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Diffstat (limited to 'include/linux/mdev.h')
-rw-r--r--include/linux/mdev.h77
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 */