1 /* $NetBSD: sd.c,v 1.138 1998/12/08 00:18:46 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian@dialix.oz.au) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992 54 */ 55 56 #include "opt_scsi.h" 57 #include "rnd.h" 58 59 #include <sys/types.h> 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/kernel.h> 63 #include <sys/file.h> 64 #include <sys/stat.h> 65 #include <sys/ioctl.h> 66 #include <sys/buf.h> 67 #include <sys/uio.h> 68 #include <sys/malloc.h> 69 #include <sys/errno.h> 70 #include <sys/device.h> 71 #include <sys/disklabel.h> 72 #include <sys/disk.h> 73 #include <sys/proc.h> 74 #include <sys/conf.h> 75 #if NRND > 0 76 #include <sys/rnd.h> 77 #endif 78 79 #include <dev/scsipi/scsipi_all.h> 80 #include <dev/scsipi/scsi_all.h> 81 #include <dev/scsipi/scsipi_disk.h> 82 #include <dev/scsipi/scsi_disk.h> 83 #include <dev/scsipi/scsiconf.h> 84 #include <dev/scsipi/sdvar.h> 85 86 #include "sd.h" /* NSD_SCSIBUS and NSD_ATAPIBUS come from here */ 87 88 #ifndef SDOUTSTANDING 89 #define SDOUTSTANDING 4 90 #endif 91 92 #define SDUNIT(dev) DISKUNIT(dev) 93 #define SDPART(dev) DISKPART(dev) 94 #define MAKESDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part) 95 96 #define SDLABELDEV(dev) (MAKESDDEV(major(dev), SDUNIT(dev), RAW_PART)) 97 98 int sdlock __P((struct sd_softc *)); 99 void sdunlock __P((struct sd_softc *)); 100 void sdminphys __P((struct buf *)); 101 void sdgetdefaultlabel __P((struct sd_softc *, struct disklabel *)); 102 void sdgetdisklabel __P((struct sd_softc *)); 103 void sdstart __P((void *)); 104 void sddone __P((struct scsipi_xfer *)); 105 void sd_shutdown __P((void *)); 106 int sd_reassign_blocks __P((struct sd_softc *, u_long)); 107 int sd_interpret_sense __P((struct scsipi_xfer *)); 108 109 extern struct cfdriver sd_cd; 110 111 struct dkdriver sddkdriver = { sdstrategy }; 112 113 struct scsipi_device sd_switch = { 114 sd_interpret_sense, /* check our error handler first */ 115 sdstart, /* have a queue, served by this */ 116 NULL, /* have no async handler */ 117 sddone, /* deal with stats at interrupt time */ 118 }; 119 120 /* 121 * The routine called by the low level scsi routine when it discovers 122 * a device suitable for this driver. 123 */ 124 void 125 sdattach(parent, sd, sc_link, ops) 126 struct device *parent; 127 struct sd_softc *sd; 128 struct scsipi_link *sc_link; 129 const struct sd_ops *ops; 130 { 131 int error, result; 132 struct disk_parms *dp = &sd->params; 133 134 SC_DEBUG(sc_link, SDEV_DB2, ("sdattach: ")); 135 136 /* 137 * Store information needed to contact our base driver 138 */ 139 sd->sc_link = sc_link; 140 sd->sc_ops = ops; 141 sc_link->device = &sd_switch; 142 sc_link->device_softc = sd; 143 if (sc_link->openings > SDOUTSTANDING) 144 sc_link->openings = SDOUTSTANDING; 145 146 /* 147 * Initialize and attach the disk structure. 148 */ 149 sd->sc_dk.dk_driver = &sddkdriver; 150 sd->sc_dk.dk_name = sd->sc_dev.dv_xname; 151 disk_attach(&sd->sc_dk); 152 153 #if !defined(i386) 154 dk_establish(&sd->sc_dk, &sd->sc_dev); /* XXX */ 155 #endif 156 157 /* 158 * Use the subdriver to request information regarding 159 * the drive. We cannot use interrupts yet, so the 160 * request must specify this. 161 */ 162 printf("\n"); 163 164 if ((sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 165 error = scsipi_start(sd->sc_link, SSS_START, 166 SCSI_AUTOCONF | SCSI_IGNORE_ILLEGAL_REQUEST | 167 SCSI_IGNORE_MEDIA_CHANGE | SCSI_SILENT); 168 } else 169 error = 0; 170 171 if (error) 172 result = SDGP_RESULT_OFFLINE; 173 else 174 result = (*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 175 SCSI_AUTOCONF); 176 printf("%s: ", sd->sc_dev.dv_xname); 177 switch (result) { 178 case SDGP_RESULT_OK: 179 printf("%ldMB, %ld cyl, %ld head, %ld sec, %ld bytes/sect x %ld sectors", 180 dp->disksize / (1048576 / dp->blksize), dp->cyls, 181 dp->heads, dp->sectors, dp->blksize, dp->disksize); 182 break; 183 184 case SDGP_RESULT_OFFLINE: 185 printf("drive offline"); 186 break; 187 188 case SDGP_RESULT_UNFORMATTED: 189 printf("unformatted media"); 190 break; 191 192 #ifdef DIAGNOSTIC 193 default: 194 panic("sdattach: unknown result from get_parms"); 195 break; 196 #endif 197 } 198 printf("\n"); 199 200 /* 201 * Establish a shutdown hook so that we can ensure that 202 * our data has actually made it onto the platter at 203 * shutdown time. Note that this relies on the fact 204 * that the shutdown hook code puts us at the head of 205 * the list (thus guaranteeing that our hook runs before 206 * our ancestors'). 207 */ 208 if ((sd->sc_sdhook = 209 shutdownhook_establish(sd_shutdown, sd)) == NULL) 210 printf("%s: WARNING: unable to establish shutdown hook\n", 211 sd->sc_dev.dv_xname); 212 213 #if NRND > 0 214 /* 215 * attach the device into the random source list 216 */ 217 rnd_attach_source(&sd->rnd_source, sd->sc_dev.dv_xname, RND_TYPE_DISK); 218 #endif 219 } 220 221 /* 222 * Wait interruptibly for an exclusive lock. 223 * 224 * XXX 225 * Several drivers do this; it should be abstracted and made MP-safe. 226 */ 227 int 228 sdlock(sd) 229 struct sd_softc *sd; 230 { 231 int error; 232 233 while ((sd->flags & SDF_LOCKED) != 0) { 234 sd->flags |= SDF_WANTED; 235 if ((error = tsleep(sd, PRIBIO | PCATCH, "sdlck", 0)) != 0) 236 return (error); 237 } 238 sd->flags |= SDF_LOCKED; 239 return (0); 240 } 241 242 /* 243 * Unlock and wake up any waiters. 244 */ 245 void 246 sdunlock(sd) 247 struct sd_softc *sd; 248 { 249 250 sd->flags &= ~SDF_LOCKED; 251 if ((sd->flags & SDF_WANTED) != 0) { 252 sd->flags &= ~SDF_WANTED; 253 wakeup(sd); 254 } 255 } 256 257 /* 258 * open the device. Make sure the partition info is a up-to-date as can be. 259 */ 260 int 261 sdopen(dev, flag, fmt, p) 262 dev_t dev; 263 int flag, fmt; 264 struct proc *p; 265 { 266 struct sd_softc *sd; 267 struct scsipi_link *sc_link; 268 int unit, part; 269 int error; 270 271 unit = SDUNIT(dev); 272 if (unit >= sd_cd.cd_ndevs) 273 return (ENXIO); 274 sd = sd_cd.cd_devs[unit]; 275 if (sd == NULL) 276 return (ENXIO); 277 278 sc_link = sd->sc_link; 279 280 SC_DEBUG(sc_link, SDEV_DB1, 281 ("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit, 282 sd_cd.cd_ndevs, SDPART(dev))); 283 284 /* 285 * If this is the first open of this device, add a reference 286 * to the adapter. 287 */ 288 if (sd->sc_dk.dk_openmask == 0 && 289 (error = scsipi_adapter_addref(sc_link)) != 0) 290 return (error); 291 292 if ((error = sdlock(sd)) != 0) 293 goto bad4; 294 295 if (sd->sc_dk.dk_openmask != 0) { 296 /* 297 * If any partition is open, but the disk has been invalidated, 298 * disallow further opens. 299 */ 300 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 301 error = EIO; 302 goto bad3; 303 } 304 } else { 305 /* Check that it is still responding and ok. */ 306 error = scsipi_test_unit_ready(sc_link, 307 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE | 308 SCSI_IGNORE_NOT_READY); 309 if (error) 310 goto bad3; 311 312 /* Start the pack spinning if necessary. */ 313 if ((sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 314 error = scsipi_start(sc_link, SSS_START, 315 SCSI_IGNORE_ILLEGAL_REQUEST | 316 SCSI_IGNORE_MEDIA_CHANGE | SCSI_SILENT); 317 if (error) 318 goto bad3; 319 } 320 321 sc_link->flags |= SDEV_OPEN; 322 323 /* Lock the pack in. */ 324 error = scsipi_prevent(sc_link, PR_PREVENT, 325 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE); 326 if (error) 327 goto bad; 328 329 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 330 sc_link->flags |= SDEV_MEDIA_LOADED; 331 332 /* 333 * Load the physical device parameters. 334 * 335 * Note that if media is present but unformatted, 336 * we allow the open (so that it can be formatted!). 337 * The drive should refuse real I/O, if the media is 338 * unformatted. 339 */ 340 if ((*sd->sc_ops->sdo_get_parms)(sd, &sd->params, 341 0) == SDGP_RESULT_OFFLINE) { 342 error = ENXIO; 343 goto bad2; 344 } 345 SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded ")); 346 347 /* Load the partition info if not already loaded. */ 348 sdgetdisklabel(sd); 349 SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded ")); 350 } 351 } 352 353 part = SDPART(dev); 354 355 /* Check that the partition exists. */ 356 if (part != RAW_PART && 357 (part >= sd->sc_dk.dk_label->d_npartitions || 358 sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 359 error = ENXIO; 360 goto bad; 361 } 362 363 /* Insure only one open at a time. */ 364 switch (fmt) { 365 case S_IFCHR: 366 sd->sc_dk.dk_copenmask |= (1 << part); 367 break; 368 case S_IFBLK: 369 sd->sc_dk.dk_bopenmask |= (1 << part); 370 break; 371 } 372 sd->sc_dk.dk_openmask = 373 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 374 375 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 376 sdunlock(sd); 377 return (0); 378 379 bad2: 380 sc_link->flags &= ~SDEV_MEDIA_LOADED; 381 382 bad: 383 if (sd->sc_dk.dk_openmask == 0) { 384 scsipi_prevent(sc_link, PR_ALLOW, 385 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE); 386 sc_link->flags &= ~SDEV_OPEN; 387 } 388 389 bad3: 390 sdunlock(sd); 391 bad4: 392 if (sd->sc_dk.dk_openmask == 0) 393 scsipi_adapter_delref(sc_link); 394 return (error); 395 } 396 397 /* 398 * close the device.. only called if we are the LAST occurence of an open 399 * device. Convenient now but usually a pain. 400 */ 401 int 402 sdclose(dev, flag, fmt, p) 403 dev_t dev; 404 int flag, fmt; 405 struct proc *p; 406 { 407 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 408 int part = SDPART(dev); 409 int error; 410 411 if ((error = sdlock(sd)) != 0) 412 return (error); 413 414 switch (fmt) { 415 case S_IFCHR: 416 sd->sc_dk.dk_copenmask &= ~(1 << part); 417 break; 418 case S_IFBLK: 419 sd->sc_dk.dk_bopenmask &= ~(1 << part); 420 break; 421 } 422 sd->sc_dk.dk_openmask = 423 sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask; 424 425 if (sd->sc_dk.dk_openmask == 0) { 426 /* 427 * If the disk cache needs flushing, and the disk supports 428 * it, do it now. 429 */ 430 if ((sd->flags & SDF_DIRTY) != 0 && 431 sd->sc_ops->sdo_flush != NULL) 432 (*sd->sc_ops->sdo_flush)(sd, 0); 433 434 scsipi_wait_drain(sd->sc_link); 435 436 scsipi_prevent(sd->sc_link, PR_ALLOW, 437 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 438 sd->sc_link->flags &= ~(SDEV_OPEN|SDEV_MEDIA_LOADED); 439 440 scsipi_wait_drain(sd->sc_link); 441 442 scsipi_adapter_delref(sd->sc_link); 443 } 444 445 sdunlock(sd); 446 return (0); 447 } 448 449 /* 450 * Actually translate the requested transfer into one the physical driver 451 * can understand. The transfer is described by a buf and will include 452 * only one physical transfer. 453 */ 454 void 455 sdstrategy(bp) 456 struct buf *bp; 457 { 458 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 459 int s; 460 461 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy ")); 462 SC_DEBUG(sd->sc_link, SDEV_DB1, 463 ("%ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 464 /* 465 * The transfer must be a whole number of blocks. 466 */ 467 if ((bp->b_bcount % sd->sc_dk.dk_label->d_secsize) != 0) { 468 bp->b_error = EINVAL; 469 goto bad; 470 } 471 /* 472 * If the device has been made invalid, error out 473 */ 474 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 475 bp->b_error = EIO; 476 goto bad; 477 } 478 /* 479 * If it's a null transfer, return immediatly 480 */ 481 if (bp->b_bcount == 0) 482 goto done; 483 484 /* 485 * Do bounds checking, adjust transfer. if error, process. 486 * If end of partition, just return. 487 */ 488 if (SDPART(bp->b_dev) != RAW_PART && 489 bounds_check_with_label(bp, sd->sc_dk.dk_label, 490 (sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0) 491 goto done; 492 493 s = splbio(); 494 495 /* 496 * Place it in the queue of disk activities for this disk 497 */ 498 disksort(&sd->buf_queue, bp); 499 500 /* 501 * Tell the device to get going on the transfer if it's 502 * not doing anything, otherwise just wait for completion 503 */ 504 sdstart(sd); 505 506 splx(s); 507 return; 508 509 bad: 510 bp->b_flags |= B_ERROR; 511 done: 512 /* 513 * Correctly set the buf to indicate a completed xfer 514 */ 515 bp->b_resid = bp->b_bcount; 516 biodone(bp); 517 } 518 519 /* 520 * sdstart looks to see if there is a buf waiting for the device 521 * and that the device is not already busy. If both are true, 522 * It dequeues the buf and creates a scsi command to perform the 523 * transfer in the buf. The transfer request will call scsipi_done 524 * on completion, which will in turn call this routine again 525 * so that the next queued transfer is performed. 526 * The bufs are queued by the strategy routine (sdstrategy) 527 * 528 * This routine is also called after other non-queued requests 529 * have been made of the scsi driver, to ensure that the queue 530 * continues to be drained. 531 * 532 * must be called at the correct (highish) spl level 533 * sdstart() is called at splbio from sdstrategy and scsipi_done 534 */ 535 void 536 sdstart(v) 537 register void *v; 538 { 539 register struct sd_softc *sd = v; 540 register struct scsipi_link *sc_link = sd->sc_link; 541 struct disklabel *lp = sd->sc_dk.dk_label; 542 struct buf *bp = 0; 543 struct buf *dp; 544 struct scsipi_rw_big cmd_big; 545 #if NSD_SCSIBUS > 0 546 struct scsi_rw cmd_small; 547 #endif 548 struct scsipi_generic *cmdp; 549 int blkno, nblks, cmdlen, error; 550 struct partition *p; 551 552 SC_DEBUG(sc_link, SDEV_DB2, ("sdstart ")); 553 /* 554 * Check if the device has room for another command 555 */ 556 while (sc_link->openings > 0) { 557 /* 558 * there is excess capacity, but a special waits 559 * It'll need the adapter as soon as we clear out of the 560 * way and let it run (user level wait). 561 */ 562 if (sc_link->flags & SDEV_WAITING) { 563 sc_link->flags &= ~SDEV_WAITING; 564 wakeup((caddr_t)sc_link); 565 return; 566 } 567 568 /* 569 * See if there is a buf with work for us to do.. 570 */ 571 dp = &sd->buf_queue; 572 if ((bp = dp->b_actf) == NULL) /* yes, an assign */ 573 return; 574 dp->b_actf = bp->b_actf; 575 576 /* 577 * If the device has become invalid, abort all the 578 * reads and writes until all files have been closed and 579 * re-opened 580 */ 581 if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) { 582 bp->b_error = EIO; 583 bp->b_flags |= B_ERROR; 584 bp->b_resid = bp->b_bcount; 585 biodone(bp); 586 continue; 587 } 588 589 /* 590 * We have a buf, now we should make a command 591 * 592 * First, translate the block to absolute and put it in terms 593 * of the logical blocksize of the device. 594 */ 595 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 596 if (SDPART(bp->b_dev) != RAW_PART) { 597 p = &lp->d_partitions[SDPART(bp->b_dev)]; 598 blkno += p->p_offset; 599 } 600 nblks = howmany(bp->b_bcount, lp->d_secsize); 601 602 #if NSD_SCSIBUS > 0 603 /* 604 * Fill out the scsi command. If the transfer will 605 * fit in a "small" cdb, use it. 606 */ 607 if (((blkno & 0x1fffff) == blkno) && 608 ((nblks & 0xff) == nblks) && sc_link->type == BUS_SCSI) { 609 /* 610 * We can fit in a small cdb. 611 */ 612 bzero(&cmd_small, sizeof(cmd_small)); 613 cmd_small.opcode = (bp->b_flags & B_READ) ? 614 SCSI_READ_COMMAND : SCSI_WRITE_COMMAND; 615 _lto3b(blkno, cmd_small.addr); 616 cmd_small.length = nblks & 0xff; 617 cmdlen = sizeof(cmd_small); 618 cmdp = (struct scsipi_generic *)&cmd_small; 619 } else 620 #endif 621 { 622 /* 623 * Need a large cdb. 624 */ 625 bzero(&cmd_big, sizeof(cmd_big)); 626 cmd_big.opcode = (bp->b_flags & B_READ) ? 627 READ_BIG : WRITE_BIG; 628 _lto4b(blkno, cmd_big.addr); 629 _lto2b(nblks, cmd_big.length); 630 cmdlen = sizeof(cmd_big); 631 cmdp = (struct scsipi_generic *)&cmd_big; 632 } 633 634 /* Instrumentation. */ 635 disk_busy(&sd->sc_dk); 636 637 /* 638 * Mark the disk dirty so that the cache will be 639 * flushed on close. 640 */ 641 if ((bp->b_flags & B_READ) == 0) 642 sd->flags |= SDF_DIRTY; 643 644 /* 645 * Call the routine that chats with the adapter. 646 * Note: we cannot sleep as we may be an interrupt 647 */ 648 error = scsipi_command(sc_link, cmdp, cmdlen, 649 (u_char *)bp->b_data, bp->b_bcount, 650 SDRETRIES, 60000, bp, SCSI_NOSLEEP | 651 ((bp->b_flags & B_READ) ? SCSI_DATA_IN : SCSI_DATA_OUT)); 652 if (error) { 653 disk_unbusy(&sd->sc_dk, 0); 654 printf("%s: not queued, error %d\n", 655 sd->sc_dev.dv_xname, error); 656 } 657 } 658 } 659 660 void 661 sddone(xs) 662 struct scsipi_xfer *xs; 663 { 664 struct sd_softc *sd = xs->sc_link->device_softc; 665 666 if (sd->flags & SDF_FLUSHING) { 667 /* Flush completed, no longer dirty. */ 668 sd->flags &= ~(SDF_FLUSHING|SDF_DIRTY); 669 } 670 671 if (xs->bp != NULL) { 672 disk_unbusy(&sd->sc_dk, xs->bp->b_bcount - xs->bp->b_resid); 673 #if NRND > 0 674 rnd_add_uint32(&sd->rnd_source, xs->bp->b_blkno); 675 #endif 676 } 677 } 678 679 void 680 sdminphys(bp) 681 struct buf *bp; 682 { 683 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(bp->b_dev)]; 684 long max; 685 686 /* 687 * If the device is ancient, we want to make sure that 688 * the transfer fits into a 6-byte cdb. 689 * 690 * XXX Note that the SCSI-I spec says that 256-block transfers 691 * are allowed in a 6-byte read/write, and are specified 692 * by settng the "length" to 0. However, we're conservative 693 * here, allowing only 255-block transfers in case an 694 * ancient device gets confused by length == 0. A length of 0 695 * in a 10-byte read/write actually means 0 blocks. 696 */ 697 if (sd->flags & SDF_ANCIENT) { 698 max = sd->sc_dk.dk_label->d_secsize * 0xff; 699 700 if (bp->b_bcount > max) 701 bp->b_bcount = max; 702 } 703 704 (*sd->sc_link->adapter->scsipi_minphys)(bp); 705 } 706 707 int 708 sdread(dev, uio, ioflag) 709 dev_t dev; 710 struct uio *uio; 711 int ioflag; 712 { 713 714 return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio)); 715 } 716 717 int 718 sdwrite(dev, uio, ioflag) 719 dev_t dev; 720 struct uio *uio; 721 int ioflag; 722 { 723 724 return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio)); 725 } 726 727 /* 728 * Perform special action on behalf of the user 729 * Knows about the internals of this device 730 */ 731 int 732 sdioctl(dev, cmd, addr, flag, p) 733 dev_t dev; 734 u_long cmd; 735 caddr_t addr; 736 int flag; 737 struct proc *p; 738 { 739 struct sd_softc *sd = sd_cd.cd_devs[SDUNIT(dev)]; 740 int error; 741 742 SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd)); 743 744 /* 745 * If the device is not valid.. abandon ship 746 */ 747 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) 748 return (EIO); 749 750 switch (cmd) { 751 case DIOCGDINFO: 752 *(struct disklabel *)addr = *(sd->sc_dk.dk_label); 753 return (0); 754 755 case DIOCGPART: 756 ((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label; 757 ((struct partinfo *)addr)->part = 758 &sd->sc_dk.dk_label->d_partitions[SDPART(dev)]; 759 return (0); 760 761 case DIOCWDINFO: 762 case DIOCSDINFO: 763 if ((flag & FWRITE) == 0) 764 return (EBADF); 765 766 if ((error = sdlock(sd)) != 0) 767 return (error); 768 sd->flags |= SDF_LABELLING; 769 770 error = setdisklabel(sd->sc_dk.dk_label, 771 (struct disklabel *)addr, /*sd->sc_dk.dk_openmask : */0, 772 sd->sc_dk.dk_cpulabel); 773 if (error == 0) { 774 if (cmd == DIOCWDINFO) 775 error = writedisklabel(SDLABELDEV(dev), 776 sdstrategy, sd->sc_dk.dk_label, 777 sd->sc_dk.dk_cpulabel); 778 } 779 780 sd->flags &= ~SDF_LABELLING; 781 sdunlock(sd); 782 return (error); 783 784 case DIOCWLABEL: 785 if ((flag & FWRITE) == 0) 786 return (EBADF); 787 if (*(int *)addr) 788 sd->flags |= SDF_WLABEL; 789 else 790 sd->flags &= ~SDF_WLABEL; 791 return (0); 792 793 case DIOCLOCK: 794 return (scsipi_prevent(sd->sc_link, 795 (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0)); 796 797 case DIOCEJECT: 798 return ((sd->sc_link->flags & SDEV_REMOVABLE) == 0 ? ENOTTY : 799 scsipi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0)); 800 801 case DIOCGDEFLABEL: 802 sdgetdefaultlabel(sd, (struct disklabel *)addr); 803 return (0); 804 805 default: 806 if (SDPART(dev) != RAW_PART) 807 return (ENOTTY); 808 return (scsipi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p)); 809 } 810 811 #ifdef DIAGNOSTIC 812 panic("sdioctl: impossible"); 813 #endif 814 } 815 816 void 817 sdgetdefaultlabel(sd, lp) 818 struct sd_softc *sd; 819 struct disklabel *lp; 820 { 821 822 bzero(lp, sizeof(struct disklabel)); 823 824 lp->d_secsize = sd->params.blksize; 825 lp->d_ntracks = sd->params.heads; 826 lp->d_nsectors = sd->params.sectors; 827 lp->d_ncylinders = sd->params.cyls; 828 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 829 830 switch (sd->sc_link->type) { 831 #if NSD_SCSIBUS > 0 832 case BUS_SCSI: 833 lp->d_type = DTYPE_SCSI; 834 break; 835 #endif 836 #if NSD_ATAPIBUS > 0 837 case BUS_ATAPI: 838 lp->d_type = DTYPE_ATAPI; 839 break; 840 #endif 841 } 842 strncpy(lp->d_typename, sd->name, 16); 843 strncpy(lp->d_packname, "fictitious", 16); 844 lp->d_secperunit = sd->params.disksize; 845 lp->d_rpm = sd->params.rot_rate; 846 lp->d_interleave = 1; 847 lp->d_flags = 0; 848 849 lp->d_partitions[RAW_PART].p_offset = 0; 850 lp->d_partitions[RAW_PART].p_size = 851 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 852 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 853 lp->d_npartitions = RAW_PART + 1; 854 855 lp->d_magic = DISKMAGIC; 856 lp->d_magic2 = DISKMAGIC; 857 lp->d_checksum = dkcksum(lp); 858 } 859 860 861 /* 862 * Load the label information on the named device 863 */ 864 void 865 sdgetdisklabel(sd) 866 struct sd_softc *sd; 867 { 868 struct disklabel *lp = sd->sc_dk.dk_label; 869 char *errstring; 870 871 bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel)); 872 873 sdgetdefaultlabel(sd, lp); 874 875 if (lp->d_secpercyl == 0) { 876 lp->d_secpercyl = 100; 877 /* as long as it's not 0 - readdisklabel divides by it (?) */ 878 } 879 880 /* 881 * Call the generic disklabel extraction routine 882 */ 883 errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART), 884 sdstrategy, lp, sd->sc_dk.dk_cpulabel); 885 if (errstring) { 886 printf("%s: %s\n", sd->sc_dev.dv_xname, errstring); 887 return; 888 } 889 } 890 891 void 892 sd_shutdown(arg) 893 void *arg; 894 { 895 struct sd_softc *sd = arg; 896 897 /* 898 * If the disk cache needs to be flushed, and the disk supports 899 * it, flush it. We're cold at this point, so we poll for 900 * completion. 901 */ 902 if ((sd->flags & SDF_DIRTY) != 0 && sd->sc_ops->sdo_flush != NULL) 903 (*sd->sc_ops->sdo_flush)(sd, SCSI_AUTOCONF); 904 } 905 906 /* 907 * Tell the device to map out a defective block 908 */ 909 int 910 sd_reassign_blocks(sd, blkno) 911 struct sd_softc *sd; 912 u_long blkno; 913 { 914 struct scsi_reassign_blocks scsipi_cmd; 915 struct scsi_reassign_blocks_data rbdata; 916 917 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 918 bzero(&rbdata, sizeof(rbdata)); 919 scsipi_cmd.opcode = SCSI_REASSIGN_BLOCKS; 920 921 _lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length); 922 _lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr); 923 924 return (scsipi_command(sd->sc_link, 925 (struct scsipi_generic *)&scsipi_cmd, sizeof(scsipi_cmd), 926 (u_char *)&rbdata, sizeof(rbdata), SDRETRIES, 5000, NULL, 927 SCSI_DATA_OUT)); 928 } 929 930 /* 931 * Check Errors 932 */ 933 int 934 sd_interpret_sense(xs) 935 struct scsipi_xfer *xs; 936 { 937 struct scsipi_link *sc_link = xs->sc_link; 938 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 939 struct sd_softc *sd = sc_link->device_softc; 940 int retval = SCSIRET_CONTINUE; 941 942 /* 943 * If the device is not open yet, let the generic code handle it. 944 */ 945 if ((sc_link->flags & SDEV_OPEN) == 0) { 946 return (retval); 947 } 948 949 /* 950 * If it isn't a extended or extended/deferred error, let 951 * the generic code handle it. 952 */ 953 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 954 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 955 return (retval); 956 } 957 958 if ((sense->flags & SSD_KEY) == SKEY_NOT_READY && 959 sense->add_sense_code == 0x4) { 960 if (sense->add_sense_code_qual == 0x01) { 961 printf("%s: ..is spinning up...waiting\n", 962 sd->sc_dev.dv_xname); 963 /* 964 * I really need a sdrestart function I can call here. 965 */ 966 delay(1000000 * 5); /* 5 seconds */ 967 retval = SCSIRET_RETRY; 968 } else if ((sense->add_sense_code_qual == 0x2) && 969 (sd->sc_link->quirks & SDEV_NOSTARTUNIT) == 0) { 970 if (sd->sc_link->flags & SDEV_REMOVABLE) { 971 printf("%s: removable disk stopped- not " 972 "restarting\n", sd->sc_dev.dv_xname); 973 retval = EIO; 974 } else { 975 printf("%s: respinning up disk\n", 976 sd->sc_dev.dv_xname); 977 retval = scsipi_start(sd->sc_link, SSS_START, 978 SCSI_URGENT | SCSI_NOSLEEP); 979 if (retval != 0) { 980 printf("%s: respin of disk failed-%d\n", 981 sd->sc_dev.dv_xname, retval); 982 retval = EIO; 983 } else { 984 retval = SCSIRET_RETRY; 985 } 986 } 987 } 988 } 989 return (retval); 990 } 991 992 993 int 994 sdsize(dev) 995 dev_t dev; 996 { 997 struct sd_softc *sd; 998 int part, unit, omask; 999 int size; 1000 1001 unit = SDUNIT(dev); 1002 if (unit >= sd_cd.cd_ndevs) 1003 return (-1); 1004 sd = sd_cd.cd_devs[unit]; 1005 if (sd == NULL) 1006 return (-1); 1007 1008 part = SDPART(dev); 1009 omask = sd->sc_dk.dk_openmask & (1 << part); 1010 1011 if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) 1012 return (-1); 1013 if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1014 size = -1; 1015 else 1016 size = sd->sc_dk.dk_label->d_partitions[part].p_size * 1017 (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1018 if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0) 1019 return (-1); 1020 return (size); 1021 } 1022 1023 #ifndef __BDEVSW_DUMP_OLD_TYPE 1024 /* #define SD_DUMP_NOT_TRUSTED if you just want to watch */ 1025 static struct scsipi_xfer sx; 1026 static int sddoingadump; 1027 1028 /* 1029 * dump all of physical memory into the partition specified, starting 1030 * at offset 'dumplo' into the partition. 1031 */ 1032 int 1033 sddump(dev, blkno, va, size) 1034 dev_t dev; 1035 daddr_t blkno; 1036 caddr_t va; 1037 size_t size; 1038 { 1039 struct sd_softc *sd; /* disk unit to do the I/O */ 1040 struct disklabel *lp; /* disk's disklabel */ 1041 int unit, part; 1042 int sectorsize; /* size of a disk sector */ 1043 int nsects; /* number of sectors in partition */ 1044 int sectoff; /* sector offset of partition */ 1045 int totwrt; /* total number of sectors left to write */ 1046 int nwrt; /* current number of sectors to write */ 1047 struct scsipi_rw_big cmd; /* write command */ 1048 struct scsipi_xfer *xs; /* ... convenience */ 1049 int retval; 1050 1051 /* Check if recursive dump; if so, punt. */ 1052 if (sddoingadump) 1053 return (EFAULT); 1054 1055 /* Mark as active early. */ 1056 sddoingadump = 1; 1057 1058 unit = SDUNIT(dev); /* Decompose unit & partition. */ 1059 part = SDPART(dev); 1060 1061 /* Check for acceptable drive number. */ 1062 if (unit >= sd_cd.cd_ndevs || (sd = sd_cd.cd_devs[unit]) == NULL) 1063 return (ENXIO); 1064 1065 /* 1066 * XXX Can't do this check, since the media might have been 1067 * XXX marked `invalid' by successful unmounting of all 1068 * XXX filesystems. 1069 */ 1070 #if 0 1071 /* Make sure it was initialized. */ 1072 if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED) 1073 return (ENXIO); 1074 #endif 1075 1076 /* Convert to disk sectors. Request must be a multiple of size. */ 1077 lp = sd->sc_dk.dk_label; 1078 sectorsize = lp->d_secsize; 1079 if ((size % sectorsize) != 0) 1080 return (EFAULT); 1081 totwrt = size / sectorsize; 1082 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1083 1084 nsects = lp->d_partitions[part].p_size; 1085 sectoff = lp->d_partitions[part].p_offset; 1086 1087 /* Check transfer bounds against partition size. */ 1088 if ((blkno < 0) || ((blkno + totwrt) > nsects)) 1089 return (EINVAL); 1090 1091 /* Offset block number to start of partition. */ 1092 blkno += sectoff; 1093 1094 xs = &sx; 1095 1096 while (totwrt > 0) { 1097 nwrt = totwrt; /* XXX */ 1098 #ifndef SD_DUMP_NOT_TRUSTED 1099 /* 1100 * Fill out the scsi command 1101 */ 1102 bzero(&cmd, sizeof(cmd)); 1103 cmd.opcode = WRITE_BIG; 1104 _lto4b(blkno, cmd.addr); 1105 _lto2b(nwrt, cmd.length); 1106 /* 1107 * Fill out the scsipi_xfer structure 1108 * Note: we cannot sleep as we may be an interrupt 1109 * don't use scsipi_command() as it may want to wait 1110 * for an xs. 1111 */ 1112 bzero(xs, sizeof(sx)); 1113 xs->flags |= SCSI_AUTOCONF | INUSE | SCSI_DATA_OUT; 1114 xs->sc_link = sd->sc_link; 1115 xs->retries = SDRETRIES; 1116 xs->timeout = 10000; /* 10000 millisecs for a disk ! */ 1117 xs->cmd = (struct scsipi_generic *)&cmd; 1118 xs->cmdlen = sizeof(cmd); 1119 xs->resid = nwrt * sectorsize; 1120 xs->error = XS_NOERROR; 1121 xs->bp = 0; 1122 xs->data = va; 1123 xs->datalen = nwrt * sectorsize; 1124 1125 /* 1126 * Pass all this info to the scsi driver. 1127 */ 1128 retval = scsipi_command_direct(xs); 1129 if (retval != COMPLETE) 1130 return (ENXIO); 1131 #else /* SD_DUMP_NOT_TRUSTED */ 1132 /* Let's just talk about this first... */ 1133 printf("sd%d: dump addr 0x%x, blk %d\n", unit, va, blkno); 1134 delay(500 * 1000); /* half a second */ 1135 #endif /* SD_DUMP_NOT_TRUSTED */ 1136 1137 /* update block count */ 1138 totwrt -= nwrt; 1139 blkno += nwrt; 1140 va += sectorsize * nwrt; 1141 } 1142 sddoingadump = 0; 1143 return (0); 1144 } 1145 #else /* __BDEVSW_DUMP_NEW_TYPE */ 1146 int 1147 sddump(dev, blkno, va, size) 1148 dev_t dev; 1149 daddr_t blkno; 1150 caddr_t va; 1151 size_t size; 1152 { 1153 1154 /* Not implemented. */ 1155 return (ENXIO); 1156 } 1157 #endif /* __BDEVSW_DUMP_NEW_TYPE */ 1158