1 /* $NetBSD: rd.c,v 1.30 2012/02/02 19:43:02 tls 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 1.30 2012/02/02 19:43:02 tls 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 struct device 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(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 rdopen, rdclose, rdstrategy, rdioctl, rddump, rdsize, D_DISK 259 }; 260 261 const struct cdevsw rd_cdevsw = { 262 rdopen, rdclose, rdread, rdwrite, rdioctl, 263 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 264 }; 265 266 extern struct cfdriver rd_cd; 267 268 int 269 rdlookup(int id, int slave, int punit) 270 { 271 int i; 272 273 for (i = 0; i < numrdidentinfo; i++) { 274 if (rdidentinfo[i].ri_hwid == id) 275 break; 276 } 277 if (i == numrdidentinfo || punit > rdidentinfo[i].ri_maxunum) 278 return (-1); 279 return (i); 280 } 281 282 int 283 rdmatch(device_t parent, cfdata_t match, void *aux) 284 { 285 struct cs80bus_attach_args *ca = aux; 286 287 if (rdlookup(ca->ca_id, ca->ca_slave, ca->ca_punit) < 0) 288 return (0); 289 return (1); 290 } 291 292 void 293 rdattach(device_t parent, device_t self, void *aux) 294 { 295 struct rd_softc *sc = device_private(self); 296 struct cs80bus_attach_args *ca = aux; 297 struct cs80_description csd; 298 char name[7]; 299 int type, i, n; 300 301 sc->sc_ic = ca->ca_ic; 302 sc->sc_slave = ca->ca_slave; 303 sc->sc_punit = ca->ca_punit; 304 305 if ((type = rdlookup(ca->ca_id, ca->ca_slave, ca->ca_punit)) < 0) 306 return; 307 308 if (cs80reset(parent, sc->sc_slave, sc->sc_punit)) { 309 aprint_normal("\n"); 310 aprint_error_dev(&sc->sc_dev, "can't reset device\n"); 311 return; 312 } 313 314 if (cs80describe(parent, sc->sc_slave, sc->sc_punit, &csd)) { 315 aprint_normal("\n"); 316 aprint_error_dev(&sc->sc_dev, "didn't respond to describe command\n"); 317 return; 318 } 319 memset(name, 0, sizeof(name)); 320 for (i=0, n=0; i<3; i++) { 321 name[n++] = (csd.d_name[i] >> 4) + '0'; 322 name[n++] = (csd.d_name[i] & 0x0f) + '0'; 323 } 324 325 #ifdef DEBUG 326 if (rddebug & RDB_IDENT) { 327 printf("\n%s: name: ('%s')\n", 328 device_xname(&sc->sc_dev), name); 329 printf(" iuw %x, maxxfr %d, ctype %d\n", 330 csd.d_iuw, csd.d_cmaxxfr, csd.d_ctype); 331 printf(" utype %d, bps %d, blkbuf %d, burst %d, blktime %d\n", 332 csd.d_utype, csd.d_sectsize, 333 csd.d_blkbuf, csd.d_burstsize, csd.d_blocktime); 334 printf(" avxfr %d, ort %d, atp %d, maxint %d, fv %x, rv %x\n", 335 csd.d_uavexfr, csd.d_retry, csd.d_access, 336 csd.d_maxint, csd.d_fvbyte, csd.d_rvbyte); 337 printf(" maxcyl/head/sect %d/%d/%d, maxvsect %d, inter %d\n", 338 csd.d_maxcylhead >> 8, csd.d_maxcylhead & 0xff, 339 csd.d_maxsect, csd.d_maxvsectl, csd.d_interleave); 340 printf("%s", device_xname(&sc->sc_dev)); 341 } 342 #endif 343 344 /* 345 * Take care of a couple of anomolies: 346 * 1. 7945A and 7946A both return same HW id 347 * 2. 9122S and 9134D both return same HW id 348 * 3. 9122D and 9134L both return same HW id 349 */ 350 switch (ca->ca_id) { 351 case RD7946AID: 352 if (memcmp(name, "079450", 6) == 0) 353 type = RD7945A; 354 else 355 type = RD7946A; 356 break; 357 358 case RD9134LID: 359 if (memcmp(name, "091340", 6) == 0) 360 type = RD9134L; 361 else 362 type = RD9122D; 363 break; 364 365 case RD9134DID: 366 if (memcmp(name, "091220", 6) == 0) 367 type = RD9122S; 368 else 369 type = RD9134D; 370 break; 371 } 372 373 sc->sc_type = type; 374 375 /* 376 * XXX We use DEV_BSIZE instead of the sector size value pulled 377 * XXX off the driver because all of this code assumes 512 byte 378 * XXX blocks. ICK! 379 */ 380 printf(": %s\n", rdidentinfo[type].ri_desc); 381 printf("%s: %d cylinders, %d heads, %d blocks, %d bytes/block\n", 382 device_xname(&sc->sc_dev), rdidentinfo[type].ri_ncyl, 383 rdidentinfo[type].ri_ntpc, rdidentinfo[type].ri_nblocks, 384 DEV_BSIZE); 385 386 bufq_alloc(&sc->sc_tab, "fcfs", 0); 387 388 /* 389 * Initialize and attach the disk structure. 390 */ 391 memset(&sc->sc_dk, 0, sizeof(sc->sc_dk)); 392 disk_init(&sc->sc_dk, device_xname(&sc->sc_dev), NULL); 393 disk_attach(&sc->sc_dk); 394 395 callout_init(&sc->sc_restart_ch, 0); 396 397 if (gpibregister(sc->sc_ic, sc->sc_slave, rdcallback, sc, 398 &sc->sc_hdl)) { 399 aprint_error_dev(&sc->sc_dev, "can't register callback\n"); 400 return; 401 } 402 403 sc->sc_flags = RDF_ALIVE; 404 #ifdef DEBUG 405 /* always report errors */ 406 if (rddebug & RDB_ERROR) 407 rderrthresh = 0; 408 #endif 409 /* 410 * attach the device into the random source list 411 */ 412 rnd_attach_source(&sc->rnd_source, device_xname(&sc->sc_dev), 413 RND_TYPE_DISK, 0); 414 } 415 416 /* 417 * Read or construct a disklabel 418 */ 419 int 420 rdgetinfo(struct rd_softc *sc) 421 { 422 struct disklabel *lp = sc->sc_dk.dk_label; 423 struct partition *pi; 424 const char *msg; 425 426 memset(sc->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel)); 427 428 rdgetdefaultlabel(sc, lp); 429 430 /* 431 * Call the generic disklabel extraction routine 432 */ 433 msg = readdisklabel(RDMAKEDEV(0, device_unit(&sc->sc_dev), RAW_PART), 434 rdstrategy, lp, NULL); 435 if (msg == NULL) 436 return (0); 437 438 pi = lp->d_partitions; 439 printf("%s: WARNING: %s\n", device_xname(&sc->sc_dev), msg); 440 441 pi[RAW_PART].p_size = rdidentinfo[sc->sc_type].ri_nblocks; 442 lp->d_npartitions = RAW_PART+1; 443 pi[0].p_size = 0; 444 445 return (0); 446 } 447 448 int 449 rdopen(dev_t dev, int flags, int mode, struct lwp *l) 450 { 451 struct rd_softc *sc; 452 int error, mask, part; 453 454 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 455 if (sc == NULL || (sc->sc_flags & RDF_ALIVE) ==0) 456 return (ENXIO); 457 458 /* 459 * Wait for any pending opens/closes to complete 460 */ 461 while (sc->sc_flags & (RDF_OPENING | RDF_CLOSING)) 462 (void) tsleep(sc, PRIBIO, "rdopen", 0); 463 464 /* 465 * On first open, get label and partition info. 466 * We may block reading the label, so be careful 467 * to stop any other opens. 468 */ 469 if (sc->sc_dk.dk_openmask == 0) { 470 sc->sc_flags |= RDF_OPENING; 471 error = rdgetinfo(sc); 472 sc->sc_flags &= ~RDF_OPENING; 473 wakeup((void *)sc); 474 if (error) 475 return (error); 476 } 477 478 part = RDPART(dev); 479 mask = 1 << part; 480 481 /* Check that the partition exists. */ 482 if (part != RAW_PART && (part > sc->sc_dk.dk_label->d_npartitions || 483 sc->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) 484 return (ENXIO); 485 486 /* Ensure only one open at a time. */ 487 switch (mode) { 488 case S_IFCHR: 489 sc->sc_dk.dk_copenmask |= mask; 490 break; 491 case S_IFBLK: 492 sc->sc_dk.dk_bopenmask |= mask; 493 break; 494 } 495 sc->sc_dk.dk_openmask = 496 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 497 498 return (0); 499 } 500 501 int 502 rdclose(dev_t dev, int flag, int mode, struct lwp *l) 503 { 504 struct rd_softc *sc; 505 struct disk *dk; 506 int mask, s; 507 508 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 509 if (sc == NULL) 510 return (ENXIO); 511 512 dk = &sc->sc_dk; 513 514 mask = 1 << RDPART(dev); 515 if (mode == S_IFCHR) 516 dk->dk_copenmask &= ~mask; 517 else 518 dk->dk_bopenmask &= ~mask; 519 dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask; 520 /* 521 * On last close, we wait for all activity to cease since 522 * the label/parition info will become invalid. Since we 523 * might sleep, we must block any opens while we are here. 524 * Note we don't have to about other closes since we know 525 * we are the last one. 526 */ 527 if (dk->dk_openmask == 0) { 528 sc->sc_flags |= RDF_CLOSING; 529 s = splbio(); 530 while (sc->sc_active) { 531 sc->sc_flags |= RDF_WANTED; 532 (void) tsleep(&sc->sc_tab, PRIBIO, "rdclose", 0); 533 } 534 splx(s); 535 sc->sc_flags &= ~(RDF_CLOSING | RDF_WLABEL); 536 wakeup((void *)sc); 537 } 538 return (0); 539 } 540 541 void 542 rdstrategy(struct buf *bp) 543 { 544 struct rd_softc *sc; 545 struct partition *pinfo; 546 daddr_t bn; 547 int sz, s; 548 int offset; 549 550 sc = device_lookup_private(&rd_cd, RDUNIT(bp->b_dev)); 551 552 DPRINTF(RDB_FOLLOW, 553 ("rdstrategy(%p): dev %" PRIx64 ", bn %" PRId64 ", bcount %d, %c\n", 554 bp, bp->b_dev, bp->b_blkno, bp->b_bcount, 555 (bp->b_flags & B_READ) ? 'R' : 'W')); 556 557 bn = bp->b_blkno; 558 sz = howmany(bp->b_bcount, DEV_BSIZE); 559 pinfo = &sc->sc_dk.dk_label->d_partitions[RDPART(bp->b_dev)]; 560 561 /* Don't perform partition translation on RAW_PART. */ 562 offset = (RDPART(bp->b_dev) == RAW_PART) ? 0 : pinfo->p_offset; 563 564 if (RDPART(bp->b_dev) != RAW_PART) { 565 /* 566 * XXX This block of code belongs in 567 * XXX bounds_check_with_label() 568 */ 569 570 if (bn < 0 || bn + sz > pinfo->p_size) { 571 sz = pinfo->p_size - bn; 572 if (sz == 0) { 573 bp->b_resid = bp->b_bcount; 574 goto done; 575 } 576 if (sz < 0) { 577 bp->b_error = EINVAL; 578 goto done; 579 } 580 bp->b_bcount = dbtob(sz); 581 } 582 /* 583 * Check for write to write protected label 584 */ 585 if (bn + offset <= LABELSECTOR && 586 #if LABELSECTOR != 0 587 bn + offset + sz > LABELSECTOR && 588 #endif 589 !(bp->b_flags & B_READ) && !(sc->sc_flags & RDF_WLABEL)) { 590 bp->b_error = EROFS; 591 goto done; 592 } 593 } 594 bp->b_rawblkno = bn + offset; 595 s = splbio(); 596 bufq_put(sc->sc_tab, bp); 597 if (sc->sc_active == 0) { 598 sc->sc_active = 1; 599 rdustart(sc); 600 } 601 splx(s); 602 return; 603 done: 604 biodone(bp); 605 } 606 607 /* 608 * Called from timeout() when handling maintenance releases 609 * callout from timeouts 610 */ 611 void 612 rdrestart(void *arg) 613 { 614 int s = splbio(); 615 rdustart((struct rd_softc *)arg); 616 splx(s); 617 } 618 619 620 /* called by rdstrategy() to start a block transfer */ 621 /* called by rdrestart() when handingly timeouts */ 622 /* called by rdintr() */ 623 void 624 rdustart(struct rd_softc *sc) 625 { 626 struct buf *bp; 627 628 bp = bufq_peek(sc->sc_tab); 629 sc->sc_addr = bp->b_data; 630 sc->sc_resid = bp->b_bcount; 631 if (gpibrequest(sc->sc_ic, sc->sc_hdl)) 632 rdstart(sc); 633 } 634 635 struct buf * 636 rdfinish(struct rd_softc *sc, struct buf *bp) 637 { 638 639 sc->sc_errcnt = 0; 640 (void)bufq_get(sc->sc_tab); 641 bp->b_resid = 0; 642 biodone(bp); 643 gpibrelease(sc->sc_ic, sc->sc_hdl); 644 if ((bp = bufq_peek(sc->sc_tab)) != NULL) 645 return (bp); 646 sc->sc_active = 0; 647 if (sc->sc_flags & RDF_WANTED) { 648 sc->sc_flags &= ~RDF_WANTED; 649 wakeup((void *)&sc->sc_tab); 650 } 651 return (NULL); 652 } 653 654 void 655 rdcallback(void *v, int action) 656 { 657 struct rd_softc *sc = v; 658 659 DPRINTF(RDB_FOLLOW, ("rdcallback: v=%p, action=%d\n", v, action)); 660 661 switch (action) { 662 case GPIBCBF_START: 663 rdstart(sc); 664 break; 665 case GPIBCBF_INTR: 666 rdintr(sc); 667 break; 668 #ifdef DEBUG 669 default: 670 DPRINTF(RDB_ERROR, ("rdcallback: unknown action %d\n", 671 action)); 672 break; 673 #endif 674 } 675 } 676 677 678 /* called from rdustart() to start a transfer */ 679 /* called from gpib interface as the initiator */ 680 void 681 rdstart(struct rd_softc *sc) 682 { 683 struct buf *bp = bufq_peek(sc->sc_tab); 684 int part, slave, punit; 685 686 slave = sc->sc_slave; 687 punit = sc->sc_punit; 688 689 DPRINTF(RDB_FOLLOW, ("rdstart(%s): bp %p, %c\n", 690 device_xname(&sc->sc_dev), bp, (bp->b_flags & B_READ) ? 'R' : 'W')); 691 692 again: 693 694 part = RDPART(bp->b_dev); 695 sc->sc_flags |= RDF_SEEK; 696 sc->sc_ioc.c_unit = CS80CMD_SUNIT(punit); 697 sc->sc_ioc.c_volume = CS80CMD_SVOL(0); 698 sc->sc_ioc.c_saddr = CS80CMD_SADDR; 699 sc->sc_ioc.c_hiaddr = htobe16(0); 700 sc->sc_ioc.c_addr = htobe32(RDBTOS(bp->b_rawblkno)); 701 sc->sc_ioc.c_nop2 = CS80CMD_NOP; 702 sc->sc_ioc.c_slen = CS80CMD_SLEN; 703 sc->sc_ioc.c_len = htobe32(sc->sc_resid); 704 sc->sc_ioc.c_cmd = bp->b_flags & B_READ ? CS80CMD_READ : CS80CMD_WRITE; 705 706 if (gpibsend(sc->sc_ic, slave, CS80CMD_SCMD, &sc->sc_ioc.c_unit, 707 sizeof(sc->sc_ioc)-1) == sizeof(sc->sc_ioc)-1) { 708 /* Instrumentation. */ 709 disk_busy(&sc->sc_dk); 710 iostat_seek(sc->sc_dk.dk_stats); 711 gpibawait(sc->sc_ic); 712 return; 713 } 714 /* 715 * Experience has shown that the gpibwait in this gpibsend will 716 * occasionally timeout. It appears to occur mostly on old 7914 717 * drives with full maintenance tracks. We should probably 718 * integrate this with the backoff code in rderror. 719 */ 720 721 DPRINTF(RDB_ERROR, 722 ("rdstart: cmd %x adr %ul blk %" PRId64 " len %d ecnt %d\n", 723 sc->sc_ioc.c_cmd, sc->sc_ioc.c_addr, bp->b_blkno, sc->sc_resid, 724 sc->sc_errcnt)); 725 726 sc->sc_flags &= ~RDF_SEEK; 727 cs80reset(device_parent(&sc->sc_dev), slave, punit); 728 if (sc->sc_errcnt++ < RDRETRY) 729 goto again; 730 printf("%s: rdstart err: cmd 0x%x sect %uld blk %" PRId64 " len %d\n", 731 device_xname(&sc->sc_dev), sc->sc_ioc.c_cmd, sc->sc_ioc.c_addr, 732 bp->b_blkno, sc->sc_resid); 733 bp->b_error = EIO; 734 bp = rdfinish(sc, bp); 735 if (bp) { 736 sc->sc_addr = bp->b_data; 737 sc->sc_resid = bp->b_bcount; 738 if (gpibrequest(sc->sc_ic, sc->sc_hdl)) 739 goto again; 740 } 741 } 742 743 void 744 rdintr(struct rd_softc *sc) 745 { 746 struct buf *bp; 747 u_int8_t stat = 13; /* in case gpibrecv fails */ 748 int rv, dir, restart, slave; 749 750 slave = sc->sc_slave; 751 bp = bufq_peek(sc->sc_tab); 752 753 DPRINTF(RDB_FOLLOW, ("rdintr(%s): bp %p, %c, flags %x\n", 754 device_xname(&sc->sc_dev), bp, (bp->b_flags & B_READ) ? 'R' : 'W', 755 sc->sc_flags)); 756 757 disk_unbusy(&sc->sc_dk, (bp->b_bcount - bp->b_resid), 758 (bp->b_flags & B_READ)); 759 760 if (sc->sc_flags & RDF_SEEK) { 761 sc->sc_flags &= ~RDF_SEEK; 762 dir = (bp->b_flags & B_READ ? GPIB_READ : GPIB_WRITE); 763 gpibxfer(sc->sc_ic, slave, CS80CMD_EXEC, sc->sc_addr, 764 sc->sc_resid, dir, dir == GPIB_READ); 765 disk_busy(&sc->sc_dk); 766 return; 767 } 768 if ((sc->sc_flags & RDF_SWAIT) == 0) { 769 if (gpibpptest(sc->sc_ic, slave) == 0) { 770 /* Instrumentation. */ 771 disk_busy(&sc->sc_dk); 772 sc->sc_flags |= RDF_SWAIT; 773 gpibawait(sc->sc_ic); 774 return; 775 } 776 } else 777 sc->sc_flags &= ~RDF_SWAIT; 778 rv = gpibrecv(sc->sc_ic, slave, CS80CMD_QSTAT, &stat, 1); 779 if (rv != 1 || stat) { 780 DPRINTF(RDB_ERROR, 781 ("rdintr: receive failed (rv=%d) or bad stat %d\n", rv, 782 stat)); 783 restart = rderror(sc); 784 if (sc->sc_errcnt++ < RDRETRY) { 785 if (restart) 786 rdstart(sc); 787 return; 788 } 789 bp->b_error = EIO; 790 } 791 if (rdfinish(sc, bp) != NULL) 792 rdustart(sc); 793 rnd_add_uint32(&sc->rnd_source, bp->b_blkno); 794 } 795 796 /* 797 * Deal with errors. 798 * Returns 1 if request should be restarted, 799 * 0 if we should just quietly give up. 800 */ 801 int 802 rderror(struct rd_softc *sc) 803 { 804 struct cs80_stat css; 805 struct buf *bp; 806 daddr_t hwbn, pbn; 807 808 DPRINTF(RDB_FOLLOW, ("rderror: sc=%p\n", sc)); 809 810 if (cs80status(device_parent(&sc->sc_dev), sc->sc_slave, 811 sc->sc_punit, &css)) { 812 cs80reset(device_parent(&sc->sc_dev), sc->sc_slave, 813 sc->sc_punit); 814 return (1); 815 } 816 #ifdef DEBUG 817 if (rddebug & RDB_ERROR) { /* status info */ 818 printf("\n volume: %d, unit: %d\n", 819 (css.c_vu>>4)&0xF, css.c_vu&0xF); 820 printf(" reject 0x%x\n", css.c_ref); 821 printf(" fault 0x%x\n", css.c_fef); 822 printf(" access 0x%x\n", css.c_aef); 823 printf(" info 0x%x\n", css.c_ief); 824 printf(" block, P1-P10: "); 825 printf("0x%x", *(u_int32_t *)&css.c_raw[0]); 826 printf("0x%x", *(u_int32_t *)&css.c_raw[4]); 827 printf("0x%x\n", *(u_int16_t *)&css.c_raw[8]); 828 } 829 #endif 830 if (css.c_fef & FEF_REXMT) 831 return (1); 832 if (css.c_fef & FEF_PF) { 833 cs80reset(device_parent(&sc->sc_dev), sc->sc_slave, 834 sc->sc_punit); 835 return (1); 836 } 837 /* 838 * Unit requests release for internal maintenance. 839 * We just delay awhile and try again later. Use expontially 840 * increasing backoff ala ethernet drivers since we don't really 841 * know how long the maintenance will take. With RDWAITC and 842 * RDRETRY as defined, the range is 1 to 32 seconds. 843 */ 844 if (css.c_fef & FEF_IMR) { 845 extern int hz; 846 int rdtimo = RDWAITC << sc->sc_errcnt; 847 DPRINTF(RDB_STATUS, 848 ("%s: internal maintenance, %d-second timeout\n", 849 device_xname(&sc->sc_dev), rdtimo)); 850 gpibrelease(sc->sc_ic, sc->sc_hdl); 851 callout_reset(&sc->sc_restart_ch, rdtimo * hz, rdrestart, sc); 852 return (0); 853 } 854 /* 855 * Only report error if we have reached the error reporting 856 * threshhold. By default, this will only report after the 857 * retry limit has been exceeded. 858 */ 859 if (sc->sc_errcnt < rderrthresh) 860 return (1); 861 862 /* 863 * First conjure up the block number at which the error occurred. 864 */ 865 bp = bufq_peek(sc->sc_tab); 866 pbn = sc->sc_dk.dk_label->d_partitions[RDPART(bp->b_dev)].p_offset; 867 if ((css.c_fef & FEF_CU) || (css.c_fef & FEF_DR) || 868 (css.c_ief & IEF_RRMASK)) { 869 /* 870 * Not all errors report a block number, just use b_blkno. 871 */ 872 hwbn = RDBTOS(pbn + bp->b_blkno); 873 pbn = bp->b_blkno; 874 } else { 875 hwbn = css.c_blk; 876 pbn = RDSTOB(hwbn) - pbn; 877 } 878 #ifdef DEBUG 879 if (rddebug & RDB_ERROR) { /* status info */ 880 printf("\n volume: %d, unit: %d\n", 881 (css.c_vu>>4)&0xF, css.c_vu&0xF); 882 printf(" reject 0x%x\n", css.c_ref); 883 printf(" fault 0x%x\n", css.c_fef); 884 printf(" access 0x%x\n", css.c_aef); 885 printf(" info 0x%x\n", css.c_ief); 886 printf(" block, P1-P10: "); 887 printf(" block: %" PRId64 ", P1-P10: ", hwbn); 888 printf("0x%x", *(u_int32_t *)&css.c_raw[0]); 889 printf("0x%x", *(u_int32_t *)&css.c_raw[4]); 890 printf("0x%x\n", *(u_int16_t *)&css.c_raw[8]); 891 } 892 #endif 893 #ifdef DEBUG 894 if (rddebug & RDB_ERROR) { /* command */ 895 printf(" ioc: "); 896 printf("0x%x", *(u_int32_t *)&sc->sc_ioc.c_pad); 897 printf("0x%x", *(u_int16_t *)&sc->sc_ioc.c_hiaddr); 898 printf("0x%x", *(u_int32_t *)&sc->sc_ioc.c_addr); 899 printf("0x%x", *(u_int16_t *)&sc->sc_ioc.c_nop2); 900 printf("0x%x", *(u_int32_t *)&sc->sc_ioc.c_len); 901 printf("0x%x\n", *(u_int16_t *)&sc->sc_ioc.c_cmd); 902 return (1); 903 } 904 #endif 905 /* 906 * Now output a generic message suitable for badsect. 907 * Note that we don't use harderr because it just prints 908 * out b_blkno which is just the beginning block number 909 * of the transfer, not necessary where the error occurred. 910 */ 911 printf("%s%c: hard error, sector number %" PRId64 "\n", 912 device_xname(&sc->sc_dev), 'a'+RDPART(bp->b_dev), pbn); 913 /* 914 * Now report the status as returned by the hardware with 915 * attempt at interpretation. 916 */ 917 printf("%s %s error:", device_xname(&sc->sc_dev), 918 (bp->b_flags & B_READ) ? "read" : "write"); 919 printf(" unit %d, volume %d R0x%x F0x%x A0x%x I0x%x\n", 920 css.c_vu&0xF, (css.c_vu>>4)&0xF, 921 css.c_ref, css.c_fef, css.c_aef, css.c_ief); 922 printf("P1-P10: "); 923 printf("0x%x ", *(u_int32_t *)&css.c_raw[0]); 924 printf("0x%x ", *(u_int32_t *)&css.c_raw[4]); 925 printf("0x%x\n", *(u_int16_t *)&css.c_raw[8]); 926 927 return (1); 928 } 929 930 int 931 rdread(dev_t dev, struct uio *uio, int flags) 932 { 933 934 return (physio(rdstrategy, NULL, dev, B_READ, minphys, uio)); 935 } 936 937 int 938 rdwrite(dev_t dev, struct uio *uio, int flags) 939 { 940 941 return (physio(rdstrategy, NULL, dev, B_WRITE, minphys, uio)); 942 } 943 944 int 945 rdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 946 { 947 struct rd_softc *sc; 948 struct disklabel *lp; 949 int error, flags; 950 951 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 952 if (sc == NULL) 953 return (ENXIO); 954 lp = sc->sc_dk.dk_label; 955 956 DPRINTF(RDB_FOLLOW, ("rdioctl: sc=%p\n", sc)); 957 958 switch (cmd) { 959 case DIOCGDINFO: 960 *(struct disklabel *)data = *lp; 961 return (0); 962 963 case DIOCGPART: 964 ((struct partinfo *)data)->disklab = lp; 965 ((struct partinfo *)data)->part = 966 &lp->d_partitions[RDPART(dev)]; 967 return (0); 968 969 case DIOCWLABEL: 970 if ((flag & FWRITE) == 0) 971 return (EBADF); 972 if (*(int *)data) 973 sc->sc_flags |= RDF_WLABEL; 974 else 975 sc->sc_flags &= ~RDF_WLABEL; 976 return (0); 977 978 case DIOCSDINFO: 979 if ((flag & FWRITE) == 0) 980 return (EBADF); 981 return (setdisklabel(lp, (struct disklabel *)data, 982 (sc->sc_flags & RDF_WLABEL) ? 0 : sc->sc_dk.dk_openmask, 983 (struct cpu_disklabel *)0)); 984 985 case DIOCWDINFO: 986 if ((flag & FWRITE) == 0) 987 return (EBADF); 988 error = setdisklabel(lp, (struct disklabel *)data, 989 (sc->sc_flags & RDF_WLABEL) ? 0 : sc->sc_dk.dk_openmask, 990 (struct cpu_disklabel *)0); 991 if (error) 992 return (error); 993 flags = sc->sc_flags; 994 sc->sc_flags = RDF_ALIVE | RDF_WLABEL; 995 error = writedisklabel(RDLABELDEV(dev), rdstrategy, lp, 996 (struct cpu_disklabel *)0); 997 sc->sc_flags = flags; 998 return (error); 999 1000 case DIOCGDEFLABEL: 1001 rdgetdefaultlabel(sc, (struct disklabel *)data); 1002 return (0); 1003 } 1004 return (EINVAL); 1005 } 1006 1007 void 1008 rdgetdefaultlabel(struct rd_softc *sc, struct disklabel *lp) 1009 { 1010 int type = sc->sc_type; 1011 1012 memset((void *)lp, 0, sizeof(struct disklabel)); 1013 1014 lp->d_type = DTYPE_HPIB /* DTYPE_GPIB */; 1015 lp->d_secsize = DEV_BSIZE; 1016 lp->d_nsectors = rdidentinfo[type].ri_nbpt; 1017 lp->d_ntracks = rdidentinfo[type].ri_ntpc; 1018 lp->d_ncylinders = rdidentinfo[type].ri_ncyl; 1019 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 1020 lp->d_secperunit = lp->d_ncylinders * lp->d_secpercyl; 1021 1022 strncpy(lp->d_typename, rdidentinfo[type].ri_desc, 16); 1023 strncpy(lp->d_packname, "fictitious", 16); 1024 lp->d_rpm = 3000; 1025 lp->d_interleave = 1; 1026 lp->d_flags = 0; 1027 1028 lp->d_partitions[RAW_PART].p_offset = 0; 1029 lp->d_partitions[RAW_PART].p_size = 1030 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 1031 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1032 lp->d_npartitions = RAW_PART + 1; 1033 1034 lp->d_magic = DISKMAGIC; 1035 lp->d_magic2 = DISKMAGIC; 1036 lp->d_checksum = dkcksum(lp); 1037 } 1038 1039 int 1040 rdsize(dev_t dev) 1041 { 1042 struct rd_softc *sc; 1043 int psize, didopen = 0; 1044 1045 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 1046 if (sc == NULL || (sc->sc_flags & RDF_ALIVE) == 0) 1047 return (-1); 1048 1049 /* 1050 * We get called very early on (via swapconf) 1051 * without the device being open so we may need 1052 * to handle it here. 1053 */ 1054 if (sc->sc_dk.dk_openmask == 0) { 1055 if (rdopen(dev, FREAD | FWRITE, S_IFBLK, NULL)) 1056 return (-1); 1057 didopen = 1; 1058 } 1059 psize = sc->sc_dk.dk_label->d_partitions[RDPART(dev)].p_size * 1060 (sc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1061 if (didopen) 1062 (void) rdclose(dev, FREAD | FWRITE, S_IFBLK, NULL); 1063 return (psize); 1064 } 1065 1066 1067 static int rddoingadump; /* simple mutex */ 1068 1069 /* 1070 * Non-interrupt driven, non-dma dump routine. 1071 */ 1072 int 1073 rddump(dev_t dev, daddr_t blkno, void *va, size_t size) 1074 { 1075 struct rd_softc *sc; 1076 int sectorsize; /* size of a disk sector */ 1077 int nsects; /* number of sectors in partition */ 1078 int sectoff; /* sector offset of partition */ 1079 int totwrt; /* total number of sectors left to write */ 1080 int nwrt; /* current number of sectors to write */ 1081 int slave; 1082 struct disklabel *lp; 1083 u_int8_t stat; 1084 1085 /* Check for recursive dump; if so, punt. */ 1086 if (rddoingadump) 1087 return (EFAULT); 1088 rddoingadump = 1; 1089 1090 sc = device_lookup_private(&rd_cd, RDUNIT(dev)); 1091 if (sc == NULL || (sc->sc_flags & RDF_ALIVE) == 0) 1092 return (ENXIO); 1093 1094 DPRINTF(RDB_FOLLOW, ("rddump: sc=%p\n", sc)); 1095 1096 slave = sc->sc_slave; 1097 1098 /* 1099 * Convert to disk sectors. Request must be a multiple of size. 1100 */ 1101 lp = sc->sc_dk.dk_label; 1102 sectorsize = lp->d_secsize; 1103 if ((size % sectorsize) != 0) 1104 return (EFAULT); 1105 totwrt = size / sectorsize; 1106 blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ 1107 1108 nsects = lp->d_partitions[RDPART(dev)].p_size; 1109 sectoff = lp->d_partitions[RDPART(dev)].p_offset; 1110 1111 /* Check transfer bounds against partition size. */ 1112 if ((blkno < 0) || (blkno + totwrt) > nsects) 1113 return (EINVAL); 1114 1115 /* Offset block number to start of partition. */ 1116 blkno += sectoff; 1117 1118 while (totwrt > 0) { 1119 nwrt = totwrt; /* XXX */ 1120 #ifndef RD_DUMP_NOT_TRUSTED 1121 /* 1122 * Fill out and send GPIB command. 1123 */ 1124 sc->sc_ioc.c_unit = CS80CMD_SUNIT(sc->sc_punit); 1125 sc->sc_ioc.c_volume = CS80CMD_SVOL(0); 1126 sc->sc_ioc.c_saddr = CS80CMD_SADDR; 1127 sc->sc_ioc.c_hiaddr = 0; 1128 sc->sc_ioc.c_addr = RDBTOS(blkno); 1129 sc->sc_ioc.c_nop2 = CS80CMD_NOP; 1130 sc->sc_ioc.c_slen = CS80CMD_SLEN; 1131 sc->sc_ioc.c_len = nwrt * sectorsize; 1132 sc->sc_ioc.c_cmd = CS80CMD_WRITE; 1133 (void) gpibsend(sc->sc_ic, slave, CS80CMD_SCMD, 1134 &sc->sc_ioc.c_unit, sizeof(sc->sc_ioc)-3); 1135 if (gpibswait(sc->sc_ic, slave)) 1136 return (EIO); 1137 /* 1138 * Send the data. 1139 */ 1140 (void) gpibsend(sc->sc_ic, slave, CS80CMD_EXEC, va, 1141 nwrt * sectorsize); 1142 (void) gpibswait(sc->sc_ic, slave); 1143 (void) gpibrecv(sc->sc_ic, slave, CS80CMD_QSTAT, &stat, 1); 1144 if (stat) 1145 return (EIO); 1146 #else /* RD_DUMP_NOT_TRUSTED */ 1147 /* Let's just talk about this first... */ 1148 printf("%s: dump addr %p, blk %d\n", device_xname(&sc->sc_dev), 1149 va, blkno); 1150 delay(500 * 1000); /* half a second */ 1151 #endif /* RD_DUMP_NOT_TRUSTED */ 1152 1153 /* update block count */ 1154 totwrt -= nwrt; 1155 blkno += nwrt; 1156 va = (char *)va + sectorsize * nwrt; 1157 } 1158 rddoingadump = 0; 1159 return (0); 1160 } 1161