dev_tape.c revision 1.1.8.2
1 /* $NetBSD: dev_tape.c,v 1.1.8.2 2001/06/14 12:57:18 fredette 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 * 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 * This module implements a "raw device" interface suitable for 41 * use by the stand-alone I/O library UFS file-system code, and 42 * possibly for direct access (i.e. boot from tape). 43 * 44 * The implementation is deceptively simple because it uses the 45 * drivers provided by the Sun PROM monitor. Note that only the 46 * PROM driver used to load the boot program is available here. 47 */ 48 49 #include <sys/types.h> 50 #include <machine/mon.h> 51 #include <machine/stdarg.h> 52 #include <stand.h> 53 54 #include "libsa.h" 55 #include "dvma.h" 56 #include "saio.h" 57 #include "dev_tape.h" 58 59 extern int debug; 60 61 struct saioreq tape_ioreq; 62 63 /* 64 * This is a special version of devopen() for tape boot. 65 * In this version, the file name is a numeric string of 66 * one digit, which is passed to the device open so it 67 * can open the appropriate tape segment. 68 */ 69 int 70 devopen(f, fname, file) 71 struct open_file *f; 72 const char *fname; /* normally "1" */ 73 char **file; 74 { 75 struct devsw *dp; 76 int error; 77 78 *file = (char*)fname; 79 dp = &devsw[0]; 80 f->f_dev = dp; 81 82 /* The following will call tape_open() */ 83 return (dp->dv_open(f, fname)); 84 } 85 86 int 87 tape_open(struct open_file *f, ...) 88 { 89 struct bootparam *bp; 90 struct saioreq *si; 91 int error, part; 92 char *fname; /* partition number, i.e. "1" */ 93 va_list ap; 94 95 va_start(ap, f); 96 fname = va_arg(ap, char *); 97 #ifdef DEBUG 98 printf("tape_open: part=%s\n", fname); 99 #endif 100 va_end(ap); 101 102 /* 103 * Set the tape segment number to the one indicated 104 * by the single digit fname passed in above. 105 */ 106 if ((fname[0] < '0') && (fname[0] > '9')) { 107 return ENOENT; 108 } 109 part = fname[0] - '0'; 110 111 /* 112 * Setup our part of the saioreq. 113 * (determines what gets opened) 114 */ 115 si = &tape_ioreq; 116 bzero((caddr_t)si, sizeof(*si)); 117 118 bp = *romVectorPtr->bootParam; 119 si->si_boottab = bp->bootDevice; 120 si->si_ctlr = bp->ctlrNum; 121 si->si_unit = bp->unitNum; 122 si->si_boff = part; /* default = bp->partNum + 1; */ 123 124 error = prom_iopen(si); 125 126 #ifdef DEBUG 127 printf("tape_open: prom_iopen returned 0x%x\n", error); 128 #endif 129 130 if (!error) 131 f->f_devdata = si; 132 133 return (error); 134 } 135 136 int 137 tape_close(f) 138 struct open_file *f; 139 { 140 struct saioreq *si; 141 142 #ifdef DEBUG 143 printf("tape_close: calling prom_iclose\n"); 144 #endif 145 146 si = f->f_devdata; 147 prom_iclose(si); 148 f->f_devdata = NULL; 149 return 0; 150 } 151 152 int 153 tape_strategy(devdata, flag, dblk, size, buf, rsize) 154 void *devdata; 155 int flag; 156 daddr_t dblk; 157 size_t size; 158 void *buf; 159 size_t *rsize; 160 { 161 struct saioreq *si; 162 struct boottab *ops; 163 char *dmabuf; 164 int si_flag, xcnt; 165 166 si = devdata; 167 ops = si->si_boottab; 168 169 #ifdef DEBUG 170 if (debug > 1) 171 printf("tape_strategy: size=%d dblk=%d\n", size, dblk); 172 #endif 173 174 dmabuf = dvma_mapin(buf, size); 175 176 si->si_bn = dblk; 177 si->si_ma = dmabuf; 178 si->si_cc = size; 179 180 si_flag = (flag == F_READ) ? SAIO_F_READ : SAIO_F_WRITE; 181 xcnt = (*ops->b_strategy)(si, si_flag); 182 dvma_mapout(dmabuf, size); 183 184 #ifdef DEBUG 185 if (debug > 1) 186 printf("tape_strategy: xcnt = %x\n", xcnt); 187 #endif 188 189 /* At end of tape, xcnt == 0 (not an error) */ 190 if (xcnt < 0) 191 return (EIO); 192 193 *rsize = xcnt; 194 return (0); 195 } 196 197 int 198 tape_ioctl(f, cmd, data) 199 struct open_file *f; 200 u_long cmd; 201 void *data; 202 { 203 return EIO; 204 } 205 206
Indexes created Tue Sep 30 07:10:03 GMT 2025