| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef S390_CCWGROUP_H |
| 3 | #define S390_CCWGROUP_H |
| 4 | |
| 5 | struct ccw_device; |
| 6 | struct ccw_driver; |
| 7 | |
| 8 | /** |
| 9 | * struct ccwgroup_device - ccw group device |
| 10 | * @state: online/offline state |
| 11 | * @count: number of attached slave devices |
| 12 | * @dev: embedded device structure |
| 13 | * @cdev: variable number of slave devices, allocated as needed |
| 14 | * @ungroup_work: work to be done when a ccwgroup notifier has action |
| 15 | * type %BUS_NOTIFY_UNBIND_DRIVER |
| 16 | */ |
| 17 | struct ccwgroup_device { |
| 18 | enum { |
| 19 | CCWGROUP_OFFLINE, |
| 20 | CCWGROUP_ONLINE, |
| 21 | } state; |
| 22 | /* private: */ |
| 23 | atomic_t onoff; |
| 24 | struct mutex reg_mutex; |
| 25 | /* public: */ |
| 26 | unsigned int count; |
| 27 | struct device dev; |
| 28 | struct work_struct ungroup_work; |
| 29 | struct ccw_device *cdev[0]; |
| 30 | }; |
| 31 | |
| 32 | /** |
| 33 | * struct ccwgroup_driver - driver for ccw group devices |
| 34 | * @setup: function called during device creation to setup the device |
| 35 | * @remove: function called on remove |
| 36 | * @set_online: function called when device is set online |
| 37 | * @set_offline: function called when device is set offline |
| 38 | * @shutdown: function called when device is shut down |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 39 | * @driver: embedded driver structure |
| 40 | * @ccw_driver: supported ccw_driver (optional) |
| 41 | */ |
| 42 | struct ccwgroup_driver { |
| 43 | int (*setup) (struct ccwgroup_device *); |
| 44 | void (*remove) (struct ccwgroup_device *); |
| 45 | int (*set_online) (struct ccwgroup_device *); |
| 46 | int (*set_offline) (struct ccwgroup_device *); |
| 47 | void (*shutdown)(struct ccwgroup_device *); |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 48 | |
| 49 | struct device_driver driver; |
| 50 | struct ccw_driver *ccw_driver; |
| 51 | }; |
| 52 | |
| 53 | extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver); |
| 54 | extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver); |
| 55 | int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv, |
| 56 | int num_devices, const char *buf); |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 57 | struct ccwgroup_device *get_ccwgroupdev_by_busid(struct ccwgroup_driver *gdrv, |
| 58 | char *bus_id); |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 59 | |
| 60 | extern int ccwgroup_set_online(struct ccwgroup_device *gdev); |
| 61 | extern int ccwgroup_set_offline(struct ccwgroup_device *gdev); |
| 62 | |
| 63 | extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev); |
| 64 | extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev); |
| 65 | |
| 66 | #define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev) |
| 67 | #define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver) |
| 68 | |
| 69 | #if IS_ENABLED(CONFIG_CCWGROUP) |
| 70 | bool dev_is_ccwgroup(struct device *dev); |
| 71 | #else /* CONFIG_CCWGROUP */ |
| 72 | static inline bool dev_is_ccwgroup(struct device *dev) |
| 73 | { |
| 74 | return false; |
| 75 | } |
| 76 | #endif /* CONFIG_CCWGROUP */ |
| 77 | |
| 78 | #endif |