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phoenix |
/*
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* arch/s390/kernel/s390io.h
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*
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* S390 version
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* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Ingo Adlung (adlung@de.ibm.com)
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*/
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#ifndef __s390io_h
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#define __s390io_h
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#include <linux/tqueue.h>
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/*
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* IRQ data structure used by I/O subroutines
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*
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* Note : If bit flags are added, the "unused" value must be
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* decremented accordingly !
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*/
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typedef struct _ioinfo {
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unsigned int irq; /* aka. subchannel number */
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spinlock_t irq_lock; /* irq lock */
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void *private_data; /* pointer to private data */
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struct _ioinfo *prev;
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struct _ioinfo *next;
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__u8 st; /* subchannel type */
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union {
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unsigned int info;
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struct {
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unsigned int busy : 1; /* device currently in use */
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unsigned int oper : 1; /* device is operational */
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unsigned int fast : 1; /* post with "channel end", ... */
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/* ... don't wait for "device end" */
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/* ... from do_IO() parameters */
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unsigned int ready : 1; /* interrupt handler registered */
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unsigned int haltio : 1; /* halt_IO in process */
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unsigned int doio : 1; /* do_IO in process */
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unsigned int w4final : 1; /* wait for final status, internally */
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/* ... used with 'fast' setting only */
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unsigned int repall : 1; /* report every interrupt status */
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unsigned int unready : 1; /* deregister irq handler in process */
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unsigned int d_disable : 1; /* delayed disabling required */
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unsigned int w4sense : 1; /* SENSE status pending */
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unsigned int syncio : 1; /* synchronous I/O requested */
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unsigned int consns : 1; /* concurrent sense is available */
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unsigned int delsense : 1; /* delayed SENSE required */
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unsigned int s_pend : 1; /* status pending condition */
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unsigned int pgid : 1; /* "path group ID" is valid */
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unsigned int pgid_supp : 1; /* "path group ID" command is supported */
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unsigned int esid : 1; /* Ext. SenseID supported by HW */
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unsigned int repnone : 1; /* don't call IRQ handler on interrupt */
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unsigned int newreq : 1; /* new register interface */
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unsigned int dval : 1; /* device number valid */
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unsigned int unknown : 1; /* unknown device - if SenseID failed */
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unsigned int unfriendly: 1; /* device is locked by someone else */
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unsigned int killio : 1; /* currently killing pending io */
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unsigned int noio : 1; /* don't let drivers start io */
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unsigned int notacccap : 1; /* capable of handling DEVSTAT_NOT_ACC */
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unsigned int unused : (sizeof(unsigned int)*8 - 26); /* unused */
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} __attribute__ ((packed)) flags;
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} ui;
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unsigned long u_intparm; /* user interruption parameter */
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senseid_t senseid; /* SenseID info */
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irq_desc_t irq_desc; /* irq descriptor */
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not_oper_handler_func_t nopfunc; /* not oper handler */
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__u8 opm; /* path mask of operational paths */
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__u16 devno; /* device number */
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pgid_t pgid; /* path group ID */
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schib_t schib; /* subchannel information block */
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orb_t orb; /* operation request block */
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devstat_t devstat; /* device status */
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ccw1_t senseccw; /* ccw for sense command */
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__u8 sense_data[32];/* buffer for basic sense */
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unsigned int stctl; /* accumulated status control from irb */
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ssd_info_t ssd_info; /* subchannel description */
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struct tq_struct pver_bh; /* path verification bottom half task */
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atomic_t pver_pending; /* != 0 if path verification for sch is pending */
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} __attribute__ ((aligned(8))) ioinfo_t;
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#define IOINFO_FLAGS_BUSY 0x80000000
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#define IOINFO_FLAGS_OPER 0x40000000
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#define IOINFO_FLAGS_FAST 0x20000000
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#define IOINFO_FLAGS_READY 0x10000000
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#define IOINFO_FLAGS_HALTIO 0x08000000
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#define IOINFO_FLAGS_DOIO 0x04000000
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#define IOINFO_FLAGS_DOIO_Q 0x02000000
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#define IOINFO_FLAGS_W4FINAL 0x01000000
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#define IOINFO_FLAGS_REPALL 0x00800000
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extern ioinfo_t *ioinfo[];
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int s390_set_private_data(int irq, void * data);
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void * s390_get_private_data(int irq);
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#define CHSC_SEI_ACC_CHPID 1
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#define CHSC_SEI_ACC_LINKADDR 2
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#define CHSC_SEI_ACC_FULLLINKADDR 3
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#define CIO_PATHGONE_WAIT4INT 0x01
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#define CIO_PATHGONE_IOERR 0x02
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#define CIO_PATHGONE_DEVGONE 0x04
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#endif /* __s390io_h */
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