sbic.c revision 1.38
1 /* $NetBSD: sbic.c,v 1.38 2000/01/18 19:33:32 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 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 * @(#)scsi.c 7.5 (Berkeley) 5/4/91 40 */ 41 42 /* 43 * AMIGA AMD 33C93 scsi adaptor driver 44 */ 45 46 #include "opt_ddb.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/device.h> 51 #include <sys/kernel.h> /* For hz */ 52 #include <sys/disklabel.h> 53 #include <sys/dkstat.h> 54 #include <sys/buf.h> 55 #include <dev/scsipi/scsi_all.h> 56 #include <dev/scsipi/scsipi_all.h> 57 #include <dev/scsipi/scsiconf.h> 58 #include <vm/vm.h> 59 #include <vm/vm_kern.h> 60 #include <vm/vm_page.h> 61 #include <machine/pmap.h> 62 #include <machine/cpu.h> 63 #include <amiga/amiga/device.h> 64 #include <amiga/amiga/custom.h> 65 #include <amiga/amiga/isr.h> 66 #include <amiga/dev/dmavar.h> 67 #include <amiga/dev/sbicreg.h> 68 #include <amiga/dev/sbicvar.h> 69 70 /* These are for bounce buffers */ 71 #include <amiga/amiga/cc.h> 72 #include <amiga/dev/zbusvar.h> 73 74 #include <vm/pmap.h> 75 76 /* Since I can't find this in any other header files */ 77 #define SCSI_PHASE(reg) (reg&0x07) 78 79 /* 80 * SCSI delays 81 * In u-seconds, primarily for state changes on the SPC. 82 */ 83 #define SBIC_CMD_WAIT 50000 /* wait per step of 'immediate' cmds */ 84 #define SBIC_DATA_WAIT 50000 /* wait per data in/out step */ 85 #define SBIC_INIT_WAIT 50000 /* wait per step (both) during init */ 86 87 #define SBIC_WAIT(regs, until, timeo) sbicwait(regs, until, timeo, __LINE__) 88 89 int sbicicmd __P((struct sbic_softc *, int, int, void *, int, void *, int)); 90 int sbicgo __P((struct sbic_softc *, struct scsipi_xfer *)); 91 int sbicdmaok __P((struct sbic_softc *, struct scsipi_xfer *)); 92 int sbicwait __P((sbic_regmap_t, char, int , int)); 93 int sbiccheckdmap __P((void *, u_long, u_long)); 94 int sbicselectbus __P((struct sbic_softc *, sbic_regmap_t, u_char, u_char, u_char)); 95 int sbicxfstart __P((sbic_regmap_t, int, u_char, int)); 96 int sbicxfout __P((sbic_regmap_t regs, int, void *, int)); 97 int sbicfromscsiperiod __P((struct sbic_softc *, sbic_regmap_t, int)); 98 int sbictoscsiperiod __P((struct sbic_softc *, sbic_regmap_t, int)); 99 int sbicpoll __P((struct sbic_softc *)); 100 int sbicnextstate __P((struct sbic_softc *, u_char, u_char)); 101 int sbicmsgin __P((struct sbic_softc *)); 102 int sbicxfin __P((sbic_regmap_t regs, int, void *)); 103 int sbicabort __P((struct sbic_softc *, sbic_regmap_t, char *)); 104 void sbicxfdone __P((struct sbic_softc *, sbic_regmap_t, int)); 105 void sbicerror __P((struct sbic_softc *, sbic_regmap_t, u_char)); 106 void sbicstart __P((struct sbic_softc *)); 107 void sbicreset __P((struct sbic_softc *)); 108 void sbic_scsidone __P((struct sbic_acb *, int)); 109 void sbic_sched __P((struct sbic_softc *)); 110 void sbic_save_ptrs __P((struct sbic_softc *, sbic_regmap_t,int,int)); 111 void sbic_load_ptrs __P((struct sbic_softc *, sbic_regmap_t,int,int)); 112 #ifdef DEBUG 113 void sbicdumpstate __P((void)); 114 void sbic_dump_acb __P((struct sbic_acb *)); 115 #endif 116 117 /* 118 * Synch xfer parameters, and timing conversions 119 */ 120 int sbic_min_period = SBIC_SYN_MIN_PERIOD; /* in cycles = f(ICLK,FSn) */ 121 int sbic_max_offset = SBIC_SYN_MAX_OFFSET; /* pure number */ 122 123 int sbic_cmd_wait = SBIC_CMD_WAIT; 124 int sbic_data_wait = SBIC_DATA_WAIT; 125 int sbic_init_wait = SBIC_INIT_WAIT; 126 127 /* 128 * was broken before.. now if you want this you get it for all drives 129 * on sbic controllers. 130 */ 131 u_char sbic_inhibit_sync[8]; 132 int sbic_enable_reselect = 1; 133 int sbic_clock_override = 0; 134 int sbic_no_dma = 0; 135 int sbic_parallel_operations = 1; 136 137 #ifdef DEBUG 138 sbic_regmap_t debug_sbic_regs; 139 int sbicdma_ops = 0; /* total DMA operations */ 140 int sbicdma_bounces = 0; /* number operations using bounce buffer */ 141 int sbicdma_hits = 0; /* number of DMA chains that were contiguous */ 142 int sbicdma_misses = 0; /* number of DMA chains that were not contiguous */ 143 int sbicdma_saves = 0; 144 #define QPRINTF(a) if (sbic_debug > 1) printf a 145 int sbic_debug = 0; 146 int sync_debug = 0; 147 int sbic_dma_debug = 0; 148 int reselect_debug = 0; 149 int report_sense = 0; 150 int data_pointer_debug = 0; 151 u_char debug_asr, debug_csr, routine; 152 void sbictimeout __P((struct sbic_softc *dev)); 153 154 #define CSR_TRACE_SIZE 32 155 #if CSR_TRACE_SIZE 156 #define CSR_TRACE(w,c,a,x) do { \ 157 int s = splbio(); \ 158 csr_trace[csr_traceptr].whr = (w); csr_trace[csr_traceptr].csr = (c); \ 159 csr_trace[csr_traceptr].asr = (a); csr_trace[csr_traceptr].xtn = (x); \ 160 dma_cachectl((caddr_t)&csr_trace[csr_traceptr], sizeof(csr_trace[0])); \ 161 csr_traceptr = (csr_traceptr + 1) & (CSR_TRACE_SIZE - 1); \ 162 /* dma_cachectl((caddr_t)&csr_traceptr, sizeof(csr_traceptr));*/ \ 163 splx(s); \ 164 } while (0) 165 int csr_traceptr; 166 int csr_tracesize = CSR_TRACE_SIZE; 167 struct { 168 u_char whr; 169 u_char csr; 170 u_char asr; 171 u_char xtn; 172 } csr_trace[CSR_TRACE_SIZE]; 173 #else 174 #define CSR_TRACE(w,c,a,x) 175 #endif 176 177 #define SBIC_TRACE_SIZE 0 178 #if SBIC_TRACE_SIZE 179 #define SBIC_TRACE(dev) do { \ 180 int s = splbio(); \ 181 sbic_trace[sbic_traceptr].sp = &s; \ 182 sbic_trace[sbic_traceptr].line = __LINE__; \ 183 sbic_trace[sbic_traceptr].sr = s; \ 184 sbic_trace[sbic_traceptr].csr = csr_traceptr; \ 185 dma_cachectl(&sbic_trace[sbic_traceptr], sizeof(sbic_trace[0])); \ 186 sbic_traceptr = (sbic_traceptr + 1) & (SBIC_TRACE_SIZE - 1); \ 187 dma_cachectl(&sbic_traceptr, sizeof(sbic_traceptr)); \ 188 if (dev) dma_cachectl(dev, sizeof(*dev)); \ 189 splx(s); \ 190 } while (0) 191 int sbic_traceptr; 192 int sbic_tracesize = SBIC_TRACE_SIZE; 193 struct { 194 void *sp; 195 u_short line; 196 u_short sr; 197 int csr; 198 } sbic_trace[SBIC_TRACE_SIZE]; 199 #else 200 #define SBIC_TRACE(dev) 201 #endif 202 203 #else /* DEBUG */ 204 #define QPRINTF(a) 205 #define CSR_TRACE(w,c,a,x) 206 #define SBIC_TRACE(dev) 207 #endif /* DEBUG */ 208 209 /* 210 * default minphys routine for sbic based controllers 211 */ 212 void 213 sbic_minphys(bp) 214 struct buf *bp; 215 { 216 217 /* 218 * No max transfer at this level. 219 */ 220 minphys(bp); 221 } 222 223 /* 224 * Save DMA pointers. Take into account partial transfer. Shut down DMA. 225 */ 226 void 227 sbic_save_ptrs(dev, regs, target, lun) 228 struct sbic_softc *dev; 229 sbic_regmap_t regs; 230 int target, lun; 231 { 232 int count, asr, s; 233 struct sbic_acb* acb; 234 235 SBIC_TRACE(dev); 236 if( !dev->sc_cur ) return; 237 if( !(dev->sc_flags & SBICF_INDMA) ) return; /* DMA not active */ 238 239 s = splbio(); 240 241 acb = dev->sc_nexus; 242 count = -1; 243 do { 244 GET_SBIC_asr(regs, asr); 245 if( asr & SBIC_ASR_DBR ) { 246 printf("sbic_save_ptrs: asr %02x canceled!\n", asr); 247 splx(s); 248 SBIC_TRACE(dev); 249 return; 250 } 251 } while( asr & (SBIC_ASR_BSY|SBIC_ASR_CIP) ); 252 253 /* Save important state */ 254 /* must be done before dmastop */ 255 acb->sc_dmacmd = dev->sc_dmacmd; 256 SBIC_TC_GET(regs, count); 257 258 /* Shut down DMA ====CAREFUL==== */ 259 dev->sc_dmastop(dev); 260 dev->sc_flags &= ~SBICF_INDMA; 261 SBIC_TC_PUT(regs, 0); 262 263 #ifdef DEBUG 264 if(!count && sbic_debug) printf("%dcount0",target); 265 if(data_pointer_debug == -1) 266 printf("SBIC saving target %d data pointers from (%p,%x)%xASR:%02x", 267 target, dev->sc_cur->dc_addr, dev->sc_cur->dc_count, 268 acb->sc_dmacmd, asr); 269 #endif 270 271 /* Fixup partial xfers */ 272 acb->sc_kv.dc_addr += (dev->sc_tcnt - count); 273 acb->sc_kv.dc_count -= (dev->sc_tcnt - count); 274 acb->sc_pa.dc_addr += (dev->sc_tcnt - count); 275 acb->sc_pa.dc_count -= ((dev->sc_tcnt - count)>>1); 276 277 acb->sc_tcnt = dev->sc_tcnt = count; 278 #ifdef DEBUG 279 if(data_pointer_debug) 280 printf(" at (%p,%x):%x\n", 281 dev->sc_cur->dc_addr, dev->sc_cur->dc_count,count); 282 sbicdma_saves++; 283 #endif 284 splx(s); 285 SBIC_TRACE(dev); 286 } 287 288 289 /* 290 * DOES NOT RESTART DMA!!! 291 */ 292 void sbic_load_ptrs(dev, regs, target, lun) 293 struct sbic_softc *dev; 294 sbic_regmap_t regs; 295 int target, lun; 296 { 297 int s, count; 298 char* vaddr, * paddr; 299 struct sbic_acb *acb; 300 301 SBIC_TRACE(dev); 302 acb = dev->sc_nexus; 303 if( !acb->sc_kv.dc_count ) { 304 /* No data to xfer */ 305 SBIC_TRACE(dev); 306 return; 307 } 308 309 s = splbio(); 310 311 dev->sc_last = dev->sc_cur = &acb->sc_pa; 312 dev->sc_tcnt = acb->sc_tcnt; 313 dev->sc_dmacmd = acb->sc_dmacmd; 314 315 #ifdef DEBUG 316 sbicdma_ops++; 317 #endif 318 if( !dev->sc_tcnt ) { 319 /* sc_tcnt == 0 implies end of segment */ 320 321 /* do kvm to pa mappings */ 322 paddr = acb->sc_pa.dc_addr = 323 (char *) kvtop(acb->sc_kv.dc_addr); 324 325 vaddr = acb->sc_kv.dc_addr; 326 count = acb->sc_kv.dc_count; 327 for(count = (NBPG - ((int)vaddr & PGOFSET)); 328 count < acb->sc_kv.dc_count 329 && (char*)kvtop(vaddr + count + 4) == paddr + count + 4; 330 count += NBPG); 331 /* If it's all contiguous... */ 332 if(count > acb->sc_kv.dc_count ) { 333 count = acb->sc_kv.dc_count; 334 #ifdef DEBUG 335 sbicdma_hits++; 336 #endif 337 } else { 338 #ifdef DEBUG 339 sbicdma_misses++; 340 #endif 341 } 342 acb->sc_tcnt = count; 343 acb->sc_pa.dc_count = count >> 1; 344 345 #ifdef DEBUG 346 if(data_pointer_debug) 347 printf("DMA recalc:kv(%p,%x)pa(%p,%lx)\n", 348 acb->sc_kv.dc_addr, 349 acb->sc_kv.dc_count, 350 acb->sc_pa.dc_addr, 351 acb->sc_tcnt); 352 #endif 353 } 354 splx(s); 355 #ifdef DEBUG 356 if(data_pointer_debug) 357 printf("SBIC restoring target %d data pointers at (%p,%x)%x\n", 358 target, dev->sc_cur->dc_addr, dev->sc_cur->dc_count, 359 dev->sc_dmacmd); 360 #endif 361 SBIC_TRACE(dev); 362 } 363 364 /* 365 * used by specific sbic controller 366 * 367 * it appears that the higher level code does nothing with LUN's 368 * so I will too. I could plug it in, however so could they 369 * in scsi_scsipi_cmd(). 370 */ 371 int 372 sbic_scsicmd(xs) 373 struct scsipi_xfer *xs; 374 { 375 struct sbic_acb *acb; 376 struct sbic_softc *dev; 377 struct scsipi_link *slp; 378 int flags, s, stat; 379 380 slp = xs->sc_link; 381 dev = slp->adapter_softc; 382 SBIC_TRACE(dev); 383 flags = xs->xs_control; 384 385 if (flags & XS_CTL_DATA_UIO) 386 panic("sbic: scsi data uio requested"); 387 388 if (dev->sc_nexus && flags & XS_CTL_POLL) 389 panic("sbic_scsicmd: busy"); 390 391 if (slp->scsipi_scsi.target == slp->scsipi_scsi.adapter_target) 392 return ESCAPE_NOT_SUPPORTED; 393 394 s = splbio(); 395 acb = dev->free_list.tqh_first; 396 if (acb) 397 TAILQ_REMOVE(&dev->free_list, acb, chain); 398 splx(s); 399 400 if (acb == NULL) { 401 #ifdef DEBUG 402 printf("sbic_scsicmd: unable to queue request for target %d\n", 403 slp->scsipi_scsi.target); 404 #ifdef DDB 405 Debugger(); 406 #endif 407 #endif 408 xs->error = XS_DRIVER_STUFFUP; 409 SBIC_TRACE(dev); 410 return(TRY_AGAIN_LATER); 411 } 412 413 acb->flags = ACB_ACTIVE; 414 if (flags & XS_CTL_DATA_IN) 415 acb->flags |= ACB_DATAIN; 416 acb->xs = xs; 417 bcopy(xs->cmd, &acb->cmd, xs->cmdlen); 418 acb->clen = xs->cmdlen; 419 acb->sc_kv.dc_addr = xs->data; 420 acb->sc_kv.dc_count = xs->datalen; 421 acb->pa_addr = xs->data ? (char *)kvtop(xs->data) : 0; /* XXXX check */ 422 423 if (flags & XS_CTL_POLL) { 424 s = splbio(); 425 /* 426 * This has major side effects -- it locks up the machine 427 */ 428 429 dev->sc_flags |= SBICF_ICMD; 430 do { 431 while(dev->sc_nexus) 432 sbicpoll(dev); 433 dev->sc_nexus = acb; 434 dev->sc_stat[0] = -1; 435 dev->sc_xs = xs; 436 dev->target = slp->scsipi_scsi.target; 437 dev->lun = slp->scsipi_scsi.lun; 438 stat = sbicicmd(dev, slp->scsipi_scsi.target, slp->scsipi_scsi.lun, 439 &acb->cmd, acb->clen, 440 acb->sc_kv.dc_addr, acb->sc_kv.dc_count); 441 } while (dev->sc_nexus != acb); 442 sbic_scsidone(acb, stat); 443 444 splx(s); 445 SBIC_TRACE(dev); 446 return(COMPLETE); 447 } 448 449 s = splbio(); 450 TAILQ_INSERT_TAIL(&dev->ready_list, acb, chain); 451 452 if (dev->sc_nexus) { 453 splx(s); 454 SBIC_TRACE(dev); 455 return(SUCCESSFULLY_QUEUED); 456 } 457 458 /* 459 * nothing is active, try to start it now. 460 */ 461 sbic_sched(dev); 462 splx(s); 463 464 SBIC_TRACE(dev); 465 /* TODO: add sbic_poll to do XS_CTL_POLL operations */ 466 #if 0 467 if (flags & XS_CTL_POLL) 468 return(COMPLETE); 469 #endif 470 return(SUCCESSFULLY_QUEUED); 471 } 472 473 /* 474 * attempt to start the next available command 475 */ 476 void 477 sbic_sched(dev) 478 struct sbic_softc *dev; 479 { 480 struct scsipi_xfer *xs; 481 struct scsipi_link *slp; 482 struct sbic_acb *acb; 483 int flags, /*phase,*/ stat, i; 484 485 SBIC_TRACE(dev); 486 if (dev->sc_nexus) 487 return; /* a command is current active */ 488 489 SBIC_TRACE(dev); 490 for (acb = dev->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) { 491 slp = acb->xs->sc_link; 492 i = slp->scsipi_scsi.target; 493 if (!(dev->sc_tinfo[i].lubusy & (1 << slp->scsipi_scsi.lun))) { 494 struct sbic_tinfo *ti = &dev->sc_tinfo[i]; 495 496 TAILQ_REMOVE(&dev->ready_list, acb, chain); 497 dev->sc_nexus = acb; 498 slp = acb->xs->sc_link; 499 ti = &dev->sc_tinfo[slp->scsipi_scsi.target]; 500 ti->lubusy |= (1 << slp->scsipi_scsi.lun); 501 acb->sc_pa.dc_addr = acb->pa_addr; /* XXXX check */ 502 break; 503 } 504 } 505 506 SBIC_TRACE(dev); 507 if (acb == NULL) 508 return; /* did not find an available command */ 509 510 dev->sc_xs = xs = acb->xs; 511 slp = xs->sc_link; 512 flags = xs->xs_control; 513 514 if (flags & XS_CTL_RESET) 515 sbicreset(dev); 516 517 #ifdef DEBUG 518 if( data_pointer_debug > 1 ) 519 printf("sbic_sched(%d,%d)\n",slp->scsipi_scsi.target, 520 slp->scsipi_scsi.lun); 521 #endif 522 dev->sc_stat[0] = -1; 523 dev->target = slp->scsipi_scsi.target; 524 dev->lun = slp->scsipi_scsi.lun; 525 if ( flags & XS_CTL_POLL || ( !sbic_parallel_operations 526 && (sbicdmaok(dev, xs) == 0))) 527 stat = sbicicmd(dev, slp->scsipi_scsi.target, 528 slp->scsipi_scsi.lun, &acb->cmd, 529 acb->clen, acb->sc_kv.dc_addr, acb->sc_kv.dc_count); 530 else if (sbicgo(dev, xs) == 0 && xs->error != XS_SELTIMEOUT) { 531 SBIC_TRACE(dev); 532 return; 533 } else 534 stat = dev->sc_stat[0]; 535 536 sbic_scsidone(acb, stat); 537 SBIC_TRACE(dev); 538 } 539 540 void 541 sbic_scsidone(acb, stat) 542 struct sbic_acb *acb; 543 int stat; 544 { 545 struct scsipi_xfer *xs; 546 struct scsipi_link *slp; 547 struct sbic_softc *dev; 548 int dosched = 0; 549 550 xs = acb->xs; 551 slp = xs->sc_link; 552 dev = slp->adapter_softc; 553 SBIC_TRACE(dev); 554 #ifdef DIAGNOSTIC 555 if (acb == NULL || xs == NULL) { 556 printf("sbic_scsidone -- (%d,%d) no scsi_xfer\n", 557 dev->target, dev->lun); 558 #ifdef DDB 559 Debugger(); 560 #endif 561 return; 562 } 563 #endif 564 /* 565 * is this right? 566 */ 567 xs->status = stat; 568 569 #ifdef DEBUG 570 if( data_pointer_debug > 1 ) 571 printf("scsidone: (%d,%d)->(%d,%d)%02x\n", 572 slp->scsipi_scsi.target, slp->scsipi_scsi.lun, 573 dev->target, dev->lun, stat); 574 if( xs->sc_link->scsipi_scsi.target == 575 dev->sc_link.scsipi_scsi.adapter_target ) 576 panic("target == hostid"); 577 #endif 578 579 if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) { 580 if (stat == SCSI_CHECK) { 581 /* Schedule a REQUEST SENSE */ 582 struct scsipi_sense *ss = (void *)&acb->cmd; 583 #ifdef DEBUG 584 if (report_sense) 585 printf("sbic_scsidone: autosense %02x targ %d lun %d", 586 acb->cmd.opcode, slp->scsipi_scsi.target, 587 slp->scsipi_scsi.lun); 588 #endif 589 bzero(ss, sizeof(*ss)); 590 ss->opcode = REQUEST_SENSE; 591 ss->byte2 = slp->scsipi_scsi.lun << 5; 592 ss->length = sizeof(struct scsipi_sense_data); 593 acb->clen = sizeof(*ss); 594 acb->sc_kv.dc_addr = (char *)&xs->sense.scsi_sense; 595 acb->sc_kv.dc_count = sizeof(struct scsipi_sense_data); 596 acb->pa_addr = (char *)kvtop((u_char *)&xs->sense.scsi_sense); /* XXX check */ 597 acb->flags = ACB_ACTIVE | ACB_CHKSENSE | ACB_DATAIN; 598 TAILQ_INSERT_HEAD(&dev->ready_list, acb, chain); 599 dev->sc_tinfo[slp->scsipi_scsi.target].lubusy &= 600 ~(1 << slp->scsipi_scsi.lun); 601 dev->sc_tinfo[slp->scsipi_scsi.target].senses++; 602 if (dev->sc_nexus == acb) { 603 dev->sc_nexus = NULL; 604 dev->sc_xs = NULL; 605 sbic_sched(dev); 606 } 607 SBIC_TRACE(dev); 608 return; 609 } 610 } 611 if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) { 612 xs->error = XS_SENSE; 613 #ifdef DEBUG 614 if (report_sense) 615 printf(" => %02x %02x\n", xs->sense.scsi_sense.flags, 616 xs->sense.scsi_sense.extra_bytes[3]); 617 #endif 618 } else { 619 xs->resid = 0; /* XXXX */ 620 } 621 #if whataboutthisone 622 case SCSI_BUSY: 623 xs->error = XS_BUSY; 624 break; 625 #endif 626 xs->xs_status |= XS_STS_DONE; 627 628 /* 629 * Remove the ACB from whatever queue it's on. We have to do a bit of 630 * a hack to figure out which queue it's on. Note that it is *not* 631 * necessary to cdr down the ready queue, but we must cdr down the 632 * nexus queue and see if it's there, so we can mark the unit as no 633 * longer busy. This code is sickening, but it works. 634 */ 635 if (acb == dev->sc_nexus) { 636 dev->sc_nexus = NULL; 637 dev->sc_xs = NULL; 638 dev->sc_tinfo[slp->scsipi_scsi.target].lubusy &= 639 ~(1<<slp->scsipi_scsi.lun); 640 if (dev->ready_list.tqh_first) 641 dosched = 1; /* start next command */ 642 } else if (dev->ready_list.tqh_last == &acb->chain.tqe_next) { 643 TAILQ_REMOVE(&dev->ready_list, acb, chain); 644 } else { 645 register struct sbic_acb *acb2; 646 for (acb2 = dev->nexus_list.tqh_first; acb2; 647 acb2 = acb2->chain.tqe_next) { 648 if (acb2 == acb) { 649 TAILQ_REMOVE(&dev->nexus_list, acb, chain); 650 dev->sc_tinfo[slp->scsipi_scsi.target].lubusy 651 &= ~(1<<slp->scsipi_scsi.lun); 652 break; 653 } 654 } 655 if (acb2) 656 ; 657 else if (acb->chain.tqe_next) { 658 TAILQ_REMOVE(&dev->ready_list, acb, chain); 659 } else { 660 printf("%s: can't find matching acb\n", 661 dev->sc_dev.dv_xname); 662 #ifdef DDB 663 Debugger(); 664 #endif 665 } 666 } 667 /* Put it on the free list. */ 668 acb->flags = ACB_FREE; 669 TAILQ_INSERT_HEAD(&dev->free_list, acb, chain); 670 671 dev->sc_tinfo[slp->scsipi_scsi.target].cmds++; 672 673 scsipi_done(xs); 674 675 if (dosched) 676 sbic_sched(dev); 677 SBIC_TRACE(dev); 678 } 679 680 int 681 sbicdmaok(dev, xs) 682 struct sbic_softc *dev; 683 struct scsipi_xfer *xs; 684 { 685 if (sbic_no_dma || !xs->datalen || xs->datalen & 0x1 || 686 (u_int)xs->data & 0x3) 687 return(0); 688 /* 689 * controller supports dma to any addresses? 690 */ 691 else if ((dev->sc_flags & SBICF_BADDMA) == 0) 692 return(1); 693 /* 694 * this address is ok for dma? 695 */ 696 else if (sbiccheckdmap(xs->data, xs->datalen, dev->sc_dmamask) == 0) 697 return(1); 698 /* 699 * we have a bounce buffer? 700 */ 701 else if (dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce) 702 return(1); 703 /* 704 * try to get one 705 */ 706 else if ((dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce 707 = (char *)alloc_z2mem(MAXPHYS))) { 708 if (isztwomem(dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce)) 709 printf("alloc ZII target %d bounce pa 0x%x\n", 710 xs->sc_link->scsipi_scsi.target, 711 kvtop(dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce)); 712 else if (dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce) 713 printf("alloc CHIP target %d bounce pa 0x%p\n", 714 xs->sc_link->scsipi_scsi.target, 715 PREP_DMA_MEM(dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce)); 716 return(1); 717 } 718 719 return(0); 720 } 721 722 723 int 724 sbicwait(regs, until, timeo, line) 725 sbic_regmap_t regs; 726 char until; 727 int timeo; 728 int line; 729 { 730 u_char val; 731 int csr; 732 733 SBIC_TRACE((struct sbic_softc *)0); 734 if (timeo == 0) 735 timeo = 1000000; /* some large value.. */ 736 737 GET_SBIC_asr(regs,val); 738 while ((val & until) == 0) { 739 if (timeo-- == 0) { 740 GET_SBIC_csr(regs, csr); 741 printf("sbicwait TIMEO @%d with asr=x%x csr=x%x\n", 742 line, val, csr); 743 #if defined(DDB) && defined(DEBUG) 744 Debugger(); 745 #endif 746 return(val); /* Maybe I should abort */ 747 break; 748 } 749 DELAY(1); 750 GET_SBIC_asr(regs,val); 751 } 752 SBIC_TRACE((struct sbic_softc *)0); 753 return(val); 754 } 755 756 int 757 sbicabort(dev, regs, where) 758 struct sbic_softc *dev; 759 sbic_regmap_t regs; 760 char *where; 761 { 762 u_char csr, asr; 763 764 GET_SBIC_asr(regs, asr); 765 GET_SBIC_csr(regs, csr); 766 767 printf ("%s: abort %s: csr = 0x%02x, asr = 0x%02x\n", 768 dev->sc_dev.dv_xname, where, csr, asr); 769 770 771 #if 0 772 /* Clean up running command */ 773 if (dev->sc_nexus != NULL) { 774 dev->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 775 sbic_scsidone(dev->sc_nexus, dev->sc_stat[0]); 776 } 777 while (acb = dev->nexus_list.tqh_first) { 778 acb->xs->error = XS_DRIVER_STUFFUP; 779 sbic_scsidone(acb, -1 /*acb->stat[0]*/); 780 } 781 #endif 782 783 /* Clean up chip itself */ 784 if (dev->sc_flags & SBICF_SELECTED) { 785 while( asr & SBIC_ASR_DBR ) { 786 /* sbic is jammed w/data. need to clear it */ 787 /* But we don't know what direction it needs to go */ 788 GET_SBIC_data(regs, asr); 789 printf("%s: abort %s: clearing data buffer 0x%02x\n", 790 dev->sc_dev.dv_xname, where, asr); 791 GET_SBIC_asr(regs, asr); 792 if( asr & SBIC_ASR_DBR ) /* Not the read direction, then */ 793 SET_SBIC_data(regs, asr); 794 GET_SBIC_asr(regs, asr); 795 } 796 WAIT_CIP(regs); 797 printf("%s: sbicabort - sending ABORT command\n", dev->sc_dev.dv_xname); 798 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 799 WAIT_CIP(regs); 800 801 GET_SBIC_asr(regs, asr); 802 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) { 803 /* ok, get more drastic.. */ 804 805 printf("%s: sbicabort - asr %x, trying to reset\n", dev->sc_dev.dv_xname, asr); 806 sbicreset(dev); 807 dev->sc_flags &= ~SBICF_SELECTED; 808 return -1; 809 } 810 printf("%s: sbicabort - sending DISC command\n", dev->sc_dev.dv_xname); 811 SET_SBIC_cmd(regs, SBIC_CMD_DISC); 812 813 do { 814 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 815 GET_SBIC_csr (regs, csr); 816 CSR_TRACE('a',csr,asr,0); 817 } while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 818 && (csr != SBIC_CSR_CMD_INVALID)); 819 820 /* lets just hope it worked.. */ 821 dev->sc_flags &= ~SBICF_SELECTED; 822 } 823 return -1; 824 } 825 826 827 /* 828 * Initialize driver-private structures 829 */ 830 831 void 832 sbicinit(dev) 833 struct sbic_softc *dev; 834 { 835 sbic_regmap_t regs; 836 u_int i; 837 struct sbic_acb *acb; 838 u_int inhibit_sync; 839 840 extern u_long scsi_nosync; 841 extern int shift_nosync; 842 843 regs = dev->sc_sbic; 844 845 if ((dev->sc_flags & SBICF_ALIVE) == 0) { 846 TAILQ_INIT(&dev->ready_list); 847 TAILQ_INIT(&dev->nexus_list); 848 TAILQ_INIT(&dev->free_list); 849 dev->sc_nexus = NULL; 850 dev->sc_xs = NULL; 851 acb = dev->sc_acb; 852 bzero(acb, sizeof(dev->sc_acb)); 853 for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) { 854 TAILQ_INSERT_TAIL(&dev->free_list, acb, chain); 855 acb++; 856 } 857 bzero(dev->sc_tinfo, sizeof(dev->sc_tinfo)); 858 #ifdef DEBUG 859 /* make sure timeout is really not needed */ 860 timeout((void *)sbictimeout, dev, 30 * hz); 861 #endif 862 863 } else panic("sbic: reinitializing driver!"); 864 865 dev->sc_flags |= SBICF_ALIVE; 866 dev->sc_flags &= ~SBICF_SELECTED; 867 868 /* initialize inhibit array */ 869 if (scsi_nosync) { 870 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff; 871 shift_nosync += 8; 872 #ifdef DEBUG 873 if (inhibit_sync) 874 printf("%s: Inhibiting synchronous transfer %02x\n", 875 dev->sc_dev.dv_xname, inhibit_sync); 876 #endif 877 for (i = 0; i < 8; ++i) 878 if (inhibit_sync & (1 << i)) 879 sbic_inhibit_sync[i] = 1; 880 } 881 882 sbicreset(dev); 883 } 884 885 void 886 sbicreset(dev) 887 struct sbic_softc *dev; 888 { 889 sbic_regmap_t regs; 890 u_int my_id, s; 891 u_char csr; 892 #if 0 893 u_int i; 894 struct sbic_acb *acb; 895 #endif 896 897 regs = dev->sc_sbic; 898 #if 0 899 if (dev->sc_flags & SBICF_ALIVE) { 900 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 901 WAIT_CIP(regs); 902 } 903 #else 904 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 905 WAIT_CIP(regs); 906 #endif 907 s = splbio(); 908 my_id = dev->sc_link.scsipi_scsi.adapter_target & SBIC_ID_MASK; 909 910 /* Enable advanced mode */ 911 my_id |= SBIC_ID_EAF /*| SBIC_ID_EHP*/ ; 912 SET_SBIC_myid(regs, my_id); 913 914 /* 915 * Disable interrupts (in dmainit) then reset the chip 916 */ 917 SET_SBIC_cmd(regs, SBIC_CMD_RESET); 918 DELAY(25); 919 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 920 GET_SBIC_csr(regs, csr); /* clears interrupt also */ 921 922 if (dev->sc_clkfreq < 110) 923 my_id |= SBIC_ID_FS_8_10; 924 else if (dev->sc_clkfreq < 160) 925 my_id |= SBIC_ID_FS_12_15; 926 else if (dev->sc_clkfreq < 210) 927 my_id |= SBIC_ID_FS_16_20; 928 929 SET_SBIC_myid(regs, my_id); 930 931 /* 932 * Set up various chip parameters 933 */ 934 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /* | SBIC_CTL_HSP */ 935 | SBIC_MACHINE_DMA_MODE); 936 /* 937 * don't allow (re)selection (SBIC_RID_ES) 938 * until we can handle target mode!! 939 */ 940 SET_SBIC_rselid(regs, SBIC_RID_ER); 941 SET_SBIC_syn(regs, 0); /* asynch for now */ 942 943 /* 944 * anything else was zeroed by reset 945 */ 946 splx(s); 947 948 #if 0 949 if ((dev->sc_flags & SBICF_ALIVE) == 0) { 950 TAILQ_INIT(&dev->ready_list); 951 TAILQ_INIT(&dev->nexus_list); 952 TAILQ_INIT(&dev->free_list); 953 dev->sc_nexus = NULL; 954 dev->sc_xs = NULL; 955 acb = dev->sc_acb; 956 bzero(acb, sizeof(dev->sc_acb)); 957 for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) { 958 TAILQ_INSERT_TAIL(&dev->free_list, acb, chain); 959 acb++; 960 } 961 bzero(dev->sc_tinfo, sizeof(dev->sc_tinfo)); 962 } else { 963 if (dev->sc_nexus != NULL) { 964 dev->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 965 sbic_scsidone(dev->sc_nexus, dev->sc_stat[0]); 966 } 967 while (acb = dev->nexus_list.tqh_first) { 968 acb->xs->error = XS_DRIVER_STUFFUP; 969 sbic_scsidone(acb, -1 /*acb->stat[0]*/); 970 } 971 } 972 973 dev->sc_flags |= SBICF_ALIVE; 974 #endif 975 dev->sc_flags &= ~SBICF_SELECTED; 976 } 977 978 void 979 sbicerror(dev, regs, csr) 980 struct sbic_softc *dev; 981 sbic_regmap_t regs; 982 u_char csr; 983 { 984 struct scsipi_xfer *xs; 985 986 xs = dev->sc_xs; 987 988 #ifdef DIAGNOSTIC 989 if (xs == NULL) 990 panic("sbicerror"); 991 #endif 992 if (xs->xs_control & XS_CTL_SILENT) 993 return; 994 995 printf("%s: ", dev->sc_dev.dv_xname); 996 printf("csr == 0x%02x\n", csr); /* XXX */ 997 } 998 999 /* 1000 * select the bus, return when selected or error. 1001 */ 1002 int 1003 sbicselectbus(dev, regs, target, lun, our_addr) 1004 struct sbic_softc *dev; 1005 sbic_regmap_t regs; 1006 u_char target, lun, our_addr; 1007 { 1008 u_char asr, csr, id; 1009 1010 SBIC_TRACE(dev); 1011 QPRINTF(("sbicselectbus %d\n", target)); 1012 1013 /* 1014 * if we're already selected, return (XXXX panic maybe?) 1015 */ 1016 if (dev->sc_flags & SBICF_SELECTED) { 1017 SBIC_TRACE(dev); 1018 return(1); 1019 } 1020 1021 /* 1022 * issue select 1023 */ 1024 SBIC_TC_PUT(regs, 0); 1025 SET_SBIC_selid(regs, target); 1026 SET_SBIC_timeo(regs, SBIC_TIMEOUT(250,dev->sc_clkfreq)); 1027 1028 /* 1029 * set sync or async 1030 */ 1031 if (dev->sc_sync[target].state == SYNC_DONE) 1032 SET_SBIC_syn(regs, SBIC_SYN (dev->sc_sync[target].offset, 1033 dev->sc_sync[target].period)); 1034 else 1035 SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period)); 1036 1037 GET_SBIC_asr(regs, asr); 1038 if( asr & (SBIC_ASR_INT|SBIC_ASR_BSY) ) { 1039 /* This means we got ourselves reselected upon */ 1040 /* printf("sbicselectbus: INT/BSY asr %02x\n", asr);*/ 1041 #ifdef DDB 1042 /* Debugger();*/ 1043 #endif 1044 SBIC_TRACE(dev); 1045 return 1; 1046 } 1047 1048 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN); 1049 1050 /* 1051 * wait for select (merged from seperate function may need 1052 * cleanup) 1053 */ 1054 WAIT_CIP(regs); 1055 do { 1056 asr = SBIC_WAIT(regs, SBIC_ASR_INT | SBIC_ASR_LCI, 0); 1057 if (asr & SBIC_ASR_LCI) { 1058 #ifdef DEBUG 1059 if (reselect_debug) 1060 printf("sbicselectbus: late LCI asr %02x\n", asr); 1061 #endif 1062 SBIC_TRACE(dev); 1063 return 1; 1064 } 1065 GET_SBIC_csr (regs, csr); 1066 CSR_TRACE('s',csr,asr,target); 1067 QPRINTF(("%02x ", csr)); 1068 if( csr == SBIC_CSR_RSLT_NI || csr == SBIC_CSR_RSLT_IFY) { 1069 #ifdef DEBUG 1070 if(reselect_debug) 1071 printf("sbicselectbus: reselected asr %02x\n", asr); 1072 #endif 1073 /* We need to handle this now so we don't lock up later */ 1074 sbicnextstate(dev, csr, asr); 1075 SBIC_TRACE(dev); 1076 return 1; 1077 } 1078 if( csr == SBIC_CSR_SLT || csr == SBIC_CSR_SLT_ATN) { 1079 panic("sbicselectbus: target issued select!"); 1080 return 1; 1081 } 1082 } while (csr != (SBIC_CSR_MIS_2|MESG_OUT_PHASE) 1083 && csr != (SBIC_CSR_MIS_2|CMD_PHASE) && csr != SBIC_CSR_SEL_TIMEO); 1084 1085 /* Enable (or not) reselection */ 1086 if(!sbic_enable_reselect && dev->nexus_list.tqh_first == NULL) 1087 SET_SBIC_rselid (regs, 0); 1088 else 1089 SET_SBIC_rselid (regs, SBIC_RID_ER); 1090 1091 if (csr == (SBIC_CSR_MIS_2|CMD_PHASE)) { 1092 dev->sc_flags |= SBICF_SELECTED; /* device ignored ATN */ 1093 GET_SBIC_selid(regs, id); 1094 dev->target = id; 1095 GET_SBIC_tlun(regs,dev->lun); 1096 if( dev->lun & SBIC_TLUN_VALID ) 1097 dev->lun &= SBIC_TLUN_MASK; 1098 else 1099 dev->lun = lun; 1100 } else if (csr == (SBIC_CSR_MIS_2|MESG_OUT_PHASE)) { 1101 /* 1102 * Send identify message 1103 * (SCSI-2 requires an identify msg (?)) 1104 */ 1105 GET_SBIC_selid(regs, id); 1106 dev->target = id; 1107 GET_SBIC_tlun(regs,dev->lun); 1108 if( dev->lun & SBIC_TLUN_VALID ) 1109 dev->lun &= SBIC_TLUN_MASK; 1110 else 1111 dev->lun = lun; 1112 /* 1113 * handle drives that don't want to be asked 1114 * whether to go sync at all. 1115 */ 1116 if (sbic_inhibit_sync[id] 1117 && dev->sc_sync[id].state == SYNC_START) { 1118 #ifdef DEBUG 1119 if (sync_debug) 1120 printf("Forcing target %d asynchronous.\n", id); 1121 #endif 1122 dev->sc_sync[id].offset = 0; 1123 dev->sc_sync[id].period = sbic_min_period; 1124 dev->sc_sync[id].state = SYNC_DONE; 1125 } 1126 1127 1128 if (dev->sc_sync[id].state != SYNC_START){ 1129 if( dev->sc_xs->xs_control & XS_CTL_POLL 1130 || (dev->sc_flags & SBICF_ICMD) 1131 || !sbic_enable_reselect ) 1132 SEND_BYTE (regs, MSG_IDENTIFY | lun); 1133 else 1134 SEND_BYTE (regs, MSG_IDENTIFY_DR | lun); 1135 } else { 1136 /* 1137 * try to initiate a sync transfer. 1138 * So compose the sync message we're going 1139 * to send to the target 1140 */ 1141 1142 #ifdef DEBUG 1143 if (sync_debug) 1144 printf("Sending sync request to target %d ... ", 1145 id); 1146 #endif 1147 /* 1148 * setup scsi message sync message request 1149 */ 1150 dev->sc_msg[0] = MSG_IDENTIFY | lun; 1151 dev->sc_msg[1] = MSG_EXT_MESSAGE; 1152 dev->sc_msg[2] = 3; 1153 dev->sc_msg[3] = MSG_SYNC_REQ; 1154 dev->sc_msg[4] = sbictoscsiperiod(dev, regs, 1155 sbic_min_period); 1156 dev->sc_msg[5] = sbic_max_offset; 1157 1158 if (sbicxfstart(regs, 6, MESG_OUT_PHASE, sbic_cmd_wait)) 1159 sbicxfout(regs, 6, dev->sc_msg, MESG_OUT_PHASE); 1160 1161 dev->sc_sync[id].state = SYNC_SENT; 1162 #ifdef DEBUG 1163 if (sync_debug) 1164 printf ("sent\n"); 1165 #endif 1166 } 1167 1168 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 1169 GET_SBIC_csr (regs, csr); 1170 CSR_TRACE('y',csr,asr,target); 1171 QPRINTF(("[%02x]", csr)); 1172 #ifdef DEBUG 1173 if (sync_debug && dev->sc_sync[id].state == SYNC_SENT) 1174 printf("csr-result of last msgout: 0x%x\n", csr); 1175 #endif 1176 1177 if (csr != SBIC_CSR_SEL_TIMEO) 1178 dev->sc_flags |= SBICF_SELECTED; 1179 } 1180 if (csr == SBIC_CSR_SEL_TIMEO) 1181 dev->sc_xs->error = XS_SELTIMEOUT; 1182 1183 QPRINTF(("\n")); 1184 1185 SBIC_TRACE(dev); 1186 return(csr == SBIC_CSR_SEL_TIMEO); 1187 } 1188 1189 int 1190 sbicxfstart(regs, len, phase, wait) 1191 sbic_regmap_t regs; 1192 int len, wait; 1193 u_char phase; 1194 { 1195 u_char id; 1196 1197 switch (phase) { 1198 case DATA_IN_PHASE: 1199 case MESG_IN_PHASE: 1200 GET_SBIC_selid (regs, id); 1201 id |= SBIC_SID_FROM_SCSI; 1202 SET_SBIC_selid (regs, id); 1203 SBIC_TC_PUT (regs, (unsigned)len); 1204 break; 1205 case DATA_OUT_PHASE: 1206 case MESG_OUT_PHASE: 1207 case CMD_PHASE: 1208 GET_SBIC_selid (regs, id); 1209 id &= ~SBIC_SID_FROM_SCSI; 1210 SET_SBIC_selid (regs, id); 1211 SBIC_TC_PUT (regs, (unsigned)len); 1212 break; 1213 default: 1214 SBIC_TC_PUT (regs, 0); 1215 } 1216 QPRINTF(("sbicxfstart %d, %d, %d\n", len, phase, wait)); 1217 1218 return(1); 1219 } 1220 1221 int 1222 sbicxfout(regs, len, bp, phase) 1223 sbic_regmap_t regs; 1224 int len; 1225 void *bp; 1226 int phase; 1227 { 1228 u_char orig_csr, asr, *buf; 1229 int wait; 1230 1231 buf = bp; 1232 wait = sbic_data_wait; 1233 1234 QPRINTF(("sbicxfout {%d} %02x %02x %02x %02x %02x " 1235 "%02x %02x %02x %02x %02x\n", len, buf[0], buf[1], buf[2], 1236 buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9])); 1237 1238 GET_SBIC_csr (regs, orig_csr); 1239 CSR_TRACE('>',orig_csr,0,0); 1240 1241 /* 1242 * sigh.. WD-PROTO strikes again.. sending the command in one go 1243 * causes the chip to lock up if talking to certain (misbehaving?) 1244 * targets. Anyway, this procedure should work for all targets, but 1245 * it's slightly slower due to the overhead 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 while ((asr & SBIC_ASR_DBR) == 0) { 1252 if ((asr & SBIC_ASR_INT) || --wait < 0) { 1253 #ifdef DEBUG 1254 if (sbic_debug) 1255 printf("sbicxfout fail: l%d i%x w%d\n", 1256 len, asr, wait); 1257 #endif 1258 return (len); 1259 } 1260 /* DELAY(1);*/ 1261 GET_SBIC_asr (regs, asr); 1262 } 1263 1264 SET_SBIC_data (regs, *buf); 1265 buf++; 1266 } 1267 SBIC_TC_GET(regs, len); 1268 QPRINTF(("sbicxfout done %d bytes\n", len)); 1269 /* 1270 * this leaves with one csr to be read 1271 */ 1272 return(0); 1273 } 1274 1275 /* returns # bytes left to read */ 1276 int 1277 sbicxfin(regs, len, bp) 1278 sbic_regmap_t regs; 1279 int len; 1280 void *bp; 1281 { 1282 int wait; 1283 u_char *obp, *buf; 1284 u_char orig_csr, csr, asr; 1285 1286 wait = sbic_data_wait; 1287 obp = bp; 1288 buf = bp; 1289 1290 GET_SBIC_csr (regs, orig_csr); 1291 CSR_TRACE('<',orig_csr,0,0); 1292 1293 QPRINTF(("sbicxfin %d, csr=%02x\n", len, orig_csr)); 1294 1295 WAIT_CIP (regs); 1296 SET_SBIC_cmd (regs, SBIC_CMD_XFER_INFO); 1297 for (;len > 0; len--) { 1298 GET_SBIC_asr (regs, asr); 1299 if((asr & SBIC_ASR_PE)) { 1300 #ifdef DEBUG 1301 printf("sbicxfin parity error: l%d i%x w%d\n", 1302 len, asr, wait); 1303 /* return ((unsigned long)buf - (unsigned long)bp); */ 1304 #ifdef DDB 1305 Debugger(); 1306 #endif 1307 #endif 1308 } 1309 while ((asr & SBIC_ASR_DBR) == 0) { 1310 if ((asr & SBIC_ASR_INT) || --wait < 0) { 1311 #ifdef DEBUG 1312 if (sbic_debug) { 1313 QPRINTF(("sbicxfin fail:{%d} %02x %02x %02x %02x %02x %02x " 1314 "%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2], 1315 obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9])); 1316 printf("sbicxfin fail: l%d i%x w%d\n", 1317 len, asr, wait); 1318 } 1319 #endif 1320 return len; 1321 } 1322 1323 if( ! asr & SBIC_ASR_BSY ) { 1324 GET_SBIC_csr(regs, csr); 1325 CSR_TRACE('<',csr,asr,len); 1326 QPRINTF(("[CSR%02xASR%02x]", csr, asr)); 1327 } 1328 1329 /* DELAY(1);*/ 1330 GET_SBIC_asr (regs, asr); 1331 } 1332 1333 GET_SBIC_data (regs, *buf); 1334 /* QPRINTF(("asr=%02x, csr=%02x, data=%02x\n", asr, csr, *buf));*/ 1335 buf++; 1336 } 1337 1338 QPRINTF(("sbicxfin {%d} %02x %02x %02x %02x %02x %02x " 1339 "%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2], 1340 obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9])); 1341 1342 /* this leaves with one csr to be read */ 1343 return len; 1344 } 1345 1346 /* 1347 * SCSI 'immediate' command: issue a command to some SCSI device 1348 * and get back an 'immediate' response (i.e., do programmed xfer 1349 * to get the response data). 'cbuf' is a buffer containing a scsi 1350 * command of length clen bytes. 'buf' is a buffer of length 'len' 1351 * bytes for data. The transfer direction is determined by the device 1352 * (i.e., by the scsi bus data xfer phase). If 'len' is zero, the 1353 * command must supply no data. 1354 */ 1355 int 1356 sbicicmd(dev, target, lun, cbuf, clen, buf, len) 1357 struct sbic_softc *dev; 1358 void *cbuf, *buf; 1359 int clen, len; 1360 { 1361 sbic_regmap_t regs; 1362 u_char phase, csr, asr; 1363 int wait, i; 1364 struct sbic_acb *acb; 1365 1366 #define CSR_LOG_BUF_SIZE 0 1367 #if CSR_LOG_BUF_SIZE 1368 int bufptr; 1369 int csrbuf[CSR_LOG_BUF_SIZE]; 1370 bufptr=0; 1371 #endif 1372 1373 SBIC_TRACE(dev); 1374 regs = dev->sc_sbic; 1375 acb = dev->sc_nexus; 1376 1377 /* Make sure pointers are OK */ 1378 dev->sc_last = dev->sc_cur = &acb->sc_pa; 1379 dev->sc_tcnt = acb->sc_tcnt = 0; 1380 acb->sc_pa.dc_count = 0; /* No DMA */ 1381 acb->sc_kv.dc_addr = buf; 1382 acb->sc_kv.dc_count = len; 1383 1384 #ifdef DEBUG 1385 routine = 3; 1386 debug_sbic_regs = regs; /* store this to allow debug calls */ 1387 if( data_pointer_debug > 1 ) 1388 printf("sbicicmd(%d,%d):%d\n", target, lun, 1389 acb->sc_kv.dc_count); 1390 #endif 1391 1392 /* 1393 * set the sbic into non-DMA mode 1394 */ 1395 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /*| SBIC_CTL_HSP*/); 1396 1397 dev->sc_stat[0] = 0xff; 1398 dev->sc_msg[0] = 0xff; 1399 i = 1; /* pre-load */ 1400 1401 /* We're stealing the SCSI bus */ 1402 dev->sc_flags |= SBICF_ICMD; 1403 1404 do { 1405 /* 1406 * select the SCSI bus (it's an error if bus isn't free) 1407 */ 1408 if (!( dev->sc_flags & SBICF_SELECTED ) 1409 && sbicselectbus(dev, regs, target, lun, dev->sc_scsiaddr)) { 1410 /* printf("sbicicmd: trying to select busy bus!\n"); */ 1411 dev->sc_flags &= ~SBICF_ICMD; 1412 return(-1); 1413 } 1414 1415 /* 1416 * Wait for a phase change (or error) then let the device sequence 1417 * us through the various SCSI phases. 1418 */ 1419 1420 wait = sbic_cmd_wait; 1421 1422 asr = GET_SBIC_asr (regs, asr); 1423 GET_SBIC_csr (regs, csr); 1424 CSR_TRACE('I',csr,asr,target); 1425 QPRINTF((">ASR:%02xCSR:%02x<", asr, csr)); 1426 1427 #if CSR_LOG_BUF_SIZE 1428 csrbuf[bufptr++] = csr; 1429 #endif 1430 1431 1432 switch (csr) { 1433 case SBIC_CSR_S_XFERRED: 1434 case SBIC_CSR_DISC: 1435 case SBIC_CSR_DISC_1: 1436 dev->sc_flags &= ~SBICF_SELECTED; 1437 GET_SBIC_cmd_phase (regs, phase); 1438 if (phase == 0x60) { 1439 GET_SBIC_tlun (regs, dev->sc_stat[0]); 1440 i = 0; /* done */ 1441 /* break; */ /* Bypass all the state gobldygook */ 1442 } else { 1443 #ifdef DEBUG 1444 if(reselect_debug>1) 1445 printf("sbicicmd: handling disconnect\n"); 1446 #endif 1447 i = SBIC_STATE_DISCONNECT; 1448 } 1449 break; 1450 1451 case SBIC_CSR_XFERRED|CMD_PHASE: 1452 case SBIC_CSR_MIS|CMD_PHASE: 1453 case SBIC_CSR_MIS_1|CMD_PHASE: 1454 case SBIC_CSR_MIS_2|CMD_PHASE: 1455 if (sbicxfstart(regs, clen, CMD_PHASE, sbic_cmd_wait)) 1456 if (sbicxfout(regs, clen, 1457 cbuf, CMD_PHASE)) 1458 i = sbicabort(dev, regs,"icmd sending cmd"); 1459 #if 0 1460 GET_SBIC_csr(regs, csr); /* Lets us reload tcount */ 1461 WAIT_CIP(regs); 1462 GET_SBIC_asr(regs, asr); 1463 CSR_TRACE('I',csr,asr,target); 1464 if( asr & (SBIC_ASR_BSY|SBIC_ASR_LCI|SBIC_ASR_CIP) ) 1465 printf("next: cmd sent asr %02x, csr %02x\n", 1466 asr, csr); 1467 #endif 1468 break; 1469 1470 #if 0 1471 case SBIC_CSR_XFERRED|DATA_OUT_PHASE: 1472 case SBIC_CSR_XFERRED|DATA_IN_PHASE: 1473 case SBIC_CSR_MIS|DATA_OUT_PHASE: 1474 case SBIC_CSR_MIS|DATA_IN_PHASE: 1475 case SBIC_CSR_MIS_1|DATA_OUT_PHASE: 1476 case SBIC_CSR_MIS_1|DATA_IN_PHASE: 1477 case SBIC_CSR_MIS_2|DATA_OUT_PHASE: 1478 case SBIC_CSR_MIS_2|DATA_IN_PHASE: 1479 if (acb->sc_kv.dc_count <= 0) 1480 i = sbicabort(dev, regs, "icmd out of data"); 1481 else { 1482 wait = sbic_data_wait; 1483 if (sbicxfstart(regs, 1484 acb->sc_kv.dc_count, 1485 SBIC_PHASE(csr), wait)) 1486 if (csr & 0x01) 1487 /* data in? */ 1488 i=sbicxfin(regs, 1489 acb->sc_kv.dc_count, 1490 acb->sc_kv.dc_addr); 1491 else 1492 i=sbicxfout(regs, 1493 acb->sc_kv.dc_count, 1494 acb->sc_kv.dc_addr, 1495 SBIC_PHASE(csr)); 1496 acb->sc_kv.dc_addr += 1497 (acb->sc_kv.dc_count - i); 1498 acb->sc_kv.dc_count = i; 1499 i = 1; 1500 } 1501 break; 1502 1503 #endif 1504 case SBIC_CSR_XFERRED|STATUS_PHASE: 1505 case SBIC_CSR_MIS|STATUS_PHASE: 1506 case SBIC_CSR_MIS_1|STATUS_PHASE: 1507 case SBIC_CSR_MIS_2|STATUS_PHASE: 1508 /* 1509 * the sbic does the status/cmd-complete reading ok, 1510 * so do this with its hi-level commands. 1511 */ 1512 #ifdef DEBUG 1513 if(sbic_debug) 1514 printf("SBICICMD status phase\n"); 1515 #endif 1516 SBIC_TC_PUT(regs, 0); 1517 SET_SBIC_cmd_phase(regs, 0x46); 1518 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER); 1519 break; 1520 1521 #if THIS_IS_A_RESERVED_STATE 1522 case BUS_FREE_PHASE: /* This is not legal */ 1523 if( dev->sc_stat[0] != 0xff ) 1524 goto out; 1525 break; 1526 #endif 1527 1528 default: 1529 i = sbicnextstate(dev, csr, asr); 1530 } 1531 1532 /* 1533 * make sure the last command was taken, 1534 * ie. we're not hunting after an ignored command.. 1535 */ 1536 GET_SBIC_asr(regs, asr); 1537 1538 /* tapes may take a loooong time.. */ 1539 while (asr & SBIC_ASR_BSY){ 1540 if(asr & SBIC_ASR_DBR) { 1541 printf("sbicicmd: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", 1542 csr,asr); 1543 #ifdef DDB 1544 Debugger(); 1545 #endif 1546 /* SBIC is jammed */ 1547 /* DUNNO which direction */ 1548 /* Try old direction */ 1549 GET_SBIC_data(regs,i); 1550 GET_SBIC_asr(regs, asr); 1551 if( asr & SBIC_ASR_DBR) /* Wants us to write */ 1552 SET_SBIC_data(regs,i); 1553 } 1554 GET_SBIC_asr(regs, asr); 1555 } 1556 1557 /* 1558 * wait for last command to complete 1559 */ 1560 if (asr & SBIC_ASR_LCI) { 1561 printf("sbicicmd: last command ignored\n"); 1562 } 1563 else if( i == 1 ) /* Bsy */ 1564 SBIC_WAIT (regs, SBIC_ASR_INT, wait); 1565 1566 /* 1567 * do it again 1568 */ 1569 } while ( i > 0 && dev->sc_stat[0] == 0xff); 1570 1571 /* Sometimes we need to do an extra read of the CSR */ 1572 GET_SBIC_csr(regs, csr); 1573 CSR_TRACE('I',csr,asr,0xff); 1574 1575 #if CSR_LOG_BUF_SIZE 1576 if(reselect_debug>1) 1577 for(i=0; i<bufptr; i++) 1578 printf("CSR:%02x", csrbuf[i]); 1579 #endif 1580 1581 #ifdef DEBUG 1582 if(data_pointer_debug > 1) 1583 printf("sbicicmd done(%d,%d):%d =%d=\n", 1584 dev->target, lun, 1585 acb->sc_kv.dc_count, 1586 dev->sc_stat[0]); 1587 #endif 1588 1589 QPRINTF(("=STS:%02x=", dev->sc_stat[0])); 1590 dev->sc_flags &= ~SBICF_ICMD; 1591 1592 SBIC_TRACE(dev); 1593 return(dev->sc_stat[0]); 1594 } 1595 1596 /* 1597 * Finish SCSI xfer command: After the completion interrupt from 1598 * a read/write operation, sequence through the final phases in 1599 * programmed i/o. This routine is a lot like sbicicmd except we 1600 * skip (and don't allow) the select, cmd out and data in/out phases. 1601 */ 1602 void 1603 sbicxfdone(dev, regs, target) 1604 struct sbic_softc *dev; 1605 sbic_regmap_t regs; 1606 int target; 1607 { 1608 u_char phase, asr, csr; 1609 int s; 1610 1611 SBIC_TRACE(dev); 1612 QPRINTF(("{")); 1613 s = splbio(); 1614 1615 /* 1616 * have the sbic complete on its own 1617 */ 1618 SBIC_TC_PUT(regs, 0); 1619 SET_SBIC_cmd_phase(regs, 0x46); 1620 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER); 1621 1622 do { 1623 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 1624 GET_SBIC_csr (regs, csr); 1625 CSR_TRACE('f',csr,asr,target); 1626 QPRINTF(("%02x:", csr)); 1627 } while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 1628 && (csr != SBIC_CSR_S_XFERRED)); 1629 1630 dev->sc_flags &= ~SBICF_SELECTED; 1631 1632 GET_SBIC_cmd_phase (regs, phase); 1633 QPRINTF(("}%02x", phase)); 1634 if (phase == 0x60) 1635 GET_SBIC_tlun(regs, dev->sc_stat[0]); 1636 else 1637 sbicerror(dev, regs, csr); 1638 1639 QPRINTF(("=STS:%02x=\n", dev->sc_stat[0])); 1640 splx(s); 1641 SBIC_TRACE(dev); 1642 } 1643 1644 /* 1645 * No DMA chains 1646 */ 1647 1648 int 1649 sbicgo(dev, xs) 1650 struct sbic_softc *dev; 1651 struct scsipi_xfer *xs; 1652 { 1653 int i, dmaflags, count, usedma; 1654 u_char csr, asr, *addr; 1655 sbic_regmap_t regs; 1656 struct sbic_acb *acb; 1657 1658 SBIC_TRACE(dev); 1659 dev->target = xs->sc_link->scsipi_scsi.target; 1660 dev->lun = xs->sc_link->scsipi_scsi.lun; 1661 acb = dev->sc_nexus; 1662 regs = dev->sc_sbic; 1663 1664 usedma = sbicdmaok(dev, xs); 1665 #ifdef DEBUG 1666 routine = 1; 1667 debug_sbic_regs = regs; /* store this to allow debug calls */ 1668 if( data_pointer_debug > 1 ) 1669 printf("sbicgo(%d,%d)\n", dev->target, dev->lun); 1670 #endif 1671 1672 /* 1673 * set the sbic into DMA mode 1674 */ 1675 if( usedma ) 1676 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI | 1677 SBIC_MACHINE_DMA_MODE); 1678 else 1679 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 1680 1681 1682 /* 1683 * select the SCSI bus (it's an error if bus isn't free) 1684 */ 1685 if (sbicselectbus(dev, regs, dev->target, dev->lun, 1686 dev->sc_scsiaddr)) { 1687 /* printf("sbicgo: Trying to select busy bus!\n"); */ 1688 SBIC_TRACE(dev); 1689 return(0); /* Not done: needs to be rescheduled */ 1690 } 1691 dev->sc_stat[0] = 0xff; 1692 1693 /* 1694 * Calculate DMA chains now 1695 */ 1696 1697 dmaflags = 0; 1698 if (acb->flags & ACB_DATAIN) 1699 dmaflags |= DMAGO_READ; 1700 1701 1702 /* 1703 * Deal w/bounce buffers. 1704 */ 1705 1706 addr = acb->sc_kv.dc_addr; 1707 count = acb->sc_kv.dc_count; 1708 if (count && (char *)kvtop(addr) != acb->sc_pa.dc_addr) { /* XXXX check */ 1709 printf("sbic: DMA buffer mapping changed %p->%x\n", 1710 acb->sc_pa.dc_addr, kvtop(addr)); 1711 #ifdef DDB 1712 Debugger(); 1713 #endif 1714 } 1715 1716 #ifdef DEBUG 1717 ++sbicdma_ops; /* count total DMA operations */ 1718 #endif 1719 if (count && usedma && dev->sc_flags & SBICF_BADDMA && 1720 sbiccheckdmap(addr, count, dev->sc_dmamask)) { 1721 /* 1722 * need to bounce the dma. 1723 */ 1724 if (dmaflags & DMAGO_READ) { 1725 acb->flags |= ACB_BBUF; 1726 acb->sc_dmausrbuf = addr; 1727 acb->sc_dmausrlen = count; 1728 acb->sc_usrbufpa = (u_char *)kvtop(addr); 1729 if(!dev->sc_tinfo[dev->target].bounce) { 1730 printf("sbicgo: HELP! no bounce allocated for %d\n", 1731 dev->target); 1732 printf("xfer: (%p->%p,%lx)\n", acb->sc_dmausrbuf, 1733 acb->sc_usrbufpa, acb->sc_dmausrlen); 1734 dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce 1735 = (char *)alloc_z2mem(MAXPHYS); 1736 if (isztwomem(dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce)) 1737 printf("alloc ZII target %d bounce pa 0x%x\n", 1738 xs->sc_link->scsipi_scsi.target, 1739 kvtop(dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce)); 1740 else if (dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce) 1741 printf("alloc CHIP target %d bounce pa 0x%p\n", 1742 xs->sc_link->scsipi_scsi.target, 1743 PREP_DMA_MEM(dev->sc_tinfo[xs->sc_link->scsipi_scsi.target].bounce)); 1744 1745 printf("Allocating %d bounce at %x\n", 1746 dev->target, 1747 kvtop(dev->sc_tinfo[dev->target].bounce)); 1748 } 1749 } else { /* write: copy to dma buffer */ 1750 #ifdef DEBUG 1751 if(data_pointer_debug) 1752 printf("sbicgo: copying %x bytes to target %d bounce %x\n", 1753 count, dev->target, 1754 kvtop(dev->sc_tinfo[dev->target].bounce)); 1755 #endif 1756 bcopy (addr, dev->sc_tinfo[dev->target].bounce, count); 1757 } 1758 addr = dev->sc_tinfo[dev->target].bounce;/* and use dma buffer */ 1759 acb->sc_kv.dc_addr = addr; 1760 #ifdef DEBUG 1761 ++sbicdma_bounces; /* count number of bounced */ 1762 #endif 1763 } 1764 1765 /* 1766 * Allocate the DMA chain 1767 */ 1768 1769 /* Set start KVM addresses */ 1770 #if 0 1771 acb->sc_kv.dc_addr = addr; 1772 acb->sc_kv.dc_count = count; 1773 #endif 1774 1775 /* Mark end of segment */ 1776 acb->sc_tcnt = dev->sc_tcnt = 0; 1777 acb->sc_pa.dc_count = 0; 1778 1779 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 1780 SBIC_TRACE(dev); 1781 /* Enable interrupts but don't do any DMA */ 1782 dev->sc_enintr(dev); 1783 if (usedma) { 1784 dev->sc_tcnt = dev->sc_dmago(dev, acb->sc_pa.dc_addr, 1785 acb->sc_pa.dc_count, 1786 dmaflags); 1787 #ifdef DEBUG 1788 dev->sc_dmatimo = dev->sc_tcnt ? 1 : 0; 1789 #endif 1790 } else 1791 dev->sc_dmacmd = 0; /* Don't use DMA */ 1792 dev->sc_flags |= SBICF_INDMA; 1793 /* SBIC_TC_PUT(regs, dev->sc_tcnt); */ /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */ 1794 SBIC_TRACE(dev); 1795 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 1796 1797 /* 1798 * push the data cache ( I think this won't work (EH)) 1799 */ 1800 #if defined(M68040) || defined(M68060) 1801 if (mmutype == MMU_68040 && usedma && count) { 1802 dma_cachectl(addr, count); 1803 if (((u_int)addr & 0xF) || (((u_int)addr + count) & 0xF)) 1804 dev->sc_flags |= SBICF_DCFLUSH; 1805 } 1806 #endif 1807 1808 /* 1809 * enintr() also enables interrupts for the sbic 1810 */ 1811 #ifdef DEBUG 1812 if( data_pointer_debug > 1 ) 1813 printf("sbicgo dmago:%d(%p:%lx)\n", 1814 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 1815 #if 0 1816 /* 1817 * Hmm - this isn't right: asr and csr haven't been set yet. 1818 */ 1819 debug_asr = asr; 1820 debug_csr = csr; 1821 #endif 1822 #endif 1823 1824 /* 1825 * Lets cycle a while then let the interrupt handler take over 1826 */ 1827 1828 asr = GET_SBIC_asr(regs, asr); 1829 do { 1830 GET_SBIC_csr(regs, csr); 1831 CSR_TRACE('g',csr,asr,dev->target); 1832 #ifdef DEBUG 1833 debug_csr = csr; 1834 routine = 1; 1835 #endif 1836 QPRINTF(("go[0x%x]", csr)); 1837 1838 i = sbicnextstate(dev, csr, asr); 1839 1840 WAIT_CIP(regs); 1841 GET_SBIC_asr(regs, asr); 1842 #ifdef DEBUG 1843 debug_asr = asr; 1844 #endif 1845 if(asr & SBIC_ASR_LCI) printf("sbicgo: LCI asr:%02x csr:%02x\n", 1846 asr,csr); 1847 } while( i == SBIC_STATE_RUNNING 1848 && asr & (SBIC_ASR_INT|SBIC_ASR_LCI) ); 1849 1850 CSR_TRACE('g',csr,asr,i<<4); 1851 SBIC_TRACE(dev); 1852 if (i == SBIC_STATE_DONE && dev->sc_stat[0] == 0xff) printf("sbicgo: done & stat = 0xff\n"); 1853 if (i == SBIC_STATE_DONE && dev->sc_stat[0] != 0xff) { 1854 /* if( i == SBIC_STATE_DONE && dev->sc_stat[0] ) { */ 1855 /* Did we really finish that fast? */ 1856 return 1; 1857 } 1858 return 0; 1859 } 1860 1861 1862 int 1863 sbicintr(dev) 1864 struct sbic_softc *dev; 1865 { 1866 sbic_regmap_t regs; 1867 u_char asr, csr; 1868 int i; 1869 1870 regs = dev->sc_sbic; 1871 1872 /* 1873 * pending interrupt? 1874 */ 1875 GET_SBIC_asr (regs, asr); 1876 if ((asr & SBIC_ASR_INT) == 0) 1877 return(0); 1878 1879 SBIC_TRACE(dev); 1880 do { 1881 GET_SBIC_csr(regs, csr); 1882 CSR_TRACE('i',csr,asr,dev->target); 1883 #ifdef DEBUG 1884 debug_csr = csr; 1885 routine = 2; 1886 #endif 1887 QPRINTF(("intr[0x%x]", csr)); 1888 1889 i = sbicnextstate(dev, csr, asr); 1890 1891 WAIT_CIP(regs); 1892 GET_SBIC_asr(regs, asr); 1893 #ifdef DEBUG 1894 debug_asr = asr; 1895 #endif 1896 #if 0 1897 if(asr & SBIC_ASR_LCI) printf("sbicintr: LCI asr:%02x csr:%02x\n", 1898 asr,csr); 1899 #endif 1900 } while(i == SBIC_STATE_RUNNING && 1901 asr & (SBIC_ASR_INT|SBIC_ASR_LCI)); 1902 CSR_TRACE('i',csr,asr,i<<4); 1903 SBIC_TRACE(dev); 1904 return(1); 1905 } 1906 1907 /* 1908 * Run commands and wait for disconnect 1909 */ 1910 int 1911 sbicpoll(dev) 1912 struct sbic_softc *dev; 1913 { 1914 sbic_regmap_t regs; 1915 u_char asr, csr; 1916 int i; 1917 1918 SBIC_TRACE(dev); 1919 regs = dev->sc_sbic; 1920 1921 do { 1922 GET_SBIC_asr (regs, asr); 1923 #ifdef DEBUG 1924 debug_asr = asr; 1925 #endif 1926 GET_SBIC_csr(regs, csr); 1927 CSR_TRACE('p',csr,asr,dev->target); 1928 #ifdef DEBUG 1929 debug_csr = csr; 1930 routine = 2; 1931 #endif 1932 QPRINTF(("poll[0x%x]", csr)); 1933 1934 i = sbicnextstate(dev, csr, asr); 1935 1936 WAIT_CIP(regs); 1937 GET_SBIC_asr(regs, asr); 1938 /* tapes may take a loooong time.. */ 1939 while (asr & SBIC_ASR_BSY){ 1940 if(asr & SBIC_ASR_DBR) { 1941 printf("sbipoll: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", 1942 csr,asr); 1943 #ifdef DDB 1944 Debugger(); 1945 #endif 1946 /* SBIC is jammed */ 1947 /* DUNNO which direction */ 1948 /* Try old direction */ 1949 GET_SBIC_data(regs,i); 1950 GET_SBIC_asr(regs, asr); 1951 if( asr & SBIC_ASR_DBR) /* Wants us to write */ 1952 SET_SBIC_data(regs,i); 1953 } 1954 GET_SBIC_asr(regs, asr); 1955 } 1956 1957 if(asr & SBIC_ASR_LCI) printf("sbicpoll: LCI asr:%02x csr:%02x\n", 1958 asr,csr); 1959 else if( i == 1 ) /* BSY */ 1960 SBIC_WAIT(regs, SBIC_ASR_INT, sbic_cmd_wait); 1961 } while(i == SBIC_STATE_RUNNING); 1962 CSR_TRACE('p',csr,asr,i<<4); 1963 SBIC_TRACE(dev); 1964 return(1); 1965 } 1966 1967 /* 1968 * Handle a single msgin 1969 */ 1970 1971 int 1972 sbicmsgin(dev) 1973 struct sbic_softc *dev; 1974 { 1975 sbic_regmap_t regs; 1976 int recvlen; 1977 u_char asr, csr, *tmpaddr; 1978 1979 regs = dev->sc_sbic; 1980 1981 dev->sc_msg[0] = 0xff; 1982 dev->sc_msg[1] = 0xff; 1983 1984 GET_SBIC_asr(regs, asr); 1985 #ifdef DEBUG 1986 if(reselect_debug>1) 1987 printf("sbicmsgin asr=%02x\n", asr); 1988 #endif 1989 1990 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 1991 1992 GET_SBIC_selid (regs, csr); 1993 SET_SBIC_selid (regs, csr | SBIC_SID_FROM_SCSI); 1994 1995 SBIC_TC_PUT(regs, 0); 1996 tmpaddr = dev->sc_msg; 1997 recvlen = 1; 1998 do { 1999 while( recvlen-- ) { 2000 asr = GET_SBIC_asr(regs, asr); 2001 GET_SBIC_csr(regs, csr); 2002 QPRINTF(("sbicmsgin ready to go (csr,asr)=(%02x,%02x)\n", 2003 csr, asr)); 2004 2005 RECV_BYTE(regs, *tmpaddr); 2006 CSR_TRACE('m',csr,asr,*tmpaddr); 2007 #if 1 2008 /* 2009 * get the command completion interrupt, or we 2010 * can't send a new command (LCI) 2011 */ 2012 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2013 GET_SBIC_csr(regs, csr); 2014 CSR_TRACE('X',csr,asr,dev->target); 2015 #else 2016 WAIT_CIP(regs); 2017 do { 2018 GET_SBIC_asr(regs, asr); 2019 csr = 0xff; 2020 GET_SBIC_csr(regs, csr); 2021 CSR_TRACE('X',csr,asr,dev->target); 2022 if( csr == 0xff ) 2023 printf("sbicmsgin waiting: csr %02x asr %02x\n", csr, asr); 2024 } while( csr == 0xff ); 2025 #endif 2026 #ifdef DEBUG 2027 if(reselect_debug>1) 2028 printf("sbicmsgin: got %02x csr %02x asr %02x\n", 2029 *tmpaddr, csr, asr); 2030 #endif 2031 #if do_parity_check 2032 if( asr & SBIC_ASR_PE ) { 2033 printf ("Parity error"); 2034 /* This code simply does not work. */ 2035 WAIT_CIP(regs); 2036 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 2037 WAIT_CIP(regs); 2038 GET_SBIC_asr(regs, asr); 2039 WAIT_CIP(regs); 2040 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2041 WAIT_CIP(regs); 2042 if( !(asr & SBIC_ASR_LCI) ) 2043 /* Target wants to send garbled msg*/ 2044 continue; 2045 printf("--fixing\n"); 2046 /* loop until a msgout phase occurs on target */ 2047 while(csr & 0x07 != MESG_OUT_PHASE) { 2048 while( asr & SBIC_ASR_BSY && 2049 !(asr & SBIC_ASR_DBR|SBIC_ASR_INT) ) 2050 GET_SBIC_asr(regs, asr); 2051 if( asr & SBIC_ASR_DBR ) 2052 panic("msgin: jammed again!\n"); 2053 GET_SBIC_csr(regs, csr); 2054 CSR_TRACE('e',csr,asr,dev->target); 2055 if( csr & 0x07 != MESG_OUT_PHASE ) { 2056 sbicnextstate(dev, csr, asr); 2057 sbic_save_ptrs(dev, regs, 2058 dev->target, 2059 dev->lun); 2060 } 2061 } 2062 /* Should be msg out by now */ 2063 SEND_BYTE(regs, MSG_PARITY_ERROR); 2064 } 2065 else 2066 #endif 2067 tmpaddr++; 2068 2069 if(recvlen) { 2070 /* Clear ACK */ 2071 WAIT_CIP(regs); 2072 GET_SBIC_asr(regs, asr); 2073 GET_SBIC_csr(regs, csr); 2074 CSR_TRACE('X',csr,asr,dev->target); 2075 QPRINTF(("sbicmsgin pre byte CLR_ACK (csr,asr)=(%02x,%02x)\n", 2076 csr, asr)); 2077 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2078 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2079 } 2080 2081 }; 2082 2083 if(dev->sc_msg[0] == 0xff) { 2084 printf("sbicmsgin: sbic swallowed our message\n"); 2085 break; 2086 } 2087 #ifdef DEBUG 2088 if (sync_debug) 2089 printf("msgin done csr 0x%x asr 0x%x msg 0x%x\n", 2090 csr, asr, dev->sc_msg[0]); 2091 #endif 2092 /* 2093 * test whether this is a reply to our sync 2094 * request 2095 */ 2096 if (MSG_ISIDENTIFY(dev->sc_msg[0])) { 2097 QPRINTF(("IFFY")); 2098 #if 0 2099 /* There is an implied load-ptrs here */ 2100 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 2101 #endif 2102 /* Got IFFY msg -- ack it */ 2103 } else if (dev->sc_msg[0] == MSG_REJECT 2104 && dev->sc_sync[dev->target].state == SYNC_SENT) { 2105 QPRINTF(("REJECT of SYN")); 2106 #ifdef DEBUG 2107 if (sync_debug) 2108 printf("target %d rejected sync, going async\n", 2109 dev->target); 2110 #endif 2111 dev->sc_sync[dev->target].period = sbic_min_period; 2112 dev->sc_sync[dev->target].offset = 0; 2113 dev->sc_sync[dev->target].state = SYNC_DONE; 2114 SET_SBIC_syn(regs, 2115 SBIC_SYN(dev->sc_sync[dev->target].offset, 2116 dev->sc_sync[dev->target].period)); 2117 } else if ((dev->sc_msg[0] == MSG_REJECT)) { 2118 QPRINTF(("REJECT")); 2119 /* 2120 * we'll never REJECt a REJECT message.. 2121 */ 2122 } else if ((dev->sc_msg[0] == MSG_SAVE_DATA_PTR)) { 2123 QPRINTF(("MSG_SAVE_DATA_PTR")); 2124 /* 2125 * don't reject this either. 2126 */ 2127 } else if ((dev->sc_msg[0] == MSG_DISCONNECT)) { 2128 QPRINTF(("DISCONNECT")); 2129 #ifdef DEBUG 2130 if( reselect_debug>1 && dev->sc_msg[0] == MSG_DISCONNECT ) 2131 printf("sbicmsgin: got disconnect msg %s\n", 2132 (dev->sc_flags & SBICF_ICMD)?"rejecting":""); 2133 #endif 2134 if( dev->sc_flags & SBICF_ICMD ) { 2135 /* We're in immediate mode. Prevent disconnects. */ 2136 /* prepare to reject the message, NACK */ 2137 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 2138 WAIT_CIP(regs); 2139 } 2140 } else if (dev->sc_msg[0] == MSG_CMD_COMPLETE ) { 2141 QPRINTF(("CMD_COMPLETE")); 2142 /* !! KLUDGE ALERT !! quite a few drives don't seem to 2143 * really like the current way of sending the 2144 * sync-handshake together with the ident-message, and 2145 * they react by sending command-complete and 2146 * disconnecting right after returning the valid sync 2147 * handshake. So, all I can do is reselect the drive, 2148 * and hope it won't disconnect again. I don't think 2149 * this is valid behavior, but I can't help fixing a 2150 * problem that apparently exists. 2151 * 2152 * Note: we should not get here on `normal' command 2153 * completion, as that condition is handled by the 2154 * high-level sel&xfer resume command used to walk 2155 * thru status/cc-phase. 2156 */ 2157 2158 #ifdef DEBUG 2159 if (sync_debug) 2160 printf ("GOT MSG %d! target %d acting weird.." 2161 " waiting for disconnect...\n", 2162 dev->sc_msg[0], dev->target); 2163 #endif 2164 /* Check to see if sbic is handling this */ 2165 GET_SBIC_asr(regs, asr); 2166 if(asr & SBIC_ASR_BSY) 2167 return SBIC_STATE_RUNNING; 2168 2169 /* Let's try this: Assume it works and set status to 00 */ 2170 dev->sc_stat[0] = 0; 2171 } else if (dev->sc_msg[0] == MSG_EXT_MESSAGE 2172 && tmpaddr == &dev->sc_msg[1]) { 2173 QPRINTF(("ExtMSG\n")); 2174 /* Read in whole extended message */ 2175 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2176 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2177 GET_SBIC_asr(regs, asr); 2178 GET_SBIC_csr(regs, csr); 2179 QPRINTF(("CLR ACK asr %02x, csr %02x\n", asr, csr)); 2180 RECV_BYTE(regs, *tmpaddr); 2181 CSR_TRACE('x',csr,asr,*tmpaddr); 2182 /* Wait for command completion IRQ */ 2183 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2184 recvlen = *tmpaddr++; 2185 QPRINTF(("Recving ext msg, asr %02x csr %02x len %02x\n", 2186 asr, csr, recvlen)); 2187 } else if (dev->sc_msg[0] == MSG_EXT_MESSAGE && dev->sc_msg[1] == 3 2188 && dev->sc_msg[2] == MSG_SYNC_REQ) { 2189 QPRINTF(("SYN")); 2190 dev->sc_sync[dev->target].period = 2191 sbicfromscsiperiod(dev, 2192 regs, dev->sc_msg[3]); 2193 dev->sc_sync[dev->target].offset = dev->sc_msg[4]; 2194 dev->sc_sync[dev->target].state = SYNC_DONE; 2195 SET_SBIC_syn(regs, 2196 SBIC_SYN(dev->sc_sync[dev->target].offset, 2197 dev->sc_sync[dev->target].period)); 2198 printf("%s: target %d now synchronous," 2199 " period=%dns, offset=%d.\n", 2200 dev->sc_dev.dv_xname, dev->target, 2201 dev->sc_msg[3] * 4, dev->sc_msg[4]); 2202 } else { 2203 #ifdef DEBUG 2204 if (sbic_debug || sync_debug) 2205 printf ("sbicmsgin: Rejecting message 0x%02x\n", 2206 dev->sc_msg[0]); 2207 #endif 2208 /* prepare to reject the message, NACK */ 2209 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 2210 WAIT_CIP(regs); 2211 } 2212 /* Clear ACK */ 2213 WAIT_CIP(regs); 2214 GET_SBIC_asr(regs, asr); 2215 GET_SBIC_csr(regs, csr); 2216 CSR_TRACE('X',csr,asr,dev->target); 2217 QPRINTF(("sbicmsgin pre CLR_ACK (csr,asr)=(%02x,%02x)%d\n", 2218 csr, asr, recvlen)); 2219 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2220 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2221 } 2222 #if 0 2223 while((csr == SBIC_CSR_MSGIN_W_ACK) 2224 || (SBIC_PHASE(csr) == MESG_IN_PHASE)); 2225 #else 2226 while (recvlen>0); 2227 #endif 2228 2229 QPRINTF(("sbicmsgin finished: csr %02x, asr %02x\n",csr, asr)); 2230 2231 /* Should still have one CSR to read */ 2232 return SBIC_STATE_RUNNING; 2233 } 2234 2235 2236 /* 2237 * sbicnextstate() 2238 * return: 2239 * 0 == done 2240 * 1 == working 2241 * 2 == disconnected 2242 * -1 == error 2243 */ 2244 int 2245 sbicnextstate(dev, csr, asr) 2246 struct sbic_softc *dev; 2247 u_char csr, asr; 2248 { 2249 sbic_regmap_t regs; 2250 struct sbic_acb *acb; 2251 int i, newtarget, newlun, wait; 2252 #if 0 2253 unsigned tcnt; 2254 #endif 2255 2256 i = 0; 2257 SBIC_TRACE(dev); 2258 regs = dev->sc_sbic; 2259 acb = dev->sc_nexus; 2260 2261 QPRINTF(("next[%02x,%02x]",asr,csr)); 2262 2263 switch (csr) { 2264 case SBIC_CSR_XFERRED|CMD_PHASE: 2265 case SBIC_CSR_MIS|CMD_PHASE: 2266 case SBIC_CSR_MIS_1|CMD_PHASE: 2267 case SBIC_CSR_MIS_2|CMD_PHASE: 2268 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2269 if (sbicxfstart(regs, acb->clen, CMD_PHASE, sbic_cmd_wait)) 2270 if (sbicxfout(regs, acb->clen, 2271 &acb->cmd, CMD_PHASE)) 2272 goto abort; 2273 break; 2274 2275 case SBIC_CSR_XFERRED|STATUS_PHASE: 2276 case SBIC_CSR_MIS|STATUS_PHASE: 2277 case SBIC_CSR_MIS_1|STATUS_PHASE: 2278 case SBIC_CSR_MIS_2|STATUS_PHASE: 2279 /* 2280 * this should be the normal i/o completion case. 2281 * get the status & cmd complete msg then let the 2282 * device driver look at what happened. 2283 */ 2284 sbicxfdone(dev,regs,dev->target); 2285 /* 2286 * check for overlapping cache line, flush if so 2287 */ 2288 #if defined(M68040) || defined(M68060) 2289 if (dev->sc_flags & SBICF_DCFLUSH) { 2290 #if 0 2291 printf("sbic: 68040/68060 DMA cache flush needs" 2292 "fixing? %x:%x\n", 2293 dev->sc_xs->data, dev->sc_xs->datalen); 2294 #endif 2295 } 2296 #endif 2297 #ifdef DEBUG 2298 if( data_pointer_debug > 1 ) 2299 printf("next dmastop: %d(%p:%lx)\n", 2300 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2301 dev->sc_dmatimo = 0; 2302 #endif 2303 dev->sc_dmastop(dev); /* was dmafree */ 2304 if (acb->flags & ACB_BBUF) { 2305 if ((u_char *)kvtop(acb->sc_dmausrbuf) != acb->sc_usrbufpa) 2306 printf("%s: WARNING - buffer mapping changed %p->%x\n", 2307 dev->sc_dev.dv_xname, acb->sc_usrbufpa, 2308 kvtop(acb->sc_dmausrbuf)); 2309 #ifdef DEBUG 2310 if(data_pointer_debug) 2311 printf("sbicgo:copying %lx bytes from target %d bounce %x\n", 2312 acb->sc_dmausrlen, 2313 dev->target, 2314 kvtop(dev->sc_tinfo[dev->target].bounce)); 2315 #endif 2316 bcopy(dev->sc_tinfo[dev->target].bounce, 2317 acb->sc_dmausrbuf, 2318 acb->sc_dmausrlen); 2319 } 2320 dev->sc_flags &= ~(SBICF_INDMA | SBICF_DCFLUSH); 2321 sbic_scsidone(acb, dev->sc_stat[0]); 2322 SBIC_TRACE(dev); 2323 return SBIC_STATE_DONE; 2324 2325 case SBIC_CSR_XFERRED|DATA_OUT_PHASE: 2326 case SBIC_CSR_XFERRED|DATA_IN_PHASE: 2327 case SBIC_CSR_MIS|DATA_OUT_PHASE: 2328 case SBIC_CSR_MIS|DATA_IN_PHASE: 2329 case SBIC_CSR_MIS_1|DATA_OUT_PHASE: 2330 case SBIC_CSR_MIS_1|DATA_IN_PHASE: 2331 case SBIC_CSR_MIS_2|DATA_OUT_PHASE: 2332 case SBIC_CSR_MIS_2|DATA_IN_PHASE: 2333 if( dev->sc_xs->xs_control & XS_CTL_POLL || dev->sc_flags & SBICF_ICMD 2334 || acb->sc_dmacmd == 0 ) { 2335 /* Do PIO */ 2336 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 2337 if (acb->sc_kv.dc_count <= 0) { 2338 printf("sbicnextstate:xfer count %d asr%x csr%x\n", 2339 acb->sc_kv.dc_count, asr, csr); 2340 goto abort; 2341 } 2342 wait = sbic_data_wait; 2343 if( sbicxfstart(regs, 2344 acb->sc_kv.dc_count, 2345 SBIC_PHASE(csr), wait)) { 2346 if( SBIC_PHASE(csr) == DATA_IN_PHASE ) 2347 /* data in? */ 2348 i=sbicxfin(regs, 2349 acb->sc_kv.dc_count, 2350 acb->sc_kv.dc_addr); 2351 else 2352 i=sbicxfout(regs, 2353 acb->sc_kv.dc_count, 2354 acb->sc_kv.dc_addr, 2355 SBIC_PHASE(csr)); 2356 } 2357 acb->sc_kv.dc_addr += 2358 (acb->sc_kv.dc_count - i); 2359 acb->sc_kv.dc_count = i; 2360 } else { 2361 if (acb->sc_kv.dc_count <= 0) { 2362 printf("sbicnextstate:xfer count %d asr%x csr%x\n", 2363 acb->sc_kv.dc_count, asr, csr); 2364 goto abort; 2365 } 2366 /* 2367 * do scatter-gather dma 2368 * hacking the controller chip, ouch.. 2369 */ 2370 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI | 2371 SBIC_MACHINE_DMA_MODE); 2372 /* 2373 * set next dma addr and dec count 2374 */ 2375 #if 0 2376 SBIC_TC_GET(regs, tcnt); 2377 dev->sc_cur->dc_count -= ((dev->sc_tcnt - tcnt) >> 1); 2378 dev->sc_cur->dc_addr += (dev->sc_tcnt - tcnt); 2379 dev->sc_tcnt = acb->sc_tcnt = tcnt; 2380 #else 2381 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2382 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 2383 #endif 2384 #ifdef DEBUG 2385 if( data_pointer_debug > 1 ) 2386 printf("next dmanext: %d(%p:%lx)\n", 2387 dev->target,dev->sc_cur->dc_addr, 2388 dev->sc_tcnt); 2389 dev->sc_dmatimo = 1; 2390 #endif 2391 dev->sc_tcnt = dev->sc_dmanext(dev); 2392 SBIC_TC_PUT(regs, (unsigned)dev->sc_tcnt); 2393 SET_SBIC_cmd(regs, SBIC_CMD_XFER_INFO); 2394 dev->sc_flags |= SBICF_INDMA; 2395 } 2396 break; 2397 2398 case SBIC_CSR_XFERRED|MESG_IN_PHASE: 2399 case SBIC_CSR_MIS|MESG_IN_PHASE: 2400 case SBIC_CSR_MIS_1|MESG_IN_PHASE: 2401 case SBIC_CSR_MIS_2|MESG_IN_PHASE: 2402 SBIC_TRACE(dev); 2403 return sbicmsgin(dev); 2404 2405 case SBIC_CSR_MSGIN_W_ACK: 2406 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); /* Dunno what I'm ACKing */ 2407 printf("Acking unknown msgin CSR:%02x",csr); 2408 break; 2409 2410 case SBIC_CSR_XFERRED|MESG_OUT_PHASE: 2411 case SBIC_CSR_MIS|MESG_OUT_PHASE: 2412 case SBIC_CSR_MIS_1|MESG_OUT_PHASE: 2413 case SBIC_CSR_MIS_2|MESG_OUT_PHASE: 2414 #ifdef DEBUG 2415 if (sync_debug) 2416 printf ("sending REJECT msg to last msg.\n"); 2417 #endif 2418 2419 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2420 /* 2421 * should only get here on reject, 2422 * since it's always US that 2423 * initiate a sync transfer 2424 */ 2425 SEND_BYTE(regs, MSG_REJECT); 2426 WAIT_CIP(regs); 2427 if( asr & (SBIC_ASR_BSY|SBIC_ASR_LCI|SBIC_ASR_CIP) ) 2428 printf("next: REJECT sent asr %02x\n", asr); 2429 SBIC_TRACE(dev); 2430 return SBIC_STATE_RUNNING; 2431 2432 case SBIC_CSR_DISC: 2433 case SBIC_CSR_DISC_1: 2434 dev->sc_flags &= ~(SBICF_INDMA|SBICF_SELECTED); 2435 2436 /* Try to schedule another target */ 2437 #ifdef DEBUG 2438 if(reselect_debug>1) 2439 printf("sbicnext target %d disconnected\n", dev->target); 2440 #endif 2441 TAILQ_INSERT_HEAD(&dev->nexus_list, acb, chain); 2442 ++dev->sc_tinfo[dev->target].dconns; 2443 dev->sc_nexus = NULL; 2444 dev->sc_xs = NULL; 2445 2446 if( acb->xs->xs_control & XS_CTL_POLL 2447 || (dev->sc_flags & SBICF_ICMD) 2448 || !sbic_parallel_operations ) { 2449 SBIC_TRACE(dev); 2450 return SBIC_STATE_DISCONNECT; 2451 } 2452 sbic_sched(dev); 2453 SBIC_TRACE(dev); 2454 return SBIC_STATE_DISCONNECT; 2455 2456 case SBIC_CSR_RSLT_NI: 2457 case SBIC_CSR_RSLT_IFY: 2458 GET_SBIC_rselid(regs, newtarget); 2459 /* check SBIC_RID_SIV? */ 2460 newtarget &= SBIC_RID_MASK; 2461 if (csr == SBIC_CSR_RSLT_IFY) { 2462 /* Read IFY msg to avoid lockup */ 2463 GET_SBIC_data(regs, newlun); 2464 WAIT_CIP(regs); 2465 newlun &= SBIC_TLUN_MASK; 2466 CSR_TRACE('r',csr,asr,newtarget); 2467 } else { 2468 /* Need to get IFY message */ 2469 for (newlun = 256; newlun; --newlun) { 2470 GET_SBIC_asr(regs, asr); 2471 if (asr & SBIC_ASR_INT) 2472 break; 2473 delay(1); 2474 } 2475 newlun = 0; /* XXXX */ 2476 if ((asr & SBIC_ASR_INT) == 0) { 2477 #ifdef DEBUG 2478 if (reselect_debug) 2479 printf("RSLT_NI - no IFFY message? asr %x\n", asr); 2480 #endif 2481 } else { 2482 GET_SBIC_csr(regs,csr); 2483 CSR_TRACE('n',csr,asr,newtarget); 2484 if (csr == (SBIC_CSR_MIS | MESG_IN_PHASE) || 2485 csr == (SBIC_CSR_MIS_1 | MESG_IN_PHASE) || 2486 csr == (SBIC_CSR_MIS_2 | MESG_IN_PHASE)) { 2487 sbicmsgin(dev); 2488 newlun = dev->sc_msg[0] & 7; 2489 } else { 2490 printf("RSLT_NI - not MESG_IN_PHASE %x\n", 2491 csr); 2492 } 2493 } 2494 } 2495 #ifdef DEBUG 2496 if(reselect_debug>1 || (reselect_debug && csr==SBIC_CSR_RSLT_NI)) 2497 printf("sbicnext: reselect %s from targ %d lun %d\n", 2498 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY", 2499 newtarget, newlun); 2500 #endif 2501 if (dev->sc_nexus) { 2502 #ifdef DEBUG 2503 if (reselect_debug > 1) 2504 printf("%s: reselect %s with active command\n", 2505 dev->sc_dev.dv_xname, 2506 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY"); 2507 #ifdef DDB 2508 /* Debugger();*/ 2509 #endif 2510 #endif 2511 TAILQ_INSERT_HEAD(&dev->ready_list, dev->sc_nexus, chain); 2512 dev->sc_tinfo[dev->target].lubusy &= ~(1 << dev->lun); 2513 dev->sc_nexus = NULL; 2514 dev->sc_xs = NULL; 2515 } 2516 /* Reload sync values for this target */ 2517 if (dev->sc_sync[newtarget].state == SYNC_DONE) 2518 SET_SBIC_syn(regs, SBIC_SYN (dev->sc_sync[newtarget].offset, 2519 dev->sc_sync[newtarget].period)); 2520 else 2521 SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period)); 2522 for (acb = dev->nexus_list.tqh_first; acb; 2523 acb = acb->chain.tqe_next) { 2524 if (acb->xs->sc_link->scsipi_scsi.target != newtarget || 2525 acb->xs->sc_link->scsipi_scsi.lun != newlun) 2526 continue; 2527 TAILQ_REMOVE(&dev->nexus_list, acb, chain); 2528 dev->sc_nexus = acb; 2529 dev->sc_xs = acb->xs; 2530 dev->sc_flags |= SBICF_SELECTED; 2531 dev->target = newtarget; 2532 dev->lun = newlun; 2533 break; 2534 } 2535 if (acb == NULL) { 2536 printf("%s: reselect %s targ %d not in nexus_list %p\n", 2537 dev->sc_dev.dv_xname, 2538 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY", newtarget, 2539 &dev->nexus_list.tqh_first); 2540 panic("bad reselect in sbic"); 2541 } 2542 if (csr == SBIC_CSR_RSLT_IFY) 2543 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2544 break; 2545 2546 default: 2547 abort: 2548 /* 2549 * Something unexpected happened -- deal with it. 2550 */ 2551 printf("sbicnextstate: aborting csr %02x asr %02x\n", csr, asr); 2552 #ifdef DDB 2553 Debugger(); 2554 #endif 2555 #ifdef DEBUG 2556 if( data_pointer_debug > 1 ) 2557 printf("next dmastop: %d(%p:%lx)\n", 2558 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2559 dev->sc_dmatimo = 0; 2560 #endif 2561 dev->sc_dmastop(dev); 2562 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 2563 sbicerror(dev, regs, csr); 2564 sbicabort(dev, regs, "next"); 2565 if (dev->sc_flags & SBICF_INDMA) { 2566 /* 2567 * check for overlapping cache line, flush if so 2568 */ 2569 #if defined(M68040) || defined(M68060) 2570 if (dev->sc_flags & SBICF_DCFLUSH) { 2571 #if 0 2572 printf("sbic: 68040/060 DMA cache flush needs" 2573 "fixing? %x:%x\n", 2574 dev->sc_xs->data, dev->sc_xs->datalen); 2575 #endif 2576 } 2577 #endif 2578 dev->sc_flags &= 2579 ~(SBICF_INDMA | SBICF_DCFLUSH); 2580 #ifdef DEBUG 2581 if( data_pointer_debug > 1 ) 2582 printf("next dmastop: %d(%p:%lx)\n", 2583 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2584 dev->sc_dmatimo = 0; 2585 #endif 2586 dev->sc_dmastop(dev); 2587 sbic_scsidone(acb, -1); 2588 } 2589 SBIC_TRACE(dev); 2590 return SBIC_STATE_ERROR; 2591 } 2592 2593 SBIC_TRACE(dev); 2594 return(SBIC_STATE_RUNNING); 2595 } 2596 2597 2598 /* 2599 * Check if DMA can not be used with specified buffer 2600 */ 2601 2602 int 2603 sbiccheckdmap(bp, len, mask) 2604 void *bp; 2605 u_long len, mask; 2606 { 2607 u_char *buffer; 2608 u_long phy_buf; 2609 u_long phy_len; 2610 2611 buffer = bp; 2612 2613 if (len == 0) 2614 return(0); 2615 2616 while (len) { 2617 phy_buf = kvtop(buffer); 2618 if (len < (phy_len = NBPG - ((int) buffer & PGOFSET))) 2619 phy_len = len; 2620 if (phy_buf & mask) 2621 return(1); 2622 buffer += phy_len; 2623 len -= phy_len; 2624 } 2625 return(0); 2626 } 2627 2628 int 2629 sbictoscsiperiod(dev, regs, a) 2630 struct sbic_softc *dev; 2631 sbic_regmap_t regs; 2632 int a; 2633 { 2634 unsigned int fs; 2635 2636 /* 2637 * cycle = DIV / (2*CLK) 2638 * DIV = FS+2 2639 * best we can do is 200ns at 20Mhz, 2 cycles 2640 */ 2641 2642 GET_SBIC_myid(regs,fs); 2643 fs = (fs >>6) + 2; /* DIV */ 2644 fs = (fs * 10000) / (dev->sc_clkfreq<<1); /* Cycle, in ns */ 2645 if (a < 2) a = 8; /* map to Cycles */ 2646 return ((fs*a)>>2); /* in 4 ns units */ 2647 } 2648 2649 int 2650 sbicfromscsiperiod(dev, regs, p) 2651 struct sbic_softc *dev; 2652 sbic_regmap_t regs; 2653 int p; 2654 { 2655 register unsigned int fs, ret; 2656 2657 /* Just the inverse of the above */ 2658 2659 GET_SBIC_myid(regs,fs); 2660 fs = (fs >>6) + 2; /* DIV */ 2661 fs = (fs * 10000) / (dev->sc_clkfreq<<1); /* Cycle, in ns */ 2662 2663 ret = p << 2; /* in ns units */ 2664 ret = ret / fs; /* in Cycles */ 2665 if (ret < sbic_min_period) 2666 return(sbic_min_period); 2667 2668 /* verify rounding */ 2669 if (sbictoscsiperiod(dev, regs, ret) < p) 2670 ret++; 2671 return (ret >= 8) ? 0 : ret; 2672 } 2673 2674 #ifdef DEBUG 2675 2676 void 2677 sbicdumpstate() 2678 { 2679 u_char csr, asr; 2680 2681 GET_SBIC_asr(debug_sbic_regs,asr); 2682 GET_SBIC_csr(debug_sbic_regs,csr); 2683 printf("%s: asr:csr(%02x:%02x)->(%02x:%02x)\n", 2684 (routine==1)?"sbicgo": 2685 (routine==2)?"sbicintr": 2686 (routine==3)?"sbicicmd": 2687 (routine==4)?"sbicnext":"unknown", 2688 debug_asr, debug_csr, asr, csr); 2689 2690 } 2691 2692 void 2693 sbictimeout(dev) 2694 struct sbic_softc *dev; 2695 { 2696 int s, asr; 2697 2698 s = splbio(); 2699 if (dev->sc_dmatimo) { 2700 if (dev->sc_dmatimo > 1) { 2701 printf("%s: dma timeout #%d\n", 2702 dev->sc_dev.dv_xname, dev->sc_dmatimo - 1); 2703 GET_SBIC_asr(dev->sc_sbic, asr); 2704 if( asr & SBIC_ASR_INT ) { 2705 /* We need to service a missed IRQ */ 2706 printf("Servicing a missed int:(%02x,%02x)->(%02x,??)\n", 2707 debug_asr, debug_csr, asr); 2708 sbicintr(dev); 2709 } 2710 sbicdumpstate(); 2711 } 2712 dev->sc_dmatimo++; 2713 } 2714 splx(s); 2715 timeout((void *)sbictimeout, dev, 30 * hz); 2716 } 2717 2718 void 2719 sbic_dump_acb(acb) 2720 struct sbic_acb *acb; 2721 { 2722 u_char *b = (u_char *) &acb->cmd; 2723 int i; 2724 2725 printf("acb@%p ", acb); 2726 if (acb->xs == NULL) { 2727 printf("<unused>\n"); 2728 return; 2729 } 2730 printf("(%d:%d) flags %2x clen %2d cmd ", 2731 acb->xs->sc_link->scsipi_scsi.target, 2732 acb->xs->sc_link->scsipi_scsi.lun, acb->flags, acb->clen); 2733 for (i = acb->clen; i; --i) 2734 printf(" %02x", *b++); 2735 printf("\n"); 2736 printf(" xs: %8p data %8p:%04x ", acb->xs, acb->xs->data, 2737 acb->xs->datalen); 2738 printf("va %8p:%04x ", acb->sc_kv.dc_addr, acb->sc_kv.dc_count); 2739 printf("pa %8p:%04x tcnt %lx\n", acb->sc_pa.dc_addr, acb->sc_pa.dc_count, 2740 acb->sc_tcnt); 2741 } 2742 2743 void 2744 sbic_dump(dev) 2745 struct sbic_softc *dev; 2746 { 2747 sbic_regmap_t regs; 2748 u_char csr, asr; 2749 struct sbic_acb *acb; 2750 int s; 2751 int i; 2752 2753 s = splbio(); 2754 regs = dev->sc_sbic; 2755 #if CSR_TRACE_SIZE 2756 printf("csr trace: "); 2757 i = csr_traceptr; 2758 do { 2759 printf("%c%02x%02x%02x ", csr_trace[i].whr, 2760 csr_trace[i].csr, csr_trace[i].asr, csr_trace[i].xtn); 2761 switch(csr_trace[i].whr) { 2762 case 'g': 2763 printf("go "); break; 2764 case 's': 2765 printf("select "); break; 2766 case 'y': 2767 printf("select+ "); break; 2768 case 'i': 2769 printf("intr "); break; 2770 case 'f': 2771 printf("finish "); break; 2772 case '>': 2773 printf("out "); break; 2774 case '<': 2775 printf("in "); break; 2776 case 'm': 2777 printf("msgin "); break; 2778 case 'x': 2779 printf("msginx "); break; 2780 case 'X': 2781 printf("msginX "); break; 2782 case 'r': 2783 printf("reselect "); break; 2784 case 'I': 2785 printf("icmd "); break; 2786 case 'a': 2787 printf("abort "); break; 2788 default: 2789 printf("? "); 2790 } 2791 switch(csr_trace[i].csr) { 2792 case 0x11: 2793 printf("INITIATOR"); break; 2794 case 0x16: 2795 printf("S_XFERRED"); break; 2796 case 0x20: 2797 printf("MSGIN_ACK"); break; 2798 case 0x41: 2799 printf("DISC"); break; 2800 case 0x42: 2801 printf("SEL_TIMEO"); break; 2802 case 0x80: 2803 printf("RSLT_NI"); break; 2804 case 0x81: 2805 printf("RSLT_IFY"); break; 2806 case 0x85: 2807 printf("DISC_1"); break; 2808 case 0x18: case 0x19: case 0x1a: 2809 case 0x1b: case 0x1e: case 0x1f: 2810 case 0x28: case 0x29: case 0x2a: 2811 case 0x2b: case 0x2e: case 0x2f: 2812 case 0x48: case 0x49: case 0x4a: 2813 case 0x4b: case 0x4e: case 0x4f: 2814 case 0x88: case 0x89: case 0x8a: 2815 case 0x8b: case 0x8e: case 0x8f: 2816 switch(csr_trace[i].csr & 0xf0) { 2817 case 0x10: 2818 printf("DONE_"); break; 2819 case 0x20: 2820 printf("STOP_"); break; 2821 case 0x40: 2822 printf("ERR_"); break; 2823 case 0x80: 2824 printf("REQ_"); break; 2825 } 2826 switch(csr_trace[i].csr & 7) { 2827 case 0: 2828 printf("DATA_OUT"); break; 2829 case 1: 2830 printf("DATA_IN"); break; 2831 case 2: 2832 printf("CMD"); break; 2833 case 3: 2834 printf("STATUS"); break; 2835 case 6: 2836 printf("MSG_OUT"); break; 2837 case 7: 2838 printf("MSG_IN"); break; 2839 default: 2840 printf("invld phs"); 2841 } 2842 break; 2843 default: printf("****"); break; 2844 } 2845 if (csr_trace[i].asr & SBIC_ASR_INT) 2846 printf(" ASR_INT"); 2847 if (csr_trace[i].asr & SBIC_ASR_LCI) 2848 printf(" ASR_LCI"); 2849 if (csr_trace[i].asr & SBIC_ASR_BSY) 2850 printf(" ASR_BSY"); 2851 if (csr_trace[i].asr & SBIC_ASR_CIP) 2852 printf(" ASR_CIP"); 2853 printf("\n"); 2854 i = (i + 1) & (CSR_TRACE_SIZE - 1); 2855 } while (i != csr_traceptr); 2856 #endif 2857 GET_SBIC_asr(regs, asr); 2858 if ((asr & SBIC_ASR_INT) == 0) 2859 GET_SBIC_csr(regs, csr); 2860 else 2861 csr = 0; 2862 printf("%s@%p regs %p/%p asr %x csr %x\n", dev->sc_dev.dv_xname, 2863 dev, regs.sbic_asr_p, regs.sbic_value_p, asr, csr); 2864 if ((acb = dev->free_list.tqh_first)) { 2865 printf("Free list:\n"); 2866 while (acb) { 2867 sbic_dump_acb(acb); 2868 acb = acb->chain.tqe_next; 2869 } 2870 } 2871 if ((acb = dev->ready_list.tqh_first)) { 2872 printf("Ready list:\n"); 2873 while (acb) { 2874 sbic_dump_acb(acb); 2875 acb = acb->chain.tqe_next; 2876 } 2877 } 2878 if ((acb = dev->nexus_list.tqh_first)) { 2879 printf("Nexus list:\n"); 2880 while (acb) { 2881 sbic_dump_acb(acb); 2882 acb = acb->chain.tqe_next; 2883 } 2884 } 2885 if (dev->sc_nexus) { 2886 printf("nexus:\n"); 2887 sbic_dump_acb(dev->sc_nexus); 2888 } 2889 printf("sc_xs %p targ %d lun %d flags %x tcnt %lx dmacmd %x mask %lx\n", 2890 dev->sc_xs, dev->target, dev->lun, dev->sc_flags, dev->sc_tcnt, 2891 dev->sc_dmacmd, dev->sc_dmamask); 2892 for (i = 0; i < 8; ++i) { 2893 if (dev->sc_tinfo[i].cmds > 2) { 2894 printf("tgt %d: cmds %d disc %d senses %d lubusy %x\n", 2895 i, dev->sc_tinfo[i].cmds, 2896 dev->sc_tinfo[i].dconns, 2897 dev->sc_tinfo[i].senses, 2898 dev->sc_tinfo[i].lubusy); 2899 } 2900 } 2901 splx(s); 2902 } 2903 2904 #endif 2905
Indexes created Thu Oct 02 14:10:14 GMT 2025