diff options
Diffstat (limited to 'drivers/s390/cio/cio.h')
| -rw-r--r-- | drivers/s390/cio/cio.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h new file mode 100644 index 00000000000..c50a9da420a --- /dev/null +++ b/drivers/s390/cio/cio.h @@ -0,0 +1,143 @@ +#ifndef S390_CIO_H +#define S390_CIO_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 { + unsigned int irq; /* aka. subchannel number */ + 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 *, unsigned int); +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(int irq); +extern struct subchannel *cio_get_console_subchannel(void); +#else +#define cio_is_console(irq) 0 +#define cio_get_console_subchannel() NULL +#endif + +extern int cio_show_msg; + +#endif |