cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ccwgroup.h (2300B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef S390_CCWGROUP_H
      3#define S390_CCWGROUP_H
      4
      5struct ccw_device;
      6struct 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: used to ungroup the ccwgroup device
     15 */
     16struct ccwgroup_device {
     17	enum {
     18		CCWGROUP_OFFLINE,
     19		CCWGROUP_ONLINE,
     20	} state;
     21/* private: */
     22	atomic_t onoff;
     23	struct mutex reg_mutex;
     24/* public: */
     25	unsigned int count;
     26	struct device	dev;
     27	struct work_struct ungroup_work;
     28	struct ccw_device *cdev[];
     29};
     30
     31/**
     32 * struct ccwgroup_driver - driver for ccw group devices
     33 * @setup: function called during device creation to setup the device
     34 * @remove: function called on remove
     35 * @set_online: function called when device is set online
     36 * @set_offline: function called when device is set offline
     37 * @shutdown: function called when device is shut down
     38 * @driver: embedded driver structure
     39 * @ccw_driver: supported ccw_driver (optional)
     40 */
     41struct ccwgroup_driver {
     42	int (*setup) (struct ccwgroup_device *);
     43	void (*remove) (struct ccwgroup_device *);
     44	int (*set_online) (struct ccwgroup_device *);
     45	int (*set_offline) (struct ccwgroup_device *);
     46	void (*shutdown)(struct ccwgroup_device *);
     47
     48	struct device_driver driver;
     49	struct ccw_driver *ccw_driver;
     50};
     51
     52extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
     53extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
     54int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
     55			int num_devices, const char *buf);
     56
     57extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
     58int ccwgroup_set_offline(struct ccwgroup_device *gdev, bool call_gdrv);
     59
     60extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
     61extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);
     62
     63#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)
     64#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)
     65
     66#if IS_ENABLED(CONFIG_CCWGROUP)
     67bool dev_is_ccwgroup(struct device *dev);
     68#else /* CONFIG_CCWGROUP */
     69static inline bool dev_is_ccwgroup(struct device *dev)
     70{
     71	return false;
     72}
     73#endif /* CONFIG_CCWGROUP */
     74
     75#endif