1 /* $NetBSD: sd.c,v 1.126 1998/03/03 23:15:36 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995, 1997 Charles M. Hannum. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Charles M. Hannum. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Originally written by Julian Elischer (julian@dialix.oz.au) 34 * for TRW Financial Systems for use under the MACH(2.5) operating system. 35 * 36 * TRW Financial Systems, in accordance with their agreement with Carnegie 37 * Mellon University, makes this software available to CMU to distribute 38 * or use in any manner that they see fit as long as this message is kept with 39 * the software. For this reason TFS also grants any other persons or 40 * organisations permission to use or modify this software. 41 * 42 * TFS supplies this software to be publicly redistributed 43 * on the understanding that TFS is not responsible for the correct 44 * functioning of this software in any circumstances. 45 * 46 * Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992 47 */ 48 49 #include "rnd.h" 50 51 #include <sys/types.h> 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/file.h> 56 #include <sys/stat.h> 57 #include <sys/ioctl.h> 58 #include <sys/buf.h> 59 #include <sys/uio.h> 60 #include <sys/malloc.h> 61 #include <sys/errno.h> 62 #include <sys/device.h> 63 #include <sys/disklabel.h> 64 #include <sys/disk.h> 65 #include <sys/proc.h> 66 #include <sys/conf.h> 67 #if NRND > 0 68 #include <sys/rnd.h> 69 #endif 70 71 #include <dev/scsipi/scsipi_all.h> 72 #include <dev/scsipi/scsi_all.h> 73 #include <dev/scsipi/scsipi_disk.h> 74 #include <dev/scsipi/scsi_disk.h> 75 #include <dev/scsipi/scsiconf.h> 76 #include <dev/scsipi/sdvar.h> 77 78 #include "sd.h" /* NSD_SCSIBUS and NSD_ATAPIBUS come from here */ 79 80 #ifndef SDOUTSTANDING 81 #define SDOUTSTANDING 4 82 #endif 83 84 #define SDUNIT(dev) DISKUNIT(dev) 85 #define SDPART(dev) DISKPART(dev) 86 #define MAKESDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part) 87 88 #define SDLABELDEV(dev) (MAKESDDEV(major(dev), SDUNIT(dev), RAW_PART)) 89 90 int sdlock __P((struct sd_softc *)); 91 void sdunlock __P((struct sd_softc *)); 92 void sdminphys __P((struct buf *)); 93 void sdgetdefaultlabel __P((struct sd_softc *, struct disklabel *)); 94 void sdgetdisklabel __P((struct sd_softc *)); 95 void sdstart __P((void *)); 96 void sddone __P((struct scsipi_xfer *)); 97 int sd_reassign_blocks __P((struct sd_softc *, u_long)); 98 99 extern struct cfdriver sd_cd; 100 101 struct dkdriver sddkdriver = { sdstrategy }; 102 103 struct scsipi_device sd_switch = { 104 NULL, /* Use default error handler */ 105 sdstart, /* have a queue, served by this */ 106 NULL, /* have no async handler */ 107 sddone, /* deal with stats at interrupt time */ 108 }; 109 110 /* 111 * The routine called by the low level scsi routine when it discovers 112 * a device suitable for this driver. 113 */ 114 void 115 sdattach(parent, sd, sc_link, ops) 116 struct device *parent; 117 struct sd_softc *sd; 118 struct scsipi_link *sc_link; 119 const struct sd_ops *ops; 120 { 121 int error, result; 122 struct disk_parms *dp = &sd->params; 123 124 SC_DEBUG(sc_link, SDEV_DB2, ("sdattach: ")); 125 126 /* 127 * Store information needed to contact our base driver 128 */ 129 sd->sc_link = sc_link; 130 sd->sc_ops = ops; 131 sc_link->device = &sd_switch; 132 sc_link->device_softc = sd; 133 if (sc_link->openings > SDOUTSTANDING) 134 sc_link->openings = SDOUTSTANDING; 135 136 /* 137 * Initialize and attach the disk structure. 138 */ 139 sd->sc_dk.dk_driver = &sddkdriver; 140 sd->sc_dk.dk_name = sd->sc_dev.dv_xname; 141 disk_attach(&sd->sc_dk); 142 143 #if !defined(i386) 144 dk_establish(&sd->sc_dk, &sd->sc_dev); /* XXX */ 145 #endif 146 147 /* 148 * Use the subdriver to request information regarding 149 * the drive. We cannot use interrupts yet, so the 150 * request must specify this. 151 */ 152 printf("\n"); 153 154 #if NSD_ATAPIBUS > 0 155 /* XXX BEGIN HACK ALERT!!! */ 156 if (sc_link->type == BUS_ATAPI) { 157 /* 158 * The ATAPI sense data handling is _TOTALLY_ broken. 159 * In particular, it _never_ does a REQUEST_SENSE to get 160 * sense data! This causes UNIT ATTENTION to be not 161 * cleared properly for some ATAPI devices (e.g. Zip), 162 * which messes up the probe. 163 * 164 * This is the easiest way to get around the problem. 165 * 166 * YUCK! 167 */ 168 (void)scsipi_test_unit_ready(sc_link, SCSI_AUTOCONF | 169 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE | 170 SCSI_IGNORE_NOT_READY); 171 } 172 /* XXX END HACK ALERT!!! */ 173 #endif /* NSD_ATAPIBUS > 0 */ 174 175 if ((sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 176 error = scsipi_start(sd->sc_link, SSS_START, 177 SCSI_AUTOCONF | SCSI_IGNORE_ILLEGAL_REQUEST | 178 SCSI_IGNORE_MEDIA_CHANGE | SCSI_SILENT); 179 } else 180 error = 0; 181 182 if (error) 183 result = SDGP_RESULT_OFFLINE; 184 else 185 result = (*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 186 SCSI_AUTOCONF); 187 printf("%s: ", sd->sc_dev.dv_xname); 188 switch (result) { 189 case SDGP_RESULT_OK: 190 printf("%ldMB, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %ld sectors", 191 dp->disksize / (1048576 / dp->blksize), dp->cyls, 192 dp->heads, dp->sectors, dp->blksize, dp->disksize); 193 break; 194 195 case SDGP_RESULT_OFFLINE: 196 printf("drive offline"); 197 break; 198 199 case SDGP_RESULT_UNFORMATTED: 200 printf("unformatted media"); 201 break; 202 203 #ifdef DIAGNOSTIC 204 default: 205 panic("sdattach: unknown result from get_parms"); 206 break; 207 #endif 208 } 209 printf("\n"); 210 211 #if NRND > 0 212 /* 213 * attach the device into the random source list 214 */ 215 rnd_attach_source(&sd->rnd_source, sd->sc_dev.dv_xname, RND_TYPE_DISK); 216 #endif 217 } 218 219 /* 220 * Wait interruptibly for an exclusive lock. 221 * 222 * XXX 223 * Several drivers do this; it should be abstracted and made MP-safe. 224 */ 225 int 226 sdlock(sd) 227 struct sd_softc *sd; 228 { 229 int error; 230 231 while ((sd->flags & SDF_LOCKED) != 0) { 232 sd->flags |= SDF_WANTED; 233 if ((error = tsleep(sd, PRIBIO | PCATCH, "sdlck", 0)) != 0) 234 return (error); 235 } 236 sd->flags |= SDF_LOCKED; 237 return (0); 238 } 239 240 /* 241 * Unlock and wake up any waiters. 242 */ 243 void 244 sdunlock(sd) 245 struct sd_softc *sd; 246 { 247 248 sd->flags &= ~SDF_LOCKED; 249 if ((sd->flags & SDF_WANTED) != 0) { 250 sd->flags &= ~SDF_WANTED; 251 wakeup(sd); 252 } 253 } 254 255 /* 256 * open the device. Make sure the partition info is a up-to-date as can be. 257 */ 258 int 259 sdopen(dev, flag, fmt, p) 260 dev_t dev; 261 int flag, fmt; 262 struct proc *p; 263 { 264 struct sd_softc *sd; 265 struct scsipi_link *sc_link; 266 int unit, part; 267 int error; 268 269 unit = SDUNIT(dev); 270 if (unit >= sd_cd.cd_ndevs) 271 return (ENXIO); 272 sd = sd_cd.cd_devs[unit]; 273 if (sd == NULL) 274 return (ENXIO); 275 276 sc_link = sd->sc_link; 277 278 SC_DEBUG(sc_link, SDEV_DB1, 279 ("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit, 280 sd_cd.cd_ndevs, SDPART(dev))); 281 282 if ((error = sdlock(sd)) != 0) 283 return (error); 284 285 if (sd->sc_dk.dk_openmask != 0) { 286 /* 287 * If any partition is open, but the disk has been invalidated, 288 * disallow further opens. 289 */ 290 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 291 error = EIO; 292 goto bad3; 293 } 294 } else { 295 /* Check that it is still responding and ok. */ 296 error = scsipi_test_unit_ready(sc_link, 297 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE | 298 SCSI_IGNORE_NOT_READY); 299 if (error) 300 goto bad3; 301 302 /* Start the pack spinning if necessary. */ 303 if ((sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 304 error = scsipi_start(sc_link, SSS_START, 305 SCSI_IGNORE_ILLEGAL_REQUEST | 306 SCSI_IGNORE_MEDIA_CHANGE | SCSI_SILENT); 307 if (error) 308 goto bad3; 309 } 310 311 sc_link->flags |= SDEV_OPEN; 312 313 /* Lock the pack in. */ 314 error = scsipi_prevent(sc_link, PR_PREVENT, 315 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE); 316 if (error) 317 goto bad; 318 319 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 320 sc_link->flags |= SDEV_MEDIA_LOADED; 321 322 /* 323 * Load the physical device parameters. 324 * 325 * Note that if media is present but unformatted, 326 * we allow the open (so that it can be formatted!). 327 * The drive should refuse real I/O, if the media is 328 * unformatted. 329 */ 330 if ((*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 331 0) == SDGP_RESULT_OFFLINE) { 332 error = ENXIO; 333 goto bad2; 334 } 335 SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded ")); 336 337 /* Load the partition info if not already loaded. */ 338 sdgetdisklabel(sd); 339 SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded ")); 340 } 341 } 342 343 part = SDPART(dev); 344 345 /* Check that the partition exists. */ 346 if (part != RAW_PART && 347 (part >= sd->sc_dk.dk_label->d_npartitions || 348 sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 349 error = ENXIO; 350 goto bad; 351 } 352 353 /* Insure only one open at a time. */ 354 switch (fmt) { 355 case S_IFCHR: 356 sd->sc_dk.dk_copenmask |= (1 << part); 357 break; 358 case S_IFBLK: 359 sd->sc_dk.dk_bopenmask |= (1 << part); 360 break; 361 } 362 sd->sc_dk.dk_openmask = 363 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 364 365 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 366 sdunlock(sd); 367 return (0); 368 369 bad2: 370 sc_link->flags &= ~SDEV_MEDIA_LOADED; 371 372 bad: 373 if (sd->sc_dk.dk_openmask == 0) { 374 scsipi_prevent(sc_link, PR_ALLOW, 375 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE); 376 sc_link->flags &= ~SDEV_OPEN; 377 } 378 379 bad3: 380 sdunlock(sd); 381 return (error); 382 } 383 384 /* 385 * close the device.. only called if we are the LAST occurence of an open 386 * device. Convenient now but usually a pain. 387 */ 388 int 389 sdclose(dev, flag, fmt, p) 390 dev_t dev; 391 int flag, fmt; 392 struct proc *p; 393 { 394 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 395 int part = SDPART(dev); 396 int error; 397 398 if ((error = sdlock(sd)) != 0) 399 return (error); 400 401 switch (fmt) { 402 case S_IFCHR: 403 sd->sc_dk.dk_copenmask &= ~(1 << part); 404 break; 405 case S_IFBLK: 406 sd->sc_dk.dk_bopenmask &= ~(1 << part); 407 break; 408 } 409 sd->sc_dk.dk_openmask = 410 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 411 412 if (sd->sc_dk.dk_openmask == 0) { 413 /* XXXX Must wait for I/O to complete! */ 414 415 scsipi_prevent(sd->sc_link, PR_ALLOW, 416 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 417 sd->sc_link->flags &= ~(SDEV_OPEN|SDEV_MEDIA_LOADED); 418 } 419 420 sdunlock(sd); 421 return (0); 422 } 423 424 /* 425 * Actually translate the requested transfer into one the physical driver 426 * can understand. The transfer is described by a buf and will include 427 * only one physical transfer. 428 */ 429 void 430 sdstrategy(bp) 431 struct buf *bp; 432 { 433 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 434 int s; 435 436 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy ")); 437 SC_DEBUG(sd->sc_link, SDEV_DB1, 438 ("%ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 439 /* 440 * The transfer must be a whole number of blocks. 441 */ 442 if ((bp->b_bcount % sd->sc_dk.dk_label->d_secsize) != 0) { 443 bp->b_error = EINVAL; 444 goto bad; 445 } 446 /* 447 * If the device has been made invalid, error out 448 */ 449 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 450 bp->b_error = EIO; 451 goto bad; 452 } 453 /* 454 * If it's a null transfer, return immediatly 455 */ 456 if (bp->b_bcount == 0) 457 goto done; 458 459 /* 460 * Do bounds checking, adjust transfer. if error, process. 461 * If end of partition, just return. 462 */ 463 if (SDPART(bp->b_dev) != RAW_PART && 464 bounds_check_with_label(bp, sd->sc_dk.dk_label, 465 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 466 goto done; 467 468 s = splbio(); 469 470 /* 471 * Place it in the queue of disk activities for this disk 472 */ 473 disksort(&sd->buf_queue, bp); 474 475 /* 476 * Tell the device to get going on the transfer if it's 477 * not doing anything, otherwise just wait for completion 478 */ 479 sdstart(sd); 480 481 splx(s); 482 return; 483 484 bad: 485 bp->b_flags |= B_ERROR; 486 done: 487 /* 488 * Correctly set the buf to indicate a completed xfer 489 */ 490 bp->b_resid = bp->b_bcount; 491 biodone(bp); 492 } 493 494 /* 495 * sdstart looks to see if there is a buf waiting for the device 496 * and that the device is not already busy. If both are true, 497 * It dequeues the buf and creates a scsi command to perform the 498 * transfer in the buf. The transfer request will call scsipi_done 499 * on completion, which will in turn call this routine again 500 * so that the next queued transfer is performed. 501 * The bufs are queued by the strategy routine (sdstrategy) 502 * 503 * This routine is also called after other non-queued requests 504 * have been made of the scsi driver, to ensure that the queue 505 * continues to be drained. 506 * 507 * must be called at the correct (highish) spl level 508 * sdstart() is called at splbio from sdstrategy and scsipi_done 509 */ 510 void 511 sdstart(v) 512 register void *v; 513 { 514 register struct sd_softc *sd = v; 515 register struct scsipi_link *sc_link = sd->sc_link; 516 struct disklabel *lp = sd->sc_dk.dk_label; 517 struct buf *bp = 0; 518 struct buf *dp; 519 struct scsipi_rw_big cmd_big; 520 #if NSD_SCSIBUS > 0 521 struct scsi_rw cmd_small; 522 #endif 523 struct scsipi_generic *cmdp; 524 int blkno, nblks, cmdlen, error; 525 struct partition *p; 526 527 SC_DEBUG(sc_link, SDEV_DB2, ("sdstart ")); 528 /* 529 * Check if the device has room for another command 530 */ 531 while (sc_link->openings > 0) { 532 /* 533 * there is excess capacity, but a special waits 534 * It'll need the adapter as soon as we clear out of the 535 * way and let it run (user level wait). 536 */ 537 if (sc_link->flags & SDEV_WAITING) { 538 sc_link->flags &= ~SDEV_WAITING; 539 wakeup((caddr_t)sc_link); 540 return; 541 } 542 543 /* 544 * See if there is a buf with work for us to do.. 545 */ 546 dp = &sd->buf_queue; 547 if ((bp = dp->b_actf) == NULL) /* yes, an assign */ 548 return; 549 dp->b_actf = bp->b_actf; 550 551 /* 552 * If the device has become invalid, abort all the 553 * reads and writes until all files have been closed and 554 * re-opened 555 */ 556 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 557 bp->b_error = EIO; 558 bp->b_flags |= B_ERROR; 559 bp->b_resid = bp->b_bcount; 560 biodone(bp); 561 continue; 562 } 563 564 /* 565 * We have a buf, now we should make a command 566 * 567 * First, translate the block to absolute and put it in terms 568 * of the logical blocksize of the device. 569 */ 570 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 571 if (SDPART(bp->b_dev) != RAW_PART) { 572 p = &lp->d_partitions[SDPART(bp->b_dev)]; 573 blkno += p->p_offset; 574 } 575 nblks = howmany(bp->b_bcount, lp->d_secsize); 576 577 #if NSD_SCSIBUS > 0 578 /* 579 * Fill out the scsi command. If the transfer will 580 * fit in a "small" cdb, use it. 581 */ 582 if (((blkno & 0x1fffff) == blkno) && 583 ((nblks & 0xff) == nblks) && sc_link->type == BUS_SCSI) { 584 /* 585 * We can fit in a small cdb. 586 */ 587 bzero(&cmd_small, sizeof(cmd_small)); 588 cmd_small.opcode = (bp->b_flags & B_READ) ? 589 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 590 _lto3b(blkno, cmd_small.addr); 591 cmd_small.length = nblks & 0xff; 592 cmdlen = sizeof(cmd_small); 593 cmdp = (struct scsipi_generic *)&cmd_small; 594 } else 595 #endif 596 { 597 /* 598 * Need a large cdb. 599 */ 600 bzero(&cmd_big, sizeof(cmd_big)); 601 cmd_big.opcode = (bp->b_flags & B_READ) ? 602 READ_BIG : WRITE_BIG; 603 _lto4b(blkno, cmd_big.addr); 604 _lto2b(nblks, cmd_big.length); 605 cmdlen = sizeof(cmd_big); 606 cmdp = (struct scsipi_generic *)&cmd_big; 607 } 608 609 /* Instrumentation. */ 610 disk_busy(&sd->sc_dk); 611 612 /* 613 * Call the routine that chats with the adapter. 614 * Note: we cannot sleep as we may be an interrupt 615 */ 616 error = scsipi_command(sc_link, cmdp, cmdlen, 617 (u_char *)bp->b_data, bp->b_bcount, 618 SDRETRIES, 60000, bp, SCSI_NOSLEEP | 619 ((bp->b_flags & B_READ) ? SCSI_DATA_IN : SCSI_DATA_OUT)); 620 if (error) 621 printf("%s: not queued, error %d\n", 622 sd->sc_dev.dv_xname, error); 623 } 624 } 625 626 void 627 sddone(xs) 628 struct scsipi_xfer *xs; 629 { 630 struct sd_softc *sd = xs->sc_link->device_softc; 631 632 if (xs->bp != NULL) { 633 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid); 634 #if NRND > 0 635 rnd_add_uint32(&sd->rnd_source, xs->bp->b_blkno); 636 #endif 637 } 638 } 639 640 void 641 sdminphys(bp) 642 struct buf *bp; 643 { 644 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 645 long max; 646 647 /* 648 * If the device is ancient, we want to make sure that 649 * the transfer fits into a 6-byte cdb. 650 * 651 * XXX Note that the SCSI-I spec says that 256-block transfers 652 * are allowed in a 6-byte read/write, and are specified 653 * by settng the "length" to 0. However, we're conservative 654 * here, allowing only 255-block transfers in case an 655 * ancient device gets confused by length == 0. A length of 0 656 * in a 10-byte read/write actually means 0 blocks. 657 */ 658 if (sd->flags & SDF_ANCIENT) { 659 max = sd->sc_dk.dk_label->d_secsize * 0xff; 660 661 if (bp->b_bcount > max) 662 bp->b_bcount = max; 663 } 664 665 (*sd->sc_link->adapter->scsipi_minphys)(bp); 666 } 667 668 int 669 sdread(dev, uio, ioflag) 670 dev_t dev; 671 struct uio *uio; 672 int ioflag; 673 { 674 675 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 676 } 677 678 int 679 sdwrite(dev, uio, ioflag) 680 dev_t dev; 681 struct uio *uio; 682 int ioflag; 683 { 684 685 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 686 } 687 688 /* 689 * Perform special action on behalf of the user 690 * Knows about the internals of this device 691 */ 692 int 693 sdioctl(dev, cmd, addr, flag, p) 694 dev_t dev; 695 u_long cmd; 696 caddr_t addr; 697 int flag; 698 struct proc *p; 699 { 700 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 701 int error; 702 703 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd)); 704 705 /* 706 * If the device is not valid.. abandon ship 707 */ 708 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) 709 return (EIO); 710 711 switch (cmd) { 712 case DIOCGDINFO: 713 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 714 return (0); 715 716 case DIOCGPART: 717 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 718 ((struct partinfo *)addr)->part = 719 &sd->sc_dk.dk_label->d_partitions[SDPART(dev)]; 720 return (0); 721 722 case DIOCWDINFO: 723 case DIOCSDINFO: 724 if ((flag & FWRITE) == 0) 725 return (EBADF); 726 727 if ((error = sdlock(sd)) != 0) 728 return (error); 729 sd->flags |= SDF_LABELLING; 730 731 error = setdisklabel(sd->sc_dk.dk_label, 732 (struct disklabel *)addr, /*sd->sc_dk.dk_openmask : */0, 733 sd->sc_dk.dk_cpulabel); 734 if (error == 0) { 735 if (cmd == DIOCWDINFO) 736 error = writedisklabel(SDLABELDEV(dev), 737 sdstrategy, sd->sc_dk.dk_label, 738 sd->sc_dk.dk_cpulabel); 739 } 740 741 sd->flags &= ~SDF_LABELLING; 742 sdunlock(sd); 743 return (error); 744 745 case DIOCWLABEL: 746 if ((flag & FWRITE) == 0) 747 return (EBADF); 748 if (*(int *)addr) 749 sd->flags |= SDF_WLABEL; 750 else 751 sd->flags &= ~SDF_WLABEL; 752 return (0); 753 754 case DIOCLOCK: 755 return (scsipi_prevent(sd->sc_link, 756 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 757 758 case DIOCEJECT: 759 return ((sd->sc_link->flags & SDEV_REMOVABLE) == 0 ? ENOTTY : 760 scsipi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0)); 761 762 case DIOCGDEFLABEL: 763 sdgetdefaultlabel(sd, (struct disklabel *)addr); 764 return (0); 765 766 default: 767 if (SDPART(dev) != RAW_PART) 768 return (ENOTTY); 769 return (scsipi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p)); 770 } 771 772 #ifdef DIAGNOSTIC 773 panic("sdioctl: impossible"); 774 #endif 775 } 776 777 void 778 sdgetdefaultlabel(sd, lp) 779 struct sd_softc *sd; 780 struct disklabel *lp; 781 { 782 783 bzero(lp, sizeof(struct disklabel)); 784 785 lp->d_secsize = sd->params.blksize; 786 lp->d_ntracks = sd->params.heads; 787 lp->d_nsectors = sd->params.sectors; 788 lp->d_ncylinders = sd->params.cyls; 789 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 790 791 if (sd->type == T_OPTICAL) 792 strncpy(lp->d_typename, "SCSI optical", 16); 793 else 794 strncpy(lp->d_typename, "SCSI disk", 16); 795 lp->d_type = DTYPE_SCSI; 796 strncpy(lp->d_packname, "fictitious", 16); 797 lp->d_secperunit = sd->params.disksize; 798 lp->d_rpm = sd->params.rot_rate; 799 lp->d_interleave = 1; 800 lp->d_flags = 0; 801 802 lp->d_partitions[RAW_PART].p_offset = 0; 803 lp->d_partitions[RAW_PART].p_size = 804 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 805 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 806 lp->d_npartitions = RAW_PART + 1; 807 808 lp->d_magic = DISKMAGIC; 809 lp->d_magic2 = DISKMAGIC; 810 lp->d_checksum = dkcksum(lp); 811 } 812 813 814 /* 815 * Load the label information on the named device 816 */ 817 void 818 sdgetdisklabel(sd) 819 struct sd_softc *sd; 820 { 821 struct disklabel *lp = sd->sc_dk.dk_label; 822 char *errstring; 823 824 bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel)); 825 826 sdgetdefaultlabel(sd, lp); 827 828 if (lp->d_secpercyl == 0) { 829 lp->d_secpercyl = 100; 830 /* as long as it's not 0 - readdisklabel divides by it (?) */ 831 } 832 833 /* 834 * Call the generic disklabel extraction routine 835 */ 836 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 837 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 838 if (errstring) { 839 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 840 return; 841 } 842 } 843 844 /* 845 * Tell the device to map out a defective block 846 */ 847 int 848 sd_reassign_blocks(sd, blkno) 849 struct sd_softc *sd; 850 u_long blkno; 851 { 852 struct scsi_reassign_blocks scsipi_cmd; 853 struct scsi_reassign_blocks_data rbdata; 854 855 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 856 bzero(&rbdata, sizeof(rbdata)); 857 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 858 859 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 860 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 861 862 return (scsipi_command(sd->sc_link, 863 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 864 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 865 SCSI_DATA_OUT)); 866 } 867 868 int 869 sdsize(dev) 870 dev_t dev; 871 { 872 struct sd_softc *sd; 873 int part, unit, omask; 874 int size; 875 876 unit = SDUNIT(dev); 877 if (unit >= sd_cd.cd_ndevs) 878 return (-1); 879 sd = sd_cd.cd_devs[unit]; 880 if (sd == NULL) 881 return (-1); 882 883 part = SDPART(dev); 884 omask = sd->sc_dk.dk_openmask & (1 << part); 885 886 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 887 return (-1); 888 if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 889 size = -1; 890 else 891 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 892 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 893 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 894 return (-1); 895 return (size); 896 } 897 898 #ifndef __BDEVSW_DUMP_OLD_TYPE 899 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 900 static struct scsipi_xfer sx; 901 static int sddoingadump; 902 903 /* 904 * dump all of physical memory into the partition specified, starting 905 * at offset 'dumplo' into the partition. 906 */ 907 int 908 sddump(dev, blkno, va, size) 909 dev_t dev; 910 daddr_t blkno; 911 caddr_t va; 912 size_t size; 913 { 914 struct sd_softc *sd; /* disk unit to do the I/O */ 915 struct disklabel *lp; /* disk's disklabel */ 916 int unit, part; 917 int sectorsize; /* size of a disk sector */ 918 int nsects; /* number of sectors in partition */ 919 int sectoff; /* sector offset of partition */ 920 int totwrt; /* total number of sectors left to write */ 921 int nwrt; /* current number of sectors to write */ 922 struct scsipi_rw_big cmd; /* write command */ 923 struct scsipi_xfer *xs; /* ... convenience */ 924 int retval; 925 926 /* Check if recursive dump; if so, punt. */ 927 if (sddoingadump) 928 return (EFAULT); 929 930 /* Mark as active early. */ 931 sddoingadump = 1; 932 933 unit = SDUNIT(dev); /* Decompose unit & partition. */ 934 part = SDPART(dev); 935 936 /* Check for acceptable drive number. */ 937 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 938 return (ENXIO); 939 940 /* 941 * XXX Can't do this check, since the media might have been 942 * XXX marked `invalid' by successful unmounting of all 943 * XXX filesystems. 944 */ 945 #if 0 946 /* Make sure it was initialized. */ 947 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED) 948 return (ENXIO); 949 #endif 950 951 /* Convert to disk sectors. Request must be a multiple of size. */ 952 lp = sd->sc_dk.dk_label; 953 sectorsize = lp->d_secsize; 954 if ((size % sectorsize) != 0) 955 return (EFAULT); 956 totwrt = size / sectorsize; 957 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 958 959 nsects = lp->d_partitions[part].p_size; 960 sectoff = lp->d_partitions[part].p_offset; 961 962 /* Check transfer bounds against partition size. */ 963 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 964 return (EINVAL); 965 966 /* Offset block number to start of partition. */ 967 blkno += sectoff; 968 969 xs = &sx; 970 971 while (totwrt > 0) { 972 nwrt = totwrt; /* XXX */ 973 #ifndef SD_DUMP_NOT_TRUSTED 974 /* 975 * Fill out the scsi command 976 */ 977 bzero(&cmd, sizeof(cmd)); 978 cmd.opcode = WRITE_BIG; 979 _lto4b(blkno, cmd.addr); 980 _lto2b(nwrt, cmd.length); 981 /* 982 * Fill out the scsipi_xfer structure 983 * Note: we cannot sleep as we may be an interrupt 984 * don't use scsipi_command() as it may want to wait 985 * for an xs. 986 */ 987 bzero(xs, sizeof(sx)); 988 xs->flags |= SCSI_AUTOCONF | INUSE | SCSI_DATA_OUT; 989 xs->sc_link = sd->sc_link; 990 xs->retries = SDRETRIES; 991 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 992 xs->cmd = (struct scsipi_generic *)&cmd; 993 xs->cmdlen = sizeof(cmd); 994 xs->resid = nwrt * sectorsize; 995 xs->error = XS_NOERROR; 996 xs->bp = 0; 997 xs->data = va; 998 xs->datalen = nwrt * sectorsize; 999 1000 /* 1001 * Pass all this info to the scsi driver. 1002 */ 1003 retval = scsipi_command_direct(xs); 1004 if (retval != COMPLETE) 1005 return (ENXIO); 1006 #else /* SD_DUMP_NOT_TRUSTED */ 1007 /* Let's just talk about this first... */ 1008 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1009 delay(500 * 1000); /* half a second */ 1010 #endif /* SD_DUMP_NOT_TRUSTED */ 1011 1012 /* update block count */ 1013 totwrt -= nwrt; 1014 blkno += nwrt; 1015 va += sectorsize * nwrt; 1016 } 1017 sddoingadump = 0; 1018 return (0); 1019 } 1020 #else /* __BDEVSW_DUMP_NEW_TYPE */ 1021 int 1022 sddump(dev, blkno, va, size) 1023 dev_t dev; 1024 daddr_t blkno; 1025 caddr_t va; 1026 size_t size; 1027 { 1028 1029 /* Not implemented. */ 1030 return (ENXIO); 1031 } 1032 #endif /* __BDEVSW_DUMP_NEW_TYPE */ 1033