sbic.c revision 1.71
1 /* $NetBSD: sbic.c,v 1.71 2012/10/27 17:17:30 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Van Jacobson of Lawrence Berkeley Laboratory. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)scsi.c 7.5 (Berkeley) 5/4/91 35 */ 36 37 /* 38 * Copyright (c) 1994 Christian E. Hopps 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Van Jacobson of Lawrence Berkeley Laboratory. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)scsi.c 7.5 (Berkeley) 5/4/91 72 */ 73 74 /* 75 * AMIGA AMD 33C93 scsi adaptor driver 76 */ 77 78 #include "opt_ddb.h" 79 #ifdef __m68k__ 80 #include "opt_m68k_arch.h" 81 #endif 82 83 #include <sys/cdefs.h> 84 __KERNEL_RCSID(0, "$NetBSD: sbic.c,v 1.71 2012/10/27 17:17:30 chs Exp $"); 85 86 #include <sys/param.h> 87 #include <sys/systm.h> 88 #include <sys/device.h> 89 #include <sys/kernel.h> /* For hz */ 90 #include <sys/disklabel.h> 91 #include <sys/buf.h> 92 #include <dev/scsipi/scsi_all.h> 93 #include <dev/scsipi/scsipi_all.h> 94 #include <dev/scsipi/scsiconf.h> 95 #include <machine/cpu.h> 96 #include <amiga/amiga/device.h> 97 #include <amiga/amiga/custom.h> 98 #include <amiga/amiga/isr.h> 99 #include <amiga/dev/dmavar.h> 100 #include <amiga/dev/sbicreg.h> 101 #include <amiga/dev/sbicvar.h> 102 103 /* These are for bounce buffers */ 104 #include <amiga/amiga/cc.h> 105 #include <amiga/dev/zbusvar.h> 106 107 /* Since I can't find this in any other header files */ 108 #define SCSI_PHASE(reg) (reg&0x07) 109 110 /* 111 * SCSI delays 112 * In u-seconds, primarily for state changes on the SPC. 113 */ 114 #define SBIC_CMD_WAIT 50000 /* wait per step of 'immediate' cmds */ 115 #define SBIC_DATA_WAIT 50000 /* wait per data in/out step */ 116 #define SBIC_INIT_WAIT 50000 /* wait per step (both) during init */ 117 118 #define SBIC_WAIT(regs, until, timeo) sbicwait(regs, until, timeo, __LINE__) 119 120 int sbicicmd(struct sbic_softc *, int, int, void *, int, void *, int); 121 int sbicgo(struct sbic_softc *, struct scsipi_xfer *); 122 int sbicdmaok(struct sbic_softc *, struct scsipi_xfer *); 123 int sbicwait(sbic_regmap_t, char, int , int); 124 int sbiccheckdmap(void *, u_long, u_long); 125 int sbicselectbus(struct sbic_softc *, sbic_regmap_t, u_char, u_char, u_char); 126 int sbicxfstart(sbic_regmap_t, int, u_char, int); 127 int sbicxfout(sbic_regmap_t regs, int, void *, int); 128 int sbicfromscsiperiod(struct sbic_softc *, sbic_regmap_t, int); 129 int sbictoscsiperiod(struct sbic_softc *, sbic_regmap_t, int); 130 int sbicpoll(struct sbic_softc *); 131 int sbicnextstate(struct sbic_softc *, u_char, u_char); 132 int sbicmsgin(struct sbic_softc *); 133 int sbicxfin(sbic_regmap_t regs, int, void *); 134 int sbicabort(struct sbic_softc *, sbic_regmap_t, const char *); 135 void sbicxfdone(struct sbic_softc *, sbic_regmap_t, int); 136 void sbicerror(struct sbic_softc *, sbic_regmap_t, u_char); 137 void sbicstart(struct sbic_softc *); 138 void sbicreset(struct sbic_softc *); 139 void sbic_scsidone(struct sbic_acb *, int); 140 void sbic_sched(struct sbic_softc *); 141 void sbic_save_ptrs(struct sbic_softc *, sbic_regmap_t,int,int); 142 void sbic_load_ptrs(struct sbic_softc *, sbic_regmap_t,int,int); 143 #ifdef DEBUG 144 void sbicdumpstate(void); 145 void sbic_dump_acb(struct sbic_acb *); 146 #endif 147 148 /* 149 * Synch xfer parameters, and timing conversions 150 */ 151 int sbic_min_period = SBIC_SYN_MIN_PERIOD; /* in cycles = f(ICLK,FSn) */ 152 int sbic_max_offset = SBIC_SYN_MAX_OFFSET; /* pure number */ 153 154 int sbic_cmd_wait = SBIC_CMD_WAIT; 155 int sbic_data_wait = SBIC_DATA_WAIT; 156 int sbic_init_wait = SBIC_INIT_WAIT; 157 158 /* 159 * was broken before.. now if you want this you get it for all drives 160 * on sbic controllers. 161 */ 162 u_char sbic_inhibit_sync[8]; 163 int sbic_enable_reselect = 1; 164 int sbic_clock_override = 0; 165 int sbic_no_dma = 0; 166 int sbic_parallel_operations = 1; 167 168 #ifdef DEBUG 169 sbic_regmap_t debug_sbic_regs; 170 int sbicdma_ops = 0; /* total DMA operations */ 171 int sbicdma_bounces = 0; /* number operations using bounce buffer */ 172 int sbicdma_hits = 0; /* number of DMA chains that were contiguous */ 173 int sbicdma_misses = 0; /* number of DMA chains that were not contiguous */ 174 int sbicdma_saves = 0; 175 #define QPRINTF(a) if (sbic_debug > 1) printf a 176 int sbic_debug = 0; 177 int sync_debug = 0; 178 int sbic_dma_debug = 0; 179 int reselect_debug = 0; 180 int data_pointer_debug = 0; 181 u_char debug_asr, debug_csr, routine; 182 void sbictimeout(struct sbic_softc *dev); 183 184 #define CSR_TRACE_SIZE 32 185 #if CSR_TRACE_SIZE 186 #define CSR_TRACE(w,c,a,x) do { \ 187 int s_csr_trace = splbio(); \ 188 csr_trace[csr_traceptr].whr = (w); csr_trace[csr_traceptr].csr = (c); \ 189 csr_trace[csr_traceptr].asr = (a); csr_trace[csr_traceptr].xtn = (x); \ 190 dma_cachectl((void *)&csr_trace[csr_traceptr], sizeof(csr_trace[0])); \ 191 csr_traceptr = (csr_traceptr + 1) & (CSR_TRACE_SIZE - 1); \ 192 /* dma_cachectl((void *)&csr_traceptr, sizeof(csr_traceptr));*/ \ 193 splx(s_csr_trace); \ 194 } while (0) 195 int csr_traceptr; 196 int csr_tracesize = CSR_TRACE_SIZE; 197 struct { 198 u_char whr; 199 u_char csr; 200 u_char asr; 201 u_char xtn; 202 } csr_trace[CSR_TRACE_SIZE]; 203 #else 204 #define CSR_TRACE(w,c,a,x) 205 #endif 206 207 #define SBIC_TRACE_SIZE 0 208 #if SBIC_TRACE_SIZE 209 #define SBIC_TRACE(dev) do { \ 210 int s = splbio(); \ 211 sbic_trace[sbic_traceptr].sp = &s; \ 212 sbic_trace[sbic_traceptr].line = __LINE__; \ 213 sbic_trace[sbic_traceptr].sr = s; \ 214 sbic_trace[sbic_traceptr].csr = csr_traceptr; \ 215 dma_cachectl(&sbic_trace[sbic_traceptr], sizeof(sbic_trace[0])); \ 216 sbic_traceptr = (sbic_traceptr + 1) & (SBIC_TRACE_SIZE - 1); \ 217 dma_cachectl(&sbic_traceptr, sizeof(sbic_traceptr)); \ 218 if (dev) dma_cachectl(dev, sizeof(*dev)); \ 219 splx(s); \ 220 } while (0) 221 int sbic_traceptr; 222 int sbic_tracesize = SBIC_TRACE_SIZE; 223 struct { 224 void *sp; 225 u_short line; 226 u_short sr; 227 int csr; 228 } sbic_trace[SBIC_TRACE_SIZE]; 229 #else 230 #define SBIC_TRACE(dev) 231 #endif 232 233 #else /* DEBUG */ 234 #define QPRINTF(a) 235 #define CSR_TRACE(w,c,a,x) 236 #define SBIC_TRACE(dev) 237 #endif /* DEBUG */ 238 239 /* 240 * default minphys routine for sbic based controllers 241 */ 242 void 243 sbic_minphys(struct buf *bp) 244 { 245 246 /* 247 * No max transfer at this level. 248 */ 249 minphys(bp); 250 } 251 252 /* 253 * Save DMA pointers. Take into account partial transfer. Shut down DMA. 254 */ 255 void 256 sbic_save_ptrs(struct sbic_softc *dev, sbic_regmap_t regs, int target, int lun) 257 { 258 int count, asr, s; 259 struct sbic_acb* acb; 260 261 SBIC_TRACE(dev); 262 if( !dev->sc_cur ) return; 263 if( !(dev->sc_flags & SBICF_INDMA) ) return; /* DMA not active */ 264 265 s = splbio(); 266 267 acb = dev->sc_nexus; 268 count = -1; 269 do { 270 GET_SBIC_asr(regs, asr); 271 if( asr & SBIC_ASR_DBR ) { 272 printf("sbic_save_ptrs: asr %02x canceled!\n", asr); 273 splx(s); 274 SBIC_TRACE(dev); 275 return; 276 } 277 } while( asr & (SBIC_ASR_BSY|SBIC_ASR_CIP) ); 278 279 /* Save important state */ 280 /* must be done before dmastop */ 281 acb->sc_dmacmd = dev->sc_dmacmd; 282 SBIC_TC_GET(regs, count); 283 284 /* Shut down DMA ====CAREFUL==== */ 285 dev->sc_dmastop(dev); 286 dev->sc_flags &= ~SBICF_INDMA; 287 SBIC_TC_PUT(regs, 0); 288 289 #ifdef DEBUG 290 if(!count && sbic_debug) printf("%dcount0",target); 291 if(data_pointer_debug == -1) 292 printf("SBIC saving target %d data pointers from (%p,%x)%xASR:%02x", 293 target, dev->sc_cur->dc_addr, dev->sc_cur->dc_count, 294 acb->sc_dmacmd, asr); 295 #endif 296 297 /* Fixup partial xfers */ 298 acb->sc_kv.dc_addr += (dev->sc_tcnt - count); 299 acb->sc_kv.dc_count -= (dev->sc_tcnt - count); 300 acb->sc_pa.dc_addr += (dev->sc_tcnt - count); 301 acb->sc_pa.dc_count -= ((dev->sc_tcnt - count)>>1); 302 303 acb->sc_tcnt = dev->sc_tcnt = count; 304 #ifdef DEBUG 305 if(data_pointer_debug) 306 printf(" at (%p,%x):%x\n", 307 dev->sc_cur->dc_addr, dev->sc_cur->dc_count,count); 308 sbicdma_saves++; 309 #endif 310 splx(s); 311 SBIC_TRACE(dev); 312 } 313 314 315 /* 316 * DOES NOT RESTART DMA!!! 317 */ 318 void 319 sbic_load_ptrs(struct sbic_softc *dev, sbic_regmap_t regs, int target, int lun) 320 { 321 int s, count; 322 char* vaddr, * paddr; 323 struct sbic_acb *acb; 324 325 SBIC_TRACE(dev); 326 acb = dev->sc_nexus; 327 if( !acb->sc_kv.dc_count ) { 328 /* No data to xfer */ 329 SBIC_TRACE(dev); 330 return; 331 } 332 333 s = splbio(); 334 335 dev->sc_last = dev->sc_cur = &acb->sc_pa; 336 dev->sc_tcnt = acb->sc_tcnt; 337 dev->sc_dmacmd = acb->sc_dmacmd; 338 339 #ifdef DEBUG 340 sbicdma_ops++; 341 #endif 342 if( !dev->sc_tcnt ) { 343 /* sc_tcnt == 0 implies end of segment */ 344 345 /* do kvm to pa mappings */ 346 paddr = acb->sc_pa.dc_addr = 347 (char *) kvtop(acb->sc_kv.dc_addr); 348 349 vaddr = acb->sc_kv.dc_addr; 350 count = acb->sc_kv.dc_count; 351 for(count = (PAGE_SIZE - ((int)vaddr & PGOFSET)); 352 count < acb->sc_kv.dc_count 353 && (char*)kvtop(vaddr + count + 4) == paddr + count + 4; 354 count += PAGE_SIZE); 355 /* If it's all contiguous... */ 356 if(count > acb->sc_kv.dc_count ) { 357 count = acb->sc_kv.dc_count; 358 #ifdef DEBUG 359 sbicdma_hits++; 360 #endif 361 } else { 362 #ifdef DEBUG 363 sbicdma_misses++; 364 #endif 365 } 366 acb->sc_tcnt = count; 367 acb->sc_pa.dc_count = count >> 1; 368 369 #ifdef DEBUG 370 if(data_pointer_debug) 371 printf("DMA recalc:kv(%p,%x)pa(%p,%lx)\n", 372 acb->sc_kv.dc_addr, 373 acb->sc_kv.dc_count, 374 acb->sc_pa.dc_addr, 375 acb->sc_tcnt); 376 #endif 377 } 378 splx(s); 379 #ifdef DEBUG 380 if(data_pointer_debug) 381 printf("SBIC restoring target %d data pointers at (%p,%x)%x\n", 382 target, dev->sc_cur->dc_addr, dev->sc_cur->dc_count, 383 dev->sc_dmacmd); 384 #endif 385 SBIC_TRACE(dev); 386 } 387 388 /* 389 * used by specific sbic controller 390 * 391 * it appears that the higher level code does nothing with LUN's 392 * so I will too. I could plug it in, however so could they 393 * in scsi_scsipi_cmd(). 394 */ 395 void 396 sbic_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 397 void *arg) 398 { 399 struct scsipi_xfer *xs; 400 struct scsipi_periph *periph; 401 struct sbic_acb *acb; 402 struct sbic_softc *dev = device_private(chan->chan_adapter->adapt_dev); 403 int flags, s, stat; 404 405 switch (req) { 406 case ADAPTER_REQ_RUN_XFER: 407 xs = arg; 408 periph = xs->xs_periph; 409 410 SBIC_TRACE(dev); 411 flags = xs->xs_control; 412 413 if (flags & XS_CTL_DATA_UIO) 414 panic("sbic: scsi data uio requested"); 415 416 if (dev->sc_nexus && flags & XS_CTL_POLL) 417 panic("sbic_scsipi_request: busy"); 418 419 s = splbio(); 420 acb = dev->free_list.tqh_first; 421 if (acb) 422 TAILQ_REMOVE(&dev->free_list, acb, chain); 423 splx(s); 424 425 #ifdef DIAGNOSTIC 426 if (acb == NULL) { 427 scsipi_printaddr(periph); 428 printf("unable to allocate acb\n"); 429 panic("sbic_scsipi_request"); 430 } 431 #endif 432 acb->flags = ACB_ACTIVE; 433 if (flags & XS_CTL_DATA_IN) 434 acb->flags |= ACB_DATAIN; 435 acb->xs = xs; 436 memcpy(&acb->cmd, xs->cmd, xs->cmdlen); 437 acb->clen = xs->cmdlen; 438 acb->sc_kv.dc_addr = xs->data; 439 acb->sc_kv.dc_count = xs->datalen; 440 acb->pa_addr = xs->data ? (char *)kvtop(xs->data) : 0; /* XXXX check */ 441 442 if (flags & XS_CTL_POLL) { 443 s = splbio(); 444 /* 445 * This has major side effects - it locks up the machine 446 */ 447 448 dev->sc_flags |= SBICF_ICMD; 449 do { 450 while(dev->sc_nexus) 451 sbicpoll(dev); 452 dev->sc_nexus = acb; 453 dev->sc_stat[0] = -1; 454 dev->sc_xs = xs; 455 dev->target = periph->periph_target; 456 dev->lun = periph->periph_lun; 457 stat = sbicicmd(dev, dev->target, dev->lun, 458 &acb->cmd, acb->clen, 459 acb->sc_kv.dc_addr, acb->sc_kv.dc_count); 460 } while (dev->sc_nexus != acb); 461 sbic_scsidone(acb, stat); 462 463 splx(s); 464 SBIC_TRACE(dev); 465 return; 466 } 467 468 s = splbio(); 469 TAILQ_INSERT_TAIL(&dev->ready_list, acb, chain); 470 471 if (dev->sc_nexus) { 472 splx(s); 473 SBIC_TRACE(dev); 474 return; 475 } 476 477 /* 478 * nothing is active, try to start it now. 479 */ 480 sbic_sched(dev); 481 splx(s); 482 483 SBIC_TRACE(dev); 484 /* TODO: add sbic_poll to do XS_CTL_POLL operations */ 485 #if 0 486 if (flags & XS_CTL_POLL) 487 return(COMPLETE); 488 #endif 489 return; 490 491 case ADAPTER_REQ_GROW_RESOURCES: 492 return; 493 494 case ADAPTER_REQ_SET_XFER_MODE: 495 return; 496 } 497 } 498 499 /* 500 * attempt to start the next available command 501 */ 502 void 503 sbic_sched(struct sbic_softc *dev) 504 { 505 struct scsipi_xfer *xs; 506 struct scsipi_periph *periph; 507 struct sbic_acb *acb; 508 int flags, /*phase,*/ stat, i; 509 510 SBIC_TRACE(dev); 511 if (dev->sc_nexus) 512 return; /* a command is current active */ 513 514 SBIC_TRACE(dev); 515 for (acb = dev->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) { 516 periph = acb->xs->xs_periph; 517 i = periph->periph_target; 518 if (!(dev->sc_tinfo[i].lubusy & (1 << periph->periph_lun))) { 519 struct sbic_tinfo *ti = &dev->sc_tinfo[i]; 520 521 TAILQ_REMOVE(&dev->ready_list, acb, chain); 522 dev->sc_nexus = acb; 523 ti = &dev->sc_tinfo[periph->periph_target]; 524 ti->lubusy |= (1 << periph->periph_lun); 525 acb->sc_pa.dc_addr = acb->pa_addr; /* XXXX check */ 526 break; 527 } 528 } 529 530 SBIC_TRACE(dev); 531 if (acb == NULL) 532 return; /* did not find an available command */ 533 534 dev->sc_xs = xs = acb->xs; 535 periph = xs->xs_periph; 536 flags = xs->xs_control; 537 538 if (flags & XS_CTL_RESET) 539 sbicreset(dev); 540 541 #ifdef DEBUG 542 if( data_pointer_debug > 1 ) 543 printf("sbic_sched(%d,%d)\n", periph->periph_target, 544 periph->periph_lun); 545 #endif 546 dev->sc_stat[0] = -1; 547 dev->target = periph->periph_target; 548 dev->lun = periph->periph_lun; 549 if ( flags & XS_CTL_POLL || ( !sbic_parallel_operations 550 && (sbicdmaok(dev, xs) == 0))) 551 stat = sbicicmd(dev, periph->periph_target, 552 periph->periph_lun, &acb->cmd, 553 acb->clen, acb->sc_kv.dc_addr, acb->sc_kv.dc_count); 554 else if (sbicgo(dev, xs) == 0 && xs->error != XS_SELTIMEOUT) { 555 SBIC_TRACE(dev); 556 return; 557 } else 558 stat = dev->sc_stat[0]; 559 560 sbic_scsidone(acb, stat); 561 SBIC_TRACE(dev); 562 } 563 564 void 565 sbic_scsidone(struct sbic_acb *acb, int stat) 566 { 567 struct scsipi_xfer *xs; 568 struct scsipi_periph *periph; 569 struct sbic_softc *dev; 570 int dosched = 0; 571 572 xs = acb->xs; 573 periph = xs->xs_periph; 574 dev = device_private(periph->periph_channel->chan_adapter->adapt_dev); 575 SBIC_TRACE(dev); 576 #ifdef DIAGNOSTIC 577 if (acb == NULL || xs == NULL) { 578 printf("sbic_scsidone -- (%d,%d) no scsi_xfer\n", 579 dev->target, dev->lun); 580 #ifdef DDB 581 Debugger(); 582 #endif 583 return; 584 } 585 #endif 586 587 xs->status = stat; 588 xs->resid = 0; /* XXXX */ 589 #ifdef DEBUG 590 if( data_pointer_debug > 1 ) 591 printf("scsidone: (%d,%d)->(%d,%d)%02x\n", 592 periph->periph_target, periph->periph_lun, 593 dev->target, dev->lun, stat); 594 if( periph->periph_target == 595 periph->periph_channel->chan_id) 596 panic("target == hostid"); 597 #endif 598 599 if (xs->error == XS_NOERROR) { 600 if (stat == SCSI_CHECK || stat == SCSI_BUSY) 601 xs->error = XS_BUSY; 602 } 603 604 /* 605 * Remove the ACB from whatever queue it's on. We have to do a bit of 606 * a hack to figure out which queue it's on. Note that it is *not* 607 * necessary to cdr down the ready queue, but we must cdr down the 608 * nexus queue and see if it's there, so we can mark the unit as no 609 * longer busy. This code is sickening, but it works. 610 */ 611 if (acb == dev->sc_nexus) { 612 dev->sc_nexus = NULL; 613 dev->sc_xs = NULL; 614 dev->sc_tinfo[periph->periph_target].lubusy &= 615 ~(1<<periph->periph_lun); 616 if (dev->ready_list.tqh_first) 617 dosched = 1; /* start next command */ 618 } else if (dev->ready_list.tqh_last == &acb->chain.tqe_next) { 619 TAILQ_REMOVE(&dev->ready_list, acb, chain); 620 } else { 621 register struct sbic_acb *acb2; 622 for (acb2 = dev->nexus_list.tqh_first; acb2; 623 acb2 = acb2->chain.tqe_next) { 624 if (acb2 == acb) { 625 TAILQ_REMOVE(&dev->nexus_list, acb, chain); 626 dev->sc_tinfo[periph->periph_target].lubusy 627 &= ~(1<<periph->periph_lun); 628 break; 629 } 630 } 631 if (acb2) 632 ; 633 else if (acb->chain.tqe_next) { 634 TAILQ_REMOVE(&dev->ready_list, acb, chain); 635 } else { 636 printf("%s: can't find matching acb\n", 637 device_xname(dev->sc_dev)); 638 #ifdef DDB 639 Debugger(); 640 #endif 641 } 642 } 643 /* Put it on the free list. */ 644 acb->flags = ACB_FREE; 645 TAILQ_INSERT_HEAD(&dev->free_list, acb, chain); 646 647 dev->sc_tinfo[periph->periph_target].cmds++; 648 649 scsipi_done(xs); 650 651 if (dosched) 652 sbic_sched(dev); 653 SBIC_TRACE(dev); 654 } 655 656 int 657 sbicdmaok(struct sbic_softc *dev, struct scsipi_xfer *xs) 658 { 659 if (sbic_no_dma || !xs->datalen || xs->datalen & 0x1 || 660 (u_int)xs->data & 0x3) 661 return(0); 662 /* 663 * controller supports dma to any addresses? 664 */ 665 else if ((dev->sc_flags & SBICF_BADDMA) == 0) 666 return(1); 667 /* 668 * this address is ok for DMA? 669 */ 670 else if (sbiccheckdmap(xs->data, xs->datalen, dev->sc_dmamask) == 0) 671 return(1); 672 /* 673 * we have a bounce buffer? 674 */ 675 else if (dev->sc_tinfo[xs->xs_periph->periph_target].bounce) 676 return(1); 677 /* 678 * try to get one 679 */ 680 else if ((dev->sc_tinfo[xs->xs_periph->periph_target].bounce 681 = (char *)alloc_z2mem(MAXPHYS))) { 682 if (isztwomem(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)) 683 printf("alloc ZII target %d bounce pa 0x%x\n", 684 xs->xs_periph->periph_target, 685 (unsigned)kvtop(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)); 686 else if (dev->sc_tinfo[xs->xs_periph->periph_target].bounce) 687 printf("alloc CHIP target %d bounce pa %p\n", 688 xs->xs_periph->periph_target, 689 PREP_DMA_MEM(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)); 690 return(1); 691 } 692 693 return(0); 694 } 695 696 697 int 698 sbicwait(sbic_regmap_t regs, char until, int timeo, int line) 699 { 700 u_char val; 701 int csr; 702 703 SBIC_TRACE((struct sbic_softc *)0); 704 if (timeo == 0) 705 timeo = 1000000; /* some large value.. */ 706 707 GET_SBIC_asr(regs,val); 708 while ((val & until) == 0) { 709 if (timeo-- == 0) { 710 GET_SBIC_csr(regs, csr); 711 printf("sbicwait TIMEO @%d with asr=x%x csr=x%x\n", 712 line, val, csr); 713 #if defined(DDB) && defined(DEBUG) 714 Debugger(); 715 #endif 716 return(val); /* Maybe I should abort */ 717 break; 718 } 719 DELAY(1); 720 GET_SBIC_asr(regs,val); 721 } 722 SBIC_TRACE((struct sbic_softc *)0); 723 return(val); 724 } 725 726 int 727 sbicabort(struct sbic_softc *dev, sbic_regmap_t regs, const char *where) 728 { 729 u_char csr, asr; 730 731 GET_SBIC_asr(regs, asr); 732 GET_SBIC_csr(regs, csr); 733 734 printf ("%s: abort %s: csr = 0x%02x, asr = 0x%02x\n", 735 device_xname(dev->sc_dev), where, csr, asr); 736 737 738 #if 0 739 /* Clean up running command */ 740 if (dev->sc_nexus != NULL) { 741 dev->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 742 sbic_scsidone(dev->sc_nexus, dev->sc_stat[0]); 743 } 744 while (acb = dev->nexus_list.tqh_first) { 745 acb->xs->error = XS_DRIVER_STUFFUP; 746 sbic_scsidone(acb, -1 /*acb->stat[0]*/); 747 } 748 #endif 749 750 /* Clean up chip itself */ 751 if (dev->sc_flags & SBICF_SELECTED) { 752 while( asr & SBIC_ASR_DBR ) { 753 /* sbic is jammed w/data. need to clear it */ 754 /* But we don't know what direction it needs to go */ 755 GET_SBIC_data(regs, asr); 756 printf("%s: abort %s: clearing data buffer 0x%02x\n", 757 device_xname(dev->sc_dev), where, asr); 758 GET_SBIC_asr(regs, asr); 759 if( asr & SBIC_ASR_DBR ) /* Not the read direction, then */ 760 SET_SBIC_data(regs, asr); 761 GET_SBIC_asr(regs, asr); 762 } 763 WAIT_CIP(regs); 764 printf("%s: sbicabort - sending ABORT command\n", device_xname(dev->sc_dev)); 765 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 766 WAIT_CIP(regs); 767 768 GET_SBIC_asr(regs, asr); 769 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) { 770 /* ok, get more drastic.. */ 771 772 printf("%s: sbicabort - asr %x, trying to reset\n", device_xname(dev->sc_dev), asr); 773 sbicreset(dev); 774 dev->sc_flags &= ~SBICF_SELECTED; 775 return -1; 776 } 777 printf("%s: sbicabort - sending DISC command\n", device_xname(dev->sc_dev)); 778 SET_SBIC_cmd(regs, SBIC_CMD_DISC); 779 780 do { 781 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 782 GET_SBIC_csr (regs, csr); 783 CSR_TRACE('a',csr,asr,0); 784 } while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 785 && (csr != SBIC_CSR_CMD_INVALID)); 786 787 /* lets just hope it worked.. */ 788 dev->sc_flags &= ~SBICF_SELECTED; 789 } 790 return -1; 791 } 792 793 794 /* 795 * Initialize driver-private structures 796 */ 797 798 void 799 sbicinit(struct sbic_softc *dev) 800 { 801 sbic_regmap_t regs; 802 u_int i; 803 struct sbic_acb *acb; 804 u_int inhibit_sync; 805 806 extern u_long scsi_nosync; 807 extern int shift_nosync; 808 809 regs = dev->sc_sbic; 810 811 if ((dev->sc_flags & SBICF_ALIVE) == 0) { 812 TAILQ_INIT(&dev->ready_list); 813 TAILQ_INIT(&dev->nexus_list); 814 TAILQ_INIT(&dev->free_list); 815 callout_init(&dev->sc_timo_ch, 0); 816 dev->sc_nexus = NULL; 817 dev->sc_xs = NULL; 818 acb = dev->sc_acb; 819 memset(acb, 0, sizeof(dev->sc_acb)); 820 for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) { 821 TAILQ_INSERT_TAIL(&dev->free_list, acb, chain); 822 acb++; 823 } 824 memset(dev->sc_tinfo, 0, sizeof(dev->sc_tinfo)); 825 #ifdef DEBUG 826 /* make sure timeout is really not needed */ 827 callout_reset(&dev->sc_timo_ch, 30 * hz, 828 (void *)sbictimeout, dev); 829 #endif 830 831 } else panic("sbic: reinitializing driver!"); 832 833 dev->sc_flags |= SBICF_ALIVE; 834 dev->sc_flags &= ~SBICF_SELECTED; 835 836 /* initialize inhibit array */ 837 if (scsi_nosync) { 838 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff; 839 shift_nosync += 8; 840 #ifdef DEBUG 841 if (inhibit_sync) 842 printf("%s: Inhibiting synchronous transfer %02x\n", 843 device_xname(dev->sc_dev), inhibit_sync); 844 #endif 845 for (i = 0; i < 8; ++i) 846 if (inhibit_sync & (1 << i)) 847 sbic_inhibit_sync[i] = 1; 848 } 849 850 sbicreset(dev); 851 } 852 853 void 854 sbicreset(struct sbic_softc *dev) 855 { 856 sbic_regmap_t regs; 857 u_int my_id, s; 858 u_char csr; 859 #if 0 860 u_int i; 861 struct sbic_acb *acb; 862 #endif 863 864 regs = dev->sc_sbic; 865 #if 0 866 if (dev->sc_flags & SBICF_ALIVE) { 867 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 868 WAIT_CIP(regs); 869 } 870 #else 871 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 872 WAIT_CIP(regs); 873 #endif 874 s = splbio(); 875 my_id = dev->sc_channel.chan_id & SBIC_ID_MASK; 876 877 /* Enable advanced mode */ 878 my_id |= SBIC_ID_EAF /*| SBIC_ID_EHP*/ ; 879 SET_SBIC_myid(regs, my_id); 880 881 /* 882 * Disable interrupts (in dmainit) then reset the chip 883 */ 884 SET_SBIC_cmd(regs, SBIC_CMD_RESET); 885 DELAY(25); 886 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 887 GET_SBIC_csr(regs, csr); /* clears interrupt also */ 888 889 if (dev->sc_clkfreq < 110) 890 my_id |= SBIC_ID_FS_8_10; 891 else if (dev->sc_clkfreq < 160) 892 my_id |= SBIC_ID_FS_12_15; 893 else if (dev->sc_clkfreq < 210) 894 my_id |= SBIC_ID_FS_16_20; 895 896 SET_SBIC_myid(regs, my_id); 897 898 /* 899 * Set up various chip parameters 900 */ 901 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /* | SBIC_CTL_HSP */ 902 | SBIC_MACHINE_DMA_MODE); 903 /* 904 * don't allow (re)selection (SBIC_RID_ES) 905 * until we can handle target mode!! 906 */ 907 SET_SBIC_rselid(regs, SBIC_RID_ER); 908 SET_SBIC_syn(regs, 0); /* asynch for now */ 909 910 /* 911 * anything else was zeroed by reset 912 */ 913 splx(s); 914 915 #if 0 916 if ((dev->sc_flags & SBICF_ALIVE) == 0) { 917 TAILQ_INIT(&dev->ready_list); 918 TAILQ_INIT(&dev->nexus_list); 919 TAILQ_INIT(&dev->free_list); 920 dev->sc_nexus = NULL; 921 dev->sc_xs = NULL; 922 acb = dev->sc_acb; 923 memset(acb, 0, sizeof(dev->sc_acb)); 924 for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) { 925 TAILQ_INSERT_TAIL(&dev->free_list, acb, chain); 926 acb++; 927 } 928 memset(dev->sc_tinfo, 0, sizeof(dev->sc_tinfo)); 929 } else { 930 if (dev->sc_nexus != NULL) { 931 dev->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 932 sbic_scsidone(dev->sc_nexus, dev->sc_stat[0]); 933 } 934 while (acb = dev->nexus_list.tqh_first) { 935 acb->xs->error = XS_DRIVER_STUFFUP; 936 sbic_scsidone(acb, -1 /*acb->stat[0]*/); 937 } 938 } 939 940 dev->sc_flags |= SBICF_ALIVE; 941 #endif 942 dev->sc_flags &= ~SBICF_SELECTED; 943 } 944 945 void 946 sbicerror(struct sbic_softc *dev, sbic_regmap_t regs, u_char csr) 947 { 948 struct scsipi_xfer *xs; 949 950 xs = dev->sc_xs; 951 952 #ifdef DIAGNOSTIC 953 if (xs == NULL) 954 panic("sbicerror"); 955 #endif 956 if (xs->xs_control & XS_CTL_SILENT) 957 return; 958 959 printf("%s: ", device_xname(dev->sc_dev)); 960 printf("csr == 0x%02x\n", csr); /* XXX */ 961 } 962 963 /* 964 * select the bus, return when selected or error. 965 */ 966 int 967 sbicselectbus(struct sbic_softc *dev, sbic_regmap_t regs, u_char target, 968 u_char lun, u_char our_addr) 969 { 970 u_char asr, csr, id; 971 972 SBIC_TRACE(dev); 973 QPRINTF(("sbicselectbus %d\n", target)); 974 975 /* 976 * if we're already selected, return (XXXX panic maybe?) 977 */ 978 if (dev->sc_flags & SBICF_SELECTED) { 979 SBIC_TRACE(dev); 980 return(1); 981 } 982 983 /* 984 * issue select 985 */ 986 SBIC_TC_PUT(regs, 0); 987 SET_SBIC_selid(regs, target); 988 SET_SBIC_timeo(regs, SBIC_TIMEOUT(250,dev->sc_clkfreq)); 989 990 /* 991 * set sync or async 992 */ 993 if (dev->sc_sync[target].state == SYNC_DONE) 994 SET_SBIC_syn(regs, SBIC_SYN (dev->sc_sync[target].offset, 995 dev->sc_sync[target].period)); 996 else 997 SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period)); 998 999 GET_SBIC_asr(regs, asr); 1000 if( asr & (SBIC_ASR_INT|SBIC_ASR_BSY) ) { 1001 /* This means we got ourselves reselected upon */ 1002 /* printf("sbicselectbus: INT/BSY asr %02x\n", asr);*/ 1003 #ifdef DDB 1004 /* Debugger();*/ 1005 #endif 1006 SBIC_TRACE(dev); 1007 return 1; 1008 } 1009 1010 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN); 1011 1012 /* 1013 * wait for select (merged from separate function may need 1014 * cleanup) 1015 */ 1016 WAIT_CIP(regs); 1017 do { 1018 asr = SBIC_WAIT(regs, SBIC_ASR_INT | SBIC_ASR_LCI, 0); 1019 if (asr & SBIC_ASR_LCI) { 1020 #ifdef DEBUG 1021 if (reselect_debug) 1022 printf("sbicselectbus: late LCI asr %02x\n", asr); 1023 #endif 1024 SBIC_TRACE(dev); 1025 return 1; 1026 } 1027 GET_SBIC_csr (regs, csr); 1028 CSR_TRACE('s',csr,asr,target); 1029 QPRINTF(("%02x ", csr)); 1030 if( csr == SBIC_CSR_RSLT_NI || csr == SBIC_CSR_RSLT_IFY) { 1031 #ifdef DEBUG 1032 if(reselect_debug) 1033 printf("sbicselectbus: reselected asr %02x\n", asr); 1034 #endif 1035 /* We need to handle this now so we don't lock up later */ 1036 sbicnextstate(dev, csr, asr); 1037 SBIC_TRACE(dev); 1038 return 1; 1039 } 1040 if( csr == SBIC_CSR_SLT || csr == SBIC_CSR_SLT_ATN) { 1041 panic("sbicselectbus: target issued select!"); 1042 return 1; 1043 } 1044 } while (csr != (SBIC_CSR_MIS_2|MESG_OUT_PHASE) 1045 && csr != (SBIC_CSR_MIS_2|CMD_PHASE) && csr != SBIC_CSR_SEL_TIMEO); 1046 1047 /* Enable (or not) reselection */ 1048 if(!sbic_enable_reselect && dev->nexus_list.tqh_first == NULL) 1049 SET_SBIC_rselid (regs, 0); 1050 else 1051 SET_SBIC_rselid (regs, SBIC_RID_ER); 1052 1053 if (csr == (SBIC_CSR_MIS_2|CMD_PHASE)) { 1054 dev->sc_flags |= SBICF_SELECTED; /* device ignored ATN */ 1055 GET_SBIC_selid(regs, id); 1056 dev->target = id; 1057 GET_SBIC_tlun(regs,dev->lun); 1058 if( dev->lun & SBIC_TLUN_VALID ) 1059 dev->lun &= SBIC_TLUN_MASK; 1060 else 1061 dev->lun = lun; 1062 } else if (csr == (SBIC_CSR_MIS_2|MESG_OUT_PHASE)) { 1063 /* 1064 * Send identify message 1065 * (SCSI-2 requires an identify msg (?)) 1066 */ 1067 GET_SBIC_selid(regs, id); 1068 dev->target = id; 1069 GET_SBIC_tlun(regs,dev->lun); 1070 if( dev->lun & SBIC_TLUN_VALID ) 1071 dev->lun &= SBIC_TLUN_MASK; 1072 else 1073 dev->lun = lun; 1074 /* 1075 * handle drives that don't want to be asked 1076 * whether to go sync at all. 1077 */ 1078 if (sbic_inhibit_sync[id] 1079 && dev->sc_sync[id].state == SYNC_START) { 1080 #ifdef DEBUG 1081 if (sync_debug) 1082 printf("Forcing target %d asynchronous.\n", id); 1083 #endif 1084 dev->sc_sync[id].offset = 0; 1085 dev->sc_sync[id].period = sbic_min_period; 1086 dev->sc_sync[id].state = SYNC_DONE; 1087 } 1088 1089 1090 if (dev->sc_sync[id].state != SYNC_START){ 1091 if( dev->sc_xs->xs_control & XS_CTL_POLL 1092 || (dev->sc_flags & SBICF_ICMD) 1093 || !sbic_enable_reselect ) 1094 SEND_BYTE (regs, MSG_IDENTIFY | lun); 1095 else 1096 SEND_BYTE (regs, MSG_IDENTIFY_DR | lun); 1097 } else { 1098 /* 1099 * try to initiate a sync transfer. 1100 * So compose the sync message we're going 1101 * to send to the target 1102 */ 1103 1104 #ifdef DEBUG 1105 if (sync_debug) 1106 printf("Sending sync request to target %d ... ", 1107 id); 1108 #endif 1109 /* 1110 * setup scsi message sync message request 1111 */ 1112 dev->sc_msg[0] = MSG_IDENTIFY | lun; 1113 dev->sc_msg[1] = MSG_EXT_MESSAGE; 1114 dev->sc_msg[2] = 3; 1115 dev->sc_msg[3] = MSG_SYNC_REQ; 1116 dev->sc_msg[4] = sbictoscsiperiod(dev, regs, 1117 sbic_min_period); 1118 dev->sc_msg[5] = sbic_max_offset; 1119 1120 if (sbicxfstart(regs, 6, MESG_OUT_PHASE, sbic_cmd_wait)) 1121 sbicxfout(regs, 6, dev->sc_msg, MESG_OUT_PHASE); 1122 1123 dev->sc_sync[id].state = SYNC_SENT; 1124 #ifdef DEBUG 1125 if (sync_debug) 1126 printf ("sent\n"); 1127 #endif 1128 } 1129 1130 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 1131 GET_SBIC_csr (regs, csr); 1132 CSR_TRACE('y',csr,asr,target); 1133 QPRINTF(("[%02x]", csr)); 1134 #ifdef DEBUG 1135 if (sync_debug && dev->sc_sync[id].state == SYNC_SENT) 1136 printf("csr-result of last msgout: 0x%x\n", csr); 1137 #endif 1138 1139 if (csr != SBIC_CSR_SEL_TIMEO) 1140 dev->sc_flags |= SBICF_SELECTED; 1141 } 1142 if (csr == SBIC_CSR_SEL_TIMEO) 1143 dev->sc_xs->error = XS_SELTIMEOUT; 1144 1145 QPRINTF(("\n")); 1146 1147 SBIC_TRACE(dev); 1148 return(csr == SBIC_CSR_SEL_TIMEO); 1149 } 1150 1151 int 1152 sbicxfstart(sbic_regmap_t regs, int len, u_char phase, int wait) 1153 { 1154 u_char id; 1155 1156 switch (phase) { 1157 case DATA_IN_PHASE: 1158 case MESG_IN_PHASE: 1159 GET_SBIC_selid (regs, id); 1160 id |= SBIC_SID_FROM_SCSI; 1161 SET_SBIC_selid (regs, id); 1162 SBIC_TC_PUT (regs, (unsigned)len); 1163 break; 1164 case DATA_OUT_PHASE: 1165 case MESG_OUT_PHASE: 1166 case CMD_PHASE: 1167 GET_SBIC_selid (regs, id); 1168 id &= ~SBIC_SID_FROM_SCSI; 1169 SET_SBIC_selid (regs, id); 1170 SBIC_TC_PUT (regs, (unsigned)len); 1171 break; 1172 default: 1173 SBIC_TC_PUT (regs, 0); 1174 } 1175 QPRINTF(("sbicxfstart %d, %d, %d\n", len, phase, wait)); 1176 1177 return(1); 1178 } 1179 1180 int 1181 sbicxfout(sbic_regmap_t regs, int len, void *bp, int phase) 1182 { 1183 u_char orig_csr, asr, *buf; 1184 int wait; 1185 1186 buf = bp; 1187 wait = sbic_data_wait; 1188 1189 QPRINTF(("sbicxfout {%d} %02x %02x %02x %02x %02x " 1190 "%02x %02x %02x %02x %02x\n", len, buf[0], buf[1], buf[2], 1191 buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9])); 1192 1193 GET_SBIC_csr (regs, orig_csr); 1194 CSR_TRACE('>',orig_csr,0,0); 1195 1196 /* 1197 * sigh.. WD-PROTO strikes again.. sending the command in one go 1198 * causes the chip to lock up if talking to certain (misbehaving?) 1199 * targets. Anyway, this procedure should work for all targets, but 1200 * it's slightly slower due to the overhead 1201 */ 1202 WAIT_CIP (regs); 1203 SET_SBIC_cmd (regs, SBIC_CMD_XFER_INFO); 1204 for (;len > 0; len--) { 1205 GET_SBIC_asr (regs, asr); 1206 while ((asr & SBIC_ASR_DBR) == 0) { 1207 if ((asr & SBIC_ASR_INT) || --wait < 0) { 1208 #ifdef DEBUG 1209 if (sbic_debug) 1210 printf("sbicxfout fail: l%d i%x w%d\n", 1211 len, asr, wait); 1212 #endif 1213 return (len); 1214 } 1215 /* DELAY(1);*/ 1216 GET_SBIC_asr (regs, asr); 1217 } 1218 1219 SET_SBIC_data (regs, *buf); 1220 buf++; 1221 } 1222 SBIC_TC_GET(regs, len); 1223 QPRINTF(("sbicxfout done %d bytes\n", len)); 1224 /* 1225 * this leaves with one csr to be read 1226 */ 1227 return(0); 1228 } 1229 1230 /* returns # bytes left to read */ 1231 int 1232 sbicxfin(sbic_regmap_t regs, int len, void *bp) 1233 { 1234 int wait; 1235 u_char *obp, *buf; 1236 u_char orig_csr, csr, asr; 1237 1238 wait = sbic_data_wait; 1239 obp = bp; 1240 buf = bp; 1241 1242 GET_SBIC_csr (regs, orig_csr); 1243 CSR_TRACE('<',orig_csr,0,0); 1244 1245 QPRINTF(("sbicxfin %d, csr=%02x\n", len, orig_csr)); 1246 1247 WAIT_CIP (regs); 1248 SET_SBIC_cmd (regs, SBIC_CMD_XFER_INFO); 1249 for (;len > 0; len--) { 1250 GET_SBIC_asr (regs, asr); 1251 if((asr & SBIC_ASR_PE)) { 1252 #ifdef DEBUG 1253 printf("sbicxfin parity error: l%d i%x w%d\n", 1254 len, asr, wait); 1255 /* return ((unsigned long)buf - (unsigned long)bp); */ 1256 #ifdef DDB 1257 Debugger(); 1258 #endif 1259 #endif 1260 } 1261 while ((asr & SBIC_ASR_DBR) == 0) { 1262 if ((asr & SBIC_ASR_INT) || --wait < 0) { 1263 #ifdef DEBUG 1264 if (sbic_debug) { 1265 QPRINTF(("sbicxfin fail:{%d} %02x %02x %02x %02x %02x %02x " 1266 "%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2], 1267 obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9])); 1268 printf("sbicxfin fail: l%d i%x w%d\n", 1269 len, asr, wait); 1270 } 1271 #endif 1272 return len; 1273 } 1274 1275 if (!(asr & SBIC_ASR_BSY)) { 1276 GET_SBIC_csr(regs, csr); 1277 CSR_TRACE('<',csr,asr,len); 1278 QPRINTF(("[CSR%02xASR%02x]", csr, asr)); 1279 } 1280 1281 /* DELAY(1);*/ 1282 GET_SBIC_asr (regs, asr); 1283 } 1284 1285 GET_SBIC_data (regs, *buf); 1286 /* QPRINTF(("asr=%02x, csr=%02x, data=%02x\n", asr, csr, *buf));*/ 1287 buf++; 1288 } 1289 1290 QPRINTF(("sbicxfin {%d} %02x %02x %02x %02x %02x %02x " 1291 "%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2], 1292 obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9])); 1293 1294 /* this leaves with one csr to be read */ 1295 return len; 1296 } 1297 1298 /* 1299 * SCSI 'immediate' command: issue a command to some SCSI device 1300 * and get back an 'immediate' response (i.e., do programmed xfer 1301 * to get the response data). 'cbuf' is a buffer containing a scsi 1302 * command of length clen bytes. 'buf' is a buffer of length 'len' 1303 * bytes for data. The transfer direction is determined by the device 1304 * (i.e., by the scsi bus data xfer phase). If 'len' is zero, the 1305 * command must supply no data. 1306 */ 1307 int 1308 sbicicmd(struct sbic_softc *dev, int target, int lun, void *cbuf, int clen, 1309 void *buf, int len) 1310 { 1311 sbic_regmap_t regs; 1312 u_char phase, csr, asr; 1313 int wait, i; 1314 struct sbic_acb *acb; 1315 1316 #define CSR_LOG_BUF_SIZE 0 1317 #if CSR_LOG_BUF_SIZE 1318 int bufptr; 1319 int csrbuf[CSR_LOG_BUF_SIZE]; 1320 bufptr=0; 1321 #endif 1322 1323 SBIC_TRACE(dev); 1324 regs = dev->sc_sbic; 1325 acb = dev->sc_nexus; 1326 1327 /* Make sure pointers are OK */ 1328 dev->sc_last = dev->sc_cur = &acb->sc_pa; 1329 dev->sc_tcnt = acb->sc_tcnt = 0; 1330 acb->sc_pa.dc_count = 0; /* No DMA */ 1331 acb->sc_kv.dc_addr = buf; 1332 acb->sc_kv.dc_count = len; 1333 1334 #ifdef DEBUG 1335 routine = 3; 1336 debug_sbic_regs = regs; /* store this to allow debug calls */ 1337 if( data_pointer_debug > 1 ) 1338 printf("sbicicmd(%d,%d):%d\n", target, lun, 1339 acb->sc_kv.dc_count); 1340 #endif 1341 1342 /* 1343 * set the sbic into non-DMA mode 1344 */ 1345 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /*| SBIC_CTL_HSP*/); 1346 1347 dev->sc_stat[0] = 0xff; 1348 dev->sc_msg[0] = 0xff; 1349 i = 1; /* pre-load */ 1350 1351 /* We're stealing the SCSI bus */ 1352 dev->sc_flags |= SBICF_ICMD; 1353 1354 do { 1355 /* 1356 * select the SCSI bus (it's an error if bus isn't free) 1357 */ 1358 if (!( dev->sc_flags & SBICF_SELECTED ) 1359 && sbicselectbus(dev, regs, target, lun, dev->sc_scsiaddr)) { 1360 /* printf("sbicicmd: trying to select busy bus!\n"); */ 1361 dev->sc_flags &= ~SBICF_ICMD; 1362 return(-1); 1363 } 1364 1365 /* 1366 * Wait for a phase change (or error) then let the device sequence 1367 * us through the various SCSI phases. 1368 */ 1369 1370 wait = sbic_cmd_wait; 1371 1372 GET_SBIC_asr (regs, asr); 1373 GET_SBIC_csr (regs, csr); 1374 CSR_TRACE('I',csr,asr,target); 1375 QPRINTF((">ASR:%02xCSR:%02x<", asr, csr)); 1376 1377 #if CSR_LOG_BUF_SIZE 1378 csrbuf[bufptr++] = csr; 1379 #endif 1380 1381 1382 switch (csr) { 1383 case SBIC_CSR_S_XFERRED: 1384 case SBIC_CSR_DISC: 1385 case SBIC_CSR_DISC_1: 1386 dev->sc_flags &= ~SBICF_SELECTED; 1387 GET_SBIC_cmd_phase (regs, phase); 1388 if (phase == 0x60) { 1389 GET_SBIC_tlun (regs, dev->sc_stat[0]); 1390 i = 0; /* done */ 1391 /* break; */ /* Bypass all the state gobldygook */ 1392 } else { 1393 #ifdef DEBUG 1394 if(reselect_debug>1) 1395 printf("sbicicmd: handling disconnect\n"); 1396 #endif 1397 i = SBIC_STATE_DISCONNECT; 1398 } 1399 break; 1400 1401 case SBIC_CSR_XFERRED|CMD_PHASE: 1402 case SBIC_CSR_MIS|CMD_PHASE: 1403 case SBIC_CSR_MIS_1|CMD_PHASE: 1404 case SBIC_CSR_MIS_2|CMD_PHASE: 1405 if (sbicxfstart(regs, clen, CMD_PHASE, sbic_cmd_wait)) 1406 if (sbicxfout(regs, clen, 1407 cbuf, CMD_PHASE)) 1408 i = sbicabort(dev, regs, "icmd sending cmd"); 1409 #if 0 1410 GET_SBIC_csr(regs, csr); /* Lets us reload tcount */ 1411 WAIT_CIP(regs); 1412 GET_SBIC_asr(regs, asr); 1413 CSR_TRACE('I',csr,asr,target); 1414 if( asr & (SBIC_ASR_BSY|SBIC_ASR_LCI|SBIC_ASR_CIP) ) 1415 printf("next: cmd sent asr %02x, csr %02x\n", 1416 asr, csr); 1417 #endif 1418 break; 1419 1420 #if 0 1421 case SBIC_CSR_XFERRED|DATA_OUT_PHASE: 1422 case SBIC_CSR_XFERRED|DATA_IN_PHASE: 1423 case SBIC_CSR_MIS|DATA_OUT_PHASE: 1424 case SBIC_CSR_MIS|DATA_IN_PHASE: 1425 case SBIC_CSR_MIS_1|DATA_OUT_PHASE: 1426 case SBIC_CSR_MIS_1|DATA_IN_PHASE: 1427 case SBIC_CSR_MIS_2|DATA_OUT_PHASE: 1428 case SBIC_CSR_MIS_2|DATA_IN_PHASE: 1429 if (acb->sc_kv.dc_count <= 0) 1430 i = sbicabort(dev, regs, "icmd out of data"); 1431 else { 1432 wait = sbic_data_wait; 1433 if (sbicxfstart(regs, 1434 acb->sc_kv.dc_count, 1435 SBIC_PHASE(csr), wait)) 1436 if (csr & 0x01) 1437 /* data in? */ 1438 i=sbicxfin(regs, 1439 acb->sc_kv.dc_count, 1440 acb->sc_kv.dc_addr); 1441 else 1442 i=sbicxfout(regs, 1443 acb->sc_kv.dc_count, 1444 acb->sc_kv.dc_addr, 1445 SBIC_PHASE(csr)); 1446 acb->sc_kv.dc_addr += 1447 (acb->sc_kv.dc_count - i); 1448 acb->sc_kv.dc_count = i; 1449 i = 1; 1450 } 1451 break; 1452 1453 #endif 1454 case SBIC_CSR_XFERRED|STATUS_PHASE: 1455 case SBIC_CSR_MIS|STATUS_PHASE: 1456 case SBIC_CSR_MIS_1|STATUS_PHASE: 1457 case SBIC_CSR_MIS_2|STATUS_PHASE: 1458 /* 1459 * the sbic does the status/cmd-complete reading ok, 1460 * so do this with its hi-level commands. 1461 */ 1462 #ifdef DEBUG 1463 if(sbic_debug) 1464 printf("SBICICMD status phase\n"); 1465 #endif 1466 SBIC_TC_PUT(regs, 0); 1467 SET_SBIC_cmd_phase(regs, 0x46); 1468 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER); 1469 break; 1470 1471 #if THIS_IS_A_RESERVED_STATE 1472 case BUS_FREE_PHASE: /* This is not legal */ 1473 if( dev->sc_stat[0] != 0xff ) 1474 goto out; 1475 break; 1476 #endif 1477 1478 default: 1479 i = sbicnextstate(dev, csr, asr); 1480 } 1481 1482 /* 1483 * make sure the last command was taken, 1484 * ie. we're not hunting after an ignored command.. 1485 */ 1486 GET_SBIC_asr(regs, asr); 1487 1488 /* tapes may take a loooong time.. */ 1489 while (asr & SBIC_ASR_BSY){ 1490 if(asr & SBIC_ASR_DBR) { 1491 printf("sbicicmd: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", 1492 csr,asr); 1493 #ifdef DDB 1494 Debugger(); 1495 #endif 1496 /* SBIC is jammed */ 1497 /* DUNNO which direction */ 1498 /* Try old direction */ 1499 GET_SBIC_data(regs,i); 1500 GET_SBIC_asr(regs, asr); 1501 if( asr & SBIC_ASR_DBR) /* Wants us to write */ 1502 SET_SBIC_data(regs,i); 1503 } 1504 GET_SBIC_asr(regs, asr); 1505 } 1506 1507 /* 1508 * wait for last command to complete 1509 */ 1510 if (asr & SBIC_ASR_LCI) { 1511 printf("sbicicmd: last command ignored\n"); 1512 } 1513 else if( i == 1 ) /* Bsy */ 1514 SBIC_WAIT (regs, SBIC_ASR_INT, wait); 1515 1516 /* 1517 * do it again 1518 */ 1519 } while ( i > 0 && dev->sc_stat[0] == 0xff); 1520 1521 /* Sometimes we need to do an extra read of the CSR */ 1522 GET_SBIC_csr(regs, csr); 1523 CSR_TRACE('I',csr,asr,0xff); 1524 1525 #if CSR_LOG_BUF_SIZE 1526 if(reselect_debug>1) 1527 for(i=0; i<bufptr; i++) 1528 printf("CSR:%02x", csrbuf[i]); 1529 #endif 1530 1531 #ifdef DEBUG 1532 if(data_pointer_debug > 1) 1533 printf("sbicicmd done(%d,%d):%d =%d=\n", 1534 dev->target, lun, 1535 acb->sc_kv.dc_count, 1536 dev->sc_stat[0]); 1537 #endif 1538 1539 QPRINTF(("=STS:%02x=", dev->sc_stat[0])); 1540 dev->sc_flags &= ~SBICF_ICMD; 1541 1542 SBIC_TRACE(dev); 1543 return(dev->sc_stat[0]); 1544 } 1545 1546 /* 1547 * Finish SCSI xfer command: After the completion interrupt from 1548 * a read/write operation, sequence through the final phases in 1549 * programmed i/o. This routine is a lot like sbicicmd except we 1550 * skip (and don't allow) the select, cmd out and data in/out phases. 1551 */ 1552 void 1553 sbicxfdone(struct sbic_softc *dev, sbic_regmap_t regs, int target) 1554 { 1555 u_char phase, asr, csr; 1556 int s; 1557 1558 SBIC_TRACE(dev); 1559 QPRINTF(("{")); 1560 s = splbio(); 1561 1562 /* 1563 * have the sbic complete on its own 1564 */ 1565 SBIC_TC_PUT(regs, 0); 1566 SET_SBIC_cmd_phase(regs, 0x46); 1567 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER); 1568 1569 do { 1570 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 1571 GET_SBIC_csr (regs, csr); 1572 CSR_TRACE('f',csr,asr,target); 1573 QPRINTF(("%02x:", csr)); 1574 } while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 1575 && (csr != SBIC_CSR_S_XFERRED)); 1576 1577 dev->sc_flags &= ~SBICF_SELECTED; 1578 1579 GET_SBIC_cmd_phase (regs, phase); 1580 QPRINTF(("}%02x", phase)); 1581 if (phase == 0x60) 1582 GET_SBIC_tlun(regs, dev->sc_stat[0]); 1583 else 1584 sbicerror(dev, regs, csr); 1585 1586 QPRINTF(("=STS:%02x=\n", dev->sc_stat[0])); 1587 splx(s); 1588 SBIC_TRACE(dev); 1589 } 1590 1591 /* 1592 * No DMA chains 1593 */ 1594 1595 int 1596 sbicgo(struct sbic_softc *dev, struct scsipi_xfer *xs) 1597 { 1598 int i, dmaflags, count, usedma; 1599 u_char csr, asr, *addr; 1600 sbic_regmap_t regs; 1601 struct sbic_acb *acb; 1602 1603 SBIC_TRACE(dev); 1604 dev->target = xs->xs_periph->periph_target; 1605 dev->lun = xs->xs_periph->periph_lun; 1606 acb = dev->sc_nexus; 1607 regs = dev->sc_sbic; 1608 1609 usedma = sbicdmaok(dev, xs); 1610 #ifdef DEBUG 1611 routine = 1; 1612 debug_sbic_regs = regs; /* store this to allow debug calls */ 1613 if( data_pointer_debug > 1 ) 1614 printf("sbicgo(%d,%d)\n", dev->target, dev->lun); 1615 #endif 1616 1617 /* 1618 * set the sbic into DMA mode 1619 */ 1620 if( usedma ) 1621 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI | 1622 SBIC_MACHINE_DMA_MODE); 1623 else 1624 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 1625 1626 1627 /* 1628 * select the SCSI bus (it's an error if bus isn't free) 1629 */ 1630 if (sbicselectbus(dev, regs, dev->target, dev->lun, 1631 dev->sc_scsiaddr)) { 1632 /* printf("sbicgo: Trying to select busy bus!\n"); */ 1633 SBIC_TRACE(dev); 1634 return(0); /* Not done: needs to be rescheduled */ 1635 } 1636 dev->sc_stat[0] = 0xff; 1637 1638 /* 1639 * Calculate DMA chains now 1640 */ 1641 1642 dmaflags = 0; 1643 if (acb->flags & ACB_DATAIN) 1644 dmaflags |= DMAGO_READ; 1645 1646 1647 /* 1648 * Deal w/bounce buffers. 1649 */ 1650 1651 addr = acb->sc_kv.dc_addr; 1652 count = acb->sc_kv.dc_count; 1653 if (count && (char *)kvtop(addr) != acb->sc_pa.dc_addr) { /* XXXX check */ 1654 printf("sbic: DMA buffer mapping changed %p->%x\n", 1655 acb->sc_pa.dc_addr, (unsigned)kvtop(addr)); 1656 #ifdef DDB 1657 Debugger(); 1658 #endif 1659 } 1660 1661 #ifdef DEBUG 1662 ++sbicdma_ops; /* count total DMA operations */ 1663 #endif 1664 if (count && usedma && dev->sc_flags & SBICF_BADDMA && 1665 sbiccheckdmap(addr, count, dev->sc_dmamask)) { 1666 /* 1667 * need to bounce the DMA. 1668 */ 1669 if (dmaflags & DMAGO_READ) { 1670 acb->flags |= ACB_BBUF; 1671 acb->sc_dmausrbuf = addr; 1672 acb->sc_dmausrlen = count; 1673 acb->sc_usrbufpa = (u_char *)kvtop(addr); 1674 if(!dev->sc_tinfo[dev->target].bounce) { 1675 printf("sbicgo: HELP! no bounce allocated for %d\n", 1676 dev->target); 1677 printf("xfer: (%p->%p,%lx)\n", acb->sc_dmausrbuf, 1678 acb->sc_usrbufpa, acb->sc_dmausrlen); 1679 dev->sc_tinfo[xs->xs_periph->periph_target].bounce 1680 = (char *)alloc_z2mem(MAXPHYS); 1681 if (isztwomem(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)) 1682 printf("alloc ZII target %d bounce pa 0x%x\n", 1683 xs->xs_periph->periph_target, 1684 (unsigned)kvtop(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)); 1685 else if (dev->sc_tinfo[xs->xs_periph->periph_target].bounce) 1686 printf("alloc CHIP target %d bounce pa %p\n", 1687 xs->xs_periph->periph_target, 1688 PREP_DMA_MEM(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)); 1689 1690 printf("Allocating %d bounce at %x\n", 1691 dev->target, 1692 (unsigned)kvtop(dev->sc_tinfo[dev->target].bounce)); 1693 } 1694 } else { /* write: copy to DMA buffer */ 1695 #ifdef DEBUG 1696 if(data_pointer_debug) 1697 printf("sbicgo: copying %x bytes to target %d bounce %x\n", 1698 count, dev->target, 1699 (unsigned)kvtop(dev->sc_tinfo[dev->target].bounce)); 1700 #endif 1701 bcopy (addr, dev->sc_tinfo[dev->target].bounce, count); 1702 } 1703 addr = dev->sc_tinfo[dev->target].bounce;/* and use DMA buffer */ 1704 acb->sc_kv.dc_addr = addr; 1705 #ifdef DEBUG 1706 ++sbicdma_bounces; /* count number of bounced */ 1707 #endif 1708 } 1709 1710 /* 1711 * Allocate the DMA chain 1712 */ 1713 1714 /* Set start KVM addresses */ 1715 #if 0 1716 acb->sc_kv.dc_addr = addr; 1717 acb->sc_kv.dc_count = count; 1718 #endif 1719 1720 /* Mark end of segment */ 1721 acb->sc_tcnt = dev->sc_tcnt = 0; 1722 acb->sc_pa.dc_count = 0; 1723 1724 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 1725 SBIC_TRACE(dev); 1726 /* Enable interrupts but don't do any DMA */ 1727 dev->sc_enintr(dev); 1728 if (usedma) { 1729 dev->sc_tcnt = dev->sc_dmago(dev, acb->sc_pa.dc_addr, 1730 acb->sc_pa.dc_count, 1731 dmaflags); 1732 #ifdef DEBUG 1733 dev->sc_dmatimo = dev->sc_tcnt ? 1 : 0; 1734 #endif 1735 } else 1736 dev->sc_dmacmd = 0; /* Don't use DMA */ 1737 dev->sc_flags |= SBICF_INDMA; 1738 /* SBIC_TC_PUT(regs, dev->sc_tcnt); */ /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */ 1739 SBIC_TRACE(dev); 1740 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 1741 1742 /* 1743 * push the data cache ( I think this won't work (EH)) 1744 */ 1745 #if defined(M68040) || defined(M68060) 1746 if (mmutype == MMU_68040 && usedma && count) { 1747 dma_cachectl(addr, count); 1748 if (((u_int)addr & 0xF) || (((u_int)addr + count) & 0xF)) 1749 dev->sc_flags |= SBICF_DCFLUSH; 1750 } 1751 #endif 1752 #ifdef __powerpc__ 1753 dma_cachectl(addr, count); 1754 #endif 1755 1756 /* 1757 * enintr() also enables interrupts for the sbic 1758 */ 1759 #ifdef DEBUG 1760 if( data_pointer_debug > 1 ) 1761 printf("sbicgo dmago:%d(%p:%lx)\n", 1762 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 1763 #if 0 1764 /* 1765 * Hmm - this isn't right: asr and csr haven't been set yet. 1766 */ 1767 debug_asr = asr; 1768 debug_csr = csr; 1769 #endif 1770 #endif 1771 1772 /* 1773 * Lets cycle a while then let the interrupt handler take over 1774 */ 1775 1776 GET_SBIC_asr(regs, asr); 1777 do { 1778 GET_SBIC_csr(regs, csr); 1779 CSR_TRACE('g',csr,asr,dev->target); 1780 #ifdef DEBUG 1781 debug_csr = csr; 1782 routine = 1; 1783 #endif 1784 QPRINTF(("go[0x%x]", csr)); 1785 1786 i = sbicnextstate(dev, csr, asr); 1787 1788 WAIT_CIP(regs); 1789 GET_SBIC_asr(regs, asr); 1790 #ifdef DEBUG 1791 debug_asr = asr; 1792 #endif 1793 if(asr & SBIC_ASR_LCI) printf("sbicgo: LCI asr:%02x csr:%02x\n", 1794 asr,csr); 1795 } while( i == SBIC_STATE_RUNNING 1796 && asr & (SBIC_ASR_INT|SBIC_ASR_LCI) ); 1797 1798 CSR_TRACE('g',csr,asr,i<<4); 1799 SBIC_TRACE(dev); 1800 if (i == SBIC_STATE_DONE && dev->sc_stat[0] == 0xff) printf("sbicgo: done & stat = 0xff\n"); 1801 if (i == SBIC_STATE_DONE && dev->sc_stat[0] != 0xff) { 1802 /* if( i == SBIC_STATE_DONE && dev->sc_stat[0] ) { */ 1803 /* Did we really finish that fast? */ 1804 return 1; 1805 } 1806 return 0; 1807 } 1808 1809 1810 int 1811 sbicintr(struct sbic_softc *dev) 1812 { 1813 sbic_regmap_t regs; 1814 u_char asr, csr; 1815 int i; 1816 1817 regs = dev->sc_sbic; 1818 1819 /* 1820 * pending interrupt? 1821 */ 1822 GET_SBIC_asr (regs, asr); 1823 if ((asr & SBIC_ASR_INT) == 0) 1824 return(0); 1825 1826 SBIC_TRACE(dev); 1827 do { 1828 GET_SBIC_csr(regs, csr); 1829 CSR_TRACE('i',csr,asr,dev->target); 1830 #ifdef DEBUG 1831 debug_csr = csr; 1832 routine = 2; 1833 #endif 1834 QPRINTF(("intr[0x%x]", csr)); 1835 1836 i = sbicnextstate(dev, csr, asr); 1837 1838 WAIT_CIP(regs); 1839 GET_SBIC_asr(regs, asr); 1840 #ifdef DEBUG 1841 debug_asr = asr; 1842 #endif 1843 #if 0 1844 if(asr & SBIC_ASR_LCI) printf("sbicintr: LCI asr:%02x csr:%02x\n", 1845 asr,csr); 1846 #endif 1847 } while(i == SBIC_STATE_RUNNING && 1848 asr & (SBIC_ASR_INT|SBIC_ASR_LCI)); 1849 CSR_TRACE('i',csr,asr,i<<4); 1850 SBIC_TRACE(dev); 1851 return(1); 1852 } 1853 1854 /* 1855 * Run commands and wait for disconnect 1856 */ 1857 int 1858 sbicpoll(struct sbic_softc *dev) 1859 { 1860 sbic_regmap_t regs; 1861 u_char asr, csr; 1862 int i; 1863 1864 SBIC_TRACE(dev); 1865 regs = dev->sc_sbic; 1866 1867 do { 1868 GET_SBIC_asr (regs, asr); 1869 #ifdef DEBUG 1870 debug_asr = asr; 1871 #endif 1872 GET_SBIC_csr(regs, csr); 1873 CSR_TRACE('p',csr,asr,dev->target); 1874 #ifdef DEBUG 1875 debug_csr = csr; 1876 routine = 2; 1877 #endif 1878 QPRINTF(("poll[0x%x]", csr)); 1879 1880 i = sbicnextstate(dev, csr, asr); 1881 1882 WAIT_CIP(regs); 1883 GET_SBIC_asr(regs, asr); 1884 /* tapes may take a loooong time.. */ 1885 while (asr & SBIC_ASR_BSY){ 1886 if(asr & SBIC_ASR_DBR) { 1887 printf("sbipoll: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", 1888 csr,asr); 1889 #ifdef DDB 1890 Debugger(); 1891 #endif 1892 /* SBIC is jammed */ 1893 /* DUNNO which direction */ 1894 /* Try old direction */ 1895 GET_SBIC_data(regs,i); 1896 GET_SBIC_asr(regs, asr); 1897 if( asr & SBIC_ASR_DBR) /* Wants us to write */ 1898 SET_SBIC_data(regs,i); 1899 } 1900 GET_SBIC_asr(regs, asr); 1901 } 1902 1903 if(asr & SBIC_ASR_LCI) printf("sbicpoll: LCI asr:%02x csr:%02x\n", 1904 asr,csr); 1905 else if( i == 1 ) /* BSY */ 1906 SBIC_WAIT(regs, SBIC_ASR_INT, sbic_cmd_wait); 1907 } while(i == SBIC_STATE_RUNNING); 1908 CSR_TRACE('p',csr,asr,i<<4); 1909 SBIC_TRACE(dev); 1910 return(1); 1911 } 1912 1913 /* 1914 * Handle a single msgin 1915 */ 1916 1917 int 1918 sbicmsgin(struct sbic_softc *dev) 1919 { 1920 sbic_regmap_t regs; 1921 int recvlen; 1922 u_char asr, csr, *tmpaddr; 1923 1924 regs = dev->sc_sbic; 1925 1926 dev->sc_msg[0] = 0xff; 1927 dev->sc_msg[1] = 0xff; 1928 1929 GET_SBIC_asr(regs, asr); 1930 #ifdef DEBUG 1931 if(reselect_debug>1) 1932 printf("sbicmsgin asr=%02x\n", asr); 1933 #endif 1934 1935 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 1936 1937 GET_SBIC_selid (regs, csr); 1938 SET_SBIC_selid (regs, csr | SBIC_SID_FROM_SCSI); 1939 1940 SBIC_TC_PUT(regs, 0); 1941 tmpaddr = dev->sc_msg; 1942 recvlen = 1; 1943 do { 1944 while( recvlen-- ) { 1945 GET_SBIC_asr(regs, asr); 1946 GET_SBIC_csr(regs, csr); 1947 QPRINTF(("sbicmsgin ready to go (csr,asr)=(%02x,%02x)\n", 1948 csr, asr)); 1949 1950 RECV_BYTE(regs, *tmpaddr); 1951 CSR_TRACE('m',csr,asr,*tmpaddr); 1952 #if 1 1953 /* 1954 * get the command completion interrupt, or we 1955 * can't send a new command (LCI) 1956 */ 1957 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 1958 GET_SBIC_csr(regs, csr); 1959 CSR_TRACE('X',csr,asr,dev->target); 1960 #else 1961 WAIT_CIP(regs); 1962 do { 1963 GET_SBIC_asr(regs, asr); 1964 csr = 0xff; 1965 GET_SBIC_csr(regs, csr); 1966 CSR_TRACE('X',csr,asr,dev->target); 1967 if( csr == 0xff ) 1968 printf("sbicmsgin waiting: csr %02x asr %02x\n", csr, asr); 1969 } while( csr == 0xff ); 1970 #endif 1971 #ifdef DEBUG 1972 if(reselect_debug>1) 1973 printf("sbicmsgin: got %02x csr %02x asr %02x\n", 1974 *tmpaddr, csr, asr); 1975 #endif 1976 #if do_parity_check 1977 if( asr & SBIC_ASR_PE ) { 1978 printf ("Parity error"); 1979 /* This code simply does not work. */ 1980 WAIT_CIP(regs); 1981 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 1982 WAIT_CIP(regs); 1983 GET_SBIC_asr(regs, asr); 1984 WAIT_CIP(regs); 1985 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 1986 WAIT_CIP(regs); 1987 if( !(asr & SBIC_ASR_LCI) ) 1988 /* Target wants to send garbled msg*/ 1989 continue; 1990 printf("--fixing\n"); 1991 /* loop until a msgout phase occurs on target */ 1992 while(csr & 0x07 != MESG_OUT_PHASE) { 1993 while( asr & SBIC_ASR_BSY && 1994 !(asr & SBIC_ASR_DBR|SBIC_ASR_INT) ) 1995 GET_SBIC_asr(regs, asr); 1996 if( asr & SBIC_ASR_DBR ) 1997 panic("msgin: jammed again!"); 1998 GET_SBIC_csr(regs, csr); 1999 CSR_TRACE('e',csr,asr,dev->target); 2000 if( csr & 0x07 != MESG_OUT_PHASE ) { 2001 sbicnextstate(dev, csr, asr); 2002 sbic_save_ptrs(dev, regs, 2003 dev->target, 2004 dev->lun); 2005 } 2006 } 2007 /* Should be msg out by now */ 2008 SEND_BYTE(regs, MSG_PARITY_ERROR); 2009 } 2010 else 2011 #endif 2012 tmpaddr++; 2013 2014 if(recvlen) { 2015 /* Clear ACK */ 2016 WAIT_CIP(regs); 2017 GET_SBIC_asr(regs, asr); 2018 GET_SBIC_csr(regs, csr); 2019 CSR_TRACE('X',csr,asr,dev->target); 2020 QPRINTF(("sbicmsgin pre byte CLR_ACK (csr,asr)=(%02x,%02x)\n", 2021 csr, asr)); 2022 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2023 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2024 } 2025 2026 }; 2027 2028 if(dev->sc_msg[0] == 0xff) { 2029 printf("sbicmsgin: sbic swallowed our message\n"); 2030 break; 2031 } 2032 #ifdef DEBUG 2033 if (sync_debug) 2034 printf("msgin done csr 0x%x asr 0x%x msg 0x%x\n", 2035 csr, asr, dev->sc_msg[0]); 2036 #endif 2037 /* 2038 * test whether this is a reply to our sync 2039 * request 2040 */ 2041 if (MSG_ISIDENTIFY(dev->sc_msg[0])) { 2042 QPRINTF(("IFFY")); 2043 #if 0 2044 /* There is an implied load-ptrs here */ 2045 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 2046 #endif 2047 /* Got IFFY msg -- ack it */ 2048 } else if (dev->sc_msg[0] == MSG_REJECT 2049 && dev->sc_sync[dev->target].state == SYNC_SENT) { 2050 QPRINTF(("REJECT of SYN")); 2051 #ifdef DEBUG 2052 if (sync_debug) 2053 printf("target %d rejected sync, going async\n", 2054 dev->target); 2055 #endif 2056 dev->sc_sync[dev->target].period = sbic_min_period; 2057 dev->sc_sync[dev->target].offset = 0; 2058 dev->sc_sync[dev->target].state = SYNC_DONE; 2059 SET_SBIC_syn(regs, 2060 SBIC_SYN(dev->sc_sync[dev->target].offset, 2061 dev->sc_sync[dev->target].period)); 2062 } else if ((dev->sc_msg[0] == MSG_REJECT)) { 2063 QPRINTF(("REJECT")); 2064 /* 2065 * we'll never REJECt a REJECT message.. 2066 */ 2067 } else if ((dev->sc_msg[0] == MSG_SAVE_DATA_PTR)) { 2068 QPRINTF(("MSG_SAVE_DATA_PTR")); 2069 /* 2070 * don't reject this either. 2071 */ 2072 } else if ((dev->sc_msg[0] == MSG_DISCONNECT)) { 2073 QPRINTF(("DISCONNECT")); 2074 #ifdef DEBUG 2075 if( reselect_debug>1 && dev->sc_msg[0] == MSG_DISCONNECT ) 2076 printf("sbicmsgin: got disconnect msg %s\n", 2077 (dev->sc_flags & SBICF_ICMD)?"rejecting":""); 2078 #endif 2079 if( dev->sc_flags & SBICF_ICMD ) { 2080 /* We're in immediate mode. Prevent disconnects. */ 2081 /* prepare to reject the message, NACK */ 2082 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 2083 WAIT_CIP(regs); 2084 } 2085 } else if (dev->sc_msg[0] == MSG_CMD_COMPLETE ) { 2086 QPRINTF(("CMD_COMPLETE")); 2087 /* !! KLUDGE ALERT !! quite a few drives don't seem to 2088 * really like the current way of sending the 2089 * sync-handshake together with the ident-message, and 2090 * they react by sending command-complete and 2091 * disconnecting right after returning the valid sync 2092 * handshake. So, all I can do is reselect the drive, 2093 * and hope it won't disconnect again. I don't think 2094 * this is valid behavior, but I can't help fixing a 2095 * problem that apparently exists. 2096 * 2097 * Note: we should not get here on `normal' command 2098 * completion, as that condition is handled by the 2099 * high-level sel&xfer resume command used to walk 2100 * thru status/cc-phase. 2101 */ 2102 2103 #ifdef DEBUG 2104 if (sync_debug) 2105 printf ("GOT MSG %d! target %d acting weird.." 2106 " waiting for disconnect...\n", 2107 dev->sc_msg[0], dev->target); 2108 #endif 2109 /* Check to see if sbic is handling this */ 2110 GET_SBIC_asr(regs, asr); 2111 if(asr & SBIC_ASR_BSY) 2112 return SBIC_STATE_RUNNING; 2113 2114 /* Let's try this: Assume it works and set status to 00 */ 2115 dev->sc_stat[0] = 0; 2116 } else if (dev->sc_msg[0] == MSG_EXT_MESSAGE 2117 && tmpaddr == &dev->sc_msg[1]) { 2118 QPRINTF(("ExtMSG\n")); 2119 /* Read in whole extended message */ 2120 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2121 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2122 GET_SBIC_asr(regs, asr); 2123 GET_SBIC_csr(regs, csr); 2124 QPRINTF(("CLR ACK asr %02x, csr %02x\n", asr, csr)); 2125 RECV_BYTE(regs, *tmpaddr); 2126 CSR_TRACE('x',csr,asr,*tmpaddr); 2127 /* Wait for command completion IRQ */ 2128 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2129 recvlen = *tmpaddr++; 2130 QPRINTF(("Recving ext msg, asr %02x csr %02x len %02x\n", 2131 asr, csr, recvlen)); 2132 } else if (dev->sc_msg[0] == MSG_EXT_MESSAGE && dev->sc_msg[1] == 3 2133 && dev->sc_msg[2] == MSG_SYNC_REQ) { 2134 QPRINTF(("SYN")); 2135 dev->sc_sync[dev->target].period = 2136 sbicfromscsiperiod(dev, 2137 regs, dev->sc_msg[3]); 2138 dev->sc_sync[dev->target].offset = dev->sc_msg[4]; 2139 dev->sc_sync[dev->target].state = SYNC_DONE; 2140 SET_SBIC_syn(regs, 2141 SBIC_SYN(dev->sc_sync[dev->target].offset, 2142 dev->sc_sync[dev->target].period)); 2143 printf("%s: target %d now synchronous," 2144 " period=%dns, offset=%d.\n", 2145 device_xname(dev->sc_dev), dev->target, 2146 dev->sc_msg[3] * 4, dev->sc_msg[4]); 2147 } else { 2148 #ifdef DEBUG 2149 if (sbic_debug || sync_debug) 2150 printf ("sbicmsgin: Rejecting message 0x%02x\n", 2151 dev->sc_msg[0]); 2152 #endif 2153 /* prepare to reject the message, NACK */ 2154 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 2155 WAIT_CIP(regs); 2156 } 2157 /* Clear ACK */ 2158 WAIT_CIP(regs); 2159 GET_SBIC_asr(regs, asr); 2160 GET_SBIC_csr(regs, csr); 2161 CSR_TRACE('X',csr,asr,dev->target); 2162 QPRINTF(("sbicmsgin pre CLR_ACK (csr,asr)=(%02x,%02x)%d\n", 2163 csr, asr, recvlen)); 2164 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2165 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2166 } 2167 #if 0 2168 while((csr == SBIC_CSR_MSGIN_W_ACK) 2169 || (SBIC_PHASE(csr) == MESG_IN_PHASE)); 2170 #else 2171 while (recvlen>0); 2172 #endif 2173 2174 QPRINTF(("sbicmsgin finished: csr %02x, asr %02x\n",csr, asr)); 2175 2176 /* Should still have one CSR to read */ 2177 return SBIC_STATE_RUNNING; 2178 } 2179 2180 2181 /* 2182 * sbicnextstate() 2183 * return: 2184 * 0 == done 2185 * 1 == working 2186 * 2 == disconnected 2187 * -1 == error 2188 */ 2189 int 2190 sbicnextstate(struct sbic_softc *dev, u_char csr, u_char asr) 2191 { 2192 sbic_regmap_t regs; 2193 struct sbic_acb *acb; 2194 int i, newtarget, newlun, wait; 2195 #if 0 2196 unsigned tcnt; 2197 #endif 2198 2199 i = 0; 2200 SBIC_TRACE(dev); 2201 regs = dev->sc_sbic; 2202 acb = dev->sc_nexus; 2203 2204 QPRINTF(("next[%02x,%02x]",asr,csr)); 2205 2206 switch (csr) { 2207 case SBIC_CSR_XFERRED|CMD_PHASE: 2208 case SBIC_CSR_MIS|CMD_PHASE: 2209 case SBIC_CSR_MIS_1|CMD_PHASE: 2210 case SBIC_CSR_MIS_2|CMD_PHASE: 2211 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2212 if (sbicxfstart(regs, acb->clen, CMD_PHASE, sbic_cmd_wait)) 2213 if (sbicxfout(regs, acb->clen, 2214 &acb->cmd, CMD_PHASE)) 2215 goto abort; 2216 break; 2217 2218 case SBIC_CSR_XFERRED|STATUS_PHASE: 2219 case SBIC_CSR_MIS|STATUS_PHASE: 2220 case SBIC_CSR_MIS_1|STATUS_PHASE: 2221 case SBIC_CSR_MIS_2|STATUS_PHASE: 2222 /* 2223 * this should be the normal i/o completion case. 2224 * get the status & cmd complete msg then let the 2225 * device driver look at what happened. 2226 */ 2227 sbicxfdone(dev,regs,dev->target); 2228 /* 2229 * check for overlapping cache line, flush if so 2230 */ 2231 #if defined(M68040) || defined(M68060) 2232 if (dev->sc_flags & SBICF_DCFLUSH) { 2233 #if 0 2234 printf("sbic: 68040/68060 DMA cache flush needs" 2235 "fixing? %x:%x\n", 2236 dev->sc_xs->data, dev->sc_xs->datalen); 2237 #endif 2238 } 2239 #endif 2240 #ifdef DEBUG 2241 if( data_pointer_debug > 1 ) 2242 printf("next dmastop: %d(%p:%lx)\n", 2243 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2244 dev->sc_dmatimo = 0; 2245 #endif 2246 dev->sc_dmastop(dev); /* was dmafree */ 2247 if (acb->flags & ACB_BBUF) { 2248 if ((u_char *)kvtop(acb->sc_dmausrbuf) != acb->sc_usrbufpa) 2249 printf("%s: WARNING - buffer mapping changed %p->%x\n", 2250 device_xname(dev->sc_dev), acb->sc_usrbufpa, 2251 (unsigned)kvtop(acb->sc_dmausrbuf)); 2252 #ifdef DEBUG 2253 if(data_pointer_debug) 2254 printf("sbicgo:copying %lx bytes from target %d bounce %x\n", 2255 acb->sc_dmausrlen, 2256 dev->target, 2257 (unsigned)kvtop(dev->sc_tinfo[dev->target].bounce)); 2258 #endif 2259 bcopy(dev->sc_tinfo[dev->target].bounce, 2260 acb->sc_dmausrbuf, 2261 acb->sc_dmausrlen); 2262 } 2263 dev->sc_flags &= ~(SBICF_INDMA | SBICF_DCFLUSH); 2264 sbic_scsidone(acb, dev->sc_stat[0]); 2265 SBIC_TRACE(dev); 2266 return SBIC_STATE_DONE; 2267 2268 case SBIC_CSR_XFERRED|DATA_OUT_PHASE: 2269 case SBIC_CSR_XFERRED|DATA_IN_PHASE: 2270 case SBIC_CSR_MIS|DATA_OUT_PHASE: 2271 case SBIC_CSR_MIS|DATA_IN_PHASE: 2272 case SBIC_CSR_MIS_1|DATA_OUT_PHASE: 2273 case SBIC_CSR_MIS_1|DATA_IN_PHASE: 2274 case SBIC_CSR_MIS_2|DATA_OUT_PHASE: 2275 case SBIC_CSR_MIS_2|DATA_IN_PHASE: 2276 if( dev->sc_xs->xs_control & XS_CTL_POLL || dev->sc_flags & SBICF_ICMD 2277 || acb->sc_dmacmd == 0 ) { 2278 /* Do PIO */ 2279 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 2280 if (acb->sc_kv.dc_count <= 0) { 2281 printf("sbicnextstate:xfer count %d asr%x csr%x\n", 2282 acb->sc_kv.dc_count, asr, csr); 2283 goto abort; 2284 } 2285 wait = sbic_data_wait; 2286 if( sbicxfstart(regs, 2287 acb->sc_kv.dc_count, 2288 SBIC_PHASE(csr), wait)) { 2289 if( SBIC_PHASE(csr) == DATA_IN_PHASE ) 2290 /* data in? */ 2291 i=sbicxfin(regs, 2292 acb->sc_kv.dc_count, 2293 acb->sc_kv.dc_addr); 2294 else 2295 i=sbicxfout(regs, 2296 acb->sc_kv.dc_count, 2297 acb->sc_kv.dc_addr, 2298 SBIC_PHASE(csr)); 2299 } 2300 acb->sc_kv.dc_addr += 2301 (acb->sc_kv.dc_count - i); 2302 acb->sc_kv.dc_count = i; 2303 } else { 2304 if (acb->sc_kv.dc_count <= 0) { 2305 printf("sbicnextstate:xfer count %d asr%x csr%x\n", 2306 acb->sc_kv.dc_count, asr, csr); 2307 goto abort; 2308 } 2309 /* 2310 * do scatter-gather DMA 2311 * hacking the controller chip, ouch.. 2312 */ 2313 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI | 2314 SBIC_MACHINE_DMA_MODE); 2315 /* 2316 * set next DMA addr and dec count 2317 */ 2318 #if 0 2319 SBIC_TC_GET(regs, tcnt); 2320 dev->sc_cur->dc_count -= ((dev->sc_tcnt - tcnt) >> 1); 2321 dev->sc_cur->dc_addr += (dev->sc_tcnt - tcnt); 2322 dev->sc_tcnt = acb->sc_tcnt = tcnt; 2323 #else 2324 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2325 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 2326 #endif 2327 #ifdef DEBUG 2328 if( data_pointer_debug > 1 ) 2329 printf("next dmanext: %d(%p:%lx)\n", 2330 dev->target,dev->sc_cur->dc_addr, 2331 dev->sc_tcnt); 2332 dev->sc_dmatimo = 1; 2333 #endif 2334 dev->sc_tcnt = dev->sc_dmanext(dev); 2335 SBIC_TC_PUT(regs, (unsigned)dev->sc_tcnt); 2336 SET_SBIC_cmd(regs, SBIC_CMD_XFER_INFO); 2337 dev->sc_flags |= SBICF_INDMA; 2338 } 2339 break; 2340 2341 case SBIC_CSR_XFERRED|MESG_IN_PHASE: 2342 case SBIC_CSR_MIS|MESG_IN_PHASE: 2343 case SBIC_CSR_MIS_1|MESG_IN_PHASE: 2344 case SBIC_CSR_MIS_2|MESG_IN_PHASE: 2345 SBIC_TRACE(dev); 2346 return sbicmsgin(dev); 2347 2348 case SBIC_CSR_MSGIN_W_ACK: 2349 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); /* Dunno what I'm ACKing */ 2350 printf("Acking unknown msgin CSR:%02x",csr); 2351 break; 2352 2353 case SBIC_CSR_XFERRED|MESG_OUT_PHASE: 2354 case SBIC_CSR_MIS|MESG_OUT_PHASE: 2355 case SBIC_CSR_MIS_1|MESG_OUT_PHASE: 2356 case SBIC_CSR_MIS_2|MESG_OUT_PHASE: 2357 #ifdef DEBUG 2358 if (sync_debug) 2359 printf ("sending REJECT msg to last msg.\n"); 2360 #endif 2361 2362 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2363 /* 2364 * should only get here on reject, 2365 * since it's always US that 2366 * initiate a sync transfer 2367 */ 2368 SEND_BYTE(regs, MSG_REJECT); 2369 WAIT_CIP(regs); 2370 if( asr & (SBIC_ASR_BSY|SBIC_ASR_LCI|SBIC_ASR_CIP) ) 2371 printf("next: REJECT sent asr %02x\n", asr); 2372 SBIC_TRACE(dev); 2373 return SBIC_STATE_RUNNING; 2374 2375 case SBIC_CSR_DISC: 2376 case SBIC_CSR_DISC_1: 2377 dev->sc_flags &= ~(SBICF_INDMA|SBICF_SELECTED); 2378 2379 /* Try to schedule another target */ 2380 #ifdef DEBUG 2381 if(reselect_debug>1) 2382 printf("sbicnext target %d disconnected\n", dev->target); 2383 #endif 2384 TAILQ_INSERT_HEAD(&dev->nexus_list, acb, chain); 2385 ++dev->sc_tinfo[dev->target].dconns; 2386 dev->sc_nexus = NULL; 2387 dev->sc_xs = NULL; 2388 2389 if( acb->xs->xs_control & XS_CTL_POLL 2390 || (dev->sc_flags & SBICF_ICMD) 2391 || !sbic_parallel_operations ) { 2392 SBIC_TRACE(dev); 2393 return SBIC_STATE_DISCONNECT; 2394 } 2395 sbic_sched(dev); 2396 SBIC_TRACE(dev); 2397 return SBIC_STATE_DISCONNECT; 2398 2399 case SBIC_CSR_RSLT_NI: 2400 case SBIC_CSR_RSLT_IFY: 2401 GET_SBIC_rselid(regs, newtarget); 2402 /* check SBIC_RID_SIV? */ 2403 newtarget &= SBIC_RID_MASK; 2404 if (csr == SBIC_CSR_RSLT_IFY) { 2405 /* Read IFY msg to avoid lockup */ 2406 GET_SBIC_data(regs, newlun); 2407 WAIT_CIP(regs); 2408 newlun &= SBIC_TLUN_MASK; 2409 CSR_TRACE('r',csr,asr,newtarget); 2410 } else { 2411 /* Need to get IFY message */ 2412 for (newlun = 256; newlun; --newlun) { 2413 GET_SBIC_asr(regs, asr); 2414 if (asr & SBIC_ASR_INT) 2415 break; 2416 delay(1); 2417 } 2418 newlun = 0; /* XXXX */ 2419 if ((asr & SBIC_ASR_INT) == 0) { 2420 #ifdef DEBUG 2421 if (reselect_debug) 2422 printf("RSLT_NI - no IFFY message? asr %x\n", asr); 2423 #endif 2424 } else { 2425 GET_SBIC_csr(regs,csr); 2426 CSR_TRACE('n',csr,asr,newtarget); 2427 if (csr == (SBIC_CSR_MIS | MESG_IN_PHASE) || 2428 csr == (SBIC_CSR_MIS_1 | MESG_IN_PHASE) || 2429 csr == (SBIC_CSR_MIS_2 | MESG_IN_PHASE)) { 2430 sbicmsgin(dev); 2431 newlun = dev->sc_msg[0] & 7; 2432 } else { 2433 printf("RSLT_NI - not MESG_IN_PHASE %x\n", 2434 csr); 2435 } 2436 } 2437 } 2438 #ifdef DEBUG 2439 if(reselect_debug>1 || (reselect_debug && csr==SBIC_CSR_RSLT_NI)) 2440 printf("sbicnext: reselect %s from targ %d lun %d\n", 2441 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY", 2442 newtarget, newlun); 2443 #endif 2444 if (dev->sc_nexus) { 2445 #ifdef DEBUG 2446 if (reselect_debug > 1) 2447 printf("%s: reselect %s with active command\n", 2448 device_xname(dev->sc_dev), 2449 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY"); 2450 #ifdef DDB 2451 /* Debugger();*/ 2452 #endif 2453 #endif 2454 TAILQ_INSERT_HEAD(&dev->ready_list, dev->sc_nexus, chain); 2455 dev->sc_tinfo[dev->target].lubusy &= ~(1 << dev->lun); 2456 dev->sc_nexus = NULL; 2457 dev->sc_xs = NULL; 2458 } 2459 /* Reload sync values for this target */ 2460 if (dev->sc_sync[newtarget].state == SYNC_DONE) 2461 SET_SBIC_syn(regs, SBIC_SYN (dev->sc_sync[newtarget].offset, 2462 dev->sc_sync[newtarget].period)); 2463 else 2464 SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period)); 2465 for (acb = dev->nexus_list.tqh_first; acb; 2466 acb = acb->chain.tqe_next) { 2467 if (acb->xs->xs_periph->periph_target != newtarget || 2468 acb->xs->xs_periph->periph_lun != newlun) 2469 continue; 2470 TAILQ_REMOVE(&dev->nexus_list, acb, chain); 2471 dev->sc_nexus = acb; 2472 dev->sc_xs = acb->xs; 2473 dev->sc_flags |= SBICF_SELECTED; 2474 dev->target = newtarget; 2475 dev->lun = newlun; 2476 break; 2477 } 2478 if (acb == NULL) { 2479 printf("%s: reselect %s targ %d not in nexus_list %p\n", 2480 device_xname(dev->sc_dev), 2481 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY", newtarget, 2482 &dev->nexus_list.tqh_first); 2483 panic("bad reselect in sbic"); 2484 } 2485 if (csr == SBIC_CSR_RSLT_IFY) 2486 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2487 break; 2488 2489 default: 2490 abort: 2491 /* 2492 * Something unexpected happened -- deal with it. 2493 */ 2494 printf("sbicnextstate: aborting csr %02x asr %02x\n", csr, asr); 2495 #ifdef DDB 2496 Debugger(); 2497 #endif 2498 #ifdef DEBUG 2499 if( data_pointer_debug > 1 ) 2500 printf("next dmastop: %d(%p:%lx)\n", 2501 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2502 dev->sc_dmatimo = 0; 2503 #endif 2504 dev->sc_dmastop(dev); 2505 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 2506 sbicerror(dev, regs, csr); 2507 sbicabort(dev, regs, "next"); 2508 if (dev->sc_flags & SBICF_INDMA) { 2509 /* 2510 * check for overlapping cache line, flush if so 2511 */ 2512 #if defined(M68040) || defined(M68060) 2513 if (dev->sc_flags & SBICF_DCFLUSH) { 2514 #if 0 2515 printf("sbic: 68040/060 DMA cache flush needs" 2516 "fixing? %x:%x\n", 2517 dev->sc_xs->data, dev->sc_xs->datalen); 2518 #endif 2519 } 2520 #endif 2521 dev->sc_flags &= 2522 ~(SBICF_INDMA | SBICF_DCFLUSH); 2523 #ifdef DEBUG 2524 if( data_pointer_debug > 1 ) 2525 printf("next dmastop: %d(%p:%lx)\n", 2526 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2527 dev->sc_dmatimo = 0; 2528 #endif 2529 dev->sc_dmastop(dev); 2530 sbic_scsidone(acb, -1); 2531 } 2532 SBIC_TRACE(dev); 2533 return SBIC_STATE_ERROR; 2534 } 2535 2536 SBIC_TRACE(dev); 2537 return(SBIC_STATE_RUNNING); 2538 } 2539 2540 2541 /* 2542 * Check if DMA can not be used with specified buffer 2543 */ 2544 2545 int 2546 sbiccheckdmap(void *bp, u_long len, u_long mask) 2547 { 2548 u_char *buffer; 2549 u_long phy_buf; 2550 u_long phy_len; 2551 2552 buffer = bp; 2553 2554 if (len == 0) 2555 return(0); 2556 2557 while (len) { 2558 phy_buf = kvtop(buffer); 2559 if (len < (phy_len = PAGE_SIZE - ((int) buffer & PGOFSET))) 2560 phy_len = len; 2561 if (phy_buf & mask) 2562 return(1); 2563 buffer += phy_len; 2564 len -= phy_len; 2565 } 2566 return(0); 2567 } 2568 2569 int 2570 sbictoscsiperiod(struct sbic_softc *dev, sbic_regmap_t regs, int a) 2571 { 2572 unsigned int fs; 2573 2574 /* 2575 * cycle = DIV / (2*CLK) 2576 * DIV = FS+2 2577 * best we can do is 200ns at 20 MHz, 2 cycles 2578 */ 2579 2580 GET_SBIC_myid(regs,fs); 2581 fs = (fs >>6) + 2; /* DIV */ 2582 fs = (fs * 10000) / (dev->sc_clkfreq<<1); /* Cycle, in ns */ 2583 if (a < 2) a = 8; /* map to Cycles */ 2584 return ((fs*a)>>2); /* in 4 ns units */ 2585 } 2586 2587 int 2588 sbicfromscsiperiod(struct sbic_softc *dev, sbic_regmap_t regs, int p) 2589 { 2590 register unsigned int fs, ret; 2591 2592 /* Just the inverse of the above */ 2593 2594 GET_SBIC_myid(regs,fs); 2595 fs = (fs >>6) + 2; /* DIV */ 2596 fs = (fs * 10000) / (dev->sc_clkfreq<<1); /* Cycle, in ns */ 2597 2598 ret = p << 2; /* in ns units */ 2599 ret = ret / fs; /* in Cycles */ 2600 if (ret < sbic_min_period) 2601 return(sbic_min_period); 2602 2603 /* verify rounding */ 2604 if (sbictoscsiperiod(dev, regs, ret) < p) 2605 ret++; 2606 return (ret >= 8) ? 0 : ret; 2607 } 2608 2609 #ifdef DEBUG 2610 2611 void 2612 sbicdumpstate(void) 2613 { 2614 u_char csr, asr; 2615 2616 GET_SBIC_asr(debug_sbic_regs,asr); 2617 GET_SBIC_csr(debug_sbic_regs,csr); 2618 printf("%s: asr:csr(%02x:%02x)->(%02x:%02x)\n", 2619 (routine==1)?"sbicgo": 2620 (routine==2)?"sbicintr": 2621 (routine==3)?"sbicicmd": 2622 (routine==4)?"sbicnext":"unknown", 2623 debug_asr, debug_csr, asr, csr); 2624 2625 } 2626 2627 void 2628 sbictimeout(struct sbic_softc *dev) 2629 { 2630 int s, asr; 2631 2632 s = splbio(); 2633 if (dev->sc_dmatimo) { 2634 if (dev->sc_dmatimo > 1) { 2635 printf("%s: DMA timeout #%d\n", 2636 device_xname(dev->sc_dev), dev->sc_dmatimo - 1); 2637 GET_SBIC_asr(dev->sc_sbic, asr); 2638 if( asr & SBIC_ASR_INT ) { 2639 /* We need to service a missed IRQ */ 2640 printf("Servicing a missed int:(%02x,%02x)->(%02x,?)\n", 2641 debug_asr, debug_csr, asr); 2642 sbicintr(dev); 2643 } 2644 sbicdumpstate(); 2645 } 2646 dev->sc_dmatimo++; 2647 } 2648 splx(s); 2649 callout_reset(&dev->sc_timo_ch, 30 * hz, 2650 (void *)sbictimeout, dev); 2651 } 2652 2653 void 2654 sbic_dump_acb(struct sbic_acb *acb) 2655 { 2656 u_char *b = (u_char *) &acb->cmd; 2657 int i; 2658 2659 printf("acb@%p ", acb); 2660 if (acb->xs == NULL) { 2661 printf("<unused>\n"); 2662 return; 2663 } 2664 printf("(%d:%d) flags %2x clen %2d cmd ", 2665 acb->xs->xs_periph->periph_target, 2666 acb->xs->xs_periph->periph_lun, acb->flags, acb->clen); 2667 for (i = acb->clen; i; --i) 2668 printf(" %02x", *b++); 2669 printf("\n"); 2670 printf(" xs: %8p data %8p:%04x ", acb->xs, acb->xs->data, 2671 acb->xs->datalen); 2672 printf("va %8p:%04x ", acb->sc_kv.dc_addr, acb->sc_kv.dc_count); 2673 printf("pa %8p:%04x tcnt %lx\n", acb->sc_pa.dc_addr, acb->sc_pa.dc_count, 2674 acb->sc_tcnt); 2675 } 2676 2677 void 2678 sbic_dump(struct sbic_softc *dev) 2679 { 2680 sbic_regmap_t regs; 2681 u_char csr, asr; 2682 struct sbic_acb *acb; 2683 int s; 2684 int i; 2685 2686 s = splbio(); 2687 regs = dev->sc_sbic; 2688 #if CSR_TRACE_SIZE 2689 printf("csr trace: "); 2690 i = csr_traceptr; 2691 do { 2692 printf("%c%02x%02x%02x ", csr_trace[i].whr, 2693 csr_trace[i].csr, csr_trace[i].asr, csr_trace[i].xtn); 2694 switch(csr_trace[i].whr) { 2695 case 'g': 2696 printf("go "); break; 2697 case 's': 2698 printf("select "); break; 2699 case 'y': 2700 printf("select+ "); break; 2701 case 'i': 2702 printf("intr "); break; 2703 case 'f': 2704 printf("finish "); break; 2705 case '>': 2706 printf("out "); break; 2707 case '<': 2708 printf("in "); break; 2709 case 'm': 2710 printf("msgin "); break; 2711 case 'x': 2712 printf("msginx "); break; 2713 case 'X': 2714 printf("msginX "); break; 2715 case 'r': 2716 printf("reselect "); break; 2717 case 'I': 2718 printf("icmd "); break; 2719 case 'a': 2720 printf("abort "); break; 2721 default: 2722 printf("? "); 2723 } 2724 switch(csr_trace[i].csr) { 2725 case 0x11: 2726 printf("INITIATOR"); break; 2727 case 0x16: 2728 printf("S_XFERRED"); break; 2729 case 0x20: 2730 printf("MSGIN_ACK"); break; 2731 case 0x41: 2732 printf("DISC"); break; 2733 case 0x42: 2734 printf("SEL_TIMEO"); break; 2735 case 0x80: 2736 printf("RSLT_NI"); break; 2737 case 0x81: 2738 printf("RSLT_IFY"); break; 2739 case 0x85: 2740 printf("DISC_1"); break; 2741 case 0x18: case 0x19: case 0x1a: 2742 case 0x1b: case 0x1e: case 0x1f: 2743 case 0x28: case 0x29: case 0x2a: 2744 case 0x2b: case 0x2e: case 0x2f: 2745 case 0x48: case 0x49: case 0x4a: 2746 case 0x4b: case 0x4e: case 0x4f: 2747 case 0x88: case 0x89: case 0x8a: 2748 case 0x8b: case 0x8e: case 0x8f: 2749 switch(csr_trace[i].csr & 0xf0) { 2750 case 0x10: 2751 printf("DONE_"); break; 2752 case 0x20: 2753 printf("STOP_"); break; 2754 case 0x40: 2755 printf("ERR_"); break; 2756 case 0x80: 2757 printf("REQ_"); break; 2758 } 2759 switch(csr_trace[i].csr & 7) { 2760 case 0: 2761 printf("DATA_OUT"); break; 2762 case 1: 2763 printf("DATA_IN"); break; 2764 case 2: 2765 printf("CMD"); break; 2766 case 3: 2767 printf("STATUS"); break; 2768 case 6: 2769 printf("MSG_OUT"); break; 2770 case 7: 2771 printf("MSG_IN"); break; 2772 default: 2773 printf("invld phs"); 2774 } 2775 break; 2776 default: printf("****"); break; 2777 } 2778 if (csr_trace[i].asr & SBIC_ASR_INT) 2779 printf(" ASR_INT"); 2780 if (csr_trace[i].asr & SBIC_ASR_LCI) 2781 printf(" ASR_LCI"); 2782 if (csr_trace[i].asr & SBIC_ASR_BSY) 2783 printf(" ASR_BSY"); 2784 if (csr_trace[i].asr & SBIC_ASR_CIP) 2785 printf(" ASR_CIP"); 2786 printf("\n"); 2787 i = (i + 1) & (CSR_TRACE_SIZE - 1); 2788 } while (i != csr_traceptr); 2789 #endif 2790 GET_SBIC_asr(regs, asr); 2791 if ((asr & SBIC_ASR_INT) == 0) 2792 GET_SBIC_csr(regs, csr); 2793 else 2794 csr = 0; 2795 printf("%s@%p regs %p/%p asr %x csr %x\n", device_xname(dev->sc_dev), 2796 dev, regs.sbic_asr_p, regs.sbic_value_p, asr, csr); 2797 if ((acb = dev->free_list.tqh_first)) { 2798 printf("Free list:\n"); 2799 while (acb) { 2800 sbic_dump_acb(acb); 2801 acb = acb->chain.tqe_next; 2802 } 2803 } 2804 if ((acb = dev->ready_list.tqh_first)) { 2805 printf("Ready list:\n"); 2806 while (acb) { 2807 sbic_dump_acb(acb); 2808 acb = acb->chain.tqe_next; 2809 } 2810 } 2811 if ((acb = dev->nexus_list.tqh_first)) { 2812 printf("Nexus list:\n"); 2813 while (acb) { 2814 sbic_dump_acb(acb); 2815 acb = acb->chain.tqe_next; 2816 } 2817 } 2818 if (dev->sc_nexus) { 2819 printf("nexus:\n"); 2820 sbic_dump_acb(dev->sc_nexus); 2821 } 2822 printf("sc_xs %p targ %d lun %d flags %x tcnt %lx dmacmd %x mask %lx\n", 2823 dev->sc_xs, dev->target, dev->lun, dev->sc_flags, dev->sc_tcnt, 2824 dev->sc_dmacmd, dev->sc_dmamask); 2825 for (i = 0; i < 8; ++i) { 2826 if (dev->sc_tinfo[i].cmds > 2) { 2827 printf("tgt %d: cmds %d disc %d lubusy %x\n", 2828 i, dev->sc_tinfo[i].cmds, 2829 dev->sc_tinfo[i].dconns, 2830 dev->sc_tinfo[i].lubusy); 2831 } 2832 } 2833 splx(s); 2834 } 2835 2836 #endif 2837
Indexes created Sat Sep 27 14:09:57 GMT 2025