From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/s390/include/asm/ccwgroup.h | 75 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 arch/s390/include/asm/ccwgroup.h (limited to 'arch/s390/include/asm/ccwgroup.h') diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h new file mode 100644 index 0000000000..11d2fb3de4 --- /dev/null +++ b/arch/s390/include/asm/ccwgroup.h @@ -0,0 +1,75 @@ +/* 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: used to ungroup the ccwgroup device + */ +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[]; +}; + +/** + * 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 + * @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 *); + + 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); + +extern int ccwgroup_set_online(struct ccwgroup_device *gdev); +int ccwgroup_set_offline(struct ccwgroup_device *gdev, bool call_gdrv); + +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 -- cgit v1.2.3