siop.c revision 1.26
1 /* $NetBSD: siop.c,v 1.26 1995/11/30 00:57:23 jtc 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 if (slp->device_softc && 369 ((struct device *)(slp->device_softc))->dv_unit < dk_ndrive) 370 ++dk_xfer[((struct device *)(slp->device_softc))->dv_unit]; 371 /* 372 * is this right? 373 */ 374 xs->status = stat; 375 376 if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) { 377 if (stat == SCSI_CHECK) { 378 struct scsi_sense *ss = (void *)&acb->cmd; 379 bzero(ss, sizeof(*ss)); 380 ss->opcode = REQUEST_SENSE; 381 ss->byte2 = slp->lun << 5; 382 ss->length = sizeof(struct scsi_sense_data); 383 acb->clen = sizeof(*ss); 384 acb->daddr = (char *)&xs->sense; 385 acb->dleft = sizeof(struct scsi_sense_data); 386 acb->flags = ACB_ACTIVE | ACB_CHKSENSE; 387 TAILQ_INSERT_HEAD(&sc->ready_list, acb, chain); 388 --sc->sc_active; 389 sc->sc_tinfo[slp->target].lubusy &= 390 ~(1 << slp->lun); 391 sc->sc_tinfo[slp->target].senses++; 392 if (sc->sc_nexus == acb) { 393 sc->sc_nexus = NULL; 394 siop_sched(sc); 395 } 396 SIOP_TRACE('d','s',0,0) 397 return; 398 } 399 } 400 if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) { 401 xs->error = XS_SENSE; 402 } else { 403 xs->resid = 0; /* XXXX */ 404 } 405 #if whataboutthisone 406 case SCSI_BUSY: 407 xs->error = XS_BUSY; 408 break; 409 #endif 410 xs->flags |= ITSDONE; 411 412 /* 413 * Remove the ACB from whatever queue it's on. We have to do a bit of 414 * a hack to figure out which queue it's on. Note that it is *not* 415 * necessary to cdr down the ready queue, but we must cdr down the 416 * nexus queue and see if it's there, so we can mark the unit as no 417 * longer busy. This code is sickening, but it works. 418 */ 419 if (acb == sc->sc_nexus) { 420 sc->sc_nexus = NULL; 421 sc->sc_tinfo[slp->target].lubusy &= ~(1<<slp->lun); 422 if (sc->ready_list.tqh_first) 423 dosched = 1; /* start next command */ 424 --sc->sc_active; 425 SIOP_TRACE('d','a',stat,0) 426 } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) { 427 TAILQ_REMOVE(&sc->ready_list, acb, chain); 428 SIOP_TRACE('d','r',stat,0) 429 } else { 430 register struct siop_acb *acb2; 431 for (acb2 = sc->nexus_list.tqh_first; acb2; 432 acb2 = acb2->chain.tqe_next) 433 if (acb2 == acb) { 434 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 435 sc->sc_tinfo[slp->target].lubusy 436 &= ~(1<<slp->lun); 437 --sc->sc_active; 438 break; 439 } 440 if (acb2) 441 ; 442 else if (acb->chain.tqe_next) { 443 TAILQ_REMOVE(&sc->ready_list, acb, chain); 444 --sc->sc_active; 445 } else { 446 printf("%s: can't find matching acb\n", 447 sc->sc_dev.dv_xname); 448 #ifdef DDB 449 /* Debugger(); */ 450 #endif 451 } 452 SIOP_TRACE('d','n',stat,0); 453 } 454 /* Put it on the free list. */ 455 acb->flags = ACB_FREE; 456 TAILQ_INSERT_HEAD(&sc->free_list, acb, chain); 457 458 sc->sc_tinfo[slp->target].cmds++; 459 460 scsi_done(xs); 461 462 if (dosched && sc->sc_nexus == NULL) 463 siop_sched(sc); 464 } 465 466 void 467 siopabort(sc, rp, where) 468 register struct siop_softc *sc; 469 siop_regmap_p rp; 470 char *where; 471 { 472 int i; 473 474 printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n", 475 sc->sc_dev.dv_xname, 476 where, rp->siop_dstat, rp->siop_sstat0, rp->siop_sbcl); 477 478 if (sc->sc_active > 0) { 479 #ifdef TODO 480 SET_SBIC_cmd (rp, SBIC_CMD_ABORT); 481 WAIT_CIP (rp); 482 483 GET_SBIC_asr (rp, asr); 484 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) 485 { 486 /* ok, get more drastic.. */ 487 488 SET_SBIC_cmd (rp, SBIC_CMD_RESET); 489 delay(25); 490 SBIC_WAIT(rp, SBIC_ASR_INT, 0); 491 GET_SBIC_csr (rp, csr); /* clears interrupt also */ 492 493 return; 494 } 495 496 do 497 { 498 SBIC_WAIT (rp, SBIC_ASR_INT, 0); 499 GET_SBIC_csr (rp, csr); 500 } 501 while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 502 && (csr != SBIC_CSR_CMD_INVALID)); 503 #endif 504 505 /* lets just hope it worked.. */ 506 #ifdef fix_this 507 for (i = 0; i < 2; ++i) { 508 if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] != 509 sc->sc_cur) { 510 printf ("siopabort: cleanup!\n"); 511 sc->sc_iob[i].sc_xs = NULL; 512 } 513 } 514 #endif /* fix_this */ 515 /* sc->sc_active = 0; */ 516 } 517 } 518 519 void 520 siopinitialize(sc) 521 struct siop_softc *sc; 522 { 523 int i; 524 u_int inhibit_sync; 525 extern u_long scsi_nosync; 526 extern int shift_nosync; 527 528 /* 529 * Need to check that scripts is on a long word boundary 530 * and that DS is on a long word boundary. 531 * Also should verify that dev doesn't span non-contiguous 532 * physical pages. 533 */ 534 sc->sc_scriptspa = kvtop(scripts); 535 sc->sc_tcp[1] = 1000 / sc->sc_clock_freq; 536 sc->sc_tcp[2] = 1500 / sc->sc_clock_freq; 537 sc->sc_tcp[3] = 2000 / sc->sc_clock_freq; 538 sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */ 539 if (sc->sc_minsync < 25) 540 sc->sc_minsync = 25; 541 if (sc->sc_clock_freq <= 25) { 542 sc->sc_dcntl = 0x80; /* SCLK/1 */ 543 sc->sc_tcp[0] = sc->sc_tcp[1]; 544 } else if (sc->sc_clock_freq <= 37) { 545 sc->sc_dcntl = 0x40; /* SCLK/1.5 */ 546 sc->sc_tcp[0] = sc->sc_tcp[2]; 547 } else if (sc->sc_clock_freq <= 50) { 548 sc->sc_dcntl = 0x00; /* SCLK/2 */ 549 sc->sc_tcp[0] = sc->sc_tcp[3]; 550 } else { 551 sc->sc_dcntl = 0xc0; /* SCLK/3 */ 552 sc->sc_tcp[0] = 3000 / sc->sc_clock_freq; 553 } 554 555 if (scsi_nosync) { 556 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff; 557 shift_nosync += 8; 558 #ifdef DEBUG 559 if (inhibit_sync) 560 printf("%s: Inhibiting synchronous transfer %02x\n", 561 sc->sc_dev.dv_xname, inhibit_sync); 562 #endif 563 for (i = 0; i < 8; ++i) 564 if (inhibit_sync & (1 << i)) 565 siop_inhibit_sync[i] = 1; 566 } 567 568 siopreset (sc); 569 } 570 571 void 572 siopreset(sc) 573 struct siop_softc *sc; 574 { 575 siop_regmap_p rp; 576 u_int i, s; 577 u_char dummy; 578 struct siop_acb *acb; 579 580 rp = sc->sc_siopp; 581 582 if (sc->sc_flags & SIOP_ALIVE) 583 siopabort(sc, rp, "reset"); 584 585 printf("%s: ", sc->sc_dev.dv_xname); /* XXXX */ 586 587 s = splbio(); 588 589 /* 590 * Reset the chip 591 * XXX - is this really needed? 592 */ 593 rp->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */ 594 rp->siop_istat |= SIOP_ISTAT_RST; /* reset chip */ 595 rp->siop_istat &= ~SIOP_ISTAT_RST; 596 /* 597 * Reset SCSI bus (do we really want this?) 598 */ 599 rp->siop_sien = 0; 600 rp->siop_scntl1 |= SIOP_SCNTL1_RST; 601 delay(1); 602 rp->siop_scntl1 &= ~SIOP_SCNTL1_RST; 603 604 /* 605 * Set up various chip parameters 606 */ 607 rp->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG; 608 rp->siop_scntl1 = SIOP_SCNTL1_ESR; 609 rp->siop_dcntl = sc->sc_dcntl; 610 rp->siop_dmode = 0x80; /* burst length = 4 */ 611 rp->siop_sien = 0x00; /* don't enable interrupts yet */ 612 rp->siop_dien = 0x00; /* don't enable interrupts yet */ 613 rp->siop_scid = 1 << sc->sc_link.adapter_target; 614 rp->siop_dwt = 0x00; 615 rp->siop_ctest0 |= SIOP_CTEST0_BTD | SIOP_CTEST0_EAN; 616 rp->siop_ctest7 |= sc->sc_ctest7; 617 618 /* will need to re-negotiate sync xfers */ 619 bzero(&sc->sc_sync, sizeof (sc->sc_sync)); 620 621 i = rp->siop_istat; 622 if (i & SIOP_ISTAT_SIP) 623 dummy = rp->siop_sstat0; 624 if (i & SIOP_ISTAT_DIP) 625 dummy = rp->siop_dstat; 626 627 splx (s); 628 629 delay (siop_reset_delay * 1000); 630 printf("siop id %d reset V%d\n", sc->sc_link.adapter_target, 631 rp->siop_ctest8 >> 4); 632 633 if ((sc->sc_flags & SIOP_ALIVE) == 0) { 634 TAILQ_INIT(&sc->ready_list); 635 TAILQ_INIT(&sc->nexus_list); 636 TAILQ_INIT(&sc->free_list); 637 sc->sc_nexus = NULL; 638 acb = sc->sc_acb; 639 bzero(acb, sizeof(sc->sc_acb)); 640 for (i = 0; i < sizeof(sc->sc_acb) / sizeof(*acb); i++) { 641 TAILQ_INSERT_TAIL(&sc->free_list, acb, chain); 642 acb++; 643 } 644 bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo)); 645 } else { 646 if (sc->sc_nexus != NULL) { 647 sc->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 648 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 649 } 650 while (acb = sc->nexus_list.tqh_first) { 651 acb->xs->error = XS_DRIVER_STUFFUP; 652 siop_scsidone(acb, acb->stat[0]); 653 } 654 } 655 656 sc->sc_flags |= SIOP_ALIVE; 657 sc->sc_flags &= ~(SIOP_INTDEFER|SIOP_INTSOFF); 658 /* enable SCSI and DMA interrupts */ 659 sc->sc_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE | 660 SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR; 661 sc->sc_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR | 662 /*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID; 663 rp->siop_sien = sc->sc_sien; 664 rp->siop_dien = sc->sc_dien; 665 } 666 667 /* 668 * Setup Data Storage for 53C710 and start SCRIPTS processing 669 */ 670 671 void 672 siop_start (sc, target, lun, cbuf, clen, buf, len) 673 struct siop_softc *sc; 674 int target; 675 int lun; 676 u_char *cbuf; 677 int clen; 678 u_char *buf; 679 int len; 680 { 681 siop_regmap_p rp = sc->sc_siopp; 682 int i; 683 int nchain; 684 int count, tcount; 685 char *addr, *dmaend; 686 struct siop_acb *acb = sc->sc_nexus; 687 688 #ifdef DEBUG 689 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 690 printf ("ACK! siop was busy: rp %x script %x dsa %x active %d\n", 691 rp, &scripts, &acb->ds, sc->sc_active); 692 printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n", 693 rp->siop_istat, rp->siop_sfbr, rp->siop_lcrc, 694 rp->siop_sien, rp->siop_dien); 695 #ifdef DDB 696 /*Debugger();*/ 697 #endif 698 } 699 #endif 700 acb->msgout[0] = MSG_IDENTIFY | lun; 701 if (siop_allow_disc[target] & 2 || 702 (siop_allow_disc[target] && len == 0)) 703 acb->msgout[0] = MSG_IDENTIFY_DR | lun; 704 acb->status = 0; 705 acb->stat[0] = -1; 706 acb->msg[0] = -1; 707 acb->ds.scsi_addr = (0x10000 << target) | (sc->sc_sync[target].sxfer << 8); 708 acb->ds.idlen = 1; 709 acb->ds.idbuf = (char *) kvtop(&acb->msgout[0]); 710 acb->ds.cmdlen = clen; 711 acb->ds.cmdbuf = (char *) kvtop(cbuf); 712 acb->ds.stslen = 1; 713 acb->ds.stsbuf = (char *) kvtop(&acb->stat[0]); 714 acb->ds.msglen = 1; 715 acb->ds.msgbuf = (char *) kvtop(&acb->msg[0]); 716 acb->msg[1] = -1; 717 acb->ds.msginlen = 1; 718 acb->ds.extmsglen = 1; 719 acb->ds.synmsglen = 3; 720 acb->ds.msginbuf = (char *) kvtop(&acb->msg[1]); 721 acb->ds.extmsgbuf = (char *) kvtop(&acb->msg[2]); 722 acb->ds.synmsgbuf = (char *) kvtop(&acb->msg[3]); 723 bzero(&acb->ds.chain, sizeof (acb->ds.chain)); 724 725 if (sc->sc_sync[target].state == SYNC_START) { 726 if (siop_inhibit_sync[target]) { 727 sc->sc_sync[target].state = SYNC_DONE; 728 sc->sc_sync[target].sbcl = 0; 729 sc->sc_sync[target].sxfer = 0; 730 #ifdef DEBUG 731 if (siopsync_debug) 732 printf ("Forcing target %d asynchronous\n", target); 733 #endif 734 } 735 else { 736 acb->msg[2] = -1; 737 acb->msgout[1] = MSG_EXT_MESSAGE; 738 acb->msgout[2] = 3; 739 acb->msgout[3] = MSG_SYNC_REQ; 740 #ifdef MAXTOR_SYNC_KLUDGE 741 acb->msgout[4] = 50 / 4; /* ask for ridiculous period */ 742 #else 743 acb->msgout[4] = sc->sc_minsync; 744 #endif 745 acb->msgout[5] = SIOP_MAX_OFFSET; 746 acb->ds.idlen = 6; 747 sc->sc_sync[target].state = SYNC_SENT; 748 #ifdef DEBUG 749 if (siopsync_debug) 750 printf ("Sending sync request to target %d\n", target); 751 #endif 752 } 753 } 754 755 /* 756 * Build physical DMA addresses for scatter/gather I/O 757 */ 758 acb->iob_buf = buf; 759 acb->iob_len = len; 760 acb->iob_curbuf = acb->iob_curlen = 0; 761 nchain = 0; 762 count = len; 763 addr = buf; 764 dmaend = NULL; 765 while (count > 0) { 766 acb->ds.chain[nchain].databuf = (char *) kvtop (addr); 767 if (count < (tcount = NBPG - ((int) addr & PGOFSET))) 768 tcount = count; 769 acb->ds.chain[nchain].datalen = tcount; 770 addr += tcount; 771 count -= tcount; 772 if (acb->ds.chain[nchain].databuf == dmaend) { 773 dmaend += acb->ds.chain[nchain].datalen; 774 acb->ds.chain[nchain].datalen = 0; 775 acb->ds.chain[--nchain].datalen += tcount; 776 #ifdef DEBUG 777 ++siopdma_hits; 778 #endif 779 } 780 else { 781 dmaend = acb->ds.chain[nchain].databuf + 782 acb->ds.chain[nchain].datalen; 783 acb->ds.chain[nchain].datalen = tcount; 784 #ifdef DEBUG 785 if (nchain) /* Don't count miss on first one */ 786 ++siopdma_misses; 787 #endif 788 } 789 ++nchain; 790 } 791 #ifdef DEBUG 792 if (nchain != 1 && len != 0 && siop_debug & 3) { 793 printf ("DMA chaining set: %d\n", nchain); 794 for (i = 0; i < nchain; ++i) { 795 printf (" [%d] %8x %4x\n", i, acb->ds.chain[i].databuf, 796 acb->ds.chain[i].datalen); 797 } 798 } 799 #endif 800 801 /* push data cache for all data the 53c710 needs to access */ 802 dma_cachectl (sc, sizeof (struct siop_softc)); 803 dma_cachectl (cbuf, clen); 804 if (buf != NULL && len != 0) 805 dma_cachectl (buf, len); 806 #ifdef DEBUG 807 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 808 printf ("ACK! siop was busy at start: rp %x script %x dsa %x active %d\n", 809 rp, &scripts, &acb->ds, sc->sc_active); 810 #ifdef DDB 811 /*Debugger();*/ 812 #endif 813 } 814 #endif 815 if (sc->nexus_list.tqh_first == NULL) { 816 if (rp->siop_istat & SIOP_ISTAT_CON) 817 printf("%s: siop_select while connected?\n", 818 sc->sc_dev.dv_xname); 819 rp->siop_temp = 0; 820 rp->siop_sbcl = sc->sc_sync[target].sbcl; 821 rp->siop_dsa = kvtop(&acb->ds); 822 rp->siop_dsp = sc->sc_scriptspa; 823 SIOP_TRACE('s',1,0,0) 824 } else { 825 if ((rp->siop_istat & SIOP_ISTAT_CON) == 0) { 826 rp->siop_istat = SIOP_ISTAT_SIGP; 827 SIOP_TRACE('s',2,0,0); 828 } 829 else { 830 SIOP_TRACE('s',3,rp->siop_istat,0); 831 } 832 } 833 #ifdef DEBUG 834 ++siopstarts; 835 #endif 836 } 837 838 /* 839 * Process a DMA or SCSI interrupt from the 53C710 SIOP 840 */ 841 842 int 843 siop_checkintr(sc, istat, dstat, sstat0, status) 844 struct siop_softc *sc; 845 u_char istat; 846 u_char dstat; 847 u_char sstat0; 848 int *status; 849 { 850 siop_regmap_p rp = sc->sc_siopp; 851 struct siop_acb *acb = sc->sc_nexus; 852 int target; 853 int dfifo, dbc, sstat1; 854 855 dfifo = rp->siop_dfifo; 856 dbc = rp->siop_dbc0; 857 sstat1 = rp->siop_sstat1; 858 rp->siop_ctest8 |= SIOP_CTEST8_CLF; 859 while ((rp->siop_ctest1 & SIOP_CTEST1_FMT) != SIOP_CTEST1_FMT) 860 ; 861 rp->siop_ctest8 &= ~SIOP_CTEST8_CLF; 862 #ifdef DEBUG 863 ++siopints; 864 #if 0 865 if (siop_debug & 0x100) { 866 DCIAS(&acb->stat[0]); /* XXX */ 867 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 868 istat, dstat, sstat0, rp->siop_dsps, rp->siop_sbcl, acb->stat[0], acb->msg[0]); 869 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 870 acb->msg[0], acb->msg[1], acb->msg[2], 871 acb->msg[3], acb->msg[4], acb->msg[5]); 872 } 873 #endif 874 if (rp->siop_dsp && (rp->siop_dsp < sc->sc_scriptspa || 875 rp->siop_dsp >= sc->sc_scriptspa + sizeof(scripts))) { 876 printf ("%s: dsp not within script dsp %x scripts %x:%x", 877 sc->sc_dev.dv_xname, rp->siop_dsp, sc->sc_scriptspa, 878 sc->sc_scriptspa + sizeof(scripts)); 879 printf(" istat %x dstat %x sstat0 %x\n", 880 istat, dstat, sstat0); 881 Debugger(); 882 } 883 #endif 884 SIOP_TRACE('i',dstat,istat,(istat&SIOP_ISTAT_DIP)?rp->siop_dsps&0xff:sstat0); 885 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff00) { 886 /* Normal completion status, or check condition */ 887 #ifdef DEBUG 888 if (rp->siop_dsa != kvtop(&acb->ds)) { 889 printf ("siop: invalid dsa: %x %x\n", rp->siop_dsa, 890 kvtop(&acb->ds)); 891 panic("*** siop DSA invalid ***"); 892 } 893 #endif 894 target = acb->xs->sc_link->target; 895 if (sc->sc_sync[target].state == SYNC_SENT) { 896 #ifdef DEBUG 897 if (siopsync_debug) 898 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 899 acb->msg[0], acb->msg[1], acb->msg[2], 900 acb->msg[3], acb->msg[4], acb->msg[5]); 901 #endif 902 if (acb->msg[1] == 0xff) 903 printf ("%s: target %d ignored sync request\n", 904 sc->sc_dev.dv_xname, target); 905 else if (acb->msg[1] == MSG_REJECT) 906 printf ("%s: target %d rejected sync request\n", 907 sc->sc_dev.dv_xname, target); 908 sc->sc_sync[target].state = SYNC_DONE; 909 sc->sc_sync[target].sxfer = 0; 910 sc->sc_sync[target].sbcl = 0; 911 if (acb->msg[2] == 3 && 912 acb->msg[3] == MSG_SYNC_REQ && 913 acb->msg[5] != 0) { 914 #ifdef MAXTOR_KLUDGE 915 /* 916 * Kludge for my Maxtor XT8580S 917 * It accepts whatever we request, even 918 * though it won't work. So we ask for 919 * a short period than we can handle. If 920 * the device says it can do it, use 208ns. 921 * If the device says it can do less than 922 * 100ns, then we limit it to 100ns. 923 */ 924 if (acb->msg[4] && acb->msg[4] < 100 / 4) { 925 #ifdef DEBUG 926 printf ("%d: target %d wanted %dns period\n", 927 sc->sc_dev.dv_xname, target, 928 acb->msg[4] * 4); 929 #endif 930 if (acb->msg[4] == 50 / 4) 931 acb->msg[4] = 208 / 4; 932 else 933 acb->msg[4] = 100 / 4; 934 } 935 #endif /* MAXTOR_KLUDGE */ 936 printf ("%s: target %d now synchronous, period=%dns, offset=%d\n", 937 sc->sc_dev.dv_xname, target, 938 acb->msg[4] * 4, acb->msg[5]); 939 scsi_period_to_siop (sc, target); 940 } 941 } 942 dma_cachectl(&acb->stat[0], 1); 943 *status = acb->stat[0]; 944 #ifdef DEBUG 945 if (rp->siop_sbcl & SIOP_BSY) { 946 /*printf ("ACK! siop was busy at end: rp %x script %x dsa %x\n", 947 rp, &scripts, &acb->ds);*/ 948 #ifdef DDB 949 /*Debugger();*/ 950 #endif 951 } 952 if (acb->msg[0] != 0x00) 953 printf("%s: message was not COMMAND COMPLETE: %x\n", 954 sc->sc_dev.dv_xname, acb->msg[0]); 955 #endif 956 if (sc->nexus_list.tqh_first) 957 rp->siop_dcntl |= SIOP_DCNTL_STD; 958 return 1; 959 } 960 if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */ 961 #ifdef DEBUG 962 ++siopphmm; 963 if (acb == NULL) 964 printf("%s: Phase mismatch with no active command?\n", 965 sc->sc_dev.dv_xname); 966 #endif 967 if (acb->iob_len) { 968 int adjust; 969 adjust = ((dfifo - (dbc & 0x7f)) & 0x7f); 970 if (sstat1 & SIOP_SSTAT1_ORF) 971 ++adjust; 972 if (sstat1 & SIOP_SSTAT1_OLF) 973 ++adjust; 974 acb->iob_curlen = *((long *)&rp->siop_dcmd) & 0xffffff; 975 acb->iob_curlen += adjust; 976 acb->iob_curbuf = *((long *)&rp->siop_dnad) - adjust; 977 #ifdef DEBUG 978 if (siop_debug & 0x100) { 979 int i; 980 printf ("Phase mismatch: curbuf %x curlen %x dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %x\n", 981 acb->iob_curbuf, acb->iob_curlen, dfifo, 982 dbc, sstat1, adjust, rp->siop_sbcl, siopstarts, acb); 983 if (acb->ds.chain[1].datalen) { 984 for (i = 0; acb->ds.chain[i].datalen; ++i) 985 printf("chain[%d] addr %x len %x\n", 986 i, acb->ds.chain[i].databuf, 987 acb->ds.chain[i].datalen); 988 } 989 } 990 #endif 991 dma_cachectl (acb, sizeof(*acb)); 992 } 993 #ifdef DEBUG 994 SIOP_TRACE('m',rp->siop_sbcl,(rp->siop_dsp>>8),rp->siop_dsp); 995 if (siop_debug & 9) 996 printf ("Phase mismatch: %x dsp +%x dcmd %x\n", 997 rp->siop_sbcl, 998 rp->siop_dsp - sc->sc_scriptspa, 999 *((long *)&rp->siop_dcmd)); 1000 #endif 1001 if ((rp->siop_sbcl & SIOP_REQ) == 0) { 1002 printf ("Phase mismatch: REQ not asserted! %02x dsp %x\n", 1003 rp->siop_sbcl, rp->siop_dsp); 1004 #ifdef DEBUG 1005 Debugger(); 1006 #endif 1007 } 1008 switch (rp->siop_sbcl & 7) { 1009 case 0: /* data out */ 1010 case 1: /* data in */ 1011 case 2: /* status */ 1012 case 3: /* command */ 1013 case 6: /* message in */ 1014 case 7: /* message out */ 1015 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1016 break; 1017 default: 1018 goto bad_phase; 1019 } 1020 return 0; 1021 } 1022 if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */ 1023 #ifdef DEBUG 1024 if (acb == NULL) 1025 printf("%s: Select timeout with no active command?\n", 1026 sc->sc_dev.dv_xname); 1027 if (rp->siop_sbcl & SIOP_BSY) { 1028 printf ("ACK! siop was busy at timeout: rp %x script %x dsa %x\n", 1029 rp, &scripts, &acb->ds); 1030 printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n", 1031 rp->siop_sbcl, rp->siop_sdid, istat, dstat, sstat0); 1032 if (!(rp->siop_sbcl & SIOP_BSY)) { 1033 printf ("Yikes, it's not busy now!\n"); 1034 #if 0 1035 *status = -1; 1036 if (sc->nexus_list.tqh_first) 1037 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1038 return 1; 1039 #endif 1040 } 1041 /* rp->siop_dcntl |= SIOP_DCNTL_STD;*/ 1042 return (0); 1043 #ifdef DDB 1044 Debugger(); 1045 #endif 1046 } 1047 #endif 1048 *status = -1; 1049 acb->xs->error = XS_SELTIMEOUT; 1050 if (sc->nexus_list.tqh_first) 1051 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1052 return 1; 1053 } 1054 if (acb) 1055 target = acb->xs->sc_link->target; 1056 else 1057 target = 7; 1058 if (sstat0 & SIOP_SSTAT0_UDC) { 1059 #ifdef DEBUG 1060 if (acb == NULL) 1061 printf("%s: Unexpected disconnect with no active command?\n", 1062 sc->sc_dev.dv_xname); 1063 printf ("%s: target %d disconnected unexpectedly\n", 1064 sc->sc_dev.dv_xname, target); 1065 #endif 1066 #if 0 1067 siopabort (sc, rp, "siopchkintr"); 1068 #endif 1069 *status = STS_BUSY; 1070 if (sc->nexus_list.tqh_first) 1071 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1072 return 1; 1073 } 1074 if (dstat & SIOP_DSTAT_SIR && (rp->siop_dsps == 0xff01 || 1075 rp->siop_dsps == 0xff02)) { 1076 #ifdef DEBUG 1077 if (siop_debug & 0x100) 1078 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", 1079 sc->sc_dev.dv_xname, 1 << target, rp->siop_temp, 1080 rp->siop_temp ? rp->siop_temp - sc->sc_scriptspa : 0, 1081 acb->iob_curbuf, acb->iob_curlen, 1082 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, siopstarts, acb); 1083 #endif 1084 if (acb == NULL) { 1085 printf("%s: Disconnect with no active command?\n", 1086 sc->sc_dev.dv_xname); 1087 return (0); 1088 } 1089 /* 1090 * XXXX need to update iob_curbuf/iob_curlen to reflect 1091 * current data transferred. If device disconnected in 1092 * the middle of a DMA block, they should already be set 1093 * by the phase change interrupt. If the disconnect 1094 * occurs on a DMA block boundary, we have to figure out 1095 * which DMA block it was. 1096 */ 1097 if (acb->iob_len && rp->siop_temp) { 1098 int n = rp->siop_temp - sc->sc_scriptspa; 1099 1100 if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen) 1101 printf("%s: iob_curbuf/len already set? n %x iob %x/%x chain[0] %x/%x\n", 1102 sc->sc_dev.dv_xname, n, acb->iob_curbuf, acb->iob_curlen, 1103 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen); 1104 if (n < Ent_datain) 1105 n = (n - Ent_dataout) / 16; 1106 else 1107 n = (n - Ent_datain) / 16; 1108 if (n <= 0 && n > DMAMAXIO) 1109 printf("TEMP invalid %d\n", n); 1110 else { 1111 acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf; 1112 acb->iob_curlen = acb->ds.chain[n].datalen; 1113 } 1114 #ifdef DEBUG 1115 if (siop_debug & 0x100) { 1116 printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n); 1117 printf(" curbuf %x curlen %x\n", acb->iob_curbuf, 1118 acb->iob_curlen); 1119 } 1120 #endif 1121 } 1122 /* 1123 * If data transfer was interrupted by disconnect, iob_curbuf 1124 * and iob_curlen should reflect the point of interruption. 1125 * Adjust the DMA chain so that the data transfer begins 1126 * at the appropriate place upon reselection. 1127 * XXX This should only be done on save data pointer message? 1128 */ 1129 if (acb->iob_curlen) { 1130 int i, j; 1131 1132 #ifdef DEBUG 1133 if (siop_debug & 0x100) 1134 printf ("%s: adjusting DMA chain\n", 1135 sc->sc_dev.dv_xname); 1136 if (rp->siop_dsps == 0xff02) 1137 printf ("%s: ID %02x disconnected without Save Data Pointers\n", 1138 sc->sc_dev.dv_xname, 1 << target); 1139 #endif 1140 for (i = 0; i < DMAMAXIO; ++i) { 1141 if (acb->ds.chain[i].datalen == 0) 1142 break; 1143 if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf && 1144 acb->iob_curbuf < (long)(acb->ds.chain[i].databuf + 1145 acb->ds.chain[i].datalen)) 1146 break; 1147 } 1148 if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0) 1149 printf("couldn't find saved data pointer\n"); 1150 #ifdef DEBUG 1151 if (siop_debug & 0x100) 1152 printf(" chain[0]: %x/%x -> %x/%x\n", 1153 acb->ds.chain[0].databuf, 1154 acb->ds.chain[0].datalen, 1155 acb->iob_curbuf, 1156 acb->iob_curlen); 1157 #endif 1158 acb->ds.chain[0].databuf = (char *)acb->iob_curbuf; 1159 acb->ds.chain[0].datalen = acb->iob_curlen; 1160 for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) { 1161 #ifdef DEBUG 1162 if (siop_debug & 0x100) 1163 printf(" chain[%d]: %x/%x -> %x/%x\n", j, 1164 acb->ds.chain[j].databuf, 1165 acb->ds.chain[j].datalen, 1166 acb->ds.chain[i].databuf, 1167 acb->ds.chain[i].datalen); 1168 #endif 1169 acb->ds.chain[j].databuf = acb->ds.chain[i].databuf; 1170 acb->ds.chain[j].datalen = acb->ds.chain[i].datalen; 1171 } 1172 if (j < DMAMAXIO) 1173 acb->ds.chain[j].datalen = 0; 1174 DCIAS(kvtop(&acb->ds.chain)); 1175 } 1176 ++sc->sc_tinfo[target].dconns; 1177 /* 1178 * add nexus to waiting list 1179 * clear nexus 1180 * try to start another command for another target/lun 1181 */ 1182 acb->status = sc->sc_flags & SIOP_INTSOFF; 1183 TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain); 1184 sc->sc_nexus = NULL; /* no current device */ 1185 /* start script to wait for reselect */ 1186 if (sc->sc_nexus == NULL) 1187 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1188 /* XXXX start another command ? */ 1189 if (sc->ready_list.tqh_first) 1190 siop_sched(sc); 1191 return (0); 1192 } 1193 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff03) { 1194 int reselid = rp->siop_scratch & 0x7f; 1195 int reselun = rp->siop_sfbr & 0x07; 1196 1197 sc->sc_sstat1 = rp->siop_sbcl; /* XXXX save current SBCL */ 1198 #ifdef DEBUG 1199 if (siop_debug & 0x100) 1200 printf ("%s: target ID %02x reselected dsps %x\n", 1201 sc->sc_dev.dv_xname, reselid, 1202 rp->siop_dsps); 1203 if ((rp->siop_sfbr & 0x80) == 0) 1204 printf("%s: Reselect message in was not identify: %x\n", 1205 sc->sc_dev.dv_xname, rp->siop_sfbr); 1206 #endif 1207 if (sc->sc_nexus) { 1208 #ifdef DEBUG 1209 if (siop_debug & 0x100) 1210 printf ("%s: reselect ID %02x w/active\n", 1211 sc->sc_dev.dv_xname, reselid); 1212 #endif 1213 TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain); 1214 sc->sc_tinfo[sc->sc_nexus->xs->sc_link->target].lubusy 1215 &= ~(1 << sc->sc_nexus->xs->sc_link->lun); 1216 --sc->sc_active; 1217 } 1218 /* 1219 * locate acb of reselecting device 1220 * set sc->sc_nexus to acb 1221 */ 1222 for (acb = sc->nexus_list.tqh_first; acb; 1223 acb = acb->chain.tqe_next) { 1224 if (reselid != (acb->ds.scsi_addr >> 16) || 1225 reselun != (acb->msgout[0] & 0x07)) 1226 continue; 1227 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 1228 sc->sc_nexus = acb; 1229 sc->sc_flags |= acb->status; 1230 acb->status = 0; 1231 DCIAS(kvtop(&acb->stat[0])); 1232 rp->siop_dsa = kvtop(&acb->ds); 1233 rp->siop_sxfer = sc->sc_sync[acb->xs->sc_link->target].sxfer; 1234 rp->siop_sbcl = sc->sc_sync[acb->xs->sc_link->target].sbcl; 1235 break; 1236 } 1237 if (acb == NULL) { 1238 printf("%s: target ID %02x reselect nexus_list %x\n", 1239 sc->sc_dev.dv_xname, reselid, 1240 sc->nexus_list.tqh_first); 1241 panic("unable to find reselecting device"); 1242 } 1243 dma_cachectl (acb, sizeof(*acb)); 1244 rp->siop_temp = 0; 1245 rp->siop_dcntl |= SIOP_DCNTL_STD; 1246 return (0); 1247 } 1248 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff04) { 1249 u_short ctest2 = rp->siop_ctest2; 1250 1251 /* reselect was interrupted (by Sig_P or select) */ 1252 #ifdef DEBUG 1253 if (siop_debug & 0x100 || 1254 (ctest2 & SIOP_CTEST2_SIGP) == 0) 1255 printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x istat %x/%x\n", 1256 sc->sc_dev.dv_xname, rp->siop_scntl1, 1257 ctest2, rp->siop_sfbr, istat, rp->siop_istat); 1258 #endif 1259 /* XXX assumes it was not select */ 1260 if (sc->sc_nexus == NULL) { 1261 printf("%s: reselect interrupted, sc_nexus == NULL\n", 1262 sc->sc_dev.dv_xname); 1263 #if 0 1264 siop_dump(sc); 1265 #ifdef DDB 1266 Debugger(); 1267 #endif 1268 #endif 1269 rp->siop_dcntl |= SIOP_DCNTL_STD; 1270 return(0); 1271 } 1272 target = sc->sc_nexus->xs->sc_link->target; 1273 rp->siop_temp = 0; 1274 rp->siop_dsa = kvtop(&sc->sc_nexus->ds); 1275 rp->siop_sxfer = sc->sc_sync[target].sxfer; 1276 rp->siop_sbcl = sc->sc_sync[target].sbcl; 1277 rp->siop_dsp = sc->sc_scriptspa; 1278 return (0); 1279 } 1280 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff06) { 1281 if (acb == NULL) 1282 printf("%s: Bad message-in with no active command?\n", 1283 sc->sc_dev.dv_xname); 1284 /* Unrecognized message in byte */ 1285 dma_cachectl (&acb->msg[1],1); 1286 printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n", 1287 sc->sc_dev.dv_xname, rp->siop_sfbr, acb->msg[1], rp->siop_sbcl); 1288 /* what should be done here? */ 1289 DCIAS(kvtop(&acb->msg[1])); 1290 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1291 return (0); 1292 } 1293 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0a) { 1294 /* Status phase wasn't followed by message in phase? */ 1295 printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n", 1296 sc->sc_dev.dv_xname, rp->siop_sbcl, rp->siop_sbdl); 1297 if (rp->siop_sbcl == 0xa7) { 1298 /* It is now, just continue the script? */ 1299 rp->siop_dcntl |= SIOP_DCNTL_STD; 1300 return (0); 1301 } 1302 } 1303 if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) { 1304 dma_cachectl (&acb->stat[0], 1); 1305 dma_cachectl (&acb->msg[0], 1); 1306 printf ("SIOP interrupt: %x sts %x msg %x %x sbcl %x\n", 1307 rp->siop_dsps, acb->stat[0], acb->msg[0], acb->msg[1], 1308 rp->siop_sbcl); 1309 siopreset (sc); 1310 *status = -1; 1311 return 0; /* siopreset has cleaned up */ 1312 } 1313 if (sstat0 & SIOP_SSTAT0_SGE) 1314 printf ("SIOP: SCSI Gross Error\n"); 1315 if (sstat0 & SIOP_SSTAT0_PAR) 1316 printf ("SIOP: Parity Error\n"); 1317 if (dstat & SIOP_DSTAT_IID) 1318 printf ("SIOP: Invalid instruction detected\n"); 1319 bad_phase: 1320 /* 1321 * temporary panic for unhandled conditions 1322 * displays various things about the 53C710 status and registers 1323 * then panics. 1324 * XXXX need to clean this up to print out the info, reset, and continue 1325 */ 1326 printf ("siopchkintr: target %x ds %x\n", target, &acb->ds); 1327 printf ("scripts %x ds %x rp %x dsp %x dcmd %x\n", sc->sc_scriptspa, 1328 kvtop(&acb->ds), kvtop(rp), rp->siop_dsp, 1329 *((long *)&rp->siop_dcmd)); 1330 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x dsa %x sbcl %x sts %x msg %x %x sfbr %x\n", 1331 istat, dstat, sstat0, rp->siop_dsps, rp->siop_dsa, 1332 rp->siop_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->siop_sfbr); 1333 #ifdef DEBUG 1334 if (siop_debug & 0x20) 1335 panic("siopchkintr: **** temp ****"); 1336 #endif 1337 #ifdef DDB 1338 Debugger (); 1339 #endif 1340 siopreset (sc); /* hard reset */ 1341 *status = -1; 1342 return 0; /* siopreset cleaned up */ 1343 } 1344 1345 void 1346 siop_select(sc) 1347 struct siop_softc *sc; 1348 { 1349 siop_regmap_p rp; 1350 struct siop_acb *acb = sc->sc_nexus; 1351 1352 #ifdef DEBUG 1353 if (siop_debug & 1) 1354 printf ("%s: select ", sc->sc_dev.dv_xname); 1355 #endif 1356 1357 rp = sc->sc_siopp; 1358 if (acb->xs->flags & SCSI_POLL || siop_no_dma) { 1359 sc->sc_flags |= SIOP_INTSOFF; 1360 sc->sc_flags &= ~SIOP_INTDEFER; 1361 if ((rp->siop_istat & 0x08) == 0) { 1362 rp->siop_sien = 0; 1363 rp->siop_dien = 0; 1364 } 1365 #if 0 1366 } else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 1367 sc->sc_flags &= ~SIOP_INTSOFF; 1368 if ((rp->siop_istat & 0x08) == 0) { 1369 rp->siop_sien = sc->sc_sien; 1370 rp->siop_dien = sc->sc_dien; 1371 } 1372 #endif 1373 } 1374 #ifdef DEBUG 1375 if (siop_debug & 1) 1376 printf ("siop_select: target %x cmd %02x ds %x\n", 1377 acb->xs->sc_link->target, acb->cmd.opcode, 1378 &sc->sc_nexus->ds); 1379 #endif 1380 1381 siop_start(sc, acb->xs->sc_link->target, acb->xs->sc_link->lun, 1382 &acb->cmd, acb->clen, acb->daddr, acb->dleft); 1383 1384 return; 1385 } 1386 1387 /* 1388 * 53C710 interrupt handler 1389 */ 1390 1391 int 1392 siopintr (sc) 1393 register struct siop_softc *sc; 1394 { 1395 siop_regmap_p rp; 1396 register u_char istat, dstat, sstat0; 1397 int status; 1398 int s = splbio(); 1399 1400 istat = sc->sc_istat; 1401 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 1402 splx(s); 1403 return; 1404 } 1405 1406 /* Got a valid interrupt on this device */ 1407 rp = sc->sc_siopp; 1408 dstat = sc->sc_dstat; 1409 sstat0 = sc->sc_sstat0; 1410 if (dstat & SIOP_DSTAT_SIR) 1411 sc->sc_intcode = rp->siop_dsps; 1412 sc->sc_istat = 0; 1413 #ifdef DEBUG 1414 if (siop_debug & 1) 1415 printf ("%s: intr istat %x dstat %x sstat0 %x\n", 1416 sc->sc_dev.dv_xname, istat, dstat, sstat0); 1417 if (!sc->sc_active) { 1418 printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x status %x\n", 1419 sc->sc_dev.dv_xname, istat, dstat, sstat0, sc->sc_nexus->stat[0]); 1420 } 1421 #endif 1422 1423 #ifdef DEBUG 1424 if (siop_debug & 5) { 1425 DCIAS(kvtop(&sc->sc_nexus->stat[0])); 1426 printf ("%s: intr istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 1427 sc->sc_dev.dv_xname, istat, dstat, sstat0, 1428 rp->siop_dsps, rp->siop_sbcl, 1429 sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]); 1430 } 1431 #endif 1432 if (sc->sc_flags & SIOP_INTDEFER) { 1433 sc->sc_flags &= ~(SIOP_INTDEFER | SIOP_INTSOFF); 1434 rp->siop_sien = sc->sc_sien; 1435 rp->siop_dien = sc->sc_dien; 1436 } 1437 if (siop_checkintr (sc, istat, dstat, sstat0, &status)) { 1438 #if 1 1439 if (status == 0xff) 1440 printf ("siopintr: status == 0xff\n"); 1441 #endif 1442 if ((sc->sc_flags & (SIOP_INTSOFF | SIOP_INTDEFER)) != SIOP_INTSOFF) { 1443 #if 0 1444 if (rp->siop_sbcl & SIOP_BSY) { 1445 printf ("%s: SCSI bus busy at completion", 1446 sc->sc_dev.dv_xname); 1447 printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n", 1448 sc->sc_nexus->xs->sc_link->target, 1449 rp->siop_sbcl, rp->siop_sfbr, rp->siop_lcrc, 1450 rp->siop_dsp - sc->sc_scriptspa); 1451 } 1452 #endif 1453 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 1454 } 1455 } 1456 splx(s); 1457 } 1458 1459 /* 1460 * This is based on the Progressive Peripherals 33Mhz Zeus driver and will 1461 * not be correct for other 53c710 boards. 1462 * 1463 */ 1464 scsi_period_to_siop (sc, target) 1465 struct siop_softc *sc; 1466 { 1467 int period, offset, i, sxfer, sbcl; 1468 1469 period = sc->sc_nexus->msg[4]; 1470 offset = sc->sc_nexus->msg[5]; 1471 #ifdef DEBUG 1472 sxfer = 0; 1473 if (offset <= SIOP_MAX_OFFSET) 1474 sxfer = offset; 1475 for (i = 0; i < sizeof (sync_tab) / 2; ++i) { 1476 if (period <= sync_tab[i].p) { 1477 sxfer |= sync_tab[i].r & 0x70; 1478 sbcl = sync_tab[i].r & 0x03; 1479 break; 1480 } 1481 } 1482 printf ("siop sync old: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1483 #endif 1484 for (sbcl = 1; sbcl < 4; ++sbcl) { 1485 sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3; 1486 if (sxfer >= 0 && sxfer <= 7) 1487 break; 1488 } 1489 if (sbcl > 3) { 1490 printf("siop sync: unable to compute sync params for period %dns\n", 1491 period * 4); 1492 /* 1493 * XXX need to pick a value we can do and renegotiate 1494 */ 1495 sxfer = sbcl = 0; 1496 } else { 1497 sxfer = (sxfer << 4) | ((offset <= SIOP_MAX_OFFSET) ? 1498 offset : SIOP_MAX_OFFSET); 1499 printf("siop sync: params for period %dns: sxfer %x sbcl %x", 1500 period * 4, sxfer, sbcl); 1501 printf(" actual period %dns\n", 1502 sc->sc_tcp[sbcl] * ((sxfer >> 4) + 4)); 1503 } 1504 sc->sc_sync[target].sxfer = sxfer; 1505 sc->sc_sync[target].sbcl = sbcl; 1506 #ifdef DEBUG 1507 printf ("siop sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1508 #endif 1509 } 1510 1511 #ifdef DEBUG 1512 1513 #if SIOP_TRACE_SIZE 1514 void 1515 siop_dump_trace() 1516 { 1517 int i; 1518 1519 printf("siop trace: next index %d\n", siop_trix); 1520 i = siop_trix; 1521 do { 1522 printf("%3d: '%c' %02x %02x %02x\n", i, siop_trbuf[i], 1523 siop_trbuf[i + 1], siop_trbuf[i + 2], siop_trbuf[i + 3]); 1524 i = (i + 4) & (SIOP_TRACE_SIZE - 1); 1525 } while (i != siop_trix); 1526 } 1527 #endif 1528 1529 void 1530 siop_dump_acb(acb) 1531 struct siop_acb *acb; 1532 { 1533 u_char *b = (u_char *) &acb->cmd; 1534 int i; 1535 1536 printf("acb@%x ", acb); 1537 if (acb->xs == NULL) { 1538 printf("<unused>\n"); 1539 return; 1540 } 1541 printf("(%d:%d) flags %2x clen %2d cmd ", acb->xs->sc_link->target, 1542 acb->xs->sc_link->lun, acb->flags, acb->clen); 1543 for (i = acb->clen; i; --i) 1544 printf(" %02x", *b++); 1545 printf("\n"); 1546 printf(" xs: %08x data %8x:%04x ", acb->xs, acb->xs->data, 1547 acb->xs->datalen); 1548 printf("va %8x:%04x ", acb->iob_buf, acb->iob_len); 1549 printf("cur %8x:%04x\n", acb->iob_curbuf, acb->iob_curlen); 1550 } 1551 1552 void 1553 siop_dump(sc) 1554 struct siop_softc *sc; 1555 { 1556 struct siop_acb *acb; 1557 siop_regmap_p rp = sc->sc_siopp; 1558 int s; 1559 int i; 1560 1561 s = splbio(); 1562 #if SIOP_TRACE_SIZE 1563 siop_dump_trace(); 1564 #endif 1565 printf("%s@%x regs %x istat %x\n", 1566 sc->sc_dev.dv_xname, sc, rp, rp->siop_istat); 1567 if (acb = sc->free_list.tqh_first) { 1568 printf("Free list:\n"); 1569 while (acb) { 1570 siop_dump_acb(acb); 1571 acb = acb->chain.tqe_next; 1572 } 1573 } 1574 if (acb = sc->ready_list.tqh_first) { 1575 printf("Ready list:\n"); 1576 while (acb) { 1577 siop_dump_acb(acb); 1578 acb = acb->chain.tqe_next; 1579 } 1580 } 1581 if (acb = sc->nexus_list.tqh_first) { 1582 printf("Nexus list:\n"); 1583 while (acb) { 1584 siop_dump_acb(acb); 1585 acb = acb->chain.tqe_next; 1586 } 1587 } 1588 if (sc->sc_nexus) { 1589 printf("Nexus:\n"); 1590 siop_dump_acb(sc->sc_nexus); 1591 } 1592 for (i = 0; i < 8; ++i) { 1593 if (sc->sc_tinfo[i].cmds > 2) { 1594 printf("tgt %d: cmds %d disc %d senses %d lubusy %x\n", 1595 i, sc->sc_tinfo[i].cmds, 1596 sc->sc_tinfo[i].dconns, 1597 sc->sc_tinfo[i].senses, 1598 sc->sc_tinfo[i].lubusy); 1599 } 1600 } 1601 splx(s); 1602 } 1603 #endif 1604
Indexes created Wed Sep 24 22:09:59 GMT 2025