The Design and Implementation of the FreeBSD Operating System, Second Edition
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sys/dev/aha/aha.c

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    1 /*
    2  * Generic register and struct definitions for the Adaptech 154x/164x
    3  * SCSI host adapters. Product specific probe and attach routines can
    4  * be found in:
    5  *      aha 1542A/1542B/1542C/1542CF/1542CP     aha_isa.c
    6  *      aha 1640                        aha_mca.c
    7  */
    8 /*-
    9  * Copyright (c) 1998 M. Warner Losh.
   10  * All Rights Reserved.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  * Derived from bt.c written by:
   34  *
   35  * Copyright (c) 1998 Justin T. Gibbs.
   36  * All rights reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions, and the following disclaimer,
   43  *    without modification, immediately at the beginning of the file.
   44  * 2. The name of the author may not be used to endorse or promote products
   45  *    derived from this software without specific prior written permission.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   50  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   51  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   57  * SUCH DAMAGE.
   58  */
   59 
   60 #include <sys/cdefs.h>
   61 __FBSDID("$FreeBSD: releng/8.4/sys/dev/aha/aha.c 181530 2008-08-10 15:10:39Z keramida $");
   62 
   63 #include <sys/param.h>
   64 #include <sys/bus.h>
   65 #include <sys/systm.h>
   66 #include <sys/malloc.h>
   67 #include <sys/kernel.h>
   68 #include <sys/lock.h>
   69 #include <sys/module.h>
   70 #include <sys/mutex.h>
   71 
   72 #include <machine/bus.h>
   73 
   74 #include <cam/cam.h>
   75 #include <cam/cam_ccb.h>
   76 #include <cam/cam_sim.h>
   77 #include <cam/cam_xpt_sim.h>
   78 #include <cam/cam_debug.h>
   79 
   80 #include <cam/scsi/scsi_message.h>
   81 
   82 #include <dev/aha/ahareg.h>
   83 
   84 #define PRVERB(x) do { if (bootverbose) device_printf x; } while (0)
   85 
   86 /* Macro to determine that a rev is potentially a new valid one
   87  * so that the driver doesn't keep breaking on new revs as it
   88  * did for the CF and CP.
   89  */
   90 #define PROBABLY_NEW_BOARD(REV) (REV > 0x43 && REV < 0x56)
   91 
   92 /* MailBox Management functions */
   93 static __inline void    ahanextinbox(struct aha_softc *aha);
   94 static __inline void    ahanextoutbox(struct aha_softc *aha);
   95 
   96 #define aha_name(aha)   device_get_nameunit(aha->dev)
   97 
   98 static __inline void
   99 ahanextinbox(struct aha_softc *aha)
  100 {
  101         if (aha->cur_inbox == aha->last_inbox)
  102                 aha->cur_inbox = aha->in_boxes;
  103         else
  104                 aha->cur_inbox++;
  105 }
  106 
  107 static __inline void
  108 ahanextoutbox(struct aha_softc *aha)
  109 {
  110         if (aha->cur_outbox == aha->last_outbox)
  111                 aha->cur_outbox = aha->out_boxes;
  112         else
  113                 aha->cur_outbox++;
  114 }
  115 
  116 #define ahautoa24(u,s3)                 \
  117         (s3)[0] = ((u) >> 16) & 0xff;   \
  118         (s3)[1] = ((u) >> 8) & 0xff;    \
  119         (s3)[2] = (u) & 0xff;
  120 
  121 #define aha_a24tou(s3) \
  122         (((s3)[0] << 16) | ((s3)[1] << 8) | (s3)[2])
  123 
  124 /* CCB Management functions */
  125 static __inline uint32_t                ahaccbvtop(struct aha_softc *aha,
  126                                                   struct aha_ccb *accb);
  127 static __inline struct aha_ccb*         ahaccbptov(struct aha_softc *aha,
  128                                                   uint32_t ccb_addr);
  129 
  130 static __inline uint32_t
  131 ahaccbvtop(struct aha_softc *aha, struct aha_ccb *accb)
  132 {
  133         return (aha->aha_ccb_physbase
  134               + (uint32_t)((caddr_t)accb - (caddr_t)aha->aha_ccb_array));
  135 }
  136 static __inline struct aha_ccb *
  137 ahaccbptov(struct aha_softc *aha, uint32_t ccb_addr)
  138 {
  139         return (aha->aha_ccb_array +
  140               + ((struct aha_ccb*)(uintptr_t)ccb_addr -
  141                  (struct aha_ccb*)(uintptr_t)aha->aha_ccb_physbase));
  142 }
  143 
  144 static struct aha_ccb*  ahagetccb(struct aha_softc *aha);
  145 static __inline void    ahafreeccb(struct aha_softc *aha, struct aha_ccb *accb);
  146 static void             ahaallocccbs(struct aha_softc *aha);
  147 static bus_dmamap_callback_t ahaexecuteccb;
  148 static void             ahadone(struct aha_softc *aha, struct aha_ccb *accb,
  149                                aha_mbi_comp_code_t comp_code);
  150 
  151 /* Host adapter command functions */
  152 static int      ahareset(struct aha_softc* aha, int hard_reset);
  153 
  154 /* Initialization functions */
  155 static int                      ahainitmboxes(struct aha_softc *aha);
  156 static bus_dmamap_callback_t    ahamapmboxes;
  157 static bus_dmamap_callback_t    ahamapccbs;
  158 static bus_dmamap_callback_t    ahamapsgs;
  159 
  160 /* Transfer Negotiation Functions */
  161 static void ahafetchtransinfo(struct aha_softc *aha,
  162                              struct ccb_trans_settings *cts);
  163 
  164 /* CAM SIM entry points */
  165 #define ccb_accb_ptr spriv_ptr0
  166 #define ccb_aha_ptr spriv_ptr1
  167 static void     ahaaction(struct cam_sim *sim, union ccb *ccb);
  168 static void     ahapoll(struct cam_sim *sim);
  169 
  170 /* Our timeout handler */
  171 static timeout_t ahatimeout;
  172 
  173 /* Exported functions */
  174 void
  175 aha_alloc(struct aha_softc *aha, int unit, bus_space_tag_t tag,
  176   bus_space_handle_t bsh)
  177 {
  178 
  179         SLIST_INIT(&aha->free_aha_ccbs);
  180         LIST_INIT(&aha->pending_ccbs);
  181         SLIST_INIT(&aha->sg_maps);
  182         aha->unit = unit;
  183         aha->tag = tag;
  184         aha->bsh = bsh;
  185         aha->ccb_sg_opcode = INITIATOR_SG_CCB_WRESID;
  186         aha->ccb_ccb_opcode = INITIATOR_CCB_WRESID;
  187 }
  188 
  189 void
  190 aha_free(struct aha_softc *aha)
  191 {
  192         switch (aha->init_level) {
  193         default:
  194         case 8:
  195         {
  196                 struct sg_map_node *sg_map;
  197 
  198                 while ((sg_map = SLIST_FIRST(&aha->sg_maps))!= NULL) {
  199                         SLIST_REMOVE_HEAD(&aha->sg_maps, links);
  200                         bus_dmamap_unload(aha->sg_dmat, sg_map->sg_dmamap);
  201                         bus_dmamem_free(aha->sg_dmat, sg_map->sg_vaddr,
  202                             sg_map->sg_dmamap);
  203                         free(sg_map, M_DEVBUF);
  204                 }
  205                 bus_dma_tag_destroy(aha->sg_dmat);
  206         }
  207         case 7:
  208                 bus_dmamap_unload(aha->ccb_dmat, aha->ccb_dmamap);
  209         case 6:
  210                 bus_dmamap_destroy(aha->ccb_dmat, aha->ccb_dmamap);
  211                 bus_dmamem_free(aha->ccb_dmat, aha->aha_ccb_array,
  212                     aha->ccb_dmamap);
  213         case 5:
  214                 bus_dma_tag_destroy(aha->ccb_dmat);
  215         case 4:
  216                 bus_dmamap_unload(aha->mailbox_dmat, aha->mailbox_dmamap);
  217         case 3:
  218                 bus_dmamem_free(aha->mailbox_dmat, aha->in_boxes,
  219                     aha->mailbox_dmamap);
  220                 bus_dmamap_destroy(aha->mailbox_dmat, aha->mailbox_dmamap);
  221         case 2:
  222                 bus_dma_tag_destroy(aha->buffer_dmat);
  223         case 1:
  224                 bus_dma_tag_destroy(aha->mailbox_dmat);
  225         case 0:
  226                 break;
  227         }
  228 }
  229 
  230 /*
  231  * Probe the adapter and verify that the card is an Adaptec.
  232  */
  233 int
  234 aha_probe(struct aha_softc* aha)
  235 {
  236         u_int    status;
  237         u_int    intstat;
  238         int      error;
  239         board_id_data_t board_id;
  240 
  241         /*
  242          * See if the three I/O ports look reasonable.
  243          * Touch the minimal number of registers in the
  244          * failure case.
  245          */
  246         status = aha_inb(aha, STATUS_REG);
  247         if ((status == 0) ||
  248             (status & (DIAG_ACTIVE|CMD_REG_BUSY | STATUS_REG_RSVD)) != 0) {
  249                 PRVERB((aha->dev, "status reg test failed %x\n", status));
  250                 return (ENXIO);
  251         }
  252 
  253         intstat = aha_inb(aha, INTSTAT_REG);
  254         if ((intstat & INTSTAT_REG_RSVD) != 0) {
  255                 PRVERB((aha->dev, "Failed Intstat Reg Test\n"));
  256                 return (ENXIO);
  257         }
  258 
  259         /*
  260          * Looking good so far.  Final test is to reset the
  261          * adapter and fetch the board ID and ensure we aren't
  262          * looking at a BusLogic.
  263          */
  264         if ((error = ahareset(aha, /*hard_reset*/TRUE)) != 0) {
  265                 PRVERB((aha->dev, "Failed Reset\n"));
  266                 return (ENXIO);
  267         }
  268 
  269         /*
  270          * Get the board ID.  We use this to see if we're dealing with
  271          * a buslogic card or an aha card (or clone).
  272          */
  273         error = aha_cmd(aha, AOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
  274             (uint8_t*)&board_id, sizeof(board_id), DEFAULT_CMD_TIMEOUT);
  275         if (error != 0) {
  276                 PRVERB((aha->dev, "INQUIRE failed %x\n", error));
  277                 return (ENXIO);
  278         }
  279         aha->fw_major = board_id.firmware_rev_major;
  280         aha->fw_minor = board_id.firmware_rev_minor;
  281         aha->boardid = board_id.board_type;
  282 
  283         /*
  284          * The Buslogic cards have an id of either 0x41 or 0x42.  So
  285          * if those come up in the probe, we test the geometry register
  286          * of the board.  Adaptec boards that are this old will not have
  287          * this register, and return 0xff, while buslogic cards will return
  288          * something different.
  289          *
  290          * It appears that for reasons unknow, for the for the
  291          * aha-1542B cards, we need to wait a little bit before trying
  292          * to read the geometry register.  I picked 10ms since we have
  293          * reports that a for loop to 1000 did the trick, and this
  294          * errs on the side of conservatism.  Besides, no one will
  295          * notice a 10mS delay here, even the 1542B card users :-)
  296          *
  297          * Some compatible cards return 0 here.  Some cards also
  298          * seem to return 0x7f.
  299          *
  300          * XXX I'm not sure how this will impact other cloned cards
  301          *
  302          * This really should be replaced with the esetup command, since
  303          * that appears to be more reliable.  This becomes more and more
  304          * true over time as we discover more cards that don't read the
  305          * geometry register consistantly.
  306          */
  307         if (aha->boardid <= 0x42) {
  308                 /* Wait 10ms before reading */
  309                 DELAY(10000);
  310                 status = aha_inb(aha, GEOMETRY_REG);
  311                 if (status != 0xff && status != 0x00 && status != 0x7f) {
  312                         PRVERB((aha->dev, "Geometry Register test failed %#x\n",
  313                                 status));
  314                         return (ENXIO);
  315                 }
  316         }
  317 
  318         return (0);
  319 }
  320 
  321 /*
  322  * Pull the boards setup information and record it in our softc.
  323  */
  324 int
  325 aha_fetch_adapter_info(struct aha_softc *aha)
  326 {
  327         setup_data_t    setup_info;
  328         config_data_t config_data;
  329         uint8_t length_param;
  330         int      error;
  331         struct  aha_extbios extbios;
  332 
  333         switch (aha->boardid) {
  334         case BOARD_1540_16HEAD_BIOS:
  335                 snprintf(aha->model, sizeof(aha->model), "1540 16 head BIOS");
  336                 break;
  337         case BOARD_1540_64HEAD_BIOS:
  338                 snprintf(aha->model, sizeof(aha->model), "1540 64 head BIOS");
  339                 break;
  340         case BOARD_1542:
  341                 snprintf(aha->model, sizeof(aha->model), "1540/1542 64 head BIOS");
  342                 break;
  343         case BOARD_1640:
  344                 snprintf(aha->model, sizeof(aha->model), "1640");
  345                 break;
  346         case BOARD_1740:
  347                 snprintf(aha->model, sizeof(aha->model), "1740A/1742A/1744");
  348                 break;
  349         case BOARD_1542C:
  350                 snprintf(aha->model, sizeof(aha->model), "1542C");
  351                 break;
  352         case BOARD_1542CF:
  353                 snprintf(aha->model, sizeof(aha->model), "1542CF");
  354                 break;
  355         case BOARD_1542CP:
  356                 snprintf(aha->model, sizeof(aha->model), "1542CP");
  357                 break;
  358         default:
  359                 snprintf(aha->model, sizeof(aha->model), "Unknown");
  360                 break;
  361         }
  362         /*
  363          * If we are a new type of 1542 board (anything newer than a 1542C)
  364          * then disable the extended bios so that the
  365          * mailbox interface is unlocked.
  366          * This is also true for the 1542B Version 3.20. First Adaptec
  367          * board that supports >1Gb drives.
  368          * No need to check the extended bios flags as some of the
  369          * extensions that cause us problems are not flagged in that byte.
  370          */
  371         if (PROBABLY_NEW_BOARD(aha->boardid) ||
  372                 (aha->boardid == 0x41
  373                 && aha->fw_major == 0x31 &&
  374                 aha->fw_minor >= 0x34)) {
  375                 error = aha_cmd(aha, AOP_RETURN_EXT_BIOS_INFO, NULL,
  376                     /*paramlen*/0, (u_char *)&extbios, sizeof(extbios),
  377                     DEFAULT_CMD_TIMEOUT);
  378                 if (error != 0) {
  379                         device_printf(aha->dev,
  380                             "AOP_RETURN_EXT_BIOS_INFO - Failed.");
  381                         return (error);
  382                 }
  383                 error = aha_cmd(aha, AOP_MBOX_IF_ENABLE, (uint8_t *)&extbios,
  384                     /*paramlen*/2, NULL, 0, DEFAULT_CMD_TIMEOUT);
  385                 if (error != 0) {
  386                         device_printf(aha->dev, "AOP_MBOX_IF_ENABLE - Failed.");
  387                         return (error);
  388                 }
  389         }
  390         if (aha->boardid < 0x41)
  391                 device_printf(aha->dev, "Warning: aha-1542A won't work.\n");
  392 
  393         aha->max_sg = 17;               /* Need >= 17 to do 64k I/O */
  394         aha->diff_bus = 0;
  395         aha->extended_lun = 0;
  396         aha->extended_trans = 0;
  397         aha->max_ccbs = 16;
  398         /* Determine Sync/Wide/Disc settings */
  399         length_param = sizeof(setup_info);
  400         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &length_param,
  401             /*paramlen*/1, (uint8_t*)&setup_info, sizeof(setup_info),
  402             DEFAULT_CMD_TIMEOUT);
  403         if (error != 0) {
  404                 device_printf(aha->dev, "aha_fetch_adapter_info - Failed "
  405                     "Get Setup Info\n");
  406                 return (error);
  407         }
  408         if (setup_info.initiate_sync != 0) {
  409                 aha->sync_permitted = ALL_TARGETS;
  410         }
  411         aha->disc_permitted = ALL_TARGETS;
  412 
  413         /* We need as many mailboxes as we can have ccbs */
  414         aha->num_boxes = aha->max_ccbs;
  415 
  416         /* Determine our SCSI ID */
  417         error = aha_cmd(aha, AOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  418             (uint8_t*)&config_data, sizeof(config_data), DEFAULT_CMD_TIMEOUT);
  419         if (error != 0) {
  420                 device_printf(aha->dev,
  421                     "aha_fetch_adapter_info - Failed Get Config\n");
  422                 return (error);
  423         }
  424         aha->scsi_id = config_data.scsi_id;
  425         return (0);
  426 }
  427 
  428 /*
  429  * Start the board, ready for normal operation
  430  */
  431 int
  432 aha_init(struct aha_softc* aha)
  433 {
  434         /* Announce the Adapter */
  435         device_printf(aha->dev, "AHA-%s FW Rev. %c.%c (ID=%x) ",
  436             aha->model, aha->fw_major, aha->fw_minor, aha->boardid);
  437 
  438         if (aha->diff_bus != 0)
  439                 printf("Diff ");
  440 
  441         printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", aha->scsi_id,
  442             aha->max_ccbs);
  443 
  444         /*
  445          * Create our DMA tags.  These tags define the kinds of device
  446          * accessible memory allocations and memory mappings we will
  447          * need to perform during normal operation.
  448          *
  449          * Unless we need to further restrict the allocation, we rely
  450          * on the restrictions of the parent dmat, hence the common
  451          * use of MAXADDR and MAXSIZE.
  452          */
  453 
  454         /* DMA tag for mapping buffers into device visible space. */
  455         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  456                                 /* alignment    */ 1,
  457                                 /* boundary     */ 0,
  458                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  459                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  460                                 /* filter       */ NULL,
  461                                 /* filterarg    */ NULL,
  462                                 /* maxsize      */ MAXBSIZE,
  463                                 /* nsegments    */ AHA_NSEG,
  464                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  465                                 /* flags        */ BUS_DMA_ALLOCNOW,
  466                                 /* lockfunc     */ busdma_lock_mutex,
  467                                 /* lockarg      */ &Giant,
  468                                 &aha->buffer_dmat) != 0) {
  469                 goto error_exit;
  470         }
  471 
  472         aha->init_level++;
  473         /* DMA tag for our mailboxes */
  474         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  475                                 /* alignment    */ 1,
  476                                 /* boundary     */ 0,
  477                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  478                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  479                                 /* filter       */ NULL,
  480                                 /* filterarg    */ NULL,
  481                                 /* maxsize      */ aha->num_boxes *
  482                                                    (sizeof(aha_mbox_in_t) +
  483                                                     sizeof(aha_mbox_out_t)),
  484                                 /* nsegments    */ 1,
  485                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  486                                 /* flags        */ 0,
  487                                 /* lockfunc     */ busdma_lock_mutex,
  488                                 /* lockarg      */ &Giant,
  489                                 &aha->mailbox_dmat) != 0) {
  490                 goto error_exit;
  491         }
  492 
  493         aha->init_level++;
  494 
  495         /* Allocation for our mailboxes */
  496         if (bus_dmamem_alloc(aha->mailbox_dmat, (void **)&aha->out_boxes,
  497             BUS_DMA_NOWAIT, &aha->mailbox_dmamap) != 0)
  498                 goto error_exit;
  499 
  500         aha->init_level++;
  501 
  502         /* And permanently map them */
  503         bus_dmamap_load(aha->mailbox_dmat, aha->mailbox_dmamap,
  504             aha->out_boxes, aha->num_boxes * (sizeof(aha_mbox_in_t) +
  505             sizeof(aha_mbox_out_t)), ahamapmboxes, aha, /*flags*/0);
  506 
  507         aha->init_level++;
  508 
  509         aha->in_boxes = (aha_mbox_in_t *)&aha->out_boxes[aha->num_boxes];
  510 
  511         ahainitmboxes(aha);
  512 
  513         /* DMA tag for our ccb structures */
  514         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  515                                 /* alignment    */ 1,
  516                                 /* boundary     */ 0,
  517                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  518                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  519                                 /* filter       */ NULL,
  520                                 /* filterarg    */ NULL,
  521                                 /* maxsize      */ aha->max_ccbs *
  522                                                    sizeof(struct aha_ccb),
  523                                 /* nsegments    */ 1,
  524                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  525                                 /* flags        */ 0,
  526                                 /* lockfunc     */ busdma_lock_mutex,
  527                                 /* lockarg      */ &Giant,
  528                                 &aha->ccb_dmat) != 0) {
  529                 goto error_exit;
  530         }
  531 
  532         aha->init_level++;
  533 
  534         /* Allocation for our ccbs */
  535         if (bus_dmamem_alloc(aha->ccb_dmat, (void **)&aha->aha_ccb_array,
  536             BUS_DMA_NOWAIT, &aha->ccb_dmamap) != 0)
  537                 goto error_exit;
  538 
  539         aha->init_level++;
  540 
  541         /* And permanently map them */
  542         bus_dmamap_load(aha->ccb_dmat, aha->ccb_dmamap, aha->aha_ccb_array,
  543             aha->max_ccbs * sizeof(struct aha_ccb), ahamapccbs, aha, /*flags*/0);
  544 
  545         aha->init_level++;
  546 
  547         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
  548         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  549                                 /* alignment    */ 1,
  550                                 /* boundary     */ 0,
  551                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  552                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  553                                 /* filter       */ NULL,
  554                                 /* filterarg    */ NULL,
  555                                 /* maxsize      */ PAGE_SIZE,
  556                                 /* nsegments    */ 1,
  557                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  558                                 /* flags        */ 0,
  559                                 /* lockfunc     */ busdma_lock_mutex,
  560                                 /* lockarg      */ &Giant,
  561                                 &aha->sg_dmat) != 0)
  562                 goto error_exit;
  563 
  564         aha->init_level++;
  565 
  566         /* Perform initial CCB allocation */
  567         bzero(aha->aha_ccb_array, aha->max_ccbs * sizeof(struct aha_ccb));
  568         ahaallocccbs(aha);
  569 
  570         if (aha->num_ccbs == 0) {
  571                 device_printf(aha->dev,
  572                     "aha_init - Unable to allocate initial ccbs\n");
  573                 goto error_exit;
  574         }
  575 
  576         /*
  577          * Note that we are going and return (to probe)
  578          */
  579         return (0);
  580 
  581 error_exit:
  582 
  583         return (ENXIO);
  584 }
  585 
  586 int
  587 aha_attach(struct aha_softc *aha)
  588 {
  589         int tagged_dev_openings;
  590         struct cam_devq *devq;
  591 
  592         /*
  593          * We don't do tagged queueing, since the aha cards don't
  594          * support it.
  595          */
  596         tagged_dev_openings = 0;
  597 
  598         /*
  599          * Create the device queue for our SIM.
  600          */
  601         devq = cam_simq_alloc(aha->max_ccbs - 1);
  602         if (devq == NULL)
  603                 return (ENOMEM);
  604 
  605         /*
  606          * Construct our SIM entry
  607          */
  608         aha->sim = cam_sim_alloc(ahaaction, ahapoll, "aha", aha, aha->unit,
  609              &Giant, 2, tagged_dev_openings, devq);
  610         if (aha->sim == NULL) {
  611                 cam_simq_free(devq);
  612                 return (ENOMEM);
  613         }
  614         if (xpt_bus_register(aha->sim, aha->dev, 0) != CAM_SUCCESS) {
  615                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
  616                 return (ENXIO);
  617         }
  618         if (xpt_create_path(&aha->path, /*periph*/NULL, cam_sim_path(aha->sim),
  619             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  620                 xpt_bus_deregister(cam_sim_path(aha->sim));
  621                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
  622                 return (ENXIO);
  623         }
  624 
  625         return (0);
  626 }
  627 
  628 static void
  629 ahaallocccbs(struct aha_softc *aha)
  630 {
  631         struct aha_ccb *next_ccb;
  632         struct sg_map_node *sg_map;
  633         bus_addr_t physaddr;
  634         aha_sg_t *segs;
  635         int newcount;
  636         int i;
  637 
  638         next_ccb = &aha->aha_ccb_array[aha->num_ccbs];
  639 
  640         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
  641 
  642         if (sg_map == NULL)
  643                 return;
  644 
  645         /* Allocate S/G space for the next batch of CCBS */
  646         if (bus_dmamem_alloc(aha->sg_dmat, (void **)&sg_map->sg_vaddr,
  647             BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
  648                 free(sg_map, M_DEVBUF);
  649                 return;
  650         }
  651 
  652         SLIST_INSERT_HEAD(&aha->sg_maps, sg_map, links);
  653 
  654         bus_dmamap_load(aha->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
  655             PAGE_SIZE, ahamapsgs, aha, /*flags*/0);
  656 
  657         segs = sg_map->sg_vaddr;
  658         physaddr = sg_map->sg_physaddr;
  659 
  660         newcount = (PAGE_SIZE / (AHA_NSEG * sizeof(aha_sg_t)));
  661         for (i = 0; aha->num_ccbs < aha->max_ccbs && i < newcount; i++) {
  662                 int error;
  663 
  664                 next_ccb->sg_list = segs;
  665                 next_ccb->sg_list_phys = physaddr;
  666                 next_ccb->flags = ACCB_FREE;
  667                 error = bus_dmamap_create(aha->buffer_dmat, /*flags*/0,
  668                     &next_ccb->dmamap);
  669                 if (error != 0)
  670                         break;
  671                 SLIST_INSERT_HEAD(&aha->free_aha_ccbs, next_ccb, links);
  672                 segs += AHA_NSEG;
  673                 physaddr += (AHA_NSEG * sizeof(aha_sg_t));
  674                 next_ccb++;
  675                 aha->num_ccbs++;
  676         }
  677 
  678         /* Reserve a CCB for error recovery */
  679         if (aha->recovery_accb == NULL) {
  680                 aha->recovery_accb = SLIST_FIRST(&aha->free_aha_ccbs);
  681                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  682         }
  683 }
  684 
  685 static __inline void
  686 ahafreeccb(struct aha_softc *aha, struct aha_ccb *accb)
  687 {
  688         int s;
  689 
  690         s = splcam();
  691         if ((accb->flags & ACCB_ACTIVE) != 0)
  692                 LIST_REMOVE(&accb->ccb->ccb_h, sim_links.le);
  693         if (aha->resource_shortage != 0
  694             && (accb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
  695                 accb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  696                 aha->resource_shortage = FALSE;
  697         }
  698         accb->flags = ACCB_FREE;
  699         SLIST_INSERT_HEAD(&aha->free_aha_ccbs, accb, links);
  700         aha->active_ccbs--;
  701         splx(s);
  702 }
  703 
  704 static struct aha_ccb*
  705 ahagetccb(struct aha_softc *aha)
  706 {
  707         struct  aha_ccb* accb;
  708         int     s;
  709 
  710         s = splcam();
  711         if ((accb = SLIST_FIRST(&aha->free_aha_ccbs)) != NULL) {
  712                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  713                 aha->active_ccbs++;
  714         } else if (aha->num_ccbs < aha->max_ccbs) {
  715                 ahaallocccbs(aha);
  716                 accb = SLIST_FIRST(&aha->free_aha_ccbs);
  717                 if (accb == NULL)
  718                         device_printf(aha->dev, "Can't malloc ACCB\n");
  719                 else {
  720                         SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  721                         aha->active_ccbs++;
  722                 }
  723         }
  724         splx(s);
  725 
  726         return (accb);
  727 }
  728 
  729 static void
  730 ahaaction(struct cam_sim *sim, union ccb *ccb)
  731 {
  732         struct  aha_softc *aha;
  733         int s;
  734 
  735         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahaaction\n"));
  736 
  737         aha = (struct aha_softc *)cam_sim_softc(sim);
  738 
  739         switch (ccb->ccb_h.func_code) {
  740         /* Common cases first */
  741         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
  742         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */        {
  743                 struct  aha_ccb *accb;
  744                 struct  aha_hccb *hccb;
  745 
  746                 /*
  747                  * Get an accb to use.
  748                  */
  749                 if ((accb = ahagetccb(aha)) == NULL) {
  750                         s = splcam();
  751                         aha->resource_shortage = TRUE;
  752                         splx(s);
  753                         xpt_freeze_simq(aha->sim, /*count*/1);
  754                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
  755                         xpt_done(ccb);
  756                         return;
  757                 }
  758                 hccb = &accb->hccb;
  759 
  760                 /*
  761                  * So we can find the ACCB when an abort is requested
  762                  */
  763                 accb->ccb = ccb;
  764                 ccb->ccb_h.ccb_accb_ptr = accb;
  765                 ccb->ccb_h.ccb_aha_ptr = aha;
  766 
  767                 /*
  768                  * Put all the arguments for the xfer in the accb
  769                  */
  770                 hccb->target = ccb->ccb_h.target_id;
  771                 hccb->lun = ccb->ccb_h.target_lun;
  772                 hccb->ahastat = 0;
  773                 hccb->sdstat = 0;
  774 
  775                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
  776                         struct ccb_scsiio *csio;
  777                         struct ccb_hdr *ccbh;
  778 
  779                         csio = &ccb->csio;
  780                         ccbh = &csio->ccb_h;
  781                         hccb->opcode = aha->ccb_ccb_opcode;
  782                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) != 0;
  783                         hccb->dataout = (ccb->ccb_h.flags & CAM_DIR_OUT) != 0;
  784                         hccb->cmd_len = csio->cdb_len;
  785                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
  786                                 ccb->ccb_h.status = CAM_REQ_INVALID;
  787                                 ahafreeccb(aha, accb);
  788                                 xpt_done(ccb);
  789                                 return;
  790                         }
  791                         hccb->sense_len = csio->sense_len;
  792                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
  793                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
  794                                         bcopy(csio->cdb_io.cdb_ptr,
  795                                               hccb->scsi_cdb, hccb->cmd_len);
  796                                 } else {
  797                                         /* I guess I could map it in... */
  798                                         ccbh->status = CAM_REQ_INVALID;
  799                                         ahafreeccb(aha, accb);
  800                                         xpt_done(ccb);
  801                                         return;
  802                                 }
  803                         } else {
  804                                 bcopy(csio->cdb_io.cdb_bytes,
  805                                       hccb->scsi_cdb, hccb->cmd_len);
  806                         }
  807                         /*
  808                          * If we have any data to send with this command,
  809                          * map it into bus space.
  810                          */
  811                         /* Only use S/G if there is a transfer */
  812                         if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
  813                                 if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
  814                                         /*
  815                                          * We've been given a pointer
  816                                          * to a single buffer.
  817                                          */
  818                                         if ((ccbh->flags & CAM_DATA_PHYS)==0) {
  819                                                 int error;
  820 
  821                                                 s = splsoftvm();
  822                                                 error = bus_dmamap_load(
  823                                                     aha->buffer_dmat,
  824                                                     accb->dmamap,
  825                                                     csio->data_ptr,
  826                                                     csio->dxfer_len,
  827                                                     ahaexecuteccb,
  828                                                     accb,
  829                                                     /*flags*/0);
  830                                                 if (error == EINPROGRESS) {
  831                                                         /*
  832                                                          * So as to maintain
  833                                                          * ordering, freeze the
  834                                                          * controller queue
  835                                                          * until our mapping is
  836                                                          * returned.
  837                                                          */
  838                                                         xpt_freeze_simq(aha->sim,
  839                                                                         1);
  840                                                         csio->ccb_h.status |=
  841                                                             CAM_RELEASE_SIMQ;
  842                                                 }
  843                                                 splx(s);
  844                                         } else {
  845                                                 struct bus_dma_segment seg;
  846 
  847                                                 /* Pointer to physical buffer */
  848                                                 seg.ds_addr =
  849                                                     (bus_addr_t)csio->data_ptr;
  850                                                 seg.ds_len = csio->dxfer_len;
  851                                                 ahaexecuteccb(accb, &seg, 1, 0);
  852                                         }
  853                                 } else {
  854                                         struct bus_dma_segment *segs;
  855 
  856                                         if ((ccbh->flags & CAM_DATA_PHYS) != 0)
  857                                                 panic("ahaaction - Physical "
  858                                                       "segment pointers "
  859                                                       "unsupported");
  860 
  861                                         if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
  862                                                 panic("ahaaction - Virtual "
  863                                                       "segment addresses "
  864                                                       "unsupported");
  865 
  866                                         /* Just use the segments provided */
  867                                         segs = (struct bus_dma_segment *)
  868                                             csio->data_ptr;
  869                                         ahaexecuteccb(accb, segs,
  870                                                      csio->sglist_cnt, 0);
  871                                 }
  872                         } else {
  873                                 ahaexecuteccb(accb, NULL, 0, 0);
  874                         }
  875                 } else {
  876                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
  877                         /* No data transfer */
  878                         hccb->datain = TRUE;
  879                         hccb->dataout = TRUE;
  880                         hccb->cmd_len = 0;
  881                         hccb->sense_len = 0;
  882                         ahaexecuteccb(accb, NULL, 0, 0);
  883                 }
  884                 break;
  885         }
  886         case XPT_EN_LUN:                /* Enable LUN as a target */
  887         case XPT_TARGET_IO:             /* Execute target I/O request */
  888         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
  889         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
  890         case XPT_ABORT:                 /* Abort the specified CCB */
  891                 /* XXX Implement */
  892                 ccb->ccb_h.status = CAM_REQ_INVALID;
  893                 xpt_done(ccb);
  894                 break;
  895         case XPT_SET_TRAN_SETTINGS:
  896                 /* XXX Implement */
  897                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
  898                 xpt_done(ccb);
  899                 break;
  900         case XPT_GET_TRAN_SETTINGS:
  901         /* Get default/user set transfer settings for the target */
  902         {
  903                 struct  ccb_trans_settings *cts = &ccb->cts;
  904                 u_int   target_mask = 0x01 << ccb->ccb_h.target_id;
  905                 struct ccb_trans_settings_scsi *scsi =
  906                     &cts->proto_specific.scsi;
  907                 struct ccb_trans_settings_spi *spi =
  908                     &cts->xport_specific.spi;
  909 
  910                 cts->protocol = PROTO_SCSI;
  911                 cts->protocol_version = SCSI_REV_2;
  912                 cts->transport = XPORT_SPI;
  913                 cts->transport_version = 2;
  914                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
  915                         spi->flags = 0;
  916                         if ((aha->disc_permitted & target_mask) != 0)
  917                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
  918                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
  919                         if ((aha->sync_permitted & target_mask) != 0) {
  920                                 if (aha->boardid >= BOARD_1542CF)
  921                                         spi->sync_period = 25;
  922                                 else
  923                                         spi->sync_period = 50;
  924                         } else {
  925                                 spi->sync_period = 0;
  926                         }
  927 
  928                         if (spi->sync_period != 0)
  929                                 spi->sync_offset = 15;
  930 
  931                         spi->valid = CTS_SPI_VALID_SYNC_RATE
  932                                    | CTS_SPI_VALID_SYNC_OFFSET
  933                                    | CTS_SPI_VALID_BUS_WIDTH
  934                                    | CTS_SPI_VALID_DISC;
  935                         scsi->valid = CTS_SCSI_VALID_TQ;
  936                 } else {
  937                         ahafetchtransinfo(aha, cts);
  938                 }
  939 
  940                 ccb->ccb_h.status = CAM_REQ_CMP;
  941                 xpt_done(ccb);
  942                 break;
  943         }
  944         case XPT_CALC_GEOMETRY:
  945         {
  946                 struct    ccb_calc_geometry *ccg;
  947                 uint32_t size_mb;
  948                 uint32_t secs_per_cylinder;
  949 
  950                 ccg = &ccb->ccg;
  951                 size_mb = ccg->volume_size
  952                         / ((1024L * 1024L) / ccg->block_size);
  953                 if (size_mb >= 1024 && (aha->extended_trans != 0)) {
  954                         if (size_mb >= 2048) {
  955                                 ccg->heads = 255;
  956                                 ccg->secs_per_track = 63;
  957                         } else {
  958                                 ccg->heads = 128;
  959                                 ccg->secs_per_track = 32;
  960                         }
  961                 } else {
  962                         ccg->heads = 64;
  963                         ccg->secs_per_track = 32;
  964                 }
  965                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
  966                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
  967                 ccb->ccb_h.status = CAM_REQ_CMP;
  968                 xpt_done(ccb);
  969                 break;
  970         }
  971         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
  972                 ahareset(aha, /*hardreset*/TRUE);
  973                 ccb->ccb_h.status = CAM_REQ_CMP;
  974                 xpt_done(ccb);
  975                 break;
  976         case XPT_TERM_IO:               /* Terminate the I/O process */
  977                 /* XXX Implement */
  978                 ccb->ccb_h.status = CAM_REQ_INVALID;
  979                 xpt_done(ccb);
  980                 break;
  981         case XPT_PATH_INQ:              /* Path routing inquiry */
  982         {
  983                 struct ccb_pathinq *cpi = &ccb->cpi;
  984 
  985                 cpi->version_num = 1; /* XXX??? */
  986                 cpi->hba_inquiry = PI_SDTR_ABLE;
  987                 cpi->target_sprt = 0;
  988                 cpi->hba_misc = 0;
  989                 cpi->hba_eng_cnt = 0;
  990                 cpi->max_target = 7;
  991                 cpi->max_lun = 7;
  992                 cpi->initiator_id = aha->scsi_id;
  993                 cpi->bus_id = cam_sim_bus(sim);
  994                 cpi->base_transfer_speed = 3300;
  995                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  996                 strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
  997                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
  998                 cpi->unit_number = cam_sim_unit(sim);
  999                 cpi->transport = XPORT_SPI;
 1000                 cpi->transport_version = 2;
 1001                 cpi->protocol = PROTO_SCSI;
 1002                 cpi->protocol_version = SCSI_REV_2;
 1003                 cpi->ccb_h.status = CAM_REQ_CMP;
 1004                 xpt_done(ccb);
 1005                 break;
 1006         }
 1007         default:
 1008                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1009                 xpt_done(ccb);
 1010                 break;
 1011         }
 1012 }
 1013 
 1014 static void
 1015 ahaexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1016 {
 1017         struct   aha_ccb *accb;
 1018         union    ccb *ccb;
 1019         struct   aha_softc *aha;
 1020         int      s;
 1021         uint32_t paddr;
 1022 
 1023         accb = (struct aha_ccb *)arg;
 1024         ccb = accb->ccb;
 1025         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
 1026 
 1027         if (error != 0) {
 1028                 if (error != EFBIG)
 1029                         device_printf(aha->dev,
 1030                             "Unexepected error 0x%x returned from "
 1031                             "bus_dmamap_load\n", error);
 1032                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 1033                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1034                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 1035                 }
 1036                 ahafreeccb(aha, accb);
 1037                 xpt_done(ccb);
 1038                 return;
 1039         }
 1040 
 1041         if (nseg != 0) {
 1042                 aha_sg_t *sg;
 1043                 bus_dma_segment_t *end_seg;
 1044                 bus_dmasync_op_t op;
 1045 
 1046                 end_seg = dm_segs + nseg;
 1047 
 1048                 /* Copy the segments into our SG list */
 1049                 sg = accb->sg_list;
 1050                 while (dm_segs < end_seg) {
 1051                         ahautoa24(dm_segs->ds_len, sg->len);
 1052                         ahautoa24(dm_segs->ds_addr, sg->addr);
 1053                         sg++;
 1054                         dm_segs++;
 1055                 }
 1056 
 1057                 if (nseg > 1) {
 1058                         accb->hccb.opcode = aha->ccb_sg_opcode;
 1059                         ahautoa24((sizeof(aha_sg_t) * nseg),
 1060                             accb->hccb.data_len);
 1061                         ahautoa24(accb->sg_list_phys, accb->hccb.data_addr);
 1062                 } else {
 1063                         bcopy(accb->sg_list->len, accb->hccb.data_len, 3);
 1064                         bcopy(accb->sg_list->addr, accb->hccb.data_addr, 3);
 1065                 }
 1066 
 1067                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1068                         op = BUS_DMASYNC_PREREAD;
 1069                 else
 1070                         op = BUS_DMASYNC_PREWRITE;
 1071 
 1072                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
 1073 
 1074         } else {
 1075                 accb->hccb.opcode = INITIATOR_CCB;
 1076                 ahautoa24(0, accb->hccb.data_len);
 1077                 ahautoa24(0, accb->hccb.data_addr);
 1078         }
 1079 
 1080         s = splcam();
 1081 
 1082         /*
 1083          * Last time we need to check if this CCB needs to
 1084          * be aborted.
 1085          */
 1086         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 1087                 if (nseg != 0)
 1088                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1089                 ahafreeccb(aha, accb);
 1090                 xpt_done(ccb);
 1091                 splx(s);
 1092                 return;
 1093         }
 1094 
 1095         accb->flags = ACCB_ACTIVE;
 1096         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1097         LIST_INSERT_HEAD(&aha->pending_ccbs, &ccb->ccb_h, sim_links.le);
 1098 
 1099         ccb->ccb_h.timeout_ch = timeout(ahatimeout, (caddr_t)accb,
 1100             (ccb->ccb_h.timeout * hz) / 1000);
 1101 
 1102         /* Tell the adapter about this command */
 1103         if (aha->cur_outbox->action_code != AMBO_FREE) {
 1104                 /*
 1105                  * We should never encounter a busy mailbox.
 1106                  * If we do, warn the user, and treat it as
 1107                  * a resource shortage.  If the controller is
 1108                  * hung, one of the pending transactions will
 1109                  * timeout causing us to start recovery operations.
 1110                  */
 1111                 device_printf(aha->dev,
 1112                     "Encountered busy mailbox with %d out of %d "
 1113                     "commands active!!!", aha->active_ccbs, aha->max_ccbs);
 1114                 untimeout(ahatimeout, accb, ccb->ccb_h.timeout_ch);
 1115                 if (nseg != 0)
 1116                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1117                 ahafreeccb(aha, accb);
 1118                 aha->resource_shortage = TRUE;
 1119                 xpt_freeze_simq(aha->sim, /*count*/1);
 1120                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1121                 xpt_done(ccb);
 1122                 return;
 1123         }
 1124         paddr = ahaccbvtop(aha, accb);
 1125         ahautoa24(paddr, aha->cur_outbox->ccb_addr);
 1126         aha->cur_outbox->action_code = AMBO_START;
 1127         aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
 1128 
 1129         ahanextoutbox(aha);
 1130         splx(s);
 1131 }
 1132 
 1133 void
 1134 aha_intr(void *arg)
 1135 {
 1136         struct  aha_softc *aha;
 1137         u_int   intstat;
 1138         uint32_t paddr;
 1139 
 1140         aha = (struct aha_softc *)arg;
 1141         while (((intstat = aha_inb(aha, INTSTAT_REG)) & INTR_PENDING) != 0) {
 1142                 if ((intstat & CMD_COMPLETE) != 0) {
 1143                         aha->latched_status = aha_inb(aha, STATUS_REG);
 1144                         aha->command_cmp = TRUE;
 1145                 }
 1146 
 1147                 aha_outb(aha, CONTROL_REG, RESET_INTR);
 1148 
 1149                 if ((intstat & IMB_LOADED) != 0) {
 1150                         while (aha->cur_inbox->comp_code != AMBI_FREE) {
 1151                                 paddr = aha_a24tou(aha->cur_inbox->ccb_addr);
 1152                                 ahadone(aha, ahaccbptov(aha, paddr),
 1153                                     aha->cur_inbox->comp_code);
 1154                                 aha->cur_inbox->comp_code = AMBI_FREE;
 1155                                 ahanextinbox(aha);
 1156                         }
 1157                 }
 1158 
 1159                 if ((intstat & SCSI_BUS_RESET) != 0) {
 1160                         ahareset(aha, /*hardreset*/FALSE);
 1161                 }
 1162         }
 1163 }
 1164 
 1165 static void
 1166 ahadone(struct aha_softc *aha, struct aha_ccb *accb, aha_mbi_comp_code_t comp_code)
 1167 {
 1168         union  ccb        *ccb;
 1169         struct ccb_scsiio *csio;
 1170 
 1171         ccb = accb->ccb;
 1172         csio = &accb->ccb->csio;
 1173 
 1174         if ((accb->flags & ACCB_ACTIVE) == 0) {
 1175                 device_printf(aha->dev, 
 1176                     "ahadone - Attempt to free non-active ACCB %p\n",
 1177                     (void *)accb);
 1178                 return;
 1179         }
 1180 
 1181         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1182                 bus_dmasync_op_t op;
 1183 
 1184                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1185                         op = BUS_DMASYNC_POSTREAD;
 1186                 else
 1187                         op = BUS_DMASYNC_POSTWRITE;
 1188                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
 1189                 bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1190         }
 1191 
 1192         if (accb == aha->recovery_accb) {
 1193                 /*
 1194                  * The recovery ACCB does not have a CCB associated
 1195                  * with it, so short circuit the normal error handling.
 1196                  * We now traverse our list of pending CCBs and process
 1197                  * any that were terminated by the recovery CCBs action.
 1198                  * We also reinstate timeouts for all remaining, pending,
 1199                  * CCBs.
 1200                  */
 1201                 struct cam_path *path;
 1202                 struct ccb_hdr *ccb_h;
 1203                 cam_status error;
 1204 
 1205                 /* Notify all clients that a BDR occured */
 1206                 error = xpt_create_path(&path, /*periph*/NULL,
 1207                     cam_sim_path(aha->sim), accb->hccb.target,
 1208                     CAM_LUN_WILDCARD);
 1209 
 1210                 if (error == CAM_REQ_CMP)
 1211                         xpt_async(AC_SENT_BDR, path, NULL);
 1212 
 1213                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
 1214                 while (ccb_h != NULL) {
 1215                         struct aha_ccb *pending_accb;
 1216 
 1217                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1218                         if (pending_accb->hccb.target == accb->hccb.target) {
 1219                                 pending_accb->hccb.ahastat = AHASTAT_HA_BDR;
 1220                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1221                                 ahadone(aha, pending_accb, AMBI_ERROR);
 1222                         } else {
 1223                                 ccb_h->timeout_ch = timeout(ahatimeout,
 1224                                     (caddr_t)pending_accb,
 1225                                     (ccb_h->timeout * hz) / 1000);
 1226                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1227                         }
 1228                 }
 1229                 device_printf(aha->dev, "No longer in timeout\n");
 1230                 return;
 1231         }
 1232 
 1233         untimeout(ahatimeout, accb, ccb->ccb_h.timeout_ch);
 1234 
 1235         switch (comp_code) {
 1236         case AMBI_FREE:
 1237                 device_printf(aha->dev,
 1238                     "ahadone - CCB completed with free status!\n");
 1239                 break;
 1240         case AMBI_NOT_FOUND:
 1241                 device_printf(aha->dev,
 1242                     "ahadone - CCB Abort failed to find CCB\n");
 1243                 break;
 1244         case AMBI_ABORT:
 1245         case AMBI_ERROR:
 1246                 /* An error occured */
 1247                 if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
 1248                         csio->resid = 0;
 1249                 else
 1250                         csio->resid = aha_a24tou(accb->hccb.data_len);
 1251                 switch(accb->hccb.ahastat) {
 1252                 case AHASTAT_DATARUN_ERROR:
 1253                 {
 1254                         if (csio->resid <= 0) {
 1255                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
 1256                                 break;
 1257                         }
 1258                         /* FALLTHROUGH */
 1259                 }
 1260                 case AHASTAT_NOERROR:
 1261                         csio->scsi_status = accb->hccb.sdstat;
 1262                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 1263                         switch(csio->scsi_status) {
 1264                         case SCSI_STATUS_CHECK_COND:
 1265                         case SCSI_STATUS_CMD_TERMINATED:
 1266                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 1267                                 /*
 1268                                  * The aha writes the sense data at different
 1269                                  * offsets based on the scsi cmd len
 1270                                  */
 1271                                 bcopy((caddr_t) &accb->hccb.scsi_cdb +
 1272                                     accb->hccb.cmd_len,
 1273                                     (caddr_t) &csio->sense_data,
 1274                                     accb->hccb.sense_len);
 1275                                 break;
 1276                         default:
 1277                                 break;
 1278                         case SCSI_STATUS_OK:
 1279                                 csio->ccb_h.status = CAM_REQ_CMP;
 1280                                 break;
 1281                         }
 1282                         break;
 1283                 case AHASTAT_SELTIMEOUT:
 1284                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
 1285                         break;
 1286                 case AHASTAT_UNEXPECTED_BUSFREE:
 1287                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
 1288                         break;
 1289                 case AHASTAT_INVALID_PHASE:
 1290                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
 1291                         break;
 1292                 case AHASTAT_INVALID_ACTION_CODE:
 1293                         panic("%s: Inavlid Action code", aha_name(aha));
 1294                         break;
 1295                 case AHASTAT_INVALID_OPCODE:
 1296                         if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
 1297                                 panic("%s: Invalid CCB Opcode %x hccb = %p",
 1298                                     aha_name(aha), accb->hccb.opcode,
 1299                                     &accb->hccb);
 1300                         device_printf(aha->dev,
 1301                             "AHA-1540A compensation failed\n");
 1302                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1303                         csio->ccb_h.status = CAM_REQUEUE_REQ;
 1304                         break;
 1305                 case AHASTAT_LINKED_CCB_LUN_MISMATCH:
 1306                         /* We don't even support linked commands... */
 1307                         panic("%s: Linked CCB Lun Mismatch", aha_name(aha));
 1308                         break;
 1309                 case AHASTAT_INVALID_CCB_OR_SG_PARAM:
 1310                         panic("%s: Invalid CCB or SG list", aha_name(aha));
 1311                         break;
 1312                 case AHASTAT_HA_SCSI_BUS_RESET:
 1313                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
 1314                             != CAM_CMD_TIMEOUT)
 1315                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
 1316                         break;
 1317                 case AHASTAT_HA_BDR:
 1318                         if ((accb->flags & ACCB_DEVICE_RESET) == 0)
 1319                                 csio->ccb_h.status = CAM_BDR_SENT;
 1320                         else
 1321                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
 1322                         break;
 1323                 }
 1324                 if (csio->ccb_h.status != CAM_REQ_CMP) {
 1325                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
 1326                         csio->ccb_h.status |= CAM_DEV_QFRZN;
 1327                 }
 1328                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
 1329                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1330                 ahafreeccb(aha, accb);
 1331                 xpt_done(ccb);
 1332                 break;
 1333         case AMBI_OK:
 1334                 /* All completed without incident */
 1335                 /* XXX DO WE NEED TO COPY SENSE BYTES HERE???? XXX */
 1336                 /* I don't think so since it works???? */
 1337                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1338                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
 1339                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1340                 ahafreeccb(aha, accb);
 1341                 xpt_done(ccb);
 1342                 break;
 1343         }
 1344 }
 1345 
 1346 static int
 1347 ahareset(struct aha_softc* aha, int hard_reset)
 1348 {
 1349         struct   ccb_hdr *ccb_h;
 1350         u_int    status;
 1351         u_int    timeout;
 1352         uint8_t reset_type;
 1353 
 1354         if (hard_reset != 0)
 1355                 reset_type = HARD_RESET;
 1356         else
 1357                 reset_type = SOFT_RESET;
 1358         aha_outb(aha, CONTROL_REG, reset_type);
 1359 
 1360         /* Wait 5sec. for Diagnostic start */
 1361         timeout = 5 * 10000;
 1362         while (--timeout) {
 1363                 status = aha_inb(aha, STATUS_REG);
 1364                 if ((status & DIAG_ACTIVE) != 0)
 1365                         break;
 1366                 DELAY(100);
 1367         }
 1368         if (timeout == 0) {
 1369                 PRVERB((aha->dev, "ahareset - Diagnostic Active failed to "
 1370                     "assert. status = %#x\n", status));
 1371                 return (ETIMEDOUT);
 1372         }
 1373 
 1374         /* Wait 10sec. for Diagnostic end */
 1375         timeout = 10 * 10000;
 1376         while (--timeout) {
 1377                 status = aha_inb(aha, STATUS_REG);
 1378                 if ((status & DIAG_ACTIVE) == 0)
 1379                         break;
 1380                 DELAY(100);
 1381         }
 1382         if (timeout == 0) {
 1383                 panic("%s: ahareset - Diagnostic Active failed to drop. "
 1384                     "status = 0x%x\n", aha_name(aha), status);
 1385                 return (ETIMEDOUT);
 1386         }
 1387 
 1388         /* Wait for the host adapter to become ready or report a failure */
 1389         timeout = 10000;
 1390         while (--timeout) {
 1391                 status = aha_inb(aha, STATUS_REG);
 1392                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
 1393                         break;
 1394                 DELAY(100);
 1395         }
 1396         if (timeout == 0) {
 1397                 device_printf(aha->dev, "ahareset - Host adapter failed to "
 1398                     "come ready. status = 0x%x\n", status);
 1399                 return (ETIMEDOUT);
 1400         }
 1401 
 1402         /* If the diagnostics failed, tell the user */
 1403         if ((status & DIAG_FAIL) != 0
 1404          || (status & HA_READY) == 0) {
 1405                 device_printf(aha->dev, "ahareset - Adapter failed diag\n");
 1406 
 1407                 if ((status & DATAIN_REG_READY) != 0)
 1408                         device_printf(aha->dev, "ahareset - Host Adapter "
 1409                             "Error code = 0x%x\n", aha_inb(aha, DATAIN_REG));
 1410                 return (ENXIO);
 1411         }
 1412 
 1413         /* If we've attached to the XPT, tell it about the event */
 1414         if (aha->path != NULL)
 1415                 xpt_async(AC_BUS_RESET, aha->path, NULL);
 1416 
 1417         /*
 1418          * Perform completion processing for all outstanding CCBs.
 1419          */
 1420         while ((ccb_h = LIST_FIRST(&aha->pending_ccbs)) != NULL) {
 1421                 struct aha_ccb *pending_accb;
 1422 
 1423                 pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1424                 pending_accb->hccb.ahastat = AHASTAT_HA_SCSI_BUS_RESET;
 1425                 ahadone(aha, pending_accb, AMBI_ERROR);
 1426         }
 1427 
 1428         /* If we've allocated mailboxes, initialize them */
 1429         /* Must be done after we've aborted our queue, or aha_cmd fails */
 1430         if (aha->init_level > 4)
 1431                 ahainitmboxes(aha);
 1432 
 1433         return (0);
 1434 }
 1435 
 1436 /*
 1437  * Send a command to the adapter.
 1438  */
 1439 int
 1440 aha_cmd(struct aha_softc *aha, aha_op_t opcode, uint8_t *params,
 1441         u_int param_len, uint8_t *reply_data, u_int reply_len,
 1442         u_int cmd_timeout)
 1443 {
 1444         u_int   timeout;
 1445         u_int   status;
 1446         u_int   saved_status;
 1447         u_int   intstat;
 1448         u_int   reply_buf_size;
 1449         int     s;
 1450         int     cmd_complete;
 1451         int     error;
 1452 
 1453         /* No data returned to start */
 1454         reply_buf_size = reply_len;
 1455         reply_len = 0;
 1456         intstat = 0;
 1457         cmd_complete = 0;
 1458         saved_status = 0;
 1459         error = 0;
 1460 
 1461         /*
 1462          * All commands except for the "start mailbox" and the "enable
 1463          * outgoing mailbox read interrupt" commands cannot be issued
 1464          * while there are pending transactions.  Freeze our SIMQ
 1465          * and wait for all completions to occur if necessary.
 1466          */
 1467         timeout = 10000;
 1468         s = splcam();
 1469         while (LIST_FIRST(&aha->pending_ccbs) != NULL && --timeout) {
 1470                 /* Fire the interrupt handler in case interrupts are blocked */
 1471                 aha_intr(aha);
 1472                 splx(s);
 1473                 DELAY(10);
 1474                 s = splcam();
 1475         }
 1476         splx(s);
 1477 
 1478         if (timeout == 0) {
 1479                 device_printf(aha->dev, 
 1480                     "aha_cmd: Timeout waiting for adapter idle\n");
 1481                 return (ETIMEDOUT);
 1482         }
 1483         aha->command_cmp = 0;
 1484         /*
 1485          * Wait up to 10 sec. for the adapter to become
 1486          * ready to accept commands.
 1487          */
 1488         timeout = 100000;
 1489         while (--timeout) {
 1490                 status = aha_inb(aha, STATUS_REG);
 1491                 if ((status & HA_READY) != 0 && (status & CMD_REG_BUSY) == 0)
 1492                         break;
 1493                 /*
 1494                  * Throw away any pending data which may be
 1495                  * left over from earlier commands that we
 1496                  * timedout on.
 1497                  */
 1498                 if ((status & DATAIN_REG_READY) != 0)
 1499                         (void)aha_inb(aha, DATAIN_REG);
 1500                 DELAY(100);
 1501         }
 1502         if (timeout == 0) {
 1503                 device_printf(aha->dev, "aha_cmd: Timeout waiting for adapter"
 1504                     " ready, status = 0x%x\n", status);
 1505                 return (ETIMEDOUT);
 1506         }
 1507 
 1508         /*
 1509          * Send the opcode followed by any necessary parameter bytes.
 1510          */
 1511         aha_outb(aha, COMMAND_REG, opcode);
 1512 
 1513         /*
 1514          * Wait for up to 1sec to get the parameter list sent
 1515          */
 1516         timeout = 10000;
 1517         while (param_len && --timeout) {
 1518                 DELAY(100);
 1519                 s = splcam();
 1520                 status = aha_inb(aha, STATUS_REG);
 1521                 intstat = aha_inb(aha, INTSTAT_REG);
 1522                 splx(s);
 1523 
 1524                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1525                  == (INTR_PENDING|CMD_COMPLETE)) {
 1526                         saved_status = status;
 1527                         cmd_complete = 1;
 1528                         break;
 1529                 }
 1530 
 1531                 if (aha->command_cmp != 0) {
 1532                         saved_status = aha->latched_status;
 1533                         cmd_complete = 1;
 1534                         break;
 1535                 }
 1536                 if ((status & DATAIN_REG_READY) != 0)
 1537                         break;
 1538                 if ((status & CMD_REG_BUSY) == 0) {
 1539                         aha_outb(aha, COMMAND_REG, *params++);
 1540                         param_len--;
 1541                         timeout = 10000;
 1542                 }
 1543         }
 1544         if (timeout == 0) {
 1545                 device_printf(aha->dev, "aha_cmd: Timeout sending parameters, "
 1546                     "status = 0x%x\n", status);
 1547                 error = ETIMEDOUT;
 1548         }
 1549 
 1550         /*
 1551          * For all other commands, we wait for any output data
 1552          * and the final comand completion interrupt.
 1553          */
 1554         while (cmd_complete == 0 && --cmd_timeout) {
 1555 
 1556                 s = splcam();
 1557                 status = aha_inb(aha, STATUS_REG);
 1558                 intstat = aha_inb(aha, INTSTAT_REG);
 1559                 splx(s);
 1560 
 1561                 if (aha->command_cmp != 0) {
 1562                         cmd_complete = 1;
 1563                         saved_status = aha->latched_status;
 1564                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1565                         == (INTR_PENDING|CMD_COMPLETE)) {
 1566                         /*
 1567                          * Our poll (in case interrupts are blocked)
 1568                          * saw the CMD_COMPLETE interrupt.
 1569                          */
 1570                         cmd_complete = 1;
 1571                         saved_status = status;
 1572                 }
 1573                 if ((status & DATAIN_REG_READY) != 0) {
 1574                         uint8_t data;
 1575 
 1576                         data = aha_inb(aha, DATAIN_REG);
 1577                         if (reply_len < reply_buf_size) {
 1578                                 *reply_data++ = data;
 1579                         } else {
 1580                                 device_printf(aha->dev, 
 1581                                     "aha_cmd - Discarded reply data "
 1582                                     "byte for opcode 0x%x\n", opcode);
 1583                         }
 1584                         /*
 1585                          * Reset timeout to ensure at least a second
 1586                          * between response bytes.
 1587                          */
 1588                         cmd_timeout = MAX(cmd_timeout, 10000);
 1589                         reply_len++;
 1590                 }
 1591                 DELAY(100);
 1592         }
 1593         if (cmd_timeout == 0) {
 1594                 device_printf(aha->dev, "aha_cmd: Timeout: status = 0x%x, "
 1595                     "intstat = 0x%x, reply_len = %d\n", status, intstat,
 1596                     reply_len);
 1597                 return (ETIMEDOUT);
 1598         }
 1599 
 1600         /*
 1601          * Clear any pending interrupts.  Block interrupts so our
 1602          * interrupt handler is not re-entered.
 1603          */
 1604         s = splcam();
 1605         aha_intr(aha);
 1606         splx(s);
 1607 
 1608         if (error != 0)
 1609                 return (error);
 1610 
 1611         /*
 1612          * If the command was rejected by the controller, tell the caller.
 1613          */
 1614         if ((saved_status & CMD_INVALID) != 0) {
 1615                 PRVERB((aha->dev, "Invalid Command 0x%x\n", opcode));
 1616                 /*
 1617                  * Some early adapters may not recover properly from
 1618                  * an invalid command.  If it appears that the controller
 1619                  * has wedged (i.e. status was not cleared by our interrupt
 1620                  * reset above), perform a soft reset.
 1621                  */
 1622                 DELAY(1000);
 1623                 status = aha_inb(aha, STATUS_REG);
 1624                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
 1625                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
 1626                  || (status & (HA_READY|INIT_REQUIRED))
 1627                   != (HA_READY|INIT_REQUIRED))
 1628                         ahareset(aha, /*hard_reset*/FALSE);
 1629                 return (EINVAL);
 1630         }
 1631 
 1632         if (param_len > 0) {
 1633                 /* The controller did not accept the full argument list */
 1634                 PRVERB((aha->dev, "Controller did not accept full argument "
 1635                     "list (%d > 0)\n", param_len));
 1636                 return (E2BIG);
 1637         }
 1638 
 1639         if (reply_len != reply_buf_size) {
 1640                 /* Too much or too little data received */
 1641                 PRVERB((aha->dev, "data received mismatch (%d != %d)\n",
 1642                     reply_len, reply_buf_size));
 1643                 return (EMSGSIZE);
 1644         }
 1645 
 1646         /* We were successful */
 1647         return (0);
 1648 }
 1649 
 1650 static int
 1651 ahainitmboxes(struct aha_softc *aha)
 1652 {
 1653         int error;
 1654         init_24b_mbox_params_t init_mbox;
 1655 
 1656         bzero(aha->in_boxes, sizeof(aha_mbox_in_t) * aha->num_boxes);
 1657         bzero(aha->out_boxes, sizeof(aha_mbox_out_t) * aha->num_boxes);
 1658         aha->cur_inbox = aha->in_boxes;
 1659         aha->last_inbox = aha->in_boxes + aha->num_boxes - 1;
 1660         aha->cur_outbox = aha->out_boxes;
 1661         aha->last_outbox = aha->out_boxes + aha->num_boxes - 1;
 1662 
 1663         /* Tell the adapter about them */
 1664         init_mbox.num_mboxes = aha->num_boxes;
 1665         ahautoa24(aha->mailbox_physbase, init_mbox.base_addr);
 1666         error = aha_cmd(aha, AOP_INITIALIZE_MBOX, (uint8_t *)&init_mbox,
 1667             /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
 1668             /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
 1669 
 1670         if (error != 0)
 1671                 printf("ahainitmboxes: Initialization command failed\n");
 1672         return (error);
 1673 }
 1674 
 1675 /*
 1676  * Update the XPT's idea of the negotiated transfer
 1677  * parameters for a particular target.
 1678  */
 1679 static void
 1680 ahafetchtransinfo(struct aha_softc *aha, struct ccb_trans_settings* cts)
 1681 {
 1682         setup_data_t    setup_info;
 1683         u_int           target;
 1684         u_int           targ_offset;
 1685         u_int           sync_period;
 1686         int             error;
 1687         uint8_t param;
 1688         targ_syncinfo_t sync_info;
 1689         struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
 1690 
 1691         target = cts->ccb_h.target_id;
 1692         targ_offset = (target & 0x7);
 1693 
 1694         /*
 1695          * Inquire Setup Information.  This command retreives
 1696          * the sync info for older models.
 1697          */
 1698         param = sizeof(setup_info);
 1699         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
 1700             (uint8_t*)&setup_info, sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
 1701 
 1702         if (error != 0) {
 1703                 device_printf(aha->dev,
 1704                     "ahafetchtransinfo - Inquire Setup Info Failed %d\n",
 1705                     error);
 1706                 return;
 1707         }
 1708 
 1709         sync_info = setup_info.syncinfo[targ_offset];
 1710 
 1711         if (sync_info.sync == 0)
 1712                 spi->sync_offset = 0;
 1713         else
 1714                 spi->sync_offset = sync_info.offset;
 1715 
 1716         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 1717 
 1718         if (aha->boardid >= BOARD_1542CF)
 1719                 sync_period = 1000;
 1720         else
 1721                 sync_period = 2000;
 1722         sync_period += 500 * sync_info.period;
 1723 
 1724         /* Convert ns value to standard SCSI sync rate */
 1725         if (spi->sync_offset != 0)
 1726                 spi->sync_period = scsi_calc_syncparam(sync_period);
 1727         else
 1728                 spi->sync_period = 0;
 1729 
 1730         spi->valid = CTS_SPI_VALID_SYNC_RATE
 1731                    | CTS_SPI_VALID_SYNC_OFFSET
 1732                    | CTS_SPI_VALID_BUS_WIDTH;
 1733         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
 1734 }
 1735 
 1736 static void
 1737 ahamapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1738 {
 1739         struct aha_softc* aha;
 1740 
 1741         aha = (struct aha_softc*)arg;
 1742         aha->mailbox_physbase = segs->ds_addr;
 1743 }
 1744 
 1745 static void
 1746 ahamapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1747 {
 1748         struct aha_softc* aha;
 1749 
 1750         aha = (struct aha_softc*)arg;
 1751         aha->aha_ccb_physbase = segs->ds_addr;
 1752 }
 1753 
 1754 static void
 1755 ahamapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1756 {
 1757 
 1758         struct aha_softc* aha;
 1759 
 1760         aha = (struct aha_softc*)arg;
 1761         SLIST_FIRST(&aha->sg_maps)->sg_physaddr = segs->ds_addr;
 1762 }
 1763 
 1764 static void
 1765 ahapoll(struct cam_sim *sim)
 1766 {
 1767         aha_intr(cam_sim_softc(sim));
 1768 }
 1769 
 1770 static void
 1771 ahatimeout(void *arg)
 1772 {
 1773         struct aha_ccb  *accb;
 1774         union  ccb      *ccb;
 1775         struct aha_softc *aha;
 1776         int              s;
 1777         uint32_t        paddr;
 1778         struct ccb_hdr *ccb_h;
 1779 
 1780         accb = (struct aha_ccb *)arg;
 1781         ccb = accb->ccb;
 1782         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
 1783         xpt_print_path(ccb->ccb_h.path);
 1784         printf("CCB %p - timed out\n", (void *)accb);
 1785 
 1786         s = splcam();
 1787 
 1788         if ((accb->flags & ACCB_ACTIVE) == 0) {
 1789                 xpt_print_path(ccb->ccb_h.path);
 1790                 printf("CCB %p - timed out CCB already completed\n",
 1791                     (void *)accb);
 1792                 splx(s);
 1793                 return;
 1794         }
 1795 
 1796         /*
 1797          * In order to simplify the recovery process, we ask the XPT
 1798          * layer to halt the queue of new transactions and we traverse
 1799          * the list of pending CCBs and remove their timeouts. This
 1800          * means that the driver attempts to clear only one error
 1801          * condition at a time.  In general, timeouts that occur
 1802          * close together are related anyway, so there is no benefit
 1803          * in attempting to handle errors in parrallel.  Timeouts will
 1804          * be reinstated when the recovery process ends.
 1805          */
 1806         if ((accb->flags & ACCB_DEVICE_RESET) == 0) {
 1807                 if ((accb->flags & ACCB_RELEASE_SIMQ) == 0) {
 1808                         xpt_freeze_simq(aha->sim, /*count*/1);
 1809                         accb->flags |= ACCB_RELEASE_SIMQ;
 1810                 }
 1811 
 1812                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
 1813                 while (ccb_h != NULL) {
 1814                         struct aha_ccb *pending_accb;
 1815 
 1816                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1817                         untimeout(ahatimeout, pending_accb, ccb_h->timeout_ch);
 1818                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1819                 }
 1820         }
 1821 
 1822         if ((accb->flags & ACCB_DEVICE_RESET) != 0
 1823          || aha->cur_outbox->action_code != AMBO_FREE) {
 1824                 /*
 1825                  * Try a full host adapter/SCSI bus reset.
 1826                  * We do this only if we have already attempted
 1827                  * to clear the condition with a BDR, or we cannot
 1828                  * attempt a BDR for lack of mailbox resources.
 1829                  */
 1830                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 1831                 ahareset(aha, /*hardreset*/TRUE);
 1832                 device_printf(aha->dev, "No longer in timeout\n");
 1833         } else {
 1834                 /*
 1835                  * Send a Bus Device Reset message:
 1836                  * The target that is holding up the bus may not
 1837                  * be the same as the one that triggered this timeout
 1838                  * (different commands have different timeout lengths),
 1839                  * but we have no way of determining this from our
 1840                  * timeout handler.  Our strategy here is to queue a
 1841                  * BDR message to the target of the timed out command.
 1842                  * If this fails, we'll get another timeout 2 seconds
 1843                  * later which will attempt a bus reset.
 1844                  */
 1845                 accb->flags |= ACCB_DEVICE_RESET;
 1846                 ccb->ccb_h.timeout_ch = timeout(ahatimeout, (caddr_t)accb, 2 * hz);
 1847                 aha->recovery_accb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
 1848 
 1849                 /* No Data Transfer */
 1850                 aha->recovery_accb->hccb.datain = TRUE;
 1851                 aha->recovery_accb->hccb.dataout = TRUE;
 1852                 aha->recovery_accb->hccb.ahastat = 0;
 1853                 aha->recovery_accb->hccb.sdstat = 0;
 1854                 aha->recovery_accb->hccb.target = ccb->ccb_h.target_id;
 1855 
 1856                 /* Tell the adapter about this command */
 1857                 paddr = ahaccbvtop(aha, aha->recovery_accb);
 1858                 ahautoa24(paddr, aha->cur_outbox->ccb_addr);
 1859                 aha->cur_outbox->action_code = AMBO_START;
 1860                 aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
 1861                 ahanextoutbox(aha);
 1862         }
 1863 
 1864         splx(s);
 1865 }
 1866 
 1867 int
 1868 aha_detach(struct aha_softc *aha)
 1869 {
 1870         xpt_async(AC_LOST_DEVICE, aha->path, NULL);
 1871         xpt_free_path(aha->path);
 1872         xpt_bus_deregister(cam_sim_path(aha->sim));
 1873         cam_sim_free(aha->sim, /*free_devq*/TRUE);
 1874         return (0);
 1875 }
 1876 MODULE_DEPEND(aha, cam, 1, 1, 1);

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