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("$FreeBSD$");
   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/systm.h> 
   47 #include <sys/malloc.h>
   48 #include <sys/kernel.h>
   49 #include <sys/lock.h>
   50 #include <sys/module.h>
   51 #include <sys/mutex.h>
   52 #include <sys/sysctl.h>
   53 #include <sys/bus.h>
   54  
   55 #include <machine/bus.h>
   56 #include <sys/rman.h>
   57 
   58 #include <cam/cam.h>
   59 #include <cam/cam_ccb.h>
   60 #include <cam/cam_sim.h>
   61 #include <cam/cam_xpt_sim.h>
   62 #include <cam/cam_debug.h>
   63 
   64 #include <cam/scsi/scsi_message.h>
   65 
   66 #include <vm/vm.h>
   67 #include <vm/pmap.h>
   68  
   69 #include <dev/buslogic/btreg.h>
   70 
   71 /* MailBox Management functions */
   72 static __inline void    btnextinbox(struct bt_softc *bt);
   73 static __inline void    btnextoutbox(struct bt_softc *bt);
   74 
   75 static __inline void
   76 btnextinbox(struct bt_softc *bt)
   77 {
   78         if (bt->cur_inbox == bt->last_inbox)
   79                 bt->cur_inbox = bt->in_boxes;
   80         else
   81                 bt->cur_inbox++;
   82 }
   83 
   84 static __inline void
   85 btnextoutbox(struct bt_softc *bt)
   86 {
   87         if (bt->cur_outbox == bt->last_outbox)
   88                 bt->cur_outbox = bt->out_boxes;
   89         else
   90                 bt->cur_outbox++;
   91 }
   92 
   93 /* CCB Mangement functions */
   94 static __inline u_int32_t               btccbvtop(struct bt_softc *bt,
   95                                                   struct bt_ccb *bccb);
   96 static __inline struct bt_ccb*          btccbptov(struct bt_softc *bt,
   97                                                   u_int32_t ccb_addr);
   98 static __inline u_int32_t               btsensepaddr(struct bt_softc *bt,
   99                                                      struct bt_ccb *bccb);
  100 static __inline struct scsi_sense_data* btsensevaddr(struct bt_softc *bt,
  101                                                      struct bt_ccb *bccb);
  102 
  103 static __inline u_int32_t
  104 btccbvtop(struct bt_softc *bt, struct bt_ccb *bccb)
  105 {
  106         return (bt->bt_ccb_physbase
  107               + (u_int32_t)((caddr_t)bccb - (caddr_t)bt->bt_ccb_array));
  108 }
  109 
  110 static __inline struct bt_ccb *
  111 btccbptov(struct bt_softc *bt, u_int32_t ccb_addr)
  112 {
  113         return (bt->bt_ccb_array +
  114                 ((struct bt_ccb*)(uintptr_t)ccb_addr - (struct bt_ccb*)(uintptr_t)bt->bt_ccb_physbase));
  115 }
  116 
  117 static __inline u_int32_t
  118 btsensepaddr(struct bt_softc *bt, struct bt_ccb *bccb)
  119 {
  120         u_int index;
  121 
  122         index = (u_int)(bccb - bt->bt_ccb_array);
  123         return (bt->sense_buffers_physbase
  124                 + (index * sizeof(struct scsi_sense_data)));
  125 }
  126 
  127 static __inline struct scsi_sense_data *
  128 btsensevaddr(struct bt_softc *bt, struct bt_ccb *bccb)
  129 {
  130         u_int index;
  131 
  132         index = (u_int)(bccb - bt->bt_ccb_array);
  133         return (bt->sense_buffers + index);
  134 }
  135 
  136 static __inline struct bt_ccb*  btgetccb(struct bt_softc *bt);
  137 static __inline void            btfreeccb(struct bt_softc *bt,
  138                                           struct bt_ccb *bccb);
  139 static void             btallocccbs(struct bt_softc *bt);
  140 static bus_dmamap_callback_t btexecuteccb;
  141 static void             btdone(struct bt_softc *bt, struct bt_ccb *bccb,
  142                                bt_mbi_comp_code_t comp_code);
  143 
  144 /* Host adapter command functions */
  145 static int      btreset(struct bt_softc* bt, int hard_reset);
  146 
  147 /* Initialization functions */
  148 static int                      btinitmboxes(struct bt_softc *bt);
  149 static bus_dmamap_callback_t    btmapmboxes;
  150 static bus_dmamap_callback_t    btmapccbs;
  151 static bus_dmamap_callback_t    btmapsgs;
  152 
  153 /* Transfer Negotiation Functions */
  154 static void btfetchtransinfo(struct bt_softc *bt,
  155                              struct ccb_trans_settings *cts);
  156 
  157 /* CAM SIM entry points */
  158 #define ccb_bccb_ptr spriv_ptr0
  159 #define ccb_bt_ptr spriv_ptr1
  160 static void     btaction(struct cam_sim *sim, union ccb *ccb);
  161 static void     btpoll(struct cam_sim *sim);
  162 
  163 /* Our timeout handler */
  164 timeout_t bttimeout;
  165 
  166 u_long bt_unit = 0;
  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->unit = device_get_unit(dev);
  210         bt->port = port;
  211         bt->irq = irq;
  212         bt->drq = drq;
  213         bt->tag = rman_get_bustag(port);
  214         bt->bsh = rman_get_bushandle(port);
  215 }
  216 
  217 void
  218 bt_free_softc(device_t dev)
  219 {
  220         struct bt_softc *bt = device_get_softc(dev);
  221 
  222         switch (bt->init_level) {
  223         default:
  224         case 11:
  225                 bus_dmamap_unload(bt->sense_dmat, bt->sense_dmamap);
  226         case 10:
  227                 bus_dmamem_free(bt->sense_dmat, bt->sense_buffers,
  228                                 bt->sense_dmamap);
  229         case 9:
  230                 bus_dma_tag_destroy(bt->sense_dmat);
  231         case 8:
  232         {
  233                 struct sg_map_node *sg_map;
  234 
  235                 while ((sg_map = SLIST_FIRST(&bt->sg_maps))!= NULL) {
  236                         SLIST_REMOVE_HEAD(&bt->sg_maps, links);
  237                         bus_dmamap_unload(bt->sg_dmat,
  238                                           sg_map->sg_dmamap);
  239                         bus_dmamem_free(bt->sg_dmat, sg_map->sg_vaddr,
  240                                         sg_map->sg_dmamap);
  241                         free(sg_map, M_DEVBUF);
  242                 }
  243                 bus_dma_tag_destroy(bt->sg_dmat);
  244         }
  245         case 7:
  246                 bus_dmamap_unload(bt->ccb_dmat, bt->ccb_dmamap);
  247                 /* FALLTHROUGH */
  248         case 6:
  249                 bus_dmamem_free(bt->ccb_dmat, bt->bt_ccb_array,
  250                                 bt->ccb_dmamap);
  251                 bus_dmamap_destroy(bt->ccb_dmat, bt->ccb_dmamap);
  252                 /* FALLTHROUGH */
  253         case 5:
  254                 bus_dma_tag_destroy(bt->ccb_dmat);
  255                 /* FALLTHROUGH */
  256         case 4:
  257                 bus_dmamap_unload(bt->mailbox_dmat, bt->mailbox_dmamap);
  258                 /* FALLTHROUGH */
  259         case 3:
  260                 bus_dmamem_free(bt->mailbox_dmat, bt->in_boxes,
  261                                 bt->mailbox_dmamap);
  262                 bus_dmamap_destroy(bt->mailbox_dmat, bt->mailbox_dmamap);
  263                 /* FALLTHROUGH */
  264         case 2:
  265                 bus_dma_tag_destroy(bt->buffer_dmat);
  266                 /* FALLTHROUGH */
  267         case 1:
  268                 bus_dma_tag_destroy(bt->mailbox_dmat);
  269                 /* FALLTHROUGH */
  270         case 0:
  271                 break;
  272         }
  273 }
  274 
  275 int
  276 bt_port_probe(device_t dev, struct bt_probe_info *info)
  277 {
  278         struct bt_softc *bt = device_get_softc(dev);
  279         config_data_t config_data;
  280         int error;
  281 
  282         /* See if there is really a card present */
  283         if (bt_probe(dev) || bt_fetch_adapter_info(dev))
  284                 return(1);
  285 
  286         /*
  287          * Determine our IRQ, and DMA settings and
  288          * export them to the configuration system.
  289          */
  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         if (error != 0) {
  294                 printf("bt_port_probe: Could not determine IRQ or DMA "
  295                        "settings for adapter.\n");
  296                 return (1);
  297         }
  298 
  299         if (bt->model[0] == '5') {
  300                 /* DMA settings only make sense for ISA cards */
  301                 switch (config_data.dma_chan) {
  302                 case DMA_CHAN_5:
  303                         info->drq = 5;
  304                         break;
  305                 case DMA_CHAN_6:
  306                         info->drq = 6;
  307                         break;
  308                 case DMA_CHAN_7:
  309                         info->drq = 7;
  310                         break;
  311                 default:
  312                         printf("bt_port_probe: Invalid DMA setting "
  313                                "detected for adapter.\n");
  314                         return (1);
  315                 }
  316         } else {
  317                 /* VL/EISA/PCI DMA */
  318                 info->drq = -1;
  319         }
  320         switch (config_data.irq) {
  321         case IRQ_9:
  322         case IRQ_10:
  323         case IRQ_11:
  324         case IRQ_12:
  325         case IRQ_14:
  326         case IRQ_15:
  327                 info->irq = ffs(config_data.irq) + 8;
  328                 break;
  329         default:
  330                 printf("bt_port_probe: Invalid IRQ setting %x"
  331                        "detected for adapter.\n", config_data.irq);
  332                 return (1);
  333         }
  334         return (0);
  335 }
  336 
  337 /*
  338  * Probe the adapter and verify that the card is a BusLogic.
  339  */
  340 int
  341 bt_probe(device_t dev)
  342 {
  343         struct bt_softc *bt = device_get_softc(dev);
  344         esetup_info_data_t esetup_info;
  345         u_int    status;
  346         u_int    intstat;
  347         u_int    geometry;
  348         int      error;
  349         u_int8_t param;
  350 
  351         /*
  352          * See if the three I/O ports look reasonable.
  353          * Touch the minimal number of registers in the
  354          * failure case.
  355          */
  356         status = bt_inb(bt, STATUS_REG);
  357         if ((status == 0)
  358          || (status & (DIAG_ACTIVE|CMD_REG_BUSY|
  359                        STATUS_REG_RSVD|CMD_INVALID)) != 0) {
  360                 if (bootverbose)
  361                         device_printf(dev, "Failed Status Reg Test - %x\n",
  362                                status);
  363                 return (ENXIO);
  364         }
  365 
  366         intstat = bt_inb(bt, INTSTAT_REG);
  367         if ((intstat & INTSTAT_REG_RSVD) != 0) {
  368                 device_printf(dev, "Failed Intstat Reg Test\n");
  369                 return (ENXIO);
  370         }
  371 
  372         geometry = bt_inb(bt, GEOMETRY_REG);
  373         if (geometry == 0xFF) {
  374                 if (bootverbose)
  375                         device_printf(dev, "Failed Geometry Reg Test\n");
  376                 return (ENXIO);
  377         }
  378 
  379         /*
  380          * Looking good so far.  Final test is to reset the
  381          * adapter and attempt to fetch the extended setup
  382          * information.  This should filter out all 1542 cards.
  383          */
  384         if ((error = btreset(bt, /*hard_reset*/TRUE)) != 0) {
  385                 if (bootverbose)
  386                         device_printf(dev, "Failed Reset\n");
  387                 return (ENXIO);
  388         }
  389         
  390         param = sizeof(esetup_info);
  391         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &param, /*parmlen*/1,
  392                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
  393                        DEFAULT_CMD_TIMEOUT);
  394         if (error != 0) {
  395                 return (ENXIO);
  396         }
  397 
  398         return (0);
  399 }
  400 
  401 /*
  402  * Pull the boards setup information and record it in our softc.
  403  */
  404 int
  405 bt_fetch_adapter_info(device_t dev)
  406 {
  407         struct bt_softc *bt = device_get_softc(dev);
  408         board_id_data_t board_id;
  409         esetup_info_data_t esetup_info;
  410         config_data_t config_data;
  411         int      error;
  412         u_int8_t length_param;
  413 
  414         /* First record the firmware version */
  415         error = bt_cmd(bt, BOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
  416                        (u_int8_t*)&board_id, sizeof(board_id),
  417                        DEFAULT_CMD_TIMEOUT);
  418         if (error != 0) {
  419                 device_printf(dev, "bt_fetch_adapter_info - Failed Get Board Info\n");
  420                 return (error);
  421         }
  422         bt->firmware_ver[0] = board_id.firmware_rev_major;
  423         bt->firmware_ver[1] = '.';
  424         bt->firmware_ver[2] = board_id.firmware_rev_minor;
  425         bt->firmware_ver[3] = '\0';
  426                 
  427         /*
  428          * Depending on the firmware major and minor version,
  429          * we may be able to fetch additional minor version info.
  430          */
  431         if (bt->firmware_ver[0] > '') {
  432                 
  433                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_3DIG, NULL, /*parmlen*/0,
  434                                (u_int8_t*)&bt->firmware_ver[3], 1,
  435                                DEFAULT_CMD_TIMEOUT);
  436                 if (error != 0) {
  437                         device_printf(dev,
  438                                       "bt_fetch_adapter_info - Failed Get "
  439                                       "Firmware 3rd Digit\n");
  440                         return (error);
  441                 }
  442                 if (bt->firmware_ver[3] == ' ')
  443                         bt->firmware_ver[3] = '\0';
  444                 bt->firmware_ver[4] = '\0';
  445         }
  446 
  447         if (strcmp(bt->firmware_ver, "3.3") >= 0) {
  448 
  449                 error = bt_cmd(bt, BOP_INQUIRE_FW_VER_4DIG, NULL, /*parmlen*/0,
  450                                (u_int8_t*)&bt->firmware_ver[4], 1,
  451                                DEFAULT_CMD_TIMEOUT);
  452                 if (error != 0) {
  453                         device_printf(dev,
  454                                       "bt_fetch_adapter_info - Failed Get "
  455                                       "Firmware 4th Digit\n");
  456                         return (error);
  457                 }
  458                 if (bt->firmware_ver[4] == ' ')
  459                         bt->firmware_ver[4] = '\0';
  460                 bt->firmware_ver[5] = '\0';
  461         }
  462 
  463         /*
  464          * Some boards do not handle the "recently documented"
  465          * Inquire Board Model Number command correctly or do not give
  466          * exact information.  Use the Firmware and Extended Setup
  467          * information in these cases to come up with the right answer.
  468          * The major firmware revision number indicates:
  469          *
  470          *      5.xx    BusLogic "W" Series Host Adapters:
  471          *              BT-948/958/958D
  472          *      4.xx    BusLogic "C" Series Host Adapters:
  473          *              BT-946C/956C/956CD/747C/757C/757CD/445C/545C/540CF
  474          *      3.xx    BusLogic "S" Series Host Adapters:
  475          *              BT-747S/747D/757S/757D/445S/545S/542D
  476          *              BT-542B/742A (revision H)
  477          *      2.xx    BusLogic "A" Series Host Adapters:
  478          *              BT-542B/742A (revision G and below)
  479          *      0.xx    AMI FastDisk VLB/EISA BusLogic Clone Host Adapter
  480          */
  481         length_param = sizeof(esetup_info);
  482         error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &length_param, /*parmlen*/1,
  483                        (u_int8_t*)&esetup_info, sizeof(esetup_info),
  484                        DEFAULT_CMD_TIMEOUT);
  485         if (error != 0) {
  486                 return (error);
  487         }
  488         
  489         bt->bios_addr = esetup_info.bios_addr << 12;
  490 
  491         bt->mailbox_addrlimit = BUS_SPACE_MAXADDR;
  492         if (esetup_info.bus_type == 'A'
  493          && bt->firmware_ver[0] == '2') {
  494                 snprintf(bt->model, sizeof(bt->model), "542B");
  495         } else if (esetup_info.bus_type == 'E'
  496                 && bt->firmware_ver[0] == '2') {
  497 
  498                 /*
  499                  * The 742A seems to object if its mailboxes are
  500                  * allocated above the 16MB mark.
  501                  */
  502                 bt->mailbox_addrlimit = BUS_SPACE_MAXADDR_24BIT;
  503                 snprintf(bt->model, sizeof(bt->model), "742A");
  504         } else if (esetup_info.bus_type == 'E'
  505                 && bt->firmware_ver[0] == '') {
  506                 /* AMI FastDisk EISA Series 441 0.x */
  507                 snprintf(bt->model, sizeof(bt->model), "747A");
  508         } else {
  509                 ha_model_data_t model_data;
  510                 int i;
  511 
  512                 length_param = sizeof(model_data);
  513                 error = bt_cmd(bt, BOP_INQUIRE_MODEL, &length_param, 1,
  514                                (u_int8_t*)&model_data, sizeof(model_data),
  515                                DEFAULT_CMD_TIMEOUT);
  516                 if (error != 0) {
  517                         device_printf(dev,
  518                                       "bt_fetch_adapter_info - Failed Inquire "
  519                                       "Model Number\n");
  520                         return (error);
  521                 }
  522                 for (i = 0; i < sizeof(model_data.ascii_model); i++) {
  523                         bt->model[i] = model_data.ascii_model[i];
  524                         if (bt->model[i] == ' ')
  525                                 break;
  526                 }
  527                 bt->model[i] = '\0';
  528         }
  529 
  530         bt->level_trigger_ints = esetup_info.level_trigger_ints ? 1 : 0;
  531 
  532         /* SG element limits */
  533         bt->max_sg = esetup_info.max_sg;
  534 
  535         /* Set feature flags */
  536         bt->wide_bus = esetup_info.wide_bus;
  537         bt->diff_bus = esetup_info.diff_bus;
  538         bt->ultra_scsi = esetup_info.ultra_scsi;
  539 
  540         if ((bt->firmware_ver[0] == '5')
  541          || (bt->firmware_ver[0] == '4' && bt->wide_bus))
  542                 bt->extended_lun = TRUE;
  543 
  544         bt->strict_rr = (strcmp(bt->firmware_ver, "3.31") >= 0);
  545 
  546         bt->extended_trans =
  547             ((bt_inb(bt, GEOMETRY_REG) & EXTENDED_TRANSLATION) != 0);
  548 
  549         /*
  550          * Determine max CCB count and whether tagged queuing is
  551          * available based on controller type. Tagged queuing
  552          * only works on 'W' series adapters, 'C' series adapters
  553          * with firmware of rev 4.42 and higher, and 'S' series
  554          * adapters with firmware of rev 3.35 and higher.  The
  555          * maximum CCB counts are as follows:
  556          *
  557          *      192     BT-948/958/958D
  558          *      100     BT-946C/956C/956CD/747C/757C/757CD/445C
  559          *      50      BT-545C/540CF
  560          *      30      BT-747S/747D/757S/757D/445S/545S/542D/542B/742A
  561          */
  562         if (bt->firmware_ver[0] == '5') {
  563                 bt->max_ccbs = 192;
  564                 bt->tag_capable = TRUE;
  565         } else if (bt->firmware_ver[0] == '4') {
  566                 if (bt->model[0] == '5')
  567                         bt->max_ccbs = 50;
  568                 else
  569                         bt->max_ccbs = 100;
  570                 bt->tag_capable = (strcmp(bt->firmware_ver, "4.22") >= 0);
  571         } else {
  572                 bt->max_ccbs = 30;
  573                 if (bt->firmware_ver[0] == '3'
  574                  && (strcmp(bt->firmware_ver, "3.35") >= 0))
  575                         bt->tag_capable = TRUE;
  576                 else
  577                         bt->tag_capable = FALSE;
  578         }
  579 
  580         if (bt->tag_capable != FALSE)
  581                 bt->tags_permitted = ALL_TARGETS;
  582 
  583         /* Determine Sync/Wide/Disc settings */
  584         if (bt->firmware_ver[0] >= '4') {
  585                 auto_scsi_data_t auto_scsi_data;
  586                 fetch_lram_params_t fetch_lram_params;
  587                 int error;
  588                 
  589                 /*
  590                  * These settings are stored in the
  591                  * AutoSCSI data in LRAM of 'W' and 'C'
  592                  * adapters.
  593                  */
  594                 fetch_lram_params.offset = AUTO_SCSI_BYTE_OFFSET;
  595                 fetch_lram_params.response_len = sizeof(auto_scsi_data);
  596                 error = bt_cmd(bt, BOP_FETCH_LRAM,
  597                                (u_int8_t*)&fetch_lram_params,
  598                                sizeof(fetch_lram_params),
  599                                (u_int8_t*)&auto_scsi_data,
  600                                sizeof(auto_scsi_data), DEFAULT_CMD_TIMEOUT);
  601 
  602                 if (error != 0) {
  603                         device_printf(dev,
  604                                       "bt_fetch_adapter_info - Failed "
  605                                       "Get Auto SCSI Info\n");
  606                         return (error);
  607                 }
  608 
  609                 bt->disc_permitted = auto_scsi_data.low_disc_permitted
  610                                    | (auto_scsi_data.high_disc_permitted << 8);
  611                 bt->sync_permitted = auto_scsi_data.low_sync_permitted
  612                                    | (auto_scsi_data.high_sync_permitted << 8);
  613                 bt->fast_permitted = auto_scsi_data.low_fast_permitted
  614                                    | (auto_scsi_data.high_fast_permitted << 8);
  615                 bt->ultra_permitted = auto_scsi_data.low_ultra_permitted
  616                                    | (auto_scsi_data.high_ultra_permitted << 8);
  617                 bt->wide_permitted = auto_scsi_data.low_wide_permitted
  618                                    | (auto_scsi_data.high_wide_permitted << 8);
  619 
  620                 if (bt->ultra_scsi == FALSE)
  621                         bt->ultra_permitted = 0;
  622 
  623                 if (bt->wide_bus == FALSE)
  624                         bt->wide_permitted = 0;
  625         } else {
  626                 /*
  627                  * 'S' and 'A' series have this information in the setup
  628                  * information structure.
  629                  */
  630                 setup_data_t    setup_info;
  631 
  632                 length_param = sizeof(setup_info);
  633                 error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &length_param,
  634                                /*paramlen*/1, (u_int8_t*)&setup_info,
  635                                sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
  636 
  637                 if (error != 0) {
  638                         device_printf(dev,
  639                                       "bt_fetch_adapter_info - Failed "
  640                                       "Get Setup Info\n");
  641                         return (error);
  642                 }
  643 
  644                 if (setup_info.initiate_sync != 0) {
  645                         bt->sync_permitted = ALL_TARGETS;
  646 
  647                         if (bt->model[0] == '7') {
  648                                 if (esetup_info.sync_neg10MB != 0)
  649                                         bt->fast_permitted = ALL_TARGETS;
  650                                 if (strcmp(bt->model, "757") == 0)
  651                                         bt->wide_permitted = ALL_TARGETS;
  652                         }
  653                 }
  654                 bt->disc_permitted = ALL_TARGETS;
  655         }
  656 
  657         /* We need as many mailboxes as we can have ccbs */
  658         bt->num_boxes = bt->max_ccbs;
  659 
  660         /* Determine our SCSI ID */
  661         
  662         error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  663                        (u_int8_t*)&config_data, sizeof(config_data),
  664                        DEFAULT_CMD_TIMEOUT);
  665         if (error != 0) {
  666                 device_printf(dev,
  667                               "bt_fetch_adapter_info - Failed Get Config\n");
  668                 return (error);
  669         }
  670         bt->scsi_id = config_data.scsi_id;
  671 
  672         return (0);
  673 }
  674 
  675 /*
  676  * Start the board, ready for normal operation
  677  */
  678 int
  679 bt_init(device_t dev)
  680 {
  681         struct bt_softc *bt = device_get_softc(dev);
  682 
  683         /* Announce the Adapter */
  684         device_printf(dev, "BT-%s FW Rev. %s ", bt->model, bt->firmware_ver);
  685 
  686         if (bt->ultra_scsi != 0)
  687                 printf("Ultra ");
  688 
  689         if (bt->wide_bus != 0)
  690                 printf("Wide ");
  691         else
  692                 printf("Narrow ");
  693 
  694         if (bt->diff_bus != 0)
  695                 printf("Diff ");
  696 
  697         printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", bt->scsi_id,
  698                bt->max_ccbs);
  699 
  700         /*
  701          * Create our DMA tags.  These tags define the kinds of device
  702          * accessible memory allocations and memory mappings we will 
  703          * need to perform during normal operation.
  704          *
  705          * Unless we need to further restrict the allocation, we rely
  706          * on the restrictions of the parent dmat, hence the common
  707          * use of MAXADDR and MAXSIZE.
  708          */
  709 
  710         /* DMA tag for mapping buffers into device visible space. */
  711         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  712                                 /* alignment    */ 1,
  713                                 /* boundary     */ 0,
  714                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  715                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  716                                 /* filter       */ NULL,
  717                                 /* filterarg    */ NULL,
  718                                 /* maxsize      */ MAXBSIZE,
  719                                 /* nsegments    */ BT_NSEG,
  720                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  721                                 /* flags        */ BUS_DMA_ALLOCNOW,
  722                                 /* lockfunc     */ busdma_lock_mutex,
  723                                 /* lockarg      */ &Giant,
  724                                 &bt->buffer_dmat) != 0) {
  725                 goto error_exit;
  726         }
  727 
  728         bt->init_level++;
  729         /* DMA tag for our mailboxes */
  730         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  731                                 /* alignment    */ 1,
  732                                 /* boundary     */ 0,
  733                                 /* lowaddr      */ bt->mailbox_addrlimit,
  734                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  735                                 /* filter       */ NULL,
  736                                 /* filterarg    */ NULL,
  737                                 /* maxsize      */ bt->num_boxes *
  738                                                    (sizeof(bt_mbox_in_t) +
  739                                                     sizeof(bt_mbox_out_t)),
  740                                 /* nsegments    */ 1,
  741                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  742                                 /* flags        */ 0,
  743                                 /* lockfunc     */ busdma_lock_mutex,
  744                                 /* lockarg      */ &Giant,
  745                                 &bt->mailbox_dmat) != 0) {
  746                 goto error_exit;
  747         }
  748 
  749         bt->init_level++;
  750 
  751         /* Allocation for our mailboxes */
  752         if (bus_dmamem_alloc(bt->mailbox_dmat, (void **)&bt->out_boxes,
  753                              BUS_DMA_NOWAIT, &bt->mailbox_dmamap) != 0) {
  754                 goto error_exit;
  755         }
  756 
  757         bt->init_level++;
  758 
  759         /* And permanently map them */
  760         bus_dmamap_load(bt->mailbox_dmat, bt->mailbox_dmamap,
  761                         bt->out_boxes,
  762                         bt->num_boxes * (sizeof(bt_mbox_in_t)
  763                                        + sizeof(bt_mbox_out_t)),
  764                         btmapmboxes, bt, /*flags*/0);
  765 
  766         bt->init_level++;
  767 
  768         bt->in_boxes = (bt_mbox_in_t *)&bt->out_boxes[bt->num_boxes];
  769 
  770         btinitmboxes(bt);
  771 
  772         /* DMA tag for our ccb structures */
  773         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  774                                 /* alignment    */ 1,
  775                                 /* boundary     */ 0,
  776                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  777                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  778                                 /* filter       */ NULL,
  779                                 /* filterarg    */ NULL,
  780                                 /* maxsize      */ bt->max_ccbs *
  781                                                    sizeof(struct bt_ccb),
  782                                 /* nsegments    */ 1,
  783                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  784                                 /* flags        */ 0,
  785                                 /* lockfunc     */ busdma_lock_mutex,
  786                                 /* lockarg      */ &Giant,
  787                                 &bt->ccb_dmat) != 0) {
  788                 goto error_exit;
  789         }
  790 
  791         bt->init_level++;
  792 
  793         /* Allocation for our ccbs */
  794         if (bus_dmamem_alloc(bt->ccb_dmat, (void **)&bt->bt_ccb_array,
  795                              BUS_DMA_NOWAIT, &bt->ccb_dmamap) != 0) {
  796                 goto error_exit;
  797         }
  798 
  799         bt->init_level++;
  800 
  801         /* And permanently map them */
  802         bus_dmamap_load(bt->ccb_dmat, bt->ccb_dmamap,
  803                         bt->bt_ccb_array,
  804                         bt->max_ccbs * sizeof(struct bt_ccb),
  805                         btmapccbs, bt, /*flags*/0);
  806 
  807         bt->init_level++;
  808 
  809         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
  810         if (bus_dma_tag_create( /* parent       */ bt->parent_dmat,
  811                                 /* alignment    */ 1,
  812                                 /* boundary     */ 0,
  813                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  814                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  815                                 /* filter       */ NULL,
  816                                 /* filterarg    */ NULL,
  817                                 /* maxsize      */ PAGE_SIZE,
  818                                 /* nsegments    */ 1,
  819                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  820                                 /* flags        */ 0,
  821                                 /* lockfunc     */ busdma_lock_mutex,
  822                                 /* lockarg      */ &Giant,
  823                                 &bt->sg_dmat) != 0) {
  824                 goto error_exit;
  825         }
  826 
  827         bt->init_level++;
  828 
  829         /* Perform initial CCB allocation */
  830         bzero(bt->bt_ccb_array, bt->max_ccbs * sizeof(struct bt_ccb));
  831         btallocccbs(bt);
  832 
  833         if (bt->num_ccbs == 0) {
  834                 device_printf(dev,
  835                               "bt_init - Unable to allocate initial ccbs\n");
  836                 goto error_exit;
  837         }
  838 
  839         /*
  840          * Note that we are going and return (to probe)
  841          */
  842         return 0;
  843 
  844 error_exit:
  845 
  846         return (ENXIO);
  847 }
  848 
  849 int
  850 bt_attach(device_t dev)
  851 {
  852         struct bt_softc *bt = device_get_softc(dev);
  853         int tagged_dev_openings;
  854         struct cam_devq *devq;
  855         int error;
  856 
  857         /*
  858          * We reserve 1 ccb for error recovery, so don't
  859          * tell the XPT about it.
  860          */
  861         if (bt->tag_capable != 0)
  862                 tagged_dev_openings = bt->max_ccbs - 1;
  863         else
  864                 tagged_dev_openings = 0;
  865 
  866         /*
  867          * Create the device queue for our SIM.
  868          */
  869         devq = cam_simq_alloc(bt->max_ccbs - 1);
  870         if (devq == NULL)
  871                 return (ENOMEM);
  872 
  873         /*
  874          * Construct our SIM entry
  875          */
  876         bt->sim = cam_sim_alloc(btaction, btpoll, "bt", bt, bt->unit,
  877                                 &Giant, 2, tagged_dev_openings, devq);
  878         if (bt->sim == NULL) {
  879                 cam_simq_free(devq);
  880                 return (ENOMEM);
  881         }
  882         
  883         if (xpt_bus_register(bt->sim, dev, 0) != CAM_SUCCESS) {
  884                 cam_sim_free(bt->sim, /*free_devq*/TRUE);
  885                 return (ENXIO);
  886         }
  887         
  888         if (xpt_create_path(&bt->path, /*periph*/NULL,
  889                             cam_sim_path(bt->sim), CAM_TARGET_WILDCARD,
  890                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  891                 xpt_bus_deregister(cam_sim_path(bt->sim));
  892                 cam_sim_free(bt->sim, /*free_devq*/TRUE);
  893                 return (ENXIO);
  894         }
  895                 
  896         /*
  897          * Setup interrupt.
  898          */
  899         error = bus_setup_intr(dev, bt->irq, INTR_TYPE_CAM|INTR_ENTROPY, NULL,
  900                                bt_intr, bt, &bt->ih);
  901         if (error) {
  902                 device_printf(dev, "bus_setup_intr() failed: %d\n", error);
  903                 return (error);
  904         }
  905 
  906         return (0);
  907 }
  908 
  909 int
  910 bt_check_probed_iop(u_int ioport)
  911 {
  912         u_int i;
  913 
  914         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
  915                 if (bt_isa_ports[i].addr == ioport) {
  916                         if (bt_isa_ports[i].probed != 0)
  917                                 return (1);
  918                         else {
  919                                 return (0);
  920                         }
  921                 }
  922         }
  923         return (1);
  924 }
  925 
  926 void
  927 bt_mark_probed_bio(isa_compat_io_t port)
  928 {
  929         if (port < BIO_DISABLED)
  930                 bt_mark_probed_iop(bt_board_ports[port]);
  931 }
  932 
  933 void
  934 bt_mark_probed_iop(u_int ioport)
  935 {
  936         u_int i;
  937 
  938         for (i = 0; i < BT_NUM_ISAPORTS; i++) {
  939                 if (ioport == bt_isa_ports[i].addr) {
  940                         bt_isa_ports[i].probed = 1;
  941                         break;
  942                 }
  943         }
  944 }
  945 
  946 void
  947 bt_find_probe_range(int ioport, int *port_index, int *max_port_index)
  948 {
  949         if (ioport > 0) {
  950                 int i;
  951 
  952                 for (i = 0;i < BT_NUM_ISAPORTS; i++)
  953                         if (ioport <= bt_isa_ports[i].addr)
  954                                 break;
  955                 if ((i >= BT_NUM_ISAPORTS)
  956                  || (ioport != bt_isa_ports[i].addr)) {
  957                         printf(
  958 "bt_find_probe_range: Invalid baseport of 0x%x specified.\n"
  959 "bt_find_probe_range: Nearest valid baseport is 0x%x.\n"
  960 "bt_find_probe_range: Failing probe.\n",
  961                                ioport,
  962                                (i < BT_NUM_ISAPORTS)
  963                                     ? bt_isa_ports[i].addr
  964                                     : bt_isa_ports[BT_NUM_ISAPORTS - 1].addr);
  965                         *port_index = *max_port_index = -1;
  966                         return;
  967                 }
  968                 *port_index = *max_port_index = bt_isa_ports[i].bio;
  969         } else {
  970                 *port_index = 0;
  971                 *max_port_index = BT_NUM_ISAPORTS - 1;
  972         }
  973 }
  974 
  975 int
  976 bt_iop_from_bio(isa_compat_io_t bio_index)
  977 {
  978         if (bio_index >= 0 && bio_index < BT_NUM_ISAPORTS)
  979                 return (bt_board_ports[bio_index]);
  980         return (-1);
  981 }
  982 
  983 
  984 static void
  985 btallocccbs(struct bt_softc *bt)
  986 {
  987         struct bt_ccb *next_ccb;
  988         struct sg_map_node *sg_map;
  989         bus_addr_t physaddr;
  990         bt_sg_t *segs;
  991         int newcount;
  992         int i;
  993 
  994         if (bt->num_ccbs >= bt->max_ccbs)
  995                 /* Can't allocate any more */
  996                 return;
  997 
  998         next_ccb = &bt->bt_ccb_array[bt->num_ccbs];
  999 
 1000         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
 1001 
 1002         if (sg_map == NULL)
 1003                 goto error_exit;
 1004 
 1005         /* Allocate S/G space for the next batch of CCBS */
 1006         if (bus_dmamem_alloc(bt->sg_dmat, (void **)&sg_map->sg_vaddr,
 1007                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 1008                 free(sg_map, M_DEVBUF);
 1009                 goto error_exit;
 1010         }
 1011 
 1012         SLIST_INSERT_HEAD(&bt->sg_maps, sg_map, links);
 1013 
 1014         bus_dmamap_load(bt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 1015                         PAGE_SIZE, btmapsgs, bt, /*flags*/0);
 1016         
 1017         segs = sg_map->sg_vaddr;
 1018         physaddr = sg_map->sg_physaddr;
 1019 
 1020         newcount = (PAGE_SIZE / (BT_NSEG * sizeof(bt_sg_t)));
 1021         for (i = 0; bt->num_ccbs < bt->max_ccbs && i < newcount; i++) {
 1022                 int error;
 1023 
 1024                 next_ccb->sg_list = segs;
 1025                 next_ccb->sg_list_phys = physaddr;
 1026                 next_ccb->flags = BCCB_FREE;
 1027                 error = bus_dmamap_create(bt->buffer_dmat, /*flags*/0,
 1028                                           &next_ccb->dmamap);
 1029                 if (error != 0)
 1030                         break;
 1031                 SLIST_INSERT_HEAD(&bt->free_bt_ccbs, next_ccb, links);
 1032                 segs += BT_NSEG;
 1033                 physaddr += (BT_NSEG * sizeof(bt_sg_t));
 1034                 next_ccb++;
 1035                 bt->num_ccbs++;
 1036         }
 1037 
 1038         /* Reserve a CCB for error recovery */
 1039         if (bt->recovery_bccb == NULL) {
 1040                 bt->recovery_bccb = SLIST_FIRST(&bt->free_bt_ccbs);
 1041                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1042         }
 1043 
 1044         if (SLIST_FIRST(&bt->free_bt_ccbs) != NULL)
 1045                 return;
 1046 
 1047 error_exit:
 1048         device_printf(bt->dev, "Can't malloc BCCBs\n");
 1049 }
 1050 
 1051 static __inline void
 1052 btfreeccb(struct bt_softc *bt, struct bt_ccb *bccb)
 1053 {
 1054         int s;
 1055 
 1056         s = splcam();
 1057         if ((bccb->flags & BCCB_ACTIVE) != 0)
 1058                 LIST_REMOVE(&bccb->ccb->ccb_h, sim_links.le);
 1059         if (bt->resource_shortage != 0
 1060          && (bccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
 1061                 bccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1062                 bt->resource_shortage = FALSE;
 1063         }
 1064         bccb->flags = BCCB_FREE;
 1065         SLIST_INSERT_HEAD(&bt->free_bt_ccbs, bccb, links);
 1066         bt->active_ccbs--;
 1067         splx(s);
 1068 }
 1069 
 1070 static __inline struct bt_ccb*
 1071 btgetccb(struct bt_softc *bt)
 1072 {
 1073         struct  bt_ccb* bccb;
 1074         int     s;
 1075 
 1076         s = splcam();
 1077         if ((bccb = SLIST_FIRST(&bt->free_bt_ccbs)) != NULL) {
 1078                 SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1079                 bt->active_ccbs++;
 1080         } else {
 1081                 btallocccbs(bt);
 1082                 bccb = SLIST_FIRST(&bt->free_bt_ccbs);
 1083                 if (bccb != NULL) {
 1084                         SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
 1085                         bt->active_ccbs++;
 1086                 }
 1087         }
 1088         splx(s);
 1089 
 1090         return (bccb);
 1091 }
 1092 
 1093 static void
 1094 btaction(struct cam_sim *sim, union ccb *ccb)
 1095 {
 1096         struct  bt_softc *bt;
 1097 
 1098         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("btaction\n"));
 1099         
 1100         bt = (struct bt_softc *)cam_sim_softc(sim);
 1101         
 1102         switch (ccb->ccb_h.func_code) {
 1103         /* Common cases first */
 1104         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 1105         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 1106         {
 1107                 struct  bt_ccb  *bccb;
 1108                 struct  bt_hccb *hccb;
 1109 
 1110                 /*
 1111                  * get a bccb to use.
 1112                  */
 1113                 if ((bccb = btgetccb(bt)) == NULL) {
 1114                         int s;
 1115 
 1116                         s = splcam();
 1117                         bt->resource_shortage = TRUE;
 1118                         splx(s);
 1119                         xpt_freeze_simq(bt->sim, /*count*/1);
 1120                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1121                         xpt_done(ccb);
 1122                         return;
 1123                 }
 1124                 
 1125                 hccb = &bccb->hccb;
 1126 
 1127                 /*
 1128                  * So we can find the BCCB when an abort is requested
 1129                  */
 1130                 bccb->ccb = ccb;
 1131                 ccb->ccb_h.ccb_bccb_ptr = bccb;
 1132                 ccb->ccb_h.ccb_bt_ptr = bt;
 1133 
 1134                 /*
 1135                  * Put all the arguments for the xfer in the bccb
 1136                  */
 1137                 hccb->target_id = ccb->ccb_h.target_id;
 1138                 hccb->target_lun = ccb->ccb_h.target_lun;
 1139                 hccb->btstat = 0;
 1140                 hccb->sdstat = 0;
 1141 
 1142                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
 1143                         struct ccb_scsiio *csio;
 1144                         struct ccb_hdr *ccbh;
 1145 
 1146                         csio = &ccb->csio;
 1147                         ccbh = &csio->ccb_h;
 1148                         hccb->opcode = INITIATOR_CCB_WRESID;
 1149                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
 1150                         hccb->dataout =(ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
 1151                         hccb->cmd_len = csio->cdb_len;
 1152                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
 1153                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1154                                 btfreeccb(bt, bccb);
 1155                                 xpt_done(ccb);
 1156                                 return;
 1157                         }
 1158                         hccb->sense_len = csio->sense_len;
 1159                         if ((ccbh->flags & CAM_TAG_ACTION_VALID) != 0
 1160                          && ccb->csio.tag_action != CAM_TAG_ACTION_NONE) {
 1161                                 hccb->tag_enable = TRUE;
 1162                                 hccb->tag_type = (ccb->csio.tag_action & 0x3);
 1163                         } else {
 1164                                 hccb->tag_enable = FALSE;
 1165                                 hccb->tag_type = 0;
 1166                         }
 1167                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
 1168                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
 1169                                         bcopy(csio->cdb_io.cdb_ptr,
 1170                                               hccb->scsi_cdb, hccb->cmd_len);
 1171                                 } else {
 1172                                         /* I guess I could map it in... */
 1173                                         ccbh->status = CAM_REQ_INVALID;
 1174                                         btfreeccb(bt, bccb);
 1175                                         xpt_done(ccb);
 1176                                         return;
 1177                                 }
 1178                         } else {
 1179                                 bcopy(csio->cdb_io.cdb_bytes,
 1180                                       hccb->scsi_cdb, hccb->cmd_len);
 1181                         }
 1182                         /* If need be, bounce our sense buffer */
 1183                         if (bt->sense_buffers != NULL) {
 1184                                 hccb->sense_addr = btsensepaddr(bt, bccb);
 1185                         } else {
 1186                                 hccb->sense_addr = vtophys(&csio->sense_data);
 1187                         }
 1188                         /*
 1189                          * If we have any data to send with this command,
 1190                          * map it into bus space.
 1191                          */
 1192                         /* Only use S/G if there is a transfer */
 1193                         if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1194                                 if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
 1195                                         /*
 1196                                          * We've been given a pointer
 1197                                          * to a single buffer.
 1198                                          */
 1199                                         if ((ccbh->flags & CAM_DATA_PHYS)==0) {
 1200                                                 int s;
 1201                                                 int error;
 1202 
 1203                                                 s = splsoftvm();
 1204                                                 error = bus_dmamap_load(
 1205                                                     bt->buffer_dmat,
 1206                                                     bccb->dmamap,
 1207                                                     csio->data_ptr,
 1208                                                     csio->dxfer_len,
 1209                                                     btexecuteccb,
 1210                                                     bccb,
 1211                                                     /*flags*/0);
 1212                                                 if (error == EINPROGRESS) {
 1213                                                         /*
 1214                                                          * So as to maintain
 1215                                                          * ordering, freeze the
 1216                                                          * controller queue
 1217                                                          * until our mapping is
 1218                                                          * returned.
 1219                                                          */
 1220                                                         xpt_freeze_simq(bt->sim,
 1221                                                                         1);
 1222                                                         csio->ccb_h.status |=
 1223                                                             CAM_RELEASE_SIMQ;
 1224                                                 }
 1225                                                 splx(s);
 1226                                         } else {
 1227                                                 struct bus_dma_segment seg; 
 1228 
 1229                                                 /* Pointer to physical buffer */
 1230                                                 seg.ds_addr =
 1231                                                     (bus_addr_t)csio->data_ptr;
 1232                                                 seg.ds_len = csio->dxfer_len;
 1233                                                 btexecuteccb(bccb, &seg, 1, 0);
 1234                                         }
 1235                                 } else {
 1236                                         struct bus_dma_segment *segs;
 1237 
 1238                                         if ((ccbh->flags & CAM_DATA_PHYS) != 0)
 1239                                                 panic("btaction - Physical "
 1240                                                       "segment pointers "
 1241                                                       "unsupported");
 1242 
 1243                                         if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
 1244                                                 panic("btaction - Virtual "
 1245                                                       "segment addresses "
 1246                                                       "unsupported");
 1247 
 1248                                         /* Just use the segments provided */
 1249                                         segs = (struct bus_dma_segment *)
 1250                                             csio->data_ptr;
 1251                                         btexecuteccb(bccb, segs,
 1252                                                      csio->sglist_cnt, 0);
 1253                                 }
 1254                         } else {
 1255                                 btexecuteccb(bccb, NULL, 0, 0);
 1256                         }
 1257                 } else {
 1258                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
 1259                         /* No data transfer */
 1260                         hccb->datain = TRUE;
 1261                         hccb->dataout = TRUE;
 1262                         hccb->cmd_len = 0;
 1263                         hccb->sense_len = 0;
 1264                         hccb->tag_enable = FALSE;
 1265                         hccb->tag_type = 0;
 1266                         btexecuteccb(bccb, NULL, 0, 0);
 1267                 }
 1268                 break;
 1269         }
 1270         case XPT_EN_LUN:                /* Enable LUN as a target */
 1271         case XPT_TARGET_IO:             /* Execute target I/O request */
 1272         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
 1273         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
 1274         case XPT_ABORT:                 /* Abort the specified CCB */
 1275                 /* XXX Implement */
 1276                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1277                 xpt_done(ccb);
 1278                 break;
 1279         case XPT_SET_TRAN_SETTINGS:
 1280         {
 1281                 /* XXX Implement */
 1282                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
 1283                 xpt_done(ccb);
 1284                 break;
 1285         }
 1286         case XPT_GET_TRAN_SETTINGS:
 1287         /* Get default/user set transfer settings for the target */
 1288         {
 1289                 struct  ccb_trans_settings *cts;
 1290                 u_int   target_mask;
 1291 
 1292                 cts = &ccb->cts;
 1293                 target_mask = 0x01 << ccb->ccb_h.target_id;
 1294                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
 1295                         struct ccb_trans_settings_scsi *scsi =
 1296                             &cts->proto_specific.scsi;
 1297                         struct ccb_trans_settings_spi *spi =
 1298                             &cts->xport_specific.spi;
 1299                         cts->protocol = PROTO_SCSI;
 1300                         cts->protocol_version = SCSI_REV_2;
 1301                         cts->transport = XPORT_SPI;
 1302                         cts->transport_version = 2;
 1303 
 1304                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
 1305                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
 1306 
 1307                         if ((bt->disc_permitted & target_mask) != 0)
 1308                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
 1309                         if ((bt->tags_permitted & target_mask) != 0)
 1310                                 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
 1311 
 1312                         if ((bt->ultra_permitted & target_mask) != 0)
 1313                                 spi->sync_period = 12;
 1314                         else if ((bt->fast_permitted & target_mask) != 0)
 1315                                 spi->sync_period = 25;
 1316                         else if ((bt->sync_permitted & target_mask) != 0)
 1317                                 spi->sync_period = 50;
 1318                         else
 1319                                 spi->sync_period = 0;
 1320 
 1321                         if (spi->sync_period != 0)
 1322                                 spi->sync_offset = 15;
 1323 
 1324                         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
 1325                         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
 1326 
 1327                         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
 1328                         if ((bt->wide_permitted & target_mask) != 0)
 1329                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 1330                         else
 1331                                 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 1332 
 1333                         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 1334                                 scsi->valid = CTS_SCSI_VALID_TQ;
 1335                                 spi->valid |= CTS_SPI_VALID_DISC;
 1336                         } else
 1337                                 scsi->valid = 0;
 1338                 } else {
 1339                         btfetchtransinfo(bt, cts);
 1340                 }
 1341 
 1342                 ccb->ccb_h.status = CAM_REQ_CMP;
 1343                 xpt_done(ccb);
 1344                 break;
 1345         }
 1346         case XPT_CALC_GEOMETRY:
 1347         {
 1348                 struct    ccb_calc_geometry *ccg;
 1349                 u_int32_t size_mb;
 1350                 u_int32_t secs_per_cylinder;
 1351 
 1352                 ccg = &ccb->ccg;
 1353                 size_mb = ccg->volume_size
 1354                         / ((1024L * 1024L) / ccg->block_size);
 1355                 
 1356                 if (size_mb >= 1024 && (bt->extended_trans != 0)) {
 1357                         if (size_mb >= 2048) {
 1358                                 ccg->heads = 255;
 1359                                 ccg->secs_per_track = 63;
 1360                         } else {
 1361                                 ccg->heads = 128;
 1362                                 ccg->secs_per_track = 32;
 1363                         }
 1364                 } else {
 1365                         ccg->heads = 64;
 1366                         ccg->secs_per_track = 32;
 1367                 }
 1368                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 1369                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 1370                 ccb->ccb_h.status = CAM_REQ_CMP;
 1371                 xpt_done(ccb);
 1372                 break;
 1373         }
 1374         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
 1375         {
 1376                 btreset(bt, /*hardreset*/TRUE);
 1377                 ccb->ccb_h.status = CAM_REQ_CMP;
 1378                 xpt_done(ccb);
 1379                 break;
 1380         }
 1381         case XPT_TERM_IO:               /* Terminate the I/O process */
 1382                 /* XXX Implement */
 1383                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1384                 xpt_done(ccb);
 1385                 break;
 1386         case XPT_PATH_INQ:              /* Path routing inquiry */
 1387         {
 1388                 struct ccb_pathinq *cpi = &ccb->cpi;
 1389                 
 1390                 cpi->version_num = 1; /* XXX??? */
 1391                 cpi->hba_inquiry = PI_SDTR_ABLE;
 1392                 if (bt->tag_capable != 0)
 1393                         cpi->hba_inquiry |= PI_TAG_ABLE;
 1394                 if (bt->wide_bus != 0)
 1395                         cpi->hba_inquiry |= PI_WIDE_16;
 1396                 cpi->target_sprt = 0;
 1397                 cpi->hba_misc = 0;
 1398                 cpi->hba_eng_cnt = 0;
 1399                 cpi->max_target = bt->wide_bus ? 15 : 7;
 1400                 cpi->max_lun = 7;
 1401                 cpi->initiator_id = bt->scsi_id;
 1402                 cpi->bus_id = cam_sim_bus(sim);
 1403                 cpi->base_transfer_speed = 3300;
 1404                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 1405                 strncpy(cpi->hba_vid, "BusLogic", HBA_IDLEN);
 1406                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 1407                 cpi->unit_number = cam_sim_unit(sim);
 1408                 cpi->ccb_h.status = CAM_REQ_CMP;
 1409                 cpi->transport = XPORT_SPI;
 1410                 cpi->transport_version = 2;
 1411                 cpi->protocol = PROTO_SCSI;
 1412                 cpi->protocol_version = SCSI_REV_2;
 1413                 xpt_done(ccb);
 1414                 break;
 1415         }
 1416         default:
 1417                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1418                 xpt_done(ccb);
 1419                 break;
 1420         }
 1421 }
 1422 
 1423 static void
 1424 btexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1425 {
 1426         struct   bt_ccb *bccb;
 1427         union    ccb *ccb;
 1428         struct   bt_softc *bt;
 1429         int      s;
 1430 
 1431         bccb = (struct bt_ccb *)arg;
 1432         ccb = bccb->ccb;
 1433         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
 1434 
 1435         if (error != 0) {
 1436                 if (error != EFBIG)
 1437                         device_printf(bt->dev,
 1438                                       "Unexepected error 0x%x returned from "
 1439                                       "bus_dmamap_load\n", error);
 1440                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 1441                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1442                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 1443                 }
 1444                 btfreeccb(bt, bccb);
 1445                 xpt_done(ccb);
 1446                 return;
 1447         }
 1448                 
 1449         if (nseg != 0) {
 1450                 bt_sg_t *sg;
 1451                 bus_dma_segment_t *end_seg;
 1452                 bus_dmasync_op_t op;
 1453 
 1454                 end_seg = dm_segs + nseg;
 1455 
 1456                 /* Copy the segments into our SG list */
 1457                 sg = bccb->sg_list;
 1458                 while (dm_segs < end_seg) {
 1459                         sg->len = dm_segs->ds_len;
 1460                         sg->addr = dm_segs->ds_addr;
 1461                         sg++;
 1462                         dm_segs++;
 1463                 }
 1464 
 1465                 if (nseg > 1) {
 1466                         bccb->hccb.opcode = INITIATOR_SG_CCB_WRESID;
 1467                         bccb->hccb.data_len = sizeof(bt_sg_t) * nseg;
 1468                         bccb->hccb.data_addr = bccb->sg_list_phys;
 1469                 } else {
 1470                         bccb->hccb.data_len = bccb->sg_list->len;
 1471                         bccb->hccb.data_addr = bccb->sg_list->addr;
 1472                 }
 1473 
 1474                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1475                         op = BUS_DMASYNC_PREREAD;
 1476                 else
 1477                         op = BUS_DMASYNC_PREWRITE;
 1478 
 1479                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
 1480 
 1481         } else {
 1482                 bccb->hccb.opcode = INITIATOR_CCB;
 1483                 bccb->hccb.data_len = 0;
 1484                 bccb->hccb.data_addr = 0;
 1485         }
 1486 
 1487         s = splcam();
 1488 
 1489         /*
 1490          * Last time we need to check if this CCB needs to
 1491          * be aborted.
 1492          */
 1493         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 1494                 if (nseg != 0)
 1495                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1496                 btfreeccb(bt, bccb);
 1497                 xpt_done(ccb);
 1498                 splx(s);
 1499                 return;
 1500         }
 1501                 
 1502         bccb->flags = BCCB_ACTIVE;
 1503         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1504         LIST_INSERT_HEAD(&bt->pending_ccbs, &ccb->ccb_h, sim_links.le);
 1505 
 1506         ccb->ccb_h.timeout_ch =
 1507             timeout(bttimeout, (caddr_t)bccb,
 1508                     (ccb->ccb_h.timeout * hz) / 1000);
 1509 
 1510         /* Tell the adapter about this command */
 1511         bt->cur_outbox->ccb_addr = btccbvtop(bt, bccb);
 1512         if (bt->cur_outbox->action_code != BMBO_FREE) {
 1513                 /*
 1514                  * We should never encounter a busy mailbox.
 1515                  * If we do, warn the user, and treat it as
 1516                  * a resource shortage.  If the controller is
 1517                  * hung, one of the pending transactions will
 1518                  * timeout causing us to start recovery operations.
 1519                  */
 1520                 device_printf(bt->dev,
 1521                               "Encountered busy mailbox with %d out of %d "
 1522                               "commands active!!!\n", bt->active_ccbs,
 1523                               bt->max_ccbs);
 1524                 untimeout(bttimeout, bccb, ccb->ccb_h.timeout_ch);
 1525                 if (nseg != 0)
 1526                         bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1527                 btfreeccb(bt, bccb);
 1528                 bt->resource_shortage = TRUE;
 1529                 xpt_freeze_simq(bt->sim, /*count*/1);
 1530                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1531                 xpt_done(ccb);
 1532                 return;
 1533         }
 1534         bt->cur_outbox->action_code = BMBO_START;       
 1535         bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
 1536         btnextoutbox(bt);
 1537         splx(s);
 1538 }
 1539 
 1540 void
 1541 bt_intr(void *arg)
 1542 {
 1543         struct  bt_softc *bt;
 1544         u_int   intstat;
 1545 
 1546         bt = (struct bt_softc *)arg;
 1547         while (((intstat = bt_inb(bt, INTSTAT_REG)) & INTR_PENDING) != 0) {
 1548 
 1549                 if ((intstat & CMD_COMPLETE) != 0) {
 1550                         bt->latched_status = bt_inb(bt, STATUS_REG);
 1551                         bt->command_cmp = TRUE;
 1552                 }
 1553 
 1554                 bt_outb(bt, CONTROL_REG, RESET_INTR);
 1555 
 1556                 if ((intstat & IMB_LOADED) != 0) {
 1557                         while (bt->cur_inbox->comp_code != BMBI_FREE) {
 1558                                 btdone(bt,
 1559                                        btccbptov(bt, bt->cur_inbox->ccb_addr),
 1560                                        bt->cur_inbox->comp_code);
 1561                                 bt->cur_inbox->comp_code = BMBI_FREE;
 1562                                 btnextinbox(bt);
 1563                         }
 1564                 }
 1565 
 1566                 if ((intstat & SCSI_BUS_RESET) != 0) {
 1567                         btreset(bt, /*hardreset*/FALSE);
 1568                 }
 1569         }
 1570 }
 1571 
 1572 static void
 1573 btdone(struct bt_softc *bt, struct bt_ccb *bccb, bt_mbi_comp_code_t comp_code)
 1574 {
 1575         union  ccb        *ccb;
 1576         struct ccb_scsiio *csio;
 1577 
 1578         ccb = bccb->ccb;
 1579         csio = &bccb->ccb->csio;
 1580 
 1581         if ((bccb->flags & BCCB_ACTIVE) == 0) {
 1582                 device_printf(bt->dev,
 1583                               "btdone - Attempt to free non-active BCCB %p\n",
 1584                               (void *)bccb);
 1585                 return;
 1586         }
 1587 
 1588         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1589                 bus_dmasync_op_t op;
 1590 
 1591                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1592                         op = BUS_DMASYNC_POSTREAD;
 1593                 else
 1594                         op = BUS_DMASYNC_POSTWRITE;
 1595                 bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
 1596                 bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
 1597         }
 1598 
 1599         if (bccb == bt->recovery_bccb) {
 1600                 /*
 1601                  * The recovery BCCB does not have a CCB associated
 1602                  * with it, so short circuit the normal error handling.
 1603                  * We now traverse our list of pending CCBs and process
 1604                  * any that were terminated by the recovery CCBs action.
 1605                  * We also reinstate timeouts for all remaining, pending,
 1606                  * CCBs.
 1607                  */
 1608                 struct cam_path *path;
 1609                 struct ccb_hdr *ccb_h;
 1610                 cam_status error;
 1611 
 1612                 /* Notify all clients that a BDR occured */
 1613                 error = xpt_create_path(&path, /*periph*/NULL,
 1614                                         cam_sim_path(bt->sim),
 1615                                         bccb->hccb.target_id,
 1616                                         CAM_LUN_WILDCARD);
 1617                 
 1618                 if (error == CAM_REQ_CMP)
 1619                         xpt_async(AC_SENT_BDR, path, NULL);
 1620 
 1621                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
 1622                 while (ccb_h != NULL) {
 1623                         struct bt_ccb *pending_bccb;
 1624 
 1625                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 1626                         if (pending_bccb->hccb.target_id
 1627                          == bccb->hccb.target_id) {
 1628                                 pending_bccb->hccb.btstat = BTSTAT_HA_BDR;
 1629                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1630                                 btdone(bt, pending_bccb, BMBI_ERROR);
 1631                         } else {
 1632                                 ccb_h->timeout_ch =
 1633                                     timeout(bttimeout, (caddr_t)pending_bccb,
 1634                                             (ccb_h->timeout * hz) / 1000);
 1635                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1636                         }
 1637                 }
 1638                 device_printf(bt->dev, "No longer in timeout\n");
 1639                 return;
 1640         }
 1641 
 1642         untimeout(bttimeout, bccb, ccb->ccb_h.timeout_ch);
 1643 
 1644         switch (comp_code) {
 1645         case BMBI_FREE:
 1646                 device_printf(bt->dev,
 1647                               "btdone - CCB completed with free status!\n");
 1648                 break;
 1649         case BMBI_NOT_FOUND:
 1650                 device_printf(bt->dev,
 1651                               "btdone - CCB Abort failed to find CCB\n");
 1652                 break;
 1653         case BMBI_ABORT:
 1654         case BMBI_ERROR:
 1655                 if (bootverbose) {
 1656                         printf("bt: ccb %p - error %x occured.  "
 1657                                "btstat = %x, sdstat = %x\n",
 1658                                (void *)bccb, comp_code, bccb->hccb.btstat,
 1659                                bccb->hccb.sdstat);
 1660                 }
 1661                 /* An error occured */
 1662                 switch(bccb->hccb.btstat) {
 1663                 case BTSTAT_DATARUN_ERROR:
 1664                         if (bccb->hccb.data_len == 0) {
 1665                                 /*
 1666                                  * At least firmware 4.22, does this
 1667                                  * for a QUEUE FULL condition.
 1668                                  */
 1669                                 bccb->hccb.sdstat = SCSI_STATUS_QUEUE_FULL;
 1670                         } else if (bccb->hccb.data_len < 0) {
 1671                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
 1672                                 break;
 1673                         }
 1674                         /* FALLTHROUGH */
 1675                 case BTSTAT_NOERROR:
 1676                 case BTSTAT_LINKED_CMD_COMPLETE:
 1677                 case BTSTAT_LINKED_CMD_FLAG_COMPLETE:
 1678                 case BTSTAT_DATAUNDERUN_ERROR:
 1679 
 1680                         csio->scsi_status = bccb->hccb.sdstat;
 1681                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 1682                         switch(csio->scsi_status) {
 1683                         case SCSI_STATUS_CHECK_COND:
 1684                         case SCSI_STATUS_CMD_TERMINATED:
 1685                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 1686                                 /* Bounce sense back if necessary */
 1687                                 if (bt->sense_buffers != NULL) {
 1688                                         csio->sense_data =
 1689                                             *btsensevaddr(bt, bccb);
 1690                                 }
 1691                                 break;
 1692                         default:
 1693                                 break;
 1694                         case SCSI_STATUS_OK:
 1695                                 csio->ccb_h.status = CAM_REQ_CMP;
 1696                                 break;
 1697                         }
 1698                         csio->resid = bccb->hccb.data_len;
 1699                         break;
 1700                 case BTSTAT_SELTIMEOUT:
 1701                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
 1702                         break;
 1703                 case BTSTAT_UNEXPECTED_BUSFREE:
 1704                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
 1705                         break;
 1706                 case BTSTAT_INVALID_PHASE:
 1707                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
 1708                         break;
 1709                 case BTSTAT_INVALID_ACTION_CODE:
 1710                         panic("%s: Inavlid Action code", bt_name(bt));
 1711                         break;
 1712                 case BTSTAT_INVALID_OPCODE:
 1713                         panic("%s: Inavlid CCB Opcode code", bt_name(bt));
 1714                         break;
 1715                 case BTSTAT_LINKED_CCB_LUN_MISMATCH:
 1716                         /* We don't even support linked commands... */
 1717                         panic("%s: Linked CCB Lun Mismatch", bt_name(bt));
 1718                         break;
 1719                 case BTSTAT_INVALID_CCB_OR_SG_PARAM:
 1720                         panic("%s: Invalid CCB or SG list", bt_name(bt));
 1721                         break;
 1722                 case BTSTAT_AUTOSENSE_FAILED:
 1723                         csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
 1724                         break;
 1725                 case BTSTAT_TAGGED_MSG_REJECTED:
 1726                 {
 1727                         struct ccb_trans_settings neg; 
 1728                         struct ccb_trans_settings_scsi *scsi =
 1729                             &neg.proto_specific.scsi;
 1730 
 1731                         neg.protocol = PROTO_SCSI;
 1732                         neg.protocol_version = SCSI_REV_2;
 1733                         neg.transport = XPORT_SPI;
 1734                         neg.transport_version = 2;
 1735                         scsi->valid = CTS_SCSI_VALID_TQ;
 1736                         scsi->flags = 0;
 1737                         xpt_print_path(csio->ccb_h.path);
 1738                         printf("refuses tagged commands.  Performing "
 1739                                "non-tagged I/O\n");
 1740                         xpt_setup_ccb(&neg.ccb_h, csio->ccb_h.path,
 1741                                       /*priority*/1); 
 1742                         xpt_async(AC_TRANSFER_NEG, csio->ccb_h.path, &neg);
 1743                         bt->tags_permitted &= ~(0x01 << csio->ccb_h.target_id);
 1744                         csio->ccb_h.status = CAM_MSG_REJECT_REC;
 1745                         break;
 1746                 }
 1747                 case BTSTAT_UNSUPPORTED_MSG_RECEIVED:
 1748                         /*
 1749                          * XXX You would think that this is
 1750                          *     a recoverable error... Hmmm.
 1751                          */
 1752                         csio->ccb_h.status = CAM_REQ_CMP_ERR;
 1753                         break;
 1754                 case BTSTAT_HA_SOFTWARE_ERROR:
 1755                 case BTSTAT_HA_WATCHDOG_ERROR:
 1756                 case BTSTAT_HARDWARE_FAILURE:
 1757                         /* Hardware reset ??? Can we recover ??? */
 1758                         csio->ccb_h.status = CAM_NO_HBA;
 1759                         break;
 1760                 case BTSTAT_TARGET_IGNORED_ATN:
 1761                 case BTSTAT_OTHER_SCSI_BUS_RESET:
 1762                 case BTSTAT_HA_SCSI_BUS_RESET:
 1763                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
 1764                          != CAM_CMD_TIMEOUT)
 1765                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
 1766                         break;
 1767                 case BTSTAT_HA_BDR:
 1768                         if ((bccb->flags & BCCB_DEVICE_RESET) == 0)
 1769                                 csio->ccb_h.status = CAM_BDR_SENT;
 1770                         else
 1771                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
 1772                         break;
 1773                 case BTSTAT_INVALID_RECONNECT:
 1774                 case BTSTAT_ABORT_QUEUE_GENERATED:
 1775                         csio->ccb_h.status = CAM_REQ_TERMIO;
 1776                         break;
 1777                 case BTSTAT_SCSI_PERROR_DETECTED:
 1778                         csio->ccb_h.status = CAM_UNCOR_PARITY;
 1779                         break;
 1780                 }
 1781                 if (csio->ccb_h.status != CAM_REQ_CMP) {
 1782                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
 1783                         csio->ccb_h.status |= CAM_DEV_QFRZN;
 1784                 }
 1785                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
 1786                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1787                 btfreeccb(bt, bccb);
 1788                 xpt_done(ccb);
 1789                 break;
 1790         case BMBI_OK:
 1791                 /* All completed without incident */
 1792                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1793                 if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
 1794                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1795                 btfreeccb(bt, bccb);
 1796                 xpt_done(ccb);
 1797                 break;
 1798         }
 1799 }
 1800 
 1801 static int
 1802 btreset(struct bt_softc* bt, int hard_reset)
 1803 {
 1804         struct   ccb_hdr *ccb_h;
 1805         u_int    status;
 1806         u_int    timeout;
 1807         u_int8_t reset_type;
 1808 
 1809         if (hard_reset != 0)
 1810                 reset_type = HARD_RESET;
 1811         else
 1812                 reset_type = SOFT_RESET;
 1813         bt_outb(bt, CONTROL_REG, reset_type);
 1814 
 1815         /* Wait 5sec. for Diagnostic start */
 1816         timeout = 5 * 10000;
 1817         while (--timeout) {
 1818                 status = bt_inb(bt, STATUS_REG);
 1819                 if ((status & DIAG_ACTIVE) != 0)
 1820                         break;
 1821                 DELAY(100);
 1822         }
 1823         if (timeout == 0) {
 1824                 if (bootverbose)
 1825                         printf("%s: btreset - Diagnostic Active failed to "
 1826                                 "assert. status = 0x%x\n", bt_name(bt), status);
 1827                 return (ETIMEDOUT);
 1828         }
 1829 
 1830         /* Wait 10sec. for Diagnostic end */
 1831         timeout = 10 * 10000;
 1832         while (--timeout) {
 1833                 status = bt_inb(bt, STATUS_REG);
 1834                 if ((status & DIAG_ACTIVE) == 0)
 1835                         break;
 1836                 DELAY(100);
 1837         }
 1838         if (timeout == 0) {
 1839                 panic("%s: btreset - Diagnostic Active failed to drop. "
 1840                        "status = 0x%x\n", bt_name(bt), status);
 1841                 return (ETIMEDOUT);
 1842         }
 1843 
 1844         /* Wait for the host adapter to become ready or report a failure */
 1845         timeout = 10000;
 1846         while (--timeout) {
 1847                 status = bt_inb(bt, STATUS_REG);
 1848                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
 1849                         break;
 1850                 DELAY(100);
 1851         }
 1852         if (timeout == 0) {
 1853                 printf("%s: btreset - Host adapter failed to come ready. "
 1854                        "status = 0x%x\n", bt_name(bt), status);
 1855                 return (ETIMEDOUT);
 1856         }
 1857 
 1858         /* If the diagnostics failed, tell the user */
 1859         if ((status & DIAG_FAIL) != 0
 1860          || (status & HA_READY) == 0) {
 1861                 printf("%s: btreset - Adapter failed diagnostics\n",
 1862                        bt_name(bt));
 1863 
 1864                 if ((status & DATAIN_REG_READY) != 0)
 1865                         printf("%s: btreset - Host Adapter Error code = 0x%x\n",
 1866                                bt_name(bt), bt_inb(bt, DATAIN_REG));
 1867                 return (ENXIO);
 1868         }
 1869 
 1870         /* If we've allocated mailboxes, initialize them */
 1871         if (bt->init_level > 4)
 1872                 btinitmboxes(bt);
 1873 
 1874         /* If we've attached to the XPT, tell it about the event */
 1875         if (bt->path != NULL)
 1876                 xpt_async(AC_BUS_RESET, bt->path, NULL);
 1877 
 1878         /*
 1879          * Perform completion processing for all outstanding CCBs.
 1880          */
 1881         while ((ccb_h = LIST_FIRST(&bt->pending_ccbs)) != NULL) {
 1882                 struct bt_ccb *pending_bccb;
 1883 
 1884                 pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 1885                 pending_bccb->hccb.btstat = BTSTAT_HA_SCSI_BUS_RESET;
 1886                 btdone(bt, pending_bccb, BMBI_ERROR);
 1887         }
 1888 
 1889         return (0);
 1890 }
 1891 
 1892 /*
 1893  * Send a command to the adapter.
 1894  */
 1895 int
 1896 bt_cmd(struct bt_softc *bt, bt_op_t opcode, u_int8_t *params, u_int param_len,
 1897       u_int8_t *reply_data, u_int reply_len, u_int cmd_timeout)
 1898 {
 1899         u_int   timeout;
 1900         u_int   status;
 1901         u_int   saved_status;
 1902         u_int   intstat;
 1903         u_int   reply_buf_size;
 1904         int     s;
 1905         int     cmd_complete;
 1906         int     error;
 1907 
 1908         /* No data returned to start */
 1909         reply_buf_size = reply_len;
 1910         reply_len = 0;
 1911         intstat = 0;
 1912         cmd_complete = 0;
 1913         saved_status = 0;
 1914         error = 0;
 1915 
 1916         bt->command_cmp = 0;
 1917         /*
 1918          * Wait up to 10 sec. for the adapter to become
 1919          * ready to accept commands.
 1920          */
 1921         timeout = 100000;
 1922         while (--timeout) {
 1923                 status = bt_inb(bt, STATUS_REG);
 1924                 if ((status & HA_READY) != 0
 1925                  && (status & CMD_REG_BUSY) == 0)
 1926                         break;
 1927                 /*
 1928                  * Throw away any pending data which may be
 1929                  * left over from earlier commands that we
 1930                  * timedout on.
 1931                  */
 1932                 if ((status & DATAIN_REG_READY) != 0)
 1933                         (void)bt_inb(bt, DATAIN_REG);
 1934                 DELAY(100);
 1935         }
 1936         if (timeout == 0) {
 1937                 printf("%s: bt_cmd: Timeout waiting for adapter ready, "
 1938                        "status = 0x%x\n", bt_name(bt), status);
 1939                 return (ETIMEDOUT);
 1940         }
 1941 
 1942         /*
 1943          * Send the opcode followed by any necessary parameter bytes.
 1944          */
 1945         bt_outb(bt, COMMAND_REG, opcode);
 1946 
 1947         /*
 1948          * Wait for up to 1sec for each byte of the the
 1949          * parameter list sent to be sent.
 1950          */
 1951         timeout = 10000;
 1952         while (param_len && --timeout) {
 1953                 DELAY(100);
 1954                 s = splcam();
 1955                 status = bt_inb(bt, STATUS_REG);
 1956                 intstat = bt_inb(bt, INTSTAT_REG);
 1957                 splx(s);
 1958         
 1959                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1960                  == (INTR_PENDING|CMD_COMPLETE)) {
 1961                         saved_status = status;
 1962                         cmd_complete = 1;
 1963                         break;
 1964                 }
 1965                 if (bt->command_cmp != 0) {
 1966                         saved_status = bt->latched_status;
 1967                         cmd_complete = 1;
 1968                         break;
 1969                 }
 1970                 if ((status & DATAIN_REG_READY) != 0)
 1971                         break;
 1972                 if ((status & CMD_REG_BUSY) == 0) {
 1973                         bt_outb(bt, COMMAND_REG, *params++);
 1974                         param_len--;
 1975                         timeout = 10000;
 1976                 }
 1977         }
 1978         if (timeout == 0) {
 1979                 printf("%s: bt_cmd: Timeout sending parameters, "
 1980                        "status = 0x%x\n", bt_name(bt), status);
 1981                 cmd_complete = 1;
 1982                 saved_status = status;
 1983                 error = ETIMEDOUT;
 1984         }
 1985 
 1986         /*
 1987          * Wait for the command to complete.
 1988          */
 1989         while (cmd_complete == 0 && --cmd_timeout) {
 1990 
 1991                 s = splcam();
 1992                 status = bt_inb(bt, STATUS_REG);
 1993                 intstat = bt_inb(bt, INTSTAT_REG);
 1994                 /*
 1995                  * It may be that this command was issued with
 1996                  * controller interrupts disabled.  We'll never
 1997                  * get to our command if an incoming mailbox
 1998                  * interrupt is pending, so take care of completed
 1999                  * mailbox commands by calling our interrupt handler.
 2000                  */
 2001                 if ((intstat & (INTR_PENDING|IMB_LOADED))
 2002                  == (INTR_PENDING|IMB_LOADED))
 2003                         bt_intr(bt);
 2004                 splx(s);
 2005 
 2006                 if (bt->command_cmp != 0) {
 2007                         /*
 2008                          * Our interrupt handler saw CMD_COMPLETE
 2009                          * status before we did.
 2010                          */
 2011                         cmd_complete = 1;
 2012                         saved_status = bt->latched_status;
 2013                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 2014                         == (INTR_PENDING|CMD_COMPLETE)) {
 2015                         /*
 2016                          * Our poll (in case interrupts are blocked)
 2017                          * saw the CMD_COMPLETE interrupt.
 2018                          */
 2019                         cmd_complete = 1;
 2020                         saved_status = status;
 2021                 } else if (opcode == BOP_MODIFY_IO_ADDR
 2022                         && (status & CMD_REG_BUSY) == 0) {
 2023                         /*
 2024                          * The BOP_MODIFY_IO_ADDR does not issue a CMD_COMPLETE,
 2025                          * but it should update the status register.  So, we
 2026                          * consider this command complete when the CMD_REG_BUSY
 2027                          * status clears.
 2028                          */
 2029                         saved_status = status;
 2030                         cmd_complete = 1;
 2031                 } else if ((status & DATAIN_REG_READY) != 0) {
 2032                         u_int8_t data;
 2033 
 2034                         data = bt_inb(bt, DATAIN_REG);
 2035                         if (reply_len < reply_buf_size) {
 2036                                 *reply_data++ = data;
 2037                         } else {
 2038                                 printf("%s: bt_cmd - Discarded reply data byte "
 2039                                        "for opcode 0x%x\n", bt_name(bt),
 2040                                        opcode);
 2041                         }
 2042                         /*
 2043                          * Reset timeout to ensure at least a second
 2044                          * between response bytes.
 2045                          */
 2046                         cmd_timeout = MAX(cmd_timeout, 10000);
 2047                         reply_len++;
 2048 
 2049                 } else if ((opcode == BOP_FETCH_LRAM)
 2050                         && (status & HA_READY) != 0) {
 2051                                 saved_status = status;
 2052                                 cmd_complete = 1;
 2053                 }
 2054                 DELAY(100);
 2055         }
 2056         if (cmd_timeout == 0) {
 2057                 printf("%s: bt_cmd: Timeout waiting for command (%x) "
 2058                        "to complete.\n%s: status = 0x%x, intstat = 0x%x, "
 2059                        "rlen %d\n", bt_name(bt), opcode,
 2060                        bt_name(bt), status, intstat, reply_len);
 2061                 error = (ETIMEDOUT);
 2062         }
 2063 
 2064         /*
 2065          * Clear any pending interrupts.  Block interrupts so our
 2066          * interrupt handler is not re-entered.
 2067          */
 2068         s = splcam();
 2069         bt_intr(bt);
 2070         splx(s);
 2071         
 2072         if (error != 0)
 2073                 return (error);
 2074 
 2075         /*
 2076          * If the command was rejected by the controller, tell the caller.
 2077          */
 2078         if ((saved_status & CMD_INVALID) != 0) {
 2079                 /*
 2080                  * Some early adapters may not recover properly from
 2081                  * an invalid command.  If it appears that the controller
 2082                  * has wedged (i.e. status was not cleared by our interrupt
 2083                  * reset above), perform a soft reset.
 2084                  */
 2085                 if (bootverbose)
 2086                         printf("%s: Invalid Command 0x%x\n", bt_name(bt), 
 2087                                 opcode);
 2088                 DELAY(1000);
 2089                 status = bt_inb(bt, STATUS_REG);
 2090                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
 2091                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
 2092                  || (status & (HA_READY|INIT_REQUIRED))
 2093                   != (HA_READY|INIT_REQUIRED)) {
 2094                         btreset(bt, /*hard_reset*/FALSE);
 2095                 }
 2096                 return (EINVAL);
 2097         }
 2098 
 2099         if (param_len > 0) {
 2100                 /* The controller did not accept the full argument list */
 2101                 return (E2BIG);
 2102         }
 2103 
 2104         if (reply_len != reply_buf_size) {
 2105                 /* Too much or too little data received */
 2106                 return (EMSGSIZE);
 2107         }
 2108 
 2109         /* We were successful */
 2110         return (0);
 2111 }
 2112 
 2113 static int
 2114 btinitmboxes(struct bt_softc *bt) {
 2115         init_32b_mbox_params_t init_mbox;
 2116         int error;
 2117 
 2118         bzero(bt->in_boxes, sizeof(bt_mbox_in_t) * bt->num_boxes);
 2119         bzero(bt->out_boxes, sizeof(bt_mbox_out_t) * bt->num_boxes);
 2120         bt->cur_inbox = bt->in_boxes;
 2121         bt->last_inbox = bt->in_boxes + bt->num_boxes - 1;
 2122         bt->cur_outbox = bt->out_boxes;
 2123         bt->last_outbox = bt->out_boxes + bt->num_boxes - 1;
 2124 
 2125         /* Tell the adapter about them */
 2126         init_mbox.num_boxes = bt->num_boxes;
 2127         init_mbox.base_addr[0] = bt->mailbox_physbase & 0xFF;
 2128         init_mbox.base_addr[1] = (bt->mailbox_physbase >> 8) & 0xFF;
 2129         init_mbox.base_addr[2] = (bt->mailbox_physbase >> 16) & 0xFF;
 2130         init_mbox.base_addr[3] = (bt->mailbox_physbase >> 24) & 0xFF;
 2131         error = bt_cmd(bt, BOP_INITIALIZE_32BMBOX, (u_int8_t *)&init_mbox,
 2132                        /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
 2133                        /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
 2134 
 2135         if (error != 0)
 2136                 printf("btinitmboxes: Initialization command failed\n");
 2137         else if (bt->strict_rr != 0) {
 2138                 /*
 2139                  * If the controller supports
 2140                  * strict round robin mode,
 2141                  * enable it
 2142                  */
 2143                 u_int8_t param;
 2144 
 2145                 param = 0;
 2146                 error = bt_cmd(bt, BOP_ENABLE_STRICT_RR, &param, 1,
 2147                                /*reply_buf*/NULL, /*reply_len*/0,
 2148                                DEFAULT_CMD_TIMEOUT);
 2149 
 2150                 if (error != 0) {
 2151                         printf("btinitmboxes: Unable to enable strict RR\n");
 2152                         error = 0;
 2153                 } else if (bootverbose) {
 2154                         printf("%s: Using Strict Round Robin Mailbox Mode\n",
 2155                                bt_name(bt));
 2156                 }
 2157         }
 2158         
 2159         return (error);
 2160 }
 2161 
 2162 /*
 2163  * Update the XPT's idea of the negotiated transfer
 2164  * parameters for a particular target.
 2165  */
 2166 static void
 2167 btfetchtransinfo(struct bt_softc *bt, struct ccb_trans_settings *cts)
 2168 {
 2169         setup_data_t    setup_info;
 2170         u_int           target;
 2171         u_int           targ_offset;
 2172         u_int           targ_mask;
 2173         u_int           sync_period;
 2174         u_int           sync_offset;
 2175         u_int           bus_width;
 2176         int             error;
 2177         u_int8_t        param;
 2178         targ_syncinfo_t sync_info;
 2179         struct ccb_trans_settings_scsi *scsi =
 2180             &cts->proto_specific.scsi;
 2181         struct ccb_trans_settings_spi *spi =
 2182             &cts->xport_specific.spi;
 2183 
 2184         spi->valid = 0;
 2185         scsi->valid = 0;
 2186 
 2187         target = cts->ccb_h.target_id;
 2188         targ_offset = (target & 0x7);
 2189         targ_mask = (0x01 << targ_offset);
 2190 
 2191         /*
 2192          * Inquire Setup Information.  This command retreives the
 2193          * Wide negotiation status for recent adapters as well as
 2194          * the sync info for older models.
 2195          */
 2196         param = sizeof(setup_info);
 2197         error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
 2198                        (u_int8_t*)&setup_info, sizeof(setup_info),
 2199                        DEFAULT_CMD_TIMEOUT);
 2200 
 2201         if (error != 0) {
 2202                 printf("%s: btfetchtransinfo - Inquire Setup Info Failed %x\n",
 2203                        bt_name(bt), error);
 2204                 return;
 2205         }
 2206 
 2207         sync_info = (target < 8) ? setup_info.low_syncinfo[targ_offset]
 2208                                  : setup_info.high_syncinfo[targ_offset];
 2209 
 2210         if (sync_info.sync == 0)
 2211                 sync_offset = 0;
 2212         else
 2213                 sync_offset = sync_info.offset;
 2214 
 2215 
 2216         bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 2217         if (strcmp(bt->firmware_ver, "5.06L") >= 0) {
 2218                 u_int wide_active;
 2219 
 2220                 wide_active =
 2221                     (target < 8) ? (setup_info.low_wide_active & targ_mask)
 2222                                  : (setup_info.high_wide_active & targ_mask);
 2223 
 2224                 if (wide_active)
 2225                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 2226         } else if ((bt->wide_permitted & targ_mask) != 0) {
 2227                 struct ccb_getdev cgd;
 2228 
 2229                 /*
 2230                  * Prior to rev 5.06L, wide status isn't provided,
 2231                  * so we "guess" that wide transfers are in effect
 2232                  * if the user settings allow for wide and the inquiry
 2233                  * data for the device indicates that it can handle
 2234                  * wide transfers.
 2235                  */
 2236                 xpt_setup_ccb(&cgd.ccb_h, cts->ccb_h.path, /*priority*/1);
 2237                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
 2238                 xpt_action((union ccb *)&cgd);
 2239                 if ((cgd.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
 2240                  && (cgd.inq_data.flags & SID_WBus16) != 0)
 2241                         bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 2242         }
 2243 
 2244         if (bt->firmware_ver[0] >= '3') {
 2245                 /*
 2246                  * For adapters that can do fast or ultra speeds,
 2247                  * use the more exact Target Sync Information command.
 2248                  */
 2249                 target_sync_info_data_t sync_info;
 2250 
 2251                 param = sizeof(sync_info);
 2252                 error = bt_cmd(bt, BOP_TARG_SYNC_INFO, &param, /*paramlen*/1,
 2253                                (u_int8_t*)&sync_info, sizeof(sync_info),
 2254                                DEFAULT_CMD_TIMEOUT);
 2255                 
 2256                 if (error != 0) {
 2257                         printf("%s: btfetchtransinfo - Inquire Sync "
 2258                                "Info Failed 0x%x\n", bt_name(bt), error);
 2259                         return;
 2260                 }
 2261                 sync_period = sync_info.sync_rate[target] * 100;
 2262         } else {
 2263                 sync_period = 2000 + (500 * sync_info.period);
 2264         }
 2265 
 2266         cts->protocol = PROTO_SCSI;
 2267         cts->protocol_version = SCSI_REV_2;
 2268         cts->transport = XPORT_SPI;
 2269         cts->transport_version = 2;
 2270 
 2271         spi->sync_period = sync_period;
 2272         spi->valid |= CTS_SPI_VALID_SYNC_RATE;
 2273         spi->sync_offset = sync_offset;
 2274         spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
 2275 
 2276         spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
 2277         spi->bus_width = bus_width;
 2278 
 2279         if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 2280                 scsi->valid = CTS_SCSI_VALID_TQ;
 2281                 spi->valid |= CTS_SPI_VALID_DISC;
 2282         } else
 2283                 scsi->valid = 0;
 2284         
 2285         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
 2286 }
 2287 
 2288 static void
 2289 btmapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2290 {
 2291         struct bt_softc* bt;
 2292 
 2293         bt = (struct bt_softc*)arg;
 2294         bt->mailbox_physbase = segs->ds_addr;
 2295 }
 2296 
 2297 static void
 2298 btmapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2299 {
 2300         struct bt_softc* bt;
 2301 
 2302         bt = (struct bt_softc*)arg;
 2303         bt->bt_ccb_physbase = segs->ds_addr;
 2304 }
 2305 
 2306 static void
 2307 btmapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 2308 {
 2309 
 2310         struct bt_softc* bt;
 2311 
 2312         bt = (struct bt_softc*)arg;
 2313         SLIST_FIRST(&bt->sg_maps)->sg_physaddr = segs->ds_addr;
 2314 }
 2315 
 2316 static void
 2317 btpoll(struct cam_sim *sim)
 2318 {
 2319         bt_intr(cam_sim_softc(sim));
 2320 }
 2321 
 2322 void
 2323 bttimeout(void *arg)
 2324 {
 2325         struct bt_ccb   *bccb;
 2326         union  ccb      *ccb;
 2327         struct bt_softc *bt;
 2328         int              s;
 2329 
 2330         bccb = (struct bt_ccb *)arg;
 2331         ccb = bccb->ccb;
 2332         bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
 2333         xpt_print_path(ccb->ccb_h.path);
 2334         printf("CCB %p - timed out\n", (void *)bccb);
 2335 
 2336         s = splcam();
 2337 
 2338         if ((bccb->flags & BCCB_ACTIVE) == 0) {
 2339                 xpt_print_path(ccb->ccb_h.path);
 2340                 printf("CCB %p - timed out CCB already completed\n",
 2341                        (void *)bccb);
 2342                 splx(s);
 2343                 return;
 2344         }
 2345 
 2346         /*
 2347          * In order to simplify the recovery process, we ask the XPT
 2348          * layer to halt the queue of new transactions and we traverse
 2349          * the list of pending CCBs and remove their timeouts. This
 2350          * means that the driver attempts to clear only one error
 2351          * condition at a time.  In general, timeouts that occur
 2352          * close together are related anyway, so there is no benefit
 2353          * in attempting to handle errors in parrallel.  Timeouts will
 2354          * be reinstated when the recovery process ends.
 2355          */
 2356         if ((bccb->flags & BCCB_DEVICE_RESET) == 0) {
 2357                 struct ccb_hdr *ccb_h;
 2358 
 2359                 if ((bccb->flags & BCCB_RELEASE_SIMQ) == 0) {
 2360                         xpt_freeze_simq(bt->sim, /*count*/1);
 2361                         bccb->flags |= BCCB_RELEASE_SIMQ;
 2362                 }
 2363 
 2364                 ccb_h = LIST_FIRST(&bt->pending_ccbs);
 2365                 while (ccb_h != NULL) {
 2366                         struct bt_ccb *pending_bccb;
 2367 
 2368                         pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
 2369                         untimeout(bttimeout, pending_bccb, ccb_h->timeout_ch);
 2370                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 2371                 }
 2372         }
 2373 
 2374         if ((bccb->flags & BCCB_DEVICE_RESET) != 0
 2375          || bt->cur_outbox->action_code != BMBO_FREE
 2376          || ((bccb->hccb.tag_enable == TRUE)
 2377           && (bt->firmware_ver[0] < '5'))) {
 2378                 /*
 2379                  * Try a full host adapter/SCSI bus reset.
 2380                  * We do this only if we have already attempted
 2381                  * to clear the condition with a BDR, or we cannot
 2382                  * attempt a BDR for lack of mailbox resources
 2383                  * or because of faulty firmware.  It turns out
 2384                  * that firmware versions prior to 5.xx treat BDRs
 2385                  * as untagged commands that cannot be sent until
 2386                  * all outstanding tagged commands have been processed.
 2387                  * This makes it somewhat difficult to use a BDR to
 2388                  * clear up a problem with an uncompleted tagged command.
 2389                  */
 2390                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 2391                 btreset(bt, /*hardreset*/TRUE);
 2392                 printf("%s: No longer in timeout\n", bt_name(bt));
 2393         } else {
 2394                 /*    
 2395                  * Send a Bus Device Reset message:
 2396                  * The target that is holding up the bus may not
 2397                  * be the same as the one that triggered this timeout
 2398                  * (different commands have different timeout lengths),
 2399                  * but we have no way of determining this from our
 2400                  * timeout handler.  Our strategy here is to queue a
 2401                  * BDR message to the target of the timed out command.
 2402                  * If this fails, we'll get another timeout 2 seconds
 2403                  * later which will attempt a bus reset.
 2404                  */
 2405                 bccb->flags |= BCCB_DEVICE_RESET;
 2406                 ccb->ccb_h.timeout_ch =
 2407                     timeout(bttimeout, (caddr_t)bccb, 2 * hz);
 2408 
 2409                 bt->recovery_bccb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
 2410 
 2411                 /* No Data Transfer */
 2412                 bt->recovery_bccb->hccb.datain = TRUE;
 2413                 bt->recovery_bccb->hccb.dataout = TRUE;
 2414                 bt->recovery_bccb->hccb.btstat = 0;
 2415                 bt->recovery_bccb->hccb.sdstat = 0;
 2416                 bt->recovery_bccb->hccb.target_id = ccb->ccb_h.target_id;
 2417 
 2418                 /* Tell the adapter about this command */
 2419                 bt->cur_outbox->ccb_addr = btccbvtop(bt, bt->recovery_bccb);
 2420                 bt->cur_outbox->action_code = BMBO_START;
 2421                 bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
 2422                 btnextoutbox(bt);
 2423         }
 2424 
 2425         splx(s);
 2426 }
 2427 
 2428 MODULE_VERSION(bt, 1);
 2429 MODULE_DEPEND(bt, cam, 1, 1, 1);

Cache object: 6e9257476c0a2cfa0e5d99b6f184f418


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