1 /* $NetBSD: aic7xxx_osm.c,v 1.43 2023/08/01 21:26:28 andvar Exp $ */ 2 3 /* 4 * Bus independent FreeBSD shim for the aic7xxx based adaptec SCSI controllers 5 * 6 * Copyright (c) 1994-2001 Justin T. Gibbs. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions, and the following disclaimer, 14 * without modification. 15 * 2. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * Alternatively, this software may be distributed under the terms of the 19 * GNU Public License ("GPL"). 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * //depot/aic7xxx/freebsd/dev/aic7xxx/aic7xxx_osm.c#12 $ 34 * 35 * $FreeBSD: src/sys/dev/aic7xxx/aic7xxx_osm.c,v 1.31 2002/11/30 19:08:58 scottl Exp $ 36 */ 37 /* 38 * Ported from FreeBSD by Pascal Renauld, Network Storage Solutions, Inc. - April 2003 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: aic7xxx_osm.c,v 1.43 2023/08/01 21:26:28 andvar Exp $"); 43 44 #include <dev/ic/aic7xxx_osm.h> 45 #include <dev/ic/aic7xxx_inline.h> 46 47 #ifndef AHC_TMODE_ENABLE 48 #define AHC_TMODE_ENABLE 0 49 #endif 50 51 52 static void ahc_action(struct scsipi_channel *chan, 53 scsipi_adapter_req_t req, void *arg); 54 static void ahc_execute_scb(void *arg, bus_dma_segment_t *dm_segs, 55 int nsegments); 56 static int ahc_poll(struct ahc_softc *ahc, int wait); 57 static void ahc_setup_data(struct ahc_softc *ahc, 58 struct scsipi_xfer *xs, struct scb *scb); 59 static void ahc_set_recoveryscb(struct ahc_softc *ahc, struct scb *scb); 60 static int ahc_ioctl(struct scsipi_channel *channel, u_long cmd, 61 void *addr, int flag, struct proc *p); 62 63 static bool ahc_pmf_suspend(device_t, const pmf_qual_t *); 64 static bool ahc_pmf_resume(device_t, const pmf_qual_t *); 65 static bool ahc_pmf_shutdown(device_t, int); 66 67 68 /* 69 * Attach all the sub-devices we can find 70 */ 71 int 72 ahc_attach(struct ahc_softc *ahc) 73 { 74 u_long s; 75 int i; 76 char ahc_info[256]; 77 78 LIST_INIT(&ahc->pending_scbs); 79 for (i = 0; i < AHC_NUM_TARGETS; i++) 80 TAILQ_INIT(&ahc->untagged_queues[i]); 81 82 ahc_lock(ahc, &s); 83 84 ahc->sc_adapter.adapt_dev = ahc->sc_dev; 85 ahc->sc_adapter.adapt_nchannels = (ahc->features & AHC_TWIN) ? 2 : 1; 86 87 ahc->sc_adapter.adapt_openings = ahc->scb_data->numscbs - 1; 88 ahc->sc_adapter.adapt_max_periph = 16; 89 90 ahc->sc_adapter.adapt_ioctl = ahc_ioctl; 91 ahc->sc_adapter.adapt_minphys = ahc_minphys; 92 ahc->sc_adapter.adapt_request = ahc_action; 93 94 ahc->sc_channel.chan_adapter = &ahc->sc_adapter; 95 ahc->sc_channel.chan_bustype = &scsi_bustype; 96 ahc->sc_channel.chan_channel = 0; 97 ahc->sc_channel.chan_ntargets = (ahc->features & AHC_WIDE) ? 16 : 8; 98 ahc->sc_channel.chan_nluns = 8 /*AHC_NUM_LUNS*/; 99 ahc->sc_channel.chan_id = ahc->our_id; 100 ahc->sc_channel.chan_flags |= SCSIPI_CHAN_CANGROW; 101 102 if (ahc->features & AHC_TWIN) { 103 ahc->sc_channel_b = ahc->sc_channel; 104 ahc->sc_channel_b.chan_id = ahc->our_id_b; 105 ahc->sc_channel_b.chan_channel = 1; 106 } 107 108 ahc_controller_info(ahc, ahc_info, sizeof(ahc_info)); 109 printf("%s: %s\n", device_xname(ahc->sc_dev), ahc_info); 110 111 if ((ahc->flags & AHC_PRIMARY_CHANNEL) == 0) { 112 ahc->sc_child = config_found(ahc->sc_dev, 113 &ahc->sc_channel, scsiprint, CFARGS_NONE); 114 if (ahc->features & AHC_TWIN) 115 ahc->sc_child_b = config_found(ahc->sc_dev, 116 &ahc->sc_channel_b, scsiprint, CFARGS_NONE); 117 } else { 118 if (ahc->features & AHC_TWIN) 119 ahc->sc_child = config_found(ahc->sc_dev, 120 &ahc->sc_channel_b, scsiprint, CFARGS_NONE); 121 ahc->sc_child_b = config_found(ahc->sc_dev, 122 &ahc->sc_channel, scsiprint, CFARGS_NONE); 123 } 124 125 ahc_intr_enable(ahc, TRUE); 126 127 if (ahc->flags & AHC_RESET_BUS_A) 128 ahc_reset_channel(ahc, 'A', TRUE); 129 if ((ahc->features & AHC_TWIN) && ahc->flags & AHC_RESET_BUS_B) 130 ahc_reset_channel(ahc, 'B', TRUE); 131 132 if (!pmf_device_register1(ahc->sc_dev, 133 ahc_pmf_suspend, ahc_pmf_resume, ahc_pmf_shutdown)) 134 aprint_error_dev(ahc->sc_dev, 135 "couldn't establish power handler\n"); 136 137 ahc_unlock(ahc, &s); 138 return (1); 139 } 140 141 /* 142 * XXX we should call the real suspend and resume functions here 143 * but pmf(9) stuff on cardbus backend is untested yet 144 */ 145 146 static bool 147 ahc_pmf_suspend(device_t dev, const pmf_qual_t *qual) 148 { 149 struct ahc_softc *sc = device_private(dev); 150 #if 0 151 return (ahc_suspend(sc) == 0); 152 #else 153 ahc_shutdown(sc); 154 return true; 155 #endif 156 } 157 158 static bool 159 ahc_pmf_resume(device_t dev, const pmf_qual_t *qual) 160 { 161 #if 0 162 struct ahc_softc *sc = device_private(dev); 163 164 return (ahc_resume(sc) == 0); 165 #else 166 return true; 167 #endif 168 } 169 170 static bool 171 ahc_pmf_shutdown(device_t dev, int howto) 172 { 173 struct ahc_softc *sc = device_private(dev); 174 175 /* Disable all interrupt sources by resetting the controller */ 176 ahc_shutdown(sc); 177 178 return true; 179 } 180 181 /* 182 * Catch an interrupt from the adapter 183 */ 184 void 185 ahc_platform_intr(void *arg) 186 { 187 struct ahc_softc *ahc; 188 189 ahc = arg; 190 ahc_intr(ahc); 191 } 192 193 /* 194 * We have an scb which has been processed by the 195 * adaptor, now we look to see how the operation 196 * went. 197 */ 198 void 199 ahc_done(struct ahc_softc *ahc, struct scb *scb) 200 { 201 struct scsipi_xfer *xs; 202 struct scsipi_periph *periph; 203 u_long s; 204 205 xs = scb->xs; 206 periph = xs->xs_periph; 207 LIST_REMOVE(scb, pending_links); 208 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 209 struct scb_tailq *untagged_q; 210 int target_offset; 211 212 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 213 untagged_q = &ahc->untagged_queues[target_offset]; 214 TAILQ_REMOVE(untagged_q, scb, links.tqe); 215 scb->flags &= ~SCB_UNTAGGEDQ; 216 ahc_run_untagged_queue(ahc, untagged_q); 217 } 218 219 callout_stop(&scb->xs->xs_callout); 220 221 if (xs->datalen) { 222 int op; 223 224 if (xs->xs_control & XS_CTL_DATA_IN) 225 op = BUS_DMASYNC_POSTREAD; 226 else 227 op = BUS_DMASYNC_POSTWRITE; 228 bus_dmamap_sync(ahc->parent_dmat, scb->dmamap, 0, 229 scb->dmamap->dm_mapsize, op); 230 bus_dmamap_unload(ahc->parent_dmat, scb->dmamap); 231 } 232 233 /* 234 * If the recovery SCB completes, we have to be 235 * out of our timeout. 236 */ 237 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 238 struct scb *list_scb; 239 240 /* 241 * We were able to complete the command successfully, 242 * so reinstate the timeouts for all other pending 243 * commands. 244 */ 245 LIST_FOREACH(list_scb, &ahc->pending_scbs, pending_links) { 246 if (!(list_scb->xs->xs_control & XS_CTL_POLL)) { 247 callout_reset(&list_scb->xs->xs_callout, 248 (list_scb->xs->timeout > 1000000) ? 249 (list_scb->xs->timeout / 1000) * hz : 250 (list_scb->xs->timeout * hz) / 1000, 251 ahc_timeout, list_scb); 252 } 253 } 254 255 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 256 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 257 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 258 scsipi_printaddr(xs->xs_periph); 259 printf("%s: no longer in timeout, status = %x\n", 260 ahc_name(ahc), xs->status); 261 262 scsipi_channel_thaw(&ahc->sc_channel, 1); 263 if (ahc->features & AHC_TWIN) 264 scsipi_channel_thaw(&ahc->sc_channel_b, 1); 265 } 266 267 /* Don't clobber any existing error state */ 268 if (xs->error != XS_NOERROR) { 269 /* Don't clobber any existing error state */ 270 } else if ((scb->flags & SCB_SENSE) != 0) { 271 /* 272 * We performed autosense retrieval. 273 * 274 * Zero any sense not transferred by the 275 * device. The SCSI spec mandates that any 276 * untransferred data should be assumed to be 277 * zero. Complete the 'bounce' of sense information 278 * through buffers accessible via bus-space by 279 * copying it into the clients csio. 280 */ 281 memset(&xs->sense.scsi_sense, 0, sizeof(xs->sense.scsi_sense)); 282 memcpy(&xs->sense.scsi_sense, 283 ahc_get_sense_buf(ahc, scb), 284 sizeof(xs->sense.scsi_sense)); 285 xs->error = XS_SENSE; 286 } 287 if (scb->flags & SCB_FREEZE_QUEUE) { 288 scsipi_periph_thaw(periph, 1); 289 scb->flags &= ~SCB_FREEZE_QUEUE; 290 } 291 292 ahc_lock(ahc, &s); 293 ahc_free_scb(ahc, scb); 294 ahc_unlock(ahc, &s); 295 296 scsipi_done(xs); 297 } 298 299 static int 300 ahc_ioctl(struct scsipi_channel *channel, u_long cmd, void *addr, 301 int flag, struct proc *p) 302 { 303 struct ahc_softc *ahc; 304 int s, ret = ENOTTY; 305 306 ahc = device_private(channel->chan_adapter->adapt_dev); 307 308 switch (cmd) { 309 case SCBUSIORESET: 310 s = splbio(); 311 ahc_reset_channel(ahc, channel->chan_channel == 1 ? 'B' : 'A', 312 TRUE); 313 splx(s); 314 ret = 0; 315 break; 316 default: 317 break; 318 } 319 320 return ret; 321 } 322 323 static void 324 ahc_action(struct scsipi_channel *chan, scsipi_adapter_req_t req, void *arg) 325 { 326 struct ahc_softc *ahc; 327 int s; 328 struct ahc_initiator_tinfo *tinfo; 329 struct ahc_tmode_tstate *tstate; 330 331 ahc = device_private(chan->chan_adapter->adapt_dev); 332 333 switch (req) { 334 335 case ADAPTER_REQ_RUN_XFER: 336 { 337 struct scsipi_xfer *xs; 338 struct scsipi_periph *periph; 339 struct scb *scb; 340 struct hardware_scb *hscb; 341 u_int target_id; 342 u_int our_id; 343 u_long ss; 344 345 xs = arg; 346 periph = xs->xs_periph; 347 348 target_id = periph->periph_target; 349 our_id = ahc->our_id; 350 351 SC_DEBUG(xs->xs_periph, SCSIPI_DB3, ("ahc_action\n")); 352 353 /* 354 * get an scb to use. 355 */ 356 ahc_lock(ahc, &ss); 357 if ((scb = ahc_get_scb(ahc)) == NULL) { 358 xs->error = XS_RESOURCE_SHORTAGE; 359 ahc_unlock(ahc, &ss); 360 scsipi_done(xs); 361 return; 362 } 363 ahc_unlock(ahc, &ss); 364 365 hscb = scb->hscb; 366 367 SC_DEBUG(periph, SCSIPI_DB3, ("start scb(%p)\n", scb)); 368 scb->xs = xs; 369 370 /* 371 * Put all the arguments for the xfer in the scb 372 */ 373 hscb->control = 0; 374 hscb->scsiid = BUILD_SCSIID(ahc, 0, target_id, our_id); 375 hscb->lun = periph->periph_lun; 376 if (xs->xs_control & XS_CTL_RESET) { 377 hscb->cdb_len = 0; 378 scb->flags |= SCB_DEVICE_RESET; 379 hscb->control |= MK_MESSAGE; 380 ahc_execute_scb(scb, NULL, 0); 381 } 382 383 ahc_setup_data(ahc, xs, scb); 384 385 break; 386 } 387 case ADAPTER_REQ_GROW_RESOURCES: 388 #ifdef AHC_DEBUG 389 printf("%s: ADAPTER_REQ_GROW_RESOURCES\n", ahc_name(ahc)); 390 #endif 391 chan->chan_adapter->adapt_openings += ahc_alloc_scbs(ahc); 392 if (ahc->scb_data->numscbs >= AHC_SCB_MAX_ALLOC) 393 chan->chan_flags &= ~SCSIPI_CHAN_CANGROW; 394 return; 395 396 case ADAPTER_REQ_SET_XFER_MODE: 397 { 398 struct scsipi_xfer_mode *xm = arg; 399 struct ahc_devinfo devinfo; 400 int target_id, our_id, first; 401 u_int width; 402 char channel; 403 u_int ppr_options = 0, period, offset; 404 struct ahc_syncrate *syncrate; 405 uint16_t old_autoneg; 406 407 target_id = xm->xm_target; 408 our_id = chan->chan_id; 409 channel = (chan->chan_channel == 1) ? 'B' : 'A'; 410 s = splbio(); 411 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, target_id, 412 &tstate); 413 ahc_compile_devinfo(&devinfo, our_id, target_id, 414 0, channel, ROLE_INITIATOR); 415 416 old_autoneg = tstate->auto_negotiate; 417 418 /* 419 * XXX since the period and offset are not provided here, 420 * fake things by forcing a renegotiation using the user 421 * settings if this is called for the first time (i.e. 422 * during probe). Also, cap various values at the user 423 * values, assuming that the user set it up that way. 424 */ 425 if (ahc->inited_target[target_id] == 0) { 426 period = tinfo->user.period; 427 offset = tinfo->user.offset; 428 ppr_options = tinfo->user.ppr_options; 429 width = tinfo->user.width; 430 tstate->tagenable |= 431 (ahc->user_tagenable & devinfo.target_mask); 432 tstate->discenable |= 433 (ahc->user_discenable & devinfo.target_mask); 434 ahc->inited_target[target_id] = 1; 435 first = 1; 436 } else 437 first = 0; 438 439 if (xm->xm_mode & (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT)) 440 width = MSG_EXT_WDTR_BUS_16_BIT; 441 else 442 width = MSG_EXT_WDTR_BUS_8_BIT; 443 444 ahc_validate_width(ahc, NULL, &width, ROLE_UNKNOWN); 445 if (width > tinfo->user.width) 446 width = tinfo->user.width; 447 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 448 449 if (!(xm->xm_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT))) { 450 period = 0; 451 offset = 0; 452 ppr_options = 0; 453 } 454 455 if ((xm->xm_mode & PERIPH_CAP_DT) && 456 (ppr_options & MSG_EXT_PPR_DT_REQ)) 457 ppr_options |= MSG_EXT_PPR_DT_REQ; 458 else 459 ppr_options &= ~MSG_EXT_PPR_DT_REQ; 460 if ((tstate->discenable & devinfo.target_mask) == 0 || 461 (tstate->tagenable & devinfo.target_mask) == 0) 462 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 463 464 if ((xm->xm_mode & PERIPH_CAP_TQING) && 465 (ahc->user_tagenable & devinfo.target_mask)) 466 tstate->tagenable |= devinfo.target_mask; 467 else 468 tstate->tagenable &= ~devinfo.target_mask; 469 470 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, 471 AHC_SYNCRATE_MAX); 472 ahc_validate_offset(ahc, NULL, syncrate, &offset, 473 width, ROLE_UNKNOWN); 474 475 if (offset == 0) { 476 period = 0; 477 ppr_options = 0; 478 } 479 480 if (ppr_options != 0 481 && tinfo->user.transport_version >= 3) { 482 tinfo->goal.transport_version = 483 tinfo->user.transport_version; 484 tinfo->curr.transport_version = 485 tinfo->user.transport_version; 486 } 487 488 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 489 ppr_options, AHC_TRANS_GOAL, FALSE); 490 491 /* 492 * If this is the first request, and no negotiation is 493 * needed, just confirm the state to the scsipi layer, 494 * so that it can print a message. 495 */ 496 if (old_autoneg == tstate->auto_negotiate && first) { 497 xm->xm_mode = 0; 498 xm->xm_period = tinfo->curr.period; 499 xm->xm_offset = tinfo->curr.offset; 500 if (tinfo->curr.width == MSG_EXT_WDTR_BUS_16_BIT) 501 xm->xm_mode |= PERIPH_CAP_WIDE16; 502 if (tinfo->curr.period) 503 xm->xm_mode |= PERIPH_CAP_SYNC; 504 if (tstate->tagenable & devinfo.target_mask) 505 xm->xm_mode |= PERIPH_CAP_TQING; 506 if (tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ) 507 xm->xm_mode |= PERIPH_CAP_DT; 508 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm); 509 } 510 splx(s); 511 } 512 } 513 514 return; 515 } 516 517 static void 518 ahc_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nsegments) 519 { 520 struct scb *scb; 521 struct scsipi_xfer *xs; 522 struct ahc_softc *ahc; 523 struct ahc_initiator_tinfo *tinfo; 524 struct ahc_tmode_tstate *tstate; 525 526 u_int mask; 527 u_long s; 528 529 scb = (struct scb *)arg; 530 xs = scb->xs; 531 xs->error = 0; 532 xs->status = 0; 533 xs->xs_status = 0; 534 ahc = device_private( 535 xs->xs_periph->periph_channel->chan_adapter->adapt_dev); 536 537 if (nsegments != 0) { 538 struct ahc_dma_seg *sg; 539 bus_dma_segment_t *end_seg; 540 int op; 541 542 end_seg = dm_segs + nsegments; 543 544 /* Copy the segments into our SG list */ 545 sg = scb->sg_list; 546 while (dm_segs < end_seg) { 547 uint32_t len; 548 549 sg->addr = ahc_htole32(dm_segs->ds_addr); 550 len = dm_segs->ds_len 551 | ((dm_segs->ds_addr >> 8) & AHC_SG_HIGH_ADDR_MASK); 552 sg->len = ahc_htole32(len); 553 sg++; 554 dm_segs++; 555 } 556 557 /* 558 * Note where to find the SG entries in bus space. 559 * We also set the full residual flag which the 560 * sequencer will clear as soon as a data transfer 561 * occurs. 562 */ 563 scb->hscb->sgptr = ahc_htole32(scb->sg_list_phys|SG_FULL_RESID); 564 565 if (xs->xs_control & XS_CTL_DATA_IN) 566 op = BUS_DMASYNC_PREREAD; 567 else 568 op = BUS_DMASYNC_PREWRITE; 569 570 bus_dmamap_sync(ahc->parent_dmat, scb->dmamap, 0, 571 scb->dmamap->dm_mapsize, op); 572 573 sg--; 574 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 575 576 /* Copy the first SG into the "current" data pointer area */ 577 scb->hscb->dataptr = scb->sg_list->addr; 578 scb->hscb->datacnt = scb->sg_list->len; 579 } else { 580 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 581 scb->hscb->dataptr = 0; 582 scb->hscb->datacnt = 0; 583 } 584 585 scb->sg_count = nsegments; 586 587 ahc_lock(ahc, &s); 588 589 /* 590 * Last time we need to check if this SCB needs to 591 * be aborted. 592 */ 593 if (xs->xs_status & XS_STS_DONE) { 594 if (nsegments != 0) 595 bus_dmamap_unload(ahc->buffer_dmat, scb->dmamap); 596 ahc_free_scb(ahc, scb); 597 ahc_unlock(ahc, &s); 598 scsipi_done(xs); 599 return; 600 } 601 602 tinfo = ahc_fetch_transinfo(ahc, ahc->channel, 603 SCSIID_OUR_ID(scb->hscb->scsiid), 604 SCSIID_TARGET(ahc, scb->hscb->scsiid), 605 &tstate); 606 607 mask = SCB_GET_TARGET_MASK(ahc, scb); 608 scb->hscb->scsirate = tinfo->scsirate; 609 scb->hscb->scsioffset = tinfo->curr.offset; 610 611 if ((tstate->ultraenb & mask) != 0) 612 scb->hscb->control |= ULTRAENB; 613 614 if ((tstate->discenable & mask) != 0) 615 scb->hscb->control |= DISCENB; 616 617 if (xs->xs_tag_type) 618 scb->hscb->control |= xs->xs_tag_type; 619 620 #if 1 /* This looks like it makes sense at first, but it can loop */ 621 if ((xs->xs_control & XS_CTL_DISCOVERY) && (tinfo->goal.width == 0 622 && tinfo->goal.offset == 0 623 && tinfo->goal.ppr_options == 0)) { 624 scb->flags |= SCB_NEGOTIATE; 625 scb->hscb->control |= MK_MESSAGE; 626 } else 627 #endif 628 if ((tstate->auto_negotiate & mask) != 0) { 629 scb->flags |= SCB_AUTO_NEGOTIATE; 630 scb->hscb->control |= MK_MESSAGE; 631 } 632 633 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 634 635 if (!(xs->xs_control & XS_CTL_POLL)) { 636 callout_reset(&scb->xs->xs_callout, xs->timeout > 1000000 ? 637 (xs->timeout / 1000) * hz : (xs->timeout * hz) / 1000, 638 ahc_timeout, scb); 639 } 640 641 /* 642 * We only allow one untagged transaction 643 * per target in the initiator role unless 644 * we are storing a full busy target *lun* 645 * table in SCB space. 646 */ 647 if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0 648 && (ahc->flags & AHC_SCB_BTT) == 0) { 649 struct scb_tailq *untagged_q; 650 int target_offset; 651 652 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 653 untagged_q = &(ahc->untagged_queues[target_offset]); 654 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 655 scb->flags |= SCB_UNTAGGEDQ; 656 if (TAILQ_FIRST(untagged_q) != scb) { 657 ahc_unlock(ahc, &s); 658 return; 659 } 660 } 661 scb->flags |= SCB_ACTIVE; 662 663 if ((scb->flags & SCB_TARGET_IMMEDIATE) != 0) { 664 /* Define a mapping from our tag to the SCB. */ 665 ahc->scb_data->scbindex[scb->hscb->tag] = scb; 666 ahc_pause(ahc); 667 if ((ahc->flags & AHC_PAGESCBS) == 0) 668 ahc_outb(ahc, SCBPTR, scb->hscb->tag); 669 ahc_outb(ahc, TARG_IMMEDIATE_SCB, scb->hscb->tag); 670 ahc_unpause(ahc); 671 } else { 672 ahc_queue_scb(ahc, scb); 673 } 674 675 if (!(xs->xs_control & XS_CTL_POLL)) { 676 ahc_unlock(ahc, &s); 677 return; 678 } 679 680 /* 681 * If we can't use interrupts, poll for completion 682 */ 683 684 SC_DEBUG(xs->xs_periph, SCSIPI_DB3, ("cmd_poll\n")); 685 do { 686 if (ahc_poll(ahc, xs->timeout)) { 687 if (!(xs->xs_control & XS_CTL_SILENT)) 688 printf("cmd fail\n"); 689 ahc_timeout(scb); 690 break; 691 } 692 } while (!(xs->xs_status & XS_STS_DONE)); 693 ahc_unlock(ahc, &s); 694 695 return; 696 } 697 698 static int 699 ahc_poll(struct ahc_softc *ahc, int wait) 700 { 701 while (--wait) { 702 DELAY(1000); 703 if (ahc_inb(ahc, INTSTAT) & INT_PEND) 704 break; 705 } 706 707 if (wait == 0) { 708 printf("%s: board is not responding\n", ahc_name(ahc)); 709 return (EIO); 710 } 711 712 ahc_intr(ahc); 713 return (0); 714 } 715 716 static void 717 ahc_setup_data(struct ahc_softc *ahc, struct scsipi_xfer *xs, 718 struct scb *scb) 719 { 720 struct hardware_scb *hscb; 721 722 hscb = scb->hscb; 723 xs->resid = xs->status = 0; 724 725 hscb->cdb_len = xs->cmdlen; 726 if (hscb->cdb_len > sizeof(hscb->cdb32)) { 727 u_long s; 728 729 ahc_set_transaction_status(scb, CAM_REQ_INVALID); 730 ahc_lock(ahc, &s); 731 ahc_free_scb(ahc, scb); 732 ahc_unlock(ahc, &s); 733 scsipi_done(xs); 734 return; 735 } 736 737 if (hscb->cdb_len > 12) { 738 memcpy(hscb->cdb32, xs->cmd, hscb->cdb_len); 739 scb->flags |= SCB_CDB32_PTR; 740 } else { 741 memcpy(hscb->shared_data.cdb, xs->cmd, hscb->cdb_len); 742 } 743 744 /* Only use S/G if there is a transfer */ 745 if (xs->datalen) { 746 int error; 747 748 error = bus_dmamap_load(ahc->parent_dmat, 749 scb->dmamap, xs->data, 750 xs->datalen, NULL, 751 ((xs->xs_control & XS_CTL_NOSLEEP) ? 752 BUS_DMA_NOWAIT : BUS_DMA_WAITOK) | 753 BUS_DMA_STREAMING | 754 ((xs->xs_control & XS_CTL_DATA_IN) ? 755 BUS_DMA_READ : BUS_DMA_WRITE)); 756 if (error) { 757 #ifdef AHC_DEBUG 758 printf("%s: in ahc_setup_data(): bus_dmamap_load() " 759 "= %d\n", 760 ahc_name(ahc), error); 761 #endif 762 xs->error = XS_RESOURCE_SHORTAGE; 763 scsipi_done(xs); 764 return; 765 } 766 ahc_execute_scb(scb, 767 scb->dmamap->dm_segs, 768 scb->dmamap->dm_nsegs); 769 } else { 770 ahc_execute_scb(scb, NULL, 0); 771 } 772 } 773 774 static void 775 ahc_set_recoveryscb(struct ahc_softc *ahc, struct scb *scb) { 776 777 if ((scb->flags & SCB_RECOVERY_SCB) == 0) { 778 struct scb *list_scb; 779 780 scb->flags |= SCB_RECOVERY_SCB; 781 782 /* 783 * Take all queued, but not sent SCBs out of the equation. 784 * Also ensure that no new CCBs are queued to us while we 785 * try to fix this problem. 786 */ 787 scsipi_channel_freeze(&ahc->sc_channel, 1); 788 if (ahc->features & AHC_TWIN) 789 scsipi_channel_freeze(&ahc->sc_channel_b, 1); 790 791 /* 792 * Go through all of our pending SCBs and remove 793 * any scheduled timeouts for them. We will reschedule 794 * them after we've successfully fixed this problem. 795 */ 796 LIST_FOREACH(list_scb, &ahc->pending_scbs, pending_links) { 797 callout_stop(&list_scb->xs->xs_callout); 798 } 799 } 800 } 801 802 void 803 ahc_timeout(void *arg) 804 { 805 struct scb *scb; 806 struct ahc_softc *ahc; 807 u_long s; 808 int found; 809 u_int last_phase; 810 int target; 811 int lun; 812 int i; 813 char channel; 814 815 scb = arg; 816 ahc = scb->ahc_softc; 817 818 ahc_lock(ahc, &s); 819 820 ahc_pause_and_flushwork(ahc); 821 822 if ((scb->flags & SCB_ACTIVE) == 0) { 823 /* Previous timeout took care of me already */ 824 printf("%s: Timedout SCB already complete. " 825 "Interrupts may not be functioning.\n", ahc_name(ahc)); 826 ahc_unpause(ahc); 827 ahc_unlock(ahc, &s); 828 return; 829 } 830 831 target = SCB_GET_TARGET(ahc, scb); 832 channel = SCB_GET_CHANNEL(ahc, scb); 833 lun = SCB_GET_LUN(scb); 834 835 ahc_print_path(ahc, scb); 836 printf("SCB 0x%x - timed out\n", scb->hscb->tag); 837 ahc_dump_card_state(ahc); 838 last_phase = ahc_inb(ahc, LASTPHASE); 839 if (scb->sg_count > 0) { 840 for (i = 0; i < scb->sg_count; i++) { 841 printf("sg[%d] - Addr 0x%x : Length %d\n", 842 i, 843 scb->sg_list[i].addr, 844 scb->sg_list[i].len & AHC_SG_LEN_MASK); 845 } 846 } 847 if (scb->flags & (SCB_DEVICE_RESET|SCB_ABORT)) { 848 /* 849 * Been down this road before. 850 * Do a full bus reset. 851 */ 852 bus_reset: 853 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 854 found = ahc_reset_channel(ahc, channel, /*Initiate Reset*/TRUE); 855 printf("%s: Issued Channel %c Bus Reset. " 856 "%d SCBs aborted\n", ahc_name(ahc), channel, found); 857 } else { 858 /* 859 * If we are a target, transition to bus free and report 860 * the timeout. 861 * 862 * The target/initiator that is holding up the bus may not 863 * be the same as the one that triggered this timeout 864 * (different commands have different timeout lengths). 865 * If the bus is idle and we are acting as the initiator 866 * for this request, queue a BDR message to the timed out 867 * target. Otherwise, if the timed out transaction is 868 * active: 869 * Initiator transaction: 870 * Stuff the message buffer with a BDR message and assert 871 * ATN in the hopes that the target will let go of the bus 872 * and go to the mesgout phase. If this fails, we'll 873 * get another timeout 2 seconds later which will attempt 874 * a bus reset. 875 * 876 * Target transaction: 877 * Transition to BUS FREE and report the error. 878 * It's good to be the target! 879 */ 880 u_int active_scb_index; 881 u_int saved_scbptr; 882 883 saved_scbptr = ahc_inb(ahc, SCBPTR); 884 active_scb_index = ahc_inb(ahc, SCB_TAG); 885 886 if ((ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0 887 && (active_scb_index < ahc->scb_data->numscbs)) { 888 struct scb *active_scb; 889 890 /* 891 * If the active SCB is not us, assume that 892 * the active SCB has a longer timeout than 893 * the timedout SCB, and wait for the active 894 * SCB to timeout. 895 */ 896 active_scb = ahc_lookup_scb(ahc, active_scb_index); 897 if (active_scb != scb) { 898 uint64_t newtimeout; 899 900 ahc_print_path(ahc, scb); 901 printf("Other SCB Timeout%s", 902 (scb->flags & SCB_OTHERTCL_TIMEOUT) != 0 903 ? " again\n" : "\n"); 904 scb->flags |= SCB_OTHERTCL_TIMEOUT; 905 newtimeout = MAX(active_scb->xs->timeout, 906 scb->xs->timeout); 907 callout_reset(&scb->xs->xs_callout, 908 newtimeout > 1000000 ? 909 (newtimeout / 1000) * hz : 910 (newtimeout * hz) / 1000, 911 ahc_timeout, scb); 912 ahc_unpause(ahc); 913 ahc_unlock(ahc, &s); 914 return; 915 } 916 917 /* It's us */ 918 if ((scb->flags & SCB_TARGET_SCB) != 0) { 919 920 /* 921 * Send back any queued up transactions 922 * and properly record the error condition. 923 */ 924 ahc_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 925 SCB_GET_CHANNEL(ahc, scb), 926 SCB_GET_LUN(scb), 927 scb->hscb->tag, 928 ROLE_TARGET, 929 CAM_CMD_TIMEOUT); 930 931 /* Will clear us from the bus */ 932 ahc_restart(ahc); 933 ahc_unlock(ahc, &s); 934 return; 935 } 936 937 ahc_set_recoveryscb(ahc, active_scb); 938 ahc_outb(ahc, MSG_OUT, HOST_MSG); 939 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 940 ahc_print_path(ahc, active_scb); 941 printf("BDR message in message buffer\n"); 942 active_scb->flags |= SCB_DEVICE_RESET; 943 callout_reset(&active_scb->xs->xs_callout, 944 2 * hz, ahc_timeout, active_scb); 945 ahc_unpause(ahc); 946 } else { 947 int disconnected; 948 949 /* XXX Shouldn't panic. Just punt instead? */ 950 if ((scb->flags & SCB_TARGET_SCB) != 0) 951 panic("Timed-out target SCB but bus idle"); 952 953 if (last_phase != P_BUSFREE 954 && (ahc_inb(ahc, SSTAT0) & TARGET) != 0) { 955 /* XXX What happened to the SCB? */ 956 /* Hung target selection. Goto busfree */ 957 printf("%s: Hung target selection\n", 958 ahc_name(ahc)); 959 ahc_restart(ahc); 960 ahc_unlock(ahc, &s); 961 return; 962 } 963 964 if (ahc_search_qinfifo(ahc, target, channel, lun, 965 scb->hscb->tag, ROLE_INITIATOR, 966 /*status*/0, SEARCH_COUNT) > 0) { 967 disconnected = FALSE; 968 } else { 969 disconnected = TRUE; 970 } 971 972 if (disconnected) { 973 974 ahc_set_recoveryscb(ahc, scb); 975 /* 976 * Actually re-queue this SCB in an attempt 977 * to select the device before it reconnects. 978 * In either case (selection or reselection), 979 * we will now issue a target reset to the 980 * timed-out device. 981 * 982 * Set the MK_MESSAGE control bit indicating 983 * that we desire to send a message. We 984 * also set the disconnected flag since 985 * in the paging case there is no guarantee 986 * that our SCB control byte matches the 987 * version on the card. We don't want the 988 * sequencer to abort the command thinking 989 * an unsolicited reselection occurred. 990 */ 991 scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 992 scb->flags |= SCB_DEVICE_RESET; 993 994 /* 995 * Remove any cached copy of this SCB in the 996 * disconnected list in preparation for the 997 * queuing of our abort SCB. We use the 998 * same element in the SCB, SCB_NEXT, for 999 * both the qinfifo and the disconnected list. 1000 */ 1001 ahc_search_disc_list(ahc, target, channel, 1002 lun, scb->hscb->tag, 1003 /*stop_on_first*/TRUE, 1004 /*remove*/TRUE, 1005 /*save_state*/FALSE); 1006 1007 /* 1008 * In the non-paging case, the sequencer will 1009 * never re-reference the in-core SCB. 1010 * To make sure we are notified during 1011 * reselection, set the MK_MESSAGE flag in 1012 * the card's copy of the SCB. 1013 */ 1014 if ((ahc->flags & AHC_PAGESCBS) == 0) { 1015 ahc_outb(ahc, SCBPTR, scb->hscb->tag); 1016 ahc_outb(ahc, SCB_CONTROL, 1017 ahc_inb(ahc, SCB_CONTROL) 1018 | MK_MESSAGE); 1019 } 1020 1021 /* 1022 * Clear out any entries in the QINFIFO first 1023 * so we are the next SCB for this target 1024 * to run. 1025 */ 1026 ahc_search_qinfifo(ahc, 1027 SCB_GET_TARGET(ahc, scb), 1028 channel, SCB_GET_LUN(scb), 1029 SCB_LIST_NULL, 1030 ROLE_INITIATOR, 1031 CAM_REQUEUE_REQ, 1032 SEARCH_COMPLETE); 1033 ahc_print_path(ahc, scb); 1034 printf("Queuing a BDR SCB\n"); 1035 ahc_qinfifo_requeue_tail(ahc, scb); 1036 ahc_outb(ahc, SCBPTR, saved_scbptr); 1037 callout_reset(&scb->xs->xs_callout, 2 * hz, 1038 ahc_timeout, scb); 1039 ahc_unpause(ahc); 1040 } else { 1041 /* Go "immediately" to the bus reset */ 1042 /* This shouldn't happen */ 1043 ahc_set_recoveryscb(ahc, scb); 1044 ahc_print_path(ahc, scb); 1045 printf("SCB %d: Immediate reset. " 1046 "Flags = 0x%x\n", scb->hscb->tag, 1047 scb->flags); 1048 goto bus_reset; 1049 } 1050 } 1051 } 1052 ahc_unlock(ahc, &s); 1053 } 1054 1055 void 1056 ahc_platform_set_tags(struct ahc_softc *ahc, 1057 struct ahc_devinfo *devinfo, int enable) 1058 { 1059 struct ahc_tmode_tstate *tstate; 1060 1061 ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, 1062 devinfo->target, &tstate); 1063 1064 if (enable) 1065 tstate->tagenable |= devinfo->target_mask; 1066 else 1067 tstate->tagenable &= ~devinfo->target_mask; 1068 } 1069 1070 int 1071 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1072 { 1073 if (sizeof(struct ahc_platform_data) == 0) 1074 return 0; 1075 ahc->platform_data = malloc(sizeof(struct ahc_platform_data), M_DEVBUF, 1076 M_WAITOK); 1077 return (0); 1078 } 1079 1080 void 1081 ahc_platform_free(struct ahc_softc *ahc) 1082 { 1083 if (sizeof(struct ahc_platform_data) == 0) 1084 return; 1085 free(ahc->platform_data, M_DEVBUF); 1086 } 1087 1088 int 1089 ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc) 1090 { 1091 return (0); 1092 } 1093 1094 int 1095 ahc_detach(struct ahc_softc *ahc, int flags) 1096 { 1097 int rv = 0; 1098 1099 ahc_intr_enable(ahc, FALSE); 1100 if (ahc->sc_child != NULL) 1101 rv = config_detach(ahc->sc_child, flags); 1102 if (rv == 0 && ahc->sc_child_b != NULL) 1103 rv = config_detach(ahc->sc_child_b, flags); 1104 1105 pmf_device_deregister(ahc->sc_dev); 1106 ahc_free(ahc); 1107 1108 return (rv); 1109 } 1110 1111 1112 void 1113 ahc_send_async(struct ahc_softc *ahc, char channel, u_int target, u_int lun, 1114 ac_code code, void *opt_arg) 1115 { 1116 struct ahc_tmode_tstate *tstate; 1117 struct ahc_initiator_tinfo *tinfo; 1118 struct ahc_devinfo devinfo; 1119 struct scsipi_channel *chan; 1120 struct scsipi_xfer_mode xm; 1121 1122 chan = channel == 'B' ? &ahc->sc_channel_b : &ahc->sc_channel; 1123 switch (code) { 1124 case AC_TRANSFER_NEG: 1125 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, target, 1126 &tstate); 1127 ahc_compile_devinfo(&devinfo, ahc->our_id, target, lun, 1128 channel, ROLE_UNKNOWN); 1129 /* 1130 * Don't bother if negotiating. XXX? 1131 */ 1132 if (tinfo->curr.period != tinfo->goal.period 1133 || tinfo->curr.width != tinfo->goal.width 1134 || tinfo->curr.offset != tinfo->goal.offset 1135 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1136 break; 1137 xm.xm_target = target; 1138 xm.xm_mode = 0; 1139 xm.xm_period = tinfo->curr.period; 1140 xm.xm_offset = tinfo->curr.offset; 1141 if (tinfo->curr.width == MSG_EXT_WDTR_BUS_16_BIT) 1142 xm.xm_mode |= PERIPH_CAP_WIDE16; 1143 if (tinfo->curr.period) 1144 xm.xm_mode |= PERIPH_CAP_SYNC; 1145 if (tstate->tagenable & devinfo.target_mask) 1146 xm.xm_mode |= PERIPH_CAP_TQING; 1147 if (tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ) 1148 xm.xm_mode |= PERIPH_CAP_DT; 1149 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, &xm); 1150 break; 1151 case AC_BUS_RESET: 1152 scsipi_async_event(chan, ASYNC_EVENT_RESET, NULL); 1153 case AC_SENT_BDR: 1154 default: 1155 break; 1156 } 1157 } 1158
Indexes created Sun Sep 21 20:09:37 GMT 2025