saio.c revision 1.5
1 /* $NetBSD: saio.c,v 1.5 2003/01/24 21:55:13 fvdl 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)rz.c 8.1 (Berkeley) 6/10/93 39 */ 40 41 #include <lib/libsa/stand.h> 42 #include <lib/libkern/libkern.h> 43 #include <machine/prom.h> 44 #include <machine/stdarg.h> 45 46 #include <sys/param.h> 47 #include <sys/disklabel.h> 48 49 #include "common.h" 50 #include "saio.h" 51 52 struct saio_softc { 53 int sc_fd; /* PROM file id */ 54 int sc_ctlr; /* controller number */ 55 int sc_unit; /* disk unit number */ 56 int sc_part; /* disk partition number */ 57 struct disklabel sc_label; /* disk label for this disk */ 58 }; 59 60 struct io_arg { 61 int retval; 62 unsigned long sectst; 63 unsigned long memaddr; 64 unsigned long datasz; 65 }; 66 67 #define IOB_BUFSZ 512 68 #define IOB_INODESZ 316 69 70 struct device_table { 71 char *dt_string; /* device name */ 72 int (*dt_init) (int); /* device init routine */ 73 int (*dt_open) __P((int)); /* device open routine */ 74 int (*dt_strategy) __P((int)); /* device strategy routine, returns cnt */ 75 int (*dt_close) __P((int)); /* device close routine */ 76 int (*dt_ioctl) __P((int)); /* device ioctl routine */ 77 int dt_type; /* device "type" */ 78 int dt_fs; /* file system type */ 79 char *dt_desc; /* device description */ 80 }; 81 82 struct sa_iob { 83 char i_buf[IOB_BUFSZ]; /* file system or tape header */ 84 char i_ino_dir[IOB_INODESZ]; /* inode or disk/tape directory */ 85 86 int i_flgs; /* see F_ below */ 87 int i_ctlr; /* controller board */ 88 int i_unit; /* pseudo device unit */ 89 int i_part; /* disk partition */ 90 char *i_ma; /* memory address of i/o buffer */ 91 int i_cc; /* character count of transfer */ 92 int32_t i_offset; /* seek offset in file */ 93 /* XXX ondisk32 */ 94 int32_t i_bn; /* 1st block # of next read */ 95 int i_fstype; /* file system type */ 96 int i_errno; /* error # return */ 97 unsigned int i_devaddr; /* csr address */ 98 struct device_table *i_dp; /* pointer into device_table */ 99 char *i_bufp; /* i/o buffer for blk devs */ 100 }__attribute__((__packed__)); 101 102 extern struct sa_iob *saiob[]; 103 104 int 105 saiostrategy(devdata, rw, bn, reqcnt, addr, cnt) 106 void *devdata; 107 int rw; 108 daddr_t bn; 109 size_t reqcnt; 110 void *addr; 111 size_t *cnt; /* out: number of bytes transfered */ 112 { 113 struct saio_softc *sc = (struct saio_softc *)devdata; 114 int part = sc->sc_part; 115 struct partition *pp = &sc->sc_label.d_partitions[part]; 116 int s; 117 long offset; 118 struct sa_iob *iob; 119 120 offset = bn * DEV_BSIZE; 121 *cnt = 0; 122 123 /* 124 * Partial-block transfers not handled. 125 */ 126 if (reqcnt & (DEV_BSIZE - 1)) { 127 return (EINVAL); 128 } 129 offset += pp->p_offset * DEV_BSIZE; 130 131 iob = saiob[sc->sc_fd]; 132 iob->i_offset = offset; 133 134 #if notyet 135 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 136 return (EIO); 137 #endif 138 139 while (*cnt < reqcnt) { 140 s = prom_read(sc->sc_fd, iob->i_buf, 512); 141 if (s < 0) { 142 return (EIO); 143 } 144 memcpy(addr, iob->i_buf, s); 145 *cnt += s; 146 (char *)addr += s; 147 } 148 return (0); 149 } 150 151 int 152 saioopen(struct open_file *f, ...) 153 { 154 int ctlr, unit, part; 155 156 struct saio_softc *sc; 157 struct disklabel *lp; 158 int i; 159 char *msg; 160 char buf[DEV_BSIZE]; 161 int cnt; 162 static char device[] = "dksd(0,0,10)"; 163 164 va_list ap; 165 166 va_start(ap, f); 167 168 ctlr = va_arg(ap, int); 169 unit = va_arg(ap, int); 170 part = va_arg(ap, int); 171 172 va_end(ap); 173 174 device[5] = '0' + ctlr; 175 device[7] = '0' + unit; 176 177 i = prom_open(device, 0); 178 if (i < 0) { 179 printf("open failed\n"); 180 return (ENXIO); 181 } 182 183 sc = alloc(sizeof(struct saio_softc)); 184 memset(sc, 0, sizeof(struct saio_softc)); 185 f->f_devdata = (void *)sc; 186 187 sc->sc_fd = i; 188 sc->sc_ctlr = ctlr; 189 sc->sc_unit = unit; 190 sc->sc_part = part; 191 192 /* try to read disk label and partition table information */ 193 lp = &sc->sc_label; 194 lp->d_secsize = DEV_BSIZE; 195 lp->d_secpercyl = 1; 196 lp->d_npartitions = MAXPARTITIONS; 197 lp->d_partitions[part].p_offset = 0; 198 lp->d_partitions[part].p_size = 0x7fffffff; 199 200 i = saiostrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 201 if (i || cnt != DEV_BSIZE) { 202 printf("%s: error reading disk label\n", device); 203 goto bad; 204 } 205 206 msg = getdisklabel(buf, lp); 207 if (msg) { 208 #ifdef LIBSA_NO_DISKLABEL_MSGS 209 printf("%s: no disklabel\n", device); 210 #else 211 printf("getlabel: %s\n", msg); 212 #endif 213 return (0); 214 } 215 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 216 bad: 217 free(sc, sizeof(struct saio_softc)); 218 return (ENXIO); 219 } 220 return (0); 221 } 222 223 #ifndef LIBSA_NO_DEV_CLOSE 224 int 225 saioclose(f) 226 struct open_file *f; 227 { 228 229 prom_close(((struct saio_softc *)f->f_devdata)->sc_fd); 230 free(f->f_devdata, sizeof(struct saio_softc)); 231 f->f_devdata = (void *)0; 232 return (0); 233 } 234 #endif 235
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