rd.c revision 1.39
1 /* $NetBSD: rd.c,v 1.39 2015/01/02 19:42:06 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1988 University of Utah. 34 * Copyright (c) 1982, 1990, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * the Systems Programming Group of the University of Utah Computer 39 * Science Department. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * from: Utah $Hdr: rd.c 1.44 92/12/26$ 66 * 67 * @(#)rd.c 8.2 (Berkeley) 5/19/94 68 */ 69 70 /* 71 * CS80/SS80 disk driver 72 */ 73 74 #include <sys/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: rd.c,v 1.39 2015/01/02 19:42:06 christos Exp $"); 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/buf.h> 80 #include <sys/bufq.h> 81 #include <sys/callout.h> 82 #include <sys/conf.h> 83 #include <sys/device.h> 84 #include <sys/disk.h> 85 #include <sys/disklabel.h> 86 #include <sys/endian.h> 87 #include <sys/fcntl.h> 88 #include <sys/ioctl.h> 89 #include <sys/proc.h> 90 #include <sys/stat.h> 91 92 #include <sys/rnd.h> 93 94 #include <dev/gpib/gpibvar.h> 95 #include <dev/gpib/cs80busvar.h> 96 97 #include <dev/gpib/rdreg.h> 98 99 #ifdef DEBUG 100 int rddebug = 0xff; 101 #define RDB_FOLLOW 0x01 102 #define RDB_STATUS 0x02 103 #define RDB_IDENT 0x04 104 #define RDB_IO 0x08 105 #define RDB_ASYNC 0x10 106 #define RDB_ERROR 0x80 107 #define DPRINTF(mask, str) if (rddebug & (mask)) printf str 108 #else 109 #define DPRINTF(mask, str) /* nothing */ 110 #endif 111 112 struct rd_softc { 113 device_t sc_dev; 114 gpib_chipset_tag_t sc_ic; 115 gpib_handle_t sc_hdl; 116 117 struct disk sc_dk; 118 119 int sc_slave; /* GPIB slave */ 120 int sc_punit; /* physical unit on slave */ 121 122 int sc_flags; 123 #define RDF_ALIVE 0x01 124 #define RDF_SEEK 0x02 125 #define RDF_SWAIT 0x04 126 #define RDF_OPENING 0x08 127 #define RDF_CLOSING 0x10 128 #define RDF_WANTED 0x20 129 #define RDF_WLABEL 0x40 130 131 u_int16_t sc_type; 132 u_int8_t *sc_addr; 133 int sc_resid; 134 struct rd_iocmd sc_ioc; 135 struct bufq_state *sc_tab; 136 int sc_active; 137 int sc_errcnt; 138 139 struct callout sc_restart_ch; 140 141 krndsource_t rnd_source; 142 }; 143 144 #define RDUNIT(dev) DISKUNIT(dev) 145 #define RDPART(dev) DISKPART(dev) 146 #define RDMAKEDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part) 147 #define RDLABELDEV(dev) (RDMAKEDEV(major(dev), RDUNIT(dev), RAW_PART)) 148 149 #define RDRETRY 5 150 #define RDWAITC 1 /* min time for timeout in seconds */ 151 152 int rderrthresh = RDRETRY-1; /* when to start reporting errors */ 153 154 /* 155 * Misc. HW description, indexed by sc_type. 156 * Used for mapping 256-byte sectors for 512-byte sectors 157 */ 158 const struct rdidentinfo { 159 u_int16_t ri_hwid; /* 2 byte HW id */ 160 u_int16_t ri_maxunum; /* maximum allowed unit number */ 161 const char *ri_desc; /* drive type description */ 162 int ri_nbpt; /* DEV_BSIZE blocks per track */ 163 int ri_ntpc; /* tracks per cylinder */ 164 int ri_ncyl; /* cylinders per unit */ 165 int ri_nblocks; /* DEV_BSIZE blocks on disk */ 166 } rdidentinfo[] = { 167 { RD7946AID, 0, "7945A", NRD7945ABPT, 168 NRD7945ATRK, 968, 108416 }, 169 170 { RD9134DID, 1, "9134D", NRD9134DBPT, 171 NRD9134DTRK, 303, 29088 }, 172 173 { RD9134LID, 1, "9122S", NRD9122SBPT, 174 NRD9122STRK, 77, 1232 }, 175 176 { RD7912PID, 0, "7912P", NRD7912PBPT, 177 NRD7912PTRK, 572, 128128 }, 178 179 { RD7914PID, 0, "7914P", NRD7914PBPT, 180 NRD7914PTRK, 1152, 258048 }, 181 182 { RD7958AID, 0, "7958A", NRD7958ABPT, 183 NRD7958ATRK, 1013, 255276 }, 184 185 { RD7957AID, 0, "7957A", NRD7957ABPT, 186 NRD7957ATRK, 1036, 159544 }, 187 188 { RD7933HID, 0, "7933H", NRD7933HBPT, 189 NRD7933HTRK, 1321, 789958 }, 190 191 { RD9134LID, 1, "9134L", NRD9134LBPT, 192 NRD9134LTRK, 973, 77840 }, 193 194 { RD7936HID, 0, "7936H", NRD7936HBPT, 195 NRD7936HTRK, 698, 600978 }, 196 197 { RD7937HID, 0, "7937H", NRD7937HBPT, 198 NRD7937HTRK, 698, 1116102 }, 199 200 { RD7914CTID, 0, "7914CT", NRD7914PBPT, 201 NRD7914PTRK, 1152, 258048 }, 202 203 { RD7946AID, 0, "7946A", NRD7945ABPT, 204 NRD7945ATRK, 968, 108416 }, 205 206 { RD9134LID, 1, "9122D", NRD9122SBPT, 207 NRD9122STRK, 77, 1232 }, 208 209 { RD7957BID, 0, "7957B", NRD7957BBPT, 210 NRD7957BTRK, 1269, 159894 }, 211 212 { RD7958BID, 0, "7958B", NRD7958BBPT, 213 NRD7958BTRK, 786, 297108 }, 214 215 { RD7959BID, 0, "7959B", NRD7959BBPT, 216 NRD7959BTRK, 1572, 594216 }, 217 218 { RD2200AID, 0, "2200A", NRD2200ABPT, 219 NRD2200ATRK, 1449, 654948 }, 220 221 { RD2203AID, 0, "2203A", NRD2203ABPT, 222 NRD2203ATRK, 1449, 1309896 } 223 }; 224 int numrdidentinfo = sizeof(rdidentinfo) / sizeof(rdidentinfo[0]); 225 226 int rdlookup(int, int, int); 227 int rdgetinfo(struct rd_softc *); 228 void rdrestart(void *); 229 struct buf *rdfinish(struct rd_softc *, struct buf *); 230 231 void rdgetcompatlabel(struct rd_softc *, struct disklabel *); 232 void rdgetdefaultlabel(struct rd_softc *, struct disklabel *); 233 void rdrestart(void *); 234 void rdustart(struct rd_softc *); 235 struct buf *rdfinish(struct rd_softc *, struct buf *); 236 void rdcallback(void *, int); 237 void rdstart(struct rd_softc *); 238 void rdintr(struct rd_softc *); 239 int rderror(struct rd_softc *); 240 241 int rdmatch(device_t, cfdata_t, void *); 242 void rdattach(device_t, device_t, void *); 243 244 CFATTACH_DECL_NEW(rd, sizeof(struct rd_softc), 245 rdmatch, rdattach, NULL, NULL); 246 247 248 dev_type_open(rdopen); 249 dev_type_close(rdclose); 250 dev_type_read(rdread); 251 dev_type_write(rdwrite); 252 dev_type_ioctl(rdioctl); 253 dev_type_strategy(rdstrategy); 254 dev_type_dump(rddump); 255 dev_type_size(rdsize); 256 257 const struct bdevsw rd_bdevsw = { 258 .d_open = rdopen, 259 .d_close = rdclose, 260 .d_strategy = rdstrategy, 261 .d_ioctl = rdioctl, 262 .d_dump = rddump, 263 .d_psize = rdsize, 264 .d_discard = nodiscard, 265 .d_flag = D_DISK 266 }; 267 268 const struct cdevsw rd_cdevsw = { 269 .d_open = rdopen, 270 .d_close = rdclose, 271 .d_read = rdread, 272 .d_write = rdwrite, 273 .d_ioctl = rdioctl, 274 .d_stop = nostop, 275 .d_tty = notty, 276 .d_poll = nopoll, 277 .d_mmap = nommap, 278 .d_kqfilter = nokqfilter, 279 .d_discard = nodiscard, 280 .d_flag = D_DISK 281 }; 282 283 extern struct cfdriver rd_cd; 284 285 int 286 rdlookup(int id, int slave, int punit) 287 { 288 int i; 289 290 for (i = 0; i < numrdidentinfo; i++) { 291 if (rdidentinfo[i].ri_hwid == id) 292 break; 293 } 294 if (i == numrdidentinfo || punit > rdidentinfo[i].ri_maxunum) 295 return (-1); 296 return (i); 297 } 298 299 int 300 rdmatch(device_t parent, cfdata_t match, void *aux) 301 { 302 struct cs80bus_attach_args *ca = aux; 303 304 if (rdlookup(ca->ca_id, ca->ca_slave, ca->ca_punit) < 0) 305 return (0); 306 return (1); 307 } 308 309 void 310 rdattach(device_t parent, device_t self, void *aux) 311 { 312 struct rd_softc *sc = device_private(self); 313 struct cs80bus_attach_args *ca = aux; 314 struct cs80_description csd; 315 char name[7]; 316 int type, i, n; 317 318 sc->sc_dev = self; 319 sc->sc_ic = ca->ca_ic; 320 sc->sc_slave = ca->ca_slave; 321 sc->sc_punit = ca->ca_punit; 322 323 if ((type = rdlookup(ca->ca_id, ca->ca_slave, ca->ca_punit)) < 0) 324 return; 325 326 if (cs80reset(parent, sc->sc_slave, sc->sc_punit)) { 327 aprint_normal("\n"); 328 aprint_error_dev(sc->sc_dev, "can't reset device\n"); 329 return; 330 } 331 332 if (cs80describe(parent, sc->sc_slave, sc->sc_punit, &csd)) { 333 aprint_normal("\n"); 334 aprint_error_dev(sc->sc_dev, "didn't respond to describe command\n"); 335 return; 336 } 337 memset(name, 0, sizeof(name)); 338 for (i=0, n=0; i<3; i++) { 339 name[n++] = (csd.d_name[i] >> 4) + '0'; 340 name[n++] = (csd.d_name[i] & 0x0f) + '0'; 341 } 342 343 #ifdef DEBUG 344 if (rddebug & RDB_IDENT) { 345 printf("\n%s: name: ('%s')\n", 346 device_xname(sc->sc_dev), name); 347 printf(" iuw %x, maxxfr %d, ctype %d\n", 348 csd.d_iuw, csd.d_cmaxxfr, csd.d_ctype); 349 printf(" utype %d, bps %d, blkbuf %d, burst %d, blktime %d\n", 350 csd.d_utype, csd.d_sectsize, 351 csd.d_blkbuf, csd.d_burstsize, csd.d_blocktime); 352 printf(" avxfr %d, ort %d, atp %d, maxint %d, fv %x, rv %x\n", 353 csd.d_uavexfr, csd.d_retry, csd.d_access, 354 csd.d_maxint, csd.d_fvbyte, csd.d_rvbyte); 355 printf(" maxcyl/head/sect %d/%d/%d, maxvsect %d, inter %d\n", 356 csd.d_maxcylhead >> 8, csd.d_maxcylhead & 0xff, 357 csd.d_maxsect, csd.d_maxvsectl, csd.d_interleave); 358 printf("%s", device_xname(sc->sc_dev)); 359 } 360 #endif 361 362 /* 363 * Take care of a couple of anomolies: 364 * 1. 7945A and 7946A both return same HW id 365 * 2. 9122S and 9134D both return same HW id 366 * 3. 9122D and 9134L both return same HW id 367 */ 368 switch (ca->ca_id) { 369 case RD7946AID: 370 if (memcmp(name, "079450", 6) == 0) 371 type = RD7945A; 372 else 373 type = RD7946A; 374 break; 375 376 case RD9134LID: 377 if (memcmp(name, "091340", 6) == 0) 378 type = RD9134L; 379 else 380 type = RD9122D; 381 break; 382 383 case RD9134DID: 384 if (memcmp(name, "091220", 6) == 0) 385 type = RD9122S; 386 else 387 type = RD9134D; 388 break; 389 } 390 391 sc->sc_type = type; 392 393 /* 394 * XXX We use DEV_BSIZE instead of the sector size value pulled 395 * XXX off the driver because all of this code assumes 512 byte 396 * XXX blocks. ICK! 397 */ 398 printf(": %s\n", rdidentinfo[type].ri_desc); 399 printf("%s: %d cylinders, %d heads, %d blocks, %d bytes/block\n", 400 device_xname(sc->sc_dev), rdidentinfo[type].ri_ncyl, 401 rdidentinfo[type].ri_ntpc, rdidentinfo[type].ri_nblocks, 402 DEV_BSIZE); 403 404 bufq_alloc(&sc->sc_tab, "fcfs", 0); 405 406 /* 407 * Initialize and attach the disk structure. 408 */ 409 memset(&sc->sc_dk, 0, sizeof(sc->sc_dk)); 410 disk_init(&sc->sc_dk, device_xname(sc->sc_dev), NULL); 411 disk_attach(&sc->sc_dk); 412 413 callout_init(&sc->sc_restart_ch, 0); 414 415 if (gpibregister(sc->sc_ic, sc->sc_slave, rdcallback, sc, 416 &sc->sc_hdl)) { 417 aprint_error_dev(sc->sc_dev, "can't register callback\n"); 418 return; 419 } 420 421 sc->sc_flags = RDF_ALIVE; 422 #ifdef DEBUG 423 /* always report errors */ 424 if (rddebug & RDB_ERROR) 425 rderrthresh = 0; 426 #endif 427 /* 428 * attach the device into the random source list 429 */ 430 rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), 431 RND_TYPE_DISK, RND_FLAG_DEFAULT); 432 } 433 434 /* 435 * Read or construct a disklabel 436 */ 437 int 438 rdgetinfo(struct rd_softc *sc) 439 { 440 struct disklabel *lp = sc->sc_dk.dk_label; 441 struct partition *pi; 442 const char *msg; 443 444 memset(sc->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel)); 445 446 rdgetdefaultlabel(sc, lp); 447 448 /* 449 * Call the generic disklabel extraction routine 450 */ 451 msg = readdisklabel(RDMAKEDEV(0, device_unit(sc->sc_dev), RAW_PART), 452 rdstrategy, lp, NULL); 453 if (msg == NULL) 454 return (0); 455 456 pi = lp->d_partitions; 457 printf("%s: WARNING: %s\n", device_xname(sc->sc_dev), msg); 458 459 pi[RAW_PART].p_size = rdidentinfo[sc->sc_type].ri_nblocks; 460 lp->d_npartitions = RAW_PART+1; 461 pi[0].p_size = 0; 462 463 return (0); 464 } 465 466 int 467 rdopen(dev_t dev, int flags, int mode, struct lwp *l) 468 { 469 struct rd_softc *sc; 470 int error, mask, part; 471 472 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 473 if (sc == NULL || (sc->sc_flags & RDF_ALIVE) ==0) 474 return (ENXIO); 475 476 /* 477 * Wait for any pending opens/closes to complete 478 */ 479 while (sc->sc_flags & (RDF_OPENING | RDF_CLOSING)) 480 (void) tsleep(sc, PRIBIO, "rdopen", 0); 481 482 /* 483 * On first open, get label and partition info. 484 * We may block reading the label, so be careful 485 * to stop any other opens. 486 */ 487 if (sc->sc_dk.dk_openmask == 0) { 488 sc->sc_flags |= RDF_OPENING; 489 error = rdgetinfo(sc); 490 sc->sc_flags &= ~RDF_OPENING; 491 wakeup((void *)sc); 492 if (error) 493 return (error); 494 } 495 496 part = RDPART(dev); 497 mask = 1 << part; 498 499 /* Check that the partition exists. */ 500 if (part != RAW_PART && (part > sc->sc_dk.dk_label->d_npartitions || 501 sc->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) 502 return (ENXIO); 503 504 /* Ensure only one open at a time. */ 505 switch (mode) { 506 case S_IFCHR: 507 sc->sc_dk.dk_copenmask |= mask; 508 break; 509 case S_IFBLK: 510 sc->sc_dk.dk_bopenmask |= mask; 511 break; 512 } 513 sc->sc_dk.dk_openmask = 514 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 515 516 return (0); 517 } 518 519 int 520 rdclose(dev_t dev, int flag, int mode, struct lwp *l) 521 { 522 struct rd_softc *sc; 523 struct disk *dk; 524 int mask, s; 525 526 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 527 if (sc == NULL) 528 return (ENXIO); 529 530 dk = &sc->sc_dk; 531 532 mask = 1 << RDPART(dev); 533 if (mode == S_IFCHR) 534 dk->dk_copenmask &= ~mask; 535 else 536 dk->dk_bopenmask &= ~mask; 537 dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask; 538 /* 539 * On last close, we wait for all activity to cease since 540 * the label/parition info will become invalid. Since we 541 * might sleep, we must block any opens while we are here. 542 * Note we don't have to about other closes since we know 543 * we are the last one. 544 */ 545 if (dk->dk_openmask == 0) { 546 sc->sc_flags |= RDF_CLOSING; 547 s = splbio(); 548 while (sc->sc_active) { 549 sc->sc_flags |= RDF_WANTED; 550 (void) tsleep(&sc->sc_tab, PRIBIO, "rdclose", 0); 551 } 552 splx(s); 553 sc->sc_flags &= ~(RDF_CLOSING | RDF_WLABEL); 554 wakeup((void *)sc); 555 } 556 return (0); 557 } 558 559 void 560 rdstrategy(struct buf *bp) 561 { 562 struct rd_softc *sc; 563 struct partition *pinfo; 564 daddr_t bn; 565 int sz, s; 566 int offset; 567 568 sc = device_lookup_private(&rd_cd, RDUNIT(bp->b_dev)); 569 570 DPRINTF(RDB_FOLLOW, 571 ("rdstrategy(%p): dev %" PRIx64 ", bn %" PRId64 ", bcount %d, %c\n", 572 bp, bp->b_dev, bp->b_blkno, bp->b_bcount, 573 (bp->b_flags & B_READ) ? 'R' : 'W')); 574 575 bn = bp->b_blkno; 576 sz = howmany(bp->b_bcount, DEV_BSIZE); 577 pinfo = &sc->sc_dk.dk_label->d_partitions[RDPART(bp->b_dev)]; 578 579 /* Don't perform partition translation on RAW_PART. */ 580 offset = (RDPART(bp->b_dev) == RAW_PART) ? 0 : pinfo->p_offset; 581 582 if (RDPART(bp->b_dev) != RAW_PART) { 583 /* 584 * XXX This block of code belongs in 585 * XXX bounds_check_with_label() 586 */ 587 588 if (bn < 0 || bn + sz > pinfo->p_size) { 589 sz = pinfo->p_size - bn; 590 if (sz == 0) { 591 bp->b_resid = bp->b_bcount; 592 goto done; 593 } 594 if (sz < 0) { 595 bp->b_error = EINVAL; 596 goto done; 597 } 598 bp->b_bcount = dbtob(sz); 599 } 600 /* 601 * Check for write to write protected label 602 */ 603 if (bn + offset <= LABELSECTOR && 604 #if LABELSECTOR != 0 605 bn + offset + sz > LABELSECTOR && 606 #endif 607 !(bp->b_flags & B_READ) && !(sc->sc_flags & RDF_WLABEL)) { 608 bp->b_error = EROFS; 609 goto done; 610 } 611 } 612 bp->b_rawblkno = bn + offset; 613 s = splbio(); 614 bufq_put(sc->sc_tab, bp); 615 if (sc->sc_active == 0) { 616 sc->sc_active = 1; 617 rdustart(sc); 618 } 619 splx(s); 620 return; 621 done: 622 biodone(bp); 623 } 624 625 /* 626 * Called from timeout() when handling maintenance releases 627 * callout from timeouts 628 */ 629 void 630 rdrestart(void *arg) 631 { 632 int s = splbio(); 633 rdustart((struct rd_softc *)arg); 634 splx(s); 635 } 636 637 638 /* called by rdstrategy() to start a block transfer */ 639 /* called by rdrestart() when handingly timeouts */ 640 /* called by rdintr() */ 641 void 642 rdustart(struct rd_softc *sc) 643 { 644 struct buf *bp; 645 646 bp = bufq_peek(sc->sc_tab); 647 sc->sc_addr = bp->b_data; 648 sc->sc_resid = bp->b_bcount; 649 if (gpibrequest(sc->sc_ic, sc->sc_hdl)) 650 rdstart(sc); 651 } 652 653 struct buf * 654 rdfinish(struct rd_softc *sc, struct buf *bp) 655 { 656 657 sc->sc_errcnt = 0; 658 (void)bufq_get(sc->sc_tab); 659 bp->b_resid = 0; 660 biodone(bp); 661 gpibrelease(sc->sc_ic, sc->sc_hdl); 662 if ((bp = bufq_peek(sc->sc_tab)) != NULL) 663 return (bp); 664 sc->sc_active = 0; 665 if (sc->sc_flags & RDF_WANTED) { 666 sc->sc_flags &= ~RDF_WANTED; 667 wakeup((void *)&sc->sc_tab); 668 } 669 return (NULL); 670 } 671 672 void 673 rdcallback(void *v, int action) 674 { 675 struct rd_softc *sc = v; 676 677 DPRINTF(RDB_FOLLOW, ("rdcallback: v=%p, action=%d\n", v, action)); 678 679 switch (action) { 680 case GPIBCBF_START: 681 rdstart(sc); 682 break; 683 case GPIBCBF_INTR: 684 rdintr(sc); 685 break; 686 #ifdef DEBUG 687 default: 688 DPRINTF(RDB_ERROR, ("rdcallback: unknown action %d\n", 689 action)); 690 break; 691 #endif 692 } 693 } 694 695 696 /* called from rdustart() to start a transfer */ 697 /* called from gpib interface as the initiator */ 698 void 699 rdstart(struct rd_softc *sc) 700 { 701 struct buf *bp = bufq_peek(sc->sc_tab); 702 int slave, punit; 703 704 slave = sc->sc_slave; 705 punit = sc->sc_punit; 706 707 DPRINTF(RDB_FOLLOW, ("rdstart(%s): bp %p, %c\n", 708 device_xname(sc->sc_dev), bp, (bp->b_flags & B_READ) ? 'R' : 'W')); 709 710 again: 711 712 sc->sc_flags |= RDF_SEEK; 713 sc->sc_ioc.c_unit = CS80CMD_SUNIT(punit); 714 sc->sc_ioc.c_volume = CS80CMD_SVOL(0); 715 sc->sc_ioc.c_saddr = CS80CMD_SADDR; 716 sc->sc_ioc.c_hiaddr = htobe16(0); 717 sc->sc_ioc.c_addr = htobe32(RDBTOS(bp->b_rawblkno)); 718 sc->sc_ioc.c_nop2 = CS80CMD_NOP; 719 sc->sc_ioc.c_slen = CS80CMD_SLEN; 720 sc->sc_ioc.c_len = htobe32(sc->sc_resid); 721 sc->sc_ioc.c_cmd = bp->b_flags & B_READ ? CS80CMD_READ : CS80CMD_WRITE; 722 723 if (gpibsend(sc->sc_ic, slave, CS80CMD_SCMD, &sc->sc_ioc.c_unit, 724 sizeof(sc->sc_ioc)-1) == sizeof(sc->sc_ioc)-1) { 725 /* Instrumentation. */ 726 disk_busy(&sc->sc_dk); 727 iostat_seek(sc->sc_dk.dk_stats); 728 gpibawait(sc->sc_ic); 729 return; 730 } 731 /* 732 * Experience has shown that the gpibwait in this gpibsend will 733 * occasionally timeout. It appears to occur mostly on old 7914 734 * drives with full maintenance tracks. We should probably 735 * integrate this with the backoff code in rderror. 736 */ 737 738 DPRINTF(RDB_ERROR, 739 ("rdstart: cmd %x adr %ul blk %" PRId64 " len %d ecnt %d\n", 740 sc->sc_ioc.c_cmd, sc->sc_ioc.c_addr, bp->b_blkno, sc->sc_resid, 741 sc->sc_errcnt)); 742 743 sc->sc_flags &= ~RDF_SEEK; 744 cs80reset(device_parent(sc->sc_dev), slave, punit); 745 if (sc->sc_errcnt++ < RDRETRY) 746 goto again; 747 printf("%s: rdstart err: cmd 0x%x sect %uld blk %" PRId64 " len %d\n", 748 device_xname(sc->sc_dev), sc->sc_ioc.c_cmd, sc->sc_ioc.c_addr, 749 bp->b_blkno, sc->sc_resid); 750 bp->b_error = EIO; 751 bp = rdfinish(sc, bp); 752 if (bp) { 753 sc->sc_addr = bp->b_data; 754 sc->sc_resid = bp->b_bcount; 755 if (gpibrequest(sc->sc_ic, sc->sc_hdl)) 756 goto again; 757 } 758 } 759 760 void 761 rdintr(struct rd_softc *sc) 762 { 763 struct buf *bp; 764 u_int8_t stat = 13; /* in case gpibrecv fails */ 765 int rv, dir, restart, slave; 766 767 slave = sc->sc_slave; 768 bp = bufq_peek(sc->sc_tab); 769 770 DPRINTF(RDB_FOLLOW, ("rdintr(%s): bp %p, %c, flags %x\n", 771 device_xname(sc->sc_dev), bp, (bp->b_flags & B_READ) ? 'R' : 'W', 772 sc->sc_flags)); 773 774 disk_unbusy(&sc->sc_dk, (bp->b_bcount - bp->b_resid), 775 (bp->b_flags & B_READ)); 776 777 if (sc->sc_flags & RDF_SEEK) { 778 sc->sc_flags &= ~RDF_SEEK; 779 dir = (bp->b_flags & B_READ ? GPIB_READ : GPIB_WRITE); 780 gpibxfer(sc->sc_ic, slave, CS80CMD_EXEC, sc->sc_addr, 781 sc->sc_resid, dir, dir == GPIB_READ); 782 disk_busy(&sc->sc_dk); 783 return; 784 } 785 if ((sc->sc_flags & RDF_SWAIT) == 0) { 786 if (gpibpptest(sc->sc_ic, slave) == 0) { 787 /* Instrumentation. */ 788 disk_busy(&sc->sc_dk); 789 sc->sc_flags |= RDF_SWAIT; 790 gpibawait(sc->sc_ic); 791 return; 792 } 793 } else 794 sc->sc_flags &= ~RDF_SWAIT; 795 rv = gpibrecv(sc->sc_ic, slave, CS80CMD_QSTAT, &stat, 1); 796 if (rv != 1 || stat) { 797 DPRINTF(RDB_ERROR, 798 ("rdintr: receive failed (rv=%d) or bad stat %d\n", rv, 799 stat)); 800 restart = rderror(sc); 801 if (sc->sc_errcnt++ < RDRETRY) { 802 if (restart) 803 rdstart(sc); 804 return; 805 } 806 bp->b_error = EIO; 807 } 808 if (rdfinish(sc, bp) != NULL) 809 rdustart(sc); 810 rnd_add_uint32(&sc->rnd_source, bp->b_blkno); 811 } 812 813 /* 814 * Deal with errors. 815 * Returns 1 if request should be restarted, 816 * 0 if we should just quietly give up. 817 */ 818 int 819 rderror(struct rd_softc *sc) 820 { 821 struct cs80_stat css; 822 struct buf *bp; 823 daddr_t hwbn, pbn; 824 825 DPRINTF(RDB_FOLLOW, ("rderror: sc=%p\n", sc)); 826 827 if (cs80status(device_parent(sc->sc_dev), sc->sc_slave, 828 sc->sc_punit, &css)) { 829 cs80reset(device_parent(sc->sc_dev), sc->sc_slave, 830 sc->sc_punit); 831 return (1); 832 } 833 #ifdef DEBUG 834 if (rddebug & RDB_ERROR) { /* status info */ 835 printf("\n volume: %d, unit: %d\n", 836 (css.c_vu>>4)&0xF, css.c_vu&0xF); 837 printf(" reject 0x%x\n", css.c_ref); 838 printf(" fault 0x%x\n", css.c_fef); 839 printf(" access 0x%x\n", css.c_aef); 840 printf(" info 0x%x\n", css.c_ief); 841 printf(" block, P1-P10: "); 842 printf("0x%x", *(u_int32_t *)&css.c_raw[0]); 843 printf("0x%x", *(u_int32_t *)&css.c_raw[4]); 844 printf("0x%x\n", *(u_int16_t *)&css.c_raw[8]); 845 } 846 #endif 847 if (css.c_fef & FEF_REXMT) 848 return (1); 849 if (css.c_fef & FEF_PF) { 850 cs80reset(device_parent(sc->sc_dev), sc->sc_slave, 851 sc->sc_punit); 852 return (1); 853 } 854 /* 855 * Unit requests release for internal maintenance. 856 * We just delay awhile and try again later. Use expontially 857 * increasing backoff ala ethernet drivers since we don't really 858 * know how long the maintenance will take. With RDWAITC and 859 * RDRETRY as defined, the range is 1 to 32 seconds. 860 */ 861 if (css.c_fef & FEF_IMR) { 862 extern int hz; 863 int rdtimo = RDWAITC << sc->sc_errcnt; 864 DPRINTF(RDB_STATUS, 865 ("%s: internal maintenance, %d-second timeout\n", 866 device_xname(sc->sc_dev), rdtimo)); 867 gpibrelease(sc->sc_ic, sc->sc_hdl); 868 callout_reset(&sc->sc_restart_ch, rdtimo * hz, rdrestart, sc); 869 return (0); 870 } 871 /* 872 * Only report error if we have reached the error reporting 873 * threshhold. By default, this will only report after the 874 * retry limit has been exceeded. 875 */ 876 if (sc->sc_errcnt < rderrthresh) 877 return (1); 878 879 /* 880 * First conjure up the block number at which the error occurred. 881 */ 882 bp = bufq_peek(sc->sc_tab); 883 pbn = sc->sc_dk.dk_label->d_partitions[RDPART(bp->b_dev)].p_offset; 884 if ((css.c_fef & FEF_CU) || (css.c_fef & FEF_DR) || 885 (css.c_ief & IEF_RRMASK)) { 886 /* 887 * Not all errors report a block number, just use b_blkno. 888 */ 889 hwbn = RDBTOS(pbn + bp->b_blkno); 890 pbn = bp->b_blkno; 891 } else { 892 hwbn = css.c_blk; 893 pbn = RDSTOB(hwbn) - pbn; 894 } 895 #ifdef DEBUG 896 if (rddebug & RDB_ERROR) { /* status info */ 897 printf("\n volume: %d, unit: %d\n", 898 (css.c_vu>>4)&0xF, css.c_vu&0xF); 899 printf(" reject 0x%x\n", css.c_ref); 900 printf(" fault 0x%x\n", css.c_fef); 901 printf(" access 0x%x\n", css.c_aef); 902 printf(" info 0x%x\n", css.c_ief); 903 printf(" block, P1-P10: "); 904 printf(" block: %" PRId64 ", P1-P10: ", hwbn); 905 printf("0x%x", *(u_int32_t *)&css.c_raw[0]); 906 printf("0x%x", *(u_int32_t *)&css.c_raw[4]); 907 printf("0x%x\n", *(u_int16_t *)&css.c_raw[8]); 908 } 909 #endif 910 #ifdef DEBUG 911 if (rddebug & RDB_ERROR) { /* command */ 912 printf(" ioc: "); 913 printf("0x%x", *(u_int32_t *)&sc->sc_ioc.c_pad); 914 printf("0x%x", *(u_int16_t *)&sc->sc_ioc.c_hiaddr); 915 printf("0x%x", *(u_int32_t *)&sc->sc_ioc.c_addr); 916 printf("0x%x", *(u_int16_t *)&sc->sc_ioc.c_nop2); 917 printf("0x%x", *(u_int32_t *)&sc->sc_ioc.c_len); 918 printf("0x%x\n", *(u_int16_t *)&sc->sc_ioc.c_cmd); 919 return (1); 920 } 921 #endif 922 /* 923 * Now output a generic message suitable for badsect. 924 * Note that we don't use harderr because it just prints 925 * out b_blkno which is just the beginning block number 926 * of the transfer, not necessary where the error occurred. 927 */ 928 printf("%s%c: hard error, sector number %" PRId64 "\n", 929 device_xname(sc->sc_dev), 'a'+RDPART(bp->b_dev), pbn); 930 /* 931 * Now report the status as returned by the hardware with 932 * attempt at interpretation. 933 */ 934 printf("%s %s error:", device_xname(sc->sc_dev), 935 (bp->b_flags & B_READ) ? "read" : "write"); 936 printf(" unit %d, volume %d R0x%x F0x%x A0x%x I0x%x\n", 937 css.c_vu&0xF, (css.c_vu>>4)&0xF, 938 css.c_ref, css.c_fef, css.c_aef, css.c_ief); 939 printf("P1-P10: "); 940 printf("0x%x ", *(u_int32_t *)&css.c_raw[0]); 941 printf("0x%x ", *(u_int32_t *)&css.c_raw[4]); 942 printf("0x%x\n", *(u_int16_t *)&css.c_raw[8]); 943 944 return (1); 945 } 946 947 int 948 rdread(dev_t dev, struct uio *uio, int flags) 949 { 950 951 return (physio(rdstrategy, NULL, dev, B_READ, minphys, uio)); 952 } 953 954 int 955 rdwrite(dev_t dev, struct uio *uio, int flags) 956 { 957 958 return (physio(rdstrategy, NULL, dev, B_WRITE, minphys, uio)); 959 } 960 961 int 962 rdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 963 { 964 struct rd_softc *sc; 965 struct disklabel *lp; 966 int error, flags; 967 968 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 969 if (sc == NULL) 970 return (ENXIO); 971 lp = sc->sc_dk.dk_label; 972 973 DPRINTF(RDB_FOLLOW, ("rdioctl: sc=%p\n", sc)); 974 975 error = disk_ioctl(&sc->sc_dk, dev, cmd, data, flag, l); 976 if (error != EPASSTHROUGH) 977 return error; 978 979 switch (cmd) { 980 case DIOCWLABEL: 981 if ((flag & FWRITE) == 0) 982 return (EBADF); 983 if (*(int *)data) 984 sc->sc_flags |= RDF_WLABEL; 985 else 986 sc->sc_flags &= ~RDF_WLABEL; 987 return (0); 988 989 case DIOCSDINFO: 990 if ((flag & FWRITE) == 0) 991 return (EBADF); 992 return (setdisklabel(lp, (struct disklabel *)data, 993 (sc->sc_flags & RDF_WLABEL) ? 0 : sc->sc_dk.dk_openmask, 994 (struct cpu_disklabel *)0)); 995 996 case DIOCWDINFO: 997 if ((flag & FWRITE) == 0) 998 return (EBADF); 999 error = setdisklabel(lp, (struct disklabel *)data, 1000 (sc->sc_flags & RDF_WLABEL) ? 0 : sc->sc_dk.dk_openmask, 1001 (struct cpu_disklabel *)0); 1002 if (error) 1003 return (error); 1004 flags = sc->sc_flags; 1005 sc->sc_flags = RDF_ALIVE | RDF_WLABEL; 1006 error = writedisklabel(RDLABELDEV(dev), rdstrategy, lp, 1007 (struct cpu_disklabel *)0); 1008 sc->sc_flags = flags; 1009 return (error); 1010 1011 case DIOCGDEFLABEL: 1012 rdgetdefaultlabel(sc, (struct disklabel *)data); 1013 return (0); 1014 } 1015 return (EINVAL); 1016 } 1017 1018 void 1019 rdgetdefaultlabel(struct rd_softc *sc, struct disklabel *lp) 1020 { 1021 int type = sc->sc_type; 1022 1023 memset((void *)lp, 0, sizeof(struct disklabel)); 1024 1025 lp->d_type = DKTYPE_HPIB /* DKTYPE_GPIB */; 1026 lp->d_secsize = DEV_BSIZE; 1027 lp->d_nsectors = rdidentinfo[type].ri_nbpt; 1028 lp->d_ntracks = rdidentinfo[type].ri_ntpc; 1029 lp->d_ncylinders = rdidentinfo[type].ri_ncyl; 1030 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 1031 lp->d_secperunit = lp->d_ncylinders * lp->d_secpercyl; 1032 1033 strncpy(lp->d_typename, rdidentinfo[type].ri_desc, 16); 1034 strncpy(lp->d_packname, "fictitious", 16); 1035 lp->d_rpm = 3000; 1036 lp->d_interleave = 1; 1037 lp->d_flags = 0; 1038 1039 lp->d_partitions[RAW_PART].p_offset = 0; 1040 lp->d_partitions[RAW_PART].p_size = 1041 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1042 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1043 lp->d_npartitions = RAW_PART + 1; 1044 1045 lp->d_magic = DISKMAGIC; 1046 lp->d_magic2 = DISKMAGIC; 1047 lp->d_checksum = dkcksum(lp); 1048 } 1049 1050 int 1051 rdsize(dev_t dev) 1052 { 1053 struct rd_softc *sc; 1054 int psize, didopen = 0; 1055 1056 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 1057 if (sc == NULL || (sc->sc_flags & RDF_ALIVE) == 0) 1058 return (-1); 1059 1060 /* 1061 * We get called very early on (via swapconf) 1062 * without the device being open so we may need 1063 * to handle it here. 1064 */ 1065 if (sc->sc_dk.dk_openmask == 0) { 1066 if (rdopen(dev, FREAD | FWRITE, S_IFBLK, NULL)) 1067 return (-1); 1068 didopen = 1; 1069 } 1070 psize = sc->sc_dk.dk_label->d_partitions[RDPART(dev)].p_size * 1071 (sc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1072 if (didopen) 1073 (void) rdclose(dev, FREAD | FWRITE, S_IFBLK, NULL); 1074 return (psize); 1075 } 1076 1077 1078 static int rddoingadump; /* simple mutex */ 1079 1080 /* 1081 * Non-interrupt driven, non-dma dump routine. 1082 */ 1083 int 1084 rddump(dev_t dev, daddr_t blkno, void *va, size_t size) 1085 { 1086 struct rd_softc *sc; 1087 int sectorsize; /* size of a disk sector */ 1088 int nsects; /* number of sectors in partition */ 1089 int sectoff; /* sector offset of partition */ 1090 int totwrt; /* total number of sectors left to write */ 1091 int nwrt; /* current number of sectors to write */ 1092 int slave; 1093 struct disklabel *lp; 1094 u_int8_t stat; 1095 1096 /* Check for recursive dump; if so, punt. */ 1097 if (rddoingadump) 1098 return (EFAULT); 1099 rddoingadump = 1; 1100 1101 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 1102 if (sc == NULL || (sc->sc_flags & RDF_ALIVE) == 0) 1103 return (ENXIO); 1104 1105 DPRINTF(RDB_FOLLOW, ("rddump: sc=%p\n", sc)); 1106 1107 slave = sc->sc_slave; 1108 1109 /* 1110 * Convert to disk sectors. Request must be a multiple of size. 1111 */ 1112 lp = sc->sc_dk.dk_label; 1113 sectorsize = lp->d_secsize; 1114 if ((size % sectorsize) != 0) 1115 return (EFAULT); 1116 totwrt = size / sectorsize; 1117 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1118 1119 nsects = lp->d_partitions[RDPART(dev)].p_size; 1120 sectoff = lp->d_partitions[RDPART(dev)].p_offset; 1121 1122 /* Check transfer bounds against partition size. */ 1123 if ((blkno < 0) || (blkno + totwrt) > nsects) 1124 return (EINVAL); 1125 1126 /* Offset block number to start of partition. */ 1127 blkno += sectoff; 1128 1129 while (totwrt > 0) { 1130 nwrt = totwrt; /* XXX */ 1131 #ifndef RD_DUMP_NOT_TRUSTED 1132 /* 1133 * Fill out and send GPIB command. 1134 */ 1135 sc->sc_ioc.c_unit = CS80CMD_SUNIT(sc->sc_punit); 1136 sc->sc_ioc.c_volume = CS80CMD_SVOL(0); 1137 sc->sc_ioc.c_saddr = CS80CMD_SADDR; 1138 sc->sc_ioc.c_hiaddr = 0; 1139 sc->sc_ioc.c_addr = RDBTOS(blkno); 1140 sc->sc_ioc.c_nop2 = CS80CMD_NOP; 1141 sc->sc_ioc.c_slen = CS80CMD_SLEN; 1142 sc->sc_ioc.c_len = nwrt * sectorsize; 1143 sc->sc_ioc.c_cmd = CS80CMD_WRITE; 1144 (void) gpibsend(sc->sc_ic, slave, CS80CMD_SCMD, 1145 &sc->sc_ioc.c_unit, sizeof(sc->sc_ioc)-3); 1146 if (gpibswait(sc->sc_ic, slave)) 1147 return (EIO); 1148 /* 1149 * Send the data. 1150 */ 1151 (void) gpibsend(sc->sc_ic, slave, CS80CMD_EXEC, va, 1152 nwrt * sectorsize); 1153 (void) gpibswait(sc->sc_ic, slave); 1154 (void) gpibrecv(sc->sc_ic, slave, CS80CMD_QSTAT, &stat, 1); 1155 if (stat) 1156 return (EIO); 1157 #else /* RD_DUMP_NOT_TRUSTED */ 1158 /* Let's just talk about this first... */ 1159 printf("%s: dump addr %p, blk %d\n", device_xname(sc->sc_dev), 1160 va, blkno); 1161 delay(500 * 1000); /* half a second */ 1162 #endif /* RD_DUMP_NOT_TRUSTED */ 1163 1164 /* update block count */ 1165 totwrt -= nwrt; 1166 blkno += nwrt; 1167 va = (char *)va + sectorsize * nwrt; 1168 } 1169 rddoingadump = 0; 1170 return (0); 1171 } 1172
Indexes created Thu Sep 25 15:09:46 GMT 2025