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/conf.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/malloc.h>
  36 #include <sys/module.h>
  37 #include <sys/lock.h>
  38 #include <sys/mutex.h>
  39 #include <sys/bus.h>
  40
  41 #include <machine/bus.h>
  42 #include <machine/resource.h>
  43 #include <sys/rman.h>
  44
  45 #include <cam/cam.h>
  46 #include <cam/cam_ccb.h>
  47 #include <cam/cam_sim.h>
  48 #include <cam/cam_xpt_sim.h>
  49 #include <cam/cam_debug.h>
  50
  51 #include <cam/scsi/scsi_message.h>
  52
  53 #include <dev/eisa/eisaconf.h>
  54
  55 #include <dev/ahb/ahbreg.h>
  56
  57 #define ccb_ecb_ptr spriv_ptr0
  58 #define ccb_ahb_ptr spriv_ptr1
  59
  60 #define ahb_inb(ahb, port)                              \
  61         bus_read_1((ahb)->res, port)
  62
  63 #define ahb_inl(ahb, port)                              \
  64         bus_read_4((ahb)->res, port)
  65
  66 #define ahb_outb(ahb, port, value)                      \
  67         bus_write_1((ahb)->res, port, value)
  68
  69 #define ahb_outl(ahb, port, value)                      \
  70         bus_write_4((ahb)->res, port, value)
  71
  72 static const char               *ahbmatch(eisa_id_t type);
  73 static struct ahb_softc         *ahballoc(device_t dev, struct resource *res);
  74 static void                      ahbfree(struct ahb_softc *ahb);
  75 static int                       ahbreset(struct ahb_softc *ahb);
  76 static void                      ahbmapecbs(void *arg, bus_dma_segment_t *segs,
  77                                             int nseg, int error);
  78 static int                       ahbxptattach(struct ahb_softc *ahb);
  79 static void                      ahbhandleimmed(struct ahb_softc *ahb,
  80                                                 u_int32_t mbox, u_int intstat);
  81 static void                      ahbcalcresid(struct ahb_softc *ahb,
  82                                               struct ecb *ecb, union ccb *ccb);
  83 static __inline void             ahbdone(struct ahb_softc *ahb, u_int32_t mbox,
  84                                          u_int intstat);
  85 static void                      ahbintr(void *arg);
  86 static void                      ahbintr_locked(struct ahb_softc *ahb);
  87 static bus_dmamap_callback_t     ahbexecuteecb;
  88 static void                      ahbaction(struct cam_sim *sim, union ccb *ccb);
  89 static void                      ahbpoll(struct cam_sim *sim);
  90
  91 /* Our timeout handler */
  92 static void                      ahbtimeout(void *arg);
  93
  94 static __inline struct ecb*     ahbecbget(struct ahb_softc *ahb);
  95 static __inline void            ahbecbfree(struct ahb_softc* ahb,
  96                                            struct ecb* ecb);
  97 static __inline u_int32_t       ahbecbvtop(struct ahb_softc *ahb,
  98                                            struct ecb *ecb);
  99 static __inline struct ecb*     ahbecbptov(struct ahb_softc *ahb,
 100                                            u_int32_t ecb_addr);
 101 static __inline u_int32_t       ahbstatuspaddr(u_int32_t ecb_paddr);
 102 static __inline u_int32_t       ahbsensepaddr(u_int32_t ecb_paddr);
 103 static __inline u_int32_t       ahbsgpaddr(u_int32_t ecb_paddr);
 104 static __inline void            ahbqueuembox(struct ahb_softc *ahb,
 105                                              u_int32_t mboxval,
 106                                              u_int attn_code);
 107
 108 static __inline struct ecb*
 109 ahbecbget(struct ahb_softc *ahb)
 110 {
 111         struct  ecb* ecb;
 112
 113         if (!dumping)
 114                 mtx_assert(&ahb->lock, MA_OWNED);
 115         if ((ecb = SLIST_FIRST(&ahb->free_ecbs)) != NULL)
 116                 SLIST_REMOVE_HEAD(&ahb->free_ecbs, links);
 117
 118         return (ecb);
 119 }
 120
 121 static __inline void
 122 ahbecbfree(struct ahb_softc* ahb, struct ecb* ecb)
 123 {
 124
 125         if (!dumping)
 126                 mtx_assert(&ahb->lock, MA_OWNED);
 127         ecb->state = ECB_FREE;
 128         SLIST_INSERT_HEAD(&ahb->free_ecbs, ecb, links);
 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("%s: adapter not taking commands\n",
 179                     device_get_nameunit(ahb->dev));
 180
 181         ahb_outl(ahb, MBOXOUT0, mboxval);
 182         ahb_outb(ahb, ATTN, attn_code);
 183 }
 184
 185 static const char *
 186 ahbmatch(eisa_id_t type)
 187 {
 188         switch(type & 0xfffffe00) {
 189                 case EISA_DEVICE_ID_ADAPTEC_1740:
 190                         return ("Adaptec 174x SCSI host adapter");
 191                         break;
 192                 default:
 193                         break;
 194         }
 195         return (NULL);
 196 }
 197
 198 static int
 199 ahbprobe(device_t dev)
 200 {
 201         const char *desc;
 202         u_int32_t iobase;
 203         u_int32_t irq;
 204         u_int8_t  intdef;
 205         int shared;
 206
 207         desc = ahbmatch(eisa_get_id(dev));
 208         if (!desc)
 209             return (ENXIO);
 210         device_set_desc(dev, desc);
 211
 212         iobase = (eisa_get_slot(dev) * EISA_SLOT_SIZE) +
 213             AHB_EISA_SLOT_OFFSET;
 214
 215         eisa_add_iospace(dev, iobase, AHB_EISA_IOSIZE, RESVADDR_NONE);
 216
 217         intdef = inb(INTDEF + iobase);
 218         switch (intdef & 0x7) {
 219         case INT9:
 220             irq = 9;
 221             break;
 222         case INT10:
 223             irq = 10;
 224             break;
 225         case INT11:
 226             irq = 11;
 227             break;
 228         case INT12:
 229             irq = 12;
 230             break;
 231         case INT14:
 232             irq = 14;
 233             break;
 234         case INT15:
 235             irq = 15;
 236             break;
 237         default:
 238             printf("Adaptec 174X at slot %d: illegal "
 239                    "irq setting %d\n", eisa_get_slot(dev),
 240                    (intdef & 0x7));
 241             irq = 0;
 242             break;
 243         }
 244         if (irq == 0)
 245             return ENXIO;
 246
 247         shared = (inb(INTDEF + iobase) & INTLEVEL) ?
 248                  EISA_TRIGGER_LEVEL : EISA_TRIGGER_EDGE;
 249
 250         eisa_add_intr(dev, irq, shared);
 251
 252         return 0;
 253 }
 254
 255 static int
 256 ahbattach(device_t dev)
 257 {
 258         /*
 259          * find unit and check we have that many defined
 260          */
 261         struct      ahb_softc *ahb;
 262         struct      ecb* next_ecb;
 263         struct      resource *io;
 264         struct      resource *irq;
 265         int         rid;
 266         void        *ih;
 267
 268         irq = NULL;
 269         rid = 0;
 270         io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
 271         if (io == NULL) {
 272                 device_printf(dev, "No I/O space?!\n");
 273                 return ENOMEM;
 274         }
 275
 276         ahb = ahballoc(dev, io);
 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 == NULL) {
 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      */ &ahb->lock,
 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     */ NULL,
 327                                 /* lockarg      */ NULL,
 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                 callout_init_mtx(&next_ecb->timer, &ahb->lock, 0);
 360                 ecb_paddr = ahbecbvtop(ahb, next_ecb);
 361                 next_ecb->hecb.status_ptr = ahbstatuspaddr(ecb_paddr);
 362                 next_ecb->hecb.sense_ptr = ahbsensepaddr(ecb_paddr);
 363                 ahb->num_ecbs++;
 364                 ahbecbfree(ahb, next_ecb);
 365                 next_ecb++;
 366         }
 367
 368         ahb->init_level++;
 369
 370         /*
 371          * Now that we know we own the resources we need, register
 372          * our bus with the XPT.
 373          */
 374         if (ahbxptattach(ahb))
 375                 goto error_exit;
 376
 377         /* Enable our interrupt */
 378         if (bus_setup_intr(dev, irq, INTR_TYPE_CAM|INTR_ENTROPY|INTR_MPSAFE,
 379             NULL, ahbintr,  ahb, &ih) != 0)
 380                 goto error_exit;
 381
 382         return (0);
 383
 384 error_exit:
 385         /*
 386          * The board's IRQ line will not be left enabled
 387          * if we can't initialize correctly, so its safe
 388          * to release the irq.
 389          */
 390         ahbfree(ahb);
 391         if (irq != NULL)
 392                 bus_release_resource(dev, SYS_RES_IRQ, 0, irq);
 393         bus_release_resource(dev, SYS_RES_IOPORT, 0, io);
 394         return (-1);
 395 }
 396
 397 static struct ahb_softc *
 398 ahballoc(device_t dev, struct resource *res)
 399 {
 400         struct  ahb_softc *ahb;
 401
 402         ahb = device_get_softc(dev);
 403         SLIST_INIT(&ahb->free_ecbs);
 404         LIST_INIT(&ahb->pending_ccbs);
 405         ahb->res = res;
 406         ahb->disc_permitted = ~0;
 407         ahb->tags_permitted = ~0;
 408         ahb->dev = dev;
 409         mtx_init(&ahb->lock, "ahb", NULL, MTX_DEF);
 410
 411         return (ahb);
 412 }
 413
 414 static void
 415 ahbfree(struct ahb_softc *ahb)
 416 {
 417         switch (ahb->init_level) {
 418         default:
 419         case 4:
 420                 bus_dmamap_unload(ahb->ecb_dmat, ahb->ecb_dmamap);
 421         case 3:
 422                 bus_dmamem_free(ahb->ecb_dmat, ahb->ecb_array,
 423                                 ahb->ecb_dmamap);
 424                 bus_dmamap_destroy(ahb->ecb_dmat, ahb->ecb_dmamap);
 425         case 2:
 426                 bus_dma_tag_destroy(ahb->ecb_dmat);
 427         case 1:
 428                 bus_dma_tag_destroy(ahb->buffer_dmat);
 429         case 0:
 430                 break;
 431         }
 432         mtx_destroy(&ahb->lock);
 433 }
 434
 435 /*
 436  * reset board, If it doesn't respond, return failure
 437  */
 438 static int
 439 ahbreset(struct ahb_softc *ahb)
 440 {
 441         int     wait = 1000;    /* 1 sec enough? */
 442         int     test;
 443
 444         if ((ahb_inb(ahb, PORTADDR) & PORTADDR_ENHANCED) == 0) {
 445                 printf("ahb_reset: Controller not in enhanced mode\n");
 446                 return (-1);
 447         }
 448
 449         ahb_outb(ahb, CONTROL, CNTRL_HARD_RST);
 450         DELAY(1000);
 451         ahb_outb(ahb, CONTROL, 0);
 452         while (--wait) {
 453                 DELAY(1000);
 454                 if ((ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_BUSY) == 0)
 455                         break;
 456         }
 457
 458         if (wait == 0) {
 459                 printf("ahbreset: No answer from aha1742 board\n");
 460                 return (-1);
 461         }
 462         if ((test = ahb_inb(ahb, MBOXIN0)) != 0) {
 463                 printf("ahb_reset: self test failed, val = 0x%x\n", test);
 464                 return (-1);
 465         }
 466         while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
 467                 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
 468                 DELAY(10000);
 469         }
 470         return (0);
 471 }
 472
 473 static void
 474 ahbmapecbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 475 {
 476         struct ahb_softc* ahb;
 477
 478         ahb = (struct ahb_softc*)arg;
 479         ahb->ecb_physbase = segs->ds_addr;
 480         /*
 481          * Space for adapter inquiry information is on the
 482          * tail of the ecb array.
 483          */
 484         ahb->ha_inq_physbase = ahbecbvtop(ahb, &ahb->ecb_array[AHB_NECB]);
 485 }
 486
 487 static int
 488 ahbxptattach(struct ahb_softc *ahb)
 489 {
 490         struct cam_devq *devq;
 491         struct ecb *ecb;
 492         u_int  i;
 493
 494         mtx_lock(&ahb->lock);
 495
 496         /* Remember who are we on the scsi bus */
 497         ahb->scsi_id = ahb_inb(ahb, SCSIDEF) & HSCSIID;
 498
 499         /* Use extended translation?? */
 500         ahb->extended_trans = ahb_inb(ahb, RESV1) & EXTENDED_TRANS;
 501
 502         /* Fetch adapter inquiry data */
 503         ecb = ahbecbget(ahb);   /* Always succeeds - no outstanding commands */
 504         ecb->hecb.opcode = ECBOP_READ_HA_INQDATA;
 505         ecb->hecb.flag_word1 = FW1_SUPPRESS_URUN_ERR|FW1_ERR_STATUS_BLK_ONLY;
 506         ecb->hecb.data_ptr = ahb->ha_inq_physbase;
 507         ecb->hecb.data_len = sizeof(struct ha_inquiry_data);
 508         ecb->hecb.sense_ptr = 0;
 509         ecb->state = ECB_ACTIVE;
 510
 511         /* Tell the adapter about this command */
 512         ahbqueuembox(ahb, ahbecbvtop(ahb, ecb),
 513                      ATTN_STARTECB|ahb->scsi_id);
 514
 515         /* Poll for interrupt completion */
 516         for (i = 1000; ecb->state != ECB_FREE && i != 0; i--) {
 517                 ahbintr_locked(ahb);
 518                 DELAY(1000);
 519         }
 520
 521         ahb->num_ecbs = MIN(ahb->num_ecbs,
 522                             ahb->ha_inq_data->scsi_data.spc2_flags);
 523         device_printf(ahb->dev,
 524                "%.8s %s SCSI Adapter, FW Rev. %.4s, ID=%d, %d ECBs\n",
 525                ahb->ha_inq_data->scsi_data.product,
 526                (ahb->ha_inq_data->scsi_data.flags & 0x4) ? "Differential"
 527                                                          : "Single Ended",
 528                ahb->ha_inq_data->scsi_data.revision,
 529                ahb->scsi_id, ahb->num_ecbs);
 530
 531         /* Restore sense paddr for future CCB clients */
 532         ecb->hecb.sense_ptr = ahbsensepaddr(ahbecbvtop(ahb, ecb));
 533
 534         ahbecbfree(ahb, ecb);
 535
 536         /*
 537          * Create the device queue for our SIM.
 538          */
 539         devq = cam_simq_alloc(ahb->num_ecbs);
 540         if (devq == NULL) {
 541                 mtx_unlock(&ahb->lock);
 542                 return (ENOMEM);
 543         }
 544
 545         /*
 546          * Construct our SIM entry
 547          */
 548         ahb->sim = cam_sim_alloc(ahbaction, ahbpoll, "ahb", ahb,
 549             device_get_unit(ahb->dev), &ahb->lock, 2, ahb->num_ecbs, devq);
 550         if (ahb->sim == NULL) {
 551                 cam_simq_free(devq);
 552                 mtx_unlock(&ahb->lock);
 553                 return (ENOMEM);
 554         }
 555
 556         if (xpt_bus_register(ahb->sim, ahb->dev, 0) != CAM_SUCCESS) {
 557                 cam_sim_free(ahb->sim, /*free_devq*/TRUE);
 558                 mtx_unlock(&ahb->lock);
 559                 return (ENXIO);
 560         }
 561
 562         if (xpt_create_path(&ahb->path, /*periph*/NULL,
 563                             cam_sim_path(ahb->sim), CAM_TARGET_WILDCARD,
 564                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 565                 xpt_bus_deregister(cam_sim_path(ahb->sim));
 566                 cam_sim_free(ahb->sim, /*free_devq*/TRUE);
 567                 mtx_unlock(&ahb->lock);
 568                 return (ENXIO);
 569         }
 570
 571         /*
 572          * Allow the board to generate interrupts.
 573          */
 574         ahb_outb(ahb, INTDEF, ahb_inb(ahb, INTDEF) | INTEN);
 575         mtx_unlock(&ahb->lock);
 576
 577         return (0);
 578 }
 579
 580 static void
 581 ahbhandleimmed(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
 582 {
 583         struct ccb_hdr *ccb_h;
 584         u_int target_id;
 585
 586         if (ahb->immed_cmd == 0) {
 587                 device_printf(ahb->dev, "Immediate Command complete with no "
 588                        " pending command\n");
 589                 return;
 590         }
 591
 592         target_id = intstat & INTSTAT_TARGET_MASK;
 593
 594         ccb_h = LIST_FIRST(&ahb->pending_ccbs);
 595         while (ccb_h != NULL) {
 596                 struct ecb *pending_ecb;
 597                 union ccb *ccb;
 598
 599                 pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
 600                 ccb = pending_ecb->ccb;
 601                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 602                 if (ccb->ccb_h.target_id == target_id
 603                  || target_id == ahb->scsi_id) {
 604                         callout_stop(&pending_ecb->timer);
 605                         LIST_REMOVE(&ccb->ccb_h, sim_links.le);
 606                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 607                                 bus_dmamap_unload(ahb->buffer_dmat,
 608                                                   pending_ecb->dmamap);
 609                         if (pending_ecb == ahb->immed_ecb)
 610                                 ccb->ccb_h.status =
 611                                     CAM_CMD_TIMEOUT|CAM_RELEASE_SIMQ;
 612                         else if (target_id == ahb->scsi_id)
 613                                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 614                         else
 615                                 ccb->ccb_h.status = CAM_BDR_SENT;
 616                         ahbecbfree(ahb, pending_ecb);
 617                         xpt_done(ccb);
 618                 } else if (ahb->immed_ecb != NULL) {
 619                         /* Re-instate timeout */
 620                         callout_reset(&pending_ecb->timer,
 621                             (ccb->ccb_h.timeout * hz) / 1000,
 622                             ahbtimeout, pending_ecb);
 623                 }
 624         }
 625
 626         if (ahb->immed_ecb != NULL) {
 627                 ahb->immed_ecb = NULL;
 628                 device_printf(ahb->dev, "No longer in timeout\n");
 629         } else if (target_id == ahb->scsi_id)
 630                 device_printf(ahb->dev, "SCSI Bus Reset Delivered\n");
 631         else
 632                 device_printf(ahb->dev,
 633                     "Bus Device Reset Delivered to target %d\n", target_id);
 634
 635         ahb->immed_cmd = 0;
 636 }
 637
 638 static void
 639 ahbcalcresid(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
 640 {
 641         if (ecb->status.data_overrun != 0) {
 642                 /*
 643                  * Overrun Condition.  The hardware doesn't
 644                  * provide a meaningful byte count in this case
 645                  * (the residual is always 0).  Tell the XPT
 646                  * layer about the error.
 647                  */
 648                 ccb->ccb_h.status = CAM_DATA_RUN_ERR;
 649         } else {
 650                 ccb->csio.resid = ecb->status.resid_count;
 651
 652                 if ((ecb->hecb.flag_word1 & FW1_SG_ECB) != 0) {
 653                         /*
 654                          * For S/G transfers, the adapter provides a pointer
 655                          * to the address in the last S/G element used and a
 656                          * residual for that element.  So, we need to sum up
 657                          * the elements that follow it in order to get a real
 658                          * residual number.  If we have an overrun, the residual
 659                          * reported will be 0 and we already know that all S/G
 660                          * segments have been exhausted, so we can skip this
 661                          * step.
 662                          */
 663                         ahb_sg_t *sg;
 664                         int       num_sg;
 665
 666                         num_sg = ecb->hecb.data_len / sizeof(ahb_sg_t);
 667
 668                         /* Find the S/G the adapter was working on */
 669                         for (sg = ecb->sg_list;
 670                              num_sg != 0 && sg->addr != ecb->status.resid_addr;
 671                              num_sg--, sg++)
 672                                 ;
 673
 674                         /* Skip it */
 675                         num_sg--;
 676                         sg++;
 677
 678                         /* Sum the rest */
 679                         for (; num_sg != 0; num_sg--, sg++)
 680                                 ccb->csio.resid += sg->len;
 681                 }
 682                 /* Underruns are not errors */
 683                 ccb->ccb_h.status = CAM_REQ_CMP;
 684         }
 685 }
 686
 687 static void
 688 ahbprocesserror(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
 689 {
 690         struct hardware_ecb *hecb;
 691         struct ecb_status *status;
 692
 693         hecb = &ecb->hecb;
 694         status = &ecb->status;
 695         switch (status->ha_status) {
 696         case HS_OK:
 697                 ccb->csio.scsi_status = status->scsi_status;
 698                 if (status->scsi_status != 0) {
 699                         ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 700                         if (status->sense_stored) {
 701                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 702                                 ccb->csio.sense_resid =
 703                                     ccb->csio.sense_len - status->sense_len;
 704                                 bcopy(&ecb->sense, &ccb->csio.sense_data,
 705                                       status->sense_len);
 706                         }
 707                 }
 708                 break;
 709         case HS_TARGET_NOT_ASSIGNED:
 710                 ccb->ccb_h.status = CAM_PATH_INVALID;
 711                 break;
 712         case HS_SEL_TIMEOUT:
 713                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
 714                 break;
 715         case HS_DATA_RUN_ERR:
 716                 ahbcalcresid(ahb, ecb, ccb);
 717                 break;
 718         case HS_UNEXPECTED_BUSFREE:
 719                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
 720                 break;
 721         case HS_INVALID_PHASE:
 722                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
 723                 break;
 724         case HS_REQUEST_SENSE_FAILED:
 725                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
 726                 break;
 727         case HS_TAG_MSG_REJECTED:
 728         {
 729                 struct ccb_trans_settings neg;
 730                 struct ccb_trans_settings_scsi *scsi = &neg.proto_specific.scsi;
 731
 732                 xpt_print_path(ccb->ccb_h.path);
 733                 printf("refuses tagged commands.  Performing "
 734                        "non-tagged I/O\n");
 735                 memset(&neg, 0, sizeof (neg));
 736                 neg.protocol = PROTO_SCSI;
 737                 neg.protocol_version = SCSI_REV_2;
 738                 neg.transport = XPORT_SPI;
 739                 neg.transport_version = 2;
 740                 scsi->flags = CTS_SCSI_VALID_TQ;
 741                 xpt_setup_ccb(&neg.ccb_h, ccb->ccb_h.path, /*priority*/1);
 742                 xpt_async(AC_TRANSFER_NEG, ccb->ccb_h.path, &neg);
 743                 ahb->tags_permitted &= ~(0x01 << ccb->ccb_h.target_id);
 744                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
 745                 break;
 746         }
 747         case HS_FIRMWARE_LOAD_REQ:
 748         case HS_HARDWARE_ERR:
 749                 /*
 750                  * Tell the system that the Adapter
 751                  * is no longer functional.
 752                  */
 753                 ccb->ccb_h.status = CAM_NO_HBA;
 754                 break;
 755         case HS_CMD_ABORTED_HOST:
 756         case HS_CMD_ABORTED_ADAPTER:
 757         case HS_ATN_TARGET_FAILED:
 758         case HS_SCSI_RESET_ADAPTER:
 759         case HS_SCSI_RESET_INCOMING:
 760                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 761                 break;
 762         case HS_INVALID_ECB_PARAM:
 763                 device_printf(ahb->dev,
 764                     "opcode 0x%02x, flag_word1 0x%02x, flag_word2 0x%02x\n",
 765                     hecb->opcode, hecb->flag_word1, hecb->flag_word2);
 766                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 767                 break;
 768         case HS_DUP_TCB_RECEIVED:
 769         case HS_INVALID_OPCODE:
 770         case HS_INVALID_CMD_LINK:
 771         case HS_PROGRAM_CKSUM_ERROR:
 772                 panic("%s: Can't happen host status %x occurred",
 773                     device_get_nameunit(ahb->dev), status->ha_status);
 774                 break;
 775         }
 776         if (ccb->ccb_h.status != CAM_REQ_CMP) {
 777                 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 778                 ccb->ccb_h.status |= CAM_DEV_QFRZN;
 779         }
 780 }
 781
 782 static void
 783 ahbdone(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
 784 {
 785         struct ecb *ecb;
 786         union ccb *ccb;
 787
 788         ecb = ahbecbptov(ahb, mbox);
 789
 790         if ((ecb->state & ECB_ACTIVE) == 0)
 791                 panic("ecb not active");
 792
 793         ccb = ecb->ccb;
 794
 795         if (ccb != NULL) {
 796                 callout_stop(&ecb->timer);
 797                 LIST_REMOVE(&ccb->ccb_h, sim_links.le);
 798
 799                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 800                         bus_dmasync_op_t op;
 801
 802                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 803                                 op = BUS_DMASYNC_POSTREAD;
 804                         else
 805                                 op = BUS_DMASYNC_POSTWRITE;
 806                         bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
 807                         bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
 808                 }
 809
 810                 if ((intstat & INTSTAT_MASK) == INTSTAT_ECB_OK) {
 811                         ccb->ccb_h.status = CAM_REQ_CMP;
 812                         ccb->csio.resid = 0;
 813                 } else {
 814                         ahbprocesserror(ahb, ecb, ccb);
 815                 }
 816                 ahbecbfree(ahb, ecb);
 817                 xpt_done(ccb);
 818         } else {
 819                 /* Non CCB Command */
 820                 if ((intstat & INTSTAT_MASK) != INTSTAT_ECB_OK) {
 821                         device_printf(ahb->dev, "Command 0%x Failed %x:%x:%x\n",
 822                                ecb->hecb.opcode,
 823                                *((u_int16_t*)&ecb->status),
 824                                ecb->status.ha_status, ecb->status.resid_count);
 825                 }
 826                 /* Client owns this ECB and will release it. */
 827         }
 828 }
 829
 830 /*
 831  * Catch an interrupt from the adaptor
 832  */
 833 static void
 834 ahbintr(void *arg)
 835 {
 836         struct    ahb_softc *ahb;
 837
 838         ahb = arg;
 839         mtx_lock(&ahb->lock);
 840         ahbintr_locked(ahb);
 841         mtx_unlock(&ahb->lock);
 842 }
 843
 844 static void
 845 ahbintr_locked(struct ahb_softc *ahb)
 846 {
 847         u_int     intstat;
 848         u_int32_t mbox;
 849
 850         while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
 851                 /*
 852                  * Fetch information about this interrupt.
 853                  */
 854                 intstat = ahb_inb(ahb, INTSTAT);
 855                 mbox = ahb_inl(ahb, MBOXIN0);
 856
 857                 /*
 858                  * Reset interrupt latch.
 859                  */
 860                 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
 861
 862                 /*
 863                  * Process the completed operation
 864                  */
 865                 switch (intstat & INTSTAT_MASK) {
 866                 case INTSTAT_ECB_OK:
 867                 case INTSTAT_ECB_CMPWRETRY:
 868                 case INTSTAT_ECB_CMPWERR:
 869                         ahbdone(ahb, mbox, intstat);
 870                         break;
 871                 case INTSTAT_AEN_OCCURED:
 872                         if ((intstat & INTSTAT_TARGET_MASK) == ahb->scsi_id) {
 873                                 /* Bus Reset */
 874                                 xpt_print_path(ahb->path);
 875                                 switch (mbox) {
 876                                 case HS_SCSI_RESET_ADAPTER:
 877                                         printf("Host Adapter Initiated "
 878                                                "Bus Reset occurred\n");
 879                                         break;
 880                                 case HS_SCSI_RESET_INCOMING:
 881                                         printf("Bus Reset Initiated "
 882                                                "by another device occurred\n");
 883                                         break;
 884                                 }
 885                                 /* Notify the XPT */
 886                                 xpt_async(AC_BUS_RESET, ahb->path, NULL);
 887                                 break;
 888                         }
 889                         printf("Unsupported initiator selection AEN occured\n");
 890                         break;
 891                 case INTSTAT_IMMED_OK:
 892                 case INTSTAT_IMMED_ERR:
 893                         ahbhandleimmed(ahb, mbox, intstat);
 894                         break;
 895                 case INTSTAT_HW_ERR:
 896                         panic("Unrecoverable hardware Error Occurred\n");
 897                 }
 898         }
 899 }
 900
 901 static void
 902 ahbexecuteecb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 903 {
 904         struct    ecb *ecb;
 905         union     ccb *ccb;
 906         struct    ahb_softc *ahb;
 907         u_int32_t ecb_paddr;
 908
 909         ecb = (struct ecb *)arg;
 910         ccb = ecb->ccb;
 911         ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
 912         mtx_assert(&ahb->lock, MA_OWNED);
 913
 914         if (error != 0) {
 915                 if (error != EFBIG)
 916                         device_printf(ahb->dev,
 917                             "Unexepected error 0x%x returned from "
 918                             "bus_dmamap_load\n", error);
 919                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 920                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 921                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 922                 }
 923                 ahbecbfree(ahb, ecb);
 924                 xpt_done(ccb);
 925                 return;
 926         }
 927
 928         ecb_paddr = ahbecbvtop(ahb, ecb);
 929
 930         if (nseg != 0) {
 931                 ahb_sg_t *sg;
 932                 bus_dma_segment_t *end_seg;
 933                 bus_dmasync_op_t op;
 934
 935                 end_seg = dm_segs + nseg;
 936
 937                 /* Copy the segments into our SG list */
 938                 sg = ecb->sg_list;
 939                 while (dm_segs < end_seg) {
 940                         sg->addr = dm_segs->ds_addr;
 941                         sg->len = dm_segs->ds_len;
 942                         sg++;
 943                         dm_segs++;
 944                 }
 945
 946                 if (nseg > 1) {
 947                         ecb->hecb.flag_word1 |= FW1_SG_ECB;
 948                         ecb->hecb.data_ptr = ahbsgpaddr(ecb_paddr);
 949                         ecb->hecb.data_len = sizeof(ahb_sg_t) * nseg;
 950                 } else {
 951                         ecb->hecb.data_ptr = ecb->sg_list->addr;
 952                         ecb->hecb.data_len = ecb->sg_list->len;
 953                 }
 954
 955                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
 956 /*                      ecb->hecb.flag_word2 |= FW2_DATA_DIR_IN; */
 957                         op = BUS_DMASYNC_PREREAD;
 958                 } else {
 959                         op = BUS_DMASYNC_PREWRITE;
 960                 }
 961                 /* ecb->hecb.flag_word2 |= FW2_CHECK_DATA_DIR; */
 962
 963                 bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
 964
 965         } else {
 966                 ecb->hecb.data_ptr = 0;
 967                 ecb->hecb.data_len = 0;
 968         }
 969
 970         /*
 971          * Last time we need to check if this CCB needs to
 972          * be aborted.
 973          */
 974         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 975                 if (nseg != 0)
 976                         bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
 977                 ahbecbfree(ahb, ecb);
 978                 xpt_done(ccb);
 979                 return;
 980         }
 981
 982         ecb->state = ECB_ACTIVE;
 983         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 984         LIST_INSERT_HEAD(&ahb->pending_ccbs, &ccb->ccb_h, sim_links.le);
 985
 986         /* Tell the adapter about this command */
 987         ahbqueuembox(ahb, ecb_paddr, ATTN_STARTECB|ccb->ccb_h.target_id);
 988
 989         callout_reset(&ecb->timer, (ccb->ccb_h.timeout * hz) / 1000, ahbtimeout,
 990             ecb);
 991 }
 992
 993 static void
 994 ahbaction(struct cam_sim *sim, union ccb *ccb)
 995 {
 996         struct  ahb_softc *ahb;
 997
 998         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahbaction\n"));
 999
1000         ahb = (struct ahb_softc *)cam_sim_softc(sim);
1001         mtx_assert(&ahb->lock, MA_OWNED);
1002
1003         switch (ccb->ccb_h.func_code) {
1004         /* Common cases first */
1005         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
1006         {
1007                 struct ecb *ecb;
1008                 struct hardware_ecb *hecb;
1009                 int error;
1010
1011                 /*
1012                  * get an ecb to use.
1013                  */
1014                 if ((ecb = ahbecbget(ahb)) == NULL) {
1015                         /* Should never occur */
1016                         panic("Failed to get an ecb");
1017                 }
1018
1019                 /*
1020                  * So we can find the ECB when an abort is requested
1021                  */
1022                 ecb->ccb = ccb;
1023                 ccb->ccb_h.ccb_ecb_ptr = ecb;
1024                 ccb->ccb_h.ccb_ahb_ptr = ahb;
1025
1026                 /*
1027                  * Put all the arguments for the xfer in the ecb
1028                  */
1029                 hecb = &ecb->hecb;
1030                 hecb->opcode = ECBOP_INITIATOR_SCSI_CMD;
1031                 hecb->flag_word1 = FW1_AUTO_REQUEST_SENSE
1032                                  | FW1_ERR_STATUS_BLK_ONLY;
1033                 hecb->flag_word2 = ccb->ccb_h.target_lun
1034                                  | FW2_NO_RETRY_ON_BUSY;
1035                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
1036                         hecb->flag_word2 |= FW2_TAG_ENB
1037                                          | ((ccb->csio.tag_action & 0x3)
1038                                             << FW2_TAG_TYPE_SHIFT);
1039                 }
1040                 if ((ccb->ccb_h.flags & CAM_DIS_DISCONNECT) != 0)
1041                         hecb->flag_word2 |= FW2_DISABLE_DISC;
1042                 hecb->sense_len = ccb->csio.sense_len;
1043                 hecb->cdb_len = ccb->csio.cdb_len;
1044                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
1045                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
1046                                 bcopy(ccb->csio.cdb_io.cdb_ptr,
1047                                       hecb->cdb, hecb->cdb_len);
1048                         } else {
1049                                 /* I guess I could map it in... */
1050                                 ccb->ccb_h.status = CAM_REQ_INVALID;
1051                                 ahbecbfree(ahb, ecb);
1052                                 xpt_done(ccb);
1053                                 return;
1054                         }
1055                 } else {
1056                         bcopy(ccb->csio.cdb_io.cdb_bytes,
1057                               hecb->cdb, hecb->cdb_len);
1058                 }
1059
1060                 error = bus_dmamap_load_ccb(
1061                     ahb->buffer_dmat,
1062                     ecb->dmamap,
1063                     ccb,
1064                     ahbexecuteecb,
1065                     ecb, /*flags*/0);
1066                 if (error == EINPROGRESS) {
1067                         /*
1068                          * So as to maintain ordering, freeze the controller
1069                          * queue until our mapping is returned.
1070                          */
1071                         xpt_freeze_simq(ahb->sim, 1);
1072                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1073                 }
1074                 break;
1075         }
1076         case XPT_EN_LUN:                /* Enable LUN as a target */
1077         case XPT_TARGET_IO:             /* Execute target I/O request */
1078         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
1079         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
1080         case XPT_ABORT:                 /* Abort the specified CCB */
1081                 /* XXX Implement */
1082                 ccb->ccb_h.status = CAM_REQ_INVALID;
1083                 xpt_done(ccb);
1084                 break;
1085         case XPT_SET_TRAN_SETTINGS:
1086         {
1087                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1088                 xpt_done(ccb);
1089                 break;
1090         }
1091         case XPT_GET_TRAN_SETTINGS:
1092         /* Get default/user set transfer settings for the target */
1093         {
1094                 struct  ccb_trans_settings *cts = &ccb->cts;
1095                 u_int   target_mask = 0x01 << ccb->ccb_h.target_id;
1096                 struct ccb_trans_settings_scsi *scsi =
1097                     &cts->proto_specific.scsi;
1098                 struct ccb_trans_settings_spi *spi =
1099                     &cts->xport_specific.spi;
1100
1101                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
1102                         cts->protocol = PROTO_SCSI;
1103                         cts->protocol_version = SCSI_REV_2;
1104                         cts->transport = XPORT_SPI;
1105                         cts->transport_version = 2;
1106
1107                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
1108                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
1109                         if ((ahb->disc_permitted & target_mask) != 0)
1110                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
1111                         if ((ahb->tags_permitted & target_mask) != 0)
1112                                 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
1113                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1114                         spi->sync_period = 25; /* 10MHz */
1115
1116                         if (spi->sync_period != 0)
1117                                 spi->sync_offset = 15;
1118
1119                         spi->valid = CTS_SPI_VALID_SYNC_RATE
1120                                    | CTS_SPI_VALID_SYNC_OFFSET
1121                                    | CTS_SPI_VALID_BUS_WIDTH
1122                                    | CTS_SPI_VALID_DISC;
1123                         scsi->valid = CTS_SCSI_VALID_TQ;
1124                         ccb->ccb_h.status = CAM_REQ_CMP;
1125                 } else {
1126                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1127                 }
1128                 xpt_done(ccb);
1129                 break;
1130         }
1131         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
1132         {
1133                 int i;
1134
1135                 ahb->immed_cmd = IMMED_RESET;
1136                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1137                 /* Poll for interrupt completion */
1138                 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--) {
1139                         DELAY(1000);
1140                         ahbintr_locked(cam_sim_softc(sim));
1141                 }
1142                 break;
1143         }
1144         case XPT_CALC_GEOMETRY:
1145         {
1146                 cam_calc_geometry(&ccb->ccg, ahb->extended_trans);
1147                 xpt_done(ccb);
1148                 break;
1149         }
1150         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1151         {
1152                 int i;
1153
1154                 ahb->immed_cmd = IMMED_RESET;
1155                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1156                 /* Poll for interrupt completion */
1157                 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--)
1158                         DELAY(1000);
1159                 ccb->ccb_h.status = CAM_REQ_CMP;
1160                 xpt_done(ccb);
1161                 break;
1162         }
1163         case XPT_TERM_IO:               /* Terminate the I/O process */
1164                 /* XXX Implement */
1165                 ccb->ccb_h.status = CAM_REQ_INVALID;
1166                 xpt_done(ccb);
1167                 break;
1168         case XPT_PATH_INQ:              /* Path routing inquiry */
1169         {
1170                 struct ccb_pathinq *cpi = &ccb->cpi;
1171
1172                 cpi->version_num = 1; /* XXX??? */
1173                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1174                 cpi->target_sprt = 0;
1175                 cpi->hba_misc = 0;
1176                 cpi->hba_eng_cnt = 0;
1177                 cpi->max_target = 7;
1178                 cpi->max_lun = 7;
1179                 cpi->initiator_id = ahb->scsi_id;
1180                 cpi->bus_id = cam_sim_bus(sim);
1181                 cpi->base_transfer_speed = 3300;
1182                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1183                 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
1184                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1185                 cpi->unit_number = cam_sim_unit(sim);
1186                 cpi->transport = XPORT_SPI;
1187                 cpi->transport_version = 2;
1188                 cpi->protocol = PROTO_SCSI;
1189                 cpi->protocol_version = SCSI_REV_2;
1190                 cpi->ccb_h.status = CAM_REQ_CMP;
1191                 xpt_done(ccb);
1192                 break;
1193         }
1194 #if 0
1195         /* Need these??? */
1196         case XPT_IMMED_NOTIFY:          /* Notify Host Target driver of event */
1197         case XPT_NOTIFY_ACK:            /* Acknowledgement of event */
1198 #endif
1199         default:
1200                 ccb->ccb_h.status = CAM_REQ_INVALID;
1201                 xpt_done(ccb);
1202                 break;
1203         }
1204 }
1205
1206 static void
1207 ahbpoll(struct cam_sim *sim)
1208 {
1209         ahbintr(cam_sim_softc(sim));
1210 }
1211
1212 static void
1213 ahbtimeout(void *arg)
1214 {
1215         struct ecb       *ecb;
1216         union  ccb       *ccb;
1217         struct ahb_softc *ahb;
1218
1219         ecb = (struct ecb *)arg;
1220         ccb = ecb->ccb;
1221         ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
1222         mtx_assert(&ahb->lock, MA_OWNED);
1223         xpt_print_path(ccb->ccb_h.path);
1224         printf("ECB %p - timed out\n", (void *)ecb);
1225
1226         if ((ecb->state & ECB_ACTIVE) == 0) {
1227                 xpt_print_path(ccb->ccb_h.path);
1228                 printf("ECB %p - timed out ECB already completed\n",
1229                        (void *)ecb);
1230                 return;
1231         }
1232         /*
1233          * In order to simplify the recovery process, we ask the XPT
1234          * layer to halt the queue of new transactions and we traverse
1235          * the list of pending CCBs and remove their timeouts. This
1236          * means that the driver attempts to clear only one error
1237          * condition at a time.  In general, timeouts that occur
1238          * close together are related anyway, so there is no benefit
1239          * in attempting to handle errors in parrallel.  Timeouts will
1240          * be reinstated when the recovery process ends.
1241          */
1242         if ((ecb->state & ECB_DEVICE_RESET) == 0) {
1243                 struct ccb_hdr *ccb_h;
1244
1245                 if ((ecb->state & ECB_RELEASE_SIMQ) == 0) {
1246                         xpt_freeze_simq(ahb->sim, /*count*/1);
1247                         ecb->state |= ECB_RELEASE_SIMQ;
1248                 }
1249
1250                 LIST_FOREACH(ccb_h, &ahb->pending_ccbs, sim_links.le) {
1251                         struct ecb *pending_ecb;
1252
1253                         pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
1254                         callout_stop(&pending_ecb->timer);
1255                 }
1256
1257                 /* Store for our interrupt handler */
1258                 ahb->immed_ecb = ecb;
1259
1260                 /*
1261                  * Send a Bus Device Reset message:
1262                  * The target that is holding up the bus may not
1263                  * be the same as the one that triggered this timeout
1264                  * (different commands have different timeout lengths),
1265                  * but we have no way of determining this from our
1266                  * timeout handler.  Our strategy here is to queue a
1267                  * BDR message to the target of the timed out command.
1268                  * If this fails, we'll get another timeout 2 seconds
1269                  * later which will attempt a bus reset.
1270                  */
1271                 xpt_print_path(ccb->ccb_h.path);
1272                 printf("Queuing BDR\n");
1273                 ecb->state |= ECB_DEVICE_RESET;
1274                 callout_reset(&ecb->timer, 2 * hz, ahbtimeout, ecb);
1275
1276                 ahb->immed_cmd = IMMED_RESET;
1277                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1278         } else if ((ecb->state & ECB_SCSIBUS_RESET) != 0) {
1279                 /*
1280                  * Try a SCSI bus reset.  We do this only if we
1281                  * have already attempted to clear the condition with a BDR.
1282                  */
1283                 xpt_print_path(ccb->ccb_h.path);
1284                 printf("Attempting SCSI Bus reset\n");
1285                 ecb->state |= ECB_SCSIBUS_RESET;
1286                 callout_reset(&ecb->timer, 2 * hz, ahbtimeout, ecb);
1287                 ahb->immed_cmd = IMMED_RESET;
1288                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1289         } else {
1290                 /* Bring out the hammer... */
1291                 ahbreset(ahb);
1292
1293                 /* Simulate the reset complete interrupt */
1294                 ahbhandleimmed(ahb, 0, ahb->scsi_id|INTSTAT_IMMED_OK);
1295         }
1296 }
1297
1298 static device_method_t ahb_eisa_methods[] = {
1299         /* Device interface */
1300         DEVMETHOD(device_probe,         ahbprobe),
1301         DEVMETHOD(device_attach,        ahbattach),
1302
1303         { 0, 0 }
1304 };
1305
1306 static driver_t ahb_eisa_driver = {
1307         "ahb",
1308         ahb_eisa_methods,
1309         sizeof(struct ahb_softc),
1310 };
1311
1312 static devclass_t ahb_devclass;
1313
1314 DRIVER_MODULE(ahb, eisa, ahb_eisa_driver, ahb_devclass, 0, 0);
1315 MODULE_DEPEND(ahb, eisa, 1, 1, 1);
1316 MODULE_DEPEND(ahb, cam, 1, 1, 1);