xdvar.h revision 1.6 
1/*	$NetBSD: xdvar.h,v 1.6 2000/01/21 23:39:55 thorpej Exp $	*/
2
3/*
4 *
5 * Copyright (c) 1995 Charles D. Cranor
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *      This product includes software developed by Charles D. Cranor.
19 * 4. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34/*
35 * x d v a r . h
36 *
37 * this file defines the software structure we use to control the
38 * 753/7053.
39 *
40 * author: Chuck Cranor <chuck@ccrc.wustl.edu>
41 */
42
43/*
44 * i/o request: wrapper for hardware's iopb data structure
45 */
46
47struct xd_iorq {
48  struct xd_iopb *iopb;             /* address of matching iopb */
49  struct xdc_softc *xdc;            /* who we are working with */
50  struct xd_softc *xd;              /* which disk */
51  int ttl;                          /* time to live */
52  int mode;                         /* current mode (state+other data) */
53  int tries;                        /* number of times we have tried it */
54  int errno;                        /* error number if we fail */
55  int lasterror;		    /* last error we got */
56  int blockno;                      /* starting block no for this xfer */
57  int sectcnt;                      /* number of sectors in xfer */
58  char *dbuf;                       /* KVA of data buffer (advances) */
59  char *dbufbase;                   /* base of dbuf */
60  struct buf *buf;                  /* for NORM */
61};
62
63/*
64 * state
65 */
66
67#define XD_SUB_MASK 0xf0            /* mask bits for state */
68#define XD_SUB_FREE 0x00            /* free */
69#define XD_SUB_NORM 0x10            /* normal I/O request */
70#define XD_SUB_WAIT 0x20            /* normal I/O request in the
71                                             context of a process */
72#define XD_SUB_POLL 0x30            /* polled mode */
73#define XD_SUB_DONE 0x40            /* not active, but can't be free'd yet */
74#define XD_SUB_NOQ  0x50            /* don't queue, just submit (internal) */
75
76#define XD_STATE(X) ((X) & XD_SUB_MASK) /* extract state from mode */
77#define XD_NEWSTATE(OLD, NEW) (((OLD) & ~XD_SUB_MASK) |(NEW)) /* new state */
78
79
80/*
81 * other mode data
82 */
83
84#define XD_MODE_VERBO 0x08          /* print error messages */
85#define XD_MODE_B144  0x04          /* handling a bad144 sector */
86
87
88/*
89 * software timers and flags
90 */
91
92#define XDC_SUBWAITLIM 4   /* max number of "done" IOPBs there can be
93				where we still allow a SUB_WAIT command */
94#define XDC_TICKCNT (5*hz) /* call xdc_tick on this interval (5 sec) */
95#define XDC_MAXTTL     2   /* max number of xd ticks to live */
96#define XDC_NOUNIT (-1)    /* for xdcmd: no unit number */
97
98/*
99 * a "xd_softc" structure contains per-disk state info.
100 */
101
102struct xd_softc {
103  struct device sc_dev;            /* device struct, reqd by autoconf */
104  struct disk sc_dk;               /* generic disk info */
105  struct xdc_softc *parent;        /* parent */
106  u_short flags;                   /* flags */
107  u_short state;                   /* device state */
108  int xd_drive;                    /* unit number */
109  /* geometry */
110  u_short ncyl, acyl, pcyl;        /* number of cyl's */
111  u_short sectpercyl;              /* nhead*nsect */
112  u_char nhead;                    /* number of heads */
113  u_char nsect;                    /* number of sectors per track */
114  u_char hw_spt;                   /* as above, but includes spare sectors */
115  struct dkbad dkb;                /* bad144 sectors */
116};
117
118/*
119 * flags
120 */
121
122#define XD_WLABEL 0x0001           /* write label */
123/*
124 * state
125 */
126
127#define XD_DRIVE_UNKNOWN 0         /* never talked to it */
128#define XD_DRIVE_ATTACHING 1       /* attach in progress */
129#define XD_DRIVE_NOLABEL 2         /* drive on-line, no label */
130#define XD_DRIVE_ONLINE  3         /* drive is on-line */
131
132/*
133 * a "xdc_softc" structure contains per-disk-controller state info,
134 * including a list of active controllers.
135 */
136
137struct xdc_softc {
138  struct device sc_dev;            /* device struct, reqd by autoconf */
139  struct evcnt sc_intrcnt;         /* event counter (for vmstat -i) */
140
141  struct xdc *xdc;                 /* vaddr of vme registers */
142
143  int bustype;                     /* from attach args */
144  int ipl;                         /* interrupt level */
145  int vector;                      /* interrupt vector */
146
147  struct xd_softc *sc_drives[XDC_MAXDEV];   /* drives on this controller */
148
149  struct xd_iorq *reqs;            /* i/o requests */
150  struct xd_iopb *iopbase;         /* iopb base addr (maps iopb->iorq) */
151  struct xd_iopb *dvmaiopb;        /* iopb base in DVMA space, not kvm */
152  struct buf_queue sc_wq;	   /* queue'd IOPBs for this controller */
153  char freereq[XDC_MAXIOPB];       /* free list (stack) */
154  char waitq[XDC_MAXIOPB];         /* wait queue */
155  u_char nfree;                    /* number of iopbs free */
156  u_char nrun;                     /* number running */
157  u_char nwait;                    /* number of waiting iopbs */
158  u_char ndone;                    /* number of done IORQs */
159  u_char waithead;                 /* head of queue */
160  u_char waitend;                  /* end of queue */
161};
162
163/*
164 * reset blast modes
165 */
166
167#define XD_RSET_NONE (-1)          /* restart all requests */
168#define XD_RSET_ALL  (-2)          /* don't restart anything */
169