1 /* $NetBSD: dev_tape.c,v 1.5 2001/07/07 09:06:43 scw 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 45 #include <sys/types.h> 46 #include <machine/prom.h> 47 #include <machine/stdarg.h> 48 49 #include <lib/libkern/libkern.h> 50 51 #include "stand.h" 52 #include "libsa.h" 53 #include "dev_tape.h" 54 55 extern int debug; 56 57 struct mvmeprom_dskio tape_ioreq; 58 59 static int hackprom_diskrd(struct mvmeprom_dskio *); 60 61 /* 62 * This is a special version of devopen() for tape boot. 63 * In this version, the file name is a numeric string of 64 * one digit, which is passed to the device open so it 65 * can open the appropriate tape segment. 66 */ 67 int 68 devopen(f, fname, file) 69 struct open_file *f; 70 const char *fname; /* normally "1" */ 71 char **file; 72 { 73 struct devsw *dp; 74 75 *file = (char*)fname; 76 dp = &devsw[0]; 77 f->f_dev = dp; 78 79 /* The following will call tape_open() */ 80 return (dp->dv_open(f, fname)); 81 } 82 83 int 84 tape_open(struct open_file *f, ...) 85 { 86 char *fname; /* partition number, i.e. "1" */ 87 int part; 88 struct mvmeprom_dskio *ti; 89 va_list ap; 90 91 va_start(ap, f); 92 fname = va_arg(ap, char *); 93 va_end(ap); 94 95 /* 96 * Set the tape segment number to the one indicated 97 * by the single digit fname passed in above. 98 */ 99 if ((fname[0] < '0') && (fname[0] > '9')) { 100 return ENOENT; 101 } 102 part = fname[0] - '0'; 103 104 /* 105 * Setup our part of the saioreq. 106 * (determines what gets opened) 107 */ 108 ti = &tape_ioreq; 109 memset((caddr_t)ti, 0, sizeof(*ti)); 110 111 ti->ctrl_lun = bugargs.ctrl_lun; 112 ti->dev_lun = bugargs.dev_lun; 113 ti->status = 0; 114 ti->pbuffer = NULL; 115 ti->blk_num = part; 116 ti->blk_cnt = 0; 117 ti->flag = 0; 118 ti->addr_mod = 0; 119 120 f->f_devdata = ti; 121 122 return (0); 123 } 124 125 int 126 tape_close(f) 127 struct open_file *f; 128 { 129 struct mvmeprom_dskio *ti; 130 131 132 ti = f->f_devdata; 133 f->f_devdata = NULL; 134 return 0; 135 } 136 137 #define MVMEPROM_SCALE (512/MVMEPROM_BLOCK_SIZE) 138 139 int 140 tape_strategy(devdata, flag, dblk, size, buf, rsize) 141 void *devdata; 142 int flag; 143 daddr_t dblk; 144 u_int size; 145 void *buf; 146 u_int *rsize; 147 { 148 struct mvmeprom_dskio *ti; 149 int ret; 150 151 ti = devdata; 152 153 if (flag != F_READ) 154 return(EROFS); 155 156 ti->status = 0; 157 ti->pbuffer = buf; 158 /* don't change block #, set in open */ 159 ti->blk_cnt = size / (512 / MVMEPROM_SCALE); 160 161 /* work around for stupid '147 prom bug */ 162 if ( bugargs.cputyp == 0x147 ) 163 ret = hackprom_diskrd(ti); 164 else 165 ret = mvmeprom_diskrd(ti); 166 167 if (ret != 0) 168 return (EIO); 169 170 *rsize = (ti->blk_cnt / MVMEPROM_SCALE) * 512; 171 ti->flag |= IGNORE_FILENUM; /* ignore next time */ 172 173 return (0); 174 } 175 176 int 177 tape_ioctl(struct open_file *f, u_long cmd, void * data) 178 { 179 return EIO; 180 } 181 182 static int 183 hackprom_diskrd(struct mvmeprom_dskio *ti) 184 { 185 static int blkoffset = 0; 186 187 #define hackload_addr ((char *) 0x080000) /* Load tape segment here */ 188 #define hackload_blocks 0x2000 /* 2Mb worth */ 189 190 if ( (ti->flag & IGNORE_FILENUM) == 0 ) { 191 /* 192 * First time through. Load the whole tape segment... 193 */ 194 struct mvmeprom_dskio nti; 195 int ret; 196 197 nti = *ti; 198 199 nti.pbuffer = hackload_addr; 200 nti.blk_cnt = hackload_blocks; 201 nti.flag |= END_OF_FILE; 202 203 ret = mvmeprom_diskrd(&nti); 204 205 /* 206 * PROM returns 1 on end-of-file. This isn't an 207 * error in this instance, just in case you're wondering! ;-) 208 */ 209 if ( ret < 0 || ret > 1 ) 210 return ret; 211 212 blkoffset = 0; 213 } 214 215 /* 216 * Grab the required number of block(s) 217 */ 218 memcpy(ti->pbuffer, &(hackload_addr[blkoffset]), 219 ti->blk_cnt * MVMEPROM_BLOCK_SIZE); 220 221 blkoffset += (ti->blk_cnt * MVMEPROM_BLOCK_SIZE); 222 223 return 0; 224 } 225