ofdev.c revision 1.13
1 /* $NetBSD: ofdev.c,v 1.13 2007/09/14 09:19:39 martin Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 /* 34 * Device I/O routines using Open Firmware 35 */ 36 #include <sys/param.h> 37 #include <sys/disklabel.h> 38 #ifdef NETBOOT 39 #include <netinet/in.h> 40 #endif 41 42 #include <lib/libsa/stand.h> 43 #include <lib/libsa/ufs.h> 44 #include <lib/libsa/cd9660.h> 45 #ifdef NETBOOT 46 #include <lib/libsa/nfs.h> 47 #endif 48 #include <lib/libkern/libkern.h> 49 50 #include <dev/sun/disklabel.h> 51 #include <dev/raidframe/raidframevar.h> 52 53 #include <machine/promlib.h> 54 55 #include "ofdev.h" 56 57 extern char bootdev[]; 58 59 /* 60 * This is ugly. A path on a sparc machine is something like this: 61 * 62 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 63 * 64 */ 65 66 static char * 67 filename(char *str, char *ppart) 68 { 69 char *cp, *lp; 70 char savec; 71 int dhandle; 72 char devtype[16]; 73 74 lp = str; 75 devtype[0] = 0; 76 *ppart = 0; 77 for (cp = str; *cp; lp = cp) { 78 /* For each component of the path name... */ 79 while (*++cp && *cp != '/'); 80 savec = *cp; 81 *cp = 0; 82 /* ...look whether there is a device with this name */ 83 dhandle = prom_finddevice(str); 84 #ifdef NOTDEF_DEBUG 85 printf("filename: prom_finddevice(%s) returned %x\n", 86 str, dhandle); 87 #endif 88 *cp = savec; 89 if (dhandle == -1) { 90 /* 91 * if not, lp is the delimiter between device and 92 * path. if the last component was a block device. 93 */ 94 if (!strcmp(devtype, "block")) { 95 /* search for arguments */ 96 #ifdef NOTDEF_DEBUG 97 printf("filename: hunting for arguments " 98 "in %s\n", str); 99 #endif 100 for (cp = lp; ; ) { 101 cp--; 102 if (cp < str || 103 cp[0] == '/' || 104 (cp[0] == ' ' && (cp+1) != lp && 105 cp[1] == '-')) 106 break; 107 } 108 if (cp >= str && *cp == '-') 109 *cp = 0; /* found arguments, make firmware ignore them */ 110 for (cp = lp; *--cp && *cp != ',' && *cp != ':';); 111 if (*++cp >= 'a' && *cp <= 'a' + MAXPARTITIONS) { 112 *ppart = *cp; 113 *--cp = '\0'; 114 } 115 } 116 #ifdef NOTDEF_DEBUG 117 printf("filename: found %s\n",lp); 118 #endif 119 return lp; 120 } else if (_prom_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0) 121 devtype[0] = 0; 122 } 123 #ifdef NOTDEF_DEBUG 124 printf("filename: not found\n",lp); 125 #endif 126 return 0; 127 } 128 129 static int 130 strategy(devdata, rw, blk, size, buf, rsize) 131 void *devdata; 132 int rw; 133 daddr_t blk; 134 size_t size; 135 void *buf; 136 size_t *rsize; 137 { 138 struct of_dev *dev = devdata; 139 u_quad_t pos; 140 int n; 141 142 if (rw != F_READ) 143 return EPERM; 144 if (dev->type != OFDEV_DISK) 145 panic("strategy"); 146 147 #ifdef NON_DEBUG 148 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 149 (long)blk, (long)dev->partoff, (long)dev->bsize); 150 printf("strategy: seek position should be: %lx\n", 151 (long)((blk + dev->partoff) * dev->bsize)); 152 #endif 153 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 154 155 for (;;) { 156 #ifdef NON_DEBUG 157 printf("strategy: seeking to %lx\n", (long)pos); 158 #endif 159 if (prom_seek(dev->handle, pos) < 0) 160 break; 161 #ifdef NON_DEBUG 162 printf("strategy: reading %lx at %p\n", (long)size, buf); 163 #endif 164 n = prom_read(dev->handle, buf, size); 165 if (n == -2) 166 continue; 167 if (n < 0) 168 break; 169 *rsize = n; 170 return 0; 171 } 172 return EIO; 173 } 174 175 static int 176 devclose(struct open_file *of) 177 { 178 struct of_dev *op = of->f_devdata; 179 180 #ifdef NETBOOT 181 if (op->type == OFDEV_NET) 182 net_close(op); 183 #endif 184 prom_close(op->handle); 185 op->handle = -1; 186 } 187 188 static struct devsw ofdevsw[1] = { 189 "OpenFirmware", 190 strategy, 191 (int (*)(struct open_file *, ...))nodev, 192 devclose, 193 noioctl 194 }; 195 int ndevs = sizeof ofdevsw / sizeof ofdevsw[0]; 196 197 #ifdef SPARC_BOOT_UFS 198 static struct fs_ops file_system_ufs = FS_OPS(ufs); 199 #endif 200 #ifdef SPARC_BOOT_HSFS 201 static struct fs_ops file_system_cd9660 = FS_OPS(cd9660); 202 #endif 203 #ifdef NETBOOT 204 static struct fs_ops file_system_nfs = FS_OPS(nfs); 205 #endif 206 207 struct fs_ops file_system[3]; 208 int nfsys; 209 210 static struct of_dev ofdev = { 211 -1, 212 }; 213 214 char opened_name[256]; 215 int floppyboot; 216 217 static u_long 218 get_long(const void *p) 219 { 220 const unsigned char *cp = p; 221 222 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 223 } 224 /************************************************************************ 225 * 226 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 227 * and then substantially rewritten by Gordon W. Ross 228 * 229 ************************************************************************/ 230 231 /* What partition types to assume for Sun disklabels: */ 232 static u_char 233 sun_fstypes[8] = { 234 FS_BSDFFS, /* a */ 235 FS_SWAP, /* b */ 236 FS_OTHER, /* c - whole disk */ 237 FS_BSDFFS, /* d */ 238 FS_BSDFFS, /* e */ 239 FS_BSDFFS, /* f */ 240 FS_BSDFFS, /* g */ 241 FS_BSDFFS, /* h */ 242 }; 243 244 /* 245 * Given a SunOS disk label, set lp to a BSD disk label. 246 * Returns NULL on success, else an error string. 247 * 248 * The BSD label is cleared out before this is called. 249 */ 250 static char * 251 disklabel_sun_to_bsd(char *cp, struct disklabel *lp) 252 { 253 struct sun_disklabel *sl; 254 struct partition *npp; 255 struct sun_dkpart *spp; 256 int i, secpercyl; 257 u_short cksum, *sp1, *sp2; 258 259 sl = (struct sun_disklabel *)cp; 260 261 /* Verify the XOR check. */ 262 sp1 = (u_short *)sl; 263 sp2 = (u_short *)(sl + 1); 264 cksum = 0; 265 while (sp1 < sp2) 266 cksum ^= *sp1++; 267 if (cksum != 0) 268 return("SunOS disk label, bad checksum"); 269 270 /* Format conversion. */ 271 lp->d_magic = DISKMAGIC; 272 lp->d_magic2 = DISKMAGIC; 273 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 274 275 lp->d_secsize = 512; 276 lp->d_nsectors = sl->sl_nsectors; 277 lp->d_ntracks = sl->sl_ntracks; 278 lp->d_ncylinders = sl->sl_ncylinders; 279 280 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 281 lp->d_secpercyl = secpercyl; 282 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 283 284 lp->d_sparespercyl = sl->sl_sparespercyl; 285 lp->d_acylinders = sl->sl_acylinders; 286 lp->d_rpm = sl->sl_rpm; 287 lp->d_interleave = sl->sl_interleave; 288 289 lp->d_npartitions = 8; 290 /* These are as defined in <ufs/ffs/fs.h> */ 291 lp->d_bbsize = 8192; /* XXX */ 292 lp->d_sbsize = 8192; /* XXX */ 293 294 for (i = 0; i < 8; i++) { 295 spp = &sl->sl_part[i]; 296 npp = &lp->d_partitions[i]; 297 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 298 npp->p_size = spp->sdkp_nsectors; 299 #ifdef NOTDEF_DEBUG 300 printf("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size); 301 #endif 302 if (npp->p_size == 0) { 303 npp->p_fstype = FS_UNUSED; 304 } else { 305 npp->p_fstype = sun_fstypes[i]; 306 if (npp->p_fstype == FS_BSDFFS) { 307 /* 308 * The sun label does not store the FFS fields, 309 * so just set them with default values here. 310 */ 311 npp->p_fsize = 1024; 312 npp->p_frag = 8; 313 npp->p_cpg = 16; 314 } 315 } 316 } 317 318 lp->d_checksum = 0; 319 lp->d_checksum = dkcksum(lp); 320 #ifdef NOTDEF_DEBUG 321 printf("disklabel_sun_to_bsd: success!\n"); 322 #endif 323 return (NULL); 324 } 325 326 /* 327 * Find a valid disklabel. 328 */ 329 static char * 330 search_label(struct of_dev *devp, u_long off, char *buf, 331 struct disklabel *lp, u_long off0) 332 { 333 size_t read; 334 struct mbr_partition *p; 335 int i; 336 u_long poff; 337 static int recursion; 338 339 struct disklabel *dlp; 340 struct sun_disklabel *slp; 341 int error; 342 343 /* minimal requirements for archtypal disk label */ 344 if (lp->d_secperunit == 0) 345 lp->d_secperunit = 0x1fffffff; 346 lp->d_npartitions = 1; 347 if (lp->d_partitions[0].p_size == 0) 348 lp->d_partitions[0].p_size = 0x1fffffff; 349 lp->d_partitions[0].p_offset = 0; 350 351 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 352 || read != DEV_BSIZE) 353 return ("Cannot read label"); 354 /* Check for a NetBSD disk label. */ 355 dlp = (struct disklabel *) (buf + LABELOFFSET); 356 if (dlp->d_magic == DISKMAGIC) { 357 if (dkcksum(dlp)) 358 return ("NetBSD disk label corrupted"); 359 *lp = *dlp; 360 #ifdef NOTDEF_DEBUG 361 printf("search_label: found NetBSD label\n"); 362 #endif 363 return (NULL); 364 } 365 366 /* Check for a Sun disk label (for PROM compatibility). */ 367 slp = (struct sun_disklabel *) buf; 368 if (slp->sl_magic == SUN_DKMAGIC) 369 return (disklabel_sun_to_bsd(buf, lp)); 370 371 372 bzero(buf, sizeof(buf)); 373 return ("no disk label"); 374 } 375 376 int 377 devopen(struct open_file *of, const char *name, char **file) 378 { 379 char *cp; 380 char partition; 381 char fname[256]; 382 union { 383 char buf[DEV_BSIZE]; 384 struct disklabel label; 385 } b; 386 struct disklabel label; 387 int handle, part; 388 size_t read; 389 char *errmsg = NULL; 390 int error = 0; 391 392 if (ofdev.handle != -1) 393 panic("devopen"); 394 if (of->f_flags != F_READ) 395 return EPERM; 396 #ifdef NOTDEF_DEBUG 397 printf("devopen: you want %s\n", name); 398 #endif 399 strcpy(fname, name); 400 cp = filename(fname, &partition); 401 if (cp) { 402 strcpy(b.buf, cp); 403 *cp = 0; 404 } 405 if (!cp || !b.buf[0]) 406 strcpy(b.buf, DEFAULT_KERNEL); 407 if (!*fname) 408 strcpy(fname, bootdev); 409 strcpy(opened_name, fname); 410 if (partition) { 411 cp = opened_name + strlen(opened_name); 412 *cp++ = ':'; 413 *cp++ = partition; 414 *cp = 0; 415 } 416 *file = opened_name + strlen(opened_name); 417 if (b.buf[0] != '/') 418 strcat(opened_name, "/"); 419 strcat(opened_name, b.buf); 420 #ifdef NOTDEF_DEBUG 421 printf("devopen: trying %s\n", fname); 422 #endif 423 if ((handle = prom_finddevice(fname)) == -1) 424 return ENOENT; 425 #ifdef NOTDEF_DEBUG 426 printf("devopen: found %s\n", fname); 427 #endif 428 if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0) 429 return ENXIO; 430 #ifdef NOTDEF_DEBUG 431 printf("devopen: %s is called %s\n", fname, b.buf); 432 #endif 433 floppyboot = !strcmp(b.buf, "floppy"); 434 if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0) 435 return ENXIO; 436 #ifdef NOTDEF_DEBUG 437 printf("devopen: %s is a %s device\n", fname, b.buf); 438 #endif 439 #ifdef NOTDEF_DEBUG 440 printf("devopen: opening %s\n", fname); 441 #endif 442 if ((handle = prom_open(fname)) == -1) { 443 #ifdef NOTDEF_DEBUG 444 printf("devopen: open of %s failed\n", fname); 445 #endif 446 return ENXIO; 447 } 448 #ifdef NOTDEF_DEBUG 449 printf("devopen: %s is now open\n", fname); 450 #endif 451 bzero(&ofdev, sizeof ofdev); 452 ofdev.handle = handle; 453 if (!strcmp(b.buf, "block")) { 454 ofdev.type = OFDEV_DISK; 455 ofdev.bsize = DEV_BSIZE; 456 /* First try to find a disklabel without MBR partitions */ 457 #ifdef NOTDEF_DEBUG 458 printf("devopen: trying to read disklabel\n"); 459 #endif 460 if (strategy(&ofdev, F_READ, 461 LABELSECTOR, DEV_BSIZE, b.buf, &read) != 0 462 || read != DEV_BSIZE 463 || (errmsg = getdisklabel(b.buf, &label))) { 464 if (errmsg) printf("devopen: getdisklabel returned %s\n", errmsg); 465 /* Else try MBR partitions */ 466 errmsg = search_label(&ofdev, 0, b.buf, &label, 0); 467 if (errmsg) { 468 printf("devopen: search_label returned %s\n", errmsg); 469 error = ERDLAB; 470 } 471 if (error && error != ERDLAB) 472 goto bad; 473 } 474 475 if (error == ERDLAB) { 476 if (partition) 477 /* User specified a parititon, but there is none */ 478 goto bad; 479 /* No, label, just use complete disk */ 480 ofdev.partoff = 0; 481 } else { 482 part = partition ? partition - 'a' : 0; 483 ofdev.partoff = label.d_partitions[part].p_offset; 484 #ifdef NOTDEF_DEBUG 485 printf("devopen: setting partition %d offset %x\n", 486 part, ofdev.partoff); 487 #endif 488 if (label.d_partitions[part].p_fstype == FS_RAID) { 489 ofdev.partoff += RF_PROTECTED_SECTORS; 490 #ifdef NOTDEF_DEBUG 491 printf("devopen: found RAID partition, " 492 "adjusting offset to %x\n", ofdev.partoff); 493 #endif 494 } 495 } 496 497 of->f_dev = ofdevsw; 498 of->f_devdata = &ofdev; 499 #ifdef SPARC_BOOT_UFS 500 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 501 #endif 502 #ifdef SPARC_BOOT_HSFS 503 bcopy(&file_system_cd9660, &file_system[nfsys++], 504 sizeof file_system[0]); 505 #endif 506 #ifdef NOTDEF_DEBUG 507 printf("devopen: return 0\n"); 508 #endif 509 return 0; 510 } 511 #ifdef NETBOOT 512 if (!strcmp(b.buf, "network")) { 513 ofdev.type = OFDEV_NET; 514 of->f_dev = ofdevsw; 515 of->f_devdata = &ofdev; 516 bcopy(&file_system_nfs, file_system, sizeof file_system[0]); 517 nfsys = 1; 518 if (error = net_open(&ofdev)) 519 goto bad; 520 return 0; 521 } 522 #endif 523 error = EFTYPE; 524 bad: 525 #ifdef NOTDEF_DEBUG 526 printf("devopen: error %d, cannot open device\n", error); 527 #endif 528 prom_close(handle); 529 ofdev.handle = -1; 530 return error; 531 } 532
Indexes created Tue Sep 23 23:09:58 GMT 2025