iwm_fd.c revision 1.24
1 /* $NetBSD: iwm_fd.c,v 1.24 2003/07/15 02:43:25 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998 Hauke Fath. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * iwm_fd.c -- Sony (floppy disk) driver for m68k Macintoshes 31 * 32 * The present implementation supports the GCR format (800K) on 33 * non-{DMA,IOP} machines. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: iwm_fd.c,v 1.24 2003/07/15 02:43:25 lukem Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/callout.h> 42 #include <sys/kernel.h> 43 #include <sys/file.h> 44 #include <sys/ioctl.h> 45 #include <sys/malloc.h> 46 #include <sys/device.h> 47 #include <sys/event.h> 48 49 #define FSTYPENAMES 50 #define DKTYPENAMES 51 #include <sys/disklabel.h> 52 53 #include <sys/disk.h> 54 #include <sys/dkbad.h> 55 #include <sys/buf.h> 56 #include <sys/uio.h> 57 #include <sys/stat.h> 58 #include <sys/syslog.h> 59 #include <sys/conf.h> 60 61 #include <machine/autoconf.h> 62 #include <machine/cpu.h> 63 64 #include <mac68k/obio/iwmreg.h> 65 #include <mac68k/obio/iwm_fdvar.h> 66 67 /** 68 ** Private functions 69 **/ 70 static int map_iwm_base __P((vm_offset_t base)); 71 72 /* Autoconfig */ 73 int iwm_match __P((struct device *, struct cfdata *, void *)); 74 void iwm_attach __P((struct device *, struct device *, void *)); 75 int iwm_print __P((void *, const char *)); 76 int fd_match __P((struct device *, struct cfdata *, void *)); 77 void fd_attach __P((struct device *, struct device *, void *)); 78 int fd_print __P((void *, const char *)); 79 80 /* Disklabel stuff */ 81 static void fdGetDiskLabel __P((fd_softc_t *fd, dev_t dev)); 82 static void fdPrintDiskLabel __P((struct disklabel *lp)); 83 84 static fdInfo_t *getFDType __P((short unit)); 85 static fdInfo_t *fdDeviceToType __P((fd_softc_t *fd, dev_t dev)); 86 87 static void fdstart __P((fd_softc_t *fd)); 88 static void remap_geometry __P((daddr_t block, int heads, diskPosition_t *loc)); 89 static void motor_off __P((void *param)); 90 static int seek __P((fd_softc_t *fd, int style)); 91 static int checkTrack __P((diskPosition_t *loc, int debugFlag)); 92 static int initCylinderCache __P((fd_softc_t *fd)); 93 static void invalidateCylinderCache __P((fd_softc_t *fd)); 94 95 #ifdef _LKM 96 static int probe_fd __P((void)); 97 int fd_mod_init __P((void)); 98 void fd_mod_free __P((void)); 99 #endif 100 101 static int fdstart_Init __P((fd_softc_t *fd)); 102 static int fdstart_Seek __P((fd_softc_t *fd)); 103 static int fdstart_Read __P((fd_softc_t *fd)); 104 static int fdstart_Write __P((fd_softc_t *fd)); 105 static int fdstart_Flush __P((fd_softc_t *fd)); 106 static int fdstart_IOFinish __P((fd_softc_t *fd)); 107 static int fdstart_IOErr __P((fd_softc_t *fd)); 108 static int fdstart_Fault __P((fd_softc_t *fd)); 109 static int fdstart_Exit __P((fd_softc_t *fd)); 110 111 112 /** 113 ** Driver debugging 114 **/ 115 116 #ifdef DEBUG 117 #define IWM_DEBUG 118 #endif 119 120 121 static void hexDump __P((u_char *buf, int len)); 122 123 /* 124 * Stuff taken from Egan/Teixeira ch 8: 'if(TRACE_FOO)' debug output 125 * statements don't break indentation, and when DEBUG is not defined, 126 * the compiler code optimizer drops them as dead code. 127 */ 128 #ifdef IWM_DEBUG 129 #define M_TRACE_CONFIG 0x0001 130 #define M_TRACE_OPEN 0x0002 131 #define M_TRACE_CLOSE 0x0004 132 #define M_TRACE_READ 0x0008 133 #define M_TRACE_WRITE 0x0010 134 #define M_TRACE_STRAT (M_TRACE_READ | M_TRACE_WRITE) 135 #define M_TRACE_IOCTL 0x0020 136 #define M_TRACE_STEP 0x0040 137 #define M_TRACE_ALL 0xFFFF 138 139 #define TRACE_CONFIG (iwmDebugging & M_TRACE_CONFIG) 140 #define TRACE_OPEN (iwmDebugging & M_TRACE_OPEN) 141 #define TRACE_CLOSE (iwmDebugging & M_TRACE_CLOSE) 142 #define TRACE_READ (iwmDebugging & M_TRACE_READ) 143 #define TRACE_WRITE (iwmDebugging & M_TRACE_WRITE) 144 #define TRACE_STRAT (iwmDebugging & M_TRACE_STRAT) 145 #define TRACE_IOCTL (iwmDebugging & M_TRACE_IOCTL) 146 #define TRACE_STEP (iwmDebugging & M_TRACE_STEP) 147 #define TRACE_ALL (iwmDebugging & M_TRACE_ALL) 148 149 /* -1 = all active */ 150 int iwmDebugging = 0 /* | M_TRACE_OPEN | M_TRACE_STRAT | M_TRACE_IOCTL */ ; 151 152 #else 153 #define TRACE_CONFIG 0 154 #define TRACE_OPEN 0 155 #define TRACE_CLOSE 0 156 #define TRACE_READ 0 157 #define TRACE_WRITE 0 158 #define TRACE_STRAT 0 159 #define TRACE_IOCTL 0 160 #define TRACE_STEP 0 161 #define TRACE_ALL 0 162 #endif 163 164 #define DISABLED 0 165 166 167 168 /** 169 ** Module-global Variables 170 **/ 171 172 /* The IWM base address */ 173 u_long IWMBase; 174 175 /* 176 * Table of supported disk types. 177 * The table order seems to be pretty standardized across NetBSD ports, but 178 * then, they are all MFM... So we roll our own for now. 179 */ 180 static fdInfo_t fdTypes[] = { 181 {1, 80, 512, 10, 10, 800, 12, 2, IWM_GCR, "400K Sony"}, 182 {2, 80, 512, 10, 20, 1600, 12, 2, IWM_GCR, "800K Sony"} 183 }; 184 185 /* Table of GCR disk zones for one side (see IM II-211, The Disk Driver) */ 186 static diskZone_t diskZones[] = { 187 {16, 12, 0, 191}, 188 {16, 11, 192, 367}, 189 {16, 10, 368, 527}, 190 {16, 9, 528, 671}, 191 {16, 8, 672, 799} 192 }; 193 194 /* Drive format codes/indexes */ 195 enum { 196 IWM_400K_GCR = 0, 197 IWM_800K_GCR = 1, 198 IWM_720K_MFM = 2, 199 IWM_1440K_MFM = 3 200 }; 201 202 203 /** 204 ** Autoconfiguration code 205 **/ 206 207 /* 208 * Autoconfig data structures 209 * 210 * These data structures (see <sys/device.h>) are referenced in 211 * compile/$KERNEL/ioconf.c, which is generated by config(8). 212 * Their names are formed like {device}_{ca,cd}. 213 * 214 * {device}_ca 215 * is used for dynamically allocating driver data, probing and 216 * attaching a device; 217 * 218 * {device}_cd 219 * references all found devices of a type. 220 */ 221 #ifndef _LKM 222 223 extern struct cfdriver iwm_cd; 224 extern struct cfdriver fd_cd; 225 226 #endif /* defined _LKM */ 227 228 /* IWM floppy disk controller */ 229 CFATTACH_DECL(iwm, sizeof(iwm_softc_t), 230 iwm_match, iwm_attach, NULL, NULL); 231 232 /* Attached floppy disk drives */ 233 CFATTACH_DECL(fd, sizeof(fd_softc_t), 234 fd_match, fd_attach, NULL, NULL); 235 236 dev_type_open(fdopen); 237 dev_type_close(fdclose); 238 dev_type_read(fdread); 239 dev_type_write(fdwrite); 240 dev_type_ioctl(fdioctl); 241 dev_type_strategy(fdstrategy); 242 243 const struct bdevsw fd_bdevsw = { 244 fdopen, fdclose, fdstrategy, fdioctl, nodump, nosize, D_DISK 245 }; 246 247 const struct cdevsw fd_cdevsw = { 248 fdopen, fdclose, fdread, fdwrite, fdioctl, 249 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 250 }; 251 252 /* disk(9) framework device switch */ 253 struct dkdriver fd_dkDriver = { 254 fdstrategy 255 }; 256 257 /*** Configure the IWM controller ***/ 258 259 /* 260 * iwm_match 261 * 262 * Is the IWM chip present? Here, *auxp is a ptr to struct confargs 263 * (see <mac68k/mac68k/autoconf.h>), which does not hold any information 264 * to match against. After all, that's what the obio concept is 265 * about: Onboard components that are present depending (only) 266 * on machine type. 267 */ 268 int 269 iwm_match(parent, match, auxp) 270 struct device *parent; 271 struct cfdata *match; 272 void *auxp; 273 { 274 int matched; 275 #ifdef _LKM 276 int iwmErr; 277 #endif 278 extern u_long IOBase; /* from mac68k/machdep.c */ 279 extern u_long IWMBase; 280 281 if (0 == map_iwm_base(IOBase)) { 282 /* 283 * Unknown machine HW: 284 * The SWIM II/III chips that are present in post-Q700 285 * '040 Macs have dropped the IWM register structure. 286 * We know next to nothing about the SWIM. 287 */ 288 matched = 0; 289 if (TRACE_CONFIG) 290 printf("IWM or SWIM not found: Unknown location (SWIM II?).\n"); 291 } else { 292 matched = 1; 293 if (TRACE_CONFIG) { 294 printf("iwm: IWMBase mapped to 0x%lx in VM.\n", 295 IWMBase); 296 } 297 #ifdef _LKM 298 iwmErr = iwmInit(); 299 if (TRACE_CONFIG) 300 printf("initIWM() says %d.\n", iwmErr); 301 matched = (iwmErr == 0) ? 1 : 0; 302 #endif 303 } 304 return matched; 305 } 306 307 308 /* 309 * iwm_attach 310 * 311 * The IWM is present, initialize it. Then look up the connected drives 312 * and attach them. 313 */ 314 void 315 iwm_attach(parent, self, auxp) 316 struct device *parent; 317 struct device *self; 318 void *auxp; 319 { 320 int iwmErr; 321 iwm_softc_t *iwm; 322 iwmAttachArgs_t ia; 323 324 printf(": Apple GCR floppy disk controller\n"); 325 iwm = (iwm_softc_t *)self; 326 327 iwmErr = iwmInit(); 328 if (TRACE_CONFIG) 329 printf("initIWM() says %d.\n", iwmErr); 330 331 if (0 == iwmErr) { 332 /* Set up the IWM softc */ 333 iwm->maxRetries = 10; 334 335 /* Look for attached drives */ 336 for (ia.unit = 0; ia.unit < IWM_MAX_DRIVE; ia.unit++) { 337 iwm->fd[ia.unit] = NULL; 338 ia.driveType = getFDType(ia.unit); 339 if (NULL != ia.driveType) 340 config_found_sm(self, (void *)&ia, 341 fd_print, NULL); 342 } 343 if (TRACE_CONFIG) 344 printf("iwm: Initialization completed.\n"); 345 } else { 346 printf("iwm: Chip revision not supported (%d)\n", iwmErr); 347 } 348 } 349 350 351 /* 352 * iwm_print -- print device configuration. 353 * 354 * If the device is not configured 'controller' it is NULL and 355 * we print a message in the *Attach routine; the return value 356 * of *Print() is ignored. 357 */ 358 int 359 iwm_print(auxp, controller) 360 void *auxp; 361 const char *controller; 362 { 363 return UNCONF; 364 } 365 366 367 /* 368 * map_iwm_base 369 * 370 * Map physical IO address of IWM to VM address 371 */ 372 static int 373 map_iwm_base(base) 374 vm_offset_t base; 375 { 376 int known; 377 extern u_long IWMBase; 378 379 switch (current_mac_model->class) { 380 case MACH_CLASSQ: 381 case MACH_CLASSQ2: 382 case MACH_CLASSP580: 383 IWMBase = base + 0x1E000; 384 known = 1; 385 break; 386 case MACH_CLASSII: 387 case MACH_CLASSPB: 388 case MACH_CLASSDUO: 389 case MACH_CLASSIIci: 390 case MACH_CLASSIIsi: 391 case MACH_CLASSIIvx: 392 case MACH_CLASSLC: 393 IWMBase = base + 0x16000; 394 known = 1; 395 break; 396 case MACH_CLASSIIfx: 397 case MACH_CLASSAV: 398 default: 399 /* 400 * Neither IIfx/Q9[05]0 style IOP controllers nor 401 * Q[68]40AV DMA based controllers are supported. 402 */ 403 if (TRACE_CONFIG) 404 printf("Unknown floppy controller chip.\n"); 405 IWMBase = 0L; 406 known = 0; 407 break; 408 } 409 return known; 410 } 411 412 413 /*** Configure Sony disk drive(s) ***/ 414 415 /* 416 * fd_match 417 */ 418 int 419 fd_match(parent, match, auxp) 420 struct device *parent; 421 struct cfdata *match; 422 void *auxp; 423 { 424 int matched, cfUnit; 425 struct cfdata *cfp; 426 iwmAttachArgs_t *fdParams; 427 428 cfp = match; 429 fdParams = (iwmAttachArgs_t *)auxp; 430 cfUnit = cfp->cf_loc[0]; 431 matched = (cfUnit == fdParams->unit || cfUnit == -1) ? 1 : 0; 432 if (TRACE_CONFIG) { 433 printf("fdMatch() drive %d ? cfUnit = %d\n", 434 fdParams->unit, cfp->cf_loc[0]); 435 } 436 return matched; 437 } 438 439 440 /* 441 * fd_attach 442 * 443 * We have checked that the IWM is fine and the drive is present, 444 * so we can attach it. 445 */ 446 void 447 fd_attach(parent, self, auxp) 448 struct device *parent; 449 struct device *self; 450 void *auxp; 451 { 452 iwm_softc_t *iwm; 453 fd_softc_t *fd; 454 iwmAttachArgs_t *ia; 455 int driveInfo; 456 457 iwm = (iwm_softc_t *)parent; 458 fd = (fd_softc_t *)self; 459 ia = (iwmAttachArgs_t *)auxp; 460 461 driveInfo = iwmCheckDrive(ia->unit); 462 463 fd->currentType = ia->driveType; 464 fd->unit = ia->unit; 465 fd->defaultType = &fdTypes[IWM_800K_GCR]; 466 fd->stepDirection = 0; 467 468 iwm->fd[ia->unit] = fd; /* iwm has ptr to this drive */ 469 iwm->drives++; 470 471 bufq_alloc(&fd->bufQueue, BUFQ_DISKSORT|BUFQ_SORT_CYLINDER); 472 callout_init(&fd->motor_ch); 473 474 printf(" drive %d: ", fd->unit); 475 476 if (IWM_NO_DISK & driveInfo) { 477 printf("(drive empty)\n"); 478 } else 479 if (!(IWM_DD_DISK & driveInfo)) { 480 printf("(HD disk -- not supported)\n"); 481 iwmDiskEject(fd->unit); /* XXX */ 482 } else { 483 printf("%s %d cyl, %d head(s)\n", 484 fd->currentType->description, 485 fd->currentType->tracks, 486 fd->currentType->heads); 487 } 488 if (TRACE_CONFIG) { 489 int reg, flags, spl; 490 491 /* List contents of drive status registers */ 492 spl = spl6(); 493 for (reg = 0; reg < 0x10; reg++) { 494 flags = iwmQueryDrvFlag(fd->unit, reg); 495 printf("iwm: Drive register 0x%x = 0x%x\n", reg, flags); 496 } 497 splx(spl); 498 } 499 fd->diskInfo.dk_name = fd->devInfo.dv_xname; 500 fd->diskInfo.dk_driver = &fd_dkDriver; 501 disk_attach(&fd->diskInfo); 502 } 503 504 505 /* 506 * fdPrint -- print device configuration. 507 * 508 * If the device is not configured 'controller' refers to a name string 509 * we print here. 510 * Else it is NULL and we print a message in the *Attach routine; the 511 * return value of *Print() is ignored. 512 */ 513 int 514 fd_print(auxp, controller) 515 void *auxp; 516 const char *controller; 517 { 518 iwmAttachArgs_t *ia; 519 520 ia = (iwmAttachArgs_t *)auxp; 521 if (NULL != controller) 522 aprint_normal("fd%d at %s", ia->unit, controller); 523 return UNCONF; 524 } 525 526 527 #ifdef _LKM 528 529 static iwm_softc_t *iwm; 530 531 /* 532 * fd_mod_init 533 * 534 * Any initializations necessary after loading the module happen here. 535 */ 536 int 537 fd_mod_init(void) 538 { 539 int err; 540 541 iwm = (iwm_softc_t *)malloc(sizeof(iwm_softc_t), M_DEVBUF, M_WAITOK); 542 543 err = (1 == iwm_match(NULL, NULL, NULL)) ? 0 : EIO; 544 if (!err) { 545 memset(iwm, 0, sizeof(iwm_softc_t)); 546 iwm->maxRetries = 10; 547 err = (0 == probe_fd()) ? 0 : EIO; 548 } 549 return err; 550 } 551 552 553 /* 554 * fd_mod_free 555 * 556 * Necessary clean-up before unloading the module. 557 */ 558 void 559 fd_mod_free(void) 560 { 561 int unit, spl; 562 563 spl = splbio(); 564 /* Release any allocated memory */ 565 for (unit = 0; unit < IWM_MAX_DRIVE; unit++) 566 if (iwm->fd[unit] != NULL) { 567 /* 568 * Let's hope there is only one task per drive, 569 * see callout(9). 570 */ 571 callout_stop(&iwm->fd[unit]->motor_ch); 572 disk_detach(&iwm->fd[unit]->diskInfo); 573 free(iwm->fd[unit], M_DEVBUF); 574 iwm->fd[unit] = NULL; 575 } 576 free(iwm, M_DEVBUF); 577 splx(spl); 578 } 579 580 581 /* 582 * probe_fd 583 * 584 * See if there are any drives out there and configure them. 585 * If we find a drive we allocate a softc structure for it and 586 * insert its address into the iwm_softc. 587 * 588 * XXX Merge the remainder of probeFD() with the autoconfig framework. 589 */ 590 static int 591 probe_fd(void) 592 { 593 fd_softc_t *fd; 594 iwmAttachArgs_t ia; 595 int err, unit; 596 597 err = 0; 598 for (ia.unit = 0; ia.unit < IWM_MAX_DRIVE; ia.unit++) { 599 ia.driveType = getFDType(ia.unit); 600 if (NULL == ia.driveType) { 601 iwm->fd[ia.unit] = NULL; 602 continue; 603 } 604 fd = (fd_softc_t *)malloc(sizeof(fd_softc_t), 605 M_DEVBUF, M_WAITOK); 606 if (fd == NULL) { 607 err = ENOMEM; 608 break; 609 } else { 610 memset(fd, 0, sizeof(fd_softc_t)); 611 612 /* This is usually set by the autoconfig framework */ 613 sprintf(fd->devInfo.dv_xname, "fd%d%c", ia.unit, 'a'); 614 fd_attach((struct device *)iwm, (struct device *)fd, 615 &ia); 616 } 617 } 618 if (err) { 619 /* Release any allocated memory */ 620 for (unit = 0; unit < IWM_MAX_DRIVE; unit++) 621 if (iwm->fd[unit] != NULL) { 622 free(iwm->fd[unit], M_DEVBUF); 623 iwm->fd[unit] = NULL; 624 } 625 } 626 return err; 627 } 628 629 #endif /* defined _LKM */ 630 631 632 /** 633 ** Implementation section of driver interface 634 ** 635 ** The prototypes for these functions are set up automagically 636 ** by macros in mac68k/conf.c. Their names are generated from {fd} 637 ** and {open,close,strategy,dump,size,read,write}. The driver entry 638 ** points are then plugged into bdevsw[] and cdevsw[]. 639 **/ 640 641 642 /* 643 * fdopen 644 * 645 * Open a floppy disk device. 646 */ 647 int 648 fdopen(dev, flags, devType, proc) 649 dev_t dev; 650 int flags; 651 int devType; 652 struct proc *proc; 653 { 654 fd_softc_t *fd; 655 fdInfo_t *info; 656 int partitionMask; 657 int fdType, fdUnit; 658 int ierr, err; 659 #ifndef _LKM 660 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 661 #endif 662 info = NULL; /* XXX shut up egcs */ 663 664 /* 665 * See <device.h> for struct cfdriver, <disklabel.h> for 666 * DISKUNIT() and <atari/atari/device.h> for getsoftc(). 667 */ 668 fdType = minor(dev) % MAXPARTITIONS; 669 fdUnit = minor(dev) / MAXPARTITIONS; 670 if (TRACE_OPEN) 671 printf("iwm: Open drive %d", fdUnit); 672 673 /* Check if device # is valid */ 674 err = (iwm->drives < fdUnit) ? ENXIO : 0; 675 if (!err) { 676 (void)iwmSelectDrive(fdUnit); 677 if (TRACE_OPEN) 678 printf(".\n Get softc"); 679 680 /* Get fd state */ 681 fd = iwm->fd[fdUnit]; 682 err = (NULL == fd) ? ENXIO : 0; 683 } 684 if (!err) { 685 if (fd->state & IWM_FD_IS_OPEN) { 686 /* 687 * Allow multiple open calls only if for identical 688 * floppy format. 689 */ 690 if (TRACE_OPEN) 691 printf(".\n Drive already opened!\n"); 692 err = (fd->partition == fdType) ? 0 : ENXIO; 693 } else { 694 if (TRACE_OPEN) 695 printf(".\n Get format info"); 696 697 /* Get format type */ 698 info = fdDeviceToType(fd, dev); 699 if (NULL == info) { 700 err = ENXIO; 701 if (TRACE_OPEN) 702 printf(".\n No such drive.\n"); 703 } 704 } 705 } 706 if (!err && !(fd->state & IWM_FD_IS_OPEN)) { 707 if (TRACE_OPEN) 708 printf(".\n Set diskInfo flags.\n"); 709 710 fd->writeLabel = 0; /* XXX currently unused */ 711 fd->partition = fdType; 712 fd->currentType = info; 713 fd->drvFlags = iwmCheckDrive(fd->unit); 714 715 if (fd->drvFlags & IWM_NO_DISK) { 716 err = EIO; 717 #ifdef DIAGNOSTIC 718 printf(" Drive %d is empty.\n", fd->unit); 719 #endif 720 } else { 721 if (!(fd->drvFlags & IWM_WRITABLE) && (flags & FWRITE)) { 722 723 err = EPERM; 724 #ifdef DIAGNOSTIC 725 printf(" Disk is write protected.\n"); 726 #endif 727 } else { 728 if (!(fd->drvFlags & IWM_DD_DISK)) { 729 err = ENXIO; 730 #ifdef DIAGNOSTIC 731 printf(" HD format not supported.\n"); 732 #endif 733 (void)iwmDiskEject(fd->unit); 734 } else { 735 /* We're open now! */ 736 fd->state |= IWM_FD_IS_OPEN; 737 err = initCylinderCache(fd); 738 } 739 } 740 } 741 } 742 if (!err) { 743 /* 744 * Later, we might not want to recalibrate the drive when it 745 * is already open. For now, it doesn't hurt. 746 */ 747 if (TRACE_OPEN) 748 printf(" Seek track 00 says"); 749 750 memset(&fd->pos, 0, sizeof(diskPosition_t)); 751 ierr = seek(fd, IWM_SEEK_RECAL); 752 if (TRACE_OPEN) 753 printf(" %d.\n", ierr); 754 err = (0 == ierr) ? 0 : EIO; 755 } 756 if (!err) { 757 /* 758 * Update disklabel if we are not yet open. 759 * (We shouldn't be: We are synchronous.) 760 */ 761 if (fd->diskInfo.dk_openmask == 0) 762 fdGetDiskLabel(fd, dev); 763 764 partitionMask = (1 << fdType); 765 766 switch (devType) { 767 case S_IFCHR: 768 fd->diskInfo.dk_copenmask |= partitionMask; 769 break; 770 771 case S_IFBLK: 772 fd->diskInfo.dk_bopenmask |= partitionMask; 773 break; 774 } 775 fd->diskInfo.dk_openmask = 776 fd->diskInfo.dk_copenmask | fd->diskInfo.dk_bopenmask; 777 } 778 if (TRACE_OPEN) 779 printf("iwm: fdopen() says %d.\n", err); 780 return err; 781 } 782 783 784 /* 785 * fdclose 786 */ 787 int 788 fdclose(dev, flags, devType, proc) 789 dev_t dev; 790 int flags; 791 int devType; 792 struct proc *proc; 793 { 794 fd_softc_t *fd; 795 int partitionMask, fdUnit, fdType; 796 #ifndef _LKM 797 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 798 #endif 799 800 if (TRACE_CLOSE) 801 printf("iwm: Closing driver."); 802 fdUnit = minor(dev) / MAXPARTITIONS; 803 fdType = minor(dev) % MAXPARTITIONS; 804 fd = iwm->fd[fdUnit]; 805 /* release cylinder cache memory */ 806 if (fd->cbuf != NULL) 807 free(fd->cbuf, M_DEVBUF); 808 809 partitionMask = (1 << fdType); 810 811 /* Set state flag. */ 812 fd->state &= ~IWM_FD_IS_OPEN; 813 814 switch (devType) { 815 case S_IFCHR: 816 fd->diskInfo.dk_copenmask &= ~partitionMask; 817 break; 818 819 case S_IFBLK: 820 fd->diskInfo.dk_bopenmask &= ~partitionMask; 821 break; 822 } 823 fd->diskInfo.dk_openmask = 824 fd->diskInfo.dk_copenmask | fd->diskInfo.dk_bopenmask; 825 return 0; 826 } 827 828 829 /* 830 * fdioctl 831 * 832 * We deal with all the disk-specific ioctls in <sys/dkio.h> here even if 833 * we do not support them. 834 */ 835 int 836 fdioctl(dev, cmd, data, flags, proc) 837 dev_t dev; 838 u_long cmd; 839 caddr_t data; 840 int flags; 841 struct proc *proc; 842 { 843 int result, fdUnit, fdType; 844 fd_softc_t *fd; 845 #ifndef _LKM 846 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 847 #endif 848 849 if (TRACE_IOCTL) 850 printf("iwm: Execute ioctl... "); 851 852 /* Check if device # is valid and get its softc */ 853 fdUnit = minor(dev) / MAXPARTITIONS; 854 fdType = minor(dev) % MAXPARTITIONS; 855 if (fdUnit >= iwm->drives) { 856 if (TRACE_IOCTL) { 857 printf("iwm: Wanted device no (%d) is >= %d.\n", 858 fdUnit, iwm->drives); 859 } 860 return ENXIO; 861 } 862 fd = iwm->fd[fdUnit]; 863 result = 0; 864 865 switch (cmd) { 866 case DIOCGDINFO: 867 if (TRACE_IOCTL) 868 printf(" DIOCGDINFO: Get in-core disklabel.\n"); 869 *(struct disklabel *) data = *(fd->diskInfo.dk_label); 870 result = 0; 871 break; 872 873 case DIOCSDINFO: 874 if (TRACE_IOCTL) 875 printf(" DIOCSDINFO: Set in-core disklabel.\n"); 876 result = ((flags & FWRITE) == 0) ? EBADF : 0; 877 if (result == 0) 878 result = setdisklabel(fd->diskInfo.dk_label, 879 (struct disklabel *)data, 0, 880 fd->diskInfo.dk_cpulabel); 881 break; 882 883 case DIOCWDINFO: 884 if (TRACE_IOCTL) 885 printf(" DIOCWDINFO: Set in-core disklabel " 886 "& update disk.\n"); 887 result = ((flags & FWRITE) == 0) ? EBADF : 0; 888 889 if (result == 0) 890 result = setdisklabel(fd->diskInfo.dk_label, 891 (struct disklabel *)data, 0, 892 fd->diskInfo.dk_cpulabel); 893 if (result == 0) 894 result = writedisklabel(dev, fdstrategy, 895 fd->diskInfo.dk_label, 896 fd->diskInfo.dk_cpulabel); 897 break; 898 899 case DIOCGPART: 900 if (TRACE_IOCTL) 901 printf(" DIOCGPART: Get disklabel & partition table.\n"); 902 ((struct partinfo *)data)->disklab = fd->diskInfo.dk_label; 903 ((struct partinfo *)data)->part = 904 &fd->diskInfo.dk_label->d_partitions[fdType]; 905 result = 0; 906 break; 907 908 case DIOCRFORMAT: 909 case DIOCWFORMAT: 910 if (TRACE_IOCTL) 911 printf(" DIOC{R,W}FORMAT: No formatter support (yet?).\n"); 912 result = EINVAL; 913 break; 914 915 case DIOCSSTEP: 916 if (TRACE_IOCTL) 917 printf(" DIOCSSTEP: IWM does step handshake.\n"); 918 result = EINVAL; 919 break; 920 921 case DIOCSRETRIES: 922 if (TRACE_IOCTL) 923 printf(" DIOCSRETRIES: Set max. # of retries.\n"); 924 if (*(int *)data < 0) 925 result = EINVAL; 926 else { 927 iwm->maxRetries = *(int *)data; 928 result = 0; 929 } 930 break; 931 932 case DIOCWLABEL: 933 if (TRACE_IOCTL) 934 printf(" DIOCWLABEL: Set write access to disklabel.\n"); 935 result = ((flags & FWRITE) == 0) ? EBADF : 0; 936 937 if (result == 0) 938 fd->writeLabel = *(int *)data; 939 break; 940 941 case DIOCSBAD: 942 if (TRACE_IOCTL) 943 printf(" DIOCSBAD: No bad144-style handling.\n"); 944 result = EINVAL; 945 break; 946 947 case ODIOCEJECT: 948 case DIOCEJECT: 949 /* XXX Eject disk only when unlocked */ 950 if (TRACE_IOCTL) 951 printf(" DIOCEJECT: Eject disk from unit %d.\n", 952 fd->unit); 953 result = iwmDiskEject(fd->unit); 954 break; 955 956 case DIOCLOCK: 957 /* XXX Use lock to prevent ejectimg a mounted disk */ 958 if (TRACE_IOCTL) 959 printf(" DIOCLOCK: No need to (un)lock Sony drive.\n"); 960 result = 0; 961 break; 962 963 default: 964 if (TRACE_IOCTL) 965 printf(" Not a disk related ioctl!\n"); 966 result = ENOTTY; 967 break; 968 } 969 return result; 970 } 971 972 973 /* 974 * fdread 975 */ 976 int 977 fdread(dev, uio, flags) 978 dev_t dev; 979 struct uio *uio; 980 int flags; 981 { 982 return physio(fdstrategy, NULL, dev, B_READ, minphys, uio); 983 } 984 985 986 /* 987 * fdwrite 988 */ 989 int 990 fdwrite(dev, uio, flags) 991 dev_t dev; 992 struct uio *uio; 993 int flags; 994 { 995 return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio); 996 } 997 998 999 /* 1000 * fdstrategy 1001 * 1002 * Entry point for read and write requests. The strategy routine usually 1003 * queues io requests and kicks off the next transfer if the device is idle; 1004 * but we get no interrupts from the IWM and have to do synchronous 1005 * transfers - no queue. 1006 */ 1007 void 1008 fdstrategy(bp) 1009 struct buf *bp; 1010 { 1011 int fdUnit, err, done, spl; 1012 int sectSize, transferSize; 1013 diskPosition_t physDiskLoc; 1014 fd_softc_t *fd; 1015 #ifndef _LKM 1016 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1017 #endif 1018 1019 err = 0; 1020 done = 0; 1021 1022 fdUnit = minor(bp->b_dev) / MAXPARTITIONS; 1023 if (TRACE_STRAT) { 1024 printf("iwm: fdstrategy()...\n"); 1025 printf(" struct buf is at %p\n", bp); 1026 printf(" Allocated buffer size (b_bufsize): 0x0%lx\n", 1027 bp->b_bufsize); 1028 printf(" Base address of buffer (b_data): %p\n", 1029 bp->b_data); 1030 printf(" Bytes to be transferred (b_bcount): 0x0%lx\n", 1031 bp->b_bcount); 1032 printf(" Remaining I/O (b_resid): 0x0%lx\n", 1033 bp->b_resid); 1034 } 1035 /* Check for valid fd unit, controller and io request */ 1036 1037 if (fdUnit >= iwm->drives) { 1038 if (TRACE_STRAT) 1039 printf(" No such unit (%d)\n", fdUnit); 1040 err = EINVAL; 1041 } 1042 if (!err) { 1043 fd = iwm->fd[fdUnit]; 1044 err = (NULL == fd) ? EINVAL : 0; 1045 } 1046 if (!err) { 1047 sectSize = fd->currentType->sectorSize; 1048 if (bp->b_blkno < 0 1049 || (bp->b_bcount % sectSize) != 0) { 1050 if (TRACE_STRAT) 1051 printf(" Illegal transfer size: " 1052 "block %lld, %ld bytes\n", 1053 (long long) bp->b_blkno, bp->b_bcount); 1054 err = EINVAL; 1055 } 1056 } 1057 if (!err) { 1058 /* Null transfer: Return, nothing to do. */ 1059 if (0 == bp->b_bcount) { 1060 if (TRACE_STRAT) 1061 printf(" Zero transfer length.\n"); 1062 done = 1; 1063 } 1064 } 1065 if (!err && !done) { 1066 /* What to do if we touch the boundaries of the disk? */ 1067 transferSize = (bp->b_bcount + (sectSize - 1)) / sectSize; 1068 if (bp->b_blkno + transferSize > fd->currentType->secPerDisk) { 1069 if (TRACE_STRAT) { 1070 printf("iwm: Transfer beyond end of disk!\n" \ 1071 " (Starting block %lld, # of blocks %d," \ 1072 " last disk block %d).\n", 1073 (long long) bp->b_blkno, transferSize, 1074 fd->currentType->secPerDisk); 1075 } 1076 /* Return EOF if we are exactly at the end of the 1077 * disk, EINVAL if we try to reach past the end; else 1078 * truncate the request. */ 1079 transferSize = fd->currentType->secPerDisk - 1080 bp->b_blkno; 1081 if (0 == transferSize) { 1082 bp->b_resid = bp->b_bcount; 1083 done = 1; 1084 } else 1085 if (0 > transferSize) 1086 err = EINVAL; 1087 else 1088 bp->b_bcount = transferSize << DEV_BSHIFT; 1089 } 1090 } 1091 if (!err && !done) { 1092 /* 1093 * Calculate cylinder # for disksort(). 1094 * 1095 * XXX Shouldn't we use the (fake) logical cyl no here? 1096 */ 1097 remap_geometry(bp->b_blkno, fd->currentType->heads, 1098 &physDiskLoc); 1099 bp->b_rawblkno = bp->b_blkno; 1100 bp->b_cylinder = physDiskLoc.track; 1101 1102 if (TRACE_STRAT) { 1103 printf(" This job starts at b_blkno %lld; ", 1104 (long long) bp->b_blkno); 1105 printf("it gets sorted for cylinder # %ld.\n", 1106 bp->b_cylinder); 1107 } 1108 spl = splbio(); 1109 callout_stop(&fd->motor_ch); 1110 BUFQ_PUT(&fd->bufQueue, bp); 1111 if (fd->sc_active == 0) 1112 fdstart(fd); 1113 splx(spl); 1114 } 1115 /* Clean up, if necessary */ 1116 else { 1117 if (TRACE_STRAT) 1118 printf(" fdstrategy() finished early, err = %d.\n", 1119 err); 1120 if (err) { 1121 bp->b_error = err; 1122 bp->b_flags |= B_ERROR; 1123 } 1124 bp->b_resid = bp->b_bcount; 1125 biodone(bp); 1126 } 1127 /* Comment on results */ 1128 if (TRACE_STRAT) { 1129 printf("iwm: fdstrategy() done.\n"); 1130 printf(" We have b_resid = %ld bytes left, " \ 1131 "b_error is %d;\n", bp->b_resid, bp->b_error); 1132 printf(" b_flags are 0x0%lx.\n", bp->b_flags); 1133 } 1134 } 1135 1136 1137 1138 /* ======================================================================== */ 1139 1140 1141 /* 1142 * fdstart 1143 * 1144 * we are called from the strategy() routine to perform a data transfer. 1145 * 1146 * The disk(9) framework demands we run at splbio(); our caller 1147 * takes care of that. 1148 * 1149 * Wish we had pascalish local functions here... 1150 */ 1151 1152 /* fdstart FSM states */ 1153 enum { 1154 state_Init = 0, 1155 state_Seek, 1156 state_Read, 1157 state_Write, 1158 state_Flush, 1159 state_IOFinish, 1160 state_IOErr, 1161 state_Fault, 1162 state_Exit, 1163 state_Done 1164 }; 1165 1166 static void 1167 fdstart(fd) 1168 fd_softc_t *fd; 1169 { 1170 int st; 1171 1172 static char *stateDesc[] = { 1173 "Init", 1174 "Seek", 1175 "Read", 1176 "Write", 1177 "Flush", 1178 "IOFinish", 1179 "IOErr", 1180 "Fault", 1181 "Exit", 1182 "Done" 1183 }; 1184 int (*state[])(fd_softc_t *fd) = { 1185 fdstart_Init, 1186 fdstart_Seek, 1187 fdstart_Read, 1188 fdstart_Write, 1189 fdstart_Flush, 1190 fdstart_IOFinish, 1191 fdstart_IOErr, 1192 fdstart_Fault, 1193 fdstart_Exit 1194 }; 1195 1196 st = state_Init; 1197 do { 1198 if (TRACE_STRAT) 1199 printf(" fdstart state %d [%s] ", 1200 st, stateDesc[st]); 1201 1202 st = (*state[st])(fd); 1203 1204 if (TRACE_STRAT) 1205 printf(".\n"); 1206 } while (st != state_Done); 1207 } 1208 1209 1210 /* 1211 * fdstart_Init 1212 * 1213 * Set up things 1214 */ 1215 static int 1216 fdstart_Init(fd) 1217 fd_softc_t *fd; 1218 { 1219 struct buf *bp; 1220 1221 /* 1222 * Get the first entry from the queue. This is the buf we gave to 1223 * fdstrategy(); disksort() put it into our softc. 1224 */ 1225 bp = BUFQ_PEEK(&fd->bufQueue); 1226 if (NULL == bp) { 1227 if (TRACE_STRAT) 1228 printf("Queue empty: Nothing to do"); 1229 return state_Done; 1230 } 1231 fd->ioDirection = bp->b_flags & B_READ; 1232 1233 disk_busy(&fd->diskInfo); 1234 if (!(fd->state & IWM_FD_MOTOR_ON)) { 1235 iwmMotor(fd->unit, 1); 1236 fd->state |= IWM_FD_MOTOR_ON; 1237 } 1238 fd->current_buffer = bp->b_data; 1239 1240 /* XXX - assumes blocks of 512 bytes */ 1241 fd->startBlk = bp->b_blkno; 1242 1243 fd->iwmErr = 0; 1244 fd->ioRetries = 0; /* XXX */ 1245 fd->seekRetries = 0; 1246 fd->bytesDone = 0; 1247 fd->bytesLeft = bp->b_bcount; 1248 return state_Seek; 1249 } 1250 1251 1252 /* 1253 * fdstart_Seek 1254 */ 1255 static int 1256 fdstart_Seek(fd) 1257 fd_softc_t *fd; 1258 { 1259 int state; 1260 1261 /* Calculate the side/track/sector our block is at. */ 1262 if (TRACE_STRAT) 1263 printf(" Remap block %lld ", (long long) fd->startBlk); 1264 remap_geometry(fd->startBlk, 1265 fd->currentType->heads, &fd->pos); 1266 if (TRACE_STRAT) 1267 printf("to c%d_h%d_s%d ", fd->pos.track, 1268 fd->pos.side, fd->pos.sector); 1269 1270 if (fd->cachedSide != fd->pos.side) { 1271 if (TRACE_STRAT) 1272 printf(" (invalidate cache) "); 1273 invalidateCylinderCache(fd); 1274 fd->cachedSide = fd->pos.side; 1275 } 1276 1277 /* 1278 * If necessary, seek to wanted track. Note that 1279 * seek() performs any necessary retries. 1280 */ 1281 if (fd->pos.track != fd->pos.oldTrack && 1282 0 != (fd->iwmErr = seek(fd, IWM_SEEK_VANILLA))) { 1283 state = state_Fault; 1284 } else { 1285 state = (fd->ioDirection == IWM_WRITE) 1286 ? state_Write : state_Read; 1287 } 1288 return state; 1289 } 1290 1291 1292 /* 1293 * fdstart_Read 1294 * 1295 * Transfer a sector from disk. Get it from the track cache, if available; 1296 * otherwise, while we are at it, store in the cache all the sectors we find 1297 * on the way. 1298 * 1299 * Track buffering reads: 1300 * o Look if the sector is already cached. 1301 * o Else, read sectors into track cache until we meet the header of 1302 * the sector we want. 1303 * o Read that sector directly to fs buffer and return. 1304 */ 1305 static int 1306 fdstart_Read(fd) 1307 fd_softc_t *fd; 1308 { 1309 int i; 1310 diskPosition_t *pos; 1311 sectorHdr_t *shdr; 1312 #ifndef _LKM 1313 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1314 #endif 1315 1316 /* Initialize retry counters */ 1317 fd->seekRetries = 0; 1318 fd->sectRetries = 0; 1319 pos = &fd->pos; 1320 shdr = &fd->sHdr; 1321 1322 if (TRACE_STRAT) 1323 printf("<%s c%d_h%d_s%d> ", 1324 fd->ioDirection ? "Read" : "Write", 1325 pos->track, pos->side, pos->sector); 1326 1327 /* Sector already cached? */ 1328 i = pos->sector; 1329 if (fd->r_slots[i].valid) { 1330 if (TRACE_STRAT) 1331 printf("(cached)"); 1332 memcpy(fd->current_buffer, fd->r_slots[i].secbuf, 1333 fd->currentType->sectorSize); 1334 return state_IOFinish; 1335 } 1336 1337 /* Get sector from disk */ 1338 shdr->side = pos->side; 1339 shdr->sector = pos->sector; 1340 shdr->track = pos->track; 1341 1342 (void)iwmSelectSide(pos->side); 1343 fd->iwmErr = iwmReadSector(&fd->sHdr, fd->r_slots, 1344 fd->current_buffer); 1345 1346 /* Check possible error conditions */ 1347 if (TRACE_STRAT) 1348 printf("c%d_h%d_s%d_err(%d)_sr%d ", 1349 shdr->track, shdr->side >> 3, 1350 shdr->sector, fd->iwmErr, fd->sectRetries); 1351 1352 /* IWM IO error? */ 1353 if (fd->iwmErr != 0) 1354 return state_IOErr; 1355 1356 /* Bad seek? Retry */ 1357 if (shdr->track != pos->track) { 1358 if (TRACE_STRAT) { 1359 printf("Wanted track %d, got %d, %d seek retries.\n", 1360 pos->track, shdr->track, fd->seekRetries); 1361 } 1362 if (iwm->maxRetries > fd->seekRetries++) { 1363 fd->iwmErr = seek(fd, IWM_SEEK_RECAL); 1364 if (TRACE_STRAT) { 1365 printf("[%d]", fd->seekRetries); 1366 (void)checkTrack(&fd->pos, 1); 1367 } 1368 } else 1369 fd->iwmErr = seekErr; 1370 return (0 == fd->iwmErr) ? state_Read : state_Fault; 1371 } 1372 1373 /* Sector not found? */ 1374 if (shdr->sector != pos->sector) { 1375 if (TRACE_STRAT) 1376 printf("c%d_h%d_s%d sect not found, %d retries ", 1377 shdr->track, shdr->side >> 3, 1378 shdr->sector, fd->sectRetries); 1379 fd->iwmErr = noAdrMkErr; 1380 return state_Fault; 1381 } 1382 1383 /* Success */ 1384 return state_IOFinish; 1385 } 1386 1387 1388 /* 1389 * fdstart_Write 1390 * 1391 * Insert a sector into a write buffer slot and mark the slot dirty. 1392 */ 1393 static int 1394 fdstart_Write(fd) 1395 fd_softc_t *fd; 1396 { 1397 int i; 1398 1399 /* XXX let's see... */ 1400 fd->sHdr.side = fd->pos.side; 1401 fd->sHdr.sector = fd->pos.sector; 1402 fd->sHdr.track = fd->pos.track; 1403 1404 i = fd->pos.sector; 1405 fd->w_slots[i].secbuf = fd->current_buffer; 1406 fd->w_slots[i].valid = 1; /* "valid" is a dirty buffer here */ 1407 1408 if (TRACE_STRAT) 1409 printf("<%s c%d_h%d_s%d> (cached) ", 1410 fd->ioDirection ? "Read" : "Write", 1411 fd->pos.track, fd->pos.side, fd->pos.sector); 1412 return state_IOFinish; 1413 } 1414 1415 1416 1417 /* 1418 * fdstart_Flush 1419 * 1420 * Flush dirty buffers in the track cache to disk. 1421 */ 1422 static int 1423 fdstart_Flush(fd) 1424 fd_softc_t *fd; 1425 { 1426 int state; 1427 int i, dcnt; 1428 diskPosition_t *pos; 1429 sectorHdr_t *shdr; 1430 #ifndef _LKM 1431 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1432 #endif 1433 dcnt = 0; 1434 pos = &fd->pos; 1435 shdr = &fd->sHdr; 1436 1437 if (TRACE_STRAT) { 1438 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) 1439 if (fd->w_slots[i].valid) { 1440 printf("|%d", i); 1441 dcnt++; 1442 } 1443 printf("|\n"); 1444 1445 printf(" <%s c%d_h%d_#s%d>\n", 1446 fd->ioDirection ? "Read" : "Write", 1447 pos->track, pos->side, dcnt); 1448 } 1449 (void)iwmSelectSide(pos->side); 1450 fd->iwmErr = iwmWriteSector(&fd->sHdr, fd->w_slots); 1451 1452 switch (fd->iwmErr) { 1453 case noErr: /* Success */ 1454 #ifdef DIAGNOSTIC 1455 /* XXX Panic if buffer not clean? */ 1456 for (i=0; i<IWM_MAX_GCR_SECTORS; i++) 1457 if (0 != fd->w_slots[i].valid) 1458 printf("Oops! <c%d_h%d_s%d> not flushed.\n", 1459 fd->pos.track, fd->pos.side, 1460 fd->pos.sector); 1461 #endif 1462 if (TRACE_STRAT) 1463 printf("(Cache flushed, re-initialize) "); 1464 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) { 1465 fd->w_slots[i].valid = 0; 1466 fd->w_slots[i].secbuf = NULL; 1467 } 1468 fd->seekRetries = 0; 1469 state = state_Exit; 1470 break; 1471 1472 case seekErr: /* Bad seek? Retry */ 1473 if (TRACE_STRAT) { 1474 printf("Wanted track %d, got %d, %d seek retries.\n", 1475 pos->track, shdr->track, fd->seekRetries); 1476 } 1477 if (iwm->maxRetries > fd->seekRetries++) { 1478 fd->iwmErr = seek(fd, IWM_SEEK_RECAL); 1479 if (TRACE_STRAT) { 1480 printf("[%d]", fd->seekRetries); 1481 } 1482 } 1483 state = (0 == fd->iwmErr) ? state_Exit : state_Fault; 1484 break; 1485 1486 default: /* General IWM IO error? */ 1487 state = state_IOErr; 1488 } 1489 return state; 1490 } 1491 1492 1493 /* 1494 * fdstart_IOFinish 1495 * 1496 * Prepare for next block, if any is available 1497 */ 1498 static int 1499 fdstart_IOFinish(fd) 1500 fd_softc_t *fd; 1501 { 1502 int state; 1503 1504 if (DISABLED && TRACE_STRAT) 1505 printf("%s c%d_h%d_s%d ok ", 1506 fd->ioDirection ? "Read" : "Write", 1507 fd->sHdr.track, fd->sHdr.side >> 3, fd->sHdr.sector); 1508 1509 fd->bytesDone += fd->currentType->sectorSize; 1510 fd->bytesLeft -= fd->currentType->sectorSize; 1511 fd->current_buffer += fd->currentType->sectorSize; 1512 /* 1513 * Instead of recalculating the chs mapping for 1514 * each and every sector, check for 1515 * 'current sector# <= max sector#' and recalculate 1516 * after overflow. 1517 */ 1518 fd->startBlk++; 1519 if (fd->bytesLeft > 0) { 1520 if (++fd->pos.sector < fd->pos.maxSect) { 1521 if (TRACE_STRAT) 1522 printf("continue"); 1523 state = (fd->ioDirection == IWM_WRITE) 1524 ? state_Write : state_Read; 1525 } 1526 else { 1527 /* 1528 * Invalidate read cache when changing track; 1529 * flush write cache to disk. 1530 */ 1531 if (fd->ioDirection == IWM_WRITE) { 1532 if (TRACE_STRAT) 1533 printf("flush "); 1534 state = (state_Exit == fdstart_Flush(fd)) 1535 ? state_Seek : state_IOErr; 1536 } 1537 else { 1538 if (TRACE_STRAT) 1539 printf("step "); 1540 invalidateCylinderCache(fd); 1541 state = state_Seek; 1542 } 1543 } 1544 } else { 1545 state = (fd->ioDirection == IWM_WRITE) 1546 ? state_Flush : state_Exit; 1547 } 1548 return state; 1549 } 1550 1551 1552 /* 1553 * fdstart_IOErr 1554 * 1555 * Bad IO, repeat 1556 */ 1557 static int 1558 fdstart_IOErr(fd) 1559 fd_softc_t *fd; 1560 { 1561 int state; 1562 #ifndef _LKM 1563 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1564 #endif 1565 1566 #ifdef DIAGNOSTIC 1567 printf("iwm%sSector() err = %d, %d retries, on c%d_h%d_s%d.\n", 1568 fd->ioDirection ? "Read" : "Write", 1569 fd->iwmErr, fd->ioRetries, fd->pos.track, 1570 fd->pos.side, fd->pos.sector); 1571 #endif 1572 /* XXX Do statistics */ 1573 if (fd->ioRetries++ < iwm->maxRetries) 1574 state = (fd->ioDirection == IWM_WRITE) 1575 ? state_Flush : state_Read; 1576 else 1577 state = state_Fault; 1578 return state; 1579 } 1580 1581 1582 /* 1583 * fdstart_Fault 1584 * 1585 * A non-recoverable error 1586 */ 1587 static int 1588 fdstart_Fault(fd) 1589 fd_softc_t *fd; 1590 { 1591 #ifdef DIAGNOSTIC 1592 printf("Seek retries %d, IO retries %d, sect retries %d :\n" \ 1593 "\t\t only found c%d_h%d_s%d \n", 1594 fd->seekRetries, fd->ioRetries, fd->sectRetries, 1595 fd->sHdr.track, fd->sHdr.side >> 3, fd->sHdr.sector); 1596 printf("A non-recoverable error: %d ", fd->iwmErr); 1597 #else 1598 /* ARGSUSED */ 1599 #endif 1600 return state_Exit; 1601 } 1602 1603 1604 /* 1605 * fdstart_Exit 1606 * 1607 * We are done, for good or bad 1608 */ 1609 static int 1610 fdstart_Exit(fd) 1611 fd_softc_t *fd; 1612 { 1613 struct buf *bp; 1614 #ifdef DIAGNOSTIC 1615 int i; 1616 #endif 1617 1618 invalidateCylinderCache(fd); 1619 1620 #ifdef DIAGNOSTIC 1621 /* XXX Panic if buffer not clean? */ 1622 for (i=0; i<IWM_MAX_GCR_SECTORS; i++) 1623 if (0 != fd->w_slots[i].valid) 1624 printf("Oops! <c%d_h%d_s%d> not flushed.\n", 1625 fd->pos.track, fd->pos.side, fd->pos.sector); 1626 #endif 1627 1628 bp = BUFQ_GET(&fd->bufQueue); 1629 1630 bp->b_resid = fd->bytesLeft; 1631 bp->b_error = (0 == fd->iwmErr) ? 0 : EIO; 1632 if (fd->iwmErr) 1633 bp->b_flags |= B_ERROR; 1634 1635 if (TRACE_STRAT) { 1636 printf(" fdstart() finished job; fd->iwmErr = %d, b_error = %d", 1637 fd->iwmErr, bp->b_error); 1638 if (DISABLED) 1639 hexDump(bp->b_data, bp->b_bcount); 1640 } 1641 if (DISABLED && TRACE_STRAT) 1642 printf(" Next buf (bufQueue first) at %p\n", 1643 BUFQ_PEEK(&fd->bufQueue)); 1644 disk_unbusy(&fd->diskInfo, bp->b_bcount - bp->b_resid, 1645 (bp->b_flags & B_READ)); 1646 biodone(bp); 1647 /* 1648 * Stop motor after 10s 1649 * 1650 * XXX Unloading the module while the timeout is still 1651 * running WILL crash the machine. 1652 */ 1653 callout_reset(&fd->motor_ch, 10 * hz, motor_off, fd); 1654 1655 return state_Done; 1656 } 1657 1658 1659 /* 1660 * remap_geometry 1661 * 1662 * Remap the rigid UN*X view of a disk's cylinder/sector geometry 1663 * to our zone recorded real Sony drive by splitting the disk 1664 * into zones. 1665 * 1666 * Loop { 1667 * Look if logical block number is in current zone 1668 * NO: Add # of tracks for current zone to track counter 1669 * Process next zone 1670 * 1671 * YES: Subtract (number of first sector of current zone times heads) 1672 * from logical block number, then break up the difference 1673 * in tracks/side/sectors (spt is constant within a zone). 1674 * Done 1675 * } 1676 */ 1677 static void 1678 remap_geometry(block, heads, loc) 1679 daddr_t block; 1680 int heads; 1681 diskPosition_t *loc; 1682 { 1683 int zone, spt; 1684 extern diskZone_t diskZones[]; 1685 1686 spt = 0; /* XXX Shut up egcs warning */ 1687 loc->oldTrack = loc->track; 1688 loc->track = 0; 1689 1690 for (zone = 0; zone < IWM_GCR_DISK_ZONES; zone++) { 1691 if (block >= heads * (diskZones[zone].lastBlock + 1)) { 1692 /* Process full zones */ 1693 loc->track += diskZones[zone].tracks; 1694 } else { 1695 /* Process partial zone */ 1696 spt = diskZones[zone].sectPerTrack; 1697 block -= heads * diskZones[zone].firstBlock; 1698 loc->track += block / (spt * heads); 1699 loc->sector = (block % spt); 1700 loc->side = (block % (spt * heads)) / spt; 1701 break; 1702 } 1703 } 1704 loc->maxSect = spt; 1705 } 1706 1707 1708 /* 1709 * motor_off 1710 * 1711 * Callback for timeout() 1712 */ 1713 static void 1714 motor_off(param) 1715 void *param; 1716 { 1717 int spl; 1718 fd_softc_t *fd; 1719 1720 fd = (fd_softc_t *)param; 1721 if (TRACE_STRAT) 1722 printf("iwm: Switching motor OFF (timeout).\n"); 1723 spl = spl6(); 1724 (void)iwmMotor(fd->unit, 0); 1725 fd->state &= ~IWM_FD_MOTOR_ON; 1726 splx(spl); 1727 } 1728 1729 1730 /* 1731 * fdGetDiskLabel 1732 * 1733 * Set up disk label with parameters from current disk type. 1734 * Then call the generic disklabel read routine which tries to 1735 * read a label from disk and insert it. If it doesn't exist use 1736 * our defaults. 1737 */ 1738 static void 1739 fdGetDiskLabel(fd, dev) 1740 fd_softc_t *fd; 1741 dev_t dev; 1742 { 1743 const char *msg; 1744 int fdType; 1745 struct disklabel *lp; 1746 struct cpu_disklabel *clp; 1747 1748 if (TRACE_IOCTL) 1749 printf("iwm: fdGetDiskLabel() for disk %d.\n", 1750 minor(dev) / MAXPARTITIONS); 1751 fdType = minor(dev) % MAXPARTITIONS; 1752 lp = fd->diskInfo.dk_label; 1753 clp = fd->diskInfo.dk_cpulabel; 1754 memset(lp, 0, sizeof(struct disklabel)); 1755 memset(clp, 0, sizeof(struct cpu_disklabel)); 1756 /* 1757 * How to describe a drive with a variable # of sectors per 1758 * track (8..12) and variable rpm (300..550)? Apple came up 1759 * with ZBR in 1983! Un*x drive management sucks. 1760 */ 1761 lp->d_type = DTYPE_FLOPPY; 1762 lp->d_rpm = 300; 1763 lp->d_secsize = fd->currentType->sectorSize; 1764 lp->d_ntracks = fd->currentType->heads; 1765 lp->d_ncylinders = fd->currentType->tracks; 1766 lp->d_nsectors = fd->currentType->secPerTrack; 1767 lp->d_secpercyl = fd->currentType->secPerCyl; 1768 lp->d_secperunit = fd->currentType->secPerDisk; 1769 lp->d_interleave = fd->currentType->interleave; 1770 lp->d_trkseek = fd->currentType->stepRate; 1771 1772 strcpy(lp->d_typename, dktypenames[DTYPE_FLOPPY]); 1773 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1774 1775 lp->d_npartitions = fdType + 1; 1776 lp->d_partitions[fdType].p_offset = 0; 1777 lp->d_partitions[fdType].p_size = lp->d_secperunit; 1778 lp->d_partitions[fdType].p_fstype = FS_BSDFFS; 1779 lp->d_partitions[fdType].p_fsize = 512; 1780 lp->d_partitions[fdType].p_frag = 8; 1781 1782 lp->d_magic = DISKMAGIC; 1783 lp->d_magic2 = DISKMAGIC; 1784 lp->d_checksum = dkcksum(lp); 1785 /* 1786 * Call the generic disklabel extraction routine. If we don't 1787 * find a label on disk, keep our faked one. 1788 */ 1789 if (TRACE_OPEN) 1790 printf(" now calling readdisklabel()...\n"); 1791 1792 msg = readdisklabel(dev, fdstrategy, lp, clp); 1793 if (msg == NULL) { 1794 strncpy(lp->d_packname, "default label", 1795 sizeof(lp->d_packname)); /* XXX - ?? */ 1796 } 1797 #ifdef IWM_DEBUG 1798 else 1799 printf("iwm: %s.\n", msg); 1800 #endif 1801 if (TRACE_OPEN) 1802 fdPrintDiskLabel(lp); 1803 } 1804 1805 1806 1807 /* 1808 * initCylinderCache 1809 * 1810 * Allocate cylinder cache and set up pointers to sectors. 1811 */ 1812 static int 1813 initCylinderCache(fd) 1814 fd_softc_t *fd; 1815 { 1816 int i; 1817 int err; 1818 int secsize; 1819 1820 err = 0; 1821 secsize = fd->currentType->sectorSize; 1822 fd->cachedSide = 0; 1823 1824 fd->cbuf = (unsigned char *) malloc(IWM_MAX_GCR_SECTORS 1825 * secsize, M_DEVBUF, M_WAITOK); 1826 if (NULL == fd->cbuf) 1827 err = ENOMEM; 1828 else 1829 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) { 1830 fd->w_slots[i].valid = 0; 1831 fd->w_slots[i].secbuf = NULL; 1832 1833 fd->r_slots[i].valid = 0; 1834 fd->r_slots[i].secbuf = fd->cbuf + i * secsize; 1835 } 1836 return err; 1837 } 1838 1839 1840 /* 1841 * invalidateCylinderCache 1842 * 1843 * Switching cylinders (tracks?) invalidates the read cache. 1844 */ 1845 static void 1846 invalidateCylinderCache(fd) 1847 fd_softc_t *fd; 1848 { 1849 int i; 1850 1851 fd->cachedSide = 0; 1852 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) { 1853 fd->r_slots[i].valid = 0; 1854 } 1855 } 1856 1857 1858 /* 1859 * getFDType 1860 * 1861 * return pointer to disk format description 1862 */ 1863 static fdInfo_t * 1864 getFDType(unit) 1865 short unit; 1866 { 1867 int driveFlags; 1868 fdInfo_t *thisType; 1869 extern fdInfo_t fdTypes[]; 1870 1871 driveFlags = iwmCheckDrive(unit); 1872 /* 1873 * Drive flags are: Bit 0 - 1 = Drive is double sided 1874 * 1 - 1 = No disk inserted 1875 * 2 - 1 = Motor is off 1876 * 3 - 1 = Disk is writable 1877 * 4 - 1 = Disk is DD (800/720K) 1878 * 31 - 1 = No drive / invalid drive # 1879 */ 1880 if (TRACE_CONFIG) { 1881 printf("iwm: Drive %d says 0x0%x (%d)\n", 1882 unit, driveFlags, driveFlags); 1883 } 1884 if (driveFlags < 0) 1885 thisType = NULL;/* no such drive */ 1886 else 1887 if (driveFlags & 0x01) 1888 thisType = &fdTypes[1]; /* double sided */ 1889 else 1890 thisType = &fdTypes[0]; /* single sided */ 1891 1892 return thisType; 1893 } 1894 1895 1896 /* 1897 * fdDeviceToType 1898 * 1899 * maps the minor device number (elsewhere: partition type) to 1900 * a corresponding disk format. 1901 * This is currently: 1902 * fdXa default (800K GCR) 1903 * fdXb 400K GCR 1904 * fdXc 800K GCR 1905 */ 1906 static fdInfo_t * 1907 fdDeviceToType(fd, dev) 1908 fd_softc_t *fd; 1909 dev_t dev; 1910 { 1911 int type; 1912 fdInfo_t *thisInfo; 1913 /* XXX This broke with egcs 1.0.2 */ 1914 /* extern fdInfo_t fdTypes[]; */ 1915 1916 type = minor(dev) % MAXPARTITIONS; /* 1,2,... */ 1917 if (type > sizeof(fdTypes) / sizeof(fdTypes[0])) 1918 thisInfo = NULL; 1919 else 1920 thisInfo = (type == 0) ? fd->defaultType : &fdTypes[type - 1]; 1921 return thisInfo; 1922 } 1923 1924 1925 /* 1926 * seek 1927 * 1928 * Step to given track; optionally restore to track zero before 1929 * and/or verify correct track. 1930 * Note that any necessary retries are done here. 1931 * We keep the current position on disk in a 'struct diskPosition'. 1932 */ 1933 static int 1934 seek(fd, style) 1935 fd_softc_t *fd; 1936 int style; 1937 { 1938 int state, done; 1939 int err, ierr; 1940 int steps; 1941 1942 diskPosition_t *loc; 1943 sectorHdr_t hdr; 1944 char action[32]; 1945 #ifndef _LKM 1946 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1947 #endif 1948 1949 char *stateDesc[] = { 1950 "Init", 1951 "Seek", 1952 "Recalibrate", 1953 "Verify", 1954 "Exit" 1955 }; 1956 enum { 1957 state_Init = 0, 1958 state_Seek, 1959 state_Recalibrate, 1960 state_Verify, 1961 state_Exit 1962 }; 1963 /* XXX egcs */ 1964 done = err = ierr = 0; 1965 fd->seekRetries = 0; 1966 fd->verifyRetries = 0; 1967 1968 loc = &fd->pos; 1969 1970 state = state_Init; 1971 do { 1972 if (TRACE_STEP) 1973 printf(" seek state %d [%s].\n", 1974 state, stateDesc[state]); 1975 switch (state) { 1976 1977 case state_Init: 1978 if (TRACE_STEP) 1979 printf("Current track is %d, new track %d.\n", 1980 loc->oldTrack, loc->track); 1981 memset(&hdr, 0, sizeof(hdr)); 1982 err = ierr = 0; 1983 fd->seekRetries = 0; 1984 fd->verifyRetries = 0; 1985 state = (style == IWM_SEEK_RECAL) 1986 ? state_Recalibrate : state_Seek; 1987 done = 0; 1988 break; 1989 1990 case state_Recalibrate: 1991 ierr = iwmTrack00(); 1992 if (ierr == 0) { 1993 loc->oldTrack = 0; 1994 state = state_Seek; 1995 } else { 1996 strncpy(action, "Recalibrate (track 0)", 1997 sizeof(action)); 1998 state = state_Exit; 1999 } 2000 break; 2001 2002 case state_Seek: 2003 ierr = 0; 2004 steps = loc->track - loc->oldTrack; 2005 2006 if (steps != 0) 2007 ierr = iwmSeek(steps); 2008 if (ierr == 0) { 2009 /* No error or nothing to do */ 2010 state = (style == IWM_SEEK_VERIFY) 2011 ? state_Verify : state_Exit; 2012 } else { 2013 if (fd->seekRetries++ < iwm->maxRetries) 2014 state = state_Recalibrate; 2015 else { 2016 strncpy(action, "Seek retries", 2017 sizeof(action)); 2018 state = state_Exit; 2019 } 2020 } 2021 break; 2022 2023 case state_Verify: 2024 ierr = checkTrack(loc, TRACE_STEP); 2025 if (ierr == 0 && loc->track == hdr.track) 2026 state = state_Exit; 2027 else { 2028 if (fd->verifyRetries++ < iwm->maxRetries) 2029 state = state_Recalibrate; 2030 else { 2031 strncpy(action, "Verify retries", 2032 sizeof(action)); 2033 state = state_Exit; 2034 } 2035 } 2036 break; 2037 2038 case state_Exit: 2039 if (ierr == 0) { 2040 loc->oldTrack = loc->track; 2041 err = 0; 2042 /* Give the head some time to settle down */ 2043 delay(3000); 2044 } else { 2045 #ifdef DIAGNOSTIC 2046 printf(" seek() action \"%s\", err = %d.\n", 2047 action, ierr); 2048 #endif 2049 err = EIO; 2050 } 2051 done = 1; 2052 break; 2053 } 2054 } while (!done); 2055 return err; 2056 } 2057 2058 2059 /* 2060 * checkTrack 2061 * 2062 * After positioning, get a sector header for validation 2063 */ 2064 static int 2065 checkTrack(loc, debugFlag) 2066 diskPosition_t *loc; 2067 int debugFlag; 2068 { 2069 int spl; 2070 int iwmErr; 2071 sectorHdr_t hdr; 2072 2073 spl = spl6(); 2074 iwmSelectSide(loc->side); 2075 iwmErr = iwmReadSectHdr(&hdr); 2076 splx(spl); 2077 if (debugFlag) { 2078 printf("Seeked for %d, got at %d, Hdr read err %d.\n", 2079 loc->track, hdr.track, iwmErr); 2080 } 2081 return iwmErr; 2082 } 2083 2084 2085 /* Debugging stuff */ 2086 2087 static void 2088 hexDump(buf, len) 2089 u_char *buf; 2090 int len; 2091 { 2092 int i, j; 2093 u_char ch; 2094 2095 printf("\nDump %d from %p:\n", len, buf); 2096 i = j = 0; 2097 if (NULL != buf) do { 2098 printf("%04x: ", i); 2099 for (j = 0; j < 8; j++) 2100 printf("%02x ", buf[i + j]); 2101 printf(" "); 2102 for (j = 8; j < 16; j++) 2103 printf("%02x ", buf[i + j]); 2104 printf(" "); 2105 for (j = 0; j < 16; j++) { 2106 ch = buf[i + j]; 2107 if (ch > 31 && ch < 127) 2108 printf("%c", ch); 2109 else 2110 printf("."); 2111 } 2112 printf("\n"); 2113 i += 16; 2114 } while (len > i); 2115 } 2116 2117 2118 static void 2119 fdPrintDiskLabel(lp) 2120 struct disklabel *lp; 2121 { 2122 int i; 2123 2124 printf("iwm: Disklabel entries of current floppy.\n"); 2125 printf("\t d_type:\t%d (%s)\n", lp->d_type, 2126 dktypenames[lp->d_type]); 2127 printf("\t d_typename:\t%s\n", lp->d_typename); 2128 printf("\t d_packname:\t%s\n", lp->d_packname); 2129 2130 printf("\t d_secsize:\t%d\n", lp->d_secsize); 2131 printf("\t d_nsectors:\t%d\n", lp->d_nsectors); 2132 printf("\t d_ntracks:\t%d\n", lp->d_ntracks); 2133 printf("\t d_ncylinders:\t%d\n", lp->d_ncylinders); 2134 printf("\t d_secpercyl:\t%d\n", lp->d_secpercyl); 2135 printf("\t d_secperunit:\t%d\n", lp->d_secperunit); 2136 2137 printf("\t d_rpm: \t%d\n", lp->d_rpm); 2138 printf("\t d_interleave:\t%d\n", lp->d_interleave); 2139 printf("\t d_trkseek:\t%d [ms]\n", lp->d_trkseek); 2140 2141 printf(" d_npartitions:\t%d\n", lp->d_npartitions); 2142 for (i = 0; i < lp->d_npartitions; i++) { 2143 printf("\t d_partitions[%d].p_offset:\t%d\n", i, 2144 lp->d_partitions[i].p_offset); 2145 printf("\t d_partitions[%d].p_size:\t%d\n", i, 2146 lp->d_partitions[i].p_size); 2147 printf("\t d_partitions[%d].p_fstype:\t%d (%s)\n", i, 2148 lp->d_partitions[i].p_fstype, 2149 fstypenames[lp->d_partitions[i].p_fstype]); 2150 printf("\t d_partitions[%d].p_frag:\t%d\n", i, 2151 lp->d_partitions[i].p_frag); 2152 printf("\n"); 2153 } 2154 } 2155
Indexes created Mon Sep 29 21:09:56 GMT 2025