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sys/arch/amiga/dev/sbic.c
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1 /* $NetBSD: sbic.c,v 1.75 2016/03/09 20:11:41 christos 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 1.75 2016/03/09 20:11:41 christos 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 u_int i; 802 struct sbic_acb *acb; 803 u_int inhibit_sync; 804 805 extern u_long scsi_nosync; 806 extern int shift_nosync; 807 808 if ((dev->sc_flags & SBICF_ALIVE) == 0) { 809 TAILQ_INIT(&dev->ready_list); 810 TAILQ_INIT(&dev->nexus_list); 811 TAILQ_INIT(&dev->free_list); 812 callout_init(&dev->sc_timo_ch, 0); 813 dev->sc_nexus = NULL; 814 dev->sc_xs = NULL; 815 acb = dev->sc_acb; 816 memset(acb, 0, sizeof(dev->sc_acb)); 817 for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) { 818 TAILQ_INSERT_TAIL(&dev->free_list, acb, chain); 819 acb++; 820 } 821 memset(dev->sc_tinfo, 0, sizeof(dev->sc_tinfo)); 822 #ifdef DEBUG 823 /* make sure timeout is really not needed */ 824 callout_reset(&dev->sc_timo_ch, 30 * hz, 825 (void *)sbictimeout, dev); 826 #endif 827 828 } else panic("sbic: reinitializing driver!"); 829 830 dev->sc_flags |= SBICF_ALIVE; 831 dev->sc_flags &= ~SBICF_SELECTED; 832 833 /* initialize inhibit array */ 834 if (scsi_nosync) { 835 inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff; 836 shift_nosync += 8; 837 #ifdef DEBUG 838 if (inhibit_sync) 839 printf("%s: Inhibiting synchronous transfer %02x\n", 840 device_xname(dev->sc_dev), inhibit_sync); 841 #endif 842 for (i = 0; i < 8; ++i) 843 if (inhibit_sync & (1 << i)) 844 sbic_inhibit_sync[i] = 1; 845 } 846 847 sbicreset(dev); 848 } 849 850 void 851 sbicreset(struct sbic_softc *dev) 852 { 853 sbic_regmap_t regs; 854 u_int my_id, s; 855 u_char csr; 856 #if 0 857 u_int i; 858 struct sbic_acb *acb; 859 #endif 860 861 regs = dev->sc_sbic; 862 #if 0 863 if (dev->sc_flags & SBICF_ALIVE) { 864 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 865 WAIT_CIP(regs); 866 } 867 #else 868 SET_SBIC_cmd(regs, SBIC_CMD_ABORT); 869 WAIT_CIP(regs); 870 #endif 871 s = splbio(); 872 my_id = dev->sc_channel.chan_id & SBIC_ID_MASK; 873 874 /* Enable advanced mode */ 875 my_id |= SBIC_ID_EAF /*| SBIC_ID_EHP*/ ; 876 SET_SBIC_myid(regs, my_id); 877 878 /* 879 * Disable interrupts (in dmainit) then reset the chip 880 */ 881 SET_SBIC_cmd(regs, SBIC_CMD_RESET); 882 DELAY(25); 883 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 884 GET_SBIC_csr(regs, csr); /* clears interrupt also */ 885 __USE(csr); 886 887 if (dev->sc_clkfreq < 110) 888 my_id |= SBIC_ID_FS_8_10; 889 else if (dev->sc_clkfreq < 160) 890 my_id |= SBIC_ID_FS_12_15; 891 else if (dev->sc_clkfreq < 210) 892 my_id |= SBIC_ID_FS_16_20; 893 894 SET_SBIC_myid(regs, my_id); 895 896 /* 897 * Set up various chip parameters 898 */ 899 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /* | SBIC_CTL_HSP */ 900 | SBIC_MACHINE_DMA_MODE); 901 /* 902 * don't allow (re)selection (SBIC_RID_ES) 903 * until we can handle target mode!! 904 */ 905 SET_SBIC_rselid(regs, SBIC_RID_ER); 906 SET_SBIC_syn(regs, 0); /* asynch for now */ 907 908 /* 909 * anything else was zeroed by reset 910 */ 911 splx(s); 912 913 #if 0 914 if ((dev->sc_flags & SBICF_ALIVE) == 0) { 915 TAILQ_INIT(&dev->ready_list); 916 TAILQ_INIT(&dev->nexus_list); 917 TAILQ_INIT(&dev->free_list); 918 dev->sc_nexus = NULL; 919 dev->sc_xs = NULL; 920 acb = dev->sc_acb; 921 memset(acb, 0, sizeof(dev->sc_acb)); 922 for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) { 923 TAILQ_INSERT_TAIL(&dev->free_list, acb, chain); 924 acb++; 925 } 926 memset(dev->sc_tinfo, 0, sizeof(dev->sc_tinfo)); 927 } else { 928 if (dev->sc_nexus != NULL) { 929 dev->sc_nexus->xs->error = XS_DRIVER_STUFFUP; 930 sbic_scsidone(dev->sc_nexus, dev->sc_stat[0]); 931 } 932 while (acb = dev->nexus_list.tqh_first) { 933 acb->xs->error = XS_DRIVER_STUFFUP; 934 sbic_scsidone(acb, -1 /*acb->stat[0]*/); 935 } 936 } 937 938 dev->sc_flags |= SBICF_ALIVE; 939 #endif 940 dev->sc_flags &= ~SBICF_SELECTED; 941 } 942 943 void 944 sbicerror(struct sbic_softc *dev, sbic_regmap_t regs, u_char csr) 945 { 946 struct scsipi_xfer *xs; 947 948 xs = dev->sc_xs; 949 950 #ifdef DIAGNOSTIC 951 if (xs == NULL) 952 panic("sbicerror"); 953 #endif 954 if (xs->xs_control & XS_CTL_SILENT) 955 return; 956 957 printf("%s: ", device_xname(dev->sc_dev)); 958 printf("csr == 0x%02x\n", csr); /* XXX */ 959 } 960 961 /* 962 * select the bus, return when selected or error. 963 */ 964 int 965 sbicselectbus(struct sbic_softc *dev, sbic_regmap_t regs, u_char target, 966 u_char lun, u_char our_addr) 967 { 968 u_char asr, csr, id; 969 970 SBIC_TRACE(dev); 971 QPRINTF(("sbicselectbus %d\n", target)); 972 973 /* 974 * if we're already selected, return (XXXX panic maybe?) 975 */ 976 if (dev->sc_flags & SBICF_SELECTED) { 977 SBIC_TRACE(dev); 978 return(1); 979 } 980 981 /* 982 * issue select 983 */ 984 SBIC_TC_PUT(regs, 0); 985 SET_SBIC_selid(regs, target); 986 SET_SBIC_timeo(regs, SBIC_TIMEOUT(250,dev->sc_clkfreq)); 987 988 /* 989 * set sync or async 990 */ 991 if (dev->sc_sync[target].state == SYNC_DONE) 992 SET_SBIC_syn(regs, SBIC_SYN (dev->sc_sync[target].offset, 993 dev->sc_sync[target].period)); 994 else 995 SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period)); 996 997 GET_SBIC_asr(regs, asr); 998 if (asr & (SBIC_ASR_INT|SBIC_ASR_BSY)) { 999 /* This means we got ourselves reselected upon */ 1000 /* printf("sbicselectbus: INT/BSY asr %02x\n", asr);*/ 1001 #ifdef DDB 1002 /* Debugger();*/ 1003 #endif 1004 SBIC_TRACE(dev); 1005 return 1; 1006 } 1007 1008 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN); 1009 1010 /* 1011 * wait for select (merged from separate function may need 1012 * cleanup) 1013 */ 1014 WAIT_CIP(regs); 1015 do { 1016 asr = SBIC_WAIT(regs, SBIC_ASR_INT | SBIC_ASR_LCI, 0); 1017 if (asr & SBIC_ASR_LCI) { 1018 #ifdef DEBUG 1019 if (reselect_debug) 1020 printf("sbicselectbus: late LCI asr %02x\n", asr); 1021 #endif 1022 SBIC_TRACE(dev); 1023 return 1; 1024 } 1025 GET_SBIC_csr (regs, csr); 1026 CSR_TRACE('s',csr,asr,target); 1027 QPRINTF(("%02x ", csr)); 1028 if (csr == SBIC_CSR_RSLT_NI || csr == SBIC_CSR_RSLT_IFY) { 1029 #ifdef DEBUG 1030 if (reselect_debug) 1031 printf("sbicselectbus: reselected asr %02x\n", asr); 1032 #endif 1033 /* We need to handle this now so we don't lock up later */ 1034 sbicnextstate(dev, csr, asr); 1035 SBIC_TRACE(dev); 1036 return 1; 1037 } 1038 if (csr == SBIC_CSR_SLT || csr == SBIC_CSR_SLT_ATN) { 1039 panic("sbicselectbus: target issued select!"); 1040 return 1; 1041 } 1042 } while (csr != (SBIC_CSR_MIS_2|MESG_OUT_PHASE) 1043 && csr != (SBIC_CSR_MIS_2|CMD_PHASE) && csr != SBIC_CSR_SEL_TIMEO); 1044 1045 /* Enable (or not) reselection */ 1046 if (!sbic_enable_reselect && dev->nexus_list.tqh_first == NULL) 1047 SET_SBIC_rselid (regs, 0); 1048 else 1049 SET_SBIC_rselid (regs, SBIC_RID_ER); 1050 1051 if (csr == (SBIC_CSR_MIS_2|CMD_PHASE)) { 1052 dev->sc_flags |= SBICF_SELECTED; /* device ignored ATN */ 1053 GET_SBIC_selid(regs, id); 1054 dev->target = id; 1055 GET_SBIC_tlun(regs,dev->lun); 1056 if (dev->lun & SBIC_TLUN_VALID) 1057 dev->lun &= SBIC_TLUN_MASK; 1058 else 1059 dev->lun = lun; 1060 } else if (csr == (SBIC_CSR_MIS_2|MESG_OUT_PHASE)) { 1061 /* 1062 * Send identify message 1063 * (SCSI-2 requires an identify msg (?)) 1064 */ 1065 GET_SBIC_selid(regs, id); 1066 dev->target = id; 1067 GET_SBIC_tlun(regs,dev->lun); 1068 if (dev->lun & SBIC_TLUN_VALID) 1069 dev->lun &= SBIC_TLUN_MASK; 1070 else 1071 dev->lun = lun; 1072 /* 1073 * handle drives that don't want to be asked 1074 * whether to go sync at all. 1075 */ 1076 if (sbic_inhibit_sync[id] 1077 && dev->sc_sync[id].state == SYNC_START) { 1078 #ifdef DEBUG 1079 if (sync_debug) 1080 printf("Forcing target %d asynchronous.\n", id); 1081 #endif 1082 dev->sc_sync[id].offset = 0; 1083 dev->sc_sync[id].period = sbic_min_period; 1084 dev->sc_sync[id].state = SYNC_DONE; 1085 } 1086 1087 1088 if (dev->sc_sync[id].state != SYNC_START){ 1089 if (dev->sc_xs->xs_control & XS_CTL_POLL 1090 || (dev->sc_flags & SBICF_ICMD) 1091 || !sbic_enable_reselect) 1092 SEND_BYTE (regs, MSG_IDENTIFY | lun); 1093 else 1094 SEND_BYTE (regs, MSG_IDENTIFY_DR | lun); 1095 } else { 1096 /* 1097 * try to initiate a sync transfer. 1098 * So compose the sync message we're going 1099 * to send to the target 1100 */ 1101 1102 #ifdef DEBUG 1103 if (sync_debug) 1104 printf("Sending sync request to target %d ... ", 1105 id); 1106 #endif 1107 /* 1108 * setup scsi message sync message request 1109 */ 1110 dev->sc_msg[0] = MSG_IDENTIFY | lun; 1111 dev->sc_msg[1] = MSG_EXT_MESSAGE; 1112 dev->sc_msg[2] = 3; 1113 dev->sc_msg[3] = MSG_SYNC_REQ; 1114 dev->sc_msg[4] = sbictoscsiperiod(dev, regs, 1115 sbic_min_period); 1116 dev->sc_msg[5] = sbic_max_offset; 1117 1118 if (sbicxfstart(regs, 6, MESG_OUT_PHASE, sbic_cmd_wait)) 1119 sbicxfout(regs, 6, dev->sc_msg, MESG_OUT_PHASE); 1120 1121 dev->sc_sync[id].state = SYNC_SENT; 1122 #ifdef DEBUG 1123 if (sync_debug) 1124 printf ("sent\n"); 1125 #endif 1126 } 1127 1128 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 1129 GET_SBIC_csr (regs, csr); 1130 CSR_TRACE('y',csr,asr,target); 1131 QPRINTF(("[%02x]", csr)); 1132 #ifdef DEBUG 1133 if (sync_debug && dev->sc_sync[id].state == SYNC_SENT) 1134 printf("csr-result of last msgout: 0x%x\n", csr); 1135 #endif 1136 1137 if (csr != SBIC_CSR_SEL_TIMEO) 1138 dev->sc_flags |= SBICF_SELECTED; 1139 } 1140 if (csr == SBIC_CSR_SEL_TIMEO) 1141 dev->sc_xs->error = XS_SELTIMEOUT; 1142 1143 QPRINTF(("\n")); 1144 1145 SBIC_TRACE(dev); 1146 return(csr == SBIC_CSR_SEL_TIMEO); 1147 } 1148 1149 int 1150 sbicxfstart(sbic_regmap_t regs, int len, u_char phase, int wait) 1151 { 1152 u_char id; 1153 1154 switch (phase) { 1155 case DATA_IN_PHASE: 1156 case MESG_IN_PHASE: 1157 GET_SBIC_selid (regs, id); 1158 id |= SBIC_SID_FROM_SCSI; 1159 SET_SBIC_selid (regs, id); 1160 SBIC_TC_PUT (regs, (unsigned)len); 1161 break; 1162 case DATA_OUT_PHASE: 1163 case MESG_OUT_PHASE: 1164 case CMD_PHASE: 1165 GET_SBIC_selid (regs, id); 1166 id &= ~SBIC_SID_FROM_SCSI; 1167 SET_SBIC_selid (regs, id); 1168 SBIC_TC_PUT (regs, (unsigned)len); 1169 break; 1170 default: 1171 SBIC_TC_PUT (regs, 0); 1172 } 1173 QPRINTF(("sbicxfstart %d, %d, %d\n", len, phase, wait)); 1174 1175 return(1); 1176 } 1177 1178 int 1179 sbicxfout(sbic_regmap_t regs, int len, void *bp, int phase) 1180 { 1181 u_char orig_csr, asr, *buf; 1182 int wait; 1183 1184 buf = bp; 1185 wait = sbic_data_wait; 1186 1187 QPRINTF(("sbicxfout {%d} %02x %02x %02x %02x %02x " 1188 "%02x %02x %02x %02x %02x\n", len, buf[0], buf[1], buf[2], 1189 buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9])); 1190 1191 GET_SBIC_csr (regs, orig_csr); 1192 __USE(orig_csr); 1193 CSR_TRACE('>',orig_csr,0,0); 1194 1195 /* 1196 * sigh.. WD-PROTO strikes again.. sending the command in one go 1197 * causes the chip to lock up if talking to certain (misbehaving?) 1198 * targets. Anyway, this procedure should work for all targets, but 1199 * it's slightly slower due to the overhead 1200 */ 1201 WAIT_CIP (regs); 1202 SET_SBIC_cmd (regs, SBIC_CMD_XFER_INFO); 1203 for (;len > 0; len--) { 1204 GET_SBIC_asr (regs, asr); 1205 while ((asr & SBIC_ASR_DBR) == 0) { 1206 if ((asr & SBIC_ASR_INT) || --wait < 0) { 1207 #ifdef DEBUG 1208 if (sbic_debug) 1209 printf("sbicxfout fail: l%d i%x w%d\n", 1210 len, asr, wait); 1211 #endif 1212 return (len); 1213 } 1214 /* DELAY(1);*/ 1215 GET_SBIC_asr (regs, asr); 1216 } 1217 1218 SET_SBIC_data (regs, *buf); 1219 buf++; 1220 } 1221 SBIC_TC_GET(regs, len); 1222 QPRINTF(("sbicxfout done %d bytes\n", len)); 1223 /* 1224 * this leaves with one csr to be read 1225 */ 1226 return(0); 1227 } 1228 1229 /* returns # bytes left to read */ 1230 int 1231 sbicxfin(sbic_regmap_t regs, int len, void *bp) 1232 { 1233 int wait; 1234 u_char orig_csr, csr, asr; 1235 u_char *buf; 1236 #ifdef DEBUG 1237 u_char *obp; 1238 #endif 1239 1240 wait = sbic_data_wait; 1241 buf = bp; 1242 #ifdef DEBUG 1243 obp = bp; 1244 #endif 1245 1246 GET_SBIC_csr (regs, orig_csr); 1247 __USE(orig_csr); 1248 CSR_TRACE('<',orig_csr,0,0); 1249 1250 QPRINTF(("sbicxfin %d, csr=%02x\n", len, orig_csr)); 1251 1252 WAIT_CIP (regs); 1253 SET_SBIC_cmd (regs, SBIC_CMD_XFER_INFO); 1254 for (;len > 0; len--) { 1255 GET_SBIC_asr (regs, asr); 1256 if ((asr & SBIC_ASR_PE)) { 1257 #ifdef DEBUG 1258 printf("sbicxfin parity error: l%d i%x w%d\n", 1259 len, asr, wait); 1260 /* return ((unsigned long)buf - (unsigned long)bp); */ 1261 #ifdef DDB 1262 Debugger(); 1263 #endif 1264 #endif 1265 } 1266 while ((asr & SBIC_ASR_DBR) == 0) { 1267 if ((asr & SBIC_ASR_INT) || --wait < 0) { 1268 #ifdef DEBUG 1269 if (sbic_debug) { 1270 QPRINTF(("sbicxfin fail:{%d} %02x %02x %02x %02x %02x %02x " 1271 "%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2], 1272 obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9])); 1273 printf("sbicxfin fail: l%d i%x w%d\n", 1274 len, asr, wait); 1275 } 1276 #endif 1277 return len; 1278 } 1279 1280 if (!(asr & SBIC_ASR_BSY)) { 1281 GET_SBIC_csr(regs, csr); 1282 __USE(csr); 1283 CSR_TRACE('<',csr,asr,len); 1284 QPRINTF(("[CSR%02xASR%02x]", csr, asr)); 1285 } 1286 1287 /* DELAY(1);*/ 1288 GET_SBIC_asr (regs, asr); 1289 } 1290 1291 GET_SBIC_data (regs, *buf); 1292 /* QPRINTF(("asr=%02x, csr=%02x, data=%02x\n", asr, csr, *buf));*/ 1293 buf++; 1294 } 1295 1296 QPRINTF(("sbicxfin {%d} %02x %02x %02x %02x %02x %02x " 1297 "%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2], 1298 obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9])); 1299 1300 /* this leaves with one csr to be read */ 1301 return len; 1302 } 1303 1304 /* 1305 * SCSI 'immediate' command: issue a command to some SCSI device 1306 * and get back an 'immediate' response (i.e., do programmed xfer 1307 * to get the response data). 'cbuf' is a buffer containing a scsi 1308 * command of length clen bytes. 'buf' is a buffer of length 'len' 1309 * bytes for data. The transfer direction is determined by the device 1310 * (i.e., by the scsi bus data xfer phase). If 'len' is zero, the 1311 * command must supply no data. 1312 */ 1313 int 1314 sbicicmd(struct sbic_softc *dev, int target, int lun, void *cbuf, int clen, 1315 void *buf, int len) 1316 { 1317 sbic_regmap_t regs; 1318 u_char phase, csr, asr; 1319 int wait, i; 1320 struct sbic_acb *acb; 1321 1322 #define CSR_LOG_BUF_SIZE 0 1323 #if CSR_LOG_BUF_SIZE 1324 int bufptr; 1325 int csrbuf[CSR_LOG_BUF_SIZE]; 1326 bufptr=0; 1327 #endif 1328 1329 SBIC_TRACE(dev); 1330 regs = dev->sc_sbic; 1331 acb = dev->sc_nexus; 1332 1333 /* Make sure pointers are OK */ 1334 dev->sc_last = dev->sc_cur = &acb->sc_pa; 1335 dev->sc_tcnt = acb->sc_tcnt = 0; 1336 acb->sc_pa.dc_count = 0; /* No DMA */ 1337 acb->sc_kv.dc_addr = buf; 1338 acb->sc_kv.dc_count = len; 1339 1340 #ifdef DEBUG 1341 routine = 3; 1342 debug_sbic_regs = regs; /* store this to allow debug calls */ 1343 if (data_pointer_debug > 1) 1344 printf("sbicicmd(%d,%d):%d\n", target, lun, 1345 acb->sc_kv.dc_count); 1346 #endif 1347 1348 /* 1349 * set the sbic into non-DMA mode 1350 */ 1351 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /*| SBIC_CTL_HSP*/); 1352 1353 dev->sc_stat[0] = 0xff; 1354 dev->sc_msg[0] = 0xff; 1355 i = 1; /* pre-load */ 1356 1357 /* We're stealing the SCSI bus */ 1358 dev->sc_flags |= SBICF_ICMD; 1359 1360 do { 1361 /* 1362 * select the SCSI bus (it's an error if bus isn't free) 1363 */ 1364 if (!(dev->sc_flags & SBICF_SELECTED) 1365 && sbicselectbus(dev, regs, target, lun, dev->sc_scsiaddr)) { 1366 /* printf("sbicicmd: trying to select busy bus!\n"); */ 1367 dev->sc_flags &= ~SBICF_ICMD; 1368 return(-1); 1369 } 1370 1371 /* 1372 * Wait for a phase change (or error) then let the device sequence 1373 * us through the various SCSI phases. 1374 */ 1375 1376 wait = sbic_cmd_wait; 1377 1378 GET_SBIC_asr (regs, asr); 1379 GET_SBIC_csr (regs, csr); 1380 CSR_TRACE('I',csr,asr,target); 1381 QPRINTF((">ASR:%02xCSR:%02x<", asr, csr)); 1382 1383 #if CSR_LOG_BUF_SIZE 1384 csrbuf[bufptr++] = csr; 1385 #endif 1386 1387 1388 switch (csr) { 1389 case SBIC_CSR_S_XFERRED: 1390 case SBIC_CSR_DISC: 1391 case SBIC_CSR_DISC_1: 1392 dev->sc_flags &= ~SBICF_SELECTED; 1393 GET_SBIC_cmd_phase (regs, phase); 1394 if (phase == 0x60) { 1395 GET_SBIC_tlun (regs, dev->sc_stat[0]); 1396 i = 0; /* done */ 1397 /* break; */ /* Bypass all the state gobldygook */ 1398 } else { 1399 #ifdef DEBUG 1400 if (reselect_debug>1) 1401 printf("sbicicmd: handling disconnect\n"); 1402 #endif 1403 i = SBIC_STATE_DISCONNECT; 1404 } 1405 break; 1406 1407 case SBIC_CSR_XFERRED|CMD_PHASE: 1408 case SBIC_CSR_MIS|CMD_PHASE: 1409 case SBIC_CSR_MIS_1|CMD_PHASE: 1410 case SBIC_CSR_MIS_2|CMD_PHASE: 1411 if (sbicxfstart(regs, clen, CMD_PHASE, sbic_cmd_wait)) 1412 if (sbicxfout(regs, clen, 1413 cbuf, CMD_PHASE)) 1414 i = sbicabort(dev, regs, "icmd sending cmd"); 1415 #if 0 1416 GET_SBIC_csr(regs, csr); /* Lets us reload tcount */ 1417 WAIT_CIP(regs); 1418 GET_SBIC_asr(regs, asr); 1419 CSR_TRACE('I',csr,asr,target); 1420 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI|SBIC_ASR_CIP)) 1421 printf("next: cmd sent asr %02x, csr %02x\n", 1422 asr, csr); 1423 #endif 1424 break; 1425 1426 #if 0 1427 case SBIC_CSR_XFERRED|DATA_OUT_PHASE: 1428 case SBIC_CSR_XFERRED|DATA_IN_PHASE: 1429 case SBIC_CSR_MIS|DATA_OUT_PHASE: 1430 case SBIC_CSR_MIS|DATA_IN_PHASE: 1431 case SBIC_CSR_MIS_1|DATA_OUT_PHASE: 1432 case SBIC_CSR_MIS_1|DATA_IN_PHASE: 1433 case SBIC_CSR_MIS_2|DATA_OUT_PHASE: 1434 case SBIC_CSR_MIS_2|DATA_IN_PHASE: 1435 if (acb->sc_kv.dc_count <= 0) 1436 i = sbicabort(dev, regs, "icmd out of data"); 1437 else { 1438 wait = sbic_data_wait; 1439 if (sbicxfstart(regs, 1440 acb->sc_kv.dc_count, 1441 SBIC_PHASE(csr), wait)) 1442 if (csr & 0x01) 1443 /* data in? */ 1444 i=sbicxfin(regs, 1445 acb->sc_kv.dc_count, 1446 acb->sc_kv.dc_addr); 1447 else 1448 i=sbicxfout(regs, 1449 acb->sc_kv.dc_count, 1450 acb->sc_kv.dc_addr, 1451 SBIC_PHASE(csr)); 1452 acb->sc_kv.dc_addr += 1453 (acb->sc_kv.dc_count - i); 1454 acb->sc_kv.dc_count = i; 1455 i = 1; 1456 } 1457 break; 1458 1459 #endif 1460 case SBIC_CSR_XFERRED|STATUS_PHASE: 1461 case SBIC_CSR_MIS|STATUS_PHASE: 1462 case SBIC_CSR_MIS_1|STATUS_PHASE: 1463 case SBIC_CSR_MIS_2|STATUS_PHASE: 1464 /* 1465 * the sbic does the status/cmd-complete reading ok, 1466 * so do this with its hi-level commands. 1467 */ 1468 #ifdef DEBUG 1469 if (sbic_debug) 1470 printf("SBICICMD status phase\n"); 1471 #endif 1472 SBIC_TC_PUT(regs, 0); 1473 SET_SBIC_cmd_phase(regs, 0x46); 1474 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER); 1475 break; 1476 1477 #if THIS_IS_A_RESERVED_STATE 1478 case BUS_FREE_PHASE: /* This is not legal */ 1479 if (dev->sc_stat[0] != 0xff) 1480 goto out; 1481 break; 1482 #endif 1483 1484 default: 1485 i = sbicnextstate(dev, csr, asr); 1486 } 1487 1488 /* 1489 * make sure the last command was taken, 1490 * ie. we're not hunting after an ignored command.. 1491 */ 1492 GET_SBIC_asr(regs, asr); 1493 1494 /* tapes may take a loooong time.. */ 1495 while (asr & SBIC_ASR_BSY){ 1496 if (asr & SBIC_ASR_DBR) { 1497 printf("sbicicmd: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", 1498 csr,asr); 1499 #ifdef DDB 1500 Debugger(); 1501 #endif 1502 /* SBIC is jammed */ 1503 /* DUNNO which direction */ 1504 /* Try old direction */ 1505 GET_SBIC_data(regs,i); 1506 GET_SBIC_asr(regs, asr); 1507 if (asr & SBIC_ASR_DBR) /* Wants us to write */ 1508 SET_SBIC_data(regs,i); 1509 } 1510 GET_SBIC_asr(regs, asr); 1511 } 1512 1513 /* 1514 * wait for last command to complete 1515 */ 1516 if (asr & SBIC_ASR_LCI) { 1517 printf("sbicicmd: last command ignored\n"); 1518 } 1519 else if (i == 1) /* Bsy */ 1520 SBIC_WAIT (regs, SBIC_ASR_INT, wait); 1521 1522 /* 1523 * do it again 1524 */ 1525 } while (i > 0 && dev->sc_stat[0] == 0xff); 1526 1527 /* Sometimes we need to do an extra read of the CSR */ 1528 GET_SBIC_csr(regs, csr); 1529 CSR_TRACE('I',csr,asr,0xff); 1530 1531 #if CSR_LOG_BUF_SIZE 1532 if (reselect_debug>1) 1533 for (i=0; i<bufptr; i++) 1534 printf("CSR:%02x", csrbuf[i]); 1535 #endif 1536 1537 #ifdef DEBUG 1538 if (data_pointer_debug > 1) 1539 printf("sbicicmd done(%d,%d):%d =%d=\n", 1540 dev->target, lun, 1541 acb->sc_kv.dc_count, 1542 dev->sc_stat[0]); 1543 #endif 1544 1545 QPRINTF(("=STS:%02x=", dev->sc_stat[0])); 1546 dev->sc_flags &= ~SBICF_ICMD; 1547 1548 SBIC_TRACE(dev); 1549 return(dev->sc_stat[0]); 1550 } 1551 1552 /* 1553 * Finish SCSI xfer command: After the completion interrupt from 1554 * a read/write operation, sequence through the final phases in 1555 * programmed i/o. This routine is a lot like sbicicmd except we 1556 * skip (and don't allow) the select, cmd out and data in/out phases. 1557 */ 1558 void 1559 sbicxfdone(struct sbic_softc *dev, sbic_regmap_t regs, int target) 1560 { 1561 u_char phase, asr, csr; 1562 int s; 1563 1564 SBIC_TRACE(dev); 1565 QPRINTF(("{")); 1566 s = splbio(); 1567 1568 /* 1569 * have the sbic complete on its own 1570 */ 1571 SBIC_TC_PUT(regs, 0); 1572 SET_SBIC_cmd_phase(regs, 0x46); 1573 SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER); 1574 1575 do { 1576 asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0); 1577 __USE(asr); 1578 GET_SBIC_csr (regs, csr); 1579 CSR_TRACE('f',csr,asr,target); 1580 QPRINTF(("%02x:", csr)); 1581 } while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) 1582 && (csr != SBIC_CSR_S_XFERRED)); 1583 1584 dev->sc_flags &= ~SBICF_SELECTED; 1585 1586 GET_SBIC_cmd_phase (regs, phase); 1587 QPRINTF(("}%02x", phase)); 1588 if (phase == 0x60) 1589 GET_SBIC_tlun(regs, dev->sc_stat[0]); 1590 else 1591 sbicerror(dev, regs, csr); 1592 1593 QPRINTF(("=STS:%02x=\n", dev->sc_stat[0])); 1594 splx(s); 1595 SBIC_TRACE(dev); 1596 } 1597 1598 /* 1599 * No DMA chains 1600 */ 1601 1602 int 1603 sbicgo(struct sbic_softc *dev, struct scsipi_xfer *xs) 1604 { 1605 int i, dmaflags, count, usedma; 1606 u_char csr, asr, *addr; 1607 sbic_regmap_t regs; 1608 struct sbic_acb *acb; 1609 1610 SBIC_TRACE(dev); 1611 dev->target = xs->xs_periph->periph_target; 1612 dev->lun = xs->xs_periph->periph_lun; 1613 acb = dev->sc_nexus; 1614 regs = dev->sc_sbic; 1615 1616 usedma = sbicdmaok(dev, xs); 1617 #ifdef DEBUG 1618 routine = 1; 1619 debug_sbic_regs = regs; /* store this to allow debug calls */ 1620 if (data_pointer_debug > 1) 1621 printf("sbicgo(%d,%d)\n", dev->target, dev->lun); 1622 #endif 1623 1624 /* 1625 * set the sbic into DMA mode 1626 */ 1627 if (usedma) 1628 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI | 1629 SBIC_MACHINE_DMA_MODE); 1630 else 1631 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 1632 1633 1634 /* 1635 * select the SCSI bus (it's an error if bus isn't free) 1636 */ 1637 if (sbicselectbus(dev, regs, dev->target, dev->lun, 1638 dev->sc_scsiaddr)) { 1639 /* printf("sbicgo: Trying to select busy bus!\n"); */ 1640 SBIC_TRACE(dev); 1641 return(0); /* Not done: needs to be rescheduled */ 1642 } 1643 dev->sc_stat[0] = 0xff; 1644 1645 /* 1646 * Calculate DMA chains now 1647 */ 1648 1649 dmaflags = 0; 1650 if (acb->flags & ACB_DATAIN) 1651 dmaflags |= DMAGO_READ; 1652 1653 1654 /* 1655 * Deal w/bounce buffers. 1656 */ 1657 1658 addr = acb->sc_kv.dc_addr; 1659 count = acb->sc_kv.dc_count; 1660 if (count && (char *)kvtop(addr) != acb->sc_pa.dc_addr) { /* XXXX check */ 1661 printf("sbic: DMA buffer mapping changed %p->%x\n", 1662 acb->sc_pa.dc_addr, (unsigned)kvtop(addr)); 1663 #ifdef DDB 1664 Debugger(); 1665 #endif 1666 } 1667 1668 #ifdef DEBUG 1669 ++sbicdma_ops; /* count total DMA operations */ 1670 #endif 1671 if (count && usedma && dev->sc_flags & SBICF_BADDMA && 1672 sbiccheckdmap(addr, count, dev->sc_dmamask)) { 1673 /* 1674 * need to bounce the DMA. 1675 */ 1676 if (dmaflags & DMAGO_READ) { 1677 acb->flags |= ACB_BBUF; 1678 acb->sc_dmausrbuf = addr; 1679 acb->sc_dmausrlen = count; 1680 acb->sc_usrbufpa = (u_char *)kvtop(addr); 1681 if (!dev->sc_tinfo[dev->target].bounce) { 1682 printf("sbicgo: HELP! no bounce allocated for %d\n", 1683 dev->target); 1684 printf("xfer: (%p->%p,%lx)\n", acb->sc_dmausrbuf, 1685 acb->sc_usrbufpa, acb->sc_dmausrlen); 1686 dev->sc_tinfo[xs->xs_periph->periph_target].bounce 1687 = (char *)alloc_z2mem(MAXPHYS); 1688 if (isztwomem(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)) 1689 printf("alloc ZII target %d bounce pa 0x%x\n", 1690 xs->xs_periph->periph_target, 1691 (unsigned)kvtop(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)); 1692 else if (dev->sc_tinfo[xs->xs_periph->periph_target].bounce) 1693 printf("alloc CHIP target %d bounce pa %p\n", 1694 xs->xs_periph->periph_target, 1695 PREP_DMA_MEM(dev->sc_tinfo[xs->xs_periph->periph_target].bounce)); 1696 1697 printf("Allocating %d bounce at %x\n", 1698 dev->target, 1699 (unsigned)kvtop(dev->sc_tinfo[dev->target].bounce)); 1700 } 1701 } else { /* write: copy to DMA buffer */ 1702 #ifdef DEBUG 1703 if (data_pointer_debug) 1704 printf("sbicgo: copying %x bytes to target %d bounce %x\n", 1705 count, dev->target, 1706 (unsigned)kvtop(dev->sc_tinfo[dev->target].bounce)); 1707 #endif 1708 bcopy (addr, dev->sc_tinfo[dev->target].bounce, count); 1709 } 1710 addr = dev->sc_tinfo[dev->target].bounce;/* and use DMA buffer */ 1711 acb->sc_kv.dc_addr = addr; 1712 #ifdef DEBUG 1713 ++sbicdma_bounces; /* count number of bounced */ 1714 #endif 1715 } 1716 1717 /* 1718 * Allocate the DMA chain 1719 */ 1720 1721 /* Set start KVM addresses */ 1722 #if 0 1723 acb->sc_kv.dc_addr = addr; 1724 acb->sc_kv.dc_count = count; 1725 #endif 1726 1727 /* Mark end of segment */ 1728 acb->sc_tcnt = dev->sc_tcnt = 0; 1729 acb->sc_pa.dc_count = 0; 1730 1731 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 1732 SBIC_TRACE(dev); 1733 /* Enable interrupts but don't do any DMA */ 1734 dev->sc_enintr(dev); 1735 if (usedma) { 1736 dev->sc_tcnt = dev->sc_dmago(dev, acb->sc_pa.dc_addr, 1737 acb->sc_pa.dc_count, 1738 dmaflags); 1739 #ifdef DEBUG 1740 dev->sc_dmatimo = dev->sc_tcnt ? 1 : 0; 1741 #endif 1742 } else 1743 dev->sc_dmacmd = 0; /* Don't use DMA */ 1744 dev->sc_flags |= SBICF_INDMA; 1745 /* SBIC_TC_PUT(regs, dev->sc_tcnt); */ /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */ 1746 SBIC_TRACE(dev); 1747 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 1748 1749 /* 1750 * push the data cache (I think this won't work (EH)) 1751 */ 1752 #if defined(M68040) || defined(M68060) 1753 if (mmutype == MMU_68040 && usedma && count) { 1754 dma_cachectl(addr, count); 1755 if (((u_int)addr & 0xF) || (((u_int)addr + count) & 0xF)) 1756 dev->sc_flags |= SBICF_DCFLUSH; 1757 } 1758 #endif 1759 #ifdef __powerpc__ 1760 dma_cachectl(addr, count); 1761 #endif 1762 1763 /* 1764 * enintr() also enables interrupts for the sbic 1765 */ 1766 #ifdef DEBUG 1767 if (data_pointer_debug > 1) 1768 printf("sbicgo dmago:%d(%p:%lx)\n", 1769 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 1770 #if 0 1771 /* 1772 * Hmm - this isn't right: asr and csr haven't been set yet. 1773 */ 1774 debug_asr = asr; 1775 debug_csr = csr; 1776 #endif 1777 #endif 1778 1779 /* 1780 * Lets cycle a while then let the interrupt handler take over 1781 */ 1782 1783 GET_SBIC_asr(regs, asr); 1784 do { 1785 GET_SBIC_csr(regs, csr); 1786 CSR_TRACE('g',csr,asr,dev->target); 1787 #ifdef DEBUG 1788 debug_csr = csr; 1789 routine = 1; 1790 #endif 1791 QPRINTF(("go[0x%x]", csr)); 1792 1793 i = sbicnextstate(dev, csr, asr); 1794 1795 WAIT_CIP(regs); 1796 GET_SBIC_asr(regs, asr); 1797 #ifdef DEBUG 1798 debug_asr = asr; 1799 #endif 1800 if (asr & SBIC_ASR_LCI) printf("sbicgo: LCI asr:%02x csr:%02x\n", 1801 asr,csr); 1802 } while (i == SBIC_STATE_RUNNING 1803 && asr & (SBIC_ASR_INT|SBIC_ASR_LCI)); 1804 1805 CSR_TRACE('g',csr,asr,i<<4); 1806 SBIC_TRACE(dev); 1807 if (i == SBIC_STATE_DONE && dev->sc_stat[0] == 0xff) printf("sbicgo: done & stat = 0xff\n"); 1808 if (i == SBIC_STATE_DONE && dev->sc_stat[0] != 0xff) { 1809 /* if (i == SBIC_STATE_DONE && dev->sc_stat[0]) { */ 1810 /* Did we really finish that fast? */ 1811 return 1; 1812 } 1813 return 0; 1814 } 1815 1816 1817 int 1818 sbicintr(struct sbic_softc *dev) 1819 { 1820 sbic_regmap_t regs; 1821 u_char asr, csr; 1822 int i; 1823 1824 regs = dev->sc_sbic; 1825 1826 /* 1827 * pending interrupt? 1828 */ 1829 GET_SBIC_asr (regs, asr); 1830 if ((asr & SBIC_ASR_INT) == 0) 1831 return(0); 1832 1833 SBIC_TRACE(dev); 1834 do { 1835 GET_SBIC_csr(regs, csr); 1836 CSR_TRACE('i',csr,asr,dev->target); 1837 #ifdef DEBUG 1838 debug_csr = csr; 1839 routine = 2; 1840 #endif 1841 QPRINTF(("intr[0x%x]", csr)); 1842 1843 i = sbicnextstate(dev, csr, asr); 1844 1845 WAIT_CIP(regs); 1846 GET_SBIC_asr(regs, asr); 1847 #ifdef DEBUG 1848 debug_asr = asr; 1849 #endif 1850 #if 0 1851 if (asr & SBIC_ASR_LCI) printf("sbicintr: LCI asr:%02x csr:%02x\n", 1852 asr,csr); 1853 #endif 1854 } while (i == SBIC_STATE_RUNNING && 1855 asr & (SBIC_ASR_INT|SBIC_ASR_LCI)); 1856 CSR_TRACE('i',csr,asr,i<<4); 1857 SBIC_TRACE(dev); 1858 return(1); 1859 } 1860 1861 /* 1862 * Run commands and wait for disconnect 1863 */ 1864 int 1865 sbicpoll(struct sbic_softc *dev) 1866 { 1867 sbic_regmap_t regs; 1868 u_char asr, csr; 1869 int i; 1870 1871 SBIC_TRACE(dev); 1872 regs = dev->sc_sbic; 1873 1874 do { 1875 GET_SBIC_asr (regs, asr); 1876 #ifdef DEBUG 1877 debug_asr = asr; 1878 #endif 1879 GET_SBIC_csr(regs, csr); 1880 CSR_TRACE('p',csr,asr,dev->target); 1881 #ifdef DEBUG 1882 debug_csr = csr; 1883 routine = 2; 1884 #endif 1885 QPRINTF(("poll[0x%x]", csr)); 1886 1887 i = sbicnextstate(dev, csr, asr); 1888 1889 WAIT_CIP(regs); 1890 GET_SBIC_asr(regs, asr); 1891 /* tapes may take a loooong time.. */ 1892 while (asr & SBIC_ASR_BSY){ 1893 if (asr & SBIC_ASR_DBR) { 1894 printf("sbipoll: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", 1895 csr,asr); 1896 #ifdef DDB 1897 Debugger(); 1898 #endif 1899 /* SBIC is jammed */ 1900 /* DUNNO which direction */ 1901 /* Try old direction */ 1902 GET_SBIC_data(regs,i); 1903 GET_SBIC_asr(regs, asr); 1904 if (asr & SBIC_ASR_DBR) /* Wants us to write */ 1905 SET_SBIC_data(regs,i); 1906 } 1907 GET_SBIC_asr(regs, asr); 1908 } 1909 1910 if (asr & SBIC_ASR_LCI) printf("sbicpoll: LCI asr:%02x csr:%02x\n", 1911 asr,csr); 1912 else if (i == 1) /* BSY */ 1913 SBIC_WAIT(regs, SBIC_ASR_INT, sbic_cmd_wait); 1914 } while (i == SBIC_STATE_RUNNING); 1915 CSR_TRACE('p',csr,asr,i<<4); 1916 SBIC_TRACE(dev); 1917 return(1); 1918 } 1919 1920 /* 1921 * Handle a single msgin 1922 */ 1923 1924 int 1925 sbicmsgin(struct sbic_softc *dev) 1926 { 1927 sbic_regmap_t regs; 1928 int recvlen; 1929 u_char asr, csr, *tmpaddr; 1930 1931 regs = dev->sc_sbic; 1932 1933 dev->sc_msg[0] = 0xff; 1934 dev->sc_msg[1] = 0xff; 1935 1936 GET_SBIC_asr(regs, asr); 1937 #ifdef DEBUG 1938 if (reselect_debug>1) 1939 printf("sbicmsgin asr=%02x\n", asr); 1940 #endif 1941 1942 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 1943 1944 GET_SBIC_selid (regs, csr); 1945 SET_SBIC_selid (regs, csr | SBIC_SID_FROM_SCSI); 1946 1947 SBIC_TC_PUT(regs, 0); 1948 tmpaddr = dev->sc_msg; 1949 recvlen = 1; 1950 do { 1951 while (recvlen--) { 1952 GET_SBIC_asr(regs, asr); 1953 GET_SBIC_csr(regs, csr); 1954 QPRINTF(("sbicmsgin ready to go (csr,asr)=(%02x,%02x)\n", 1955 csr, asr)); 1956 1957 RECV_BYTE(regs, *tmpaddr); 1958 CSR_TRACE('m',csr,asr,*tmpaddr); 1959 #if 1 1960 /* 1961 * get the command completion interrupt, or we 1962 * can't send a new command (LCI) 1963 */ 1964 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 1965 GET_SBIC_csr(regs, csr); 1966 CSR_TRACE('X',csr,asr,dev->target); 1967 #else 1968 WAIT_CIP(regs); 1969 do { 1970 GET_SBIC_asr(regs, asr); 1971 csr = 0xff; 1972 GET_SBIC_csr(regs, csr); 1973 CSR_TRACE('X',csr,asr,dev->target); 1974 if (csr == 0xff) 1975 printf("sbicmsgin waiting: csr %02x asr %02x\n", csr, asr); 1976 } while (csr == 0xff); 1977 #endif 1978 #ifdef DEBUG 1979 if (reselect_debug>1) 1980 printf("sbicmsgin: got %02x csr %02x asr %02x\n", 1981 *tmpaddr, csr, asr); 1982 #endif 1983 #if do_parity_check 1984 if (asr & SBIC_ASR_PE) { 1985 printf ("Parity error"); 1986 /* This code simply does not work. */ 1987 WAIT_CIP(regs); 1988 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 1989 WAIT_CIP(regs); 1990 GET_SBIC_asr(regs, asr); 1991 WAIT_CIP(regs); 1992 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 1993 WAIT_CIP(regs); 1994 if (!(asr & SBIC_ASR_LCI)) 1995 /* Target wants to send garbled msg*/ 1996 continue; 1997 printf("--fixing\n"); 1998 /* loop until a msgout phase occurs on target */ 1999 while ((csr & 0x07) != MESG_OUT_PHASE) { 2000 while ((asr & SBIC_ASR_BSY) && 2001 !(asr & SBIC_ASR_DBR|SBIC_ASR_INT)) 2002 GET_SBIC_asr(regs, asr); 2003 if (asr & SBIC_ASR_DBR) 2004 panic("msgin: jammed again!"); 2005 GET_SBIC_csr(regs, csr); 2006 CSR_TRACE('e',csr,asr,dev->target); 2007 if ((csr & 0x07) != MESG_OUT_PHASE) { 2008 sbicnextstate(dev, csr, asr); 2009 sbic_save_ptrs(dev, regs, 2010 dev->target, 2011 dev->lun); 2012 } 2013 } 2014 /* Should be msg out by now */ 2015 SEND_BYTE(regs, MSG_PARITY_ERROR); 2016 } 2017 else 2018 #endif 2019 tmpaddr++; 2020 2021 if (recvlen) { 2022 /* Clear ACK */ 2023 WAIT_CIP(regs); 2024 GET_SBIC_asr(regs, asr); 2025 GET_SBIC_csr(regs, csr); 2026 CSR_TRACE('X',csr,asr,dev->target); 2027 QPRINTF(("sbicmsgin pre byte CLR_ACK (csr,asr)=(%02x,%02x)\n", 2028 csr, asr)); 2029 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2030 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2031 } 2032 2033 }; 2034 2035 if (dev->sc_msg[0] == 0xff) { 2036 printf("sbicmsgin: sbic swallowed our message\n"); 2037 break; 2038 } 2039 #ifdef DEBUG 2040 if (sync_debug) 2041 printf("msgin done csr 0x%x asr 0x%x msg 0x%x\n", 2042 csr, asr, dev->sc_msg[0]); 2043 #endif 2044 /* 2045 * test whether this is a reply to our sync 2046 * request 2047 */ 2048 if (MSG_ISIDENTIFY(dev->sc_msg[0])) { 2049 QPRINTF(("IFFY")); 2050 #if 0 2051 /* There is an implied load-ptrs here */ 2052 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 2053 #endif 2054 /* Got IFFY msg -- ack it */ 2055 } else if (dev->sc_msg[0] == MSG_REJECT 2056 && dev->sc_sync[dev->target].state == SYNC_SENT) { 2057 QPRINTF(("REJECT of SYN")); 2058 #ifdef DEBUG 2059 if (sync_debug) 2060 printf("target %d rejected sync, going async\n", 2061 dev->target); 2062 #endif 2063 dev->sc_sync[dev->target].period = sbic_min_period; 2064 dev->sc_sync[dev->target].offset = 0; 2065 dev->sc_sync[dev->target].state = SYNC_DONE; 2066 SET_SBIC_syn(regs, 2067 SBIC_SYN(dev->sc_sync[dev->target].offset, 2068 dev->sc_sync[dev->target].period)); 2069 } else if (dev->sc_msg[0] == MSG_REJECT) { 2070 QPRINTF(("REJECT")); 2071 /* 2072 * we'll never REJECt a REJECT message.. 2073 */ 2074 } else if (dev->sc_msg[0] == MSG_SAVE_DATA_PTR) { 2075 QPRINTF(("MSG_SAVE_DATA_PTR")); 2076 /* 2077 * don't reject this either. 2078 */ 2079 } else if (dev->sc_msg[0] == MSG_DISCONNECT) { 2080 QPRINTF(("DISCONNECT")); 2081 #ifdef DEBUG 2082 if (reselect_debug>1 && dev->sc_msg[0] == MSG_DISCONNECT) 2083 printf("sbicmsgin: got disconnect msg %s\n", 2084 (dev->sc_flags & SBICF_ICMD)?"rejecting":""); 2085 #endif 2086 if (dev->sc_flags & SBICF_ICMD) { 2087 /* We're in immediate mode. Prevent disconnects. */ 2088 /* prepare to reject the message, NACK */ 2089 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 2090 WAIT_CIP(regs); 2091 } 2092 } else if (dev->sc_msg[0] == MSG_CMD_COMPLETE) { 2093 QPRINTF(("CMD_COMPLETE")); 2094 /* !! KLUDGE ALERT !! quite a few drives don't seem to 2095 * really like the current way of sending the 2096 * sync-handshake together with the ident-message, and 2097 * they react by sending command-complete and 2098 * disconnecting right after returning the valid sync 2099 * handshake. So, all I can do is reselect the drive, 2100 * and hope it won't disconnect again. I don't think 2101 * this is valid behavior, but I can't help fixing a 2102 * problem that apparently exists. 2103 * 2104 * Note: we should not get here on `normal' command 2105 * completion, as that condition is handled by the 2106 * high-level sel&xfer resume command used to walk 2107 * thru status/cc-phase. 2108 */ 2109 2110 #ifdef DEBUG 2111 if (sync_debug) 2112 printf ("GOT MSG %d! target %d acting weird.." 2113 " waiting for disconnect...\n", 2114 dev->sc_msg[0], dev->target); 2115 #endif 2116 /* Check to see if sbic is handling this */ 2117 GET_SBIC_asr(regs, asr); 2118 if (asr & SBIC_ASR_BSY) 2119 return SBIC_STATE_RUNNING; 2120 2121 /* Let's try this: Assume it works and set status to 00 */ 2122 dev->sc_stat[0] = 0; 2123 } else if (dev->sc_msg[0] == MSG_EXT_MESSAGE 2124 && tmpaddr == &dev->sc_msg[1]) { 2125 QPRINTF(("ExtMSG\n")); 2126 /* Read in whole extended message */ 2127 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2128 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2129 GET_SBIC_asr(regs, asr); 2130 GET_SBIC_csr(regs, csr); 2131 QPRINTF(("CLR ACK asr %02x, csr %02x\n", asr, csr)); 2132 RECV_BYTE(regs, *tmpaddr); 2133 CSR_TRACE('x',csr,asr,*tmpaddr); 2134 /* Wait for command completion IRQ */ 2135 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2136 recvlen = *tmpaddr++; 2137 QPRINTF(("Recving ext msg, asr %02x csr %02x len %02x\n", 2138 asr, csr, recvlen)); 2139 } else if (dev->sc_msg[0] == MSG_EXT_MESSAGE && dev->sc_msg[1] == 3 2140 && dev->sc_msg[2] == MSG_SYNC_REQ) { 2141 QPRINTF(("SYN")); 2142 dev->sc_sync[dev->target].period = 2143 sbicfromscsiperiod(dev, 2144 regs, dev->sc_msg[3]); 2145 dev->sc_sync[dev->target].offset = dev->sc_msg[4]; 2146 dev->sc_sync[dev->target].state = SYNC_DONE; 2147 SET_SBIC_syn(regs, 2148 SBIC_SYN(dev->sc_sync[dev->target].offset, 2149 dev->sc_sync[dev->target].period)); 2150 printf("%s: target %d now synchronous," 2151 " period=%dns, offset=%d.\n", 2152 device_xname(dev->sc_dev), dev->target, 2153 dev->sc_msg[3] * 4, dev->sc_msg[4]); 2154 } else { 2155 #ifdef DEBUG 2156 if (sbic_debug || sync_debug) 2157 printf ("sbicmsgin: Rejecting message 0x%02x\n", 2158 dev->sc_msg[0]); 2159 #endif 2160 /* prepare to reject the message, NACK */ 2161 SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN); 2162 WAIT_CIP(regs); 2163 } 2164 /* Clear ACK */ 2165 WAIT_CIP(regs); 2166 GET_SBIC_asr(regs, asr); 2167 GET_SBIC_csr(regs, csr); 2168 CSR_TRACE('X',csr,asr,dev->target); 2169 QPRINTF(("sbicmsgin pre CLR_ACK (csr,asr)=(%02x,%02x)%d\n", 2170 csr, asr, recvlen)); 2171 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2172 SBIC_WAIT(regs, SBIC_ASR_INT, 0); 2173 } 2174 #if 0 2175 while ((csr == SBIC_CSR_MSGIN_W_ACK) 2176 || (SBIC_PHASE(csr) == MESG_IN_PHASE)); 2177 #else 2178 while (recvlen>0); 2179 #endif 2180 2181 QPRINTF(("sbicmsgin finished: csr %02x, asr %02x\n",csr, asr)); 2182 2183 /* Should still have one CSR to read */ 2184 return SBIC_STATE_RUNNING; 2185 } 2186 2187 2188 /* 2189 * sbicnextstate() 2190 * return: 2191 * 0 == done 2192 * 1 == working 2193 * 2 == disconnected 2194 * -1 == error 2195 */ 2196 int 2197 sbicnextstate(struct sbic_softc *dev, u_char csr, u_char asr) 2198 { 2199 sbic_regmap_t regs; 2200 struct sbic_acb *acb; 2201 int i, newtarget, newlun, wait; 2202 #if 0 2203 unsigned tcnt; 2204 #endif 2205 2206 i = 0; 2207 SBIC_TRACE(dev); 2208 regs = dev->sc_sbic; 2209 acb = dev->sc_nexus; 2210 2211 QPRINTF(("next[%02x,%02x]",asr,csr)); 2212 2213 switch (csr) { 2214 case SBIC_CSR_XFERRED|CMD_PHASE: 2215 case SBIC_CSR_MIS|CMD_PHASE: 2216 case SBIC_CSR_MIS_1|CMD_PHASE: 2217 case SBIC_CSR_MIS_2|CMD_PHASE: 2218 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2219 if (sbicxfstart(regs, acb->clen, CMD_PHASE, sbic_cmd_wait)) 2220 if (sbicxfout(regs, acb->clen, 2221 &acb->cmd, CMD_PHASE)) 2222 goto abort; 2223 break; 2224 2225 case SBIC_CSR_XFERRED|STATUS_PHASE: 2226 case SBIC_CSR_MIS|STATUS_PHASE: 2227 case SBIC_CSR_MIS_1|STATUS_PHASE: 2228 case SBIC_CSR_MIS_2|STATUS_PHASE: 2229 /* 2230 * this should be the normal i/o completion case. 2231 * get the status & cmd complete msg then let the 2232 * device driver look at what happened. 2233 */ 2234 sbicxfdone(dev,regs,dev->target); 2235 /* 2236 * check for overlapping cache line, flush if so 2237 */ 2238 #if defined(M68040) || defined(M68060) 2239 if (dev->sc_flags & SBICF_DCFLUSH) { 2240 #if 0 2241 printf("sbic: 68040/68060 DMA cache flush needs" 2242 "fixing? %x:%x\n", 2243 dev->sc_xs->data, dev->sc_xs->datalen); 2244 #endif 2245 } 2246 #endif 2247 #ifdef DEBUG 2248 if (data_pointer_debug > 1) 2249 printf("next dmastop: %d(%p:%lx)\n", 2250 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2251 dev->sc_dmatimo = 0; 2252 #endif 2253 dev->sc_dmastop(dev); /* was dmafree */ 2254 if (acb->flags & ACB_BBUF) { 2255 if ((u_char *)kvtop(acb->sc_dmausrbuf) != acb->sc_usrbufpa) 2256 printf("%s: WARNING - buffer mapping changed %p->%x\n", 2257 device_xname(dev->sc_dev), acb->sc_usrbufpa, 2258 (unsigned)kvtop(acb->sc_dmausrbuf)); 2259 #ifdef DEBUG 2260 if (data_pointer_debug) 2261 printf("sbicgo:copying %lx bytes from target %d bounce %x\n", 2262 acb->sc_dmausrlen, 2263 dev->target, 2264 (unsigned)kvtop(dev->sc_tinfo[dev->target].bounce)); 2265 #endif 2266 bcopy(dev->sc_tinfo[dev->target].bounce, 2267 acb->sc_dmausrbuf, 2268 acb->sc_dmausrlen); 2269 } 2270 dev->sc_flags &= ~(SBICF_INDMA | SBICF_DCFLUSH); 2271 sbic_scsidone(acb, dev->sc_stat[0]); 2272 SBIC_TRACE(dev); 2273 return SBIC_STATE_DONE; 2274 2275 case SBIC_CSR_XFERRED|DATA_OUT_PHASE: 2276 case SBIC_CSR_XFERRED|DATA_IN_PHASE: 2277 case SBIC_CSR_MIS|DATA_OUT_PHASE: 2278 case SBIC_CSR_MIS|DATA_IN_PHASE: 2279 case SBIC_CSR_MIS_1|DATA_OUT_PHASE: 2280 case SBIC_CSR_MIS_1|DATA_IN_PHASE: 2281 case SBIC_CSR_MIS_2|DATA_OUT_PHASE: 2282 case SBIC_CSR_MIS_2|DATA_IN_PHASE: 2283 if ((dev->sc_xs->xs_control & XS_CTL_POLL) || 2284 (dev->sc_flags & SBICF_ICMD) || acb->sc_dmacmd == 0) { 2285 /* Do PIO */ 2286 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 2287 if (acb->sc_kv.dc_count <= 0) { 2288 printf("sbicnextstate:xfer count %d asr%x csr%x\n", 2289 acb->sc_kv.dc_count, asr, csr); 2290 goto abort; 2291 } 2292 wait = sbic_data_wait; 2293 if (sbicxfstart(regs, 2294 acb->sc_kv.dc_count, 2295 SBIC_PHASE(csr), wait)) { 2296 if (SBIC_PHASE(csr) == DATA_IN_PHASE) 2297 /* data in? */ 2298 i=sbicxfin(regs, 2299 acb->sc_kv.dc_count, 2300 acb->sc_kv.dc_addr); 2301 else 2302 i=sbicxfout(regs, 2303 acb->sc_kv.dc_count, 2304 acb->sc_kv.dc_addr, 2305 SBIC_PHASE(csr)); 2306 } 2307 acb->sc_kv.dc_addr += 2308 (acb->sc_kv.dc_count - i); 2309 acb->sc_kv.dc_count = i; 2310 } else { 2311 if (acb->sc_kv.dc_count <= 0) { 2312 printf("sbicnextstate:xfer count %d asr%x csr%x\n", 2313 acb->sc_kv.dc_count, asr, csr); 2314 goto abort; 2315 } 2316 /* 2317 * do scatter-gather DMA 2318 * hacking the controller chip, ouch.. 2319 */ 2320 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI | 2321 SBIC_MACHINE_DMA_MODE); 2322 /* 2323 * set next DMA addr and dec count 2324 */ 2325 #if 0 2326 SBIC_TC_GET(regs, tcnt); 2327 dev->sc_cur->dc_count -= ((dev->sc_tcnt - tcnt) >> 1); 2328 dev->sc_cur->dc_addr += (dev->sc_tcnt - tcnt); 2329 dev->sc_tcnt = acb->sc_tcnt = tcnt; 2330 #else 2331 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2332 sbic_load_ptrs(dev, regs, dev->target, dev->lun); 2333 #endif 2334 #ifdef DEBUG 2335 if (data_pointer_debug > 1) 2336 printf("next dmanext: %d(%p:%lx)\n", 2337 dev->target,dev->sc_cur->dc_addr, 2338 dev->sc_tcnt); 2339 dev->sc_dmatimo = 1; 2340 #endif 2341 dev->sc_tcnt = dev->sc_dmanext(dev); 2342 SBIC_TC_PUT(regs, (unsigned)dev->sc_tcnt); 2343 SET_SBIC_cmd(regs, SBIC_CMD_XFER_INFO); 2344 dev->sc_flags |= SBICF_INDMA; 2345 } 2346 break; 2347 2348 case SBIC_CSR_XFERRED|MESG_IN_PHASE: 2349 case SBIC_CSR_MIS|MESG_IN_PHASE: 2350 case SBIC_CSR_MIS_1|MESG_IN_PHASE: 2351 case SBIC_CSR_MIS_2|MESG_IN_PHASE: 2352 SBIC_TRACE(dev); 2353 return sbicmsgin(dev); 2354 2355 case SBIC_CSR_MSGIN_W_ACK: 2356 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); /* Dunno what I'm ACKing */ 2357 printf("Acking unknown msgin CSR:%02x",csr); 2358 break; 2359 2360 case SBIC_CSR_XFERRED|MESG_OUT_PHASE: 2361 case SBIC_CSR_MIS|MESG_OUT_PHASE: 2362 case SBIC_CSR_MIS_1|MESG_OUT_PHASE: 2363 case SBIC_CSR_MIS_2|MESG_OUT_PHASE: 2364 #ifdef DEBUG 2365 if (sync_debug) 2366 printf ("sending REJECT msg to last msg.\n"); 2367 #endif 2368 2369 sbic_save_ptrs(dev, regs, dev->target, dev->lun); 2370 /* 2371 * should only get here on reject, 2372 * since it's always US that 2373 * initiate a sync transfer 2374 */ 2375 SEND_BYTE(regs, MSG_REJECT); 2376 WAIT_CIP(regs); 2377 if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI|SBIC_ASR_CIP)) 2378 printf("next: REJECT sent asr %02x\n", asr); 2379 SBIC_TRACE(dev); 2380 return SBIC_STATE_RUNNING; 2381 2382 case SBIC_CSR_DISC: 2383 case SBIC_CSR_DISC_1: 2384 dev->sc_flags &= ~(SBICF_INDMA|SBICF_SELECTED); 2385 2386 /* Try to schedule another target */ 2387 #ifdef DEBUG 2388 if (reselect_debug>1) 2389 printf("sbicnext target %d disconnected\n", dev->target); 2390 #endif 2391 TAILQ_INSERT_HEAD(&dev->nexus_list, acb, chain); 2392 ++dev->sc_tinfo[dev->target].dconns; 2393 dev->sc_nexus = NULL; 2394 dev->sc_xs = NULL; 2395 2396 if ((acb->xs->xs_control & XS_CTL_POLL) 2397 || (dev->sc_flags & SBICF_ICMD) 2398 || !sbic_parallel_operations) { 2399 SBIC_TRACE(dev); 2400 return SBIC_STATE_DISCONNECT; 2401 } 2402 sbic_sched(dev); 2403 SBIC_TRACE(dev); 2404 return SBIC_STATE_DISCONNECT; 2405 2406 case SBIC_CSR_RSLT_NI: 2407 case SBIC_CSR_RSLT_IFY: 2408 GET_SBIC_rselid(regs, newtarget); 2409 /* check SBIC_RID_SIV? */ 2410 newtarget &= SBIC_RID_MASK; 2411 if (csr == SBIC_CSR_RSLT_IFY) { 2412 /* Read IFY msg to avoid lockup */ 2413 GET_SBIC_data(regs, newlun); 2414 WAIT_CIP(regs); 2415 newlun &= SBIC_TLUN_MASK; 2416 CSR_TRACE('r',csr,asr,newtarget); 2417 } else { 2418 /* Need to get IFY message */ 2419 for (newlun = 256; newlun; --newlun) { 2420 GET_SBIC_asr(regs, asr); 2421 if (asr & SBIC_ASR_INT) 2422 break; 2423 delay(1); 2424 } 2425 newlun = 0; /* XXXX */ 2426 if ((asr & SBIC_ASR_INT) == 0) { 2427 #ifdef DEBUG 2428 if (reselect_debug) 2429 printf("RSLT_NI - no IFFY message? asr %x\n", asr); 2430 #endif 2431 } else { 2432 GET_SBIC_csr(regs,csr); 2433 CSR_TRACE('n',csr,asr,newtarget); 2434 if (csr == (SBIC_CSR_MIS | MESG_IN_PHASE) || 2435 csr == (SBIC_CSR_MIS_1 | MESG_IN_PHASE) || 2436 csr == (SBIC_CSR_MIS_2 | MESG_IN_PHASE)) { 2437 sbicmsgin(dev); 2438 newlun = dev->sc_msg[0] & 7; 2439 } else { 2440 printf("RSLT_NI - not MESG_IN_PHASE %x\n", 2441 csr); 2442 } 2443 } 2444 } 2445 #ifdef DEBUG 2446 if (reselect_debug>1 || (reselect_debug && csr==SBIC_CSR_RSLT_NI)) 2447 printf("sbicnext: reselect %s from targ %d lun %d\n", 2448 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY", 2449 newtarget, newlun); 2450 #endif 2451 if (dev->sc_nexus) { 2452 #ifdef DEBUG 2453 if (reselect_debug > 1) 2454 printf("%s: reselect %s with active command\n", 2455 device_xname(dev->sc_dev), 2456 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY"); 2457 #ifdef DDB 2458 /* Debugger();*/ 2459 #endif 2460 #endif 2461 TAILQ_INSERT_HEAD(&dev->ready_list, dev->sc_nexus, chain); 2462 dev->sc_tinfo[dev->target].lubusy &= ~(1 << dev->lun); 2463 dev->sc_nexus = NULL; 2464 dev->sc_xs = NULL; 2465 } 2466 /* Reload sync values for this target */ 2467 if (dev->sc_sync[newtarget].state == SYNC_DONE) 2468 SET_SBIC_syn(regs, SBIC_SYN (dev->sc_sync[newtarget].offset, 2469 dev->sc_sync[newtarget].period)); 2470 else 2471 SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period)); 2472 for (acb = dev->nexus_list.tqh_first; acb; 2473 acb = acb->chain.tqe_next) { 2474 if (acb->xs->xs_periph->periph_target != newtarget || 2475 acb->xs->xs_periph->periph_lun != newlun) 2476 continue; 2477 TAILQ_REMOVE(&dev->nexus_list, acb, chain); 2478 dev->sc_nexus = acb; 2479 dev->sc_xs = acb->xs; 2480 dev->sc_flags |= SBICF_SELECTED; 2481 dev->target = newtarget; 2482 dev->lun = newlun; 2483 break; 2484 } 2485 if (acb == NULL) { 2486 printf("%s: reselect %s targ %d not in nexus_list %p\n", 2487 device_xname(dev->sc_dev), 2488 csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY", newtarget, 2489 &dev->nexus_list.tqh_first); 2490 panic("bad reselect in sbic"); 2491 } 2492 if (csr == SBIC_CSR_RSLT_IFY) 2493 SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK); 2494 break; 2495 2496 default: 2497 abort: 2498 /* 2499 * Something unexpected happened -- deal with it. 2500 */ 2501 printf("sbicnextstate: aborting csr %02x asr %02x\n", csr, asr); 2502 #ifdef DDB 2503 Debugger(); 2504 #endif 2505 #ifdef DEBUG 2506 if (data_pointer_debug > 1) 2507 printf("next dmastop: %d(%p:%lx)\n", 2508 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2509 dev->sc_dmatimo = 0; 2510 #endif 2511 dev->sc_dmastop(dev); 2512 SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI); 2513 sbicerror(dev, regs, csr); 2514 sbicabort(dev, regs, "next"); 2515 if (dev->sc_flags & SBICF_INDMA) { 2516 /* 2517 * check for overlapping cache line, flush if so 2518 */ 2519 #if defined(M68040) || defined(M68060) 2520 if (dev->sc_flags & SBICF_DCFLUSH) { 2521 #if 0 2522 printf("sbic: 68040/060 DMA cache flush needs" 2523 "fixing? %x:%x\n", 2524 dev->sc_xs->data, dev->sc_xs->datalen); 2525 #endif 2526 } 2527 #endif 2528 dev->sc_flags &= 2529 ~(SBICF_INDMA | SBICF_DCFLUSH); 2530 #ifdef DEBUG 2531 if (data_pointer_debug > 1) 2532 printf("next dmastop: %d(%p:%lx)\n", 2533 dev->target,dev->sc_cur->dc_addr,dev->sc_tcnt); 2534 dev->sc_dmatimo = 0; 2535 #endif 2536 dev->sc_dmastop(dev); 2537 sbic_scsidone(acb, -1); 2538 } 2539 SBIC_TRACE(dev); 2540 return SBIC_STATE_ERROR; 2541 } 2542 2543 SBIC_TRACE(dev); 2544 return(SBIC_STATE_RUNNING); 2545 } 2546 2547 2548 /* 2549 * Check if DMA can not be used with specified buffer 2550 */ 2551 2552 int 2553 sbiccheckdmap(void *bp, u_long len, u_long mask) 2554 { 2555 u_char *buffer; 2556 u_long phy_buf; 2557 u_long phy_len; 2558 2559 buffer = bp; 2560 2561 if (len == 0) 2562 return(0); 2563 2564 while (len) { 2565 phy_buf = kvtop(buffer); 2566 if (len < (phy_len = PAGE_SIZE - ((int) buffer & PGOFSET))) 2567 phy_len = len; 2568 if (phy_buf & mask) 2569 return(1); 2570 buffer += phy_len; 2571 len -= phy_len; 2572 } 2573 return(0); 2574 } 2575 2576 int 2577 sbictoscsiperiod(struct sbic_softc *dev, sbic_regmap_t regs, int a) 2578 { 2579 unsigned int fs; 2580 2581 /* 2582 * cycle = DIV / (2*CLK) 2583 * DIV = FS+2 2584 * best we can do is 200ns at 20 MHz, 2 cycles 2585 */ 2586 2587 GET_SBIC_myid(regs,fs); 2588 fs = (fs >>6) + 2; /* DIV */ 2589 fs = (fs * 10000) / (dev->sc_clkfreq<<1); /* Cycle, in ns */ 2590 if (a < 2) a = 8; /* map to Cycles */ 2591 return ((fs*a)>>2); /* in 4 ns units */ 2592 } 2593 2594 int 2595 sbicfromscsiperiod(struct sbic_softc *dev, sbic_regmap_t regs, int p) 2596 { 2597 register unsigned int fs, ret; 2598 2599 /* Just the inverse of the above */ 2600 2601 GET_SBIC_myid(regs,fs); 2602 fs = (fs >>6) + 2; /* DIV */ 2603 fs = (fs * 10000) / (dev->sc_clkfreq<<1); /* Cycle, in ns */ 2604 2605 ret = p << 2; /* in ns units */ 2606 ret = ret / fs; /* in Cycles */ 2607 if (ret < sbic_min_period) 2608 return(sbic_min_period); 2609 2610 /* verify rounding */ 2611 if (sbictoscsiperiod(dev, regs, ret) < p) 2612 ret++; 2613 return (ret >= 8) ? 0 : ret; 2614 } 2615 2616 #ifdef DEBUG 2617 2618 void 2619 sbicdumpstate(void) 2620 { 2621 u_char csr, asr; 2622 2623 GET_SBIC_asr(debug_sbic_regs,asr); 2624 GET_SBIC_csr(debug_sbic_regs,csr); 2625 printf("%s: asr:csr(%02x:%02x)->(%02x:%02x)\n", 2626 (routine==1)?"sbicgo": 2627 (routine==2)?"sbicintr": 2628 (routine==3)?"sbicicmd": 2629 (routine==4)?"sbicnext":"unknown", 2630 debug_asr, debug_csr, asr, csr); 2631 2632 } 2633 2634 void 2635 sbictimeout(struct sbic_softc *dev) 2636 { 2637 int s, asr; 2638 2639 s = splbio(); 2640 if (dev->sc_dmatimo) { 2641 if (dev->sc_dmatimo > 1) { 2642 printf("%s: DMA timeout #%d\n", 2643 device_xname(dev->sc_dev), dev->sc_dmatimo - 1); 2644 GET_SBIC_asr(dev->sc_sbic, asr); 2645 if (asr & SBIC_ASR_INT) { 2646 /* We need to service a missed IRQ */ 2647 printf("Servicing a missed int:(%02x,%02x)->(%02x,?)\n", 2648 debug_asr, debug_csr, asr); 2649 sbicintr(dev); 2650 } 2651 sbicdumpstate(); 2652 } 2653 dev->sc_dmatimo++; 2654 } 2655 splx(s); 2656 callout_reset(&dev->sc_timo_ch, 30 * hz, 2657 (void *)sbictimeout, dev); 2658 } 2659 2660 void 2661 sbic_dump_acb(struct sbic_acb *acb) 2662 { 2663 u_char *b = (u_char *) &acb->cmd; 2664 int i; 2665 2666 printf("acb@%p ", acb); 2667 if (acb->xs == NULL) { 2668 printf("<unused>\n"); 2669 return; 2670 } 2671 printf("(%d:%d) flags %2x clen %2d cmd ", 2672 acb->xs->xs_periph->periph_target, 2673 acb->xs->xs_periph->periph_lun, acb->flags, acb->clen); 2674 for (i = acb->clen; i; --i) 2675 printf(" %02x", *b++); 2676 printf("\n"); 2677 printf(" xs: %8p data %8p:%04x ", acb->xs, acb->xs->data, 2678 acb->xs->datalen); 2679 printf("va %8p:%04x ", acb->sc_kv.dc_addr, acb->sc_kv.dc_count); 2680 printf("pa %8p:%04x tcnt %lx\n", acb->sc_pa.dc_addr, acb->sc_pa.dc_count, 2681 acb->sc_tcnt); 2682 } 2683 2684 void 2685 sbic_dump(struct sbic_softc *dev) 2686 { 2687 sbic_regmap_t regs; 2688 u_char csr, asr; 2689 struct sbic_acb *acb; 2690 int s; 2691 int i; 2692 2693 s = splbio(); 2694 regs = dev->sc_sbic; 2695 #if CSR_TRACE_SIZE 2696 printf("csr trace: "); 2697 i = csr_traceptr; 2698 do { 2699 printf("%c%02x%02x%02x ", csr_trace[i].whr, 2700 csr_trace[i].csr, csr_trace[i].asr, csr_trace[i].xtn); 2701 switch(csr_trace[i].whr) { 2702 case 'g': 2703 printf("go "); break; 2704 case 's': 2705 printf("select "); break; 2706 case 'y': 2707 printf("select+ "); break; 2708 case 'i': 2709 printf("intr "); break; 2710 case 'f': 2711 printf("finish "); break; 2712 case '>': 2713 printf("out "); break; 2714 case '<': 2715 printf("in "); break; 2716 case 'm': 2717 printf("msgin "); break; 2718 case 'x': 2719 printf("msginx "); break; 2720 case 'X': 2721 printf("msginX "); break; 2722 case 'r': 2723 printf("reselect "); break; 2724 case 'I': 2725 printf("icmd "); break; 2726 case 'a': 2727 printf("abort "); break; 2728 default: 2729 printf("? "); 2730 } 2731 switch(csr_trace[i].csr) { 2732 case 0x11: 2733 printf("INITIATOR"); break; 2734 case 0x16: 2735 printf("S_XFERRED"); break; 2736 case 0x20: 2737 printf("MSGIN_ACK"); break; 2738 case 0x41: 2739 printf("DISC"); break; 2740 case 0x42: 2741 printf("SEL_TIMEO"); break; 2742 case 0x80: 2743 printf("RSLT_NI"); break; 2744 case 0x81: 2745 printf("RSLT_IFY"); break; 2746 case 0x85: 2747 printf("DISC_1"); break; 2748 case 0x18: case 0x19: case 0x1a: 2749 case 0x1b: case 0x1e: case 0x1f: 2750 case 0x28: case 0x29: case 0x2a: 2751 case 0x2b: case 0x2e: case 0x2f: 2752 case 0x48: case 0x49: case 0x4a: 2753 case 0x4b: case 0x4e: case 0x4f: 2754 case 0x88: case 0x89: case 0x8a: 2755 case 0x8b: case 0x8e: case 0x8f: 2756 switch(csr_trace[i].csr & 0xf0) { 2757 case 0x10: 2758 printf("DONE_"); break; 2759 case 0x20: 2760 printf("STOP_"); break; 2761 case 0x40: 2762 printf("ERR_"); break; 2763 case 0x80: 2764 printf("REQ_"); break; 2765 } 2766 switch(csr_trace[i].csr & 7) { 2767 case 0: 2768 printf("DATA_OUT"); break; 2769 case 1: 2770 printf("DATA_IN"); break; 2771 case 2: 2772 printf("CMD"); break; 2773 case 3: 2774 printf("STATUS"); break; 2775 case 6: 2776 printf("MSG_OUT"); break; 2777 case 7: 2778 printf("MSG_IN"); break; 2779 default: 2780 printf("invld phs"); 2781 } 2782 break; 2783 default: printf("****"); break; 2784 } 2785 if (csr_trace[i].asr & SBIC_ASR_INT) 2786 printf(" ASR_INT"); 2787 if (csr_trace[i].asr & SBIC_ASR_LCI) 2788 printf(" ASR_LCI"); 2789 if (csr_trace[i].asr & SBIC_ASR_BSY) 2790 printf(" ASR_BSY"); 2791 if (csr_trace[i].asr & SBIC_ASR_CIP) 2792 printf(" ASR_CIP"); 2793 printf("\n"); 2794 i = (i + 1) & (CSR_TRACE_SIZE - 1); 2795 } while (i != csr_traceptr); 2796 #endif 2797 GET_SBIC_asr(regs, asr); 2798 if ((asr & SBIC_ASR_INT) == 0) 2799 GET_SBIC_csr(regs, csr); 2800 else 2801 csr = 0; 2802 printf("%s@%p regs %p/%p asr %x csr %x\n", device_xname(dev->sc_dev), 2803 dev, regs.sbic_asr_p, regs.sbic_value_p, asr, csr); 2804 if ((acb = dev->free_list.tqh_first)) { 2805 printf("Free list:\n"); 2806 while (acb) { 2807 sbic_dump_acb(acb); 2808 acb = acb->chain.tqe_next; 2809 } 2810 } 2811 if ((acb = dev->ready_list.tqh_first)) { 2812 printf("Ready list:\n"); 2813 while (acb) { 2814 sbic_dump_acb(acb); 2815 acb = acb->chain.tqe_next; 2816 } 2817 } 2818 if ((acb = dev->nexus_list.tqh_first)) { 2819 printf("Nexus list:\n"); 2820 while (acb) { 2821 sbic_dump_acb(acb); 2822 acb = acb->chain.tqe_next; 2823 } 2824 } 2825 if (dev->sc_nexus) { 2826 printf("nexus:\n"); 2827 sbic_dump_acb(dev->sc_nexus); 2828 } 2829 printf("sc_xs %p targ %d lun %d flags %x tcnt %lx dmacmd %x mask %lx\n", 2830 dev->sc_xs, dev->target, dev->lun, dev->sc_flags, dev->sc_tcnt, 2831 dev->sc_dmacmd, dev->sc_dmamask); 2832 for (i = 0; i < 8; ++i) { 2833 if (dev->sc_tinfo[i].cmds > 2) { 2834 printf("tgt %d: cmds %d disc %d lubusy %x\n", 2835 i, dev->sc_tinfo[i].cmds, 2836 dev->sc_tinfo[i].dconns, 2837 dev->sc_tinfo[i].lubusy); 2838 } 2839 } 2840 splx(s); 2841 } 2842 2843 #endif
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