saio.c revision 1.1
1 /* $NetBSD: saio.c,v 1.1 2000/09/18 11:40:48 wdk 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 <machine/prom.h> 43 #include <machine/stdarg.h> 44 45 #include <sys/param.h> 46 #include <sys/disklabel.h> 47 48 #include "common.h" 49 #include "saio.h" 50 51 struct saio_softc { 52 int sc_fd; /* PROM file id */ 53 int sc_ctlr; /* controller number */ 54 int sc_unit; /* disk unit number */ 55 int sc_part; /* disk partition number */ 56 struct disklabel sc_label; /* disk label for this disk */ 57 }; 58 59 struct io_arg { 60 int retval; 61 unsigned long sectst; 62 unsigned long memaddr; 63 unsigned long datasz; 64 }; 65 66 #define IOB_BUFSZ 512 67 #define IOB_INODESZ 312 68 69 struct device_table { 70 char *dt_string; /* device name */ 71 int (*dt_init) (int); /* device init routine */ 72 int (*dt_open) __P((int)); /* device open routine */ 73 int (*dt_strategy) __P((int)); /* device strategy routine, returns cnt */ 74 int (*dt_close) __P((int)); /* device close routine */ 75 int (*dt_ioctl) __P((int)); /* device ioctl routine */ 76 int dt_type; /* device "type" */ 77 int dt_fs; /* file system type */ 78 char *dt_desc; /* device description */ 79 }; 80 81 struct sa_iob { 82 char i_buf[IOB_BUFSZ]; /* file system or tape header */ 83 char i_ino_dir[IOB_INODESZ]; /* inode or disk/tape directory */ 84 85 int i_flgs; /* see F_ below */ 86 int i_ctlr; /* controller board */ 87 int i_unit; /* pseudo device unit */ 88 int i_part; /* disk partition */ 89 char *i_ma; /* memory address of i/o buffer */ 90 int i_cc; /* character count of transfer */ 91 off_t i_offset; /* seek offset in file */ 92 daddr_t i_bn; /* 1st block # of next read */ 93 int i_fstype; /* file system type */ 94 int i_errno; /* error # return */ 95 unsigned int i_devaddr; /* csr address */ 96 struct device_table *i_dp; /* pointer into device_table */ 97 char *i_bufp; /* i/o buffer for blk devs */ 98 }__attribute__((__packed__)); 99 100 extern struct sa_iob *saiob[]; 101 102 int 103 saiostrategy(devdata, rw, bn, reqcnt, addr, cnt) 104 void *devdata; 105 int rw; 106 daddr_t bn; 107 size_t reqcnt; 108 void *addr; 109 size_t *cnt; /* out: number of bytes transfered */ 110 { 111 struct saio_softc *sc = (struct saio_softc *)devdata; 112 int part = sc->sc_part; 113 struct partition *pp = &sc->sc_label.d_partitions[part]; 114 int s; 115 long offset; 116 struct sa_iob *iob; 117 118 offset = bn * DEV_BSIZE; 119 *cnt = 0; 120 121 /* 122 * Partial-block transfers not handled. 123 */ 124 if (reqcnt & (DEV_BSIZE - 1)) { 125 return (EINVAL); 126 } 127 offset += pp->p_offset * DEV_BSIZE; 128 129 iob = saiob[sc->sc_fd]; 130 iob->i_offset = offset; 131 132 #if notyet 133 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 134 return (EIO); 135 #endif 136 137 while (*cnt < reqcnt) { 138 s = prom_read(sc->sc_fd, iob->i_buf, 512); 139 if (s < 0) { 140 return (EIO); 141 } 142 memcpy(addr, iob->i_buf, s); 143 *cnt += s; 144 (char *)addr += s; 145 } 146 147 return (0); 148 } 149 150 int 151 saioopen(struct open_file *f, ...) 152 { 153 int ctlr, unit, part; 154 155 struct saio_softc *sc; 156 struct disklabel *lp; 157 int i; 158 char *msg; 159 char buf[DEV_BSIZE]; 160 int cnt; 161 static char device[] = "dksd(0,0,10)"; 162 163 va_list ap; 164 165 va_start(ap, f); 166 167 ctlr = va_arg(ap, int); 168 unit = va_arg(ap, int); 169 part = va_arg(ap, int); 170 if (unit >= 8 || part >= 8) 171 return (ENXIO); 172 device[7] = '0' + unit; 173 174 i = MIPS_PROM(open)(device, 0); 175 if (i < 0) { 176 printf("open failed\n"); 177 return (ENXIO); 178 } 179 180 sc = alloc(sizeof(struct saio_softc)); 181 memset(sc, 0, sizeof(struct saio_softc)); 182 f->f_devdata = (void *)sc; 183 184 sc->sc_fd = i; 185 sc->sc_ctlr = ctlr; 186 sc->sc_unit = unit; 187 sc->sc_part = part; 188 189 /* try to read disk label and partition table information */ 190 lp = &sc->sc_label; 191 lp->d_secsize = DEV_BSIZE; 192 lp->d_secpercyl = 1; 193 lp->d_npartitions = MAXPARTITIONS; 194 lp->d_partitions[part].p_offset = 0; 195 lp->d_partitions[part].p_size = 0x7fffffff; 196 197 i = saiostrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 198 if (i || cnt != DEV_BSIZE) { 199 printf("%s: error reading disk label\n", device); 200 goto bad; 201 } 202 203 msg = getdisklabel(buf, lp); 204 if (msg) { 205 printf("getlabel: %s\n", msg); 206 return (0); 207 } 208 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 209 bad: 210 free(sc, sizeof(struct saio_softc)); 211 return (ENXIO); 212 } 213 return (0); 214 } 215 216 #ifndef LIBSA_NO_DEV_CLOSE 217 int 218 saioclose(f) 219 struct open_file *f; 220 { 221 222 prom_close(((struct saio_softc *)f->f_devdata)->sc_fd); 223 free(f->f_devdata, sizeof(struct saio_softc)); 224 f->f_devdata = (void *)0; 225 return (0); 226 } 227 #endif 228
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