1 /* $NetBSD: siop.c,v 1.49 2003/06/18 08:58:36 drochner 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 "opt_ddb.h" 47 48 #include <sys/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: siop.c,v 1.49 2003/06/18 08:58:36 drochner Exp $"); 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/device.h> 54 #include <sys/disklabel.h> 55 #include <sys/buf.h> 56 #include <sys/malloc.h> 57 58 #include <uvm/uvm_extern.h> 59 60 #include <dev/scsipi/scsi_all.h> 61 #include <dev/scsipi/scsipi_all.h> 62 #include <dev/scsipi/scsiconf.h> 63 #include <machine/cpu.h> 64 #ifdef __m68k__ 65 #include <m68k/cacheops.h> 66 #endif 67 #include <amiga/amiga/custom.h> 68 #include <amiga/amiga/isr.h> 69 #include <amiga/dev/siopreg.h> 70 #include <amiga/dev/siopvar.h> 71 72 /* 73 * SCSI delays 74 * In u-seconds, primarily for state changes on the SPC. 75 */ 76 #define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */ 77 #define SCSI_DATA_WAIT 500000 /* wait per data in/out step */ 78 #define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */ 79 80 void siop_select(struct siop_softc *); 81 void siopabort(struct siop_softc *, siop_regmap_p, char *); 82 void sioperror(struct siop_softc *, siop_regmap_p, u_char); 83 void siopstart(struct siop_softc *); 84 int siop_checkintr(struct siop_softc *, u_char, u_char, u_char, int *); 85 void siopreset(struct siop_softc *); 86 void siopsetdelay(int); 87 void siop_scsidone(struct siop_acb *, int); 88 void siop_sched(struct siop_softc *); 89 void siop_poll(struct siop_softc *, struct siop_acb *); 90 void siopintr(struct siop_softc *); 91 void scsi_period_to_siop(struct siop_softc *, int); 92 void siop_start(struct siop_softc *, int, int, u_char *, int, u_char *, int); 93 void siop_dump_acb(struct siop_acb *); 94 95 /* 53C710 script */ 96 const 97 #include <amiga/dev/siop_script.out> 98 99 /* default to not inhibit sync negotiation on any drive */ 100 u_char siop_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */ 101 u_char siop_allow_disc[8] = {3, 3, 3, 3, 3, 3, 3, 3}; 102 int siop_no_dma = 0; 103 104 int siop_reset_delay = 250; /* delay after reset, in milleseconds */ 105 106 int siop_cmd_wait = SCSI_CMD_WAIT; 107 int siop_data_wait = SCSI_DATA_WAIT; 108 int siop_init_wait = SCSI_INIT_WAIT; 109 110 #ifdef DEBUG_SYNC 111 /* 112 * sync period transfer lookup - only valid for 66Mhz clock 113 */ 114 static struct { 115 unsigned char p; /* period from sync request message */ 116 unsigned char r; /* siop_period << 4 | sbcl */ 117 } sync_tab[] = { 118 { 60/4, 0<<4 | 1}, 119 { 76/4, 1<<4 | 1}, 120 { 92/4, 2<<4 | 1}, 121 { 92/4, 0<<4 | 2}, 122 {108/4, 3<<4 | 1}, 123 {116/4, 1<<4 | 2}, 124 {120/4, 4<<4 | 1}, 125 {120/4, 0<<4 | 3}, 126 {136/4, 5<<4 | 1}, 127 {140/4, 2<<4 | 2}, 128 {152/4, 6<<4 | 1}, 129 {152/4, 1<<4 | 3}, 130 {164/4, 3<<4 | 2}, 131 {168/4, 7<<4 | 1}, 132 {180/4, 2<<4 | 3}, 133 {184/4, 4<<4 | 2}, 134 {208/4, 5<<4 | 2}, 135 {212/4, 3<<4 | 3}, 136 {232/4, 6<<4 | 2}, 137 {240/4, 4<<4 | 3}, 138 {256/4, 7<<4 | 2}, 139 {272/4, 5<<4 | 3}, 140 {300/4, 6<<4 | 3}, 141 {332/4, 7<<4 | 3} 142 }; 143 #endif 144 145 #ifdef DEBUG 146 /* 147 * 0x01 - full debug 148 * 0x02 - DMA chaining 149 * 0x04 - siopintr 150 * 0x08 - phase mismatch 151 * 0x10 - <not used> 152 * 0x20 - panic on unhandled exceptions 153 * 0x100 - disconnect/reselect 154 */ 155 int siop_debug = 0; 156 int siopsync_debug = 0; 157 int siopdma_hits = 0; 158 int siopdma_misses = 0; 159 int siopchain_ints = 0; 160 int siopstarts = 0; 161 int siopints = 0; 162 int siopphmm = 0; 163 #define SIOP_TRACE_SIZE 128 164 #define SIOP_TRACE(a,b,c,d) \ 165 siop_trbuf[siop_trix] = (a); \ 166 siop_trbuf[siop_trix+1] = (b); \ 167 siop_trbuf[siop_trix+2] = (c); \ 168 siop_trbuf[siop_trix+3] = (d); \ 169 siop_trix = (siop_trix + 4) & (SIOP_TRACE_SIZE - 1); 170 u_char siop_trbuf[SIOP_TRACE_SIZE]; 171 int siop_trix; 172 void siop_dump(struct siop_softc *); 173 void siop_dump_trace(void); 174 #else 175 #define SIOP_TRACE(a,b,c,d) 176 #endif 177 178 179 /* 180 * default minphys routine for siop based controllers 181 */ 182 void 183 siop_minphys(struct buf *bp) 184 { 185 186 /* 187 * No max transfer at this level. 188 */ 189 minphys(bp); 190 } 191 192 /* 193 * used by specific siop controller 194 * 195 */ 196 void 197 siop_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 198 void *arg) 199 { 200 struct scsipi_xfer *xs; 201 struct scsipi_periph *periph; 202 struct siop_acb *acb; 203 struct siop_softc *sc = (void *)chan->chan_adapter->adapt_dev; 204 int flags, s; 205 206 switch (req) { 207 case ADAPTER_REQ_RUN_XFER: 208 xs = arg; 209 periph = xs->xs_periph; 210 flags = xs->xs_control; 211 212 /* XXXX ?? */ 213 if (flags & XS_CTL_DATA_UIO) 214 panic("siop: scsi data uio requested"); 215 216 /* XXXX ?? */ 217 if (sc->sc_nexus && flags & XS_CTL_POLL) 218 /* panic("siop_scsicmd: busy");*/ 219 printf("siop_scsicmd: busy\n"); 220 221 s = splbio(); 222 acb = sc->free_list.tqh_first; 223 if (acb) { 224 TAILQ_REMOVE(&sc->free_list, acb, chain); 225 } 226 splx(s); 227 228 #ifdef DIAGNOSTIC 229 /* 230 * This should never happen as we track the resources 231 * in the mid-layer. 232 */ 233 if (acb == NULL) { 234 scsipi_printaddr(periph); 235 printf("unable to allocate acb\n"); 236 panic("siop_scsipi_request"); 237 } 238 #endif 239 240 acb->flags = ACB_ACTIVE; 241 acb->xs = xs; 242 bcopy(xs->cmd, &acb->cmd, xs->cmdlen); 243 acb->clen = xs->cmdlen; 244 acb->daddr = xs->data; 245 acb->dleft = xs->datalen; 246 247 s = splbio(); 248 TAILQ_INSERT_TAIL(&sc->ready_list, acb, chain); 249 250 if (sc->sc_nexus == NULL) 251 siop_sched(sc); 252 253 splx(s); 254 255 if (flags & XS_CTL_POLL || siop_no_dma) 256 siop_poll(sc, acb); 257 return; 258 259 case ADAPTER_REQ_GROW_RESOURCES: 260 return; 261 262 case ADAPTER_REQ_SET_XFER_MODE: 263 return; 264 } 265 } 266 267 void 268 siop_poll(struct siop_softc *sc, struct siop_acb *acb) 269 { 270 siop_regmap_p rp = sc->sc_siopp; 271 struct scsipi_xfer *xs = acb->xs; 272 int i; 273 int status; 274 u_char istat; 275 u_char dstat; 276 u_char sstat0; 277 int s; 278 int to; 279 280 s = splbio(); 281 to = xs->timeout / 1000; 282 if (sc->nexus_list.tqh_first) 283 printf("%s: siop_poll called with disconnected device\n", 284 sc->sc_dev.dv_xname); 285 for (;;) { 286 /* use cmd_wait values? */ 287 i = 50000; 288 /* XXX spl0(); */ 289 while (((istat = rp->siop_istat) & 290 (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 291 if (--i <= 0) { 292 #ifdef DEBUG 293 printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %lx (+%lx) dcmd %lx ds %p timeout %d\n", 294 xs->xs_periph->periph_target, acb->cmd.opcode, 295 rp->siop_sbcl, rp->siop_dsp, 296 rp->siop_dsp - sc->sc_scriptspa, 297 *((long *)&rp->siop_dcmd), &acb->ds, acb->xs->timeout); 298 #endif 299 i = 50000; 300 --to; 301 if (to <= 0) { 302 siopreset(sc); 303 return; 304 } 305 } 306 delay(20); 307 } 308 sstat0 = rp->siop_sstat0; 309 dstat = rp->siop_dstat; 310 if (siop_checkintr(sc, istat, dstat, sstat0, &status)) { 311 if (acb != sc->sc_nexus) 312 printf("%s: siop_poll disconnected device completed\n", 313 sc->sc_dev.dv_xname); 314 else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 315 sc->sc_flags &= ~SIOP_INTSOFF; 316 rp->siop_sien = sc->sc_sien; 317 rp->siop_dien = sc->sc_dien; 318 } 319 siop_scsidone(sc->sc_nexus, status); 320 } 321 322 if (xs->xs_status & XS_STS_DONE) 323 break; 324 } 325 splx(s); 326 } 327 328 /* 329 * start next command that's ready 330 */ 331 void 332 siop_sched(struct siop_softc *sc) 333 { 334 struct scsipi_periph *periph; 335 struct siop_acb *acb; 336 int i; 337 338 #ifdef DEBUG 339 if (sc->sc_nexus) { 340 printf("%s: siop_sched- nexus %p/%d ready %p/%d\n", 341 sc->sc_dev.dv_xname, sc->sc_nexus, 342 sc->sc_nexus->xs->xs_periph->periph_target, 343 sc->ready_list.tqh_first, 344 sc->ready_list.tqh_first->xs->xs_periph->periph_target); 345 return; 346 } 347 #endif 348 for (acb = sc->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) { 349 periph = acb->xs->xs_periph; 350 i = periph->periph_target; 351 if(!(sc->sc_tinfo[i].lubusy & (1 << periph->periph_lun))) { 352 struct siop_tinfo *ti = &sc->sc_tinfo[i]; 353 354 TAILQ_REMOVE(&sc->ready_list, acb, chain); 355 sc->sc_nexus = acb; 356 periph = acb->xs->xs_periph; 357 ti = &sc->sc_tinfo[periph->periph_target]; 358 ti->lubusy |= (1 << periph->periph_lun); 359 break; 360 } 361 } 362 363 if (acb == NULL) { 364 #ifdef DEBUGXXX 365 printf("%s: siop_sched didn't find ready command\n", 366 sc->sc_dev.dv_xname); 367 #endif 368 return; 369 } 370 371 if (acb->xs->xs_control & XS_CTL_RESET) 372 siopreset(sc); 373 374 #if 0 375 acb->cmd.bytes[0] |= slp->scsipi_scsi.lun << 5; /* XXXX */ 376 #endif 377 ++sc->sc_active; 378 siop_select(sc); 379 } 380 381 void 382 siop_scsidone(struct siop_acb *acb, int stat) 383 { 384 struct scsipi_xfer *xs; 385 struct scsipi_periph *periph; 386 struct siop_softc *sc; 387 int dosched = 0; 388 389 if (acb == NULL || (xs = acb->xs) == NULL) { 390 #ifdef DIAGNOSTIC 391 printf("siop_scsidone: NULL acb or scsipi_xfer\n"); 392 #if defined(DEBUG) && defined(DDB) 393 Debugger(); 394 #endif 395 #endif 396 return; 397 } 398 periph = xs->xs_periph; 399 sc = (void *)periph->periph_channel->chan_adapter->adapt_dev; 400 401 xs->status = stat; 402 xs->resid = 0; /* XXXX */ 403 404 if (xs->error == XS_NOERROR) { 405 if (stat == SCSI_CHECK || stat == SCSI_BUSY) 406 xs->error = XS_BUSY; 407 } 408 409 /* 410 * Remove the ACB from whatever queue it's on. We have to do a bit of 411 * a hack to figure out which queue it's on. Note that it is *not* 412 * necessary to cdr down the ready queue, but we must cdr down the 413 * nexus queue and see if it's there, so we can mark the unit as no 414 * longer busy. This code is sickening, but it works. 415 */ 416 if (acb == sc->sc_nexus) { 417 sc->sc_nexus = NULL; 418 sc->sc_tinfo[periph->periph_target].lubusy &= 419 ~(1<<periph->periph_lun); 420 if (sc->ready_list.tqh_first) 421 dosched = 1; /* start next command */ 422 --sc->sc_active; 423 SIOP_TRACE('d','a',stat,0) 424 } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) { 425 TAILQ_REMOVE(&sc->ready_list, acb, chain); 426 SIOP_TRACE('d','r',stat,0) 427 } else { 428 register struct siop_acb *acb2; 429 for (acb2 = sc->nexus_list.tqh_first; acb2; 430 acb2 = acb2->chain.tqe_next) 431 if (acb2 == acb) { 432 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 433 sc->sc_tinfo[periph->periph_target].lubusy 434 &= ~(1<<periph->periph_lun); 435 --sc->sc_active; 436 break; 437 } 438 if (acb2) 439 ; 440 else if (acb->chain.tqe_next) { 441 TAILQ_REMOVE(&sc->ready_list, acb, chain); 442 --sc->sc_active; 443 } else { 444 printf("%s: can't find matching acb\n", 445 sc->sc_dev.dv_xname); 446 #ifdef DDB 447 /* Debugger(); */ 448 #endif 449 } 450 SIOP_TRACE('d','n',stat,0); 451 } 452 /* Put it on the free list. */ 453 acb->flags = ACB_FREE; 454 TAILQ_INSERT_HEAD(&sc->free_list, acb, chain); 455 456 sc->sc_tinfo[periph->periph_target].cmds++; 457 458 scsipi_done(xs); 459 460 if (dosched && sc->sc_nexus == NULL) 461 siop_sched(sc); 462 } 463 464 void 465 siopabort(register struct siop_softc *sc, siop_regmap_p rp, char *where) 466 { 467 #ifdef fix_this 468 int i; 469 #endif 470 471 printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n", 472 sc->sc_dev.dv_xname, 473 where, rp->siop_dstat, rp->siop_sstat0, rp->siop_sbcl); 474 475 if (sc->sc_active > 0) { 476 #ifdef TODO 477 SET_SBIC_cmd (rp, SBIC_CMD_ABORT); 478 WAIT_CIP (rp); 479 480 GET_SBIC_asr (rp, asr); 481 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) 482 { 483 /* ok, get more drastic.. */ 484 485 SET_SBIC_cmd (rp, SBIC_CMD_RESET); 486 delay(25); 487 SBIC_WAIT(rp, SBIC_ASR_INT, 0); 488 GET_SBIC_csr (rp, csr); /* clears interrupt also */ 489 490 return; 491 } 492 493 do 494 { 495 SBIC_WAIT (rp, SBIC_ASR_INT, 0); 496 GET_SBIC_csr (rp, csr); 497 } 498 while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 499 && (csr != SBIC_CSR_CMD_INVALID)); 500 #endif 501 502 /* lets just hope it worked.. */ 503 #ifdef fix_this 504 for (i = 0; i < 2; ++i) { 505 if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] != 506 sc->sc_cur) { 507 printf ("siopabort: cleanup!\n"); 508 sc->sc_iob[i].sc_xs = NULL; 509 } 510 } 511 #endif /* fix_this */ 512 /* sc->sc_active = 0; */ 513 } 514 } 515 516 void 517 siopinitialize(struct siop_softc *sc) 518 { 519 int i; 520 u_int inhibit_sync; 521 extern u_long scsi_nosync; 522 extern int shift_nosync; 523 524 /* 525 * Need to check that scripts is on a long word boundary 526 * Also should verify that dev doesn't span non-contiguous 527 * physical pages. 528 */ 529 sc->sc_scriptspa = kvtop((caddr_t)scripts); 530 531 /* 532 * malloc sc_acb to ensure that DS is on a long word boundary. 533 */ 534 535 MALLOC(sc->sc_acb, struct siop_acb *, 536 sizeof(struct siop_acb) * SIOP_NACB, M_DEVBUF, M_NOWAIT); 537 if (sc->sc_acb == NULL) 538 panic("siopinitialize: ACB malloc failed!"); 539 540 sc->sc_tcp[1] = 1000 / sc->sc_clock_freq; 541 sc->sc_tcp[2] = 1500 / sc->sc_clock_freq; 542 sc->sc_tcp[3] = 2000 / sc->sc_clock_freq; 543 sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */ 544 if (sc->sc_minsync < 25) 545 sc->sc_minsync = 25; 546 if (sc->sc_clock_freq <= 25) { 547 sc->sc_dcntl |= 0x80; /* SCLK/1 */ 548 sc->sc_tcp[0] = sc->sc_tcp[1]; 549 } else if (sc->sc_clock_freq <= 37) { 550 sc->sc_dcntl |= 0x40; /* SCLK/1.5 */ 551 sc->sc_tcp[0] = sc->sc_tcp[2]; 552 } else if (sc->sc_clock_freq <= 50) { 553 sc->sc_dcntl |= 0x00; /* SCLK/2 */ 554 sc->sc_tcp[0] = sc->sc_tcp[3]; 555 } else { 556 sc->sc_dcntl |= 0xc0; /* SCLK/3 */ 557 sc->sc_tcp[0] = 3000 / sc->sc_clock_freq; 558 } 559 560 if (scsi_nosync) { 561 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff; 562 shift_nosync += 8; 563 #ifdef DEBUG 564 if (inhibit_sync) 565 printf("%s: Inhibiting synchronous transfer %02x\n", 566 sc->sc_dev.dv_xname, inhibit_sync); 567 #endif 568 for (i = 0; i < 8; ++i) 569 if (inhibit_sync & (1 << i)) 570 siop_inhibit_sync[i] = 1; 571 } 572 573 siopreset (sc); 574 } 575 576 void 577 siopreset(struct siop_softc *sc) 578 { 579 siop_regmap_p rp; 580 u_int i, s; 581 u_char dummy; 582 struct siop_acb *acb; 583 584 rp = sc->sc_siopp; 585 586 if (sc->sc_flags & SIOP_ALIVE) 587 siopabort(sc, rp, "reset"); 588 589 printf("%s: ", sc->sc_dev.dv_xname); /* XXXX */ 590 591 s = splbio(); 592 593 /* 594 * Reset the chip 595 * XXX - is this really needed? 596 */ 597 rp->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */ 598 rp->siop_istat |= SIOP_ISTAT_RST; /* reset chip */ 599 rp->siop_istat &= ~SIOP_ISTAT_RST; 600 /* 601 * Reset SCSI bus (do we really want this?) 602 */ 603 rp->siop_sien = 0; 604 rp->siop_scntl1 |= SIOP_SCNTL1_RST; 605 delay(1); 606 rp->siop_scntl1 &= ~SIOP_SCNTL1_RST; 607 608 /* 609 * Set up various chip parameters 610 */ 611 rp->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG; 612 rp->siop_scntl1 = SIOP_SCNTL1_ESR; 613 rp->siop_dcntl = sc->sc_dcntl; 614 rp->siop_dmode = 0x80; /* burst length = 4 */ 615 rp->siop_sien = 0x00; /* don't enable interrupts yet */ 616 rp->siop_dien = 0x00; /* don't enable interrupts yet */ 617 rp->siop_scid = 1 << sc->sc_channel.chan_id; 618 rp->siop_dwt = 0x00; 619 rp->siop_ctest0 |= SIOP_CTEST0_BTD | SIOP_CTEST0_EAN; 620 rp->siop_ctest7 |= sc->sc_ctest7; 621 622 /* will need to re-negotiate sync xfers */ 623 bzero(&sc->sc_sync, sizeof (sc->sc_sync)); 624 625 i = rp->siop_istat; 626 if (i & SIOP_ISTAT_SIP) 627 dummy = rp->siop_sstat0; 628 if (i & SIOP_ISTAT_DIP) 629 dummy = rp->siop_dstat; 630 631 splx (s); 632 633 delay (siop_reset_delay * 1000); 634 printf("siop id %d reset V%d\n", sc->sc_channel.chan_id, 635 rp->siop_ctest8 >> 4); 636 637 if ((sc->sc_flags & SIOP_ALIVE) == 0) { 638 TAILQ_INIT(&sc->ready_list); 639 TAILQ_INIT(&sc->nexus_list); 640 TAILQ_INIT(&sc->free_list); 641 sc->sc_nexus = NULL; 642 acb = sc->sc_acb; 643 bzero(acb, sizeof(struct siop_acb) * SIOP_NACB); 644 for (i = 0; i < SIOP_NACB; i++) { 645 TAILQ_INSERT_TAIL(&sc->free_list, acb, chain); 646 acb++; 647 } 648 bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo)); 649 } else { 650 if (sc->sc_nexus != NULL) { 651 sc->sc_nexus->xs->error = XS_RESET; 652 siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); 653 } 654 while ((acb = sc->nexus_list.tqh_first) > 0) { 655 acb->xs->error = XS_RESET; 656 siop_scsidone(acb, acb->stat[0]); 657 } 658 } 659 660 sc->sc_flags |= SIOP_ALIVE; 661 sc->sc_flags &= ~(SIOP_INTDEFER|SIOP_INTSOFF); 662 /* enable SCSI and DMA interrupts */ 663 sc->sc_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE | 664 SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR; 665 sc->sc_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR | 666 /*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID; 667 rp->siop_sien = sc->sc_sien; 668 rp->siop_dien = sc->sc_dien; 669 } 670 671 /* 672 * Setup Data Storage for 53C710 and start SCRIPTS processing 673 */ 674 675 void 676 siop_start(struct siop_softc *sc, int target, int lun, u_char *cbuf, int clen, 677 u_char *buf, int len) 678 { 679 siop_regmap_p rp = sc->sc_siopp; 680 int nchain; 681 int count, tcount; 682 char *addr, *dmaend; 683 struct siop_acb *acb = sc->sc_nexus; 684 #ifdef DEBUG 685 int i; 686 #endif 687 688 #ifdef DEBUG 689 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 690 printf ("ACK! siop was busy: rp %p script %p dsa %p active %ld\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 /* 726 * Negotiate wide is the initial negotiation state; since the 53c710 727 * doesn't do wide transfers, just begin the synchronous transfer 728 * negotation here. 729 */ 730 if (sc->sc_sync[target].state == NEG_WIDE) { 731 if (siop_inhibit_sync[target]) { 732 sc->sc_sync[target].state = NEG_DONE; 733 sc->sc_sync[target].sbcl = 0; 734 sc->sc_sync[target].sxfer = 0; 735 #ifdef DEBUG 736 if (siopsync_debug) 737 printf ("Forcing target %d asynchronous\n", target); 738 #endif 739 } 740 else { 741 acb->msg[2] = -1; 742 acb->msgout[1] = MSG_EXT_MESSAGE; 743 acb->msgout[2] = 3; 744 acb->msgout[3] = MSG_SYNC_REQ; 745 #ifdef MAXTOR_SYNC_KLUDGE 746 acb->msgout[4] = 50 / 4; /* ask for ridiculous period */ 747 #else 748 acb->msgout[4] = sc->sc_minsync; 749 #endif 750 acb->msgout[5] = SIOP_MAX_OFFSET; 751 acb->ds.idlen = 6; 752 sc->sc_sync[target].state = NEG_WAITS; 753 #ifdef DEBUG 754 if (siopsync_debug) 755 printf ("Sending sync request to target %d\n", target); 756 #endif 757 } 758 } 759 760 /* 761 * Build physical DMA addresses for scatter/gather I/O 762 */ 763 acb->iob_buf = buf; 764 acb->iob_len = len; 765 acb->iob_curbuf = acb->iob_curlen = 0; 766 nchain = 0; 767 count = len; 768 addr = buf; 769 dmaend = NULL; 770 while (count > 0) { 771 acb->ds.chain[nchain].databuf = (char *) kvtop (addr); 772 if (count < (tcount = PAGE_SIZE - ((int) addr & PGOFSET))) 773 tcount = count; 774 acb->ds.chain[nchain].datalen = tcount; 775 addr += tcount; 776 count -= tcount; 777 if (acb->ds.chain[nchain].databuf == dmaend) { 778 dmaend += acb->ds.chain[nchain].datalen; 779 acb->ds.chain[nchain].datalen = 0; 780 acb->ds.chain[--nchain].datalen += tcount; 781 #ifdef DEBUG 782 ++siopdma_hits; 783 #endif 784 } 785 else { 786 dmaend = acb->ds.chain[nchain].databuf + 787 acb->ds.chain[nchain].datalen; 788 acb->ds.chain[nchain].datalen = tcount; 789 #ifdef DEBUG 790 if (nchain) /* Don't count miss on first one */ 791 ++siopdma_misses; 792 #endif 793 } 794 ++nchain; 795 } 796 #ifdef DEBUG 797 if (nchain != 1 && len != 0 && siop_debug & 3) { 798 printf ("DMA chaining set: %d\n", nchain); 799 for (i = 0; i < nchain; ++i) { 800 printf (" [%d] %8p %lx\n", i, acb->ds.chain[i].databuf, 801 acb->ds.chain[i].datalen); 802 } 803 } 804 #endif 805 806 /* push data cache for all data the 53c710 needs to access */ 807 dma_cachectl ((caddr_t)acb, sizeof (struct siop_acb)); 808 dma_cachectl (cbuf, clen); 809 if (buf != NULL && len != 0) 810 dma_cachectl (buf, len); 811 #ifdef DEBUG 812 if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) { 813 printf ("ACK! siop was busy at start: rp %p script %p dsa %p active %ld\n", 814 rp, &scripts, &acb->ds, sc->sc_active); 815 #ifdef DDB 816 /*Debugger();*/ 817 #endif 818 } 819 #endif 820 if (sc->nexus_list.tqh_first == NULL) { 821 if (rp->siop_istat & SIOP_ISTAT_CON) 822 printf("%s: siop_select while connected?\n", 823 sc->sc_dev.dv_xname); 824 rp->siop_temp = 0; 825 rp->siop_sbcl = sc->sc_sync[target].sbcl; 826 rp->siop_dsa = kvtop((caddr_t)&acb->ds); 827 rp->siop_dsp = sc->sc_scriptspa; 828 SIOP_TRACE('s',1,0,0) 829 } else { 830 if ((rp->siop_istat & SIOP_ISTAT_CON) == 0) { 831 rp->siop_istat = SIOP_ISTAT_SIGP; 832 SIOP_TRACE('s',2,0,0); 833 } 834 else { 835 SIOP_TRACE('s',3,rp->siop_istat,0); 836 } 837 } 838 #ifdef DEBUG 839 ++siopstarts; 840 #endif 841 } 842 843 /* 844 * Process a DMA or SCSI interrupt from the 53C710 SIOP 845 */ 846 847 int 848 siop_checkintr(struct siop_softc *sc, u_char istat, u_char dstat, 849 u_char sstat0, int *status) 850 { 851 siop_regmap_p rp = sc->sc_siopp; 852 struct siop_acb *acb = sc->sc_nexus; 853 int target = 0; 854 int dfifo, dbc, sstat1; 855 856 dfifo = rp->siop_dfifo; 857 dbc = rp->siop_dbc0; 858 sstat1 = rp->siop_sstat1; 859 rp->siop_ctest8 |= SIOP_CTEST8_CLF; 860 while ((rp->siop_ctest1 & SIOP_CTEST1_FMT) != SIOP_CTEST1_FMT) 861 ; 862 rp->siop_ctest8 &= ~SIOP_CTEST8_CLF; 863 #ifdef DEBUG 864 ++siopints; 865 #if 0 866 if (siop_debug & 0x100) { 867 DCIAS(&acb->stat[0]); /* XXX */ 868 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", 869 istat, dstat, sstat0, rp->siop_dsps, rp->siop_sbcl, acb->stat[0], acb->msg[0]); 870 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 871 acb->msg[0], acb->msg[1], acb->msg[2], 872 acb->msg[3], acb->msg[4], acb->msg[5]); 873 } 874 #endif 875 if (rp->siop_dsp && (rp->siop_dsp < sc->sc_scriptspa || 876 rp->siop_dsp >= sc->sc_scriptspa + sizeof(scripts))) { 877 printf ("%s: dsp not within script dsp %lx scripts %lx:%lx", 878 sc->sc_dev.dv_xname, rp->siop_dsp, sc->sc_scriptspa, 879 sc->sc_scriptspa + sizeof(scripts)); 880 printf(" istat %x dstat %x sstat0 %x\n", 881 istat, dstat, sstat0); 882 #ifdef DDB 883 Debugger(); 884 #endif 885 } 886 #endif 887 SIOP_TRACE('i',dstat,istat,(istat&SIOP_ISTAT_DIP)?rp->siop_dsps&0xff:sstat0); 888 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff00) { 889 /* Normal completion status, or check condition */ 890 #ifdef DEBUG 891 if (rp->siop_dsa != kvtop((caddr_t)&acb->ds)) { 892 printf ("siop: invalid dsa: %lx %x\n", rp->siop_dsa, 893 kvtop((caddr_t)&acb->ds)); 894 panic("*** siop DSA invalid ***"); 895 } 896 #endif 897 target = acb->xs->xs_periph->periph_target; 898 if (sc->sc_sync[target].state == NEG_WAITS) { 899 if (acb->msg[1] == 0xff) 900 printf ("%s: target %d ignored sync request\n", 901 sc->sc_dev.dv_xname, target); 902 else if (acb->msg[1] == MSG_REJECT) 903 printf ("%s: target %d rejected sync request\n", 904 sc->sc_dev.dv_xname, target); 905 else 906 /* XXX - need to set sync transfer parameters */ 907 printf("%s: target %d (sync) %02x %02x %02x\n", 908 sc->sc_dev.dv_xname, target, acb->msg[1], 909 acb->msg[2], acb->msg[3]); 910 sc->sc_sync[target].state = NEG_DONE; 911 } 912 dma_cachectl(&acb->stat[0], 1); 913 *status = acb->stat[0]; 914 #ifdef DEBUG 915 if (rp->siop_sbcl & SIOP_BSY) { 916 /*printf ("ACK! siop was busy at end: rp %x script %x dsa %x\n", 917 rp, &scripts, &acb->ds);*/ 918 #ifdef DDB 919 /*Debugger();*/ 920 #endif 921 } 922 if (acb->msg[0] != 0x00) 923 printf("%s: message was not COMMAND COMPLETE: %x\n", 924 sc->sc_dev.dv_xname, acb->msg[0]); 925 #endif 926 if (sc->nexus_list.tqh_first) 927 rp->siop_dcntl |= SIOP_DCNTL_STD; 928 return 1; 929 } 930 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0b) { 931 target = acb->xs->xs_periph->periph_target; 932 if (acb->msg[1] == MSG_EXT_MESSAGE && acb->msg[2] == 3 && 933 acb->msg[3] == MSG_SYNC_REQ) { 934 #ifdef DEBUG 935 if (siopsync_debug) 936 printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", 937 acb->msg[0], acb->msg[1], acb->msg[2], 938 acb->msg[3], acb->msg[4], acb->msg[5]); 939 #endif 940 sc->sc_sync[target].sxfer = 0; 941 sc->sc_sync[target].sbcl = 0; 942 if (acb->msg[2] == 3 && 943 acb->msg[3] == MSG_SYNC_REQ && 944 acb->msg[5] != 0) { 945 #ifdef MAXTOR_KLUDGE 946 /* 947 * Kludge for my Maxtor XT8580S 948 * It accepts whatever we request, even 949 * though it won't work. So we ask for 950 * a short period than we can handle. If 951 * the device says it can do it, use 208ns. 952 * If the device says it can do less than 953 * 100ns, then we limit it to 100ns. 954 */ 955 if (acb->msg[4] && acb->msg[4] < 100 / 4) { 956 #ifdef DEBUG 957 printf ("%d: target %d wanted %dns period\n", 958 sc->sc_dev.dv_xname, target, 959 acb->msg[4] * 4); 960 #endif 961 if (acb->msg[4] == 50 / 4) 962 acb->msg[4] = 208 / 4; 963 else 964 acb->msg[4] = 100 / 4; 965 } 966 #endif /* MAXTOR_KLUDGE */ 967 printf ("%s: target %d now synchronous, period=%dns, offset=%d\n", 968 sc->sc_dev.dv_xname, target, 969 acb->msg[4] * 4, acb->msg[5]); 970 scsi_period_to_siop (sc, target); 971 } 972 rp->siop_sxfer = sc->sc_sync[target].sxfer; 973 rp->siop_sbcl = sc->sc_sync[target].sbcl; 974 if (sc->sc_sync[target].state == NEG_WAITS) { 975 sc->sc_sync[target].state = NEG_DONE; 976 rp->siop_dsp = sc->sc_scriptspa + Ent_clear_ack; 977 return(0); 978 } 979 rp->siop_dcntl |= SIOP_DCNTL_STD; 980 sc->sc_sync[target].state = NEG_DONE; 981 return (0); 982 } 983 /* XXX - not SDTR message */ 984 } 985 if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */ 986 #ifdef DEBUG 987 ++siopphmm; 988 if (acb == NULL) 989 printf("%s: Phase mismatch with no active command?\n", 990 sc->sc_dev.dv_xname); 991 #endif 992 if (acb->iob_len) { 993 int adjust; 994 adjust = ((dfifo - (dbc & 0x7f)) & 0x7f); 995 if (sstat1 & SIOP_SSTAT1_ORF) 996 ++adjust; 997 if (sstat1 & SIOP_SSTAT1_OLF) 998 ++adjust; 999 acb->iob_curlen = *((long *)&rp->siop_dcmd) & 0xffffff; 1000 acb->iob_curlen += adjust; 1001 acb->iob_curbuf = *((long *)&rp->siop_dnad) - adjust; 1002 #ifdef DEBUG 1003 if (siop_debug & 0x100) { 1004 int i; 1005 printf ("Phase mismatch: curbuf %lx curlen %lx dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %p\n", 1006 acb->iob_curbuf, acb->iob_curlen, dfifo, 1007 dbc, sstat1, adjust, rp->siop_sbcl, siopstarts, acb); 1008 if (acb->ds.chain[1].datalen) { 1009 for (i = 0; acb->ds.chain[i].datalen; ++i) 1010 printf("chain[%d] addr %p len %lx\n", 1011 i, acb->ds.chain[i].databuf, 1012 acb->ds.chain[i].datalen); 1013 } 1014 } 1015 #endif 1016 dma_cachectl ((caddr_t)acb, sizeof(*acb)); 1017 } 1018 #ifdef DEBUG 1019 SIOP_TRACE('m',rp->siop_sbcl,(rp->siop_dsp>>8),rp->siop_dsp); 1020 if (siop_debug & 9) 1021 printf ("Phase mismatch: %x dsp +%lx dcmd %lx\n", 1022 rp->siop_sbcl, 1023 rp->siop_dsp - sc->sc_scriptspa, 1024 *((long *)&rp->siop_dcmd)); 1025 #endif 1026 if ((rp->siop_sbcl & SIOP_REQ) == 0) { 1027 printf ("Phase mismatch: REQ not asserted! %02x dsp %lx\n", 1028 rp->siop_sbcl, rp->siop_dsp); 1029 #if defined(DEBUG) && defined(DDB) 1030 /*Debugger(); XXX is*/ 1031 #endif 1032 } 1033 switch (rp->siop_sbcl & 7) { 1034 case 0: /* data out */ 1035 case 1: /* data in */ 1036 case 2: /* status */ 1037 case 3: /* command */ 1038 case 6: /* message in */ 1039 case 7: /* message out */ 1040 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1041 break; 1042 default: 1043 goto bad_phase; 1044 } 1045 return 0; 1046 } 1047 if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */ 1048 #ifdef DEBUG 1049 if (acb == NULL) 1050 printf("%s: Select timeout with no active command?\n", 1051 sc->sc_dev.dv_xname); 1052 if (rp->siop_sbcl & SIOP_BSY) { 1053 printf ("ACK! siop was busy at timeout: rp %p script %p dsa %p\n", 1054 rp, &scripts, &acb->ds); 1055 printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n", 1056 rp->siop_sbcl, rp->siop_sdid, istat, dstat, sstat0); 1057 if (!(rp->siop_sbcl & SIOP_BSY)) { 1058 printf ("Yikes, it's not busy now!\n"); 1059 #if 0 1060 *status = -1; 1061 if (sc->nexus_list.tqh_first) 1062 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1063 return 1; 1064 #endif 1065 } 1066 /* rp->siop_dcntl |= SIOP_DCNTL_STD;*/ 1067 return (0); 1068 #ifdef DDB 1069 Debugger(); 1070 #endif 1071 } 1072 #endif 1073 *status = -1; 1074 acb->xs->error = XS_SELTIMEOUT; 1075 if (sc->nexus_list.tqh_first) 1076 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1077 return 1; 1078 } 1079 if (acb) 1080 target = acb->xs->xs_periph->periph_target; 1081 else 1082 target = 7; 1083 if (sstat0 & SIOP_SSTAT0_UDC) { 1084 #ifdef DEBUG 1085 if (acb == NULL) 1086 printf("%s: Unexpected disconnect with no active command?\n", 1087 sc->sc_dev.dv_xname); 1088 printf ("%s: target %d disconnected unexpectedly\n", 1089 sc->sc_dev.dv_xname, target); 1090 #endif 1091 #if 0 1092 siopabort (sc, rp, "siopchkintr"); 1093 #endif 1094 *status = STS_BUSY; 1095 if (sc->nexus_list.tqh_first) 1096 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1097 return (acb != NULL); 1098 } 1099 if (dstat & SIOP_DSTAT_SIR && (rp->siop_dsps == 0xff01 || 1100 rp->siop_dsps == 0xff02)) { 1101 #ifdef DEBUG 1102 if (siop_debug & 0x100) 1103 printf ("%s: ID %02x disconnected TEMP %lx (+%lx) curbuf %lx curlen %lx buf %p len %lx dfifo %x dbc %x sstat1 %x starts %d acb %p\n", 1104 sc->sc_dev.dv_xname, 1 << target, rp->siop_temp, 1105 rp->siop_temp ? rp->siop_temp - sc->sc_scriptspa : 0, 1106 acb->iob_curbuf, acb->iob_curlen, 1107 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, siopstarts, acb); 1108 #endif 1109 if (acb == NULL) { 1110 printf("%s: Disconnect with no active command?\n", 1111 sc->sc_dev.dv_xname); 1112 return (0); 1113 } 1114 /* 1115 * XXXX need to update iob_curbuf/iob_curlen to reflect 1116 * current data transferred. If device disconnected in 1117 * the middle of a DMA block, they should already be set 1118 * by the phase change interrupt. If the disconnect 1119 * occurs on a DMA block boundary, we have to figure out 1120 * which DMA block it was. 1121 */ 1122 if (acb->iob_len && rp->siop_temp) { 1123 int n = rp->siop_temp - sc->sc_scriptspa; 1124 1125 if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen) 1126 printf("%s: iob_curbuf/len already set? n %x iob %lx/%lx chain[0] %p/%lx\n", 1127 sc->sc_dev.dv_xname, n, acb->iob_curbuf, acb->iob_curlen, 1128 acb->ds.chain[0].databuf, acb->ds.chain[0].datalen); 1129 if (n < Ent_datain) 1130 n = (n - Ent_dataout) / 16; 1131 else 1132 n = (n - Ent_datain) / 16; 1133 if (n <= 0 && n > DMAMAXIO) 1134 printf("TEMP invalid %d\n", n); 1135 else { 1136 acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf; 1137 acb->iob_curlen = acb->ds.chain[n].datalen; 1138 } 1139 #ifdef DEBUG 1140 if (siop_debug & 0x100) { 1141 printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n); 1142 printf(" curbuf %lx curlen %lx\n", acb->iob_curbuf, 1143 acb->iob_curlen); 1144 } 1145 #endif 1146 } 1147 /* 1148 * If data transfer was interrupted by disconnect, iob_curbuf 1149 * and iob_curlen should reflect the point of interruption. 1150 * Adjust the DMA chain so that the data transfer begins 1151 * at the appropriate place upon reselection. 1152 * XXX This should only be done on save data pointer message? 1153 */ 1154 if (acb->iob_curlen) { 1155 int i, j; 1156 1157 #ifdef DEBUG 1158 if (siop_debug & 0x100) 1159 printf ("%s: adjusting DMA chain\n", 1160 sc->sc_dev.dv_xname); 1161 if (rp->siop_dsps == 0xff02) 1162 printf ("%s: ID %02x disconnected without Save Data Pointers\n", 1163 sc->sc_dev.dv_xname, 1 << target); 1164 #endif 1165 /* XXX is: if (rp->siop_dsps != 0xff02) { */ 1166 /* not disconnected without save data ptr */ 1167 for (i = 0; i < DMAMAXIO; ++i) { 1168 if (acb->ds.chain[i].datalen == 0) 1169 break; 1170 if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf && 1171 acb->iob_curbuf < (long)(acb->ds.chain[i].databuf + 1172 acb->ds.chain[i].datalen)) 1173 break; 1174 } 1175 if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0) { 1176 printf("couldn't find saved data pointer: "); 1177 printf("curbuf %lx curlen %lx i %d\n", 1178 acb->iob_curbuf, acb->iob_curlen, i); 1179 #ifdef DDB 1180 Debugger(); 1181 #endif 1182 } 1183 /* XXX is: } */ 1184 #ifdef DEBUG 1185 if (siop_debug & 0x100) 1186 printf(" chain[0]: %p/%lx -> %lx/%lx\n", 1187 acb->ds.chain[0].databuf, 1188 acb->ds.chain[0].datalen, 1189 acb->iob_curbuf, 1190 acb->iob_curlen); 1191 #endif 1192 acb->ds.chain[0].databuf = (char *)acb->iob_curbuf; 1193 acb->ds.chain[0].datalen = acb->iob_curlen; 1194 for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) { 1195 #ifdef DEBUG 1196 if (siop_debug & 0x100) 1197 printf(" chain[%d]: %p/%lx -> %p/%lx\n", j, 1198 acb->ds.chain[j].databuf, 1199 acb->ds.chain[j].datalen, 1200 acb->ds.chain[i].databuf, 1201 acb->ds.chain[i].datalen); 1202 #endif 1203 acb->ds.chain[j].databuf = acb->ds.chain[i].databuf; 1204 acb->ds.chain[j].datalen = acb->ds.chain[i].datalen; 1205 } 1206 if (j < DMAMAXIO) 1207 acb->ds.chain[j].datalen = 0; 1208 DCIAS(kvtop((caddr_t)&acb->ds.chain)); 1209 } 1210 ++sc->sc_tinfo[target].dconns; 1211 /* 1212 * add nexus to waiting list 1213 * clear nexus 1214 * try to start another command for another target/lun 1215 */ 1216 acb->status = sc->sc_flags & SIOP_INTSOFF; 1217 TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain); 1218 sc->sc_nexus = NULL; /* no current device */ 1219 /* start script to wait for reselect */ 1220 if (sc->sc_nexus == NULL) 1221 rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect; 1222 /* XXXX start another command ? */ 1223 if (sc->ready_list.tqh_first) 1224 siop_sched(sc); 1225 return (0); 1226 } 1227 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff03) { 1228 int reselid = rp->siop_scratch & 0x7f; 1229 int reselun = rp->siop_sfbr & 0x07; 1230 1231 sc->sc_sstat1 = rp->siop_sbcl; /* XXXX save current SBCL */ 1232 #ifdef DEBUG 1233 if (siop_debug & 0x100) 1234 printf ("%s: target ID %02x reselected dsps %lx\n", 1235 sc->sc_dev.dv_xname, reselid, 1236 rp->siop_dsps); 1237 if ((rp->siop_sfbr & 0x80) == 0) 1238 printf("%s: Reselect message in was not identify: %x\n", 1239 sc->sc_dev.dv_xname, rp->siop_sfbr); 1240 #endif 1241 if (sc->sc_nexus) { 1242 #ifdef DEBUG 1243 if (siop_debug & 0x100) 1244 printf ("%s: reselect ID %02x w/active\n", 1245 sc->sc_dev.dv_xname, reselid); 1246 #endif 1247 TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain); 1248 sc->sc_tinfo[sc->sc_nexus->xs->xs_periph->periph_target].lubusy 1249 &= ~(1 << sc->sc_nexus->xs->xs_periph->periph_lun); 1250 --sc->sc_active; 1251 } 1252 /* 1253 * locate acb of reselecting device 1254 * set sc->sc_nexus to acb 1255 */ 1256 for (acb = sc->nexus_list.tqh_first; acb; 1257 acb = acb->chain.tqe_next) { 1258 if (reselid != (acb->ds.scsi_addr >> 16) || 1259 reselun != (acb->msgout[0] & 0x07)) 1260 continue; 1261 TAILQ_REMOVE(&sc->nexus_list, acb, chain); 1262 sc->sc_nexus = acb; 1263 sc->sc_flags |= acb->status; 1264 acb->status = 0; 1265 DCIAS(kvtop(&acb->stat[0])); 1266 rp->siop_dsa = kvtop((caddr_t)&acb->ds); 1267 rp->siop_sxfer = 1268 sc->sc_sync[acb->xs->xs_periph->periph_target].sxfer; 1269 rp->siop_sbcl = 1270 sc->sc_sync[acb->xs->xs_periph->periph_target].sbcl; 1271 break; 1272 } 1273 if (acb == NULL) { 1274 printf("%s: target ID %02x reselect nexus_list %p\n", 1275 sc->sc_dev.dv_xname, reselid, 1276 sc->nexus_list.tqh_first); 1277 panic("unable to find reselecting device"); 1278 } 1279 dma_cachectl ((caddr_t)acb, sizeof(*acb)); 1280 rp->siop_temp = 0; 1281 rp->siop_dcntl |= SIOP_DCNTL_STD; 1282 return (0); 1283 } 1284 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff04) { 1285 #ifdef DEBUG 1286 u_short ctest2 = rp->siop_ctest2; 1287 1288 /* reselect was interrupted (by Sig_P or select) */ 1289 if (siop_debug & 0x100 || 1290 (ctest2 & SIOP_CTEST2_SIGP) == 0) 1291 printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x istat %x/%x\n", 1292 sc->sc_dev.dv_xname, rp->siop_scntl1, 1293 ctest2, rp->siop_sfbr, istat, rp->siop_istat); 1294 #endif 1295 /* XXX assumes it was not select */ 1296 if (sc->sc_nexus == NULL) { 1297 #ifdef DEBUG 1298 printf("%s: reselect interrupted, sc_nexus == NULL\n", 1299 sc->sc_dev.dv_xname); 1300 #if 0 1301 siop_dump(sc); 1302 #ifdef DDB 1303 Debugger(); 1304 #endif 1305 #endif 1306 #endif 1307 rp->siop_dcntl |= SIOP_DCNTL_STD; 1308 return(0); 1309 } 1310 target = sc->sc_nexus->xs->xs_periph->periph_target; 1311 rp->siop_temp = 0; 1312 rp->siop_dsa = kvtop((caddr_t)&sc->sc_nexus->ds); 1313 rp->siop_sxfer = sc->sc_sync[target].sxfer; 1314 rp->siop_sbcl = sc->sc_sync[target].sbcl; 1315 rp->siop_dsp = sc->sc_scriptspa; 1316 return (0); 1317 } 1318 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff06) { 1319 if (acb == NULL) 1320 printf("%s: Bad message-in with no active command?\n", 1321 sc->sc_dev.dv_xname); 1322 /* Unrecognized message in byte */ 1323 dma_cachectl (&acb->msg[1],1); 1324 printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n", 1325 sc->sc_dev.dv_xname, rp->siop_sfbr, acb->msg[1], rp->siop_sbcl); 1326 /* what should be done here? */ 1327 DCIAS(kvtop(&acb->msg[1])); 1328 rp->siop_dsp = sc->sc_scriptspa + Ent_switch; 1329 return (0); 1330 } 1331 if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff0a) { 1332 /* Status phase wasn't followed by message in phase? */ 1333 printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n", 1334 sc->sc_dev.dv_xname, rp->siop_sbcl, rp->siop_sbdl); 1335 if (rp->siop_sbcl == 0xa7) { 1336 /* It is now, just continue the script? */ 1337 rp->siop_dcntl |= SIOP_DCNTL_STD; 1338 return (0); 1339 } 1340 } 1341 if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) { 1342 dma_cachectl (&acb->stat[0], 1); 1343 dma_cachectl (&acb->msg[0], 1); 1344 printf ("SIOP interrupt: %lx sts %x msg %x %x sbcl %x\n", 1345 rp->siop_dsps, acb->stat[0], acb->msg[0], acb->msg[1], 1346 rp->siop_sbcl); 1347 siopreset (sc); 1348 *status = -1; 1349 return 0; /* siopreset has cleaned up */ 1350 } 1351 if (sstat0 & SIOP_SSTAT0_SGE) 1352 printf ("SIOP: SCSI Gross Error\n"); 1353 if (sstat0 & SIOP_SSTAT0_PAR) 1354 printf ("SIOP: Parity Error\n"); 1355 if (dstat & SIOP_DSTAT_IID) 1356 printf ("SIOP: Invalid instruction detected\n"); 1357 bad_phase: 1358 /* 1359 * temporary panic for unhandled conditions 1360 * displays various things about the 53C710 status and registers 1361 * then panics. 1362 * XXXX need to clean this up to print out the info, reset, and continue 1363 */ 1364 printf ("siopchkintr: target %x ds %p\n", target, &acb->ds); 1365 printf ("scripts %lx ds %x rp %x dsp %lx dcmd %lx\n", sc->sc_scriptspa, 1366 kvtop((caddr_t)&acb->ds), kvtop((caddr_t)rp), rp->siop_dsp, 1367 *((long *)&rp->siop_dcmd)); 1368 printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %lx dsa %lx sbcl %x sts %x msg %x %x sfbr %x\n", 1369 istat, dstat, sstat0, rp->siop_dsps, rp->siop_dsa, 1370 rp->siop_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->siop_sfbr); 1371 #ifdef DEBUG 1372 if (siop_debug & 0x20) 1373 panic("siopchkintr: **** temp ****"); 1374 #endif 1375 #ifdef DDB 1376 Debugger (); 1377 #endif 1378 siopreset (sc); /* hard reset */ 1379 *status = -1; 1380 return 0; /* siopreset cleaned up */ 1381 } 1382 1383 void 1384 siop_select(struct siop_softc *sc) 1385 { 1386 siop_regmap_p rp; 1387 struct siop_acb *acb = sc->sc_nexus; 1388 1389 #ifdef DEBUG 1390 if (siop_debug & 1) 1391 printf ("%s: select ", sc->sc_dev.dv_xname); 1392 #endif 1393 1394 rp = sc->sc_siopp; 1395 if (acb->xs->xs_control & XS_CTL_POLL || siop_no_dma) { 1396 sc->sc_flags |= SIOP_INTSOFF; 1397 sc->sc_flags &= ~SIOP_INTDEFER; 1398 if ((rp->siop_istat & 0x08) == 0) { 1399 rp->siop_sien = 0; 1400 rp->siop_dien = 0; 1401 } 1402 #if 0 1403 } else if ((sc->sc_flags & SIOP_INTDEFER) == 0) { 1404 sc->sc_flags &= ~SIOP_INTSOFF; 1405 if ((rp->siop_istat & 0x08) == 0) { 1406 rp->siop_sien = sc->sc_sien; 1407 rp->siop_dien = sc->sc_dien; 1408 } 1409 #endif 1410 } 1411 #ifdef DEBUG 1412 if (siop_debug & 1) 1413 printf ("siop_select: target %x cmd %02x ds %p\n", 1414 acb->xs->xs_periph->periph_target, acb->cmd.opcode, 1415 &sc->sc_nexus->ds); 1416 #endif 1417 1418 siop_start(sc, acb->xs->xs_periph->periph_target, 1419 acb->xs->xs_periph->periph_lun, 1420 (u_char *)&acb->cmd, acb->clen, acb->daddr, acb->dleft); 1421 1422 return; 1423 } 1424 1425 /* 1426 * 53C710 interrupt handler 1427 */ 1428 1429 void 1430 siopintr(register struct siop_softc *sc) 1431 { 1432 siop_regmap_p rp; 1433 register u_char istat, dstat, sstat0; 1434 int status; 1435 int s = splbio(); 1436 1437 istat = sc->sc_istat; 1438 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { 1439 splx(s); 1440 return; 1441 } 1442 1443 /* Got a valid interrupt on this device */ 1444 rp = sc->sc_siopp; 1445 dstat = sc->sc_dstat; 1446 sstat0 = sc->sc_sstat0; 1447 if (dstat & SIOP_DSTAT_SIR) 1448 sc->sc_intcode = rp->siop_dsps; 1449 sc->sc_istat = 0; 1450 #ifdef DEBUG 1451 if (siop_debug & 1) 1452 printf ("%s: intr istat %x dstat %x sstat0 %x\n", 1453 sc->sc_dev.dv_xname, istat, dstat, sstat0); 1454 if (!sc->sc_active) { 1455 printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x nexus %p status %x\n", 1456 sc->sc_dev.dv_xname, istat, dstat, sstat0, 1457 sc->sc_nexus, sc->sc_nexus ? sc->sc_nexus->stat[0] : 0); 1458 } 1459 #endif 1460 1461 #ifdef DEBUG 1462 if (siop_debug & 5) { 1463 DCIAS(kvtop(&sc->sc_nexus->stat[0])); 1464 printf ("%s: intr istat %x dstat %x sstat0 %x dsps %lx sbcl %x sts %x msg %x\n", 1465 sc->sc_dev.dv_xname, istat, dstat, sstat0, 1466 rp->siop_dsps, rp->siop_sbcl, 1467 sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]); 1468 } 1469 #endif 1470 if (sc->sc_flags & SIOP_INTDEFER) { 1471 sc->sc_flags &= ~(SIOP_INTDEFER | SIOP_INTSOFF); 1472 rp->siop_sien = sc->sc_sien; 1473 rp->siop_dien = sc->sc_dien; 1474 } 1475 if (siop_checkintr (sc, istat, dstat, sstat0, &status)) { 1476 #if 1 1477 if (status == 0xff) 1478 printf ("siopintr: status == 0xff\n"); 1479 #endif 1480 if ((sc->sc_flags & (SIOP_INTSOFF | SIOP_INTDEFER)) != SIOP_INTSOFF) { 1481 #if 0 1482 if (rp->siop_sbcl & SIOP_BSY) { 1483 printf ("%s: SCSI bus busy at completion", 1484 sc->sc_dev.dv_xname); 1485 printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n", 1486 sc->sc_nexus->xs->xs_periph->periph_target, 1487 rp->siop_sbcl, rp->siop_sfbr, rp->siop_lcrc, 1488 rp->siop_dsp - sc->sc_scriptspa); 1489 } 1490 #endif 1491 siop_scsidone(sc->sc_nexus, sc->sc_nexus ? 1492 sc->sc_nexus->stat[0] : -1); 1493 } 1494 } 1495 splx(s); 1496 } 1497 1498 /* 1499 * This is based on the Progressive Peripherals 33Mhz Zeus driver and will 1500 * not be correct for other 53c710 boards. 1501 * 1502 */ 1503 void 1504 scsi_period_to_siop(struct siop_softc *sc, int target) 1505 { 1506 int period, offset, sxfer, sbcl = 0; 1507 #ifdef DEBUG_SYNC 1508 int i; 1509 #endif 1510 1511 period = sc->sc_nexus->msg[4]; 1512 offset = sc->sc_nexus->msg[5]; 1513 #ifdef DEBUG_SYNC 1514 sxfer = 0; 1515 if (offset <= SIOP_MAX_OFFSET) 1516 sxfer = offset; 1517 for (i = 0; i < sizeof (sync_tab) / 2; ++i) { 1518 if (period <= sync_tab[i].p) { 1519 sxfer |= sync_tab[i].r & 0x70; 1520 sbcl = sync_tab[i].r & 0x03; 1521 break; 1522 } 1523 } 1524 printf ("siop sync old: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1525 #endif 1526 for (sbcl = 1; sbcl < 4; ++sbcl) { 1527 sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3; 1528 if (sxfer >= 0 && sxfer <= 7) 1529 break; 1530 } 1531 if (sbcl > 3) { 1532 printf("siop sync: unable to compute sync params for period %dns\n", 1533 period * 4); 1534 /* 1535 * XXX need to pick a value we can do and renegotiate 1536 */ 1537 sxfer = sbcl = 0; 1538 } else { 1539 sxfer = (sxfer << 4) | ((offset <= SIOP_MAX_OFFSET) ? 1540 offset : SIOP_MAX_OFFSET); 1541 #ifdef DEBUG_SYNC 1542 printf("siop sync: params for period %dns: sxfer %x sbcl %x", 1543 period * 4, sxfer, sbcl); 1544 printf(" actual period %dns\n", 1545 sc->sc_tcp[sbcl] * ((sxfer >> 4) + 4)); 1546 #endif 1547 } 1548 sc->sc_sync[target].sxfer = sxfer; 1549 sc->sc_sync[target].sbcl = sbcl; 1550 #ifdef DEBUG_SYNC 1551 printf ("siop sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl); 1552 #endif 1553 } 1554 1555 #ifdef DEBUG 1556 1557 #if SIOP_TRACE_SIZE 1558 void 1559 siop_dump_trace(void) 1560 { 1561 int i; 1562 1563 printf("siop trace: next index %d\n", siop_trix); 1564 i = siop_trix; 1565 do { 1566 printf("%3d: '%c' %02x %02x %02x\n", i, siop_trbuf[i], 1567 siop_trbuf[i + 1], siop_trbuf[i + 2], siop_trbuf[i + 3]); 1568 i = (i + 4) & (SIOP_TRACE_SIZE - 1); 1569 } while (i != siop_trix); 1570 } 1571 #endif 1572 1573 void 1574 siop_dump_acb(struct siop_acb *acb) 1575 { 1576 u_char *b = (u_char *) &acb->cmd; 1577 int i; 1578 1579 printf("acb@%p ", acb); 1580 if (acb->xs == NULL) { 1581 printf("<unused>\n"); 1582 return; 1583 } 1584 printf("(%d:%d) flags %2x clen %2d cmd ", 1585 acb->xs->xs_periph->periph_target, 1586 acb->xs->xs_periph->periph_lun, acb->flags, acb->clen); 1587 for (i = acb->clen; i; --i) 1588 printf(" %02x", *b++); 1589 printf("\n"); 1590 printf(" xs: %p data %p:%04x ", acb->xs, acb->xs->data, 1591 acb->xs->datalen); 1592 printf("va %p:%lx ", acb->iob_buf, acb->iob_len); 1593 printf("cur %lx:%lx\n", acb->iob_curbuf, acb->iob_curlen); 1594 } 1595 1596 void 1597 siop_dump(struct siop_softc *sc) 1598 { 1599 struct siop_acb *acb; 1600 siop_regmap_p rp = sc->sc_siopp; 1601 int s; 1602 int i; 1603 1604 s = splbio(); 1605 #if SIOP_TRACE_SIZE 1606 siop_dump_trace(); 1607 #endif 1608 printf("%s@%p regs %p istat %x\n", 1609 sc->sc_dev.dv_xname, sc, rp, rp->siop_istat); 1610 if ((acb = sc->free_list.tqh_first) > 0) { 1611 printf("Free list:\n"); 1612 while (acb) { 1613 siop_dump_acb(acb); 1614 acb = acb->chain.tqe_next; 1615 } 1616 } 1617 if ((acb = sc->ready_list.tqh_first) > 0) { 1618 printf("Ready list:\n"); 1619 while (acb) { 1620 siop_dump_acb(acb); 1621 acb = acb->chain.tqe_next; 1622 } 1623 } 1624 if ((acb = sc->nexus_list.tqh_first) > 0) { 1625 printf("Nexus list:\n"); 1626 while (acb) { 1627 siop_dump_acb(acb); 1628 acb = acb->chain.tqe_next; 1629 } 1630 } 1631 if (sc->sc_nexus) { 1632 printf("Nexus:\n"); 1633 siop_dump_acb(sc->sc_nexus); 1634 } 1635 for (i = 0; i < 8; ++i) { 1636 if (sc->sc_tinfo[i].cmds > 2) { 1637 printf("tgt %d: cmds %d disc %d lubusy %x\n", 1638 i, sc->sc_tinfo[i].cmds, 1639 sc->sc_tinfo[i].dconns, 1640 sc->sc_tinfo[i].lubusy); 1641 } 1642 } 1643 splx(s); 1644 } 1645 #endif 1646