1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)rl.c 7.10 (Berkeley) 12/16/90 7 */ 8 9 #include "rl.h" 10 #if NRL > 0 11 /* 12 * UNIBUS RL02 disk driver 13 */ 14 #include "../include/pte.h" 15 16 #include "sys/param.h" 17 #include "sys/systm.h" 18 #include "sys/dkstat.h" 19 #include "sys/dkbad.h" 20 #include "sys/ioctl.h" 21 #include "sys/disklabel.h" 22 #include "sys/buf.h" 23 #include "sys/conf.h" 24 #include "sys/user.h" 25 #include "sys/map.h" 26 #include "sys/vm.h" 27 #include "sys/cmap.h" 28 #include "sys/uio.h" 29 #include "sys/kernel.h" 30 #include "sys/syslog.h" 31 32 #include "../include/cpu.h" 33 #include "../vax/nexus.h" 34 #include "ubavar.h" 35 #include "ubareg.h" 36 #include "rlreg.h" 37 38 /* Pending Controller items and statistics */ 39 struct rl_softc { 40 int rl_softas; /* Attention sumary, (seeks pending) */ 41 int rl_ndrive; /* Number of drives on controller */ 42 int rl_wticks; /* Monitor time for function */ 43 } rl_softc[NHL]; 44 45 /* 46 * State of controller from last transfer. 47 * Since only one transfer can be done at a time per 48 * controller, only allocate one for each controller. 49 */ 50 struct rl_stat { 51 short rl_cyl[4]; /* Current cylinder for each drive */ 52 short rl_dn; /* drive number currently transferring */ 53 short rl_cylnhd; /* current cylinder and head of transfer */ 54 u_short rl_bleft; /* bytes left to transfer */ 55 u_short rl_bpart; /* bytes transferred */ 56 } rl_stat[NHL]; 57 58 #define rlunit(dev) (minor(dev) >> 3) 59 60 /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ 61 /* Last cylinder not used. Saved for Bad Sector File */ 62 struct size { 63 daddr_t nblocks; 64 int cyloff; 65 } rl02_sizes[8] = { 66 15884, 0, /* A=cyl 0 thru 397 */ 67 4520, 398, /* B=cyl 398 thru 510 */ 68 -1, 0, /* C=cyl 0 thru 511 */ 69 4520, 398, /* D=cyl 398 thru 510 */ 70 0, 0, /* E= Not Defined */ 71 0, 0, /* F= Not Defined */ 72 20440, 0, /* G=cyl 0 thru 510 */ 73 0, 0, /* H= Not Defined */ 74 }; 75 /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ 76 77 int rlprobe(), rlslave(), rlattach(), rldgo(), rlintr(); 78 struct uba_ctlr *rlminfo[NHL]; 79 struct uba_device *rldinfo[NRL]; 80 struct uba_device *rlip[NHL][4]; 81 82 /* RL02 driver structure */ 83 u_short rlstd[] = { 0174400, 0 }; 84 struct uba_driver hldriver = 85 { rlprobe, rlslave, rlattach, rldgo, rlstd, "rl", rldinfo, "hl", rlminfo }; 86 87 /* User table per controller */ 88 struct buf rlutab[NRL]; 89 90 /* RL02 drive structure */ 91 struct RL02 { 92 short nbpt; /* Number of 512 byte blocks/track */ 93 short ntrak; 94 short nbpc; /* Number of 512 byte blocks/cylinder */ 95 short ncyl; 96 short btrak; /* Number of bytes/track */ 97 struct size *sizes; 98 } rl02 = { 99 20, 2, 40, 512, 20*512, rl02_sizes /* rl02/DEC*/ 100 }; 101 102 #define b_cylin b_resid /* Last seek as CYL<<1 | HD */ 103 104 int rlwstart, rlwatch(); /* Have started guardian */ 105 106 /* Check that controller exists */ 107 /*ARGSUSED*/ 108 rlprobe(reg) 109 caddr_t reg; 110 { 111 register int br, cvec; 112 113 #ifdef lint 114 br = 0; cvec = br; br = cvec; 115 rlintr(0); 116 #endif 117 ((struct rldevice *)reg)->rlcs = RL_IE | RL_NOOP; 118 DELAY(10); 119 ((struct rldevice *)reg)->rlcs &= ~RL_IE; 120 return (sizeof (struct rldevice)); 121 } 122 123 rlslave(ui, reg) 124 struct uba_device *ui; 125 caddr_t reg; 126 { 127 register struct rldevice *rladdr = (struct rldevice *)reg; 128 short ctr = 0; 129 130 /* 131 * DEC reports that: 132 * For some unknown reason the RL02 (seems to be only drive 1) 133 * does not return a valid drive status the first time that a 134 * GET STATUS request is issued for the drive, in fact it can 135 * take up to three or more GET STATUS requests to obtain the 136 * correct status. 137 * In order to overcome this, the driver has been modified to 138 * issue a GET STATUS request and validate the drive status 139 * returned. If a valid status is not returned after eight 140 * attempts, then an error message is printed. 141 */ 142 do { 143 rladdr->rlda.getstat = RL_RESET; 144 rladdr->rlcs = (ui->ui_slave <<8) | RL_GETSTAT; /* Get status*/ 145 rlwait(rladdr); 146 } while ((rladdr->rlcs & (RL_CRDY|RL_ERR)) != RL_CRDY && ++ctr < 8); 147 148 if ((rladdr->rlcs & RL_DE) || (ctr >= 8)) 149 return (0); 150 if ((rladdr->rlmp.getstat & RLMP_DT) == 0 ) { 151 printf("rl%d: rl01's not supported\n", ui->ui_slave); 152 return(0); 153 } 154 return (1); 155 } 156 157 rlattach(ui) 158 register struct uba_device *ui; 159 { 160 register struct rldevice *rladdr; 161 162 if (rlwstart == 0) { 163 timeout(rlwatch, (caddr_t)0, hz); 164 rlwstart++; 165 } 166 /* Initialize iostat values */ 167 if (ui->ui_dk >= 0) 168 dk_wpms[ui->ui_dk] = 256016; /* 16bit transfer time? */ 169 rlip[ui->ui_ctlr][ui->ui_slave] = ui; 170 rl_softc[ui->ui_ctlr].rl_ndrive++; 171 rladdr = (struct rldevice *)ui->ui_addr; 172 /* reset controller */ 173 rladdr->rlda.getstat = RL_RESET; /* SHOULD BE REPEATED? */ 174 rladdr->rlcs = (ui->ui_slave << 8) | RL_GETSTAT; /* Reset DE bit */ 175 rlwait(rladdr); 176 /* determine disk posistion */ 177 rladdr->rlcs = (ui->ui_slave << 8) | RL_RHDR; 178 rlwait(rladdr); 179 /* save disk drive posistion */ 180 rl_stat[ui->ui_ctlr].rl_cyl[ui->ui_slave] = 181 (rladdr->rlmp.readhdr & 0177700) >> 6; 182 rl_stat[ui->ui_ctlr].rl_dn = -1; 183 } 184 185 rlopen(dev) 186 dev_t dev; 187 { 188 register int unit = rlunit(dev); 189 register struct uba_device *ui; 190 191 if (unit >= NRL || (ui = rldinfo[unit]) == 0 || ui->ui_alive == 0) 192 return (ENXIO); 193 return (0); 194 } 195 196 rlstrategy(bp) 197 register struct buf *bp; 198 { 199 register struct uba_device *ui; 200 register int drive; 201 register struct buf *dp; 202 int partition = minor(bp->b_dev) & 07, s; 203 long bn, sz; 204 205 sz = (bp->b_bcount+511) >> 9; 206 drive = rlunit(bp->b_dev); 207 if (drive >= NRL) { 208 bp->b_error = ENXIO; 209 goto bad; 210 } 211 ui = rldinfo[drive]; 212 if (ui == 0 || ui->ui_alive == 0) { 213 bp->b_error = ENXIO; 214 goto bad; 215 } 216 if (bp->b_blkno < 0 || 217 (bn = bp->b_blkno)+sz > rl02.sizes[partition].nblocks) { 218 if (bp->b_blkno == rl02.sizes[partition].nblocks) { 219 bp->b_resid = bp->b_bcount; 220 goto done; 221 } 222 bp->b_error = EINVAL; 223 goto bad; 224 } 225 /* bn is in 512 byte block size */ 226 bp->b_cylin = bn/rl02.nbpc + rl02.sizes[partition].cyloff; 227 s = spl5(); 228 dp = &rlutab[ui->ui_unit]; 229 disksort(dp, bp); 230 if (dp->b_active == 0) { 231 rlustart(ui); 232 bp = &ui->ui_mi->um_tab; 233 if (bp->b_actf && bp->b_active == 0) 234 rlstart(ui->ui_mi); 235 } 236 splx(s); 237 return; 238 239 bad: 240 bp->b_flags |= B_ERROR; 241 done: 242 iodone(bp); 243 return; 244 } 245 246 /* 247 * Unit start routine. 248 * Seek the drive to be where the data is 249 * and then generate another interrupt 250 * to actually start the transfer. 251 */ 252 rlustart(ui) 253 register struct uba_device *ui; 254 { 255 register struct buf *bp, *dp; 256 register struct uba_ctlr *um; 257 register struct rldevice *rladdr; 258 daddr_t bn; 259 short hd, diff; 260 261 if (ui == 0) 262 return; 263 um = ui->ui_mi; 264 dk_busy &= ~(1 << ui->ui_dk); 265 dp = &rlutab[ui->ui_unit]; 266 if ((bp = dp->b_actf) == NULL) 267 return; 268 /* 269 * If the controller is active, just remember 270 * that this device has to be positioned... 271 */ 272 if (um->um_tab.b_active) { 273 rl_softc[um->um_ctlr].rl_softas |= 1<<ui->ui_slave; 274 return; 275 } 276 /* 277 * If we have already positioned this drive, 278 * then just put it on the ready queue. 279 */ 280 if (dp->b_active) 281 goto done; 282 dp->b_active = 1; /* positioning drive */ 283 rladdr = (struct rldevice *)um->um_addr; 284 285 /* 286 * Figure out where this transfer is going to 287 * and see if we are seeked correctly. 288 */ 289 bn = bp->b_blkno; /* Block # desired */ 290 /* 291 * Map 512 byte logical disk blocks 292 * to 256 byte sectors (rl02's are stupid). 293 */ 294 hd = (bn / rl02.nbpt) & 1; /* Get head required */ 295 diff = (rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] >> 1) - bp->b_cylin; 296 if ( diff == 0 && (rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] & 1) == hd) 297 goto done; /* on cylinder and head */ 298 /* 299 * Not at correct position. 300 */ 301 rl_stat[um->um_ctlr].rl_cyl[ui->ui_slave] = (bp->b_cylin << 1) | hd; 302 if (diff < 0) 303 rladdr->rlda.seek = -diff << 7 | RLDA_HGH | hd << 4; 304 else 305 rladdr->rlda.seek = diff << 7 | RLDA_LOW | hd << 4; 306 rladdr->rlcs = (ui->ui_slave << 8) | RL_SEEK; 307 308 /* 309 * Mark unit busy for iostat. 310 */ 311 if (ui->ui_dk >= 0) { 312 dk_busy |= 1<<ui->ui_dk; 313 dk_seek[ui->ui_dk]++; 314 } 315 rlwait(rladdr); 316 done: 317 /* 318 * Device is ready to go. 319 * Put it on the ready queue for the controller 320 * (unless its already there.) 321 */ 322 if (dp->b_active != 2) { 323 dp->b_forw = NULL; 324 if (um->um_tab.b_actf == NULL) 325 um->um_tab.b_actf = dp; 326 else 327 um->um_tab.b_actl->b_forw = dp; 328 um->um_tab.b_actl = dp; 329 dp->b_active = 2; /* Request on ready queue */ 330 } 331 } 332 333 /* 334 * Start up a transfer on a drive. 335 */ 336 rlstart(um) 337 register struct uba_ctlr *um; 338 { 339 register struct buf *bp, *dp; 340 register struct uba_device *ui; 341 register struct rldevice *rladdr; 342 register struct rl_stat *st = &rl_stat[um->um_ctlr]; 343 daddr_t bn; 344 short sn, cyl, cmd; 345 346 loop: 347 if ((dp = um->um_tab.b_actf) == NULL) { 348 st->rl_dn = -1; 349 st->rl_cylnhd = 0; 350 st->rl_bleft = 0; 351 st->rl_bpart = 0; 352 return; 353 } 354 if ((bp = dp->b_actf) == NULL) { 355 um->um_tab.b_actf = dp->b_forw; 356 goto loop; 357 } 358 /* 359 * Mark controller busy, and 360 * determine destination. 361 */ 362 um->um_tab.b_active++; 363 ui = rldinfo[rlunit(bp->b_dev)]; /* Controller */ 364 bn = bp->b_blkno; /* 512 byte Block number */ 365 cyl = bp->b_cylin << 1; /* Cylinder */ 366 cyl |= (bn / rl02.nbpt) & 1; /* Get head required */ 367 sn = (bn % rl02.nbpt) << 1; /* Sector number */ 368 rladdr = (struct rldevice *)ui->ui_addr; 369 rlwait(rladdr); 370 rladdr->rlda.rw = cyl<<6 | sn; 371 /* save away current transfers drive status */ 372 st->rl_dn = ui->ui_slave; 373 st->rl_cylnhd = cyl; 374 st->rl_bleft = bp->b_bcount; 375 st->rl_bpart = rl02.btrak - (sn * NRLBPSC); 376 /* 377 * RL02 must seek between cylinders and between tracks, 378 * determine maximum data transfer at this time. 379 */ 380 if (st->rl_bleft < st->rl_bpart) 381 st->rl_bpart = st->rl_bleft; 382 rladdr->rlmp.rw = -(st->rl_bpart >> 1); 383 if (bp->b_flags & B_READ) 384 cmd = RL_IE | RL_READ | (ui->ui_slave << 8); 385 else 386 cmd = RL_IE | RL_WRITE | (ui->ui_slave << 8); 387 um->um_cmd = cmd; 388 (void) ubago(ui); 389 } 390 391 rldgo(um) 392 register struct uba_ctlr *um; 393 { 394 register struct rldevice *rladdr = (struct rldevice *)um->um_addr; 395 396 rladdr->rlba = um->um_ubinfo; 397 rladdr->rlcs = um->um_cmd|((um->um_ubinfo>>12)&RL_BAE); 398 } 399 400 /* 401 * Handle a disk interrupt. 402 */ 403 rlintr(rl21) 404 register rl21; 405 { 406 register struct buf *bp, *dp; 407 register struct uba_ctlr *um = rlminfo[rl21]; 408 register struct uba_device *ui; 409 register struct rldevice *rladdr = (struct rldevice *)um->um_addr; 410 register unit; 411 struct rl_softc *rl = &rl_softc[um->um_ctlr]; 412 struct rl_stat *st = &rl_stat[um->um_ctlr]; 413 int as = rl->rl_softas, status; 414 415 rl->rl_wticks = 0; 416 rl->rl_softas = 0; 417 dp = um->um_tab.b_actf; 418 bp = dp->b_actf; 419 ui = rldinfo[rlunit(bp->b_dev)]; 420 dk_busy &= ~(1 << ui->ui_dk); 421 422 /* 423 * Check for and process errors on 424 * either the drive or the controller. 425 */ 426 if (rladdr->rlcs & RL_ERR) { 427 u_short err; 428 rlwait(rladdr); 429 err = rladdr->rlcs; 430 /* get staus and reset controller */ 431 rladdr->rlda.getstat = RL_GSTAT; 432 rladdr->rlcs = (ui->ui_slave << 8) | RL_GETSTAT; 433 rlwait(rladdr); 434 status = rladdr->rlmp.getstat; 435 /* reset drive */ 436 rladdr->rlda.getstat = RL_RESET; 437 rladdr->rlcs = (ui->ui_slave <<8) | RL_GETSTAT; /* Get status*/ 438 rlwait(rladdr); 439 if ((status & RLMP_WL) == RLMP_WL) { 440 /* 441 * Give up on write protected devices 442 * immediately. 443 */ 444 printf("rl%d: write protected\n", rlunit(bp->b_dev)); 445 bp->b_flags |= B_ERROR; 446 } else if (++um->um_tab.b_errcnt > 10) { 447 /* 448 * After 10 retries give up. 449 */ 450 diskerr(bp, "rl", "hard error", LOG_PRINTF, -1, 451 (struct disklabel *)0); 452 printf(" cs=%b mp=%b\n", err, RLCS_BITS, 453 status, RLER_BITS); 454 bp->b_flags |= B_ERROR; 455 } else 456 um->um_tab.b_active = 0; /* force retry */ 457 /* determine disk position */ 458 rladdr->rlcs = (ui->ui_slave << 8) | RL_RHDR; 459 rlwait(rladdr); 460 /* save disk drive position */ 461 st->rl_cyl[ui->ui_slave] = 462 (rladdr->rlmp.readhdr & 0177700) >> 6; 463 } 464 /* 465 * If still ``active'', then don't need any more retries. 466 */ 467 if (um->um_tab.b_active) { 468 /* RL02 check if more data from previous request */ 469 if ((bp->b_flags & B_ERROR) == 0 && 470 (int)(st->rl_bleft -= st->rl_bpart) > 0) { 471 /* 472 * The following code was modeled from the rk07 473 * driver when an ECC error occured. It has to 474 * fix the bits then restart the transfer which is 475 * what we have to do (restart transfer). 476 */ 477 int reg, npf, o, cmd, ubaddr, diff, head; 478 479 /* seek to next head/track */ 480 /* increment head and/or cylinder */ 481 st->rl_cylnhd++; 482 diff = (st->rl_cyl[ui->ui_slave] >> 1) - 483 (st->rl_cylnhd >> 1); 484 st->rl_cyl[ui->ui_slave] = st->rl_cylnhd; 485 head = st->rl_cylnhd & 1; 486 rlwait(rladdr); 487 if (diff < 0) 488 rladdr->rlda.seek = 489 -diff << 7 | RLDA_HGH | head << 4; 490 else 491 rladdr->rlda.seek = 492 diff << 7 | RLDA_LOW | head << 4; 493 rladdr->rlcs = (ui->ui_slave << 8) | RL_SEEK; 494 npf = btop( bp->b_bcount - st->rl_bleft ); 495 reg = btop(UBAI_ADDR(um->um_ubinfo)) + npf; 496 o = (int)bp->b_un.b_addr & PGOFSET; 497 ubapurge(um); 498 um->um_tab.b_active++; 499 rlwait(rladdr); 500 rladdr->rlda.rw = st->rl_cylnhd << 6; 501 if (st->rl_bleft < (st->rl_bpart = rl02.btrak)) 502 st->rl_bpart = st->rl_bleft; 503 rladdr->rlmp.rw = -(st->rl_bpart >> 1); 504 cmd = (bp->b_flags&B_READ ? RL_READ : RL_WRITE) | 505 RL_IE | (ui->ui_slave << 8); 506 ubaddr = (int)ptob(reg) + o; 507 cmd |= ((ubaddr >> 12) & RL_BAE); 508 rladdr->rlba = ubaddr; 509 rladdr->rlcs = cmd; 510 return; 511 } 512 um->um_tab.b_active = 0; 513 um->um_tab.b_errcnt = 0; 514 dp->b_active = 0; 515 dp->b_errcnt = 0; 516 /* "b_resid" words remaining after error */ 517 bp->b_resid = st->rl_bleft; 518 um->um_tab.b_actf = dp->b_forw; 519 dp->b_actf = bp->av_forw; 520 st->rl_dn = -1; 521 st->rl_bpart = st->rl_bleft = 0; 522 iodone(bp); 523 /* 524 * If this unit has more work to do, 525 * then start it up right away. 526 */ 527 if (dp->b_actf) 528 rlustart(ui); 529 as &= ~(1<<ui->ui_slave); 530 } else 531 as |= (1<<ui->ui_slave); 532 ubadone(um); 533 /* reset state info */ 534 st->rl_dn = -1; 535 st->rl_cylnhd = st->rl_bpart = st->rl_bleft = 0; 536 /* 537 * Process other units which need attention. 538 * For each unit which needs attention, call 539 * the unit start routine to place the slave 540 * on the controller device queue. 541 */ 542 while (unit = ffs((long)as)) { 543 unit--; /* was 1 origin */ 544 as &= ~(1<<unit); 545 rlustart(rlip[rl21][unit]); 546 } 547 /* 548 * If the controller is not transferring, but 549 * there are devices ready to transfer, start 550 * the controller. 551 */ 552 if (um->um_tab.b_actf && um->um_tab.b_active == 0) 553 rlstart(um); 554 } 555 556 rlwait(rladdr) 557 register struct rldevice *rladdr; 558 { 559 560 while ((rladdr->rlcs & RL_CRDY) == 0) 561 ; 562 } 563 564 /* 565 * Reset driver after UBA init. 566 * Cancel software state of all pending transfers 567 * and restart all units and the controller. 568 */ 569 rlreset(uban) 570 int uban; 571 { 572 register struct uba_ctlr *um; 573 register struct uba_device *ui; 574 register struct rldevice *rladdr; 575 register struct rl_stat *st; 576 register int rl21, unit; 577 578 for (rl21 = 0; rl21 < NHL; rl21++) { 579 if ((um = rlminfo[rl21]) == 0 || um->um_ubanum != uban || 580 um->um_alive == 0) 581 continue; 582 printf(" hl%d", rl21); 583 rladdr = (struct rldevice *)um->um_addr; 584 st = &rl_stat[rl21]; 585 um->um_tab.b_active = 0; 586 um->um_tab.b_actf = um->um_tab.b_actl = 0; 587 if (um->um_ubinfo) { 588 printf("<%d>", (um->um_ubinfo>>28)&0xf); 589 um->um_ubinfo = 0; 590 } 591 /* reset controller */ 592 st->rl_dn = -1; 593 st->rl_cylnhd = 0; 594 st->rl_bleft = 0; 595 st->rl_bpart = 0; 596 rlwait(rladdr); 597 for (unit = 0; unit < NRL; unit++) { 598 rladdr->rlcs = (unit << 8) | RL_GETSTAT; 599 rlwait(rladdr); 600 /* Determine disk posistion */ 601 rladdr->rlcs = (unit << 8) | RL_RHDR; 602 rlwait(rladdr); 603 /* save disk drive posistion */ 604 st->rl_cyl[unit] = 605 (rladdr->rlmp.readhdr & 0177700) >> 6; 606 if ((ui = rldinfo[unit]) == 0) 607 continue; 608 if (ui->ui_alive == 0 || ui->ui_mi != um) 609 continue; 610 rlutab[unit].b_active = 0; 611 rlustart(ui); 612 } 613 rlstart(um); 614 } 615 } 616 617 /* 618 * Wake up every second and if an interrupt is pending 619 * but nothing has happened increment a counter. 620 * If nothing happens for 20 seconds, reset the UNIBUS 621 * and begin anew. 622 */ 623 rlwatch() 624 { 625 register struct uba_ctlr *um; 626 register rl21, unit; 627 register struct rl_softc *rl; 628 629 timeout(rlwatch, (caddr_t)0, hz); 630 for (rl21 = 0; rl21 < NHL; rl21++) { 631 um = rlminfo[rl21]; 632 if (um == 0 || um->um_alive == 0) 633 continue; 634 rl = &rl_softc[rl21]; 635 if (um->um_tab.b_active == 0) { 636 for (unit = 0; unit < NRL; unit++) 637 if (rlutab[unit].b_active && 638 rldinfo[unit]->ui_mi == um) 639 goto active; 640 rl->rl_wticks = 0; 641 continue; 642 } 643 active: 644 rl->rl_wticks++; 645 if (rl->rl_wticks >= 20) { 646 rl->rl_wticks = 0; 647 printf("hl%d: lost interrupt\n", rl21); 648 ubareset(um->um_ubanum); 649 } 650 } 651 } 652 653 /*ARGSUSED*/ 654 rldump(dev) 655 dev_t dev; 656 { 657 658 /* don't think there is room on swap for it anyway. */ 659 } 660 661 rlsize(dev) 662 dev_t dev; 663 { 664 register int unit = rlunit(dev); 665 register struct uba_device *ui; 666 667 if (unit >= NRL || (ui = rldinfo[unit]) == 0 || ui->ui_alive == 0) 668 return (-1); 669 return (rl02.sizes[minor(dev) & 07].nblocks); 670 } 671 #endif 672