1 /* $NetBSD: saio.c,v 1.15 2021/07/24 21:31:34 andvar 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 41 #include <sys/param.h> 42 #include <sys/disklabel.h> 43 44 #include "common.h" 45 #include "saio.h" 46 47 struct saio_softc { 48 int sc_fd; /* PROM file id */ 49 int sc_ctlr; /* controller number */ 50 int sc_unit; /* disk unit number */ 51 int sc_part; /* disk partition number */ 52 struct disklabel sc_label; /* disk label for this disk */ 53 }; 54 55 struct io_arg { 56 int retval; 57 unsigned long sectst; 58 unsigned long memaddr; 59 unsigned long datasz; 60 }; 61 62 #define IOB_BUFSZ 512 63 #define IOB_INODESZ 316 64 65 struct device_table { 66 char *dt_string; /* device name */ 67 int (*dt_init) (int); /* device init routine */ 68 int (*dt_open)(int); /* device open routine */ 69 int (*dt_strategy)(int); /* device strategy routine, returns cnt */ 70 int (*dt_close)(int); /* device close routine */ 71 int (*dt_ioctl)(int); /* device ioctl routine */ 72 int dt_type; /* device "type" */ 73 int dt_fs; /* file system type */ 74 char *dt_desc; /* device description */ 75 }; 76 77 struct sa_iob { 78 char i_buf[IOB_BUFSZ]; /* file system or tape header */ 79 char i_ino_dir[IOB_INODESZ]; /* inode or disk/tape directory */ 80 81 int i_flgs; /* see F_ below */ 82 int i_ctlr; /* controller board */ 83 int i_unit; /* pseudo device unit */ 84 int i_part; /* disk partition */ 85 char *i_ma; /* memory address of i/o buffer */ 86 int i_cc; /* character count of transfer */ 87 int32_t i_offset; /* seek offset in file */ 88 /* XXX ondisk32 */ 89 int32_t i_bn; /* 1st block # of next read */ 90 int i_fstype; /* file system type */ 91 int i_errno; /* error # return */ 92 unsigned int i_devaddr; /* csr address */ 93 struct device_table *i_dp; /* pointer into device_table */ 94 char *i_bufp; /* i/o buffer for blk devs */ 95 }__attribute__((__packed__)); 96 97 extern struct sa_iob *saiob[]; 98 99 int 100 saiostrategy(void *devdata, int rw, daddr_t bn, size_t reqcnt, void *addr, size_t *cnt) 101 /* cnt: out: number of bytes transferred */ 102 { 103 struct saio_softc *sc = (struct saio_softc *)devdata; 104 int part = sc->sc_part; 105 struct partition *pp = &sc->sc_label.d_partitions[part]; 106 int s; 107 long offset; 108 struct sa_iob *iob; 109 char *adr; 110 111 offset = bn * DEV_BSIZE; 112 *cnt = 0; 113 114 /* 115 * Partial-block transfers not handled. 116 */ 117 if (reqcnt & (DEV_BSIZE - 1)) { 118 return (EINVAL); 119 } 120 offset += pp->p_offset * DEV_BSIZE; 121 122 iob = saiob[sc->sc_fd]; 123 iob->i_offset = offset; 124 125 #if notyet 126 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 127 return (EIO); 128 #endif 129 130 adr = (char *)addr; 131 while (*cnt < reqcnt) { 132 s = prom_read(sc->sc_fd, iob->i_buf, 512); 133 if (s < 0) { 134 return (EIO); 135 } 136 memcpy(adr, iob->i_buf, s); 137 *cnt += s; 138 adr += s; 139 } 140 return (0); 141 } 142 143 int 144 saioopen(struct open_file *f, ...) 145 { 146 int ctlr, unit, part; 147 148 struct saio_softc *sc; 149 struct disklabel *lp; 150 int i; 151 char *msg; 152 char buf[DEV_BSIZE]; 153 size_t cnt; 154 static char device[] = "dksd(0,0,10)"; 155 156 va_list ap; 157 158 va_start(ap, f); 159 160 ctlr = va_arg(ap, int); 161 unit = va_arg(ap, int); 162 part = va_arg(ap, int); 163 164 va_end(ap); 165 166 device[5] = '0' + ctlr; 167 device[7] = '0' + unit; 168 169 i = prom_open(device, 0); 170 if (i < 0) { 171 printf("open failed\n"); 172 return (ENXIO); 173 } 174 175 sc = alloc(sizeof(struct saio_softc)); 176 memset(sc, 0, sizeof(struct saio_softc)); 177 f->f_devdata = (void *)sc; 178 179 sc->sc_fd = i; 180 sc->sc_ctlr = ctlr; 181 sc->sc_unit = unit; 182 sc->sc_part = part; 183 184 /* try to read disk label and partition table information */ 185 lp = &sc->sc_label; 186 lp->d_secsize = DEV_BSIZE; 187 lp->d_secpercyl = 1; 188 lp->d_npartitions = MAXPARTITIONS; 189 lp->d_partitions[part].p_offset = 0; 190 lp->d_partitions[part].p_size = 0x7fffffff; 191 192 i = saiostrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 193 if (i || cnt != DEV_BSIZE) { 194 printf("%s: error reading disk label\n", device); 195 goto bad; 196 } 197 198 msg = getdisklabel(buf, lp); 199 if (msg) { 200 #ifdef LIBSA_NO_DISKLABEL_MSGS 201 printf("%s: no disklabel\n", device); 202 #else 203 printf("getlabel: %s\n", msg); 204 #endif 205 return (0); 206 } 207 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 208 bad: 209 dealloc(sc, sizeof(struct saio_softc)); 210 return (ENXIO); 211 } 212 return (0); 213 } 214 215 #ifndef LIBSA_NO_DEV_CLOSE 216 int 217 saioclose(struct open_file *f) 218 { 219 220 prom_close(((struct saio_softc *)f->f_devdata)->sc_fd); 221 dealloc(f->f_devdata, sizeof(struct saio_softc)); 222 f->f_devdata = (void *)0; 223 return (0); 224 } 225 #endif 226
Indexes created Tue Sep 23 21:09:50 GMT 2025