iwm_fd.c revision 1.9
1 /* $NetBSD: iwm_fd.c,v 1.9 2000/04/05 11:37:13 jdolecek 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 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/callout.h> 38 #include <sys/kernel.h> 39 #include <sys/file.h> 40 #include <sys/ioctl.h> 41 #include <sys/malloc.h> 42 #include <sys/device.h> 43 44 #define FSTYPENAMES 45 #define DKTYPENAMES 46 #include <sys/disklabel.h> 47 48 #include <sys/disk.h> 49 #include <sys/dkbad.h> 50 #include <sys/buf.h> 51 #include <sys/uio.h> 52 #include <sys/stat.h> 53 #include <sys/syslog.h> 54 #include <sys/conf.h> 55 56 #include <machine/autoconf.h> 57 #include <machine/cpu.h> 58 59 #include <mac68k/obio/iwmreg.h> 60 #include <mac68k/obio/iwm_fdvar.h> 61 62 #ifdef _LKM 63 #include "iwm_mod.h" 64 #endif 65 66 /** 67 ** Private functions 68 **/ 69 static int map_iwm_base __P((vm_offset_t base)); 70 71 /* Autoconfig */ 72 int iwm_match __P((struct device *, struct cfdata *, void *)); 73 void iwm_attach __P((struct device *, struct device *, void *)); 74 int iwm_print __P((void *, const char *)); 75 int fd_match __P((struct device *, struct cfdata *, void *)); 76 void fd_attach __P((struct device *, struct device *, void *)); 77 int fd_print __P((void *, const char *)); 78 79 /* Disklabel stuff */ 80 static void fdGetDiskLabel __P((fd_softc_t *fd, dev_t dev)); 81 static void fdPrintDiskLabel __P((struct disklabel *lp)); 82 83 static fdInfo_t *getFDType __P((short unit)); 84 static fdInfo_t *fdDeviceToType __P((fd_softc_t *fd, dev_t dev)); 85 86 static void fdstart __P((fd_softc_t *fd)); 87 static void remap_geometry __P((daddr_t block, int heads, diskPosition_t *loc)); 88 static void motor_off __P((void *param)); 89 static int seek __P((fd_softc_t *fd, int style)); 90 static int checkTrack __P((diskPosition_t *loc, int debugFlag)); 91 static int initCylinderCache __P((fd_softc_t *fd)); 92 static void invalidateCylinderCache __P((fd_softc_t *fd)); 93 94 #ifdef _LKM 95 static int probe_fd __P((void)); 96 int fd_mod_init __P((void)); 97 int fd_mod_free __P((void)); 98 #endif 99 100 static int fdstart_Init __P((fd_softc_t *fd)); 101 static int fdstart_Seek __P((fd_softc_t *fd)); 102 static int fdstart_Read __P((fd_softc_t *fd)); 103 static int fdstart_Write __P((fd_softc_t *fd)); 104 static int fdstart_Flush __P((fd_softc_t *fd)); 105 static int fdstart_IOFinish __P((fd_softc_t *fd)); 106 static int fdstart_IOErr __P((fd_softc_t *fd)); 107 static int fdstart_Fault __P((fd_softc_t *fd)); 108 static int fdstart_Exit __P((fd_softc_t *fd)); 109 110 111 /** 112 ** Driver debugging 113 **/ 114 115 #ifdef DEBUG 116 #define IWM_DEBUG 117 #endif 118 119 120 static void hexDump __P((u_char *buf, int len)); 121 122 /* 123 * Stuff taken from Egan/Teixeira ch 8: 'if(TRACE_FOO)' debug output 124 * statements don't break indentation, and when DEBUG is not defined, 125 * the compiler code optimizer drops them as dead code. 126 */ 127 #ifdef IWM_DEBUG 128 #define M_TRACE_CONFIG 0x0001 129 #define M_TRACE_OPEN 0x0002 130 #define M_TRACE_CLOSE 0x0004 131 #define M_TRACE_READ 0x0008 132 #define M_TRACE_WRITE 0x0010 133 #define M_TRACE_STRAT (M_TRACE_READ | M_TRACE_WRITE) 134 #define M_TRACE_IOCTL 0x0020 135 #define M_TRACE_STEP 0x0040 136 #define M_TRACE_ALL 0xFFFF 137 138 #define TRACE_CONFIG (iwmDebugging & M_TRACE_CONFIG) 139 #define TRACE_OPEN (iwmDebugging & M_TRACE_OPEN) 140 #define TRACE_CLOSE (iwmDebugging & M_TRACE_CLOSE) 141 #define TRACE_READ (iwmDebugging & M_TRACE_READ) 142 #define TRACE_WRITE (iwmDebugging & M_TRACE_WRITE) 143 #define TRACE_STRAT (iwmDebugging & M_TRACE_STRAT) 144 #define TRACE_IOCTL (iwmDebugging & M_TRACE_IOCTL) 145 #define TRACE_STEP (iwmDebugging & M_TRACE_STEP) 146 #define TRACE_ALL (iwmDebugging & M_TRACE_ALL) 147 148 /* -1 = all active */ 149 int iwmDebugging = 0 /* | M_TRACE_OPEN | M_TRACE_STRAT | M_TRACE_IOCTL */ ; 150 151 #else 152 #define TRACE_CONFIG 0 153 #define TRACE_OPEN 0 154 #define TRACE_CLOSE 0 155 #define TRACE_READ 0 156 #define TRACE_WRITE 0 157 #define TRACE_STRAT 0 158 #define TRACE_IOCTL 0 159 #define TRACE_STEP 0 160 #define TRACE_ALL 0 161 #endif 162 163 #define DISABLED 0 164 165 166 167 /** 168 ** Module-global Variables 169 **/ 170 171 /* The IWM base address */ 172 u_long IWMBase; 173 174 /* 175 * Table of supported disk types. 176 * The table order seems to be pretty standardized across NetBSD ports, but 177 * then, they are all MFM... So we roll our own for now. 178 */ 179 static fdInfo_t fdTypes[] = { 180 {1, 80, 512, 10, 10, 800, 12, 2, IWM_GCR, "400K Sony"}, 181 {2, 80, 512, 10, 20, 1600, 12, 2, IWM_GCR, "800K Sony"} 182 }; 183 184 /* Table of GCR disk zones for one side (see IM II-211, The Disk Driver) */ 185 static diskZone_t diskZones[] = { 186 {16, 12, 0, 191}, 187 {16, 11, 192, 367}, 188 {16, 10, 368, 527}, 189 {16, 9, 528, 671}, 190 {16, 8, 672, 799} 191 }; 192 193 /* disk(9) framework device switch */ 194 struct dkdriver fd_dkDriver = { 195 fdstrategy 196 }; 197 198 /* Drive format codes/indexes */ 199 enum { 200 IWM_400K_GCR = 0, 201 IWM_800K_GCR = 1, 202 IWM_720K_MFM = 2, 203 IWM_1440K_MFM = 3 204 }; 205 206 207 /** 208 ** Autoconfiguration code 209 **/ 210 211 /* 212 * Autoconfig data structures 213 * 214 * These data structures (see <sys/device.h>) are referenced in 215 * compile/$KERNEL/ioconf.c, which is generated by config(8). 216 * Their names are formed like {device}_{ca,cd}. 217 * 218 * {device}_ca 219 * is used for dynamically allocating driver data, probing and 220 * attaching a device; 221 * 222 * {device}_cd 223 * references all found devices of a type. 224 */ 225 #ifdef _LKM 226 227 struct cfdriver iwm_cd = { 228 NULL, /* Ptr to array of devices found */ 229 "iwm", /* Device name string */ 230 DV_DULL, /* Device classification */ 231 0 /* Number of devices found */ 232 }; 233 struct cfdriver fd_cd = { 234 NULL, 235 "fd", 236 DV_DISK, 237 0 238 }; 239 240 #else /* defined _LKM */ 241 242 extern struct cfdriver iwm_cd; 243 extern struct cfdriver fd_cd; 244 245 #endif /* defined _LKM */ 246 247 /* IWM floppy disk controller */ 248 struct cfattach iwm_ca = { 249 sizeof(iwm_softc_t), /* Size of device data for malloc() */ 250 iwm_match, /* Probe device and return match level */ 251 iwm_attach /* Initialize and attach device */ 252 }; 253 254 /* Attached floppy disk drives */ 255 struct cfattach fd_ca = { 256 sizeof(fd_softc_t), 257 fd_match, 258 fd_attach 259 }; 260 261 262 263 /*** Configure the IWM controller ***/ 264 265 /* 266 * iwm_match 267 * 268 * Is the IWM chip present? Here, *auxp is a ptr to struct confargs 269 * (see <mac68k/mac68k/autoconf.h>), which does not hold any information 270 * to match against. After all, that's what the obio concept is 271 * about: Onboard components that are present depending (only) 272 * on machine type. 273 */ 274 int 275 iwm_match(parent, match, auxp) 276 struct device *parent; 277 struct cfdata *match; 278 void *auxp; 279 { 280 int matched; 281 #ifdef _LKM 282 int iwmErr; 283 #endif 284 extern u_long IOBase; /* from mac68k/machdep.c */ 285 extern u_long IWMBase; 286 287 if (0 == map_iwm_base(IOBase)) { 288 /* 289 * Unknown machine HW: 290 * The SWIM II/III chips that are present in post-Q700 291 * '040 Macs have dropped the IWM register structure. 292 * We know next to nothing about the SWIM. 293 */ 294 matched = 0; 295 if (TRACE_CONFIG) 296 printf("IWM or SWIM not found: Unknown location (SWIM II?).\n"); 297 } else { 298 matched = 1; 299 if (TRACE_CONFIG) { 300 printf("iwm: IWMBase mapped to 0x%lx in VM.\n", 301 IWMBase); 302 } 303 #ifdef _LKM 304 iwmErr = iwmInit(); 305 if (TRACE_CONFIG) 306 printf("initIWM() says %d.\n", iwmErr); 307 matched = (iwmErr == 0) ? 1 : 0; 308 #endif 309 } 310 return matched; 311 } 312 313 314 /* 315 * iwm_attach 316 * 317 * The IWM is present, initialize it. Then look up the connected drives 318 * and attach them. 319 */ 320 void 321 iwm_attach(parent, self, auxp) 322 struct device *parent; 323 struct device *self; 324 void *auxp; 325 { 326 int iwmErr; 327 iwm_softc_t *iwm; 328 iwmAttachArgs_t ia; 329 330 printf(": Apple GCR floppy disk controller\n"); 331 iwm = (iwm_softc_t *)self; 332 333 iwmErr = iwmInit(); 334 if (TRACE_CONFIG) 335 printf("initIWM() says %d.\n", iwmErr); 336 337 if (0 == iwmErr) { 338 /* Set up the IWM softc */ 339 iwm->maxRetries = 10; 340 341 /* Look for attached drives */ 342 for (ia.unit = 0; ia.unit < IWM_MAX_DRIVE; ia.unit++) { 343 iwm->fd[ia.unit] = NULL; 344 ia.driveType = getFDType(ia.unit); 345 if (NULL != ia.driveType) 346 config_found_sm(self, (void *)&ia, 347 fd_print, NULL); 348 } 349 if (TRACE_CONFIG) 350 printf("iwm: Initialization completed.\n"); 351 } else { 352 printf("iwm: Chip revision not supported (%d)\n", iwmErr); 353 } 354 } 355 356 357 /* 358 * iwm_print -- print device configuration. 359 * 360 * If the device is not configured 'controller' it is NULL and 361 * we print a message in the *Attach routine; the return value 362 * of *Print() is ignored. 363 */ 364 int 365 iwm_print(auxp, controller) 366 void *auxp; 367 const char *controller; 368 { 369 return UNCONF; 370 } 371 372 373 /* 374 * map_iwm_base 375 * 376 * Map physical IO address of IWM to VM address 377 */ 378 static int 379 map_iwm_base(base) 380 vm_offset_t base; 381 { 382 int known; 383 extern u_long IWMBase; 384 385 switch (current_mac_model->class) { 386 case MACH_CLASSQ: 387 case MACH_CLASSQ2: 388 case MACH_CLASSP580: 389 IWMBase = base + 0x1E000; 390 known = 1; 391 break; 392 case MACH_CLASSII: 393 case MACH_CLASSPB: 394 case MACH_CLASSDUO: 395 case MACH_CLASSIIci: 396 case MACH_CLASSIIsi: 397 case MACH_CLASSIIvx: 398 case MACH_CLASSLC: 399 IWMBase = base + 0x16000; 400 known = 1; 401 break; 402 case MACH_CLASSIIfx: 403 case MACH_CLASSAV: 404 default: 405 /* 406 * Neither IIfx/Q9[05]0 style IOP controllers nor 407 * Q[68]40AV DMA based controllers are supported. 408 */ 409 if (TRACE_CONFIG) 410 printf("Unknown floppy controller chip.\n"); 411 IWMBase = 0L; 412 known = 0; 413 break; 414 } 415 return known; 416 } 417 418 419 /*** Configure Sony disk drive(s) ***/ 420 421 /* 422 * fd_match 423 */ 424 int 425 fd_match(parent, match, auxp) 426 struct device *parent; 427 struct cfdata *match; 428 void *auxp; 429 { 430 int matched, cfUnit; 431 struct cfdata *cfp; 432 iwmAttachArgs_t *fdParams; 433 434 cfp = match; 435 fdParams = (iwmAttachArgs_t *)auxp; 436 cfUnit = cfp->cf_loc[0]; 437 matched = (cfUnit == fdParams->unit || cfUnit == -1) ? 1 : 0; 438 if (TRACE_CONFIG) { 439 printf("fdMatch() drive %d ? cfUnit = %d\n", 440 fdParams->unit, cfp->cf_loc[0]); 441 } 442 return matched; 443 } 444 445 446 /* 447 * fd_attach 448 * 449 * We have checked that the IWM is fine and the drive is present, 450 * so we can attach it. 451 */ 452 void 453 fd_attach(parent, self, auxp) 454 struct device *parent; 455 struct device *self; 456 void *auxp; 457 { 458 iwm_softc_t *iwm; 459 fd_softc_t *fd; 460 iwmAttachArgs_t *ia; 461 int driveInfo; 462 463 iwm = (iwm_softc_t *)parent; 464 fd = (fd_softc_t *)self; 465 ia = (iwmAttachArgs_t *)auxp; 466 467 driveInfo = iwmCheckDrive(ia->unit); 468 469 fd->currentType = ia->driveType; 470 fd->unit = ia->unit; 471 fd->defaultType = &fdTypes[IWM_800K_GCR]; 472 fd->stepDirection = 0; 473 474 iwm->fd[ia->unit] = fd; /* iwm has ptr to this drive */ 475 iwm->drives++; 476 477 BUFQ_INIT(&fd->bufQueue); 478 callout_init(&fd->motor_ch); 479 480 printf(" drive %d: ", fd->unit); 481 482 if (IWM_NO_DISK & driveInfo) { 483 printf("(drive empty)\n"); 484 } else 485 if (!(IWM_DD_DISK & driveInfo)) { 486 printf("(HD disk -- not supported)\n"); 487 iwmDiskEject(fd->unit); /* XXX */ 488 } else { 489 printf("%s %d cyl, %d head(s)\n", 490 fd->currentType->description, 491 fd->currentType->tracks, 492 fd->currentType->heads); 493 } 494 if (TRACE_CONFIG) { 495 int reg, flags, spl; 496 497 /* List contents of drive status registers */ 498 spl = spl6(); 499 for (reg = 0; reg < 0x10; reg++) { 500 flags = iwmQueryDrvFlag(fd->unit, reg); 501 printf("iwm: Drive register 0x%x = 0x%x\n", reg, flags); 502 } 503 splx(spl); 504 } 505 fd->diskInfo.dk_name = fd->devInfo.dv_xname; 506 fd->diskInfo.dk_driver = &fd_dkDriver; 507 disk_attach(&fd->diskInfo); 508 } 509 510 511 /* 512 * fdPrint -- print device configuration. 513 * 514 * If the device is not configured 'controller' refers to a name string 515 * we print here. 516 * Else it is NULL and we print a message in the *Attach routine; the 517 * return value of *Print() is ignored. 518 */ 519 int 520 fd_print(auxp, controller) 521 void *auxp; 522 const char *controller; 523 { 524 iwmAttachArgs_t *ia; 525 526 ia = (iwmAttachArgs_t *)auxp; 527 if (NULL != controller) 528 printf("fd%d at %s", ia->unit, controller); 529 return UNCONF; 530 } 531 532 533 #ifdef _LKM 534 535 static iwm_softc_t *iwm; 536 537 /* 538 * fd_mod_init 539 * 540 * Any initializations necessary after loading the module happen here. 541 */ 542 int 543 fd_mod_init(void) 544 { 545 int err; 546 547 iwm = (iwm_softc_t *)malloc(sizeof(iwm_softc_t), M_DEVBUF, M_WAITOK); 548 549 err = (1 == iwm_match(NULL, NULL, NULL)) ? 0 : EIO; 550 if (!err) { 551 memset(iwm, 0, sizeof(iwm_softc_t)); 552 iwm->maxRetries = 10; 553 err = (0 == probe_fd()) ? 0 : EIO; 554 } 555 return err; 556 } 557 558 559 /* 560 * fd_mod_free 561 * 562 * Necessary clean-up before unloading the module. 563 */ 564 void 565 fd_mod_free(void) 566 { 567 int unit, spl; 568 569 spl = splbio(); 570 /* Release any allocated memory */ 571 for (unit = 0; unit < IWM_MAX_DRIVE; unit++) 572 if (iwm->fd[unit] != NULL) { 573 /* 574 * Let's hope there is only one task per drive, 575 * see callout(9). 576 */ 577 callout_stop(&iwm->fd[unit]->motor_ch); 578 disk_detach(&iwm->fd[unit]->diskInfo); 579 free(iwm->fd[unit], M_DEVBUF); 580 iwm->fd[unit] = NULL; 581 } 582 free(iwm, M_DEVBUF); 583 splx(spl); 584 } 585 586 587 /* 588 * probe_fd 589 * 590 * See if there are any drives out there and configure them. 591 * If we find a drive we allocate a softc structure for it and 592 * insert its address into the iwm_softc. 593 * 594 * XXX Merge the remainder of probeFD() with the autoconfig framework. 595 */ 596 static int 597 probe_fd(void) 598 { 599 fd_softc_t *fd; 600 iwmAttachArgs_t ia; 601 int err, unit; 602 603 err = 0; 604 for (ia.unit = 0; ia.unit < IWM_MAX_DRIVE; ia.unit++) { 605 ia.driveType = getFDType(ia.unit); 606 if (NULL == ia.driveType) { 607 iwm->fd[ia.unit] = NULL; 608 continue; 609 } 610 fd = (fd_softc_t *)malloc(sizeof(fd_softc_t), 611 M_DEVBUF, M_WAITOK); 612 if (fd == NULL) { 613 err = ENOMEM; 614 break; 615 } else { 616 memset(fd, 0, sizeof(fd_softc_t)); 617 618 /* This is usually set by the autoconfig framework */ 619 sprintf(fd->devInfo.dv_xname, "fd%d%c", ia.unit, 'a'); 620 fd_attach((struct device *)iwm, (struct device *)fd, 621 &ia); 622 } 623 } 624 if (err) { 625 /* Release any allocated memory */ 626 for (unit = 0; unit < IWM_MAX_DRIVE; unit++) 627 if (iwm->fd[unit] != NULL) { 628 free(iwm->fd[unit], M_DEVBUF); 629 iwm->fd[unit] = NULL; 630 } 631 } 632 return err; 633 } 634 635 #endif /* defined _LKM */ 636 637 638 /** 639 ** Implementation section of driver interface 640 ** 641 ** The prototypes for these functions are set up automagically 642 ** by macros in mac68k/conf.c. Their names are generated from {fd} 643 ** and {open,close,strategy,dump,size,read,write}. The driver entry 644 ** points are then plugged into bdevsw[] and cdevsw[]. 645 **/ 646 647 648 /* 649 * fdopen 650 * 651 * Open a floppy disk device. 652 */ 653 int 654 fdopen(dev, flags, devType, proc) 655 dev_t dev; 656 int flags; 657 int devType; 658 struct proc *proc; 659 { 660 fd_softc_t *fd; 661 fdInfo_t *info; 662 int partitionMask; 663 int fdType, fdUnit; 664 int ierr, err; 665 #ifndef _LKM 666 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 667 #endif 668 info = NULL; /* XXX shut up egcs */ 669 670 /* 671 * See <device.h> for struct cfdriver, <disklabel.h> for 672 * DISKUNIT() and <atari/atari/device.h> for getsoftc(). 673 */ 674 fdType = minor(dev) % MAXPARTITIONS; 675 fdUnit = minor(dev) / MAXPARTITIONS; 676 if (TRACE_OPEN) 677 printf("iwm: Open drive %d", fdUnit); 678 679 /* Check if device # is valid */ 680 err = (iwm->drives < fdUnit) ? ENXIO : 0; 681 if (!err) { 682 (void)iwmSelectDrive(fdUnit); 683 if (TRACE_OPEN) 684 printf(".\n Get softc"); 685 686 /* Get fd state */ 687 fd = iwm->fd[fdUnit]; 688 err = (NULL == fd) ? ENXIO : 0; 689 } 690 if (!err) { 691 if (fd->state & IWM_FD_IS_OPEN) { 692 /* 693 * Allow multiple open calls only if for identical 694 * floppy format. 695 */ 696 if (TRACE_OPEN) 697 printf(".\n Drive already opened!\n"); 698 err = (fd->partition == fdType) ? 0 : ENXIO; 699 } else { 700 if (TRACE_OPEN) 701 printf(".\n Get format info"); 702 703 /* Get format type */ 704 info = fdDeviceToType(fd, dev); 705 if (NULL == info) { 706 err = ENXIO; 707 if (TRACE_OPEN) 708 printf(".\n No such drive.\n"); 709 } 710 } 711 } 712 if (!err && !(fd->state & IWM_FD_IS_OPEN)) { 713 if (TRACE_OPEN) 714 printf(".\n Set diskInfo flags.\n"); 715 716 fd->writeLabel = 0; /* XXX currently unused */ 717 fd->partition = fdType; 718 fd->currentType = info; 719 fd->drvFlags = iwmCheckDrive(fd->unit); 720 721 if (fd->drvFlags & IWM_NO_DISK) { 722 err = EIO; 723 #ifdef DIAGNOSTIC 724 printf(" Drive %d is empty.\n", fd->unit); 725 #endif 726 } else { 727 if (!(fd->drvFlags & IWM_WRITEABLE) && (flags & FWRITE)) { 728 729 err = EPERM; 730 #ifdef DIAGNOSTIC 731 printf(" Disk is write protected.\n"); 732 #endif 733 } else { 734 if (!(fd->drvFlags & IWM_DD_DISK)) { 735 err = ENXIO; 736 #ifdef DIAGNOSTIC 737 printf(" HD format not supported.\n"); 738 #endif 739 (void)iwmDiskEject(fd->unit); 740 } else { 741 /* We're open now! */ 742 fd->state |= IWM_FD_IS_OPEN; 743 err = initCylinderCache(fd); 744 } 745 } 746 } 747 } 748 if (!err) { 749 /* 750 * Later, we might not want to recalibrate the drive when it 751 * is already open. For now, it doesn't hurt. 752 */ 753 if (TRACE_OPEN) 754 printf(" Seek track 00 says"); 755 756 memset(&fd->pos, 0, sizeof(diskPosition_t)); 757 ierr = seek(fd, IWM_SEEK_RECAL); 758 if (TRACE_OPEN) 759 printf(" %d.\n", ierr); 760 err = (0 == ierr) ? 0 : EIO; 761 } 762 if (!err) { 763 /* 764 * Update disklabel if we are not yet open. 765 * (We shouldn't be: We are synchronous.) 766 */ 767 if (fd->diskInfo.dk_openmask == 0) 768 fdGetDiskLabel(fd, dev); 769 770 partitionMask = (1 << fdType); 771 772 switch (devType) { 773 case S_IFCHR: 774 fd->diskInfo.dk_copenmask |= partitionMask; 775 break; 776 777 case S_IFBLK: 778 fd->diskInfo.dk_bopenmask |= partitionMask; 779 break; 780 } 781 fd->diskInfo.dk_openmask = 782 fd->diskInfo.dk_copenmask | fd->diskInfo.dk_bopenmask; 783 } 784 if (TRACE_OPEN) 785 printf("iwm: fdopen() says %d.\n", err); 786 return err; 787 } 788 789 790 /* 791 * fdclose 792 */ 793 int 794 fdclose(dev, flags, devType, proc) 795 dev_t dev; 796 int flags; 797 int devType; 798 struct proc *proc; 799 { 800 fd_softc_t *fd; 801 int partitionMask, fdUnit, fdType; 802 #ifndef _LKM 803 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 804 #endif 805 806 if (TRACE_CLOSE) 807 printf("iwm: Closing driver."); 808 fdUnit = minor(dev) / MAXPARTITIONS; 809 fdType = minor(dev) % MAXPARTITIONS; 810 fd = iwm->fd[fdUnit]; 811 /* release cylinder cache memory */ 812 if (fd->cbuf != NULL) 813 free(fd->cbuf, M_DEVBUF); 814 815 partitionMask = (1 << fdType); 816 817 /* Set state flag. */ 818 fd->state &= ~IWM_FD_IS_OPEN; 819 820 switch (devType) { 821 case S_IFCHR: 822 fd->diskInfo.dk_copenmask &= ~partitionMask; 823 break; 824 825 case S_IFBLK: 826 fd->diskInfo.dk_bopenmask &= ~partitionMask; 827 break; 828 } 829 fd->diskInfo.dk_openmask = 830 fd->diskInfo.dk_copenmask | fd->diskInfo.dk_bopenmask; 831 return 0; 832 } 833 834 835 /* 836 * fdioctl 837 * 838 * We deal with all the disk-specific ioctls in <sys/dkio.h> here even if 839 * we do not support them. 840 */ 841 int 842 fdioctl(dev, cmd, data, flags, proc) 843 dev_t dev; 844 u_long cmd; 845 caddr_t data; 846 int flags; 847 struct proc *proc; 848 { 849 int result, fdUnit, fdType; 850 fd_softc_t *fd; 851 #ifndef _LKM 852 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 853 #endif 854 855 if (TRACE_IOCTL) 856 printf("iwm: Execute ioctl... "); 857 858 /* Check if device # is valid and get its softc */ 859 fdUnit = minor(dev) / MAXPARTITIONS; 860 fdType = minor(dev) % MAXPARTITIONS; 861 if (fdUnit >= iwm->drives) { 862 if (TRACE_IOCTL) { 863 printf("iwm: Wanted device no (%d) is >= %d.\n", 864 fdUnit, iwm->drives); 865 } 866 return ENXIO; 867 } 868 fd = iwm->fd[fdUnit]; 869 result = 0; 870 871 switch (cmd) { 872 case DIOCGDINFO: 873 if (TRACE_IOCTL) 874 printf(" DIOCGDINFO: Get in-core disklabel.\n"); 875 *(struct disklabel *) data = *(fd->diskInfo.dk_label); 876 result = 0; 877 break; 878 879 case DIOCSDINFO: 880 if (TRACE_IOCTL) 881 printf(" DIOCSDINFO: Set in-core disklabel.\n"); 882 result = ((flags & FWRITE) == 0) ? EBADF : 0; 883 if (result == 0) 884 result = setdisklabel(fd->diskInfo.dk_label, 885 (struct disklabel *)data, 0, 886 fd->diskInfo.dk_cpulabel); 887 break; 888 889 case DIOCWDINFO: 890 if (TRACE_IOCTL) 891 printf(" DIOCWDINFO: Set in-core disklabel " 892 "& update disk.\n"); 893 result = ((flags & FWRITE) == 0) ? EBADF : 0; 894 895 if (result == 0) 896 result = setdisklabel(fd->diskInfo.dk_label, 897 (struct disklabel *)data, 0, 898 fd->diskInfo.dk_cpulabel); 899 if (result == 0) 900 result = writedisklabel(dev, fdstrategy, 901 fd->diskInfo.dk_label, 902 fd->diskInfo.dk_cpulabel); 903 break; 904 905 case DIOCGPART: 906 if (TRACE_IOCTL) 907 printf(" DIOCGPART: Get disklabel & partition table.\n"); 908 ((struct partinfo *)data)->disklab = fd->diskInfo.dk_label; 909 ((struct partinfo *)data)->part = 910 &fd->diskInfo.dk_label->d_partitions[fdType]; 911 result = 0; 912 break; 913 914 case DIOCRFORMAT: 915 case DIOCWFORMAT: 916 if (TRACE_IOCTL) 917 printf(" DIOC{R,W}FORMAT: No formatter support (yet?).\n"); 918 result = EINVAL; 919 break; 920 921 case DIOCSSTEP: 922 if (TRACE_IOCTL) 923 printf(" DIOCSSTEP: IWM does step handshake.\n"); 924 result = EINVAL; 925 break; 926 927 case DIOCSRETRIES: 928 if (TRACE_IOCTL) 929 printf(" DIOCSRETRIES: Set max. # of retries.\n"); 930 if (*(int *)data < 0) 931 result = EINVAL; 932 else { 933 iwm->maxRetries = *(int *)data; 934 result = 0; 935 } 936 break; 937 938 case DIOCWLABEL: 939 if (TRACE_IOCTL) 940 printf(" DIOCWLABEL: Set write access to disklabel.\n"); 941 result = ((flags & FWRITE) == 0) ? EBADF : 0; 942 943 if (result == 0) 944 fd->writeLabel = *(int *)data; 945 break; 946 947 case DIOCSBAD: 948 if (TRACE_IOCTL) 949 printf(" DIOCSBAD: No bad144-style handling.\n"); 950 result = EINVAL; 951 break; 952 953 case ODIOCEJECT: 954 case DIOCEJECT: 955 /* XXX Eject disk only when unlocked */ 956 if (TRACE_IOCTL) 957 printf(" DIOCEJECT: Eject disk from unit %d.\n", 958 fd->unit); 959 result = iwmDiskEject(fd->unit); 960 break; 961 962 case DIOCLOCK: 963 /* XXX Use lock to prevent ejectimg a mounted disk */ 964 if (TRACE_IOCTL) 965 printf(" DIOCLOCK: No need to (un)lock Sony drive.\n"); 966 result = 0; 967 break; 968 969 default: 970 if (TRACE_IOCTL) 971 printf(" Not a disk related ioctl!\n"); 972 result = ENOTTY; 973 break; 974 } 975 return result; 976 } 977 978 979 /* 980 * fddump -- We don't dump to a floppy disk. 981 */ 982 int 983 fddump(dev, blkno, va, size) 984 dev_t dev; 985 daddr_t blkno; 986 caddr_t va; 987 size_t size; 988 { 989 return ENXIO; 990 } 991 992 993 /* 994 * fdsize -- We don't dump to a floppy disk. 995 */ 996 int 997 fdsize(dev) 998 dev_t dev; 999 { 1000 return -1; 1001 } 1002 1003 1004 /* 1005 * fdread 1006 */ 1007 int 1008 fdread(dev, uio, flags) 1009 dev_t dev; 1010 struct uio *uio; 1011 int flags; 1012 { 1013 return physio(fdstrategy, NULL, dev, B_READ, minphys, uio); 1014 } 1015 1016 1017 /* 1018 * fdwrite 1019 */ 1020 int 1021 fdwrite(dev, uio, flags) 1022 dev_t dev; 1023 struct uio *uio; 1024 int flags; 1025 { 1026 return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio); 1027 } 1028 1029 1030 /* 1031 * fdstrategy 1032 * 1033 * Entry point for read and write requests. The strategy routine usually 1034 * queues io requests and kicks off the next transfer if the device is idle; 1035 * but we get no interrupts from the IWM and have to do synchronous 1036 * transfers - no queue. 1037 */ 1038 void 1039 fdstrategy(bp) 1040 struct buf *bp; 1041 { 1042 int fdUnit, err, done, spl; 1043 int sectSize, transferSize; 1044 diskPosition_t physDiskLoc; 1045 fd_softc_t *fd; 1046 #ifndef _LKM 1047 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1048 #endif 1049 1050 err = 0; 1051 done = 0; 1052 1053 fdUnit = minor(bp->b_dev) / MAXPARTITIONS; 1054 if (TRACE_STRAT) { 1055 printf("iwm: fdstrategy()...\n"); 1056 printf(" struct buf is at %p\n", bp); 1057 printf(" Allocated buffer size (b_bufsize): 0x0%lx\n", 1058 bp->b_bufsize); 1059 printf(" Base address of buffer (b_un.b_addr): %p\n", 1060 bp->b_un.b_addr); 1061 printf(" Bytes to be transferred (b_bcount): 0x0%lx\n", 1062 bp->b_bcount); 1063 printf(" Remaining I/O (b_resid): 0x0%lx\n", 1064 bp->b_resid); 1065 } 1066 /* Check for valid fd unit, controller and io request */ 1067 1068 if (fdUnit >= iwm->drives) { 1069 if (TRACE_STRAT) 1070 printf(" No such unit (%d)\n", fdUnit); 1071 err = EINVAL; 1072 } 1073 if (!err) { 1074 fd = iwm->fd[fdUnit]; 1075 err = (NULL == fd) ? EINVAL : 0; 1076 } 1077 if (!err) { 1078 sectSize = fd->currentType->sectorSize; 1079 if (bp->b_blkno < 0 1080 || (bp->b_bcount % sectSize) != 0) { 1081 if (TRACE_STRAT) 1082 printf(" Illegal transfer size: " 1083 "block %d, %ld bytes\n", 1084 bp->b_blkno, bp->b_bcount); 1085 err = EINVAL; 1086 } 1087 } 1088 if (!err) { 1089 /* Null transfer: Return, nothing to do. */ 1090 if (0 == bp->b_bcount) { 1091 if (TRACE_STRAT) 1092 printf(" Zero transfer length.\n"); 1093 done = 1; 1094 } 1095 } 1096 if (!err && !done) { 1097 /* What to do if we touch the boundaries of the disk? */ 1098 transferSize = (bp->b_bcount + (sectSize - 1)) / sectSize; 1099 if (bp->b_blkno + transferSize > fd->currentType->secPerDisk) { 1100 if (TRACE_STRAT) { 1101 printf("iwm: Transfer beyond end of disk!\n" \ 1102 " (Starting block %d, # of blocks %d," \ 1103 " last disk block %d).\n", 1104 bp->b_blkno, transferSize, 1105 fd->currentType->secPerDisk); 1106 } 1107 /* Return EOF if we are exactly at the end of the 1108 * disk, EINVAL if we try to reach past the end; else 1109 * truncate the request. */ 1110 transferSize = fd->currentType->secPerDisk - 1111 bp->b_blkno; 1112 if (0 == transferSize) { 1113 bp->b_resid = bp->b_bcount; 1114 done = 1; 1115 } else 1116 if (0 > transferSize) 1117 err = EINVAL; 1118 else 1119 bp->b_bcount = transferSize << DEV_BSHIFT; 1120 } 1121 } 1122 if (!err && !done) { 1123 /* 1124 * Calculate cylinder # for disksort(). 1125 * 1126 * XXX Shouldn't we use the (fake) logical cyl no here? 1127 */ 1128 remap_geometry(bp->b_blkno, fd->currentType->heads, 1129 &physDiskLoc); 1130 bp->b_rawblkno = bp->b_blkno; 1131 bp->b_cylinder = physDiskLoc.track; 1132 1133 if (TRACE_STRAT) { 1134 printf(" This job starts at b_blkno %d; ", 1135 bp->b_blkno); 1136 printf("it gets sorted for cylinder # %ld.\n", 1137 bp->b_cylinder); 1138 } 1139 spl = splbio(); 1140 callout_stop(&fd->motor_ch); 1141 disksort_cylinder(&fd->bufQueue, bp); 1142 if (fd->sc_active == 0) 1143 fdstart(fd); 1144 splx(spl); 1145 } 1146 /* Clean up, if necessary */ 1147 else { 1148 if (TRACE_STRAT) 1149 printf(" fdstrategy() finished early, err = %d.\n", 1150 err); 1151 if (err) { 1152 bp->b_error = err; 1153 bp->b_flags |= B_ERROR; 1154 } 1155 bp->b_resid = bp->b_bcount; 1156 biodone(bp); 1157 } 1158 /* Comment on results */ 1159 if (TRACE_STRAT) { 1160 printf("iwm: fdstrategy() done.\n"); 1161 printf(" We have b_resid = %ld bytes left, " \ 1162 "b_error is %d;\n", bp->b_resid, bp->b_error); 1163 printf(" b_flags are 0x0%lx.\n", bp->b_flags); 1164 } 1165 } 1166 1167 1168 1169 /* ======================================================================== */ 1170 1171 1172 /* 1173 * fdstart 1174 * 1175 * we are called from the strategy() routine to perform a data transfer. 1176 * 1177 * The disk(9) framework demands we run at splbio(); our caller 1178 * takes care of that. 1179 * 1180 * Wish we had pascalish local functions here... 1181 */ 1182 1183 /* fdstart FSM states */ 1184 enum { 1185 state_Init = 0, 1186 state_Seek, 1187 state_Read, 1188 state_Write, 1189 state_Flush, 1190 state_IOFinish, 1191 state_IOErr, 1192 state_Fault, 1193 state_Exit, 1194 state_Done 1195 }; 1196 1197 static void 1198 fdstart(fd) 1199 fd_softc_t *fd; 1200 { 1201 int st; 1202 1203 static char *stateDesc[] = { 1204 "Init", 1205 "Seek", 1206 "Read", 1207 "Write", 1208 "Flush", 1209 "IOFinish", 1210 "IOErr", 1211 "Fault", 1212 "Exit", 1213 "Done" 1214 }; 1215 int (*state[])(fd_softc_t *fd) = { 1216 fdstart_Init, 1217 fdstart_Seek, 1218 fdstart_Read, 1219 fdstart_Write, 1220 fdstart_Flush, 1221 fdstart_IOFinish, 1222 fdstart_IOErr, 1223 fdstart_Fault, 1224 fdstart_Exit 1225 }; 1226 1227 st = state_Init; 1228 do { 1229 if (TRACE_STRAT) 1230 printf(" fdstart state %d [%s] ", 1231 st, stateDesc[st]); 1232 1233 st = (*state[st])(fd); 1234 1235 if (TRACE_STRAT) 1236 printf(".\n"); 1237 } while (st != state_Done); 1238 } 1239 1240 1241 /* 1242 * fdstart_Init 1243 * 1244 * Set up things 1245 */ 1246 static int 1247 fdstart_Init(fd) 1248 fd_softc_t *fd; 1249 { 1250 struct buf *bp; 1251 1252 /* 1253 * Get the first entry from the queue. This is the buf we gave to 1254 * fdstrategy(); disksort() put it into our softc. 1255 */ 1256 bp = BUFQ_FIRST(&fd->bufQueue); 1257 if (NULL == bp) { 1258 if (TRACE_STRAT) 1259 printf("Queue empty: Nothing to do"); 1260 return state_Done; 1261 } 1262 fd->ioDirection = bp->b_flags & B_READ; 1263 1264 disk_busy(&fd->diskInfo); 1265 if (!(fd->state & IWM_FD_MOTOR_ON)) { 1266 iwmMotor(fd->unit, 1); 1267 fd->state |= IWM_FD_MOTOR_ON; 1268 } 1269 fd->current_buffer = bp->b_un.b_addr; 1270 1271 /* XXX - assumes blocks of 512 bytes */ 1272 fd->startBlk = bp->b_blkno; 1273 1274 fd->iwmErr = 0; 1275 fd->ioRetries = 0; /* XXX */ 1276 fd->seekRetries = 0; 1277 fd->bytesDone = 0; 1278 fd->bytesLeft = bp->b_bcount; 1279 return state_Seek; 1280 } 1281 1282 1283 /* 1284 * fdstart_Seek 1285 */ 1286 static int 1287 fdstart_Seek(fd) 1288 fd_softc_t *fd; 1289 { 1290 int state; 1291 1292 /* Calculate the side/track/sector our block is at. */ 1293 if (TRACE_STRAT) 1294 printf(" Remap block %d ", fd->startBlk); 1295 remap_geometry(fd->startBlk, 1296 fd->currentType->heads, &fd->pos); 1297 if (TRACE_STRAT) 1298 printf("to c%d_h%d_s%d ", fd->pos.track, 1299 fd->pos.side, fd->pos.sector); 1300 1301 if (fd->cachedSide != fd->pos.side) { 1302 if (TRACE_STRAT) 1303 printf(" (invalidate cache) "); 1304 invalidateCylinderCache(fd); 1305 fd->cachedSide = fd->pos.side; 1306 } 1307 1308 /* 1309 * If necessary, seek to wanted track. Note that 1310 * seek() performs any necessary retries. 1311 */ 1312 if (fd->pos.track != fd->pos.oldTrack && 1313 0 != (fd->iwmErr = seek(fd, IWM_SEEK_VANILLA))) { 1314 state = state_Fault; 1315 } else { 1316 state = (fd->ioDirection == IWM_WRITE) 1317 ? state_Write : state_Read; 1318 } 1319 return state; 1320 } 1321 1322 1323 /* 1324 * fdstart_Read 1325 * 1326 * Transfer a sector from disk. Get it from the track cache, if available; 1327 * otherwise, while we are at it, store in the cache all the sectors we find 1328 * on the way. 1329 * 1330 * Track buffering reads: 1331 * o Look if the sector is already cached. 1332 * o Else, read sectors into track cache until we meet the header of 1333 * the sector we want. 1334 * o Read that sector directly to fs buffer and return. 1335 */ 1336 static int 1337 fdstart_Read(fd) 1338 fd_softc_t *fd; 1339 { 1340 int i; 1341 diskPosition_t *pos; 1342 sectorHdr_t *shdr; 1343 #ifndef _LKM 1344 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1345 #endif 1346 1347 /* Initialize retry counters */ 1348 fd->seekRetries = 0; 1349 fd->sectRetries = 0; 1350 pos = &fd->pos; 1351 shdr = &fd->sHdr; 1352 1353 if (TRACE_STRAT) 1354 printf("<%s c%d_h%d_s%d> ", 1355 fd->ioDirection ? "Read" : "Write", 1356 pos->track, pos->side, pos->sector); 1357 1358 /* Sector already cached? */ 1359 i = pos->sector; 1360 if (fd->r_slots[i].valid) { 1361 if (TRACE_STRAT) 1362 printf("(cached)"); 1363 memcpy(fd->current_buffer, fd->r_slots[i].secbuf, 1364 fd->currentType->sectorSize); 1365 return state_IOFinish; 1366 } 1367 1368 /* Get sector from disk */ 1369 shdr->side = pos->side; 1370 shdr->sector = pos->sector; 1371 shdr->track = pos->track; 1372 1373 (void)iwmSelectSide(pos->side); 1374 fd->iwmErr = iwmReadSector(&fd->sHdr, fd->r_slots, 1375 fd->current_buffer); 1376 1377 /* Check possible error conditions */ 1378 if (TRACE_STRAT) 1379 printf("c%d_h%d_s%d_err(%d)_sr%d ", 1380 shdr->track, shdr->side >> 3, 1381 shdr->sector, fd->iwmErr, fd->sectRetries); 1382 1383 /* IWM IO error? */ 1384 if (fd->iwmErr != 0) 1385 return state_IOErr; 1386 1387 /* Bad seek? Retry */ 1388 if (shdr->track != pos->track) { 1389 if (TRACE_STRAT) { 1390 printf("Wanted track %d, got %d, %d seek retries.\n", 1391 pos->track, shdr->track, fd->seekRetries); 1392 } 1393 if (iwm->maxRetries > fd->seekRetries++) { 1394 fd->iwmErr = seek(fd, IWM_SEEK_RECAL); 1395 if (TRACE_STRAT) { 1396 printf("[%d]", fd->seekRetries); 1397 (void)checkTrack(&fd->pos, 1); 1398 } 1399 } else 1400 fd->iwmErr = seekErr; 1401 return (0 == fd->iwmErr) ? state_Read : state_Fault; 1402 } 1403 1404 /* Sector not found? */ 1405 if (shdr->sector != pos->sector) { 1406 if (TRACE_STRAT) 1407 printf("c%d_h%d_s%d sect not found, %d retries ", 1408 shdr->track, shdr->side >> 3, 1409 shdr->sector, fd->sectRetries); 1410 fd->iwmErr = noAdrMkErr; 1411 return state_Fault; 1412 } 1413 1414 /* Success */ 1415 return state_IOFinish; 1416 } 1417 1418 1419 /* 1420 * fdstart_Write 1421 * 1422 * Insert a sector into a write buffer slot and mark the slot dirty. 1423 */ 1424 static int 1425 fdstart_Write(fd) 1426 fd_softc_t *fd; 1427 { 1428 int i; 1429 1430 /* XXX let's see... */ 1431 fd->sHdr.side = fd->pos.side; 1432 fd->sHdr.sector = fd->pos.sector; 1433 fd->sHdr.track = fd->pos.track; 1434 1435 i = fd->pos.sector; 1436 fd->w_slots[i].secbuf = fd->current_buffer; 1437 fd->w_slots[i].valid = 1; /* "valid" is a dirty buffer here */ 1438 1439 if (TRACE_STRAT) 1440 printf("<%s c%d_h%d_s%d> (cached) ", 1441 fd->ioDirection ? "Read" : "Write", 1442 fd->pos.track, fd->pos.side, fd->pos.sector); 1443 return state_IOFinish; 1444 } 1445 1446 1447 1448 /* 1449 * fdstart_Flush 1450 * 1451 * Flush dirty buffers in the track cache to disk. 1452 */ 1453 static int 1454 fdstart_Flush(fd) 1455 fd_softc_t *fd; 1456 { 1457 int state; 1458 int i, dcnt; 1459 diskPosition_t *pos; 1460 sectorHdr_t *shdr; 1461 #ifndef _LKM 1462 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1463 #endif 1464 dcnt = 0; 1465 pos = &fd->pos; 1466 shdr = &fd->sHdr; 1467 1468 if (TRACE_STRAT) { 1469 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) 1470 if (fd->w_slots[i].valid) { 1471 printf("|%d", i); 1472 dcnt++; 1473 } 1474 printf("|\n"); 1475 1476 printf(" <%s c%d_h%d_#s%d>\n", 1477 fd->ioDirection ? "Read" : "Write", 1478 pos->track, pos->side, dcnt); 1479 } 1480 (void)iwmSelectSide(pos->side); 1481 fd->iwmErr = iwmWriteSector(&fd->sHdr, fd->w_slots); 1482 1483 switch (fd->iwmErr) { 1484 case noErr: /* Success */ 1485 #ifdef DIAGNOSTIC 1486 /* XXX Panic if buffer not clean? */ 1487 for (i=0; i<IWM_MAX_GCR_SECTORS; i++) 1488 if (0 != fd->w_slots[i].valid) 1489 printf("Oops! <c%d_h%d_s%d> not flushed.\n", 1490 fd->pos.track, fd->pos.side, 1491 fd->pos.sector); 1492 #endif 1493 if (TRACE_STRAT) 1494 printf("(Cache flushed, re-initialize) "); 1495 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) { 1496 fd->w_slots[i].valid = 0; 1497 fd->w_slots[i].secbuf = NULL; 1498 } 1499 fd->seekRetries = 0; 1500 state = state_Exit; 1501 break; 1502 1503 case seekErr: /* Bad seek? Retry */ 1504 if (TRACE_STRAT) { 1505 printf("Wanted track %d, got %d, %d seek retries.\n", 1506 pos->track, shdr->track, fd->seekRetries); 1507 } 1508 if (iwm->maxRetries > fd->seekRetries++) { 1509 fd->iwmErr = seek(fd, IWM_SEEK_RECAL); 1510 if (TRACE_STRAT) { 1511 printf("[%d]", fd->seekRetries); 1512 } 1513 } 1514 state = (0 == fd->iwmErr) ? state_Exit : state_Fault; 1515 break; 1516 1517 default: /* General IWM IO error? */ 1518 state = state_IOErr; 1519 } 1520 return state; 1521 } 1522 1523 1524 /* 1525 * fdstart_IOFinish 1526 * 1527 * Prepare for next block, if any is available 1528 */ 1529 static int 1530 fdstart_IOFinish(fd) 1531 fd_softc_t *fd; 1532 { 1533 int state; 1534 1535 if (DISABLED && TRACE_STRAT) 1536 printf("%s c%d_h%d_s%d ok ", 1537 fd->ioDirection ? "Read" : "Write", 1538 fd->sHdr.track, fd->sHdr.side >> 3, fd->sHdr.sector); 1539 1540 fd->bytesDone += fd->currentType->sectorSize; 1541 fd->bytesLeft -= fd->currentType->sectorSize; 1542 fd->current_buffer += fd->currentType->sectorSize; 1543 /* 1544 * Instead of recalculating the chs mapping for 1545 * each and every sector, check for 1546 * 'current sector# <= max sector#' and recalculate 1547 * after overflow. 1548 */ 1549 fd->startBlk++; 1550 if (fd->bytesLeft > 0) { 1551 if (++fd->pos.sector < fd->pos.maxSect) { 1552 if (TRACE_STRAT) 1553 printf("continue"); 1554 state = (fd->ioDirection == IWM_WRITE) 1555 ? state_Write : state_Read; 1556 } 1557 else { 1558 /* 1559 * Invalidate read cache when changing track; 1560 * flush write cache to disk. 1561 */ 1562 if (fd->ioDirection == IWM_WRITE) { 1563 if (TRACE_STRAT) 1564 printf("flush "); 1565 state = (state_Exit == fdstart_Flush(fd)) 1566 ? state_Seek : state_IOErr; 1567 } 1568 else { 1569 if (TRACE_STRAT) 1570 printf("step "); 1571 invalidateCylinderCache(fd); 1572 state = state_Seek; 1573 } 1574 } 1575 } else { 1576 state = (fd->ioDirection == IWM_WRITE) 1577 ? state_Flush : state_Exit; 1578 } 1579 return state; 1580 } 1581 1582 1583 /* 1584 * fdstart_IOErr 1585 * 1586 * Bad IO, repeat 1587 */ 1588 static int 1589 fdstart_IOErr(fd) 1590 fd_softc_t *fd; 1591 { 1592 int state; 1593 #ifndef _LKM 1594 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1595 #endif 1596 1597 #ifdef DIAGNOSTIC 1598 printf("iwm%sSector() err = %d, %d retries, on c%d_h%d_s%d.\n", 1599 fd->ioDirection ? "Read" : "Write", 1600 fd->iwmErr, fd->ioRetries, fd->pos.track, 1601 fd->pos.side, fd->pos.sector); 1602 #endif 1603 /* XXX Do statistics */ 1604 if (fd->ioRetries++ < iwm->maxRetries) 1605 state = (fd->ioDirection == IWM_WRITE) 1606 ? state_Flush : state_Read; 1607 else 1608 state = state_Fault; 1609 return state; 1610 } 1611 1612 1613 /* 1614 * fdstart_Fault 1615 * 1616 * A non-recoverable error 1617 */ 1618 static int 1619 fdstart_Fault(fd) 1620 fd_softc_t *fd; 1621 { 1622 #ifdef DIAGNOSTIC 1623 printf("Seek retries %d, IO retries %d, sect retries %d :\n" \ 1624 "\t\t only found c%d_h%d_s%d \n", 1625 fd->seekRetries, fd->ioRetries, fd->sectRetries, 1626 fd->sHdr.track, fd->sHdr.side >> 3, fd->sHdr.sector); 1627 printf("A non-recoverable error: %d ", fd->iwmErr); 1628 #else 1629 /* ARGSUSED */ 1630 #endif 1631 return state_Exit; 1632 } 1633 1634 1635 /* 1636 * fdstart_Exit 1637 * 1638 * We are done, for good or bad 1639 */ 1640 static int 1641 fdstart_Exit(fd) 1642 fd_softc_t *fd; 1643 { 1644 struct buf *bp; 1645 #ifdef DIAGNOSTIC 1646 int i; 1647 #endif 1648 1649 invalidateCylinderCache(fd); 1650 1651 #ifdef DIAGNOSTIC 1652 /* XXX Panic if buffer not clean? */ 1653 for (i=0; i<IWM_MAX_GCR_SECTORS; i++) 1654 if (0 != fd->w_slots[i].valid) 1655 printf("Oops! <c%d_h%d_s%d> not flushed.\n", 1656 fd->pos.track, fd->pos.side, fd->pos.sector); 1657 #endif 1658 1659 bp = BUFQ_FIRST(&fd->bufQueue); 1660 1661 bp->b_resid = fd->bytesLeft; 1662 bp->b_error = (0 == fd->iwmErr) ? 0 : EIO; 1663 if (fd->iwmErr) 1664 bp->b_flags |= B_ERROR; 1665 1666 if (TRACE_STRAT) { 1667 printf(" fdstart() finished job; fd->iwmErr = %d, b_error = %d", 1668 fd->iwmErr, bp->b_error); 1669 if (DISABLED) 1670 hexDump(bp->b_un.b_addr, bp->b_bcount); 1671 } 1672 /* 1673 * Remove requested buf from beginning of queue 1674 * and release it. 1675 */ 1676 BUFQ_REMOVE(&fd->bufQueue, bp); 1677 if (DISABLED && TRACE_STRAT) 1678 printf(" Next buf (bufQueue first) at %p\n", 1679 BUFQ_FIRST(&fd->bufQueue)); 1680 disk_unbusy(&fd->diskInfo, bp->b_bcount - bp->b_resid); 1681 biodone(bp); 1682 /* 1683 * Stop motor after 10s 1684 * 1685 * XXX Unloading the module while the timeout is still 1686 * running WILL crash the machine. 1687 */ 1688 callout_reset(&fd->motor_ch, 10 * hz, motor_off, fd); 1689 1690 return state_Done; 1691 } 1692 1693 1694 /* 1695 * remap_geometry 1696 * 1697 * Remap the rigid UN*X view of a disk's cylinder/sector geometry 1698 * to our zone recorded real Sony drive by splitting the disk 1699 * into zones. 1700 * 1701 * Loop { 1702 * Look if logical block number is in current zone 1703 * NO: Add # of tracks for current zone to track counter 1704 * Process next zone 1705 * 1706 * YES: Subtract (number of first sector of current zone times heads) 1707 * from logical block number, then break up the difference 1708 * in tracks/side/sectors (spt is constant within a zone). 1709 * Done 1710 * } 1711 */ 1712 static void 1713 remap_geometry(block, heads, loc) 1714 daddr_t block; 1715 int heads; 1716 diskPosition_t *loc; 1717 { 1718 int zone, spt; 1719 extern diskZone_t diskZones[]; 1720 1721 spt = 0; /* XXX Shut up egcs warning */ 1722 loc->oldTrack = loc->track; 1723 loc->track = 0; 1724 1725 for (zone = 0; zone < IWM_GCR_DISK_ZONES; zone++) { 1726 if (block >= heads * (diskZones[zone].lastBlock + 1)) { 1727 /* Process full zones */ 1728 loc->track += diskZones[zone].tracks; 1729 } else { 1730 /* Process partial zone */ 1731 spt = diskZones[zone].sectPerTrack; 1732 block -= heads * diskZones[zone].firstBlock; 1733 loc->track += block / (spt * heads); 1734 loc->sector = (block % spt); 1735 loc->side = (block % (spt * heads)) / spt; 1736 break; 1737 } 1738 } 1739 loc->maxSect = spt; 1740 } 1741 1742 1743 /* 1744 * motor_off 1745 * 1746 * Callback for timeout() 1747 */ 1748 static void 1749 motor_off(param) 1750 void *param; 1751 { 1752 int spl; 1753 fd_softc_t *fd; 1754 1755 fd = (fd_softc_t *)param; 1756 if (TRACE_STRAT) 1757 printf("iwm: Switching motor OFF (timeout).\n"); 1758 spl = spl6(); 1759 (void)iwmMotor(fd->unit, 0); 1760 fd->state &= ~IWM_FD_MOTOR_ON; 1761 splx(spl); 1762 } 1763 1764 1765 /* 1766 * fdGetDiskLabel 1767 * 1768 * Set up disk label with parameters from current disk type. 1769 * Then call the generic disklabel read routine which tries to 1770 * read a label from disk and insert it. If it doesn't exist use 1771 * our defaults. 1772 */ 1773 static void 1774 fdGetDiskLabel(fd, dev) 1775 fd_softc_t *fd; 1776 dev_t dev; 1777 { 1778 char *msg; 1779 int fdType; 1780 struct disklabel *lp; 1781 struct cpu_disklabel *clp; 1782 1783 if (TRACE_IOCTL) 1784 printf("iwm: fdGetDiskLabel() for disk %d.\n", 1785 minor(dev) / MAXPARTITIONS); 1786 fdType = minor(dev) % MAXPARTITIONS; 1787 lp = fd->diskInfo.dk_label; 1788 clp = fd->diskInfo.dk_cpulabel; 1789 memset(lp, 0, sizeof(struct disklabel)); 1790 memset(clp, 0, sizeof(struct cpu_disklabel)); 1791 /* 1792 * How to describe a drive with a variable # of sectors per 1793 * track (8..12) and variable rpm (300..550)? Apple came up 1794 * with ZBR in 1983! Un*x drive management sucks. 1795 */ 1796 lp->d_type = DTYPE_FLOPPY; 1797 lp->d_rpm = 300; 1798 lp->d_secsize = fd->currentType->sectorSize; 1799 lp->d_ntracks = fd->currentType->heads; 1800 lp->d_ncylinders = fd->currentType->tracks; 1801 lp->d_nsectors = fd->currentType->secPerTrack; 1802 lp->d_secpercyl = fd->currentType->secPerCyl; 1803 lp->d_secperunit = fd->currentType->secPerDisk; 1804 lp->d_interleave = fd->currentType->interleave; 1805 lp->d_trkseek = fd->currentType->stepRate; 1806 1807 strcpy(lp->d_typename, dktypenames[DTYPE_FLOPPY]); 1808 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1809 1810 lp->d_npartitions = fdType + 1; 1811 lp->d_partitions[fdType].p_offset = 0; 1812 lp->d_partitions[fdType].p_size = lp->d_secperunit; 1813 lp->d_partitions[fdType].p_fstype = FS_BSDFFS; 1814 lp->d_partitions[fdType].p_fsize = 512; 1815 lp->d_partitions[fdType].p_frag = 8; 1816 1817 lp->d_magic = DISKMAGIC; 1818 lp->d_magic2 = DISKMAGIC; 1819 lp->d_checksum = dkcksum(lp); 1820 /* 1821 * Call the generic disklabel extraction routine. If we don't 1822 * find a label on disk, keep our faked one. 1823 */ 1824 if (TRACE_OPEN) 1825 printf(" now calling readdisklabel()...\n"); 1826 1827 msg = readdisklabel(dev, fdstrategy, lp, clp); 1828 if (msg == NULL) { 1829 strncpy(lp->d_packname, "default label", 1830 sizeof(lp->d_packname)); /* XXX - ?? */ 1831 } 1832 #ifdef IWM_DEBUG 1833 else 1834 printf("iwm: %s.\n", msg); 1835 #endif 1836 if (TRACE_OPEN) 1837 fdPrintDiskLabel(lp); 1838 } 1839 1840 1841 1842 /* 1843 * initCylinderCache 1844 * 1845 * Allocate cylinder cache and set up pointers to sectors. 1846 */ 1847 static int 1848 initCylinderCache(fd) 1849 fd_softc_t *fd; 1850 { 1851 int i; 1852 int err; 1853 int secsize; 1854 1855 err = 0; 1856 secsize = fd->currentType->sectorSize; 1857 fd->cachedSide = 0; 1858 1859 fd->cbuf = (unsigned char *) malloc(IWM_MAX_GCR_SECTORS 1860 * secsize, M_DEVBUF, M_WAITOK); 1861 if (NULL == fd->cbuf) 1862 err = ENOMEM; 1863 else 1864 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) { 1865 fd->w_slots[i].valid = 0; 1866 fd->w_slots[i].secbuf = NULL; 1867 1868 fd->r_slots[i].valid = 0; 1869 fd->r_slots[i].secbuf = fd->cbuf + i * secsize; 1870 } 1871 return err; 1872 } 1873 1874 1875 /* 1876 * invalidateCylinderCache 1877 * 1878 * Switching cylinders (tracks?) invalidates the read cache. 1879 */ 1880 static void 1881 invalidateCylinderCache(fd) 1882 fd_softc_t *fd; 1883 { 1884 int i; 1885 1886 fd->cachedSide = 0; 1887 for (i=0; i < IWM_MAX_GCR_SECTORS; i++) { 1888 fd->r_slots[i].valid = 0; 1889 } 1890 } 1891 1892 1893 /* 1894 * getFDType 1895 * 1896 * return pointer to disk format description 1897 */ 1898 static fdInfo_t * 1899 getFDType(unit) 1900 short unit; 1901 { 1902 int driveFlags; 1903 fdInfo_t *thisType; 1904 extern fdInfo_t fdTypes[]; 1905 1906 driveFlags = iwmCheckDrive(unit); 1907 /* 1908 * Drive flags are: Bit 0 - 1 = Drive is double sided 1909 * 1 - 1 = No disk inserted 1910 * 2 - 1 = Motor is off 1911 * 3 - 1 = Disk is writeable 1912 * 4 - 1 = Disk is DD (800/720K) 1913 * 31 - 1 = No drive / invalid drive # 1914 */ 1915 if (TRACE_CONFIG) { 1916 printf("iwm: Drive %d says 0x0%x (%d)\n", 1917 unit, driveFlags, driveFlags); 1918 } 1919 if (driveFlags < 0) 1920 thisType = NULL;/* no such drive */ 1921 else 1922 if (driveFlags & 0x01) 1923 thisType = &fdTypes[1]; /* double sided */ 1924 else 1925 thisType = &fdTypes[0]; /* single sided */ 1926 1927 return thisType; 1928 } 1929 1930 1931 /* 1932 * fdDeviceToType 1933 * 1934 * maps the minor device number (elsewhere: partition type) to 1935 * a corresponding disk format. 1936 * This is currently: 1937 * fdXa default (800K GCR) 1938 * fdXb 400K GCR 1939 * fdXc 800K GCR 1940 */ 1941 static fdInfo_t * 1942 fdDeviceToType(fd, dev) 1943 fd_softc_t *fd; 1944 dev_t dev; 1945 { 1946 int type; 1947 fdInfo_t *thisInfo; 1948 /* XXX This broke with egcs 1.0.2 */ 1949 /* extern fdInfo_t fdTypes[]; */ 1950 1951 type = minor(dev) % MAXPARTITIONS; /* 1,2,... */ 1952 if (type > sizeof(fdTypes) / sizeof(fdTypes[0])) 1953 thisInfo = NULL; 1954 else 1955 thisInfo = (type == 0) ? fd->defaultType : &fdTypes[type - 1]; 1956 return thisInfo; 1957 } 1958 1959 1960 /* 1961 * seek 1962 * 1963 * Step to given track; optionally restore to track zero before 1964 * and/or verify correct track. 1965 * Note that any necessary retries are done here. 1966 * We keep the current position on disk in a 'struct diskPosition'. 1967 */ 1968 static int 1969 seek(fd, style) 1970 fd_softc_t *fd; 1971 int style; 1972 { 1973 int state, done; 1974 int err, ierr; 1975 int steps; 1976 1977 diskPosition_t *loc; 1978 sectorHdr_t hdr; 1979 char action[32]; 1980 #ifndef _LKM 1981 iwm_softc_t *iwm = iwm_cd.cd_devs[0]; 1982 #endif 1983 1984 char *stateDesc[] = { 1985 "Init", 1986 "Seek", 1987 "Recalibrate", 1988 "Verify", 1989 "Exit" 1990 }; 1991 enum { 1992 state_Init = 0, 1993 state_Seek, 1994 state_Recalibrate, 1995 state_Verify, 1996 state_Exit 1997 }; 1998 /* XXX egcs */ 1999 done = err = ierr = 0; 2000 fd->seekRetries = 0; 2001 fd->verifyRetries = 0; 2002 2003 loc = &fd->pos; 2004 2005 state = state_Init; 2006 do { 2007 if (TRACE_STEP) 2008 printf(" seek state %d [%s].\n", 2009 state, stateDesc[state]); 2010 switch (state) { 2011 2012 case state_Init: 2013 if (TRACE_STEP) 2014 printf("Current track is %d, new track %d.\n", 2015 loc->oldTrack, loc->track); 2016 memset(&hdr, 0, sizeof(hdr)); 2017 err = ierr = 0; 2018 fd->seekRetries = 0; 2019 fd->verifyRetries = 0; 2020 state = (style == IWM_SEEK_RECAL) 2021 ? state_Recalibrate : state_Seek; 2022 done = 0; 2023 break; 2024 2025 case state_Recalibrate: 2026 ierr = iwmTrack00(); 2027 if (ierr == 0) { 2028 loc->oldTrack = 0; 2029 state = state_Seek; 2030 } else { 2031 strncpy(action, "Recalibrate (track 0)", 2032 sizeof(action)); 2033 state = state_Exit; 2034 } 2035 break; 2036 2037 case state_Seek: 2038 ierr = 0; 2039 steps = loc->track - loc->oldTrack; 2040 2041 if (steps != 0) 2042 ierr = iwmSeek(steps); 2043 if (ierr == 0) { 2044 /* No error or nothing to do */ 2045 state = (style == IWM_SEEK_VERIFY) 2046 ? state_Verify : state_Exit; 2047 } else { 2048 if (fd->seekRetries++ < iwm->maxRetries) 2049 state = state_Recalibrate; 2050 else { 2051 strncpy(action, "Seek retries", 2052 sizeof(action)); 2053 state = state_Exit; 2054 } 2055 } 2056 break; 2057 2058 case state_Verify: 2059 ierr = checkTrack(loc, TRACE_STEP); 2060 if (ierr == 0 && loc->track == hdr.track) 2061 state = state_Exit; 2062 else { 2063 if (fd->verifyRetries++ < iwm->maxRetries) 2064 state = state_Recalibrate; 2065 else { 2066 strncpy(action, "Verify retries", 2067 sizeof(action)); 2068 state = state_Exit; 2069 } 2070 } 2071 break; 2072 2073 case state_Exit: 2074 if (ierr == 0) { 2075 loc->oldTrack = loc->track; 2076 err = 0; 2077 /* Give the head some time to settle down */ 2078 delay(3000); 2079 } else { 2080 #ifdef DIAGNOSTIC 2081 printf(" seek() action \"%s\", err = %d.\n", 2082 action, ierr); 2083 #endif 2084 err = EIO; 2085 } 2086 done = 1; 2087 break; 2088 } 2089 } while (!done); 2090 return err; 2091 } 2092 2093 2094 /* 2095 * checkTrack 2096 * 2097 * After positioning, get a sector header for validation 2098 */ 2099 static int 2100 checkTrack(loc, debugFlag) 2101 diskPosition_t *loc; 2102 int debugFlag; 2103 { 2104 int spl; 2105 int iwmErr; 2106 sectorHdr_t hdr; 2107 2108 spl = spl6(); 2109 iwmSelectSide(loc->side); 2110 iwmErr = iwmReadSectHdr(&hdr); 2111 splx(spl); 2112 if (debugFlag) { 2113 printf("Seeked for %d, got at %d, Hdr read err %d.\n", 2114 loc->track, hdr.track, iwmErr); 2115 } 2116 return iwmErr; 2117 } 2118 2119 2120 /* Debugging stuff */ 2121 2122 static void 2123 hexDump(buf, len) 2124 u_char *buf; 2125 int len; 2126 { 2127 int i, j; 2128 u_char ch; 2129 2130 printf("\nDump %d from %p:\n", len, buf); 2131 i = j = 0; 2132 if (NULL != buf) do { 2133 printf("%04x: ", i); 2134 for (j = 0; j < 8; j++) 2135 printf("%02x ", buf[i + j]); 2136 printf(" "); 2137 for (j = 8; j < 16; j++) 2138 printf("%02x ", buf[i + j]); 2139 printf(" "); 2140 for (j = 0; j < 16; j++) { 2141 ch = buf[i + j]; 2142 if (ch > 31 && ch < 127) 2143 printf("%c", ch); 2144 else 2145 printf("."); 2146 } 2147 printf("\n"); 2148 i += 16; 2149 } while (len > i); 2150 } 2151 2152 2153 static void 2154 fdPrintDiskLabel(lp) 2155 struct disklabel *lp; 2156 { 2157 int i; 2158 2159 printf("iwm: Disklabel entries of current floppy.\n"); 2160 printf("\t d_type:\t%d (%s)\n", lp->d_type, 2161 dktypenames[lp->d_type]); 2162 printf("\t d_typename:\t%s\n", lp->d_typename); 2163 printf("\t d_packname:\t%s\n", lp->d_packname); 2164 2165 printf("\t d_secsize:\t%d\n", lp->d_secsize); 2166 printf("\t d_nsectors:\t%d\n", lp->d_nsectors); 2167 printf("\t d_ntracks:\t%d\n", lp->d_ntracks); 2168 printf("\t d_ncylinders:\t%d\n", lp->d_ncylinders); 2169 printf("\t d_secpercyl:\t%d\n", lp->d_secpercyl); 2170 printf("\t d_secperunit:\t%d\n", lp->d_secperunit); 2171 2172 printf("\t d_rpm: \t%d\n", lp->d_rpm); 2173 printf("\t d_interleave:\t%d\n", lp->d_interleave); 2174 printf("\t d_trkseek:\t%d [ms]\n", lp->d_trkseek); 2175 2176 printf(" d_npartitions:\t%d\n", lp->d_npartitions); 2177 for (i = 0; i < lp->d_npartitions; i++) { 2178 printf("\t d_partitions[%d].p_offset:\t%d\n", i, 2179 lp->d_partitions[i].p_offset); 2180 printf("\t d_partitions[%d].p_size:\t%d\n", i, 2181 lp->d_partitions[i].p_size); 2182 printf("\t d_partitions[%d].p_fstype:\t%d (%s)\n", i, 2183 lp->d_partitions[i].p_fstype, 2184 fstypenames[lp->d_partitions[i].p_fstype]); 2185 printf("\t d_partitions[%d].p_frag:\t%d\n", i, 2186 lp->d_partitions[i].p_frag); 2187 printf("\n"); 2188 } 2189 } 2190
Indexes created Mon Sep 29 21:09:56 GMT 2025