1 /* $NetBSD: siop.c,v 1.68 2014/01/22 00:25:16 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Van Jacobson of Lawrence Berkeley Laboratory. 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 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)siop.c 7.5 (Berkeley) 5/4/91 35 */ 36 37 /* 38 * Copyright (c) 1994 Michael L. Hitch 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Van Jacobson of Lawrence Berkeley Laboratory. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 55 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 56 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 57 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 61 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 * @(#)siop.c 7.5 (Berkeley) 5/4/91 64 */ 65 66 /* 67 * AMIGA 53C710 scsi adaptor driver 68 */ 69 70 #include "opt_ddb.h" 71 72 #include <sys/cdefs.h> 73 __KERNEL_RCSID(0, "$NetBSD: siop.c,v 1.68 2014/01/22 00:25:16 christos Exp $"); 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/callout.h> 78 #include <sys/kernel.h> 79 #include <sys/device.h> 80 #include <sys/disklabel.h> 81 #include <sys/buf.h> 82 #include <sys/malloc.h> 83 84 #include <dev/scsipi/scsi_all.h> 85 #include <dev/scsipi/scsipi_all.h> 86 #include <dev/scsipi/scsiconf.h> 87 #include <machine/cpu.h> 88 #ifdef __m68k__ 89 #include <m68k/cacheops.h> 90 #else 91 #define DCIAS(pa) 92 #endif 93 #include <amiga/amiga/custom.h> 94 #include <amiga/amiga/isr.h> 95 #include <amiga/dev/siopreg.h> 96 #include <amiga/dev/siopvar.h> 97 98 /* 99 * SCSI delays 100 * In u-seconds, primarily for state changes on the SPC. 101 */ 102 #define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */ 103 #define SCSI_DATA_WAIT 500000 /* wait per data in/out step */ 104 #define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */ 105 106 void siop_select(struct siop_softc *); 107 void siopabort(struct siop_softc *, siop_regmap_p, const char *); 108 void sioperror(struct siop_softc *, siop_regmap_p, u_char); 109 void siopstart(struct siop_softc *); 110 int siop_checkintr(struct siop_softc *, u_char, u_char, u_char, int *); 111 void siopreset(struct siop_softc *); 112 void siopsetdelay(int); 113 void siop_scsidone(struct siop_acb *, int); 114 void siop_timeout(void *); 115 void siop_sched(struct siop_softc *); 116 void siop_poll(struct siop_softc *, struct siop_acb *); 117 void siopintr(struct siop_softc *); 118 void scsi_period_to_siop(struct siop_softc *, int); 119 void siop_start(struct siop_softc *, int, int, u_char *, int, u_char *, int); 120 void siop_dump_acb(struct siop_acb *); 121 122 /* 53C710 script */ 123 const 124 #include <amiga/dev/siop_script.out> 125 126 /* default to not inhibit sync negotiation on any drive */ 127 u_char siop_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */ 128 u_char siop_allow_disc[8] = {3, 3, 3, 3, 3, 3, 3, 3}; 129 int siop_no_dma = 0; 130 131 int siop_reset_delay = 250; /* delay after reset, in milleseconds */ 132 133 int siop_cmd_wait = SCSI_CMD_WAIT; 134 int siop_data_wait = SCSI_DATA_WAIT; 135 int siop_init_wait = SCSI_INIT_WAIT; 136 137 #ifdef DEBUG_SYNC 138 /* 139 * sync period transfer lookup - only valid for 66 MHz clock 140 */ 141 static struct { 142 unsigned char p; /* period from sync request message */ 143 unsigned char r; /* siop_period << 4 | sbcl */ 144 } sync_tab[] = { 145 { 60/4, 0<<4 | 1}, 146 { 76/4, 1<<4 | 1}, 147 { 92/4, 2<<4 | 1}, 148 { 92/4, 0<<4 | 2}, 149 {108/4, 3<<4 | 1}, 150 {116/4, 1<<4 | 2}, 151 {120/4, 4<<4 | 1}, 152 {120/4, 0<<4 | 3}, 153 {136/4, 5<<4 | 1}, 154 {140/4, 2<<4 | 2}, 155 {152/4, 6<<4 | 1}, 156 {152/4, 1<<4 | 3}, 157 {164/4, 3<<4 | 2}, 158 {168/4, 7<<4 | 1}, 159 {180/4, 2<<4 | 3}, 160 {184/4, 4<<4 | 2}, 161 {208/4, 5<<4 | 2}, 162 {212/4, 3<<4 | 3}, 163 {232/4, 6<<4 | 2}, 164 {240/4, 4<<4 | 3}, 165 {256/4, 7<<4 | 2}, 166 {272/4, 5<<4 | 3}, 167 {300/4, 6<<4 | 3}, 168 {332/4, 7<<4 | 3} 169 }; 170 #endif 171 172 #ifdef DEBUG 173 /* 174 * 0x01 - full debug 175 * 0x02 - DMA chaining 176 * 0x04 - siopintr 177 * 0x08 - phase mismatch 178 * 0x10 - <not used> 179 * 0x20 - panic on unhandled exceptions 180 * 0x100 - disconnect/reselect 181 */ 182 int siop_debug = 0; 183 int siopsync_debug = 0; 184 int siopdma_hits = 0; 185 int siopdma_misses = 0; 186 int siopchain_ints = 0; 187 int siopstarts = 0; 188 int siopints = 0; 189 int siopphmm = 0; 190 #define SIOP_TRACE_SIZE 128 191 #define SIOP_TRACE(a,b,c,d) \ 192 siop_trbuf[siop_trix] = (a); \ 193 siop_trbuf[siop_trix+1] = (b); \ 194 siop_trbuf[siop_trix+2] = (c); \ 195 siop_trbuf[siop_trix+3] = (d); \ 196 siop_trix = (siop_trix + 4) & (SIOP_TRACE_SIZE - 1); 197 u_char siop_trbuf[SIOP_TRACE_SIZE]; 198 int siop_trix; 199 void siop_dump(struct siop_softc *); 200 void siop_dump_trace(void); 201 #else 202 #define SIOP_TRACE(a,b,c,d) 203 #endif 204 205 206 /* 207 * default minphys routine for siop based controllers 208 */ 209 void 210 siop_minphys(struct buf *bp) 211 { 212 213 /* 214 * No max transfer at this level. 215 */ 216 minphys(bp); 217 } 218 219 /* 220 * used by specific siop controller 221 * 222 */ 223 void 224 siop_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 225 void *arg) 226 { 227 struct scsipi_xfer *xs; 228 #ifdef DIAGNOSTIC 229 struct scsipi_periph *periph; 230 #endif 231 struct siop_acb *acb; 232 struct siop_softc *sc = device_private(chan->chan_adapter->adapt_dev); 233 int flags, s; 234 235 switch (req) { 236 case ADAPTER_REQ_RUN_XFER: 237 xs = arg; 238 #ifdef DIAGNOSTIC 239 periph = xs->xs_periph; 240 #endif 241 flags = xs->xs_control; 242 243 /* XXXX ?? */ 244 if (flags & XS_CTL_DATA_UIO) 245 panic("siop: scsi data uio requested"); 246 247 /* XXXX ?? */ 248 if (sc->sc_nexus && flags & XS_CTL_POLL) 249 /* panic("siop_scsicmd: busy");*/ 250 printf("siop_scsicmd: busy\n"); 251 252 s = splbio(); 253 acb = sc->free_list.tqh_first; 254 if (acb) { 255 TAILQ_REMOVE(&sc->free_list, acb, chain); 256 } 257 splx(s); 258 259 #ifdef DIAGNOSTIC 260 /* 261 * This should never happen as we track the resources 262 * in the mid-layer. 263 */ 264 if (acb == NULL) { 265 scsipi_printaddr(periph); 266 printf("unable to allocate acb\n"); 267 panic("siop_scsipi_request"); 268 } 269 #endif 270 271 acb->flags = ACB_ACTIVE; 272 acb->xs = xs; 273 memcpy(&acb->cmd, xs->cmd, xs->cmdlen); 274 acb->clen = xs->cmdlen; 275 acb->daddr = xs->data; 276 acb->dleft = xs->datalen; 277 278 s = splbio(); 279 TAILQ_INSERT_TAIL(&sc->ready_list, acb, chain); 280 281 if (sc->sc_nexus == NULL) 282 siop_sched(sc); 283 284 splx(s); 285 286 if (flags & XS_CTL_POLL || siop_no_dma) 287 siop_poll(sc, acb); 288 return; 289 290 case ADAPTER_REQ_GROW_RESOURCES: 291 return; 292 293 case ADAPTER_REQ_SET_XFER_MODE: 294 return; 295 } 296 } 297 298 void 299 siop_poll(struct siop_softc *sc, struct siop_acb *acb) 300 { 301 siop_regmap_p rp = sc->sc_siopp; 302 struct scsipi_xfer *xs = acb->xs; 303 int i; 304 int status; 305 u_char istat; 306 u_char dstat; 307 u_char sstat0; 308 int s; 309 int to; 310 311 s = splbio(); 312 to = xs->timeout / 1000; 313 if (sc->nexus_list.tqh_first) 314 printf("%s: siop_poll called with disconnected device\n", 315 device_xname(sc->sc_dev)); 316 for (;;) { 317 /* use cmd_wait values? */ 318 i = 50000; 319 /* XXX spl0(); */ 320 while (((istat = rp->siop_istat) & 321 (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 322 if (--i <= 0) { 323 #ifdef DEBUG 324 printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %lx (+%lx) dcmd %lx ds %p timeout %d\n", 325 xs->xs_periph->periph_target, acb->cmd.opcode, 326 rp->siop_sbcl, rp->siop_dsp, 327 rp->siop_dsp - sc->sc_scriptspa, 328 *((volatile long *)&rp->siop_dcmd), &acb->ds, acb->xs->timeout); 329 #endif 330 i = 50000; 331 --to; 332 if (to <= 0) { 333 siopreset(sc); 334 return; 335 } 336 } 337 delay(20); 338 } 339 sstat0 = rp->siop_sstat0; 340 dstat = rp->siop_dstat; 341 if (siop_checkintr(sc, istat, dstat, sstat0, &status)) { 342 if (acb != sc->sc_nexus) 343 printf("%s: siop_poll disconnected device completed\n", 344 device_xname(sc->sc_dev)); 345 else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 346 sc->sc_flags &= ~SIOP_INTSOFF; 347 rp->siop_sien = sc->sc_sien; 348 rp->siop_dien = sc->sc_dien; 349 } 350 siop_scsidone(sc->sc_nexus, status); 351 } 352 353 if (xs->xs_status & XS_STS_DONE) 354 break; 355 } 356 splx(s); 357 } 358 359 /* 360 * start next command that's ready 361 */ 362 void 363 siop_sched(struct siop_softc *sc) 364 { 365 struct scsipi_periph *periph; 366 struct siop_acb *acb; 367 int i; 368 369 #ifdef DEBUG 370 if (sc->sc_nexus) { 371 printf("%s: siop_sched- nexus %p/%d ready %p/%d\n", 372 device_xname(sc->sc_dev), sc->sc_nexus, 373 sc->sc_nexus->xs->xs_periph->periph_target, 374 sc->ready_list.tqh_first, 375 sc->ready_list.tqh_first->xs->xs_periph->periph_target); 376 return; 377 } 378 #endif 379 for (acb = sc->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) { 380 periph = acb->xs->xs_periph; 381 i = periph->periph_target; 382 if(!(sc->sc_tinfo[i].lubusy & (1 << periph->periph_lun))) { 383 struct siop_tinfo *ti = &sc->sc_tinfo[i]; 384 385 TAILQ_REMOVE(&sc->ready_list, acb, chain); 386 sc->sc_nexus = acb; 387 periph = acb->xs->xs_periph; 388 ti = &sc->sc_tinfo[periph->periph_target]; 389 ti->lubusy |= (1 << periph->periph_lun); 390 break; 391 } 392 } 393 394 if (acb == NULL) { 395 #ifdef DEBUGXXX 396 printf("%s: siop_sched didn't find ready command\n", 397 device_xname(sc->sc_dev)); 398 #endif 399 return; 400 } 401 402 if (acb->xs->xs_control & XS_CTL_RESET) 403 siopreset(sc); 404 405 #if 0 406 acb->cmd.bytes[0] |= slp->scsipi_scsi.lun << 5; /* XXXX */ 407 #endif 408 ++sc->sc_active; 409 siop_select(sc); 410 } 411 412 void 413 siop_scsidone(struct siop_acb *acb, int stat) 414 { 415 struct scsipi_xfer *xs; 416 struct scsipi_periph *periph; 417 struct siop_softc *sc; 418 int dosched = 0; 419 420 if (acb == NULL || (xs = acb->xs) == NULL) { 421 #ifdef DIAGNOSTIC 422 printf("siop_scsidone: NULL acb or scsipi_xfer\n"); 423 #if defined(DEBUG) && defined(DDB) 424 Debugger(); 425 #endif 426 #endif 427 return; 428 } 429 430 callout_stop(&xs->xs_callout); 431 432 periph = xs->xs_periph; 433 sc = device_private(periph->periph_channel->chan_adapter->adapt_dev); 434 435 xs->status = stat; 436 xs->resid = 0; /* XXXX */ 437 438 if (xs->error == XS_NOERROR) { 439 if (stat == SCSI_CHECK || stat == SCSI_BUSY) 440 xs->error = XS_BUSY; 441 } 442 443 /* 444 * Remove the ACB from whatever queue it's on. We have to do a bit of 445 * a hack to figure out which queue it's on. Note that it is *not* 446 * necessary to cdr down the ready queue, but we must cdr down the 447 * nexus queue and see if it's there, so we can mark the unit as no 448 * longer busy. This code is sickening, but it works. 449 */ 450 if (acb == sc->sc_nexus) { 451 sc->sc_nexus = NULL; 452 sc->sc_tinfo[periph->periph_target].lubusy &= 453 ~(1<<periph->periph_lun); 454 if (sc->ready_list.tqh_first) 455 dosched = 1; /* start next command */ 456 --sc->sc_active; 457 SIOP_TRACE('d','a',stat,0) 458 } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) { 459 TAILQ_REMOVE(&sc->ready_list, acb, chain); 460 SIOP_TRACE('d','r',stat,0) 461 } else { 462 register struct siop_acb *acb2; 463 for (acb2 = sc->nexus_list.tqh_first; acb2; 464 acb2 = acb2->chain.tqe_next) 465 if (acb2 == acb) { 466 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 467 sc->sc_tinfo[periph->periph_target].lubusy 468 &= ~(1<<periph->periph_lun); 469 --sc->sc_active; 470 break; 471 } 472 if (acb2) 473 ; 474 else if (acb->chain.tqe_next) { 475 TAILQ_REMOVE(&sc->ready_list, acb, chain); 476 --sc->sc_active; 477 } else { 478 printf("%s: can't find matching acb\n", 479 device_xname(sc->sc_dev)); 480 #ifdef DDB 481 /* Debugger(); */ 482 #endif 483 } 484 SIOP_TRACE('d','n',stat,0); 485 } 486 /* Put it on the free list. */ 487 acb->flags = ACB_FREE; 488 TAILQ_INSERT_HEAD(&sc->free_list, acb, chain); 489 490 sc->sc_tinfo[periph->periph_target].cmds++; 491 492 scsipi_done(xs); 493 494 if (dosched && sc->sc_nexus == NULL) 495 siop_sched(sc); 496 } 497 498 void 499 siopabort(register struct siop_softc *sc, siop_regmap_p rp, const char *where) 500 { 501 #ifdef fix_this 502 int i; 503 #endif 504 505 printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n", 506 device_xname(sc->sc_dev), 507 where, rp->siop_dstat, rp->siop_sstat0, rp->siop_sbcl); 508 509 if (sc->sc_active > 0) { 510 #ifdef TODO 511 SET_SBIC_cmd (rp, SBIC_CMD_ABORT); 512 WAIT_CIP (rp); 513 514 GET_SBIC_asr (rp, asr); 515 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) 516 { 517 /* ok, get more drastic.. */ 518 519 SET_SBIC_cmd (rp, SBIC_CMD_RESET); 520 delay(25); 521 SBIC_WAIT(rp, SBIC_ASR_INT, 0); 522 GET_SBIC_csr (rp, csr); /* clears interrupt also */ 523 524 return; 525 } 526 527 do 528 { 529 SBIC_WAIT (rp, SBIC_ASR_INT, 0); 530 GET_SBIC_csr (rp, csr); 531 } 532 while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 533 && (csr != SBIC_CSR_CMD_INVALID)); 534 #endif 535 536 /* lets just hope it worked.. */ 537 #ifdef fix_this 538 for (i = 0; i < 2; ++i) { 539 if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] != 540 sc->sc_cur) { 541 printf ("siopabort: cleanup!\n"); 542 sc->sc_iob[i].sc_xs = NULL; 543 } 544 } 545 #endif /* fix_this */ 546 /* sc->sc_active = 0; */ 547 } 548 } 549 550 void 551 siopinitialize(struct siop_softc *sc) 552 { 553 int i; 554 u_int inhibit_sync; 555 extern u_long scsi_nosync; 556 extern int shift_nosync; 557 558 /* 559 * Need to check that scripts is on a long word boundary 560 * Also should verify that dev doesn't span non-contiguous 561 * physical pages. 562 */ 563 sc->sc_scriptspa = kvtop((void *)__UNCONST(scripts)); 564 565 /* 566 * malloc sc_acb to ensure that DS is on a long word boundary. 567 */ 568 569 sc->sc_acb = malloc(sizeof(struct siop_acb) * SIOP_NACB, 570 M_DEVBUF, M_NOWAIT); 571 if (sc->sc_acb == NULL) 572 panic("siopinitialize: ACB malloc failed!"); 573 574 sc->sc_tcp[1] = 1000 / sc->sc_clock_freq; 575 sc->sc_tcp[2] = 1500 / sc->sc_clock_freq; 576 sc->sc_tcp[3] = 2000 / sc->sc_clock_freq; 577 sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */ 578 if (sc->sc_minsync < 25) 579 sc->sc_minsync = 25; 580 if (sc->sc_clock_freq <= 25) { 581 sc->sc_dcntl |= 0x80; /* SCLK/1 */ 582 sc->sc_tcp[0] = sc->sc_tcp[1]; 583 } else if (sc->sc_clock_freq <= 37) { 584 sc->sc_dcntl |= 0x40; /* SCLK/1.5 */ 585 sc->sc_tcp[0] = sc->sc_tcp[2]; 586 } else if (sc->sc_clock_freq <= 50) { 587 sc->sc_dcntl |= 0x00; /* SCLK/2 */ 588 sc->sc_tcp[0] = sc->sc_tcp[3]; 589 } else { 590 sc->sc_dcntl |= 0xc0; /* SCLK/3 */ 591 sc->sc_tcp[0] = 3000 / sc->sc_clock_freq; 592 } 593 594 if (scsi_nosync) { 595 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff; 596 shift_nosync += 8; 597 #ifdef DEBUG 598 if (inhibit_sync) 599 printf("%s: Inhibiting synchronous transfer %02x\n", 600 device_xname(sc->sc_dev), inhibit_sync); 601 #endif 602 for (i = 0; i < 8; ++i) 603 if (inhibit_sync & (1 << i)) 604 siop_inhibit_sync[i] = 1; 605 } 606 607 siopreset (sc); 608 } 609 610 void 611 siop_timeout(void *arg) 612 { 613 struct siop_acb *acb; 614 struct scsipi_periph *periph; 615 struct siop_softc *sc; 616 int s; 617 618 acb = arg; 619 periph = acb->xs->xs_periph; 620 sc = device_private(periph->periph_channel->chan_adapter->adapt_dev); 621 scsipi_printaddr(periph); 622 printf("timed out\n"); 623 624 s = splbio(); 625 626 acb->xs->error = XS_TIMEOUT; 627 siopreset(sc); 628 629 splx(s); 630 } 631 632 void 633 siopreset(struct siop_softc *sc) 634 { 635 siop_regmap_p rp; 636 u_int i, s; 637 u_char dummy; 638 struct siop_acb *acb; 639 640 rp = sc->sc_siopp; 641 642 if (sc->sc_flags & SIOP_ALIVE) 643 siopabort(sc, rp, "reset"); 644 645 printf("%s: ", device_xname(sc->sc_dev)); /* XXXX */ 646 647 s = splbio(); 648 649 /* 650 * Reset the chip 651 * XXX - is this really needed? 652 */ 653 rp->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */ 654 rp->siop_istat |= SIOP_ISTAT_RST; /* reset chip */ 655 rp->siop_istat &= ~SIOP_ISTAT_RST; 656 /* 657 * Reset SCSI bus (do we really want this?) 658 */ 659 rp->siop_sien = 0; 660 rp->siop_scntl1 |= SIOP_SCNTL1_RST; 661 delay(1); 662 rp->siop_scntl1 &= ~SIOP_SCNTL1_RST; 663 664 /* 665 * Set up various chip parameters 666 */ 667 rp->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG; 668 rp->siop_scntl1 = SIOP_SCNTL1_ESR; 669 rp->siop_dcntl = sc->sc_dcntl; 670 rp->siop_dmode = 0x80; /* burst length = 4 */ 671 rp->siop_sien = 0x00; /* don't enable interrupts yet */ 672 rp->siop_dien = 0x00; /* don't enable interrupts yet */ 673 rp->siop_scid = 1 << sc->sc_channel.chan_id; 674 rp->siop_dwt = 0x00; 675 rp->siop_ctest0 |= SIOP_CTEST0_BTD | SIOP_CTEST0_EAN; 676 rp->siop_ctest7 |= sc->sc_ctest7; 677 678 /* will need to re-negotiate sync xfers */ 679 memset(&sc->sc_sync, 0, sizeof (sc->sc_sync)); 680 681 i = rp->siop_istat; 682 if (i & SIOP_ISTAT_SIP) 683 dummy = rp->siop_sstat0; 684 if (i & SIOP_ISTAT_DIP) 685 dummy = rp->siop_dstat; 686 687 __USE(dummy); 688 splx (s); 689 690 delay (siop_reset_delay * 1000); 691 printf("siop id %d reset V%d\n", sc->sc_channel.chan_id, 692 rp->siop_ctest8 >> 4); 693 694 if ((sc->sc_flags & SIOP_ALIVE) == 0) { 695 TAILQ_INIT(&sc->ready_list); 696 TAILQ_INIT(&sc->nexus_list); 697 TAILQ_INIT(&sc->free_list); 698 sc->sc_nexus = NULL; 699 acb = sc->sc_acb; 700 memset(acb, 0, sizeof(struct siop_acb) * SIOP_NACB); 701 for (i = 0; i < SIOP_NACB; i++) { 702 TAILQ_INSERT_TAIL(&sc->free_list, acb, chain); 703 acb++; 704 } 705 memset(sc->sc_tinfo, 0, sizeof(sc->sc_tinfo)); 706 } else { 707 if (sc->sc_nexus != NULL) { 708 sc->sc_nexus->xs->error = XS_RESET; 709 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 710 } 711 while ((acb = sc->nexus_list.tqh_first) > 0) { 712 acb->xs->error = XS_RESET; 713 siop_scsidone(acb, acb->stat[0]); 714 } 715 } 716 717 sc->sc_flags |= SIOP_ALIVE; 718 sc->sc_flags &= ~(SIOP_INTDEFER|SIOP_INTSOFF); 719 /* enable SCSI and DMA interrupts */ 720 sc->sc_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE | 721 SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR; 722 sc->sc_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR | 723 /*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID; 724 rp->siop_sien = sc->sc_sien; 725 rp->siop_dien = sc->sc_dien; 726 } 727 728 /* 729 * Setup Data Storage for 53C710 and start SCRIPTS processing 730 */ 731 732 void 733 siop_start(struct siop_softc *sc, int target, int lun, u_char *cbuf, int clen, 734 u_char *buf, int len) 735 { 736 siop_regmap_p rp = sc->sc_siopp; 737 int nchain; 738 int count, tcount; 739 char *addr, *dmaend; 740 struct siop_acb *acb = sc->sc_nexus; 741 #ifdef DEBUG 742 int i; 743 #endif 744 745 #ifdef DEBUG 746 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 747 printf ("ACK! siop was busy: rp %p script %p dsa %p active %ld\n", 748 rp, &scripts, &acb->ds, sc->sc_active); 749 printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n", 750 rp->siop_istat, rp->siop_sfbr, rp->siop_lcrc, 751 rp->siop_sien, rp->siop_dien); 752 #ifdef DDB 753 /*Debugger();*/ 754 #endif 755 } 756 #endif 757 acb->msgout[0] = MSG_IDENTIFY | lun; 758 if (siop_allow_disc[target] & 2 || 759 (siop_allow_disc[target] && len == 0)) 760 acb->msgout[0] = MSG_IDENTIFY_DR | lun; 761 acb->status = 0; 762 acb->stat[0] = -1; 763 acb->msg[0] = -1; 764 acb->ds.scsi_addr = (0x10000 << target) | (sc->sc_sync[target].sxfer << 8); 765 acb->ds.idlen = 1; 766 acb->ds.idbuf = (char *) kvtop(&acb->msgout[0]); 767 acb->ds.cmdlen = clen; 768 acb->ds.cmdbuf = (char *) kvtop(cbuf); 769 acb->ds.stslen = 1; 770 acb->ds.stsbuf = (char *) kvtop(&acb->stat[0]); 771 acb->ds.msglen = 1; 772 acb->ds.msgbuf = (char *) kvtop(&acb->msg[0]); 773 acb->msg[1] = -1; 774 acb->ds.msginlen = 1; 775 acb->ds.extmsglen = 1; 776 acb->ds.synmsglen = 3; 777 acb->ds.msginbuf = (char *) kvtop(&acb->msg[1]); 778 acb->ds.extmsgbuf = (char *) kvtop(&acb->msg[2]); 779 acb->ds.synmsgbuf = (char *) kvtop(&acb->msg[3]); 780 memset(&acb->ds.chain, 0, sizeof (acb->ds.chain)); 781 782 /* 783 * Negotiate wide is the initial negotiation state; since the 53c710 784 * doesn't do wide transfers, just begin the synchronous transfer 785 * negotation here. 786 */ 787 if (sc->sc_sync[target].state == NEG_WIDE) { 788 if (siop_inhibit_sync[target]) { 789 sc->sc_sync[target].state = NEG_DONE; 790 sc->sc_sync[target].sbcl = 0; 791 sc->sc_sync[target].sxfer = 0; 792 #ifdef DEBUG 793 if (siopsync_debug) 794 printf ("Forcing target %d asynchronous\n", target); 795 #endif 796 } 797 else { 798 acb->msg[2] = -1; 799 acb->msgout[1] = MSG_EXT_MESSAGE; 800 acb->msgout[2] = 3; 801 acb->msgout[3] = MSG_SYNC_REQ; 802 #ifdef MAXTOR_SYNC_KLUDGE 803 acb->msgout[4] = 50 / 4; /* ask for ridiculous period */ 804 #else 805 acb->msgout[4] = sc->sc_minsync; 806 #endif 807 acb->msgout[5] = SIOP_MAX_OFFSET; 808 acb->ds.idlen = 6; 809 sc->sc_sync[target].state = NEG_WAITS; 810 #ifdef DEBUG 811 if (siopsync_debug) 812 printf ("Sending sync request to target %d\n", target); 813 #endif 814 } 815 } 816 817 /* 818 * Build physical DMA addresses for scatter/gather I/O 819 */ 820 acb->iob_buf = buf; 821 acb->iob_len = len; 822 acb->iob_curbuf = acb->iob_curlen = 0; 823 nchain = 0; 824 count = len; 825 addr = buf; 826 dmaend = NULL; 827 while (count > 0) { 828 acb->ds.chain[nchain].databuf = (char *) kvtop (addr); 829 if (count < (tcount = PAGE_SIZE - ((int) addr & PGOFSET))) 830 tcount = count; 831 acb->ds.chain[nchain].datalen = tcount; 832 addr += tcount; 833 count -= tcount; 834 if (acb->ds.chain[nchain].databuf == dmaend) { 835 dmaend += acb->ds.chain[nchain].datalen; 836 acb->ds.chain[nchain].datalen = 0; 837 acb->ds.chain[--nchain].datalen += tcount; 838 #ifdef DEBUG 839 ++siopdma_hits; 840 #endif 841 } 842 else { 843 dmaend = acb->ds.chain[nchain].databuf + 844 acb->ds.chain[nchain].datalen; 845 acb->ds.chain[nchain].datalen = tcount; 846 #ifdef DEBUG 847 if (nchain) /* Don't count miss on first one */ 848 ++siopdma_misses; 849 #endif 850 } 851 ++nchain; 852 } 853 #ifdef DEBUG 854 if (nchain != 1 && len != 0 && siop_debug & 3) { 855 printf ("DMA chaining set: %d\n", nchain); 856 for (i = 0; i < nchain; ++i) { 857 printf (" [%d] %8p %lx\n", i, acb->ds.chain[i].databuf, 858 acb->ds.chain[i].datalen); 859 } 860 } 861 #endif 862 863 /* push data cache for all data the 53c710 needs to access */ 864 dma_cachectl ((void *)acb, sizeof (struct siop_acb)); 865 dma_cachectl (cbuf, clen); 866 if (buf != NULL && len != 0) 867 dma_cachectl (buf, len); 868 #ifdef DEBUG 869 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 870 printf ("ACK! siop was busy at start: rp %p script %p dsa %p active %ld\n", 871 rp, &scripts, &acb->ds, sc->sc_active); 872 #ifdef DDB 873 /*Debugger();*/ 874 #endif 875 } 876 #endif 877 if (sc->nexus_list.tqh_first == NULL) { 878 callout_reset(&acb->xs->xs_callout, 879 mstohz(acb->xs->timeout) + 1, siop_timeout, acb); 880 if (rp->siop_istat & SIOP_ISTAT_CON) 881 printf("%s: siop_select while connected?\n", 882 device_xname(sc->sc_dev)); 883 rp->siop_temp = 0; 884 rp->siop_sbcl = sc->sc_sync[target].sbcl; 885 rp->siop_dsa = kvtop((void *)&acb->ds); 886 rp->siop_dsp = sc->sc_scriptspa; 887 SIOP_TRACE('s',1,0,0) 888 } else { 889 if ((rp->siop_istat & SIOP_ISTAT_CON) == 0) { 890 rp->siop_istat = SIOP_ISTAT_SIGP; 891 SIOP_TRACE('s',2,0,0); 892 } 893 else { 894 SIOP_TRACE('s',3,rp->siop_istat,0); 895 } 896 } 897 #ifdef DEBUG 898 ++siopstarts; 899 #endif 900 } 901 902 /* 903 * Process a DMA or SCSI interrupt from the 53C710 SIOP 904 */ 905 906 int 907 siop_checkintr(struct siop_softc *sc, u_char istat, u_char dstat, 908 u_char sstat0, int *status) 909 { 910 siop_regmap_p rp = sc->sc_siopp; 911 struct siop_acb *acb = sc->sc_nexus; 912 int target = 0; 913 int dfifo, dbc, sstat1; 914 915 dfifo = rp->siop_dfifo; 916 dbc = rp->siop_dbc0; 917 sstat1 = rp->siop_sstat1; 918 rp->siop_ctest8 |= SIOP_CTEST8_CLF; 919 while ((rp->siop_ctest1 & SIOP_CTEST1_FMT) != SIOP_CTEST1_FMT) 920 ; 921 rp->siop_ctest8 &= ~SIOP_CTEST8_CLF; 922 #ifdef DEBUG 923 ++siopints; 924 #if 0 925 if (siop_debug & 0x100) { 926 DCIAS(&acb->stat[0]); /* XXX */ 927 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 928 istat, dstat, sstat0, rp->siop_dsps, rp->siop_sbcl, acb->stat[0], acb->msg[0]); 929 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 930 acb->msg[0], acb->msg[1], acb->msg[2], 931 acb->msg[3], acb->msg[4], acb->msg[5]); 932 } 933 #endif 934 if (rp->siop_dsp && (rp->siop_dsp < sc->sc_scriptspa || 935 rp->siop_dsp >= sc->sc_scriptspa + sizeof(scripts))) { 936 printf ("%s: dsp not within script dsp %lx scripts %lx:%lx", 937 device_xname(sc->sc_dev), rp->siop_dsp, sc->sc_scriptspa, 938 sc->sc_scriptspa + sizeof(scripts)); 939 printf(" istat %x dstat %x sstat0 %x\n", 940 istat, dstat, sstat0); 941 #ifdef DDB 942 Debugger(); 943 #endif 944 } 945 #endif 946 SIOP_TRACE('i',dstat,istat,(istat&SIOP_ISTAT_DIP)?rp->siop_dsps&0xff:sstat0); 947 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff00) { 948 /* Normal completion status, or check condition */ 949 #ifdef DEBUG 950 if (rp->siop_dsa != kvtop((void *)&acb->ds)) { 951 printf ("siop: invalid dsa: %lx %x\n", rp->siop_dsa, 952 (unsigned)kvtop((void *)&acb->ds)); 953 panic("*** siop DSA invalid ***"); 954 } 955 #endif 956 target = acb->xs->xs_periph->periph_target; 957 if (sc->sc_sync[target].state == NEG_WAITS) { 958 if (acb->msg[1] == 0xff) 959 printf ("%s: target %d ignored sync request\n", 960 device_xname(sc->sc_dev), target); 961 else if (acb->msg[1] == MSG_REJECT) 962 printf ("%s: target %d rejected sync request\n", 963 device_xname(sc->sc_dev), target); 964 else 965 /* XXX - need to set sync transfer parameters */ 966 printf("%s: target %d (sync) %02x %02x %02x\n", 967 device_xname(sc->sc_dev), target, acb->msg[1], 968 acb->msg[2], acb->msg[3]); 969 sc->sc_sync[target].state = NEG_DONE; 970 } 971 dma_cachectl(&acb->stat[0], 1); 972 *status = acb->stat[0]; 973 #ifdef DEBUG 974 if (rp->siop_sbcl & SIOP_BSY) { 975 /*printf ("ACK! siop was busy at end: rp %x script %x dsa %x\n", 976 rp, &scripts, &acb->ds);*/ 977 #ifdef DDB 978 /*Debugger();*/ 979 #endif 980 } 981 if (acb->msg[0] != 0x00) 982 printf("%s: message was not COMMAND COMPLETE: %x\n", 983 device_xname(sc->sc_dev), acb->msg[0]); 984 #endif 985 if (sc->nexus_list.tqh_first) 986 rp->siop_dcntl |= SIOP_DCNTL_STD; 987 return 1; 988 } 989 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0b) { 990 target = acb->xs->xs_periph->periph_target; 991 if (acb->msg[1] == MSG_EXT_MESSAGE && acb->msg[2] == 3 && 992 acb->msg[3] == MSG_SYNC_REQ) { 993 #ifdef DEBUG 994 if (siopsync_debug) 995 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 996 acb->msg[0], acb->msg[1], acb->msg[2], 997 acb->msg[3], acb->msg[4], acb->msg[5]); 998 #endif 999 sc->sc_sync[target].sxfer = 0; 1000 sc->sc_sync[target].sbcl = 0; 1001 if (acb->msg[2] == 3 && 1002 acb->msg[3] == MSG_SYNC_REQ && 1003 acb->msg[5] != 0) { 1004 #ifdef MAXTOR_KLUDGE 1005 /* 1006 * Kludge for my Maxtor XT8580S 1007 * It accepts whatever we request, even 1008 * though it won't work. So we ask for 1009 * a short period than we can handle. If 1010 * the device says it can do it, use 208ns. 1011 * If the device says it can do less than 1012 * 100ns, then we limit it to 100ns. 1013 */ 1014 if (acb->msg[4] && acb->msg[4] < 100 / 4) { 1015 #ifdef DEBUG 1016 printf ("%d: target %d wanted %dns period\n", 1017 device_xname(sc->sc_dev), target, 1018 acb->msg[4] * 4); 1019 #endif 1020 if (acb->msg[4] == 50 / 4) 1021 acb->msg[4] = 208 / 4; 1022 else 1023 acb->msg[4] = 100 / 4; 1024 } 1025 #endif /* MAXTOR_KLUDGE */ 1026 printf ("%s: target %d now synchronous, period=%dns, offset=%d\n", 1027 device_xname(sc->sc_dev), target, 1028 acb->msg[4] * 4, acb->msg[5]); 1029 scsi_period_to_siop (sc, target); 1030 } 1031 rp->siop_sxfer = sc->sc_sync[target].sxfer; 1032 rp->siop_sbcl = sc->sc_sync[target].sbcl; 1033 if (sc->sc_sync[target].state == NEG_WAITS) { 1034 sc->sc_sync[target].state = NEG_DONE; 1035 rp->siop_dsp = sc->sc_scriptspa + Ent_clear_ack; 1036 return(0); 1037 } 1038 rp->siop_dcntl |= SIOP_DCNTL_STD; 1039 sc->sc_sync[target].state = NEG_DONE; 1040 return (0); 1041 } 1042 /* XXX - not SDTR message */ 1043 } 1044 if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */ 1045 #ifdef DEBUG 1046 ++siopphmm; 1047 if (acb == NULL) 1048 printf("%s: Phase mismatch with no active command?\n", 1049 device_xname(sc->sc_dev)); 1050 #endif 1051 if (acb->iob_len) { 1052 int adjust; 1053 adjust = ((dfifo - (dbc & 0x7f)) & 0x7f); 1054 if (sstat1 & SIOP_SSTAT1_ORF) 1055 ++adjust; 1056 if (sstat1 & SIOP_SSTAT1_OLF) 1057 ++adjust; 1058 acb->iob_curlen = 1059 *((long *)__UNVOLATILE(&rp->siop_dcmd)) & 0xffffff; 1060 acb->iob_curlen += adjust; 1061 acb->iob_curbuf = 1062 *((long *)__UNVOLATILE(&rp->siop_dnad)) - adjust; 1063 #ifdef DEBUG 1064 if (siop_debug & 0x100) { 1065 int i; 1066 printf ("Phase mismatch: curbuf %lx curlen %lx dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %p\n", 1067 acb->iob_curbuf, acb->iob_curlen, dfifo, 1068 dbc, sstat1, adjust, rp->siop_sbcl, 1069 siopstarts, acb); 1070 if (acb->ds.chain[1].datalen) { 1071 for (i = 0; acb->ds.chain[i].datalen; ++i) 1072 printf("chain[%d] addr %p len %lx\n", 1073 i, acb->ds.chain[i].databuf, 1074 acb->ds.chain[i].datalen); 1075 } 1076 } 1077 #endif 1078 dma_cachectl ((void *)acb, sizeof(*acb)); 1079 } 1080 #ifdef DEBUG 1081 SIOP_TRACE('m',rp->siop_sbcl,(rp->siop_dsp>>8),rp->siop_dsp); 1082 if (siop_debug & 9) 1083 printf ("Phase mismatch: %x dsp +%lx dcmd %lx\n", 1084 rp->siop_sbcl, 1085 rp->siop_dsp - sc->sc_scriptspa, 1086 *((volatile long *)&rp->siop_dcmd)); 1087 #endif 1088 if ((rp->siop_sbcl & SIOP_REQ) == 0) { 1089 printf ("Phase mismatch: REQ not asserted! %02x dsp %lx\n", 1090 rp->siop_sbcl, rp->siop_dsp); 1091 #if defined(DEBUG) && defined(DDB) 1092 /*Debugger(); XXX is*/ 1093 #endif 1094 } 1095 switch (rp->siop_sbcl & 7) { 1096 case 0: /* data out */ 1097 case 1: /* data in */ 1098 case 2: /* status */ 1099 case 3: /* command */ 1100 case 6: /* message in */ 1101 case 7: /* message out */ 1102 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1103 break; 1104 default: 1105 goto bad_phase; 1106 } 1107 return 0; 1108 } 1109 if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */ 1110 #ifdef DEBUG 1111 if (acb == NULL) 1112 printf("%s: Select timeout with no active command?\n", 1113 device_xname(sc->sc_dev)); 1114 if (rp->siop_sbcl & SIOP_BSY) { 1115 printf ("ACK! siop was busy at timeout: rp %p script %p dsa %p\n", 1116 rp, &scripts, &acb->ds); 1117 printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n", 1118 rp->siop_sbcl, rp->siop_sdid, istat, dstat, sstat0); 1119 if (!(rp->siop_sbcl & SIOP_BSY)) { 1120 printf ("Yikes, it's not busy now!\n"); 1121 #if 0 1122 *status = -1; 1123 if (sc->nexus_list.tqh_first) 1124 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1125 return 1; 1126 #endif 1127 } 1128 /* rp->siop_dcntl |= SIOP_DCNTL_STD;*/ 1129 return (0); 1130 #ifdef DDB 1131 Debugger(); 1132 #endif 1133 } 1134 #endif 1135 *status = -1; 1136 acb->xs->error = XS_SELTIMEOUT; 1137 if (sc->nexus_list.tqh_first) 1138 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1139 return 1; 1140 } 1141 if (acb) 1142 target = acb->xs->xs_periph->periph_target; 1143 else 1144 target = 7; 1145 if (sstat0 & SIOP_SSTAT0_UDC) { 1146 #ifdef DEBUG 1147 if (acb == NULL) 1148 printf("%s: Unexpected disconnect with no active command?\n", 1149 device_xname(sc->sc_dev)); 1150 printf ("%s: target %d disconnected unexpectedly\n", 1151 device_xname(sc->sc_dev), target); 1152 #endif 1153 #if 0 1154 siopabort (sc, rp, "siopchkintr"); 1155 #endif 1156 *status = STS_BUSY; 1157 if (sc->nexus_list.tqh_first) 1158 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1159 return (acb != NULL); 1160 } 1161 if (dstat & SIOP_DSTAT_SIR && (rp->siop_dsps == 0xff01 || 1162 rp->siop_dsps == 0xff02)) { 1163 #ifdef DEBUG 1164 if (siop_debug & 0x100) 1165 printf ("%s: ID %02x disconnected TEMP %lx (+%lx) curbuf %lx curlen %lx buf %p len %lx dfifo %x dbc %x sstat1 %x starts %d acb %p\n", 1166 device_xname(sc->sc_dev), 1 << target, rp->siop_temp, 1167 rp->siop_temp ? rp->siop_temp - sc->sc_scriptspa : 0, 1168 acb->iob_curbuf, acb->iob_curlen, 1169 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, siopstarts, acb); 1170 #endif 1171 if (acb == NULL) { 1172 printf("%s: Disconnect with no active command?\n", 1173 device_xname(sc->sc_dev)); 1174 return (0); 1175 } 1176 /* 1177 * XXXX need to update iob_curbuf/iob_curlen to reflect 1178 * current data transferred. If device disconnected in 1179 * the middle of a DMA block, they should already be set 1180 * by the phase change interrupt. If the disconnect 1181 * occurs on a DMA block boundary, we have to figure out 1182 * which DMA block it was. 1183 */ 1184 if (acb->iob_len && rp->siop_temp) { 1185 int n = rp->siop_temp - sc->sc_scriptspa; 1186 1187 if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen) 1188 printf("%s: iob_curbuf/len already set? n %x iob %lx/%lx chain[0] %p/%lx\n", 1189 device_xname(sc->sc_dev), n, acb->iob_curbuf, acb->iob_curlen, 1190 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen); 1191 if (n < Ent_datain) 1192 n = (n - Ent_dataout) / 16; 1193 else 1194 n = (n - Ent_datain) / 16; 1195 if (n <= 0 && n > DMAMAXIO) 1196 printf("TEMP invalid %d\n", n); 1197 else { 1198 acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf; 1199 acb->iob_curlen = acb->ds.chain[n].datalen; 1200 } 1201 #ifdef DEBUG 1202 if (siop_debug & 0x100) { 1203 printf("%s: TEMP offset %d", device_xname(sc->sc_dev), n); 1204 printf(" curbuf %lx curlen %lx\n", acb->iob_curbuf, 1205 acb->iob_curlen); 1206 } 1207 #endif 1208 } 1209 /* 1210 * If data transfer was interrupted by disconnect, iob_curbuf 1211 * and iob_curlen should reflect the point of interruption. 1212 * Adjust the DMA chain so that the data transfer begins 1213 * at the appropriate place upon reselection. 1214 * XXX This should only be done on save data pointer message? 1215 */ 1216 if (acb->iob_curlen) { 1217 int i, j; 1218 1219 #ifdef DEBUG 1220 if (siop_debug & 0x100) 1221 printf ("%s: adjusting DMA chain\n", 1222 device_xname(sc->sc_dev)); 1223 if (rp->siop_dsps == 0xff02) 1224 printf ("%s: ID %02x disconnected without Save Data Pointers\n", 1225 device_xname(sc->sc_dev), 1 << target); 1226 #endif 1227 /* XXX is: if (rp->siop_dsps != 0xff02) { */ 1228 /* not disconnected without save data ptr */ 1229 for (i = 0; i < DMAMAXIO; ++i) { 1230 if (acb->ds.chain[i].datalen == 0) 1231 break; 1232 if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf && 1233 acb->iob_curbuf < (long)(acb->ds.chain[i].databuf + 1234 acb->ds.chain[i].datalen)) 1235 break; 1236 } 1237 if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0) { 1238 printf("couldn't find saved data pointer: "); 1239 printf("curbuf %lx curlen %lx i %d\n", 1240 acb->iob_curbuf, acb->iob_curlen, i); 1241 #ifdef DDB 1242 Debugger(); 1243 #endif 1244 } 1245 /* XXX is: } */ 1246 #ifdef DEBUG 1247 if (siop_debug & 0x100) 1248 printf(" chain[0]: %p/%lx -> %lx/%lx\n", 1249 acb->ds.chain[0].databuf, 1250 acb->ds.chain[0].datalen, 1251 acb->iob_curbuf, 1252 acb->iob_curlen); 1253 #endif 1254 acb->ds.chain[0].databuf = (char *)acb->iob_curbuf; 1255 acb->ds.chain[0].datalen = acb->iob_curlen; 1256 for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) { 1257 #ifdef DEBUG 1258 if (siop_debug & 0x100) 1259 printf(" chain[%d]: %p/%lx -> %p/%lx\n", j, 1260 acb->ds.chain[j].databuf, 1261 acb->ds.chain[j].datalen, 1262 acb->ds.chain[i].databuf, 1263 acb->ds.chain[i].datalen); 1264 #endif 1265 acb->ds.chain[j].databuf = acb->ds.chain[i].databuf; 1266 acb->ds.chain[j].datalen = acb->ds.chain[i].datalen; 1267 } 1268 if (j < DMAMAXIO) 1269 acb->ds.chain[j].datalen = 0; 1270 DCIAS(kvtop((void *)&acb->ds.chain)); 1271 } 1272 ++sc->sc_tinfo[target].dconns; 1273 /* 1274 * add nexus to waiting list 1275 * clear nexus 1276 * try to start another command for another target/lun 1277 */ 1278 acb->status = sc->sc_flags & SIOP_INTSOFF; 1279 TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain); 1280 sc->sc_nexus = NULL; /* no current device */ 1281 /* start script to wait for reselect */ 1282 if (sc->sc_nexus == NULL) 1283 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1284 /* XXXX start another command ? */ 1285 if (sc->ready_list.tqh_first) 1286 siop_sched(sc); 1287 return (0); 1288 } 1289 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff03) { 1290 int reselid = rp->siop_scratch & 0x7f; 1291 int reselun = rp->siop_sfbr & 0x07; 1292 1293 sc->sc_sstat1 = rp->siop_sbcl; /* XXXX save current SBCL */ 1294 #ifdef DEBUG 1295 if (siop_debug & 0x100) 1296 printf ("%s: target ID %02x reselected dsps %lx\n", 1297 device_xname(sc->sc_dev), reselid, 1298 rp->siop_dsps); 1299 if ((rp->siop_sfbr & 0x80) == 0) 1300 printf("%s: Reselect message in was not identify: %x\n", 1301 device_xname(sc->sc_dev), rp->siop_sfbr); 1302 #endif 1303 if (sc->sc_nexus) { 1304 #ifdef DEBUG 1305 if (siop_debug & 0x100) 1306 printf ("%s: reselect ID %02x w/active\n", 1307 device_xname(sc->sc_dev), reselid); 1308 #endif 1309 TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain); 1310 sc->sc_tinfo[sc->sc_nexus->xs->xs_periph->periph_target].lubusy 1311 &= ~(1 << sc->sc_nexus->xs->xs_periph->periph_lun); 1312 --sc->sc_active; 1313 } 1314 /* 1315 * locate acb of reselecting device 1316 * set sc->sc_nexus to acb 1317 */ 1318 for (acb = sc->nexus_list.tqh_first; acb; 1319 acb = acb->chain.tqe_next) { 1320 if (reselid != (acb->ds.scsi_addr >> 16) || 1321 reselun != (acb->msgout[0] & 0x07)) 1322 continue; 1323 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 1324 sc->sc_nexus = acb; 1325 sc->sc_flags |= acb->status; 1326 acb->status = 0; 1327 DCIAS(kvtop(&acb->stat[0])); 1328 rp->siop_dsa = kvtop((void *)&acb->ds); 1329 rp->siop_sxfer = 1330 sc->sc_sync[acb->xs->xs_periph->periph_target].sxfer; 1331 rp->siop_sbcl = 1332 sc->sc_sync[acb->xs->xs_periph->periph_target].sbcl; 1333 break; 1334 } 1335 if (acb == NULL) { 1336 printf("%s: target ID %02x reselect nexus_list %p\n", 1337 device_xname(sc->sc_dev), reselid, 1338 sc->nexus_list.tqh_first); 1339 panic("unable to find reselecting device"); 1340 } 1341 dma_cachectl ((void *)acb, sizeof(*acb)); 1342 rp->siop_temp = 0; 1343 rp->siop_dcntl |= SIOP_DCNTL_STD; 1344 return (0); 1345 } 1346 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff04) { 1347 #ifdef DEBUG 1348 u_short ctest2 = rp->siop_ctest2; 1349 1350 /* reselect was interrupted (by Sig_P or select) */ 1351 if (siop_debug & 0x100 || 1352 (ctest2 & SIOP_CTEST2_SIGP) == 0) 1353 printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x istat %x/%x\n", 1354 device_xname(sc->sc_dev), rp->siop_scntl1, 1355 ctest2, rp->siop_sfbr, istat, rp->siop_istat); 1356 #endif 1357 /* XXX assumes it was not select */ 1358 if (sc->sc_nexus == NULL) { 1359 #ifdef DEBUG 1360 printf("%s: reselect interrupted, sc_nexus == NULL\n", 1361 device_xname(sc->sc_dev)); 1362 #if 0 1363 siop_dump(sc); 1364 #ifdef DDB 1365 Debugger(); 1366 #endif 1367 #endif 1368 #endif 1369 rp->siop_dcntl |= SIOP_DCNTL_STD; 1370 return(0); 1371 } 1372 target = sc->sc_nexus->xs->xs_periph->periph_target; 1373 rp->siop_temp = 0; 1374 rp->siop_dsa = kvtop((void *)&sc->sc_nexus->ds); 1375 rp->siop_sxfer = sc->sc_sync[target].sxfer; 1376 rp->siop_sbcl = sc->sc_sync[target].sbcl; 1377 rp->siop_dsp = sc->sc_scriptspa; 1378 return (0); 1379 } 1380 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff06) { 1381 if (acb == NULL) 1382 printf("%s: Bad message-in with no active command?\n", 1383 device_xname(sc->sc_dev)); 1384 /* Unrecognized message in byte */ 1385 dma_cachectl (&acb->msg[1],1); 1386 printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n", 1387 device_xname(sc->sc_dev), rp->siop_sfbr, acb->msg[1], rp->siop_sbcl); 1388 /* what should be done here? */ 1389 DCIAS(kvtop(&acb->msg[1])); 1390 rp->siop_dsp = sc->sc_scriptspa + Ent_clear_ack; 1391 return (0); 1392 } 1393 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0a) { 1394 /* Status phase wasn't followed by message in phase? */ 1395 printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n", 1396 device_xname(sc->sc_dev), rp->siop_sbcl, rp->siop_sbdl); 1397 if (rp->siop_sbcl == 0xa7) { 1398 /* It is now, just continue the script? */ 1399 rp->siop_dcntl |= SIOP_DCNTL_STD; 1400 return (0); 1401 } 1402 } 1403 if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) { 1404 dma_cachectl (&acb->stat[0], 1); 1405 dma_cachectl (&acb->msg[0], 1); 1406 printf ("SIOP interrupt: %lx sts %x msg %x %x sbcl %x\n", 1407 rp->siop_dsps, acb->stat[0], acb->msg[0], acb->msg[1], 1408 rp->siop_sbcl); 1409 siopreset (sc); 1410 *status = -1; 1411 return 0; /* siopreset has cleaned up */ 1412 } 1413 if (sstat0 & SIOP_SSTAT0_SGE) 1414 printf ("SIOP: SCSI Gross Error\n"); 1415 if (sstat0 & SIOP_SSTAT0_PAR) 1416 printf ("SIOP: Parity Error\n"); 1417 if (dstat & SIOP_DSTAT_IID) 1418 printf ("SIOP: Invalid instruction detected\n"); 1419 bad_phase: 1420 /* 1421 * temporary panic for unhandled conditions 1422 * displays various things about the 53C710 status and registers 1423 * then panics. 1424 * XXXX need to clean this up to print out the info, reset, and continue 1425 */ 1426 printf ("siopchkintr: target %x ds %p\n", target, &acb->ds); 1427 printf ("scripts %lx ds %x rp %x dsp %lx dcmd %lx\n", 1428 sc->sc_scriptspa, (unsigned)kvtop((void *)&acb->ds), 1429 (unsigned)kvtop((void *)__UNVOLATILE(rp)), rp->siop_dsp, 1430 *((volatile long *)&rp->siop_dcmd)); 1431 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %lx dsa %lx sbcl %x sts %x msg %x %x sfbr %x\n", 1432 istat, dstat, sstat0, rp->siop_dsps, rp->siop_dsa, 1433 rp->siop_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->siop_sfbr); 1434 #ifdef DEBUG 1435 if (siop_debug & 0x20) 1436 panic("siopchkintr: **** temp ****"); 1437 #endif 1438 #ifdef DDB 1439 Debugger (); 1440 #endif 1441 siopreset (sc); /* hard reset */ 1442 *status = -1; 1443 return 0; /* siopreset cleaned up */ 1444 } 1445 1446 void 1447 siop_select(struct siop_softc *sc) 1448 { 1449 siop_regmap_p rp; 1450 struct siop_acb *acb = sc->sc_nexus; 1451 1452 #ifdef DEBUG 1453 if (siop_debug & 1) 1454 printf ("%s: select ", device_xname(sc->sc_dev)); 1455 #endif 1456 1457 rp = sc->sc_siopp; 1458 if (acb->xs->xs_control & XS_CTL_POLL || siop_no_dma) { 1459 sc->sc_flags |= SIOP_INTSOFF; 1460 sc->sc_flags &= ~SIOP_INTDEFER; 1461 if ((rp->siop_istat & 0x08) == 0) { 1462 rp->siop_sien = 0; 1463 rp->siop_dien = 0; 1464 } 1465 #if 0 1466 } else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 1467 sc->sc_flags &= ~SIOP_INTSOFF; 1468 if ((rp->siop_istat & 0x08) == 0) { 1469 rp->siop_sien = sc->sc_sien; 1470 rp->siop_dien = sc->sc_dien; 1471 } 1472 #endif 1473 } 1474 #ifdef DEBUG 1475 if (siop_debug & 1) 1476 printf ("siop_select: target %x cmd %02x ds %p\n", 1477 acb->xs->xs_periph->periph_target, acb->cmd.opcode, 1478 &sc->sc_nexus->ds); 1479 #endif 1480 1481 siop_start(sc, acb->xs->xs_periph->periph_target, 1482 acb->xs->xs_periph->periph_lun, 1483 (u_char *)&acb->cmd, acb->clen, acb->daddr, acb->dleft); 1484 1485 return; 1486 } 1487 1488 /* 1489 * 53C710 interrupt handler 1490 */ 1491 1492 void 1493 siopintr(register struct siop_softc *sc) 1494 { 1495 siop_regmap_p rp; 1496 register u_char istat, dstat, sstat0; 1497 int status; 1498 int s = splbio(); 1499 1500 istat = sc->sc_istat; 1501 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 1502 splx(s); 1503 return; 1504 } 1505 1506 /* Got a valid interrupt on this device */ 1507 rp = sc->sc_siopp; 1508 dstat = sc->sc_dstat; 1509 sstat0 = sc->sc_sstat0; 1510 if (dstat & SIOP_DSTAT_SIR) 1511 sc->sc_intcode = rp->siop_dsps; 1512 sc->sc_istat = 0; 1513 #ifdef DEBUG 1514 if (siop_debug & 1) 1515 printf ("%s: intr istat %x dstat %x sstat0 %x\n", 1516 device_xname(sc->sc_dev), istat, dstat, sstat0); 1517 if (!sc->sc_active) { 1518 printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x nexus %p status %x\n", 1519 device_xname(sc->sc_dev), istat, dstat, sstat0, 1520 sc->sc_nexus, sc->sc_nexus ? sc->sc_nexus->stat[0] : 0); 1521 } 1522 #endif 1523 1524 #ifdef DEBUG 1525 if (siop_debug & 5) { 1526 DCIAS(kvtop(&sc->sc_nexus->stat[0])); 1527 printf ("%s: intr istat %x dstat %x sstat0 %x dsps %lx sbcl %x sts %x msg %x\n", 1528 device_xname(sc->sc_dev), istat, dstat, sstat0, 1529 rp->siop_dsps, rp->siop_sbcl, 1530 sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]); 1531 } 1532 #endif 1533 if (sc->sc_flags & SIOP_INTDEFER) { 1534 sc->sc_flags &= ~(SIOP_INTDEFER | SIOP_INTSOFF); 1535 rp->siop_sien = sc->sc_sien; 1536 rp->siop_dien = sc->sc_dien; 1537 } 1538 if (siop_checkintr (sc, istat, dstat, sstat0, &status)) { 1539 #if 1 1540 if (status == 0xff) 1541 printf ("siopintr: status == 0xff\n"); 1542 #endif 1543 if ((sc->sc_flags & (SIOP_INTSOFF | SIOP_INTDEFER)) != SIOP_INTSOFF) { 1544 #if 0 1545 if (rp->siop_sbcl & SIOP_BSY) { 1546 printf ("%s: SCSI bus busy at completion", 1547 device_xname(sc->sc_dev)); 1548 printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n", 1549 sc->sc_nexus->xs->xs_periph->periph_target, 1550 rp->siop_sbcl, rp->siop_sfbr, rp->siop_lcrc, 1551 rp->siop_dsp - sc->sc_scriptspa); 1552 } 1553 #endif 1554 siop_scsidone(sc->sc_nexus, sc->sc_nexus ? 1555 sc->sc_nexus->stat[0] : -1); 1556 } 1557 } 1558 splx(s); 1559 } 1560 1561 /* 1562 * This is based on the Progressive Peripherals 33Mhz Zeus driver and will 1563 * not be correct for other 53c710 boards. 1564 * 1565 */ 1566 void 1567 scsi_period_to_siop(struct siop_softc *sc, int target) 1568 { 1569 int period, offset, sxfer, sbcl = 0; 1570 #ifdef DEBUG_SYNC 1571 int i; 1572 #endif 1573 1574 period = sc->sc_nexus->msg[4]; 1575 offset = sc->sc_nexus->msg[5]; 1576 #ifdef DEBUG_SYNC 1577 sxfer = 0; 1578 if (offset <= SIOP_MAX_OFFSET) 1579 sxfer = offset; 1580 for (i = 0; i < sizeof (sync_tab) / 2; ++i) { 1581 if (period <= sync_tab[i].p) { 1582 sxfer |= sync_tab[i].r & 0x70; 1583 sbcl = sync_tab[i].r & 0x03; 1584 break; 1585 } 1586 } 1587 printf ("siop sync old: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1588 #endif 1589 for (sbcl = 1; sbcl < 4; ++sbcl) { 1590 sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3; 1591 if (sxfer >= 0 && sxfer <= 7) 1592 break; 1593 } 1594 if (sbcl > 3) { 1595 printf("siop sync: unable to compute sync params for period %dns\n", 1596 period * 4); 1597 /* 1598 * XXX need to pick a value we can do and renegotiate 1599 */ 1600 sxfer = sbcl = 0; 1601 } else { 1602 sxfer = (sxfer << 4) | ((offset <= SIOP_MAX_OFFSET) ? 1603 offset : SIOP_MAX_OFFSET); 1604 #ifdef DEBUG_SYNC 1605 printf("siop sync: params for period %dns: sxfer %x sbcl %x", 1606 period * 4, sxfer, sbcl); 1607 printf(" actual period %dns\n", 1608 sc->sc_tcp[sbcl] * ((sxfer >> 4) + 4)); 1609 #endif 1610 } 1611 sc->sc_sync[target].sxfer = sxfer; 1612 sc->sc_sync[target].sbcl = sbcl; 1613 #ifdef DEBUG_SYNC 1614 printf ("siop sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1615 #endif 1616 } 1617 1618 #ifdef DEBUG 1619 1620 #if SIOP_TRACE_SIZE 1621 void 1622 siop_dump_trace(void) 1623 { 1624 int i; 1625 1626 printf("siop trace: next index %d\n", siop_trix); 1627 i = siop_trix; 1628 do { 1629 printf("%3d: '%c' %02x %02x %02x\n", i, siop_trbuf[i], 1630 siop_trbuf[i + 1], siop_trbuf[i + 2], siop_trbuf[i + 3]); 1631 i = (i + 4) & (SIOP_TRACE_SIZE - 1); 1632 } while (i != siop_trix); 1633 } 1634 #endif 1635 1636 void 1637 siop_dump_acb(struct siop_acb *acb) 1638 { 1639 u_char *b = (u_char *) &acb->cmd; 1640 int i; 1641 1642 printf("acb@%p ", acb); 1643 if (acb->xs == NULL) { 1644 printf("<unused>\n"); 1645 return; 1646 } 1647 printf("(%d:%d) flags %2x clen %2d cmd ", 1648 acb->xs->xs_periph->periph_target, 1649 acb->xs->xs_periph->periph_lun, acb->flags, acb->clen); 1650 for (i = acb->clen; i; --i) 1651 printf(" %02x", *b++); 1652 printf("\n"); 1653 printf(" xs: %p data %p:%04x ", acb->xs, acb->xs->data, 1654 acb->xs->datalen); 1655 printf("va %p:%lx ", acb->iob_buf, acb->iob_len); 1656 printf("cur %lx:%lx\n", acb->iob_curbuf, acb->iob_curlen); 1657 } 1658 1659 void 1660 siop_dump(struct siop_softc *sc) 1661 { 1662 struct siop_acb *acb; 1663 siop_regmap_p rp = sc->sc_siopp; 1664 int s; 1665 int i; 1666 1667 s = splbio(); 1668 #if SIOP_TRACE_SIZE 1669 siop_dump_trace(); 1670 #endif 1671 printf("%s@%p regs %p istat %x\n", 1672 device_xname(sc->sc_dev), sc, rp, rp->siop_istat); 1673 if ((acb = sc->free_list.tqh_first) > 0) { 1674 printf("Free list:\n"); 1675 while (acb) { 1676 siop_dump_acb(acb); 1677 acb = acb->chain.tqe_next; 1678 } 1679 } 1680 if ((acb = sc->ready_list.tqh_first) > 0) { 1681 printf("Ready list:\n"); 1682 while (acb) { 1683 siop_dump_acb(acb); 1684 acb = acb->chain.tqe_next; 1685 } 1686 } 1687 if ((acb = sc->nexus_list.tqh_first) > 0) { 1688 printf("Nexus list:\n"); 1689 while (acb) { 1690 siop_dump_acb(acb); 1691 acb = acb->chain.tqe_next; 1692 } 1693 } 1694 if (sc->sc_nexus) { 1695 printf("Nexus:\n"); 1696 siop_dump_acb(sc->sc_nexus); 1697 } 1698 for (i = 0; i < 8; ++i) { 1699 if (sc->sc_tinfo[i].cmds > 2) { 1700 printf("tgt %d: cmds %d disc %d lubusy %x\n", 1701 i, sc->sc_tinfo[i].cmds, 1702 sc->sc_tinfo[i].dconns, 1703 sc->sc_tinfo[i].lubusy); 1704 } 1705 } 1706 splx(s); 1707 } 1708 #endif 1709