| | 1 | #define UPECCDEBUG |
| | 2 | /* up.c 4.43 82/03/24 */ |
| | 3 | |
| | 4 | #include "up.h" |
| | 5 | #if NSC > 0 |
| | 6 | /* |
| | 7 | * UNIBUS disk driver with overlapped seeks and ECC recovery. |
| | 8 | * |
| | 9 | * TODO: |
| | 10 | * Add bad sector forwarding code |
| | 11 | * Check that offset recovery code works |
| | 12 | */ |
| | 13 | |
| | 14 | #include "../h/param.h" |
| | 15 | #include "../h/systm.h" |
| | 16 | #include "../h/cpu.h" |
| | 17 | #include "../h/nexus.h" |
| | 18 | #include "../h/dk.h" |
| | 19 | #include "../h/buf.h" |
| | 20 | #include "../h/conf.h" |
| | 21 | #include "../h/dir.h" |
| | 22 | #include "../h/user.h" |
| | 23 | #include "../h/map.h" |
| | 24 | #include "../h/pte.h" |
| | 25 | #include "../h/mtpr.h" |
| | 26 | #include "../h/vm.h" |
| | 27 | #include "../h/ubavar.h" |
| | 28 | #include "../h/ubareg.h" |
| | 29 | #include "../h/cmap.h" |
| | 30 | |
| | 31 | #include "../h/upreg.h" |
| | 32 | |
| | 33 | struct up_softc { |
| | 34 | int sc_softas; |
| | 35 | int sc_ndrive; |
| | 36 | int sc_wticks; |
| | 37 | int sc_recal; |
| | 38 | } up_softc[NSC]; |
| | 39 | |
| | 40 | /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ |
| | 41 | struct size |
| | 42 | { |
| | 43 | daddr_t nblocks; |
| | 44 | int cyloff; |
| | 45 | } up_sizes[8] = { |
| | 46 | 15884, 0, /* A=cyl 0 thru 26 */ |
| | 47 | 33440, 27, /* B=cyl 27 thru 81 */ |
| | 48 | 495520, 0, /* C=cyl 0 thru 814 */ |
| | 49 | 15884, 562, /* D=cyl 562 thru 588 */ |
| | 50 | 55936, 589, /* E=cyl 589 thru 680 */ |
| | 51 | #ifndef NOBADSECT |
| | 52 | 81376, 681, /* F=cyl 681 thru 814 */ |
| | 53 | 153728, 562, /* G=cyl 562 thru 814 */ |
| | 54 | #else |
| | 55 | 81472, 681, |
| | 56 | 153824, 562, |
| | 57 | #endif |
| | 58 | 291346, 82, /* H=cyl 82 thru 561 */ |
| | 59 | }, fj_sizes[8] = { |
| | 60 | 15884, 0, /* A=cyl 0 thru 49 */ |
| | 61 | 33440, 50, /* B=cyl 50 thru 154 */ |
| | 62 | 263360, 0, /* C=cyl 0 thru 822 */ |
| | 63 | 0, 0, |
| | 64 | 0, 0, |
| | 65 | 0, 0, |
| | 66 | 0, 0, |
| | 67 | #ifndef NOBADSECT |
| | 68 | 213664, 155, /* H=cyl 155 thru 822 */ |
| | 69 | #else |
| | 70 | 213760, 155, |
| | 71 | #endif |
| | 72 | }, am_sizes[8] = { |
| | 73 | 15884, 0, /* A=cyl 0 thru 31 */ |
| | 74 | 33440, 32, /* B=cyl 32 thru 97 */ |
| | 75 | 524288, 0, /* C=cyl 0 thru 1023 */ |
| | 76 | 0, 0, |
| | 77 | 0, 0, |
| | 78 | 0, 0, |
| | 79 | 181760, 668, /* G=cyl 668 thru 1022 */ |
| | 80 | 291346, 98, /* H=cyl 98 thru 667 */ |
| | 81 | }; |
| | 82 | /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ |
| | 83 | |
| | 84 | #define _upSDIST 2 /* 1.0 msec */ |
| | 85 | #define _upRDIST 4 /* 2.0 msec */ |
| | 86 | |
| | 87 | int upSDIST = _upSDIST; |
| | 88 | int upRDIST = _upRDIST; |
| | 89 | |
| | 90 | int upprobe(), upslave(), upattach(), updgo(), upintr(); |
| | 91 | struct uba_ctlr *upminfo[NSC]; |
| | 92 | struct uba_device *updinfo[NUP]; |
| | 93 | struct uba_device *upip[NSC][4]; |
| | 94 | |
| | 95 | u_short upstd[] = { 0776700, 0774400, 0776300, 0 }; |
| | 96 | struct uba_driver scdriver = |
| | 97 | { upprobe, upslave, upattach, updgo, upstd, "up", updinfo, "sc", upminfo }; |
| | 98 | struct buf uputab[NUP]; |
| | 99 | |
| | 100 | struct upst { |
| | 101 | short nsect; |
| | 102 | short ntrak; |
| | 103 | short nspc; |
| | 104 | short ncyl; |
| | 105 | struct size *sizes; |
| | 106 | } upst[] = { |
| | 107 | 32, 19, 32*19, 823, up_sizes, /* 9300/cdc */ |
| | 108 | /* 9300 actually has 815 cylinders... */ |
| | 109 | 32, 10, 32*10, 823, fj_sizes, /* fujitsu 160m */ |
| | 110 | 32, 16, 32*16, 1024, am_sizes, /* fujitsu 160m */ |
| | 111 | }; |
| | 112 | |
| | 113 | u_char up_offset[16] = { |
| | 114 | UPOF_P400, UPOF_M400, UPOF_P400, UPOF_M400, |
| | 115 | UPOF_P800, UPOF_M800, UPOF_P800, UPOF_M800, |
| | 116 | UPOF_P1200, UPOF_M1200, UPOF_P1200, UPOF_M1200, |
| | 117 | 0, 0, 0, 0 |
| | 118 | }; |
| | 119 | |
| | 120 | struct buf rupbuf[NUP]; |
| | 121 | |
| | 122 | #define b_cylin b_resid |
| | 123 | |
| | 124 | #ifdef INTRLVE |
| | 125 | daddr_t dkblock(); |
| | 126 | #endif |
| | 127 | |
| | 128 | int upwstart, upwatch(); /* Have started guardian */ |
| | 129 | int upseek; |
| | 130 | int upwaitdry; |
| | 131 | |
| | 132 | /*ARGSUSED*/ |
| | 133 | upprobe(reg) |
| | 134 | caddr_t reg; |
| | 135 | { |
| | 136 | register int br, cvec; |
| | 137 | |
| | 138 | #ifdef lint |
| | 139 | br = 0; cvec = br; br = cvec; |
| | 140 | #endif |
| | 141 | ((struct updevice *)reg)->upcs1 = UP_IE|UP_RDY; |
| | 142 | DELAY(10); |
| | 143 | ((struct updevice *)reg)->upcs1 = 0; |
| | 144 | return (1); |
| | 145 | } |
| | 146 | |
| | 147 | upslave(ui, reg) |
| | 148 | struct uba_device *ui; |
| | 149 | caddr_t reg; |
| | 150 | { |
| | 151 | register struct updevice *upaddr = (struct updevice *)reg; |
| | 152 | |
| | 153 | upaddr->upcs1 = 0; /* conservative */ |
| | 154 | upaddr->upcs2 = ui->ui_slave; |
| | 155 | if (upaddr->upcs2&UPCS2_NED) { |
| | 156 | upaddr->upcs1 = UP_DCLR|UP_GO; |
| | 157 | return (0); |
| | 158 | } |
| | 159 | return (1); |
| | 160 | } |
| | 161 | |
| | 162 | upattach(ui) |
| | 163 | register struct uba_device *ui; |
| | 164 | { |
| | 165 | register struct updevice *upaddr; |
| | 166 | |
| | 167 | if (upwstart == 0) { |
| | 168 | timeout(upwatch, (caddr_t)0, hz); |
| | 169 | upwstart++; |
| | 170 | } |
| | 171 | if (ui->ui_dk >= 0) |
| | 172 | dk_mspw[ui->ui_dk] = .0000020345; |
| | 173 | upip[ui->ui_ctlr][ui->ui_slave] = ui; |
| | 174 | up_softc[ui->ui_ctlr].sc_ndrive++; |
| | 175 | upaddr = (struct updevice *)ui->ui_addr; |
| | 176 | upaddr->upcs1 = 0; |
| | 177 | upaddr->upcs2 = ui->ui_slave; |
| | 178 | upaddr->uphr = UPHR_MAXTRAK; |
| | 179 | if (upaddr->uphr == 9) |
| | 180 | ui->ui_type = 1; /* fujitsu hack */ |
| | 181 | else if (upaddr->uphr == 15) |
| | 182 | ui->ui_type = 2; /* ampex hack */ |
| | 183 | upaddr->upcs2 = UPCS2_CLR; |
| | 184 | /* |
| | 185 | upaddr->uphr = UPHR_MAXCYL; |
| | 186 | printf("maxcyl %d\n", upaddr->uphr); |
| | 187 | upaddr->uphr = UPHR_MAXTRAK; |
| | 188 | printf("maxtrak %d\n", upaddr->uphr); |
| | 189 | upaddr->uphr = UPHR_MAXSECT; |
| | 190 | printf("maxsect %d\n", upaddr->uphr); |
| | 191 | */ |
| | 192 | } |
| | 193 | |
| | 194 | upstrategy(bp) |
| | 195 | register struct buf *bp; |
| | 196 | { |
| | 197 | register struct uba_device *ui; |
| | 198 | register struct upst *st; |
| | 199 | register int unit; |
| | 200 | register struct buf *dp; |
| | 201 | int xunit = minor(bp->b_dev) & 07; |
| | 202 | long bn, sz; |
| | 203 | |
| | 204 | sz = (bp->b_bcount+511) >> 9; |
| | 205 | unit = dkunit(bp); |
| | 206 | if (unit >= NUP) |
| | 207 | goto bad; |
| | 208 | ui = updinfo[unit]; |
| | 209 | if (ui == 0 || ui->ui_alive == 0) |
| | 210 | goto bad; |
| | 211 | st = &upst[ui->ui_type]; |
| | 212 | if (bp->b_blkno < 0 || |
| | 213 | (bn = dkblock(bp))+sz > st->sizes[xunit].nblocks) |
| | 214 | goto bad; |
| | 215 | bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff; |
| | 216 | (void) spl5(); |
| | 217 | dp = &uputab[ui->ui_unit]; |
| | 218 | disksort(dp, bp); |
| | 219 | if (dp->b_active == 0) { |
| | 220 | (void) upustart(ui); |
| | 221 | bp = &ui->ui_mi->um_tab; |
| | 222 | if (bp->b_actf && bp->b_active == 0) |
| | 223 | (void) upstart(ui->ui_mi); |
| | 224 | } |
| | 225 | (void) spl0(); |
| | 226 | return; |
| | 227 | |
| | 228 | bad: |
| | 229 | bp->b_flags |= B_ERROR; |
| | 230 | iodone(bp); |
| | 231 | return; |
| | 232 | } |
| | 233 | |
| | 234 | /* |
| | 235 | * Unit start routine. |
| | 236 | * Seek the drive to be where the data is |
| | 237 | * and then generate another interrupt |
| | 238 | * to actually start the transfer. |
| | 239 | * If there is only one drive on the controller, |
| | 240 | * or we are very close to the data, don't |
| | 241 | * bother with the search. If called after |
| | 242 | * searching once, don't bother to look where |
| | 243 | * we are, just queue for transfer (to avoid |
| | 244 | * positioning forever without transferrring.) |
| | 245 | */ |
| | 246 | upustart(ui) |
| | 247 | register struct uba_device *ui; |
| | 248 | { |
| | 249 | register struct buf *bp, *dp; |
| | 250 | register struct uba_ctlr *um; |
| | 251 | register struct updevice *upaddr; |
| | 252 | register struct upst *st; |
| | 253 | daddr_t bn; |
| | 254 | int sn, csn; |
| | 255 | /* |
| | 256 | * The SC21 cancels commands if you just say |
| | 257 | * cs1 = UP_IE |
| | 258 | * so we are cautious about handling of cs1. |
| | 259 | * Also don't bother to clear as bits other than in upintr(). |
| | 260 | */ |
| | 261 | int didie = 0; |
| | 262 | |
| | 263 | if (ui == 0) |
| | 264 | return (0); |
| | 265 | um = ui->ui_mi; |
| | 266 | dk_busy &= ~(1<<ui->ui_dk); |
| | 267 | dp = &uputab[ui->ui_unit]; |
| | 268 | if ((bp = dp->b_actf) == NULL) |
| | 269 | goto out; |
| | 270 | /* |
| | 271 | * If the controller is active, just remember |
| | 272 | * that this device would like to be positioned... |
| | 273 | * if we tried to position now we would confuse the SC21. |
| | 274 | */ |
| | 275 | if (um->um_tab.b_active) { |
| | 276 | up_softc[um->um_ctlr].sc_softas |= 1<<ui->ui_slave; |
| | 277 | return (0); |
| | 278 | } |
| | 279 | /* |
| | 280 | * If we have already positioned this drive, |
| | 281 | * then just put it on the ready queue. |
| | 282 | */ |
| | 283 | if (dp->b_active) |
| | 284 | goto done; |
| | 285 | dp->b_active = 1; |
| | 286 | upaddr = (struct updevice *)um->um_addr; |
| | 287 | upaddr->upcs2 = ui->ui_slave; |
| | 288 | /* |
| | 289 | * If drive has just come up, |
| | 290 | * setup the pack. |
| | 291 | */ |
| | 292 | if ((upaddr->upds & UPDS_VV) == 0) { |
| | 293 | /* SHOULD WARN SYSTEM THAT THIS HAPPENED */ |
| | 294 | upaddr->upcs1 = UP_IE|UP_DCLR|UP_GO; |
| | 295 | upaddr->upcs1 = UP_IE|UP_PRESET|UP_GO; |
| | 296 | upaddr->upof = UPOF_FMT22; |
| | 297 | didie = 1; |
| | 298 | } |
| | 299 | /* |
| | 300 | * If drive is offline, forget about positioning. |
| | 301 | */ |
| | 302 | if ((upaddr->upds & (UPDS_DPR|UPDS_MOL)) != (UPDS_DPR|UPDS_MOL)) |
| | 303 | goto done; |
| | 304 | /* |
| | 305 | * If there is only one drive, |
| | 306 | * dont bother searching. |
| | 307 | */ |
| | 308 | if (up_softc[um->um_ctlr].sc_ndrive == 1) |
| | 309 | goto done; |
| | 310 | /* |
| | 311 | * Figure out where this transfer is going to |
| | 312 | * and see if we are close enough to justify not searching. |
| | 313 | */ |
| | 314 | st = &upst[ui->ui_type]; |
| | 315 | bn = dkblock(bp); |
| | 316 | sn = bn%st->nspc; |
| | 317 | sn = (sn + st->nsect - upSDIST) % st->nsect; |
| | 318 | if (bp->b_cylin - upaddr->updc) |
| | 319 | goto search; /* Not on-cylinder */ |
| | 320 | else if (upseek) |
| | 321 | goto done; /* Ok just to be on-cylinder */ |
| | 322 | csn = (upaddr->upla>>6) - sn - 1; |
| | 323 | if (csn < 0) |
| | 324 | csn += st->nsect; |
| | 325 | if (csn > st->nsect - upRDIST) |
| | 326 | goto done; |
| | 327 | search: |
| | 328 | upaddr->updc = bp->b_cylin; |
| | 329 | /* |
| | 330 | * Not on cylinder at correct position, |
| | 331 | * seek/search. |
| | 332 | */ |
| | 333 | if (upseek) |
| | 334 | upaddr->upcs1 = UP_IE|UP_SEEK|UP_GO; |
| | 335 | else { |
| | 336 | upaddr->upda = sn; |
| | 337 | upaddr->upcs1 = UP_IE|UP_SEARCH|UP_GO; |
| | 338 | } |
| | 339 | didie = 1; |
| | 340 | /* |
| | 341 | * Mark unit busy for iostat. |
| | 342 | */ |
| | 343 | if (ui->ui_dk >= 0) { |
| | 344 | dk_busy |= 1<<ui->ui_dk; |
| | 345 | dk_seek[ui->ui_dk]++; |
| | 346 | } |
| | 347 | goto out; |
| | 348 | done: |
| | 349 | /* |
| | 350 | * Device is ready to go. |
| | 351 | * Put it on the ready queue for the controller |
| | 352 | * (unless its already there.) |
| | 353 | */ |
| | 354 | if (dp->b_active != 2) { |
| | 355 | dp->b_forw = NULL; |
| | 356 | if (um->um_tab.b_actf == NULL) |
| | 357 | um->um_tab.b_actf = dp; |
| | 358 | else |
| | 359 | um->um_tab.b_actl->b_forw = dp; |
| | 360 | um->um_tab.b_actl = dp; |
| | 361 | dp->b_active = 2; |
| | 362 | } |
| | 363 | out: |
| | 364 | return (didie); |
| | 365 | } |
| | 366 | |
| | 367 | /* |
| | 368 | * Start up a transfer on a drive. |
| | 369 | */ |
| | 370 | upstart(um) |
| | 371 | register struct uba_ctlr *um; |
| | 372 | { |
| | 373 | register struct buf *bp, *dp; |
| | 374 | register struct uba_device *ui; |
| | 375 | register struct updevice *upaddr; |
| | 376 | struct upst *st; |
| | 377 | daddr_t bn; |
| | 378 | int dn, sn, tn, cmd, waitdry; |
| | 379 | |
| | 380 | loop: |
| | 381 | /* |
| | 382 | * Pull a request off the controller queue |
| | 383 | */ |
| | 384 | if ((dp = um->um_tab.b_actf) == NULL) |
| | 385 | return (0); |
| | 386 | if ((bp = dp->b_actf) == NULL) { |
| | 387 | um->um_tab.b_actf = dp->b_forw; |
| | 388 | goto loop; |
| | 389 | } |
| | 390 | /* |
| | 391 | * Mark controller busy, and |
| | 392 | * determine destination of this request. |
| | 393 | */ |
| | 394 | um->um_tab.b_active++; |
| | 395 | ui = updinfo[dkunit(bp)]; |
| | 396 | bn = dkblock(bp); |
| | 397 | dn = ui->ui_slave; |
| | 398 | st = &upst[ui->ui_type]; |
| | 399 | sn = bn%st->nspc; |
| | 400 | tn = sn/st->nsect; |
| | 401 | sn %= st->nsect; |
| | 402 | upaddr = (struct updevice *)ui->ui_addr; |
| | 403 | /* |
| | 404 | * Select drive if not selected already. |
| | 405 | */ |
| | 406 | if ((upaddr->upcs2&07) != dn) |
| | 407 | upaddr->upcs2 = dn; |
| | 408 | /* |
| | 409 | * Check that it is ready and online |
| | 410 | */ |
| | 411 | waitdry = 0; |
| | 412 | while ((upaddr->upds&UPDS_DRY) == 0) { |
| | 413 | if (++waitdry > 512) |
| | 414 | break; |
| | 415 | upwaitdry++; |
| | 416 | } |
| | 417 | if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { |
| | 418 | printf("up%d: not ready", dkunit(bp)); |
| | 419 | if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { |
| | 420 | printf("\n"); |
| | 421 | um->um_tab.b_active = 0; |
| | 422 | um->um_tab.b_errcnt = 0; |
| | 423 | dp->b_actf = bp->av_forw; |
| | 424 | dp->b_active = 0; |
| | 425 | bp->b_flags |= B_ERROR; |
| | 426 | iodone(bp); |
| | 427 | goto loop; |
| | 428 | } |
| | 429 | /* |
| | 430 | * Oh, well, sometimes this |
| | 431 | * happens, for reasons unknown. |
| | 432 | */ |
| | 433 | printf(" (flakey)\n"); |
| | 434 | } |
| | 435 | /* |
| | 436 | * Setup for the transfer, and get in the |
| | 437 | * UNIBUS adaptor queue. |
| | 438 | */ |
| | 439 | upaddr->updc = bp->b_cylin; |
| | 440 | upaddr->upda = (tn << 8) + sn; |
| | 441 | upaddr->upwc = -bp->b_bcount / sizeof (short); |
| | 442 | if (bp->b_flags & B_READ) |
| | 443 | cmd = UP_IE|UP_RCOM|UP_GO; |
| | 444 | else |
| | 445 | cmd = UP_IE|UP_WCOM|UP_GO; |
| | 446 | um->um_cmd = cmd; |
| | 447 | (void) ubago(ui); |
| | 448 | return (1); |
| | 449 | } |
| | 450 | |
| | 451 | /* |
| | 452 | * Now all ready to go, stuff the registers. |
| | 453 | */ |
| | 454 | updgo(um) |
| | 455 | struct uba_ctlr *um; |
| | 456 | { |
| | 457 | register struct updevice *upaddr = (struct updevice *)um->um_addr; |
| | 458 | |
| | 459 | upaddr->upba = um->um_ubinfo; |
| | 460 | upaddr->upcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x300); |
| | 461 | } |
| | 462 | |
| | 463 | /* |
| | 464 | * Handle a disk interrupt. |
| | 465 | */ |
| | 466 | upintr(sc21) |
| | 467 | register sc21; |
| | 468 | { |
| | 469 | register struct buf *bp, *dp; |
| | 470 | register struct uba_ctlr *um = upminfo[sc21]; |
| | 471 | register struct uba_device *ui; |
| | 472 | register struct updevice *upaddr = (struct updevice *)um->um_addr; |
| | 473 | register unit; |
| | 474 | struct up_softc *sc = &up_softc[um->um_ctlr]; |
| | 475 | int as = (upaddr->upas & 0377) | sc->sc_softas; |
| | 476 | int needie = 1, waitdry; |
| | 477 | |
| | 478 | sc->sc_wticks = 0; |
| | 479 | sc->sc_softas = 0; |
| | 480 | /* |
| | 481 | * If controller wasn't transferring, then this is an |
| | 482 | * interrupt for attention status on seeking drives. |
| | 483 | * Just service them. |
| | 484 | */ |
| | 485 | if (um->um_tab.b_active == 0) { |
| | 486 | if (upaddr->upcs1 & UP_TRE) |
| | 487 | upaddr->upcs1 = UP_TRE; |
| | 488 | goto doattn; |
| | 489 | } |
| | 490 | /* |
| | 491 | * Get device and block structures, and a pointer |
| | 492 | * to the uba_device for the drive. Select the drive. |
| | 493 | */ |
| | 494 | dp = um->um_tab.b_actf; |
| | 495 | bp = dp->b_actf; |
| | 496 | ui = updinfo[dkunit(bp)]; |
| | 497 | dk_busy &= ~(1 << ui->ui_dk); |
| | 498 | if ((upaddr->upcs2&07) != ui->ui_slave) |
| | 499 | upaddr->upcs2 = ui->ui_slave; |
| | 500 | /* |
| | 501 | * Check for and process errors on |
| | 502 | * either the drive or the controller. |
| | 503 | */ |
| | 504 | if ((upaddr->upds&UPDS_ERR) || (upaddr->upcs1&UP_TRE)) { |
| | 505 | waitdry = 0; |
| | 506 | while ((upaddr->upds & UPDS_DRY) == 0) { |
| | 507 | if (++waitdry > 512) |
| | 508 | break; |
| | 509 | upwaitdry++; |
| | 510 | } |
| | 511 | if (upaddr->uper1&UPER1_WLE) { |
| | 512 | /* |
| | 513 | * Give up on write locked devices |
| | 514 | * immediately. |
| | 515 | */ |
| | 516 | printf("up%d: write locked\n", dkunit(bp)); |
| | 517 | bp->b_flags |= B_ERROR; |
| | 518 | } else if (++um->um_tab.b_errcnt > 27) { |
| | 519 | /* |
| | 520 | * After 28 retries (16 without offset, and |
| | 521 | * 12 with offset positioning) give up. |
| | 522 | */ |
| | 523 | harderr(bp, "up"); |
| | 524 | printf("cs2=%b er1=%b er2=%b\n", |
| | 525 | upaddr->upcs2, UPCS2_BITS, |
| | 526 | upaddr->uper1, UPER1_BITS, |
| | 527 | upaddr->uper2, UPER2_BITS); |
| | 528 | bp->b_flags |= B_ERROR; |
| | 529 | } else { |
| | 530 | /* |
| | 531 | * Retriable error. |
| | 532 | * If a soft ecc, correct it (continuing |
| | 533 | * by returning if necessary. |
| | 534 | * Otherwise fall through and retry the transfer |
| | 535 | */ |
| | 536 | um->um_tab.b_active = 0; /* force retry */ |
| | 537 | if ((upaddr->uper1&(UPER1_DCK|UPER1_ECH))==UPER1_DCK) |
| | 538 | if (upecc(ui)) |
| | 539 | return; |
| | 540 | } |
| | 541 | /* |
| | 542 | * Clear drive error and, every eight attempts, |
| | 543 | * (starting with the fourth) |
| | 544 | * recalibrate to clear the slate. |
| | 545 | */ |
| | 546 | upaddr->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; |
| | 547 | needie = 0; |
| | 548 | if ((um->um_tab.b_errcnt&07) == 4 && um->um_tab.b_active == 0) { |
| | 549 | upaddr->upcs1 = UP_RECAL|UP_IE|UP_GO; |
| | 550 | sc->sc_recal = 0; |
| | 551 | goto nextrecal; |
| | 552 | } |
| | 553 | } |
| | 554 | /* |
| | 555 | * Advance recalibration finite state machine |
| | 556 | * if recalibrate in progress, through |
| | 557 | * RECAL |
| | 558 | * SEEK |
| | 559 | * OFFSET (optional) |
| | 560 | * RETRY |
| | 561 | */ |
| | 562 | switch (sc->sc_recal) { |
| | 563 | |
| | 564 | case 1: |
| | 565 | upaddr->updc = bp->b_cylin; |
| | 566 | upaddr->upcs1 = UP_SEEK|UP_IE|UP_GO; |
| | 567 | goto nextrecal; |
| | 568 | case 2: |
| | 569 | if (um->um_tab.b_errcnt < 16 || (bp->b_flags&B_READ) == 0) |
| | 570 | goto donerecal; |
| | 571 | upaddr->upof = up_offset[um->um_tab.b_errcnt & 017] | UPOF_FMT22; |
| | 572 | upaddr->upcs1 = UP_IE|UP_OFFSET|UP_GO; |
| | 573 | goto nextrecal; |
| | 574 | nextrecal: |
| | 575 | sc->sc_recal++; |
| | 576 | um->um_tab.b_active = 1; |
| | 577 | return; |
| | 578 | donerecal: |
| | 579 | case 3: |
| | 580 | sc->sc_recal = 0; |
| | 581 | um->um_tab.b_active = 0; |
| | 582 | break; |
| | 583 | } |
| | 584 | /* |
| | 585 | * If still ``active'', then don't need any more retries. |
| | 586 | */ |
| | 587 | if (um->um_tab.b_active) { |
| | 588 | /* |
| | 589 | * If we were offset positioning, |
| | 590 | * return to centerline. |
| | 591 | */ |
| | 592 | if (um->um_tab.b_errcnt >= 16) { |
| | 593 | upaddr->upof = UPOF_FMT22; |
| | 594 | upaddr->upcs1 = UP_RTC|UP_GO|UP_IE; |
| | 595 | while (upaddr->upds & UPDS_PIP) |
| | 596 | DELAY(25); |
| | 597 | needie = 0; |
| | 598 | } |
| | 599 | um->um_tab.b_active = 0; |
| | 600 | um->um_tab.b_errcnt = 0; |
| | 601 | um->um_tab.b_actf = dp->b_forw; |
| | 602 | dp->b_active = 0; |
| | 603 | dp->b_errcnt = 0; |
| | 604 | dp->b_actf = bp->av_forw; |
| | 605 | bp->b_resid = (-upaddr->upwc * sizeof(short)); |
| | 606 | iodone(bp); |
| | 607 | /* |
| | 608 | * If this unit has more work to do, |
| | 609 | * then start it up right away. |
| | 610 | */ |
| | 611 | if (dp->b_actf) |
| | 612 | if (upustart(ui)) |
| | 613 | needie = 0; |
| | 614 | } |
| | 615 | as &= ~(1<<ui->ui_slave); |
| | 616 | /* |
| | 617 | * Release unibus resources and flush data paths. |
| | 618 | */ |
| | 619 | ubadone(um); |
| | 620 | doattn: |
| | 621 | /* |
| | 622 | * Process other units which need attention. |
| | 623 | * For each unit which needs attention, call |
| | 624 | * the unit start routine to place the slave |
| | 625 | * on the controller device queue. |
| | 626 | */ |
| | 627 | while (unit = ffs(as)) { |
| | 628 | unit--; /* was 1 origin */ |
| | 629 | as &= ~(1<<unit); |
| | 630 | upaddr->upas = 1<<unit; |
| | 631 | if (upustart(upip[sc21][unit])) |
| | 632 | needie = 0; |
| | 633 | } |
| | 634 | /* |
| | 635 | * If the controller is not transferring, but |
| | 636 | * there are devices ready to transfer, start |
| | 637 | * the controller. |
| | 638 | */ |
| | 639 | if (um->um_tab.b_actf && um->um_tab.b_active == 0) |
| | 640 | if (upstart(um)) |
| | 641 | needie = 0; |
| | 642 | if (needie) |
| | 643 | upaddr->upcs1 = UP_IE; |
| | 644 | } |
| | 645 | |
| | 646 | upread(dev) |
| | 647 | dev_t dev; |
| | 648 | { |
| | 649 | register int unit = minor(dev) >> 3; |
| | 650 | |
| | 651 | if (unit >= NUP) |
| | 652 | u.u_error = ENXIO; |
| | 653 | else |
| | 654 | physio(upstrategy, &rupbuf[unit], dev, B_READ, minphys); |
| | 655 | } |
| | 656 | |
| | 657 | upwrite(dev) |
| | 658 | dev_t dev; |
| | 659 | { |
| | 660 | register int unit = minor(dev) >> 3; |
| | 661 | |
| | 662 | if (unit >= NUP) |
| | 663 | u.u_error = ENXIO; |
| | 664 | else |
| | 665 | physio(upstrategy, &rupbuf[unit], dev, B_WRITE, minphys); |
| | 666 | } |
| | 667 | |
| | 668 | /* |
| | 669 | * Correct an ECC error, and restart the i/o to complete |
| | 670 | * the transfer if necessary. This is quite complicated because |
| | 671 | * the transfer may be going to an odd memory address base and/or |
| | 672 | * across a page boundary. |
| | 673 | */ |
| | 674 | upecc(ui) |
| | 675 | register struct uba_device *ui; |
| | 676 | { |
| | 677 | register struct updevice *up = (struct updevice *)ui->ui_addr; |
| | 678 | register struct buf *bp = uputab[ui->ui_unit].b_actf; |
| | 679 | register struct uba_ctlr *um = ui->ui_mi; |
| | 680 | register struct upst *st; |
| | 681 | struct uba_regs *ubp = ui->ui_hd->uh_uba; |
| | 682 | register int i; |
| | 683 | caddr_t addr; |
| | 684 | int reg, bit, byte, npf, mask, o, cmd, ubaddr; |
| | 685 | int bn, cn, tn, sn; |
| | 686 | |
| | 687 | /* |
| | 688 | * Npf is the number of sectors transferred before the sector |
| | 689 | * containing the ECC error, and reg is the UBA register |
| | 690 | * mapping (the first part of) the transfer. |
| | 691 | * O is offset within a memory page of the first byte transferred. |
| | 692 | */ |
| | 693 | npf = btop((up->upwc * sizeof(short)) + bp->b_bcount) - 1; |
| | 694 | reg = btop(um->um_ubinfo&0x3ffff) + npf; |
| | 695 | o = (int)bp->b_un.b_addr & PGOFSET; |
| | 696 | printf("up%d%c: soft ecc sn%d\n", dkunit(bp), |
| | 697 | 'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf); |
| | 698 | mask = up->upec2; |
| | 699 | #ifdef UPECCDEBUG |
| | 700 | printf("npf %d reg %x o %d mask %o pos %d\n", npf, reg, o, mask, |
| | 701 | up->upec1); |
| | 702 | #endif |
| | 703 | /* |
| | 704 | * Flush the buffered data path, and compute the |
| | 705 | * byte and bit position of the error. The variable i |
| | 706 | * is the byte offset in the transfer, the variable byte |
| | 707 | * is the offset from a page boundary in main memory. |
| | 708 | */ |
| | 709 | ubapurge(um); |
| | 710 | i = up->upec1 - 1; /* -1 makes 0 origin */ |
| | 711 | bit = i&07; |
| | 712 | i = (i&~07)>>3; |
| | 713 | byte = i + o; |
| | 714 | /* |
| | 715 | * Correct while possible bits remain of mask. Since mask |
| | 716 | * contains 11 bits, we continue while the bit offset is > -11. |
| | 717 | * Also watch out for end of this block and the end of the whole |
| | 718 | * transfer. |
| | 719 | */ |
| | 720 | while (i < 512 && (int)ptob(npf)+i < bp->b_bcount && bit > -11) { |
| | 721 | addr = ptob(ubp->uba_map[reg+btop(byte)].pg_pfnum)+ |
| | 722 | (byte & PGOFSET); |
| | 723 | #ifdef UPECCDEBUG |
| | 724 | printf("addr %x map reg %x\n", |
| | 725 | addr, *(int *)(&ubp->uba_map[reg+btop(byte)])); |
| | 726 | printf("old: %x, ", getmemc(addr)); |
| | 727 | #endif |
| | 728 | putmemc(addr, getmemc(addr)^(mask<<bit)); |
| | 729 | #ifdef UPECCDEBUG |
| | 730 | printf("new: %x\n", getmemc(addr)); |
| | 731 | #endif |
| | 732 | byte++; |
| | 733 | i++; |
| | 734 | bit -= 8; |
| | 735 | } |
| | 736 | um->um_tab.b_active++; /* Either complete or continuing... */ |
| | 737 | if (up->upwc == 0) |
| | 738 | return (0); |
| | 739 | /* |
| | 740 | * Have to continue the transfer... clear the drive, |
| | 741 | * and compute the position where the transfer is to continue. |
| | 742 | * We have completed npf+1 sectors of the transfer already; |
| | 743 | * restart at offset o of next sector (i.e. in UBA register reg+1). |
| | 744 | */ |
| | 745 | #ifdef notdef |
| | 746 | up->uper1 = 0; |
| | 747 | up->upcs1 |= UP_GO; |
| | 748 | #else |
| | 749 | up->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; |
| | 750 | bn = dkblock(bp); |
| | 751 | st = &upst[ui->ui_type]; |
| | 752 | cn = bp->b_cylin; |
| | 753 | sn = bn%st->nspc + npf + 1; |
| | 754 | tn = sn/st->nsect; |
| | 755 | sn %= st->nsect; |
| | 756 | cn += tn/st->ntrak; |
| | 757 | tn %= st->ntrak; |
| | 758 | up->updc = cn; |
| | 759 | up->upda = (tn << 8) | sn; |
| | 760 | ubaddr = (int)ptob(reg+1) + o; |
| | 761 | up->upba = ubaddr; |
| | 762 | cmd = (ubaddr >> 8) & 0x300; |
| | 763 | cmd |= UP_IE|UP_GO|UP_RCOM; |
| | 764 | up->upcs1 = cmd; |
| | 765 | #endif |
| | 766 | return (1); |
| | 767 | } |
| | 768 | |
| | 769 | /* |
| | 770 | * Reset driver after UBA init. |
| | 771 | * Cancel software state of all pending transfers |
| | 772 | * and restart all units and the controller. |
| | 773 | */ |
| | 774 | upreset(uban) |
| | 775 | int uban; |
| | 776 | { |
| | 777 | register struct uba_ctlr *um; |
| | 778 | register struct uba_device *ui; |
| | 779 | register sc21, unit; |
| | 780 | |
| | 781 | for (sc21 = 0; sc21 < NSC; sc21++) { |
| | 782 | if ((um = upminfo[sc21]) == 0 || um->um_ubanum != uban || |
| | 783 | um->um_alive == 0) |
| | 784 | continue; |
| | 785 | printf(" sc%d", sc21); |
| | 786 | um->um_tab.b_active = 0; |
| | 787 | um->um_tab.b_actf = um->um_tab.b_actl = 0; |
| | 788 | up_softc[sc21].sc_recal = 0; |
| | 789 | if (um->um_ubinfo) { |
| | 790 | printf("<%d>", (um->um_ubinfo>>28)&0xf); |
| | 791 | ubadone(um); |
| | 792 | } |
| | 793 | ((struct updevice *)(um->um_addr))->upcs2 = UPCS2_CLR; |
| | 794 | for (unit = 0; unit < NUP; unit++) { |
| | 795 | if ((ui = updinfo[unit]) == 0) |
| | 796 | continue; |
| | 797 | if (ui->ui_alive == 0 || ui->ui_mi != um) |
| | 798 | continue; |
| | 799 | uputab[unit].b_active = 0; |
| | 800 | (void) upustart(ui); |
| | 801 | } |
| | 802 | (void) upstart(um); |
| | 803 | } |
| | 804 | } |
| | 805 | |
| | 806 | /* |
| | 807 | * Wake up every second and if an interrupt is pending |
| | 808 | * but nothing has happened increment a counter. |
| | 809 | * If nothing happens for 20 seconds, reset the UNIBUS |
| | 810 | * and begin anew. |
| | 811 | */ |
| | 812 | upwatch() |
| | 813 | { |
| | 814 | register struct uba_ctlr *um; |
| | 815 | register sc21, unit; |
| | 816 | register struct up_softc *sc; |
| | 817 | |
| | 818 | timeout(upwatch, (caddr_t)0, hz); |
| | 819 | for (sc21 = 0; sc21 < NSC; sc21++) { |
| | 820 | um = upminfo[sc21]; |
| | 821 | if (um == 0 || um->um_alive == 0) |
| | 822 | continue; |
| | 823 | sc = &up_softc[sc21]; |
| | 824 | if (um->um_tab.b_active == 0) { |
| | 825 | for (unit = 0; unit < NUP; unit++) |
| | 826 | if (uputab[unit].b_active && |
| | 827 | updinfo[unit]->ui_mi == um) |
| | 828 | goto active; |
| | 829 | sc->sc_wticks = 0; |
| | 830 | continue; |
| | 831 | } |
| | 832 | active: |
| | 833 | sc->sc_wticks++; |
| | 834 | if (sc->sc_wticks >= 20) { |
| | 835 | sc->sc_wticks = 0; |
| | 836 | printf("sc%d: lost interrupt\n", sc21); |
| | 837 | ubareset(um->um_ubanum); |
| | 838 | } |
| | 839 | } |
| | 840 | } |
| | 841 | |
| | 842 | #define DBSIZE 20 |
| | 843 | |
| | 844 | updump(dev) |
| | 845 | dev_t dev; |
| | 846 | { |
| | 847 | struct updevice *upaddr; |
| | 848 | char *start; |
| | 849 | int num, blk, unit; |
| | 850 | struct size *sizes; |
| | 851 | register struct uba_regs *uba; |
| | 852 | register struct uba_device *ui; |
| | 853 | register short *rp; |
| | 854 | struct upst *st; |
| | 855 | |
| | 856 | unit = minor(dev) >> 3; |
| | 857 | if (unit >= NUP) |
| | 858 | return (ENXIO); |
| | 859 | #define phys(cast, addr) ((cast)((int)addr & 0x7fffffff)) |
| | 860 | ui = phys(struct uba_device *, updinfo[unit]); |
| | 861 | if (ui->ui_alive == 0) |
| | 862 | return (ENXIO); |
| | 863 | uba = phys(struct uba_hd *, ui->ui_hd)->uh_physuba; |
| | 864 | ubainit(uba); |
| | 865 | upaddr = (struct updevice *)ui->ui_physaddr; |
| | 866 | DELAY(2000000); |
| | 867 | num = maxfree; |
| | 868 | start = 0; |
| | 869 | upaddr->upcs2 = unit; |
| | 870 | DELAY(100); |
| | 871 | if ((upaddr->upcs1&UP_DVA) == 0) |
| | 872 | return (EFAULT); |
| | 873 | if ((upaddr->upds & UPDS_VV) == 0) { |
| | 874 | upaddr->upcs1 = UP_DCLR|UP_GO; |
| | 875 | upaddr->upcs1 = UP_PRESET|UP_GO; |
| | 876 | upaddr->upof = UPOF_FMT22; |
| | 877 | } |
| | 878 | if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) |
| | 879 | return (EFAULT); |
| | 880 | st = &upst[ui->ui_type]; |
| | 881 | sizes = phys(struct size *, st->sizes); |
| | 882 | if (dumplo < 0 || dumplo + num >= sizes[minor(dev)&07].nblocks) |
| | 883 | return (EINVAL); |
| | 884 | while (num > 0) { |
| | 885 | register struct pte *io; |
| | 886 | register int i; |
| | 887 | int cn, sn, tn; |
| | 888 | daddr_t bn; |
| | 889 | |
| | 890 | blk = num > DBSIZE ? DBSIZE : num; |
| | 891 | io = uba->uba_map; |
| | 892 | for (i = 0; i < blk; i++) |
| | 893 | *(int *)io++ = (btop(start)+i) | (1<<21) | UBAMR_MRV; |
| | 894 | *(int *)io = 0; |
| | 895 | bn = dumplo + btop(start); |
| | 896 | cn = bn/st->nspc + sizes[minor(dev)&07].cyloff; |
| | 897 | sn = bn%st->nspc; |
| | 898 | tn = sn/st->nsect; |
| | 899 | sn = sn%st->nsect; |
| | 900 | upaddr->updc = cn; |
| | 901 | rp = (short *) &upaddr->upda; |
| | 902 | *rp = (tn << 8) + sn; |
| | 903 | *--rp = 0; |
| | 904 | *--rp = -blk*NBPG / sizeof (short); |
| | 905 | *--rp = UP_GO|UP_WCOM; |
| | 906 | do { |
| | 907 | DELAY(25); |
| | 908 | } while ((upaddr->upcs1 & UP_RDY) == 0); |
| | 909 | if (upaddr->upds&UPDS_ERR) |
| | 910 | return (EIO); |
| | 911 | start += blk*NBPG; |
| | 912 | num -= blk; |
| | 913 | } |
| | 914 | return (0); |
| | 915 | } |
| | 916 | #endif |
projects / unix-history / blame_incremental