sys/dev/disk/aic/aic.c

   1 /*-
   2  * Copyright (c) 1999 Luoqi Chen.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/aic/aic.c,v 1.8 2000/01/14 23:42:35 imp Exp $
  27  * $DragonFly: src/sys/dev/disk/aic/aic.c,v 1.14 2008/05/18 20:30:21 pavalos Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/bus.h>
  34 #include <sys/thread2.h>
  35
  36 #include <bus/cam/cam.h>
  37 #include <bus/cam/cam_ccb.h>
  38 #include <bus/cam/cam_sim.h>
  39 #include <bus/cam/cam_xpt_sim.h>
  40 #include <bus/cam/cam_debug.h>
  41
  42 #include <bus/cam/scsi/scsi_message.h>
  43
  44 #include "aic6360reg.h"
  45 #include "aicvar.h"
  46
  47 static void aic_action (struct cam_sim *sim, union ccb *ccb);
  48 static void aic_execute_scb (void *arg, bus_dma_segment_t *dm_segs,
  49                                 int nseg, int error);
  50 static void aic_start (struct aic_softc *aic);
  51 static void aic_select (struct aic_softc *aic);
  52 static void aic_selected (struct aic_softc *aic);
  53 static void aic_reselected (struct aic_softc *aic);
  54 static void aic_reconnect (struct aic_softc *aic, int tag);
  55 static void aic_cmd (struct aic_softc *aic);
  56 static void aic_msgin (struct aic_softc *aic);
  57 static void aic_handle_msgin (struct aic_softc *aic);
  58 static void aic_msgout (struct aic_softc *aic);
  59 static void aic_datain (struct aic_softc *aic);
  60 static void aic_dataout (struct aic_softc *aic);
  61 static void aic_done (struct aic_softc *aic, struct aic_scb *scb);
  62 static void aic_poll (struct cam_sim *sim);
  63 static void aic_timeout (void *arg);
  64 static void aic_scsi_reset (struct aic_softc *aic);
  65 static void aic_chip_reset (struct aic_softc *aic);
  66 static void aic_reset (struct aic_softc *aic, int initiate_reset);
  67
  68 devclass_t aic_devclass;
  69
  70 static struct aic_scb *free_scbs;
  71
  72 static struct aic_scb *
  73 aic_get_scb(struct aic_softc *aic)
  74 {
  75         struct aic_scb *scb;
  76
  77         crit_enter();
  78
  79         if ((scb = free_scbs) != NULL)
  80                 free_scbs = (struct aic_scb *)free_scbs->ccb;
  81
  82         crit_exit();
  83         return (scb);
  84 }
  85
  86 static void
  87 aic_free_scb(struct aic_softc *aic, struct aic_scb *scb)
  88 {
  89         crit_enter();
  90
  91         if ((aic->flags & AIC_RESOURCE_SHORTAGE) != 0 &&
  92             (scb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
  93                 scb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  94                 aic->flags &= ~AIC_RESOURCE_SHORTAGE;
  95         }
  96         scb->flags = 0;
  97         scb->ccb = (union ccb *)free_scbs;
  98         free_scbs = scb;
  99
 100         crit_exit();
 101 }
 102
 103 static void
 104 aic_action(struct cam_sim *sim, union ccb *ccb)
 105 {
 106         struct aic_softc *aic;
 107
 108         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("aic_action\n"));
 109
 110         aic = (struct aic_softc *)cam_sim_softc(sim);
 111
 112         switch (ccb->ccb_h.func_code) {
 113         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 114         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 115         {
 116                 struct aic_scb *scb;
 117
 118                 if ((scb = aic_get_scb(aic)) == NULL) {
 119                         crit_enter();
 120                         aic->flags |= AIC_RESOURCE_SHORTAGE;
 121                         crit_exit();
 122                         xpt_freeze_simq(aic->sim, /*count*/1);
 123                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 124                         xpt_done(ccb);
 125                         return;
 126                 }
 127
 128                 scb->ccb = ccb;
 129                 ccb->ccb_h.ccb_scb_ptr = scb;
 130                 ccb->ccb_h.ccb_aic_ptr = aic;
 131
 132                 scb->target = ccb->ccb_h.target_id;
 133                 scb->lun = ccb->ccb_h.target_lun;
 134
 135                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
 136                         scb->cmd_len = ccb->csio.cdb_len;
 137                         if (ccb->ccb_h.flags & CAM_CDB_POINTER) {
 138                                 if (ccb->ccb_h.flags & CAM_CDB_PHYS) {
 139                                         ccb->ccb_h.status = CAM_REQ_INVALID;
 140                                         aic_free_scb(aic, scb);
 141                                         xpt_done(ccb);
 142                                         return;
 143                                 }
 144                                 scb->cmd_ptr = ccb->csio.cdb_io.cdb_ptr;
 145                         } else {
 146                                 scb->cmd_ptr = ccb->csio.cdb_io.cdb_bytes;
 147                         }
 148                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 149                                 if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) ||
 150                                     (ccb->ccb_h.flags & CAM_DATA_PHYS)) {
 151                                         ccb->ccb_h.status = CAM_REQ_INVALID;
 152                                         aic_free_scb(aic, scb);
 153                                         xpt_done(ccb);
 154                                         return;
 155                                 }
 156                                 scb->data_ptr = ccb->csio.data_ptr;
 157                                 scb->data_len = ccb->csio.dxfer_len;
 158                         } else {
 159                                 scb->data_ptr = NULL;
 160                                 scb->data_len = 0;
 161                         }
 162                         aic_execute_scb(scb, NULL, 0, 0);
 163                 } else {
 164                         scb->flags |= SCB_DEVICE_RESET;
 165                         aic_execute_scb(scb, NULL, 0, 0);
 166                 }
 167                 break;
 168         }
 169         case XPT_SET_TRAN_SETTINGS:
 170         {
 171                 struct ccb_trans_settings *cts = cts = &ccb->cts;
 172                 struct aic_tinfo *ti = &aic->tinfo[ccb->ccb_h.target_id];
 173                 struct ccb_trans_settings_scsi *scsi =
 174                     &cts->proto_specific.scsi;
 175                 struct ccb_trans_settings_spi *spi =
 176                     &cts->xport_specific.spi;
 177
 178                 crit_enter();
 179
 180                 if ((spi->valid & CTS_SPI_VALID_DISC) != 0 &&
 181                     (aic->flags & AIC_DISC_ENABLE) != 0) {
 182                         if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) != 0)
 183                                 ti->flags |= TINFO_DISC_ENB;
 184                         else
 185                                 ti->flags &= ~TINFO_DISC_ENB;
 186                 }
 187
 188                 if ((scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
 189                         if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0)
 190                                 ti->flags |= TINFO_TAG_ENB;
 191                         else
 192                                 ti->flags &= ~TINFO_TAG_ENB;
 193                 }
 194
 195                 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) != 0) {
 196                         ti->goal.period = spi->sync_period;
 197
 198                         if (ti->goal.period > aic->min_period) {
 199                                 ti->goal.period = 0;
 200                                 ti->goal.offset = 0;
 201                         } else if (ti->goal.period < aic->max_period)
 202                                 ti->goal.period = aic->max_period;
 203                 }
 204
 205                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0) {
 206                         ti->goal.offset = spi->sync_offset;
 207                         if (ti->goal.offset == 0)
 208                                 ti->goal.period = 0;
 209                         else if (ti->goal.offset > AIC_SYNC_OFFSET)
 210                                 ti->goal.offset = AIC_SYNC_OFFSET;
 211                 }
 212
 213                 if ((ti->goal.period != ti->current.period)
 214                  || (ti->goal.offset != ti->current.offset))
 215                         ti->flags |= TINFO_SDTR_NEGO;
 216
 217                 crit_exit();
 218                 ccb->ccb_h.status = CAM_REQ_CMP;
 219                 xpt_done(ccb);
 220                 break;
 221         }
 222         case XPT_GET_TRAN_SETTINGS:
 223         {
 224                 struct ccb_trans_settings *cts = &ccb->cts;
 225                 struct aic_tinfo *ti = &aic->tinfo[ccb->ccb_h.target_id];
 226                 struct ccb_trans_settings_scsi *scsi =
 227                     &cts->proto_specific.scsi;
 228                 struct ccb_trans_settings_spi *spi =
 229                     &cts->xport_specific.spi;
 230
 231                 cts->protocol = PROTO_SCSI;
 232                 cts->protocol_version = SCSI_REV_2;
 233                 cts->transport = XPORT_SPI;
 234                 cts->transport_version = 2;
 235                 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
 236                 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
 237
 238                 crit_enter();
 239                 if ((ti->flags & TINFO_DISC_ENB) != 0)
 240                         spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
 241                 if ((ti->flags & TINFO_TAG_ENB) != 0)
 242                         scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
 243
 244                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
 245                         spi->sync_period = ti->current.period;
 246                         spi->sync_offset = ti->current.offset;
 247                 } else {
 248                         spi->sync_period = ti->user.period;
 249                         spi->sync_offset = ti->user.offset;
 250                 }
 251                 crit_exit();
 252
 253                 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 254                 spi->valid = CTS_SPI_VALID_SYNC_RATE
 255                            | CTS_SPI_VALID_SYNC_OFFSET
 256                            | CTS_SPI_VALID_BUS_WIDTH
 257                            | CTS_SPI_VALID_DISC;
 258                 scsi->valid = CTS_SCSI_VALID_TQ;
 259
 260                 ccb->ccb_h.status = CAM_REQ_CMP;
 261                 xpt_done(ccb);
 262                 break;
 263         }
 264         case XPT_CALC_GEOMETRY:
 265         {
 266                 cam_calc_geometry(&ccb->ccg, /*extended*/1);
 267                 xpt_done(ccb);
 268                 break;
 269         }
 270         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
 271                 aic_reset(aic, /*initiate_reset*/TRUE);
 272                 ccb->ccb_h.status = CAM_REQ_CMP;
 273                 xpt_done(ccb);
 274                 break;
 275         case XPT_PATH_INQ:              /* Path routing inquiry */
 276         {
 277                 struct ccb_pathinq *cpi = &ccb->cpi;
 278
 279                 cpi->version_num = 1; /* XXX??? */
 280                 cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE;
 281                 cpi->target_sprt = 0;
 282                 cpi->hba_misc = 0;
 283                 cpi->hba_eng_cnt = 0;
 284                 cpi->max_target = 7;
 285                 cpi->max_lun = 7;
 286                 cpi->initiator_id = aic->initiator;
 287                 cpi->bus_id = cam_sim_bus(sim);
 288                 cpi->base_transfer_speed = 3300;
 289                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 290                 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
 291                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 292                 cpi->unit_number = cam_sim_unit(sim);
 293                 cpi->transport = XPORT_SPI;
 294                 cpi->transport_version = 2;
 295                 cpi->protocol = PROTO_SCSI;
 296                 cpi->protocol_version = SCSI_REV_2;
 297                 cpi->ccb_h.status = CAM_REQ_CMP;
 298                 xpt_done(ccb);
 299                 break;
 300         }
 301         default:
 302                 ccb->ccb_h.status = CAM_REQ_INVALID;
 303                 xpt_done(ccb);
 304                 break;
 305         }
 306 }
 307
 308 static void
 309 aic_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 310 {
 311         struct aic_scb *scb = (struct aic_scb *)arg;
 312         union ccb *ccb = scb->ccb;
 313         struct aic_softc *aic = (struct aic_softc *)ccb->ccb_h.ccb_aic_ptr;
 314
 315         crit_enter();
 316
 317         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 318                 crit_exit();
 319                 aic_free_scb(aic, scb);
 320                 xpt_done(ccb);
 321                 return;
 322         }
 323
 324         scb->flags |= SCB_ACTIVE;
 325         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 326         TAILQ_INSERT_TAIL(&aic->pending_ccbs, &ccb->ccb_h, sim_links.tqe);
 327
 328         callout_reset(&ccb->ccb_h.timeout_ch, (ccb->ccb_h.timeout * hz) / 1000,
 329                       aic_timeout, scb);
 330
 331         aic_start(aic);
 332         crit_exit();
 333 }
 334
 335 /*
 336  * Start another command if the controller is not busy.
 337  */
 338 static void
 339 aic_start(struct aic_softc *aic)
 340 {
 341         struct ccb_hdr *ccb_h;
 342         struct aic_tinfo *ti;
 343
 344         if (aic->state != AIC_IDLE)
 345                 return;
 346
 347         TAILQ_FOREACH(ccb_h, &aic->pending_ccbs, sim_links.tqe) {
 348                 ti = &aic->tinfo[ccb_h->target_id];
 349                 if ((ti->lubusy & (1 << ccb_h->target_lun)) == 0) {
 350                         TAILQ_REMOVE(&aic->pending_ccbs, ccb_h, sim_links.tqe);
 351                         aic->nexus = (struct aic_scb *)ccb_h->ccb_scb_ptr;
 352                         aic_select(aic);
 353                         return;
 354                 }
 355         }
 356
 357         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_start: idle\n"));
 358
 359         aic_outb(aic, SIMODE0, ENSELDI);
 360         aic_outb(aic, SIMODE1, ENSCSIRST);
 361         aic_outb(aic, SCSISEQ, ENRESELI);
 362 }
 363
 364 /*
 365  * Start a selection.
 366  */
 367 static void
 368 aic_select(struct aic_softc *aic)
 369 {
 370         struct aic_scb *scb = aic->nexus;
 371
 372         CAM_DEBUG(scb->ccb->ccb_h.path, CAM_DEBUG_TRACE,
 373                   ("aic_select - ccb %p\n", scb->ccb));
 374
 375         aic->state = AIC_SELECTING;
 376
 377         aic_outb(aic, DMACNTRL1, 0);
 378         aic_outb(aic, SCSIID, aic->initiator << OID_S | scb->target);
 379         aic_outb(aic, SXFRCTL1, STIMO_256ms | ENSTIMER |
 380             (aic->flags & AIC_PARITY_ENABLE ? ENSPCHK : 0));
 381
 382         aic_outb(aic, SIMODE0, ENSELDI|ENSELDO);
 383         aic_outb(aic, SIMODE1, ENSCSIRST|ENSELTIMO);
 384         aic_outb(aic, SCSISEQ, ENRESELI|ENSELO|ENAUTOATNO);
 385 }
 386
 387 /*
 388  * We have successfully selected a target, prepare for the information
 389  * transfer phases.
 390  */
 391 static void
 392 aic_selected(struct aic_softc *aic)
 393 {
 394         struct aic_scb *scb = aic->nexus;
 395         union ccb *ccb = scb->ccb;
 396         struct aic_tinfo *ti = &aic->tinfo[scb->target];
 397
 398         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 399                   ("aic_selected - ccb %p\n", ccb));
 400
 401         aic->state = AIC_HASNEXUS;
 402
 403         if (scb->flags & SCB_DEVICE_RESET) {
 404                 aic->msg_buf[0] = MSG_BUS_DEV_RESET;
 405                 aic->msg_len = 1;
 406                 aic->msg_outq = AIC_MSG_MSGBUF;
 407         } else {
 408                 aic->msg_outq = AIC_MSG_IDENTIFY;
 409                 if ((ti->flags & TINFO_TAG_ENB) != 0 &&
 410                     (ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0)
 411                         aic->msg_outq |= AIC_MSG_TAG_Q;
 412                 else
 413                         ti->lubusy |= 1 << scb->lun;
 414                 if ((ti->flags & TINFO_SDTR_NEGO) != 0)
 415                         aic->msg_outq |= AIC_MSG_SDTR;
 416         }
 417
 418         aic_outb(aic, CLRSINT0, CLRSELDO);
 419         aic_outb(aic, CLRSINT1, CLRBUSFREE);
 420         aic_outb(aic, SCSISEQ, ENAUTOATNP);
 421         aic_outb(aic, SIMODE0, 0);
 422         aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
 423         aic_outb(aic, SCSIRATE, ti->scsirate);
 424 }
 425
 426 /*
 427  * We are re-selected by a target, save the target id and wait for the
 428  * target to further identify itself.
 429  */
 430 static void
 431 aic_reselected(struct aic_softc *aic)
 432 {
 433         u_int8_t selid;
 434
 435         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_reselected\n"));
 436
 437         /*
 438          * If we have started a selection, it must have lost out in
 439          * the arbitration, put the command back to the pending queue.
 440          */
 441         if (aic->nexus) {
 442                 TAILQ_INSERT_HEAD(&aic->pending_ccbs,
 443                     &aic->nexus->ccb->ccb_h, sim_links.tqe);
 444                 aic->nexus = NULL;
 445         }
 446
 447         selid = aic_inb(aic, SELID) & ~(1 << aic->initiator);
 448         if (selid & (selid - 1)) {
 449                 /* this should never have happened */
 450                 kprintf("aic_reselected: invalid selid %x\n", selid);
 451                 aic_reset(aic, /*initiate_reset*/TRUE);
 452                 return;
 453         }
 454
 455         aic->state = AIC_RESELECTED;
 456         aic->target = ffs(selid) - 1;
 457         aic->lun = -1;
 458
 459         aic_outb(aic, CLRSINT0, CLRSELDI);
 460         aic_outb(aic, CLRSINT1, CLRBUSFREE);
 461         aic_outb(aic, SIMODE0, 0);
 462         aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
 463         aic_outb(aic, SCSISEQ, ENAUTOATNP);
 464         aic_outb(aic, SCSIRATE, aic->tinfo[aic->target].scsirate);
 465 }
 466
 467 /*
 468  * Raise ATNO to signal the target that we have a message for it.
 469  */
 470 static __inline void
 471 aic_sched_msgout(struct aic_softc *aic, u_int8_t msg)
 472 {
 473         if (msg) {
 474                 aic->msg_buf[0] = msg;
 475                 aic->msg_len = 1;
 476         }
 477         aic->msg_outq |= AIC_MSG_MSGBUF;
 478         aic_outb(aic, SCSISIGO, aic_inb(aic, SCSISIGI) | ATNO);
 479 }
 480
 481 /*
 482  * Wait for SPIORDY (SCSI PIO ready) flag, or a phase change.
 483  */
 484 static __inline int
 485 aic_spiordy(struct aic_softc *aic)
 486 {
 487         while (!(aic_inb(aic, DMASTAT) & INTSTAT) &&
 488             !(aic_inb(aic, SSTAT0) & SPIORDY))
 489                 ;
 490         return !(aic_inb(aic, DMASTAT) & INTSTAT);
 491 }
 492
 493 /*
 494  * Reestablish a disconnected nexus.
 495  */
 496 static void
 497 aic_reconnect(struct aic_softc *aic, int tag)
 498 {
 499         struct aic_scb *scb;
 500         struct ccb_hdr *ccb_h;
 501
 502         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_reconnect\n"));
 503
 504         /* Find the nexus */
 505         scb = NULL;
 506         TAILQ_FOREACH(ccb_h, &aic->nexus_ccbs, sim_links.tqe) {
 507                 scb = (struct aic_scb *)ccb_h->ccb_scb_ptr;
 508                 if (scb->target == aic->target && scb->lun == aic->lun &&
 509                     (tag == -1 || scb->tag == tag))
 510                         break;
 511         }
 512
 513         /* ABORT if nothing is found */
 514         if (!ccb_h) {
 515                 if (tag == -1)
 516                         aic_sched_msgout(aic, MSG_ABORT);
 517                 else
 518                         aic_sched_msgout(aic, MSG_ABORT_TAG);
 519                 xpt_async(AC_UNSOL_RESEL, aic->path, NULL);
 520                 return;
 521         }
 522
 523         /* Reestablish the nexus */
 524         TAILQ_REMOVE(&aic->nexus_ccbs, ccb_h, sim_links.tqe);
 525         aic->nexus = scb;
 526         scb->flags &= ~SCB_DISCONNECTED;
 527         aic->state = AIC_HASNEXUS;
 528 }
 529
 530 /*
 531  * Read messages.
 532  */
 533 static void
 534 aic_msgin(struct aic_softc *aic)
 535 {
 536         int msglen;
 537
 538         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_msgin\n"));
 539
 540         aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
 541         aic_outb(aic, SXFRCTL0, CHEN|SPIOEN);
 542
 543         aic->flags &= ~AIC_DROP_MSGIN;
 544         aic->msg_len = 0;
 545         do {
 546                 /*
 547                  * If a parity error is detected, drop the remaining
 548                  * bytes and inform the target so it could resend
 549                  * the messages.
 550                  */
 551                 if (aic_inb(aic, SSTAT1) & SCSIPERR) {
 552                         aic_outb(aic, CLRSINT1, CLRSCSIPERR);
 553                         aic->flags |= AIC_DROP_MSGIN;
 554                         aic_sched_msgout(aic, MSG_PARITY_ERROR);
 555                 }
 556                 if ((aic->flags & AIC_DROP_MSGIN)) {
 557                         aic_inb(aic, SCSIDAT);
 558                         continue;
 559                 }
 560                 /* read the message byte without ACKing on it */
 561                 aic->msg_buf[aic->msg_len++] = aic_inb(aic, SCSIBUS);
 562                 if (aic->msg_buf[0] == MSG_EXTENDED) {
 563                         if (aic->msg_len < 2) {
 564                                 (void) aic_inb(aic, SCSIDAT);
 565                                 continue;
 566                         }
 567                         switch (aic->msg_buf[2]) {
 568                         case MSG_EXT_SDTR:
 569                                 msglen = MSG_EXT_SDTR_LEN;
 570                                 break;
 571                         case MSG_EXT_WDTR:
 572                                 msglen = MSG_EXT_WDTR_LEN;
 573                                 break;
 574                         default:
 575                                 msglen = 0;
 576                                 break;
 577                         }
 578                         if (aic->msg_buf[1] != msglen) {
 579                                 aic->flags |= AIC_DROP_MSGIN;
 580                                 aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
 581                         }
 582                         msglen += 2;
 583                 } else if (aic->msg_buf[0] >= 0x20 && aic->msg_buf[0] <= 0x2f)
 584                         msglen = 2;
 585                 else
 586                         msglen = 1;
 587                 /*
 588                  * If we have a complete message, handle it before the final
 589                  * ACK (in case we decide to reject the message).
 590                  */
 591                 if (aic->msg_len == msglen) {
 592                         aic_handle_msgin(aic);
 593                         aic->msg_len = 0;
 594                 }
 595                 /* ACK on the message byte */
 596                 (void) aic_inb(aic, SCSIDAT);
 597         } while (aic_spiordy(aic));
 598
 599         aic_outb(aic, SXFRCTL0, CHEN);
 600         aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
 601 }
 602
 603 /*
 604  * Handle a message.
 605  */
 606 static void
 607 aic_handle_msgin(struct aic_softc *aic)
 608 {
 609         struct aic_scb *scb;
 610         struct ccb_hdr *ccb_h;
 611         struct aic_tinfo *ti;
 612         struct ccb_trans_settings neg;
 613         struct ccb_trans_settings_spi *spi = &neg.xport_specific.spi;
 614
 615         if (aic->state == AIC_RESELECTED) {
 616                 if (!MSG_ISIDENTIFY(aic->msg_buf[0])) {
 617                         aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
 618                         return;
 619                 }
 620                 aic->lun = aic->msg_buf[0] & MSG_IDENTIFY_LUNMASK;
 621                 if (aic->tinfo[aic->target].lubusy & (1 << aic->lun))
 622                         aic_reconnect(aic, -1);
 623                 else
 624                         aic->state = AIC_RECONNECTING;
 625                 return;
 626         }
 627
 628         if (aic->state == AIC_RECONNECTING) {
 629                 if (aic->msg_buf[0] != MSG_SIMPLE_Q_TAG) {
 630                         aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
 631                         return;
 632                 }
 633                 aic_reconnect(aic, aic->msg_buf[1]);
 634                 return;
 635         }
 636
 637         switch (aic->msg_buf[0]) {
 638         case MSG_CMDCOMPLETE: {
 639                 struct ccb_scsiio *csio;
 640                 scb = aic->nexus;
 641                 ccb_h = &scb->ccb->ccb_h;
 642                 csio = &scb->ccb->csio;
 643                 if ((scb->flags & SCB_SENSE) != 0) {
 644                         /* auto REQUEST SENSE command */
 645                         scb->flags &= ~SCB_SENSE;
 646                         csio->sense_resid = scb->data_len;
 647                         if (scb->status == SCSI_STATUS_OK) {
 648                                 ccb_h->status |=
 649                                     CAM_SCSI_STATUS_ERROR|CAM_AUTOSNS_VALID;
 650                                 /*scsi_sense_print(csio);*/
 651                         } else {
 652                                 ccb_h->status |= CAM_AUTOSENSE_FAIL;
 653                                 kprintf("ccb %p sense failed %x\n",
 654                                     ccb_h, scb->status);
 655                         }
 656                 } else {
 657                         csio->scsi_status = scb->status;
 658                         csio->resid = scb->data_len;
 659                         if (scb->status == SCSI_STATUS_OK) {
 660                                 /* everything goes well */
 661                                 ccb_h->status |= CAM_REQ_CMP;
 662                         } else if ((ccb_h->flags & CAM_DIS_AUTOSENSE) == 0 &&
 663                             (csio->scsi_status == SCSI_STATUS_CHECK_COND ||
 664                              csio->scsi_status == SCSI_STATUS_CMD_TERMINATED)) {
 665                                 /* try to retrieve sense information */
 666                                 scb->flags |= SCB_SENSE;
 667                                 aic->flags |= AIC_BUSFREE_OK;
 668                                 return;
 669                         } else
 670                                 ccb_h->status |= CAM_SCSI_STATUS_ERROR;
 671                 }
 672                 aic_done(aic, scb);
 673                 aic->flags |= AIC_BUSFREE_OK;
 674                 break;
 675         }
 676         case MSG_EXTENDED:
 677                 switch (aic->msg_buf[2]) {
 678                 case MSG_EXT_SDTR:
 679                         scb = aic->nexus;
 680                         ti = &aic->tinfo[scb->target];
 681                         if (ti->flags & TINFO_SDTR_SENT) {
 682                                 ti->current.period = aic->msg_buf[3];
 683                                 ti->current.offset = aic->msg_buf[4];
 684                         } else {
 685                                 ti->current.period = aic->msg_buf[3] =
 686                                         max(ti->goal.period, aic->msg_buf[3]);
 687                                 ti->current.offset = aic->msg_buf[4] =
 688                                         min(ti->goal.offset, aic->msg_buf[4]);
 689                                 /*
 690                                  * The target initiated the negotiation,
 691                                  * send back a response.
 692                                  */
 693                                 aic_sched_msgout(aic, 0);
 694                         }
 695                         ti->flags &= ~(TINFO_SDTR_SENT|TINFO_SDTR_NEGO);
 696                         ti->scsirate = ti->current.offset ? ti->current.offset |
 697                             ((ti->current.period * 4 + 49) / 50 - 2) << 4 : 0;
 698                         aic_outb(aic, SCSIRATE, ti->scsirate);
 699                         memset(&neg, 0, sizeof (neg));
 700                         neg.protocol = PROTO_SCSI;
 701                         neg.protocol_version = SCSI_REV_2;
 702                         neg.transport = XPORT_SPI;
 703                         neg.transport_version = 2;
 704                         spi->sync_period = ti->goal.period = ti->current.period;
 705                         spi->sync_offset = ti->goal.offset = ti->current.offset;
 706                         spi->valid = CTS_SPI_VALID_SYNC_RATE
 707                                   | CTS_SPI_VALID_SYNC_OFFSET;
 708                         ccb_h = &scb->ccb->ccb_h;
 709                         xpt_setup_ccb(&neg.ccb_h, ccb_h->path, 1);
 710                         xpt_async(AC_TRANSFER_NEG, ccb_h->path, &neg);
 711                         break;
 712                 case MSG_EXT_WDTR:
 713                 default:
 714                         aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
 715                         break;
 716                 }
 717                 break;
 718         case MSG_DISCONNECT:
 719                 scb = aic->nexus;
 720                 ccb_h = &scb->ccb->ccb_h;
 721                 TAILQ_INSERT_TAIL(&aic->nexus_ccbs, ccb_h, sim_links.tqe);
 722                 scb->flags |= SCB_DISCONNECTED;
 723                 aic->flags |= AIC_BUSFREE_OK;
 724                 aic->nexus = NULL;
 725                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, ("disconnected\n"));
 726                 break;
 727         case MSG_MESSAGE_REJECT:
 728                 switch (aic->msg_outq & -aic->msg_outq) {
 729                 case AIC_MSG_TAG_Q:
 730                         scb = aic->nexus;
 731                         ti = &aic->tinfo[scb->target];
 732                         ti->flags &= ~TINFO_TAG_ENB;
 733                         ti->lubusy |= 1 << scb->lun;
 734                         break;
 735                 case AIC_MSG_SDTR:
 736                         scb = aic->nexus;
 737                         ti = &aic->tinfo[scb->target];
 738                         ti->current.period = ti->goal.period = 0;
 739                         ti->current.offset = ti->goal.offset = 0;
 740                         ti->flags &= ~(TINFO_SDTR_SENT|TINFO_SDTR_NEGO);
 741                         ti->scsirate = 0;
 742                         aic_outb(aic, SCSIRATE, ti->scsirate);
 743                         memset(&neg, 0, sizeof (neg));
 744                         neg.protocol = PROTO_SCSI;
 745                         neg.protocol_version = SCSI_REV_2;
 746                         neg.transport = XPORT_SPI;
 747                         neg.transport_version = 2;
 748                         spi->sync_period = ti->current.period;
 749                         spi->sync_offset = ti->current.offset;
 750                         spi->valid = CTS_SPI_VALID_SYNC_RATE
 751                                   | CTS_SPI_VALID_SYNC_OFFSET;
 752                         ccb_h = &scb->ccb->ccb_h;
 753                         xpt_setup_ccb(&neg.ccb_h, ccb_h->path, 1);
 754                         xpt_async(AC_TRANSFER_NEG, ccb_h->path, &neg);
 755                         break;
 756                 default:
 757                         break;
 758                 }
 759                 break;
 760         case MSG_SAVEDATAPOINTER:
 761                 break;
 762         case MSG_RESTOREPOINTERS:
 763                 break;
 764         case MSG_NOOP:
 765                 break;
 766         default:
 767                 aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
 768                 break;
 769         }
 770 }
 771
 772 /*
 773  * Send messages.
 774  */
 775 static void
 776 aic_msgout(struct aic_softc *aic)
 777 {
 778         struct aic_scb *scb;
 779         union ccb *ccb;
 780         struct aic_tinfo *ti;
 781         int msgidx = 0;
 782
 783         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_msgout\n"));
 784
 785         aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
 786         aic_outb(aic, SXFRCTL0, CHEN|SPIOEN);
 787
 788         /*
 789          * If the previous phase is also the message out phase,
 790          * we need to retransmit all the messages, probably
 791          * because the target has detected a parity error during
 792          * the past transmission.
 793          */
 794         if (aic->prev_phase == PH_MSGOUT)
 795                 aic->msg_outq = aic->msg_sent;
 796
 797         do {
 798                 int q = aic->msg_outq;
 799                 if (msgidx > 0 && msgidx == aic->msg_len) {
 800                         /* complete message sent, start the next one */
 801                         q &= -q;
 802                         aic->msg_sent |= q;
 803                         aic->msg_outq ^= q;
 804                         q = aic->msg_outq;
 805                         msgidx = 0;
 806                 }
 807                 if (msgidx == 0) {
 808                         /* setup the message */
 809                         switch (q & -q) {
 810                         case AIC_MSG_IDENTIFY:
 811                                 scb = aic->nexus;
 812                                 ccb = scb->ccb;
 813                                 ti = &aic->tinfo[scb->target];
 814                                 aic->msg_buf[0] = MSG_IDENTIFY(scb->lun,
 815                                     (ti->flags & TINFO_DISC_ENB) &&
 816                                     !(ccb->ccb_h.flags & CAM_DIS_DISCONNECT));
 817                                 aic->msg_len = 1;
 818                                 break;
 819                         case AIC_MSG_TAG_Q:
 820                                 scb = aic->nexus;
 821                                 ccb = scb->ccb;
 822                                 aic->msg_buf[0] = ccb->csio.tag_action;
 823                                 aic->msg_buf[1] = scb->tag;
 824                                 aic->msg_len = 2;
 825                                 break;
 826                         case AIC_MSG_SDTR:
 827                                 scb = aic->nexus;
 828                                 ti = &aic->tinfo[scb->target];
 829                                 aic->msg_buf[0] = MSG_EXTENDED;
 830                                 aic->msg_buf[1] = MSG_EXT_SDTR_LEN;
 831                                 aic->msg_buf[2] = MSG_EXT_SDTR;
 832                                 aic->msg_buf[3] = ti->goal.period;
 833                                 aic->msg_buf[4] = ti->goal.offset;
 834                                 aic->msg_len = MSG_EXT_SDTR_LEN + 2;
 835                                 ti->flags |= TINFO_SDTR_SENT;
 836                                 break;
 837                         case AIC_MSG_MSGBUF:
 838                                 /* a single message already in the buffer */
 839                                 if (aic->msg_buf[0] == MSG_BUS_DEV_RESET ||
 840                                     aic->msg_buf[0] == MSG_ABORT ||
 841                                     aic->msg_buf[0] == MSG_ABORT_TAG)
 842                                         aic->flags |= AIC_BUSFREE_OK;
 843                                 break;
 844                         }
 845                 }
 846                 /*
 847                  * If this is the last message byte of all messages,
 848                  * clear ATNO to signal transmission complete.
 849                  */
 850                 if ((q & (q - 1)) == 0 && msgidx == aic->msg_len - 1)
 851                         aic_outb(aic, CLRSINT1, CLRATNO);
 852                 /* transmit the message byte */
 853                 aic_outb(aic, SCSIDAT, aic->msg_buf[msgidx++]);
 854         } while (aic_spiordy(aic));
 855
 856         aic_outb(aic, SXFRCTL0, CHEN);
 857         aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
 858 }
 859
 860 /*
 861  * Read data bytes.
 862  */
 863 static void
 864 aic_datain(struct aic_softc *aic)
 865 {
 866         struct aic_scb *scb = aic->nexus;
 867         u_int8_t dmastat, dmacntrl0;
 868         int n;
 869
 870         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_datain\n"));
 871
 872         aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
 873         aic_outb(aic, SXFRCTL0, SCSIEN|DMAEN|CHEN);
 874
 875         dmacntrl0 = ENDMA;
 876         if (aic->flags & AIC_DWIO_ENABLE)
 877                 dmacntrl0 |= DWORDPIO;
 878         aic_outb(aic, DMACNTRL0, dmacntrl0);
 879
 880         while (scb->data_len > 0) {
 881                 for (;;) {
 882                         /* wait for the fifo to fill up or a phase change */
 883                         dmastat = aic_inb(aic, DMASTAT);
 884                         if (dmastat & (INTSTAT|DFIFOFULL))
 885                                 break;
 886                 }
 887                 if (dmastat & DFIFOFULL) {
 888                         n = FIFOSIZE;
 889                 } else {
 890                         /*
 891                          * No more data, wait for the remaining bytes in
 892                          * the scsi fifo to be transfer to the host fifo.
 893                          */
 894                         while (!(aic_inb(aic, SSTAT2) & SEMPTY))
 895                                 ;
 896                         n = aic_inb(aic, FIFOSTAT);
 897                 }
 898                 n = imin(scb->data_len, n);
 899                 if (aic->flags & AIC_DWIO_ENABLE) {
 900                         if (n >= 12) {
 901                                 aic_insl(aic, DMADATALONG, scb->data_ptr, n>>2);
 902                                 scb->data_ptr += n & ~3;
 903                                 scb->data_len -= n & ~3;
 904                                 n &= 3;
 905                         }
 906                 } else {
 907                         if (n >= 8) {
 908                                 aic_insw(aic, DMADATA, scb->data_ptr, n >> 1);
 909                                 scb->data_ptr += n & ~1;
 910                                 scb->data_len -= n & ~1;
 911                                 n &= 1;
 912                         }
 913                 }
 914                 if (n) {
 915                         aic_outb(aic, DMACNTRL0, ENDMA|B8MODE);
 916                         aic_insb(aic, DMADATA, scb->data_ptr, n);
 917                         scb->data_ptr += n;
 918                         scb->data_len -= n;
 919                         aic_outb(aic, DMACNTRL0, dmacntrl0);
 920                 }
 921
 922                 if (dmastat & INTSTAT)
 923                         break;
 924         }
 925
 926         aic_outb(aic, SXFRCTL0, CHEN);
 927         aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
 928 }
 929
 930 /*
 931  * Send data bytes.
 932  */
 933 static void
 934 aic_dataout(struct aic_softc *aic)
 935 {
 936         struct aic_scb *scb = aic->nexus;
 937         u_int8_t dmastat, dmacntrl0, sstat2;
 938         int n;
 939
 940         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_dataout\n"));
 941
 942         aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
 943         aic_outb(aic, SXFRCTL0, SCSIEN|DMAEN|CHEN);
 944
 945         dmacntrl0 = ENDMA|WRITE;
 946         if (aic->flags & AIC_DWIO_ENABLE)
 947                 dmacntrl0 |= DWORDPIO;
 948         aic_outb(aic, DMACNTRL0, dmacntrl0);
 949
 950         while (scb->data_len > 0) {
 951                 for (;;) {
 952                         /* wait for the fifo to clear up or a phase change */
 953                         dmastat = aic_inb(aic, DMASTAT);
 954                         if (dmastat & (INTSTAT|DFIFOEMP))
 955                                 break;
 956                 }
 957                 if (dmastat & INTSTAT)
 958                         break;
 959                 n = imin(scb->data_len, FIFOSIZE);
 960                 if (aic->flags & AIC_DWIO_ENABLE) {
 961                         if (n >= 12) {
 962                                 aic_outsl(aic, DMADATALONG, scb->data_ptr,n>>2);
 963                                 scb->data_ptr += n & ~3;
 964                                 scb->data_len -= n & ~3;
 965                                 n &= 3;
 966                         }
 967                 } else {
 968                         if (n >= 8) {
 969                                 aic_outsw(aic, DMADATA, scb->data_ptr, n >> 1);
 970                                 scb->data_ptr += n & ~1;
 971                                 scb->data_len -= n & ~1;
 972                                 n &= 1;
 973                         }
 974                 }
 975                 if (n) {
 976                         aic_outb(aic, DMACNTRL0, ENDMA|WRITE|B8MODE);
 977                         aic_outsb(aic, DMADATA, scb->data_ptr, n);
 978                         scb->data_ptr += n;
 979                         scb->data_len -= n;
 980                         aic_outb(aic, DMACNTRL0, dmacntrl0);
 981                 }
 982         }
 983
 984         for (;;) {
 985                 /* wait until all bytes in the fifos are transmitted */
 986                 dmastat = aic_inb(aic, DMASTAT);
 987                 sstat2 = aic_inb(aic, SSTAT2);
 988                 if ((dmastat & DFIFOEMP) && (sstat2 & SEMPTY))
 989                         break;
 990                 if (dmastat & INTSTAT) {
 991                         /* adjust for untransmitted bytes */
 992                         n = aic_inb(aic, FIFOSTAT) + (sstat2 & 0xf);
 993                         scb->data_ptr -= n;
 994                         scb->data_len += n;
 995                         /* clear the fifo */
 996                         aic_outb(aic, SXFRCTL0, CHEN|CLRCH);
 997                         aic_outb(aic, DMACNTRL0, RSTFIFO);
 998                         break;
 999                 }
1000         }
1001
1002         aic_outb(aic, SXFRCTL0, CHEN);
1003         aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
1004 }
1005
1006 /*
1007  * Send the scsi command.
1008  */
1009 static void
1010 aic_cmd(struct aic_softc *aic)
1011 {
1012         struct aic_scb *scb = aic->nexus;
1013         struct scsi_request_sense sense_cmd;
1014
1015         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_cmd\n"));
1016
1017         if (scb->flags & SCB_SENSE) {
1018                 /* autosense request */
1019                 sense_cmd.opcode = REQUEST_SENSE;
1020                 sense_cmd.byte2 = scb->lun << 5;
1021                 sense_cmd.length = scb->ccb->csio.sense_len;
1022                 sense_cmd.control = 0;
1023                 sense_cmd.unused[0] = 0;
1024                 sense_cmd.unused[1] = 0;
1025                 scb->cmd_ptr = (u_int8_t *)&sense_cmd;
1026                 scb->cmd_len = sizeof(sense_cmd);
1027                 scb->data_ptr = (u_int8_t *)&scb->ccb->csio.sense_data;
1028                 scb->data_len = scb->ccb->csio.sense_len;
1029         }
1030
1031         aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
1032         aic_outb(aic, DMACNTRL0, ENDMA|WRITE);
1033         aic_outb(aic, SXFRCTL0, SCSIEN|DMAEN|CHEN);
1034         aic_outsw(aic, DMADATA, (u_int16_t *)scb->cmd_ptr, scb->cmd_len >> 1);
1035         while ((aic_inb(aic, SSTAT2) & SEMPTY) == 0 &&
1036             (aic_inb(aic, DMASTAT) & INTSTAT) == 0)
1037                 ;
1038         aic_outb(aic, SXFRCTL0, CHEN);
1039         aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
1040 }
1041
1042 /*
1043  * Finish off a command. The caller is responsible to remove the ccb
1044  * from any queue.
1045  */
1046 static void
1047 aic_done(struct aic_softc *aic, struct aic_scb *scb)
1048 {
1049         union ccb *ccb = scb->ccb;
1050
1051         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
1052                   ("aic_done - ccb %p status %x resid %d\n",
1053                    ccb, ccb->ccb_h.status, ccb->csio.resid));
1054
1055         callout_stop(&ccb->ccb_h.timeout_ch);
1056
1057         if ((scb->flags & SCB_DEVICE_RESET) != 0 &&
1058             ccb->ccb_h.func_code != XPT_RESET_DEV) {
1059                 struct cam_path *path;
1060                 struct ccb_hdr *ccb_h;
1061                 cam_status error;
1062
1063                 error = xpt_create_path(&path, /*periph*/NULL,
1064                                         cam_sim_path(aic->sim),
1065                                         scb->target,
1066                                         CAM_LUN_WILDCARD);
1067
1068                 if (error == CAM_REQ_CMP) {
1069                         xpt_async(AC_SENT_BDR, path, NULL);
1070                         xpt_free_path(path);
1071                 }
1072
1073                 ccb_h = TAILQ_FIRST(&aic->pending_ccbs);
1074                 while (ccb_h != NULL) {
1075                         struct aic_scb *pending_scb;
1076
1077                         pending_scb = (struct aic_scb *)ccb_h->ccb_scb_ptr;
1078                         if (ccb_h->target_id == scb->target) {
1079                                 ccb_h->status |= CAM_BDR_SENT;
1080                                 ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
1081                                 TAILQ_REMOVE(&aic->pending_ccbs,
1082                                     &pending_scb->ccb->ccb_h, sim_links.tqe);
1083                                 aic_done(aic, pending_scb);
1084                         } else {
1085                                 callout_reset(&ccb_h->timeout_ch,
1086                                     (ccb_h->timeout * hz) / 1000,
1087                                     aic_timeout, pending_scb);
1088                                 ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
1089                         }
1090                 }
1091
1092                 ccb_h = TAILQ_FIRST(&aic->nexus_ccbs);
1093                 while (ccb_h != NULL) {
1094                         struct aic_scb *nexus_scb;
1095
1096                         nexus_scb = (struct aic_scb *)ccb_h->ccb_scb_ptr;
1097                         if (ccb_h->target_id == scb->target) {
1098                                 ccb_h->status |= CAM_BDR_SENT;
1099                                 ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
1100                                 TAILQ_REMOVE(&aic->nexus_ccbs,
1101                                     &nexus_scb->ccb->ccb_h, sim_links.tqe);
1102                                 aic_done(aic, nexus_scb);
1103                         } else {
1104                                 callout_reset(&ccb_h->timeout_ch,
1105                                     (ccb_h->timeout * hz) / 1000,
1106                                     aic_timeout, nexus_scb);
1107                                 ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
1108                         }
1109                 }
1110         }
1111
1112         if (aic->nexus == scb || scb->flags & SCB_DISCONNECTED)
1113                 aic->tinfo[scb->target].lubusy &= ~(1 << scb->lun);
1114
1115         if (aic->nexus == scb) {
1116                 aic->nexus = NULL;
1117         }
1118         aic_free_scb(aic, scb);
1119         xpt_done(ccb);
1120 }
1121
1122 static void
1123 aic_poll(struct cam_sim *sim)
1124 {
1125         aic_intr(cam_sim_softc(sim));
1126 }
1127
1128 static void
1129 aic_timeout(void *arg)
1130 {
1131         struct aic_scb *scb = (struct aic_scb *)arg;
1132         union ccb *ccb = scb->ccb;
1133         struct aic_softc *aic = (struct aic_softc *)ccb->ccb_h.ccb_aic_ptr;
1134
1135         xpt_print_path(ccb->ccb_h.path);
1136         kprintf("ccb %p - timed out", ccb);
1137         if (aic->nexus && aic->nexus != scb)
1138                 kprintf(", nexus %p", aic->nexus->ccb);
1139         kprintf(", phase 0x%x, state %d\n", aic_inb(aic, SCSISIGI), aic->state);
1140
1141         crit_enter();
1142
1143         if ((scb->flags & SCB_ACTIVE) == 0) {
1144                 crit_exit();
1145                 xpt_print_path(ccb->ccb_h.path);
1146                 kprintf("ccb %p - timed out already completed\n", ccb);
1147                 return;
1148         }
1149
1150         if ((scb->flags & SCB_DEVICE_RESET) == 0 && aic->nexus == scb) {
1151                 struct ccb_hdr *ccb_h = &scb->ccb->ccb_h;
1152
1153                 if ((ccb_h->status & CAM_RELEASE_SIMQ) == 0) {
1154                         xpt_freeze_simq(aic->sim, /*count*/1);
1155                         ccb_h->status |= CAM_RELEASE_SIMQ;
1156                 }
1157
1158                 TAILQ_FOREACH(ccb_h, &aic->pending_ccbs, sim_links.tqe)
1159                         callout_stop(&ccb_h->timeout_ch);
1160
1161                 TAILQ_FOREACH(ccb_h, &aic->nexus_ccbs, sim_links.tqe)
1162                         callout_stop(&ccb_h->timeout_ch);
1163
1164                 scb->flags |= SCB_DEVICE_RESET;
1165                 callout_reset(&ccb->ccb_h.timeout_ch, 5 * hz, aic_timeout, scb);
1166                 aic_sched_msgout(aic, MSG_BUS_DEV_RESET);
1167         } else {
1168                 if (aic->nexus == scb) {
1169                         ccb->ccb_h.status |= CAM_CMD_TIMEOUT;
1170                         aic_done(aic, scb);
1171                 }
1172                 aic_reset(aic, /*initiate_reset*/TRUE);
1173         }
1174
1175         crit_exit();
1176 }
1177
1178 void
1179 aic_intr(void *arg)
1180 {
1181         struct aic_softc *aic = (struct aic_softc *)arg;
1182         u_int8_t sstat0, sstat1;
1183         union ccb *ccb;
1184         struct aic_scb *scb;
1185
1186         if (!(aic_inb(aic, DMASTAT) & INTSTAT))
1187                 return;
1188
1189         aic_outb(aic, DMACNTRL0, 0);
1190
1191         sstat0 = aic_inb(aic, SSTAT0);
1192         sstat1 = aic_inb(aic, SSTAT1);
1193
1194         if ((sstat1 & SCSIRSTI) != 0) {
1195                 /* a device-initiated bus reset */
1196                 aic_outb(aic, CLRSINT1, CLRSCSIRSTI);
1197                 aic_reset(aic, /*initiate_reset*/FALSE);
1198                 return;
1199         }
1200
1201         if ((sstat1 & SCSIPERR) != 0) {
1202                 aic_outb(aic, CLRSINT1, CLRSCSIPERR);
1203                 aic_sched_msgout(aic, MSG_PARITY_ERROR);
1204                 aic_outb(aic, DMACNTRL0, INTEN);
1205                 return;
1206         }
1207
1208         if (aic_inb(aic, SSTAT4)) {
1209                 aic_outb(aic, CLRSERR, CLRSYNCERR|CLRFWERR|CLRFRERR);
1210                 aic_reset(aic, /*initiate_reset*/TRUE);
1211                 return;
1212         }
1213
1214         if (aic->state <= AIC_SELECTING) {
1215                 if ((sstat0 & SELDI) != 0) {
1216                         aic_reselected(aic);
1217                         aic_outb(aic, DMACNTRL0, INTEN);
1218                         return;
1219                 }
1220
1221                 if ((sstat0 & SELDO) != 0) {
1222                         aic_selected(aic);
1223                         aic_outb(aic, DMACNTRL0, INTEN);
1224                         return;
1225                 }
1226
1227                 if ((sstat1 & SELTO) != 0) {
1228                         scb = aic->nexus;
1229                         ccb = scb->ccb;
1230                         ccb->ccb_h.status = CAM_SEL_TIMEOUT;
1231                         aic_done(aic, scb);
1232                         while ((sstat1 & BUSFREE) == 0)
1233                                 sstat1 = aic_inb(aic, SSTAT1);
1234                         aic->flags |= AIC_BUSFREE_OK;
1235                 }
1236         }
1237
1238         if ((sstat1 & BUSFREE) != 0) {
1239                 aic_outb(aic, SCSISEQ, 0);
1240                 aic_outb(aic, CLRSINT0, sstat0);
1241                 aic_outb(aic, CLRSINT1, sstat1);
1242                 if ((scb = aic->nexus)) {
1243                         if ((aic->flags & AIC_BUSFREE_OK) == 0) {
1244                                 ccb = scb->ccb;
1245                                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
1246                                 aic_done(aic, scb);
1247                         } else if (scb->flags & SCB_DEVICE_RESET) {
1248                                 ccb = scb->ccb;
1249                                 if (ccb->ccb_h.func_code == XPT_RESET_DEV) {
1250                                         xpt_async(AC_SENT_BDR,
1251                                             ccb->ccb_h.path, NULL);
1252                                         ccb->ccb_h.status |= CAM_REQ_CMP;
1253                                 } else
1254                                         ccb->ccb_h.status |= CAM_CMD_TIMEOUT;
1255                                 aic_done(aic, scb);
1256                         } else if (scb->flags & SCB_SENSE) {
1257                                 /* autosense request */
1258                                 aic->flags &= ~AIC_BUSFREE_OK;
1259                                 aic->tinfo[scb->target].lubusy &=
1260                                     ~(1 << scb->lun);
1261                                 aic_select(aic);
1262                                 aic_outb(aic, DMACNTRL0, INTEN);
1263                                 return;
1264                         }
1265                 }
1266                 aic->flags &= ~AIC_BUSFREE_OK;
1267                 aic->state = AIC_IDLE;
1268                 aic_start(aic);
1269                 aic_outb(aic, DMACNTRL0, INTEN);
1270                 return;
1271         }
1272
1273         if ((sstat1 & REQINIT) != 0) {
1274                 u_int8_t phase = aic_inb(aic, SCSISIGI) & PH_MASK;
1275                 aic_outb(aic, SCSISIGO, phase);
1276                 aic_outb(aic, CLRSINT1, CLRPHASECHG);
1277
1278                 switch (phase) {
1279                 case PH_MSGOUT:
1280                         aic_msgout(aic);
1281                         break;
1282                 case PH_MSGIN:
1283                         aic_msgin(aic);
1284                         break;
1285                 case PH_STAT:
1286                         scb = aic->nexus;
1287                         ccb = scb->ccb;
1288                         aic_outb(aic, DMACNTRL0, 0);
1289                         aic_outb(aic, SXFRCTL0, CHEN|SPIOEN);
1290                         scb->status = aic_inb(aic, SCSIDAT);
1291                         aic_outb(aic, SXFRCTL0, CHEN);
1292                         break;
1293                 case PH_CMD:
1294                         aic_cmd(aic);
1295                         break;
1296                 case PH_DATAIN:
1297                         aic_datain(aic);
1298                         break;
1299                 case PH_DATAOUT:
1300                         aic_dataout(aic);
1301                         break;
1302                 }
1303                 aic->prev_phase = phase;
1304                 aic_outb(aic, DMACNTRL0, INTEN);
1305                 return;
1306         }
1307
1308         kprintf("aic_intr: unexpected intr sstat0 %x sstat1 %x\n",
1309                 sstat0, sstat1);
1310         aic_outb(aic, DMACNTRL0, INTEN);
1311 }
1312
1313 /*
1314  * Reset ourselves.
1315  */
1316 static void
1317 aic_chip_reset(struct aic_softc *aic)
1318 {
1319         /*
1320          * Doc. recommends to clear these two registers before
1321          * operations commence
1322          */
1323         aic_outb(aic, SCSITEST, 0);
1324         aic_outb(aic, TEST, 0);
1325
1326         /* Reset SCSI-FIFO and abort any transfers */
1327         aic_outb(aic, SXFRCTL0, CHEN|CLRCH|CLRSTCNT);
1328
1329         /* Reset HOST-FIFO */
1330         aic_outb(aic, DMACNTRL0, RSTFIFO);
1331         aic_outb(aic, DMACNTRL1, 0);
1332
1333         /* Disable all selection features */
1334         aic_outb(aic, SCSISEQ, 0);
1335         aic_outb(aic, SXFRCTL1, 0);
1336
1337         /* Disable interrupts */
1338         aic_outb(aic, SIMODE0, 0);
1339         aic_outb(aic, SIMODE1, 0);
1340
1341         /* Clear interrupts */
1342         aic_outb(aic, CLRSINT0, 0x7f);
1343         aic_outb(aic, CLRSINT1, 0xef);
1344
1345         /* Disable synchronous transfers */
1346         aic_outb(aic, SCSIRATE, 0);
1347
1348         /* Haven't seen ant errors (yet) */
1349         aic_outb(aic, CLRSERR, 0x07);
1350
1351         /* Set our SCSI-ID */
1352         aic_outb(aic, SCSIID, aic->initiator << OID_S);
1353         aic_outb(aic, BRSTCNTRL, EISA_BRST_TIM);
1354 }
1355
1356 /*
1357  * Reset the SCSI bus
1358  */
1359 static void
1360 aic_scsi_reset(struct aic_softc *aic)
1361 {
1362         aic_outb(aic, SCSISEQ, SCSIRSTO);
1363         DELAY(500);
1364         aic_outb(aic, SCSISEQ, 0);
1365         DELAY(50);
1366 }
1367
1368 /*
1369  * Reset. Abort all pending commands.
1370  */
1371 static void
1372 aic_reset(struct aic_softc *aic, int initiate_reset)
1373 {
1374         struct ccb_hdr *ccb_h;
1375
1376         CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_reset\n"));
1377
1378         if (initiate_reset)
1379                 aic_scsi_reset(aic);
1380         aic_chip_reset(aic);
1381
1382         xpt_async(AC_BUS_RESET, aic->path, NULL);
1383
1384         while ((ccb_h = TAILQ_FIRST(&aic->pending_ccbs)) != NULL) {
1385                 TAILQ_REMOVE(&aic->pending_ccbs, ccb_h, sim_links.tqe);
1386                 ccb_h->status |= CAM_SCSI_BUS_RESET;
1387                 aic_done(aic, (struct aic_scb *)ccb_h->ccb_scb_ptr);
1388         }
1389
1390         while ((ccb_h = TAILQ_FIRST(&aic->nexus_ccbs)) != NULL) {
1391                 TAILQ_REMOVE(&aic->nexus_ccbs, ccb_h, sim_links.tqe);
1392                 ccb_h->status |= CAM_SCSI_BUS_RESET;
1393                 aic_done(aic, (struct aic_scb *)ccb_h->ccb_scb_ptr);
1394         }
1395
1396         if (aic->nexus) {
1397                 ccb_h = &aic->nexus->ccb->ccb_h;
1398                 ccb_h->status |= CAM_SCSI_BUS_RESET;
1399                 aic_done(aic, aic->nexus);
1400         }
1401
1402         aic->state = AIC_IDLE;
1403         aic_outb(aic, DMACNTRL0, INTEN);
1404 }
1405
1406 static char *aic_chip_names[] = {
1407         "AIC6260", "AIC6360", "AIC6370", "GM82C700",
1408 };
1409
1410 static struct {
1411         int type;
1412         char *idstring;
1413 } aic_chip_ids[] = {
1414         { AIC6360, IDSTRING_AIC6360 },
1415         { AIC6370, IDSTRING_AIC6370 },
1416         { GM82C700, IDSTRING_GM82C700 },
1417 };
1418
1419 static void
1420 aic_init(struct aic_softc *aic)
1421 {
1422         struct aic_scb *scb;
1423         struct aic_tinfo *ti;
1424         u_int8_t porta, portb;
1425         char chip_id[33];
1426         int i;
1427
1428         TAILQ_INIT(&aic->pending_ccbs);
1429         TAILQ_INIT(&aic->nexus_ccbs);
1430         aic->nexus = NULL;
1431         aic->state = AIC_IDLE;
1432         aic->prev_phase = -1;
1433         aic->flags = 0;
1434
1435         aic_chip_reset(aic);
1436         aic_scsi_reset(aic);
1437
1438         /* determine the chip type from its ID string */
1439         aic->chip_type = AIC6260;
1440         aic_insb(aic, ID, chip_id, sizeof(chip_id) - 1);
1441         chip_id[sizeof(chip_id) - 1] = '\0';
1442         for (i = 0; i < sizeof(aic_chip_ids) / sizeof(aic_chip_ids[0]); i++) {
1443                 if (!strcmp(chip_id, aic_chip_ids[i].idstring)) {
1444                         aic->chip_type = aic_chip_ids[i].type;
1445                         break;
1446                 }
1447         }
1448
1449         porta = aic_inb(aic, PORTA);
1450         portb = aic_inb(aic, PORTB);
1451
1452         aic->initiator = PORTA_ID(porta);
1453         if (PORTA_PARITY(porta))
1454                 aic->flags |= AIC_PARITY_ENABLE;
1455         if (PORTB_DISC(portb))
1456                 aic->flags |= AIC_DISC_ENABLE;
1457         if (PORTB_DMA(portb))
1458                 aic->flags |= AIC_DMA_ENABLE;
1459
1460         /*
1461          * We can do fast SCSI (10MHz clock rate) if bit 4 of portb
1462          * is set and we've got a 6360.  The 6260 can only do standard
1463          * 5MHz SCSI.
1464          */
1465         if (aic->chip_type > AIC6260 || aic_inb(aic, REV)) {
1466                 if (PORTB_FSYNC(portb))
1467                         aic->flags |= AIC_FAST_ENABLE;
1468                 aic->flags |= AIC_DWIO_ENABLE;
1469         }
1470
1471         if (aic->flags & AIC_FAST_ENABLE)
1472                 aic->max_period = AIC_FAST_SYNC_PERIOD;
1473         else
1474                 aic->max_period = AIC_SYNC_PERIOD;
1475         aic->min_period = AIC_MIN_SYNC_PERIOD;
1476
1477         free_scbs = NULL;
1478         for (i = 255; i >= 0; i--) {
1479                 scb = &aic->scbs[i];
1480                 scb->tag = i;
1481                 aic_free_scb(aic, scb);
1482         }
1483
1484         for (i = 0; i < 8; i++) {
1485                 if (i == aic->initiator)
1486                         continue;
1487                 ti = &aic->tinfo[i];
1488                 bzero(ti, sizeof(*ti));
1489                 ti->flags = TINFO_TAG_ENB;
1490                 if (aic->flags & AIC_DISC_ENABLE)
1491                         ti->flags |= TINFO_DISC_ENB;
1492                 ti->user.period = aic->max_period;
1493                 ti->user.offset = AIC_SYNC_OFFSET;
1494                 ti->scsirate = 0;
1495         }
1496
1497         aic_outb(aic, DMACNTRL0, INTEN);
1498 }
1499
1500 int
1501 aic_probe(struct aic_softc *aic)
1502 {
1503         int i;
1504
1505         /* Remove aic6360 from possible powerdown mode */
1506         aic_outb(aic, DMACNTRL0, 0);
1507
1508 #define STSIZE  16
1509         aic_outb(aic, DMACNTRL1, 0);    /* Reset stack pointer */
1510         for (i = 0; i < STSIZE; i++)
1511                 aic_outb(aic, STACK, i);
1512
1513         /* See if we can pull out the same sequence */
1514         aic_outb(aic, DMACNTRL1, 0);
1515         for (i = 0; i < STSIZE && aic_inb(aic, STACK) == i; i++)
1516                 ;
1517         if (i != STSIZE)
1518                 return (ENXIO);
1519 #undef  STSIZE
1520         return (0);
1521 }
1522
1523 int
1524 aic_attach(struct aic_softc *aic)
1525 {
1526         /*
1527          * Construct our SIM entry
1528          */
1529         aic->sim = cam_sim_alloc(aic_action, aic_poll, "aic", aic,
1530                                  aic->unit, &sim_mplock, 2, 256, NULL);
1531         if (aic->sim == NULL)
1532                 return (ENOMEM);
1533
1534         if (xpt_bus_register(aic->sim, 0) != CAM_SUCCESS) {
1535                 cam_sim_free(aic->sim);
1536                 return (ENXIO);
1537         }
1538
1539         if (xpt_create_path(&aic->path, /*periph*/NULL,
1540                             cam_sim_path(aic->sim), CAM_TARGET_WILDCARD,
1541                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
1542                 xpt_bus_deregister(cam_sim_path(aic->sim));
1543                 cam_sim_free(aic->sim);
1544                 return (ENXIO);
1545         }
1546
1547         aic_init(aic);
1548
1549         kprintf("aic%d: %s", aic->unit, aic_chip_names[aic->chip_type]);
1550         if (aic->flags & AIC_DMA_ENABLE)
1551                 kprintf(", dma");
1552         if (aic->flags & AIC_DISC_ENABLE)
1553                 kprintf(", disconnection");
1554         if (aic->flags & AIC_PARITY_ENABLE)
1555                 kprintf(", parity check");
1556         if (aic->flags & AIC_FAST_ENABLE)
1557                 kprintf(", fast SCSI");
1558         kprintf("\n");
1559         return (0);
1560 }
1561
1562 int
1563 aic_detach(struct aic_softc *aic)
1564 {
1565         xpt_async(AC_LOST_DEVICE, aic->path, NULL);
1566         xpt_free_path(aic->path);
1567         xpt_bus_deregister(cam_sim_path(aic->sim));
1568         cam_sim_free(aic->sim);
1569         return (0);
1570 }