The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/buslogic/bt.c

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    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_mca.c    BT-64X, SDC3211B, SDC3211F
    6  * sys/dev/buslogic/bt_eisa.c   BT-74X, BT-75x cards, SDC3222F
    7  * sys/dev/buslogic/bt_pci.c    BT-946, BT-948, BT-956, BT-958 cards
    8  *
    9  * Copyright (c) 1998, 1999 Justin T. Gibbs.
   10  * All rights reserved.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions, and the following disclaimer,
   17  *    without modification, immediately at the beginning of the file.
   18  * 2. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   25  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/10.4/sys/dev/buslogic/bt.c 315813 2017-03-23 06:41:13Z mav $");
   36 
   37  /*
   38   * Special thanks to Leonard N. Zubkoff for writing such a complete and
   39   * well documented Mylex/BusLogic MultiMaster driver for Linux.  Support
   40   * in this driver for the wide range of MultiMaster controllers and
   41   * firmware revisions, with their otherwise undocumented quirks, would not
   42   * have been possible without his efforts.
   43   */
   44 
   45 #include <sys/param.h>
   46 #include <sys/conf.h>
   47 #include <sys/systm.h> 
   48 #include <sys/malloc.h>
   49 #include <sys/kernel.h>
   50 #include <sys/lock.h>
   51 #include <sys/module.h>
   52 #include <sys/mutex.h>
   53 #include <sys/sysctl.h>
   54 #include <sys/bus.h>
   55  
   56 #include <machine/bus.h>
   57 #include <sys/rman.h>
   58 
   59 #include <cam/cam.h>
   60 #include <cam/cam_ccb.h>
   61 #include <cam/cam_sim.h>
   62 #include <cam/cam_xpt_sim.h>
   63 #include <cam/cam_debug.h>
   64 
   65 #include <cam/scsi/scsi_message.h>
   66 
   67 #include <vm/vm.h>
   68 #include <vm/pmap.h>
   69  
   70 #include <dev/buslogic/btreg.h>
   71 
   72 /* MailBox Management functions */
   73 static __inline void    btnextinbox(struct bt_softc *bt);
   74 static __inline void    btnextoutbox(struct bt_softc *bt);
   75 
   76 static __inline void
   77 btnextinbox(struct bt_softc *bt)
   78 {
   79         if (bt->cur_inbox == bt->last_inbox)
   80                 bt->cur_inbox = bt->in_boxes;
   81         else
   82                 bt->cur_inbox++;
   83 }
   84 
   85 static __inline void
   86 btnextoutbox(struct bt_softc *bt)
   87 {
   88         if (bt->cur_outbox == bt->last_outbox)
   89                 bt->cur_outbox = bt->out_boxes;
   90         else
   91                 bt->cur_outbox++;
   92 }
   93 
   94 /* CCB Mangement functions */
   95 static __inline u_int32_t               btccbvtop(struct bt_softc *bt,
   96                                                   struct bt_ccb *bccb);
   97 static __inline struct bt_ccb*          btccbptov(struct bt_softc *bt,
   98                                                   u_int32_t ccb_addr);
   99 static __inline u_int32_t               btsensepaddr(struct bt_softc *bt,
  100                                                      struct bt_ccb *bccb);
  101 static __inline struct scsi_sense_data* btsensevaddr(struct bt_softc *bt,
  102                                                      struct bt_ccb *bccb);
  103 
  104 static __inline u_int32_t
  105 btccbvtop(struct bt_softc *bt, struct bt_ccb *bccb)
  106 {
  107         return (bt->bt_ccb_physbase
  108               + (u_int32_t)((caddr_t)bccb - (caddr_t)bt->bt_ccb_array));
  109 }
  110 
  111 static __inline struct bt_ccb *
  112 btccbptov(struct bt_softc *bt, u_int32_t ccb_addr)
  113 {
  114         return (bt->bt_ccb_array +
  115                 ((struct bt_ccb*)(uintptr_t)ccb_addr - (struct bt_ccb*)(uintptr_t)bt->bt_ccb_physbase));
  116 }
  117 
  118 static __inline u_int32_t
  119 btsensepaddr(struct bt_softc *bt, struct bt_ccb *bccb)
  120 {
  121         u_int index;
  122 
  123         index = (u_int)(bccb - bt->bt_ccb_array);
  124         return (bt->sense_buffers_physbase
  125                 + (index * sizeof(struct scsi_sense_data)));
  126 }
  127 
  128 static __inline struct scsi_sense_data *
  129 btsensevaddr(struct bt_softc *bt, struct bt_ccb *bccb)
  130 {
  131         u_int index;
  132 
  133         index = (u_int)(bccb - bt->bt_ccb_array);
  134         return (bt->sense_buffers + index);
  135 }
  136 
  137 static __inline struct bt_ccb*  btgetccb(struct bt_softc *bt);
  138 static __inline void            btfreeccb(struct bt_softc *bt,
  139                                           struct bt_ccb *bccb);
  140 static void             btallocccbs(struct bt_softc *bt);
  141 static bus_dmamap_callback_t btexecuteccb;
  142 static void             btdone(struct bt_softc *bt, struct bt_ccb *bccb,
  143                                bt_mbi_comp_code_t comp_code);
  144 static void             bt_intr_locked(struct bt_softc *bt);
  145 
  146 /* Host adapter command functions */
  147 static int      btreset(struct bt_softc* bt, int hard_reset);
  148 
  149 /* Initialization functions */
  150 static int                      btinitmboxes(struct bt_softc *bt);
  151 static bus_dmamap_callback_t    btmapmboxes;
  152 static bus_dmamap_callback_t    btmapccbs;
  153 static bus_dmamap_callback_t    btmapsgs;
  154 
  155 /* Transfer Negotiation Functions */
  156 static void btfetchtransinfo(struct bt_softc *bt,
  157                              struct ccb_trans_settings *cts);
  158 
  159 /* CAM SIM entry points */
  160 #define ccb_bccb_ptr spriv_ptr0
  161 #define ccb_bt_ptr spriv_ptr1
  162 static void     btaction(struct cam_sim *sim, union ccb *ccb);
  163 static void     btpoll(struct cam_sim *sim);
  164 
  165 /* Our timeout handler */
  166 static void     bttimeout(void *arg);
  167 
  168 /*
  169  * XXX
  170  * Do our own re-probe protection until a configuration
  171  * manager can do it for us.  This ensures that we don't
  172  * reprobe a card already found by the EISA or PCI probes.
  173  */
  174 struct bt_isa_port bt_isa_ports[] =
  175 {
  176         { 0x130, 0, 4 },
  177         { 0x134, 0, 5 },
  178         { 0x230, 0, 2 },
  179         { 0x234, 0, 3 },
  180         { 0x330, 0, 0 },
  181         { 0x334, 0, 1 }
  182 };
  183 
  184 /*
  185  * I/O ports listed in the order enumerated by the
  186  * card for certain op codes.
  187  */
  188 u_int16_t bt_board_ports[] =
  189 {
  190         0x330,
  191         0x334,
  192         0x230,
  193         0x234,
  194         0x130,
  195         0x134
  196 };
  197 
  198 /* Exported functions */
  199 void
  200 bt_init_softc(device_t dev, struct resource *port,
  201               struct resource *irq, struct resource *drq)
  202 {
  203         struct bt_softc *bt = device_get_softc(dev);
  204 
  205         SLIST_INIT(&bt->free_bt_ccbs);
  206         LIST_INIT(&bt->pending_ccbs);
  207         SLIST_INIT(&bt->sg_maps);
  208         bt->dev = dev;
  209         bt->port = port;
  210         bt->irq = irq;
  211         bt->drq = drq;
  212         mtx_init(&bt->lock, "bt", NULL, MTX_DEF);
  213 }
  214 
  215 void
  216 bt_free_softc(device_t dev)
  217 {
  218         struct bt_softc *bt = device_get_softc(dev);
  219 
  220         switch (bt->init_level) {
  221         default:
  222         case 11:
  223                 bus_dmamap_unload(bt->sense_dmat, bt->sense_dmamap);
  224         case 10:
  225                 bus_dmamem_free(bt->sense_dmat, bt->sense_buffers,
  226                                 bt->sense_dmamap);
  227         case 9:
  228                 bus_dma_tag_destroy(bt->sense_dmat);
  229         case 8:
  230         {
  231                 struct sg_map_node *sg_map;
  232 
  233                 while ((sg_map = SLIST_FIRST(&bt->sg_maps))!= NULL) {
  234                         SLIST_REMOVE_HEAD(&bt->sg_maps, links);
  235                         bus_dmamap_unload(bt->sg_dmat,
  236                                           sg_map->sg_dmamap);
  237                         bus_dmamem_free(bt->sg_dmat, sg_map->sg_vaddr,
  238                                         sg_map->sg_dmamap);
  239                         free(sg_map, M_DEVBUF);
  240                 }
  241                 bus_dma_tag_destroy(bt->sg_dmat);
  242         }
  243         case 7:
  244                 bus_dmamap_unload(bt->ccb_dmat, bt->ccb_dmamap);
  245                 /* FALLTHROUGH */
  246         case 6:
  247                 bus_dmamem_free(bt->ccb_dmat, bt->bt_ccb_array,
  248                                 bt->ccb_dmamap);
  249                 bus_dmamap_destroy(bt->ccb_dmat, bt->ccb_dmamap);
  250                 /* FALLTHROUGH */
  251         case 5:
  252                 bus_dma_tag_destroy(bt->ccb_dmat);
  253                 /* FALLTHROUGH */
  254         case 4:
  255                 bus_dmamap_unload(bt->mailbox_dmat, bt->mailbox_dmamap);
  256                 /* FALLTHROUGH */
  257         case 3:
  258                 bus_dmamem_free(bt->mailbox_dmat, bt->in_boxes,
  259                                 bt->mailbox_dmamap);
  260                 bus_dmamap_destroy(bt->mailbox_dmat, bt->mailbox_dmamap);
  261                 /* FALLTHROUGH */
  262         case 2:
  263                 bus_dma_tag_destroy(bt->buffer_dmat);
  264                 /* FALLTHROUGH */
  265         case 1:
  266                 bus_dma_tag_destroy(bt->mailbox_dmat);
  267                 /* FALLTHROUGH */
  268         case 0:
  269                 break;
  270         }
  271         mtx_destroy(&bt->lock);
  272 }
  273 
  274 int
  275 bt_port_probe(device_t dev, struct bt_probe_info *info)
  276 {
  277         struct bt_softc *bt = device_get_softc(dev);
  278         config_data_t config_data;
  279         int error;
  280 
  281         /* See if there is really a card present */
  282         if (bt_probe(dev) || bt_fetch_adapter_info(dev))
  283                 return(1);
  284 
  285         /*
  286          * Determine our IRQ, and DMA settings and
  287          * export them to the configuration system.
  288          */
  289         mtx_lock(&bt->lock);
  290         error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  291                        (u_int8_t*)&config_data, sizeof(config_data),
  292                        DEFAULT_CMD_TIMEOUT);
  293         mtx_unlock(&bt->lock);
  294         if (error != 0) {
  295                 printf("bt_port_probe: Could not determine IRQ or DMA "
  296                        "settings for adapter.\n");
  297                 return (1);
  298         }
  299 
  300         if (bt->model[0] == '5') {
  301                 /* DMA settings only make sense for ISA cards */
  302                 switch (config_data.dma_chan) {
  303                 case DMA_CHAN_5:
  304                         info->drq = 5;
  305                         break;
  306                 case DMA_CHAN_6:
  307                         info->drq = 6;
  308                         break;
  309                 case DMA_CHAN_7:
  310                         info->drq = 7;
  311                         break;
  312                 default:
  313                         printf("bt_port_probe: Invalid DMA setting "
  314                                "detected for adapter.\n");
  315                         return (1);
  316                 }
  317         } else {
  318                 /* VL/EISA/PCI DMA */
  319                 info->drq = -1;
  320         }
  321         switch (config_data.irq) {
  322         case IRQ_9:
  323         case IRQ_10:
  324         case IRQ_11:
  325         case IRQ_12:
  326         case IRQ_14:
  327         case IRQ_15:
  328                 info->irq = ffs(config_data.irq) + 8;
  329                 break;
  330         default:
  331                 printf("bt_port_probe: Invalid IRQ setting %x"
  332                        "detected for adapter.\n", config_data.irq);
  333                 return (1);
  334         }
  335         return (0);
  336 }
  337 
  338 /*
  339  * Probe the adapter and verify that the card is a BusLogic.
  340  */
  341 int
  342 bt_probe(device_t dev)
  343 {
  344         struct bt_softc *bt = device_get_softc(dev);
  345         esetup_info_data_t esetup_info;
  346         u_int    status;
  347         u_int    intstat;
  348         u_int    geometry;
  349         int      error;
  350         u_int8_t param;
  351 
  352         /*
  353          * See if the three I/O ports look reasonable.
  354          * Touch the minimal number of registers in the
  355          * failure case.
  356          */
  357         status = bt_inb(bt, STATUS_REG);
  358         if ((status == 0)
  359          || (status & (DIAG_ACTIVE|CMD_REG_BUSY|
  360                        STATUS_REG_RSVD|CMD_INVALID)) != 0) {
  361                 if (bootverbose)
  362                         device_printf(dev, "Failed Status Reg Test - %x\n",
  363                                status);
  364                 return (ENXIO);
  365         }
  366 
  367         intstat = bt_inb(bt, INTSTAT_REG);
  368         if ((intstat & INTSTAT_REG_RSVD) != 0) {
  369                 device_printf(dev, "Failed Intstat Reg Test\n");
  370                 return (ENXIO);
  371         }
  372 
  373         geometry = bt_inb(bt, GEOMETRY_REG);
  374         if (geometry == 0xFF) {
  375                 if (bootverbose)
  376                         device_printf(dev, "Failed Geometry Reg Test\n");
  377                 return (ENXIO);
  378         }
  379 
  380         /*
  381          * Looking good so far.  Final test is to reset the
  382          * adapter and attempt to fetch the extended setup
  383          * information.  This should filter out all 1542 cards.
  384          */
  385         mtx_lock(&bt->lock);
  386         if ((error = btreset(bt, /*hard_reset*/TRUE)) != 0) {
  387                 mtx_unlock(&bt->lock);
  388                 if (bootverbose)
  389                         device_printf(dev, "Failed Reset\n");
  390                 return (ENXIO);
  391         }
  392         
  393         param = sizeof(esetup_info);
  394         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &param, /*parmlen*/1,
  395                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
  396                        DEFAULT_CMD_TIMEOUT);
  397         mtx_unlock(&bt->lock);
  398         if (error != 0) {
  399                 return (ENXIO);
  400         }
  401 
  402         return (0);
  403 }
  404 
  405 /*
  406  * Pull the boards setup information and record it in our softc.
  407  */
  408 int
  409 bt_fetch_adapter_info(device_t dev)
  410 {
  411         struct bt_softc *bt = device_get_softc(dev);
  412         board_id_data_t board_id;
  413         esetup_info_data_t esetup_info;
  414         config_data_t config_data;
  415         int      error;
  416         u_int8_t length_param;
  417 
  418         /* First record the firmware version */
  419         mtx_lock(&bt->lock);
  420         error = bt_cmd(bt, BOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
  421                        (u_int8_t*)&board_id, sizeof(board_id),
  422                        DEFAULT_CMD_TIMEOUT);
  423         if (error != 0) {
  424                 mtx_unlock(&bt->lock);
  425                 device_printf(dev, "bt_fetch_adapter_info - Failed Get Board Info\n");
  426                 return (error);
  427         }
  428         bt->firmware_ver[0] = board_id.firmware_rev_major;
  429         bt->firmware_ver[1] = '.';
  430         bt->firmware_ver[2] = board_id.firmware_rev_minor;
  431         bt->firmware_ver[3] = '\0';
  432                 
  433         /*
  434          * Depending on the firmware major and minor version,
  435          * we may be able to fetch additional minor version info.
  436          */
  437         if (bt->firmware_ver[0] > '') {
  438                 
  439                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_3DIG, NULL, /*parmlen*/0,
  440                                (u_int8_t*)&bt->firmware_ver[3], 1,
  441                                DEFAULT_CMD_TIMEOUT);
  442                 if (error != 0) {
  443                         mtx_unlock(&bt->lock);
  444                         device_printf(dev,
  445                                       "bt_fetch_adapter_info - Failed Get "
  446                                       "Firmware 3rd Digit\n");
  447                         return (error);
  448                 }
  449                 if (bt->firmware_ver[3] == ' ')
  450                         bt->firmware_ver[3] = '\0';
  451                 bt->firmware_ver[4] = '\0';
  452         }
  453 
  454         if (strcmp(bt->firmware_ver, "3.3") >= 0) {
  455 
  456                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_4DIG, NULL, /*parmlen*/0,
  457                                (u_int8_t*)&bt->firmware_ver[4], 1,
  458                                DEFAULT_CMD_TIMEOUT);
  459                 if (error != 0) {
  460                         mtx_unlock(&bt->lock);
  461                         device_printf(dev,
  462                                       "bt_fetch_adapter_info - Failed Get "
  463                                       "Firmware 4th Digit\n");
  464                         return (error);
  465                 }
  466                 if (bt->firmware_ver[4] == ' ')
  467                         bt->firmware_ver[4] = '\0';
  468                 bt->firmware_ver[5] = '\0';
  469         }
  470 
  471         /*
  472          * Some boards do not handle the "recently documented"
  473          * Inquire Board Model Number command correctly or do not give
  474          * exact information.  Use the Firmware and Extended Setup
  475          * information in these cases to come up with the right answer.
  476          * The major firmware revision number indicates:
  477          *
  478          *      5.xx    BusLogic "W" Series Host Adapters:
  479          *              BT-948/958/958D
  480          *      4.xx    BusLogic "C" Series Host Adapters:
  481          *              BT-946C/956C/956CD/747C/757C/757CD/445C/545C/540CF
  482          *      3.xx    BusLogic "S" Series Host Adapters:
  483          *              BT-747S/747D/757S/757D/445S/545S/542D
  484          *              BT-542B/742A (revision H)
  485          *      2.xx    BusLogic "A" Series Host Adapters:
  486          *              BT-542B/742A (revision G and below)
  487          *      0.xx    AMI FastDisk VLB/EISA BusLogic Clone Host Adapter
  488          */
  489         length_param = sizeof(esetup_info);
  490         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &length_param, /*parmlen*/1,
  491                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
  492                        DEFAULT_CMD_TIMEOUT);
  493         if (error != 0) {
  494                 mtx_unlock(&bt->lock);
  495                 return (error);
  496         }
  497         
  498         bt->bios_addr = esetup_info.bios_addr << 12;
  499 
  500         bt->mailbox_addrlimit = BUS_SPACE_MAXADDR;
  501         if (esetup_info.bus_type == 'A'
  502          && bt->firmware_ver[0] == '2') {
  503                 snprintf(bt->model, sizeof(bt->model), "542B");
  504         } else if (esetup_info.bus_type == 'E'
  505                 && bt->firmware_ver[0] == '2') {
  506 
  507                 /*
  508                  * The 742A seems to object if its mailboxes are
  509                  * allocated above the 16MB mark.
  510                  */
  511                 bt->mailbox_addrlimit = BUS_SPACE_MAXADDR_24BIT;
  512                 snprintf(bt->model, sizeof(bt->model), "742A");
  513         } else if (esetup_info.bus_type == 'E'
  514                 && bt->firmware_ver[0] == '') {
  515                 /* AMI FastDisk EISA Series 441 0.x */
  516                 snprintf(bt->model, sizeof(bt->model), "747A");
  517         } else {
  518                 ha_model_data_t model_data;
  519                 int i;
  520 
  521                 length_param = sizeof(model_data);
  522                 error = bt_cmd(bt, BOP_INQUIRE_MODEL, &length_param, 1,
  523                                (u_int8_t*)&model_data, sizeof(model_data),
  524                                DEFAULT_CMD_TIMEOUT);
  525                 if (error != 0) {
  526                         mtx_unlock(&bt->lock);
  527                         device_printf(dev,
  528                                       "bt_fetch_adapter_info - Failed Inquire "
  529                                       "Model Number\n");
  530                         return (error);
  531                 }
  532                 for (i = 0; i < sizeof(model_data.ascii_model); i++) {
  533                         bt->model[i] = model_data.ascii_model[i];
  534                         if (bt->model[i] == ' ')
  535                                 break;
  536                 }
  537                 bt->model[i] = '\0';
  538         }
  539 
  540         bt->level_trigger_ints = esetup_info.level_trigger_ints ? 1 : 0;
  541 
  542         /* SG element limits */
  543         bt->max_sg = esetup_info.max_sg;
  544 
  545         /* Set feature flags */
  546         bt->wide_bus = esetup_info.wide_bus;
  547         bt->diff_bus = esetup_info.diff_bus;
  548         bt->ultra_scsi = esetup_info.ultra_scsi;
  549 
  550         if ((bt->firmware_ver[0] == '5')
  551          || (bt->firmware_ver[0] == '4' && bt->wide_bus))
  552                 bt->extended_lun = TRUE;
  553 
  554         bt->strict_rr = (strcmp(bt->firmware_ver, "3.31") >= 0);
  555 
  556         bt->extended_trans =
  557             ((bt_inb(bt, GEOMETRY_REG) & EXTENDED_TRANSLATION) != 0);
  558 
  559         /*
  560          * Determine max CCB count and whether tagged queuing is
  561          * available based on controller type. Tagged queuing
  562          * only works on 'W' series adapters, 'C' series adapters
  563          * with firmware of rev 4.42 and higher, and 'S' series
  564          * adapters with firmware of rev 3.35 and higher.  The
  565          * maximum CCB counts are as follows:
  566          *
  567          *      192     BT-948/958/958D
  568          *      100     BT-946C/956C/956CD/747C/757C/757CD/445C
  569          *      50      BT-545C/540CF
  570          *      30      BT-747S/747D/757S/757D/445S/545S/542D/542B/742A
  571          */
  572         if (bt->firmware_ver[0] == '5') {
  573                 bt->max_ccbs = 192;
  574                 bt->tag_capable = TRUE;
  575         } else if (bt->firmware_ver[0] == '4') {
  576                 if (bt->model[0] == '5')
  577                         bt->max_ccbs = 50;
  578                 else
  579                         bt->max_ccbs = 100;
  580                 bt->tag_capable = (strcmp(bt->firmware_ver, "4.22") >= 0);
  581         } else {
  582                 bt->max_ccbs = 30;
  583                 if (bt->firmware_ver[0] == '3'
  584                  && (strcmp(bt->firmware_ver, "3.35") >= 0))
  585                         bt->tag_capable = TRUE;
  586                 else
  587                         bt->tag_capable = FALSE;
  588         }
  589 
  590         if (bt->tag_capable != FALSE)
  591                 bt->tags_permitted = ALL_TARGETS;
  592 
  593         /* Determine Sync/Wide/Disc settings */
  594         if (bt->firmware_ver[0] >= '4') {
  595                 auto_scsi_data_t auto_scsi_data;
  596                 fetch_lram_params_t fetch_lram_params;
  597                 int error;
  598                 
  599                 /*
  600                  * These settings are stored in the
  601                  * AutoSCSI data in LRAM of 'W' and 'C'
  602                  * adapters.
  603                  */
  604                 fetch_lram_params.offset = AUTO_SCSI_BYTE_OFFSET;
  605                 fetch_lram_params.response_len = sizeof(auto_scsi_data);
  606                 error = bt_cmd(bt, BOP_FETCH_LRAM,
  607                                (u_int8_t*)&fetch_lram_params,
  608                                sizeof(fetch_lram_params),
  609                                (u_int8_t*)&auto_scsi_data,
  610                                sizeof(auto_scsi_data), DEFAULT_CMD_TIMEOUT);
  611 
  612                 if (error != 0) {
  613                         mtx_unlock(&bt->lock);
  614                         device_printf(dev,
  615                                       "bt_fetch_adapter_info - Failed "
  616                                       "Get Auto SCSI Info\n");
  617                         return (error);
  618                 }
  619 
  620                 bt->disc_permitted = auto_scsi_data.low_disc_permitted
  621                                    | (auto_scsi_data.high_disc_permitted << 8);
  622                 bt->sync_permitted = auto_scsi_data.low_sync_permitted
  623                                    | (auto_scsi_data.high_sync_permitted << 8);
  624                 bt->fast_permitted = auto_scsi_data.low_fast_permitted
  625                                    | (auto_scsi_data.high_fast_permitted << 8);
  626                 bt->ultra_permitted = auto_scsi_data.low_ultra_permitted
  627                                    | (auto_scsi_data.high_ultra_permitted << 8);
  628                 bt->wide_permitted = auto_scsi_data.low_wide_permitted
  629                                    | (auto_scsi_data.high_wide_permitted << 8);
  630 
  631                 if (bt->ultra_scsi == FALSE)
  632                         bt->ultra_permitted = 0;
  633 
  634                 if (bt->wide_bus == FALSE)
  635                         bt->wide_permitted = 0;
  636         } else {
  637                 /*
  638                  * 'S' and 'A' series have this information in the setup
  639                  * information structure.
  640                  */
  641                 setup_data_t    setup_info;
  642 
  643                 length_param = sizeof(setup_info);
  644                 error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &length_param,
  645                                /*paramlen*/1, (u_int8_t*)&setup_info,
  646                                sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
  647 
  648                 if (error != 0) {
  649                         mtx_unlock(&bt->lock);
  650                         device_printf(dev,
  651                                       "bt_fetch_adapter_info - Failed "
  652                                       "Get Setup Info\n");
  653                         return (error);
  654                 }
  655 
  656                 if (setup_info.initiate_sync != 0) {
  657                         bt->sync_permitted = ALL_TARGETS;
  658 
  659                         if (bt->model[0] == '7') {
  660                                 if (esetup_info.sync_neg10MB != 0)
  661                                         bt->fast_permitted = ALL_TARGETS;
  662                                 if (strcmp(bt->model, "757") == 0)
  663                                         bt->wide_permitted = ALL_TARGETS;
  664                         }
  665                 }
  666                 bt->disc_permitted = ALL_TARGETS;
  667         }
  668 
  669         /* We need as many mailboxes as we can have ccbs */
  670         bt->num_boxes = bt->max_ccbs;
  671 
  672         /* Determine our SCSI ID */
  673         
  674         error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  675                        (u_int8_t*)&config_data, sizeof(config_data),
  676                        DEFAULT_CMD_TIMEOUT);
  677         mtx_unlock(&bt->lock);
  678         if (error != 0) {
  679                 device_printf(dev,
  680                               "bt_fetch_adapter_info - Failed Get Config\n");
  681                 return (error);
  682         }
  683         bt->scsi_id = config_data.scsi_id;
  684 
  685         return (0);
  686 }
  687 
  688 /*
  689  * Start the board, ready for normal operation
  690  */
  691 int
  692 bt_init(device_t dev)
  693 {
  694         struct bt_softc *bt = device_get_softc(dev);
  695 
  696         /* Announce the Adapter */
  697         device_printf(dev, "BT-%s FW Rev. %s ", bt->model, bt->firmware_ver);
  698 
  699         if (bt->ultra_scsi != 0)
  700                 printf("Ultra ");
  701 
  702         if (bt->wide_bus != 0)
  703                 printf("Wide ");
  704         else
  705                 printf("Narrow ");
  706 
  707         if (bt->diff_bus != 0)
  708                 printf("Diff ");
  709 
  710         printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", bt->scsi_id,
  711                bt->max_ccbs);
  712 
  713         /*
  714          * Create our DMA tags.  These tags define the kinds of device
  715          * accessible memory allocations and memory mappings we will 
  716          * need to perform during normal operation.
  717          *
  718          * Unless we need to further restrict the allocation, we rely
  719          * on the restrictions of the parent dmat, hence the common
  720          * use of MAXADDR and MAXSIZE.
  721          */
  722 
  723         /* DMA tag for mapping buffers into device visible space. */
  724         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  725                                 /* alignment    */ 1,
  726                                 /* boundary     */ 0,
  727                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  728                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  729                                 /* filter       */ NULL,
  730                                 /* filterarg    */ NULL,
  731                                 /* maxsize      */ DFLTPHYS,
  732                                 /* nsegments    */ BT_NSEG,
  733                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  734                                 /* flags        */ BUS_DMA_ALLOCNOW,
  735                                 /* lockfunc     */ busdma_lock_mutex,
  736                                 /* lockarg      */ &bt->lock,
  737                                 &bt->buffer_dmat) != 0) {
  738                 goto error_exit;
  739         }
  740 
  741         bt->init_level++;
  742         /* DMA tag for our mailboxes */
  743         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  744                                 /* alignment    */ 1,
  745                                 /* boundary     */ 0,
  746                                 /* lowaddr      */ bt->mailbox_addrlimit,
  747                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  748                                 /* filter       */ NULL,
  749                                 /* filterarg    */ NULL,
  750                                 /* maxsize      */ bt->num_boxes *
  751                                                    (sizeof(bt_mbox_in_t) +
  752                                                     sizeof(bt_mbox_out_t)),
  753                                 /* nsegments    */ 1,
  754                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  755                                 /* flags        */ 0,
  756                                 /* lockfunc     */ NULL,
  757                                 /* lockarg      */ NULL,
  758                                 &bt->mailbox_dmat) != 0) {
  759                 goto error_exit;
  760         }
  761 
  762         bt->init_level++;
  763 
  764         /* Allocation for our mailboxes */
  765         if (bus_dmamem_alloc(bt->mailbox_dmat, (void **)&bt->out_boxes,
  766                              BUS_DMA_NOWAIT, &bt->mailbox_dmamap) != 0) {
  767                 goto error_exit;
  768         }
  769 
  770         bt->init_level++;
  771 
  772         /* And permanently map them */
  773         bus_dmamap_load(bt->mailbox_dmat, bt->mailbox_dmamap,
  774                         bt->out_boxes,
  775                         bt->num_boxes * (sizeof(bt_mbox_in_t)
  776                                        + sizeof(bt_mbox_out_t)),
  777                         btmapmboxes, bt, /*flags*/0);
  778 
  779         bt->init_level++;
  780 
  781         bt->in_boxes = (bt_mbox_in_t *)&bt->out_boxes[bt->num_boxes];
  782 
  783         mtx_lock(&bt->lock);
  784         btinitmboxes(bt);
  785         mtx_unlock(&bt->lock);
  786 
  787         /* DMA tag for our ccb structures */
  788         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  789                                 /* alignment    */ 1,
  790                                 /* boundary     */ 0,
  791                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  792                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  793                                 /* filter       */ NULL,
  794                                 /* filterarg    */ NULL,
  795                                 /* maxsize      */ bt->max_ccbs *
  796                                                    sizeof(struct bt_ccb),
  797                                 /* nsegments    */ 1,
  798                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  799                                 /* flags        */ 0,
  800                                 /* lockfunc     */ NULL,
  801                                 /* lockarg      */ NULL,
  802                                 &bt->ccb_dmat) != 0) {
  803                 goto error_exit;
  804         }
  805 
  806         bt->init_level++;
  807 
  808         /* Allocation for our ccbs */
  809         if (bus_dmamem_alloc(bt->ccb_dmat, (void **)&bt->bt_ccb_array,
  810                              BUS_DMA_NOWAIT, &bt->ccb_dmamap) != 0) {
  811                 goto error_exit;
  812         }
  813 
  814         bt->init_level++;
  815 
  816         /* And permanently map them */
  817         bus_dmamap_load(bt->ccb_dmat, bt->ccb_dmamap,
  818                         bt->bt_ccb_array,
  819                         bt->max_ccbs * sizeof(struct bt_ccb),
  820                         btmapccbs, bt, /*flags*/0);
  821 
  822         bt->init_level++;
  823 
  824         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
  825         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  826                                 /* alignment    */ 1,
  827                                 /* boundary     */ 0,
  828                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  829                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  830                                 /* filter       */ NULL,
  831                                 /* filterarg    */ NULL,
  832                                 /* maxsize      */ PAGE_SIZE,
  833                                 /* nsegments    */ 1,
  834                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  835                                 /* flags        */ 0,
  836                                 /* lockfunc     */ NULL,
  837                                 /* lockarg      */ NULL,
  838                                 &bt->sg_dmat) != 0) {
  839                 goto error_exit;
  840         }
  841 
  842         bt->init_level++;
  843 
  844         /* Perform initial CCB allocation */
  845         bzero(bt->bt_ccb_array, bt->max_ccbs * sizeof(struct bt_ccb));
  846         btallocccbs(bt);
  847 
  848         if (bt->num_ccbs == 0) {
  849                 device_printf(dev,
  850                               "bt_init - Unable to allocate initial ccbs\n");
  851                 goto error_exit;
  852         }
  853 
  854         /*
  855          * Note that we are going and return (to attach)
  856          */
  857         return 0;
  858 
  859 error_exit:
  860 
  861         return (ENXIO);
  862 }
  863 
  864 int
  865 bt_attach(device_t dev)
  866 {
  867         struct bt_softc *bt = device_get_softc(dev);
  868         int tagged_dev_openings;
  869         struct cam_devq *devq;
  870         int error;
  871 
  872         /*
  873          * We reserve 1 ccb for error recovery, so don't
  874          * tell the XPT about it.
  875          */
  876         if (bt->tag_capable != 0)
  877                 tagged_dev_openings = bt->max_ccbs - 1;
  878         else
  879                 tagged_dev_openings = 0;
  880 
  881         /*
  882          * Create the device queue for our SIM.
  883          */
  884         devq = cam_simq_alloc(bt->max_ccbs - 1);
  885         if (devq == NULL)
  886                 return (ENOMEM);
  887 
  888         /*
  889          * Construct our SIM entry
  890          */
  891         bt->sim = cam_sim_alloc(btaction, btpoll, "bt", bt,
  892             device_get_unit(bt->dev), &bt->lock, 2, tagged_dev_openings, devq);
  893         if (bt->sim == NULL) {
  894                 cam_simq_free(devq);
  895                 return (ENOMEM);
  896         }
  897 
  898         mtx_lock(&bt->lock);
  899         if (xpt_bus_register(bt->sim, dev, 0) != CAM_SUCCESS) {
  900                 cam_sim_free(bt->sim, /*free_devq*/TRUE);
  901                 mtx_unlock(&bt->lock);
  902                 return (ENXIO);
  903         }
  904         
  905         if (xpt_create_path(&bt->path, /*periph*/NULL,
  906                             cam_sim_path(bt->sim), CAM_TARGET_WILDCARD,
  907                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  908                 xpt_bus_deregister(cam_sim_path(bt->sim));
  909                 cam_sim_free(bt->sim, /*free_devq*/TRUE);
  910                 mtx_unlock(&bt->lock);
  911                 return (ENXIO);
  912         }
  913         mtx_unlock(&bt->lock);
  914                 
  915         /*
  916          * Setup interrupt.
  917          */
  918         error = bus_setup_intr(dev, bt->irq, INTR_TYPE_CAM | INTR_ENTROPY |
  919             INTR_MPSAFE, NULL, bt_intr, bt, &bt->ih);
  920         if (error) {
  921                 device_printf(dev, "bus_setup_intr() failed: %d\n", error);
  922                 return (error);
  923         }
  924 
  925         return (0);
  926 }
  927 
  928 int
  929 bt_check_probed_iop(u_int ioport)
  930 {
  931         u_int i;
  932 
  933         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
  934                 if (bt_isa_ports[i].addr == ioport) {
  935                         if (bt_isa_ports[i].probed != 0)
  936                                 return (1);
  937                         else {
  938                                 return (0);
  939                         }
  940                 }
  941         }
  942         return (1);
  943 }
  944 
  945 void
  946 bt_mark_probed_bio(isa_compat_io_t port)
  947 {
  948         if (port < BIO_DISABLED)
  949                 bt_mark_probed_iop(bt_board_ports[port]);
  950 }
  951 
  952 void
  953 bt_mark_probed_iop(u_int ioport)
  954 {
  955         u_int i;
  956 
  957         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
  958                 if (ioport == bt_isa_ports[i].addr) {
  959                         bt_isa_ports[i].probed = 1;
  960                         break;
  961                 }
  962         }
  963 }
  964 
  965 void
  966 bt_find_probe_range(int ioport, int *port_index, int *max_port_index)
  967 {
  968         if (ioport > 0) {
  969                 int i;
  970 
  971                 for (i = 0;i < BT_NUM_ISAPORTS; i++)
  972                         if (ioport <= bt_isa_ports[i].addr)
  973                                 break;
  974                 if ((i >= BT_NUM_ISAPORTS)
  975                  || (ioport != bt_isa_ports[i].addr)) {
  976                         printf(
  977 "bt_find_probe_range: Invalid baseport of 0x%x specified.\n"
  978 "bt_find_probe_range: Nearest valid baseport is 0x%x.\n"
  979 "bt_find_probe_range: Failing probe.\n",
  980                                ioport,
  981                                (i < BT_NUM_ISAPORTS)
  982                                     ? bt_isa_ports[i].addr
  983                                     : bt_isa_ports[BT_NUM_ISAPORTS - 1].addr);
  984                         *port_index = *max_port_index = -1;
  985                         return;
  986                 }
  987                 *port_index = *max_port_index = bt_isa_ports[i].bio;
  988         } else {
  989                 *port_index = 0;
  990                 *max_port_index = BT_NUM_ISAPORTS - 1;
  991         }
  992 }
  993 
  994 int
  995 bt_iop_from_bio(isa_compat_io_t bio_index)
  996 {
  997         if (bio_index < BT_NUM_ISAPORTS)
  998                 return (bt_board_ports[bio_index]);
  999         return (-1);
 1000 }
 1001 
 1002 
 1003 static void
 1004 btallocccbs(struct bt_softc *bt)
 1005 {
 1006         struct bt_ccb *next_ccb;
 1007         struct sg_map_node *sg_map;
 1008         bus_addr_t physaddr;
 1009         bt_sg_t *segs;
 1010         int newcount;
 1011         int i;
 1012 
 1013         if (bt->num_ccbs >= bt->max_ccbs)
 1014                 /* Can't allocate any more */
 1015                 return;
 1016 
 1017         next_ccb = &bt->bt_ccb_array[bt->num_ccbs];
 1018 
 1019         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
 1020 
 1021         if (sg_map == NULL)
 1022                 goto error_exit;
 1023 
 1024         /* Allocate S/G space for the next batch of CCBS */
 1025         if (bus_dmamem_alloc(bt->sg_dmat, (void **)&sg_map->sg_vaddr,
 1026                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 1027                 free(sg_map, M_DEVBUF);
 1028                 goto error_exit;
 1029         }
 1030 
 1031         SLIST_INSERT_HEAD(&bt->sg_maps, sg_map, links);
 1032 
 1033         bus_dmamap_load(bt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 1034                         PAGE_SIZE, btmapsgs, bt, /*flags*/0);
 1035         
 1036         segs = sg_map->sg_vaddr;
 1037         physaddr = sg_map->sg_physaddr;
 1038 
 1039         newcount = (PAGE_SIZE / (BT_NSEG * sizeof(bt_sg_t)));
 1040         for (i = 0; bt->num_ccbs < bt->max_ccbs && i < newcount; i++) {
 1041                 int error;
 1042 
 1043                 next_ccb->sg_list = segs;
 1044                 next_ccb->sg_list_phys = physaddr;
 1045                 next_ccb->flags = BCCB_FREE;
 1046                 callout_init_mtx(&next_ccb->timer, &bt->lock, 0);
 1047                 error = bus_dmamap_create(bt->buffer_dmat, /*flags*/0,
 1048                                           &next_ccb->dmamap);
 1049                 if (error != 0)
 1050                         break;
 1051                 SLIST_INSERT_HEAD(&bt->free_bt_ccbs, next_ccb, links);
 1052                 segs += BT_NSEG;
 1053                 physaddr += (BT_NSEG * sizeof(bt_sg_t));
 1054                 next_ccb++;
 1055                 bt->num_ccbs++;
 1056         }
 1057 
 1058         /* Reserve a CCB for error recovery */
 1059         if (bt->recovery_bccb == NULL) {
 1060                 bt->recovery_bccb = SLIST_FIRST(&bt->free_bt_ccbs);
 1061                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1062         }
 1063 
 1064         if (SLIST_FIRST(&bt->free_bt_ccbs) != NULL)
 1065                 return;
 1066 
 1067 error_exit:
 1068         device_printf(bt->dev, "Can't malloc BCCBs\n");
 1069 }
 1070 
 1071 static __inline void
 1072 btfreeccb(struct bt_softc *bt, struct bt_ccb *bccb)
 1073 {
 1074 
 1075         if (!dumping)
 1076                 mtx_assert(&bt->lock, MA_OWNED);
 1077         if ((bccb->flags & BCCB_ACTIVE) != 0)
 1078                 LIST_REMOVE(&bccb->ccb->ccb_h, sim_links.le);
 1079         if (bt->resource_shortage != 0
 1080          && (bccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
 1081                 bccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1082                 bt->resource_shortage = FALSE;
 1083         }
 1084         bccb->flags = BCCB_FREE;
 1085         SLIST_INSERT_HEAD(&bt->free_bt_ccbs, bccb, links);
 1086         bt->active_ccbs--;
 1087 }
 1088 
 1089 static __inline struct bt_ccb*
 1090 btgetccb(struct bt_softc *bt)
 1091 {
 1092         struct  bt_ccb* bccb;
 1093 
 1094         if (!dumping)
 1095                 mtx_assert(&bt->lock, MA_OWNED);
 1096         if ((bccb = SLIST_FIRST(&bt->free_bt_ccbs)) != NULL) {
 1097                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1098                 bt->active_ccbs++;
 1099         } else {
 1100                 btallocccbs(bt);
 1101                 bccb = SLIST_FIRST(&bt->free_bt_ccbs);
 1102                 if (bccb != NULL) {
 1103                         SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1104                         bt->active_ccbs++;
 1105                 }
 1106         }
 1107 
 1108         return (bccb);
 1109 }
 1110 
 1111 static void
 1112 btaction(struct cam_sim *sim, union ccb *ccb)
 1113 {
 1114         struct  bt_softc *bt;
 1115 
 1116         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("btaction\n"));
 1117         
 1118         bt = (struct bt_softc *)cam_sim_softc(sim);
 1119         mtx_assert(&bt->lock, MA_OWNED);
 1120         
 1121         switch (ccb->ccb_h.func_code) {
 1122         /* Common cases first */
 1123         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 1124         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 1125         {
 1126                 struct  bt_ccb  *bccb;
 1127                 struct  bt_hccb *hccb;
 1128 
 1129                 /*
 1130                  * get a bccb to use.
 1131                  */
 1132                 if ((bccb = btgetccb(bt)) == NULL) {
 1133 
 1134                         bt->resource_shortage = TRUE;
 1135                         xpt_freeze_simq(bt->sim, /*count*/1);
 1136                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1137                         xpt_done(ccb);
 1138                         return;
 1139                 }
 1140                 
 1141                 hccb = &bccb->hccb;
 1142 
 1143                 /*
 1144                  * So we can find the BCCB when an abort is requested
 1145                  */
 1146                 bccb->ccb = ccb;
 1147                 ccb->ccb_h.ccb_bccb_ptr = bccb;
 1148                 ccb->ccb_h.ccb_bt_ptr = bt;
 1149 
 1150                 /*
 1151                  * Put all the arguments for the xfer in the bccb
 1152                  */
 1153                 hccb->target_id = ccb->ccb_h.target_id;
 1154                 hccb->target_lun = ccb->ccb_h.target_lun;
 1155                 hccb->btstat = 0;
 1156                 hccb->sdstat = 0;
 1157 
 1158                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
 1159                         struct ccb_scsiio *csio;
 1160                         struct ccb_hdr *ccbh;
 1161                         int error;
 1162 
 1163                         csio = &ccb->csio;
 1164                         ccbh = &csio->ccb_h;
 1165                         hccb->opcode = INITIATOR_CCB_WRESID;
 1166                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
 1167                         hccb->dataout =(ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
 1168                         hccb->cmd_len = csio->cdb_len;
 1169                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
 1170                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1171                                 btfreeccb(bt, bccb);
 1172                                 xpt_done(ccb);
 1173                                 return;
 1174                         }
 1175                         hccb->sense_len = csio->sense_len;
 1176                         if ((ccbh->flags & CAM_TAG_ACTION_VALID) != 0
 1177                          && ccb->csio.tag_action != CAM_TAG_ACTION_NONE) {
 1178                                 hccb->tag_enable = TRUE;
 1179                                 hccb->tag_type = (ccb->csio.tag_action & 0x3);
 1180                         } else {
 1181                                 hccb->tag_enable = FALSE;
 1182                                 hccb->tag_type = 0;
 1183                         }
 1184                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
 1185                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
 1186                                         bcopy(csio->cdb_io.cdb_ptr,
 1187                                               hccb->scsi_cdb, hccb->cmd_len);
 1188                                 } else {
 1189                                         /* I guess I could map it in... */
 1190                                         ccbh->status = CAM_REQ_INVALID;
 1191                                         btfreeccb(bt, bccb);
 1192                                         xpt_done(ccb);
 1193                                         return;
 1194                                 }
 1195                         } else {
 1196                                 bcopy(csio->cdb_io.cdb_bytes,
 1197                                       hccb->scsi_cdb, hccb->cmd_len);
 1198                         }
 1199                         /* If need be, bounce our sense buffer */
 1200                         if (bt->sense_buffers != NULL) {
 1201                                 hccb->sense_addr = btsensepaddr(bt, bccb);
 1202                         } else {
 1203                                 hccb->sense_addr = vtophys(&csio->sense_data);
 1204                         }
 1205                         /*
 1206                          * If we have any data to send with this command,
 1207                          * map it into bus space.
 1208                          */
 1209                         error = bus_dmamap_load_ccb(
 1210                             bt->buffer_dmat,
 1211                             bccb->dmamap,
 1212                             ccb,
 1213                             btexecuteccb,
 1214                             bccb,
 1215                             /*flags*/0);
 1216                         if (error == EINPROGRESS) {
 1217                                 /*
 1218                                  * So as to maintain ordering, freeze the
 1219                                  * controller queue until our mapping is
 1220                                  * returned.
 1221                                  */
 1222                                 xpt_freeze_simq(bt->sim, 1);
 1223                                 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
 1224                         }
 1225                 } else {
 1226                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
 1227                         /* No data transfer */
 1228                         hccb->datain = TRUE;
 1229                         hccb->dataout = TRUE;
 1230                         hccb->cmd_len = 0;
 1231                         hccb->sense_len = 0;
 1232                         hccb->tag_enable = FALSE;
 1233                         hccb->tag_type = 0;
 1234                         btexecuteccb(bccb, NULL, 0, 0);
 1235                 }
 1236                 break;
 1237         }
 1238         case XPT_EN_LUN:                /* Enable LUN as a target */
 1239         case XPT_TARGET_IO:             /* Execute target I/O request */
 1240         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
 1241         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
 1242         case XPT_ABORT:                 /* Abort the specified CCB */
 1243                 /* XXX Implement */
 1244                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1245                 xpt_done(ccb);
 1246                 break;
 1247         case XPT_SET_TRAN_SETTINGS:
 1248         {
 1249                 /* XXX Implement */
 1250                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 1251                 xpt_done(ccb);
 1252                 break;
 1253         }
 1254         case XPT_GET_TRAN_SETTINGS:
 1255         /* Get default/user set transfer settings for the target */
 1256         {
 1257                 struct  ccb_trans_settings *cts;
 1258                 u_int   target_mask;
 1259 
 1260                 cts = &ccb->cts;
 1261                 target_mask = 0x01 << ccb->ccb_h.target_id;
 1262                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
 1263                         struct ccb_trans_settings_scsi *scsi =
 1264                             &cts->proto_specific.scsi;
 1265                         struct ccb_trans_settings_spi *spi =
 1266                             &cts->xport_specific.spi;
 1267                         cts->protocol = PROTO_SCSI;
 1268                         cts->protocol_version = SCSI_REV_2;
 1269                         cts->transport = XPORT_SPI;
 1270                         cts->transport_version = 2;
 1271 
 1272                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
 1273                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
 1274 
 1275                         if ((bt->disc_permitted & target_mask) != 0)
 1276                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
 1277                         if ((bt->tags_permitted & target_mask) != 0)
 1278                                 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
 1279 
 1280                         if ((bt->ultra_permitted & target_mask) != 0)
 1281                                 spi->sync_period = 12;
 1282                         else if ((bt->fast_permitted & target_mask) != 0)
 1283                                 spi->sync_period = 25;
 1284                         else if ((bt->sync_permitted & target_mask) != 0)
 1285                                 spi->sync_period = 50;
 1286                         else
 1287                                 spi->sync_period = 0;
 1288 
 1289                         if (spi->sync_period != 0)
 1290                                 spi->sync_offset = 15;
 1291 
 1292                         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
 1293                         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
 1294 
 1295                         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
 1296                         if ((bt->wide_permitted & target_mask) != 0)
 1297                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 1298                         else
 1299                                 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 1300 
 1301                         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 1302                                 scsi->valid = CTS_SCSI_VALID_TQ;
 1303                                 spi->valid |= CTS_SPI_VALID_DISC;
 1304                         } else
 1305                                 scsi->valid = 0;
 1306                 } else {
 1307                         btfetchtransinfo(bt, cts);
 1308                 }
 1309 
 1310                 ccb->ccb_h.status = CAM_REQ_CMP;
 1311                 xpt_done(ccb);
 1312                 break;
 1313         }
 1314         case XPT_CALC_GEOMETRY:
 1315         {
 1316                 struct    ccb_calc_geometry *ccg;
 1317                 u_int32_t size_mb;
 1318                 u_int32_t secs_per_cylinder;
 1319 
 1320                 ccg = &ccb->ccg;
 1321                 size_mb = ccg->volume_size
 1322                         / ((1024L * 1024L) / ccg->block_size);
 1323                 
 1324                 if (size_mb >= 1024 && (bt->extended_trans != 0)) {
 1325                         if (size_mb >= 2048) {
 1326                                 ccg->heads = 255;
 1327                                 ccg->secs_per_track = 63;
 1328                         } else {
 1329                                 ccg->heads = 128;
 1330                                 ccg->secs_per_track = 32;
 1331                         }
 1332                 } else {
 1333                         ccg->heads = 64;
 1334                         ccg->secs_per_track = 32;
 1335                 }
 1336                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 1337                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 1338                 ccb->ccb_h.status = CAM_REQ_CMP;
 1339                 xpt_done(ccb);
 1340                 break;
 1341         }
 1342         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
 1343         {
 1344                 btreset(bt, /*hardreset*/TRUE);
 1345                 ccb->ccb_h.status = CAM_REQ_CMP;
 1346                 xpt_done(ccb);
 1347                 break;
 1348         }
 1349         case XPT_TERM_IO:               /* Terminate the I/O process */
 1350                 /* XXX Implement */
 1351                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1352                 xpt_done(ccb);
 1353                 break;
 1354         case XPT_PATH_INQ:              /* Path routing inquiry */
 1355         {
 1356                 struct ccb_pathinq *cpi = &ccb->cpi;
 1357                 
 1358                 cpi->version_num = 1; /* XXX??? */
 1359                 cpi->hba_inquiry = PI_SDTR_ABLE;
 1360                 if (bt->tag_capable != 0)
 1361                         cpi->hba_inquiry |= PI_TAG_ABLE;
 1362                 if (bt->wide_bus != 0)
 1363                         cpi->hba_inquiry |= PI_WIDE_16;
 1364                 cpi->target_sprt = 0;
 1365                 cpi->hba_misc = 0;
 1366                 cpi->hba_eng_cnt = 0;
 1367                 cpi->max_target = bt->wide_bus ? 15 : 7;
 1368                 cpi->max_lun = 7;
 1369                 cpi->initiator_id = bt->scsi_id;
 1370                 cpi->bus_id = cam_sim_bus(sim);
 1371                 cpi->base_transfer_speed = 3300;
 1372                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 1373                 strlcpy(cpi->hba_vid, "BusLogic", HBA_IDLEN);
 1374                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 1375                 cpi->unit_number = cam_sim_unit(sim);
 1376                 cpi->ccb_h.status = CAM_REQ_CMP;
 1377                 cpi->transport = XPORT_SPI;
 1378                 cpi->transport_version = 2;
 1379                 cpi->protocol = PROTO_SCSI;
 1380                 cpi->protocol_version = SCSI_REV_2;
 1381                 xpt_done(ccb);
 1382                 break;
 1383         }
 1384         default:
 1385                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1386                 xpt_done(ccb);
 1387                 break;
 1388         }
 1389 }
 1390 
 1391 static void
 1392 btexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1393 {
 1394         struct   bt_ccb *bccb;
 1395         union    ccb *ccb;
 1396         struct   bt_softc *bt;
 1397 
 1398         bccb = (struct bt_ccb *)arg;
 1399         ccb = bccb->ccb;
 1400         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
 1401 
 1402         if (error != 0) {
 1403                 if (error != EFBIG)
 1404                         device_printf(bt->dev,
 1405                                       "Unexepected error 0x%x returned from "
 1406                                       "bus_dmamap_load\n", error);
 1407                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 1408                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1409                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 1410                 }
 1411                 btfreeccb(bt, bccb);
 1412                 xpt_done(ccb);
 1413                 return;
 1414         }
 1415                 
 1416         if (nseg != 0) {
 1417                 bt_sg_t *sg;
 1418                 bus_dma_segment_t *end_seg;
 1419                 bus_dmasync_op_t op;
 1420 
 1421                 end_seg = dm_segs + nseg;
 1422 
 1423                 /* Copy the segments into our SG list */
 1424                 sg = bccb->sg_list;
 1425                 while (dm_segs < end_seg) {
 1426                         sg->len = dm_segs->ds_len;
 1427                         sg->addr = dm_segs->ds_addr;
 1428                         sg++;
 1429                         dm_segs++;
 1430                 }
 1431 
 1432                 if (nseg > 1) {
 1433                         bccb->hccb.opcode = INITIATOR_SG_CCB_WRESID;
 1434                         bccb->hccb.data_len = sizeof(bt_sg_t) * nseg;
 1435                         bccb->hccb.data_addr = bccb->sg_list_phys;
 1436                 } else {
 1437                         bccb->hccb.data_len = bccb->sg_list->len;
 1438                         bccb->hccb.data_addr = bccb->sg_list->addr;
 1439                 }
 1440 
 1441                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1442                         op = BUS_DMASYNC_PREREAD;
 1443                 else
 1444                         op = BUS_DMASYNC_PREWRITE;
 1445 
 1446                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
 1447 
 1448         } else {
 1449                 bccb->hccb.opcode = INITIATOR_CCB;
 1450                 bccb->hccb.data_len = 0;
 1451                 bccb->hccb.data_addr = 0;
 1452         }
 1453 
 1454         /*
 1455          * Last time we need to check if this CCB needs to
 1456          * be aborted.
 1457          */
 1458         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 1459                 if (nseg != 0)
 1460                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1461                 btfreeccb(bt, bccb);
 1462                 xpt_done(ccb);
 1463                 return;
 1464         }
 1465                 
 1466         bccb->flags = BCCB_ACTIVE;
 1467         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1468         LIST_INSERT_HEAD(&bt->pending_ccbs, &ccb->ccb_h, sim_links.le);
 1469 
 1470         callout_reset_sbt(&bccb->timer, SBT_1MS * ccb->ccb_h.timeout, 0,
 1471             bttimeout, bccb, 0);
 1472 
 1473         /* Tell the adapter about this command */
 1474         bt->cur_outbox->ccb_addr = btccbvtop(bt, bccb);
 1475         if (bt->cur_outbox->action_code != BMBO_FREE) {
 1476                 /*
 1477                  * We should never encounter a busy mailbox.
 1478                  * If we do, warn the user, and treat it as
 1479                  * a resource shortage.  If the controller is
 1480                  * hung, one of the pending transactions will
 1481                  * timeout causing us to start recovery operations.
 1482                  */
 1483                 device_printf(bt->dev,
 1484                               "Encountered busy mailbox with %d out of %d "
 1485                               "commands active!!!\n", bt->active_ccbs,
 1486                               bt->max_ccbs);
 1487                 callout_stop(&bccb->timer);
 1488                 if (nseg != 0)
 1489                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1490                 btfreeccb(bt, bccb);
 1491                 bt->resource_shortage = TRUE;
 1492                 xpt_freeze_simq(bt->sim, /*count*/1);
 1493                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1494                 xpt_done(ccb);
 1495                 return;
 1496         }
 1497         bt->cur_outbox->action_code = BMBO_START;       
 1498         bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
 1499         btnextoutbox(bt);
 1500 }
 1501 
 1502 void
 1503 bt_intr(void *arg)
 1504 {
 1505         struct  bt_softc *bt;
 1506 
 1507         bt = arg;
 1508         mtx_lock(&bt->lock);
 1509         bt_intr_locked(bt);
 1510         mtx_unlock(&bt->lock);
 1511 }
 1512 
 1513 void
 1514 bt_intr_locked(struct bt_softc *bt)
 1515 {
 1516         u_int   intstat;
 1517 
 1518         while (((intstat = bt_inb(bt, INTSTAT_REG)) & INTR_PENDING) != 0) {
 1519 
 1520                 if ((intstat & CMD_COMPLETE) != 0) {
 1521                         bt->latched_status = bt_inb(bt, STATUS_REG);
 1522                         bt->command_cmp = TRUE;
 1523                 }
 1524 
 1525                 bt_outb(bt, CONTROL_REG, RESET_INTR);
 1526 
 1527                 if ((intstat & IMB_LOADED) != 0) {
 1528                         while (bt->cur_inbox->comp_code != BMBI_FREE) {
 1529                                 btdone(bt,
 1530                                        btccbptov(bt, bt->cur_inbox->ccb_addr),
 1531                                        bt->cur_inbox->comp_code);
 1532                                 bt->cur_inbox->comp_code = BMBI_FREE;
 1533                                 btnextinbox(bt);
 1534                         }
 1535                 }
 1536 
 1537                 if ((intstat & SCSI_BUS_RESET) != 0) {
 1538                         btreset(bt, /*hardreset*/FALSE);
 1539                 }
 1540         }
 1541 }
 1542 
 1543 static void
 1544 btdone(struct bt_softc *bt, struct bt_ccb *bccb, bt_mbi_comp_code_t comp_code)
 1545 {
 1546         union  ccb        *ccb;
 1547         struct ccb_scsiio *csio;
 1548 
 1549         ccb = bccb->ccb;
 1550         csio = &bccb->ccb->csio;
 1551 
 1552         if ((bccb->flags & BCCB_ACTIVE) == 0) {
 1553                 device_printf(bt->dev,
 1554                               "btdone - Attempt to free non-active BCCB %p\n",
 1555                               (void *)bccb);
 1556                 return;
 1557         }
 1558 
 1559         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1560                 bus_dmasync_op_t op;
 1561 
 1562                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1563                         op = BUS_DMASYNC_POSTREAD;
 1564                 else
 1565                         op = BUS_DMASYNC_POSTWRITE;
 1566                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
 1567                 bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1568         }
 1569 
 1570         if (bccb == bt->recovery_bccb) {
 1571                 /*
 1572                  * The recovery BCCB does not have a CCB associated
 1573                  * with it, so short circuit the normal error handling.
 1574                  * We now traverse our list of pending CCBs and process
 1575                  * any that were terminated by the recovery CCBs action.
 1576                  * We also reinstate timeouts for all remaining, pending,
 1577                  * CCBs.
 1578                  */
 1579                 struct cam_path *path;
 1580                 struct ccb_hdr *ccb_h;
 1581                 cam_status error;
 1582 
 1583                 /* Notify all clients that a BDR occured */
 1584                 error = xpt_create_path(&path, /*periph*/NULL,
 1585                                         cam_sim_path(bt->sim),
 1586                                         bccb->hccb.target_id,
 1587                                         CAM_LUN_WILDCARD);
 1588                 
 1589                 if (error == CAM_REQ_CMP) {
 1590                         xpt_async(AC_SENT_BDR, path, NULL);
 1591                         xpt_free_path(path);
 1592                 }
 1593 
 1594                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
 1595                 while (ccb_h != NULL) {
 1596                         struct bt_ccb *pending_bccb;
 1597 
 1598                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 1599                         if (pending_bccb->hccb.target_id
 1600                          == bccb->hccb.target_id) {
 1601                                 pending_bccb->hccb.btstat = BTSTAT_HA_BDR;
 1602                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1603                                 btdone(bt, pending_bccb, BMBI_ERROR);
 1604                         } else {
 1605                                 callout_reset_sbt(&pending_bccb->timer,
 1606                                     SBT_1MS * ccb_h->timeout, 0, bttimeout,
 1607                                     pending_bccb, 0);
 1608                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1609                         }
 1610                 }
 1611                 device_printf(bt->dev, "No longer in timeout\n");
 1612                 return;
 1613         }
 1614 
 1615         callout_stop(&bccb->timer);
 1616 
 1617         switch (comp_code) {
 1618         case BMBI_FREE:
 1619                 device_printf(bt->dev,
 1620                               "btdone - CCB completed with free status!\n");
 1621                 break;
 1622         case BMBI_NOT_FOUND:
 1623                 device_printf(bt->dev,
 1624                               "btdone - CCB Abort failed to find CCB\n");
 1625                 break;
 1626         case BMBI_ABORT:
 1627         case BMBI_ERROR:
 1628                 if (bootverbose) {
 1629                         printf("bt: ccb %p - error %x occured.  "
 1630                                "btstat = %x, sdstat = %x\n",
 1631                                (void *)bccb, comp_code, bccb->hccb.btstat,
 1632                                bccb->hccb.sdstat);
 1633                 }
 1634                 /* An error occured */
 1635                 switch(bccb->hccb.btstat) {
 1636                 case BTSTAT_DATARUN_ERROR:
 1637                         if (bccb->hccb.data_len == 0) {
 1638                                 /*
 1639                                  * At least firmware 4.22, does this
 1640                                  * for a QUEUE FULL condition.
 1641                                  */
 1642                                 bccb->hccb.sdstat = SCSI_STATUS_QUEUE_FULL;
 1643                         } else if (bccb->hccb.data_len < 0) {
 1644                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
 1645                                 break;
 1646                         }
 1647                         /* FALLTHROUGH */
 1648                 case BTSTAT_NOERROR:
 1649                 case BTSTAT_LINKED_CMD_COMPLETE:
 1650                 case BTSTAT_LINKED_CMD_FLAG_COMPLETE:
 1651                 case BTSTAT_DATAUNDERUN_ERROR:
 1652 
 1653                         csio->scsi_status = bccb->hccb.sdstat;
 1654                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 1655                         switch(csio->scsi_status) {
 1656                         case SCSI_STATUS_CHECK_COND:
 1657                         case SCSI_STATUS_CMD_TERMINATED:
 1658                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 1659                                 /* Bounce sense back if necessary */
 1660                                 if (bt->sense_buffers != NULL) {
 1661                                         csio->sense_data =
 1662                                             *btsensevaddr(bt, bccb);
 1663                                 }
 1664                                 break;
 1665                         default:
 1666                                 break;
 1667                         case SCSI_STATUS_OK:
 1668                                 csio->ccb_h.status = CAM_REQ_CMP;
 1669                                 break;
 1670                         }
 1671                         csio->resid = bccb->hccb.data_len;
 1672                         break;
 1673                 case BTSTAT_SELTIMEOUT:
 1674                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
 1675                         break;
 1676                 case BTSTAT_UNEXPECTED_BUSFREE:
 1677                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
 1678                         break;
 1679                 case BTSTAT_INVALID_PHASE:
 1680                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
 1681                         break;
 1682                 case BTSTAT_INVALID_ACTION_CODE:
 1683                         panic("%s: Inavlid Action code", bt_name(bt));
 1684                         break;
 1685                 case BTSTAT_INVALID_OPCODE:
 1686                         panic("%s: Inavlid CCB Opcode code", bt_name(bt));
 1687                         break;
 1688                 case BTSTAT_LINKED_CCB_LUN_MISMATCH:
 1689                         /* We don't even support linked commands... */
 1690                         panic("%s: Linked CCB Lun Mismatch", bt_name(bt));
 1691                         break;
 1692                 case BTSTAT_INVALID_CCB_OR_SG_PARAM:
 1693                         panic("%s: Invalid CCB or SG list", bt_name(bt));
 1694                         break;
 1695                 case BTSTAT_AUTOSENSE_FAILED:
 1696                         csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
 1697                         break;
 1698                 case BTSTAT_TAGGED_MSG_REJECTED:
 1699                 {
 1700                         struct ccb_trans_settings neg; 
 1701                         struct ccb_trans_settings_scsi *scsi =
 1702                             &neg.proto_specific.scsi;
 1703 
 1704                         neg.protocol = PROTO_SCSI;
 1705                         neg.protocol_version = SCSI_REV_2;
 1706                         neg.transport = XPORT_SPI;
 1707                         neg.transport_version = 2;
 1708                         scsi->valid = CTS_SCSI_VALID_TQ;
 1709                         scsi->flags = 0;
 1710                         xpt_print_path(csio->ccb_h.path);
 1711                         printf("refuses tagged commands.  Performing "
 1712                                "non-tagged I/O\n");
 1713                         xpt_setup_ccb(&neg.ccb_h, csio->ccb_h.path,
 1714                                       /*priority*/1); 
 1715                         xpt_async(AC_TRANSFER_NEG, csio->ccb_h.path, &neg);
 1716                         bt->tags_permitted &= ~(0x01 << csio->ccb_h.target_id);
 1717                         csio->ccb_h.status = CAM_MSG_REJECT_REC;
 1718                         break;
 1719                 }
 1720                 case BTSTAT_UNSUPPORTED_MSG_RECEIVED:
 1721                         /*
 1722                          * XXX You would think that this is
 1723                          *     a recoverable error... Hmmm.
 1724                          */
 1725                         csio->ccb_h.status = CAM_REQ_CMP_ERR;
 1726                         break;
 1727                 case BTSTAT_HA_SOFTWARE_ERROR:
 1728                 case BTSTAT_HA_WATCHDOG_ERROR:
 1729                 case BTSTAT_HARDWARE_FAILURE:
 1730                         /* Hardware reset ??? Can we recover ??? */
 1731                         csio->ccb_h.status = CAM_NO_HBA;
 1732                         break;
 1733                 case BTSTAT_TARGET_IGNORED_ATN:
 1734                 case BTSTAT_OTHER_SCSI_BUS_RESET:
 1735                 case BTSTAT_HA_SCSI_BUS_RESET:
 1736                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
 1737                          != CAM_CMD_TIMEOUT)
 1738                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
 1739                         break;
 1740                 case BTSTAT_HA_BDR:
 1741                         if ((bccb->flags & BCCB_DEVICE_RESET) == 0)
 1742                                 csio->ccb_h.status = CAM_BDR_SENT;
 1743                         else
 1744                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
 1745                         break;
 1746                 case BTSTAT_INVALID_RECONNECT:
 1747                 case BTSTAT_ABORT_QUEUE_GENERATED:
 1748                         csio->ccb_h.status = CAM_REQ_TERMIO;
 1749                         break;
 1750                 case BTSTAT_SCSI_PERROR_DETECTED:
 1751                         csio->ccb_h.status = CAM_UNCOR_PARITY;
 1752                         break;
 1753                 }
 1754                 if (csio->ccb_h.status != CAM_REQ_CMP) {
 1755                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
 1756                         csio->ccb_h.status |= CAM_DEV_QFRZN;
 1757                 }
 1758                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
 1759                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1760                 btfreeccb(bt, bccb);
 1761                 xpt_done(ccb);
 1762                 break;
 1763         case BMBI_OK:
 1764                 /* All completed without incident */
 1765                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1766                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
 1767                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1768                 btfreeccb(bt, bccb);
 1769                 xpt_done(ccb);
 1770                 break;
 1771         }
 1772 }
 1773 
 1774 static int
 1775 btreset(struct bt_softc* bt, int hard_reset)
 1776 {
 1777         struct   ccb_hdr *ccb_h;
 1778         u_int    status;
 1779         u_int    timeout;
 1780         u_int8_t reset_type;
 1781 
 1782         if (hard_reset != 0)
 1783                 reset_type = HARD_RESET;
 1784         else
 1785                 reset_type = SOFT_RESET;
 1786         bt_outb(bt, CONTROL_REG, reset_type);
 1787 
 1788         /* Wait 5sec. for Diagnostic start */
 1789         timeout = 5 * 10000;
 1790         while (--timeout) {
 1791                 status = bt_inb(bt, STATUS_REG);
 1792                 if ((status & DIAG_ACTIVE) != 0)
 1793                         break;
 1794                 DELAY(100);
 1795         }
 1796         if (timeout == 0) {
 1797                 if (bootverbose)
 1798                         device_printf(bt->dev,
 1799                             "btreset - Diagnostic Active failed to "
 1800                             "assert. status = 0x%x\n", status);
 1801                 return (ETIMEDOUT);
 1802         }
 1803 
 1804         /* Wait 10sec. for Diagnostic end */
 1805         timeout = 10 * 10000;
 1806         while (--timeout) {
 1807                 status = bt_inb(bt, STATUS_REG);
 1808                 if ((status & DIAG_ACTIVE) == 0)
 1809                         break;
 1810                 DELAY(100);
 1811         }
 1812         if (timeout == 0) {
 1813                 panic("%s: btreset - Diagnostic Active failed to drop. "
 1814                        "status = 0x%x\n", bt_name(bt), status);
 1815                 return (ETIMEDOUT);
 1816         }
 1817 
 1818         /* Wait for the host adapter to become ready or report a failure */
 1819         timeout = 10000;
 1820         while (--timeout) {
 1821                 status = bt_inb(bt, STATUS_REG);
 1822                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
 1823                         break;
 1824                 DELAY(100);
 1825         }
 1826         if (timeout == 0) {
 1827                 device_printf(bt->dev,
 1828                     "btreset - Host adapter failed to come ready. "
 1829                     "status = 0x%x\n", status);
 1830                 return (ETIMEDOUT);
 1831         }
 1832 
 1833         /* If the diagnostics failed, tell the user */
 1834         if ((status & DIAG_FAIL) != 0
 1835          || (status & HA_READY) == 0) {
 1836                 device_printf(bt->dev,
 1837                     "btreset - Adapter failed diagnostics\n");
 1838 
 1839                 if ((status & DATAIN_REG_READY) != 0)
 1840                         device_printf(bt->dev,
 1841                             "btreset - Host Adapter Error code = 0x%x\n",
 1842                             bt_inb(bt, DATAIN_REG));
 1843                 return (ENXIO);
 1844         }
 1845 
 1846         /* If we've allocated mailboxes, initialize them */
 1847         if (bt->init_level > 4)
 1848                 btinitmboxes(bt);
 1849 
 1850         /* If we've attached to the XPT, tell it about the event */
 1851         if (bt->path != NULL)
 1852                 xpt_async(AC_BUS_RESET, bt->path, NULL);
 1853 
 1854         /*
 1855          * Perform completion processing for all outstanding CCBs.
 1856          */
 1857         while ((ccb_h = LIST_FIRST(&bt->pending_ccbs)) != NULL) {
 1858                 struct bt_ccb *pending_bccb;
 1859 
 1860                 pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 1861                 pending_bccb->hccb.btstat = BTSTAT_HA_SCSI_BUS_RESET;
 1862                 btdone(bt, pending_bccb, BMBI_ERROR);
 1863         }
 1864 
 1865         return (0);
 1866 }
 1867 
 1868 /*
 1869  * Send a command to the adapter.
 1870  */
 1871 int
 1872 bt_cmd(struct bt_softc *bt, bt_op_t opcode, u_int8_t *params, u_int param_len,
 1873       u_int8_t *reply_data, u_int reply_len, u_int cmd_timeout)
 1874 {
 1875         u_int   timeout;
 1876         u_int   status;
 1877         u_int   saved_status;
 1878         u_int   intstat;
 1879         u_int   reply_buf_size;
 1880         int     cmd_complete;
 1881         int     error;
 1882 
 1883         /* No data returned to start */
 1884         reply_buf_size = reply_len;
 1885         reply_len = 0;
 1886         intstat = 0;
 1887         cmd_complete = 0;
 1888         saved_status = 0;
 1889         error = 0;
 1890 
 1891         bt->command_cmp = 0;
 1892         /*
 1893          * Wait up to 10 sec. for the adapter to become
 1894          * ready to accept commands.
 1895          */
 1896         timeout = 100000;
 1897         while (--timeout) {
 1898                 status = bt_inb(bt, STATUS_REG);
 1899                 if ((status & HA_READY) != 0
 1900                  && (status & CMD_REG_BUSY) == 0)
 1901                         break;
 1902                 /*
 1903                  * Throw away any pending data which may be
 1904                  * left over from earlier commands that we
 1905                  * timedout on.
 1906                  */
 1907                 if ((status & DATAIN_REG_READY) != 0)
 1908                         (void)bt_inb(bt, DATAIN_REG);
 1909                 DELAY(100);
 1910         }
 1911         if (timeout == 0) {
 1912                 device_printf(bt->dev,
 1913                     "bt_cmd: Timeout waiting for adapter ready, "
 1914                     "status = 0x%x\n", status);
 1915                 return (ETIMEDOUT);
 1916         }
 1917 
 1918         /*
 1919          * Send the opcode followed by any necessary parameter bytes.
 1920          */
 1921         bt_outb(bt, COMMAND_REG, opcode);
 1922 
 1923         /*
 1924          * Wait for up to 1sec for each byte of the
 1925          * parameter list sent to be sent.
 1926          */
 1927         timeout = 10000;
 1928         while (param_len && --timeout) {
 1929                 DELAY(100);
 1930                 status = bt_inb(bt, STATUS_REG);
 1931                 intstat = bt_inb(bt, INTSTAT_REG);
 1932         
 1933                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1934                  == (INTR_PENDING|CMD_COMPLETE)) {
 1935                         saved_status = status;
 1936                         cmd_complete = 1;
 1937                         break;
 1938                 }
 1939                 if (bt->command_cmp != 0) {
 1940                         saved_status = bt->latched_status;
 1941                         cmd_complete = 1;
 1942                         break;
 1943                 }
 1944                 if ((status & DATAIN_REG_READY) != 0)
 1945                         break;
 1946                 if ((status & CMD_REG_BUSY) == 0) {
 1947                         bt_outb(bt, COMMAND_REG, *params++);
 1948                         param_len--;
 1949                         timeout = 10000;
 1950                 }
 1951         }
 1952         if (timeout == 0) {
 1953                 device_printf(bt->dev, "bt_cmd: Timeout sending parameters, "
 1954                     "status = 0x%x\n", status);
 1955                 cmd_complete = 1;
 1956                 saved_status = status;
 1957                 error = ETIMEDOUT;
 1958         }
 1959 
 1960         /*
 1961          * Wait for the command to complete.
 1962          */
 1963         while (cmd_complete == 0 && --cmd_timeout) {
 1964 
 1965                 status = bt_inb(bt, STATUS_REG);
 1966                 intstat = bt_inb(bt, INTSTAT_REG);
 1967                 /*
 1968                  * It may be that this command was issued with
 1969                  * controller interrupts disabled.  We'll never
 1970                  * get to our command if an incoming mailbox
 1971                  * interrupt is pending, so take care of completed
 1972                  * mailbox commands by calling our interrupt handler.
 1973                  */
 1974                 if ((intstat & (INTR_PENDING|IMB_LOADED))
 1975                  == (INTR_PENDING|IMB_LOADED))
 1976                         bt_intr_locked(bt);
 1977 
 1978                 if (bt->command_cmp != 0) {
 1979                         /*
 1980                          * Our interrupt handler saw CMD_COMPLETE
 1981                          * status before we did.
 1982                          */
 1983                         cmd_complete = 1;
 1984                         saved_status = bt->latched_status;
 1985                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1986                         == (INTR_PENDING|CMD_COMPLETE)) {
 1987                         /*
 1988                          * Our poll (in case interrupts are blocked)
 1989                          * saw the CMD_COMPLETE interrupt.
 1990                          */
 1991                         cmd_complete = 1;
 1992                         saved_status = status;
 1993                 } else if (opcode == BOP_MODIFY_IO_ADDR
 1994                         && (status & CMD_REG_BUSY) == 0) {
 1995                         /*
 1996                          * The BOP_MODIFY_IO_ADDR does not issue a CMD_COMPLETE,
 1997                          * but it should update the status register.  So, we
 1998                          * consider this command complete when the CMD_REG_BUSY
 1999                          * status clears.
 2000                          */
 2001                         saved_status = status;
 2002                         cmd_complete = 1;
 2003                 } else if ((status & DATAIN_REG_READY) != 0) {
 2004                         u_int8_t data;
 2005 
 2006                         data = bt_inb(bt, DATAIN_REG);
 2007                         if (reply_len < reply_buf_size) {
 2008                                 *reply_data++ = data;
 2009                         } else {
 2010                                 device_printf(bt->dev,
 2011                                     "bt_cmd - Discarded reply data byte "
 2012                                     "for opcode 0x%x\n", opcode);
 2013                         }
 2014                         /*
 2015                          * Reset timeout to ensure at least a second
 2016                          * between response bytes.
 2017                          */
 2018                         cmd_timeout = MAX(cmd_timeout, 10000);
 2019                         reply_len++;
 2020 
 2021                 } else if ((opcode == BOP_FETCH_LRAM)
 2022                         && (status & HA_READY) != 0) {
 2023                                 saved_status = status;
 2024                                 cmd_complete = 1;
 2025                 }
 2026                 DELAY(100);
 2027         }
 2028         if (cmd_timeout == 0) {
 2029                 device_printf(bt->dev,
 2030                     "bt_cmd: Timeout waiting for command (%x) "
 2031                     "to complete.\n", opcode);
 2032                 device_printf(bt->dev, "status = 0x%x, intstat = 0x%x, "
 2033                     "rlen %d\n", status, intstat, reply_len);
 2034                 error = (ETIMEDOUT);
 2035         }
 2036 
 2037         /*
 2038          * Clear any pending interrupts.
 2039          */
 2040         bt_intr_locked(bt);
 2041         
 2042         if (error != 0)
 2043                 return (error);
 2044 
 2045         /*
 2046          * If the command was rejected by the controller, tell the caller.
 2047          */
 2048         if ((saved_status & CMD_INVALID) != 0) {
 2049                 /*
 2050                  * Some early adapters may not recover properly from
 2051                  * an invalid command.  If it appears that the controller
 2052                  * has wedged (i.e. status was not cleared by our interrupt
 2053                  * reset above), perform a soft reset.
 2054                  */
 2055                 if (bootverbose)
 2056                         device_printf(bt->dev, "Invalid Command 0x%x\n",
 2057                                 opcode);
 2058                 DELAY(1000);
 2059                 status = bt_inb(bt, STATUS_REG);
 2060                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
 2061                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
 2062                  || (status & (HA_READY|INIT_REQUIRED))
 2063                   != (HA_READY|INIT_REQUIRED)) {
 2064                         btreset(bt, /*hard_reset*/FALSE);
 2065                 }
 2066                 return (EINVAL);
 2067         }
 2068 
 2069         if (param_len > 0) {
 2070                 /* The controller did not accept the full argument list */
 2071                 return (E2BIG);
 2072         }
 2073 
 2074         if (reply_len != reply_buf_size) {
 2075                 /* Too much or too little data received */
 2076                 return (EMSGSIZE);
 2077         }
 2078 
 2079         /* We were successful */
 2080         return (0);
 2081 }
 2082 
 2083 static int
 2084 btinitmboxes(struct bt_softc *bt) {
 2085         init_32b_mbox_params_t init_mbox;
 2086         int error;
 2087 
 2088         bzero(bt->in_boxes, sizeof(bt_mbox_in_t) * bt->num_boxes);
 2089         bzero(bt->out_boxes, sizeof(bt_mbox_out_t) * bt->num_boxes);
 2090         bt->cur_inbox = bt->in_boxes;
 2091         bt->last_inbox = bt->in_boxes + bt->num_boxes - 1;
 2092         bt->cur_outbox = bt->out_boxes;
 2093         bt->last_outbox = bt->out_boxes + bt->num_boxes - 1;
 2094 
 2095         /* Tell the adapter about them */
 2096         init_mbox.num_boxes = bt->num_boxes;
 2097         init_mbox.base_addr[0] = bt->mailbox_physbase & 0xFF;
 2098         init_mbox.base_addr[1] = (bt->mailbox_physbase >> 8) & 0xFF;
 2099         init_mbox.base_addr[2] = (bt->mailbox_physbase >> 16) & 0xFF;
 2100         init_mbox.base_addr[3] = (bt->mailbox_physbase >> 24) & 0xFF;
 2101         error = bt_cmd(bt, BOP_INITIALIZE_32BMBOX, (u_int8_t *)&init_mbox,
 2102                        /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
 2103                        /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
 2104 
 2105         if (error != 0)
 2106                 printf("btinitmboxes: Initialization command failed\n");
 2107         else if (bt->strict_rr != 0) {
 2108                 /*
 2109                  * If the controller supports
 2110                  * strict round robin mode,
 2111                  * enable it
 2112                  */
 2113                 u_int8_t param;
 2114 
 2115                 param = 0;
 2116                 error = bt_cmd(bt, BOP_ENABLE_STRICT_RR, &param, 1,
 2117                                /*reply_buf*/NULL, /*reply_len*/0,
 2118                                DEFAULT_CMD_TIMEOUT);
 2119 
 2120                 if (error != 0) {
 2121                         printf("btinitmboxes: Unable to enable strict RR\n");
 2122                         error = 0;
 2123                 } else if (bootverbose) {
 2124                         device_printf(bt->dev,
 2125                             "Using Strict Round Robin Mailbox Mode\n");
 2126                 }
 2127         }
 2128         
 2129         return (error);
 2130 }
 2131 
 2132 /*
 2133  * Update the XPT's idea of the negotiated transfer
 2134  * parameters for a particular target.
 2135  */
 2136 static void
 2137 btfetchtransinfo(struct bt_softc *bt, struct ccb_trans_settings *cts)
 2138 {
 2139         setup_data_t    setup_info;
 2140         u_int           target;
 2141         u_int           targ_offset;
 2142         u_int           targ_mask;
 2143         u_int           sync_period;
 2144         u_int           sync_offset;
 2145         u_int           bus_width;
 2146         int             error;
 2147         u_int8_t        param;
 2148         targ_syncinfo_t sync_info;
 2149         struct ccb_trans_settings_scsi *scsi =
 2150             &cts->proto_specific.scsi;
 2151         struct ccb_trans_settings_spi *spi =
 2152             &cts->xport_specific.spi;
 2153 
 2154         spi->valid = 0;
 2155         scsi->valid = 0;
 2156 
 2157         target = cts->ccb_h.target_id;
 2158         targ_offset = (target & 0x7);
 2159         targ_mask = (0x01 << targ_offset);
 2160 
 2161         /*
 2162          * Inquire Setup Information.  This command retreives the
 2163          * Wide negotiation status for recent adapters as well as
 2164          * the sync info for older models.
 2165          */
 2166         param = sizeof(setup_info);
 2167         error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
 2168                        (u_int8_t*)&setup_info, sizeof(setup_info),
 2169                        DEFAULT_CMD_TIMEOUT);
 2170 
 2171         if (error != 0) {
 2172                 device_printf(bt->dev,
 2173                     "btfetchtransinfo - Inquire Setup Info Failed %x\n",
 2174                     error);
 2175                 return;
 2176         }
 2177 
 2178         sync_info = (target < 8) ? setup_info.low_syncinfo[targ_offset]
 2179                                  : setup_info.high_syncinfo[targ_offset];
 2180 
 2181         if (sync_info.sync == 0)
 2182                 sync_offset = 0;
 2183         else
 2184                 sync_offset = sync_info.offset;
 2185 
 2186 
 2187         bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 2188         if (strcmp(bt->firmware_ver, "5.06L") >= 0) {
 2189                 u_int wide_active;
 2190 
 2191                 wide_active =
 2192                     (target < 8) ? (setup_info.low_wide_active & targ_mask)
 2193                                  : (setup_info.high_wide_active & targ_mask);
 2194 
 2195                 if (wide_active)
 2196                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 2197         } else if ((bt->wide_permitted & targ_mask) != 0) {
 2198                 struct ccb_getdev cgd;
 2199 
 2200                 /*
 2201                  * Prior to rev 5.06L, wide status isn't provided,
 2202                  * so we "guess" that wide transfers are in effect
 2203                  * if the user settings allow for wide and the inquiry
 2204                  * data for the device indicates that it can handle
 2205                  * wide transfers.
 2206                  */
 2207                 xpt_setup_ccb(&cgd.ccb_h, cts->ccb_h.path, /*priority*/1);
 2208                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
 2209                 xpt_action((union ccb *)&cgd);
 2210                 if ((cgd.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
 2211                  && (cgd.inq_data.flags & SID_WBus16) != 0)
 2212                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 2213         }
 2214 
 2215         if (bt->firmware_ver[0] >= '3') {
 2216                 /*
 2217                  * For adapters that can do fast or ultra speeds,
 2218                  * use the more exact Target Sync Information command.
 2219                  */
 2220                 target_sync_info_data_t sync_info;
 2221 
 2222                 param = sizeof(sync_info);
 2223                 error = bt_cmd(bt, BOP_TARG_SYNC_INFO, &param, /*paramlen*/1,
 2224                                (u_int8_t*)&sync_info, sizeof(sync_info),
 2225                                DEFAULT_CMD_TIMEOUT);
 2226                 
 2227                 if (error != 0) {
 2228                         device_printf(bt->dev,
 2229                             "btfetchtransinfo - Inquire Sync "
 2230                             "Info Failed 0x%x\n", error);
 2231                         return;
 2232                 }
 2233                 sync_period = sync_info.sync_rate[target] * 100;
 2234         } else {
 2235                 sync_period = 2000 + (500 * sync_info.period);
 2236         }
 2237 
 2238         cts->protocol = PROTO_SCSI;
 2239         cts->protocol_version = SCSI_REV_2;
 2240         cts->transport = XPORT_SPI;
 2241         cts->transport_version = 2;
 2242 
 2243         spi->sync_period = sync_period;
 2244         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
 2245         spi->sync_offset = sync_offset;
 2246         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
 2247 
 2248         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
 2249         spi->bus_width = bus_width;
 2250 
 2251         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 2252                 scsi->valid = CTS_SCSI_VALID_TQ;
 2253                 spi->valid |= CTS_SPI_VALID_DISC;
 2254         } else
 2255                 scsi->valid = 0;
 2256         
 2257         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
 2258 }
 2259 
 2260 static void
 2261 btmapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2262 {
 2263         struct bt_softc* bt;
 2264 
 2265         bt = (struct bt_softc*)arg;
 2266         bt->mailbox_physbase = segs->ds_addr;
 2267 }
 2268 
 2269 static void
 2270 btmapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2271 {
 2272         struct bt_softc* bt;
 2273 
 2274         bt = (struct bt_softc*)arg;
 2275         bt->bt_ccb_physbase = segs->ds_addr;
 2276 }
 2277 
 2278 static void
 2279 btmapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2280 {
 2281 
 2282         struct bt_softc* bt;
 2283 
 2284         bt = (struct bt_softc*)arg;
 2285         SLIST_FIRST(&bt->sg_maps)->sg_physaddr = segs->ds_addr;
 2286 }
 2287 
 2288 static void
 2289 btpoll(struct cam_sim *sim)
 2290 {
 2291         bt_intr_locked(cam_sim_softc(sim));
 2292 }
 2293 
 2294 void
 2295 bttimeout(void *arg)
 2296 {
 2297         struct bt_ccb   *bccb;
 2298         union  ccb      *ccb;
 2299         struct bt_softc *bt;
 2300 
 2301         bccb = (struct bt_ccb *)arg;
 2302         ccb = bccb->ccb;
 2303         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
 2304         mtx_assert(&bt->lock, MA_OWNED);
 2305         xpt_print_path(ccb->ccb_h.path);
 2306         printf("CCB %p - timed out\n", (void *)bccb);
 2307 
 2308         if ((bccb->flags & BCCB_ACTIVE) == 0) {
 2309                 xpt_print_path(ccb->ccb_h.path);
 2310                 printf("CCB %p - timed out CCB already completed\n",
 2311                        (void *)bccb);
 2312                 return;
 2313         }
 2314 
 2315         /*
 2316          * In order to simplify the recovery process, we ask the XPT
 2317          * layer to halt the queue of new transactions and we traverse
 2318          * the list of pending CCBs and remove their timeouts. This
 2319          * means that the driver attempts to clear only one error
 2320          * condition at a time.  In general, timeouts that occur
 2321          * close together are related anyway, so there is no benefit
 2322          * in attempting to handle errors in parrallel.  Timeouts will
 2323          * be reinstated when the recovery process ends.
 2324          */
 2325         if ((bccb->flags & BCCB_DEVICE_RESET) == 0) {
 2326                 struct ccb_hdr *ccb_h;
 2327 
 2328                 if ((bccb->flags & BCCB_RELEASE_SIMQ) == 0) {
 2329                         xpt_freeze_simq(bt->sim, /*count*/1);
 2330                         bccb->flags |= BCCB_RELEASE_SIMQ;
 2331                 }
 2332 
 2333                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
 2334                 while (ccb_h != NULL) {
 2335                         struct bt_ccb *pending_bccb;
 2336 
 2337                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 2338                         callout_stop(&pending_bccb->timer);
 2339                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 2340                 }
 2341         }
 2342 
 2343         if ((bccb->flags & BCCB_DEVICE_RESET) != 0
 2344          || bt->cur_outbox->action_code != BMBO_FREE
 2345          || ((bccb->hccb.tag_enable == TRUE)
 2346           && (bt->firmware_ver[0] < '5'))) {
 2347                 /*
 2348                  * Try a full host adapter/SCSI bus reset.
 2349                  * We do this only if we have already attempted
 2350                  * to clear the condition with a BDR, or we cannot
 2351                  * attempt a BDR for lack of mailbox resources
 2352                  * or because of faulty firmware.  It turns out
 2353                  * that firmware versions prior to 5.xx treat BDRs
 2354                  * as untagged commands that cannot be sent until
 2355                  * all outstanding tagged commands have been processed.
 2356                  * This makes it somewhat difficult to use a BDR to
 2357                  * clear up a problem with an uncompleted tagged command.
 2358                  */
 2359                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 2360                 btreset(bt, /*hardreset*/TRUE);
 2361                 device_printf(bt->dev, "No longer in timeout\n");
 2362         } else {
 2363                 /*    
 2364                  * Send a Bus Device Reset message:
 2365                  * The target that is holding up the bus may not
 2366                  * be the same as the one that triggered this timeout
 2367                  * (different commands have different timeout lengths),
 2368                  * but we have no way of determining this from our
 2369                  * timeout handler.  Our strategy here is to queue a
 2370                  * BDR message to the target of the timed out command.
 2371                  * If this fails, we'll get another timeout 2 seconds
 2372                  * later which will attempt a bus reset.
 2373                  */
 2374                 bccb->flags |= BCCB_DEVICE_RESET;
 2375                 callout_reset(&bccb->timer, 2 * hz, bttimeout, bccb);
 2376 
 2377                 bt->recovery_bccb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
 2378 
 2379                 /* No Data Transfer */
 2380                 bt->recovery_bccb->hccb.datain = TRUE;
 2381                 bt->recovery_bccb->hccb.dataout = TRUE;
 2382                 bt->recovery_bccb->hccb.btstat = 0;
 2383                 bt->recovery_bccb->hccb.sdstat = 0;
 2384                 bt->recovery_bccb->hccb.target_id = ccb->ccb_h.target_id;
 2385 
 2386                 /* Tell the adapter about this command */
 2387                 bt->cur_outbox->ccb_addr = btccbvtop(bt, bt->recovery_bccb);
 2388                 bt->cur_outbox->action_code = BMBO_START;
 2389                 bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
 2390                 btnextoutbox(bt);
 2391         }
 2392 }
 2393 
 2394 MODULE_VERSION(bt, 1);
 2395 MODULE_DEPEND(bt, cam, 1, 1, 1);

Cache object: 7d68d9b9d8a31989e1ca2789bfb53a8e


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