sd.c revision 1.317.2.4
1 /* $NetBSD: sd.c,v 1.317.2.4 2017/01/07 08:56:41 pgoyette 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 1.317.2.4 2017/01/07 08:56:41 pgoyette 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 DEVSW_MODULE_INIT 164 .d_open = sdopen, 165 .d_close = sdclose, 166 .d_strategy = sdstrategy, 167 .d_ioctl = sdioctl, 168 .d_dump = sddump, 169 .d_psize = sdsize, 170 .d_discard = nodiscard, 171 .d_flag = D_DISK | D_MPSAFE 172 }; 173 174 const struct cdevsw sd_cdevsw = { 175 DEVSW_MODULE_INIT 176 .d_open = sdopen, 177 .d_close = sdclose, 178 .d_read = sdread, 179 .d_write = sdwrite, 180 .d_ioctl = sdioctl, 181 .d_stop = nostop, 182 .d_tty = notty, 183 .d_poll = nopoll, 184 .d_mmap = nommap, 185 .d_kqfilter = nokqfilter, 186 .d_discard = nodiscard, 187 .d_flag = D_DISK | D_MPSAFE 188 }; 189 190 static struct dkdriver sddkdriver = { 191 .d_open = sdopen, 192 .d_close = sdclose, 193 .d_strategy = sdstrategy, 194 .d_minphys = sdminphys, 195 .d_diskstart = sd_diskstart, 196 .d_dumpblocks = sd_dumpblocks, 197 .d_iosize = sd_iosize, 198 .d_firstopen = sd_firstopen, 199 .d_lastclose = sd_lastclose, 200 .d_label = sd_label, 201 }; 202 203 static const struct scsipi_periphsw sd_switch = { 204 sd_interpret_sense, /* check our error handler first */ 205 sdstart, /* have a queue, served by this */ 206 NULL, /* have no async handler */ 207 sddone, /* deal with stats at interrupt time */ 208 }; 209 210 struct sd_mode_sense_data { 211 /* 212 * XXX 213 * We are not going to parse this as-is -- it just has to be large 214 * enough. 215 */ 216 union { 217 struct scsi_mode_parameter_header_6 small; 218 struct scsi_mode_parameter_header_10 big; 219 } header; 220 struct scsi_general_block_descriptor blk_desc; 221 union scsi_disk_pages pages; 222 }; 223 224 /* 225 * The routine called by the low level scsi routine when it discovers 226 * A device suitable for this driver 227 */ 228 static int 229 sdmatch(device_t parent, cfdata_t match, 230 void *aux) 231 { 232 struct scsipibus_attach_args *sa = aux; 233 int priority; 234 235 (void)scsipi_inqmatch(&sa->sa_inqbuf, 236 sd_patterns, sizeof(sd_patterns) / sizeof(sd_patterns[0]), 237 sizeof(sd_patterns[0]), &priority); 238 239 return (priority); 240 } 241 242 /* 243 * Attach routine common to atapi & scsi. 244 */ 245 static void 246 sdattach(device_t parent, device_t self, void *aux) 247 { 248 struct sd_softc *sd = device_private(self); 249 struct dk_softc *dksc = &sd->sc_dksc; 250 struct scsipibus_attach_args *sa = aux; 251 struct scsipi_periph *periph = sa->sa_periph; 252 int error, result, dtype; 253 struct disk_parms *dp = &sd->params; 254 char pbuf[9]; 255 256 SC_DEBUG(periph, SCSIPI_DB2, ("sdattach: ")); 257 258 sd->type = (sa->sa_inqbuf.type & SID_TYPE); 259 strncpy(sd->name, sa->sa_inqbuf.product, sizeof(sd->name)); 260 261 if (sd->type == T_SIMPLE_DIRECT) 262 periph->periph_quirks |= PQUIRK_ONLYBIG | PQUIRK_NOBIGMODESENSE; 263 264 switch (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(sa->sa_periph))) { 265 case SCSIPI_BUSTYPE_SCSI: 266 dtype = DKTYPE_SCSI; 267 if (periph->periph_version == 0) 268 sd->flags |= SDF_ANCIENT; 269 break; 270 case SCSIPI_BUSTYPE_ATAPI: 271 dtype = DKTYPE_ATAPI; 272 break; 273 default: 274 dtype = DKTYPE_UNKNOWN; 275 break; 276 } 277 278 /* Initialize dk and disk structure. */ 279 dk_init(dksc, self, dtype); 280 disk_init(&dksc->sc_dkdev, dksc->sc_xname, &sddkdriver); 281 282 /* Attach dk and disk subsystems */ 283 dk_attach(dksc); 284 disk_attach(&dksc->sc_dkdev); 285 286 bufq_alloc(&dksc->sc_bufq, BUFQ_DISK_DEFAULT_STRAT, BUFQ_SORT_RAWBLOCK); 287 288 callout_init(&sd->sc_callout, 0); 289 290 /* 291 * Store information needed to contact our base driver 292 */ 293 sd->sc_periph = periph; 294 295 periph->periph_dev = dksc->sc_dev; 296 periph->periph_switch = &sd_switch; 297 298 /* 299 * Increase our openings to the maximum-per-periph 300 * supported by the adapter. This will either be 301 * clamped down or grown by the adapter if necessary. 302 */ 303 periph->periph_openings = 304 SCSIPI_CHAN_MAX_PERIPH(periph->periph_channel); 305 periph->periph_flags |= PERIPH_GROW_OPENINGS; 306 307 /* 308 * Use the subdriver to request information regarding the drive. 309 */ 310 aprint_naive("\n"); 311 aprint_normal("\n"); 312 313 if (periph->periph_quirks & PQUIRK_START) 314 (void)scsipi_start(periph, SSS_START, XS_CTL_SILENT); 315 316 error = scsipi_test_unit_ready(periph, 317 XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST | 318 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT_NODEV); 319 if (error) 320 result = SDGP_RESULT_OFFLINE; 321 else 322 result = sd_get_parms(sd, &sd->params, XS_CTL_DISCOVERY); 323 324 aprint_normal_dev(dksc->sc_dev, ""); 325 switch (result) { 326 case SDGP_RESULT_OK: 327 format_bytes(pbuf, sizeof(pbuf), 328 (u_int64_t)dp->disksize * dp->blksize); 329 aprint_normal( 330 "%s, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %llu sectors", 331 pbuf, dp->cyls, dp->heads, dp->sectors, dp->blksize, 332 (unsigned long long)dp->disksize); 333 break; 334 335 case SDGP_RESULT_OFFLINE: 336 aprint_normal("drive offline"); 337 break; 338 339 case SDGP_RESULT_UNFORMATTED: 340 aprint_normal("unformatted media"); 341 break; 342 343 #ifdef DIAGNOSTIC 344 default: 345 panic("sdattach: unknown result from get_parms"); 346 break; 347 #endif 348 } 349 aprint_normal("\n"); 350 351 /* Discover wedges on this disk. */ 352 dkwedge_discover(&dksc->sc_dkdev); 353 354 /* 355 * Establish a shutdown hook so that we can ensure that 356 * our data has actually made it onto the platter at 357 * shutdown time. Note that this relies on the fact 358 * that the shutdown hooks at the "leaves" of the device tree 359 * are run, first (thus guaranteeing that our hook runs before 360 * our ancestors'). 361 */ 362 if (!pmf_device_register1(self, sd_suspend, NULL, sd_shutdown)) 363 aprint_error_dev(self, "couldn't establish power handler\n"); 364 } 365 366 static int 367 sddetach(device_t self, int flags) 368 { 369 struct sd_softc *sd = device_private(self); 370 struct dk_softc *dksc = &sd->sc_dksc; 371 struct scsipi_periph *periph = sd->sc_periph; 372 struct scsipi_channel *chan = periph->periph_channel; 373 int bmaj, cmaj, i, mn, rc; 374 375 if ((rc = disk_begindetach(&dksc->sc_dkdev, sd_lastclose, self, flags)) != 0) 376 return rc; 377 378 /* locate the major number */ 379 bmaj = bdevsw_lookup_major(&sd_bdevsw); 380 cmaj = cdevsw_lookup_major(&sd_cdevsw); 381 382 /* Nuke the vnodes for any open instances */ 383 for (i = 0; i < MAXPARTITIONS; i++) { 384 mn = SDMINOR(device_unit(self), i); 385 vdevgone(bmaj, mn, mn, VBLK); 386 vdevgone(cmaj, mn, mn, VCHR); 387 } 388 389 /* kill any pending restart */ 390 callout_stop(&sd->sc_callout); 391 392 dk_drain(dksc); 393 394 /* Kill off any pending commands. */ 395 mutex_enter(chan_mtx(chan)); 396 scsipi_kill_pending(periph); 397 mutex_exit(chan_mtx(chan)); 398 399 bufq_free(dksc->sc_bufq); 400 401 /* Delete all of our wedges. */ 402 dkwedge_delall(&dksc->sc_dkdev); 403 404 /* Detach from the disk list. */ 405 disk_detach(&dksc->sc_dkdev); 406 disk_destroy(&dksc->sc_dkdev); 407 408 dk_detach(dksc); 409 410 callout_destroy(&sd->sc_callout); 411 412 pmf_device_deregister(self); 413 414 return (0); 415 } 416 417 /* 418 * Serialized by caller 419 */ 420 static int 421 sd_firstopen(device_t self, dev_t dev, int flag, int fmt) 422 { 423 struct sd_softc *sd = device_private(self); 424 struct scsipi_periph *periph = sd->sc_periph; 425 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 426 int error, silent; 427 int part, removable; 428 429 part = SDPART(dev); 430 431 error = scsipi_adapter_addref(adapt); 432 if (error) 433 return error; 434 435 if ((part == RAW_PART && fmt == S_IFCHR) || (flag & FSILENT)) 436 silent = XS_CTL_SILENT; 437 else 438 silent = 0; 439 440 /* Check that it is still responding and ok. */ 441 error = scsipi_test_unit_ready(periph, 442 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE | 443 silent); 444 445 /* 446 * Start the pack spinning if necessary. Always allow the 447 * raw parition to be opened, for raw IOCTLs. Data transfers 448 * will check for SDEV_MEDIA_LOADED. 449 */ 450 if (error == EIO) { 451 error = scsipi_start(periph, SSS_START, silent); 452 if (error == EINVAL) 453 error = EIO; 454 } 455 if (error) 456 goto bad; 457 458 removable = (periph->periph_flags & PERIPH_REMOVABLE) != 0; 459 if (removable) { 460 /* Lock the pack in. */ 461 error = scsipi_prevent(periph, SPAMR_PREVENT_DT, 462 XS_CTL_IGNORE_ILLEGAL_REQUEST | 463 XS_CTL_IGNORE_MEDIA_CHANGE | 464 XS_CTL_SILENT); 465 if (error) 466 goto bad; 467 } 468 469 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 470 int param_error; 471 472 /* 473 * Load the physical device parameters. 474 * 475 * Note that if media is present but unformatted, 476 * we allow the open (so that it can be formatted!). 477 * The drive should refuse real I/O, if the media is 478 * unformatted. 479 */ 480 param_error = sd_get_parms(sd, &sd->params, 0); 481 if (param_error == SDGP_RESULT_OFFLINE) { 482 error = ENXIO; 483 goto bad2; 484 } 485 periph->periph_flags |= PERIPH_MEDIA_LOADED; 486 487 SC_DEBUG(periph, SCSIPI_DB3, ("Params loaded ")); 488 } 489 490 periph->periph_flags |= PERIPH_OPEN; 491 return 0; 492 493 bad2: 494 if (removable) 495 scsipi_prevent(periph, SPAMR_ALLOW, 496 XS_CTL_IGNORE_ILLEGAL_REQUEST | 497 XS_CTL_IGNORE_MEDIA_CHANGE | 498 XS_CTL_SILENT); 499 500 bad: 501 scsipi_adapter_delref(adapt); 502 return error; 503 } 504 505 /* 506 * open the device. Make sure the partition info is a up-to-date as can be. 507 */ 508 static int 509 sdopen(dev_t dev, int flag, int fmt, struct lwp *l) 510 { 511 struct sd_softc *sd; 512 struct dk_softc *dksc; 513 struct scsipi_periph *periph; 514 int unit, part; 515 int error; 516 517 unit = SDUNIT(dev); 518 sd = device_lookup_private(&sd_cd, unit); 519 if (sd == NULL) 520 return (ENXIO); 521 dksc = &sd->sc_dksc; 522 523 if (!device_is_active(dksc->sc_dev)) 524 return (ENODEV); 525 526 periph = sd->sc_periph; 527 part = SDPART(dev); 528 529 SC_DEBUG(periph, SCSIPI_DB1, 530 ("sdopen: dev=0x%"PRIx64" (unit %d (of %d), partition %d)\n", 531 dev, unit, sd_cd.cd_ndevs, SDPART(dev))); 532 533 /* 534 * If any partition is open, but the disk has been invalidated, 535 * disallow further opens of non-raw partition 536 */ 537 if ((periph->periph_flags & (PERIPH_OPEN | PERIPH_MEDIA_LOADED)) == 538 PERIPH_OPEN) { 539 if (part != RAW_PART || fmt != S_IFCHR) 540 return EIO; 541 } 542 543 error = dk_open(dksc, dev, flag, fmt, l); 544 545 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 546 547 return error; 548 } 549 550 /* 551 * Serialized by caller 552 */ 553 static int 554 sd_lastclose(device_t self) 555 { 556 struct sd_softc *sd = device_private(self); 557 struct dk_softc *dksc = &sd->sc_dksc; 558 struct scsipi_periph *periph = sd->sc_periph; 559 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 560 561 /* 562 * If the disk cache needs flushing, and the disk supports 563 * it, do it now. 564 */ 565 if ((sd->flags & SDF_DIRTY) != 0) { 566 if (sd_flush(sd, 0)) { 567 aprint_error_dev(dksc->sc_dev, 568 "cache synchronization failed\n"); 569 sd->flags &= ~SDF_FLUSHING; 570 } else 571 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 572 } 573 574 scsipi_wait_drain(periph); 575 576 if (periph->periph_flags & PERIPH_REMOVABLE) 577 scsipi_prevent(periph, SPAMR_ALLOW, 578 XS_CTL_IGNORE_ILLEGAL_REQUEST | 579 XS_CTL_IGNORE_NOT_READY | 580 XS_CTL_SILENT); 581 periph->periph_flags &= ~PERIPH_OPEN; 582 583 scsipi_wait_drain(periph); 584 585 scsipi_adapter_delref(adapt); 586 587 return 0; 588 } 589 590 /* 591 * close the device.. only called if we are the LAST occurence of an open 592 * device. Convenient now but usually a pain. 593 */ 594 static int 595 sdclose(dev_t dev, int flag, int fmt, struct lwp *l) 596 { 597 struct sd_softc *sd; 598 struct dk_softc *dksc; 599 int unit; 600 601 unit = SDUNIT(dev); 602 sd = device_lookup_private(&sd_cd, unit); 603 dksc = &sd->sc_dksc; 604 605 return dk_close(dksc, dev, flag, fmt, l); 606 } 607 608 /* 609 * Actually translate the requested transfer into one the physical driver 610 * can understand. The transfer is described by a buf and will include 611 * only one physical transfer. 612 */ 613 static void 614 sdstrategy(struct buf *bp) 615 { 616 struct sd_softc *sd = device_lookup_private(&sd_cd, SDUNIT(bp->b_dev)); 617 struct dk_softc *dksc = &sd->sc_dksc; 618 struct scsipi_periph *periph = sd->sc_periph; 619 620 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdstrategy ")); 621 SC_DEBUG(sd->sc_periph, SCSIPI_DB1, 622 ("%d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 623 624 /* 625 * If the device has been made invalid, error out 626 */ 627 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 || 628 !device_is_active(dksc->sc_dev)) { 629 if (periph->periph_flags & PERIPH_OPEN) 630 bp->b_error = EIO; 631 else 632 bp->b_error = ENODEV; 633 634 bp->b_resid = bp->b_bcount; 635 biodone(bp); 636 return; 637 } 638 639 dk_strategy(dksc, bp); 640 } 641 642 /* 643 * Issue single I/O command 644 * 645 * Called from dk_start and implicitely from dk_strategy 646 */ 647 static int 648 sd_diskstart(device_t dev, struct buf *bp) 649 { 650 struct sd_softc *sd = device_private(dev); 651 struct scsipi_periph *periph = sd->sc_periph; 652 struct scsipi_channel *chan = periph->periph_channel; 653 struct scsipi_rw_16 cmd16; 654 struct scsipi_rw_10 cmd_big; 655 struct scsi_rw_6 cmd_small; 656 struct scsipi_generic *cmdp; 657 struct scsipi_xfer *xs; 658 int error, flags, nblks, cmdlen; 659 660 mutex_enter(chan_mtx(chan)); 661 662 if (periph->periph_active >= periph->periph_openings) { 663 error = EAGAIN; 664 goto out; 665 } 666 667 /* 668 * there is excess capacity, but a special waits 669 * It'll need the adapter as soon as we clear out of the 670 * way and let it run (user level wait). 671 */ 672 if (periph->periph_flags & PERIPH_WAITING) { 673 periph->periph_flags &= ~PERIPH_WAITING; 674 cv_broadcast(periph_cv_periph(periph)); 675 error = EAGAIN; 676 goto out; 677 } 678 679 /* 680 * If the device has become invalid, abort all the 681 * reads and writes until all files have been closed and 682 * re-opened 683 */ 684 if (__predict_false( 685 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 686 error = EIO; 687 goto out; 688 } 689 690 /* 691 * Mark the disk dirty so that the cache will be 692 * flushed on close. 693 */ 694 if ((bp->b_flags & B_READ) == 0) 695 sd->flags |= SDF_DIRTY; 696 697 if (sd->params.blksize == DEV_BSIZE) 698 nblks = bp->b_bcount >> DEV_BSHIFT; 699 else 700 nblks = howmany(bp->b_bcount, sd->params.blksize); 701 702 /* 703 * Fill out the scsi command. Use the smallest CDB possible 704 * (6-byte, 10-byte, or 16-byte). 705 */ 706 if (((bp->b_rawblkno & 0x1fffff) == bp->b_rawblkno) && 707 ((nblks & 0xff) == nblks) && 708 !(periph->periph_quirks & PQUIRK_ONLYBIG)) { 709 /* 6-byte CDB */ 710 memset(&cmd_small, 0, sizeof(cmd_small)); 711 cmd_small.opcode = (bp->b_flags & B_READ) ? 712 SCSI_READ_6_COMMAND : SCSI_WRITE_6_COMMAND; 713 _lto3b(bp->b_rawblkno, cmd_small.addr); 714 cmd_small.length = nblks & 0xff; 715 cmdlen = sizeof(cmd_small); 716 cmdp = (struct scsipi_generic *)&cmd_small; 717 } else if ((bp->b_rawblkno & 0xffffffff) == bp->b_rawblkno) { 718 /* 10-byte CDB */ 719 memset(&cmd_big, 0, sizeof(cmd_big)); 720 cmd_big.opcode = (bp->b_flags & B_READ) ? 721 READ_10 : WRITE_10; 722 _lto4b(bp->b_rawblkno, cmd_big.addr); 723 _lto2b(nblks, cmd_big.length); 724 cmdlen = sizeof(cmd_big); 725 cmdp = (struct scsipi_generic *)&cmd_big; 726 } else { 727 /* 16-byte CDB */ 728 memset(&cmd16, 0, sizeof(cmd16)); 729 cmd16.opcode = (bp->b_flags & B_READ) ? 730 READ_16 : WRITE_16; 731 _lto8b(bp->b_rawblkno, cmd16.addr); 732 _lto4b(nblks, cmd16.length); 733 cmdlen = sizeof(cmd16); 734 cmdp = (struct scsipi_generic *)&cmd16; 735 } 736 737 /* 738 * Figure out what flags to use. 739 */ 740 flags = XS_CTL_NOSLEEP|XS_CTL_ASYNC|XS_CTL_SIMPLE_TAG; 741 if (bp->b_flags & B_READ) 742 flags |= XS_CTL_DATA_IN; 743 else 744 flags |= XS_CTL_DATA_OUT; 745 746 /* 747 * Call the routine that chats with the adapter. 748 * Note: we cannot sleep as we may be an interrupt 749 */ 750 xs = scsipi_make_xs_locked(periph, cmdp, cmdlen, 751 (u_char *)bp->b_data, bp->b_bcount, 752 SDRETRIES, SD_IO_TIMEOUT, bp, flags); 753 if (__predict_false(xs == NULL)) { 754 /* 755 * out of memory. Keep this buffer in the queue, and 756 * retry later. 757 */ 758 callout_reset(&sd->sc_callout, hz / 2, sdrestart, sd); 759 error = EAGAIN; 760 goto out; 761 } 762 763 error = scsipi_execute_xs(xs); 764 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 765 KASSERT(error == 0); 766 767 out: 768 mutex_exit(chan_mtx(chan)); 769 770 return error; 771 } 772 773 /* 774 * Recover I/O request after memory shortage 775 * 776 * Called from callout 777 */ 778 static void 779 sdrestart(void *v) 780 { 781 struct sd_softc *sd = v; 782 struct dk_softc *dksc = &sd->sc_dksc; 783 784 dk_start(dksc, NULL); 785 } 786 787 /* 788 * Recover I/O request after memory shortage 789 * 790 * Called from scsipi midlayer when resources have been freed 791 * with channel lock held 792 */ 793 static void 794 sdstart(struct scsipi_periph *periph) 795 { 796 struct sd_softc *sd = device_private(periph->periph_dev); 797 struct dk_softc *dksc = &sd->sc_dksc; 798 struct scsipi_channel *chan = periph->periph_channel; 799 800 /* 801 * release channel lock as dk_start may need to acquire 802 * other locks 803 * 804 * sdstart is called from scsipi_put_xs and all its callers 805 * release the lock afterwards. So releasing it here 806 * doesn't matter. 807 */ 808 mutex_exit(chan_mtx(chan)); 809 810 dk_start(dksc, NULL); 811 812 mutex_enter(chan_mtx(chan)); 813 } 814 815 static void 816 sddone(struct scsipi_xfer *xs, int error) 817 { 818 struct sd_softc *sd = device_private(xs->xs_periph->periph_dev); 819 struct dk_softc *dksc = &sd->sc_dksc; 820 struct buf *bp = xs->bp; 821 822 if (sd->flags & SDF_FLUSHING) { 823 /* Flush completed, no longer dirty. */ 824 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 825 } 826 827 if (bp) { 828 bp->b_error = error; 829 bp->b_resid = xs->resid; 830 if (error) { 831 /* on a read/write error bp->b_resid is zero, so fix */ 832 bp->b_resid = bp->b_bcount; 833 } 834 835 dk_done(dksc, bp); 836 /* dk_start is called from scsipi_complete */ 837 } 838 } 839 840 static void 841 sdminphys(struct buf *bp) 842 { 843 struct sd_softc *sd = device_lookup_private(&sd_cd, SDUNIT(bp->b_dev)); 844 struct dk_softc *dksc = &sd->sc_dksc; 845 long xmax; 846 847 /* 848 * If the device is ancient, we want to make sure that 849 * the transfer fits into a 6-byte cdb. 850 * 851 * XXX Note that the SCSI-I spec says that 256-block transfers 852 * are allowed in a 6-byte read/write, and are specified 853 * by settng the "length" to 0. However, we're conservative 854 * here, allowing only 255-block transfers in case an 855 * ancient device gets confused by length == 0. A length of 0 856 * in a 10-byte read/write actually means 0 blocks. 857 */ 858 if ((sd->flags & SDF_ANCIENT) && 859 ((sd->sc_periph->periph_flags & 860 (PERIPH_REMOVABLE | PERIPH_MEDIA_LOADED)) != PERIPH_REMOVABLE)) { 861 xmax = dksc->sc_dkdev.dk_geom.dg_secsize * 0xff; 862 863 if (bp->b_bcount > xmax) 864 bp->b_bcount = xmax; 865 } 866 867 scsipi_adapter_minphys(sd->sc_periph->periph_channel, bp); 868 } 869 870 static void 871 sd_iosize(device_t dev, int *count) 872 { 873 struct buf B; 874 int bmaj; 875 876 bmaj = bdevsw_lookup_major(&sd_bdevsw); 877 B.b_dev = MAKESDDEV(bmaj,device_unit(dev),RAW_PART); 878 B.b_bcount = *count; 879 880 sdminphys(&B); 881 882 *count = B.b_bcount; 883 } 884 885 static int 886 sdread(dev_t dev, struct uio *uio, int ioflag) 887 { 888 889 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 890 } 891 892 static int 893 sdwrite(dev_t dev, struct uio *uio, int ioflag) 894 { 895 896 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 897 } 898 899 /* 900 * Perform special action on behalf of the user 901 * Knows about the internals of this device 902 */ 903 static int 904 sdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 905 { 906 struct sd_softc *sd = device_lookup_private(&sd_cd, SDUNIT(dev)); 907 struct dk_softc *dksc = &sd->sc_dksc; 908 struct scsipi_periph *periph = sd->sc_periph; 909 910 int part = SDPART(dev); 911 int error; 912 913 SC_DEBUG(sd->sc_periph, SCSIPI_DB2, ("sdioctl 0x%lx ", cmd)); 914 915 /* 916 * If the device is not valid, some IOCTLs can still be 917 * handled on the raw partition. Check this here. 918 */ 919 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0 && 920 part != RAW_PART) 921 return (EIO); 922 923 switch (cmd) { 924 case DIOCLOCK: 925 if (periph->periph_flags & PERIPH_REMOVABLE) 926 return (scsipi_prevent(periph, 927 (*(int *)addr) ? 928 SPAMR_PREVENT_DT : SPAMR_ALLOW, 0)); 929 else 930 return (ENOTTY); 931 932 case DIOCEJECT: 933 if ((periph->periph_flags & PERIPH_REMOVABLE) == 0) 934 return (ENOTTY); 935 if (*(int *)addr == 0) { 936 /* 937 * Don't force eject: check that we are the only 938 * partition open. If so, unlock it. 939 */ 940 if (DK_BUSY(dksc, part) == 0) { 941 error = scsipi_prevent(periph, SPAMR_ALLOW, 942 XS_CTL_IGNORE_NOT_READY); 943 if (error) 944 return (error); 945 } else { 946 return (EBUSY); 947 } 948 } 949 /* FALLTHROUGH */ 950 case ODIOCEJECT: 951 return ((periph->periph_flags & PERIPH_REMOVABLE) == 0 ? 952 ENOTTY : scsipi_start(periph, SSS_STOP|SSS_LOEJ, 0)); 953 954 case DIOCGCACHE: 955 return (sd_getcache(sd, (int *) addr)); 956 957 case DIOCSCACHE: 958 if ((flag & FWRITE) == 0) 959 return (EBADF); 960 return (sd_setcache(sd, *(int *) addr)); 961 962 case DIOCCACHESYNC: 963 /* 964 * XXX Do we really need to care about having a writable 965 * file descriptor here? 966 */ 967 if ((flag & FWRITE) == 0) 968 return (EBADF); 969 if (((sd->flags & SDF_DIRTY) != 0 || *(int *)addr != 0)) { 970 error = sd_flush(sd, 0); 971 if (error) { 972 sd->flags &= ~SDF_FLUSHING; 973 return (error); 974 } 975 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 976 } 977 return (0); 978 979 default: 980 error = dk_ioctl(dksc, dev, cmd, addr, flag, l); 981 if (error == ENOTTY) 982 error = scsipi_do_ioctl(periph, dev, cmd, addr, flag, l); 983 return (error); 984 } 985 986 #ifdef DIAGNOSTIC 987 panic("sdioctl: impossible"); 988 #endif 989 } 990 991 static void 992 sd_label(device_t self, struct disklabel *lp) 993 { 994 struct sd_softc *sd = device_private(self); 995 996 strncpy(lp->d_typename, sd->name, 16); 997 lp->d_rpm = sd->params.rot_rate; 998 if (sd->sc_periph->periph_flags & PERIPH_REMOVABLE) 999 lp->d_flags |= D_REMOVABLE; 1000 } 1001 1002 static bool 1003 sd_shutdown(device_t self, int how) 1004 { 1005 struct sd_softc *sd = device_private(self); 1006 struct dk_softc *dksc = &sd->sc_dksc; 1007 1008 /* 1009 * If the disk cache needs to be flushed, and the disk supports 1010 * it, flush it. We're cold at this point, so we poll for 1011 * completion. 1012 */ 1013 if ((sd->flags & SDF_DIRTY) != 0) { 1014 if (sd_flush(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1015 aprint_error_dev(dksc->sc_dev, 1016 "cache synchronization failed\n"); 1017 sd->flags &= ~SDF_FLUSHING; 1018 } else 1019 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1020 } 1021 return true; 1022 } 1023 1024 static bool 1025 sd_suspend(device_t dv, const pmf_qual_t *qual) 1026 { 1027 return sd_shutdown(dv, boothowto); /* XXX no need to poll */ 1028 } 1029 1030 /* 1031 * Check Errors 1032 */ 1033 static int 1034 sd_interpret_sense(struct scsipi_xfer *xs) 1035 { 1036 struct scsipi_periph *periph = xs->xs_periph; 1037 struct scsipi_channel *chan = periph->periph_channel; 1038 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 1039 struct sd_softc *sd = device_private(periph->periph_dev); 1040 struct dk_softc *dksc = &sd->sc_dksc; 1041 int error, retval = EJUSTRETURN; 1042 1043 /* 1044 * If the periph is already recovering, just do the normal 1045 * error processing. 1046 */ 1047 if (periph->periph_flags & PERIPH_RECOVERING) 1048 return (retval); 1049 1050 /* 1051 * Ignore errors from accessing illegal fields (e.g. trying to 1052 * lock the door of a digicam, which doesn't have a door that 1053 * can be locked) for the SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL command. 1054 */ 1055 if (xs->cmd->opcode == SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL && 1056 SSD_SENSE_KEY(sense->flags) == SKEY_ILLEGAL_REQUEST && 1057 sense->asc == 0x24 && 1058 sense->ascq == 0x00) { /* Illegal field in CDB */ 1059 if (!(xs->xs_control & XS_CTL_SILENT)) { 1060 scsipi_printaddr(periph); 1061 printf("no door lock\n"); 1062 } 1063 xs->xs_control |= XS_CTL_IGNORE_ILLEGAL_REQUEST; 1064 return (retval); 1065 } 1066 1067 1068 1069 /* 1070 * If the device is not open yet, let the generic code handle it. 1071 */ 1072 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1073 return (retval); 1074 1075 /* 1076 * If it isn't a extended or extended/deferred error, let 1077 * the generic code handle it. 1078 */ 1079 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 1080 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 1081 return (retval); 1082 1083 if (SSD_SENSE_KEY(sense->flags) == SKEY_NOT_READY && 1084 sense->asc == 0x4) { 1085 if (sense->ascq == 0x01) { 1086 /* 1087 * Unit In The Process Of Becoming Ready. 1088 */ 1089 printf("%s: waiting for pack to spin up...\n", 1090 dksc->sc_xname); 1091 if (!callout_pending(&periph->periph_callout)) 1092 scsipi_periph_freeze(periph, 1); 1093 callout_reset(&periph->periph_callout, 1094 5 * hz, scsipi_periph_timed_thaw, periph); 1095 retval = ERESTART; 1096 } else if (sense->ascq == 0x02) { 1097 printf("%s: pack is stopped, restarting...\n", 1098 dksc->sc_xname); 1099 mutex_enter(chan_mtx(chan)); 1100 periph->periph_flags |= PERIPH_RECOVERING; 1101 mutex_exit(chan_mtx(chan)); 1102 error = scsipi_start(periph, SSS_START, 1103 XS_CTL_URGENT|XS_CTL_HEAD_TAG| 1104 XS_CTL_THAW_PERIPH|XS_CTL_FREEZE_PERIPH); 1105 if (error) { 1106 aprint_error_dev(dksc->sc_dev, 1107 "unable to restart pack\n"); 1108 retval = error; 1109 } else 1110 retval = ERESTART; 1111 mutex_enter(chan_mtx(chan)); 1112 periph->periph_flags &= ~PERIPH_RECOVERING; 1113 mutex_exit(chan_mtx(chan)); 1114 } 1115 } 1116 if (SSD_SENSE_KEY(sense->flags) == SKEY_MEDIUM_ERROR && 1117 sense->asc == 0x31 && 1118 sense->ascq == 0x00) { /* maybe for any asq ? */ 1119 /* Medium Format Corrupted */ 1120 retval = EFTYPE; 1121 } 1122 return (retval); 1123 } 1124 1125 1126 static int 1127 sdsize(dev_t dev) 1128 { 1129 struct sd_softc *sd; 1130 struct dk_softc *dksc; 1131 int unit; 1132 1133 unit = SDUNIT(dev); 1134 sd = device_lookup_private(&sd_cd, unit); 1135 if (sd == NULL) 1136 return (-1); 1137 dksc = &sd->sc_dksc; 1138 1139 if (!device_is_active(dksc->sc_dev)) 1140 return (-1); 1141 1142 return dk_size(dksc, dev); 1143 } 1144 1145 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1146 static struct scsipi_xfer sx; 1147 1148 /* 1149 * dump all of physical memory into the partition specified, starting 1150 * at offset 'dumplo' into the partition. 1151 */ 1152 static int 1153 sddump(dev_t dev, daddr_t blkno, void *va, size_t size) 1154 { 1155 struct sd_softc *sd; 1156 struct dk_softc *dksc; 1157 struct scsipi_periph *periph; 1158 int unit; 1159 1160 unit = SDUNIT(dev); 1161 if ((sd = device_lookup_private(&sd_cd, unit)) == NULL) 1162 return (ENXIO); 1163 dksc = &sd->sc_dksc; 1164 1165 if (!device_is_active(dksc->sc_dev)) 1166 return (ENODEV); 1167 1168 periph = sd->sc_periph; 1169 1170 /* Make sure it was initialized. */ 1171 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1172 return (ENXIO); 1173 1174 return dk_dump(dksc, dev, blkno, va, size); 1175 } 1176 1177 static int 1178 sd_dumpblocks(device_t dev, void *va, daddr_t blkno, int nblk) 1179 { 1180 struct sd_softc *sd = device_private(dev); 1181 struct dk_softc *dksc = &sd->sc_dksc; 1182 struct disk_geom *dg = &dksc->sc_dkdev.dk_geom; 1183 struct scsipi_rw_10 cmd; /* write command */ 1184 struct scsipi_xfer *xs; /* ... convenience */ 1185 struct scsipi_periph *periph; 1186 struct scsipi_channel *chan; 1187 size_t sectorsize; 1188 1189 periph = sd->sc_periph; 1190 chan = periph->periph_channel; 1191 1192 sectorsize = dg->dg_secsize; 1193 1194 xs = &sx; 1195 1196 #ifndef SD_DUMP_NOT_TRUSTED 1197 /* 1198 * Fill out the scsi command 1199 */ 1200 memset(&cmd, 0, sizeof(cmd)); 1201 cmd.opcode = WRITE_10; 1202 _lto4b(blkno, cmd.addr); 1203 _lto2b(nblk, cmd.length); 1204 /* 1205 * Fill out the scsipi_xfer structure 1206 * Note: we cannot sleep as we may be an interrupt 1207 * don't use scsipi_command() as it may want to wait 1208 * for an xs. 1209 */ 1210 memset(xs, 0, sizeof(sx)); 1211 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1212 XS_CTL_DATA_OUT; 1213 xs->xs_status = 0; 1214 xs->xs_periph = periph; 1215 xs->xs_retries = SDRETRIES; 1216 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1217 xs->cmd = (struct scsipi_generic *)&cmd; 1218 xs->cmdlen = sizeof(cmd); 1219 xs->resid = nblk * sectorsize; 1220 xs->error = XS_NOERROR; 1221 xs->bp = 0; 1222 xs->data = va; 1223 xs->datalen = nblk * sectorsize; 1224 callout_init(&xs->xs_callout, 0); 1225 1226 /* 1227 * Pass all this info to the scsi driver. 1228 */ 1229 scsipi_adapter_request(chan, ADAPTER_REQ_RUN_XFER, xs); 1230 if ((xs->xs_status & XS_STS_DONE) == 0 || 1231 xs->error != XS_NOERROR) 1232 return (EIO); 1233 #else /* SD_DUMP_NOT_TRUSTED */ 1234 /* Let's just talk about this first... */ 1235 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1236 delay(500 * 1000); /* half a second */ 1237 #endif /* SD_DUMP_NOT_TRUSTED */ 1238 1239 return (0); 1240 } 1241 1242 static int 1243 sd_mode_sense(struct sd_softc *sd, u_int8_t byte2, void *sense, size_t size, 1244 int page, int flags, int *big) 1245 { 1246 1247 if ((sd->sc_periph->periph_quirks & PQUIRK_ONLYBIG) && 1248 !(sd->sc_periph->periph_quirks & PQUIRK_NOBIGMODESENSE)) { 1249 *big = 1; 1250 return scsipi_mode_sense_big(sd->sc_periph, byte2, page, sense, 1251 size + sizeof(struct scsi_mode_parameter_header_10), 1252 flags, SDRETRIES, 6000); 1253 } else { 1254 *big = 0; 1255 return scsipi_mode_sense(sd->sc_periph, byte2, page, sense, 1256 size + sizeof(struct scsi_mode_parameter_header_6), 1257 flags, SDRETRIES, 6000); 1258 } 1259 } 1260 1261 static int 1262 sd_mode_select(struct sd_softc *sd, u_int8_t byte2, void *sense, size_t size, 1263 int flags, int big) 1264 { 1265 1266 if (big) { 1267 struct scsi_mode_parameter_header_10 *header = sense; 1268 1269 _lto2b(0, header->data_length); 1270 return scsipi_mode_select_big(sd->sc_periph, byte2, sense, 1271 size + sizeof(struct scsi_mode_parameter_header_10), 1272 flags, SDRETRIES, 6000); 1273 } else { 1274 struct scsi_mode_parameter_header_6 *header = sense; 1275 1276 header->data_length = 0; 1277 return scsipi_mode_select(sd->sc_periph, byte2, sense, 1278 size + sizeof(struct scsi_mode_parameter_header_6), 1279 flags, SDRETRIES, 6000); 1280 } 1281 } 1282 1283 /* 1284 * sd_validate_blksize: 1285 * 1286 * Validate the block size. Print error if periph is specified, 1287 */ 1288 static int 1289 sd_validate_blksize(struct scsipi_periph *periph, int len) 1290 { 1291 1292 switch (len) { 1293 case 256: 1294 case 512: 1295 case 1024: 1296 case 2048: 1297 case 4096: 1298 return 1; 1299 } 1300 1301 if (periph) { 1302 scsipi_printaddr(periph); 1303 printf("%s sector size: 0x%x. Defaulting to %d bytes.\n", 1304 (len ^ (1 << (ffs(len) - 1))) ? 1305 "preposterous" : "unsupported", 1306 len, SD_DEFAULT_BLKSIZE); 1307 } 1308 1309 return 0; 1310 } 1311 1312 /* 1313 * sd_read_capacity: 1314 * 1315 * Find out from the device what its capacity is. 1316 */ 1317 static u_int64_t 1318 sd_read_capacity(struct scsipi_periph *periph, int *blksize, int flags) 1319 { 1320 union { 1321 struct scsipi_read_capacity_10 cmd; 1322 struct scsipi_read_capacity_16 cmd16; 1323 } cmd; 1324 union { 1325 struct scsipi_read_capacity_10_data data; 1326 struct scsipi_read_capacity_16_data data16; 1327 } *datap; 1328 uint64_t rv; 1329 1330 memset(&cmd, 0, sizeof(cmd)); 1331 cmd.cmd.opcode = READ_CAPACITY_10; 1332 1333 /* 1334 * Don't allocate data buffer on stack; 1335 * The lower driver layer might use the same stack and 1336 * if it uses region which is in the same cacheline, 1337 * cache flush ops against the data buffer won't work properly. 1338 */ 1339 datap = malloc(sizeof(*datap), M_TEMP, M_WAITOK); 1340 if (datap == NULL) 1341 return 0; 1342 1343 /* 1344 * If the command works, interpret the result as a 4 byte 1345 * number of blocks 1346 */ 1347 rv = 0; 1348 memset(datap, 0, sizeof(datap->data)); 1349 if (scsipi_command(periph, (void *)&cmd.cmd, sizeof(cmd.cmd), 1350 (void *)datap, sizeof(datap->data), SCSIPIRETRIES, 20000, NULL, 1351 flags | XS_CTL_DATA_IN | XS_CTL_SILENT) != 0) 1352 goto out; 1353 1354 if (_4btol(datap->data.addr) != 0xffffffff) { 1355 *blksize = _4btol(datap->data.length); 1356 rv = _4btol(datap->data.addr) + 1; 1357 goto out; 1358 } 1359 1360 /* 1361 * Device is larger than can be reflected by READ CAPACITY (10). 1362 * Try READ CAPACITY (16). 1363 */ 1364 1365 memset(&cmd, 0, sizeof(cmd)); 1366 cmd.cmd16.opcode = READ_CAPACITY_16; 1367 cmd.cmd16.byte2 = SRC16_SERVICE_ACTION; 1368 _lto4b(sizeof(datap->data16), cmd.cmd16.len); 1369 1370 memset(datap, 0, sizeof(datap->data16)); 1371 if (scsipi_command(periph, (void *)&cmd.cmd16, sizeof(cmd.cmd16), 1372 (void *)datap, sizeof(datap->data16), SCSIPIRETRIES, 20000, NULL, 1373 flags | XS_CTL_DATA_IN | XS_CTL_SILENT) != 0) 1374 goto out; 1375 1376 *blksize = _4btol(datap->data16.length); 1377 rv = _8btol(datap->data16.addr) + 1; 1378 1379 out: 1380 free(datap, M_TEMP); 1381 return rv; 1382 } 1383 1384 static int 1385 sd_get_simplifiedparms(struct sd_softc *sd, struct disk_parms *dp, int flags) 1386 { 1387 struct { 1388 struct scsi_mode_parameter_header_6 header; 1389 /* no block descriptor */ 1390 u_int8_t pg_code; /* page code (should be 6) */ 1391 u_int8_t pg_length; /* page length (should be 11) */ 1392 u_int8_t wcd; /* bit0: cache disable */ 1393 u_int8_t lbs[2]; /* logical block size */ 1394 u_int8_t size[5]; /* number of log. blocks */ 1395 u_int8_t pp; /* power/performance */ 1396 u_int8_t flags; 1397 u_int8_t resvd; 1398 } scsipi_sense; 1399 u_int64_t blocks; 1400 int error, blksize; 1401 1402 /* 1403 * sd_read_capacity (ie "read capacity") and mode sense page 6 1404 * give the same information. Do both for now, and check 1405 * for consistency. 1406 * XXX probably differs for removable media 1407 */ 1408 dp->blksize = SD_DEFAULT_BLKSIZE; 1409 if ((blocks = sd_read_capacity(sd->sc_periph, &blksize, flags)) == 0) 1410 return (SDGP_RESULT_OFFLINE); /* XXX? */ 1411 1412 error = scsipi_mode_sense(sd->sc_periph, SMS_DBD, 6, 1413 &scsipi_sense.header, sizeof(scsipi_sense), 1414 flags, SDRETRIES, 6000); 1415 1416 if (error != 0) 1417 return (SDGP_RESULT_OFFLINE); /* XXX? */ 1418 1419 dp->blksize = blksize; 1420 if (!sd_validate_blksize(NULL, dp->blksize)) 1421 dp->blksize = _2btol(scsipi_sense.lbs); 1422 if (!sd_validate_blksize(sd->sc_periph, dp->blksize)) 1423 dp->blksize = SD_DEFAULT_BLKSIZE; 1424 1425 /* 1426 * Create a pseudo-geometry. 1427 */ 1428 dp->heads = 64; 1429 dp->sectors = 32; 1430 dp->cyls = blocks / (dp->heads * dp->sectors); 1431 dp->disksize = _5btol(scsipi_sense.size); 1432 if (dp->disksize <= UINT32_MAX && dp->disksize != blocks) { 1433 printf("RBC size: mode sense=%llu, get cap=%llu\n", 1434 (unsigned long long)dp->disksize, 1435 (unsigned long long)blocks); 1436 dp->disksize = blocks; 1437 } 1438 dp->disksize512 = (dp->disksize * dp->blksize) / DEV_BSIZE; 1439 1440 return (SDGP_RESULT_OK); 1441 } 1442 1443 /* 1444 * Get the scsi driver to send a full inquiry to the * device and use the 1445 * results to fill out the disk parameter structure. 1446 */ 1447 static int 1448 sd_get_capacity(struct sd_softc *sd, struct disk_parms *dp, int flags) 1449 { 1450 u_int64_t blocks; 1451 int error, blksize; 1452 #if 0 1453 int i; 1454 u_int8_t *p; 1455 #endif 1456 1457 dp->disksize = blocks = sd_read_capacity(sd->sc_periph, &blksize, 1458 flags); 1459 if (blocks == 0) { 1460 struct scsipi_read_format_capacities cmd; 1461 struct { 1462 struct scsipi_capacity_list_header header; 1463 struct scsipi_capacity_descriptor desc; 1464 } __packed data; 1465 1466 memset(&cmd, 0, sizeof(cmd)); 1467 memset(&data, 0, sizeof(data)); 1468 cmd.opcode = READ_FORMAT_CAPACITIES; 1469 _lto2b(sizeof(data), cmd.length); 1470 1471 error = scsipi_command(sd->sc_periph, 1472 (void *)&cmd, sizeof(cmd), (void *)&data, sizeof(data), 1473 SDRETRIES, 20000, NULL, 1474 flags | XS_CTL_DATA_IN); 1475 if (error == EFTYPE) { 1476 /* Medium Format Corrupted, handle as not formatted */ 1477 return (SDGP_RESULT_UNFORMATTED); 1478 } 1479 if (error || data.header.length == 0) 1480 return (SDGP_RESULT_OFFLINE); 1481 1482 #if 0 1483 printf("rfc: length=%d\n", data.header.length); 1484 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"); 1485 #endif 1486 switch (data.desc.byte5 & SCSIPI_CAP_DESC_CODE_MASK) { 1487 case SCSIPI_CAP_DESC_CODE_RESERVED: 1488 case SCSIPI_CAP_DESC_CODE_FORMATTED: 1489 break; 1490 1491 case SCSIPI_CAP_DESC_CODE_UNFORMATTED: 1492 return (SDGP_RESULT_UNFORMATTED); 1493 1494 case SCSIPI_CAP_DESC_CODE_NONE: 1495 return (SDGP_RESULT_OFFLINE); 1496 } 1497 1498 dp->disksize = blocks = _4btol(data.desc.nblks); 1499 if (blocks == 0) 1500 return (SDGP_RESULT_OFFLINE); /* XXX? */ 1501 1502 blksize = _3btol(data.desc.blklen); 1503 1504 } else if (!sd_validate_blksize(NULL, blksize)) { 1505 struct sd_mode_sense_data scsipi_sense; 1506 int big, bsize; 1507 struct scsi_general_block_descriptor *bdesc; 1508 1509 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1510 error = sd_mode_sense(sd, 0, &scsipi_sense, 1511 sizeof(scsipi_sense.blk_desc), 0, flags | XS_CTL_SILENT, &big); 1512 if (!error) { 1513 if (big) { 1514 bdesc = (void *)(&scsipi_sense.header.big + 1); 1515 bsize = _2btol(scsipi_sense.header.big.blk_desc_len); 1516 } else { 1517 bdesc = (void *)(&scsipi_sense.header.small + 1); 1518 bsize = scsipi_sense.header.small.blk_desc_len; 1519 } 1520 1521 #if 0 1522 printf("page 0 sense:"); for (i = sizeof(scsipi_sense), p = (void *)&scsipi_sense; i; i--, p++) printf(" %02x", *p); printf("\n"); 1523 printf("page 0 bsize=%d\n", bsize); 1524 printf("page 0 ok\n"); 1525 #endif 1526 1527 if (bsize >= 8) { 1528 blksize = _3btol(bdesc->blklen); 1529 } 1530 } 1531 } 1532 1533 if (!sd_validate_blksize(sd->sc_periph, blksize)) 1534 blksize = SD_DEFAULT_BLKSIZE; 1535 1536 dp->blksize = blksize; 1537 dp->disksize512 = (blocks * dp->blksize) / DEV_BSIZE; 1538 return (0); 1539 } 1540 1541 static int 1542 sd_get_parms_page4(struct sd_softc *sd, struct disk_parms *dp, int flags) 1543 { 1544 struct sd_mode_sense_data scsipi_sense; 1545 int error; 1546 int big, byte2; 1547 size_t poffset; 1548 union scsi_disk_pages *pages; 1549 1550 byte2 = SMS_DBD; 1551 again: 1552 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1553 error = sd_mode_sense(sd, byte2, &scsipi_sense, 1554 (byte2 ? 0 : sizeof(scsipi_sense.blk_desc)) + 1555 sizeof(scsipi_sense.pages.rigid_geometry), 4, 1556 flags | XS_CTL_SILENT, &big); 1557 if (error) { 1558 if (byte2 == SMS_DBD) { 1559 /* No result; try once more with DBD off */ 1560 byte2 = 0; 1561 goto again; 1562 } 1563 return (error); 1564 } 1565 1566 if (big) { 1567 poffset = sizeof scsipi_sense.header.big; 1568 poffset += _2btol(scsipi_sense.header.big.blk_desc_len); 1569 } else { 1570 poffset = sizeof scsipi_sense.header.small; 1571 poffset += scsipi_sense.header.small.blk_desc_len; 1572 } 1573 1574 if (poffset > sizeof(scsipi_sense) - sizeof(pages->rigid_geometry)) 1575 return ERESTART; 1576 1577 pages = (void *)((u_long)&scsipi_sense + poffset); 1578 #if 0 1579 { 1580 size_t i; 1581 u_int8_t *p; 1582 1583 printf("page 4 sense:"); 1584 for (i = sizeof(scsipi_sense), p = (void *)&scsipi_sense; i; 1585 i--, p++) 1586 printf(" %02x", *p); 1587 printf("\n"); 1588 printf("page 4 pg_code=%d sense=%p/%p\n", 1589 pages->rigid_geometry.pg_code, &scsipi_sense, pages); 1590 } 1591 #endif 1592 1593 if ((pages->rigid_geometry.pg_code & PGCODE_MASK) != 4) 1594 return (ERESTART); 1595 1596 SC_DEBUG(sd->sc_periph, SCSIPI_DB3, 1597 ("%d cyls, %d heads, %d precomp, %d red_write, %d land_zone\n", 1598 _3btol(pages->rigid_geometry.ncyl), 1599 pages->rigid_geometry.nheads, 1600 _2btol(pages->rigid_geometry.st_cyl_wp), 1601 _2btol(pages->rigid_geometry.st_cyl_rwc), 1602 _2btol(pages->rigid_geometry.land_zone))); 1603 1604 /* 1605 * KLUDGE!! (for zone recorded disks) 1606 * give a number of sectors so that sec * trks * cyls 1607 * is <= disk_size 1608 * can lead to wasted space! THINK ABOUT THIS ! 1609 */ 1610 dp->heads = pages->rigid_geometry.nheads; 1611 dp->cyls = _3btol(pages->rigid_geometry.ncyl); 1612 if (dp->heads == 0 || dp->cyls == 0) 1613 return (ERESTART); 1614 dp->sectors = dp->disksize / (dp->heads * dp->cyls); /* XXX */ 1615 1616 dp->rot_rate = _2btol(pages->rigid_geometry.rpm); 1617 if (dp->rot_rate == 0) 1618 dp->rot_rate = 3600; 1619 1620 #if 0 1621 printf("page 4 ok\n"); 1622 #endif 1623 return (0); 1624 } 1625 1626 static int 1627 sd_get_parms_page5(struct sd_softc *sd, struct disk_parms *dp, int flags) 1628 { 1629 struct sd_mode_sense_data scsipi_sense; 1630 int error; 1631 int big, byte2; 1632 size_t poffset; 1633 union scsi_disk_pages *pages; 1634 1635 byte2 = SMS_DBD; 1636 again: 1637 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1638 error = sd_mode_sense(sd, 0, &scsipi_sense, 1639 (byte2 ? 0 : sizeof(scsipi_sense.blk_desc)) + 1640 sizeof(scsipi_sense.pages.flex_geometry), 5, 1641 flags | XS_CTL_SILENT, &big); 1642 if (error) { 1643 if (byte2 == SMS_DBD) { 1644 /* No result; try once more with DBD off */ 1645 byte2 = 0; 1646 goto again; 1647 } 1648 return (error); 1649 } 1650 1651 if (big) { 1652 poffset = sizeof scsipi_sense.header.big; 1653 poffset += _2btol(scsipi_sense.header.big.blk_desc_len); 1654 } else { 1655 poffset = sizeof scsipi_sense.header.small; 1656 poffset += scsipi_sense.header.small.blk_desc_len; 1657 } 1658 1659 if (poffset > sizeof(scsipi_sense) - sizeof(pages->flex_geometry)) 1660 return ERESTART; 1661 1662 pages = (void *)((u_long)&scsipi_sense + poffset); 1663 #if 0 1664 { 1665 size_t i; 1666 u_int8_t *p; 1667 1668 printf("page 5 sense:"); 1669 for (i = sizeof(scsipi_sense), p = (void *)&scsipi_sense; i; 1670 i--, p++) 1671 printf(" %02x", *p); 1672 printf("\n"); 1673 printf("page 5 pg_code=%d sense=%p/%p\n", 1674 pages->flex_geometry.pg_code, &scsipi_sense, pages); 1675 } 1676 #endif 1677 1678 if ((pages->flex_geometry.pg_code & PGCODE_MASK) != 5) 1679 return (ERESTART); 1680 1681 SC_DEBUG(sd->sc_periph, SCSIPI_DB3, 1682 ("%d cyls, %d heads, %d sec, %d bytes/sec\n", 1683 _3btol(pages->flex_geometry.ncyl), 1684 pages->flex_geometry.nheads, 1685 pages->flex_geometry.ph_sec_tr, 1686 _2btol(pages->flex_geometry.bytes_s))); 1687 1688 dp->heads = pages->flex_geometry.nheads; 1689 dp->cyls = _2btol(pages->flex_geometry.ncyl); 1690 dp->sectors = pages->flex_geometry.ph_sec_tr; 1691 if (dp->heads == 0 || dp->cyls == 0 || dp->sectors == 0) 1692 return (ERESTART); 1693 1694 dp->rot_rate = _2btol(pages->rigid_geometry.rpm); 1695 if (dp->rot_rate == 0) 1696 dp->rot_rate = 3600; 1697 1698 #if 0 1699 printf("page 5 ok\n"); 1700 #endif 1701 return (0); 1702 } 1703 1704 static int 1705 sd_get_parms(struct sd_softc *sd, struct disk_parms *dp, int flags) 1706 { 1707 struct dk_softc *dksc = &sd->sc_dksc; 1708 int error; 1709 1710 /* 1711 * If offline, the SDEV_MEDIA_LOADED flag will be 1712 * cleared by the caller if necessary. 1713 */ 1714 if (sd->type == T_SIMPLE_DIRECT) { 1715 error = sd_get_simplifiedparms(sd, dp, flags); 1716 if (!error) 1717 goto setprops; 1718 return (error); 1719 } 1720 1721 error = sd_get_capacity(sd, dp, flags); 1722 if (error) 1723 return (error); 1724 1725 if (sd->type == T_OPTICAL) 1726 goto page0; 1727 1728 if (sd->sc_periph->periph_flags & PERIPH_REMOVABLE) { 1729 if (!sd_get_parms_page5(sd, dp, flags) || 1730 !sd_get_parms_page4(sd, dp, flags)) 1731 goto setprops; 1732 } else { 1733 if (!sd_get_parms_page4(sd, dp, flags) || 1734 !sd_get_parms_page5(sd, dp, flags)) 1735 goto setprops; 1736 } 1737 1738 page0: 1739 printf("%s: fabricating a geometry\n", dksc->sc_xname); 1740 /* Try calling driver's method for figuring out geometry. */ 1741 if (!sd->sc_periph->periph_channel->chan_adapter->adapt_getgeom || 1742 !(*sd->sc_periph->periph_channel->chan_adapter->adapt_getgeom) 1743 (sd->sc_periph, dp, dp->disksize)) { 1744 /* 1745 * Use adaptec standard fictitious geometry 1746 * this depends on which controller (e.g. 1542C is 1747 * different. but we have to put SOMETHING here..) 1748 */ 1749 dp->heads = 64; 1750 dp->sectors = 32; 1751 dp->cyls = dp->disksize / (64 * 32); 1752 } 1753 dp->rot_rate = 3600; 1754 1755 setprops: 1756 sd_set_geometry(sd); 1757 1758 return (SDGP_RESULT_OK); 1759 } 1760 1761 static int 1762 sd_flush(struct sd_softc *sd, int flags) 1763 { 1764 struct scsipi_periph *periph = sd->sc_periph; 1765 struct scsi_synchronize_cache_10 cmd; 1766 1767 /* 1768 * If the device is SCSI-2, issue a SYNCHRONIZE CACHE. 1769 * We issue with address 0 length 0, which should be 1770 * interpreted by the device as "all remaining blocks 1771 * starting at address 0". We ignore ILLEGAL REQUEST 1772 * in the event that the command is not supported by 1773 * the device, and poll for completion so that we know 1774 * that the cache has actually been flushed. 1775 * 1776 * Unless, that is, the device can't handle the SYNCHRONIZE CACHE 1777 * command, as indicated by our quirks flags. 1778 * 1779 * XXX What about older devices? 1780 */ 1781 if (periph->periph_version < 2 || 1782 (periph->periph_quirks & PQUIRK_NOSYNCCACHE)) 1783 return (0); 1784 1785 sd->flags |= SDF_FLUSHING; 1786 memset(&cmd, 0, sizeof(cmd)); 1787 cmd.opcode = SCSI_SYNCHRONIZE_CACHE_10; 1788 1789 return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0, 1790 SDRETRIES, 100000, NULL, flags | XS_CTL_IGNORE_ILLEGAL_REQUEST)); 1791 } 1792 1793 static int 1794 sd_getcache(struct sd_softc *sd, int *bitsp) 1795 { 1796 struct scsipi_periph *periph = sd->sc_periph; 1797 struct sd_mode_sense_data scsipi_sense; 1798 int error, bits = 0; 1799 int big; 1800 union scsi_disk_pages *pages; 1801 1802 if (periph->periph_version < 2) 1803 return (EOPNOTSUPP); 1804 1805 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1806 error = sd_mode_sense(sd, SMS_DBD, &scsipi_sense, 1807 sizeof(scsipi_sense.pages.caching_params), 8, 0, &big); 1808 if (error) 1809 return (error); 1810 1811 if (big) 1812 pages = (void *)(&scsipi_sense.header.big + 1); 1813 else 1814 pages = (void *)(&scsipi_sense.header.small + 1); 1815 1816 if ((pages->caching_params.flags & CACHING_RCD) == 0) 1817 bits |= DKCACHE_READ; 1818 if (pages->caching_params.flags & CACHING_WCE) 1819 bits |= DKCACHE_WRITE; 1820 if (pages->caching_params.pg_code & PGCODE_PS) 1821 bits |= DKCACHE_SAVE; 1822 1823 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1824 error = sd_mode_sense(sd, SMS_DBD, &scsipi_sense, 1825 sizeof(scsipi_sense.pages.caching_params), 1826 SMS_PCTRL_CHANGEABLE|8, 0, &big); 1827 if (error == 0) { 1828 if (big) 1829 pages = (void *)(&scsipi_sense.header.big + 1); 1830 else 1831 pages = (void *)(&scsipi_sense.header.small + 1); 1832 1833 if (pages->caching_params.flags & CACHING_RCD) 1834 bits |= DKCACHE_RCHANGE; 1835 if (pages->caching_params.flags & CACHING_WCE) 1836 bits |= DKCACHE_WCHANGE; 1837 } 1838 1839 *bitsp = bits; 1840 1841 return (0); 1842 } 1843 1844 static int 1845 sd_setcache(struct sd_softc *sd, int bits) 1846 { 1847 struct scsipi_periph *periph = sd->sc_periph; 1848 struct sd_mode_sense_data scsipi_sense; 1849 int error; 1850 uint8_t oflags, byte2 = 0; 1851 int big; 1852 union scsi_disk_pages *pages; 1853 1854 if (periph->periph_version < 2) 1855 return (EOPNOTSUPP); 1856 1857 memset(&scsipi_sense, 0, sizeof(scsipi_sense)); 1858 error = sd_mode_sense(sd, SMS_DBD, &scsipi_sense, 1859 sizeof(scsipi_sense.pages.caching_params), 8, 0, &big); 1860 if (error) 1861 return (error); 1862 1863 if (big) 1864 pages = (void *)(&scsipi_sense.header.big + 1); 1865 else 1866 pages = (void *)(&scsipi_sense.header.small + 1); 1867 1868 oflags = pages->caching_params.flags; 1869 1870 if (bits & DKCACHE_READ) 1871 pages->caching_params.flags &= ~CACHING_RCD; 1872 else 1873 pages->caching_params.flags |= CACHING_RCD; 1874 1875 if (bits & DKCACHE_WRITE) 1876 pages->caching_params.flags |= CACHING_WCE; 1877 else 1878 pages->caching_params.flags &= ~CACHING_WCE; 1879 1880 if (oflags == pages->caching_params.flags) 1881 return (0); 1882 1883 pages->caching_params.pg_code &= PGCODE_MASK; 1884 1885 if (bits & DKCACHE_SAVE) 1886 byte2 |= SMS_SP; 1887 1888 return (sd_mode_select(sd, byte2|SMS_PF, &scsipi_sense, 1889 sizeof(struct scsi_mode_page_header) + 1890 pages->caching_params.pg_length, 0, big)); 1891 } 1892 1893 static void 1894 sd_set_geometry(struct sd_softc *sd) 1895 { 1896 struct dk_softc *dksc = &sd->sc_dksc; 1897 struct disk_geom *dg = &dksc->sc_dkdev.dk_geom; 1898 1899 memset(dg, 0, sizeof(*dg)); 1900 1901 dg->dg_secperunit = sd->params.disksize; 1902 dg->dg_secsize = sd->params.blksize; 1903 dg->dg_nsectors = sd->params.sectors; 1904 dg->dg_ntracks = sd->params.heads; 1905 dg->dg_ncylinders = sd->params.cyls; 1906 1907 disk_set_info(dksc->sc_dev, &dksc->sc_dkdev, NULL); 1908 } 1909
Indexes created Mon Sep 29 21:09:56 GMT 2025