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sys/dev/qbus/ts.c
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1 /* $NetBSD: ts.c,v 1.36 2022/04/17 21:24:53 andvar Exp $ */ 2 3 /*- 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)tmscp.c 7.16 (Berkeley) 5/9/91 32 */ 33 34 /* 35 * sccsid = "@(#)tmscp.c 1.24 (ULTRIX) 1/21/86"; 36 */ 37 38 /************************************************************************ 39 * * 40 * Licensed from Digital Equipment Corporation * 41 * Copyright (c) * 42 * Digital Equipment Corporation * 43 * Maynard, Massachusetts * 44 * 1985, 1986 * 45 * All rights reserved. * 46 * * 47 * The Information in this software is subject to change * 48 * without notice and should not be construed as a commitment * 49 * by Digital Equipment Corporation. Digital makes no * 50 * representations about the suitability of this software for * 51 * any purpose. It is supplied "As Is" without expressed or * 52 * implied warranty. * 53 * * 54 * If the Regents of the University of California or its * 55 * licensees modify the software in a manner creating * 56 * derivative copyright rights, appropriate copyright * 57 * legends may be placed on the derivative work in addition * 58 * to that set forth above. * 59 * * 60 ************************************************************************/ 61 62 /* 63 * TSV05/TS05 device driver, written by Bertram Barth. 64 * 65 * should be TS11 compatible (untested) 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: ts.c,v 1.36 2022/04/17 21:24:53 andvar Exp $"); 70 71 #undef TSDEBUG 72 73 /* 74 * TODO: 75 * 76 * Keep track of tape position so that lseek et al works. 77 * Use tprintf to inform the user, not the system console. 78 */ 79 80 81 #include <sys/param.h> 82 #include <sys/systm.h> 83 #include <sys/kernel.h> 84 #include <sys/buf.h> 85 #include <sys/bufq.h> 86 #include <sys/conf.h> 87 #include <sys/device.h> 88 #include <sys/errno.h> 89 #include <sys/file.h> 90 #include <sys/syslog.h> 91 #include <sys/ioctl.h> 92 #include <sys/mtio.h> 93 #include <sys/uio.h> 94 #include <sys/proc.h> 95 96 #include <sys/bus.h> 97 98 #include <dev/qbus/ubareg.h> 99 #include <dev/qbus/ubavar.h> 100 101 #include <dev/qbus/tsreg.h> 102 103 #include "ioconf.h" 104 105 struct ts { 106 struct cmd cmd; /* command packet */ 107 struct chr chr; /* characteristics packet */ 108 struct status status; /* status packet */ 109 }; 110 111 /* 112 * Software status, per controller. 113 * also status per tape-unit, since only one unit per controller 114 * (thus we have no struct ts_info) 115 */ 116 struct ts_softc { 117 device_t sc_dev; /* Autoconf ... */ 118 struct uba_softc *sc_uh; /* the parent UBA */ 119 struct uba_unit sc_unit; /* Struct common for UBA to talk */ 120 struct evcnt sc_intrcnt; /* Interrupt counting */ 121 struct ubinfo sc_ui; /* mapping info for struct ts */ 122 struct uba_unit sc_uu; /* Struct for UBA to communicate */ 123 bus_space_tag_t sc_iot; 124 bus_addr_t sc_ioh; 125 bus_dma_tag_t sc_dmat; 126 bus_dmamap_t sc_dmam; 127 volatile struct ts *sc_vts; /* Memory address of ts struct */ 128 struct ts *sc_bts; /* Unibus address of ts struct */ 129 int sc_type; /* TS11 or TS05? */ 130 short sc_waddr; /* Value to write to TSDB */ 131 struct bufq_state *sc_bufq; /* pending I/O requests */ 132 133 short sc_mapped; /* Unibus map allocated ? */ 134 short sc_state; /* see below: ST_xxx */ 135 short sc_rtc; /* retry count for lcmd */ 136 short sc_openf; /* lock against multiple opens */ 137 short sc_liowf; /* last operation was write */ 138 struct buf ts_cbuf; /* internal cmd buffer (for ioctls) */ 139 }; 140 141 #define TS_WCSR(csr, val) \ 142 bus_space_write_2(sc->sc_iot, sc->sc_ioh, csr, val) 143 #define TS_RCSR(csr) \ 144 bus_space_read_2(sc->sc_iot, sc->sc_ioh, csr) 145 146 #define LOWORD(x) ((int)(x) & 0xffff) 147 #define HIWORD(x) (((int)(x) >> 16) & 0x3f) 148 149 #define TYPE_TS11 0 150 #define TYPE_TS05 1 151 #define TYPE_TU80 2 152 153 #define TS_INVALID 0 154 #define TS_INIT 1 155 #define TS_RUNNING 2 156 #define TS_FASTREPOS 3 157 158 static void tsintr(void *); 159 static void tsinit(struct ts_softc *); 160 static void tscommand(struct ts_softc *, dev_t, int, int); 161 static int tsstart(struct ts_softc *, int); 162 static void tswchar(struct ts_softc *); 163 static bool tsreset(struct ts_softc *); 164 static int tsmatch(device_t, cfdata_t, void *); 165 static void tsattach(device_t, device_t, void *); 166 static int tsready(struct uba_unit *); 167 168 CFATTACH_DECL_NEW(ts, sizeof(struct ts_softc), 169 tsmatch, tsattach, NULL, NULL); 170 171 dev_type_open(tsopen); 172 dev_type_close(tsclose); 173 dev_type_read(tsread); 174 dev_type_write(tswrite); 175 dev_type_ioctl(tsioctl); 176 dev_type_strategy(tsstrategy); 177 dev_type_dump(tsdump); 178 179 const struct bdevsw ts_bdevsw = { 180 .d_open = tsopen, 181 .d_close = tsclose, 182 .d_strategy = tsstrategy, 183 .d_ioctl = tsioctl, 184 .d_dump = tsdump, 185 .d_psize = nosize, 186 .d_discard = nodiscard, 187 .d_flag = D_TAPE 188 }; 189 190 const struct cdevsw ts_cdevsw = { 191 .d_open = tsopen, 192 .d_close = tsclose, 193 .d_read = tsread, 194 .d_write = tswrite, 195 .d_ioctl = tsioctl, 196 .d_stop = nostop, 197 .d_tty = notty, 198 .d_poll = nopoll, 199 .d_mmap = nommap, 200 .d_kqfilter = nokqfilter, 201 .d_discard = nodiscard, 202 .d_flag = D_TAPE 203 }; 204 205 /* Bits in minor device */ 206 #define TS_UNIT(dev) (minor(dev)&03) 207 #define TS_HIDENSITY 010 208 209 #define TS_PRI LOG_INFO 210 211 212 /* 213 * Probe for device. If found, try to raise an interrupt. 214 */ 215 int 216 tsmatch(device_t parent, cfdata_t match, void *aux) 217 { 218 struct ts_softc ssc; 219 struct ts_softc *sc = &ssc; 220 struct uba_attach_args *ua = aux; 221 int i; 222 223 sc->sc_iot = ua->ua_iot; 224 sc->sc_ioh = ua->ua_ioh; 225 sc->sc_mapped = 0; 226 sc->sc_uh = device_private(parent); 227 228 /* Try to reset the device */ 229 for (i = 0; i < 3; i++) { 230 if (tsreset(sc)) 231 break; 232 } 233 234 if (i == 3) 235 return 0; 236 237 tsinit(sc); 238 tswchar(sc); /* write charact. to enable interrupts */ 239 /* completion of this will raise the intr. */ 240 241 DELAY(1000000); /* Wait for interrupt */ 242 ubmemfree(sc->sc_uh, &sc->sc_ui); 243 return 1; 244 } 245 246 /* 247 */ 248 void 249 tsattach(device_t parent, device_t self, void *aux) 250 { 251 struct ts_softc *sc = device_private(self); 252 struct uba_attach_args *ua = aux; 253 int error; 254 const char *t; 255 256 sc->sc_dev = self; 257 sc->sc_uh = device_private(parent); 258 sc->sc_iot = ua->ua_iot; 259 sc->sc_ioh = ua->ua_ioh; 260 sc->sc_dmat = ua->ua_dmat; 261 262 sc->sc_uu.uu_dev = self; 263 sc->sc_uu.uu_ready = tsready; 264 265 tsinit(sc); /* reset and map */ 266 267 error = bus_dmamap_create(sc->sc_dmat, (64*1024), 16, (64*1024), 268 0, BUS_DMA_NOWAIT, &sc->sc_dmam); 269 if (error) { 270 aprint_error(": failed create DMA map %d\n", error); 271 return; 272 } 273 274 bufq_alloc(&sc->sc_bufq, "fcfs", 0); 275 276 /* 277 * write the characteristics (again) 278 */ 279 sc->sc_state = TS_INIT; /* tsintr() checks this ... */ 280 tswchar(sc); 281 if (tsleep(sc, PRIBIO, "tsattach", 100)) { 282 aprint_error(": failed SET CHARACTERISTICS\n"); 283 return; 284 } 285 286 sc->sc_state = TS_RUNNING; 287 if (sc->sc_uh->uh_type == UBA_UBA) { 288 if (sc->sc_vts->status.xst2 & TS_SF_TU80) { 289 sc->sc_type = TYPE_TU80; 290 t = "TU80"; 291 } else { 292 sc->sc_type = TYPE_TS11; 293 t = "TS11"; 294 } 295 } else { 296 sc->sc_type = TYPE_TS05; 297 t = "TS05"; 298 } 299 300 aprint_normal(": %s\n", t); 301 aprint_normal_dev(sc->sc_dev, 302 "rev %d, extended features %s, transport %s\n", 303 (sc->sc_vts->status.xst2 & TS_SF_MCRL) >> 2, 304 (sc->sc_vts->status.xst2 & TS_SF_EFES ? "enabled" : "disabled"), 305 (TS_RCSR(TSSR) & TS_OFL ? "offline" : "online")); 306 307 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, tsintr, 308 sc, &sc->sc_intrcnt); 309 evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 310 device_xname(sc->sc_dev), "intr"); 311 } 312 313 /* 314 * Initialize a TS device. Set up UBA mapping registers, 315 * initialize data structures, what else ??? 316 */ 317 void 318 tsinit(struct ts_softc *sc) 319 { 320 if (sc->sc_mapped == 0) { 321 322 /* 323 * Map the communications area and command and message 324 * buffer into Unibus address space. 325 */ 326 sc->sc_ui.ui_size = sizeof(struct ts); 327 if (ubmemalloc(sc->sc_uh, &sc->sc_ui, UBA_CANTWAIT)) 328 return; 329 sc->sc_vts = (void *)sc->sc_ui.ui_vaddr; 330 sc->sc_bts = (void *)sc->sc_ui.ui_baddr; 331 sc->sc_waddr = sc->sc_ui.ui_baddr | 332 ((sc->sc_ui.ui_baddr >> 16) & 3); 333 sc->sc_mapped = 1; 334 } 335 tsreset(sc); 336 } 337 338 /* 339 * Execute a (ioctl) command on the tape drive a specified number of times. 340 * This routine sets up a buffer and calls the strategy routine which 341 * issues the command to the controller. 342 */ 343 void 344 tscommand(struct ts_softc *sc, dev_t dev, int cmd, int count) 345 { 346 struct buf *bp; 347 348 #ifdef TSDEBUG 349 printf("tscommand (%x, %d)\n", cmd, count); 350 #endif 351 352 bp = &sc->ts_cbuf; 353 354 mutex_enter(&bufcache_lock); 355 while (bp->b_cflags & BC_BUSY) { 356 /* 357 * This special check is because BC_BUSY never 358 * gets cleared in the non-waiting rewind case. ??? 359 */ 360 if (bp->b_bcount == 0 && (bp->b_oflags & BO_DONE)) 361 break; 362 if (bbusy(bp, false, 0, NULL) == 0) 363 break; 364 /* check MOT-flag !!! */ 365 } 366 bp->b_flags = B_READ; 367 mutex_exit(&bufcache_lock); 368 369 /* 370 * Load the buffer. The b_count field gets used to hold the command 371 * count. the b_resid field gets used to hold the command mnemonic. 372 * These 2 fields are "known" to be "safe" to use for this purpose. 373 * (Most other drivers also use these fields in this way.) 374 */ 375 bp->b_dev = dev; 376 bp->b_bcount = count; 377 bp->b_resid = cmd; 378 bp->b_blkno = 0; 379 bp->b_oflags = 0; 380 bp->b_objlock = &buffer_lock; 381 tsstrategy(bp); 382 /* 383 * In case of rewind from close, don't wait. 384 * This is the only case where count can be 0. 385 */ 386 if (count == 0) 387 return; 388 biowait(bp); 389 mutex_enter(&bufcache_lock); 390 cv_broadcast(&bp->b_busy); 391 bp->b_cflags = 0; 392 mutex_exit(&bufcache_lock); 393 } 394 395 /* 396 * Start an I/O operation on TS05 controller 397 */ 398 int 399 tsstart(struct ts_softc *sc, int isloaded) 400 { 401 struct buf *bp; 402 int cmd; 403 404 bp = bufq_peek(sc->sc_bufq); 405 if (bp == NULL) { 406 return 0; 407 } 408 #ifdef TSDEBUG 409 printf("buf: %p bcount %ld blkno %d\n", bp, bp->b_bcount, bp->b_blkno); 410 #endif 411 /* 412 * Check if command is an ioctl or not (ie. read or write). 413 * If it's an ioctl then just set the flags for later use; 414 * For other commands attempt to setup a buffer pointer. 415 */ 416 if (bp == &sc->ts_cbuf) { 417 switch ((int)bp->b_resid) { 418 case MTWEOF: 419 cmd = TS_CMD_WTM; 420 break; 421 case MTFSF: 422 cmd = TS_CMD_STMF; 423 sc->sc_vts->cmd.cw1 = bp->b_bcount; 424 break; 425 case MTBSF: 426 cmd = TS_CMD_STMR; 427 sc->sc_vts->cmd.cw1 = bp->b_bcount; 428 break; 429 case MTFSR: 430 cmd = TS_CMD_SRF; 431 sc->sc_vts->cmd.cw1 = bp->b_bcount; 432 break; 433 case MTBSR: 434 cmd = TS_CMD_SRR; 435 sc->sc_vts->cmd.cw1 = bp->b_bcount; 436 break; 437 case MTREW: 438 cmd = TS_CMD_RWND; 439 break; 440 case MTOFFL: 441 cmd = TS_CMD_RWUL; 442 break; 443 case MTNOP: 444 cmd = TS_CMD_STAT; 445 break; 446 default: 447 aprint_error_dev(sc->sc_dev, "bad ioctl %d\n", 448 (int)bp->b_resid); 449 /* Need a no-op. get status */ 450 cmd = TS_CMD_STAT; 451 } /* end switch (bp->b_resid) */ 452 } else { 453 if (isloaded == 0) { 454 /* 455 * now we try to map the buffer into uba map space (???) 456 */ 457 if (bus_dmamap_load(sc->sc_dmat, sc->sc_dmam, 458 bp->b_data, 459 bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT)) { 460 uba_enqueue(&sc->sc_uu); 461 return 0; 462 } 463 sc->sc_rtc = 0; 464 } 465 sc->sc_vts->cmd.cw1 = LOWORD(sc->sc_dmam->dm_segs[0].ds_addr); 466 sc->sc_vts->cmd.cw2 = HIWORD(sc->sc_dmam->dm_segs[0].ds_addr); 467 sc->sc_vts->cmd.cw3 = bp->b_bcount; 468 bp->b_error = 0; /* Used for error count */ 469 #ifdef TSDEBUG 470 printf("tsstart-1: err %d\n", bp->b_error); 471 #endif 472 if (bp->b_flags & B_READ) 473 cmd = TS_CMD_RNF; 474 else 475 cmd = TS_CMD_WD; 476 } 477 478 /* 479 * Now that the command-buffer is setup, give it to the controller 480 */ 481 sc->sc_vts->cmd.cmdr = TS_CF_ACK | TS_CF_IE | cmd; 482 #ifdef TSDEBUG 483 printf("tsstart: sending cmdr %x\n", sc->sc_vts->cmd.cmdr); 484 #endif 485 TS_WCSR(TSDB, sc->sc_waddr); 486 return 1; 487 } 488 489 /* 490 * Called when there are free uba resources. 491 */ 492 int 493 tsready(struct uba_unit *uu) 494 { 495 struct ts_softc *sc = device_private(uu->uu_dev); 496 struct buf *bp = bufq_peek(sc->sc_bufq); 497 498 if (bus_dmamap_load(sc->sc_dmat, sc->sc_dmam, bp->b_data, 499 bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT)) 500 return 0; 501 502 tsstart(sc, 1); 503 return 1; 504 } 505 506 /* 507 * initialize the controller by sending WRITE CHARACTERISTICS command. 508 * contents of command- and message-buffer are assembled during this 509 * function. 510 */ 511 void 512 tswchar(struct ts_softc *sc) 513 { 514 /* 515 * assemble and send "WRITE CHARACTERISTICS" command 516 */ 517 518 sc->sc_vts->cmd.cmdr = TS_CF_ACK | TS_CF_IE | TS_CMD_WCHAR; 519 sc->sc_vts->cmd.cw1 = LOWORD(&sc->sc_bts->chr); 520 sc->sc_vts->cmd.cw2 = HIWORD(&sc->sc_bts->chr); 521 sc->sc_vts->cmd.cw3 = 010; /* size of charact.-data */ 522 523 sc->sc_vts->chr.sadrl = LOWORD(&sc->sc_bts->status); 524 sc->sc_vts->chr.sadrh = HIWORD(&sc->sc_bts->status); 525 sc->sc_vts->chr.onesix = (sc->sc_type == TYPE_TS05 ? 020 : 016); 526 sc->sc_vts->chr.chrw = TS_WC_ESS; 527 sc->sc_vts->chr.xchrw = TS_WCX_HSP|TS_WCX_RBUF|TS_WCX_WBUF; 528 529 TS_WCSR(TSDB, sc->sc_waddr); 530 } 531 532 /* 533 * Reset the TS11. Return 1 if failed, 0 if succeeded. 534 */ 535 bool 536 tsreset(struct ts_softc *sc) 537 { 538 int timeout; 539 540 /* 541 * reset ctlr by writing into TSSR, then write characteristics 542 */ 543 timeout = 0; /* timeout in 10 seconds */ 544 TS_WCSR(TSSR, 0); /* start initialization */ 545 while ((TS_RCSR(TSSR) & TS_SSR) == 0) { 546 DELAY(10000); 547 if (timeout++ > 1000) 548 return false; 549 } 550 return true; 551 } 552 553 static void 554 prtstat(struct ts_softc *sc, int sr) 555 { 556 char buf[100]; 557 558 snprintb(buf, sizeof(buf), TS_TSSR_BITS, sr); 559 aprint_normal_dev(sc->sc_dev, "TSSR=%s\n", buf); 560 snprintb(buf, sizeof(buf), TS_XST0_BITS, sc->sc_vts->status.xst0); 561 aprint_normal_dev(sc->sc_dev, "XST0=%s\n", buf); 562 } 563 564 /* 565 * TSV05/TS05 interrupt routine 566 */ 567 static void 568 tsintr(void *arg) 569 { 570 struct ts_softc *sc = arg; 571 struct buf *bp; 572 573 unsigned short sr = TS_RCSR(TSSR); /* save TSSR */ 574 unsigned short mh = sc->sc_vts->status.hdr; /* and msg-header */ 575 /* clear the message header ??? */ 576 577 short ccode = sc->sc_vts->cmd.cmdr & TS_CF_CCODE; 578 579 bp = bufq_peek(sc->sc_bufq); 580 #ifdef TSDEBUG 581 { 582 char buf[100]; 583 snprintb(buf, sizeof(buf), TS_TSSR_BITS, sr); 584 printf("tsintr: sr %x mh %x\n", sr, mh); 585 printf("srbits: %s\n", buf); 586 } 587 #endif 588 /* 589 * There are two different things which can (and should) be checked: 590 * the actual (internal) state and the device's result (tssr/msg.hdr) 591 * 592 * For each state there's only one "normal" interrupt. Anything else 593 * has to be checked more intensively. Thus in a first run according 594 * to the internal state the expected interrupt is checked/handled. 595 * 596 * In a second run the remaining (not yet handled) interrupts are 597 * checked according to the drive's result. 598 */ 599 switch (sc->sc_state) { 600 601 case TS_INVALID: 602 /* 603 * Ignore unsolicited interrupts. 604 */ 605 log(LOG_WARNING, "%s: stray intr [%x,%x]\n", 606 device_xname(sc->sc_dev), sr, mh); 607 return; 608 609 case TS_INIT: 610 /* 611 * Init phase ready. 612 */ 613 wakeup(sc); 614 return; 615 616 case TS_RUNNING: 617 case TS_FASTREPOS: 618 /* 619 * Here we expect interrupts indicating the end of 620 * commands or indicating problems. 621 */ 622 /* 623 * Anything else is handled outside this switch ... 624 */ 625 break; 626 627 default: 628 aprint_error_dev(sc->sc_dev, 629 "unexpected interrupt during state %d [%x,%x]\n", 630 sc->sc_state, sr, mh); 631 return; 632 } 633 634 /* 635 * now we check the termination class. 636 */ 637 switch (sr & TS_TC) { 638 639 case TS_TC_NORM: 640 /* 641 * Normal termination -- The operation is completed 642 * without incident. 643 */ 644 if (sc->sc_state == TS_FASTREPOS) { 645 #ifdef TSDEBUG 646 printf("Fast repos interrupt\n"); 647 #endif 648 /* Fast repos succeeded, start normal data xfer */ 649 sc->sc_state = TS_RUNNING; 650 tsstart(sc, 1); 651 return; 652 } 653 sc->sc_liowf = (ccode == TS_CC_WRITE); 654 break; 655 656 case TS_TC_ATTN: 657 /* 658 * Attention condition -- this code indicates that the 659 * drive has undergone a status change, such as going 660 * off-line or coming on-line. 661 * (Without EAI enabled, no Attention interrupts occur. 662 * drive status changes are signaled by the VCK flag.) 663 */ 664 return; 665 666 case TS_TC_TSA: 667 /* 668 * Tape Status Alert -- A status condition is encountered 669 * that may have significance to the program. Bits of 670 * interest in the extended status registers include 671 * TMK, EOT and RLL. 672 */ 673 #ifdef TSDEBUG 674 { 675 char buf[100]; 676 snprintb(buf, sizeof(buf), 677 TS_XST0_BITS, sc->sc_vts->status.xst0); 678 printf("TSA: sr %x bits %s\n", 679 sc->sc_vts->status.xst0, buf); 680 } 681 #endif 682 if (sc->sc_vts->status.xst0 & TS_SF_TMK) { 683 #ifdef TSDEBUG 684 printf(("Tape Mark detected")); 685 #endif 686 /* Read to end-of-file. No error. */ 687 break; 688 } 689 if (sc->sc_vts->status.xst0 & TS_SF_EOT) { 690 /* End of tape. Bad. */ 691 #ifdef TSDEBUG 692 printf("TS_TC_TSA: EOT\n"); 693 #endif 694 if (bp != NULL) 695 bp->b_error = EIO; 696 break; 697 } 698 if (sc->sc_vts->status.xst0 & TS_SF_RLS) 699 break; 700 #ifndef TSDEBUG 701 { 702 char buf[100]; 703 snprintb(buf, sizeof(buf), 704 TS_XST0_BITS, sc->sc_vts->status.xst0); 705 printf("TSA: sr %x bits %s\n", 706 sc->sc_vts->status.xst0, buf); 707 } 708 #endif 709 break; 710 711 case TS_TC_FR: 712 /* 713 * Function Reject -- The specified function was not 714 * initiated. Bits of interest include OFL, VCK, BOT, 715 * WLE, ILC and ILA. 716 */ 717 if (sr & TS_OFL) 718 printf("tape is off-line.\n"); 719 #ifdef TSDEBUG 720 { 721 char buf[100]; 722 snprintb(buf, sizeof(buf), 723 TS_XST0_BITS, sc->sc_vts->status.xst0); 724 printf("FR: sr %x bits %s\n", 725 sc->sc_vts->status.xst0, buf); 726 } 727 #endif 728 if (sc->sc_vts->status.xst0 & TS_SF_VCK) 729 printf("Volume check\n"); 730 if (sc->sc_vts->status.xst0 & TS_SF_BOT) 731 printf("Start of tape.\n"); 732 if (sc->sc_vts->status.xst0 & TS_SF_WLE) 733 printf("Write Lock Error\n"); 734 if (sc->sc_vts->status.xst0 & TS_SF_EOT) 735 printf("End of tape.\n"); 736 break; 737 738 case TS_TC_TPD: 739 /* 740 * Recoverable Error -- Tape position is a record beyond 741 * what its position was when the function was initiated. 742 * Suggested recovery procedure is to log the error and 743 * issue the appropriate retry command. 744 * 745 * Do a fast repositioning one record back. 746 */ 747 sc->sc_state = TS_FASTREPOS; 748 #ifdef TSDEBUG 749 printf("TS_TC_TPD: errcnt %d\n", sc->sc_rtc); 750 #endif 751 if (sc->sc_rtc++ == 8) { 752 aprint_error_dev(sc->sc_dev, "failed 8 retries\n"); 753 prtstat(sc, sr); 754 if (bp != NULL) 755 bp->b_error = EIO; 756 break; 757 } 758 sc->sc_vts->cmd.cmdr = TS_CF_ACK | TS_CF_IE | TS_CMD_SRR; 759 sc->sc_vts->cmd.cw1 = 1; 760 TS_WCSR(TSDB, sc->sc_waddr); 761 return; 762 763 case TS_TC_TNM: 764 /* 765 * Recoverable Error -- Tape position has not changed. 766 * Suggested recovery procedure is to log the error and 767 * reissue the original command. 768 */ 769 if (sc->sc_rtc++ == 8) { 770 aprint_error_dev(sc->sc_dev, "failed 8 retries\n"); 771 prtstat(sc, sr); 772 if (bp != NULL) 773 bp->b_error = EIO; 774 break; 775 } 776 tsstart(sc, 1); 777 return; 778 779 case TS_TC_TPL: 780 /* 781 * Unrecoverable Error -- Tape position has been lost. 782 * No valid recovery procedures exist unless the tape 783 * has labels or sequence numbers. 784 */ 785 aprint_error_dev(sc->sc_dev, "tape position lost\n"); 786 if (bp != NULL) 787 bp->b_error = EIO; 788 break; 789 790 case TS_TC_FCE: 791 /* 792 * Fatal subsystem Error -- The subsystem is incapable 793 * of properly performing commands, or at least its 794 * integrity is seriously questionable. Refer to the 795 * fatal class code field in the TSSR register for 796 * additional information on the type of fatal error. 797 */ 798 aprint_error_dev(sc->sc_dev, "fatal controller error\n"); 799 prtstat(sc, sr); 800 break; 801 802 default: 803 aprint_error_dev(sc->sc_dev, 804 "error 0x%x, resetting controller\n", sr & TS_TC); 805 tsreset(sc); 806 } 807 if ((bp = bufq_get(sc->sc_bufq)) != NULL) { 808 #ifdef TSDEBUG 809 printf("tsintr2: que %p\n", bufq_peek(sc->sc_bufq)); 810 #endif 811 if (bp != &sc->ts_cbuf) { /* no ioctl */ 812 bus_dmamap_unload(sc->sc_dmat, sc->sc_dmam); 813 uba_done(sc->sc_uh); 814 } 815 bp->b_resid = sc->sc_vts->status.rbpcr; 816 biodone (bp); 817 } 818 tsstart(sc, 0); 819 } 820 821 822 /* 823 * Open a ts device and set the unit online. If the controller is not 824 * in the run state, call init to initialize the ts controller first. 825 */ 826 int 827 tsopen(dev_t dev, int flag, int type, struct lwp *l) 828 { 829 struct ts_softc *sc = device_lookup_private(&ts_cd, TS_UNIT(dev)); 830 831 if (sc == NULL) 832 return ENXIO; 833 834 if (sc->sc_state < TS_RUNNING) 835 return ENXIO; 836 837 if (sc->sc_openf) 838 return EBUSY; 839 sc->sc_openf = 1; 840 841 /* 842 * check if transport is really online. 843 * (without attention-interrupts enabled, we really don't know 844 * the actual state of the transport. Thus we call get-status 845 * (ie. MTNOP) once and check the actual status.) 846 */ 847 if (TS_RCSR(TSSR) & TS_OFL) { 848 uprintf("%s: transport is offline.\n", device_xname(sc->sc_dev)); 849 sc->sc_openf = 0; 850 return EIO; /* transport is offline */ 851 } 852 tscommand(sc, dev, MTNOP, 1); 853 if ((flag & FWRITE) && (sc->sc_vts->status.xst0 & TS_SF_WLK)) { 854 uprintf("%s: no write ring.\n", device_xname(sc->sc_dev)); 855 sc->sc_openf = 0; 856 return EROFS; 857 } 858 if (sc->sc_vts->status.xst0 & TS_SF_VCK) { 859 sc->sc_vts->cmd.cmdr = TS_CF_CVC|TS_CF_ACK; 860 TS_WCSR(TSDB, sc->sc_waddr); 861 } 862 tscommand(sc, dev, MTNOP, 1); 863 #ifdef TSDEBUG 864 { 865 char buf[100]; 866 snprintb(buf, sizeof(buf), 867 TS_XST0_BITS, sc->sc_vts->status.xst0); 868 printf("tsopen: xst0 %s\n", buf); 869 } 870 #endif 871 sc->sc_liowf = 0; 872 return 0; 873 } 874 875 876 /* 877 * Close tape device. 878 * 879 * If tape was open for writing or last operation was 880 * a write, then write two EOF's and backspace over the last one. 881 * Unless this is a non-rewinding special file, rewind the tape. 882 * 883 * Make the tape available to others, by clearing openf flag. 884 */ 885 int 886 tsclose(dev_t dev, int flag, int type, struct lwp *l) 887 { 888 struct ts_softc *sc = device_lookup_private(&ts_cd, TS_UNIT(dev)); 889 890 if (flag == FWRITE || ((flag & FWRITE) && sc->sc_liowf)) { 891 /* 892 * We are writing two tape marks (EOT), but place the tape 893 * before the second one, so that another write operation 894 * will overwrite the second one and leave and EOF-mark. 895 */ 896 tscommand(sc, dev, MTWEOF, 1); /* Write Tape Mark */ 897 tscommand(sc, dev, MTWEOF, 1); /* Write Tape Mark */ 898 tscommand(sc, dev, MTBSF, 1); /* Skip Tape Marks Reverse */ 899 } 900 901 if ((dev & T_NOREWIND) == 0) 902 tscommand(sc, dev, MTREW, 0); 903 904 sc->sc_openf = 0; 905 sc->sc_liowf = 0; 906 return 0; 907 } 908 909 910 /* 911 * Manage buffers and perform block mode read and write operations. 912 */ 913 void 914 tsstrategy(struct buf *bp) 915 { 916 struct ts_softc *sc = device_lookup_private(&ts_cd, TS_UNIT(bp->b_dev)); 917 bool empty; 918 int s; 919 920 #ifdef TSDEBUG 921 printf("buf: %p bcount %ld blkno %d\n", bp, bp->b_bcount, bp->b_blkno); 922 #endif 923 s = splbio (); 924 empty = (bufq_peek(sc->sc_bufq) == NULL); 925 bufq_put(sc->sc_bufq, bp); 926 if (empty) 927 tsstart(sc, 0); 928 splx(s); 929 } 930 931 932 /* 933 * Catch ioctl commands, and call the "command" routine to do them. 934 */ 935 int 936 tsioctl(dev_t dev, 937 u_long cmd, 938 void *data, 939 int flag, 940 struct lwp *l) 941 { 942 struct buf *bp; 943 struct ts_softc * const sc = device_lookup_private(&ts_cd, TS_UNIT(dev)); 944 struct mtop *mtop; /* mag tape cmd op to perform */ 945 struct mtget *mtget; /* mag tape struct to get info in */ 946 int callcount; /* number of times to call routine */ 947 int scount; /* number of files/records to space */ 948 int spaceop = 0; /* flag for skip/space operation */ 949 int error = 0; 950 951 #ifdef TSDEBUG 952 printf("tsioctl (%x, %lx, %p, %d)\n", dev, cmd, data, flag); 953 #endif 954 955 bp = &sc->ts_cbuf; 956 957 switch (cmd) { 958 case MTIOCTOP: /* do a mag tape op */ 959 mtop = (struct mtop *)data; 960 switch (mtop->mt_op) { 961 case MTWEOF: /* write an end-of-file record */ 962 callcount = mtop->mt_count; 963 scount = 1; 964 break; 965 case MTFSR: /* forward space record */ 966 case MTBSR: /* backward space record */ 967 spaceop = 1; 968 case MTFSF: /* forward space file */ 969 case MTBSF: /* backward space file */ 970 callcount = 1; 971 scount = mtop->mt_count; 972 break; 973 case MTREW: /* rewind */ 974 case MTOFFL: /* rewind and put the drive offline */ 975 case MTNOP: /* no operation, sets status only */ 976 callcount = 1; 977 scount = 1; /* wait for this rewind */ 978 break; 979 case MTRETEN: /* retension */ 980 case MTERASE: /* erase entire tape */ 981 case MTEOM: /* forward to end of media */ 982 case MTNBSF: /* backward space to begin of file */ 983 case MTCACHE: /* enable controller cache */ 984 case MTNOCACHE: /* disable controller cache */ 985 case MTSETBSIZ: /* set block size; 0 for variable */ 986 case MTSETDNSTY: /* set density code for current mode */ 987 printf("ioctl %d not implemented.\n", mtop->mt_op); 988 return (ENXIO); 989 default: 990 #ifdef TSDEBUG 991 printf("invalid ioctl %d\n", mtop->mt_op); 992 #endif 993 return (ENXIO); 994 } /* switch (mtop->mt_op) */ 995 996 if (callcount <= 0 || scount <= 0) { 997 #ifdef TSDEBUG 998 printf("invalid values %d/%d\n", callcount, scount); 999 #endif 1000 return (EINVAL); 1001 } 1002 do { 1003 tscommand(sc, dev, mtop->mt_op, scount); 1004 if (spaceop && bp->b_resid) { 1005 #ifdef TSDEBUG 1006 printf(("spaceop didn't complete\n")); 1007 #endif 1008 return (EIO); 1009 } 1010 if (bp->b_error != 0) { 1011 #ifdef TSDEBUG 1012 printf("error in ioctl %d\n", mtop->mt_op); 1013 #endif 1014 break; 1015 } 1016 } while (--callcount > 0); 1017 if (bp->b_error != 0) 1018 error = bp->b_error; 1019 return (error); 1020 1021 case MTIOCGET: /* get tape status */ 1022 mtget = (struct mtget *)data; 1023 mtget->mt_type = MT_ISTS; 1024 mtget->mt_dsreg = TS_RCSR(TSSR); 1025 mtget->mt_erreg = sc->sc_vts->status.xst0; 1026 mtget->mt_resid = 0; /* ??? */ 1027 mtget->mt_density = 0; /* ??? */ 1028 break; 1029 1030 case MTIOCIEOT: /* ignore EOT error */ 1031 #ifdef TSDEBUG 1032 printf(("MTIOCIEOT not implemented.\n")); 1033 #endif 1034 return (ENXIO); 1035 1036 case MTIOCEEOT: /* enable EOT error */ 1037 #ifdef TSDEBUG 1038 printf(("MTIOCEEOT not implemented.\n")); 1039 #endif 1040 return (ENXIO); 1041 1042 default: 1043 #ifdef TSDEBUG 1044 printf("invalid ioctl cmd 0x%lx\n", cmd); 1045 #endif 1046 return (ENXIO); 1047 } 1048 1049 return (0); 1050 } 1051 1052 1053 /* 1054 * 1055 */ 1056 int 1057 tsread(dev_t dev, struct uio *uio, int flag) 1058 { 1059 return (physio (tsstrategy, NULL, dev, B_READ, minphys, uio)); 1060 } 1061 1062 /* 1063 * 1064 */ 1065 int 1066 tswrite(dev_t dev, struct uio *uio, int flag) 1067 { 1068 return (physio (tsstrategy, NULL, dev, B_WRITE, minphys, uio)); 1069 } 1070 1071 /* 1072 * 1073 */ 1074 int 1075 tsdump(dev_t dev, daddr_t blkno, void *va, size_t size) 1076 { 1077 return EIO; 1078 }
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