siop.c revision 1.27
1 /* $NetBSD: siop.c,v 1.27 1996/01/07 22:01:58 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Michael L. Hitch 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Van Jacobson of Lawrence Berkeley Laboratory. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)siop.c 7.5 (Berkeley) 5/4/91 40 */ 41 42 /* 43 * AMIGA 53C710 scsi adaptor driver 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/device.h> 49 #include <sys/disklabel.h> 50 #include <sys/dkstat.h> 51 #include <sys/buf.h> 52 #include <scsi/scsi_all.h> 53 #include <scsi/scsiconf.h> 54 #include <machine/cpu.h> 55 #include <amiga/amiga/custom.h> 56 #include <amiga/amiga/isr.h> 57 #include <amiga/dev/siopreg.h> 58 #include <amiga/dev/siopvar.h> 59 60 extern u_int kvtop(); 61 62 /* 63 * SCSI delays 64 * In u-seconds, primarily for state changes on the SPC. 65 */ 66 #define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */ 67 #define SCSI_DATA_WAIT 500000 /* wait per data in/out step */ 68 #define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */ 69 70 void siop_select __P((struct siop_softc *)); 71 void siopabort __P((struct siop_softc *, siop_regmap_p, char *)); 72 void sioperror __P((struct siop_softc *, siop_regmap_p, u_char)); 73 void siopstart __P((struct siop_softc *)); 74 void siopreset __P((struct siop_softc *)); 75 void siopsetdelay __P((int)); 76 void siop_scsidone __P((struct siop_acb *, int)); 77 void siop_sched __P((struct siop_softc *)); 78 int siop_poll __P((struct siop_softc *, struct siop_acb *)); 79 int siopintr __P((struct siop_softc *)); 80 81 /* 53C710 script */ 82 const 83 #include <amiga/dev/siop_script.out> 84 85 /* default to not inhibit sync negotiation on any drive */ 86 u_char siop_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */ 87 u_char siop_allow_disc[8] = {3, 3, 3, 3, 3, 3, 3, 3}; 88 int siop_no_dma = 0; 89 90 int siop_reset_delay = 250; /* delay after reset, in milleseconds */ 91 92 int siop_cmd_wait = SCSI_CMD_WAIT; 93 int siop_data_wait = SCSI_DATA_WAIT; 94 int siop_init_wait = SCSI_INIT_WAIT; 95 96 #ifdef DEBUG 97 /* 98 * sync period transfer lookup - only valid for 66Mhz clock 99 */ 100 static struct { 101 unsigned char p; /* period from sync request message */ 102 unsigned char r; /* siop_period << 4 | sbcl */ 103 } sync_tab[] = { 104 { 60/4, 0<<4 | 1}, 105 { 76/4, 1<<4 | 1}, 106 { 92/4, 2<<4 | 1}, 107 { 92/4, 0<<4 | 2}, 108 {108/4, 3<<4 | 1}, 109 {116/4, 1<<4 | 2}, 110 {120/4, 4<<4 | 1}, 111 {120/4, 0<<4 | 3}, 112 {136/4, 5<<4 | 1}, 113 {140/4, 2<<4 | 2}, 114 {152/4, 6<<4 | 1}, 115 {152/4, 1<<4 | 3}, 116 {164/4, 3<<4 | 2}, 117 {168/4, 7<<4 | 1}, 118 {180/4, 2<<4 | 3}, 119 {184/4, 4<<4 | 2}, 120 {208/4, 5<<4 | 2}, 121 {212/4, 3<<4 | 3}, 122 {232/4, 6<<4 | 2}, 123 {240/4, 4<<4 | 3}, 124 {256/4, 7<<4 | 2}, 125 {272/4, 5<<4 | 3}, 126 {300/4, 6<<4 | 3}, 127 {332/4, 7<<4 | 3} 128 }; 129 #endif 130 131 #ifdef DEBUG 132 /* 133 * 0x01 - full debug 134 * 0x02 - DMA chaining 135 * 0x04 - siopintr 136 * 0x08 - phase mismatch 137 * 0x10 - <not used> 138 * 0x20 - panic on unhandled exceptions 139 * 0x100 - disconnect/reselect 140 */ 141 int siop_debug = 0; 142 int siopsync_debug = 0; 143 int siopdma_hits = 0; 144 int siopdma_misses = 0; 145 int siopchain_ints = 0; 146 int siopstarts = 0; 147 int siopints = 0; 148 int siopphmm = 0; 149 #define SIOP_TRACE_SIZE 128 150 #define SIOP_TRACE(a,b,c,d) \ 151 siop_trbuf[siop_trix] = (a); \ 152 siop_trbuf[siop_trix+1] = (b); \ 153 siop_trbuf[siop_trix+2] = (c); \ 154 siop_trbuf[siop_trix+3] = (d); \ 155 siop_trix = (siop_trix + 4) & (SIOP_TRACE_SIZE - 1); 156 u_char siop_trbuf[SIOP_TRACE_SIZE]; 157 int siop_trix; 158 void siop_dump __P((struct siop_softc *)); 159 void siop_dump_trace __P((void)); 160 #else 161 #define SIOP_TRACE(a,b,c,d) 162 #endif 163 164 165 /* 166 * default minphys routine for siop based controllers 167 */ 168 void 169 siop_minphys(bp) 170 struct buf *bp; 171 { 172 173 /* 174 * No max transfer at this level. 175 */ 176 minphys(bp); 177 } 178 179 /* 180 * used by specific siop controller 181 * 182 */ 183 int 184 siop_scsicmd(xs) 185 struct scsi_xfer *xs; 186 { 187 struct siop_acb *acb; 188 struct siop_softc *sc; 189 struct scsi_link *slp; 190 int flags, s, i; 191 192 slp = xs->sc_link; 193 sc = slp->adapter_softc; 194 flags = xs->flags; 195 196 /* XXXX ?? */ 197 if (flags & SCSI_DATA_UIO) 198 panic("siop: scsi data uio requested"); 199 200 /* XXXX ?? */ 201 if (sc->sc_nexus && flags & SCSI_POLL) 202 /* panic("siop_scsicmd: busy");*/ 203 printf("siop_scsicmd: busy\n"); 204 205 s = splbio(); 206 acb = sc->free_list.tqh_first; 207 if (acb) { 208 TAILQ_REMOVE(&sc->free_list, acb, chain); 209 } 210 splx(s); 211 212 if (acb == NULL) { 213 xs->error = XS_DRIVER_STUFFUP; 214 return(TRY_AGAIN_LATER); 215 } 216 217 acb->flags = ACB_ACTIVE; 218 acb->xs = xs; 219 bcopy(xs->cmd, &acb->cmd, xs->cmdlen); 220 acb->clen = xs->cmdlen; 221 acb->daddr = xs->data; 222 acb->dleft = xs->datalen; 223 224 s = splbio(); 225 TAILQ_INSERT_TAIL(&sc->ready_list, acb, chain); 226 227 if (sc->sc_nexus == NULL) 228 siop_sched(sc); 229 230 splx(s); 231 232 if (flags & SCSI_POLL || siop_no_dma) 233 return(siop_poll(sc, acb)); 234 return(SUCCESSFULLY_QUEUED); 235 } 236 237 int 238 siop_poll(sc, acb) 239 struct siop_softc *sc; 240 struct siop_acb *acb; 241 { 242 siop_regmap_p rp = sc->sc_siopp; 243 struct scsi_xfer *xs = acb->xs; 244 int i; 245 int status; 246 u_char istat; 247 u_char dstat; 248 u_char sstat0; 249 int s; 250 int to; 251 252 s = splbio(); 253 to = xs->timeout / 1000; 254 if (sc->nexus_list.tqh_first) 255 printf("%s: siop_poll called with disconnected device\n", 256 sc->sc_dev.dv_xname); 257 for (;;) { 258 /* use cmd_wait values? */ 259 i = 50000; 260 spl0(); 261 while (((istat = rp->siop_istat) & 262 (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 263 if (--i <= 0) { 264 #ifdef DEBUG 265 printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %x (+%x) dcmd %x ds %x timeout %d\n", 266 xs->sc_link->target, acb->cmd.opcode, 267 rp->siop_sbcl, rp->siop_dsp, 268 rp->siop_dsp - sc->sc_scriptspa, 269 *((long *)&rp->siop_dcmd), &acb->ds, acb->xs->timeout); 270 #endif 271 i = 50000; 272 --to; 273 if (to <= 0) { 274 siopreset(sc); 275 return(COMPLETE); 276 } 277 } 278 delay(10); 279 } 280 sstat0 = rp->siop_sstat0; 281 dstat = rp->siop_dstat; 282 if (siop_checkintr(sc, istat, dstat, sstat0, &status)) { 283 if (acb != sc->sc_nexus) 284 printf("%s: siop_poll disconnected device completed\n", 285 sc->sc_dev.dv_xname); 286 else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 287 sc->sc_flags &= ~SIOP_INTSOFF; 288 rp->siop_sien = sc->sc_sien; 289 rp->siop_dien = sc->sc_dien; 290 } 291 siop_scsidone(sc->sc_nexus, status); 292 } 293 if (xs->flags & ITSDONE) 294 break; 295 } 296 splx(s); 297 return (COMPLETE); 298 } 299 300 /* 301 * start next command that's ready 302 */ 303 void 304 siop_sched(sc) 305 struct siop_softc *sc; 306 { 307 struct scsi_link *slp; 308 struct siop_acb *acb; 309 int stat, i; 310 311 #ifdef DEBUG 312 if (sc->sc_nexus) { 313 printf("%s: siop_sched- nexus %x/%d ready %x/%d\n", 314 sc->sc_dev.dv_xname, sc->sc_nexus, 315 sc->sc_nexus->xs->sc_link->target, 316 sc->ready_list.tqh_first, 317 sc->ready_list.tqh_first->xs->sc_link->target); 318 return; 319 } 320 #endif 321 for (acb = sc->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) { 322 slp = acb->xs->sc_link; 323 i = slp->target; 324 if(!(sc->sc_tinfo[i].lubusy & (1 << slp->lun))) { 325 struct siop_tinfo *ti = &sc->sc_tinfo[i]; 326 327 TAILQ_REMOVE(&sc->ready_list, acb, chain); 328 sc->sc_nexus = acb; 329 slp = acb->xs->sc_link; 330 ti = &sc->sc_tinfo[slp->target]; 331 ti->lubusy |= (1 << slp->lun); 332 break; 333 } 334 } 335 336 if (acb == NULL) { 337 #ifdef DEBUGXXX 338 printf("%s: siop_sched didn't find ready command\n", 339 sc->sc_dev.dv_xname); 340 #endif 341 return; 342 } 343 344 if (acb->xs->flags & SCSI_RESET) 345 siopreset(sc); 346 347 #if 0 348 acb->cmd.bytes[0] |= slp->lun << 5; /* XXXX */ 349 #endif 350 ++sc->sc_active; 351 siop_select(sc); 352 } 353 354 void 355 siop_scsidone(acb, stat) 356 struct siop_acb *acb; 357 int stat; 358 { 359 struct scsi_xfer *xs = acb->xs; 360 struct scsi_link *slp = xs->sc_link; 361 struct siop_softc *sc = slp->adapter_softc; 362 int s, dosched = 0; 363 364 #ifdef DIAGNOSTIC 365 if (acb == NULL || xs == NULL) 366 panic("siop_scsidone"); 367 #endif 368 /* 369 * XXX Support old-style instrumentation for now. 370 * IS THIS REALLY THE RIGHT PLACE FOR THIS? --thorpej 371 */ 372 if (slp->device_softc && 373 ((struct device *)(slp->device_softc))->dv_unit < dk_ndrive) 374 ++dk_xfer[((struct device *)(slp->device_softc))->dv_unit]; 375 /* 376 * is this right? 377 */ 378 xs->status = stat; 379 380 if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) { 381 if (stat == SCSI_CHECK) { 382 struct scsi_sense *ss = (void *)&acb->cmd; 383 bzero(ss, sizeof(*ss)); 384 ss->opcode = REQUEST_SENSE; 385 ss->byte2 = slp->lun << 5; 386 ss->length = sizeof(struct scsi_sense_data); 387 acb->clen = sizeof(*ss); 388 acb->daddr = (char *)&xs->sense; 389 acb->dleft = sizeof(struct scsi_sense_data); 390 acb->flags = ACB_ACTIVE | ACB_CHKSENSE; 391 TAILQ_INSERT_HEAD(&sc->ready_list, acb, chain); 392 --sc->sc_active; 393 sc->sc_tinfo[slp->target].lubusy &= 394 ~(1 << slp->lun); 395 sc->sc_tinfo[slp->target].senses++; 396 if (sc->sc_nexus == acb) { 397 sc->sc_nexus = NULL; 398 siop_sched(sc); 399 } 400 SIOP_TRACE('d','s',0,0) 401 return; 402 } 403 } 404 if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) { 405 xs->error = XS_SENSE; 406 } else { 407 xs->resid = 0; /* XXXX */ 408 } 409 #if whataboutthisone 410 case SCSI_BUSY: 411 xs->error = XS_BUSY; 412 break; 413 #endif 414 xs->flags |= ITSDONE; 415 416 /* 417 * Remove the ACB from whatever queue it's on. We have to do a bit of 418 * a hack to figure out which queue it's on. Note that it is *not* 419 * necessary to cdr down the ready queue, but we must cdr down the 420 * nexus queue and see if it's there, so we can mark the unit as no 421 * longer busy. This code is sickening, but it works. 422 */ 423 if (acb == sc->sc_nexus) { 424 sc->sc_nexus = NULL; 425 sc->sc_tinfo[slp->target].lubusy &= ~(1<<slp->lun); 426 if (sc->ready_list.tqh_first) 427 dosched = 1; /* start next command */ 428 --sc->sc_active; 429 SIOP_TRACE('d','a',stat,0) 430 } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) { 431 TAILQ_REMOVE(&sc->ready_list, acb, chain); 432 SIOP_TRACE('d','r',stat,0) 433 } else { 434 register struct siop_acb *acb2; 435 for (acb2 = sc->nexus_list.tqh_first; acb2; 436 acb2 = acb2->chain.tqe_next) 437 if (acb2 == acb) { 438 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 439 sc->sc_tinfo[slp->target].lubusy 440 &= ~(1<<slp->lun); 441 --sc->sc_active; 442 break; 443 } 444 if (acb2) 445 ; 446 else if (acb->chain.tqe_next) { 447 TAILQ_REMOVE(&sc->ready_list, acb, chain); 448 --sc->sc_active; 449 } else { 450 printf("%s: can't find matching acb\n", 451 sc->sc_dev.dv_xname); 452 #ifdef DDB 453 /* Debugger(); */ 454 #endif 455 } 456 SIOP_TRACE('d','n',stat,0); 457 } 458 /* Put it on the free list. */ 459 acb->flags = ACB_FREE; 460 TAILQ_INSERT_HEAD(&sc->free_list, acb, chain); 461 462 sc->sc_tinfo[slp->target].cmds++; 463 464 scsi_done(xs); 465 466 if (dosched && sc->sc_nexus == NULL) 467 siop_sched(sc); 468 } 469 470 void 471 siopabort(sc, rp, where) 472 register struct siop_softc *sc; 473 siop_regmap_p rp; 474 char *where; 475 { 476 int i; 477 478 printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n", 479 sc->sc_dev.dv_xname, 480 where, rp->siop_dstat, rp->siop_sstat0, rp->siop_sbcl); 481 482 if (sc->sc_active > 0) { 483 #ifdef TODO 484 SET_SBIC_cmd (rp, SBIC_CMD_ABORT); 485 WAIT_CIP (rp); 486 487 GET_SBIC_asr (rp, asr); 488 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) 489 { 490 /* ok, get more drastic.. */ 491 492 SET_SBIC_cmd (rp, SBIC_CMD_RESET); 493 delay(25); 494 SBIC_WAIT(rp, SBIC_ASR_INT, 0); 495 GET_SBIC_csr (rp, csr); /* clears interrupt also */ 496 497 return; 498 } 499 500 do 501 { 502 SBIC_WAIT (rp, SBIC_ASR_INT, 0); 503 GET_SBIC_csr (rp, csr); 504 } 505 while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 506 && (csr != SBIC_CSR_CMD_INVALID)); 507 #endif 508 509 /* lets just hope it worked.. */ 510 #ifdef fix_this 511 for (i = 0; i < 2; ++i) { 512 if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] != 513 sc->sc_cur) { 514 printf ("siopabort: cleanup!\n"); 515 sc->sc_iob[i].sc_xs = NULL; 516 } 517 } 518 #endif /* fix_this */ 519 /* sc->sc_active = 0; */ 520 } 521 } 522 523 void 524 siopinitialize(sc) 525 struct siop_softc *sc; 526 { 527 int i; 528 u_int inhibit_sync; 529 extern u_long scsi_nosync; 530 extern int shift_nosync; 531 532 /* 533 * Need to check that scripts is on a long word boundary 534 * and that DS is on a long word boundary. 535 * Also should verify that dev doesn't span non-contiguous 536 * physical pages. 537 */ 538 sc->sc_scriptspa = kvtop(scripts); 539 sc->sc_tcp[1] = 1000 / sc->sc_clock_freq; 540 sc->sc_tcp[2] = 1500 / sc->sc_clock_freq; 541 sc->sc_tcp[3] = 2000 / sc->sc_clock_freq; 542 sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */ 543 if (sc->sc_minsync < 25) 544 sc->sc_minsync = 25; 545 if (sc->sc_clock_freq <= 25) { 546 sc->sc_dcntl = 0x80; /* SCLK/1 */ 547 sc->sc_tcp[0] = sc->sc_tcp[1]; 548 } else if (sc->sc_clock_freq <= 37) { 549 sc->sc_dcntl = 0x40; /* SCLK/1.5 */ 550 sc->sc_tcp[0] = sc->sc_tcp[2]; 551 } else if (sc->sc_clock_freq <= 50) { 552 sc->sc_dcntl = 0x00; /* SCLK/2 */ 553 sc->sc_tcp[0] = sc->sc_tcp[3]; 554 } else { 555 sc->sc_dcntl = 0xc0; /* SCLK/3 */ 556 sc->sc_tcp[0] = 3000 / sc->sc_clock_freq; 557 } 558 559 if (scsi_nosync) { 560 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff; 561 shift_nosync += 8; 562 #ifdef DEBUG 563 if (inhibit_sync) 564 printf("%s: Inhibiting synchronous transfer %02x\n", 565 sc->sc_dev.dv_xname, inhibit_sync); 566 #endif 567 for (i = 0; i < 8; ++i) 568 if (inhibit_sync & (1 << i)) 569 siop_inhibit_sync[i] = 1; 570 } 571 572 siopreset (sc); 573 } 574 575 void 576 siopreset(sc) 577 struct siop_softc *sc; 578 { 579 siop_regmap_p rp; 580 u_int i, s; 581 u_char dummy; 582 struct siop_acb *acb; 583 584 rp = sc->sc_siopp; 585 586 if (sc->sc_flags & SIOP_ALIVE) 587 siopabort(sc, rp, "reset"); 588 589 printf("%s: ", sc->sc_dev.dv_xname); /* XXXX */ 590 591 s = splbio(); 592 593 /* 594 * Reset the chip 595 * XXX - is this really needed? 596 */ 597 rp->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */ 598 rp->siop_istat |= SIOP_ISTAT_RST; /* reset chip */ 599 rp->siop_istat &= ~SIOP_ISTAT_RST; 600 /* 601 * Reset SCSI bus (do we really want this?) 602 */ 603 rp->siop_sien = 0; 604 rp->siop_scntl1 |= SIOP_SCNTL1_RST; 605 delay(1); 606 rp->siop_scntl1 &= ~SIOP_SCNTL1_RST; 607 608 /* 609 * Set up various chip parameters 610 */ 611 rp->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG; 612 rp->siop_scntl1 = SIOP_SCNTL1_ESR; 613 rp->siop_dcntl = sc->sc_dcntl; 614 rp->siop_dmode = 0x80; /* burst length = 4 */ 615 rp->siop_sien = 0x00; /* don't enable interrupts yet */ 616 rp->siop_dien = 0x00; /* don't enable interrupts yet */ 617 rp->siop_scid = 1 << sc->sc_link.adapter_target; 618 rp->siop_dwt = 0x00; 619 rp->siop_ctest0 |= SIOP_CTEST0_BTD | SIOP_CTEST0_EAN; 620 rp->siop_ctest7 |= sc->sc_ctest7; 621 622 /* will need to re-negotiate sync xfers */ 623 bzero(&sc->sc_sync, sizeof (sc->sc_sync)); 624 625 i = rp->siop_istat; 626 if (i & SIOP_ISTAT_SIP) 627 dummy = rp->siop_sstat0; 628 if (i & SIOP_ISTAT_DIP) 629 dummy = rp->siop_dstat; 630 631 splx (s); 632 633 delay (siop_reset_delay * 1000); 634 printf("siop id %d reset V%d\n", sc->sc_link.adapter_target, 635 rp->siop_ctest8 >> 4); 636 637 if ((sc->sc_flags & SIOP_ALIVE) == 0) { 638 TAILQ_INIT(&sc->ready_list); 639 TAILQ_INIT(&sc->nexus_list); 640 TAILQ_INIT(&sc->free_list); 641 sc->sc_nexus = NULL; 642 acb = sc->sc_acb; 643 bzero(acb, sizeof(sc->sc_acb)); 644 for (i = 0; i < sizeof(sc->sc_acb) / sizeof(*acb); i++) { 645 TAILQ_INSERT_TAIL(&sc->free_list, acb, chain); 646 acb++; 647 } 648 bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo)); 649 } else { 650 if (sc->sc_nexus != NULL) { 651 sc->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 652 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 653 } 654 while (acb = sc->nexus_list.tqh_first) { 655 acb->xs->error = XS_DRIVER_STUFFUP; 656 siop_scsidone(acb, acb->stat[0]); 657 } 658 } 659 660 sc->sc_flags |= SIOP_ALIVE; 661 sc->sc_flags &= ~(SIOP_INTDEFER|SIOP_INTSOFF); 662 /* enable SCSI and DMA interrupts */ 663 sc->sc_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE | 664 SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR; 665 sc->sc_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR | 666 /*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID; 667 rp->siop_sien = sc->sc_sien; 668 rp->siop_dien = sc->sc_dien; 669 } 670 671 /* 672 * Setup Data Storage for 53C710 and start SCRIPTS processing 673 */ 674 675 void 676 siop_start (sc, target, lun, cbuf, clen, buf, len) 677 struct siop_softc *sc; 678 int target; 679 int lun; 680 u_char *cbuf; 681 int clen; 682 u_char *buf; 683 int len; 684 { 685 siop_regmap_p rp = sc->sc_siopp; 686 int i; 687 int nchain; 688 int count, tcount; 689 char *addr, *dmaend; 690 struct siop_acb *acb = sc->sc_nexus; 691 692 #ifdef DEBUG 693 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 694 printf ("ACK! siop was busy: rp %x script %x dsa %x active %d\n", 695 rp, &scripts, &acb->ds, sc->sc_active); 696 printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n", 697 rp->siop_istat, rp->siop_sfbr, rp->siop_lcrc, 698 rp->siop_sien, rp->siop_dien); 699 #ifdef DDB 700 /*Debugger();*/ 701 #endif 702 } 703 #endif 704 acb->msgout[0] = MSG_IDENTIFY | lun; 705 if (siop_allow_disc[target] & 2 || 706 (siop_allow_disc[target] && len == 0)) 707 acb->msgout[0] = MSG_IDENTIFY_DR | lun; 708 acb->status = 0; 709 acb->stat[0] = -1; 710 acb->msg[0] = -1; 711 acb->ds.scsi_addr = (0x10000 << target) | (sc->sc_sync[target].sxfer << 8); 712 acb->ds.idlen = 1; 713 acb->ds.idbuf = (char *) kvtop(&acb->msgout[0]); 714 acb->ds.cmdlen = clen; 715 acb->ds.cmdbuf = (char *) kvtop(cbuf); 716 acb->ds.stslen = 1; 717 acb->ds.stsbuf = (char *) kvtop(&acb->stat[0]); 718 acb->ds.msglen = 1; 719 acb->ds.msgbuf = (char *) kvtop(&acb->msg[0]); 720 acb->msg[1] = -1; 721 acb->ds.msginlen = 1; 722 acb->ds.extmsglen = 1; 723 acb->ds.synmsglen = 3; 724 acb->ds.msginbuf = (char *) kvtop(&acb->msg[1]); 725 acb->ds.extmsgbuf = (char *) kvtop(&acb->msg[2]); 726 acb->ds.synmsgbuf = (char *) kvtop(&acb->msg[3]); 727 bzero(&acb->ds.chain, sizeof (acb->ds.chain)); 728 729 if (sc->sc_sync[target].state == SYNC_START) { 730 if (siop_inhibit_sync[target]) { 731 sc->sc_sync[target].state = SYNC_DONE; 732 sc->sc_sync[target].sbcl = 0; 733 sc->sc_sync[target].sxfer = 0; 734 #ifdef DEBUG 735 if (siopsync_debug) 736 printf ("Forcing target %d asynchronous\n", target); 737 #endif 738 } 739 else { 740 acb->msg[2] = -1; 741 acb->msgout[1] = MSG_EXT_MESSAGE; 742 acb->msgout[2] = 3; 743 acb->msgout[3] = MSG_SYNC_REQ; 744 #ifdef MAXTOR_SYNC_KLUDGE 745 acb->msgout[4] = 50 / 4; /* ask for ridiculous period */ 746 #else 747 acb->msgout[4] = sc->sc_minsync; 748 #endif 749 acb->msgout[5] = SIOP_MAX_OFFSET; 750 acb->ds.idlen = 6; 751 sc->sc_sync[target].state = SYNC_SENT; 752 #ifdef DEBUG 753 if (siopsync_debug) 754 printf ("Sending sync request to target %d\n", target); 755 #endif 756 } 757 } 758 759 /* 760 * Build physical DMA addresses for scatter/gather I/O 761 */ 762 acb->iob_buf = buf; 763 acb->iob_len = len; 764 acb->iob_curbuf = acb->iob_curlen = 0; 765 nchain = 0; 766 count = len; 767 addr = buf; 768 dmaend = NULL; 769 while (count > 0) { 770 acb->ds.chain[nchain].databuf = (char *) kvtop (addr); 771 if (count < (tcount = NBPG - ((int) addr & PGOFSET))) 772 tcount = count; 773 acb->ds.chain[nchain].datalen = tcount; 774 addr += tcount; 775 count -= tcount; 776 if (acb->ds.chain[nchain].databuf == dmaend) { 777 dmaend += acb->ds.chain[nchain].datalen; 778 acb->ds.chain[nchain].datalen = 0; 779 acb->ds.chain[--nchain].datalen += tcount; 780 #ifdef DEBUG 781 ++siopdma_hits; 782 #endif 783 } 784 else { 785 dmaend = acb->ds.chain[nchain].databuf + 786 acb->ds.chain[nchain].datalen; 787 acb->ds.chain[nchain].datalen = tcount; 788 #ifdef DEBUG 789 if (nchain) /* Don't count miss on first one */ 790 ++siopdma_misses; 791 #endif 792 } 793 ++nchain; 794 } 795 #ifdef DEBUG 796 if (nchain != 1 && len != 0 && siop_debug & 3) { 797 printf ("DMA chaining set: %d\n", nchain); 798 for (i = 0; i < nchain; ++i) { 799 printf (" [%d] %8x %4x\n", i, acb->ds.chain[i].databuf, 800 acb->ds.chain[i].datalen); 801 } 802 } 803 #endif 804 805 /* push data cache for all data the 53c710 needs to access */ 806 dma_cachectl (sc, sizeof (struct siop_softc)); 807 dma_cachectl (cbuf, clen); 808 if (buf != NULL && len != 0) 809 dma_cachectl (buf, len); 810 #ifdef DEBUG 811 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 812 printf ("ACK! siop was busy at start: rp %x script %x dsa %x active %d\n", 813 rp, &scripts, &acb->ds, sc->sc_active); 814 #ifdef DDB 815 /*Debugger();*/ 816 #endif 817 } 818 #endif 819 if (sc->nexus_list.tqh_first == NULL) { 820 if (rp->siop_istat & SIOP_ISTAT_CON) 821 printf("%s: siop_select while connected?\n", 822 sc->sc_dev.dv_xname); 823 rp->siop_temp = 0; 824 rp->siop_sbcl = sc->sc_sync[target].sbcl; 825 rp->siop_dsa = kvtop(&acb->ds); 826 rp->siop_dsp = sc->sc_scriptspa; 827 SIOP_TRACE('s',1,0,0) 828 } else { 829 if ((rp->siop_istat & SIOP_ISTAT_CON) == 0) { 830 rp->siop_istat = SIOP_ISTAT_SIGP; 831 SIOP_TRACE('s',2,0,0); 832 } 833 else { 834 SIOP_TRACE('s',3,rp->siop_istat,0); 835 } 836 } 837 #ifdef DEBUG 838 ++siopstarts; 839 #endif 840 } 841 842 /* 843 * Process a DMA or SCSI interrupt from the 53C710 SIOP 844 */ 845 846 int 847 siop_checkintr(sc, istat, dstat, sstat0, status) 848 struct siop_softc *sc; 849 u_char istat; 850 u_char dstat; 851 u_char sstat0; 852 int *status; 853 { 854 siop_regmap_p rp = sc->sc_siopp; 855 struct siop_acb *acb = sc->sc_nexus; 856 int target; 857 int dfifo, dbc, sstat1; 858 859 dfifo = rp->siop_dfifo; 860 dbc = rp->siop_dbc0; 861 sstat1 = rp->siop_sstat1; 862 rp->siop_ctest8 |= SIOP_CTEST8_CLF; 863 while ((rp->siop_ctest1 & SIOP_CTEST1_FMT) != SIOP_CTEST1_FMT) 864 ; 865 rp->siop_ctest8 &= ~SIOP_CTEST8_CLF; 866 #ifdef DEBUG 867 ++siopints; 868 #if 0 869 if (siop_debug & 0x100) { 870 DCIAS(&acb->stat[0]); /* XXX */ 871 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 872 istat, dstat, sstat0, rp->siop_dsps, rp->siop_sbcl, acb->stat[0], acb->msg[0]); 873 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 874 acb->msg[0], acb->msg[1], acb->msg[2], 875 acb->msg[3], acb->msg[4], acb->msg[5]); 876 } 877 #endif 878 if (rp->siop_dsp && (rp->siop_dsp < sc->sc_scriptspa || 879 rp->siop_dsp >= sc->sc_scriptspa + sizeof(scripts))) { 880 printf ("%s: dsp not within script dsp %x scripts %x:%x", 881 sc->sc_dev.dv_xname, rp->siop_dsp, sc->sc_scriptspa, 882 sc->sc_scriptspa + sizeof(scripts)); 883 printf(" istat %x dstat %x sstat0 %x\n", 884 istat, dstat, sstat0); 885 Debugger(); 886 } 887 #endif 888 SIOP_TRACE('i',dstat,istat,(istat&SIOP_ISTAT_DIP)?rp->siop_dsps&0xff:sstat0); 889 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff00) { 890 /* Normal completion status, or check condition */ 891 #ifdef DEBUG 892 if (rp->siop_dsa != kvtop(&acb->ds)) { 893 printf ("siop: invalid dsa: %x %x\n", rp->siop_dsa, 894 kvtop(&acb->ds)); 895 panic("*** siop DSA invalid ***"); 896 } 897 #endif 898 target = acb->xs->sc_link->target; 899 if (sc->sc_sync[target].state == SYNC_SENT) { 900 #ifdef DEBUG 901 if (siopsync_debug) 902 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 903 acb->msg[0], acb->msg[1], acb->msg[2], 904 acb->msg[3], acb->msg[4], acb->msg[5]); 905 #endif 906 if (acb->msg[1] == 0xff) 907 printf ("%s: target %d ignored sync request\n", 908 sc->sc_dev.dv_xname, target); 909 else if (acb->msg[1] == MSG_REJECT) 910 printf ("%s: target %d rejected sync request\n", 911 sc->sc_dev.dv_xname, target); 912 sc->sc_sync[target].state = SYNC_DONE; 913 sc->sc_sync[target].sxfer = 0; 914 sc->sc_sync[target].sbcl = 0; 915 if (acb->msg[2] == 3 && 916 acb->msg[3] == MSG_SYNC_REQ && 917 acb->msg[5] != 0) { 918 #ifdef MAXTOR_KLUDGE 919 /* 920 * Kludge for my Maxtor XT8580S 921 * It accepts whatever we request, even 922 * though it won't work. So we ask for 923 * a short period than we can handle. If 924 * the device says it can do it, use 208ns. 925 * If the device says it can do less than 926 * 100ns, then we limit it to 100ns. 927 */ 928 if (acb->msg[4] && acb->msg[4] < 100 / 4) { 929 #ifdef DEBUG 930 printf ("%d: target %d wanted %dns period\n", 931 sc->sc_dev.dv_xname, target, 932 acb->msg[4] * 4); 933 #endif 934 if (acb->msg[4] == 50 / 4) 935 acb->msg[4] = 208 / 4; 936 else 937 acb->msg[4] = 100 / 4; 938 } 939 #endif /* MAXTOR_KLUDGE */ 940 printf ("%s: target %d now synchronous, period=%dns, offset=%d\n", 941 sc->sc_dev.dv_xname, target, 942 acb->msg[4] * 4, acb->msg[5]); 943 scsi_period_to_siop (sc, target); 944 } 945 } 946 dma_cachectl(&acb->stat[0], 1); 947 *status = acb->stat[0]; 948 #ifdef DEBUG 949 if (rp->siop_sbcl & SIOP_BSY) { 950 /*printf ("ACK! siop was busy at end: rp %x script %x dsa %x\n", 951 rp, &scripts, &acb->ds);*/ 952 #ifdef DDB 953 /*Debugger();*/ 954 #endif 955 } 956 if (acb->msg[0] != 0x00) 957 printf("%s: message was not COMMAND COMPLETE: %x\n", 958 sc->sc_dev.dv_xname, acb->msg[0]); 959 #endif 960 if (sc->nexus_list.tqh_first) 961 rp->siop_dcntl |= SIOP_DCNTL_STD; 962 return 1; 963 } 964 if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */ 965 #ifdef DEBUG 966 ++siopphmm; 967 if (acb == NULL) 968 printf("%s: Phase mismatch with no active command?\n", 969 sc->sc_dev.dv_xname); 970 #endif 971 if (acb->iob_len) { 972 int adjust; 973 adjust = ((dfifo - (dbc & 0x7f)) & 0x7f); 974 if (sstat1 & SIOP_SSTAT1_ORF) 975 ++adjust; 976 if (sstat1 & SIOP_SSTAT1_OLF) 977 ++adjust; 978 acb->iob_curlen = *((long *)&rp->siop_dcmd) & 0xffffff; 979 acb->iob_curlen += adjust; 980 acb->iob_curbuf = *((long *)&rp->siop_dnad) - adjust; 981 #ifdef DEBUG 982 if (siop_debug & 0x100) { 983 int i; 984 printf ("Phase mismatch: curbuf %x curlen %x dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %x\n", 985 acb->iob_curbuf, acb->iob_curlen, dfifo, 986 dbc, sstat1, adjust, rp->siop_sbcl, siopstarts, acb); 987 if (acb->ds.chain[1].datalen) { 988 for (i = 0; acb->ds.chain[i].datalen; ++i) 989 printf("chain[%d] addr %x len %x\n", 990 i, acb->ds.chain[i].databuf, 991 acb->ds.chain[i].datalen); 992 } 993 } 994 #endif 995 dma_cachectl (acb, sizeof(*acb)); 996 } 997 #ifdef DEBUG 998 SIOP_TRACE('m',rp->siop_sbcl,(rp->siop_dsp>>8),rp->siop_dsp); 999 if (siop_debug & 9) 1000 printf ("Phase mismatch: %x dsp +%x dcmd %x\n", 1001 rp->siop_sbcl, 1002 rp->siop_dsp - sc->sc_scriptspa, 1003 *((long *)&rp->siop_dcmd)); 1004 #endif 1005 if ((rp->siop_sbcl & SIOP_REQ) == 0) { 1006 printf ("Phase mismatch: REQ not asserted! %02x dsp %x\n", 1007 rp->siop_sbcl, rp->siop_dsp); 1008 #ifdef DEBUG 1009 Debugger(); 1010 #endif 1011 } 1012 switch (rp->siop_sbcl & 7) { 1013 case 0: /* data out */ 1014 case 1: /* data in */ 1015 case 2: /* status */ 1016 case 3: /* command */ 1017 case 6: /* message in */ 1018 case 7: /* message out */ 1019 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1020 break; 1021 default: 1022 goto bad_phase; 1023 } 1024 return 0; 1025 } 1026 if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */ 1027 #ifdef DEBUG 1028 if (acb == NULL) 1029 printf("%s: Select timeout with no active command?\n", 1030 sc->sc_dev.dv_xname); 1031 if (rp->siop_sbcl & SIOP_BSY) { 1032 printf ("ACK! siop was busy at timeout: rp %x script %x dsa %x\n", 1033 rp, &scripts, &acb->ds); 1034 printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n", 1035 rp->siop_sbcl, rp->siop_sdid, istat, dstat, sstat0); 1036 if (!(rp->siop_sbcl & SIOP_BSY)) { 1037 printf ("Yikes, it's not busy now!\n"); 1038 #if 0 1039 *status = -1; 1040 if (sc->nexus_list.tqh_first) 1041 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1042 return 1; 1043 #endif 1044 } 1045 /* rp->siop_dcntl |= SIOP_DCNTL_STD;*/ 1046 return (0); 1047 #ifdef DDB 1048 Debugger(); 1049 #endif 1050 } 1051 #endif 1052 *status = -1; 1053 acb->xs->error = XS_SELTIMEOUT; 1054 if (sc->nexus_list.tqh_first) 1055 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1056 return 1; 1057 } 1058 if (acb) 1059 target = acb->xs->sc_link->target; 1060 else 1061 target = 7; 1062 if (sstat0 & SIOP_SSTAT0_UDC) { 1063 #ifdef DEBUG 1064 if (acb == NULL) 1065 printf("%s: Unexpected disconnect with no active command?\n", 1066 sc->sc_dev.dv_xname); 1067 printf ("%s: target %d disconnected unexpectedly\n", 1068 sc->sc_dev.dv_xname, target); 1069 #endif 1070 #if 0 1071 siopabort (sc, rp, "siopchkintr"); 1072 #endif 1073 *status = STS_BUSY; 1074 if (sc->nexus_list.tqh_first) 1075 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1076 return 1; 1077 } 1078 if (dstat & SIOP_DSTAT_SIR && (rp->siop_dsps == 0xff01 || 1079 rp->siop_dsps == 0xff02)) { 1080 #ifdef DEBUG 1081 if (siop_debug & 0x100) 1082 printf ("%s: ID %02x disconnected TEMP %x (+%x) curbuf %x curlen %x buf %x len %x dfifo %x dbc %x sstat1 %x starts %d acb %x\n", 1083 sc->sc_dev.dv_xname, 1 << target, rp->siop_temp, 1084 rp->siop_temp ? rp->siop_temp - sc->sc_scriptspa : 0, 1085 acb->iob_curbuf, acb->iob_curlen, 1086 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, siopstarts, acb); 1087 #endif 1088 if (acb == NULL) { 1089 printf("%s: Disconnect with no active command?\n", 1090 sc->sc_dev.dv_xname); 1091 return (0); 1092 } 1093 /* 1094 * XXXX need to update iob_curbuf/iob_curlen to reflect 1095 * current data transferred. If device disconnected in 1096 * the middle of a DMA block, they should already be set 1097 * by the phase change interrupt. If the disconnect 1098 * occurs on a DMA block boundary, we have to figure out 1099 * which DMA block it was. 1100 */ 1101 if (acb->iob_len && rp->siop_temp) { 1102 int n = rp->siop_temp - sc->sc_scriptspa; 1103 1104 if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen) 1105 printf("%s: iob_curbuf/len already set? n %x iob %x/%x chain[0] %x/%x\n", 1106 sc->sc_dev.dv_xname, n, acb->iob_curbuf, acb->iob_curlen, 1107 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen); 1108 if (n < Ent_datain) 1109 n = (n - Ent_dataout) / 16; 1110 else 1111 n = (n - Ent_datain) / 16; 1112 if (n <= 0 && n > DMAMAXIO) 1113 printf("TEMP invalid %d\n", n); 1114 else { 1115 acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf; 1116 acb->iob_curlen = acb->ds.chain[n].datalen; 1117 } 1118 #ifdef DEBUG 1119 if (siop_debug & 0x100) { 1120 printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n); 1121 printf(" curbuf %x curlen %x\n", acb->iob_curbuf, 1122 acb->iob_curlen); 1123 } 1124 #endif 1125 } 1126 /* 1127 * If data transfer was interrupted by disconnect, iob_curbuf 1128 * and iob_curlen should reflect the point of interruption. 1129 * Adjust the DMA chain so that the data transfer begins 1130 * at the appropriate place upon reselection. 1131 * XXX This should only be done on save data pointer message? 1132 */ 1133 if (acb->iob_curlen) { 1134 int i, j; 1135 1136 #ifdef DEBUG 1137 if (siop_debug & 0x100) 1138 printf ("%s: adjusting DMA chain\n", 1139 sc->sc_dev.dv_xname); 1140 if (rp->siop_dsps == 0xff02) 1141 printf ("%s: ID %02x disconnected without Save Data Pointers\n", 1142 sc->sc_dev.dv_xname, 1 << target); 1143 #endif 1144 for (i = 0; i < DMAMAXIO; ++i) { 1145 if (acb->ds.chain[i].datalen == 0) 1146 break; 1147 if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf && 1148 acb->iob_curbuf < (long)(acb->ds.chain[i].databuf + 1149 acb->ds.chain[i].datalen)) 1150 break; 1151 } 1152 if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0) 1153 printf("couldn't find saved data pointer\n"); 1154 #ifdef DEBUG 1155 if (siop_debug & 0x100) 1156 printf(" chain[0]: %x/%x -> %x/%x\n", 1157 acb->ds.chain[0].databuf, 1158 acb->ds.chain[0].datalen, 1159 acb->iob_curbuf, 1160 acb->iob_curlen); 1161 #endif 1162 acb->ds.chain[0].databuf = (char *)acb->iob_curbuf; 1163 acb->ds.chain[0].datalen = acb->iob_curlen; 1164 for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) { 1165 #ifdef DEBUG 1166 if (siop_debug & 0x100) 1167 printf(" chain[%d]: %x/%x -> %x/%x\n", j, 1168 acb->ds.chain[j].databuf, 1169 acb->ds.chain[j].datalen, 1170 acb->ds.chain[i].databuf, 1171 acb->ds.chain[i].datalen); 1172 #endif 1173 acb->ds.chain[j].databuf = acb->ds.chain[i].databuf; 1174 acb->ds.chain[j].datalen = acb->ds.chain[i].datalen; 1175 } 1176 if (j < DMAMAXIO) 1177 acb->ds.chain[j].datalen = 0; 1178 DCIAS(kvtop(&acb->ds.chain)); 1179 } 1180 ++sc->sc_tinfo[target].dconns; 1181 /* 1182 * add nexus to waiting list 1183 * clear nexus 1184 * try to start another command for another target/lun 1185 */ 1186 acb->status = sc->sc_flags & SIOP_INTSOFF; 1187 TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain); 1188 sc->sc_nexus = NULL; /* no current device */ 1189 /* start script to wait for reselect */ 1190 if (sc->sc_nexus == NULL) 1191 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1192 /* XXXX start another command ? */ 1193 if (sc->ready_list.tqh_first) 1194 siop_sched(sc); 1195 return (0); 1196 } 1197 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff03) { 1198 int reselid = rp->siop_scratch & 0x7f; 1199 int reselun = rp->siop_sfbr & 0x07; 1200 1201 sc->sc_sstat1 = rp->siop_sbcl; /* XXXX save current SBCL */ 1202 #ifdef DEBUG 1203 if (siop_debug & 0x100) 1204 printf ("%s: target ID %02x reselected dsps %x\n", 1205 sc->sc_dev.dv_xname, reselid, 1206 rp->siop_dsps); 1207 if ((rp->siop_sfbr & 0x80) == 0) 1208 printf("%s: Reselect message in was not identify: %x\n", 1209 sc->sc_dev.dv_xname, rp->siop_sfbr); 1210 #endif 1211 if (sc->sc_nexus) { 1212 #ifdef DEBUG 1213 if (siop_debug & 0x100) 1214 printf ("%s: reselect ID %02x w/active\n", 1215 sc->sc_dev.dv_xname, reselid); 1216 #endif 1217 TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain); 1218 sc->sc_tinfo[sc->sc_nexus->xs->sc_link->target].lubusy 1219 &= ~(1 << sc->sc_nexus->xs->sc_link->lun); 1220 --sc->sc_active; 1221 } 1222 /* 1223 * locate acb of reselecting device 1224 * set sc->sc_nexus to acb 1225 */ 1226 for (acb = sc->nexus_list.tqh_first; acb; 1227 acb = acb->chain.tqe_next) { 1228 if (reselid != (acb->ds.scsi_addr >> 16) || 1229 reselun != (acb->msgout[0] & 0x07)) 1230 continue; 1231 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 1232 sc->sc_nexus = acb; 1233 sc->sc_flags |= acb->status; 1234 acb->status = 0; 1235 DCIAS(kvtop(&acb->stat[0])); 1236 rp->siop_dsa = kvtop(&acb->ds); 1237 rp->siop_sxfer = sc->sc_sync[acb->xs->sc_link->target].sxfer; 1238 rp->siop_sbcl = sc->sc_sync[acb->xs->sc_link->target].sbcl; 1239 break; 1240 } 1241 if (acb == NULL) { 1242 printf("%s: target ID %02x reselect nexus_list %x\n", 1243 sc->sc_dev.dv_xname, reselid, 1244 sc->nexus_list.tqh_first); 1245 panic("unable to find reselecting device"); 1246 } 1247 dma_cachectl (acb, sizeof(*acb)); 1248 rp->siop_temp = 0; 1249 rp->siop_dcntl |= SIOP_DCNTL_STD; 1250 return (0); 1251 } 1252 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff04) { 1253 u_short ctest2 = rp->siop_ctest2; 1254 1255 /* reselect was interrupted (by Sig_P or select) */ 1256 #ifdef DEBUG 1257 if (siop_debug & 0x100 || 1258 (ctest2 & SIOP_CTEST2_SIGP) == 0) 1259 printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x istat %x/%x\n", 1260 sc->sc_dev.dv_xname, rp->siop_scntl1, 1261 ctest2, rp->siop_sfbr, istat, rp->siop_istat); 1262 #endif 1263 /* XXX assumes it was not select */ 1264 if (sc->sc_nexus == NULL) { 1265 printf("%s: reselect interrupted, sc_nexus == NULL\n", 1266 sc->sc_dev.dv_xname); 1267 #if 0 1268 siop_dump(sc); 1269 #ifdef DDB 1270 Debugger(); 1271 #endif 1272 #endif 1273 rp->siop_dcntl |= SIOP_DCNTL_STD; 1274 return(0); 1275 } 1276 target = sc->sc_nexus->xs->sc_link->target; 1277 rp->siop_temp = 0; 1278 rp->siop_dsa = kvtop(&sc->sc_nexus->ds); 1279 rp->siop_sxfer = sc->sc_sync[target].sxfer; 1280 rp->siop_sbcl = sc->sc_sync[target].sbcl; 1281 rp->siop_dsp = sc->sc_scriptspa; 1282 return (0); 1283 } 1284 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff06) { 1285 if (acb == NULL) 1286 printf("%s: Bad message-in with no active command?\n", 1287 sc->sc_dev.dv_xname); 1288 /* Unrecognized message in byte */ 1289 dma_cachectl (&acb->msg[1],1); 1290 printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n", 1291 sc->sc_dev.dv_xname, rp->siop_sfbr, acb->msg[1], rp->siop_sbcl); 1292 /* what should be done here? */ 1293 DCIAS(kvtop(&acb->msg[1])); 1294 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1295 return (0); 1296 } 1297 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0a) { 1298 /* Status phase wasn't followed by message in phase? */ 1299 printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n", 1300 sc->sc_dev.dv_xname, rp->siop_sbcl, rp->siop_sbdl); 1301 if (rp->siop_sbcl == 0xa7) { 1302 /* It is now, just continue the script? */ 1303 rp->siop_dcntl |= SIOP_DCNTL_STD; 1304 return (0); 1305 } 1306 } 1307 if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) { 1308 dma_cachectl (&acb->stat[0], 1); 1309 dma_cachectl (&acb->msg[0], 1); 1310 printf ("SIOP interrupt: %x sts %x msg %x %x sbcl %x\n", 1311 rp->siop_dsps, acb->stat[0], acb->msg[0], acb->msg[1], 1312 rp->siop_sbcl); 1313 siopreset (sc); 1314 *status = -1; 1315 return 0; /* siopreset has cleaned up */ 1316 } 1317 if (sstat0 & SIOP_SSTAT0_SGE) 1318 printf ("SIOP: SCSI Gross Error\n"); 1319 if (sstat0 & SIOP_SSTAT0_PAR) 1320 printf ("SIOP: Parity Error\n"); 1321 if (dstat & SIOP_DSTAT_IID) 1322 printf ("SIOP: Invalid instruction detected\n"); 1323 bad_phase: 1324 /* 1325 * temporary panic for unhandled conditions 1326 * displays various things about the 53C710 status and registers 1327 * then panics. 1328 * XXXX need to clean this up to print out the info, reset, and continue 1329 */ 1330 printf ("siopchkintr: target %x ds %x\n", target, &acb->ds); 1331 printf ("scripts %x ds %x rp %x dsp %x dcmd %x\n", sc->sc_scriptspa, 1332 kvtop(&acb->ds), kvtop(rp), rp->siop_dsp, 1333 *((long *)&rp->siop_dcmd)); 1334 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x dsa %x sbcl %x sts %x msg %x %x sfbr %x\n", 1335 istat, dstat, sstat0, rp->siop_dsps, rp->siop_dsa, 1336 rp->siop_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->siop_sfbr); 1337 #ifdef DEBUG 1338 if (siop_debug & 0x20) 1339 panic("siopchkintr: **** temp ****"); 1340 #endif 1341 #ifdef DDB 1342 Debugger (); 1343 #endif 1344 siopreset (sc); /* hard reset */ 1345 *status = -1; 1346 return 0; /* siopreset cleaned up */ 1347 } 1348 1349 void 1350 siop_select(sc) 1351 struct siop_softc *sc; 1352 { 1353 siop_regmap_p rp; 1354 struct siop_acb *acb = sc->sc_nexus; 1355 1356 #ifdef DEBUG 1357 if (siop_debug & 1) 1358 printf ("%s: select ", sc->sc_dev.dv_xname); 1359 #endif 1360 1361 rp = sc->sc_siopp; 1362 if (acb->xs->flags & SCSI_POLL || siop_no_dma) { 1363 sc->sc_flags |= SIOP_INTSOFF; 1364 sc->sc_flags &= ~SIOP_INTDEFER; 1365 if ((rp->siop_istat & 0x08) == 0) { 1366 rp->siop_sien = 0; 1367 rp->siop_dien = 0; 1368 } 1369 #if 0 1370 } else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 1371 sc->sc_flags &= ~SIOP_INTSOFF; 1372 if ((rp->siop_istat & 0x08) == 0) { 1373 rp->siop_sien = sc->sc_sien; 1374 rp->siop_dien = sc->sc_dien; 1375 } 1376 #endif 1377 } 1378 #ifdef DEBUG 1379 if (siop_debug & 1) 1380 printf ("siop_select: target %x cmd %02x ds %x\n", 1381 acb->xs->sc_link->target, acb->cmd.opcode, 1382 &sc->sc_nexus->ds); 1383 #endif 1384 1385 siop_start(sc, acb->xs->sc_link->target, acb->xs->sc_link->lun, 1386 &acb->cmd, acb->clen, acb->daddr, acb->dleft); 1387 1388 return; 1389 } 1390 1391 /* 1392 * 53C710 interrupt handler 1393 */ 1394 1395 int 1396 siopintr (sc) 1397 register struct siop_softc *sc; 1398 { 1399 siop_regmap_p rp; 1400 register u_char istat, dstat, sstat0; 1401 int status; 1402 int s = splbio(); 1403 1404 istat = sc->sc_istat; 1405 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 1406 splx(s); 1407 return; 1408 } 1409 1410 /* Got a valid interrupt on this device */ 1411 rp = sc->sc_siopp; 1412 dstat = sc->sc_dstat; 1413 sstat0 = sc->sc_sstat0; 1414 if (dstat & SIOP_DSTAT_SIR) 1415 sc->sc_intcode = rp->siop_dsps; 1416 sc->sc_istat = 0; 1417 #ifdef DEBUG 1418 if (siop_debug & 1) 1419 printf ("%s: intr istat %x dstat %x sstat0 %x\n", 1420 sc->sc_dev.dv_xname, istat, dstat, sstat0); 1421 if (!sc->sc_active) { 1422 printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x status %x\n", 1423 sc->sc_dev.dv_xname, istat, dstat, sstat0, sc->sc_nexus->stat[0]); 1424 } 1425 #endif 1426 1427 #ifdef DEBUG 1428 if (siop_debug & 5) { 1429 DCIAS(kvtop(&sc->sc_nexus->stat[0])); 1430 printf ("%s: intr istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 1431 sc->sc_dev.dv_xname, istat, dstat, sstat0, 1432 rp->siop_dsps, rp->siop_sbcl, 1433 sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]); 1434 } 1435 #endif 1436 if (sc->sc_flags & SIOP_INTDEFER) { 1437 sc->sc_flags &= ~(SIOP_INTDEFER | SIOP_INTSOFF); 1438 rp->siop_sien = sc->sc_sien; 1439 rp->siop_dien = sc->sc_dien; 1440 } 1441 if (siop_checkintr (sc, istat, dstat, sstat0, &status)) { 1442 #if 1 1443 if (status == 0xff) 1444 printf ("siopintr: status == 0xff\n"); 1445 #endif 1446 if ((sc->sc_flags & (SIOP_INTSOFF | SIOP_INTDEFER)) != SIOP_INTSOFF) { 1447 #if 0 1448 if (rp->siop_sbcl & SIOP_BSY) { 1449 printf ("%s: SCSI bus busy at completion", 1450 sc->sc_dev.dv_xname); 1451 printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n", 1452 sc->sc_nexus->xs->sc_link->target, 1453 rp->siop_sbcl, rp->siop_sfbr, rp->siop_lcrc, 1454 rp->siop_dsp - sc->sc_scriptspa); 1455 } 1456 #endif 1457 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 1458 } 1459 } 1460 splx(s); 1461 } 1462 1463 /* 1464 * This is based on the Progressive Peripherals 33Mhz Zeus driver and will 1465 * not be correct for other 53c710 boards. 1466 * 1467 */ 1468 scsi_period_to_siop (sc, target) 1469 struct siop_softc *sc; 1470 { 1471 int period, offset, i, sxfer, sbcl; 1472 1473 period = sc->sc_nexus->msg[4]; 1474 offset = sc->sc_nexus->msg[5]; 1475 #ifdef DEBUG 1476 sxfer = 0; 1477 if (offset <= SIOP_MAX_OFFSET) 1478 sxfer = offset; 1479 for (i = 0; i < sizeof (sync_tab) / 2; ++i) { 1480 if (period <= sync_tab[i].p) { 1481 sxfer |= sync_tab[i].r & 0x70; 1482 sbcl = sync_tab[i].r & 0x03; 1483 break; 1484 } 1485 } 1486 printf ("siop sync old: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1487 #endif 1488 for (sbcl = 1; sbcl < 4; ++sbcl) { 1489 sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3; 1490 if (sxfer >= 0 && sxfer <= 7) 1491 break; 1492 } 1493 if (sbcl > 3) { 1494 printf("siop sync: unable to compute sync params for period %dns\n", 1495 period * 4); 1496 /* 1497 * XXX need to pick a value we can do and renegotiate 1498 */ 1499 sxfer = sbcl = 0; 1500 } else { 1501 sxfer = (sxfer << 4) | ((offset <= SIOP_MAX_OFFSET) ? 1502 offset : SIOP_MAX_OFFSET); 1503 printf("siop sync: params for period %dns: sxfer %x sbcl %x", 1504 period * 4, sxfer, sbcl); 1505 printf(" actual period %dns\n", 1506 sc->sc_tcp[sbcl] * ((sxfer >> 4) + 4)); 1507 } 1508 sc->sc_sync[target].sxfer = sxfer; 1509 sc->sc_sync[target].sbcl = sbcl; 1510 #ifdef DEBUG 1511 printf ("siop sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1512 #endif 1513 } 1514 1515 #ifdef DEBUG 1516 1517 #if SIOP_TRACE_SIZE 1518 void 1519 siop_dump_trace() 1520 { 1521 int i; 1522 1523 printf("siop trace: next index %d\n", siop_trix); 1524 i = siop_trix; 1525 do { 1526 printf("%3d: '%c' %02x %02x %02x\n", i, siop_trbuf[i], 1527 siop_trbuf[i + 1], siop_trbuf[i + 2], siop_trbuf[i + 3]); 1528 i = (i + 4) & (SIOP_TRACE_SIZE - 1); 1529 } while (i != siop_trix); 1530 } 1531 #endif 1532 1533 void 1534 siop_dump_acb(acb) 1535 struct siop_acb *acb; 1536 { 1537 u_char *b = (u_char *) &acb->cmd; 1538 int i; 1539 1540 printf("acb@%x ", acb); 1541 if (acb->xs == NULL) { 1542 printf("<unused>\n"); 1543 return; 1544 } 1545 printf("(%d:%d) flags %2x clen %2d cmd ", acb->xs->sc_link->target, 1546 acb->xs->sc_link->lun, acb->flags, acb->clen); 1547 for (i = acb->clen; i; --i) 1548 printf(" %02x", *b++); 1549 printf("\n"); 1550 printf(" xs: %08x data %8x:%04x ", acb->xs, acb->xs->data, 1551 acb->xs->datalen); 1552 printf("va %8x:%04x ", acb->iob_buf, acb->iob_len); 1553 printf("cur %8x:%04x\n", acb->iob_curbuf, acb->iob_curlen); 1554 } 1555 1556 void 1557 siop_dump(sc) 1558 struct siop_softc *sc; 1559 { 1560 struct siop_acb *acb; 1561 siop_regmap_p rp = sc->sc_siopp; 1562 int s; 1563 int i; 1564 1565 s = splbio(); 1566 #if SIOP_TRACE_SIZE 1567 siop_dump_trace(); 1568 #endif 1569 printf("%s@%x regs %x istat %x\n", 1570 sc->sc_dev.dv_xname, sc, rp, rp->siop_istat); 1571 if (acb = sc->free_list.tqh_first) { 1572 printf("Free list:\n"); 1573 while (acb) { 1574 siop_dump_acb(acb); 1575 acb = acb->chain.tqe_next; 1576 } 1577 } 1578 if (acb = sc->ready_list.tqh_first) { 1579 printf("Ready list:\n"); 1580 while (acb) { 1581 siop_dump_acb(acb); 1582 acb = acb->chain.tqe_next; 1583 } 1584 } 1585 if (acb = sc->nexus_list.tqh_first) { 1586 printf("Nexus list:\n"); 1587 while (acb) { 1588 siop_dump_acb(acb); 1589 acb = acb->chain.tqe_next; 1590 } 1591 } 1592 if (sc->sc_nexus) { 1593 printf("Nexus:\n"); 1594 siop_dump_acb(sc->sc_nexus); 1595 } 1596 for (i = 0; i < 8; ++i) { 1597 if (sc->sc_tinfo[i].cmds > 2) { 1598 printf("tgt %d: cmds %d disc %d senses %d lubusy %x\n", 1599 i, sc->sc_tinfo[i].cmds, 1600 sc->sc_tinfo[i].dconns, 1601 sc->sc_tinfo[i].senses, 1602 sc->sc_tinfo[i].lubusy); 1603 } 1604 } 1605 splx(s); 1606 } 1607 #endif 1608
Indexes created Thu Sep 25 02:09:54 GMT 2025