Release 4.7 drivers/s390/cio/css.h

#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_register_subchannel(struct subchannel *);
extern struct subchannel *css_alloc_subchannel(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 *);
void css_update_ssd_info(struct subchannel *sch);


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[];

/* 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_all_unreg(unsigned long delay);
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
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cornelia huck
cornelia huck
232
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martin schwidefsky
martin schwidefsky
180
28.08%
1
2.56%
sebastian ott
sebastian ott
94
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peter oberparleiter
peter oberparleiter
92
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andrew morton
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Directory: drivers/s390/cio

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