1 /* $NetBSD: sd.c,v 1.198 2003/05/02 08:45:28 dsl 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 1.198 2003/05/02 08:45:28 dsl 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 %llu sectors", 208 pbuf, dp->cyls, dp->heads, dp->sectors, dp->blksize, 209 (unsigned long long)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 %" PRId64 "\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 (SDPART(bp->b_dev) == RAW_PART) { 635 if (bounds_check_with_mediasize(bp, DEV_BSIZE, 636 sd->params.disksize512) <= 0) 637 goto done; 638 } else { 639 if (bounds_check_with_label(bp, lp, 640 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 641 goto done; 642 } 643 644 /* 645 * Now convert the block number to absolute and put it in 646 * terms of the device's logical block size. 647 */ 648 if (lp->d_secsize == DEV_BSIZE) 649 blkno = bp->b_blkno; 650 else if (lp->d_secsize > DEV_BSIZE) 651 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 652 else 653 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 654 655 if (SDPART(bp->b_dev) != RAW_PART) 656 blkno += lp->d_partitions[SDPART(bp->b_dev)].p_offset; 657 658 bp->b_rawblkno = blkno; 659 660 s = splbio(); 661 662 /* 663 * Place it in the queue of disk activities for this disk. 664 * 665 * XXX Only do disksort() if the current operating mode does not 666 * XXX include tagged queueing. 667 */ 668 BUFQ_PUT(&sd->buf_queue, bp); 669 670 /* 671 * Tell the device to get going on the transfer if it's 672 * not doing anything, otherwise just wait for completion 673 */ 674 sdstart(sd->sc_periph); 675 676 splx(s); 677 return; 678 679 bad: 680 bp->b_flags |= B_ERROR; 681 done: 682 /* 683 * Correctly set the buf to indicate a completed xfer 684 */ 685 bp->b_resid = bp->b_bcount; 686 biodone(bp); 687 } 688 689 /* 690 * sdstart looks to see if there is a buf waiting for the device 691 * and that the device is not already busy. If both are true, 692 * It dequeues the buf and creates a scsi command to perform the 693 * transfer in the buf. The transfer request will call scsipi_done 694 * on completion, which will in turn call this routine again 695 * so that the next queued transfer is performed. 696 * The bufs are queued by the strategy routine (sdstrategy) 697 * 698 * This routine is also called after other non-queued requests 699 * have been made of the scsi driver, to ensure that the queue 700 * continues to be drained. 701 * 702 * must be called at the correct (highish) spl level 703 * sdstart() is called at splbio from sdstrategy and scsipi_done 704 */ 705 void 706 sdstart(periph) 707 struct scsipi_periph *periph; 708 { 709 struct sd_softc *sd = (void *)periph->periph_dev; 710 struct disklabel *lp = sd->sc_dk.dk_label; 711 struct buf *bp = 0; 712 struct scsipi_rw_big cmd_big; 713 #if NSD_SCSIBUS > 0 714 struct scsi_rw cmd_small; 715 #endif 716 struct scsipi_generic *cmdp; 717 int nblks, cmdlen, error, flags; 718 719 SC_DEBUG(periph, SCSIPI_DB2, ("sdstart ")); 720 /* 721 * Check if the device has room for another command 722 */ 723 while (periph->periph_active < periph->periph_openings) { 724 /* 725 * there is excess capacity, but a special waits 726 * It'll need the adapter as soon as we clear out of the 727 * way and let it run (user level wait). 728 */ 729 if (periph->periph_flags & PERIPH_WAITING) { 730 periph->periph_flags &= ~PERIPH_WAITING; 731 wakeup((caddr_t)periph); 732 return; 733 } 734 735 /* 736 * See if there is a buf with work for us to do.. 737 */ 738 if ((bp = BUFQ_GET(&sd->buf_queue)) == NULL) 739 return; 740 741 /* 742 * If the device has become invalid, abort all the 743 * reads and writes until all files have been closed and 744 * re-opened 745 */ 746 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 747 bp->b_error = EIO; 748 bp->b_flags |= B_ERROR; 749 bp->b_resid = bp->b_bcount; 750 biodone(bp); 751 continue; 752 } 753 754 /* 755 * We have a buf, now we should make a command. 756 */ 757 758 if (lp->d_secsize == DEV_BSIZE) 759 nblks = bp->b_bcount >> DEV_BSHIFT; 760 else 761 nblks = howmany(bp->b_bcount, lp->d_secsize); 762 763 #if NSD_SCSIBUS > 0 764 /* 765 * Fill out the scsi command. If the transfer will 766 * fit in a "small" cdb, use it. 767 */ 768 if (((bp->b_rawblkno & 0x1fffff) == bp->b_rawblkno) && 769 ((nblks & 0xff) == nblks) && 770 !(periph->periph_quirks & PQUIRK_ONLYBIG) && 771 scsipi_periph_bustype(periph) == SCSIPI_BUSTYPE_SCSI) { 772 /* 773 * We can fit in a small cdb. 774 */ 775 memset(&cmd_small, 0, sizeof(cmd_small)); 776 cmd_small.opcode = (bp->b_flags & B_READ) ? 777 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 778 _lto3b(bp->b_rawblkno, cmd_small.addr); 779 cmd_small.length = nblks & 0xff; 780 cmdlen = sizeof(cmd_small); 781 cmdp = (struct scsipi_generic *)&cmd_small; 782 } else 783 #endif /* NSD_SCSIBUS > 0 */ 784 { 785 /* 786 * Need a large cdb. 787 */ 788 memset(&cmd_big, 0, sizeof(cmd_big)); 789 cmd_big.opcode = (bp->b_flags & B_READ) ? 790 READ_BIG : WRITE_BIG; 791 _lto4b(bp->b_rawblkno, cmd_big.addr); 792 _lto2b(nblks, cmd_big.length); 793 cmdlen = sizeof(cmd_big); 794 cmdp = (struct scsipi_generic *)&cmd_big; 795 } 796 797 /* Instrumentation. */ 798 disk_busy(&sd->sc_dk); 799 800 /* 801 * Mark the disk dirty so that the cache will be 802 * flushed on close. 803 */ 804 if ((bp->b_flags & B_READ) == 0) 805 sd->flags |= SDF_DIRTY; 806 807 /* 808 * Figure out what flags to use. 809 */ 810 flags = XS_CTL_NOSLEEP|XS_CTL_ASYNC|XS_CTL_SIMPLE_TAG; 811 if (bp->b_flags & B_READ) 812 flags |= XS_CTL_DATA_IN; 813 else 814 flags |= XS_CTL_DATA_OUT; 815 816 /* 817 * Call the routine that chats with the adapter. 818 * Note: we cannot sleep as we may be an interrupt 819 */ 820 error = scsipi_command(periph, cmdp, cmdlen, 821 (u_char *)bp->b_data, bp->b_bcount, 822 SDRETRIES, SD_IO_TIMEOUT, bp, flags); 823 if (error) { 824 disk_unbusy(&sd->sc_dk, 0, 0); 825 printf("%s: not queued, error %d\n", 826 sd->sc_dev.dv_xname, error); 827 } 828 } 829 } 830 831 void 832 sddone(xs) 833 struct scsipi_xfer *xs; 834 { 835 struct sd_softc *sd = (void *)xs->xs_periph->periph_dev; 836 837 if (sd->flags & SDF_FLUSHING) { 838 /* Flush completed, no longer dirty. */ 839 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 840 } 841 842 if (xs->bp != NULL) { 843 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid, 844 (xs->bp->b_flags & B_READ)); 845 #if NRND > 0 846 rnd_add_uint32(&sd->rnd_source, xs->bp->b_rawblkno); 847 #endif 848 } 849 } 850 851 void 852 sdminphys(bp) 853 struct buf *bp; 854 { 855 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 856 long max; 857 858 /* 859 * If the device is ancient, we want to make sure that 860 * the transfer fits into a 6-byte cdb. 861 * 862 * XXX Note that the SCSI-I spec says that 256-block transfers 863 * are allowed in a 6-byte read/write, and are specified 864 * by settng the "length" to 0. However, we're conservative 865 * here, allowing only 255-block transfers in case an 866 * ancient device gets confused by length == 0. A length of 0 867 * in a 10-byte read/write actually means 0 blocks. 868 */ 869 if ((sd->flags & SDF_ANCIENT) && 870 ((sd->sc_periph->periph_flags & 871 (PERIPH_REMOVABLE | PERIPH_MEDIA_LOADED)) != PERIPH_REMOVABLE)) { 872 max = sd->sc_dk.dk_label->d_secsize * 0xff; 873 874 if (bp->b_bcount > max) 875 bp->b_bcount = max; 876 } 877 878 (*sd->sc_periph->periph_channel->chan_adapter->adapt_minphys)(bp); 879 } 880 881 int 882 sdread(dev, uio, ioflag) 883 dev_t dev; 884 struct uio *uio; 885 int ioflag; 886 { 887 888 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 889 } 890 891 int 892 sdwrite(dev, uio, ioflag) 893 dev_t dev; 894 struct uio *uio; 895 int ioflag; 896 { 897 898 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 899 } 900 901 /* 902 * Perform special action on behalf of the user 903 * Knows about the internals of this device 904 */ 905 int 906 sdioctl(dev, cmd, addr, flag, p) 907 dev_t dev; 908 u_long cmd; 909 caddr_t addr; 910 int flag; 911 struct proc *p; 912 { 913 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 914 struct scsipi_periph *periph = sd->sc_periph; 915 int part = SDPART(dev); 916 int error = 0; 917 #ifdef __HAVE_OLD_DISKLABEL 918 struct disklabel *newlabel = NULL; 919 #endif 920 921 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdioctl 0x%lx ", cmd)); 922 923 /* 924 * If the device is not valid, some IOCTLs can still be 925 * handled on the raw partition. Check this here. 926 */ 927 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 928 switch (cmd) { 929 case DIOCKLABEL: 930 case DIOCWLABEL: 931 case DIOCLOCK: 932 case DIOCEJECT: 933 case ODIOCEJECT: 934 case DIOCGCACHE: 935 case DIOCSCACHE: 936 case SCIOCIDENTIFY: 937 case OSCIOCIDENTIFY: 938 case SCIOCCOMMAND: 939 case SCIOCDEBUG: 940 if (part == RAW_PART) 941 break; 942 /* FALLTHROUGH */ 943 default: 944 if ((periph->periph_flags & PERIPH_OPEN) == 0) 945 return (ENODEV); 946 else 947 return (EIO); 948 } 949 } 950 951 switch (cmd) { 952 case DIOCGDINFO: 953 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 954 return (0); 955 956 #ifdef __HAVE_OLD_DISKLABEL 957 case ODIOCGDINFO: 958 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 959 if (newlabel == NULL) 960 return EIO; 961 memcpy(newlabel, sd->sc_dk.dk_label, sizeof (*newlabel)); 962 if (newlabel->d_npartitions <= OLDMAXPARTITIONS) 963 memcpy(addr, newlabel, sizeof (struct olddisklabel)); 964 else 965 error = ENOTTY; 966 free(newlabel, M_TEMP); 967 return error; 968 #endif 969 970 case DIOCGPART: 971 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 972 ((struct partinfo *)addr)->part = 973 &sd->sc_dk.dk_label->d_partitions[part]; 974 return (0); 975 976 case DIOCWDINFO: 977 case DIOCSDINFO: 978 #ifdef __HAVE_OLD_DISKLABEL 979 case ODIOCWDINFO: 980 case ODIOCSDINFO: 981 #endif 982 { 983 struct disklabel *lp; 984 985 if ((flag & FWRITE) == 0) 986 return (EBADF); 987 988 #ifdef __HAVE_OLD_DISKLABEL 989 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 990 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 991 if (newlabel == NULL) 992 return EIO; 993 memset(newlabel, 0, sizeof newlabel); 994 memcpy(newlabel, addr, sizeof (struct olddisklabel)); 995 lp = newlabel; 996 } else 997 #endif 998 lp = (struct disklabel *)addr; 999 1000 if ((error = sdlock(sd)) != 0) 1001 goto bad; 1002 sd->flags |= SDF_LABELLING; 1003 1004 error = setdisklabel(sd->sc_dk.dk_label, 1005 lp, /*sd->sc_dk.dk_openmask : */0, 1006 sd->sc_dk.dk_cpulabel); 1007 if (error == 0) { 1008 if (cmd == DIOCWDINFO 1009 #ifdef __HAVE_OLD_DISKLABEL 1010 || cmd == ODIOCWDINFO 1011 #endif 1012 ) 1013 error = writedisklabel(SDLABELDEV(dev), 1014 sdstrategy, sd->sc_dk.dk_label, 1015 sd->sc_dk.dk_cpulabel); 1016 } 1017 1018 sd->flags &= ~SDF_LABELLING; 1019 sdunlock(sd); 1020 bad: 1021 #ifdef __HAVE_OLD_DISKLABEL 1022 if (newlabel != NULL) 1023 free(newlabel, M_TEMP); 1024 #endif 1025 return (error); 1026 } 1027 1028 case DIOCKLABEL: 1029 if (*(int *)addr) 1030 periph->periph_flags |= PERIPH_KEEP_LABEL; 1031 else 1032 periph->periph_flags &= ~PERIPH_KEEP_LABEL; 1033 return (0); 1034 1035 case DIOCWLABEL: 1036 if ((flag & FWRITE) == 0) 1037 return (EBADF); 1038 if (*(int *)addr) 1039 sd->flags |= SDF_WLABEL; 1040 else 1041 sd->flags &= ~SDF_WLABEL; 1042 return (0); 1043 1044 case DIOCLOCK: 1045 return (scsipi_prevent(periph, 1046 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 1047 1048 case DIOCEJECT: 1049 if ((periph->periph_flags & PERIPH_REMOVABLE) == 0) 1050 return (ENOTTY); 1051 if (*(int *)addr == 0) { 1052 /* 1053 * Don't force eject: check that we are the only 1054 * partition open. If so, unlock it. 1055 */ 1056 if ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 1057 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 1058 sd->sc_dk.dk_openmask) { 1059 error = scsipi_prevent(periph, PR_ALLOW, 1060 XS_CTL_IGNORE_NOT_READY); 1061 if (error) 1062 return (error); 1063 } else { 1064 return (EBUSY); 1065 } 1066 } 1067 /* FALLTHROUGH */ 1068 case ODIOCEJECT: 1069 return ((periph->periph_flags & PERIPH_REMOVABLE) == 0 ? 1070 ENOTTY : scsipi_start(periph, SSS_STOP|SSS_LOEJ, 0)); 1071 1072 case DIOCGDEFLABEL: 1073 sdgetdefaultlabel(sd, (struct disklabel *)addr); 1074 return (0); 1075 1076 #ifdef __HAVE_OLD_DISKLABEL 1077 case ODIOCGDEFLABEL: 1078 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 1079 if (newlabel == NULL) 1080 return EIO; 1081 sdgetdefaultlabel(sd, newlabel); 1082 if (newlabel->d_npartitions <= OLDMAXPARTITIONS) 1083 memcpy(addr, newlabel, sizeof (struct olddisklabel)); 1084 else 1085 error = ENOTTY; 1086 free(newlabel, M_TEMP); 1087 return error; 1088 #endif 1089 1090 case DIOCGCACHE: 1091 if (sd->sc_ops->sdo_getcache != NULL) 1092 return ((*sd->sc_ops->sdo_getcache)(sd, (int *) addr)); 1093 1094 /* Not supported on this device. */ 1095 *(int *) addr = 0; 1096 return (0); 1097 1098 case DIOCSCACHE: 1099 if ((flag & FWRITE) == 0) 1100 return (EBADF); 1101 if (sd->sc_ops->sdo_setcache != NULL) 1102 return ((*sd->sc_ops->sdo_setcache)(sd, *(int *) addr)); 1103 1104 /* Not supported on this device. */ 1105 return (EOPNOTSUPP); 1106 1107 case DIOCCACHESYNC: 1108 /* 1109 * XXX Do we really need to care about having a writable 1110 * file descriptor here? 1111 */ 1112 if ((flag & FWRITE) == 0) 1113 return (EBADF); 1114 if (((sd->flags & SDF_DIRTY) != 0 || *(int *)addr != 0) && 1115 sd->sc_ops->sdo_flush != NULL) { 1116 error = (*sd->sc_ops->sdo_flush)(sd, 0); 1117 if (error) 1118 sd->flags &= ~SDF_FLUSHING; 1119 else 1120 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1121 } else 1122 error = 0; 1123 return (error); 1124 1125 default: 1126 if (part != RAW_PART) 1127 return (ENOTTY); 1128 return (scsipi_do_ioctl(periph, dev, cmd, addr, flag, p)); 1129 } 1130 1131 #ifdef DIAGNOSTIC 1132 panic("sdioctl: impossible"); 1133 #endif 1134 } 1135 1136 void 1137 sdgetdefaultlabel(sd, lp) 1138 struct sd_softc *sd; 1139 struct disklabel *lp; 1140 { 1141 1142 memset(lp, 0, sizeof(struct disklabel)); 1143 1144 lp->d_secsize = sd->params.blksize; 1145 lp->d_ntracks = sd->params.heads; 1146 lp->d_nsectors = sd->params.sectors; 1147 lp->d_ncylinders = sd->params.cyls; 1148 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 1149 1150 switch (scsipi_periph_bustype(sd->sc_periph)) { 1151 #if NSD_SCSIBUS > 0 1152 case SCSIPI_BUSTYPE_SCSI: 1153 lp->d_type = DTYPE_SCSI; 1154 break; 1155 #endif 1156 #if NSD_ATAPIBUS > 0 1157 case SCSIPI_BUSTYPE_ATAPI: 1158 lp->d_type = DTYPE_ATAPI; 1159 break; 1160 #endif 1161 } 1162 strncpy(lp->d_typename, sd->name, 16); 1163 strncpy(lp->d_packname, "fictitious", 16); 1164 lp->d_secperunit = sd->params.disksize; 1165 lp->d_rpm = sd->params.rot_rate; 1166 lp->d_interleave = 1; 1167 lp->d_flags = 0; 1168 1169 lp->d_partitions[RAW_PART].p_offset = 0; 1170 lp->d_partitions[RAW_PART].p_size = 1171 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1172 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1173 lp->d_npartitions = RAW_PART + 1; 1174 1175 lp->d_magic = DISKMAGIC; 1176 lp->d_magic2 = DISKMAGIC; 1177 lp->d_checksum = dkcksum(lp); 1178 } 1179 1180 1181 /* 1182 * Load the label information on the named device 1183 */ 1184 void 1185 sdgetdisklabel(sd) 1186 struct sd_softc *sd; 1187 { 1188 struct disklabel *lp = sd->sc_dk.dk_label; 1189 const char *errstring; 1190 1191 memset(sd->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel)); 1192 1193 sdgetdefaultlabel(sd, lp); 1194 1195 if (lp->d_secpercyl == 0) { 1196 lp->d_secpercyl = 100; 1197 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1198 } 1199 1200 /* 1201 * Call the generic disklabel extraction routine 1202 */ 1203 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1204 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1205 if (errstring) { 1206 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1207 return; 1208 } 1209 } 1210 1211 void 1212 sd_shutdown(arg) 1213 void *arg; 1214 { 1215 struct sd_softc *sd = arg; 1216 1217 /* 1218 * If the disk cache needs to be flushed, and the disk supports 1219 * it, flush it. We're cold at this point, so we poll for 1220 * completion. 1221 */ 1222 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1223 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1224 printf("%s: cache synchronization failed\n", 1225 sd->sc_dev.dv_xname); 1226 sd->flags &= ~SDF_FLUSHING; 1227 } else 1228 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1229 } 1230 } 1231 1232 /* 1233 * Tell the device to map out a defective block 1234 */ 1235 int 1236 sd_reassign_blocks(sd, blkno) 1237 struct sd_softc *sd; 1238 u_long blkno; 1239 { 1240 struct scsi_reassign_blocks scsipi_cmd; 1241 struct scsi_reassign_blocks_data rbdata; 1242 1243 memset(&scsipi_cmd, 0, sizeof(scsipi_cmd)); 1244 memset(&rbdata, 0, sizeof(rbdata)); 1245 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1246 1247 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1248 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1249 1250 return (scsipi_command(sd->sc_periph, 1251 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1252 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1253 XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); 1254 } 1255 1256 /* 1257 * Check Errors 1258 */ 1259 int 1260 sd_interpret_sense(xs) 1261 struct scsipi_xfer *xs; 1262 { 1263 struct scsipi_periph *periph = xs->xs_periph; 1264 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1265 struct sd_softc *sd = (void *)periph->periph_dev; 1266 int s, error, retval = EJUSTRETURN; 1267 1268 /* 1269 * If the periph is already recovering, just do the normal 1270 * error processing. 1271 */ 1272 if (periph->periph_flags & PERIPH_RECOVERING) 1273 return (retval); 1274 1275 /* 1276 * If the device is not open yet, let the generic code handle it. 1277 */ 1278 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1279 return (retval); 1280 1281 /* 1282 * If it isn't a extended or extended/deferred error, let 1283 * the generic code handle it. 1284 */ 1285 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1286 (sense->error_code & SSD_ERRCODE) != 0x71) 1287 return (retval); 1288 1289 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1290 sense->add_sense_code == 0x4) { 1291 if (sense->add_sense_code_qual == 0x01) { 1292 /* 1293 * Unit In The Process Of Becoming Ready. 1294 */ 1295 printf("%s: waiting for pack to spin up...\n", 1296 sd->sc_dev.dv_xname); 1297 if (!callout_pending(&periph->periph_callout)) 1298 scsipi_periph_freeze(periph, 1); 1299 callout_reset(&periph->periph_callout, 1300 5 * hz, scsipi_periph_timed_thaw, periph); 1301 retval = ERESTART; 1302 } else if ((sense->add_sense_code_qual == 0x2) && 1303 (periph->periph_quirks & PQUIRK_NOSTARTUNIT) == 0) { 1304 printf("%s: pack is stopped, restarting...\n", 1305 sd->sc_dev.dv_xname); 1306 s = splbio(); 1307 periph->periph_flags |= PERIPH_RECOVERING; 1308 splx(s); 1309 error = scsipi_start(periph, SSS_START, 1310 XS_CTL_URGENT|XS_CTL_HEAD_TAG| 1311 XS_CTL_THAW_PERIPH|XS_CTL_FREEZE_PERIPH); 1312 if (error) { 1313 printf("%s: unable to restart pack\n", 1314 sd->sc_dev.dv_xname); 1315 retval = error; 1316 } else 1317 retval = ERESTART; 1318 s = splbio(); 1319 periph->periph_flags &= ~PERIPH_RECOVERING; 1320 splx(s); 1321 } 1322 } 1323 return (retval); 1324 } 1325 1326 1327 int 1328 sdsize(dev) 1329 dev_t dev; 1330 { 1331 struct sd_softc *sd; 1332 int part, unit, omask; 1333 int size; 1334 1335 unit = SDUNIT(dev); 1336 if (unit >= sd_cd.cd_ndevs) 1337 return (-1); 1338 sd = sd_cd.cd_devs[unit]; 1339 if (sd == NULL) 1340 return (-1); 1341 1342 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1343 return (-1); 1344 1345 part = SDPART(dev); 1346 omask = sd->sc_dk.dk_openmask & (1 << part); 1347 1348 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1349 return (-1); 1350 if ((sd->sc_periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1351 size = -1; 1352 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1353 size = -1; 1354 else 1355 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1356 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1357 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1358 return (-1); 1359 return (size); 1360 } 1361 1362 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1363 static struct scsipi_xfer sx; 1364 static int sddoingadump; 1365 1366 /* 1367 * dump all of physical memory into the partition specified, starting 1368 * at offset 'dumplo' into the partition. 1369 */ 1370 int 1371 sddump(dev, blkno, va, size) 1372 dev_t dev; 1373 daddr_t blkno; 1374 caddr_t va; 1375 size_t size; 1376 { 1377 struct sd_softc *sd; /* disk unit to do the I/O */ 1378 struct disklabel *lp; /* disk's disklabel */ 1379 int unit, part; 1380 int sectorsize; /* size of a disk sector */ 1381 int nsects; /* number of sectors in partition */ 1382 int sectoff; /* sector offset of partition */ 1383 int totwrt; /* total number of sectors left to write */ 1384 int nwrt; /* current number of sectors to write */ 1385 struct scsipi_rw_big cmd; /* write command */ 1386 struct scsipi_xfer *xs; /* ... convenience */ 1387 struct scsipi_periph *periph; 1388 struct scsipi_channel *chan; 1389 1390 /* Check if recursive dump; if so, punt. */ 1391 if (sddoingadump) 1392 return (EFAULT); 1393 1394 /* Mark as active early. */ 1395 sddoingadump = 1; 1396 1397 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1398 part = SDPART(dev); 1399 1400 /* Check for acceptable drive number. */ 1401 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1402 return (ENXIO); 1403 1404 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1405 return (ENODEV); 1406 1407 periph = sd->sc_periph; 1408 chan = periph->periph_channel; 1409 1410 /* Make sure it was initialized. */ 1411 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1412 return (ENXIO); 1413 1414 /* Convert to disk sectors. Request must be a multiple of size. */ 1415 lp = sd->sc_dk.dk_label; 1416 sectorsize = lp->d_secsize; 1417 if ((size % sectorsize) != 0) 1418 return (EFAULT); 1419 totwrt = size / sectorsize; 1420 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1421 1422 nsects = lp->d_partitions[part].p_size; 1423 sectoff = lp->d_partitions[part].p_offset; 1424 1425 /* Check transfer bounds against partition size. */ 1426 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1427 return (EINVAL); 1428 1429 /* Offset block number to start of partition. */ 1430 blkno += sectoff; 1431 1432 xs = &sx; 1433 1434 while (totwrt > 0) { 1435 nwrt = totwrt; /* XXX */ 1436 #ifndef SD_DUMP_NOT_TRUSTED 1437 /* 1438 * Fill out the scsi command 1439 */ 1440 memset(&cmd, 0, sizeof(cmd)); 1441 cmd.opcode = WRITE_BIG; 1442 _lto4b(blkno, cmd.addr); 1443 _lto2b(nwrt, cmd.length); 1444 /* 1445 * Fill out the scsipi_xfer structure 1446 * Note: we cannot sleep as we may be an interrupt 1447 * don't use scsipi_command() as it may want to wait 1448 * for an xs. 1449 */ 1450 memset(xs, 0, sizeof(sx)); 1451 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1452 XS_CTL_DATA_OUT; 1453 xs->xs_status = 0; 1454 xs->xs_periph = periph; 1455 xs->xs_retries = SDRETRIES; 1456 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1457 xs->cmd = (struct scsipi_generic *)&cmd; 1458 xs->cmdlen = sizeof(cmd); 1459 xs->resid = nwrt * sectorsize; 1460 xs->error = XS_NOERROR; 1461 xs->bp = 0; 1462 xs->data = va; 1463 xs->datalen = nwrt * sectorsize; 1464 1465 /* 1466 * Pass all this info to the scsi driver. 1467 */ 1468 scsipi_adapter_request(chan, ADAPTER_REQ_RUN_XFER, xs); 1469 if ((xs->xs_status & XS_STS_DONE) == 0 || 1470 xs->error != XS_NOERROR) 1471 return (EIO); 1472 #else /* SD_DUMP_NOT_TRUSTED */ 1473 /* Let's just talk about this first... */ 1474 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1475 delay(500 * 1000); /* half a second */ 1476 #endif /* SD_DUMP_NOT_TRUSTED */ 1477 1478 /* update block count */ 1479 totwrt -= nwrt; 1480 blkno += nwrt; 1481 va += sectorsize * nwrt; 1482 } 1483 sddoingadump = 0; 1484 return (0); 1485 } 1486