1 /* $NetBSD: sd.c,v 1.151 1999/10/17 09:44:48 ragge 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 scsipi_wait_drain(sd->sc_link); 534 535 scsipi_adapter_delref(sd->sc_link); 536 } 537 538 sdunlock(sd); 539 return (0); 540 } 541 542 /* 543 * Actually translate the requested transfer into one the physical driver 544 * can understand. The transfer is described by a buf and will include 545 * only one physical transfer. 546 */ 547 void 548 sdstrategy(bp) 549 struct buf *bp; 550 { 551 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 552 int s; 553 554 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy ")); 555 SC_DEBUG(sd->sc_link, SDEV_DB1, 556 ("%ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 557 /* 558 * If the device has been made invalid, error out 559 */ 560 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0 || 561 (sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) { 562 if (sd->sc_link->flags & SDEV_OPEN) 563 bp->b_error = EIO; 564 else 565 bp->b_error = ENODEV; 566 goto bad; 567 } 568 /* 569 * The transfer must be a whole number of blocks, offset must not be 570 * negative. 571 */ 572 if ((bp->b_bcount % sd->sc_dk.dk_label->d_secsize) != 0 || 573 bp->b_blkno < 0) { 574 bp->b_error = EINVAL; 575 goto bad; 576 } 577 /* 578 * If it's a null transfer, return immediatly 579 */ 580 if (bp->b_bcount == 0) 581 goto done; 582 583 /* 584 * Do bounds checking, adjust transfer. if error, process. 585 * If end of partition, just return. 586 */ 587 if (SDPART(bp->b_dev) != RAW_PART && 588 bounds_check_with_label(bp, sd->sc_dk.dk_label, 589 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 590 goto done; 591 592 s = splbio(); 593 594 /* 595 * Place it in the queue of disk activities for this disk 596 */ 597 disksort(&sd->buf_queue, bp); 598 599 /* 600 * Tell the device to get going on the transfer if it's 601 * not doing anything, otherwise just wait for completion 602 */ 603 sdstart(sd); 604 605 splx(s); 606 return; 607 608 bad: 609 bp->b_flags |= B_ERROR; 610 done: 611 /* 612 * Correctly set the buf to indicate a completed xfer 613 */ 614 bp->b_resid = bp->b_bcount; 615 biodone(bp); 616 } 617 618 /* 619 * sdstart looks to see if there is a buf waiting for the device 620 * and that the device is not already busy. If both are true, 621 * It dequeues the buf and creates a scsi command to perform the 622 * transfer in the buf. The transfer request will call scsipi_done 623 * on completion, which will in turn call this routine again 624 * so that the next queued transfer is performed. 625 * The bufs are queued by the strategy routine (sdstrategy) 626 * 627 * This routine is also called after other non-queued requests 628 * have been made of the scsi driver, to ensure that the queue 629 * continues to be drained. 630 * 631 * must be called at the correct (highish) spl level 632 * sdstart() is called at splbio from sdstrategy and scsipi_done 633 */ 634 void 635 sdstart(v) 636 register void *v; 637 { 638 register struct sd_softc *sd = v; 639 register struct scsipi_link *sc_link = sd->sc_link; 640 struct disklabel *lp = sd->sc_dk.dk_label; 641 struct buf *bp = 0; 642 struct buf *dp; 643 struct scsipi_rw_big cmd_big; 644 #if NSD_SCSIBUS > 0 645 struct scsi_rw cmd_small; 646 #endif 647 struct scsipi_generic *cmdp; 648 int blkno, nblks, cmdlen, error; 649 struct partition *p; 650 651 SC_DEBUG(sc_link, SDEV_DB2, ("sdstart ")); 652 /* 653 * Check if the device has room for another command 654 */ 655 while (sc_link->active < sc_link->openings) { 656 /* 657 * there is excess capacity, but a special waits 658 * It'll need the adapter as soon as we clear out of the 659 * way and let it run (user level wait). 660 */ 661 if (sc_link->flags & SDEV_WAITING) { 662 sc_link->flags &= ~SDEV_WAITING; 663 wakeup((caddr_t)sc_link); 664 return; 665 } 666 667 /* 668 * See if there is a buf with work for us to do.. 669 */ 670 dp = &sd->buf_queue; 671 if ((bp = dp->b_actf) == NULL) /* yes, an assign */ 672 return; 673 dp->b_actf = bp->b_actf; 674 675 /* 676 * If the device has become invalid, abort all the 677 * reads and writes until all files have been closed and 678 * re-opened 679 */ 680 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 681 bp->b_error = EIO; 682 bp->b_flags |= B_ERROR; 683 bp->b_resid = bp->b_bcount; 684 biodone(bp); 685 continue; 686 } 687 688 /* 689 * We have a buf, now we should make a command 690 * 691 * First, translate the block to absolute and put it in terms 692 * of the logical blocksize of the device. 693 */ 694 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 695 if (SDPART(bp->b_dev) != RAW_PART) { 696 p = &lp->d_partitions[SDPART(bp->b_dev)]; 697 blkno += p->p_offset; 698 } 699 nblks = howmany(bp->b_bcount, lp->d_secsize); 700 701 #if NSD_SCSIBUS > 0 702 /* 703 * Fill out the scsi command. If the transfer will 704 * fit in a "small" cdb, use it. 705 */ 706 if (((blkno & 0x1fffff) == blkno) && 707 ((nblks & 0xff) == nblks) && sc_link->type == BUS_SCSI) { 708 /* 709 * We can fit in a small cdb. 710 */ 711 bzero(&cmd_small, sizeof(cmd_small)); 712 cmd_small.opcode = (bp->b_flags & B_READ) ? 713 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 714 _lto3b(blkno, cmd_small.addr); 715 cmd_small.length = nblks & 0xff; 716 cmdlen = sizeof(cmd_small); 717 cmdp = (struct scsipi_generic *)&cmd_small; 718 } else 719 #endif 720 { 721 /* 722 * Need a large cdb. 723 */ 724 bzero(&cmd_big, sizeof(cmd_big)); 725 cmd_big.opcode = (bp->b_flags & B_READ) ? 726 READ_BIG : WRITE_BIG; 727 _lto4b(blkno, cmd_big.addr); 728 _lto2b(nblks, cmd_big.length); 729 cmdlen = sizeof(cmd_big); 730 cmdp = (struct scsipi_generic *)&cmd_big; 731 } 732 733 /* Instrumentation. */ 734 disk_busy(&sd->sc_dk); 735 736 /* 737 * Mark the disk dirty so that the cache will be 738 * flushed on close. 739 */ 740 if ((bp->b_flags & B_READ) == 0) 741 sd->flags |= SDF_DIRTY; 742 743 /* 744 * Call the routine that chats with the adapter. 745 * Note: we cannot sleep as we may be an interrupt 746 * XXX Really need NOSLEEP? 747 */ 748 error = scsipi_command(sc_link, cmdp, cmdlen, 749 (u_char *)bp->b_data, bp->b_bcount, 750 SDRETRIES, 60000, bp, XS_CTL_NOSLEEP | XS_CTL_ASYNC | 751 ((bp->b_flags & B_READ) ? 752 XS_CTL_DATA_IN : XS_CTL_DATA_OUT)); 753 if (error) { 754 disk_unbusy(&sd->sc_dk, 0); 755 printf("%s: not queued, error %d\n", 756 sd->sc_dev.dv_xname, error); 757 } 758 } 759 } 760 761 void 762 sddone(xs) 763 struct scsipi_xfer *xs; 764 { 765 struct sd_softc *sd = xs->sc_link->device_softc; 766 767 if (sd->flags & SDF_FLUSHING) { 768 /* Flush completed, no longer dirty. */ 769 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 770 } 771 772 if (xs->bp != NULL) { 773 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid); 774 #if NRND > 0 775 rnd_add_uint32(&sd->rnd_source, xs->bp->b_blkno); 776 #endif 777 } 778 } 779 780 void 781 sdminphys(bp) 782 struct buf *bp; 783 { 784 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 785 long max; 786 787 /* 788 * If the device is ancient, we want to make sure that 789 * the transfer fits into a 6-byte cdb. 790 * 791 * XXX Note that the SCSI-I spec says that 256-block transfers 792 * are allowed in a 6-byte read/write, and are specified 793 * by settng the "length" to 0. However, we're conservative 794 * here, allowing only 255-block transfers in case an 795 * ancient device gets confused by length == 0. A length of 0 796 * in a 10-byte read/write actually means 0 blocks. 797 */ 798 if (sd->flags & SDF_ANCIENT) { 799 max = sd->sc_dk.dk_label->d_secsize * 0xff; 800 801 if (bp->b_bcount > max) 802 bp->b_bcount = max; 803 } 804 805 (*sd->sc_link->adapter->scsipi_minphys)(bp); 806 } 807 808 int 809 sdread(dev, uio, ioflag) 810 dev_t dev; 811 struct uio *uio; 812 int ioflag; 813 { 814 815 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 816 } 817 818 int 819 sdwrite(dev, uio, ioflag) 820 dev_t dev; 821 struct uio *uio; 822 int ioflag; 823 { 824 825 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 826 } 827 828 /* 829 * Perform special action on behalf of the user 830 * Knows about the internals of this device 831 */ 832 int 833 sdioctl(dev, cmd, addr, flag, p) 834 dev_t dev; 835 u_long cmd; 836 caddr_t addr; 837 int flag; 838 struct proc *p; 839 { 840 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 841 int part = SDPART(dev); 842 int error; 843 844 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd)); 845 846 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 847 return (ENODEV); 848 849 /* 850 * If the device is not valid, some IOCTLs can still be 851 * handled on the raw partition. Check this here. 852 */ 853 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 854 switch (cmd) { 855 case DIOCWLABEL: 856 case DIOCLOCK: 857 case DIOCEJECT: 858 case ODIOCEJECT: 859 case SCIOCIDENTIFY: 860 case OSCIOCIDENTIFY: 861 case SCIOCCOMMAND: 862 case SCIOCDEBUG: 863 if (part == RAW_PART) 864 break; 865 /* FALLTHROUGH */ 866 default: 867 if ((sd->sc_link->flags & SDEV_OPEN) == 0) 868 return (ENODEV); 869 else 870 return (EIO); 871 } 872 } 873 874 switch (cmd) { 875 case DIOCGDINFO: 876 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 877 return (0); 878 879 case DIOCGPART: 880 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 881 ((struct partinfo *)addr)->part = 882 &sd->sc_dk.dk_label->d_partitions[part]; 883 return (0); 884 885 case DIOCWDINFO: 886 case DIOCSDINFO: 887 if ((flag & FWRITE) == 0) 888 return (EBADF); 889 890 if ((error = sdlock(sd)) != 0) 891 return (error); 892 sd->flags |= SDF_LABELLING; 893 894 error = setdisklabel(sd->sc_dk.dk_label, 895 (struct disklabel *)addr, /*sd->sc_dk.dk_openmask : */0, 896 sd->sc_dk.dk_cpulabel); 897 if (error == 0) { 898 if (cmd == DIOCWDINFO) 899 error = writedisklabel(SDLABELDEV(dev), 900 sdstrategy, sd->sc_dk.dk_label, 901 sd->sc_dk.dk_cpulabel); 902 } 903 904 sd->flags &= ~SDF_LABELLING; 905 sdunlock(sd); 906 return (error); 907 908 case DIOCWLABEL: 909 if ((flag & FWRITE) == 0) 910 return (EBADF); 911 if (*(int *)addr) 912 sd->flags |= SDF_WLABEL; 913 else 914 sd->flags &= ~SDF_WLABEL; 915 return (0); 916 917 case DIOCLOCK: 918 return (scsipi_prevent(sd->sc_link, 919 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 920 921 case DIOCEJECT: 922 if ((sd->sc_link->flags & SDEV_REMOVABLE) == 0) 923 return (ENOTTY); 924 if (*(int *)addr == 0) { 925 /* 926 * Don't force eject: check that we are the only 927 * partition open. If so, unlock it. 928 */ 929 if ((sd->sc_dk.dk_openmask & ~(1 << part)) == 0 && 930 sd->sc_dk.dk_bopenmask + sd->sc_dk.dk_copenmask == 931 sd->sc_dk.dk_openmask) { 932 error = scsipi_prevent(sd->sc_link, PR_ALLOW, 933 XS_CTL_IGNORE_NOT_READY); 934 if (error) 935 return (error); 936 } else { 937 return (EBUSY); 938 } 939 } 940 /* FALLTHROUGH */ 941 case ODIOCEJECT: 942 return ((sd->sc_link->flags & SDEV_REMOVABLE) == 0 ? ENOTTY : 943 scsipi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0)); 944 945 case DIOCGDEFLABEL: 946 sdgetdefaultlabel(sd, (struct disklabel *)addr); 947 return (0); 948 949 default: 950 if (part != RAW_PART) 951 return (ENOTTY); 952 return (scsipi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p)); 953 } 954 955 #ifdef DIAGNOSTIC 956 panic("sdioctl: impossible"); 957 #endif 958 } 959 960 void 961 sdgetdefaultlabel(sd, lp) 962 struct sd_softc *sd; 963 struct disklabel *lp; 964 { 965 966 bzero(lp, sizeof(struct disklabel)); 967 968 lp->d_secsize = sd->params.blksize; 969 lp->d_ntracks = sd->params.heads; 970 lp->d_nsectors = sd->params.sectors; 971 lp->d_ncylinders = sd->params.cyls; 972 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 973 974 switch (sd->sc_link->type) { 975 #if NSD_SCSIBUS > 0 976 case BUS_SCSI: 977 lp->d_type = DTYPE_SCSI; 978 break; 979 #endif 980 #if NSD_ATAPIBUS > 0 981 case BUS_ATAPI: 982 lp->d_type = DTYPE_ATAPI; 983 break; 984 #endif 985 } 986 strncpy(lp->d_typename, sd->name, 16); 987 strncpy(lp->d_packname, "fictitious", 16); 988 lp->d_secperunit = sd->params.disksize; 989 lp->d_rpm = sd->params.rot_rate; 990 lp->d_interleave = 1; 991 lp->d_flags = 0; 992 993 lp->d_partitions[RAW_PART].p_offset = 0; 994 lp->d_partitions[RAW_PART].p_size = 995 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 996 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 997 lp->d_npartitions = RAW_PART + 1; 998 999 lp->d_magic = DISKMAGIC; 1000 lp->d_magic2 = DISKMAGIC; 1001 lp->d_checksum = dkcksum(lp); 1002 } 1003 1004 1005 /* 1006 * Load the label information on the named device 1007 */ 1008 void 1009 sdgetdisklabel(sd) 1010 struct sd_softc *sd; 1011 { 1012 struct disklabel *lp = sd->sc_dk.dk_label; 1013 char *errstring; 1014 1015 bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel)); 1016 1017 sdgetdefaultlabel(sd, lp); 1018 1019 if (lp->d_secpercyl == 0) { 1020 lp->d_secpercyl = 100; 1021 /* as long as it's not 0 - readdisklabel divides by it (?) */ 1022 } 1023 1024 /* 1025 * Call the generic disklabel extraction routine 1026 */ 1027 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 1028 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 1029 if (errstring) { 1030 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 1031 return; 1032 } 1033 } 1034 1035 void 1036 sd_shutdown(arg) 1037 void *arg; 1038 { 1039 struct sd_softc *sd = arg; 1040 1041 /* 1042 * If the disk cache needs to be flushed, and the disk supports 1043 * it, flush it. We're cold at this point, so we poll for 1044 * completion. 1045 */ 1046 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) { 1047 if ((*sd->sc_ops->sdo_flush)(sd, XS_CTL_NOSLEEP|XS_CTL_POLL)) { 1048 printf("%s: cache synchronization failed\n", 1049 sd->sc_dev.dv_xname); 1050 sd->flags &= ~SDF_FLUSHING; 1051 } else 1052 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 1053 } 1054 } 1055 1056 /* 1057 * Tell the device to map out a defective block 1058 */ 1059 int 1060 sd_reassign_blocks(sd, blkno) 1061 struct sd_softc *sd; 1062 u_long blkno; 1063 { 1064 struct scsi_reassign_blocks scsipi_cmd; 1065 struct scsi_reassign_blocks_data rbdata; 1066 1067 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 1068 bzero(&rbdata, sizeof(rbdata)); 1069 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 1070 1071 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 1072 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 1073 1074 return (scsipi_command(sd->sc_link, 1075 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 1076 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 1077 XS_CTL_DATA_OUT)); 1078 } 1079 1080 /* 1081 * Check Errors 1082 */ 1083 int 1084 sd_interpret_sense(xs) 1085 struct scsipi_xfer *xs; 1086 { 1087 struct scsipi_link *sc_link = xs->sc_link; 1088 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1089 struct sd_softc *sd = sc_link->device_softc; 1090 int retval = SCSIRET_CONTINUE; 1091 1092 /* 1093 * If the device is not open yet, let the generic code handle it. 1094 */ 1095 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 1096 return (retval); 1097 } 1098 1099 /* 1100 * If it isn't a extended or extended/deferred error, let 1101 * the generic code handle it. 1102 */ 1103 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1104 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1105 return (retval); 1106 } 1107 1108 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 1109 sense->add_sense_code == 0x4) { 1110 if (sense->add_sense_code_qual == 0x01) { 1111 printf("%s: ..is spinning up...waiting\n", 1112 sd->sc_dev.dv_xname); 1113 /* 1114 * I really need a sdrestart function I can call here. 1115 */ 1116 delay(1000000 * 5); /* 5 seconds */ 1117 retval = SCSIRET_RETRY; 1118 } else if ((sense->add_sense_code_qual == 0x2) && 1119 (sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 1120 if (sd->sc_link->flags & SDEV_REMOVABLE) { 1121 printf( 1122 "%s: removable disk stopped - not restarting\n", 1123 sd->sc_dev.dv_xname); 1124 retval = EIO; 1125 } else { 1126 printf("%s: respinning up disk\n", 1127 sd->sc_dev.dv_xname); 1128 retval = scsipi_start(sd->sc_link, SSS_START, 1129 XS_CTL_URGENT | XS_CTL_NOSLEEP); 1130 if (retval != 0) { 1131 printf( 1132 "%s: respin of disk failed - %d\n", 1133 sd->sc_dev.dv_xname, retval); 1134 retval = EIO; 1135 } else { 1136 retval = SCSIRET_RETRY; 1137 } 1138 } 1139 } 1140 } 1141 return (retval); 1142 } 1143 1144 1145 int 1146 sdsize(dev) 1147 dev_t dev; 1148 { 1149 struct sd_softc *sd; 1150 int part, unit, omask; 1151 int size; 1152 1153 unit = SDUNIT(dev); 1154 if (unit >= sd_cd.cd_ndevs) 1155 return (-1); 1156 sd = sd_cd.cd_devs[unit]; 1157 if (sd == NULL) 1158 return (-1); 1159 1160 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1161 return (-1); 1162 1163 part = SDPART(dev); 1164 omask = sd->sc_dk.dk_openmask & (1 << part); 1165 1166 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1167 return (-1); 1168 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) 1169 size = -1; 1170 else if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1171 size = -1; 1172 else 1173 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1174 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1175 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1176 return (-1); 1177 return (size); 1178 } 1179 1180 #ifndef __BDEVSW_DUMP_OLD_TYPE 1181 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1182 static struct scsipi_xfer sx; 1183 static int sddoingadump; 1184 1185 /* 1186 * dump all of physical memory into the partition specified, starting 1187 * at offset 'dumplo' into the partition. 1188 */ 1189 int 1190 sddump(dev, blkno, va, size) 1191 dev_t dev; 1192 daddr_t blkno; 1193 caddr_t va; 1194 size_t size; 1195 { 1196 struct sd_softc *sd; /* disk unit to do the I/O */ 1197 struct disklabel *lp; /* disk's disklabel */ 1198 int unit, part; 1199 int sectorsize; /* size of a disk sector */ 1200 int nsects; /* number of sectors in partition */ 1201 int sectoff; /* sector offset of partition */ 1202 int totwrt; /* total number of sectors left to write */ 1203 int nwrt; /* current number of sectors to write */ 1204 struct scsipi_rw_big cmd; /* write command */ 1205 struct scsipi_xfer *xs; /* ... convenience */ 1206 int retval; 1207 1208 if ((sd->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1209 return (ENODEV); 1210 1211 /* Check if recursive dump; if so, punt. */ 1212 if (sddoingadump) 1213 return (EFAULT); 1214 1215 /* Mark as active early. */ 1216 sddoingadump = 1; 1217 1218 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1219 part = SDPART(dev); 1220 1221 /* Check for acceptable drive number. */ 1222 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1223 return (ENXIO); 1224 1225 /* Make sure it was initialized. */ 1226 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED) 1227 return (ENXIO); 1228 1229 /* Convert to disk sectors. Request must be a multiple of size. */ 1230 lp = sd->sc_dk.dk_label; 1231 sectorsize = lp->d_secsize; 1232 if ((size % sectorsize) != 0) 1233 return (EFAULT); 1234 totwrt = size / sectorsize; 1235 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1236 1237 nsects = lp->d_partitions[part].p_size; 1238 sectoff = lp->d_partitions[part].p_offset; 1239 1240 /* Check transfer bounds against partition size. */ 1241 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1242 return (EINVAL); 1243 1244 /* Offset block number to start of partition. */ 1245 blkno += sectoff; 1246 1247 xs = &sx; 1248 1249 while (totwrt > 0) { 1250 nwrt = totwrt; /* XXX */ 1251 #ifndef SD_DUMP_NOT_TRUSTED 1252 /* 1253 * Fill out the scsi command 1254 */ 1255 bzero(&cmd, sizeof(cmd)); 1256 cmd.opcode = WRITE_BIG; 1257 _lto4b(blkno, cmd.addr); 1258 _lto2b(nwrt, cmd.length); 1259 /* 1260 * Fill out the scsipi_xfer structure 1261 * Note: we cannot sleep as we may be an interrupt 1262 * don't use scsipi_command() as it may want to wait 1263 * for an xs. 1264 */ 1265 bzero(xs, sizeof(sx)); 1266 xs->xs_control |= XS_CTL_NOSLEEP | XS_CTL_POLL | 1267 XS_CTL_DATA_OUT; 1268 xs->xs_status = 0; 1269 xs->sc_link = sd->sc_link; 1270 xs->retries = SDRETRIES; 1271 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1272 xs->cmd = (struct scsipi_generic *)&cmd; 1273 xs->cmdlen = sizeof(cmd); 1274 xs->resid = nwrt * sectorsize; 1275 xs->error = XS_NOERROR; 1276 xs->bp = 0; 1277 xs->data = va; 1278 xs->datalen = nwrt * sectorsize; 1279 1280 /* 1281 * Pass all this info to the scsi driver. 1282 */ 1283 retval = scsipi_command_direct(xs); 1284 if (retval != COMPLETE) 1285 return (ENXIO); 1286 #else /* SD_DUMP_NOT_TRUSTED */ 1287 /* Let's just talk about this first... */ 1288 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1289 delay(500 * 1000); /* half a second */ 1290 #endif /* SD_DUMP_NOT_TRUSTED */ 1291 1292 /* update block count */ 1293 totwrt -= nwrt; 1294 blkno += nwrt; 1295 va += sectorsize * nwrt; 1296 } 1297 sddoingadump = 0; 1298 return (0); 1299 } 1300 #else /* __BDEVSW_DUMP_NEW_TYPE */ 1301 int 1302 sddump(dev, blkno, va, size) 1303 dev_t dev; 1304 daddr_t blkno; 1305 caddr_t va; 1306 size_t size; 1307 { 1308 1309 /* Not implemented. */ 1310 return (ENXIO); 1311 } 1312 #endif /* __BDEVSW_DUMP_NEW_TYPE */ 1313