diff options
Diffstat (limited to 'drivers/s390/cio/css.h')
| -rw-r--r-- | drivers/s390/cio/css.h | 53 |
1 files changed, 36 insertions, 17 deletions
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index b1de60335238..a65a27dc520c 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _CSS_H #define _CSS_H @@ -33,6 +34,23 @@ #define SNID_STATE3_MULTI_PATH 1 #define SNID_STATE3_SINGLE_PATH 0 +/* + * Miscellaneous constants + */ + +#define CSS_NUM_CUB_PAGES 2 +#define CSS_CUES_PER_PAGE 128 +#define CSS_NUM_ECUB_PAGES 4 +#define CSS_ECUES_PER_PAGE 64 + +/* + * Conditions used to specify which subchannels need evaluation + */ +enum css_eval_cond { + CSS_EVAL_NO_PATH, /* Subchannels with no operational paths */ + CSS_EVAL_NOT_ONLINE /* sch without an online-device */ +}; + struct path_state { __u8 state1 : 2; /* path state value 1 */ __u8 state2 : 2; /* path state value 2 */ @@ -71,11 +89,6 @@ struct chp_link; * @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 { @@ -85,24 +98,20 @@ struct css_driver { int (*chp_event)(struct subchannel *, struct chp_link *, int); int (*sch_event)(struct subchannel *, int); int (*probe)(struct subchannel *); - int (*remove)(struct subchannel *); + void (*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) +#define to_cssdriver(n) container_of_const(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_register_subchannel(struct subchannel *); -extern struct subchannel *css_alloc_subchannel(struct subchannel_id); +extern struct subchannel *css_alloc_subchannel(struct subchannel_id, + struct schib *schib); extern struct subchannel *get_subchannel_by_schid(struct subchannel_id); extern int css_init_done; extern int max_ssid; @@ -114,15 +123,16 @@ void css_update_ssd_info(struct subchannel *sch); struct channel_subsystem { u8 cssid; - int valid; + u8 iid; + bool id_valid; /* cssid,iid */ 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; + void *cub[CSS_NUM_CUB_PAGES]; + void *ecub[CSS_NUM_ECUB_PAGES]; /* for orphaned ccw devices */ struct subchannel *pseudo_subchannel; }; @@ -130,11 +140,20 @@ struct channel_subsystem { extern struct channel_subsystem *channel_subsystems[]; -void channel_subsystem_reinit(void); +/* Dummy helper which needs to change once we support more than one css. */ +static inline struct channel_subsystem *css_by_id(u8 cssid) +{ + return channel_subsystems[0]; +} + +/* Dummy iterator which needs to change once we support more than one css. */ +#define for_each_css(css) \ + for ((css) = channel_subsystems[0]; (css); (css) = NULL) /* Helper functions to build lists for the slow path. */ void css_schedule_eval(struct subchannel_id schid); void css_schedule_eval_all(void); +void css_schedule_eval_cond(enum css_eval_cond, unsigned long delay); int css_complete_work(void); int sch_is_pseudo_sch(struct subchannel *); |