ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/s390/include/asm/ccwgroup.h b/marvell/linux/arch/s390/include/asm/ccwgroup.h
new file mode 100644
index 0000000..7293c13
--- /dev/null
+++ b/marvell/linux/arch/s390/include/asm/ccwgroup.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef S390_CCWGROUP_H
+#define S390_CCWGROUP_H
+
+struct ccw_device;
+struct ccw_driver;
+
+/**
+ * struct ccwgroup_device - ccw group device
+ * @state: online/offline state
+ * @count: number of attached slave devices
+ * @dev: embedded device structure
+ * @cdev: variable number of slave devices, allocated as needed
+ * @ungroup_work: work to be done when a ccwgroup notifier has action
+ * type %BUS_NOTIFY_UNBIND_DRIVER
+ */
+struct ccwgroup_device {
+ enum {
+ CCWGROUP_OFFLINE,
+ CCWGROUP_ONLINE,
+ } state;
+/* private: */
+ atomic_t onoff;
+ struct mutex reg_mutex;
+/* public: */
+ unsigned int count;
+ struct device dev;
+ struct work_struct ungroup_work;
+ struct ccw_device *cdev[0];
+};
+
+/**
+ * struct ccwgroup_driver - driver for ccw group devices
+ * @setup: function called during device creation to setup the device
+ * @remove: function called on remove
+ * @set_online: function called when device is set online
+ * @set_offline: function called when device is set offline
+ * @shutdown: function called when device is shut down
+ * @prepare: prepare for pm state transition
+ * @complete: undo work done in @prepare
+ * @freeze: callback for freezing during hibernation snapshotting
+ * @thaw: undo work done in @freeze
+ * @restore: callback for restoring after hibernation
+ * @driver: embedded driver structure
+ * @ccw_driver: supported ccw_driver (optional)
+ */
+struct ccwgroup_driver {
+ int (*setup) (struct ccwgroup_device *);
+ void (*remove) (struct ccwgroup_device *);
+ int (*set_online) (struct ccwgroup_device *);
+ int (*set_offline) (struct ccwgroup_device *);
+ void (*shutdown)(struct ccwgroup_device *);
+ int (*prepare) (struct ccwgroup_device *);
+ void (*complete) (struct ccwgroup_device *);
+ int (*freeze)(struct ccwgroup_device *);
+ int (*thaw) (struct ccwgroup_device *);
+ int (*restore)(struct ccwgroup_device *);
+
+ struct device_driver driver;
+ struct ccw_driver *ccw_driver;
+};
+
+extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver);
+extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
+int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
+ int num_devices, const char *buf);
+struct ccwgroup_device *get_ccwgroupdev_by_busid(struct ccwgroup_driver *gdrv,
+ char *bus_id);
+
+extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
+extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
+
+extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
+extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);
+
+#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)
+#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)
+
+#if IS_ENABLED(CONFIG_CCWGROUP)
+bool dev_is_ccwgroup(struct device *dev);
+#else /* CONFIG_CCWGROUP */
+static inline bool dev_is_ccwgroup(struct device *dev)
+{
+ return false;
+}
+#endif /* CONFIG_CCWGROUP */
+
+#endif