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usr
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src
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linux-headers-6.8.0-83-generic
/
arch
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s390
/
include
/
asm
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drwxr-xr-x
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ccwdev.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright IBM Corp. 2002, 2009 * * Author(s): Arnd Bergmann <arndb@de.ibm.com> * * Interface for CCW device drivers */ #ifndef _S390_CCWDEV_H_ #define _S390_CCWDEV_H_ #include <linux/device.h> #include <linux/mod_devicetable.h> #include <asm/chsc.h> #include <asm/fcx.h> #include <asm/irq.h> #include <asm/schid.h> #include <linux/mutex.h> /* structs from asm/cio.h */ struct irb; struct ccw1; struct ccw_dev_id; /* simplified initializers for struct ccw_device: * CCW_DEVICE and CCW_DEVICE_DEVTYPE initialize one * entry in your MODULE_DEVICE_TABLE and set the match_flag correctly */ #define CCW_DEVICE(cu, cum) \ .cu_type=(cu), .cu_model=(cum), \ .match_flags=(CCW_DEVICE_ID_MATCH_CU_TYPE \ | (cum ? CCW_DEVICE_ID_MATCH_CU_MODEL : 0)) #define CCW_DEVICE_DEVTYPE(cu, cum, dev, devm) \ .cu_type=(cu), .cu_model=(cum), .dev_type=(dev), .dev_model=(devm),\ .match_flags=CCW_DEVICE_ID_MATCH_CU_TYPE \ | ((cum) ? CCW_DEVICE_ID_MATCH_CU_MODEL : 0) \ | CCW_DEVICE_ID_MATCH_DEVICE_TYPE \ | ((devm) ? CCW_DEVICE_ID_MATCH_DEVICE_MODEL : 0) /* scan through an array of device ids and return the first * entry that matches the device. * * the array must end with an entry containing zero match_flags */ static inline const struct ccw_device_id * ccw_device_id_match(const struct ccw_device_id *array, const struct ccw_device_id *match) { const struct ccw_device_id *id = array; for (id = array; id->match_flags; id++) { if ((id->match_flags & CCW_DEVICE_ID_MATCH_CU_TYPE) && (id->cu_type != match->cu_type)) continue; if ((id->match_flags & CCW_DEVICE_ID_MATCH_CU_MODEL) && (id->cu_model != match->cu_model)) continue; if ((id->match_flags & CCW_DEVICE_ID_MATCH_DEVICE_TYPE) && (id->dev_type != match->dev_type)) continue; if ((id->match_flags & CCW_DEVICE_ID_MATCH_DEVICE_MODEL) && (id->dev_model != match->dev_model)) continue; return id; } return NULL; } /** * struct ccw_device - channel attached device * @ccwlock: pointer to device lock * @id: id of this device * @drv: ccw driver for this device * @dev: embedded device structure * @online: online status of device * @handler: interrupt handler * * @handler is a member of the device rather than the driver since a driver * can have different interrupt handlers for different ccw devices * (multi-subchannel drivers). */ struct ccw_device { spinlock_t *ccwlock; /* private: */ struct ccw_device_private *private; /* cio private information */ struct mutex reg_mutex; /* public: */ struct ccw_device_id id; struct ccw_driver *drv; struct device dev; int online; void (*handler) (struct ccw_device *, unsigned long, struct irb *); }; /* * Possible events used by the path_event notifier. */ #define PE_NONE 0x0 #define PE_PATH_GONE 0x1 /* A path is no longer available. */ #define PE_PATH_AVAILABLE 0x2 /* A path has become available and was successfully verified. */ #define PE_PATHGROUP_ESTABLISHED 0x4 /* A pathgroup was reset and had to be established again. */ #define PE_PATH_FCES_EVENT 0x8 /* The FCES Status of a path has * changed. */ /* * Possible CIO actions triggered by the unit check handler. */ enum uc_todo { UC_TODO_RETRY, UC_TODO_RETRY_ON_NEW_PATH, UC_TODO_STOP }; /** * struct ccw_driver - device driver for channel attached devices * @ids: ids supported by this driver * @probe: function called on probe * @remove: function called on remove * @set_online: called when setting device online * @set_offline: called when setting device offline * @notify: notify driver of device state changes * @path_event: notify driver of channel path events * @shutdown: called at device shutdown * @uc_handler: callback for unit check handler * @driver: embedded device driver structure * @int_class: interruption class to use for accounting interrupts */ struct ccw_driver { struct ccw_device_id *ids; int (*probe) (struct ccw_device *); void (*remove) (struct ccw_device *); int (*set_online) (struct ccw_device *); int (*set_offline) (struct ccw_device *); int (*notify) (struct ccw_device *, int); void (*path_event) (struct ccw_device *, int *); void (*shutdown) (struct ccw_device *); enum uc_todo (*uc_handler) (struct ccw_device *, struct irb *); struct device_driver driver; enum interruption_class int_class; }; extern struct ccw_device *get_ccwdev_by_busid(struct ccw_driver *cdrv, const char *bus_id); /* devices drivers call these during module load and unload. * When a driver is registered, its probe method is called * when new devices for its type pop up */ extern int ccw_driver_register (struct ccw_driver *driver); extern void ccw_driver_unregister (struct ccw_driver *driver); extern int ccw_device_set_options_mask(struct ccw_device *, unsigned long); extern int ccw_device_set_options(struct ccw_device *, unsigned long); extern void ccw_device_clear_options(struct ccw_device *, unsigned long); int ccw_device_is_pathgroup(struct ccw_device *cdev); int ccw_device_is_multipath(struct ccw_device *cdev); /* Allow for i/o completion notification after primary interrupt status. */ #define CCWDEV_EARLY_NOTIFICATION 0x0001 /* Report all interrupt conditions. */ #define CCWDEV_REPORT_ALL 0x0002 /* Try to perform path grouping. */ #define CCWDEV_DO_PATHGROUP 0x0004 /* Allow forced onlining of boxed devices. */ #define CCWDEV_ALLOW_FORCE 0x0008 /* Try to use multipath mode. */ #define CCWDEV_DO_MULTIPATH 0x0010 extern int ccw_device_start(struct ccw_device *, struct ccw1 *, unsigned long, __u8, unsigned long); extern int ccw_device_start_timeout(struct ccw_device *, struct ccw1 *, unsigned long, __u8, unsigned long, int); extern int ccw_device_start_key(struct ccw_device *, struct ccw1 *, unsigned long, __u8, __u8, unsigned long); extern int ccw_device_start_timeout_key(struct ccw_device *, struct ccw1 *, unsigned long, __u8, __u8, unsigned long, int); extern int ccw_device_resume(struct ccw_device *); extern int ccw_device_halt(struct ccw_device *, unsigned long); extern int ccw_device_clear(struct ccw_device *, unsigned long); int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw, unsigned long intparm, u8 lpm, u8 key); int ccw_device_tm_start_key(struct ccw_device *, struct tcw *, unsigned long, u8, u8); int ccw_device_tm_start_timeout_key(struct ccw_device *, struct tcw *, unsigned long, u8, u8, int); int ccw_device_tm_start(struct ccw_device *, struct tcw *, unsigned long, u8); int ccw_device_tm_start_timeout(struct ccw_device *, struct tcw *, unsigned long, u8, int); int ccw_device_tm_intrg(struct ccw_device *cdev); int ccw_device_get_mdc(struct ccw_device *cdev, u8 mask); extern int ccw_device_set_online(struct ccw_device *cdev); extern int ccw_device_set_offline(struct ccw_device *cdev); extern struct ciw *ccw_device_get_ciw(struct ccw_device *, __u32 cmd); extern __u8 ccw_device_get_path_mask(struct ccw_device *); extern void ccw_device_get_id(struct ccw_device *, struct ccw_dev_id *); #define get_ccwdev_lock(x) (x)->ccwlock #define to_ccwdev(n) container_of(n, struct ccw_device, dev) #define to_ccwdrv(n) container_of(n, struct ccw_driver, driver) extern struct ccw_device *ccw_device_create_console(struct ccw_driver *); extern void ccw_device_destroy_console(struct ccw_device *); extern int ccw_device_enable_console(struct ccw_device *); extern void ccw_device_wait_idle(struct ccw_device *); extern void *ccw_device_dma_zalloc(struct ccw_device *cdev, size_t size); extern void ccw_device_dma_free(struct ccw_device *cdev, void *cpu_addr, size_t size); int ccw_device_siosl(struct ccw_device *); extern void ccw_device_get_schid(struct ccw_device *, struct subchannel_id *); struct channel_path_desc_fmt0 *ccw_device_get_chp_desc(struct ccw_device *, int); u8 *ccw_device_get_util_str(struct ccw_device *cdev, int chp_idx); int ccw_device_pnso(struct ccw_device *cdev, struct chsc_pnso_area *pnso_area, u8 oc, struct chsc_pnso_resume_token resume_token, int cnc); int ccw_device_get_cssid(struct ccw_device *cdev, u8 *cssid); int ccw_device_get_iid(struct ccw_device *cdev, u8 *iid); int ccw_device_get_chpid(struct ccw_device *cdev, int chp_idx, u8 *chpid); int ccw_device_get_chid(struct ccw_device *cdev, int chp_idx, u16 *chid); #endif /* _S390_CCWDEV_H_ */
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