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 consistently.
 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_ABORT:                 /* Abort the specified CCB */
 842                 /* XXX Implement */
 843                 ccb->ccb_h.status = CAM_REQ_INVALID;
 844                 xpt_done(ccb);
 845                 break;
 846         case XPT_SET_TRAN_SETTINGS:
 847                 /* XXX Implement */
 848                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 849                 xpt_done(ccb);
 850                 break;
 851         case XPT_GET_TRAN_SETTINGS:
 852         /* Get default/user set transfer settings for the target */
 853         {
 854                 struct  ccb_trans_settings *cts = &ccb->cts;
 855                 u_int   target_mask = 0x01 << ccb->ccb_h.target_id;
 856                 struct ccb_trans_settings_scsi *scsi =
 857                     &cts->proto_specific.scsi;
 858                 struct ccb_trans_settings_spi *spi =
 859                     &cts->xport_specific.spi;
 860
 861                 cts->protocol = PROTO_SCSI;
 862                 cts->protocol_version = SCSI_REV_2;
 863                 cts->transport = XPORT_SPI;
 864                 cts->transport_version = 2;
 865                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 866                         spi->flags = 0;
 867                         if ((aha->disc_permitted & target_mask) != 0)
 868                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
 869                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 870                         if ((aha->sync_permitted & target_mask) != 0) {
 871                                 if (aha->boardid >= BOARD_1542CF)
 872                                         spi->sync_period = 25;
 873                                 else
 874                                         spi->sync_period = 50;
 875                         } else {
 876                                 spi->sync_period = 0;
 877                         }
 878
 879                         if (spi->sync_period != 0)
 880                                 spi->sync_offset = 15;
 881
 882                         spi->valid = CTS_SPI_VALID_SYNC_RATE
 883                                    | CTS_SPI_VALID_SYNC_OFFSET
 884                                    | CTS_SPI_VALID_BUS_WIDTH
 885                                    | CTS_SPI_VALID_DISC;
 886                         scsi->valid = CTS_SCSI_VALID_TQ;
 887                 } else {
 888                         ahafetchtransinfo(aha, cts);
 889                 }
 890
 891                 ccb->ccb_h.status = CAM_REQ_CMP;
 892                 xpt_done(ccb);
 893                 break;
 894         }
 895         case XPT_CALC_GEOMETRY:
 896         {
 897                 struct    ccb_calc_geometry *ccg;
 898                 uint32_t size_mb;
 899                 uint32_t secs_per_cylinder;
 900
 901                 ccg = &ccb->ccg;
 902                 size_mb = ccg->volume_size
 903                         / ((1024L * 1024L) / ccg->block_size);
 904                 if (size_mb >= 1024 && (aha->extended_trans != 0)) {
 905                         if (size_mb >= 2048) {
 906                                 ccg->heads = 255;
 907                                 ccg->secs_per_track = 63;
 908                         } else {
 909                                 ccg->heads = 128;
 910                                 ccg->secs_per_track = 32;
 911                         }
 912                 } else {
 913                         ccg->heads = 64;
 914                         ccg->secs_per_track = 32;
 915                 }
 916                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 917                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 918                 ccb->ccb_h.status = CAM_REQ_CMP;
 919                 xpt_done(ccb);
 920                 break;
 921         }
 922         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
 923                 ahareset(aha, /*hardreset*/TRUE);
 924                 ccb->ccb_h.status = CAM_REQ_CMP;
 925                 xpt_done(ccb);
 926                 break;
 927         case XPT_TERM_IO:               /* Terminate the I/O process */
 928                 /* XXX Implement */
 929                 ccb->ccb_h.status = CAM_REQ_INVALID;
 930                 xpt_done(ccb);
 931                 break;
 932         case XPT_PATH_INQ:              /* Path routing inquiry */
 933         {
 934                 struct ccb_pathinq *cpi = &ccb->cpi;
 935
 936                 cpi->version_num = 1; /* XXX??? */
 937                 cpi->hba_inquiry = PI_SDTR_ABLE;
 938                 cpi->target_sprt = 0;
 939                 cpi->hba_misc = 0;
 940                 cpi->hba_eng_cnt = 0;
 941                 cpi->max_target = 7;
 942                 cpi->max_lun = 7;
 943                 cpi->initiator_id = aha->scsi_id;
 944                 cpi->bus_id = cam_sim_bus(sim);
 945                 cpi->base_transfer_speed = 3300;
 946                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 947                 strlcpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
 948                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 949                 cpi->unit_number = cam_sim_unit(sim);
 950                 cpi->transport = XPORT_SPI;
 951                 cpi->transport_version = 2;
 952                 cpi->protocol = PROTO_SCSI;
 953                 cpi->protocol_version = SCSI_REV_2;
 954                 cpi->ccb_h.status = CAM_REQ_CMP;
 955                 xpt_done(ccb);
 956                 break;
 957         }
 958         default:
 959                 ccb->ccb_h.status = CAM_REQ_INVALID;
 960                 xpt_done(ccb);
 961                 break;
 962         }
 963 }
 964
 965 static void
 966 ahaexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 967 {
 968         struct   aha_ccb *accb;
 969         union    ccb *ccb;
 970         struct   aha_softc *aha;
 971         uint32_t paddr;
 972
 973         accb = (struct aha_ccb *)arg;
 974         ccb = accb->ccb;
 975         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
 976
 977         if (error != 0) {
 978                 if (error != EFBIG)
 979                         device_printf(aha->dev,
 980                             "Unexepected error 0x%x returned from "
 981                             "bus_dmamap_load\n", error);
 982                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 983                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 984                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 985                 }
 986                 ahafreeccb(aha, accb);
 987                 xpt_done(ccb);
 988                 return;
 989         }
 990
 991         if (nseg != 0) {
 992                 aha_sg_t *sg;
 993                 bus_dma_segment_t *end_seg;
 994                 bus_dmasync_op_t op;
 995
 996                 end_seg = dm_segs + nseg;
 997
 998                 /* Copy the segments into our SG list */
 999                 sg = accb->sg_list;
1000                 while (dm_segs < end_seg) {
1001                         ahautoa24(dm_segs->ds_len, sg->len);
1002                         ahautoa24(dm_segs->ds_addr, sg->addr);
1003                         sg++;
1004                         dm_segs++;
1005                 }
1006
1007                 if (nseg > 1) {
1008                         accb->hccb.opcode = aha->ccb_sg_opcode;
1009                         ahautoa24((sizeof(aha_sg_t) * nseg),
1010                             accb->hccb.data_len);
1011                         ahautoa24(accb->sg_list_phys, accb->hccb.data_addr);
1012                 } else {
1013                         bcopy(accb->sg_list->len, accb->hccb.data_len, 3);
1014                         bcopy(accb->sg_list->addr, accb->hccb.data_addr, 3);
1015                 }
1016
1017                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1018                         op = BUS_DMASYNC_PREREAD;
1019                 else
1020                         op = BUS_DMASYNC_PREWRITE;
1021
1022                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
1023
1024         } else {
1025                 accb->hccb.opcode = INITIATOR_CCB;
1026                 ahautoa24(0, accb->hccb.data_len);
1027                 ahautoa24(0, accb->hccb.data_addr);
1028         }
1029
1030         /*
1031          * Last time we need to check if this CCB needs to
1032          * be aborted.
1033          */
1034         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
1035                 if (nseg != 0)
1036                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
1037                 ahafreeccb(aha, accb);
1038                 xpt_done(ccb);
1039                 return;
1040         }
1041
1042         accb->flags = ACCB_ACTIVE;
1043         ccb->ccb_h.status |= CAM_SIM_QUEUED;
1044         LIST_INSERT_HEAD(&aha->pending_ccbs, &ccb->ccb_h, sim_links.le);
1045
1046         callout_reset_sbt(&accb->timer, SBT_1MS * ccb->ccb_h.timeout, 0,
1047             ahatimeout, accb, 0);
1048
1049         /* Tell the adapter about this command */
1050         if (aha->cur_outbox->action_code != AMBO_FREE) {
1051                 /*
1052                  * We should never encounter a busy mailbox.
1053                  * If we do, warn the user, and treat it as
1054                  * a resource shortage.  If the controller is
1055                  * hung, one of the pending transactions will
1056                  * timeout causing us to start recovery operations.
1057                  */
1058                 device_printf(aha->dev,
1059                     "Encountered busy mailbox with %d out of %d "
1060                     "commands active!!!", aha->active_ccbs, aha->max_ccbs);
1061                 callout_stop(&accb->timer);
1062                 if (nseg != 0)
1063                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
1064                 ahafreeccb(aha, accb);
1065                 aha->resource_shortage = TRUE;
1066                 xpt_freeze_simq(aha->sim, /*count*/1);
1067                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
1068                 xpt_done(ccb);
1069                 return;
1070         }
1071         paddr = ahaccbvtop(aha, accb);
1072         ahautoa24(paddr, aha->cur_outbox->ccb_addr);
1073         aha->cur_outbox->action_code = AMBO_START;
1074         aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
1075
1076         ahanextoutbox(aha);
1077 }
1078
1079 void
1080 aha_intr(void *arg)
1081 {
1082         struct  aha_softc *aha;
1083
1084         aha = arg;
1085         mtx_lock(&aha->lock);
1086         aha_intr_locked(aha);
1087         mtx_unlock(&aha->lock);
1088 }
1089
1090 void
1091 aha_intr_locked(struct aha_softc *aha)
1092 {
1093         u_int   intstat;
1094         uint32_t paddr;
1095
1096         while (((intstat = aha_inb(aha, INTSTAT_REG)) & INTR_PENDING) != 0) {
1097                 if ((intstat & CMD_COMPLETE) != 0) {
1098                         aha->latched_status = aha_inb(aha, STATUS_REG);
1099                         aha->command_cmp = TRUE;
1100                 }
1101
1102                 aha_outb(aha, CONTROL_REG, RESET_INTR);
1103
1104                 if ((intstat & IMB_LOADED) != 0) {
1105                         while (aha->cur_inbox->comp_code != AMBI_FREE) {
1106                                 paddr = aha_a24tou(aha->cur_inbox->ccb_addr);
1107                                 ahadone(aha, ahaccbptov(aha, paddr),
1108                                     aha->cur_inbox->comp_code);
1109                                 aha->cur_inbox->comp_code = AMBI_FREE;
1110                                 ahanextinbox(aha);
1111                         }
1112                 }
1113
1114                 if ((intstat & SCSI_BUS_RESET) != 0) {
1115                         ahareset(aha, /*hardreset*/FALSE);
1116                 }
1117         }
1118 }
1119
1120 static void
1121 ahadone(struct aha_softc *aha, struct aha_ccb *accb, aha_mbi_comp_code_t comp_code)
1122 {
1123         union  ccb        *ccb;
1124         struct ccb_scsiio *csio;
1125
1126         ccb = accb->ccb;
1127         csio = &accb->ccb->csio;
1128
1129         if ((accb->flags & ACCB_ACTIVE) == 0) {
1130                 device_printf(aha->dev,
1131                     "ahadone - Attempt to free non-active ACCB %p\n",
1132                     (void *)accb);
1133                 return;
1134         }
1135
1136         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1137                 bus_dmasync_op_t op;
1138
1139                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1140                         op = BUS_DMASYNC_POSTREAD;
1141                 else
1142                         op = BUS_DMASYNC_POSTWRITE;
1143                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
1144                 bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
1145         }
1146
1147         if (accb == aha->recovery_accb) {
1148                 /*
1149                  * The recovery ACCB does not have a CCB associated
1150                  * with it, so short circuit the normal error handling.
1151                  * We now traverse our list of pending CCBs and process
1152                  * any that were terminated by the recovery CCBs action.
1153                  * We also reinstate timeouts for all remaining, pending,
1154                  * CCBs.
1155                  */
1156                 struct cam_path *path;
1157                 struct ccb_hdr *ccb_h;
1158                 cam_status error;
1159
1160                 /* Notify all clients that a BDR occurred */
1161                 error = xpt_create_path(&path, /*periph*/NULL,
1162                     cam_sim_path(aha->sim), accb->hccb.target,
1163                     CAM_LUN_WILDCARD);
1164
1165                 if (error == CAM_REQ_CMP) {
1166                         xpt_async(AC_SENT_BDR, path, NULL);
1167                         xpt_free_path(path);
1168                 }
1169
1170                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
1171                 while (ccb_h != NULL) {
1172                         struct aha_ccb *pending_accb;
1173
1174                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
1175                         if (pending_accb->hccb.target == accb->hccb.target) {
1176                                 pending_accb->hccb.ahastat = AHASTAT_HA_BDR;
1177                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1178                                 ahadone(aha, pending_accb, AMBI_ERROR);
1179                         } else {
1180                                 callout_reset_sbt(&pending_accb->timer,
1181                                     SBT_1MS * ccb_h->timeout, 0, ahatimeout,
1182                                     pending_accb, 0);
1183                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1184                         }
1185                 }
1186                 device_printf(aha->dev, "No longer in timeout\n");
1187                 return;
1188         }
1189
1190         callout_stop(&accb->timer);
1191
1192         switch (comp_code) {
1193         case AMBI_FREE:
1194                 device_printf(aha->dev,
1195                     "ahadone - CCB completed with free status!\n");
1196                 break;
1197         case AMBI_NOT_FOUND:
1198                 device_printf(aha->dev,
1199                     "ahadone - CCB Abort failed to find CCB\n");
1200                 break;
1201         case AMBI_ABORT:
1202         case AMBI_ERROR:
1203                 /* An error occurred */
1204                 if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
1205                         csio->resid = 0;
1206                 else
1207                         csio->resid = aha_a24tou(accb->hccb.data_len);
1208                 switch(accb->hccb.ahastat) {
1209                 case AHASTAT_DATARUN_ERROR:
1210                 {
1211                         if (csio->resid <= 0) {
1212                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
1213                                 break;
1214                         }
1215                         /* FALLTHROUGH */
1216                 }
1217                 case AHASTAT_NOERROR:
1218                         csio->scsi_status = accb->hccb.sdstat;
1219                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1220                         switch(csio->scsi_status) {
1221                         case SCSI_STATUS_CHECK_COND:
1222                         case SCSI_STATUS_CMD_TERMINATED:
1223                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
1224                                 /*
1225                                  * The aha writes the sense data at different
1226                                  * offsets based on the scsi cmd len
1227                                  */
1228                                 bcopy((caddr_t) &accb->hccb.scsi_cdb +
1229                                     accb->hccb.cmd_len,
1230                                     (caddr_t) &csio->sense_data,
1231                                     accb->hccb.sense_len);
1232                                 break;
1233                         default:
1234                                 break;
1235                         case SCSI_STATUS_OK:
1236                                 csio->ccb_h.status = CAM_REQ_CMP;
1237                                 break;
1238                         }
1239                         break;
1240                 case AHASTAT_SELTIMEOUT:
1241                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
1242                         break;
1243                 case AHASTAT_UNEXPECTED_BUSFREE:
1244                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
1245                         break;
1246                 case AHASTAT_INVALID_PHASE:
1247                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
1248                         break;
1249                 case AHASTAT_INVALID_ACTION_CODE:
1250                         panic("%s: Inavlid Action code", aha_name(aha));
1251                         break;
1252                 case AHASTAT_INVALID_OPCODE:
1253                         if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
1254                                 panic("%s: Invalid CCB Opcode %x hccb = %p",
1255                                     aha_name(aha), accb->hccb.opcode,
1256                                     &accb->hccb);
1257                         device_printf(aha->dev,
1258                             "AHA-1540A compensation failed\n");
1259                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
1260                         csio->ccb_h.status = CAM_REQUEUE_REQ;
1261                         break;
1262                 case AHASTAT_LINKED_CCB_LUN_MISMATCH:
1263                         /* We don't even support linked commands... */
1264                         panic("%s: Linked CCB Lun Mismatch", aha_name(aha));
1265                         break;
1266                 case AHASTAT_INVALID_CCB_OR_SG_PARAM:
1267                         panic("%s: Invalid CCB or SG list", aha_name(aha));
1268                         break;
1269                 case AHASTAT_HA_SCSI_BUS_RESET:
1270                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
1271                             != CAM_CMD_TIMEOUT)
1272                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
1273                         break;
1274                 case AHASTAT_HA_BDR:
1275                         if ((accb->flags & ACCB_DEVICE_RESET) == 0)
1276                                 csio->ccb_h.status = CAM_BDR_SENT;
1277                         else
1278                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
1279                         break;
1280                 }
1281                 if (csio->ccb_h.status != CAM_REQ_CMP) {
1282                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
1283                         csio->ccb_h.status |= CAM_DEV_QFRZN;
1284                 }
1285                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
1286                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1287                 ahafreeccb(aha, accb);
1288                 xpt_done(ccb);
1289                 break;
1290         case AMBI_OK:
1291                 /* All completed without incident */
1292                 /* XXX DO WE NEED TO COPY SENSE BYTES HERE???? XXX */
1293                 /* I don't think so since it works???? */
1294                 ccb->ccb_h.status |= CAM_REQ_CMP;
1295                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
1296                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1297                 ahafreeccb(aha, accb);
1298                 xpt_done(ccb);
1299                 break;
1300         }
1301 }
1302
1303 static int
1304 ahareset(struct aha_softc* aha, int hard_reset)
1305 {
1306         struct   ccb_hdr *ccb_h;
1307         u_int    status;
1308         u_int    timeout;
1309         uint8_t reset_type;
1310
1311         if (hard_reset != 0)
1312                 reset_type = HARD_RESET;
1313         else
1314                 reset_type = SOFT_RESET;
1315         aha_outb(aha, CONTROL_REG, reset_type);
1316
1317         /* Wait 5sec. for Diagnostic start */
1318         timeout = 5 * 10000;
1319         while (--timeout) {
1320                 status = aha_inb(aha, STATUS_REG);
1321                 if ((status & DIAG_ACTIVE) != 0)
1322                         break;
1323                 DELAY(100);
1324         }
1325         if (timeout == 0) {
1326                 PRVERB((aha->dev, "ahareset - Diagnostic Active failed to "
1327                     "assert. status = %#x\n", status));
1328                 return (ETIMEDOUT);
1329         }
1330
1331         /* Wait 10sec. for Diagnostic end */
1332         timeout = 10 * 10000;
1333         while (--timeout) {
1334                 status = aha_inb(aha, STATUS_REG);
1335                 if ((status & DIAG_ACTIVE) == 0)
1336                         break;
1337                 DELAY(100);
1338         }
1339         if (timeout == 0) {
1340                 panic("%s: ahareset - Diagnostic Active failed to drop. "
1341                     "status = 0x%x\n", aha_name(aha), status);
1342                 return (ETIMEDOUT);
1343         }
1344
1345         /* Wait for the host adapter to become ready or report a failure */
1346         timeout = 10000;
1347         while (--timeout) {
1348                 status = aha_inb(aha, STATUS_REG);
1349                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
1350                         break;
1351                 DELAY(100);
1352         }
1353         if (timeout == 0) {
1354                 device_printf(aha->dev, "ahareset - Host adapter failed to "
1355                     "come ready. status = 0x%x\n", status);
1356                 return (ETIMEDOUT);
1357         }
1358
1359         /* If the diagnostics failed, tell the user */
1360         if ((status & DIAG_FAIL) != 0
1361          || (status & HA_READY) == 0) {
1362                 device_printf(aha->dev, "ahareset - Adapter failed diag\n");
1363
1364                 if ((status & DATAIN_REG_READY) != 0)
1365                         device_printf(aha->dev, "ahareset - Host Adapter "
1366                             "Error code = 0x%x\n", aha_inb(aha, DATAIN_REG));
1367                 return (ENXIO);
1368         }
1369
1370         /* If we've attached to the XPT, tell it about the event */
1371         if (aha->path != NULL)
1372                 xpt_async(AC_BUS_RESET, aha->path, NULL);
1373
1374         /*
1375          * Perform completion processing for all outstanding CCBs.
1376          */
1377         while ((ccb_h = LIST_FIRST(&aha->pending_ccbs)) != NULL) {
1378                 struct aha_ccb *pending_accb;
1379
1380                 pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
1381                 pending_accb->hccb.ahastat = AHASTAT_HA_SCSI_BUS_RESET;
1382                 ahadone(aha, pending_accb, AMBI_ERROR);
1383         }
1384
1385         /* If we've allocated mailboxes, initialize them */
1386         /* Must be done after we've aborted our queue, or aha_cmd fails */
1387         if (aha->init_level > 4)
1388                 ahainitmboxes(aha);
1389
1390         return (0);
1391 }
1392
1393 /*
1394  * Send a command to the adapter.
1395  */
1396 int
1397 aha_cmd(struct aha_softc *aha, aha_op_t opcode, uint8_t *params,
1398         u_int param_len, uint8_t *reply_data, u_int reply_len,
1399         u_int cmd_timeout)
1400 {
1401         u_int   timeout;
1402         u_int   status;
1403         u_int   saved_status;
1404         u_int   intstat;
1405         u_int   reply_buf_size;
1406         int     cmd_complete;
1407         int     error;
1408
1409         /* No data returned to start */
1410         reply_buf_size = reply_len;
1411         reply_len = 0;
1412         intstat = 0;
1413         cmd_complete = 0;
1414         saved_status = 0;
1415         error = 0;
1416
1417         /*
1418          * All commands except for the "start mailbox" and the "enable
1419          * outgoing mailbox read interrupt" commands cannot be issued
1420          * while there are pending transactions.  Freeze our SIMQ
1421          * and wait for all completions to occur if necessary.
1422          */
1423         timeout = 10000;
1424         while (LIST_FIRST(&aha->pending_ccbs) != NULL && --timeout) {
1425                 /* Fire the interrupt handler in case interrupts are blocked */
1426                 aha_intr(aha);
1427                 DELAY(10);
1428         }
1429
1430         if (timeout == 0) {
1431                 device_printf(aha->dev,
1432                     "aha_cmd: Timeout waiting for adapter idle\n");
1433                 return (ETIMEDOUT);
1434         }
1435         aha->command_cmp = 0;
1436         /*
1437          * Wait up to 10 sec. for the adapter to become
1438          * ready to accept commands.
1439          */
1440         timeout = 100000;
1441         while (--timeout) {
1442                 status = aha_inb(aha, STATUS_REG);
1443                 if ((status & HA_READY) != 0 && (status & CMD_REG_BUSY) == 0)
1444                         break;
1445                 /*
1446                  * Throw away any pending data which may be
1447                  * left over from earlier commands that we
1448                  * timedout on.
1449                  */
1450                 if ((status & DATAIN_REG_READY) != 0)
1451                         (void)aha_inb(aha, DATAIN_REG);
1452                 DELAY(100);
1453         }
1454         if (timeout == 0) {
1455                 device_printf(aha->dev, "aha_cmd: Timeout waiting for adapter"
1456                     " ready, status = 0x%x\n", status);
1457                 return (ETIMEDOUT);
1458         }
1459
1460         /*
1461          * Send the opcode followed by any necessary parameter bytes.
1462          */
1463         aha_outb(aha, COMMAND_REG, opcode);
1464
1465         /*
1466          * Wait for up to 1sec to get the parameter list sent
1467          */
1468         timeout = 10000;
1469         while (param_len && --timeout) {
1470                 DELAY(100);
1471                 status = aha_inb(aha, STATUS_REG);
1472                 intstat = aha_inb(aha, INTSTAT_REG);
1473
1474                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
1475                  == (INTR_PENDING|CMD_COMPLETE)) {
1476                         saved_status = status;
1477                         cmd_complete = 1;
1478                         break;
1479                 }
1480
1481                 if (aha->command_cmp != 0) {
1482                         saved_status = aha->latched_status;
1483                         cmd_complete = 1;
1484                         break;
1485                 }
1486                 if ((status & DATAIN_REG_READY) != 0)
1487                         break;
1488                 if ((status & CMD_REG_BUSY) == 0) {
1489                         aha_outb(aha, COMMAND_REG, *params++);
1490                         param_len--;
1491                         timeout = 10000;
1492                 }
1493         }
1494         if (timeout == 0) {
1495                 device_printf(aha->dev, "aha_cmd: Timeout sending parameters, "
1496                     "status = 0x%x\n", status);
1497                 error = ETIMEDOUT;
1498         }
1499
1500         /*
1501          * For all other commands, we wait for any output data
1502          * and the final comand completion interrupt.
1503          */
1504         while (cmd_complete == 0 && --cmd_timeout) {
1505
1506                 status = aha_inb(aha, STATUS_REG);
1507                 intstat = aha_inb(aha, INTSTAT_REG);
1508
1509                 if (aha->command_cmp != 0) {
1510                         cmd_complete = 1;
1511                         saved_status = aha->latched_status;
1512                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
1513                         == (INTR_PENDING|CMD_COMPLETE)) {
1514                         /*
1515                          * Our poll (in case interrupts are blocked)
1516                          * saw the CMD_COMPLETE interrupt.
1517                          */
1518                         cmd_complete = 1;
1519                         saved_status = status;
1520                 }
1521                 if ((status & DATAIN_REG_READY) != 0) {
1522                         uint8_t data;
1523
1524                         data = aha_inb(aha, DATAIN_REG);
1525                         if (reply_len < reply_buf_size) {
1526                                 *reply_data++ = data;
1527                         } else {
1528                                 device_printf(aha->dev,
1529                                     "aha_cmd - Discarded reply data "
1530                                     "byte for opcode 0x%x\n", opcode);
1531                         }
1532                         /*
1533                          * Reset timeout to ensure at least a second
1534                          * between response bytes.
1535                          */
1536                         cmd_timeout = MAX(cmd_timeout, 10000);
1537                         reply_len++;
1538                 }
1539                 DELAY(100);
1540         }
1541         if (cmd_timeout == 0) {
1542                 device_printf(aha->dev, "aha_cmd: Timeout: status = 0x%x, "
1543                     "intstat = 0x%x, reply_len = %d\n", status, intstat,
1544                     reply_len);
1545                 return (ETIMEDOUT);
1546         }
1547
1548         /*
1549          * Clear any pending interrupts.  Block interrupts so our
1550          * interrupt handler is not re-entered.
1551          */
1552         aha_intr(aha);
1553
1554         if (error != 0)
1555                 return (error);
1556
1557         /*
1558          * If the command was rejected by the controller, tell the caller.
1559          */
1560         if ((saved_status & CMD_INVALID) != 0) {
1561                 PRVERB((aha->dev, "Invalid Command 0x%x\n", opcode));
1562                 /*
1563                  * Some early adapters may not recover properly from
1564                  * an invalid command.  If it appears that the controller
1565                  * has wedged (i.e. status was not cleared by our interrupt
1566                  * reset above), perform a soft reset.
1567                  */
1568                 DELAY(1000);
1569                 status = aha_inb(aha, STATUS_REG);
1570                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
1571                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
1572                  || (status & (HA_READY|INIT_REQUIRED))
1573                   != (HA_READY|INIT_REQUIRED))
1574                         ahareset(aha, /*hard_reset*/FALSE);
1575                 return (EINVAL);
1576         }
1577
1578         if (param_len > 0) {
1579                 /* The controller did not accept the full argument list */
1580                 PRVERB((aha->dev, "Controller did not accept full argument "
1581                     "list (%d > 0)\n", param_len));
1582                 return (E2BIG);
1583         }
1584
1585         if (reply_len != reply_buf_size) {
1586                 /* Too much or too little data received */
1587                 PRVERB((aha->dev, "data received mismatch (%d != %d)\n",
1588                     reply_len, reply_buf_size));
1589                 return (EMSGSIZE);
1590         }
1591
1592         /* We were successful */
1593         return (0);
1594 }
1595
1596 static int
1597 ahainitmboxes(struct aha_softc *aha)
1598 {
1599         int error;
1600         init_24b_mbox_params_t init_mbox;
1601
1602         bzero(aha->in_boxes, sizeof(aha_mbox_in_t) * aha->num_boxes);
1603         bzero(aha->out_boxes, sizeof(aha_mbox_out_t) * aha->num_boxes);
1604         aha->cur_inbox = aha->in_boxes;
1605         aha->last_inbox = aha->in_boxes + aha->num_boxes - 1;
1606         aha->cur_outbox = aha->out_boxes;
1607         aha->last_outbox = aha->out_boxes + aha->num_boxes - 1;
1608
1609         /* Tell the adapter about them */
1610         init_mbox.num_mboxes = aha->num_boxes;
1611         ahautoa24(aha->mailbox_physbase, init_mbox.base_addr);
1612         error = aha_cmd(aha, AOP_INITIALIZE_MBOX, (uint8_t *)&init_mbox,
1613             /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
1614             /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
1615
1616         if (error != 0)
1617                 printf("ahainitmboxes: Initialization command failed\n");
1618         return (error);
1619 }
1620
1621 /*
1622  * Update the XPT's idea of the negotiated transfer
1623  * parameters for a particular target.
1624  */
1625 static void
1626 ahafetchtransinfo(struct aha_softc *aha, struct ccb_trans_settings* cts)
1627 {
1628         setup_data_t    setup_info;
1629         u_int           target;
1630         u_int           targ_offset;
1631         u_int           sync_period;
1632         int             error;
1633         uint8_t param;
1634         targ_syncinfo_t sync_info;
1635         struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
1636
1637         target = cts->ccb_h.target_id;
1638         targ_offset = (target & 0x7);
1639
1640         /*
1641          * Inquire Setup Information.  This command retreives
1642          * the sync info for older models.
1643          */
1644         param = sizeof(setup_info);
1645         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
1646             (uint8_t*)&setup_info, sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
1647
1648         if (error != 0) {
1649                 device_printf(aha->dev,
1650                     "ahafetchtransinfo - Inquire Setup Info Failed %d\n",
1651                     error);
1652                 return;
1653         }
1654
1655         sync_info = setup_info.syncinfo[targ_offset];
1656
1657         if (sync_info.sync == 0)
1658                 spi->sync_offset = 0;
1659         else
1660                 spi->sync_offset = sync_info.offset;
1661
1662         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1663
1664         if (aha->boardid >= BOARD_1542CF)
1665                 sync_period = 1000;
1666         else
1667                 sync_period = 2000;
1668         sync_period += 500 * sync_info.period;
1669
1670         /* Convert ns value to standard SCSI sync rate */
1671         if (spi->sync_offset != 0)
1672                 spi->sync_period = scsi_calc_syncparam(sync_period);
1673         else
1674                 spi->sync_period = 0;
1675
1676         spi->valid = CTS_SPI_VALID_SYNC_RATE
1677                    | CTS_SPI_VALID_SYNC_OFFSET
1678                    | CTS_SPI_VALID_BUS_WIDTH;
1679         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
1680 }
1681
1682 static void
1683 ahamapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1684 {
1685         struct aha_softc* aha;
1686
1687         aha = (struct aha_softc*)arg;
1688         aha->mailbox_physbase = segs->ds_addr;
1689 }
1690
1691 static void
1692 ahamapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1693 {
1694         struct aha_softc* aha;
1695
1696         aha = (struct aha_softc*)arg;
1697         aha->aha_ccb_physbase = segs->ds_addr;
1698 }
1699
1700 static void
1701 ahamapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1702 {
1703
1704         struct aha_softc* aha;
1705
1706         aha = (struct aha_softc*)arg;
1707         SLIST_FIRST(&aha->sg_maps)->sg_physaddr = segs->ds_addr;
1708 }
1709
1710 static void
1711 ahapoll(struct cam_sim *sim)
1712 {
1713         aha_intr_locked(cam_sim_softc(sim));
1714 }
1715
1716 static void
1717 ahatimeout(void *arg)
1718 {
1719         struct aha_ccb  *accb;
1720         union  ccb      *ccb;
1721         struct aha_softc *aha;
1722         uint32_t        paddr;
1723         struct ccb_hdr *ccb_h;
1724
1725         accb = (struct aha_ccb *)arg;
1726         ccb = accb->ccb;
1727         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
1728         mtx_assert(&aha->lock, MA_OWNED);
1729         xpt_print_path(ccb->ccb_h.path);
1730         printf("CCB %p - timed out\n", (void *)accb);
1731
1732         if ((accb->flags & ACCB_ACTIVE) == 0) {
1733                 xpt_print_path(ccb->ccb_h.path);
1734                 printf("CCB %p - timed out CCB already completed\n",
1735                     (void *)accb);
1736                 return;
1737         }
1738
1739         /*
1740          * In order to simplify the recovery process, we ask the XPT
1741          * layer to halt the queue of new transactions and we traverse
1742          * the list of pending CCBs and remove their timeouts. This
1743          * means that the driver attempts to clear only one error
1744          * condition at a time.  In general, timeouts that occur
1745          * close together are related anyway, so there is no benefit
1746          * in attempting to handle errors in parallel.  Timeouts will
1747          * be reinstated when the recovery process ends.
1748          */
1749         if ((accb->flags & ACCB_DEVICE_RESET) == 0) {
1750                 if ((accb->flags & ACCB_RELEASE_SIMQ) == 0) {
1751                         xpt_freeze_simq(aha->sim, /*count*/1);
1752                         accb->flags |= ACCB_RELEASE_SIMQ;
1753                 }
1754
1755                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
1756                 while (ccb_h != NULL) {
1757                         struct aha_ccb *pending_accb;
1758
1759                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
1760                         callout_stop(&pending_accb->timer);
1761                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1762                 }
1763         }
1764
1765         if ((accb->flags & ACCB_DEVICE_RESET) != 0
1766          || aha->cur_outbox->action_code != AMBO_FREE) {
1767                 /*
1768                  * Try a full host adapter/SCSI bus reset.
1769                  * We do this only if we have already attempted
1770                  * to clear the condition with a BDR, or we cannot
1771                  * attempt a BDR for lack of mailbox resources.
1772                  */
1773                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1774                 ahareset(aha, /*hardreset*/TRUE);
1775                 device_printf(aha->dev, "No longer in timeout\n");
1776         } else {
1777                 /*
1778                  * Send a Bus Device Reset message:
1779                  * The target that is holding up the bus may not
1780                  * be the same as the one that triggered this timeout
1781                  * (different commands have different timeout lengths),
1782                  * but we have no way of determining this from our
1783                  * timeout handler.  Our strategy here is to queue a
1784                  * BDR message to the target of the timed out command.
1785                  * If this fails, we'll get another timeout 2 seconds
1786                  * later which will attempt a bus reset.
1787                  */
1788                 accb->flags |= ACCB_DEVICE_RESET;
1789                 callout_reset(&accb->timer, 2 * hz, ahatimeout, accb);
1790                 aha->recovery_accb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
1791
1792                 /* No Data Transfer */
1793                 aha->recovery_accb->hccb.datain = TRUE;
1794                 aha->recovery_accb->hccb.dataout = TRUE;
1795                 aha->recovery_accb->hccb.ahastat = 0;
1796                 aha->recovery_accb->hccb.sdstat = 0;
1797                 aha->recovery_accb->hccb.target = ccb->ccb_h.target_id;
1798
1799                 /* Tell the adapter about this command */
1800                 paddr = ahaccbvtop(aha, aha->recovery_accb);
1801                 ahautoa24(paddr, aha->cur_outbox->ccb_addr);
1802                 aha->cur_outbox->action_code = AMBO_START;
1803                 aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
1804                 ahanextoutbox(aha);
1805         }
1806 }
1807
1808 int
1809 aha_detach(struct aha_softc *aha)
1810 {
1811         mtx_lock(&aha->lock);
1812         xpt_async(AC_LOST_DEVICE, aha->path, NULL);
1813         xpt_free_path(aha->path);
1814         xpt_bus_deregister(cam_sim_path(aha->sim));
1815         cam_sim_free(aha->sim, /*free_devq*/TRUE);
1816         mtx_unlock(&aha->lock);
1817         /* XXX: Drain all timers? */
1818         return (0);
1819 }
1820 MODULE_DEPEND(aha, cam, 1, 1, 1);