1 /* $NetBSD: sd.c,v 1.170 2001/03/09 16:07:39 explorer 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 the drive. 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 = BUFQ_FIRST(&sd->buf_queue)) != NULL) { 268 BUFQ_REMOVE(&sd->buf_queue, bp); 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 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 if (sd->sc_link->flags & SDEV_REMOVABLE) { 413 /* Lock the pack in. */ 414 error = scsipi_prevent(sc_link, PR_PREVENT, 415 XS_CTL_IGNORE_ILLEGAL_REQUEST 416 | XS_CTL_IGNORE_MEDIA_CHANGE); 417 if (error) 418 goto bad; 419 } 420 421 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 422 sc_link->flags |= SDEV_MEDIA_LOADED; 423 424 /* 425 * Load the physical device parameters. 426 * 427 * Note that if media is present but unformatted, 428 * we allow the open (so that it can be formatted!). 429 * The drive should refuse real I/O, if the media is 430 * unformatted. 431 */ 432 if ((*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 433 0) == SDGP_RESULT_OFFLINE) { 434 error = ENXIO; 435 goto bad2; 436 } 437 SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded ")); 438 439 /* Load the partition info if not already loaded. */ 440 sdgetdisklabel(sd); 441 SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded ")); 442 } 443 } 444 445 /* Check that the partition exists. */ 446 if (part != RAW_PART && 447 (part >= sd->sc_dk.dk_label->d_npartitions || 448 sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 449 error = ENXIO; 450 goto bad; 451 } 452 453 out: /* Insure only one open at a time. */ 454 switch (fmt) { 455 case S_IFCHR: 456 sd->sc_dk.dk_copenmask |= (1 << part); 457 break; 458 case S_IFBLK: 459 sd->sc_dk.dk_bopenmask |= (1 << part); 460 break; 461 } 462 sd->sc_dk.dk_openmask = 463 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 464 465 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 466 sdunlock(sd); 467 return (0); 468 469 bad2: 470 sc_link->flags &= ~SDEV_MEDIA_LOADED; 471 472 bad: 473 if (sd->sc_dk.dk_openmask == 0) { 474 scsipi_prevent(sc_link, PR_ALLOW, 475 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_MEDIA_CHANGE); 476 sc_link->flags &= ~SDEV_OPEN; 477 } 478 479 bad3: 480 sdunlock(sd); 481 bad4: 482 if (sd->sc_dk.dk_openmask == 0) 483 scsipi_adapter_delref(sc_link); 484 return (error); 485 } 486 487 /* 488 * close the device.. only called if we are the LAST occurence of an open 489 * device. Convenient now but usually a pain. 490 */ 491 int 492 sdclose(dev, flag, fmt, p) 493 dev_t dev; 494 int flag, fmt; 495 struct proc *p; 496 { 497 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 498 int part = SDPART(dev); 499 int error; 500 501 if ((error = sdlock(sd)) != 0) 502 return (error); 503 504 switch (fmt) { 505 case S_IFCHR: 506 sd->sc_dk.dk_copenmask &= ~(1 << part); 507 break; 508 case S_IFBLK: 509 sd->sc_dk.dk_bopenmask &= ~(1 << part); 510 break; 511 } 512 sd->sc_dk.dk_openmask = 513 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 514 515 if (sd->sc_dk.dk_openmask == 0) { 516 /* 517 * If the disk cache needs flushing, and the disk supports 518 * it, do it now. 519 */ 520 if ((sd->flags & SDF_DIRTY) != 0 && 521 sd->sc_ops->sdo_flush != NULL) { 522 if ((*sd->sc_ops->sdo_flush)(sd, 0)) { 523 printf("%s: cache synchronization failed\n", 524 sd->sc_dev.dv_xname); 525 sd->flags &= ~SDF_FLUSHING; 526 } else 527 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 528 } 529 530 scsipi_wait_drain(sd->sc_link); 531 532 if (sd->sc_link->flags & SDEV_REMOVABLE) { 533 scsipi_prevent(sd->sc_link, PR_ALLOW, 534 XS_CTL_IGNORE_ILLEGAL_REQUEST 535 | XS_CTL_IGNORE_NOT_READY); 536 } 537 538 sd->sc_link->flags &= ~SDEV_OPEN; 539 540 if (! (sd->sc_link->flags & SDEV_KEEP_LABEL)) 541 sd->sc_link->flags &= ~SDEV_MEDIA_LOADED; 542 543 scsipi_wait_drain(sd->sc_link); 544 545 scsipi_adapter_delref(sd->sc_link); 546 } 547 548 sdunlock(sd); 549 return (0); 550 } 551 552 /* 553 * Actually translate the requested transfer into one the physical driver 554 * can understand. The transfer is described by a buf and will include 555 * only one physical transfer. 556 */ 557 void 558 sdstrategy(bp) 559 struct buf *bp; 560 { 561 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 562 struct disklabel *lp; 563 daddr_t blkno; 564 int s; 565 boolean_t sector_aligned; 566 567 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy ")); 568 SC_DEBUG(sd->sc_link, SDEV_DB1, 569 ("%ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 570 /* 571 * If the device has been made invalid, error out 572 */ 573 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0 || 574 (sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) { 575 if (sd->sc_link->flags & SDEV_OPEN) 576 bp->b_error = EIO; 577 else 578 bp->b_error = ENODEV; 579 goto bad; 580 } 581 582 lp = sd->sc_dk.dk_label; 583 584 /* 585 * The transfer must be a whole number of blocks, offset must not be 586 * negative. 587 */ 588 if (lp->d_secsize == DEV_BSIZE) { 589 sector_aligned = (bp->b_bcount & (DEV_BSIZE - 1)) == 0; 590 } else { 591 sector_aligned = (bp->b_bcount % lp->d_secsize) == 0; 592 } 593 if (!sector_aligned || bp->b_blkno < 0) { 594 bp->b_error = EINVAL; 595 goto bad; 596 } 597 /* 598 * If it's a null transfer, return immediatly 599 */ 600 if (bp->b_bcount == 0) 601 goto done; 602 603 /* 604 * Do bounds checking, adjust transfer. if error, process. 605 * If end of partition, just return. 606 */ 607 if (SDPART(bp->b_dev) != RAW_PART && 608 bounds_check_with_label(bp, lp, 609 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 610 goto done; 611 612 /* 613 * Now convert the block number to absolute and put it in 614 * terms of the device's logical block size. 615 */ 616 if (lp->d_secsize == DEV_BSIZE) 617 blkno = bp->b_blkno; 618 else if (lp->d_secsize > DEV_BSIZE) 619 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 620 else 621 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 622 623 if (SDPART(bp->b_dev) != RAW_PART) 624 blkno += lp->d_partitions[SDPART(bp->b_dev)].p_offset; 625 626 bp->b_rawblkno = blkno; 627 628 s = splbio(); 629 630 /* 631 * Place it in the queue of disk activities for this disk 632 */ 633 disksort_blkno(&sd->buf_queue, bp); 634 635 /* 636 * Tell the device to get going on the transfer if it's 637 * not doing anything, otherwise just wait for completion 638 */ 639 sdstart(sd); 640 641 splx(s); 642 return; 643 644 bad: 645 bp->b_flags |= B_ERROR; 646 done: 647 /* 648 * Correctly set the buf to indicate a completed xfer 649 */ 650 bp->b_resid = bp->b_bcount; 651 biodone(bp); 652 } 653 654 /* 655 * sdstart looks to see if there is a buf waiting for the device 656 * and that the device is not already busy. If both are true, 657 * It dequeues the buf and creates a scsi command to perform the 658 * transfer in the buf. The transfer request will call scsipi_done 659 * on completion, which will in turn call this routine again 660 * so that the next queued transfer is performed. 661 * The bufs are queued by the strategy routine (sdstrategy) 662 * 663 * This routine is also called after other non-queued requests 664 * have been made of the scsi driver, to ensure that the queue 665 * continues to be drained. 666 * 667 * must be called at the correct (highish) spl level 668 * sdstart() is called at splbio from sdstrategy and scsipi_done 669 */ 670 void 671 sdstart(v) 672 void *v; 673 { 674 struct sd_softc *sd = v; 675 struct scsipi_link *sc_link = sd->sc_link; 676 struct disklabel *lp = sd->sc_dk.dk_label; 677 struct buf *bp = 0; 678 struct scsipi_rw_big cmd_big; 679 #if NSD_SCSIBUS > 0 680 struct scsi_rw cmd_small; 681 #endif 682 struct scsipi_generic *cmdp; 683 int nblks, cmdlen, error; 684 685 SC_DEBUG(sc_link, SDEV_DB2, ("sdstart ")); 686 /* 687 * Check if the device has room for another command 688 */ 689 while (sc_link->active < sc_link->openings) { 690 /* 691 * there is excess capacity, but a special waits 692 * It'll need the adapter as soon as we clear out of the 693 * way and let it run (user level wait). 694 */ 695 if (sc_link->flags & SDEV_WAITING) { 696 sc_link->flags &= ~SDEV_WAITING; 697 wakeup((caddr_t)sc_link); 698 return; 699 } 700 701 /* 702 * See if there is a buf with work for us to do.. 703 */ 704 if ((bp = BUFQ_FIRST(&sd->buf_queue)) == NULL) 705 return; 706 BUFQ_REMOVE(&sd->buf_queue, bp); 707 708 /* 709 * If the device has become invalid, abort all the 710 * reads and writes until all files have been closed and 711 * re-opened 712 */ 713 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 714 bp->b_error = EIO; 715 bp->b_flags |= B_ERROR; 716 bp->b_resid = bp->b_bcount; 717 biodone(bp); 718 continue; 719 } 720 721 /* 722 * We have a buf, now we should make a command. 723 */ 724 725 if (lp->d_secsize == DEV_BSIZE) 726 nblks = bp->b_bcount >> DEV_BSHIFT; 727 else 728 nblks = howmany(bp->b_bcount, lp->d_secsize); 729 730 #if NSD_SCSIBUS > 0 731 /* 732 * Fill out the scsi command. If the transfer will 733 * fit in a "small" cdb, use it. 734 */ 735 if (((bp->b_rawblkno & 0x1fffff) == bp->b_rawblkno) && 736 ((nblks & 0xff) == nblks) && sc_link->type == BUS_SCSI && 737 !(sc_link->quirks & SDEV_ONLYBIG)) { 738 /* 739 * We can fit in a small cdb. 740 */ 741 bzero(&cmd_small, sizeof(cmd_small)); 742 cmd_small.opcode = (bp->b_flags & B_READ) ? 743 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 744 _lto3b(bp->b_rawblkno, cmd_small.addr); 745 cmd_small.length = nblks & 0xff; 746 cmdlen = sizeof(cmd_small); 747 cmdp = (struct scsipi_generic *)&cmd_small; 748 } else 749 #endif 750 { 751 /* 752 * Need a large cdb. 753 */ 754 bzero(&cmd_big, sizeof(cmd_big)); 755 cmd_big.opcode = (bp->b_flags & B_READ) ? 756 READ_BIG : WRITE_BIG; 757 _lto4b(bp->b_rawblkno, cmd_big.addr); 758 _lto2b(nblks, cmd_big.length); 759 cmdlen = sizeof(cmd_big); 760 cmdp = (struct scsipi_generic *)&cmd_big; 761 } 762 763 /* Instrumentation. */ 764 disk_busy(&sd->sc_dk); 765 766 /* 767 * Mark the disk dirty so that the cache will be 768 * flushed on close. 769 */ 770 if ((bp->b_flags & B_READ) == 0) 771 sd->flags |= SDF_DIRTY; 772 773 /* 774 * Call the routine that chats with the adapter. 775 * Note: we cannot sleep as we may be an interrupt 776 * XXX Really need NOSLEEP? 777 */ 778 error = scsipi_command(sc_link, cmdp, cmdlen, 779 (u_char *)bp->b_data, bp->b_bcount, 780 SDRETRIES, 60000, bp, XS_CTL_NOSLEEP | XS_CTL_ASYNC | 781 ((bp->b_flags & B_READ) ? 782 XS_CTL_DATA_IN : XS_CTL_DATA_OUT)); 783 if (error) { 784 disk_unbusy(&sd->sc_dk, 0); 785 printf("%s: not queued, error %d\n", 786 sd->sc_dev.dv_xname, error); 787 } 788 } 789 } 790 791 void 792 sddone(xs) 793 struct scsipi_xfer *xs; 794 { 795 struct sd_softc *sd = xs->sc_link->device_softc; 796 797 if (sd->flags & SDF_FLUSHING) { 798 /* Flush completed, no longer dirty. */ 799 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 800 } 801 if (sd->flags & SDF_RESTART) { 802 sd->flags &= ~SDF_RESTART; 803 return; 804 } 805 806 if (xs->bp != NULL) { 807 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid); 808 #if NRND > 0 809 rnd_add_uint32(&sd->rnd_source, xs->bp->b_rawblkno); 810 #endif 811 } 812 } 813 814 void 815 sdminphys(bp) 816 struct buf *bp; 817 { 818 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 819 long max; 820 821 /* 822 * If the device is ancient, we want to make sure that 823 * the transfer fits into a 6-byte cdb. 824 * 825 * XXX Note that the SCSI-I spec says that 256-block transfers 826 * are allowed in a 6-byte read/write, and are specified 827 * by settng the "length" to 0. However, we're conservative 828 * here, allowing only 255-block transfers in case an 829 * ancient device gets confused by length == 0. A length of 0 830 * in a 10-byte read/write actually means 0 blocks. 831 */ 832 if ((sd->flags & SDF_ANCIENT) && 833 ((sd->sc_link->flags & (SDEV_REMOVABLE | SDEV_MEDIA_LOADED)) != 834 SDEV_REMOVABLE)) { 835 max = sd->sc_dk.dk_label->d_secsize * 0xff; 836 837 if (bp->b_bcount > max) 838 bp->b_bcount = max; 839 } 840 841 (*sd->sc_link->adapter->scsipi_minphys)(bp); 842 } 843 844 int 845 sdread(dev, uio, ioflag) 846 dev_t dev; 847 struct uio *uio; 848 int ioflag; 849 { 850 851 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 852 } 853 854 int 855 sdwrite(dev, uio, ioflag) 856 dev_t dev; 857 struct uio *uio; 858 int ioflag; 859 { 860 861 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 862 } 863 864 /* 865 * Perform special action on behalf of the user 866 * Knows about the internals of this device 867 */ 868 int 869 sdioctl(dev, cmd, addr, flag, p) 870 dev_t dev; 871 u_long cmd; 872 caddr_t addr; 873 int flag; 874 struct proc *p; 875 { 876 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 877 int part = SDPART(dev); 878 int error; 879 #ifdef __HAVE_OLD_DISKLABEL 880 struct disklabel newlabel; 881 #endif 882 883 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd)); 884 885 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 886 return (ENODEV); 887 888 /* 889 * If the device is not valid, some IOCTLs can still be 890 * handled on the raw partition. Check this here. 891 */ 892 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 893 switch (cmd) { 894 case DIOCKLABEL: 895 case DIOCWLABEL: 896 case DIOCLOCK: 897 case DIOCEJECT: 898 case ODIOCEJECT: 899 case SCIOCIDENTIFY: 900 case OSCIOCIDENTIFY: 901 case SCIOCCOMMAND: 902 case SCIOCDEBUG: 903 if (part == RAW_PART) 904 break; 905 /* FALLTHROUGH */ 906 default: 907 if ((sd->sc_link->flags & SDEV_OPEN) == 0) 908 return (ENODEV); 909 else 910 return (EIO); 911 } 912 } 913 914 switch (cmd) { 915 case DIOCGDINFO: 916 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 917 return (0); 918 919 #ifdef __HAVE_OLD_DISKLABEL 920 case ODIOCGDINFO: 921 newlabel = *(sd->sc_dk.dk_label); 922 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 923 return ENOTTY; 924 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 925 return (0); 926 #endif 927 928 case DIOCGPART: 929 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 930 ((struct partinfo *)addr)->part = 931 &sd->sc_dk.dk_label->d_partitions[part]; 932 return (0); 933 934 case DIOCWDINFO: 935 case DIOCSDINFO: 936 #ifdef __HAVE_OLD_DISKLABEL 937 case ODIOCWDINFO: 938 case ODIOCSDINFO: 939 #endif 940 { 941 struct disklabel *lp; 942 943 #ifdef __HAVE_OLD_DISKLABEL 944 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 945 memset(&newlabel, 0, sizeof newlabel); 946 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 947 lp = &newlabel; 948 } else 949 #endif 950 lp = (struct disklabel *)addr; 951 952 if ((flag & FWRITE) == 0) 953 return (EBADF); 954 955 if ((error = sdlock(sd)) != 0) 956 return (error); 957 sd->flags |= SDF_LABELLING; 958 959 error = setdisklabel(sd->sc_dk.dk_label, 960 lp, /*sd->sc_dk.dk_openmask : */0, 961 sd->sc_dk.dk_cpulabel); 962 if (error == 0) { 963 if (cmd == DIOCWDINFO 964 #ifdef __HAVE_OLD_DISKLABEL 965 || cmd == ODIOCWDINFO 966 #endif 967 ) 968 error = writedisklabel(SDLABELDEV(dev), 969 sdstrategy, sd->sc_dk.dk_label, 970 sd->sc_dk.dk_cpulabel); 971 } 972 973 sd->flags &= ~SDF_LABELLING; 974 sdunlock(sd); 975 return (error); 976 } 977 978 case DIOCKLABEL: 979 if (*(int *)addr) 980 sd->sc_link->flags |= SDEV_KEEP_LABEL; 981 else 982 sd->sc_link->flags &= ~SDEV_KEEP_LABEL; 983 return (0); 984 985 case DIOCWLABEL: 986 if ((flag & FWRITE) == 0) 987 return (EBADF); 988 if (*(int *)addr) 989 sd->flags |= SDF_WLABEL; 990 else 991 sd->flags &= ~SDF_WLABEL; 992 return (0); 993 994 case DIOCLOCK: 995 return (scsipi_prevent(sd->sc_link, 996 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 997 998 case DIOCEJECT: 999 if ((sd->sc_link->flags & SDEV_REMOVABLE) == 0) 1000 return (ENOTTY); 1001 if (*(int *)addr == 0) { 1002 /* 1003 * Don't force eject: check that we are the only 1004 * partition open. If so, unlock it. 1005 */ 1006 if ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 1007 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 1008 sd->sc_dk.dk_openmask) { 1009 error = scsipi_prevent(sd->sc_link, PR_ALLOW, 1010 XS_CTL_IGNORE_NOT_READY); 1011 if (error) 1012 return (error); 1013 } else { 1014 return (EBUSY); 1015 } 1016 } 1017 /* FALLTHROUGH */ 1018 case ODIOCEJECT: 1019 return ((sd->sc_link->flags & SDEV_REMOVABLE) == 0 ? ENOTTY : 1020 scsipi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0)); 1021 1022 case DIOCGDEFLABEL: 1023 sdgetdefaultlabel(sd, (struct disklabel *)addr); 1024 return (0); 1025 1026 #ifdef __HAVE_OLD_DISKLABEL 1027 case ODIOCGDEFLABEL: 1028 sdgetdefaultlabel(sd, &newlabel); 1029 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 1030 return ENOTTY; 1031 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 1032 return (0); 1033 #endif 1034 1035 default: 1036 if (part != RAW_PART) 1037 return (ENOTTY); 1038 return (scsipi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p)); 1039 } 1040 1041 #ifdef DIAGNOSTIC 1042 panic("sdioctl: impossible"); 1043 #endif 1044 } 1045 1046 void 1047 sdgetdefaultlabel(sd, lp) 1048 struct sd_softc *sd; 1049 struct disklabel *lp; 1050 { 1051 1052 bzero(lp, sizeof(struct disklabel)); 1053 1054 lp->d_secsize = sd->params.blksize; 1055 lp->d_ntracks = sd->params.heads; 1056 lp->d_nsectors = sd->params.sectors; 1057 lp->d_ncylinders = sd->params.cyls; 1058 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 1059 1060 switch (sd->sc_link->type) { 1061 #if NSD_SCSIBUS > 0 1062 case BUS_SCSI: 1063 lp->d_type = DTYPE_SCSI; 1064 break; 1065 #endif 1066 #if NSD_ATAPIBUS > 0 1067 case BUS_ATAPI: 1068 lp->d_type = DTYPE_ATAPI; 1069 break; 1070 #endif 1071 } 1072 strncpy(lp->d_typename, sd->name, 16); 1073 strncpy(lp->d_packname, "fictitious", 16); 1074 lp->d_secperunit = sd->params.disksize; 1075 lp->d_rpm = sd->params.rot_rate; 1076 lp->d_interleave = 1; 1077 lp->d_flags = 0; 1078 1079 lp->d_partitions[RAW_PART].p_offset = 0; 1080 lp->d_partitions[RAW_PART].p_size = 1081 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1082 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1083 lp->d_npartitions = RAW_PART + 1; 1084 1085 lp->d_magic = DISKMAGIC; 1086 lp->d_magic2 = DISKMAGIC; 1087 lp->d_checksum = dkcksum(lp); 1088 } 1089 1090 1091 /* 1092 * Load the label information on the named device 1093 */ 1094 void 1095 sdgetdisklabel(sd) 1096 struct sd_softc *sd; 1097 { 1098 struct disklabel *lp = sd->sc_dk.dk_label; 1099 char *errstring; 1100 1101 bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel)); 1102 1103 sdgetdefaultlabel(sd, lp); 1104 1105 if (lp->d_secpercyl == 0) { 1106 lp->d_secpercyl = 100; 1107 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1108 } 1109 1110 /* 1111 * Call the generic disklabel extraction routine 1112 */ 1113 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1114 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1115 if (errstring) { 1116 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1117 return; 1118 } 1119 } 1120 1121 void 1122 sd_shutdown(arg) 1123 void *arg; 1124 { 1125 struct sd_softc *sd = arg; 1126 1127 /* 1128 * If the disk cache needs to be flushed, and the disk supports 1129 * it, flush it. We're cold at this point, so we poll for 1130 * completion. 1131 */ 1132 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1133 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1134 printf("%s: cache synchronization failed\n", 1135 sd->sc_dev.dv_xname); 1136 sd->flags &= ~SDF_FLUSHING; 1137 } else 1138 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1139 } 1140 } 1141 1142 /* 1143 * Tell the device to map out a defective block 1144 */ 1145 int 1146 sd_reassign_blocks(sd, blkno) 1147 struct sd_softc *sd; 1148 u_long blkno; 1149 { 1150 struct scsi_reassign_blocks scsipi_cmd; 1151 struct scsi_reassign_blocks_data rbdata; 1152 1153 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 1154 bzero(&rbdata, sizeof(rbdata)); 1155 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1156 1157 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1158 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1159 1160 return (scsipi_command(sd->sc_link, 1161 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1162 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1163 XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); 1164 } 1165 1166 /* 1167 * Check Errors 1168 */ 1169 int 1170 sd_interpret_sense(xs) 1171 struct scsipi_xfer *xs; 1172 { 1173 struct scsipi_link *sc_link = xs->sc_link; 1174 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1175 struct sd_softc *sd = sc_link->device_softc; 1176 int retval = SCSIRET_CONTINUE; 1177 1178 /* 1179 * If the device is not open yet, let the generic code handle it. 1180 */ 1181 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 1182 return (retval); 1183 } 1184 1185 /* 1186 * If it isn't a extended or extended/deferred error, let 1187 * the generic code handle it. 1188 */ 1189 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1190 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1191 return (retval); 1192 } 1193 1194 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1195 sense->add_sense_code == 0x4) { 1196 if (sense->add_sense_code_qual == 0x01) { 1197 printf("%s: ..is spinning up...waiting\n", 1198 sd->sc_dev.dv_xname); 1199 /* 1200 * I really need a sdrestart function I can call here. 1201 */ 1202 delay(1000000 * 5); /* 5 seconds */ 1203 retval = SCSIRET_RETRY; 1204 } else if ((sense->add_sense_code_qual == 0x2) && 1205 (sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 1206 if (sd->sc_link->flags & SDEV_REMOVABLE) { 1207 printf( 1208 "%s: removable disk stopped - not restarting\n", 1209 sd->sc_dev.dv_xname); 1210 retval = EIO; 1211 } else { 1212 if (sd->flags & SDF_RESTART) 1213 return SCSIRET_RETRY; 1214 sd->flags |= SDF_RESTART; 1215 printf("%s: respinning up disk\n", 1216 sd->sc_dev.dv_xname); 1217 retval = scsipi_start(sd->sc_link, SSS_START, 1218 XS_CTL_URGENT | XS_CTL_NOSLEEP | 1219 ((xs->xs_control & XS_CTL_ASYNC) ? 1220 XS_CTL_ASYNC : 0)); 1221 if ((xs->xs_control & XS_CTL_ASYNC) == 0) 1222 sd->flags &= ~SDF_RESTART; 1223 if (retval != 0) { 1224 printf( 1225 "%s: respin of disk failed - %d\n", 1226 sd->sc_dev.dv_xname, retval); 1227 retval = EIO; 1228 } else { 1229 retval = SCSIRET_RETRY; 1230 } 1231 } 1232 } 1233 } 1234 return (retval); 1235 } 1236 1237 1238 int 1239 sdsize(dev) 1240 dev_t dev; 1241 { 1242 struct sd_softc *sd; 1243 int part, unit, omask; 1244 int size; 1245 1246 unit = SDUNIT(dev); 1247 if (unit >= sd_cd.cd_ndevs) 1248 return (-1); 1249 sd = sd_cd.cd_devs[unit]; 1250 if (sd == NULL) 1251 return (-1); 1252 1253 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1254 return (-1); 1255 1256 part = SDPART(dev); 1257 omask = sd->sc_dk.dk_openmask & (1 << part); 1258 1259 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1260 return (-1); 1261 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) 1262 size = -1; 1263 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1264 size = -1; 1265 else 1266 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1267 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1268 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1269 return (-1); 1270 return (size); 1271 } 1272 1273 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1274 static struct scsipi_xfer sx; 1275 static int sddoingadump; 1276 1277 /* 1278 * dump all of physical memory into the partition specified, starting 1279 * at offset 'dumplo' into the partition. 1280 */ 1281 int 1282 sddump(dev, blkno, va, size) 1283 dev_t dev; 1284 daddr_t blkno; 1285 caddr_t va; 1286 size_t size; 1287 { 1288 struct sd_softc *sd; /* disk unit to do the I/O */ 1289 struct disklabel *lp; /* disk's disklabel */ 1290 int unit, part; 1291 int sectorsize; /* size of a disk sector */ 1292 int nsects; /* number of sectors in partition */ 1293 int sectoff; /* sector offset of partition */ 1294 int totwrt; /* total number of sectors left to write */ 1295 int nwrt; /* current number of sectors to write */ 1296 struct scsipi_rw_big cmd; /* write command */ 1297 struct scsipi_xfer *xs; /* ... convenience */ 1298 int retval; 1299 1300 /* Check if recursive dump; if so, punt. */ 1301 if (sddoingadump) 1302 return (EFAULT); 1303 1304 /* Mark as active early. */ 1305 sddoingadump = 1; 1306 1307 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1308 part = SDPART(dev); 1309 1310 /* Check for acceptable drive number. */ 1311 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1312 return (ENXIO); 1313 1314 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1315 return (ENODEV); 1316 1317 /* Make sure it was initialized. */ 1318 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED) 1319 return (ENXIO); 1320 1321 /* Convert to disk sectors. Request must be a multiple of size. */ 1322 lp = sd->sc_dk.dk_label; 1323 sectorsize = lp->d_secsize; 1324 if ((size % sectorsize) != 0) 1325 return (EFAULT); 1326 totwrt = size / sectorsize; 1327 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1328 1329 nsects = lp->d_partitions[part].p_size; 1330 sectoff = lp->d_partitions[part].p_offset; 1331 1332 /* Check transfer bounds against partition size. */ 1333 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1334 return (EINVAL); 1335 1336 /* Offset block number to start of partition. */ 1337 blkno += sectoff; 1338 1339 xs = &sx; 1340 1341 while (totwrt > 0) { 1342 nwrt = totwrt; /* XXX */ 1343 #ifndef SD_DUMP_NOT_TRUSTED 1344 /* 1345 * Fill out the scsi command 1346 */ 1347 bzero(&cmd, sizeof(cmd)); 1348 cmd.opcode = WRITE_BIG; 1349 _lto4b(blkno, cmd.addr); 1350 _lto2b(nwrt, cmd.length); 1351 /* 1352 * Fill out the scsipi_xfer structure 1353 * Note: we cannot sleep as we may be an interrupt 1354 * don't use scsipi_command() as it may want to wait 1355 * for an xs. 1356 */ 1357 bzero(xs, sizeof(sx)); 1358 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1359 XS_CTL_DATA_OUT; 1360 xs->xs_status = 0; 1361 xs->sc_link = sd->sc_link; 1362 xs->retries = SDRETRIES; 1363 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1364 xs->cmd = (struct scsipi_generic *)&cmd; 1365 xs->cmdlen = sizeof(cmd); 1366 xs->resid = nwrt * sectorsize; 1367 xs->error = XS_NOERROR; 1368 xs->bp = 0; 1369 xs->data = va; 1370 xs->datalen = nwrt * sectorsize; 1371 1372 /* 1373 * Pass all this info to the scsi driver. 1374 */ 1375 retval = scsipi_command_direct(xs); 1376 if (retval != COMPLETE) 1377 return (ENXIO); 1378 #else /* SD_DUMP_NOT_TRUSTED */ 1379 /* Let's just talk about this first... */ 1380 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1381 delay(500 * 1000); /* half a second */ 1382 #endif /* SD_DUMP_NOT_TRUSTED */ 1383 1384 /* update block count */ 1385 totwrt -= nwrt; 1386 blkno += nwrt; 1387 va += sectorsize * nwrt; 1388 } 1389 sddoingadump = 0; 1390 return (0); 1391 } 1392