sys/dev/aic7xxx/aic7xxx.c

   1 /*-
   2  * Core routines and tables shareable across OS platforms.
   3  *
   4  * Copyright (c) 1994-2002 Justin T. Gibbs.
   5  * Copyright (c) 2000-2002 Adaptec Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification.
  14  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  15  *    substantially similar to the "NO WARRANTY" disclaimer below
  16  *    ("Disclaimer") and any redistribution must be conditioned upon
  17  *    including a substantially similar Disclaimer requirement for further
  18  *    binary redistribution.
  19  * 3. Neither the names of the above-listed copyright holders nor the names
  20  *    of any contributors may be used to endorse or promote products derived
  21  *    from this software without specific prior written permission.
  22  *
  23  * Alternatively, this software may be distributed under the terms of the
  24  * GNU General Public License ("GPL") version 2 as published by the Free
  25  * Software Foundation.
  26  *
  27  * NO WARRANTY
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  32  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  36  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  37  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38  * POSSIBILITY OF SUCH DAMAGES.
  39  *
  40  * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.c#155 $
  41  */
  42
  43 #ifdef __linux__
  44 #include "aic7xxx_osm.h"
  45 #include "aic7xxx_inline.h"
  46 #include "aicasm/aicasm_insformat.h"
  47 #else
  48 #include <sys/cdefs.h>
  49 __FBSDID("$FreeBSD$");
  50 #include <dev/aic7xxx/aic7xxx_osm.h>
  51 #include <dev/aic7xxx/aic7xxx_inline.h>
  52 #include <dev/aic7xxx/aicasm/aicasm_insformat.h>
  53 #endif
  54
  55 /****************************** Softc Data ************************************/
  56 struct ahc_softc_tailq ahc_tailq = TAILQ_HEAD_INITIALIZER(ahc_tailq);
  57
  58 /***************************** Lookup Tables **********************************/
  59 char *ahc_chip_names[] =
  60 {
  61         "NONE",
  62         "aic7770",
  63         "aic7850",
  64         "aic7855",
  65         "aic7859",
  66         "aic7860",
  67         "aic7870",
  68         "aic7880",
  69         "aic7895",
  70         "aic7895C",
  71         "aic7890/91",
  72         "aic7896/97",
  73         "aic7892",
  74         "aic7899"
  75 };
  76 static const u_int num_chip_names = NUM_ELEMENTS(ahc_chip_names);
  77
  78 /*
  79  * Hardware error codes.
  80  */
  81 struct ahc_hard_error_entry {
  82         uint8_t errno;
  83         char *errmesg;
  84 };
  85
  86 static struct ahc_hard_error_entry ahc_hard_errors[] = {
  87         { ILLHADDR,     "Illegal Host Access" },
  88         { ILLSADDR,     "Illegal Sequencer Address referrenced" },
  89         { ILLOPCODE,    "Illegal Opcode in sequencer program" },
  90         { SQPARERR,     "Sequencer Parity Error" },
  91         { DPARERR,      "Data-path Parity Error" },
  92         { MPARERR,      "Scratch or SCB Memory Parity Error" },
  93         { PCIERRSTAT,   "PCI Error detected" },
  94         { CIOPARERR,    "CIOBUS Parity Error" },
  95 };
  96 static const u_int num_errors = NUM_ELEMENTS(ahc_hard_errors);
  97
  98 static struct ahc_phase_table_entry ahc_phase_table[] =
  99 {
 100         { P_DATAOUT,    MSG_NOOP,               "in Data-out phase"     },
 101         { P_DATAIN,     MSG_INITIATOR_DET_ERR,  "in Data-in phase"      },
 102         { P_DATAOUT_DT, MSG_NOOP,               "in DT Data-out phase"  },
 103         { P_DATAIN_DT,  MSG_INITIATOR_DET_ERR,  "in DT Data-in phase"   },
 104         { P_COMMAND,    MSG_NOOP,               "in Command phase"      },
 105         { P_MESGOUT,    MSG_NOOP,               "in Message-out phase"  },
 106         { P_STATUS,     MSG_INITIATOR_DET_ERR,  "in Status phase"       },
 107         { P_MESGIN,     MSG_PARITY_ERROR,       "in Message-in phase"   },
 108         { P_BUSFREE,    MSG_NOOP,               "while idle"            },
 109         { 0,            MSG_NOOP,               "in unknown phase"      }
 110 };
 111
 112 /*
 113  * In most cases we only wish to itterate over real phases, so
 114  * exclude the last element from the count.
 115  */
 116 static const u_int num_phases = NUM_ELEMENTS(ahc_phase_table) - 1;
 117
 118 /*
 119  * Valid SCSIRATE values.  (p. 3-17)
 120  * Provides a mapping of tranfer periods in ns to the proper value to
 121  * stick in the scsixfer reg.
 122  */
 123 static struct ahc_syncrate ahc_syncrates[] =
 124 {
 125       /* ultra2    fast/ultra  period     rate */
 126         { 0x42,      0x000,      9,      "80.0" },
 127         { 0x03,      0x000,     10,      "40.0" },
 128         { 0x04,      0x000,     11,      "33.0" },
 129         { 0x05,      0x100,     12,      "20.0" },
 130         { 0x06,      0x110,     15,      "16.0" },
 131         { 0x07,      0x120,     18,      "13.4" },
 132         { 0x08,      0x000,     25,      "10.0" },
 133         { 0x19,      0x010,     31,      "8.0"  },
 134         { 0x1a,      0x020,     37,      "6.67" },
 135         { 0x1b,      0x030,     43,      "5.7"  },
 136         { 0x1c,      0x040,     50,      "5.0"  },
 137         { 0x00,      0x050,     56,      "4.4"  },
 138         { 0x00,      0x060,     62,      "4.0"  },
 139         { 0x00,      0x070,     68,      "3.6"  },
 140         { 0x00,      0x000,      0,      NULL   }
 141 };
 142
 143 /* Our Sequencer Program */
 144 #include "aic7xxx_seq.h"
 145
 146 /**************************** Function Declarations ***************************/
 147 static void             ahc_force_renegotiation(struct ahc_softc *ahc,
 148                                                 struct ahc_devinfo *devinfo);
 149 static struct ahc_tmode_tstate*
 150                         ahc_alloc_tstate(struct ahc_softc *ahc,
 151                                          u_int scsi_id, char channel);
 152 #ifdef AHC_TARGET_MODE
 153 static void             ahc_free_tstate(struct ahc_softc *ahc,
 154                                         u_int scsi_id, char channel, int force);
 155 #endif
 156 static struct ahc_syncrate*
 157                         ahc_devlimited_syncrate(struct ahc_softc *ahc,
 158                                                 struct ahc_initiator_tinfo *,
 159                                                 u_int *period,
 160                                                 u_int *ppr_options,
 161                                                 role_t role);
 162 static void             ahc_update_pending_scbs(struct ahc_softc *ahc);
 163 static void             ahc_fetch_devinfo(struct ahc_softc *ahc,
 164                                           struct ahc_devinfo *devinfo);
 165 static void             ahc_scb_devinfo(struct ahc_softc *ahc,
 166                                         struct ahc_devinfo *devinfo,
 167                                         struct scb *scb);
 168 static void             ahc_assert_atn(struct ahc_softc *ahc);
 169 static void             ahc_setup_initiator_msgout(struct ahc_softc *ahc,
 170                                                    struct ahc_devinfo *devinfo,
 171                                                    struct scb *scb);
 172 static void             ahc_build_transfer_msg(struct ahc_softc *ahc,
 173                                                struct ahc_devinfo *devinfo);
 174 static void             ahc_construct_sdtr(struct ahc_softc *ahc,
 175                                            struct ahc_devinfo *devinfo,
 176                                            u_int period, u_int offset);
 177 static void             ahc_construct_wdtr(struct ahc_softc *ahc,
 178                                            struct ahc_devinfo *devinfo,
 179                                            u_int bus_width);
 180 static void             ahc_construct_ppr(struct ahc_softc *ahc,
 181                                           struct ahc_devinfo *devinfo,
 182                                           u_int period, u_int offset,
 183                                           u_int bus_width, u_int ppr_options);
 184 static void             ahc_clear_msg_state(struct ahc_softc *ahc);
 185 static void             ahc_handle_proto_violation(struct ahc_softc *ahc);
 186 static void             ahc_handle_message_phase(struct ahc_softc *ahc);
 187 typedef enum {
 188         AHCMSG_1B,
 189         AHCMSG_2B,
 190         AHCMSG_EXT
 191 } ahc_msgtype;
 192 static int              ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type,
 193                                      u_int msgval, int full);
 194 static int              ahc_parse_msg(struct ahc_softc *ahc,
 195                                       struct ahc_devinfo *devinfo);
 196 static int              ahc_handle_msg_reject(struct ahc_softc *ahc,
 197                                               struct ahc_devinfo *devinfo);
 198 static void             ahc_handle_ign_wide_residue(struct ahc_softc *ahc,
 199                                                 struct ahc_devinfo *devinfo);
 200 static void             ahc_reinitialize_dataptrs(struct ahc_softc *ahc);
 201 static void             ahc_handle_devreset(struct ahc_softc *ahc,
 202                                             struct ahc_devinfo *devinfo,
 203                                             cam_status status, char *message,
 204                                             int verbose_level);
 205 #ifdef AHC_TARGET_MODE
 206 static void             ahc_setup_target_msgin(struct ahc_softc *ahc,
 207                                                struct ahc_devinfo *devinfo,
 208                                                struct scb *scb);
 209 #endif
 210
 211 static bus_dmamap_callback_t    ahc_dmamap_cb;
 212 static void                     ahc_build_free_scb_list(struct ahc_softc *ahc);
 213 static int                      ahc_init_scbdata(struct ahc_softc *ahc);
 214 static void                     ahc_fini_scbdata(struct ahc_softc *ahc);
 215 static void             ahc_qinfifo_requeue(struct ahc_softc *ahc,
 216                                             struct scb *prev_scb,
 217                                             struct scb *scb);
 218 static int              ahc_qinfifo_count(struct ahc_softc *ahc);
 219 static u_int            ahc_rem_scb_from_disc_list(struct ahc_softc *ahc,
 220                                                    u_int prev, u_int scbptr);
 221 static void             ahc_add_curscb_to_free_list(struct ahc_softc *ahc);
 222 static u_int            ahc_rem_wscb(struct ahc_softc *ahc,
 223                                      u_int scbpos, u_int prev);
 224 static void             ahc_reset_current_bus(struct ahc_softc *ahc);
 225 #ifdef AHC_DUMP_SEQ
 226 static void             ahc_dumpseq(struct ahc_softc *ahc);
 227 #endif
 228 static int              ahc_loadseq(struct ahc_softc *ahc);
 229 static int              ahc_check_patch(struct ahc_softc *ahc,
 230                                         struct patch **start_patch,
 231                                         u_int start_instr, u_int *skip_addr);
 232 static void             ahc_download_instr(struct ahc_softc *ahc,
 233                                            u_int instrptr, uint8_t *dconsts);
 234 static int              ahc_other_scb_timeout(struct ahc_softc *ahc,
 235                                               struct scb *scb,
 236                                               struct scb *other_scb);
 237 #ifdef AHC_TARGET_MODE
 238 static void             ahc_queue_lstate_event(struct ahc_softc *ahc,
 239                                                struct ahc_tmode_lstate *lstate,
 240                                                u_int initiator_id,
 241                                                u_int event_type,
 242                                                u_int event_arg);
 243 static void             ahc_update_scsiid(struct ahc_softc *ahc,
 244                                           u_int targid_mask);
 245 static int              ahc_handle_target_cmd(struct ahc_softc *ahc,
 246                                               struct target_cmd *cmd);
 247 #endif
 248 /************************* Sequencer Execution Control ************************/
 249 /*
 250  * Restart the sequencer program from address zero
 251  */
 252 void
 253 ahc_restart(struct ahc_softc *ahc)
 254 {
 255
 256         ahc_pause(ahc);
 257
 258         /* No more pending messages. */
 259         ahc_clear_msg_state(ahc);
 260
 261         ahc_outb(ahc, SCSISIGO, 0);             /* De-assert BSY */
 262         ahc_outb(ahc, MSG_OUT, MSG_NOOP);       /* No message to send */
 263         ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
 264         ahc_outb(ahc, LASTPHASE, P_BUSFREE);
 265         ahc_outb(ahc, SAVED_SCSIID, 0xFF);
 266         ahc_outb(ahc, SAVED_LUN, 0xFF);
 267
 268         /*
 269          * Ensure that the sequencer's idea of TQINPOS
 270          * matches our own.  The sequencer increments TQINPOS
 271          * only after it sees a DMA complete and a reset could
 272          * occur before the increment leaving the kernel to believe
 273          * the command arrived but the sequencer to not.
 274          */
 275         ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
 276
 277         /* Always allow reselection */
 278         ahc_outb(ahc, SCSISEQ,
 279                  ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP));
 280         if ((ahc->features & AHC_CMD_CHAN) != 0) {
 281                 /* Ensure that no DMA operations are in progress */
 282                 ahc_outb(ahc, CCSCBCNT, 0);
 283                 ahc_outb(ahc, CCSGCTL, 0);
 284                 ahc_outb(ahc, CCSCBCTL, 0);
 285         }
 286         /*
 287          * If we were in the process of DMA'ing SCB data into
 288          * an SCB, replace that SCB on the free list.  This prevents
 289          * an SCB leak.
 290          */
 291         if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) {
 292                 ahc_add_curscb_to_free_list(ahc);
 293                 ahc_outb(ahc, SEQ_FLAGS2,
 294                          ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA);
 295         }
 296
 297         /*
 298          * Clear any pending sequencer interrupt.  It is no
 299          * longer relevant since we're resetting the Program
 300          * Counter.
 301          */
 302         ahc_outb(ahc, CLRINT, CLRSEQINT);
 303
 304         ahc_outb(ahc, MWI_RESIDUAL, 0);
 305         ahc_outb(ahc, SEQCTL, ahc->seqctl);
 306         ahc_outb(ahc, SEQADDR0, 0);
 307         ahc_outb(ahc, SEQADDR1, 0);
 308
 309         ahc_unpause(ahc);
 310 }
 311
 312 /************************* Input/Output Queues ********************************/
 313 void
 314 ahc_run_qoutfifo(struct ahc_softc *ahc)
 315 {
 316         struct scb *scb;
 317         u_int  scb_index;
 318
 319         ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
 320         while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) {
 321
 322                 scb_index = ahc->qoutfifo[ahc->qoutfifonext];
 323                 if ((ahc->qoutfifonext & 0x03) == 0x03) {
 324                         u_int modnext;
 325
 326                         /*
 327                          * Clear 32bits of QOUTFIFO at a time
 328                          * so that we don't clobber an incoming
 329                          * byte DMA to the array on architectures
 330                          * that only support 32bit load and store
 331                          * operations.
 332                          */
 333                         modnext = ahc->qoutfifonext & ~0x3;
 334                         *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL;
 335                         aic_dmamap_sync(ahc, ahc->shared_data_dmat,
 336                                         ahc->shared_data_dmamap,
 337                                         /*offset*/modnext, /*len*/4,
 338                                         BUS_DMASYNC_PREREAD);
 339                 }
 340                 ahc->qoutfifonext++;
 341
 342                 scb = ahc_lookup_scb(ahc, scb_index);
 343                 if (scb == NULL) {
 344                         printf("%s: WARNING no command for scb %d "
 345                                "(cmdcmplt)\nQOUTPOS = %d\n",
 346                                ahc_name(ahc), scb_index,
 347                                (ahc->qoutfifonext - 1) & 0xFF);
 348                         continue;
 349                 }
 350
 351                 /*
 352                  * Save off the residual
 353                  * if there is one.
 354                  */
 355                 ahc_update_residual(ahc, scb);
 356                 ahc_done(ahc, scb);
 357         }
 358 }
 359
 360 void
 361 ahc_run_untagged_queues(struct ahc_softc *ahc)
 362 {
 363         int i;
 364
 365         for (i = 0; i < 16; i++)
 366                 ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]);
 367 }
 368
 369 void
 370 ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue)
 371 {
 372         struct scb *scb;
 373
 374         if (ahc->untagged_queue_lock != 0)
 375                 return;
 376
 377         if ((scb = TAILQ_FIRST(queue)) != NULL
 378          && (scb->flags & SCB_ACTIVE) == 0) {
 379                 scb->flags |= SCB_ACTIVE;
 380                 /*
 381                  * Timers are disabled while recovery is in progress.
 382                  */
 383                 aic_scb_timer_start(scb);
 384                 ahc_queue_scb(ahc, scb);
 385         }
 386 }
 387
 388 /************************* Interrupt Handling *********************************/
 389 void
 390 ahc_handle_brkadrint(struct ahc_softc *ahc)
 391 {
 392         /*
 393          * We upset the sequencer :-(
 394          * Lookup the error message
 395          */
 396         int i;
 397         int error;
 398
 399         error = ahc_inb(ahc, ERROR);
 400         for (i = 0; error != 1 && i < num_errors; i++)
 401                 error >>= 1;
 402         printf("%s: brkadrint, %s at seqaddr = 0x%x\n",
 403                ahc_name(ahc), ahc_hard_errors[i].errmesg,
 404                ahc_inb(ahc, SEQADDR0) |
 405                (ahc_inb(ahc, SEQADDR1) << 8));
 406
 407         ahc_dump_card_state(ahc);
 408
 409         /* Tell everyone that this HBA is no longer available */
 410         ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
 411                        CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN,
 412                        CAM_NO_HBA);
 413
 414         /* Disable all interrupt sources by resetting the controller */
 415         ahc_shutdown(ahc);
 416 }
 417
 418 void
 419 ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat)
 420 {
 421         struct scb *scb;
 422         struct ahc_devinfo devinfo;
 423
 424         ahc_fetch_devinfo(ahc, &devinfo);
 425
 426         /*
 427          * Clear the upper byte that holds SEQINT status
 428          * codes and clear the SEQINT bit. We will unpause
 429          * the sequencer, if appropriate, after servicing
 430          * the request.
 431          */
 432         ahc_outb(ahc, CLRINT, CLRSEQINT);
 433         switch (intstat & SEQINT_MASK) {
 434         case BAD_STATUS:
 435         {
 436                 u_int  scb_index;
 437                 struct hardware_scb *hscb;
 438
 439                 /*
 440                  * Set the default return value to 0 (don't
 441                  * send sense).  The sense code will change
 442                  * this if needed.
 443                  */
 444                 ahc_outb(ahc, RETURN_1, 0);
 445
 446                 /*
 447                  * The sequencer will notify us when a command
 448                  * has an error that would be of interest to
 449                  * the kernel.  This allows us to leave the sequencer
 450                  * running in the common case of command completes
 451                  * without error.  The sequencer will already have
 452                  * dma'd the SCB back up to us, so we can reference
 453                  * the in kernel copy directly.
 454                  */
 455                 scb_index = ahc_inb(ahc, SCB_TAG);
 456                 scb = ahc_lookup_scb(ahc, scb_index);
 457                 if (scb == NULL) {
 458                         ahc_print_devinfo(ahc, &devinfo);
 459                         printf("ahc_intr - referenced scb "
 460                                "not valid during seqint 0x%x scb(%d)\n",
 461                                intstat, scb_index);
 462                         ahc_dump_card_state(ahc);
 463                         panic("for safety");
 464                         goto unpause;
 465                 }
 466
 467                 hscb = scb->hscb;
 468
 469                 /* Don't want to clobber the original sense code */
 470                 if ((scb->flags & SCB_SENSE) != 0) {
 471                         /*
 472                          * Clear the SCB_SENSE Flag and have
 473                          * the sequencer do a normal command
 474                          * complete.
 475                          */
 476                         scb->flags &= ~SCB_SENSE;
 477                         aic_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
 478                         break;
 479                 }
 480                 aic_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR);
 481                 /* Freeze the queue until the client sees the error. */
 482                 ahc_freeze_devq(ahc, scb);
 483                 aic_freeze_scb(scb);
 484                 aic_set_scsi_status(scb, hscb->shared_data.status.scsi_status);
 485                 switch (hscb->shared_data.status.scsi_status) {
 486                 case SCSI_STATUS_OK:
 487                         printf("%s: Interrupted for staus of 0???\n",
 488                                ahc_name(ahc));
 489                         break;
 490                 case SCSI_STATUS_CMD_TERMINATED:
 491                 case SCSI_STATUS_CHECK_COND:
 492                 {
 493                         struct ahc_dma_seg *sg;
 494                         struct scsi_sense *sc;
 495                         struct ahc_initiator_tinfo *targ_info;
 496                         struct ahc_tmode_tstate *tstate;
 497                         struct ahc_transinfo *tinfo;
 498 #ifdef AHC_DEBUG
 499                         if (ahc_debug & AHC_SHOW_SENSE) {
 500                                 ahc_print_path(ahc, scb);
 501                                 printf("SCB %d: requests Check Status\n",
 502                                        scb->hscb->tag);
 503                         }
 504 #endif
 505
 506                         if (aic_perform_autosense(scb) == 0)
 507                                 break;
 508
 509                         targ_info = ahc_fetch_transinfo(ahc,
 510                                                         devinfo.channel,
 511                                                         devinfo.our_scsiid,
 512                                                         devinfo.target,
 513                                                         &tstate);
 514                         tinfo = &targ_info->curr;
 515                         sg = scb->sg_list;
 516                         sc = (struct scsi_sense *)(&hscb->shared_data.cdb);
 517                         /*
 518                          * Save off the residual if there is one.
 519                          */
 520                         ahc_update_residual(ahc, scb);
 521 #ifdef AHC_DEBUG
 522                         if (ahc_debug & AHC_SHOW_SENSE) {
 523                                 ahc_print_path(ahc, scb);
 524                                 printf("Sending Sense\n");
 525                         }
 526 #endif
 527                         sg->addr = ahc_get_sense_bufaddr(ahc, scb);
 528                         sg->len = aic_get_sense_bufsize(ahc, scb);
 529                         sg->len |= AHC_DMA_LAST_SEG;
 530
 531                         /* Fixup byte order */
 532                         sg->addr = aic_htole32(sg->addr);
 533                         sg->len = aic_htole32(sg->len);
 534
 535                         sc->opcode = REQUEST_SENSE;
 536                         sc->byte2 = 0;
 537                         if (tinfo->protocol_version <= SCSI_REV_2
 538                          && SCB_GET_LUN(scb) < 8)
 539                                 sc->byte2 = SCB_GET_LUN(scb) << 5;
 540                         sc->unused[0] = 0;
 541                         sc->unused[1] = 0;
 542                         sc->length = sg->len;
 543                         sc->control = 0;
 544
 545                         /*
 546                          * We can't allow the target to disconnect.
 547                          * This will be an untagged transaction and
 548                          * having the target disconnect will make this
 549                          * transaction indestinguishable from outstanding
 550                          * tagged transactions.
 551                          */
 552                         hscb->control = 0;
 553
 554                         /*
 555                          * This request sense could be because the
 556                          * the device lost power or in some other
 557                          * way has lost our transfer negotiations.
 558                          * Renegotiate if appropriate.  Unit attention
 559                          * errors will be reported before any data
 560                          * phases occur.
 561                          */
 562                         if (aic_get_residual(scb)
 563                          == aic_get_transfer_length(scb)) {
 564                                 ahc_update_neg_request(ahc, &devinfo,
 565                                                        tstate, targ_info,
 566                                                        AHC_NEG_IF_NON_ASYNC);
 567                         }
 568                         if (tstate->auto_negotiate & devinfo.target_mask) {
 569                                 hscb->control |= MK_MESSAGE;
 570                                 scb->flags &= ~SCB_NEGOTIATE;
 571                                 scb->flags |= SCB_AUTO_NEGOTIATE;
 572                         }
 573                         hscb->cdb_len = sizeof(*sc);
 574                         hscb->dataptr = sg->addr;
 575                         hscb->datacnt = sg->len;
 576                         hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID;
 577                         hscb->sgptr = aic_htole32(hscb->sgptr);
 578                         scb->sg_count = 1;
 579                         scb->flags |= SCB_SENSE;
 580                         ahc_qinfifo_requeue_tail(ahc, scb);
 581                         ahc_outb(ahc, RETURN_1, SEND_SENSE);
 582                         /*
 583                          * Ensure we have enough time to actually
 584                          * retrieve the sense, but only schedule
 585                          * the timer if we are not in recovery or
 586                          * this is a recovery SCB that is allowed
 587                          * to have an active timer.
 588                          */
 589                         if (ahc->scb_data->recovery_scbs == 0
 590                          || (scb->flags & SCB_RECOVERY_SCB) != 0)
 591                                 aic_scb_timer_reset(scb, 5 * 1000);
 592                         break;
 593                 }
 594                 default:
 595                         break;
 596                 }
 597                 break;
 598         }
 599         case NO_MATCH:
 600         {
 601                 /* Ensure we don't leave the selection hardware on */
 602                 ahc_outb(ahc, SCSISEQ,
 603                          ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
 604
 605                 printf("%s:%c:%d: no active SCB for reconnecting "
 606                        "target - issuing BUS DEVICE RESET\n",
 607                        ahc_name(ahc), devinfo.channel, devinfo.target);
 608                 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
 609                        "ARG_1 == 0x%x ACCUM = 0x%x\n",
 610                        ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
 611                        ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
 612                 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
 613                        "SINDEX == 0x%x\n",
 614                        ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
 615                        ahc_index_busy_tcl(ahc,
 616                             BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
 617                                       ahc_inb(ahc, SAVED_LUN))),
 618                        ahc_inb(ahc, SINDEX));
 619                 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
 620                        "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
 621                        ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
 622                        ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
 623                        ahc_inb(ahc, SCB_CONTROL));
 624                 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
 625                        ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
 626                 printf("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0));
 627                 printf("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL));
 628                 ahc_dump_card_state(ahc);
 629                 ahc->msgout_buf[0] = MSG_BUS_DEV_RESET;
 630                 ahc->msgout_len = 1;
 631                 ahc->msgout_index = 0;
 632                 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
 633                 ahc_outb(ahc, MSG_OUT, HOST_MSG);
 634                 ahc_assert_atn(ahc);
 635                 break;
 636         }
 637         case SEND_REJECT:
 638         {
 639                 u_int rejbyte = ahc_inb(ahc, ACCUM);
 640                 printf("%s:%c:%d: Warning - unknown message received from "
 641                        "target (0x%x).  Rejecting\n",
 642                        ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte);
 643                 break;
 644         }
 645         case PROTO_VIOLATION:
 646         {
 647                 ahc_handle_proto_violation(ahc);
 648                 break;
 649         }
 650         case IGN_WIDE_RES:
 651                 ahc_handle_ign_wide_residue(ahc, &devinfo);
 652                 break;
 653         case PDATA_REINIT:
 654                 ahc_reinitialize_dataptrs(ahc);
 655                 break;
 656         case BAD_PHASE:
 657         {
 658                 u_int lastphase;
 659
 660                 lastphase = ahc_inb(ahc, LASTPHASE);
 661                 printf("%s:%c:%d: unknown scsi bus phase %x, "
 662                        "lastphase = 0x%x.  Attempting to continue\n",
 663                        ahc_name(ahc), devinfo.channel, devinfo.target,
 664                        lastphase, ahc_inb(ahc, SCSISIGI));
 665                 break;
 666         }
 667         case MISSED_BUSFREE:
 668         {
 669                 u_int lastphase;
 670
 671                 lastphase = ahc_inb(ahc, LASTPHASE);
 672                 printf("%s:%c:%d: Missed busfree. "
 673                        "Lastphase = 0x%x, Curphase = 0x%x\n",
 674                        ahc_name(ahc), devinfo.channel, devinfo.target,
 675                        lastphase, ahc_inb(ahc, SCSISIGI));
 676                 ahc_restart(ahc);
 677                 return;
 678         }
 679         case HOST_MSG_LOOP:
 680         {
 681                 /*
 682                  * The sequencer has encountered a message phase
 683                  * that requires host assistance for completion.
 684                  * While handling the message phase(s), we will be
 685                  * notified by the sequencer after each byte is
 686                  * transfered so we can track bus phase changes.
 687                  *
 688                  * If this is the first time we've seen a HOST_MSG_LOOP
 689                  * interrupt, initialize the state of the host message
 690                  * loop.
 691                  */
 692                 if (ahc->msg_type == MSG_TYPE_NONE) {
 693                         struct scb *scb;
 694                         u_int scb_index;
 695                         u_int bus_phase;
 696
 697                         bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
 698                         if (bus_phase != P_MESGIN
 699                          && bus_phase != P_MESGOUT) {
 700                                 printf("ahc_intr: HOST_MSG_LOOP bad "
 701                                        "phase 0x%x\n",
 702                                       bus_phase);
 703                                 /*
 704                                  * Probably transitioned to bus free before
 705                                  * we got here.  Just punt the message.
 706                                  */
 707                                 ahc_clear_intstat(ahc);
 708                                 ahc_restart(ahc);
 709                                 return;
 710                         }
 711
 712                         scb_index = ahc_inb(ahc, SCB_TAG);
 713                         scb = ahc_lookup_scb(ahc, scb_index);
 714                         if (devinfo.role == ROLE_INITIATOR) {
 715                                 if (scb == NULL)
 716                                         panic("HOST_MSG_LOOP with "
 717                                               "invalid SCB %x\n", scb_index);
 718
 719                                 if (bus_phase == P_MESGOUT)
 720                                         ahc_setup_initiator_msgout(ahc,
 721                                                                    &devinfo,
 722                                                                    scb);
 723                                 else {
 724                                         ahc->msg_type =
 725                                             MSG_TYPE_INITIATOR_MSGIN;
 726                                         ahc->msgin_index = 0;
 727                                 }
 728                         }
 729 #ifdef AHC_TARGET_MODE
 730                         else {
 731                                 if (bus_phase == P_MESGOUT) {
 732                                         ahc->msg_type =
 733                                             MSG_TYPE_TARGET_MSGOUT;
 734                                         ahc->msgin_index = 0;
 735                                 }
 736                                 else
 737                                         ahc_setup_target_msgin(ahc,
 738                                                                &devinfo,
 739                                                                scb);
 740                         }
 741 #endif
 742                 }
 743
 744                 ahc_handle_message_phase(ahc);
 745                 break;
 746         }
 747         case PERR_DETECTED:
 748         {
 749                 /*
 750                  * If we've cleared the parity error interrupt
 751                  * but the sequencer still believes that SCSIPERR
 752                  * is true, it must be that the parity error is
 753                  * for the currently presented byte on the bus,
 754                  * and we are not in a phase (data-in) where we will
 755                  * eventually ack this byte.  Ack the byte and
 756                  * throw it away in the hope that the target will
 757                  * take us to message out to deliver the appropriate
 758                  * error message.
 759                  */
 760                 if ((intstat & SCSIINT) == 0
 761                  && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) {
 762
 763                         if ((ahc->features & AHC_DT) == 0) {
 764                                 u_int curphase;
 765
 766                                 /*
 767                                  * The hardware will only let you ack bytes
 768                                  * if the expected phase in SCSISIGO matches
 769                                  * the current phase.  Make sure this is
 770                                  * currently the case.
 771                                  */
 772                                 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
 773                                 ahc_outb(ahc, LASTPHASE, curphase);
 774                                 ahc_outb(ahc, SCSISIGO, curphase);
 775                         }
 776                         if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) {
 777                                 int wait;
 778
 779                                 /*
 780                                  * In a data phase.  Faster to bitbucket
 781                                  * the data than to individually ack each
 782                                  * byte.  This is also the only strategy
 783                                  * that will work with AUTOACK enabled.
 784                                  */
 785                                 ahc_outb(ahc, SXFRCTL1,
 786                                          ahc_inb(ahc, SXFRCTL1) | BITBUCKET);
 787                                 wait = 5000;
 788                                 while (--wait != 0) {
 789                                         if ((ahc_inb(ahc, SCSISIGI)
 790                                           & (CDI|MSGI)) != 0)
 791                                                 break;
 792                                         aic_delay(100);
 793                                 }
 794                                 ahc_outb(ahc, SXFRCTL1,
 795                                          ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
 796                                 if (wait == 0) {
 797                                         struct  scb *scb;
 798                                         u_int   scb_index;
 799
 800                                         ahc_print_devinfo(ahc, &devinfo);
 801                                         printf("Unable to clear parity error.  "
 802                                                "Resetting bus.\n");
 803                                         scb_index = ahc_inb(ahc, SCB_TAG);
 804                                         scb = ahc_lookup_scb(ahc, scb_index);
 805                                         if (scb != NULL)
 806                                                 aic_set_transaction_status(scb,
 807                                                     CAM_UNCOR_PARITY);
 808                                         ahc_reset_channel(ahc, devinfo.channel,
 809                                                           /*init reset*/TRUE);
 810                                 }
 811                         } else {
 812                                 ahc_inb(ahc, SCSIDATL);
 813                         }
 814                 }
 815                 break;
 816         }
 817         case DATA_OVERRUN:
 818         {
 819                 /*
 820                  * When the sequencer detects an overrun, it
 821                  * places the controller in "BITBUCKET" mode
 822                  * and allows the target to complete its transfer.
 823                  * Unfortunately, none of the counters get updated
 824                  * when the controller is in this mode, so we have
 825                  * no way of knowing how large the overrun was.
 826                  */
 827                 u_int scbindex = ahc_inb(ahc, SCB_TAG);
 828                 u_int lastphase = ahc_inb(ahc, LASTPHASE);
 829                 u_int i;
 830
 831                 scb = ahc_lookup_scb(ahc, scbindex);
 832                 for (i = 0; i < num_phases; i++) {
 833                         if (lastphase == ahc_phase_table[i].phase)
 834                                 break;
 835                 }
 836                 ahc_print_path(ahc, scb);
 837                 printf("data overrun detected %s."
 838                        "  Tag == 0x%x.\n",
 839                        ahc_phase_table[i].phasemsg,
 840                        scb->hscb->tag);
 841                 ahc_print_path(ahc, scb);
 842                 printf("%s seen Data Phase.  Length = %ld.  NumSGs = %d.\n",
 843                        ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't",
 844                        aic_get_transfer_length(scb), scb->sg_count);
 845                 if (scb->sg_count > 0) {
 846                         for (i = 0; i < scb->sg_count; i++) {
 847
 848                                 printf("sg[%d] - Addr 0x%x%x : Length %d\n",
 849                                        i,
 850                                        (aic_le32toh(scb->sg_list[i].len) >> 24
 851                                         & SG_HIGH_ADDR_BITS),
 852                                        aic_le32toh(scb->sg_list[i].addr),
 853                                        aic_le32toh(scb->sg_list[i].len)
 854                                        & AHC_SG_LEN_MASK);
 855                         }
 856                 }
 857                 /*
 858                  * Set this and it will take effect when the
 859                  * target does a command complete.
 860                  */
 861                 ahc_freeze_devq(ahc, scb);
 862                 if ((scb->flags & SCB_SENSE) == 0) {
 863                         aic_set_transaction_status(scb, CAM_DATA_RUN_ERR);
 864                 } else {
 865                         scb->flags &= ~SCB_SENSE;
 866                         aic_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
 867                 }
 868                 aic_freeze_scb(scb);
 869
 870                 if ((ahc->features & AHC_ULTRA2) != 0) {
 871                         /*
 872                          * Clear the channel in case we return
 873                          * to data phase later.
 874                          */
 875                         ahc_outb(ahc, SXFRCTL0,
 876                                  ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
 877                         ahc_outb(ahc, SXFRCTL0,
 878                                  ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
 879                 }
 880                 if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
 881                         u_int dscommand1;
 882
 883                         /* Ensure HHADDR is 0 for future DMA operations. */
 884                         dscommand1 = ahc_inb(ahc, DSCOMMAND1);
 885                         ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
 886                         ahc_outb(ahc, HADDR, 0);
 887                         ahc_outb(ahc, DSCOMMAND1, dscommand1);
 888                 }
 889                 break;
 890         }
 891         case MKMSG_FAILED:
 892         {
 893                 u_int scbindex;
 894
 895                 printf("%s:%c:%d:%d: Attempt to issue message failed\n",
 896                        ahc_name(ahc), devinfo.channel, devinfo.target,
 897                        devinfo.lun);
 898                 scbindex = ahc_inb(ahc, SCB_TAG);
 899                 scb = ahc_lookup_scb(ahc, scbindex);
 900                 if (scb != NULL
 901                  && (scb->flags & SCB_RECOVERY_SCB) != 0)
 902                         /*
 903                          * Ensure that we didn't put a second instance of this
 904                          * SCB into the QINFIFO.
 905                          */
 906                         ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
 907                                            SCB_GET_CHANNEL(ahc, scb),
 908                                            SCB_GET_LUN(scb), scb->hscb->tag,
 909                                            ROLE_INITIATOR, /*status*/0,
 910                                            SEARCH_REMOVE);
 911                 break;
 912         }
 913         case NO_FREE_SCB:
 914         {
 915                 printf("%s: No free or disconnected SCBs\n", ahc_name(ahc));
 916                 ahc_dump_card_state(ahc);
 917                 panic("for safety");
 918                 break;
 919         }
 920         case SCB_MISMATCH:
 921         {
 922                 u_int scbptr;
 923
 924                 scbptr = ahc_inb(ahc, SCBPTR);
 925                 printf("Bogus TAG after DMA.  SCBPTR %d, tag %d, our tag %d\n",
 926                        scbptr, ahc_inb(ahc, ARG_1),
 927                        ahc->scb_data->hscbs[scbptr].tag);
 928                 ahc_dump_card_state(ahc);
 929                 panic("for saftey");
 930                 break;
 931         }
 932         case OUT_OF_RANGE:
 933         {
 934                 printf("%s: BTT calculation out of range\n", ahc_name(ahc));
 935                 printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
 936                        "ARG_1 == 0x%x ACCUM = 0x%x\n",
 937                        ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
 938                        ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
 939                 printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
 940                        "SINDEX == 0x%x\n, A == 0x%x\n",
 941                        ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
 942                        ahc_index_busy_tcl(ahc,
 943                             BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
 944                                       ahc_inb(ahc, SAVED_LUN))),
 945                        ahc_inb(ahc, SINDEX),
 946                        ahc_inb(ahc, ACCUM));
 947                 printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
 948                        "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
 949                        ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
 950                        ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
 951                        ahc_inb(ahc, SCB_CONTROL));
 952                 printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
 953                        ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
 954                 ahc_dump_card_state(ahc);
 955                 panic("for safety");
 956                 break;
 957         }
 958         default:
 959                 printf("ahc_intr: seqint, "
 960                        "intstat == 0x%x, scsisigi = 0x%x\n",
 961                        intstat, ahc_inb(ahc, SCSISIGI));
 962                 break;
 963         }
 964 unpause:
 965         /*
 966          *  The sequencer is paused immediately on
 967          *  a SEQINT, so we should restart it when
 968          *  we're done.
 969          */
 970         ahc_unpause(ahc);
 971 }
 972
 973 void
 974 ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat)
 975 {
 976         u_int   scb_index;
 977         u_int   status0;
 978         u_int   status;
 979         struct  scb *scb;
 980         char    cur_channel;
 981         char    intr_channel;
 982
 983         if ((ahc->features & AHC_TWIN) != 0
 984          && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0))
 985                 cur_channel = 'B';
 986         else
 987                 cur_channel = 'A';
 988         intr_channel = cur_channel;
 989
 990         if ((ahc->features & AHC_ULTRA2) != 0)
 991                 status0 = ahc_inb(ahc, SSTAT0) & IOERR;
 992         else
 993                 status0 = 0;
 994         status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
 995         if (status == 0 && status0 == 0) {
 996                 if ((ahc->features & AHC_TWIN) != 0) {
 997                         /* Try the other channel */
 998                         ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
 999                         status = ahc_inb(ahc, SSTAT1)
1000                                & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
1001                         intr_channel = (cur_channel == 'A') ? 'B' : 'A';
1002                 }
1003                 if (status == 0) {
1004                         printf("%s: Spurious SCSI interrupt\n", ahc_name(ahc));
1005                         ahc_outb(ahc, CLRINT, CLRSCSIINT);
1006                         ahc_unpause(ahc);
1007                         return;
1008                 }
1009         }
1010
1011         /* Make sure the sequencer is in a safe location. */
1012         ahc_clear_critical_section(ahc);
1013
1014         scb_index = ahc_inb(ahc, SCB_TAG);
1015         scb = ahc_lookup_scb(ahc, scb_index);
1016         if (scb != NULL
1017          && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0)
1018                 scb = NULL;
1019
1020         if ((ahc->features & AHC_ULTRA2) != 0
1021          && (status0 & IOERR) != 0) {
1022                 int now_lvd;
1023
1024                 now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40;
1025                 printf("%s: Transceiver State Has Changed to %s mode\n",
1026                        ahc_name(ahc), now_lvd ? "LVD" : "SE");
1027                 ahc_outb(ahc, CLRSINT0, CLRIOERR);
1028                 /*
1029                  * When transitioning to SE mode, the reset line
1030                  * glitches, triggering an arbitration bug in some
1031                  * Ultra2 controllers.  This bug is cleared when we
1032                  * assert the reset line.  Since a reset glitch has
1033                  * already occurred with this transition and a
1034                  * transceiver state change is handled just like
1035                  * a bus reset anyway, asserting the reset line
1036                  * ourselves is safe.
1037                  */
1038                 ahc_reset_channel(ahc, intr_channel,
1039                                  /*Initiate Reset*/now_lvd == 0);
1040         } else if ((status & SCSIRSTI) != 0) {
1041                 printf("%s: Someone reset channel %c\n",
1042                         ahc_name(ahc), intr_channel);
1043                 if (intr_channel != cur_channel)
1044                         ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
1045                 ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE);
1046         } else if ((status & SCSIPERR) != 0) {
1047                 /*
1048                  * Determine the bus phase and queue an appropriate message.
1049                  * SCSIPERR is latched true as soon as a parity error
1050                  * occurs.  If the sequencer acked the transfer that
1051                  * caused the parity error and the currently presented
1052                  * transfer on the bus has correct parity, SCSIPERR will
1053                  * be cleared by CLRSCSIPERR.  Use this to determine if
1054                  * we should look at the last phase the sequencer recorded,
1055                  * or the current phase presented on the bus.
1056                  */
1057                 struct  ahc_devinfo devinfo;
1058                 u_int   mesg_out;
1059                 u_int   curphase;
1060                 u_int   errorphase;
1061                 u_int   lastphase;
1062                 u_int   scsirate;
1063                 u_int   i;
1064                 u_int   sstat2;
1065                 int     silent;
1066
1067                 lastphase = ahc_inb(ahc, LASTPHASE);
1068                 curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
1069                 sstat2 = ahc_inb(ahc, SSTAT2);
1070                 ahc_outb(ahc, CLRSINT1, CLRSCSIPERR);
1071                 /*
1072                  * For all phases save DATA, the sequencer won't
1073                  * automatically ack a byte that has a parity error
1074                  * in it.  So the only way that the current phase
1075                  * could be 'data-in' is if the parity error is for
1076                  * an already acked byte in the data phase.  During
1077                  * synchronous data-in transfers, we may actually
1078                  * ack bytes before latching the current phase in
1079                  * LASTPHASE, leading to the discrepancy between
1080                  * curphase and lastphase.
1081                  */
1082                 if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0
1083                  || curphase == P_DATAIN || curphase == P_DATAIN_DT)
1084                         errorphase = curphase;
1085                 else
1086                         errorphase = lastphase;
1087
1088                 for (i = 0; i < num_phases; i++) {
1089                         if (errorphase == ahc_phase_table[i].phase)
1090                                 break;
1091                 }
1092                 mesg_out = ahc_phase_table[i].mesg_out;
1093                 silent = FALSE;
1094                 if (scb != NULL) {
1095                         if (SCB_IS_SILENT(scb))
1096                                 silent = TRUE;
1097                         else
1098                                 ahc_print_path(ahc, scb);
1099                         scb->flags |= SCB_TRANSMISSION_ERROR;
1100                 } else
1101                         printf("%s:%c:%d: ", ahc_name(ahc), intr_channel,
1102                                SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)));
1103                 scsirate = ahc_inb(ahc, SCSIRATE);
1104                 if (silent == FALSE) {
1105                         printf("parity error detected %s. "
1106                                "SEQADDR(0x%x) SCSIRATE(0x%x)\n",
1107                                ahc_phase_table[i].phasemsg,
1108                                ahc_inw(ahc, SEQADDR0),
1109                                scsirate);
1110                         if ((ahc->features & AHC_DT) != 0) {
1111                                 if ((sstat2 & CRCVALERR) != 0)
1112                                         printf("\tCRC Value Mismatch\n");
1113                                 if ((sstat2 & CRCENDERR) != 0)
1114                                         printf("\tNo terminal CRC packet "
1115                                                "recevied\n");
1116                                 if ((sstat2 & CRCREQERR) != 0)
1117                                         printf("\tIllegal CRC packet "
1118                                                "request\n");
1119                                 if ((sstat2 & DUAL_EDGE_ERR) != 0)
1120                                         printf("\tUnexpected %sDT Data Phase\n",
1121                                                (scsirate & SINGLE_EDGE)
1122                                              ? "" : "non-");
1123                         }
1124                 }
1125
1126                 if ((ahc->features & AHC_DT) != 0
1127                  && (sstat2 & DUAL_EDGE_ERR) != 0) {
1128                         /*
1129                          * This error applies regardless of
1130                          * data direction, so ignore the value
1131                          * in the phase table.
1132                          */
1133                         mesg_out = MSG_INITIATOR_DET_ERR;
1134                 }
1135
1136                 /*
1137                  * We've set the hardware to assert ATN if we
1138                  * get a parity error on "in" phases, so all we
1139                  * need to do is stuff the message buffer with
1140                  * the appropriate message.  "In" phases have set
1141                  * mesg_out to something other than MSG_NOP.
1142                  */
1143                 if (mesg_out != MSG_NOOP) {
1144                         if (ahc->msg_type != MSG_TYPE_NONE)
1145                                 ahc->send_msg_perror = TRUE;
1146                         else
1147                                 ahc_outb(ahc, MSG_OUT, mesg_out);
1148                 }
1149                 /*
1150                  * Force a renegotiation with this target just in
1151                  * case we are out of sync for some external reason
1152                  * unknown (or unreported) by the target.
1153                  */
1154                 ahc_fetch_devinfo(ahc, &devinfo);
1155                 ahc_force_renegotiation(ahc, &devinfo);
1156
1157                 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1158                 ahc_unpause(ahc);
1159         } else if ((status & SELTO) != 0) {
1160                 u_int   scbptr;
1161
1162                 /* Stop the selection */
1163                 ahc_outb(ahc, SCSISEQ, 0);
1164
1165                 /* No more pending messages */
1166                 ahc_clear_msg_state(ahc);
1167
1168                 /* Clear interrupt state */
1169                 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1170                 ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR);
1171
1172                 /*
1173                  * Although the driver does not care about the
1174                  * 'Selection in Progress' status bit, the busy
1175                  * LED does.  SELINGO is only cleared by a sucessfull
1176                  * selection, so we must manually clear it to insure
1177                  * the LED turns off just incase no future successful
1178                  * selections occur (e.g. no devices on the bus).
1179                  */
1180                 ahc_outb(ahc, CLRSINT0, CLRSELINGO);
1181
1182                 scbptr = ahc_inb(ahc, WAITING_SCBH);
1183                 ahc_outb(ahc, SCBPTR, scbptr);
1184                 scb_index = ahc_inb(ahc, SCB_TAG);
1185
1186                 scb = ahc_lookup_scb(ahc, scb_index);
1187                 if (scb == NULL) {
1188                         printf("%s: ahc_intr - referenced scb not "
1189                                "valid during SELTO scb(%d, %d)\n",
1190                                ahc_name(ahc), scbptr, scb_index);
1191                         ahc_dump_card_state(ahc);
1192                 } else {
1193                         struct ahc_devinfo devinfo;
1194 #ifdef AHC_DEBUG
1195                         if ((ahc_debug & AHC_SHOW_SELTO) != 0) {
1196                                 ahc_print_path(ahc, scb);
1197                                 printf("Saw Selection Timeout for SCB 0x%x\n",
1198                                        scb_index);
1199                         }
1200 #endif
1201                         ahc_scb_devinfo(ahc, &devinfo, scb);
1202                         aic_set_transaction_status(scb, CAM_SEL_TIMEOUT);
1203                         ahc_freeze_devq(ahc, scb);
1204
1205                         /*
1206                          * Cancel any pending transactions on the device
1207                          * now that it seems to be missing.  This will
1208                          * also revert us to async/narrow transfers until
1209                          * we can renegotiate with the device.
1210                          */
1211                         ahc_handle_devreset(ahc, &devinfo,
1212                                             CAM_SEL_TIMEOUT,
1213                                             "Selection Timeout",
1214                                             /*verbose_level*/1);
1215                 }
1216                 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1217                 ahc_restart(ahc);
1218         } else if ((status & BUSFREE) != 0
1219                 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) {
1220                 struct  ahc_devinfo devinfo;
1221                 u_int   lastphase;
1222                 u_int   saved_scsiid;
1223                 u_int   saved_lun;
1224                 u_int   target;
1225                 u_int   initiator_role_id;
1226                 char    channel;
1227                 int     printerror;
1228
1229                 /*
1230                  * Clear our selection hardware as soon as possible.
1231                  * We may have an entry in the waiting Q for this target,
1232                  * that is affected by this busfree and we don't want to
1233                  * go about selecting the target while we handle the event.
1234                  */
1235                 ahc_outb(ahc, SCSISEQ,
1236                          ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
1237
1238                 /*
1239                  * Disable busfree interrupts and clear the busfree
1240                  * interrupt status.  We do this here so that several
1241                  * bus transactions occur prior to clearing the SCSIINT
1242                  * latch.  It can take a bit for the clearing to take effect.
1243                  */
1244                 ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
1245                 ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR);
1246
1247                 /*
1248                  * Look at what phase we were last in.
1249                  * If its message out, chances are pretty good
1250                  * that the busfree was in response to one of
1251                  * our abort requests.
1252                  */
1253                 lastphase = ahc_inb(ahc, LASTPHASE);
1254                 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
1255                 saved_lun = ahc_inb(ahc, SAVED_LUN);
1256                 target = SCSIID_TARGET(ahc, saved_scsiid);
1257                 initiator_role_id = SCSIID_OUR_ID(saved_scsiid);
1258                 channel = SCSIID_CHANNEL(ahc, saved_scsiid);
1259                 ahc_compile_devinfo(&devinfo, initiator_role_id,
1260                                     target, saved_lun, channel, ROLE_INITIATOR);
1261                 printerror = 1;
1262
1263                 if (lastphase == P_MESGOUT) {
1264                         u_int tag;
1265
1266                         tag = SCB_LIST_NULL;
1267                         if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE)
1268                          || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) {
1269                                 if (ahc->msgout_buf[ahc->msgout_index - 1]
1270                                  == MSG_ABORT_TAG)
1271                                         tag = scb->hscb->tag;
1272                                 ahc_print_path(ahc, scb);
1273                                 printf("SCB %d - Abort%s Completed.\n",
1274                                        scb->hscb->tag, tag == SCB_LIST_NULL ?
1275                                        "" : " Tag");
1276                                 ahc_abort_scbs(ahc, target, channel,
1277                                                saved_lun, tag,
1278                                                ROLE_INITIATOR,
1279                                                CAM_REQ_ABORTED);
1280                                 printerror = 0;
1281                         } else if (ahc_sent_msg(ahc, AHCMSG_1B,
1282                                                 MSG_BUS_DEV_RESET, TRUE)) {
1283 #ifdef __FreeBSD__
1284                                 /*
1285                                  * Don't mark the user's request for this BDR
1286                                  * as completing with CAM_BDR_SENT.  CAM3
1287                                  * specifies CAM_REQ_CMP.
1288                                  */
1289                                 if (scb != NULL
1290                                  && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV
1291                                  && ahc_match_scb(ahc, scb, target, channel,
1292                                                   CAM_LUN_WILDCARD,
1293                                                   SCB_LIST_NULL,
1294                                                   ROLE_INITIATOR)) {
1295                                         aic_set_transaction_status(scb, CAM_REQ_CMP);
1296                                 }
1297 #endif
1298                                 ahc_compile_devinfo(&devinfo,
1299                                                     initiator_role_id,
1300                                                     target,
1301                                                     CAM_LUN_WILDCARD,
1302                                                     channel,
1303                                                     ROLE_INITIATOR);
1304                                 ahc_handle_devreset(ahc, &devinfo,
1305                                                     CAM_BDR_SENT,
1306                                                     "Bus Device Reset",
1307                                                     /*verbose_level*/0);
1308                                 printerror = 0;
1309                         } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1310                                                 MSG_EXT_PPR, FALSE)) {
1311                                 struct ahc_initiator_tinfo *tinfo;
1312                                 struct ahc_tmode_tstate *tstate;
1313
1314                                 /*
1315                                  * PPR Rejected.  Try non-ppr negotiation
1316                                  * and retry command.
1317                                  */
1318                                 tinfo = ahc_fetch_transinfo(ahc,
1319                                                             devinfo.channel,
1320                                                             devinfo.our_scsiid,
1321                                                             devinfo.target,
1322                                                             &tstate);
1323                                 tinfo->curr.transport_version = 2;
1324                                 tinfo->goal.transport_version = 2;
1325                                 tinfo->goal.ppr_options = 0;
1326                                 ahc_qinfifo_requeue_tail(ahc, scb);
1327                                 printerror = 0;
1328                         } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1329                                                 MSG_EXT_WDTR, FALSE)) {
1330                                 /*
1331                                  * Negotiation Rejected.  Go-narrow and
1332                                  * retry command.
1333                                  */
1334                                 ahc_set_width(ahc, &devinfo,
1335                                               MSG_EXT_WDTR_BUS_8_BIT,
1336                                               AHC_TRANS_CUR|AHC_TRANS_GOAL,
1337                                               /*paused*/TRUE);
1338                                 ahc_qinfifo_requeue_tail(ahc, scb);
1339                                 printerror = 0;
1340                         } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
1341                                                 MSG_EXT_SDTR, FALSE)) {
1342                                 /*
1343                                  * Negotiation Rejected.  Go-async and
1344                                  * retry command.
1345                                  */
1346                                 ahc_set_syncrate(ahc, &devinfo,
1347                                                 /*syncrate*/NULL,
1348                                                 /*period*/0, /*offset*/0,
1349                                                 /*ppr_options*/0,
1350                                                 AHC_TRANS_CUR|AHC_TRANS_GOAL,
1351                                                 /*paused*/TRUE);
1352                                 ahc_qinfifo_requeue_tail(ahc, scb);
1353                                 printerror = 0;
1354                         }
1355                 }
1356                 if (printerror != 0) {
1357                         u_int i;
1358
1359                         if (scb != NULL) {
1360                                 u_int tag;
1361
1362                                 if ((scb->hscb->control & TAG_ENB) != 0)
1363                                         tag = scb->hscb->tag;
1364                                 else
1365                                         tag = SCB_LIST_NULL;
1366                                 ahc_print_path(ahc, scb);
1367                                 ahc_abort_scbs(ahc, target, channel,
1368                                                SCB_GET_LUN(scb), tag,
1369                                                ROLE_INITIATOR,
1370                                                CAM_UNEXP_BUSFREE);
1371                         } else {
1372                                 /*
1373                                  * We had not fully identified this connection,
1374                                  * so we cannot abort anything.
1375                                  */
1376                                 printf("%s: ", ahc_name(ahc));
1377                         }
1378                         for (i = 0; i < num_phases; i++) {
1379                                 if (lastphase == ahc_phase_table[i].phase)
1380                                         break;
1381                         }
1382                         if (lastphase != P_BUSFREE) {
1383                                 /*
1384                                  * Renegotiate with this device at the
1385                                  * next oportunity just in case this busfree
1386                                  * is due to a negotiation mismatch with the
1387                                  * device.
1388                                  */
1389                                 ahc_force_renegotiation(ahc, &devinfo);
1390                         }
1391                         printf("Unexpected busfree %s\n"
1392                                "SEQADDR == 0x%x\n",
1393                                ahc_phase_table[i].phasemsg,
1394                                ahc_inb(ahc, SEQADDR0)
1395                                 | (ahc_inb(ahc, SEQADDR1) << 8));
1396                 }
1397                 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1398                 ahc_restart(ahc);
1399         } else {
1400                 printf("%s: Missing case in ahc_handle_scsiint. status = %x\n",
1401                        ahc_name(ahc), status);
1402                 ahc_outb(ahc, CLRINT, CLRSCSIINT);
1403         }
1404 }
1405
1406 /*
1407  * Force renegotiation to occur the next time we initiate
1408  * a command to the current device.
1409  */
1410 static void
1411 ahc_force_renegotiation(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1412 {
1413         struct  ahc_initiator_tinfo *targ_info;
1414         struct  ahc_tmode_tstate *tstate;
1415
1416         targ_info = ahc_fetch_transinfo(ahc,
1417                                         devinfo->channel,
1418                                         devinfo->our_scsiid,
1419                                         devinfo->target,
1420                                         &tstate);
1421         ahc_update_neg_request(ahc, devinfo, tstate,
1422                                targ_info, AHC_NEG_IF_NON_ASYNC);
1423 }
1424
1425 #define AHC_MAX_STEPS 2000
1426 void
1427 ahc_clear_critical_section(struct ahc_softc *ahc)
1428 {
1429         int     stepping;
1430         int     steps;
1431         u_int   simode0;
1432         u_int   simode1;
1433
1434         if (ahc->num_critical_sections == 0)
1435                 return;
1436
1437         stepping = FALSE;
1438         steps = 0;
1439         simode0 = 0;
1440         simode1 = 0;
1441         for (;;) {
1442                 struct  cs *cs;
1443                 u_int   seqaddr;
1444                 u_int   i;
1445
1446                 seqaddr = ahc_inb(ahc, SEQADDR0)
1447                         | (ahc_inb(ahc, SEQADDR1) << 8);
1448
1449                 /*
1450                  * Seqaddr represents the next instruction to execute,
1451                  * so we are really executing the instruction just
1452                  * before it.
1453                  */
1454                 cs = ahc->critical_sections;
1455                 for (i = 0; i < ahc->num_critical_sections; i++, cs++) {
1456
1457                         if (cs->begin < seqaddr && cs->end >= seqaddr)
1458                                 break;
1459                 }
1460
1461                 if (i == ahc->num_critical_sections)
1462                         break;
1463
1464                 if (steps > AHC_MAX_STEPS) {
1465                         printf("%s: Infinite loop in critical section\n",
1466                                ahc_name(ahc));
1467                         ahc_dump_card_state(ahc);
1468                         panic("critical section loop");
1469                 }
1470
1471                 steps++;
1472                 if (stepping == FALSE) {
1473
1474                         /*
1475                          * Disable all interrupt sources so that the
1476                          * sequencer will not be stuck by a pausing
1477                          * interrupt condition while we attempt to
1478                          * leave a critical section.
1479                          */
1480                         simode0 = ahc_inb(ahc, SIMODE0);
1481                         ahc_outb(ahc, SIMODE0, 0);
1482                         simode1 = ahc_inb(ahc, SIMODE1);
1483                         if ((ahc->features & AHC_DT) != 0)
1484                                 /*
1485                                  * On DT class controllers, we
1486                                  * use the enhanced busfree logic.
1487                                  * Unfortunately we cannot re-enable
1488                                  * busfree detection within the
1489                                  * current connection, so we must
1490                                  * leave it on while single stepping.
1491                                  */
1492                                 ahc_outb(ahc, SIMODE1, simode1 & ENBUSFREE);
1493                         else
1494                                 ahc_outb(ahc, SIMODE1, 0);
1495                         ahc_outb(ahc, CLRINT, CLRSCSIINT);
1496                         ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP);
1497                         stepping = TRUE;
1498                 }
1499                 if ((ahc->features & AHC_DT) != 0) {
1500                         ahc_outb(ahc, CLRSINT1, CLRBUSFREE);
1501                         ahc_outb(ahc, CLRINT, CLRSCSIINT);
1502                 }
1503                 ahc_outb(ahc, HCNTRL, ahc->unpause);
1504                 while (!ahc_is_paused(ahc))
1505                         aic_delay(200);
1506         }
1507         if (stepping) {
1508                 ahc_outb(ahc, SIMODE0, simode0);
1509                 ahc_outb(ahc, SIMODE1, simode1);
1510                 ahc_outb(ahc, SEQCTL, ahc->seqctl);
1511         }
1512 }
1513
1514 /*
1515  * Clear any pending interrupt status.
1516  */
1517 void
1518 ahc_clear_intstat(struct ahc_softc *ahc)
1519 {
1520         /* Clear any interrupt conditions this may have caused */
1521         ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
1522                                 |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG|
1523                                 CLRREQINIT);
1524         ahc_flush_device_writes(ahc);
1525         ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);
1526         ahc_flush_device_writes(ahc);
1527         ahc_outb(ahc, CLRINT, CLRSCSIINT);
1528         ahc_flush_device_writes(ahc);
1529 }
1530
1531 /**************************** Debugging Routines ******************************/
1532 #ifdef AHC_DEBUG
1533 uint32_t ahc_debug = AHC_DEBUG_OPTS;
1534 #endif
1535
1536 void
1537 ahc_print_scb(struct scb *scb)
1538 {
1539         int i;
1540
1541         struct hardware_scb *hscb = scb->hscb;
1542
1543         printf("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n",
1544                (void *)scb,
1545                hscb->control,
1546                hscb->scsiid,
1547                hscb->lun,
1548                hscb->cdb_len);
1549         printf("Shared Data: ");
1550         for (i = 0; i < sizeof(hscb->shared_data.cdb); i++)
1551                 printf("%#02x", hscb->shared_data.cdb[i]);
1552         printf("        dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n",
1553                 aic_le32toh(hscb->dataptr),
1554                 aic_le32toh(hscb->datacnt),
1555                 aic_le32toh(hscb->sgptr),
1556                 hscb->tag);
1557         if (scb->sg_count > 0) {
1558                 for (i = 0; i < scb->sg_count; i++) {
1559                         printf("sg[%d] - Addr 0x%x%x : Length %d\n",
1560                                i,
1561                                (aic_le32toh(scb->sg_list[i].len) >> 24
1562                                 & SG_HIGH_ADDR_BITS),
1563                                aic_le32toh(scb->sg_list[i].addr),
1564                                aic_le32toh(scb->sg_list[i].len));
1565                 }
1566         }
1567 }
1568
1569 /************************* Transfer Negotiation *******************************/
1570 /*
1571  * Allocate per target mode instance (ID we respond to as a target)
1572  * transfer negotiation data structures.
1573  */
1574 static struct ahc_tmode_tstate *
1575 ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel)
1576 {
1577         struct ahc_tmode_tstate *master_tstate;
1578         struct ahc_tmode_tstate *tstate;
1579         int i;
1580
1581         master_tstate = ahc->enabled_targets[ahc->our_id];
1582         if (channel == 'B') {
1583                 scsi_id += 8;
1584                 master_tstate = ahc->enabled_targets[ahc->our_id_b + 8];
1585         }
1586         if (ahc->enabled_targets[scsi_id] != NULL
1587          && ahc->enabled_targets[scsi_id] != master_tstate)
1588                 panic("%s: ahc_alloc_tstate - Target already allocated",
1589                       ahc_name(ahc));
1590         tstate = (struct ahc_tmode_tstate*)malloc(sizeof(*tstate),
1591                                                    M_DEVBUF, M_NOWAIT);
1592         if (tstate == NULL)
1593                 return (NULL);
1594
1595         /*
1596          * If we have allocated a master tstate, copy user settings from
1597          * the master tstate (taken from SRAM or the EEPROM) for this
1598          * channel, but reset our current and goal settings to async/narrow
1599          * until an initiator talks to us.
1600          */
1601         if (master_tstate != NULL) {
1602                 memcpy(tstate, master_tstate, sizeof(*tstate));
1603                 memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns));
1604                 tstate->ultraenb = 0;
1605                 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1606                         memset(&tstate->transinfo[i].curr, 0,
1607                               sizeof(tstate->transinfo[i].curr));
1608                         memset(&tstate->transinfo[i].goal, 0,
1609                               sizeof(tstate->transinfo[i].goal));
1610                 }
1611         } else
1612                 memset(tstate, 0, sizeof(*tstate));
1613         ahc->enabled_targets[scsi_id] = tstate;
1614         return (tstate);
1615 }
1616
1617 #ifdef AHC_TARGET_MODE
1618 /*
1619  * Free per target mode instance (ID we respond to as a target)
1620  * transfer negotiation data structures.
1621  */
1622 static void
1623 ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force)
1624 {
1625         struct ahc_tmode_tstate *tstate;
1626
1627         /*
1628          * Don't clean up our "master" tstate.
1629          * It has our default user settings.
1630          */
1631         if (((channel == 'B' && scsi_id == ahc->our_id_b)
1632           || (channel == 'A' && scsi_id == ahc->our_id))
1633          && force == FALSE)
1634                 return;
1635
1636         if (channel == 'B')
1637                 scsi_id += 8;
1638         tstate = ahc->enabled_targets[scsi_id];
1639         if (tstate != NULL)
1640                 free(tstate, M_DEVBUF);
1641         ahc->enabled_targets[scsi_id] = NULL;
1642 }
1643 #endif
1644
1645 /*
1646  * Called when we have an active connection to a target on the bus,
1647  * this function finds the nearest syncrate to the input period limited
1648  * by the capabilities of the bus connectivity of and sync settings for
1649  * the target.
1650  */
1651 struct ahc_syncrate *
1652 ahc_devlimited_syncrate(struct ahc_softc *ahc,
1653                         struct ahc_initiator_tinfo *tinfo,
1654                         u_int *period, u_int *ppr_options, role_t role)
1655 {
1656         struct  ahc_transinfo *transinfo;
1657         u_int   maxsync;
1658
1659         if ((ahc->features & AHC_ULTRA2) != 0) {
1660                 if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0
1661                  && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) {
1662                         maxsync = AHC_SYNCRATE_DT;
1663                 } else {
1664                         maxsync = AHC_SYNCRATE_ULTRA;
1665                         /* Can't do DT on an SE bus */
1666                         *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1667                 }
1668         } else if ((ahc->features & AHC_ULTRA) != 0) {
1669                 maxsync = AHC_SYNCRATE_ULTRA;
1670         } else {
1671                 maxsync = AHC_SYNCRATE_FAST;
1672         }
1673         /*
1674          * Never allow a value higher than our current goal
1675          * period otherwise we may allow a target initiated
1676          * negotiation to go above the limit as set by the
1677          * user.  In the case of an initiator initiated
1678          * sync negotiation, we limit based on the user
1679          * setting.  This allows the system to still accept
1680          * incoming negotiations even if target initiated
1681          * negotiation is not performed.
1682          */
1683         if (role == ROLE_TARGET)
1684                 transinfo = &tinfo->user;
1685         else
1686                 transinfo = &tinfo->goal;
1687         *ppr_options &= transinfo->ppr_options;
1688         if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) {
1689                 maxsync = MAX(maxsync, AHC_SYNCRATE_ULTRA2);
1690                 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1691         }
1692         if (transinfo->period == 0) {
1693                 *period = 0;
1694                 *ppr_options = 0;
1695                 return (NULL);
1696         }
1697         *period = MAX(*period, transinfo->period);
1698         return (ahc_find_syncrate(ahc, period, ppr_options, maxsync));
1699 }
1700
1701 /*
1702  * Look up the valid period to SCSIRATE conversion in our table.
1703  * Return the period and offset that should be sent to the target
1704  * if this was the beginning of an SDTR.
1705  */
1706 struct ahc_syncrate *
1707 ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
1708                   u_int *ppr_options, u_int maxsync)
1709 {
1710         struct ahc_syncrate *syncrate;
1711
1712         if ((ahc->features & AHC_DT) == 0)
1713                 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1714
1715         /* Skip all DT only entries if DT is not available */
1716         if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0
1717          && maxsync < AHC_SYNCRATE_ULTRA2)
1718                 maxsync = AHC_SYNCRATE_ULTRA2;
1719
1720         for (syncrate = &ahc_syncrates[maxsync];
1721              syncrate->rate != NULL;
1722              syncrate++) {
1723
1724                 /*
1725                  * The Ultra2 table doesn't go as low
1726                  * as for the Fast/Ultra cards.
1727                  */
1728                 if ((ahc->features & AHC_ULTRA2) != 0
1729                  && (syncrate->sxfr_u2 == 0))
1730                         break;
1731
1732                 if (*period <= syncrate->period) {
1733                         /*
1734                          * When responding to a target that requests
1735                          * sync, the requested rate may fall between
1736                          * two rates that we can output, but still be
1737                          * a rate that we can receive.  Because of this,
1738                          * we want to respond to the target with
1739                          * the same rate that it sent to us even
1740                          * if the period we use to send data to it
1741                          * is lower.  Only lower the response period
1742                          * if we must.
1743                          */
1744                         if (syncrate == &ahc_syncrates[maxsync])
1745                                 *period = syncrate->period;
1746
1747                         /*
1748                          * At some speeds, we only support
1749                          * ST transfers.
1750                          */
1751                         if ((syncrate->sxfr_u2 & ST_SXFR) != 0)
1752                                 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1753                         break;
1754                 }
1755         }
1756
1757         if ((*period == 0)
1758          || (syncrate->rate == NULL)
1759          || ((ahc->features & AHC_ULTRA2) != 0
1760           && (syncrate->sxfr_u2 == 0))) {
1761                 /* Use asynchronous transfers. */
1762                 *period = 0;
1763                 syncrate = NULL;
1764                 *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
1765         }
1766         return (syncrate);
1767 }
1768
1769 /*
1770  * Convert from an entry in our syncrate table to the SCSI equivalent
1771  * sync "period" factor.
1772  */
1773 u_int
1774 ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync)
1775 {
1776         struct ahc_syncrate *syncrate;
1777
1778         if ((ahc->features & AHC_ULTRA2) != 0)
1779                 scsirate &= SXFR_ULTRA2;
1780         else
1781                 scsirate &= SXFR;
1782
1783         syncrate = &ahc_syncrates[maxsync];
1784         while (syncrate->rate != NULL) {
1785
1786                 if ((ahc->features & AHC_ULTRA2) != 0) {
1787                         if (syncrate->sxfr_u2 == 0)
1788                                 break;
1789                         else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2))
1790                                 return (syncrate->period);
1791                 } else if (scsirate == (syncrate->sxfr & SXFR)) {
1792                                 return (syncrate->period);
1793                 }
1794                 syncrate++;
1795         }
1796         return (0); /* async */
1797 }
1798
1799 /*
1800  * Truncate the given synchronous offset to a value the
1801  * current adapter type and syncrate are capable of.
1802  */
1803 void
1804 ahc_validate_offset(struct ahc_softc *ahc,
1805                     struct ahc_initiator_tinfo *tinfo,
1806                     struct ahc_syncrate *syncrate,
1807                     u_int *offset, int wide, role_t role)
1808 {
1809         u_int maxoffset;
1810
1811         /* Limit offset to what we can do */
1812         if (syncrate == NULL) {
1813                 maxoffset = 0;
1814         } else if ((ahc->features & AHC_ULTRA2) != 0) {
1815                 maxoffset = MAX_OFFSET_ULTRA2;
1816         } else {
1817                 if (wide)
1818                         maxoffset = MAX_OFFSET_16BIT;
1819                 else
1820                         maxoffset = MAX_OFFSET_8BIT;
1821         }
1822         *offset = MIN(*offset, maxoffset);
1823         if (tinfo != NULL) {
1824                 if (role == ROLE_TARGET)
1825                         *offset = MIN(*offset, tinfo->user.offset);
1826                 else
1827                         *offset = MIN(*offset, tinfo->goal.offset);
1828         }
1829 }
1830
1831 /*
1832  * Truncate the given transfer width parameter to a value the
1833  * current adapter type is capable of.
1834  */
1835 void
1836 ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo,
1837                    u_int *bus_width, role_t role)
1838 {
1839         switch (*bus_width) {
1840         default:
1841                 if (ahc->features & AHC_WIDE) {
1842                         /* Respond Wide */
1843                         *bus_width = MSG_EXT_WDTR_BUS_16_BIT;
1844                         break;
1845                 }
1846                 /* FALLTHROUGH */
1847         case MSG_EXT_WDTR_BUS_8_BIT:
1848                 *bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1849                 break;
1850         }
1851         if (tinfo != NULL) {
1852                 if (role == ROLE_TARGET)
1853                         *bus_width = MIN(tinfo->user.width, *bus_width);
1854                 else
1855                         *bus_width = MIN(tinfo->goal.width, *bus_width);
1856         }
1857 }
1858
1859 /*
1860  * Update the bitmask of targets for which the controller should
1861  * negotiate with at the next convenient oportunity.  This currently
1862  * means the next time we send the initial identify messages for
1863  * a new transaction.
1864  */
1865 int
1866 ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1867                        struct ahc_tmode_tstate *tstate,
1868                        struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type)
1869 {
1870         u_int auto_negotiate_orig;
1871
1872         auto_negotiate_orig = tstate->auto_negotiate;
1873         if (neg_type == AHC_NEG_ALWAYS) {
1874                 /*
1875                  * Force our "current" settings to be
1876                  * unknown so that unless a bus reset
1877                  * occurs the need to renegotiate is
1878                  * recorded persistently.
1879                  */
1880                 if ((ahc->features & AHC_WIDE) != 0)
1881                         tinfo->curr.width = AHC_WIDTH_UNKNOWN;
1882                 tinfo->curr.period = AHC_PERIOD_UNKNOWN;
1883                 tinfo->curr.offset = AHC_OFFSET_UNKNOWN;
1884         }
1885         if (tinfo->curr.period != tinfo->goal.period
1886          || tinfo->curr.width != tinfo->goal.width
1887          || tinfo->curr.offset != tinfo->goal.offset
1888          || tinfo->curr.ppr_options != tinfo->goal.ppr_options
1889          || (neg_type == AHC_NEG_IF_NON_ASYNC
1890           && (tinfo->goal.offset != 0
1891            || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT
1892            || tinfo->goal.ppr_options != 0)))
1893                 tstate->auto_negotiate |= devinfo->target_mask;
1894         else
1895                 tstate->auto_negotiate &= ~devinfo->target_mask;
1896
1897         return (auto_negotiate_orig != tstate->auto_negotiate);
1898 }
1899
1900 /*
1901  * Update the user/goal/curr tables of synchronous negotiation
1902  * parameters as well as, in the case of a current or active update,
1903  * any data structures on the host controller.  In the case of an
1904  * active update, the specified target is currently talking to us on
1905  * the bus, so the transfer parameter update must take effect
1906  * immediately.
1907  */
1908 void
1909 ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1910                  struct ahc_syncrate *syncrate, u_int period,
1911                  u_int offset, u_int ppr_options, u_int type, int paused)
1912 {
1913         struct  ahc_initiator_tinfo *tinfo;
1914         struct  ahc_tmode_tstate *tstate;
1915         u_int   old_period;
1916         u_int   old_offset;
1917         u_int   old_ppr;
1918         int     active;
1919         int     update_needed;
1920
1921         active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
1922         update_needed = 0;
1923
1924         if (syncrate == NULL) {
1925                 period = 0;
1926                 offset = 0;
1927         }
1928
1929         tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
1930                                     devinfo->target, &tstate);
1931
1932         if ((type & AHC_TRANS_USER) != 0) {
1933                 tinfo->user.period = period;
1934                 tinfo->user.offset = offset;
1935                 tinfo->user.ppr_options = ppr_options;
1936         }
1937
1938         if ((type & AHC_TRANS_GOAL) != 0) {
1939                 tinfo->goal.period = period;
1940                 tinfo->goal.offset = offset;
1941                 tinfo->goal.ppr_options = ppr_options;
1942         }
1943
1944         old_period = tinfo->curr.period;
1945         old_offset = tinfo->curr.offset;
1946         old_ppr    = tinfo->curr.ppr_options;
1947
1948         if ((type & AHC_TRANS_CUR) != 0
1949          && (old_period != period
1950           || old_offset != offset
1951           || old_ppr != ppr_options)) {
1952                 u_int   scsirate;
1953
1954                 update_needed++;
1955                 scsirate = tinfo->scsirate;
1956                 if ((ahc->features & AHC_ULTRA2) != 0) {
1957
1958                         scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC);
1959                         if (syncrate != NULL) {
1960                                 scsirate |= syncrate->sxfr_u2;
1961                                 if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0)
1962                                         scsirate |= ENABLE_CRC;
1963                                 else
1964                                         scsirate |= SINGLE_EDGE;
1965                         }
1966                 } else {
1967
1968                         scsirate &= ~(SXFR|SOFS);
1969                         /*
1970                          * Ensure Ultra mode is set properly for
1971                          * this target.
1972                          */
1973                         tstate->ultraenb &= ~devinfo->target_mask;
1974                         if (syncrate != NULL) {
1975                                 if (syncrate->sxfr & ULTRA_SXFR) {
1976                                         tstate->ultraenb |=
1977                                                 devinfo->target_mask;
1978                                 }
1979                                 scsirate |= syncrate->sxfr & SXFR;
1980                                 scsirate |= offset & SOFS;
1981                         }
1982                         if (active) {
1983                                 u_int sxfrctl0;
1984
1985                                 sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
1986                                 sxfrctl0 &= ~FAST20;
1987                                 if (tstate->ultraenb & devinfo->target_mask)
1988                                         sxfrctl0 |= FAST20;
1989                                 ahc_outb(ahc, SXFRCTL0, sxfrctl0);
1990                         }
1991                 }
1992                 if (active) {
1993                         ahc_outb(ahc, SCSIRATE, scsirate);
1994                         if ((ahc->features & AHC_ULTRA2) != 0)
1995                                 ahc_outb(ahc, SCSIOFFSET, offset);
1996                 }
1997
1998                 tinfo->scsirate = scsirate;
1999                 tinfo->curr.period = period;
2000                 tinfo->curr.offset = offset;
2001                 tinfo->curr.ppr_options = ppr_options;
2002
2003                 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2004                                CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
2005                 if (bootverbose) {
2006                         if (offset != 0) {
2007                                 printf("%s: target %d synchronous at %sMHz%s, "
2008                                        "offset = 0x%x\n", ahc_name(ahc),
2009                                        devinfo->target, syncrate->rate,
2010                                        (ppr_options & MSG_EXT_PPR_DT_REQ)
2011                                        ? " DT" : "", offset);
2012                         } else {
2013                                 printf("%s: target %d using "
2014                                        "asynchronous transfers\n",
2015                                        ahc_name(ahc), devinfo->target);
2016                         }
2017                 }
2018         }
2019
2020         update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2021                                                 tinfo, AHC_NEG_TO_GOAL);
2022
2023         if (update_needed)
2024                 ahc_update_pending_scbs(ahc);
2025 }
2026
2027 /*
2028  * Update the user/goal/curr tables of wide negotiation
2029  * parameters as well as, in the case of a current or active update,
2030  * any data structures on the host controller.  In the case of an
2031  * active update, the specified target is currently talking to us on
2032  * the bus, so the transfer parameter update must take effect
2033  * immediately.
2034  */
2035 void
2036 ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2037               u_int width, u_int type, int paused)
2038 {
2039         struct  ahc_initiator_tinfo *tinfo;
2040         struct  ahc_tmode_tstate *tstate;
2041         u_int   oldwidth;
2042         int     active;
2043         int     update_needed;
2044
2045         active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
2046         update_needed = 0;
2047         tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2048                                     devinfo->target, &tstate);
2049
2050         if ((type & AHC_TRANS_USER) != 0)
2051                 tinfo->user.width = width;
2052
2053         if ((type & AHC_TRANS_GOAL) != 0)
2054                 tinfo->goal.width = width;
2055
2056         oldwidth = tinfo->curr.width;
2057         if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) {
2058                 u_int   scsirate;
2059
2060                 update_needed++;
2061                 scsirate =  tinfo->scsirate;
2062                 scsirate &= ~WIDEXFER;
2063                 if (width == MSG_EXT_WDTR_BUS_16_BIT)
2064                         scsirate |= WIDEXFER;
2065
2066                 tinfo->scsirate = scsirate;
2067
2068                 if (active)
2069                         ahc_outb(ahc, SCSIRATE, scsirate);
2070
2071                 tinfo->curr.width = width;
2072
2073                 ahc_send_async(ahc, devinfo->channel, devinfo->target,
2074                                CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
2075                 if (bootverbose) {
2076                         printf("%s: target %d using %dbit transfers\n",
2077                                ahc_name(ahc), devinfo->target,
2078                                8 * (0x01 << width));
2079                 }
2080         }
2081
2082         update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
2083                                                 tinfo, AHC_NEG_TO_GOAL);
2084         if (update_needed)
2085                 ahc_update_pending_scbs(ahc);
2086 }
2087
2088 /*
2089  * Update the current state of tagged queuing for a given target.
2090  */
2091 void
2092 ahc_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2093              ahc_queue_alg alg)
2094 {
2095         ahc_platform_set_tags(ahc, devinfo, alg);
2096         ahc_send_async(ahc, devinfo->channel, devinfo->target,
2097                        devinfo->lun, AC_TRANSFER_NEG, &alg);
2098 }
2099
2100 /*
2101  * When the transfer settings for a connection change, update any
2102  * in-transit SCBs to contain the new data so the hardware will
2103  * be set correctly during future (re)selections.
2104  */
2105 static void
2106 ahc_update_pending_scbs(struct ahc_softc *ahc)
2107 {
2108         struct  scb *pending_scb;
2109         int     pending_scb_count;
2110         int     i;
2111         int     paused;
2112         u_int   saved_scbptr;
2113
2114         /*
2115          * Traverse the pending SCB list and ensure that all of the
2116          * SCBs there have the proper settings.
2117          */
2118         pending_scb_count = 0;
2119         LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2120                 struct ahc_devinfo devinfo;
2121                 struct hardware_scb *pending_hscb;
2122                 struct ahc_initiator_tinfo *tinfo;
2123                 struct ahc_tmode_tstate *tstate;
2124
2125                 ahc_scb_devinfo(ahc, &devinfo, pending_scb);
2126                 tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
2127                                             devinfo.our_scsiid,
2128                                             devinfo.target, &tstate);
2129                 pending_hscb = pending_scb->hscb;
2130                 pending_hscb->control &= ~ULTRAENB;
2131                 if ((tstate->ultraenb & devinfo.target_mask) != 0)
2132                         pending_hscb->control |= ULTRAENB;
2133                 pending_hscb->scsirate = tinfo->scsirate;
2134                 pending_hscb->scsioffset = tinfo->curr.offset;
2135                 if ((tstate->auto_negotiate & devinfo.target_mask) == 0
2136                  && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) {
2137                         pending_scb->flags &= ~SCB_AUTO_NEGOTIATE;
2138                         pending_hscb->control &= ~MK_MESSAGE;
2139                 }
2140                 ahc_sync_scb(ahc, pending_scb,
2141                              BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
2142                 pending_scb_count++;
2143         }
2144
2145         if (pending_scb_count == 0)
2146                 return;
2147
2148         if (ahc_is_paused(ahc)) {
2149                 paused = 1;
2150         } else {
2151                 paused = 0;
2152                 ahc_pause(ahc);
2153         }
2154
2155         saved_scbptr = ahc_inb(ahc, SCBPTR);
2156         /* Ensure that the hscbs down on the card match the new information */
2157         for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
2158                 struct  hardware_scb *pending_hscb;
2159                 u_int   control;
2160                 u_int   scb_tag;
2161
2162                 ahc_outb(ahc, SCBPTR, i);
2163                 scb_tag = ahc_inb(ahc, SCB_TAG);
2164                 pending_scb = ahc_lookup_scb(ahc, scb_tag);
2165                 if (pending_scb == NULL)
2166                         continue;
2167
2168                 pending_hscb = pending_scb->hscb;
2169                 control = ahc_inb(ahc, SCB_CONTROL);
2170                 control &= ~(ULTRAENB|MK_MESSAGE);
2171                 control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE);
2172                 ahc_outb(ahc, SCB_CONTROL, control);
2173                 ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate);
2174                 ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset);
2175         }
2176         ahc_outb(ahc, SCBPTR, saved_scbptr);
2177
2178         if (paused == 0)
2179                 ahc_unpause(ahc);
2180 }
2181
2182 /**************************** Pathing Information *****************************/
2183 static void
2184 ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2185 {
2186         u_int   saved_scsiid;
2187         role_t  role;
2188         int     our_id;
2189
2190         if (ahc_inb(ahc, SSTAT0) & TARGET)
2191                 role = ROLE_TARGET;
2192         else
2193                 role = ROLE_INITIATOR;
2194
2195         if (role == ROLE_TARGET
2196          && (ahc->features & AHC_MULTI_TID) != 0
2197          && (ahc_inb(ahc, SEQ_FLAGS)
2198            & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) {
2199                 /* We were selected, so pull our id from TARGIDIN */
2200                 our_id = ahc_inb(ahc, TARGIDIN) & OID;
2201         } else if ((ahc->features & AHC_ULTRA2) != 0)
2202                 our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID;
2203         else
2204                 our_id = ahc_inb(ahc, SCSIID) & OID;
2205
2206         saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2207         ahc_compile_devinfo(devinfo,
2208                             our_id,
2209                             SCSIID_TARGET(ahc, saved_scsiid),
2210                             ahc_inb(ahc, SAVED_LUN),
2211                             SCSIID_CHANNEL(ahc, saved_scsiid),
2212                             role);
2213 }
2214
2215 struct ahc_phase_table_entry*
2216 ahc_lookup_phase_entry(int phase)
2217 {
2218         struct ahc_phase_table_entry *entry;
2219         struct ahc_phase_table_entry *last_entry;
2220
2221         /*
2222          * num_phases doesn't include the default entry which
2223          * will be returned if the phase doesn't match.
2224          */
2225         last_entry = &ahc_phase_table[num_phases];
2226         for (entry = ahc_phase_table; entry < last_entry; entry++) {
2227                 if (phase == entry->phase)
2228                         break;
2229         }
2230         return (entry);
2231 }
2232
2233 void
2234 ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target,
2235                     u_int lun, char channel, role_t role)
2236 {
2237         devinfo->our_scsiid = our_id;
2238         devinfo->target = target;
2239         devinfo->lun = lun;
2240         devinfo->target_offset = target;
2241         devinfo->channel = channel;
2242         devinfo->role = role;
2243         if (channel == 'B')
2244                 devinfo->target_offset += 8;
2245         devinfo->target_mask = (0x01 << devinfo->target_offset);
2246 }
2247
2248 void
2249 ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2250 {
2251         printf("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel,
2252                devinfo->target, devinfo->lun);
2253 }
2254
2255 static void
2256 ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2257                 struct scb *scb)
2258 {
2259         role_t  role;
2260         int     our_id;
2261
2262         our_id = SCSIID_OUR_ID(scb->hscb->scsiid);
2263         role = ROLE_INITIATOR;
2264         if ((scb->flags & SCB_TARGET_SCB) != 0)
2265                 role = ROLE_TARGET;
2266         ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb),
2267                             SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role);
2268 }
2269
2270
2271 /************************ Message Phase Processing ****************************/
2272 static void
2273 ahc_assert_atn(struct ahc_softc *ahc)
2274 {
2275         u_int scsisigo;
2276
2277         scsisigo = ATNO;
2278         if ((ahc->features & AHC_DT) == 0)
2279                 scsisigo |= ahc_inb(ahc, SCSISIGI);
2280         ahc_outb(ahc, SCSISIGO, scsisigo);
2281 }
2282
2283 /*
2284  * When an initiator transaction with the MK_MESSAGE flag either reconnects
2285  * or enters the initial message out phase, we are interrupted.  Fill our
2286  * outgoing message buffer with the appropriate message and beging handing
2287  * the message phase(s) manually.
2288  */
2289 static void
2290 ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2291                            struct scb *scb)
2292 {
2293         /*
2294          * To facilitate adding multiple messages together,
2295          * each routine should increment the index and len
2296          * variables instead of setting them explicitly.
2297          */
2298         ahc->msgout_index = 0;
2299         ahc->msgout_len = 0;
2300
2301         if ((scb->flags & SCB_DEVICE_RESET) == 0
2302          && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) {
2303                 u_int identify_msg;
2304
2305                 identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb);
2306                 if ((scb->hscb->control & DISCENB) != 0)
2307                         identify_msg |= MSG_IDENTIFY_DISCFLAG;
2308                 ahc->msgout_buf[ahc->msgout_index++] = identify_msg;
2309                 ahc->msgout_len++;
2310
2311                 if ((scb->hscb->control & TAG_ENB) != 0) {
2312                         ahc->msgout_buf[ahc->msgout_index++] =
2313                             scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE);
2314                         ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag;
2315                         ahc->msgout_len += 2;
2316                 }
2317         }
2318
2319         if (scb->flags & SCB_DEVICE_RESET) {
2320                 ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET;
2321                 ahc->msgout_len++;
2322                 ahc_print_path(ahc, scb);
2323                 printf("Bus Device Reset Message Sent\n");
2324                 /*
2325                  * Clear our selection hardware in advance of
2326                  * the busfree.  We may have an entry in the waiting
2327                  * Q for this target, and we don't want to go about
2328                  * selecting while we handle the busfree and blow it
2329                  * away.
2330                  */
2331                 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2332         } else if ((scb->flags & SCB_ABORT) != 0) {
2333                 if ((scb->hscb->control & TAG_ENB) != 0)
2334                         ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG;
2335                 else
2336                         ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT;
2337                 ahc->msgout_len++;
2338                 ahc_print_path(ahc, scb);
2339                 printf("Abort%s Message Sent\n",
2340                        (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : "");
2341                 /*
2342                  * Clear our selection hardware in advance of
2343                  * the busfree.  We may have an entry in the waiting
2344                  * Q for this target, and we don't want to go about
2345                  * selecting while we handle the busfree and blow it
2346                  * away.
2347                  */
2348                 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
2349         } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) {
2350                 ahc_build_transfer_msg(ahc, devinfo);
2351         } else {
2352                 printf("ahc_intr: AWAITING_MSG for an SCB that "
2353                        "does not have a waiting message\n");
2354                 printf("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid,
2355                        devinfo->target_mask);
2356                 panic("SCB = %d, SCB Control = %x, MSG_OUT = %x "
2357                       "SCB flags = %x", scb->hscb->tag, scb->hscb->control,
2358                       ahc_inb(ahc, MSG_OUT), scb->flags);
2359         }
2360
2361         /*
2362          * Clear the MK_MESSAGE flag from the SCB so we aren't
2363          * asked to send this message again.
2364          */
2365         ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE);
2366         scb->hscb->control &= ~MK_MESSAGE;
2367         ahc->msgout_index = 0;
2368         ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2369 }
2370
2371 /*
2372  * Build an appropriate transfer negotiation message for the
2373  * currently active target.
2374  */
2375 static void
2376 ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
2377 {
2378         /*
2379          * We need to initiate transfer negotiations.
2380          * If our current and goal settings are identical,
2381          * we want to renegotiate due to a check condition.
2382          */
2383         struct  ahc_initiator_tinfo *tinfo;
2384         struct  ahc_tmode_tstate *tstate;
2385         struct  ahc_syncrate *rate;
2386         int     dowide;
2387         int     dosync;
2388         int     doppr;
2389         u_int   period;
2390         u_int   ppr_options;
2391         u_int   offset;
2392
2393         tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
2394                                     devinfo->target, &tstate);
2395         /*
2396          * Filter our period based on the current connection.
2397          * If we can't perform DT transfers on this segment (not in LVD
2398          * mode for instance), then our decision to issue a PPR message
2399          * may change.
2400          */
2401         period = tinfo->goal.period;
2402         offset = tinfo->goal.offset;
2403         ppr_options = tinfo->goal.ppr_options;
2404         /* Target initiated PPR is not allowed in the SCSI spec */
2405         if (devinfo->role == ROLE_TARGET)
2406                 ppr_options = 0;
2407         rate = ahc_devlimited_syncrate(ahc, tinfo, &period,
2408                                        &ppr_options, devinfo->role);
2409         dowide = tinfo->curr.width != tinfo->goal.width;
2410         dosync = tinfo->curr.offset != offset || tinfo->curr.period != period;
2411         /*
2412          * Only use PPR if we have options that need it, even if the device
2413          * claims to support it.  There might be an expander in the way
2414          * that doesn't.
2415          */
2416         doppr = ppr_options != 0;
2417
2418         if (!dowide && !dosync && !doppr) {
2419                 dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT;
2420                 dosync = tinfo->goal.offset != 0;
2421         }
2422
2423         if (!dowide && !dosync && !doppr) {
2424                 /*
2425                  * Force async with a WDTR message if we have a wide bus,
2426                  * or just issue an SDTR with a 0 offset.
2427                  */
2428                 if ((ahc->features & AHC_WIDE) != 0)
2429                         dowide = 1;
2430                 else
2431                         dosync = 1;
2432
2433                 if (bootverbose) {
2434                         ahc_print_devinfo(ahc, devinfo);
2435                         printf("Ensuring async\n");
2436                 }
2437         }
2438
2439         /* Target initiated PPR is not allowed in the SCSI spec */
2440         if (devinfo->role == ROLE_TARGET)
2441                 doppr = 0;
2442
2443         /*
2444          * Both the PPR message and SDTR message require the
2445          * goal syncrate to be limited to what the target device
2446          * is capable of handling (based on whether an LVD->SE
2447          * expander is on the bus), so combine these two cases.
2448          * Regardless, guarantee that if we are using WDTR and SDTR
2449          * messages that WDTR comes first.
2450          */
2451         if (doppr || (dosync && !dowide)) {
2452
2453                 offset = tinfo->goal.offset;
2454                 ahc_validate_offset(ahc, tinfo, rate, &offset,
2455                                     doppr ? tinfo->goal.width
2456                                           : tinfo->curr.width,
2457                                     devinfo->role);
2458                 if (doppr) {
2459                         ahc_construct_ppr(ahc, devinfo, period, offset,
2460                                           tinfo->goal.width, ppr_options);
2461                 } else {
2462                         ahc_construct_sdtr(ahc, devinfo, period, offset);
2463                 }
2464         } else {
2465                 ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width);
2466         }
2467 }
2468
2469 /*
2470  * Build a synchronous negotiation message in our message
2471  * buffer based on the input parameters.
2472  */
2473 static void
2474 ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2475                    u_int period, u_int offset)
2476 {
2477         if (offset == 0)
2478                 period = AHC_ASYNC_XFER_PERIOD;
2479         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED;
2480         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR_LEN;
2481         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR;
2482         ahc->msgout_buf[ahc->msgout_index++] = period;
2483         ahc->msgout_buf[ahc->msgout_index++] = offset;
2484         ahc->msgout_len += 5;
2485         if (bootverbose) {
2486                 printf("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n",
2487                        ahc_name(ahc), devinfo->channel, devinfo->target,
2488                        devinfo->lun, period, offset);
2489         }
2490 }
2491
2492 /*
2493  * Build a wide negotiation message in our message
2494  * buffer based on the input parameters.
2495  */
2496 static void
2497 ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2498                    u_int bus_width)
2499 {
2500         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED;
2501         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR_LEN;
2502         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR;
2503         ahc->msgout_buf[ahc->msgout_index++] = bus_width;
2504         ahc->msgout_len += 4;
2505         if (bootverbose) {
2506                 printf("(%s:%c:%d:%d): Sending WDTR %x\n",
2507                        ahc_name(ahc), devinfo->channel, devinfo->target,
2508                        devinfo->lun, bus_width);
2509         }
2510 }
2511
2512 /*
2513  * Build a parallel protocol request message in our message
2514  * buffer based on the input parameters.
2515  */
2516 static void
2517 ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
2518                   u_int period, u_int offset, u_int bus_width,
2519                   u_int ppr_options)
2520 {
2521         if (offset == 0)
2522                 period = AHC_ASYNC_XFER_PERIOD;
2523         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED;
2524         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR_LEN;
2525         ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR;
2526         ahc->msgout_buf[ahc->msgout_index++] = period;
2527         ahc->msgout_buf[ahc->msgout_index++] = 0;
2528         ahc->msgout_buf[ahc->msgout_index++] = offset;
2529         ahc->msgout_buf[ahc->msgout_index++] = bus_width;
2530         ahc->msgout_buf[ahc->msgout_index++] = ppr_options;
2531         ahc->msgout_len += 8;
2532         if (bootverbose) {
2533                 printf("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, "
2534                        "offset %x, ppr_options %x\n", ahc_name(ahc),
2535                        devinfo->channel, devinfo->target, devinfo->lun,
2536                        bus_width, period, offset, ppr_options);
2537         }
2538 }
2539
2540 /*
2541  * Clear any active message state.
2542  */
2543 static void
2544 ahc_clear_msg_state(struct ahc_softc *ahc)
2545 {
2546         ahc->msgout_len = 0;
2547         ahc->msgin_index = 0;
2548         ahc->msg_type = MSG_TYPE_NONE;
2549         if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) {
2550                 /*
2551                  * The target didn't care to respond to our
2552                  * message request, so clear ATN.
2553                  */
2554                 ahc_outb(ahc, CLRSINT1, CLRATNO);
2555         }
2556         ahc_outb(ahc, MSG_OUT, MSG_NOOP);
2557         ahc_outb(ahc, SEQ_FLAGS2,
2558                  ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING);
2559 }
2560
2561 static void
2562 ahc_handle_proto_violation(struct ahc_softc *ahc)
2563 {
2564         struct  ahc_devinfo devinfo;
2565         struct  scb *scb;
2566         u_int   scbid;
2567         u_int   seq_flags;
2568         u_int   curphase;
2569         u_int   lastphase;
2570         int     found;
2571
2572         ahc_fetch_devinfo(ahc, &devinfo);
2573         scbid = ahc_inb(ahc, SCB_TAG);
2574         scb = ahc_lookup_scb(ahc, scbid);
2575         seq_flags = ahc_inb(ahc, SEQ_FLAGS);
2576         curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
2577         lastphase = ahc_inb(ahc, LASTPHASE);
2578         if ((seq_flags & NOT_IDENTIFIED) != 0) {
2579
2580                 /*
2581                  * The reconnecting target either did not send an
2582                  * identify message, or did, but we didn't find an SCB
2583                  * to match.
2584                  */
2585                 ahc_print_devinfo(ahc, &devinfo);
2586                 printf("Target did not send an IDENTIFY message. "
2587                        "LASTPHASE = 0x%x.\n", lastphase);
2588                 scb = NULL;
2589         } else if (scb == NULL) {
2590                 /*
2591                  * We don't seem to have an SCB active for this
2592                  * transaction.  Print an error and reset the bus.
2593                  */
2594                 ahc_print_devinfo(ahc, &devinfo);
2595                 printf("No SCB found during protocol violation\n");
2596                 goto proto_violation_reset;
2597         } else {
2598                 aic_set_transaction_status(scb, CAM_SEQUENCE_FAIL);
2599                 if ((seq_flags & NO_CDB_SENT) != 0) {
2600                         ahc_print_path(ahc, scb);
2601                         printf("No or incomplete CDB sent to device.\n");
2602                 } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) {
2603                         /*
2604                          * The target never bothered to provide status to
2605                          * us prior to completing the command.  Since we don't
2606                          * know the disposition of this command, we must attempt
2607                          * to abort it.  Assert ATN and prepare to send an abort
2608                          * message.
2609                          */
2610                         ahc_print_path(ahc, scb);
2611                         printf("Completed command without status.\n");
2612                 } else {
2613                         ahc_print_path(ahc, scb);
2614                         printf("Unknown protocol violation.\n");
2615                         ahc_dump_card_state(ahc);
2616                 }
2617         }
2618         if ((lastphase & ~P_DATAIN_DT) == 0
2619          || lastphase == P_COMMAND) {
2620 proto_violation_reset:
2621                 /*
2622                  * Target either went directly to data/command
2623                  * phase or didn't respond to our ATN.
2624                  * The only safe thing to do is to blow
2625                  * it away with a bus reset.
2626                  */
2627                 found = ahc_reset_channel(ahc, 'A', TRUE);
2628                 printf("%s: Issued Channel %c Bus Reset. "
2629                        "%d SCBs aborted\n", ahc_name(ahc), 'A', found);
2630         } else {
2631                 /*
2632                  * Leave the selection hardware off in case
2633                  * this abort attempt will affect yet to
2634                  * be sent commands.
2635                  */
2636                 ahc_outb(ahc, SCSISEQ,
2637                          ahc_inb(ahc, SCSISEQ) & ~ENSELO);
2638                 ahc_assert_atn(ahc);
2639                 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2640                 if (scb == NULL) {
2641                         ahc_print_devinfo(ahc, &devinfo);
2642                         ahc->msgout_buf[0] = MSG_ABORT_TASK;
2643                         ahc->msgout_len = 1;
2644                         ahc->msgout_index = 0;
2645                         ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2646                 } else {
2647                         ahc_print_path(ahc, scb);
2648                         scb->flags |= SCB_ABORT;
2649                 }
2650                 printf("Protocol violation %s.  Attempting to abort.\n",
2651                        ahc_lookup_phase_entry(curphase)->phasemsg);
2652         }
2653 }
2654
2655 /*
2656  * Manual message loop handler.
2657  */
2658 static void
2659 ahc_handle_message_phase(struct ahc_softc *ahc)
2660 {
2661         struct  ahc_devinfo devinfo;
2662         u_int   bus_phase;
2663         int     end_session;
2664
2665         ahc_fetch_devinfo(ahc, &devinfo);
2666         end_session = FALSE;
2667         bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
2668
2669 reswitch:
2670         switch (ahc->msg_type) {
2671         case MSG_TYPE_INITIATOR_MSGOUT:
2672         {
2673                 int lastbyte;
2674                 int phasemis;
2675                 int msgdone;
2676
2677                 if (ahc->msgout_len == 0)
2678                         panic("HOST_MSG_LOOP interrupt with no active message");
2679
2680 #ifdef AHC_DEBUG
2681                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2682                         ahc_print_devinfo(ahc, &devinfo);
2683                         printf("INITIATOR_MSG_OUT");
2684                 }
2685 #endif
2686                 phasemis = bus_phase != P_MESGOUT;
2687                 if (phasemis) {
2688 #ifdef AHC_DEBUG
2689                         if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2690                                 printf(" PHASEMIS %s\n",
2691                                        ahc_lookup_phase_entry(bus_phase)
2692                                                              ->phasemsg);
2693                         }
2694 #endif
2695                         if (bus_phase == P_MESGIN) {
2696                                 /*
2697                                  * Change gears and see if
2698                                  * this messages is of interest to
2699                                  * us or should be passed back to
2700                                  * the sequencer.
2701                                  */
2702                                 ahc_outb(ahc, CLRSINT1, CLRATNO);
2703                                 ahc->send_msg_perror = FALSE;
2704                                 ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN;
2705                                 ahc->msgin_index = 0;
2706                                 goto reswitch;
2707                         }
2708                         end_session = TRUE;
2709                         break;
2710                 }
2711
2712                 if (ahc->send_msg_perror) {
2713                         ahc_outb(ahc, CLRSINT1, CLRATNO);
2714                         ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2715 #ifdef AHC_DEBUG
2716                         if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2717                                 printf(" byte 0x%x\n", ahc->send_msg_perror);
2718 #endif
2719                         ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR);
2720                         break;
2721                 }
2722
2723                 msgdone = ahc->msgout_index == ahc->msgout_len;
2724                 if (msgdone) {
2725                         /*
2726                          * The target has requested a retry.
2727                          * Re-assert ATN, reset our message index to
2728                          * 0, and try again.
2729                          */
2730                         ahc->msgout_index = 0;
2731                         ahc_assert_atn(ahc);
2732                 }
2733
2734                 lastbyte = ahc->msgout_index == (ahc->msgout_len - 1);
2735                 if (lastbyte) {
2736                         /* Last byte is signified by dropping ATN */
2737                         ahc_outb(ahc, CLRSINT1, CLRATNO);
2738                 }
2739
2740                 /*
2741                  * Clear our interrupt status and present
2742                  * the next byte on the bus.
2743                  */
2744                 ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2745 #ifdef AHC_DEBUG
2746                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2747                         printf(" byte 0x%x\n",
2748                                ahc->msgout_buf[ahc->msgout_index]);
2749 #endif
2750                 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
2751                 break;
2752         }
2753         case MSG_TYPE_INITIATOR_MSGIN:
2754         {
2755                 int phasemis;
2756                 int message_done;
2757
2758 #ifdef AHC_DEBUG
2759                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2760                         ahc_print_devinfo(ahc, &devinfo);
2761                         printf("INITIATOR_MSG_IN");
2762                 }
2763 #endif
2764                 phasemis = bus_phase != P_MESGIN;
2765                 if (phasemis) {
2766 #ifdef AHC_DEBUG
2767                         if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2768                                 printf(" PHASEMIS %s\n",
2769                                        ahc_lookup_phase_entry(bus_phase)
2770                                                              ->phasemsg);
2771                         }
2772 #endif
2773                         ahc->msgin_index = 0;
2774                         if (bus_phase == P_MESGOUT
2775                          && (ahc->send_msg_perror == TRUE
2776                           || (ahc->msgout_len != 0
2777                            && ahc->msgout_index == 0))) {
2778                                 ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
2779                                 goto reswitch;
2780                         }
2781                         end_session = TRUE;
2782                         break;
2783                 }
2784
2785                 /* Pull the byte in without acking it */
2786                 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL);
2787 #ifdef AHC_DEBUG
2788                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2789                         printf(" byte 0x%x\n",
2790                                ahc->msgin_buf[ahc->msgin_index]);
2791 #endif
2792
2793                 message_done = ahc_parse_msg(ahc, &devinfo);
2794
2795                 if (message_done) {
2796                         /*
2797                          * Clear our incoming message buffer in case there
2798                          * is another message following this one.
2799                          */
2800                         ahc->msgin_index = 0;
2801
2802                         /*
2803                          * If this message illicited a response,
2804                          * assert ATN so the target takes us to the
2805                          * message out phase.
2806                          */
2807                         if (ahc->msgout_len != 0) {
2808 #ifdef AHC_DEBUG
2809                                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2810                                         ahc_print_devinfo(ahc, &devinfo);
2811                                         printf("Asserting ATN for response\n");
2812                                 }
2813 #endif
2814                                 ahc_assert_atn(ahc);
2815                         }
2816                 } else
2817                         ahc->msgin_index++;
2818
2819                 if (message_done == MSGLOOP_TERMINATED) {
2820                         end_session = TRUE;
2821                 } else {
2822                         /* Ack the byte */
2823                         ahc_outb(ahc, CLRSINT1, CLRREQINIT);
2824                         ahc_inb(ahc, SCSIDATL);
2825                 }
2826                 break;
2827         }
2828         case MSG_TYPE_TARGET_MSGIN:
2829         {
2830                 int msgdone;
2831
2832                 if (ahc->msgout_len == 0)
2833                         panic("Target MSGIN with no active message");
2834
2835 #ifdef AHC_DEBUG
2836                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2837                         ahc_print_devinfo(ahc, &devinfo);
2838                         printf("TARGET_MSG_IN");
2839                 }
2840 #endif
2841
2842                 /*
2843                  * If we interrupted a mesgout session, the initiator
2844                  * will not know this until our first REQ.  So, we
2845                  * only honor mesgout requests after we've sent our
2846                  * first byte.
2847                  */
2848                 if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0
2849                  && ahc->msgout_index > 0) {
2850
2851                         /*
2852                          * Change gears and see if this messages is
2853                          * of interest to us or should be passed back
2854                          * to the sequencer.
2855                          */
2856 #ifdef AHC_DEBUG
2857                         if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2858                                 printf(" Honoring ATN Request.\n");
2859 #endif
2860                         ahc->msg_type = MSG_TYPE_TARGET_MSGOUT;
2861
2862                         /*
2863                          * Disable SCSI Programmed I/O during the
2864                          * phase change so as to avoid phantom REQs.
2865                          */
2866                         ahc_outb(ahc, SXFRCTL0,
2867                                  ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
2868
2869                         /*
2870                          * Since SPIORDY asserts when ACK is asserted
2871                          * for P_MSGOUT, and SPIORDY's assertion triggered
2872                          * our entry into this routine, wait for ACK to
2873                          * *de-assert* before changing phases.
2874                          */
2875                         while ((ahc_inb(ahc, SCSISIGI) & ACKI) != 0)
2876                                 ;
2877
2878                         ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO);
2879
2880                         /*
2881                          * All phase line changes require a bus
2882                          * settle delay before REQ is asserted.
2883                          * [SCSI SPI4 10.7.1]
2884                          */
2885                         ahc_flush_device_writes(ahc);
2886                         aic_delay(AHC_BUSSETTLE_DELAY);
2887
2888                         ahc->msgin_index = 0;
2889                         /* Enable SCSI Programmed I/O to REQ for first byte */
2890                         ahc_outb(ahc, SXFRCTL0,
2891                                  ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2892                         break;
2893                 }
2894
2895                 msgdone = ahc->msgout_index == ahc->msgout_len;
2896                 if (msgdone) {
2897                         ahc_outb(ahc, SXFRCTL0,
2898                                  ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
2899                         end_session = TRUE;
2900                         break;
2901                 }
2902
2903                 /*
2904                  * Present the next byte on the bus.
2905                  */
2906 #ifdef AHC_DEBUG
2907                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2908                         printf(" byte 0x%x\n",
2909                                ahc->msgout_buf[ahc->msgout_index]);
2910 #endif
2911                 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN);
2912                 ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
2913                 break;
2914         }
2915         case MSG_TYPE_TARGET_MSGOUT:
2916         {
2917                 int lastbyte;
2918                 int msgdone;
2919
2920 #ifdef AHC_DEBUG
2921                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2922                         ahc_print_devinfo(ahc, &devinfo);
2923                         printf("TARGET_MSG_OUT");
2924                 }
2925 #endif
2926                 /*
2927                  * The initiator signals that this is
2928                  * the last byte by dropping ATN.
2929                  */
2930                 lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0;
2931
2932                 /*
2933                  * Read the latched byte, but turn off SPIOEN first
2934                  * so that we don't inadvertently cause a REQ for the
2935                  * next byte.
2936                  */
2937                 ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
2938                 ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL);
2939
2940 #ifdef AHC_DEBUG
2941                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
2942                         printf(" byte 0x%x\n",
2943                                ahc->msgin_buf[ahc->msgin_index]);
2944 #endif
2945
2946                 msgdone = ahc_parse_msg(ahc, &devinfo);
2947                 if (msgdone == MSGLOOP_TERMINATED) {
2948                         /*
2949                          * The message is *really* done in that it caused
2950                          * us to go to bus free.  The sequencer has already
2951                          * been reset at this point, so pull the ejection
2952                          * handle.
2953                          */
2954                         return;
2955                 }
2956
2957                 ahc->msgin_index++;
2958
2959                 /*
2960                  * XXX Read spec about initiator dropping ATN too soon
2961                  *     and use msgdone to detect it.
2962                  */
2963                 if (msgdone == MSGLOOP_MSGCOMPLETE) {
2964                         ahc->msgin_index = 0;
2965
2966                         /*
2967                          * If this message illicited a response, transition
2968                          * to the Message in phase and send it.
2969                          */
2970                         if (ahc->msgout_len != 0) {
2971 #ifdef AHC_DEBUG
2972                                 if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) {
2973                                         ahc_print_devinfo(ahc, &devinfo);
2974                                         printf(" preparing response.\n");
2975                                 }
2976 #endif
2977                                 ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO);
2978
2979                                 /*
2980                                  * All phase line changes require a bus
2981                                  * settle delay before REQ is asserted.
2982                                  * [SCSI SPI4 10.7.1]  When transitioning
2983                                  * from an OUT to an IN phase, we must
2984                                  * also wait a data release delay to allow
2985                                  * the initiator time to release the data
2986                                  * lines. [SCSI SPI4 10.12]
2987                                  */
2988                                 ahc_flush_device_writes(ahc);
2989                                 aic_delay(AHC_BUSSETTLE_DELAY
2990                                         + AHC_DATARELEASE_DELAY);
2991
2992                                 /*
2993                                  * Enable SCSI Programmed I/O.  This will
2994                                  * immediately cause SPIORDY to assert,
2995                                  * and the sequencer will call our message
2996                                  * loop again.
2997                                  */
2998                                 ahc_outb(ahc, SXFRCTL0,
2999                                          ahc_inb(ahc, SXFRCTL0) | SPIOEN);
3000                                 ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
3001                                 ahc->msgin_index = 0;
3002                                 break;
3003                         }
3004                 }
3005
3006                 if (lastbyte)
3007                         end_session = TRUE;
3008                 else {
3009                         /* Ask for the next byte. */
3010                         ahc_outb(ahc, SXFRCTL0,
3011                                  ahc_inb(ahc, SXFRCTL0) | SPIOEN);
3012                 }
3013
3014                 break;
3015         }
3016         default:
3017                 panic("Unknown REQINIT message type");
3018         }
3019
3020         if (end_session) {
3021                 ahc_clear_msg_state(ahc);
3022                 ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP);
3023         } else
3024                 ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP);
3025 }
3026
3027 /*
3028  * See if we sent a particular extended message to the target.
3029  * If "full" is true, return true only if the target saw the full
3030  * message.  If "full" is false, return true if the target saw at
3031  * least the first byte of the message.
3032  */
3033 static int
3034 ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full)
3035 {
3036         int found;
3037         u_int index;
3038
3039         found = FALSE;
3040         index = 0;
3041
3042         while (index < ahc->msgout_len) {
3043                 if (ahc->msgout_buf[index] == MSG_EXTENDED) {
3044                         u_int end_index;
3045
3046                         end_index = index + 1 + ahc->msgout_buf[index + 1];
3047                         if (ahc->msgout_buf[index+2] == msgval
3048                          && type == AHCMSG_EXT) {
3049
3050                                 if (full) {
3051                                         if (ahc->msgout_index > end_index)
3052                                                 found = TRUE;
3053                                 } else if (ahc->msgout_index > index)
3054                                         found = TRUE;
3055                         }
3056                         index = end_index;
3057                 } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK
3058                         && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) {
3059
3060                         /* Skip tag type and tag id or residue param*/
3061                         index += 2;
3062                 } else {
3063                         /* Single byte message */
3064                         if (type == AHCMSG_1B
3065                          && ahc->msgout_buf[index] == msgval
3066                          && ahc->msgout_index > index)
3067                                 found = TRUE;
3068                         index++;
3069                 }
3070
3071                 if (found)
3072                         break;
3073         }
3074         return (found);
3075 }
3076
3077 /*
3078  * Wait for a complete incoming message, parse it, and respond accordingly.
3079  */
3080 static int
3081 ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3082 {
3083         struct  ahc_initiator_tinfo *tinfo;
3084         struct  ahc_tmode_tstate *tstate;
3085         int     reject;
3086         int     done;
3087         int     response;
3088         u_int   targ_scsirate;
3089
3090         done = MSGLOOP_IN_PROG;
3091         response = FALSE;
3092         reject = FALSE;
3093         tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
3094                                     devinfo->target, &tstate);
3095         targ_scsirate = tinfo->scsirate;
3096
3097         /*
3098          * Parse as much of the message as is available,
3099          * rejecting it if we don't support it.  When
3100          * the entire message is available and has been
3101          * handled, return MSGLOOP_MSGCOMPLETE, indicating
3102          * that we have parsed an entire message.
3103          *
3104          * In the case of extended messages, we accept the length
3105          * byte outright and perform more checking once we know the
3106          * extended message type.
3107          */
3108         switch (ahc->msgin_buf[0]) {
3109         case MSG_DISCONNECT:
3110         case MSG_SAVEDATAPOINTER:
3111         case MSG_CMDCOMPLETE:
3112         case MSG_RESTOREPOINTERS:
3113         case MSG_IGN_WIDE_RESIDUE:
3114                 /*
3115                  * End our message loop as these are messages
3116                  * the sequencer handles on its own.
3117                  */
3118                 done = MSGLOOP_TERMINATED;
3119                 break;
3120         case MSG_MESSAGE_REJECT:
3121                 response = ahc_handle_msg_reject(ahc, devinfo);
3122                 /* FALLTHROUGH */
3123         case MSG_NOOP:
3124                 done = MSGLOOP_MSGCOMPLETE;
3125                 break;
3126         case MSG_EXTENDED:
3127         {
3128                 /* Wait for enough of the message to begin validation */
3129                 if (ahc->msgin_index < 2)
3130                         break;
3131                 switch (ahc->msgin_buf[2]) {
3132                 case MSG_EXT_SDTR:
3133                 {
3134                         struct   ahc_syncrate *syncrate;
3135                         u_int    period;
3136                         u_int    ppr_options;
3137                         u_int    offset;
3138                         u_int    saved_offset;
3139
3140                         if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) {
3141                                 reject = TRUE;
3142                                 break;
3143                         }
3144
3145                         /*
3146                          * Wait until we have both args before validating
3147                          * and acting on this message.
3148                          *
3149                          * Add one to MSG_EXT_SDTR_LEN to account for
3150                          * the extended message preamble.
3151                          */
3152                         if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1))
3153                                 break;
3154
3155                         period = ahc->msgin_buf[3];
3156                         ppr_options = 0;
3157                         saved_offset = offset = ahc->msgin_buf[4];
3158                         syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3159                                                            &ppr_options,
3160                                                            devinfo->role);
3161                         ahc_validate_offset(ahc, tinfo, syncrate, &offset,
3162                                             targ_scsirate & WIDEXFER,
3163                                             devinfo->role);
3164                         if (bootverbose) {
3165                                 printf("(%s:%c:%d:%d): Received "
3166                                        "SDTR period %x, offset %x\n\t"
3167                                        "Filtered to period %x, offset %x\n",
3168                                        ahc_name(ahc), devinfo->channel,
3169                                        devinfo->target, devinfo->lun,
3170                                        ahc->msgin_buf[3], saved_offset,
3171                                        period, offset);
3172                         }
3173                         ahc_set_syncrate(ahc, devinfo,
3174                                          syncrate, period,
3175                                          offset, ppr_options,
3176                                          AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3177                                          /*paused*/TRUE);
3178
3179                         /*
3180                          * See if we initiated Sync Negotiation
3181                          * and didn't have to fall down to async
3182                          * transfers.
3183                          */
3184                         if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) {
3185                                 /* We started it */
3186                                 if (saved_offset != offset) {
3187                                         /* Went too low - force async */
3188                                         reject = TRUE;
3189                                 }
3190                         } else {
3191                                 /*
3192                                  * Send our own SDTR in reply
3193                                  */
3194                                 if (bootverbose
3195                                  && devinfo->role == ROLE_INITIATOR) {
3196                                         printf("(%s:%c:%d:%d): Target "
3197                                                "Initiated SDTR\n",
3198                                                ahc_name(ahc), devinfo->channel,
3199                                                devinfo->target, devinfo->lun);
3200                                 }
3201                                 ahc->msgout_index = 0;
3202                                 ahc->msgout_len = 0;
3203                                 ahc_construct_sdtr(ahc, devinfo,
3204                                                    period, offset);
3205                                 ahc->msgout_index = 0;
3206                                 response = TRUE;
3207                         }
3208                         done = MSGLOOP_MSGCOMPLETE;
3209                         break;
3210                 }
3211                 case MSG_EXT_WDTR:
3212                 {
3213                         u_int bus_width;
3214                         u_int saved_width;
3215                         u_int sending_reply;
3216
3217                         sending_reply = FALSE;
3218                         if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) {
3219                                 reject = TRUE;
3220                                 break;
3221                         }
3222
3223                         /*
3224                          * Wait until we have our arg before validating
3225                          * and acting on this message.
3226                          *
3227                          * Add one to MSG_EXT_WDTR_LEN to account for
3228                          * the extended message preamble.
3229                          */
3230                         if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1))
3231                                 break;
3232
3233                         bus_width = ahc->msgin_buf[3];
3234                         saved_width = bus_width;
3235                         ahc_validate_width(ahc, tinfo, &bus_width,
3236                                            devinfo->role);
3237                         if (bootverbose) {
3238                                 printf("(%s:%c:%d:%d): Received WDTR "
3239                                        "%x filtered to %x\n",
3240                                        ahc_name(ahc), devinfo->channel,
3241                                        devinfo->target, devinfo->lun,
3242                                        saved_width, bus_width);
3243                         }
3244
3245                         if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) {
3246                                 /*
3247                                  * Don't send a WDTR back to the
3248                                  * target, since we asked first.
3249                                  * If the width went higher than our
3250                                  * request, reject it.
3251                                  */
3252                                 if (saved_width > bus_width) {
3253                                         reject = TRUE;
3254                                         printf("(%s:%c:%d:%d): requested %dBit "
3255                                                "transfers.  Rejecting...\n",
3256                                                ahc_name(ahc), devinfo->channel,
3257                                                devinfo->target, devinfo->lun,
3258                                                8 * (0x01 << bus_width));
3259                                         bus_width = 0;
3260                                 }
3261                         } else {
3262                                 /*
3263                                  * Send our own WDTR in reply
3264                                  */
3265                                 if (bootverbose
3266                                  && devinfo->role == ROLE_INITIATOR) {
3267                                         printf("(%s:%c:%d:%d): Target "
3268                                                "Initiated WDTR\n",
3269                                                ahc_name(ahc), devinfo->channel,
3270                                                devinfo->target, devinfo->lun);
3271                                 }
3272                                 ahc->msgout_index = 0;
3273                                 ahc->msgout_len = 0;
3274                                 ahc_construct_wdtr(ahc, devinfo, bus_width);
3275                                 ahc->msgout_index = 0;
3276                                 response = TRUE;
3277                                 sending_reply = TRUE;
3278                         }
3279                         /*
3280                          * After a wide message, we are async, but
3281                          * some devices don't seem to honor this portion
3282                          * of the spec.  Force a renegotiation of the
3283                          * sync component of our transfer agreement even
3284                          * if our goal is async.  By updating our width
3285                          * after forcing the negotiation, we avoid
3286                          * renegotiating for width.
3287                          */
3288                         ahc_update_neg_request(ahc, devinfo, tstate,
3289                                                tinfo, AHC_NEG_ALWAYS);
3290                         ahc_set_width(ahc, devinfo, bus_width,
3291                                       AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3292                                       /*paused*/TRUE);
3293                         if (sending_reply == FALSE && reject == FALSE) {
3294
3295                                 /*
3296                                  * We will always have an SDTR to send.
3297                                  */
3298                                 ahc->msgout_index = 0;
3299                                 ahc->msgout_len = 0;
3300                                 ahc_build_transfer_msg(ahc, devinfo);
3301                                 ahc->msgout_index = 0;
3302                                 response = TRUE;
3303                         }
3304                         done = MSGLOOP_MSGCOMPLETE;
3305                         break;
3306                 }
3307                 case MSG_EXT_PPR:
3308                 {
3309                         struct  ahc_syncrate *syncrate;
3310                         u_int   period;
3311                         u_int   offset;
3312                         u_int   bus_width;
3313                         u_int   ppr_options;
3314                         u_int   saved_width;
3315                         u_int   saved_offset;
3316                         u_int   saved_ppr_options;
3317
3318                         if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) {
3319                                 reject = TRUE;
3320                                 break;
3321                         }
3322
3323                         /*
3324                          * Wait until we have all args before validating
3325                          * and acting on this message.
3326                          *
3327                          * Add one to MSG_EXT_PPR_LEN to account for
3328                          * the extended message preamble.
3329                          */
3330                         if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1))
3331                                 break;
3332
3333                         period = ahc->msgin_buf[3];
3334                         offset = ahc->msgin_buf[5];
3335                         bus_width = ahc->msgin_buf[6];
3336                         saved_width = bus_width;
3337                         ppr_options = ahc->msgin_buf[7];
3338                         /*
3339                          * According to the spec, a DT only
3340                          * period factor with no DT option
3341                          * set implies async.
3342                          */
3343                         if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0
3344                          && period == 9)
3345                                 offset = 0;
3346                         saved_ppr_options = ppr_options;
3347                         saved_offset = offset;
3348
3349                         /*
3350                          * Mask out any options we don't support
3351                          * on any controller.  Transfer options are
3352                          * only available if we are negotiating wide.
3353                          */
3354                         ppr_options &= MSG_EXT_PPR_DT_REQ;
3355                         if (bus_width == 0)
3356                                 ppr_options = 0;
3357
3358                         ahc_validate_width(ahc, tinfo, &bus_width,
3359                                            devinfo->role);
3360                         syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
3361                                                            &ppr_options,
3362                                                            devinfo->role);
3363                         ahc_validate_offset(ahc, tinfo, syncrate,
3364                                             &offset, bus_width,
3365                                             devinfo->role);
3366
3367                         if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) {
3368                                 /*
3369                                  * If we are unable to do any of the
3370                                  * requested options (we went too low),
3371                                  * then we'll have to reject the message.
3372                                  */
3373                                 if (saved_width > bus_width
3374                                  || saved_offset != offset
3375                                  || saved_ppr_options != ppr_options) {
3376                                         reject = TRUE;
3377                                         period = 0;
3378                                         offset = 0;
3379                                         bus_width = 0;
3380                                         ppr_options = 0;
3381                                         syncrate = NULL;
3382                                 }
3383                         } else {
3384                                 if (devinfo->role != ROLE_TARGET)
3385                                         printf("(%s:%c:%d:%d): Target "
3386                                                "Initiated PPR\n",
3387                                                ahc_name(ahc), devinfo->channel,
3388                                                devinfo->target, devinfo->lun);
3389                                 else
3390                                         printf("(%s:%c:%d:%d): Initiator "
3391                                                "Initiated PPR\n",
3392                                                ahc_name(ahc), devinfo->channel,
3393                                                devinfo->target, devinfo->lun);
3394                                 ahc->msgout_index = 0;
3395                                 ahc->msgout_len = 0;
3396                                 ahc_construct_ppr(ahc, devinfo, period, offset,
3397                                                   bus_width, ppr_options);
3398                                 ahc->msgout_index = 0;
3399                                 response = TRUE;
3400                         }
3401                         if (bootverbose) {
3402                                 printf("(%s:%c:%d:%d): Received PPR width %x, "
3403                                        "period %x, offset %x,options %x\n"
3404                                        "\tFiltered to width %x, period %x, "
3405                                        "offset %x, options %x\n",
3406                                        ahc_name(ahc), devinfo->channel,
3407                                        devinfo->target, devinfo->lun,
3408                                        saved_width, ahc->msgin_buf[3],
3409                                        saved_offset, saved_ppr_options,
3410                                        bus_width, period, offset, ppr_options);
3411                         }
3412                         ahc_set_width(ahc, devinfo, bus_width,
3413                                       AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3414                                       /*paused*/TRUE);
3415                         ahc_set_syncrate(ahc, devinfo,
3416                                          syncrate, period,
3417                                          offset, ppr_options,
3418                                          AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3419                                          /*paused*/TRUE);
3420                         done = MSGLOOP_MSGCOMPLETE;
3421                         break;
3422                 }
3423                 default:
3424                         /* Unknown extended message.  Reject it. */
3425                         reject = TRUE;
3426                         break;
3427                 }
3428                 break;
3429         }
3430 #ifdef AHC_TARGET_MODE
3431         case MSG_BUS_DEV_RESET:
3432                 ahc_handle_devreset(ahc, devinfo,
3433                                     CAM_BDR_SENT,
3434                                     "Bus Device Reset Received",
3435                                     /*verbose_level*/0);
3436                 ahc_restart(ahc);
3437                 done = MSGLOOP_TERMINATED;
3438                 break;
3439         case MSG_ABORT_TAG:
3440         case MSG_ABORT:
3441         case MSG_CLEAR_QUEUE:
3442         {
3443                 int tag;
3444
3445                 /* Target mode messages */
3446                 if (devinfo->role != ROLE_TARGET) {
3447                         reject = TRUE;
3448                         break;
3449                 }
3450                 tag = SCB_LIST_NULL;
3451                 if (ahc->msgin_buf[0] == MSG_ABORT_TAG)
3452                         tag = ahc_inb(ahc, INITIATOR_TAG);
3453                 ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
3454                                devinfo->lun, tag, ROLE_TARGET,
3455                                CAM_REQ_ABORTED);
3456
3457                 tstate = ahc->enabled_targets[devinfo->our_scsiid];
3458                 if (tstate != NULL) {
3459                         struct ahc_tmode_lstate* lstate;
3460
3461                         lstate = tstate->enabled_luns[devinfo->lun];
3462                         if (lstate != NULL) {
3463                                 ahc_queue_lstate_event(ahc, lstate,
3464                                                        devinfo->our_scsiid,
3465                                                        ahc->msgin_buf[0],
3466                                                        /*arg*/tag);
3467                                 ahc_send_lstate_events(ahc, lstate);
3468                         }
3469                 }
3470                 ahc_restart(ahc);
3471                 done = MSGLOOP_TERMINATED;
3472                 break;
3473         }
3474 #endif
3475         case MSG_TERM_IO_PROC:
3476         default:
3477                 reject = TRUE;
3478                 break;
3479         }
3480
3481         if (reject) {
3482                 /*
3483                  * Setup to reject the message.
3484                  */
3485                 ahc->msgout_index = 0;
3486                 ahc->msgout_len = 1;
3487                 ahc->msgout_buf[0] = MSG_MESSAGE_REJECT;
3488                 done = MSGLOOP_MSGCOMPLETE;
3489                 response = TRUE;
3490         }
3491
3492         if (done != MSGLOOP_IN_PROG && !response)
3493                 /* Clear the outgoing message buffer */
3494                 ahc->msgout_len = 0;
3495
3496         return (done);
3497 }
3498
3499 /*
3500  * Process a message reject message.
3501  */
3502 static int
3503 ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3504 {
3505         /*
3506          * What we care about here is if we had an
3507          * outstanding SDTR or WDTR message for this
3508          * target.  If we did, this is a signal that
3509          * the target is refusing negotiation.
3510          */
3511         struct scb *scb;
3512         struct ahc_initiator_tinfo *tinfo;
3513         struct ahc_tmode_tstate *tstate;
3514         u_int scb_index;
3515         u_int last_msg;
3516         int   response = 0;
3517
3518         scb_index = ahc_inb(ahc, SCB_TAG);
3519         scb = ahc_lookup_scb(ahc, scb_index);
3520         tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
3521                                     devinfo->our_scsiid,
3522                                     devinfo->target, &tstate);
3523         /* Might be necessary */
3524         last_msg = ahc_inb(ahc, LAST_MSG);
3525
3526         if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) {
3527                 /*
3528                  * Target does not support the PPR message.
3529                  * Attempt to negotiate SPI-2 style.
3530                  */
3531                 if (bootverbose) {
3532                         printf("(%s:%c:%d:%d): PPR Rejected. "
3533                                "Trying WDTR/SDTR\n",
3534                                ahc_name(ahc), devinfo->channel,
3535                                devinfo->target, devinfo->lun);
3536                 }
3537                 tinfo->goal.ppr_options = 0;
3538                 tinfo->curr.transport_version = 2;
3539                 tinfo->goal.transport_version = 2;
3540                 ahc->msgout_index = 0;
3541                 ahc->msgout_len = 0;
3542                 ahc_build_transfer_msg(ahc, devinfo);
3543                 ahc->msgout_index = 0;
3544                 response = 1;
3545         } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) {
3546
3547                 /* note 8bit xfers */
3548                 printf("(%s:%c:%d:%d): refuses WIDE negotiation.  Using "
3549                        "8bit transfers\n", ahc_name(ahc),
3550                        devinfo->channel, devinfo->target, devinfo->lun);
3551                 ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
3552                               AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3553                               /*paused*/TRUE);
3554                 /*
3555                  * No need to clear the sync rate.  If the target
3556                  * did not accept the command, our syncrate is
3557                  * unaffected.  If the target started the negotiation,
3558                  * but rejected our response, we already cleared the
3559                  * sync rate before sending our WDTR.
3560                  */
3561                 if (tinfo->goal.offset != tinfo->curr.offset) {
3562
3563                         /* Start the sync negotiation */
3564                         ahc->msgout_index = 0;
3565                         ahc->msgout_len = 0;
3566                         ahc_build_transfer_msg(ahc, devinfo);
3567                         ahc->msgout_index = 0;
3568                         response = 1;
3569                 }
3570         } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) {
3571                 /* note asynch xfers and clear flag */
3572                 ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0,
3573                                  /*offset*/0, /*ppr_options*/0,
3574                                  AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
3575                                  /*paused*/TRUE);
3576                 printf("(%s:%c:%d:%d): refuses synchronous negotiation. "
3577                        "Using asynchronous transfers\n",
3578                        ahc_name(ahc), devinfo->channel,
3579                        devinfo->target, devinfo->lun);
3580         } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) {
3581                 int tag_type;
3582                 int mask;
3583
3584                 tag_type = (scb->hscb->control & MSG_SIMPLE_TASK);
3585
3586                 if (tag_type == MSG_SIMPLE_TASK) {
3587                         printf("(%s:%c:%d:%d): refuses tagged commands.  "
3588                                "Performing non-tagged I/O\n", ahc_name(ahc),
3589                                devinfo->channel, devinfo->target, devinfo->lun);
3590                         ahc_set_tags(ahc, devinfo, AHC_QUEUE_NONE);
3591                         mask = ~0x23;
3592                 } else {
3593                         printf("(%s:%c:%d:%d): refuses %s tagged commands.  "
3594                                "Performing simple queue tagged I/O only\n",
3595                                ahc_name(ahc), devinfo->channel, devinfo->target,
3596                                devinfo->lun, tag_type == MSG_ORDERED_TASK
3597                                ? "ordered" : "head of queue");
3598                         ahc_set_tags(ahc, devinfo, AHC_QUEUE_BASIC);
3599                         mask = ~0x03;
3600                 }
3601
3602                 /*
3603                  * Resend the identify for this CCB as the target
3604                  * may believe that the selection is invalid otherwise.
3605                  */
3606                 ahc_outb(ahc, SCB_CONTROL,
3607                          ahc_inb(ahc, SCB_CONTROL) & mask);
3608                 scb->hscb->control &= mask;
3609                 aic_set_transaction_tag(scb, /*enabled*/FALSE,
3610                                         /*type*/MSG_SIMPLE_TASK);
3611                 ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG);
3612                 ahc_assert_atn(ahc);
3613
3614                 /*
3615                  * This transaction is now at the head of
3616                  * the untagged queue for this target.
3617                  */
3618                 if ((ahc->flags & AHC_SCB_BTT) == 0) {
3619                         struct scb_tailq *untagged_q;
3620
3621                         untagged_q =
3622                             &(ahc->untagged_queues[devinfo->target_offset]);
3623                         TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe);
3624                         scb->flags |= SCB_UNTAGGEDQ;
3625                 }
3626                 ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun),
3627                              scb->hscb->tag);
3628
3629                 /*
3630                  * Requeue all tagged commands for this target
3631                  * currently in our posession so they can be
3632                  * converted to untagged commands.
3633                  */
3634                 ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
3635                                    SCB_GET_CHANNEL(ahc, scb),
3636                                    SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL,
3637                                    ROLE_INITIATOR, CAM_REQUEUE_REQ,
3638                                    SEARCH_COMPLETE);
3639         } else {
3640                 /*
3641                  * Otherwise, we ignore it.
3642                  */
3643                 printf("%s:%c:%d: Message reject for %x -- ignored\n",
3644                        ahc_name(ahc), devinfo->channel, devinfo->target,
3645                        last_msg);
3646         }
3647         return (response);
3648 }
3649
3650 /*
3651  * Process an ingnore wide residue message.
3652  */
3653 static void
3654 ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
3655 {
3656         u_int scb_index;
3657         struct scb *scb;
3658
3659         scb_index = ahc_inb(ahc, SCB_TAG);
3660         scb = ahc_lookup_scb(ahc, scb_index);
3661         /*
3662          * XXX Actually check data direction in the sequencer?
3663          * Perhaps add datadir to some spare bits in the hscb?
3664          */
3665         if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0
3666          || aic_get_transfer_dir(scb) != CAM_DIR_IN) {
3667                 /*
3668                  * Ignore the message if we haven't
3669                  * seen an appropriate data phase yet.
3670                  */
3671         } else {
3672                 /*
3673                  * If the residual occurred on the last
3674                  * transfer and the transfer request was
3675                  * expected to end on an odd count, do
3676                  * nothing.  Otherwise, subtract a byte
3677                  * and update the residual count accordingly.
3678                  */
3679                 uint32_t sgptr;
3680
3681                 sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
3682                 if ((sgptr & SG_LIST_NULL) != 0
3683                  && (ahc_inb(ahc, SCB_LUN) & SCB_XFERLEN_ODD) != 0) {
3684                         /*
3685                          * If the residual occurred on the last
3686                          * transfer and the transfer request was
3687                          * expected to end on an odd count, do
3688                          * nothing.
3689                          */
3690                 } else {
3691                         struct ahc_dma_seg *sg;
3692                         uint32_t data_cnt;
3693                         uint32_t data_addr;
3694                         uint32_t sglen;
3695
3696                         /* Pull in all of the sgptr */
3697                         sgptr = ahc_inl(ahc, SCB_RESIDUAL_SGPTR);
3698                         data_cnt = ahc_inl(ahc, SCB_RESIDUAL_DATACNT);
3699
3700                         if ((sgptr & SG_LIST_NULL) != 0) {
3701                                 /*
3702                                  * The residual data count is not updated
3703                                  * for the command run to completion case.
3704                                  * Explicitly zero the count.
3705                                  */
3706                                 data_cnt &= ~AHC_SG_LEN_MASK;
3707                         }
3708
3709                         data_addr = ahc_inl(ahc, SHADDR);
3710
3711                         data_cnt += 1;
3712                         data_addr -= 1;
3713                         sgptr &= SG_PTR_MASK;
3714
3715                         sg = ahc_sg_bus_to_virt(scb, sgptr);
3716
3717                         /*
3718                          * The residual sg ptr points to the next S/G
3719                          * to load so we must go back one.
3720                          */
3721                         sg--;
3722                         sglen = aic_le32toh(sg->len) & AHC_SG_LEN_MASK;
3723                         if (sg != scb->sg_list
3724                          && sglen < (data_cnt & AHC_SG_LEN_MASK)) {
3725
3726                                 sg--;
3727                                 sglen = aic_le32toh(sg->len);
3728                                 /*
3729                                  * Preserve High Address and SG_LIST bits
3730                                  * while setting the count to 1.
3731                                  */
3732                                 data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK));
3733                                 data_addr = aic_le32toh(sg->addr)
3734                                           + (sglen & AHC_SG_LEN_MASK) - 1;
3735
3736                                 /*
3737                                  * Increment sg so it points to the
3738                                  * "next" sg.
3739                                  */
3740                                 sg++;
3741                                 sgptr = ahc_sg_virt_to_bus(scb, sg);
3742                         }
3743                         ahc_outl(ahc, SCB_RESIDUAL_SGPTR, sgptr);
3744                         ahc_outl(ahc, SCB_RESIDUAL_DATACNT, data_cnt);
3745                         /*
3746                          * Toggle the "oddness" of the transfer length
3747                          * to handle this mid-transfer ignore wide
3748                          * residue.  This ensures that the oddness is
3749                          * correct for subsequent data transfers.
3750                          */
3751                         ahc_outb(ahc, SCB_LUN,
3752                                  ahc_inb(ahc, SCB_LUN) ^ SCB_XFERLEN_ODD);
3753                 }
3754         }
3755 }
3756
3757
3758 /*
3759  * Reinitialize the data pointers for the active transfer
3760  * based on its current residual.
3761  */
3762 static void
3763 ahc_reinitialize_dataptrs(struct ahc_softc *ahc)
3764 {
3765         struct   scb *scb;
3766         struct   ahc_dma_seg *sg;
3767         u_int    scb_index;
3768         uint32_t sgptr;
3769         uint32_t resid;
3770         uint32_t dataptr;
3771
3772         scb_index = ahc_inb(ahc, SCB_TAG);
3773         scb = ahc_lookup_scb(ahc, scb_index);
3774         sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24)
3775               | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16)
3776               | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8)
3777               | ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
3778
3779         sgptr &= SG_PTR_MASK;
3780         sg = ahc_sg_bus_to_virt(scb, sgptr);
3781
3782         /* The residual sg_ptr always points to the next sg */
3783         sg--;
3784
3785         resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16)
3786               | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8)
3787               | ahc_inb(ahc, SCB_RESIDUAL_DATACNT);
3788
3789         dataptr = aic_le32toh(sg->addr)
3790                 + (aic_le32toh(sg->len) & AHC_SG_LEN_MASK)
3791                 - resid;
3792         if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
3793                 u_int dscommand1;
3794
3795                 dscommand1 = ahc_inb(ahc, DSCOMMAND1);
3796                 ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
3797                 ahc_outb(ahc, HADDR,
3798                          (aic_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS);
3799                 ahc_outb(ahc, DSCOMMAND1, dscommand1);
3800         }
3801         ahc_outb(ahc, HADDR + 3, dataptr >> 24);
3802         ahc_outb(ahc, HADDR + 2, dataptr >> 16);
3803         ahc_outb(ahc, HADDR + 1, dataptr >> 8);
3804         ahc_outb(ahc, HADDR, dataptr);
3805         ahc_outb(ahc, HCNT + 2, resid >> 16);
3806         ahc_outb(ahc, HCNT + 1, resid >> 8);
3807         ahc_outb(ahc, HCNT, resid);
3808         if ((ahc->features & AHC_ULTRA2) == 0) {
3809                 ahc_outb(ahc, STCNT + 2, resid >> 16);
3810                 ahc_outb(ahc, STCNT + 1, resid >> 8);
3811                 ahc_outb(ahc, STCNT, resid);
3812         }
3813 }
3814
3815 /*
3816  * Handle the effects of issuing a bus device reset message.
3817  */
3818 static void
3819 ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3820                     cam_status status, char *message, int verbose_level)
3821 {
3822 #ifdef AHC_TARGET_MODE
3823         struct ahc_tmode_tstate* tstate;
3824         u_int lun;
3825 #endif
3826         int found;
3827
3828         found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
3829                                CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role,
3830                                status);
3831
3832 #ifdef AHC_TARGET_MODE
3833         /*
3834          * Send an immediate notify ccb to all target mord peripheral
3835          * drivers affected by this action.
3836          */
3837         tstate = ahc->enabled_targets[devinfo->our_scsiid];
3838         if (tstate != NULL) {
3839                 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
3840                         struct ahc_tmode_lstate* lstate;
3841
3842                         lstate = tstate->enabled_luns[lun];
3843                         if (lstate == NULL)
3844                                 continue;
3845
3846                         ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid,
3847                                                MSG_BUS_DEV_RESET, /*arg*/0);
3848                         ahc_send_lstate_events(ahc, lstate);
3849                 }
3850         }
3851 #endif
3852
3853         /*
3854          * Go back to async/narrow transfers and renegotiate.
3855          */
3856         ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
3857                       AHC_TRANS_CUR, /*paused*/TRUE);
3858         ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL,
3859                          /*period*/0, /*offset*/0, /*ppr_options*/0,
3860                          AHC_TRANS_CUR, /*paused*/TRUE);
3861
3862         if (status != CAM_SEL_TIMEOUT)
3863                 ahc_send_async(ahc, devinfo->channel, devinfo->target,
3864                                CAM_LUN_WILDCARD, AC_SENT_BDR, NULL);
3865
3866         if (message != NULL
3867          && (verbose_level <= bootverbose))
3868                 printf("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc),
3869                        message, devinfo->channel, devinfo->target, found);
3870 }
3871
3872 #ifdef AHC_TARGET_MODE
3873 static void
3874 ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
3875                        struct scb *scb)
3876 {
3877
3878         /*
3879          * To facilitate adding multiple messages together,
3880          * each routine should increment the index and len
3881          * variables instead of setting them explicitly.
3882          */
3883         ahc->msgout_index = 0;
3884         ahc->msgout_len = 0;
3885
3886         if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0)
3887                 ahc_build_transfer_msg(ahc, devinfo);
3888         else
3889                 panic("ahc_intr: AWAITING target message with no message");
3890
3891         ahc->msgout_index = 0;
3892         ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
3893 }
3894 #endif
3895 /**************************** Initialization **********************************/
3896 /*
3897  * Allocate a controller structure for a new device
3898  * and perform initial initializion.
3899  */
3900 struct ahc_softc *
3901 ahc_alloc(void *platform_arg, char *name)
3902 {
3903         struct  ahc_softc *ahc;
3904         int     i;
3905
3906 #ifndef __FreeBSD__
3907         ahc = malloc(sizeof(*ahc), M_DEVBUF, M_NOWAIT);
3908         if (!ahc) {
3909                 printf("aic7xxx: cannot malloc softc!\n");
3910                 free(name, M_DEVBUF);
3911                 return NULL;
3912         }
3913 #else
3914         ahc = device_get_softc((device_t)platform_arg);
3915 #endif
3916         memset(ahc, 0, sizeof(*ahc));
3917         ahc->seep_config = malloc(sizeof(*ahc->seep_config),
3918                                   M_DEVBUF, M_NOWAIT);
3919         if (ahc->seep_config == NULL) {
3920 #ifndef __FreeBSD__
3921                 free(ahc, M_DEVBUF);
3922 #endif
3923                 free(name, M_DEVBUF);
3924                 return (NULL);
3925         }
3926         LIST_INIT(&ahc->pending_scbs);
3927         LIST_INIT(&ahc->timedout_scbs);
3928         /* We don't know our unit number until the OSM sets it */
3929         ahc->name = name;
3930         ahc->unit = -1;
3931         ahc->description = NULL;
3932         ahc->channel = 'A';
3933         ahc->channel_b = 'B';
3934         ahc->chip = AHC_NONE;
3935         ahc->features = AHC_FENONE;
3936         ahc->bugs = AHC_BUGNONE;
3937         ahc->flags = AHC_FNONE;
3938         /*
3939          * Default to all error reporting enabled with the
3940          * sequencer operating at its fastest speed.
3941          * The bus attach code may modify this.
3942          */
3943         ahc->seqctl = FASTMODE;
3944
3945         for (i = 0; i < AHC_NUM_TARGETS; i++)
3946                 TAILQ_INIT(&ahc->untagged_queues[i]);
3947         if (ahc_platform_alloc(ahc, platform_arg) != 0) {
3948                 ahc_free(ahc);
3949                 ahc = NULL;
3950         }
3951         ahc_lockinit(ahc);
3952         return (ahc);
3953 }
3954
3955 int
3956 ahc_softc_init(struct ahc_softc *ahc)
3957 {
3958
3959         /* The IRQMS bit is only valid on VL and EISA chips */
3960         if ((ahc->chip & AHC_PCI) == 0)
3961                 ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS;
3962         else
3963                 ahc->unpause = 0;
3964         ahc->pause = ahc->unpause | PAUSE;
3965         /* XXX The shared scb data stuff should be deprecated */
3966         if (ahc->scb_data == NULL) {
3967                 ahc->scb_data = malloc(sizeof(*ahc->scb_data),
3968                                        M_DEVBUF, M_NOWAIT);
3969                 if (ahc->scb_data == NULL)
3970                         return (ENOMEM);
3971                 memset(ahc->scb_data, 0, sizeof(*ahc->scb_data));
3972         }
3973
3974         return (0);
3975 }
3976
3977 void
3978 ahc_softc_insert(struct ahc_softc *ahc)
3979 {
3980         struct ahc_softc *list_ahc;
3981
3982 #if AIC_PCI_CONFIG > 0
3983         /*
3984          * Second Function PCI devices need to inherit some
3985          * settings from function 0.
3986          */
3987         if ((ahc->chip & AHC_BUS_MASK) == AHC_PCI
3988          && (ahc->features & AHC_MULTI_FUNC) != 0) {
3989                 TAILQ_FOREACH(list_ahc, &ahc_tailq, links) {
3990                         aic_dev_softc_t list_pci;
3991                         aic_dev_softc_t pci;
3992
3993                         list_pci = list_ahc->dev_softc;
3994                         pci = ahc->dev_softc;
3995                         if (aic_get_pci_slot(list_pci) == aic_get_pci_slot(pci)
3996                          && aic_get_pci_bus(list_pci) == aic_get_pci_bus(pci)) {
3997                                 struct ahc_softc *master;
3998                                 struct ahc_softc *slave;
3999
4000                                 if (aic_get_pci_function(list_pci) == 0) {
4001                                         master = list_ahc;
4002                                         slave = ahc;
4003                                 } else {
4004                                         master = ahc;
4005                                         slave = list_ahc;
4006                                 }
4007                                 slave->flags &= ~AHC_BIOS_ENABLED;
4008                                 slave->flags |=
4009                                     master->flags & AHC_BIOS_ENABLED;
4010                                 slave->flags &= ~AHC_PRIMARY_CHANNEL;
4011                                 slave->flags |=
4012                                     master->flags & AHC_PRIMARY_CHANNEL;
4013                                 break;
4014                         }
4015                 }
4016         }
4017 #endif
4018
4019         /*
4020          * Insertion sort into our list of softcs.
4021          */
4022         list_ahc = TAILQ_FIRST(&ahc_tailq);
4023         while (list_ahc != NULL
4024             && ahc_softc_comp(ahc, list_ahc) <= 0)
4025                 list_ahc = TAILQ_NEXT(list_ahc, links);
4026         if (list_ahc != NULL)
4027                 TAILQ_INSERT_BEFORE(list_ahc, ahc, links);
4028         else
4029                 TAILQ_INSERT_TAIL(&ahc_tailq, ahc, links);
4030         ahc->init_level++;
4031 }
4032
4033 void
4034 ahc_set_unit(struct ahc_softc *ahc, int unit)
4035 {
4036         ahc->unit = unit;
4037 }
4038
4039 void
4040 ahc_set_name(struct ahc_softc *ahc, char *name)
4041 {
4042         if (ahc->name != NULL)
4043                 free(ahc->name, M_DEVBUF);
4044         ahc->name = name;
4045 }
4046
4047 void
4048 ahc_free(struct ahc_softc *ahc)
4049 {
4050         int i;
4051
4052         ahc_terminate_recovery_thread(ahc);
4053         switch (ahc->init_level) {
4054         default:
4055         case 5:
4056                 ahc_shutdown(ahc);
4057                 /* FALLTHROUGH */
4058         case 4:
4059                 aic_dmamap_unload(ahc, ahc->shared_data_dmat,
4060                                   ahc->shared_data_dmamap);
4061                 /* FALLTHROUGH */
4062         case 3:
4063                 aic_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo,
4064                                 ahc->shared_data_dmamap);
4065                 aic_dmamap_destroy(ahc, ahc->shared_data_dmat,
4066                                    ahc->shared_data_dmamap);
4067                 /* FALLTHROUGH */
4068         case 2:
4069                 aic_dma_tag_destroy(ahc, ahc->shared_data_dmat);
4070         case 1:
4071 #ifndef __linux__
4072                 aic_dma_tag_destroy(ahc, ahc->buffer_dmat);
4073 #endif
4074                 break;
4075         case 0:
4076                 break;
4077         }
4078
4079 #ifndef __linux__
4080         aic_dma_tag_destroy(ahc, ahc->parent_dmat);
4081 #endif
4082         ahc_platform_free(ahc);
4083         ahc_fini_scbdata(ahc);
4084         for (i = 0; i < AHC_NUM_TARGETS; i++) {
4085                 struct ahc_tmode_tstate *tstate;
4086
4087                 tstate = ahc->enabled_targets[i];
4088                 if (tstate != NULL) {
4089 #ifdef AHC_TARGET_MODE
4090                         int j;
4091
4092                         for (j = 0; j < AHC_NUM_LUNS; j++) {
4093                                 struct ahc_tmode_lstate *lstate;
4094
4095                                 lstate = tstate->enabled_luns[j];
4096                                 if (lstate != NULL) {
4097                                         xpt_free_path(lstate->path);
4098                                         free(lstate, M_DEVBUF);
4099                                 }
4100                         }
4101 #endif
4102                         free(tstate, M_DEVBUF);
4103                 }
4104         }
4105 #ifdef AHC_TARGET_MODE
4106         if (ahc->black_hole != NULL) {
4107                 xpt_free_path(ahc->black_hole->path);
4108                 free(ahc->black_hole, M_DEVBUF);
4109         }
4110 #endif
4111         if (ahc->name != NULL)
4112                 free(ahc->name, M_DEVBUF);
4113         if (ahc->seep_config != NULL)
4114                 free(ahc->seep_config, M_DEVBUF);
4115 #ifndef __FreeBSD__
4116         free(ahc, M_DEVBUF);
4117 #endif
4118         return;
4119 }
4120
4121 void
4122 ahc_shutdown(void *arg)
4123 {
4124         struct  ahc_softc *ahc;
4125         int     i;
4126
4127         ahc = (struct ahc_softc *)arg;
4128
4129         /* This will reset most registers to 0, but not all */
4130         ahc_reset(ahc, /*reinit*/FALSE);
4131         ahc_outb(ahc, SCSISEQ, 0);
4132         ahc_outb(ahc, SXFRCTL0, 0);
4133         ahc_outb(ahc, DSPCISTATUS, 0);
4134
4135         for (i = TARG_SCSIRATE; i < SCSICONF; i++)
4136                 ahc_outb(ahc, i, 0);
4137 }
4138
4139 /*
4140  * Reset the controller and record some information about it
4141  * that is only available just after a reset.  If "reinit" is
4142  * non-zero, this reset occured after initial configuration
4143  * and the caller requests that the chip be fully reinitialized
4144  * to a runable state.  Chip interrupts are *not* enabled after
4145  * a reinitialization.  The caller must enable interrupts via
4146  * ahc_intr_enable().
4147  */
4148 int
4149 ahc_reset(struct ahc_softc *ahc, int reinit)
4150 {
4151         u_int   sblkctl;
4152         u_int   sxfrctl1_a, sxfrctl1_b;
4153         int     error;
4154         int     wait;
4155
4156         /*
4157          * Preserve the value of the SXFRCTL1 register for all channels.
4158          * It contains settings that affect termination and we don't want
4159          * to disturb the integrity of the bus.
4160          */
4161         ahc_pause(ahc);
4162         sxfrctl1_b = 0;
4163         if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) {
4164                 u_int sblkctl;
4165
4166                 /*
4167                  * Save channel B's settings in case this chip
4168                  * is setup for TWIN channel operation.
4169                  */
4170                 sblkctl = ahc_inb(ahc, SBLKCTL);
4171                 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4172                 sxfrctl1_b = ahc_inb(ahc, SXFRCTL1);
4173                 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4174         }
4175         sxfrctl1_a = ahc_inb(ahc, SXFRCTL1);
4176
4177         ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause);
4178
4179         /*
4180          * Ensure that the reset has finished.  We delay 1000us
4181          * prior to reading the register to make sure the chip
4182          * has sufficiently completed its reset to handle register
4183          * accesses.
4184          */
4185         wait = 1000;
4186         do {
4187                 aic_delay(1000);
4188         } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK));
4189
4190         if (wait == 0) {
4191                 printf("%s: WARNING - Failed chip reset!  "
4192                        "Trying to initialize anyway.\n", ahc_name(ahc));
4193         }
4194         ahc_outb(ahc, HCNTRL, ahc->pause);
4195
4196         /* Determine channel configuration */
4197         sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE);
4198         /* No Twin Channel PCI cards */
4199         if ((ahc->chip & AHC_PCI) != 0)
4200                 sblkctl &= ~SELBUSB;
4201         switch (sblkctl) {
4202         case 0:
4203                 /* Single Narrow Channel */
4204                 break;
4205         case 2:
4206                 /* Wide Channel */
4207                 ahc->features |= AHC_WIDE;
4208                 break;
4209         case 8:
4210                 /* Twin Channel */
4211                 ahc->features |= AHC_TWIN;
4212                 break;
4213         default:
4214                 printf(" Unsupported adapter type.  Ignoring\n");
4215                 return(-1);
4216         }
4217
4218         /*
4219          * Reload sxfrctl1.
4220          *
4221          * We must always initialize STPWEN to 1 before we
4222          * restore the saved values.  STPWEN is initialized
4223          * to a tri-state condition which can only be cleared
4224          * by turning it on.
4225          */
4226         if ((ahc->features & AHC_TWIN) != 0) {
4227                 u_int sblkctl;
4228
4229                 sblkctl = ahc_inb(ahc, SBLKCTL);
4230                 ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
4231                 ahc_outb(ahc, SXFRCTL1, sxfrctl1_b);
4232                 ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
4233         }
4234         ahc_outb(ahc, SXFRCTL1, sxfrctl1_a);
4235
4236         error = 0;
4237         if (reinit != 0)
4238                 /*
4239                  * If a recovery action has forced a chip reset,
4240                  * re-initialize the chip to our liking.
4241                  */
4242                 error = ahc->bus_chip_init(ahc);
4243 #ifdef AHC_DUMP_SEQ
4244         else
4245                 ahc_dumpseq(ahc);
4246 #endif
4247
4248         return (error);
4249 }
4250
4251 /*
4252  * Determine the number of SCBs available on the controller
4253  */
4254 int
4255 ahc_probe_scbs(struct ahc_softc *ahc) {
4256         int i;
4257
4258         for (i = 0; i < AHC_SCB_MAX; i++) {
4259
4260                 ahc_outb(ahc, SCBPTR, i);
4261                 ahc_outb(ahc, SCB_BASE, i);
4262                 if (ahc_inb(ahc, SCB_BASE) != i)
4263                         break;
4264                 ahc_outb(ahc, SCBPTR, 0);
4265                 if (ahc_inb(ahc, SCB_BASE) != 0)
4266                         break;
4267         }
4268         return (i);
4269 }
4270
4271 static void
4272 ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
4273 {
4274         bus_addr_t *baddr;
4275
4276         baddr = (bus_addr_t *)arg;
4277         *baddr = segs->ds_addr;
4278 }
4279
4280 static void
4281 ahc_build_free_scb_list(struct ahc_softc *ahc)
4282 {
4283         int scbsize;
4284         int i;
4285
4286         scbsize = 32;
4287         if ((ahc->flags & AHC_LSCBS_ENABLED) != 0)
4288                 scbsize = 64;
4289
4290         for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
4291                 int j;
4292
4293                 ahc_outb(ahc, SCBPTR, i);
4294
4295                 /*
4296                  * Touch all SCB bytes to avoid parity errors
4297                  * should one of our debugging routines read
4298                  * an otherwise uninitiatlized byte.
4299                  */
4300                 for (j = 0; j < scbsize; j++)
4301                         ahc_outb(ahc, SCB_BASE+j, 0xFF);
4302
4303                 /* Clear the control byte. */
4304                 ahc_outb(ahc, SCB_CONTROL, 0);
4305
4306                 /* Set the next pointer */
4307                 if ((ahc->flags & AHC_PAGESCBS) != 0)
4308                         ahc_outb(ahc, SCB_NEXT, i+1);
4309                 else
4310                         ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4311
4312                 /* Make the tag number, SCSIID, and lun invalid */
4313                 ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
4314                 ahc_outb(ahc, SCB_SCSIID, 0xFF);
4315                 ahc_outb(ahc, SCB_LUN, 0xFF);
4316         }
4317
4318         if ((ahc->flags & AHC_PAGESCBS) != 0) {
4319                 /* SCB 0 heads the free list. */
4320                 ahc_outb(ahc, FREE_SCBH, 0);
4321         } else {
4322                 /* No free list. */
4323                 ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL);
4324         }
4325
4326         /* Make sure that the last SCB terminates the free list */
4327         ahc_outb(ahc, SCBPTR, i-1);
4328         ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
4329 }
4330
4331 static int
4332 ahc_init_scbdata(struct ahc_softc *ahc)
4333 {
4334         struct scb_data *scb_data;
4335
4336         scb_data = ahc->scb_data;
4337         SLIST_INIT(&scb_data->free_scbs);
4338         SLIST_INIT(&scb_data->sg_maps);
4339
4340         /* Allocate SCB resources */
4341         scb_data->scbarray =
4342             (struct scb *)malloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC,
4343                                  M_DEVBUF, M_NOWAIT);
4344         if (scb_data->scbarray == NULL)
4345                 return (ENOMEM);
4346         memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC);
4347
4348         /* Determine the number of hardware SCBs and initialize them */
4349
4350         scb_data->maxhscbs = ahc_probe_scbs(ahc);
4351         if (ahc->scb_data->maxhscbs == 0) {
4352                 printf("%s: No SCB space found\n", ahc_name(ahc));
4353                 return (ENXIO);
4354         }
4355
4356         /*
4357          * Create our DMA tags.  These tags define the kinds of device
4358          * accessible memory allocations and memory mappings we will
4359          * need to perform during normal operation.
4360          *
4361          * Unless we need to further restrict the allocation, we rely
4362          * on the restrictions of the parent dmat, hence the common
4363          * use of MAXADDR and MAXSIZE.
4364          */
4365
4366         /* DMA tag for our hardware scb structures */
4367         if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4368                                /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4369                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4370                                /*highaddr*/BUS_SPACE_MAXADDR,
4371                                /*filter*/NULL, /*filterarg*/NULL,
4372                                AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
4373                                /*nsegments*/1,
4374                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4375                                /*flags*/0, &scb_data->hscb_dmat) != 0) {
4376                 goto error_exit;
4377         }
4378
4379         scb_data->init_level++;
4380
4381         /* Allocation for our hscbs */
4382         if (aic_dmamem_alloc(ahc, scb_data->hscb_dmat,
4383                              (void **)&scb_data->hscbs,
4384                              BUS_DMA_NOWAIT | BUS_DMA_COHERENT,
4385                              &scb_data->hscb_dmamap) != 0) {
4386                 goto error_exit;
4387         }
4388
4389         scb_data->init_level++;
4390
4391         /* And permanently map them */
4392         aic_dmamap_load(ahc, scb_data->hscb_dmat, scb_data->hscb_dmamap,
4393                         scb_data->hscbs,
4394                         AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
4395                         ahc_dmamap_cb, &scb_data->hscb_busaddr, /*flags*/0);
4396
4397         scb_data->init_level++;
4398
4399         /* DMA tag for our sense buffers */
4400         if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4401                                /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4402                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4403                                /*highaddr*/BUS_SPACE_MAXADDR,
4404                                /*filter*/NULL, /*filterarg*/NULL,
4405                                AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
4406                                /*nsegments*/1,
4407                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4408                                /*flags*/0, &scb_data->sense_dmat) != 0) {
4409                 goto error_exit;
4410         }
4411
4412         scb_data->init_level++;
4413
4414         /* Allocate them */
4415         if (aic_dmamem_alloc(ahc, scb_data->sense_dmat,
4416                              (void **)&scb_data->sense,
4417                              BUS_DMA_NOWAIT, &scb_data->sense_dmamap) != 0) {
4418                 goto error_exit;
4419         }
4420
4421         scb_data->init_level++;
4422
4423         /* And permanently map them */
4424         aic_dmamap_load(ahc, scb_data->sense_dmat, scb_data->sense_dmamap,
4425                         scb_data->sense,
4426                         AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
4427                         ahc_dmamap_cb, &scb_data->sense_busaddr, /*flags*/0);
4428
4429         scb_data->init_level++;
4430
4431         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
4432         if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/8,
4433                                /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4434                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4435                                /*highaddr*/BUS_SPACE_MAXADDR,
4436                                /*filter*/NULL, /*filterarg*/NULL,
4437                                PAGE_SIZE, /*nsegments*/1,
4438                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4439                                /*flags*/0, &scb_data->sg_dmat) != 0) {
4440                 goto error_exit;
4441         }
4442
4443         scb_data->init_level++;
4444
4445         /* Perform initial CCB allocation */
4446         memset(scb_data->hscbs, 0,
4447                AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb));
4448         while (ahc_alloc_scbs(ahc) != 0)
4449                 ;
4450
4451         if (scb_data->numscbs == 0) {
4452                 printf("%s: ahc_init_scbdata - "
4453                        "Unable to allocate initial scbs\n",
4454                        ahc_name(ahc));
4455                 goto error_exit;
4456         }
4457
4458         /*
4459          * Reserve the next queued SCB.
4460          */
4461         ahc->next_queued_scb = ahc_get_scb(ahc);
4462
4463         /*
4464          * Note that we were successfull
4465          */
4466         return (0);
4467
4468 error_exit:
4469
4470         return (ENOMEM);
4471 }
4472
4473 static void
4474 ahc_fini_scbdata(struct ahc_softc *ahc)
4475 {
4476         struct scb_data *scb_data;
4477
4478         scb_data = ahc->scb_data;
4479         if (scb_data == NULL)
4480                 return;
4481
4482         switch (scb_data->init_level) {
4483         default:
4484         case 7:
4485         {
4486                 struct sg_map_node *sg_map;
4487
4488                 while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) {
4489                         SLIST_REMOVE_HEAD(&scb_data->sg_maps, links);
4490                         aic_dmamap_unload(ahc, scb_data->sg_dmat,
4491                                           sg_map->sg_dmamap);
4492                         aic_dmamem_free(ahc, scb_data->sg_dmat,
4493                                         sg_map->sg_vaddr,
4494                                         sg_map->sg_dmamap);
4495                         free(sg_map, M_DEVBUF);
4496                 }
4497                 aic_dma_tag_destroy(ahc, scb_data->sg_dmat);
4498         }
4499         case 6:
4500                 aic_dmamap_unload(ahc, scb_data->sense_dmat,
4501                                   scb_data->sense_dmamap);
4502         case 5:
4503                 aic_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense,
4504                                 scb_data->sense_dmamap);
4505                 aic_dmamap_destroy(ahc, scb_data->sense_dmat,
4506                                    scb_data->sense_dmamap);
4507         case 4:
4508                 aic_dma_tag_destroy(ahc, scb_data->sense_dmat);
4509         case 3:
4510                 aic_dmamap_unload(ahc, scb_data->hscb_dmat,
4511                                   scb_data->hscb_dmamap);
4512         case 2:
4513                 aic_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs,
4514                                 scb_data->hscb_dmamap);
4515                 aic_dmamap_destroy(ahc, scb_data->hscb_dmat,
4516                                    scb_data->hscb_dmamap);
4517         case 1:
4518                 aic_dma_tag_destroy(ahc, scb_data->hscb_dmat);
4519                 break;
4520         case 0:
4521                 break;
4522         }
4523         if (scb_data->scbarray != NULL)
4524                 free(scb_data->scbarray, M_DEVBUF);
4525 }
4526
4527 int
4528 ahc_alloc_scbs(struct ahc_softc *ahc)
4529 {
4530         struct scb_data *scb_data;
4531         struct scb *next_scb;
4532         struct sg_map_node *sg_map;
4533         bus_addr_t physaddr;
4534         struct ahc_dma_seg *segs;
4535         int newcount;
4536         int i;
4537
4538         scb_data = ahc->scb_data;
4539         if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC)
4540                 /* Can't allocate any more */
4541                 return (0);
4542
4543         next_scb = &scb_data->scbarray[scb_data->numscbs];
4544
4545         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
4546
4547         if (sg_map == NULL)
4548                 return (0);
4549
4550         /* Allocate S/G space for the next batch of SCBS */
4551         if (aic_dmamem_alloc(ahc, scb_data->sg_dmat,
4552                              (void **)&sg_map->sg_vaddr,
4553                              BUS_DMA_NOWAIT | BUS_DMA_COHERENT,
4554                              &sg_map->sg_dmamap) != 0) {
4555                 free(sg_map, M_DEVBUF);
4556                 return (0);
4557         }
4558
4559         SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links);
4560
4561         aic_dmamap_load(ahc, scb_data->sg_dmat, sg_map->sg_dmamap,
4562                         sg_map->sg_vaddr, PAGE_SIZE, ahc_dmamap_cb,
4563                         &sg_map->sg_physaddr, /*flags*/0);
4564
4565         segs = sg_map->sg_vaddr;
4566         physaddr = sg_map->sg_physaddr;
4567
4568         newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg)));
4569         newcount = MIN(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs));
4570         for (i = 0; i < newcount; i++) {
4571                 struct scb_platform_data *pdata;
4572 #ifndef __linux__
4573                 int error;
4574 #endif
4575                 pdata = (struct scb_platform_data *)malloc(sizeof(*pdata),
4576                                                            M_DEVBUF, M_NOWAIT);
4577                 if (pdata == NULL)
4578                         break;
4579                 next_scb->platform_data = pdata;
4580                 next_scb->sg_map = sg_map;
4581                 next_scb->sg_list = segs;
4582                 /*
4583                  * The sequencer always starts with the second entry.
4584                  * The first entry is embedded in the scb.
4585                  */
4586                 next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg);
4587                 next_scb->ahc_softc = ahc;
4588                 next_scb->flags = SCB_FLAG_NONE;
4589 #ifndef __linux__
4590                 error = aic_dmamap_create(ahc, ahc->buffer_dmat, /*flags*/0,
4591                                           &next_scb->dmamap);
4592                 if (error != 0)
4593                         break;
4594 #endif
4595                 next_scb->hscb = &scb_data->hscbs[scb_data->numscbs];
4596                 next_scb->hscb->tag = ahc->scb_data->numscbs;
4597                 aic_timer_init(&next_scb->io_timer);
4598                 SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs,
4599                                   next_scb, links.sle);
4600                 segs += AHC_NSEG;
4601                 physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg));
4602                 next_scb++;
4603                 ahc->scb_data->numscbs++;
4604         }
4605         return (i);
4606 }
4607
4608 void
4609 ahc_controller_info(struct ahc_softc *ahc, char *buf)
4610 {
4611         int len;
4612
4613         len = sprintf(buf, "%s: ", ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]);
4614         buf += len;
4615         if ((ahc->features & AHC_TWIN) != 0)
4616                 len = sprintf(buf, "Twin Channel, A SCSI Id=%d, "
4617                               "B SCSI Id=%d, primary %c, ",
4618                               ahc->our_id, ahc->our_id_b,
4619                               (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A');
4620         else {
4621                 const char *speed;
4622                 const char *type;
4623
4624                 speed = "";
4625                 if ((ahc->features & AHC_ULTRA) != 0) {
4626                         speed = "Ultra ";
4627                 } else if ((ahc->features & AHC_DT) != 0) {
4628                         speed = "Ultra160 ";
4629                 } else if ((ahc->features & AHC_ULTRA2) != 0) {
4630                         speed = "Ultra2 ";
4631                 }
4632                 if ((ahc->features & AHC_WIDE) != 0) {
4633                         type = "Wide";
4634                 } else {
4635                         type = "Single";
4636                 }
4637                 len = sprintf(buf, "%s%s Channel %c, SCSI Id=%d, ",
4638                               speed, type, ahc->channel, ahc->our_id);
4639         }
4640         buf += len;
4641
4642         if ((ahc->flags & AHC_PAGESCBS) != 0)
4643                 sprintf(buf, "%d/%d SCBs",
4644                         ahc->scb_data->maxhscbs, AHC_MAX_QUEUE);
4645         else
4646                 sprintf(buf, "%d SCBs", ahc->scb_data->maxhscbs);
4647 }
4648
4649 int
4650 ahc_chip_init(struct ahc_softc *ahc)
4651 {
4652         int      term;
4653         int      error;
4654         u_int    i;
4655         u_int    scsi_conf;
4656         u_int    scsiseq_template;
4657         uint32_t physaddr;
4658
4659         ahc_outb(ahc, SEQ_FLAGS, 0);
4660         ahc_outb(ahc, SEQ_FLAGS2, 0);
4661
4662         /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/
4663         if (ahc->features & AHC_TWIN) {
4664
4665                 /*
4666                  * Setup Channel B first.
4667                  */
4668                 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB);
4669                 term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0;
4670                 ahc_outb(ahc, SCSIID, ahc->our_id_b);
4671                 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
4672                 ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
4673                                         |term|ahc->seltime_b|ENSTIMER|ACTNEGEN);
4674                 if ((ahc->features & AHC_ULTRA2) != 0)
4675                         ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
4676                 ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
4677                 ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
4678
4679                 /* Select Channel A */
4680                 ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB);
4681         }
4682         term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0;
4683         if ((ahc->features & AHC_ULTRA2) != 0)
4684                 ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id);
4685         else
4686                 ahc_outb(ahc, SCSIID, ahc->our_id);
4687         scsi_conf = ahc_inb(ahc, SCSICONF);
4688         ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
4689                                 |term|ahc->seltime
4690                                 |ENSTIMER|ACTNEGEN);
4691         if ((ahc->features & AHC_ULTRA2) != 0)
4692                 ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
4693         ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
4694         ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
4695
4696         /* There are no untagged SCBs active yet. */
4697         for (i = 0; i < 16; i++) {
4698                 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0));
4699                 if ((ahc->flags & AHC_SCB_BTT) != 0) {
4700                         int lun;
4701
4702                         /*
4703                          * The SCB based BTT allows an entry per
4704                          * target and lun pair.
4705                          */
4706                         for (lun = 1; lun < AHC_NUM_LUNS; lun++)
4707                                 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun));
4708                 }
4709         }
4710
4711         /* All of our queues are empty */
4712         for (i = 0; i < 256; i++)
4713                 ahc->qoutfifo[i] = SCB_LIST_NULL;
4714         ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD);
4715
4716         for (i = 0; i < 256; i++)
4717                 ahc->qinfifo[i] = SCB_LIST_NULL;
4718
4719         if ((ahc->features & AHC_MULTI_TID) != 0) {
4720                 ahc_outb(ahc, TARGID, 0);
4721                 ahc_outb(ahc, TARGID + 1, 0);
4722         }
4723
4724         /*
4725          * Tell the sequencer where it can find our arrays in memory.
4726          */
4727         physaddr = ahc->scb_data->hscb_busaddr;
4728         ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF);
4729         ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF);
4730         ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF);
4731         ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF);
4732
4733         physaddr = ahc->shared_data_busaddr;
4734         ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF);
4735         ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF);
4736         ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF);
4737         ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF);
4738
4739         /*
4740          * Initialize the group code to command length table.
4741          * This overrides the values in TARG_SCSIRATE, so only
4742          * setup the table after we have processed that information.
4743          */
4744         ahc_outb(ahc, CMDSIZE_TABLE, 5);
4745         ahc_outb(ahc, CMDSIZE_TABLE + 1, 9);
4746         ahc_outb(ahc, CMDSIZE_TABLE + 2, 9);
4747         ahc_outb(ahc, CMDSIZE_TABLE + 3, 0);
4748         ahc_outb(ahc, CMDSIZE_TABLE + 4, 15);
4749         ahc_outb(ahc, CMDSIZE_TABLE + 5, 11);
4750         ahc_outb(ahc, CMDSIZE_TABLE + 6, 0);
4751         ahc_outb(ahc, CMDSIZE_TABLE + 7, 0);
4752
4753         if ((ahc->features & AHC_HS_MAILBOX) != 0)
4754                 ahc_outb(ahc, HS_MAILBOX, 0);
4755
4756         /* Tell the sequencer of our initial queue positions */
4757         if ((ahc->features & AHC_TARGETMODE) != 0) {
4758                 ahc->tqinfifonext = 1;
4759                 ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1);
4760                 ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
4761         }
4762         ahc->qinfifonext = 0;
4763         ahc->qoutfifonext = 0;
4764         if ((ahc->features & AHC_QUEUE_REGS) != 0) {
4765                 ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256);
4766                 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
4767                 ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext);
4768                 ahc_outb(ahc, SDSCB_QOFF, 0);
4769         } else {
4770                 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
4771                 ahc_outb(ahc, QINPOS, ahc->qinfifonext);
4772                 ahc_outb(ahc, QOUTPOS, ahc->qoutfifonext);
4773         }
4774
4775         /* We don't have any waiting selections */
4776         ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL);
4777
4778         /* Our disconnection list is empty too */
4779         ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL);
4780
4781         /* Message out buffer starts empty */
4782         ahc_outb(ahc, MSG_OUT, MSG_NOOP);
4783
4784         /*
4785          * Setup the allowed SCSI Sequences based on operational mode.
4786          * If we are a target, we'll enalbe select in operations once
4787          * we've had a lun enabled.
4788          */
4789         scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP;
4790         if ((ahc->flags & AHC_INITIATORROLE) != 0)
4791                 scsiseq_template |= ENRSELI;
4792         ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template);
4793
4794         /* Initialize our list of free SCBs. */
4795         ahc_build_free_scb_list(ahc);
4796
4797         /*
4798          * Tell the sequencer which SCB will be the next one it receives.
4799          */
4800         ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
4801
4802         /*
4803          * Load the Sequencer program and Enable the adapter
4804          * in "fast" mode.
4805          */
4806         if (bootverbose)
4807                 printf("%s: Downloading Sequencer Program...",
4808                        ahc_name(ahc));
4809
4810         error = ahc_loadseq(ahc);
4811         if (error != 0)
4812                 return (error);
4813
4814         if ((ahc->features & AHC_ULTRA2) != 0) {
4815                 int wait;
4816
4817                 /*
4818                  * Wait for up to 500ms for our transceivers
4819                  * to settle.  If the adapter does not have
4820                  * a cable attached, the transceivers may
4821                  * never settle, so don't complain if we
4822                  * fail here.
4823                  */
4824                 for (wait = 5000;
4825                      (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait;
4826                      wait--)
4827                         aic_delay(100);
4828         }
4829         ahc_restart(ahc);
4830         return (0);
4831 }
4832
4833 /*
4834  * Start the board, ready for normal operation
4835  */
4836 int
4837 ahc_init(struct ahc_softc *ahc)
4838 {
4839         int      max_targ;
4840         int      error;
4841         u_int    i;
4842         u_int    scsi_conf;
4843         u_int    ultraenb;
4844         u_int    discenable;
4845         u_int    tagenable;
4846         size_t   driver_data_size;
4847
4848 #ifdef AHC_DEBUG
4849         if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0)
4850                 ahc->flags |= AHC_SEQUENCER_DEBUG;
4851 #endif
4852
4853 #ifdef AHC_PRINT_SRAM
4854         printf("Scratch Ram:");
4855         for (i = 0x20; i < 0x5f; i++) {
4856                 if (((i % 8) == 0) && (i != 0)) {
4857                         printf ("\n              ");
4858                 }
4859                 printf (" 0x%x", ahc_inb(ahc, i));
4860         }
4861         if ((ahc->features & AHC_MORE_SRAM) != 0) {
4862                 for (i = 0x70; i < 0x7f; i++) {
4863                         if (((i % 8) == 0) && (i != 0)) {
4864                                 printf ("\n              ");
4865                         }
4866                         printf (" 0x%x", ahc_inb(ahc, i));
4867                 }
4868         }
4869         printf ("\n");
4870         /*
4871          * Reading uninitialized scratch ram may
4872          * generate parity errors.
4873          */
4874         ahc_outb(ahc, CLRINT, CLRPARERR);
4875         ahc_outb(ahc, CLRINT, CLRBRKADRINT);
4876 #endif
4877         max_targ = 15;
4878
4879         /*
4880          * Assume we have a board at this stage and it has been reset.
4881          */
4882         if ((ahc->flags & AHC_USEDEFAULTS) != 0)
4883                 ahc->our_id = ahc->our_id_b = 7;
4884
4885         /*
4886          * Default to allowing initiator operations.
4887          */
4888         ahc->flags |= AHC_INITIATORROLE;
4889
4890         /*
4891          * Only allow target mode features if this unit has them enabled.
4892          */
4893         if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0)
4894                 ahc->features &= ~AHC_TARGETMODE;
4895
4896 #ifndef __linux__
4897         /* DMA tag for mapping buffers into device visible space. */
4898         if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4899                                /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4900                                /*lowaddr*/ahc->flags & AHC_39BIT_ADDRESSING
4901                                         ? (bus_addr_t)0x7FFFFFFFFFULL
4902                                         : BUS_SPACE_MAXADDR_32BIT,
4903                                /*highaddr*/BUS_SPACE_MAXADDR,
4904                                /*filter*/NULL, /*filterarg*/NULL,
4905                                /*maxsize*/(AHC_NSEG - 1) * PAGE_SIZE,
4906                                /*nsegments*/AHC_NSEG,
4907                                /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
4908                                /*flags*/BUS_DMA_ALLOCNOW,
4909                                &ahc->buffer_dmat) != 0) {
4910                 return (ENOMEM);
4911         }
4912 #endif
4913
4914         ahc->init_level++;
4915
4916         /*
4917          * DMA tag for our command fifos and other data in system memory
4918          * the card's sequencer must be able to access.  For initiator
4919          * roles, we need to allocate space for the qinfifo and qoutfifo.
4920          * The qinfifo and qoutfifo are composed of 256 1 byte elements.
4921          * When providing for the target mode role, we must additionally
4922          * provide space for the incoming target command fifo and an extra
4923          * byte to deal with a dma bug in some chip versions.
4924          */
4925         driver_data_size = 2 * 256 * sizeof(uint8_t);
4926         if ((ahc->features & AHC_TARGETMODE) != 0)
4927                 driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd)
4928                                  + /*DMA WideOdd Bug Buffer*/1;
4929         if (aic_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
4930                                /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
4931                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
4932                                /*highaddr*/BUS_SPACE_MAXADDR,
4933                                /*filter*/NULL, /*filterarg*/NULL,
4934                                driver_data_size,
4935                                /*nsegments*/1,
4936                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
4937                                /*flags*/0, &ahc->shared_data_dmat) != 0) {
4938                 return (ENOMEM);
4939         }
4940
4941         ahc->init_level++;
4942
4943         /* Allocation of driver data */
4944         if (aic_dmamem_alloc(ahc, ahc->shared_data_dmat,
4945                              (void **)&ahc->qoutfifo,
4946                              BUS_DMA_NOWAIT | BUS_DMA_COHERENT,
4947                              &ahc->shared_data_dmamap) != 0) {
4948                 return (ENOMEM);
4949         }
4950
4951         ahc->init_level++;
4952
4953         /* And permanently map it in */
4954         aic_dmamap_load(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
4955                         ahc->qoutfifo, driver_data_size, ahc_dmamap_cb,
4956                         &ahc->shared_data_busaddr, /*flags*/0);
4957
4958         if ((ahc->features & AHC_TARGETMODE) != 0) {
4959                 ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo;
4960                 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS];
4961                 ahc->dma_bug_buf = ahc->shared_data_busaddr
4962                                  + driver_data_size - 1;
4963                 /* All target command blocks start out invalid. */
4964                 for (i = 0; i < AHC_TMODE_CMDS; i++)
4965                         ahc->targetcmds[i].cmd_valid = 0;
4966                 ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD);
4967                 ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256];
4968         }
4969         ahc->qinfifo = &ahc->qoutfifo[256];
4970
4971         ahc->init_level++;
4972
4973         /* Allocate SCB data now that buffer_dmat is initialized */
4974         if (ahc->scb_data->maxhscbs == 0)
4975                 if (ahc_init_scbdata(ahc) != 0)
4976                         return (ENOMEM);
4977
4978         /*
4979          * Allocate a tstate to house information for our
4980          * initiator presence on the bus as well as the user
4981          * data for any target mode initiator.
4982          */
4983         if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) {
4984                 printf("%s: unable to allocate ahc_tmode_tstate.  "
4985                        "Failing attach\n", ahc_name(ahc));
4986                 return (ENOMEM);
4987         }
4988
4989         if ((ahc->features & AHC_TWIN) != 0) {
4990                 if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) {
4991                         printf("%s: unable to allocate ahc_tmode_tstate.  "
4992                                "Failing attach\n", ahc_name(ahc));
4993                         return (ENOMEM);
4994                 }
4995         }
4996
4997         /*
4998          * Fire up a recovery thread for this controller.
4999          */
5000         error = ahc_spawn_recovery_thread(ahc);
5001         if (error != 0)
5002                 return (error);
5003
5004         if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) {
5005                 ahc->flags |= AHC_PAGESCBS;
5006         } else {
5007                 ahc->flags &= ~AHC_PAGESCBS;
5008         }
5009
5010 #ifdef AHC_DEBUG
5011         if (ahc_debug & AHC_SHOW_MISC) {
5012                 printf("%s: hardware scb %u bytes; kernel scb %u bytes; "
5013                        "ahc_dma %u bytes\n",
5014                         ahc_name(ahc),
5015                         (u_int)sizeof(struct hardware_scb),
5016                         (u_int)sizeof(struct scb),
5017                         (u_int)sizeof(struct ahc_dma_seg));
5018         }
5019 #endif /* AHC_DEBUG */
5020
5021         /*
5022          * Look at the information that board initialization or
5023          * the board bios has left us.
5024          */
5025         if (ahc->features & AHC_TWIN) {
5026                 scsi_conf = ahc_inb(ahc, SCSICONF + 1);
5027                 if ((scsi_conf & RESET_SCSI) != 0
5028                  && (ahc->flags & AHC_INITIATORROLE) != 0)
5029                         ahc->flags |= AHC_RESET_BUS_B;
5030         }
5031
5032         scsi_conf = ahc_inb(ahc, SCSICONF);
5033         if ((scsi_conf & RESET_SCSI) != 0
5034          && (ahc->flags & AHC_INITIATORROLE) != 0)
5035                 ahc->flags |= AHC_RESET_BUS_A;
5036
5037         ultraenb = 0;
5038         tagenable = ALL_TARGETS_MASK;
5039
5040         /* Grab the disconnection disable table and invert it for our needs */
5041         if ((ahc->flags & AHC_USEDEFAULTS) != 0) {
5042                 printf("%s: Host Adapter Bios disabled.  Using default SCSI "
5043                         "device parameters\n", ahc_name(ahc));
5044                 ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B|
5045                               AHC_TERM_ENB_A|AHC_TERM_ENB_B;
5046                 discenable = ALL_TARGETS_MASK;
5047                 if ((ahc->features & AHC_ULTRA) != 0)
5048                         ultraenb = ALL_TARGETS_MASK;
5049         } else {
5050                 discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8)
5051                            | ahc_inb(ahc, DISC_DSB));
5052                 if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0)
5053                         ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8)
5054                                       | ahc_inb(ahc, ULTRA_ENB);
5055         }
5056
5057         if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
5058                 max_targ = 7;
5059
5060         for (i = 0; i <= max_targ; i++) {
5061                 struct ahc_initiator_tinfo *tinfo;
5062                 struct ahc_tmode_tstate *tstate;
5063                 u_int our_id;
5064                 u_int target_id;
5065                 char channel;
5066
5067                 channel = 'A';
5068                 our_id = ahc->our_id;
5069                 target_id = i;
5070                 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
5071                         channel = 'B';
5072                         our_id = ahc->our_id_b;
5073                         target_id = i % 8;
5074                 }
5075                 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
5076                                             target_id, &tstate);
5077                 /* Default to async narrow across the board */
5078                 memset(tinfo, 0, sizeof(*tinfo));
5079                 if (ahc->flags & AHC_USEDEFAULTS) {
5080                         if ((ahc->features & AHC_WIDE) != 0)
5081                                 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
5082
5083                         /*
5084                          * These will be truncated when we determine the
5085                          * connection type we have with the target.
5086                          */
5087                         tinfo->user.period = ahc_syncrates->period;
5088                         tinfo->user.offset = MAX_OFFSET;
5089                 } else {
5090                         u_int scsirate;
5091                         uint16_t mask;
5092
5093                         /* Take the settings leftover in scratch RAM. */
5094                         scsirate = ahc_inb(ahc, TARG_SCSIRATE + i);
5095                         mask = (0x01 << i);
5096                         if ((ahc->features & AHC_ULTRA2) != 0) {
5097                                 u_int offset;
5098                                 u_int maxsync;
5099
5100                                 if ((scsirate & SOFS) == 0x0F) {
5101                                         /*
5102                                          * Haven't negotiated yet,
5103                                          * so the format is different.
5104                                          */
5105                                         scsirate = (scsirate & SXFR) >> 4
5106                                                  | (ultraenb & mask)
5107                                                   ? 0x08 : 0x0
5108                                                  | (scsirate & WIDEXFER);
5109                                         offset = MAX_OFFSET_ULTRA2;
5110                                 } else
5111                                         offset = ahc_inb(ahc, TARG_OFFSET + i);
5112                                 if ((scsirate & ~WIDEXFER) == 0 && offset != 0)
5113                                         /* Set to the lowest sync rate, 5MHz */
5114                                         scsirate |= 0x1c;
5115                                 maxsync = AHC_SYNCRATE_ULTRA2;
5116                                 if ((ahc->features & AHC_DT) != 0)
5117                                         maxsync = AHC_SYNCRATE_DT;
5118                                 tinfo->user.period =
5119                                     ahc_find_period(ahc, scsirate, maxsync);
5120                                 if (offset == 0)
5121                                         tinfo->user.period = 0;
5122                                 else
5123                                         tinfo->user.offset = MAX_OFFSET;
5124                                 if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/
5125                                  && (ahc->features & AHC_DT) != 0)
5126                                         tinfo->user.ppr_options =
5127                                             MSG_EXT_PPR_DT_REQ;
5128                         } else if ((scsirate & SOFS) != 0) {
5129                                 if ((scsirate & SXFR) == 0x40
5130                                  && (ultraenb & mask) != 0) {
5131                                         /* Treat 10MHz as a non-ultra speed */
5132                                         scsirate &= ~SXFR;
5133                                         ultraenb &= ~mask;
5134                                 }
5135                                 tinfo->user.period =
5136                                     ahc_find_period(ahc, scsirate,
5137                                                     (ultraenb & mask)
5138                                                    ? AHC_SYNCRATE_ULTRA
5139                                                    : AHC_SYNCRATE_FAST);
5140                                 if (tinfo->user.period != 0)
5141                                         tinfo->user.offset = MAX_OFFSET;
5142                         }
5143                         if (tinfo->user.period == 0)
5144                                 tinfo->user.offset = 0;
5145                         if ((scsirate & WIDEXFER) != 0
5146                          && (ahc->features & AHC_WIDE) != 0)
5147                                 tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT;
5148                         tinfo->user.protocol_version = 4;
5149                         if ((ahc->features & AHC_DT) != 0)
5150                                 tinfo->user.transport_version = 3;
5151                         else
5152                                 tinfo->user.transport_version = 2;
5153                         tinfo->goal.protocol_version = 2;
5154                         tinfo->goal.transport_version = 2;
5155                         tinfo->curr.protocol_version = 2;
5156                         tinfo->curr.transport_version = 2;
5157                 }
5158                 tstate->ultraenb = 0;
5159         }
5160         ahc->user_discenable = discenable;
5161         ahc->user_tagenable = tagenable;
5162
5163         return (ahc->bus_chip_init(ahc));
5164 }
5165
5166 void
5167 ahc_intr_enable(struct ahc_softc *ahc, int enable)
5168 {
5169         u_int hcntrl;
5170
5171         hcntrl = ahc_inb(ahc, HCNTRL);
5172         hcntrl &= ~INTEN;
5173         ahc->pause &= ~INTEN;
5174         ahc->unpause &= ~INTEN;
5175         if (enable) {
5176                 hcntrl |= INTEN;
5177                 ahc->pause |= INTEN;
5178                 ahc->unpause |= INTEN;
5179         }
5180         ahc_outb(ahc, HCNTRL, hcntrl);
5181 }
5182
5183 /*
5184  * Ensure that the card is paused in a location
5185  * outside of all critical sections and that all
5186  * pending work is completed prior to returning.
5187  * This routine should only be called from outside
5188  * an interrupt context.
5189  */
5190 void
5191 ahc_pause_and_flushwork(struct ahc_softc *ahc)
5192 {
5193         int intstat;
5194         int maxloops;
5195         int paused;
5196
5197         maxloops = 1000;
5198         ahc->flags |= AHC_ALL_INTERRUPTS;
5199         paused = FALSE;
5200         do {
5201                 if (paused) {
5202                         ahc_unpause(ahc);
5203                         /*
5204                          * Give the sequencer some time to service
5205                          * any active selections.
5206                          */
5207                         aic_delay(500);
5208                 }
5209                 ahc_intr(ahc);
5210                 ahc_pause(ahc);
5211                 paused = TRUE;
5212                 ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO);
5213                 intstat = ahc_inb(ahc, INTSTAT);
5214                 if ((intstat & INT_PEND) == 0) {
5215                         ahc_clear_critical_section(ahc);
5216                         intstat = ahc_inb(ahc, INTSTAT);
5217                 }
5218         } while (--maxloops
5219               && (intstat != 0xFF || (ahc->features & AHC_REMOVABLE) == 0)
5220               && ((intstat & INT_PEND) != 0
5221                || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)) != 0));
5222         if (maxloops == 0) {
5223                 printf("Infinite interrupt loop, INTSTAT = %x",
5224                        ahc_inb(ahc, INTSTAT));
5225         }
5226         ahc_platform_flushwork(ahc);
5227         ahc->flags &= ~AHC_ALL_INTERRUPTS;
5228 }
5229
5230 int
5231 ahc_suspend(struct ahc_softc *ahc)
5232 {
5233
5234         ahc_pause_and_flushwork(ahc);
5235
5236         if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
5237                 ahc_unpause(ahc);
5238                 return (EBUSY);
5239         }
5240
5241 #ifdef AHC_TARGET_MODE
5242         /*
5243          * XXX What about ATIOs that have not yet been serviced?
5244          * Perhaps we should just refuse to be suspended if we
5245          * are acting in a target role.
5246          */
5247         if (ahc->pending_device != NULL) {
5248                 ahc_unpause(ahc);
5249                 return (EBUSY);
5250         }
5251 #endif
5252         ahc_shutdown(ahc);
5253         return (0);
5254 }
5255
5256 int
5257 ahc_resume(struct ahc_softc *ahc)
5258 {
5259
5260         ahc_reset(ahc, /*reinit*/TRUE);
5261         ahc_intr_enable(ahc, TRUE);
5262         ahc_restart(ahc);
5263         return (0);
5264 }
5265
5266 /************************** Busy Target Table *********************************/
5267 /*
5268  * Return the untagged transaction id for a given target/channel lun.
5269  * Optionally, clear the entry.
5270  */
5271 u_int
5272 ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl)
5273 {
5274         u_int scbid;
5275         u_int target_offset;
5276
5277         if ((ahc->flags & AHC_SCB_BTT) != 0) {
5278                 u_int saved_scbptr;
5279
5280                 saved_scbptr = ahc_inb(ahc, SCBPTR);
5281                 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5282                 scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl));
5283                 ahc_outb(ahc, SCBPTR, saved_scbptr);
5284         } else {
5285                 target_offset = TCL_TARGET_OFFSET(tcl);
5286                 scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset);
5287         }
5288
5289         return (scbid);
5290 }
5291
5292 void
5293 ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl)
5294 {
5295         u_int target_offset;
5296
5297         if ((ahc->flags & AHC_SCB_BTT) != 0) {
5298                 u_int saved_scbptr;
5299
5300                 saved_scbptr = ahc_inb(ahc, SCBPTR);
5301                 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5302                 ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL);
5303                 ahc_outb(ahc, SCBPTR, saved_scbptr);
5304         } else {
5305                 target_offset = TCL_TARGET_OFFSET(tcl);
5306                 ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL);
5307         }
5308 }
5309
5310 void
5311 ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid)
5312 {
5313         u_int target_offset;
5314
5315         if ((ahc->flags & AHC_SCB_BTT) != 0) {
5316                 u_int saved_scbptr;
5317
5318                 saved_scbptr = ahc_inb(ahc, SCBPTR);
5319                 ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
5320                 ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid);
5321                 ahc_outb(ahc, SCBPTR, saved_scbptr);
5322         } else {
5323                 target_offset = TCL_TARGET_OFFSET(tcl);
5324                 ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid);
5325         }
5326 }
5327
5328 /************************** SCB and SCB queue management **********************/
5329 int
5330 ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target,
5331               char channel, int lun, u_int tag, role_t role)
5332 {
5333         int targ = SCB_GET_TARGET(ahc, scb);
5334         char chan = SCB_GET_CHANNEL(ahc, scb);
5335         int slun = SCB_GET_LUN(scb);
5336         int match;
5337
5338         match = ((chan == channel) || (channel == ALL_CHANNELS));
5339         if (match != 0)
5340                 match = ((targ == target) || (target == CAM_TARGET_WILDCARD));
5341         if (match != 0)
5342                 match = ((lun == slun) || (lun == CAM_LUN_WILDCARD));
5343         if (match != 0) {
5344 #ifdef AHC_TARGET_MODE
5345                 int group;
5346
5347                 group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code);
5348                 if (role == ROLE_INITIATOR) {
5349                         match = (group != XPT_FC_GROUP_TMODE)
5350                               && ((tag == scb->hscb->tag)
5351                                || (tag == SCB_LIST_NULL));
5352                 } else if (role == ROLE_TARGET) {
5353                         match = (group == XPT_FC_GROUP_TMODE)
5354                               && ((tag == scb->io_ctx->csio.tag_id)
5355                                || (tag == SCB_LIST_NULL));
5356                 }
5357 #else /* !AHC_TARGET_MODE */
5358                 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
5359 #endif /* AHC_TARGET_MODE */
5360         }
5361
5362         return match;
5363 }
5364
5365 void
5366 ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
5367 {
5368         int     target;
5369         char    channel;
5370         int     lun;
5371
5372         target = SCB_GET_TARGET(ahc, scb);
5373         lun = SCB_GET_LUN(scb);
5374         channel = SCB_GET_CHANNEL(ahc, scb);
5375
5376         ahc_search_qinfifo(ahc, target, channel, lun,
5377                            /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN,
5378                            CAM_REQUEUE_REQ, SEARCH_COMPLETE);
5379
5380         ahc_platform_freeze_devq(ahc, scb);
5381 }
5382
5383 void
5384 ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb)
5385 {
5386         struct scb *prev_scb;
5387
5388         prev_scb = NULL;
5389         if (ahc_qinfifo_count(ahc) != 0) {
5390                 u_int prev_tag;
5391                 uint8_t prev_pos;
5392
5393                 prev_pos = ahc->qinfifonext - 1;
5394                 prev_tag = ahc->qinfifo[prev_pos];
5395                 prev_scb = ahc_lookup_scb(ahc, prev_tag);
5396         }
5397         ahc_qinfifo_requeue(ahc, prev_scb, scb);
5398         if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5399                 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5400         } else {
5401                 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5402         }
5403 }
5404
5405 static void
5406 ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb,
5407                     struct scb *scb)
5408 {
5409         if (prev_scb == NULL) {
5410                 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5411         } else {
5412                 prev_scb->hscb->next = scb->hscb->tag;
5413                 ahc_sync_scb(ahc, prev_scb,
5414                              BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5415         }
5416         ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
5417         scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5418         ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
5419 }
5420
5421 static int
5422 ahc_qinfifo_count(struct ahc_softc *ahc)
5423 {
5424         uint8_t qinpos;
5425         uint8_t diff;
5426
5427         if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5428                 qinpos = ahc_inb(ahc, SNSCB_QOFF);
5429                 ahc_outb(ahc, SNSCB_QOFF, qinpos);
5430         } else
5431                 qinpos = ahc_inb(ahc, QINPOS);
5432         diff = ahc->qinfifonext - qinpos;
5433         return (diff);
5434 }
5435
5436 int
5437 ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
5438                    int lun, u_int tag, role_t role, uint32_t status,
5439                    ahc_search_action action)
5440 {
5441         struct  scb *scb;
5442         struct  scb *prev_scb;
5443         uint8_t qinstart;
5444         uint8_t qinpos;
5445         uint8_t qintail;
5446         uint8_t next;
5447         uint8_t prev;
5448         uint8_t curscbptr;
5449         int     found;
5450         int     have_qregs;
5451
5452         qintail = ahc->qinfifonext;
5453         have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0;
5454         if (have_qregs) {
5455                 qinstart = ahc_inb(ahc, SNSCB_QOFF);
5456                 ahc_outb(ahc, SNSCB_QOFF, qinstart);
5457         } else
5458                 qinstart = ahc_inb(ahc, QINPOS);
5459         qinpos = qinstart;
5460         found = 0;
5461         prev_scb = NULL;
5462
5463         if (action == SEARCH_COMPLETE) {
5464                 /*
5465                  * Don't attempt to run any queued untagged transactions
5466                  * until we are done with the abort process.
5467                  */
5468                 ahc_freeze_untagged_queues(ahc);
5469         }
5470
5471         /*
5472          * Start with an empty queue.  Entries that are not chosen
5473          * for removal will be re-added to the queue as we go.
5474          */
5475         ahc->qinfifonext = qinpos;
5476         ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
5477
5478         while (qinpos != qintail) {
5479                 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]);
5480                 if (scb == NULL) {
5481                         printf("qinpos = %d, SCB index = %d\n",
5482                                 qinpos, ahc->qinfifo[qinpos]);
5483                         panic("Loop 1\n");
5484                 }
5485
5486                 if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) {
5487                         /*
5488                          * We found an scb that needs to be acted on.
5489                          */
5490                         found++;
5491                         switch (action) {
5492                         case SEARCH_COMPLETE:
5493                         {
5494                                 cam_status ostat;
5495                                 cam_status cstat;
5496
5497                                 ostat = aic_get_transaction_status(scb);
5498                                 if (ostat == CAM_REQ_INPROG)
5499                                         aic_set_transaction_status(scb, status);
5500                                 cstat = aic_get_transaction_status(scb);
5501                                 if (cstat != CAM_REQ_CMP)
5502                                         aic_freeze_scb(scb);
5503                                 if ((scb->flags & SCB_ACTIVE) == 0)
5504                                         printf("Inactive SCB in qinfifo\n");
5505                                 ahc_done(ahc, scb);
5506
5507                                 /* FALLTHROUGH */
5508                         }
5509                         case SEARCH_REMOVE:
5510                                 break;
5511                         case SEARCH_COUNT:
5512                                 ahc_qinfifo_requeue(ahc, prev_scb, scb);
5513                                 prev_scb = scb;
5514                                 break;
5515                         }
5516                 } else {
5517                         ahc_qinfifo_requeue(ahc, prev_scb, scb);
5518                         prev_scb = scb;
5519                 }
5520                 qinpos++;
5521         }
5522
5523         if ((ahc->features & AHC_QUEUE_REGS) != 0) {
5524                 ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
5525         } else {
5526                 ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
5527         }
5528
5529         if (action != SEARCH_COUNT
5530          && (found != 0)
5531          && (qinstart != ahc->qinfifonext)) {
5532                 /*
5533                  * The sequencer may be in the process of dmaing
5534                  * down the SCB at the beginning of the queue.
5535                  * This could be problematic if either the first,
5536                  * or the second SCB is removed from the queue
5537                  * (the first SCB includes a pointer to the "next"
5538                  * SCB to dma). If we have removed any entries, swap
5539                  * the first element in the queue with the next HSCB
5540                  * so the sequencer will notice that NEXT_QUEUED_SCB
5541                  * has changed during its dma attempt and will retry
5542                  * the DMA.
5543                  */
5544                 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]);
5545
5546                 if (scb == NULL) {
5547                         printf("found = %d, qinstart = %d, qinfifionext = %d\n",
5548                                 found, qinstart, ahc->qinfifonext);
5549                         panic("First/Second Qinfifo fixup\n");
5550                 }
5551                 /*
5552                  * ahc_swap_with_next_hscb forces our next pointer to
5553                  * point to the reserved SCB for future commands.  Save
5554                  * and restore our original next pointer to maintain
5555                  * queue integrity.
5556                  */
5557                 next = scb->hscb->next;
5558                 ahc->scb_data->scbindex[scb->hscb->tag] = NULL;
5559                 ahc_swap_with_next_hscb(ahc, scb);
5560                 scb->hscb->next = next;
5561                 ahc->qinfifo[qinstart] = scb->hscb->tag;
5562
5563                 /* Tell the card about the new head of the qinfifo. */
5564                 ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
5565
5566                 /* Fixup the tail "next" pointer. */
5567                 qintail = ahc->qinfifonext - 1;
5568                 scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]);
5569                 scb->hscb->next = ahc->next_queued_scb->hscb->tag;
5570         }
5571
5572         /*
5573          * Search waiting for selection list.
5574          */
5575         curscbptr = ahc_inb(ahc, SCBPTR);
5576         next = ahc_inb(ahc, WAITING_SCBH);  /* Start at head of list. */
5577         prev = SCB_LIST_NULL;
5578
5579         while (next != SCB_LIST_NULL) {
5580                 uint8_t scb_index;
5581
5582                 ahc_outb(ahc, SCBPTR, next);
5583                 scb_index = ahc_inb(ahc, SCB_TAG);
5584                 if (scb_index >= ahc->scb_data->numscbs) {
5585                         printf("Waiting List inconsistency. "
5586                                "SCB index == %d, yet numscbs == %d.",
5587                                scb_index, ahc->scb_data->numscbs);
5588                         ahc_dump_card_state(ahc);
5589                         panic("for safety");
5590                 }
5591                 scb = ahc_lookup_scb(ahc, scb_index);
5592                 if (scb == NULL) {
5593                         printf("scb_index = %d, next = %d\n",
5594                                 scb_index, next);
5595                         panic("Waiting List traversal\n");
5596                 }
5597                 if (ahc_match_scb(ahc, scb, target, channel,
5598                                   lun, SCB_LIST_NULL, role)) {
5599                         /*
5600                          * We found an scb that needs to be acted on.
5601                          */
5602                         found++;
5603                         switch (action) {
5604                         case SEARCH_COMPLETE:
5605                         {
5606                                 cam_status ostat;
5607                                 cam_status cstat;
5608
5609                                 ostat = aic_get_transaction_status(scb);
5610                                 if (ostat == CAM_REQ_INPROG)
5611                                         aic_set_transaction_status(scb,
5612                                                                    status);
5613                                 cstat = aic_get_transaction_status(scb);
5614                                 if (cstat != CAM_REQ_CMP)
5615                                         aic_freeze_scb(scb);
5616                                 if ((scb->flags & SCB_ACTIVE) == 0)
5617                                         printf("Inactive SCB in Wait List\n");
5618                                 ahc_done(ahc, scb);
5619                                 /* FALLTHROUGH */
5620                         }
5621                         case SEARCH_REMOVE:
5622                                 next = ahc_rem_wscb(ahc, next, prev);
5623                                 break;
5624                         case SEARCH_COUNT:
5625                                 prev = next;
5626                                 next = ahc_inb(ahc, SCB_NEXT);
5627                                 break;
5628                         }
5629                 } else {
5630
5631                         prev = next;
5632                         next = ahc_inb(ahc, SCB_NEXT);
5633                 }
5634         }
5635         ahc_outb(ahc, SCBPTR, curscbptr);
5636
5637         found += ahc_search_untagged_queues(ahc, /*aic_io_ctx_t*/NULL, target,
5638                                             channel, lun, status, action);
5639
5640         if (action == SEARCH_COMPLETE)
5641                 ahc_release_untagged_queues(ahc);
5642         return (found);
5643 }
5644
5645 int
5646 ahc_search_untagged_queues(struct ahc_softc *ahc, aic_io_ctx_t ctx,
5647                            int target, char channel, int lun, uint32_t status,
5648                            ahc_search_action action)
5649 {
5650         struct  scb *scb;
5651         int     maxtarget;
5652         int     found;
5653         int     i;
5654
5655         if (action == SEARCH_COMPLETE) {
5656                 /*
5657                  * Don't attempt to run any queued untagged transactions
5658                  * until we are done with the abort process.
5659                  */
5660                 ahc_freeze_untagged_queues(ahc);
5661         }
5662
5663         found = 0;
5664         i = 0;
5665         if ((ahc->flags & AHC_SCB_BTT) == 0) {
5666
5667                 maxtarget = 16;
5668                 if (target != CAM_TARGET_WILDCARD) {
5669
5670                         i = target;
5671                         if (channel == 'B')
5672                                 i += 8;
5673                         maxtarget = i + 1;
5674                 }
5675         } else {
5676                 maxtarget = 0;
5677         }
5678
5679         for (; i < maxtarget; i++) {
5680                 struct scb_tailq *untagged_q;
5681                 struct scb *next_scb;
5682
5683                 untagged_q = &(ahc->untagged_queues[i]);
5684                 next_scb = TAILQ_FIRST(untagged_q);
5685                 while (next_scb != NULL) {
5686
5687                         scb = next_scb;
5688                         next_scb = TAILQ_NEXT(scb, links.tqe);
5689
5690                         /*
5691                          * The head of the list may be the currently
5692                          * active untagged command for a device.
5693                          * We're only searching for commands that
5694                          * have not been started.  A transaction
5695                          * marked active but still in the qinfifo
5696                          * is removed by the qinfifo scanning code
5697                          * above.
5698                          */
5699                         if ((scb->flags & SCB_ACTIVE) != 0)
5700                                 continue;
5701
5702                         if (ahc_match_scb(ahc, scb, target, channel, lun,
5703                                           SCB_LIST_NULL, ROLE_INITIATOR) == 0
5704                          || (ctx != NULL && ctx != scb->io_ctx))
5705                                 continue;
5706
5707                         /*
5708                          * We found an scb that needs to be acted on.
5709                          */
5710                         found++;
5711                         switch (action) {
5712                         case SEARCH_COMPLETE:
5713                         {
5714                                 cam_status ostat;
5715                                 cam_status cstat;
5716
5717                                 ostat = aic_get_transaction_status(scb);
5718                                 if (ostat == CAM_REQ_INPROG)
5719                                         aic_set_transaction_status(scb, status);
5720                                 cstat = aic_get_transaction_status(scb);
5721                                 if (cstat != CAM_REQ_CMP)
5722                                         aic_freeze_scb(scb);
5723                                 ahc_done(ahc, scb);
5724                                 break;
5725                         }
5726                         case SEARCH_REMOVE:
5727                                 scb->flags &= ~SCB_UNTAGGEDQ;
5728                                 TAILQ_REMOVE(untagged_q, scb, links.tqe);
5729                                 break;
5730                         case SEARCH_COUNT:
5731                                 break;
5732                         }
5733                 }
5734         }
5735
5736         if (action == SEARCH_COMPLETE)
5737                 ahc_release_untagged_queues(ahc);
5738         return (found);
5739 }
5740
5741 int
5742 ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel,
5743                      int lun, u_int tag, int stop_on_first, int remove,
5744                      int save_state)
5745 {
5746         struct  scb *scbp;
5747         u_int   next;
5748         u_int   prev;
5749         u_int   count;
5750         u_int   active_scb;
5751
5752         count = 0;
5753         next = ahc_inb(ahc, DISCONNECTED_SCBH);
5754         prev = SCB_LIST_NULL;
5755
5756         if (save_state) {
5757                 /* restore this when we're done */
5758                 active_scb = ahc_inb(ahc, SCBPTR);
5759         } else
5760                 /* Silence compiler */
5761                 active_scb = SCB_LIST_NULL;
5762
5763         while (next != SCB_LIST_NULL) {
5764                 u_int scb_index;
5765
5766                 ahc_outb(ahc, SCBPTR, next);
5767                 scb_index = ahc_inb(ahc, SCB_TAG);
5768                 if (scb_index >= ahc->scb_data->numscbs) {
5769                         printf("Disconnected List inconsistency. "
5770                                "SCB index == %d, yet numscbs == %d.",
5771                                scb_index, ahc->scb_data->numscbs);
5772                         ahc_dump_card_state(ahc);
5773                         panic("for safety");
5774                 }
5775
5776                 if (next == prev) {
5777                         panic("Disconnected List Loop. "
5778                               "cur SCBPTR == %x, prev SCBPTR == %x.",
5779                               next, prev);
5780                 }
5781                 scbp = ahc_lookup_scb(ahc, scb_index);
5782                 if (ahc_match_scb(ahc, scbp, target, channel, lun,
5783                                   tag, ROLE_INITIATOR)) {
5784                         count++;
5785                         if (remove) {
5786                                 next =
5787                                     ahc_rem_scb_from_disc_list(ahc, prev, next);
5788                         } else {
5789                                 prev = next;
5790                                 next = ahc_inb(ahc, SCB_NEXT);
5791                         }
5792                         if (stop_on_first)
5793                                 break;
5794                 } else {
5795                         prev = next;
5796                         next = ahc_inb(ahc, SCB_NEXT);
5797                 }
5798         }
5799         if (save_state)
5800                 ahc_outb(ahc, SCBPTR, active_scb);
5801         return (count);
5802 }
5803
5804 /*
5805  * Remove an SCB from the on chip list of disconnected transactions.
5806  * This is empty/unused if we are not performing SCB paging.
5807  */
5808 static u_int
5809 ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr)
5810 {
5811         u_int next;
5812
5813         ahc_outb(ahc, SCBPTR, scbptr);
5814         next = ahc_inb(ahc, SCB_NEXT);
5815
5816         ahc_outb(ahc, SCB_CONTROL, 0);
5817
5818         ahc_add_curscb_to_free_list(ahc);
5819
5820         if (prev != SCB_LIST_NULL) {
5821                 ahc_outb(ahc, SCBPTR, prev);
5822                 ahc_outb(ahc, SCB_NEXT, next);
5823         } else
5824                 ahc_outb(ahc, DISCONNECTED_SCBH, next);
5825
5826         return (next);
5827 }
5828
5829 /*
5830  * Add the SCB as selected by SCBPTR onto the on chip list of
5831  * free hardware SCBs.  This list is empty/unused if we are not
5832  * performing SCB paging.
5833  */
5834 static void
5835 ahc_add_curscb_to_free_list(struct ahc_softc *ahc)
5836 {
5837         /*
5838          * Invalidate the tag so that our abort
5839          * routines don't think it's active.
5840          */
5841         ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
5842
5843         if ((ahc->flags & AHC_PAGESCBS) != 0) {
5844                 ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH));
5845                 ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR));
5846         }
5847 }
5848
5849 /*
5850  * Manipulate the waiting for selection list and return the
5851  * scb that follows the one that we remove.
5852  */
5853 static u_int
5854 ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev)
5855 {
5856         u_int curscb, next;
5857
5858         /*
5859          * Select the SCB we want to abort and
5860          * pull the next pointer out of it.
5861          */
5862         curscb = ahc_inb(ahc, SCBPTR);
5863         ahc_outb(ahc, SCBPTR, scbpos);
5864         next = ahc_inb(ahc, SCB_NEXT);
5865
5866         /* Clear the necessary fields */
5867         ahc_outb(ahc, SCB_CONTROL, 0);
5868
5869         ahc_add_curscb_to_free_list(ahc);
5870
5871         /* update the waiting list */
5872         if (prev == SCB_LIST_NULL) {
5873                 /* First in the list */
5874                 ahc_outb(ahc, WAITING_SCBH, next);
5875
5876                 /*
5877                  * Ensure we aren't attempting to perform
5878                  * selection for this entry.
5879                  */
5880                 ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
5881         } else {
5882                 /*
5883                  * Select the scb that pointed to us
5884                  * and update its next pointer.
5885                  */
5886                 ahc_outb(ahc, SCBPTR, prev);
5887                 ahc_outb(ahc, SCB_NEXT, next);
5888         }
5889
5890         /*
5891          * Point us back at the original scb position.
5892          */
5893         ahc_outb(ahc, SCBPTR, curscb);
5894         return next;
5895 }
5896
5897 /******************************** Error Handling ******************************/
5898 /*
5899  * Abort all SCBs that match the given description (target/channel/lun/tag),
5900  * setting their status to the passed in status if the status has not already
5901  * been modified from CAM_REQ_INPROG.  This routine assumes that the sequencer
5902  * is paused before it is called.
5903  */
5904 int
5905 ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel,
5906                int lun, u_int tag, role_t role, uint32_t status)
5907 {
5908         struct  scb *scbp;
5909         struct  scb *scbp_next;
5910         u_int   active_scb;
5911         int     i, j;
5912         int     maxtarget;
5913         int     minlun;
5914         int     maxlun;
5915
5916         int     found;
5917
5918         /*
5919          * Don't attempt to run any queued untagged transactions
5920          * until we are done with the abort process.
5921          */
5922         ahc_freeze_untagged_queues(ahc);
5923
5924         /* restore this when we're done */
5925         active_scb = ahc_inb(ahc, SCBPTR);
5926
5927         found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL,
5928                                    role, CAM_REQUEUE_REQ, SEARCH_COMPLETE);
5929
5930         /*
5931          * Clean out the busy target table for any untagged commands.
5932          */
5933         i = 0;
5934         maxtarget = 16;
5935         if (target != CAM_TARGET_WILDCARD) {
5936                 i = target;
5937                 if (channel == 'B')
5938                         i += 8;
5939                 maxtarget = i + 1;
5940         }
5941
5942         if (lun == CAM_LUN_WILDCARD) {
5943
5944                 /*
5945                  * Unless we are using an SCB based
5946                  * busy targets table, there is only
5947                  * one table entry for all luns of
5948                  * a target.
5949                  */
5950                 minlun = 0;
5951                 maxlun = 1;
5952                 if ((ahc->flags & AHC_SCB_BTT) != 0)
5953                         maxlun = AHC_NUM_LUNS;
5954         } else {
5955                 minlun = lun;
5956                 maxlun = lun + 1;
5957         }
5958
5959         if (role != ROLE_TARGET) {
5960                 for (;i < maxtarget; i++) {
5961                         for (j = minlun;j < maxlun; j++) {
5962                                 u_int scbid;
5963                                 u_int tcl;
5964
5965                                 tcl = BUILD_TCL(i << 4, j);
5966                                 scbid = ahc_index_busy_tcl(ahc, tcl);
5967                                 scbp = ahc_lookup_scb(ahc, scbid);
5968                                 if (scbp == NULL
5969                                  || ahc_match_scb(ahc, scbp, target, channel,
5970                                                   lun, tag, role) == 0)
5971                                         continue;
5972                                 ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j));
5973                         }
5974                 }
5975
5976                 /*
5977                  * Go through the disconnected list and remove any entries we
5978                  * have queued for completion, 0'ing their control byte too.
5979                  * We save the active SCB and restore it ourselves, so there
5980                  * is no reason for this search to restore it too.
5981                  */
5982                 ahc_search_disc_list(ahc, target, channel, lun, tag,
5983                                      /*stop_on_first*/FALSE, /*remove*/TRUE,
5984                                      /*save_state*/FALSE);
5985         }
5986
5987         /*
5988          * Go through the hardware SCB array looking for commands that
5989          * were active but not on any list.  In some cases, these remnants
5990          * might not still have mappings in the scbindex array (e.g. unexpected
5991          * bus free with the same scb queued for an abort).  Don't hold this
5992          * against them.
5993          */
5994         for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
5995                 u_int scbid;
5996
5997                 ahc_outb(ahc, SCBPTR, i);
5998                 scbid = ahc_inb(ahc, SCB_TAG);
5999                 scbp = ahc_lookup_scb(ahc, scbid);
6000                 if ((scbp == NULL && scbid != SCB_LIST_NULL)
6001                  || (scbp != NULL
6002                   && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)))
6003                         ahc_add_curscb_to_free_list(ahc);
6004         }
6005
6006         /*
6007          * Go through the pending CCB list and look for
6008          * commands for this target that are still active.
6009          * These are other tagged commands that were
6010          * disconnected when the reset occurred.
6011          */
6012         scbp_next = LIST_FIRST(&ahc->pending_scbs);
6013         while (scbp_next != NULL) {
6014                 scbp = scbp_next;
6015                 scbp_next = LIST_NEXT(scbp, pending_links);
6016                 if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) {
6017                         cam_status ostat;
6018
6019                         ostat = aic_get_transaction_status(scbp);
6020                         if (ostat == CAM_REQ_INPROG)
6021                                 aic_set_transaction_status(scbp, status);
6022                         if (aic_get_transaction_status(scbp) != CAM_REQ_CMP)
6023                                 aic_freeze_scb(scbp);
6024                         if ((scbp->flags & SCB_ACTIVE) == 0)
6025                                 printf("Inactive SCB on pending list\n");
6026                         ahc_done(ahc, scbp);
6027                         found++;
6028                 }
6029         }
6030         ahc_outb(ahc, SCBPTR, active_scb);
6031         ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status);
6032         ahc_release_untagged_queues(ahc);
6033         return found;
6034 }
6035
6036 static void
6037 ahc_reset_current_bus(struct ahc_softc *ahc)
6038 {
6039         uint8_t scsiseq;
6040
6041         ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST);
6042         scsiseq = ahc_inb(ahc, SCSISEQ);
6043         ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO);
6044         ahc_flush_device_writes(ahc);
6045         aic_delay(AHC_BUSRESET_DELAY);
6046         /* Turn off the bus reset */
6047         ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO);
6048
6049         ahc_clear_intstat(ahc);
6050
6051         /* Re-enable reset interrupts */
6052         ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST);
6053 }
6054
6055 int
6056 ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset)
6057 {
6058         struct  ahc_devinfo devinfo;
6059         u_int   initiator, target, max_scsiid;
6060         u_int   sblkctl;
6061         u_int   scsiseq;
6062         u_int   simode1;
6063         int     found;
6064         int     restart_needed;
6065         char    cur_channel;
6066
6067         ahc->pending_device = NULL;
6068
6069         ahc_compile_devinfo(&devinfo,
6070                             CAM_TARGET_WILDCARD,
6071                             CAM_TARGET_WILDCARD,
6072                             CAM_LUN_WILDCARD,
6073                             channel, ROLE_UNKNOWN);
6074         ahc_pause(ahc);
6075
6076         /* Make sure the sequencer is in a safe location. */
6077         ahc_clear_critical_section(ahc);
6078
6079         /*
6080          * Run our command complete fifos to ensure that we perform
6081          * completion processing on any commands that 'completed'
6082          * before the reset occurred.
6083          */
6084         ahc_run_qoutfifo(ahc);
6085 #ifdef AHC_TARGET_MODE
6086         /*
6087          * XXX - In Twin mode, the tqinfifo may have commands
6088          *       for an unaffected channel in it.  However, if
6089          *       we have run out of ATIO resources to drain that
6090          *       queue, we may not get them all out here.  Further,
6091          *       the blocked transactions for the reset channel
6092          *       should just be killed off, irrespecitve of whether
6093          *       we are blocked on ATIO resources.  Write a routine
6094          *       to compact the tqinfifo appropriately.
6095          */
6096         if ((ahc->flags & AHC_TARGETROLE) != 0) {
6097                 ahc_run_tqinfifo(ahc, /*paused*/TRUE);
6098         }
6099 #endif
6100
6101         /*
6102          * Reset the bus if we are initiating this reset
6103          */
6104         sblkctl = ahc_inb(ahc, SBLKCTL);
6105         cur_channel = 'A';
6106         if ((ahc->features & AHC_TWIN) != 0
6107          && ((sblkctl & SELBUSB) != 0))
6108             cur_channel = 'B';
6109         scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
6110         if (cur_channel != channel) {
6111                 /* Case 1: Command for another bus is active
6112                  * Stealthily reset the other bus without
6113                  * upsetting the current bus.
6114                  */
6115                 ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB);
6116                 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
6117 #ifdef AHC_TARGET_MODE
6118                 /*
6119                  * Bus resets clear ENSELI, so we cannot
6120                  * defer re-enabling bus reset interrupts
6121                  * if we are in target mode.
6122                  */
6123                 if ((ahc->flags & AHC_TARGETROLE) != 0)
6124                         simode1 |= ENSCSIRST;
6125 #endif
6126                 ahc_outb(ahc, SIMODE1, simode1);
6127                 if (initiate_reset)
6128                         ahc_reset_current_bus(ahc);
6129                 ahc_clear_intstat(ahc);
6130                 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
6131                 ahc_outb(ahc, SBLKCTL, sblkctl);
6132                 restart_needed = FALSE;
6133         } else {
6134                 /* Case 2: A command from this bus is active or we're idle */
6135                 simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
6136 #ifdef AHC_TARGET_MODE
6137                 /*
6138                  * Bus resets clear ENSELI, so we cannot
6139                  * defer re-enabling bus reset interrupts
6140                  * if we are in target mode.
6141                  */
6142                 if ((ahc->flags & AHC_TARGETROLE) != 0)
6143                         simode1 |= ENSCSIRST;
6144 #endif
6145                 ahc_outb(ahc, SIMODE1, simode1);
6146                 if (initiate_reset)
6147                         ahc_reset_current_bus(ahc);
6148                 ahc_clear_intstat(ahc);
6149                 ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
6150                 restart_needed = TRUE;
6151         }
6152
6153         /*
6154          * Clean up all the state information for the
6155          * pending transactions on this bus.
6156          */
6157         found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel,
6158                                CAM_LUN_WILDCARD, SCB_LIST_NULL,
6159                                ROLE_UNKNOWN, CAM_SCSI_BUS_RESET);
6160
6161         max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7;
6162
6163 #ifdef AHC_TARGET_MODE
6164         /*
6165          * Send an immediate notify ccb to all target more peripheral
6166          * drivers affected by this action.
6167          */
6168         for (target = 0; target <= max_scsiid; target++) {
6169                 struct ahc_tmode_tstate* tstate;
6170                 u_int lun;
6171
6172                 tstate = ahc->enabled_targets[target];
6173                 if (tstate == NULL)
6174                         continue;
6175                 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
6176                         struct ahc_tmode_lstate* lstate;
6177
6178                         lstate = tstate->enabled_luns[lun];
6179                         if (lstate == NULL)
6180                                 continue;
6181
6182                         ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD,
6183                                                EVENT_TYPE_BUS_RESET, /*arg*/0);
6184                         ahc_send_lstate_events(ahc, lstate);
6185                 }
6186         }
6187 #endif
6188         /* Notify the XPT that a bus reset occurred */
6189         ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD,
6190                        CAM_LUN_WILDCARD, AC_BUS_RESET, NULL);
6191
6192         /*
6193          * Revert to async/narrow transfers until we renegotiate.
6194          */
6195         for (target = 0; target <= max_scsiid; target++) {
6196
6197                 if (ahc->enabled_targets[target] == NULL)
6198                         continue;
6199                 for (initiator = 0; initiator <= max_scsiid; initiator++) {
6200                         struct ahc_devinfo devinfo;
6201
6202                         ahc_compile_devinfo(&devinfo, target, initiator,
6203                                             CAM_LUN_WILDCARD,
6204                                             channel, ROLE_UNKNOWN);
6205                         ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
6206                                       AHC_TRANS_CUR, /*paused*/TRUE);
6207                         ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL,
6208                                          /*period*/0, /*offset*/0,
6209                                          /*ppr_options*/0, AHC_TRANS_CUR,
6210                                          /*paused*/TRUE);
6211                 }
6212         }
6213
6214         if (restart_needed)
6215                 ahc_restart(ahc);
6216         else
6217                 ahc_unpause(ahc);
6218         return found;
6219 }
6220
6221
6222 /***************************** Residual Processing ****************************/
6223 /*
6224  * Calculate the residual for a just completed SCB.
6225  */
6226 void
6227 ahc_calc_residual(struct ahc_softc *ahc, struct scb *scb)
6228 {
6229         struct hardware_scb *hscb;
6230         struct status_pkt *spkt;
6231         uint32_t sgptr;
6232         uint32_t resid_sgptr;
6233         uint32_t resid;
6234
6235         /*
6236          * 5 cases.
6237          * 1) No residual.
6238          *    SG_RESID_VALID clear in sgptr.
6239          * 2) Transferless command
6240          * 3) Never performed any transfers.
6241          *    sgptr has SG_FULL_RESID set.
6242          * 4) No residual but target did not
6243          *    save data pointers after the
6244          *    last transfer, so sgptr was
6245          *    never updated.
6246          * 5) We have a partial residual.
6247          *    Use residual_sgptr to determine
6248          *    where we are.
6249          */
6250
6251         hscb = scb->hscb;
6252         sgptr = aic_le32toh(hscb->sgptr);
6253         if ((sgptr & SG_RESID_VALID) == 0)
6254                 /* Case 1 */
6255                 return;
6256         sgptr &= ~SG_RESID_VALID;
6257
6258         if ((sgptr & SG_LIST_NULL) != 0)
6259                 /* Case 2 */
6260                 return;
6261
6262         spkt = &hscb->shared_data.status;
6263         resid_sgptr = aic_le32toh(spkt->residual_sg_ptr);
6264         if ((sgptr & SG_FULL_RESID) != 0) {
6265                 /* Case 3 */
6266                 resid = aic_get_transfer_length(scb);
6267         } else if ((resid_sgptr & SG_LIST_NULL) != 0) {
6268                 /* Case 4 */
6269                 return;
6270         } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) {
6271                 panic("Bogus resid sgptr value 0x%x\n", resid_sgptr);
6272                 /* NOTREACHED */
6273                 return;
6274         } else {
6275                 struct ahc_dma_seg *sg;
6276
6277                 /*
6278                  * Remainder of the SG where the transfer
6279                  * stopped.
6280                  */
6281                 resid = aic_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK;
6282                 sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK);
6283
6284                 /* The residual sg_ptr always points to the next sg */
6285                 sg--;
6286
6287                 /*
6288                  * Add up the contents of all residual
6289                  * SG segments that are after the SG where
6290                  * the transfer stopped.
6291                  */
6292                 while ((aic_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) {
6293                         sg++;
6294                         resid += aic_le32toh(sg->len) & AHC_SG_LEN_MASK;
6295                 }
6296         }
6297         if ((scb->flags & SCB_SENSE) == 0)
6298                 aic_set_residual(scb, resid);
6299         else
6300                 aic_set_sense_residual(scb, resid);
6301
6302 #ifdef AHC_DEBUG
6303         if ((ahc_debug & AHC_SHOW_MISC) != 0) {
6304                 ahc_print_path(ahc, scb);
6305                 printf("Handled %sResidual of %d bytes\n",
6306                        (scb->flags & SCB_SENSE) ? "Sense " : "", resid);
6307         }
6308 #endif
6309 }
6310
6311 /******************************* Target Mode **********************************/
6312 #ifdef AHC_TARGET_MODE
6313 /*
6314  * Add a target mode event to this lun's queue
6315  */
6316 static void
6317 ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate,
6318                        u_int initiator_id, u_int event_type, u_int event_arg)
6319 {
6320         struct ahc_tmode_event *event;
6321         int pending;
6322
6323         xpt_freeze_devq(lstate->path, /*count*/1);
6324         if (lstate->event_w_idx >= lstate->event_r_idx)
6325                 pending = lstate->event_w_idx - lstate->event_r_idx;
6326         else
6327                 pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1
6328                         - (lstate->event_r_idx - lstate->event_w_idx);
6329
6330         if (event_type == EVENT_TYPE_BUS_RESET
6331          || event_type == MSG_BUS_DEV_RESET) {
6332                 /*
6333                  * Any earlier events are irrelevant, so reset our buffer.
6334                  * This has the effect of allowing us to deal with reset
6335                  * floods (an external device holding down the reset line)
6336                  * without losing the event that is really interesting.
6337                  */
6338                 lstate->event_r_idx = 0;
6339                 lstate->event_w_idx = 0;
6340                 xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE);
6341         }
6342
6343         if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) {
6344                 xpt_print_path(lstate->path);
6345                 printf("immediate event %x:%x lost\n",
6346                        lstate->event_buffer[lstate->event_r_idx].event_type,
6347                        lstate->event_buffer[lstate->event_r_idx].event_arg);
6348                 lstate->event_r_idx++;
6349                 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6350                         lstate->event_r_idx = 0;
6351                 xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE);
6352         }
6353
6354         event = &lstate->event_buffer[lstate->event_w_idx];
6355         event->initiator_id = initiator_id;
6356         event->event_type = event_type;
6357         event->event_arg = event_arg;
6358         lstate->event_w_idx++;
6359         if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6360                 lstate->event_w_idx = 0;
6361 }
6362
6363 /*
6364  * Send any target mode events queued up waiting
6365  * for immediate notify resources.
6366  */
6367 void
6368 ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate)
6369 {
6370         struct ccb_hdr *ccbh;
6371         struct ccb_immediate_notify *inot;
6372
6373         while (lstate->event_r_idx != lstate->event_w_idx
6374             && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) {
6375                 struct ahc_tmode_event *event;
6376
6377                 event = &lstate->event_buffer[lstate->event_r_idx];
6378                 SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle);
6379                 inot = (struct ccb_immediate_notify *)ccbh;
6380                 switch (event->event_type) {
6381                 case EVENT_TYPE_BUS_RESET:
6382                         ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN;
6383                         break;
6384                 default:
6385                         ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN;
6386                         inot->arg = event->event_type;
6387                         inot->seq_id = event->event_arg;
6388                         break;
6389                 }
6390                 inot->initiator_id = event->initiator_id;
6391                 xpt_done((union ccb *)inot);
6392                 lstate->event_r_idx++;
6393                 if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
6394                         lstate->event_r_idx = 0;
6395         }
6396 }
6397 #endif
6398
6399 /******************** Sequencer Program Patching/Download *********************/
6400
6401 #ifdef AHC_DUMP_SEQ
6402 void
6403 ahc_dumpseq(struct ahc_softc* ahc)
6404 {
6405         int i;
6406
6407         ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6408         ahc_outb(ahc, SEQADDR0, 0);
6409         ahc_outb(ahc, SEQADDR1, 0);
6410         for (i = 0; i < ahc->instruction_ram_size; i++) {
6411                 uint8_t ins_bytes[4];
6412
6413                 ahc_insb(ahc, SEQRAM, ins_bytes, 4);
6414                 printf("0x%08x\n", ins_bytes[0] << 24
6415                                  | ins_bytes[1] << 16
6416                                  | ins_bytes[2] << 8
6417                                  | ins_bytes[3]);
6418         }
6419 }
6420 #endif
6421
6422 static int
6423 ahc_loadseq(struct ahc_softc *ahc)
6424 {
6425         struct  cs cs_table[num_critical_sections];
6426         u_int   begin_set[num_critical_sections];
6427         u_int   end_set[num_critical_sections];
6428         struct  patch *cur_patch;
6429         u_int   cs_count;
6430         u_int   cur_cs;
6431         u_int   i;
6432         u_int   skip_addr;
6433         u_int   sg_prefetch_cnt;
6434         int     downloaded;
6435         uint8_t download_consts[7];
6436
6437         /*
6438          * Start out with 0 critical sections
6439          * that apply to this firmware load.
6440          */
6441         cs_count = 0;
6442         cur_cs = 0;
6443         memset(begin_set, 0, sizeof(begin_set));
6444         memset(end_set, 0, sizeof(end_set));
6445
6446         /* Setup downloadable constant table */
6447         download_consts[QOUTFIFO_OFFSET] = 0;
6448         if (ahc->targetcmds != NULL)
6449                 download_consts[QOUTFIFO_OFFSET] += 32;
6450         download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1;
6451         download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1;
6452         download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1);
6453         sg_prefetch_cnt = ahc->pci_cachesize;
6454         if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg)))
6455                 sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg);
6456         download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt;
6457         download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1);
6458         download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1);
6459
6460         cur_patch = patches;
6461         downloaded = 0;
6462         skip_addr = 0;
6463         ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
6464         ahc_outb(ahc, SEQADDR0, 0);
6465         ahc_outb(ahc, SEQADDR1, 0);
6466
6467         for (i = 0; i < sizeof(seqprog)/4; i++) {
6468                 if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) {
6469                         /*
6470                          * Don't download this instruction as it
6471                          * is in a patch that was removed.
6472                          */
6473                         continue;
6474                 }
6475
6476                 if (downloaded == ahc->instruction_ram_size) {
6477                         /*
6478                          * We're about to exceed the instruction
6479                          * storage capacity for this chip.  Fail
6480                          * the load.
6481                          */
6482                         printf("\n%s: Program too large for instruction memory "
6483                                "size of %d!\n", ahc_name(ahc),
6484                                ahc->instruction_ram_size);
6485                         return (ENOMEM);
6486                 }
6487
6488                 /*
6489                  * Move through the CS table until we find a CS
6490                  * that might apply to this instruction.
6491                  */
6492                 for (; cur_cs < num_critical_sections; cur_cs++) {
6493                         if (critical_sections[cur_cs].end <= i) {
6494                                 if (begin_set[cs_count] == TRUE
6495                                  && end_set[cs_count] == FALSE) {
6496                                         cs_table[cs_count].end = downloaded;
6497                                         end_set[cs_count] = TRUE;
6498                                         cs_count++;
6499                                 }
6500                                 continue;
6501                         }
6502                         if (critical_sections[cur_cs].begin <= i
6503                          && begin_set[cs_count] == FALSE) {
6504                                 cs_table[cs_count].begin = downloaded;
6505                                 begin_set[cs_count] = TRUE;
6506                         }
6507                         break;
6508                 }
6509                 ahc_download_instr(ahc, i, download_consts);
6510                 downloaded++;
6511         }
6512
6513         ahc->num_critical_sections = cs_count;
6514         if (cs_count != 0) {
6515
6516                 cs_count *= sizeof(struct cs);
6517                 ahc->critical_sections = malloc(cs_count, M_DEVBUF, M_NOWAIT);
6518                 if (ahc->critical_sections == NULL)
6519                         panic("ahc_loadseq: Could not malloc");
6520                 memcpy(ahc->critical_sections, cs_table, cs_count);
6521         }
6522         ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE);
6523
6524         if (bootverbose) {
6525                 printf(" %d instructions downloaded\n", downloaded);
6526                 printf("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n",
6527                        ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags);
6528         }
6529         return (0);
6530 }
6531
6532 static int
6533 ahc_check_patch(struct ahc_softc *ahc, struct patch **start_patch,
6534                 u_int start_instr, u_int *skip_addr)
6535 {
6536         struct  patch *cur_patch;
6537         struct  patch *last_patch;
6538         u_int   num_patches;
6539
6540         num_patches = sizeof(patches)/sizeof(struct patch);
6541         last_patch = &patches[num_patches];
6542         cur_patch = *start_patch;
6543
6544         while (cur_patch < last_patch && start_instr == cur_patch->begin) {
6545
6546                 if (cur_patch->patch_func(ahc) == 0) {
6547
6548                         /* Start rejecting code */
6549                         *skip_addr = start_instr + cur_patch->skip_instr;
6550                         cur_patch += cur_patch->skip_patch;
6551                 } else {
6552                         /* Accepted this patch.  Advance to the next
6553                          * one and wait for our intruction pointer to
6554                          * hit this point.
6555                          */
6556                         cur_patch++;
6557                 }
6558         }
6559
6560         *start_patch = cur_patch;
6561         if (start_instr < *skip_addr)
6562                 /* Still skipping */
6563                 return (0);
6564
6565         return (1);
6566 }
6567
6568 static void
6569 ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
6570 {
6571         union   ins_formats instr;
6572         struct  ins_format1 *fmt1_ins;
6573         struct  ins_format3 *fmt3_ins;
6574         u_int   opcode;
6575
6576         /*
6577          * The firmware is always compiled into a little endian format.
6578          */
6579         instr.integer = aic_le32toh(*(uint32_t*)&seqprog[instrptr * 4]);
6580
6581         fmt1_ins = &instr.format1;
6582         fmt3_ins = NULL;
6583
6584         /* Pull the opcode */
6585         opcode = instr.format1.opcode;
6586         switch (opcode) {
6587         case AIC_OP_JMP:
6588         case AIC_OP_JC:
6589         case AIC_OP_JNC:
6590         case AIC_OP_CALL:
6591         case AIC_OP_JNE:
6592         case AIC_OP_JNZ:
6593         case AIC_OP_JE:
6594         case AIC_OP_JZ:
6595         {
6596                 struct patch *cur_patch;
6597                 int address_offset;
6598                 u_int address;
6599                 u_int skip_addr;
6600                 u_int i;
6601
6602                 fmt3_ins = &instr.format3;
6603                 address_offset = 0;
6604                 address = fmt3_ins->address;
6605                 cur_patch = patches;
6606                 skip_addr = 0;
6607
6608                 for (i = 0; i < address;) {
6609
6610                         ahc_check_patch(ahc, &cur_patch, i, &skip_addr);
6611
6612                         if (skip_addr > i) {
6613                                 int end_addr;
6614
6615                                 end_addr = MIN(address, skip_addr);
6616                                 address_offset += end_addr - i;
6617                                 i = skip_addr;
6618                         } else {
6619                                 i++;
6620                         }
6621                 }
6622                 address -= address_offset;
6623                 fmt3_ins->address = address;
6624                 /* FALLTHROUGH */
6625         }
6626         case AIC_OP_OR:
6627         case AIC_OP_AND:
6628         case AIC_OP_XOR:
6629         case AIC_OP_ADD:
6630         case AIC_OP_ADC:
6631         case AIC_OP_BMOV:
6632                 if (fmt1_ins->parity != 0) {
6633                         fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
6634                 }
6635                 fmt1_ins->parity = 0;
6636                 if ((ahc->features & AHC_CMD_CHAN) == 0
6637                  && opcode == AIC_OP_BMOV) {
6638                         /*
6639                          * Block move was added at the same time
6640                          * as the command channel.  Verify that
6641                          * this is only a move of a single element
6642                          * and convert the BMOV to a MOV
6643                          * (AND with an immediate of FF).
6644                          */
6645                         if (fmt1_ins->immediate != 1)
6646                                 panic("%s: BMOV not supported\n",
6647                                       ahc_name(ahc));
6648                         fmt1_ins->opcode = AIC_OP_AND;
6649                         fmt1_ins->immediate = 0xff;
6650                 }
6651                 /* FALLTHROUGH */
6652         case AIC_OP_ROL:
6653                 if ((ahc->features & AHC_ULTRA2) != 0) {
6654                         int i, count;
6655
6656                         /* Calculate odd parity for the instruction */
6657                         for (i = 0, count = 0; i < 31; i++) {
6658                                 uint32_t mask;
6659
6660                                 mask = 0x01 << i;
6661                                 if ((instr.integer & mask) != 0)
6662                                         count++;
6663                         }
6664                         if ((count & 0x01) == 0)
6665                                 instr.format1.parity = 1;
6666                 } else {
6667                         /* Compress the instruction for older sequencers */
6668                         if (fmt3_ins != NULL) {
6669                                 instr.integer =
6670                                         fmt3_ins->immediate
6671                                       | (fmt3_ins->source << 8)
6672                                       | (fmt3_ins->address << 16)
6673                                       | (fmt3_ins->opcode << 25);
6674                         } else {
6675                                 instr.integer =
6676                                         fmt1_ins->immediate
6677                                       | (fmt1_ins->source << 8)
6678                                       | (fmt1_ins->destination << 16)
6679                                       | (fmt1_ins->ret << 24)
6680                                       | (fmt1_ins->opcode << 25);
6681                         }
6682                 }
6683                 /* The sequencer is a little endian cpu */
6684                 instr.integer = aic_htole32(instr.integer);
6685                 ahc_outsb(ahc, SEQRAM, instr.bytes, 4);
6686                 break;
6687         default:
6688                 panic("Unknown opcode encountered in seq program");
6689                 break;
6690         }
6691 }
6692
6693 int
6694 ahc_print_register(ahc_reg_parse_entry_t *table, u_int num_entries,
6695                    const char *name, u_int address, u_int value,
6696                    u_int *cur_column, u_int wrap_point)
6697 {
6698         int     printed;
6699         u_int   printed_mask;
6700         u_int   dummy_column;
6701
6702         if (cur_column == NULL) {
6703                 dummy_column = 0;
6704                 cur_column = &dummy_column;
6705         }
6706
6707         if (*cur_column >= wrap_point) {
6708                 printf("\n");
6709                 *cur_column = 0;
6710         }
6711         printed = printf("%s[0x%x]", name, value);
6712         if (table == NULL) {
6713                 printed += printf(" ");
6714                 *cur_column += printed;
6715                 return (printed);
6716         }
6717         printed_mask = 0;
6718         while (printed_mask != 0xFF) {
6719                 int entry;
6720
6721                 for (entry = 0; entry < num_entries; entry++) {
6722                         if (((value & table[entry].mask)
6723                           != table[entry].value)
6724                          || ((printed_mask & table[entry].mask)
6725                           == table[entry].mask))
6726                                 continue;
6727
6728                         printed += printf("%s%s",
6729                                           printed_mask == 0 ? ":(" : "|",
6730                                           table[entry].name);
6731                         printed_mask |= table[entry].mask;
6732
6733                         break;
6734                 }
6735                 if (entry >= num_entries)
6736                         break;
6737         }
6738         if (printed_mask != 0)
6739                 printed += printf(") ");
6740         else
6741                 printed += printf(" ");
6742         if (cur_column != NULL)
6743                 *cur_column += printed;
6744         return (printed);
6745 }
6746
6747 void
6748 ahc_dump_card_state(struct ahc_softc *ahc)
6749 {
6750         struct  scb *scb;
6751         struct  scb_tailq *untagged_q;
6752         u_int   cur_col;
6753         int     paused;
6754         int     target;
6755         int     maxtarget;
6756         int     i;
6757         uint8_t last_phase;
6758         uint8_t qinpos;
6759         uint8_t qintail;
6760         uint8_t qoutpos;
6761         uint8_t scb_index;
6762         uint8_t saved_scbptr;
6763
6764         if (ahc_is_paused(ahc)) {
6765                 paused = 1;
6766         } else {
6767                 paused = 0;
6768                 ahc_pause(ahc);
6769         }
6770
6771         saved_scbptr = ahc_inb(ahc, SCBPTR);
6772         last_phase = ahc_inb(ahc, LASTPHASE);
6773         printf(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n"
6774                "%s: Dumping Card State %s, at SEQADDR 0x%x\n",
6775                ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg,
6776                ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
6777         if (paused)
6778                 printf("Card was paused\n");
6779         printf("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n",
6780                ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX),
6781                ahc_inb(ahc, ARG_2));
6782         printf("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT),
6783                ahc_inb(ahc, SCBPTR));
6784         cur_col = 0;
6785         if ((ahc->features & AHC_DT) != 0)
6786                 ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50);
6787         ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50);
6788         ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50);
6789         ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50);
6790         ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50);
6791         ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50);
6792         ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50);
6793         ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50);
6794         ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50);
6795         ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50);
6796         ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50);
6797         ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50);
6798         ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50);
6799         ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50);
6800         ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50);
6801         ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50);
6802         ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50);
6803         ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50);
6804         ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50);
6805         if (cur_col != 0)
6806                 printf("\n");
6807         printf("STACK:");
6808         for (i = 0; i < STACK_SIZE; i++)
6809                printf(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8));
6810         printf("\nSCB count = %d\n", ahc->scb_data->numscbs);
6811         printf("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag);
6812         printf("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB));
6813         /* QINFIFO */
6814         printf("QINFIFO entries: ");
6815         if ((ahc->features & AHC_QUEUE_REGS) != 0) {
6816                 qinpos = ahc_inb(ahc, SNSCB_QOFF);
6817                 ahc_outb(ahc, SNSCB_QOFF, qinpos);
6818         } else
6819                 qinpos = ahc_inb(ahc, QINPOS);
6820         qintail = ahc->qinfifonext;
6821         while (qinpos != qintail) {
6822                 printf("%d ", ahc->qinfifo[qinpos]);
6823                 qinpos++;
6824         }
6825         printf("\n");
6826
6827         printf("Waiting Queue entries: ");
6828         scb_index = ahc_inb(ahc, WAITING_SCBH);
6829         i = 0;
6830         while (scb_index != SCB_LIST_NULL && i++ < 256) {
6831                 ahc_outb(ahc, SCBPTR, scb_index);
6832                 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
6833                 scb_index = ahc_inb(ahc, SCB_NEXT);
6834         }
6835         printf("\n");
6836
6837         printf("Disconnected Queue entries: ");
6838         scb_index = ahc_inb(ahc, DISCONNECTED_SCBH);
6839         i = 0;
6840         while (scb_index != SCB_LIST_NULL && i++ < 256) {
6841                 ahc_outb(ahc, SCBPTR, scb_index);
6842                 printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
6843                 scb_index = ahc_inb(ahc, SCB_NEXT);
6844         }
6845         printf("\n");
6846
6847         ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
6848         printf("QOUTFIFO entries: ");
6849         qoutpos = ahc->qoutfifonext;
6850         i = 0;
6851         while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) {
6852                 printf("%d ", ahc->qoutfifo[qoutpos]);
6853                 qoutpos++;
6854         }
6855         printf("\n");
6856
6857         printf("Sequencer Free SCB List: ");
6858         scb_index = ahc_inb(ahc, FREE_SCBH);
6859         i = 0;
6860         while (scb_index != SCB_LIST_NULL && i++ < 256) {
6861                 ahc_outb(ahc, SCBPTR, scb_index);
6862                 printf("%d ", scb_index);
6863                 scb_index = ahc_inb(ahc, SCB_NEXT);
6864         }
6865         printf("\n");
6866
6867         printf("Sequencer SCB Info: ");
6868         for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
6869                 ahc_outb(ahc, SCBPTR, i);
6870                 cur_col = printf("\n%3d ", i);
6871
6872                 ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60);
6873                 ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60);
6874                 ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60);
6875                 ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
6876         }
6877         printf("\n");
6878
6879         printf("Pending list: ");
6880         i = 0;
6881         LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
6882                 if (i++ > 256)
6883                         break;
6884                 cur_col = printf("\n%3d ", scb->hscb->tag);
6885                 ahc_scb_control_print(scb->hscb->control, &cur_col, 60);
6886                 ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60);
6887                 ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60);
6888                 if ((ahc->flags & AHC_PAGESCBS) == 0) {
6889                         ahc_outb(ahc, SCBPTR, scb->hscb->tag);
6890                         printf("(");
6891                         ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL),
6892                                               &cur_col, 60);
6893                         ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60);
6894                         printf(")");
6895                 }
6896         }
6897         printf("\n");
6898
6899         printf("Kernel Free SCB list: ");
6900         i = 0;
6901         SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) {
6902                 if (i++ > 256)
6903                         break;
6904                 printf("%d ", scb->hscb->tag);
6905         }
6906         printf("\n");
6907
6908         maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7;
6909         for (target = 0; target <= maxtarget; target++) {
6910                 untagged_q = &ahc->untagged_queues[target];
6911                 if (TAILQ_FIRST(untagged_q) == NULL)
6912                         continue;
6913                 printf("Untagged Q(%d): ", target);
6914                 i = 0;
6915                 TAILQ_FOREACH(scb, untagged_q, links.tqe) {
6916                         if (i++ > 256)
6917                                 break;
6918                         printf("%d ", scb->hscb->tag);
6919                 }
6920                 printf("\n");
6921         }
6922
6923         ahc_platform_dump_card_state(ahc);
6924         printf("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n");
6925         ahc_outb(ahc, SCBPTR, saved_scbptr);
6926         if (paused == 0)
6927                 ahc_unpause(ahc);
6928 }
6929
6930 /*************************** Timeout Handling *********************************/
6931 void
6932 ahc_timeout(struct scb *scb)
6933 {
6934         struct ahc_softc *ahc;
6935
6936         ahc = scb->ahc_softc;
6937         if ((scb->flags & SCB_ACTIVE) != 0) {
6938                 if ((scb->flags & SCB_TIMEDOUT) == 0) {
6939                         LIST_INSERT_HEAD(&ahc->timedout_scbs, scb,
6940                                          timedout_links);
6941                         scb->flags |= SCB_TIMEDOUT;
6942                 }
6943                 ahc_wakeup_recovery_thread(ahc);
6944         }
6945 }
6946
6947 /*
6948  * Re-schedule a timeout for the passed in SCB if we determine that some
6949  * other SCB is in the process of recovery or an SCB with a longer
6950  * timeout is still pending.  Limit our search to just "other_scb"
6951  * if it is non-NULL.
6952  */
6953 static int
6954 ahc_other_scb_timeout(struct ahc_softc *ahc, struct scb *scb,
6955                       struct scb *other_scb)
6956 {
6957         u_int   newtimeout;
6958         int     found;
6959
6960         ahc_print_path(ahc, scb);
6961         printf("Other SCB Timeout%s",
6962                (scb->flags & SCB_OTHERTCL_TIMEOUT) != 0
6963                ? " again\n" : "\n");
6964
6965         newtimeout = aic_get_timeout(scb);
6966         scb->flags |= SCB_OTHERTCL_TIMEOUT;
6967         found = 0;
6968         if (other_scb != NULL) {
6969                 if ((other_scb->flags
6970                    & (SCB_OTHERTCL_TIMEOUT|SCB_TIMEDOUT)) == 0
6971                  || (other_scb->flags & SCB_RECOVERY_SCB) != 0) {
6972                         found++;
6973                         newtimeout = MAX(aic_get_timeout(other_scb),
6974                                          newtimeout);
6975                 }
6976         } else {
6977                 LIST_FOREACH(other_scb, &ahc->pending_scbs, pending_links) {
6978                         if ((other_scb->flags
6979                            & (SCB_OTHERTCL_TIMEOUT|SCB_TIMEDOUT)) == 0
6980                          || (other_scb->flags & SCB_RECOVERY_SCB) != 0) {
6981                                 found++;
6982                                 newtimeout =
6983                                     MAX(aic_get_timeout(other_scb),
6984                                         newtimeout);
6985                         }
6986                 }
6987         }
6988
6989         if (found != 0)
6990                 aic_scb_timer_reset(scb, newtimeout);
6991         else {
6992                 ahc_print_path(ahc, scb);
6993                 printf("No other SCB worth waiting for...\n");
6994         }
6995
6996         return (found != 0);
6997 }
6998
6999 /*
7000  * ahc_recover_commands determines if any of the commands that have currently
7001  * timedout are the root cause for this timeout.  Innocent commands are given
7002  * a new timeout while we wait for the command executing on the bus to timeout.
7003  * This routine is invoked from a thread context so we are allowed to sleep.
7004  * Our lock is not held on entry.
7005  */
7006 void
7007 ahc_recover_commands(struct ahc_softc *ahc)
7008 {
7009         struct  scb *scb;
7010         int     found;
7011         int     restart_needed;
7012         u_int   last_phase;
7013
7014         /*
7015          * Pause the controller and manually flush any
7016          * commands that have just completed but that our
7017          * interrupt handler has yet to see.
7018          */
7019         ahc_pause_and_flushwork(ahc);
7020
7021         if (LIST_EMPTY(&ahc->timedout_scbs) != 0) {
7022                 /*
7023                  * The timedout commands have already
7024                  * completed.  This typically means
7025                  * that either the timeout value was on
7026                  * the hairy edge of what the device
7027                  * requires or - more likely - interrupts
7028                  * are not happening.
7029                  */
7030                 printf("%s: Timedout SCBs already complete. "
7031                        "Interrupts may not be functioning.\n", ahc_name(ahc));
7032                 ahc_unpause(ahc);
7033                 return;
7034         }
7035
7036         restart_needed = 0;
7037         printf("%s: Recovery Initiated\n", ahc_name(ahc));
7038         ahc_dump_card_state(ahc);
7039
7040         last_phase = ahc_inb(ahc, LASTPHASE);
7041         while ((scb = LIST_FIRST(&ahc->timedout_scbs)) != NULL) {
7042                 u_int   active_scb_index;
7043                 u_int   saved_scbptr;
7044                 int     target;
7045                 int     lun;
7046                 int     i;
7047                 char    channel;
7048
7049                 target = SCB_GET_TARGET(ahc, scb);
7050                 channel = SCB_GET_CHANNEL(ahc, scb);
7051                 lun = SCB_GET_LUN(scb);
7052
7053                 ahc_print_path(ahc, scb);
7054                 printf("SCB 0x%x - timed out\n", scb->hscb->tag);
7055                 if (scb->sg_count > 0) {
7056                         for (i = 0; i < scb->sg_count; i++) {
7057                                 printf("sg[%d] - Addr 0x%x : Length %d\n",
7058                                        i,
7059                                        scb->sg_list[i].addr,
7060                                        scb->sg_list[i].len & AHC_SG_LEN_MASK);
7061                         }
7062                 }
7063                 if (scb->flags & (SCB_DEVICE_RESET|SCB_ABORT)) {
7064                         /*
7065                          * Been down this road before.
7066                          * Do a full bus reset.
7067                          */
7068                         aic_set_transaction_status(scb, CAM_CMD_TIMEOUT);
7069 bus_reset:
7070                         found = ahc_reset_channel(ahc, channel,
7071                                                   /*Initiate Reset*/TRUE);
7072                         printf("%s: Issued Channel %c Bus Reset. "
7073                                "%d SCBs aborted\n", ahc_name(ahc), channel,
7074                                found);
7075                         continue;
7076                 }
7077
7078                 /*
7079                  * Remove the command from the timedout list in
7080                  * preparation for requeing it.
7081                  */
7082                 LIST_REMOVE(scb, timedout_links);
7083                 scb->flags &= ~SCB_TIMEDOUT;
7084
7085                 /*
7086                  * If we are a target, transition to bus free and report
7087                  * the timeout.
7088                  *
7089                  * The target/initiator that is holding up the bus may not
7090                  * be the same as the one that triggered this timeout
7091                  * (different commands have different timeout lengths).
7092                  * If the bus is idle and we are actiing as the initiator
7093                  * for this request, queue a BDR message to the timed out
7094                  * target.  Otherwise, if the timed out transaction is
7095                  * active:
7096                  *   Initiator transaction:
7097                  *      Stuff the message buffer with a BDR message and assert
7098                  *      ATN in the hopes that the target will let go of the bus
7099                  *      and go to the mesgout phase.  If this fails, we'll
7100                  *      get another timeout 2 seconds later which will attempt
7101                  *      a bus reset.
7102                  *
7103                  *   Target transaction:
7104                  *      Transition to BUS FREE and report the error.
7105                  *      It's good to be the target!
7106                  */
7107                 saved_scbptr = ahc_inb(ahc, SCBPTR);
7108                 active_scb_index = ahc_inb(ahc, SCB_TAG);
7109
7110                 if ((ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0
7111                   && (active_scb_index < ahc->scb_data->numscbs)) {
7112                         struct scb *active_scb;
7113
7114                         /*
7115                          * If the active SCB is not us, assume that
7116                          * the active SCB has a longer timeout than
7117                          * the timedout SCB, and wait for the active
7118                          * SCB to timeout.
7119                          */
7120                         active_scb = ahc_lookup_scb(ahc, active_scb_index);
7121                         if (active_scb != scb) {
7122                                 if (ahc_other_scb_timeout(ahc, scb,
7123                                                           active_scb) == 0)
7124                                         goto bus_reset;
7125                                 continue;
7126                         }
7127
7128                         /* It's us */
7129                         if ((scb->flags & SCB_TARGET_SCB) != 0) {
7130
7131                                 /*
7132                                  * Send back any queued up transactions
7133                                  * and properly record the error condition.
7134                                  */
7135                                 ahc_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
7136                                                SCB_GET_CHANNEL(ahc, scb),
7137                                                SCB_GET_LUN(scb),
7138                                                scb->hscb->tag,
7139                                                ROLE_TARGET,
7140                                                CAM_CMD_TIMEOUT);
7141
7142                                 /* Will clear us from the bus */
7143                                 restart_needed = 1;
7144                                 break;
7145                         }
7146
7147                         ahc_set_recoveryscb(ahc, active_scb);
7148                         ahc_outb(ahc, MSG_OUT, HOST_MSG);
7149                         ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
7150                         ahc_print_path(ahc, active_scb);
7151                         printf("BDR message in message buffer\n");
7152                         active_scb->flags |= SCB_DEVICE_RESET;
7153                         aic_scb_timer_reset(scb, 2 * 1000);
7154                 } else if (last_phase != P_BUSFREE
7155                         && (ahc_inb(ahc, SSTAT1) & REQINIT) == 0) {
7156                         /*
7157                          * SCB is not identified, there
7158                          * is no pending REQ, and the sequencer
7159                          * has not seen a busfree.  Looks like
7160                          * a stuck connection waiting to
7161                          * go busfree.  Reset the bus.
7162                          */
7163                         printf("%s: Connection stuck awaiting busfree or "
7164                                "Identify Msg.\n", ahc_name(ahc));
7165                         goto bus_reset;
7166                 } else {
7167                         int      disconnected;
7168
7169                         if (last_phase != P_BUSFREE
7170                          && (ahc_inb(ahc, SSTAT0) & TARGET) != 0) {
7171                                 /* Hung target selection.  Goto busfree */
7172                                 printf("%s: Hung target selection\n",
7173                                        ahc_name(ahc));
7174                                 restart_needed = 1;
7175                                 break;
7176                         }
7177
7178                         /* XXX Shouldn't panic.  Just punt instead? */
7179                         if ((scb->flags & SCB_TARGET_SCB) != 0)
7180                                 panic("Timed-out target SCB but bus idle");
7181
7182                         if (ahc_search_qinfifo(ahc, target, channel, lun,
7183                                                scb->hscb->tag, ROLE_INITIATOR,
7184                                                /*status*/0, SEARCH_COUNT) > 0) {
7185                                 disconnected = FALSE;
7186                         } else {
7187                                 disconnected = TRUE;
7188                         }
7189
7190                         if (disconnected) {
7191
7192                                 ahc_set_recoveryscb(ahc, scb);
7193                                 /*
7194                                  * Actually re-queue this SCB in an attempt
7195                                  * to select the device before it reconnects.
7196                                  * In either case (selection or reselection),
7197                                  * we will now issue a target reset to the
7198                                  * timed-out device.
7199                                  *
7200                                  * Set the MK_MESSAGE control bit indicating
7201                                  * that we desire to send a message.  We
7202                                  * also set the disconnected flag since
7203                                  * in the paging case there is no guarantee
7204                                  * that our SCB control byte matches the
7205                                  * version on the card.  We don't want the
7206                                  * sequencer to abort the command thinking
7207                                  * an unsolicited reselection occurred.
7208                                  */
7209                                 scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
7210                                 scb->flags |= SCB_DEVICE_RESET;
7211
7212                                 /*
7213                                  * Remove any cached copy of this SCB in the
7214                                  * disconnected list in preparation for the
7215                                  * queuing of our abort SCB.  We use the
7216                                  * same element in the SCB, SCB_NEXT, for
7217                                  * both the qinfifo and the disconnected list.
7218                                  */
7219                                 ahc_search_disc_list(ahc, target, channel,
7220                                                      lun, scb->hscb->tag,
7221                                                      /*stop_on_first*/TRUE,
7222                                                      /*remove*/TRUE,
7223                                                      /*save_state*/FALSE);
7224
7225                                 /*
7226                                  * In the non-paging case, the sequencer will
7227                                  * never re-reference the in-core SCB.
7228                                  * To make sure we are notified during
7229                                  * reslection, set the MK_MESSAGE flag in
7230                                  * the card's copy of the SCB.
7231                                  */
7232                                 if ((ahc->flags & AHC_PAGESCBS) == 0) {
7233                                         ahc_outb(ahc, SCBPTR, scb->hscb->tag);
7234                                         ahc_outb(ahc, SCB_CONTROL,
7235                                                  ahc_inb(ahc, SCB_CONTROL)
7236                                                 | MK_MESSAGE);
7237                                 }
7238
7239                                 /*
7240                                  * Clear out any entries in the QINFIFO first
7241                                  * so we are the next SCB for this target
7242                                  * to run.
7243                                  */
7244                                 ahc_search_qinfifo(ahc,
7245                                                    SCB_GET_TARGET(ahc, scb),
7246                                                    channel, SCB_GET_LUN(scb),
7247                                                    SCB_LIST_NULL,
7248                                                    ROLE_INITIATOR,
7249                                                    CAM_REQUEUE_REQ,
7250                                                    SEARCH_COMPLETE);
7251                                 ahc_print_path(ahc, scb);
7252                                 printf("Queuing a BDR SCB\n");
7253                                 ahc_qinfifo_requeue_tail(ahc, scb);
7254                                 ahc_outb(ahc, SCBPTR, saved_scbptr);
7255                                 aic_scb_timer_reset(scb, 2 * 1000);
7256                         } else {
7257                                 /* Go "immediatly" to the bus reset */
7258                                 /* This shouldn't happen */
7259                                 ahc_set_recoveryscb(ahc, scb);
7260                                 ahc_print_path(ahc, scb);
7261                                 printf("SCB %d: Immediate reset.  "
7262                                         "Flags = 0x%x\n", scb->hscb->tag,
7263                                         scb->flags);
7264                                 goto bus_reset;
7265                         }
7266                 }
7267                 break;
7268         }
7269
7270         /*
7271          * Any remaining SCBs were not the "culprit", so remove
7272          * them from the timeout list.  The timer for these commands
7273          * will be reset once the recovery SCB completes.
7274          */
7275         while ((scb = LIST_FIRST(&ahc->timedout_scbs)) != NULL) {
7276
7277                 LIST_REMOVE(scb, timedout_links);
7278                 scb->flags &= ~SCB_TIMEDOUT;
7279         }
7280
7281         if (restart_needed)
7282                 ahc_restart(ahc);
7283         else
7284                 ahc_unpause(ahc);
7285 }
7286
7287 /************************* Target Mode ****************************************/
7288 #ifdef AHC_TARGET_MODE
7289 cam_status
7290 ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb,
7291                     struct ahc_tmode_tstate **tstate,
7292                     struct ahc_tmode_lstate **lstate,
7293                     int notfound_failure)
7294 {
7295
7296         if ((ahc->features & AHC_TARGETMODE) == 0)
7297                 return (CAM_REQ_INVALID);
7298
7299         /*
7300          * Handle the 'black hole' device that sucks up
7301          * requests to unattached luns on enabled targets.
7302          */
7303         if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD
7304          && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) {
7305                 *tstate = NULL;
7306                 *lstate = ahc->black_hole;
7307         } else {
7308                 u_int max_id;
7309
7310                 max_id = (ahc->features & AHC_WIDE) ? 15 : 7;
7311                 if (ccb->ccb_h.target_id > max_id)
7312                         return (CAM_TID_INVALID);
7313
7314                 if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS)
7315                         return (CAM_LUN_INVALID);
7316
7317                 *tstate = ahc->enabled_targets[ccb->ccb_h.target_id];
7318                 *lstate = NULL;
7319                 if (*tstate != NULL)
7320                         *lstate =
7321                             (*tstate)->enabled_luns[ccb->ccb_h.target_lun];
7322         }
7323
7324         if (notfound_failure != 0 && *lstate == NULL)
7325                 return (CAM_PATH_INVALID);
7326
7327         return (CAM_REQ_CMP);
7328 }
7329
7330 void
7331 ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb)
7332 {
7333         struct     ahc_tmode_tstate *tstate;
7334         struct     ahc_tmode_lstate *lstate;
7335         struct     ccb_en_lun *cel;
7336         cam_status status;
7337         u_int      target;
7338         u_int      lun;
7339         u_int      target_mask;
7340         u_int      our_id;
7341         int        error;
7342         char       channel;
7343
7344         status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate,
7345                                      /*notfound_failure*/FALSE);
7346
7347         if (status != CAM_REQ_CMP) {
7348                 ccb->ccb_h.status = status;
7349                 return;
7350         }
7351
7352         if (cam_sim_bus(sim) == 0)
7353                 our_id = ahc->our_id;
7354         else
7355                 our_id = ahc->our_id_b;
7356
7357         if (ccb->ccb_h.target_id != our_id) {
7358                 /*
7359                  * our_id represents our initiator ID, or
7360                  * the ID of the first target to have an
7361                  * enabled lun in target mode.  There are
7362                  * two cases that may preclude enabling a
7363                  * target id other than our_id.
7364                  *
7365                  *   o our_id is for an active initiator role.
7366                  *     Since the hardware does not support
7367                  *     reselections to the initiator role at
7368                  *     anything other than our_id, and our_id
7369                  *     is used by the hardware to indicate the
7370                  *     ID to use for both select-out and
7371                  *     reselect-out operations, the only target
7372                  *     ID we can support in this mode is our_id.
7373                  *
7374                  *   o The MULTARGID feature is not available and
7375                  *     a previous target mode ID has been enabled.
7376                  */
7377                 if ((ahc->features & AHC_MULTIROLE) != 0) {
7378
7379                         if ((ahc->features & AHC_MULTI_TID) != 0
7380                          && (ahc->flags & AHC_INITIATORROLE) != 0) {
7381                                 /*
7382                                  * Only allow additional targets if
7383                                  * the initiator role is disabled.
7384                                  * The hardware cannot handle a re-select-in
7385                                  * on the initiator id during a re-select-out
7386                                  * on a different target id.
7387                                  */
7388                                 status = CAM_TID_INVALID;
7389                         } else if ((ahc->flags & AHC_INITIATORROLE) != 0
7390                                 || ahc->enabled_luns > 0) {
7391                                 /*
7392                                  * Only allow our target id to change
7393                                  * if the initiator role is not configured
7394                                  * and there are no enabled luns which
7395                                  * are attached to the currently registered
7396                                  * scsi id.
7397                                  */
7398                                 status = CAM_TID_INVALID;
7399                         }
7400                 } else if ((ahc->features & AHC_MULTI_TID) == 0
7401                         && ahc->enabled_luns > 0) {
7402
7403                         status = CAM_TID_INVALID;
7404                 }
7405         }
7406
7407         if (status != CAM_REQ_CMP) {
7408                 ccb->ccb_h.status = status;
7409                 return;
7410         }
7411
7412         /*
7413          * We now have an id that is valid.
7414          * If we aren't in target mode, switch modes.
7415          */
7416         if ((ahc->flags & AHC_TARGETROLE) == 0
7417          && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
7418                 ahc_flag saved_flags;
7419
7420                 printf("Configuring Target Mode\n");
7421                 if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
7422                         ccb->ccb_h.status = CAM_BUSY;
7423                         return;
7424                 }
7425                 saved_flags = ahc->flags;
7426                 ahc->flags |= AHC_TARGETROLE;
7427                 if ((ahc->features & AHC_MULTIROLE) == 0)
7428                         ahc->flags &= ~AHC_INITIATORROLE;
7429                 ahc_pause(ahc);
7430                 error = ahc_loadseq(ahc);
7431                 if (error != 0) {
7432                         /*
7433                          * Restore original configuration and notify
7434                          * the caller that we cannot support target mode.
7435                          * Since the adapter started out in this
7436                          * configuration, the firmware load will succeed,
7437                          * so there is no point in checking ahc_loadseq's
7438                          * return value.
7439                          */
7440                         ahc->flags = saved_flags;
7441                         (void)ahc_loadseq(ahc);
7442                         ahc_restart(ahc);
7443                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
7444                         return;
7445                 }
7446                 ahc_restart(ahc);
7447         }
7448         cel = &ccb->cel;
7449         target = ccb->ccb_h.target_id;
7450         lun = ccb->ccb_h.target_lun;
7451         channel = SIM_CHANNEL(ahc, sim);
7452         target_mask = 0x01 << target;
7453         if (channel == 'B')
7454                 target_mask <<= 8;
7455
7456         if (cel->enable != 0) {
7457                 u_int scsiseq;
7458
7459                 /* Are we already enabled?? */
7460                 if (lstate != NULL) {
7461                         xpt_print_path(ccb->ccb_h.path);
7462                         printf("Lun already enabled\n");
7463                         ccb->ccb_h.status = CAM_LUN_ALRDY_ENA;
7464                         return;
7465                 }
7466
7467                 if (cel->grp6_len != 0
7468                  || cel->grp7_len != 0) {
7469                         /*
7470                          * Don't (yet?) support vendor
7471                          * specific commands.
7472                          */
7473                         ccb->ccb_h.status = CAM_REQ_INVALID;
7474                         printf("Non-zero Group Codes\n");
7475                         return;
7476                 }
7477
7478                 /*
7479                  * Seems to be okay.
7480                  * Setup our data structures.
7481                  */
7482                 if (target != CAM_TARGET_WILDCARD && tstate == NULL) {
7483                         tstate = ahc_alloc_tstate(ahc, target, channel);
7484                         if (tstate == NULL) {
7485                                 xpt_print_path(ccb->ccb_h.path);
7486                                 printf("Couldn't allocate tstate\n");
7487                                 ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
7488                                 return;
7489                         }
7490                 }
7491                 lstate = malloc(sizeof(*lstate), M_DEVBUF, M_NOWAIT);
7492                 if (lstate == NULL) {
7493                         xpt_print_path(ccb->ccb_h.path);
7494                         printf("Couldn't allocate lstate\n");
7495                         ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
7496                         return;
7497                 }
7498                 memset(lstate, 0, sizeof(*lstate));
7499                 status = xpt_create_path(&lstate->path, /*periph*/NULL,
7500                                          xpt_path_path_id(ccb->ccb_h.path),
7501                                          xpt_path_target_id(ccb->ccb_h.path),
7502                                          xpt_path_lun_id(ccb->ccb_h.path));
7503                 if (status != CAM_REQ_CMP) {
7504                         free(lstate, M_DEVBUF);
7505                         xpt_print_path(ccb->ccb_h.path);
7506                         printf("Couldn't allocate path\n");
7507                         ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
7508                         return;
7509                 }
7510                 SLIST_INIT(&lstate->accept_tios);
7511                 SLIST_INIT(&lstate->immed_notifies);
7512                 ahc_pause(ahc);
7513                 if (target != CAM_TARGET_WILDCARD) {
7514                         tstate->enabled_luns[lun] = lstate;
7515                         ahc->enabled_luns++;
7516
7517                         if ((ahc->features & AHC_MULTI_TID) != 0) {
7518                                 u_int targid_mask;
7519
7520                                 targid_mask = ahc_inb(ahc, TARGID)
7521                                             | (ahc_inb(ahc, TARGID + 1) << 8);
7522
7523                                 targid_mask |= target_mask;
7524                                 ahc_outb(ahc, TARGID, targid_mask);
7525                                 ahc_outb(ahc, TARGID+1, (targid_mask >> 8));
7526
7527                                 ahc_update_scsiid(ahc, targid_mask);
7528                         } else {
7529                                 u_int our_id;
7530                                 char  channel;
7531
7532                                 channel = SIM_CHANNEL(ahc, sim);
7533                                 our_id = SIM_SCSI_ID(ahc, sim);
7534
7535                                 /*
7536                                  * This can only happen if selections
7537                                  * are not enabled
7538                                  */
7539                                 if (target != our_id) {
7540                                         u_int sblkctl;
7541                                         char  cur_channel;
7542                                         int   swap;
7543
7544                                         sblkctl = ahc_inb(ahc, SBLKCTL);
7545                                         cur_channel = (sblkctl & SELBUSB)
7546                                                     ? 'B' : 'A';
7547                                         if ((ahc->features & AHC_TWIN) == 0)
7548                                                 cur_channel = 'A';
7549                                         swap = cur_channel != channel;
7550                                         if (channel == 'A')
7551                                                 ahc->our_id = target;
7552                                         else
7553                                                 ahc->our_id_b = target;
7554
7555                                         if (swap)
7556                                                 ahc_outb(ahc, SBLKCTL,
7557                                                          sblkctl ^ SELBUSB);
7558
7559                                         ahc_outb(ahc, SCSIID, target);
7560
7561                                         if (swap)
7562                                                 ahc_outb(ahc, SBLKCTL, sblkctl);
7563                                 }
7564                         }
7565                 } else
7566                         ahc->black_hole = lstate;
7567                 /* Allow select-in operations */
7568                 if (ahc->black_hole != NULL && ahc->enabled_luns > 0) {
7569                         scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
7570                         scsiseq |= ENSELI;
7571                         ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
7572                         scsiseq = ahc_inb(ahc, SCSISEQ);
7573                         scsiseq |= ENSELI;
7574                         ahc_outb(ahc, SCSISEQ, scsiseq);
7575                 }
7576                 ahc_unpause(ahc);
7577                 ccb->ccb_h.status = CAM_REQ_CMP;
7578                 xpt_print_path(ccb->ccb_h.path);
7579                 printf("Lun now enabled for target mode\n");
7580         } else {
7581                 struct scb *scb;
7582                 int i, empty;
7583
7584                 if (lstate == NULL) {
7585                         ccb->ccb_h.status = CAM_LUN_INVALID;
7586                         return;
7587                 }
7588
7589                 ccb->ccb_h.status = CAM_REQ_CMP;
7590                 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
7591                         struct ccb_hdr *ccbh;
7592
7593                         ccbh = &scb->io_ctx->ccb_h;
7594                         if (ccbh->func_code == XPT_CONT_TARGET_IO
7595                          && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){
7596                                 printf("CTIO pending\n");
7597                                 ccb->ccb_h.status = CAM_REQ_INVALID;
7598                                 return;
7599                         }
7600                 }
7601
7602                 if (SLIST_FIRST(&lstate->accept_tios) != NULL) {
7603                         printf("ATIOs pending\n");
7604                         ccb->ccb_h.status = CAM_REQ_INVALID;
7605                 }
7606
7607                 if (SLIST_FIRST(&lstate->immed_notifies) != NULL) {
7608                         printf("INOTs pending\n");
7609                         ccb->ccb_h.status = CAM_REQ_INVALID;
7610                 }
7611
7612                 if (ccb->ccb_h.status != CAM_REQ_CMP) {
7613                         return;
7614                 }
7615
7616                 xpt_print_path(ccb->ccb_h.path);
7617                 printf("Target mode disabled\n");
7618                 xpt_free_path(lstate->path);
7619                 free(lstate, M_DEVBUF);
7620
7621                 ahc_pause(ahc);
7622                 /* Can we clean up the target too? */
7623                 if (target != CAM_TARGET_WILDCARD) {
7624                         tstate->enabled_luns[lun] = NULL;
7625                         ahc->enabled_luns--;
7626                         for (empty = 1, i = 0; i < 8; i++)
7627                                 if (tstate->enabled_luns[i] != NULL) {
7628                                         empty = 0;
7629                                         break;
7630                                 }
7631
7632                         if (empty) {
7633                                 ahc_free_tstate(ahc, target, channel,
7634                                                 /*force*/FALSE);
7635                                 if (ahc->features & AHC_MULTI_TID) {
7636                                         u_int targid_mask;
7637
7638                                         targid_mask = ahc_inb(ahc, TARGID)
7639                                                     | (ahc_inb(ahc, TARGID + 1)
7640                                                        << 8);
7641
7642                                         targid_mask &= ~target_mask;
7643                                         ahc_outb(ahc, TARGID, targid_mask);
7644                                         ahc_outb(ahc, TARGID+1,
7645                                                  (targid_mask >> 8));
7646                                         ahc_update_scsiid(ahc, targid_mask);
7647                                 }
7648                         }
7649                 } else {
7650
7651                         ahc->black_hole = NULL;
7652
7653                         /*
7654                          * We can't allow selections without
7655                          * our black hole device.
7656                          */
7657                         empty = TRUE;
7658                 }
7659                 if (ahc->enabled_luns == 0) {
7660                         /* Disallow select-in */
7661                         u_int scsiseq;
7662
7663                         scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
7664                         scsiseq &= ~ENSELI;
7665                         ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
7666                         scsiseq = ahc_inb(ahc, SCSISEQ);
7667                         scsiseq &= ~ENSELI;
7668                         ahc_outb(ahc, SCSISEQ, scsiseq);
7669
7670                         if ((ahc->features & AHC_MULTIROLE) == 0) {
7671                                 printf("Configuring Initiator Mode\n");
7672                                 ahc->flags &= ~AHC_TARGETROLE;
7673                                 ahc->flags |= AHC_INITIATORROLE;
7674                                 /*
7675                                  * Returning to a configuration that
7676                                  * fit previously will always succeed.
7677                                  */
7678                                 (void)ahc_loadseq(ahc);
7679                                 ahc_restart(ahc);
7680                                 /*
7681                                  * Unpaused.  The extra unpause
7682                                  * that follows is harmless.
7683                                  */
7684                         }
7685                 }
7686                 ahc_unpause(ahc);
7687         }
7688 }
7689
7690 static void
7691 ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask)
7692 {
7693         u_int scsiid_mask;
7694         u_int scsiid;
7695
7696         if ((ahc->features & AHC_MULTI_TID) == 0)
7697                 panic("ahc_update_scsiid called on non-multitid unit\n");
7698
7699         /*
7700          * Since we will rely on the TARGID mask
7701          * for selection enables, ensure that OID
7702          * in SCSIID is not set to some other ID
7703          * that we don't want to allow selections on.
7704          */
7705         if ((ahc->features & AHC_ULTRA2) != 0)
7706                 scsiid = ahc_inb(ahc, SCSIID_ULTRA2);
7707         else
7708                 scsiid = ahc_inb(ahc, SCSIID);
7709         scsiid_mask = 0x1 << (scsiid & OID);
7710         if ((targid_mask & scsiid_mask) == 0) {
7711                 u_int our_id;
7712
7713                 /* ffs counts from 1 */
7714                 our_id = ffs(targid_mask);
7715                 if (our_id == 0)
7716                         our_id = ahc->our_id;
7717                 else
7718                         our_id--;
7719                 scsiid &= TID;
7720                 scsiid |= our_id;
7721         }
7722         if ((ahc->features & AHC_ULTRA2) != 0)
7723                 ahc_outb(ahc, SCSIID_ULTRA2, scsiid);
7724         else
7725                 ahc_outb(ahc, SCSIID, scsiid);
7726 }
7727
7728 void
7729 ahc_run_tqinfifo(struct ahc_softc *ahc, int paused)
7730 {
7731         struct target_cmd *cmd;
7732
7733         /*
7734          * If the card supports auto-access pause,
7735          * we can access the card directly regardless
7736          * of whether it is paused or not.
7737          */
7738         if ((ahc->features & AHC_AUTOPAUSE) != 0)
7739                 paused = TRUE;
7740
7741         ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD);
7742         while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) {
7743
7744                 /*
7745                  * Only advance through the queue if we
7746                  * have the resources to process the command.
7747                  */
7748                 if (ahc_handle_target_cmd(ahc, cmd) != 0)
7749                         break;
7750
7751                 cmd->cmd_valid = 0;
7752                 aic_dmamap_sync(ahc, ahc->shared_data_dmat,
7753                                 ahc->shared_data_dmamap,
7754                                 ahc_targetcmd_offset(ahc, ahc->tqinfifonext),
7755                                 sizeof(struct target_cmd),
7756                                 BUS_DMASYNC_PREREAD);
7757                 ahc->tqinfifonext++;
7758
7759                 /*
7760                  * Lazily update our position in the target mode incoming
7761                  * command queue as seen by the sequencer.
7762                  */
7763                 if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) {
7764                         if ((ahc->features & AHC_HS_MAILBOX) != 0) {
7765                                 u_int hs_mailbox;
7766
7767                                 hs_mailbox = ahc_inb(ahc, HS_MAILBOX);
7768                                 hs_mailbox &= ~HOST_TQINPOS;
7769                                 hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS;
7770                                 ahc_outb(ahc, HS_MAILBOX, hs_mailbox);
7771                         } else {
7772                                 if (!paused)
7773                                         ahc_pause(ahc);
7774                                 ahc_outb(ahc, KERNEL_TQINPOS,
7775                                          ahc->tqinfifonext & HOST_TQINPOS);
7776                                 if (!paused)
7777                                         ahc_unpause(ahc);
7778                         }
7779                 }
7780         }
7781 }
7782
7783 static int
7784 ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd)
7785 {
7786         struct    ahc_tmode_tstate *tstate;
7787         struct    ahc_tmode_lstate *lstate;
7788         struct    ccb_accept_tio *atio;
7789         uint8_t *byte;
7790         int       initiator;
7791         int       target;
7792         int       lun;
7793
7794         initiator = SCSIID_TARGET(ahc, cmd->scsiid);
7795         target = SCSIID_OUR_ID(cmd->scsiid);
7796         lun    = (cmd->identify & MSG_IDENTIFY_LUNMASK);
7797
7798         byte = cmd->bytes;
7799         tstate = ahc->enabled_targets[target];
7800         lstate = NULL;
7801         if (tstate != NULL)
7802                 lstate = tstate->enabled_luns[lun];
7803
7804         /*
7805          * Commands for disabled luns go to the black hole driver.
7806          */
7807         if (lstate == NULL)
7808                 lstate = ahc->black_hole;
7809
7810         atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios);
7811         if (atio == NULL) {
7812                 ahc->flags |= AHC_TQINFIFO_BLOCKED;
7813                 /*
7814                  * Wait for more ATIOs from the peripheral driver for this lun.
7815                  */
7816                 if (bootverbose)
7817                         printf("%s: ATIOs exhausted\n", ahc_name(ahc));
7818                 return (1);
7819         } else
7820                 ahc->flags &= ~AHC_TQINFIFO_BLOCKED;
7821 #ifdef AHC_DEBUG
7822         if (ahc_debug & AHC_SHOW_TQIN) {
7823                 printf("Incoming command from %d for %d:%d%s\n",
7824                        initiator, target, lun,
7825                        lstate == ahc->black_hole ? "(Black Holed)" : "");
7826         }
7827 #endif
7828         SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle);
7829
7830         if (lstate == ahc->black_hole) {
7831                 /* Fill in the wildcards */
7832                 atio->ccb_h.target_id = target;
7833                 atio->ccb_h.target_lun = lun;
7834         }
7835
7836         /*
7837          * Package it up and send it off to
7838          * whomever has this lun enabled.
7839          */
7840         atio->sense_len = 0;
7841         atio->init_id = initiator;
7842         if (byte[0] != 0xFF) {
7843                 /* Tag was included */
7844                 atio->tag_action = *byte++;
7845                 atio->tag_id = *byte++;
7846                 atio->ccb_h.flags = CAM_TAG_ACTION_VALID;
7847         } else {
7848                 atio->ccb_h.flags = 0;
7849         }
7850         byte++;
7851
7852         /* Okay.  Now determine the cdb size based on the command code */
7853         switch (*byte >> CMD_GROUP_CODE_SHIFT) {
7854         case 0:
7855                 atio->cdb_len = 6;
7856                 break;
7857         case 1:
7858         case 2:
7859                 atio->cdb_len = 10;
7860                 break;
7861         case 4:
7862                 atio->cdb_len = 16;
7863                 break;
7864         case 5:
7865                 atio->cdb_len = 12;
7866                 break;
7867         case 3:
7868         default:
7869                 /* Only copy the opcode. */
7870                 atio->cdb_len = 1;
7871                 printf("Reserved or VU command code type encountered\n");
7872                 break;
7873         }
7874
7875         memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len);
7876
7877         atio->ccb_h.status |= CAM_CDB_RECVD;
7878
7879         if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) {
7880                 /*
7881                  * We weren't allowed to disconnect.
7882                  * We're hanging on the bus until a
7883                  * continue target I/O comes in response
7884                  * to this accept tio.
7885                  */
7886 #ifdef AHC_DEBUG
7887                 if (ahc_debug & AHC_SHOW_TQIN) {
7888                         printf("Received Immediate Command %d:%d:%d - %p\n",
7889                                initiator, target, lun, ahc->pending_device);
7890                 }
7891 #endif
7892                 ahc->pending_device = lstate;
7893                 aic_freeze_ccb((union ccb *)atio);
7894                 atio->ccb_h.flags |= CAM_DIS_DISCONNECT;
7895         }
7896         xpt_done((union ccb*)atio);
7897         return (0);
7898 }
7899
7900 #endif