#ifndef _CSS_H #define _CSS_H #include <linux/mutex.h> #include <linux/wait.h> #include <linux/workqueue.h> #include <linux/device.h> #include <linux/types.h> #include <asm/cio.h> #include <asm/chpid.h> #include <asm/schid.h> #include "cio.h" /* * path grouping stuff */ #define SPID_FUNC_SINGLE_PATH 0x00 #define SPID_FUNC_MULTI_PATH 0x80 #define SPID_FUNC_ESTABLISH 0x00 #define SPID_FUNC_RESIGN 0x40 #define SPID_FUNC_DISBAND 0x20 #define SNID_STATE1_RESET 0 #define SNID_STATE1_UNGROUPED 2 #define SNID_STATE1_GROUPED 3 #define SNID_STATE2_NOT_RESVD 0 #define SNID_STATE2_RESVD_ELSE 2 #define SNID_STATE2_RESVD_SELF 3 #define SNID_STATE3_MULTI_PATH 1 #define SNID_STATE3_SINGLE_PATH 0 struct path_state { __u8 state1 : 2; /* path state value 1 */ __u8 state2 : 2; /* path state value 2 */ __u8 state3 : 1; /* path state value 3 */ __u8 resvd : 3; /* reserved */ } __attribute__ ((packed)); struct extended_cssid { u8 version; u8 cssid; } __attribute__ ((packed)); struct pgid { union { __u8 fc; /* SPID function code */ struct path_state ps; /* SNID path state */ } __attribute__ ((packed)) inf; union { __u32 cpu_addr : 16; /* CPU address */ struct extended_cssid ext_cssid; } __attribute__ ((packed)) pgid_high; __u32 cpu_id : 24; /* CPU identification */ __u32 cpu_model : 16; /* CPU model */ __u32 tod_high; /* high word TOD clock */ } __attribute__ ((packed)); struct subchannel; struct chp_link; /** * struct css_driver - device driver for subchannels * @subchannel_type: subchannel type supported by this driver * @drv: embedded device driver structure * @irq: called on interrupts * @chp_event: called for events affecting a channel path * @sch_event: called for events affecting the subchannel * @probe: function called on probe * @remove: function called on remove * @shutdown: called at device shutdown * @prepare: prepare for pm state transition * @complete: undo work done in @prepare * @freeze: callback for freezing during hibernation snapshotting * @thaw: undo work done in @freeze * @restore: callback for restoring after hibernation * @settle: wait for asynchronous work to finish */ struct css_driver { struct css_device_id *subchannel_type; struct device_driver drv; void (*irq)(struct subchannel *); int (*chp_event)(struct subchannel *, struct chp_link *, int); int (*sch_event)(struct subchannel *, int); int (*probe)(struct subchannel *); int (*remove)(struct subchannel *); void (*shutdown)(struct subchannel *); int (*prepare) (struct subchannel *); void (*complete) (struct subchannel *); int (*freeze)(struct subchannel *); int (*thaw) (struct subchannel *); int (*restore)(struct subchannel *); int (*settle)(void); }; #define to_cssdriver(n) container_of(n, struct css_driver, drv) extern int css_driver_register(struct css_driver *); extern void css_driver_unregister(struct css_driver *); extern void css_sch_device_unregister(struct subchannel *); extern int css_probe_device(struct subchannel_id); extern struct subchannel *get_subchannel_by_schid(struct subchannel_id); extern int css_init_done; extern int max_ssid; int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *), int (*fn_unknown)(struct subchannel_id, void *), void *data); extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *); extern void css_reiterate_subchannels(void); void css_update_ssd_info(struct subchannel *sch); #define __MAX_SUBCHANNEL 65535 #define __MAX_SSID 3 struct channel_subsystem { u8 cssid; int valid; struct channel_path *chps[__MAX_CHPID + 1]; struct device device; struct pgid global_pgid; struct mutex mutex; /* channel measurement related */ int cm_enabled; void *cub_addr1; void *cub_addr2; /* for orphaned ccw devices */ struct subchannel *pseudo_subchannel; }; #define to_css(dev) container_of(dev, struct channel_subsystem, device) extern struct channel_subsystem *channel_subsystems[]; void channel_subsystem_reinit(void); /* Helper functions to build lists for the slow path. */ void css_schedule_eval(struct subchannel_id schid); void css_schedule_eval_all(void); int css_complete_work(void); int sch_is_pseudo_sch(struct subchannel *); struct schib; int css_sch_is_valid(struct schib *); extern struct workqueue_struct *cio_work_q; void css_wait_for_slow_path(void); void css_sched_sch_todo(struct subchannel *sch, enum sch_todo todo); #endif