saio.c revision 1.6
1 /* $NetBSD: saio.c,v 1.6 2003/08/07 16:28:38 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)rz.c 8.1 (Berkeley) 6/10/93 35 */ 36 37 #include <lib/libsa/stand.h> 38 #include <lib/libkern/libkern.h> 39 #include <machine/prom.h> 40 #include <machine/stdarg.h> 41 42 #include <sys/param.h> 43 #include <sys/disklabel.h> 44 45 #include "common.h" 46 #include "saio.h" 47 48 struct saio_softc { 49 int sc_fd; /* PROM file id */ 50 int sc_ctlr; /* controller number */ 51 int sc_unit; /* disk unit number */ 52 int sc_part; /* disk partition number */ 53 struct disklabel sc_label; /* disk label for this disk */ 54 }; 55 56 struct io_arg { 57 int retval; 58 unsigned long sectst; 59 unsigned long memaddr; 60 unsigned long datasz; 61 }; 62 63 #define IOB_BUFSZ 512 64 #define IOB_INODESZ 316 65 66 struct device_table { 67 char *dt_string; /* device name */ 68 int (*dt_init) (int); /* device init routine */ 69 int (*dt_open) __P((int)); /* device open routine */ 70 int (*dt_strategy) __P((int)); /* device strategy routine, returns cnt */ 71 int (*dt_close) __P((int)); /* device close routine */ 72 int (*dt_ioctl) __P((int)); /* device ioctl routine */ 73 int dt_type; /* device "type" */ 74 int dt_fs; /* file system type */ 75 char *dt_desc; /* device description */ 76 }; 77 78 struct sa_iob { 79 char i_buf[IOB_BUFSZ]; /* file system or tape header */ 80 char i_ino_dir[IOB_INODESZ]; /* inode or disk/tape directory */ 81 82 int i_flgs; /* see F_ below */ 83 int i_ctlr; /* controller board */ 84 int i_unit; /* pseudo device unit */ 85 int i_part; /* disk partition */ 86 char *i_ma; /* memory address of i/o buffer */ 87 int i_cc; /* character count of transfer */ 88 int32_t i_offset; /* seek offset in file */ 89 /* XXX ondisk32 */ 90 int32_t i_bn; /* 1st block # of next read */ 91 int i_fstype; /* file system type */ 92 int i_errno; /* error # return */ 93 unsigned int i_devaddr; /* csr address */ 94 struct device_table *i_dp; /* pointer into device_table */ 95 char *i_bufp; /* i/o buffer for blk devs */ 96 }__attribute__((__packed__)); 97 98 extern struct sa_iob *saiob[]; 99 100 int 101 saiostrategy(devdata, rw, bn, reqcnt, addr, cnt) 102 void *devdata; 103 int rw; 104 daddr_t bn; 105 size_t reqcnt; 106 void *addr; 107 size_t *cnt; /* out: number of bytes transfered */ 108 { 109 struct saio_softc *sc = (struct saio_softc *)devdata; 110 int part = sc->sc_part; 111 struct partition *pp = &sc->sc_label.d_partitions[part]; 112 int s; 113 long offset; 114 struct sa_iob *iob; 115 116 offset = bn * DEV_BSIZE; 117 *cnt = 0; 118 119 /* 120 * Partial-block transfers not handled. 121 */ 122 if (reqcnt & (DEV_BSIZE - 1)) { 123 return (EINVAL); 124 } 125 offset += pp->p_offset * DEV_BSIZE; 126 127 iob = saiob[sc->sc_fd]; 128 iob->i_offset = offset; 129 130 #if notyet 131 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 132 return (EIO); 133 #endif 134 135 while (*cnt < reqcnt) { 136 s = prom_read(sc->sc_fd, iob->i_buf, 512); 137 if (s < 0) { 138 return (EIO); 139 } 140 memcpy(addr, iob->i_buf, s); 141 *cnt += s; 142 (char *)addr += s; 143 } 144 return (0); 145 } 146 147 int 148 saioopen(struct open_file *f, ...) 149 { 150 int ctlr, unit, part; 151 152 struct saio_softc *sc; 153 struct disklabel *lp; 154 int i; 155 char *msg; 156 char buf[DEV_BSIZE]; 157 int cnt; 158 static char device[] = "dksd(0,0,10)"; 159 160 va_list ap; 161 162 va_start(ap, f); 163 164 ctlr = va_arg(ap, int); 165 unit = va_arg(ap, int); 166 part = va_arg(ap, int); 167 168 va_end(ap); 169 170 device[5] = '0' + ctlr; 171 device[7] = '0' + unit; 172 173 i = prom_open(device, 0); 174 if (i < 0) { 175 printf("open failed\n"); 176 return (ENXIO); 177 } 178 179 sc = alloc(sizeof(struct saio_softc)); 180 memset(sc, 0, sizeof(struct saio_softc)); 181 f->f_devdata = (void *)sc; 182 183 sc->sc_fd = i; 184 sc->sc_ctlr = ctlr; 185 sc->sc_unit = unit; 186 sc->sc_part = part; 187 188 /* try to read disk label and partition table information */ 189 lp = &sc->sc_label; 190 lp->d_secsize = DEV_BSIZE; 191 lp->d_secpercyl = 1; 192 lp->d_npartitions = MAXPARTITIONS; 193 lp->d_partitions[part].p_offset = 0; 194 lp->d_partitions[part].p_size = 0x7fffffff; 195 196 i = saiostrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 197 if (i || cnt != DEV_BSIZE) { 198 printf("%s: error reading disk label\n", device); 199 goto bad; 200 } 201 202 msg = getdisklabel(buf, lp); 203 if (msg) { 204 #ifdef LIBSA_NO_DISKLABEL_MSGS 205 printf("%s: no disklabel\n", device); 206 #else 207 printf("getlabel: %s\n", msg); 208 #endif 209 return (0); 210 } 211 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 212 bad: 213 free(sc, sizeof(struct saio_softc)); 214 return (ENXIO); 215 } 216 return (0); 217 } 218 219 #ifndef LIBSA_NO_DEV_CLOSE 220 int 221 saioclose(f) 222 struct open_file *f; 223 { 224 225 prom_close(((struct saio_softc *)f->f_devdata)->sc_fd); 226 free(f->f_devdata, sizeof(struct saio_softc)); 227 f->f_devdata = (void *)0; 228 return (0); 229 } 230 #endif 231
Indexes created Fri Sep 26 08:10:20 GMT 2025