[deliverable/linux.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)));

/* 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_MSG = 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 */
	int isc; /* desired interruption subclass */
	struct chsc_ssd_info ssd_info;	/* subchannel description */
	struct device dev;	/* entry in device tree */
	struct css_driver *driver;
	void *private; /* private per subchannel type data */
} __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 *, u32);
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 *);
void do_adapter_IO(void);
void do_IRQ(struct pt_regs *);

/* 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);
extern void *cio_get_console_priv(void);
#else
#define cio_is_console(schid) 0
#define cio_get_console_subchannel() NULL
#define cio_get_console_lock() NULL
#define cio_get_console_priv() NULL
#endif

#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 {
cd6b4f27 CH	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 ...*/
1da177e4 LT	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
1da177e4 LT	55	/* subchannel data structure used by I/O subroutines */
1da177e4 LT	56	struct subchannel {
a8237fc4	57	struct subchannel_id schid;
2ec22984	58	spinlock_t lock; / subchannel lock */
6ab4879a	59	struct mutex reg_mutex;
1da177e4 LT	60	enum {
	61	SUBCHANNEL_TYPE_IO = 0,
	62	SUBCHANNEL_TYPE_CHSC = 1,
b279a4f5	63	SUBCHANNEL_TYPE_MSG = 2,
1da177e4 LT	64	SUBCHANNEL_TYPE_ADM = 3,
	65	} st; /* subchannel type */
	66
	67	struct {
	68	unsigned int suspend:1; /* allow suspend */
	69	unsigned int prefetch:1;/* deny prefetch */
	70	unsigned int inter:1; /* suppress intermediate interrupts */
	71	} __attribute__ ((packed)) options;
	72
	73	__u8 vpm; /* verified path mask */
	74	__u8 lpm; /* logical path mask */
	75	__u8 opm; /* operational path mask */
	76	struct schib schib; /* subchannel information block */
edf22096	77	int isc; /* desired interruption subclass */
7ad6a249	78	struct chsc_ssd_info ssd_info; /* subchannel description */
1da177e4 LT	79	struct device dev; /* entry in device tree */
1da177e4 LT	80	struct css_driver *driver;
cd6b4f27	81	void private; / private per subchannel type data */
1da177e4 LT	82	} __attribute__ ((aligned(8)));
	83
	84	#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
	85
	86	#define to_subchannel(n) container_of(n, struct subchannel, dev)
	87
a8237fc4	88	extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
edf22096	89	extern int cio_enable_subchannel(struct subchannel *, u32);
1da177e4 LT	90	extern int cio_disable_subchannel (struct subchannel *);
	91	extern int cio_cancel (struct subchannel *);
	92	extern int cio_clear (struct subchannel *);
	93	extern int cio_resume (struct subchannel *);
	94	extern int cio_halt (struct subchannel *);
	95	extern int cio_start (struct subchannel , struct ccw1 , __u8);
	96	extern int cio_start_key (struct subchannel , struct ccw1 , __u8, __u8);
	97	extern int cio_cancel (struct subchannel *);
	98	extern int cio_set_options (struct subchannel *, int);
	99	extern int cio_get_options (struct subchannel *);
	100	extern int cio_modify (struct subchannel *);
a8237fc4	101
d7b5a4c9	102	int cio_create_sch_lock(struct subchannel *);
4e8e56c6	103	void do_adapter_IO(void);
a806170e	104	void do_IRQ(struct pt_regs *);
d7b5a4c9	105
1da177e4 LT	106	/* Use with care. */
	107	#ifdef CONFIG_CCW_CONSOLE
	108	extern struct subchannel *cio_probe_console(void);
	109	extern void cio_release_console(void);
a8237fc4	110	extern int cio_is_console(struct subchannel_id);
1da177e4	111	extern struct subchannel *cio_get_console_subchannel(void);
2ec22984	112	extern spinlock_t * cio_get_console_lock(void);
cd6b4f27	113	extern void *cio_get_console_priv(void);
1da177e4	114	#else
a8237fc4	115	#define cio_is_console(schid) 0
1da177e4	116	#define cio_get_console_subchannel() NULL
cd6b4f27 CH	117	#define cio_get_console_lock() NULL
cd6b4f27 CH	118	#define cio_get_console_priv() NULL
1da177e4 LT	119	#endif
1da177e4 LT	120
1da177e4	121	#endif