1 /* $NetBSD: sd.c,v 1.157 2000/02/07 20:16:57 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian@dialix.oz.au) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992 54 */ 55 56 #include "opt_scsi.h" 57 #include "rnd.h" 58 59 #include <sys/types.h> 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/kernel.h> 63 #include <sys/file.h> 64 #include <sys/stat.h> 65 #include <sys/ioctl.h> 66 #include <sys/scsiio.h> 67 #include <sys/buf.h> 68 #include <sys/uio.h> 69 #include <sys/malloc.h> 70 #include <sys/errno.h> 71 #include <sys/device.h> 72 #include <sys/disklabel.h> 73 #include <sys/disk.h> 74 #include <sys/proc.h> 75 #include <sys/conf.h> 76 #include <sys/vnode.h> 77 #if NRND > 0 78 #include <sys/rnd.h> 79 #endif 80 81 #include <dev/scsipi/scsipi_all.h> 82 #include <dev/scsipi/scsi_all.h> 83 #include <dev/scsipi/scsipi_disk.h> 84 #include <dev/scsipi/scsi_disk.h> 85 #include <dev/scsipi/scsiconf.h> 86 #include <dev/scsipi/sdvar.h> 87 88 #include "sd.h" /* NSD_SCSIBUS and NSD_ATAPIBUS come from here */ 89 90 #ifndef SDOUTSTANDING 91 #define SDOUTSTANDING 4 92 #endif 93 94 #define SDUNIT(dev) DISKUNIT(dev) 95 #define SDPART(dev) DISKPART(dev) 96 #define SDMINOR(unit, part) DISKMINOR(unit, part) 97 #define MAKESDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part) 98 99 #define SDLABELDEV(dev) (MAKESDDEV(major(dev), SDUNIT(dev), RAW_PART)) 100 101 int sdlock __P((struct sd_softc *)); 102 void sdunlock __P((struct sd_softc *)); 103 void sdminphys __P((struct buf *)); 104 void sdgetdefaultlabel __P((struct sd_softc *, struct disklabel *)); 105 void sdgetdisklabel __P((struct sd_softc *)); 106 void sdstart __P((void *)); 107 void sddone __P((struct scsipi_xfer *)); 108 void sd_shutdown __P((void *)); 109 int sd_reassign_blocks __P((struct sd_softc *, u_long)); 110 int sd_interpret_sense __P((struct scsipi_xfer *)); 111 112 extern struct cfdriver sd_cd; 113 114 struct dkdriver sddkdriver = { sdstrategy }; 115 116 struct scsipi_device sd_switch = { 117 sd_interpret_sense, /* check our error handler first */ 118 sdstart, /* have a queue, served by this */ 119 NULL, /* have no async handler */ 120 sddone, /* deal with stats at interrupt time */ 121 }; 122 123 /* 124 * The routine called by the low level scsi routine when it discovers 125 * a device suitable for this driver. 126 */ 127 void 128 sdattach(parent, sd, sc_link, ops) 129 struct device *parent; 130 struct sd_softc *sd; 131 struct scsipi_link *sc_link; 132 const struct sd_ops *ops; 133 { 134 int error, result; 135 struct disk_parms *dp = &sd->params; 136 char pbuf[9]; 137 138 SC_DEBUG(sc_link, SDEV_DB2, ("sdattach: ")); 139 140 BUFQ_INIT(&sd->buf_queue); 141 142 /* 143 * Store information needed to contact our base driver 144 */ 145 sd->sc_link = sc_link; 146 sd->sc_ops = ops; 147 sc_link->device = &sd_switch; 148 sc_link->device_softc = sd; 149 if (sc_link->openings > SDOUTSTANDING) 150 sc_link->openings = SDOUTSTANDING; 151 152 /* 153 * Initialize and attach the disk structure. 154 */ 155 sd->sc_dk.dk_driver = &sddkdriver; 156 sd->sc_dk.dk_name = sd->sc_dev.dv_xname; 157 disk_attach(&sd->sc_dk); 158 159 #if !defined(__i386__) && !defined(__vax__) 160 dk_establish(&sd->sc_dk, &sd->sc_dev); /* XXX */ 161 #endif 162 163 /* 164 * Use the subdriver to request information regarding 165 * the drive. We cannot use interrupts yet, so the 166 * request must specify this. 167 */ 168 printf("\n"); 169 170 error = scsipi_start(sd->sc_link, SSS_START, 171 XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST | 172 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 173 174 if (error) 175 result = SDGP_RESULT_OFFLINE; 176 else 177 result = (*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 178 XS_CTL_DISCOVERY); 179 printf("%s: ", sd->sc_dev.dv_xname); 180 switch (result) { 181 case SDGP_RESULT_OK: 182 format_bytes(pbuf, sizeof(pbuf), 183 (u_int64_t)dp->disksize * dp->blksize); 184 printf( 185 "%s, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %ld sectors", 186 pbuf, dp->cyls, dp->heads, dp->sectors, dp->blksize, 187 dp->disksize); 188 break; 189 190 case SDGP_RESULT_OFFLINE: 191 printf("drive offline"); 192 break; 193 194 case SDGP_RESULT_UNFORMATTED: 195 printf("unformatted media"); 196 break; 197 198 #ifdef DIAGNOSTIC 199 default: 200 panic("sdattach: unknown result from get_parms"); 201 break; 202 #endif 203 } 204 printf("\n"); 205 206 /* 207 * Establish a shutdown hook so that we can ensure that 208 * our data has actually made it onto the platter at 209 * shutdown time. Note that this relies on the fact 210 * that the shutdown hook code puts us at the head of 211 * the list (thus guaranteeing that our hook runs before 212 * our ancestors'). 213 */ 214 if ((sd->sc_sdhook = 215 shutdownhook_establish(sd_shutdown, sd)) == NULL) 216 printf("%s: WARNING: unable to establish shutdown hook\n", 217 sd->sc_dev.dv_xname); 218 219 #if NRND > 0 220 /* 221 * attach the device into the random source list 222 */ 223 rnd_attach_source(&sd->rnd_source, sd->sc_dev.dv_xname, 224 RND_TYPE_DISK, 0); 225 #endif 226 } 227 228 int 229 sdactivate(self, act) 230 struct device *self; 231 enum devact act; 232 { 233 int rv = 0; 234 235 switch (act) { 236 case DVACT_ACTIVATE: 237 rv = EOPNOTSUPP; 238 break; 239 240 case DVACT_DEACTIVATE: 241 /* 242 * Nothing to do; we key off the device's DVF_ACTIVE. 243 */ 244 break; 245 } 246 return (rv); 247 } 248 249 int 250 sddetach(self, flags) 251 struct device *self; 252 int flags; 253 { 254 struct sd_softc *sd = (struct sd_softc *) self; 255 struct buf *bp; 256 int s, bmaj, cmaj, mn; 257 258 /* locate the major number */ 259 for (bmaj = 0; bmaj <= nblkdev; bmaj++) 260 if (bdevsw[bmaj].d_open == sdopen) 261 break; 262 for (cmaj = 0; cmaj <= nchrdev; cmaj++) 263 if (cdevsw[cmaj].d_open == sdopen) 264 break; 265 266 s = splbio(); 267 268 /* Kill off any queued buffers. */ 269 while ((bp = BUFQ_FIRST(&sd->buf_queue)) != NULL) { 270 BUFQ_REMOVE(&sd->buf_queue, bp); 271 bp->b_error = EIO; 272 bp->b_flags |= B_ERROR; 273 bp->b_resid = bp->b_bcount; 274 biodone(bp); 275 } 276 277 /* Kill off any pending commands. */ 278 scsipi_kill_pending(sd->sc_link); 279 280 splx(s); 281 282 /* Nuke the the vnodes for any open instances */ 283 mn = SDMINOR(self->dv_unit, 0); 284 vdevgone(bmaj, mn, mn + (MAXPARTITIONS - 1), VBLK); 285 vdevgone(cmaj, mn, mn + (MAXPARTITIONS - 1), VCHR); 286 287 /* Detach from the disk list. */ 288 disk_detach(&sd->sc_dk); 289 290 /* Get rid of the shutdown hook. */ 291 shutdownhook_disestablish(sd->sc_sdhook); 292 293 #if NRND > 0 294 /* Unhook the entropy source. */ 295 rnd_detach_source(&sd->rnd_source); 296 #endif 297 298 return (0); 299 } 300 301 /* 302 * Wait interruptibly for an exclusive lock. 303 * 304 * XXX 305 * Several drivers do this; it should be abstracted and made MP-safe. 306 */ 307 int 308 sdlock(sd) 309 struct sd_softc *sd; 310 { 311 int error; 312 313 while ((sd->flags & SDF_LOCKED) != 0) { 314 sd->flags |= SDF_WANTED; 315 if ((error = tsleep(sd, PRIBIO | PCATCH, "sdlck", 0)) != 0) 316 return (error); 317 } 318 sd->flags |= SDF_LOCKED; 319 return (0); 320 } 321 322 /* 323 * Unlock and wake up any waiters. 324 */ 325 void 326 sdunlock(sd) 327 struct sd_softc *sd; 328 { 329 330 sd->flags &= ~SDF_LOCKED; 331 if ((sd->flags & SDF_WANTED) != 0) { 332 sd->flags &= ~SDF_WANTED; 333 wakeup(sd); 334 } 335 } 336 337 /* 338 * open the device. Make sure the partition info is a up-to-date as can be. 339 */ 340 int 341 sdopen(dev, flag, fmt, p) 342 dev_t dev; 343 int flag, fmt; 344 struct proc *p; 345 { 346 struct sd_softc *sd; 347 struct scsipi_link *sc_link; 348 int unit, part; 349 int error; 350 351 unit = SDUNIT(dev); 352 if (unit >= sd_cd.cd_ndevs) 353 return (ENXIO); 354 sd = sd_cd.cd_devs[unit]; 355 if (sd == NULL) 356 return (ENXIO); 357 358 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 359 return (ENODEV); 360 361 sc_link = sd->sc_link; 362 part = SDPART(dev); 363 364 SC_DEBUG(sc_link, SDEV_DB1, 365 ("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit, 366 sd_cd.cd_ndevs, part)); 367 368 /* 369 * If this is the first open of this device, add a reference 370 * to the adapter. 371 */ 372 if (sd->sc_dk.dk_openmask == 0 && 373 (error = scsipi_adapter_addref(sc_link)) != 0) 374 return (error); 375 376 if ((error = sdlock(sd)) != 0) 377 goto bad4; 378 379 if ((sc_link->flags & SDEV_OPEN) != 0) { 380 /* 381 * If any partition is open, but the disk has been invalidated, 382 * disallow further opens of non-raw partition 383 */ 384 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0 && 385 (part != RAW_PART || fmt != S_IFCHR)) { 386 error = EIO; 387 goto bad3; 388 } 389 } else { 390 /* Check that it is still responding and ok. */ 391 error = scsipi_test_unit_ready(sc_link, 392 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE | 393 XS_CTL_IGNORE_NOT_READY); 394 if (error) 395 goto bad3; 396 397 /* 398 * Start the pack spinning if necessary. Always allow the 399 * raw parition to be opened, for raw IOCTLs. Data transfers 400 * will check for SDEV_MEDIA_LOADED. 401 */ 402 error = scsipi_start(sc_link, SSS_START, 403 XS_CTL_IGNORE_ILLEGAL_REQUEST | 404 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 405 if (error) { 406 if (part != RAW_PART || fmt != S_IFCHR) 407 goto bad3; 408 else 409 goto out; 410 } 411 412 sc_link->flags |= SDEV_OPEN; 413 414 /* Lock the pack in. */ 415 error = scsipi_prevent(sc_link, PR_PREVENT, 416 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE); 417 if (error) 418 goto bad; 419 420 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 421 sc_link->flags |= SDEV_MEDIA_LOADED; 422 423 /* 424 * Load the physical device parameters. 425 * 426 * Note that if media is present but unformatted, 427 * we allow the open (so that it can be formatted!). 428 * The drive should refuse real I/O, if the media is 429 * unformatted. 430 */ 431 if ((*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 432 0) == SDGP_RESULT_OFFLINE) { 433 error = ENXIO; 434 goto bad2; 435 } 436 SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded ")); 437 438 /* Load the partition info if not already loaded. */ 439 sdgetdisklabel(sd); 440 SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded ")); 441 } 442 } 443 444 /* Check that the partition exists. */ 445 if (part != RAW_PART && 446 (part >= sd->sc_dk.dk_label->d_npartitions || 447 sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 448 error = ENXIO; 449 goto bad; 450 } 451 452 out: /* Insure only one open at a time. */ 453 switch (fmt) { 454 case S_IFCHR: 455 sd->sc_dk.dk_copenmask |= (1 << part); 456 break; 457 case S_IFBLK: 458 sd->sc_dk.dk_bopenmask |= (1 << part); 459 break; 460 } 461 sd->sc_dk.dk_openmask = 462 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 463 464 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 465 sdunlock(sd); 466 return (0); 467 468 bad2: 469 sc_link->flags &= ~SDEV_MEDIA_LOADED; 470 471 bad: 472 if (sd->sc_dk.dk_openmask == 0) { 473 scsipi_prevent(sc_link, PR_ALLOW, 474 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE); 475 sc_link->flags &= ~SDEV_OPEN; 476 } 477 478 bad3: 479 sdunlock(sd); 480 bad4: 481 if (sd->sc_dk.dk_openmask == 0) 482 scsipi_adapter_delref(sc_link); 483 return (error); 484 } 485 486 /* 487 * close the device.. only called if we are the LAST occurence of an open 488 * device. Convenient now but usually a pain. 489 */ 490 int 491 sdclose(dev, flag, fmt, p) 492 dev_t dev; 493 int flag, fmt; 494 struct proc *p; 495 { 496 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 497 int part = SDPART(dev); 498 int error; 499 500 if ((error = sdlock(sd)) != 0) 501 return (error); 502 503 switch (fmt) { 504 case S_IFCHR: 505 sd->sc_dk.dk_copenmask &= ~(1 << part); 506 break; 507 case S_IFBLK: 508 sd->sc_dk.dk_bopenmask &= ~(1 << part); 509 break; 510 } 511 sd->sc_dk.dk_openmask = 512 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 513 514 if (sd->sc_dk.dk_openmask == 0) { 515 /* 516 * If the disk cache needs flushing, and the disk supports 517 * it, do it now. 518 */ 519 if ((sd->flags & SDF_DIRTY) != 0 && 520 sd->sc_ops->sdo_flush != NULL) { 521 if ((*sd->sc_ops->sdo_flush)(sd, 0)) { 522 printf("%s: cache synchronization failed\n", 523 sd->sc_dev.dv_xname); 524 sd->flags &= ~SDF_FLUSHING; 525 } else 526 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 527 } 528 529 scsipi_wait_drain(sd->sc_link); 530 531 scsipi_prevent(sd->sc_link, PR_ALLOW, 532 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 533 sd->sc_link->flags &= ~SDEV_OPEN; 534 535 if (! (sd->sc_link->flags & SDEV_KEEP_LABEL)) 536 sd->sc_link->flags &= ~SDEV_MEDIA_LOADED; 537 538 scsipi_wait_drain(sd->sc_link); 539 540 scsipi_adapter_delref(sd->sc_link); 541 } 542 543 sdunlock(sd); 544 return (0); 545 } 546 547 /* 548 * Actually translate the requested transfer into one the physical driver 549 * can understand. The transfer is described by a buf and will include 550 * only one physical transfer. 551 */ 552 void 553 sdstrategy(bp) 554 struct buf *bp; 555 { 556 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 557 struct disklabel *lp; 558 daddr_t blkno; 559 int s; 560 561 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy ")); 562 SC_DEBUG(sd->sc_link, SDEV_DB1, 563 ("%ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 564 /* 565 * If the device has been made invalid, error out 566 */ 567 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0 || 568 (sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) { 569 if (sd->sc_link->flags & SDEV_OPEN) 570 bp->b_error = EIO; 571 else 572 bp->b_error = ENODEV; 573 goto bad; 574 } 575 576 lp = sd->sc_dk.dk_label; 577 578 /* 579 * The transfer must be a whole number of blocks, offset must not be 580 * negative. 581 */ 582 if ((bp->b_bcount % lp->d_secsize) != 0 || 583 bp->b_blkno < 0) { 584 bp->b_error = EINVAL; 585 goto bad; 586 } 587 /* 588 * If it's a null transfer, return immediatly 589 */ 590 if (bp->b_bcount == 0) 591 goto done; 592 593 /* 594 * Do bounds checking, adjust transfer. if error, process. 595 * If end of partition, just return. 596 */ 597 if (SDPART(bp->b_dev) != RAW_PART && 598 bounds_check_with_label(bp, lp, 599 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 600 goto done; 601 602 /* 603 * Now convert the block number to absolute and put it in 604 * terms of the device's logical block size. 605 */ 606 if (lp->d_secsize >= DEV_BSIZE) 607 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 608 else 609 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 610 611 if (SDPART(bp->b_dev) != RAW_PART) 612 blkno += lp->d_partitions[SDPART(bp->b_dev)].p_offset; 613 614 bp->b_rawblkno = blkno; 615 616 s = splbio(); 617 618 /* 619 * Place it in the queue of disk activities for this disk 620 */ 621 disksort_blkno(&sd->buf_queue, bp); 622 623 /* 624 * Tell the device to get going on the transfer if it's 625 * not doing anything, otherwise just wait for completion 626 */ 627 sdstart(sd); 628 629 splx(s); 630 return; 631 632 bad: 633 bp->b_flags |= B_ERROR; 634 done: 635 /* 636 * Correctly set the buf to indicate a completed xfer 637 */ 638 bp->b_resid = bp->b_bcount; 639 biodone(bp); 640 } 641 642 /* 643 * sdstart looks to see if there is a buf waiting for the device 644 * and that the device is not already busy. If both are true, 645 * It dequeues the buf and creates a scsi command to perform the 646 * transfer in the buf. The transfer request will call scsipi_done 647 * on completion, which will in turn call this routine again 648 * so that the next queued transfer is performed. 649 * The bufs are queued by the strategy routine (sdstrategy) 650 * 651 * This routine is also called after other non-queued requests 652 * have been made of the scsi driver, to ensure that the queue 653 * continues to be drained. 654 * 655 * must be called at the correct (highish) spl level 656 * sdstart() is called at splbio from sdstrategy and scsipi_done 657 */ 658 void 659 sdstart(v) 660 register void *v; 661 { 662 register struct sd_softc *sd = v; 663 register struct scsipi_link *sc_link = sd->sc_link; 664 struct disklabel *lp = sd->sc_dk.dk_label; 665 struct buf *bp = 0; 666 struct scsipi_rw_big cmd_big; 667 #if NSD_SCSIBUS > 0 668 struct scsi_rw cmd_small; 669 #endif 670 struct scsipi_generic *cmdp; 671 int nblks, cmdlen, error; 672 673 SC_DEBUG(sc_link, SDEV_DB2, ("sdstart ")); 674 /* 675 * Check if the device has room for another command 676 */ 677 while (sc_link->active < sc_link->openings) { 678 /* 679 * there is excess capacity, but a special waits 680 * It'll need the adapter as soon as we clear out of the 681 * way and let it run (user level wait). 682 */ 683 if (sc_link->flags & SDEV_WAITING) { 684 sc_link->flags &= ~SDEV_WAITING; 685 wakeup((caddr_t)sc_link); 686 return; 687 } 688 689 /* 690 * See if there is a buf with work for us to do.. 691 */ 692 if ((bp = BUFQ_FIRST(&sd->buf_queue)) == NULL) 693 return; 694 BUFQ_REMOVE(&sd->buf_queue, bp); 695 696 /* 697 * If the device has become invalid, abort all the 698 * reads and writes until all files have been closed and 699 * re-opened 700 */ 701 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 702 bp->b_error = EIO; 703 bp->b_flags |= B_ERROR; 704 bp->b_resid = bp->b_bcount; 705 biodone(bp); 706 continue; 707 } 708 709 /* 710 * We have a buf, now we should make a command. 711 */ 712 713 nblks = howmany(bp->b_bcount, lp->d_secsize); 714 715 #if NSD_SCSIBUS > 0 716 /* 717 * Fill out the scsi command. If the transfer will 718 * fit in a "small" cdb, use it. 719 */ 720 if (((bp->b_rawblkno & 0x1fffff) == bp->b_rawblkno) && 721 ((nblks & 0xff) == nblks) && sc_link->type == BUS_SCSI) { 722 /* 723 * We can fit in a small cdb. 724 */ 725 bzero(&cmd_small, sizeof(cmd_small)); 726 cmd_small.opcode = (bp->b_flags & B_READ) ? 727 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 728 _lto3b(bp->b_rawblkno, cmd_small.addr); 729 cmd_small.length = nblks & 0xff; 730 cmdlen = sizeof(cmd_small); 731 cmdp = (struct scsipi_generic *)&cmd_small; 732 } else 733 #endif 734 { 735 /* 736 * Need a large cdb. 737 */ 738 bzero(&cmd_big, sizeof(cmd_big)); 739 cmd_big.opcode = (bp->b_flags & B_READ) ? 740 READ_BIG : WRITE_BIG; 741 _lto4b(bp->b_rawblkno, cmd_big.addr); 742 _lto2b(nblks, cmd_big.length); 743 cmdlen = sizeof(cmd_big); 744 cmdp = (struct scsipi_generic *)&cmd_big; 745 } 746 747 /* Instrumentation. */ 748 disk_busy(&sd->sc_dk); 749 750 /* 751 * Mark the disk dirty so that the cache will be 752 * flushed on close. 753 */ 754 if ((bp->b_flags & B_READ) == 0) 755 sd->flags |= SDF_DIRTY; 756 757 /* 758 * Call the routine that chats with the adapter. 759 * Note: we cannot sleep as we may be an interrupt 760 * XXX Really need NOSLEEP? 761 */ 762 error = scsipi_command(sc_link, cmdp, cmdlen, 763 (u_char *)bp->b_data, bp->b_bcount, 764 SDRETRIES, 60000, bp, XS_CTL_NOSLEEP | XS_CTL_ASYNC | 765 ((bp->b_flags & B_READ) ? 766 XS_CTL_DATA_IN : XS_CTL_DATA_OUT)); 767 if (error) { 768 disk_unbusy(&sd->sc_dk, 0); 769 printf("%s: not queued, error %d\n", 770 sd->sc_dev.dv_xname, error); 771 } 772 } 773 } 774 775 void 776 sddone(xs) 777 struct scsipi_xfer *xs; 778 { 779 struct sd_softc *sd = xs->sc_link->device_softc; 780 781 if (sd->flags & SDF_FLUSHING) { 782 /* Flush completed, no longer dirty. */ 783 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 784 } 785 786 if (xs->bp != NULL) { 787 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid); 788 #if NRND > 0 789 rnd_add_uint32(&sd->rnd_source, xs->bp->b_rawblkno); 790 #endif 791 } 792 } 793 794 void 795 sdminphys(bp) 796 struct buf *bp; 797 { 798 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 799 long max; 800 801 /* 802 * If the device is ancient, we want to make sure that 803 * the transfer fits into a 6-byte cdb. 804 * 805 * XXX Note that the SCSI-I spec says that 256-block transfers 806 * are allowed in a 6-byte read/write, and are specified 807 * by settng the "length" to 0. However, we're conservative 808 * here, allowing only 255-block transfers in case an 809 * ancient device gets confused by length == 0. A length of 0 810 * in a 10-byte read/write actually means 0 blocks. 811 */ 812 if (sd->flags & SDF_ANCIENT) { 813 max = sd->sc_dk.dk_label->d_secsize * 0xff; 814 815 if (bp->b_bcount > max) 816 bp->b_bcount = max; 817 } 818 819 (*sd->sc_link->adapter->scsipi_minphys)(bp); 820 } 821 822 int 823 sdread(dev, uio, ioflag) 824 dev_t dev; 825 struct uio *uio; 826 int ioflag; 827 { 828 829 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 830 } 831 832 int 833 sdwrite(dev, uio, ioflag) 834 dev_t dev; 835 struct uio *uio; 836 int ioflag; 837 { 838 839 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 840 } 841 842 /* 843 * Perform special action on behalf of the user 844 * Knows about the internals of this device 845 */ 846 int 847 sdioctl(dev, cmd, addr, flag, p) 848 dev_t dev; 849 u_long cmd; 850 caddr_t addr; 851 int flag; 852 struct proc *p; 853 { 854 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 855 int part = SDPART(dev); 856 int error; 857 858 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd)); 859 860 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 861 return (ENODEV); 862 863 /* 864 * If the device is not valid, some IOCTLs can still be 865 * handled on the raw partition. Check this here. 866 */ 867 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 868 switch (cmd) { 869 case DIOCKLABEL: 870 case DIOCWLABEL: 871 case DIOCLOCK: 872 case DIOCEJECT: 873 case ODIOCEJECT: 874 case SCIOCIDENTIFY: 875 case OSCIOCIDENTIFY: 876 case SCIOCCOMMAND: 877 case SCIOCDEBUG: 878 if (part == RAW_PART) 879 break; 880 /* FALLTHROUGH */ 881 default: 882 if ((sd->sc_link->flags & SDEV_OPEN) == 0) 883 return (ENODEV); 884 else 885 return (EIO); 886 } 887 } 888 889 switch (cmd) { 890 case DIOCGDINFO: 891 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 892 return (0); 893 894 case DIOCGPART: 895 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 896 ((struct partinfo *)addr)->part = 897 &sd->sc_dk.dk_label->d_partitions[part]; 898 return (0); 899 900 case DIOCWDINFO: 901 case DIOCSDINFO: 902 if ((flag & FWRITE) == 0) 903 return (EBADF); 904 905 if ((error = sdlock(sd)) != 0) 906 return (error); 907 sd->flags |= SDF_LABELLING; 908 909 error = setdisklabel(sd->sc_dk.dk_label, 910 (struct disklabel *)addr, /*sd->sc_dk.dk_openmask : */0, 911 sd->sc_dk.dk_cpulabel); 912 if (error == 0) { 913 if (cmd == DIOCWDINFO) 914 error = writedisklabel(SDLABELDEV(dev), 915 sdstrategy, sd->sc_dk.dk_label, 916 sd->sc_dk.dk_cpulabel); 917 } 918 919 sd->flags &= ~SDF_LABELLING; 920 sdunlock(sd); 921 return (error); 922 923 case DIOCKLABEL: 924 if (*(int *)addr) 925 sd->sc_link->flags |= SDEV_KEEP_LABEL; 926 else 927 sd->sc_link->flags &= ~SDEV_KEEP_LABEL; 928 return (0); 929 930 case DIOCWLABEL: 931 if ((flag & FWRITE) == 0) 932 return (EBADF); 933 if (*(int *)addr) 934 sd->flags |= SDF_WLABEL; 935 else 936 sd->flags &= ~SDF_WLABEL; 937 return (0); 938 939 case DIOCLOCK: 940 return (scsipi_prevent(sd->sc_link, 941 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 942 943 case DIOCEJECT: 944 if ((sd->sc_link->flags & SDEV_REMOVABLE) == 0) 945 return (ENOTTY); 946 if (*(int *)addr == 0) { 947 /* 948 * Don't force eject: check that we are the only 949 * partition open. If so, unlock it. 950 */ 951 if ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 952 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 953 sd->sc_dk.dk_openmask) { 954 error = scsipi_prevent(sd->sc_link, PR_ALLOW, 955 XS_CTL_IGNORE_NOT_READY); 956 if (error) 957 return (error); 958 } else { 959 return (EBUSY); 960 } 961 } 962 /* FALLTHROUGH */ 963 case ODIOCEJECT: 964 return ((sd->sc_link->flags & SDEV_REMOVABLE) == 0 ? ENOTTY : 965 scsipi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0)); 966 967 case DIOCGDEFLABEL: 968 sdgetdefaultlabel(sd, (struct disklabel *)addr); 969 return (0); 970 971 default: 972 if (part != RAW_PART) 973 return (ENOTTY); 974 return (scsipi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p)); 975 } 976 977 #ifdef DIAGNOSTIC 978 panic("sdioctl: impossible"); 979 #endif 980 } 981 982 void 983 sdgetdefaultlabel(sd, lp) 984 struct sd_softc *sd; 985 struct disklabel *lp; 986 { 987 988 bzero(lp, sizeof(struct disklabel)); 989 990 lp->d_secsize = sd->params.blksize; 991 lp->d_ntracks = sd->params.heads; 992 lp->d_nsectors = sd->params.sectors; 993 lp->d_ncylinders = sd->params.cyls; 994 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 995 996 switch (sd->sc_link->type) { 997 #if NSD_SCSIBUS > 0 998 case BUS_SCSI: 999 lp->d_type = DTYPE_SCSI; 1000 break; 1001 #endif 1002 #if NSD_ATAPIBUS > 0 1003 case BUS_ATAPI: 1004 lp->d_type = DTYPE_ATAPI; 1005 break; 1006 #endif 1007 } 1008 strncpy(lp->d_typename, sd->name, 16); 1009 strncpy(lp->d_packname, "fictitious", 16); 1010 lp->d_secperunit = sd->params.disksize; 1011 lp->d_rpm = sd->params.rot_rate; 1012 lp->d_interleave = 1; 1013 lp->d_flags = 0; 1014 1015 lp->d_partitions[RAW_PART].p_offset = 0; 1016 lp->d_partitions[RAW_PART].p_size = 1017 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1018 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1019 lp->d_npartitions = RAW_PART + 1; 1020 1021 lp->d_magic = DISKMAGIC; 1022 lp->d_magic2 = DISKMAGIC; 1023 lp->d_checksum = dkcksum(lp); 1024 } 1025 1026 1027 /* 1028 * Load the label information on the named device 1029 */ 1030 void 1031 sdgetdisklabel(sd) 1032 struct sd_softc *sd; 1033 { 1034 struct disklabel *lp = sd->sc_dk.dk_label; 1035 char *errstring; 1036 1037 bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel)); 1038 1039 sdgetdefaultlabel(sd, lp); 1040 1041 if (lp->d_secpercyl == 0) { 1042 lp->d_secpercyl = 100; 1043 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1044 } 1045 1046 /* 1047 * Call the generic disklabel extraction routine 1048 */ 1049 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1050 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1051 if (errstring) { 1052 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1053 return; 1054 } 1055 } 1056 1057 void 1058 sd_shutdown(arg) 1059 void *arg; 1060 { 1061 struct sd_softc *sd = arg; 1062 1063 /* 1064 * If the disk cache needs to be flushed, and the disk supports 1065 * it, flush it. We're cold at this point, so we poll for 1066 * completion. 1067 */ 1068 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1069 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1070 printf("%s: cache synchronization failed\n", 1071 sd->sc_dev.dv_xname); 1072 sd->flags &= ~SDF_FLUSHING; 1073 } else 1074 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1075 } 1076 } 1077 1078 /* 1079 * Tell the device to map out a defective block 1080 */ 1081 int 1082 sd_reassign_blocks(sd, blkno) 1083 struct sd_softc *sd; 1084 u_long blkno; 1085 { 1086 struct scsi_reassign_blocks scsipi_cmd; 1087 struct scsi_reassign_blocks_data rbdata; 1088 1089 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 1090 bzero(&rbdata, sizeof(rbdata)); 1091 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1092 1093 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1094 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1095 1096 return (scsipi_command(sd->sc_link, 1097 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1098 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1099 XS_CTL_DATA_OUT)); 1100 } 1101 1102 /* 1103 * Check Errors 1104 */ 1105 int 1106 sd_interpret_sense(xs) 1107 struct scsipi_xfer *xs; 1108 { 1109 struct scsipi_link *sc_link = xs->sc_link; 1110 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1111 struct sd_softc *sd = sc_link->device_softc; 1112 int retval = SCSIRET_CONTINUE; 1113 1114 /* 1115 * If the device is not open yet, let the generic code handle it. 1116 */ 1117 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 1118 return (retval); 1119 } 1120 1121 /* 1122 * If it isn't a extended or extended/deferred error, let 1123 * the generic code handle it. 1124 */ 1125 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1126 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1127 return (retval); 1128 } 1129 1130 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1131 sense->add_sense_code == 0x4) { 1132 if (sense->add_sense_code_qual == 0x01) { 1133 printf("%s: ..is spinning up...waiting\n", 1134 sd->sc_dev.dv_xname); 1135 /* 1136 * I really need a sdrestart function I can call here. 1137 */ 1138 delay(1000000 * 5); /* 5 seconds */ 1139 retval = SCSIRET_RETRY; 1140 } else if ((sense->add_sense_code_qual == 0x2) && 1141 (sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 1142 if (sd->sc_link->flags & SDEV_REMOVABLE) { 1143 printf( 1144 "%s: removable disk stopped - not restarting\n", 1145 sd->sc_dev.dv_xname); 1146 retval = EIO; 1147 } else { 1148 printf("%s: respinning up disk\n", 1149 sd->sc_dev.dv_xname); 1150 retval = scsipi_start(sd->sc_link, SSS_START, 1151 XS_CTL_URGENT | XS_CTL_NOSLEEP); 1152 if (retval != 0) { 1153 printf( 1154 "%s: respin of disk failed - %d\n", 1155 sd->sc_dev.dv_xname, retval); 1156 retval = EIO; 1157 } else { 1158 retval = SCSIRET_RETRY; 1159 } 1160 } 1161 } 1162 } 1163 return (retval); 1164 } 1165 1166 1167 int 1168 sdsize(dev) 1169 dev_t dev; 1170 { 1171 struct sd_softc *sd; 1172 int part, unit, omask; 1173 int size; 1174 1175 unit = SDUNIT(dev); 1176 if (unit >= sd_cd.cd_ndevs) 1177 return (-1); 1178 sd = sd_cd.cd_devs[unit]; 1179 if (sd == NULL) 1180 return (-1); 1181 1182 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1183 return (-1); 1184 1185 part = SDPART(dev); 1186 omask = sd->sc_dk.dk_openmask & (1 << part); 1187 1188 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1189 return (-1); 1190 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) 1191 size = -1; 1192 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1193 size = -1; 1194 else 1195 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1196 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1197 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1198 return (-1); 1199 return (size); 1200 } 1201 1202 #ifndef __BDEVSW_DUMP_OLD_TYPE 1203 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1204 static struct scsipi_xfer sx; 1205 static int sddoingadump; 1206 1207 /* 1208 * dump all of physical memory into the partition specified, starting 1209 * at offset 'dumplo' into the partition. 1210 */ 1211 int 1212 sddump(dev, blkno, va, size) 1213 dev_t dev; 1214 daddr_t blkno; 1215 caddr_t va; 1216 size_t size; 1217 { 1218 struct sd_softc *sd; /* disk unit to do the I/O */ 1219 struct disklabel *lp; /* disk's disklabel */ 1220 int unit, part; 1221 int sectorsize; /* size of a disk sector */ 1222 int nsects; /* number of sectors in partition */ 1223 int sectoff; /* sector offset of partition */ 1224 int totwrt; /* total number of sectors left to write */ 1225 int nwrt; /* current number of sectors to write */ 1226 struct scsipi_rw_big cmd; /* write command */ 1227 struct scsipi_xfer *xs; /* ... convenience */ 1228 int retval; 1229 1230 /* Check if recursive dump; if so, punt. */ 1231 if (sddoingadump) 1232 return (EFAULT); 1233 1234 /* Mark as active early. */ 1235 sddoingadump = 1; 1236 1237 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1238 part = SDPART(dev); 1239 1240 /* Check for acceptable drive number. */ 1241 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1242 return (ENXIO); 1243 1244 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1245 return (ENODEV); 1246 1247 /* Make sure it was initialized. */ 1248 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED) 1249 return (ENXIO); 1250 1251 /* Convert to disk sectors. Request must be a multiple of size. */ 1252 lp = sd->sc_dk.dk_label; 1253 sectorsize = lp->d_secsize; 1254 if ((size % sectorsize) != 0) 1255 return (EFAULT); 1256 totwrt = size / sectorsize; 1257 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1258 1259 nsects = lp->d_partitions[part].p_size; 1260 sectoff = lp->d_partitions[part].p_offset; 1261 1262 /* Check transfer bounds against partition size. */ 1263 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1264 return (EINVAL); 1265 1266 /* Offset block number to start of partition. */ 1267 blkno += sectoff; 1268 1269 xs = &sx; 1270 1271 while (totwrt > 0) { 1272 nwrt = totwrt; /* XXX */ 1273 #ifndef SD_DUMP_NOT_TRUSTED 1274 /* 1275 * Fill out the scsi command 1276 */ 1277 bzero(&cmd, sizeof(cmd)); 1278 cmd.opcode = WRITE_BIG; 1279 _lto4b(blkno, cmd.addr); 1280 _lto2b(nwrt, cmd.length); 1281 /* 1282 * Fill out the scsipi_xfer structure 1283 * Note: we cannot sleep as we may be an interrupt 1284 * don't use scsipi_command() as it may want to wait 1285 * for an xs. 1286 */ 1287 bzero(xs, sizeof(sx)); 1288 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1289 XS_CTL_DATA_OUT; 1290 xs->xs_status = 0; 1291 xs->sc_link = sd->sc_link; 1292 xs->retries = SDRETRIES; 1293 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1294 xs->cmd = (struct scsipi_generic *)&cmd; 1295 xs->cmdlen = sizeof(cmd); 1296 xs->resid = nwrt * sectorsize; 1297 xs->error = XS_NOERROR; 1298 xs->bp = 0; 1299 xs->data = va; 1300 xs->datalen = nwrt * sectorsize; 1301 1302 /* 1303 * Pass all this info to the scsi driver. 1304 */ 1305 retval = scsipi_command_direct(xs); 1306 if (retval != COMPLETE) 1307 return (ENXIO); 1308 #else /* SD_DUMP_NOT_TRUSTED */ 1309 /* Let's just talk about this first... */ 1310 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1311 delay(500 * 1000); /* half a second */ 1312 #endif /* SD_DUMP_NOT_TRUSTED */ 1313 1314 /* update block count */ 1315 totwrt -= nwrt; 1316 blkno += nwrt; 1317 va += sectorsize * nwrt; 1318 } 1319 sddoingadump = 0; 1320 return (0); 1321 } 1322 #else /* __BDEVSW_DUMP_NEW_TYPE */ 1323 int 1324 sddump(dev, blkno, va, size) 1325 dev_t dev; 1326 daddr_t blkno; 1327 caddr_t va; 1328 size_t size; 1329 { 1330 1331 /* Not implemented. */ 1332 return (ENXIO); 1333 } 1334 #endif /* __BDEVSW_DUMP_NEW_TYPE */ 1335