[linux-2.6-block.git] / drivers / s390 / cio / cio.h

#ifndef S390_CIO_H
#define S390_CIO_H

#include <linux/mutex.h>
#include <linux/device.h>
#include <asm/chpid.h>
#include "chsc.h"
#include "schid.h"

/*
 * path management control word
 */
struct pmcw {
	__u32 intparm;		/* interruption parameter */
	__u32 qf   : 1;		/* qdio facility */
	__u32 res0 : 1;		/* reserved zeros */
	__u32 isc  : 3;		/* interruption sublass */
	__u32 res5 : 3;		/* reserved zeros */
	__u32 ena  : 1;		/* enabled */
	__u32 lm   : 2;		/* limit mode */
	__u32 mme  : 2;		/* measurement-mode enable */
	__u32 mp   : 1;		/* multipath mode */
	__u32 tf   : 1;		/* timing facility */
	__u32 dnv  : 1;		/* device number valid */
	__u32 dev  : 16;	/* device number */
	__u8  lpm;		/* logical path mask */
	__u8  pnom;		/* path not operational mask */
	__u8  lpum;		/* last path used mask */
	__u8  pim;		/* path installed mask */
	__u16 mbi;		/* measurement-block index */
	__u8  pom;		/* path operational mask */
	__u8  pam;		/* path available mask */
	__u8  chpid[8];		/* CHPID 0-7 (if available) */
	__u32 unused1 : 8;	/* reserved zeros */
	__u32 st      : 3;	/* subchannel type */
	__u32 unused2 : 18;	/* reserved zeros */
	__u32 mbfc    : 1;      /* measurement block format control */
	__u32 xmwme   : 1;      /* extended measurement word mode enable */
	__u32 csense  : 1;	/* concurrent sense; can be enabled ...*/
				/*  ... per MSCH, however, if facility */
				/*  ... is not installed, this results */
				/*  ... in an operand exception.       */
} __attribute__ ((packed));

/*
 * subchannel information block
 */
struct schib {
	struct pmcw pmcw;	 /* path management control word */
	struct scsw scsw;	 /* subchannel status word */
	__u64 mba;               /* measurement block address */
	__u8 mda[4];		 /* model dependent area */
} __attribute__ ((packed,aligned(4)));

/*
 * operation request block
 */
struct orb {
	__u32 intparm;		/* interruption parameter */
	__u32 key  : 4; 	/* flags, like key, suspend control, etc. */
	__u32 spnd : 1; 	/* suspend control */
	__u32 res1 : 1; 	/* reserved */
	__u32 mod  : 1; 	/* modification control */
	__u32 sync : 1; 	/* synchronize control */
	__u32 fmt  : 1; 	/* format control */
	__u32 pfch : 1; 	/* prefetch control */
	__u32 isic : 1; 	/* initial-status-interruption control */
	__u32 alcc : 1; 	/* address-limit-checking control */
	__u32 ssic : 1; 	/* suppress-suspended-interr. control */
	__u32 res2 : 1; 	/* reserved */
	__u32 c64  : 1; 	/* IDAW/QDIO 64 bit control  */
	__u32 i2k  : 1; 	/* IDAW 2/4kB block size control */
	__u32 lpm  : 8; 	/* logical path mask */
	__u32 ils  : 1; 	/* incorrect length */
	__u32 zero : 6; 	/* reserved zeros */
	__u32 orbx : 1; 	/* ORB extension control */
	__u32 cpa;		/* channel program address */
}  __attribute__ ((packed,aligned(4)));

/* subchannel data structure used by I/O subroutines */
struct subchannel {
	struct subchannel_id schid;
	spinlock_t *lock;	/* subchannel lock */
	struct mutex reg_mutex;
	enum {
		SUBCHANNEL_TYPE_IO = 0,
		SUBCHANNEL_TYPE_CHSC = 1,
		SUBCHANNEL_TYPE_MESSAGE = 2,
		SUBCHANNEL_TYPE_ADM = 3,
	} st;			/* subchannel type */

	struct {
		unsigned int suspend:1; /* allow suspend */
		unsigned int prefetch:1;/* deny prefetch */
		unsigned int inter:1;   /* suppress intermediate interrupts */
	} __attribute__ ((packed)) options;

	__u8 vpm;		/* verified path mask */
	__u8 lpm;		/* logical path mask */
	__u8 opm;               /* operational path mask */
	struct schib schib;	/* subchannel information block */
	struct orb orb;		/* operation request block */
	struct ccw1 sense_ccw;	/* static ccw for sense command */
	struct chsc_ssd_info ssd_info;	/* subchannel description */
	struct device dev;	/* entry in device tree */
	struct css_driver *driver;
} __attribute__ ((aligned(8)));

#define IO_INTERRUPT_TYPE	   0 /* I/O interrupt type */

#define to_subchannel(n) container_of(n, struct subchannel, dev)

extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
extern int cio_enable_subchannel (struct subchannel *, unsigned int);
extern int cio_disable_subchannel (struct subchannel *);
extern int cio_cancel (struct subchannel *);
extern int cio_clear (struct subchannel *);
extern int cio_resume (struct subchannel *);
extern int cio_halt (struct subchannel *);
extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
extern int cio_cancel (struct subchannel *);
extern int cio_set_options (struct subchannel *, int);
extern int cio_get_options (struct subchannel *);
extern int cio_modify (struct subchannel *);

int cio_create_sch_lock(struct subchannel *);

/* Use with care. */
#ifdef CONFIG_CCW_CONSOLE
extern struct subchannel *cio_probe_console(void);
extern void cio_release_console(void);
extern int cio_is_console(struct subchannel_id);
extern struct subchannel *cio_get_console_subchannel(void);
extern spinlock_t * cio_get_console_lock(void);
#else
#define cio_is_console(schid) 0
#define cio_get_console_subchannel() NULL
#define cio_get_console_lock() NULL;
#endif

extern int cio_show_msg;

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef S390_CIO_H
	2	#define S390_CIO_H
	3
6ab4879a	4	#include <linux/mutex.h>
e5854a58	5	#include <linux/device.h>
7ad6a249 PO	6	#include <asm/chpid.h>
	7	#include "chsc.h"
	8	#include "schid.h"
1da177e4 LT	9
	10	/*
	11	* path management control word
	12	*/
	13	struct pmcw {
	14	__u32 intparm; /* interruption parameter */
	15	__u32 qf : 1; /* qdio facility */
	16	__u32 res0 : 1; /* reserved zeros */
	17	__u32 isc : 3; /* interruption sublass */
	18	__u32 res5 : 3; /* reserved zeros */
	19	__u32 ena : 1; /* enabled */
	20	__u32 lm : 2; /* limit mode */
	21	__u32 mme : 2; /* measurement-mode enable */
	22	__u32 mp : 1; /* multipath mode */
	23	__u32 tf : 1; /* timing facility */
	24	__u32 dnv : 1; /* device number valid */
	25	__u32 dev : 16; /* device number */
	26	__u8 lpm; /* logical path mask */
	27	__u8 pnom; /* path not operational mask */
	28	__u8 lpum; /* last path used mask */
	29	__u8 pim; /* path installed mask */
	30	__u16 mbi; /* measurement-block index */
	31	__u8 pom; /* path operational mask */
	32	__u8 pam; /* path available mask */
	33	__u8 chpid[8]; /* CHPID 0-7 (if available) */
	34	__u32 unused1 : 8; /* reserved zeros */
	35	__u32 st : 3; /* subchannel type */
	36	__u32 unused2 : 18; /* reserved zeros */
	37	__u32 mbfc : 1; /* measurement block format control */
	38	__u32 xmwme : 1; /* extended measurement word mode enable */
	39	__u32 csense : 1; /* concurrent sense; can be enabled ...*/
	40	/* ... per MSCH, however, if facility */
	41	/* ... is not installed, this results */
	42	/* ... in an operand exception. */
	43	} __attribute__ ((packed));
	44
	45	/*
	46	* subchannel information block
	47	*/
	48	struct schib {
	49	struct pmcw pmcw; /* path management control word */
	50	struct scsw scsw; /* subchannel status word */
	51	__u64 mba; /* measurement block address */
	52	__u8 mda[4]; /* model dependent area */
	53	} __attribute__ ((packed,aligned(4)));
	54
	55	/*
	56	* operation request block
	57	*/
	58	struct orb {
	59	__u32 intparm; /* interruption parameter */
	60	__u32 key : 4; /* flags, like key, suspend control, etc. */
	61	__u32 spnd : 1; /* suspend control */
	62	__u32 res1 : 1; /* reserved */
	63	__u32 mod : 1; /* modification control */
	64	__u32 sync : 1; /* synchronize control */
	65	__u32 fmt : 1; /* format control */
	66	__u32 pfch : 1; /* prefetch control */
	67	__u32 isic : 1; /* initial-status-interruption control */
	68	__u32 alcc : 1; /* address-limit-checking control */
	69	__u32 ssic : 1; /* suppress-suspended-interr. control */
	70	__u32 res2 : 1; /* reserved */
	71	__u32 c64 : 1; /* IDAW/QDIO 64 bit control */
	72	__u32 i2k : 1; /* IDAW 2/4kB block size control */
73	__u32 lpm : 8; /* logical path mask */
74	__u32 ils : 1; /* incorrect length */
75	__u32 zero : 6; /* reserved zeros */
76	__u32 orbx : 1; /* ORB extension control */
77	__u32 cpa; /* channel program address */
78	} __attribute__ ((packed,aligned(4)));
79
80	/* subchannel data structure used by I/O subroutines */
81	struct subchannel {
a8237fc4	82	struct subchannel_id schid;
2ec22984	83	spinlock_t lock; / subchannel lock */
6ab4879a	84	struct mutex reg_mutex;
1da177e4 LT	85	enum {
	86	SUBCHANNEL_TYPE_IO = 0,
	87	SUBCHANNEL_TYPE_CHSC = 1,
	88	SUBCHANNEL_TYPE_MESSAGE = 2,
	89	SUBCHANNEL_TYPE_ADM = 3,
	90	} st; /* subchannel type */
	91
	92	struct {
	93	unsigned int suspend:1; /* allow suspend */
	94	unsigned int prefetch:1;/* deny prefetch */
	95	unsigned int inter:1; /* suppress intermediate interrupts */
	96	} __attribute__ ((packed)) options;
	97
	98	__u8 vpm; /* verified path mask */
	99	__u8 lpm; /* logical path mask */
	100	__u8 opm; /* operational path mask */
	101	struct schib schib; /* subchannel information block */
	102	struct orb orb; /* operation request block */
	103	struct ccw1 sense_ccw; /* static ccw for sense command */
7ad6a249	104	struct chsc_ssd_info ssd_info; /* subchannel description */
1da177e4 LT	105	struct device dev; /* entry in device tree */
	106	struct css_driver *driver;
	107	} __attribute__ ((aligned(8)));
	108
	109	#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
	110
	111	#define to_subchannel(n) container_of(n, struct subchannel, dev)
	112
a8237fc4	113	extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
1da177e4 LT	114	extern int cio_enable_subchannel (struct subchannel *, unsigned int);
	115	extern int cio_disable_subchannel (struct subchannel *);
	116	extern int cio_cancel (struct subchannel *);
	117	extern int cio_clear (struct subchannel *);
	118	extern int cio_resume (struct subchannel *);
	119	extern int cio_halt (struct subchannel *);
	120	extern int cio_start (struct subchannel , struct ccw1 , __u8);
	121	extern int cio_start_key (struct subchannel , struct ccw1 , __u8, __u8);
	122	extern int cio_cancel (struct subchannel *);
	123	extern int cio_set_options (struct subchannel *, int);
	124	extern int cio_get_options (struct subchannel *);
	125	extern int cio_modify (struct subchannel *);
a8237fc4	126
d7b5a4c9 CH	127	int cio_create_sch_lock(struct subchannel *);
d7b5a4c9 CH	128
1da177e4 LT	129	/* Use with care. */
	130	#ifdef CONFIG_CCW_CONSOLE
	131	extern struct subchannel *cio_probe_console(void);
	132	extern void cio_release_console(void);
a8237fc4	133	extern int cio_is_console(struct subchannel_id);
1da177e4	134	extern struct subchannel *cio_get_console_subchannel(void);
2ec22984	135	extern spinlock_t * cio_get_console_lock(void);
1da177e4	136	#else
a8237fc4	137	#define cio_is_console(schid) 0
1da177e4	138	#define cio_get_console_subchannel() NULL
2ec22984	139	#define cio_get_console_lock() NULL;
1da177e4 LT	140	#endif
	141
	142	extern int cio_show_msg;
	143
	144	#endif