sys/dev/aha/aha.c

   1 /*
   2  * Generic register and struct definitions for the Adaptech 154x/164x
   3  * SCSI host adapters. Product specific probe and attach routines can
   4  * be found in:
   5  *      aha 1542A/1542B/1542C/1542CF/1542CP     aha_isa.c
   6  *      aha 1640                        aha_mca.c
   7  */
   8 /*-
   9  * Copyright (c) 1998 M. Warner Losh.
  10  * All Rights Reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * Derived from bt.c written by:
  34  *
  35  * Copyright (c) 1998 Justin T. Gibbs.
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions, and the following disclaimer,
  43  *    without modification, immediately at the beginning of the file.
  44  * 2. The name of the author may not be used to endorse or promote products
  45  *    derived from this software without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  51  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  */
  59
  60 #include <sys/cdefs.h>
  61 __FBSDID("$FreeBSD$");
  62
  63 #include <sys/param.h>
  64 #include <sys/conf.h>
  65 #include <sys/bus.h>
  66 #include <sys/systm.h>
  67 #include <sys/malloc.h>
  68 #include <sys/kernel.h>
  69 #include <sys/lock.h>
  70 #include <sys/module.h>
  71 #include <sys/mutex.h>
  72 #include <sys/rman.h>
  73
  74 #include <machine/bus.h>
  75
  76 #include <cam/cam.h>
  77 #include <cam/cam_ccb.h>
  78 #include <cam/cam_sim.h>
  79 #include <cam/cam_xpt_sim.h>
  80 #include <cam/cam_debug.h>
  81
  82 #include <cam/scsi/scsi_message.h>
  83
  84 #include <dev/aha/ahareg.h>
  85
  86 #define PRVERB(x) do { if (bootverbose) device_printf x; } while (0)
  87
  88 /* Macro to determine that a rev is potentially a new valid one
  89  * so that the driver doesn't keep breaking on new revs as it
  90  * did for the CF and CP.
  91  */
  92 #define PROBABLY_NEW_BOARD(REV) (REV > 0x43 && REV < 0x56)
  93
  94 /* MailBox Management functions */
  95 static __inline void    ahanextinbox(struct aha_softc *aha);
  96 static __inline void    ahanextoutbox(struct aha_softc *aha);
  97
  98 #define aha_name(aha)   device_get_nameunit(aha->dev)
  99
 100 static __inline void
 101 ahanextinbox(struct aha_softc *aha)
 102 {
 103         if (aha->cur_inbox == aha->last_inbox)
 104                 aha->cur_inbox = aha->in_boxes;
 105         else
 106                 aha->cur_inbox++;
 107 }
 108
 109 static __inline void
 110 ahanextoutbox(struct aha_softc *aha)
 111 {
 112         if (aha->cur_outbox == aha->last_outbox)
 113                 aha->cur_outbox = aha->out_boxes;
 114         else
 115                 aha->cur_outbox++;
 116 }
 117
 118 #define ahautoa24(u,s3)                 \
 119         (s3)[0] = ((u) >> 16) & 0xff;   \
 120         (s3)[1] = ((u) >> 8) & 0xff;    \
 121         (s3)[2] = (u) & 0xff;
 122
 123 #define aha_a24tou(s3) \
 124         (((s3)[0] << 16) | ((s3)[1] << 8) | (s3)[2])
 125
 126 /* CCB Management functions */
 127 static __inline uint32_t                ahaccbvtop(struct aha_softc *aha,
 128                                                   struct aha_ccb *accb);
 129 static __inline struct aha_ccb*         ahaccbptov(struct aha_softc *aha,
 130                                                   uint32_t ccb_addr);
 131
 132 static __inline uint32_t
 133 ahaccbvtop(struct aha_softc *aha, struct aha_ccb *accb)
 134 {
 135         return (aha->aha_ccb_physbase
 136               + (uint32_t)((caddr_t)accb - (caddr_t)aha->aha_ccb_array));
 137 }
 138 static __inline struct aha_ccb *
 139 ahaccbptov(struct aha_softc *aha, uint32_t ccb_addr)
 140 {
 141         return (aha->aha_ccb_array +
 142               + ((struct aha_ccb*)(uintptr_t)ccb_addr -
 143                  (struct aha_ccb*)(uintptr_t)aha->aha_ccb_physbase));
 144 }
 145
 146 static struct aha_ccb*  ahagetccb(struct aha_softc *aha);
 147 static __inline void    ahafreeccb(struct aha_softc *aha, struct aha_ccb *accb);
 148 static void             ahaallocccbs(struct aha_softc *aha);
 149 static bus_dmamap_callback_t ahaexecuteccb;
 150 static void             ahadone(struct aha_softc *aha, struct aha_ccb *accb,
 151                                aha_mbi_comp_code_t comp_code);
 152 static void             aha_intr_locked(struct aha_softc *aha);
 153
 154 /* Host adapter command functions */
 155 static int      ahareset(struct aha_softc* aha, int hard_reset);
 156
 157 /* Initialization functions */
 158 static int                      ahainitmboxes(struct aha_softc *aha);
 159 static bus_dmamap_callback_t    ahamapmboxes;
 160 static bus_dmamap_callback_t    ahamapccbs;
 161 static bus_dmamap_callback_t    ahamapsgs;
 162
 163 /* Transfer Negotiation Functions */
 164 static void ahafetchtransinfo(struct aha_softc *aha,
 165                              struct ccb_trans_settings *cts);
 166
 167 /* CAM SIM entry points */
 168 #define ccb_accb_ptr spriv_ptr0
 169 #define ccb_aha_ptr spriv_ptr1
 170 static void     ahaaction(struct cam_sim *sim, union ccb *ccb);
 171 static void     ahapoll(struct cam_sim *sim);
 172
 173 /* Our timeout handler */
 174 static void     ahatimeout(void *arg);
 175
 176 /* Exported functions */
 177 void
 178 aha_alloc(struct aha_softc *aha)
 179 {
 180
 181         SLIST_INIT(&aha->free_aha_ccbs);
 182         LIST_INIT(&aha->pending_ccbs);
 183         SLIST_INIT(&aha->sg_maps);
 184         aha->ccb_sg_opcode = INITIATOR_SG_CCB_WRESID;
 185         aha->ccb_ccb_opcode = INITIATOR_CCB_WRESID;
 186         mtx_init(&aha->lock, "aha", NULL, MTX_DEF);
 187 }
 188
 189 void
 190 aha_free(struct aha_softc *aha)
 191 {
 192         switch (aha->init_level) {
 193         default:
 194         case 8:
 195         {
 196                 struct sg_map_node *sg_map;
 197
 198                 while ((sg_map = SLIST_FIRST(&aha->sg_maps))!= NULL) {
 199                         SLIST_REMOVE_HEAD(&aha->sg_maps, links);
 200                         bus_dmamap_unload(aha->sg_dmat, sg_map->sg_dmamap);
 201                         bus_dmamem_free(aha->sg_dmat, sg_map->sg_vaddr,
 202                             sg_map->sg_dmamap);
 203                         free(sg_map, M_DEVBUF);
 204                 }
 205                 bus_dma_tag_destroy(aha->sg_dmat);
 206         }
 207         case 7:
 208                 bus_dmamap_unload(aha->ccb_dmat, aha->ccb_dmamap);
 209         case 6:
 210                 bus_dmamem_free(aha->ccb_dmat, aha->aha_ccb_array,
 211                     aha->ccb_dmamap);
 212         case 5:
 213                 bus_dma_tag_destroy(aha->ccb_dmat);
 214         case 4:
 215                 bus_dmamap_unload(aha->mailbox_dmat, aha->mailbox_dmamap);
 216         case 3:
 217                 bus_dmamem_free(aha->mailbox_dmat, aha->in_boxes,
 218                     aha->mailbox_dmamap);
 219         case 2:
 220                 bus_dma_tag_destroy(aha->buffer_dmat);
 221         case 1:
 222                 bus_dma_tag_destroy(aha->mailbox_dmat);
 223         case 0:
 224                 break;
 225         }
 226         mtx_destroy(&aha->lock);
 227 }
 228
 229 /*
 230  * Probe the adapter and verify that the card is an Adaptec.
 231  */
 232 int
 233 aha_probe(struct aha_softc* aha)
 234 {
 235         u_int    status;
 236         u_int    intstat;
 237         int      error;
 238         board_id_data_t board_id;
 239
 240         /*
 241          * See if the three I/O ports look reasonable.
 242          * Touch the minimal number of registers in the
 243          * failure case.
 244          */
 245         status = aha_inb(aha, STATUS_REG);
 246         if ((status == 0) ||
 247             (status & (DIAG_ACTIVE|CMD_REG_BUSY | STATUS_REG_RSVD)) != 0) {
 248                 PRVERB((aha->dev, "status reg test failed %x\n", status));
 249                 return (ENXIO);
 250         }
 251
 252         intstat = aha_inb(aha, INTSTAT_REG);
 253         if ((intstat & INTSTAT_REG_RSVD) != 0) {
 254                 PRVERB((aha->dev, "Failed Intstat Reg Test\n"));
 255                 return (ENXIO);
 256         }
 257
 258         /*
 259          * Looking good so far.  Final test is to reset the
 260          * adapter and fetch the board ID and ensure we aren't
 261          * looking at a BusLogic.
 262          */
 263         if ((error = ahareset(aha, /*hard_reset*/TRUE)) != 0) {
 264                 PRVERB((aha->dev, "Failed Reset\n"));
 265                 return (ENXIO);
 266         }
 267
 268         /*
 269          * Get the board ID.  We use this to see if we're dealing with
 270          * a buslogic card or an aha card (or clone).
 271          */
 272         error = aha_cmd(aha, AOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
 273             (uint8_t*)&board_id, sizeof(board_id), DEFAULT_CMD_TIMEOUT);
 274         if (error != 0) {
 275                 PRVERB((aha->dev, "INQUIRE failed %x\n", error));
 276                 return (ENXIO);
 277         }
 278         aha->fw_major = board_id.firmware_rev_major;
 279         aha->fw_minor = board_id.firmware_rev_minor;
 280         aha->boardid = board_id.board_type;
 281
 282         /*
 283          * The Buslogic cards have an id of either 0x41 or 0x42.  So
 284          * if those come up in the probe, we test the geometry register
 285          * of the board.  Adaptec boards that are this old will not have
 286          * this register, and return 0xff, while buslogic cards will return
 287          * something different.
 288          *
 289          * It appears that for reasons unknow, for the for the
 290          * aha-1542B cards, we need to wait a little bit before trying
 291          * to read the geometry register.  I picked 10ms since we have
 292          * reports that a for loop to 1000 did the trick, and this
 293          * errs on the side of conservatism.  Besides, no one will
 294          * notice a 10mS delay here, even the 1542B card users :-)
 295          *
 296          * Some compatible cards return 0 here.  Some cards also
 297          * seem to return 0x7f.
 298          *
 299          * XXX I'm not sure how this will impact other cloned cards
 300          *
 301          * This really should be replaced with the esetup command, since
 302          * that appears to be more reliable.  This becomes more and more
 303          * true over time as we discover more cards that don't read the
 304          * geometry register consistantly.
 305          */
 306         if (aha->boardid <= 0x42) {
 307                 /* Wait 10ms before reading */
 308                 DELAY(10000);
 309                 status = aha_inb(aha, GEOMETRY_REG);
 310                 if (status != 0xff && status != 0x00 && status != 0x7f) {
 311                         PRVERB((aha->dev, "Geometry Register test failed %#x\n",
 312                                 status));
 313                         return (ENXIO);
 314                 }
 315         }
 316
 317         return (0);
 318 }
 319
 320 /*
 321  * Pull the boards setup information and record it in our softc.
 322  */
 323 int
 324 aha_fetch_adapter_info(struct aha_softc *aha)
 325 {
 326         setup_data_t    setup_info;
 327         config_data_t config_data;
 328         uint8_t length_param;
 329         int      error;
 330         struct  aha_extbios extbios;
 331
 332         switch (aha->boardid) {
 333         case BOARD_1540_16HEAD_BIOS:
 334                 snprintf(aha->model, sizeof(aha->model), "1540 16 head BIOS");
 335                 break;
 336         case BOARD_1540_64HEAD_BIOS:
 337                 snprintf(aha->model, sizeof(aha->model), "1540 64 head BIOS");
 338                 break;
 339         case BOARD_1542:
 340                 snprintf(aha->model, sizeof(aha->model), "1540/1542 64 head BIOS");
 341                 break;
 342         case BOARD_1640:
 343                 snprintf(aha->model, sizeof(aha->model), "1640");
 344                 break;
 345         case BOARD_1740:
 346                 snprintf(aha->model, sizeof(aha->model), "1740A/1742A/1744");
 347                 break;
 348         case BOARD_1542C:
 349                 snprintf(aha->model, sizeof(aha->model), "1542C");
 350                 break;
 351         case BOARD_1542CF:
 352                 snprintf(aha->model, sizeof(aha->model), "1542CF");
 353                 break;
 354         case BOARD_1542CP:
 355                 snprintf(aha->model, sizeof(aha->model), "1542CP");
 356                 break;
 357         default:
 358                 snprintf(aha->model, sizeof(aha->model), "Unknown");
 359                 break;
 360         }
 361         /*
 362          * If we are a new type of 1542 board (anything newer than a 1542C)
 363          * then disable the extended bios so that the
 364          * mailbox interface is unlocked.
 365          * This is also true for the 1542B Version 3.20. First Adaptec
 366          * board that supports >1Gb drives.
 367          * No need to check the extended bios flags as some of the
 368          * extensions that cause us problems are not flagged in that byte.
 369          */
 370         if (PROBABLY_NEW_BOARD(aha->boardid) ||
 371                 (aha->boardid == 0x41
 372                 && aha->fw_major == 0x31 &&
 373                 aha->fw_minor >= 0x34)) {
 374                 error = aha_cmd(aha, AOP_RETURN_EXT_BIOS_INFO, NULL,
 375                     /*paramlen*/0, (u_char *)&extbios, sizeof(extbios),
 376                     DEFAULT_CMD_TIMEOUT);
 377                 if (error != 0) {
 378                         device_printf(aha->dev,
 379                             "AOP_RETURN_EXT_BIOS_INFO - Failed.");
 380                         return (error);
 381                 }
 382                 error = aha_cmd(aha, AOP_MBOX_IF_ENABLE, (uint8_t *)&extbios,
 383                     /*paramlen*/2, NULL, 0, DEFAULT_CMD_TIMEOUT);
 384                 if (error != 0) {
 385                         device_printf(aha->dev, "AOP_MBOX_IF_ENABLE - Failed.");
 386                         return (error);
 387                 }
 388         }
 389         if (aha->boardid < 0x41)
 390                 device_printf(aha->dev, "Warning: aha-1542A won't work.\n");
 391
 392         aha->max_sg = 17;               /* Need >= 17 to do 64k I/O */
 393         aha->diff_bus = 0;
 394         aha->extended_lun = 0;
 395         aha->extended_trans = 0;
 396         aha->max_ccbs = 16;
 397         /* Determine Sync/Wide/Disc settings */
 398         length_param = sizeof(setup_info);
 399         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &length_param,
 400             /*paramlen*/1, (uint8_t*)&setup_info, sizeof(setup_info),
 401             DEFAULT_CMD_TIMEOUT);
 402         if (error != 0) {
 403                 device_printf(aha->dev, "aha_fetch_adapter_info - Failed "
 404                     "Get Setup Info\n");
 405                 return (error);
 406         }
 407         if (setup_info.initiate_sync != 0) {
 408                 aha->sync_permitted = ALL_TARGETS;
 409         }
 410         aha->disc_permitted = ALL_TARGETS;
 411
 412         /* We need as many mailboxes as we can have ccbs */
 413         aha->num_boxes = aha->max_ccbs;
 414
 415         /* Determine our SCSI ID */
 416         error = aha_cmd(aha, AOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
 417             (uint8_t*)&config_data, sizeof(config_data), DEFAULT_CMD_TIMEOUT);
 418         if (error != 0) {
 419                 device_printf(aha->dev,
 420                     "aha_fetch_adapter_info - Failed Get Config\n");
 421                 return (error);
 422         }
 423         aha->scsi_id = config_data.scsi_id;
 424         return (0);
 425 }
 426
 427 /*
 428  * Start the board, ready for normal operation
 429  */
 430 int
 431 aha_init(struct aha_softc* aha)
 432 {
 433         /* Announce the Adapter */
 434         device_printf(aha->dev, "AHA-%s FW Rev. %c.%c (ID=%x) ",
 435             aha->model, aha->fw_major, aha->fw_minor, aha->boardid);
 436
 437         if (aha->diff_bus != 0)
 438                 printf("Diff ");
 439
 440         printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", aha->scsi_id,
 441             aha->max_ccbs);
 442
 443         /*
 444          * Create our DMA tags.  These tags define the kinds of device
 445          * accessible memory allocations and memory mappings we will
 446          * need to perform during normal operation.
 447          *
 448          * Unless we need to further restrict the allocation, we rely
 449          * on the restrictions of the parent dmat, hence the common
 450          * use of MAXADDR and MAXSIZE.
 451          */
 452
 453         /* DMA tag for mapping buffers into device visible space. */
 454         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
 455                                 /* alignment    */ 1,
 456                                 /* boundary     */ 0,
 457                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
 458                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 459                                 /* filter       */ NULL,
 460                                 /* filterarg    */ NULL,
 461                                 /* maxsize      */ DFLTPHYS,
 462                                 /* nsegments    */ AHA_NSEG,
 463                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
 464                                 /* flags        */ BUS_DMA_ALLOCNOW,
 465                                 /* lockfunc     */ busdma_lock_mutex,
 466                                 /* lockarg      */ &aha->lock,
 467                                 &aha->buffer_dmat) != 0) {
 468                 goto error_exit;
 469         }
 470
 471         aha->init_level++;
 472         /* DMA tag for our mailboxes */
 473         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
 474                                 /* alignment    */ 1,
 475                                 /* boundary     */ 0,
 476                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
 477                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 478                                 /* filter       */ NULL,
 479                                 /* filterarg    */ NULL,
 480                                 /* maxsize      */ aha->num_boxes *
 481                                                    (sizeof(aha_mbox_in_t) +
 482                                                     sizeof(aha_mbox_out_t)),
 483                                 /* nsegments    */ 1,
 484                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
 485                                 /* flags        */ 0,
 486                                 /* lockfunc     */ NULL,
 487                                 /* lockarg      */ NULL,
 488                                 &aha->mailbox_dmat) != 0) {
 489                 goto error_exit;
 490         }
 491
 492         aha->init_level++;
 493
 494         /* Allocation for our mailboxes */
 495         if (bus_dmamem_alloc(aha->mailbox_dmat, (void **)&aha->out_boxes,
 496             BUS_DMA_NOWAIT, &aha->mailbox_dmamap) != 0)
 497                 goto error_exit;
 498
 499         aha->init_level++;
 500
 501         /* And permanently map them */
 502         bus_dmamap_load(aha->mailbox_dmat, aha->mailbox_dmamap,
 503             aha->out_boxes, aha->num_boxes * (sizeof(aha_mbox_in_t) +
 504             sizeof(aha_mbox_out_t)), ahamapmboxes, aha, /*flags*/0);
 505
 506         aha->init_level++;
 507
 508         aha->in_boxes = (aha_mbox_in_t *)&aha->out_boxes[aha->num_boxes];
 509
 510         ahainitmboxes(aha);
 511
 512         /* DMA tag for our ccb structures */
 513         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
 514                                 /* alignment    */ 1,
 515                                 /* boundary     */ 0,
 516                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
 517                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 518                                 /* filter       */ NULL,
 519                                 /* filterarg    */ NULL,
 520                                 /* maxsize      */ aha->max_ccbs *
 521                                                    sizeof(struct aha_ccb),
 522                                 /* nsegments    */ 1,
 523                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
 524                                 /* flags        */ 0,
 525                                 /* lockfunc     */ NULL,
 526                                 /* lockarg      */ NULL,
 527                                 &aha->ccb_dmat) != 0) {
 528                 goto error_exit;
 529         }
 530
 531         aha->init_level++;
 532
 533         /* Allocation for our ccbs */
 534         if (bus_dmamem_alloc(aha->ccb_dmat, (void **)&aha->aha_ccb_array,
 535             BUS_DMA_NOWAIT, &aha->ccb_dmamap) != 0)
 536                 goto error_exit;
 537
 538         aha->init_level++;
 539
 540         /* And permanently map them */
 541         bus_dmamap_load(aha->ccb_dmat, aha->ccb_dmamap, aha->aha_ccb_array,
 542             aha->max_ccbs * sizeof(struct aha_ccb), ahamapccbs, aha, /*flags*/0);
 543
 544         aha->init_level++;
 545
 546         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
 547         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
 548                                 /* alignment    */ 1,
 549                                 /* boundary     */ 0,
 550                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
 551                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 552                                 /* filter       */ NULL,
 553                                 /* filterarg    */ NULL,
 554                                 /* maxsize      */ PAGE_SIZE,
 555                                 /* nsegments    */ 1,
 556                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
 557                                 /* flags        */ 0,
 558                                 /* lockfunc     */ NULL,
 559                                 /* lockarg      */ NULL,
 560                                 &aha->sg_dmat) != 0)
 561                 goto error_exit;
 562
 563         aha->init_level++;
 564
 565         /* Perform initial CCB allocation */
 566         bzero(aha->aha_ccb_array, aha->max_ccbs * sizeof(struct aha_ccb));
 567         ahaallocccbs(aha);
 568
 569         if (aha->num_ccbs == 0) {
 570                 device_printf(aha->dev,
 571                     "aha_init - Unable to allocate initial ccbs\n");
 572                 goto error_exit;
 573         }
 574
 575         /*
 576          * Note that we are going and return (to probe)
 577          */
 578         return (0);
 579
 580 error_exit:
 581
 582         return (ENXIO);
 583 }
 584
 585 int
 586 aha_attach(struct aha_softc *aha)
 587 {
 588         int tagged_dev_openings;
 589         struct cam_devq *devq;
 590
 591         /*
 592          * We don't do tagged queueing, since the aha cards don't
 593          * support it.
 594          */
 595         tagged_dev_openings = 0;
 596
 597         /*
 598          * Create the device queue for our SIM.
 599          */
 600         devq = cam_simq_alloc(aha->max_ccbs - 1);
 601         if (devq == NULL)
 602                 return (ENOMEM);
 603
 604         /*
 605          * Construct our SIM entry
 606          */
 607         aha->sim = cam_sim_alloc(ahaaction, ahapoll, "aha", aha,
 608             device_get_unit(aha->dev), &aha->lock, 2, tagged_dev_openings,
 609             devq);
 610         if (aha->sim == NULL) {
 611                 cam_simq_free(devq);
 612                 return (ENOMEM);
 613         }
 614         mtx_lock(&aha->lock);
 615         if (xpt_bus_register(aha->sim, aha->dev, 0) != CAM_SUCCESS) {
 616                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
 617                 mtx_unlock(&aha->lock);
 618                 return (ENXIO);
 619         }
 620         if (xpt_create_path(&aha->path, /*periph*/NULL, cam_sim_path(aha->sim),
 621             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 622                 xpt_bus_deregister(cam_sim_path(aha->sim));
 623                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
 624                 mtx_unlock(&aha->lock);
 625                 return (ENXIO);
 626         }
 627         mtx_unlock(&aha->lock);
 628
 629         return (0);
 630 }
 631
 632 static void
 633 ahaallocccbs(struct aha_softc *aha)
 634 {
 635         struct aha_ccb *next_ccb;
 636         struct sg_map_node *sg_map;
 637         bus_addr_t physaddr;
 638         aha_sg_t *segs;
 639         int newcount;
 640         int i;
 641
 642         next_ccb = &aha->aha_ccb_array[aha->num_ccbs];
 643
 644         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
 645
 646         if (sg_map == NULL)
 647                 return;
 648
 649         /* Allocate S/G space for the next batch of CCBS */
 650         if (bus_dmamem_alloc(aha->sg_dmat, (void **)&sg_map->sg_vaddr,
 651             BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 652                 free(sg_map, M_DEVBUF);
 653                 return;
 654         }
 655
 656         SLIST_INSERT_HEAD(&aha->sg_maps, sg_map, links);
 657
 658         bus_dmamap_load(aha->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 659             PAGE_SIZE, ahamapsgs, aha, /*flags*/0);
 660
 661         segs = sg_map->sg_vaddr;
 662         physaddr = sg_map->sg_physaddr;
 663
 664         newcount = (PAGE_SIZE / (AHA_NSEG * sizeof(aha_sg_t)));
 665         for (i = 0; aha->num_ccbs < aha->max_ccbs && i < newcount; i++) {
 666                 int error;
 667
 668                 next_ccb->sg_list = segs;
 669                 next_ccb->sg_list_phys = physaddr;
 670                 next_ccb->flags = ACCB_FREE;
 671                 callout_init_mtx(&next_ccb->timer, &aha->lock, 0);
 672                 error = bus_dmamap_create(aha->buffer_dmat, /*flags*/0,
 673                     &next_ccb->dmamap);
 674                 if (error != 0)
 675                         break;
 676                 SLIST_INSERT_HEAD(&aha->free_aha_ccbs, next_ccb, links);
 677                 segs += AHA_NSEG;
 678                 physaddr += (AHA_NSEG * sizeof(aha_sg_t));
 679                 next_ccb++;
 680                 aha->num_ccbs++;
 681         }
 682
 683         /* Reserve a CCB for error recovery */
 684         if (aha->recovery_accb == NULL) {
 685                 aha->recovery_accb = SLIST_FIRST(&aha->free_aha_ccbs);
 686                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
 687         }
 688 }
 689
 690 static __inline void
 691 ahafreeccb(struct aha_softc *aha, struct aha_ccb *accb)
 692 {
 693
 694         if (!dumping)
 695                 mtx_assert(&aha->lock, MA_OWNED);
 696         if ((accb->flags & ACCB_ACTIVE) != 0)
 697                 LIST_REMOVE(&accb->ccb->ccb_h, sim_links.le);
 698         if (aha->resource_shortage != 0
 699             && (accb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
 700                 accb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 701                 aha->resource_shortage = FALSE;
 702         }
 703         accb->flags = ACCB_FREE;
 704         SLIST_INSERT_HEAD(&aha->free_aha_ccbs, accb, links);
 705         aha->active_ccbs--;
 706 }
 707
 708 static struct aha_ccb*
 709 ahagetccb(struct aha_softc *aha)
 710 {
 711         struct  aha_ccb* accb;
 712
 713         if (!dumping)
 714                 mtx_assert(&aha->lock, MA_OWNED);
 715         if ((accb = SLIST_FIRST(&aha->free_aha_ccbs)) != NULL) {
 716                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
 717                 aha->active_ccbs++;
 718         } else if (aha->num_ccbs < aha->max_ccbs) {
 719                 ahaallocccbs(aha);
 720                 accb = SLIST_FIRST(&aha->free_aha_ccbs);
 721                 if (accb == NULL)
 722                         device_printf(aha->dev, "Can't malloc ACCB\n");
 723                 else {
 724                         SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
 725                         aha->active_ccbs++;
 726                 }
 727         }
 728
 729         return (accb);
 730 }
 731
 732 static void
 733 ahaaction(struct cam_sim *sim, union ccb *ccb)
 734 {
 735         struct  aha_softc *aha;
 736
 737         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahaaction\n"));
 738
 739         aha = (struct aha_softc *)cam_sim_softc(sim);
 740         mtx_assert(&aha->lock, MA_OWNED);
 741
 742         switch (ccb->ccb_h.func_code) {
 743         /* Common cases first */
 744         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 745         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */        {
 746                 struct  aha_ccb *accb;
 747                 struct  aha_hccb *hccb;
 748
 749                 /*
 750                  * Get an accb to use.
 751                  */
 752                 if ((accb = ahagetccb(aha)) == NULL) {
 753                         aha->resource_shortage = TRUE;
 754                         xpt_freeze_simq(aha->sim, /*count*/1);
 755                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 756                         xpt_done(ccb);
 757                         return;
 758                 }
 759                 hccb = &accb->hccb;
 760
 761                 /*
 762                  * So we can find the ACCB when an abort is requested
 763                  */
 764                 accb->ccb = ccb;
 765                 ccb->ccb_h.ccb_accb_ptr = accb;
 766                 ccb->ccb_h.ccb_aha_ptr = aha;
 767
 768                 /*
 769                  * Put all the arguments for the xfer in the accb
 770                  */
 771                 hccb->target = ccb->ccb_h.target_id;
 772                 hccb->lun = ccb->ccb_h.target_lun;
 773                 hccb->ahastat = 0;
 774                 hccb->sdstat = 0;
 775
 776                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
 777                         struct ccb_scsiio *csio;
 778                         struct ccb_hdr *ccbh;
 779                         int error;
 780
 781                         csio = &ccb->csio;
 782                         ccbh = &csio->ccb_h;
 783                         hccb->opcode = aha->ccb_ccb_opcode;
 784                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) != 0;
 785                         hccb->dataout = (ccb->ccb_h.flags & CAM_DIR_OUT) != 0;
 786                         hccb->cmd_len = csio->cdb_len;
 787                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
 788                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 789                                 ahafreeccb(aha, accb);
 790                                 xpt_done(ccb);
 791                                 return;
 792                         }
 793                         hccb->sense_len = csio->sense_len;
 794                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
 795                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
 796                                         bcopy(csio->cdb_io.cdb_ptr,
 797                                               hccb->scsi_cdb, hccb->cmd_len);
 798                                 } else {
 799                                         /* I guess I could map it in... */
 800                                         ccbh->status = CAM_REQ_INVALID;
 801                                         ahafreeccb(aha, accb);
 802                                         xpt_done(ccb);
 803                                         return;
 804                                 }
 805                         } else {
 806                                 bcopy(csio->cdb_io.cdb_bytes,
 807                                       hccb->scsi_cdb, hccb->cmd_len);
 808                         }
 809                         /*
 810                          * If we have any data to send with this command,
 811                          * map it into bus space.
 812                          */
 813
 814                         error = bus_dmamap_load_ccb(
 815                             aha->buffer_dmat,
 816                             accb->dmamap,
 817                             ccb,
 818                             ahaexecuteccb,
 819                             accb,
 820                             /*flags*/0);
 821                         if (error == EINPROGRESS) {
 822                                 /*
 823                                  * So as to maintain ordering, freeze the
 824                                  * controller queue until our mapping is
 825                                  * returned.
 826                                  */
 827                                 xpt_freeze_simq(aha->sim, 1);
 828                                 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
 829                         }
 830                 } else {
 831                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
 832                         /* No data transfer */
 833                         hccb->datain = TRUE;
 834                         hccb->dataout = TRUE;
 835                         hccb->cmd_len = 0;
 836                         hccb->sense_len = 0;
 837                         ahaexecuteccb(accb, NULL, 0, 0);
 838                 }
 839                 break;
 840         }
 841         case XPT_EN_LUN:                /* Enable LUN as a target */
 842         case XPT_TARGET_IO:             /* Execute target I/O request */
 843         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
 844         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
 845         case XPT_ABORT:                 /* Abort the specified CCB */
 846                 /* XXX Implement */
 847                 ccb->ccb_h.status = CAM_REQ_INVALID;
 848                 xpt_done(ccb);
 849                 break;
 850         case XPT_SET_TRAN_SETTINGS:
 851                 /* XXX Implement */
 852                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 853                 xpt_done(ccb);
 854                 break;
 855         case XPT_GET_TRAN_SETTINGS:
 856         /* Get default/user set transfer settings for the target */
 857         {
 858                 struct  ccb_trans_settings *cts = &ccb->cts;
 859                 u_int   target_mask = 0x01 << ccb->ccb_h.target_id;
 860                 struct ccb_trans_settings_scsi *scsi =
 861                     &cts->proto_specific.scsi;
 862                 struct ccb_trans_settings_spi *spi =
 863                     &cts->xport_specific.spi;
 864
 865                 cts->protocol = PROTO_SCSI;
 866                 cts->protocol_version = SCSI_REV_2;
 867                 cts->transport = XPORT_SPI;
 868                 cts->transport_version = 2;
 869                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 870                         spi->flags = 0;
 871                         if ((aha->disc_permitted & target_mask) != 0)
 872                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
 873                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 874                         if ((aha->sync_permitted & target_mask) != 0) {
 875                                 if (aha->boardid >= BOARD_1542CF)
 876                                         spi->sync_period = 25;
 877                                 else
 878                                         spi->sync_period = 50;
 879                         } else {
 880                                 spi->sync_period = 0;
 881                         }
 882
 883                         if (spi->sync_period != 0)
 884                                 spi->sync_offset = 15;
 885
 886                         spi->valid = CTS_SPI_VALID_SYNC_RATE
 887                                    | CTS_SPI_VALID_SYNC_OFFSET
 888                                    | CTS_SPI_VALID_BUS_WIDTH
 889                                    | CTS_SPI_VALID_DISC;
 890                         scsi->valid = CTS_SCSI_VALID_TQ;
 891                 } else {
 892                         ahafetchtransinfo(aha, cts);
 893                 }
 894
 895                 ccb->ccb_h.status = CAM_REQ_CMP;
 896                 xpt_done(ccb);
 897                 break;
 898         }
 899         case XPT_CALC_GEOMETRY:
 900         {
 901                 struct    ccb_calc_geometry *ccg;
 902                 uint32_t size_mb;
 903                 uint32_t secs_per_cylinder;
 904
 905                 ccg = &ccb->ccg;
 906                 size_mb = ccg->volume_size
 907                         / ((1024L * 1024L) / ccg->block_size);
 908                 if (size_mb >= 1024 && (aha->extended_trans != 0)) {
 909                         if (size_mb >= 2048) {
 910                                 ccg->heads = 255;
 911                                 ccg->secs_per_track = 63;
 912                         } else {
 913                                 ccg->heads = 128;
 914                                 ccg->secs_per_track = 32;
 915                         }
 916                 } else {
 917                         ccg->heads = 64;
 918                         ccg->secs_per_track = 32;
 919                 }
 920                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 921                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 922                 ccb->ccb_h.status = CAM_REQ_CMP;
 923                 xpt_done(ccb);
 924                 break;
 925         }
 926         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
 927                 ahareset(aha, /*hardreset*/TRUE);
 928                 ccb->ccb_h.status = CAM_REQ_CMP;
 929                 xpt_done(ccb);
 930                 break;
 931         case XPT_TERM_IO:               /* Terminate the I/O process */
 932                 /* XXX Implement */
 933                 ccb->ccb_h.status = CAM_REQ_INVALID;
 934                 xpt_done(ccb);
 935                 break;
 936         case XPT_PATH_INQ:              /* Path routing inquiry */
 937         {
 938                 struct ccb_pathinq *cpi = &ccb->cpi;
 939
 940                 cpi->version_num = 1; /* XXX??? */
 941                 cpi->hba_inquiry = PI_SDTR_ABLE;
 942                 cpi->target_sprt = 0;
 943                 cpi->hba_misc = 0;
 944                 cpi->hba_eng_cnt = 0;
 945                 cpi->max_target = 7;
 946                 cpi->max_lun = 7;
 947                 cpi->initiator_id = aha->scsi_id;
 948                 cpi->bus_id = cam_sim_bus(sim);
 949                 cpi->base_transfer_speed = 3300;
 950                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 951                 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
 952                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 953                 cpi->unit_number = cam_sim_unit(sim);
 954                 cpi->transport = XPORT_SPI;
 955                 cpi->transport_version = 2;
 956                 cpi->protocol = PROTO_SCSI;
 957                 cpi->protocol_version = SCSI_REV_2;
 958                 cpi->ccb_h.status = CAM_REQ_CMP;
 959                 xpt_done(ccb);
 960                 break;
 961         }
 962         default:
 963                 ccb->ccb_h.status = CAM_REQ_INVALID;
 964                 xpt_done(ccb);
 965                 break;
 966         }
 967 }
 968
 969 static void
 970 ahaexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 971 {
 972         struct   aha_ccb *accb;
 973         union    ccb *ccb;
 974         struct   aha_softc *aha;
 975         uint32_t paddr;
 976
 977         accb = (struct aha_ccb *)arg;
 978         ccb = accb->ccb;
 979         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
 980
 981         if (error != 0) {
 982                 if (error != EFBIG)
 983                         device_printf(aha->dev,
 984                             "Unexepected error 0x%x returned from "
 985                             "bus_dmamap_load\n", error);
 986                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 987                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 988                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 989                 }
 990                 ahafreeccb(aha, accb);
 991                 xpt_done(ccb);
 992                 return;
 993         }
 994
 995         if (nseg != 0) {
 996                 aha_sg_t *sg;
 997                 bus_dma_segment_t *end_seg;
 998                 bus_dmasync_op_t op;
 999
1000                 end_seg = dm_segs + nseg;
1001
1002                 /* Copy the segments into our SG list */
1003                 sg = accb->sg_list;
1004                 while (dm_segs < end_seg) {
1005                         ahautoa24(dm_segs->ds_len, sg->len);
1006                         ahautoa24(dm_segs->ds_addr, sg->addr);
1007                         sg++;
1008                         dm_segs++;
1009                 }
1010
1011                 if (nseg > 1) {
1012                         accb->hccb.opcode = aha->ccb_sg_opcode;
1013                         ahautoa24((sizeof(aha_sg_t) * nseg),
1014                             accb->hccb.data_len);
1015                         ahautoa24(accb->sg_list_phys, accb->hccb.data_addr);
1016                 } else {
1017                         bcopy(accb->sg_list->len, accb->hccb.data_len, 3);
1018                         bcopy(accb->sg_list->addr, accb->hccb.data_addr, 3);
1019                 }
1020
1021                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1022                         op = BUS_DMASYNC_PREREAD;
1023                 else
1024                         op = BUS_DMASYNC_PREWRITE;
1025
1026                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
1027
1028         } else {
1029                 accb->hccb.opcode = INITIATOR_CCB;
1030                 ahautoa24(0, accb->hccb.data_len);
1031                 ahautoa24(0, accb->hccb.data_addr);
1032         }
1033
1034         /*
1035          * Last time we need to check if this CCB needs to
1036          * be aborted.
1037          */
1038         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
1039                 if (nseg != 0)
1040                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
1041                 ahafreeccb(aha, accb);
1042                 xpt_done(ccb);
1043                 return;
1044         }
1045
1046         accb->flags = ACCB_ACTIVE;
1047         ccb->ccb_h.status |= CAM_SIM_QUEUED;
1048         LIST_INSERT_HEAD(&aha->pending_ccbs, &ccb->ccb_h, sim_links.le);
1049
1050         callout_reset_sbt(&accb->timer, SBT_1MS * ccb->ccb_h.timeout, 0,
1051             ahatimeout, accb, 0);
1052
1053         /* Tell the adapter about this command */
1054         if (aha->cur_outbox->action_code != AMBO_FREE) {
1055                 /*
1056                  * We should never encounter a busy mailbox.
1057                  * If we do, warn the user, and treat it as
1058                  * a resource shortage.  If the controller is
1059                  * hung, one of the pending transactions will
1060                  * timeout causing us to start recovery operations.
1061                  */
1062                 device_printf(aha->dev,
1063                     "Encountered busy mailbox with %d out of %d "
1064                     "commands active!!!", aha->active_ccbs, aha->max_ccbs);
1065                 callout_stop(&accb->timer);
1066                 if (nseg != 0)
1067                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
1068                 ahafreeccb(aha, accb);
1069                 aha->resource_shortage = TRUE;
1070                 xpt_freeze_simq(aha->sim, /*count*/1);
1071                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
1072                 xpt_done(ccb);
1073                 return;
1074         }
1075         paddr = ahaccbvtop(aha, accb);
1076         ahautoa24(paddr, aha->cur_outbox->ccb_addr);
1077         aha->cur_outbox->action_code = AMBO_START;
1078         aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
1079
1080         ahanextoutbox(aha);
1081 }
1082
1083 void
1084 aha_intr(void *arg)
1085 {
1086         struct  aha_softc *aha;
1087
1088         aha = arg;
1089         mtx_lock(&aha->lock);
1090         aha_intr_locked(aha);
1091         mtx_unlock(&aha->lock);
1092 }
1093
1094 void
1095 aha_intr_locked(struct aha_softc *aha)
1096 {
1097         u_int   intstat;
1098         uint32_t paddr;
1099
1100         while (((intstat = aha_inb(aha, INTSTAT_REG)) & INTR_PENDING) != 0) {
1101                 if ((intstat & CMD_COMPLETE) != 0) {
1102                         aha->latched_status = aha_inb(aha, STATUS_REG);
1103                         aha->command_cmp = TRUE;
1104                 }
1105
1106                 aha_outb(aha, CONTROL_REG, RESET_INTR);
1107
1108                 if ((intstat & IMB_LOADED) != 0) {
1109                         while (aha->cur_inbox->comp_code != AMBI_FREE) {
1110                                 paddr = aha_a24tou(aha->cur_inbox->ccb_addr);
1111                                 ahadone(aha, ahaccbptov(aha, paddr),
1112                                     aha->cur_inbox->comp_code);
1113                                 aha->cur_inbox->comp_code = AMBI_FREE;
1114                                 ahanextinbox(aha);
1115                         }
1116                 }
1117
1118                 if ((intstat & SCSI_BUS_RESET) != 0) {
1119                         ahareset(aha, /*hardreset*/FALSE);
1120                 }
1121         }
1122 }
1123
1124 static void
1125 ahadone(struct aha_softc *aha, struct aha_ccb *accb, aha_mbi_comp_code_t comp_code)
1126 {
1127         union  ccb        *ccb;
1128         struct ccb_scsiio *csio;
1129
1130         ccb = accb->ccb;
1131         csio = &accb->ccb->csio;
1132
1133         if ((accb->flags & ACCB_ACTIVE) == 0) {
1134                 device_printf(aha->dev,
1135                     "ahadone - Attempt to free non-active ACCB %p\n",
1136                     (void *)accb);
1137                 return;
1138         }
1139
1140         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1141                 bus_dmasync_op_t op;
1142
1143                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1144                         op = BUS_DMASYNC_POSTREAD;
1145                 else
1146                         op = BUS_DMASYNC_POSTWRITE;
1147                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
1148                 bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
1149         }
1150
1151         if (accb == aha->recovery_accb) {
1152                 /*
1153                  * The recovery ACCB does not have a CCB associated
1154                  * with it, so short circuit the normal error handling.
1155                  * We now traverse our list of pending CCBs and process
1156                  * any that were terminated by the recovery CCBs action.
1157                  * We also reinstate timeouts for all remaining, pending,
1158                  * CCBs.
1159                  */
1160                 struct cam_path *path;
1161                 struct ccb_hdr *ccb_h;
1162                 cam_status error;
1163
1164                 /* Notify all clients that a BDR occured */
1165                 error = xpt_create_path(&path, /*periph*/NULL,
1166                     cam_sim_path(aha->sim), accb->hccb.target,
1167                     CAM_LUN_WILDCARD);
1168
1169                 if (error == CAM_REQ_CMP) {
1170                         xpt_async(AC_SENT_BDR, path, NULL);
1171                         xpt_free_path(path);
1172                 }
1173
1174                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
1175                 while (ccb_h != NULL) {
1176                         struct aha_ccb *pending_accb;
1177
1178                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
1179                         if (pending_accb->hccb.target == accb->hccb.target) {
1180                                 pending_accb->hccb.ahastat = AHASTAT_HA_BDR;
1181                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1182                                 ahadone(aha, pending_accb, AMBI_ERROR);
1183                         } else {
1184                                 callout_reset_sbt(&pending_accb->timer,
1185                                     SBT_1MS * ccb_h->timeout, 0, ahatimeout,
1186                                     pending_accb, 0);
1187                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1188                         }
1189                 }
1190                 device_printf(aha->dev, "No longer in timeout\n");
1191                 return;
1192         }
1193
1194         callout_stop(&accb->timer);
1195
1196         switch (comp_code) {
1197         case AMBI_FREE:
1198                 device_printf(aha->dev,
1199                     "ahadone - CCB completed with free status!\n");
1200                 break;
1201         case AMBI_NOT_FOUND:
1202                 device_printf(aha->dev,
1203                     "ahadone - CCB Abort failed to find CCB\n");
1204                 break;
1205         case AMBI_ABORT:
1206         case AMBI_ERROR:
1207                 /* An error occured */
1208                 if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
1209                         csio->resid = 0;
1210                 else
1211                         csio->resid = aha_a24tou(accb->hccb.data_len);
1212                 switch(accb->hccb.ahastat) {
1213                 case AHASTAT_DATARUN_ERROR:
1214                 {
1215                         if (csio->resid <= 0) {
1216                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
1217                                 break;
1218                         }
1219                         /* FALLTHROUGH */
1220                 }
1221                 case AHASTAT_NOERROR:
1222                         csio->scsi_status = accb->hccb.sdstat;
1223                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1224                         switch(csio->scsi_status) {
1225                         case SCSI_STATUS_CHECK_COND:
1226                         case SCSI_STATUS_CMD_TERMINATED:
1227                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
1228                                 /*
1229                                  * The aha writes the sense data at different
1230                                  * offsets based on the scsi cmd len
1231                                  */
1232                                 bcopy((caddr_t) &accb->hccb.scsi_cdb +
1233                                     accb->hccb.cmd_len,
1234                                     (caddr_t) &csio->sense_data,
1235                                     accb->hccb.sense_len);
1236                                 break;
1237                         default:
1238                                 break;
1239                         case SCSI_STATUS_OK:
1240                                 csio->ccb_h.status = CAM_REQ_CMP;
1241                                 break;
1242                         }
1243                         break;
1244                 case AHASTAT_SELTIMEOUT:
1245                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
1246                         break;
1247                 case AHASTAT_UNEXPECTED_BUSFREE:
1248                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
1249                         break;
1250                 case AHASTAT_INVALID_PHASE:
1251                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
1252                         break;
1253                 case AHASTAT_INVALID_ACTION_CODE:
1254                         panic("%s: Inavlid Action code", aha_name(aha));
1255                         break;
1256                 case AHASTAT_INVALID_OPCODE:
1257                         if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
1258                                 panic("%s: Invalid CCB Opcode %x hccb = %p",
1259                                     aha_name(aha), accb->hccb.opcode,
1260                                     &accb->hccb);
1261                         device_printf(aha->dev,
1262                             "AHA-1540A compensation failed\n");
1263                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
1264                         csio->ccb_h.status = CAM_REQUEUE_REQ;
1265                         break;
1266                 case AHASTAT_LINKED_CCB_LUN_MISMATCH:
1267                         /* We don't even support linked commands... */
1268                         panic("%s: Linked CCB Lun Mismatch", aha_name(aha));
1269                         break;
1270                 case AHASTAT_INVALID_CCB_OR_SG_PARAM:
1271                         panic("%s: Invalid CCB or SG list", aha_name(aha));
1272                         break;
1273                 case AHASTAT_HA_SCSI_BUS_RESET:
1274                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
1275                             != CAM_CMD_TIMEOUT)
1276                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
1277                         break;
1278                 case AHASTAT_HA_BDR:
1279                         if ((accb->flags & ACCB_DEVICE_RESET) == 0)
1280                                 csio->ccb_h.status = CAM_BDR_SENT;
1281                         else
1282                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
1283                         break;
1284                 }
1285                 if (csio->ccb_h.status != CAM_REQ_CMP) {
1286                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
1287                         csio->ccb_h.status |= CAM_DEV_QFRZN;
1288                 }
1289                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
1290                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1291                 ahafreeccb(aha, accb);
1292                 xpt_done(ccb);
1293                 break;
1294         case AMBI_OK:
1295                 /* All completed without incident */
1296                 /* XXX DO WE NEED TO COPY SENSE BYTES HERE???? XXX */
1297                 /* I don't think so since it works???? */
1298                 ccb->ccb_h.status |= CAM_REQ_CMP;
1299                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
1300                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1301                 ahafreeccb(aha, accb);
1302                 xpt_done(ccb);
1303                 break;
1304         }
1305 }
1306
1307 static int
1308 ahareset(struct aha_softc* aha, int hard_reset)
1309 {
1310         struct   ccb_hdr *ccb_h;
1311         u_int    status;
1312         u_int    timeout;
1313         uint8_t reset_type;
1314
1315         if (hard_reset != 0)
1316                 reset_type = HARD_RESET;
1317         else
1318                 reset_type = SOFT_RESET;
1319         aha_outb(aha, CONTROL_REG, reset_type);
1320
1321         /* Wait 5sec. for Diagnostic start */
1322         timeout = 5 * 10000;
1323         while (--timeout) {
1324                 status = aha_inb(aha, STATUS_REG);
1325                 if ((status & DIAG_ACTIVE) != 0)
1326                         break;
1327                 DELAY(100);
1328         }
1329         if (timeout == 0) {
1330                 PRVERB((aha->dev, "ahareset - Diagnostic Active failed to "
1331                     "assert. status = %#x\n", status));
1332                 return (ETIMEDOUT);
1333         }
1334
1335         /* Wait 10sec. for Diagnostic end */
1336         timeout = 10 * 10000;
1337         while (--timeout) {
1338                 status = aha_inb(aha, STATUS_REG);
1339                 if ((status & DIAG_ACTIVE) == 0)
1340                         break;
1341                 DELAY(100);
1342         }
1343         if (timeout == 0) {
1344                 panic("%s: ahareset - Diagnostic Active failed to drop. "
1345                     "status = 0x%x\n", aha_name(aha), status);
1346                 return (ETIMEDOUT);
1347         }
1348
1349         /* Wait for the host adapter to become ready or report a failure */
1350         timeout = 10000;
1351         while (--timeout) {
1352                 status = aha_inb(aha, STATUS_REG);
1353                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
1354                         break;
1355                 DELAY(100);
1356         }
1357         if (timeout == 0) {
1358                 device_printf(aha->dev, "ahareset - Host adapter failed to "
1359                     "come ready. status = 0x%x\n", status);
1360                 return (ETIMEDOUT);
1361         }
1362
1363         /* If the diagnostics failed, tell the user */
1364         if ((status & DIAG_FAIL) != 0
1365          || (status & HA_READY) == 0) {
1366                 device_printf(aha->dev, "ahareset - Adapter failed diag\n");
1367
1368                 if ((status & DATAIN_REG_READY) != 0)
1369                         device_printf(aha->dev, "ahareset - Host Adapter "
1370                             "Error code = 0x%x\n", aha_inb(aha, DATAIN_REG));
1371                 return (ENXIO);
1372         }
1373
1374         /* If we've attached to the XPT, tell it about the event */
1375         if (aha->path != NULL)
1376                 xpt_async(AC_BUS_RESET, aha->path, NULL);
1377
1378         /*
1379          * Perform completion processing for all outstanding CCBs.
1380          */
1381         while ((ccb_h = LIST_FIRST(&aha->pending_ccbs)) != NULL) {
1382                 struct aha_ccb *pending_accb;
1383
1384                 pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
1385                 pending_accb->hccb.ahastat = AHASTAT_HA_SCSI_BUS_RESET;
1386                 ahadone(aha, pending_accb, AMBI_ERROR);
1387         }
1388
1389         /* If we've allocated mailboxes, initialize them */
1390         /* Must be done after we've aborted our queue, or aha_cmd fails */
1391         if (aha->init_level > 4)
1392                 ahainitmboxes(aha);
1393
1394         return (0);
1395 }
1396
1397 /*
1398  * Send a command to the adapter.
1399  */
1400 int
1401 aha_cmd(struct aha_softc *aha, aha_op_t opcode, uint8_t *params,
1402         u_int param_len, uint8_t *reply_data, u_int reply_len,
1403         u_int cmd_timeout)
1404 {
1405         u_int   timeout;
1406         u_int   status;
1407         u_int   saved_status;
1408         u_int   intstat;
1409         u_int   reply_buf_size;
1410         int     cmd_complete;
1411         int     error;
1412
1413         /* No data returned to start */
1414         reply_buf_size = reply_len;
1415         reply_len = 0;
1416         intstat = 0;
1417         cmd_complete = 0;
1418         saved_status = 0;
1419         error = 0;
1420
1421         /*
1422          * All commands except for the "start mailbox" and the "enable
1423          * outgoing mailbox read interrupt" commands cannot be issued
1424          * while there are pending transactions.  Freeze our SIMQ
1425          * and wait for all completions to occur if necessary.
1426          */
1427         timeout = 10000;
1428         while (LIST_FIRST(&aha->pending_ccbs) != NULL && --timeout) {
1429                 /* Fire the interrupt handler in case interrupts are blocked */
1430                 aha_intr(aha);
1431                 DELAY(10);
1432         }
1433
1434         if (timeout == 0) {
1435                 device_printf(aha->dev,
1436                     "aha_cmd: Timeout waiting for adapter idle\n");
1437                 return (ETIMEDOUT);
1438         }
1439         aha->command_cmp = 0;
1440         /*
1441          * Wait up to 10 sec. for the adapter to become
1442          * ready to accept commands.
1443          */
1444         timeout = 100000;
1445         while (--timeout) {
1446                 status = aha_inb(aha, STATUS_REG);
1447                 if ((status & HA_READY) != 0 && (status & CMD_REG_BUSY) == 0)
1448                         break;
1449                 /*
1450                  * Throw away any pending data which may be
1451                  * left over from earlier commands that we
1452                  * timedout on.
1453                  */
1454                 if ((status & DATAIN_REG_READY) != 0)
1455                         (void)aha_inb(aha, DATAIN_REG);
1456                 DELAY(100);
1457         }
1458         if (timeout == 0) {
1459                 device_printf(aha->dev, "aha_cmd: Timeout waiting for adapter"
1460                     " ready, status = 0x%x\n", status);
1461                 return (ETIMEDOUT);
1462         }
1463
1464         /*
1465          * Send the opcode followed by any necessary parameter bytes.
1466          */
1467         aha_outb(aha, COMMAND_REG, opcode);
1468
1469         /*
1470          * Wait for up to 1sec to get the parameter list sent
1471          */
1472         timeout = 10000;
1473         while (param_len && --timeout) {
1474                 DELAY(100);
1475                 status = aha_inb(aha, STATUS_REG);
1476                 intstat = aha_inb(aha, INTSTAT_REG);
1477
1478                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
1479                  == (INTR_PENDING|CMD_COMPLETE)) {
1480                         saved_status = status;
1481                         cmd_complete = 1;
1482                         break;
1483                 }
1484
1485                 if (aha->command_cmp != 0) {
1486                         saved_status = aha->latched_status;
1487                         cmd_complete = 1;
1488                         break;
1489                 }
1490                 if ((status & DATAIN_REG_READY) != 0)
1491                         break;
1492                 if ((status & CMD_REG_BUSY) == 0) {
1493                         aha_outb(aha, COMMAND_REG, *params++);
1494                         param_len--;
1495                         timeout = 10000;
1496                 }
1497         }
1498         if (timeout == 0) {
1499                 device_printf(aha->dev, "aha_cmd: Timeout sending parameters, "
1500                     "status = 0x%x\n", status);
1501                 error = ETIMEDOUT;
1502         }
1503
1504         /*
1505          * For all other commands, we wait for any output data
1506          * and the final comand completion interrupt.
1507          */
1508         while (cmd_complete == 0 && --cmd_timeout) {
1509
1510                 status = aha_inb(aha, STATUS_REG);
1511                 intstat = aha_inb(aha, INTSTAT_REG);
1512
1513                 if (aha->command_cmp != 0) {
1514                         cmd_complete = 1;
1515                         saved_status = aha->latched_status;
1516                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
1517                         == (INTR_PENDING|CMD_COMPLETE)) {
1518                         /*
1519                          * Our poll (in case interrupts are blocked)
1520                          * saw the CMD_COMPLETE interrupt.
1521                          */
1522                         cmd_complete = 1;
1523                         saved_status = status;
1524                 }
1525                 if ((status & DATAIN_REG_READY) != 0) {
1526                         uint8_t data;
1527
1528                         data = aha_inb(aha, DATAIN_REG);
1529                         if (reply_len < reply_buf_size) {
1530                                 *reply_data++ = data;
1531                         } else {
1532                                 device_printf(aha->dev,
1533                                     "aha_cmd - Discarded reply data "
1534                                     "byte for opcode 0x%x\n", opcode);
1535                         }
1536                         /*
1537                          * Reset timeout to ensure at least a second
1538                          * between response bytes.
1539                          */
1540                         cmd_timeout = MAX(cmd_timeout, 10000);
1541                         reply_len++;
1542                 }
1543                 DELAY(100);
1544         }
1545         if (cmd_timeout == 0) {
1546                 device_printf(aha->dev, "aha_cmd: Timeout: status = 0x%x, "
1547                     "intstat = 0x%x, reply_len = %d\n", status, intstat,
1548                     reply_len);
1549                 return (ETIMEDOUT);
1550         }
1551
1552         /*
1553          * Clear any pending interrupts.  Block interrupts so our
1554          * interrupt handler is not re-entered.
1555          */
1556         aha_intr(aha);
1557
1558         if (error != 0)
1559                 return (error);
1560
1561         /*
1562          * If the command was rejected by the controller, tell the caller.
1563          */
1564         if ((saved_status & CMD_INVALID) != 0) {
1565                 PRVERB((aha->dev, "Invalid Command 0x%x\n", opcode));
1566                 /*
1567                  * Some early adapters may not recover properly from
1568                  * an invalid command.  If it appears that the controller
1569                  * has wedged (i.e. status was not cleared by our interrupt
1570                  * reset above), perform a soft reset.
1571                  */
1572                 DELAY(1000);
1573                 status = aha_inb(aha, STATUS_REG);
1574                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
1575                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
1576                  || (status & (HA_READY|INIT_REQUIRED))
1577                   != (HA_READY|INIT_REQUIRED))
1578                         ahareset(aha, /*hard_reset*/FALSE);
1579                 return (EINVAL);
1580         }
1581
1582         if (param_len > 0) {
1583                 /* The controller did not accept the full argument list */
1584                 PRVERB((aha->dev, "Controller did not accept full argument "
1585                     "list (%d > 0)\n", param_len));
1586                 return (E2BIG);
1587         }
1588
1589         if (reply_len != reply_buf_size) {
1590                 /* Too much or too little data received */
1591                 PRVERB((aha->dev, "data received mismatch (%d != %d)\n",
1592                     reply_len, reply_buf_size));
1593                 return (EMSGSIZE);
1594         }
1595
1596         /* We were successful */
1597         return (0);
1598 }
1599
1600 static int
1601 ahainitmboxes(struct aha_softc *aha)
1602 {
1603         int error;
1604         init_24b_mbox_params_t init_mbox;
1605
1606         bzero(aha->in_boxes, sizeof(aha_mbox_in_t) * aha->num_boxes);
1607         bzero(aha->out_boxes, sizeof(aha_mbox_out_t) * aha->num_boxes);
1608         aha->cur_inbox = aha->in_boxes;
1609         aha->last_inbox = aha->in_boxes + aha->num_boxes - 1;
1610         aha->cur_outbox = aha->out_boxes;
1611         aha->last_outbox = aha->out_boxes + aha->num_boxes - 1;
1612
1613         /* Tell the adapter about them */
1614         init_mbox.num_mboxes = aha->num_boxes;
1615         ahautoa24(aha->mailbox_physbase, init_mbox.base_addr);
1616         error = aha_cmd(aha, AOP_INITIALIZE_MBOX, (uint8_t *)&init_mbox,
1617             /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
1618             /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
1619
1620         if (error != 0)
1621                 printf("ahainitmboxes: Initialization command failed\n");
1622         return (error);
1623 }
1624
1625 /*
1626  * Update the XPT's idea of the negotiated transfer
1627  * parameters for a particular target.
1628  */
1629 static void
1630 ahafetchtransinfo(struct aha_softc *aha, struct ccb_trans_settings* cts)
1631 {
1632         setup_data_t    setup_info;
1633         u_int           target;
1634         u_int           targ_offset;
1635         u_int           sync_period;
1636         int             error;
1637         uint8_t param;
1638         targ_syncinfo_t sync_info;
1639         struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
1640
1641         target = cts->ccb_h.target_id;
1642         targ_offset = (target & 0x7);
1643
1644         /*
1645          * Inquire Setup Information.  This command retreives
1646          * the sync info for older models.
1647          */
1648         param = sizeof(setup_info);
1649         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
1650             (uint8_t*)&setup_info, sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
1651
1652         if (error != 0) {
1653                 device_printf(aha->dev,
1654                     "ahafetchtransinfo - Inquire Setup Info Failed %d\n",
1655                     error);
1656                 return;
1657         }
1658
1659         sync_info = setup_info.syncinfo[targ_offset];
1660
1661         if (sync_info.sync == 0)
1662                 spi->sync_offset = 0;
1663         else
1664                 spi->sync_offset = sync_info.offset;
1665
1666         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1667
1668         if (aha->boardid >= BOARD_1542CF)
1669                 sync_period = 1000;
1670         else
1671                 sync_period = 2000;
1672         sync_period += 500 * sync_info.period;
1673
1674         /* Convert ns value to standard SCSI sync rate */
1675         if (spi->sync_offset != 0)
1676                 spi->sync_period = scsi_calc_syncparam(sync_period);
1677         else
1678                 spi->sync_period = 0;
1679
1680         spi->valid = CTS_SPI_VALID_SYNC_RATE
1681                    | CTS_SPI_VALID_SYNC_OFFSET
1682                    | CTS_SPI_VALID_BUS_WIDTH;
1683         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
1684 }
1685
1686 static void
1687 ahamapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1688 {
1689         struct aha_softc* aha;
1690
1691         aha = (struct aha_softc*)arg;
1692         aha->mailbox_physbase = segs->ds_addr;
1693 }
1694
1695 static void
1696 ahamapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1697 {
1698         struct aha_softc* aha;
1699
1700         aha = (struct aha_softc*)arg;
1701         aha->aha_ccb_physbase = segs->ds_addr;
1702 }
1703
1704 static void
1705 ahamapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1706 {
1707
1708         struct aha_softc* aha;
1709
1710         aha = (struct aha_softc*)arg;
1711         SLIST_FIRST(&aha->sg_maps)->sg_physaddr = segs->ds_addr;
1712 }
1713
1714 static void
1715 ahapoll(struct cam_sim *sim)
1716 {
1717         aha_intr_locked(cam_sim_softc(sim));
1718 }
1719
1720 static void
1721 ahatimeout(void *arg)
1722 {
1723         struct aha_ccb  *accb;
1724         union  ccb      *ccb;
1725         struct aha_softc *aha;
1726         uint32_t        paddr;
1727         struct ccb_hdr *ccb_h;
1728
1729         accb = (struct aha_ccb *)arg;
1730         ccb = accb->ccb;
1731         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
1732         mtx_assert(&aha->lock, MA_OWNED);
1733         xpt_print_path(ccb->ccb_h.path);
1734         printf("CCB %p - timed out\n", (void *)accb);
1735
1736         if ((accb->flags & ACCB_ACTIVE) == 0) {
1737                 xpt_print_path(ccb->ccb_h.path);
1738                 printf("CCB %p - timed out CCB already completed\n",
1739                     (void *)accb);
1740                 return;
1741         }
1742
1743         /*
1744          * In order to simplify the recovery process, we ask the XPT
1745          * layer to halt the queue of new transactions and we traverse
1746          * the list of pending CCBs and remove their timeouts. This
1747          * means that the driver attempts to clear only one error
1748          * condition at a time.  In general, timeouts that occur
1749          * close together are related anyway, so there is no benefit
1750          * in attempting to handle errors in parrallel.  Timeouts will
1751          * be reinstated when the recovery process ends.
1752          */
1753         if ((accb->flags & ACCB_DEVICE_RESET) == 0) {
1754                 if ((accb->flags & ACCB_RELEASE_SIMQ) == 0) {
1755                         xpt_freeze_simq(aha->sim, /*count*/1);
1756                         accb->flags |= ACCB_RELEASE_SIMQ;
1757                 }
1758
1759                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
1760                 while (ccb_h != NULL) {
1761                         struct aha_ccb *pending_accb;
1762
1763                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
1764                         callout_stop(&pending_accb->timer);
1765                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1766                 }
1767         }
1768
1769         if ((accb->flags & ACCB_DEVICE_RESET) != 0
1770          || aha->cur_outbox->action_code != AMBO_FREE) {
1771                 /*
1772                  * Try a full host adapter/SCSI bus reset.
1773                  * We do this only if we have already attempted
1774                  * to clear the condition with a BDR, or we cannot
1775                  * attempt a BDR for lack of mailbox resources.
1776                  */
1777                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1778                 ahareset(aha, /*hardreset*/TRUE);
1779                 device_printf(aha->dev, "No longer in timeout\n");
1780         } else {
1781                 /*
1782                  * Send a Bus Device Reset message:
1783                  * The target that is holding up the bus may not
1784                  * be the same as the one that triggered this timeout
1785                  * (different commands have different timeout lengths),
1786                  * but we have no way of determining this from our
1787                  * timeout handler.  Our strategy here is to queue a
1788                  * BDR message to the target of the timed out command.
1789                  * If this fails, we'll get another timeout 2 seconds
1790                  * later which will attempt a bus reset.
1791                  */
1792                 accb->flags |= ACCB_DEVICE_RESET;
1793                 callout_reset(&accb->timer, 2 * hz, ahatimeout, accb);
1794                 aha->recovery_accb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
1795
1796                 /* No Data Transfer */
1797                 aha->recovery_accb->hccb.datain = TRUE;
1798                 aha->recovery_accb->hccb.dataout = TRUE;
1799                 aha->recovery_accb->hccb.ahastat = 0;
1800                 aha->recovery_accb->hccb.sdstat = 0;
1801                 aha->recovery_accb->hccb.target = ccb->ccb_h.target_id;
1802
1803                 /* Tell the adapter about this command */
1804                 paddr = ahaccbvtop(aha, aha->recovery_accb);
1805                 ahautoa24(paddr, aha->cur_outbox->ccb_addr);
1806                 aha->cur_outbox->action_code = AMBO_START;
1807                 aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
1808                 ahanextoutbox(aha);
1809         }
1810 }
1811
1812 int
1813 aha_detach(struct aha_softc *aha)
1814 {
1815         mtx_lock(&aha->lock);
1816         xpt_async(AC_LOST_DEVICE, aha->path, NULL);
1817         xpt_free_path(aha->path);
1818         xpt_bus_deregister(cam_sim_path(aha->sim));
1819         cam_sim_free(aha->sim, /*free_devq*/TRUE);
1820         mtx_unlock(&aha->lock);
1821         /* XXX: Drain all timers? */
1822         return (0);
1823 }
1824 MODULE_DEPEND(aha, cam, 1, 1, 1);