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75 lines
2.2 KiB
75 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef S390_CCWGROUP_H |
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#define S390_CCWGROUP_H |
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struct ccw_device; |
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struct ccw_driver; |
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/** |
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* struct ccwgroup_device - ccw group device |
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* @state: online/offline state |
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* @count: number of attached slave devices |
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* @dev: embedded device structure |
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* @cdev: variable number of slave devices, allocated as needed |
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* @ungroup_work: used to ungroup the ccwgroup device |
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*/ |
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struct ccwgroup_device { |
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enum { |
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CCWGROUP_OFFLINE, |
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CCWGROUP_ONLINE, |
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} state; |
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/* private: */ |
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atomic_t onoff; |
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struct mutex reg_mutex; |
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/* public: */ |
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unsigned int count; |
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struct device dev; |
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struct work_struct ungroup_work; |
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struct ccw_device *cdev[]; |
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}; |
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/** |
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* struct ccwgroup_driver - driver for ccw group devices |
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* @setup: function called during device creation to setup the device |
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* @remove: function called on remove |
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* @set_online: function called when device is set online |
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* @set_offline: function called when device is set offline |
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* @shutdown: function called when device is shut down |
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* @driver: embedded driver structure |
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* @ccw_driver: supported ccw_driver (optional) |
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*/ |
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struct ccwgroup_driver { |
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int (*setup) (struct ccwgroup_device *); |
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void (*remove) (struct ccwgroup_device *); |
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int (*set_online) (struct ccwgroup_device *); |
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int (*set_offline) (struct ccwgroup_device *); |
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void (*shutdown)(struct ccwgroup_device *); |
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struct device_driver driver; |
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struct ccw_driver *ccw_driver; |
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}; |
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extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver); |
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extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver); |
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int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv, |
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int num_devices, const char *buf); |
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extern int ccwgroup_set_online(struct ccwgroup_device *gdev); |
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int ccwgroup_set_offline(struct ccwgroup_device *gdev, bool call_gdrv); |
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extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev); |
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extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev); |
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#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev) |
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#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver) |
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#if IS_ENABLED(CONFIG_CCWGROUP) |
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bool dev_is_ccwgroup(struct device *dev); |
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#else /* CONFIG_CCWGROUP */ |
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static inline bool dev_is_ccwgroup(struct device *dev) |
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{ |
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return false; |
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} |
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#endif /* CONFIG_CCWGROUP */ |
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#endif
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