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
12/*
13 * IRQ data structure used by I/O subroutines
14 *
15 * Note : If bit flags are added, the "unused" value must be
16 *        decremented accordingly !
17 */
18typedef struct _ioinfo {
19     unsigned int  irq;           /* aka. subchannel number */
20     spinlock_t    irq_lock;      /* irq lock */
21     void          *private_data; /* pointer to private data */
22
23     struct _ioinfo *prev;
24     struct _ioinfo *next;
25
26     __u8          st;            /* subchannel type */
27
28     union {
29        unsigned int info;
30        struct {
31           unsigned int  busy      : 1;  /* device currently in use */
32           unsigned int  oper      : 1;  /* device is operational */
33           unsigned int  fast      : 1;  /* post with "channel end", ...    */
34                                         /* ... don't wait for "device end" */
35                                         /* ... from do_IO() parameters     */
36           unsigned int  ready     : 1;  /* interrupt handler registered */
37           unsigned int  haltio    : 1;  /* halt_IO in process */
38           unsigned int  doio      : 1;  /* do_IO in process */
39           unsigned int  doio_q    : 1;  /* do_IO queued - only possible ... */
40                                         /* ... if 'fast' is set too */
41           unsigned int  w4final   : 1;  /* wait for final status, internally */
42                                         /* ... used with 'fast' setting only */
43           unsigned int  repall    : 1;  /* report every interrupt status */
44           unsigned int  unready   : 1;  /* deregister irq handler in process */
45           unsigned int  d_disable : 1;  /* delayed disabling required */
46           unsigned int  w4sense   : 1;  /* SENSE status pending */
47           unsigned int  syncio    : 1;  /* synchronous I/O requested */
48           unsigned int  consns    : 1;  /* concurrent sense is available */
49           unsigned int  delsense  : 1;  /* delayed SENSE required */
50           unsigned int  s_pend    : 1;  /* status pending condition */
51           unsigned int  pgid      : 1;  /* "path group ID" is valid */
52           unsigned int  pgid_supp : 1;  /* "path group ID" command is supported */
53           unsigned int  esid      : 1;  /* Ext. SenseID supported by HW */
54           unsigned int  rcd       : 1;  /* RCD supported by HW */
55           unsigned int  repnone   : 1;  /* don't call IRQ handler on interrupt */
56           unsigned int  newreq    : 1;  /* new register interface */
57           unsigned int  dval      : 1;  /* device number valid */
58           unsigned int  unknown   : 1;  /* unknown device - if SenseID failed */
59	   unsigned int  unfriendly: 1;  /* device is locked by someone else */
60           unsigned int  unused    : (sizeof(unsigned int)*8 - 25); /* unused */
61              } __attribute__ ((packed)) flags;
62        } ui;
63
64     unsigned long u_intparm;     /* user interruption parameter */
65     senseid_t     senseid;       /* SenseID info */
66     irq_desc_t    irq_desc;      /* irq descriptor */
67     not_oper_handler_func_t nopfunc; 	/* not oper handler */
68     __u8          ulpm;          /* logical path mask used for I/O */
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       *qcpa;          /* queued channel program */
76     ccw1_t        senseccw;      /* ccw for sense command */
77     __u8          sense_data[32];/* buffer for basic sense */
78     unsigned int  stctl;         /* accumulated status control from irb */
79     unsigned long qintparm;      /* queued interruption parameter  */
80     unsigned long qflag;         /* queued flags */
81     __u8          qlpm;          /* queued logical path mask */
82     ssd_info_t    ssd_info;      /* subchannel description */
83
84   } __attribute__ ((aligned(8))) ioinfo_t;
85
86#define IOINFO_FLAGS_BUSY    0x80000000
87#define IOINFO_FLAGS_OPER    0x40000000
88#define IOINFO_FLAGS_FAST    0x20000000
89#define IOINFO_FLAGS_READY   0x10000000
90#define IOINFO_FLAGS_HALTIO  0x08000000
91#define IOINFO_FLAGS_DOIO    0x04000000
92#define IOINFO_FLAGS_DOIO_Q  0x02000000
93#define IOINFO_FLAGS_W4FINAL 0x01000000
94#define IOINFO_FLAGS_REPALL  0x00800000
95
96extern ioinfo_t *ioinfo[];
97int s390_set_private_data(int irq, void * data);
98void * s390_get_private_data(int irq);
99
100#define CHSC_SEI_ACC_CHPID        1
101#define CHSC_SEI_ACC_LINKADDR     2
102#define CHSC_SEI_ACC_FULLLINKADDR 3
103
104#endif  /* __s390io_h */
105
106