mscp_tape.c revision 1.34
1 /* $NetBSD: mscp_tape.c,v 1.34 2008/06/11 17:32:30 drochner Exp $ */ 2 /* 3 * Copyright (c) 1996 Ludd, University of Lule}, Sweden. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed at Ludd, University of 17 * Lule}, Sweden and its contributors. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 34 /* 35 * MSCP tape device driver 36 */ 37 38 /* 39 * TODO 40 * Write status handling code. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: mscp_tape.c,v 1.34 2008/06/11 17:32:30 drochner Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/device.h> 48 #include <sys/kernel.h> 49 #include <sys/buf.h> 50 #include <sys/bufq.h> 51 #include <sys/ioccom.h> 52 #include <sys/mtio.h> 53 #include <sys/fcntl.h> 54 #include <sys/malloc.h> 55 #include <sys/systm.h> 56 #include <sys/proc.h> 57 #include <sys/conf.h> 58 59 #include <sys/bus.h> 60 #include <sys/cpu.h> 61 62 #include <dev/mscp/mscp.h> 63 #include <dev/mscp/mscpreg.h> 64 #include <dev/mscp/mscpvar.h> 65 66 #include "locators.h" 67 68 /* 69 * Drive status, per drive 70 */ 71 struct mt_softc { 72 struct device mt_dev; /* Autoconf struct */ 73 int mt_state; /* open/closed state */ 74 int mt_hwunit; /* Hardware unit number */ 75 int mt_inuse; /* Locks the tape drive for others */ 76 int mt_waswrite; /* Last operation was a write op */ 77 int mt_serex; /* Got serious exception */ 78 int mt_ioctlerr; /* Error after last ioctl */ 79 }; 80 81 #define MT_OFFLINE 0 82 #define MT_ONLINE 1 83 84 int mtmatch(struct device *, struct cfdata *, void *); 85 void mtattach(struct device *, struct device *, void *); 86 void mtdgram(struct device *, struct mscp *, struct mscp_softc *); 87 void mtiodone(struct device *, struct buf *); 88 int mtonline(struct device *, struct mscp *); 89 int mtgotstatus(struct device *, struct mscp *); 90 int mtioerror(struct device *, struct mscp *, struct buf *); 91 void mtfillin(struct buf *, struct mscp *); 92 int mtcmd(struct mt_softc *, int, int, int); 93 void mtcmddone(struct device *, struct mscp *); 94 int mt_putonline(struct mt_softc *); 95 96 struct mscp_device mt_device = { 97 mtdgram, 98 mtiodone, 99 mtonline, 100 mtgotstatus, 101 0, 102 mtioerror, 103 0, 104 mtfillin, 105 mtcmddone, 106 }; 107 108 /* This is not good, should allow more than 4 tapes/device type */ 109 #define mtunit(dev) (minor(dev) & T_UNIT) 110 #define mtnorewind(dev) (dev & T_NOREWIND) 111 #define mthdensity(dev) (dev & T_1600BPI) 112 113 CFATTACH_DECL(mt, sizeof(struct mt_softc), 114 mtmatch, mtattach, NULL, NULL); 115 116 extern struct cfdriver mt_cd; 117 118 dev_type_open(mtopen); 119 dev_type_close(mtclose); 120 dev_type_read(mtread); 121 dev_type_write(mtwrite); 122 dev_type_ioctl(mtioctl); 123 dev_type_strategy(mtstrategy); 124 dev_type_dump(mtdump); 125 126 const struct bdevsw mt_bdevsw = { 127 mtopen, mtclose, mtstrategy, mtioctl, mtdump, nosize, D_TAPE 128 }; 129 130 const struct cdevsw mt_cdevsw = { 131 mtopen, mtclose, mtread, mtwrite, mtioctl, 132 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 133 }; 134 135 /* 136 * More driver definitions, for generic MSCP code. 137 */ 138 139 int 140 mtmatch(parent, cf, aux) 141 struct device *parent; 142 struct cfdata *cf; 143 void *aux; 144 { 145 struct drive_attach_args *da = aux; 146 struct mscp *mp = da->da_mp; 147 148 if ((da->da_typ & MSCPBUS_TAPE) == 0) 149 return 0; 150 if (cf->cf_loc[MSCPBUSCF_DRIVE] != MSCPBUSCF_DRIVE_DEFAULT && 151 cf->cf_loc[MSCPBUSCF_DRIVE] != mp->mscp_unit) 152 return 0; 153 return 1; 154 } 155 156 /* 157 * The attach routine only checks and prints drive type. 158 */ 159 void 160 mtattach(parent, self, aux) 161 struct device *parent, *self; 162 void *aux; 163 { 164 struct mt_softc *mt = device_private(self); 165 struct drive_attach_args *da = aux; 166 struct mscp *mp = da->da_mp; 167 struct mscp_softc *mi = (void *)parent; 168 169 mt->mt_hwunit = mp->mscp_unit; 170 mi->mi_dp[mp->mscp_unit] = self; 171 172 disk_printtype(mp->mscp_unit, mp->mscp_guse.guse_mediaid); 173 } 174 175 /* 176 * (Try to) put the drive online. This is done the first time the 177 * drive is opened, or if it has fallen offline. 178 */ 179 int 180 mt_putonline(mt) 181 struct mt_softc *mt; 182 { 183 struct mscp *mp; 184 struct mscp_softc *mi = 185 (struct mscp_softc *)device_parent(&mt->mt_dev); 186 volatile int i; 187 188 ((volatile struct mt_softc *) mt)->mt_state = MT_OFFLINE; 189 mp = mscp_getcp(mi, MSCP_WAIT); 190 mp->mscp_opcode = M_OP_ONLINE; 191 mp->mscp_unit = mt->mt_hwunit; 192 mp->mscp_cmdref = (long)&mt->mt_state; 193 *mp->mscp_addr |= MSCP_OWN | MSCP_INT; 194 195 /* Poll away */ 196 i = bus_space_read_2(mi->mi_iot, mi->mi_iph, 0); 197 if (tsleep(&mt->mt_state, PRIBIO, "mtonline", 240 * hz)) 198 return MSCP_FAILED; 199 200 if ((volatile int)mt->mt_state != MT_ONLINE) 201 return MSCP_FAILED; 202 203 return MSCP_DONE; 204 } 205 /* 206 * Open a drive. 207 */ 208 /*ARGSUSED*/ 209 int 210 mtopen(dev, flag, fmt, l) 211 dev_t dev; 212 int flag, fmt; 213 struct lwp *l; 214 { 215 struct mt_softc *mt; 216 int unit; 217 218 /* 219 * Make sure this is a reasonable open request. 220 */ 221 unit = mtunit(dev); 222 mt = device_lookup_private(&mt_cd, unit); 223 if (!mt) 224 return ENXIO; 225 226 if (mt->mt_inuse) 227 return EBUSY; 228 mt->mt_inuse = 1; 229 230 if (mt_putonline(mt) == MSCP_FAILED) { 231 mt->mt_inuse = 0; 232 return EIO; 233 } 234 235 return 0; 236 } 237 238 /* ARGSUSED */ 239 int 240 mtclose(dev, flags, fmt, l) 241 dev_t dev; 242 int flags, fmt; 243 struct lwp *l; 244 { 245 int unit = mtunit(dev); 246 struct mt_softc *mt = device_lookup_private(&mt_cd, unit); 247 248 /* 249 * If we just have finished a writing, write EOT marks. 250 */ 251 if ((flags & FWRITE) && mt->mt_waswrite) { 252 mtcmd(mt, MTWEOF, 0, 0); 253 mtcmd(mt, MTWEOF, 0, 0); 254 mtcmd(mt, MTBSR, 1, 0); 255 } 256 if (mtnorewind(dev) == 0) 257 mtcmd(mt, MTREW, 0, 1); 258 if (mt->mt_serex) 259 mtcmd(mt, -1, 0, 0); 260 261 mt->mt_inuse = 0; /* Release the tape */ 262 return 0; 263 } 264 265 void 266 mtstrategy(bp) 267 struct buf *bp; 268 { 269 int unit; 270 struct mt_softc *mt; 271 272 /* 273 * Make sure this is a reasonable drive to use. 274 */ 275 unit = mtunit(bp->b_dev); 276 if ((mt = device_lookup_private(&mt_cd, unit)) == NULL) { 277 bp->b_error = ENXIO; 278 biodone(bp); 279 return; 280 } 281 282 mt->mt_waswrite = bp->b_flags & B_READ ? 0 : 1; 283 mscp_strategy(bp, device_parent(&mt->mt_dev)); 284 return; 285 } 286 287 int 288 mtread(dev, uio, flag) 289 dev_t dev; 290 struct uio *uio; 291 int flag; 292 { 293 294 return (physio(mtstrategy, NULL, dev, B_READ, minphys, uio)); 295 } 296 297 int 298 mtwrite(dev, uio, flag) 299 dev_t dev; 300 struct uio *uio; 301 int flag; 302 { 303 304 return (physio(mtstrategy, NULL, dev, B_WRITE, minphys, uio)); 305 } 306 307 void 308 mtiodone(usc, bp) 309 struct device *usc; 310 struct buf *bp; 311 { 312 313 biodone(bp); 314 } 315 316 /* 317 * Fill in drive addresses in a mscp packet waiting for transfer. 318 */ 319 void 320 mtfillin(bp, mp) 321 struct buf *bp; 322 struct mscp *mp; 323 { 324 int unit = mtunit(bp->b_dev); 325 struct mt_softc *mt = device_lookup_private(&mt_cd, unit); 326 327 mp->mscp_unit = mt->mt_hwunit; 328 if (mt->mt_serex == 2) { 329 mp->mscp_modifier = M_MD_CLSEX; 330 mt->mt_serex = 0; 331 } else 332 mp->mscp_modifier = 0; 333 334 mp->mscp_seq.seq_bytecount = bp->b_bcount; 335 } 336 337 /* 338 * Handle an error datagram. 339 */ 340 void 341 mtdgram(usc, mp, mi) 342 struct device *usc; 343 struct mscp *mp; 344 struct mscp_softc *mi; 345 { 346 if (mscp_decodeerror(usc == NULL?"unconf mt" : device_xname(usc), mp, mi)) 347 return; 348 } 349 350 /* 351 * A drive came on line, make sure it really _is_ on line before 352 * trying to use it. 353 */ 354 int 355 mtonline(usc, mp) 356 struct device *usc; 357 struct mscp *mp; 358 { 359 struct mt_softc *mt = (void *)usc; 360 361 wakeup((void *)&mt->mt_state); 362 if ((mp->mscp_status & M_ST_MASK) == M_ST_SUCCESS) 363 mt->mt_state = MT_ONLINE; 364 365 return (MSCP_DONE); 366 } 367 368 /* 369 * We got some (configured) unit's status. Return DONE. 370 */ 371 int 372 mtgotstatus(usc, mp) 373 struct device *usc; 374 struct mscp *mp; 375 { 376 return (MSCP_DONE); 377 } 378 379 static const char *mt_ioerrs[] = { 380 "invalid command", /* 1 M_ST_INVALCMD */ 381 "command aborted", /* 2 M_ST_ABORTED */ 382 "unit offline", /* 3 M_ST_OFFLINE */ 383 "unknown", /* 4 M_ST_AVAILABLE */ 384 "unknown", /* 5 M_ST_MFMTERR */ 385 "unit write protected", /* 6 M_ST_WRPROT */ 386 "compare error", /* 7 M_ST_COMPERR */ 387 "data error", /* 8 M_ST_DATAERR */ 388 "host buffer access error", /* 9 M_ST_HOSTBUFERR */ 389 "controller error", /* 10 M_ST_CTLRERR */ 390 "drive error", /* 11 M_ST_DRIVEERR */ 391 "formatter error", /* 12 M_ST_FORMATTERR */ 392 "BOT encountered", /* 13 M_ST_BOT */ 393 "tape mark encountered",/* 14 M_ST_TAPEMARK */ 394 "unknown", /* 15 */ 395 "record data truncated",/* 16 M_ST_RDTRUNC */ 396 }; 397 398 /* 399 * An I/O error, may be because of a tapemark encountered. 400 * Check that before failing. 401 */ 402 /*ARGSUSED*/ 403 int 404 mtioerror(usc, mp, bp) 405 struct device *usc; 406 struct mscp *mp; 407 struct buf *bp; 408 { 409 struct mt_softc *mt = (void *)usc; 410 int st = mp->mscp_status & M_ST_MASK; 411 412 if (mp->mscp_flags & M_EF_SEREX) 413 mt->mt_serex = 1; 414 if (st == M_ST_TAPEMARK) 415 mt->mt_serex = 2; 416 else { 417 if (st && st < 17) 418 printf("%s: error %d (%s)\n", device_xname(&mt->mt_dev), st, 419 mt_ioerrs[st-1]); 420 else 421 printf("%s: error %d\n", device_xname(&mt->mt_dev), st); 422 bp->b_error = EROFS; 423 } 424 425 return (MSCP_DONE); 426 } 427 428 /* 429 * I/O controls. 430 */ 431 int 432 mtioctl(dev, cmd, data, flag, l) 433 dev_t dev; 434 u_long cmd; 435 void *data; 436 int flag; 437 struct lwp *l; 438 { 439 int unit = mtunit(dev); 440 struct mt_softc *mt = device_lookup_private(&mt_cd, unit); 441 struct mtop *mtop; 442 int error = 0; 443 444 switch (cmd) { 445 446 case MTIOCTOP: 447 mtop = (void *)data; 448 if (mtop->mt_op == MTWEOF) { 449 while (mtop->mt_count-- > 0) 450 if ((error = mtcmd(mt, mtop->mt_op, 0, 0))) 451 break; 452 } else 453 error = mtcmd(mt, mtop->mt_op, mtop->mt_count, 0); 454 455 case MTIOCGET: 456 ((struct mtget *)data)->mt_type = MT_ISTMSCP; 457 /* XXX we need to fill in more fields here */ 458 break; 459 460 default: 461 error = ENXIO; 462 break; 463 } 464 return (error); 465 } 466 467 /* 468 * No crash dump support... 469 */ 470 int 471 mtdump(dev, blkno, va, size) 472 dev_t dev; 473 daddr_t blkno; 474 void *va; 475 size_t size; 476 { 477 return -1; 478 } 479 480 /* 481 * Send a command to the tape drive. Wait until the command is 482 * finished before returning. 483 * This routine must only be called when there are no data transfer 484 * active on this device. Can we be sure of this? Or does the ctlr 485 * queue up all command packets and take them in sequential order? 486 * It sure would be nice if my manual stated this... /ragge 487 */ 488 int 489 mtcmd(mt, cmd, count, complete) 490 struct mt_softc *mt; 491 int cmd, count, complete; 492 { 493 struct mscp *mp; 494 struct mscp_softc *mi = (void *)device_parent(&mt->mt_dev); 495 volatile int i; 496 497 mp = mscp_getcp(mi, MSCP_WAIT); 498 499 mt->mt_ioctlerr = 0; 500 mp->mscp_unit = mt->mt_hwunit; 501 mp->mscp_cmdref = -1; 502 *mp->mscp_addr |= MSCP_OWN | MSCP_INT; 503 504 switch (cmd) { 505 case MTWEOF: 506 mp->mscp_opcode = M_OP_WRITM; 507 break; 508 509 case MTBSF: 510 mp->mscp_modifier = M_MD_REVERSE; 511 case MTFSF: 512 mp->mscp_opcode = M_OP_POS; 513 mp->mscp_seq.seq_buffer = count; 514 break; 515 516 case MTBSR: 517 mp->mscp_modifier = M_MD_REVERSE; 518 case MTFSR: 519 mp->mscp_opcode = M_OP_POS; 520 mp->mscp_modifier |= M_MD_OBJCOUNT; 521 mp->mscp_seq.seq_bytecount = count; 522 break; 523 524 case MTREW: 525 mp->mscp_opcode = M_OP_POS; 526 mp->mscp_modifier = M_MD_REWIND | M_MD_CLSEX; 527 if (complete) 528 mp->mscp_modifier |= M_MD_IMMEDIATE; 529 mt->mt_serex = 0; 530 break; 531 532 case MTOFFL: 533 mp->mscp_opcode = M_OP_AVAILABLE; 534 mp->mscp_modifier = M_MD_UNLOAD | M_MD_CLSEX; 535 mt->mt_serex = 0; 536 break; 537 538 case MTNOP: 539 mp->mscp_opcode = M_OP_GETUNITST; 540 break; 541 542 case -1: /* Clear serious exception only */ 543 mp->mscp_opcode = M_OP_POS; 544 mp->mscp_modifier = M_MD_CLSEX; 545 mt->mt_serex = 0; 546 break; 547 548 default: 549 printf("Bad ioctl %x\n", cmd); 550 mp->mscp_opcode = M_OP_POS; 551 break; 552 } 553 554 i = bus_space_read_2(mi->mi_iot, mi->mi_iph, 0); 555 tsleep(&mt->mt_inuse, PRIBIO, "mtioctl", 0); 556 return mt->mt_ioctlerr; 557 } 558 559 /* 560 * Called from bus routines whenever a non-data transfer is finished. 561 */ 562 void 563 mtcmddone(usc, mp) 564 struct device *usc; 565 struct mscp *mp; 566 { 567 struct mt_softc *mt = (void *)usc; 568 569 if (mp->mscp_status) { 570 mt->mt_ioctlerr = EIO; 571 printf("%s: bad status %x\n", device_xname(&mt->mt_dev), 572 mp->mscp_status); 573 } 574 wakeup(&mt->mt_inuse); 575 } 576
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