1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* $OpenBSD: xyvar.h,v 1.4 1997/08/08 08:25:41 downsj Exp $ */
/* $NetBSD: xyvar.h,v 1.4 1996/03/31 22:39:04 pk Exp $ */
/*
*
* Copyright (c) 1995 Charles D. Cranor
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* x y v a r . h
*
* this file defines the software structure we use to control the
* 450/451.
*
* author: Chuck Cranor <chuck@ccrc.wustl.edu>
*/
/*
* i/o request: wrapper for hardware's iopb data structure
*/
struct xy_iorq {
struct xy_iopb *iopb; /* address of matching iopb */
struct xyc_softc *xyc; /* who we are working with */
struct xy_softc *xy; /* which disk */
int ttl; /* time to live */
int mode; /* current mode (state+other data) */
int tries; /* number of times we have tried it */
int errno; /* error number if we fail */
int lasterror; /* last error we got */
int blockno; /* starting block no for this xfer */
int sectcnt; /* number of sectors in xfer */
char *dbuf; /* KVA of data buffer (advances) */
char *dbufbase; /* base of dbuf */
struct buf *buf; /* for NORM */
};
/*
* state
*/
#define XY_SUB_MASK 0xf0 /* mask bits for state */
#define XY_SUB_FREE 0x00 /* free */
#define XY_SUB_NORM 0x10 /* normal I/O request */
#define XY_SUB_WAIT 0x20 /* normal I/O request in the
context of a process */
#define XY_SUB_POLL 0x30 /* polled mode */
#define XY_SUB_DONE 0x40 /* not active, but can't be free'd yet */
#define XY_SUB_NOQ 0x50 /* don't queue, just submit (internal) */
#define XY_STATE(X) ((X) & XY_SUB_MASK) /* extract state from mode */
#define XY_NEWSTATE(OLD, NEW) (((OLD) & ~XY_SUB_MASK) |(NEW)) /* new state */
/*
* other mode data
*/
#define XY_MODE_VERBO 0x08 /* print error messages */
#define XY_MODE_B144 0x04 /* handling a bad144 sector */
/*
* software timers and flags
*/
#define XYC_SUBWAITLIM 4 /* max number of "done" IOPBs there can be
where we still allow a SUB_WAIT command */
#define XYC_TICKCNT (5*hz) /* call xyc_tick on this interval (5 sec) */
#define XYC_MAXTTL 2 /* max number of xy ticks to live */
#define XYC_NOUNIT (-1) /* for xycmd: no unit number */
/*
* a "xy_softc" structure contains per-disk state info.
*/
struct xy_softc {
struct device sc_dev; /* device struct, reqd by autoconf */
struct disk sc_dk; /* generic disk info */
struct xyc_softc *parent; /* parent */
u_short flags; /* flags */
u_short state; /* device state */
int xy_drive; /* unit number */
int drive_type; /* drive type (as per disk) */
/* geometry */
u_short ncyl, acyl, pcyl; /* number of cyl's */
u_short sectpercyl; /* nhead*nsect */
u_char nhead; /* number of heads */
u_char nsect; /* number of sectors per track */
u_char hw_spt; /* as above, but includes spare sectors */
struct xy_iorq *xyrq; /* this disk's ioreq structure */
struct buf xyq; /* queue'd I/O requests */
struct dkbad dkb; /* bad144 sectors */
};
/*
* flags
*/
#define XY_WLABEL 0x0001 /* write label */
/*
* state
*/
#define XY_DRIVE_UNKNOWN 0 /* never talked to it */
#define XY_DRIVE_ATTACHING 1 /* attach in progress */
#define XY_DRIVE_NOLABEL 2 /* drive on-line, no label */
#define XY_DRIVE_ONLINE 3 /* drive is on-line */
/*
* a "xyc_softc" structure contains per-disk-controller state info,
* including a list of active controllers.
*/
struct xyc_softc {
struct device sc_dev; /* device struct, reqd by autoconf */
struct intrhand sc_ih; /* interrupt info */
struct evcnt sc_intrcnt; /* event counter (for vmstat -i) */
struct xyc *xyc; /* vaddr of vme registers */
struct xy_softc *sc_drives[XYC_MAXDEV]; /* drives on this controller */
int ipl; /* interrupt level */
int vector; /* interrupt vector */
struct xy_iorq *reqs; /* i/o requests */
struct xy_iopb *iopbase; /* iopb base addr (maps iopb->iorq) */
struct xy_iopb *dvmaiopb; /* iopb base in DVMA space, not kvm */
struct xy_iorq *ciorq; /* controller's iorq */
struct xy_iopb *ciopb; /* controller's iopb */
int xy_hand; /* hand */
struct xy_iorq *xy_chain[XYC_MAXIOPB];
/* current chain */
int no_ols; /* disable overlap seek for stupid 450s */
};
/*
* reset blast modes
*/
#define XY_RSET_NONE (struct xy_iorq *)(-1) /* restart all requests */
#define XY_RSET_ALL (struct xy_iorq *)(-2) /* don't restart anything */
|
