ofdisk.c revision 1.50
1 /* $NetBSD: ofdisk.c,v 1.50 2014/12/31 19:52:06 christos 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 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ofdisk.c,v 1.50 2014/12/31 19:52:06 christos Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/buf.h> 39 #include <sys/device.h> 40 #include <sys/conf.h> 41 #include <sys/disklabel.h> 42 #include <sys/disk.h> 43 #include <sys/fcntl.h> 44 #include <sys/ioctl.h> 45 #include <sys/stat.h> 46 #include <sys/systm.h> 47 #include <sys/proc.h> 48 49 #include <dev/ofw/openfirm.h> 50 51 struct ofdisk_softc { 52 device_t sc_dev; 53 int sc_phandle; 54 int sc_unit; 55 int sc_flags; 56 struct disk sc_dk; 57 int sc_ihandle; 58 u_long max_transfer; 59 }; 60 61 /* sc_flags */ 62 #define OFDF_ISFLOPPY 0x01 /* we are a floppy drive */ 63 64 #define OFDISK_FLOPPY_P(of) ((of)->sc_flags & OFDF_ISFLOPPY) 65 66 static int ofdisk_match (device_t, cfdata_t, void *); 67 static void ofdisk_attach (device_t, device_t, void *); 68 69 CFATTACH_DECL_NEW(ofdisk, sizeof(struct ofdisk_softc), 70 ofdisk_match, ofdisk_attach, NULL, NULL); 71 72 extern struct cfdriver ofdisk_cd; 73 74 dev_type_open(ofdisk_open); 75 dev_type_close(ofdisk_close); 76 dev_type_read(ofdisk_read); 77 dev_type_write(ofdisk_write); 78 dev_type_ioctl(ofdisk_ioctl); 79 dev_type_strategy(ofdisk_strategy); 80 dev_type_dump(ofdisk_dump); 81 dev_type_size(ofdisk_size); 82 83 const struct bdevsw ofdisk_bdevsw = { 84 .d_open = ofdisk_open, 85 .d_close = ofdisk_close, 86 .d_strategy = ofdisk_strategy, 87 .d_ioctl = ofdisk_ioctl, 88 .d_dump = ofdisk_dump, 89 .d_psize = ofdisk_size, 90 .d_discard = nodiscard, 91 .d_flag = D_DISK 92 }; 93 94 const struct cdevsw ofdisk_cdevsw = { 95 .d_open = ofdisk_open, 96 .d_close = ofdisk_close, 97 .d_read = ofdisk_read, 98 .d_write = ofdisk_write, 99 .d_ioctl = ofdisk_ioctl, 100 .d_stop = nostop, 101 .d_tty = notty, 102 .d_poll = nopoll, 103 .d_mmap = nommap, 104 .d_kqfilter = nokqfilter, 105 .d_discard = nodiscard, 106 .d_flag = D_DISK 107 }; 108 109 static void ofminphys(struct buf *); 110 111 struct dkdriver ofdisk_dkdriver = { ofdisk_strategy, ofminphys }; 112 113 void ofdisk_getdefaultlabel (struct ofdisk_softc *, struct disklabel *); 114 void ofdisk_getdisklabel (dev_t); 115 116 static int 117 ofdisk_match(device_t parent, cfdata_t match, void *aux) 118 { 119 struct ofbus_attach_args *oba = aux; 120 char type[8]; 121 int l; 122 123 if (strcmp(oba->oba_busname, "ofw")) 124 return (0); 125 if ((l = OF_getprop(oba->oba_phandle, "device_type", type, 126 sizeof type - 1)) < 0) 127 return 0; 128 if (l >= sizeof type) 129 return 0; 130 type[l] = 0; 131 return !strcmp(type, "block"); 132 } 133 134 static void 135 ofdisk_attach(device_t parent, device_t self, void *aux) 136 { 137 struct ofdisk_softc *of = device_private(self); 138 struct ofbus_attach_args *oba = aux; 139 char child[64]; 140 int l; 141 142 of->sc_dev = self; 143 if ((l = OF_getprop(oba->oba_phandle, "name", child, 144 sizeof child - 1)) < 0) 145 panic("device without name?"); 146 if (l >= sizeof child) 147 l = sizeof child - 1; 148 child[l] = 0; 149 150 of->sc_flags = 0; 151 of->sc_phandle = oba->oba_phandle; 152 of->sc_unit = oba->oba_unit; 153 of->sc_ihandle = 0; 154 disk_init(&of->sc_dk, device_xname(of->sc_dev), &ofdisk_dkdriver); 155 disk_attach(&of->sc_dk); 156 printf("\n"); 157 158 if (strcmp(child, "floppy") == 0) 159 of->sc_flags |= OFDF_ISFLOPPY; 160 else { 161 /* Discover wedges on this disk. */ 162 dkwedge_discover(&of->sc_dk); 163 } 164 } 165 166 int 167 ofdisk_open(dev_t dev, int flags, int fmt, struct lwp *lwp) 168 { 169 struct ofdisk_softc *of; 170 char path[256]; 171 int error, l, part; 172 173 of = device_lookup_private(&ofdisk_cd, DISKUNIT(dev)); 174 if (of == NULL) 175 return ENXIO; 176 177 part = DISKPART(dev); 178 179 mutex_enter(&of->sc_dk.dk_openlock); 180 181 /* 182 * If there are wedges, and this is not RAW_PART, then we 183 * need to fail. 184 */ 185 if (of->sc_dk.dk_nwedges != 0 && part != RAW_PART) { 186 error = EBUSY; 187 goto bad1; 188 } 189 190 if (!of->sc_ihandle) { 191 if ((l = OF_package_to_path(of->sc_phandle, path, 192 sizeof path - 3)) < 0 || 193 l >= sizeof path - 3) { 194 error = ENXIO; 195 goto bad1; 196 } 197 path[l] = 0; 198 199 /* 200 * XXX This is for the benefit of SCSI/IDE disks that don't 201 * XXX have all their childs in the device tree. 202 * XXX YES, I DO THINK THIS IS A BUG IN OPENFIRMWARE!!! 203 * XXX And yes, this is a very gross hack! 204 * XXX See also ofscsi.c 205 */ 206 if (!strcmp(path + l - 4, "disk")) { 207 path[l++] = '@'; 208 path[l++] = '0' + of->sc_unit; 209 path[l] = 0; 210 } 211 212 strlcat(path, ":0", sizeof(path)); 213 214 if ((of->sc_ihandle = OF_open(path)) == -1) { 215 error = ENXIO; 216 goto bad1; 217 } 218 219 /* 220 * Try to get characteristics of the disk. 221 */ 222 of->max_transfer = OF_call_method_1("max-transfer", 223 of->sc_ihandle, 0); 224 if (of->max_transfer > MAXPHYS) 225 of->max_transfer = MAXPHYS; 226 227 ofdisk_getdisklabel(dev); 228 } 229 230 switch (fmt) { 231 case S_IFCHR: 232 of->sc_dk.dk_copenmask |= 1 << part; 233 break; 234 case S_IFBLK: 235 of->sc_dk.dk_bopenmask |= 1 << part; 236 break; 237 } 238 of->sc_dk.dk_openmask = 239 of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask; 240 241 242 error = 0; 243 bad1: 244 mutex_exit(&of->sc_dk.dk_openlock); 245 return (error); 246 } 247 248 int 249 ofdisk_close(dev_t dev, int flags, int fmt, struct lwp *l) 250 { 251 struct ofdisk_softc *of = 252 device_lookup_private(&ofdisk_cd, DISKUNIT(dev)); 253 254 mutex_enter(&of->sc_dk.dk_openlock); 255 256 switch (fmt) { 257 case S_IFCHR: 258 of->sc_dk.dk_copenmask &= ~(1 << DISKPART(dev)); 259 break; 260 case S_IFBLK: 261 of->sc_dk.dk_bopenmask &= ~(1 << DISKPART(dev)); 262 break; 263 } 264 of->sc_dk.dk_openmask = of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask; 265 266 #ifdef FIRMWORKSBUGS 267 /* 268 * This is a hack to get the firmware to flush its buffers. 269 */ 270 OF_seek(of->sc_ihandle, 0); 271 #endif 272 if (!of->sc_dk.dk_openmask) { 273 OF_close(of->sc_ihandle); 274 of->sc_ihandle = 0; 275 } 276 277 mutex_exit(&of->sc_dk.dk_openlock); 278 return 0; 279 } 280 281 void 282 ofdisk_strategy(struct buf *bp) 283 { 284 struct ofdisk_softc *of = 285 device_lookup_private(&ofdisk_cd, DISKUNIT(bp->b_dev)); 286 struct partition *p; 287 u_quad_t off; 288 int read; 289 int (*OF_io)(int, void *, int); 290 daddr_t blkno = bp->b_blkno; 291 292 bp->b_resid = 0; 293 if (bp->b_bcount == 0) 294 goto done; 295 296 OF_io = bp->b_flags & B_READ ? OF_read : 297 (int(*)(int, void*, int))OF_write; 298 299 if (DISKPART(bp->b_dev) != RAW_PART) { 300 if (bounds_check_with_label(&of->sc_dk, bp, 0) <= 0) { 301 bp->b_resid = bp->b_bcount; 302 goto done; 303 } 304 p = &of->sc_dk.dk_label->d_partitions[DISKPART(bp->b_dev)]; 305 blkno = bp->b_blkno + p->p_offset; 306 } 307 308 disk_busy(&of->sc_dk); 309 310 off = (u_quad_t)blkno * DEV_BSIZE; 311 read = -1; 312 do { 313 if (OF_seek(of->sc_ihandle, off) < 0) 314 break; 315 read = OF_io(of->sc_ihandle, bp->b_data, bp->b_bcount); 316 } while (read == -2); 317 318 if (read < 0) { 319 bp->b_error = EIO; 320 bp->b_resid = bp->b_bcount; 321 } else 322 bp->b_resid = bp->b_bcount - read; 323 324 disk_unbusy(&of->sc_dk, bp->b_bcount - bp->b_resid, 325 (bp->b_flags & B_READ)); 326 327 done: 328 biodone(bp); 329 } 330 331 static void 332 ofminphys(struct buf *bp) 333 { 334 struct ofdisk_softc *of = 335 device_lookup_private(&ofdisk_cd, DISKUNIT(bp->b_dev)); 336 337 if (bp->b_bcount > of->max_transfer) 338 bp->b_bcount = of->max_transfer; 339 } 340 341 int 342 ofdisk_read(dev_t dev, struct uio *uio, int flags) 343 { 344 return physio(ofdisk_strategy, NULL, dev, B_READ, ofminphys, uio); 345 } 346 347 int 348 ofdisk_write(dev_t dev, struct uio *uio, int flags) 349 { 350 return physio(ofdisk_strategy, NULL, dev, B_WRITE, ofminphys, uio); 351 } 352 353 int 354 ofdisk_ioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 355 { 356 struct ofdisk_softc *of = 357 device_lookup_private(&ofdisk_cd, DISKUNIT(dev)); 358 int error; 359 #ifdef __HAVE_OLD_DISKLABEL 360 struct disklabel newlabel; 361 #endif 362 /* XXX: Why not allow wedges on floppy? */ 363 switch (cmd) { 364 case DIOCDWEDGE: 365 case DIOCAWEDGE: 366 case DIOCLWEDGES: 367 case DIOCMWEDGES: 368 if (OFDISK_FLOPPY_P(of)) 369 return ENOTTY; 370 } 371 372 error = disk_ioctl(&of->sc_dk, dev, cmd, data, flag, l); 373 if (error != EPASSTHROUGH) 374 return error; 375 376 switch (cmd) { 377 case DIOCWDINFO: 378 case DIOCSDINFO: 379 #ifdef __HAVE_OLD_DISKLABEL 380 case ODIOCWDINFO: 381 case ODIOCSDINFO: 382 #endif 383 { 384 struct disklabel *lp; 385 386 #ifdef __HAVE_OLD_DISKLABEL 387 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 388 memset(&newlabel, 0, sizeof newlabel); 389 memcpy(&newlabel, data, sizeof (struct olddisklabel)); 390 lp = &newlabel; 391 } else 392 #endif 393 lp = (struct disklabel *)data; 394 395 if ((flag & FWRITE) == 0) 396 return EBADF; 397 398 mutex_enter(&of->sc_dk.dk_openlock); 399 400 error = setdisklabel(of->sc_dk.dk_label, 401 lp, /*of->sc_dk.dk_openmask */0, 402 of->sc_dk.dk_cpulabel); 403 if (error == 0 && cmd == DIOCWDINFO 404 #ifdef __HAVE_OLD_DISKLABEL 405 || xfer == ODIOCWDINFO 406 #endif 407 ) 408 error = writedisklabel(MAKEDISKDEV(major(dev), 409 DISKUNIT(dev), RAW_PART), ofdisk_strategy, 410 of->sc_dk.dk_label, of->sc_dk.dk_cpulabel); 411 412 mutex_exit(&of->sc_dk.dk_openlock); 413 414 return error; 415 } 416 417 case DIOCGDEFLABEL: 418 ofdisk_getdefaultlabel(of, (struct disklabel *)data); 419 return 0; 420 #ifdef __HAVE_OLD_DISKLABEL 421 case DIOCGDEFLABEL: 422 ofdisk_getdefaultlabel(of, &newlabel); 423 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 424 return ENOTTY; 425 memcpy(data, &newlabel, sizeof (struct olddisklabel)); 426 return 0; 427 #endif 428 429 default: 430 return ENOTTY; 431 } 432 } 433 434 int 435 ofdisk_dump(dev_t dev, daddr_t blkno, void *va, size_t size) 436 { 437 return EINVAL; 438 } 439 440 int 441 ofdisk_size(dev_t dev) 442 { 443 struct ofdisk_softc *of; 444 struct disklabel *lp; 445 int size, part, omask; 446 447 of = device_lookup_private(&ofdisk_cd, DISKUNIT(dev)); 448 if (of == NULL) 449 return ENXIO; 450 451 part = DISKPART(dev); 452 omask = of->sc_dk.dk_openmask & (1 << part); 453 lp = of->sc_dk.dk_label; 454 455 if (omask == 0 && ofdisk_open(dev, 0, S_IFBLK, curlwp) != 0) 456 return -1; 457 458 if (lp->d_partitions[part].p_fstype != FS_SWAP) 459 size = -1; 460 else 461 size = lp->d_partitions[part].p_size * 462 (lp->d_secsize / DEV_BSIZE); 463 464 if (omask == 0 && ofdisk_close(dev, 0, S_IFBLK, curlwp) != 0) 465 return -1; 466 467 return size; 468 } 469 470 void 471 ofdisk_getdefaultlabel(struct ofdisk_softc *of, struct disklabel *lp) 472 { 473 474 memset(lp, 0, sizeof *lp); 475 476 /* 477 * XXX Firmware bug? Asking for block size gives a 478 * XXX ridiculous number! So we use what the boot program 479 * XXX uses. 480 */ 481 lp->d_secsize = DEV_BSIZE; 482 483 lp->d_secperunit = OF_call_method_1("#blocks", 484 of->sc_ihandle, 0); 485 if (lp->d_secperunit == (u_int32_t)-1) 486 lp->d_secperunit = 0x7fffffff; 487 488 lp->d_secpercyl = 1; 489 lp->d_nsectors = 1; 490 lp->d_ntracks = 1; 491 lp->d_ncylinders = lp->d_secperunit; 492 493 lp->d_partitions[RAW_PART].p_offset = 0; 494 lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; 495 lp->d_npartitions = RAW_PART + 1; 496 497 lp->d_magic = DISKMAGIC; 498 lp->d_magic2 = DISKMAGIC; 499 lp->d_checksum = dkcksum(lp); 500 } 501 502 void 503 ofdisk_getdisklabel(dev_t dev) 504 { 505 int unit = DISKUNIT(dev); 506 struct ofdisk_softc *of = 507 device_lookup_private(&ofdisk_cd, unit); 508 struct disklabel *lp = of->sc_dk.dk_label; 509 const char *errmes; 510 int l; 511 512 ofdisk_getdefaultlabel(of, lp); 513 514 /* 515 * Don't read the disklabel on a floppy; simply 516 * assign all partitions the same size/offset as 517 * RAW_PART. (This is essentially what the ISA 518 * floppy driver does, but we don't deal with 519 * density stuff.) 520 */ 521 if (OFDISK_FLOPPY_P(of)) { 522 lp->d_npartitions = MAXPARTITIONS; 523 for (l = 0; l < lp->d_npartitions; l++) { 524 if (l == RAW_PART) 525 continue; 526 /* struct copy */ 527 lp->d_partitions[l] = 528 lp->d_partitions[RAW_PART]; 529 } 530 lp->d_checksum = dkcksum(lp); 531 } else { 532 errmes = readdisklabel(MAKEDISKDEV(major(dev), 533 unit, RAW_PART), ofdisk_strategy, lp, 534 of->sc_dk.dk_cpulabel); 535 if (errmes != NULL) 536 printf("%s: %s\n", device_xname(of->sc_dev), errmes); 537 } 538 } 539
Indexes created Thu Sep 25 02:09:54 GMT 2025