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/10.4/sys/dev/aha/aha.c 315813 2017-03-23 06:41:13Z mav $");
   62 
   63 #include <sys/param.h>
   64 #include <sys/conf.h>
   65 #include <sys/bus.h>
   66 #include <sys/systm.h>
   67 #include <sys/malloc.h>
   68 #include <sys/kernel.h>
   69 #include <sys/lock.h>
   70 #include <sys/module.h>
   71 #include <sys/mutex.h>
   72 #include <sys/rman.h>
   73 
   74 #include <machine/bus.h>
   75 
   76 #include <cam/cam.h>
   77 #include <cam/cam_ccb.h>
   78 #include <cam/cam_sim.h>
   79 #include <cam/cam_xpt_sim.h>
   80 #include <cam/cam_debug.h>
   81 
   82 #include <cam/scsi/scsi_message.h>
   83 
   84 #include <dev/aha/ahareg.h>
   85 
   86 #define PRVERB(x) do { if (bootverbose) device_printf x; } while (0)
   87 
   88 /* Macro to determine that a rev is potentially a new valid one
   89  * so that the driver doesn't keep breaking on new revs as it
   90  * did for the CF and CP.
   91  */
   92 #define PROBABLY_NEW_BOARD(REV) (REV > 0x43 && REV < 0x56)
   93 
   94 /* MailBox Management functions */
   95 static __inline void    ahanextinbox(struct aha_softc *aha);
   96 static __inline void    ahanextoutbox(struct aha_softc *aha);
   97 
   98 #define aha_name(aha)   device_get_nameunit(aha->dev)
   99 
  100 static __inline void
  101 ahanextinbox(struct aha_softc *aha)
  102 {
  103         if (aha->cur_inbox == aha->last_inbox)
  104                 aha->cur_inbox = aha->in_boxes;
  105         else
  106                 aha->cur_inbox++;
  107 }
  108 
  109 static __inline void
  110 ahanextoutbox(struct aha_softc *aha)
  111 {
  112         if (aha->cur_outbox == aha->last_outbox)
  113                 aha->cur_outbox = aha->out_boxes;
  114         else
  115                 aha->cur_outbox++;
  116 }
  117 
  118 #define ahautoa24(u,s3)                 \
  119         (s3)[0] = ((u) >> 16) & 0xff;   \
  120         (s3)[1] = ((u) >> 8) & 0xff;    \
  121         (s3)[2] = (u) & 0xff;
  122 
  123 #define aha_a24tou(s3) \
  124         (((s3)[0] << 16) | ((s3)[1] << 8) | (s3)[2])
  125 
  126 /* CCB Management functions */
  127 static __inline uint32_t                ahaccbvtop(struct aha_softc *aha,
  128                                                   struct aha_ccb *accb);
  129 static __inline struct aha_ccb*         ahaccbptov(struct aha_softc *aha,
  130                                                   uint32_t ccb_addr);
  131 
  132 static __inline uint32_t
  133 ahaccbvtop(struct aha_softc *aha, struct aha_ccb *accb)
  134 {
  135         return (aha->aha_ccb_physbase
  136               + (uint32_t)((caddr_t)accb - (caddr_t)aha->aha_ccb_array));
  137 }
  138 static __inline struct aha_ccb *
  139 ahaccbptov(struct aha_softc *aha, uint32_t ccb_addr)
  140 {
  141         return (aha->aha_ccb_array +
  142               + ((struct aha_ccb*)(uintptr_t)ccb_addr -
  143                  (struct aha_ccb*)(uintptr_t)aha->aha_ccb_physbase));
  144 }
  145 
  146 static struct aha_ccb*  ahagetccb(struct aha_softc *aha);
  147 static __inline void    ahafreeccb(struct aha_softc *aha, struct aha_ccb *accb);
  148 static void             ahaallocccbs(struct aha_softc *aha);
  149 static bus_dmamap_callback_t ahaexecuteccb;
  150 static void             ahadone(struct aha_softc *aha, struct aha_ccb *accb,
  151                                aha_mbi_comp_code_t comp_code);
  152 static void             aha_intr_locked(struct aha_softc *aha);
  153 
  154 /* Host adapter command functions */
  155 static int      ahareset(struct aha_softc* aha, int hard_reset);
  156 
  157 /* Initialization functions */
  158 static int                      ahainitmboxes(struct aha_softc *aha);
  159 static bus_dmamap_callback_t    ahamapmboxes;
  160 static bus_dmamap_callback_t    ahamapccbs;
  161 static bus_dmamap_callback_t    ahamapsgs;
  162 
  163 /* Transfer Negotiation Functions */
  164 static void ahafetchtransinfo(struct aha_softc *aha,
  165                              struct ccb_trans_settings *cts);
  166 
  167 /* CAM SIM entry points */
  168 #define ccb_accb_ptr spriv_ptr0
  169 #define ccb_aha_ptr spriv_ptr1
  170 static void     ahaaction(struct cam_sim *sim, union ccb *ccb);
  171 static void     ahapoll(struct cam_sim *sim);
  172 
  173 /* Our timeout handler */
  174 static void     ahatimeout(void *arg);
  175 
  176 /* Exported functions */
  177 void
  178 aha_alloc(struct aha_softc *aha)
  179 {
  180 
  181         SLIST_INIT(&aha->free_aha_ccbs);
  182         LIST_INIT(&aha->pending_ccbs);
  183         SLIST_INIT(&aha->sg_maps);
  184         aha->ccb_sg_opcode = INITIATOR_SG_CCB_WRESID;
  185         aha->ccb_ccb_opcode = INITIATOR_CCB_WRESID;
  186         mtx_init(&aha->lock, "aha", NULL, MTX_DEF);
  187 }
  188 
  189 void
  190 aha_free(struct aha_softc *aha)
  191 {
  192         switch (aha->init_level) {
  193         default:
  194         case 8:
  195         {
  196                 struct sg_map_node *sg_map;
  197 
  198                 while ((sg_map = SLIST_FIRST(&aha->sg_maps))!= NULL) {
  199                         SLIST_REMOVE_HEAD(&aha->sg_maps, links);
  200                         bus_dmamap_unload(aha->sg_dmat, sg_map->sg_dmamap);
  201                         bus_dmamem_free(aha->sg_dmat, sg_map->sg_vaddr,
  202                             sg_map->sg_dmamap);
  203                         free(sg_map, M_DEVBUF);
  204                 }
  205                 bus_dma_tag_destroy(aha->sg_dmat);
  206         }
  207         case 7:
  208                 bus_dmamap_unload(aha->ccb_dmat, aha->ccb_dmamap);
  209         case 6:
  210                 bus_dmamem_free(aha->ccb_dmat, aha->aha_ccb_array,
  211                     aha->ccb_dmamap);
  212                 bus_dmamap_destroy(aha->ccb_dmat, 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         mtx_destroy(&aha->lock);
  229 }
  230 
  231 /*
  232  * Probe the adapter and verify that the card is an Adaptec.
  233  */
  234 int
  235 aha_probe(struct aha_softc* aha)
  236 {
  237         u_int    status;
  238         u_int    intstat;
  239         int      error;
  240         board_id_data_t board_id;
  241 
  242         /*
  243          * See if the three I/O ports look reasonable.
  244          * Touch the minimal number of registers in the
  245          * failure case.
  246          */
  247         status = aha_inb(aha, STATUS_REG);
  248         if ((status == 0) ||
  249             (status & (DIAG_ACTIVE|CMD_REG_BUSY | STATUS_REG_RSVD)) != 0) {
  250                 PRVERB((aha->dev, "status reg test failed %x\n", status));
  251                 return (ENXIO);
  252         }
  253 
  254         intstat = aha_inb(aha, INTSTAT_REG);
  255         if ((intstat & INTSTAT_REG_RSVD) != 0) {
  256                 PRVERB((aha->dev, "Failed Intstat Reg Test\n"));
  257                 return (ENXIO);
  258         }
  259 
  260         /*
  261          * Looking good so far.  Final test is to reset the
  262          * adapter and fetch the board ID and ensure we aren't
  263          * looking at a BusLogic.
  264          */
  265         if ((error = ahareset(aha, /*hard_reset*/TRUE)) != 0) {
  266                 PRVERB((aha->dev, "Failed Reset\n"));
  267                 return (ENXIO);
  268         }
  269 
  270         /*
  271          * Get the board ID.  We use this to see if we're dealing with
  272          * a buslogic card or an aha card (or clone).
  273          */
  274         error = aha_cmd(aha, AOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
  275             (uint8_t*)&board_id, sizeof(board_id), DEFAULT_CMD_TIMEOUT);
  276         if (error != 0) {
  277                 PRVERB((aha->dev, "INQUIRE failed %x\n", error));
  278                 return (ENXIO);
  279         }
  280         aha->fw_major = board_id.firmware_rev_major;
  281         aha->fw_minor = board_id.firmware_rev_minor;
  282         aha->boardid = board_id.board_type;
  283 
  284         /*
  285          * The Buslogic cards have an id of either 0x41 or 0x42.  So
  286          * if those come up in the probe, we test the geometry register
  287          * of the board.  Adaptec boards that are this old will not have
  288          * this register, and return 0xff, while buslogic cards will return
  289          * something different.
  290          *
  291          * It appears that for reasons unknow, for the for the
  292          * aha-1542B cards, we need to wait a little bit before trying
  293          * to read the geometry register.  I picked 10ms since we have
  294          * reports that a for loop to 1000 did the trick, and this
  295          * errs on the side of conservatism.  Besides, no one will
  296          * notice a 10mS delay here, even the 1542B card users :-)
  297          *
  298          * Some compatible cards return 0 here.  Some cards also
  299          * seem to return 0x7f.
  300          *
  301          * XXX I'm not sure how this will impact other cloned cards
  302          *
  303          * This really should be replaced with the esetup command, since
  304          * that appears to be more reliable.  This becomes more and more
  305          * true over time as we discover more cards that don't read the
  306          * geometry register consistantly.
  307          */
  308         if (aha->boardid <= 0x42) {
  309                 /* Wait 10ms before reading */
  310                 DELAY(10000);
  311                 status = aha_inb(aha, GEOMETRY_REG);
  312                 if (status != 0xff && status != 0x00 && status != 0x7f) {
  313                         PRVERB((aha->dev, "Geometry Register test failed %#x\n",
  314                                 status));
  315                         return (ENXIO);
  316                 }
  317         }
  318 
  319         return (0);
  320 }
  321 
  322 /*
  323  * Pull the boards setup information and record it in our softc.
  324  */
  325 int
  326 aha_fetch_adapter_info(struct aha_softc *aha)
  327 {
  328         setup_data_t    setup_info;
  329         config_data_t config_data;
  330         uint8_t length_param;
  331         int      error;
  332         struct  aha_extbios extbios;
  333 
  334         switch (aha->boardid) {
  335         case BOARD_1540_16HEAD_BIOS:
  336                 snprintf(aha->model, sizeof(aha->model), "1540 16 head BIOS");
  337                 break;
  338         case BOARD_1540_64HEAD_BIOS:
  339                 snprintf(aha->model, sizeof(aha->model), "1540 64 head BIOS");
  340                 break;
  341         case BOARD_1542:
  342                 snprintf(aha->model, sizeof(aha->model), "1540/1542 64 head BIOS");
  343                 break;
  344         case BOARD_1640:
  345                 snprintf(aha->model, sizeof(aha->model), "1640");
  346                 break;
  347         case BOARD_1740:
  348                 snprintf(aha->model, sizeof(aha->model), "1740A/1742A/1744");
  349                 break;
  350         case BOARD_1542C:
  351                 snprintf(aha->model, sizeof(aha->model), "1542C");
  352                 break;
  353         case BOARD_1542CF:
  354                 snprintf(aha->model, sizeof(aha->model), "1542CF");
  355                 break;
  356         case BOARD_1542CP:
  357                 snprintf(aha->model, sizeof(aha->model), "1542CP");
  358                 break;
  359         default:
  360                 snprintf(aha->model, sizeof(aha->model), "Unknown");
  361                 break;
  362         }
  363         /*
  364          * If we are a new type of 1542 board (anything newer than a 1542C)
  365          * then disable the extended bios so that the
  366          * mailbox interface is unlocked.
  367          * This is also true for the 1542B Version 3.20. First Adaptec
  368          * board that supports >1Gb drives.
  369          * No need to check the extended bios flags as some of the
  370          * extensions that cause us problems are not flagged in that byte.
  371          */
  372         if (PROBABLY_NEW_BOARD(aha->boardid) ||
  373                 (aha->boardid == 0x41
  374                 && aha->fw_major == 0x31 &&
  375                 aha->fw_minor >= 0x34)) {
  376                 error = aha_cmd(aha, AOP_RETURN_EXT_BIOS_INFO, NULL,
  377                     /*paramlen*/0, (u_char *)&extbios, sizeof(extbios),
  378                     DEFAULT_CMD_TIMEOUT);
  379                 if (error != 0) {
  380                         device_printf(aha->dev,
  381                             "AOP_RETURN_EXT_BIOS_INFO - Failed.");
  382                         return (error);
  383                 }
  384                 error = aha_cmd(aha, AOP_MBOX_IF_ENABLE, (uint8_t *)&extbios,
  385                     /*paramlen*/2, NULL, 0, DEFAULT_CMD_TIMEOUT);
  386                 if (error != 0) {
  387                         device_printf(aha->dev, "AOP_MBOX_IF_ENABLE - Failed.");
  388                         return (error);
  389                 }
  390         }
  391         if (aha->boardid < 0x41)
  392                 device_printf(aha->dev, "Warning: aha-1542A won't work.\n");
  393 
  394         aha->max_sg = 17;               /* Need >= 17 to do 64k I/O */
  395         aha->diff_bus = 0;
  396         aha->extended_lun = 0;
  397         aha->extended_trans = 0;
  398         aha->max_ccbs = 16;
  399         /* Determine Sync/Wide/Disc settings */
  400         length_param = sizeof(setup_info);
  401         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &length_param,
  402             /*paramlen*/1, (uint8_t*)&setup_info, sizeof(setup_info),
  403             DEFAULT_CMD_TIMEOUT);
  404         if (error != 0) {
  405                 device_printf(aha->dev, "aha_fetch_adapter_info - Failed "
  406                     "Get Setup Info\n");
  407                 return (error);
  408         }
  409         if (setup_info.initiate_sync != 0) {
  410                 aha->sync_permitted = ALL_TARGETS;
  411         }
  412         aha->disc_permitted = ALL_TARGETS;
  413 
  414         /* We need as many mailboxes as we can have ccbs */
  415         aha->num_boxes = aha->max_ccbs;
  416 
  417         /* Determine our SCSI ID */
  418         error = aha_cmd(aha, AOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  419             (uint8_t*)&config_data, sizeof(config_data), DEFAULT_CMD_TIMEOUT);
  420         if (error != 0) {
  421                 device_printf(aha->dev,
  422                     "aha_fetch_adapter_info - Failed Get Config\n");
  423                 return (error);
  424         }
  425         aha->scsi_id = config_data.scsi_id;
  426         return (0);
  427 }
  428 
  429 /*
  430  * Start the board, ready for normal operation
  431  */
  432 int
  433 aha_init(struct aha_softc* aha)
  434 {
  435         /* Announce the Adapter */
  436         device_printf(aha->dev, "AHA-%s FW Rev. %c.%c (ID=%x) ",
  437             aha->model, aha->fw_major, aha->fw_minor, aha->boardid);
  438 
  439         if (aha->diff_bus != 0)
  440                 printf("Diff ");
  441 
  442         printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", aha->scsi_id,
  443             aha->max_ccbs);
  444 
  445         /*
  446          * Create our DMA tags.  These tags define the kinds of device
  447          * accessible memory allocations and memory mappings we will
  448          * need to perform during normal operation.
  449          *
  450          * Unless we need to further restrict the allocation, we rely
  451          * on the restrictions of the parent dmat, hence the common
  452          * use of MAXADDR and MAXSIZE.
  453          */
  454 
  455         /* DMA tag for mapping buffers into device visible space. */
  456         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  457                                 /* alignment    */ 1,
  458                                 /* boundary     */ 0,
  459                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  460                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  461                                 /* filter       */ NULL,
  462                                 /* filterarg    */ NULL,
  463                                 /* maxsize      */ DFLTPHYS,
  464                                 /* nsegments    */ AHA_NSEG,
  465                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  466                                 /* flags        */ BUS_DMA_ALLOCNOW,
  467                                 /* lockfunc     */ busdma_lock_mutex,
  468                                 /* lockarg      */ &aha->lock,
  469                                 &aha->buffer_dmat) != 0) {
  470                 goto error_exit;
  471         }
  472 
  473         aha->init_level++;
  474         /* DMA tag for our mailboxes */
  475         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  476                                 /* alignment    */ 1,
  477                                 /* boundary     */ 0,
  478                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  479                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  480                                 /* filter       */ NULL,
  481                                 /* filterarg    */ NULL,
  482                                 /* maxsize      */ aha->num_boxes *
  483                                                    (sizeof(aha_mbox_in_t) +
  484                                                     sizeof(aha_mbox_out_t)),
  485                                 /* nsegments    */ 1,
  486                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  487                                 /* flags        */ 0,
  488                                 /* lockfunc     */ NULL,
  489                                 /* lockarg      */ NULL,
  490                                 &aha->mailbox_dmat) != 0) {
  491                 goto error_exit;
  492         }
  493 
  494         aha->init_level++;
  495 
  496         /* Allocation for our mailboxes */
  497         if (bus_dmamem_alloc(aha->mailbox_dmat, (void **)&aha->out_boxes,
  498             BUS_DMA_NOWAIT, &aha->mailbox_dmamap) != 0)
  499                 goto error_exit;
  500 
  501         aha->init_level++;
  502 
  503         /* And permanently map them */
  504         bus_dmamap_load(aha->mailbox_dmat, aha->mailbox_dmamap,
  505             aha->out_boxes, aha->num_boxes * (sizeof(aha_mbox_in_t) +
  506             sizeof(aha_mbox_out_t)), ahamapmboxes, aha, /*flags*/0);
  507 
  508         aha->init_level++;
  509 
  510         aha->in_boxes = (aha_mbox_in_t *)&aha->out_boxes[aha->num_boxes];
  511 
  512         ahainitmboxes(aha);
  513 
  514         /* DMA tag for our ccb structures */
  515         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  516                                 /* alignment    */ 1,
  517                                 /* boundary     */ 0,
  518                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  519                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  520                                 /* filter       */ NULL,
  521                                 /* filterarg    */ NULL,
  522                                 /* maxsize      */ aha->max_ccbs *
  523                                                    sizeof(struct aha_ccb),
  524                                 /* nsegments    */ 1,
  525                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  526                                 /* flags        */ 0,
  527                                 /* lockfunc     */ NULL,
  528                                 /* lockarg      */ NULL,
  529                                 &aha->ccb_dmat) != 0) {
  530                 goto error_exit;
  531         }
  532 
  533         aha->init_level++;
  534 
  535         /* Allocation for our ccbs */
  536         if (bus_dmamem_alloc(aha->ccb_dmat, (void **)&aha->aha_ccb_array,
  537             BUS_DMA_NOWAIT, &aha->ccb_dmamap) != 0)
  538                 goto error_exit;
  539 
  540         aha->init_level++;
  541 
  542         /* And permanently map them */
  543         bus_dmamap_load(aha->ccb_dmat, aha->ccb_dmamap, aha->aha_ccb_array,
  544             aha->max_ccbs * sizeof(struct aha_ccb), ahamapccbs, aha, /*flags*/0);
  545 
  546         aha->init_level++;
  547 
  548         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
  549         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  550                                 /* alignment    */ 1,
  551                                 /* boundary     */ 0,
  552                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  553                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  554                                 /* filter       */ NULL,
  555                                 /* filterarg    */ NULL,
  556                                 /* maxsize      */ PAGE_SIZE,
  557                                 /* nsegments    */ 1,
  558                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  559                                 /* flags        */ 0,
  560                                 /* lockfunc     */ NULL,
  561                                 /* lockarg      */ NULL,
  562                                 &aha->sg_dmat) != 0)
  563                 goto error_exit;
  564 
  565         aha->init_level++;
  566 
  567         /* Perform initial CCB allocation */
  568         bzero(aha->aha_ccb_array, aha->max_ccbs * sizeof(struct aha_ccb));
  569         ahaallocccbs(aha);
  570 
  571         if (aha->num_ccbs == 0) {
  572                 device_printf(aha->dev,
  573                     "aha_init - Unable to allocate initial ccbs\n");
  574                 goto error_exit;
  575         }
  576 
  577         /*
  578          * Note that we are going and return (to probe)
  579          */
  580         return (0);
  581 
  582 error_exit:
  583 
  584         return (ENXIO);
  585 }
  586 
  587 int
  588 aha_attach(struct aha_softc *aha)
  589 {
  590         int tagged_dev_openings;
  591         struct cam_devq *devq;
  592 
  593         /*
  594          * We don't do tagged queueing, since the aha cards don't
  595          * support it.
  596          */
  597         tagged_dev_openings = 0;
  598 
  599         /*
  600          * Create the device queue for our SIM.
  601          */
  602         devq = cam_simq_alloc(aha->max_ccbs - 1);
  603         if (devq == NULL)
  604                 return (ENOMEM);
  605 
  606         /*
  607          * Construct our SIM entry
  608          */
  609         aha->sim = cam_sim_alloc(ahaaction, ahapoll, "aha", aha,
  610             device_get_unit(aha->dev), &aha->lock, 2, tagged_dev_openings,
  611             devq);
  612         if (aha->sim == NULL) {
  613                 cam_simq_free(devq);
  614                 return (ENOMEM);
  615         }
  616         mtx_lock(&aha->lock);
  617         if (xpt_bus_register(aha->sim, aha->dev, 0) != CAM_SUCCESS) {
  618                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
  619                 mtx_unlock(&aha->lock);
  620                 return (ENXIO);
  621         }
  622         if (xpt_create_path(&aha->path, /*periph*/NULL, cam_sim_path(aha->sim),
  623             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  624                 xpt_bus_deregister(cam_sim_path(aha->sim));
  625                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
  626                 mtx_unlock(&aha->lock);
  627                 return (ENXIO);
  628         }
  629         mtx_unlock(&aha->lock);
  630 
  631         return (0);
  632 }
  633 
  634 static void
  635 ahaallocccbs(struct aha_softc *aha)
  636 {
  637         struct aha_ccb *next_ccb;
  638         struct sg_map_node *sg_map;
  639         bus_addr_t physaddr;
  640         aha_sg_t *segs;
  641         int newcount;
  642         int i;
  643 
  644         next_ccb = &aha->aha_ccb_array[aha->num_ccbs];
  645 
  646         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
  647 
  648         if (sg_map == NULL)
  649                 return;
  650 
  651         /* Allocate S/G space for the next batch of CCBS */
  652         if (bus_dmamem_alloc(aha->sg_dmat, (void **)&sg_map->sg_vaddr,
  653             BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
  654                 free(sg_map, M_DEVBUF);
  655                 return;
  656         }
  657 
  658         SLIST_INSERT_HEAD(&aha->sg_maps, sg_map, links);
  659 
  660         bus_dmamap_load(aha->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
  661             PAGE_SIZE, ahamapsgs, aha, /*flags*/0);
  662 
  663         segs = sg_map->sg_vaddr;
  664         physaddr = sg_map->sg_physaddr;
  665 
  666         newcount = (PAGE_SIZE / (AHA_NSEG * sizeof(aha_sg_t)));
  667         for (i = 0; aha->num_ccbs < aha->max_ccbs && i < newcount; i++) {
  668                 int error;
  669 
  670                 next_ccb->sg_list = segs;
  671                 next_ccb->sg_list_phys = physaddr;
  672                 next_ccb->flags = ACCB_FREE;
  673                 callout_init_mtx(&next_ccb->timer, &aha->lock, 0);
  674                 error = bus_dmamap_create(aha->buffer_dmat, /*flags*/0,
  675                     &next_ccb->dmamap);
  676                 if (error != 0)
  677                         break;
  678                 SLIST_INSERT_HEAD(&aha->free_aha_ccbs, next_ccb, links);
  679                 segs += AHA_NSEG;
  680                 physaddr += (AHA_NSEG * sizeof(aha_sg_t));
  681                 next_ccb++;
  682                 aha->num_ccbs++;
  683         }
  684 
  685         /* Reserve a CCB for error recovery */
  686         if (aha->recovery_accb == NULL) {
  687                 aha->recovery_accb = SLIST_FIRST(&aha->free_aha_ccbs);
  688                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  689         }
  690 }
  691 
  692 static __inline void
  693 ahafreeccb(struct aha_softc *aha, struct aha_ccb *accb)
  694 {
  695 
  696         if (!dumping)
  697                 mtx_assert(&aha->lock, MA_OWNED);
  698         if ((accb->flags & ACCB_ACTIVE) != 0)
  699                 LIST_REMOVE(&accb->ccb->ccb_h, sim_links.le);
  700         if (aha->resource_shortage != 0
  701             && (accb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
  702                 accb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  703                 aha->resource_shortage = FALSE;
  704         }
  705         accb->flags = ACCB_FREE;
  706         SLIST_INSERT_HEAD(&aha->free_aha_ccbs, accb, links);
  707         aha->active_ccbs--;
  708 }
  709 
  710 static struct aha_ccb*
  711 ahagetccb(struct aha_softc *aha)
  712 {
  713         struct  aha_ccb* accb;
  714 
  715         if (!dumping)
  716                 mtx_assert(&aha->lock, MA_OWNED);
  717         if ((accb = SLIST_FIRST(&aha->free_aha_ccbs)) != NULL) {
  718                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  719                 aha->active_ccbs++;
  720         } else if (aha->num_ccbs < aha->max_ccbs) {
  721                 ahaallocccbs(aha);
  722                 accb = SLIST_FIRST(&aha->free_aha_ccbs);
  723                 if (accb == NULL)
  724                         device_printf(aha->dev, "Can't malloc ACCB\n");
  725                 else {
  726                         SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  727                         aha->active_ccbs++;
  728                 }
  729         }
  730 
  731         return (accb);
  732 }
  733 
  734 static void
  735 ahaaction(struct cam_sim *sim, union ccb *ccb)
  736 {
  737         struct  aha_softc *aha;
  738 
  739         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahaaction\n"));
  740 
  741         aha = (struct aha_softc *)cam_sim_softc(sim);
  742         mtx_assert(&aha->lock, MA_OWNED);
  743 
  744         switch (ccb->ccb_h.func_code) {
  745         /* Common cases first */
  746         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
  747         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */        {
  748                 struct  aha_ccb *accb;
  749                 struct  aha_hccb *hccb;
  750 
  751                 /*
  752                  * Get an accb to use.
  753                  */
  754                 if ((accb = ahagetccb(aha)) == NULL) {
  755                         aha->resource_shortage = TRUE;
  756                         xpt_freeze_simq(aha->sim, /*count*/1);
  757                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
  758                         xpt_done(ccb);
  759                         return;
  760                 }
  761                 hccb = &accb->hccb;
  762 
  763                 /*
  764                  * So we can find the ACCB when an abort is requested
  765                  */
  766                 accb->ccb = ccb;
  767                 ccb->ccb_h.ccb_accb_ptr = accb;
  768                 ccb->ccb_h.ccb_aha_ptr = aha;
  769 
  770                 /*
  771                  * Put all the arguments for the xfer in the accb
  772                  */
  773                 hccb->target = ccb->ccb_h.target_id;
  774                 hccb->lun = ccb->ccb_h.target_lun;
  775                 hccb->ahastat = 0;
  776                 hccb->sdstat = 0;
  777 
  778                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
  779                         struct ccb_scsiio *csio;
  780                         struct ccb_hdr *ccbh;
  781                         int error;
  782 
  783                         csio = &ccb->csio;
  784                         ccbh = &csio->ccb_h;
  785                         hccb->opcode = aha->ccb_ccb_opcode;
  786                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) != 0;
  787                         hccb->dataout = (ccb->ccb_h.flags & CAM_DIR_OUT) != 0;
  788                         hccb->cmd_len = csio->cdb_len;
  789                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
  790                                 ccb->ccb_h.status = CAM_REQ_INVALID;
  791                                 ahafreeccb(aha, accb);
  792                                 xpt_done(ccb);
  793                                 return;
  794                         }
  795                         hccb->sense_len = csio->sense_len;
  796                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
  797                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
  798                                         bcopy(csio->cdb_io.cdb_ptr,
  799                                               hccb->scsi_cdb, hccb->cmd_len);
  800                                 } else {
  801                                         /* I guess I could map it in... */
  802                                         ccbh->status = CAM_REQ_INVALID;
  803                                         ahafreeccb(aha, accb);
  804                                         xpt_done(ccb);
  805                                         return;
  806                                 }
  807                         } else {
  808                                 bcopy(csio->cdb_io.cdb_bytes,
  809                                       hccb->scsi_cdb, hccb->cmd_len);
  810                         }
  811                         /*
  812                          * If we have any data to send with this command,
  813                          * map it into bus space.
  814                          */
  815 
  816                         error = bus_dmamap_load_ccb(
  817                             aha->buffer_dmat,
  818                             accb->dmamap,
  819                             ccb,
  820                             ahaexecuteccb,
  821                             accb,
  822                             /*flags*/0);
  823                         if (error == EINPROGRESS) {
  824                                 /*
  825                                  * So as to maintain ordering, freeze the
  826                                  * controller queue until our mapping is
  827                                  * returned.
  828                                  */
  829                                 xpt_freeze_simq(aha->sim, 1);
  830                                 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
  831                         }
  832                 } else {
  833                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
  834                         /* No data transfer */
  835                         hccb->datain = TRUE;
  836                         hccb->dataout = TRUE;
  837                         hccb->cmd_len = 0;
  838                         hccb->sense_len = 0;
  839                         ahaexecuteccb(accb, NULL, 0, 0);
  840                 }
  841                 break;
  842         }
  843         case XPT_EN_LUN:                /* Enable LUN as a target */
  844         case XPT_TARGET_IO:             /* Execute target I/O request */
  845         case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
  846         case XPT_CONT_TARGET_IO:        /* Continue Host Target I/O Connection*/
  847         case XPT_ABORT:                 /* Abort the specified CCB */
  848                 /* XXX Implement */
  849                 ccb->ccb_h.status = CAM_REQ_INVALID;
  850                 xpt_done(ccb);
  851                 break;
  852         case XPT_SET_TRAN_SETTINGS:
  853                 /* XXX Implement */
  854                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
  855                 xpt_done(ccb);
  856                 break;
  857         case XPT_GET_TRAN_SETTINGS:
  858         /* Get default/user set transfer settings for the target */
  859         {
  860                 struct  ccb_trans_settings *cts = &ccb->cts;
  861                 u_int   target_mask = 0x01 << ccb->ccb_h.target_id;
  862                 struct ccb_trans_settings_scsi *scsi =
  863                     &cts->proto_specific.scsi;
  864                 struct ccb_trans_settings_spi *spi =
  865                     &cts->xport_specific.spi;
  866 
  867                 cts->protocol = PROTO_SCSI;
  868                 cts->protocol_version = SCSI_REV_2;
  869                 cts->transport = XPORT_SPI;
  870                 cts->transport_version = 2;
  871                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
  872                         spi->flags = 0;
  873                         if ((aha->disc_permitted & target_mask) != 0)
  874                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
  875                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
  876                         if ((aha->sync_permitted & target_mask) != 0) {
  877                                 if (aha->boardid >= BOARD_1542CF)
  878                                         spi->sync_period = 25;
  879                                 else
  880                                         spi->sync_period = 50;
  881                         } else {
  882                                 spi->sync_period = 0;
  883                         }
  884 
  885                         if (spi->sync_period != 0)
  886                                 spi->sync_offset = 15;
  887 
  888                         spi->valid = CTS_SPI_VALID_SYNC_RATE
  889                                    | CTS_SPI_VALID_SYNC_OFFSET
  890                                    | CTS_SPI_VALID_BUS_WIDTH
  891                                    | CTS_SPI_VALID_DISC;
  892                         scsi->valid = CTS_SCSI_VALID_TQ;
  893                 } else {
  894                         ahafetchtransinfo(aha, cts);
  895                 }
  896 
  897                 ccb->ccb_h.status = CAM_REQ_CMP;
  898                 xpt_done(ccb);
  899                 break;
  900         }
  901         case XPT_CALC_GEOMETRY:
  902         {
  903                 struct    ccb_calc_geometry *ccg;
  904                 uint32_t size_mb;
  905                 uint32_t secs_per_cylinder;
  906 
  907                 ccg = &ccb->ccg;
  908                 size_mb = ccg->volume_size
  909                         / ((1024L * 1024L) / ccg->block_size);
  910                 if (size_mb >= 1024 && (aha->extended_trans != 0)) {
  911                         if (size_mb >= 2048) {
  912                                 ccg->heads = 255;
  913                                 ccg->secs_per_track = 63;
  914                         } else {
  915                                 ccg->heads = 128;
  916                                 ccg->secs_per_track = 32;
  917                         }
  918                 } else {
  919                         ccg->heads = 64;
  920                         ccg->secs_per_track = 32;
  921                 }
  922                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
  923                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
  924                 ccb->ccb_h.status = CAM_REQ_CMP;
  925                 xpt_done(ccb);
  926                 break;
  927         }
  928         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
  929                 ahareset(aha, /*hardreset*/TRUE);
  930                 ccb->ccb_h.status = CAM_REQ_CMP;
  931                 xpt_done(ccb);
  932                 break;
  933         case XPT_TERM_IO:               /* Terminate the I/O process */
  934                 /* XXX Implement */
  935                 ccb->ccb_h.status = CAM_REQ_INVALID;
  936                 xpt_done(ccb);
  937                 break;
  938         case XPT_PATH_INQ:              /* Path routing inquiry */
  939         {
  940                 struct ccb_pathinq *cpi = &ccb->cpi;
  941 
  942                 cpi->version_num = 1; /* XXX??? */
  943                 cpi->hba_inquiry = PI_SDTR_ABLE;
  944                 cpi->target_sprt = 0;
  945                 cpi->hba_misc = 0;
  946                 cpi->hba_eng_cnt = 0;
  947                 cpi->max_target = 7;
  948                 cpi->max_lun = 7;
  949                 cpi->initiator_id = aha->scsi_id;
  950                 cpi->bus_id = cam_sim_bus(sim);
  951                 cpi->base_transfer_speed = 3300;
  952                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  953                 strlcpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
  954                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
  955                 cpi->unit_number = cam_sim_unit(sim);
  956                 cpi->transport = XPORT_SPI;
  957                 cpi->transport_version = 2;
  958                 cpi->protocol = PROTO_SCSI;
  959                 cpi->protocol_version = SCSI_REV_2;
  960                 cpi->ccb_h.status = CAM_REQ_CMP;
  961                 xpt_done(ccb);
  962                 break;
  963         }
  964         default:
  965                 ccb->ccb_h.status = CAM_REQ_INVALID;
  966                 xpt_done(ccb);
  967                 break;
  968         }
  969 }
  970 
  971 static void
  972 ahaexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
  973 {
  974         struct   aha_ccb *accb;
  975         union    ccb *ccb;
  976         struct   aha_softc *aha;
  977         uint32_t paddr;
  978 
  979         accb = (struct aha_ccb *)arg;
  980         ccb = accb->ccb;
  981         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
  982 
  983         if (error != 0) {
  984                 if (error != EFBIG)
  985                         device_printf(aha->dev,
  986                             "Unexepected error 0x%x returned from "
  987                             "bus_dmamap_load\n", error);
  988                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
  989                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
  990                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
  991                 }
  992                 ahafreeccb(aha, accb);
  993                 xpt_done(ccb);
  994                 return;
  995         }
  996 
  997         if (nseg != 0) {
  998                 aha_sg_t *sg;
  999                 bus_dma_segment_t *end_seg;
 1000                 bus_dmasync_op_t op;
 1001 
 1002                 end_seg = dm_segs + nseg;
 1003 
 1004                 /* Copy the segments into our SG list */
 1005                 sg = accb->sg_list;
 1006                 while (dm_segs < end_seg) {
 1007                         ahautoa24(dm_segs->ds_len, sg->len);
 1008                         ahautoa24(dm_segs->ds_addr, sg->addr);
 1009                         sg++;
 1010                         dm_segs++;
 1011                 }
 1012 
 1013                 if (nseg > 1) {
 1014                         accb->hccb.opcode = aha->ccb_sg_opcode;
 1015                         ahautoa24((sizeof(aha_sg_t) * nseg),
 1016                             accb->hccb.data_len);
 1017                         ahautoa24(accb->sg_list_phys, accb->hccb.data_addr);
 1018                 } else {
 1019                         bcopy(accb->sg_list->len, accb->hccb.data_len, 3);
 1020                         bcopy(accb->sg_list->addr, accb->hccb.data_addr, 3);
 1021                 }
 1022 
 1023                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1024                         op = BUS_DMASYNC_PREREAD;
 1025                 else
 1026                         op = BUS_DMASYNC_PREWRITE;
 1027 
 1028                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
 1029 
 1030         } else {
 1031                 accb->hccb.opcode = INITIATOR_CCB;
 1032                 ahautoa24(0, accb->hccb.data_len);
 1033                 ahautoa24(0, accb->hccb.data_addr);
 1034         }
 1035 
 1036         /*
 1037          * Last time we need to check if this CCB needs to
 1038          * be aborted.
 1039          */
 1040         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 1041                 if (nseg != 0)
 1042                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1043                 ahafreeccb(aha, accb);
 1044                 xpt_done(ccb);
 1045                 return;
 1046         }
 1047 
 1048         accb->flags = ACCB_ACTIVE;
 1049         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1050         LIST_INSERT_HEAD(&aha->pending_ccbs, &ccb->ccb_h, sim_links.le);
 1051 
 1052         callout_reset_sbt(&accb->timer, SBT_1MS * ccb->ccb_h.timeout, 0,
 1053             ahatimeout, accb, 0);
 1054 
 1055         /* Tell the adapter about this command */
 1056         if (aha->cur_outbox->action_code != AMBO_FREE) {
 1057                 /*
 1058                  * We should never encounter a busy mailbox.
 1059                  * If we do, warn the user, and treat it as
 1060                  * a resource shortage.  If the controller is
 1061                  * hung, one of the pending transactions will
 1062                  * timeout causing us to start recovery operations.
 1063                  */
 1064                 device_printf(aha->dev,
 1065                     "Encountered busy mailbox with %d out of %d "
 1066                     "commands active!!!", aha->active_ccbs, aha->max_ccbs);
 1067                 callout_stop(&accb->timer);
 1068                 if (nseg != 0)
 1069                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1070                 ahafreeccb(aha, accb);
 1071                 aha->resource_shortage = TRUE;
 1072                 xpt_freeze_simq(aha->sim, /*count*/1);
 1073                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1074                 xpt_done(ccb);
 1075                 return;
 1076         }
 1077         paddr = ahaccbvtop(aha, accb);
 1078         ahautoa24(paddr, aha->cur_outbox->ccb_addr);
 1079         aha->cur_outbox->action_code = AMBO_START;
 1080         aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
 1081 
 1082         ahanextoutbox(aha);
 1083 }
 1084 
 1085 void
 1086 aha_intr(void *arg)
 1087 {
 1088         struct  aha_softc *aha;
 1089 
 1090         aha = arg;
 1091         mtx_lock(&aha->lock);
 1092         aha_intr_locked(aha);
 1093         mtx_unlock(&aha->lock);
 1094 }
 1095 
 1096 void
 1097 aha_intr_locked(struct aha_softc *aha)
 1098 {
 1099         u_int   intstat;
 1100         uint32_t paddr;
 1101 
 1102         while (((intstat = aha_inb(aha, INTSTAT_REG)) & INTR_PENDING) != 0) {
 1103                 if ((intstat & CMD_COMPLETE) != 0) {
 1104                         aha->latched_status = aha_inb(aha, STATUS_REG);
 1105                         aha->command_cmp = TRUE;
 1106                 }
 1107 
 1108                 aha_outb(aha, CONTROL_REG, RESET_INTR);
 1109 
 1110                 if ((intstat & IMB_LOADED) != 0) {
 1111                         while (aha->cur_inbox->comp_code != AMBI_FREE) {
 1112                                 paddr = aha_a24tou(aha->cur_inbox->ccb_addr);
 1113                                 ahadone(aha, ahaccbptov(aha, paddr),
 1114                                     aha->cur_inbox->comp_code);
 1115                                 aha->cur_inbox->comp_code = AMBI_FREE;
 1116                                 ahanextinbox(aha);
 1117                         }
 1118                 }
 1119 
 1120                 if ((intstat & SCSI_BUS_RESET) != 0) {
 1121                         ahareset(aha, /*hardreset*/FALSE);
 1122                 }
 1123         }
 1124 }
 1125 
 1126 static void
 1127 ahadone(struct aha_softc *aha, struct aha_ccb *accb, aha_mbi_comp_code_t comp_code)
 1128 {
 1129         union  ccb        *ccb;
 1130         struct ccb_scsiio *csio;
 1131 
 1132         ccb = accb->ccb;
 1133         csio = &accb->ccb->csio;
 1134 
 1135         if ((accb->flags & ACCB_ACTIVE) == 0) {
 1136                 device_printf(aha->dev, 
 1137                     "ahadone - Attempt to free non-active ACCB %p\n",
 1138                     (void *)accb);
 1139                 return;
 1140         }
 1141 
 1142         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1143                 bus_dmasync_op_t op;
 1144 
 1145                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1146                         op = BUS_DMASYNC_POSTREAD;
 1147                 else
 1148                         op = BUS_DMASYNC_POSTWRITE;
 1149                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
 1150                 bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1151         }
 1152 
 1153         if (accb == aha->recovery_accb) {
 1154                 /*
 1155                  * The recovery ACCB does not have a CCB associated
 1156                  * with it, so short circuit the normal error handling.
 1157                  * We now traverse our list of pending CCBs and process
 1158                  * any that were terminated by the recovery CCBs action.
 1159                  * We also reinstate timeouts for all remaining, pending,
 1160                  * CCBs.
 1161                  */
 1162                 struct cam_path *path;
 1163                 struct ccb_hdr *ccb_h;
 1164                 cam_status error;
 1165 
 1166                 /* Notify all clients that a BDR occured */
 1167                 error = xpt_create_path(&path, /*periph*/NULL,
 1168                     cam_sim_path(aha->sim), accb->hccb.target,
 1169                     CAM_LUN_WILDCARD);
 1170 
 1171                 if (error == CAM_REQ_CMP) {
 1172                         xpt_async(AC_SENT_BDR, path, NULL);
 1173                         xpt_free_path(path);
 1174                 }
 1175 
 1176                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
 1177                 while (ccb_h != NULL) {
 1178                         struct aha_ccb *pending_accb;
 1179 
 1180                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1181                         if (pending_accb->hccb.target == accb->hccb.target) {
 1182                                 pending_accb->hccb.ahastat = AHASTAT_HA_BDR;
 1183                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1184                                 ahadone(aha, pending_accb, AMBI_ERROR);
 1185                         } else {
 1186                                 callout_reset_sbt(&pending_accb->timer,
 1187                                     SBT_1MS * ccb_h->timeout, 0, ahatimeout,
 1188                                     pending_accb, 0);
 1189                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1190                         }
 1191                 }
 1192                 device_printf(aha->dev, "No longer in timeout\n");
 1193                 return;
 1194         }
 1195 
 1196         callout_stop(&accb->timer);
 1197 
 1198         switch (comp_code) {
 1199         case AMBI_FREE:
 1200                 device_printf(aha->dev,
 1201                     "ahadone - CCB completed with free status!\n");
 1202                 break;
 1203         case AMBI_NOT_FOUND:
 1204                 device_printf(aha->dev,
 1205                     "ahadone - CCB Abort failed to find CCB\n");
 1206                 break;
 1207         case AMBI_ABORT:
 1208         case AMBI_ERROR:
 1209                 /* An error occured */
 1210                 if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
 1211                         csio->resid = 0;
 1212                 else
 1213                         csio->resid = aha_a24tou(accb->hccb.data_len);
 1214                 switch(accb->hccb.ahastat) {
 1215                 case AHASTAT_DATARUN_ERROR:
 1216                 {
 1217                         if (csio->resid <= 0) {
 1218                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
 1219                                 break;
 1220                         }
 1221                         /* FALLTHROUGH */
 1222                 }
 1223                 case AHASTAT_NOERROR:
 1224                         csio->scsi_status = accb->hccb.sdstat;
 1225                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 1226                         switch(csio->scsi_status) {
 1227                         case SCSI_STATUS_CHECK_COND:
 1228                         case SCSI_STATUS_CMD_TERMINATED:
 1229                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 1230                                 /*
 1231                                  * The aha writes the sense data at different
 1232                                  * offsets based on the scsi cmd len
 1233                                  */
 1234                                 bcopy((caddr_t) &accb->hccb.scsi_cdb +
 1235                                     accb->hccb.cmd_len,
 1236                                     (caddr_t) &csio->sense_data,
 1237                                     accb->hccb.sense_len);
 1238                                 break;
 1239                         default:
 1240                                 break;
 1241                         case SCSI_STATUS_OK:
 1242                                 csio->ccb_h.status = CAM_REQ_CMP;
 1243                                 break;
 1244                         }
 1245                         break;
 1246                 case AHASTAT_SELTIMEOUT:
 1247                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
 1248                         break;
 1249                 case AHASTAT_UNEXPECTED_BUSFREE:
 1250                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
 1251                         break;
 1252                 case AHASTAT_INVALID_PHASE:
 1253                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
 1254                         break;
 1255                 case AHASTAT_INVALID_ACTION_CODE:
 1256                         panic("%s: Inavlid Action code", aha_name(aha));
 1257                         break;
 1258                 case AHASTAT_INVALID_OPCODE:
 1259                         if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
 1260                                 panic("%s: Invalid CCB Opcode %x hccb = %p",
 1261                                     aha_name(aha), accb->hccb.opcode,
 1262                                     &accb->hccb);
 1263                         device_printf(aha->dev,
 1264                             "AHA-1540A compensation failed\n");
 1265                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1266                         csio->ccb_h.status = CAM_REQUEUE_REQ;
 1267                         break;
 1268                 case AHASTAT_LINKED_CCB_LUN_MISMATCH:
 1269                         /* We don't even support linked commands... */
 1270                         panic("%s: Linked CCB Lun Mismatch", aha_name(aha));
 1271                         break;
 1272                 case AHASTAT_INVALID_CCB_OR_SG_PARAM:
 1273                         panic("%s: Invalid CCB or SG list", aha_name(aha));
 1274                         break;
 1275                 case AHASTAT_HA_SCSI_BUS_RESET:
 1276                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
 1277                             != CAM_CMD_TIMEOUT)
 1278                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
 1279                         break;
 1280                 case AHASTAT_HA_BDR:
 1281                         if ((accb->flags & ACCB_DEVICE_RESET) == 0)
 1282                                 csio->ccb_h.status = CAM_BDR_SENT;
 1283                         else
 1284                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
 1285                         break;
 1286                 }
 1287                 if (csio->ccb_h.status != CAM_REQ_CMP) {
 1288                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
 1289                         csio->ccb_h.status |= CAM_DEV_QFRZN;
 1290                 }
 1291                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
 1292                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1293                 ahafreeccb(aha, accb);
 1294                 xpt_done(ccb);
 1295                 break;
 1296         case AMBI_OK:
 1297                 /* All completed without incident */
 1298                 /* XXX DO WE NEED TO COPY SENSE BYTES HERE???? XXX */
 1299                 /* I don't think so since it works???? */
 1300                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1301                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
 1302                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1303                 ahafreeccb(aha, accb);
 1304                 xpt_done(ccb);
 1305                 break;
 1306         }
 1307 }
 1308 
 1309 static int
 1310 ahareset(struct aha_softc* aha, int hard_reset)
 1311 {
 1312         struct   ccb_hdr *ccb_h;
 1313         u_int    status;
 1314         u_int    timeout;
 1315         uint8_t reset_type;
 1316 
 1317         if (hard_reset != 0)
 1318                 reset_type = HARD_RESET;
 1319         else
 1320                 reset_type = SOFT_RESET;
 1321         aha_outb(aha, CONTROL_REG, reset_type);
 1322 
 1323         /* Wait 5sec. for Diagnostic start */
 1324         timeout = 5 * 10000;
 1325         while (--timeout) {
 1326                 status = aha_inb(aha, STATUS_REG);
 1327                 if ((status & DIAG_ACTIVE) != 0)
 1328                         break;
 1329                 DELAY(100);
 1330         }
 1331         if (timeout == 0) {
 1332                 PRVERB((aha->dev, "ahareset - Diagnostic Active failed to "
 1333                     "assert. status = %#x\n", status));
 1334                 return (ETIMEDOUT);
 1335         }
 1336 
 1337         /* Wait 10sec. for Diagnostic end */
 1338         timeout = 10 * 10000;
 1339         while (--timeout) {
 1340                 status = aha_inb(aha, STATUS_REG);
 1341                 if ((status & DIAG_ACTIVE) == 0)
 1342                         break;
 1343                 DELAY(100);
 1344         }
 1345         if (timeout == 0) {
 1346                 panic("%s: ahareset - Diagnostic Active failed to drop. "
 1347                     "status = 0x%x\n", aha_name(aha), status);
 1348                 return (ETIMEDOUT);
 1349         }
 1350 
 1351         /* Wait for the host adapter to become ready or report a failure */
 1352         timeout = 10000;
 1353         while (--timeout) {
 1354                 status = aha_inb(aha, STATUS_REG);
 1355                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
 1356                         break;
 1357                 DELAY(100);
 1358         }
 1359         if (timeout == 0) {
 1360                 device_printf(aha->dev, "ahareset - Host adapter failed to "
 1361                     "come ready. status = 0x%x\n", status);
 1362                 return (ETIMEDOUT);
 1363         }
 1364 
 1365         /* If the diagnostics failed, tell the user */
 1366         if ((status & DIAG_FAIL) != 0
 1367          || (status & HA_READY) == 0) {
 1368                 device_printf(aha->dev, "ahareset - Adapter failed diag\n");
 1369 
 1370                 if ((status & DATAIN_REG_READY) != 0)
 1371                         device_printf(aha->dev, "ahareset - Host Adapter "
 1372                             "Error code = 0x%x\n", aha_inb(aha, DATAIN_REG));
 1373                 return (ENXIO);
 1374         }
 1375 
 1376         /* If we've attached to the XPT, tell it about the event */
 1377         if (aha->path != NULL)
 1378                 xpt_async(AC_BUS_RESET, aha->path, NULL);
 1379 
 1380         /*
 1381          * Perform completion processing for all outstanding CCBs.
 1382          */
 1383         while ((ccb_h = LIST_FIRST(&aha->pending_ccbs)) != NULL) {
 1384                 struct aha_ccb *pending_accb;
 1385 
 1386                 pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1387                 pending_accb->hccb.ahastat = AHASTAT_HA_SCSI_BUS_RESET;
 1388                 ahadone(aha, pending_accb, AMBI_ERROR);
 1389         }
 1390 
 1391         /* If we've allocated mailboxes, initialize them */
 1392         /* Must be done after we've aborted our queue, or aha_cmd fails */
 1393         if (aha->init_level > 4)
 1394                 ahainitmboxes(aha);
 1395 
 1396         return (0);
 1397 }
 1398 
 1399 /*
 1400  * Send a command to the adapter.
 1401  */
 1402 int
 1403 aha_cmd(struct aha_softc *aha, aha_op_t opcode, uint8_t *params,
 1404         u_int param_len, uint8_t *reply_data, u_int reply_len,
 1405         u_int cmd_timeout)
 1406 {
 1407         u_int   timeout;
 1408         u_int   status;
 1409         u_int   saved_status;
 1410         u_int   intstat;
 1411         u_int   reply_buf_size;
 1412         int     cmd_complete;
 1413         int     error;
 1414 
 1415         /* No data returned to start */
 1416         reply_buf_size = reply_len;
 1417         reply_len = 0;
 1418         intstat = 0;
 1419         cmd_complete = 0;
 1420         saved_status = 0;
 1421         error = 0;
 1422 
 1423         /*
 1424          * All commands except for the "start mailbox" and the "enable
 1425          * outgoing mailbox read interrupt" commands cannot be issued
 1426          * while there are pending transactions.  Freeze our SIMQ
 1427          * and wait for all completions to occur if necessary.
 1428          */
 1429         timeout = 10000;
 1430         while (LIST_FIRST(&aha->pending_ccbs) != NULL && --timeout) {
 1431                 /* Fire the interrupt handler in case interrupts are blocked */
 1432                 aha_intr(aha);
 1433                 DELAY(10);
 1434         }
 1435 
 1436         if (timeout == 0) {
 1437                 device_printf(aha->dev, 
 1438                     "aha_cmd: Timeout waiting for adapter idle\n");
 1439                 return (ETIMEDOUT);
 1440         }
 1441         aha->command_cmp = 0;
 1442         /*
 1443          * Wait up to 10 sec. for the adapter to become
 1444          * ready to accept commands.
 1445          */
 1446         timeout = 100000;
 1447         while (--timeout) {
 1448                 status = aha_inb(aha, STATUS_REG);
 1449                 if ((status & HA_READY) != 0 && (status & CMD_REG_BUSY) == 0)
 1450                         break;
 1451                 /*
 1452                  * Throw away any pending data which may be
 1453                  * left over from earlier commands that we
 1454                  * timedout on.
 1455                  */
 1456                 if ((status & DATAIN_REG_READY) != 0)
 1457                         (void)aha_inb(aha, DATAIN_REG);
 1458                 DELAY(100);
 1459         }
 1460         if (timeout == 0) {
 1461                 device_printf(aha->dev, "aha_cmd: Timeout waiting for adapter"
 1462                     " ready, status = 0x%x\n", status);
 1463                 return (ETIMEDOUT);
 1464         }
 1465 
 1466         /*
 1467          * Send the opcode followed by any necessary parameter bytes.
 1468          */
 1469         aha_outb(aha, COMMAND_REG, opcode);
 1470 
 1471         /*
 1472          * Wait for up to 1sec to get the parameter list sent
 1473          */
 1474         timeout = 10000;
 1475         while (param_len && --timeout) {
 1476                 DELAY(100);
 1477                 status = aha_inb(aha, STATUS_REG);
 1478                 intstat = aha_inb(aha, INTSTAT_REG);
 1479 
 1480                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1481                  == (INTR_PENDING|CMD_COMPLETE)) {
 1482                         saved_status = status;
 1483                         cmd_complete = 1;
 1484                         break;
 1485                 }
 1486 
 1487                 if (aha->command_cmp != 0) {
 1488                         saved_status = aha->latched_status;
 1489                         cmd_complete = 1;
 1490                         break;
 1491                 }
 1492                 if ((status & DATAIN_REG_READY) != 0)
 1493                         break;
 1494                 if ((status & CMD_REG_BUSY) == 0) {
 1495                         aha_outb(aha, COMMAND_REG, *params++);
 1496                         param_len--;
 1497                         timeout = 10000;
 1498                 }
 1499         }
 1500         if (timeout == 0) {
 1501                 device_printf(aha->dev, "aha_cmd: Timeout sending parameters, "
 1502                     "status = 0x%x\n", status);
 1503                 error = ETIMEDOUT;
 1504         }
 1505 
 1506         /*
 1507          * For all other commands, we wait for any output data
 1508          * and the final comand completion interrupt.
 1509          */
 1510         while (cmd_complete == 0 && --cmd_timeout) {
 1511 
 1512                 status = aha_inb(aha, STATUS_REG);
 1513                 intstat = aha_inb(aha, INTSTAT_REG);
 1514 
 1515                 if (aha->command_cmp != 0) {
 1516                         cmd_complete = 1;
 1517                         saved_status = aha->latched_status;
 1518                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1519                         == (INTR_PENDING|CMD_COMPLETE)) {
 1520                         /*
 1521                          * Our poll (in case interrupts are blocked)
 1522                          * saw the CMD_COMPLETE interrupt.
 1523                          */
 1524                         cmd_complete = 1;
 1525                         saved_status = status;
 1526                 }
 1527                 if ((status & DATAIN_REG_READY) != 0) {
 1528                         uint8_t data;
 1529 
 1530                         data = aha_inb(aha, DATAIN_REG);
 1531                         if (reply_len < reply_buf_size) {
 1532                                 *reply_data++ = data;
 1533                         } else {
 1534                                 device_printf(aha->dev, 
 1535                                     "aha_cmd - Discarded reply data "
 1536                                     "byte for opcode 0x%x\n", opcode);
 1537                         }
 1538                         /*
 1539                          * Reset timeout to ensure at least a second
 1540                          * between response bytes.
 1541                          */
 1542                         cmd_timeout = MAX(cmd_timeout, 10000);
 1543                         reply_len++;
 1544                 }
 1545                 DELAY(100);
 1546         }
 1547         if (cmd_timeout == 0) {
 1548                 device_printf(aha->dev, "aha_cmd: Timeout: status = 0x%x, "
 1549                     "intstat = 0x%x, reply_len = %d\n", status, intstat,
 1550                     reply_len);
 1551                 return (ETIMEDOUT);
 1552         }
 1553 
 1554         /*
 1555          * Clear any pending interrupts.  Block interrupts so our
 1556          * interrupt handler is not re-entered.
 1557          */
 1558         aha_intr(aha);
 1559 
 1560         if (error != 0)
 1561                 return (error);
 1562 
 1563         /*
 1564          * If the command was rejected by the controller, tell the caller.
 1565          */
 1566         if ((saved_status & CMD_INVALID) != 0) {
 1567                 PRVERB((aha->dev, "Invalid Command 0x%x\n", opcode));
 1568                 /*
 1569                  * Some early adapters may not recover properly from
 1570                  * an invalid command.  If it appears that the controller
 1571                  * has wedged (i.e. status was not cleared by our interrupt
 1572                  * reset above), perform a soft reset.
 1573                  */
 1574                 DELAY(1000);
 1575                 status = aha_inb(aha, STATUS_REG);
 1576                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
 1577                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
 1578                  || (status & (HA_READY|INIT_REQUIRED))
 1579                   != (HA_READY|INIT_REQUIRED))
 1580                         ahareset(aha, /*hard_reset*/FALSE);
 1581                 return (EINVAL);
 1582         }
 1583 
 1584         if (param_len > 0) {
 1585                 /* The controller did not accept the full argument list */
 1586                 PRVERB((aha->dev, "Controller did not accept full argument "
 1587                     "list (%d > 0)\n", param_len));
 1588                 return (E2BIG);
 1589         }
 1590 
 1591         if (reply_len != reply_buf_size) {
 1592                 /* Too much or too little data received */
 1593                 PRVERB((aha->dev, "data received mismatch (%d != %d)\n",
 1594                     reply_len, reply_buf_size));
 1595                 return (EMSGSIZE);
 1596         }
 1597 
 1598         /* We were successful */
 1599         return (0);
 1600 }
 1601 
 1602 static int
 1603 ahainitmboxes(struct aha_softc *aha)
 1604 {
 1605         int error;
 1606         init_24b_mbox_params_t init_mbox;
 1607 
 1608         bzero(aha->in_boxes, sizeof(aha_mbox_in_t) * aha->num_boxes);
 1609         bzero(aha->out_boxes, sizeof(aha_mbox_out_t) * aha->num_boxes);
 1610         aha->cur_inbox = aha->in_boxes;
 1611         aha->last_inbox = aha->in_boxes + aha->num_boxes - 1;
 1612         aha->cur_outbox = aha->out_boxes;
 1613         aha->last_outbox = aha->out_boxes + aha->num_boxes - 1;
 1614 
 1615         /* Tell the adapter about them */
 1616         init_mbox.num_mboxes = aha->num_boxes;
 1617         ahautoa24(aha->mailbox_physbase, init_mbox.base_addr);
 1618         error = aha_cmd(aha, AOP_INITIALIZE_MBOX, (uint8_t *)&init_mbox,
 1619             /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
 1620             /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
 1621 
 1622         if (error != 0)
 1623                 printf("ahainitmboxes: Initialization command failed\n");
 1624         return (error);
 1625 }
 1626 
 1627 /*
 1628  * Update the XPT's idea of the negotiated transfer
 1629  * parameters for a particular target.
 1630  */
 1631 static void
 1632 ahafetchtransinfo(struct aha_softc *aha, struct ccb_trans_settings* cts)
 1633 {
 1634         setup_data_t    setup_info;
 1635         u_int           target;
 1636         u_int           targ_offset;
 1637         u_int           sync_period;
 1638         int             error;
 1639         uint8_t param;
 1640         targ_syncinfo_t sync_info;
 1641         struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
 1642 
 1643         target = cts->ccb_h.target_id;
 1644         targ_offset = (target & 0x7);
 1645 
 1646         /*
 1647          * Inquire Setup Information.  This command retreives
 1648          * the sync info for older models.
 1649          */
 1650         param = sizeof(setup_info);
 1651         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
 1652             (uint8_t*)&setup_info, sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
 1653 
 1654         if (error != 0) {
 1655                 device_printf(aha->dev,
 1656                     "ahafetchtransinfo - Inquire Setup Info Failed %d\n",
 1657                     error);
 1658                 return;
 1659         }
 1660 
 1661         sync_info = setup_info.syncinfo[targ_offset];
 1662 
 1663         if (sync_info.sync == 0)
 1664                 spi->sync_offset = 0;
 1665         else
 1666                 spi->sync_offset = sync_info.offset;
 1667 
 1668         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 1669 
 1670         if (aha->boardid >= BOARD_1542CF)
 1671                 sync_period = 1000;
 1672         else
 1673                 sync_period = 2000;
 1674         sync_period += 500 * sync_info.period;
 1675 
 1676         /* Convert ns value to standard SCSI sync rate */
 1677         if (spi->sync_offset != 0)
 1678                 spi->sync_period = scsi_calc_syncparam(sync_period);
 1679         else
 1680                 spi->sync_period = 0;
 1681 
 1682         spi->valid = CTS_SPI_VALID_SYNC_RATE
 1683                    | CTS_SPI_VALID_SYNC_OFFSET
 1684                    | CTS_SPI_VALID_BUS_WIDTH;
 1685         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
 1686 }
 1687 
 1688 static void
 1689 ahamapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1690 {
 1691         struct aha_softc* aha;
 1692 
 1693         aha = (struct aha_softc*)arg;
 1694         aha->mailbox_physbase = segs->ds_addr;
 1695 }
 1696 
 1697 static void
 1698 ahamapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1699 {
 1700         struct aha_softc* aha;
 1701 
 1702         aha = (struct aha_softc*)arg;
 1703         aha->aha_ccb_physbase = segs->ds_addr;
 1704 }
 1705 
 1706 static void
 1707 ahamapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1708 {
 1709 
 1710         struct aha_softc* aha;
 1711 
 1712         aha = (struct aha_softc*)arg;
 1713         SLIST_FIRST(&aha->sg_maps)->sg_physaddr = segs->ds_addr;
 1714 }
 1715 
 1716 static void
 1717 ahapoll(struct cam_sim *sim)
 1718 {
 1719         aha_intr_locked(cam_sim_softc(sim));
 1720 }
 1721 
 1722 static void
 1723 ahatimeout(void *arg)
 1724 {
 1725         struct aha_ccb  *accb;
 1726         union  ccb      *ccb;
 1727         struct aha_softc *aha;
 1728         uint32_t        paddr;
 1729         struct ccb_hdr *ccb_h;
 1730 
 1731         accb = (struct aha_ccb *)arg;
 1732         ccb = accb->ccb;
 1733         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
 1734         mtx_assert(&aha->lock, MA_OWNED);
 1735         xpt_print_path(ccb->ccb_h.path);
 1736         printf("CCB %p - timed out\n", (void *)accb);
 1737 
 1738         if ((accb->flags & ACCB_ACTIVE) == 0) {
 1739                 xpt_print_path(ccb->ccb_h.path);
 1740                 printf("CCB %p - timed out CCB already completed\n",
 1741                     (void *)accb);
 1742                 return;
 1743         }
 1744 
 1745         /*
 1746          * In order to simplify the recovery process, we ask the XPT
 1747          * layer to halt the queue of new transactions and we traverse
 1748          * the list of pending CCBs and remove their timeouts. This
 1749          * means that the driver attempts to clear only one error
 1750          * condition at a time.  In general, timeouts that occur
 1751          * close together are related anyway, so there is no benefit
 1752          * in attempting to handle errors in parrallel.  Timeouts will
 1753          * be reinstated when the recovery process ends.
 1754          */
 1755         if ((accb->flags & ACCB_DEVICE_RESET) == 0) {
 1756                 if ((accb->flags & ACCB_RELEASE_SIMQ) == 0) {
 1757                         xpt_freeze_simq(aha->sim, /*count*/1);
 1758                         accb->flags |= ACCB_RELEASE_SIMQ;
 1759                 }
 1760 
 1761                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
 1762                 while (ccb_h != NULL) {
 1763                         struct aha_ccb *pending_accb;
 1764 
 1765                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1766                         callout_stop(&pending_accb->timer);
 1767                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1768                 }
 1769         }
 1770 
 1771         if ((accb->flags & ACCB_DEVICE_RESET) != 0
 1772          || aha->cur_outbox->action_code != AMBO_FREE) {
 1773                 /*
 1774                  * Try a full host adapter/SCSI bus reset.
 1775                  * We do this only if we have already attempted
 1776                  * to clear the condition with a BDR, or we cannot
 1777                  * attempt a BDR for lack of mailbox resources.
 1778                  */
 1779                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 1780                 ahareset(aha, /*hardreset*/TRUE);
 1781                 device_printf(aha->dev, "No longer in timeout\n");
 1782         } else {
 1783                 /*
 1784                  * Send a Bus Device Reset message:
 1785                  * The target that is holding up the bus may not
 1786                  * be the same as the one that triggered this timeout
 1787                  * (different commands have different timeout lengths),
 1788                  * but we have no way of determining this from our
 1789                  * timeout handler.  Our strategy here is to queue a
 1790                  * BDR message to the target of the timed out command.
 1791                  * If this fails, we'll get another timeout 2 seconds
 1792                  * later which will attempt a bus reset.
 1793                  */
 1794                 accb->flags |= ACCB_DEVICE_RESET;
 1795                 callout_reset(&accb->timer, 2 * hz, ahatimeout, accb);
 1796                 aha->recovery_accb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
 1797 
 1798                 /* No Data Transfer */
 1799                 aha->recovery_accb->hccb.datain = TRUE;
 1800                 aha->recovery_accb->hccb.dataout = TRUE;
 1801                 aha->recovery_accb->hccb.ahastat = 0;
 1802                 aha->recovery_accb->hccb.sdstat = 0;
 1803                 aha->recovery_accb->hccb.target = ccb->ccb_h.target_id;
 1804 
 1805                 /* Tell the adapter about this command */
 1806                 paddr = ahaccbvtop(aha, aha->recovery_accb);
 1807                 ahautoa24(paddr, aha->cur_outbox->ccb_addr);
 1808                 aha->cur_outbox->action_code = AMBO_START;
 1809                 aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
 1810                 ahanextoutbox(aha);
 1811         }
 1812 }
 1813 
 1814 int
 1815 aha_detach(struct aha_softc *aha)
 1816 {
 1817         mtx_lock(&aha->lock);
 1818         xpt_async(AC_LOST_DEVICE, aha->path, NULL);
 1819         xpt_free_path(aha->path);
 1820         xpt_bus_deregister(cam_sim_path(aha->sim));
 1821         cam_sim_free(aha->sim, /*free_devq*/TRUE);
 1822         mtx_unlock(&aha->lock);
 1823         /* XXX: Drain all timers? */
 1824         return (0);
 1825 }
 1826 MODULE_DEPEND(aha, cam, 1, 1, 1);

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