1 /* $NetBSD: sd.c,v 1.202 2003/06/29 22:30:42 fvdl 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 1.202 2003/06/29 22:30:42 fvdl 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 aprint_naive("\n"); 191 aprint_normal("\n"); 192 193 error = scsipi_start(periph, SSS_START, 194 XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST | 195 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 196 197 if (error) 198 result = SDGP_RESULT_OFFLINE; 199 else 200 result = (*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 201 XS_CTL_DISCOVERY); 202 aprint_normal("%s: ", sd->sc_dev.dv_xname); 203 switch (result) { 204 case SDGP_RESULT_OK: 205 format_bytes(pbuf, sizeof(pbuf), 206 (u_int64_t)dp->disksize * dp->blksize); 207 aprint_normal( 208 "%s, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %llu sectors", 209 pbuf, dp->cyls, dp->heads, dp->sectors, dp->blksize, 210 (unsigned long long)dp->disksize); 211 break; 212 213 case SDGP_RESULT_OFFLINE: 214 aprint_normal("drive offline"); 215 break; 216 217 case SDGP_RESULT_UNFORMATTED: 218 aprint_normal("unformatted media"); 219 break; 220 221 #ifdef DIAGNOSTIC 222 default: 223 panic("sdattach: unknown result from get_parms"); 224 break; 225 #endif 226 } 227 aprint_normal("\n"); 228 229 /* 230 * Establish a shutdown hook so that we can ensure that 231 * our data has actually made it onto the platter at 232 * shutdown time. Note that this relies on the fact 233 * that the shutdown hook code puts us at the head of 234 * the list (thus guaranteeing that our hook runs before 235 * our ancestors'). 236 */ 237 if ((sd->sc_sdhook = 238 shutdownhook_establish(sd_shutdown, sd)) == NULL) 239 aprint_error("%s: WARNING: unable to establish shutdown hook\n", 240 sd->sc_dev.dv_xname); 241 242 #if NRND > 0 243 /* 244 * attach the device into the random source list 245 */ 246 rnd_attach_source(&sd->rnd_source, sd->sc_dev.dv_xname, 247 RND_TYPE_DISK, 0); 248 #endif 249 } 250 251 int 252 sdactivate(self, act) 253 struct device *self; 254 enum devact act; 255 { 256 int rv = 0; 257 258 switch (act) { 259 case DVACT_ACTIVATE: 260 rv = EOPNOTSUPP; 261 break; 262 263 case DVACT_DEACTIVATE: 264 /* 265 * Nothing to do; we key off the device's DVF_ACTIVE. 266 */ 267 break; 268 } 269 return (rv); 270 } 271 272 int 273 sddetach(self, flags) 274 struct device *self; 275 int flags; 276 { 277 struct sd_softc *sd = (struct sd_softc *) self; 278 struct buf *bp; 279 int s, bmaj, cmaj, i, mn; 280 281 /* locate the major number */ 282 bmaj = bdevsw_lookup_major(&sd_bdevsw); 283 cmaj = cdevsw_lookup_major(&sd_cdevsw); 284 285 s = splbio(); 286 287 /* Kill off any queued buffers. */ 288 while ((bp = BUFQ_GET(&sd->buf_queue)) != NULL) { 289 bp->b_error = EIO; 290 bp->b_flags |= B_ERROR; 291 bp->b_resid = bp->b_bcount; 292 biodone(bp); 293 } 294 295 bufq_free(&sd->buf_queue); 296 297 /* Kill off any pending commands. */ 298 scsipi_kill_pending(sd->sc_periph); 299 300 splx(s); 301 302 /* Nuke the vnodes for any open instances */ 303 for (i = 0; i < MAXPARTITIONS; i++) { 304 mn = SDMINOR(self->dv_unit, i); 305 vdevgone(bmaj, mn, mn, VBLK); 306 vdevgone(cmaj, mn, mn, VCHR); 307 } 308 309 /* Detach from the disk list. */ 310 disk_detach(&sd->sc_dk); 311 312 /* Get rid of the shutdown hook. */ 313 shutdownhook_disestablish(sd->sc_sdhook); 314 315 #if NRND > 0 316 /* Unhook the entropy source. */ 317 rnd_detach_source(&sd->rnd_source); 318 #endif 319 320 return (0); 321 } 322 323 /* 324 * Wait interruptibly for an exclusive lock. 325 * 326 * XXX 327 * Several drivers do this; it should be abstracted and made MP-safe. 328 */ 329 int 330 sdlock(sd) 331 struct sd_softc *sd; 332 { 333 int error; 334 335 while ((sd->flags & SDF_LOCKED) != 0) { 336 sd->flags |= SDF_WANTED; 337 if ((error = tsleep(sd, PRIBIO | PCATCH, "sdlck", 0)) != 0) 338 return (error); 339 } 340 sd->flags |= SDF_LOCKED; 341 return (0); 342 } 343 344 /* 345 * Unlock and wake up any waiters. 346 */ 347 void 348 sdunlock(sd) 349 struct sd_softc *sd; 350 { 351 352 sd->flags &= ~SDF_LOCKED; 353 if ((sd->flags & SDF_WANTED) != 0) { 354 sd->flags &= ~SDF_WANTED; 355 wakeup(sd); 356 } 357 } 358 359 /* 360 * open the device. Make sure the partition info is a up-to-date as can be. 361 */ 362 int 363 sdopen(dev, flag, fmt, p) 364 dev_t dev; 365 int flag, fmt; 366 struct proc *p; 367 { 368 struct sd_softc *sd; 369 struct scsipi_periph *periph; 370 struct scsipi_adapter *adapt; 371 int unit, part; 372 int error; 373 374 unit = SDUNIT(dev); 375 if (unit >= sd_cd.cd_ndevs) 376 return (ENXIO); 377 sd = sd_cd.cd_devs[unit]; 378 if (sd == NULL) 379 return (ENXIO); 380 381 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 382 return (ENODEV); 383 384 periph = sd->sc_periph; 385 adapt = periph->periph_channel->chan_adapter; 386 part = SDPART(dev); 387 388 SC_DEBUG(periph, SCSIPI_DB1, 389 ("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit, 390 sd_cd.cd_ndevs, part)); 391 392 /* 393 * If this is the first open of this device, add a reference 394 * to the adapter. 395 */ 396 if (sd->sc_dk.dk_openmask == 0 && 397 (error = scsipi_adapter_addref(adapt)) != 0) 398 return (error); 399 400 if ((error = sdlock(sd)) != 0) 401 goto bad4; 402 403 if ((periph->periph_flags & PERIPH_OPEN) != 0) { 404 /* 405 * If any partition is open, but the disk has been invalidated, 406 * disallow further opens of non-raw partition 407 */ 408 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 && 409 (part != RAW_PART || fmt != S_IFCHR)) { 410 error = EIO; 411 goto bad3; 412 } 413 } else { 414 /* Check that it is still responding and ok. */ 415 error = scsipi_test_unit_ready(periph, 416 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE | 417 XS_CTL_IGNORE_NOT_READY); 418 if (error) 419 goto bad3; 420 421 /* 422 * Start the pack spinning if necessary. Always allow the 423 * raw parition to be opened, for raw IOCTLs. Data transfers 424 * will check for SDEV_MEDIA_LOADED. 425 */ 426 error = scsipi_start(periph, SSS_START, 427 XS_CTL_IGNORE_ILLEGAL_REQUEST | 428 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 429 if (error) { 430 if (part != RAW_PART || fmt != S_IFCHR) 431 goto bad3; 432 else 433 goto out; 434 } 435 436 periph->periph_flags |= PERIPH_OPEN; 437 438 if (periph->periph_flags & PERIPH_REMOVABLE) { 439 /* Lock the pack in. */ 440 error = scsipi_prevent(periph, PR_PREVENT, 441 XS_CTL_IGNORE_ILLEGAL_REQUEST | 442 XS_CTL_IGNORE_MEDIA_CHANGE); 443 if (error) 444 goto bad; 445 } 446 447 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 448 periph->periph_flags |= PERIPH_MEDIA_LOADED; 449 450 /* 451 * Load the physical device parameters. 452 * 453 * Note that if media is present but unformatted, 454 * we allow the open (so that it can be formatted!). 455 * The drive should refuse real I/O, if the media is 456 * unformatted. 457 */ 458 if ((*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 459 0) == SDGP_RESULT_OFFLINE) { 460 error = ENXIO; 461 goto bad2; 462 } 463 SC_DEBUG(periph, SCSIPI_DB3, ("Params loaded ")); 464 465 /* Load the partition info if not already loaded. */ 466 sdgetdisklabel(sd); 467 SC_DEBUG(periph, SCSIPI_DB3, ("Disklabel loaded ")); 468 } 469 } 470 471 /* Check that the partition exists. */ 472 if (part != RAW_PART && 473 (part >= sd->sc_dk.dk_label->d_npartitions || 474 sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 475 error = ENXIO; 476 goto bad; 477 } 478 479 out: /* Insure only one open at a time. */ 480 switch (fmt) { 481 case S_IFCHR: 482 sd->sc_dk.dk_copenmask |= (1 << part); 483 break; 484 case S_IFBLK: 485 sd->sc_dk.dk_bopenmask |= (1 << part); 486 break; 487 } 488 sd->sc_dk.dk_openmask = 489 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 490 491 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 492 sdunlock(sd); 493 return (0); 494 495 bad2: 496 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 497 498 bad: 499 if (sd->sc_dk.dk_openmask == 0) { 500 scsipi_prevent(periph, PR_ALLOW, 501 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE); 502 periph->periph_flags &= ~PERIPH_OPEN; 503 } 504 505 bad3: 506 sdunlock(sd); 507 bad4: 508 if (sd->sc_dk.dk_openmask == 0) 509 scsipi_adapter_delref(adapt); 510 return (error); 511 } 512 513 /* 514 * close the device.. only called if we are the LAST occurence of an open 515 * device. Convenient now but usually a pain. 516 */ 517 int 518 sdclose(dev, flag, fmt, p) 519 dev_t dev; 520 int flag, fmt; 521 struct proc *p; 522 { 523 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 524 struct scsipi_periph *periph = sd->sc_periph; 525 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 526 int part = SDPART(dev); 527 int error; 528 529 if ((error = sdlock(sd)) != 0) 530 return (error); 531 532 switch (fmt) { 533 case S_IFCHR: 534 sd->sc_dk.dk_copenmask &= ~(1 << part); 535 break; 536 case S_IFBLK: 537 sd->sc_dk.dk_bopenmask &= ~(1 << part); 538 break; 539 } 540 sd->sc_dk.dk_openmask = 541 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 542 543 if (sd->sc_dk.dk_openmask == 0) { 544 /* 545 * If the disk cache needs flushing, and the disk supports 546 * it, do it now. 547 */ 548 if ((sd->flags & SDF_DIRTY) != 0 && 549 sd->sc_ops->sdo_flush != NULL) { 550 if ((*sd->sc_ops->sdo_flush)(sd, 0)) { 551 printf("%s: cache synchronization failed\n", 552 sd->sc_dev.dv_xname); 553 sd->flags &= ~SDF_FLUSHING; 554 } else 555 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 556 } 557 558 if (! (periph->periph_flags & PERIPH_KEEP_LABEL)) 559 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 560 561 scsipi_wait_drain(periph); 562 563 if (periph->periph_flags & PERIPH_REMOVABLE) { 564 scsipi_prevent(periph, PR_ALLOW, 565 XS_CTL_IGNORE_ILLEGAL_REQUEST | 566 XS_CTL_IGNORE_NOT_READY); 567 } 568 periph->periph_flags &= ~PERIPH_OPEN; 569 570 scsipi_wait_drain(periph); 571 572 scsipi_adapter_delref(adapt); 573 } 574 575 sdunlock(sd); 576 return (0); 577 } 578 579 /* 580 * Actually translate the requested transfer into one the physical driver 581 * can understand. The transfer is described by a buf and will include 582 * only one physical transfer. 583 */ 584 void 585 sdstrategy(bp) 586 struct buf *bp; 587 { 588 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 589 struct scsipi_periph *periph = sd->sc_periph; 590 struct disklabel *lp; 591 daddr_t blkno; 592 int s; 593 boolean_t sector_aligned; 594 595 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdstrategy ")); 596 SC_DEBUG(sd->sc_periph, SCSIPI_DB1, 597 ("%ld bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 598 /* 599 * If the device has been made invalid, error out 600 */ 601 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 || 602 (sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) { 603 if (periph->periph_flags & PERIPH_OPEN) 604 bp->b_error = EIO; 605 else 606 bp->b_error = ENODEV; 607 goto bad; 608 } 609 610 lp = sd->sc_dk.dk_label; 611 612 /* 613 * The transfer must be a whole number of blocks, offset must not be 614 * negative. 615 */ 616 if (lp->d_secsize == DEV_BSIZE) { 617 sector_aligned = (bp->b_bcount & (DEV_BSIZE - 1)) == 0; 618 } else { 619 sector_aligned = (bp->b_bcount % lp->d_secsize) == 0; 620 } 621 if (!sector_aligned || bp->b_blkno < 0) { 622 bp->b_error = EINVAL; 623 goto bad; 624 } 625 /* 626 * If it's a null transfer, return immediatly 627 */ 628 if (bp->b_bcount == 0) 629 goto done; 630 631 /* 632 * Do bounds checking, adjust transfer. if error, process. 633 * If end of partition, just return. 634 */ 635 if (SDPART(bp->b_dev) == RAW_PART) { 636 if (bounds_check_with_mediasize(bp, DEV_BSIZE, 637 sd->params.disksize512) <= 0) 638 goto done; 639 } else { 640 if (bounds_check_with_label(&sd->sc_dk, bp, 641 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 642 goto done; 643 } 644 645 /* 646 * Now convert the block number to absolute and put it in 647 * terms of the device's logical block size. 648 */ 649 if (lp->d_secsize == DEV_BSIZE) 650 blkno = bp->b_blkno; 651 else if (lp->d_secsize > DEV_BSIZE) 652 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 653 else 654 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 655 656 if (SDPART(bp->b_dev) != RAW_PART) 657 blkno += lp->d_partitions[SDPART(bp->b_dev)].p_offset; 658 659 bp->b_rawblkno = blkno; 660 661 s = splbio(); 662 663 /* 664 * Place it in the queue of disk activities for this disk. 665 * 666 * XXX Only do disksort() if the current operating mode does not 667 * XXX include tagged queueing. 668 */ 669 BUFQ_PUT(&sd->buf_queue, bp); 670 671 /* 672 * Tell the device to get going on the transfer if it's 673 * not doing anything, otherwise just wait for completion 674 */ 675 sdstart(sd->sc_periph); 676 677 splx(s); 678 return; 679 680 bad: 681 bp->b_flags |= B_ERROR; 682 done: 683 /* 684 * Correctly set the buf to indicate a completed xfer 685 */ 686 bp->b_resid = bp->b_bcount; 687 biodone(bp); 688 } 689 690 /* 691 * sdstart looks to see if there is a buf waiting for the device 692 * and that the device is not already busy. If both are true, 693 * It dequeues the buf and creates a scsi command to perform the 694 * transfer in the buf. The transfer request will call scsipi_done 695 * on completion, which will in turn call this routine again 696 * so that the next queued transfer is performed. 697 * The bufs are queued by the strategy routine (sdstrategy) 698 * 699 * This routine is also called after other non-queued requests 700 * have been made of the scsi driver, to ensure that the queue 701 * continues to be drained. 702 * 703 * must be called at the correct (highish) spl level 704 * sdstart() is called at splbio from sdstrategy and scsipi_done 705 */ 706 void 707 sdstart(periph) 708 struct scsipi_periph *periph; 709 { 710 struct sd_softc *sd = (void *)periph->periph_dev; 711 struct disklabel *lp = sd->sc_dk.dk_label; 712 struct buf *bp = 0; 713 struct scsipi_rw_big cmd_big; 714 #if NSD_SCSIBUS > 0 715 struct scsi_rw cmd_small; 716 #endif 717 struct scsipi_generic *cmdp; 718 int nblks, cmdlen, error, flags; 719 720 SC_DEBUG(periph, SCSIPI_DB2, ("sdstart ")); 721 /* 722 * Check if the device has room for another command 723 */ 724 while (periph->periph_active < periph->periph_openings) { 725 /* 726 * there is excess capacity, but a special waits 727 * It'll need the adapter as soon as we clear out of the 728 * way and let it run (user level wait). 729 */ 730 if (periph->periph_flags & PERIPH_WAITING) { 731 periph->periph_flags &= ~PERIPH_WAITING; 732 wakeup((caddr_t)periph); 733 return; 734 } 735 736 /* 737 * See if there is a buf with work for us to do.. 738 */ 739 if ((bp = BUFQ_GET(&sd->buf_queue)) == NULL) 740 return; 741 742 /* 743 * If the device has become invalid, abort all the 744 * reads and writes until all files have been closed and 745 * re-opened 746 */ 747 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 748 bp->b_error = EIO; 749 bp->b_flags |= B_ERROR; 750 bp->b_resid = bp->b_bcount; 751 biodone(bp); 752 continue; 753 } 754 755 /* 756 * We have a buf, now we should make a command. 757 */ 758 759 if (lp->d_secsize == DEV_BSIZE) 760 nblks = bp->b_bcount >> DEV_BSHIFT; 761 else 762 nblks = howmany(bp->b_bcount, lp->d_secsize); 763 764 #if NSD_SCSIBUS > 0 765 /* 766 * Fill out the scsi command. If the transfer will 767 * fit in a "small" cdb, use it. 768 */ 769 if (((bp->b_rawblkno & 0x1fffff) == bp->b_rawblkno) && 770 ((nblks & 0xff) == nblks) && 771 !(periph->periph_quirks & PQUIRK_ONLYBIG) && 772 scsipi_periph_bustype(periph) == SCSIPI_BUSTYPE_SCSI) { 773 /* 774 * We can fit in a small cdb. 775 */ 776 memset(&cmd_small, 0, sizeof(cmd_small)); 777 cmd_small.opcode = (bp->b_flags & B_READ) ? 778 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 779 _lto3b(bp->b_rawblkno, cmd_small.addr); 780 cmd_small.length = nblks & 0xff; 781 cmdlen = sizeof(cmd_small); 782 cmdp = (struct scsipi_generic *)&cmd_small; 783 } else 784 #endif /* NSD_SCSIBUS > 0 */ 785 { 786 /* 787 * Need a large cdb. 788 */ 789 memset(&cmd_big, 0, sizeof(cmd_big)); 790 cmd_big.opcode = (bp->b_flags & B_READ) ? 791 READ_BIG : WRITE_BIG; 792 _lto4b(bp->b_rawblkno, cmd_big.addr); 793 _lto2b(nblks, cmd_big.length); 794 cmdlen = sizeof(cmd_big); 795 cmdp = (struct scsipi_generic *)&cmd_big; 796 } 797 798 /* Instrumentation. */ 799 disk_busy(&sd->sc_dk); 800 801 /* 802 * Mark the disk dirty so that the cache will be 803 * flushed on close. 804 */ 805 if ((bp->b_flags & B_READ) == 0) 806 sd->flags |= SDF_DIRTY; 807 808 /* 809 * Figure out what flags to use. 810 */ 811 flags = XS_CTL_NOSLEEP|XS_CTL_ASYNC|XS_CTL_SIMPLE_TAG; 812 if (bp->b_flags & B_READ) 813 flags |= XS_CTL_DATA_IN; 814 else 815 flags |= XS_CTL_DATA_OUT; 816 817 /* 818 * Call the routine that chats with the adapter. 819 * Note: we cannot sleep as we may be an interrupt 820 */ 821 error = scsipi_command(periph, cmdp, cmdlen, 822 (u_char *)bp->b_data, bp->b_bcount, 823 SDRETRIES, SD_IO_TIMEOUT, bp, flags); 824 if (error) { 825 disk_unbusy(&sd->sc_dk, 0, 0); 826 printf("%s: not queued, error %d\n", 827 sd->sc_dev.dv_xname, error); 828 } 829 } 830 } 831 832 void 833 sddone(xs) 834 struct scsipi_xfer *xs; 835 { 836 struct sd_softc *sd = (void *)xs->xs_periph->periph_dev; 837 838 if (sd->flags & SDF_FLUSHING) { 839 /* Flush completed, no longer dirty. */ 840 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 841 } 842 843 if (xs->bp != NULL) { 844 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid, 845 (xs->bp->b_flags & B_READ)); 846 #if NRND > 0 847 rnd_add_uint32(&sd->rnd_source, xs->bp->b_rawblkno); 848 #endif 849 } 850 } 851 852 void 853 sdminphys(bp) 854 struct buf *bp; 855 { 856 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 857 long max; 858 859 /* 860 * If the device is ancient, we want to make sure that 861 * the transfer fits into a 6-byte cdb. 862 * 863 * XXX Note that the SCSI-I spec says that 256-block transfers 864 * are allowed in a 6-byte read/write, and are specified 865 * by settng the "length" to 0. However, we're conservative 866 * here, allowing only 255-block transfers in case an 867 * ancient device gets confused by length == 0. A length of 0 868 * in a 10-byte read/write actually means 0 blocks. 869 */ 870 if ((sd->flags & SDF_ANCIENT) && 871 ((sd->sc_periph->periph_flags & 872 (PERIPH_REMOVABLE | PERIPH_MEDIA_LOADED)) != PERIPH_REMOVABLE)) { 873 max = sd->sc_dk.dk_label->d_secsize * 0xff; 874 875 if (bp->b_bcount > max) 876 bp->b_bcount = max; 877 } 878 879 (*sd->sc_periph->periph_channel->chan_adapter->adapt_minphys)(bp); 880 } 881 882 int 883 sdread(dev, uio, ioflag) 884 dev_t dev; 885 struct uio *uio; 886 int ioflag; 887 { 888 889 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 890 } 891 892 int 893 sdwrite(dev, uio, ioflag) 894 dev_t dev; 895 struct uio *uio; 896 int ioflag; 897 { 898 899 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 900 } 901 902 /* 903 * Perform special action on behalf of the user 904 * Knows about the internals of this device 905 */ 906 int 907 sdioctl(dev, cmd, addr, flag, p) 908 dev_t dev; 909 u_long cmd; 910 caddr_t addr; 911 int flag; 912 struct proc *p; 913 { 914 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 915 struct scsipi_periph *periph = sd->sc_periph; 916 int part = SDPART(dev); 917 int error = 0; 918 #ifdef __HAVE_OLD_DISKLABEL 919 struct disklabel *newlabel = NULL; 920 #endif 921 922 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdioctl 0x%lx ", cmd)); 923 924 /* 925 * If the device is not valid, some IOCTLs can still be 926 * handled on the raw partition. Check this here. 927 */ 928 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 929 switch (cmd) { 930 case DIOCKLABEL: 931 case DIOCWLABEL: 932 case DIOCLOCK: 933 case DIOCEJECT: 934 case ODIOCEJECT: 935 case DIOCGCACHE: 936 case DIOCSCACHE: 937 case SCIOCIDENTIFY: 938 case OSCIOCIDENTIFY: 939 case SCIOCCOMMAND: 940 case SCIOCDEBUG: 941 if (part == RAW_PART) 942 break; 943 /* FALLTHROUGH */ 944 default: 945 if ((periph->periph_flags & PERIPH_OPEN) == 0) 946 return (ENODEV); 947 else 948 return (EIO); 949 } 950 } 951 952 switch (cmd) { 953 case DIOCGDINFO: 954 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 955 return (0); 956 957 #ifdef __HAVE_OLD_DISKLABEL 958 case ODIOCGDINFO: 959 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 960 if (newlabel == NULL) 961 return EIO; 962 memcpy(newlabel, sd->sc_dk.dk_label, sizeof (*newlabel)); 963 if (newlabel->d_npartitions <= OLDMAXPARTITIONS) 964 memcpy(addr, newlabel, sizeof (struct olddisklabel)); 965 else 966 error = ENOTTY; 967 free(newlabel, M_TEMP); 968 return error; 969 #endif 970 971 case DIOCGPART: 972 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 973 ((struct partinfo *)addr)->part = 974 &sd->sc_dk.dk_label->d_partitions[part]; 975 return (0); 976 977 case DIOCWDINFO: 978 case DIOCSDINFO: 979 #ifdef __HAVE_OLD_DISKLABEL 980 case ODIOCWDINFO: 981 case ODIOCSDINFO: 982 #endif 983 { 984 struct disklabel *lp; 985 986 if ((flag & FWRITE) == 0) 987 return (EBADF); 988 989 #ifdef __HAVE_OLD_DISKLABEL 990 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 991 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 992 if (newlabel == NULL) 993 return EIO; 994 memset(newlabel, 0, sizeof newlabel); 995 memcpy(newlabel, addr, sizeof (struct olddisklabel)); 996 lp = newlabel; 997 } else 998 #endif 999 lp = (struct disklabel *)addr; 1000 1001 if ((error = sdlock(sd)) != 0) 1002 goto bad; 1003 sd->flags |= SDF_LABELLING; 1004 1005 error = setdisklabel(sd->sc_dk.dk_label, 1006 lp, /*sd->sc_dk.dk_openmask : */0, 1007 sd->sc_dk.dk_cpulabel); 1008 if (error == 0) { 1009 if (cmd == DIOCWDINFO 1010 #ifdef __HAVE_OLD_DISKLABEL 1011 || cmd == ODIOCWDINFO 1012 #endif 1013 ) 1014 error = writedisklabel(SDLABELDEV(dev), 1015 sdstrategy, sd->sc_dk.dk_label, 1016 sd->sc_dk.dk_cpulabel); 1017 } 1018 1019 sd->flags &= ~SDF_LABELLING; 1020 sdunlock(sd); 1021 bad: 1022 #ifdef __HAVE_OLD_DISKLABEL 1023 if (newlabel != NULL) 1024 free(newlabel, M_TEMP); 1025 #endif 1026 return (error); 1027 } 1028 1029 case DIOCKLABEL: 1030 if (*(int *)addr) 1031 periph->periph_flags |= PERIPH_KEEP_LABEL; 1032 else 1033 periph->periph_flags &= ~PERIPH_KEEP_LABEL; 1034 return (0); 1035 1036 case DIOCWLABEL: 1037 if ((flag & FWRITE) == 0) 1038 return (EBADF); 1039 if (*(int *)addr) 1040 sd->flags |= SDF_WLABEL; 1041 else 1042 sd->flags &= ~SDF_WLABEL; 1043 return (0); 1044 1045 case DIOCLOCK: 1046 return (scsipi_prevent(periph, 1047 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 1048 1049 case DIOCEJECT: 1050 if ((periph->periph_flags & PERIPH_REMOVABLE) == 0) 1051 return (ENOTTY); 1052 if (*(int *)addr == 0) { 1053 /* 1054 * Don't force eject: check that we are the only 1055 * partition open. If so, unlock it. 1056 */ 1057 if ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 1058 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 1059 sd->sc_dk.dk_openmask) { 1060 error = scsipi_prevent(periph, PR_ALLOW, 1061 XS_CTL_IGNORE_NOT_READY); 1062 if (error) 1063 return (error); 1064 } else { 1065 return (EBUSY); 1066 } 1067 } 1068 /* FALLTHROUGH */ 1069 case ODIOCEJECT: 1070 return ((periph->periph_flags & PERIPH_REMOVABLE) == 0 ? 1071 ENOTTY : scsipi_start(periph, SSS_STOP|SSS_LOEJ, 0)); 1072 1073 case DIOCGDEFLABEL: 1074 sdgetdefaultlabel(sd, (struct disklabel *)addr); 1075 return (0); 1076 1077 #ifdef __HAVE_OLD_DISKLABEL 1078 case ODIOCGDEFLABEL: 1079 newlabel = malloc(sizeof *newlabel, M_TEMP, M_WAITOK); 1080 if (newlabel == NULL) 1081 return EIO; 1082 sdgetdefaultlabel(sd, newlabel); 1083 if (newlabel->d_npartitions <= OLDMAXPARTITIONS) 1084 memcpy(addr, newlabel, sizeof (struct olddisklabel)); 1085 else 1086 error = ENOTTY; 1087 free(newlabel, M_TEMP); 1088 return error; 1089 #endif 1090 1091 case DIOCGCACHE: 1092 if (sd->sc_ops->sdo_getcache != NULL) 1093 return ((*sd->sc_ops->sdo_getcache)(sd, (int *) addr)); 1094 1095 /* Not supported on this device. */ 1096 *(int *) addr = 0; 1097 return (0); 1098 1099 case DIOCSCACHE: 1100 if ((flag & FWRITE) == 0) 1101 return (EBADF); 1102 if (sd->sc_ops->sdo_setcache != NULL) 1103 return ((*sd->sc_ops->sdo_setcache)(sd, *(int *) addr)); 1104 1105 /* Not supported on this device. */ 1106 return (EOPNOTSUPP); 1107 1108 case DIOCCACHESYNC: 1109 /* 1110 * XXX Do we really need to care about having a writable 1111 * file descriptor here? 1112 */ 1113 if ((flag & FWRITE) == 0) 1114 return (EBADF); 1115 if (((sd->flags & SDF_DIRTY) != 0 || *(int *)addr != 0) && 1116 sd->sc_ops->sdo_flush != NULL) { 1117 error = (*sd->sc_ops->sdo_flush)(sd, 0); 1118 if (error) 1119 sd->flags &= ~SDF_FLUSHING; 1120 else 1121 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1122 } else 1123 error = 0; 1124 return (error); 1125 1126 default: 1127 if (part != RAW_PART) 1128 return (ENOTTY); 1129 return (scsipi_do_ioctl(periph, dev, cmd, addr, flag, p)); 1130 } 1131 1132 #ifdef DIAGNOSTIC 1133 panic("sdioctl: impossible"); 1134 #endif 1135 } 1136 1137 void 1138 sdgetdefaultlabel(sd, lp) 1139 struct sd_softc *sd; 1140 struct disklabel *lp; 1141 { 1142 1143 memset(lp, 0, sizeof(struct disklabel)); 1144 1145 lp->d_secsize = sd->params.blksize; 1146 lp->d_ntracks = sd->params.heads; 1147 lp->d_nsectors = sd->params.sectors; 1148 lp->d_ncylinders = sd->params.cyls; 1149 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 1150 1151 switch (scsipi_periph_bustype(sd->sc_periph)) { 1152 #if NSD_SCSIBUS > 0 1153 case SCSIPI_BUSTYPE_SCSI: 1154 lp->d_type = DTYPE_SCSI; 1155 break; 1156 #endif 1157 #if NSD_ATAPIBUS > 0 1158 case SCSIPI_BUSTYPE_ATAPI: 1159 lp->d_type = DTYPE_ATAPI; 1160 break; 1161 #endif 1162 } 1163 strncpy(lp->d_typename, sd->name, 16); 1164 strncpy(lp->d_packname, "fictitious", 16); 1165 lp->d_secperunit = sd->params.disksize; 1166 lp->d_rpm = sd->params.rot_rate; 1167 lp->d_interleave = 1; 1168 lp->d_flags = 0; 1169 1170 lp->d_partitions[RAW_PART].p_offset = 0; 1171 lp->d_partitions[RAW_PART].p_size = 1172 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1173 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1174 lp->d_npartitions = RAW_PART + 1; 1175 1176 lp->d_magic = DISKMAGIC; 1177 lp->d_magic2 = DISKMAGIC; 1178 lp->d_checksum = dkcksum(lp); 1179 } 1180 1181 1182 /* 1183 * Load the label information on the named device 1184 */ 1185 void 1186 sdgetdisklabel(sd) 1187 struct sd_softc *sd; 1188 { 1189 struct disklabel *lp = sd->sc_dk.dk_label; 1190 const char *errstring; 1191 1192 memset(sd->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel)); 1193 1194 sdgetdefaultlabel(sd, lp); 1195 1196 if (lp->d_secpercyl == 0) { 1197 lp->d_secpercyl = 100; 1198 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1199 } 1200 1201 /* 1202 * Call the generic disklabel extraction routine 1203 */ 1204 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1205 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1206 if (errstring) { 1207 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1208 return; 1209 } 1210 } 1211 1212 void 1213 sd_shutdown(arg) 1214 void *arg; 1215 { 1216 struct sd_softc *sd = arg; 1217 1218 /* 1219 * If the disk cache needs to be flushed, and the disk supports 1220 * it, flush it. We're cold at this point, so we poll for 1221 * completion. 1222 */ 1223 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1224 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1225 printf("%s: cache synchronization failed\n", 1226 sd->sc_dev.dv_xname); 1227 sd->flags &= ~SDF_FLUSHING; 1228 } else 1229 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1230 } 1231 } 1232 1233 /* 1234 * Tell the device to map out a defective block 1235 */ 1236 int 1237 sd_reassign_blocks(sd, blkno) 1238 struct sd_softc *sd; 1239 u_long blkno; 1240 { 1241 struct scsi_reassign_blocks scsipi_cmd; 1242 struct scsi_reassign_blocks_data rbdata; 1243 1244 memset(&scsipi_cmd, 0, sizeof(scsipi_cmd)); 1245 memset(&rbdata, 0, sizeof(rbdata)); 1246 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1247 1248 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1249 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1250 1251 return (scsipi_command(sd->sc_periph, 1252 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1253 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1254 XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); 1255 } 1256 1257 /* 1258 * Check Errors 1259 */ 1260 int 1261 sd_interpret_sense(xs) 1262 struct scsipi_xfer *xs; 1263 { 1264 struct scsipi_periph *periph = xs->xs_periph; 1265 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1266 struct sd_softc *sd = (void *)periph->periph_dev; 1267 int s, error, retval = EJUSTRETURN; 1268 1269 /* 1270 * If the periph is already recovering, just do the normal 1271 * error processing. 1272 */ 1273 if (periph->periph_flags & PERIPH_RECOVERING) 1274 return (retval); 1275 1276 /* 1277 * If the device is not open yet, let the generic code handle it. 1278 */ 1279 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1280 return (retval); 1281 1282 /* 1283 * If it isn't a extended or extended/deferred error, let 1284 * the generic code handle it. 1285 */ 1286 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1287 (sense->error_code & SSD_ERRCODE) != 0x71) 1288 return (retval); 1289 1290 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1291 sense->add_sense_code == 0x4) { 1292 if (sense->add_sense_code_qual == 0x01) { 1293 /* 1294 * Unit In The Process Of Becoming Ready. 1295 */ 1296 printf("%s: waiting for pack to spin up...\n", 1297 sd->sc_dev.dv_xname); 1298 if (!callout_pending(&periph->periph_callout)) 1299 scsipi_periph_freeze(periph, 1); 1300 callout_reset(&periph->periph_callout, 1301 5 * hz, scsipi_periph_timed_thaw, periph); 1302 retval = ERESTART; 1303 } else if ((sense->add_sense_code_qual == 0x2) && 1304 (periph->periph_quirks & PQUIRK_NOSTARTUNIT) == 0) { 1305 printf("%s: pack is stopped, restarting...\n", 1306 sd->sc_dev.dv_xname); 1307 s = splbio(); 1308 periph->periph_flags |= PERIPH_RECOVERING; 1309 splx(s); 1310 error = scsipi_start(periph, SSS_START, 1311 XS_CTL_URGENT|XS_CTL_HEAD_TAG| 1312 XS_CTL_THAW_PERIPH|XS_CTL_FREEZE_PERIPH); 1313 if (error) { 1314 printf("%s: unable to restart pack\n", 1315 sd->sc_dev.dv_xname); 1316 retval = error; 1317 } else 1318 retval = ERESTART; 1319 s = splbio(); 1320 periph->periph_flags &= ~PERIPH_RECOVERING; 1321 splx(s); 1322 } 1323 } 1324 return (retval); 1325 } 1326 1327 1328 int 1329 sdsize(dev) 1330 dev_t dev; 1331 { 1332 struct sd_softc *sd; 1333 int part, unit, omask; 1334 int size; 1335 1336 unit = SDUNIT(dev); 1337 if (unit >= sd_cd.cd_ndevs) 1338 return (-1); 1339 sd = sd_cd.cd_devs[unit]; 1340 if (sd == NULL) 1341 return (-1); 1342 1343 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1344 return (-1); 1345 1346 part = SDPART(dev); 1347 omask = sd->sc_dk.dk_openmask & (1 << part); 1348 1349 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1350 return (-1); 1351 if ((sd->sc_periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1352 size = -1; 1353 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1354 size = -1; 1355 else 1356 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1357 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1358 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1359 return (-1); 1360 return (size); 1361 } 1362 1363 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1364 static struct scsipi_xfer sx; 1365 static int sddoingadump; 1366 1367 /* 1368 * dump all of physical memory into the partition specified, starting 1369 * at offset 'dumplo' into the partition. 1370 */ 1371 int 1372 sddump(dev, blkno, va, size) 1373 dev_t dev; 1374 daddr_t blkno; 1375 caddr_t va; 1376 size_t size; 1377 { 1378 struct sd_softc *sd; /* disk unit to do the I/O */ 1379 struct disklabel *lp; /* disk's disklabel */ 1380 int unit, part; 1381 int sectorsize; /* size of a disk sector */ 1382 int nsects; /* number of sectors in partition */ 1383 int sectoff; /* sector offset of partition */ 1384 int totwrt; /* total number of sectors left to write */ 1385 int nwrt; /* current number of sectors to write */ 1386 struct scsipi_rw_big cmd; /* write command */ 1387 struct scsipi_xfer *xs; /* ... convenience */ 1388 struct scsipi_periph *periph; 1389 struct scsipi_channel *chan; 1390 1391 /* Check if recursive dump; if so, punt. */ 1392 if (sddoingadump) 1393 return (EFAULT); 1394 1395 /* Mark as active early. */ 1396 sddoingadump = 1; 1397 1398 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1399 part = SDPART(dev); 1400 1401 /* Check for acceptable drive number. */ 1402 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1403 return (ENXIO); 1404 1405 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1406 return (ENODEV); 1407 1408 periph = sd->sc_periph; 1409 chan = periph->periph_channel; 1410 1411 /* Make sure it was initialized. */ 1412 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1413 return (ENXIO); 1414 1415 /* Convert to disk sectors. Request must be a multiple of size. */ 1416 lp = sd->sc_dk.dk_label; 1417 sectorsize = lp->d_secsize; 1418 if ((size % sectorsize) != 0) 1419 return (EFAULT); 1420 totwrt = size / sectorsize; 1421 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1422 1423 nsects = lp->d_partitions[part].p_size; 1424 sectoff = lp->d_partitions[part].p_offset; 1425 1426 /* Check transfer bounds against partition size. */ 1427 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1428 return (EINVAL); 1429 1430 /* Offset block number to start of partition. */ 1431 blkno += sectoff; 1432 1433 xs = &sx; 1434 1435 while (totwrt > 0) { 1436 nwrt = totwrt; /* XXX */ 1437 #ifndef SD_DUMP_NOT_TRUSTED 1438 /* 1439 * Fill out the scsi command 1440 */ 1441 memset(&cmd, 0, sizeof(cmd)); 1442 cmd.opcode = WRITE_BIG; 1443 _lto4b(blkno, cmd.addr); 1444 _lto2b(nwrt, cmd.length); 1445 /* 1446 * Fill out the scsipi_xfer structure 1447 * Note: we cannot sleep as we may be an interrupt 1448 * don't use scsipi_command() as it may want to wait 1449 * for an xs. 1450 */ 1451 memset(xs, 0, sizeof(sx)); 1452 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1453 XS_CTL_DATA_OUT; 1454 xs->xs_status = 0; 1455 xs->xs_periph = periph; 1456 xs->xs_retries = SDRETRIES; 1457 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1458 xs->cmd = (struct scsipi_generic *)&cmd; 1459 xs->cmdlen = sizeof(cmd); 1460 xs->resid = nwrt * sectorsize; 1461 xs->error = XS_NOERROR; 1462 xs->bp = 0; 1463 xs->data = va; 1464 xs->datalen = nwrt * sectorsize; 1465 1466 /* 1467 * Pass all this info to the scsi driver. 1468 */ 1469 scsipi_adapter_request(chan, ADAPTER_REQ_RUN_XFER, xs); 1470 if ((xs->xs_status & XS_STS_DONE) == 0 || 1471 xs->error != XS_NOERROR) 1472 return (EIO); 1473 #else /* SD_DUMP_NOT_TRUSTED */ 1474 /* Let's just talk about this first... */ 1475 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1476 delay(500 * 1000); /* half a second */ 1477 #endif /* SD_DUMP_NOT_TRUSTED */ 1478 1479 /* update block count */ 1480 totwrt -= nwrt; 1481 blkno += nwrt; 1482 va += sectorsize * nwrt; 1483 } 1484 sddoingadump = 0; 1485 return (0); 1486 } 1487