj,
+ char **envp, int num_envp, char *buffer,
+ int buffer_size)
+{
+ struct acpi_device *dev = to_acpi_device(kobj);
+ int i = 0;
+ int len = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ if (add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size, &len,
+ "PHYSDEVDRIVER=%s", dev->driver->name))
+ return -ENOMEM;
+
+ envp[i] = NULL;
+
+ return 0;
+}
+
+static struct kset_hotplug_ops namespace_hotplug_ops = {
+ .hotplug = &namespace_hotplug,
+};
+
static struct kset acpi_namespace_kset = {
.kobj = {
.name = "namespace",
},
.subsys = &acpi_subsys,
.ktype = &ktype_acpi_ns,
+ .hotplug_ops = &namespace_hotplug_ops,
};
INIT_LIST_HEAD(&device->children);
INIT_LIST_HEAD(&device->node);
INIT_LIST_HEAD(&device->g_list);
+ INIT_LIST_HEAD(&device->wakeup_list);
spin_lock(&acpi_device_lock);
if (device->parent) {
list_add_tail(&device->g_list,&device->parent->g_list);
} else
list_add_tail(&device->g_list,&acpi_device_list);
+ if (device->wakeup.flags.valid)
+ list_add_tail(&device->wakeup_list,&acpi_wakeup_device_list);
spin_unlock(&acpi_device_lock);
- kobject_init(&device->kobj);
strlcpy(device->kobj.name,device->pnp.bus_id,KOBJ_NAME_LEN);
if (parent)
device->kobj.parent = &parent->kobj;
device->kobj.ktype = &ktype_acpi_ns;
device->kobj.kset = &acpi_namespace_kset;
- kobject_add(&device->kobj);
+ kobject_register(&device->kobj);
+ create_sysfs_device_files(device);
}
static int
struct acpi_device *device,
int type)
{
+ spin_lock(&acpi_device_lock);
+ if (device->parent) {
+ list_del(&device->node);
+ list_del(&device->g_list);
+ } else
+ list_del(&device->g_list);
+
+ list_del(&device->wakeup_list);
+
+ spin_unlock(&acpi_device_lock);
+
+ acpi_detach_data(device->handle, acpi_bus_data_handler);
+ remove_sysfs_device_files(device);
kobject_unregister(&device->kobj);
return 0;
}
if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E"))
device->wakeup.flags.run_wake = 1;
- /* TBD: lock */
- INIT_LIST_HEAD(&device->wakeup_list);
- spin_lock(&acpi_device_lock);
- list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
- spin_unlock(&acpi_device_lock);
-
end:
if (ACPI_FAILURE(status))
device->flags.wake_capable = 0;
return_VALUE(0);
}
+/* --------------------------------------------------------------------------
+ ACPI hotplug sysfs device file support
+ -------------------------------------------------------------------------- */
+static ssize_t acpi_eject_store(struct acpi_device *device,
+ const char *buf, size_t count);
+
+#define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \
+static struct acpi_device_attribute acpi_device_attr_##_name = \
+ __ATTR(_name, _mode, _show, _store)
+
+ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
+
+/**
+ * setup_sys_fs_device_files - sets up the device files under device namespace
+ * @dev: acpi_device object
+ * @func: function pointer to create or destroy the device file
+ */
+static void
+setup_sys_fs_device_files (
+ struct acpi_device *dev,
+ acpi_device_sysfs_files *func)
+{
+ acpi_status status;
+ acpi_handle temp = NULL;
+
+ /*
+ * 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))
+ (*(func))(&dev->kobj,&acpi_device_attr_eject.attr);
+}
+
+static int
+acpi_eject_operation(acpi_handle handle, int lockable)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status = AE_OK;
+
+ /*
+ * TBD: evaluate _PS3?
+ */
+
+ if (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);
+ }
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = 1;
+
+ /*
+ * TBD: _EJD support.
+ */
+
+ status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
+ if (ACPI_FAILURE(status)) {
+ return(-ENODEV);
+ }
+
+ return(0);
+}
+
+
+static ssize_t
+acpi_eject_store(struct acpi_device *device, const char *buf, size_t count)
+{
+ int result;
+ int ret = count;
+ int islockable;
+ acpi_status status;
+ acpi_handle handle;
+ acpi_object_type type = 0;
+
+ if ((!count) || (buf[0] != '1')) {
+ return -EINVAL;
+ }
+
+#ifndef FORCE_EJECT
+ if (device->driver == NULL) {
+ ret = -ENODEV;
+ goto err;
+ }
+#endif
+ status = acpi_get_type(device->handle, &type);
+ if (ACPI_FAILURE(status) || (!device->flags.ejectable) ) {
+ ret = -ENODEV;
+ goto err;
+ }
+
+ islockable = device->flags.lockable;
+ handle = device->handle;
+
+ if (type == ACPI_TYPE_PROCESSOR)
+ result = acpi_bus_trim(device, 0);
+ else
+ result = acpi_bus_trim(device, 1);
+
+ if (!result)
+ result = acpi_eject_operation(handle, islockable);
+
+ if (result) {
+ ret = -EBUSY;
+ }
+err:
+ return ret;
+}
+
+
/* --------------------------------------------------------------------------
Performance Management
-------------------------------------------------------------------------- */
acpi_os_free(buffer.pointer);
}
-int acpi_device_set_context(struct acpi_device * device, int type)
+static int acpi_device_set_context(struct acpi_device * device, int type)
{
acpi_status status = AE_OK;
int result = 0;
return result;
}
-void acpi_device_get_debug_info(struct acpi_device * device, acpi_handle handle, int type)
+static void acpi_device_get_debug_info(struct acpi_device * device, acpi_handle handle, int type)
{
#ifdef CONFIG_ACPI_DEBUG_OUTPUT
char *type_string = NULL;
char name[80] = {'?','\0'};
- acpi_buffer buffer = {sizeof(name), name};
+ struct acpi_buffer buffer = {sizeof(name), name};
switch (type) {
case ACPI_BUS_TYPE_DEVICE:
#endif /*CONFIG_ACPI_DEBUG_OUTPUT*/
}
-int
+
+static int
+acpi_bus_remove (
+ struct acpi_device *dev,
+ int rmdevice)
+{
+ int result = 0;
+ struct acpi_driver *driver;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_remove");
+
+ if (!dev)
+ return_VALUE(-EINVAL);
+
+ driver = dev->driver;
+
+ if ((driver) && (driver->ops.remove)) {
+
+ if (driver->ops.stop) {
+ result = driver->ops.stop(dev, ACPI_BUS_REMOVAL_EJECT);
+ if (result)
+ return_VALUE(result);
+ }
+
+ result = dev->driver->ops.remove(dev, ACPI_BUS_REMOVAL_EJECT);
+ if (result) {
+ return_VALUE(result);
+ }
+
+ atomic_dec(&dev->driver->references);
+ dev->driver = NULL;
+ acpi_driver_data(dev) = NULL;
+ }
+
+ if (!rmdevice)
+ return_VALUE(0);
+
+ 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);
+
+ return_VALUE(0);
+}
+
+
+int
acpi_bus_add (
struct acpi_device **child,
struct acpi_device *parent,
EXPORT_SYMBOL(acpi_bus_add);
-static int acpi_bus_scan (struct acpi_device *start)
+int acpi_bus_scan (struct acpi_device *start)
{
acpi_status status = AE_OK;
struct acpi_device *parent = NULL;
EXPORT_SYMBOL(acpi_bus_scan);
+static int
+acpi_bus_trim(struct acpi_device *start,
+ int rmdevice)
+{
+ acpi_status status;
+ struct acpi_device *parent, *child;
+ acpi_handle phandle, chandle;
+ acpi_object_type type;
+ u32 level = 1;
+ int err = 0;
+
+ parent = start;
+ phandle = start->handle;
+ child = chandle = NULL;
+
+ while ((level > 0) && parent && (!err)) {
+ status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
+ chandle, &chandle);
+
+ /*
+ * 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);
+
+ continue;
+ }
+
+ 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;
+ }
+ return err;
+}
+
static int
acpi_bus_scan_fixed (
struct acpi_device *root)
git://git.onelab.eu / linux-2.6.git / blobdiff