LXR linux-old/include/asm-s390/s390io.h

   1/*
   2 *  arch/s390/kernel/s390io.h
   3 *
   4 *  S390 version
   5 *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
   6 *    Author(s): Ingo Adlung (adlung@de.ibm.com)
   7 */
   8
   9#ifndef __s390io_h
  10#define __s390io_h
  11#include <linux/tqueue.h>
  12
  13/*
  14 * IRQ data structure used by I/O subroutines
  15 *
  16 * Note : If bit flags are added, the "unused" value must be
  17 *        decremented accordingly !
  18 */
  19typedef struct _ioinfo {
  20     unsigned int  irq;           /* aka. subchannel number */
  21     spinlock_t    irq_lock;      /* irq lock */
  22     void          *private_data; /* pointer to private data */
  23
  24     struct _ioinfo *prev;
  25     struct _ioinfo *next;
  26
  27     __u8          st;            /* subchannel type */
  28
  29     union {
  30        unsigned int info;
  31        struct {
  32           unsigned int  busy      : 1;  /* device currently in use */
  33           unsigned int  oper      : 1;  /* device is operational */
  34           unsigned int  fast      : 1;  /* post with "channel end", ...    */
  35                                         /* ... don't wait for "device end" */
  36                                         /* ... from do_IO() parameters     */
  37           unsigned int  ready     : 1;  /* interrupt handler registered */
  38           unsigned int  haltio    : 1;  /* halt_IO in process */
  39           unsigned int  doio      : 1;  /* do_IO in process */
  40           unsigned int  w4final   : 1;  /* wait for final status, internally */
  41                                         /* ... used with 'fast' setting only */
  42           unsigned int  repall    : 1;  /* report every interrupt status */
  43           unsigned int  unready   : 1;  /* deregister irq handler in process */
  44           unsigned int  d_disable : 1;  /* delayed disabling required */
  45           unsigned int  w4sense   : 1;  /* SENSE status pending */
  46           unsigned int  syncio    : 1;  /* synchronous I/O requested */
  47           unsigned int  consns    : 1;  /* concurrent sense is available */
  48           unsigned int  delsense  : 1;  /* delayed SENSE required */
  49           unsigned int  s_pend    : 1;  /* status pending condition */
  50           unsigned int  pgid      : 1;  /* "path group ID" is valid */
  51           unsigned int  pgid_supp : 1;  /* "path group ID" command is supported */
  52           unsigned int  esid      : 1;  /* Ext. SenseID supported by HW */
  53           unsigned int  repnone   : 1;  /* don't call IRQ handler on interrupt */
  54           unsigned int  newreq    : 1;  /* new register interface */
  55           unsigned int  dval      : 1;  /* device number valid */
  56           unsigned int  unknown   : 1;  /* unknown device - if SenseID failed */
  57           unsigned int  unfriendly: 1;  /* device is locked by someone else */
  58           unsigned int  killio    : 1;  /* currently killing pending io */
  59           unsigned int  noio      : 1;  /* don't let drivers start io */
  60           unsigned int  notacccap : 1;  /* capable of handling DEVSTAT_NOT_ACC */
  61           unsigned int  unused    : (sizeof(unsigned int)*8 - 26); /* unused */
  62              } __attribute__ ((packed)) flags;
  63        } ui;
  64
  65     unsigned long u_intparm;     /* user interruption parameter */
  66     senseid_t     senseid;       /* SenseID info */
  67     irq_desc_t    irq_desc;      /* irq descriptor */
  68     not_oper_handler_func_t nopfunc;   /* not oper handler */          
  69     __u8          opm;           /* path mask of operational paths */
  70     __u16         devno;         /* device number */
  71     pgid_t        pgid;          /* path group ID */
  72     schib_t       schib;         /* subchannel information block */
  73     orb_t         orb;           /* operation request block */
  74     devstat_t     devstat;       /* device status */
  75     ccw1_t        senseccw;      /* ccw for sense command */
  76     __u8          sense_data[32];/* buffer for basic sense */
  77     unsigned int  stctl;         /* accumulated status control from irb */
  78     ssd_info_t    ssd_info;      /* subchannel description */
  79     struct tq_struct pver_bh;    /* path verification bottom half task */
  80     atomic_t      pver_pending;  /* != 0 if path verification for sch is pending */
  81} __attribute__ ((aligned(8))) ioinfo_t;
  82
  83#define IOINFO_FLAGS_BUSY    0x80000000
  84#define IOINFO_FLAGS_OPER    0x40000000
  85#define IOINFO_FLAGS_FAST    0x20000000
  86#define IOINFO_FLAGS_READY   0x10000000
  87#define IOINFO_FLAGS_HALTIO  0x08000000
  88#define IOINFO_FLAGS_DOIO    0x04000000
  89#define IOINFO_FLAGS_DOIO_Q  0x02000000
  90#define IOINFO_FLAGS_W4FINAL 0x01000000
  91#define IOINFO_FLAGS_REPALL  0x00800000
  92
  93extern ioinfo_t *ioinfo[];
  94int s390_set_private_data(int irq, void * data);
  95void * s390_get_private_data(int irq);
  96
  97#define CHSC_SEI_ACC_CHPID        1
  98#define CHSC_SEI_ACC_LINKADDR     2
  99#define CHSC_SEI_ACC_FULLLINKADDR 3
 100
 101#define CIO_PATHGONE_WAIT4INT     0x01
 102#define CIO_PATHGONE_IOERR        0x02
 103#define CIO_PATHGONE_DEVGONE      0x04
 104
 105#endif  /* __s390io_h */
 106
 107