1 /* $NetBSD: ofdev.c,v 1.18 2007/10/17 19:57:16 garbled 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 #include "boot.h" 57 58 extern char bootdev[]; 59 60 /* 61 * This is ugly. A path on a sparc machine is something like this: 62 * 63 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 64 * 65 */ 66 67 char * 68 filename(char *str, char *ppart) 69 { 70 char *cp, *lp; 71 char savec; 72 int dhandle; 73 char devtype[16]; 74 75 lp = str; 76 devtype[0] = 0; 77 *ppart = '\0'; 78 for (cp = str; *cp; lp = cp) { 79 /* For each component of the path name... */ 80 while (*++cp && *cp != '/'); 81 savec = *cp; 82 *cp = 0; 83 /* ...look whether there is a device with this name */ 84 dhandle = prom_finddevice(str); 85 DPRINTF(("filename: prom_finddevice(%s) returned %x\n", 86 str, dhandle)); 87 *cp = savec; 88 if (dhandle == -1) { 89 /* 90 * if not, lp is the delimiter between device and 91 * path. if the last component was a block device. 92 */ 93 if (!strcmp(devtype, "block")) { 94 /* search for arguments */ 95 DPRINTF(("filename: hunting for arguments " 96 "in %s\n", lp)); 97 for (cp = lp; ; ) { 98 cp--; 99 if (cp < str || 100 cp[0] == '/' || 101 (cp[0] == ' ' && (cp+1) != lp && 102 cp[1] == '-')) 103 break; 104 } 105 if (cp >= str && *cp == '-') 106 /* found arguments, make firmware 107 ignore them */ 108 *cp = 0; 109 for (cp = lp; *--cp && *cp != ',' 110 && *cp != ':';) 111 ; 112 if (cp[0] == ':' && cp[1] >= 'a' && 113 cp[1] <= 'a' + MAXPARTITIONS) { 114 *ppart = cp[1]; 115 cp[0] = '\0'; 116 } 117 } 118 DPRINTF(("filename: found %s\n",lp)); 119 return lp; 120 } else if (_prom_getprop(dhandle, "device_type", devtype, 121 sizeof devtype) < 0) 122 devtype[0] = 0; 123 } 124 DPRINTF(("filename: not found\n",lp)); 125 return 0; 126 } 127 128 static int 129 strategy(devdata, rw, blk, size, buf, rsize) 130 void *devdata; 131 int rw; 132 daddr_t blk; 133 size_t size; 134 void *buf; 135 size_t *rsize; 136 { 137 struct of_dev *dev = devdata; 138 u_quad_t pos; 139 int n; 140 141 if (rw != F_READ) 142 return EPERM; 143 if (dev->type != OFDEV_DISK) 144 panic("strategy"); 145 146 #ifdef NON_DEBUG 147 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 148 (long)blk, (long)dev->partoff, (long)dev->bsize); 149 printf("strategy: seek position should be: %lx\n", 150 (long)((blk + dev->partoff) * dev->bsize)); 151 #endif 152 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 153 154 for (;;) { 155 #ifdef NON_DEBUG 156 printf("strategy: seeking to %lx\n", (long)pos); 157 #endif 158 if (prom_seek(dev->handle, pos) < 0) 159 break; 160 #ifdef NON_DEBUG 161 printf("strategy: reading %lx at %p\n", (long)size, buf); 162 #endif 163 n = prom_read(dev->handle, buf, size); 164 if (n == -2) 165 continue; 166 if (n < 0) 167 break; 168 *rsize = n; 169 return 0; 170 } 171 return EIO; 172 } 173 174 static int 175 devclose(struct open_file *of) 176 { 177 struct of_dev *op = of->f_devdata; 178 179 #ifdef NETBOOT 180 if (op->type == OFDEV_NET) 181 net_close(op); 182 #endif 183 prom_close(op->handle); 184 op->handle = -1; 185 } 186 187 static struct devsw ofdevsw[1] = { 188 "OpenFirmware", 189 strategy, 190 (int (*)(struct open_file *, ...))nodev, 191 devclose, 192 noioctl 193 }; 194 int ndevs = sizeof ofdevsw / sizeof ofdevsw[0]; 195 196 #ifdef SPARC_BOOT_UFS 197 static struct fs_ops file_system_ufs = FS_OPS(ufs); 198 #endif 199 #ifdef SPARC_BOOT_CD9660 200 static struct fs_ops file_system_cd9660 = FS_OPS(cd9660); 201 #endif 202 #ifdef NETBOOT 203 static struct fs_ops file_system_nfs = FS_OPS(nfs); 204 #endif 205 206 struct fs_ops file_system[3]; 207 int nfsys; 208 209 static struct of_dev ofdev = { 210 -1, 211 }; 212 213 char opened_name[256]; 214 int floppyboot; 215 216 static u_long 217 get_long(const void *p) 218 { 219 const unsigned char *cp = p; 220 221 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 222 } 223 /************************************************************************ 224 * 225 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 226 * and then substantially rewritten by Gordon W. Ross 227 * 228 ************************************************************************/ 229 230 /* What partition types to assume for Sun disklabels: */ 231 static u_char 232 sun_fstypes[8] = { 233 FS_BSDFFS, /* a */ 234 FS_SWAP, /* b */ 235 FS_OTHER, /* c - whole disk */ 236 FS_BSDFFS, /* d */ 237 FS_BSDFFS, /* e */ 238 FS_BSDFFS, /* f */ 239 FS_BSDFFS, /* g */ 240 FS_BSDFFS, /* h */ 241 }; 242 243 /* 244 * Given a SunOS disk label, set lp to a BSD disk label. 245 * Returns NULL on success, else an error string. 246 * 247 * The BSD label is cleared out before this is called. 248 */ 249 static char * 250 disklabel_sun_to_bsd(char *cp, struct disklabel *lp) 251 { 252 struct sun_disklabel *sl; 253 struct partition *npp; 254 struct sun_dkpart *spp; 255 int i, secpercyl; 256 u_short cksum, *sp1, *sp2; 257 258 sl = (struct sun_disklabel *)cp; 259 260 /* Verify the XOR check. */ 261 sp1 = (u_short *)sl; 262 sp2 = (u_short *)(sl + 1); 263 cksum = 0; 264 while (sp1 < sp2) 265 cksum ^= *sp1++; 266 if (cksum != 0) 267 return("SunOS disk label, bad checksum"); 268 269 /* Format conversion. */ 270 lp->d_magic = DISKMAGIC; 271 lp->d_magic2 = DISKMAGIC; 272 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 273 274 lp->d_secsize = 512; 275 lp->d_nsectors = sl->sl_nsectors; 276 lp->d_ntracks = sl->sl_ntracks; 277 lp->d_ncylinders = sl->sl_ncylinders; 278 279 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 280 lp->d_secpercyl = secpercyl; 281 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 282 283 lp->d_sparespercyl = sl->sl_sparespercyl; 284 lp->d_acylinders = sl->sl_acylinders; 285 lp->d_rpm = sl->sl_rpm; 286 lp->d_interleave = sl->sl_interleave; 287 288 lp->d_npartitions = 8; 289 /* These are as defined in <ufs/ffs/fs.h> */ 290 lp->d_bbsize = 8192; /* XXX */ 291 lp->d_sbsize = 8192; /* XXX */ 292 293 for (i = 0; i < 8; i++) { 294 spp = &sl->sl_part[i]; 295 npp = &lp->d_partitions[i]; 296 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 297 npp->p_size = spp->sdkp_nsectors; 298 DPRINTF(("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size)); 299 if (npp->p_size == 0) { 300 npp->p_fstype = FS_UNUSED; 301 } else { 302 npp->p_fstype = sun_fstypes[i]; 303 if (npp->p_fstype == FS_BSDFFS) { 304 /* 305 * The sun label does not store the FFS fields, 306 * so just set them with default values here. 307 */ 308 npp->p_fsize = 1024; 309 npp->p_frag = 8; 310 npp->p_cpg = 16; 311 } 312 } 313 } 314 315 lp->d_checksum = 0; 316 lp->d_checksum = dkcksum(lp); 317 DPRINTF(("disklabel_sun_to_bsd: success!\n")); 318 return (NULL); 319 } 320 321 /* 322 * Find a valid disklabel. 323 */ 324 static char * 325 search_label(struct of_dev *devp, u_long off, char *buf, 326 struct disklabel *lp, u_long off0) 327 { 328 size_t read; 329 struct mbr_partition *p; 330 int i; 331 u_long poff; 332 static int recursion; 333 334 struct disklabel *dlp; 335 struct sun_disklabel *slp; 336 int error; 337 338 /* minimal requirements for archtypal disk label */ 339 if (lp->d_secperunit == 0) 340 lp->d_secperunit = 0x1fffffff; 341 lp->d_npartitions = 1; 342 if (lp->d_partitions[0].p_size == 0) 343 lp->d_partitions[0].p_size = 0x1fffffff; 344 lp->d_partitions[0].p_offset = 0; 345 346 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 347 || read != DEV_BSIZE) 348 return ("Cannot read label"); 349 /* Check for a NetBSD disk label. */ 350 dlp = (struct disklabel *) (buf + LABELOFFSET); 351 if (dlp->d_magic == DISKMAGIC) { 352 if (dkcksum(dlp)) 353 return ("NetBSD disk label corrupted"); 354 *lp = *dlp; 355 DPRINTF(("search_label: found NetBSD label\n")); 356 return (NULL); 357 } 358 359 /* Check for a Sun disk label (for PROM compatibility). */ 360 slp = (struct sun_disklabel *) buf; 361 if (slp->sl_magic == SUN_DKMAGIC) 362 return (disklabel_sun_to_bsd(buf, lp)); 363 364 365 bzero(buf, sizeof(buf)); 366 return ("no disk label"); 367 } 368 369 int 370 devopen(struct open_file *of, const char *name, char **file) 371 { 372 char *cp; 373 char partition; 374 char fname[256], devname[256]; 375 union { 376 char buf[DEV_BSIZE]; 377 struct disklabel label; 378 } b; 379 struct disklabel label; 380 int handle, part, try = 0; 381 size_t read; 382 char *errmsg = NULL, *pp, savedpart = 0; 383 int error = 0; 384 385 if (ofdev.handle != -1) 386 panic("devopen"); 387 if (of->f_flags != F_READ) 388 return EPERM; 389 DPRINTF(("devopen: you want %s\n", name)); 390 strcpy(fname, name); 391 cp = filename(fname, &partition); 392 if (cp) { 393 strcpy(b.buf, cp); 394 *cp = 0; 395 } 396 if (!cp || !b.buf[0]) 397 strcpy(b.buf, DEFAULT_KERNEL); 398 if (!*fname) 399 strcpy(fname, bootdev); 400 strcpy(opened_name, fname); 401 if (partition) { 402 cp = opened_name + strlen(opened_name); 403 *cp++ = ':'; 404 *cp++ = partition; 405 *cp = 0; 406 } 407 *file = opened_name + strlen(opened_name); 408 if (b.buf[0] != '/') 409 strcat(opened_name, "/"); 410 strcat(opened_name, b.buf); 411 DPRINTF(("devopen: trying %s\n", fname)); 412 if ((handle = prom_finddevice(fname)) == -1) 413 return ENOENT; 414 DPRINTF(("devopen: found %s\n", fname)); 415 if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0) 416 return ENXIO; 417 DPRINTF(("devopen: %s is called %s\n", fname, b.buf)); 418 floppyboot = !strcmp(b.buf, "floppy"); 419 if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0) 420 return ENXIO; 421 DPRINTF(("devopen: %s is a %s device\n", fname, b.buf)); 422 if (!strcmp(b.buf, "block")) { 423 pp = strrchr(fname, ':'); 424 if (pp && pp[1] >= 'a' && pp[1] <= 'f' && pp[2] == 0) { 425 savedpart = pp[1]; 426 } else { 427 savedpart = 'a'; 428 handle = prom_open(fname); 429 if (handle != -1) { 430 OF_instance_to_path(handle, devname, 431 sizeof(devname)); 432 DPRINTF(("real path: %s\n", devname)); 433 prom_close(handle); 434 pp = devname + strlen(devname); 435 if (pp > devname + 3) pp -= 2; 436 if (pp[0] == ':') 437 savedpart = pp[1]; 438 } 439 pp = fname + strlen(fname); 440 pp[0] = ':'; 441 pp[2] = '\0'; 442 } 443 pp[1] = 'c'; 444 DPRINTF(("devopen: replacing by whole disk device %s\n", 445 fname)); 446 if (savedpart) 447 partition = savedpart; 448 } 449 450 open_again: 451 DPRINTF(("devopen: opening %s\n", fname)); 452 if ((handle = prom_open(fname)) == -1) { 453 DPRINTF(("devopen: open of %s failed\n", fname)); 454 if (pp && savedpart) { 455 if (try == 0) { 456 pp[0] = '\0'; 457 try = 1; 458 } else { 459 pp[0] = ':'; 460 pp[1] = savedpart; 461 pp = NULL; 462 savedpart = '\0'; 463 } 464 goto open_again; 465 } 466 return ENXIO; 467 } 468 DPRINTF(("devopen: %s is now open\n", fname)); 469 bzero(&ofdev, sizeof ofdev); 470 ofdev.handle = handle; 471 if (!strcmp(b.buf, "block")) { 472 ofdev.type = OFDEV_DISK; 473 ofdev.bsize = DEV_BSIZE; 474 /* First try to find a disklabel without MBR partitions */ 475 DPRINTF(("devopen: trying to read disklabel\n")); 476 if (strategy(&ofdev, F_READ, 477 LABELSECTOR, DEV_BSIZE, b.buf, &read) != 0 478 || read != DEV_BSIZE 479 || (errmsg = getdisklabel(b.buf, &label))) { 480 if (errmsg) printf("devopen: getdisklabel returned %s\n", errmsg); 481 /* Else try MBR partitions */ 482 errmsg = search_label(&ofdev, 0, b.buf, &label, 0); 483 if (errmsg) { 484 printf("devopen: search_label returned %s\n", errmsg); 485 error = ERDLAB; 486 } 487 if (error && error != ERDLAB) 488 goto bad; 489 } 490 491 if (error == ERDLAB) { 492 /* No, label, just use complete disk */ 493 ofdev.partoff = 0; 494 if (pp && savedpart) { 495 pp[1] = savedpart; 496 prom_close(handle); 497 if ((handle = prom_open(fname)) == -1) { 498 DPRINTF(("devopen: open of %s failed\n", 499 fname)); 500 return ENXIO; 501 } 502 ofdev.handle = handle; 503 DPRINTF(("devopen: back to original device %s\n", 504 fname)); 505 } 506 } else { 507 part = partition ? partition - 'a' : 0; 508 ofdev.partoff = label.d_partitions[part].p_offset; 509 DPRINTF(("devopen: setting partition %d offset %x\n", 510 part, ofdev.partoff)); 511 if (label.d_partitions[part].p_fstype == FS_RAID) { 512 ofdev.partoff += RF_PROTECTED_SECTORS; 513 DPRINTF(("devopen: found RAID partition, " 514 "adjusting offset to %x\n", ofdev.partoff)); 515 } 516 } 517 518 nfsys = 0; 519 of->f_dev = ofdevsw; 520 of->f_devdata = &ofdev; 521 #ifdef SPARC_BOOT_UFS 522 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 523 #endif 524 #ifdef SPARC_BOOT_CD9660 525 bcopy(&file_system_cd9660, &file_system[nfsys++], 526 sizeof file_system[0]); 527 #endif 528 DPRINTF(("devopen: return 0\n")); 529 return 0; 530 } 531 #ifdef NETBOOT 532 if (!strcmp(b.buf, "network")) { 533 ofdev.type = OFDEV_NET; 534 of->f_dev = ofdevsw; 535 of->f_devdata = &ofdev; 536 bcopy(&file_system_nfs, file_system, sizeof file_system[0]); 537 nfsys = 1; 538 if (error = net_open(&ofdev)) 539 goto bad; 540 return 0; 541 } 542 #endif 543 error = EFTYPE; 544 bad: 545 DPRINTF(("devopen: error %d, cannot open device\n", error)); 546 prom_close(handle); 547 ofdev.handle = -1; 548 return error; 549 } 550