1 /* $NetBSD: dev_tape.c,v 1.6 2011/07/17 20:54:48 joerg 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 Paul Kranenburg.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * This module implements a "raw device" interface suitable for
34 * use by the stand-alone I/O library UFS file-system code, and
35 * possibly for direct access (i.e. boot from tape).
36 *
37 * The implementation is deceptively simple because it uses the
38 * drivers provided by the Sun PROM monitor. Note that only the
39 * PROM driver used to load the boot program is available here.
40 */
41
42 #include <sys/types.h>
43 #include <machine/mon.h>
44 #include <stand.h>
45
46 #include "libsa.h"
47 #include "dvma.h"
48 #include "saio.h"
49 #include "dev_tape.h"
50
51 extern int debug;
52
53 struct saioreq tape_ioreq;
54
55 /*
56 * This is a special version of devopen() for tape boot.
57 * In this version, the file name is a numeric string of
58 * one digit, which is passed to the device open so it
59 * can open the appropriate tape segment.
60 */
61 int
devopen(struct open_file * f,const char * fname,char ** file)62 devopen(struct open_file *f, const char *fname, char **file)
63 {
64 struct devsw *dp;
65
66 *file = (char *)fname;
67 dp = &devsw[0];
68 f->f_dev = dp;
69
70 /* The following will call tape_open() */
71 return (dp->dv_open(f, fname));
72 }
73
74 int
tape_open(struct open_file * f,...)75 tape_open(struct open_file *f, ...)
76 {
77 struct bootparam *bp;
78 struct saioreq *si;
79 int error, part;
80 char *fname; /* partition number, i.e. "1" */
81 va_list ap;
82
83 va_start(ap, f);
84 fname = va_arg(ap, char *);
85 #ifdef DEBUG
86 printf("tape_open: part=%s\n", fname);
87 #endif
88 va_end(ap);
89
90 /*
91 * Set the tape segment number to the one indicated
92 * by the single digit fname passed in above.
93 */
94 if ((fname[0] < '0') && (fname[0] > '9')) {
95 return ENOENT;
96 }
97 part = fname[0] - '0';
98
99 /*
100 * Setup our part of the saioreq.
101 * (determines what gets opened)
102 */
103 si = &tape_ioreq;
104 memset(si, 0, sizeof(*si));
105
106 bp = *romVectorPtr->bootParam;
107 si->si_boottab = bp->bootDevice;
108 si->si_ctlr = bp->ctlrNum;
109 si->si_unit = bp->unitNum;
110 si->si_boff = part; /* default = bp->partNum + 1; */
111
112 error = prom_iopen(si);
113
114 #ifdef DEBUG
115 printf("tape_open: prom_iopen returned 0x%x\n", error);
116 #endif
117
118 if (!error)
119 f->f_devdata = si;
120
121 return (error);
122 }
123
124 int
tape_close(struct open_file * f)125 tape_close(struct open_file *f)
126 {
127 struct saioreq *si;
128
129 #ifdef DEBUG
130 printf("tape_close: calling prom_iclose\n");
131 #endif
132
133 si = f->f_devdata;
134 prom_iclose(si);
135 f->f_devdata = NULL;
136 return 0;
137 }
138
139 int
tape_strategy(void * devdata,int flag,daddr_t dblk,size_t size,void * buf,size_t * rsize)140 tape_strategy(void *devdata, int flag, daddr_t dblk, size_t size, void *buf,
141 size_t *rsize)
142 {
143 struct saioreq *si;
144 struct boottab *ops;
145 char *dmabuf;
146 int si_flag, xcnt;
147
148 si = devdata;
149 ops = si->si_boottab;
150
151 #ifdef DEBUG
152 if (debug > 1)
153 printf("tape_strategy: size=%d dblk=%d\n", size, dblk);
154 #endif
155
156 dmabuf = dvma_mapin(buf, size);
157
158 si->si_bn = dblk;
159 si->si_ma = dmabuf;
160 si->si_cc = size;
161
162 si_flag = (flag == F_READ) ? SAIO_F_READ : SAIO_F_WRITE;
163 xcnt = (*ops->b_strategy)(si, si_flag);
164 dvma_mapout(dmabuf, size);
165
166 #ifdef DEBUG
167 if (debug > 1)
168 printf("tape_strategy: xcnt = %x\n", xcnt);
169 #endif
170
171 /* At end of tape, xcnt == 0 (not an error) */
172 if (xcnt < 0)
173 return (EIO);
174
175 *rsize = xcnt;
176 return (0);
177 }
178
179 int
tape_ioctl(struct open_file * f,u_long cmd,void * data)180 tape_ioctl(struct open_file *f, u_long cmd, void *data)
181 {
182 return EIO;
183 }
184
185