xyvar.h revision 1.4 
1/*	$NetBSD: xyvar.h,v 1.4 1999/06/30 15:07:45 drochner 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 y v a r . h
36 *
37 * this file defines the software structure we use to control the
38 * 450/451.
39 *
40 * author: Chuck Cranor <chuck@ccrc.wustl.edu>
41 */
42
43/*
44 * i/o request: wrapper for hardware's iopb data structure
45 */
46struct xy_iorq {
47	struct xy_iopb *iopb;	/* address of matching iopb */
48	struct xy_iopb *dmaiopb;/* DMA address of above */
49	struct xyc_softc *xyc;	/* who we are working with */
50	struct xy_softc *xy;	/* 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	struct buf *buf;	/* for NORM */
60	bus_dmamap_t dmamap;	/* DMA I/O handle */
61};
62
63/*
64 * state
65 */
66#define XY_SUB_MASK	0xf0	/* mask bits for state */
67#define XY_SUB_FREE	0x00	/* free */
68#define XY_SUB_NORM	0x10	/* normal I/O request */
69#define XY_SUB_WAIT	0x20	/* normal I/O request in the
70                                   context of a process */
71#define XY_SUB_POLL	0x30	/* polled mode */
72#define XY_SUB_DONE	0x40	/* not active, but can't be free'd yet */
73#define XY_SUB_NOQ	0x50	/* don't queue, just submit (internal) */
74
75#define XY_STATE(X) ((X) & XY_SUB_MASK) /* extract state from mode */
76#define XY_NEWSTATE(OLD, NEW) (((OLD) & ~XY_SUB_MASK) |(NEW)) /* new state */
77
78
79/*
80 * other mode data
81 */
82#define XY_MODE_VERBO	0x08	/* print error messages */
83#define XY_MODE_B144	0x04	/* handling a bad144 sector */
84
85
86/*
87 * software timers and flags
88 */
89#define XYC_SUBWAITLIM	4	/* max number of "done" IOPBs there can be
90				   where we still allow a SUB_WAIT command */
91#define XYC_TICKCNT	(5*hz)	/* call xyc_tick on this interval (5 sec) */
92#define XYC_MAXTTL	2	/* max number of xy ticks to live */
93#define XYC_NOUNIT	(-1)	/* for xycmd: no unit number */
94
95/*
96 * a "xy_softc" structure contains per-disk state info.
97 */
98struct xy_softc {
99	struct device sc_dev;	/* device struct, reqd by autoconf */
100	struct disk sc_dk;	/* generic disk info */
101	struct xyc_softc *parent;/* parent */
102	u_short flags;		/* flags */
103	u_short state;		/* device state */
104	int xy_drive;		/* unit number */
105	int drive_type;		/* drive type (as per disk) */
106
107	/* geometry */
108	u_short ncyl, acyl, pcyl;	/* number of cyl's */
109	u_short sectpercyl;	/* nhead*nsect */
110	u_char nhead;		/* number of heads */
111	u_char nsect;		/* number of sectors per track */
112	u_char hw_spt;		/* as above, but includes spare sectors */
113	struct xy_iorq *xyrq;	/* this disk's ioreq structure */
114	struct buf xyq;		/* queue'd I/O requests */
115	struct dkbad dkb;	/* bad144 sectors */
116};
117
118/*
119 * flags
120 */
121
122#define XY_WLABEL 0x0001           /* write label */
123/*
124 * state
125 */
126
127#define XY_DRIVE_UNKNOWN 0         /* never talked to it */
128#define XY_DRIVE_ATTACHING 1       /* attach in progress */
129#define XY_DRIVE_NOLABEL 2         /* drive on-line, no label */
130#define XY_DRIVE_ONLINE  3         /* drive is on-line */
131
132/*
133 * a "xyc_softc" structure contains per-disk-controller state info,
134 * including a list of active controllers.
135 */
136
137struct xyc_softc {
138	struct device sc_dev;            /* device struct, reqd by autoconf */
139	struct evcnt sc_intrcnt;         /* event counter (for vmstat -i) */
140
141	struct xyc *xyc;                 /* vaddr of vme registers */
142
143	struct xy_softc *sc_drives[XYC_MAXDEV]; /* drives on this controller */
144	int ipl;                         /* interrupt level */
145	int vector;                      /* interrupt vector */
146	bus_dma_tag_t dmatag;	 	 /* Bus DMA tag */
147
148	struct xy_iorq *reqs;            /* i/o requests */
149	struct xy_iopb *iopbase;         /* iopb base addr (maps iopb->iorq) */
150	struct xy_iopb *dvmaiopb;        /* iopb base in DVMA space, not kvm */
151
152	struct xy_iorq *ciorq;		 /* controller's iorq */
153	struct xy_iopb *ciopb;		 /* controller's iopb */
154
155	int xy_hand;			 /* hand */
156	struct xy_iorq *xy_chain[XYC_MAXIOPB];
157				   /* current chain */
158	int no_ols;		   /* disable overlap seek for stupid 450s */
159};
160
161/*
162 * reset blast modes
163 */
164
165#define XY_RSET_NONE (struct xy_iorq *)(-1)   /* restart all requests */
166#define XY_RSET_ALL  (struct xy_iorq *)(-2)   /* don't restart anything */
167