sys/dev/disk/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: src/sys/dev/ahb/ahb.c,v 1.18.2.3 2001/03/05 13:08:55 obrien Exp $
  29  * $DragonFly: src/sys/dev/disk/ahb/ahb.c,v 1.3 2003/07/27 01:49:50 hmp Exp $
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/malloc.h>
  36 #include <sys/module.h>
  37 #include <sys/bus.h>
  38
  39 #include <machine/bus_pio.h>
  40 #include <machine/bus.h>
  41 #include <machine/clock.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_space_read_1((ahb)->tag, (ahb)->bsh, port)
  62
  63 #define ahb_inl(ahb, port)                              \
  64         bus_space_read_4((ahb)->tag, (ahb)->bsh, port)
  65
  66 #define ahb_outb(ahb, port, value)                      \
  67         bus_space_write_1((ahb)->tag, (ahb)->bsh, port, value)
  68
  69 #define ahb_outl(ahb, port, value)                      \
  70         bus_space_write_4((ahb)->tag, (ahb)->bsh, port, value)
  71
  72 static const char               *ahbmatch(eisa_id_t type);
  73 static struct ahb_softc         *ahballoc(u_long unit, 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 bus_dmamap_callback_t     ahbexecuteecb;
  87 static void                      ahbaction(struct cam_sim *sim, union ccb *ccb);
  88 static void                      ahbpoll(struct cam_sim *sim);
  89
  90 /* Our timeout handler */
  91 static timeout_t ahbtimeout;
  92
  93 static __inline struct ecb*     ahbecbget(struct ahb_softc *ahb);
  94 static __inline void            ahbecbfree(struct ahb_softc* ahb,
  95                                            struct ecb* ecb);
  96 static __inline u_int32_t       ahbecbvtop(struct ahb_softc *ahb,
  97                                            struct ecb *ecb);
  98 static __inline struct ecb*     ahbecbptov(struct ahb_softc *ahb,
  99                                            u_int32_t ecb_addr);
 100 static __inline u_int32_t       ahbstatuspaddr(u_int32_t ecb_paddr);
 101 static __inline u_int32_t       ahbsensepaddr(u_int32_t ecb_paddr);
 102 static __inline u_int32_t       ahbsgpaddr(u_int32_t ecb_paddr);
 103 static __inline void            ahbqueuembox(struct ahb_softc *ahb,
 104                                              u_int32_t mboxval,
 105                                              u_int attn_code);
 106
 107 static __inline struct ecb*
 108 ahbecbget(struct ahb_softc *ahb)
 109 {
 110         struct  ecb* ecb;
 111         int     s;
 112
 113         s = splcam();
 114         if ((ecb = SLIST_FIRST(&ahb->free_ecbs)) != NULL)
 115                 SLIST_REMOVE_HEAD(&ahb->free_ecbs, links);
 116         splx(s);
 117
 118         return (ecb);
 119 }
 120
 121 static __inline void
 122 ahbecbfree(struct ahb_softc* ahb, struct ecb* ecb)
 123 {
 124         int s;
 125
 126         s = splcam();
 127         ecb->state = ECB_FREE;
 128         SLIST_INSERT_HEAD(&ahb->free_ecbs, ecb, links);
 129         splx(s);
 130 }
 131
 132 static __inline u_int32_t
 133 ahbecbvtop(struct ahb_softc *ahb, struct ecb *ecb)
 134 {
 135         return (ahb->ecb_physbase
 136               + (u_int32_t)((caddr_t)ecb - (caddr_t)ahb->ecb_array));
 137 }
 138
 139 static __inline struct ecb*
 140 ahbecbptov(struct ahb_softc *ahb, u_int32_t ecb_addr)
 141 {
 142         return (ahb->ecb_array
 143               + ((struct ecb*)ecb_addr - (struct ecb*)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(dev, SYS_RES_IOPORT, &rid,
 269                                 0, ~0, 1, RF_ACTIVE);
 270         if (!io) {
 271                 device_printf(dev, "No I/O space?!\n");
 272                 return ENOMEM;
 273         }
 274
 275         if ((ahb = ahballoc(device_get_unit(dev), io)) == NULL) {
 276                 goto error_exit2;
 277         }
 278
 279         if (ahbreset(ahb) != 0)
 280                 goto error_exit;
 281
 282         rid = 0;
 283         irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
 284                                  0, ~0, 1, RF_ACTIVE);
 285         if (!irq) {
 286                 device_printf(dev, "Can't allocate interrupt\n");
 287                 goto error_exit;
 288         }
 289
 290         /*
 291          * Create our DMA tags.  These tags define the kinds of device
 292          * accessible memory allocations and memory mappings we will
 293          * need to perform during normal operation.
 294          */
 295         /* DMA tag for mapping buffers into device visible space. */
 296         /* XXX Should be a child of the EISA bus dma tag */
 297         if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, /*boundary*/0,
 298                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
 299                                /*highaddr*/BUS_SPACE_MAXADDR,
 300                                /*filter*/NULL, /*filterarg*/NULL,
 301                                /*maxsize*/MAXBSIZE, /*nsegments*/AHB_NSEG,
 302                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
 303                                /*flags*/BUS_DMA_ALLOCNOW,
 304                                &ahb->buffer_dmat) != 0)
 305                 goto error_exit;
 306
 307         ahb->init_level++;
 308
 309         /* DMA tag for our ccb structures and ha inquiry data */
 310         if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, /*boundary*/0,
 311                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
 312                                /*highaddr*/BUS_SPACE_MAXADDR,
 313                                /*filter*/NULL, /*filterarg*/NULL,
 314                                (AHB_NECB * sizeof(struct ecb))
 315                                + sizeof(*ahb->ha_inq_data),
 316                                /*nsegments*/1,
 317                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
 318                                /*flags*/0, &ahb->ecb_dmat) != 0)
 319                 goto error_exit;
 320
 321         ahb->init_level++;
 322
 323         /* Allocation for our ccbs */
 324         if (bus_dmamem_alloc(ahb->ecb_dmat, (void **)&ahb->ecb_array,
 325                              BUS_DMA_NOWAIT, &ahb->ecb_dmamap) != 0)
 326                 goto error_exit;
 327
 328         ahb->ha_inq_data = (struct ha_inquiry_data *)&ahb->ecb_array[AHB_NECB];
 329
 330         ahb->init_level++;
 331
 332         /* And permanently map them */
 333         bus_dmamap_load(ahb->ecb_dmat, ahb->ecb_dmamap,
 334                         ahb->ecb_array, AHB_NSEG * sizeof(struct ecb),
 335                         ahbmapecbs, ahb, /*flags*/0);
 336
 337         ahb->init_level++;
 338
 339         /* Allocate the buffer dmamaps for each of our ECBs */
 340         bzero(ahb->ecb_array, (AHB_NECB * sizeof(struct ecb))
 341               + sizeof(*ahb->ha_inq_data));
 342         next_ecb = ahb->ecb_array;
 343         while (ahb->num_ecbs < AHB_NECB) {
 344                 u_int32_t ecb_paddr;
 345
 346                 if (bus_dmamap_create(ahb->buffer_dmat, /*flags*/0,
 347                                       &next_ecb->dmamap))
 348                         break;
 349                 ecb_paddr = ahbecbvtop(ahb, next_ecb);
 350                 next_ecb->hecb.status_ptr = ahbstatuspaddr(ecb_paddr);
 351                 next_ecb->hecb.sense_ptr = ahbsensepaddr(ecb_paddr);
 352                 ahb->num_ecbs++;
 353                 ahbecbfree(ahb, next_ecb);
 354                 next_ecb++;
 355         }
 356
 357         if (ahb->num_ecbs == 0)
 358                 goto error_exit;
 359
 360         ahb->init_level++;
 361
 362         /*
 363          * Now that we know we own the resources we need, register
 364          * our bus with the XPT.
 365          */
 366         if (ahbxptattach(ahb))
 367                 goto error_exit;
 368
 369         /* Enable our interrupt */
 370         bus_setup_intr(dev, irq, INTR_TYPE_CAM, ahbintr, ahb, &ih);
 371         return (0);
 372
 373 error_exit:
 374         /*
 375          * The board's IRQ line will not be left enabled
 376          * if we can't intialize correctly, so its safe
 377          * to release the irq.
 378          */
 379         ahbfree(ahb);
 380 error_exit2:
 381         if (io)
 382                 bus_release_resource(dev, SYS_RES_IOPORT, 0, io);
 383         if (irq)
 384                 bus_release_resource(dev, SYS_RES_IRQ, 0, irq);
 385         return (-1);
 386 }
 387
 388 static struct ahb_softc *
 389 ahballoc(u_long unit, struct resource *res)
 390 {
 391         struct  ahb_softc *ahb;
 392
 393         /*
 394          * Allocate a storage area for us
 395          */
 396         ahb = malloc(sizeof(struct ahb_softc), M_DEVBUF, M_NOWAIT | M_ZERO);
 397         if (!ahb) {
 398                 printf("ahb%ld: cannot malloc!\n", unit);
 399                 return (NULL);
 400         }
 401         SLIST_INIT(&ahb->free_ecbs);
 402         LIST_INIT(&ahb->pending_ccbs);
 403         ahb->unit = unit;
 404         ahb->tag = rman_get_bustag(res);
 405         ahb->bsh = rman_get_bushandle(res);
 406         ahb->disc_permitted = ~0;
 407         ahb->tags_permitted = ~0;
 408
 409         return (ahb);
 410 }
 411
 412 static void
 413 ahbfree(struct ahb_softc *ahb)
 414 {
 415         switch (ahb->init_level) {
 416         default:
 417         case 4:
 418                 bus_dmamap_unload(ahb->ecb_dmat, ahb->ecb_dmamap);
 419         case 3:
 420                 bus_dmamem_free(ahb->ecb_dmat, ahb->ecb_array,
 421                                 ahb->ecb_dmamap);
 422                 bus_dmamap_destroy(ahb->ecb_dmat, ahb->ecb_dmamap);
 423         case 2:
 424                 bus_dma_tag_destroy(ahb->ecb_dmat);
 425         case 1:
 426                 bus_dma_tag_destroy(ahb->buffer_dmat);
 427         case 0:
 428         }
 429         free(ahb, M_DEVBUF);
 430 }
 431
 432 /*
 433  * reset board, If it doesn't respond, return failure
 434  */
 435 static int
 436 ahbreset(struct ahb_softc *ahb)
 437 {
 438         int     wait = 1000;    /* 1 sec enough? */
 439         int     test;
 440
 441         if ((ahb_inb(ahb, PORTADDR) & PORTADDR_ENHANCED) == 0) {
 442                 printf("ahb_reset: Controller not in enhanced mode\n");
 443                 return (-1);
 444         }
 445
 446         ahb_outb(ahb, CONTROL, CNTRL_HARD_RST);
 447         DELAY(1000);
 448         ahb_outb(ahb, CONTROL, 0);
 449         while (--wait) {
 450                 DELAY(1000);
 451                 if ((ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_BUSY) == 0)
 452                         break;
 453         }
 454
 455         if (wait == 0) {
 456                 printf("ahbreset: No answer from aha1742 board\n");
 457                 return (-1);
 458         }
 459         if ((test = ahb_inb(ahb, MBOXIN0)) != 0) {
 460                 printf("ahb_reset: self test failed, val = 0x%x\n", test);
 461                 return (-1);
 462         }
 463         while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
 464                 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
 465                 DELAY(10000);
 466         }
 467         return (0);
 468 }
 469
 470 static void
 471 ahbmapecbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 472 {
 473         struct ahb_softc* ahb;
 474
 475         ahb = (struct ahb_softc*)arg;
 476         ahb->ecb_physbase = segs->ds_addr;
 477         /*
 478          * Space for adapter inquiry information is on the
 479          * tail of the ecb array.
 480          */
 481         ahb->ha_inq_physbase = ahbecbvtop(ahb, &ahb->ecb_array[AHB_NECB]);
 482 }
 483
 484 static int
 485 ahbxptattach(struct ahb_softc *ahb)
 486 {
 487         struct cam_devq *devq;
 488         struct ecb *ecb;
 489         u_int  i;
 490
 491         /* Remeber who are we on the scsi bus */
 492         ahb->scsi_id = ahb_inb(ahb, SCSIDEF) & HSCSIID;
 493
 494         /* Use extended translation?? */
 495         ahb->extended_trans = ahb_inb(ahb, RESV1) & EXTENDED_TRANS;
 496
 497         /* Fetch adapter inquiry data */
 498         ecb = ahbecbget(ahb);   /* Always succeeds - no outstanding commands */
 499         ecb->hecb.opcode = ECBOP_READ_HA_INQDATA;
 500         ecb->hecb.flag_word1 = FW1_SUPPRESS_URUN_ERR|FW1_ERR_STATUS_BLK_ONLY;
 501         ecb->hecb.data_ptr = ahb->ha_inq_physbase;
 502         ecb->hecb.data_len = sizeof(struct ha_inquiry_data);
 503         ecb->hecb.sense_ptr = 0;
 504         ecb->state = ECB_ACTIVE;
 505
 506         /* Tell the adapter about this command */
 507         ahbqueuembox(ahb, ahbecbvtop(ahb, ecb),
 508                      ATTN_STARTECB|ahb->scsi_id);
 509
 510         /* Poll for interrupt completion */
 511         for (i = 1000; ecb->state != ECB_FREE && i != 0; i--) {
 512                 ahbintr(ahb);
 513                 DELAY(1000);
 514         }
 515
 516         ahb->num_ecbs = MIN(ahb->num_ecbs,
 517                             ahb->ha_inq_data->scsi_data.reserved[1]);
 518         printf("ahb%ld: %.8s %s SCSI Adapter, FW Rev. %.4s, ID=%d, %d ECBs\n",
 519                ahb->unit, ahb->ha_inq_data->scsi_data.product,
 520                (ahb->ha_inq_data->scsi_data.flags & 0x4) ? "Differential"
 521                                                          : "Single Ended",
 522                ahb->ha_inq_data->scsi_data.revision,
 523                ahb->scsi_id, ahb->num_ecbs);
 524
 525         /* Restore sense paddr for future CCB clients */
 526         ecb->hecb.sense_ptr = ahbsensepaddr(ahbecbvtop(ahb, ecb));
 527
 528         ahbecbfree(ahb, ecb);
 529
 530         /*
 531          * Create the device queue for our SIM.
 532          */
 533         devq = cam_simq_alloc(ahb->num_ecbs);
 534         if (devq == NULL)
 535                 return (ENOMEM);
 536
 537         /*
 538          * Construct our SIM entry
 539          */
 540         ahb->sim = cam_sim_alloc(ahbaction, ahbpoll, "ahb", ahb, ahb->unit,
 541                                  2, ahb->num_ecbs, devq);
 542         if (ahb->sim == NULL) {
 543                 cam_simq_free(devq);
 544                 return (ENOMEM);
 545         }
 546
 547         if (xpt_bus_register(ahb->sim, 0) != CAM_SUCCESS) {
 548                 cam_sim_free(ahb->sim, /*free_devq*/TRUE);
 549                 return (ENXIO);
 550         }
 551
 552         if (xpt_create_path(&ahb->path, /*periph*/NULL,
 553                             cam_sim_path(ahb->sim), CAM_TARGET_WILDCARD,
 554                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 555                 xpt_bus_deregister(cam_sim_path(ahb->sim));
 556                 cam_sim_free(ahb->sim, /*free_devq*/TRUE);
 557                 return (ENXIO);
 558         }
 559
 560         /*
 561          * Allow the board to generate interrupts.
 562          */
 563         ahb_outb(ahb, INTDEF, ahb_inb(ahb, INTDEF) | INTEN);
 564
 565         return (0);
 566 }
 567
 568 static void
 569 ahbhandleimmed(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
 570 {
 571         struct ccb_hdr *ccb_h;
 572         u_int target_id;
 573
 574         if (ahb->immed_cmd == 0) {
 575                 printf("ahb%ld: Immediate Command complete with no "
 576                        " pending command\n", ahb->unit);
 577                 return;
 578         }
 579
 580         target_id = intstat & INTSTAT_TARGET_MASK;
 581
 582         ccb_h = LIST_FIRST(&ahb->pending_ccbs);
 583         while (ccb_h != NULL) {
 584                 struct ecb *pending_ecb;
 585                 union ccb *ccb;
 586
 587                 pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
 588                 ccb = pending_ecb->ccb;
 589                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 590                 if (ccb->ccb_h.target_id == target_id
 591                  || target_id == ahb->scsi_id) {
 592                         untimeout(ahbtimeout, pending_ecb,
 593                                   ccb->ccb_h.timeout_ch);
 594                         LIST_REMOVE(&ccb->ccb_h, sim_links.le);
 595                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 596                                 bus_dmamap_unload(ahb->buffer_dmat,
 597                                                   pending_ecb->dmamap);
 598                         if (pending_ecb == ahb->immed_ecb)
 599                                 ccb->ccb_h.status =
 600                                     CAM_CMD_TIMEOUT|CAM_RELEASE_SIMQ;
 601                         else if (target_id == ahb->scsi_id)
 602                                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 603                         else
 604                                 ccb->ccb_h.status = CAM_BDR_SENT;
 605                         ahbecbfree(ahb, pending_ecb);
 606                         xpt_done(ccb);
 607                 } else if (ahb->immed_ecb != NULL) {
 608                         /* Re-instate timeout */
 609                         ccb->ccb_h.timeout_ch =
 610                             timeout(ahbtimeout, (caddr_t)pending_ecb,
 611                                     (ccb->ccb_h.timeout * hz) / 1000);
 612                 }
 613         }
 614
 615         if (ahb->immed_ecb != NULL) {
 616                 ahb->immed_ecb = NULL;
 617                 printf("ahb%ld: No longer in timeout\n", ahb->unit);
 618         } else if (target_id == ahb->scsi_id)
 619                 printf("ahb%ld: SCSI Bus Reset Delivered\n", ahb->unit);
 620         else
 621                 printf("ahb%ld:  Bus Device Reset Delibered to target %d\n",
 622                        ahb->unit, target_id);
 623
 624         ahb->immed_cmd = 0;
 625 }
 626
 627 static void
 628 ahbcalcresid(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
 629 {
 630         if (ecb->status.data_overrun != 0) {
 631                 /*
 632                  * Overrun Condition.  The hardware doesn't
 633                  * provide a meaningful byte count in this case
 634                  * (the residual is always 0).  Tell the XPT
 635                  * layer about the error.
 636                  */
 637                 ccb->ccb_h.status = CAM_DATA_RUN_ERR;
 638         } else {
 639                 ccb->csio.resid = ecb->status.resid_count;
 640
 641                 if ((ecb->hecb.flag_word1 & FW1_SG_ECB) != 0) {
 642                         /*
 643                          * For S/G transfers, the adapter provides a pointer
 644                          * to the address in the last S/G element used and a
 645                          * residual for that element.  So, we need to sum up
 646                          * the elements that follow it in order to get a real
 647                          * residual number.  If we have an overrun, the residual
 648                          * reported will be 0 and we already know that all S/G
 649                          * segments have been exhausted, so we can skip this
 650                          * step.
 651                          */
 652                         ahb_sg_t *sg;
 653                         int       num_sg;
 654
 655                         num_sg = ecb->hecb.data_len / sizeof(ahb_sg_t);
 656
 657                         /* Find the S/G the adapter was working on */
 658                         for (sg = ecb->sg_list;
 659                              num_sg != 0 && sg->addr != ecb->status.resid_addr;
 660                              num_sg--, sg++)
 661                                 ;
 662
 663                         /* Skip it */
 664                         num_sg--;
 665                         sg++;
 666
 667                         /* Sum the rest */
 668                         for (; num_sg != 0; num_sg--, sg++)
 669                                 ccb->csio.resid += sg->len;
 670                 }
 671                 /* Underruns are not errors */
 672                 ccb->ccb_h.status = CAM_REQ_CMP;
 673         }
 674 }
 675
 676 static void
 677 ahbprocesserror(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
 678 {
 679         struct hardware_ecb *hecb;
 680         struct ecb_status *status;
 681
 682         hecb = &ecb->hecb;
 683         status = &ecb->status;
 684         switch (status->ha_status) {
 685         case HS_OK:
 686                 ccb->csio.scsi_status = status->scsi_status;
 687                 if (status->scsi_status != 0) {
 688                         ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 689                         if (status->sense_stored) {
 690                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 691                                 ccb->csio.sense_resid =
 692                                     ccb->csio.sense_len - status->sense_len;
 693                                 bcopy(&ecb->sense, &ccb->csio.sense_data,
 694                                       status->sense_len);
 695                         }
 696                 }
 697                 break;
 698         case HS_TARGET_NOT_ASSIGNED:
 699                 ccb->ccb_h.status = CAM_PATH_INVALID;
 700                 break;
 701         case HS_SEL_TIMEOUT:
 702                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
 703                 break;
 704         case HS_DATA_RUN_ERR:
 705                 ahbcalcresid(ahb, ecb, ccb);
 706                 break;
 707         case HS_UNEXPECTED_BUSFREE:
 708                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
 709                 break;
 710         case HS_INVALID_PHASE:
 711                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
 712                 break;
 713         case HS_REQUEST_SENSE_FAILED:
 714                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
 715                 break;
 716         case HS_TAG_MSG_REJECTED:
 717         {
 718                 struct ccb_trans_settings neg;
 719
 720                 xpt_print_path(ccb->ccb_h.path);
 721                 printf("refuses tagged commands.  Performing "
 722                        "non-tagged I/O\n");
 723                 neg.flags = 0;
 724                 neg.valid = CCB_TRANS_TQ_VALID;
 725                 xpt_setup_ccb(&neg.ccb_h, ccb->ccb_h.path, /*priority*/1);
 726                 xpt_async(AC_TRANSFER_NEG, ccb->ccb_h.path, &neg);
 727                 ahb->tags_permitted &= ~(0x01 << ccb->ccb_h.target_id);
 728                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
 729                 break;
 730         }
 731         case HS_FIRMWARE_LOAD_REQ:
 732         case HS_HARDWARE_ERR:
 733                 /*
 734                  * Tell the system that the Adapter
 735                  * is no longer functional.
 736                  */
 737                 ccb->ccb_h.status = CAM_NO_HBA;
 738                 break;
 739         case HS_CMD_ABORTED_HOST:
 740         case HS_CMD_ABORTED_ADAPTER:
 741         case HS_ATN_TARGET_FAILED:
 742         case HS_SCSI_RESET_ADAPTER:
 743         case HS_SCSI_RESET_INCOMING:
 744                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 745                 break;
 746         case HS_INVALID_ECB_PARAM:
 747                 printf("ahb%ld: opcode 0x%02x, flag_word1 0x%02x, flag_word2 0x%02x\n",
 748                         ahb->unit, hecb->opcode, hecb->flag_word1, hecb->flag_word2);
 749                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 750                 break;
 751         case HS_DUP_TCB_RECEIVED:
 752         case HS_INVALID_OPCODE:
 753         case HS_INVALID_CMD_LINK:
 754         case HS_PROGRAM_CKSUM_ERROR:
 755                 panic("ahb%ld: Can't happen host status %x occurred",
 756                       ahb->unit, status->ha_status);
 757                 break;
 758         }
 759         if (ccb->ccb_h.status != CAM_REQ_CMP) {
 760                 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 761                 ccb->ccb_h.status |= CAM_DEV_QFRZN;
 762         }
 763 }
 764
 765 static void
 766 ahbdone(struct ahb_softc *ahb, u_int32_t mbox, u_int intstat)
 767 {
 768         struct ecb *ecb;
 769         union ccb *ccb;
 770
 771         ecb = ahbecbptov(ahb, mbox);
 772
 773         if ((ecb->state & ECB_ACTIVE) == 0)
 774                 panic("ecb not active");
 775
 776         ccb = ecb->ccb;
 777
 778         if (ccb != NULL) {
 779                 untimeout(ahbtimeout, ecb, ccb->ccb_h.timeout_ch);
 780                 LIST_REMOVE(&ccb->ccb_h, sim_links.le);
 781
 782                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 783                         bus_dmasync_op_t op;
 784
 785                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 786                                 op = BUS_DMASYNC_POSTREAD;
 787                         else
 788                                 op = BUS_DMASYNC_POSTWRITE;
 789                         bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
 790                         bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
 791                 }
 792
 793                 if ((intstat & INTSTAT_MASK) == INTSTAT_ECB_OK) {
 794                         ccb->ccb_h.status = CAM_REQ_CMP;
 795                         ccb->csio.resid = 0;
 796                 } else {
 797                         ahbprocesserror(ahb, ecb, ccb);
 798                 }
 799                 ahbecbfree(ahb, ecb);
 800                 xpt_done(ccb);
 801         } else {
 802                 /* Non CCB Command */
 803                 if ((intstat & INTSTAT_MASK) != INTSTAT_ECB_OK) {
 804                         printf("ahb%ld: Command 0%x Failed %x:%x:%x\n",
 805                                ahb->unit, ecb->hecb.opcode,
 806                                *((u_int16_t*)&ecb->status),
 807                                ecb->status.ha_status, ecb->status.resid_count);
 808                 }
 809                 /* Client owns this ECB and will release it. */
 810         }
 811 }
 812
 813 /*
 814  * Catch an interrupt from the adaptor
 815  */
 816 static void
 817 ahbintr(void *arg)
 818 {
 819         struct    ahb_softc *ahb;
 820         u_int     intstat;
 821         u_int32_t mbox;
 822
 823         ahb = (struct ahb_softc *)arg;
 824
 825         while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
 826                 /*
 827                  * Fetch information about this interrupt.
 828                  */
 829                 intstat = ahb_inb(ahb, INTSTAT);
 830                 mbox = ahb_inl(ahb, MBOXIN0);
 831
 832                 /*
 833                  * Reset interrupt latch.
 834                  */
 835                 ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
 836
 837                 /*
 838                  * Process the completed operation
 839                  */
 840                 switch (intstat & INTSTAT_MASK) {
 841                 case INTSTAT_ECB_OK:
 842                 case INTSTAT_ECB_CMPWRETRY:
 843                 case INTSTAT_ECB_CMPWERR:
 844                         ahbdone(ahb, mbox, intstat);
 845                         break;
 846                 case INTSTAT_AEN_OCCURED:
 847                         if ((intstat & INTSTAT_TARGET_MASK) == ahb->scsi_id) {
 848                                 /* Bus Reset */
 849                                 xpt_print_path(ahb->path);
 850                                 switch (mbox) {
 851                                 case HS_SCSI_RESET_ADAPTER:
 852                                         printf("Host Adapter Initiated "
 853                                                "Bus Reset occurred\n");
 854                                         break;
 855                                 case HS_SCSI_RESET_INCOMING:
 856                                         printf("Bus Reset Initiated "
 857                                                "by another device occurred\n");
 858                                         break;
 859                                 }
 860                                 /* Notify the XPT */
 861                                 xpt_async(AC_BUS_RESET, ahb->path, NULL);
 862                                 break;
 863                         }
 864                         printf("Unsupported initiator selection AEN occured\n");
 865                         break;
 866                 case INTSTAT_IMMED_OK:
 867                 case INTSTAT_IMMED_ERR:
 868                         ahbhandleimmed(ahb, mbox, intstat);
 869                         break;
 870                 case INTSTAT_HW_ERR:
 871                         panic("Unrecoverable hardware Error Occurred\n");
 872                 }
 873         }
 874 }
 875
 876 static void
 877 ahbexecuteecb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 878 {
 879         struct    ecb *ecb;
 880         union     ccb *ccb;
 881         struct    ahb_softc *ahb;
 882         u_int32_t ecb_paddr;
 883         int       s;
 884
 885         ecb = (struct ecb *)arg;
 886         ccb = ecb->ccb;
 887         ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
 888
 889         if (error != 0) {
 890                 if (error != EFBIG)
 891                         printf("ahb%ld: Unexepected error 0x%x returned from "
 892                                "bus_dmamap_load\n", ahb->unit, error);
 893                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 894                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 895                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 896                 }
 897                 ahbecbfree(ahb, ecb);
 898                 xpt_done(ccb);
 899                 return;
 900         }
 901
 902         ecb_paddr = ahbecbvtop(ahb, ecb);
 903
 904         if (nseg != 0) {
 905                 ahb_sg_t *sg;
 906                 bus_dma_segment_t *end_seg;
 907                 bus_dmasync_op_t op;
 908
 909                 end_seg = dm_segs + nseg;
 910
 911                 /* Copy the segments into our SG list */
 912                 sg = ecb->sg_list;
 913                 while (dm_segs < end_seg) {
 914                         sg->addr = dm_segs->ds_addr;
 915                         sg->len = dm_segs->ds_len;
 916                         sg++;
 917                         dm_segs++;
 918                 }
 919
 920                 if (nseg > 1) {
 921                         ecb->hecb.flag_word1 |= FW1_SG_ECB;
 922                         ecb->hecb.data_ptr = ahbsgpaddr(ecb_paddr);
 923                         ecb->hecb.data_len = sizeof(ahb_sg_t) * nseg;
 924                 } else {
 925                         ecb->hecb.data_ptr = ecb->sg_list->addr;
 926                         ecb->hecb.data_len = ecb->sg_list->len;
 927                 }
 928
 929                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
 930 /*                      ecb->hecb.flag_word2 |= FW2_DATA_DIR_IN; */
 931                         op = BUS_DMASYNC_PREREAD;
 932                 } else {
 933                         op = BUS_DMASYNC_PREWRITE;
 934                 }
 935                 /* ecb->hecb.flag_word2 |= FW2_CHECK_DATA_DIR; */
 936
 937                 bus_dmamap_sync(ahb->buffer_dmat, ecb->dmamap, op);
 938
 939         } else {
 940                 ecb->hecb.data_ptr = 0;
 941                 ecb->hecb.data_len = 0;
 942         }
 943
 944         s = splcam();
 945
 946         /*
 947          * Last time we need to check if this CCB needs to
 948          * be aborted.
 949          */
 950         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 951                 if (nseg != 0)
 952                         bus_dmamap_unload(ahb->buffer_dmat, ecb->dmamap);
 953                 ahbecbfree(ahb, ecb);
 954                 xpt_done(ccb);
 955                 splx(s);
 956                 return;
 957         }
 958
 959         ecb->state = ECB_ACTIVE;
 960         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 961         LIST_INSERT_HEAD(&ahb->pending_ccbs, &ccb->ccb_h, sim_links.le);
 962
 963         /* Tell the adapter about this command */
 964         ahbqueuembox(ahb, ecb_paddr, ATTN_STARTECB|ccb->ccb_h.target_id);
 965
 966         ccb->ccb_h.timeout_ch = timeout(ahbtimeout, (caddr_t)ecb,
 967                                         (ccb->ccb_h.timeout * hz) / 1000);
 968         splx(s);
 969 }
 970
 971 static void
 972 ahbaction(struct cam_sim *sim, union ccb *ccb)
 973 {
 974         struct  ahb_softc *ahb;
 975
 976         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahbaction\n"));
 977
 978         ahb = (struct ahb_softc *)cam_sim_softc(sim);
 979
 980         switch (ccb->ccb_h.func_code) {
 981         /* Common cases first */
 982         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 983         {
 984                 struct ecb *ecb;
 985                 struct hardware_ecb *hecb;
 986
 987                 /*
 988                  * get an ecb to use.
 989                  */
 990                 if ((ecb = ahbecbget(ahb)) == NULL) {
 991                         /* Should never occur */
 992                         panic("Failed to get an ecb");
 993                 }
 994
 995                 /*
 996                  * So we can find the ECB when an abort is requested
 997                  */
 998                 ecb->ccb = ccb;
 999                 ccb->ccb_h.ccb_ecb_ptr = ecb;
1000                 ccb->ccb_h.ccb_ahb_ptr = ahb;
1001
1002                 /*
1003                  * Put all the arguments for the xfer in the ecb
1004                  */
1005                 hecb = &ecb->hecb;
1006                 hecb->opcode = ECBOP_INITIATOR_SCSI_CMD;
1007                 hecb->flag_word1 = FW1_AUTO_REQUEST_SENSE
1008                                  | FW1_ERR_STATUS_BLK_ONLY;
1009                 hecb->flag_word2 = ccb->ccb_h.target_lun
1010                                  | FW2_NO_RETRY_ON_BUSY;
1011                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
1012                         hecb->flag_word2 |= FW2_TAG_ENB
1013                                          | ((ccb->csio.tag_action & 0x3)
1014                                             << FW2_TAG_TYPE_SHIFT);
1015                 }
1016                 if ((ccb->ccb_h.flags & CAM_DIS_DISCONNECT) != 0)
1017                         hecb->flag_word2 |= FW2_DISABLE_DISC;
1018                 hecb->sense_len = ccb->csio.sense_len;
1019                 hecb->cdb_len = ccb->csio.cdb_len;
1020                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
1021                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
1022                                 bcopy(ccb->csio.cdb_io.cdb_ptr,
1023                                       hecb->cdb, hecb->cdb_len);
1024                         } else {
1025                                 /* I guess I could map it in... */
1026                                 ccb->ccb_h.status = CAM_REQ_INVALID;
1027                                 ahbecbfree(ahb, ecb);
1028                                 xpt_done(ccb);
1029                                 return;
1030                         }
1031                 } else {
1032                         bcopy(ccb->csio.cdb_io.cdb_bytes,
1033                               hecb->cdb, hecb->cdb_len);
1034                 }
1035
1036                 /*
1037                  * If we have any data to send with this command,
1038                  * map it into bus space.
1039                  */
1040                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1041                         if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
1042                                 /*
1043                                  * We've been given a pointer
1044                                  * to a single buffer.
1045                                  */
1046                                 if ((ccb->ccb_h.flags & CAM_DATA_PHYS)==0) {
1047                                         int s;
1048                                         int error;
1049
1050                                         s = splsoftvm();
1051                                         error = bus_dmamap_load(
1052                                             ahb->buffer_dmat,
1053                                             ecb->dmamap,
1054                                             ccb->csio.data_ptr,
1055                                             ccb->csio.dxfer_len,
1056                                             ahbexecuteecb,
1057                                             ecb, /*flags*/0);
1058                                         if (error == EINPROGRESS) {
1059                                                 /*
1060                                                  * So as to maintain ordering,
1061                                                  * freeze the controller queue
1062                                                  * until our mapping is
1063                                                  * returned.
1064                                                  */
1065                                                 xpt_freeze_simq(ahb->sim, 1);
1066                                                 ccb->ccb_h.status |=
1067                                                     CAM_RELEASE_SIMQ;
1068                                         }
1069                                         splx(s);
1070                                 } else {
1071                                         struct bus_dma_segment seg;
1072
1073                                         /* Pointer to physical buffer */
1074                                         seg.ds_addr =
1075                                             (bus_addr_t)ccb->csio.data_ptr;
1076                                         seg.ds_len = ccb->csio.dxfer_len;
1077                                         ahbexecuteecb(ecb, &seg, 1, 0);
1078                                 }
1079                         } else {
1080                                 struct bus_dma_segment *segs;
1081
1082                                 if ((ccb->ccb_h.flags & CAM_DATA_PHYS) != 0)
1083                                         panic("ahbaction - Physical segment "
1084                                               "pointers unsupported");
1085
1086                                 if ((ccb->ccb_h.flags & CAM_SG_LIST_PHYS) == 0)
1087                                         panic("btaction - Virtual segment "
1088                                               "addresses unsupported");
1089
1090                                 /* Just use the segments provided */
1091                                 segs = (struct bus_dma_segment *)
1092                                     ccb->csio.data_ptr;
1093                                 ahbexecuteecb(ecb, segs, ccb->csio.sglist_cnt,
1094                                              0);
1095                         }
1096                 } else {
1097                         ahbexecuteecb(ecb, NULL, 0, 0);
1098                 }
1099                 break;
1100         }
1101         case XPT_EN_LUN:                /* Enable LUN as a target */
1102         case XPT_TARGET_IO:             /* Execute target I/O request */
1103         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
1104         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
1105         case XPT_ABORT:                 /* Abort the specified CCB */
1106                 /* XXX Implement */
1107                 ccb->ccb_h.status = CAM_REQ_INVALID;
1108                 xpt_done(ccb);
1109                 break;
1110         case XPT_SET_TRAN_SETTINGS:
1111         {
1112                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1113                 xpt_done(ccb);
1114                 break;
1115         }
1116         case XPT_GET_TRAN_SETTINGS:
1117         /* Get default/user set transfer settings for the target */
1118         {
1119                 struct  ccb_trans_settings *cts;
1120                 u_int   target_mask;
1121
1122                 cts = &ccb->cts;
1123                 target_mask = 0x01 << ccb->ccb_h.target_id;
1124                 if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
1125                         cts->flags = 0;
1126                         if ((ahb->disc_permitted & target_mask) != 0)
1127                                 cts->flags |= CCB_TRANS_DISC_ENB;
1128                         if ((ahb->tags_permitted & target_mask) != 0)
1129                                 cts->flags |= CCB_TRANS_TAG_ENB;
1130                         cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1131                         cts->sync_period = 25; /* 10MHz */
1132
1133                         if (cts->sync_period != 0)
1134                                 cts->sync_offset = 15;
1135
1136                         cts->valid = CCB_TRANS_SYNC_RATE_VALID
1137                                    | CCB_TRANS_SYNC_OFFSET_VALID
1138                                    | CCB_TRANS_BUS_WIDTH_VALID
1139                                    | CCB_TRANS_DISC_VALID
1140                                    | CCB_TRANS_TQ_VALID;
1141                         ccb->ccb_h.status = CAM_REQ_CMP;
1142                 } else {
1143                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1144                 }
1145                 xpt_done(ccb);
1146                 break;
1147         }
1148         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
1149         {
1150                 int i;
1151                 int s;
1152
1153                 s = splcam();
1154                 ahb->immed_cmd = IMMED_RESET;
1155                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1156                 /* Poll for interrupt completion */
1157                 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--) {
1158                         DELAY(1000);
1159                         ahbintr(cam_sim_softc(sim));
1160                 }
1161                 splx(s);
1162                 break;
1163         }
1164         case XPT_CALC_GEOMETRY:
1165         {
1166                 struct    ccb_calc_geometry *ccg;
1167                 u_int32_t size_mb;
1168                 u_int32_t secs_per_cylinder;
1169
1170                 ccg = &ccb->ccg;
1171                 size_mb = ccg->volume_size
1172                         / ((1024L * 1024L) / ccg->block_size);
1173
1174                 if (size_mb > 1024 && (ahb->extended_trans != 0)) {
1175                         ccg->heads = 255;
1176                         ccg->secs_per_track = 63;
1177                 } else {
1178                         ccg->heads = 64;
1179                         ccg->secs_per_track = 32;
1180                 }
1181                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1182                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1183                 ccb->ccb_h.status = CAM_REQ_CMP;
1184                 xpt_done(ccb);
1185                 break;
1186         }
1187         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1188         {
1189                 int i;
1190
1191                 ahb->immed_cmd = IMMED_RESET;
1192                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1193                 /* Poll for interrupt completion */
1194                 for (i = 1000; ahb->immed_cmd != 0 && i != 0; i--)
1195                         DELAY(1000);
1196                 ccb->ccb_h.status = CAM_REQ_CMP;
1197                 xpt_done(ccb);
1198                 break;
1199         }
1200         case XPT_TERM_IO:               /* Terminate the I/O process */
1201                 /* XXX Implement */
1202                 ccb->ccb_h.status = CAM_REQ_INVALID;
1203                 xpt_done(ccb);
1204                 break;
1205         case XPT_PATH_INQ:              /* Path routing inquiry */
1206         {
1207                 struct ccb_pathinq *cpi = &ccb->cpi;
1208
1209                 cpi->version_num = 1; /* XXX??? */
1210                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1211                 cpi->target_sprt = 0;
1212                 cpi->hba_misc = 0;
1213                 cpi->hba_eng_cnt = 0;
1214                 cpi->max_target = 7;
1215                 cpi->max_lun = 7;
1216                 cpi->initiator_id = ahb->scsi_id;
1217                 cpi->bus_id = cam_sim_bus(sim);
1218                 cpi->base_transfer_speed = 3300;
1219                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1220                 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
1221                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1222                 cpi->unit_number = cam_sim_unit(sim);
1223                 cpi->ccb_h.status = CAM_REQ_CMP;
1224                 xpt_done(ccb);
1225                 break;
1226         }
1227 #if 0
1228         /* Need these??? */
1229         case XPT_IMMED_NOTIFY:          /* Notify Host Target driver of event */
1230         case XPT_NOTIFY_ACK:            /* Acknowledgement of event */
1231 #endif
1232         default:
1233                 ccb->ccb_h.status = CAM_REQ_INVALID;
1234                 xpt_done(ccb);
1235                 break;
1236         }
1237 }
1238
1239 static void
1240 ahbpoll(struct cam_sim *sim)
1241 {
1242         ahbintr(cam_sim_softc(sim));
1243 }
1244
1245 static void
1246 ahbtimeout(void *arg)
1247 {
1248         struct ecb       *ecb;
1249         union  ccb       *ccb;
1250         struct ahb_softc *ahb;
1251         int               s;
1252
1253         ecb = (struct ecb *)arg;
1254         ccb = ecb->ccb;
1255         ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
1256         xpt_print_path(ccb->ccb_h.path);
1257         printf("ECB %p - timed out\n", (void *)ecb);
1258
1259         s = splcam();
1260
1261         if ((ecb->state & ECB_ACTIVE) == 0) {
1262                 xpt_print_path(ccb->ccb_h.path);
1263                 printf("ECB %p - timed out ECB already completed\n",
1264                        (void *)ecb);
1265                 splx(s);
1266                 return;
1267         }
1268         /*
1269          * In order to simplify the recovery process, we ask the XPT
1270          * layer to halt the queue of new transactions and we traverse
1271          * the list of pending CCBs and remove their timeouts. This
1272          * means that the driver attempts to clear only one error
1273          * condition at a time.  In general, timeouts that occur
1274          * close together are related anyway, so there is no benefit
1275          * in attempting to handle errors in parrallel.  Timeouts will
1276          * be reinstated when the recovery process ends.
1277          */
1278         if ((ecb->state & ECB_DEVICE_RESET) == 0) {
1279                 struct ccb_hdr *ccb_h;
1280
1281                 if ((ecb->state & ECB_RELEASE_SIMQ) == 0) {
1282                         xpt_freeze_simq(ahb->sim, /*count*/1);
1283                         ecb->state |= ECB_RELEASE_SIMQ;
1284                 }
1285
1286                 ccb_h = LIST_FIRST(&ahb->pending_ccbs);
1287                 while (ccb_h != NULL) {
1288                         struct ecb *pending_ecb;
1289
1290                         pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
1291                         untimeout(ahbtimeout, pending_ecb, ccb_h->timeout_ch);
1292                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1293                 }
1294
1295                 /* Store for our interrupt handler */
1296                 ahb->immed_ecb = ecb;
1297
1298                 /*
1299                  * Send a Bus Device Reset message:
1300                  * The target that is holding up the bus may not
1301                  * be the same as the one that triggered this timeout
1302                  * (different commands have different timeout lengths),
1303                  * but we have no way of determining this from our
1304                  * timeout handler.  Our strategy here is to queue a
1305                  * BDR message to the target of the timed out command.
1306                  * If this fails, we'll get another timeout 2 seconds
1307                  * later which will attempt a bus reset.
1308                  */
1309                 xpt_print_path(ccb->ccb_h.path);
1310                 printf("Queuing BDR\n");
1311                 ecb->state |= ECB_DEVICE_RESET;
1312                 ccb->ccb_h.timeout_ch =
1313                     timeout(ahbtimeout, (caddr_t)ecb, 2 * hz);
1314
1315                 ahb->immed_cmd = IMMED_RESET;
1316                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
1317         } else if ((ecb->state & ECB_SCSIBUS_RESET) != 0) {
1318                 /*
1319                  * Try a SCSI bus reset.  We do this only if we
1320                  * have already attempted to clear the condition with a BDR.
1321                  */
1322                 xpt_print_path(ccb->ccb_h.path);
1323                 printf("Attempting SCSI Bus reset\n");
1324                 ecb->state |= ECB_SCSIBUS_RESET;
1325                 ccb->ccb_h.timeout_ch =
1326                     timeout(ahbtimeout, (caddr_t)ecb, 2 * hz);
1327                 ahb->immed_cmd = IMMED_RESET;
1328                 ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
1329         } else {
1330                 /* Bring out the hammer... */
1331                 ahbreset(ahb);
1332
1333                 /* Simulate the reset complete interrupt */
1334                 ahbhandleimmed(ahb, 0, ahb->scsi_id|INTSTAT_IMMED_OK);
1335         }
1336
1337         splx(s);
1338 }
1339
1340 static device_method_t ahb_eisa_methods[] = {
1341         /* Device interface */
1342         DEVMETHOD(device_probe,         ahbprobe),
1343         DEVMETHOD(device_attach,        ahbattach),
1344
1345         { 0, 0 }
1346 };
1347
1348 static driver_t ahb_eisa_driver = {
1349         "ahb",
1350         ahb_eisa_methods,
1351         1,                      /* unused */
1352 };
1353
1354 static devclass_t ahb_devclass;
1355
1356 DRIVER_MODULE(ahb, eisa, ahb_eisa_driver, ahb_devclass, 0, 0);