1 /* $NetBSD: ofdisk.c,v 1.20 2002/09/18 01:46:40 chs 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 1.20 2002/09/18 01:46:40 chs 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 #include <sys/conf.h> 49 50 #include <dev/ofw/openfirm.h> 51 52 struct ofdisk_softc { 53 struct device sc_dev; 54 int sc_phandle; 55 int sc_unit; 56 int sc_flags; 57 struct disk sc_dk; 58 int sc_ihandle; 59 u_long max_transfer; 60 char sc_name[16]; 61 }; 62 63 /* sc_flags */ 64 #define OFDF_ISFLOPPY 0x01 /* we are a floppy drive */ 65 66 static int ofdisk_match (struct device *, struct cfdata *, void *); 67 static void ofdisk_attach (struct device *, struct device *, void *); 68 69 struct cfattach ofdisk_ca = { 70 sizeof(struct ofdisk_softc), ofdisk_match, ofdisk_attach 71 }; 72 73 extern struct cfdriver ofdisk_cd; 74 75 dev_type_open(ofdisk_open); 76 dev_type_close(ofdisk_close); 77 dev_type_read(ofdisk_read); 78 dev_type_write(ofdisk_write); 79 dev_type_ioctl(ofdisk_ioctl); 80 dev_type_strategy(ofdisk_strategy); 81 dev_type_dump(ofdisk_dump); 82 dev_type_size(ofdisk_size); 83 84 const struct bdevsw ofdisk_bdevsw = { 85 ofdisk_open, ofdisk_close, ofdisk_strategy, ofdisk_ioctl, 86 ofdisk_dump, ofdisk_size, D_DISK 87 }; 88 89 const struct cdevsw ofdisk_cdevsw = { 90 ofdisk_open, ofdisk_close, ofdisk_read, ofdisk_write, ofdisk_ioctl, 91 nostop, notty, nopoll, nommap, D_DISK 92 }; 93 94 struct dkdriver ofdisk_dkdriver = { ofdisk_strategy }; 95 96 void ofdisk_getdefaultlabel (struct ofdisk_softc *, struct disklabel *); 97 void ofdisk_getdisklabel (dev_t); 98 99 static int 100 ofdisk_match(struct device *parent, struct cfdata *match, void *aux) 101 { 102 struct ofbus_attach_args *oba = aux; 103 char type[8]; 104 int l; 105 106 if (strcmp(oba->oba_busname, "ofw")) 107 return (0); 108 if ((l = OF_getprop(oba->oba_phandle, "device_type", type, 109 sizeof type - 1)) < 0) 110 return 0; 111 if (l >= sizeof type) 112 return 0; 113 type[l] = 0; 114 return !strcmp(type, "block"); 115 } 116 117 static void 118 ofdisk_attach(struct device *parent, struct device *self, void *aux) 119 { 120 struct ofdisk_softc *of = (void *)self; 121 struct ofbus_attach_args *oba = aux; 122 char child[64]; 123 int l; 124 125 if ((l = OF_getprop(oba->oba_phandle, "name", child, 126 sizeof child - 1)) < 0) 127 panic("device without name?"); 128 if (l >= sizeof child) 129 l = sizeof child - 1; 130 child[l] = 0; 131 132 of->sc_flags = 0; 133 of->sc_phandle = oba->oba_phandle; 134 of->sc_unit = oba->oba_unit; 135 of->sc_ihandle = 0; 136 of->sc_dk.dk_driver = &ofdisk_dkdriver; 137 of->sc_dk.dk_name = of->sc_name; 138 strcpy(of->sc_name, of->sc_dev.dv_xname); 139 disk_attach(&of->sc_dk); 140 printf("\n"); 141 142 if (strcmp(child, "floppy") == 0) 143 of->sc_flags |= OFDF_ISFLOPPY; 144 } 145 146 int 147 ofdisk_open(dev_t dev, int flags, int fmt, struct proc *p) 148 { 149 int unit = DISKUNIT(dev); 150 struct ofdisk_softc *of; 151 char path[256]; 152 int l; 153 154 if (unit >= ofdisk_cd.cd_ndevs) 155 return ENXIO; 156 if (!(of = ofdisk_cd.cd_devs[unit])) 157 return ENXIO; 158 159 if (!of->sc_ihandle) { 160 if ((l = OF_package_to_path(of->sc_phandle, path, 161 sizeof path - 3)) < 0 || 162 l >= sizeof path - 3) 163 return ENXIO; 164 path[l] = 0; 165 166 /* 167 * XXX This is for the benefit of SCSI/IDE disks that don't 168 * XXX have all their childs in the device tree. 169 * XXX YES, I DO THINK THIS IS A BUG IN OPENFIRMWARE!!! 170 * XXX And yes, this is a very gross hack! 171 * XXX See also ofscsi.c 172 */ 173 if (!strcmp(path + l - 4, "disk")) { 174 path[l++] = '@'; 175 path[l++] = '0' + of->sc_unit; 176 path[l] = 0; 177 } 178 179 strcat(path, ":0"); 180 181 if ((of->sc_ihandle = OF_open(path)) == -1) 182 return ENXIO; 183 184 /* 185 * Try to get characteristics of the disk. 186 */ 187 of->max_transfer = OF_call_method_1("max-transfer", 188 of->sc_ihandle, 0); 189 if (of->max_transfer > MAXPHYS) 190 of->max_transfer = MAXPHYS; 191 192 ofdisk_getdisklabel(dev); 193 } 194 195 switch (fmt) { 196 case S_IFCHR: 197 of->sc_dk.dk_copenmask |= 1 << DISKPART(dev); 198 break; 199 case S_IFBLK: 200 of->sc_dk.dk_bopenmask |= 1 << DISKPART(dev); 201 break; 202 } 203 of->sc_dk.dk_openmask = 204 of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask; 205 206 return 0; 207 } 208 209 int 210 ofdisk_close(dev_t dev, int flags, int fmt, struct proc *p) 211 { 212 struct ofdisk_softc *of = ofdisk_cd.cd_devs[DISKUNIT(dev)]; 213 214 switch (fmt) { 215 case S_IFCHR: 216 of->sc_dk.dk_copenmask &= ~(1 << DISKPART(dev)); 217 break; 218 case S_IFBLK: 219 of->sc_dk.dk_bopenmask &= ~(1 << DISKPART(dev)); 220 break; 221 } 222 of->sc_dk.dk_openmask = of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask; 223 224 #ifdef FIRMWORKSBUGS 225 /* 226 * This is a hack to get the firmware to flush its buffers. 227 */ 228 OF_seek(of->sc_ihandle, 0); 229 #endif 230 if (!of->sc_dk.dk_openmask) { 231 OF_close(of->sc_ihandle); 232 of->sc_ihandle = 0; 233 } 234 235 return 0; 236 } 237 238 void 239 ofdisk_strategy(struct buf *bp) 240 { 241 struct ofdisk_softc *of = ofdisk_cd.cd_devs[DISKUNIT(bp->b_dev)]; 242 struct partition *p; 243 u_quad_t off; 244 int read; 245 int (*OF_io)(int, void *, int); 246 daddr_t blkno = bp->b_blkno; 247 248 bp->b_resid = 0; 249 if (bp->b_bcount == 0) 250 goto done; 251 252 OF_io = bp->b_flags & B_READ ? OF_read : OF_write; 253 254 if (DISKPART(bp->b_dev) != RAW_PART) { 255 if (bounds_check_with_label(bp, of->sc_dk.dk_label, 0) <= 0) { 256 bp->b_resid = bp->b_bcount; 257 goto done; 258 } 259 p = &of->sc_dk.dk_label->d_partitions[DISKPART(bp->b_dev)]; 260 blkno = bp->b_blkno + p->p_offset; 261 } 262 263 disk_busy(&of->sc_dk); 264 265 off = (u_quad_t)blkno * DEV_BSIZE; 266 read = -1; 267 do { 268 if (OF_seek(of->sc_ihandle, off) < 0) 269 break; 270 read = OF_io(of->sc_ihandle, bp->b_data, bp->b_bcount); 271 } while (read == -2); 272 273 if (read < 0) { 274 bp->b_error = EIO; 275 bp->b_flags |= B_ERROR; 276 bp->b_resid = bp->b_bcount; 277 } else 278 bp->b_resid = bp->b_bcount - read; 279 280 disk_unbusy(&of->sc_dk, bp->b_bcount - bp->b_resid); 281 282 done: 283 biodone(bp); 284 } 285 286 static void 287 ofminphys(struct buf *bp) 288 { 289 struct ofdisk_softc *of = ofdisk_cd.cd_devs[DISKUNIT(bp->b_dev)]; 290 291 if (bp->b_bcount > of->max_transfer) 292 bp->b_bcount = of->max_transfer; 293 } 294 295 int 296 ofdisk_read(dev_t dev, struct uio *uio, int flags) 297 { 298 return physio(ofdisk_strategy, NULL, dev, B_READ, ofminphys, uio); 299 } 300 301 int 302 ofdisk_write(dev_t dev, struct uio *uio, int flags) 303 { 304 return physio(ofdisk_strategy, NULL, dev, B_WRITE, ofminphys, uio); 305 } 306 307 int 308 ofdisk_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 309 { 310 struct ofdisk_softc *of = ofdisk_cd.cd_devs[DISKUNIT(dev)]; 311 int error; 312 #ifdef __HAVE_OLD_DISKLABEL 313 struct disklabel newlabel; 314 #endif 315 316 switch (cmd) { 317 case DIOCGDINFO: 318 *(struct disklabel *)data = *of->sc_dk.dk_label; 319 return 0; 320 #ifdef __HAVE_OLD_DISKLABEL 321 case ODIOCGDINFO: 322 newlabel = *of->sc_dk.dk_label; 323 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 324 return ENOTTY; 325 memcpy(data, &newlabel, sizeof (struct olddisklabel)); 326 return 0; 327 #endif 328 329 case DIOCGPART: 330 ((struct partinfo *)data)->disklab = of->sc_dk.dk_label; 331 ((struct partinfo *)data)->part = 332 &of->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 333 return 0; 334 335 case DIOCWDINFO: 336 case DIOCSDINFO: 337 #ifdef __HAVE_OLD_DISKLABEL 338 case ODIOCWDINFO: 339 case ODIOCSDINFO: 340 #endif 341 { 342 struct disklabel *lp; 343 344 #ifdef __HAVE_OLD_DISKLABEL 345 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 346 memset(&newlabel, 0, sizeof newlabel); 347 memcpy(&newlabel, data, sizeof (struct olddisklabel)); 348 lp = &newlabel; 349 } else 350 #endif 351 lp = (struct disklabel *)data; 352 353 if ((flag & FWRITE) == 0) 354 return EBADF; 355 356 error = setdisklabel(of->sc_dk.dk_label, 357 lp, /*of->sc_dk.dk_openmask */0, 358 of->sc_dk.dk_cpulabel); 359 if (error == 0 && cmd == DIOCWDINFO 360 #ifdef __HAVE_OLD_DISKLABEL 361 || xfer == ODIOCWDINFO 362 #endif 363 ) 364 error = writedisklabel(MAKEDISKDEV(major(dev), 365 DISKUNIT(dev), RAW_PART), ofdisk_strategy, 366 of->sc_dk.dk_label, of->sc_dk.dk_cpulabel); 367 368 return error; 369 } 370 371 case DIOCGDEFLABEL: 372 ofdisk_getdefaultlabel(of, (struct disklabel *)data); 373 return 0; 374 #ifdef __HAVE_OLD_DISKLABEL 375 case DIOCGDEFLABEL: 376 ofdisk_getdefaultlabel(of, &newlabel); 377 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 378 return ENOTTY; 379 memcpy(data, &newlabel, sizeof (struct olddisklabel)); 380 return 0; 381 #endif 382 383 default: 384 return ENOTTY; 385 } 386 } 387 388 int 389 ofdisk_dump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 390 { 391 return EINVAL; 392 } 393 394 int 395 ofdisk_size(dev_t dev) 396 { 397 struct ofdisk_softc *of; 398 struct disklabel *lp; 399 int size, part, omask, unit; 400 401 unit = DISKUNIT(dev); 402 if (unit >= ofdisk_cd.cd_ndevs || 403 (of = ofdisk_cd.cd_devs[unit]) == NULL) 404 return -1; 405 406 part = DISKPART(dev); 407 omask = of->sc_dk.dk_openmask & (1 << part); 408 lp = of->sc_dk.dk_label; 409 410 if (omask == 0 && ofdisk_open(dev, 0, S_IFBLK, curproc) != 0) 411 return -1; 412 413 if (lp->d_partitions[part].p_fstype != FS_SWAP) 414 size = -1; 415 else 416 size = lp->d_partitions[part].p_size * 417 (lp->d_secsize / DEV_BSIZE); 418 419 if (omask == 0 && ofdisk_close(dev, 0, S_IFBLK, curproc) != 0) 420 return -1; 421 422 return size; 423 } 424 425 void 426 ofdisk_getdefaultlabel(struct ofdisk_softc *of, struct disklabel *lp) 427 { 428 429 memset(lp, 0, sizeof *lp); 430 431 /* 432 * XXX Firmware bug? Asking for block size gives a 433 * XXX ridiculous number! So we use what the boot program 434 * XXX uses. 435 */ 436 lp->d_secsize = DEV_BSIZE; 437 438 lp->d_secperunit = OF_call_method_1("#blocks", 439 of->sc_ihandle, 0); 440 if (lp->d_secperunit == (u_int32_t)-1) 441 lp->d_secperunit = 0x7fffffff; 442 443 lp->d_secpercyl = 1; 444 lp->d_nsectors = 1; 445 lp->d_ntracks = 1; 446 lp->d_ncylinders = lp->d_secperunit; 447 448 lp->d_partitions[RAW_PART].p_offset = 0; 449 lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; 450 lp->d_npartitions = RAW_PART + 1; 451 452 lp->d_magic = DISKMAGIC; 453 lp->d_magic2 = DISKMAGIC; 454 lp->d_checksum = dkcksum(lp); 455 } 456 457 void 458 ofdisk_getdisklabel(dev) 459 dev_t dev; 460 { 461 int unit = DISKUNIT(dev); 462 struct ofdisk_softc *of = ofdisk_cd.cd_devs[unit]; 463 struct disklabel *lp = of->sc_dk.dk_label; 464 char *errmes; 465 int l; 466 467 ofdisk_getdefaultlabel(of, lp); 468 469 /* 470 * Don't read the disklabel on a floppy; simply 471 * assign all partitions the same size/offset as 472 * RAW_PART. (This is essentially what the ISA 473 * floppy driver does, but we don't deal with 474 * density stuff.) 475 */ 476 if (of->sc_flags & OFDF_ISFLOPPY) { 477 lp->d_npartitions = MAXPARTITIONS; 478 for (l = 0; l < lp->d_npartitions; l++) { 479 if (l == RAW_PART) 480 continue; 481 /* struct copy */ 482 lp->d_partitions[l] = 483 lp->d_partitions[RAW_PART]; 484 } 485 lp->d_checksum = dkcksum(lp); 486 } else { 487 errmes = readdisklabel(MAKEDISKDEV(major(dev), 488 unit, RAW_PART), ofdisk_strategy, lp, 489 of->sc_dk.dk_cpulabel); 490 if (errmes != NULL) 491 printf("%s: %s\n", of->sc_dev.dv_xname, errmes); 492 } 493 } 494