s390io.h
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上传日期：2013-02-24
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- /*
- * 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 esid : 1; /* Ext. SenseID supported by HW */
- unsigned int rcd : 1; /* RCD supported by HW */
- unsigned int repnone : 1; /* don't call IRQ handler on interrupt */
- unsigned int newreq : 1; /* new register interface */
- unsigned int dval : 1; /* device number valid */
- unsigned int unknown : 1; /* unknown device - if SenseID failed */
- unsigned int unused : (sizeof(unsigned int)*8 - 24); /* unused */
- } __attribute__ ((packed)) flags;
- } ui;
- unsigned long u_intparm; /* user interruption parameter */
- senseid_t senseid; /* SenseID info */
- irq_desc_t irq_desc; /* irq descriptor */
- not_oper_handler_func_t nopfunc; /* not oper handler */
- __u8 ulpm; /* logical path mask used for I/O */
- __u8 opm; /* path mask of operational paths */
- __u16 devno; /* device number */
- 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 */
- __u8 sense_data[32];/* buffer for basic sense */
- unsigned int stctl; /* accumulated status control from irb */
- unsigned long qintparm; /* queued interruption parameter */
- unsigned long qflag; /* queued flags */
- __u8 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 */
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