FreeBSD/Linux Kernel Cross Reference
sys/dev/scsipi/stvar.h
1 /* $NetBSD: stvar.h,v 1.12 2005/02/01 00:19:34 reinoud Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 /*
40 * Originally written by Julian Elischer (julian@tfs.com)
41 * for TRW Financial Systems for use under the MACH(2.5) operating system.
42 *
43 * TRW Financial Systems, in accordance with their agreement with Carnegie
44 * Mellon University, makes this software available to CMU to distribute
45 * or use in any manner that they see fit as long as this message is kept with
46 * the software. For this reason TFS also grants any other persons or
47 * organisations permission to use or modify this software.
48 *
49 * TFS supplies this software to be publicly redistributed
50 * on the understanding that TFS is not responsible for the correct
51 * functioning of this software in any circumstances.
52 *
53 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
54 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993
55 *
56 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov).
57 */
58
59 #include "rnd.h"
60 #if NRND > 0
61 #include <sys/rnd.h>
62 #endif
63
64 #include <dev/scsipi/scsipi_all.h>
65 #include <dev/scsipi/scsiconf.h>
66
67 #define ST_IO_TIME (3 * 60 * 1000) /* 3 minutes */
68 #define ST_CTL_TIME (30 * 1000) /* 30 seconds */
69 #define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */
70
71 #define ST_RETRIES 4 /* only on non IO commands */
72
73 struct modes {
74 u_int quirks; /* same definitions as in quirkdata */
75 int blksize;
76 u_int8_t density;
77 };
78
79 struct quirkdata {
80 u_int quirks;
81 #define ST_Q_FORCE_BLKSIZE 0x0001
82 #define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */
83 #define ST_Q_IGNORE_LOADS 0x0004
84 #define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */
85 #define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */
86 #define ST_Q_NOPREVENT 0x0020 /* does not support PREVENT */
87 #define ST_Q_ERASE_NOIMM 0x0040 /* drive rejects ERASE/w Immed bit */
88 #define ST_Q_NOFILEMARKS 0x0080 /* can only write 0 filemarks */
89 u_int page_0_size;
90 #define MAX_PAGE_0_SIZE 64
91 struct modes modes[4];
92 };
93
94 struct st_quirk_inquiry_pattern {
95 struct scsipi_inquiry_pattern pattern;
96 struct quirkdata quirkdata;
97 };
98
99 struct st_softc {
100 struct device sc_dev;
101 /*--------------------callback to bus-specific code--------------------------*/
102 int (*ops)(struct st_softc *, int, int);
103 #define ST_OPS_RBL 0x00 /* read block limit */
104 #define ST_OPS_MODESENSE 0x01 /* mode sense */
105 #define ST_OPS_MODESELECT 0x02 /* mode select */
106 #define ST_OPS_CMPRSS_ON 0x03 /* turn on compression */
107 #define ST_OPS_CMPRSS_OFF 0x04 /* turn off compression */
108 /*--------------------present operating parameters, flags etc.---------------*/
109 int flags; /* see below */
110 u_int quirks; /* quirks for the open mode */
111 int blksize; /* blksize we are using */
112 u_int8_t density; /* present density */
113 u_int page_0_size; /* size of page 0 data */
114 u_int last_dsty; /* last density opened */
115 short mt_resid; /* last (short) resid */
116 short mt_erreg; /* last error (sense key) seen */
117 /* relative to BOT location */
118 daddr_t fileno;
119 daddr_t blkno;
120 int32_t last_io_resid;
121 int32_t last_ctl_resid;
122 #define mt_key mt_erreg
123 u_int8_t asc; /* last asc code seen */
124 u_int8_t ascq; /* last asc code seen */
125 /*--------------------device/scsi parameters---------------------------------*/
126 struct scsipi_periph *sc_periph;/* our link to the adpter etc. */
127 /*--------------------parameters reported by the device ---------------------*/
128 int blkmin; /* min blk size */
129 int blkmax; /* max blk size */
130 struct quirkdata *quirkdata; /* if we have a rogue entry */
131 /*--------------------parameters reported by the device for this media-------*/
132 u_long numblks; /* nominal blocks capacity */
133 int media_blksize; /* 0 if not ST_FIXEDBLOCKS */
134 u_int8_t media_density; /* this is what it said when asked */
135 /*--------------------quirks for the whole drive-----------------------------*/
136 u_int drive_quirks; /* quirks of this drive */
137 /*--------------------How we should set up when opening each minor device----*/
138 struct modes modes[4]; /* plus more for each mode */
139 u_int8_t modeflags[4]; /* flags for the modes */
140 #define DENSITY_SET_BY_USER 0x01
141 #define DENSITY_SET_BY_QUIRK 0x02
142 #define BLKSIZE_SET_BY_USER 0x04
143 #define BLKSIZE_SET_BY_QUIRK 0x08
144 /*--------------------storage for sense data returned by the drive-----------*/
145 u_char sense_data[MAX_PAGE_0_SIZE]; /*
146 * additional sense data needed
147 * for mode sense/select.
148 */
149 struct bufq_state buf_queue; /* the queue of pending IO */
150 /* operations */
151 struct callout sc_callout; /* restarting the queue after */
152 /* transient error */
153 #if NRND > 0
154 rndsource_element_t rnd_source;
155 #endif
156 };
157
158 #define ST_INFO_VALID 0x0001
159 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */
160 #define ST_WRITTEN 0x0004 /* data has been written, EOD needed */
161 #define ST_FIXEDBLOCKS 0x0008
162 #define ST_AT_FILEMARK 0x0010
163 #define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */
164 #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */
165 #define ST_READONLY 0x0080 /* st_mode_sense says write protected */
166 #define ST_FM_WRITTEN 0x0100 /*
167 * EOF file mark written -- used with
168 * ~ST_WRITTEN to indicate that multiple file
169 * marks have been written
170 */
171 #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */
172 #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */
173 #define ST_MOUNTED 0x0800 /* Device is presently mounted */
174 #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */
175 #define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */
176 #define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */
177 #define ST_POSUPDATED 0x8000 /* tape position already updated */
178
179 #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \
180 ST_BLANK_READ)
181 #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \
182 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \
183 ST_2FM_AT_EOD | ST_PER_ACTION | ST_POSUPDATED)
184
185 void stattach(struct device *, struct st_softc *, void *);
186 int stactivate(struct device *, enum devact);
187 int stdetach(struct device *, int);
188
189 extern struct cfdriver st_cd;
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