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path: root/drivers/acpi/glue.c
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Diffstat (limited to 'drivers/acpi/glue.c')
-rw-r--r--drivers/acpi/glue.c135
1 files changed, 86 insertions, 49 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)