1 /* $NetBSD: sd.c,v 1.195 2003/02/03 23:51:00 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian@dialix.oz.au) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992 54 */ 55 56 #include <sys/cdefs.h> 57 __KERNEL_RCSID(0, "$NetBSD: sd.c,v 1.195 2003/02/03 23:51:00 thorpej Exp $"); 58 59 #include "opt_scsi.h" 60 #include "opt_bufq.h" 61 #include "rnd.h" 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/file.h> 67 #include <sys/stat.h> 68 #include <sys/ioctl.h> 69 #include <sys/scsiio.h> 70 #include <sys/buf.h> 71 #include <sys/uio.h> 72 #include <sys/malloc.h> 73 #include <sys/errno.h> 74 #include <sys/device.h> 75 #include <sys/disklabel.h> 76 #include <sys/disk.h> 77 #include <sys/proc.h> 78 #include <sys/conf.h> 79 #include <sys/vnode.h> 80 #if NRND > 0 81 #include <sys/rnd.h> 82 #endif 83 84 #include <dev/scsipi/scsipi_all.h> 85 #include <dev/scsipi/scsi_all.h> 86 #include <dev/scsipi/scsipi_disk.h> 87 #include <dev/scsipi/scsi_disk.h> 88 #include <dev/scsipi/scsiconf.h> 89 #include <dev/scsipi/sdvar.h> 90 91 #include "sd.h" /* NSD_SCSIBUS and NSD_ATAPIBUS come from here */ 92 93 #define SDUNIT(dev) DISKUNIT(dev) 94 #define SDPART(dev) DISKPART(dev) 95 #define SDMINOR(unit, part) DISKMINOR(unit, part) 96 #define MAKESDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part) 97 98 #define SDLABELDEV(dev) (MAKESDDEV(major(dev), SDUNIT(dev), RAW_PART)) 99 100 int sdlock __P((struct sd_softc *)); 101 void sdunlock __P((struct sd_softc *)); 102 void sdminphys __P((struct buf *)); 103 void sdgetdefaultlabel __P((struct sd_softc *, struct disklabel *)); 104 void sdgetdisklabel __P((struct sd_softc *)); 105 void sdstart __P((struct scsipi_periph *)); 106 void sddone __P((struct scsipi_xfer *)); 107 void sd_shutdown __P((void *)); 108 int sd_reassign_blocks __P((struct sd_softc *, u_long)); 109 int sd_interpret_sense __P((struct scsipi_xfer *)); 110 111 extern struct cfdriver sd_cd; 112 113 dev_type_open(sdopen); 114 dev_type_close(sdclose); 115 dev_type_read(sdread); 116 dev_type_write(sdwrite); 117 dev_type_ioctl(sdioctl); 118 dev_type_strategy(sdstrategy); 119 dev_type_dump(sddump); 120 dev_type_size(sdsize); 121 122 const struct bdevsw sd_bdevsw = { 123 sdopen, sdclose, sdstrategy, sdioctl, sddump, sdsize, D_DISK 124 }; 125 126 const struct cdevsw sd_cdevsw = { 127 sdopen, sdclose, sdread, sdwrite, sdioctl, 128 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 129 }; 130 131 struct dkdriver sddkdriver = { sdstrategy }; 132 133 const struct scsipi_periphsw sd_switch = { 134 sd_interpret_sense, /* check our error handler first */ 135 sdstart, /* have a queue, served by this */ 136 NULL, /* have no async handler */ 137 sddone, /* deal with stats at interrupt time */ 138 }; 139 140 /* 141 * Attach routine common to atapi & scsi. 142 */ 143 void 144 sdattach(parent, sd, periph, ops) 145 struct device *parent; 146 struct sd_softc *sd; 147 struct scsipi_periph *periph; 148 const struct sd_ops *ops; 149 { 150 int error, result; 151 struct disk_parms *dp = &sd->params; 152 char pbuf[9]; 153 154 SC_DEBUG(periph, SCSIPI_DB2, ("sdattach: ")); 155 156 #ifdef NEW_BUFQ_STRATEGY 157 bufq_alloc(&sd->buf_queue, BUFQ_READ_PRIO|BUFQ_SORT_RAWBLOCK); 158 #else 159 bufq_alloc(&sd->buf_queue, BUFQ_DISKSORT|BUFQ_SORT_RAWBLOCK); 160 #endif 161 162 /* 163 * Store information needed to contact our base driver 164 */ 165 sd->sc_periph = periph; 166 sd->sc_ops = ops; 167 168 periph->periph_dev = &sd->sc_dev; 169 periph->periph_switch = &sd_switch; 170 171 /* 172 * Increase our openings to the maximum-per-periph 173 * supported by the adapter. This will either be 174 * clamped down or grown by the adapter if necessary. 175 */ 176 periph->periph_openings = 177 SCSIPI_CHAN_MAX_PERIPH(periph->periph_channel); 178 periph->periph_flags |= PERIPH_GROW_OPENINGS; 179 180 /* 181 * Initialize and attach the disk structure. 182 */ 183 sd->sc_dk.dk_driver = &sddkdriver; 184 sd->sc_dk.dk_name = sd->sc_dev.dv_xname; 185 disk_attach(&sd->sc_dk); 186 187 /* 188 * Use the subdriver to request information regarding the drive. 189 */ 190 printf("\n"); 191 192 error = scsipi_start(periph, SSS_START, 193 XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST | 194 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 195 196 if (error) 197 result = SDGP_RESULT_OFFLINE; 198 else 199 result = (*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 200 XS_CTL_DISCOVERY); 201 printf("%s: ", sd->sc_dev.dv_xname); 202 switch (result) { 203 case SDGP_RESULT_OK: 204 format_bytes(pbuf, sizeof(pbuf), 205 (u_int64_t)dp->disksize * dp->blksize); 206 printf( 207 "%s, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %lu sectors", 208 pbuf, dp->cyls, dp->heads, dp->sectors, dp->blksize, 209 dp->disksize); 210 break; 211 212 case SDGP_RESULT_OFFLINE: 213 printf("drive offline"); 214 break; 215 216 case SDGP_RESULT_UNFORMATTED: 217 printf("unformatted media"); 218 break; 219 220 #ifdef DIAGNOSTIC 221 default: 222 panic("sdattach: unknown result from get_parms"); 223 break; 224 #endif 225 } 226 printf("\n"); 227 228 /* 229 * Establish a shutdown hook so that we can ensure that 230 * our data has actually made it onto the platter at 231 * shutdown time. Note that this relies on the fact 232 * that the shutdown hook code puts us at the head of 233 * the list (thus guaranteeing that our hook runs before 234 * our ancestors'). 235 */ 236 if ((sd->sc_sdhook = 237 shutdownhook_establish(sd_shutdown, sd)) == NULL) 238 printf("%s: WARNING: unable to establish shutdown hook\n", 239 sd->sc_dev.dv_xname); 240 241 #if NRND > 0 242 /* 243 * attach the device into the random source list 244 */ 245 rnd_attach_source(&sd->rnd_source, sd->sc_dev.dv_xname, 246 RND_TYPE_DISK, 0); 247 #endif 248 } 249 250 int 251 sdactivate(self, act) 252 struct device *self; 253 enum devact act; 254 { 255 int rv = 0; 256 257 switch (act) { 258 case DVACT_ACTIVATE: 259 rv = EOPNOTSUPP; 260 break; 261 262 case DVACT_DEACTIVATE: 263 /* 264 * Nothing to do; we key off the device's DVF_ACTIVE. 265 */ 266 break; 267 } 268 return (rv); 269 } 270 271 int 272 sddetach(self, flags) 273 struct device *self; 274 int flags; 275 { 276 struct sd_softc *sd = (struct sd_softc *) self; 277 struct buf *bp; 278 int s, bmaj, cmaj, i, mn; 279 280 /* locate the major number */ 281 bmaj = bdevsw_lookup_major(&sd_bdevsw); 282 cmaj = cdevsw_lookup_major(&sd_cdevsw); 283 284 s = splbio(); 285 286 /* Kill off any queued buffers. */ 287 while ((bp = BUFQ_GET(&sd->buf_queue)) != NULL) { 288 bp->b_error = EIO; 289 bp->b_flags |= B_ERROR; 290 bp->b_resid = bp->b_bcount; 291 biodone(bp); 292 } 293 294 bufq_free(&sd->buf_queue); 295 296 /* Kill off any pending commands. */ 297 scsipi_kill_pending(sd->sc_periph); 298 299 splx(s); 300 301 /* Nuke the vnodes for any open instances */ 302 for (i = 0; i < MAXPARTITIONS; i++) { 303 mn = SDMINOR(self->dv_unit, i); 304 vdevgone(bmaj, mn, mn, VBLK); 305 vdevgone(cmaj, mn, mn, VCHR); 306 } 307 308 /* Detach from the disk list. */ 309 disk_detach(&sd->sc_dk); 310 311 /* Get rid of the shutdown hook. */ 312 shutdownhook_disestablish(sd->sc_sdhook); 313 314 #if NRND > 0 315 /* Unhook the entropy source. */ 316 rnd_detach_source(&sd->rnd_source); 317 #endif 318 319 return (0); 320 } 321 322 /* 323 * Wait interruptibly for an exclusive lock. 324 * 325 * XXX 326 * Several drivers do this; it should be abstracted and made MP-safe. 327 */ 328 int 329 sdlock(sd) 330 struct sd_softc *sd; 331 { 332 int error; 333 334 while ((sd->flags & SDF_LOCKED) != 0) { 335 sd->flags |= SDF_WANTED; 336 if ((error = tsleep(sd, PRIBIO | PCATCH, "sdlck", 0)) != 0) 337 return (error); 338 } 339 sd->flags |= SDF_LOCKED; 340 return (0); 341 } 342 343 /* 344 * Unlock and wake up any waiters. 345 */ 346 void 347 sdunlock(sd) 348 struct sd_softc *sd; 349 { 350 351 sd->flags &= ~SDF_LOCKED; 352 if ((sd->flags & SDF_WANTED) != 0) { 353 sd->flags &= ~SDF_WANTED; 354 wakeup(sd); 355 } 356 } 357 358 /* 359 * open the device. Make sure the partition info is a up-to-date as can be. 360 */ 361 int 362 sdopen(dev, flag, fmt, p) 363 dev_t dev; 364 int flag, fmt; 365 struct proc *p; 366 { 367 struct sd_softc *sd; 368 struct scsipi_periph *periph; 369 struct scsipi_adapter *adapt; 370 int unit, part; 371 int error; 372 373 unit = SDUNIT(dev); 374 if (unit >= sd_cd.cd_ndevs) 375 return (ENXIO); 376 sd = sd_cd.cd_devs[unit]; 377 if (sd == NULL) 378 return (ENXIO); 379 380 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 381 return (ENODEV); 382 383 periph = sd->sc_periph; 384 adapt = periph->periph_channel->chan_adapter; 385 part = SDPART(dev); 386 387 SC_DEBUG(periph, SCSIPI_DB1, 388 ("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit, 389 sd_cd.cd_ndevs, part)); 390 391 /* 392 * If this is the first open of this device, add a reference 393 * to the adapter. 394 */ 395 if (sd->sc_dk.dk_openmask == 0 && 396 (error = scsipi_adapter_addref(adapt)) != 0) 397 return (error); 398 399 if ((error = sdlock(sd)) != 0) 400 goto bad4; 401 402 if ((periph->periph_flags & PERIPH_OPEN) != 0) { 403 /* 404 * If any partition is open, but the disk has been invalidated, 405 * disallow further opens of non-raw partition 406 */ 407 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 && 408 (part != RAW_PART || fmt != S_IFCHR)) { 409 error = EIO; 410 goto bad3; 411 } 412 } else { 413 /* Check that it is still responding and ok. */ 414 error = scsipi_test_unit_ready(periph, 415 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE | 416 XS_CTL_IGNORE_NOT_READY); 417 if (error) 418 goto bad3; 419 420 /* 421 * Start the pack spinning if necessary. Always allow the 422 * raw parition to be opened, for raw IOCTLs. Data transfers 423 * will check for SDEV_MEDIA_LOADED. 424 */ 425 error = scsipi_start(periph, SSS_START, 426 XS_CTL_IGNORE_ILLEGAL_REQUEST | 427 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 428 if (error) { 429 if (part != RAW_PART || fmt != S_IFCHR) 430 goto bad3; 431 else 432 goto out; 433 } 434 435 periph->periph_flags |= PERIPH_OPEN; 436 437 if (periph->periph_flags & PERIPH_REMOVABLE) { 438 /* Lock the pack in. */ 439 error = scsipi_prevent(periph, PR_PREVENT, 440 XS_CTL_IGNORE_ILLEGAL_REQUEST | 441 XS_CTL_IGNORE_MEDIA_CHANGE); 442 if (error) 443 goto bad; 444 } 445 446 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 447 periph->periph_flags |= PERIPH_MEDIA_LOADED; 448 449 /* 450 * Load the physical device parameters. 451 * 452 * Note that if media is present but unformatted, 453 * we allow the open (so that it can be formatted!). 454 * The drive should refuse real I/O, if the media is 455 * unformatted. 456 */ 457 if ((*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 458 0) == SDGP_RESULT_OFFLINE) { 459 error = ENXIO; 460 goto bad2; 461 } 462 SC_DEBUG(periph, SCSIPI_DB3, ("Params loaded ")); 463 464 /* Load the partition info if not already loaded. */ 465 sdgetdisklabel(sd); 466 SC_DEBUG(periph, SCSIPI_DB3, ("Disklabel loaded ")); 467 } 468 } 469 470 /* Check that the partition exists. */ 471 if (part != RAW_PART && 472 (part >= sd->sc_dk.dk_label->d_npartitions || 473 sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 474 error = ENXIO; 475 goto bad; 476 } 477 478 out: /* Insure only one open at a time. */ 479 switch (fmt) { 480 case S_IFCHR: 481 sd->sc_dk.dk_copenmask |= (1 << part); 482 break; 483 case S_IFBLK: 484 sd->sc_dk.dk_bopenmask |= (1 << part); 485 break; 486 } 487 sd->sc_dk.dk_openmask = 488 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 489 490 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 491 sdunlock(sd); 492 return (0); 493 494 bad2: 495 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 496 497 bad: 498 if (sd->sc_dk.dk_openmask == 0) { 499 scsipi_prevent(periph, PR_ALLOW, 500 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE); 501 periph->periph_flags &= ~PERIPH_OPEN; 502 } 503 504 bad3: 505 sdunlock(sd); 506 bad4: 507 if (sd->sc_dk.dk_openmask == 0) 508 scsipi_adapter_delref(adapt); 509 return (error); 510 } 511 512 /* 513 * close the device.. only called if we are the LAST occurence of an open 514 * device. Convenient now but usually a pain. 515 */ 516 int 517 sdclose(dev, flag, fmt, p) 518 dev_t dev; 519 int flag, fmt; 520 struct proc *p; 521 { 522 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 523 struct scsipi_periph *periph = sd->sc_periph; 524 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 525 int part = SDPART(dev); 526 int error; 527 528 if ((error = sdlock(sd)) != 0) 529 return (error); 530 531 switch (fmt) { 532 case S_IFCHR: 533 sd->sc_dk.dk_copenmask &= ~(1 << part); 534 break; 535 case S_IFBLK: 536 sd->sc_dk.dk_bopenmask &= ~(1 << part); 537 break; 538 } 539 sd->sc_dk.dk_openmask = 540 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 541 542 if (sd->sc_dk.dk_openmask == 0) { 543 /* 544 * If the disk cache needs flushing, and the disk supports 545 * it, do it now. 546 */ 547 if ((sd->flags & SDF_DIRTY) != 0 && 548 sd->sc_ops->sdo_flush != NULL) { 549 if ((*sd->sc_ops->sdo_flush)(sd, 0)) { 550 printf("%s: cache synchronization failed\n", 551 sd->sc_dev.dv_xname); 552 sd->flags &= ~SDF_FLUSHING; 553 } else 554 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 555 } 556 557 if (! (periph->periph_flags & PERIPH_KEEP_LABEL)) 558 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 559 560 scsipi_wait_drain(periph); 561 562 if (periph->periph_flags & PERIPH_REMOVABLE) { 563 scsipi_prevent(periph, PR_ALLOW, 564 XS_CTL_IGNORE_ILLEGAL_REQUEST | 565 XS_CTL_IGNORE_NOT_READY); 566 } 567 periph->periph_flags &= ~PERIPH_OPEN; 568 569 scsipi_wait_drain(periph); 570 571 scsipi_adapter_delref(adapt); 572 } 573 574 sdunlock(sd); 575 return (0); 576 } 577 578 /* 579 * Actually translate the requested transfer into one the physical driver 580 * can understand. The transfer is described by a buf and will include 581 * only one physical transfer. 582 */ 583 void 584 sdstrategy(bp) 585 struct buf *bp; 586 { 587 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 588 struct scsipi_periph *periph = sd->sc_periph; 589 struct disklabel *lp; 590 daddr_t blkno; 591 int s; 592 boolean_t sector_aligned; 593 594 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdstrategy ")); 595 SC_DEBUG(sd->sc_periph, SCSIPI_DB1, 596 ("%ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 597 /* 598 * If the device has been made invalid, error out 599 */ 600 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 || 601 (sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) { 602 if (periph->periph_flags & PERIPH_OPEN) 603 bp->b_error = EIO; 604 else 605 bp->b_error = ENODEV; 606 goto bad; 607 } 608 609 lp = sd->sc_dk.dk_label; 610 611 /* 612 * The transfer must be a whole number of blocks, offset must not be 613 * negative. 614 */ 615 if (lp->d_secsize == DEV_BSIZE) { 616 sector_aligned = (bp->b_bcount & (DEV_BSIZE - 1)) == 0; 617 } else { 618 sector_aligned = (bp->b_bcount % lp->d_secsize) == 0; 619 } 620 if (!sector_aligned || bp->b_blkno < 0) { 621 bp->b_error = EINVAL; 622 goto bad; 623 } 624 /* 625 * If it's a null transfer, return immediatly 626 */ 627 if (bp->b_bcount == 0) 628 goto done; 629 630 /* 631 * Do bounds checking, adjust transfer. if error, process. 632 * If end of partition, just return. 633 */ 634 if (bounds_check_with_label(bp, lp, 635 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 636 goto done; 637 638 /* 639 * Now convert the block number to absolute and put it in 640 * terms of the device's logical block size. 641 */ 642 if (lp->d_secsize == DEV_BSIZE) 643 blkno = bp->b_blkno; 644 else if (lp->d_secsize > DEV_BSIZE) 645 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 646 else 647 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 648 649 if (SDPART(bp->b_dev) != RAW_PART) 650 blkno += lp->d_partitions[SDPART(bp->b_dev)].p_offset; 651 652 bp->b_rawblkno = blkno; 653 654 s = splbio(); 655 656 /* 657 * Place it in the queue of disk activities for this disk. 658 * 659 * XXX Only do disksort() if the current operating mode does not 660 * XXX include tagged queueing. 661 */ 662 BUFQ_PUT(&sd->buf_queue, bp); 663 664 /* 665 * Tell the device to get going on the transfer if it's 666 * not doing anything, otherwise just wait for completion 667 */ 668 sdstart(sd->sc_periph); 669 670 splx(s); 671 return; 672 673 bad: 674 bp->b_flags |= B_ERROR; 675 done: 676 /* 677 * Correctly set the buf to indicate a completed xfer 678 */ 679 bp->b_resid = bp->b_bcount; 680 biodone(bp); 681 } 682 683 /* 684 * sdstart looks to see if there is a buf waiting for the device 685 * and that the device is not already busy. If both are true, 686 * It dequeues the buf and creates a scsi command to perform the 687 * transfer in the buf. The transfer request will call scsipi_done 688 * on completion, which will in turn call this routine again 689 * so that the next queued transfer is performed. 690 * The bufs are queued by the strategy routine (sdstrategy) 691 * 692 * This routine is also called after other non-queued requests 693 * have been made of the scsi driver, to ensure that the queue 694 * continues to be drained. 695 * 696 * must be called at the correct (highish) spl level 697 * sdstart() is called at splbio from sdstrategy and scsipi_done 698 */ 699 void 700 sdstart(periph) 701 struct scsipi_periph *periph; 702 { 703 struct sd_softc *sd = (void *)periph->periph_dev; 704 struct disklabel *lp = sd->sc_dk.dk_label; 705 struct buf *bp = 0; 706 struct scsipi_rw_big cmd_big; 707 #if NSD_SCSIBUS > 0 708 struct scsi_rw cmd_small; 709 #endif 710 struct scsipi_generic *cmdp; 711 int nblks, cmdlen, error, flags; 712 713 SC_DEBUG(periph, SCSIPI_DB2, ("sdstart ")); 714 /* 715 * Check if the device has room for another command 716 */ 717 while (periph->periph_active < periph->periph_openings) { 718 /* 719 * there is excess capacity, but a special waits 720 * It'll need the adapter as soon as we clear out of the 721 * way and let it run (user level wait). 722 */ 723 if (periph->periph_flags & PERIPH_WAITING) { 724 periph->periph_flags &= ~PERIPH_WAITING; 725 wakeup((caddr_t)periph); 726 return; 727 } 728 729 /* 730 * See if there is a buf with work for us to do.. 731 */ 732 if ((bp = BUFQ_GET(&sd->buf_queue)) == NULL) 733 return; 734 735 /* 736 * If the device has become invalid, abort all the 737 * reads and writes until all files have been closed and 738 * re-opened 739 */ 740 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 741 bp->b_error = EIO; 742 bp->b_flags |= B_ERROR; 743 bp->b_resid = bp->b_bcount; 744 biodone(bp); 745 continue; 746 } 747 748 /* 749 * We have a buf, now we should make a command. 750 */ 751 752 if (lp->d_secsize == DEV_BSIZE) 753 nblks = bp->b_bcount >> DEV_BSHIFT; 754 else 755 nblks = howmany(bp->b_bcount, lp->d_secsize); 756 757 #if NSD_SCSIBUS > 0 758 /* 759 * Fill out the scsi command. If the transfer will 760 * fit in a "small" cdb, use it. 761 */ 762 if (((bp->b_rawblkno & 0x1fffff) == bp->b_rawblkno) && 763 ((nblks & 0xff) == nblks) && 764 !(periph->periph_quirks & PQUIRK_ONLYBIG) && 765 scsipi_periph_bustype(periph) == SCSIPI_BUSTYPE_SCSI) { 766 /* 767 * We can fit in a small cdb. 768 */ 769 memset(&cmd_small, 0, sizeof(cmd_small)); 770 cmd_small.opcode = (bp->b_flags & B_READ) ? 771 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 772 _lto3b(bp->b_rawblkno, cmd_small.addr); 773 cmd_small.length = nblks & 0xff; 774 cmdlen = sizeof(cmd_small); 775 cmdp = (struct scsipi_generic *)&cmd_small; 776 } else 777 #endif /* NSD_SCSIBUS > 0 */ 778 { 779 /* 780 * Need a large cdb. 781 */ 782 memset(&cmd_big, 0, sizeof(cmd_big)); 783 cmd_big.opcode = (bp->b_flags & B_READ) ? 784 READ_BIG : WRITE_BIG; 785 _lto4b(bp->b_rawblkno, cmd_big.addr); 786 _lto2b(nblks, cmd_big.length); 787 cmdlen = sizeof(cmd_big); 788 cmdp = (struct scsipi_generic *)&cmd_big; 789 } 790 791 /* Instrumentation. */ 792 disk_busy(&sd->sc_dk); 793 794 /* 795 * Mark the disk dirty so that the cache will be 796 * flushed on close. 797 */ 798 if ((bp->b_flags & B_READ) == 0) 799 sd->flags |= SDF_DIRTY; 800 801 /* 802 * Figure out what flags to use. 803 */ 804 flags = XS_CTL_NOSLEEP|XS_CTL_ASYNC|XS_CTL_SIMPLE_TAG; 805 if (bp->b_flags & B_READ) 806 flags |= XS_CTL_DATA_IN; 807 else 808 flags |= XS_CTL_DATA_OUT; 809 810 /* 811 * Call the routine that chats with the adapter. 812 * Note: we cannot sleep as we may be an interrupt 813 */ 814 error = scsipi_command(periph, cmdp, cmdlen, 815 (u_char *)bp->b_data, bp->b_bcount, 816 SDRETRIES, SD_IO_TIMEOUT, bp, flags); 817 if (error) { 818 disk_unbusy(&sd->sc_dk, 0, 0); 819 printf("%s: not queued, error %d\n", 820 sd->sc_dev.dv_xname, error); 821 } 822 } 823 } 824 825 void 826 sddone(xs) 827 struct scsipi_xfer *xs; 828 { 829 struct sd_softc *sd = (void *)xs->xs_periph->periph_dev; 830 831 if (sd->flags & SDF_FLUSHING) { 832 /* Flush completed, no longer dirty. */ 833 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 834 } 835 836 if (xs->bp != NULL) { 837 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid, 838 (xs->bp->b_flags & B_READ)); 839 #if NRND > 0 840 rnd_add_uint32(&sd->rnd_source, xs->bp->b_rawblkno); 841 #endif 842 } 843 } 844 845 void 846 sdminphys(bp) 847 struct buf *bp; 848 { 849 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 850 long max; 851 852 /* 853 * If the device is ancient, we want to make sure that 854 * the transfer fits into a 6-byte cdb. 855 * 856 * XXX Note that the SCSI-I spec says that 256-block transfers 857 * are allowed in a 6-byte read/write, and are specified 858 * by settng the "length" to 0. However, we're conservative 859 * here, allowing only 255-block transfers in case an 860 * ancient device gets confused by length == 0. A length of 0 861 * in a 10-byte read/write actually means 0 blocks. 862 */ 863 if ((sd->flags & SDF_ANCIENT) && 864 ((sd->sc_periph->periph_flags & 865 (PERIPH_REMOVABLE | PERIPH_MEDIA_LOADED)) != PERIPH_REMOVABLE)) { 866 max = sd->sc_dk.dk_label->d_secsize * 0xff; 867 868 if (bp->b_bcount > max) 869 bp->b_bcount = max; 870 } 871 872 (*sd->sc_periph->periph_channel->chan_adapter->adapt_minphys)(bp); 873 } 874 875 int 876 sdread(dev, uio, ioflag) 877 dev_t dev; 878 struct uio *uio; 879 int ioflag; 880 { 881 882 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 883 } 884 885 int 886 sdwrite(dev, uio, ioflag) 887 dev_t dev; 888 struct uio *uio; 889 int ioflag; 890 { 891 892 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 893 } 894 895 /* 896 * Perform special action on behalf of the user 897 * Knows about the internals of this device 898 */ 899 int 900 sdioctl(dev, cmd, addr, flag, p) 901 dev_t dev; 902 u_long cmd; 903 caddr_t addr; 904 int flag; 905 struct proc *p; 906 { 907 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 908 struct scsipi_periph *periph = sd->sc_periph; 909 int part = SDPART(dev); 910 int error = 0; 911 #ifdef __HAVE_OLD_DISKLABEL 912 struct disklabel *newlabel = NULL; 913 #endif 914 915 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdioctl 0x%lx ", cmd)); 916 917 /* 918 * If the device is not valid, some IOCTLs can still be 919 * handled on the raw partition. Check this here. 920 */ 921 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 922 switch (cmd) { 923 case DIOCKLABEL: 924 case DIOCWLABEL: 925 case DIOCLOCK: 926 case DIOCEJECT: 927 case ODIOCEJECT: 928 case DIOCGCACHE: 929 case DIOCSCACHE: 930 case SCIOCIDENTIFY: 931 case OSCIOCIDENTIFY: 932 case SCIOCCOMMAND: 933 case SCIOCDEBUG: 934 if (part == RAW_PART) 935 break; 936 /* FALLTHROUGH */ 937 default: 938 if ((periph->periph_flags & PERIPH_OPEN) == 0) 939 return (ENODEV); 940 else 941 return (EIO); 942 } 943 } 944 945 switch (cmd) { 946 case DIOCGDINFO: 947 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 948 return (0); 949 950 #ifdef __HAVE_OLD_DISKLABEL 951 case ODIOCGDINFO: 952 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 953 if (newlabel == NULL) 954 return EIO; 955 memcpy(newlabel, sd->sc_dk.dk_label, sizeof (*newlabel)); 956 if (newlabel->d_npartitions <= OLDMAXPARTITIONS) 957 memcpy(addr, newlabel, sizeof (struct olddisklabel)); 958 else 959 error = ENOTTY; 960 free(newlabel, M_TEMP); 961 return error; 962 #endif 963 964 case DIOCGPART: 965 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 966 ((struct partinfo *)addr)->part = 967 &sd->sc_dk.dk_label->d_partitions[part]; 968 return (0); 969 970 case DIOCWDINFO: 971 case DIOCSDINFO: 972 #ifdef __HAVE_OLD_DISKLABEL 973 case ODIOCWDINFO: 974 case ODIOCSDINFO: 975 #endif 976 { 977 struct disklabel *lp; 978 979 if ((flag & FWRITE) == 0) 980 return (EBADF); 981 982 #ifdef __HAVE_OLD_DISKLABEL 983 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 984 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 985 if (newlabel == NULL) 986 return EIO; 987 memset(newlabel, 0, sizeof newlabel); 988 memcpy(newlabel, addr, sizeof (struct olddisklabel)); 989 lp = newlabel; 990 } else 991 #endif 992 lp = (struct disklabel *)addr; 993 994 if ((error = sdlock(sd)) != 0) 995 goto bad; 996 sd->flags |= SDF_LABELLING; 997 998 error = setdisklabel(sd->sc_dk.dk_label, 999 lp, /*sd->sc_dk.dk_openmask : */0, 1000 sd->sc_dk.dk_cpulabel); 1001 if (error == 0) { 1002 if (cmd == DIOCWDINFO 1003 #ifdef __HAVE_OLD_DISKLABEL 1004 || cmd == ODIOCWDINFO 1005 #endif 1006 ) 1007 error = writedisklabel(SDLABELDEV(dev), 1008 sdstrategy, sd->sc_dk.dk_label, 1009 sd->sc_dk.dk_cpulabel); 1010 } 1011 1012 sd->flags &= ~SDF_LABELLING; 1013 sdunlock(sd); 1014 bad: 1015 #ifdef __HAVE_OLD_DISKLABEL 1016 if (newlabel != NULL) 1017 free(newlabel, M_TEMP); 1018 #endif 1019 return (error); 1020 } 1021 1022 case DIOCKLABEL: 1023 if (*(int *)addr) 1024 periph->periph_flags |= PERIPH_KEEP_LABEL; 1025 else 1026 periph->periph_flags &= ~PERIPH_KEEP_LABEL; 1027 return (0); 1028 1029 case DIOCWLABEL: 1030 if ((flag & FWRITE) == 0) 1031 return (EBADF); 1032 if (*(int *)addr) 1033 sd->flags |= SDF_WLABEL; 1034 else 1035 sd->flags &= ~SDF_WLABEL; 1036 return (0); 1037 1038 case DIOCLOCK: 1039 return (scsipi_prevent(periph, 1040 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 1041 1042 case DIOCEJECT: 1043 if ((periph->periph_flags & PERIPH_REMOVABLE) == 0) 1044 return (ENOTTY); 1045 if (*(int *)addr == 0) { 1046 /* 1047 * Don't force eject: check that we are the only 1048 * partition open. If so, unlock it. 1049 */ 1050 if ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 1051 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 1052 sd->sc_dk.dk_openmask) { 1053 error = scsipi_prevent(periph, PR_ALLOW, 1054 XS_CTL_IGNORE_NOT_READY); 1055 if (error) 1056 return (error); 1057 } else { 1058 return (EBUSY); 1059 } 1060 } 1061 /* FALLTHROUGH */ 1062 case ODIOCEJECT: 1063 return ((periph->periph_flags & PERIPH_REMOVABLE) == 0 ? 1064 ENOTTY : scsipi_start(periph, SSS_STOP|SSS_LOEJ, 0)); 1065 1066 case DIOCGDEFLABEL: 1067 sdgetdefaultlabel(sd, (struct disklabel *)addr); 1068 return (0); 1069 1070 #ifdef __HAVE_OLD_DISKLABEL 1071 case ODIOCGDEFLABEL: 1072 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 1073 if (newlabel == NULL) 1074 return EIO; 1075 sdgetdefaultlabel(sd, newlabel); 1076 if (newlabel->d_npartitions <= OLDMAXPARTITIONS) 1077 memcpy(addr, newlabel, sizeof (struct olddisklabel)); 1078 else 1079 error = ENOTTY; 1080 free(newlabel, M_TEMP); 1081 return error; 1082 #endif 1083 1084 case DIOCGCACHE: 1085 if (sd->sc_ops->sdo_getcache != NULL) 1086 return ((*sd->sc_ops->sdo_getcache)(sd, (int *) addr)); 1087 1088 /* Not supported on this device. */ 1089 *(int *) addr = 0; 1090 return (0); 1091 1092 case DIOCSCACHE: 1093 if ((flag & FWRITE) == 0) 1094 return (EBADF); 1095 if (sd->sc_ops->sdo_setcache != NULL) 1096 return ((*sd->sc_ops->sdo_setcache)(sd, *(int *) addr)); 1097 1098 /* Not supported on this device. */ 1099 return (EOPNOTSUPP); 1100 1101 case DIOCCACHESYNC: 1102 /* 1103 * XXX Do we really need to care about having a writable 1104 * file descriptor here? 1105 */ 1106 if ((flag & FWRITE) == 0) 1107 return (EBADF); 1108 if (((sd->flags & SDF_DIRTY) != 0 || *(int *)addr != 0) && 1109 sd->sc_ops->sdo_flush != NULL) { 1110 error = (*sd->sc_ops->sdo_flush)(sd, 0); 1111 if (error) 1112 sd->flags &= ~SDF_FLUSHING; 1113 else 1114 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1115 } else 1116 error = 0; 1117 return (error); 1118 1119 default: 1120 if (part != RAW_PART) 1121 return (ENOTTY); 1122 return (scsipi_do_ioctl(periph, dev, cmd, addr, flag, p)); 1123 } 1124 1125 #ifdef DIAGNOSTIC 1126 panic("sdioctl: impossible"); 1127 #endif 1128 } 1129 1130 void 1131 sdgetdefaultlabel(sd, lp) 1132 struct sd_softc *sd; 1133 struct disklabel *lp; 1134 { 1135 1136 memset(lp, 0, sizeof(struct disklabel)); 1137 1138 lp->d_secsize = sd->params.blksize; 1139 lp->d_ntracks = sd->params.heads; 1140 lp->d_nsectors = sd->params.sectors; 1141 lp->d_ncylinders = sd->params.cyls; 1142 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 1143 1144 switch (scsipi_periph_bustype(sd->sc_periph)) { 1145 #if NSD_SCSIBUS > 0 1146 case SCSIPI_BUSTYPE_SCSI: 1147 lp->d_type = DTYPE_SCSI; 1148 break; 1149 #endif 1150 #if NSD_ATAPIBUS > 0 1151 case SCSIPI_BUSTYPE_ATAPI: 1152 lp->d_type = DTYPE_ATAPI; 1153 break; 1154 #endif 1155 } 1156 strncpy(lp->d_typename, sd->name, 16); 1157 strncpy(lp->d_packname, "fictitious", 16); 1158 lp->d_secperunit = sd->params.disksize; 1159 lp->d_rpm = sd->params.rot_rate; 1160 lp->d_interleave = 1; 1161 lp->d_flags = 0; 1162 1163 lp->d_partitions[RAW_PART].p_offset = 0; 1164 lp->d_partitions[RAW_PART].p_size = 1165 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1166 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1167 lp->d_npartitions = RAW_PART + 1; 1168 1169 lp->d_magic = DISKMAGIC; 1170 lp->d_magic2 = DISKMAGIC; 1171 lp->d_checksum = dkcksum(lp); 1172 } 1173 1174 1175 /* 1176 * Load the label information on the named device 1177 */ 1178 void 1179 sdgetdisklabel(sd) 1180 struct sd_softc *sd; 1181 { 1182 struct disklabel *lp = sd->sc_dk.dk_label; 1183 char *errstring; 1184 1185 memset(sd->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel)); 1186 1187 sdgetdefaultlabel(sd, lp); 1188 1189 if (lp->d_secpercyl == 0) { 1190 lp->d_secpercyl = 100; 1191 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1192 } 1193 1194 /* 1195 * Call the generic disklabel extraction routine 1196 */ 1197 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1198 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1199 if (errstring) { 1200 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1201 return; 1202 } 1203 } 1204 1205 void 1206 sd_shutdown(arg) 1207 void *arg; 1208 { 1209 struct sd_softc *sd = arg; 1210 1211 /* 1212 * If the disk cache needs to be flushed, and the disk supports 1213 * it, flush it. We're cold at this point, so we poll for 1214 * completion. 1215 */ 1216 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1217 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1218 printf("%s: cache synchronization failed\n", 1219 sd->sc_dev.dv_xname); 1220 sd->flags &= ~SDF_FLUSHING; 1221 } else 1222 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1223 } 1224 } 1225 1226 /* 1227 * Tell the device to map out a defective block 1228 */ 1229 int 1230 sd_reassign_blocks(sd, blkno) 1231 struct sd_softc *sd; 1232 u_long blkno; 1233 { 1234 struct scsi_reassign_blocks scsipi_cmd; 1235 struct scsi_reassign_blocks_data rbdata; 1236 1237 memset(&scsipi_cmd, 0, sizeof(scsipi_cmd)); 1238 memset(&rbdata, 0, sizeof(rbdata)); 1239 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1240 1241 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1242 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1243 1244 return (scsipi_command(sd->sc_periph, 1245 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1246 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1247 XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); 1248 } 1249 1250 /* 1251 * Check Errors 1252 */ 1253 int 1254 sd_interpret_sense(xs) 1255 struct scsipi_xfer *xs; 1256 { 1257 struct scsipi_periph *periph = xs->xs_periph; 1258 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1259 struct sd_softc *sd = (void *)periph->periph_dev; 1260 int s, error, retval = EJUSTRETURN; 1261 1262 /* 1263 * If the periph is already recovering, just do the normal 1264 * error processing. 1265 */ 1266 if (periph->periph_flags & PERIPH_RECOVERING) 1267 return (retval); 1268 1269 /* 1270 * If the device is not open yet, let the generic code handle it. 1271 */ 1272 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1273 return (retval); 1274 1275 /* 1276 * If it isn't a extended or extended/deferred error, let 1277 * the generic code handle it. 1278 */ 1279 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1280 (sense->error_code & SSD_ERRCODE) != 0x71) 1281 return (retval); 1282 1283 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1284 sense->add_sense_code == 0x4) { 1285 if (sense->add_sense_code_qual == 0x01) { 1286 /* 1287 * Unit In The Process Of Becoming Ready. 1288 */ 1289 printf("%s: waiting for pack to spin up...\n", 1290 sd->sc_dev.dv_xname); 1291 if (!callout_pending(&periph->periph_callout)) 1292 scsipi_periph_freeze(periph, 1); 1293 callout_reset(&periph->periph_callout, 1294 5 * hz, scsipi_periph_timed_thaw, periph); 1295 retval = ERESTART; 1296 } else if ((sense->add_sense_code_qual == 0x2) && 1297 (periph->periph_quirks & PQUIRK_NOSTARTUNIT) == 0) { 1298 printf("%s: pack is stopped, restarting...\n", 1299 sd->sc_dev.dv_xname); 1300 s = splbio(); 1301 periph->periph_flags |= PERIPH_RECOVERING; 1302 splx(s); 1303 error = scsipi_start(periph, SSS_START, 1304 XS_CTL_URGENT|XS_CTL_HEAD_TAG| 1305 XS_CTL_THAW_PERIPH|XS_CTL_FREEZE_PERIPH); 1306 if (error) { 1307 printf("%s: unable to restart pack\n", 1308 sd->sc_dev.dv_xname); 1309 retval = error; 1310 } else 1311 retval = ERESTART; 1312 s = splbio(); 1313 periph->periph_flags &= ~PERIPH_RECOVERING; 1314 splx(s); 1315 } 1316 } 1317 return (retval); 1318 } 1319 1320 1321 int 1322 sdsize(dev) 1323 dev_t dev; 1324 { 1325 struct sd_softc *sd; 1326 int part, unit, omask; 1327 int size; 1328 1329 unit = SDUNIT(dev); 1330 if (unit >= sd_cd.cd_ndevs) 1331 return (-1); 1332 sd = sd_cd.cd_devs[unit]; 1333 if (sd == NULL) 1334 return (-1); 1335 1336 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1337 return (-1); 1338 1339 part = SDPART(dev); 1340 omask = sd->sc_dk.dk_openmask & (1 << part); 1341 1342 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1343 return (-1); 1344 if ((sd->sc_periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1345 size = -1; 1346 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1347 size = -1; 1348 else 1349 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1350 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1351 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1352 return (-1); 1353 return (size); 1354 } 1355 1356 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1357 static struct scsipi_xfer sx; 1358 static int sddoingadump; 1359 1360 /* 1361 * dump all of physical memory into the partition specified, starting 1362 * at offset 'dumplo' into the partition. 1363 */ 1364 int 1365 sddump(dev, blkno, va, size) 1366 dev_t dev; 1367 daddr_t blkno; 1368 caddr_t va; 1369 size_t size; 1370 { 1371 struct sd_softc *sd; /* disk unit to do the I/O */ 1372 struct disklabel *lp; /* disk's disklabel */ 1373 int unit, part; 1374 int sectorsize; /* size of a disk sector */ 1375 int nsects; /* number of sectors in partition */ 1376 int sectoff; /* sector offset of partition */ 1377 int totwrt; /* total number of sectors left to write */ 1378 int nwrt; /* current number of sectors to write */ 1379 struct scsipi_rw_big cmd; /* write command */ 1380 struct scsipi_xfer *xs; /* ... convenience */ 1381 struct scsipi_periph *periph; 1382 struct scsipi_channel *chan; 1383 1384 /* Check if recursive dump; if so, punt. */ 1385 if (sddoingadump) 1386 return (EFAULT); 1387 1388 /* Mark as active early. */ 1389 sddoingadump = 1; 1390 1391 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1392 part = SDPART(dev); 1393 1394 /* Check for acceptable drive number. */ 1395 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1396 return (ENXIO); 1397 1398 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1399 return (ENODEV); 1400 1401 periph = sd->sc_periph; 1402 chan = periph->periph_channel; 1403 1404 /* Make sure it was initialized. */ 1405 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1406 return (ENXIO); 1407 1408 /* Convert to disk sectors. Request must be a multiple of size. */ 1409 lp = sd->sc_dk.dk_label; 1410 sectorsize = lp->d_secsize; 1411 if ((size % sectorsize) != 0) 1412 return (EFAULT); 1413 totwrt = size / sectorsize; 1414 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1415 1416 nsects = lp->d_partitions[part].p_size; 1417 sectoff = lp->d_partitions[part].p_offset; 1418 1419 /* Check transfer bounds against partition size. */ 1420 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1421 return (EINVAL); 1422 1423 /* Offset block number to start of partition. */ 1424 blkno += sectoff; 1425 1426 xs = &sx; 1427 1428 while (totwrt > 0) { 1429 nwrt = totwrt; /* XXX */ 1430 #ifndef SD_DUMP_NOT_TRUSTED 1431 /* 1432 * Fill out the scsi command 1433 */ 1434 memset(&cmd, 0, sizeof(cmd)); 1435 cmd.opcode = WRITE_BIG; 1436 _lto4b(blkno, cmd.addr); 1437 _lto2b(nwrt, cmd.length); 1438 /* 1439 * Fill out the scsipi_xfer structure 1440 * Note: we cannot sleep as we may be an interrupt 1441 * don't use scsipi_command() as it may want to wait 1442 * for an xs. 1443 */ 1444 memset(xs, 0, sizeof(sx)); 1445 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1446 XS_CTL_DATA_OUT; 1447 xs->xs_status = 0; 1448 xs->xs_periph = periph; 1449 xs->xs_retries = SDRETRIES; 1450 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1451 xs->cmd = (struct scsipi_generic *)&cmd; 1452 xs->cmdlen = sizeof(cmd); 1453 xs->resid = nwrt * sectorsize; 1454 xs->error = XS_NOERROR; 1455 xs->bp = 0; 1456 xs->data = va; 1457 xs->datalen = nwrt * sectorsize; 1458 1459 /* 1460 * Pass all this info to the scsi driver. 1461 */ 1462 scsipi_adapter_request(chan, ADAPTER_REQ_RUN_XFER, xs); 1463 if ((xs->xs_status & XS_STS_DONE) == 0 || 1464 xs->error != XS_NOERROR) 1465 return (EIO); 1466 #else /* SD_DUMP_NOT_TRUSTED */ 1467 /* Let's just talk about this first... */ 1468 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1469 delay(500 * 1000); /* half a second */ 1470 #endif /* SD_DUMP_NOT_TRUSTED */ 1471 1472 /* update block count */ 1473 totwrt -= nwrt; 1474 blkno += nwrt; 1475 va += sectorsize * nwrt; 1476 } 1477 sddoingadump = 0; 1478 return (0); 1479 } 1480