1 /* $NetBSD: ofdev.c,v 1.3 2002/10/20 20:55:38 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 "ofdev.h" 52 53 extern char bootdev[]; 54 55 #define RF_PROTECTED_SECTORS 64 /* XXX */ 56 57 /* 58 * This is ugly. A path on a sparc machine is something like this: 59 * 60 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 61 * 62 */ 63 64 static char * 65 filename(str, ppart) 66 char *str; 67 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 = OF_finddevice(str); 84 #ifdef NOTDEF_DEBUG 85 printf("filename: OF_finddevice(%s) sez %x\n", 86 str, dhandle); 87 #endif 88 *cp = savec; 89 if (dhandle == -1) { 90 /* if not, lp is the delimiter between device and path */ 91 /* if the last component was a block device... */ 92 if (!strcmp(devtype, "block")) { 93 /* search for arguments */ 94 #ifdef NOTDEF_DEBUG 95 printf("filename: hunting for arguments in %s\n", str); 96 #endif 97 for (cp = lp; ; ) { 98 cp--; 99 if (cp < str) break; 100 if (cp[0] == '/') break; 101 if (cp[0] == ' ' && (cp+1) != lp && 102 cp[1] == '-') 103 break; 104 } 105 if (cp >= str && *cp == '-') { 106 /* found arguments, make firmware ignore them */ 107 *cp = 0; 108 for (cp = lp; *--cp && *cp != ',';); 109 if (*++cp >= 'a' && *cp <= 'a' + MAXPARTITIONS) 110 *ppart = *cp; 111 } 112 } 113 #ifdef NOTDEF_DEBUG 114 printf("filename: found %s\n",lp); 115 #endif 116 return lp; 117 } else if (OF_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0) 118 devtype[0] = 0; 119 } 120 #ifdef NOTDEF_DEBUG 121 printf("filename: not found\n",lp); 122 #endif 123 return 0; 124 } 125 126 static int 127 strategy(devdata, rw, blk, size, buf, rsize) 128 void *devdata; 129 int rw; 130 daddr_t blk; 131 size_t size; 132 void *buf; 133 size_t *rsize; 134 { 135 struct of_dev *dev = devdata; 136 u_quad_t pos; 137 int n; 138 139 if (rw != F_READ) 140 return EPERM; 141 if (dev->type != OFDEV_DISK) 142 panic("strategy"); 143 144 #ifdef NON_DEBUG 145 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 146 (long)blk, (long)dev->partoff, (long)dev->bsize); 147 printf("strategy: seek position should be: %lx\n", 148 (long)((blk + dev->partoff) * dev->bsize)); 149 #endif 150 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 151 152 for (;;) { 153 #ifdef NON_DEBUG 154 printf("strategy: seeking to %lx\n", (long)pos); 155 #endif 156 if (OF_seek(dev->handle, pos) < 0) 157 break; 158 #ifdef NON_DEBUG 159 printf("strategy: reading %lx at %p\n", (long)size, buf); 160 #endif 161 n = OF_read(dev->handle, buf, size); 162 if (n == -2) 163 continue; 164 if (n < 0) 165 break; 166 *rsize = n; 167 return 0; 168 } 169 return EIO; 170 } 171 172 static int 173 devclose(of) 174 struct open_file *of; 175 { 176 struct of_dev *op = of->f_devdata; 177 178 #ifdef NETBOOT 179 if (op->type == OFDEV_NET) 180 net_close(op); 181 #endif 182 OF_close(op->handle); 183 op->handle = -1; 184 } 185 186 static struct devsw devsw[1] = { 187 "OpenFirmware", 188 strategy, 189 (int (*)__P((struct open_file *, ...)))nodev, 190 devclose, 191 noioctl 192 }; 193 int ndevs = sizeof devsw / sizeof devsw[0]; 194 195 #ifdef SPARC_BOOT_UFS 196 static struct fs_ops file_system_ufs = { 197 ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat 198 }; 199 #endif 200 #ifdef SPARC_BOOT_HSFS 201 static struct fs_ops file_system_cd9660 = { 202 cd9660_open, cd9660_close, cd9660_read, cd9660_write, cd9660_seek, 203 cd9660_stat 204 }; 205 #endif 206 #ifdef NETBOOT 207 static struct fs_ops file_system_nfs = { 208 nfs_open, nfs_close, nfs_read, nfs_write, nfs_seek, nfs_stat 209 }; 210 #endif 211 212 struct fs_ops file_system[3]; 213 int nfsys; 214 215 static struct of_dev ofdev = { 216 -1, 217 }; 218 219 char opened_name[256]; 220 int floppyboot; 221 222 static u_long 223 get_long(p) 224 const void *p; 225 { 226 const unsigned char *cp = p; 227 228 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 229 } 230 /************************************************************************ 231 * 232 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 233 * and then substantially rewritten by Gordon W. Ross 234 * 235 ************************************************************************/ 236 237 /* What partition types to assume for Sun disklabels: */ 238 static u_char 239 sun_fstypes[8] = { 240 FS_BSDFFS, /* a */ 241 FS_SWAP, /* b */ 242 FS_OTHER, /* c - whole disk */ 243 FS_BSDFFS, /* d */ 244 FS_BSDFFS, /* e */ 245 FS_BSDFFS, /* f */ 246 FS_BSDFFS, /* g */ 247 FS_BSDFFS, /* h */ 248 }; 249 250 /* 251 * Given a SunOS disk label, set lp to a BSD disk label. 252 * Returns NULL on success, else an error string. 253 * 254 * The BSD label is cleared out before this is called. 255 */ 256 static char * 257 disklabel_sun_to_bsd(cp, lp) 258 char *cp; 259 struct disklabel *lp; 260 { 261 struct sun_disklabel *sl; 262 struct partition *npp; 263 struct sun_dkpart *spp; 264 int i, secpercyl; 265 u_short cksum, *sp1, *sp2; 266 267 sl = (struct sun_disklabel *)cp; 268 269 /* Verify the XOR check. */ 270 sp1 = (u_short *)sl; 271 sp2 = (u_short *)(sl + 1); 272 cksum = 0; 273 while (sp1 < sp2) 274 cksum ^= *sp1++; 275 if (cksum != 0) 276 return("SunOS disk label, bad checksum"); 277 278 /* Format conversion. */ 279 lp->d_magic = DISKMAGIC; 280 lp->d_magic2 = DISKMAGIC; 281 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 282 283 lp->d_secsize = 512; 284 lp->d_nsectors = sl->sl_nsectors; 285 lp->d_ntracks = sl->sl_ntracks; 286 lp->d_ncylinders = sl->sl_ncylinders; 287 288 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 289 lp->d_secpercyl = secpercyl; 290 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 291 292 lp->d_sparespercyl = sl->sl_sparespercyl; 293 lp->d_acylinders = sl->sl_acylinders; 294 lp->d_rpm = sl->sl_rpm; 295 lp->d_interleave = sl->sl_interleave; 296 297 lp->d_npartitions = 8; 298 /* These are as defined in <ufs/ffs/fs.h> */ 299 lp->d_bbsize = 8192; /* XXX */ 300 lp->d_sbsize = 8192; /* XXX */ 301 302 for (i = 0; i < 8; i++) { 303 spp = &sl->sl_part[i]; 304 npp = &lp->d_partitions[i]; 305 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 306 npp->p_size = spp->sdkp_nsectors; 307 #ifdef NOTDEF_DEBUG 308 printf("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size); 309 #endif 310 if (npp->p_size == 0) { 311 npp->p_fstype = FS_UNUSED; 312 } else { 313 npp->p_fstype = sun_fstypes[i]; 314 if (npp->p_fstype == FS_BSDFFS) { 315 /* 316 * The sun label does not store the FFS fields, 317 * so just set them with default values here. 318 */ 319 npp->p_fsize = 1024; 320 npp->p_frag = 8; 321 npp->p_cpg = 16; 322 } 323 } 324 } 325 326 lp->d_checksum = 0; 327 lp->d_checksum = dkcksum(lp); 328 #ifdef NOTDEF_DEBUG 329 printf("disklabel_sun_to_bsd: success!\n"); 330 #endif 331 return (NULL); 332 } 333 334 /* 335 * Find a valid disklabel. 336 */ 337 static char * 338 search_label(devp, off, buf, lp, off0) 339 struct of_dev *devp; 340 u_long off; 341 char *buf; 342 struct disklabel *lp; 343 u_long off0; 344 { 345 size_t read; 346 struct mbr_partition *p; 347 int i; 348 u_long poff; 349 static int recursion; 350 351 struct disklabel *dlp; 352 struct sun_disklabel *slp; 353 int error; 354 355 /* minimal requirements for archtypal disk label */ 356 if (lp->d_secperunit == 0) 357 lp->d_secperunit = 0x1fffffff; 358 lp->d_npartitions = 1; 359 if (lp->d_partitions[0].p_size == 0) 360 lp->d_partitions[0].p_size = 0x1fffffff; 361 lp->d_partitions[0].p_offset = 0; 362 363 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 364 || read != DEV_BSIZE) 365 return ("Cannot read label"); 366 /* Check for a NetBSD disk label. */ 367 dlp = (struct disklabel *) (buf + LABELOFFSET); 368 if (dlp->d_magic == DISKMAGIC) { 369 if (dkcksum(dlp)) 370 return ("NetBSD disk label corrupted"); 371 *lp = *dlp; 372 #ifdef NOTDEF_DEBUG 373 printf("search_label: found NetBSD label\n"); 374 #endif 375 return (NULL); 376 } 377 378 /* Check for a Sun disk label (for PROM compatibility). */ 379 slp = (struct sun_disklabel *) buf; 380 if (slp->sl_magic == SUN_DKMAGIC) 381 return (disklabel_sun_to_bsd(buf, lp)); 382 383 384 bzero(buf, sizeof(buf)); 385 return ("no disk label"); 386 } 387 388 int 389 devopen(of, name, file) 390 struct open_file *of; 391 const char *name; 392 char **file; 393 { 394 char *cp; 395 char partition; 396 char fname[256]; 397 char buf[DEV_BSIZE]; 398 struct disklabel label; 399 int handle, part; 400 size_t read; 401 char *errmsg = NULL; 402 int error = 0; 403 404 if (ofdev.handle != -1) 405 panic("devopen"); 406 if (of->f_flags != F_READ) 407 return EPERM; 408 #ifdef NOTDEF_DEBUG 409 printf("devopen: you want %s\n", name); 410 #endif 411 strcpy(fname, name); 412 cp = filename(fname, &partition); 413 if (cp) { 414 strcpy(buf, cp); 415 *cp = 0; 416 } 417 if (!cp || !*buf) 418 strcpy(buf, DEFAULT_KERNEL); 419 if (!*fname) 420 strcpy(fname, bootdev); 421 strcpy(opened_name, fname); 422 if (partition) { 423 cp = opened_name + strlen(opened_name); 424 *cp++ = ':'; 425 *cp++ = partition; 426 *cp = 0; 427 } 428 if (*buf != '/') 429 strcat(opened_name, "/"); 430 strcat(opened_name, buf); 431 *file = opened_name + strlen(fname) + 1; 432 #ifdef NOTDEF_DEBUG 433 printf("devopen: trying %s\n", fname); 434 #endif 435 if ((handle = OF_finddevice(fname)) == -1) 436 return ENOENT; 437 #ifdef NOTDEF_DEBUG 438 printf("devopen: found %s\n", fname); 439 #endif 440 if (OF_getprop(handle, "name", buf, sizeof buf) < 0) 441 return ENXIO; 442 #ifdef NOTDEF_DEBUG 443 printf("devopen: %s is called %s\n", fname, buf); 444 #endif 445 floppyboot = !strcmp(buf, "floppy"); 446 if (OF_getprop(handle, "device_type", buf, sizeof buf) < 0) 447 return ENXIO; 448 #ifdef NOTDEF_DEBUG 449 printf("devopen: %s is a %s device\n", fname, buf); 450 #endif 451 #ifdef NOTDEF_DEBUG 452 printf("devopen: opening %s\n", fname); 453 #endif 454 if ((handle = OF_open(fname)) == -1) { 455 #ifdef NOTDEF_DEBUG 456 printf("devopen: open of %s failed\n", fname); 457 #endif 458 return ENXIO; 459 } 460 #ifdef NOTDEF_DEBUG 461 printf("devopen: %s is now open\n", fname); 462 #endif 463 bzero(&ofdev, sizeof ofdev); 464 ofdev.handle = handle; 465 if (!strcmp(buf, "block")) { 466 ofdev.type = OFDEV_DISK; 467 ofdev.bsize = DEV_BSIZE; 468 /* First try to find a disklabel without MBR partitions */ 469 #ifdef NOTDEF_DEBUG 470 printf("devopen: trying to read disklabel\n"); 471 #endif 472 if (strategy(&ofdev, F_READ, 473 LABELSECTOR, DEV_BSIZE, buf, &read) != 0 474 || read != DEV_BSIZE 475 || (errmsg = getdisklabel(buf, &label))) { 476 if (errmsg) printf("devopen: getdisklabel sez %s\n", errmsg); 477 /* Else try MBR partitions */ 478 errmsg = search_label(&ofdev, 0, buf, &label, 0); 479 if (errmsg) { 480 printf("devopen: search_label sez %s\n", errmsg); 481 error = ERDLAB; 482 } 483 if (error && error != ERDLAB) 484 goto bad; 485 } 486 487 if (error == ERDLAB) { 488 if (partition) 489 /* User specified a parititon, but there is none */ 490 goto bad; 491 /* No, label, just use complete disk */ 492 ofdev.partoff = 0; 493 } else { 494 part = partition ? partition - 'a' : 0; 495 ofdev.partoff = label.d_partitions[part].p_offset; 496 #ifdef NOTDEF_DEBUG 497 printf("devopen: setting partition %d offset %x\n", 498 part, ofdev.partoff); 499 #endif 500 if (label.d_partitions[part].p_fstype == FS_RAID) { 501 ofdev.partoff += RF_PROTECTED_SECTORS; 502 #ifdef NOTDEF_DEBUG 503 printf("devopen: found RAID partition, " 504 "adjusting offset to %x", ofdev.partoff); 505 #endif 506 } 507 } 508 509 of->f_dev = devsw; 510 of->f_devdata = &ofdev; 511 #ifdef SPARC_BOOT_UFS 512 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 513 #endif 514 #ifdef SPARC_BOOT_HSFS 515 bcopy(&file_system_cd9660, &file_system[nfsys++], 516 sizeof file_system[0]); 517 #endif 518 #ifdef NOTDEF_DEBUG 519 printf("devopen: return 0\n"); 520 #endif 521 return 0; 522 } 523 #ifdef NETBOOT 524 if (!strcmp(buf, "network")) { 525 ofdev.type = OFDEV_NET; 526 of->f_dev = devsw; 527 of->f_devdata = &ofdev; 528 bcopy(&file_system_nfs, file_system, sizeof file_system[0]); 529 nfsys = 1; 530 if (error = net_open(&ofdev)) 531 goto bad; 532 return 0; 533 } 534 #endif 535 error = EFTYPE; 536 bad: 537 #ifdef NOTDEF_DEBUG 538 printf("devopen: error %d, cannot open device\n", error); 539 #endif 540 OF_close(handle); 541 ofdev.handle = -1; 542 return error; 543 } 544