1 /* $NetBSD: sd.c,v 1.154 1999/12/23 21:23:30 leo 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 /* 141 * Store information needed to contact our base driver 142 */ 143 sd->sc_link = sc_link; 144 sd->sc_ops = ops; 145 sc_link->device = &sd_switch; 146 sc_link->device_softc = sd; 147 if (sc_link->openings > SDOUTSTANDING) 148 sc_link->openings = SDOUTSTANDING; 149 150 /* 151 * Initialize and attach the disk structure. 152 */ 153 sd->sc_dk.dk_driver = &sddkdriver; 154 sd->sc_dk.dk_name = sd->sc_dev.dv_xname; 155 disk_attach(&sd->sc_dk); 156 157 #if !defined(__i386__) && !defined(__vax__) 158 dk_establish(&sd->sc_dk, &sd->sc_dev); /* XXX */ 159 #endif 160 161 /* 162 * Use the subdriver to request information regarding 163 * the drive. We cannot use interrupts yet, so the 164 * request must specify this. 165 */ 166 printf("\n"); 167 168 error = scsipi_start(sd->sc_link, SSS_START, 169 XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST | 170 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 171 172 if (error) 173 result = SDGP_RESULT_OFFLINE; 174 else 175 result = (*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 176 XS_CTL_DISCOVERY); 177 printf("%s: ", sd->sc_dev.dv_xname); 178 switch (result) { 179 case SDGP_RESULT_OK: 180 format_bytes(pbuf, sizeof(pbuf), 181 (u_int64_t)dp->disksize * dp->blksize); 182 printf( 183 "%s, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %ld sectors", 184 pbuf, dp->cyls, dp->heads, dp->sectors, dp->blksize, 185 dp->disksize); 186 break; 187 188 case SDGP_RESULT_OFFLINE: 189 printf("drive offline"); 190 break; 191 192 case SDGP_RESULT_UNFORMATTED: 193 printf("unformatted media"); 194 break; 195 196 #ifdef DIAGNOSTIC 197 default: 198 panic("sdattach: unknown result from get_parms"); 199 break; 200 #endif 201 } 202 printf("\n"); 203 204 /* 205 * Establish a shutdown hook so that we can ensure that 206 * our data has actually made it onto the platter at 207 * shutdown time. Note that this relies on the fact 208 * that the shutdown hook code puts us at the head of 209 * the list (thus guaranteeing that our hook runs before 210 * our ancestors'). 211 */ 212 if ((sd->sc_sdhook = 213 shutdownhook_establish(sd_shutdown, sd)) == NULL) 214 printf("%s: WARNING: unable to establish shutdown hook\n", 215 sd->sc_dev.dv_xname); 216 217 #if NRND > 0 218 /* 219 * attach the device into the random source list 220 */ 221 rnd_attach_source(&sd->rnd_source, sd->sc_dev.dv_xname, 222 RND_TYPE_DISK, 0); 223 #endif 224 } 225 226 int 227 sdactivate(self, act) 228 struct device *self; 229 enum devact act; 230 { 231 int rv = 0; 232 233 switch (act) { 234 case DVACT_ACTIVATE: 235 rv = EOPNOTSUPP; 236 break; 237 238 case DVACT_DEACTIVATE: 239 /* 240 * Nothing to do; we key off the device's DVF_ACTIVE. 241 */ 242 break; 243 } 244 return (rv); 245 } 246 247 int 248 sddetach(self, flags) 249 struct device *self; 250 int flags; 251 { 252 struct sd_softc *sd = (struct sd_softc *) self; 253 struct buf *bp; 254 int s, bmaj, cmaj, mn; 255 256 /* locate the major number */ 257 for (bmaj = 0; bmaj <= nblkdev; bmaj++) 258 if (bdevsw[bmaj].d_open == sdopen) 259 break; 260 for (cmaj = 0; cmaj <= nchrdev; cmaj++) 261 if (cdevsw[cmaj].d_open == sdopen) 262 break; 263 264 s = splbio(); 265 266 /* Kill off any queued buffers. */ 267 while ((bp = sd->buf_queue.b_actf) != NULL) { 268 sd->buf_queue.b_actf = bp->b_actf; 269 bp->b_error = EIO; 270 bp->b_flags |= B_ERROR; 271 bp->b_resid = bp->b_bcount; 272 biodone(bp); 273 } 274 275 /* Kill off any pending commands. */ 276 scsipi_kill_pending(sd->sc_link); 277 278 splx(s); 279 280 /* Nuke the the vnodes for any open instances */ 281 mn = SDMINOR(self->dv_unit, 0); 282 vdevgone(bmaj, mn, mn + (MAXPARTITIONS - 1), VBLK); 283 vdevgone(cmaj, mn, mn + (MAXPARTITIONS - 1), VCHR); 284 285 /* Detach from the disk list. */ 286 disk_detach(&sd->sc_dk); 287 288 /* Get rid of the shutdown hook. */ 289 shutdownhook_disestablish(sd->sc_sdhook); 290 291 #if NRND > 0 292 /* Unhook the entropy source. */ 293 rnd_detach_source(&sd->rnd_source); 294 #endif 295 296 return (0); 297 } 298 299 /* 300 * Wait interruptibly for an exclusive lock. 301 * 302 * XXX 303 * Several drivers do this; it should be abstracted and made MP-safe. 304 */ 305 int 306 sdlock(sd) 307 struct sd_softc *sd; 308 { 309 int error; 310 311 while ((sd->flags & SDF_LOCKED) != 0) { 312 sd->flags |= SDF_WANTED; 313 if ((error = tsleep(sd, PRIBIO | PCATCH, "sdlck", 0)) != 0) 314 return (error); 315 } 316 sd->flags |= SDF_LOCKED; 317 return (0); 318 } 319 320 /* 321 * Unlock and wake up any waiters. 322 */ 323 void 324 sdunlock(sd) 325 struct sd_softc *sd; 326 { 327 328 sd->flags &= ~SDF_LOCKED; 329 if ((sd->flags & SDF_WANTED) != 0) { 330 sd->flags &= ~SDF_WANTED; 331 wakeup(sd); 332 } 333 } 334 335 /* 336 * open the device. Make sure the partition info is a up-to-date as can be. 337 */ 338 int 339 sdopen(dev, flag, fmt, p) 340 dev_t dev; 341 int flag, fmt; 342 struct proc *p; 343 { 344 struct sd_softc *sd; 345 struct scsipi_link *sc_link; 346 int unit, part; 347 int error; 348 349 unit = SDUNIT(dev); 350 if (unit >= sd_cd.cd_ndevs) 351 return (ENXIO); 352 sd = sd_cd.cd_devs[unit]; 353 if (sd == NULL) 354 return (ENXIO); 355 356 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 357 return (ENODEV); 358 359 sc_link = sd->sc_link; 360 part = SDPART(dev); 361 362 SC_DEBUG(sc_link, SDEV_DB1, 363 ("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit, 364 sd_cd.cd_ndevs, part)); 365 366 /* 367 * If this is the first open of this device, add a reference 368 * to the adapter. 369 */ 370 if (sd->sc_dk.dk_openmask == 0 && 371 (error = scsipi_adapter_addref(sc_link)) != 0) 372 return (error); 373 374 if ((error = sdlock(sd)) != 0) 375 goto bad4; 376 377 if ((sc_link->flags & SDEV_OPEN) != 0) { 378 /* 379 * If any partition is open, but the disk has been invalidated, 380 * disallow further opens of non-raw partition 381 */ 382 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0 && 383 (part != RAW_PART || fmt != S_IFCHR)) { 384 error = EIO; 385 goto bad3; 386 } 387 } else { 388 /* Check that it is still responding and ok. */ 389 error = scsipi_test_unit_ready(sc_link, 390 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE | 391 XS_CTL_IGNORE_NOT_READY); 392 if (error) 393 goto bad3; 394 395 /* 396 * Start the pack spinning if necessary. Always allow the 397 * raw parition to be opened, for raw IOCTLs. Data transfers 398 * will check for SDEV_MEDIA_LOADED. 399 */ 400 error = scsipi_start(sc_link, SSS_START, 401 XS_CTL_IGNORE_ILLEGAL_REQUEST | 402 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_SILENT); 403 if (error) { 404 if (part != RAW_PART || fmt != S_IFCHR) 405 goto bad3; 406 else 407 goto out; 408 } 409 410 sc_link->flags |= SDEV_OPEN; 411 412 /* Lock the pack in. */ 413 error = scsipi_prevent(sc_link, PR_PREVENT, 414 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE); 415 if (error) 416 goto bad; 417 418 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 419 sc_link->flags |= SDEV_MEDIA_LOADED; 420 421 /* 422 * Load the physical device parameters. 423 * 424 * Note that if media is present but unformatted, 425 * we allow the open (so that it can be formatted!). 426 * The drive should refuse real I/O, if the media is 427 * unformatted. 428 */ 429 if ((*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 430 0) == SDGP_RESULT_OFFLINE) { 431 error = ENXIO; 432 goto bad2; 433 } 434 SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded ")); 435 436 /* Load the partition info if not already loaded. */ 437 sdgetdisklabel(sd); 438 SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded ")); 439 } 440 } 441 442 /* Check that the partition exists. */ 443 if (part != RAW_PART && 444 (part >= sd->sc_dk.dk_label->d_npartitions || 445 sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 446 error = ENXIO; 447 goto bad; 448 } 449 450 out: /* Insure only one open at a time. */ 451 switch (fmt) { 452 case S_IFCHR: 453 sd->sc_dk.dk_copenmask |= (1 << part); 454 break; 455 case S_IFBLK: 456 sd->sc_dk.dk_bopenmask |= (1 << part); 457 break; 458 } 459 sd->sc_dk.dk_openmask = 460 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 461 462 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 463 sdunlock(sd); 464 return (0); 465 466 bad2: 467 sc_link->flags &= ~SDEV_MEDIA_LOADED; 468 469 bad: 470 if (sd->sc_dk.dk_openmask == 0) { 471 scsipi_prevent(sc_link, PR_ALLOW, 472 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE); 473 sc_link->flags &= ~SDEV_OPEN; 474 } 475 476 bad3: 477 sdunlock(sd); 478 bad4: 479 if (sd->sc_dk.dk_openmask == 0) 480 scsipi_adapter_delref(sc_link); 481 return (error); 482 } 483 484 /* 485 * close the device.. only called if we are the LAST occurence of an open 486 * device. Convenient now but usually a pain. 487 */ 488 int 489 sdclose(dev, flag, fmt, p) 490 dev_t dev; 491 int flag, fmt; 492 struct proc *p; 493 { 494 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 495 int part = SDPART(dev); 496 int error; 497 498 if ((error = sdlock(sd)) != 0) 499 return (error); 500 501 switch (fmt) { 502 case S_IFCHR: 503 sd->sc_dk.dk_copenmask &= ~(1 << part); 504 break; 505 case S_IFBLK: 506 sd->sc_dk.dk_bopenmask &= ~(1 << part); 507 break; 508 } 509 sd->sc_dk.dk_openmask = 510 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 511 512 if (sd->sc_dk.dk_openmask == 0) { 513 /* 514 * If the disk cache needs flushing, and the disk supports 515 * it, do it now. 516 */ 517 if ((sd->flags & SDF_DIRTY) != 0 && 518 sd->sc_ops->sdo_flush != NULL) { 519 if ((*sd->sc_ops->sdo_flush)(sd, 0)) { 520 printf("%s: cache synchronization failed\n", 521 sd->sc_dev.dv_xname); 522 sd->flags &= ~SDF_FLUSHING; 523 } else 524 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 525 } 526 527 scsipi_wait_drain(sd->sc_link); 528 529 scsipi_prevent(sd->sc_link, PR_ALLOW, 530 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 531 sd->sc_link->flags &= ~SDEV_OPEN; 532 533 if (! (sd->sc_link->flags & SDEV_KEEP_LABEL)) 534 sd->sc_link->flags &= ~SDEV_MEDIA_LOADED; 535 536 scsipi_wait_drain(sd->sc_link); 537 538 scsipi_adapter_delref(sd->sc_link); 539 } 540 541 sdunlock(sd); 542 return (0); 543 } 544 545 /* 546 * Actually translate the requested transfer into one the physical driver 547 * can understand. The transfer is described by a buf and will include 548 * only one physical transfer. 549 */ 550 void 551 sdstrategy(bp) 552 struct buf *bp; 553 { 554 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 555 int s; 556 557 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy ")); 558 SC_DEBUG(sd->sc_link, SDEV_DB1, 559 ("%ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 560 /* 561 * If the device has been made invalid, error out 562 */ 563 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0 || 564 (sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) { 565 if (sd->sc_link->flags & SDEV_OPEN) 566 bp->b_error = EIO; 567 else 568 bp->b_error = ENODEV; 569 goto bad; 570 } 571 /* 572 * The transfer must be a whole number of blocks, offset must not be 573 * negative. 574 */ 575 if ((bp->b_bcount % sd->sc_dk.dk_label->d_secsize) != 0 || 576 bp->b_blkno < 0) { 577 bp->b_error = EINVAL; 578 goto bad; 579 } 580 /* 581 * If it's a null transfer, return immediatly 582 */ 583 if (bp->b_bcount == 0) 584 goto done; 585 586 /* 587 * Do bounds checking, adjust transfer. if error, process. 588 * If end of partition, just return. 589 */ 590 if (SDPART(bp->b_dev) != RAW_PART && 591 bounds_check_with_label(bp, sd->sc_dk.dk_label, 592 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 593 goto done; 594 595 s = splbio(); 596 597 /* 598 * Place it in the queue of disk activities for this disk 599 */ 600 disksort(&sd->buf_queue, bp); 601 602 /* 603 * Tell the device to get going on the transfer if it's 604 * not doing anything, otherwise just wait for completion 605 */ 606 sdstart(sd); 607 608 splx(s); 609 return; 610 611 bad: 612 bp->b_flags |= B_ERROR; 613 done: 614 /* 615 * Correctly set the buf to indicate a completed xfer 616 */ 617 bp->b_resid = bp->b_bcount; 618 biodone(bp); 619 } 620 621 /* 622 * sdstart looks to see if there is a buf waiting for the device 623 * and that the device is not already busy. If both are true, 624 * It dequeues the buf and creates a scsi command to perform the 625 * transfer in the buf. The transfer request will call scsipi_done 626 * on completion, which will in turn call this routine again 627 * so that the next queued transfer is performed. 628 * The bufs are queued by the strategy routine (sdstrategy) 629 * 630 * This routine is also called after other non-queued requests 631 * have been made of the scsi driver, to ensure that the queue 632 * continues to be drained. 633 * 634 * must be called at the correct (highish) spl level 635 * sdstart() is called at splbio from sdstrategy and scsipi_done 636 */ 637 void 638 sdstart(v) 639 register void *v; 640 { 641 register struct sd_softc *sd = v; 642 register struct scsipi_link *sc_link = sd->sc_link; 643 struct disklabel *lp = sd->sc_dk.dk_label; 644 struct buf *bp = 0; 645 struct buf *dp; 646 struct scsipi_rw_big cmd_big; 647 #if NSD_SCSIBUS > 0 648 struct scsi_rw cmd_small; 649 #endif 650 struct scsipi_generic *cmdp; 651 int blkno, nblks, cmdlen, error; 652 struct partition *p; 653 654 SC_DEBUG(sc_link, SDEV_DB2, ("sdstart ")); 655 /* 656 * Check if the device has room for another command 657 */ 658 while (sc_link->active < sc_link->openings) { 659 /* 660 * there is excess capacity, but a special waits 661 * It'll need the adapter as soon as we clear out of the 662 * way and let it run (user level wait). 663 */ 664 if (sc_link->flags & SDEV_WAITING) { 665 sc_link->flags &= ~SDEV_WAITING; 666 wakeup((caddr_t)sc_link); 667 return; 668 } 669 670 /* 671 * See if there is a buf with work for us to do.. 672 */ 673 dp = &sd->buf_queue; 674 if ((bp = dp->b_actf) == NULL) /* yes, an assign */ 675 return; 676 dp->b_actf = bp->b_actf; 677 678 /* 679 * If the device has become invalid, abort all the 680 * reads and writes until all files have been closed and 681 * re-opened 682 */ 683 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 684 bp->b_error = EIO; 685 bp->b_flags |= B_ERROR; 686 bp->b_resid = bp->b_bcount; 687 biodone(bp); 688 continue; 689 } 690 691 /* 692 * We have a buf, now we should make a command 693 * 694 * First, translate the block to absolute and put it in terms 695 * of the logical blocksize of the device. 696 */ 697 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 698 if (SDPART(bp->b_dev) != RAW_PART) { 699 p = &lp->d_partitions[SDPART(bp->b_dev)]; 700 blkno += p->p_offset; 701 } 702 nblks = howmany(bp->b_bcount, lp->d_secsize); 703 704 #if NSD_SCSIBUS > 0 705 /* 706 * Fill out the scsi command. If the transfer will 707 * fit in a "small" cdb, use it. 708 */ 709 if (((blkno & 0x1fffff) == blkno) && 710 ((nblks & 0xff) == nblks) && sc_link->type == BUS_SCSI) { 711 /* 712 * We can fit in a small cdb. 713 */ 714 bzero(&cmd_small, sizeof(cmd_small)); 715 cmd_small.opcode = (bp->b_flags & B_READ) ? 716 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 717 _lto3b(blkno, cmd_small.addr); 718 cmd_small.length = nblks & 0xff; 719 cmdlen = sizeof(cmd_small); 720 cmdp = (struct scsipi_generic *)&cmd_small; 721 } else 722 #endif 723 { 724 /* 725 * Need a large cdb. 726 */ 727 bzero(&cmd_big, sizeof(cmd_big)); 728 cmd_big.opcode = (bp->b_flags & B_READ) ? 729 READ_BIG : WRITE_BIG; 730 _lto4b(blkno, cmd_big.addr); 731 _lto2b(nblks, cmd_big.length); 732 cmdlen = sizeof(cmd_big); 733 cmdp = (struct scsipi_generic *)&cmd_big; 734 } 735 736 /* Instrumentation. */ 737 disk_busy(&sd->sc_dk); 738 739 /* 740 * Mark the disk dirty so that the cache will be 741 * flushed on close. 742 */ 743 if ((bp->b_flags & B_READ) == 0) 744 sd->flags |= SDF_DIRTY; 745 746 /* 747 * Call the routine that chats with the adapter. 748 * Note: we cannot sleep as we may be an interrupt 749 * XXX Really need NOSLEEP? 750 */ 751 error = scsipi_command(sc_link, cmdp, cmdlen, 752 (u_char *)bp->b_data, bp->b_bcount, 753 SDRETRIES, 60000, bp, XS_CTL_NOSLEEP | XS_CTL_ASYNC | 754 ((bp->b_flags & B_READ) ? 755 XS_CTL_DATA_IN : XS_CTL_DATA_OUT)); 756 if (error) { 757 disk_unbusy(&sd->sc_dk, 0); 758 printf("%s: not queued, error %d\n", 759 sd->sc_dev.dv_xname, error); 760 } 761 } 762 } 763 764 void 765 sddone(xs) 766 struct scsipi_xfer *xs; 767 { 768 struct sd_softc *sd = xs->sc_link->device_softc; 769 770 if (sd->flags & SDF_FLUSHING) { 771 /* Flush completed, no longer dirty. */ 772 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 773 } 774 775 if (xs->bp != NULL) { 776 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid); 777 #if NRND > 0 778 rnd_add_uint32(&sd->rnd_source, xs->bp->b_blkno); 779 #endif 780 } 781 } 782 783 void 784 sdminphys(bp) 785 struct buf *bp; 786 { 787 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 788 long max; 789 790 /* 791 * If the device is ancient, we want to make sure that 792 * the transfer fits into a 6-byte cdb. 793 * 794 * XXX Note that the SCSI-I spec says that 256-block transfers 795 * are allowed in a 6-byte read/write, and are specified 796 * by settng the "length" to 0. However, we're conservative 797 * here, allowing only 255-block transfers in case an 798 * ancient device gets confused by length == 0. A length of 0 799 * in a 10-byte read/write actually means 0 blocks. 800 */ 801 if (sd->flags & SDF_ANCIENT) { 802 max = sd->sc_dk.dk_label->d_secsize * 0xff; 803 804 if (bp->b_bcount > max) 805 bp->b_bcount = max; 806 } 807 808 (*sd->sc_link->adapter->scsipi_minphys)(bp); 809 } 810 811 int 812 sdread(dev, uio, ioflag) 813 dev_t dev; 814 struct uio *uio; 815 int ioflag; 816 { 817 818 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 819 } 820 821 int 822 sdwrite(dev, uio, ioflag) 823 dev_t dev; 824 struct uio *uio; 825 int ioflag; 826 { 827 828 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 829 } 830 831 /* 832 * Perform special action on behalf of the user 833 * Knows about the internals of this device 834 */ 835 int 836 sdioctl(dev, cmd, addr, flag, p) 837 dev_t dev; 838 u_long cmd; 839 caddr_t addr; 840 int flag; 841 struct proc *p; 842 { 843 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 844 int part = SDPART(dev); 845 int error; 846 847 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd)); 848 849 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 850 return (ENODEV); 851 852 /* 853 * If the device is not valid, some IOCTLs can still be 854 * handled on the raw partition. Check this here. 855 */ 856 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 857 switch (cmd) { 858 case DIOCKLABEL: 859 case DIOCWLABEL: 860 case DIOCLOCK: 861 case DIOCEJECT: 862 case ODIOCEJECT: 863 case SCIOCIDENTIFY: 864 case OSCIOCIDENTIFY: 865 case SCIOCCOMMAND: 866 case SCIOCDEBUG: 867 if (part == RAW_PART) 868 break; 869 /* FALLTHROUGH */ 870 default: 871 if ((sd->sc_link->flags & SDEV_OPEN) == 0) 872 return (ENODEV); 873 else 874 return (EIO); 875 } 876 } 877 878 switch (cmd) { 879 case DIOCGDINFO: 880 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 881 return (0); 882 883 case DIOCGPART: 884 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 885 ((struct partinfo *)addr)->part = 886 &sd->sc_dk.dk_label->d_partitions[part]; 887 return (0); 888 889 case DIOCWDINFO: 890 case DIOCSDINFO: 891 if ((flag & FWRITE) == 0) 892 return (EBADF); 893 894 if ((error = sdlock(sd)) != 0) 895 return (error); 896 sd->flags |= SDF_LABELLING; 897 898 error = setdisklabel(sd->sc_dk.dk_label, 899 (struct disklabel *)addr, /*sd->sc_dk.dk_openmask : */0, 900 sd->sc_dk.dk_cpulabel); 901 if (error == 0) { 902 if (cmd == DIOCWDINFO) 903 error = writedisklabel(SDLABELDEV(dev), 904 sdstrategy, sd->sc_dk.dk_label, 905 sd->sc_dk.dk_cpulabel); 906 } 907 908 sd->flags &= ~SDF_LABELLING; 909 sdunlock(sd); 910 return (error); 911 912 case DIOCKLABEL: 913 if (*(int *)addr) 914 sd->sc_link->flags |= SDEV_KEEP_LABEL; 915 else 916 sd->sc_link->flags &= ~SDEV_KEEP_LABEL; 917 return (0); 918 919 case DIOCWLABEL: 920 if ((flag & FWRITE) == 0) 921 return (EBADF); 922 if (*(int *)addr) 923 sd->flags |= SDF_WLABEL; 924 else 925 sd->flags &= ~SDF_WLABEL; 926 return (0); 927 928 case DIOCLOCK: 929 return (scsipi_prevent(sd->sc_link, 930 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 931 932 case DIOCEJECT: 933 if ((sd->sc_link->flags & SDEV_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 ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 941 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 942 sd->sc_dk.dk_openmask) { 943 error = scsipi_prevent(sd->sc_link, PR_ALLOW, 944 XS_CTL_IGNORE_NOT_READY); 945 if (error) 946 return (error); 947 } else { 948 return (EBUSY); 949 } 950 } 951 /* FALLTHROUGH */ 952 case ODIOCEJECT: 953 return ((sd->sc_link->flags & SDEV_REMOVABLE) == 0 ? ENOTTY : 954 scsipi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0)); 955 956 case DIOCGDEFLABEL: 957 sdgetdefaultlabel(sd, (struct disklabel *)addr); 958 return (0); 959 960 default: 961 if (part != RAW_PART) 962 return (ENOTTY); 963 return (scsipi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p)); 964 } 965 966 #ifdef DIAGNOSTIC 967 panic("sdioctl: impossible"); 968 #endif 969 } 970 971 void 972 sdgetdefaultlabel(sd, lp) 973 struct sd_softc *sd; 974 struct disklabel *lp; 975 { 976 977 bzero(lp, sizeof(struct disklabel)); 978 979 lp->d_secsize = sd->params.blksize; 980 lp->d_ntracks = sd->params.heads; 981 lp->d_nsectors = sd->params.sectors; 982 lp->d_ncylinders = sd->params.cyls; 983 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 984 985 switch (sd->sc_link->type) { 986 #if NSD_SCSIBUS > 0 987 case BUS_SCSI: 988 lp->d_type = DTYPE_SCSI; 989 break; 990 #endif 991 #if NSD_ATAPIBUS > 0 992 case BUS_ATAPI: 993 lp->d_type = DTYPE_ATAPI; 994 break; 995 #endif 996 } 997 strncpy(lp->d_typename, sd->name, 16); 998 strncpy(lp->d_packname, "fictitious", 16); 999 lp->d_secperunit = sd->params.disksize; 1000 lp->d_rpm = sd->params.rot_rate; 1001 lp->d_interleave = 1; 1002 lp->d_flags = 0; 1003 1004 lp->d_partitions[RAW_PART].p_offset = 0; 1005 lp->d_partitions[RAW_PART].p_size = 1006 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1007 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1008 lp->d_npartitions = RAW_PART + 1; 1009 1010 lp->d_magic = DISKMAGIC; 1011 lp->d_magic2 = DISKMAGIC; 1012 lp->d_checksum = dkcksum(lp); 1013 } 1014 1015 1016 /* 1017 * Load the label information on the named device 1018 */ 1019 void 1020 sdgetdisklabel(sd) 1021 struct sd_softc *sd; 1022 { 1023 struct disklabel *lp = sd->sc_dk.dk_label; 1024 char *errstring; 1025 1026 bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel)); 1027 1028 sdgetdefaultlabel(sd, lp); 1029 1030 if (lp->d_secpercyl == 0) { 1031 lp->d_secpercyl = 100; 1032 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1033 } 1034 1035 /* 1036 * Call the generic disklabel extraction routine 1037 */ 1038 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1039 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1040 if (errstring) { 1041 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1042 return; 1043 } 1044 } 1045 1046 void 1047 sd_shutdown(arg) 1048 void *arg; 1049 { 1050 struct sd_softc *sd = arg; 1051 1052 /* 1053 * If the disk cache needs to be flushed, and the disk supports 1054 * it, flush it. We're cold at this point, so we poll for 1055 * completion. 1056 */ 1057 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1058 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1059 printf("%s: cache synchronization failed\n", 1060 sd->sc_dev.dv_xname); 1061 sd->flags &= ~SDF_FLUSHING; 1062 } else 1063 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1064 } 1065 } 1066 1067 /* 1068 * Tell the device to map out a defective block 1069 */ 1070 int 1071 sd_reassign_blocks(sd, blkno) 1072 struct sd_softc *sd; 1073 u_long blkno; 1074 { 1075 struct scsi_reassign_blocks scsipi_cmd; 1076 struct scsi_reassign_blocks_data rbdata; 1077 1078 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 1079 bzero(&rbdata, sizeof(rbdata)); 1080 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1081 1082 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1083 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1084 1085 return (scsipi_command(sd->sc_link, 1086 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1087 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1088 XS_CTL_DATA_OUT)); 1089 } 1090 1091 /* 1092 * Check Errors 1093 */ 1094 int 1095 sd_interpret_sense(xs) 1096 struct scsipi_xfer *xs; 1097 { 1098 struct scsipi_link *sc_link = xs->sc_link; 1099 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1100 struct sd_softc *sd = sc_link->device_softc; 1101 int retval = SCSIRET_CONTINUE; 1102 1103 /* 1104 * If the device is not open yet, let the generic code handle it. 1105 */ 1106 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 1107 return (retval); 1108 } 1109 1110 /* 1111 * If it isn't a extended or extended/deferred error, let 1112 * the generic code handle it. 1113 */ 1114 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1115 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1116 return (retval); 1117 } 1118 1119 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1120 sense->add_sense_code == 0x4) { 1121 if (sense->add_sense_code_qual == 0x01) { 1122 printf("%s: ..is spinning up...waiting\n", 1123 sd->sc_dev.dv_xname); 1124 /* 1125 * I really need a sdrestart function I can call here. 1126 */ 1127 delay(1000000 * 5); /* 5 seconds */ 1128 retval = SCSIRET_RETRY; 1129 } else if ((sense->add_sense_code_qual == 0x2) && 1130 (sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 1131 if (sd->sc_link->flags & SDEV_REMOVABLE) { 1132 printf( 1133 "%s: removable disk stopped - not restarting\n", 1134 sd->sc_dev.dv_xname); 1135 retval = EIO; 1136 } else { 1137 printf("%s: respinning up disk\n", 1138 sd->sc_dev.dv_xname); 1139 retval = scsipi_start(sd->sc_link, SSS_START, 1140 XS_CTL_URGENT | XS_CTL_NOSLEEP); 1141 if (retval != 0) { 1142 printf( 1143 "%s: respin of disk failed - %d\n", 1144 sd->sc_dev.dv_xname, retval); 1145 retval = EIO; 1146 } else { 1147 retval = SCSIRET_RETRY; 1148 } 1149 } 1150 } 1151 } 1152 return (retval); 1153 } 1154 1155 1156 int 1157 sdsize(dev) 1158 dev_t dev; 1159 { 1160 struct sd_softc *sd; 1161 int part, unit, omask; 1162 int size; 1163 1164 unit = SDUNIT(dev); 1165 if (unit >= sd_cd.cd_ndevs) 1166 return (-1); 1167 sd = sd_cd.cd_devs[unit]; 1168 if (sd == NULL) 1169 return (-1); 1170 1171 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1172 return (-1); 1173 1174 part = SDPART(dev); 1175 omask = sd->sc_dk.dk_openmask & (1 << part); 1176 1177 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1178 return (-1); 1179 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) 1180 size = -1; 1181 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1182 size = -1; 1183 else 1184 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1185 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1186 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1187 return (-1); 1188 return (size); 1189 } 1190 1191 #ifndef __BDEVSW_DUMP_OLD_TYPE 1192 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1193 static struct scsipi_xfer sx; 1194 static int sddoingadump; 1195 1196 /* 1197 * dump all of physical memory into the partition specified, starting 1198 * at offset 'dumplo' into the partition. 1199 */ 1200 int 1201 sddump(dev, blkno, va, size) 1202 dev_t dev; 1203 daddr_t blkno; 1204 caddr_t va; 1205 size_t size; 1206 { 1207 struct sd_softc *sd; /* disk unit to do the I/O */ 1208 struct disklabel *lp; /* disk's disklabel */ 1209 int unit, part; 1210 int sectorsize; /* size of a disk sector */ 1211 int nsects; /* number of sectors in partition */ 1212 int sectoff; /* sector offset of partition */ 1213 int totwrt; /* total number of sectors left to write */ 1214 int nwrt; /* current number of sectors to write */ 1215 struct scsipi_rw_big cmd; /* write command */ 1216 struct scsipi_xfer *xs; /* ... convenience */ 1217 int retval; 1218 1219 /* Check if recursive dump; if so, punt. */ 1220 if (sddoingadump) 1221 return (EFAULT); 1222 1223 /* Mark as active early. */ 1224 sddoingadump = 1; 1225 1226 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1227 part = SDPART(dev); 1228 1229 /* Check for acceptable drive number. */ 1230 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1231 return (ENXIO); 1232 1233 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1234 return (ENODEV); 1235 1236 /* Make sure it was initialized. */ 1237 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED) 1238 return (ENXIO); 1239 1240 /* Convert to disk sectors. Request must be a multiple of size. */ 1241 lp = sd->sc_dk.dk_label; 1242 sectorsize = lp->d_secsize; 1243 if ((size % sectorsize) != 0) 1244 return (EFAULT); 1245 totwrt = size / sectorsize; 1246 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1247 1248 nsects = lp->d_partitions[part].p_size; 1249 sectoff = lp->d_partitions[part].p_offset; 1250 1251 /* Check transfer bounds against partition size. */ 1252 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1253 return (EINVAL); 1254 1255 /* Offset block number to start of partition. */ 1256 blkno += sectoff; 1257 1258 xs = &sx; 1259 1260 while (totwrt > 0) { 1261 nwrt = totwrt; /* XXX */ 1262 #ifndef SD_DUMP_NOT_TRUSTED 1263 /* 1264 * Fill out the scsi command 1265 */ 1266 bzero(&cmd, sizeof(cmd)); 1267 cmd.opcode = WRITE_BIG; 1268 _lto4b(blkno, cmd.addr); 1269 _lto2b(nwrt, cmd.length); 1270 /* 1271 * Fill out the scsipi_xfer structure 1272 * Note: we cannot sleep as we may be an interrupt 1273 * don't use scsipi_command() as it may want to wait 1274 * for an xs. 1275 */ 1276 bzero(xs, sizeof(sx)); 1277 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1278 XS_CTL_DATA_OUT; 1279 xs->xs_status = 0; 1280 xs->sc_link = sd->sc_link; 1281 xs->retries = SDRETRIES; 1282 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1283 xs->cmd = (struct scsipi_generic *)&cmd; 1284 xs->cmdlen = sizeof(cmd); 1285 xs->resid = nwrt * sectorsize; 1286 xs->error = XS_NOERROR; 1287 xs->bp = 0; 1288 xs->data = va; 1289 xs->datalen = nwrt * sectorsize; 1290 1291 /* 1292 * Pass all this info to the scsi driver. 1293 */ 1294 retval = scsipi_command_direct(xs); 1295 if (retval != COMPLETE) 1296 return (ENXIO); 1297 #else /* SD_DUMP_NOT_TRUSTED */ 1298 /* Let's just talk about this first... */ 1299 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1300 delay(500 * 1000); /* half a second */ 1301 #endif /* SD_DUMP_NOT_TRUSTED */ 1302 1303 /* update block count */ 1304 totwrt -= nwrt; 1305 blkno += nwrt; 1306 va += sectorsize * nwrt; 1307 } 1308 sddoingadump = 0; 1309 return (0); 1310 } 1311 #else /* __BDEVSW_DUMP_NEW_TYPE */ 1312 int 1313 sddump(dev, blkno, va, size) 1314 dev_t dev; 1315 daddr_t blkno; 1316 caddr_t va; 1317 size_t size; 1318 { 1319 1320 /* Not implemented. */ 1321 return (ENXIO); 1322 } 1323 #endif /* __BDEVSW_DUMP_NEW_TYPE */ 1324