sys/dev/disk/buslogic/bt.c

   1 /*
   2  * Generic driver for the BusLogic MultiMaster SCSI host adapters
   3  * Product specific probe and attach routines can be found in:
   4  * sys/dev/buslogic/bt_isa.c    BT-54X, BT-445 cards
   5  * sys/dev/buslogic/bt_pci.c    BT-946, BT-948, BT-956, BT-958 cards
   6  *
   7  * Copyright (c) 1998, 1999 Justin T. Gibbs.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification, immediately at the beginning of the file.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD: src/sys/dev/buslogic/bt.c,v 1.25.2.1 2000/08/02 22:32:26 peter Exp $
  32  */
  33
  34  /*
  35   * Special thanks to Leonard N. Zubkoff for writing such a complete and
  36   * well documented Mylex/BusLogic MultiMaster driver for Linux.  Support
  37   * in this driver for the wide range of MultiMaster controllers and
  38   * firmware revisions, with their otherwise undocumented quirks, would not
  39   * have been possible without his efforts.
  40   */
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/malloc.h>
  45 #include <sys/buf.h>
  46 #include <sys/kernel.h>
  47 #include <sys/sysctl.h>
  48 #include <sys/bus.h>
  49 #include <sys/rman.h>
  50 #include <sys/thread2.h>
  51
  52 #include <machine/clock.h>
  53
  54 #include <bus/cam/cam.h>
  55 #include <bus/cam/cam_ccb.h>
  56 #include <bus/cam/cam_sim.h>
  57 #include <bus/cam/cam_xpt_sim.h>
  58 #include <bus/cam/cam_debug.h>
  59 #include <bus/cam/scsi/scsi_message.h>
  60
  61 #include <vm/vm.h>
  62 #include <vm/pmap.h>
  63
  64 #include "btreg.h"
  65
  66 /* MailBox Management functions */
  67 static __inline void    btnextinbox(struct bt_softc *bt);
  68 static __inline void    btnextoutbox(struct bt_softc *bt);
  69
  70 static __inline void
  71 btnextinbox(struct bt_softc *bt)
  72 {
  73         if (bt->cur_inbox == bt->last_inbox)
  74                 bt->cur_inbox = bt->in_boxes;
  75         else
  76                 bt->cur_inbox++;
  77 }
  78
  79 static __inline void
  80 btnextoutbox(struct bt_softc *bt)
  81 {
  82         if (bt->cur_outbox == bt->last_outbox)
  83                 bt->cur_outbox = bt->out_boxes;
  84         else
  85                 bt->cur_outbox++;
  86 }
  87
  88 /* CCB Mangement functions */
  89 static __inline u_int32_t               btccbvtop(struct bt_softc *bt,
  90                                                   struct bt_ccb *bccb);
  91 static __inline struct bt_ccb*          btccbptov(struct bt_softc *bt,
  92                                                   u_int32_t ccb_addr);
  93 static __inline u_int32_t               btsensepaddr(struct bt_softc *bt,
  94                                                      struct bt_ccb *bccb);
  95 static __inline struct scsi_sense_data* btsensevaddr(struct bt_softc *bt,
  96                                                      struct bt_ccb *bccb);
  97
  98 static __inline u_int32_t
  99 btccbvtop(struct bt_softc *bt, struct bt_ccb *bccb)
 100 {
 101         return (bt->bt_ccb_physbase
 102               + (u_int32_t)((caddr_t)bccb - (caddr_t)bt->bt_ccb_array));
 103 }
 104
 105 static __inline struct bt_ccb *
 106 btccbptov(struct bt_softc *bt, u_int32_t ccb_addr)
 107 {
 108         return (bt->bt_ccb_array +
 109                 ((struct bt_ccb*)(uintptr_t)ccb_addr-(struct bt_ccb*)(uintptr_t)bt->bt_ccb_physbase));
 110 }
 111
 112 static __inline u_int32_t
 113 btsensepaddr(struct bt_softc *bt, struct bt_ccb *bccb)
 114 {
 115         u_int index;
 116
 117         index = (u_int)(bccb - bt->bt_ccb_array);
 118         return (bt->sense_buffers_physbase
 119                 + (index * sizeof(struct scsi_sense_data)));
 120 }
 121
 122 static __inline struct scsi_sense_data *
 123 btsensevaddr(struct bt_softc *bt, struct bt_ccb *bccb)
 124 {
 125         u_int index;
 126
 127         index = (u_int)(bccb - bt->bt_ccb_array);
 128         return (bt->sense_buffers + index);
 129 }
 130
 131 static __inline struct bt_ccb*  btgetccb(struct bt_softc *bt);
 132 static __inline void            btfreeccb(struct bt_softc *bt,
 133                                           struct bt_ccb *bccb);
 134 static void             btallocccbs(struct bt_softc *bt);
 135 static bus_dmamap_callback_t btexecuteccb;
 136 static void             btdone(struct bt_softc *bt, struct bt_ccb *bccb,
 137                                bt_mbi_comp_code_t comp_code);
 138
 139 /* Host adapter command functions */
 140 static int      btreset(struct bt_softc* bt, int hard_reset);
 141
 142 /* Initialization functions */
 143 static int                      btinitmboxes(struct bt_softc *bt);
 144 static bus_dmamap_callback_t    btmapmboxes;
 145 static bus_dmamap_callback_t    btmapccbs;
 146 static bus_dmamap_callback_t    btmapsgs;
 147
 148 /* Transfer Negotiation Functions */
 149 static void btfetchtransinfo(struct bt_softc *bt,
 150                              struct ccb_trans_settings *cts);
 151
 152 /* CAM SIM entry points */
 153 #define ccb_bccb_ptr spriv_ptr0
 154 #define ccb_bt_ptr spriv_ptr1
 155 static void     btaction(struct cam_sim *sim, union ccb *ccb);
 156 static void     btpoll(struct cam_sim *sim);
 157
 158 /* Our timeout handler */
 159 timeout_t bttimeout;
 160
 161 u_long bt_unit = 0;
 162
 163 /*
 164  * XXX
 165  * Do our own re-probe protection until a configuration
 166  * manager can do it for us.  This ensures that we don't
 167  * reprobe a card already found by the PCI probes.
 168  */
 169 struct bt_isa_port bt_isa_ports[] =
 170 {
 171         { 0x130, 0, 4 },
 172         { 0x134, 0, 5 },
 173         { 0x230, 0, 2 },
 174         { 0x234, 0, 3 },
 175         { 0x330, 0, 0 },
 176         { 0x334, 0, 1 }
 177 };
 178
 179 /*
 180  * I/O ports listed in the order enumerated by the
 181  * card for certain op codes.
 182  */
 183 u_int16_t bt_board_ports[] =
 184 {
 185         0x330,
 186         0x334,
 187         0x230,
 188         0x234,
 189         0x130,
 190         0x134
 191 };
 192
 193 /* Exported functions */
 194 void
 195 bt_init_softc(device_t dev, struct resource *port,
 196               struct resource *irq, struct resource *drq)
 197 {
 198         struct bt_softc *bt = device_get_softc(dev);
 199
 200         SLIST_INIT(&bt->free_bt_ccbs);
 201         LIST_INIT(&bt->pending_ccbs);
 202         SLIST_INIT(&bt->sg_maps);
 203         bt->dev = dev;
 204         bt->unit = device_get_unit(dev);
 205         bt->port = port;
 206         bt->irq = irq;
 207         bt->drq = drq;
 208         bt->tag = rman_get_bustag(port);
 209         bt->bsh = rman_get_bushandle(port);
 210 }
 211
 212 void
 213 bt_free_softc(device_t dev)
 214 {
 215         struct bt_softc *bt = device_get_softc(dev);
 216
 217         switch (bt->init_level) {
 218         default:
 219         case 11:
 220                 bus_dmamap_unload(bt->sense_dmat, bt->sense_dmamap);
 221         case 10:
 222                 bus_dmamem_free(bt->sense_dmat, bt->sense_buffers,
 223                                 bt->sense_dmamap);
 224         case 9:
 225                 bus_dma_tag_destroy(bt->sense_dmat);
 226         case 8:
 227         {
 228                 struct sg_map_node *sg_map;
 229
 230                 while ((sg_map = SLIST_FIRST(&bt->sg_maps))!= NULL) {
 231                         SLIST_REMOVE_HEAD(&bt->sg_maps, links);
 232                         bus_dmamap_unload(bt->sg_dmat,
 233                                           sg_map->sg_dmamap);
 234                         bus_dmamem_free(bt->sg_dmat, sg_map->sg_vaddr,
 235                                         sg_map->sg_dmamap);
 236                         kfree(sg_map, M_DEVBUF);
 237                 }
 238                 bus_dma_tag_destroy(bt->sg_dmat);
 239         }
 240         case 7:
 241                 bus_dmamap_unload(bt->ccb_dmat, bt->ccb_dmamap);
 242         case 6:
 243                 bus_dmamem_free(bt->ccb_dmat, bt->bt_ccb_array,
 244                                 bt->ccb_dmamap);
 245                 bus_dmamap_destroy(bt->ccb_dmat, bt->ccb_dmamap);
 246         case 5:
 247                 bus_dma_tag_destroy(bt->ccb_dmat);
 248         case 4:
 249                 bus_dmamap_unload(bt->mailbox_dmat, bt->mailbox_dmamap);
 250         case 3:
 251                 bus_dmamem_free(bt->mailbox_dmat, bt->in_boxes,
 252                                 bt->mailbox_dmamap);
 253                 bus_dmamap_destroy(bt->mailbox_dmat, bt->mailbox_dmamap);
 254         case 2:
 255                 bus_dma_tag_destroy(bt->buffer_dmat);
 256         case 1:
 257                 bus_dma_tag_destroy(bt->mailbox_dmat);
 258         case 0:
 259                 break;
 260         }
 261 }
 262
 263 int
 264 bt_port_probe(device_t dev, struct bt_probe_info *info)
 265 {
 266         struct bt_softc *bt = device_get_softc(dev);
 267         config_data_t config_data;
 268         int error;
 269
 270         /* See if there is really a card present */
 271         if (bt_probe(dev) || bt_fetch_adapter_info(dev))
 272                 return(1);
 273
 274         /*
 275          * Determine our IRQ, and DMA settings and
 276          * export them to the configuration system.
 277          */
 278         error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
 279                        (u_int8_t*)&config_data, sizeof(config_data),
 280                        DEFAULT_CMD_TIMEOUT);
 281         if (error != 0) {
 282                 kprintf("bt_port_probe: Could not determine IRQ or DMA "
 283                        "settings for adapter.\n");
 284                 return (1);
 285         }
 286
 287         if (bt->model[0] == '5') {
 288                 /* DMA settings only make sense for ISA cards */
 289                 switch (config_data.dma_chan) {
 290                 case DMA_CHAN_5:
 291                         info->drq = 5;
 292                         break;
 293                 case DMA_CHAN_6:
 294                         info->drq = 6;
 295                         break;
 296                 case DMA_CHAN_7:
 297                         info->drq = 7;
 298                         break;
 299                 default:
 300                         kprintf("bt_port_probe: Invalid DMA setting "
 301                                "detected for adapter.\n");
 302                         return (1);
 303                 }
 304         } else {
 305                 /* VL/EISA/PCI DMA */
 306                 info->drq = -1;
 307         }
 308         switch (config_data.irq) {
 309         case IRQ_9:
 310         case IRQ_10:
 311         case IRQ_11:
 312         case IRQ_12:
 313         case IRQ_14:
 314         case IRQ_15:
 315                 info->irq = ffs(config_data.irq) + 8;
 316                 break;
 317         default:
 318                 kprintf("bt_port_probe: Invalid IRQ setting %x"
 319                        "detected for adapter.\n", config_data.irq);
 320                 return (1);
 321         }
 322         return (0);
 323 }
 324
 325 /*
 326  * Probe the adapter and verify that the card is a BusLogic.
 327  */
 328 int
 329 bt_probe(device_t dev)
 330 {
 331         struct bt_softc *bt = device_get_softc(dev);
 332         esetup_info_data_t esetup_info;
 333         u_int    status;
 334         u_int    intstat;
 335         u_int    geometry;
 336         int      error;
 337         u_int8_t param;
 338
 339         /*
 340          * See if the three I/O ports look reasonable.
 341          * Touch the minimal number of registers in the
 342          * failure case.
 343          */
 344         status = bt_inb(bt, STATUS_REG);
 345         if ((status == 0)
 346          || (status & (DIAG_ACTIVE|CMD_REG_BUSY|
 347                        STATUS_REG_RSVD|CMD_INVALID)) != 0) {
 348                 if (bootverbose)
 349                         device_printf(dev, "Failed Status Reg Test - %x\n",
 350                                status);
 351                 return (ENXIO);
 352         }
 353
 354         intstat = bt_inb(bt, INTSTAT_REG);
 355         if ((intstat & INTSTAT_REG_RSVD) != 0) {
 356                 device_printf(dev, "Failed Intstat Reg Test\n");
 357                 return (ENXIO);
 358         }
 359
 360         geometry = bt_inb(bt, GEOMETRY_REG);
 361         if (geometry == 0xFF) {
 362                 if (bootverbose)
 363                         device_printf(dev, "Failed Geometry Reg Test\n");
 364                 return (ENXIO);
 365         }
 366
 367         /*
 368          * Looking good so far.  Final test is to reset the
 369          * adapter and attempt to fetch the extended setup
 370          * information.  This should filter out all 1542 cards.
 371          */
 372         if ((error = btreset(bt, /*hard_reset*/TRUE)) != 0) {
 373                 if (bootverbose)
 374                         device_printf(dev, "Failed Reset\n");
 375                 return (ENXIO);
 376         }
 377
 378         param = sizeof(esetup_info);
 379         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &param, /*parmlen*/1,
 380                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
 381                        DEFAULT_CMD_TIMEOUT);
 382         if (error != 0) {
 383                 return (ENXIO);
 384         }
 385
 386         return (0);
 387 }
 388
 389 /*
 390  * Pull the boards setup information and record it in our softc.
 391  */
 392 int
 393 bt_fetch_adapter_info(device_t dev)
 394 {
 395         struct bt_softc *bt = device_get_softc(dev);
 396         board_id_data_t board_id;
 397         esetup_info_data_t esetup_info;
 398         config_data_t config_data;
 399         int      error;
 400         u_int8_t length_param;
 401
 402         /* First record the firmware version */
 403         error = bt_cmd(bt, BOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
 404                        (u_int8_t*)&board_id, sizeof(board_id),
 405                        DEFAULT_CMD_TIMEOUT);
 406         if (error != 0) {
 407                 device_printf(dev, "bt_fetch_adapter_info - Failed Get Board Info\n");
 408                 return (error);
 409         }
 410         bt->firmware_ver[0] = board_id.firmware_rev_major;
 411         bt->firmware_ver[1] = '.';
 412         bt->firmware_ver[2] = board_id.firmware_rev_minor;
 413         bt->firmware_ver[3] = '\0';
 414
 415         /*
 416          * Depending on the firmware major and minor version,
 417          * we may be able to fetch additional minor version info.
 418          */
 419         if (bt->firmware_ver[0] > '0') {
 420
 421                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_3DIG, NULL, /*parmlen*/0,
 422                                (u_int8_t*)&bt->firmware_ver[3], 1,
 423                                DEFAULT_CMD_TIMEOUT);
 424                 if (error != 0) {
 425                         device_printf(dev,
 426                                       "bt_fetch_adapter_info - Failed Get "
 427                                       "Firmware 3rd Digit\n");
 428                         return (error);
 429                 }
 430                 if (bt->firmware_ver[3] == ' ')
 431                         bt->firmware_ver[3] = '\0';
 432                 bt->firmware_ver[4] = '\0';
 433         }
 434
 435         if (strcmp(bt->firmware_ver, "3.3") >= 0) {
 436
 437                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_4DIG, NULL, /*parmlen*/0,
 438                                (u_int8_t*)&bt->firmware_ver[4], 1,
 439                                DEFAULT_CMD_TIMEOUT);
 440                 if (error != 0) {
 441                         device_printf(dev,
 442                                       "bt_fetch_adapter_info - Failed Get "
 443                                       "Firmware 4th Digit\n");
 444                         return (error);
 445                 }
 446                 if (bt->firmware_ver[4] == ' ')
 447                         bt->firmware_ver[4] = '\0';
 448                 bt->firmware_ver[5] = '\0';
 449         }
 450
 451         /*
 452          * Some boards do not handle the "recently documented"
 453          * Inquire Board Model Number command correctly or do not give
 454          * exact information.  Use the Firmware and Extended Setup
 455          * information in these cases to come up with the right answer.
 456          * The major firmware revision number indicates:
 457          *
 458          *      5.xx    BusLogic "W" Series Host Adapters:
 459          *              BT-948/958/958D
 460          *      4.xx    BusLogic "C" Series Host Adapters:
 461          *              BT-946C/956C/956CD/747C/757C/757CD/445C/545C/540CF
 462          *      3.xx    BusLogic "S" Series Host Adapters:
 463          *              BT-747S/747D/757S/757D/445S/545S/542D
 464          *              BT-542B/742A (revision H)
 465          *      2.xx    BusLogic "A" Series Host Adapters:
 466          *              BT-542B/742A (revision G and below)
 467          */
 468         length_param = sizeof(esetup_info);
 469         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &length_param, /*parmlen*/1,
 470                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
 471                        DEFAULT_CMD_TIMEOUT);
 472         if (error != 0) {
 473                 return (error);
 474         }
 475
 476         bt->bios_addr = esetup_info.bios_addr << 12;
 477
 478         if (esetup_info.bus_type == 'A'
 479          && bt->firmware_ver[0] == '2') {
 480                 ksnprintf(bt->model, sizeof(bt->model), "542B");
 481         } else if (esetup_info.bus_type == 'E'
 482                 && (strncmp(bt->firmware_ver, "2.1", 3) == 0
 483                  || strncmp(bt->firmware_ver, "2.20", 4) == 0)) {
 484                 ksnprintf(bt->model, sizeof(bt->model), "742A");
 485         } else {
 486                 ha_model_data_t model_data;
 487                 int i;
 488
 489                 length_param = sizeof(model_data);
 490                 error = bt_cmd(bt, BOP_INQUIRE_MODEL, &length_param, 1,
 491                                (u_int8_t*)&model_data, sizeof(model_data),
 492                                DEFAULT_CMD_TIMEOUT);
 493                 if (error != 0) {
 494                         device_printf(dev,
 495                                       "bt_fetch_adapter_info - Failed Inquire "
 496                                       "Model Number\n");
 497                         return (error);
 498                 }
 499                 for (i = 0; i < sizeof(model_data.ascii_model); i++) {
 500                         bt->model[i] = model_data.ascii_model[i];
 501                         if (bt->model[i] == ' ')
 502                                 break;
 503                 }
 504                 bt->model[i] = '\0';
 505         }
 506
 507         bt->level_trigger_ints = esetup_info.level_trigger_ints ? 1 : 0;
 508
 509         /* SG element limits */
 510         bt->max_sg = esetup_info.max_sg;
 511
 512         /* Set feature flags */
 513         bt->wide_bus = esetup_info.wide_bus;
 514         bt->diff_bus = esetup_info.diff_bus;
 515         bt->ultra_scsi = esetup_info.ultra_scsi;
 516
 517         if ((bt->firmware_ver[0] == '5')
 518          || (bt->firmware_ver[0] == '4' && bt->wide_bus))
 519                 bt->extended_lun = TRUE;
 520
 521         bt->strict_rr = (strcmp(bt->firmware_ver, "3.31") >= 0);
 522
 523         bt->extended_trans =
 524             ((bt_inb(bt, GEOMETRY_REG) & EXTENDED_TRANSLATION) != 0);
 525
 526         /*
 527          * Determine max CCB count and whether tagged queuing is
 528          * available based on controller type. Tagged queuing
 529          * only works on 'W' series adapters, 'C' series adapters
 530          * with firmware of rev 4.42 and higher, and 'S' series
 531          * adapters with firmware of rev 3.35 and higher.  The
 532          * maximum CCB counts are as follows:
 533          *
 534          *      192     BT-948/958/958D
 535          *      100     BT-946C/956C/956CD/747C/757C/757CD/445C
 536          *      50      BT-545C/540CF
 537          *      30      BT-747S/747D/757S/757D/445S/545S/542D/542B/742A
 538          */
 539         if (bt->firmware_ver[0] == '5') {
 540                 bt->max_ccbs = 192;
 541                 bt->tag_capable = TRUE;
 542         } else if (bt->firmware_ver[0] == '4') {
 543                 if (bt->model[0] == '5')
 544                         bt->max_ccbs = 50;
 545                 else
 546                         bt->max_ccbs = 100;
 547                 bt->tag_capable = (strcmp(bt->firmware_ver, "4.22") >= 0);
 548         } else {
 549                 bt->max_ccbs = 30;
 550                 if (bt->firmware_ver[0] == '3'
 551                  && (strcmp(bt->firmware_ver, "3.35") >= 0))
 552                         bt->tag_capable = TRUE;
 553                 else
 554                         bt->tag_capable = FALSE;
 555         }
 556
 557         if (bt->tag_capable != FALSE)
 558                 bt->tags_permitted = ALL_TARGETS;
 559
 560         /* Determine Sync/Wide/Disc settings */
 561         if (bt->firmware_ver[0] >= '4') {
 562                 auto_scsi_data_t auto_scsi_data;
 563                 fetch_lram_params_t fetch_lram_params;
 564                 int error;
 565
 566                 /*
 567                  * These settings are stored in the
 568                  * AutoSCSI data in LRAM of 'W' and 'C'
 569                  * adapters.
 570                  */
 571                 fetch_lram_params.offset = AUTO_SCSI_BYTE_OFFSET;
 572                 fetch_lram_params.response_len = sizeof(auto_scsi_data);
 573                 error = bt_cmd(bt, BOP_FETCH_LRAM,
 574                                (u_int8_t*)&fetch_lram_params,
 575                                sizeof(fetch_lram_params),
 576                                (u_int8_t*)&auto_scsi_data,
 577                                sizeof(auto_scsi_data), DEFAULT_CMD_TIMEOUT);
 578
 579                 if (error != 0) {
 580                         device_printf(dev,
 581                                       "bt_fetch_adapter_info - Failed "
 582                                       "Get Auto SCSI Info\n");
 583                         return (error);
 584                 }
 585
 586                 bt->disc_permitted = auto_scsi_data.low_disc_permitted
 587                                    | (auto_scsi_data.high_disc_permitted << 8);
 588                 bt->sync_permitted = auto_scsi_data.low_sync_permitted
 589                                    | (auto_scsi_data.high_sync_permitted << 8);
 590                 bt->fast_permitted = auto_scsi_data.low_fast_permitted
 591                                    | (auto_scsi_data.high_fast_permitted << 8);
 592                 bt->ultra_permitted = auto_scsi_data.low_ultra_permitted
 593                                    | (auto_scsi_data.high_ultra_permitted << 8);
 594                 bt->wide_permitted = auto_scsi_data.low_wide_permitted
 595                                    | (auto_scsi_data.high_wide_permitted << 8);
 596
 597                 if (bt->ultra_scsi == FALSE)
 598                         bt->ultra_permitted = 0;
 599
 600                 if (bt->wide_bus == FALSE)
 601                         bt->wide_permitted = 0;
 602         } else {
 603                 /*
 604                  * 'S' and 'A' series have this information in the setup
 605                  * information structure.
 606                  */
 607                 setup_data_t    setup_info;
 608
 609                 length_param = sizeof(setup_info);
 610                 error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &length_param,
 611                                /*paramlen*/1, (u_int8_t*)&setup_info,
 612                                sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
 613
 614                 if (error != 0) {
 615                         device_printf(dev,
 616                                       "bt_fetch_adapter_info - Failed "
 617                                       "Get Setup Info\n");
 618                         return (error);
 619                 }
 620
 621                 if (setup_info.initiate_sync != 0) {
 622                         bt->sync_permitted = ALL_TARGETS;
 623
 624                         if (bt->model[0] == '7') {
 625                                 if (esetup_info.sync_neg10MB != 0)
 626                                         bt->fast_permitted = ALL_TARGETS;
 627                                 if (strcmp(bt->model, "757") == 0)
 628                                         bt->wide_permitted = ALL_TARGETS;
 629                         }
 630                 }
 631                 bt->disc_permitted = ALL_TARGETS;
 632         }
 633
 634         /* We need as many mailboxes as we can have ccbs */
 635         bt->num_boxes = bt->max_ccbs;
 636
 637         /* Determine our SCSI ID */
 638
 639         error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
 640                        (u_int8_t*)&config_data, sizeof(config_data),
 641                        DEFAULT_CMD_TIMEOUT);
 642         if (error != 0) {
 643                 device_printf(dev,
 644                               "bt_fetch_adapter_info - Failed Get Config\n");
 645                 return (error);
 646         }
 647         bt->scsi_id = config_data.scsi_id;
 648
 649         return (0);
 650 }
 651
 652 /*
 653  * Start the board, ready for normal operation
 654  */
 655 int
 656 bt_init(device_t dev)
 657 {
 658         struct bt_softc *bt = device_get_softc(dev);
 659
 660         /* Announce the Adapter */
 661         device_printf(dev, "BT-%s FW Rev. %s ", bt->model, bt->firmware_ver);
 662
 663         if (bt->ultra_scsi != 0)
 664                 kprintf("Ultra ");
 665
 666         if (bt->wide_bus != 0)
 667                 kprintf("Wide ");
 668         else
 669                 kprintf("Narrow ");
 670
 671         if (bt->diff_bus != 0)
 672                 kprintf("Diff ");
 673
 674         kprintf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", bt->scsi_id,
 675                bt->max_ccbs);
 676
 677         /*
 678          * Create our DMA tags.  These tags define the kinds of device
 679          * accessible memory allocations and memory mappings we will
 680          * need to perform during normal operation.
 681          *
 682          * Unless we need to further restrict the allocation, we rely
 683          * on the restrictions of the parent dmat, hence the common
 684          * use of MAXADDR and MAXSIZE.
 685          */
 686
 687         /* DMA tag for mapping buffers into device visible space. */
 688         if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
 689                                /*lowaddr*/BUS_SPACE_MAXADDR,
 690                                /*highaddr*/BUS_SPACE_MAXADDR,
 691                                /*filter*/NULL, /*filterarg*/NULL,
 692                                /*maxsize*/MAXBSIZE, /*nsegments*/BT_NSEG,
 693                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
 694                                /*flags*/BUS_DMA_ALLOCNOW,
 695                                &bt->buffer_dmat) != 0) {
 696                 goto error_exit;
 697         }
 698
 699         bt->init_level++;
 700         /* DMA tag for our mailboxes */
 701         if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
 702                                /*lowaddr*/BUS_SPACE_MAXADDR,
 703                                /*highaddr*/BUS_SPACE_MAXADDR,
 704                                /*filter*/NULL, /*filterarg*/NULL,
 705                                bt->num_boxes * (sizeof(bt_mbox_in_t)
 706                                               + sizeof(bt_mbox_out_t)),
 707                                /*nsegments*/1,
 708                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
 709                                /*flags*/0, &bt->mailbox_dmat) != 0) {
 710                 goto error_exit;
 711         }
 712
 713         bt->init_level++;
 714
 715         /* Allocation for our mailboxes */
 716         if (bus_dmamem_alloc(bt->mailbox_dmat, (void *)&bt->out_boxes,
 717                              BUS_DMA_NOWAIT, &bt->mailbox_dmamap) != 0) {
 718                 goto error_exit;
 719         }
 720
 721         bt->init_level++;
 722
 723         /* And permanently map them */
 724         bus_dmamap_load(bt->mailbox_dmat, bt->mailbox_dmamap,
 725                         bt->out_boxes,
 726                         bt->num_boxes * (sizeof(bt_mbox_in_t)
 727                                        + sizeof(bt_mbox_out_t)),
 728                         btmapmboxes, bt, /*flags*/0);
 729
 730         bt->init_level++;
 731
 732         bt->in_boxes = (bt_mbox_in_t *)&bt->out_boxes[bt->num_boxes];
 733
 734         btinitmboxes(bt);
 735
 736         /* DMA tag for our ccb structures */
 737         if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
 738                                /*lowaddr*/BUS_SPACE_MAXADDR,
 739                                /*highaddr*/BUS_SPACE_MAXADDR,
 740                                /*filter*/NULL, /*filterarg*/NULL,
 741                                bt->max_ccbs * sizeof(struct bt_ccb),
 742                                /*nsegments*/1,
 743                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
 744                                /*flags*/0, &bt->ccb_dmat) != 0) {
 745                 goto error_exit;
 746         }
 747
 748         bt->init_level++;
 749
 750         /* Allocation for our ccbs */
 751         if (bus_dmamem_alloc(bt->ccb_dmat, (void *)&bt->bt_ccb_array,
 752                              BUS_DMA_NOWAIT, &bt->ccb_dmamap) != 0) {
 753                 goto error_exit;
 754         }
 755
 756         bt->init_level++;
 757
 758         /* And permanently map them */
 759         bus_dmamap_load(bt->ccb_dmat, bt->ccb_dmamap,
 760                         bt->bt_ccb_array,
 761                         bt->max_ccbs * sizeof(struct bt_ccb),
 762                         btmapccbs, bt, /*flags*/0);
 763
 764         bt->init_level++;
 765
 766         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
 767         if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
 768                                /*lowaddr*/BUS_SPACE_MAXADDR,
 769                                /*highaddr*/BUS_SPACE_MAXADDR,
 770                                /*filter*/NULL, /*filterarg*/NULL,
 771                                PAGE_SIZE, /*nsegments*/1,
 772                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
 773                                /*flags*/0, &bt->sg_dmat) != 0) {
 774                 goto error_exit;
 775         }
 776
 777         bt->init_level++;
 778
 779         /* Perform initial CCB allocation */
 780         bzero(bt->bt_ccb_array, bt->max_ccbs * sizeof(struct bt_ccb));
 781         btallocccbs(bt);
 782
 783         if (bt->num_ccbs == 0) {
 784                 device_printf(dev,
 785                               "bt_init - Unable to allocate initial ccbs\n");
 786                 goto error_exit;
 787         }
 788
 789         /*
 790          * Note that we are going and return (to probe)
 791          */
 792         return 0;
 793
 794 error_exit:
 795
 796         return (ENXIO);
 797 }
 798
 799 int
 800 bt_attach(device_t dev)
 801 {
 802         struct bt_softc *bt = device_get_softc(dev);
 803         int tagged_dev_openings;
 804         struct cam_devq *devq;
 805         int error;
 806
 807         /*
 808          * We reserve 1 ccb for error recovery, so don't
 809          * tell the XPT about it.
 810          */
 811         if (bt->tag_capable != 0)
 812                 tagged_dev_openings = bt->max_ccbs - 1;
 813         else
 814                 tagged_dev_openings = 0;
 815
 816         /*
 817          * Create the device queue for our SIM.
 818          */
 819         devq = cam_simq_alloc(bt->max_ccbs - 1);
 820         if (devq == NULL)
 821                 return (ENOMEM);
 822
 823         /*
 824          * Construct our SIM entry
 825          */
 826         bt->sim = cam_sim_alloc(btaction, btpoll, "bt", bt, bt->unit,
 827                                 &sim_mplock, 2, tagged_dev_openings, devq);
 828         cam_simq_release(devq);
 829         if (bt->sim == NULL)
 830                 return (ENOMEM);
 831
 832         if (xpt_bus_register(bt->sim, 0) != CAM_SUCCESS) {
 833                 cam_sim_free(bt->sim);
 834                 return (ENXIO);
 835         }
 836
 837         if (xpt_create_path(&bt->path, /*periph*/NULL,
 838                             cam_sim_path(bt->sim), CAM_TARGET_WILDCARD,
 839                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 840                 xpt_bus_deregister(cam_sim_path(bt->sim));
 841                 cam_sim_free(bt->sim);
 842                 return (ENXIO);
 843         }
 844
 845         /*
 846          * Setup interrupt.
 847          */
 848         error = bus_setup_intr(dev, bt->irq, 0,
 849                                bt_intr, bt, &bt->ih, NULL);
 850         if (error) {
 851                 device_printf(dev, "bus_setup_intr() failed: %d\n", error);
 852                 return (error);
 853         }
 854
 855         return (0);
 856 }
 857
 858 int
 859 bt_check_probed_iop(u_int ioport)
 860 {
 861         u_int i;
 862
 863         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
 864                 if (bt_isa_ports[i].addr == ioport) {
 865                         if (bt_isa_ports[i].probed != 0)
 866                                 return (1);
 867                         else {
 868                                 return (0);
 869                         }
 870                 }
 871         }
 872         return (1);
 873 }
 874
 875 void
 876 bt_mark_probed_bio(isa_compat_io_t port)
 877 {
 878         if (port < BIO_DISABLED)
 879                 bt_mark_probed_iop(bt_board_ports[port]);
 880 }
 881
 882 void
 883 bt_mark_probed_iop(u_int ioport)
 884 {
 885         u_int i;
 886
 887         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
 888                 if (ioport == bt_isa_ports[i].addr) {
 889                         bt_isa_ports[i].probed = 1;
 890                         break;
 891                 }
 892         }
 893 }
 894
 895 void
 896 bt_find_probe_range(int ioport, int *port_index, int *max_port_index)
 897 {
 898         if (ioport > 0) {
 899                 int i;
 900
 901                 for (i = 0;i < BT_NUM_ISAPORTS; i++)
 902                         if (ioport <= bt_isa_ports[i].addr)
 903                                 break;
 904                 if ((i >= BT_NUM_ISAPORTS)
 905                  || (ioport != bt_isa_ports[i].addr)) {
 906                         kprintf("\nbt_isa_probe: Invalid baseport of 0x%x specified.\n"
 907                                "bt_isa_probe: Nearest valid baseport is 0x%x.\n"
 908                                "bt_isa_probe: Failing probe.\n",
 909                                ioport,
 910                                (i < BT_NUM_ISAPORTS)
 911                                     ? bt_isa_ports[i].addr
 912                                     : bt_isa_ports[BT_NUM_ISAPORTS - 1].addr);
 913                         *port_index = *max_port_index = -1;
 914                         return;
 915                 }
 916                 *port_index = *max_port_index = bt_isa_ports[i].bio;
 917         } else {
 918                 *port_index = 0;
 919                 *max_port_index = BT_NUM_ISAPORTS - 1;
 920         }
 921 }
 922
 923 int
 924 bt_iop_from_bio(isa_compat_io_t bio_index)
 925 {
 926         if (bio_index >= 0 && bio_index < BT_NUM_ISAPORTS)
 927                 return (bt_board_ports[bio_index]);
 928         return (-1);
 929 }
 930
 931
 932 static void
 933 btallocccbs(struct bt_softc *bt)
 934 {
 935         struct bt_ccb *next_ccb;
 936         struct sg_map_node *sg_map;
 937         bus_addr_t physaddr;
 938         bt_sg_t *segs;
 939         int newcount;
 940         int i;
 941
 942         if (bt->num_ccbs >= bt->max_ccbs)
 943                 /* Can't allocate any more */
 944                 return;
 945
 946         next_ccb = &bt->bt_ccb_array[bt->num_ccbs];
 947
 948         sg_map = kmalloc(sizeof(*sg_map), M_DEVBUF, M_WAITOK);
 949
 950         /* Allocate S/G space for the next batch of CCBS */
 951         if (bus_dmamem_alloc(bt->sg_dmat, (void *)&sg_map->sg_vaddr,
 952                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 953                 kfree(sg_map, M_DEVBUF);
 954                 goto error_exit;
 955         }
 956
 957         SLIST_INSERT_HEAD(&bt->sg_maps, sg_map, links);
 958
 959         bus_dmamap_load(bt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 960                         PAGE_SIZE, btmapsgs, bt, /*flags*/0);
 961
 962         segs = sg_map->sg_vaddr;
 963         physaddr = sg_map->sg_physaddr;
 964
 965         newcount = (PAGE_SIZE / (BT_NSEG * sizeof(bt_sg_t)));
 966         for (i = 0; bt->num_ccbs < bt->max_ccbs && i < newcount; i++) {
 967                 int error;
 968
 969                 next_ccb->sg_list = segs;
 970                 next_ccb->sg_list_phys = physaddr;
 971                 next_ccb->flags = BCCB_FREE;
 972                 error = bus_dmamap_create(bt->buffer_dmat, /*flags*/0,
 973                                           &next_ccb->dmamap);
 974                 if (error != 0)
 975                         break;
 976                 SLIST_INSERT_HEAD(&bt->free_bt_ccbs, next_ccb, links);
 977                 segs += BT_NSEG;
 978                 physaddr += (BT_NSEG * sizeof(bt_sg_t));
 979                 next_ccb++;
 980                 bt->num_ccbs++;
 981         }
 982
 983         /* Reserve a CCB for error recovery */
 984         if (bt->recovery_bccb == NULL) {
 985                 bt->recovery_bccb = SLIST_FIRST(&bt->free_bt_ccbs);
 986                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 987         }
 988
 989         if (SLIST_FIRST(&bt->free_bt_ccbs) != NULL)
 990                 return;
 991
 992 error_exit:
 993         device_printf(bt->dev, "Can't malloc BCCBs\n");
 994 }
 995
 996 static __inline void
 997 btfreeccb(struct bt_softc *bt, struct bt_ccb *bccb)
 998 {
 999         crit_enter();
1000         if ((bccb->flags & BCCB_ACTIVE) != 0)
1001                 LIST_REMOVE(&bccb->ccb->ccb_h, sim_links.le);
1002         if (bt->resource_shortage != 0
1003          && (bccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
1004                 bccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1005                 bt->resource_shortage = FALSE;
1006         }
1007         bccb->flags = BCCB_FREE;
1008         SLIST_INSERT_HEAD(&bt->free_bt_ccbs, bccb, links);
1009         bt->active_ccbs--;
1010         crit_exit();
1011 }
1012
1013 static __inline struct bt_ccb*
1014 btgetccb(struct bt_softc *bt)
1015 {
1016         struct  bt_ccb* bccb;
1017
1018         crit_enter();
1019         if ((bccb = SLIST_FIRST(&bt->free_bt_ccbs)) != NULL) {
1020                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
1021                 bt->active_ccbs++;
1022         } else {
1023                 btallocccbs(bt);
1024                 bccb = SLIST_FIRST(&bt->free_bt_ccbs);
1025                 if (bccb != NULL) {
1026                         SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
1027                         bt->active_ccbs++;
1028                 }
1029         }
1030         crit_exit();
1031
1032         return (bccb);
1033 }
1034
1035 static void
1036 btaction(struct cam_sim *sim, union ccb *ccb)
1037 {
1038         struct  bt_softc *bt;
1039
1040         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("btaction\n"));
1041
1042         bt = (struct bt_softc *)cam_sim_softc(sim);
1043
1044         switch (ccb->ccb_h.func_code) {
1045         /* Common cases first */
1046         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
1047         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
1048         {
1049                 struct  bt_ccb  *bccb;
1050                 struct  bt_hccb *hccb;
1051
1052                 /*
1053                  * get a bccb to use.
1054                  */
1055                 if ((bccb = btgetccb(bt)) == NULL) {
1056                         crit_enter();
1057                         bt->resource_shortage = TRUE;
1058                         crit_exit();
1059                         xpt_freeze_simq(bt->sim, /*count*/1);
1060                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
1061                         xpt_done(ccb);
1062                         return;
1063                 }
1064
1065                 hccb = &bccb->hccb;
1066
1067                 /*
1068                  * So we can find the BCCB when an abort is requested
1069                  */
1070                 bccb->ccb = ccb;
1071                 ccb->ccb_h.ccb_bccb_ptr = bccb;
1072                 ccb->ccb_h.ccb_bt_ptr = bt;
1073
1074                 /*
1075                  * Put all the arguments for the xfer in the bccb
1076                  */
1077                 hccb->target_id = ccb->ccb_h.target_id;
1078                 hccb->target_lun = ccb->ccb_h.target_lun;
1079                 hccb->btstat = 0;
1080                 hccb->sdstat = 0;
1081
1082                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
1083                         struct ccb_scsiio *csio;
1084                         struct ccb_hdr *ccbh;
1085
1086                         csio = &ccb->csio;
1087                         ccbh = &csio->ccb_h;
1088                         hccb->opcode = INITIATOR_CCB_WRESID;
1089                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
1090                         hccb->dataout =(ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
1091                         hccb->cmd_len = csio->cdb_len;
1092                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
1093                                 ccb->ccb_h.status = CAM_REQ_INVALID;
1094                                 btfreeccb(bt, bccb);
1095                                 xpt_done(ccb);
1096                                 return;
1097                         }
1098                         hccb->sense_len = csio->sense_len;
1099                         if ((ccbh->flags & CAM_TAG_ACTION_VALID) != 0
1100                          && ccb->csio.tag_action != CAM_TAG_ACTION_NONE) {
1101                                 hccb->tag_enable = TRUE;
1102                                 hccb->tag_type = (ccb->csio.tag_action & 0x3);
1103                         } else {
1104                                 hccb->tag_enable = FALSE;
1105                                 hccb->tag_type = 0;
1106                         }
1107                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
1108                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
1109                                         bcopy(csio->cdb_io.cdb_ptr,
1110                                               hccb->scsi_cdb, hccb->cmd_len);
1111                                 } else {
1112                                         /* I guess I could map it in... */
1113                                         ccbh->status = CAM_REQ_INVALID;
1114                                         btfreeccb(bt, bccb);
1115                                         xpt_done(ccb);
1116                                         return;
1117                                 }
1118                         } else {
1119                                 bcopy(csio->cdb_io.cdb_bytes,
1120                                       hccb->scsi_cdb, hccb->cmd_len);
1121                         }
1122                         /* If need be, bounce our sense buffer */
1123                         if (bt->sense_buffers != NULL) {
1124                                 hccb->sense_addr = btsensepaddr(bt, bccb);
1125                         } else {
1126                                 hccb->sense_addr = vtophys(&csio->sense_data);
1127                         }
1128                         /*
1129                          * If we have any data to send with this command,
1130                          * map it into bus space.
1131                          */
1132                         /* Only use S/G if there is a transfer */
1133                         if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1134                                 if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
1135                                         /*
1136                                          * We've been given a pointer
1137                                          * to a single buffer.
1138                                          */
1139                                         if ((ccbh->flags & CAM_DATA_PHYS)==0) {
1140                                                 int error;
1141
1142                                                 crit_enter();
1143                                                 error = bus_dmamap_load(
1144                                                     bt->buffer_dmat,
1145                                                     bccb->dmamap,
1146                                                     csio->data_ptr,
1147                                                     csio->dxfer_len,
1148                                                     btexecuteccb,
1149                                                     bccb,
1150                                                     /*flags*/0);
1151                                                 if (error == EINPROGRESS) {
1152                                                         /*
1153                                                          * So as to maintain
1154                                                          * ordering, freeze the
1155                                                          * controller queue
1156                                                          * until our mapping is
1157                                                          * returned.
1158                                                          */
1159                                                         xpt_freeze_simq(bt->sim,
1160                                                                         1);
1161                                                         csio->ccb_h.status |=
1162                                                             CAM_RELEASE_SIMQ;
1163                                                 }
1164                                                 crit_exit();
1165                                         } else {
1166                                                 struct bus_dma_segment seg;
1167
1168                                                 /* Pointer to physical buffer */
1169                                                 seg.ds_addr =
1170                                                     (bus_addr_t)csio->data_ptr;
1171                                                 seg.ds_len = csio->dxfer_len;
1172                                                 btexecuteccb(bccb, &seg, 1, 0);
1173                                         }
1174                                 } else {
1175                                         struct bus_dma_segment *segs;
1176
1177                                         if ((ccbh->flags & CAM_DATA_PHYS) != 0)
1178                                                 panic("btaction - Physical "
1179                                                       "segment pointers "
1180                                                       "unsupported");
1181
1182                                         if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
1183                                                 panic("btaction - Virtual "
1184                                                       "segment addresses "
1185                                                       "unsupported");
1186
1187                                         /* Just use the segments provided */
1188                                         segs = (struct bus_dma_segment *)
1189                                             csio->data_ptr;
1190                                         btexecuteccb(bccb, segs,
1191                                                      csio->sglist_cnt, 0);
1192                                 }
1193                         } else {
1194                                 btexecuteccb(bccb, NULL, 0, 0);
1195                         }
1196                 } else {
1197                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
1198                         /* No data transfer */
1199                         hccb->datain = TRUE;
1200                         hccb->dataout = TRUE;
1201                         hccb->cmd_len = 0;
1202                         hccb->sense_len = 0;
1203                         hccb->tag_enable = FALSE;
1204                         hccb->tag_type = 0;
1205                         btexecuteccb(bccb, NULL, 0, 0);
1206                 }
1207                 break;
1208         }
1209         case XPT_EN_LUN:                /* Enable LUN as a target */
1210         case XPT_TARGET_IO:             /* Execute target I/O request */
1211         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
1212         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
1213         case XPT_ABORT:                 /* Abort the specified CCB */
1214                 /* XXX Implement */
1215                 ccb->ccb_h.status = CAM_REQ_INVALID;
1216                 xpt_done(ccb);
1217                 break;
1218         case XPT_SET_TRAN_SETTINGS:
1219         {
1220                 /* XXX Implement */
1221                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
1222                 xpt_done(ccb);
1223                 break;
1224         }
1225         case XPT_GET_TRAN_SETTINGS:
1226         /* Get default/user set transfer settings for the target */
1227         {
1228                 struct  ccb_trans_settings *cts;
1229                 u_int   target_mask;
1230
1231                 cts = &ccb->cts;
1232                 target_mask = 0x01 << ccb->ccb_h.target_id;
1233                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
1234                         struct ccb_trans_settings_scsi *scsi =
1235                             &cts->proto_specific.scsi;
1236                         struct ccb_trans_settings_spi *spi =
1237                             &cts->xport_specific.spi;
1238                         cts->protocol = PROTO_SCSI;
1239                         cts->protocol_version = SCSI_REV_2;
1240                         cts->transport = XPORT_SPI;
1241                         cts->transport_version = 2;
1242
1243                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
1244                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
1245
1246                         if ((bt->disc_permitted & target_mask) != 0)
1247                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
1248                         if ((bt->tags_permitted & target_mask) != 0)
1249                                 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
1250
1251                         if ((bt->ultra_permitted & target_mask) != 0)
1252                                 spi->sync_period = 12;
1253                         else if ((bt->fast_permitted & target_mask) != 0)
1254                                 spi->sync_period = 25;
1255                         else if ((bt->sync_permitted & target_mask) != 0)
1256                                 spi->sync_period = 50;
1257                         else
1258                                 spi->sync_period = 0;
1259
1260                         if (spi->sync_period != 0)
1261                                 spi->sync_offset = 15;
1262
1263                         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
1264                         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
1265
1266                         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
1267                         if ((bt->wide_permitted & target_mask) != 0)
1268                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
1269                         else
1270                                 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
1271
1272                         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
1273                                 scsi->valid = CTS_SCSI_VALID_TQ;
1274                                 spi->valid |= CTS_SPI_VALID_DISC;
1275                         } else
1276                                 scsi->valid = 0;
1277                 } else {
1278                         btfetchtransinfo(bt, cts);
1279                 }
1280
1281                 ccb->ccb_h.status = CAM_REQ_CMP;
1282                 xpt_done(ccb);
1283                 break;
1284         }
1285         case XPT_CALC_GEOMETRY:
1286         {
1287                 struct    ccb_calc_geometry *ccg;
1288                 u_int32_t size_mb;
1289                 u_int32_t secs_per_cylinder;
1290
1291                 ccg = &ccb->ccg;
1292                 size_mb = ccg->volume_size
1293                         / ((1024L * 1024L) / ccg->block_size);
1294
1295                 if (size_mb >= 1024 && (bt->extended_trans != 0)) {
1296                         if (size_mb >= 2048) {
1297                                 ccg->heads = 255;
1298                                 ccg->secs_per_track = 63;
1299                         } else {
1300                                 ccg->heads = 128;
1301                                 ccg->secs_per_track = 32;
1302                         }
1303                 } else {
1304                         ccg->heads = 64;
1305                         ccg->secs_per_track = 32;
1306                 }
1307                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1308                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1309                 ccb->ccb_h.status = CAM_REQ_CMP;
1310                 xpt_done(ccb);
1311                 break;
1312         }
1313         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1314         {
1315                 btreset(bt, /*hardreset*/TRUE);
1316                 ccb->ccb_h.status = CAM_REQ_CMP;
1317                 xpt_done(ccb);
1318                 break;
1319         }
1320         case XPT_TERM_IO:               /* Terminate the I/O process */
1321                 /* XXX Implement */
1322                 ccb->ccb_h.status = CAM_REQ_INVALID;
1323                 xpt_done(ccb);
1324                 break;
1325         case XPT_PATH_INQ:              /* Path routing inquiry */
1326         {
1327                 struct ccb_pathinq *cpi = &ccb->cpi;
1328
1329                 cpi->version_num = 1; /* XXX??? */
1330                 cpi->hba_inquiry = PI_SDTR_ABLE;
1331                 if (bt->tag_capable != 0)
1332                         cpi->hba_inquiry |= PI_TAG_ABLE;
1333                 if (bt->wide_bus != 0)
1334                         cpi->hba_inquiry |= PI_WIDE_16;
1335                 cpi->target_sprt = 0;
1336                 cpi->hba_misc = 0;
1337                 cpi->hba_eng_cnt = 0;
1338                 cpi->max_target = bt->wide_bus ? 15 : 7;
1339                 cpi->max_lun = 7;
1340                 cpi->initiator_id = bt->scsi_id;
1341                 cpi->bus_id = cam_sim_bus(sim);
1342                 cpi->base_transfer_speed = 3300;
1343                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1344                 strncpy(cpi->hba_vid, "BusLogic", HBA_IDLEN);
1345                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1346                 cpi->unit_number = cam_sim_unit(sim);
1347                 cpi->ccb_h.status = CAM_REQ_CMP;
1348                 cpi->transport = XPORT_SPI;
1349                 cpi->transport_version = 2;
1350                 cpi->protocol = PROTO_SCSI;
1351                 cpi->protocol_version = SCSI_REV_2;
1352                 xpt_done(ccb);
1353                 break;
1354         }
1355         default:
1356                 ccb->ccb_h.status = CAM_REQ_INVALID;
1357                 xpt_done(ccb);
1358                 break;
1359         }
1360 }
1361
1362 static void
1363 btexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
1364 {
1365         struct   bt_ccb *bccb;
1366         union    ccb *ccb;
1367         struct   bt_softc *bt;
1368
1369         bccb = (struct bt_ccb *)arg;
1370         ccb = bccb->ccb;
1371         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
1372
1373         if (error != 0) {
1374                 if (error != EFBIG)
1375                         device_printf(bt->dev,
1376                                       "Unexpected error 0x%x returned from "
1377                                       "bus_dmamap_load\n", error);
1378                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
1379                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
1380                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
1381                 }
1382                 btfreeccb(bt, bccb);
1383                 xpt_done(ccb);
1384                 return;
1385         }
1386
1387         if (nseg != 0) {
1388                 bt_sg_t *sg;
1389                 bus_dma_segment_t *end_seg;
1390                 bus_dmasync_op_t op;
1391
1392                 end_seg = dm_segs + nseg;
1393
1394                 /* Copy the segments into our SG list */
1395                 sg = bccb->sg_list;
1396                 while (dm_segs < end_seg) {
1397                         sg->len = dm_segs->ds_len;
1398                         sg->addr = dm_segs->ds_addr;
1399                         sg++;
1400                         dm_segs++;
1401                 }
1402
1403                 if (nseg > 1) {
1404                         bccb->hccb.opcode = INITIATOR_SG_CCB_WRESID;
1405                         bccb->hccb.data_len = sizeof(bt_sg_t) * nseg;
1406                         bccb->hccb.data_addr = bccb->sg_list_phys;
1407                 } else {
1408                         bccb->hccb.data_len = bccb->sg_list->len;
1409                         bccb->hccb.data_addr = bccb->sg_list->addr;
1410                 }
1411
1412                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1413                         op = BUS_DMASYNC_PREREAD;
1414                 else
1415                         op = BUS_DMASYNC_PREWRITE;
1416
1417                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
1418
1419         } else {
1420                 bccb->hccb.opcode = INITIATOR_CCB;
1421                 bccb->hccb.data_len = 0;
1422                 bccb->hccb.data_addr = 0;
1423         }
1424
1425         crit_enter();
1426
1427         /*
1428          * Last time we need to check if this CCB needs to
1429          * be aborted.
1430          */
1431         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
1432                 if (nseg != 0)
1433                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
1434                 btfreeccb(bt, bccb);
1435                 xpt_done(ccb);
1436                 crit_exit();
1437                 return;
1438         }
1439
1440         bccb->flags = BCCB_ACTIVE;
1441         ccb->ccb_h.status |= CAM_SIM_QUEUED;
1442         LIST_INSERT_HEAD(&bt->pending_ccbs, &ccb->ccb_h, sim_links.le);
1443
1444         callout_reset(&ccb->ccb_h.timeout_ch, (ccb->ccb_h.timeout * hz) / 1000,
1445             bttimeout, bccb);
1446
1447         /* Tell the adapter about this command */
1448         bt->cur_outbox->ccb_addr = btccbvtop(bt, bccb);
1449         if (bt->cur_outbox->action_code != BMBO_FREE) {
1450                 /*
1451                  * We should never encounter a busy mailbox.
1452                  * If we do, warn the user, and treat it as
1453                  * a resource shortage.  If the controller is
1454                  * hung, one of the pending transactions will
1455                  * timeout causing us to start recovery operations.
1456                  */
1457                 device_printf(bt->dev,
1458                               "Encountered busy mailbox with %d out of %d "
1459                               "commands active!!!\n", bt->active_ccbs,
1460                               bt->max_ccbs);
1461                 callout_stop(&ccb->ccb_h.timeout_ch);
1462                 if (nseg != 0)
1463                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
1464                 btfreeccb(bt, bccb);
1465                 bt->resource_shortage = TRUE;
1466                 xpt_freeze_simq(bt->sim, /*count*/1);
1467                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
1468                 xpt_done(ccb);
1469                 return;
1470         }
1471         bt->cur_outbox->action_code = BMBO_START;
1472         bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
1473         btnextoutbox(bt);
1474         crit_exit();
1475 }
1476
1477 void
1478 bt_intr(void *arg)
1479 {
1480         struct  bt_softc *bt;
1481         u_int   intstat;
1482
1483         bt = (struct bt_softc *)arg;
1484         while (((intstat = bt_inb(bt, INTSTAT_REG)) & INTR_PENDING) != 0) {
1485
1486                 if ((intstat & CMD_COMPLETE) != 0) {
1487                         bt->latched_status = bt_inb(bt, STATUS_REG);
1488                         bt->command_cmp = TRUE;
1489                 }
1490
1491                 bt_outb(bt, CONTROL_REG, RESET_INTR);
1492
1493                 if ((intstat & IMB_LOADED) != 0) {
1494                         while (bt->cur_inbox->comp_code != BMBI_FREE) {
1495                                 btdone(bt,
1496                                        btccbptov(bt, bt->cur_inbox->ccb_addr),
1497                                        bt->cur_inbox->comp_code);
1498                                 bt->cur_inbox->comp_code = BMBI_FREE;
1499                                 btnextinbox(bt);
1500                         }
1501                 }
1502
1503                 if ((intstat & SCSI_BUS_RESET) != 0) {
1504                         btreset(bt, /*hardreset*/FALSE);
1505                 }
1506         }
1507 }
1508
1509 static void
1510 btdone(struct bt_softc *bt, struct bt_ccb *bccb, bt_mbi_comp_code_t comp_code)
1511 {
1512         union  ccb        *ccb;
1513         struct ccb_scsiio *csio;
1514
1515         ccb = bccb->ccb;
1516         csio = &bccb->ccb->csio;
1517
1518         if ((bccb->flags & BCCB_ACTIVE) == 0) {
1519                 device_printf(bt->dev,
1520                               "btdone - Attempt to free non-active BCCB %p\n",
1521                               (void *)bccb);
1522                 return;
1523         }
1524
1525         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1526                 bus_dmasync_op_t op;
1527
1528                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1529                         op = BUS_DMASYNC_POSTREAD;
1530                 else
1531                         op = BUS_DMASYNC_POSTWRITE;
1532                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
1533                 bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
1534         }
1535
1536         if (bccb == bt->recovery_bccb) {
1537                 /*
1538                  * The recovery BCCB does not have a CCB associated
1539                  * with it, so short circuit the normal error handling.
1540                  * We now traverse our list of pending CCBs and process
1541                  * any that were terminated by the recovery CCBs action.
1542                  * We also reinstate timeouts for all remaining, pending,
1543                  * CCBs.
1544                  */
1545                 struct cam_path *path;
1546                 struct ccb_hdr *ccb_h;
1547                 cam_status error;
1548
1549                 /* Notify all clients that a BDR occured */
1550                 error = xpt_create_path(&path, /*periph*/NULL,
1551                                         cam_sim_path(bt->sim),
1552                                         bccb->hccb.target_id,
1553                                         CAM_LUN_WILDCARD);
1554
1555                 if (error == CAM_REQ_CMP)
1556                         xpt_async(AC_SENT_BDR, path, NULL);
1557
1558                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
1559                 while (ccb_h != NULL) {
1560                         struct bt_ccb *pending_bccb;
1561
1562                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
1563                         if (pending_bccb->hccb.target_id
1564                          == bccb->hccb.target_id) {
1565                                 pending_bccb->hccb.btstat = BTSTAT_HA_BDR;
1566                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1567                                 btdone(bt, pending_bccb, BMBI_ERROR);
1568                         } else {
1569                                 callout_reset(&ccb_h->timeout_ch,
1570                                     (ccb_h->timeout * hz) / 1000,
1571                                     bttimeout, pending_bccb);
1572                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
1573                         }
1574                 }
1575                 device_printf(bt->dev, "No longer in timeout\n");
1576                 return;
1577         }
1578
1579         callout_stop(&ccb->ccb_h.timeout_ch);
1580
1581         switch (comp_code) {
1582         case BMBI_FREE:
1583                 device_printf(bt->dev,
1584                               "btdone - CCB completed with free status!\n");
1585                 break;
1586         case BMBI_NOT_FOUND:
1587                 device_printf(bt->dev,
1588                               "btdone - CCB Abort failed to find CCB\n");
1589                 break;
1590         case BMBI_ABORT:
1591         case BMBI_ERROR:
1592                 if (bootverbose) {
1593                         kprintf("bt: ccb %p - error %x occurred.  "
1594                                "btstat = %x, sdstat = %x\n",
1595                                (void *)bccb, comp_code, bccb->hccb.btstat,
1596                                bccb->hccb.sdstat);
1597                 }
1598                 /* An error occured */
1599                 switch(bccb->hccb.btstat) {
1600                 case BTSTAT_DATARUN_ERROR:
1601                         if (bccb->hccb.data_len == 0) {
1602                                 /*
1603                                  * At least firmware 4.22, does this
1604                                  * for a QUEUE FULL condition.
1605                                  */
1606                                 bccb->hccb.sdstat = SCSI_STATUS_QUEUE_FULL;
1607                         } else if (bccb->hccb.data_len < 0) {
1608                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
1609                                 break;
1610                         }
1611                         /* FALLTHROUGH */
1612                 case BTSTAT_NOERROR:
1613                 case BTSTAT_LINKED_CMD_COMPLETE:
1614                 case BTSTAT_LINKED_CMD_FLAG_COMPLETE:
1615                 case BTSTAT_DATAUNDERUN_ERROR:
1616
1617                         csio->scsi_status = bccb->hccb.sdstat;
1618                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1619                         switch(csio->scsi_status) {
1620                         case SCSI_STATUS_CHECK_COND:
1621                         case SCSI_STATUS_CMD_TERMINATED:
1622                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
1623                                 /* Bounce sense back if necessary */
1624                                 if (bt->sense_buffers != NULL) {
1625                                         csio->sense_data =
1626                                             *btsensevaddr(bt, bccb);
1627                                 }
1628                                 break;
1629                         default:
1630                                 break;
1631                         case SCSI_STATUS_OK:
1632                                 csio->ccb_h.status = CAM_REQ_CMP;
1633                                 break;
1634                         }
1635                         csio->resid = bccb->hccb.data_len;
1636                         break;
1637                 case BTSTAT_SELTIMEOUT:
1638                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
1639                         break;
1640                 case BTSTAT_UNEXPECTED_BUSFREE:
1641                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
1642                         break;
1643                 case BTSTAT_INVALID_PHASE:
1644                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
1645                         break;
1646                 case BTSTAT_INVALID_ACTION_CODE:
1647                         panic("%s: Inavlid Action code", bt_name(bt));
1648                         break;
1649                 case BTSTAT_INVALID_OPCODE:
1650                         panic("%s: Inavlid CCB Opcode code", bt_name(bt));
1651                         break;
1652                 case BTSTAT_LINKED_CCB_LUN_MISMATCH:
1653                         /* We don't even support linked commands... */
1654                         panic("%s: Linked CCB Lun Mismatch", bt_name(bt));
1655                         break;
1656                 case BTSTAT_INVALID_CCB_OR_SG_PARAM:
1657                         panic("%s: Invalid CCB or SG list", bt_name(bt));
1658                         break;
1659                 case BTSTAT_AUTOSENSE_FAILED:
1660                         csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
1661                         break;
1662                 case BTSTAT_TAGGED_MSG_REJECTED:
1663                 {
1664                         struct ccb_trans_settings neg;
1665                         struct ccb_trans_settings_scsi *scsi =
1666                             &neg.proto_specific.scsi;
1667
1668                         neg.protocol = PROTO_SCSI;
1669                         neg.protocol_version = SCSI_REV_2;
1670                         neg.transport = XPORT_SPI;
1671                         neg.transport_version = 2;
1672                         scsi->valid = CTS_SCSI_VALID_TQ;
1673                         scsi->flags = 0;
1674                         xpt_print_path(csio->ccb_h.path);
1675                         kprintf("refuses tagged commands.  Performing "
1676                                "non-tagged I/O\n");
1677                         xpt_setup_ccb(&neg.ccb_h, csio->ccb_h.path,
1678                                       /*priority*/1);
1679                         xpt_async(AC_TRANSFER_NEG, csio->ccb_h.path, &neg);
1680                         bt->tags_permitted &= ~(0x01 << csio->ccb_h.target_id);
1681                         csio->ccb_h.status = CAM_MSG_REJECT_REC;
1682                         break;
1683                 }
1684                 case BTSTAT_UNSUPPORTED_MSG_RECEIVED:
1685                         /*
1686                          * XXX You would think that this is
1687                          *     a recoverable error... Hmmm.
1688                          */
1689                         csio->ccb_h.status = CAM_REQ_CMP_ERR;
1690                         break;
1691                 case BTSTAT_HA_SOFTWARE_ERROR:
1692                 case BTSTAT_HA_WATCHDOG_ERROR:
1693                 case BTSTAT_HARDWARE_FAILURE:
1694                         /* Hardware reset ??? Can we recover ??? */
1695                         csio->ccb_h.status = CAM_NO_HBA;
1696                         break;
1697                 case BTSTAT_TARGET_IGNORED_ATN:
1698                 case BTSTAT_OTHER_SCSI_BUS_RESET:
1699                 case BTSTAT_HA_SCSI_BUS_RESET:
1700                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
1701                          != CAM_CMD_TIMEOUT)
1702                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
1703                         break;
1704                 case BTSTAT_HA_BDR:
1705                         if ((bccb->flags & BCCB_DEVICE_RESET) == 0)
1706                                 csio->ccb_h.status = CAM_BDR_SENT;
1707                         else
1708                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
1709                         break;
1710                 case BTSTAT_INVALID_RECONNECT:
1711                 case BTSTAT_ABORT_QUEUE_GENERATED:
1712                         csio->ccb_h.status = CAM_REQ_TERMIO;
1713                         break;
1714                 case BTSTAT_SCSI_PERROR_DETECTED:
1715                         csio->ccb_h.status = CAM_UNCOR_PARITY;
1716                         break;
1717                 }
1718                 if (csio->ccb_h.status != CAM_REQ_CMP) {
1719                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
1720                         csio->ccb_h.status |= CAM_DEV_QFRZN;
1721                 }
1722                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
1723                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1724                 btfreeccb(bt, bccb);
1725                 xpt_done(ccb);
1726                 break;
1727         case BMBI_OK:
1728                 /* All completed without incident */
1729                 ccb->ccb_h.status |= CAM_REQ_CMP;
1730                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
1731                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
1732                 btfreeccb(bt, bccb);
1733                 xpt_done(ccb);
1734                 break;
1735         }
1736 }
1737
1738 static int
1739 btreset(struct bt_softc* bt, int hard_reset)
1740 {
1741         struct   ccb_hdr *ccb_h;
1742         u_int    status;
1743         u_int    timeout;
1744         u_int8_t reset_type;
1745
1746         if (hard_reset != 0)
1747                 reset_type = HARD_RESET;
1748         else
1749                 reset_type = SOFT_RESET;
1750         bt_outb(bt, CONTROL_REG, reset_type);
1751
1752         /* Wait 5sec. for Diagnostic start */
1753         timeout = 5 * 10000;
1754         while (--timeout) {
1755                 status = bt_inb(bt, STATUS_REG);
1756                 if ((status & DIAG_ACTIVE) != 0)
1757                         break;
1758                 DELAY(100);
1759         }
1760         if (timeout == 0) {
1761                 if (bootverbose)
1762                         kprintf("%s: btreset - Diagnostic Active failed to "
1763                                 "assert. status = 0x%x\n", bt_name(bt), status);
1764                 return (ETIMEDOUT);
1765         }
1766
1767         /* Wait 10sec. for Diagnostic end */
1768         timeout = 10 * 10000;
1769         while (--timeout) {
1770                 status = bt_inb(bt, STATUS_REG);
1771                 if ((status & DIAG_ACTIVE) == 0)
1772                         break;
1773                 DELAY(100);
1774         }
1775         if (timeout == 0) {
1776                 panic("%s: btreset - Diagnostic Active failed to drop. "
1777                        "status = 0x%x\n", bt_name(bt), status);
1778                 return (ETIMEDOUT);
1779         }
1780
1781         /* Wait for the host adapter to become ready or report a failure */
1782         timeout = 10000;
1783         while (--timeout) {
1784                 status = bt_inb(bt, STATUS_REG);
1785                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
1786                         break;
1787                 DELAY(100);
1788         }
1789         if (timeout == 0) {
1790                 kprintf("%s: btreset - Host adapter failed to come ready. "
1791                        "status = 0x%x\n", bt_name(bt), status);
1792                 return (ETIMEDOUT);
1793         }
1794
1795         /* If the diagnostics failed, tell the user */
1796         if ((status & DIAG_FAIL) != 0
1797          || (status & HA_READY) == 0) {
1798                 kprintf("%s: btreset - Adapter failed diagnostics\n",
1799                        bt_name(bt));
1800
1801                 if ((status & DATAIN_REG_READY) != 0)
1802                         kprintf("%s: btreset - Host Adapter Error code = 0x%x\n",
1803                                bt_name(bt), bt_inb(bt, DATAIN_REG));
1804                 return (ENXIO);
1805         }
1806
1807         /* If we've allocated mailboxes, initialize them */
1808         if (bt->init_level > 4)
1809                 btinitmboxes(bt);
1810
1811         /* If we've attached to the XPT, tell it about the event */
1812         if (bt->path != NULL)
1813                 xpt_async(AC_BUS_RESET, bt->path, NULL);
1814
1815         /*
1816          * Perform completion processing for all outstanding CCBs.
1817          */
1818         while ((ccb_h = LIST_FIRST(&bt->pending_ccbs)) != NULL) {
1819                 struct bt_ccb *pending_bccb;
1820
1821                 pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
1822                 pending_bccb->hccb.btstat = BTSTAT_HA_SCSI_BUS_RESET;
1823                 btdone(bt, pending_bccb, BMBI_ERROR);
1824         }
1825
1826         return (0);
1827 }
1828
1829 /*
1830  * Send a command to the adapter.
1831  */
1832 int
1833 bt_cmd(struct bt_softc *bt, bt_op_t opcode, u_int8_t *params, u_int param_len,
1834       u_int8_t *reply_data, u_int reply_len, u_int cmd_timeout)
1835 {
1836         u_int   timeout;
1837         u_int   status;
1838         u_int   saved_status;
1839         u_int   intstat;
1840         u_int   reply_buf_size;
1841         int     cmd_complete;
1842         int     error;
1843
1844         /* No data returned to start */
1845         reply_buf_size = reply_len;
1846         reply_len = 0;
1847         intstat = 0;
1848         cmd_complete = 0;
1849         saved_status = 0;
1850         error = 0;
1851
1852         bt->command_cmp = 0;
1853         /*
1854          * Wait up to 10 sec. for the adapter to become
1855          * ready to accept commands.
1856          */
1857         timeout = 100000;
1858         while (--timeout) {
1859                 status = bt_inb(bt, STATUS_REG);
1860                 if ((status & HA_READY) != 0
1861                  && (status & CMD_REG_BUSY) == 0)
1862                         break;
1863                 /*
1864                  * Throw away any pending data which may be
1865                  * left over from earlier commands that we
1866                  * timedout on.
1867                  */
1868                 if ((status & DATAIN_REG_READY) != 0)
1869                         (void)bt_inb(bt, DATAIN_REG);
1870                 DELAY(100);
1871         }
1872         if (timeout == 0) {
1873                 kprintf("%s: bt_cmd: Timeout waiting for adapter ready, "
1874                        "status = 0x%x\n", bt_name(bt), status);
1875                 return (ETIMEDOUT);
1876         }
1877
1878         /*
1879          * Send the opcode followed by any necessary parameter bytes.
1880          */
1881         bt_outb(bt, COMMAND_REG, opcode);
1882
1883         /*
1884          * Wait for up to 1sec for each byte of the the
1885          * parameter list sent to be sent.
1886          */
1887         timeout = 10000;
1888         while (param_len && --timeout) {
1889                 DELAY(100);
1890                 crit_enter();
1891                 status = bt_inb(bt, STATUS_REG);
1892                 intstat = bt_inb(bt, INTSTAT_REG);
1893                 crit_exit();
1894
1895                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
1896                  == (INTR_PENDING|CMD_COMPLETE)) {
1897                         saved_status = status;
1898                         cmd_complete = 1;
1899                         break;
1900                 }
1901                 if (bt->command_cmp != 0) {
1902                         saved_status = bt->latched_status;
1903                         cmd_complete = 1;
1904                         break;
1905                 }
1906                 if ((status & DATAIN_REG_READY) != 0)
1907                         break;
1908                 if ((status & CMD_REG_BUSY) == 0) {
1909                         bt_outb(bt, COMMAND_REG, *params++);
1910                         param_len--;
1911                         timeout = 10000;
1912                 }
1913         }
1914         if (timeout == 0) {
1915                 kprintf("%s: bt_cmd: Timeout sending parameters, "
1916                        "status = 0x%x\n", bt_name(bt), status);
1917                 cmd_complete = 1;
1918                 saved_status = status;
1919                 error = ETIMEDOUT;
1920         }
1921
1922         /*
1923          * Wait for the command to complete.
1924          */
1925         while (cmd_complete == 0 && --cmd_timeout) {
1926
1927                 crit_enter();
1928                 status = bt_inb(bt, STATUS_REG);
1929                 intstat = bt_inb(bt, INTSTAT_REG);
1930                 /*
1931                  * It may be that this command was issued with
1932                  * controller interrupts disabled.  We'll never
1933                  * get to our command if an incoming mailbox
1934                  * interrupt is pending, so take care of completed
1935                  * mailbox commands by calling our interrupt handler.
1936                  */
1937                 if ((intstat & (INTR_PENDING|IMB_LOADED))
1938                  == (INTR_PENDING|IMB_LOADED))
1939                         bt_intr(bt);
1940                 crit_exit();
1941
1942                 if (bt->command_cmp != 0) {
1943                         /*
1944                          * Our interrupt handler saw CMD_COMPLETE
1945                          * status before we did.
1946                          */
1947                         cmd_complete = 1;
1948                         saved_status = bt->latched_status;
1949                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
1950                         == (INTR_PENDING|CMD_COMPLETE)) {
1951                         /*
1952                          * Our poll (in case interrupts are blocked)
1953                          * saw the CMD_COMPLETE interrupt.
1954                          */
1955                         cmd_complete = 1;
1956                         saved_status = status;
1957                 } else if (opcode == BOP_MODIFY_IO_ADDR
1958                         && (status & CMD_REG_BUSY) == 0) {
1959                         /*
1960                          * The BOP_MODIFY_IO_ADDR does not issue a CMD_COMPLETE,
1961                          * but it should update the status register.  So, we
1962                          * consider this command complete when the CMD_REG_BUSY
1963                          * status clears.
1964                          */
1965                         saved_status = status;
1966                         cmd_complete = 1;
1967                 } else if ((status & DATAIN_REG_READY) != 0) {
1968                         u_int8_t data;
1969
1970                         data = bt_inb(bt, DATAIN_REG);
1971                         if (reply_len < reply_buf_size) {
1972                                 *reply_data++ = data;
1973                         } else {
1974                                 kprintf("%s: bt_cmd - Discarded reply data byte "
1975                                        "for opcode 0x%x\n", bt_name(bt),
1976                                        opcode);
1977                         }
1978                         /*
1979                          * Reset timeout to ensure at least a second
1980                          * between response bytes.
1981                          */
1982                         cmd_timeout = MAX(cmd_timeout, 10000);
1983                         reply_len++;
1984
1985                 } else if ((opcode == BOP_FETCH_LRAM)
1986                         && (status & HA_READY) != 0) {
1987                                 saved_status = status;
1988                                 cmd_complete = 1;
1989                 }
1990                 DELAY(100);
1991         }
1992         if (cmd_timeout == 0) {
1993                 kprintf("%s: bt_cmd: Timeout waiting for command (%x) "
1994                        "to complete.\n%s: status = 0x%x, intstat = 0x%x, "
1995                        "rlen %d\n", bt_name(bt), opcode,
1996                        bt_name(bt), status, intstat, reply_len);
1997                 error = (ETIMEDOUT);
1998         }
1999
2000         /*
2001          * Clear any pending interrupts.  Block interrupts so our
2002          * interrupt handler is not re-entered.
2003          */
2004         crit_enter();
2005         bt_intr(bt);
2006         crit_exit();
2007
2008         if (error != 0)
2009                 return (error);
2010
2011         /*
2012          * If the command was rejected by the controller, tell the caller.
2013          */
2014         if ((saved_status & CMD_INVALID) != 0) {
2015                 /*
2016                  * Some early adapters may not recover properly from
2017                  * an invalid command.  If it appears that the controller
2018                  * has wedged (i.e. status was not cleared by our interrupt
2019                  * reset above), perform a soft reset.
2020                  */
2021                 if (bootverbose)
2022                         kprintf("%s: Invalid Command 0x%x\n", bt_name(bt),
2023                                 opcode);
2024                 DELAY(1000);
2025                 status = bt_inb(bt, STATUS_REG);
2026                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
2027                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
2028                  || (status & (HA_READY|INIT_REQUIRED))
2029                   != (HA_READY|INIT_REQUIRED)) {
2030                         btreset(bt, /*hard_reset*/FALSE);
2031                 }
2032                 return (EINVAL);
2033         }
2034
2035         if (param_len > 0) {
2036                 /* The controller did not accept the full argument list */
2037                 return (E2BIG);
2038         }
2039
2040         if (reply_len != reply_buf_size) {
2041                 /* Too much or too little data received */
2042                 return (EMSGSIZE);
2043         }
2044
2045         /* We were successful */
2046         return (0);
2047 }
2048
2049 static int
2050 btinitmboxes(struct bt_softc *bt) {
2051         init_32b_mbox_params_t init_mbox;
2052         int error;
2053
2054         bzero(bt->in_boxes, sizeof(bt_mbox_in_t) * bt->num_boxes);
2055         bzero(bt->out_boxes, sizeof(bt_mbox_out_t) * bt->num_boxes);
2056         bt->cur_inbox = bt->in_boxes;
2057         bt->last_inbox = bt->in_boxes + bt->num_boxes - 1;
2058         bt->cur_outbox = bt->out_boxes;
2059         bt->last_outbox = bt->out_boxes + bt->num_boxes - 1;
2060
2061         /* Tell the adapter about them */
2062         init_mbox.num_boxes = bt->num_boxes;
2063         init_mbox.base_addr[0] = bt->mailbox_physbase & 0xFF;
2064         init_mbox.base_addr[1] = (bt->mailbox_physbase >> 8) & 0xFF;
2065         init_mbox.base_addr[2] = (bt->mailbox_physbase >> 16) & 0xFF;
2066         init_mbox.base_addr[3] = (bt->mailbox_physbase >> 24) & 0xFF;
2067         error = bt_cmd(bt, BOP_INITIALIZE_32BMBOX, (u_int8_t *)&init_mbox,
2068                        /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
2069                        /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
2070
2071         if (error != 0)
2072                 kprintf("btinitmboxes: Initialization command failed\n");
2073         else if (bt->strict_rr != 0) {
2074                 /*
2075                  * If the controller supports
2076                  * strict round robin mode,
2077                  * enable it
2078                  */
2079                 u_int8_t param;
2080
2081                 param = 0;
2082                 error = bt_cmd(bt, BOP_ENABLE_STRICT_RR, &param, 1,
2083                                /*reply_buf*/NULL, /*reply_len*/0,
2084                                DEFAULT_CMD_TIMEOUT);
2085
2086                 if (error != 0) {
2087                         kprintf("btinitmboxes: Unable to enable strict RR\n");
2088                         error = 0;
2089                 } else if (bootverbose) {
2090                         kprintf("%s: Using Strict Round Robin Mailbox Mode\n",
2091                                bt_name(bt));
2092                 }
2093         }
2094
2095         return (error);
2096 }
2097
2098 /*
2099  * Update the XPT's idea of the negotiated transfer
2100  * parameters for a particular target.
2101  */
2102 static void
2103 btfetchtransinfo(struct bt_softc *bt, struct ccb_trans_settings *cts)
2104 {
2105         setup_data_t    setup_info;
2106         u_int           target;
2107         u_int           targ_offset;
2108         u_int           targ_mask;
2109         u_int           sync_period;
2110         u_int           sync_offset;
2111         u_int           bus_width;
2112         int             error;
2113         u_int8_t        param;
2114         targ_syncinfo_t sync_info;
2115         struct ccb_trans_settings_scsi *scsi =
2116             &cts->proto_specific.scsi;
2117         struct ccb_trans_settings_spi *spi =
2118             &cts->xport_specific.spi;
2119
2120         spi->valid = 0;
2121         scsi->valid = 0;
2122
2123         target = cts->ccb_h.target_id;
2124         targ_offset = (target & 0x7);
2125         targ_mask = (0x01 << targ_offset);
2126
2127         /*
2128          * Inquire Setup Information.  This command retreives the
2129          * Wide negotiation status for recent adapters as well as
2130          * the sync info for older models.
2131          */
2132         param = sizeof(setup_info);
2133         error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
2134                        (u_int8_t*)&setup_info, sizeof(setup_info),
2135                        DEFAULT_CMD_TIMEOUT);
2136
2137         if (error != 0) {
2138                 kprintf("%s: btfetchtransinfo - Inquire Setup Info Failed %x\n",
2139                        bt_name(bt), error);
2140                 return;
2141         }
2142
2143         sync_info = (target < 8) ? setup_info.low_syncinfo[targ_offset]
2144                                  : setup_info.high_syncinfo[targ_offset];
2145
2146         if (sync_info.sync == 0)
2147                 sync_offset = 0;
2148         else
2149                 sync_offset = sync_info.offset;
2150
2151
2152         bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2153         if (strcmp(bt->firmware_ver, "5.06L") >= 0) {
2154                 u_int wide_active;
2155
2156                 wide_active =
2157                     (target < 8) ? (setup_info.low_wide_active & targ_mask)
2158                                  : (setup_info.high_wide_active & targ_mask);
2159
2160                 if (wide_active)
2161                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2162         } else if ((bt->wide_permitted & targ_mask) != 0) {
2163                 struct ccb_getdev cgd;
2164
2165                 /*
2166                  * Prior to rev 5.06L, wide status isn't provided,
2167                  * so we "guess" that wide transfers are in effect
2168                  * if the user settings allow for wide and the inquiry
2169                  * data for the device indicates that it can handle
2170                  * wide transfers.
2171                  */
2172                 xpt_setup_ccb(&cgd.ccb_h, cts->ccb_h.path, /*priority*/1);
2173                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2174                 xpt_action((union ccb *)&cgd);
2175                 if ((cgd.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
2176                  && (cgd.inq_data.flags & SID_WBus16) != 0)
2177                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2178         }
2179
2180         if (bt->firmware_ver[0] >= '3') {
2181                 /*
2182                  * For adapters that can do fast or ultra speeds,
2183                  * use the more exact Target Sync Information command.
2184                  */
2185                 target_sync_info_data_t sync_info;
2186
2187                 param = sizeof(sync_info);
2188                 error = bt_cmd(bt, BOP_TARG_SYNC_INFO, &param, /*paramlen*/1,
2189                                (u_int8_t*)&sync_info, sizeof(sync_info),
2190                                DEFAULT_CMD_TIMEOUT);
2191
2192                 if (error != 0) {
2193                         kprintf("%s: btfetchtransinfo - Inquire Sync "
2194                                "Info Failed 0x%x\n", bt_name(bt), error);
2195                         return;
2196                 }
2197                 sync_period = sync_info.sync_rate[target] * 100;
2198         } else {
2199                 sync_period = 2000 + (500 * sync_info.period);
2200         }
2201
2202         cts->protocol = PROTO_SCSI;
2203         cts->protocol_version = SCSI_REV_2;
2204         cts->transport = XPORT_SPI;
2205         cts->transport_version = 2;
2206
2207         spi->sync_period = sync_period;
2208         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
2209         spi->sync_offset = sync_offset;
2210         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
2211
2212         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
2213         spi->bus_width = bus_width;
2214
2215         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
2216                 scsi->valid = CTS_SCSI_VALID_TQ;
2217                 spi->valid |= CTS_SPI_VALID_DISC;
2218         } else
2219                 scsi->valid = 0;
2220
2221         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
2222 }
2223
2224 static void
2225 btmapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
2226 {
2227         struct bt_softc* bt;
2228
2229         bt = (struct bt_softc*)arg;
2230         bt->mailbox_physbase = segs->ds_addr;
2231 }
2232
2233 static void
2234 btmapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
2235 {
2236         struct bt_softc* bt;
2237
2238         bt = (struct bt_softc*)arg;
2239         bt->bt_ccb_physbase = segs->ds_addr;
2240 }
2241
2242 static void
2243 btmapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
2244 {
2245
2246         struct bt_softc* bt;
2247
2248         bt = (struct bt_softc*)arg;
2249         SLIST_FIRST(&bt->sg_maps)->sg_physaddr = segs->ds_addr;
2250 }
2251
2252 static void
2253 btpoll(struct cam_sim *sim)
2254 {
2255         bt_intr(cam_sim_softc(sim));
2256 }
2257
2258 void
2259 bttimeout(void *arg)
2260 {
2261         struct bt_ccb   *bccb;
2262         union  ccb      *ccb;
2263         struct bt_softc *bt;
2264
2265         bccb = (struct bt_ccb *)arg;
2266         ccb = bccb->ccb;
2267         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
2268         xpt_print_path(ccb->ccb_h.path);
2269         kprintf("CCB %p - timed out\n", (void *)bccb);
2270
2271         crit_enter();
2272
2273         if ((bccb->flags & BCCB_ACTIVE) == 0) {
2274                 xpt_print_path(ccb->ccb_h.path);
2275                 kprintf("CCB %p - timed out CCB already completed\n",
2276                        (void *)bccb);
2277                 crit_exit();
2278                 return;
2279         }
2280
2281         /*
2282          * In order to simplify the recovery process, we ask the XPT
2283          * layer to halt the queue of new transactions and we traverse
2284          * the list of pending CCBs and remove their timeouts. This
2285          * means that the driver attempts to clear only one error
2286          * condition at a time.  In general, timeouts that occur
2287          * close together are related anyway, so there is no benefit
2288          * in attempting to handle errors in parrallel.  Timeouts will
2289          * be reinstated when the recovery process ends.
2290          */
2291         if ((bccb->flags & BCCB_DEVICE_RESET) == 0) {
2292                 struct ccb_hdr *ccb_h;
2293
2294                 if ((bccb->flags & BCCB_RELEASE_SIMQ) == 0) {
2295                         xpt_freeze_simq(bt->sim, /*count*/1);
2296                         bccb->flags |= BCCB_RELEASE_SIMQ;
2297                 }
2298
2299                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
2300                 while (ccb_h != NULL) {
2301                         struct bt_ccb *pending_bccb;
2302
2303                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
2304                         callout_stop(&ccb_h->timeout_ch);
2305                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
2306                 }
2307         }
2308
2309         if ((bccb->flags & BCCB_DEVICE_RESET) != 0
2310          || bt->cur_outbox->action_code != BMBO_FREE
2311          || ((bccb->hccb.tag_enable == TRUE)
2312           && (bt->firmware_ver[0] < '5'))) {
2313                 /*
2314                  * Try a full host adapter/SCSI bus reset.
2315                  * We do this only if we have already attempted
2316                  * to clear the condition with a BDR, or we cannot
2317                  * attempt a BDR for lack of mailbox resources
2318                  * or because of faulty firmware.  It turns out
2319                  * that firmware versions prior to 5.xx treat BDRs
2320                  * as untagged commands that cannot be sent until
2321                  * all outstanding tagged commands have been processed.
2322                  * This makes it somewhat difficult to use a BDR to
2323                  * clear up a problem with an uncompleted tagged command.
2324                  */
2325                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
2326                 btreset(bt, /*hardreset*/TRUE);
2327                 kprintf("%s: No longer in timeout\n", bt_name(bt));
2328         } else {
2329                 /*
2330                  * Send a Bus Device Reset message:
2331                  * The target that is holding up the bus may not
2332                  * be the same as the one that triggered this timeout
2333                  * (different commands have different timeout lengths),
2334                  * but we have no way of determining this from our
2335                  * timeout handler.  Our strategy here is to queue a
2336                  * BDR message to the target of the timed out command.
2337                  * If this fails, we'll get another timeout 2 seconds
2338                  * later which will attempt a bus reset.
2339                  */
2340                 bccb->flags |= BCCB_DEVICE_RESET;
2341                 callout_reset(&ccb->ccb_h.timeout_ch, 2 * hz, bttimeout, bccb);
2342
2343                 bt->recovery_bccb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
2344
2345                 /* No Data Transfer */
2346                 bt->recovery_bccb->hccb.datain = TRUE;
2347                 bt->recovery_bccb->hccb.dataout = TRUE;
2348                 bt->recovery_bccb->hccb.btstat = 0;
2349                 bt->recovery_bccb->hccb.sdstat = 0;
2350                 bt->recovery_bccb->hccb.target_id = ccb->ccb_h.target_id;
2351
2352                 /* Tell the adapter about this command */
2353                 bt->cur_outbox->ccb_addr = btccbvtop(bt, bt->recovery_bccb);
2354                 bt->cur_outbox->action_code = BMBO_START;
2355                 bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
2356                 btnextoutbox(bt);
2357         }
2358
2359         crit_exit();
2360 }
2361