siop.c revision 1.24
1 /* $NetBSD: siop.c,v 1.24 1995/09/16 16:11:29 chopps 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 (((struct device *)(slp->device_softc))->dv_unit < dk_ndrive) 369 ++dk_xfer[((struct device *)(slp->device_softc))->dv_unit]; 370 /* 371 * is this right? 372 */ 373 xs->status = stat; 374 375 if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) { 376 if (stat == SCSI_CHECK) { 377 struct scsi_sense *ss = (void *)&acb->cmd; 378 bzero(ss, sizeof(*ss)); 379 ss->opcode = REQUEST_SENSE; 380 ss->byte2 = slp->lun << 5; 381 ss->length = sizeof(struct scsi_sense_data); 382 acb->clen = sizeof(*ss); 383 acb->daddr = (char *)&xs->sense; 384 acb->dleft = sizeof(struct scsi_sense_data); 385 acb->flags = ACB_ACTIVE | ACB_CHKSENSE; 386 TAILQ_INSERT_HEAD(&sc->ready_list, acb, chain); 387 --sc->sc_active; 388 sc->sc_tinfo[slp->target].lubusy &= 389 ~(1 << slp->lun); 390 sc->sc_tinfo[slp->target].senses++; 391 if (sc->sc_nexus == acb) { 392 sc->sc_nexus = NULL; 393 siop_sched(sc); 394 } 395 SIOP_TRACE('d','s',0,0) 396 return; 397 } 398 } 399 if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) { 400 xs->error = XS_SENSE; 401 } else { 402 xs->resid = 0; /* XXXX */ 403 } 404 #if whataboutthisone 405 case SCSI_BUSY: 406 xs->error = XS_BUSY; 407 break; 408 #endif 409 xs->flags |= ITSDONE; 410 411 /* 412 * Remove the ACB from whatever queue it's on. We have to do a bit of 413 * a hack to figure out which queue it's on. Note that it is *not* 414 * necessary to cdr down the ready queue, but we must cdr down the 415 * nexus queue and see if it's there, so we can mark the unit as no 416 * longer busy. This code is sickening, but it works. 417 */ 418 if (acb == sc->sc_nexus) { 419 sc->sc_nexus = NULL; 420 sc->sc_tinfo[slp->target].lubusy &= ~(1<<slp->lun); 421 if (sc->ready_list.tqh_first) 422 dosched = 1; /* start next command */ 423 --sc->sc_active; 424 SIOP_TRACE('d','a',stat,0) 425 } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) { 426 TAILQ_REMOVE(&sc->ready_list, acb, chain); 427 SIOP_TRACE('d','r',stat,0) 428 } else { 429 register struct siop_acb *acb2; 430 for (acb2 = sc->nexus_list.tqh_first; acb2; 431 acb2 = acb2->chain.tqe_next) 432 if (acb2 == acb) { 433 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 434 sc->sc_tinfo[slp->target].lubusy 435 &= ~(1<<slp->lun); 436 --sc->sc_active; 437 break; 438 } 439 if (acb2) 440 ; 441 else if (acb->chain.tqe_next) { 442 TAILQ_REMOVE(&sc->ready_list, acb, chain); 443 --sc->sc_active; 444 } else { 445 printf("%s: can't find matching acb\n", 446 sc->sc_dev.dv_xname); 447 #ifdef DDB 448 /* Debugger(); */ 449 #endif 450 } 451 SIOP_TRACE('d','n',stat,0); 452 } 453 /* Put it on the free list. */ 454 acb->flags = ACB_FREE; 455 TAILQ_INSERT_HEAD(&sc->free_list, acb, chain); 456 457 sc->sc_tinfo[slp->target].cmds++; 458 459 scsi_done(xs); 460 461 if (dosched && sc->sc_nexus == NULL) 462 siop_sched(sc); 463 } 464 465 void 466 siopabort(sc, rp, where) 467 register struct siop_softc *sc; 468 siop_regmap_p rp; 469 char *where; 470 { 471 int i; 472 473 printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n", 474 sc->sc_dev.dv_xname, 475 where, rp->siop_dstat, rp->siop_sstat0, rp->siop_sbcl); 476 477 if (sc->sc_active > 0) { 478 #ifdef TODO 479 SET_SBIC_cmd (rp, SBIC_CMD_ABORT); 480 WAIT_CIP (rp); 481 482 GET_SBIC_asr (rp, asr); 483 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) 484 { 485 /* ok, get more drastic.. */ 486 487 SET_SBIC_cmd (rp, SBIC_CMD_RESET); 488 delay(25); 489 SBIC_WAIT(rp, SBIC_ASR_INT, 0); 490 GET_SBIC_csr (rp, csr); /* clears interrupt also */ 491 492 return; 493 } 494 495 do 496 { 497 SBIC_WAIT (rp, SBIC_ASR_INT, 0); 498 GET_SBIC_csr (rp, csr); 499 } 500 while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 501 && (csr != SBIC_CSR_CMD_INVALID)); 502 #endif 503 504 /* lets just hope it worked.. */ 505 #ifdef fix_this 506 for (i = 0; i < 2; ++i) { 507 if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] != 508 sc->sc_cur) { 509 printf ("siopabort: cleanup!\n"); 510 sc->sc_iob[i].sc_xs = NULL; 511 } 512 } 513 #endif /* fix_this */ 514 /* sc->sc_active = 0; */ 515 } 516 } 517 518 void 519 siopinitialize(sc) 520 struct siop_softc *sc; 521 { 522 /* 523 * Need to check that scripts is on a long word boundary 524 * and that DS is on a long word boundary. 525 * Also should verify that dev doesn't span non-contiguous 526 * physical pages. 527 */ 528 sc->sc_scriptspa = kvtop(scripts); 529 sc->sc_tcp[1] = 1000 / sc->sc_clock_freq; 530 sc->sc_tcp[2] = 1500 / sc->sc_clock_freq; 531 sc->sc_tcp[3] = 2000 / sc->sc_clock_freq; 532 sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */ 533 if (sc->sc_minsync < 25) 534 sc->sc_minsync = 25; 535 if (sc->sc_clock_freq <= 25) { 536 sc->sc_dcntl = 0x80; /* SCLK/1 */ 537 sc->sc_tcp[0] = sc->sc_tcp[1]; 538 } else if (sc->sc_clock_freq <= 37) { 539 sc->sc_dcntl = 0x40; /* SCLK/1.5 */ 540 sc->sc_tcp[0] = sc->sc_tcp[2]; 541 } else if (sc->sc_clock_freq <= 50) { 542 sc->sc_dcntl = 0x00; /* SCLK/2 */ 543 sc->sc_tcp[0] = sc->sc_tcp[3]; 544 } else { 545 sc->sc_dcntl = 0xc0; /* SCLK/3 */ 546 sc->sc_tcp[0] = 3000 / sc->sc_clock_freq; 547 } 548 549 siopreset (sc); 550 } 551 552 void 553 siopreset(sc) 554 struct siop_softc *sc; 555 { 556 siop_regmap_p rp; 557 u_int i, s; 558 u_char dummy; 559 struct siop_acb *acb; 560 561 rp = sc->sc_siopp; 562 563 if (sc->sc_flags & SIOP_ALIVE) 564 siopabort(sc, rp, "reset"); 565 566 printf("%s: ", sc->sc_dev.dv_xname); /* XXXX */ 567 568 s = splbio(); 569 570 /* 571 * Reset the chip 572 * XXX - is this really needed? 573 */ 574 rp->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */ 575 rp->siop_istat |= SIOP_ISTAT_RST; /* reset chip */ 576 rp->siop_istat &= ~SIOP_ISTAT_RST; 577 /* 578 * Reset SCSI bus (do we really want this?) 579 */ 580 rp->siop_sien = 0; 581 rp->siop_scntl1 |= SIOP_SCNTL1_RST; 582 delay(1); 583 rp->siop_scntl1 &= ~SIOP_SCNTL1_RST; 584 585 /* 586 * Set up various chip parameters 587 */ 588 rp->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG; 589 rp->siop_scntl1 = SIOP_SCNTL1_ESR; 590 rp->siop_dcntl = sc->sc_dcntl; 591 rp->siop_dmode = 0x80; /* burst length = 4 */ 592 rp->siop_sien = 0x00; /* don't enable interrupts yet */ 593 rp->siop_dien = 0x00; /* don't enable interrupts yet */ 594 rp->siop_scid = 1 << sc->sc_link.adapter_target; 595 rp->siop_dwt = 0x00; 596 rp->siop_ctest0 |= SIOP_CTEST0_BTD | SIOP_CTEST0_EAN; 597 rp->siop_ctest7 |= sc->sc_ctest7; 598 599 /* will need to re-negotiate sync xfers */ 600 bzero(&sc->sc_sync, sizeof (sc->sc_sync)); 601 602 i = rp->siop_istat; 603 if (i & SIOP_ISTAT_SIP) 604 dummy = rp->siop_sstat0; 605 if (i & SIOP_ISTAT_DIP) 606 dummy = rp->siop_dstat; 607 608 splx (s); 609 610 delay (siop_reset_delay * 1000); 611 printf("siop id %d reset V%d\n", sc->sc_link.adapter_target, 612 rp->siop_ctest8 >> 4); 613 614 if ((sc->sc_flags & SIOP_ALIVE) == 0) { 615 TAILQ_INIT(&sc->ready_list); 616 TAILQ_INIT(&sc->nexus_list); 617 TAILQ_INIT(&sc->free_list); 618 sc->sc_nexus = NULL; 619 acb = sc->sc_acb; 620 bzero(acb, sizeof(sc->sc_acb)); 621 for (i = 0; i < sizeof(sc->sc_acb) / sizeof(*acb); i++) { 622 TAILQ_INSERT_TAIL(&sc->free_list, acb, chain); 623 acb++; 624 } 625 bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo)); 626 } else { 627 if (sc->sc_nexus != NULL) { 628 sc->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 629 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 630 } 631 while (acb = sc->nexus_list.tqh_first) { 632 acb->xs->error = XS_DRIVER_STUFFUP; 633 siop_scsidone(acb, acb->stat[0]); 634 } 635 } 636 637 sc->sc_flags |= SIOP_ALIVE; 638 sc->sc_flags &= ~(SIOP_INTDEFER|SIOP_INTSOFF); 639 /* enable SCSI and DMA interrupts */ 640 sc->sc_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE | 641 SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR; 642 sc->sc_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR | 643 /*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID; 644 rp->siop_sien = sc->sc_sien; 645 rp->siop_dien = sc->sc_dien; 646 } 647 648 /* 649 * Setup Data Storage for 53C710 and start SCRIPTS processing 650 */ 651 652 void 653 siop_start (sc, target, lun, cbuf, clen, buf, len) 654 struct siop_softc *sc; 655 int target; 656 int lun; 657 u_char *cbuf; 658 int clen; 659 u_char *buf; 660 int len; 661 { 662 siop_regmap_p rp = sc->sc_siopp; 663 int i; 664 int nchain; 665 int count, tcount; 666 char *addr, *dmaend; 667 struct siop_acb *acb = sc->sc_nexus; 668 669 #ifdef DEBUG 670 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 671 printf ("ACK! siop was busy: rp %x script %x dsa %x active %d\n", 672 rp, &scripts, &acb->ds, sc->sc_active); 673 printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n", 674 rp->siop_istat, rp->siop_sfbr, rp->siop_lcrc, 675 rp->siop_sien, rp->siop_dien); 676 #ifdef DDB 677 /*Debugger();*/ 678 #endif 679 } 680 #endif 681 acb->msgout[0] = MSG_IDENTIFY | lun; 682 if (siop_allow_disc[target] & 2 || 683 (siop_allow_disc[target] && len == 0)) 684 acb->msgout[0] = MSG_IDENTIFY_DR | lun; 685 acb->status = 0; 686 acb->stat[0] = -1; 687 acb->msg[0] = -1; 688 acb->ds.scsi_addr = (0x10000 << target) | (sc->sc_sync[target].sxfer << 8); 689 acb->ds.idlen = 1; 690 acb->ds.idbuf = (char *) kvtop(&acb->msgout[0]); 691 acb->ds.cmdlen = clen; 692 acb->ds.cmdbuf = (char *) kvtop(cbuf); 693 acb->ds.stslen = 1; 694 acb->ds.stsbuf = (char *) kvtop(&acb->stat[0]); 695 acb->ds.msglen = 1; 696 acb->ds.msgbuf = (char *) kvtop(&acb->msg[0]); 697 acb->msg[1] = -1; 698 acb->ds.msginlen = 1; 699 acb->ds.extmsglen = 1; 700 acb->ds.synmsglen = 3; 701 acb->ds.msginbuf = (char *) kvtop(&acb->msg[1]); 702 acb->ds.extmsgbuf = (char *) kvtop(&acb->msg[2]); 703 acb->ds.synmsgbuf = (char *) kvtop(&acb->msg[3]); 704 bzero(&acb->ds.chain, sizeof (acb->ds.chain)); 705 706 if (sc->sc_sync[target].state == SYNC_START) { 707 if (siop_inhibit_sync[target]) { 708 sc->sc_sync[target].state = SYNC_DONE; 709 sc->sc_sync[target].sbcl = 0; 710 sc->sc_sync[target].sxfer = 0; 711 #ifdef DEBUG 712 if (siopsync_debug) 713 printf ("Forcing target %d asynchronous\n", target); 714 #endif 715 } 716 else { 717 acb->msg[2] = -1; 718 acb->msgout[1] = MSG_EXT_MESSAGE; 719 acb->msgout[2] = 3; 720 acb->msgout[3] = MSG_SYNC_REQ; 721 #ifdef MAXTOR_SYNC_KLUDGE 722 acb->msgout[4] = 50 / 4; /* ask for ridiculous period */ 723 #else 724 acb->msgout[4] = sc->sc_minsync; 725 #endif 726 acb->msgout[5] = SIOP_MAX_OFFSET; 727 acb->ds.idlen = 6; 728 sc->sc_sync[target].state = SYNC_SENT; 729 #ifdef DEBUG 730 if (siopsync_debug) 731 printf ("Sending sync request to target %d\n", target); 732 #endif 733 } 734 } 735 736 /* 737 * Build physical DMA addresses for scatter/gather I/O 738 */ 739 acb->iob_buf = buf; 740 acb->iob_len = len; 741 acb->iob_curbuf = acb->iob_curlen = 0; 742 nchain = 0; 743 count = len; 744 addr = buf; 745 dmaend = NULL; 746 while (count > 0) { 747 acb->ds.chain[nchain].databuf = (char *) kvtop (addr); 748 if (count < (tcount = NBPG - ((int) addr & PGOFSET))) 749 tcount = count; 750 acb->ds.chain[nchain].datalen = tcount; 751 addr += tcount; 752 count -= tcount; 753 if (acb->ds.chain[nchain].databuf == dmaend) { 754 dmaend += acb->ds.chain[nchain].datalen; 755 acb->ds.chain[nchain].datalen = 0; 756 acb->ds.chain[--nchain].datalen += tcount; 757 #ifdef DEBUG 758 ++siopdma_hits; 759 #endif 760 } 761 else { 762 dmaend = acb->ds.chain[nchain].databuf + 763 acb->ds.chain[nchain].datalen; 764 acb->ds.chain[nchain].datalen = tcount; 765 #ifdef DEBUG 766 if (nchain) /* Don't count miss on first one */ 767 ++siopdma_misses; 768 #endif 769 } 770 ++nchain; 771 } 772 #ifdef DEBUG 773 if (nchain != 1 && len != 0 && siop_debug & 3) { 774 printf ("DMA chaining set: %d\n", nchain); 775 for (i = 0; i < nchain; ++i) { 776 printf (" [%d] %8x %4x\n", i, acb->ds.chain[i].databuf, 777 acb->ds.chain[i].datalen); 778 } 779 } 780 #endif 781 782 /* push data cache for all data the 53c710 needs to access */ 783 dma_cachectl (sc, sizeof (struct siop_softc)); 784 dma_cachectl (cbuf, clen); 785 if (buf != NULL && len != 0) 786 dma_cachectl (buf, len); 787 #ifdef DEBUG 788 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 789 printf ("ACK! siop was busy at start: rp %x script %x dsa %x active %d\n", 790 rp, &scripts, &acb->ds, sc->sc_active); 791 #ifdef DDB 792 /*Debugger();*/ 793 #endif 794 } 795 #endif 796 if (sc->nexus_list.tqh_first == NULL) { 797 if (rp->siop_istat & SIOP_ISTAT_CON) 798 printf("%s: siop_select while connected?\n", 799 sc->sc_dev.dv_xname); 800 rp->siop_temp = 0; 801 rp->siop_sbcl = sc->sc_sync[target].sbcl; 802 rp->siop_dsa = kvtop(&acb->ds); 803 rp->siop_dsp = sc->sc_scriptspa; 804 SIOP_TRACE('s',1,0,0) 805 } else { 806 if ((rp->siop_istat & SIOP_ISTAT_CON) == 0) { 807 rp->siop_istat = SIOP_ISTAT_SIGP; 808 SIOP_TRACE('s',2,0,0); 809 } 810 else { 811 SIOP_TRACE('s',3,rp->siop_istat,0); 812 } 813 } 814 #ifdef DEBUG 815 ++siopstarts; 816 #endif 817 } 818 819 /* 820 * Process a DMA or SCSI interrupt from the 53C710 SIOP 821 */ 822 823 int 824 siop_checkintr(sc, istat, dstat, sstat0, status) 825 struct siop_softc *sc; 826 u_char istat; 827 u_char dstat; 828 u_char sstat0; 829 int *status; 830 { 831 siop_regmap_p rp = sc->sc_siopp; 832 struct siop_acb *acb = sc->sc_nexus; 833 int target; 834 int dfifo, dbc, sstat1; 835 836 dfifo = rp->siop_dfifo; 837 dbc = rp->siop_dbc0; 838 sstat1 = rp->siop_sstat1; 839 rp->siop_ctest8 |= SIOP_CTEST8_CLF; 840 while ((rp->siop_ctest1 & SIOP_CTEST1_FMT) != SIOP_CTEST1_FMT) 841 ; 842 rp->siop_ctest8 &= ~SIOP_CTEST8_CLF; 843 #ifdef DEBUG 844 ++siopints; 845 #if 0 846 if (siop_debug & 0x100) { 847 DCIAS(&acb->stat[0]); /* XXX */ 848 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 849 istat, dstat, sstat0, rp->siop_dsps, rp->siop_sbcl, acb->stat[0], acb->msg[0]); 850 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 851 acb->msg[0], acb->msg[1], acb->msg[2], 852 acb->msg[3], acb->msg[4], acb->msg[5]); 853 } 854 #endif 855 if (rp->siop_dsp && (rp->siop_dsp < sc->sc_scriptspa || 856 rp->siop_dsp >= sc->sc_scriptspa + sizeof(scripts))) { 857 printf ("%s: dsp not within script dsp %x scripts %x:%x", 858 sc->sc_dev.dv_xname, rp->siop_dsp, sc->sc_scriptspa, 859 sc->sc_scriptspa + sizeof(scripts)); 860 printf(" istat %x dstat %x sstat0 %x\n", 861 istat, dstat, sstat0); 862 Debugger(); 863 } 864 #endif 865 SIOP_TRACE('i',dstat,istat,(istat&SIOP_ISTAT_DIP)?rp->siop_dsps&0xff:sstat0); 866 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff00) { 867 /* Normal completion status, or check condition */ 868 #ifdef DEBUG 869 if (rp->siop_dsa != kvtop(&acb->ds)) { 870 printf ("siop: invalid dsa: %x %x\n", rp->siop_dsa, 871 kvtop(&acb->ds)); 872 panic("*** siop DSA invalid ***"); 873 } 874 #endif 875 target = acb->xs->sc_link->target; 876 if (sc->sc_sync[target].state == SYNC_SENT) { 877 #ifdef DEBUG 878 if (siopsync_debug) 879 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 880 acb->msg[0], acb->msg[1], acb->msg[2], 881 acb->msg[3], acb->msg[4], acb->msg[5]); 882 #endif 883 if (acb->msg[1] == 0xff) 884 printf ("%s: target %d ignored sync request\n", 885 sc->sc_dev.dv_xname, target); 886 else if (acb->msg[1] == MSG_REJECT) 887 printf ("%s: target %d rejected sync request\n", 888 sc->sc_dev.dv_xname, target); 889 sc->sc_sync[target].state = SYNC_DONE; 890 sc->sc_sync[target].sxfer = 0; 891 sc->sc_sync[target].sbcl = 0; 892 if (acb->msg[2] == 3 && 893 acb->msg[3] == MSG_SYNC_REQ && 894 acb->msg[5] != 0) { 895 #ifdef MAXTOR_KLUDGE 896 /* 897 * Kludge for my Maxtor XT8580S 898 * It accepts whatever we request, even 899 * though it won't work. So we ask for 900 * a short period than we can handle. If 901 * the device says it can do it, use 208ns. 902 * If the device says it can do less than 903 * 100ns, then we limit it to 100ns. 904 */ 905 if (acb->msg[4] && acb->msg[4] < 100 / 4) { 906 #ifdef DEBUG 907 printf ("%d: target %d wanted %dns period\n", 908 sc->sc_dev.dv_xname, target, 909 acb->msg[4] * 4); 910 #endif 911 if (acb->msg[4] == 50 / 4) 912 acb->msg[4] = 208 / 4; 913 else 914 acb->msg[4] = 100 / 4; 915 } 916 #endif /* MAXTOR_KLUDGE */ 917 printf ("%s: target %d now synchronous, period=%dns, offset=%d\n", 918 sc->sc_dev.dv_xname, target, 919 acb->msg[4] * 4, acb->msg[5]); 920 scsi_period_to_siop (sc, target); 921 } 922 } 923 dma_cachectl(&acb->stat[0], 1); 924 *status = acb->stat[0]; 925 #ifdef DEBUG 926 if (rp->siop_sbcl & SIOP_BSY) { 927 /*printf ("ACK! siop was busy at end: rp %x script %x dsa %x\n", 928 rp, &scripts, &acb->ds);*/ 929 #ifdef DDB 930 /*Debugger();*/ 931 #endif 932 } 933 if (acb->msg[0] != 0x00) 934 printf("%s: message was not COMMAND COMPLETE: %x\n", 935 sc->sc_dev.dv_xname, acb->msg[0]); 936 #endif 937 if (sc->nexus_list.tqh_first) 938 rp->siop_dcntl |= SIOP_DCNTL_STD; 939 return 1; 940 } 941 if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */ 942 #ifdef DEBUG 943 ++siopphmm; 944 if (acb == NULL) 945 printf("%s: Phase mismatch with no active command?\n", 946 sc->sc_dev.dv_xname); 947 #endif 948 if (acb->iob_len) { 949 int adjust; 950 adjust = ((dfifo - (dbc & 0x7f)) & 0x7f); 951 if (sstat1 & SIOP_SSTAT1_ORF) 952 ++adjust; 953 if (sstat1 & SIOP_SSTAT1_OLF) 954 ++adjust; 955 acb->iob_curlen = *((long *)&rp->siop_dcmd) & 0xffffff; 956 acb->iob_curlen += adjust; 957 acb->iob_curbuf = *((long *)&rp->siop_dnad) - adjust; 958 #ifdef DEBUG 959 if (siop_debug & 0x100) { 960 int i; 961 printf ("Phase mismatch: curbuf %x curlen %x dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %x\n", 962 acb->iob_curbuf, acb->iob_curlen, dfifo, 963 dbc, sstat1, adjust, rp->siop_sbcl, siopstarts, acb); 964 if (acb->ds.chain[1].datalen) { 965 for (i = 0; acb->ds.chain[i].datalen; ++i) 966 printf("chain[%d] addr %x len %x\n", 967 i, acb->ds.chain[i].databuf, 968 acb->ds.chain[i].datalen); 969 } 970 } 971 #endif 972 dma_cachectl (acb, sizeof(*acb)); 973 } 974 #ifdef DEBUG 975 SIOP_TRACE('m',rp->siop_sbcl,(rp->siop_dsp>>8),rp->siop_dsp); 976 if (siop_debug & 9) 977 printf ("Phase mismatch: %x dsp +%x dcmd %x\n", 978 rp->siop_sbcl, 979 rp->siop_dsp - sc->sc_scriptspa, 980 *((long *)&rp->siop_dcmd)); 981 #endif 982 if ((rp->siop_sbcl & SIOP_REQ) == 0) { 983 printf ("Phase mismatch: REQ not asserted! %02x dsp %x\n", 984 rp->siop_sbcl, rp->siop_dsp); 985 #ifdef DEBUG 986 Debugger(); 987 #endif 988 } 989 switch (rp->siop_sbcl & 7) { 990 case 0: /* data out */ 991 case 1: /* data in */ 992 case 2: /* status */ 993 case 3: /* command */ 994 case 6: /* message in */ 995 case 7: /* message out */ 996 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 997 break; 998 default: 999 goto bad_phase; 1000 } 1001 return 0; 1002 } 1003 if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */ 1004 #ifdef DEBUG 1005 if (acb == NULL) 1006 printf("%s: Select timeout with no active command?\n", 1007 sc->sc_dev.dv_xname); 1008 if (rp->siop_sbcl & SIOP_BSY) { 1009 printf ("ACK! siop was busy at timeout: rp %x script %x dsa %x\n", 1010 rp, &scripts, &acb->ds); 1011 printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n", 1012 rp->siop_sbcl, rp->siop_sdid, istat, dstat, sstat0); 1013 if (!(rp->siop_sbcl & SIOP_BSY)) { 1014 printf ("Yikes, it's not busy now!\n"); 1015 #if 0 1016 *status = -1; 1017 if (sc->nexus_list.tqh_first) 1018 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1019 return 1; 1020 #endif 1021 } 1022 /* rp->siop_dcntl |= SIOP_DCNTL_STD;*/ 1023 return (0); 1024 #ifdef DDB 1025 Debugger(); 1026 #endif 1027 } 1028 #endif 1029 *status = -1; 1030 acb->xs->error = XS_SELTIMEOUT; 1031 if (sc->nexus_list.tqh_first) 1032 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1033 return 1; 1034 } 1035 if (acb) 1036 target = acb->xs->sc_link->target; 1037 else 1038 target = 7; 1039 if (sstat0 & SIOP_SSTAT0_UDC) { 1040 #ifdef DEBUG 1041 if (acb == NULL) 1042 printf("%s: Unexpected disconnect with no active command?\n", 1043 sc->sc_dev.dv_xname); 1044 printf ("%s: target %d disconnected unexpectedly\n", 1045 sc->sc_dev.dv_xname, target); 1046 #endif 1047 #if 0 1048 siopabort (sc, rp, "siopchkintr"); 1049 #endif 1050 *status = STS_BUSY; 1051 if (sc->nexus_list.tqh_first) 1052 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1053 return 1; 1054 } 1055 if (dstat & SIOP_DSTAT_SIR && (rp->siop_dsps == 0xff01 || 1056 rp->siop_dsps == 0xff02)) { 1057 #ifdef DEBUG 1058 if (siop_debug & 0x100) 1059 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", 1060 sc->sc_dev.dv_xname, 1 << target, rp->siop_temp, 1061 rp->siop_temp ? rp->siop_temp - sc->sc_scriptspa : 0, 1062 acb->iob_curbuf, acb->iob_curlen, 1063 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, siopstarts, acb); 1064 #endif 1065 if (acb == NULL) { 1066 printf("%s: Disconnect with no active command?\n", 1067 sc->sc_dev.dv_xname); 1068 return (0); 1069 } 1070 /* 1071 * XXXX need to update iob_curbuf/iob_curlen to reflect 1072 * current data transferred. If device disconnected in 1073 * the middle of a DMA block, they should already be set 1074 * by the phase change interrupt. If the disconnect 1075 * occurs on a DMA block boundary, we have to figure out 1076 * which DMA block it was. 1077 */ 1078 if (acb->iob_len && rp->siop_temp) { 1079 int n = rp->siop_temp - sc->sc_scriptspa; 1080 1081 if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen) 1082 printf("%s: iob_curbuf/len already set? n %x iob %x/%x chain[0] %x/%x\n", 1083 sc->sc_dev.dv_xname, n, acb->iob_curbuf, acb->iob_curlen, 1084 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen); 1085 if (n < Ent_datain) 1086 n = (n - Ent_dataout) / 16; 1087 else 1088 n = (n - Ent_datain) / 16; 1089 if (n <= 0 && n > DMAMAXIO) 1090 printf("TEMP invalid %d\n", n); 1091 else { 1092 acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf; 1093 acb->iob_curlen = acb->ds.chain[n].datalen; 1094 } 1095 #ifdef DEBUG 1096 if (siop_debug & 0x100) { 1097 printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n); 1098 printf(" curbuf %x curlen %x\n", acb->iob_curbuf, 1099 acb->iob_curlen); 1100 } 1101 #endif 1102 } 1103 /* 1104 * If data transfer was interrupted by disconnect, iob_curbuf 1105 * and iob_curlen should reflect the point of interruption. 1106 * Adjust the DMA chain so that the data transfer begins 1107 * at the appropriate place upon reselection. 1108 * XXX This should only be done on save data pointer message? 1109 */ 1110 if (acb->iob_curlen) { 1111 int i, j; 1112 1113 #ifdef DEBUG 1114 if (siop_debug & 0x100) 1115 printf ("%s: adjusting DMA chain\n", 1116 sc->sc_dev.dv_xname); 1117 if (rp->siop_dsps == 0xff02) 1118 printf ("%s: ID %02x disconnected without Save Data Pointers\n", 1119 sc->sc_dev.dv_xname, 1 << target); 1120 #endif 1121 for (i = 0; i < DMAMAXIO; ++i) { 1122 if (acb->ds.chain[i].datalen == 0) 1123 break; 1124 if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf && 1125 acb->iob_curbuf < (long)(acb->ds.chain[i].databuf + 1126 acb->ds.chain[i].datalen)) 1127 break; 1128 } 1129 if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0) 1130 printf("couldn't find saved data pointer\n"); 1131 #ifdef DEBUG 1132 if (siop_debug & 0x100) 1133 printf(" chain[0]: %x/%x -> %x/%x\n", 1134 acb->ds.chain[0].databuf, 1135 acb->ds.chain[0].datalen, 1136 acb->iob_curbuf, 1137 acb->iob_curlen); 1138 #endif 1139 acb->ds.chain[0].databuf = (char *)acb->iob_curbuf; 1140 acb->ds.chain[0].datalen = acb->iob_curlen; 1141 for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) { 1142 #ifdef DEBUG 1143 if (siop_debug & 0x100) 1144 printf(" chain[%d]: %x/%x -> %x/%x\n", j, 1145 acb->ds.chain[j].databuf, 1146 acb->ds.chain[j].datalen, 1147 acb->ds.chain[i].databuf, 1148 acb->ds.chain[i].datalen); 1149 #endif 1150 acb->ds.chain[j].databuf = acb->ds.chain[i].databuf; 1151 acb->ds.chain[j].datalen = acb->ds.chain[i].datalen; 1152 } 1153 if (j < DMAMAXIO) 1154 acb->ds.chain[j].datalen = 0; 1155 DCIAS(kvtop(&acb->ds.chain)); 1156 } 1157 ++sc->sc_tinfo[target].dconns; 1158 /* 1159 * add nexus to waiting list 1160 * clear nexus 1161 * try to start another command for another target/lun 1162 */ 1163 acb->status = sc->sc_flags & SIOP_INTSOFF; 1164 TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain); 1165 sc->sc_nexus = NULL; /* no current device */ 1166 /* start script to wait for reselect */ 1167 if (sc->sc_nexus == NULL) 1168 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1169 /* XXXX start another command ? */ 1170 if (sc->ready_list.tqh_first) 1171 siop_sched(sc); 1172 return (0); 1173 } 1174 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff03) { 1175 int reselid = rp->siop_scratch & 0x7f; 1176 int reselun = rp->siop_sfbr & 0x07; 1177 1178 sc->sc_sstat1 = rp->siop_sbcl; /* XXXX save current SBCL */ 1179 #ifdef DEBUG 1180 if (siop_debug & 0x100) 1181 printf ("%s: target ID %02x reselected dsps %x\n", 1182 sc->sc_dev.dv_xname, reselid, 1183 rp->siop_dsps); 1184 if ((rp->siop_sfbr & 0x80) == 0) 1185 printf("%s: Reselect message in was not identify: %x\n", 1186 sc->sc_dev.dv_xname, rp->siop_sfbr); 1187 #endif 1188 if (sc->sc_nexus) { 1189 #ifdef DEBUG 1190 if (siop_debug & 0x100) 1191 printf ("%s: reselect ID %02x w/active\n", 1192 sc->sc_dev.dv_xname, reselid); 1193 #endif 1194 TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain); 1195 sc->sc_tinfo[sc->sc_nexus->xs->sc_link->target].lubusy 1196 &= ~(1 << sc->sc_nexus->xs->sc_link->lun); 1197 --sc->sc_active; 1198 } 1199 /* 1200 * locate acb of reselecting device 1201 * set sc->sc_nexus to acb 1202 */ 1203 for (acb = sc->nexus_list.tqh_first; acb; 1204 acb = acb->chain.tqe_next) { 1205 if (reselid != (acb->ds.scsi_addr >> 16) || 1206 reselun != (acb->msgout[0] & 0x07)) 1207 continue; 1208 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 1209 sc->sc_nexus = acb; 1210 sc->sc_flags |= acb->status; 1211 acb->status = 0; 1212 DCIAS(kvtop(&acb->stat[0])); 1213 rp->siop_dsa = kvtop(&acb->ds); 1214 rp->siop_sxfer = sc->sc_sync[acb->xs->sc_link->target].sxfer; 1215 rp->siop_sbcl = sc->sc_sync[acb->xs->sc_link->target].sbcl; 1216 break; 1217 } 1218 if (acb == NULL) { 1219 printf("%s: target ID %02x reselect nexus_list %x\n", 1220 sc->sc_dev.dv_xname, reselid, 1221 sc->nexus_list.tqh_first); 1222 panic("unable to find reselecting device"); 1223 } 1224 dma_cachectl (acb, sizeof(*acb)); 1225 rp->siop_temp = 0; 1226 rp->siop_dcntl |= SIOP_DCNTL_STD; 1227 return (0); 1228 } 1229 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff04) { 1230 u_short ctest2 = rp->siop_ctest2; 1231 1232 /* reselect was interrupted (by Sig_P or select) */ 1233 #ifdef DEBUG 1234 if (siop_debug & 0x100 || 1235 (ctest2 & SIOP_CTEST2_SIGP) == 0) 1236 printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x istat %x/%x\n", 1237 sc->sc_dev.dv_xname, rp->siop_scntl1, 1238 ctest2, rp->siop_sfbr, istat, rp->siop_istat); 1239 #endif 1240 /* XXX assumes it was not select */ 1241 if (sc->sc_nexus == NULL) { 1242 printf("%s: reselect interrupted, sc_nexus == NULL\n", 1243 sc->sc_dev.dv_xname); 1244 #if 0 1245 siop_dump(sc); 1246 #ifdef DDB 1247 Debugger(); 1248 #endif 1249 #endif 1250 rp->siop_dcntl |= SIOP_DCNTL_STD; 1251 return(0); 1252 } 1253 target = sc->sc_nexus->xs->sc_link->target; 1254 rp->siop_temp = 0; 1255 rp->siop_dsa = kvtop(&sc->sc_nexus->ds); 1256 rp->siop_sxfer = sc->sc_sync[target].sxfer; 1257 rp->siop_sbcl = sc->sc_sync[target].sbcl; 1258 rp->siop_dsp = sc->sc_scriptspa; 1259 return (0); 1260 } 1261 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff06) { 1262 if (acb == NULL) 1263 printf("%s: Bad message-in with no active command?\n", 1264 sc->sc_dev.dv_xname); 1265 /* Unrecognized message in byte */ 1266 dma_cachectl (&acb->msg[1],1); 1267 printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n", 1268 sc->sc_dev.dv_xname, rp->siop_sfbr, acb->msg[1], rp->siop_sbcl); 1269 /* what should be done here? */ 1270 DCIAS(kvtop(&acb->msg[1])); 1271 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1272 return (0); 1273 } 1274 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0a) { 1275 /* Status phase wasn't followed by message in phase? */ 1276 printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n", 1277 sc->sc_dev.dv_xname, rp->siop_sbcl, rp->siop_sbdl); 1278 if (rp->siop_sbcl == 0xa7) { 1279 /* It is now, just continue the script? */ 1280 rp->siop_dcntl |= SIOP_DCNTL_STD; 1281 return (0); 1282 } 1283 } 1284 if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) { 1285 dma_cachectl (&acb->stat[0], 1); 1286 dma_cachectl (&acb->msg[0], 1); 1287 printf ("SIOP interrupt: %x sts %x msg %x %x sbcl %x\n", 1288 rp->siop_dsps, acb->stat[0], acb->msg[0], acb->msg[1], 1289 rp->siop_sbcl); 1290 siopreset (sc); 1291 *status = -1; 1292 return 0; /* siopreset has cleaned up */ 1293 } 1294 if (sstat0 & SIOP_SSTAT0_SGE) 1295 printf ("SIOP: SCSI Gross Error\n"); 1296 if (sstat0 & SIOP_SSTAT0_PAR) 1297 printf ("SIOP: Parity Error\n"); 1298 if (dstat & SIOP_DSTAT_IID) 1299 printf ("SIOP: Invalid instruction detected\n"); 1300 bad_phase: 1301 /* 1302 * temporary panic for unhandled conditions 1303 * displays various things about the 53C710 status and registers 1304 * then panics. 1305 * XXXX need to clean this up to print out the info, reset, and continue 1306 */ 1307 printf ("siopchkintr: target %x ds %x\n", target, &acb->ds); 1308 printf ("scripts %x ds %x rp %x dsp %x dcmd %x\n", sc->sc_scriptspa, 1309 kvtop(&acb->ds), kvtop(rp), rp->siop_dsp, 1310 *((long *)&rp->siop_dcmd)); 1311 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x dsa %x sbcl %x sts %x msg %x %x sfbr %x\n", 1312 istat, dstat, sstat0, rp->siop_dsps, rp->siop_dsa, 1313 rp->siop_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->siop_sfbr); 1314 #ifdef DEBUG 1315 if (siop_debug & 0x20) 1316 panic("siopchkintr: **** temp ****"); 1317 #endif 1318 #ifdef DDB 1319 Debugger (); 1320 #endif 1321 siopreset (sc); /* hard reset */ 1322 *status = -1; 1323 return 0; /* siopreset cleaned up */ 1324 } 1325 1326 void 1327 siop_select(sc) 1328 struct siop_softc *sc; 1329 { 1330 siop_regmap_p rp; 1331 struct siop_acb *acb = sc->sc_nexus; 1332 1333 #ifdef DEBUG 1334 if (siop_debug & 1) 1335 printf ("%s: select ", sc->sc_dev.dv_xname); 1336 #endif 1337 1338 rp = sc->sc_siopp; 1339 if (acb->xs->flags & SCSI_POLL || siop_no_dma) { 1340 sc->sc_flags |= SIOP_INTSOFF; 1341 sc->sc_flags &= ~SIOP_INTDEFER; 1342 if ((rp->siop_istat & 0x08) == 0) { 1343 rp->siop_sien = 0; 1344 rp->siop_dien = 0; 1345 } 1346 #if 0 1347 } else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 1348 sc->sc_flags &= ~SIOP_INTSOFF; 1349 if ((rp->siop_istat & 0x08) == 0) { 1350 rp->siop_sien = sc->sc_sien; 1351 rp->siop_dien = sc->sc_dien; 1352 } 1353 #endif 1354 } 1355 #ifdef DEBUG 1356 if (siop_debug & 1) 1357 printf ("siop_select: target %x cmd %02x ds %x\n", 1358 acb->xs->sc_link->target, acb->cmd.opcode, 1359 &sc->sc_nexus->ds); 1360 #endif 1361 1362 siop_start(sc, acb->xs->sc_link->target, acb->xs->sc_link->lun, 1363 &acb->cmd, acb->clen, acb->daddr, acb->dleft); 1364 1365 return; 1366 } 1367 1368 /* 1369 * 53C710 interrupt handler 1370 */ 1371 1372 int 1373 siopintr (sc) 1374 register struct siop_softc *sc; 1375 { 1376 siop_regmap_p rp; 1377 register u_char istat, dstat, sstat0; 1378 int status; 1379 int s = splbio(); 1380 1381 istat = sc->sc_istat; 1382 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 1383 splx(s); 1384 return; 1385 } 1386 1387 /* Got a valid interrupt on this device */ 1388 rp = sc->sc_siopp; 1389 dstat = sc->sc_dstat; 1390 sstat0 = sc->sc_sstat0; 1391 if (dstat & SIOP_DSTAT_SIR) 1392 sc->sc_intcode = rp->siop_dsps; 1393 sc->sc_istat = 0; 1394 #ifdef DEBUG 1395 if (siop_debug & 1) 1396 printf ("%s: intr istat %x dstat %x sstat0 %x\n", 1397 sc->sc_dev.dv_xname, istat, dstat, sstat0); 1398 if (!sc->sc_active) { 1399 printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x status %x\n", 1400 sc->sc_dev.dv_xname, istat, dstat, sstat0, sc->sc_nexus->stat[0]); 1401 } 1402 #endif 1403 1404 #ifdef DEBUG 1405 if (siop_debug & 5) { 1406 DCIAS(kvtop(&sc->sc_nexus->stat[0])); 1407 printf ("%s: intr istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 1408 sc->sc_dev.dv_xname, istat, dstat, sstat0, 1409 rp->siop_dsps, rp->siop_sbcl, 1410 sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]); 1411 } 1412 #endif 1413 if (sc->sc_flags & SIOP_INTDEFER) { 1414 sc->sc_flags &= ~(SIOP_INTDEFER | SIOP_INTSOFF); 1415 rp->siop_sien = sc->sc_sien; 1416 rp->siop_dien = sc->sc_dien; 1417 } 1418 if (siop_checkintr (sc, istat, dstat, sstat0, &status)) { 1419 #if 1 1420 if (status == 0xff) 1421 printf ("siopintr: status == 0xff\n"); 1422 #endif 1423 if ((sc->sc_flags & (SIOP_INTSOFF | SIOP_INTDEFER)) != SIOP_INTSOFF) { 1424 #if 0 1425 if (rp->siop_sbcl & SIOP_BSY) { 1426 printf ("%s: SCSI bus busy at completion", 1427 sc->sc_dev.dv_xname); 1428 printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n", 1429 sc->sc_nexus->xs->sc_link->target, 1430 rp->siop_sbcl, rp->siop_sfbr, rp->siop_lcrc, 1431 rp->siop_dsp - sc->sc_scriptspa); 1432 } 1433 #endif 1434 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 1435 } 1436 } 1437 splx(s); 1438 } 1439 1440 /* 1441 * This is based on the Progressive Peripherals 33Mhz Zeus driver and will 1442 * not be correct for other 53c710 boards. 1443 * 1444 */ 1445 scsi_period_to_siop (sc, target) 1446 struct siop_softc *sc; 1447 { 1448 int period, offset, i, sxfer, sbcl; 1449 1450 period = sc->sc_nexus->msg[4]; 1451 offset = sc->sc_nexus->msg[5]; 1452 #ifdef DEBUG 1453 sxfer = 0; 1454 if (offset <= SIOP_MAX_OFFSET) 1455 sxfer = offset; 1456 for (i = 0; i < sizeof (sync_tab) / 2; ++i) { 1457 if (period <= sync_tab[i].p) { 1458 sxfer |= sync_tab[i].r & 0x70; 1459 sbcl = sync_tab[i].r & 0x03; 1460 break; 1461 } 1462 } 1463 printf ("siop sync old: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1464 #endif 1465 for (sbcl = 1; sbcl < 4; ++sbcl) { 1466 sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3; 1467 if (sxfer >= 0 && sxfer <= 7) 1468 break; 1469 } 1470 if (sbcl > 3) { 1471 printf("siop sync: unable to compute sync params for period %dns\n", 1472 period * 4); 1473 /* 1474 * XXX need to pick a value we can do and renegotiate 1475 */ 1476 sxfer = sbcl = 0; 1477 } else { 1478 sxfer = (sxfer << 4) | ((offset <= SIOP_MAX_OFFSET) ? 1479 offset : SIOP_MAX_OFFSET); 1480 printf("siop sync: params for period %dns: sxfer %x sbcl %x", 1481 period * 4, sxfer, sbcl); 1482 printf(" actual period %dns\n", 1483 sc->sc_tcp[sbcl] * ((sxfer >> 4) + 4)); 1484 } 1485 sc->sc_sync[target].sxfer = sxfer; 1486 sc->sc_sync[target].sbcl = sbcl; 1487 #ifdef DEBUG 1488 printf ("siop sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1489 #endif 1490 } 1491 1492 #ifdef DEBUG 1493 1494 #if SIOP_TRACE_SIZE 1495 void 1496 siop_dump_trace() 1497 { 1498 int i; 1499 1500 printf("siop trace: next index %d\n", siop_trix); 1501 i = siop_trix; 1502 do { 1503 printf("%3d: '%c' %02x %02x %02x\n", i, siop_trbuf[i], 1504 siop_trbuf[i + 1], siop_trbuf[i + 2], siop_trbuf[i + 3]); 1505 i = (i + 4) & (SIOP_TRACE_SIZE - 1); 1506 } while (i != siop_trix); 1507 } 1508 #endif 1509 1510 void 1511 siop_dump_acb(acb) 1512 struct siop_acb *acb; 1513 { 1514 u_char *b = (u_char *) &acb->cmd; 1515 int i; 1516 1517 printf("acb@%x ", acb); 1518 if (acb->xs == NULL) { 1519 printf("<unused>\n"); 1520 return; 1521 } 1522 printf("(%d:%d) flags %2x clen %2d cmd ", acb->xs->sc_link->target, 1523 acb->xs->sc_link->lun, acb->flags, acb->clen); 1524 for (i = acb->clen; i; --i) 1525 printf(" %02x", *b++); 1526 printf("\n"); 1527 printf(" xs: %08x data %8x:%04x ", acb->xs, acb->xs->data, 1528 acb->xs->datalen); 1529 printf("va %8x:%04x ", acb->iob_buf, acb->iob_len); 1530 printf("cur %8x:%04x\n", acb->iob_curbuf, acb->iob_curlen); 1531 } 1532 1533 void 1534 siop_dump(sc) 1535 struct siop_softc *sc; 1536 { 1537 struct siop_acb *acb; 1538 siop_regmap_p rp = sc->sc_siopp; 1539 int s; 1540 int i; 1541 1542 s = splbio(); 1543 #if SIOP_TRACE_SIZE 1544 siop_dump_trace(); 1545 #endif 1546 printf("%s@%x regs %x istat %x\n", 1547 sc->sc_dev.dv_xname, sc, rp, rp->siop_istat); 1548 if (acb = sc->free_list.tqh_first) { 1549 printf("Free list:\n"); 1550 while (acb) { 1551 siop_dump_acb(acb); 1552 acb = acb->chain.tqe_next; 1553 } 1554 } 1555 if (acb = sc->ready_list.tqh_first) { 1556 printf("Ready list:\n"); 1557 while (acb) { 1558 siop_dump_acb(acb); 1559 acb = acb->chain.tqe_next; 1560 } 1561 } 1562 if (acb = sc->nexus_list.tqh_first) { 1563 printf("Nexus list:\n"); 1564 while (acb) { 1565 siop_dump_acb(acb); 1566 acb = acb->chain.tqe_next; 1567 } 1568 } 1569 if (sc->sc_nexus) { 1570 printf("Nexus:\n"); 1571 siop_dump_acb(sc->sc_nexus); 1572 } 1573 for (i = 0; i < 8; ++i) { 1574 if (sc->sc_tinfo[i].cmds > 2) { 1575 printf("tgt %d: cmds %d disc %d senses %d lubusy %x\n", 1576 i, sc->sc_tinfo[i].cmds, 1577 sc->sc_tinfo[i].dconns, 1578 sc->sc_tinfo[i].senses, 1579 sc->sc_tinfo[i].lubusy); 1580 } 1581 } 1582 splx(s); 1583 } 1584 #endif 1585
Indexes created Wed Sep 24 05:09:52 GMT 2025