sd.c revision 1.321
1 /* $NetBSD: sd.c,v 1.321 2016/12/16 14:58:53 mlelstv Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2003, 2004 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Originally written by Julian Elischer (julian (at) dialix.oz.au) 34 * for TRW Financial Systems for use under the MACH(2.5) operating system. 35 * 36 * TRW Financial Systems, in accordance with their agreement with Carnegie 37 * Mellon University, makes this software available to CMU to distribute 38 * or use in any manner that they see fit as long as this message is kept with 39 * the software. For this reason TFS also grants any other persons or 40 * organisations permission to use or modify this software. 41 * 42 * TFS supplies this software to be publicly redistributed 43 * on the understanding that TFS is not responsible for the correct 44 * functioning of this software in any circumstances. 45 * 46 * Ported to run under 386BSD by Julian Elischer (julian (at) dialix.oz.au) Sept 1992 47 */ 48 49 #include <sys/cdefs.h> 50 __KERNEL_RCSID(0, "$NetBSD: sd.c,v 1.321 2016/12/16 14:58:53 mlelstv Exp $"); 51 52 #ifdef _KERNEL_OPT 53 #include "opt_scsi.h" 54 #endif 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/kernel.h> 59 #include <sys/file.h> 60 #include <sys/stat.h> 61 #include <sys/ioctl.h> 62 #include <sys/scsiio.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/uio.h> 66 #include <sys/malloc.h> 67 #include <sys/errno.h> 68 #include <sys/device.h> 69 #include <sys/disklabel.h> 70 #include <sys/disk.h> 71 #include <sys/proc.h> 72 #include <sys/conf.h> 73 #include <sys/vnode.h> 74 75 #include <dev/scsipi/scsi_spc.h> 76 #include <dev/scsipi/scsipi_all.h> 77 #include <dev/scsipi/scsi_all.h> 78 #include <dev/scsipi/scsipi_disk.h> 79 #include <dev/scsipi/scsi_disk.h> 80 #include <dev/scsipi/scsiconf.h> 81 #include <dev/scsipi/scsipi_base.h> 82 #include <dev/scsipi/sdvar.h> 83 84 #include <prop/proplib.h> 85 86 #define SDUNIT(dev) DISKUNIT(dev) 87 #define SDPART(dev) DISKPART(dev) 88 #define SDMINOR(unit, part) DISKMINOR(unit, part) 89 #define MAKESDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part) 90 91 #define SDLABELDEV(dev) (MAKESDDEV(major(dev), SDUNIT(dev), RAW_PART)) 92 93 #define SD_DEFAULT_BLKSIZE 512 94 95 static void sdminphys(struct buf *); 96 static void sdstart(struct scsipi_periph *); 97 static void sdrestart(void *); 98 static void sddone(struct scsipi_xfer *, int); 99 static bool sd_suspend(device_t, const pmf_qual_t *); 100 static bool sd_shutdown(device_t, int); 101 static int sd_interpret_sense(struct scsipi_xfer *); 102 static int sd_diskstart(device_t, struct buf *); 103 static int sd_dumpblocks(device_t, void *, daddr_t, int); 104 static void sd_iosize(device_t, int *); 105 static int sd_lastclose(device_t); 106 static int sd_firstopen(device_t, dev_t, int, int); 107 static void sd_label(device_t, struct disklabel *); 108 109 static int sd_mode_sense(struct sd_softc *, u_int8_t, void *, size_t, int, 110 int, int *); 111 static int sd_mode_select(struct sd_softc *, u_int8_t, void *, size_t, int, 112 int); 113 static int sd_validate_blksize(struct scsipi_periph *, int); 114 static u_int64_t sd_read_capacity(struct scsipi_periph *, int *, int flags); 115 static int sd_get_simplifiedparms(struct sd_softc *, struct disk_parms *, 116 int); 117 static int sd_get_capacity(struct sd_softc *, struct disk_parms *, int); 118 static int sd_get_parms(struct sd_softc *, struct disk_parms *, int); 119 static int sd_get_parms_page4(struct sd_softc *, struct disk_parms *, 120 int); 121 static int sd_get_parms_page5(struct sd_softc *, struct disk_parms *, 122 int); 123 124 static int sd_flush(struct sd_softc *, int); 125 static int sd_getcache(struct sd_softc *, int *); 126 static int sd_setcache(struct sd_softc *, int); 127 128 static int sdmatch(device_t, cfdata_t, void *); 129 static void sdattach(device_t, device_t, void *); 130 static int sddetach(device_t, int); 131 static void sd_set_geometry(struct sd_softc *); 132 133 CFATTACH_DECL3_NEW(sd, sizeof(struct sd_softc), sdmatch, sdattach, sddetach, 134 NULL, NULL, NULL, DVF_DETACH_SHUTDOWN); 135 136 extern struct cfdriver sd_cd; 137 138 static const struct scsipi_inquiry_pattern sd_patterns[] = { 139 {T_DIRECT, T_FIXED, 140 "", "", ""}, 141 {T_DIRECT, T_REMOV, 142 "", "", ""}, 143 {T_OPTICAL, T_FIXED, 144 "", "", ""}, 145 {T_OPTICAL, T_REMOV, 146 "", "", ""}, 147 {T_SIMPLE_DIRECT, T_FIXED, 148 "", "", ""}, 149 {T_SIMPLE_DIRECT, T_REMOV, 150 "", "", ""}, 151 }; 152 153 static dev_type_open(sdopen); 154 static dev_type_close(sdclose); 155 static dev_type_read(sdread); 156 static dev_type_write(sdwrite); 157 static dev_type_ioctl(sdioctl); 158 static dev_type_strategy(sdstrategy); 159 static dev_type_dump(sddump); 160 static dev_type_size(sdsize); 161 162 const struct bdevsw sd_bdevsw = { 163 .d_open = sdopen, 164 .d_close = sdclose, 165 .d_strategy = sdstrategy, 166 .d_ioctl = sdioctl, 167 .d_dump = sddump, 168 .d_psize = sdsize, 169 .d_discard = nodiscard, 170 .d_flag = D_DISK | D_MPSAFE 171 }; 172 173 const struct cdevsw sd_cdevsw = { 174 .d_open = sdopen, 175 .d_close = sdclose, 176 .d_read = sdread, 177 .d_write = sdwrite, 178 .d_ioctl = sdioctl, 179 .d_stop = nostop, 180 .d_tty = notty, 181 .d_poll = nopoll, 182 .d_mmap = nommap, 183 .d_kqfilter = nokqfilter, 184 .d_discard = nodiscard, 185 .d_flag = D_DISK | D_MPSAFE 186 }; 187 188 static struct dkdriver sddkdriver = { 189 .d_open = sdopen, 190 .d_close = sdclose, 191 .d_strategy = sdstrategy, 192 .d_minphys = sdminphys, 193 .d_diskstart = sd_diskstart, 194 .d_dumpblocks = sd_dumpblocks, 195 .d_iosize = sd_iosize, 196 .d_firstopen = sd_firstopen, 197 .d_lastclose = sd_lastclose, 198 .d_label = sd_label, 199 }; 200 201 static const struct scsipi_periphsw sd_switch = { 202 sd_interpret_sense, /* check our error handler first */ 203 sdstart, /* have a queue, served by this */ 204 NULL, /* have no async handler */ 205 sddone, /* deal with stats at interrupt time */ 206 }; 207 208 struct sd_mode_sense_data { 209 /* 210 * XXX 211 * We are not going to parse this as-is -- it just has to be large 212 * enough. 213 */ 214 union { 215 struct scsi_mode_parameter_header_6 small; 216 struct scsi_mode_parameter_header_10 big; 217 } header; 218 struct scsi_general_block_descriptor blk_desc; 219 union scsi_disk_pages pages; 220 }; 221 222 /* 223 * The routine called by the low level scsi routine when it discovers 224 * A device suitable for this driver 225 */ 226 static int 227 sdmatch(device_t parent, cfdata_t match, 228 void *aux) 229 { 230 struct scsipibus_attach_args *sa = aux; 231 int priority; 232 233 (void)scsipi_inqmatch(&sa->sa_inqbuf, 234 sd_patterns, sizeof(sd_patterns) / sizeof(sd_patterns[0]), 235 sizeof(sd_patterns[0]), &priority); 236 237 return (priority); 238 } 239 240 /* 241 * Attach routine common to atapi & scsi. 242 */ 243 static void 244 sdattach(device_t parent, device_t self, void *aux) 245 { 246 struct sd_softc *sd = device_private(self); 247 struct dk_softc *dksc = &sd->sc_dksc; 248 struct scsipibus_attach_args *sa = aux; 249 struct scsipi_periph *periph = sa->sa_periph; 250 int error, result, dtype; 251 struct disk_parms *dp = &sd->params; 252 char pbuf[9]; 253 254 SC_DEBUG(periph, SCSIPI_DB2, ("sdattach: ")); 255 256 sd->type = (sa->sa_inqbuf.type & SID_TYPE); 257 strncpy(sd->name, sa->sa_inqbuf.product, sizeof(sd->name)); 258 259 if (sd->type == T_SIMPLE_DIRECT) 260 periph->periph_quirks |= PQUIRK_ONLYBIG | PQUIRK_NOBIGMODESENSE; 261 262 switch (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(sa->sa_periph))) { 263 case SCSIPI_BUSTYPE_SCSI: 264 dtype = DKTYPE_SCSI; 265 if (periph->periph_version == 0) 266 sd->flags |= SDF_ANCIENT; 267 break; 268 case SCSIPI_BUSTYPE_ATAPI: 269 dtype = DKTYPE_ATAPI; 270 break; 271 default: 272 dtype = DKTYPE_UNKNOWN; 273 break; 274 } 275 276 /* Initialize dk and disk structure. */ 277 dk_init(dksc, self, dtype); 278 disk_init(&dksc->sc_dkdev, dksc->sc_xname, &sddkdriver); 279 280 /* Attach dk and disk subsystems */ 281 dk_attach(dksc); 282 disk_attach(&dksc->sc_dkdev); 283 284 bufq_alloc(&dksc->sc_bufq, BUFQ_DISK_DEFAULT_STRAT, BUFQ_SORT_RAWBLOCK); 285 286 callout_init(&sd->sc_callout, 0); 287 288 /* 289 * Store information needed to contact our base driver 290 */ 291 sd->sc_periph = periph; 292 293 periph->periph_dev = dksc->sc_dev; 294 periph->periph_switch = &sd_switch; 295 296 /* 297 * Increase our openings to the maximum-per-periph 298 * supported by the adapter. This will either be 299 * clamped down or grown by the adapter if necessary. 300 */ 301 periph->periph_openings = 302 SCSIPI_CHAN_MAX_PERIPH(periph->periph_channel); 303 periph->periph_flags |= PERIPH_GROW_OPENINGS; 304 305 /* 306 * Use the subdriver to request information regarding the drive. 307 */ 308 aprint_naive("\n"); 309 aprint_normal("\n"); 310 311 if (periph->periph_quirks & PQUIRK_START) 312 (void)scsipi_start(periph, SSS_START, XS_CTL_SILENT); 313 314 error = scsipi_test_unit_ready(periph, 315 XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST | 316 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT_NODEV); 317 if (error) 318 result = SDGP_RESULT_OFFLINE; 319 else 320 result = sd_get_parms(sd, &sd->params, XS_CTL_DISCOVERY); 321 322 aprint_normal_dev(dksc->sc_dev, ""); 323 switch (result) { 324 case SDGP_RESULT_OK: 325 format_bytes(pbuf, sizeof(pbuf), 326 (u_int64_t)dp->disksize * dp->blksize); 327 aprint_normal( 328 "%s, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %llu sectors", 329 pbuf, dp->cyls, dp->heads, dp->sectors, dp->blksize, 330 (unsigned long long)dp->disksize); 331 break; 332 333 case SDGP_RESULT_OFFLINE: 334 aprint_normal("drive offline"); 335 break; 336 337 case SDGP_RESULT_UNFORMATTED: 338 aprint_normal("unformatted media"); 339 break; 340 341 #ifdef DIAGNOSTIC 342 default: 343 panic("sdattach: unknown result from get_parms"); 344 break; 345 #endif 346 } 347 aprint_normal("\n"); 348 349 /* Discover wedges on this disk. */ 350 dkwedge_discover(&dksc->sc_dkdev); 351 352 /* 353 * Establish a shutdown hook so that we can ensure that 354 * our data has actually made it onto the platter at 355 * shutdown time. Note that this relies on the fact 356 * that the shutdown hooks at the "leaves" of the device tree 357 * are run, first (thus guaranteeing that our hook runs before 358 * our ancestors'). 359 */ 360 if (!pmf_device_register1(self, sd_suspend, NULL, sd_shutdown)) 361 aprint_error_dev(self, "couldn't establish power handler\n"); 362 } 363 364 static int 365 sddetach(device_t self, int flags) 366 { 367 struct sd_softc *sd = device_private(self); 368 struct dk_softc *dksc = &sd->sc_dksc; 369 struct scsipi_periph *periph = sd->sc_periph; 370 struct scsipi_channel *chan = periph->periph_channel; 371 int bmaj, cmaj, i, mn, rc; 372 373 if ((rc = disk_begindetach(&dksc->sc_dkdev, sd_lastclose, self, flags)) != 0) 374 return rc; 375 376 /* locate the major number */ 377 bmaj = bdevsw_lookup_major(&sd_bdevsw); 378 cmaj = cdevsw_lookup_major(&sd_cdevsw); 379 380 /* Nuke the vnodes for any open instances */ 381 for (i = 0; i < MAXPARTITIONS; i++) { 382 mn = SDMINOR(device_unit(self), i); 383 vdevgone(bmaj, mn, mn, VBLK); 384 vdevgone(cmaj, mn, mn, VCHR); 385 } 386 387 /* kill any pending restart */ 388 callout_stop(&sd->sc_callout); 389 390 dk_drain(dksc); 391 392 /* Kill off any pending commands. */ 393 mutex_enter(chan_mtx(chan)); 394 scsipi_kill_pending(periph); 395 mutex_exit(chan_mtx(chan)); 396 397 bufq_free(dksc->sc_bufq); 398 399 /* Delete all of our wedges. */ 400 dkwedge_delall(&dksc->sc_dkdev); 401 402 /* Detach from the disk list. */ 403 disk_detach(&dksc->sc_dkdev); 404 disk_destroy(&dksc->sc_dkdev); 405 406 dk_detach(dksc); 407 408 callout_destroy(&sd->sc_callout); 409 410 pmf_device_deregister(self); 411 412 return (0); 413 } 414 415 /* 416 * Serialized by caller 417 */ 418 static int 419 sd_firstopen(device_t self, dev_t dev, int flag, int fmt) 420 { 421 struct sd_softc *sd = device_private(self); 422 struct scsipi_periph *periph = sd->sc_periph; 423 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 424 int error, silent; 425 int part, removable; 426 427 part = SDPART(dev); 428 429 error = scsipi_adapter_addref(adapt); 430 if (error) 431 return error; 432 433 if ((part == RAW_PART && fmt == S_IFCHR) || (flag & FSILENT)) 434 silent = XS_CTL_SILENT; 435 else 436 silent = 0; 437 438 /* Check that it is still responding and ok. */ 439 error = scsipi_test_unit_ready(periph, 440 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE | 441 silent); 442 443 /* 444 * Start the pack spinning if necessary. Always allow the 445 * raw parition to be opened, for raw IOCTLs. Data transfers 446 * will check for SDEV_MEDIA_LOADED. 447 */ 448 if (error == EIO) { 449 error = scsipi_start(periph, SSS_START, silent); 450 if (error == EINVAL) 451 error = EIO; 452 } 453 if (error) 454 goto bad; 455 456 removable = (periph->periph_flags & PERIPH_REMOVABLE) != 0; 457 if (removable) { 458 /* Lock the pack in. */ 459 error = scsipi_prevent(periph, SPAMR_PREVENT_DT, 460 XS_CTL_IGNORE_ILLEGAL_REQUEST | 461 XS_CTL_IGNORE_MEDIA_CHANGE | 462 XS_CTL_SILENT); 463 if (error) 464 goto bad; 465 } 466 467 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 468 int param_error; 469 470 /* 471 * Load the physical device parameters. 472 * 473 * Note that if media is present but unformatted, 474 * we allow the open (so that it can be formatted!). 475 * The drive should refuse real I/O, if the media is 476 * unformatted. 477 */ 478 param_error = sd_get_parms(sd, &sd->params, 0); 479 if (param_error == SDGP_RESULT_OFFLINE) { 480 error = ENXIO; 481 goto bad2; 482 } 483 periph->periph_flags |= PERIPH_MEDIA_LOADED; 484 485 SC_DEBUG(periph, SCSIPI_DB3, ("Params loaded ")); 486 } 487 488 periph->periph_flags |= PERIPH_OPEN; 489 return 0; 490 491 bad2: 492 if (removable) 493 scsipi_prevent(periph, SPAMR_ALLOW, 494 XS_CTL_IGNORE_ILLEGAL_REQUEST | 495 XS_CTL_IGNORE_MEDIA_CHANGE | 496 XS_CTL_SILENT); 497 498 bad: 499 scsipi_adapter_delref(adapt); 500 return error; 501 } 502 503 /* 504 * open the device. Make sure the partition info is a up-to-date as can be. 505 */ 506 static int 507 sdopen(dev_t dev, int flag, int fmt, struct lwp *l) 508 { 509 struct sd_softc *sd; 510 struct dk_softc *dksc; 511 struct scsipi_periph *periph; 512 int unit, part; 513 int error; 514 515 unit = SDUNIT(dev); 516 sd = device_lookup_private(&sd_cd, unit); 517 if (sd == NULL) 518 return (ENXIO); 519 dksc = &sd->sc_dksc; 520 521 if (!device_is_active(dksc->sc_dev)) 522 return (ENODEV); 523 524 periph = sd->sc_periph; 525 part = SDPART(dev); 526 527 SC_DEBUG(periph, SCSIPI_DB1, 528 ("sdopen: dev=0x%"PRIx64" (unit %d (of %d), partition %d)\n", 529 dev, unit, sd_cd.cd_ndevs, SDPART(dev))); 530 531 /* 532 * If any partition is open, but the disk has been invalidated, 533 * disallow further opens of non-raw partition 534 */ 535 if ((periph->periph_flags & (PERIPH_OPEN | PERIPH_MEDIA_LOADED)) == 536 PERIPH_OPEN) { 537 if (part != RAW_PART || fmt != S_IFCHR) 538 return EIO; 539 } 540 541 error = dk_open(dksc, dev, flag, fmt, l); 542 543 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 544 545 return error; 546 } 547 548 /* 549 * Serialized by caller 550 */ 551 static int 552 sd_lastclose(device_t self) 553 { 554 struct sd_softc *sd = device_private(self); 555 struct dk_softc *dksc = &sd->sc_dksc; 556 struct scsipi_periph *periph = sd->sc_periph; 557 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 558 559 /* 560 * If the disk cache needs flushing, and the disk supports 561 * it, do it now. 562 */ 563 if ((sd->flags & SDF_DIRTY) != 0) { 564 if (sd_flush(sd, 0)) { 565 aprint_error_dev(dksc->sc_dev, 566 "cache synchronization failed\n"); 567 sd->flags &= ~SDF_FLUSHING; 568 } else 569 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 570 } 571 572 scsipi_wait_drain(periph); 573 574 if (periph->periph_flags & PERIPH_REMOVABLE) 575 scsipi_prevent(periph, SPAMR_ALLOW, 576 XS_CTL_IGNORE_ILLEGAL_REQUEST | 577 XS_CTL_IGNORE_NOT_READY | 578 XS_CTL_SILENT); 579 periph->periph_flags &= ~PERIPH_OPEN; 580 581 scsipi_wait_drain(periph); 582 583 scsipi_adapter_delref(adapt); 584 585 return 0; 586 } 587 588 /* 589 * close the device.. only called if we are the LAST occurence of an open 590 * device. Convenient now but usually a pain. 591 */ 592 static int 593 sdclose(dev_t dev, int flag, int fmt, struct lwp *l) 594 { 595 struct sd_softc *sd; 596 struct dk_softc *dksc; 597 int unit; 598 599 unit = SDUNIT(dev); 600 sd = device_lookup_private(&sd_cd, unit); 601 dksc = &sd->sc_dksc; 602 603 return dk_close(dksc, dev, flag, fmt, l); 604 } 605 606 /* 607 * Actually translate the requested transfer into one the physical driver 608 * can understand. The transfer is described by a buf and will include 609 * only one physical transfer. 610 */ 611 static void 612 sdstrategy(struct buf *bp) 613 { 614 struct sd_softc *sd = device_lookup_private(&sd_cd, SDUNIT(bp->b_dev)); 615 struct dk_softc *dksc = &sd->sc_dksc; 616 struct scsipi_periph *periph = sd->sc_periph; 617 618 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdstrategy ")); 619 SC_DEBUG(sd->sc_periph, SCSIPI_DB1, 620 ("%d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 621 622 /* 623 * If the device has been made invalid, error out 624 */ 625 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 || 626 !device_is_active(dksc->sc_dev)) { 627 if (periph->periph_flags & PERIPH_OPEN) 628 bp->b_error = EIO; 629 else 630 bp->b_error = ENODEV; 631 632 bp->b_resid = bp->b_bcount; 633 biodone(bp); 634 return; 635 } 636 637 dk_strategy(dksc, bp); 638 } 639 640 /* 641 * Issue single I/O command 642 * 643 * Called from dk_start and implicitely from dk_strategy 644 */ 645 static int 646 sd_diskstart(device_t dev, struct buf *bp) 647 { 648 struct sd_softc *sd = device_private(dev); 649 struct scsipi_periph *periph = sd->sc_periph; 650 struct scsipi_channel *chan = periph->periph_channel; 651 struct scsipi_rw_16 cmd16; 652 struct scsipi_rw_10 cmd_big; 653 struct scsi_rw_6 cmd_small; 654 struct scsipi_generic *cmdp; 655 struct scsipi_xfer *xs; 656 int error, flags, nblks, cmdlen; 657 658 mutex_enter(chan_mtx(chan)); 659 660 if (periph->periph_active >= periph->periph_openings) { 661 error = EAGAIN; 662 goto out; 663 } 664 665 /* 666 * there is excess capacity, but a special waits 667 * It'll need the adapter as soon as we clear out of the 668 * way and let it run (user level wait). 669 */ 670 if (periph->periph_flags & PERIPH_WAITING) { 671 periph->periph_flags &= ~PERIPH_WAITING; 672 cv_broadcast(periph_cv_periph(periph)); 673 error = EAGAIN; 674 goto out; 675 } 676 677 /* 678 * If the device has become invalid, abort all the 679 * reads and writes until all files have been closed and 680 * re-opened 681 */ 682 if (__predict_false( 683 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 684 error = EIO; 685 goto out; 686 } 687 688 /* 689 * Mark the disk dirty so that the cache will be 690 * flushed on close. 691 */ 692 if ((bp->b_flags & B_READ) == 0) 693 sd->flags |= SDF_DIRTY; 694 695 if (sd->params.blksize == DEV_BSIZE) 696 nblks = bp->b_bcount >> DEV_BSHIFT; 697 else 698 nblks = howmany(bp->b_bcount, sd->params.blksize); 699 700 /* 701 * Fill out the scsi command. Use the smallest CDB possible 702 * (6-byte, 10-byte, or 16-byte). 703 */ 704 if (((bp->b_rawblkno & 0x1fffff) == bp->b_rawblkno) && 705 ((nblks & 0xff) == nblks) && 706 !(periph->periph_quirks & PQUIRK_ONLYBIG)) { 707 /* 6-byte CDB */ 708 memset(&cmd_small, 0, sizeof(cmd_small)); 709 cmd_small.opcode = (bp->b_flags & B_READ) ? 710 SCSI_READ_6_COMMAND : SCSI_WRITE_6_COMMAND; 711 _lto3b(bp->b_rawblkno, cmd_small.addr); 712 cmd_small.length = nblks & 0xff; 713 cmdlen = sizeof(cmd_small); 714 cmdp = (struct scsipi_generic *)&cmd_small; 715 } else if ((bp->b_rawblkno & 0xffffffff) == bp->b_rawblkno) { 716 /* 10-byte CDB */ 717 memset(&cmd_big, 0, sizeof(cmd_big)); 718 cmd_big.opcode = (bp->b_flags & B_READ) ? 719 READ_10 : WRITE_10; 720 _lto4b(bp->b_rawblkno, cmd_big.addr); 721 _lto2b(nblks, cmd_big.length); 722 cmdlen = sizeof(cmd_big); 723 cmdp = (struct scsipi_generic *)&cmd_big; 724 } else { 725 /* 16-byte CDB */ 726 memset(&cmd16, 0, sizeof(cmd16)); 727 cmd16.opcode = (bp->b_flags & B_READ) ? 728 READ_16 : WRITE_16; 729 _lto8b(bp->b_rawblkno, cmd16.addr); 730 _lto4b(nblks, cmd16.length); 731 cmdlen = sizeof(cmd16); 732 cmdp = (struct scsipi_generic *)&cmd16; 733 } 734 735 /* 736 * Figure out what flags to use. 737 */ 738 flags = XS_CTL_NOSLEEP|XS_CTL_ASYNC|XS_CTL_SIMPLE_TAG; 739 if (bp->b_flags & B_READ) 740 flags |= XS_CTL_DATA_IN; 741 else 742 flags |= XS_CTL_DATA_OUT; 743 744 /* 745 * Call the routine that chats with the adapter. 746 * Note: we cannot sleep as we may be an interrupt 747 */ 748 xs = scsipi_make_xs_locked(periph, cmdp, cmdlen, 749 (u_char *)bp->b_data, bp->b_bcount, 750 SDRETRIES, SD_IO_TIMEOUT, bp, flags); 751 if (__predict_false(xs == NULL)) { 752 /* 753 * out of memory. Keep this buffer in the queue, and 754 * retry later. 755 */ 756 callout_reset(&sd->sc_callout, hz / 2, sdrestart, sd); 757 error = 0; 758 goto out; 759 } 760 761 error = scsipi_execute_xs(xs); 762 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 763 KASSERT(error == 0); 764 765 out: 766 mutex_exit(chan_mtx(chan)); 767 768 return error; 769 } 770 771 /* 772 * Recover I/O request after memory shortage 773 * 774 * Called from callout 775 */ 776 static void 777 sdrestart(void *v) 778 { 779 struct sd_softc *sd = v; 780 struct dk_softc *dksc = &sd->sc_dksc; 781 782 dk_start(dksc, NULL); 783 } 784 785 /* 786 * Recover I/O request after memory shortage 787 * 788 * Called from scsipi midlayer when resources have been freed 789 * with channel lock held 790 */ 791 static void 792 sdstart(struct scsipi_periph *periph) 793 { 794 struct sd_softc *sd = device_private(periph->periph_dev); 795 struct dk_softc *dksc = &sd->sc_dksc; 796 struct scsipi_channel *chan = periph->periph_channel; 797 798 /* 799 * release channel lock as dk_start may need to acquire 800 * other locks 801 * 802 * sdstart is called from scsipi_put_xs and all its callers 803 * release the lock afterwards. So releasing it here 804 * doesn't matter. 805 */ 806 mutex_exit(chan_mtx(chan)); 807 808 dk_start(dksc, NULL); 809 810 mutex_enter(chan_mtx(chan)); 811 } 812 813 static void 814 sddone(struct scsipi_xfer *xs, int error) 815 { 816 struct sd_softc *sd = device_private(xs->xs_periph->periph_dev); 817 struct dk_softc *dksc = &sd->sc_dksc; 818 struct buf *bp = xs->bp; 819 820 if (sd->flags & SDF_FLUSHING) { 821 /* Flush completed, no longer dirty. */ 822 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 823 } 824 825 if (bp) { 826 bp->b_error = error; 827 bp->b_resid = xs->resid; 828 if (error) { 829 /* on a read/write error bp->b_resid is zero, so fix */ 830 bp->b_resid = bp->b_bcount; 831 } 832 833 dk_done(dksc, bp); 834 /* dk_start is called from scsipi_complete */ 835 } 836 } 837 838 static void 839 sdminphys(struct buf *bp) 840 { 841 struct sd_softc *sd = device_lookup_private(&sd_cd, SDUNIT(bp->b_dev)); 842 struct dk_softc *dksc = &sd->sc_dksc; 843 long xmax; 844 845 /* 846 * If the device is ancient, we want to make sure that 847 * the transfer fits into a 6-byte cdb. 848 * 849 * XXX Note that the SCSI-I spec says that 256-block transfers 850 * are allowed in a 6-byte read/write, and are specified 851 * by settng the "length" to 0. However, we're conservative 852 * here, allowing only 255-block transfers in case an 853 * ancient device gets confused by length == 0. A length of 0 854 * in a 10-byte read/write actually means 0 blocks. 855 */ 856 if ((sd->flags & SDF_ANCIENT) && 857 ((sd->sc_periph->periph_flags & 858 (PERIPH_REMOVABLE | PERIPH_MEDIA_LOADED)) != PERIPH_REMOVABLE)) { 859 xmax = dksc->sc_dkdev.dk_geom.dg_secsize * 0xff; 860 861 if (bp->b_bcount > xmax) 862 bp->b_bcount = xmax; 863 } 864 865 scsipi_adapter_minphys(sd->sc_periph->periph_channel, bp); 866 } 867 868 static void 869 sd_iosize(device_t dev, int *count) 870 { 871 struct buf B; 872 int bmaj; 873 874 bmaj = bdevsw_lookup_major(&sd_bdevsw); 875 B.b_dev = MAKESDDEV(bmaj,device_unit(dev),RAW_PART); 876 B.b_bcount = *count; 877 878 sdminphys(&B); 879 880 *count = B.b_bcount; 881 } 882 883 static int 884 sdread(dev_t dev, struct uio *uio, int ioflag) 885 { 886 887 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 888 } 889 890 static int 891 sdwrite(dev_t dev, struct uio *uio, int ioflag) 892 { 893 894 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 895 } 896 897 /* 898 * Perform special action on behalf of the user 899 * Knows about the internals of this device 900 */ 901 static int 902 sdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 903 { 904 struct sd_softc *sd = device_lookup_private(&sd_cd, SDUNIT(dev)); 905 struct dk_softc *dksc = &sd->sc_dksc; 906 struct scsipi_periph *periph = sd->sc_periph; 907 908 int part = SDPART(dev); 909 int error; 910 911 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdioctl 0x%lx ", cmd)); 912 913 /* 914 * If the device is not valid, some IOCTLs can still be 915 * handled on the raw partition. Check this here. 916 */ 917 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 && 918 part != RAW_PART) 919 return (EIO); 920 921 switch (cmd) { 922 case DIOCLOCK: 923 if (periph->periph_flags & PERIPH_REMOVABLE) 924 return (scsipi_prevent(periph, 925 (*(int *)addr) ? 926 SPAMR_PREVENT_DT : SPAMR_ALLOW, 0)); 927 else 928 return (ENOTTY); 929 930 case DIOCEJECT: 931 if ((periph->periph_flags & PERIPH_REMOVABLE) == 0) 932 return (ENOTTY); 933 if (*(int *)addr == 0) { 934 /* 935 * Don't force eject: check that we are the only 936 * partition open. If so, unlock it. 937 */ 938 if (DK_BUSY(dksc, part) == 0) { 939 error = scsipi_prevent(periph, SPAMR_ALLOW, 940 XS_CTL_IGNORE_NOT_READY); 941 if (error) 942 return (error); 943 } else { 944 return (EBUSY); 945 } 946 } 947 /* FALLTHROUGH */ 948 case ODIOCEJECT: 949 return ((periph->periph_flags & PERIPH_REMOVABLE) == 0 ? 950 ENOTTY : scsipi_start(periph, SSS_STOP|SSS_LOEJ, 0)); 951 952 case DIOCGCACHE: 953 return (sd_getcache(sd, (int *) addr)); 954 955 case DIOCSCACHE: 956 if ((flag & FWRITE) == 0) 957 return (EBADF); 958 return (sd_setcache(sd, *(int *) addr)); 959 960 case DIOCCACHESYNC: 961 /* 962 * XXX Do we really need to care about having a writable 963 * file descriptor here? 964 */ 965 if ((flag & FWRITE) == 0) 966 return (EBADF); 967 if (((sd->flags & SDF_DIRTY) != 0 || *(int *)addr != 0)) { 968 error = sd_flush(sd, 0); 969 if (error) { 970 sd->flags &= ~SDF_FLUSHING; 971 return (error); 972 } 973 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 974 } 975 return (0); 976 977 default: 978 error = dk_ioctl(dksc, dev, cmd, addr, flag, l); 979 if (error == ENOTTY) 980 error = scsipi_do_ioctl(periph, dev, cmd, addr, flag, l); 981 return (error); 982 } 983 984 #ifdef DIAGNOSTIC 985 panic("sdioctl: impossible"); 986 #endif 987 } 988 989 static void 990 sd_label(device_t self, struct disklabel *lp) 991 { 992 struct sd_softc *sd = device_private(self); 993 994 strncpy(lp->d_typename, sd->name, 16); 995 lp->d_rpm = sd->params.rot_rate; 996 if (sd->sc_periph->periph_flags & PERIPH_REMOVABLE) 997 lp->d_flags |= D_REMOVABLE; 998 } 999 1000 static bool 1001 sd_shutdown(device_t self, int how) 1002 { 1003 struct sd_softc *sd = device_private(self); 1004 struct dk_softc *dksc = &sd->sc_dksc; 1005 1006 /* 1007 * If the disk cache needs to be flushed, and the disk supports 1008 * it, flush it. We're cold at this point, so we poll for 1009 * completion. 1010 */ 1011 if ((sd->flags & SDF_DIRTY) != 0) { 1012 if (sd_flush(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1013 aprint_error_dev(dksc->sc_dev, 1014 "cache synchronization failed\n"); 1015 sd->flags &= ~SDF_FLUSHING; 1016 } else 1017 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1018 } 1019 return true; 1020 } 1021 1022 static bool 1023 sd_suspend(device_t dv, const pmf_qual_t *qual) 1024 { 1025 return sd_shutdown(dv, boothowto); /* XXX no need to poll */ 1026 } 1027 1028 /* 1029 * Check Errors 1030 */ 1031 static int 1032 sd_interpret_sense(struct scsipi_xfer *xs) 1033 { 1034 struct scsipi_periph *periph = xs->xs_periph; 1035 struct scsipi_channel *chan = periph->periph_channel; 1036 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 1037 struct sd_softc *sd = device_private(periph->periph_dev); 1038 struct dk_softc *dksc = &sd->sc_dksc; 1039 int error, retval = EJUSTRETURN; 1040 1041 /* 1042 * If the periph is already recovering, just do the normal 1043 * error processing. 1044 */ 1045 if (periph->periph_flags & PERIPH_RECOVERING) 1046 return (retval); 1047 1048 /* 1049 * Ignore errors from accessing illegal fields (e.g. trying to 1050 * lock the door of a digicam, which doesn't have a door that 1051 * can be locked) for the SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL command. 1052 */ 1053 if (xs->cmd->opcode == SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL && 1054 SSD_SENSE_KEY(sense->flags) == SKEY_ILLEGAL_REQUEST && 1055 sense->asc == 0x24 && 1056 sense->ascq == 0x00) { /* Illegal field in CDB */ 1057 if (!(xs->xs_control & XS_CTL_SILENT)) { 1058 scsipi_printaddr(periph); 1059 printf("no door lock\n"); 1060 } 1061 xs->xs_control |= XS_CTL_IGNORE_ILLEGAL_REQUEST; 1062 return (retval); 1063 } 1064 1065 1066 1067 /* 1068 * If the device is not open yet, let the generic code handle it. 1069 */ 1070 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1071 return (retval); 1072 1073 /* 1074 * If it isn't a extended or extended/deferred error, let 1075 * the generic code handle it. 1076 */ 1077 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 1078 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 1079 return (retval); 1080 1081 if (SSD_SENSE_KEY(sense->flags) == SKEY_NOT_READY && 1082 sense->asc == 0x4) { 1083 if (sense->ascq == 0x01) { 1084 /* 1085 * Unit In The Process Of Becoming Ready. 1086 */ 1087 printf("%s: waiting for pack to spin up...\n", 1088 dksc->sc_xname); 1089 if (!callout_pending(&periph->periph_callout)) 1090 scsipi_periph_freeze(periph, 1); 1091 callout_reset(&periph->periph_callout, 1092 5 * hz, scsipi_periph_timed_thaw, periph); 1093 retval = ERESTART; 1094 } else if (sense->ascq == 0x02) { 1095 printf("%s: pack is stopped, restarting...\n", 1096 dksc->sc_xname); 1097 mutex_enter(chan_mtx(chan)); 1098 periph->periph_flags |= PERIPH_RECOVERING; 1099 mutex_exit(chan_mtx(chan)); 1100 error = scsipi_start(periph, SSS_START, 1101 XS_CTL_URGENT|XS_CTL_HEAD_TAG| 1102 XS_CTL_THAW_PERIPH|XS_CTL_FREEZE_PERIPH); 1103 if (error) { 1104 aprint_error_dev(dksc->sc_dev, 1105 "unable to restart pack\n"); 1106 retval = error; 1107 } else 1108 retval = ERESTART; 1109 mutex_enter(chan_mtx(chan)); 1110 periph->periph_flags &= ~PERIPH_RECOVERING; 1111 mutex_exit(chan_mtx(chan)); 1112 } 1113 } 1114 if (SSD_SENSE_KEY(sense->flags) == SKEY_MEDIUM_ERROR && 1115 sense->asc == 0x31 && 1116 sense->ascq == 0x00) { /* maybe for any asq ? */ 1117 /* Medium Format Corrupted */ 1118 retval = EFTYPE; 1119 } 1120 return (retval); 1121 } 1122 1123 1124 static int 1125 sdsize(dev_t dev) 1126 { 1127 struct sd_softc *sd; 1128 struct dk_softc *dksc; 1129 int unit; 1130 1131 unit = SDUNIT(dev); 1132 sd = device_lookup_private(&sd_cd, unit); 1133 if (sd == NULL) 1134 return (-1); 1135 dksc = &sd->sc_dksc; 1136 1137 if (!device_is_active(dksc->sc_dev)) 1138 return (-1); 1139 1140 return dk_size(dksc, dev); 1141 } 1142 1143 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1144 static struct scsipi_xfer sx; 1145 1146 /* 1147 * dump all of physical memory into the partition specified, starting 1148 * at offset 'dumplo' into the partition. 1149 */ 1150 static int 1151 sddump(dev_t dev, daddr_t blkno, void *va, size_t size) 1152 { 1153 struct sd_softc *sd; 1154 struct dk_softc *dksc; 1155 struct scsipi_periph *periph; 1156 int unit; 1157 1158 unit = SDUNIT(dev); 1159 if ((sd = device_lookup_private(&sd_cd, unit)) == NULL) 1160 return (ENXIO); 1161 dksc = &sd->sc_dksc; 1162 1163 if (!device_is_active(dksc->sc_dev)) 1164 return (ENODEV); 1165 1166 periph = sd->sc_periph; 1167 1168 /* Make sure it was initialized. */ 1169 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1170 return (ENXIO); 1171 1172 return dk_dump(dksc, dev, blkno, va, size); 1173 } 1174 1175 static int 1176 sd_dumpblocks(device_t dev, void *va, daddr_t blkno, int nblk) 1177 { 1178 struct sd_softc *sd = device_private(dev); 1179 struct dk_softc *dksc = &sd->sc_dksc; 1180 struct disk_geom *dg = &dksc->sc_dkdev.dk_geom; 1181 struct scsipi_rw_10 cmd; /* write command */ 1182 struct scsipi_xfer *xs; /* ... convenience */ 1183 struct scsipi_periph *periph; 1184 struct scsipi_channel *chan; 1185 size_t sectorsize; 1186 1187 periph = sd->sc_periph; 1188 chan = periph->periph_channel; 1189 1190 sectorsize = dg->dg_secsize; 1191 1192 xs = &sx; 1193 1194 #ifndef SD_DUMP_NOT_TRUSTED 1195 /* 1196 * Fill out the scsi command 1197 */ 1198 memset(&cmd, 0, sizeof(cmd)); 1199 cmd.opcode = WRITE_10; 1200 _lto4b(blkno, cmd.addr); 1201 _lto2b(nblk, cmd.length); 1202 /* 1203 * Fill out the scsipi_xfer structure 1204 * Note: we cannot sleep as we may be an interrupt 1205 * don't use scsipi_command() as it may want to wait 1206 * for an xs. 1207 */ 1208 memset(xs, 0, sizeof(sx)); 1209 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1210 XS_CTL_DATA_OUT; 1211 xs->xs_status = 0; 1212 xs->xs_periph = periph; 1213 xs->xs_retries = SDRETRIES; 1214 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1215 xs->cmd = (struct scsipi_generic *)&cmd; 1216 xs->cmdlen = sizeof(cmd); 1217 xs->resid = nblk * sectorsize; 1218 xs->error = XS_NOERROR; 1219 xs->bp = 0; 1220 xs->data = va; 1221 xs->datalen = nblk * sectorsize; 1222 callout_init(&xs->xs_callout, 0); 1223 1224 /* 1225 * Pass all this info to the scsi driver. 1226 */ 1227 scsipi_adapter_request(chan, ADAPTER_REQ_RUN_XFER, xs); 1228 if ((xs->xs_status & XS_STS_DONE) == 0 || 1229 xs->error != XS_NOERROR) 1230 return (EIO); 1231 #else /* SD_DUMP_NOT_TRUSTED */ 1232 /* Let's just talk about this first... */ 1233 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1234 delay(500 * 1000); /* half a second */ 1235 #endif /* SD_DUMP_NOT_TRUSTED */ 1236 1237 return (0); 1238 } 1239 1240 static int 1241 sd_mode_sense(struct sd_softc *sd, u_int8_t byte2, void *sense, size_t size, 1242 int page, int flags, int *big) 1243 { 1244 1245 if ((sd->sc_periph->periph_quirks & PQUIRK_ONLYBIG) && 1246 !(sd->sc_periph->periph_quirks & PQUIRK_NOBIGMODESENSE)) { 1247 *big = 1; 1248 return scsipi_mode_sense_big(sd->sc_periph, byte2, page, sense, 1249 size + sizeof(struct scsi_mode_parameter_header_10), 1250 flags, SDRETRIES, 6000); 1251 } else { 1252 *big = 0; 1253 return scsipi_mode_sense(sd->sc_periph, byte2, page, sense, 1254 size + sizeof(struct scsi_mode_parameter_header_6), 1255 flags, SDRETRIES, 6000); 1256 } 1257 } 1258 1259 static int 1260 sd_mode_select(struct sd_softc *sd, u_int8_t byte2, void *sense, size_t size, 1261 int flags, int big) 1262 { 1263 1264 if (big) { 1265 struct scsi_mode_parameter_header_10 *header = sense; 1266 1267 _lto2b(0, header->data_length); 1268 return scsipi_mode_select_big(sd->sc_periph, byte2, sense, 1269 size + sizeof(struct scsi_mode_parameter_header_10), 1270 flags, SDRETRIES, 6000); 1271 } else { 1272 struct scsi_mode_parameter_header_6 *header = sense; 1273 1274 header->data_length = 0; 1275 return scsipi_mode_select(sd->sc_periph, byte2, sense, 1276 size + sizeof(struct scsi_mode_parameter_header_6), 1277 flags, SDRETRIES, 6000); 1278 } 1279 } 1280 1281 /* 1282 * sd_validate_blksize: 1283 * 1284 * Validate the block size. Print error if periph is specified, 1285 */ 1286 static int 1287 sd_validate_blksize(struct scsipi_periph *periph, int len) 1288 { 1289 1290 switch (len) { 1291 case 256: 1292 case 512: 1293 case 1024: 1294 case 2048: 1295 case 4096: 1296 return 1; 1297 } 1298 1299 if (periph) { 1300 scsipi_printaddr(periph); 1301 printf("%s sector size: 0x%x. Defaulting to %d bytes.\n", 1302 (len ^ (1 << (ffs(len) - 1))) ? 1303 "preposterous" : "unsupported", 1304 len, SD_DEFAULT_BLKSIZE); 1305 } 1306 1307 return 0; 1308 } 1309 1310 /* 1311 * sd_read_capacity: 1312 * 1313 * Find out from the device what its capacity is. 1314 */ 1315 static u_int64_t 1316 sd_read_capacity(struct scsipi_periph *periph, int *blksize, int flags) 1317 { 1318 union { 1319 struct scsipi_read_capacity_10 cmd; 1320 struct scsipi_read_capacity_16 cmd16; 1321 } cmd; 1322 union { 1323 struct scsipi_read_capacity_10_data data; 1324 struct scsipi_read_capacity_16_data data16; 1325 } *datap; 1326 uint64_t rv; 1327 1328 memset(&cmd, 0, sizeof(cmd)); 1329 cmd.cmd.opcode = READ_CAPACITY_10; 1330 1331 /* 1332 * Don't allocate data buffer on stack; 1333 * The lower driver layer might use the same stack and 1334 * if it uses region which is in the same cacheline, 1335 * cache flush ops against the data buffer won't work properly. 1336 */ 1337 datap = malloc(sizeof(*datap), M_TEMP, M_WAITOK); 1338 if (datap == NULL) 1339 return 0; 1340 1341 /* 1342 * If the command works, interpret the result as a 4 byte 1343 * number of blocks 1344 */ 1345 rv = 0; 1346 memset(datap, 0, sizeof(datap->data)); 1347 if (scsipi_command(periph, (void *)&cmd.cmd, sizeof(cmd.cmd), 1348 (void *)datap, sizeof(datap->data), SCSIPIRETRIES, 20000, NULL, 1349 flags | XS_CTL_DATA_IN | XS_CTL_SILENT) != 0) 1350 goto out; 1351 1352 if (_4btol(datap->data.addr) != 0xffffffff) { 1353 *blksize = _4btol(datap->data.length); 1354 rv = _4btol(datap->data.addr) + 1; 1355 goto out; 1356 } 1357 1358 /* 1359 * Device is larger than can be reflected by READ CAPACITY (10). 1360 * Try READ CAPACITY (16). 1361 */ 1362 1363 memset(&cmd, 0, sizeof(cmd)); 1364 cmd.cmd16.opcode = READ_CAPACITY_16; 1365 cmd.cmd16.byte2 = SRC16_SERVICE_ACTION; 1366 _lto4b(sizeof(datap->data16), cmd.cmd16.len); 1367 1368 memset(datap, 0, sizeof(datap->data16)); 1369 if (scsipi_command(periph, (void *)&cmd.cmd16, sizeof(cmd.cmd16), 1370 (void *)datap, sizeof(datap->data16), SCSIPIRETRIES, 20000, NULL, 1371 flags | XS_CTL_DATA_IN | XS_CTL_SILENT) != 0) 1372 goto out; 1373 1374 *blksize = _4btol(datap->data16.length); 1375 rv = _8btol(datap->data16.addr) + 1; 1376 1377 out: 1378 free(datap, M_TEMP); 1379 return rv; 1380 } 1381 1382 static int 1383 sd_get_simplifiedparms(struct sd_softc *sd, struct disk_parms *dp, int flags) 1384 { 1385 struct { 1386 struct scsi_mode_parameter_header_6 header; 1387 /* no block descriptor */ 1388 u_int8_t pg_code; /* page code (should be 6) */ 1389 u_int8_t pg_length; /* page length (should be 11) */ 1390 u_int8_t wcd; /* bit0: cache disable */ 1391 u_int8_t lbs[2]; /* logical block size */ 1392 u_int8_t size[5]; /* number of log. blocks */ 1393 u_int8_t pp; /* power/performance */ 1394 u_int8_t flags; 1395 u_int8_t resvd; 1396 } scsipi_sense; 1397 u_int64_t blocks; 1398 int error, blksize; 1399 1400 /* 1401 * sd_read_capacity (ie "read capacity") and mode sense page 6 1402 * give the same information. Do both for now, and check 1403 * for consistency. 1404 * XXX probably differs for removable media 1405 */ 1406 dp->blksize = SD_DEFAULT_BLKSIZE; 1407 if ((blocks = sd_read_capacity(sd->sc_periph, &blksize, flags)) == 0) 1408 return (SDGP_RESULT_OFFLINE); /* XXX? */ 1409 1410 error = scsipi_mode_sense(sd->sc_periph, SMS_DBD, 6, 1411 &scsipi_sense.header, sizeof(scsipi_sense), 1412 flags, SDRETRIES, 6000); 1413 1414 if (error != 0) 1415 return (SDGP_RESULT_OFFLINE); /* XXX? */ 1416 1417 dp->blksize = blksize; 1418 if (!sd_validate_blksize(NULL, dp->blksize)) 1419 dp->blksize = _2btol(scsipi_sense.lbs); 1420 if (!sd_validate_blksize(sd->sc_periph, dp->blksize)) 1421 dp->blksize = SD_DEFAULT_BLKSIZE; 1422 1423 /* 1424 * Create a pseudo-geometry. 1425 */ 1426 dp->heads = 64; 1427 dp->sectors = 32; 1428 dp->cyls = blocks / (dp->heads * dp->sectors); 1429 dp->disksize = _5btol(scsipi_sense.size); 1430 if (dp->disksize <= UINT32_MAX && dp->disksize != blocks) { 1431 printf("RBC size: mode sense=%llu, get cap=%llu\n", 1432 (unsigned long long)dp->disksize, 1433 (unsigned long long)blocks); 1434 dp->disksize = blocks; 1435 } 1436 dp->disksize512 = (dp->disksize * dp->blksize) / DEV_BSIZE; 1437 1438 return (SDGP_RESULT_OK); 1439 } 1440 1441 /* 1442 * Get the scsi driver to send a full inquiry to the * device and use the 1443 * results to fill out the disk parameter structure. 1444 */ 1445 static int 1446 sd_get_capacity(struct sd_softc *sd, struct disk_parms *dp, int flags) 1447 { 1448 u_int64_t blocks; 1449 int error, blksize; 1450 #if 0 1451 int i; 1452 u_int8_t *p; 1453 #endif 1454 1455 dp->disksize = blocks = sd_read_capacity(sd->sc_periph, &blksize, 1456 flags); 1457 if (blocks == 0) { 1458 struct scsipi_read_format_capacities cmd; 1459 struct { 1460 struct scsipi_capacity_list_header header; 1461 struct scsipi_capacity_descriptor desc; 1462 } __packed data; 1463 1464 memset(&cmd, 0, sizeof(cmd)); 1465 memset(&data, 0, sizeof(data)); 1466 cmd.opcode = READ_FORMAT_CAPACITIES; 1467 _lto2b(sizeof(data), cmd.length); 1468 1469 error = scsipi_command(sd->sc_periph, 1470 (void *)&cmd, sizeof(cmd), (void *)&data, sizeof(data), 1471 SDRETRIES, 20000, NULL, 1472 flags | XS_CTL_DATA_IN); 1473 if (error == EFTYPE) { 1474 /* Medium Format Corrupted, handle as not formatted */ 1475 return (SDGP_RESULT_UNFORMATTED); 1476 } 1477 if (error || data.header.length == 0) 1478 return (SDGP_RESULT_OFFLINE); 1479 1480 #if 0 1481 printf("rfc: length=%d\n", data.header.length); 1482 printf("rfc result:"); for (i = sizeof(struct scsipi_capacity_list_header) + data.header.length, p = (void *)&data; i; i--, p++) printf(" %02x", *p); printf("\n"); 1483 #endif 1484 switch (data.desc.byte5 & SCSIPI_CAP_DESC_CODE_MASK) { 1485 case SCSIPI_CAP_DESC_CODE_RESERVED: 1486 case SCSIPI_CAP_DESC_CODE_FORMATTED: 1487 break; 1488 1489 case SCSIPI_CAP_DESC_CODE_UNFORMATTED: 1490 return (SDGP_RESULT_UNFORMATTED); 1491 1492 case SCSIPI_CAP_DESC_CODE_NONE: 1493 return (SDGP_RESULT_OFFLINE); 1494 } 1495 1496 dp->disksize = blocks = _4btol(data.desc.nblks); 1497 if (blocks == 0) 1498 return (SDGP_RESULT_OFFLINE); /* XXX? */ 1499 1500 blksize = _3btol(data.desc.blklen); 1501 1502 } else if (!sd_validate_blksize(NULL, blksize)) { 1503 struct sd_mode_sense_data scsipi_sense; 1504 int big, bsize; 1505 struct scsi_general_block_descriptor *bdesc; 1506 1507 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1508 error = sd_mode_sense(sd, 0, &scsipi_sense, 1509 sizeof(scsipi_sense.blk_desc), 0, flags | XS_CTL_SILENT, &big); 1510 if (!error) { 1511 if (big) { 1512 bdesc = (void *)(&scsipi_sense.header.big + 1); 1513 bsize = _2btol(scsipi_sense.header.big.blk_desc_len); 1514 } else { 1515 bdesc = (void *)(&scsipi_sense.header.small + 1); 1516 bsize = scsipi_sense.header.small.blk_desc_len; 1517 } 1518 1519 #if 0 1520 printf("page 0 sense:"); for (i = sizeof(scsipi_sense), p = (void *)&scsipi_sense; i; i--, p++) printf(" %02x", *p); printf("\n"); 1521 printf("page 0 bsize=%d\n", bsize); 1522 printf("page 0 ok\n"); 1523 #endif 1524 1525 if (bsize >= 8) { 1526 blksize = _3btol(bdesc->blklen); 1527 } 1528 } 1529 } 1530 1531 if (!sd_validate_blksize(sd->sc_periph, blksize)) 1532 blksize = SD_DEFAULT_BLKSIZE; 1533 1534 dp->blksize = blksize; 1535 dp->disksize512 = (blocks * dp->blksize) / DEV_BSIZE; 1536 return (0); 1537 } 1538 1539 static int 1540 sd_get_parms_page4(struct sd_softc *sd, struct disk_parms *dp, int flags) 1541 { 1542 struct sd_mode_sense_data scsipi_sense; 1543 int error; 1544 int big, byte2; 1545 size_t poffset; 1546 union scsi_disk_pages *pages; 1547 1548 byte2 = SMS_DBD; 1549 again: 1550 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1551 error = sd_mode_sense(sd, byte2, &scsipi_sense, 1552 (byte2 ? 0 : sizeof(scsipi_sense.blk_desc)) + 1553 sizeof(scsipi_sense.pages.rigid_geometry), 4, 1554 flags | XS_CTL_SILENT, &big); 1555 if (error) { 1556 if (byte2 == SMS_DBD) { 1557 /* No result; try once more with DBD off */ 1558 byte2 = 0; 1559 goto again; 1560 } 1561 return (error); 1562 } 1563 1564 if (big) { 1565 poffset = sizeof scsipi_sense.header.big; 1566 poffset += _2btol(scsipi_sense.header.big.blk_desc_len); 1567 } else { 1568 poffset = sizeof scsipi_sense.header.small; 1569 poffset += scsipi_sense.header.small.blk_desc_len; 1570 } 1571 1572 if (poffset > sizeof(scsipi_sense) - sizeof(pages->rigid_geometry)) 1573 return ERESTART; 1574 1575 pages = (void *)((u_long)&scsipi_sense + poffset); 1576 #if 0 1577 { 1578 size_t i; 1579 u_int8_t *p; 1580 1581 printf("page 4 sense:"); 1582 for (i = sizeof(scsipi_sense), p = (void *)&scsipi_sense; i; 1583 i--, p++) 1584 printf(" %02x", *p); 1585 printf("\n"); 1586 printf("page 4 pg_code=%d sense=%p/%p\n", 1587 pages->rigid_geometry.pg_code, &scsipi_sense, pages); 1588 } 1589 #endif 1590 1591 if ((pages->rigid_geometry.pg_code & PGCODE_MASK) != 4) 1592 return (ERESTART); 1593 1594 SC_DEBUG(sd->sc_periph, SCSIPI_DB3, 1595 ("%d cyls, %d heads, %d precomp, %d red_write, %d land_zone\n", 1596 _3btol(pages->rigid_geometry.ncyl), 1597 pages->rigid_geometry.nheads, 1598 _2btol(pages->rigid_geometry.st_cyl_wp), 1599 _2btol(pages->rigid_geometry.st_cyl_rwc), 1600 _2btol(pages->rigid_geometry.land_zone))); 1601 1602 /* 1603 * KLUDGE!! (for zone recorded disks) 1604 * give a number of sectors so that sec * trks * cyls 1605 * is <= disk_size 1606 * can lead to wasted space! THINK ABOUT THIS ! 1607 */ 1608 dp->heads = pages->rigid_geometry.nheads; 1609 dp->cyls = _3btol(pages->rigid_geometry.ncyl); 1610 if (dp->heads == 0 || dp->cyls == 0) 1611 return (ERESTART); 1612 dp->sectors = dp->disksize / (dp->heads * dp->cyls); /* XXX */ 1613 1614 dp->rot_rate = _2btol(pages->rigid_geometry.rpm); 1615 if (dp->rot_rate == 0) 1616 dp->rot_rate = 3600; 1617 1618 #if 0 1619 printf("page 4 ok\n"); 1620 #endif 1621 return (0); 1622 } 1623 1624 static int 1625 sd_get_parms_page5(struct sd_softc *sd, struct disk_parms *dp, int flags) 1626 { 1627 struct sd_mode_sense_data scsipi_sense; 1628 int error; 1629 int big, byte2; 1630 size_t poffset; 1631 union scsi_disk_pages *pages; 1632 1633 byte2 = SMS_DBD; 1634 again: 1635 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1636 error = sd_mode_sense(sd, 0, &scsipi_sense, 1637 (byte2 ? 0 : sizeof(scsipi_sense.blk_desc)) + 1638 sizeof(scsipi_sense.pages.flex_geometry), 5, 1639 flags | XS_CTL_SILENT, &big); 1640 if (error) { 1641 if (byte2 == SMS_DBD) { 1642 /* No result; try once more with DBD off */ 1643 byte2 = 0; 1644 goto again; 1645 } 1646 return (error); 1647 } 1648 1649 if (big) { 1650 poffset = sizeof scsipi_sense.header.big; 1651 poffset += _2btol(scsipi_sense.header.big.blk_desc_len); 1652 } else { 1653 poffset = sizeof scsipi_sense.header.small; 1654 poffset += scsipi_sense.header.small.blk_desc_len; 1655 } 1656 1657 if (poffset > sizeof(scsipi_sense) - sizeof(pages->flex_geometry)) 1658 return ERESTART; 1659 1660 pages = (void *)((u_long)&scsipi_sense + poffset); 1661 #if 0 1662 { 1663 size_t i; 1664 u_int8_t *p; 1665 1666 printf("page 5 sense:"); 1667 for (i = sizeof(scsipi_sense), p = (void *)&scsipi_sense; i; 1668 i--, p++) 1669 printf(" %02x", *p); 1670 printf("\n"); 1671 printf("page 5 pg_code=%d sense=%p/%p\n", 1672 pages->flex_geometry.pg_code, &scsipi_sense, pages); 1673 } 1674 #endif 1675 1676 if ((pages->flex_geometry.pg_code & PGCODE_MASK) != 5) 1677 return (ERESTART); 1678 1679 SC_DEBUG(sd->sc_periph, SCSIPI_DB3, 1680 ("%d cyls, %d heads, %d sec, %d bytes/sec\n", 1681 _3btol(pages->flex_geometry.ncyl), 1682 pages->flex_geometry.nheads, 1683 pages->flex_geometry.ph_sec_tr, 1684 _2btol(pages->flex_geometry.bytes_s))); 1685 1686 dp->heads = pages->flex_geometry.nheads; 1687 dp->cyls = _2btol(pages->flex_geometry.ncyl); 1688 dp->sectors = pages->flex_geometry.ph_sec_tr; 1689 if (dp->heads == 0 || dp->cyls == 0 || dp->sectors == 0) 1690 return (ERESTART); 1691 1692 dp->rot_rate = _2btol(pages->rigid_geometry.rpm); 1693 if (dp->rot_rate == 0) 1694 dp->rot_rate = 3600; 1695 1696 #if 0 1697 printf("page 5 ok\n"); 1698 #endif 1699 return (0); 1700 } 1701 1702 static int 1703 sd_get_parms(struct sd_softc *sd, struct disk_parms *dp, int flags) 1704 { 1705 struct dk_softc *dksc = &sd->sc_dksc; 1706 int error; 1707 1708 /* 1709 * If offline, the SDEV_MEDIA_LOADED flag will be 1710 * cleared by the caller if necessary. 1711 */ 1712 if (sd->type == T_SIMPLE_DIRECT) { 1713 error = sd_get_simplifiedparms(sd, dp, flags); 1714 if (!error) 1715 goto setprops; 1716 return (error); 1717 } 1718 1719 error = sd_get_capacity(sd, dp, flags); 1720 if (error) 1721 return (error); 1722 1723 if (sd->type == T_OPTICAL) 1724 goto page0; 1725 1726 if (sd->sc_periph->periph_flags & PERIPH_REMOVABLE) { 1727 if (!sd_get_parms_page5(sd, dp, flags) || 1728 !sd_get_parms_page4(sd, dp, flags)) 1729 goto setprops; 1730 } else { 1731 if (!sd_get_parms_page4(sd, dp, flags) || 1732 !sd_get_parms_page5(sd, dp, flags)) 1733 goto setprops; 1734 } 1735 1736 page0: 1737 printf("%s: fabricating a geometry\n", dksc->sc_xname); 1738 /* Try calling driver's method for figuring out geometry. */ 1739 if (!sd->sc_periph->periph_channel->chan_adapter->adapt_getgeom || 1740 !(*sd->sc_periph->periph_channel->chan_adapter->adapt_getgeom) 1741 (sd->sc_periph, dp, dp->disksize)) { 1742 /* 1743 * Use adaptec standard fictitious geometry 1744 * this depends on which controller (e.g. 1542C is 1745 * different. but we have to put SOMETHING here..) 1746 */ 1747 dp->heads = 64; 1748 dp->sectors = 32; 1749 dp->cyls = dp->disksize / (64 * 32); 1750 } 1751 dp->rot_rate = 3600; 1752 1753 setprops: 1754 sd_set_geometry(sd); 1755 1756 return (SDGP_RESULT_OK); 1757 } 1758 1759 static int 1760 sd_flush(struct sd_softc *sd, int flags) 1761 { 1762 struct scsipi_periph *periph = sd->sc_periph; 1763 struct scsi_synchronize_cache_10 cmd; 1764 1765 /* 1766 * If the device is SCSI-2, issue a SYNCHRONIZE CACHE. 1767 * We issue with address 0 length 0, which should be 1768 * interpreted by the device as "all remaining blocks 1769 * starting at address 0". We ignore ILLEGAL REQUEST 1770 * in the event that the command is not supported by 1771 * the device, and poll for completion so that we know 1772 * that the cache has actually been flushed. 1773 * 1774 * Unless, that is, the device can't handle the SYNCHRONIZE CACHE 1775 * command, as indicated by our quirks flags. 1776 * 1777 * XXX What about older devices? 1778 */ 1779 if (periph->periph_version < 2 || 1780 (periph->periph_quirks & PQUIRK_NOSYNCCACHE)) 1781 return (0); 1782 1783 sd->flags |= SDF_FLUSHING; 1784 memset(&cmd, 0, sizeof(cmd)); 1785 cmd.opcode = SCSI_SYNCHRONIZE_CACHE_10; 1786 1787 return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0, 1788 SDRETRIES, 100000, NULL, flags | XS_CTL_IGNORE_ILLEGAL_REQUEST)); 1789 } 1790 1791 static int 1792 sd_getcache(struct sd_softc *sd, int *bitsp) 1793 { 1794 struct scsipi_periph *periph = sd->sc_periph; 1795 struct sd_mode_sense_data scsipi_sense; 1796 int error, bits = 0; 1797 int big; 1798 union scsi_disk_pages *pages; 1799 1800 if (periph->periph_version < 2) 1801 return (EOPNOTSUPP); 1802 1803 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1804 error = sd_mode_sense(sd, SMS_DBD, &scsipi_sense, 1805 sizeof(scsipi_sense.pages.caching_params), 8, 0, &big); 1806 if (error) 1807 return (error); 1808 1809 if (big) 1810 pages = (void *)(&scsipi_sense.header.big + 1); 1811 else 1812 pages = (void *)(&scsipi_sense.header.small + 1); 1813 1814 if ((pages->caching_params.flags & CACHING_RCD) == 0) 1815 bits |= DKCACHE_READ; 1816 if (pages->caching_params.flags & CACHING_WCE) 1817 bits |= DKCACHE_WRITE; 1818 if (pages->caching_params.pg_code & PGCODE_PS) 1819 bits |= DKCACHE_SAVE; 1820 1821 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1822 error = sd_mode_sense(sd, SMS_DBD, &scsipi_sense, 1823 sizeof(scsipi_sense.pages.caching_params), 1824 SMS_PCTRL_CHANGEABLE|8, 0, &big); 1825 if (error == 0) { 1826 if (big) 1827 pages = (void *)(&scsipi_sense.header.big + 1); 1828 else 1829 pages = (void *)(&scsipi_sense.header.small + 1); 1830 1831 if (pages->caching_params.flags & CACHING_RCD) 1832 bits |= DKCACHE_RCHANGE; 1833 if (pages->caching_params.flags & CACHING_WCE) 1834 bits |= DKCACHE_WCHANGE; 1835 } 1836 1837 *bitsp = bits; 1838 1839 return (0); 1840 } 1841 1842 static int 1843 sd_setcache(struct sd_softc *sd, int bits) 1844 { 1845 struct scsipi_periph *periph = sd->sc_periph; 1846 struct sd_mode_sense_data scsipi_sense; 1847 int error; 1848 uint8_t oflags, byte2 = 0; 1849 int big; 1850 union scsi_disk_pages *pages; 1851 1852 if (periph->periph_version < 2) 1853 return (EOPNOTSUPP); 1854 1855 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1856 error = sd_mode_sense(sd, SMS_DBD, &scsipi_sense, 1857 sizeof(scsipi_sense.pages.caching_params), 8, 0, &big); 1858 if (error) 1859 return (error); 1860 1861 if (big) 1862 pages = (void *)(&scsipi_sense.header.big + 1); 1863 else 1864 pages = (void *)(&scsipi_sense.header.small + 1); 1865 1866 oflags = pages->caching_params.flags; 1867 1868 if (bits & DKCACHE_READ) 1869 pages->caching_params.flags &= ~CACHING_RCD; 1870 else 1871 pages->caching_params.flags |= CACHING_RCD; 1872 1873 if (bits & DKCACHE_WRITE) 1874 pages->caching_params.flags |= CACHING_WCE; 1875 else 1876 pages->caching_params.flags &= ~CACHING_WCE; 1877 1878 if (oflags == pages->caching_params.flags) 1879 return (0); 1880 1881 pages->caching_params.pg_code &= PGCODE_MASK; 1882 1883 if (bits & DKCACHE_SAVE) 1884 byte2 |= SMS_SP; 1885 1886 return (sd_mode_select(sd, byte2|SMS_PF, &scsipi_sense, 1887 sizeof(struct scsi_mode_page_header) + 1888 pages->caching_params.pg_length, 0, big)); 1889 } 1890 1891 static void 1892 sd_set_geometry(struct sd_softc *sd) 1893 { 1894 struct dk_softc *dksc = &sd->sc_dksc; 1895 struct disk_geom *dg = &dksc->sc_dkdev.dk_geom; 1896 1897 memset(dg, 0, sizeof(*dg)); 1898 1899 dg->dg_secperunit = sd->params.disksize; 1900 dg->dg_secsize = sd->params.blksize; 1901 dg->dg_nsectors = sd->params.sectors; 1902 dg->dg_ntracks = sd->params.heads; 1903 dg->dg_ncylinders = sd->params.cyls; 1904 1905 disk_set_info(dksc->sc_dev, &dksc->sc_dkdev, NULL); 1906 } 1907
Indexes created Mon Sep 22 21:09:42 GMT 2025