#ifndef S390_CIO_H #define S390_CIO_H #include <linux/mutex.h> #include <linux/device.h> #include <linux/mod_devicetable.h> #include <asm/chpid.h> #include <asm/cio.h> #include <asm/fcx.h> #include <asm/schid.h> #include "chsc.h" /* * path management control word */ struct pmcw { u32 intparm; /* interruption parameter */ u32 qf : 1; /* qdio facility */ u32 w : 1; 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)); /* Target SCHIB configuration. */ struct schib_config { u64 mba; u32 intparm; u16 mbi; u32 isc:3; u32 ena:1; u32 mme:2; u32 mp:1; u32 csense:1; u32 mbfc:1; } __attribute__ ((packed)); /* * subchannel information block */ struct schib { struct pmcw pmcw; /* path management control word */ union scsw scsw; /* subchannel status word */ __u64 mba; /* measurement block address */ __u8 mda[4]; /* model dependent area */ } __attribute__ ((packed,aligned(4))); /* * When rescheduled, todo's with higher values will overwrite those * with lower values. */ enum sch_todo { SCH_TODO_NOTHING, SCH_TODO_EVAL, SCH_TODO_UNREG, }; /* 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 */ __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; enum sch_todo todo; struct work_struct todo_work; struct schib_config config; } __attribute__ ((aligned(8))); DECLARE_PER_CPU(struct irb, cio_irb); #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_update_schib(struct subchannel *sch); extern int cio_commit_config(struct subchannel *sch); int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); int cio_tm_intrg(struct subchannel *sch); /* Use with care. */ #ifdef CONFIG_CCW_CONSOLE extern struct subchannel *cio_probe_console(void); extern int cio_is_console(struct subchannel_id); extern void cio_register_early_subchannels(void); extern void cio_tsch(struct subchannel *sch); #else #define cio_is_console(schid) 0 static inline void cio_register_early_subchannels(void) {} #endif #endif