1 /* $NetBSD: ofdev.c,v 1.35 2014/02/20 15:11:36 joerg 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/lfs.h> 45 #include <lib/libsa/cd9660.h> 46 #ifdef NETBOOT 47 #include <lib/libsa/nfs.h> 48 #include <lib/libsa/tftp.h> 49 #endif 50 #include <lib/libkern/libkern.h> 51 52 #include <dev/sun/disklabel.h> 53 #include <dev/raidframe/raidframevar.h> 54 55 #include <machine/promlib.h> 56 57 #include "ofdev.h" 58 #include "boot.h" 59 #include "net.h" 60 61 extern char bootdev[]; 62 extern bool root_fs_quickseekable; 63 64 /* 65 * This is ugly. A path on a sparc machine is something like this: 66 * 67 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 68 * 69 */ 70 71 char * 72 filename(char *str, char *ppart) 73 { 74 char *cp, *lp; 75 char savec; 76 int dhandle; 77 char devtype[16]; 78 79 lp = str; 80 devtype[0] = 0; 81 *ppart = '\0'; 82 for (cp = str; *cp; lp = cp) { 83 /* For each component of the path name... */ 84 while (*++cp && *cp != '/'); 85 savec = *cp; 86 *cp = 0; 87 /* ...look whether there is a device with this name */ 88 dhandle = prom_finddevice(str); 89 DPRINTF(("filename: prom_finddevice(%s) returned %x\n", 90 str, dhandle)); 91 *cp = savec; 92 if (dhandle == -1) { 93 /* 94 * if not, lp is the delimiter between device and 95 * path. if the last component was a block device. 96 */ 97 if (!strcmp(devtype, "block")) { 98 /* search for arguments */ 99 DPRINTF(("filename: hunting for arguments " 100 "in %s\n", lp)); 101 for (cp = lp; ; ) { 102 cp--; 103 if (cp < str || 104 cp[0] == '/' || 105 (cp[0] == ' ' && (cp+1) != lp && 106 cp[1] == '-')) 107 break; 108 } 109 if (cp >= str && *cp == '-') 110 /* found arguments, make firmware 111 ignore them */ 112 *cp = 0; 113 for (cp = lp; *--cp && *cp != ',' 114 && *cp != ':';) 115 ; 116 if (cp[0] == ':' && cp[1] >= 'a' && 117 cp[1] <= 'a' + MAXPARTITIONS) { 118 *ppart = cp[1]; 119 cp[0] = '\0'; 120 } 121 } 122 DPRINTF(("filename: found %s\n",lp)); 123 return lp; 124 } else if (_prom_getprop(dhandle, "device_type", devtype, 125 sizeof devtype) < 0) 126 devtype[0] = 0; 127 } 128 DPRINTF(("filename: not found\n")); 129 return 0; 130 } 131 132 static int 133 strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf, 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 (prom_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 = prom_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(struct open_file *of) 174 { 175 struct of_dev *op = of->f_devdata; 176 177 #ifdef NETBOOT 178 if (op->type == OFDEV_NET) 179 net_close(op); 180 #endif 181 prom_close(op->handle); 182 op->handle = -1; 183 return 0; 184 } 185 186 static struct devsw ofdevsw[1] = { 187 { 188 "OpenFirmware", 189 strategy, 190 (int (*)(struct open_file *, ...))nodev, 191 devclose, 192 noioctl 193 } 194 }; 195 int ndevs = sizeof ofdevsw / sizeof ofdevsw[0]; 196 197 198 #ifdef SPARC_BOOT_UFS 199 static struct fs_ops file_system_ufs[] = 200 { FS_OPS(ufs), FS_OPS(ffsv2), FS_OPS(lfsv1), FS_OPS(lfsv2) }; 201 #endif 202 #ifdef SPARC_BOOT_CD9660 203 static struct fs_ops file_system_cd9660 = FS_OPS(cd9660); 204 #endif 205 #ifdef NETBOOT 206 static struct fs_ops file_system_nfs = FS_OPS(nfs); 207 static struct fs_ops file_system_tftp = FS_OPS(tftp); 208 #endif 209 210 struct fs_ops file_system[7]; 211 int nfsys; 212 213 static struct of_dev ofdev = { 214 -1, 215 }; 216 217 char opened_name[256]; 218 int floppyboot; 219 220 /************************************************************************ 221 * 222 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 223 * and then substantially rewritten by Gordon W. Ross 224 * 225 ************************************************************************/ 226 227 /* What partition types to assume for Sun disklabels: */ 228 static u_char 229 sun_fstypes[8] = { 230 FS_BSDFFS, /* a */ 231 FS_SWAP, /* b */ 232 FS_OTHER, /* c - whole disk */ 233 FS_BSDFFS, /* d */ 234 FS_BSDFFS, /* e */ 235 FS_BSDFFS, /* f */ 236 FS_BSDFFS, /* g */ 237 FS_BSDFFS, /* h */ 238 }; 239 240 /* 241 * Given a SunOS disk label, set lp to a BSD disk label. 242 * Returns NULL on success, else an error string. 243 * 244 * The BSD label is cleared out before this is called. 245 */ 246 static char * 247 disklabel_sun_to_bsd(char *cp, struct disklabel *lp) 248 { 249 struct sun_disklabel *sl; 250 struct partition *npp; 251 struct sun_dkpart *spp; 252 int i, secpercyl; 253 u_short cksum, *sp1, *sp2; 254 255 sl = (struct sun_disklabel *)cp; 256 257 /* Verify the XOR check. */ 258 sp1 = (u_short *)sl; 259 sp2 = (u_short *)(sl + 1); 260 cksum = 0; 261 while (sp1 < sp2) 262 cksum ^= *sp1++; 263 if (cksum != 0) 264 return("SunOS disk label, bad checksum"); 265 266 /* Format conversion. */ 267 lp->d_magic = DISKMAGIC; 268 lp->d_magic2 = DISKMAGIC; 269 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 270 271 lp->d_secsize = 512; 272 lp->d_nsectors = sl->sl_nsectors; 273 lp->d_ntracks = sl->sl_ntracks; 274 lp->d_ncylinders = sl->sl_ncylinders; 275 276 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 277 lp->d_secpercyl = secpercyl; 278 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 279 280 lp->d_sparespercyl = sl->sl_sparespercyl; 281 lp->d_acylinders = sl->sl_acylinders; 282 lp->d_rpm = sl->sl_rpm; 283 lp->d_interleave = sl->sl_interleave; 284 285 lp->d_npartitions = 8; 286 /* These are as defined in <ufs/ffs/fs.h> */ 287 lp->d_bbsize = 8192; /* XXX */ 288 lp->d_sbsize = 8192; /* XXX */ 289 290 for (i = 0; i < 8; i++) { 291 spp = &sl->sl_part[i]; 292 npp = &lp->d_partitions[i]; 293 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 294 npp->p_size = spp->sdkp_nsectors; 295 DPRINTF(("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size)); 296 if (npp->p_size == 0) { 297 npp->p_fstype = FS_UNUSED; 298 } else { 299 npp->p_fstype = sun_fstypes[i]; 300 if (npp->p_fstype == FS_BSDFFS) { 301 /* 302 * The sun label does not store the FFS fields, 303 * so just set them with default values here. 304 */ 305 npp->p_fsize = 1024; 306 npp->p_frag = 8; 307 npp->p_cpg = 16; 308 } 309 } 310 } 311 312 lp->d_checksum = 0; 313 lp->d_checksum = dkcksum(lp); 314 DPRINTF(("disklabel_sun_to_bsd: success!\n")); 315 return (NULL); 316 } 317 318 /* 319 * Find a valid disklabel. 320 */ 321 static char * 322 search_label(struct of_dev *devp, u_long off, char *buf, 323 struct disklabel *lp, u_long off0) 324 { 325 size_t readsize; 326 struct disklabel *dlp; 327 struct sun_disklabel *slp; 328 329 /* minimal requirements for archtypal disk label */ 330 if (lp->d_secperunit == 0) 331 lp->d_secperunit = 0x1fffffff; 332 lp->d_npartitions = 1; 333 if (lp->d_partitions[0].p_size == 0) 334 lp->d_partitions[0].p_size = 0x1fffffff; 335 lp->d_partitions[0].p_offset = 0; 336 337 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &readsize) 338 || readsize != DEV_BSIZE) 339 return ("Cannot read label"); 340 /* Check for a NetBSD disk label. */ 341 dlp = (struct disklabel *) (buf + LABELOFFSET); 342 if (dlp->d_magic == DISKMAGIC) { 343 if (dkcksum(dlp)) 344 return ("NetBSD disk label corrupted"); 345 *lp = *dlp; 346 DPRINTF(("search_label: found NetBSD label\n")); 347 return (NULL); 348 } 349 350 /* Check for a Sun disk label (for PROM compatibility). */ 351 slp = (struct sun_disklabel *) buf; 352 if (slp->sl_magic == SUN_DKMAGIC) 353 return (disklabel_sun_to_bsd(buf, lp)); 354 355 356 memset(buf, 0, DEV_BSIZE); 357 return ("no disk label"); 358 } 359 360 int 361 devopen(struct open_file *of, const char *name, char **file) 362 { 363 char *cp; 364 char partition; 365 char fname[256], devname[256]; 366 union { 367 char buf[DEV_BSIZE]; 368 struct disklabel label; 369 } b; 370 struct disklabel label; 371 int handle, part, try = 0; 372 size_t readsize; 373 char *errmsg = NULL, *pp = NULL, savedpart = 0; 374 int error = 0; 375 376 if (ofdev.handle != -1) 377 panic("devopen: ofdev already in use"); 378 if (of->f_flags != F_READ) 379 return EPERM; 380 DPRINTF(("devopen: you want %s\n", name)); 381 strcpy(fname, name); 382 cp = filename(fname, &partition); 383 if (cp) { 384 strcpy(b.buf, cp); 385 *cp = 0; 386 } 387 if (!cp || !b.buf[0]) 388 strcpy(b.buf, DEFAULT_KERNEL); 389 if (!*fname) 390 strcpy(fname, bootdev); 391 strcpy(opened_name, fname); 392 if (partition) { 393 cp = opened_name + strlen(opened_name); 394 *cp++ = ':'; 395 *cp++ = partition; 396 *cp = 0; 397 } 398 *file = opened_name + strlen(opened_name); 399 if (b.buf[0] != '/') 400 strcat(opened_name, "/"); 401 strcat(opened_name, b.buf); 402 DPRINTF(("devopen: trying %s\n", fname)); 403 if ((handle = prom_finddevice(fname)) == -1) 404 return ENOENT; 405 DPRINTF(("devopen: found %s\n", fname)); 406 if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0) 407 return ENXIO; 408 DPRINTF(("devopen: %s is called %s\n", fname, b.buf)); 409 floppyboot = !strcmp(b.buf, "floppy"); 410 if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0) 411 return ENXIO; 412 DPRINTF(("devopen: %s is a %s device\n", fname, b.buf)); 413 if (!strcmp(b.buf, "block")) { 414 pp = strrchr(fname, ':'); 415 if (pp && pp[1] >= 'a' && pp[1] <= 'f' && pp[2] == 0) { 416 savedpart = pp[1]; 417 } else { 418 savedpart = 'a'; 419 handle = prom_open(fname); 420 if (handle != -1) { 421 OF_instance_to_path(handle, devname, 422 sizeof(devname)); 423 DPRINTF(("real path: %s\n", devname)); 424 prom_close(handle); 425 pp = devname + strlen(devname); 426 if (pp > devname + 3) pp -= 2; 427 if (pp[0] == ':') 428 savedpart = pp[1]; 429 } 430 pp = fname + strlen(fname); 431 pp[0] = ':'; 432 pp[2] = '\0'; 433 } 434 pp[1] = 'c'; 435 DPRINTF(("devopen: replacing by whole disk device %s\n", 436 fname)); 437 if (savedpart) 438 partition = savedpart; 439 } 440 441 open_again: 442 DPRINTF(("devopen: opening %s\n", fname)); 443 if ((handle = prom_open(fname)) == -1) { 444 DPRINTF(("devopen: open of %s failed\n", fname)); 445 if (pp && savedpart) { 446 if (try == 0) { 447 pp[0] = '\0'; 448 try = 1; 449 } else { 450 pp[0] = ':'; 451 pp[1] = savedpart; 452 pp = NULL; 453 savedpart = '\0'; 454 } 455 goto open_again; 456 } 457 return ENXIO; 458 } 459 DPRINTF(("devopen: %s is now open\n", fname)); 460 memset(&ofdev, 0, sizeof ofdev); 461 ofdev.handle = handle; 462 if (!strcmp(b.buf, "block")) { 463 ofdev.type = OFDEV_DISK; 464 ofdev.bsize = DEV_BSIZE; 465 /* First try to find a disklabel without MBR partitions */ 466 DPRINTF(("devopen: trying to read disklabel\n")); 467 if (strategy(&ofdev, F_READ, 468 LABELSECTOR, DEV_BSIZE, b.buf, &readsize) != 0 469 || readsize != DEV_BSIZE 470 || (errmsg = getdisklabel(b.buf, &label))) { 471 if (errmsg) { 472 DPRINTF(("devopen: getdisklabel returned %s\n", 473 errmsg)); 474 } 475 /* Else try MBR partitions */ 476 errmsg = search_label(&ofdev, 0, b.buf, &label, 0); 477 if (errmsg) { 478 printf("devopen: search_label returned %s\n", errmsg); 479 error = ERDLAB; 480 } 481 if (error && error != ERDLAB) 482 goto bad; 483 } 484 485 if (error == ERDLAB) { 486 /* No, label, just use complete disk */ 487 ofdev.partoff = 0; 488 if (pp && savedpart) { 489 pp[1] = savedpart; 490 prom_close(handle); 491 if ((handle = prom_open(fname)) == -1) { 492 DPRINTF(("devopen: open of %s failed\n", 493 fname)); 494 return ENXIO; 495 } 496 ofdev.handle = handle; 497 DPRINTF(("devopen: back to original device %s\n", 498 fname)); 499 } 500 } else { 501 part = partition ? partition - 'a' : 0; 502 ofdev.partoff = label.d_partitions[part].p_offset; 503 DPRINTF(("devopen: setting partition %d offset %lx\n", 504 part, ofdev.partoff)); 505 if (label.d_partitions[part].p_fstype == FS_RAID) { 506 ofdev.partoff += RF_PROTECTED_SECTORS; 507 DPRINTF(("devopen: found RAID partition, " 508 "adjusting offset to %lx\n", ofdev.partoff)); 509 } 510 } 511 512 nfsys = 0; 513 of->f_dev = ofdevsw; 514 of->f_devdata = &ofdev; 515 #ifdef SPARC_BOOT_UFS 516 memcpy(&file_system[nfsys++], &file_system_ufs[0], sizeof file_system[0]); 517 memcpy(&file_system[nfsys++], &file_system_ufs[1], sizeof file_system[0]); 518 memcpy(&file_system[nfsys++], &file_system_ufs[2], sizeof file_system[0]); 519 memcpy(&file_system[nfsys++], &file_system_ufs[3], sizeof file_system[0]); 520 #endif 521 #ifdef SPARC_BOOT_CD9660 522 memcpy(&file_system[nfsys++], &file_system_cd9660, sizeof file_system[0]); 523 #endif 524 DPRINTF(("devopen: return 0\n")); 525 return 0; 526 } 527 #ifdef NETBOOT 528 if (!strcmp(b.buf, "network")) { 529 if ((error = net_open(&ofdev)) != 0) 530 goto bad; 531 532 ofdev.type = OFDEV_NET; 533 of->f_dev = ofdevsw; 534 of->f_devdata = &ofdev; 535 536 if (!strncmp(*file,"/tftp:",6)) { 537 *file += 6; 538 memcpy(&file_system[0], &file_system_tftp, sizeof file_system[0]); 539 if (net_tftp_bootp((int **)&of->f_devdata)) { 540 net_close(&ofdev); 541 goto bad; 542 } 543 root_fs_quickseekable = false; 544 } else { 545 memcpy(&file_system[0], &file_system_nfs, sizeof file_system[0]); 546 if ((error = net_mountroot()) != 0) { 547 net_close(&ofdev); 548 goto bad; 549 } 550 } 551 nfsys = 1; 552 return 0; 553 } 554 #endif 555 error = EFTYPE; 556 bad: 557 DPRINTF(("devopen: error %d, cannot open device\n", error)); 558 prom_close(handle); 559 ofdev.handle = -1; 560 return error; 561 } 562