[mirror_ubuntu-artful-kernel.git] / drivers / s390 / cio / cio.h

#ifndef S390_CIO_H
#define S390_CIO_H

#include "schid.h"

/*
 * where we put the ssd info
 */
struct ssd_info {
	__u8  valid:1;
	__u8  type:7;		/* subchannel type */
	__u8  chpid[8];		/* chpids */
	__u16 fla[8];		/* full link addresses */
} __attribute__ ((packed));

/*
 * 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 */

	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 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 *);

/* 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);
#else
#define cio_is_console(schid) 0
#define cio_get_console_subchannel() NULL
#endif

extern int cio_show_msg;

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef S390_CIO_H
	2	#define S390_CIO_H
	3
a8237fc4 CH	4	#include "schid.h"
a8237fc4 CH	5
1da177e4 LT	6	/*
	7	* where we put the ssd info
	8	*/
	9	struct ssd_info {
	10	__u8 valid:1;
	11	__u8 type:7; /* subchannel type */
	12	__u8 chpid[8]; /* chpids */
	13	__u16 fla[8]; /* full link addresses */
	14	} __attribute__ ((packed));
	15
	16	/*
	17	* path management control word
	18	*/
	19	struct pmcw {
	20	__u32 intparm; /* interruption parameter */
	21	__u32 qf : 1; /* qdio facility */
	22	__u32 res0 : 1; /* reserved zeros */
	23	__u32 isc : 3; /* interruption sublass */
	24	__u32 res5 : 3; /* reserved zeros */
	25	__u32 ena : 1; /* enabled */
	26	__u32 lm : 2; /* limit mode */
	27	__u32 mme : 2; /* measurement-mode enable */
	28	__u32 mp : 1; /* multipath mode */
	29	__u32 tf : 1; /* timing facility */
	30	__u32 dnv : 1; /* device number valid */
	31	__u32 dev : 16; /* device number */
	32	__u8 lpm; /* logical path mask */
	33	__u8 pnom; /* path not operational mask */
	34	__u8 lpum; /* last path used mask */
	35	__u8 pim; /* path installed mask */
	36	__u16 mbi; /* measurement-block index */
	37	__u8 pom; /* path operational mask */
	38	__u8 pam; /* path available mask */
	39	__u8 chpid[8]; /* CHPID 0-7 (if available) */
	40	__u32 unused1 : 8; /* reserved zeros */
	41	__u32 st : 3; /* subchannel type */
	42	__u32 unused2 : 18; /* reserved zeros */
	43	__u32 mbfc : 1; /* measurement block format control */
	44	__u32 xmwme : 1; /* extended measurement word mode enable */
	45	__u32 csense : 1; /* concurrent sense; can be enabled ...*/
	46	/* ... per MSCH, however, if facility */
	47	/* ... is not installed, this results */
	48	/* ... in an operand exception. */
	49	} __attribute__ ((packed));
	50
	51	/*
	52	* subchannel information block
	53	*/
	54	struct schib {
	55	struct pmcw pmcw; /* path management control word */
	56	struct scsw scsw; /* subchannel status word */
	57	__u64 mba; /* measurement block address */
	58	__u8 mda[4]; /* model dependent area */
	59	} __attribute__ ((packed,aligned(4)));
	60
	61	/*
	62	* operation request block
	63	*/
	64	struct orb {
	65	__u32 intparm; /* interruption parameter */
	66	__u32 key : 4; /* flags, like key, suspend control, etc. */
	67	__u32 spnd : 1; /* suspend control */
	68	__u32 res1 : 1; /* reserved */
	69	__u32 mod : 1; /* modification control */
70	__u32 sync : 1; /* synchronize control */
71	__u32 fmt : 1; /* format control */
72	__u32 pfch : 1; /* prefetch control */
73	__u32 isic : 1; /* initial-status-interruption control */
74	__u32 alcc : 1; /* address-limit-checking control */
75	__u32 ssic : 1; /* suppress-suspended-interr. control */
76	__u32 res2 : 1; /* reserved */
77	__u32 c64 : 1; /* IDAW/QDIO 64 bit control */
78	__u32 i2k : 1; /* IDAW 2/4kB block size control */
79	__u32 lpm : 8; /* logical path mask */
80	__u32 ils : 1; /* incorrect length */
81	__u32 zero : 6; /* reserved zeros */
82	__u32 orbx : 1; /* ORB extension control */
83	__u32 cpa; /* channel program address */
84	} __attribute__ ((packed,aligned(4)));
85
86	/* subchannel data structure used by I/O subroutines */
87	struct subchannel {
a8237fc4	88	struct subchannel_id schid;
1da177e4 LT	89	spinlock_t lock; /* subchannel lock */
	90
	91	enum {
	92	SUBCHANNEL_TYPE_IO = 0,
	93	SUBCHANNEL_TYPE_CHSC = 1,
	94	SUBCHANNEL_TYPE_MESSAGE = 2,
	95	SUBCHANNEL_TYPE_ADM = 3,
	96	} st; /* subchannel type */
	97
	98	struct {
	99	unsigned int suspend:1; /* allow suspend */
	100	unsigned int prefetch:1;/* deny prefetch */
	101	unsigned int inter:1; /* suppress intermediate interrupts */
	102	} __attribute__ ((packed)) options;
	103
	104	__u8 vpm; /* verified path mask */
	105	__u8 lpm; /* logical path mask */
	106	__u8 opm; /* operational path mask */
	107	struct schib schib; /* subchannel information block */
	108	struct orb orb; /* operation request block */
	109	struct ccw1 sense_ccw; /* static ccw for sense command */
	110	struct ssd_info ssd_info; /* subchannel description */
	111	struct device dev; /* entry in device tree */
	112	struct css_driver *driver;
	113	} __attribute__ ((aligned(8)));
	114
	115	#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
	116
	117	#define to_subchannel(n) container_of(n, struct subchannel, dev)
	118
a8237fc4	119	extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
1da177e4 LT	120	extern int cio_enable_subchannel (struct subchannel *, unsigned int);
	121	extern int cio_disable_subchannel (struct subchannel *);
	122	extern int cio_cancel (struct subchannel *);
	123	extern int cio_clear (struct subchannel *);
	124	extern int cio_resume (struct subchannel *);
	125	extern int cio_halt (struct subchannel *);
	126	extern int cio_start (struct subchannel , struct ccw1 , __u8);
	127	extern int cio_start_key (struct subchannel , struct ccw1 , __u8, __u8);
	128	extern int cio_cancel (struct subchannel *);
	129	extern int cio_set_options (struct subchannel *, int);
	130	extern int cio_get_options (struct subchannel *);
	131	extern int cio_modify (struct subchannel *);
a8237fc4	132
1da177e4 LT	133	/* Use with care. */
	134	#ifdef CONFIG_CCW_CONSOLE
	135	extern struct subchannel *cio_probe_console(void);
	136	extern void cio_release_console(void);
a8237fc4	137	extern int cio_is_console(struct subchannel_id);
1da177e4 LT	138	extern struct subchannel *cio_get_console_subchannel(void);
1da177e4 LT	139	#else
a8237fc4	140	#define cio_is_console(schid) 0
1da177e4 LT	141	#define cio_get_console_subchannel() NULL
	142	#endif
	143
	144	extern int cio_show_msg;
	145
	146	#endif