1 /* $NetBSD: sd.c,v 1.164 2000/07/05 23:31:13 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 #ifdef __BROKEN_DK_ESTABLISH 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 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 void *v; 661 { 662 struct sd_softc *sd = v; 663 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 !(sc_link->quirks & SDEV_ONLYBIG)) { 723 /* 724 * We can fit in a small cdb. 725 */ 726 bzero(&cmd_small, sizeof(cmd_small)); 727 cmd_small.opcode = (bp->b_flags & B_READ) ? 728 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 729 _lto3b(bp->b_rawblkno, cmd_small.addr); 730 cmd_small.length = nblks & 0xff; 731 cmdlen = sizeof(cmd_small); 732 cmdp = (struct scsipi_generic *)&cmd_small; 733 } else 734 #endif 735 { 736 /* 737 * Need a large cdb. 738 */ 739 bzero(&cmd_big, sizeof(cmd_big)); 740 cmd_big.opcode = (bp->b_flags & B_READ) ? 741 READ_BIG : WRITE_BIG; 742 _lto4b(bp->b_rawblkno, cmd_big.addr); 743 _lto2b(nblks, cmd_big.length); 744 cmdlen = sizeof(cmd_big); 745 cmdp = (struct scsipi_generic *)&cmd_big; 746 } 747 748 /* Instrumentation. */ 749 disk_busy(&sd->sc_dk); 750 751 /* 752 * Mark the disk dirty so that the cache will be 753 * flushed on close. 754 */ 755 if ((bp->b_flags & B_READ) == 0) 756 sd->flags |= SDF_DIRTY; 757 758 /* 759 * Call the routine that chats with the adapter. 760 * Note: we cannot sleep as we may be an interrupt 761 * XXX Really need NOSLEEP? 762 */ 763 error = scsipi_command(sc_link, cmdp, cmdlen, 764 (u_char *)bp->b_data, bp->b_bcount, 765 SDRETRIES, 60000, bp, XS_CTL_NOSLEEP | XS_CTL_ASYNC | 766 ((bp->b_flags & B_READ) ? 767 XS_CTL_DATA_IN : XS_CTL_DATA_OUT)); 768 if (error) { 769 disk_unbusy(&sd->sc_dk, 0); 770 printf("%s: not queued, error %d\n", 771 sd->sc_dev.dv_xname, error); 772 } 773 } 774 } 775 776 void 777 sddone(xs) 778 struct scsipi_xfer *xs; 779 { 780 struct sd_softc *sd = xs->sc_link->device_softc; 781 782 if (sd->flags & SDF_FLUSHING) { 783 /* Flush completed, no longer dirty. */ 784 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 785 } 786 if (sd->flags & SDF_RESTART) { 787 sd->flags &= ~SDF_RESTART; 788 return; 789 } 790 791 if (xs->bp != NULL) { 792 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid); 793 #if NRND > 0 794 rnd_add_uint32(&sd->rnd_source, xs->bp->b_rawblkno); 795 #endif 796 } 797 } 798 799 void 800 sdminphys(bp) 801 struct buf *bp; 802 { 803 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 804 long max; 805 806 /* 807 * If the device is ancient, we want to make sure that 808 * the transfer fits into a 6-byte cdb. 809 * 810 * XXX Note that the SCSI-I spec says that 256-block transfers 811 * are allowed in a 6-byte read/write, and are specified 812 * by settng the "length" to 0. However, we're conservative 813 * here, allowing only 255-block transfers in case an 814 * ancient device gets confused by length == 0. A length of 0 815 * in a 10-byte read/write actually means 0 blocks. 816 */ 817 if (sd->flags & SDF_ANCIENT) { 818 max = sd->sc_dk.dk_label->d_secsize * 0xff; 819 820 if (bp->b_bcount > max) 821 bp->b_bcount = max; 822 } 823 824 (*sd->sc_link->adapter->scsipi_minphys)(bp); 825 } 826 827 int 828 sdread(dev, uio, ioflag) 829 dev_t dev; 830 struct uio *uio; 831 int ioflag; 832 { 833 834 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 835 } 836 837 int 838 sdwrite(dev, uio, ioflag) 839 dev_t dev; 840 struct uio *uio; 841 int ioflag; 842 { 843 844 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 845 } 846 847 /* 848 * Perform special action on behalf of the user 849 * Knows about the internals of this device 850 */ 851 int 852 sdioctl(dev, cmd, addr, flag, p) 853 dev_t dev; 854 u_long cmd; 855 caddr_t addr; 856 int flag; 857 struct proc *p; 858 { 859 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 860 int part = SDPART(dev); 861 int error; 862 863 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd)); 864 865 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 866 return (ENODEV); 867 868 /* 869 * If the device is not valid, some IOCTLs can still be 870 * handled on the raw partition. Check this here. 871 */ 872 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 873 switch (cmd) { 874 case DIOCKLABEL: 875 case DIOCWLABEL: 876 case DIOCLOCK: 877 case DIOCEJECT: 878 case ODIOCEJECT: 879 case SCIOCIDENTIFY: 880 case OSCIOCIDENTIFY: 881 case SCIOCCOMMAND: 882 case SCIOCDEBUG: 883 if (part == RAW_PART) 884 break; 885 /* FALLTHROUGH */ 886 default: 887 if ((sd->sc_link->flags & SDEV_OPEN) == 0) 888 return (ENODEV); 889 else 890 return (EIO); 891 } 892 } 893 894 switch (cmd) { 895 case DIOCGDINFO: 896 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 897 return (0); 898 899 case DIOCGPART: 900 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 901 ((struct partinfo *)addr)->part = 902 &sd->sc_dk.dk_label->d_partitions[part]; 903 return (0); 904 905 case DIOCWDINFO: 906 case DIOCSDINFO: 907 if ((flag & FWRITE) == 0) 908 return (EBADF); 909 910 if ((error = sdlock(sd)) != 0) 911 return (error); 912 sd->flags |= SDF_LABELLING; 913 914 error = setdisklabel(sd->sc_dk.dk_label, 915 (struct disklabel *)addr, /*sd->sc_dk.dk_openmask : */0, 916 sd->sc_dk.dk_cpulabel); 917 if (error == 0) { 918 if (cmd == DIOCWDINFO) 919 error = writedisklabel(SDLABELDEV(dev), 920 sdstrategy, sd->sc_dk.dk_label, 921 sd->sc_dk.dk_cpulabel); 922 } 923 924 sd->flags &= ~SDF_LABELLING; 925 sdunlock(sd); 926 return (error); 927 928 case DIOCKLABEL: 929 if (*(int *)addr) 930 sd->sc_link->flags |= SDEV_KEEP_LABEL; 931 else 932 sd->sc_link->flags &= ~SDEV_KEEP_LABEL; 933 return (0); 934 935 case DIOCWLABEL: 936 if ((flag & FWRITE) == 0) 937 return (EBADF); 938 if (*(int *)addr) 939 sd->flags |= SDF_WLABEL; 940 else 941 sd->flags &= ~SDF_WLABEL; 942 return (0); 943 944 case DIOCLOCK: 945 return (scsipi_prevent(sd->sc_link, 946 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 947 948 case DIOCEJECT: 949 if ((sd->sc_link->flags & SDEV_REMOVABLE) == 0) 950 return (ENOTTY); 951 if (*(int *)addr == 0) { 952 /* 953 * Don't force eject: check that we are the only 954 * partition open. If so, unlock it. 955 */ 956 if ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 957 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 958 sd->sc_dk.dk_openmask) { 959 error = scsipi_prevent(sd->sc_link, PR_ALLOW, 960 XS_CTL_IGNORE_NOT_READY); 961 if (error) 962 return (error); 963 } else { 964 return (EBUSY); 965 } 966 } 967 /* FALLTHROUGH */ 968 case ODIOCEJECT: 969 return ((sd->sc_link->flags & SDEV_REMOVABLE) == 0 ? ENOTTY : 970 scsipi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0)); 971 972 case DIOCGDEFLABEL: 973 sdgetdefaultlabel(sd, (struct disklabel *)addr); 974 return (0); 975 976 default: 977 if (part != RAW_PART) 978 return (ENOTTY); 979 return (scsipi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p)); 980 } 981 982 #ifdef DIAGNOSTIC 983 panic("sdioctl: impossible"); 984 #endif 985 } 986 987 void 988 sdgetdefaultlabel(sd, lp) 989 struct sd_softc *sd; 990 struct disklabel *lp; 991 { 992 993 bzero(lp, sizeof(struct disklabel)); 994 995 lp->d_secsize = sd->params.blksize; 996 lp->d_ntracks = sd->params.heads; 997 lp->d_nsectors = sd->params.sectors; 998 lp->d_ncylinders = sd->params.cyls; 999 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 1000 1001 switch (sd->sc_link->type) { 1002 #if NSD_SCSIBUS > 0 1003 case BUS_SCSI: 1004 lp->d_type = DTYPE_SCSI; 1005 break; 1006 #endif 1007 #if NSD_ATAPIBUS > 0 1008 case BUS_ATAPI: 1009 lp->d_type = DTYPE_ATAPI; 1010 break; 1011 #endif 1012 } 1013 strncpy(lp->d_typename, sd->name, 16); 1014 strncpy(lp->d_packname, "fictitious", 16); 1015 lp->d_secperunit = sd->params.disksize; 1016 lp->d_rpm = sd->params.rot_rate; 1017 lp->d_interleave = 1; 1018 lp->d_flags = 0; 1019 1020 lp->d_partitions[RAW_PART].p_offset = 0; 1021 lp->d_partitions[RAW_PART].p_size = 1022 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1023 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1024 lp->d_npartitions = RAW_PART + 1; 1025 1026 lp->d_magic = DISKMAGIC; 1027 lp->d_magic2 = DISKMAGIC; 1028 lp->d_checksum = dkcksum(lp); 1029 } 1030 1031 1032 /* 1033 * Load the label information on the named device 1034 */ 1035 void 1036 sdgetdisklabel(sd) 1037 struct sd_softc *sd; 1038 { 1039 struct disklabel *lp = sd->sc_dk.dk_label; 1040 char *errstring; 1041 1042 bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel)); 1043 1044 sdgetdefaultlabel(sd, lp); 1045 1046 if (lp->d_secpercyl == 0) { 1047 lp->d_secpercyl = 100; 1048 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1049 } 1050 1051 /* 1052 * Call the generic disklabel extraction routine 1053 */ 1054 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1055 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1056 if (errstring) { 1057 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1058 return; 1059 } 1060 } 1061 1062 void 1063 sd_shutdown(arg) 1064 void *arg; 1065 { 1066 struct sd_softc *sd = arg; 1067 1068 /* 1069 * If the disk cache needs to be flushed, and the disk supports 1070 * it, flush it. We're cold at this point, so we poll for 1071 * completion. 1072 */ 1073 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1074 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1075 printf("%s: cache synchronization failed\n", 1076 sd->sc_dev.dv_xname); 1077 sd->flags &= ~SDF_FLUSHING; 1078 } else 1079 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1080 } 1081 } 1082 1083 /* 1084 * Tell the device to map out a defective block 1085 */ 1086 int 1087 sd_reassign_blocks(sd, blkno) 1088 struct sd_softc *sd; 1089 u_long blkno; 1090 { 1091 struct scsi_reassign_blocks scsipi_cmd; 1092 struct scsi_reassign_blocks_data rbdata; 1093 1094 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 1095 bzero(&rbdata, sizeof(rbdata)); 1096 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1097 1098 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1099 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1100 1101 return (scsipi_command(sd->sc_link, 1102 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1103 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1104 XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); 1105 } 1106 1107 /* 1108 * Check Errors 1109 */ 1110 int 1111 sd_interpret_sense(xs) 1112 struct scsipi_xfer *xs; 1113 { 1114 struct scsipi_link *sc_link = xs->sc_link; 1115 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1116 struct sd_softc *sd = sc_link->device_softc; 1117 int retval = SCSIRET_CONTINUE; 1118 1119 /* 1120 * If the device is not open yet, let the generic code handle it. 1121 */ 1122 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 1123 return (retval); 1124 } 1125 1126 /* 1127 * If it isn't a extended or extended/deferred error, let 1128 * the generic code handle it. 1129 */ 1130 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1131 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1132 return (retval); 1133 } 1134 1135 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1136 sense->add_sense_code == 0x4) { 1137 if (sense->add_sense_code_qual == 0x01) { 1138 printf("%s: ..is spinning up...waiting\n", 1139 sd->sc_dev.dv_xname); 1140 /* 1141 * I really need a sdrestart function I can call here. 1142 */ 1143 delay(1000000 * 5); /* 5 seconds */ 1144 retval = SCSIRET_RETRY; 1145 } else if ((sense->add_sense_code_qual == 0x2) && 1146 (sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 1147 if (sd->sc_link->flags & SDEV_REMOVABLE) { 1148 printf( 1149 "%s: removable disk stopped - not restarting\n", 1150 sd->sc_dev.dv_xname); 1151 retval = EIO; 1152 } else { 1153 if (sd->flags & SDF_RESTART) 1154 return SCSIRET_RETRY; 1155 sd->flags |= SDF_RESTART; 1156 printf("%s: respinning up disk\n", 1157 sd->sc_dev.dv_xname); 1158 retval = scsipi_start(sd->sc_link, SSS_START, 1159 XS_CTL_URGENT | XS_CTL_NOSLEEP | 1160 ((xs->xs_control & XS_CTL_ASYNC) ? 1161 XS_CTL_ASYNC : 0)); 1162 if ((xs->xs_control & XS_CTL_ASYNC) == 0) 1163 sd->flags &= ~SDF_RESTART; 1164 if (retval != 0) { 1165 printf( 1166 "%s: respin of disk failed - %d\n", 1167 sd->sc_dev.dv_xname, retval); 1168 retval = EIO; 1169 } else { 1170 retval = SCSIRET_RETRY; 1171 } 1172 } 1173 } 1174 } 1175 return (retval); 1176 } 1177 1178 1179 int 1180 sdsize(dev) 1181 dev_t dev; 1182 { 1183 struct sd_softc *sd; 1184 int part, unit, omask; 1185 int size; 1186 1187 unit = SDUNIT(dev); 1188 if (unit >= sd_cd.cd_ndevs) 1189 return (-1); 1190 sd = sd_cd.cd_devs[unit]; 1191 if (sd == NULL) 1192 return (-1); 1193 1194 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1195 return (-1); 1196 1197 part = SDPART(dev); 1198 omask = sd->sc_dk.dk_openmask & (1 << part); 1199 1200 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1201 return (-1); 1202 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) 1203 size = -1; 1204 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1205 size = -1; 1206 else 1207 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1208 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1209 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1210 return (-1); 1211 return (size); 1212 } 1213 1214 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1215 static struct scsipi_xfer sx; 1216 static int sddoingadump; 1217 1218 /* 1219 * dump all of physical memory into the partition specified, starting 1220 * at offset 'dumplo' into the partition. 1221 */ 1222 int 1223 sddump(dev, blkno, va, size) 1224 dev_t dev; 1225 daddr_t blkno; 1226 caddr_t va; 1227 size_t size; 1228 { 1229 struct sd_softc *sd; /* disk unit to do the I/O */ 1230 struct disklabel *lp; /* disk's disklabel */ 1231 int unit, part; 1232 int sectorsize; /* size of a disk sector */ 1233 int nsects; /* number of sectors in partition */ 1234 int sectoff; /* sector offset of partition */ 1235 int totwrt; /* total number of sectors left to write */ 1236 int nwrt; /* current number of sectors to write */ 1237 struct scsipi_rw_big cmd; /* write command */ 1238 struct scsipi_xfer *xs; /* ... convenience */ 1239 int retval; 1240 1241 /* Check if recursive dump; if so, punt. */ 1242 if (sddoingadump) 1243 return (EFAULT); 1244 1245 /* Mark as active early. */ 1246 sddoingadump = 1; 1247 1248 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1249 part = SDPART(dev); 1250 1251 /* Check for acceptable drive number. */ 1252 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1253 return (ENXIO); 1254 1255 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1256 return (ENODEV); 1257 1258 /* Make sure it was initialized. */ 1259 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED) 1260 return (ENXIO); 1261 1262 /* Convert to disk sectors. Request must be a multiple of size. */ 1263 lp = sd->sc_dk.dk_label; 1264 sectorsize = lp->d_secsize; 1265 if ((size % sectorsize) != 0) 1266 return (EFAULT); 1267 totwrt = size / sectorsize; 1268 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1269 1270 nsects = lp->d_partitions[part].p_size; 1271 sectoff = lp->d_partitions[part].p_offset; 1272 1273 /* Check transfer bounds against partition size. */ 1274 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1275 return (EINVAL); 1276 1277 /* Offset block number to start of partition. */ 1278 blkno += sectoff; 1279 1280 xs = &sx; 1281 1282 while (totwrt > 0) { 1283 nwrt = totwrt; /* XXX */ 1284 #ifndef SD_DUMP_NOT_TRUSTED 1285 /* 1286 * Fill out the scsi command 1287 */ 1288 bzero(&cmd, sizeof(cmd)); 1289 cmd.opcode = WRITE_BIG; 1290 _lto4b(blkno, cmd.addr); 1291 _lto2b(nwrt, cmd.length); 1292 /* 1293 * Fill out the scsipi_xfer structure 1294 * Note: we cannot sleep as we may be an interrupt 1295 * don't use scsipi_command() as it may want to wait 1296 * for an xs. 1297 */ 1298 bzero(xs, sizeof(sx)); 1299 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1300 XS_CTL_DATA_OUT; 1301 xs->xs_status = 0; 1302 xs->sc_link = sd->sc_link; 1303 xs->retries = SDRETRIES; 1304 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1305 xs->cmd = (struct scsipi_generic *)&cmd; 1306 xs->cmdlen = sizeof(cmd); 1307 xs->resid = nwrt * sectorsize; 1308 xs->error = XS_NOERROR; 1309 xs->bp = 0; 1310 xs->data = va; 1311 xs->datalen = nwrt * sectorsize; 1312 1313 /* 1314 * Pass all this info to the scsi driver. 1315 */ 1316 retval = scsipi_command_direct(xs); 1317 if (retval != COMPLETE) 1318 return (ENXIO); 1319 #else /* SD_DUMP_NOT_TRUSTED */ 1320 /* Let's just talk about this first... */ 1321 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1322 delay(500 * 1000); /* half a second */ 1323 #endif /* SD_DUMP_NOT_TRUSTED */ 1324 1325 /* update block count */ 1326 totwrt -= nwrt; 1327 blkno += nwrt; 1328 va += sectorsize * nwrt; 1329 } 1330 sddoingadump = 0; 1331 return (0); 1332 } 1333