| 1 | /* ts.c 4.23 82/02/03 */ |
| 2 | |
| 3 | #include "ts.h" |
| 4 | #if NTS > 0 |
| 5 | /* |
| 6 | * TS11 tape driver |
| 7 | * |
| 8 | * TODO: |
| 9 | * write dump code |
| 10 | */ |
| 11 | #include "../h/param.h" |
| 12 | #include "../h/systm.h" |
| 13 | #include "../h/buf.h" |
| 14 | #include "../h/dir.h" |
| 15 | #include "../h/conf.h" |
| 16 | #include "../h/user.h" |
| 17 | #include "../h/file.h" |
| 18 | #include "../h/map.h" |
| 19 | #include "../h/pte.h" |
| 20 | #include "../h/vm.h" |
| 21 | #include "../h/ubareg.h" |
| 22 | #include "../h/ubavar.h" |
| 23 | #include "../h/mtio.h" |
| 24 | #include "../h/ioctl.h" |
| 25 | #include "../h/cmap.h" |
| 26 | #include "../h/cpu.h" |
| 27 | |
| 28 | #include "../h/tsreg.h" |
| 29 | |
| 30 | /* |
| 31 | * There is a ctsbuf per tape controller. |
| 32 | * It is used as the token to pass to the internal routines |
| 33 | * to execute tape ioctls. |
| 34 | * In particular, when the tape is rewinding on close we release |
| 35 | * the user process but any further attempts to use the tape drive |
| 36 | * before the rewind completes will hang waiting for ctsbuf. |
| 37 | */ |
| 38 | struct buf ctsbuf[NTS]; |
| 39 | |
| 40 | /* |
| 41 | * Raw tape operations use rtsbuf. The driver |
| 42 | * notices when rtsbuf is being used and allows the user |
| 43 | * program to continue after errors and read records |
| 44 | * not of the standard length (BSIZE). |
| 45 | */ |
| 46 | struct buf rtsbuf[NTS]; |
| 47 | |
| 48 | /* |
| 49 | * Driver unibus interface routines and variables. |
| 50 | */ |
| 51 | int tsprobe(), tsslave(), tsattach(), tsdgo(), tsintr(); |
| 52 | struct uba_ctlr *tsminfo[NTS]; |
| 53 | struct uba_device *tsdinfo[NTS]; |
| 54 | struct buf tsutab[NTS]; |
| 55 | u_short tsstd[] = { 0772520, 0 }; |
| 56 | /*** PROBABLY DON'T NEED ALL THESE SINCE CONTROLLER == DRIVE ***/ |
| 57 | struct uba_driver zsdriver = |
| 58 | { tsprobe, tsslave, tsattach, tsdgo, tsstd, "ts", tsdinfo, "zs", tsminfo, 0 }; |
| 59 | |
| 60 | /* bits in minor device */ |
| 61 | #define TSUNIT(dev) (minor(dev)&03) |
| 62 | #define T_NOREWIND 04 |
| 63 | |
| 64 | #define INF (daddr_t)1000000L |
| 65 | |
| 66 | /* |
| 67 | * Software state per tape transport. |
| 68 | * Also contains hardware state in message packets. |
| 69 | * |
| 70 | * 1. A tape drive is a unique-open device; we refuse opens when it is already. |
| 71 | * 2. We keep track of the current position on a block tape and seek |
| 72 | * before operations by forward/back spacing if necessary. |
| 73 | * 3. We remember if the last operation was a write on a tape, so if a tape |
| 74 | * is open read write and the last thing done is a write we can |
| 75 | * write a standard end of tape mark (two eofs). |
| 76 | * 4. We remember the status registers after the last command, using |
| 77 | * then internally and returning them to the SENSE ioctl. |
| 78 | */ |
| 79 | struct ts_softc { |
| 80 | char sc_openf; /* lock against multiple opens */ |
| 81 | char sc_lastiow; /* last op was a write */ |
| 82 | short sc_resid; /* copy of last bc */ |
| 83 | daddr_t sc_blkno; /* block number, for block device tape */ |
| 84 | daddr_t sc_nxrec; /* position of end of tape, if known */ |
| 85 | struct ts_cmd sc_cmd; /* the command packet */ |
| 86 | struct ts_sts sc_sts; /* status packet, for returned status */ |
| 87 | struct ts_char sc_char; /* characteristics packet */ |
| 88 | struct ts_softc *sc_ubaddr; /* Unibus address of ts_softc structure */ |
| 89 | u_short sc_uba; /* Unibus addr of cmd pkt for tsdb */ |
| 90 | short sc_mapped; /* is ts_sfotc mapped in Unibus space? */ |
| 91 | } ts_softc[NTS]; |
| 92 | |
| 93 | /* |
| 94 | * States for um->um_tab.b_active, the per controller state flag. |
| 95 | * This is used to sequence control in the driver. |
| 96 | */ |
| 97 | #define SSEEK 1 /* seeking */ |
| 98 | #define SIO 2 /* doing seq i/o */ |
| 99 | #define SCOM 3 /* sending control command */ |
| 100 | #define SREW 4 /* sending a drive rewind */ |
| 101 | |
| 102 | /* |
| 103 | * Determine if there is a controller for |
| 104 | * a ts at address reg. Our goal is to make the |
| 105 | * device interrupt. |
| 106 | */ |
| 107 | /*ARGSUSED*/ |
| 108 | tsprobe(reg) |
| 109 | caddr_t reg; |
| 110 | { |
| 111 | register int br, cvec; /* must be r11,r10; value-result */ |
| 112 | |
| 113 | #ifdef lint |
| 114 | br = 0; cvec = br; br = cvec; |
| 115 | tsintr(0); |
| 116 | #endif |
| 117 | ((struct tsdevice *)reg)->tssr = 0; |
| 118 | DELAY(100); |
| 119 | if ((((struct tsdevice *)reg)->tssr & TS_NBA) == 0) |
| 120 | return(0); |
| 121 | /* IT'S TOO HARD TO MAKE THIS THING INTERRUPT JUST TO FIND ITS VECTOR */ |
| 122 | cvec = ((unsigned)reg) & 07 ? 0260 : 0224; |
| 123 | br = 0x15; |
| 124 | return (1); |
| 125 | } |
| 126 | |
| 127 | /* |
| 128 | * TS11 only supports one drive per controller; |
| 129 | * check for ui_slave == 0. |
| 130 | * |
| 131 | * DO WE REALLY NEED THIS ROUTINE??? |
| 132 | */ |
| 133 | /*ARGSUSED*/ |
| 134 | tsslave(ui, reg) |
| 135 | struct uba_device *ui; |
| 136 | caddr_t reg; |
| 137 | { |
| 138 | |
| 139 | if (ui->ui_slave) /* non-zero slave not allowed */ |
| 140 | return(0); |
| 141 | return (1); |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * Record attachment of the unit to the controller. |
| 146 | * |
| 147 | * SHOULD THIS ROUTINE DO ANYTHING??? |
| 148 | */ |
| 149 | /*ARGSUSED*/ |
| 150 | tsattach(ui) |
| 151 | struct uba_device *ui; |
| 152 | { |
| 153 | |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * Open the device. Tapes are unique open |
| 158 | * devices, so we refuse if it is already open. |
| 159 | * We also check that a tape is available, and |
| 160 | * don't block waiting here; if you want to wait |
| 161 | * for a tape you should timeout in user code. |
| 162 | */ |
| 163 | tsopen(dev, flag) |
| 164 | dev_t dev; |
| 165 | int flag; |
| 166 | { |
| 167 | register int tsunit; |
| 168 | register struct uba_device *ui; |
| 169 | register struct ts_softc *sc; |
| 170 | |
| 171 | tsunit = TSUNIT(dev); |
| 172 | if (tsunit>=NTS || (sc = &ts_softc[tsunit])->sc_openf || |
| 173 | (ui = tsdinfo[tsunit]) == 0 || ui->ui_alive == 0) { |
| 174 | u.u_error = ENXIO; |
| 175 | return; |
| 176 | } |
| 177 | if (tsinit(tsunit)) { |
| 178 | u.u_error = ENXIO; |
| 179 | return; |
| 180 | } |
| 181 | tscommand(dev, TS_SENSE, 1); |
| 182 | if ((sc->sc_sts.s_xs0&TS_ONL) == 0) { |
| 183 | uprintf("ts%d: not online\n", tsunit); |
| 184 | u.u_error = EIO; |
| 185 | return; |
| 186 | } |
| 187 | if ((flag&(FREAD|FWRITE)) == FWRITE && (sc->sc_sts.s_xs0&TS_WLK)) { |
| 188 | uprintf("ts%d: no write ring\n", tsunit); |
| 189 | u.u_error = EIO; |
| 190 | return; |
| 191 | } |
| 192 | sc->sc_openf = 1; |
| 193 | sc->sc_blkno = (daddr_t)0; |
| 194 | sc->sc_nxrec = INF; |
| 195 | sc->sc_lastiow = 0; |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * Close tape device. |
| 200 | * |
| 201 | * If tape was open for writing or last operation was |
| 202 | * a write, then write two EOF's and backspace over the last one. |
| 203 | * Unless this is a non-rewinding special file, rewind the tape. |
| 204 | * Make the tape available to others. |
| 205 | */ |
| 206 | tsclose(dev, flag) |
| 207 | register dev_t dev; |
| 208 | register flag; |
| 209 | { |
| 210 | register struct ts_softc *sc = &ts_softc[TSUNIT(dev)]; |
| 211 | |
| 212 | if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { |
| 213 | tscommand(dev, TS_WEOF, 1); |
| 214 | tscommand(dev, TS_WEOF, 1); |
| 215 | tscommand(dev, TS_SREV, 1); |
| 216 | } |
| 217 | if ((minor(dev)&T_NOREWIND) == 0) |
| 218 | /* |
| 219 | * 0 count means don't hang waiting for rewind complete |
| 220 | * rather ctsbuf stays busy until the operation completes |
| 221 | * preventing further opens from completing by |
| 222 | * preventing a TS_SENSE from completing. |
| 223 | */ |
| 224 | tscommand(dev, TS_REW, 0); |
| 225 | sc->sc_openf = 0; |
| 226 | } |
| 227 | |
| 228 | /* |
| 229 | * Initialize the TS11. Set up Unibus mapping for command |
| 230 | * packets and set device characteristics. |
| 231 | */ |
| 232 | tsinit(unit) |
| 233 | register int unit; |
| 234 | { |
| 235 | register struct ts_softc *sc = &ts_softc[unit]; |
| 236 | register struct uba_ctlr *um = tsminfo[unit]; |
| 237 | register struct tsdevice *addr = (struct tsdevice *)um->um_addr; |
| 238 | register int i; |
| 239 | |
| 240 | /* |
| 241 | * Map the command and message packets into Unibus |
| 242 | * address space. We do all the command and message |
| 243 | * packets at once to minimize the amount of Unibus |
| 244 | * mapping necessary. |
| 245 | */ |
| 246 | if (sc->sc_mapped == 0) { |
| 247 | ctsbuf[unit].b_un.b_addr = (caddr_t)sc; |
| 248 | ctsbuf[unit].b_bcount = sizeof(*sc); |
| 249 | i = ubasetup(um->um_ubanum, &ctsbuf[unit], 0); |
| 250 | i &= 0777777; |
| 251 | sc->sc_ubaddr = (struct ts_softc *)i; |
| 252 | sc->sc_mapped++; |
| 253 | } |
| 254 | /* |
| 255 | * Now initialize the TS11 controller. |
| 256 | * Set the characteristics. |
| 257 | */ |
| 258 | if (addr->tssr & (TS_NBA|TS_OFL)) { |
| 259 | addr->tssr = 0; /* subsystem initialize */ |
| 260 | tswait(addr); |
| 261 | i = (int)&sc->sc_ubaddr->sc_cmd; /* Unibus addr of cmd */ |
| 262 | sc->sc_uba = (u_short)(i + ((i>>16)&3)); |
| 263 | sc->sc_char.char_addr = (int)&sc->sc_ubaddr->sc_sts; |
| 264 | sc->sc_char.char_size = sizeof(struct ts_sts); |
| 265 | sc->sc_char.char_mode = TS_ESS; |
| 266 | sc->sc_cmd.c_cmd = TS_ACK | TS_SETCHR; |
| 267 | i = (int)&sc->sc_ubaddr->sc_char; |
| 268 | sc->sc_cmd.c_loba = i; |
| 269 | sc->sc_cmd.c_hiba = (i>>16)&3; |
| 270 | sc->sc_cmd.c_size = sizeof(struct ts_char); |
| 271 | addr->tsdb = sc->sc_uba; |
| 272 | tswait(addr); |
| 273 | if (addr->tssr & TS_NBA) |
| 274 | return(1); |
| 275 | } |
| 276 | return(0); |
| 277 | } |
| 278 | |
| 279 | /* |
| 280 | * Execute a command on the tape drive |
| 281 | * a specified number of times. |
| 282 | */ |
| 283 | tscommand(dev, com, count) |
| 284 | dev_t dev; |
| 285 | int com, count; |
| 286 | { |
| 287 | register struct buf *bp; |
| 288 | register int s; |
| 289 | |
| 290 | bp = &ctsbuf[TSUNIT(dev)]; |
| 291 | s = spl5(); |
| 292 | while (bp->b_flags&B_BUSY) { |
| 293 | /* |
| 294 | * This special check is because B_BUSY never |
| 295 | * gets cleared in the non-waiting rewind case. |
| 296 | */ |
| 297 | if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) |
| 298 | break; |
| 299 | bp->b_flags |= B_WANTED; |
| 300 | sleep((caddr_t)bp, PRIBIO); |
| 301 | } |
| 302 | bp->b_flags = B_BUSY|B_READ; |
| 303 | splx(s); |
| 304 | bp->b_dev = dev; |
| 305 | bp->b_repcnt = count; |
| 306 | bp->b_command = com; |
| 307 | bp->b_blkno = 0; |
| 308 | tsstrategy(bp); |
| 309 | /* |
| 310 | * In case of rewind from close, don't wait. |
| 311 | * This is the only case where count can be 0. |
| 312 | */ |
| 313 | if (count == 0) |
| 314 | return; |
| 315 | iowait(bp); |
| 316 | if (bp->b_flags&B_WANTED) |
| 317 | wakeup((caddr_t)bp); |
| 318 | bp->b_flags &= B_ERROR; |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * Queue a tape operation. |
| 323 | */ |
| 324 | tsstrategy(bp) |
| 325 | register struct buf *bp; |
| 326 | { |
| 327 | int tsunit = TSUNIT(bp->b_dev); |
| 328 | register struct uba_ctlr *um; |
| 329 | register struct buf *dp; |
| 330 | register int s; |
| 331 | |
| 332 | /* |
| 333 | * Put transfer at end of controller queue |
| 334 | */ |
| 335 | bp->av_forw = NULL; |
| 336 | um = tsdinfo[tsunit]->ui_mi; |
| 337 | s = spl5(); |
| 338 | dp = &tsutab[tsunit]; |
| 339 | if (dp->b_actf == NULL) |
| 340 | dp->b_actf = bp; |
| 341 | else |
| 342 | dp->b_actl->av_forw = bp; |
| 343 | dp->b_actl = bp; |
| 344 | um->um_tab.b_actf = um->um_tab.b_actl = dp; |
| 345 | /* |
| 346 | * If the controller is not busy, get |
| 347 | * it going. |
| 348 | */ |
| 349 | if (um->um_tab.b_active == 0) |
| 350 | tsstart(um); |
| 351 | splx(s); |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * Start activity on a ts controller. |
| 356 | */ |
| 357 | tsstart(um) |
| 358 | register struct uba_ctlr *um; |
| 359 | { |
| 360 | register struct buf *bp; |
| 361 | register struct tsdevice *addr = (struct tsdevice *)um->um_addr; |
| 362 | register struct ts_softc *sc; |
| 363 | register struct ts_cmd *tc; |
| 364 | register struct uba_device *ui; |
| 365 | int tsunit, cmd; |
| 366 | daddr_t blkno; |
| 367 | |
| 368 | /* |
| 369 | * Start the controller if there is something for it to do. |
| 370 | */ |
| 371 | loop: |
| 372 | if ((bp = um->um_tab.b_actf->b_actf) == NULL) |
| 373 | return; |
| 374 | tsunit = TSUNIT(bp->b_dev); |
| 375 | ui = tsdinfo[tsunit]; |
| 376 | sc = &ts_softc[tsunit]; |
| 377 | tc = &sc->sc_cmd; |
| 378 | /* |
| 379 | * Default is that last command was NOT a write command; |
| 380 | * if we do a write command we will notice this in tsintr(). |
| 381 | */ |
| 382 | sc->sc_lastiow = 0; |
| 383 | if (sc->sc_openf < 0 || (addr->tssr&TS_OFL)) { |
| 384 | /* |
| 385 | * Have had a hard error on a non-raw tape |
| 386 | * or the tape unit is now unavailable |
| 387 | * (e.g. taken off line). |
| 388 | */ |
| 389 | bp->b_flags |= B_ERROR; |
| 390 | goto next; |
| 391 | } |
| 392 | if (bp == &ctsbuf[TSUNIT(bp->b_dev)]) { |
| 393 | /* |
| 394 | * Execute control operation with the specified count. |
| 395 | */ |
| 396 | um->um_tab.b_active = |
| 397 | bp->b_command == TS_REW ? SREW : SCOM; |
| 398 | tc->c_repcnt = bp->b_repcnt; |
| 399 | goto dobpcmd; |
| 400 | } |
| 401 | /* |
| 402 | * The following checks handle boundary cases for operation |
| 403 | * on non-raw tapes. On raw tapes the initialization of |
| 404 | * sc->sc_nxrec by tsphys causes them to be skipped normally |
| 405 | * (except in the case of retries). |
| 406 | */ |
| 407 | if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { |
| 408 | /* |
| 409 | * Can't read past known end-of-file. |
| 410 | */ |
| 411 | bp->b_flags |= B_ERROR; |
| 412 | bp->b_error = ENXIO; |
| 413 | goto next; |
| 414 | } |
| 415 | if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && |
| 416 | bp->b_flags&B_READ) { |
| 417 | /* |
| 418 | * Reading at end of file returns 0 bytes. |
| 419 | */ |
| 420 | bp->b_resid = bp->b_bcount; |
| 421 | clrbuf(bp); |
| 422 | goto next; |
| 423 | } |
| 424 | if ((bp->b_flags&B_READ) == 0) |
| 425 | /* |
| 426 | * Writing sets EOF |
| 427 | */ |
| 428 | sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; |
| 429 | /* |
| 430 | * If the data transfer command is in the correct place, |
| 431 | * set up all the registers except the csr, and give |
| 432 | * control over to the UNIBUS adapter routines, to |
| 433 | * wait for resources to start the i/o. |
| 434 | */ |
| 435 | if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { |
| 436 | tc->c_size = bp->b_bcount; |
| 437 | if ((bp->b_flags&B_READ) == 0) |
| 438 | cmd = TS_WCOM; |
| 439 | else |
| 440 | cmd = TS_RCOM; |
| 441 | if (um->um_tab.b_errcnt) |
| 442 | cmd |= TS_RETRY; |
| 443 | um->um_tab.b_active = SIO; |
| 444 | tc->c_cmd = TS_ACK | TS_CVC | TS_IE | cmd; |
| 445 | (void) ubago(ui); |
| 446 | return; |
| 447 | } |
| 448 | /* |
| 449 | * Tape positioned incorrectly; |
| 450 | * set to seek forwards or backwards to the correct spot. |
| 451 | * This happens for raw tapes only on error retries. |
| 452 | */ |
| 453 | um->um_tab.b_active = SSEEK; |
| 454 | if (blkno < dbtofsb(bp->b_blkno)) { |
| 455 | bp->b_command = TS_SFORW; |
| 456 | tc->c_repcnt = dbtofsb(bp->b_blkno) - blkno; |
| 457 | } else { |
| 458 | bp->b_command = TS_SREV; |
| 459 | tc->c_repcnt = blkno - dbtofsb(bp->b_blkno); |
| 460 | } |
| 461 | dobpcmd: |
| 462 | /* |
| 463 | * Do the command in bp. |
| 464 | */ |
| 465 | tc->c_cmd = TS_ACK | TS_CVC | TS_IE | bp->b_command; |
| 466 | addr->tsdb = sc->sc_uba; |
| 467 | return; |
| 468 | |
| 469 | next: |
| 470 | /* |
| 471 | * Done with this operation due to error or |
| 472 | * the fact that it doesn't do anything. |
| 473 | * Release UBA resources (if any), dequeue |
| 474 | * the transfer and continue processing this slave. |
| 475 | */ |
| 476 | if (um->um_ubinfo) |
| 477 | ubadone(um); |
| 478 | um->um_tab.b_errcnt = 0; |
| 479 | um->um_tab.b_actf->b_actf = bp->av_forw; |
| 480 | iodone(bp); |
| 481 | goto loop; |
| 482 | } |
| 483 | |
| 484 | /* |
| 485 | * The UNIBUS resources we needed have been |
| 486 | * allocated to us; start the device. |
| 487 | */ |
| 488 | tsdgo(um) |
| 489 | register struct uba_ctlr *um; |
| 490 | { |
| 491 | register struct tsdevice *addr = (struct tsdevice *)um->um_addr; |
| 492 | register struct ts_softc *sc = &ts_softc[um->um_ctlr]; |
| 493 | register int i; |
| 494 | |
| 495 | i = um->um_ubinfo & 0777777; |
| 496 | sc->sc_cmd.c_loba = i; |
| 497 | sc->sc_cmd.c_hiba = (i>>16)&3; |
| 498 | addr->tsdb = sc->sc_uba; |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * Ts interrupt routine. |
| 503 | */ |
| 504 | /*ARGSUSED*/ |
| 505 | tsintr(ts11) |
| 506 | int ts11; |
| 507 | { |
| 508 | register struct buf *bp; |
| 509 | register struct uba_ctlr *um = tsminfo[ts11]; |
| 510 | register struct tsdevice *addr; |
| 511 | register struct ts_softc *sc; |
| 512 | int tsunit; |
| 513 | register state; |
| 514 | |
| 515 | if ((bp = um->um_tab.b_actf->b_actf) == NULL) |
| 516 | return; |
| 517 | tsunit = TSUNIT(bp->b_dev); |
| 518 | addr = (struct tsdevice *)tsdinfo[tsunit]->ui_addr; |
| 519 | /* |
| 520 | * If last command was a rewind, and tape is still |
| 521 | * rewinding, wait for the rewind complete interrupt. |
| 522 | * |
| 523 | * SHOULD NEVER GET AN INTERRUPT IN THIS STATE. |
| 524 | */ |
| 525 | if (um->um_tab.b_active == SREW) { |
| 526 | um->um_tab.b_active = SCOM; |
| 527 | if ((addr->tssr&TS_SSR) == 0) |
| 528 | return; |
| 529 | } |
| 530 | /* |
| 531 | * An operation completed... record status |
| 532 | */ |
| 533 | sc = &ts_softc[tsunit]; |
| 534 | if ((bp->b_flags & B_READ) == 0) |
| 535 | sc->sc_lastiow = 1; |
| 536 | state = um->um_tab.b_active; |
| 537 | um->um_tab.b_active = 0; |
| 538 | /* |
| 539 | * Check for errors. |
| 540 | */ |
| 541 | if (addr->tssr&TS_SC) { |
| 542 | switch (addr->tssr & TS_TC) { |
| 543 | case TS_UNREC: /* unrecoverable */ |
| 544 | case TS_FATAL: /* fatal error */ |
| 545 | case TS_ATTN: /* attention (shouldn't happen) */ |
| 546 | case TS_RECNM: /* recoverable, no motion */ |
| 547 | break; |
| 548 | |
| 549 | case TS_SUCC: /* success termination */ |
| 550 | printf("ts%d: success\n", TSUNIT(minor(bp->b_dev))); |
| 551 | goto ignoreerr; |
| 552 | |
| 553 | case TS_ALERT: /* tape status alert */ |
| 554 | /* |
| 555 | * If we hit the end of the tape file, |
| 556 | * update our position. |
| 557 | */ |
| 558 | if (sc->sc_sts.s_xs0 & (TS_TMK|TS_EOT)) { |
| 559 | tsseteof(bp); /* set blkno and nxrec */ |
| 560 | state = SCOM; /* force completion */ |
| 561 | /* |
| 562 | * Stuff bc so it will be unstuffed correctly |
| 563 | * later to get resid. |
| 564 | */ |
| 565 | sc->sc_sts.s_rbpcr = bp->b_bcount; |
| 566 | goto opdone; |
| 567 | } |
| 568 | /* |
| 569 | * If we were reading raw tape and the record was too long |
| 570 | * or too short, then we don't consider this an error. |
| 571 | */ |
| 572 | if (bp == &rtsbuf[TSUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && |
| 573 | sc->sc_sts.s_xs0&(TS_RLS|TS_RLL)) |
| 574 | goto ignoreerr; |
| 575 | case TS_RECOV: /* recoverable, tape moved */ |
| 576 | /* |
| 577 | * If this was an i/o operation retry up to 8 times. |
| 578 | */ |
| 579 | if (state==SIO) { |
| 580 | if (++um->um_tab.b_errcnt < 7) { |
| 581 | ubadone(um); |
| 582 | goto opcont; |
| 583 | } else |
| 584 | sc->sc_blkno++; |
| 585 | } else { |
| 586 | /* |
| 587 | * Non-i/o errors on non-raw tape |
| 588 | * cause it to close. |
| 589 | */ |
| 590 | if (sc->sc_openf>0 && bp != &rtsbuf[TSUNIT(bp->b_dev)]) |
| 591 | sc->sc_openf = -1; |
| 592 | } |
| 593 | break; |
| 594 | |
| 595 | case TS_REJECT: /* function reject */ |
| 596 | if (state == SIO && sc->sc_sts.s_xs0 & TS_WLE) |
| 597 | printf("ts%d: write locked\n", TSUNIT(bp->b_dev)); |
| 598 | if ((sc->sc_sts.s_xs0 & TS_ONL) == 0) |
| 599 | printf("ts%d: offline\n", TSUNIT(bp->b_dev)); |
| 600 | break; |
| 601 | } |
| 602 | /* |
| 603 | * Couldn't recover error |
| 604 | */ |
| 605 | printf("ts%d: hard error bn%d xs0=%b", TSUNIT(bp->b_dev), |
| 606 | bp->b_blkno, sc->sc_sts.s_xs0, TSXS0_BITS); |
| 607 | if (sc->sc_sts.s_xs1) |
| 608 | printf(" xs1=%b", sc->sc_sts.s_xs1, TSXS1_BITS); |
| 609 | if (sc->sc_sts.s_xs2) |
| 610 | printf(" xs2=%b", sc->sc_sts.s_xs2, TSXS2_BITS); |
| 611 | if (sc->sc_sts.s_xs3) |
| 612 | printf(" xs3=%b", sc->sc_sts.s_xs3, TSXS3_BITS); |
| 613 | printf("\n"); |
| 614 | bp->b_flags |= B_ERROR; |
| 615 | goto opdone; |
| 616 | } |
| 617 | /* |
| 618 | * Advance tape control FSM. |
| 619 | */ |
| 620 | ignoreerr: |
| 621 | switch (state) { |
| 622 | |
| 623 | case SIO: |
| 624 | /* |
| 625 | * Read/write increments tape block number |
| 626 | */ |
| 627 | sc->sc_blkno++; |
| 628 | goto opdone; |
| 629 | |
| 630 | case SCOM: |
| 631 | /* |
| 632 | * For forward/backward space record update current position. |
| 633 | */ |
| 634 | if (bp == &ctsbuf[TSUNIT(bp->b_dev)]) |
| 635 | switch (bp->b_command) { |
| 636 | |
| 637 | case TS_SFORW: |
| 638 | sc->sc_blkno += bp->b_repcnt; |
| 639 | break; |
| 640 | |
| 641 | case TS_SREV: |
| 642 | sc->sc_blkno -= bp->b_repcnt; |
| 643 | break; |
| 644 | } |
| 645 | goto opdone; |
| 646 | |
| 647 | case SSEEK: |
| 648 | sc->sc_blkno = dbtofsb(bp->b_blkno); |
| 649 | goto opcont; |
| 650 | |
| 651 | default: |
| 652 | panic("tsintr"); |
| 653 | } |
| 654 | opdone: |
| 655 | /* |
| 656 | * Reset error count and remove |
| 657 | * from device queue. |
| 658 | */ |
| 659 | um->um_tab.b_errcnt = 0; |
| 660 | um->um_tab.b_actf->b_actf = bp->av_forw; |
| 661 | bp->b_resid = sc->sc_sts.s_rbpcr; |
| 662 | ubadone(um); |
| 663 | iodone(bp); |
| 664 | if (um->um_tab.b_actf->b_actf == 0) |
| 665 | return; |
| 666 | opcont: |
| 667 | tsstart(um); |
| 668 | } |
| 669 | |
| 670 | tsseteof(bp) |
| 671 | register struct buf *bp; |
| 672 | { |
| 673 | register int tsunit = TSUNIT(bp->b_dev); |
| 674 | register struct ts_softc *sc = &ts_softc[tsunit]; |
| 675 | |
| 676 | if (bp == &ctsbuf[TSUNIT(bp->b_dev)]) { |
| 677 | if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { |
| 678 | /* reversing */ |
| 679 | sc->sc_nxrec = dbtofsb(bp->b_blkno) - sc->sc_sts.s_rbpcr; |
| 680 | sc->sc_blkno = sc->sc_nxrec; |
| 681 | } else { |
| 682 | /* spacing forward */ |
| 683 | sc->sc_blkno = dbtofsb(bp->b_blkno) + sc->sc_sts.s_rbpcr; |
| 684 | sc->sc_nxrec = sc->sc_blkno - 1; |
| 685 | } |
| 686 | return; |
| 687 | } |
| 688 | /* eof on read */ |
| 689 | sc->sc_nxrec = dbtofsb(bp->b_blkno); |
| 690 | } |
| 691 | |
| 692 | tsread(dev) |
| 693 | dev_t dev; |
| 694 | { |
| 695 | |
| 696 | tsphys(dev); |
| 697 | if (u.u_error) |
| 698 | return; |
| 699 | physio(tsstrategy, &rtsbuf[TSUNIT(dev)], dev, B_READ, minphys); |
| 700 | } |
| 701 | |
| 702 | tswrite(dev) |
| 703 | dev_t dev; |
| 704 | { |
| 705 | |
| 706 | tsphys(dev); |
| 707 | if (u.u_error) |
| 708 | return; |
| 709 | physio(tsstrategy, &rtsbuf[TSUNIT(dev)], dev, B_WRITE, minphys); |
| 710 | } |
| 711 | |
| 712 | /* |
| 713 | * Check that a raw device exists. |
| 714 | * If it does, set up sc_blkno and sc_nxrec |
| 715 | * so that the tape will appear positioned correctly. |
| 716 | */ |
| 717 | tsphys(dev) |
| 718 | dev_t dev; |
| 719 | { |
| 720 | register int tsunit = TSUNIT(dev); |
| 721 | register daddr_t a; |
| 722 | register struct ts_softc *sc; |
| 723 | register struct uba_device *ui; |
| 724 | |
| 725 | if (tsunit >= NTS || (ui=tsdinfo[tsunit]) == 0 || ui->ui_alive == 0) { |
| 726 | u.u_error = ENXIO; |
| 727 | return; |
| 728 | } |
| 729 | sc = &ts_softc[tsunit]; |
| 730 | a = dbtofsb(u.u_offset >> 9); |
| 731 | sc->sc_blkno = a; |
| 732 | sc->sc_nxrec = a + 1; |
| 733 | } |
| 734 | |
| 735 | tsreset(uban) |
| 736 | int uban; |
| 737 | { |
| 738 | register struct uba_ctlr *um; |
| 739 | register struct uba_device *ui; |
| 740 | register struct buf *dp; |
| 741 | register ts11; |
| 742 | |
| 743 | for (ts11 = 0; ts11 < NTS; ts11++) { |
| 744 | if ((um = tsminfo[ts11]) == 0 || um->um_alive == 0 || |
| 745 | um->um_ubanum != uban) |
| 746 | continue; |
| 747 | printf(" ts%d", ts11); |
| 748 | um->um_tab.b_active = 0; |
| 749 | um->um_tab.b_actf = um->um_tab.b_actl = 0; |
| 750 | if (ts_softc[ts11].sc_openf > 0) |
| 751 | ts_softc[ts11].sc_openf = -1; |
| 752 | if (um->um_ubinfo) { |
| 753 | printf("<%d>", (um->um_ubinfo>>28)&0xf); |
| 754 | ubadone(um); |
| 755 | } |
| 756 | if ((ui = tsdinfo[ts11]) && ui->ui_mi == um && ui->ui_alive) { |
| 757 | dp = &tsutab[ts11]; |
| 758 | dp->b_active = 0; |
| 759 | dp->b_forw = 0; |
| 760 | if (um->um_tab.b_actf == NULL) |
| 761 | um->um_tab.b_actf = dp; |
| 762 | else |
| 763 | um->um_tab.b_actl->b_forw = dp; |
| 764 | um->um_tab.b_actl = dp; |
| 765 | } |
| 766 | (void) tsinit(ts11); |
| 767 | tsstart(um); |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | /*ARGSUSED*/ |
| 772 | tsioctl(dev, cmd, addr, flag) |
| 773 | caddr_t addr; |
| 774 | dev_t dev; |
| 775 | { |
| 776 | int tsunit = TSUNIT(dev); |
| 777 | register struct ts_softc *sc = &ts_softc[tsunit]; |
| 778 | register struct buf *bp = &ctsbuf[TSUNIT(dev)]; |
| 779 | register callcount; |
| 780 | int fcount; |
| 781 | struct mtop mtop; |
| 782 | struct mtget mtget; |
| 783 | /* we depend of the values and order of the MT codes here */ |
| 784 | static tsops[] = |
| 785 | {TS_WEOF,TS_SFORWF,TS_SREVF,TS_SFORW,TS_SREV,TS_REW,TS_OFFL,TS_SENSE}; |
| 786 | |
| 787 | switch (cmd) { |
| 788 | case MTIOCTOP: /* tape operation */ |
| 789 | if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { |
| 790 | u.u_error = EFAULT; |
| 791 | return; |
| 792 | } |
| 793 | switch(mtop.mt_op) { |
| 794 | case MTWEOF: |
| 795 | callcount = mtop.mt_count; |
| 796 | fcount = 1; |
| 797 | break; |
| 798 | case MTFSF: case MTBSF: |
| 799 | case MTFSR: case MTBSR: |
| 800 | callcount = 1; |
| 801 | fcount = mtop.mt_count; |
| 802 | break; |
| 803 | case MTREW: case MTOFFL: case MTNOP: |
| 804 | callcount = 1; |
| 805 | fcount = 1; |
| 806 | break; |
| 807 | default: |
| 808 | u.u_error = ENXIO; |
| 809 | return; |
| 810 | } |
| 811 | if (callcount <= 0 || fcount <= 0) { |
| 812 | u.u_error = ENXIO; |
| 813 | return; |
| 814 | } |
| 815 | while (--callcount >= 0) { |
| 816 | tscommand(dev, tsops[mtop.mt_op], fcount); |
| 817 | if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && |
| 818 | bp->b_resid) { |
| 819 | u.u_error = EIO; |
| 820 | break; |
| 821 | } |
| 822 | if ((bp->b_flags&B_ERROR) || sc->sc_sts.s_xs0&TS_BOT) |
| 823 | break; |
| 824 | } |
| 825 | geterror(bp); |
| 826 | return; |
| 827 | case MTIOCGET: |
| 828 | mtget.mt_dsreg = 0; |
| 829 | mtget.mt_erreg = sc->sc_sts.s_xs0; |
| 830 | mtget.mt_resid = sc->sc_resid; |
| 831 | mtget.mt_type = MT_ISTS; |
| 832 | if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) |
| 833 | u.u_error = EFAULT; |
| 834 | return; |
| 835 | default: |
| 836 | u.u_error = ENXIO; |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | #define DBSIZE 20 |
| 841 | |
| 842 | tsdump() |
| 843 | { |
| 844 | register struct uba_device *ui; |
| 845 | register struct uba_regs *up; |
| 846 | register struct tsdevice *addr; |
| 847 | int blk, num; |
| 848 | int start; |
| 849 | |
| 850 | start = 0; |
| 851 | num = maxfree; |
| 852 | #define phys(a,b) ((b)((int)(a)&0x7fffffff)) |
| 853 | if (tsdinfo[0] == 0) |
| 854 | return (ENXIO); |
| 855 | ui = phys(tsdinfo[0], struct uba_device *); |
| 856 | up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; |
| 857 | ubainit(up); |
| 858 | DELAY(1000000); |
| 859 | addr = (struct tsdevice *)ui->ui_physaddr; |
| 860 | addr->tssr = 0; |
| 861 | tswait(addr); |
| 862 | while (num > 0) { |
| 863 | blk = num > DBSIZE ? DBSIZE : num; |
| 864 | tsdwrite(start, blk, addr, up); |
| 865 | start += blk; |
| 866 | num -= blk; |
| 867 | } |
| 868 | tseof(addr); |
| 869 | tseof(addr); |
| 870 | tswait(addr); |
| 871 | if (addr->tssr&TS_SC) |
| 872 | return (EIO); |
| 873 | addr->tssr = 0; |
| 874 | tswait(addr); |
| 875 | return (0); |
| 876 | } |
| 877 | |
| 878 | tsdwrite(dbuf, num, addr, up) |
| 879 | register dbuf, num; |
| 880 | register struct tsdevice *addr; |
| 881 | struct uba_regs *up; |
| 882 | { |
| 883 | register struct pte *io; |
| 884 | register int npf; |
| 885 | |
| 886 | tswait(addr); |
| 887 | io = up->uba_map; |
| 888 | npf = num+1; |
| 889 | while (--npf != 0) |
| 890 | *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); |
| 891 | *(int *)io = 0; |
| 892 | #ifdef notyet |
| 893 | addr->tsbc = -(num*NBPG); |
| 894 | addr->tsba = 0; |
| 895 | addr->tscs = TS_WCOM | TM_GO; |
| 896 | #endif |
| 897 | } |
| 898 | |
| 899 | tswait(addr) |
| 900 | register struct tsdevice *addr; |
| 901 | { |
| 902 | register s; |
| 903 | |
| 904 | do |
| 905 | s = addr->tssr; |
| 906 | while ((s & TS_SSR) == 0); |
| 907 | } |
| 908 | |
| 909 | tseof(addr) |
| 910 | struct tsdevice *addr; |
| 911 | { |
| 912 | |
| 913 | tswait(addr); |
| 914 | #ifdef notyet |
| 915 | addr->tscs = TS_WEOF | TM_GO; |
| 916 | #endif |
| 917 | } |
| 918 | #endif |