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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 */
__u32 syncnt; /* sync I/O recursive usage count */
} __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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