sys/dev/ahb/ahb.c

   1 /*-
   2  * CAM SCSI device driver for the Adaptec 174X SCSI Host adapter
   3  *
   4  * Copyright (c) 1998 Justin T. Gibbs
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice immediately at the beginning of the file, without modification,
  12  *    this list of conditions, and the following disclaimer.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD$
  29  */
  30
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/kernel.h>
  34 #include <sys/malloc.h>
  35 #include <sys/module.h>
  36 #include <sys/lock.h>
  37 #include <sys/mutex.h>
  38 #include <sys/bus.h>
  39
  40 #include <machine/bus.h>
  41 #include <machine/resource.h>
  42 #include <sys/rman.h>
  43
  44 #include <cam/cam.h>
  45 #include <cam/cam_ccb.h>
  46 #include <cam/cam_sim.h>
  47 #include <cam/cam_xpt_sim.h>
  48 #include <cam/cam_debug.h>
  49
  50 #include <cam/scsi/scsi_message.h>
  51
  52 #include <dev/eisa/eisaconf.h>
  53
  54 #include <dev/ahb/ahbreg.h>
  55
  56 #define ccb_ecb_ptr spriv_ptr0
  57 #define ccb_ahb_ptr spriv_ptr1
  58
  59 #define ahb_inb(ahb, port)                              \
  60         bus_space_read_1((ahb)->tag, (ahb)->bsh, port)
  61
  62 #define ahb_inl(ahb, port)                              \
  63         bus_space_read_4((ahb)->tag, (ahb)->bsh, port)
  64
  65 #define ahb_outb(ahb, port, value)                      \
  66         bus_space_write_1((ahb)->tag, (ahb)->bsh, port, value)
  67
  68 #define ahb_outl(ahb, port, value)                      \
  69         bus_space_write_4((ahb)->tag, (ahb)->bsh, port, value)
  70
  71 static const char               *ahbmatch(eisa_id_t type);
  72 static struct ahb_softc         *ahballoc(device_t dev, struct resource *res);
  73 static void                      ahbfree(struct ahb_softc *ahb);
  74 static int                       ahbreset(struct ahb_softc *ahb);
  75 static void                      ahbmapecbs(void *arg, bus_dma_segment_t *segs,
  76                                             int nseg, int error);
  77 static int                       ahbxptattach(struct ahb_softc *ahb);
  78 static void                      ahbhandleimmed(struct ahb_softc *ahb,
  79                                                 u_int32_t mbox, u_int intstat);
  80 static void                      ahbcalcresid(struct ahb_softc *ahb,
  81                                               struct ecb *ecb, union ccb *ccb);
  82 static __inline void             ahbdone(struct ahb_softc *ahb, u_int32_t mbox,
  83                                          u_int intstat);
  84 static void                      ahbintr(void *arg);
  85 static bus_dmamap_callback_t     ahbexecuteecb;
  86 static void                      ahbaction(struct cam_sim *sim, union ccb *ccb);
  87 static void                      ahbpoll(struct cam_sim *sim);
  88
  89 /* Our timeout handler */
  90 static timeout_t ahbtimeout;
  91
  92 static __inline struct ecb*     ahbecbget(struct ahb_softc *ahb);
  93 static __inline void            ahbecbfree(struct ahb_softc* ahb,
  94                                            struct ecb* ecb);
  95 static __inline u_int32_t       ahbecbvtop(struct ahb_softc *ahb,
  96                                            struct ecb *ecb);
  97 static __inline struct ecb*     ahbecbptov(struct ahb_softc *ahb,
  98                                            u_int32_t ecb_addr);
  99 static __inline u_int32_t       ahbstatuspaddr(u_int32_t ecb_paddr);
 100 static __inline u_int32_t       ahbsensepaddr(u_int32_t ecb_paddr);
 101 static __inline u_int32_t       ahbsgpaddr(u_int32_t ecb_paddr);
 102 static __inline void            ahbqueuembox(struct ahb_softc *ahb,
 103                                              u_int32_t mboxval,
 104                                              u_int attn_code);
 105
 106 static __inline struct ecb*
 107 ahbecbget(struct ahb_softc *ahb)
 108 {
 109         struct  ecb* ecb;
 110         int     s;
 111
 112         s = splcam();
 113         if ((ecb = SLIST_FIRST(&ahb->free_ecbs)) != NULL)
 114                 SLIST_REMOVE_HEAD(&ahb->free_ecbs, links);
 115         splx(s);
 116
 117         return (ecb);
 118 }
 119
 120 static __inline void
 121 ahbecbfree(struct ahb_softc* ahb, struct ecb* ecb)
 122 {
 123         int s;
 124
 125         s = splcam();
 126         ecb->state = ECB_FREE;
 127         SLIST_INSERT_HEAD(&ahb->free_ecbs, ecb, links);
 128         splx(s);
 129 }
 130
 131 static __inline u_int32_t
 132 ahbecbvtop(struct ahb_softc *ahb, struct ecb *ecb)
 133 {
 134         return (ahb->ecb_physbase
 135               + (u_int32_t)((caddr_t)ecb - (caddr_t)ahb->ecb_array));
 136 }
 137
 138 static __inline struct ecb*
 139 ahbecbptov(struct ahb_softc *ahb, u_int32_t ecb_addr)
 140 {
 141         return (ahb->ecb_array
 142               + ((struct ecb*)(uintptr_t)ecb_addr
 143                 - (struct ecb*)(uintptr_t)ahb->ecb_physbase));
 144 }
 145
 146 static __inline u_int32_t
 147 ahbstatuspaddr(u_int32_t ecb_paddr)
 148 {
 149         return (ecb_paddr + offsetof(struct ecb, status));
 150 }
 151
 152 static __inline u_int32_t
 153 ahbsensepaddr(u_int32_t ecb_paddr)
 154 {
 155         return (ecb_paddr + offsetof(struct ecb, sense));
 156 }
 157
 158 static __inline u_int32_t
 159 ahbsgpaddr(u_int32_t ecb_paddr)
 160 {
 161         return (ecb_paddr + offsetof(struct ecb, sg_list));
 162 }
 163
 164 static __inline void
 165 ahbqueuembox(struct ahb_softc *ahb, u_int32_t mboxval, u_int attn_code)
 166 {
 167         u_int loopmax = 300;
 168         while (--loopmax) {
 169                 u_int status;
 170
 171                 status = ahb_inb(ahb, HOSTSTAT);
 172                 if ((status & (HOSTSTAT_MBOX_EMPTY|HOSTSTAT_BUSY))
 173                    == HOSTSTAT_MBOX_EMPTY)
 174                         break;
 175                 DELAY(20);
 176         }
 177         if (loopmax == 0)
 178                 panic("ahb%ld: adapter not taking commands\n", ahb->unit);
 179
 180         ahb_outl(ahb, MBOXOUT0, mboxval);
 181         ahb_outb(ahb, ATTN, attn_code);
 182 }
 183
 184 static const char *
 185 ahbmatch(eisa_id_t type)
 186 {
 187         switch(type & 0xfffffe00) {
 188                 case EISA_DEVICE_ID_ADAPTEC_1740:
 189                         return ("Adaptec 174x SCSI host adapter");
 190                         break;
 191                 default:
 192                         break;
 193         }
 194         return (NULL);
 195 }
 196
 197 static int
 198 ahbprobe(device_t dev)
 199 {
 200         const char *desc;
 201         u_int32_t iobase;
 202         u_int32_t irq;
 203         u_int8_t  intdef;
 204         int shared;
 205
 206         desc = ahbmatch(eisa_get_id(dev));
 207         if (!desc)
 208             return (ENXIO);
 209         device_set_desc(dev, desc);
 210
 211         iobase = (eisa_get_slot(dev) * EISA_SLOT_SIZE) +
 212             AHB_EISA_SLOT_OFFSET;
 213
 214         eisa_add_iospace(dev, iobase, AHB_EISA_IOSIZE, RESVADDR_NONE);
 215
 216         intdef = inb(INTDEF + iobase);
 217         switch (intdef & 0x7) {
 218         case INT9:
 219             irq = 9;
 220             break;
 221         case INT10:
 222             irq = 10;
 223             break;
 224         case INT11:
 225             irq = 11;
 226             break;
 227         case INT12:
 228             irq = 12;
 229             break;
 230         case INT14:
 231             irq = 14;
 232             break;
 233         case INT15:
 234             irq = 15;
 235             break;
 236         default:
 237             printf("Adaptec 174X at slot %d: illegal "
 238                    "irq setting %d\n", eisa_get_slot(dev),
 239                    (intdef & 0x7));
 240             irq = 0;
 241             break;
 242         }
 243         if (irq == 0)
 244             return ENXIO;
 245
 246         shared = (inb(INTDEF + iobase) & INTLEVEL) ?
 247                  EISA_TRIGGER_LEVEL : EISA_TRIGGER_EDGE;
 248
 249         eisa_add_intr(dev, irq, shared);
 250
 251         return 0;
 252 }
 253
 254 static int
 255 ahbattach(device_t dev)
 256 {
 257         /*
 258          * find unit and check we have that many defined
 259          */
 260         struct      ahb_softc *ahb;
 261         struct      ecb* next_ecb;
 262         struct      resource *io = 0;
 263         struct      resource *irq = 0;
 264         int         rid;
 265         void        *ih;
 266
 267         rid = 0;
 268         io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
 269         if (!io) {
 270                 device_printf(dev, "No I/O space?!\n");
 271                 return ENOMEM;
 272         }
 273
 274         if ((ahb = ahballoc(dev, io)) == NULL) {
 275                 goto error_exit2;
 276         }
 277
 278         if (ahbreset(ahb) != 0)
 279                 goto error_exit;
 280
 281         rid = 0;
 282         irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
 283         if (!irq) {
 284                 device_printf(dev, "Can't allocate interrupt\n");
 285                 goto error_exit;
 286         }
 287
 288         /*
 289          * Create our DMA tags.  These tags define the kinds of device
 290          * accessible memory allocations and memory mappings we will
 291          * need to perform during normal operation.
 292          */
 293         /* DMA tag for mapping buffers into device visible space. */
 294         if (bus_dma_tag_create( /* parent       */ bus_get_dma_tag(dev),
 295                                 /* alignment    */ 1,
 296                                 /* boundary     */ 0,
 297                                 /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
 298                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 299                                 /* filter       */ NULL,
 300                                 /* filterarg    */ NULL,
 301                                 /* maxsize      */ MAXBSIZE,
 302                                 /* nsegments    */ AHB_NSEG,
 303                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 304                                 /* flags        */ BUS_DMA_ALLOCNOW,
 305                                 /* lockfunc     */ busdma_lock_mutex,
 306                                 /* lockarg      */ &Giant,
 307                                 &ahb->buffer_dmat) != 0)
 308                 goto error_exit;
 309
 310         ahb->init_level++;
 311
 312         /* DMA tag for our ccb structures and ha inquiry data */
 313         if (bus_dma_tag_create( /* parent       */ bus_get_dma_tag(dev),
 314                                 /* alignment    */ 1,
 315                                 /* boundary     */ 0,
 316                                 /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
 317                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 318                                 /* filter       */ NULL,
 319                                 /* filterarg    */ NULL,
 320                                 /* maxsize      */ (AHB_NECB *
 321                                                     sizeof(struct ecb))
 322                                                     + sizeof(*ahb->ha_inq_data),
 323                                 /* nsegments    */ 1,
 324                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 325                                 /* flags        */ 0,
 326                                 /* lockfunc     */ busdma_lock_mutex,
 327                                 /* lockarg      */ &Giant,
 328                                 &ahb->ecb_dmat) != 0)
 329                 goto error_exit;
 330
 331         ahb->init_level++;
 332
 333         /* Allocation for our ccbs */
 334         if (bus_dmamem_alloc(ahb->ecb_dmat, (void **)&ahb->ecb_array,
 335                              BUS_DMA_NOWAIT, &ahb->ecb_dmamap) != 0)
 336                 goto error_exit;
 337
 338         ahb->ha_inq_data = (struct ha_inquiry_data *)&ahb->ecb_array[AHB_NECB];
 339
 340         ahb->init_level++;
 341
 342         /* And permanently map them */
 343         bus_dmamap_load(ahb->ecb_dmat, ahb->ecb_dmamap,
 344                         ahb->ecb_array, AHB_NSEG * sizeof(struct ecb),
 345                         ahbmapecbs, ahb, /*flags*/0);
 346
 347         ahb->init_level++;
 348
 349         /* Allocate the buffer dmamaps for each of our ECBs */
 350         bzero(ahb->ecb_array, (AHB_NECB * sizeof(struct ecb))
 351               + sizeof(*ahb->ha_inq_data));
 352         next_ecb = ahb->ecb_array;
 353         while (ahb->num_ecbs < AHB_NECB) {
 354                 u_int32_t ecb_paddr;
 355
 356                 if (bus_dmamap_create(ahb->buffer_dmat, /*flags*/0,
 357                                       &next_ecb->dmamap))
 358                         break;
 359                 ecb_paddr = ahbecbvtop(ahb, next_ecb);
 360                 next_ecb->hecb.status_ptr = ahbstatuspaddr(ecb_paddr);
 361                 next_ecb->hecb.sense_ptr = ahbsensepaddr(ecb_paddr);
 362                 ahb->num_ecbs++;
 363                 ahbecbfree(ahb, next_ecb);
 364                 next_ecb++;
 365         }
 366
 367         if (ahb->num_ecbs == 0)
 368                 goto error_exit;
 369
 370         ahb->init_level++;
 371
 372         /*
 373          * Now that we know we own the resources we need, register
 374          * our bus with the XPT.
 375          */
 376         if (ahbxptattach(ahb))
 377                 goto error_exit;
 378
 379         /* Enable our interrupt */
 380         if (bus_setup_intr(dev, irq, INTR_TYPE_CAM|INTR_ENTROPY, NULL, ahbintr,
 381             ahb, &ih) != 0)
 382                 goto error_exit;
 383
 384         return (0);
 385
 386 error_exit:
 387         /*
 388          * The board's IRQ line will not be left enabled
 389          * if we can't intialize correctly, so its safe
 390          * to release the irq.
 391          */
 392         ahbfree(ahb);
 393 error_exit2:
 394         if (io)
 395                 bus_release_resource(dev, SYS_RES_IOPORT, 0, io);
 396         if (irq)
 397                 bus_release_resource(dev, SYS_RES_IRQ, 0, irq);
 398         return (-1);
 399 }
 400
 401 static struct ahb_softc *
 402 ahballoc(device_t dev, struct resource *res)
 403 {
 404         struct  ahb_softc *ahb;
 405
 406         /*
 407          * Allocate a storage area for us
 408          */
 409         ahb = malloc(sizeof(struct ahb_softc), M_DEVBUF, M_NOWAIT | M_ZERO);
 410         if (!ahb) {
 411                 device_printf(dev, "cannot malloc!\n");
 412                 return (NULL);
 413         }
 414         SLIST_INIT(&ahb->free_ecbs);
 415         LIST_INIT(&ahb->pending_ccbs);
 416         ahb->unit = device_get_unit(dev);
 417         ahb->tag = rman_get_bustag(res);
 418         ahb->bsh = rman_get_bushandle(res);
 419         ahb->disc_permitted = ~0;
 420         ahb->tags_permitted = ~0;
 421         ahb->dev = dev;
 422
 423         return (ahb);
 424 }
 425
 426 static void
 427 ahbfree(struct ahb_softc *ahb)
 428 {
 429         switch (ahb->init_level) {
 430         default:
 431         case 4:
 432                 bus_dmamap_unload(ahb->ecb_dmat, ahb->ecb_dmamap);
 433         case 3:
 434                 bus_dmamem_free(ahb->ecb_dmat, ahb->ecb_array,
 435                                 ahb->ecb_dmamap);
 436                 bus_dmamap_destroy(ahb->ecb_dmat, ahb->ecb_dmamap);
 437         case 2:
 438                 bus_dma_tag_destroy(ahb->ecb_dmat);
 439         case 1:
 440                 bus_dma_tag_destroy(ahb->buffer_dmat);
 441         case 0:
 442                 break;
 443         }
 444         free(ahb, M_DEVBUF);
 445 }
 446
 447 /*
 448  * reset board, If it doesn't respond, return failure
 449  */
 450 static int
 451 ahbreset(struct ahb_softc *ahb)
 452 {
 453         int     wait = 1000;    /* 1 sec enough? */
 454         int     test;
 455
 456         if ((ahb_inb(ahb, PORTADDR) & PORTADDR_ENHANCED) == 0) {
 457                 printf("ahb_reset: Controller not in enhanced mode\n");
 458                 return (-1);
 459         }
 460
 461         ahb_outb(ahb, CONTROL, CNTRL_HARD_RST);
 462         DELAY(1000);
 463         ahb_outb(ahb, CONTROL, 0);
 464         while (--wait) {
 465                 DELAY(1000);
 466                 if ((ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_BUSY) == 0)
 467                         break;
 468         }
 469
 470         if (wait == 0) {
 471                 printf("ahbreset: No answer from aha1742 board\n");
 472                 return (-1);
 473         }
 474         if ((test = ahb_inb(ahb, MBOXIN0)) != 0) {
 475                 printf("ahb_reset: self test failed, val = 0x%x\n", test);
 476                 return (-1);
 477         }
 478         while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
 479                 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
 480                 DELAY(10000);
 481         }
 482         return (0);
 483 }
 484
 485 static void
 486 ahbmapecbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 487 {
 488         struct ahb_softc* ahb;
 489
 490         ahb = (struct ahb_softc*)arg;
 491         ahb->ecb_physbase = segs->ds_addr;
 492         /*
 493          * Space for adapter inquiry information is on the
 494          * tail of the ecb array.
 495          */
 496         ahb->ha_inq_physbase = ahbecbvtop(ahb, &ahb->ecb_array[AHB_NECB]);
 497 }
 498
 499 static int
 500 ahbxptattach(struct ahb_softc *ahb)
 501 {
 502         struct cam_devq *devq;
 503         struct ecb *ecb;
 504         u_int  i;
 505
 506         /* Remeber who are we on the scsi bus */
 507         ahb->scsi_id = ahb_inb(ahb, SCSIDEF) & HSCSIID;
 508
 509         /* Use extended translation?? */
 510         ahb->extended_trans = ahb_inb(ahb, RESV1) & EXTENDED_TRANS;
 511
 512         /* Fetch adapter inquiry data */
 513         ecb = ahbecbget(ahb);   /* Always succeeds - no outstanding commands */
 514         ecb->hecb.opcode = ECBOP_READ_HA_INQDATA;
 515         ecb->hecb.flag_word1 = FW1_SUPPRESS_URUN_ERR|FW1_ERR_STATUS_BLK_ONLY;
 516         ecb->hecb.data_ptr = ahb->ha_inq_physbase;
 517         ecb->hecb.data_len = sizeof(struct ha_inquiry_data);
 518         ecb->hecb.sense_ptr = 0;
 519         ecb->state = ECB_ACTIVE;
 520
 521         /* Tell the adapter about this command */
 522         ahbqueuembox(ahb, ahbecbvtop(ahb, ecb),
 523                      ATTN_STARTECB|ahb->scsi_id);
 524
 525         /* Poll for interrupt completion */
 526         for (i = 1000; ecb->state != ECB_FREE && i != 0; i--) {
 527                 ahbintr(ahb);
 528                 DELAY(1000);
 529         }
 530
 531         ahb->num_ecbs = MIN(ahb->num_ecbs,
 532                             ahb->ha_inq_data->scsi_data.spc2_flags);
 533         printf("ahb%ld: %.8s %s SCSI Adapter, FW Rev. %.4s, ID=%d, %d ECBs\n",
 534                ahb->unit, ahb->ha_inq_data->scsi_data.product,
 535                (ahb->ha_inq_data->scsi_data.flags & 0x4) ? "Differential"
 536                                                          : "Single Ended",
 537                ahb->ha_inq_data->scsi_data.revision,
 538                ahb->scsi_id, ahb->num_ecbs);
 539
 540         /* Restore sense paddr for future CCB clients */
 541         ecb->hecb.sense_ptr = ahbsensepaddr(ahbecbvtop(ahb, ecb));
 542
 543         ahbecbfree(ahb, ecb);
 544
 545         /*
 546          * Create the device queue for our SIM.
 547          */
 548         devq = cam_simq_alloc(ahb->num_ecbs);
 549         if (devq == NULL)
 550                 return (ENOMEM);
 551
 552         /*
 553          * Construct our SIM entry
 554          */
 555         ahb->sim = cam_sim_alloc(ahbaction, ahbpoll, "ahb", ahb, ahb->unit,
 556                                  &Giant, 2, ahb->num_ecbs, devq);
 557         if (ahb->sim == NULL) {
 558                 cam_simq_free(devq);
 559                 return (ENOMEM);
 560         }
 561
 562         if (xpt_bus_register(ahb->sim, ahb->dev, 0) != CAM_SUCCESS) {
 563                 cam_sim_free(ahb->sim, /*free_devq*/TRUE);
 564                 return (ENXIO);
 565         }
 566
 567         if (xpt_create_path(&ahb->path, /*periph*/NULL,
 568                             cam_sim_path(ahb->sim), CAM_TARGET_WILDCARD,
 569                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 570                 xpt_bus_deregister(cam_sim_path(ahb->sim));
 571                 cam_sim_free(ahb->sim, /*free_devq*/TRUE);
 572                 return (ENXIO);
 573         }
 574
 575         /*
 576          * Allow the board to generate interrupts.
 577          */
 578         ahb_outb(ahb, INTDEF, ahb_inb(ahb, INTDEF) | INTEN);
 579
 580         return (0);
 581 }
 582
 583 static void
 584 ahbhandleimmed(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
 585 {
 586         struct ccb_hdr *ccb_h;
 587         u_int target_id;
 588
 589         if (ahb->immed_cmd == 0) {
 590                 printf("ahb%ld: Immediate Command complete with no "
 591                        " pending command\n", ahb->unit);
 592                 return;
 593         }
 594
 595         target_id = intstat & INTSTAT_TARGET_MASK;
 596
 597         ccb_h = LIST_FIRST(&ahb->pending_ccbs);
 598         while (ccb_h != NULL) {
 599                 struct ecb *pending_ecb;
 600                 union ccb *ccb;
 601
 602                 pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
 603                 ccb = pending_ecb->ccb;
 604                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 605                 if (ccb->ccb_h.target_id == target_id
 606                  || target_id == ahb->scsi_id) {
 607                         untimeout(ahbtimeout, pending_ecb,
 608                                   ccb->ccb_h.timeout_ch);
 609                         LIST_REMOVE(&ccb->ccb_h, sim_links.le);
 610                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 611                                 bus_dmamap_unload(ahb->buffer_dmat,
 612                                                   pending_ecb->dmamap);
 613                         if (pending_ecb == ahb->immed_ecb)
 614                                 ccb->ccb_h.status =
 615                                     CAM_CMD_TIMEOUT|CAM_RELEASE_SIMQ;
 616                         else if (target_id == ahb->scsi_id)
 617                                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 618                         else
 619                                 ccb->ccb_h.status = CAM_BDR_SENT;
 620                         ahbecbfree(ahb, pending_ecb);
 621                         xpt_done(ccb);
 622                 } else if (ahb->immed_ecb != NULL) {
 623                         /* Re-instate timeout */
 624                         ccb->ccb_h.timeout_ch =
 625                             timeout(ahbtimeout, (caddr_t)pending_ecb,
 626                                     (ccb->ccb_h.timeout * hz) / 1000);
 627                 }
 628         }
 629
 630         if (ahb->immed_ecb != NULL) {
 631                 ahb->immed_ecb = NULL;
 632                 printf("ahb%ld: No longer in timeout\n", ahb->unit);
 633         } else if (target_id == ahb->scsi_id)
 634                 printf("ahb%ld: SCSI Bus Reset Delivered\n", ahb->unit);
 635         else
 636                 printf("ahb%ld:  Bus Device Reset Delibered to target %d\n",
 637                        ahb->unit, target_id);
 638
 639         ahb->immed_cmd = 0;
 640 }
 641
 642 static void
 643 ahbcalcresid(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
 644 {
 645         if (ecb->status.data_overrun != 0) {
 646                 /*
 647                  * Overrun Condition.  The hardware doesn't
 648                  * provide a meaningful byte count in this case
 649                  * (the residual is always 0).  Tell the XPT
 650                  * layer about the error.
 651                  */
 652                 ccb->ccb_h.status = CAM_DATA_RUN_ERR;
 653         } else {
 654                 ccb->csio.resid = ecb->status.resid_count;
 655
 656                 if ((ecb->hecb.flag_word1 & FW1_SG_ECB) != 0) {
 657                         /*
 658                          * For S/G transfers, the adapter provides a pointer
 659                          * to the address in the last S/G element used and a
 660                          * residual for that element.  So, we need to sum up
 661                          * the elements that follow it in order to get a real
 662                          * residual number.  If we have an overrun, the residual
 663                          * reported will be 0 and we already know that all S/G
 664                          * segments have been exhausted, so we can skip this
 665                          * step.
 666                          */
 667                         ahb_sg_t *sg;
 668                         int       num_sg;
 669
 670                         num_sg = ecb->hecb.data_len / sizeof(ahb_sg_t);
 671
 672                         /* Find the S/G the adapter was working on */
 673                         for (sg = ecb->sg_list;
 674                              num_sg != 0 && sg->addr != ecb->status.resid_addr;
 675                              num_sg--, sg++)
 676                                 ;
 677
 678                         /* Skip it */
 679                         num_sg--;
 680                         sg++;
 681
 682                         /* Sum the rest */
 683                         for (; num_sg != 0; num_sg--, sg++)
 684                                 ccb->csio.resid += sg->len;
 685                 }
 686                 /* Underruns are not errors */
 687                 ccb->ccb_h.status = CAM_REQ_CMP;
 688         }
 689 }
 690
 691 static void
 692 ahbprocesserror(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
 693 {
 694         struct hardware_ecb *hecb;
 695         struct ecb_status *status;
 696
 697         hecb = &ecb->hecb;
 698         status = &ecb->status;
 699         switch (status->ha_status) {
 700         case HS_OK:
 701                 ccb->csio.scsi_status = status->scsi_status;
 702                 if (status->scsi_status != 0) {
 703                         ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 704                         if (status->sense_stored) {
 705                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 706                                 ccb->csio.sense_resid =
 707                                     ccb->csio.sense_len - status->sense_len;
 708                                 bcopy(&ecb->sense, &ccb->csio.sense_data,
 709                                       status->sense_len);
 710                         }
 711                 }
 712                 break;
 713         case HS_TARGET_NOT_ASSIGNED:
 714                 ccb->ccb_h.status = CAM_PATH_INVALID;
 715                 break;
 716         case HS_SEL_TIMEOUT:
 717                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
 718                 break;
 719         case HS_DATA_RUN_ERR:
 720                 ahbcalcresid(ahb, ecb, ccb);
 721                 break;
 722         case HS_UNEXPECTED_BUSFREE:
 723                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
 724                 break;
 725         case HS_INVALID_PHASE:
 726                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
 727                 break;
 728         case HS_REQUEST_SENSE_FAILED:
 729                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
 730                 break;
 731         case HS_TAG_MSG_REJECTED:
 732         {
 733                 struct ccb_trans_settings neg;
 734                 struct ccb_trans_settings_scsi *scsi = &neg.proto_specific.scsi;
 735
 736                 xpt_print_path(ccb->ccb_h.path);
 737                 printf("refuses tagged commands.  Performing "
 738                        "non-tagged I/O\n");
 739                 memset(&neg, 0, sizeof (neg));
 740                 neg.protocol = PROTO_SCSI;
 741                 neg.protocol_version = SCSI_REV_2;
 742                 neg.transport = XPORT_SPI;
 743                 neg.transport_version = 2;
 744                 scsi->flags = CTS_SCSI_VALID_TQ;
 745                 xpt_setup_ccb(&neg.ccb_h, ccb->ccb_h.path, /*priority*/1);
 746                 xpt_async(AC_TRANSFER_NEG, ccb->ccb_h.path, &neg);
 747                 ahb->tags_permitted &= ~(0x01 << ccb->ccb_h.target_id);
 748                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
 749                 break;
 750         }
 751         case HS_FIRMWARE_LOAD_REQ:
 752         case HS_HARDWARE_ERR:
 753                 /*
 754                  * Tell the system that the Adapter
 755                  * is no longer functional.
 756                  */
 757                 ccb->ccb_h.status = CAM_NO_HBA;
 758                 break;
 759         case HS_CMD_ABORTED_HOST:
 760         case HS_CMD_ABORTED_ADAPTER:
 761         case HS_ATN_TARGET_FAILED:
 762         case HS_SCSI_RESET_ADAPTER:
 763         case HS_SCSI_RESET_INCOMING:
 764                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 765                 break;
 766         case HS_INVALID_ECB_PARAM:
 767                 printf("ahb%ld: opcode 0x%02x, flag_word1 0x%02x, flag_word2 0x%02x\n",
 768                         ahb->unit, hecb->opcode, hecb->flag_word1, hecb->flag_word2);
 769                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 770                 break;
 771         case HS_DUP_TCB_RECEIVED:
 772         case HS_INVALID_OPCODE:
 773         case HS_INVALID_CMD_LINK:
 774         case HS_PROGRAM_CKSUM_ERROR:
 775                 panic("ahb%ld: Can't happen host status %x occurred",
 776                       ahb->unit, status->ha_status);
 777                 break;
 778         }
 779         if (ccb->ccb_h.status != CAM_REQ_CMP) {
 780                 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 781                 ccb->ccb_h.status |= CAM_DEV_QFRZN;
 782         }
 783 }
 784
 785 static void
 786 ahbdone(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
 787 {
 788         struct ecb *ecb;
 789         union ccb *ccb;
 790
 791         ecb = ahbecbptov(ahb, mbox);
 792
 793         if ((ecb->state & ECB_ACTIVE) == 0)
 794                 panic("ecb not active");
 795
 796         ccb = ecb->ccb;
 797
 798         if (ccb != NULL) {
 799                 untimeout(ahbtimeout, ecb, ccb->ccb_h.timeout_ch);
 800                 LIST_REMOVE(&ccb->ccb_h, sim_links.le);
 801
 802                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 803                         bus_dmasync_op_t op;
 804
 805                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 806                                 op = BUS_DMASYNC_POSTREAD;
 807                         else
 808                                 op = BUS_DMASYNC_POSTWRITE;
 809                         bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
 810                         bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
 811                 }
 812
 813                 if ((intstat & INTSTAT_MASK) == INTSTAT_ECB_OK) {
 814                         ccb->ccb_h.status = CAM_REQ_CMP;
 815                         ccb->csio.resid = 0;
 816                 } else {
 817                         ahbprocesserror(ahb, ecb, ccb);
 818                 }
 819                 ahbecbfree(ahb, ecb);
 820                 xpt_done(ccb);
 821         } else {
 822                 /* Non CCB Command */
 823                 if ((intstat & INTSTAT_MASK) != INTSTAT_ECB_OK) {
 824                         printf("ahb%ld: Command 0%x Failed %x:%x:%x\n",
 825                                ahb->unit, ecb->hecb.opcode,
 826                                *((u_int16_t*)&ecb->status),
 827                                ecb->status.ha_status, ecb->status.resid_count);
 828                 }
 829                 /* Client owns this ECB and will release it. */
 830         }
 831 }
 832
 833 /*
 834  * Catch an interrupt from the adaptor
 835  */
 836 static void
 837 ahbintr(void *arg)
 838 {
 839         struct    ahb_softc *ahb;
 840         u_int     intstat;
 841         u_int32_t mbox;
 842
 843         ahb = (struct ahb_softc *)arg;
 844
 845         while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
 846                 /*
 847                  * Fetch information about this interrupt.
 848                  */
 849                 intstat = ahb_inb(ahb, INTSTAT);
 850                 mbox = ahb_inl(ahb, MBOXIN0);
 851
 852                 /*
 853                  * Reset interrupt latch.
 854                  */
 855                 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
 856
 857                 /*
 858                  * Process the completed operation
 859                  */
 860                 switch (intstat & INTSTAT_MASK) {
 861                 case INTSTAT_ECB_OK:
 862                 case INTSTAT_ECB_CMPWRETRY:
 863                 case INTSTAT_ECB_CMPWERR:
 864                         ahbdone(ahb, mbox, intstat);
 865                         break;
 866                 case INTSTAT_AEN_OCCURED:
 867                         if ((intstat & INTSTAT_TARGET_MASK) == ahb->scsi_id) {
 868                                 /* Bus Reset */
 869                                 xpt_print_path(ahb->path);
 870                                 switch (mbox) {
 871                                 case HS_SCSI_RESET_ADAPTER:
 872                                         printf("Host Adapter Initiated "
 873                                                "Bus Reset occurred\n");
 874                                         break;
 875                                 case HS_SCSI_RESET_INCOMING:
 876                                         printf("Bus Reset Initiated "
 877                                                "by another device occurred\n");
 878                                         break;
 879                                 }
 880                                 /* Notify the XPT */
 881                                 xpt_async(AC_BUS_RESET, ahb->path, NULL);
 882                                 break;
 883                         }
 884                         printf("Unsupported initiator selection AEN occured\n");
 885                         break;
 886                 case INTSTAT_IMMED_OK:
 887                 case INTSTAT_IMMED_ERR:
 888                         ahbhandleimmed(ahb, mbox, intstat);
 889                         break;
 890                 case INTSTAT_HW_ERR:
 891                         panic("Unrecoverable hardware Error Occurred\n");
 892                 }
 893         }
 894 }
 895
 896 static void
 897 ahbexecuteecb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 898 {
 899         struct    ecb *ecb;
 900         union     ccb *ccb;
 901         struct    ahb_softc *ahb;
 902         u_int32_t ecb_paddr;
 903         int       s;
 904
 905         ecb = (struct ecb *)arg;
 906         ccb = ecb->ccb;
 907         ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
 908
 909         if (error != 0) {
 910                 if (error != EFBIG)
 911                         printf("ahb%ld: Unexepected error 0x%x returned from "
 912                                "bus_dmamap_load\n", ahb->unit, error);
 913                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 914                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 915                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 916                 }
 917                 ahbecbfree(ahb, ecb);
 918                 xpt_done(ccb);
 919                 return;
 920         }
 921
 922         ecb_paddr = ahbecbvtop(ahb, ecb);
 923
 924         if (nseg != 0) {
 925                 ahb_sg_t *sg;
 926                 bus_dma_segment_t *end_seg;
 927                 bus_dmasync_op_t op;
 928
 929                 end_seg = dm_segs + nseg;
 930
 931                 /* Copy the segments into our SG list */
 932                 sg = ecb->sg_list;
 933                 while (dm_segs < end_seg) {
 934                         sg->addr = dm_segs->ds_addr;
 935                         sg->len = dm_segs->ds_len;
 936                         sg++;
 937                         dm_segs++;
 938                 }
 939
 940                 if (nseg > 1) {
 941                         ecb->hecb.flag_word1 |= FW1_SG_ECB;
 942                         ecb->hecb.data_ptr = ahbsgpaddr(ecb_paddr);
 943                         ecb->hecb.data_len = sizeof(ahb_sg_t) * nseg;
 944                 } else {
 945                         ecb->hecb.data_ptr = ecb->sg_list->addr;
 946                         ecb->hecb.data_len = ecb->sg_list->len;
 947                 }
 948
 949                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
 950 /*                      ecb->hecb.flag_word2 |= FW2_DATA_DIR_IN; */
 951                         op = BUS_DMASYNC_PREREAD;
 952                 } else {
 953                         op = BUS_DMASYNC_PREWRITE;
 954                 }
 955                 /* ecb->hecb.flag_word2 |= FW2_CHECK_DATA_DIR; */
 956
 957                 bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
 958
 959         } else {
 960                 ecb->hecb.data_ptr = 0;
 961                 ecb->hecb.data_len = 0;
 962         }
 963
 964         s = splcam();
 965
 966         /*
 967          * Last time we need to check if this CCB needs to
 968          * be aborted.
 969          */
 970         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 971                 if (nseg != 0)
 972                         bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
 973                 ahbecbfree(ahb, ecb);
 974                 xpt_done(ccb);
 975                 splx(s);
 976                 return;
 977         }
 978
 979         ecb->state = ECB_ACTIVE;
 980         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 981         LIST_INSERT_HEAD(&ahb->pending_ccbs, &ccb->ccb_h, sim_links.le);
 982
 983         /* Tell the adapter about this command */
 984         ahbqueuembox(ahb, ecb_paddr, ATTN_STARTECB|ccb->ccb_h.target_id);
 985
 986         ccb->ccb_h.timeout_ch = timeout(ahbtimeout, (caddr_t)ecb,
 987                                         (ccb->ccb_h.timeout * hz) / 1000);
 988         splx(s);
 989 }
 990
 991 static void
 992 ahbaction(struct cam_sim *sim, union ccb *ccb)
 993 {
 994         struct  ahb_softc *ahb;
 995
 996         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahbaction\n"));
 997
 998         ahb = (struct ahb_softc *)cam_sim_softc(sim);
 999
1000         switch (ccb->ccb_h.func_code) {
1001         /* Common cases first */
1002         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
1003         {
1004                 struct ecb *ecb;
1005                 struct hardware_ecb *hecb;
1006
1007                 /*
1008                  * get an ecb to use.
1009                  */
1010                 if ((ecb = ahbecbget(ahb)) == NULL) {
1011                         /* Should never occur */
1012                         panic("Failed to get an ecb");
1013                 }
1014
1015                 /*
1016                  * So we can find the ECB when an abort is requested
1017                  */
1018                 ecb->ccb = ccb;
1019                 ccb->ccb_h.ccb_ecb_ptr = ecb;
1020                 ccb->ccb_h.ccb_ahb_ptr = ahb;
1021
1022                 /*
1023                  * Put all the arguments for the xfer in the ecb
1024                  */
1025                 hecb = &ecb->hecb;
1026                 hecb->opcode = ECBOP_INITIATOR_SCSI_CMD;
1027                 hecb->flag_word1 = FW1_AUTO_REQUEST_SENSE
1028                                  | FW1_ERR_STATUS_BLK_ONLY;
1029                 hecb->flag_word2 = ccb->ccb_h.target_lun
1030                                  | FW2_NO_RETRY_ON_BUSY;
1031                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
1032                         hecb->flag_word2 |= FW2_TAG_ENB
1033                                          | ((ccb->csio.tag_action & 0x3)
1034                                             << FW2_TAG_TYPE_SHIFT);
1035                 }
1036                 if ((ccb->ccb_h.flags & CAM_DIS_DISCONNECT) != 0)
1037                         hecb->flag_word2 |= FW2_DISABLE_DISC;
1038                 hecb->sense_len = ccb->csio.sense_len;
1039                 hecb->cdb_len = ccb->csio.cdb_len;
1040                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
1041                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
1042                                 bcopy(ccb->csio.cdb_io.cdb_ptr,
1043                                       hecb->cdb, hecb->cdb_len);
1044                         } else {
1045                                 /* I guess I could map it in... */
1046                                 ccb->ccb_h.status = CAM_REQ_INVALID;
1047                                 ahbecbfree(ahb, ecb);
1048                                 xpt_done(ccb);
1049                                 return;
1050                         }
1051                 } else {
1052                         bcopy(ccb->csio.cdb_io.cdb_bytes,
1053                               hecb->cdb, hecb->cdb_len);
1054                 }
1055
1056                 /*
1057                  * If we have any data to send with this command,
1058                  * map it into bus space.
1059                  */
1060                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1061                         if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
1062                                 /*
1063                                  * We've been given a pointer
1064                                  * to a single buffer.
1065                                  */
1066                                 if ((ccb->ccb_h.flags & CAM_DATA_PHYS)==0) {
1067                                         int s;
1068                                         int error;
1069
1070                                         s = splsoftvm();
1071                                         error = bus_dmamap_load(
1072                                             ahb->buffer_dmat,
1073                                             ecb->dmamap,
1074                                             ccb->csio.data_ptr,
1075                                             ccb->csio.dxfer_len,
1076                                             ahbexecuteecb,
1077                                             ecb, /*flags*/0);
1078                                         if (error == EINPROGRESS) {
1079                                                 /*
1080                                                  * So as to maintain ordering,
1081                                                  * freeze the controller queue
1082                                                  * until our mapping is
1083                                                  * returned.
1084                                                  */
1085                                                 xpt_freeze_simq(ahb->sim, 1);
1086                                                 ccb->ccb_h.status |=
1087                                                     CAM_RELEASE_SIMQ;
1088                                         }
1089                                         splx(s);
1090                                 } else {
1091                                         struct bus_dma_segment seg;
1092
1093                                         /* Pointer to physical buffer */
1094                                         seg.ds_addr =
1095                                             (bus_addr_t)ccb->csio.data_ptr;
1096                                         seg.ds_len = ccb->csio.dxfer_len;
1097                                         ahbexecuteecb(ecb, &seg, 1, 0);
1098                                 }
1099                         } else {
1100                                 struct bus_dma_segment *segs;
1101
1102                                 if ((ccb->ccb_h.flags & CAM_DATA_PHYS) != 0)
1103                                         panic("ahbaction - Physical segment "
1104                                               "pointers unsupported");
1105
1106                                 if ((ccb->ccb_h.flags & CAM_SG_LIST_PHYS) == 0)
1107                                         panic("btaction - Virtual segment "
1108                                               "addresses unsupported");
1109
1110                                 /* Just use the segments provided */
1111                                 segs = (struct bus_dma_segment *)
1112                                     ccb->csio.data_ptr;
1113                                 ahbexecuteecb(ecb, segs, ccb->csio.sglist_cnt,
1114                                              0);
1115                         }
1116                 } else {
1117                         ahbexecuteecb(ecb, NULL, 0, 0);
1118                 }
1119                 break;
1120         }
1121         case XPT_EN_LUN:                /* Enable LUN as a target */
1122         case XPT_TARGET_IO:             /* Execute target I/O request */
1123         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
1124         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
1125         case XPT_ABORT:                 /* Abort the specified CCB */
1126                 /* XXX Implement */
1127                 ccb->ccb_h.status = CAM_REQ_INVALID;
1128                 xpt_done(ccb);
1129                 break;
1130         case XPT_SET_TRAN_SETTINGS:
1131         {
1132                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1133                 xpt_done(ccb);
1134                 break;
1135         }
1136         case XPT_GET_TRAN_SETTINGS:
1137         /* Get default/user set transfer settings for the target */
1138         {
1139                 struct  ccb_trans_settings *cts = &ccb->cts;
1140                 u_int   target_mask = 0x01 << ccb->ccb_h.target_id;
1141                 struct ccb_trans_settings_scsi *scsi =
1142                     &cts->proto_specific.scsi;
1143                 struct ccb_trans_settings_spi *spi =
1144                     &cts->xport_specific.spi;
1145
1146                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
1147                         cts->protocol = PROTO_SCSI;
1148                         cts->protocol_version = SCSI_REV_2;
1149                         cts->transport = XPORT_SPI;
1150                         cts->transport_version = 2;
1151
1152                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
1153                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
1154                         if ((ahb->disc_permitted & target_mask) != 0)
1155                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
1156                         if ((ahb->tags_permitted & target_mask) != 0)
1157                                 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
1158                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1159                         spi->sync_period = 25; /* 10MHz */
1160
1161                         if (spi->sync_period != 0)
1162                                 spi->sync_offset = 15;
1163
1164                         spi->valid = CTS_SPI_VALID_SYNC_RATE
1165                                    | CTS_SPI_VALID_SYNC_OFFSET
1166                                    | CTS_SPI_VALID_BUS_WIDTH
1167                                    | CTS_SPI_VALID_DISC;
1168                         scsi->valid = CTS_SCSI_VALID_TQ;
1169                         ccb->ccb_h.status = CAM_REQ_CMP;
1170                 } else {
1171                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1172                 }
1173                 xpt_done(ccb);
1174                 break;
1175         }
1176         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
1177         {
1178                 int i;
1179                 int s;
1180
1181                 s = splcam();
1182                 ahb->immed_cmd = IMMED_RESET;
1183                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1184                 /* Poll for interrupt completion */
1185                 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--) {
1186                         DELAY(1000);
1187                         ahbintr(cam_sim_softc(sim));
1188                 }
1189                 splx(s);
1190                 break;
1191         }
1192         case XPT_CALC_GEOMETRY:
1193         {
1194                 cam_calc_geometry(&ccb->ccg, ahb->extended_trans);
1195                 xpt_done(ccb);
1196                 break;
1197         }
1198         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1199         {
1200                 int i;
1201
1202                 ahb->immed_cmd = IMMED_RESET;
1203                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1204                 /* Poll for interrupt completion */
1205                 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--)
1206                         DELAY(1000);
1207                 ccb->ccb_h.status = CAM_REQ_CMP;
1208                 xpt_done(ccb);
1209                 break;
1210         }
1211         case XPT_TERM_IO:               /* Terminate the I/O process */
1212                 /* XXX Implement */
1213                 ccb->ccb_h.status = CAM_REQ_INVALID;
1214                 xpt_done(ccb);
1215                 break;
1216         case XPT_PATH_INQ:              /* Path routing inquiry */
1217         {
1218                 struct ccb_pathinq *cpi = &ccb->cpi;
1219
1220                 cpi->version_num = 1; /* XXX??? */
1221                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1222                 cpi->target_sprt = 0;
1223                 cpi->hba_misc = 0;
1224                 cpi->hba_eng_cnt = 0;
1225                 cpi->max_target = 7;
1226                 cpi->max_lun = 7;
1227                 cpi->initiator_id = ahb->scsi_id;
1228                 cpi->bus_id = cam_sim_bus(sim);
1229                 cpi->base_transfer_speed = 3300;
1230                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1231                 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
1232                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1233                 cpi->unit_number = cam_sim_unit(sim);
1234                 cpi->transport = XPORT_SPI;
1235                 cpi->transport_version = 2;
1236                 cpi->protocol = PROTO_SCSI;
1237                 cpi->protocol_version = SCSI_REV_2;
1238                 cpi->ccb_h.status = CAM_REQ_CMP;
1239                 xpt_done(ccb);
1240                 break;
1241         }
1242 #if 0
1243         /* Need these??? */
1244         case XPT_IMMED_NOTIFY:          /* Notify Host Target driver of event */
1245         case XPT_NOTIFY_ACK:            /* Acknowledgement of event */
1246 #endif
1247         default:
1248                 ccb->ccb_h.status = CAM_REQ_INVALID;
1249                 xpt_done(ccb);
1250                 break;
1251         }
1252 }
1253
1254 static void
1255 ahbpoll(struct cam_sim *sim)
1256 {
1257         ahbintr(cam_sim_softc(sim));
1258 }
1259
1260 static void
1261 ahbtimeout(void *arg)
1262 {
1263         struct ecb       *ecb;
1264         union  ccb       *ccb;
1265         struct ahb_softc *ahb;
1266         int               s;
1267
1268         ecb = (struct ecb *)arg;
1269         ccb = ecb->ccb;
1270         ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
1271         xpt_print_path(ccb->ccb_h.path);
1272         printf("ECB %p - timed out\n", (void *)ecb);
1273
1274         s = splcam();
1275
1276         if ((ecb->state & ECB_ACTIVE) == 0) {
1277                 xpt_print_path(ccb->ccb_h.path);
1278                 printf("ECB %p - timed out ECB already completed\n",
1279                        (void *)ecb);
1280                 splx(s);
1281                 return;
1282         }
1283         /*
1284          * In order to simplify the recovery process, we ask the XPT
1285          * layer to halt the queue of new transactions and we traverse
1286          * the list of pending CCBs and remove their timeouts. This
1287          * means that the driver attempts to clear only one error
1288          * condition at a time.  In general, timeouts that occur
1289          * close together are related anyway, so there is no benefit
1290          * in attempting to handle errors in parrallel.  Timeouts will
1291          * be reinstated when the recovery process ends.
1292          */
1293         if ((ecb->state & ECB_DEVICE_RESET) == 0) {
1294                 struct ccb_hdr *ccb_h;
1295
1296                 if ((ecb->state & ECB_RELEASE_SIMQ) == 0) {
1297                         xpt_freeze_simq(ahb->sim, /*count*/1);
1298                         ecb->state |= ECB_RELEASE_SIMQ;
1299                 }
1300
1301                 ccb_h = LIST_FIRST(&ahb->pending_ccbs);
1302                 while (ccb_h != NULL) {
1303                         struct ecb *pending_ecb;
1304
1305                         pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
1306                         untimeout(ahbtimeout, pending_ecb, ccb_h->timeout_ch);
1307                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1308                 }
1309
1310                 /* Store for our interrupt handler */
1311                 ahb->immed_ecb = ecb;
1312
1313                 /*
1314                  * Send a Bus Device Reset message:
1315                  * The target that is holding up the bus may not
1316                  * be the same as the one that triggered this timeout
1317                  * (different commands have different timeout lengths),
1318                  * but we have no way of determining this from our
1319                  * timeout handler.  Our strategy here is to queue a
1320                  * BDR message to the target of the timed out command.
1321                  * If this fails, we'll get another timeout 2 seconds
1322                  * later which will attempt a bus reset.
1323                  */
1324                 xpt_print_path(ccb->ccb_h.path);
1325                 printf("Queuing BDR\n");
1326                 ecb->state |= ECB_DEVICE_RESET;
1327                 ccb->ccb_h.timeout_ch =
1328                     timeout(ahbtimeout, (caddr_t)ecb, 2 * hz);
1329
1330                 ahb->immed_cmd = IMMED_RESET;
1331                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1332         } else if ((ecb->state & ECB_SCSIBUS_RESET) != 0) {
1333                 /*
1334                  * Try a SCSI bus reset.  We do this only if we
1335                  * have already attempted to clear the condition with a BDR.
1336                  */
1337                 xpt_print_path(ccb->ccb_h.path);
1338                 printf("Attempting SCSI Bus reset\n");
1339                 ecb->state |= ECB_SCSIBUS_RESET;
1340                 ccb->ccb_h.timeout_ch =
1341                     timeout(ahbtimeout, (caddr_t)ecb, 2 * hz);
1342                 ahb->immed_cmd = IMMED_RESET;
1343                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1344         } else {
1345                 /* Bring out the hammer... */
1346                 ahbreset(ahb);
1347
1348                 /* Simulate the reset complete interrupt */
1349                 ahbhandleimmed(ahb, 0, ahb->scsi_id|INTSTAT_IMMED_OK);
1350         }
1351
1352         splx(s);
1353 }
1354
1355 static device_method_t ahb_eisa_methods[] = {
1356         /* Device interface */
1357         DEVMETHOD(device_probe,         ahbprobe),
1358         DEVMETHOD(device_attach,        ahbattach),
1359
1360         { 0, 0 }
1361 };
1362
1363 static driver_t ahb_eisa_driver = {
1364         "ahb",
1365         ahb_eisa_methods,
1366         1,                      /* unused */
1367 };
1368
1369 static devclass_t ahb_devclass;
1370
1371 DRIVER_MODULE(ahb, eisa, ahb_eisa_driver, ahb_devclass, 0, 0);
1372 MODULE_DEPEND(ahb, eisa, 1, 1, 1);
1373 MODULE_DEPEND(ahb, cam, 1, 1, 1);