1 files changed, 40 insertions, 37 deletions

diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index 47ad3b104d9e..139d05b26f82 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -10,6 +10,9 @@
 #ifndef MDEV_H
 #define MDEV_H
 
+#include <linux/device.h>
+#include <linux/uuid.h>
+
 struct mdev_type;
 
 struct mdev_device {
@@ -20,67 +23,67 @@ struct mdev_device {
 	bool active;
 };
 
-static inline struct mdev_device *to_mdev_device(struct device *dev)
-{
-	return container_of(dev, struct mdev_device, dev);
-}
+struct mdev_type {
+	/* set by the driver before calling mdev_register parent: */
+	const char *sysfs_name;
+	const char *pretty_name;
 
-unsigned int mdev_get_type_group_id(struct mdev_device *mdev);
-unsigned int mtype_get_type_group_id(struct mdev_type *mtype);
-struct device *mtype_get_parent_dev(struct mdev_type *mtype);
+	/* set by the core, can be used drivers */
+	struct mdev_parent *parent;
 
-/* interface for exporting mdev supported type attributes */
-struct mdev_type_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct mdev_type *mtype,
-			struct mdev_type_attribute *attr, char *buf);
-	ssize_t (*store)(struct mdev_type *mtype,
-			 struct mdev_type_attribute *attr, const char *buf,
-			 size_t count);
+	/* internal only */
+	struct kobject kobj;
+	struct kobject *devices_kobj;
 };
 
-#define MDEV_TYPE_ATTR(_name, _mode, _show, _store)		\
-struct mdev_type_attribute mdev_type_attr_##_name =		\
-	__ATTR(_name, _mode, _show, _store)
-#define MDEV_TYPE_ATTR_RW(_name) \
-	struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RW(_name)
-#define MDEV_TYPE_ATTR_RO(_name) \
-	struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RO(_name)
-#define MDEV_TYPE_ATTR_WO(_name) \
-	struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_WO(_name)
+/* embedded into the struct device that the mdev devices hang off */
+struct mdev_parent {
+	struct device *dev;
+	struct mdev_driver *mdev_driver;
+	struct kset *mdev_types_kset;
+	/* Synchronize device creation/removal with parent unregistration */
+	struct rw_semaphore unreg_sem;
+	struct mdev_type **types;
+	unsigned int nr_types;
+	atomic_t available_instances;
+};
+
+static inline struct mdev_device *to_mdev_device(struct device *dev)
+{
+	return container_of(dev, struct mdev_device, dev);
+}
 
 /**
  * struct mdev_driver - Mediated device driver
+ * @device_api: string to return for the device_api sysfs
+ * @max_instances: maximum number of instances supported (optional)
  * @probe: called when new device created
  * @remove: called when device removed
- * @supported_type_groups: Attributes to define supported types. It is mandatory
- *			to provide supported types.
+ * @get_available: Return the max number of instances that can be created
+ * @show_description: Print a description of the mtype
  * @driver: device driver structure
- *
  **/
 struct mdev_driver {
+	const char *device_api;
+	unsigned int max_instances;
 	int (*probe)(struct mdev_device *dev);
 	void (*remove)(struct mdev_device *dev);
-	struct attribute_group **supported_type_groups;
+	unsigned int (*get_available)(struct mdev_type *mtype);
+	ssize_t (*show_description)(struct mdev_type *mtype, char *buf);
 	struct device_driver driver;
 };
 
-extern struct bus_type mdev_bus_type;
-
-int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver);
-void mdev_unregister_device(struct device *dev);
+int mdev_register_parent(struct mdev_parent *parent, struct device *dev,
+		struct mdev_driver *mdev_driver, struct mdev_type **types,
+		unsigned int nr_types);
+void mdev_unregister_parent(struct mdev_parent *parent);
 
 int mdev_register_driver(struct mdev_driver *drv);
 void mdev_unregister_driver(struct mdev_driver *drv);
 
-struct device *mdev_parent_dev(struct mdev_device *mdev);
 static inline struct device *mdev_dev(struct mdev_device *mdev)
 {
 	return &mdev->dev;
 }
-static inline struct mdev_device *mdev_from_dev(struct device *dev)
-{
-	return dev->bus == &mdev_bus_type ? to_mdev_device(dev) : NULL;
-}
 
 #endif /* MDEV_H */