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Diffstat (limited to 'include/asm-s390/s390io.h')
| -rw-r--r-- | include/asm-s390/s390io.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/include/asm-s390/s390io.h b/include/asm-s390/s390io.h new file mode 100644 index 000000000..8ba9c11db --- /dev/null +++ b/include/asm-s390/s390io.h @@ -0,0 +1,85 @@ +/* + * arch/s390/kernel/s390io.h + * + * S390 version + * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation + * Author(s): Ingo Adlung (adlung@de.ibm.com) + */ + +#ifndef __s390io_h +#define __s390io_h + +/* + * IRQ data structure used by I/O subroutines + * + * Note : If bit flags are added, the "unused" value must be + * decremented accordingly ! + */ +typedef struct _ioinfo { + unsigned int irq; /* aka. subchannel number */ + spinlock_t irq_lock; /* irq lock */ + + struct _ioinfo *prev; + struct _ioinfo *next; + + union { + unsigned int info; + struct { + unsigned int busy : 1; /* device currently in use */ + unsigned int oper : 1; /* device is operational */ + unsigned int fast : 1; /* post with "channel end", ... */ + /* ... don't wait for "device end" */ + /* ... from do_IO() parameters */ + unsigned int ready : 1; /* interrupt handler registered */ + unsigned int haltio : 1; /* halt_IO in process */ + unsigned int doio : 1; /* do_IO in process */ + unsigned int doio_q : 1; /* do_IO queued - only possible ... */ + /* ... if 'fast' is set too */ + unsigned int w4final : 1; /* wait for final status, internally */ + /* ... used with 'fast' setting only */ + unsigned int repall : 1; /* report every interrupt status */ + unsigned int unready : 1; /* deregister irq handler in process */ + unsigned int d_disable : 1; /* delayed disabling required */ + unsigned int w4sense : 1; /* SENSE status pending */ + unsigned int syncio : 1; /* synchronous I/O requested */ + unsigned int consns : 1; /* concurrent sense is available */ + unsigned int delsense : 1; /* delayed SENSE required */ + unsigned int s_pend : 1; /* status pending condition */ + unsigned int pgid : 1; /* "path group ID" is valid */ + unsigned int pgid_supp : 1; /* "path group ID" command is supported */ + unsigned int unused : (sizeof(unsigned int)*8 - 18); /* unused */ + } __attribute__ ((packed)) flags; + } ui; + + unsigned long u_intparm; /* user interruption parameter */ + senseid_t senseid; /* SenseID info */ + irq_desc_t irq_desc; /* irq descriptor */ + __u8 ulpm; /* logical path mask used for I/O */ + __u8 opm; /* path mask of operational paths */ + pgid_t pgid; /* path group ID */ + schib_t schib; /* subchannel information block */ + orb_t orb; /* operation request block */ + devstat_t devstat; /* device status */ + ccw1_t *qcpa; /* queued channel program */ + ccw1_t senseccw; /* ccw for sense command */ + unsigned int stctl; /* accumulated status control from irb */ + unsigned long qintparm; /* queued interruption parameter */ + unsigned long qflag; /* queued flags */ + unsigned char qlpm; /* queued logical path mask */ + + } __attribute__ ((aligned(8))) ioinfo_t; + +#define IOINFO_FLAGS_BUSY 0x80000000 +#define IOINFO_FLAGS_OPER 0x40000000 +#define IOINFO_FLAGS_FAST 0x20000000 +#define IOINFO_FLAGS_READY 0x10000000 +#define IOINFO_FLAGS_HALTIO 0x08000000 +#define IOINFO_FLAGS_DOIO 0x04000000 +#define IOINFO_FLAGS_DOIO_Q 0x02000000 +#define IOINFO_FLAGS_W4FINAL 0x01000000 +#define IOINFO_FLAGS_REPALL 0x00800000 + +extern ioinfo_t *ioinfo[]; + +#endif /* __s390io_h */ + |